iommu/amd: Setup PPR log when supported by IOMMU
Allocate and enable a log buffer for peripheral page faults
when the IOMMU supports this feature.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
diff --git a/drivers/iommu/amd_iommu_types.h b/drivers/iommu/amd_iommu_types.h
index 0d984ca..4dc2309 100644
--- a/drivers/iommu/amd_iommu_types.h
+++ b/drivers/iommu/amd_iommu_types.h
@@ -69,11 +69,14 @@
#define MMIO_EXCL_BASE_OFFSET 0x0020
#define MMIO_EXCL_LIMIT_OFFSET 0x0028
#define MMIO_EXT_FEATURES 0x0030
+#define MMIO_PPR_LOG_OFFSET 0x0038
#define MMIO_CMD_HEAD_OFFSET 0x2000
#define MMIO_CMD_TAIL_OFFSET 0x2008
#define MMIO_EVT_HEAD_OFFSET 0x2010
#define MMIO_EVT_TAIL_OFFSET 0x2018
#define MMIO_STATUS_OFFSET 0x2020
+#define MMIO_PPR_HEAD_OFFSET 0x2030
+#define MMIO_PPR_TAIL_OFFSET 0x2038
/* Extended Feature Bits */
@@ -125,6 +128,7 @@
#define CONTROL_CMDBUF_EN 0x0cULL
#define CONTROL_PPFLOG_EN 0x0dULL
#define CONTROL_PPFINT_EN 0x0eULL
+#define CONTROL_PPR_EN 0x0fULL
/* command specific defines */
#define CMD_COMPL_WAIT 0x01
@@ -168,6 +172,13 @@
#define EVT_BUFFER_SIZE 8192 /* 512 entries */
#define EVT_LEN_MASK (0x9ULL << 56)
+/* Constants for PPR Log handling */
+#define PPR_LOG_ENTRIES 512
+#define PPR_LOG_SIZE_SHIFT 56
+#define PPR_LOG_SIZE_512 (0x9ULL << PPR_LOG_SIZE_SHIFT)
+#define PPR_ENTRY_SIZE 16
+#define PPR_LOG_SIZE (PPR_ENTRY_SIZE * PPR_LOG_ENTRIES)
+
#define PAGE_MODE_NONE 0x00
#define PAGE_MODE_1_LEVEL 0x01
#define PAGE_MODE_2_LEVEL 0x02
@@ -434,6 +445,9 @@
/* MSI number for event interrupt */
u16 evt_msi_num;
+ /* Base of the PPR log, if present */
+ u8 *ppr_log;
+
/* true if interrupts for this IOMMU are already enabled */
bool int_enabled;