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path: root/drivers/pci/vpd.c
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2023-08-11PCI/VPD: Add runtime power management to sysfs interfaceAlex Williamson
Unlike default access to config space through sysfs, the VPD read and write functions don't actively manage the runtime power management state of the device during access. Since commit 7ab5e10eda02 ("vfio/pci: Move the unused device into low power state with runtime PM"), the vfio-pci driver will use runtime power management and release unused devices to make use of low power states. Attempting to access VPD information in D3cold can result in incorrect information or kernel crashes depending on the system behavior. Wrap the VPD read/write bin attribute handlers in runtime PM and take into account the potential quirk to select the correct device to wake. Link: https://lore.kernel.org/r/20230803171233.3810944-2-alex.williamson@redhat.com Signed-off-by: Alex Williamson <alex.williamson@redhat.com> [bhelgaas: tweak pci_dev_put() test to match the pci_get_func0_dev() test] Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2021-10-25PCI/VPD: Use pci_read_vpd_any() in pci_vpd_size()Heiner Kallweit
Use new function pci_read_vpd_any() to simplify the code. [bhelgaas: squash in fix for stack overflow reported & tested by Qian [1] and Kunihiko [2]: [1] https://lore.kernel.org/netdev/e89087c5-c495-c5ca-feb1-54cf3a8775c5@quicinc.com/ [2] https://lore.kernel.org/r/2f7e3770-ab47-42b5-719c-f7c661c07d28@socionext.com Link: https://lore.kernel.org/r/6211be8a-5d10-8f3a-6d33-af695dc35caf@gmail.com Reported-by: Qian Cai <quic_qiancai@quicinc.com> Tested-by: Qian Cai <quic_qiancai@quicinc.com> Reported-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com> Tested-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com> ] Link: https://lore.kernel.org/r/049fa71c-c7af-9c69-51c0-05c1bc2bf660@gmail.com Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Jakub Kicinski <kuba@kernel.org>
2021-10-11PCI/VPD: Add pci_read/write_vpd_any()Heiner Kallweit
In certain cases we need a variant of pci_read_vpd()/pci_write_vpd() that does not check against dev->vpd.len. Such cases are: - Reading VPD if dev->vpd.len isn't set yet (in pci_vpd_size()) - Devices that map non-VPD information to arbitrary places in VPD address space (example: Chelsio T3 EEPROM write-protect flag) Therefore add pci_read_vpd_any() and pci_write_vpd_any() that check against PCI_VPD_MAX_SIZE only. Link: https://lore.kernel.org/r/93ecce28-a158-f02a-d134-8afcaced8efe@gmail.com Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Jakub Kicinski <kuba@kernel.org>
2021-09-15PCI/VPD: Defer VPD sizing until first accessBjorn Helgaas
7bac54497c3e ("PCI/VPD: Determine VPD size in pci_vpd_init()") reads VPD at enumeration-time to find the size. But this is quite slow, and we don't need the size until we actually need data from VPD. Dave reported a boot slowdown of more than two minutes [1]. Defer the VPD sizing until a driver or the user (via sysfs) requests information from VPD. If devices are quirked because VPD is known not to work, don't bother even looking for the VPD capability. The VPD will not be accessible at all. [1] https://lore.kernel.org/r/20210913141818.GA27911@codemonkey.org.uk/ Link: https://lore.kernel.org/r/20210914215543.GA1437800@bjorn-Precision-5520 Fixes: 7bac54497c3e ("PCI/VPD: Determine VPD size in pci_vpd_init()") Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2021-08-31PCI/VPD: Use unaligned access helpersHeiner Kallweit
Use unaligned access helpers to simplify the code. Link: https://lore.kernel.org/r/0f1c7e21-5330-72ab-139d-f5ce3c65f04a@gmail.com Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2021-08-31PCI/VPD: Clean up public VPD defines and inline functionsHeiner Kallweit
After recent introduction of new VPD API functions and user migration these defines and inline functions aren't used outside VPD core any longer. Link: https://lore.kernel.org/r/d33e06bf-bc5e-ece7-bf35-7245ae224d1b@gmail.com Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2021-08-31PCI/VPD: Add pci_vpd_find_id_string()Heiner Kallweit
Add a pci_vpd_find_id_string() API function to retrieve the ID string from VPD. This way callers don't need pci_vpd_lrdt_size() any longer, and it can be made private to the VPD core. Link: https://lore.kernel.org/r/c5225bf6-8d29-970d-e271-0d7b52252630@gmail.com Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2021-08-31PCI/VPD: Include post-processing in pci_vpd_find_tag()Heiner Kallweit
Move pci_vpd_find_tag() post-processing from pci_vpd_find_ro_info_keyword() to pci_vpd_find_tag(). This simplifies function pci_vpd_find_id_string() that will be added in a subsequent patch. Link: https://lore.kernel.org/r/fb15393f-d3b2-e140-2643-570d3abd7382@gmail.com Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2021-08-31PCI/VPD: Stop exporting pci_vpd_find_info_keyword()Heiner Kallweit
Now that the last users have been migrated to pci_vpd_find_ro_keyword() we can stop exporting this function. It's still used in VPD core code. Link: https://lore.kernel.org/r/96ca2a56-383e-9b61-9cba-4f1e5611dc15@gmail.com Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2021-08-31PCI/VPD: Stop exporting pci_vpd_find_tag()Heiner Kallweit
Now that the last users have been migrated to pci_vpd_find_ro_keyword() we can stop exporting this function. It's still used in VPD core code. Link: https://lore.kernel.org/r/71131eca-0502-7878-365f-30b6614161cf@gmail.com Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2021-08-20PCI/VPD: Add pci_vpd_check_csum()Heiner Kallweit
VPD checksum information and checksum calculation are specified by PCIe r5.0, sec 6.28.2.2. Therefore checksum handling can and should be moved into the PCI VPD core. Add pci_vpd_check_csum() to validate the VPD checksum. [bhelgaas: split to separate patch] Link: https://lore.kernel.org/r/1643bd7a-088e-1028-c9b0-9d112cf48d63@gmail.com Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2021-08-20PCI/VPD: Add pci_vpd_find_ro_info_keyword()Heiner Kallweit
All users of pci_vpd_find_info_keyword() are interested in the VPD RO section only. In addition all calls are followed by the same activities to calculate start of tag data area and size of the data area. Add pci_vpd_find_ro_info_keyword() that combines these functionalities. pci_vpd_find_info_keyword() can be phased out once all users are converted. [bhelgaas: split pci_vpd_check_csum() to separate patch] Link: https://lore.kernel.org/r/1643bd7a-088e-1028-c9b0-9d112cf48d63@gmail.com Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2021-08-20PCI/VPD: Add pci_vpd_alloc()Heiner Kallweit
Several users of the VPD API use a fixed-size buffer and read the VPD into it for further usage. This requires special handling for the case that the buffer isn't big enough to hold the full VPD data. Also the buffer is often allocated on the stack, which isn't too nice. Add pci_vpd_alloc() to dynamically allocate buffer of the correct size and read VPD into it. Link: https://lore.kernel.org/r/955ff598-0021-8446-f856-0c2c077635d7@gmail.com Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2021-08-12PCI/VPD: Treat invalid VPD like missing VPD capabilityHeiner Kallweit
Exporting sysfs files that can't be accessed doesn't make much sense. Therefore, if either a quirk or the dynamic size calculation result in VPD being marked as invalid, treat this as though the device has no VPD capability. One consequence is that the "vpd" sysfs file is not visible. Link: https://lore.kernel.org/r/6a02b204-4ed2-4553-c3b2-eacf9554fa8d@gmail.com Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2021-08-12PCI/VPD: Determine VPD size in pci_vpd_init()Heiner Kallweit
Determine VPD size in pci_vpd_init(). Quirks set dev->vpd.len to a non-zero value, so they cause us to skip the dynamic size calculation. Prerequisite is that we move the quirks from FINAL to HEADER so they are run before pci_vpd_init(). Link: https://lore.kernel.org/r/cc4a6538-557a-294d-4f94-e6d1d3c91589@gmail.com Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2021-08-12PCI/VPD: Embed struct pci_vpd in struct pci_devHeiner Kallweit
Now that struct pci_vpd is really small, simplify the code by embedding struct pci_vpd directly in struct pci_dev instead of dynamically allocating it. Link: https://lore.kernel.org/r/d898489e-22ba-71f1-2f31-f1a78dc15849@gmail.com Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2021-08-12PCI/VPD: Remove struct pci_vpd.valid memberHeiner Kallweit
Instead of having a separate flag, use vp->len != 0 as indicator that VPD validity has been checked. Now vpd->len == PCI_VPD_SZ_INVALID indicates that VPD is invalid. Link: https://lore.kernel.org/r/9f777bc7-5316-e1b8-e5d4-f9f609bdb5dd@gmail.com Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2021-08-12PCI/VPD: Remove struct pci_vpd_opsHeiner Kallweit
Some multi-function devices share VPD hardware across functions and don't work correctly for concurrent VPD accesses to different functions. Struct pci_vpd_ops was added by 932c435caba8 ("PCI: Add dev_flags bit to access VPD through function 0") so that on these devices, VPD accesses to any function would always go to function 0. It's easier to just check for the PCI_DEV_FLAGS_VPD_REF_F0 quirk bit in the two places we need it than to deal with the struct pci_vpd_ops. Simplify the code by removing struct pci_vpd_ops and removing the indirect calls. [bhelgaas: check for !func0_dev earlier, commit log] Link: https://lore.kernel.org/r/b2532a41-df8b-860f-461f-d5c066c819d0@gmail.com Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2021-08-12PCI/VPD: Reorder pci_read_vpd(), pci_write_vpd()Heiner Kallweit
Reorder pci_read_vpd() and pci_write_vpd() to prepare for future patches. No functional change intended. Link: https://lore.kernel.org/r/89f0f5a2-293b-a017-fc67-a36473a792bf@gmail.com Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2021-08-09PCI/VPD: Remove struct pci_vpd.flagHeiner Kallweit
The struct pci_vpd.flag member was used only to communicate between pci_vpd_wait() and its callers. Remove the flag member and pass the value directly to pci_vpd_wait() to simplify the code. [bhelgaas: commit log] Link: https://lore.kernel.org/r/e4ef6845-6b23-1646-28a0-d5c5a28347b6@gmail.com Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2021-08-09PCI/VPD: Make pci_vpd_wait() uninterruptibleHeiner Kallweit
Reading/writing 4 bytes should be fast enough even on a slow bus, therefore pci_vpd_wait() doesn't have to be interruptible. Making it uninterruptible allows to simplify the code. In addition make VPD writes uninterruptible in general. It's about vital data, and allowing writes to be interruptible may leave the VPD in an inconsistent state. Link: https://lore.kernel.org/r/258bf994-bc2a-2907-9181-2c7a562986d5@gmail.com Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2021-08-09PCI/VPD: Remove pci_vpd_size() old_size argumentHeiner Kallweit
vpd->len is initialized to PCI_VPD_MAX_SIZE, and if a quirk is used to set a specific VPD size, then pci_vpd_set_size() sets vpd->valid, resulting in pci_vpd_size() not being called. Therefore we can remove the old_size argument. Note that we don't have to check off < PCI_VPD_MAX_SIZE because that's implicitly done by pci_read_vpd(). Link: https://lore.kernel.org/r/ede36c16-5335-6867-43a1-293641348430@gmail.com Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2021-08-09PCI/VPD: Allow access to valid parts of VPD if some is invalidBjorn Helgaas
Previously, if we found any error in the VPD, we returned size 0, which prevents access to all of VPD. But there may be valid resources in VPD before the error, and there's no reason to prevent access to those. "off" covers only VPD resources known to have valid header tags. In case of error, return "off" (which may be zero if we haven't found any valid header tags at all). Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Hannes Reinecke <hare@suse.de>
2021-08-09PCI/VPD: Don't check Large Resource Item Names for validityBjorn Helgaas
VPD consists of a series of Small and Large Resources. Computing the size of VPD requires only the length of each, which is specified in the generic tag of each resource. We only expect to see ID_STRING, RO_DATA, and RW_DATA in VPD, but it's not a problem if it contains other resource types because all we care about is the size. Drop the validity checking of Large Resource items. Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Hannes Reinecke <hare@suse.de>
2021-08-09PCI/VPD: Reject resource tags with invalid sizeBjorn Helgaas
VPD is limited in size by the 15-bit VPD Address field in the VPD Capability. Each resource tag includes a length that determines the overall size of the resource. Reject any resources that would extend past the maximum VPD size. Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Hannes Reinecke <hare@suse.de>
2021-07-30PCI/VPD: Treat initial 0xff as missing EEPROMHeiner Kallweit
Previously we assumed that the first tag being 0x00 meant an EEPROM was missing. The first tag being 0xff means the same thing; check for that also. [bhelgaas: rework error mesage] Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Hannes Reinecke <hare@suse.de>
2021-07-30PCI/VPD: Check Resource Item Names against those valid for typeBjorn Helgaas
Previously, we checked for PCI_VPD_STIN_END, PCI_VPD_LTIN_ID_STRING, etc., outside the Large and Small Resource cases, so we checked Large Resource Item Names against a Small Resource name and vice versa. Move these tests into the Large and Small Resource cases, so we only check PCI_VPD_STIN_END for Small Resources and PCI_VPD_LTIN_* for Large Resources. Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Hannes Reinecke <hare@suse.de>
2021-07-30PCI/VPD: Correct diagnostic for VPD read failureBjorn Helgaas
Previously, when a VPD read failed, we warned about an "invalid large VPD tag". Warn about the VPD read failure instead. Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Hannes Reinecke <hare@suse.de>
2021-05-04Merge branch 'pci/sysfs'Bjorn Helgaas
- Convert sysfs "config", "rom", "reset", "label", "index", "acpi_index" to static attributes to fix races in device enumeration (Krzysztof Wilczyński) - Convert sysfs "vpd" to static attribute (Heiner Kallweit, Krzysztof Wilczyński) - Use sysfs_emit() in "show" functions (Krzysztof Wilczyński) * pci/sysfs: PCI/sysfs: Use sysfs_emit() and sysfs_emit_at() in "show" functions PCI/sysfs: Rearrange smbios_attr_group and acpi_attr_group PCI/sysfs: Tidy SMBIOS & ACPI label attributes PCI/sysfs: Convert "index", "acpi_index", "label" to static attributes PCI/sysfs: Define SMBIOS label attributes with DEVICE_ATTR*() PCI/sysfs: Define ACPI label attributes with DEVICE_ATTR*() PCI/sysfs: Rename device_has_dsm() to device_has_acpi_name() PCI/sysfs: Convert "vpd" to static attribute PCI/sysfs: Rename "vpd" attribute accessors PCI/sysfs: Convert "reset" to static attribute PCI/sysfs: Convert "rom" to static attribute PCI/sysfs: Convert "config" to static attribute
2021-04-30PCI: Allow VPD access for QLogic ISP2722Arun Easi
0d5370d1d852 ("PCI: Prevent VPD access for QLogic ISP2722") disabled access to VPD of the ISP2722-based 16/32Gb Fibre Channel to PCIe Adapter because reading past the end of the VPD caused NMIs. 104daa71b396 ("PCI: Determine actual VPD size on first access") limits reads to the actual size of VPD, which should prevent these NMIs. 104daa71b396 was merged *before* 0d5370d1d852, but we think the testing that prompted 0d5370d1d852 ("PCI: Prevent VPD access for QLogic ISP2722") was done with a kernel that lacked 104daa71b396. See [1, 2]. Remove the quirk added by 0d5370d1d852 ("PCI: Prevent VPD access for QLogic ISP2722") so customers can read the HBA VPD. [1] https://lore.kernel.org/linux-pci/alpine.LRH.2.21.9999.2012161641230.28924@irv1user01.caveonetworks.com/ [2] https://lore.kernel.org/linux-pci/alpine.LRH.2.21.9999.2104071535110.13940@irv1user01.caveonetworks.com/ [bhelgaas: commit log] Link: https://lore.kernel.org/r/20210409215153.16569-2-aeasi@marvell.com Signed-off-by: Arun Easi <aeasi@marvell.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Cc: stable@vger.kernel.org # v4.6+
2021-04-30PCI/VPD: Add helper pci_get_func0_dev()Heiner Kallweit
Factor out the "get function 0" logic into pci_get_func0_dev(). [bhelgaas: keep PCI_DEVFN(PCI_SLOT()) instead of exposing implementation details, commit log] Link: https://lore.kernel.org/r/75d1f619-8a35-690d-8fc8-e851264a4bbb@gmail.com Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2021-04-30PCI/VPD: Remove pci_vpd_find_tag() SRDT handlingHeiner Kallweit
Only SRDT tag is the end tag, and no caller is interested in it. This allows to remove all SRDT tag handling. Link: https://lore.kernel.org/r/3f63f06f-734f-8fff-9518-27fe1faf903d@gmail.com Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2021-04-30PCI/VPD: Remove pci_vpd_find_tag() 'offset' argumentHeiner Kallweit
All callers pass 0 as offset. Therefore remove the parameter and use a fixed offset 0 in pci_vpd_find_tag(). Link: https://lore.kernel.org/r/f62e6e19-5423-2ead-b2bd-62844b23ef8f@gmail.com Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2021-04-30PCI/VPD: Change pci_vpd_init() return type to voidHeiner Kallweit
pci_init_capabilities() is the only caller and doesn't use the return value. So let's change the return type to void. Link: https://lore.kernel.org/r/663ec440-8375-1459-ddb4-98ea76e75917@gmail.com Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2021-04-30PCI/VPD: Make missing VPD message less alarmingHeiner Kallweit
Realtek RTL8169/8168/8125 NIC families indicate VPD capability and an optional VPD EEPROM can be connected via I2C/SPI. However I haven't seen any card or system with such a VPD EEPROM yet. The missing EEPROM causes the following warning whenever e.g. lscpi -vv is executed. invalid short VPD tag 00 at offset 01 The warning confuses users, and I think we should handle the situation more gently. Therefore, if first VPD byte is read as 0x00, assume a missing optional VPD PROM and replace the warning with a more descriptive message at info level. [bhelgaas: fix pre-existing whitespace] Link: https://lore.kernel.org/r/ccbc11f1-4dbb-e2c8-d0ea-559e06d4c340@gmail.com Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2021-04-30PCI/VPD: Remove pci_set_vpd_size()Heiner Kallweit
24a1720a0841 ("cxgb4: collect serial config version from register") removed the only usage of pci_set_vpd_size(). If a device needs to override the auto-detected VPD size, then this can be done with a PCI quirk, as is done for Chelsio devices. There's no need to allow drivers to change the VPD size. Remove pci_set_vpd_size(). [bhelgaas: squash in Arnd's fix for "'pci_vpd_set_size' defined but not used" from https://lore.kernel.org/r/20210421140334.3847155-1-arnd@kernel.org] Link: https://lore.kernel.org/r/47d86e52-9bcf-7da7-1edb-0d988a7a82ab@gmail.com Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Krzysztof Wilczyński <kw@linux.com>
2021-04-29PCI/sysfs: Convert "vpd" to static attributeKrzysztof Wilczyński
The "vpd" sysfs attribute allows access to Vital Product Data (VPD). Previously it was dynamically created either by pci_bus_add_device() or the pci_sysfs_init() initcall, but since it doesn't need to be created or removed dynamically, we can use a static attribute so the device model takes care of addition and removal automatically. Convert "vpd" to a static attribute and use the .is_bin_visible() callback to check whether the device supports VPD. Remove pcie_vpd_create_sysfs_dev_files(), pcie_vpd_remove_sysfs_dev_files(), pci_create_capabilities_sysfs(), and pci_create_capabilities_sysfs(), which are no longer needed. [bhelgaas: This is substantially the same as the earlier patch from Heiner Kallweit <hkallweit1@gmail.com>. I included Krzysztof's change here so all the "convert to static attribute" changes are together.] [bhelgaas: rename to vpd_read()/vpd_write() and pci_dev_vpd_attr_group] Suggested-by: Oliver O'Halloran <oohall@gmail.com> Based-on: https://lore.kernel.org/r/7703024f-8882-9eec-a122-599871728a89@gmail.com Based-on-patch-by: Heiner Kallweit <hkallweit1@gmail.com> Link: https://lore.kernel.org/r/20210416205856.3234481-5-kw@linux.com Signed-off-by: Krzysztof Wilczyński <kw@linux.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2021-04-29PCI/sysfs: Rename "vpd" attribute accessorsBjorn Helgaas
Rename "vpd" attribute accessors so they fit with the BIN_ATTR_RW() macro usage. Currently there is no BIN_ATTR_ADMIN_RW() that uses 0600 permissions, but if there were, it would likely use "vpd_read()" and "vpd_write()". No functional change intended. Extracted from the patch mentioned below by Heiner Kallweit <hkallweit1@gmail.com>. Link: https://lore.kernel.org/linux-pci/7703024f-8882-9eec-a122-599871728a89@gmail.com/ Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2021-03-30PCI/VPD: Remove sysfs accessor size checking dead codeHeiner Kallweit
Since 104daa71b396 ("PCI: Determine actual VPD size on first access") attribute size is set to 0 (unlimited). Remove the dead code that checks for "bin_attr->size > 0". Link: https://lore.kernel.org/r/267eae86-f8a6-6792-a7f8-2c4fd51beedc@gmail.com Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Krzysztof Wilczyński <kw@linux.com>
2021-03-30PCI/VPD: Remove obsolete Broadcom NIC quirkHeiner Kallweit
quirk_brcm_570x_limit_vpd() was added in 2008 [0] when we didn't have the logic to determine VPD size based on checking for the VPD end tag. Now that we do have this logic [1] and don't read beyond the end tag, this quirk can be removed. [0] 99cb233d60cb ("PCI: Limit VPD read/write lengths for Broadcom 5706, 5708, 5709 rev.") [1] 104daa71b396 ("PCI: Determine actual VPD size on first access") Link: https://lore.kernel.org/r/daa6acdf-5027-62c8-e3fb-125411b018f5@gmail.com Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2019-09-16PCI/VPD: Prevent VPD access for Amazon's Annapurna Labs Root PortJonathan Chocron
The Amazon Annapurna Labs PCIe Root Port exposes the VPD capability, but there is no actual support for it. Trying to access the VPD (for example, as part of lspci -vv or when reading the vpd sysfs file), results in the following warning print: pcieport 0001:00:00.0: VPD access failed. This is likely a firmware bug on this device. Contact the card vendor for a firmware update Signed-off-by: Jonathan Chocron <jonnyc@amazon.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Reviewed-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com> Reviewed-by: Andrew Murray <andrew.murray@arm.com> Acked-by: Bjorn Helgaas <bhelgaas@google.com>
2018-08-14PCI/VPD: Check for VPD access completion before checking for timeoutBert Kenward
Previously we checked the timeout before checking the VPD access completion bit. On a very heavily loaded system this can cause VPD access to timeout. Check the completion bit before checking the timeout. Signed-off-by: Bert Kenward <bkenward@solarflare.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2018-04-06Merge tag 'pci-v4.17-changes' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci Pull PCI updates from Bjorn Helgaas: - move pci_uevent_ers() out of pci.h (Michael Ellerman) - skip ASPM common clock warning if BIOS already configured it (Sinan Kaya) - fix ASPM Coverity warning about threshold_ns (Gustavo A. R. Silva) - remove last user of pci_get_bus_and_slot() and the function itself (Sinan Kaya) - add decoding for 16 GT/s link speed (Jay Fang) - add interfaces to get max link speed and width (Tal Gilboa) - add pcie_bandwidth_capable() to compute max supported link bandwidth (Tal Gilboa) - add pcie_bandwidth_available() to compute bandwidth available to device (Tal Gilboa) - add pcie_print_link_status() to log link speed and whether it's limited (Tal Gilboa) - use PCI core interfaces to report when device performance may be limited by its slot instead of doing it in each driver (Tal Gilboa) - fix possible cpqphp NULL pointer dereference (Shawn Lin) - rescan more of the hierarchy on ACPI hotplug to fix Thunderbolt/xHCI hotplug (Mika Westerberg) - add support for PCI I/O port space that's neither directly accessible via CPU in/out instructions nor directly mapped into CPU physical memory space. This is fairly intrusive and includes minor changes to interfaces used for I/O space on most platforms (Zhichang Yuan, John Garry) - add support for HiSilicon Hip06/Hip07 LPC I/O space (Zhichang Yuan, John Garry) - use PCI_EXP_DEVCTL2_COMP_TIMEOUT in rapidio/tsi721 (Bjorn Helgaas) - remove possible NULL pointer dereference in of_pci_bus_find_domain_nr() (Shawn Lin) - report quirk timings with dev_info (Bjorn Helgaas) - report quirks that take longer than 10ms (Bjorn Helgaas) - add and use Altera Vendor ID (Johannes Thumshirn) - tidy Makefiles and comments (Bjorn Helgaas) - don't set up INTx if MSI or MSI-X is enabled to align cris, frv, ia64, and mn10300 with x86 (Bjorn Helgaas) - move pcieport_if.h to drivers/pci/pcie/ to encapsulate it (Frederick Lawler) - merge pcieport_if.h into portdrv.h (Bjorn Helgaas) - move workaround for BIOS PME issue from portdrv to PCI core (Bjorn Helgaas) - completely disable portdrv with "pcie_ports=compat" (Bjorn Helgaas) - remove portdrv link order dependency (Bjorn Helgaas) - remove support for unused VC portdrv service (Bjorn Helgaas) - simplify portdrv feature permission checking (Bjorn Helgaas) - remove "pcie_hp=nomsi" parameter (use "pci=nomsi" instead) (Bjorn Helgaas) - remove unnecessary "pcie_ports=auto" parameter (Bjorn Helgaas) - use cached AER capability offset (Frederick Lawler) - don't enable DPC if BIOS hasn't granted AER control (Mika Westerberg) - rename pcie-dpc.c to dpc.c (Bjorn Helgaas) - use generic pci_mmap_resource_range() instead of powerpc and xtensa arch-specific versions (David Woodhouse) - support arbitrary PCI host bridge offsets on sparc (Yinghai Lu) - remove System and Video ROM reservations on sparc (Bjorn Helgaas) - probe for device reset support during enumeration instead of runtime (Bjorn Helgaas) - add ACS quirk for Ampere (née APM) root ports (Feng Kan) - add function 1 DMA alias quirk for Marvell 88SE9220 (Thomas Vincent-Cross) - protect device restore with device lock (Sinan Kaya) - handle failure of FLR gracefully (Sinan Kaya) - handle CRS (config retry status) after device resets (Sinan Kaya) - skip various config reads for SR-IOV VFs as an optimization (KarimAllah Ahmed) - consolidate VPD code in vpd.c (Bjorn Helgaas) - add Tegra dependency on PCI_MSI_IRQ_DOMAIN (Arnd Bergmann) - add DT support for R-Car r8a7743 (Biju Das) - fix a PCI_EJECT vs PCI_BUS_RELATIONS race condition in Hyper-V host bridge driver that causes a general protection fault (Dexuan Cui) - fix Hyper-V host bridge hang in MSI setup on 1-vCPU VMs with SR-IOV (Dexuan Cui) - fix Hyper-V host bridge hang when ejecting a VF before setting up MSI (Dexuan Cui) - make several structures static (Fengguang Wu) - increase number of MSI IRQs supported by Synopsys DesignWare bridges from 32 to 256 (Gustavo Pimentel) - implemented multiplexed IRQ domain API and remove obsolete MSI IRQ API from DesignWare drivers (Gustavo Pimentel) - add Tegra power management support (Manikanta Maddireddy) - add Tegra loadable module support (Manikanta Maddireddy) - handle 64-bit BARs correctly in endpoint support (Niklas Cassel) - support optional regulator for HiSilicon STB (Shawn Guo) - use regulator bulk API for Qualcomm apq8064 (Srinivas Kandagatla) - support power supplies for Qualcomm msm8996 (Srinivas Kandagatla) * tag 'pci-v4.17-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (123 commits) MAINTAINERS: Add John Garry as maintainer for HiSilicon LPC driver HISI LPC: Add ACPI support ACPI / scan: Do not enumerate Indirect IO host children ACPI / scan: Rename acpi_is_serial_bus_slave() for more general use HISI LPC: Support the LPC host on Hip06/Hip07 with DT bindings of: Add missing I/O range exception for indirect-IO devices PCI: Apply the new generic I/O management on PCI IO hosts PCI: Add fwnode handler as input param of pci_register_io_range() PCI: Remove __weak tag from pci_register_io_range() MAINTAINERS: Add missing /drivers/pci/cadence directory entry fm10k: Report PCIe link properties with pcie_print_link_status() net/mlx5e: Use pcie_bandwidth_available() to compute bandwidth net/mlx5: Report PCIe link properties with pcie_print_link_status() net/mlx4_core: Report PCIe link properties with pcie_print_link_status() PCI: Add pcie_print_link_status() to log link speed and whether it's limited PCI: Add pcie_bandwidth_available() to compute bandwidth available to device misc: pci_endpoint_test: Handle 64-bit BARs properly PCI: designware-ep: Make dw_pcie_ep_reset_bar() handle 64-bit BARs properly PCI: endpoint: Make sure that BAR_5 does not have 64-bit flag set when clearing PCI: endpoint: Make epc->ops->clear_bar()/pci_epc_clear_bar() take struct *epf_bar ...
2018-04-04Merge branch 'pci/vpd'Bjorn Helgaas
- consolidate VPD code in vpd.c (Bjorn Helgaas) * pci/vpd: PCI/VPD: Move VPD structures to vpd.c PCI/VPD: Move VPD quirks to vpd.c PCI/VPD: Move VPD sysfs code to vpd.c PCI/VPD: Move VPD access code to vpd.c
2018-03-19PCI: Tidy commentsBjorn Helgaas
Remove pointless comments that tell us the file name, remove blank line comments, follow multi-line comment conventions. No functional change intended. Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2018-03-19PCI/VPD: Move VPD structures to vpd.cBjorn Helgaas
The VPD-related structures are only used in vpd.c, so move them from drivers/pci/pci.h to vpd.c. No functional change intended. Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2018-03-19PCI/VPD: Move VPD quirks to vpd.cBjorn Helgaas
Move the VPD-related quirks from quirks.c to vpd.c, which removes the need for struct pci_vpd outside vpd.c. The goal is to encapsulate all the VPD code and structures in vpd.c. No functional change intended. Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2018-03-19PCI/VPD: Move VPD sysfs code to vpd.cBjorn Helgaas
Move the VPD-related sysfs code from pci-sysfs.c to vpd.c. This follows the pattern of pcie_aspm_create_sysfs_dev_files(). The goal is to encapsulate all the VPD code and structures in vpd.c. No functional change intended. Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2018-03-19PCI/VPD: Move VPD access code to vpd.cBjorn Helgaas
Move the VPD-related code from access.c to vpd.c. The goal is to encapsulate all the VPD code and structures in vpd.c. No functional change intended. Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2018-01-26PCI: Add SPDX GPL-2.0 when no license was specifiedBjorn Helgaas
b24413180f56 ("License cleanup: add SPDX GPL-2.0 license identifier to files with no license") added SPDX GPL-2.0 to several PCI files that previously contained no license information. Add SPDX GPL-2.0 to all other PCI files that did not contain any license information and hence were under the default GPL version 2 license of the kernel. Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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