linux.git/Documentation/PCI, branch v4.19

Merge branch 'remotes/lorenzo/pci/dwc'

2018-08-15T19:59:11+00:00

  - Add Kirin MSI support (Xiaowei Song)

  - Drop unnecessary root_bus_nr setting from exynos, imx6, keystone,
    armada8k, artpec6, designware-plat, histb, qcom, spear13xx (Shawn Guo)

  - Move link notification settings from DesignWare core to individual
    drivers (Gustavo Pimentel)

  - Add endpoint library MSI-X interfaces (Gustavo Pimentel)

  - Correct signature of endpoint library IRQ interfaces (Gustavo Pimentel)

  - Add DesignWare endpoint library MSI-X callbacks (Gustavo Pimentel)

  - Add endpoint library MSI-X test support (Gustavo Pimentel)

* remotes/lorenzo/pci/dwc:
  PCI: endpoint: Add MSI set maximum restriction
  tools: PCI: Add MSI-X support
  pci_endpoint_test: Add 2 ioctl commands
  pci-epf-test/pci_endpoint_test: Add MSI-X support
  pci-epf-test/pci_endpoint_test: Use irq_type module parameter
  pci-epf-test/pci_endpoint_test: Cleanup PCI_ENDPOINT_TEST memspace
  PCI: dwc: Add legacy interrupt callback handler
  PCI: dwc: Rework MSI callbacks handler
  PCI: dwc: Add MSI-X callbacks handler
  PCI: Update xxx_pcie_ep_raise_irq() and pci_epc_raise_irq() signatures
  PCI: endpoint: Add MSI-X interfaces
  PCI: dwc: Fix EP link notification implementation
  PCI: spear13xx: Drop unnecessary root_bus_nr setting
  PCI: qcom: Drop unnecessary root_bus_nr setting
  PCI: histb: Drop unnecessary root_bus_nr setting
  PCI: designware-plat: Drop unnecessary root_bus_nr setting
  PCI: artpec6: Drop unnecessary root_bus_nr setting
  PCI: armada8k: Drop unnecessary root_bus_nr setting
  PCI: keystone: Drop unnecessary root_bus_nr setting
  PCI: imx6: Drop unnecessary root_bus_nr setting
  PCI: exynos: Drop unnecessary root_bus_nr setting
  PCI: kirin: Add MSI support

Merge branch 'pci/notes'

2018-08-15T19:58:57+00:00

  - Document ACPI description of PCI host bridges (Bjorn Helgaas)

* pci/notes:
  PCI: Document ACPI description of PCI host bridges

PCI: Document ACPI description of PCI host bridges

2018-07-27T20:38:43+00:00

Add a writeup about how PCI host bridges should be described in ACPI
using PNP0A03/PNP0A08 devices, PNP0C02 devices, and the MCFG table.

Signed-off-by: Bjorn Helgaas 
Reviewed-by: Sinan Kaya 
Reviewed-by: Rafael J. Wysocki

PCI/AER: Add sysfs attributes to provide AER stats and breakdown

2018-07-19T21:19:51+00:00

Add sysfs attributes to provide total and breakdown of the AERs seen,
into different type of correctable, fatal and nonfatal errors:

  /sys/bus/pci/devices//aer_dev_correctable
  /sys/bus/pci/devices//aer_dev_fatal
  /sys/bus/pci/devices//aer_dev_nonfatal

Signed-off-by: Rajat Jain 
Signed-off-by: Bjorn Helgaas

tools: PCI: Add MSI-X support

2018-07-19T10:47:13+00:00

Add MSI-X support to pcitest tool.

Modify pcitest.sh script to accommodate MSI-X interrupt tests.

Update documentation accordingly.

Signed-off-by: Gustavo Pimentel 
Signed-off-by: Lorenzo Pieralisi 
Acked-by: Kishon Vijay Abraham I

pci-epf-test/pci_endpoint_test: Add MSI-X support

2018-07-19T10:46:45+00:00

Add MSI-X support and update driver documentation accordingly.

Signed-off-by: Gustavo Pimentel 
Signed-off-by: Lorenzo Pieralisi 
Acked-by: Kishon Vijay Abraham I

pci-epf-test/pci_endpoint_test: Cleanup PCI_ENDPOINT_TEST memspace

2018-07-19T10:39:44+00:00

Cleanup PCI_ENDPOINT_TEST memspace (by moving the interrupt number away
from command section).

Add IRQ_TYPE register to identify the triggered ID interrupt required
for the READ/WRITE/COPY tests and raise IRQ test commands.

Update documentation accordingly.

Signed-off-by: Gustavo Pimentel 
Signed-off-by: Lorenzo Pieralisi 
Acked-by: Kishon Vijay Abraham I

PCI: endpoint: Add MSI-X interfaces

2018-07-19T10:34:23+00:00

Add PCI_EPC_IRQ_MSIX type.

Add MSI-X callbacks signatures to the ops structure.

Add sysfs interface for set/get MSI-X capability maximum number.

Update documentation accordingly.

Signed-off-by: Gustavo Pimentel 
Signed-off-by: Lorenzo Pieralisi 
Acked-by: Kishon Vijay Abraham I

PCI/AER: Handle ERR_FATAL with removal and re-enumeration of devices

2018-05-17T21:44:13+00:00

PCIe ERR_FATAL errors mean the Link is unreliable.  Components on the Link
may need to be reset to return to reliable operation (PCIe r4.0, sec
6.2.2).  We previously handled these errors much differently depending on
whether the platform supports Downstream Port Containment (DPC) (PCIe r4.0,
sec 6.2.10) or not.

The AER driver has historically logged the error details, called
driver-supplied pci_error_handlers callbacks, and reset the Link.  This
reset downstream devices, but did not remove them from the PCI subsystem,
re-enumerate them, or call their driver .remove() or .probe() methods.

DPC is different because the hardware automatically disables the Link when
it detects ERR_FATAL, which resets downstream devices.  There's no
opportunity for pci_error_handlers callbacks before resetting the Link.
The DPC driver removes affected devices (which calls their driver .remove()
methods), brings the Link back up, and re-enumerates (which calls driver
.probe() methods).

Align AER ERR_FATAL handling with DPC by resetting the Link in software,
skipping the driver pci_error_handlers callbacks, removing the devices from
the PCI subsystem, and re-enumerating.  The idea is that drivers and
devices should see the same behavior for ERR_FATAL events, regardless of
whether they're handled by AER or DPC.

Here are the basic ERR_FATAL recovery steps, showing the previous AER
behavior, the AER behavior after this patch, and the DPC behavior:

                          AER        AER      DPC
                          previous   new      behavior
                          --------   ---      --------
  Log error               yes        yes      yes (minimal)
  drv.error_detected()    yes        no       no
  Reset Link              yes        yes      yes
  drv.mmio_enabled()      yes        no       no
  drv.slot_reset()        yes        no       no
  drv.resume()            yes        no       no
  Remove PCI devices      no         yes      yes
    (calls drv.remove())
  Re-enumerate            no         yes      yes
    (calls drv.probe())

N.B. With DPC, the Link reset happens before the driver .remove() calls,
while with AER, the reset happens *after* the .remove() calls.  The goal is
to eventually do the reset before .remove() for AER as well.

Signed-off-by: Oza Pawandeep 
[bhelgaas: changelog, squash doc patch into this, remove unused
"result_data"]
Signed-off-by: Bjorn Helgaas 
Reviewed-by: Keith Busch

PCI: Update location of pci.ids file

2018-02-22T21:00:43+00:00

Update the URL for the pci.ids file and add locations for its mirrors.

Signed-off-by: Randy Dunlap 
Signed-off-by: Bjorn Helgaas 
Cc: Martin Mares 
Cc: Michal Vaner