[PATCH RFC 01/13] iommu: arm-smmu-qcom: Configure lpac device with split address space

[Anna Maniscalco]

We want the context bank used by LPAC to use split address space just
like GFX.

Signed-off-by: Anna Maniscalco <anna.maniscalco2000 at gmail.com>
---
 drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
index edd41b5a3b6a..48a590aaeb5e 100644
--- a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
+++ b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
@@ -35,6 +35,8 @@
 static const struct of_device_id qcom_smmu_actlr_client_of_match[] = {
 	{ .compatible = "qcom,adreno",
 			.data = (const void *) (PREFETCH_DEEP | CPRE | CMTLB) },
+	{ .compatible = "qcom,lpac",
+			.data = (const void *) (PREFETCH_DEEP | CPRE | CMTLB) },
 	{ .compatible = "qcom,adreno-gmu",
 			.data = (const void *) (PREFETCH_DEEP | CPRE | CMTLB) },
 	{ .compatible = "qcom,adreno-smmu",
@@ -217,6 +219,7 @@ static void qcom_adreno_smmu_set_prr_addr(const void *cookie, phys_addr_t page_a
 }
 
 #define QCOM_ADRENO_SMMU_GPU_SID 0
+#define QCOM_ADRENO_SMMU_LPAC_SID 1
 
 static bool qcom_adreno_smmu_is_gpu_device(struct device *dev)
 {
@@ -230,7 +233,8 @@ static bool qcom_adreno_smmu_is_gpu_device(struct device *dev)
 	for (i = 0; i < fwspec->num_ids; i++) {
 		u16 sid = FIELD_GET(ARM_SMMU_SMR_ID, fwspec->ids[i]);
 
-		if (sid == QCOM_ADRENO_SMMU_GPU_SID)
+		if (sid == QCOM_ADRENO_SMMU_GPU_SID ||
+		    sid == QCOM_ADRENO_SMMU_LPAC_SID)
 			return true;
 	}
 
@@ -305,9 +309,9 @@ static int qcom_adreno_smmu_alloc_context_bank(struct arm_smmu_domain *smmu_doma
 	 */
 	if (qcom_adreno_smmu_is_gpu_device(dev)) {
 		start = 0;
-		count = 1;
+		count = 2;
 	} else {
-		start = 1;
+		start = 2;
 		count = smmu->num_context_banks;
 	}
 
@@ -394,6 +398,7 @@ static int qcom_adreno_smmu_init_context(struct arm_smmu_domain *smmu_domain,
 
 static const struct of_device_id qcom_smmu_client_of_match[] __maybe_unused = {
 	{ .compatible = "qcom,adreno" },
+	{ .compatible = "qcom,lpac" },
 	{ .compatible = "qcom,adreno-gmu" },
 	{ .compatible = "qcom,glymur-mdss" },
 	{ .compatible = "qcom,mdp4" },

-- 
2.54.0