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PCI: Identify Enhanced Allocation (EA) BAR Equivalent resources in sysfs

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Resource flags are exposed to userspace via the sysfs "resource" file.
lspci reads the sysfs file to determine resource properties.

Add a "BAR Equivalent Indicator" flag so lspci can distinguish between
[virtual] and [enhanced] resources.

Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Sean O. Stalley <sean.stalley@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Alex Williamson
2016-05-16 15:12:02 -05:00
committed by Bjorn Helgaas
parent c20e128030
commit 92efb1bd9b
2 changed files with 5 additions and 1 deletions
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2
drivers/pci/pci.c
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@@ -2228,7 +2228,7 @@ void pci_pm_init(struct pci_dev *dev)
static unsigned long pci_ea_flags(struct pci_dev *dev, u8 prop) static unsigned long pci_ea_flags(struct pci_dev *dev, u8 prop)
{ {
unsigned long flags = IORESOURCE_PCI_FIXED; unsigned long flags = IORESOURCE_PCI_FIXED | IORESOURCE_PCI_EA_BEI;
switch (prop) { switch (prop) {
case PCI_EA_P_MEM: case PCI_EA_P_MEM:

4
include/linux/ioport.h
View File

@@ -26,6 +26,9 @@ struct resource {
/* /*
* IO resources have these defined flags. * IO resources have these defined flags.
*
* PCI devices expose these flags to userspace in the "resource" sysfs file,
* so don't move them.
*/ */
#define IORESOURCE_BITS 0x000000ff /* Bus-specific bits */ #define IORESOURCE_BITS 0x000000ff /* Bus-specific bits */
@@ -110,6 +113,7 @@ struct resource {
/* PCI control bits. Shares IORESOURCE_BITS with above PCI ROM. */ /* PCI control bits. Shares IORESOURCE_BITS with above PCI ROM. */
#define IORESOURCE_PCI_FIXED (1<<4) /* Do not move resource */ #define IORESOURCE_PCI_FIXED (1<<4) /* Do not move resource */
#define IORESOURCE_PCI_EA_BEI (1<<5) /* BAR Equivalent Indicator */
/* /*
* I/O Resource Descriptors * I/O Resource Descriptors