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PCI: Keep individual VF BAR size in struct pci_sriov

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Currently we don't store the individual VF BAR size.  We calculate it when
needed by dividing the PF's IOV resource size (which contains space for
*all* the VFs) by total_VFs or by reading the BAR in the SR-IOV capability
again.

Keep the individual VF BAR size in struct pci_sriov.barsz[], add
pci_iov_resource_size() to retrieve it, and use that instead of doing the
division or reading the SR-IOV capability BAR.

[bhelgaas: rename to "barsz[]", simplify barsz[] index computation, remove
SR-IOV capability BAR sizing]
Signed-off-by: Wei Yang <weiyang@linux.vnet.ibm.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Wei Yang 2015-03-25 16:23:44 +08:00 • committed by Benjamin Herrenschmidt
parent e88ae01d2c
commit 0e6c9122a6
3 changed files with 24 additions and 19 deletions
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1
drivers/pci/pci.h
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@ -247,6 +247,7 @@ struct pci_sriov {
struct pci_dev *dev; /* lowest numbered PF */
struct pci_dev *self; /* this PF */
struct mutex lock; /* lock for VF bus */
resource_size_t barsz[PCI_SRIOV_NUM_BARS]; /* VF BAR size */
};
#ifdef CONFIG_PCI_ATS