* pci/printk:
PCI: Replace dev_printk(KERN_DEBUG) with dev_info(), etc
PCI: Replace printk(KERN_INFO) with pr_info(), etc
PCI: Use dev_printk() when possible
- Mark ATS on AMD Stoney Radeon R7 GPU broken to avoid IOMMU issues
(Nikolai Kostrigin)
- Mark Atheros AR9462 to avoid bus reset that locks up host machine
(James Prestwood)
* pci/virtualization:
PCI: Mark Atheros AR9462 to avoid bus reset
PCI: Mark AMD Stoney Radeon R7 GPU ATS as broken
Replace dev_printk(KERN_DEBUG) with dev_info(), etc to be more consistent
with other logging and avoid checkpatch warnings.
The KERN_DEBUG messages could be converted to dev_dbg(), but that depends
on CONFIG_DYNAMIC_DEBUG and DEBUG, and we want most of these messages to
*always* be in the dmesg log.
Link: https://lore.kernel.org/lkml/1555733240-19875-1-git-send-email-mohankumar718@gmail.com
Signed-off-by: Mohan Kumar <mohankumar718@gmail.com>
[bhelgaas: commit log]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Use dev_printk() when possible. This makes messages more consistent with
other device-related messages and, in some cases, adds useful information.
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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Merge tag 'printk-for-5.2' of git://git.kernel.org/pub/scm/linux/kernel/git/pmladek/printk
Pull printk updates from Petr Mladek:
- Allow state reset of printk_once() calls.
- Prevent crashes when dereferencing invalid pointers in vsprintf().
Only the first byte is checked for simplicity.
- Make vsprintf warnings consistent and inlined.
- Treewide conversion of obsolete %pf, %pF to %ps, %pF printf
modifiers.
- Some clean up of vsprintf and test_printf code.
* tag 'printk-for-5.2' of git://git.kernel.org/pub/scm/linux/kernel/git/pmladek/printk:
lib/vsprintf: Make function pointer_string static
vsprintf: Limit the length of inlined error messages
vsprintf: Avoid confusion between invalid address and value
vsprintf: Prevent crash when dereferencing invalid pointers
vsprintf: Consolidate handling of unknown pointer specifiers
vsprintf: Factor out %pO handler as kobject_string()
vsprintf: Factor out %pV handler as va_format()
vsprintf: Factor out %p[iI] handler as ip_addr_string()
vsprintf: Do not check address of well-known strings
vsprintf: Consistent %pK handling for kptr_restrict == 0
vsprintf: Shuffle restricted_pointer()
printk: Tie printk_once / printk_deferred_once into .data.once for reset
treewide: Switch printk users from %pf and %pF to %ps and %pS, respectively
lib/test_printf: Switch to bitmap_zalloc()
On ThinkPad P50 SKUs with an Nvidia Quadro M1000M instead of the M2000M
variant, the BIOS does not always reset the secondary Nvidia GPU during
reboot if the laptop is configured in Hybrid Graphics mode. The reason is
unknown, but the following steps and possibly a good bit of patience will
reproduce the issue:
1. Boot up the laptop normally in Hybrid Graphics mode
2. Make sure nouveau is loaded and that the GPU is awake
3. Allow the Nvidia GPU to runtime suspend itself after being idle
4. Reboot the machine, the more sudden the better (e.g. sysrq-b may help)
5. If nouveau loads up properly, reboot the machine again and go back to
step 2 until you reproduce the issue
This results in some very strange behavior: the GPU will be left in exactly
the same state it was in when the previously booted kernel started the
reboot. This has all sorts of bad side effects: for starters, this
completely breaks nouveau starting with a mysterious EVO channel failure
that happens well before we've actually used the EVO channel for anything:
nouveau 0000:01:00.0: disp: chid 0 mthd 0000 data 00000400 00001000 00000002
This causes a timeout trying to bring up the GR ctx:
nouveau 0000:01:00.0: timeout
WARNING: CPU: 0 PID: 12 at drivers/gpu/drm/nouveau/nvkm/engine/gr/ctxgf100.c:1547 gf100_grctx_generate+0x7b2/0x850 [nouveau]
Hardware name: LENOVO 20EQS64N0B/20EQS64N0B, BIOS N1EET82W (1.55 ) 12/18/2018
Workqueue: events_long drm_dp_mst_link_probe_work [drm_kms_helper]
...
nouveau 0000:01:00.0: gr: wait for idle timeout (en: 1, ctxsw: 0, busy: 1)
nouveau 0000:01:00.0: gr: wait for idle timeout (en: 1, ctxsw: 0, busy: 1)
nouveau 0000:01:00.0: fifo: fault 01 [WRITE] at 0000000000008000 engine 00 [GR] client 15 [HUB/SCC_NB] reason c4 [] on channel -1 [0000000000 unknown]
The GPU never manages to recover. Booting without loading nouveau causes
issues as well, since the GPU starts sending spurious interrupts that cause
other device's IRQs to get disabled by the kernel:
irq 16: nobody cared (try booting with the "irqpoll" option)
...
handlers:
[<000000007faa9e99>] i801_isr [i2c_i801]
Disabling IRQ #16
...
serio: RMI4 PS/2 pass-through port at rmi4-00.fn03
i801_smbus 0000:00:1f.4: Timeout waiting for interrupt!
i801_smbus 0000:00:1f.4: Transaction timeout
rmi4_f03 rmi4-00.fn03: rmi_f03_pt_write: Failed to write to F03 TX register (-110).
i801_smbus 0000:00:1f.4: Timeout waiting for interrupt!
i801_smbus 0000:00:1f.4: Transaction timeout
rmi4_physical rmi4-00: rmi_driver_set_irq_bits: Failed to change enabled interrupts!
This causes the touchpad and sometimes other things to get disabled.
Since this happens without nouveau, we can't fix this problem from nouveau
itself.
Add a PCI quirk for the specific P50 variant of this GPU. Make sure the
GPU is advertising NoReset- so we don't reset the GPU when the machine is
in Dedicated graphics mode (where the GPU being initialized by the BIOS is
normal and expected). Map the GPU MMIO space and read the magic 0x2240c
register, which will have bit 1 set if the device was POSTed during a
previous boot. Once we've confirmed all of this, reset the GPU and
re-disable it - bringing it back to a healthy state.
Link: https://bugzilla.kernel.org/show_bug.cgi?id=203003
Link: https://lore.kernel.org/lkml/20190212220230.1568-1-lyude@redhat.com
Signed-off-by: Lyude Paul <lyude@redhat.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: nouveau@lists.freedesktop.org
Cc: dri-devel@lists.freedesktop.org
Cc: Karol Herbst <kherbst@redhat.com>
Cc: Ben Skeggs <skeggsb@gmail.com>
Cc: stable@vger.kernel.org
When using PCI passthrough with this device, the host machine locks up
completely when starting the VM, requiring a hard reboot. Add a quirk to
avoid bus resets on this device.
Fixes: c3e59ee4e7 ("PCI: Mark Atheros AR93xx to avoid bus reset")
Link: https://lore.kernel.org/linux-pci/20190107213248.3034-1-james.prestwood@linux.intel.com
Signed-off-by: James Prestwood <james.prestwood@linux.intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: stable@vger.kernel.org # v3.14+
ATS is broken on the Radeon R7 GPU (at least for Stoney Ridge based laptop)
and causes IOMMU stalls and system failure. Disable ATS on these devices
to make them usable again with IOMMU enabled.
Thanks to Joerg Roedel <jroedel@suse.de> for help.
[bhelgaas: In the email thread mentioned below, Alex suspects the real
problem is in sbios or iommu, so it may affect only certain systems, and it
may affect other devices in those systems as well. However, per Joerg we
lack the ability to debug further, so this quirk is the best we can do for
now.]
Link: https://bugzilla.kernel.org/show_bug.cgi?id=194521
Link: https://lore.kernel.org/lkml/20190408103725.30426-1-nickel@altlinux.org
Fixes: 9b44b0b09d ("PCI: Mark AMD Stoney GPU ATS as broken")
Signed-off-by: Nikolai Kostrigin <nickel@altlinux.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Joerg Roedel <jroedel@suse.de>
CC: stable@vger.kernel.org
Due to an erratum in some Pericom PCIe-to-PCI bridges in reverse mode
(conventional PCI on primary side, PCIe on downstream side), the Retrain
Link bit needs to be cleared manually to allow the link training to
complete successfully.
If it is not cleared manually, the link training is continuously restarted
and no devices below the PCI-to-PCIe bridge can be accessed. That means
drivers for devices below the bridge will be loaded but won't work and may
even crash because the driver is only reading 0xffff.
See the Pericom Errata Sheet PI7C9X111SLB_errata_rev1.2_102711.pdf for
details. Devices known as affected so far are: PI7C9X110, PI7C9X111SL,
PI7C9X130.
Add a new flag, clear_retrain_link, in struct pci_dev. Quirks for affected
devices set this bit.
Note that pcie_retrain_link() lives in aspm.c because that's currently the
only place we use it, but this erratum is not specific to ASPM, and we may
retrain links for other reasons in the future.
Signed-off-by: Stefan Mätje <stefan.maetje@esd.eu>
[bhelgaas: apply regardless of CONFIG_PCIEASPM]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
CC: stable@vger.kernel.org
There is a Marvell 88SE9170 PCIe SATA controller I found on a board here.
Some quick testing with the ARM SMMU enabled reveals that it suffers from
the same requester ID mixup problems as the other Marvell chips listed
already.
Add the PCI vendor/device ID to the list of chips which need the
workaround.
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: stable@vger.kernel.org
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Merge tag 'pci-v5.1-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci
Pull PCI updates from Bjorn Helgaas:
- Use match_string() instead of reimplementing it (Andy Shevchenko)
- Enable SERR# forwarding for all bridges (Bharat Kumar Gogada)
- Use Latency Tolerance Reporting if already enabled by platform (Bjorn
Helgaas)
- Save/restore LTR info for suspend/resume (Bjorn Helgaas)
- Fix DPC use of uninitialized data (Dongdong Liu)
- Probe bridge window attributes only once at enumeration-time to fix
device accesses during rescan (Bjorn Helgaas)
- Return BAR size (not "size -1 ") from pci_size() to simplify code (Du
Changbin)
- Use config header type (not class code) identify bridges more
reliably (Honghui Zhang)
- Work around Intel Denverton incorrect Trace Hub BAR size reporting
(Alexander Shishkin)
- Reorder pciehp cached state/hardware state updates to avoid missed
interrupts (Mika Westerberg)
- Turn ibmphp semaphores into completions or mutexes (Arnd Bergmann)
- Mark expected switch fall-through (Mathieu Malaterre)
- Use of_node_name_eq() for node name comparisons (Rob Herring)
- Add ACS and pciehp quirks for HXT SD4800 (Shunyong Yang)
- Consolidate Rohm Vendor ID definitions (Andy Shevchenko)
- Use u32 (not __u32) for things not exposed to userspace (Logan
Gunthorpe)
- Fix locking semantics of bus and slot reset interfaces (Alex
Williamson)
- Update PCIEPORTBUS Kconfig help text (Hou Zhiqiang)
- Allow portdrv to claim subtractive decode Ports so PCIe services will
work for them (Honghui Zhang)
- Report PCIe links that become degraded at run-time (Alexandru
Gagniuc)
- Blacklist Gigabyte X299 Root Port power management to fix Thunderbolt
hotplug (Mika Westerberg)
- Revert runtime PM suspend/resume callbacks that broke PME on network
cable plug (Mika Westerberg)
- Disable Data Link State Changed interrupts to prevent wakeup
immediately after suspend (Mika Westerberg)
- Extend altera to support Stratix 10 (Ley Foon Tan)
- Allow building altera driver on ARM64 (Ley Foon Tan)
- Replace Douglas with Tom Joseph as Cadence PCI host/endpoint
maintainer (Lorenzo Pieralisi)
- Add DT support for R-Car RZ/G2E (R8A774C0) (Fabrizio Castro)
- Add dra72x/dra74x/dra76x SoC compatible strings (Kishon Vijay Abraham I)
- Enable x2 mode support for dra72x/dra74x/dra76x SoC (Kishon Vijay
Abraham I)
- Configure dra7xx PHY to PCIe mode (Kishon Vijay Abraham I)
- Simplify dwc (remove unnecessary header includes, name variables
consistently, reduce inverted logic, etc) (Gustavo Pimentel)
- Add i.MX8MQ support (Andrey Smirnov)
- Add message to help debug dwc MSI-X mask bit errors (Gustavo
Pimentel)
- Work around imx7d PCIe PLL erratum (Trent Piepho)
- Don't assert qcom reset GPIO during probe (Bjorn Andersson)
- Skip dwc MSI init if MSIs have been disabled (Lucas Stach)
- Use memcpy_fromio()/memcpy_toio() instead of plain memcpy() in PCI
endpoint framework (Wen Yang)
- Add interface to discover supported endpoint features to replace a
bitfield that wasn't flexible enough (Kishon Vijay Abraham I)
- Implement the new supported-feature interface for designware-plat,
dra7xx, rockchip, cadence (Kishon Vijay Abraham I)
- Fix issues with 64-bit BAR in endpoints (Kishon Vijay Abraham I)
- Add layerscape endpoint mode support (Xiaowei Bao)
- Remove duplicate struct hv_vp_set in favor of struct hv_vpset (Maya
Nakamura)
- Rework hv_irq_unmask() to use cpumask_to_vpset() instead of
open-coded reimplementation (Maya Nakamura)
- Align Hyper-V struct retarget_msi_interrupt arguments (Maya Nakamura)
- Fix mediatek MMIO size computation to enable full size of available
MMIO space (Honghui Zhang)
- Fix mediatek DMA window size computation to allow endpoint DMA access
to full DRAM address range (Honghui Zhang)
- Fix mvebu prefetchable BAR regression caused by common bridge
emulation that assumed all bridges had prefetchable windows (Thomas
Petazzoni)
- Make advk_pci_bridge_emul_ops static (Wei Yongjun)
- Configure MPS settings for VMD root ports (Jon Derrick)
* tag 'pci-v5.1-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (92 commits)
PCI: Update PCIEPORTBUS Kconfig help text
PCI: Fix "try" semantics of bus and slot reset
PCI/LINK: Report degraded links via link bandwidth notification
dt-bindings: PCI: altera: Add altr,pcie-root-port-2.0
PCI: altera: Enable driver on ARM64
PCI: altera: Add Stratix 10 PCIe support
PCI/PME: Fix possible use-after-free on remove
PCI: aardvark: Make symbol 'advk_pci_bridge_emul_ops' static
PCI: dwc: skip MSI init if MSIs have been explicitly disabled
PCI: hv: Refactor hv_irq_unmask() to use cpumask_to_vpset()
PCI: hv: Replace hv_vp_set with hv_vpset
PCI: hv: Add __aligned(8) to struct retarget_msi_interrupt
PCI: mediatek: Enlarge PCIe2AHB window size to support 4GB DRAM
PCI: mediatek: Fix memory mapped IO range size computation
PCI: dwc: Remove superfluous shifting in definitions
PCI: dwc: Make use of GENMASK/FIELD_PREP
PCI: dwc: Make use of BIT() in constant definitions
PCI: dwc: Share code for dw_pcie_rd/wr_other_conf()
PCI: dwc: Make use of IS_ALIGNED()
PCI: imx6: Add code to request/control "pcie_aux" clock for i.MX8MQ
...
There are at least four different parts with the same Vendor and Device
ID ([16c3:abcd]):
1) Synopsys HAPS USB3 controller
2) Synopsys PCIe Root Port in Freescale/NXP i.MX6Q (reported by Lucas)
3) Synopsys PCIe Root Port in Freescale/NXP i.MX6QP (reported by Lukas)
4) Synopsys PCIe Root Port in Freescale/NXP i.MX7D (reported by Trent)
The HAPS USB3 controller has a Class Code of PCI_CLASS_SERIAL_USB_XHCI,
which means the XHCI driver would normally claim it. Previously,
quirk_synopsys_haps() changed the Class Code of all [16c3:abcd] devices,
including the Root Ports, to PCI_CLASS_SERIAL_USB_DEVICE to prevent the
XHCI driver from claiming them so dwc3-haps can claim them instead.
Changing the Class Code of the Root Ports prevents the PCI core from
handling them as bridges, so devices below them don't work.
Restrict the quirk so it only changes the Class Code for devices that start
with the PCI_CLASS_SERIAL_USB_XHCI Class Code, leaving the Root Ports
alone.
Fixes: 03e6742584 ("PCI: Override Synopsys USB 3.x HAPS device class")
Reported-by: Lukas F. Hartmann <lukas@mntmn.com>
Reported-by: Trent Piepho <tpiepho@impinj.com>
Reported-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Thinh Nguyen <thinhn@synopsys.com>
[bhelgaas: changelog]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
The design of HXT SD4800 ACS feature is the same as QCOM QDF2xxx. Add an
ACS quirk for the SD4800.
Signed-off-by: Shunyong Yang <shunyong.yang@hxt-semitech.com>
[bhelgaas: split to separate patch]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Sinan Kaya <okaya@kernel.org>
CC: Joey Zheng <yu.zheng@hxt-semitech.com>
There is a plan to build the kernel with -Wimplicit-fallthrough and
these places in the code produced warnings (W=1). Fix them up.
Signed-off-by: Mathieu Malaterre <malat@debian.org>
[bhelgaas: squash into one patch, drop extra changelog detail]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Synopsys USB 3.x host HAPS platform has a class code of
PCI_CLASS_SERIAL_USB_XHCI, and xhci driver can claim it. However, these
devices should use dwc3-haps driver. Change these devices' class code to
PCI_CLASS_SERIAL_USB_DEVICE to prevent the xhci-pci driver from claiming
them.
Signed-off-by: Thinh Nguyen <thinhn@synopsys.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Currently the Switchtec quirk runs on all endpoints in the switch,
including all the upstream and downstream ports. These other functions do
not contain BARs, so the quirk fails when trying to map the BAR and prints
the error "Cannot iomap Switchtec device". The user will see a few of
these useless and scary errors, one for each port in the switch.
At most, the quirk should only run on either a management endpoint
(PCI_CLASS_MEMORY_OTHER) or an NTB endpoint (PCI_CLASS_BRIDGE_OTHER).
However, the quirk is useless except in NTB applications, so we will
only run it when the class is PCI_CLASS_BRIDGE_OTHER.
Switch to using DECLARE_PCI_FIXUP_CLASS_FINAL and only match
PCI_CLASS_BRIDGE_OTHER.
Reported-by: Stephen Bates <sbates@raithlin.com>
Fixes: ad281ecf1c ("PCI: Add DMA alias quirk for Microsemi Switchtec NTB")
Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
[bhelgaas: split SWITCHTEC_QUIRK() introduction to separate patch]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: Doug Meyer <dmeyer@gigaio.com>
Cc: Kurt Schwemmer <kurt.schwemmer@microsemi.com>
Add SWITCHTEC_QUIRK() to reduce redundancy in declaring devices that use
quirk_switchtec_ntb_dma_alias().
By itself, this is no functional change, but a subsequent patch updates
SWITCHTEC_QUIRK() to fix ad281ecf1c ("PCI: Add DMA alias quirk for
Microsemi Switchtec NTB").
Fixes: ad281ecf1c ("PCI: Add DMA alias quirk for Microsemi Switchtec NTB")
Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
[bhelgaas: split to separate patch]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Add Device IDs to the Intel GPU "spurious interrupt" quirk table.
For these devices, unplugging the VGA cable and plugging it in again causes
spurious interrupts from the IGD. Linux eventually disables the interrupt,
but of course that disables any other devices sharing the interrupt.
The theory is that this is a VGA BIOS defect: it should have disabled the
IGD interrupt but failed to do so.
See f67fd55fa9 ("PCI: Add quirk for still enabled interrupts on Intel
Sandy Bridge GPUs") and 7c82126a94 ("PCI: Add new ID for Intel GPU
"spurious interrupt" quirk") for some history.
[bhelgaas: See link below for discussion about how to fix this more
generically instead of adding device IDs for every new Intel GPU. I hope
this is the last patch to add device IDs.]
Link: https://lore.kernel.org/linux-pci/1537974841-29928-1-git-send-email-bmeng.cn@gmail.com
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
[bhelgaas: changelog]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: stable@vger.kernel.org # v3.4+
Remove a set but unused variable in quirks.c. Fixes warning:
variable ‘mmio_sys_info’ set but not used [-Wunused-but-set-variable]
Signed-off-by: Joshua Abraham <j.abraham1776@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Allow the PCI quirk tables to be emitted in a way that avoids absolute
references to the hook functions. This reduces the size of the entries,
and, more importantly, makes them invariant under runtime relocation
(e.g., for KASLR)
Link: http://lkml.kernel.org/r/20180704083651.24360-6-ard.biesheuvel@linaro.org
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Michael Ellerman <mpe@ellerman.id.au>
Acked-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: James Morris <james.morris@microsoft.com>
Cc: James Morris <jmorris@namei.org>
Cc: Jessica Yu <jeyu@kernel.org>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Nicolas Pitre <nico@linaro.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Russell King <linux@armlinux.org.uk>
Cc: "Serge E. Hallyn" <serge@hallyn.com>
Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Thomas Garnier <thgarnie@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
- 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)
* remotes/lorenzo/pci/iproc:
PCI: iproc: Reduce inbound/outbound mapping print level
PCI: iproc: Reject unconfigured physical functions from PAXC
PCI: iproc: Disable MSI parsing in certain PAXC blocks
PCI: iproc: Fix up corrupted PAXC root complex config registers
PCI: iproc: Activate PAXC bridge quirk for more devices
- 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)
* pci/virtualization:
PCI: Add function 1 DMA alias quirk for Marvell 88SS9183
PCI: Delay after FLR of Intel DC P3700 NVMe
PCI: Disable Samsung SM961/PM961 NVMe before FLR
PCI: Export pcie_has_flr()
PCI: Rename pci_try_reset_bus() to pci_reset_bus()
PCI: Deprecate pci_reset_bus() and pci_reset_slot() functions
PCI: Unify try slot and bus reset API
PCI: Hide pci_reset_bridge_secondary_bus() from drivers
IB/hfi1: Use pci_try_reset_bus() for initiating PCI Secondary Bus Reset
PCI: Handle error return from pci_reset_bridge_secondary_bus()
PCI/IOV: Tidy pci_sriov_set_totalvfs()
PCI: Enable PASID only if entire path supports End-End TLP prefixes
# Conflicts:
# drivers/pci/hotplug/pciehp_hpc.c
- Add DMA alias quirk for Microsemi Switchtec NTB (Doug Meyer)
- Expand documentation for pci_add_dma_alias() (Logan Gunthorpe)
* pci/switchtec:
PCI: Expand documentation for pci_add_dma_alias()
PCI: Add DMA alias quirk for Microsemi Switchtec NTB
switchtec: Use generic PCI Vendor ID and Class Code
# Conflicts:
# drivers/pci/quirks.c
- 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)
* pci/peer-to-peer:
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
- 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)
* pci/misc:
PCI: Limit config space size for Netronome NFP5000
PCI/VPD: Check for VPD access completion before checking for timeout
PCI: Add PCI_DEVICE_DATA() macro to fully describe device ID entry
PCI: Unify PCI and normal DMA direction definitions
PCI: Use IRQF_ONESHOT if pci_request_irq() called with no handler
PCI: Call dma_debug_add_bus() for pci_bus_type from PCI core
PCI: Mark fall-through switch cases before enabling -Wimplicit-fallthrough
# Conflicts:
# drivers/pci/hotplug/pciehp_ctrl.c
Like the NFP4000 and NFP6000, the NFP5000 as an erratum where reading/
writing to PCI config space addresses above 0x600 can cause the NFP to
generate PCIe completion timeouts.
Limit the NFP5000's PF's config space size to 0x600 bytes as is already
done for the NFP4000 and NFP6000.
The NFP5000's VF is 0x6003 (PCI_DEVICE_ID_NETRONOME_NFP6000_VF), the same
device ID as the NFP6000's VF. Thus, its config space is already limited
by the existing use of quirk_nfp6000().
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Tony Egan <tony.egan@netronome.com>
Intel Sunrise Point PCH hardware has an implementation of the ACS bits that
does not comply with the PCIe standard. Add a device-specific quirk,
pci_quirk_disable_intel_spt_pch_acs_redir() to disable ACS Redirection on
this system.
Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
[bhelgaas: changelog, split to separate patch]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Alex Williamson <alex.williamson@redhat.com>
Intel Sunrise Point (SPT) PCH hardware has an implementation of the ACS
bits that does not comply with the PCIe standard. To deal with this we
need device-specific quirks to disable ACS redirection.
Add a new pci_dev_specific_disable_acs_redir() quirk and a new
.disable_acs_redir() function pointer for use by non-compliant devices. No
functional change intended.
Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
[bhelgaas: split to separate patch, move
pci_dev_specific_disable_acs_redir() declarations to drivers/pci/pci.h]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Alex Williamson <alex.williamson@redhat.com>
Convert the search for device-specific ACS enable quirks from searching a
NULL-terminated array to iterating through the array, which is always
fixed-size anyway. No functional change intended.
Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
[bhelgaas: changelog, split to separate patch for reviewability]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Alex Williamson <alex.williamson@redhat.com>
Add a device-specific reset for Intel DC P3700 NVMe device which exhibits a
timeout failure in drivers waiting for the ready status to update after
NVMe enable if the driver interacts with the device too soon after FLR. As
this has been observed in device assignment scenarios, resolve this with a
device-specific reset quirk to add an additional, heuristically determined,
delay after the FLR completes.
Link: https://bugzilla.redhat.com/show_bug.cgi?id=1592654
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
The Samsung SM961/PM961 (960 EVO) sometimes fails to return from FLR with
the PCI config space reading back as -1. A reproducible instance of this
behavior is resolved by clearing the enable bit in the NVMe configuration
register and waiting for the ready status to clear (disabling the NVMe
controller) prior to FLR.
Link: https://bugzilla.redhat.com/show_bug.cgi?id=1542494
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Activate PAXC bridge quirk for more PAXC based PCIe root complex with
the following PCIe device ID:
0xd750, 0xd802, 0xd804
Signed-off-by: Ray Jui <ray.jui@broadcom.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Oza Pawandeep <poza@codeaurora.org>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
In preparation to enabling -Wimplicit-fallthrough, mark switch cases where
we are expecting to fall through.
Warning level 2 was used: -Wimplicit-fallthrough=2
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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.
Workaround: Issue a CfgWr1 to the downstream device before issuing the
first CfgRd1 to the device. This allows the downstream device to capture
its bus number; ACS Source Validation no longer stops completions from
being forwarded by the downstream port. It has been observed that
Microsoft Windows implements this workaround already; however, some
versions of Linux and other operating systems may not.
When doing the first config read to probe for a device, if the device is
behind an IDT switch with this erratum:
1. Disable ACS Source Validation if enabled
2. Wait for device to become ready to accept config accesses (by using
the Config Request Retry Status mechanism)
3. Do a config write to the endpoint
4. Enable ACS Source Validation (if it was enabled to begin with)
The workaround suggested by IDT is basically only step 3, but we don't know
when the device is ready to accept config requests. That means we need to
do config reads until we receive a non-Config Request Retry Status, which
means we need to disable ACS SV temporarily.
Signed-off-by: James Puthukattukaran <james.puthukattukaran@oracle.com>
[bhelgaas: changelog, clean up whitespace, fold in unused variable fix
from Anders Roxell <anders.roxell@linaro.org>]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Alex Williamson <alex.williamson@redhat.com>
Add a quirk for the Microsemi Switchtec parts to allow DMA access via
non-transparent bridging to work when the IOMMU is turned on.
This exclusively addresses the ability of a remote NT endpoint to perform
DMA accesses through the locally enumerated NT endpoint. Other aspects of
the Switchtec NTB functionality, such as interrupts for doorbells and
messages are independent of this quirk, and will work whether the IOMMU is
on or off.
When a requestor on one NT endpoint accesses memory on another NT endpoint,
it does this via a devfn proxy ID. Proxy IDs are statically assigned to
each NT endpoint by the NTB hardware as part of the release-from-reset
sequence prior to PCI enumeration. These proxy IDs cannot be modified
dynamically, and are not visible to the host during enumeration.
When the Switchtec NTB driver loads it will map local requestor IDs, such
as the root complex and transparent bridge DMA engines, to proxy IDs by
populating those requestor IDs in hardware mapping table table entries.
This establishes a fixed relationship between a requestor ID and a proxy
ID.
When a peer on a remote NT endpoint performs an access within a particular
translation window in it's NT endpoint BAR address space, that access is
translated to a DMA request on the local endpoint's bus. As part of the
translation process, the original requestor ID has its devfn replaced with
the proxy ID, and the bus portion of the BDF is replaced with the bus of
the local NT endpoint. Thus, the DMA access from a remote NT endpoint will
appear on the local bus to have come from the unknown devfn which the IOMMU
will reject.
Interrogate NTB hardware registers for each remote NT endpoint to obtain
the proxy IDs that have been assigned to it and alias them to the local
(enumerated) NT endpoint's device. The IOMMU then accepts the remote proxy
IDs as if they were requests coming directly from the enumerated endpoint,
giving remote requestors access to memory resources which the local host
has made available.
Note that the aliasing of the proxy IDs cannot be performed at the driver
level given the current IOMMU architecture. Superficially this is because
pci_add_dma_alias() symbol is not exported. Functionally, the current
IOMMU design requires the aliasing to be performed prior to the creation of
IOMMU groups. If a driver were to attempt to use pci_add_dma_alias() in
its probe routine it would fail since the IOMMU groups have been set up by
that time. If the Switchtec hardware supported dynamic proxy ID
(re-)assignment this would be an issue, but it does not.
To further clarify static proxy ID assignment: While the requester ID to
proxy ID mapping can be dynamically changed, the number and value of proxy
IDs given to an NT EP cannot, even for dynamic reconfiguration such as
hot-add. Therefore, the chip configuration must account a priori for the
proxy IDs needs, considering both static and dynamic system configurations.
For example, a port on the chip may not having anything plugged into it at
start of day; but it must have a sufficient number of proxy IDs assigned to
accommodate the supported devices which may be hot-added.
Switchtec NTB functionality with the IOMMU off is unchanged by this quirk.
Signed-off-by: Doug Meyer <dmeyer@gigaio.com>
[bhelgaas: use hard-coded Device IDs instead of adding #defines for each]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
- add generic enable function for simple SR-IOV hardware (Alexander
Duyck)
- use generic SR-IOV enable for ena, nvme (Alexander Duyck)
- add ACS quirk for Intel 7th & 8th Gen mobile (Alex Williamson)
- add ACS quirk for Intel 300 series (Mika Westerberg)
* pci/virtualization:
PCI/IOV: Allow PF drivers to limit total_VFs to 0
PCI: Add "pci=noats" boot parameter
PCI: Add ACS quirk for Intel 300 series
PCI: Add ACS quirk for Intel 7th & 8th Gen mobile
nvme-pci: Use pci_sriov_configure_simple() to enable VFs
net: ena: Use pci_sriov_configure_simple() to enable VFs
PCI/IOV: Add pci-pf-stub driver for PFs that only enable VFs
PCI/IOV: Add pci_sriov_configure_simple()
The infrastructure that applies PCI quirks was buried in the middle of the
quirks themselves (at one time it was probably at the end of the file, but
new quirks tend to be added at the end of the file). Move it all to the
top of the file so it's easy to find. No functional change intended.
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Intel 300 series chipset still has the same ACS issue as the previous
generations so extend the ACS quirk to cover it as well.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: stable@vger.kernel.org
The specification update indicates these have the same errata for
implementing non-standard ACS capabilities.
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: stable@vger.kernel.org
Per PCIe r3.1, sec 2.2.6.2 and 7.8.4, a Requester may not use 8-bit Tags
unless its Extended Tag Field Enable is set, but all Receivers/Completers
must handle 8-bit Tags correctly regardless of their Extended Tag Field
Enable.
Some devices do not handle 8-bit Tags as Completers, so add a quirk for
them. If we find such a device, we disable Extended Tags for the entire
hierarchy to make peer-to-peer DMA possible.
The Broadcom HT1100/HT2000/HT2100 seems to have issues with handling 8-bit
tags. Mark it as broken.
This fixes Xorg hangs and unresponsive keyboards with errors like this:
radeon 0000:06:00.0: GPU lockup (current fence id 0x000000000000000e last fence id 0x0000000000000
[drm:r600_ring_test [radeon]] *ERROR* radeon: ring 0 test failed (scratch(0x8504)=0xCAFEDEAD)
[drm:r600_resume [radeon]] *ERROR* r600 startup failed on resume
Fixes: 60db3a4d8c ("PCI: Enable PCIe Extended Tags if supported")
Link: https://bugzilla.kernel.org/show_bug.cgi?id=196197
Signed-off-by: Sinan Kaya <okaya@codeaurora.org>
Signed-off-by: Bjorn Helgaas <helgaas@kernel.org>
CC: stable@vger.kernel.org # v4.11: 62ce94a7a5 PCI: Mark Broadcom HT2100 Root Port Extended Tags as broken
CC: stable@vger.kernel.org # v4.11
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Merge tag 'pci-v4.17-changes' of 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
...
Linus Torvalds