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authorVaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com>2012-02-02 23:11:20 +0530
committerJesse Barnes <jbarnes@virtuousgeek.org>2012-02-10 12:01:56 -0800
commit8161fe91d8da34c1a231b6e2d4454b4b3179a5d4 (patch)
treecf7e7f08ff22f39abb6c748b121718149a6347b4 /drivers/pci
parent71f6bd4a23130cd2f4b036010c5790b1295290b9 (diff)
downloadop-kernel-dev-8161fe91d8da34c1a231b6e2d4454b4b3179a5d4.zip
op-kernel-dev-8161fe91d8da34c1a231b6e2d4454b4b3179a5d4.tar.gz
PCI: set pci sriov page size before reading SRIOV BAR
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 <linuxram@us.ibm.com> | 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 <svaidy@linux.vnet.ibm.com> Acked-by: Ram Pai <linuxram@us.ibm.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Diffstat (limited to 'drivers/pci')
-rw-r--r--drivers/pci/iov.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c
index 0321fa3..0dab5ec 100644
--- a/drivers/pci/iov.c
+++ b/drivers/pci/iov.c
@@ -347,8 +347,6 @@ static int sriov_enable(struct pci_dev *dev, int nr_virtfn)
return rc;
}
- pci_write_config_dword(dev, iov->pos + PCI_SRIOV_SYS_PGSIZE, iov->pgsz);
-
iov->ctrl |= PCI_SRIOV_CTRL_VFE | PCI_SRIOV_CTRL_MSE;
pci_cfg_access_lock(dev);
pci_write_config_word(dev, iov->pos + PCI_SRIOV_CTRL, iov->ctrl);
@@ -466,6 +464,7 @@ found:
return -EIO;
pgsz &= ~(pgsz - 1);
+ pci_write_config_dword(dev, pos + PCI_SRIOV_SYS_PGSIZE, pgsz);
nres = 0;
for (i = 0; i < PCI_SRIOV_NUM_BARS; i++) {
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