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authorJoerg Roedel <joerg.roedel@amd.com>2012-06-21 16:46:04 +0200
committerJoerg Roedel <joerg.roedel@amd.com>2012-09-28 17:41:22 +0200
commit7ef2798deb695f112f25e348b199dca79eb1ea68 (patch)
tree04564334f60fd0b4d7d377f164297dcc39c026e5 /drivers/iommu
parentf6fec00a9202987f1be2ae0a722518b742a9a799 (diff)
downloadlinux-7ef2798deb695f112f25e348b199dca79eb1ea68.tar.bz2
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>
Diffstat (limited to 'drivers/iommu')
-rw-r--r--drivers/iommu/amd_iommu.c27
-rw-r--r--drivers/iommu/amd_iommu_types.h3
2 files changed, 30 insertions, 0 deletions
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index b6a8079ff7bb..e27b354c3e9b 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 1a7d48078d3f..90afccb1237b 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