kernel/linux.git/drivers/pci/access.c, branch linux-4.16.y

Merge branch 'pci/spdx' into next

2018-02-01T17:40:07+00:00

* pci/spdx: PCI: Add SPDX GPL-2.0+ to replace implicit GPL v2 or later statement PCI: Add SPDX GPL-2.0+ to replace GPL v2 or later boilerplate PCI: Add SPDX GPL-2.0 to replace COPYING boilerplate PCI: Add SPDX GPL-2.0 to replace GPL v2 boilerplate PCI: Add SPDX GPL-2.0 when no license was specified

PCI: Add SPDX GPL-2.0 when no license was specified

2018-01-26T17:45:16+00:00

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 Reviewed-by: Greg Kroah-Hartman

PCI: Add wrappers for dev_printk()

2018-01-18T18:55:24+00:00

Add PCI-specific dev_printk() wrappers and use them to simplify the code slightly. No functional change intended. Signed-off-by: Frederick Lawler [bhelgaas: squash into one patch] Signed-off-by: Bjorn Helgaas

PCI: Provide Kconfig option for lockless config space accessors

2017-06-28T20:32:56+00:00

The generic PCI configuration space accessors are globally serialized via pci_lock. On larger systems this causes massive lock contention when the configuration space has to be accessed frequently. One such access pattern is the Intel Uncore performance counter unit. Provide a kernel config option which can be selected by an architecture when the low level PCI configuration space accessors in the architecture use their own serialization or can operate completely lockless. Signed-off-by: Thomas Gleixner Acked-by: Bjorn Helgaas Cc: Andi Kleen Cc: Peter Zijlstra Cc: Stephane Eranian Cc: Borislav Petkov Cc: linux-pci@vger.kernel.org Link: http://lkml.kernel.org/r/20170316215057.205961140@linutronix.de Signed-off-by: Thomas Gleixner

PCI: Make error code types consistent in pci_{read,write}_config_*

2017-05-26T21:38:50+00:00

Callers normally treat the config space accessors as returning PCBIOS_* error codes, not Linux error codes (or they don't look at them at all). We have pcibios_err_to_errno() in case the error code needs to be translated. Fixes: 4b1038834739 ("PCI: Don't attempt config access to disconnected devices") Signed-off-by: Brian Norris Signed-off-by: Bjorn Helgaas Reviewed-by: Keith Busch

Merge branch 'pci/misc' into next

2017-04-28T15:34:14+00:00

* pci/misc: PCI: Change pci_host_common_probe() visibility PCI: Fix typo pci_cfg_access_lock() comment PCI: Include pci.h for struct pci_ops definition

PCI: Include PCI-to-PCIe bridges as "Downstream Ports"

2017-04-19T12:44:51+00:00

A PCI/PCI-X to PCI Express bridge, sometimes referred to as a "reverse bridge", is a bridge with conventional PCI or PCI-X on its primary side and a PCI Express Port on its secondary (downstream) side. That PCIe Port is a Downstream Port and could be connected to a slot, just like a Root Port or a Switch Downstream Port. Make pcie_downstream_port() return true for them, so we can access the Slot registers in the PCIe capability. Signed-off-by: Bjorn Helgaas

PCI: Fix typo pci_cfg_access_lock() comment

2017-04-04T17:02:57+00:00

There is no pci_cfg_access_unlocked(). I think the author meant pci_cfg_access_unlock(). Signed-off-by: Brian Norris Signed-off-by: Bjorn Helgaas

PCI: Don't attempt config access to disconnected devices

2017-03-30T03:54:56+00:00

If we've detected the PCI device is disconnected, there is no need to attempt to access its config space since we know the operation will fail. Make all the config reads and writes return -ENODEV error immediately when in such a state. If a caller requests a config read to a disconnected device, return a data value of all 1's. This is the same as what hardware is expected to return when accessing a removed device, but software can do this faster without relying on hardware. Tested-by: Krishna Dhulipala Signed-off-by: Keith Busch Signed-off-by: Bjorn Helgaas Reviewed-by: Christoph Hellwig Reviewed-by: Wei Zhang

PCI: Export PCI device config accessors

2017-03-30T03:48:52+00:00

Replace the inline PCI device config read and write accessors with exported functions. This is preparing for these functions to make use of private data. Tested-by: Krishna Dhulipala Signed-off-by: Keith Busch Signed-off-by: Bjorn Helgaas Reviewed-by: Christoph Hellwig Reviewed-by: Wei Zhang