PCI: initialize and release SR-IOV capability
If a device has the SR-IOV capability, initialize it (set the ARI
Capable Hierarchy in the lowest numbered PF if necessary; calculate
the System Page Size for the VF MMIO, probe the VF Offset, Stride
and BARs). A lock for the VF bus allocation is also initialized if
a PF is the lowest numbered PF.
Reviewed-by: Matthew Wilcox <willy@linux.intel.com>
Signed-off-by: Yu Zhao <yu.zhao@intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
diff --git a/include/linux/pci_regs.h b/include/linux/pci_regs.h
index b647a4d..d4e6638 100644
--- a/include/linux/pci_regs.h
+++ b/include/linux/pci_regs.h
@@ -375,6 +375,7 @@
#define PCI_EXP_TYPE_UPSTREAM 0x5 /* Upstream Port */
#define PCI_EXP_TYPE_DOWNSTREAM 0x6 /* Downstream Port */
#define PCI_EXP_TYPE_PCI_BRIDGE 0x7 /* PCI/PCI-X Bridge */
+#define PCI_EXP_TYPE_RC_END 0x9 /* Root Complex Integrated Endpoint */
#define PCI_EXP_FLAGS_SLOT 0x0100 /* Slot implemented */
#define PCI_EXP_FLAGS_IRQ 0x3e00 /* Interrupt message number */
#define PCI_EXP_DEVCAP 4 /* Device capabilities */
@@ -498,6 +499,7 @@
#define PCI_EXT_CAP_ID_DSN 3
#define PCI_EXT_CAP_ID_PWR 4
#define PCI_EXT_CAP_ID_ARI 14
+#define PCI_EXT_CAP_ID_SRIOV 16
/* Advanced Error Reporting */
#define PCI_ERR_UNCOR_STATUS 4 /* Uncorrectable Error Status */
@@ -615,4 +617,35 @@
#define PCI_ARI_CTRL_ACS 0x0002 /* ACS Function Groups Enable */
#define PCI_ARI_CTRL_FG(x) (((x) >> 4) & 7) /* Function Group */
+/* Single Root I/O Virtualization */
+#define PCI_SRIOV_CAP 0x04 /* SR-IOV Capabilities */
+#define PCI_SRIOV_CAP_VFM 0x01 /* VF Migration Capable */
+#define PCI_SRIOV_CAP_INTR(x) ((x) >> 21) /* Interrupt Message Number */
+#define PCI_SRIOV_CTRL 0x08 /* SR-IOV Control */
+#define PCI_SRIOV_CTRL_VFE 0x01 /* VF Enable */
+#define PCI_SRIOV_CTRL_VFM 0x02 /* VF Migration Enable */
+#define PCI_SRIOV_CTRL_INTR 0x04 /* VF Migration Interrupt Enable */
+#define PCI_SRIOV_CTRL_MSE 0x08 /* VF Memory Space Enable */
+#define PCI_SRIOV_CTRL_ARI 0x10 /* ARI Capable Hierarchy */
+#define PCI_SRIOV_STATUS 0x0a /* SR-IOV Status */
+#define PCI_SRIOV_STATUS_VFM 0x01 /* VF Migration Status */
+#define PCI_SRIOV_INITIAL_VF 0x0c /* Initial VFs */
+#define PCI_SRIOV_TOTAL_VF 0x0e /* Total VFs */
+#define PCI_SRIOV_NUM_VF 0x10 /* Number of VFs */
+#define PCI_SRIOV_FUNC_LINK 0x12 /* Function Dependency Link */
+#define PCI_SRIOV_VF_OFFSET 0x14 /* First VF Offset */
+#define PCI_SRIOV_VF_STRIDE 0x16 /* Following VF Stride */
+#define PCI_SRIOV_VF_DID 0x1a /* VF Device ID */
+#define PCI_SRIOV_SUP_PGSIZE 0x1c /* Supported Page Sizes */
+#define PCI_SRIOV_SYS_PGSIZE 0x20 /* System Page Size */
+#define PCI_SRIOV_BAR 0x24 /* VF BAR0 */
+#define PCI_SRIOV_NUM_BARS 6 /* Number of VF BARs */
+#define PCI_SRIOV_VFM 0x3c /* VF Migration State Array Offset*/
+#define PCI_SRIOV_VFM_BIR(x) ((x) & 7) /* State BIR */
+#define PCI_SRIOV_VFM_OFFSET(x) ((x) & ~7) /* State Offset */
+#define PCI_SRIOV_VFM_UA 0x0 /* Inactive.Unavailable */
+#define PCI_SRIOV_VFM_MI 0x1 /* Dormant.MigrateIn */
+#define PCI_SRIOV_VFM_MO 0x2 /* Active.MigrateOut */
+#define PCI_SRIOV_VFM_AV 0x3 /* Active.Available */
+
#endif /* LINUX_PCI_REGS_H */