linux-toradex.git/drivers/pci/iov.c, branch v3.6.1

PCI: register busn_res for iov bus

2012-06-13T21:42:25+00:00

Insert that to tree.

Signed-off-by: Yinghai Lu 
Signed-off-by: Bjorn Helgaas

PCI: replace struct pci_bus secondary/subordinate with busn_res

2012-06-13T21:42:22+00:00

Replace the struct pci_bus secondary/subordinate members with the
struct resource busn_res.  Later we'll build a resource tree of these
bus numbers.

[bhelgaas: changelog]
Signed-off-by: Yinghai Lu 
Signed-off-by: Bjorn Helgaas

PCI: Rename pci_remove_bus_device to pci_stop_and_remove_bus_device

2012-02-27T20:12:18+00:00

The old pci_remove_bus_device actually did stop and remove.

Make the name reflect that to reduce confusion.

This patch is done by sed scripts and changes back some incorrect
__pci_remove_bus_device changes.

Suggested-by: Jesse Barnes 
Signed-off-by: Yinghai Lu 
Signed-off-by: Jesse Barnes

PCI: Fix /sys warning when sriov enabled and card is hot removed

2012-02-17T17:22:03+00:00

sysfs is a bit stricter now and emits warnings in more cases.

For SRIOV hotplug, we are calling pci_stop_dev() for each VF first
(after we update pci_stop_bus_devices) which remove each VF subdir.  So
double check the VF dir in /sys before trying to remove the physfn link.

Signed-of-by: Yinghai Lu 
Signed-off-by: Jesse Barnes

PCI: set pci sriov page size before reading SRIOV BAR

2012-02-10T20:01:56+00:00

For an SRIOV device, PCI_SRIOV_SYS_PGSIZE should be set before
the PCI_SRIOV_BAR are queried.  The sys pagesize defaults to 4k,
so this change is required on powerpc box with 64k base page size.
    
This is a regression caused due to moving SRIOV init to sriov_enable().
    
| commit afd24ece5c76af87f6fc477f2747b83a764f161c
| Author: Ram Pai 
    
| PCI: delay configuration of SRIOV capability
| The SRIOV capability, namely page size and total_vfs of a device are
| configured during enumeration phase of the device.  This can potentially
| interfere with the PCI operations of the platform, if the IOV capability
| of the device is not enabled.
    
Signed-off-by: Vaidyanathan Srinivasan 
Acked-by: Ram Pai 
Signed-off-by: Jesse Barnes

PCI: delay configuration of SRIOV capability

2012-01-06T20:10:49+00:00

The SRIOV capability, namely page size and total_vfs of a device are
configured during enumeration phase of the device.  This can potentially
interfere with the PCI operations of the platform, if the IOV capability
of the device is not enabled.

The following patch postpones the configuration of the IOV capability of
the device to a later point, when the IOV capability is explicitly
enabled by the device driver.

The patch is tested on x86 and power platform.

Tested-by: Donald Dutile 
Signed-off-by: Ram Pai 
Signed-off-by: Jesse Barnes

PCI: Rework config space blocking services

2012-01-06T20:10:33+00:00

pci_block_user_cfg_access was designed for the use case that a single
context, the IPR driver, temporarily delays user space accesses to the
config space via sysfs. This assumption became invalid by the time
pci_dev_reset was added as locking instance. Today, if you run two loops
in parallel that reset the same device via sysfs, you end up with a
kernel BUG as pci_block_user_cfg_access detect the broken assumption.

This reworks the pci_block_user_cfg_access to a sleeping service
pci_cfg_access_lock and an atomic-compatible variant called
pci_cfg_access_trylock. The former not only blocks user space access as
before but also waits if access was already locked. The latter service
just returns false in this case, allowing the caller to resolve the
conflict instead of raising a BUG.

Adaptions of the ipr driver were originally written by Brian King.

Acked-by: Brian King 
Acked-by: Michael S. Tsirkin 
Signed-off-by: Jan Kiszka 
Signed-off-by: Jesse Barnes

PCI: defer enablement of SRIOV BARS

2011-12-05T18:30:22+00:00

All the PCI BARs of a device are enabled when the device is enabled
using pci_enable_device().  This unnecessarily enables SRIOV BARs of the
device.

On some platforms, which do not support SRIOV as yet, the
pci_enable_device() fails to enable the device if its SRIOV BARs are not
allocated resources correctly.

The following patch fixes the above problem. The SRIOV BARs are now
enabled when IOV capability of the device is enabled in sriov_enable().

NOTE: Note, there is subtle change in the pci_enable_device() API.  Any
driver that depends on SRIOV BARS to be enabled in pci_enable_device()
can fail.

The patch has been touch tested on power and x86 platform.

Tested-by: Michael Wang 
Signed-off-by: Ram Pai 
Signed-off-by: Jesse Barnes

pci: Fix files needing export.h for EXPORT_SYMBOL/THIS_MODULE

2011-10-31T23:31:22+00:00

They were implicitly getting it from device.h --> module.h but
we want to clean that up.  So add the minimal header for these
macros.

Signed-off-by: Paul Gortmaker

PCI: Move ATS implementation into own file

2011-10-14T16:05:33+00:00

ATS does not depend on IOV support, so move the code into
its own file. This file will also include support for the
PRI and PASID capabilities later.
Also give ATS its own Kconfig variable to allow selecting it
without IOV support.

Reviewed-by: Bjorn Helgaas 
Signed-off-by: Joerg Roedel 
Signed-off-by: Jesse Barnes