iommu/amd: Add IRTE invalidation routine

Add routine to invalidate the IOMMU cache for interupt
translations. Also include the IRTE caches when flushing all
IOMMU caches.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>

2 files changed, 30 insertions, 0 deletions

diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index b6a8079ff7b..e27b354c3e9 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -902,6 +902,13 @@ static void build_inv_all(struct iommu_cmd *cmd)
         CMD_SET_TYPE(cmd, CMD_INV_ALL);
 }
 
+static void build_inv_irt(struct iommu_cmd *cmd, u16 devid)
+{
+        memset(cmd, 0, sizeof(*cmd));
+        cmd->data[0] = devid;
+        CMD_SET_TYPE(cmd, CMD_INV_IRT);
+}
+
 /*
  * Writes the command to the IOMMUs command buffer and informs the
  * hardware about the new command.
@@ -1023,12 +1030,32 @@ static void iommu_flush_all(struct amd_iommu *iommu)
         iommu_completion_wait(iommu);
 }
 
+static void iommu_flush_irt(struct amd_iommu *iommu, u16 devid)
+{
+        struct iommu_cmd cmd;
+
+        build_inv_irt(&cmd, devid);
+
+        iommu_queue_command(iommu, &cmd);
+}
+
+static void iommu_flush_irt_all(struct amd_iommu *iommu)
+{
+        u32 devid;
+
+        for (devid = 0; devid <= MAX_DEV_TABLE_ENTRIES; devid++)
+                iommu_flush_irt(iommu, devid);
+
+        iommu_completion_wait(iommu);
+}
+
 void iommu_flush_all_caches(struct amd_iommu *iommu)
 {
         if (iommu_feature(iommu, FEATURE_IA)) {
                 iommu_flush_all(iommu);
         } else {
                 iommu_flush_dte_all(iommu);
+                iommu_flush_irt_all(iommu);
                 iommu_flush_tlb_all(iommu);
         }
 }
diff --git a/drivers/iommu/amd_iommu_types.h b/drivers/iommu/amd_iommu_types.h
index 1a7d48078d3..90afccb1237 100644
--- a/drivers/iommu/amd_iommu_types.h
+++ b/drivers/iommu/amd_iommu_types.h
@@ -152,6 +152,7 @@
 #define CMD_INV_DEV_ENTRY       0x02
 #define CMD_INV_IOMMU_PAGES     0x03
 #define CMD_INV_IOTLB_PAGES     0x04
+#define CMD_INV_IRT             0x05
 #define CMD_COMPLETE_PPR        0x07
 #define CMD_INV_ALL             0x08
 
@@ -184,6 +185,8 @@
 #define DEV_ENTRY_MODE_MASK     0x07
 #define DEV_ENTRY_MODE_SHIFT    0x09
 
+#define MAX_DEV_TABLE_ENTRIES   0xffff
+
 /* constants to configure the command buffer */
 #define CMD_BUFFER_SIZE    8192
 #define CMD_BUFFER_UNINITIALIZED 1