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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39

drivers/pci/iov.c

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1

drivers/pci/pci.h

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3

include/linux/pci.h

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