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Diffstat (limited to 'arch/mips/mach-octeon/include/mach/cvmx-pcie.h')
-rw-r--r--arch/mips/mach-octeon/include/mach/cvmx-pcie.h279
1 files changed, 279 insertions, 0 deletions
diff --git a/arch/mips/mach-octeon/include/mach/cvmx-pcie.h b/arch/mips/mach-octeon/include/mach/cvmx-pcie.h
new file mode 100644
index 0000000000..a819196c02
--- /dev/null
+++ b/arch/mips/mach-octeon/include/mach/cvmx-pcie.h
@@ -0,0 +1,279 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2020 Marvell International Ltd.
+ */
+
+#ifndef __CVMX_PCIE_H__
+#define __CVMX_PCIE_H__
+
+#define CVMX_PCIE_MAX_PORTS 4
+#define CVMX_PCIE_PORTS \
+ ((OCTEON_IS_MODEL(OCTEON_CN78XX) || OCTEON_IS_MODEL(OCTEON_CN73XX)) ? \
+ CVMX_PCIE_MAX_PORTS : \
+ (OCTEON_IS_MODEL(OCTEON_CN70XX) ? 3 : 2))
+
+/*
+ * The physical memory base mapped by BAR1. 256MB at the end of the
+ * first 4GB.
+ */
+#define CVMX_PCIE_BAR1_PHYS_BASE ((1ull << 32) - (1ull << 28))
+#define CVMX_PCIE_BAR1_PHYS_SIZE BIT_ULL(28)
+
+/*
+ * The RC base of BAR1. gen1 has a 39-bit BAR2, gen2 has 41-bit BAR2,
+ * place BAR1 so it is the same for both.
+ */
+#define CVMX_PCIE_BAR1_RC_BASE BIT_ULL(41)
+
+typedef union {
+ u64 u64;
+ struct {
+ u64 upper : 2; /* Normally 2 for XKPHYS */
+ u64 reserved_49_61 : 13; /* Must be zero */
+ u64 io : 1; /* 1 for IO space access */
+ u64 did : 5; /* PCIe DID = 3 */
+ u64 subdid : 3; /* PCIe SubDID = 1 */
+ u64 reserved_38_39 : 2; /* Must be zero */
+ u64 node : 2; /* Numa node number */
+ u64 es : 2; /* Endian swap = 1 */
+ u64 port : 2; /* PCIe port 0,1 */
+ u64 reserved_29_31 : 3; /* Must be zero */
+ u64 ty : 1;
+ u64 bus : 8;
+ u64 dev : 5;
+ u64 func : 3;
+ u64 reg : 12;
+ } config;
+ struct {
+ u64 upper : 2; /* Normally 2 for XKPHYS */
+ u64 reserved_49_61 : 13; /* Must be zero */
+ u64 io : 1; /* 1 for IO space access */
+ u64 did : 5; /* PCIe DID = 3 */
+ u64 subdid : 3; /* PCIe SubDID = 2 */
+ u64 reserved_38_39 : 2; /* Must be zero */
+ u64 node : 2; /* Numa node number */
+ u64 es : 2; /* Endian swap = 1 */
+ u64 port : 2; /* PCIe port 0,1 */
+ u64 address : 32; /* PCIe IO address */
+ } io;
+ struct {
+ u64 upper : 2; /* Normally 2 for XKPHYS */
+ u64 reserved_49_61 : 13; /* Must be zero */
+ u64 io : 1; /* 1 for IO space access */
+ u64 did : 5; /* PCIe DID = 3 */
+ u64 subdid : 3; /* PCIe SubDID = 3-6 */
+ u64 reserved_38_39 : 2; /* Must be zero */
+ u64 node : 2; /* Numa node number */
+ u64 address : 36; /* PCIe Mem address */
+ } mem;
+} cvmx_pcie_address_t;
+
+/**
+ * Return the Core virtual base address for PCIe IO access. IOs are
+ * read/written as an offset from this address.
+ *
+ * @param pcie_port PCIe port the IO is for
+ *
+ * @return 64bit Octeon IO base address for read/write
+ */
+u64 cvmx_pcie_get_io_base_address(int pcie_port);
+
+/**
+ * Size of the IO address region returned at address
+ * cvmx_pcie_get_io_base_address()
+ *
+ * @param pcie_port PCIe port the IO is for
+ *
+ * @return Size of the IO window
+ */
+u64 cvmx_pcie_get_io_size(int pcie_port);
+
+/**
+ * Return the Core virtual base address for PCIe MEM access. Memory is
+ * read/written as an offset from this address.
+ *
+ * @param pcie_port PCIe port the IO is for
+ *
+ * @return 64bit Octeon IO base address for read/write
+ */
+u64 cvmx_pcie_get_mem_base_address(int pcie_port);
+
+/**
+ * Size of the Mem address region returned at address
+ * cvmx_pcie_get_mem_base_address()
+ *
+ * @param pcie_port PCIe port the IO is for
+ *
+ * @return Size of the Mem window
+ */
+u64 cvmx_pcie_get_mem_size(int pcie_port);
+
+/**
+ * Initialize a PCIe port for use in host(RC) mode. It doesn't enumerate the bus.
+ *
+ * @param pcie_port PCIe port to initialize
+ *
+ * @return Zero on success
+ */
+int cvmx_pcie_rc_initialize(int pcie_port);
+
+/**
+ * Shutdown a PCIe port and put it in reset
+ *
+ * @param pcie_port PCIe port to shutdown
+ *
+ * @return Zero on success
+ */
+int cvmx_pcie_rc_shutdown(int pcie_port);
+
+/**
+ * Read 8bits from a Device's config space
+ *
+ * @param pcie_port PCIe port the device is on
+ * @param bus Sub bus
+ * @param dev Device ID
+ * @param fn Device sub function
+ * @param reg Register to access
+ *
+ * @return Result of the read
+ */
+u8 cvmx_pcie_config_read8(int pcie_port, int bus, int dev, int fn, int reg);
+
+/**
+ * Read 16bits from a Device's config space
+ *
+ * @param pcie_port PCIe port the device is on
+ * @param bus Sub bus
+ * @param dev Device ID
+ * @param fn Device sub function
+ * @param reg Register to access
+ *
+ * @return Result of the read
+ */
+u16 cvmx_pcie_config_read16(int pcie_port, int bus, int dev, int fn, int reg);
+
+/**
+ * Read 32bits from a Device's config space
+ *
+ * @param pcie_port PCIe port the device is on
+ * @param bus Sub bus
+ * @param dev Device ID
+ * @param fn Device sub function
+ * @param reg Register to access
+ *
+ * @return Result of the read
+ */
+u32 cvmx_pcie_config_read32(int pcie_port, int bus, int dev, int fn, int reg);
+
+/**
+ * Write 8bits to a Device's config space
+ *
+ * @param pcie_port PCIe port the device is on
+ * @param bus Sub bus
+ * @param dev Device ID
+ * @param fn Device sub function
+ * @param reg Register to access
+ * @param val Value to write
+ */
+void cvmx_pcie_config_write8(int pcie_port, int bus, int dev, int fn, int reg, u8 val);
+
+/**
+ * Write 16bits to a Device's config space
+ *
+ * @param pcie_port PCIe port the device is on
+ * @param bus Sub bus
+ * @param dev Device ID
+ * @param fn Device sub function
+ * @param reg Register to access
+ * @param val Value to write
+ */
+void cvmx_pcie_config_write16(int pcie_port, int bus, int dev, int fn, int reg, u16 val);
+
+/**
+ * Write 32bits to a Device's config space
+ *
+ * @param pcie_port PCIe port the device is on
+ * @param bus Sub bus
+ * @param dev Device ID
+ * @param fn Device sub function
+ * @param reg Register to access
+ * @param val Value to write
+ */
+void cvmx_pcie_config_write32(int pcie_port, int bus, int dev, int fn, int reg, u32 val);
+
+/**
+ * Read a PCIe config space register indirectly. This is used for
+ * registers of the form PCIEEP_CFG??? and PCIERC?_CFG???.
+ *
+ * @param pcie_port PCIe port to read from
+ * @param cfg_offset Address to read
+ *
+ * @return Value read
+ */
+u32 cvmx_pcie_cfgx_read(int pcie_port, u32 cfg_offset);
+u32 cvmx_pcie_cfgx_read_node(int node, int pcie_port, u32 cfg_offset);
+
+/**
+ * Write a PCIe config space register indirectly. This is used for
+ * registers of the form PCIEEP_CFG??? and PCIERC?_CFG???.
+ *
+ * @param pcie_port PCIe port to write to
+ * @param cfg_offset Address to write
+ * @param val Value to write
+ */
+void cvmx_pcie_cfgx_write(int pcie_port, u32 cfg_offset, u32 val);
+void cvmx_pcie_cfgx_write_node(int node, int pcie_port, u32 cfg_offset, u32 val);
+
+/**
+ * Write a 32bit value to the Octeon NPEI register space
+ *
+ * @param address Address to write to
+ * @param val Value to write
+ */
+static inline void cvmx_pcie_npei_write32(u64 address, u32 val)
+{
+ cvmx_write64_uint32(address ^ 4, val);
+ cvmx_read64_uint32(address ^ 4);
+}
+
+/**
+ * Read a 32bit value from the Octeon NPEI register space
+ *
+ * @param address Address to read
+ * @return The result
+ */
+static inline u32 cvmx_pcie_npei_read32(u64 address)
+{
+ return cvmx_read64_uint32(address ^ 4);
+}
+
+/**
+ * Initialize a PCIe port for use in target(EP) mode.
+ *
+ * @param pcie_port PCIe port to initialize
+ *
+ * @return Zero on success
+ */
+int cvmx_pcie_ep_initialize(int pcie_port);
+
+/**
+ * Wait for posted PCIe read/writes to reach the other side of
+ * the internal PCIe switch. This will insure that core
+ * read/writes are posted before anything after this function
+ * is called. This may be necessary when writing to memory that
+ * will later be read using the DMA/PKT engines.
+ *
+ * @param pcie_port PCIe port to wait for
+ */
+void cvmx_pcie_wait_for_pending(int pcie_port);
+
+/**
+ * Returns if a PCIe port is in host or target mode.
+ *
+ * @param pcie_port PCIe port number (PEM number)
+ *
+ * @return 0 if PCIe port is in target mode, !0 if in host mode.
+ */
+int cvmx_pcie_is_host_mode(int pcie_port);
+
+#endif
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