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path: root/include/pci.h
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2020-05-15pci: Fix typo in definition for PCI_DEVSimon Glass
Fix a typo in the comment. Signed-off-by: Simon Glass <sjg@chromium.org>
2020-04-24pci: Add a macro to convert BDF from linux to U-BootSimon Glass
U-Boot's BDF format has its bits in the same position as the device tree PCI definition. Some x86 devices use linux format in their register format and it is useful to be able to convert to U-Boot format. Add a macro for this. Signed-off-by: Simon Glass <sjg@chromium.org>
2020-02-13pci: definition of pci_addr_t and pci_size_tHeinrich Schuchardt
Currently the size of pci_addr_t and pci_size_t depends on CONFIG_SYS_PCI_64BIT. For qemu_arm64_defconfig with 4 GiB RAM this leads to an error pci_hose_phys_to_bus: invalid physical address which is due to the truncation of the bus address in _dm_pci_phys_to_bus. Defining CONFIG_SYS_PCI_64BIT is not a solution as this results in an error PCI: Failed autoconfig bar 10 So let's use unsigned long for pci_addr_t and pci_size_t if CONFIG_SYS_PCI_64BIT is not defined. Considering that 32bit U-Boot is used to launch some 64bit x86 systems we cannot do without CONFIG_SYS_PCI_64BIT requiring u64 as type. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Reviewed-by: Simon Glass <sjg@chromium.org>
2020-02-05dm: pci: Update a few more interfaces for const udevice *Simon Glass
Tidy up a few places where const * should be used. Signed-off-by: Simon Glass <sjg@chromium.org>
2020-02-05dm: pci: Update the PCI read_config() method to const dev *Simon Glass
At present this method uses a non-const udevice pointer, but the call should not modify the device. Use a const pointer. Signed-off-by: Simon Glass <sjg@chromium.org>
2019-12-15dm: pci: Move pci_get_devfn() into a common fileSimon Glass
Early in boot it is necessary to decode the PCI device/function values for particular peripherals in the device tree or of-platdata. This is needed in TPL where CONFIG_PCI is not defined. To handle this, move pci_get_devfn() into a file that is built even when CONFIG_PCI is not defined. Also add a function for use by of-platdata, to convert a reg property to a pci_dev_t. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2019-12-15dm: pci: Allow delaying auto-config until after relocationSimon Glass
At present PCI auto-configuration happens in U-Boot both before and after relocation. This is a waste of time and may mess up static addresses used in board_init_f(). Adjust the code to supporting doing auto-configuration once, after relocation, under control of a device-tree property. This is needed for Apollo Lake for debugging the silicon-init code. Once the UART is moved to a different MMIO address the debug UART does not work and any debug output in Apollo Lake's arch_fsp_init_r() causes a hang. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2019-10-11sandbox: pci: Remember the device being emulatedSimon Glass
Add a field to the PCI emulator per-device data which records which device is being emulated. This is useful when the emulator needs to check the device for something. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Tested-by: Bin Meng <bmeng.cn@gmail.com> [bmeng: rebase the patch against u-boot-x86/master to get it applied cleanly] Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
2019-10-08pci: Correct 'specifified' and 'Plese' typosSimon Glass
Fix these spelling errors the header file and documentation. Fix a small typo in the PCI documentation. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2019-10-08sandbox: pci: Move pci_offset_to_barnum() to pci.hSimon Glass
This function is useful in PCI emulators. More it into the header file to avoid duplicating it in other drivers. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2019-10-08sandbox: pci: Drop the get_devfn() methodSimon Glass
This method is not used anymore since the bus/device/function of PCI devices can be obtained from their (parent's per-child) platform data. Drop it. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2019-07-10drivers: pci: add API to issue FLR on a PCI function if supportedAlex Marginean
Adds dm_pci_flr API that issues a Function Level reset on a PCI-e function, if FLR is supported. Signed-off-by: Alex Marginean <alexm.osslist@gmail.com> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2019-07-10drivers: pci: add map_bar support for Enhanced AllocationAlex Marginean
Makes dm_pci_map_bar API available for integrated PCI devices that support Enhanced Allocation instead of the original PCI BAR mechanism. Signed-off-by: Alex Marginean <alexm.osslist@gmail.com> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2019-07-10pci: fixed dm_pci_map_bar commentAlex Marginean
The comment now indicates that the input argument bar is a register offset, not a BAR index. It also mentions which BARs are supported for type 0/1 and that the function can return 0 on error. Signed-off-by: Alex Marginean <alexm.osslist@gmail.com> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2019-05-08Revert "pci: Scale MAX_PCI_REGIONS based on CONFIG_NR_DRAM_BANKS"Simon Glass
This reverts commit aec4298ccb337106fd0115b91d846a022fdf301d. Unfortunately this has a dramatic impact on the pre-relocation memory used on x86 platforms (increasing it by 2KB) since it increases the overhead for each PCI device from 220 bytes to 412 bytes. The offending line is in UCLASS_DRIVER(pci): .per_device_auto_alloc_size = sizeof(struct pci_controller), This means that all PCI devices have the controller struct associated with them. The solution is to move the regions[] member out of the array, makes its size dynamic, or split UCLASS_PCI into controllers and non-controllers, as the comment suggests. For now, revert the commit to get things running again. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2019-04-24Merge tag 'pull-24apr19' of git://git.denx.de/u-boot-dmTom Rini
Various minor sandbox iumprovements Fixes for tracing with sandbox Refactoring for boot_get_fdt()
2019-04-23pci: pci.h: add missing maskbitRamon Fried
PCI_MSI_FLAGS_MASKBIT was missing from include file, add it. Signed-off-by: Ramon Fried <ramon.fried@gmail.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2019-04-23pci: Scale MAX_PCI_REGIONS based on CONFIG_NR_DRAM_BANKSThierry Reding
If a platform defines CONFIG_NR_DRAM_BANKS, each DRAM bank will be added as a PCI region. The number of MAX_PCI_REGIONS therefore needs to scale with the number of DRAM banks, otherwise we will end up with too little space in the hose->regions array to store all system memory regions. Signed-off-by: Thierry Reding <treding@nvidia.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2019-03-22pci: Add comment to mention difference in DEVFN usage in U-Boot vs LinuxStefan Roese
This patch adds a comment to the header with the PCI_foo macros related to DEVFN to explain the difference in U-Boot vs Linux. Signed-off-by: Stefan Roese <sr@denx.de> Cc: Simon Glass <sjg@chromium.org> Cc: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2019-02-20pci: Fix comment in struct pci_child_platdataSimon Glass
This is platdata, not private data, so the comment is currently incorrect. Fix it to avoid confusion. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2019-02-20pci: Don't export pci_hose_config_device()Simon Glass
This function is not used outside this file so make it static. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2019-02-05pci: Add pci_get_devfn() to extract devfn from the fdt_pci_addrStefan Roese
This function will be used by the Marvell Armada XP/38x PCIe driver, which is moved to DM right now. So let's extract the functionality from pci_uclass_child_post_bind() to make it available. Signed-off-by: Stefan Roese <sr@denx.de> Reviewed-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2018-11-14dm: pci: Add APIs to find next capability and extended capabilityBin Meng
This introduces two new APIs dm_pci_find_next_capability() and dm_pci_find_next_ext_capability() to get PCI capability address and PCI express extended capability address for a given PCI device starting from a given offset. Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2018-08-08dm: pci: Add APIs to find capability and extended capabilityBin Meng
This introduces two new APIs dm_pci_find_capability() and dm_pci_find_ext_capability() to get PCI capability address and PCI express extended capability address for a given PCI device. Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2018-08-08pci: Add all known capability and extended capability idsBin Meng
Currently we don't have a complete list of capability and extended capability ids. This adds them. Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2018-08-08pci: sandbox: Support dynamically binding device driverBin Meng
At present all emulated sandbox pci devices must be present in the device tree in order to be used. The real world pci uclass driver supports pci device driver matching, and we should add such support on sandbox too. Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2018-08-08pci: Remove 440ep-specific macrosBin Meng
These macros should not be put in the generic pci.h header file. Since they are not referenced anywhere, remove them completely. Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2018-05-26PCI: Document pciauto_region_allocate()Tuomas Tynkkynen
Add a doc comment for pciauto_region_allocate(). Signed-off-by: Tuomas Tynkkynen <tuomas.tynkkynen@iki.fi> Reviewed-by: Simon Glass <sjg@chromium.org>
2018-05-26PCI: autoconfig: Don't allocate 64-bit addresses to 32-bit only resourcesTuomas Tynkkynen
Currently, if we happen to allocate an address requiring 64 bits to a device only supporting 32-bit BARs, the address eventually gets silently truncated to 32 bits. Avoid this by adding a new flag to pciauto_region_allocate() to bail out in such situations. Signed-off-by: Tuomas Tynkkynen <tuomas.tynkkynen@iki.fi> Reviewed-by: Simon Glass <sjg@chromium.org>
2018-05-07SPDX: Convert all of our single license tags to Linux Kernel styleTom Rini
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
2018-03-19pci: Remove unused ppc4xx variable from struct pci_controllerStefan Roese
ppc4xx support was removed some time ago. Lets remove the now unused "pci_fb" variable from "struct pci_controller" as well. Signed-off-by: Stefan Roese <sr@denx.de> Cc: Bin Meng <bmeng.cn@gmail.com> Cc: Simon Glass <sjg@chromium.org>
2017-10-06pci: Add helper for implementing memory-mapped config space accessesTuomas Tynkkynen
This sort of pattern for implementing memory-mapped PCI config space accesses appears in U-Boot twice already, and a third user is coming up. So add helper functions to avoid code duplication, similar to how Linux has pci_generic_config_write and pci_generic_config_read. Signed-off-by: Tuomas Tynkkynen <tuomas.tynkkynen@iki.fi> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2017-05-31drivers: pci: imx: add imx_pcie_remove functionTim Harvey
There is no dedicated reset signal wired up for the MX6QDL thus if the bootloader enables the link we need some special handling to get the core back into a state where it is safe to touch it for configuration. While there has been some special handling in the Linux kernel to do this, it was removed in 4.11 thus we need to do it properly in the bootloader and therefore without this if you enable PCI in the bootloader you will hang while booting the 4.11 kernel. This puts the PCIe controller back into a safe state for the kernel driver before launching the kernel. Signed-off-by: Tim Harvey <tharvey@gateworks.com> Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com> Tested-by: Peter Senna Tschudin <peter.senna@collabora.com>
2016-03-21pci: make pci_get_hose_head() available to external usersStuart Yoder
Put pci_get_hose_head() prototype in header so it is available to external users, allowing them to find and iterate over all pci controllers. Signed-off-by: Stuart Yoder <stuart.yoder@nxp.com> Reviewed-by: York Sun <york.sun@nxp.com>
2016-03-17pci: Correct a few comments and nitsSimon Glass
Two comments are missing a parameter and there is an extra blank line. Also two of the region access macros are misnamed. Correct these problems. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2016-03-17pci: Add functions to update PCI configuration registersSimon Glass
It is common to read a config register value, clear and set some bits, then write back the updated value. Add functions to do this in one step, for convenience. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2016-02-05dm: pci: Add missing forward declarationsBin Meng
When CONFIG_DM_PCI_COMPAT is not on, there is only a forward declaration for pci_write_config32(). Add other missing ones. Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2016-01-24dm: pci: Add a function to write a BARSimon Glass
Add a driver-model version of the pci_write_bar32 function so that this is supported in the new API. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2016-01-12dm: pci: Switch to DM API for PCI address mappingSimon Glass
We should use the new address mapping functions unless we are in compatibility mode. Disable the old functions by default. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2016-01-12dm: pci: Add driver model API functions for address mappingSimon Glass
At present the PCI address map functions use the old API. Add new functions for this so that drivers can be converted. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2016-01-12dm: pci: Add a function to read a PCI BARSimon Glass
Add a driver-model function for reading the PCI BAR from a device. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2016-01-12dm: pci: Add a driver-model version of pci_find_class()Simon Glass
Add a function which scans the driver model device information rather than scanning the PCI bus again. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Tested-by: Bin Meng <bmeng.cn@gmail.com>
2016-01-12dm: pci: Add a driver-model version of pci_find_device()Simon Glass
Add a function which scans the driver model device information rather than scanning the PCI bus again. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Tested-by: Bin Meng <bmeng.cn@gmail.com>
2016-01-12dm: pci: Use driver model PCI API in auto-configSimon Glass
At present we are using legacy functions even in the auto-configuration code used by driver model. Add a new pci_auto.c version which uses the correct API. Create a new pci_internal.h header to hold functions that are used within the PCI subsystem, but are not exported to other drivers. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Tested-by: Bin Meng <bmeng.cn@gmail.com>
2016-01-12dm: pci: Add a dm_ prefix to pci_bus_find_bdf()Simon Glass
Most driver model PCI functions have a dm_ prefix. At some point, when the old code is converted to driver model and the old functions are removed, we will drop that prefix. For consistency, we should use the dm_ prefix for all driver model functions. Update pci_bus_find_bdf() accordingly. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2016-01-12dm: pci: Add a dm_ prefix to pci_get_bdf()Simon Glass
Most driver model PCI functions have a dm_ prefix. At some point, when the old code is converted to driver model and the old functions are removed, we will drop that prefix. For consistency, we should use the dm_ prefix for all driver model functions. Update pci_get_bdf() accordingly. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2015-12-01dm: pci: Disable PCI compatibility functions by defaultSimon Glass
We eventually need to drop the compatibility functions for driver model. As a first step, create a configuration option to enable them and hide them when the option is disabled. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2015-12-01dm: pci: Add a comment about how to find struct pci_controllerSimon Glass
With driver mode, struct pci_controller is stored as uclass-private data. Add a comment to that effect. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2015-12-01dm: pci: Add a function to find the regions for a PCI busSimon Glass
This function looks up the controller and returns a pointer to each region type. Signed-off-by: Simon Glass <sjg@chromium.org> Acked-by: Stephen Warren <swarren@nvidia.com> Tested-by: Stephen Warren <swarren@nvidia.com>
2015-12-01dm: pci: Add a function to get the controller for a busSimon Glass
A PCI bus may be a bridge device where the controller is the bridge's parent. Add a function to return the controller device, given a PCI device. Signed-off-by: Simon Glass <sjg@chromium.org> Acked-by: Stephen Warren <swarren@nvidia.com> Tested-by: Stephen Warren <swarren@nvidia.com>