You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.

Chris Wright 6faf17f6f1 PCI SR-IOV: correct broken resource alignment calculations ... An SR-IOV capable device includes an SR-IOV PCIe capability which describes the Virtual Function (VF) BAR requirements. A typical SR-IOV device can support multiple VFs whose BARs must be in a contiguous region, effectively an array of VF BARs. The BAR reports the size requirement for a single VF. We calculate the full range needed by simply multiplying the VF BAR size with the number of possible VFs and create a resource spanning the full range. This all seems sane enough except it artificially inflates the alignment requirement for the VF BAR. The VF BAR need only be aligned to the size of a single BAR not the contiguous range of VF BARs. This can cause us to fail to allocate resources for the BAR despite the fact that we actually have enough space. This patch adds a thin PCI specific layer over the generic resource_alignment() function which is aware of the special nature of VF BARs and does sorting and allocation based on the smaller alignment requirement. I recognize that while resource_alignment is generic, it's basically a PCI helper. An alternative to this patch is to add PCI VF BAR specific information to struct resource. I opted for the extra layer rather than adding such PCI specific information to struct resource. This does have the slight downside that we don't cache the BAR size and re-read for each alignment query (happens a small handful of times during boot for each VF BAR). Signed-off-by: Chris Wright <chrisw@sous-sol.org> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Matthew Wilcox <matthew@wil.cx> Cc: Yu Zhao <yu.zhao@intel.com> Cc: stable@kernel.org Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>		16 years ago
..
hotplug	PCI hotplug: SGI hotplug: do not use hotplug_slot_attr	16 years ago
pcie	…
.gitignore	…
Kconfig	…
Makefile	…
access.c	…
bus.c	…
dmar.c	…
hotplug-pci.c	…
hotplug.c	…
htirq.c	…
intel-iommu.c	intel-iommu: Fix enabling snooping feature by mistake	16 years ago
intr_remapping.c	…
intr_remapping.h	…
iov.c	PCI SR-IOV: correct broken resource alignment calculations	16 years ago
iova.c	…
irq.c	…
msi.c	…
msi.h	…
pci-acpi.c	…
pci-driver.c	PCI: check saved state before restore	16 years ago
pci-stub.c	…
pci-sysfs.c	…
pci.c	PCI: check saved state before restore	16 years ago
pci.h	PCI SR-IOV: correct broken resource alignment calculations	16 years ago
probe.c	…
proc.c	…
quirks.c	…
remove.c	…
rom.c	…
search.c	…
setup-bus.c	PCI SR-IOV: correct broken resource alignment calculations	16 years ago
setup-irq.c	…
setup-res.c	PCI SR-IOV: correct broken resource alignment calculations	16 years ago
slot.c	…
syscall.c	headers: smp_lock.h redux	16 years ago