powerpc/powernv: Shift VF resource with an offset
On PowerNV platform, resource position in M64 BAR implies the PE# the
resource belongs to. In some cases, adjustment of a resource is necessary
to locate it to a correct position in M64 BAR .
This patch adds pnv_pci_vf_resource_shift() to shift the 'real' PF IOV BAR
address according to an offset.
Note:
After doing so, there would be a "hole" in the /proc/iomem when offset
is a positive value. It looks like the device return some mmio back to
the system, which actually no one could use it.
[bhelgaas: rework loops, rework overlap check, index resource[]
conventionally, remove pci_regs.h include, squashed with next patch]
Signed-off-by: Wei Yang <weiyang@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
diff --git a/arch/powerpc/include/asm/pci-bridge.h b/arch/powerpc/include/asm/pci-bridge.h
index 7b8ebc5..8716db4 100644
--- a/arch/powerpc/include/asm/pci-bridge.h
+++ b/arch/powerpc/include/asm/pci-bridge.h
@@ -180,6 +180,10 @@
int pe_number;
#ifdef CONFIG_PCI_IOV
u16 vfs_expanded; /* number of VFs IOV BAR expanded */
+ u16 num_vfs; /* number of VFs enabled*/
+ int offset; /* PE# for the first VF PE */
+#define IODA_INVALID_M64 (-1)
+ int m64_wins[PCI_SRIOV_NUM_BARS];
#endif /* CONFIG_PCI_IOV */
#endif
struct list_head child_list;