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authorLinus Torvalds <torvalds@linux-foundation.org>2018-08-16 09:21:54 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2018-08-16 09:21:54 -0700
commit4e31843f681c34f7185e7d169fe627c9d891ce2c (patch)
tree7717ffdea5621cb68edb746bb21f6acd32f49aa9 /drivers/pci
parentf91e654474d413201ae578820fb63f8a811f6c4e (diff)
parentfa687fb9ced47b97bd22297366e788dac1927dd7 (diff)
Merge tag 'pci-v4.19-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci
Pull pci updates from Bjorn Helgaas: - Decode AER errors with names similar to "lspci" (Tyler Baicar) - Expose AER statistics in sysfs (Rajat Jain) - Clear AER status bits selectively based on the type of recovery (Oza Pawandeep) - Honor "pcie_ports=native" even if HEST sets FIRMWARE_FIRST (Alexandru Gagniuc) - Don't clear AER status bits if we're using the "Firmware-First" strategy where firmware owns the registers (Alexandru Gagniuc) - Use sysfs_match_string() to simplify ASPM sysfs parsing (Andy Shevchenko) - Remove unnecessary includes of <linux/pci-aspm.h> (Bjorn Helgaas) - Defer DPC event handling to work queue (Keith Busch) - Use threaded IRQ for DPC bottom half (Keith Busch) - Print AER status while handling DPC events (Keith Busch) - Work around IDT switch ACS Source Validation erratum (James Puthukattukaran) - Emit diagnostics for all cases of PCIe Link downtraining (Links operating slower than they're capable of) (Alexandru Gagniuc) - Skip VFs when configuring Max Payload Size (Myron Stowe) - Reduce Root Port Max Payload Size if necessary when hot-adding a device below it (Myron Stowe) - Simplify SHPC existence/permission checks (Bjorn Helgaas) - Remove hotplug sample skeleton driver (Lukas Wunner) - Convert pciehp to threaded IRQ handling (Lukas Wunner) - Improve pciehp tolerance of missed events and initially unstable links (Lukas Wunner) - Clear spurious pciehp events on resume (Lukas Wunner) - Add pciehp runtime PM support, including for Thunderbolt controllers (Lukas Wunner) - Support interrupts from pciehp bridges in D3hot (Lukas Wunner) - Mark fall-through switch cases before enabling -Wimplicit-fallthrough (Gustavo A. R. Silva) - Move DMA-debug PCI init from arch code to PCI core (Christoph Hellwig) - Fix pci_request_irq() usage of IRQF_ONESHOT when no handler is supplied (Heiner Kallweit) - Unify PCI and DMA direction #defines (Shunyong Yang) - Add PCI_DEVICE_DATA() macro (Andy Shevchenko) - Check for VPD completion before checking for timeout (Bert Kenward) - Limit Netronome NFP5000 config space size to work around erratum (Jakub Kicinski) - Set IRQCHIP_ONESHOT_SAFE for PCI MSI irqchips (Heiner Kallweit) - Document ACPI description of PCI host bridges (Bjorn Helgaas) - Add "pci=disable_acs_redir=" parameter to disable ACS redirection for peer-to-peer DMA support (we don't have the peer-to-peer support yet; this is just one piece) (Logan Gunthorpe) - Clean up devm_of_pci_get_host_bridge_resources() resource allocation (Jan Kiszka) - Fixup resizable BARs after suspend/resume (Christian König) - Make "pci=earlydump" generic (Sinan Kaya) - Fix ROM BAR access routines to stay in bounds and check for signature correctly (Rex Zhu) - Add DMA alias quirk for Microsemi Switchtec NTB (Doug Meyer) - Expand documentation for pci_add_dma_alias() (Logan Gunthorpe) - To avoid bus errors, enable PASID only if entire path supports End-End TLP prefixes (Sinan Kaya) - Unify slot and bus reset functions and remove hotplug knowledge from callers (Sinan Kaya) - Add Function-Level Reset quirks for Intel and Samsung NVMe devices to fix guest reboot issues (Alex Williamson) - Add function 1 DMA alias quirk for Marvell 88SS9183 PCIe SSD Controller (Bjorn Helgaas) - Remove Xilinx AXI-PCIe host bridge arch dependency (Palmer Dabbelt) - Remove Aardvark outbound window configuration (Evan Wang) - Fix Aardvark bridge window sizing issue (Zachary Zhang) - Convert Aardvark to use pci_host_probe() to reduce code duplication (Thomas Petazzoni) - Correct the Cadence cdns_pcie_writel() signature (Alan Douglas) - Add Cadence support for optional generic PHYs (Alan Douglas) - Add Cadence power management ops (Alan Douglas) - Remove redundant variable from Cadence driver (Colin Ian King) - Add Kirin MSI support (Xiaowei Song) - Drop unnecessary root_bus_nr setting from exynos, imx6, keystone, armada8k, artpec6, designware-plat, histb, qcom, spear13xx (Shawn Guo) - Move link notification settings from DesignWare core to individual drivers (Gustavo Pimentel) - Add endpoint library MSI-X interfaces (Gustavo Pimentel) - Correct signature of endpoint library IRQ interfaces (Gustavo Pimentel) - Add DesignWare endpoint library MSI-X callbacks (Gustavo Pimentel) - Add endpoint library MSI-X test support (Gustavo Pimentel) - Remove unnecessary GFP_ATOMIC from Hyper-V "new child" allocation (Jia-Ju Bai) - Add more devices to Broadcom PAXC quirk (Ray Jui) - Work around corrupted Broadcom PAXC config space to enable SMMU and GICv3 ITS (Ray Jui) - Disable MSI parsing to work around broken Broadcom PAXC logic in some devices (Ray Jui) - Hide unconfigured functions to work around a Broadcom PAXC defect (Ray Jui) - Lower iproc log level to reduce console output during boot (Ray Jui) - Fix mobiveil iomem/phys_addr_t type usage (Lorenzo Pieralisi) - Fix mobiveil missing include file (Lorenzo Pieralisi) - Add mobiveil Kconfig/Makefile support (Lorenzo Pieralisi) - Fix mvebu I/O space remapping issues (Thomas Petazzoni) - Use generic pci_host_bridge in mvebu instead of ARM-specific API (Thomas Petazzoni) - Whitelist VMD devices with fast interrupt handlers to avoid sharing vectors with slow handlers (Keith Busch) * tag 'pci-v4.19-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (153 commits) PCI/AER: Don't clear AER bits if error handling is Firmware-First PCI: Limit config space size for Netronome NFP5000 PCI/MSI: Set IRQCHIP_ONESHOT_SAFE for PCI-MSI irqchips PCI/VPD: Check for VPD access completion before checking for timeout PCI: Add PCI_DEVICE_DATA() macro to fully describe device ID entry PCI: Match Root Port's MPS to endpoint's MPSS as necessary PCI: Skip MPS logic for Virtual Functions (VFs) PCI: Add function 1 DMA alias quirk for Marvell 88SS9183 PCI: Check for PCIe Link downtraining PCI: Add ACS Redirect disable quirk for Intel Sunrise Point PCI: Add device-specific ACS Redirect disable infrastructure PCI: Convert device-specific ACS quirks from NULL termination to ARRAY_SIZE PCI: Add "pci=disable_acs_redir=" parameter for peer-to-peer support PCI: Allow specifying devices using a base bus and path of devfns PCI: Make specifying PCI devices in kernel parameters reusable PCI: Hide ACS quirk declarations inside PCI core PCI: Delay after FLR of Intel DC P3700 NVMe PCI: Disable Samsung SM961/PM961 NVMe before FLR PCI: Export pcie_has_flr() PCI: mvebu: Drop bogus comment above mvebu_pcie_map_registers() ...
Diffstat (limited to 'drivers/pci')
-rw-r--r--drivers/pci/ats.c3
-rw-r--r--drivers/pci/controller/Kconfig12
-rw-r--r--drivers/pci/controller/Makefile1
-rw-r--r--drivers/pci/controller/dwc/pci-dra7xx.c2
-rw-r--r--drivers/pci/controller/dwc/pci-exynos.c1
-rw-r--r--drivers/pci/controller/dwc/pci-imx6.c1
-rw-r--r--drivers/pci/controller/dwc/pci-keystone.c1
-rw-r--r--drivers/pci/controller/dwc/pcie-armada8k.c1
-rw-r--r--drivers/pci/controller/dwc/pcie-artpec6.c3
-rw-r--r--drivers/pci/controller/dwc/pcie-designware-ep.c210
-rw-r--r--drivers/pci/controller/dwc/pcie-designware-plat.c12
-rw-r--r--drivers/pci/controller/dwc/pcie-designware.h29
-rw-r--r--drivers/pci/controller/dwc/pcie-histb.c1
-rw-r--r--drivers/pci/controller/dwc/pcie-kirin.c28
-rw-r--r--drivers/pci/controller/dwc/pcie-qcom.c1
-rw-r--r--drivers/pci/controller/dwc/pcie-spear13xx.c1
-rw-r--r--drivers/pci/controller/pci-aardvark.c79
-rw-r--r--drivers/pci/controller/pci-hyperv.c2
-rw-r--r--drivers/pci/controller/pci-mvebu.c153
-rw-r--r--drivers/pci/controller/pcie-cadence-ep.c21
-rw-r--r--drivers/pci/controller/pcie-cadence-host.c33
-rw-r--r--drivers/pci/controller/pcie-cadence.c123
-rw-r--r--drivers/pci/controller/pcie-cadence.h13
-rw-r--r--drivers/pci/controller/pcie-iproc.c159
-rw-r--r--drivers/pci/controller/pcie-iproc.h8
-rw-r--r--drivers/pci/controller/pcie-mobiveil.c4
-rw-r--r--drivers/pci/controller/pcie-rockchip-ep.c2
-rw-r--r--drivers/pci/controller/vmd.c13
-rw-r--r--drivers/pci/endpoint/functions/pci-epf-test.c86
-rw-r--r--drivers/pci/endpoint/pci-ep-cfs.c24
-rw-r--r--drivers/pci/endpoint/pci-epc-core.c68
-rw-r--r--drivers/pci/hotplug/acpi_pcihp.c36
-rw-r--r--drivers/pci/hotplug/acpiphp_core.c22
-rw-r--r--drivers/pci/hotplug/cpci_hotplug_core.c14
-rw-r--r--drivers/pci/hotplug/cpqphp_core.c16
-rw-r--r--drivers/pci/hotplug/ibmphp_core.c15
-rw-r--r--drivers/pci/hotplug/ibmphp_ebda.c20
-rw-r--r--drivers/pci/hotplug/pci_hotplug_core.c134
-rw-r--r--drivers/pci/hotplug/pciehp.h117
-rw-r--r--drivers/pci/hotplug/pciehp_core.c127
-rw-r--r--drivers/pci/hotplug/pciehp_ctrl.c351
-rw-r--r--drivers/pci/hotplug/pciehp_hpc.c281
-rw-r--r--drivers/pci/hotplug/pciehp_pci.c4
-rw-r--r--drivers/pci/hotplug/pcihp_skeleton.c348
-rw-r--r--drivers/pci/hotplug/pnv_php.c5
-rw-r--r--drivers/pci/hotplug/rpaphp_core.c2
-rw-r--r--drivers/pci/hotplug/rpaphp_slot.c13
-rw-r--r--drivers/pci/hotplug/s390_pci_hpc.c13
-rw-r--r--drivers/pci/hotplug/sgi_hotplug.c9
-rw-r--r--drivers/pci/hotplug/shpchp_core.c41
-rw-r--r--drivers/pci/hotplug/shpchp_ctrl.c2
-rw-r--r--drivers/pci/iov.c4
-rw-r--r--drivers/pci/irq.c6
-rw-r--r--drivers/pci/msi.c3
-rw-r--r--drivers/pci/of.c14
-rw-r--r--drivers/pci/pci-acpi.c19
-rw-r--r--drivers/pci/pci-driver.c2
-rw-r--r--drivers/pci/pci-sysfs.c6
-rw-r--r--drivers/pci/pci.c503
-rw-r--r--drivers/pci/pci.h69
-rw-r--r--drivers/pci/pcie/aer.c341
-rw-r--r--drivers/pci/pcie/aspm.c8
-rw-r--r--drivers/pci/pcie/dpc.c107
-rw-r--r--drivers/pci/pcie/err.c21
-rw-r--r--drivers/pci/pcie/portdrv.h2
-rw-r--r--drivers/pci/pcie/portdrv_core.c30
-rw-r--r--drivers/pci/pcie/portdrv_pci.c27
-rw-r--r--drivers/pci/probe.c102
-rw-r--r--drivers/pci/quirks.c386
-rw-r--r--drivers/pci/remove.c1
-rw-r--r--drivers/pci/rom.c11
-rw-r--r--drivers/pci/switch/switchtec.c14
-rw-r--r--drivers/pci/vpd.c7
73 files changed, 2785 insertions, 1563 deletions
diff --git a/drivers/pci/ats.c b/drivers/pci/ats.c
index 4923a2a8e14b..5b78f3b1b918 100644
--- a/drivers/pci/ats.c
+++ b/drivers/pci/ats.c
@@ -273,6 +273,9 @@ int pci_enable_pasid(struct pci_dev *pdev, int features)
if (WARN_ON(pdev->pasid_enabled))
return -EBUSY;
+ if (!pdev->eetlp_prefix_path)
+ return -EINVAL;
+
pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_PASID);
if (!pos)
return -EINVAL;
diff --git a/drivers/pci/controller/Kconfig b/drivers/pci/controller/Kconfig
index cc9fa02d32a0..028b287466fb 100644
--- a/drivers/pci/controller/Kconfig
+++ b/drivers/pci/controller/Kconfig
@@ -102,7 +102,7 @@ config PCI_HOST_GENERIC
config PCIE_XILINX
bool "Xilinx AXI PCIe host bridge support"
- depends on ARCH_ZYNQ || MICROBLAZE || (MIPS && PCI_DRIVERS_GENERIC) || COMPILE_TEST
+ depends on OF || COMPILE_TEST
help
Say 'Y' here if you want kernel to support the Xilinx AXI PCIe
Host Bridge driver.
@@ -239,6 +239,16 @@ config PCIE_MEDIATEK
Say Y here if you want to enable PCIe controller support on
MediaTek SoCs.
+config PCIE_MOBIVEIL
+ bool "Mobiveil AXI PCIe controller"
+ depends on ARCH_ZYNQMP || COMPILE_TEST
+ depends on OF
+ depends on PCI_MSI_IRQ_DOMAIN
+ help
+ Say Y here if you want to enable support for the Mobiveil AXI PCIe
+ Soft IP. It has up to 8 outbound and inbound windows
+ for address translation and it is a PCIe Gen4 IP.
+
config PCIE_TANGO_SMP8759
bool "Tango SMP8759 PCIe controller (DANGEROUS)"
depends on ARCH_TANGO && PCI_MSI && OF
diff --git a/drivers/pci/controller/Makefile b/drivers/pci/controller/Makefile
index 24322b92f200..d56a507495c5 100644
--- a/drivers/pci/controller/Makefile
+++ b/drivers/pci/controller/Makefile
@@ -26,6 +26,7 @@ obj-$(CONFIG_PCIE_ROCKCHIP) += pcie-rockchip.o
obj-$(CONFIG_PCIE_ROCKCHIP_EP) += pcie-rockchip-ep.o
obj-$(CONFIG_PCIE_ROCKCHIP_HOST) += pcie-rockchip-host.o
obj-$(CONFIG_PCIE_MEDIATEK) += pcie-mediatek.o
+obj-$(CONFIG_PCIE_MOBIVEIL) += pcie-mobiveil.o
obj-$(CONFIG_PCIE_TANGO_SMP8759) += pcie-tango.o
obj-$(CONFIG_VMD) += vmd.o
# pcie-hisi.o quirks are needed even without CONFIG_PCIE_DW
diff --git a/drivers/pci/controller/dwc/pci-dra7xx.c b/drivers/pci/controller/dwc/pci-dra7xx.c
index 345aab56ce8b..ce9224a36f62 100644
--- a/drivers/pci/controller/dwc/pci-dra7xx.c
+++ b/drivers/pci/controller/dwc/pci-dra7xx.c
@@ -370,7 +370,7 @@ static void dra7xx_pcie_raise_msi_irq(struct dra7xx_pcie *dra7xx,
}
static int dra7xx_pcie_raise_irq(struct dw_pcie_ep *ep, u8 func_no,
- enum pci_epc_irq_type type, u8 interrupt_num)
+ enum pci_epc_irq_type type, u16 interrupt_num)
{
struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
struct dra7xx_pcie *dra7xx = to_dra7xx_pcie(pci);
diff --git a/drivers/pci/controller/dwc/pci-exynos.c b/drivers/pci/controller/dwc/pci-exynos.c
index 4cc1e5df8c79..cee5f2f590e2 100644
--- a/drivers/pci/controller/dwc/pci-exynos.c
+++ b/drivers/pci/controller/dwc/pci-exynos.c
@@ -421,7 +421,6 @@ static int __init exynos_add_pcie_port(struct exynos_pcie *ep,
}
}
- pp->root_bus_nr = -1;
pp->ops = &exynos_pcie_host_ops;
ret = dw_pcie_host_init(pp);
diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
index 80f604602783..4a9a673b4777 100644
--- a/drivers/pci/controller/dwc/pci-imx6.c
+++ b/drivers/pci/controller/dwc/pci-imx6.c
@@ -667,7 +667,6 @@ static int imx6_add_pcie_port(struct imx6_pcie *imx6_pcie,
}
}
- pp->root_bus_nr = -1;
pp->ops = &imx6_pcie_host_ops;
ret = dw_pcie_host_init(pp);
diff --git a/drivers/pci/controller/dwc/pci-keystone.c b/drivers/pci/controller/dwc/pci-keystone.c
index 3722a5f31e5e..e88bd221fffe 100644
--- a/drivers/pci/controller/dwc/pci-keystone.c
+++ b/drivers/pci/controller/dwc/pci-keystone.c
@@ -347,7 +347,6 @@ static int __init ks_add_pcie_port(struct keystone_pcie *ks_pcie,
}
}
- pp->root_bus_nr = -1;
pp->ops = &keystone_pcie_host_ops;
ret = ks_dw_pcie_host_init(ks_pcie, ks_pcie->msi_intc_np);
if (ret) {
diff --git a/drivers/pci/controller/dwc/pcie-armada8k.c b/drivers/pci/controller/dwc/pcie-armada8k.c
index 072fd7ecc29f..0c389a30ef5d 100644
--- a/drivers/pci/controller/dwc/pcie-armada8k.c
+++ b/drivers/pci/controller/dwc/pcie-armada8k.c
@@ -172,7 +172,6 @@ static int armada8k_add_pcie_port(struct armada8k_pcie *pcie,
struct device *dev = &pdev->dev;
int ret;
- pp->root_bus_nr = -1;
pp->ops = &armada8k_pcie_host_ops;
pp->irq = platform_get_irq(pdev, 0);
diff --git a/drivers/pci/controller/dwc/pcie-artpec6.c b/drivers/pci/controller/dwc/pcie-artpec6.c
index 321b56cfd5d0..dba83abfe764 100644
--- a/drivers/pci/controller/dwc/pcie-artpec6.c
+++ b/drivers/pci/controller/dwc/pcie-artpec6.c
@@ -399,7 +399,6 @@ static int artpec6_add_pcie_port(struct artpec6_pcie *artpec6_pcie,
}
}
- pp->root_bus_nr = -1;
pp->ops = &artpec6_pcie_host_ops;
ret = dw_pcie_host_init(pp);
@@ -428,7 +427,7 @@ static void artpec6_pcie_ep_init(struct dw_pcie_ep *ep)
}
static int artpec6_pcie_raise_irq(struct dw_pcie_ep *ep, u8 func_no,
- enum pci_epc_irq_type type, u8 interrupt_num)
+ enum pci_epc_irq_type type, u16 interrupt_num)
{
struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
diff --git a/drivers/pci/controller/dwc/pcie-designware-ep.c b/drivers/pci/controller/dwc/pcie-designware-ep.c
index 8650416f6f9e..1e7b02221eac 100644
--- a/drivers/pci/controller/dwc/pcie-designware-ep.c
+++ b/drivers/pci/controller/dwc/pcie-designware-ep.c
@@ -40,6 +40,39 @@ void dw_pcie_ep_reset_bar(struct dw_pcie *pci, enum pci_barno bar)
__dw_pcie_ep_reset_bar(pci, bar, 0);
}
+static u8 __dw_pcie_ep_find_next_cap(struct dw_pcie *pci, u8 cap_ptr,
+ u8 cap)
+{
+ u8 cap_id, next_cap_ptr;
+ u16 reg;
+
+ reg = dw_pcie_readw_dbi(pci, cap_ptr);
+ next_cap_ptr = (reg & 0xff00) >> 8;
+ cap_id = (reg & 0x00ff);
+
+ if (!next_cap_ptr || cap_id > PCI_CAP_ID_MAX)
+ return 0;
+
+ if (cap_id == cap)
+ return cap_ptr;
+
+ return __dw_pcie_ep_find_next_cap(pci, next_cap_ptr, cap);
+}
+
+static u8 dw_pcie_ep_find_capability(struct dw_pcie *pci, u8 cap)
+{
+ u8 next_cap_ptr;
+ u16 reg;
+
+ reg = dw_pcie_readw_dbi(pci, PCI_CAPABILITY_LIST);
+ next_cap_ptr = (reg & 0x00ff);
+
+ if (!next_cap_ptr)
+ return 0;
+
+ return __dw_pcie_ep_find_next_cap(pci, next_cap_ptr, cap);
+}
+
static int dw_pcie_ep_write_header(struct pci_epc *epc, u8 func_no,
struct pci_epf_header *hdr)
{
@@ -213,36 +246,84 @@ static int dw_pcie_ep_map_addr(struct pci_epc *epc, u8 func_no,
static int dw_pcie_ep_get_msi(struct pci_epc *epc, u8 func_no)
{
- int val;
struct dw_pcie_ep *ep = epc_get_drvdata(epc);
struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
+ u32 val, reg;
+
+ if (!ep->msi_cap)
+ return -EINVAL;
+
+ reg = ep->msi_cap + PCI_MSI_FLAGS;
+ val = dw_pcie_readw_dbi(pci, reg);
+ if (!(val & PCI_MSI_FLAGS_ENABLE))
+ return -EINVAL;
+
+ val = (val & PCI_MSI_FLAGS_QSIZE) >> 4;
+
+ return val;
+}
+
+static int dw_pcie_ep_set_msi(struct pci_epc *epc, u8 func_no, u8 interrupts)
+{
+ struct dw_pcie_ep *ep = epc_get_drvdata(epc);
+ struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
+ u32 val, reg;
+
+ if (!ep->msi_cap)
+ return -EINVAL;
+
+ reg = ep->msi_cap + PCI_MSI_FLAGS;
+ val = dw_pcie_readw_dbi(pci, reg);
+ val &= ~PCI_MSI_FLAGS_QMASK;
+ val |= (interrupts << 1) & PCI_MSI_FLAGS_QMASK;
+ dw_pcie_dbi_ro_wr_en(pci);
+ dw_pcie_writew_dbi(pci, reg, val);
+ dw_pcie_dbi_ro_wr_dis(pci);
+
+ return 0;
+}
+
+static int dw_pcie_ep_get_msix(struct pci_epc *epc, u8 func_no)
+{
+ struct dw_pcie_ep *ep = epc_get_drvdata(epc);
+ struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
+ u32 val, reg;
- val = dw_pcie_readw_dbi(pci, MSI_MESSAGE_CONTROL);
- if (!(val & MSI_CAP_MSI_EN_MASK))
+ if (!ep->msix_cap)
return -EINVAL;
- val = (val & MSI_CAP_MME_MASK) >> MSI_CAP_MME_SHIFT;
+ reg = ep->msix_cap + PCI_MSIX_FLAGS;
+ val = dw_pcie_readw_dbi(pci, reg);
+ if (!(val & PCI_MSIX_FLAGS_ENABLE))
+ return -EINVAL;
+
+ val &= PCI_MSIX_FLAGS_QSIZE;
+
return val;
}
-static int dw_pcie_ep_set_msi(struct pci_epc *epc, u8 func_no, u8 encode_int)
+static int dw_pcie_ep_set_msix(struct pci_epc *epc, u8 func_no, u16 interrupts)
{
- int val;
struct dw_pcie_ep *ep = epc_get_drvdata(epc);
struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
+ u32 val, reg;
+
+ if (!ep->msix_cap)
+ return -EINVAL;
- val = dw_pcie_readw_dbi(pci, MSI_MESSAGE_CONTROL);
- val &= ~MSI_CAP_MMC_MASK;
- val |= (encode_int << MSI_CAP_MMC_SHIFT) & MSI_CAP_MMC_MASK;
+ reg = ep->msix_cap + PCI_MSIX_FLAGS;
+ val = dw_pcie_readw_dbi(pci, reg);
+ val &= ~PCI_MSIX_FLAGS_QSIZE;
+ val |= interrupts;
dw_pcie_dbi_ro_wr_en(pci);
- dw_pcie_writew_dbi(pci, MSI_MESSAGE_CONTROL, val);
+ dw_pcie_writew_dbi(pci, reg, val);
dw_pcie_dbi_ro_wr_dis(pci);
return 0;
}
static int dw_pcie_ep_raise_irq(struct pci_epc *epc, u8 func_no,
- enum pci_epc_irq_type type, u8 interrupt_num)
+ enum pci_epc_irq_type type, u16 interrupt_num)
{
struct dw_pcie_ep *ep = epc_get_drvdata(epc);
@@ -282,32 +363,52 @@ static const struct pci_epc_ops epc_ops = {
.unmap_addr = dw_pcie_ep_unmap_addr,
.set_msi = dw_pcie_ep_set_msi,
.get_msi = dw_pcie_ep_get_msi,
+ .set_msix = dw_pcie_ep_set_msix,
+ .get_msix = dw_pcie_ep_get_msix,
.raise_irq = dw_pcie_ep_raise_irq,
.start = dw_pcie_ep_start,
.stop = dw_pcie_ep_stop,
};
+int dw_pcie_ep_raise_legacy_irq(struct dw_pcie_ep *ep, u8 func_no)
+{
+ struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
+ struct device *dev = pci->dev;
+
+ dev_err(dev, "EP cannot trigger legacy IRQs\n");
+
+ return -EINVAL;
+}
+
int dw_pcie_ep_raise_msi_irq(struct dw_pcie_ep *ep, u8 func_no,
u8 interrupt_num)
{
struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
struct pci_epc *epc = ep->epc;
u16 msg_ctrl, msg_data;
- u32 msg_addr_lower, msg_addr_upper;
+ u32 msg_addr_lower, msg_addr_upper, reg;
u64 msg_addr;
bool has_upper;
int ret;
+ if (!ep->msi_cap)
+ return -EINVAL;
+
/* Raise MSI per the PCI Local Bus Specification Revision 3.0, 6.8.1. */
- msg_ctrl = dw_pcie_readw_dbi(pci, MSI_MESSAGE_CONTROL);
+ reg = ep->msi_cap + PCI_MSI_FLAGS;
+ msg_ctrl = dw_pcie_readw_dbi(pci, reg);
has_upper = !!(msg_ctrl & PCI_MSI_FLAGS_64BIT);
- msg_addr_lower = dw_pcie_readl_dbi(pci, MSI_MESSAGE_ADDR_L32);
+ reg = ep->msi_cap + PCI_MSI_ADDRESS_LO;
+ msg_addr_lower = dw_pcie_readl_dbi(pci, reg);
if (has_upper) {
- msg_addr_upper = dw_pcie_readl_dbi(pci, MSI_MESSAGE_ADDR_U32);
- msg_data = dw_pcie_readw_dbi(pci, MSI_MESSAGE_DATA_64);
+ reg = ep->msi_cap + PCI_MSI_ADDRESS_HI;
+ msg_addr_upper = dw_pcie_readl_dbi(pci, reg);
+ reg = ep->msi_cap + PCI_MSI_DATA_64;
+ msg_data = dw_pcie_readw_dbi(pci, reg);
} else {
msg_addr_upper = 0;
- msg_data = dw_pcie_readw_dbi(pci, MSI_MESSAGE_DATA_32);
+ reg = ep->msi_cap + PCI_MSI_DATA_32;
+ msg_data = dw_pcie_readw_dbi(pci, reg);
}
msg_addr = ((u64) msg_addr_upper) << 32 | msg_addr_lower;
ret = dw_pcie_ep_map_addr(epc, func_no, ep->msi_mem_phys, msg_addr,
@@ -322,6 +423,64 @@ int dw_pcie_ep_raise_msi_irq(struct dw_pcie_ep *ep, u8 func_no,
return 0;
}
+int dw_pcie_ep_raise_msix_irq(struct dw_pcie_ep *ep, u8 func_no,
+ u16 interrupt_num)
+{
+ struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
+ struct pci_epc *epc = ep->epc;
+ u16 tbl_offset, bir;
+ u32 bar_addr_upper, bar_addr_lower;
+ u32 msg_addr_upper, msg_addr_lower;
+ u32 reg, msg_data, vec_ctrl;
+ u64 tbl_addr, msg_addr, reg_u64;
+ void __iomem *msix_tbl;
+ int ret;
+
+ reg = ep->msix_cap + PCI_MSIX_TABLE;
+ tbl_offset = dw_pcie_readl_dbi(pci, reg);
+ bir = (tbl_offset & PCI_MSIX_TABLE_BIR);
+ tbl_offset &= PCI_MSIX_TABLE_OFFSET;
+ tbl_offset >>= 3;
+
+ reg = PCI_BASE_ADDRESS_0 + (4 * bir);
+ bar_addr_upper = 0;
+ bar_addr_lower = dw_pcie_readl_dbi(pci, reg);
+ reg_u64 = (bar_addr_lower & PCI_BASE_ADDRESS_MEM_TYPE_MASK);
+ if (reg_u64 == PCI_BASE_ADDRESS_MEM_TYPE_64)
+ bar_addr_upper = dw_pcie_readl_dbi(pci, reg + 4);
+
+ tbl_addr = ((u64) bar_addr_upper) << 32 | bar_addr_lower;
+ tbl_addr += (tbl_offset + ((interrupt_num - 1) * PCI_MSIX_ENTRY_SIZE));
+ tbl_addr &= PCI_BASE_ADDRESS_MEM_MASK;
+
+ msix_tbl = ioremap_nocache(ep->phys_base + tbl_addr,
+ PCI_MSIX_ENTRY_SIZE);
+ if (!msix_tbl)
+ return -EINVAL;
+
+ msg_addr_lower = readl(msix_tbl + PCI_MSIX_ENTRY_LOWER_ADDR);
+ msg_addr_upper = readl(msix_tbl + PCI_MSIX_ENTRY_UPPER_ADDR);
+ msg_addr = ((u64) msg_addr_upper) << 32 | msg_addr_lower;
+ msg_data = readl(msix_tbl + PCI_MSIX_ENTRY_DATA);
+ vec_ctrl = readl(msix_tbl + PCI_MSIX_ENTRY_VECTOR_CTRL);
+
+ iounmap(msix_tbl);
+
+ if (vec_ctrl & PCI_MSIX_ENTRY_CTRL_MASKBIT)
+ return -EPERM;
+
+ ret = dw_pcie_ep_map_addr(epc, func_no, ep->msi_mem_phys, msg_addr,
+ epc->mem->page_size);
+ if (ret)
+ return ret;
+
+ writel(msg_data, ep->msi_mem);
+
+ dw_pcie_ep_unmap_addr(epc, func_no, ep->msi_mem_phys);
+
+ return 0;
+}
+
void dw_pcie_ep_exit(struct dw_pcie_ep *ep)
{
struct pci_epc *epc = ep->epc;
@@ -386,15 +545,18 @@ int dw_pcie_ep_init(struct dw_pcie_ep *ep)
return -ENOMEM;
ep->outbound_addr = addr;
- if (ep->ops->ep_init)
- ep->ops->ep_init(ep);
-
epc = devm_pci_epc_create(dev, &epc_ops);
if (IS_ERR(epc)) {
dev_err(dev, "Failed to create epc device\n");
return PTR_ERR(epc);
}
+ ep->epc = epc;
+ epc_set_drvdata(epc, ep);
+
+ if (ep->ops->ep_init)
+ ep->ops->ep_init(ep);
+
ret = of_property_read_u8(np, "max-functions", &epc->max_functions);
if (ret < 0)
epc->max_functions = 1;
@@ -409,15 +571,13 @@ int dw_pcie_ep_init(struct dw_pcie_ep *ep)
ep->msi_mem = pci_epc_mem_alloc_addr(epc, &ep->msi_mem_phys,
epc->mem->page_size);
if (!ep->msi_mem) {
- dev_err(dev, "Failed to reserve memory for MSI\n");
+ dev_err(dev, "Failed to reserve memory for MSI/MSI-X\n");
return -ENOMEM;
}
+ ep->msi_cap = dw_pcie_ep_find_capability(pci, PCI_CAP_ID_MSI);
- epc->features = EPC_FEATURE_NO_LINKUP_NOTIFIER;
- EPC_FEATURE_SET_BAR(epc->features, BAR_0);
+ ep->msix_cap = dw_pcie_ep_find_capability(pci, PCI_CAP_ID_MSIX);
- ep->epc = epc;
- epc_set_drvdata(epc, ep);
dw_pcie_setup(pci);
return 0;
diff --git a/drivers/pci/controller/dwc/pcie-designware-plat.c b/drivers/pci/controller/dwc/pcie-designware-plat.c
index 5937fed4c938..c12bf794d69c 100644
--- a/drivers/pci/controller/dwc/pcie-designware-plat.c
+++ b/drivers/pci/controller/dwc/pcie-designware-plat.c
@@ -70,24 +70,29 @@ static const struct dw_pcie_ops dw_pcie_ops = {
static void dw_plat_pcie_ep_init(struct dw_pcie_ep *ep)
{
struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
+ struct pci_epc *epc = ep->epc;
enum pci_barno bar;
for (bar = BAR_0; bar <= BAR_5; bar++)
dw_pcie_ep_reset_bar(pci, bar);
+
+ epc->features |= EPC_FEATURE_NO_LINKUP_NOTIFIER;
+ epc->features |= EPC_FEATURE_MSIX_AVAILABLE;
}
static int dw_plat_pcie_ep_raise_irq(struct dw_pcie_ep *ep, u8 func_no,
enum pci_epc_irq_type type,
- u8 interrupt_num)
+ u16 interrupt_num)
{
struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
switch (type) {
case PCI_EPC_IRQ_LEGACY:
- dev_err(pci->dev, "EP cannot trigger legacy IRQs\n");
- return -EINVAL;
+ return dw_pcie_ep_raise_legacy_irq(ep, func_no);
case PCI_EPC_IRQ_MSI:
return dw_pcie_ep_raise_msi_irq(ep, func_no, interrupt_num);
+ case PCI_EPC_IRQ_MSIX:
+ return dw_pcie_ep_raise_msix_irq(ep, func_no, interrupt_num);
default:
dev_err(pci->dev, "UNKNOWN IRQ type\n");
}
@@ -118,7 +123,6 @@ static int dw_plat_add_pcie_port(struct dw_plat_pcie *dw_plat_pcie,
return pp->msi_irq;
}
- pp->root_bus_nr = -1;
pp->ops = &dw_plat_pcie_host_ops;
ret = dw_pcie_host_init(pp);
diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h
index bee4e2535a61..96126fd8403c 100644
--- a/drivers/pci/controller/dwc/pcie-designware.h
+++ b/drivers/pci/controller/dwc/pcie-designware.h
@@ -96,17 +96,6 @@
#define PCIE_GET_ATU_INB_UNR_REG_OFFSET(region) \
((0x3 << 20) | ((region) << 9) | (0x1 << 8))
-#define MSI_MESSAGE_CONTROL 0x52
-#define MSI_CAP_MMC_SHIFT 1
-#define MSI_CAP_MMC_MASK (7 << MSI_CAP_MMC_SHIFT)
-#define MSI_CAP_MME_SHIFT 4
-#define MSI_CAP_MSI_EN_MASK 0x1
-#define MSI_CAP_MME_MASK (7 << MSI_CAP_MME_SHIFT)
-#define MSI_MESSAGE_ADDR_L32 0x54
-#define MSI_MESSAGE_ADDR_U32 0x58
-#define MSI_MESSAGE_DATA_32 0x58
-#define MSI_MESSAGE_DATA_64 0x5C
-
#define MAX_MSI_IRQS 256
#define MAX_MSI_IRQS_PER_CTRL 32
#define MAX_MSI_CTRLS (MAX_MSI_IRQS / MAX_MSI_IRQS_PER_CTRL)
@@ -191,7 +180,7 @@ enum dw_pcie_as_type {
struct dw_pcie_ep_ops {
void (*ep_init)(struct dw_pcie_ep *ep);
int (*raise_irq)(struct dw_pcie_ep *ep, u8 func_no,
- enum pci_epc_irq_type type, u8 interrupt_num);
+ enum pci_epc_irq_type type, u16 interrupt_num);
};
struct dw_pcie_ep {
@@ -208,6 +197,8 @@ struct dw_pcie_ep {
u32 num_ob_windows;
void __iomem *msi_mem;
phys_addr_t msi_mem_phys;
+ u8 msi_cap; /* MSI capability offset */
+ u8 msix_cap; /* MSI-X capability offset */
};
struct dw_pcie_ops {
@@ -357,8 +348,11 @@ static inline int dw_pcie_allocate_domains(struct pcie_port *pp)
void dw_pcie_ep_linkup(struct dw_pcie_ep *ep);
int dw_pcie_ep_init(struct dw_pcie_ep *ep);
void dw_pcie_ep_exit(struct dw_pcie_ep *ep);
+int dw_pcie_ep_raise_legacy_irq(struct dw_pcie_ep *ep, u8 func_no);
int dw_pcie_ep_raise_msi_irq(struct dw_pcie_ep *ep, u8 func_no,
u8 interrupt_num);
+int dw_pcie_ep_raise_msix_irq(struct dw_pcie_ep *ep, u8 func_no,
+ u16 interrupt_num);
void dw_pcie_ep_reset_bar(struct dw_pcie *pci, enum pci_barno bar);
#else
static inline void dw_pcie_ep_linkup(struct dw_pcie_ep *ep)
@@ -374,12 +368,23 @@ static inline void dw_pcie_ep_exit(struct dw_pcie_ep *ep)
{
}
+static inline int dw_pcie_ep_raise_legacy_irq(struct dw_pcie_ep *ep, u8 func_no)
+{
+ return 0;
+}
+
static inline int dw_pcie_ep_raise_msi_irq(struct dw_pcie_ep *ep, u8 func_no,
u8 interrupt_num)
{
return 0;
}
+static inline int dw_pcie_ep_raise_msix_irq(struct dw_pcie_ep *ep, u8 func_no,
+ u16 interrupt_num)
+{
+ return 0;
+}
+
static inline void dw_pcie_ep_reset_bar(struct dw_pcie *pci, enum pci_barno bar)
{
}
diff --git a/drivers/pci/controller/dwc/pcie-histb.c b/drivers/pci/controller/dwc/pcie-histb.c
index 3611d6ce9a92..7b32e619b959 100644
--- a/drivers/pci/controller/dwc/pcie-histb.c
+++ b/drivers/pci/controller/dwc/pcie-histb.c
@@ -420,7 +420,6 @@ static int histb_pcie_probe(struct platform_device *pdev)
phy_init(hipcie->phy);
}
- pp->root_bus_nr = -1;
pp->ops = &histb_pcie_host_ops;
platform_set_drvdata(pdev, hipcie);
diff --git a/drivers/pci/controller/dwc/pcie-kirin.c b/drivers/pci/controller/dwc/pcie-kirin.c
index d2970a009eb5..5352e0c3be82 100644
--- a/drivers/pci/controller/dwc/pcie-kirin.c
+++ b/drivers/pci/controller/dwc/pcie-kirin.c
@@ -430,6 +430,9 @@ static int kirin_pcie_host_init(struct pcie_port *pp)
{
kirin_pcie_establish_link(pp);
+ if (IS_ENABLED(CONFIG_PCI_MSI))
+ dw_pcie_msi_init(pp);
+
return 0;
}
@@ -445,9 +448,34 @@ static const struct dw_pcie_host_ops kirin_pcie_host_ops = {
.host_init = kirin_pcie_host_init,
};
+static int kirin_pcie_add_msi(struct dw_pcie *pci,
+ struct platform_device *pdev)
+{
+ int irq;
+
+ if (IS_ENABLED(CONFIG_PCI_MSI)) {
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0) {
+ dev_err(&pdev->dev,
+ "failed to get MSI IRQ (%d)\n", irq);
+ return irq;
+ }
+
+ pci->pp.msi_irq = irq;
+ }
+
+ return 0;
+}
+
static int __init kirin_add_pcie_port(struct dw_pcie *pci,
struct platform_device *pdev)
{
+ int ret;
+
+ ret = kirin_pcie_add_msi(pci, pdev);
+ if (ret)
+ return ret;
+
pci->pp.ops = &kirin_pcie_host_ops;
return dw_pcie_host_init(&pci->pp);
diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
index a1d0198081a6..4352c1cb926d 100644
--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -1251,7 +1251,6 @@ static int qcom_pcie_probe(struct platform_device *pdev)
if (ret)
return ret;
- pp->root_bus_nr = -1;
pp->ops = &qcom_pcie_dw_ops;
if (IS_ENABLED(CONFIG_PCI_MSI)) {
diff --git a/drivers/pci/controller/dwc/pcie-spear13xx.c b/drivers/pci/controller/dwc/pcie-spear13xx.c
index ecb58f7b7566..7d0cdfd8138b 100644
--- a/drivers/pci/controller/dwc/pcie-spear13xx.c
+++ b/drivers/pci/controller/dwc/pcie-spear13xx.c
@@ -210,7 +210,6 @@ static int spear13xx_add_pcie_port(struct spear13xx_pcie *spear13xx_pcie,
return ret;
}
- pp->root_bus_nr = -1;
pp->ops = &spear13xx_pcie_host_ops;
ret = dw_pcie_host_init(pp);
diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c
index 0fae816fba39..6b4555ff2548 100644
--- a/drivers/pci/controller/pci-aardvark.c
+++ b/drivers/pci/controller/pci-aardvark.c
@@ -111,24 +111,6 @@
#define PCIE_MSI_MASK_REG (CONTROL_BASE_ADDR + 0x5C)
#define PCIE_MSI_PAYLOAD_REG (CONTROL_BASE_ADDR + 0x9C)
-/* PCIe window configuration */
-#define OB_WIN_BASE_ADDR 0x4c00
-#define OB_WIN_BLOCK_SIZE 0x20
-#define OB_WIN_REG_ADDR(win, offset) (OB_WIN_BASE_ADDR + \
- OB_WIN_BLOCK_SIZE * (win) + \
- (offset))
-#define OB_WIN_MATCH_LS(win) OB_WIN_REG_ADDR(win, 0x00)
-#define OB_WIN_MATCH_MS(win) OB_WIN_REG_ADDR(win, 0x04)
-#define OB_WIN_REMAP_LS(win) OB_WIN_REG_ADDR(win, 0x08)
-#define OB_WIN_REMAP_MS(win) OB_WIN_REG_ADDR(win, 0x0c)
-#define OB_WIN_MASK_LS(win) OB_WIN_REG_ADDR(win, 0x10)
-#define OB_WIN_MASK_MS(win) OB_WIN_REG_ADDR(win, 0x14)
-#define OB_WIN_ACTIONS(win) OB_WIN_REG_ADDR(win, 0x18)
-
-/* PCIe window types */
-#define OB_PCIE_MEM 0x0
-#define OB_PCIE_IO 0x4
-
/* LMI registers base address and register offsets */
#define LMI_BASE_ADDR 0x6000
#define CFG_REG (LMI_BASE_ADDR + 0x0)
@@ -247,34 +229,9 @@ static int advk_pcie_wait_for_link(struct advk_pcie *pcie)
return -ETIMEDOUT;
}
-/*
- * Set PCIe address window register which could be used for memory
- * mapping.
- */
-static void advk_pcie_set_ob_win(struct advk_pcie *pcie,
- u32 win_num, u32 match_ms,
- u32 match_ls, u32 mask_ms,
- u32 mask_ls, u32 remap_ms,
- u32 remap_ls, u32 action)
-{
- advk_writel(pcie, match_ls, OB_WIN_MATCH_LS(win_num));
- advk_writel(pcie, match_ms, OB_WIN_MATCH_MS(win_num));
- advk_writel(pcie, mask_ms, OB_WIN_MASK_MS(win_num));
- advk_writel(pcie, mask_ls, OB_WIN_MASK_LS(win_num));
- advk_writel(pcie, remap_ms, OB_WIN_REMAP_MS(win_num));
- advk_writel(pcie, remap_ls, OB_WIN_REMAP_LS(win_num));
- advk_writel(pcie, action, OB_WIN_ACTIONS(win_num));
- advk_writel(pcie, match_ls | BIT(0), OB_WIN_MATCH_LS(win_num));
-}
-
static void advk_pcie_setup_hw(struct advk_pcie *pcie)
{
u32 reg;
- int i;
-
- /* Point PCIe unit MBUS decode windows to DRAM space */
- for (i = 0; i < 8; i++)
- advk_pcie_set_ob_win(pcie, i, 0, 0, 0, 0, 0, 0, 0);
/* Set to Direct mode */
reg = advk_readl(pcie, CTRL_CONFIG_REG);
@@ -433,6 +390,15 @@ static int advk_pcie_wait_pio(struct advk_pcie *pcie)
return -ETIMEDOUT;
}
+static bool advk_pcie_valid_device(struct advk_pcie *pcie, struct pci_bus *bus,
+ int devfn)
+{
+ if ((bus->number == pcie->root_bus_nr) && PCI_SLOT(devfn) != 0)
+ return false;
+
+ return true;
+}
+
static int advk_pcie_rd_conf(struct pci_bus *bus, u32 devfn,
int where, int size, u32 *val)
{
@@ -440,7 +406,7 @@ static int advk_pcie_rd_conf(struct pci_bus *bus, u32 devfn,
u32 reg;
int ret;
- if ((bus->number == pcie->root_bus_nr) && PCI_SLOT(devfn) != 0) {
+ if (!advk_pcie_valid_device(pcie, bus, devfn)) {
*val = 0xffffffff;
return PCIBIOS_DEVICE_NOT_FOUND;
}
@@ -494,7 +460,7 @@ static int advk_pcie_wr_conf(struct pci_bus *bus, u32 devfn,
int offset;
int ret;
- if ((bus->number == pcie->root_bus_nr) && PCI_SLOT(devfn) != 0)
+ if (!advk_pcie_valid_device(pcie, bus, devfn))
return PCIBIOS_DEVICE_NOT_FOUND;
if (where % size)
@@ -843,12 +809,6 @@ static int advk_pcie_parse_request_of_pci_ranges(struct advk_pcie *pcie)
switch (resource_type(res)) {
case IORESOURCE_IO:
- advk_pcie_set_ob_win(pcie, 1,
- upper_32_bits(res->start),
- lower_32_bits(res->start),
- 0, 0xF8000000, 0,
- lower_32_bits(res->start),
- OB_PCIE_IO);
err = devm_pci_remap_iospace(dev, res, iobase);
if (err) {
dev_warn(dev, "error %d: failed to map resource %pR\n",
@@ -857,12 +817,6 @@ static int advk_pcie_parse_request_of_pci_ranges(struct advk_pcie *pcie)
}
break;
case IORESOURCE_MEM:
- advk_pcie_set_ob_win(pcie, 0,
- upper_32_bits(res->start),
- lower_32_bits(res->start),
- 0x0, 0xF8000000, 0,
- lower_32_bits(res->start),
- (2 << 20) | OB_PCIE_MEM);
res_valid |= !(res->flags & IORESOURCE_PREFETCH);
break;
case IORESOURCE_BUS:
@@ -889,7 +843,6 @@ static int advk_pcie_probe(struct platform_device *pdev)
struct device *dev = &pdev->dev;
struct advk_pcie *pcie;
struct resource *res;
- struct pci_bus *bus, *child;
struct pci_host_bridge *bridge;
int ret, irq;
@@ -943,21 +896,13 @@ static int advk_pcie_probe(struct platform_device *pdev)
bridge->map_irq = of_irq_parse_and_map_pci;
bridge->swizzle_irq = pci_common_swizzle;
- ret = pci_scan_root_bus_bridge(bridge);
+ ret = pci_host_probe(bridge);
if (ret < 0) {
advk_pcie_remove_msi_irq_domain(pcie);
advk_pcie_remove_irq_domain(pcie);
return ret;
}
- bus = bridge->bus;
-
- pci_bus_assign_resources(bus);
-
- list_for_each_entry(child, &bus->children, node)
- pcie_bus_configure_settings(child);
-
- pci_bus_add_devices(bus);
return 0;
}
diff --git a/drivers/pci/controller/pci-hyperv.c b/drivers/pci/controller/pci-hyperv.c
index d4d4a55f09f8..c00f82cc54aa 100644
--- a/drivers/pci/controller/pci-hyperv.c
+++ b/drivers/pci/controller/pci-hyperv.c
@@ -1546,7 +1546,7 @@ static struct hv_pci_dev *new_pcichild_device(struct hv_pcibus_device *hbus,
unsigned long flags;
int ret;
- hpdev = kzalloc(sizeof(*hpdev), GFP_ATOMIC);
+ hpdev = kzalloc(sizeof(*hpdev), GFP_KERNEL);
if (!hpdev)
return NULL;
diff --git a/drivers/pci/controller/pci-mvebu.c b/drivers/pci/controller/pci-mvebu.c
index 23e270839e6a..50eb0729385b 100644
--- a/drivers/pci/controller/pci-mvebu.c
+++ b/drivers/pci/controller/pci-mvebu.c
@@ -125,6 +125,7 @@ struct mvebu_pcie {
struct platform_device *pdev;
struct mvebu_pcie_port *ports;
struct msi_controller *msi;
+ struct list_head resources;
struct resource io;
struct resource realio;
struct resource mem;
@@ -800,7 +801,7 @@ static struct mvebu_pcie_port *mvebu_pcie_find_port(struct mvebu_pcie *pcie,
static int mvebu_pcie_wr_conf(struct pci_bus *bus, u32 devfn,
int where, int size, u32 val)
{
- struct mvebu_pcie *pcie = sys_to_pcie(bus->sysdata);
+ struct mvebu_pcie *pcie = bus->sysdata;
struct mvebu_pcie_port *port;
int ret;
@@ -826,7 +827,7 @@ static int mvebu_pcie_wr_conf(struct pci_bus *bus, u32 devfn,
static int mvebu_pcie_rd_conf(struct pci_bus *bus, u32 devfn, int where,
int size, u32 *val)
{
- struct mvebu_pcie *pcie = sys_to_pcie(bus->sysdata);
+ struct mvebu_pcie *pcie = bus->sysdata;
struct mvebu_pcie_port *port;
int ret;
@@ -857,36 +858,6 @@ static struct pci_ops mvebu_pcie_ops = {
.write = mvebu_pcie_wr_conf,
};
-static int mvebu_pcie_setup(int nr, struct pci_sys_data *sys)
-{
- struct mvebu_pcie *pcie = sys_to_pcie(sys);
- int err, i;
-
- pcie->mem.name = "PCI MEM";
- pcie->realio.name = "PCI I/O";
-
- if (resource_size(&pcie->realio) != 0)
- pci_add_resource_offset(&sys->resources, &pcie->realio,
- sys->io_offset);
-
- pci_add_resource_offset(&sys->resources, &pcie->mem, sys->mem_offset);
- pci_add_resource(&sys->resources, &pcie->busn);
-
- err = devm_request_pci_bus_resources(&pcie->pdev->dev, &sys->resources);
- if (err)
- return 0;
-
- for (i = 0; i < pcie->nports; i++) {
- struct mvebu_pcie_port *port = &pcie->ports[i];
-
- if (!port->base)
- continue;
- mvebu_pcie_setup_hw(port);
- }
-
- return 1;
-}
-
static resource_size_t mvebu_pcie_align_resource(struct pci_dev *dev,
const struct resource *res,
resource_size_t start,
@@ -917,31 +888,6 @@ static resource_size_t mvebu_pcie_align_resource(struct pci_dev *dev,
return start;
}
-static void mvebu_pcie_enable(struct mvebu_pcie *pcie)
-{
- struct hw_pci hw;
-
- memset(&hw, 0, sizeof(hw));
-
-#ifdef CONFIG_PCI_MSI
- hw.msi_ctrl = pcie->msi;
-#endif
-
- hw.nr_controllers = 1;
- hw.private_data = (void **)&pcie;
- hw.setup = mvebu_pcie_setup;
- hw.map_irq = of_irq_parse_and_map_pci;
- hw.ops = &mvebu_pcie_ops;
- hw.align_resource = mvebu_pcie_align_resource;
-
- pci_common_init_dev(&pcie->pdev->dev, &hw);
-}
-
-/*
- * Looks up the list of register addresses encoded into the reg =
- * <...> property for one that matches the given port/lane. Once
- * found, maps it.
- */
static void __iomem *mvebu_pcie_map_registers(struct platform_device *pdev,
struct device_node *np,
struct mvebu_pcie_port *port)
@@ -1190,46 +1136,79 @@ static void mvebu_pcie_powerdown(struct mvebu_pcie_port *port)
clk_disable_unprepare(port->clk);
}
-static int mvebu_pcie_probe(struct platform_device *pdev)
+/*
+ * We can't use devm_of_pci_get_host_bridge_resources() because we
+ * need to parse our special DT properties encoding the MEM and IO
+ * apertures.
+ */
+static int mvebu_pcie_parse_request_resources(struct mvebu_pcie *pcie)
{
- struct device *dev = &pdev->dev;
- struct mvebu_pcie *pcie;
+ struct device *dev = &pcie->pdev->dev;
struct device_node *np = dev->of_node;
- struct device_node *child;
- int num, i, ret;
+ unsigned int i;
+ int ret;
- pcie = devm_kzalloc(dev, sizeof(*pcie), GFP_KERNEL);
- if (!pcie)
- return -ENOMEM;
+ INIT_LIST_HEAD(&pcie->resources);
- pcie->pdev = pdev;
- platform_set_drvdata(pdev, pcie);
+ /* Get the bus range */
+ ret = of_pci_parse_bus_range(np, &pcie->busn);
+ if (ret) {
+ dev_err(dev, "failed to parse bus-range property: %d\n", ret);
+ return ret;
+ }
+ pci_add_resource(&pcie->resources, &pcie->busn);
- /* Get the PCIe memory and I/O aperture */
+ /* Get the PCIe memory aperture */
mvebu_mbus_get_pcie_mem_aperture(&pcie->mem);
if (resource_size(&pcie->mem) == 0) {
dev_err(dev, "invalid memory aperture size\n");
return -EINVAL;
}
+ pcie->mem.name = "PCI MEM";
+ pci_add_resource(&pcie->resources, &pcie->mem);
+
+ /* Get the PCIe IO aperture */
mvebu_mbus_get_pcie_io_aperture(&pcie->io);
if (resource_size(&pcie->io) != 0) {
pcie->realio.flags = pcie->io.flags;
pcie->realio.start = PCIBIOS_MIN_IO;
pcie->realio.end = min_t(resource_size_t,
- IO_SPACE_LIMIT,
- resource_size(&pcie->io));
- } else
- pcie->realio = pcie->io;
+ IO_SPACE_LIMIT - SZ_64K,
+ resource_size(&pcie->io) - 1);
+ pcie->realio.name = "PCI I/O";
- /* Get the bus range */
- ret = of_pci_parse_bus_range(np, &pcie->busn);
- if (ret) {
- dev_err(dev, "failed to parse bus-range property: %d\n", ret);
- return ret;
+ for (i = 0; i < resource_size(&pcie->realio); i += SZ_64K)
+ pci_ioremap_io(i, pcie->io.start + i);
+
+ pci_add_resource(&pcie->resources, &pcie->realio);
}
+ return devm_request_pci_bus_resources(dev, &pcie->resources);
+}
+
+static int mvebu_pcie_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct mvebu_pcie *pcie;
+ struct pci_host_bridge *bridge;
+ struct device_node *np = dev->of_node;
+ struct device_node *child;
+ int num, i, ret;
+
+ bridge = devm_pci_alloc_host_bridge(dev, sizeof(struct mvebu_pcie));
+ if (!bridge)
+ return -ENOMEM;
+
+ pcie = pci_host_bridge_priv(bridge);
+ pcie->pdev = pdev;
+ platform_set_drvdata(pdev, pcie);
+
+ ret = mvebu_pcie_parse_request_resources(pcie);
+ if (ret)
+ return ret;
+
num = of_get_available_child_count(np);
pcie->ports = devm_kcalloc(dev, num, sizeof(*pcie->ports), GFP_KERNEL);
@@ -1272,20 +1251,24 @@ static int mvebu_pcie_probe(struct platform_device *pdev)
continue;
}
+ mvebu_pcie_setup_hw(port);
mvebu_pcie_set_local_dev_nr(port, 1);
mvebu_sw_pci_bridge_init(port);
}
pcie->nports = i;
- for (i = 0; i < (IO_SPACE_LIMIT - SZ_64K); i += SZ_64K)
- pci_ioremap_io(i, pcie->io.start + i);
-
- mvebu_pcie_enable(pcie);
-
- platform_set_drvdata(pdev, pcie);
-
- return 0;
+ list_splice_init(&pcie->resources, &bridge->windows);
+ bridge->dev.parent = dev;
+ bridge->sysdata = pcie;
+ bridge->busnr = 0;
+ bridge->ops = &mvebu_pcie_ops;
+ bridge->map_irq = of_irq_parse_and_map_pci;
+ bridge->swizzle_irq = pci_common_swizzle;
+ bridge->align_resource = mvebu_pcie_align_resource;
+ bridge->msi = pcie->msi;
+
+ return pci_host_probe(bridge);
}
static const struct of_device_id mvebu_pcie_of_match_table[] = {
diff --git a/drivers/pci/controller/pcie-cadence-ep.c b/drivers/pci/controller/pcie-cadence-ep.c
index e3fe4124e3af..9e87dd7f9ac3 100644
--- a/drivers/pci/controller/pcie-cadence-ep.c
+++ b/drivers/pci/controller/pcie-cadence-ep.c
@@ -238,7 +238,7 @@ static int cdns_pcie_ep_get_msi(struct pci_epc *epc, u8 fn)
struct cdns_pcie_ep *ep = epc_get_drvdata(epc);
struct cdns_pcie *pcie = &ep->pcie;
u32 cap = CDNS_PCIE_EP_FUNC_MSI_CAP_OFFSET;
- u16 flags, mmc, mme;
+ u16 flags, mme;
/* Validate that the MSI feature is actually enabled. */
flags = cdns_pcie_ep_fn_readw(pcie, fn, cap + PCI_MSI_FLAGS);
@@ -249,7 +249,6 @@ static int cdns_pcie_ep_get_msi(struct pci_epc *epc, u8 fn)
* Get the Multiple Message Enable bitfield from the Message Control
* register.
*/
- mmc = (flags & PCI_MSI_FLAGS_QMASK) >> 1;
mme = (flags & PCI_MSI_FLAGS_QSIZE) >> 4;
return mme;
@@ -363,7 +362,8 @@ static int cdns_pcie_ep_send_msi_irq(struct cdns_pcie_ep *ep, u8 fn,
}
static int cdns_pcie_ep_raise_irq(struct pci_epc *epc, u8 fn,
- enum pci_epc_irq_type type, u8 interrupt_num)
+ enum pci_epc_irq_type type,
+ u16 interrupt_num)
{
struct cdns_pcie_ep *ep = epc_get_drvdata(epc);
@@ -439,6 +439,7 @@ static int cdns_pcie_ep_probe(struct platform_device *pdev)
struct pci_epc *epc;
struct resource *res;
int ret;
+ int phy_count;
ep = devm_kzalloc(dev, sizeof(*ep), GFP_KERNEL);
if (!ep)
@@ -473,6 +474,12 @@ static int cdns_pcie_ep_probe(struct platform_device *pdev)
if (!ep->ob_addr)
return -ENOMEM;
+ ret = cdns_pcie_init_phy(dev, pcie);
+ if (ret) {
+ dev_err(dev, "failed to init phy\n");
+ return ret;
+ }
+ platform_set_drvdata(pdev, pcie);
pm_runtime_enable(dev);
ret = pm_runtime_get_sync(dev);
if (ret < 0) {
@@ -521,6 +528,10 @@ static int cdns_pcie_ep_probe(struct platform_device *pdev)
err_get_sync:
pm_runtime_disable(dev);
+ cdns_pcie_disable_phy(pcie);
+ phy_count = pcie->phy_count;
+ while (phy_count--)
+ device_link_del(pcie->link[phy_count]);
return ret;
}
@@ -528,6 +539,7 @@ static int cdns_pcie_ep_probe(struct platform_device *pdev)
static void cdns_pcie_ep_shutdown(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
+ struct cdns_pcie *pcie = dev_get_drvdata(dev);
int ret;
ret = pm_runtime_put_sync(dev);
@@ -536,13 +548,14 @@ static void cdns_pcie_ep_shutdown(struct platform_device *pdev)
pm_runtime_disable(dev);
- /* The PCIe controller can't be disabled. */
+ cdns_pcie_disable_phy(pcie);
}
static struct platform_driver cdns_pcie_ep_driver = {
.driver = {
.name = "cdns-pcie-ep",
.of_match_table = cdns_pcie_ep_of_match,
+ .pm = &cdns_pcie_pm_ops,
},
.probe = cdns_pcie_ep_probe,
.shutdown = cdns_pcie_ep_shutdown,
diff --git a/drivers/pci/controller/pcie-cadence-host.c b/drivers/pci/controller/pcie-cadence-host.c
index a4ebbd37b553..ec394f6a19c8 100644
--- a/drivers/pci/controller/pcie-cadence-host.c
+++ b/drivers/pci/controller/pcie-cadence-host.c
@@ -58,6 +58,11 @@ static void __iomem *cdns_pci_map_bus(struct pci_bus *bus, unsigned int devfn,
return pcie->reg_base + (where & 0xfff);
}
+ /* Check that the link is up */
+ if (!(cdns_pcie_readl(pcie, CDNS_PCIE_LM_BASE) & 0x1))
+ return NULL;
+ /* Clear AXI link-down status */
+ cdns_pcie_writel(pcie, CDNS_PCIE_AT_LINKDOWN, 0x0);
/* Update Output registers for AXI region 0. */
addr0 = CDNS_PCIE_AT_OB_REGION_PCI_ADDR0_NBITS(12) |
@@ -239,6 +244,7 @@ static int cdns_pcie_host_probe(struct platform_device *pdev)
struct cdns_pcie *pcie;
struct resource *res;
int ret;
+ int phy_count;
bridge = devm_pci_alloc_host_bridge(dev, sizeof(*rc));
if (!bridge)
@@ -290,6 +296,13 @@ static int cdns_pcie_host_probe(struct platform_device *pdev)
}
pcie->mem_res = res;
+ ret = cdns_pcie_init_phy(dev, pcie);
+ if (ret) {
+ dev_err(dev, "failed to init phy\n");
+ return ret;
+ }
+ platform_set_drvdata(pdev, pcie);
+
pm_runtime_enable(dev);
ret = pm_runtime_get_sync(dev);
if (ret < 0) {
@@ -322,15 +335,35 @@ static int cdns_pcie_host_probe(struct platform_device *pdev)
err_get_sync:
pm_runtime_disable(dev);
+ cdns_pcie_disable_phy(pcie);
+ phy_count = pcie->phy_count;
+ while (phy_count--)
+ device_link_del(pcie->link[phy_count]);
return ret;
}
+static void cdns_pcie_shutdown(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct cdns_pcie *pcie = dev_get_drvdata(dev);
+ int ret;
+
+ ret = pm_runtime_put_sync(dev);
+ if (ret < 0)
+ dev_dbg(dev, "pm_runtime_put_sync failed\n");
+
+ pm_runtime_disable(dev);
+ cdns_pcie_disable_phy(pcie);
+}
+
static struct platform_driver cdns_pcie_host_driver = {
.driver = {
.name = "cdns-pcie-host",
.of_match_table = cdns_pcie_host_of_match,
+ .pm = &cdns_pcie_pm_ops,
},
.probe = cdns_pcie_host_probe,
+ .shutdown = cdns_pcie_shutdown,
};
builtin_platform_driver(cdns_pcie_host_driver);
diff --git a/drivers/pci/controller/pcie-cadence.c b/drivers/pci/controller/pcie-cadence.c
index 138d113eb45d..86f1b002c846 100644
--- a/drivers/pci/controller/pcie-cadence.c
+++ b/drivers/pci/controller/pcie-cadence.c
@@ -124,3 +124,126 @@ void cdns_pcie_reset_outbound_region(struct cdns_pcie *pcie, u32 r)
cdns_pcie_writel(pcie, CDNS_PCIE_AT_OB_REGION_CPU_ADDR0(r), 0);
cdns_pcie_writel(pcie, CDNS_PCIE_AT_OB_REGION_CPU_ADDR1(r), 0);
}
+
+void cdns_pcie_disable_phy(struct cdns_pcie *pcie)
+{
+ int i = pcie->phy_count;
+
+ while (i--) {
+ phy_power_off(pcie->phy[i]);
+ phy_exit(pcie->phy[i]);
+ }
+}
+
+int cdns_pcie_enable_phy(struct cdns_pcie *pcie)
+{
+ int ret;
+ int i;
+
+ for (i = 0; i < pcie->phy_count; i++) {
+ ret = phy_init(pcie->phy[i]);
+ if (ret < 0)
+ goto err_phy;
+
+ ret = phy_power_on(pcie->phy[i]);
+ if (ret < 0) {
+ phy_exit(pcie->phy[i]);
+ goto err_phy;
+ }
+ }
+
+ return 0;
+
+err_phy:
+ while (--i >= 0) {
+ phy_power_off(pcie->phy[i]);
+ phy_exit(pcie->phy[i]);
+ }
+
+ return ret;
+}
+
+int cdns_pcie_init_phy(struct device *dev, struct cdns_pcie *pcie)
+{
+ struct device_node *np = dev->of_node;
+ int phy_count;
+ struct phy **phy;
+ struct device_link **link;
+ int i;
+ int ret;
+ const char *name;
+
+ phy_count = of_property_count_strings(np, "phy-names");
+ if (phy_count < 1) {
+ dev_err(dev, "no phy-names. PHY will not be initialized\n");
+ pcie->phy_count = 0;
+ return 0;
+ }
+
+ phy = devm_kzalloc(dev, sizeof(*phy) * phy_count, GFP_KERNEL);
+ if (!phy)
+ return -ENOMEM;
+
+ link = devm_kzalloc(dev, sizeof(*link) * phy_count, GFP_KERNEL);
+ if (!link)
+ return -ENOMEM;
+
+ for (i = 0; i < phy_count; i++) {
+ of_property_read_string_index(np, "phy-names", i, &name);
+ phy[i] = devm_phy_optional_get(dev, name);
+ if (IS_ERR(phy))
+ return PTR_ERR(phy);
+
+ link[i] = device_link_add(dev, &phy[i]->dev, DL_FLAG_STATELESS);
+ if (!link[i]) {
+ ret = -EINVAL;
+ goto err_link;
+ }
+ }
+
+ pcie->phy_count = phy_count;
+ pcie->phy = phy;
+ pcie->link = link;
+
+ ret = cdns_pcie_enable_phy(pcie);
+ if (ret)
+ goto err_link;
+
+ return 0;
+
+err_link:
+ while (--i >= 0)
+ device_link_del(link[i]);
+
+ return ret;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int cdns_pcie_suspend_noirq(struct device *dev)
+{
+ struct cdns_pcie *pcie = dev_get_drvdata(dev);
+
+ cdns_pcie_disable_phy(pcie);
+
+ return 0;
+}
+
+static int cdns_pcie_resume_noirq(struct device *dev)
+{
+ struct cdns_pcie *pcie = dev_get_drvdata(dev);
+ int ret;
+
+ ret = cdns_pcie_enable_phy(pcie);
+ if (ret) {
+ dev_err(dev, "failed to enable phy\n");
+ return ret;
+ }
+
+ return 0;
+}
+#endif
+
+const struct dev_pm_ops cdns_pcie_pm_ops = {
+ SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(cdns_pcie_suspend_noirq,
+ cdns_pcie_resume_noirq)
+};
diff --git a/drivers/pci/controller/pcie-cadence.h b/drivers/pci/controller/pcie-cadence.h
index 4bb27333b05c..ae6bf2a2b3d3 100644
--- a/drivers/pci/controller/pcie-cadence.h
+++ b/drivers/pci/controller/pcie-cadence.h
@@ -8,6 +8,7 @@
#include <linux/kernel.h>
#include <linux/pci.h>
+#include <linux/phy/phy.h>
/*
* Local Management Registers
@@ -165,6 +166,9 @@
#define CDNS_PCIE_AT_IB_RP_BAR_ADDR1(bar) \
(CDNS_PCIE_AT_BASE + 0x0804 + (bar) * 0x0008)
+/* AXI link down register */
+#define CDNS_PCIE_AT_LINKDOWN (CDNS_PCIE_AT_BASE + 0x0824)
+
enum cdns_pcie_rp_bar {
RP_BAR0,
RP_BAR1,
@@ -229,6 +233,9 @@ struct cdns_pcie {
struct resource *mem_res;
bool is_rc;
u8 bus;
+ int phy_count;
+ struct phy **phy;
+ struct device_link **link;
};
/* Register access */
@@ -279,7 +286,7 @@ static inline void cdns_pcie_ep_fn_writew(struct cdns_pcie *pcie, u8 fn,
}
static inline void cdns_pcie_ep_fn_writel(struct cdns_pcie *pcie, u8 fn,
- u32 reg, u16 value)
+ u32 reg, u32 value)
{
writel(value, pcie->reg_base + CDNS_PCIE_EP_FUNC_BASE(fn) + reg);
}
@@ -307,5 +314,9 @@ void cdns_pcie_set_outbound_region_for_normal_msg(struct cdns_pcie *pcie, u8 fn,
u32 r, u64 cpu_addr);
void cdns_pcie_reset_outbound_region(struct cdns_pcie *pcie, u32 r);
+void cdns_pcie_disable_phy(struct cdns_pcie *pcie);
+int cdns_pcie_enable_phy(struct cdns_pcie *pcie);
+int cdns_pcie_init_phy(struct device *dev, struct cdns_pcie *pcie);
+extern const struct dev_pm_ops cdns_pcie_pm_ops;
#endif /* _PCIE_CADENCE_H */
diff --git a/drivers/pci/controller/pcie-iproc.c b/drivers/pci/controller/pcie-iproc.c
index 3c76c5fa4f32..3160e9342a2f 100644
--- a/drivers/pci/controller/pcie-iproc.c
+++ b/drivers/pci/controller/pcie-iproc.c
@@ -85,6 +85,8 @@
#define IMAP_VALID_SHIFT 0
#define IMAP_VALID BIT(IMAP_VALID_SHIFT)
+#define IPROC_PCI_PM_CAP 0x48
+#define IPROC_PCI_PM_CAP_MASK 0xffff
#define IPROC_PCI_EXP_CAP 0xac
#define IPROC_PCIE_REG_INVALID 0xffff
@@ -375,6 +377,17 @@ static const u16 iproc_pcie_reg_paxc_v2[] = {
[IPROC_PCIE_CFG_DATA] = 0x1fc,
};
+/*
+ * List of device IDs of controllers that have corrupted capability list that
+ * require SW fixup
+ */
+static const u16 iproc_pcie_corrupt_cap_did[] = {
+ 0x16cd,
+ 0x16f0,
+ 0xd802,
+ 0xd804
+};
+
static inline struct iproc_pcie *iproc_data(struct pci_bus *bus)
{
struct iproc_pcie *pcie = bus->sysdata;
@@ -495,6 +508,49 @@ static unsigned int iproc_pcie_cfg_retry(void __iomem *cfg_data_p)
return data;
}
+static void iproc_pcie_fix_cap(struct iproc_pcie *pcie, int where, u32 *val)
+{
+ u32 i, dev_id;
+
+ switch (where & ~0x3) {
+ case PCI_VENDOR_ID:
+ dev_id = *val >> 16;
+
+ /*
+ * Activate fixup for those controllers that have corrupted
+ * capability list registers
+ */
+ for (i = 0; i < ARRAY_SIZE(iproc_pcie_corrupt_cap_did); i++)
+ if (dev_id == iproc_pcie_corrupt_cap_did[i])
+ pcie->fix_paxc_cap = true;
+ break;
+
+ case IPROC_PCI_PM_CAP:
+ if (pcie->fix_paxc_cap) {
+ /* advertise PM, force next capability to PCIe */
+ *val &= ~IPROC_PCI_PM_CAP_MASK;
+ *val |= IPROC_PCI_EXP_CAP << 8 | PCI_CAP_ID_PM;
+ }
+ break;
+
+ case IPROC_PCI_EXP_CAP:
+ if (pcie->fix_paxc_cap) {
+ /* advertise root port, version 2, terminate here */
+ *val = (PCI_EXP_TYPE_ROOT_PORT << 4 | 2) << 16 |
+ PCI_CAP_ID_EXP;
+ }
+ break;
+
+ case IPROC_PCI_EXP_CAP + PCI_EXP_RTCTL:
+ /* Don't advertise CRS SV support */
+ *val &= ~(PCI_EXP_RTCAP_CRSVIS << 16);
+ break;
+
+ default:
+ break;
+ }
+}
+
static int iproc_pcie_config_read(struct pci_bus *bus, unsigned int devfn,
int where, int size, u32 *val)
{
@@ -509,13 +565,10 @@ static int iproc_pcie_config_read(struct pci_bus *bus, unsigned int devfn,
/* root complex access */
if (busno == 0) {
ret = pci_generic_config_read32(bus, devfn, where, size, val);
- if (ret != PCIBIOS_SUCCESSFUL)
- return ret;
+ if (ret == PCIBIOS_SUCCESSFUL)
+ iproc_pcie_fix_cap(pcie, where, val);
- /* Don't advertise CRS SV support */
- if ((where & ~0x3) == IPROC_PCI_EXP_CAP + PCI_EXP_RTCTL)
- *val &= ~(PCI_EXP_RTCAP_CRSVIS << 16);
- return PCIBIOS_SUCCESSFUL;
+ return ret;
}
cfg_data_p = iproc_pcie_map_ep_cfg_reg(pcie, busno, slot, fn, where);
@@ -529,6 +582,25 @@ static int iproc_pcie_config_read(struct pci_bus *bus, unsigned int devfn,
if (size <= 2)
*val = (data >> (8 * (where & 3))) & ((1 << (size * 8)) - 1);
+ /*
+ * For PAXC and PAXCv2, the total number of PFs that one can enumerate
+ * depends on the firmware configuration. Unfortunately, due to an ASIC
+ * bug, unconfigured PFs cannot be properly hidden from the root
+ * complex. As a result, write access to these PFs will cause bus lock
+ * up on the embedded processor
+ *
+ * Since all unconfigured PFs are left with an incorrect, staled device
+ * ID of 0x168e (PCI_DEVICE_ID_NX2_57810), we try to catch those access
+ * early here and reject them all
+ */
+#define DEVICE_ID_MASK 0xffff0000
+#define DEVICE_ID_SHIFT 16
+ if (pcie->rej_unconfig_pf &&
+ (where & CFG_ADDR_REG_NUM_MASK) == PCI_VENDOR_ID)
+ if ((*val & DEVICE_ID_MASK) ==
+ (PCI_DEVICE_ID_NX2_57810 << DEVICE_ID_SHIFT))
+ return PCIBIOS_FUNC_NOT_SUPPORTED;
+
return PCIBIOS_SUCCESSFUL;
}
@@ -628,7 +700,7 @@ static int iproc_pcie_config_read32(struct pci_bus *bus, unsigned int devfn,
struct iproc_pcie *pcie = iproc_data(bus);
iproc_pcie_apb_err_disable(bus, true);
- if (pcie->type == IPROC_PCIE_PAXB_V2)
+ if (pcie->iproc_cfg_read)
ret = iproc_pcie_config_read(bus, devfn, where, size, val);
else
ret = pci_generic_config_read32(bus, devfn, where, size, val);
@@ -808,14 +880,14 @@ static inline int iproc_pcie_ob_write(struct iproc_pcie *pcie, int window_idx,
writel(lower_32_bits(pci_addr), pcie->base + omap_offset);
writel(upper_32_bits(pci_addr), pcie->base + omap_offset + 4);
- dev_info(dev, "ob window [%d]: offset 0x%x axi %pap pci %pap\n",
- window_idx, oarr_offset, &axi_addr, &pci_addr);
- dev_info(dev, "oarr lo 0x%x oarr hi 0x%x\n",
- readl(pcie->base + oarr_offset),
- readl(pcie->base + oarr_offset + 4));
- dev_info(dev, "omap lo 0x%x omap hi 0x%x\n",
- readl(pcie->base + omap_offset),
- readl(pcie->base + omap_offset + 4));
+ dev_dbg(dev, "ob window [%d]: offset 0x%x axi %pap pci %pap\n",
+ window_idx, oarr_offset, &axi_addr, &pci_addr);
+ dev_dbg(dev, "oarr lo 0x%x oarr hi 0x%x\n",
+ readl(pcie->base + oarr_offset),
+ readl(pcie->base + oarr_offset + 4));
+ dev_dbg(dev, "omap lo 0x%x omap hi 0x%x\n",
+ readl(pcie->base + omap_offset),
+ readl(pcie->base + omap_offset + 4));
return 0;
}
@@ -982,8 +1054,8 @@ static int iproc_pcie_ib_write(struct iproc_pcie *pcie, int region_idx,
iproc_pcie_reg_is_invalid(imap_offset))
return -EINVAL;
- dev_info(dev, "ib region [%d]: offset 0x%x axi %pap pci %pap\n",
- region_idx, iarr_offset, &axi_addr, &pci_addr);
+ dev_dbg(dev, "ib region [%d]: offset 0x%x axi %pap pci %pap\n",
+ region_idx, iarr_offset, &axi_addr, &pci_addr);
/*
* Program the IARR registers. The upper 32-bit IARR register is
@@ -993,9 +1065,9 @@ static int iproc_pcie_ib_write(struct iproc_pcie *pcie, int region_idx,
pcie->base + iarr_offset);
writel(upper_32_bits(pci_addr), pcie->base + iarr_offset + 4);
- dev_info(dev, "iarr lo 0x%x iarr hi 0x%x\n",
- readl(pcie->base + iarr_offset),
- readl(pcie->base + iarr_offset + 4));
+ dev_dbg(dev, "iarr lo 0x%x iarr hi 0x%x\n",
+ readl(pcie->base + iarr_offset),
+ readl(pcie->base + iarr_offset + 4));
/*
* Now program the IMAP registers. Each IARR region may have one or
@@ -1009,10 +1081,10 @@ static int iproc_pcie_ib_write(struct iproc_pcie *pcie, int region_idx,
writel(upper_32_bits(axi_addr),
pcie->base + imap_offset + ib_map->imap_addr_offset);
- dev_info(dev, "imap window [%d] lo 0x%x hi 0x%x\n",
- window_idx, readl(pcie->base + imap_offset),
- readl(pcie->base + imap_offset +
- ib_map->imap_addr_offset));
+ dev_dbg(dev, "imap window [%d] lo 0x%x hi 0x%x\n",
+ window_idx, readl(pcie->base + imap_offset),
+ readl(pcie->base + imap_offset +
+ ib_map->imap_addr_offset));
imap_offset += ib_map->imap_window_offset;
axi_addr += size;
@@ -1144,10 +1216,22 @@ static int iproc_pcie_paxb_v2_msi_steer(struct iproc_pcie *pcie, u64 msi_addr)
return ret;
}
-static void iproc_pcie_paxc_v2_msi_steer(struct iproc_pcie *pcie, u64 msi_addr)
+static void iproc_pcie_paxc_v2_msi_steer(struct iproc_pcie *pcie, u64 msi_addr,
+ bool enable)
{
u32 val;
+ if (!enable) {
+ /*
+ * Disable PAXC MSI steering. All write transfers will be
+ * treated as non-MSI transfers
+ */
+ val = iproc_pcie_read_reg(pcie, IPROC_PCIE_MSI_EN_CFG);
+ val &= ~MSI_ENABLE_CFG;
+ iproc_pcie_write_reg(pcie, IPROC_PCIE_MSI_EN_CFG, val);
+ return;
+ }
+
/*
* Program bits [43:13] of address of GITS_TRANSLATER register into
* bits [30:0] of the MSI base address register. In fact, in all iProc
@@ -1201,7 +1285,7 @@ static int iproc_pcie_msi_steer(struct iproc_pcie *pcie,
return ret;
break;
case IPROC_PCIE_PAXC_V2:
- iproc_pcie_paxc_v2_msi_steer(pcie, msi_addr);
+ iproc_pcie_paxc_v2_msi_steer(pcie, msi_addr, true);
break;
default:
return -EINVAL;
@@ -1271,6 +1355,7 @@ static int iproc_pcie_rev_init(struct iproc_pcie *pcie)
break;
case IPROC_PCIE_PAXB:
regs = iproc_pcie_reg_paxb;
+ pcie->iproc_cfg_read = true;
pcie->has_apb_err_disable = true;
if (pcie->need_ob_cfg) {
pcie->ob_map = paxb_ob_map;
@@ -1293,10 +1378,14 @@ static int iproc_pcie_rev_init(struct iproc_pcie *pcie)
case IPROC_PCIE_PAXC:
regs = iproc_pcie_reg_paxc;
pcie->ep_is_internal = true;
+ pcie->iproc_cfg_read = true;
+ pcie->rej_unconfig_pf = true;
break;
case IPROC_PCIE_PAXC_V2:
regs = iproc_pcie_reg_paxc_v2;
pcie->ep_is_internal = true;
+ pcie->iproc_cfg_read = true;
+ pcie->rej_unconfig_pf = true;
pcie->need_msi_steer = true;
break;
default:
@@ -1427,6 +1516,24 @@ int iproc_pcie_remove(struct iproc_pcie *pcie)
}
EXPORT_SYMBOL(iproc_pcie_remove);
+/*
+ * The MSI parsing logic in certain revisions of Broadcom PAXC based root
+ * complex does not work and needs to be disabled
+ */
+static void quirk_paxc_disable_msi_parsing(struct pci_dev *pdev)
+{
+ struct iproc_pcie *pcie = iproc_data(pdev->bus);
+
+ if (pdev->hdr_type == PCI_HEADER_TYPE_BRIDGE)
+ iproc_pcie_paxc_v2_msi_steer(pcie, 0, false);
+}
+DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_BROADCOM, 0x16f0,
+ quirk_paxc_disable_msi_parsing);
+DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_BROADCOM, 0xd802,
+ quirk_paxc_disable_msi_parsing);
+DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_BROADCOM, 0xd804,
+ quirk_paxc_disable_msi_parsing);
+
MODULE_AUTHOR("Ray Jui <rjui@broadcom.com>");
MODULE_DESCRIPTION("Broadcom iPROC PCIe common driver");
MODULE_LICENSE("GPL v2");
diff --git a/drivers/pci/controller/pcie-iproc.h b/drivers/pci/controller/pcie-iproc.h
index 814b600b383a..4f03ea539805 100644
--- a/drivers/pci/controller/pcie-iproc.h
+++ b/drivers/pci/controller/pcie-iproc.h
@@ -58,8 +58,13 @@ struct iproc_msi;
* @phy: optional PHY device that controls the Serdes
* @map_irq: function callback to map interrupts
* @ep_is_internal: indicates an internal emulated endpoint device is connected
+ * @iproc_cfg_read: indicates the iProc config read function should be used
+ * @rej_unconfig_pf: indicates the root complex needs to detect and reject
+ * enumeration against unconfigured physical functions emulated in the ASIC
* @has_apb_err_disable: indicates the controller can be configured to prevent
* unsupported request from being forwarded as an APB bus error
+ * @fix_paxc_cap: indicates the controller has corrupted capability list in its
+ * config space registers and requires SW based fixup
*
* @need_ob_cfg: indicates SW needs to configure the outbound mapping window
* @ob: outbound mapping related parameters
@@ -84,7 +89,10 @@ struct iproc_pcie {
struct phy *phy;
int (*map_irq)(const struct pci_dev *, u8, u8);
bool ep_is_internal;
+ bool iproc_cfg_read;
+ bool rej_unconfig_pf;
bool has_apb_err_disable;
+ bool fix_paxc_cap;
bool need_ob_cfg;
struct iproc_pcie_ob ob;
diff --git a/drivers/pci/controller/pcie-mobiveil.c b/drivers/pci/controller/pcie-mobiveil.c
index cf0aa7cee5b0..a939e8d31735 100644
--- a/drivers/pci/controller/pcie-mobiveil.c
+++ b/drivers/pci/controller/pcie-mobiveil.c
@@ -23,6 +23,8 @@
#include <linux/platform_device.h>
#include <linux/slab.h>
+#include "../pci.h"
+
/* register offsets and bit positions */
/*
@@ -130,7 +132,7 @@ struct mobiveil_pcie {
void __iomem *config_axi_slave_base; /* endpoint config base */
void __iomem *csr_axi_slave_base; /* root port config base */
void __iomem *apb_csr_base; /* MSI register base */
- void __iomem *pcie_reg_base; /* Physical PCIe Controller Base */
+ phys_addr_t pcie_reg_base; /* Physical PCIe Controller Base */
struct irq_domain *intx_domain;
raw_spinlock_t intx_mask_lock;
int irq;
diff --git a/drivers/pci/controller/pcie-rockchip-ep.c b/drivers/pci/controller/pcie-rockchip-ep.c
index 6beba8ed7b84..b8163c56a142 100644
--- a/drivers/pci/controller/pcie-rockchip-ep.c
+++ b/drivers/pci/controller/pcie-rockchip-ep.c
@@ -472,7 +472,7 @@ static int rockchip_pcie_ep_send_msi_irq(struct rockchip_pcie_ep *ep, u8 fn,
static int rockchip_pcie_ep_raise_irq(struct pci_epc *epc, u8 fn,
enum pci_epc_irq_type type,
- u8 interrupt_num)
+ u16 interrupt_num)
{
struct rockchip_pcie_ep *ep = epc_get_drvdata(epc);
diff --git a/drivers/pci/controller/vmd.c b/drivers/pci/controller/vmd.c
index 942b64fc7f1f..fd2dbd7eed7b 100644
--- a/drivers/pci/controller/vmd.c
+++ b/drivers/pci/controller/vmd.c
@@ -197,9 +197,20 @@ static struct vmd_irq_list *vmd_next_irq(struct vmd_dev *vmd, struct msi_desc *d
int i, best = 1;
unsigned long flags;
- if (pci_is_bridge(msi_desc_to_pci_dev(desc)) || vmd->msix_count == 1)
+ if (vmd->msix_count == 1)
return &vmd->irqs[0];
+ /*
+ * White list for fast-interrupt handlers. All others will share the
+ * "slow" interrupt vector.
+ */
+ switch (msi_desc_to_pci_dev(desc)->class) {
+ case PCI_CLASS_STORAGE_EXPRESS:
+ break;
+ default:
+ return &vmd->irqs[0];
+ }
+
raw_spin_lock_irqsave(&list_lock, flags);
for (i = 1; i < vmd->msix_count; i++)
if (vmd->irqs[i].count < vmd->irqs[best].count)
diff --git a/drivers/pci/endpoint/functions/pci-epf-test.c b/drivers/pci/endpoint/functions/pci-epf-test.c
index 63ed706445b9..3e86fa3c7da3 100644
--- a/drivers/pci/endpoint/functions/pci-epf-test.c
+++ b/drivers/pci/endpoint/functions/pci-epf-test.c
@@ -18,13 +18,16 @@
#include <linux/pci-epf.h>
#include <linux/pci_regs.h>
+#define IRQ_TYPE_LEGACY 0
+#define IRQ_TYPE_MSI 1
+#define IRQ_TYPE_MSIX 2
+
#define COMMAND_RAISE_LEGACY_IRQ BIT(0)
#define COMMAND_RAISE_MSI_IRQ BIT(1)
-#define MSI_NUMBER_SHIFT 2
-#define MSI_NUMBER_MASK (0x3f << MSI_NUMBER_SHIFT)
-#define COMMAND_READ BIT(8)
-#define COMMAND_WRITE BIT(9)
-#define COMMAND_COPY BIT(10)
+#define COMMAND_RAISE_MSIX_IRQ BIT(2)
+#define COMMAND_READ BIT(3)
+#define COMMAND_WRITE BIT(4)
+#define COMMAND_COPY BIT(5)
#define STATUS_READ_SUCCESS BIT(0)
#define STATUS_READ_FAIL BIT(1)
@@ -45,6 +48,7 @@ struct pci_epf_test {
struct pci_epf *epf;
enum pci_barno test_reg_bar;
bool linkup_notifier;
+ bool msix_available;
struct delayed_work cmd_handler;
};
@@ -56,6 +60,8 @@ struct pci_epf_test_reg {
u64 dst_addr;
u32 size;
u32 checksum;
+ u32 irq_type;
+ u32 irq_number;
} __packed;
static struct pci_epf_header test_header = {
@@ -244,31 +250,42 @@ err:
return ret;
}
-static void pci_epf_test_raise_irq(struct pci_epf_test *epf_test, u8 irq)
+static void pci_epf_test_raise_irq(struct pci_epf_test *epf_test, u8 irq_type,
+ u16 irq)
{
- u8 msi_count;
struct pci_epf *epf = epf_test->epf;
+ struct device *dev = &epf->dev;
struct pci_epc *epc = epf->epc;
enum pci_barno test_reg_bar = epf_test->test_reg_bar;
struct pci_epf_test_reg *reg = epf_test->reg[test_reg_bar];
reg->status |= STATUS_IRQ_RAISED;
- msi_count = pci_epc_get_msi(epc, epf->func_no);
- if (irq > msi_count || msi_count <= 0)
+
+ switch (irq_type) {
+ case IRQ_TYPE_LEGACY:
pci_epc_raise_irq(epc, epf->func_no, PCI_EPC_IRQ_LEGACY, 0);
- else
+ break;
+ case IRQ_TYPE_MSI:
pci_epc_raise_irq(epc, epf->func_no, PCI_EPC_IRQ_MSI, irq);
+ break;
+ case IRQ_TYPE_MSIX:
+ pci_epc_raise_irq(epc, epf->func_no, PCI_EPC_IRQ_MSIX, irq);
+ break;
+ default:
+ dev_err(dev, "Failed to raise IRQ, unknown type\n");
+ break;
+ }
}
static void pci_epf_test_cmd_handler(struct work_struct *work)
{
int ret;
- u8 irq;
- u8 msi_count;
+ int count;
u32 command;
struct pci_epf_test *epf_test = container_of(work, struct pci_epf_test,
cmd_handler.work);
struct pci_epf *epf = epf_test->epf;
+ struct device *dev = &epf->dev;
struct pci_epc *epc = epf->epc;
enum pci_barno test_reg_bar = epf_test->test_reg_bar;
struct pci_epf_test_reg *reg = epf_test->reg[test_reg_bar];
@@ -280,7 +297,10 @@ static void pci_epf_test_cmd_handler(struct work_struct *work)
reg->command = 0;
reg->status = 0;
- irq = (command & MSI_NUMBER_MASK) >> MSI_NUMBER_SHIFT;
+ if (reg->irq_type > IRQ_TYPE_MSIX) {
+ dev_err(dev, "Failed to detect IRQ type\n");
+ goto reset_handler;
+ }
if (command & COMMAND_RAISE_LEGACY_IRQ) {
reg->status = STATUS_IRQ_RAISED;
@@ -294,7 +314,8 @@ static void pci_epf_test_cmd_handler(struct work_struct *work)
reg->status |= STATUS_WRITE_FAIL;
else
reg->status |= STATUS_WRITE_SUCCESS;
- pci_epf_test_raise_irq(epf_test, irq);
+ pci_epf_test_raise_irq(epf_test, reg->irq_type,
+ reg->irq_number);
goto reset_handler;
}
@@ -304,7 +325,8 @@ static void pci_epf_test_cmd_handler(struct work_struct *work)
reg->status |= STATUS_READ_SUCCESS;
else
reg->status |= STATUS_READ_FAIL;
- pci_epf_test_raise_irq(epf_test, irq);
+ pci_epf_test_raise_irq(epf_test, reg->irq_type,
+ reg->irq_number);
goto reset_handler;
}
@@ -314,16 +336,28 @@ static void pci_epf_test_cmd_handler(struct work_struct *work)
reg->status |= STATUS_COPY_SUCCESS;
else
reg->status |= STATUS_COPY_FAIL;
- pci_epf_test_raise_irq(epf_test, irq);
+ pci_epf_test_raise_irq(epf_test, reg->irq_type,
+ reg->irq_number);
goto reset_handler;
}
if (command & COMMAND_RAISE_MSI_IRQ) {
- msi_count = pci_epc_get_msi(epc, epf->func_no);
- if (irq > msi_count || msi_count <= 0)
+ count = pci_epc_get_msi(epc, epf->func_no);
+ if (reg->irq_number > count || count <= 0)
goto reset_handler;
reg->status = STATUS_IRQ_RAISED;
- pci_epc_raise_irq(epc, epf->func_no, PCI_EPC_IRQ_MSI, irq);
+ pci_epc_raise_irq(epc, epf->func_no, PCI_EPC_IRQ_MSI,
+ reg->irq_number);
+ goto reset_handler;
+ }
+
+ if (command & COMMAND_RAISE_MSIX_IRQ) {
+ count = pci_epc_get_msix(epc, epf->func_no);
+ if (reg->irq_number > count || count <= 0)
+ goto reset_handler;
+ reg->status = STATUS_IRQ_RAISED;
+ pci_epc_raise_irq(epc, epf->func_no, PCI_EPC_IRQ_MSIX,
+ reg->irq_number);
goto reset_handler;
}
@@ -440,6 +474,8 @@ static int pci_epf_test_bind(struct pci_epf *epf)
else
epf_test->linkup_notifier = true;
+ epf_test->msix_available = epc->features & EPC_FEATURE_MSIX_AVAILABLE;
+
epf_test->test_reg_bar = EPC_FEATURE_GET_BAR(epc->features);
ret = pci_epc_write_header(epc, epf->func_no, header);
@@ -457,8 +493,18 @@ static int pci_epf_test_bind(struct pci_epf *epf)
return ret;
ret = pci_epc_set_msi(epc, epf->func_no, epf->msi_interrupts);
- if (ret)
+ if (ret) {
+ dev_err(dev, "MSI configuration failed\n");
return ret;
+ }
+
+ if (epf_test->msix_available) {
+ ret = pci_epc_set_msix(epc, epf->func_no, epf->msix_interrupts);
+ if (ret) {
+ dev_err(dev, "MSI-X configuration failed\n");
+ return ret;
+ }
+ }
if (!epf_test->linkup_notifier)
queue_work(kpcitest_workqueue, &epf_test->cmd_handler.work);
diff --git a/drivers/pci/endpoint/pci-ep-cfs.c b/drivers/pci/endpoint/pci-ep-cfs.c
index 018ea3433cb5..d1288a0bd530 100644
--- a/drivers/pci/endpoint/pci-ep-cfs.c
+++ b/drivers/pci/endpoint/pci-ep-cfs.c
@@ -286,6 +286,28 @@ static ssize_t pci_epf_msi_interrupts_show(struct config_item *item,
to_pci_epf_group(item)->epf->msi_interrupts);
}
+static ssize_t pci_epf_msix_interrupts_store(struct config_item *item,
+ const char *page, size_t len)
+{
+ u16 val;
+ int ret;
+
+ ret = kstrtou16(page, 0, &val);
+ if (ret)
+ return ret;
+
+ to_pci_epf_group(item)->epf->msix_interrupts = val;
+
+ return len;
+}
+
+static ssize_t pci_epf_msix_interrupts_show(struct config_item *item,
+ char *page)
+{
+ return sprintf(page, "%d\n",
+ to_pci_epf_group(item)->epf->msix_interrupts);
+}
+
PCI_EPF_HEADER_R(vendorid)
PCI_EPF_HEADER_W_u16(vendorid)
@@ -327,6 +349,7 @@ CONFIGFS_ATTR(pci_epf_, subsys_vendor_id);
CONFIGFS_ATTR(pci_epf_, subsys_id);
CONFIGFS_ATTR(pci_epf_, interrupt_pin);
CONFIGFS_ATTR(pci_epf_, msi_interrupts);
+CONFIGFS_ATTR(pci_epf_, msix_interrupts);
static struct configfs_attribute *pci_epf_attrs[] = {
&pci_epf_attr_vendorid,
@@ -340,6 +363,7 @@ static struct configfs_attribute *pci_epf_attrs[] = {
&pci_epf_attr_subsys_id,
&pci_epf_attr_interrupt_pin,
&pci_epf_attr_msi_interrupts,
+ &pci_epf_attr_msix_interrupts,
NULL,
};
diff --git a/drivers/pci/endpoint/pci-epc-core.c b/drivers/pci/endpoint/pci-epc-core.c
index b0ee42739c3c..094dcc3203b8 100644
--- a/drivers/pci/endpoint/pci-epc-core.c
+++ b/drivers/pci/endpoint/pci-epc-core.c
@@ -131,13 +131,13 @@ EXPORT_SYMBOL_GPL(pci_epc_start);
* pci_epc_raise_irq() - interrupt the host system
* @epc: the EPC device which has to interrupt the host
* @func_no: the endpoint function number in the EPC device
- * @type: specify the type of interrupt; legacy or MSI
- * @interrupt_num: the MSI interrupt number
+ * @type: specify the type of interrupt; legacy, MSI or MSI-X
+ * @interrupt_num: the MSI or MSI-X interrupt number
*
- * Invoke to raise an MSI or legacy interrupt
+ * Invoke to raise an legacy, MSI or MSI-X interrupt
*/
int pci_epc_raise_irq(struct pci_epc *epc, u8 func_no,
- enum pci_epc_irq_type type, u8 interrupt_num)
+ enum pci_epc_irq_type type, u16 interrupt_num)
{
int ret;
unsigned long flags;
@@ -201,7 +201,8 @@ int pci_epc_set_msi(struct pci_epc *epc, u8 func_no, u8 interrupts)
u8 encode_int;
unsigned long flags;
- if (IS_ERR_OR_NULL(epc) || func_no >= epc->max_functions)
+ if (IS_ERR_OR_NULL(epc) || func_no >= epc->max_functions ||
+ interrupts > 32)
return -EINVAL;
if (!epc->ops->set_msi)
@@ -218,6 +219,63 @@ int pci_epc_set_msi(struct pci_epc *epc, u8 func_no, u8 interrupts)
EXPORT_SYMBOL_GPL(pci_epc_set_msi);
/**
+ * pci_epc_get_msix() - get the number of MSI-X interrupt numbers allocated
+ * @epc: the EPC device to which MSI-X interrupts was requested
+ * @func_no: the endpoint function number in the EPC device
+ *
+ * Invoke to get the number of MSI-X interrupts allocated by the RC
+ */
+int pci_epc_get_msix(struct pci_epc *epc, u8 func_no)
+{
+ int interrupt;
+ unsigned long flags;
+
+ if (IS_ERR_OR_NULL(epc) || func_no >= epc->max_functions)
+ return 0;
+
+ if (!epc->ops->get_msix)
+ return 0;
+
+ spin_lock_irqsave(&epc->lock, flags);
+ interrupt = epc->ops->get_msix(epc, func_no);
+ spin_unlock_irqrestore(&epc->lock, flags);
+
+ if (interrupt < 0)
+ return 0;
+
+ return interrupt + 1;
+}
+EXPORT_SYMBOL_GPL(pci_epc_get_msix);
+
+/**
+ * pci_epc_set_msix() - set the number of MSI-X interrupt numbers required
+ * @epc: the EPC device on which MSI-X has to be configured
+ * @func_no: the endpoint function number in the EPC device
+ * @interrupts: number of MSI-X interrupts required by the EPF
+ *
+ * Invoke to set the required number of MSI-X interrupts.
+ */
+int pci_epc_set_msix(struct pci_epc *epc, u8 func_no, u16 interrupts)
+{
+ int ret;
+ unsigned long flags;
+
+ if (IS_ERR_OR_NULL(epc) || func_no >= epc->max_functions ||
+ interrupts < 1 || interrupts > 2048)
+ return -EINVAL;
+
+ if (!epc->ops->set_msix)
+ return 0;
+
+ spin_lock_irqsave(&epc->lock, flags);
+ ret = epc->ops->set_msix(epc, func_no, interrupts - 1);
+ spin_unlock_irqrestore(&epc->lock, flags);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(pci_epc_set_msix);
+
+/**
* pci_epc_unmap_addr() - unmap CPU address from PCI address
* @epc: the EPC device on which address is allocated
* @func_no: the endpoint function number in the EPC device
diff --git a/drivers/pci/hotplug/acpi_pcihp.c b/drivers/pci/hotplug/acpi_pcihp.c
index 5bd6c1573295..6b7c1ed58e7e 100644
--- a/drivers/pci/hotplug/acpi_pcihp.c
+++ b/drivers/pci/hotplug/acpi_pcihp.c
@@ -74,20 +74,6 @@ int acpi_get_hp_hw_control_from_firmware(struct pci_dev *pdev)
struct acpi_buffer string = { ACPI_ALLOCATE_BUFFER, NULL };
/*
- * Per PCI firmware specification, we should run the ACPI _OSC
- * method to get control of hotplug hardware before using it. If
- * an _OSC is missing, we look for an OSHP to do the same thing.
- * To handle different BIOS behavior, we look for _OSC on a root
- * bridge preferentially (according to PCI fw spec). Later for
- * OSHP within the scope of the hotplug controller and its parents,
- * up to the host bridge under which this controller exists.
- */
- if (shpchp_is_native(pdev))
- return 0;
-
- /* If _OSC exists, we should not evaluate OSHP */
-
- /*
* If there's no ACPI host bridge (i.e., ACPI support is compiled
* into the kernel but the hardware platform doesn't support ACPI),
* there's nothing to do here.
@@ -97,9 +83,25 @@ int acpi_get_hp_hw_control_from_firmware(struct pci_dev *pdev)
if (!root)
return 0;
- if (root->osc_support_set)
- goto no_control;
+ /*
+ * If _OSC exists, it determines whether we're allowed to manage
+ * the SHPC. We executed it while enumerating the host bridge.
+ */
+ if (root->osc_support_set) {
+ if (host->native_shpc_hotplug)
+ return 0;
+ return -ENODEV;
+ }
+ /*
+ * In the absence of _OSC, we're always allowed to manage the SHPC.
+ * However, if an OSHP method is present, we must execute it so the
+ * firmware can transfer control to the OS, e.g., direct interrupts
+ * to the OS instead of to the firmware.
+ *
+ * N.B. The PCI Firmware Spec (r3.2, sec 4.8) does not endorse
+ * searching up the ACPI hierarchy, so the loops below are suspect.
+ */
handle = ACPI_HANDLE(&pdev->dev);
if (!handle) {
/*
@@ -128,7 +130,7 @@ int acpi_get_hp_hw_control_from_firmware(struct pci_dev *pdev)
if (ACPI_FAILURE(status))
break;
}
-no_control:
+
pci_info(pdev, "Cannot get control of SHPC hotplug\n");
kfree(string.pointer);
return -ENODEV;
diff --git a/drivers/pci/hotplug/acpiphp_core.c b/drivers/pci/hotplug/acpiphp_core.c
index 12b5655fd390..ad32ffbc4b91 100644
--- a/drivers/pci/hotplug/acpiphp_core.c
+++ b/drivers/pci/hotplug/acpiphp_core.c
@@ -254,20 +254,6 @@ static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value)
return 0;
}
-/**
- * release_slot - free up the memory used by a slot
- * @hotplug_slot: slot to free
- */
-static void release_slot(struct hotplug_slot *hotplug_slot)
-{
- struct slot *slot = hotplug_slot->private;
-
- pr_debug("%s - physical_slot = %s\n", __func__, slot_name(slot));
-
- kfree(slot->hotplug_slot);
- kfree(slot);
-}
-
/* callback routine to initialize 'struct slot' for each slot */
int acpiphp_register_hotplug_slot(struct acpiphp_slot *acpiphp_slot,
unsigned int sun)
@@ -287,7 +273,6 @@ int acpiphp_register_hotplug_slot(struct acpiphp_slot *acpiphp_slot,
slot->hotplug_slot->info = &slot->info;
slot->hotplug_slot->private = slot;
- slot->hotplug_slot->release = &release_slot;
slot->hotplug_slot->ops = &acpi_hotplug_slot_ops;
slot->acpi_slot = acpiphp_slot;
@@ -324,13 +309,12 @@ error:
void acpiphp_unregister_hotplug_slot(struct acpiphp_slot *acpiphp_slot)
{
struct slot *slot = acpiphp_slot->slot;
- int retval = 0;
pr_info("Slot [%s] unregistered\n", slot_name(slot));
- retval = pci_hp_deregister(slot->hotplug_slot);
- if (retval)
- pr_err("pci_hp_deregister failed with error %d\n", retval);
+ pci_hp_deregister(slot->hotplug_slot);
+ kfree(slot->hotplug_slot);
+ kfree(slot);
}
diff --git a/drivers/pci/hotplug/cpci_hotplug_core.c b/drivers/pci/hotplug/cpci_hotplug_core.c
index 07b533adc9df..52a339baf06c 100644
--- a/drivers/pci/hotplug/cpci_hotplug_core.c
+++ b/drivers/pci/hotplug/cpci_hotplug_core.c
@@ -195,10 +195,8 @@ get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value)
return 0;
}
-static void release_slot(struct hotplug_slot *hotplug_slot)
+static void release_slot(struct slot *slot)
{
- struct slot *slot = hotplug_slot->private;
-
kfree(slot->hotplug_slot->info);
kfree(slot->hotplug_slot);
pci_dev_put(slot->dev);
@@ -253,7 +251,6 @@ cpci_hp_register_bus(struct pci_bus *bus, u8 first, u8 last)
snprintf(name, SLOT_NAME_SIZE, "%02x:%02x", bus->number, i);
hotplug_slot->private = slot;
- hotplug_slot->release = &release_slot;
hotplug_slot->ops = &cpci_hotplug_slot_ops;
/*
@@ -308,12 +305,8 @@ cpci_hp_unregister_bus(struct pci_bus *bus)
slots--;
dbg("deregistering slot %s", slot_name(slot));
- status = pci_hp_deregister(slot->hotplug_slot);
- if (status) {
- err("pci_hp_deregister failed with error %d",
- status);
- break;
- }
+ pci_hp_deregister(slot->hotplug_slot);
+ release_slot(slot);
}
}
up_write(&list_rwsem);
@@ -623,6 +616,7 @@ cleanup_slots(void)
list_for_each_entry_safe(slot, tmp, &slot_list, slot_list) {
list_del(&slot->slot_list);
pci_hp_deregister(slot->hotplug_slot);
+ release_slot(slot);
}
cleanup_null:
up_write(&list_rwsem);
diff --git a/drivers/pci/hotplug/cpqphp_core.c b/drivers/pci/hotplug/cpqphp_core.c
index 1797e36ec586..5a06636e910a 100644
--- a/drivers/pci/hotplug/cpqphp_core.c
+++ b/drivers/pci/hotplug/cpqphp_core.c
@@ -266,17 +266,6 @@ static void __iomem *get_SMBIOS_entry(void __iomem *smbios_start,
return previous;
}
-static void release_slot(struct hotplug_slot *hotplug_slot)
-{
- struct slot *slot = hotplug_slot->private;
-
- dbg("%s - physical_slot = %s\n", __func__, slot_name(slot));
-
- kfree(slot->hotplug_slot->info);
- kfree(slot->hotplug_slot);
- kfree(slot);
-}
-
static int ctrl_slot_cleanup(struct controller *ctrl)
{
struct slot *old_slot, *next_slot;
@@ -285,9 +274,11 @@ static int ctrl_slot_cleanup(struct controller *ctrl)
ctrl->slot = NULL;
while (old_slot) {
- /* memory will be freed by the release_slot callback */
next_slot = old_slot->next;
pci_hp_deregister(old_slot->hotplug_slot);
+ kfree(old_slot->hotplug_slot->info);
+ kfree(old_slot->hotplug_slot);
+ kfree(old_slot);
old_slot = next_slot;
}
@@ -678,7 +669,6 @@ static int ctrl_slot_setup(struct controller *ctrl,
((read_slot_enable(ctrl) << 2) >> ctrl_slot) & 0x04;
/* register this slot with the hotplug pci core */
- hotplug_slot->release = &release_slot;
hotplug_slot->private = slot;
snprintf(name, SLOT_NAME_SIZE, "%u", slot->number);
hotplug_slot->ops = &cpqphp_hotplug_slot_ops;
diff --git a/drivers/pci/hotplug/ibmphp_core.c b/drivers/pci/hotplug/ibmphp_core.c
index 1869b0411ce0..4ea57e9019f1 100644
--- a/drivers/pci/hotplug/ibmphp_core.c
+++ b/drivers/pci/hotplug/ibmphp_core.c
@@ -673,7 +673,20 @@ static void free_slots(void)
list_for_each_entry_safe(slot_cur, next, &ibmphp_slot_head,
ibm_slot_list) {
- pci_hp_deregister(slot_cur->hotplug_slot);
+ pci_hp_del(slot_cur->hotplug_slot);
+ slot_cur->ctrl = NULL;
+ slot_cur->bus_on = NULL;
+
+ /*
+ * We don't want to actually remove the resources,
+ * since ibmphp_free_resources() will do just that.
+ */
+ ibmphp_unconfigure_card(&slot_cur, -1);
+
+ pci_hp_destroy(slot_cur->hotplug_slot);
+ kfree(slot_cur->hotplug_slot->info);
+ kfree(slot_cur->hotplug_slot);
+ kfree(slot_cur);
}
debug("%s -- exit\n", __func__);
}
diff --git a/drivers/pci/hotplug/ibmphp_ebda.c b/drivers/pci/hotplug/ibmphp_ebda.c
index 64549aa24c0f..6f8e90e3ec08 100644
--- a/drivers/pci/hotplug/ibmphp_ebda.c
+++ b/drivers/pci/hotplug/ibmphp_ebda.c
@@ -699,25 +699,6 @@ static int fillslotinfo(struct hotplug_slot *hotplug_slot)
return rc;
}
-static void release_slot(struct hotplug_slot *hotplug_slot)
-{
- struct slot *slot;
-
- if (!hotplug_slot || !hotplug_slot->private)
- return;
-
- slot = hotplug_slot->private;
- kfree(slot->hotplug_slot->info);
- kfree(slot->hotplug_slot);
- slot->ctrl = NULL;
- slot->bus_on = NULL;
-
- /* we don't want to actually remove the resources, since free_resources will do just that */
- ibmphp_unconfigure_card(&slot, -1);
-
- kfree(slot);
-}
-
static struct pci_driver ibmphp_driver;
/*
@@ -941,7 +922,6 @@ static int __init ebda_rsrc_controller(void)
tmp_slot->hotplug_slot = hp_slot_ptr;
hp_slot_ptr->private = tmp_slot;
- hp_slot_ptr->release = release_slot;
rc = fillslotinfo(hp_slot_ptr);
if (rc)
diff --git a/drivers/pci/hotplug/pci_hotplug_core.c b/drivers/pci/hotplug/pci_hotplug_core.c
index af92fed46ab7..90fde5f106d8 100644
--- a/drivers/pci/hotplug/pci_hotplug_core.c
+++ b/drivers/pci/hotplug/pci_hotplug_core.c
@@ -396,8 +396,9 @@ static struct hotplug_slot *get_slot_from_name(const char *name)
* @owner: caller module owner
* @mod_name: caller module name
*
- * Registers a hotplug slot with the pci hotplug subsystem, which will allow
- * userspace interaction to the slot.
+ * Prepares a hotplug slot for in-kernel use and immediately publishes it to
+ * user space in one go. Drivers may alternatively carry out the two steps
+ * separately by invoking pci_hp_initialize() and pci_hp_add().
*
* Returns 0 if successful, anything else for an error.
*/
@@ -406,45 +407,91 @@ int __pci_hp_register(struct hotplug_slot *slot, struct pci_bus *bus,
struct module *owner, const char *mod_name)
{
int result;
+
+ result = __pci_hp_initialize(slot, bus, devnr, name, owner, mod_name);
+ if (result)
+ return result;
+
+ result = pci_hp_add(slot);
+ if (result)
+ pci_hp_destroy(slot);
+
+ return result;
+}
+EXPORT_SYMBOL_GPL(__pci_hp_register);
+
+/**
+ * __pci_hp_initialize - prepare hotplug slot for in-kernel use
+ * @slot: pointer to the &struct hotplug_slot to initialize
+ * @bus: bus this slot is on
+ * @devnr: slot number
+ * @name: name registered with kobject core
+ * @owner: caller module owner
+ * @mod_name: caller module name
+ *
+ * Allocate and fill in a PCI slot for use by a hotplug driver. Once this has
+ * been called, the driver may invoke hotplug_slot_name() to get the slot's
+ * unique name. The driver must be prepared to handle a ->reset_slot callback
+ * from this point on.
+ *
+ * Returns 0 on success or a negative int on error.
+ */
+int __pci_hp_initialize(struct hotplug_slot *slot, struct pci_bus *bus,
+ int devnr, const char *name, struct module *owner,
+ const char *mod_name)
+{
struct pci_slot *pci_slot;
if (slot == NULL)
return -ENODEV;
if ((slot->info == NULL) || (slot->ops == NULL))
return -EINVAL;
- if (slot->release == NULL) {
- dbg("Why are you trying to register a hotplug slot without a proper release function?\n");
- return -EINVAL;
- }
slot->ops->owner = owner;
slot->ops->mod_name = mod_name;
- mutex_lock(&pci_hp_mutex);
/*
* No problems if we call this interface from both ACPI_PCI_SLOT
* driver and call it here again. If we've already created the
* pci_slot, the interface will simply bump the refcount.
*/
pci_slot = pci_create_slot(bus, devnr, name, slot);
- if (IS_ERR(pci_slot)) {
- result = PTR_ERR(pci_slot);
- goto out;
- }
+ if (IS_ERR(pci_slot))
+ return PTR_ERR(pci_slot);
slot->pci_slot = pci_slot;
pci_slot->hotplug = slot;
+ return 0;
+}
+EXPORT_SYMBOL_GPL(__pci_hp_initialize);
- list_add(&slot->slot_list, &pci_hotplug_slot_list);
+/**
+ * pci_hp_add - publish hotplug slot to user space
+ * @slot: pointer to the &struct hotplug_slot to publish
+ *
+ * Make a hotplug slot's sysfs interface available and inform user space of its
+ * addition by sending a uevent. The hotplug driver must be prepared to handle
+ * all &struct hotplug_slot_ops callbacks from this point on.
+ *
+ * Returns 0 on success or a negative int on error.
+ */
+int pci_hp_add(struct hotplug_slot *slot)
+{
+ struct pci_slot *pci_slot = slot->pci_slot;
+ int result;
result = fs_add_slot(pci_slot);
+ if (result)
+ return result;
+
kobject_uevent(&pci_slot->kobj, KOBJ_ADD);
- dbg("Added slot %s to the list\n", name);
-out:
+ mutex_lock(&pci_hp_mutex);
+ list_add(&slot->slot_list, &pci_hotplug_slot_list);
mutex_unlock(&pci_hp_mutex);
- return result;
+ dbg("Added slot %s to the list\n", hotplug_slot_name(slot));
+ return 0;
}
-EXPORT_SYMBOL_GPL(__pci_hp_register);
+EXPORT_SYMBOL_GPL(pci_hp_add);
/**
* pci_hp_deregister - deregister a hotplug_slot with the PCI hotplug subsystem
@@ -455,35 +502,62 @@ EXPORT_SYMBOL_GPL(__pci_hp_register);
*
* Returns 0 if successful, anything else for an error.
*/
-int pci_hp_deregister(struct hotplug_slot *slot)
+void pci_hp_deregister(struct hotplug_slot *slot)
+{
+ pci_hp_del(slot);
+ pci_hp_destroy(slot);
+}
+EXPORT_SYMBOL_GPL(pci_hp_deregister);
+
+/**
+ * pci_hp_del - unpublish hotplug slot from user space
+ * @slot: pointer to the &struct hotplug_slot to unpublish
+ *
+ * Remove a hotplug slot's sysfs interface.
+ *
+ * Returns 0 on success or a negative int on error.
+ */
+void pci_hp_del(struct hotplug_slot *slot)
{
struct hotplug_slot *temp;
- struct pci_slot *pci_slot;
- if (!slot)
- return -ENODEV;
+ if (WARN_ON(!slot))
+ return;
mutex_lock(&pci_hp_mutex);
temp = get_slot_from_name(hotplug_slot_name(slot));
- if (temp != slot) {
+ if (WARN_ON(temp != slot)) {
mutex_unlock(&pci_hp_mutex);
- return -ENODEV;
+ return;
}
list_del(&slot->slot_list);
-
- pci_slot = slot->pci_slot;
- fs_remove_slot(pci_slot);
+ mutex_unlock(&pci_hp_mutex);
dbg("Removed slot %s from the list\n", hotplug_slot_name(slot));
+ fs_remove_slot(slot->pci_slot);
+}
+EXPORT_SYMBOL_GPL(pci_hp_del);
- slot->release(slot);
+/**
+ * pci_hp_destroy - remove hotplug slot from in-kernel use
+ * @slot: pointer to the &struct hotplug_slot to destroy
+ *
+ * Destroy a PCI slot used by a hotplug driver. Once this has been called,
+ * the driver may no longer invoke hotplug_slot_name() to get the slot's
+ * unique name. The driver no longer needs to handle a ->reset_slot callback
+ * from this point on.
+ *
+ * Returns 0 on success or a negative int on error.
+ */
+void pci_hp_destroy(struct hotplug_slot *slot)
+{
+ struct pci_slot *pci_slot = slot->pci_slot;
+
+ slot->pci_slot = NULL;
pci_slot->hotplug = NULL;
pci_destroy_slot(pci_slot);
- mutex_unlock(&pci_hp_mutex);
-
- return 0;
}
-EXPORT_SYMBOL_GPL(pci_hp_deregister);
+EXPORT_SYMBOL_GPL(pci_hp_destroy);
/**
* pci_hp_change_slot_info - changes the slot's information structure in the core
diff --git a/drivers/pci/hotplug/pciehp.h b/drivers/pci/hotplug/pciehp.h
index 5f892065585e..811cf83f956d 100644
--- a/drivers/pci/hotplug/pciehp.h
+++ b/drivers/pci/hotplug/pciehp.h
@@ -21,6 +21,7 @@
#include <linux/delay.h>
#include <linux/sched/signal.h> /* signal_pending() */
#include <linux/mutex.h>
+#include <linux/rwsem.h>
#include <linux/workqueue.h>
#include "../pcie/portdrv.h"
@@ -57,49 +58,111 @@ do { \
dev_warn(&ctrl->pcie->device, format, ## arg)
#define SLOT_NAME_SIZE 10
+
+/**
+ * struct slot - PCIe hotplug slot
+ * @state: current state machine position
+ * @ctrl: pointer to the slot's controller structure
+ * @hotplug_slot: pointer to the structure registered with the PCI hotplug core
+ * @work: work item to turn the slot on or off after 5 seconds in response to
+ * an Attention Button press
+ * @lock: protects reads and writes of @state;
+ * protects scheduling, execution and cancellation of @work
+ */
struct slot {
u8 state;
struct controller *ctrl;
struct hotplug_slot *hotplug_slot;
- struct delayed_work work; /* work for button event */
+ struct delayed_work work;
struct mutex lock;
- struct mutex hotplug_lock;
- struct workqueue_struct *wq;
-};
-
-struct event_info {
- u32 event_type;
- struct slot *p_slot;
- struct work_struct work;
};
+/**
+ * struct controller - PCIe hotplug controller
+ * @ctrl_lock: serializes writes to the Slot Control register
+ * @pcie: pointer to the controller's PCIe port service device
+ * @reset_lock: prevents access to the Data Link Layer Link Active bit in the
+ * Link Status register and to the Presence Detect State bit in the Slot
+ * Status register during a slot reset which may cause them to flap
+ * @slot: pointer to the controller's slot structure
+ * @queue: wait queue to wake up on reception of a Command Completed event,
+ * used for synchronous writes to the Slot Control register
+ * @slot_cap: cached copy of the Slot Capabilities register
+ * @slot_ctrl: cached copy of the Slot Control register
+ * @poll_thread: thread to poll for slot events if no IRQ is available,
+ * enabled with pciehp_poll_mode module parameter
+ * @cmd_started: jiffies when the Slot Control register was last written;
+ * the next write is allowed 1 second later, absent a Command Completed
+ * interrupt (PCIe r4.0, sec 6.7.3.2)
+ * @cmd_busy: flag set on Slot Control register write, cleared by IRQ handler
+ * on reception of a Command Completed event
+ * @link_active_reporting: cached copy of Data Link Layer Link Active Reporting
+ * Capable bit in Link Capabilities register; if this bit is zero, the
+ * Data Link Layer Link Active bit in the Link Status register will never
+ * be set and the driver is thus confined to wait 1 second before assuming
+ * the link to a hotplugged device is up and accessing it
+ * @notification_enabled: whether the IRQ was requested successfully
+ * @power_fault_detected: whether a power fault was detected by the hardware
+ * that has not yet been cleared by the user
+ * @pending_events: used by the IRQ handler to save events retrieved from the
+ * Slot Status register for later consumption by the IRQ thread
+ * @request_result: result of last user request submitted to the IRQ thread
+ * @requester: wait queue to wake up on completion of user request,
+ * used for synchronous slot enable/disable request via sysfs
+ */
struct controller {
- struct mutex ctrl_lock; /* controller lock */
- struct pcie_device *pcie; /* PCI Express port service */
+ struct mutex ctrl_lock;
+ struct pcie_device *pcie;
+ struct rw_semaphore reset_lock;
struct slot *slot;
- wait_queue_head_t queue; /* sleep & wake process */
+ wait_queue_head_t queue;
u32 slot_cap;
u16 slot_ctrl;
- struct timer_list poll_timer;
+ struct task_struct *poll_thread;
unsigned long cmd_started; /* jiffies */
unsigned int cmd_busy:1;
unsigned int link_active_reporting:1;
unsigned int notification_enabled:1;
unsigned int power_fault_detected;
+ atomic_t pending_events;
+ int request_result;
+ wait_queue_head_t requester;
};
-#define INT_PRESENCE_ON 1
-#define INT_PRESENCE_OFF 2
-#define INT_POWER_FAULT 3
-#define INT_BUTTON_PRESS 4
-#define INT_LINK_UP 5
-#define INT_LINK_DOWN 6
-
-#define STATIC_STATE 0
+/**
+ * DOC: Slot state
+ *
+ * @OFF_STATE: slot is powered off, no subordinate devices are enumerated
+ * @BLINKINGON_STATE: slot will be powered on after the 5 second delay,
+ * green led is blinking
+ * @BLINKINGOFF_STATE: slot will be powered off after the 5 second delay,
+ * green led is blinking
+ * @POWERON_STATE: slot is currently powering on
+ * @POWEROFF_STATE: slot is currently powering off
+ * @ON_STATE: slot is powered on, subordinate devices have been enumerated
+ */
+#define OFF_STATE 0
#define BLINKINGON_STATE 1
#define BLINKINGOFF_STATE 2
#define POWERON_STATE 3
#define POWEROFF_STATE 4
+#define ON_STATE 5
+
+/**
+ * DOC: Flags to request an action from the IRQ thread
+ *
+ * These are stored together with events read from the Slot Status register,
+ * hence must be greater than its 16-bit width.
+ *
+ * %DISABLE_SLOT: Disable the slot in response to a user request via sysfs or
+ * an Attention Button press after the 5 second delay
+ * %RERUN_ISR: Used by the IRQ handler to inform the IRQ thread that the
+ * hotplug port was inaccessible when the interrupt occurred, requiring
+ * that the IRQ handler is rerun by the IRQ thread after it has made the
+ * hotplug port accessible by runtime resuming its parents to D0
+ */
+#define DISABLE_SLOT (1 << 16)
+#define RERUN_ISR (1 << 17)
#define ATTN_BUTTN(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_ABP)
#define POWER_CTRL(ctrl) ((ctrl)->slot_cap & PCI_EXP_SLTCAP_PCP)
@@ -113,15 +176,17 @@ struct controller {
int pciehp_sysfs_enable_slot(struct slot *slot);
int pciehp_sysfs_disable_slot(struct slot *slot);
-void pciehp_queue_interrupt_event(struct slot *slot, u32 event_type);
+void pciehp_request(struct controller *ctrl, int action);
+void pciehp_handle_button_press(struct slot *slot);
+void pciehp_handle_disable_request(struct slot *slot);
+void pciehp_handle_presence_or_link_change(struct slot *slot, u32 events);
int pciehp_configure_device(struct slot *p_slot);
-int pciehp_unconfigure_device(struct slot *p_slot);
+void pciehp_unconfigure_device(struct slot *p_slot);
void pciehp_queue_pushbutton_work(struct work_struct *work);
struct controller *pcie_init(struct pcie_device *dev);
int pcie_init_notification(struct controller *ctrl);
-int pciehp_enable_slot(struct slot *p_slot);
-int pciehp_disable_slot(struct slot *p_slot);
-void pcie_reenable_notification(struct controller *ctrl);
+void pcie_shutdown_notification(struct controller *ctrl);
+void pcie_clear_hotplug_events(struct controller *ctrl);
int pciehp_power_on_slot(struct slot *slot);
void pciehp_power_off_slot(struct slot *slot);
void pciehp_get_power_status(struct slot *slot, u8 *status);
diff --git a/drivers/pci/hotplug/pciehp_core.c b/drivers/pci/hotplug/pciehp_core.c
index 44a6a63802d5..ec48c9433ae5 100644
--- a/drivers/pci/hotplug/pciehp_core.c
+++ b/drivers/pci/hotplug/pciehp_core.c
@@ -26,11 +26,12 @@
#include <linux/interrupt.h>
#include <linux/time.h>
+#include "../pci.h"
+
/* Global variables */
bool pciehp_debug;
bool pciehp_poll_mode;
int pciehp_poll_time;
-static bool pciehp_force;
/*
* not really modular, but the easiest way to keep compat with existing
@@ -39,11 +40,9 @@ static bool pciehp_force;
module_param(pciehp_debug, bool, 0644);
module_param(pciehp_poll_mode, bool, 0644);
module_param(pciehp_poll_time, int, 0644);
-module_param(pciehp_force, bool, 0644);
MODULE_PARM_DESC(pciehp_debug, "Debugging mode enabled or not");
MODULE_PARM_DESC(pciehp_poll_mode, "Using polling mechanism for hot-plug events or not");
MODULE_PARM_DESC(pciehp_poll_time, "Polling mechanism frequency, in seconds");
-MODULE_PARM_DESC(pciehp_force, "Force pciehp, even if OSHP is missing");
#define PCIE_MODULE_NAME "pciehp"
@@ -56,17 +55,6 @@ static int get_latch_status(struct hotplug_slot *slot, u8 *value);
static int get_adapter_status(struct hotplug_slot *slot, u8 *value);
static int reset_slot(struct hotplug_slot *slot, int probe);
-/**
- * release_slot - free up the memory used by a slot
- * @hotplug_slot: slot to free
- */
-static void release_slot(struct hotplug_slot *hotplug_slot)
-{
- kfree(hotplug_slot->ops);
- kfree(hotplug_slot->info);
- kfree(hotplug_slot);
-}
-
static int init_slot(struct controller *ctrl)
{
struct slot *slot = ctrl->slot;
@@ -107,15 +95,14 @@ static int init_slot(struct controller *ctrl)
/* register this slot with the hotplug pci core */
hotplug->info = info;
hotplug->private = slot;
- hotplug->release = &release_slot;
hotplug->ops = ops;
slot->hotplug_slot = hotplug;
snprintf(name, SLOT_NAME_SIZE, "%u", PSN(ctrl));
- retval = pci_hp_register(hotplug,
- ctrl->pcie->port->subordinate, 0, name);
+ retval = pci_hp_initialize(hotplug,
+ ctrl->pcie->port->subordinate, 0, name);
if (retval)
- ctrl_err(ctrl, "pci_hp_register failed: error %d\n", retval);
+ ctrl_err(ctrl, "pci_hp_initialize failed: error %d\n", retval);
out:
if (retval) {
kfree(ops);
@@ -127,7 +114,12 @@ out:
static void cleanup_slot(struct controller *ctrl)
{
- pci_hp_deregister(ctrl->slot->hotplug_slot);
+ struct hotplug_slot *hotplug_slot = ctrl->slot->hotplug_slot;
+
+ pci_hp_destroy(hotplug_slot);
+ kfree(hotplug_slot->ops);
+ kfree(hotplug_slot->info);
+ kfree(hotplug_slot);
}
/*
@@ -136,8 +128,11 @@ static void cleanup_slot(struct controller *ctrl)
static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 status)
{
struct slot *slot = hotplug_slot->private;
+ struct pci_dev *pdev = slot->ctrl->pcie->port;
+ pci_config_pm_runtime_get(pdev);
pciehp_set_attention_status(slot, status);
+ pci_config_pm_runtime_put(pdev);
return 0;
}
@@ -160,8 +155,11 @@ static int disable_slot(struct hotplug_slot *hotplug_slot)
static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value)
{
struct slot *slot = hotplug_slot->private;
+ struct pci_dev *pdev = slot->ctrl->pcie->port;
+ pci_config_pm_runtime_get(pdev);
pciehp_get_power_status(slot, value);
+ pci_config_pm_runtime_put(pdev);
return 0;
}
@@ -176,16 +174,22 @@ static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value)
static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value)
{
struct slot *slot = hotplug_slot->private;
+ struct pci_dev *pdev = slot->ctrl->pcie->port;
+ pci_config_pm_runtime_get(pdev);
pciehp_get_latch_status(slot, value);
+ pci_config_pm_runtime_put(pdev);
return 0;
}
static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value)
{
struct slot *slot = hotplug_slot->private;
+ struct pci_dev *pdev = slot->ctrl->pcie->port;
+ pci_config_pm_runtime_get(pdev);
pciehp_get_adapter_status(slot, value);
+ pci_config_pm_runtime_put(pdev);
return 0;
}
@@ -196,12 +200,40 @@ static int reset_slot(struct hotplug_slot *hotplug_slot, int probe)
return pciehp_reset_slot(slot, probe);
}
+/**
+ * pciehp_check_presence() - synthesize event if presence has changed
+ *
+ * On probe and resume, an explicit presence check is necessary to bring up an
+ * occupied slot or bring down an unoccupied slot. This can't be triggered by
+ * events in the Slot Status register, they may be stale and are therefore
+ * cleared. Secondly, sending an interrupt for "events that occur while
+ * interrupt generation is disabled [when] interrupt generation is subsequently
+ * enabled" is optional per PCIe r4.0, sec 6.7.3.4.
+ */
+static void pciehp_check_presence(struct controller *ctrl)
+{
+ struct slot *slot = ctrl->slot;
+ u8 occupied;
+
+ down_read(&ctrl->reset_lock);
+ mutex_lock(&slot->lock);
+
+ pciehp_get_adapter_status(slot, &occupied);
+ if ((occupied && (slot->state == OFF_STATE ||
+ slot->state == BLINKINGON_STATE)) ||
+ (!occupied && (slot->state == ON_STATE ||
+ slot->state == BLINKINGOFF_STATE)))
+ pciehp_request(ctrl, PCI_EXP_SLTSTA_PDC);
+
+ mutex_unlock(&slot->lock);
+ up_read(&ctrl->reset_lock);
+}
+
static int pciehp_probe(struct pcie_device *dev)
{
int rc;
struct controller *ctrl;
struct slot *slot;
- u8 occupied, poweron;
/* If this is not a "hotplug" service, we have no business here. */
if (dev->service != PCIE_PORT_SERVICE_HP)
@@ -238,21 +270,20 @@ static int pciehp_probe(struct pcie_device *dev)
goto err_out_free_ctrl_slot;
}
- /* Check if slot is occupied */
+ /* Publish to user space */
slot = ctrl->slot;
- pciehp_get_adapter_status(slot, &occupied);
- pciehp_get_power_status(slot, &poweron);
- if (occupied && pciehp_force) {
- mutex_lock(&slot->hotplug_lock);
- pciehp_enable_slot(slot);
- mutex_unlock(&slot->hotplug_lock);
+ rc = pci_hp_add(slot->hotplug_slot);
+ if (rc) {
+ ctrl_err(ctrl, "Publication to user space failed (%d)\n", rc);
+ goto err_out_shutdown_notification;
}
- /* If empty slot's power status is on, turn power off */
- if (!occupied && poweron && POWER_CTRL(ctrl))
- pciehp_power_off_slot(slot);
+
+ pciehp_check_presence(ctrl);
return 0;
+err_out_shutdown_notification:
+ pcie_shutdown_notification(ctrl);
err_out_free_ctrl_slot:
cleanup_slot(ctrl);
err_out_release_ctlr:
@@ -264,6 +295,8 @@ static void pciehp_remove(struct pcie_device *dev)
{
struct controller *ctrl = get_service_data(dev);
+ pci_hp_del(ctrl->slot->hotplug_slot);
+ pcie_shutdown_notification(ctrl);
cleanup_slot(ctrl);
pciehp_release_ctrl(ctrl);
}
@@ -274,27 +307,28 @@ static int pciehp_suspend(struct pcie_device *dev)
return 0;
}
-static int pciehp_resume(struct pcie_device *dev)
+static int pciehp_resume_noirq(struct pcie_device *dev)
{
- struct controller *ctrl;
- struct slot *slot;
- u8 status;
+ struct controller *ctrl = get_service_data(dev);
+ struct slot *slot = ctrl->slot;
- ctrl = get_service_data(dev);
+ /* pci_restore_state() just wrote to the Slot Control register */
+ ctrl->cmd_started = jiffies;
+ ctrl->cmd_busy = true;
- /* reinitialize the chipset's event detection logic */
- pcie_reenable_notification(ctrl);
+ /* clear spurious events from rediscovery of inserted card */
+ if (slot->state == ON_STATE || slot->state == BLINKINGOFF_STATE)
+ pcie_clear_hotplug_events(ctrl);
- slot = ctrl->slot;
+ return 0;
+}
+
+static int pciehp_resume(struct pcie_device *dev)
+{
+ struct controller *ctrl = get_service_data(dev);
+
+ pciehp_check_presence(ctrl);
- /* Check if slot is occupied */
- pciehp_get_adapter_status(slot, &status);
- mutex_lock(&slot->hotplug_lock);
- if (status)
- pciehp_enable_slot(slot);
- else
- pciehp_disable_slot(slot);
- mutex_unlock(&slot->hotplug_lock);
return 0;
}
#endif /* PM */
@@ -309,6 +343,7 @@ static struct pcie_port_service_driver hpdriver_portdrv = {
#ifdef CONFIG_PM
.suspend = pciehp_suspend,
+ .resume_noirq = pciehp_resume_noirq,
.resume = pciehp_resume,
#endif /* PM */
};
diff --git a/drivers/pci/hotplug/pciehp_ctrl.c b/drivers/pci/hotplug/pciehp_ctrl.c
index c684faa43387..da7c72372ffc 100644
--- a/drivers/pci/hotplug/pciehp_ctrl.c
+++ b/drivers/pci/hotplug/pciehp_ctrl.c
@@ -17,28 +17,11 @@
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/slab.h>
+#include <linux/pm_runtime.h>
#include <linux/pci.h>
#include "../pci.h"
#include "pciehp.h"
-static void interrupt_event_handler(struct work_struct *work);
-
-void pciehp_queue_interrupt_event(struct slot *p_slot, u32 event_type)
-{
- struct event_info *info;
-
- info = kmalloc(sizeof(*info), GFP_ATOMIC);
- if (!info) {
- ctrl_err(p_slot->ctrl, "dropped event %d (ENOMEM)\n", event_type);
- return;
- }
-
- INIT_WORK(&info->work, interrupt_event_handler);
- info->event_type = event_type;
- info->p_slot = p_slot;
- queue_work(p_slot->wq, &info->work);
-}
-
/* The following routines constitute the bulk of the
hotplug controller logic
*/
@@ -119,14 +102,11 @@ err_exit:
* remove_board - Turns off slot and LEDs
* @p_slot: slot where board is being removed
*/
-static int remove_board(struct slot *p_slot)
+static void remove_board(struct slot *p_slot)
{
- int retval;
struct controller *ctrl = p_slot->ctrl;
- retval = pciehp_unconfigure_device(p_slot);
- if (retval)
- return retval;
+ pciehp_unconfigure_device(p_slot);
if (POWER_CTRL(ctrl)) {
pciehp_power_off_slot(p_slot);
@@ -141,86 +121,30 @@ static int remove_board(struct slot *p_slot)
/* turn off Green LED */
pciehp_green_led_off(p_slot);
- return 0;
}
-struct power_work_info {
- struct slot *p_slot;
- struct work_struct work;
- unsigned int req;
-#define DISABLE_REQ 0
-#define ENABLE_REQ 1
-};
-
-/**
- * pciehp_power_thread - handle pushbutton events
- * @work: &struct work_struct describing work to be done
- *
- * Scheduled procedure to handle blocking stuff for the pushbuttons.
- * Handles all pending events and exits.
- */
-static void pciehp_power_thread(struct work_struct *work)
-{
- struct power_work_info *info =
- container_of(work, struct power_work_info, work);
- struct slot *p_slot = info->p_slot;
- int ret;
-
- switch (info->req) {
- case DISABLE_REQ:
- mutex_lock(&p_slot->hotplug_lock);
- pciehp_disable_slot(p_slot);
- mutex_unlock(&p_slot->hotplug_lock);
- mutex_lock(&p_slot->lock);
- p_slot->state = STATIC_STATE;
- mutex_unlock(&p_slot->lock);
- break;
- case ENABLE_REQ:
- mutex_lock(&p_slot->hotplug_lock);
- ret = pciehp_enable_slot(p_slot);
- mutex_unlock(&p_slot->hotplug_lock);
- if (ret)
- pciehp_green_led_off(p_slot);
- mutex_lock(&p_slot->lock);
- p_slot->state = STATIC_STATE;
- mutex_unlock(&p_slot->lock);
- break;
- default:
- break;
- }
-
- kfree(info);
-}
+static int pciehp_enable_slot(struct slot *slot);
+static int pciehp_disable_slot(struct slot *slot);
-static void pciehp_queue_power_work(struct slot *p_slot, int req)
+void pciehp_request(struct controller *ctrl, int action)
{
- struct power_work_info *info;
-
- p_slot->state = (req == ENABLE_REQ) ? POWERON_STATE : POWEROFF_STATE;
-
- info = kmalloc(sizeof(*info), GFP_KERNEL);
- if (!info) {
- ctrl_err(p_slot->ctrl, "no memory to queue %s request\n",
- (req == ENABLE_REQ) ? "poweron" : "poweroff");
- return;
- }
- info->p_slot = p_slot;
- INIT_WORK(&info->work, pciehp_power_thread);
- info->req = req;
- queue_work(p_slot->wq, &info->work);
+ atomic_or(action, &ctrl->pending_events);
+ if (!pciehp_poll_mode)
+ irq_wake_thread(ctrl->pcie->irq, ctrl);
}
void pciehp_queue_pushbutton_work(struct work_struct *work)
{
struct slot *p_slot = container_of(work, struct slot, work.work);
+ struct controller *ctrl = p_slot->ctrl;
mutex_lock(&p_slot->lock);
switch (p_slot->state) {
case BLINKINGOFF_STATE:
- pciehp_queue_power_work(p_slot, DISABLE_REQ);
+ pciehp_request(ctrl, DISABLE_SLOT);
break;
case BLINKINGON_STATE:
- pciehp_queue_power_work(p_slot, ENABLE_REQ);
+ pciehp_request(ctrl, PCI_EXP_SLTSTA_PDC);
break;
default:
break;
@@ -228,18 +152,15 @@ void pciehp_queue_pushbutton_work(struct work_struct *work)
mutex_unlock(&p_slot->lock);
}
-/*
- * Note: This function must be called with slot->lock held
- */
-static void handle_button_press_event(struct slot *p_slot)
+void pciehp_handle_button_press(struct slot *p_slot)
{
struct controller *ctrl = p_slot->ctrl;
- u8 getstatus;
+ mutex_lock(&p_slot->lock);
switch (p_slot->state) {
- case STATIC_STATE:
- pciehp_get_power_status(p_slot, &getstatus);
- if (getstatus) {
+ case OFF_STATE:
+ case ON_STATE:
+ if (p_slot->state == ON_STATE) {
p_slot->state = BLINKINGOFF_STATE;
ctrl_info(ctrl, "Slot(%s): Powering off due to button press\n",
slot_name(p_slot));
@@ -251,7 +172,7 @@ static void handle_button_press_event(struct slot *p_slot)
/* blink green LED and turn off amber */
pciehp_green_led_blink(p_slot);
pciehp_set_attention_status(p_slot, 0);
- queue_delayed_work(p_slot->wq, &p_slot->work, 5*HZ);
+ schedule_delayed_work(&p_slot->work, 5 * HZ);
break;
case BLINKINGOFF_STATE:
case BLINKINGON_STATE:
@@ -262,118 +183,104 @@ static void handle_button_press_event(struct slot *p_slot)
*/
ctrl_info(ctrl, "Slot(%s): Button cancel\n", slot_name(p_slot));
cancel_delayed_work(&p_slot->work);
- if (p_slot->state == BLINKINGOFF_STATE)
+ if (p_slot->state == BLINKINGOFF_STATE) {
+ p_slot->state = ON_STATE;
pciehp_green_led_on(p_slot);
- else
+ } else {
+ p_slot->state = OFF_STATE;
pciehp_green_led_off(p_slot);
+ }
pciehp_set_attention_status(p_slot, 0);
ctrl_info(ctrl, "Slot(%s): Action canceled due to button press\n",
slot_name(p_slot));
- p_slot->state = STATIC_STATE;
- break;
- case POWEROFF_STATE:
- case POWERON_STATE:
- /*
- * Ignore if the slot is on power-on or power-off state;
- * this means that the previous attention button action
- * to hot-add or hot-remove is undergoing
- */
- ctrl_info(ctrl, "Slot(%s): Button ignored\n",
- slot_name(p_slot));
break;
default:
ctrl_err(ctrl, "Slot(%s): Ignoring invalid state %#x\n",
slot_name(p_slot), p_slot->state);
break;
}
+ mutex_unlock(&p_slot->lock);
}
-/*
- * Note: This function must be called with slot->lock held
- */
-static void handle_link_event(struct slot *p_slot, u32 event)
+void pciehp_handle_disable_request(struct slot *slot)
{
- struct controller *ctrl = p_slot->ctrl;
+ struct controller *ctrl = slot->ctrl;
- switch (p_slot->state) {
+ mutex_lock(&slot->lock);
+ switch (slot->state) {
case BLINKINGON_STATE:
case BLINKINGOFF_STATE:
- cancel_delayed_work(&p_slot->work);
- /* Fall through */
- case STATIC_STATE:
- pciehp_queue_power_work(p_slot, event == INT_LINK_UP ?
- ENABLE_REQ : DISABLE_REQ);
- break;
- case POWERON_STATE:
- if (event == INT_LINK_UP) {
- ctrl_info(ctrl, "Slot(%s): Link Up event ignored; already powering on\n",
- slot_name(p_slot));
- } else {
- ctrl_info(ctrl, "Slot(%s): Link Down event queued; currently getting powered on\n",
- slot_name(p_slot));
- pciehp_queue_power_work(p_slot, DISABLE_REQ);
- }
- break;
- case POWEROFF_STATE:
- if (event == INT_LINK_UP) {
- ctrl_info(ctrl, "Slot(%s): Link Up event queued; currently getting powered off\n",
- slot_name(p_slot));
- pciehp_queue_power_work(p_slot, ENABLE_REQ);
- } else {
- ctrl_info(ctrl, "Slot(%s): Link Down event ignored; already powering off\n",
- slot_name(p_slot));
- }
- break;
- default:
- ctrl_err(ctrl, "Slot(%s): Ignoring invalid state %#x\n",
- slot_name(p_slot), p_slot->state);
+ cancel_delayed_work(&slot->work);
break;
}
+ slot->state = POWEROFF_STATE;
+ mutex_unlock(&slot->lock);
+
+ ctrl->request_result = pciehp_disable_slot(slot);
}
-static void interrupt_event_handler(struct work_struct *work)
+void pciehp_handle_presence_or_link_change(struct slot *slot, u32 events)
{
- struct event_info *info = container_of(work, struct event_info, work);
- struct slot *p_slot = info->p_slot;
- struct controller *ctrl = p_slot->ctrl;
-
- mutex_lock(&p_slot->lock);
- switch (info->event_type) {
- case INT_BUTTON_PRESS:
- handle_button_press_event(p_slot);
- break;
- case INT_POWER_FAULT:
- if (!POWER_CTRL(ctrl))
- break;
- pciehp_set_attention_status(p_slot, 1);
- pciehp_green_led_off(p_slot);
- break;
- case INT_PRESENCE_ON:
- pciehp_queue_power_work(p_slot, ENABLE_REQ);
+ struct controller *ctrl = slot->ctrl;
+ bool link_active;
+ u8 present;
+
+ /*
+ * If the slot is on and presence or link has changed, turn it off.
+ * Even if it's occupied again, we cannot assume the card is the same.
+ */
+ mutex_lock(&slot->lock);
+ switch (slot->state) {
+ case BLINKINGOFF_STATE:
+ cancel_delayed_work(&slot->work);
+ /* fall through */
+ case ON_STATE:
+ slot->state = POWEROFF_STATE;
+ mutex_unlock(&slot->lock);
+ if (events & PCI_EXP_SLTSTA_DLLSC)
+ ctrl_info(ctrl, "Slot(%s): Link Down\n",
+ slot_name(slot));
+ if (events & PCI_EXP_SLTSTA_PDC)
+ ctrl_info(ctrl, "Slot(%s): Card not present\n",
+ slot_name(slot));
+ pciehp_disable_slot(slot);
break;
- case INT_PRESENCE_OFF:
- /*
- * Regardless of surprise capability, we need to
- * definitely remove a card that has been pulled out!
- */
- pciehp_queue_power_work(p_slot, DISABLE_REQ);
+ default:
+ mutex_unlock(&slot->lock);
break;
- case INT_LINK_UP:
- case INT_LINK_DOWN:
- handle_link_event(p_slot, info->event_type);
+ }
+
+ /* Turn the slot on if it's occupied or link is up */
+ mutex_lock(&slot->lock);
+ pciehp_get_adapter_status(slot, &present);
+ link_active = pciehp_check_link_active(ctrl);
+ if (!present && !link_active) {
+ mutex_unlock(&slot->lock);
+ return;
+ }
+
+ switch (slot->state) {
+ case BLINKINGON_STATE:
+ cancel_delayed_work(&slot->work);
+ /* fall through */
+ case OFF_STATE:
+ slot->state = POWERON_STATE;
+ mutex_unlock(&slot->lock);
+ if (present)
+ ctrl_info(ctrl, "Slot(%s): Card present\n",
+ slot_name(slot));
+ if (link_active)
+ ctrl_info(ctrl, "Slot(%s): Link Up\n",
+ slot_name(slot));
+ ctrl->request_result = pciehp_enable_slot(slot);
break;
default:
+ mutex_unlock(&slot->lock);
break;
}
- mutex_unlock(&p_slot->lock);
-
- kfree(info);
}
-/*
- * Note: This function must be called with slot->hotplug_lock held
- */
-int pciehp_enable_slot(struct slot *p_slot)
+static int __pciehp_enable_slot(struct slot *p_slot)
{
u8 getstatus = 0;
struct controller *ctrl = p_slot->ctrl;
@@ -404,17 +311,29 @@ int pciehp_enable_slot(struct slot *p_slot)
return board_added(p_slot);
}
-/*
- * Note: This function must be called with slot->hotplug_lock held
- */
-int pciehp_disable_slot(struct slot *p_slot)
+static int pciehp_enable_slot(struct slot *slot)
+{
+ struct controller *ctrl = slot->ctrl;
+ int ret;
+
+ pm_runtime_get_sync(&ctrl->pcie->port->dev);
+ ret = __pciehp_enable_slot(slot);
+ if (ret && ATTN_BUTTN(ctrl))
+ pciehp_green_led_off(slot); /* may be blinking */
+ pm_runtime_put(&ctrl->pcie->port->dev);
+
+ mutex_lock(&slot->lock);
+ slot->state = ret ? OFF_STATE : ON_STATE;
+ mutex_unlock(&slot->lock);
+
+ return ret;
+}
+
+static int __pciehp_disable_slot(struct slot *p_slot)
{
u8 getstatus = 0;
struct controller *ctrl = p_slot->ctrl;
- if (!p_slot->ctrl)
- return 1;
-
if (POWER_CTRL(p_slot->ctrl)) {
pciehp_get_power_status(p_slot, &getstatus);
if (!getstatus) {
@@ -424,32 +343,50 @@ int pciehp_disable_slot(struct slot *p_slot)
}
}
- return remove_board(p_slot);
+ remove_board(p_slot);
+ return 0;
+}
+
+static int pciehp_disable_slot(struct slot *slot)
+{
+ struct controller *ctrl = slot->ctrl;
+ int ret;
+
+ pm_runtime_get_sync(&ctrl->pcie->port->dev);
+ ret = __pciehp_disable_slot(slot);
+ pm_runtime_put(&ctrl->pcie->port->dev);
+
+ mutex_lock(&slot->lock);
+ slot->state = OFF_STATE;
+ mutex_unlock(&slot->lock);
+
+ return ret;
}
int pciehp_sysfs_enable_slot(struct slot *p_slot)
{
- int retval = -ENODEV;
struct controller *ctrl = p_slot->ctrl;
mutex_lock(&p_slot->lock);
switch (p_slot->state) {
case BLINKINGON_STATE:
- cancel_delayed_work(&p_slot->work);
- case STATIC_STATE:
- p_slot->state = POWERON_STATE;
+ case OFF_STATE:
mutex_unlock(&p_slot->lock);
- mutex_lock(&p_slot->hotplug_lock);
- retval = pciehp_enable_slot(p_slot);
- mutex_unlock(&p_slot->hotplug_lock);
- mutex_lock(&p_slot->lock);
- p_slot->state = STATIC_STATE;
- break;
+ /*
+ * The IRQ thread becomes a no-op if the user pulls out the
+ * card before the thread wakes up, so initialize to -ENODEV.
+ */
+ ctrl->request_result = -ENODEV;
+ pciehp_request(ctrl, PCI_EXP_SLTSTA_PDC);
+ wait_event(ctrl->requester,
+ !atomic_read(&ctrl->pending_events));
+ return ctrl->request_result;
case POWERON_STATE:
ctrl_info(ctrl, "Slot(%s): Already in powering on state\n",
slot_name(p_slot));
break;
case BLINKINGOFF_STATE:
+ case ON_STATE:
case POWEROFF_STATE:
ctrl_info(ctrl, "Slot(%s): Already enabled\n",
slot_name(p_slot));
@@ -461,32 +398,28 @@ int pciehp_sysfs_enable_slot(struct slot *p_slot)
}
mutex_unlock(&p_slot->lock);
- return retval;
+ return -ENODEV;
}
int pciehp_sysfs_disable_slot(struct slot *p_slot)
{
- int retval = -ENODEV;
struct controller *ctrl = p_slot->ctrl;
mutex_lock(&p_slot->lock);
switch (p_slot->state) {
case BLINKINGOFF_STATE:
- cancel_delayed_work(&p_slot->work);
- case STATIC_STATE:
- p_slot->state = POWEROFF_STATE;
+ case ON_STATE:
mutex_unlock(&p_slot->lock);
- mutex_lock(&p_slot->hotplug_lock);
- retval = pciehp_disable_slot(p_slot);
- mutex_unlock(&p_slot->hotplug_lock);
- mutex_lock(&p_slot->lock);
- p_slot->state = STATIC_STATE;
- break;
+ pciehp_request(ctrl, DISABLE_SLOT);
+ wait_event(ctrl->requester,
+ !atomic_read(&ctrl->pending_events));
+ return ctrl->request_result;
case POWEROFF_STATE:
ctrl_info(ctrl, "Slot(%s): Already in powering off state\n",
slot_name(p_slot));
break;
case BLINKINGON_STATE:
+ case OFF_STATE:
case POWERON_STATE:
ctrl_info(ctrl, "Slot(%s): Already disabled\n",
slot_name(p_slot));
@@ -498,5 +431,5 @@ int pciehp_sysfs_disable_slot(struct slot *p_slot)
}
mutex_unlock(&p_slot->lock);
- return retval;
+ return -ENODEV;
}
diff --git a/drivers/pci/hotplug/pciehp_hpc.c b/drivers/pci/hotplug/pciehp_hpc.c
index 718b6073afad..7136e3430925 100644
--- a/drivers/pci/hotplug/pciehp_hpc.c
+++ b/drivers/pci/hotplug/pciehp_hpc.c
@@ -17,8 +17,9 @@
#include <linux/types.h>
#include <linux/signal.h>
#include <linux/jiffies.h>
-#include <linux/timer.h>
+#include <linux/kthread.h>
#include <linux/pci.h>
+#include <linux/pm_runtime.h>
#include <linux/interrupt.h>
#include <linux/time.h>
#include <linux/slab.h>
@@ -31,47 +32,24 @@ static inline struct pci_dev *ctrl_dev(struct controller *ctrl)
return ctrl->pcie->port;
}
-static irqreturn_t pcie_isr(int irq, void *dev_id);
-static void start_int_poll_timer(struct controller *ctrl, int sec);
-
-/* This is the interrupt polling timeout function. */
-static void int_poll_timeout(struct timer_list *t)
-{
- struct controller *ctrl = from_timer(ctrl, t, poll_timer);
-
- /* Poll for interrupt events. regs == NULL => polling */
- pcie_isr(0, ctrl);
-
- if (!pciehp_poll_time)
- pciehp_poll_time = 2; /* default polling interval is 2 sec */
-
- start_int_poll_timer(ctrl, pciehp_poll_time);
-}
-
-/* This function starts the interrupt polling timer. */
-static void start_int_poll_timer(struct controller *ctrl, int sec)
-{
- /* Clamp to sane value */
- if ((sec <= 0) || (sec > 60))
- sec = 2;
-
- ctrl->poll_timer.expires = jiffies + sec * HZ;
- add_timer(&ctrl->poll_timer);
-}
+static irqreturn_t pciehp_isr(int irq, void *dev_id);
+static irqreturn_t pciehp_ist(int irq, void *dev_id);
+static int pciehp_poll(void *data);
static inline int pciehp_request_irq(struct controller *ctrl)
{
int retval, irq = ctrl->pcie->irq;
- /* Install interrupt polling timer. Start with 10 sec delay */
if (pciehp_poll_mode) {
- timer_setup(&ctrl->poll_timer, int_poll_timeout, 0);
- start_int_poll_timer(ctrl, 10);
- return 0;
+ ctrl->poll_thread = kthread_run(&pciehp_poll, ctrl,
+ "pciehp_poll-%s",
+ slot_name(ctrl->slot));
+ return PTR_ERR_OR_ZERO(ctrl->poll_thread);
}
/* Installs the interrupt handler */
- retval = request_irq(irq, pcie_isr, IRQF_SHARED, MY_NAME, ctrl);
+ retval = request_threaded_irq(irq, pciehp_isr, pciehp_ist,
+ IRQF_SHARED, MY_NAME, ctrl);
if (retval)
ctrl_err(ctrl, "Cannot get irq %d for the hotplug controller\n",
irq);
@@ -81,7 +59,7 @@ static inline int pciehp_request_irq(struct controller *ctrl)
static inline void pciehp_free_irq(struct controller *ctrl)
{
if (pciehp_poll_mode)
- del_timer_sync(&ctrl->poll_timer);
+ kthread_stop(ctrl->poll_thread);
else
free_irq(ctrl->pcie->irq, ctrl);
}
@@ -293,6 +271,11 @@ int pciehp_check_link_status(struct controller *ctrl)
found = pci_bus_check_dev(ctrl->pcie->port->subordinate,
PCI_DEVFN(0, 0));
+ /* ignore link or presence changes up to this point */
+ if (found)
+ atomic_and(~(PCI_EXP_SLTSTA_DLLSC | PCI_EXP_SLTSTA_PDC),
+ &ctrl->pending_events);
+
pcie_capability_read_word(pdev, PCI_EXP_LNKSTA, &lnk_status);
ctrl_dbg(ctrl, "%s: lnk_status = %x\n", __func__, lnk_status);
if ((lnk_status & PCI_EXP_LNKSTA_LT) ||
@@ -339,7 +322,9 @@ int pciehp_get_raw_indicator_status(struct hotplug_slot *hotplug_slot,
struct pci_dev *pdev = ctrl_dev(slot->ctrl);
u16 slot_ctrl;
+ pci_config_pm_runtime_get(pdev);
pcie_capability_read_word(pdev, PCI_EXP_SLTCTL, &slot_ctrl);
+ pci_config_pm_runtime_put(pdev);
*status = (slot_ctrl & (PCI_EXP_SLTCTL_AIC | PCI_EXP_SLTCTL_PIC)) >> 6;
return 0;
}
@@ -350,7 +335,9 @@ void pciehp_get_attention_status(struct slot *slot, u8 *status)
struct pci_dev *pdev = ctrl_dev(ctrl);
u16 slot_ctrl;
+ pci_config_pm_runtime_get(pdev);
pcie_capability_read_word(pdev, PCI_EXP_SLTCTL, &slot_ctrl);
+ pci_config_pm_runtime_put(pdev);
ctrl_dbg(ctrl, "%s: SLOTCTRL %x, value read %x\n", __func__,
pci_pcie_cap(ctrl->pcie->port) + PCI_EXP_SLTCTL, slot_ctrl);
@@ -425,9 +412,12 @@ int pciehp_set_raw_indicator_status(struct hotplug_slot *hotplug_slot,
{
struct slot *slot = hotplug_slot->private;
struct controller *ctrl = slot->ctrl;
+ struct pci_dev *pdev = ctrl_dev(ctrl);
+ pci_config_pm_runtime_get(pdev);
pcie_write_cmd_nowait(ctrl, status << 6,
PCI_EXP_SLTCTL_AIC | PCI_EXP_SLTCTL_PIC);
+ pci_config_pm_runtime_put(pdev);
return 0;
}
@@ -539,20 +529,35 @@ static irqreturn_t pciehp_isr(int irq, void *dev_id)
{
struct controller *ctrl = (struct controller *)dev_id;
struct pci_dev *pdev = ctrl_dev(ctrl);
- struct pci_bus *subordinate = pdev->subordinate;
- struct pci_dev *dev;
- struct slot *slot = ctrl->slot;
+ struct device *parent = pdev->dev.parent;
u16 status, events;
- u8 present;
- bool link;
- /* Interrupts cannot originate from a controller that's asleep */
+ /*
+ * Interrupts only occur in D3hot or shallower (PCIe r4.0, sec 6.7.3.4).
+ */
if (pdev->current_state == PCI_D3cold)
return IRQ_NONE;
+ /*
+ * Keep the port accessible by holding a runtime PM ref on its parent.
+ * Defer resume of the parent to the IRQ thread if it's suspended.
+ * Mask the interrupt until then.
+ */
+ if (parent) {
+ pm_runtime_get_noresume(parent);
+ if (!pm_runtime_active(parent)) {
+ pm_runtime_put(parent);
+ disable_irq_nosync(irq);
+ atomic_or(RERUN_ISR, &ctrl->pending_events);
+ return IRQ_WAKE_THREAD;
+ }
+ }
+
pcie_capability_read_word(pdev, PCI_EXP_SLTSTA, &status);
if (status == (u16) ~0) {
ctrl_info(ctrl, "%s: no response from device\n", __func__);
+ if (parent)
+ pm_runtime_put(parent);
return IRQ_NONE;
}
@@ -571,86 +576,119 @@ static irqreturn_t pciehp_isr(int irq, void *dev_id)
if (ctrl->power_fault_detected)
events &= ~PCI_EXP_SLTSTA_PFD;
- if (!events)
+ if (!events) {
+ if (parent)
+ pm_runtime_put(parent);
return IRQ_NONE;
-
- /* Capture link status before clearing interrupts */
- if (events & PCI_EXP_SLTSTA_DLLSC)
- link = pciehp_check_link_active(ctrl);
+ }
pcie_capability_write_word(pdev, PCI_EXP_SLTSTA, events);
ctrl_dbg(ctrl, "pending interrupts %#06x from Slot Status\n", events);
+ if (parent)
+ pm_runtime_put(parent);
- /* Check Command Complete Interrupt Pending */
+ /*
+ * Command Completed notifications are not deferred to the
+ * IRQ thread because it may be waiting for their arrival.
+ */
if (events & PCI_EXP_SLTSTA_CC) {
ctrl->cmd_busy = 0;
smp_mb();
wake_up(&ctrl->queue);
+
+ if (events == PCI_EXP_SLTSTA_CC)
+ return IRQ_HANDLED;
+
+ events &= ~PCI_EXP_SLTSTA_CC;
+ }
+
+ if (pdev->ignore_hotplug) {
+ ctrl_dbg(ctrl, "ignoring hotplug event %#06x\n", events);
+ return IRQ_HANDLED;
}
- if (subordinate) {
- list_for_each_entry(dev, &subordinate->devices, bus_list) {
- if (dev->ignore_hotplug) {
- ctrl_dbg(ctrl, "ignoring hotplug event %#06x (%s requested no hotplug)\n",
- events, pci_name(dev));
- return IRQ_HANDLED;
- }
+ /* Save pending events for consumption by IRQ thread. */
+ atomic_or(events, &ctrl->pending_events);
+ return IRQ_WAKE_THREAD;
+}
+
+static irqreturn_t pciehp_ist(int irq, void *dev_id)
+{
+ struct controller *ctrl = (struct controller *)dev_id;
+ struct pci_dev *pdev = ctrl_dev(ctrl);
+ struct slot *slot = ctrl->slot;
+ irqreturn_t ret;
+ u32 events;
+
+ pci_config_pm_runtime_get(pdev);
+
+ /* rerun pciehp_isr() if the port was inaccessible on interrupt */
+ if (atomic_fetch_and(~RERUN_ISR, &ctrl->pending_events) & RERUN_ISR) {
+ ret = pciehp_isr(irq, dev_id);
+ enable_irq(irq);
+ if (ret != IRQ_WAKE_THREAD) {
+ pci_config_pm_runtime_put(pdev);
+ return ret;
}
}
+ synchronize_hardirq(irq);
+ events = atomic_xchg(&ctrl->pending_events, 0);
+ if (!events) {
+ pci_config_pm_runtime_put(pdev);
+ return IRQ_NONE;
+ }
+
/* Check Attention Button Pressed */
if (events & PCI_EXP_SLTSTA_ABP) {
ctrl_info(ctrl, "Slot(%s): Attention button pressed\n",
slot_name(slot));
- pciehp_queue_interrupt_event(slot, INT_BUTTON_PRESS);
+ pciehp_handle_button_press(slot);
}
/*
- * Check Link Status Changed at higher precedence than Presence
- * Detect Changed. The PDS value may be set to "card present" from
- * out-of-band detection, which may be in conflict with a Link Down
- * and cause the wrong event to queue.
+ * Disable requests have higher priority than Presence Detect Changed
+ * or Data Link Layer State Changed events.
*/
- if (events & PCI_EXP_SLTSTA_DLLSC) {
- ctrl_info(ctrl, "Slot(%s): Link %s\n", slot_name(slot),
- link ? "Up" : "Down");
- pciehp_queue_interrupt_event(slot, link ? INT_LINK_UP :
- INT_LINK_DOWN);
- } else if (events & PCI_EXP_SLTSTA_PDC) {
- present = !!(status & PCI_EXP_SLTSTA_PDS);
- ctrl_info(ctrl, "Slot(%s): Card %spresent\n", slot_name(slot),
- present ? "" : "not ");
- pciehp_queue_interrupt_event(slot, present ? INT_PRESENCE_ON :
- INT_PRESENCE_OFF);
- }
+ down_read(&ctrl->reset_lock);
+ if (events & DISABLE_SLOT)
+ pciehp_handle_disable_request(slot);
+ else if (events & (PCI_EXP_SLTSTA_PDC | PCI_EXP_SLTSTA_DLLSC))
+ pciehp_handle_presence_or_link_change(slot, events);
+ up_read(&ctrl->reset_lock);
/* Check Power Fault Detected */
if ((events & PCI_EXP_SLTSTA_PFD) && !ctrl->power_fault_detected) {
ctrl->power_fault_detected = 1;
ctrl_err(ctrl, "Slot(%s): Power fault\n", slot_name(slot));
- pciehp_queue_interrupt_event(slot, INT_POWER_FAULT);
+ pciehp_set_attention_status(slot, 1);
+ pciehp_green_led_off(slot);
}
+ pci_config_pm_runtime_put(pdev);
+ wake_up(&ctrl->requester);
return IRQ_HANDLED;
}
-static irqreturn_t pcie_isr(int irq, void *dev_id)
+static int pciehp_poll(void *data)
{
- irqreturn_t rc, handled = IRQ_NONE;
+ struct controller *ctrl = data;
- /*
- * To guarantee that all interrupt events are serviced, we need to
- * re-inspect Slot Status register after clearing what is presumed
- * to be the last pending interrupt.
- */
- do {
- rc = pciehp_isr(irq, dev_id);
- if (rc == IRQ_HANDLED)
- handled = IRQ_HANDLED;
- } while (rc == IRQ_HANDLED);
+ schedule_timeout_idle(10 * HZ); /* start with 10 sec delay */
+
+ while (!kthread_should_stop()) {
+ /* poll for interrupt events or user requests */
+ while (pciehp_isr(IRQ_NOTCONNECTED, ctrl) == IRQ_WAKE_THREAD ||
+ atomic_read(&ctrl->pending_events))
+ pciehp_ist(IRQ_NOTCONNECTED, ctrl);
- /* Return IRQ_HANDLED if we handled one or more events */
- return handled;
+ if (pciehp_poll_time <= 0 || pciehp_poll_time > 60)
+ pciehp_poll_time = 2; /* clamp to sane value */
+
+ schedule_timeout_idle(pciehp_poll_time * HZ);
+ }
+
+ return 0;
}
static void pcie_enable_notification(struct controller *ctrl)
@@ -691,17 +729,6 @@ static void pcie_enable_notification(struct controller *ctrl)
pci_pcie_cap(ctrl->pcie->port) + PCI_EXP_SLTCTL, cmd);
}
-void pcie_reenable_notification(struct controller *ctrl)
-{
- /*
- * Clear both Presence and Data Link Layer Changed to make sure
- * those events still fire after we have re-enabled them.
- */
- pcie_capability_write_word(ctrl->pcie->port, PCI_EXP_SLTSTA,
- PCI_EXP_SLTSTA_PDC | PCI_EXP_SLTSTA_DLLSC);
- pcie_enable_notification(ctrl);
-}
-
static void pcie_disable_notification(struct controller *ctrl)
{
u16 mask;
@@ -715,6 +742,12 @@ static void pcie_disable_notification(struct controller *ctrl)
pci_pcie_cap(ctrl->pcie->port) + PCI_EXP_SLTCTL, 0);
}
+void pcie_clear_hotplug_events(struct controller *ctrl)
+{
+ pcie_capability_write_word(ctrl_dev(ctrl), PCI_EXP_SLTSTA,
+ PCI_EXP_SLTSTA_PDC | PCI_EXP_SLTSTA_DLLSC);
+}
+
/*
* pciehp has a 1:1 bus:slot relationship so we ultimately want a secondary
* bus reset of the bridge, but at the same time we want to ensure that it is
@@ -728,10 +761,13 @@ int pciehp_reset_slot(struct slot *slot, int probe)
struct controller *ctrl = slot->ctrl;
struct pci_dev *pdev = ctrl_dev(ctrl);
u16 stat_mask = 0, ctrl_mask = 0;
+ int rc;
if (probe)
return 0;
+ down_write(&ctrl->reset_lock);
+
if (!ATTN_BUTTN(ctrl)) {
ctrl_mask |= PCI_EXP_SLTCTL_PDCE;
stat_mask |= PCI_EXP_SLTSTA_PDC;
@@ -742,18 +778,16 @@ int pciehp_reset_slot(struct slot *slot, int probe)
pcie_write_cmd(ctrl, 0, ctrl_mask);
ctrl_dbg(ctrl, "%s: SLOTCTRL %x write cmd %x\n", __func__,
pci_pcie_cap(ctrl->pcie->port) + PCI_EXP_SLTCTL, 0);
- if (pciehp_poll_mode)
- del_timer_sync(&ctrl->poll_timer);
- pci_reset_bridge_secondary_bus(ctrl->pcie->port);
+ rc = pci_bridge_secondary_bus_reset(ctrl->pcie->port);
pcie_capability_write_word(pdev, PCI_EXP_SLTSTA, stat_mask);
pcie_write_cmd_nowait(ctrl, ctrl_mask, ctrl_mask);
ctrl_dbg(ctrl, "%s: SLOTCTRL %x write cmd %x\n", __func__,
pci_pcie_cap(ctrl->pcie->port) + PCI_EXP_SLTCTL, ctrl_mask);
- if (pciehp_poll_mode)
- int_poll_timeout(&ctrl->poll_timer);
- return 0;
+
+ up_write(&ctrl->reset_lock);
+ return rc;
}
int pcie_init_notification(struct controller *ctrl)
@@ -765,7 +799,7 @@ int pcie_init_notification(struct controller *ctrl)
return 0;
}
-static void pcie_shutdown_notification(struct controller *ctrl)
+void pcie_shutdown_notification(struct controller *ctrl)
{
if (ctrl->notification_enabled) {
pcie_disable_notification(ctrl);
@@ -776,32 +810,29 @@ static void pcie_shutdown_notification(struct controller *ctrl)
static int pcie_init_slot(struct controller *ctrl)
{
+ struct pci_bus *subordinate = ctrl_dev(ctrl)->subordinate;
struct slot *slot;
slot = kzalloc(sizeof(*slot), GFP_KERNEL);
if (!slot)
return -ENOMEM;
- slot->wq = alloc_ordered_workqueue("pciehp-%u", 0, PSN(ctrl));
- if (!slot->wq)
- goto abort;
+ down_read(&pci_bus_sem);
+ slot->state = list_empty(&subordinate->devices) ? OFF_STATE : ON_STATE;
+ up_read(&pci_bus_sem);
slot->ctrl = ctrl;
mutex_init(&slot->lock);
- mutex_init(&slot->hotplug_lock);
INIT_DELAYED_WORK(&slot->work, pciehp_queue_pushbutton_work);
ctrl->slot = slot;
return 0;
-abort:
- kfree(slot);
- return -ENOMEM;
}
static void pcie_cleanup_slot(struct controller *ctrl)
{
struct slot *slot = ctrl->slot;
- cancel_delayed_work(&slot->work);
- destroy_workqueue(slot->wq);
+
+ cancel_delayed_work_sync(&slot->work);
kfree(slot);
}
@@ -826,6 +857,7 @@ struct controller *pcie_init(struct pcie_device *dev)
{
struct controller *ctrl;
u32 slot_cap, link_cap;
+ u8 occupied, poweron;
struct pci_dev *pdev = dev->port;
ctrl = kzalloc(sizeof(*ctrl), GFP_KERNEL);
@@ -847,6 +879,8 @@ struct controller *pcie_init(struct pcie_device *dev)
ctrl->slot_cap = slot_cap;
mutex_init(&ctrl->ctrl_lock);
+ init_rwsem(&ctrl->reset_lock);
+ init_waitqueue_head(&ctrl->requester);
init_waitqueue_head(&ctrl->queue);
dbg_ctrl(ctrl);
@@ -855,16 +889,11 @@ struct controller *pcie_init(struct pcie_device *dev)
if (link_cap & PCI_EXP_LNKCAP_DLLLARC)
ctrl->link_active_reporting = 1;
- /*
- * Clear all remaining event bits in Slot Status register except
- * Presence Detect Changed. We want to make sure possible
- * hotplug event is triggered when the interrupt is unmasked so
- * that we don't lose that event.
- */
+ /* Clear all remaining event bits in Slot Status register. */
pcie_capability_write_word(pdev, PCI_EXP_SLTSTA,
PCI_EXP_SLTSTA_ABP | PCI_EXP_SLTSTA_PFD |
PCI_EXP_SLTSTA_MRLSC | PCI_EXP_SLTSTA_CC |
- PCI_EXP_SLTSTA_DLLSC);
+ PCI_EXP_SLTSTA_DLLSC | PCI_EXP_SLTSTA_PDC);
ctrl_info(ctrl, "Slot #%d AttnBtn%c PwrCtrl%c MRL%c AttnInd%c PwrInd%c HotPlug%c Surprise%c Interlock%c NoCompl%c LLActRep%c%s\n",
(slot_cap & PCI_EXP_SLTCAP_PSN) >> 19,
@@ -883,6 +912,19 @@ struct controller *pcie_init(struct pcie_device *dev)
if (pcie_init_slot(ctrl))
goto abort_ctrl;
+ /*
+ * If empty slot's power status is on, turn power off. The IRQ isn't
+ * requested yet, so avoid triggering a notification with this command.
+ */
+ if (POWER_CTRL(ctrl)) {
+ pciehp_get_adapter_status(ctrl->slot, &occupied);
+ pciehp_get_power_status(ctrl->slot, &poweron);
+ if (!occupied && poweron) {
+ pcie_disable_notification(ctrl);
+ pciehp_power_off_slot(ctrl->slot);
+ }
+ }
+
return ctrl;
abort_ctrl:
@@ -893,7 +935,6 @@ abort:
void pciehp_release_ctrl(struct controller *ctrl)
{
- pcie_shutdown_notification(ctrl);
pcie_cleanup_slot(ctrl);
kfree(ctrl);
}
diff --git a/drivers/pci/hotplug/pciehp_pci.c b/drivers/pci/hotplug/pciehp_pci.c
index 3f518dea856d..5c58c22e0c08 100644
--- a/drivers/pci/hotplug/pciehp_pci.c
+++ b/drivers/pci/hotplug/pciehp_pci.c
@@ -62,9 +62,8 @@ int pciehp_configure_device(struct slot *p_slot)
return ret;
}
-int pciehp_unconfigure_device(struct slot *p_slot)
+void pciehp_unconfigure_device(struct slot *p_slot)
{
- int rc = 0;
u8 presence = 0;
struct pci_dev *dev, *temp;
struct pci_bus *parent = p_slot->ctrl->pcie->port->subordinate;
@@ -107,5 +106,4 @@ int pciehp_unconfigure_device(struct slot *p_slot)
}
pci_unlock_rescan_remove();
- return rc;
}
diff --git a/drivers/pci/hotplug/pcihp_skeleton.c b/drivers/pci/hotplug/pcihp_skeleton.c
deleted file mode 100644
index c19694a04d2c..000000000000
--- a/drivers/pci/hotplug/pcihp_skeleton.c
+++ /dev/null
@@ -1,348 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0+
-/*
- * PCI Hot Plug Controller Skeleton Driver - 0.3
- *
- * Copyright (C) 2001,2003 Greg Kroah-Hartman (greg@kroah.com)
- * Copyright (C) 2001,2003 IBM Corp.
- *
- * All rights reserved.
- *
- * This driver is to be used as a skeleton driver to show how to interface
- * with the pci hotplug core easily.
- *
- * Send feedback to <greg@kroah.com>
- *
- */
-
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/kernel.h>
-#include <linux/slab.h>
-#include <linux/pci.h>
-#include <linux/pci_hotplug.h>
-#include <linux/init.h>
-
-#define SLOT_NAME_SIZE 10
-struct slot {
- u8 number;
- struct hotplug_slot *hotplug_slot;
- struct list_head slot_list;
- char name[SLOT_NAME_SIZE];
-};
-
-static LIST_HEAD(slot_list);
-
-#define MY_NAME "pcihp_skeleton"
-
-#define dbg(format, arg...) \
- do { \
- if (debug) \
- printk(KERN_DEBUG "%s: " format "\n", \
- MY_NAME, ## arg); \
- } while (0)
-#define err(format, arg...) printk(KERN_ERR "%s: " format "\n", MY_NAME, ## arg)
-#define info(format, arg...) printk(KERN_INFO "%s: " format "\n", MY_NAME, ## arg)
-#define warn(format, arg...) printk(KERN_WARNING "%s: " format "\n", MY_NAME, ## arg)
-
-/* local variables */
-static bool debug;
-static int num_slots;
-
-#define DRIVER_VERSION "0.3"
-#define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com>"
-#define DRIVER_DESC "Hot Plug PCI Controller Skeleton Driver"
-
-MODULE_AUTHOR(DRIVER_AUTHOR);
-MODULE_DESCRIPTION(DRIVER_DESC);
-MODULE_LICENSE("GPL");
-module_param(debug, bool, 0644);
-MODULE_PARM_DESC(debug, "Debugging mode enabled or not");
-
-static int enable_slot(struct hotplug_slot *slot);
-static int disable_slot(struct hotplug_slot *slot);
-static int set_attention_status(struct hotplug_slot *slot, u8 value);
-static int hardware_test(struct hotplug_slot *slot, u32 value);
-static int get_power_status(struct hotplug_slot *slot, u8 *value);
-static int get_attention_status(struct hotplug_slot *slot, u8 *value);
-static int get_latch_status(struct hotplug_slot *slot, u8 *value);
-static int get_adapter_status(struct hotplug_slot *slot, u8 *value);
-
-static struct hotplug_slot_ops skel_hotplug_slot_ops = {
- .enable_slot = enable_slot,
- .disable_slot = disable_slot,
- .set_attention_status = set_attention_status,
- .hardware_test = hardware_test,
- .get_power_status = get_power_status,
- .get_attention_status = get_attention_status,
- .get_latch_status = get_latch_status,
- .get_adapter_status = get_adapter_status,
-};
-
-static int enable_slot(struct hotplug_slot *hotplug_slot)
-{
- struct slot *slot = hotplug_slot->private;
- int retval = 0;
-
- dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name);
-
- /*
- * Fill in code here to enable the specified slot
- */
-
- return retval;
-}
-
-static int disable_slot(struct hotplug_slot *hotplug_slot)
-{
- struct slot *slot = hotplug_slot->private;
- int retval = 0;
-
- dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name);
-
- /*
- * Fill in code here to disable the specified slot
- */
-
- return retval;
-}
-
-static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 status)
-{
- struct slot *slot = hotplug_slot->private;
- int retval = 0;
-
- dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name);
-
- switch (status) {
- case 0:
- /*
- * Fill in code here to turn light off
- */
- break;
-
- case 1:
- default:
- /*
- * Fill in code here to turn light on
- */
- break;
- }
-
- return retval;
-}
-
-static int hardware_test(struct hotplug_slot *hotplug_slot, u32 value)
-{
- struct slot *slot = hotplug_slot->private;
- int retval = 0;
-
- dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name);
-
- switch (value) {
- case 0:
- /* Specify a test here */
- break;
- case 1:
- /* Specify another test here */
- break;
- }
-
- return retval;
-}
-
-static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value)
-{
- struct slot *slot = hotplug_slot->private;
- int retval = 0;
-
- dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name);
-
- /*
- * Fill in logic to get the current power status of the specific
- * slot and store it in the *value location.
- */
-
- return retval;
-}
-
-static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value)
-{
- struct slot *slot = hotplug_slot->private;
- int retval = 0;
-
- dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name);
-
- /*
- * Fill in logic to get the current attention status of the specific
- * slot and store it in the *value location.
- */
-
- return retval;
-}
-
-static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value)
-{
- struct slot *slot = hotplug_slot->private;
- int retval = 0;
-
- dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name);
-
- /*
- * Fill in logic to get the current latch status of the specific
- * slot and store it in the *value location.
- */
-
- return retval;
-}
-
-static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value)
-{
- struct slot *slot = hotplug_slot->private;
- int retval = 0;
-
- dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name);
-
- /*
- * Fill in logic to get the current adapter status of the specific
- * slot and store it in the *value location.
- */
-
- return retval;
-}
-
-static void release_slot(struct hotplug_slot *hotplug_slot)
-{
- struct slot *slot = hotplug_slot->private;
-
- dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name);
- kfree(slot->hotplug_slot->info);
- kfree(slot->hotplug_slot);
- kfree(slot);
-}
-
-static void make_slot_name(struct slot *slot)
-{
- /*
- * Stupid way to make a filename out of the slot name.
- * replace this if your hardware provides a better way to name slots.
- */
- snprintf(slot->hotplug_slot->name, SLOT_NAME_SIZE, "%d", slot->number);
-}
-
-/**
- * init_slots - initialize 'struct slot' structures for each slot
- *
- */
-static int __init init_slots(void)
-{
- struct slot *slot;
- struct hotplug_slot *hotplug_slot;
- struct hotplug_slot_info *info;
- int retval;
- int i;
-
- /*
- * Create a structure for each slot, and register that slot
- * with the pci_hotplug subsystem.
- */
- for (i = 0; i < num_slots; ++i) {
- slot = kzalloc(sizeof(*slot), GFP_KERNEL);
- if (!slot) {
- retval = -ENOMEM;
- goto error;
- }
-
- hotplug_slot = kzalloc(sizeof(*hotplug_slot), GFP_KERNEL);
- if (!hotplug_slot) {
- retval = -ENOMEM;
- goto error_slot;
- }
- slot->hotplug_slot = hotplug_slot;
-
- info = kzalloc(sizeof(*info), GFP_KERNEL);
- if (!info) {
- retval = -ENOMEM;
- goto error_hpslot;
- }
- hotplug_slot->info = info;
-
- slot->number = i;
-
- hotplug_slot->name = slot->name;
- hotplug_slot->private = slot;
- hotplug_slot->release = &release_slot;
- make_slot_name(slot);
- hotplug_slot->ops = &skel_hotplug_slot_ops;
-
- /*
- * Initialize the slot info structure with some known
- * good values.
- */
- get_power_status(hotplug_slot, &info->power_status);
- get_attention_status(hotplug_slot, &info->attention_status);
- get_latch_status(hotplug_slot, &info->latch_status);
- get_adapter_status(hotplug_slot, &info->adapter_status);
-
- dbg("registering slot %d\n", i);
- retval = pci_hp_register(slot->hotplug_slot);
- if (retval) {
- err("pci_hp_register failed with error %d\n", retval);
- goto error_info;
- }
-
- /* add slot to our internal list */
- list_add(&slot->slot_list, &slot_list);
- }
-
- return 0;
-error_info:
- kfree(info);
-error_hpslot:
- kfree(hotplug_slot);
-error_slot:
- kfree(slot);
-error:
- return retval;
-}
-
-static void __exit cleanup_slots(void)
-{
- struct slot *slot, *next;
-
- /*
- * Unregister all of our slots with the pci_hotplug subsystem.
- * Memory will be freed in release_slot() callback after slot's
- * lifespan is finished.
- */
- list_for_each_entry_safe(slot, next, &slot_list, slot_list) {
- list_del(&slot->slot_list);
- pci_hp_deregister(slot->hotplug_slot);
- }
-}
-
-static int __init pcihp_skel_init(void)
-{
- int retval;
-
- info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
- /*
- * Do specific initialization stuff for your driver here
- * like initializing your controller hardware (if any) and
- * determining the number of slots you have in the system
- * right now.
- */
- num_slots = 5;
-
- return init_slots();
-}
-
-static void __exit pcihp_skel_exit(void)
-{
- /*
- * Clean everything up.
- */
- cleanup_slots();
-}
-
-module_init(pcihp_skel_init);
-module_exit(pcihp_skel_exit);
diff --git a/drivers/pci/hotplug/pnv_php.c b/drivers/pci/hotplug/pnv_php.c
index 6c2e8d7307c6..3276a5e4c430 100644
--- a/drivers/pci/hotplug/pnv_php.c
+++ b/drivers/pci/hotplug/pnv_php.c
@@ -538,9 +538,8 @@ static struct hotplug_slot_ops php_slot_ops = {
.disable_slot = pnv_php_disable_slot,
};
-static void pnv_php_release(struct hotplug_slot *slot)
+static void pnv_php_release(struct pnv_php_slot *php_slot)
{
- struct pnv_php_slot *php_slot = slot->private;
unsigned long flags;
/* Remove from global or child list */
@@ -596,7 +595,6 @@ static struct pnv_php_slot *pnv_php_alloc_slot(struct device_node *dn)
php_slot->power_state_check = false;
php_slot->slot.ops = &php_slot_ops;
php_slot->slot.info = &php_slot->slot_info;
- php_slot->slot.release = pnv_php_release;
php_slot->slot.private = php_slot;
INIT_LIST_HEAD(&php_slot->children);
@@ -924,6 +922,7 @@ static void pnv_php_unregister_one(struct device_node *dn)
php_slot->state = PNV_PHP_STATE_OFFLINE;
pci_hp_deregister(&php_slot->slot);
+ pnv_php_release(php_slot);
pnv_php_put_slot(php_slot);
}
diff --git a/drivers/pci/hotplug/rpaphp_core.c b/drivers/pci/hotplug/rpaphp_core.c
index fb5e0845429d..857c358b727b 100644
--- a/drivers/pci/hotplug/rpaphp_core.c
+++ b/drivers/pci/hotplug/rpaphp_core.c
@@ -404,13 +404,13 @@ static void __exit cleanup_slots(void)
/*
* Unregister all of our slots with the pci_hotplug subsystem,
* and free up all memory that we had allocated.
- * memory will be freed in release_slot callback.
*/
list_for_each_entry_safe(slot, next, &rpaphp_slot_head,
rpaphp_slot_list) {
list_del(&slot->rpaphp_slot_list);
pci_hp_deregister(slot->hotplug_slot);
+ dealloc_slot_struct(slot);
}
return;
}
diff --git a/drivers/pci/hotplug/rpaphp_slot.c b/drivers/pci/hotplug/rpaphp_slot.c
index 3840a2075e6a..b916c8e4372d 100644
--- a/drivers/pci/hotplug/rpaphp_slot.c
+++ b/drivers/pci/hotplug/rpaphp_slot.c
@@ -19,12 +19,6 @@
#include "rpaphp.h"
/* free up the memory used by a slot */
-static void rpaphp_release_slot(struct hotplug_slot *hotplug_slot)
-{
- struct slot *slot = (struct slot *) hotplug_slot->private;
- dealloc_slot_struct(slot);
-}
-
void dealloc_slot_struct(struct slot *slot)
{
kfree(slot->hotplug_slot->info);
@@ -56,7 +50,6 @@ struct slot *alloc_slot_struct(struct device_node *dn,
slot->power_domain = power_domain;
slot->hotplug_slot->private = slot;
slot->hotplug_slot->ops = &rpaphp_hotplug_slot_ops;
- slot->hotplug_slot->release = &rpaphp_release_slot;
return (slot);
@@ -90,10 +83,8 @@ int rpaphp_deregister_slot(struct slot *slot)
__func__, slot->name);
list_del(&slot->rpaphp_slot_list);
-
- retval = pci_hp_deregister(php_slot);
- if (retval)
- err("Problem unregistering a slot %s\n", slot->name);
+ pci_hp_deregister(php_slot);
+ dealloc_slot_struct(slot);
dbg("%s - Exit: rc[%d]\n", __func__, retval);
return retval;
diff --git a/drivers/pci/hotplug/s390_pci_hpc.c b/drivers/pci/hotplug/s390_pci_hpc.c
index ffdc2977395d..93b5341d282c 100644
--- a/drivers/pci/hotplug/s390_pci_hpc.c
+++ b/drivers/pci/hotplug/s390_pci_hpc.c
@@ -130,15 +130,6 @@ static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value)
return 0;
}
-static void release_slot(struct hotplug_slot *hotplug_slot)
-{
- struct slot *slot = hotplug_slot->private;
-
- kfree(slot->hotplug_slot->info);
- kfree(slot->hotplug_slot);
- kfree(slot);
-}
-
static struct hotplug_slot_ops s390_hotplug_slot_ops = {
.enable_slot = enable_slot,
.disable_slot = disable_slot,
@@ -175,7 +166,6 @@ int zpci_init_slot(struct zpci_dev *zdev)
hotplug_slot->info = info;
hotplug_slot->ops = &s390_hotplug_slot_ops;
- hotplug_slot->release = &release_slot;
get_power_status(hotplug_slot, &info->power_status);
get_adapter_status(hotplug_slot, &info->adapter_status);
@@ -209,5 +199,8 @@ void zpci_exit_slot(struct zpci_dev *zdev)
continue;
list_del(&slot->slot_list);
pci_hp_deregister(slot->hotplug_slot);
+ kfree(slot->hotplug_slot->info);
+ kfree(slot->hotplug_slot);
+ kfree(slot);
}
}
diff --git a/drivers/pci/hotplug/sgi_hotplug.c b/drivers/pci/hotplug/sgi_hotplug.c
index 78b6bdbb3a39..babd23409f61 100644
--- a/drivers/pci/hotplug/sgi_hotplug.c
+++ b/drivers/pci/hotplug/sgi_hotplug.c
@@ -628,7 +628,6 @@ static int sn_hotplug_slot_register(struct pci_bus *pci_bus)
goto alloc_err;
}
bss_hotplug_slot->ops = &sn_hotplug_slot_ops;
- bss_hotplug_slot->release = &sn_release_slot;
rc = pci_hp_register(bss_hotplug_slot, pci_bus, device, name);
if (rc)
@@ -656,8 +655,10 @@ alloc_err:
sn_release_slot(bss_hotplug_slot);
/* destroy anything else on the list */
- while ((bss_hotplug_slot = sn_hp_destroy()))
+ while ((bss_hotplug_slot = sn_hp_destroy())) {
pci_hp_deregister(bss_hotplug_slot);
+ sn_release_slot(bss_hotplug_slot);
+ }
return rc;
}
@@ -703,8 +704,10 @@ static void __exit sn_pci_hotplug_exit(void)
{
struct hotplug_slot *bss_hotplug_slot;
- while ((bss_hotplug_slot = sn_hp_destroy()))
+ while ((bss_hotplug_slot = sn_hp_destroy())) {
pci_hp_deregister(bss_hotplug_slot);
+ sn_release_slot(bss_hotplug_slot);
+ }
if (!list_empty(&sn_hp_list))
printk(KERN_ERR "%s: internal list is not empty\n", __FILE__);
diff --git a/drivers/pci/hotplug/shpchp_core.c b/drivers/pci/hotplug/shpchp_core.c
index e91be287f292..97cee23f3d51 100644
--- a/drivers/pci/hotplug/shpchp_core.c
+++ b/drivers/pci/hotplug/shpchp_core.c
@@ -61,22 +61,6 @@ static struct hotplug_slot_ops shpchp_hotplug_slot_ops = {
.get_adapter_status = get_adapter_status,
};
-/**
- * release_slot - free up the memory used by a slot
- * @hotplug_slot: slot to free
- */
-static void release_slot(struct hotplug_slot *hotplug_slot)
-{
- struct slot *slot = hotplug_slot->private;
-
- ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
- __func__, slot_name(slot));
-
- kfree(slot->hotplug_slot->info);
- kfree(slot->hotplug_slot);
- kfree(slot);
-}
-
static int init_slots(struct controller *ctrl)
{
struct slot *slot;
@@ -125,7 +109,6 @@ static int init_slots(struct controller *ctrl)
/* register this slot with the hotplug pci core */
hotplug_slot->private = slot;
- hotplug_slot->release = &release_slot;
snprintf(name, SLOT_NAME_SIZE, "%d", slot->number);
hotplug_slot->ops = &shpchp_hotplug_slot_ops;
@@ -171,6 +154,9 @@ void cleanup_slots(struct controller *ctrl)
cancel_delayed_work(&slot->work);
destroy_workqueue(slot->wq);
pci_hp_deregister(slot->hotplug_slot);
+ kfree(slot->hotplug_slot->info);
+ kfree(slot->hotplug_slot);
+ kfree(slot);
}
}
@@ -270,11 +256,30 @@ static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value)
return 0;
}
+static bool shpc_capable(struct pci_dev *bridge)
+{
+ /*
+ * It is assumed that AMD GOLAM chips support SHPC but they do not
+ * have SHPC capability.
+ */
+ if (bridge->vendor == PCI_VENDOR_ID_AMD &&
+ bridge->device == PCI_DEVICE_ID_AMD_GOLAM_7450)
+ return true;
+
+ if (pci_find_capability(bridge, PCI_CAP_ID_SHPC))
+ return true;
+
+ return false;
+}
+
static int shpc_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
int rc;
struct controller *ctrl;
+ if (!shpc_capable(pdev))
+ return -ENODEV;
+
if (acpi_get_hp_hw_control_from_firmware(pdev))
return -ENODEV;
@@ -303,6 +308,7 @@ static int shpc_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
if (rc)
goto err_cleanup_slots;
+ pdev->shpc_managed = 1;
return 0;
err_cleanup_slots:
@@ -319,6 +325,7 @@ static void shpc_remove(struct pci_dev *dev)
{
struct controller *ctrl = pci_get_drvdata(dev);
+ dev->shpc_managed = 0;
shpchp_remove_ctrl_files(ctrl);
ctrl->hpc_ops->release_ctlr(ctrl);
kfree(ctrl);
diff --git a/drivers/pci/hotplug/shpchp_ctrl.c b/drivers/pci/hotplug/shpchp_ctrl.c
index 1047b56e5730..1267dcc5a531 100644
--- a/drivers/pci/hotplug/shpchp_ctrl.c
+++ b/drivers/pci/hotplug/shpchp_ctrl.c
@@ -654,6 +654,7 @@ int shpchp_sysfs_enable_slot(struct slot *p_slot)
switch (p_slot->state) {
case BLINKINGON_STATE:
cancel_delayed_work(&p_slot->work);
+ /* fall through */
case STATIC_STATE:
p_slot->state = POWERON_STATE;
mutex_unlock(&p_slot->lock);
@@ -689,6 +690,7 @@ int shpchp_sysfs_disable_slot(struct slot *p_slot)
switch (p_slot->state) {
case BLINKINGOFF_STATE:
cancel_delayed_work(&p_slot->work);
+ /* fall through */
case STATIC_STATE:
p_slot->state = POWEROFF_STATE;
mutex_unlock(&p_slot->lock);
diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c
index 0f04ae648cf1..c5f3cd4ed766 100644
--- a/drivers/pci/iov.c
+++ b/drivers/pci/iov.c
@@ -818,15 +818,15 @@ int pci_sriov_set_totalvfs(struct pci_dev *dev, u16 numvfs)
{
if (!dev->is_physfn)
return -ENOSYS;
+
if (numvfs > dev->sriov->total_VFs)
return -EINVAL;
/* Shouldn't change if VFs already enabled */
if (dev->sriov->ctrl & PCI_SRIOV_CTRL_VFE)
return -EBUSY;
- else
- dev->sriov->driver_max_VFs = numvfs;
+ dev->sriov->driver_max_VFs = numvfs;
return 0;
}
EXPORT_SYMBOL_GPL(pci_sriov_set_totalvfs);
diff --git a/drivers/pci/irq.c b/drivers/pci/irq.c
index 2a808e10645f..a1de501a2729 100644
--- a/drivers/pci/irq.c
+++ b/drivers/pci/irq.c
@@ -86,13 +86,17 @@ int pci_request_irq(struct pci_dev *dev, unsigned int nr, irq_handler_t handler,
va_list ap;
int ret;
char *devname;
+ unsigned long irqflags = IRQF_SHARED;
+
+ if (!handler)
+ irqflags |= IRQF_ONESHOT;
va_start(ap, fmt);
devname = kvasprintf(GFP_KERNEL, fmt, ap);
va_end(ap);
ret = request_threaded_irq(pci_irq_vector(dev, nr), handler, thread_fn,
- IRQF_SHARED, devname, dev_id);
+ irqflags, devname, dev_id);
if (ret)
kfree(devname);
return ret;
diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
index 4d88afdfc843..f2ef896464b3 100644
--- a/drivers/pci/msi.c
+++ b/drivers/pci/msi.c
@@ -1446,6 +1446,9 @@ struct irq_domain *pci_msi_create_irq_domain(struct fwnode_handle *fwnode,
if (IS_ENABLED(CONFIG_GENERIC_IRQ_RESERVATION_MODE))
info->flags |= MSI_FLAG_MUST_REACTIVATE;
+ /* PCI-MSI is oneshot-safe */
+ info->chip->flags |= IRQCHIP_ONESHOT_SAFE;
+
domain = msi_create_irq_domain(fwnode, info, parent);
if (!domain)
return NULL;
diff --git a/drivers/pci/of.c b/drivers/pci/of.c
index 69a60d6ebd73..1836b8ddf292 100644
--- a/drivers/pci/of.c
+++ b/drivers/pci/of.c
@@ -266,7 +266,7 @@ int devm_of_pci_get_host_bridge_resources(struct device *dev,
struct list_head *resources, resource_size_t *io_base)
{
struct device_node *dev_node = dev->of_node;
- struct resource *res;
+ struct resource *res, tmp_res;
struct resource *bus_range;
struct of_pci_range range;
struct of_pci_range_parser parser;
@@ -320,18 +320,16 @@ int devm_of_pci_get_host_bridge_resources(struct device *dev,
if (range.cpu_addr == OF_BAD_ADDR || range.size == 0)
continue;
- res = devm_kzalloc(dev, sizeof(struct resource), GFP_KERNEL);
+ err = of_pci_range_to_resource(&range, dev_node, &tmp_res);
+ if (err)
+ continue;
+
+ res = devm_kmemdup(dev, &tmp_res, sizeof(tmp_res), GFP_KERNEL);
if (!res) {
err = -ENOMEM;
goto failed;
}
- err = of_pci_range_to_resource(&range, dev_node, res);
- if (err) {
- devm_kfree(dev, res);
- continue;
- }
-
if (resource_type(res) == IORESOURCE_IO) {
if (!io_base) {
dev_err(dev, "I/O range found for %pOF. Please provide an io_base pointer to save CPU base address\n",
diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c
index 89ee6a2b6eb8..738e3546abb1 100644
--- a/drivers/pci/pci-acpi.c
+++ b/drivers/pci/pci-acpi.c
@@ -403,24 +403,7 @@ bool pciehp_is_native(struct pci_dev *bridge)
*/
bool shpchp_is_native(struct pci_dev *bridge)
{
- const struct pci_host_bridge *host;
-
- if (!IS_ENABLED(CONFIG_HOTPLUG_PCI_SHPC))
- return false;
-
- /*
- * It is assumed that AMD GOLAM chips support SHPC but they do not
- * have SHPC capability.
- */
- if (bridge->vendor == PCI_VENDOR_ID_AMD &&
- bridge->device == PCI_DEVICE_ID_AMD_GOLAM_7450)
- return true;
-
- if (!pci_find_capability(bridge, PCI_CAP_ID_SHPC))
- return false;
-
- host = pci_find_host_bridge(bridge->bus);
- return host->native_shpc_hotplug;
+ return bridge->shpc_managed;
}
/**
diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c
index 6792292b5fc7..bef17c3fca67 100644
--- a/drivers/pci/pci-driver.c
+++ b/drivers/pci/pci-driver.c
@@ -1668,7 +1668,7 @@ static int __init pci_driver_init(void)
if (ret)
return ret;
#endif
-
+ dma_debug_add_bus(&pci_bus_type);
return 0;
}
postcore_initcall(pci_driver_init);
diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c
index 0c4653c1d2ce..9ecfe13157c0 100644
--- a/drivers/pci/pci-sysfs.c
+++ b/drivers/pci/pci-sysfs.c
@@ -23,7 +23,6 @@
#include <linux/fs.h>
#include <linux/capability.h>
#include <linux/security.h>
-#include <linux/pci-aspm.h>
#include <linux/slab.h>
#include <linux/vgaarb.h>
#include <linux/pm_runtime.h>
@@ -1449,7 +1448,9 @@ static ssize_t reset_store(struct device *dev, struct device_attribute *attr,
if (val != 1)
return -EINVAL;
+ pm_runtime_get_sync(dev);
result = pci_reset_function(pdev);
+ pm_runtime_put(dev);
if (result < 0)
return result;
@@ -1746,6 +1747,9 @@ static const struct attribute_group *pci_dev_attr_groups[] = {
#endif
&pci_bridge_attr_group,
&pcie_dev_attr_group,
+#ifdef CONFIG_PCIEAER
+ &aer_stats_attr_group,
+#endif
NULL,
};
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index aa1684d99b70..29ff9619b5fa 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -23,7 +23,6 @@
#include <linux/string.h>
#include <linux/log2.h>
#include <linux/logic_pio.h>
-#include <linux/pci-aspm.h>
#include <linux/pm_wakeup.h>
#include <linux/interrupt.h>
#include <linux/device.h>
@@ -115,6 +114,9 @@ static bool pcie_ari_disabled;
/* If set, the PCIe ATS capability will not be used. */
static bool pcie_ats_disabled;
+/* If set, the PCI config space of each device is printed during boot. */
+bool pci_early_dump;
+
bool pci_ats_disabled(void)
{
return pcie_ats_disabled;
@@ -191,6 +193,168 @@ void __iomem *pci_ioremap_wc_bar(struct pci_dev *pdev, int bar)
EXPORT_SYMBOL_GPL(pci_ioremap_wc_bar);
#endif
+/**
+ * pci_dev_str_match_path - test if a path string matches a device
+ * @dev: the PCI device to test
+ * @p: string to match the device against
+ * @endptr: pointer to the string after the match
+ *
+ * Test if a string (typically from a kernel parameter) formatted as a
+ * path of device/function addresses matches a PCI device. The string must
+ * be of the form:
+ *
+ * [<domain>:]<bus>:<device>.<func>[/<device>.<func>]*
+ *
+ * A path for a device can be obtained using 'lspci -t'. Using a path
+ * is more robust against bus renumbering than using only a single bus,
+ * device and function address.
+ *
+ * Returns 1 if the string matches the device, 0 if it does not and
+ * a negative error code if it fails to parse the string.
+ */
+static int pci_dev_str_match_path(struct pci_dev *dev, const char *path,
+ const char **endptr)
+{
+ int ret;
+ int seg, bus, slot, func;
+ char *wpath, *p;
+ char end;
+
+ *endptr = strchrnul(path, ';');
+
+ wpath = kmemdup_nul(path, *endptr - path, GFP_KERNEL);
+ if (!wpath)
+ return -ENOMEM;
+
+ while (1) {
+ p = strrchr(wpath, '/');
+ if (!p)
+ break;
+ ret = sscanf(p, "/%x.%x%c", &slot, &func, &end);
+ if (ret != 2) {
+ ret = -EINVAL;
+ goto free_and_exit;
+ }
+
+ if (dev->devfn != PCI_DEVFN(slot, func)) {
+ ret = 0;
+ goto free_and_exit;
+ }
+
+ /*
+ * Note: we don't need to get a reference to the upstream
+ * bridge because we hold a reference to the top level
+ * device which should hold a reference to the bridge,
+ * and so on.
+ */
+ dev = pci_upstream_bridge(dev);
+ if (!dev) {
+ ret = 0;
+ goto free_and_exit;
+ }
+
+ *p = 0;
+ }
+
+ ret = sscanf(wpath, "%x:%x:%x.%x%c", &seg, &bus, &slot,
+ &func, &end);
+ if (ret != 4) {
+ seg = 0;
+ ret = sscanf(wpath, "%x:%x.%x%c", &bus, &slot, &func, &end);
+ if (ret != 3) {
+ ret = -EINVAL;
+ goto free_and_exit;
+ }
+ }
+
+ ret = (seg == pci_domain_nr(dev->bus) &&
+ bus == dev->bus->number &&
+ dev->devfn == PCI_DEVFN(slot, func));
+
+free_and_exit:
+ kfree(wpath);
+ return ret;
+}
+
+/**
+ * pci_dev_str_match - test if a string matches a device
+ * @dev: the PCI device to test
+ * @p: string to match the device against
+ * @endptr: pointer to the string after the match
+ *
+ * Test if a string (typically from a kernel parameter) matches a specified
+ * PCI device. The string may be of one of the following formats:
+ *
+ * [<domain>:]<bus>:<device>.<func>[/<device>.<func>]*
+ * pci:<vendor>:<device>[:<subvendor>:<subdevice>]
+ *
+ * The first format specifies a PCI bus/device/function address which
+ * may change if new hardware is inserted, if motherboard firmware changes,
+ * or due to changes caused in kernel parameters. If the domain is
+ * left unspecified, it is taken to be 0. In order to be robust against
+ * bus renumbering issues, a path of PCI device/function numbers may be used
+ * to address the specific device. The path for a device can be determined
+ * through the use of 'lspci -t'.
+ *
+ * The second format matches devices using IDs in the configuration
+ * space which may match multiple devices in the system. A value of 0
+ * for any field will match all devices. (Note: this differs from
+ * in-kernel code that uses PCI_ANY_ID which is ~0; this is for
+ * legacy reasons and convenience so users don't have to specify
+ * FFFFFFFFs on the command line.)
+ *
+ * Returns 1 if the string matches the device, 0 if it does not and
+ * a negative error code if the string cannot be parsed.
+ */
+static int pci_dev_str_match(struct pci_dev *dev, const char *p,
+ const char **endptr)
+{
+ int ret;
+ int count;
+ unsigned short vendor, device, subsystem_vendor, subsystem_device;
+
+ if (strncmp(p, "pci:", 4) == 0) {
+ /* PCI vendor/device (subvendor/subdevice) IDs are specified */
+ p += 4;
+ ret = sscanf(p, "%hx:%hx:%hx:%hx%n", &vendor, &device,
+ &subsystem_vendor, &subsystem_device, &count);
+ if (ret != 4) {
+ ret = sscanf(p, "%hx:%hx%n", &vendor, &device, &count);
+ if (ret != 2)
+ return -EINVAL;
+
+ subsystem_vendor = 0;
+ subsystem_device = 0;
+ }
+
+ p += count;
+
+ if ((!vendor || vendor == dev->vendor) &&
+ (!device || device == dev->device) &&
+ (!subsystem_vendor ||
+ subsystem_vendor == dev->subsystem_vendor) &&
+ (!subsystem_device ||
+ subsystem_device == dev->subsystem_device))
+ goto found;
+ } else {
+ /*
+ * PCI Bus, Device, Function IDs are specified
+ * (optionally, may include a path of devfns following it)
+ */
+ ret = pci_dev_str_match_path(dev, p, &p);
+ if (ret < 0)
+ return ret;
+ else if (ret)
+ goto found;
+ }
+
+ *endptr = p;
+ return 0;
+
+found:
+ *endptr = p;
+ return 1;
+}
static int __pci_find_next_cap_ttl(struct pci_bus *bus, unsigned int devfn,
u8 pos, int cap, int *ttl)
@@ -1171,6 +1335,33 @@ static void pci_restore_config_space(struct pci_dev *pdev)
}
}
+static void pci_restore_rebar_state(struct pci_dev *pdev)
+{
+ unsigned int pos, nbars, i;
+ u32 ctrl;
+
+ pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_REBAR);
+ if (!pos)
+ return;
+
+ pci_read_config_dword(pdev, pos + PCI_REBAR_CTRL, &ctrl);
+ nbars = (ctrl & PCI_REBAR_CTRL_NBAR_MASK) >>
+ PCI_REBAR_CTRL_NBAR_SHIFT;
+
+ for (i = 0; i < nbars; i++, pos += 8) {
+ struct resource *res;
+ int bar_idx, size;
+
+ pci_read_config_dword(pdev, pos + PCI_REBAR_CTRL, &ctrl);
+ bar_idx = ctrl & PCI_REBAR_CTRL_BAR_IDX;
+ res = pdev->resource + bar_idx;
+ size = order_base_2((resource_size(res) >> 20) | 1) - 1;
+ ctrl &= ~PCI_REBAR_CTRL_BAR_SIZE;
+ ctrl |= size << PCI_REBAR_CTRL_BAR_SHIFT;
+ pci_write_config_dword(pdev, pos + PCI_REBAR_CTRL, ctrl);
+ }
+}
+
/**
* pci_restore_state - Restore the saved state of a PCI device
* @dev: - PCI device that we're dealing with
@@ -1186,6 +1377,7 @@ void pci_restore_state(struct pci_dev *dev)
pci_restore_pri_state(dev);
pci_restore_ats_state(dev);
pci_restore_vc_state(dev);
+ pci_restore_rebar_state(dev);
pci_cleanup_aer_error_status_regs(dev);
@@ -2045,6 +2237,7 @@ static pci_power_t pci_target_state(struct pci_dev *dev, bool wakeup)
case PCI_D2:
if (pci_no_d1d2(dev))
break;
+ /* else: fall through */
default:
target_state = state;
}
@@ -2290,7 +2483,7 @@ void pci_config_pm_runtime_put(struct pci_dev *pdev)
* @bridge: Bridge to check
*
* This function checks if it is possible to move the bridge to D3.
- * Currently we only allow D3 for recent enough PCIe ports.
+ * Currently we only allow D3 for recent enough PCIe ports and Thunderbolt.
*/
bool pci_bridge_d3_possible(struct pci_dev *bridge)
{
@@ -2305,18 +2498,27 @@ bool pci_bridge_d3_possible(struct pci_dev *bridge)
return false;
/*
- * Hotplug interrupts cannot be delivered if the link is down,
- * so parents of a hotplug port must stay awake. In addition,
- * hotplug ports handled by firmware in System Management Mode
+ * Hotplug ports handled by firmware in System Management Mode
* may not be put into D3 by the OS (Thunderbolt on non-Macs).
- * For simplicity, disallow in general for now.
*/
- if (bridge->is_hotplug_bridge)
+ if (bridge->is_hotplug_bridge && !pciehp_is_native(bridge))
return false;
if (pci_bridge_d3_force)
return true;
+ /* Even the oldest 2010 Thunderbolt controller supports D3. */
+ if (bridge->is_thunderbolt)
+ return true;
+
+ /*
+ * Hotplug ports handled natively by the OS were not validated
+ * by vendors for runtime D3 at least until 2018 because there
+ * was no OS support.
+ */
+ if (bridge->is_hotplug_bridge)
+ return false;
+
/*
* It should be safe to put PCIe ports from 2015 or newer
* to D3.
@@ -2820,6 +3022,66 @@ void pci_request_acs(void)
pci_acs_enable = 1;
}
+static const char *disable_acs_redir_param;
+
+/**
+ * pci_disable_acs_redir - disable ACS redirect capabilities
+ * @dev: the PCI device
+ *
+ * For only devices specified in the disable_acs_redir parameter.
+ */
+static void pci_disable_acs_redir(struct pci_dev *dev)
+{
+ int ret = 0;
+ const char *p;
+ int pos;
+ u16 ctrl;
+
+ if (!disable_acs_redir_param)
+ return;
+
+ p = disable_acs_redir_param;
+ while (*p) {
+ ret = pci_dev_str_match(dev, p, &p);
+ if (ret < 0) {
+ pr_info_once("PCI: Can't parse disable_acs_redir parameter: %s\n",
+ disable_acs_redir_param);
+
+ break;
+ } else if (ret == 1) {
+ /* Found a match */
+ break;
+ }
+
+ if (*p != ';' && *p != ',') {
+ /* End of param or invalid format */
+ break;
+ }
+ p++;
+ }
+
+ if (ret != 1)
+ return;
+
+ if (!pci_dev_specific_disable_acs_redir(dev))
+ return;
+
+ pos = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ACS);
+ if (!pos) {
+ pci_warn(dev, "cannot disable ACS redirect for this hardware as it does not have ACS capabilities\n");
+ return;
+ }
+
+ pci_read_config_word(dev, pos + PCI_ACS_CTRL, &ctrl);
+
+ /* P2P Request & Completion Redirect */
+ ctrl &= ~(PCI_ACS_RR | PCI_ACS_CR | PCI_ACS_EC);
+
+ pci_write_config_word(dev, pos + PCI_ACS_CTRL, ctrl);
+
+ pci_info(dev, "disabled ACS redirect\n");
+}
+
/**
* pci_std_enable_acs - enable ACS on devices using standard ACS capabilites
* @dev: the PCI device
@@ -2859,12 +3121,22 @@ static void pci_std_enable_acs(struct pci_dev *dev)
void pci_enable_acs(struct pci_dev *dev)
{
if (!pci_acs_enable)
- return;
+ goto disable_acs_redir;
if (!pci_dev_specific_enable_acs(dev))
- return;
+ goto disable_acs_redir;
pci_std_enable_acs(dev);
+
+disable_acs_redir:
+ /*
+ * Note: pci_disable_acs_redir() must be called even if ACS was not
+ * enabled by the kernel because it may have been enabled by
+ * platform firmware. So if we are told to disable it, we should
+ * always disable it after setting the kernel's default
+ * preferences.
+ */
+ pci_disable_acs_redir(dev);
}
static bool pci_acs_flags_enabled(struct pci_dev *pdev, u16 acs_flags)
@@ -3070,7 +3342,7 @@ int pci_rebar_get_current_size(struct pci_dev *pdev, int bar)
return pos;
pci_read_config_dword(pdev, pos + PCI_REBAR_CTRL, &ctrl);
- return (ctrl & PCI_REBAR_CTRL_BAR_SIZE) >> 8;
+ return (ctrl & PCI_REBAR_CTRL_BAR_SIZE) >> PCI_REBAR_CTRL_BAR_SHIFT;
}
/**
@@ -3093,7 +3365,7 @@ int pci_rebar_set_size(struct pci_dev *pdev, int bar, int size)
pci_read_config_dword(pdev, pos + PCI_REBAR_CTRL, &ctrl);
ctrl &= ~PCI_REBAR_CTRL_BAR_SIZE;
- ctrl |= size << 8;
+ ctrl |= size << PCI_REBAR_CTRL_BAR_SHIFT;
pci_write_config_dword(pdev, pos + PCI_REBAR_CTRL, ctrl);
return 0;
}
@@ -4077,7 +4349,7 @@ static int pci_dev_wait(struct pci_dev *dev, char *reset_type, int timeout)
* Returns true if the device advertises support for PCIe function level
* resets.
*/
-static bool pcie_has_flr(struct pci_dev *dev)
+bool pcie_has_flr(struct pci_dev *dev)
{
u32 cap;
@@ -4087,6 +4359,7 @@ static bool pcie_has_flr(struct pci_dev *dev)
pcie_capability_read_dword(dev, PCI_EXP_DEVCAP, &cap);
return cap & PCI_EXP_DEVCAP_FLR;
}
+EXPORT_SYMBOL_GPL(pcie_has_flr);
/**
* pcie_flr - initiate a PCIe function level reset
@@ -4262,19 +4535,18 @@ void __weak pcibios_reset_secondary_bus(struct pci_dev *dev)
}
/**
- * pci_reset_bridge_secondary_bus - Reset the secondary bus on a PCI bridge.
+ * pci_bridge_secondary_bus_reset - Reset the secondary bus on a PCI bridge.
* @dev: Bridge device
*
* Use the bridge control register to assert reset on the secondary bus.
* Devices on the secondary bus are left in power-on state.
*/
-int pci_reset_bridge_secondary_bus(struct pci_dev *dev)
+int pci_bridge_secondary_bus_reset(struct pci_dev *dev)
{
pcibios_reset_secondary_bus(dev);
return pci_dev_wait(dev, "bus reset", PCIE_RESET_READY_POLL_MS);
}
-EXPORT_SYMBOL_GPL(pci_reset_bridge_secondary_bus);
static int pci_parent_bus_reset(struct pci_dev *dev, int probe)
{
@@ -4291,9 +4563,7 @@ static int pci_parent_bus_reset(struct pci_dev *dev, int probe)
if (probe)
return 0;
- pci_reset_bridge_secondary_bus(dev->bus->self);
-
- return 0;
+ return pci_bridge_secondary_bus_reset(dev->bus->self);
}
static int pci_reset_hotplug_slot(struct hotplug_slot *hotplug, int probe)
@@ -4825,7 +5095,7 @@ int pci_probe_reset_slot(struct pci_slot *slot)
EXPORT_SYMBOL_GPL(pci_probe_reset_slot);
/**
- * pci_reset_slot - reset a PCI slot
+ * __pci_reset_slot - Try to reset a PCI slot
* @slot: PCI slot to reset
*
* A PCI bus may host multiple slots, each slot may support a reset mechanism
@@ -4837,33 +5107,9 @@ EXPORT_SYMBOL_GPL(pci_probe_reset_slot);
* through this function. PCI config space of all devices in the slot and
* behind the slot is saved before and restored after reset.
*
- * Return 0 on success, non-zero on error.
- */
-int pci_reset_slot(struct pci_slot *slot)
-{
- int rc;
-
- rc = pci_slot_reset(slot, 1);
- if (rc)
- return rc;
-
- pci_slot_save_and_disable(slot);
-
- rc = pci_slot_reset(slot, 0);
-
- pci_slot_restore(slot);
-
- return rc;
-}
-EXPORT_SYMBOL_GPL(pci_reset_slot);
-
-/**
- * pci_try_reset_slot - Try to reset a PCI slot
- * @slot: PCI slot to reset
- *
* Same as above except return -EAGAIN if the slot cannot be locked
*/
-int pci_try_reset_slot(struct pci_slot *slot)
+static int __pci_reset_slot(struct pci_slot *slot)
{
int rc;
@@ -4884,10 +5130,11 @@ int pci_try_reset_slot(struct pci_slot *slot)
return rc;
}
-EXPORT_SYMBOL_GPL(pci_try_reset_slot);
static int pci_bus_reset(struct pci_bus *bus, int probe)
{
+ int ret;
+
if (!bus->self || !pci_bus_resetable(bus))
return -ENOTTY;
@@ -4898,11 +5145,11 @@ static int pci_bus_reset(struct pci_bus *bus, int probe)
might_sleep();
- pci_reset_bridge_secondary_bus(bus->self);
+ ret = pci_bridge_secondary_bus_reset(bus->self);
pci_bus_unlock(bus);
- return 0;
+ return ret;
}
/**
@@ -4918,15 +5165,12 @@ int pci_probe_reset_bus(struct pci_bus *bus)
EXPORT_SYMBOL_GPL(pci_probe_reset_bus);
/**
- * pci_reset_bus - reset a PCI bus
+ * __pci_reset_bus - Try to reset a PCI bus
* @bus: top level PCI bus to reset
*
- * Do a bus reset on the given bus and any subordinate buses, saving
- * and restoring state of all devices.
- *
- * Return 0 on success, non-zero on error.
+ * Same as above except return -EAGAIN if the bus cannot be locked
*/
-int pci_reset_bus(struct pci_bus *bus)
+static int __pci_reset_bus(struct pci_bus *bus)
{
int rc;
@@ -4936,42 +5180,30 @@ int pci_reset_bus(struct pci_bus *bus)
pci_bus_save_and_disable(bus);
- rc = pci_bus_reset(bus, 0);
+ if (pci_bus_trylock(bus)) {
+ might_sleep();
+ rc = pci_bridge_secondary_bus_reset(bus->self);
+ pci_bus_unlock(bus);
+ } else
+ rc = -EAGAIN;
pci_bus_restore(bus);
return rc;
}
-EXPORT_SYMBOL_GPL(pci_reset_bus);
/**
- * pci_try_reset_bus - Try to reset a PCI bus
- * @bus: top level PCI bus to reset
+ * pci_reset_bus - Try to reset a PCI bus
+ * @pdev: top level PCI device to reset via slot/bus
*
* Same as above except return -EAGAIN if the bus cannot be locked
*/
-int pci_try_reset_bus(struct pci_bus *bus)
+int pci_reset_bus(struct pci_dev *pdev)
{
- int rc;
-
- rc = pci_bus_reset(bus, 1);
- if (rc)
- return rc;
-
- pci_bus_save_and_disable(bus);
-
- if (pci_bus_trylock(bus)) {
- might_sleep();
- pci_reset_bridge_secondary_bus(bus->self);
- pci_bus_unlock(bus);
- } else
- rc = -EAGAIN;
-
- pci_bus_restore(bus);
-
- return rc;
+ return pci_probe_reset_slot(pdev->slot) ?
+ __pci_reset_slot(pdev->slot) : __pci_reset_bus(pdev->bus);
}
-EXPORT_SYMBOL_GPL(pci_try_reset_bus);
+EXPORT_SYMBOL_GPL(pci_reset_bus);
/**
* pcix_get_max_mmrbc - get PCI-X maximum designed memory read byte count
@@ -5304,14 +5536,16 @@ u32 pcie_bandwidth_capable(struct pci_dev *dev, enum pci_bus_speed *speed,
}
/**
- * pcie_print_link_status - Report the PCI device's link speed and width
+ * __pcie_print_link_status - Report the PCI device's link speed and width
* @dev: PCI device to query
+ * @verbose: Print info even when enough bandwidth is available
*
- * Report the available bandwidth at the device. If this is less than the
- * device is capable of, report the device's maximum possible bandwidth and
- * the upstream link that limits its performance to less than that.
+ * If the available bandwidth at the device is less than the device is
+ * capable of, report the device's maximum possible bandwidth and the
+ * upstream link that limits its performance. If @verbose, always print
+ * the available bandwidth, even if the device isn't constrained.
*/
-void pcie_print_link_status(struct pci_dev *dev)
+void __pcie_print_link_status(struct pci_dev *dev, bool verbose)
{
enum pcie_link_width width, width_cap;
enum pci_bus_speed speed, speed_cap;
@@ -5321,11 +5555,11 @@ void pcie_print_link_status(struct pci_dev *dev)
bw_cap = pcie_bandwidth_capable(dev, &speed_cap, &width_cap);
bw_avail = pcie_bandwidth_available(dev, &limiting_dev, &speed, &width);
- if (bw_avail >= bw_cap)
+ if (bw_avail >= bw_cap && verbose)
pci_info(dev, "%u.%03u Gb/s available PCIe bandwidth (%s x%d link)\n",
bw_cap / 1000, bw_cap % 1000,
PCIE_SPEED2STR(speed_cap), width_cap);
- else
+ else if (bw_avail < bw_cap)
pci_info(dev, "%u.%03u Gb/s available PCIe bandwidth, limited by %s x%d link at %s (capable of %u.%03u Gb/s with %s x%d link)\n",
bw_avail / 1000, bw_avail % 1000,
PCIE_SPEED2STR(speed), width,
@@ -5333,6 +5567,17 @@ void pcie_print_link_status(struct pci_dev *dev)
bw_cap / 1000, bw_cap % 1000,
PCIE_SPEED2STR(speed_cap), width_cap);
}
+
+/**
+ * pcie_print_link_status - Report the PCI device's link speed and width
+ * @dev: PCI device to query
+ *
+ * Report the available bandwidth at the device.
+ */
+void pcie_print_link_status(struct pci_dev *dev)
+{
+ __pcie_print_link_status(dev, true);
+}
EXPORT_SYMBOL(pcie_print_link_status);
/**
@@ -5427,8 +5672,19 @@ int pci_set_vga_state(struct pci_dev *dev, bool decode,
* @dev: the PCI device for which alias is added
* @devfn: alias slot and function
*
- * This helper encodes 8-bit devfn as bit number in dma_alias_mask.
- * It should be called early, preferably as PCI fixup header quirk.
+ * This helper encodes an 8-bit devfn as a bit number in dma_alias_mask
+ * which is used to program permissible bus-devfn source addresses for DMA
+ * requests in an IOMMU. These aliases factor into IOMMU group creation
+ * and are useful for devices generating DMA requests beyond or different
+ * from their logical bus-devfn. Examples include device quirks where the
+ * device simply uses the wrong devfn, as well as non-transparent bridges
+ * where the alias may be a proxy for devices in another domain.
+ *
+ * IOMMU group creation is performed during device discovery or addition,
+ * prior to any potential DMA mapping and therefore prior to driver probing
+ * (especially for userspace assigned devices where IOMMU group definition
+ * cannot be left as a userspace activity). DMA aliases should therefore
+ * be configured via quirks, such as the PCI fixup header quirk.
*/
void pci_add_dma_alias(struct pci_dev *dev, u8 devfn)
{
@@ -5494,10 +5750,10 @@ static DEFINE_SPINLOCK(resource_alignment_lock);
static resource_size_t pci_specified_resource_alignment(struct pci_dev *dev,
bool *resize)
{
- int seg, bus, slot, func, align_order, count;
- unsigned short vendor, device, subsystem_vendor, subsystem_device;
+ int align_order, count;
resource_size_t align = pcibios_default_alignment();
- char *p;
+ const char *p;
+ int ret;
spin_lock(&resource_alignment_lock);
p = resource_alignment_param;
@@ -5517,58 +5773,21 @@ static resource_size_t pci_specified_resource_alignment(struct pci_dev *dev,
} else {
align_order = -1;
}
- if (strncmp(p, "pci:", 4) == 0) {
- /* PCI vendor/device (subvendor/subdevice) ids are specified */
- p += 4;
- if (sscanf(p, "%hx:%hx:%hx:%hx%n",
- &vendor, &device, &subsystem_vendor, &subsystem_device, &count) != 4) {
- if (sscanf(p, "%hx:%hx%n", &vendor, &device, &count) != 2) {
- printk(KERN_ERR "PCI: Can't parse resource_alignment parameter: pci:%s\n",
- p);
- break;
- }
- subsystem_vendor = subsystem_device = 0;
- }
- p += count;
- if ((!vendor || (vendor == dev->vendor)) &&
- (!device || (device == dev->device)) &&
- (!subsystem_vendor || (subsystem_vendor == dev->subsystem_vendor)) &&
- (!subsystem_device || (subsystem_device == dev->subsystem_device))) {
- *resize = true;
- if (align_order == -1)
- align = PAGE_SIZE;
- else
- align = 1 << align_order;
- /* Found */
- break;
- }
- }
- else {
- if (sscanf(p, "%x:%x:%x.%x%n",
- &seg, &bus, &slot, &func, &count) != 4) {
- seg = 0;
- if (sscanf(p, "%x:%x.%x%n",
- &bus, &slot, &func, &count) != 3) {
- /* Invalid format */
- printk(KERN_ERR "PCI: Can't parse resource_alignment parameter: %s\n",
- p);
- break;
- }
- }
- p += count;
- if (seg == pci_domain_nr(dev->bus) &&
- bus == dev->bus->number &&
- slot == PCI_SLOT(dev->devfn) &&
- func == PCI_FUNC(dev->devfn)) {
- *resize = true;
- if (align_order == -1)
- align = PAGE_SIZE;
- else
- align = 1 << align_order;
- /* Found */
- break;
- }
+
+ ret = pci_dev_str_match(dev, p, &p);
+ if (ret == 1) {
+ *resize = true;
+ if (align_order == -1)
+ align = PAGE_SIZE;
+ else
+ align = 1 << align_order;
+ break;
+ } else if (ret < 0) {
+ pr_err("PCI: Can't parse resource_alignment parameter: %s\n",
+ p);
+ break;
}
+
if (*p != ';' && *p != ',') {
/* End of param or invalid format */
break;
@@ -5845,6 +6064,8 @@ static int __init pci_setup(char *str)
pcie_ats_disabled = true;
} else if (!strcmp(str, "noaer")) {
pci_no_aer();
+ } else if (!strcmp(str, "earlydump")) {
+ pci_early_dump = true;
} else if (!strncmp(str, "realloc=", 8)) {
pci_realloc_get_opt(str + 8);
} else if (!strncmp(str, "realloc", 7)) {
@@ -5881,6 +6102,8 @@ static int __init pci_setup(char *str)
pcie_bus_config = PCIE_BUS_PEER2PEER;
} else if (!strncmp(str, "pcie_scan_all", 13)) {
pci_add_flags(PCI_SCAN_ALL_PCIE_DEVS);
+ } else if (!strncmp(str, "disable_acs_redir=", 18)) {
+ disable_acs_redir_param = str + 18;
} else {
printk(KERN_ERR "PCI: Unknown option `%s'\n",
str);
diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index 08817253c8a2..6e0d1528d471 100644
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -7,6 +7,7 @@
#define PCI_VSEC_ID_INTEL_TBT 0x1234 /* Thunderbolt */
extern const unsigned char pcie_link_speed[];
+extern bool pci_early_dump;
bool pcie_cap_has_lnkctl(const struct pci_dev *dev);
@@ -33,6 +34,7 @@ int pci_mmap_fits(struct pci_dev *pdev, int resno, struct vm_area_struct *vmai,
enum pci_mmap_api mmap_api);
int pci_probe_reset_function(struct pci_dev *dev);
+int pci_bridge_secondary_bus_reset(struct pci_dev *dev);
/**
* struct pci_platform_pm_ops - Firmware PM callbacks
@@ -225,6 +227,10 @@ enum pci_bar_type {
int pci_configure_extended_tags(struct pci_dev *dev, void *ign);
bool pci_bus_read_dev_vendor_id(struct pci_bus *bus, int devfn, u32 *pl,
int crs_timeout);
+bool pci_bus_generic_read_dev_vendor_id(struct pci_bus *bus, int devfn, u32 *pl,
+ int crs_timeout);
+int pci_idt_bus_quirk(struct pci_bus *bus, int devfn, u32 *pl, int crs_timeout);
+
int pci_setup_device(struct pci_dev *dev);
int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type,
struct resource *res, unsigned int reg);
@@ -259,6 +265,7 @@ enum pci_bus_speed pcie_get_speed_cap(struct pci_dev *dev);
enum pcie_link_width pcie_get_width_cap(struct pci_dev *dev);
u32 pcie_bandwidth_capable(struct pci_dev *dev, enum pci_bus_speed *speed,
enum pcie_link_width *width);
+void __pcie_print_link_status(struct pci_dev *dev, bool verbose);
/* Single Root I/O Virtualization */
struct pci_sriov {
@@ -311,6 +318,34 @@ static inline bool pci_dev_is_added(const struct pci_dev *dev)
return test_bit(PCI_DEV_ADDED, &dev->priv_flags);
}
+#ifdef CONFIG_PCIEAER
+#include <linux/aer.h>
+
+#define AER_MAX_MULTI_ERR_DEVICES 5 /* Not likely to have more */
+
+struct aer_err_info {
+ struct pci_dev *dev[AER_MAX_MULTI_ERR_DEVICES];
+ int error_dev_num;
+
+ unsigned int id:16;
+
+ unsigned int severity:2; /* 0:NONFATAL | 1:FATAL | 2:COR */
+ unsigned int __pad1:5;
+ unsigned int multi_error_valid:1;
+
+ unsigned int first_error:5;
+ unsigned int __pad2:2;
+ unsigned int tlp_header_valid:1;
+
+ unsigned int status; /* COR/UNCOR Error Status */
+ unsigned int mask; /* COR/UNCOR Error Mask */
+ struct aer_header_log_regs tlp; /* TLP Header */
+};
+
+int aer_get_device_error_info(struct pci_dev *dev, struct aer_err_info *info);
+void aer_print_error(struct pci_dev *dev, struct aer_err_info *info);
+#endif /* CONFIG_PCIEAER */
+
#ifdef CONFIG_PCI_ATS
void pci_restore_ats_state(struct pci_dev *dev);
#else
@@ -367,6 +402,25 @@ static inline resource_size_t pci_resource_alignment(struct pci_dev *dev,
}
void pci_enable_acs(struct pci_dev *dev);
+#ifdef CONFIG_PCI_QUIRKS
+int pci_dev_specific_acs_enabled(struct pci_dev *dev, u16 acs_flags);
+int pci_dev_specific_enable_acs(struct pci_dev *dev);
+int pci_dev_specific_disable_acs_redir(struct pci_dev *dev);
+#else
+static inline int pci_dev_specific_acs_enabled(struct pci_dev *dev,
+ u16 acs_flags)
+{
+ return -ENOTTY;
+}
+static inline int pci_dev_specific_enable_acs(struct pci_dev *dev)
+{
+ return -ENOTTY;
+}
+static inline int pci_dev_specific_disable_acs_redir(struct pci_dev *dev)
+{
+ return -ENOTTY;
+}
+#endif
/* PCI error reporting and recovery */
void pcie_do_fatal_recovery(struct pci_dev *dev, u32 service);
@@ -467,4 +521,19 @@ static inline int devm_of_pci_get_host_bridge_resources(struct device *dev,
}
#endif
+#ifdef CONFIG_PCIEAER
+void pci_no_aer(void);
+void pci_aer_init(struct pci_dev *dev);
+void pci_aer_exit(struct pci_dev *dev);
+extern const struct attribute_group aer_stats_attr_group;
+void pci_aer_clear_fatal_status(struct pci_dev *dev);
+void pci_aer_clear_device_status(struct pci_dev *dev);
+#else
+static inline void pci_no_aer(void) { }
+static inline int pci_aer_init(struct pci_dev *d) { return -ENODEV; }
+static inline void pci_aer_exit(struct pci_dev *d) { }
+static inline void pci_aer_clear_fatal_status(struct pci_dev *dev) { }
+static inline void pci_aer_clear_device_status(struct pci_dev *dev) { }
+#endif
+
#endif /* DRIVERS_PCI_H */
diff --git a/drivers/pci/pcie/aer.c b/drivers/pci/pcie/aer.c
index a2e88386af28..83180edd6ed4 100644
--- a/drivers/pci/pcie/aer.c
+++ b/drivers/pci/pcie/aer.c
@@ -31,26 +31,9 @@
#include "portdrv.h"
#define AER_ERROR_SOURCES_MAX 100
-#define AER_MAX_MULTI_ERR_DEVICES 5 /* Not likely to have more */
-struct aer_err_info {
- struct pci_dev *dev[AER_MAX_MULTI_ERR_DEVICES];
- int error_dev_num;
-
- unsigned int id:16;
-
- unsigned int severity:2; /* 0:NONFATAL | 1:FATAL | 2:COR */
- unsigned int __pad1:5;
- unsigned int multi_error_valid:1;
-
- unsigned int first_error:5;
- unsigned int __pad2:2;
- unsigned int tlp_header_valid:1;
-
- unsigned int status; /* COR/UNCOR Error Status */
- unsigned int mask; /* COR/UNCOR Error Mask */
- struct aer_header_log_regs tlp; /* TLP Header */
-};
+#define AER_MAX_TYPEOF_COR_ERRS 16 /* as per PCI_ERR_COR_STATUS */
+#define AER_MAX_TYPEOF_UNCOR_ERRS 26 /* as per PCI_ERR_UNCOR_STATUS*/
struct aer_err_source {
unsigned int status;
@@ -76,6 +59,42 @@ struct aer_rpc {
*/
};
+/* AER stats for the device */
+struct aer_stats {
+
+ /*
+ * Fields for all AER capable devices. They indicate the errors
+ * "as seen by this device". Note that this may mean that if an
+ * end point is causing problems, the AER counters may increment
+ * at its link partner (e.g. root port) because the errors will be
+ * "seen" by the link partner and not the the problematic end point
+ * itself (which may report all counters as 0 as it never saw any
+ * problems).
+ */
+ /* Counters for different type of correctable errors */
+ u64 dev_cor_errs[AER_MAX_TYPEOF_COR_ERRS];
+ /* Counters for different type of fatal uncorrectable errors */
+ u64 dev_fatal_errs[AER_MAX_TYPEOF_UNCOR_ERRS];
+ /* Counters for different type of nonfatal uncorrectable errors */
+ u64 dev_nonfatal_errs[AER_MAX_TYPEOF_UNCOR_ERRS];
+ /* Total number of ERR_COR sent by this device */
+ u64 dev_total_cor_errs;
+ /* Total number of ERR_FATAL sent by this device */
+ u64 dev_total_fatal_errs;
+ /* Total number of ERR_NONFATAL sent by this device */
+ u64 dev_total_nonfatal_errs;
+
+ /*
+ * Fields for Root ports & root complex event collectors only, these
+ * indicate the total number of ERR_COR, ERR_FATAL, and ERR_NONFATAL
+ * messages received by the root port / event collector, INCLUDING the
+ * ones that are generated internally (by the rootport itself)
+ */
+ u64 rootport_total_cor_errs;
+ u64 rootport_total_fatal_errs;
+ u64 rootport_total_nonfatal_errs;
+};
+
#define AER_LOG_TLP_MASKS (PCI_ERR_UNC_POISON_TLP| \
PCI_ERR_UNC_ECRC| \
PCI_ERR_UNC_UNSUP| \
@@ -303,12 +322,13 @@ int pcie_aer_get_firmware_first(struct pci_dev *dev)
if (!pci_is_pcie(dev))
return 0;
+ if (pcie_ports_native)
+ return 0;
+
if (!dev->__aer_firmware_first_valid)
aer_set_firmware_first(dev);
return dev->__aer_firmware_first;
}
-#define PCI_EXP_AER_FLAGS (PCI_EXP_DEVCTL_CERE | PCI_EXP_DEVCTL_NFERE | \
- PCI_EXP_DEVCTL_FERE | PCI_EXP_DEVCTL_URRE)
static bool aer_firmware_first;
@@ -323,6 +343,9 @@ bool aer_acpi_firmware_first(void)
.firmware_first = 0,
};
+ if (pcie_ports_native)
+ return false;
+
if (!parsed) {
apei_hest_parse(aer_hest_parse, &info);
aer_firmware_first = info.firmware_first;
@@ -357,16 +380,30 @@ int pci_disable_pcie_error_reporting(struct pci_dev *dev)
}
EXPORT_SYMBOL_GPL(pci_disable_pcie_error_reporting);
+void pci_aer_clear_device_status(struct pci_dev *dev)
+{
+ u16 sta;
+
+ pcie_capability_read_word(dev, PCI_EXP_DEVSTA, &sta);
+ pcie_capability_write_word(dev, PCI_EXP_DEVSTA, sta);
+}
+
int pci_cleanup_aer_uncorrect_error_status(struct pci_dev *dev)
{
int pos;
- u32 status;
+ u32 status, sev;
pos = dev->aer_cap;
if (!pos)
return -EIO;
+ if (pcie_aer_get_firmware_first(dev))
+ return -EIO;
+
+ /* Clear status bits for ERR_NONFATAL errors only */
pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_STATUS, &status);
+ pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_SEVER, &sev);
+ status &= ~sev;
if (status)
pci_write_config_dword(dev, pos + PCI_ERR_UNCOR_STATUS, status);
@@ -374,6 +411,26 @@ int pci_cleanup_aer_uncorrect_error_status(struct pci_dev *dev)
}
EXPORT_SYMBOL_GPL(pci_cleanup_aer_uncorrect_error_status);
+void pci_aer_clear_fatal_status(struct pci_dev *dev)
+{
+ int pos;
+ u32 status, sev;
+
+ pos = dev->aer_cap;
+ if (!pos)
+ return;
+
+ if (pcie_aer_get_firmware_first(dev))
+ return;
+
+ /* Clear status bits for ERR_FATAL errors only */
+ pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_STATUS, &status);
+ pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_SEVER, &sev);
+ status &= sev;
+ if (status)
+ pci_write_config_dword(dev, pos + PCI_ERR_UNCOR_STATUS, status);
+}
+
int pci_cleanup_aer_error_status_regs(struct pci_dev *dev)
{
int pos;
@@ -387,6 +444,9 @@ int pci_cleanup_aer_error_status_regs(struct pci_dev *dev)
if (!pos)
return -EIO;
+ if (pcie_aer_get_firmware_first(dev))
+ return -EIO;
+
port_type = pci_pcie_type(dev);
if (port_type == PCI_EXP_TYPE_ROOT_PORT) {
pci_read_config_dword(dev, pos + PCI_ERR_ROOT_STATUS, &status);
@@ -402,10 +462,20 @@ int pci_cleanup_aer_error_status_regs(struct pci_dev *dev)
return 0;
}
-int pci_aer_init(struct pci_dev *dev)
+void pci_aer_init(struct pci_dev *dev)
{
dev->aer_cap = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ERR);
- return pci_cleanup_aer_error_status_regs(dev);
+
+ if (dev->aer_cap)
+ dev->aer_stats = kzalloc(sizeof(struct aer_stats), GFP_KERNEL);
+
+ pci_cleanup_aer_error_status_regs(dev);
+}
+
+void pci_aer_exit(struct pci_dev *dev)
+{
+ kfree(dev->aer_stats);
+ dev->aer_stats = NULL;
}
#define AER_AGENT_RECEIVER 0
@@ -458,52 +528,52 @@ static const char *aer_error_layer[] = {
"Transaction Layer"
};
-static const char *aer_correctable_error_string[] = {
- "Receiver Error", /* Bit Position 0 */
+static const char *aer_correctable_error_string[AER_MAX_TYPEOF_COR_ERRS] = {
+ "RxErr", /* Bit Position 0 */
NULL,
NULL,
NULL,
NULL,
NULL,
- "Bad TLP", /* Bit Position 6 */
- "Bad DLLP", /* Bit Position 7 */
- "RELAY_NUM Rollover", /* Bit Position 8 */
+ "BadTLP", /* Bit Position 6 */
+ "BadDLLP", /* Bit Position 7 */
+ "Rollover", /* Bit Position 8 */
NULL,
NULL,
NULL,
- "Replay Timer Timeout", /* Bit Position 12 */
- "Advisory Non-Fatal", /* Bit Position 13 */
- "Corrected Internal Error", /* Bit Position 14 */
- "Header Log Overflow", /* Bit Position 15 */
+ "Timeout", /* Bit Position 12 */
+ "NonFatalErr", /* Bit Position 13 */
+ "CorrIntErr", /* Bit Position 14 */
+ "HeaderOF", /* Bit Position 15 */
};
-static const char *aer_uncorrectable_error_string[] = {
+static const char *aer_uncorrectable_error_string[AER_MAX_TYPEOF_UNCOR_ERRS] = {
"Undefined", /* Bit Position 0 */
NULL,
NULL,
NULL,
- "Data Link Protocol", /* Bit Position 4 */
- "Surprise Down Error", /* Bit Position 5 */
+ "DLP", /* Bit Position 4 */
+ "SDES", /* Bit Position 5 */
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
- "Poisoned TLP", /* Bit Position 12 */
- "Flow Control Protocol", /* Bit Position 13 */
- "Completion Timeout", /* Bit Position 14 */
- "Completer Abort", /* Bit Position 15 */
- "Unexpected Completion", /* Bit Position 16 */
- "Receiver Overflow", /* Bit Position 17 */
- "Malformed TLP", /* Bit Position 18 */
+ "TLP", /* Bit Position 12 */
+ "FCP", /* Bit Position 13 */
+ "CmpltTO", /* Bit Position 14 */
+ "CmpltAbrt", /* Bit Position 15 */
+ "UnxCmplt", /* Bit Position 16 */
+ "RxOF", /* Bit Position 17 */
+ "MalfTLP", /* Bit Position 18 */
"ECRC", /* Bit Position 19 */
- "Unsupported Request", /* Bit Position 20 */
- "ACS Violation", /* Bit Position 21 */
- "Uncorrectable Internal Error", /* Bit Position 22 */
- "MC Blocked TLP", /* Bit Position 23 */
- "AtomicOp Egress Blocked", /* Bit Position 24 */
- "TLP Prefix Blocked Error", /* Bit Position 25 */
+ "UnsupReq", /* Bit Position 20 */
+ "ACSViol", /* Bit Position 21 */
+ "UncorrIntErr", /* Bit Position 22 */
+ "BlockedTLP", /* Bit Position 23 */
+ "AtomicOpBlocked", /* Bit Position 24 */
+ "TLPBlockedErr", /* Bit Position 25 */
};
static const char *aer_agent_string[] = {
@@ -513,6 +583,144 @@ static const char *aer_agent_string[] = {
"Transmitter ID"
};
+#define aer_stats_dev_attr(name, stats_array, strings_array, \
+ total_string, total_field) \
+ static ssize_t \
+ name##_show(struct device *dev, struct device_attribute *attr, \
+ char *buf) \
+{ \
+ unsigned int i; \
+ char *str = buf; \
+ struct pci_dev *pdev = to_pci_dev(dev); \
+ u64 *stats = pdev->aer_stats->stats_array; \
+ \
+ for (i = 0; i < ARRAY_SIZE(strings_array); i++) { \
+ if (strings_array[i]) \
+ str += sprintf(str, "%s %llu\n", \
+ strings_array[i], stats[i]); \
+ else if (stats[i]) \
+ str += sprintf(str, #stats_array "_bit[%d] %llu\n",\
+ i, stats[i]); \
+ } \
+ str += sprintf(str, "TOTAL_%s %llu\n", total_string, \
+ pdev->aer_stats->total_field); \
+ return str-buf; \
+} \
+static DEVICE_ATTR_RO(name)
+
+aer_stats_dev_attr(aer_dev_correctable, dev_cor_errs,
+ aer_correctable_error_string, "ERR_COR",
+ dev_total_cor_errs);
+aer_stats_dev_attr(aer_dev_fatal, dev_fatal_errs,
+ aer_uncorrectable_error_string, "ERR_FATAL",
+ dev_total_fatal_errs);
+aer_stats_dev_attr(aer_dev_nonfatal, dev_nonfatal_errs,
+ aer_uncorrectable_error_string, "ERR_NONFATAL",
+ dev_total_nonfatal_errs);
+
+#define aer_stats_rootport_attr(name, field) \
+ static ssize_t \
+ name##_show(struct device *dev, struct device_attribute *attr, \
+ char *buf) \
+{ \
+ struct pci_dev *pdev = to_pci_dev(dev); \
+ return sprintf(buf, "%llu\n", pdev->aer_stats->field); \
+} \
+static DEVICE_ATTR_RO(name)
+
+aer_stats_rootport_attr(aer_rootport_total_err_cor,
+ rootport_total_cor_errs);
+aer_stats_rootport_attr(aer_rootport_total_err_fatal,
+ rootport_total_fatal_errs);
+aer_stats_rootport_attr(aer_rootport_total_err_nonfatal,
+ rootport_total_nonfatal_errs);
+
+static struct attribute *aer_stats_attrs[] __ro_after_init = {
+ &dev_attr_aer_dev_correctable.attr,
+ &dev_attr_aer_dev_fatal.attr,
+ &dev_attr_aer_dev_nonfatal.attr,
+ &dev_attr_aer_rootport_total_err_cor.attr,
+ &dev_attr_aer_rootport_total_err_fatal.attr,
+ &dev_attr_aer_rootport_total_err_nonfatal.attr,
+ NULL
+};
+
+static umode_t aer_stats_attrs_are_visible(struct kobject *kobj,
+ struct attribute *a, int n)
+{
+ struct device *dev = kobj_to_dev(kobj);
+ struct pci_dev *pdev = to_pci_dev(dev);
+
+ if (!pdev->aer_stats)
+ return 0;
+
+ if ((a == &dev_attr_aer_rootport_total_err_cor.attr ||
+ a == &dev_attr_aer_rootport_total_err_fatal.attr ||
+ a == &dev_attr_aer_rootport_total_err_nonfatal.attr) &&
+ pci_pcie_type(pdev) != PCI_EXP_TYPE_ROOT_PORT)
+ return 0;
+
+ return a->mode;
+}
+
+const struct attribute_group aer_stats_attr_group = {
+ .attrs = aer_stats_attrs,
+ .is_visible = aer_stats_attrs_are_visible,
+};
+
+static void pci_dev_aer_stats_incr(struct pci_dev *pdev,
+ struct aer_err_info *info)
+{
+ int status, i, max = -1;
+ u64 *counter = NULL;
+ struct aer_stats *aer_stats = pdev->aer_stats;
+
+ if (!aer_stats)
+ return;
+
+ switch (info->severity) {
+ case AER_CORRECTABLE:
+ aer_stats->dev_total_cor_errs++;
+ counter = &aer_stats->dev_cor_errs[0];
+ max = AER_MAX_TYPEOF_COR_ERRS;
+ break;
+ case AER_NONFATAL:
+ aer_stats->dev_total_nonfatal_errs++;
+ counter = &aer_stats->dev_nonfatal_errs[0];
+ max = AER_MAX_TYPEOF_UNCOR_ERRS;
+ break;
+ case AER_FATAL:
+ aer_stats->dev_total_fatal_errs++;
+ counter = &aer_stats->dev_fatal_errs[0];
+ max = AER_MAX_TYPEOF_UNCOR_ERRS;
+ break;
+ }
+
+ status = (info->status & ~info->mask);
+ for (i = 0; i < max; i++)
+ if (status & (1 << i))
+ counter[i]++;
+}
+
+static void pci_rootport_aer_stats_incr(struct pci_dev *pdev,
+ struct aer_err_source *e_src)
+{
+ struct aer_stats *aer_stats = pdev->aer_stats;
+
+ if (!aer_stats)
+ return;
+
+ if (e_src->status & PCI_ERR_ROOT_COR_RCV)
+ aer_stats->rootport_total_cor_errs++;
+
+ if (e_src->status & PCI_ERR_ROOT_UNCOR_RCV) {
+ if (e_src->status & PCI_ERR_ROOT_FATAL_RCV)
+ aer_stats->rootport_total_fatal_errs++;
+ else
+ aer_stats->rootport_total_nonfatal_errs++;
+ }
+}
+
static void __print_tlp_header(struct pci_dev *dev,
struct aer_header_log_regs *t)
{
@@ -545,9 +753,10 @@ static void __aer_print_error(struct pci_dev *dev,
pci_err(dev, " [%2d] Unknown Error Bit%s\n",
i, info->first_error == i ? " (First)" : "");
}
+ pci_dev_aer_stats_incr(dev, info);
}
-static void aer_print_error(struct pci_dev *dev, struct aer_err_info *info)
+void aer_print_error(struct pci_dev *dev, struct aer_err_info *info)
{
int layer, agent;
int id = ((dev->bus->number << 8) | dev->devfn);
@@ -799,6 +1008,7 @@ static void handle_error_source(struct pci_dev *dev, struct aer_err_info *info)
if (pos)
pci_write_config_dword(dev, pos + PCI_ERR_COR_STATUS,
info->status);
+ pci_aer_clear_device_status(dev);
} else if (info->severity == AER_NONFATAL)
pcie_do_nonfatal_recovery(dev);
else if (info->severity == AER_FATAL)
@@ -876,7 +1086,7 @@ EXPORT_SYMBOL_GPL(aer_recover_queue);
#endif
/**
- * get_device_error_info - read error status from dev and store it to info
+ * aer_get_device_error_info - read error status from dev and store it to info
* @dev: pointer to the device expected to have a error record
* @info: pointer to structure to store the error record
*
@@ -884,7 +1094,7 @@ EXPORT_SYMBOL_GPL(aer_recover_queue);
*
* Note that @info is reused among all error devices. Clear fields properly.
*/
-static int get_device_error_info(struct pci_dev *dev, struct aer_err_info *info)
+int aer_get_device_error_info(struct pci_dev *dev, struct aer_err_info *info)
{
int pos, temp;
@@ -942,11 +1152,11 @@ static inline void aer_process_err_devices(struct aer_err_info *e_info)
/* Report all before handle them, not to lost records by reset etc. */
for (i = 0; i < e_info->error_dev_num && e_info->dev[i]; i++) {
- if (get_device_error_info(e_info->dev[i], e_info))
+ if (aer_get_device_error_info(e_info->dev[i], e_info))
aer_print_error(e_info->dev[i], e_info);
}
for (i = 0; i < e_info->error_dev_num && e_info->dev[i]; i++) {
- if (get_device_error_info(e_info->dev[i], e_info))
+ if (aer_get_device_error_info(e_info->dev[i], e_info))
handle_error_source(e_info->dev[i], e_info);
}
}
@@ -962,6 +1172,8 @@ static void aer_isr_one_error(struct aer_rpc *rpc,
struct pci_dev *pdev = rpc->rpd;
struct aer_err_info *e_info = &rpc->e_info;
+ pci_rootport_aer_stats_incr(pdev, e_src);
+
/*
* There is a possibility that both correctable error and
* uncorrectable error being logged. Report correctable error first.
@@ -1305,6 +1517,7 @@ static pci_ers_result_t aer_root_reset(struct pci_dev *dev)
{
u32 reg32;
int pos;
+ int rc;
pos = dev->aer_cap;
@@ -1313,7 +1526,7 @@ static pci_ers_result_t aer_root_reset(struct pci_dev *dev)
reg32 &= ~ROOT_PORT_INTR_ON_MESG_MASK;
pci_write_config_dword(dev, pos + PCI_ERR_ROOT_COMMAND, reg32);
- pci_reset_bridge_secondary_bus(dev);
+ rc = pci_bridge_secondary_bus_reset(dev);
pci_printk(KERN_DEBUG, dev, "Root Port link has been reset\n");
/* Clear Root Error Status */
@@ -1325,7 +1538,7 @@ static pci_ers_result_t aer_root_reset(struct pci_dev *dev)
reg32 |= ROOT_PORT_INTR_ON_MESG_MASK;
pci_write_config_dword(dev, pos + PCI_ERR_ROOT_COMMAND, reg32);
- return PCI_ERS_RESULT_RECOVERED;
+ return rc ? PCI_ERS_RESULT_DISCONNECT : PCI_ERS_RESULT_RECOVERED;
}
/**
@@ -1336,20 +1549,8 @@ static pci_ers_result_t aer_root_reset(struct pci_dev *dev)
*/
static void aer_error_resume(struct pci_dev *dev)
{
- int pos;
- u32 status, mask;
- u16 reg16;
-
- /* Clean up Root device status */
- pcie_capability_read_word(dev, PCI_EXP_DEVSTA, &reg16);
- pcie_capability_write_word(dev, PCI_EXP_DEVSTA, reg16);
-
- /* Clean AER Root Error Status */
- pos = dev->aer_cap;
- pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_STATUS, &status);
- pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_SEVER, &mask);
- status &= ~mask; /* Clear corresponding nonfatal bits */
- pci_write_config_dword(dev, pos + PCI_ERR_UNCOR_STATUS, status);
+ pci_aer_clear_device_status(dev);
+ pci_cleanup_aer_uncorrect_error_status(dev);
}
static struct pcie_port_service_driver aerdriver = {
diff --git a/drivers/pci/pcie/aspm.c b/drivers/pci/pcie/aspm.c
index c687c817b47d..5326916715d2 100644
--- a/drivers/pci/pcie/aspm.c
+++ b/drivers/pci/pcie/aspm.c
@@ -1127,11 +1127,9 @@ static int pcie_aspm_set_policy(const char *val,
if (aspm_disabled)
return -EPERM;
- for (i = 0; i < ARRAY_SIZE(policy_str); i++)
- if (!strncmp(val, policy_str[i], strlen(policy_str[i])))
- break;
- if (i >= ARRAY_SIZE(policy_str))
- return -EINVAL;
+ i = sysfs_match_string(policy_str, val);
+ if (i < 0)
+ return i;
if (i == aspm_policy)
return 0;
diff --git a/drivers/pci/pcie/dpc.c b/drivers/pci/pcie/dpc.c
index 921ed979109d..f03279fc87cd 100644
--- a/drivers/pci/pcie/dpc.c
+++ b/drivers/pci/pcie/dpc.c
@@ -6,6 +6,7 @@
* Copyright (C) 2016 Intel Corp.
*/
+#include <linux/aer.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/init.h>
@@ -16,10 +17,8 @@
struct dpc_dev {
struct pcie_device *dev;
- struct work_struct work;
u16 cap_pos;
bool rp_extensions;
- u32 rp_pio_status;
u8 rp_log_size;
};
@@ -65,19 +64,13 @@ static int dpc_wait_rp_inactive(struct dpc_dev *dpc)
return 0;
}
-static void dpc_wait_link_inactive(struct dpc_dev *dpc)
-{
- struct pci_dev *pdev = dpc->dev->port;
-
- pcie_wait_for_link(pdev, false);
-}
-
static pci_ers_result_t dpc_reset_link(struct pci_dev *pdev)
{
struct dpc_dev *dpc;
struct pcie_device *pciedev;
struct device *devdpc;
- u16 cap, ctl;
+
+ u16 cap;
/*
* DPC disables the Link automatically in hardware, so it has
@@ -92,34 +85,17 @@ static pci_ers_result_t dpc_reset_link(struct pci_dev *pdev)
* Wait until the Link is inactive, then clear DPC Trigger Status
* to allow the Port to leave DPC.
*/
- dpc_wait_link_inactive(dpc);
+ pcie_wait_for_link(pdev, false);
if (dpc->rp_extensions && dpc_wait_rp_inactive(dpc))
return PCI_ERS_RESULT_DISCONNECT;
- if (dpc->rp_extensions && dpc->rp_pio_status) {
- pci_write_config_dword(pdev, cap + PCI_EXP_DPC_RP_PIO_STATUS,
- dpc->rp_pio_status);
- dpc->rp_pio_status = 0;
- }
pci_write_config_word(pdev, cap + PCI_EXP_DPC_STATUS,
PCI_EXP_DPC_STATUS_TRIGGER);
- pci_read_config_word(pdev, cap + PCI_EXP_DPC_CTL, &ctl);
- pci_write_config_word(pdev, cap + PCI_EXP_DPC_CTL,
- ctl | PCI_EXP_DPC_CTL_INT_EN);
-
return PCI_ERS_RESULT_RECOVERED;
}
-static void dpc_work(struct work_struct *work)
-{
- struct dpc_dev *dpc = container_of(work, struct dpc_dev, work);
- struct pci_dev *pdev = dpc->dev->port;
-
- /* We configure DPC so it only triggers on ERR_FATAL */
- pcie_do_fatal_recovery(pdev, PCIE_PORT_SERVICE_DPC);
-}
static void dpc_process_rp_pio_error(struct dpc_dev *dpc)
{
@@ -134,8 +110,6 @@ static void dpc_process_rp_pio_error(struct dpc_dev *dpc)
dev_err(dev, "rp_pio_status: %#010x, rp_pio_mask: %#010x\n",
status, mask);
- dpc->rp_pio_status = status;
-
pci_read_config_dword(pdev, cap + PCI_EXP_DPC_RP_PIO_SEVERITY, &sev);
pci_read_config_dword(pdev, cap + PCI_EXP_DPC_RP_PIO_SYSERROR, &syserr);
pci_read_config_dword(pdev, cap + PCI_EXP_DPC_RP_PIO_EXCEPTION, &exc);
@@ -146,15 +120,14 @@ static void dpc_process_rp_pio_error(struct dpc_dev *dpc)
pci_read_config_word(pdev, cap + PCI_EXP_DPC_STATUS, &dpc_status);
first_error = (dpc_status & 0x1f00) >> 8;
- status &= ~mask;
for (i = 0; i < ARRAY_SIZE(rp_pio_error_string); i++) {
- if (status & (1 << i))
+ if ((status & ~mask) & (1 << i))
dev_err(dev, "[%2d] %s%s\n", i, rp_pio_error_string[i],
first_error == i ? " (First)" : "");
}
if (dpc->rp_log_size < 4)
- return;
+ goto clear_status;
pci_read_config_dword(pdev, cap + PCI_EXP_DPC_RP_PIO_HEADER_LOG,
&dw0);
pci_read_config_dword(pdev, cap + PCI_EXP_DPC_RP_PIO_HEADER_LOG + 4,
@@ -167,7 +140,7 @@ static void dpc_process_rp_pio_error(struct dpc_dev *dpc)
dw0, dw1, dw2, dw3);
if (dpc->rp_log_size < 5)
- return;
+ goto clear_status;
pci_read_config_dword(pdev, cap + PCI_EXP_DPC_RP_PIO_IMPSPEC_LOG, &log);
dev_err(dev, "RP PIO ImpSpec Log %#010x\n", log);
@@ -176,43 +149,26 @@ static void dpc_process_rp_pio_error(struct dpc_dev *dpc)
cap + PCI_EXP_DPC_RP_PIO_TLPPREFIX_LOG, &prefix);
dev_err(dev, "TLP Prefix Header: dw%d, %#010x\n", i, prefix);
}
+ clear_status:
+ pci_write_config_dword(pdev, cap + PCI_EXP_DPC_RP_PIO_STATUS, status);
}
-static irqreturn_t dpc_irq(int irq, void *context)
+static irqreturn_t dpc_handler(int irq, void *context)
{
- struct dpc_dev *dpc = (struct dpc_dev *)context;
+ struct aer_err_info info;
+ struct dpc_dev *dpc = context;
struct pci_dev *pdev = dpc->dev->port;
struct device *dev = &dpc->dev->device;
- u16 cap = dpc->cap_pos, ctl, status, source, reason, ext_reason;
-
- pci_read_config_word(pdev, cap + PCI_EXP_DPC_CTL, &ctl);
-
- if (!(ctl & PCI_EXP_DPC_CTL_INT_EN) || ctl == (u16)(~0))
- return IRQ_NONE;
+ u16 cap = dpc->cap_pos, status, source, reason, ext_reason;
pci_read_config_word(pdev, cap + PCI_EXP_DPC_STATUS, &status);
-
- if (!(status & PCI_EXP_DPC_STATUS_INTERRUPT))
- return IRQ_NONE;
-
- if (!(status & PCI_EXP_DPC_STATUS_TRIGGER)) {
- pci_write_config_word(pdev, cap + PCI_EXP_DPC_STATUS,
- PCI_EXP_DPC_STATUS_INTERRUPT);
- return IRQ_HANDLED;
- }
-
- pci_write_config_word(pdev, cap + PCI_EXP_DPC_CTL,
- ctl & ~PCI_EXP_DPC_CTL_INT_EN);
-
- pci_read_config_word(pdev, cap + PCI_EXP_DPC_SOURCE_ID,
- &source);
+ pci_read_config_word(pdev, cap + PCI_EXP_DPC_SOURCE_ID, &source);
dev_info(dev, "DPC containment event, status:%#06x source:%#06x\n",
- status, source);
+ status, source);
reason = (status & PCI_EXP_DPC_STATUS_TRIGGER_RSN) >> 1;
ext_reason = (status & PCI_EXP_DPC_STATUS_TRIGGER_RSN_EXT) >> 5;
-
dev_warn(dev, "DPC %s detected, remove downstream devices\n",
(reason == 0) ? "unmasked uncorrectable error" :
(reason == 1) ? "ERR_NONFATAL" :
@@ -220,15 +176,36 @@ static irqreturn_t dpc_irq(int irq, void *context)
(ext_reason == 0) ? "RP PIO error" :
(ext_reason == 1) ? "software trigger" :
"reserved error");
+
/* show RP PIO error detail information */
if (dpc->rp_extensions && reason == 3 && ext_reason == 0)
dpc_process_rp_pio_error(dpc);
+ else if (reason == 0 && aer_get_device_error_info(pdev, &info)) {
+ aer_print_error(pdev, &info);
+ pci_cleanup_aer_uncorrect_error_status(pdev);
+ }
- pci_write_config_word(pdev, cap + PCI_EXP_DPC_STATUS,
- PCI_EXP_DPC_STATUS_INTERRUPT);
+ /* We configure DPC so it only triggers on ERR_FATAL */
+ pcie_do_fatal_recovery(pdev, PCIE_PORT_SERVICE_DPC);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t dpc_irq(int irq, void *context)
+{
+ struct dpc_dev *dpc = (struct dpc_dev *)context;
+ struct pci_dev *pdev = dpc->dev->port;
+ u16 cap = dpc->cap_pos, status;
+
+ pci_read_config_word(pdev, cap + PCI_EXP_DPC_STATUS, &status);
- schedule_work(&dpc->work);
+ if (!(status & PCI_EXP_DPC_STATUS_INTERRUPT) || status == (u16)(~0))
+ return IRQ_NONE;
+ pci_write_config_word(pdev, cap + PCI_EXP_DPC_STATUS,
+ PCI_EXP_DPC_STATUS_INTERRUPT);
+ if (status & PCI_EXP_DPC_STATUS_TRIGGER)
+ return IRQ_WAKE_THREAD;
return IRQ_HANDLED;
}
@@ -250,11 +227,11 @@ static int dpc_probe(struct pcie_device *dev)
dpc->cap_pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_DPC);
dpc->dev = dev;
- INIT_WORK(&dpc->work, dpc_work);
set_service_data(dev, dpc);
- status = devm_request_irq(device, dev->irq, dpc_irq, IRQF_SHARED,
- "pcie-dpc", dpc);
+ status = devm_request_threaded_irq(device, dev->irq, dpc_irq,
+ dpc_handler, IRQF_SHARED,
+ "pcie-dpc", dpc);
if (status) {
dev_warn(device, "request IRQ%d failed: %d\n", dev->irq,
status);
diff --git a/drivers/pci/pcie/err.c b/drivers/pci/pcie/err.c
index f02e334beb45..708fd3a0d646 100644
--- a/drivers/pci/pcie/err.c
+++ b/drivers/pci/pcie/err.c
@@ -175,9 +175,11 @@ out:
*/
static pci_ers_result_t default_reset_link(struct pci_dev *dev)
{
- pci_reset_bridge_secondary_bus(dev);
+ int rc;
+
+ rc = pci_bridge_secondary_bus_reset(dev);
pci_printk(KERN_DEBUG, dev, "downstream link has been reset\n");
- return PCI_ERS_RESULT_RECOVERED;
+ return rc ? PCI_ERS_RESULT_DISCONNECT : PCI_ERS_RESULT_RECOVERED;
}
static pci_ers_result_t reset_link(struct pci_dev *dev, u32 service)
@@ -252,6 +254,7 @@ static pci_ers_result_t broadcast_error_message(struct pci_dev *dev,
dev->error_state = state;
pci_walk_bus(dev->subordinate, cb, &result_data);
if (cb == report_resume) {
+ pci_aer_clear_device_status(dev);
pci_cleanup_aer_uncorrect_error_status(dev);
dev->error_state = pci_channel_io_normal;
}
@@ -259,15 +262,10 @@ static pci_ers_result_t broadcast_error_message(struct pci_dev *dev,
/*
* If the error is reported by an end point, we think this
* error is related to the upstream link of the end point.
+ * The error is non fatal so the bus is ok; just invoke
+ * the callback for the function that logged the error.
*/
- if (state == pci_channel_io_normal)
- /*
- * the error is non fatal so the bus is ok, just invoke
- * the callback for the function that logged the error.
- */
- cb(dev, &result_data);
- else
- pci_walk_bus(dev->bus, cb, &result_data);
+ cb(dev, &result_data);
}
return result_data.result;
@@ -317,7 +315,8 @@ void pcie_do_fatal_recovery(struct pci_dev *dev, u32 service)
* do error recovery on all subordinates of the bridge instead
* of the bridge and clear the error status of the bridge.
*/
- pci_cleanup_aer_uncorrect_error_status(dev);
+ pci_aer_clear_fatal_status(dev);
+ pci_aer_clear_device_status(dev);
}
if (result == PCI_ERS_RESULT_RECOVERED) {
diff --git a/drivers/pci/pcie/portdrv.h b/drivers/pci/pcie/portdrv.h
index 6ffc797a0dc1..d59afa42fc14 100644
--- a/drivers/pci/pcie/portdrv.h
+++ b/drivers/pci/pcie/portdrv.h
@@ -50,6 +50,7 @@ struct pcie_port_service_driver {
int (*probe) (struct pcie_device *dev);
void (*remove) (struct pcie_device *dev);
int (*suspend) (struct pcie_device *dev);
+ int (*resume_noirq) (struct pcie_device *dev);
int (*resume) (struct pcie_device *dev);
/* Device driver may resume normal operations */
@@ -82,6 +83,7 @@ extern struct bus_type pcie_port_bus_type;
int pcie_port_device_register(struct pci_dev *dev);
#ifdef CONFIG_PM
int pcie_port_device_suspend(struct device *dev);
+int pcie_port_device_resume_noirq(struct device *dev);
int pcie_port_device_resume(struct device *dev);
#endif
void pcie_port_device_remove(struct pci_dev *dev);
diff --git a/drivers/pci/pcie/portdrv_core.c b/drivers/pci/pcie/portdrv_core.c
index e0261ad4bcdd..7c37d815229e 100644
--- a/drivers/pci/pcie/portdrv_core.c
+++ b/drivers/pci/pcie/portdrv_core.c
@@ -353,14 +353,19 @@ error_disable:
}
#ifdef CONFIG_PM
-static int suspend_iter(struct device *dev, void *data)
+typedef int (*pcie_pm_callback_t)(struct pcie_device *);
+
+static int pm_iter(struct device *dev, void *data)
{
struct pcie_port_service_driver *service_driver;
+ size_t offset = *(size_t *)data;
+ pcie_pm_callback_t cb;
if ((dev->bus == &pcie_port_bus_type) && dev->driver) {
service_driver = to_service_driver(dev->driver);
- if (service_driver->suspend)
- service_driver->suspend(to_pcie_device(dev));
+ cb = *(pcie_pm_callback_t *)((void *)service_driver + offset);
+ if (cb)
+ return cb(to_pcie_device(dev));
}
return 0;
}
@@ -371,20 +376,14 @@ static int suspend_iter(struct device *dev, void *data)
*/
int pcie_port_device_suspend(struct device *dev)
{
- return device_for_each_child(dev, NULL, suspend_iter);
+ size_t off = offsetof(struct pcie_port_service_driver, suspend);
+ return device_for_each_child(dev, &off, pm_iter);
}
-static int resume_iter(struct device *dev, void *data)
+int pcie_port_device_resume_noirq(struct device *dev)
{
- struct pcie_port_service_driver *service_driver;
-
- if ((dev->bus == &pcie_port_bus_type) &&
- (dev->driver)) {
- service_driver = to_service_driver(dev->driver);
- if (service_driver->resume)
- service_driver->resume(to_pcie_device(dev));
- }
- return 0;
+ size_t off = offsetof(struct pcie_port_service_driver, resume_noirq);
+ return device_for_each_child(dev, &off, pm_iter);
}
/**
@@ -393,7 +392,8 @@ static int resume_iter(struct device *dev, void *data)
*/
int pcie_port_device_resume(struct device *dev)
{
- return device_for_each_child(dev, NULL, resume_iter);
+ size_t off = offsetof(struct pcie_port_service_driver, resume);
+ return device_for_each_child(dev, &off, pm_iter);
}
#endif /* PM */
diff --git a/drivers/pci/pcie/portdrv_pci.c b/drivers/pci/pcie/portdrv_pci.c
index 973f1b80a038..eef22dc29140 100644
--- a/drivers/pci/pcie/portdrv_pci.c
+++ b/drivers/pci/pcie/portdrv_pci.c
@@ -42,17 +42,6 @@ __setup("pcie_ports=", pcie_port_setup);
/* global data */
-static int pcie_portdrv_restore_config(struct pci_dev *dev)
-{
- int retval;
-
- retval = pci_enable_device(dev);
- if (retval)
- return retval;
- pci_set_master(dev);
- return 0;
-}
-
#ifdef CONFIG_PM
static int pcie_port_runtime_suspend(struct device *dev)
{
@@ -76,10 +65,12 @@ static int pcie_port_runtime_idle(struct device *dev)
static const struct dev_pm_ops pcie_portdrv_pm_ops = {
.suspend = pcie_port_device_suspend,
+ .resume_noirq = pcie_port_device_resume_noirq,
.resume = pcie_port_device_resume,
.freeze = pcie_port_device_suspend,
.thaw = pcie_port_device_resume,
.poweroff = pcie_port_device_suspend,
+ .restore_noirq = pcie_port_device_resume_noirq,
.restore = pcie_port_device_resume,
.runtime_suspend = pcie_port_runtime_suspend,
.runtime_resume = pcie_port_runtime_resume,
@@ -160,19 +151,6 @@ static pci_ers_result_t pcie_portdrv_mmio_enabled(struct pci_dev *dev)
return PCI_ERS_RESULT_RECOVERED;
}
-static pci_ers_result_t pcie_portdrv_slot_reset(struct pci_dev *dev)
-{
- /* If fatal, restore cfg space for possible link reset at upstream */
- if (dev->error_state == pci_channel_io_frozen) {
- dev->state_saved = true;
- pci_restore_state(dev);
- pcie_portdrv_restore_config(dev);
- pci_enable_pcie_error_reporting(dev);
- }
-
- return PCI_ERS_RESULT_RECOVERED;
-}
-
static int resume_iter(struct device *device, void *data)
{
struct pcie_device *pcie_device;
@@ -208,7 +186,6 @@ static const struct pci_device_id port_pci_ids[] = { {
static const struct pci_error_handlers pcie_portdrv_err_handler = {
.error_detected = pcie_portdrv_error_detected,
.mmio_enabled = pcie_portdrv_mmio_enabled,
- .slot_reset = pcie_portdrv_slot_reset,
.resume = pcie_portdrv_err_resume,
};
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 611adcd9c169..ec784009a36b 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -13,7 +13,6 @@
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/cpumask.h>
-#include <linux/pci-aspm.h>
#include <linux/aer.h>
#include <linux/acpi.h>
#include <linux/hypervisor.h>
@@ -1549,6 +1548,20 @@ static int pci_intx_mask_broken(struct pci_dev *dev)
return 0;
}
+static void early_dump_pci_device(struct pci_dev *pdev)
+{
+ u32 value[256 / 4];
+ int i;
+
+ pci_info(pdev, "config space:\n");
+
+ for (i = 0; i < 256; i += 4)
+ pci_read_config_dword(pdev, i, &value[i / 4]);
+
+ print_hex_dump(KERN_INFO, "", DUMP_PREFIX_OFFSET, 16, 1,
+ value, 256, false);
+}
+
/**
* pci_setup_device - Fill in class and map information of a device
* @dev: the device structure to fill
@@ -1598,6 +1611,9 @@ int pci_setup_device(struct pci_dev *dev)
pci_printk(KERN_DEBUG, dev, "[%04x:%04x] type %02x class %#08x\n",
dev->vendor, dev->device, dev->hdr_type, dev->class);
+ if (pci_early_dump)
+ early_dump_pci_device(dev);
+
/* Need to have dev->class ready */
dev->cfg_size = pci_cfg_space_size(dev);
@@ -1725,11 +1741,15 @@ int pci_setup_device(struct pci_dev *dev)
static void pci_configure_mps(struct pci_dev *dev)
{
struct pci_dev *bridge = pci_upstream_bridge(dev);
- int mps, p_mps, rc;
+ int mps, mpss, p_mps, rc;
if (!pci_is_pcie(dev) || !bridge || !pci_is_pcie(bridge))
return;
+ /* MPS and MRRS fields are of type 'RsvdP' for VFs, short-circuit out */
+ if (dev->is_virtfn)
+ return;
+
mps = pcie_get_mps(dev);
p_mps = pcie_get_mps(bridge);
@@ -1749,6 +1769,14 @@ static void pci_configure_mps(struct pci_dev *dev)
if (pcie_bus_config != PCIE_BUS_DEFAULT)
return;
+ mpss = 128 << dev->pcie_mpss;
+ if (mpss < p_mps && pci_pcie_type(bridge) == PCI_EXP_TYPE_ROOT_PORT) {
+ pcie_set_mps(bridge, mpss);
+ pci_info(dev, "Upstream bridge's Max Payload Size set to %d (was %d, max %d)\n",
+ mpss, p_mps, 128 << bridge->pcie_mpss);
+ p_mps = pcie_get_mps(bridge);
+ }
+
rc = pcie_set_mps(dev, p_mps);
if (rc) {
pci_warn(dev, "can't set Max Payload Size to %d; if necessary, use \"pci=pcie_bus_safe\" and report a bug\n",
@@ -1757,7 +1785,7 @@ static void pci_configure_mps(struct pci_dev *dev)
}
pci_info(dev, "Max Payload Size set to %d (was %d, max %d)\n",
- p_mps, mps, 128 << dev->pcie_mpss);
+ p_mps, mps, mpss);
}
static struct hpp_type0 pci_default_type0 = {
@@ -2042,6 +2070,29 @@ static void pci_configure_ltr(struct pci_dev *dev)
#endif
}
+static void pci_configure_eetlp_prefix(struct pci_dev *dev)
+{
+#ifdef CONFIG_PCI_PASID
+ struct pci_dev *bridge;
+ u32 cap;
+
+ if (!pci_is_pcie(dev))
+ return;
+
+ pcie_capability_read_dword(dev, PCI_EXP_DEVCAP2, &cap);
+ if (!(cap & PCI_EXP_DEVCAP2_EE_PREFIX))
+ return;
+
+ if (pci_pcie_type(dev) == PCI_EXP_TYPE_ROOT_PORT)
+ dev->eetlp_prefix_path = 1;
+ else {
+ bridge = pci_upstream_bridge(dev);
+ if (bridge && bridge->eetlp_prefix_path)
+ dev->eetlp_prefix_path = 1;
+ }
+#endif
+}
+
static void pci_configure_device(struct pci_dev *dev)
{
struct hotplug_params hpp;
@@ -2051,6 +2102,7 @@ static void pci_configure_device(struct pci_dev *dev)
pci_configure_extended_tags(dev, NULL);
pci_configure_relaxed_ordering(dev);
pci_configure_ltr(dev);
+ pci_configure_eetlp_prefix(dev);
memset(&hpp, 0, sizeof(hpp));
ret = pci_get_hp_params(dev, &hpp);
@@ -2064,6 +2116,7 @@ static void pci_configure_device(struct pci_dev *dev)
static void pci_release_capabilities(struct pci_dev *dev)
{
+ pci_aer_exit(dev);
pci_vpd_release(dev);
pci_iov_release(dev);
pci_free_cap_save_buffers(dev);
@@ -2156,8 +2209,8 @@ static bool pci_bus_wait_crs(struct pci_bus *bus, int devfn, u32 *l,
return true;
}
-bool pci_bus_read_dev_vendor_id(struct pci_bus *bus, int devfn, u32 *l,
- int timeout)
+bool pci_bus_generic_read_dev_vendor_id(struct pci_bus *bus, int devfn, u32 *l,
+ int timeout)
{
if (pci_bus_read_config_dword(bus, devfn, PCI_VENDOR_ID, l))
return false;
@@ -2172,6 +2225,24 @@ bool pci_bus_read_dev_vendor_id(struct pci_bus *bus, int devfn, u32 *l,
return true;
}
+
+bool pci_bus_read_dev_vendor_id(struct pci_bus *bus, int devfn, u32 *l,
+ int timeout)
+{
+#ifdef CONFIG_PCI_QUIRKS
+ struct pci_dev *bridge = bus->self;
+
+ /*
+ * Certain IDT switches have an issue where they improperly trigger
+ * ACS Source Validation errors on completions for config reads.
+ */
+ if (bridge && bridge->vendor == PCI_VENDOR_ID_IDT &&
+ bridge->device == 0x80b5)
+ return pci_idt_bus_quirk(bus, devfn, l, timeout);
+#endif
+
+ return pci_bus_generic_read_dev_vendor_id(bus, devfn, l, timeout);
+}
EXPORT_SYMBOL(pci_bus_read_dev_vendor_id);
/*
@@ -2205,6 +2276,25 @@ static struct pci_dev *pci_scan_device(struct pci_bus *bus, int devfn)
return dev;
}
+static void pcie_report_downtraining(struct pci_dev *dev)
+{
+ if (!pci_is_pcie(dev))
+ return;
+
+ /* Look from the device up to avoid downstream ports with no devices */
+ if ((pci_pcie_type(dev) != PCI_EXP_TYPE_ENDPOINT) &&
+ (pci_pcie_type(dev) != PCI_EXP_TYPE_LEG_END) &&
+ (pci_pcie_type(dev) != PCI_EXP_TYPE_UPSTREAM))
+ return;
+
+ /* Multi-function PCIe devices share the same link/status */
+ if (PCI_FUNC(dev->devfn) != 0 || dev->is_virtfn)
+ return;
+
+ /* Print link status only if the device is constrained by the fabric */
+ __pcie_print_link_status(dev, false);
+}
+
static void pci_init_capabilities(struct pci_dev *dev)
{
/* Enhanced Allocation */
@@ -2240,6 +2330,8 @@ static void pci_init_capabilities(struct pci_dev *dev)
/* Advanced Error Reporting */
pci_aer_init(dev);
+ pcie_report_downtraining(dev);
+
if (pci_probe_reset_function(dev) == 0)
dev->reset_fn = 1;
}
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index f439de848658..46f58a9771d7 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -25,8 +25,10 @@
#include <linux/sched.h>
#include <linux/ktime.h>
#include <linux/mm.h>
+#include <linux/nvme.h>
#include <linux/platform_data/x86/apple.h>
#include <linux/pm_runtime.h>
+#include <linux/switchtec.h>
#include <asm/dma.h> /* isa_dma_bridge_buggy */
#include "pci.h"
@@ -460,6 +462,7 @@ static void quirk_nfp6000(struct pci_dev *dev)
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NETRONOME, PCI_DEVICE_ID_NETRONOME_NFP4000, quirk_nfp6000);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NETRONOME, PCI_DEVICE_ID_NETRONOME_NFP6000, quirk_nfp6000);
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NETRONOME, PCI_DEVICE_ID_NETRONOME_NFP5000, quirk_nfp6000);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NETRONOME, PCI_DEVICE_ID_NETRONOME_NFP6000_VF, quirk_nfp6000);
/* On IBM Crocodile ipr SAS adapters, expand BAR to system page size */
@@ -2105,6 +2108,7 @@ static void quirk_netmos(struct pci_dev *dev)
if (dev->subsystem_vendor == PCI_VENDOR_ID_IBM &&
dev->subsystem_device == 0x0299)
return;
+ /* else: fall through */
case PCI_DEVICE_ID_NETMOS_9735:
case PCI_DEVICE_ID_NETMOS_9745:
case PCI_DEVICE_ID_NETMOS_9845:
@@ -2352,6 +2356,9 @@ static void quirk_paxc_bridge(struct pci_dev *pdev)
}
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_BROADCOM, 0x16cd, quirk_paxc_bridge);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_BROADCOM, 0x16f0, quirk_paxc_bridge);
+DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_BROADCOM, 0xd750, quirk_paxc_bridge);
+DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_BROADCOM, 0xd802, quirk_paxc_bridge);
+DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_BROADCOM, 0xd804, quirk_paxc_bridge);
#endif
/*
@@ -3664,6 +3671,108 @@ static int reset_chelsio_generic_dev(struct pci_dev *dev, int probe)
#define PCI_DEVICE_ID_INTEL_IVB_M_VGA 0x0156
#define PCI_DEVICE_ID_INTEL_IVB_M2_VGA 0x0166
+/*
+ * The Samsung SM961/PM961 controller can sometimes enter a fatal state after
+ * FLR where config space reads from the device return -1. We seem to be
+ * able to avoid this condition if we disable the NVMe controller prior to
+ * FLR. This quirk is generic for any NVMe class device requiring similar
+ * assistance to quiesce the device prior to FLR.
+ *
+ * NVMe specification: https://nvmexpress.org/resources/specifications/
+ * Revision 1.0e:
+ * Chapter 2: Required and optional PCI config registers
+ * Chapter 3: NVMe control registers
+ * Chapter 7.3: Reset behavior
+ */
+static int nvme_disable_and_flr(struct pci_dev *dev, int probe)
+{
+ void __iomem *bar;
+ u16 cmd;
+ u32 cfg;
+
+ if (dev->class != PCI_CLASS_STORAGE_EXPRESS ||
+ !pcie_has_flr(dev) || !pci_resource_start(dev, 0))
+ return -ENOTTY;
+
+ if (probe)
+ return 0;
+
+ bar = pci_iomap(dev, 0, NVME_REG_CC + sizeof(cfg));
+ if (!bar)
+ return -ENOTTY;
+
+ pci_read_config_word(dev, PCI_COMMAND, &cmd);
+ pci_write_config_word(dev, PCI_COMMAND, cmd | PCI_COMMAND_MEMORY);
+
+ cfg = readl(bar + NVME_REG_CC);
+
+ /* Disable controller if enabled */
+ if (cfg & NVME_CC_ENABLE) {
+ u32 cap = readl(bar + NVME_REG_CAP);
+ unsigned long timeout;
+
+ /*
+ * Per nvme_disable_ctrl() skip shutdown notification as it
+ * could complete commands to the admin queue. We only intend
+ * to quiesce the device before reset.
+ */
+ cfg &= ~(NVME_CC_SHN_MASK | NVME_CC_ENABLE);
+
+ writel(cfg, bar + NVME_REG_CC);
+
+ /*
+ * Some controllers require an additional delay here, see
+ * NVME_QUIRK_DELAY_BEFORE_CHK_RDY. None of those are yet
+ * supported by this quirk.
+ */
+
+ /* Cap register provides max timeout in 500ms increments */
+ timeout = ((NVME_CAP_TIMEOUT(cap) + 1) * HZ / 2) + jiffies;
+
+ for (;;) {
+ u32 status = readl(bar + NVME_REG_CSTS);
+
+ /* Ready status becomes zero on disable complete */
+ if (!(status & NVME_CSTS_RDY))
+ break;
+
+ msleep(100);
+
+ if (time_after(jiffies, timeout)) {
+ pci_warn(dev, "Timeout waiting for NVMe ready status to clear after disable\n");
+ break;
+ }
+ }
+ }
+
+ pci_iounmap(dev, bar);
+
+ pcie_flr(dev);
+
+ return 0;
+}
+
+/*
+ * Intel DC P3700 NVMe controller will timeout waiting for ready status
+ * to change after NVMe enable if the driver starts interacting with the
+ * device too soon after FLR. A 250ms delay after FLR has heuristically
+ * proven to produce reliably working results for device assignment cases.
+ */
+static int delay_250ms_after_flr(struct pci_dev *dev, int probe)
+{
+ if (!pcie_has_flr(dev))
+ return -ENOTTY;
+
+ if (probe)
+ return 0;
+
+ pcie_flr(dev);
+
+ msleep(250);
+
+ return 0;
+}
+
static const struct pci_dev_reset_methods pci_dev_reset_methods[] = {
{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82599_SFP_VF,
reset_intel_82599_sfp_virtfn },
@@ -3671,6 +3780,8 @@ static const struct pci_dev_reset_methods pci_dev_reset_methods[] = {
reset_ivb_igd },
{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IVB_M2_VGA,
reset_ivb_igd },
+ { PCI_VENDOR_ID_SAMSUNG, 0xa804, nvme_disable_and_flr },
+ { PCI_VENDOR_ID_INTEL, 0x0953, delay_250ms_after_flr },
{ PCI_VENDOR_ID_CHELSIO, PCI_ANY_ID,
reset_chelsio_generic_dev },
{ 0 }
@@ -3740,6 +3851,9 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MARVELL_EXT, 0x917a,
/* https://bugzilla.kernel.org/show_bug.cgi?id=42679#c78 */
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MARVELL_EXT, 0x9182,
quirk_dma_func1_alias);
+/* https://bugzilla.kernel.org/show_bug.cgi?id=42679#c134 */
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MARVELL_EXT, 0x9183,
+ quirk_dma_func1_alias);
/* https://bugzilla.kernel.org/show_bug.cgi?id=42679#c46 */
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MARVELL_EXT, 0x91a0,
quirk_dma_func1_alias);
@@ -4553,27 +4667,79 @@ static int pci_quirk_enable_intel_spt_pch_acs(struct pci_dev *dev)
return 0;
}
-static const struct pci_dev_enable_acs {
+static int pci_quirk_disable_intel_spt_pch_acs_redir(struct pci_dev *dev)
+{
+ int pos;
+ u32 cap, ctrl;
+
+ if (!pci_quirk_intel_spt_pch_acs_match(dev))
+ return -ENOTTY;
+
+ pos = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ACS);
+ if (!pos)
+ return -ENOTTY;
+
+ pci_read_config_dword(dev, pos + PCI_ACS_CAP, &cap);
+ pci_read_config_dword(dev, pos + INTEL_SPT_ACS_CTRL, &ctrl);
+
+ ctrl &= ~(PCI_ACS_RR | PCI_ACS_CR | PCI_ACS_EC);
+
+ pci_write_config_dword(dev, pos + INTEL_SPT_ACS_CTRL, ctrl);
+
+ pci_info(dev, "Intel SPT PCH root port workaround: disabled ACS redirect\n");
+
+ return 0;
+}
+
+static const struct pci_dev_acs_ops {
u16 vendor;
u16 device;
int (*enable_acs)(struct pci_dev *dev);
-} pci_dev_enable_acs[] = {
- { PCI_VENDOR_ID_INTEL, PCI_ANY_ID, pci_quirk_enable_intel_pch_acs },
- { PCI_VENDOR_ID_INTEL, PCI_ANY_ID, pci_quirk_enable_intel_spt_pch_acs },
- { 0 }
+ int (*disable_acs_redir)(struct pci_dev *dev);
+} pci_dev_acs_ops[] = {
+ { PCI_VENDOR_ID_INTEL, PCI_ANY_ID,
+ .enable_acs = pci_quirk_enable_intel_pch_acs,
+ },
+ { PCI_VENDOR_ID_INTEL, PCI_ANY_ID,
+ .enable_acs = pci_quirk_enable_intel_spt_pch_acs,
+ .disable_acs_redir = pci_quirk_disable_intel_spt_pch_acs_redir,
+ },
};
int pci_dev_specific_enable_acs(struct pci_dev *dev)
{
- const struct pci_dev_enable_acs *i;
- int ret;
+ const struct pci_dev_acs_ops *p;
+ int i, ret;
+
+ for (i = 0; i < ARRAY_SIZE(pci_dev_acs_ops); i++) {
+ p = &pci_dev_acs_ops[i];
+ if ((p->vendor == dev->vendor ||
+ p->vendor == (u16)PCI_ANY_ID) &&
+ (p->device == dev->device ||
+ p->device == (u16)PCI_ANY_ID) &&
+ p->enable_acs) {
+ ret = p->enable_acs(dev);
+ if (ret >= 0)
+ return ret;
+ }
+ }
- for (i = pci_dev_enable_acs; i->enable_acs; i++) {
- if ((i->vendor == dev->vendor ||
- i->vendor == (u16)PCI_ANY_ID) &&
- (i->device == dev->device ||
- i->device == (u16)PCI_ANY_ID)) {
- ret = i->enable_acs(dev);
+ return -ENOTTY;
+}
+
+int pci_dev_specific_disable_acs_redir(struct pci_dev *dev)
+{
+ const struct pci_dev_acs_ops *p;
+ int i, ret;
+
+ for (i = 0; i < ARRAY_SIZE(pci_dev_acs_ops); i++) {
+ p = &pci_dev_acs_ops[i];
+ if ((p->vendor == dev->vendor ||
+ p->vendor == (u16)PCI_ANY_ID) &&
+ (p->device == dev->device ||
+ p->device == (u16)PCI_ANY_ID) &&
+ p->disable_acs_redir) {
+ ret = p->disable_acs_redir(dev);
if (ret >= 0)
return ret;
}
@@ -4753,3 +4919,197 @@ DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_VENDOR_ID_AMD, PCI_ANY_ID,
PCI_CLASS_MULTIMEDIA_HD_AUDIO, 8, quirk_gpu_hda);
DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_VENDOR_ID_NVIDIA, PCI_ANY_ID,
PCI_CLASS_MULTIMEDIA_HD_AUDIO, 8, quirk_gpu_hda);
+
+/*
+ * Some IDT switches incorrectly flag an ACS Source Validation error on
+ * completions for config read requests even though PCIe r4.0, sec
+ * 6.12.1.1, says that completions are never affected by ACS Source
+ * Validation. Here's the text of IDT 89H32H8G3-YC, erratum #36:
+ *
+ * Item #36 - Downstream port applies ACS Source Validation to Completions
+ * Section 6.12.1.1 of the PCI Express Base Specification 3.1 states that
+ * completions are never affected by ACS Source Validation. However,
+ * completions received by a downstream port of the PCIe switch from a
+ * device that has not yet captured a PCIe bus number are incorrectly
+ * dropped by ACS Source Validation by the switch downstream port.
+ *
+ * The workaround suggested by IDT is to issue a config write to the
+ * downstream device before issuing the first config read. This allows the
+ * downstream device to capture its bus and device numbers (see PCIe r4.0,
+ * sec 2.2.9), thus avoiding the ACS error on the completion.
+ *
+ * However, we don't know when the device is ready to accept the config
+ * write, so we do config reads until we receive a non-Config Request Retry
+ * Status, then do the config write.
+ *
+ * To avoid hitting the erratum when doing the config reads, we disable ACS
+ * SV around this process.
+ */
+int pci_idt_bus_quirk(struct pci_bus *bus, int devfn, u32 *l, int timeout)
+{
+ int pos;
+ u16 ctrl = 0;
+ bool found;
+ struct pci_dev *bridge = bus->self;
+
+ pos = pci_find_ext_capability(bridge, PCI_EXT_CAP_ID_ACS);
+
+ /* Disable ACS SV before initial config reads */
+ if (pos) {
+ pci_read_config_word(bridge, pos + PCI_ACS_CTRL, &ctrl);
+ if (ctrl & PCI_ACS_SV)
+ pci_write_config_word(bridge, pos + PCI_ACS_CTRL,
+ ctrl & ~PCI_ACS_SV);
+ }
+
+ found = pci_bus_generic_read_dev_vendor_id(bus, devfn, l, timeout);
+
+ /* Write Vendor ID (read-only) so the endpoint latches its bus/dev */
+ if (found)
+ pci_bus_write_config_word(bus, devfn, PCI_VENDOR_ID, 0);
+
+ /* Re-enable ACS_SV if it was previously enabled */
+ if (ctrl & PCI_ACS_SV)
+ pci_write_config_word(bridge, pos + PCI_ACS_CTRL, ctrl);
+
+ return found;
+}
+
+/*
+ * Microsemi Switchtec NTB uses devfn proxy IDs to move TLPs between
+ * NT endpoints via the internal switch fabric. These IDs replace the
+ * originating requestor ID TLPs which access host memory on peer NTB
+ * ports. Therefore, all proxy IDs must be aliased to the NTB device
+ * to permit access when the IOMMU is turned on.
+ */
+static void quirk_switchtec_ntb_dma_alias(struct pci_dev *pdev)
+{
+ void __iomem *mmio;
+ struct ntb_info_regs __iomem *mmio_ntb;
+ struct ntb_ctrl_regs __iomem *mmio_ctrl;
+ struct sys_info_regs __iomem *mmio_sys_info;
+ u64 partition_map;
+ u8 partition;
+ int pp;
+
+ if (pci_enable_device(pdev)) {
+ pci_err(pdev, "Cannot enable Switchtec device\n");
+ return;
+ }
+
+ mmio = pci_iomap(pdev, 0, 0);
+ if (mmio == NULL) {
+ pci_disable_device(pdev);
+ pci_err(pdev, "Cannot iomap Switchtec device\n");
+ return;
+ }
+
+ pci_info(pdev, "Setting Switchtec proxy ID aliases\n");
+
+ mmio_ntb = mmio + SWITCHTEC_GAS_NTB_OFFSET;
+ mmio_ctrl = (void __iomem *) mmio_ntb + SWITCHTEC_NTB_REG_CTRL_OFFSET;
+ mmio_sys_info = mmio + SWITCHTEC_GAS_SYS_INFO_OFFSET;
+
+ partition = ioread8(&mmio_ntb->partition_id);
+
+ partition_map = ioread32(&mmio_ntb->ep_map);
+ partition_map |= ((u64) ioread32(&mmio_ntb->ep_map + 4)) << 32;
+ partition_map &= ~(1ULL << partition);
+
+ for (pp = 0; pp < (sizeof(partition_map) * 8); pp++) {
+ struct ntb_ctrl_regs __iomem *mmio_peer_ctrl;
+ u32 table_sz = 0;
+ int te;
+
+ if (!(partition_map & (1ULL << pp)))
+ continue;
+
+ pci_dbg(pdev, "Processing partition %d\n", pp);
+
+ mmio_peer_ctrl = &mmio_ctrl[pp];
+
+ table_sz = ioread16(&mmio_peer_ctrl->req_id_table_size);
+ if (!table_sz) {
+ pci_warn(pdev, "Partition %d table_sz 0\n", pp);
+ continue;
+ }
+
+ if (table_sz > 512) {
+ pci_warn(pdev,
+ "Invalid Switchtec partition %d table_sz %d\n",
+ pp, table_sz);
+ continue;
+ }
+
+ for (te = 0; te < table_sz; te++) {
+ u32 rid_entry;
+ u8 devfn;
+
+ rid_entry = ioread32(&mmio_peer_ctrl->req_id_table[te]);
+ devfn = (rid_entry >> 1) & 0xFF;
+ pci_dbg(pdev,
+ "Aliasing Partition %d Proxy ID %02x.%d\n",
+ pp, PCI_SLOT(devfn), PCI_FUNC(devfn));
+ pci_add_dma_alias(pdev, devfn);
+ }
+ }
+
+ pci_iounmap(pdev, mmio);
+ pci_disable_device(pdev);
+}
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_MICROSEMI, 0x8531,
+ quirk_switchtec_ntb_dma_alias);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_MICROSEMI, 0x8532,
+ quirk_switchtec_ntb_dma_alias);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_MICROSEMI, 0x8533,
+ quirk_switchtec_ntb_dma_alias);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_MICROSEMI, 0x8534,
+ quirk_switchtec_ntb_dma_alias);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_MICROSEMI, 0x8535,
+ quirk_switchtec_ntb_dma_alias);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_MICROSEMI, 0x8536,
+ quirk_switchtec_ntb_dma_alias);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_MICROSEMI, 0x8543,
+ quirk_switchtec_ntb_dma_alias);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_MICROSEMI, 0x8544,
+ quirk_switchtec_ntb_dma_alias);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_MICROSEMI, 0x8545,
+ quirk_switchtec_ntb_dma_alias);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_MICROSEMI, 0x8546,
+ quirk_switchtec_ntb_dma_alias);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_MICROSEMI, 0x8551,
+ quirk_switchtec_ntb_dma_alias);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_MICROSEMI, 0x8552,
+ quirk_switchtec_ntb_dma_alias);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_MICROSEMI, 0x8553,
+ quirk_switchtec_ntb_dma_alias);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_MICROSEMI, 0x8554,
+ quirk_switchtec_ntb_dma_alias);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_MICROSEMI, 0x8555,
+ quirk_switchtec_ntb_dma_alias);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_MICROSEMI, 0x8556,
+ quirk_switchtec_ntb_dma_alias);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_MICROSEMI, 0x8561,
+ quirk_switchtec_ntb_dma_alias);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_MICROSEMI, 0x8562,
+ quirk_switchtec_ntb_dma_alias);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_MICROSEMI, 0x8563,
+ quirk_switchtec_ntb_dma_alias);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_MICROSEMI, 0x8564,
+ quirk_switchtec_ntb_dma_alias);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_MICROSEMI, 0x8565,
+ quirk_switchtec_ntb_dma_alias);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_MICROSEMI, 0x8566,
+ quirk_switchtec_ntb_dma_alias);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_MICROSEMI, 0x8571,
+ quirk_switchtec_ntb_dma_alias);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_MICROSEMI, 0x8572,
+ quirk_switchtec_ntb_dma_alias);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_MICROSEMI, 0x8573,
+ quirk_switchtec_ntb_dma_alias);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_MICROSEMI, 0x8574,
+ quirk_switchtec_ntb_dma_alias);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_MICROSEMI, 0x8575,
+ quirk_switchtec_ntb_dma_alias);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_MICROSEMI, 0x8576,
+ quirk_switchtec_ntb_dma_alias);
diff --git a/drivers/pci/remove.c b/drivers/pci/remove.c
index 5e3d0dced2b8..461e7fd2756f 100644
--- a/drivers/pci/remove.c
+++ b/drivers/pci/remove.c
@@ -1,7 +1,6 @@
// SPDX-License-Identifier: GPL-2.0
#include <linux/pci.h>
#include <linux/module.h>
-#include <linux/pci-aspm.h>
#include "pci.h"
static void pci_free_resources(struct pci_dev *dev)
diff --git a/drivers/pci/rom.c b/drivers/pci/rom.c
index a7b5c37a85ec..137bf0cee897 100644
--- a/drivers/pci/rom.c
+++ b/drivers/pci/rom.c
@@ -80,7 +80,8 @@ EXPORT_SYMBOL_GPL(pci_disable_rom);
* The PCI window size could be much larger than the
* actual image size.
*/
-size_t pci_get_rom_size(struct pci_dev *pdev, void __iomem *rom, size_t size)
+static size_t pci_get_rom_size(struct pci_dev *pdev, void __iomem *rom,
+ size_t size)
{
void __iomem *image;
int last_image;
@@ -106,8 +107,14 @@ size_t pci_get_rom_size(struct pci_dev *pdev, void __iomem *rom, size_t size)
length = readw(pds + 16);
image += length * 512;
/* Avoid iterating through memory outside the resource window */
- if (image > rom + size)
+ if (image >= rom + size)
break;
+ if (!last_image) {
+ if (readw(image) != 0xAA55) {
+ pci_info(pdev, "No more image in the PCI ROM\n");
+ break;
+ }
+ }
} while (length && !last_image);
/* never return a size larger than the PCI resource window */
diff --git a/drivers/pci/switch/switchtec.c b/drivers/pci/switch/switchtec.c
index 47cd0c037433..9940cc70f38b 100644
--- a/drivers/pci/switch/switchtec.c
+++ b/drivers/pci/switch/switchtec.c
@@ -641,7 +641,7 @@ static int ioctl_event_summary(struct switchtec_dev *stdev,
for (i = 0; i < SWITCHTEC_MAX_PFF_CSR; i++) {
reg = ioread16(&stdev->mmio_pff_csr[i].vendor_id);
- if (reg != MICROSEMI_VENDOR_ID)
+ if (reg != PCI_VENDOR_ID_MICROSEMI)
break;
reg = ioread32(&stdev->mmio_pff_csr[i].pff_event_summary);
@@ -1203,7 +1203,7 @@ static void init_pff(struct switchtec_dev *stdev)
for (i = 0; i < SWITCHTEC_MAX_PFF_CSR; i++) {
reg = ioread16(&stdev->mmio_pff_csr[i].vendor_id);
- if (reg != MICROSEMI_VENDOR_ID)
+ if (reg != PCI_VENDOR_ID_MICROSEMI)
break;
}
@@ -1267,7 +1267,7 @@ static int switchtec_pci_probe(struct pci_dev *pdev,
struct switchtec_dev *stdev;
int rc;
- if (pdev->class == MICROSEMI_NTB_CLASSCODE)
+ if (pdev->class == (PCI_CLASS_BRIDGE_OTHER << 8))
request_module_nowait("ntb_hw_switchtec");
stdev = stdev_create(pdev);
@@ -1321,19 +1321,19 @@ static void switchtec_pci_remove(struct pci_dev *pdev)
#define SWITCHTEC_PCI_DEVICE(device_id) \
{ \
- .vendor = MICROSEMI_VENDOR_ID, \
+ .vendor = PCI_VENDOR_ID_MICROSEMI, \
.device = device_id, \
.subvendor = PCI_ANY_ID, \
.subdevice = PCI_ANY_ID, \
- .class = MICROSEMI_MGMT_CLASSCODE, \
+ .class = (PCI_CLASS_MEMORY_OTHER << 8), \
.class_mask = 0xFFFFFFFF, \
}, \
{ \
- .vendor = MICROSEMI_VENDOR_ID, \
+ .vendor = PCI_VENDOR_ID_MICROSEMI, \
.device = device_id, \
.subvendor = PCI_ANY_ID, \
.subdevice = PCI_ANY_ID, \
- .class = MICROSEMI_NTB_CLASSCODE, \
+ .class = (PCI_CLASS_BRIDGE_OTHER << 8), \
.class_mask = 0xFFFFFFFF, \
}
diff --git a/drivers/pci/vpd.c b/drivers/pci/vpd.c
index 8617565ba561..4963c2e2bd4c 100644
--- a/drivers/pci/vpd.c
+++ b/drivers/pci/vpd.c
@@ -146,7 +146,7 @@ static int pci_vpd_wait(struct pci_dev *dev)
if (!vpd->busy)
return 0;
- while (time_before(jiffies, timeout)) {
+ do {
ret = pci_user_read_config_word(dev, vpd->cap + PCI_VPD_ADDR,
&status);
if (ret < 0)
@@ -160,10 +160,13 @@ static int pci_vpd_wait(struct pci_dev *dev)
if (fatal_signal_pending(current))
return -EINTR;
+ if (time_after(jiffies, timeout))
+ break;
+
usleep_range(10, max_sleep);
if (max_sleep < 1024)
max_sleep *= 2;
- }
+ } while (true);
pci_warn(dev, "VPD access failed. This is likely a firmware bug on this device. Contact the card vendor for a firmware update\n");
return -ETIMEDOUT;