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Subject[PATCH 2/5] iommu/vt-d: Consolidate pasid cache invalidation
Date
Merge pasid cache invalidation into iommu->flush.pc_inv.

Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
---
drivers/iommu/intel-iommu.c | 13 +++++++++++++
drivers/iommu/intel-pasid.c | 18 ++----------------
include/linux/intel-iommu.h | 3 +++
3 files changed, 18 insertions(+), 16 deletions(-)

diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index 59e4130161eb..283382584453 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -2994,6 +2994,18 @@ qi_flush_iotlb(struct intel_iommu *iommu, u16 did, u64 addr,
qi_submit_sync(&desc, iommu);
}

+/* PASID cache invalidation */
+static void
+qi_flush_pasid(struct intel_iommu *iommu, u16 did, u32 pasid, u64 granu)
+{
+ struct qi_desc desc = {.qw1 = 0, .qw2 = 0, .qw3 = 0};
+
+ desc.qw0 = QI_PC_PASID(pasid) | QI_PC_DID(did) |
+ QI_PC_GRAN(granu) | QI_PC_TYPE;
+
+ qi_submit_sync(&desc, iommu);
+}
+
static void intel_iommu_init_qi(struct intel_iommu *iommu)
{
/*
@@ -3025,6 +3037,7 @@ static void intel_iommu_init_qi(struct intel_iommu *iommu)
} else {
iommu->flush.cc_inv = qi_flush_context;
iommu->flush.iotlb_inv = qi_flush_iotlb;
+ iommu->flush.pc_inv = qi_flush_pasid;
pr_info("%s: Using Queued invalidation\n", iommu->name);
}
}
diff --git a/drivers/iommu/intel-pasid.c b/drivers/iommu/intel-pasid.c
index 3cb569e76642..dd736f673603 100644
--- a/drivers/iommu/intel-pasid.c
+++ b/drivers/iommu/intel-pasid.c
@@ -359,20 +359,6 @@ pasid_set_flpm(struct pasid_entry *pe, u64 value)
pasid_set_bits(&pe->val[2], GENMASK_ULL(3, 2), value << 2);
}

-static void
-pasid_cache_invalidation_with_pasid(struct intel_iommu *iommu,
- u16 did, int pasid)
-{
- struct qi_desc desc;
-
- desc.qw0 = QI_PC_DID(did) | QI_PC_PASID_SEL | QI_PC_PASID(pasid);
- desc.qw1 = 0;
- desc.qw2 = 0;
- desc.qw3 = 0;
-
- qi_submit_sync(&desc, iommu);
-}
-
static void
iotlb_invalidation_with_pasid(struct intel_iommu *iommu, u16 did, u32 pasid)
{
@@ -421,7 +407,7 @@ void intel_pasid_tear_down_entry(struct intel_iommu *iommu,
if (!ecap_coherent(iommu->ecap))
clflush_cache_range(pte, sizeof(*pte));

- pasid_cache_invalidation_with_pasid(iommu, did, pasid);
+ iommu->flush.pc_inv(iommu, did, pasid, QI_PC_GRAN_PSWD);
iotlb_invalidation_with_pasid(iommu, did, pasid);

/* Device IOTLB doesn't need to be flushed in caching mode. */
@@ -437,7 +423,7 @@ static void pasid_flush_caches(struct intel_iommu *iommu,
clflush_cache_range(pte, sizeof(*pte));

if (cap_caching_mode(iommu->cap)) {
- pasid_cache_invalidation_with_pasid(iommu, did, pasid);
+ iommu->flush.pc_inv(iommu, did, pasid, QI_PC_GRAN_PSWD);
iotlb_invalidation_with_pasid(iommu, did, pasid);
} else {
iommu_flush_write_buffer(iommu);
diff --git a/include/linux/intel-iommu.h b/include/linux/intel-iommu.h
index ac725a4ce1c1..c32ff2a7d958 100644
--- a/include/linux/intel-iommu.h
+++ b/include/linux/intel-iommu.h
@@ -344,6 +344,9 @@ enum {
#define QI_PC_PASID(pasid) (((u64)pasid) << 32)
#define QI_PC_DID(did) (((u64)did) << 16)
#define QI_PC_GRAN(gran) (((u64)gran) << 4)
+#define QI_PC_GRAN_DS 0
+#define QI_PC_GRAN_PSWD 1
+#define QI_PC_GRAN_GLOBAL 3

#define QI_PC_ALL_PASIDS (QI_PC_TYPE | QI_PC_GRAN(0))
#define QI_PC_PASID_SEL (QI_PC_TYPE | QI_PC_GRAN(1))
--
2.17.1
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