Merge tag 'arm-smmu-updates' of git://git.kernel.org/pub/scm/linux/kernel/git/will/linux into arm/smmu

Arm SMMU updates for 6.2

- Report a warning if we fail to disable the MMU-500 prefetcher

- Usual mass of devicetree binding additions

- Qualcomm SMMU refactoring and generic "qcom,smmu-500" addition

4 files changed, 133 insertions, 139 deletions

diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu-impl.c b/drivers/iommu/arm/arm-smmu/arm-smmu-impl.c
index 658f3cc83278..9dc772f2cbb2 100644
--- a/drivers/iommu/arm/arm-smmu/arm-smmu-impl.c
+++ b/drivers/iommu/arm/arm-smmu/arm-smmu-impl.c
@@ -136,6 +136,9 @@ int arm_mmu500_reset(struct arm_smmu_device *smmu)
 		reg = arm_smmu_cb_read(smmu, i, ARM_SMMU_CB_ACTLR);
 		reg &= ~ARM_MMU500_ACTLR_CPRE;
 		arm_smmu_cb_write(smmu, i, ARM_SMMU_CB_ACTLR, reg);
+		reg = arm_smmu_cb_read(smmu, i, ARM_SMMU_CB_ACTLR);
+		if (reg & ARM_MMU500_ACTLR_CPRE)
+			dev_warn_once(smmu->dev, "Failed to disable prefetcher [errata #841119 and #826419], check ACR.CACHE_LOCK\n");
 	}
 
 	return 0;
diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom-debug.c b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom-debug.c
index 6eed8e67a0ca..74e9ef2fd580 100644
--- a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom-debug.c
+++ b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom-debug.c
@@ -10,16 +10,6 @@
 #include "arm-smmu.h"
 #include "arm-smmu-qcom.h"
 
-enum qcom_smmu_impl_reg_offset {
-	QCOM_SMMU_TBU_PWR_STATUS,
-	QCOM_SMMU_STATS_SYNC_INV_TBU_ACK,
-	QCOM_SMMU_MMU2QSS_AND_SAFE_WAIT_CNTR,
-};
-
-struct qcom_smmu_config {
-	const u32 *reg_offset;
-};
-
 void qcom_smmu_tlb_sync_debug(struct arm_smmu_device *smmu)
 {
 	int ret;
@@ -59,84 +49,3 @@ void qcom_smmu_tlb_sync_debug(struct arm_smmu_device *smmu)
 			tbu_pwr_status, sync_inv_ack, sync_inv_progress);
 	}
 }
-
-/* Implementation Defined Register Space 0 register offsets */
-static const u32 qcom_smmu_impl0_reg_offset[] = {
-	[QCOM_SMMU_TBU_PWR_STATUS]		= 0x2204,
-	[QCOM_SMMU_STATS_SYNC_INV_TBU_ACK]	= 0x25dc,
-	[QCOM_SMMU_MMU2QSS_AND_SAFE_WAIT_CNTR]	= 0x2670,
-};
-
-static const struct qcom_smmu_config qcm2290_smmu_cfg = {
-	.reg_offset = qcom_smmu_impl0_reg_offset,
-};
-
-static const struct qcom_smmu_config sc7180_smmu_cfg = {
-	.reg_offset = qcom_smmu_impl0_reg_offset,
-};
-
-static const struct qcom_smmu_config sc7280_smmu_cfg = {
-	.reg_offset = qcom_smmu_impl0_reg_offset,
-};
-
-static const struct qcom_smmu_config sc8180x_smmu_cfg = {
-	.reg_offset = qcom_smmu_impl0_reg_offset,
-};
-
-static const struct qcom_smmu_config sc8280xp_smmu_cfg = {
-	.reg_offset = qcom_smmu_impl0_reg_offset,
-};
-
-static const struct qcom_smmu_config sm6125_smmu_cfg = {
-	.reg_offset = qcom_smmu_impl0_reg_offset,
-};
-
-static const struct qcom_smmu_config sm6350_smmu_cfg = {
-	.reg_offset = qcom_smmu_impl0_reg_offset,
-};
-
-static const struct qcom_smmu_config sm8150_smmu_cfg = {
-	.reg_offset = qcom_smmu_impl0_reg_offset,
-};
-
-static const struct qcom_smmu_config sm8250_smmu_cfg = {
-	.reg_offset = qcom_smmu_impl0_reg_offset,
-};
-
-static const struct qcom_smmu_config sm8350_smmu_cfg = {
-	.reg_offset = qcom_smmu_impl0_reg_offset,
-};
-
-static const struct qcom_smmu_config sm8450_smmu_cfg = {
-	.reg_offset = qcom_smmu_impl0_reg_offset,
-};
-
-static const struct of_device_id __maybe_unused qcom_smmu_impl_debug_match[] = {
-	{ .compatible = "qcom,msm8998-smmu-v2" },
-	{ .compatible = "qcom,qcm2290-smmu-500", .data = &qcm2290_smmu_cfg },
-	{ .compatible = "qcom,sc7180-smmu-500", .data = &sc7180_smmu_cfg },
-	{ .compatible = "qcom,sc7280-smmu-500", .data = &sc7280_smmu_cfg},
-	{ .compatible = "qcom,sc8180x-smmu-500", .data = &sc8180x_smmu_cfg },
-	{ .compatible = "qcom,sc8280xp-smmu-500", .data = &sc8280xp_smmu_cfg },
-	{ .compatible = "qcom,sdm630-smmu-v2" },
-	{ .compatible = "qcom,sdm845-smmu-500" },
-	{ .compatible = "qcom,sm6125-smmu-500", .data = &sm6125_smmu_cfg},
-	{ .compatible = "qcom,sm6350-smmu-500", .data = &sm6350_smmu_cfg},
-	{ .compatible = "qcom,sm8150-smmu-500", .data = &sm8150_smmu_cfg },
-	{ .compatible = "qcom,sm8250-smmu-500", .data = &sm8250_smmu_cfg },
-	{ .compatible = "qcom,sm8350-smmu-500", .data = &sm8350_smmu_cfg },
-	{ .compatible = "qcom,sm8450-smmu-500", .data = &sm8450_smmu_cfg },
-	{ }
-};
-
-const void *qcom_smmu_impl_data(struct arm_smmu_device *smmu)
-{
-	const struct of_device_id *match;
-	const struct device_node *np = smmu->dev->of_node;
-
-	match = of_match_node(qcom_smmu_impl_debug_match, np);
-	if (!match)
-		return NULL;
-
-	return match->data;
-}
diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
index b2708de25ea3..91d404deb115 100644
--- a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
+++ b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
@@ -361,6 +361,8 @@ static int qcom_sdm845_smmu500_reset(struct arm_smmu_device *smmu)
 {
 	int ret;
 
+	arm_mmu500_reset(smmu);
+
 	/*
 	 * To address performance degradation in non-real time clients,
 	 * such as USB and UFS, turn off wait-for-safe on sdm845 based boards,
@@ -374,41 +376,67 @@ static int qcom_sdm845_smmu500_reset(struct arm_smmu_device *smmu)
 	return ret;
 }
 
-static int qcom_smmu500_reset(struct arm_smmu_device *smmu)
-{
-	const struct device_node *np = smmu->dev->of_node;
-
-	arm_mmu500_reset(smmu);
-
-	if (of_device_is_compatible(np, "qcom,sdm845-smmu-500"))
-		return qcom_sdm845_smmu500_reset(smmu);
+static const struct arm_smmu_impl qcom_smmu_v2_impl = {
+	.init_context = qcom_smmu_init_context,
+	.cfg_probe = qcom_smmu_cfg_probe,
+	.def_domain_type = qcom_smmu_def_domain_type,
+	.write_s2cr = qcom_smmu_write_s2cr,
+	.tlb_sync = qcom_smmu_tlb_sync,
+};
 
-	return 0;
-}
+static const struct arm_smmu_impl qcom_smmu_500_impl = {
+	.init_context = qcom_smmu_init_context,
+	.cfg_probe = qcom_smmu_cfg_probe,
+	.def_domain_type = qcom_smmu_def_domain_type,
+	.reset = arm_mmu500_reset,
+	.write_s2cr = qcom_smmu_write_s2cr,
+	.tlb_sync = qcom_smmu_tlb_sync,
+};
 
-static const struct arm_smmu_impl qcom_smmu_impl = {
+static const struct arm_smmu_impl sdm845_smmu_500_impl = {
 	.init_context = qcom_smmu_init_context,
 	.cfg_probe = qcom_smmu_cfg_probe,
 	.def_domain_type = qcom_smmu_def_domain_type,
-	.reset = qcom_smmu500_reset,
+	.reset = qcom_sdm845_smmu500_reset,
 	.write_s2cr = qcom_smmu_write_s2cr,
 	.tlb_sync = qcom_smmu_tlb_sync,
 };
 
-static const struct arm_smmu_impl qcom_adreno_smmu_impl = {
+static const struct arm_smmu_impl qcom_adreno_smmu_v2_impl = {
+	.init_context = qcom_adreno_smmu_init_context,
+	.def_domain_type = qcom_smmu_def_domain_type,
+	.alloc_context_bank = qcom_adreno_smmu_alloc_context_bank,
+	.write_sctlr = qcom_adreno_smmu_write_sctlr,
+	.tlb_sync = qcom_smmu_tlb_sync,
+};
+
+static const struct arm_smmu_impl qcom_adreno_smmu_500_impl = {
 	.init_context = qcom_adreno_smmu_init_context,
 	.def_domain_type = qcom_smmu_def_domain_type,
-	.reset = qcom_smmu500_reset,
+	.reset = arm_mmu500_reset,
 	.alloc_context_bank = qcom_adreno_smmu_alloc_context_bank,
 	.write_sctlr = qcom_adreno_smmu_write_sctlr,
 	.tlb_sync = qcom_smmu_tlb_sync,
 };
 
 static struct arm_smmu_device *qcom_smmu_create(struct arm_smmu_device *smmu,
-		const struct arm_smmu_impl *impl)
+		const struct qcom_smmu_match_data *data)
 {
+	const struct device_node *np = smmu->dev->of_node;
+	const struct arm_smmu_impl *impl;
 	struct qcom_smmu *qsmmu;
 
+	if (!data)
+		return ERR_PTR(-EINVAL);
+
+	if (np && of_device_is_compatible(np, "qcom,adreno-smmu"))
+		impl = data->adreno_impl;
+	else
+		impl = data->impl;
+
+	if (!impl)
+		return smmu;
+
 	/* Check to make sure qcom_scm has finished probing */
 	if (!qcom_scm_is_available())
 		return ERR_PTR(-EPROBE_DEFER);
@@ -418,27 +446,77 @@ static struct arm_smmu_device *qcom_smmu_create(struct arm_smmu_device *smmu,
 		return ERR_PTR(-ENOMEM);
 
 	qsmmu->smmu.impl = impl;
-	qsmmu->cfg = qcom_smmu_impl_data(smmu);
+	qsmmu->cfg = data->cfg;
 
 	return &qsmmu->smmu;
 }
 
+/* Implementation Defined Register Space 0 register offsets */
+static const u32 qcom_smmu_impl0_reg_offset[] = {
+	[QCOM_SMMU_TBU_PWR_STATUS]		= 0x2204,
+	[QCOM_SMMU_STATS_SYNC_INV_TBU_ACK]	= 0x25dc,
+	[QCOM_SMMU_MMU2QSS_AND_SAFE_WAIT_CNTR]	= 0x2670,
+};
+
+static const struct qcom_smmu_config qcom_smmu_impl0_cfg = {
+	.reg_offset = qcom_smmu_impl0_reg_offset,
+};
+
+/*
+ * It is not yet possible to use MDP SMMU with the bypass quirk on the msm8996,
+ * there are not enough context banks.
+ */
+static const struct qcom_smmu_match_data msm8996_smmu_data = {
+	.impl = NULL,
+	.adreno_impl = &qcom_adreno_smmu_v2_impl,
+};
+
+static const struct qcom_smmu_match_data qcom_smmu_v2_data = {
+	.impl = &qcom_smmu_v2_impl,
+	.adreno_impl = &qcom_adreno_smmu_v2_impl,
+};
+
+static const struct qcom_smmu_match_data sdm845_smmu_500_data = {
+	.impl = &sdm845_smmu_500_impl,
+	/*
+	 * No need for adreno impl here. On sdm845 the Adreno SMMU is handled
+	 * by the separate sdm845-smmu-v2 device.
+	 */
+	/* Also no debug configuration. */
+};
+
+static const struct qcom_smmu_match_data qcom_smmu_500_impl0_data = {
+	.impl = &qcom_smmu_500_impl,
+	.adreno_impl = &qcom_adreno_smmu_500_impl,
+	.cfg = &qcom_smmu_impl0_cfg,
+};
+
+/*
+ * Do not add any more qcom,SOC-smmu-500 entries to this list, unless they need
+ * special handling and can not be covered by the qcom,smmu-500 entry.
+ */
 static const struct of_device_id __maybe_unused qcom_smmu_impl_of_match[] = {
-	{ .compatible = "qcom,msm8998-smmu-v2" },
-	{ .compatible = "qcom,qcm2290-smmu-500" },
-	{ .compatible = "qcom,sc7180-smmu-500" },
-	{ .compatible = "qcom,sc7280-smmu-500" },
-	{ .compatible = "qcom,sc8180x-smmu-500" },
-	{ .compatible = "qcom,sc8280xp-smmu-500" },
-	{ .compatible = "qcom,sdm630-smmu-v2" },
-	{ .compatible = "qcom,sdm845-smmu-500" },
-	{ .compatible = "qcom,sm6125-smmu-500" },
-	{ .compatible = "qcom,sm6350-smmu-500" },
-	{ .compatible = "qcom,sm6375-smmu-500" },
-	{ .compatible = "qcom,sm8150-smmu-500" },
-	{ .compatible = "qcom,sm8250-smmu-500" },
-	{ .compatible = "qcom,sm8350-smmu-500" },
-	{ .compatible = "qcom,sm8450-smmu-500" },
+	{ .compatible = "qcom,msm8996-smmu-v2", .data = &msm8996_smmu_data },
+	{ .compatible = "qcom,msm8998-smmu-v2", .data = &qcom_smmu_v2_data },
+	{ .compatible = "qcom,qcm2290-smmu-500", .data = &qcom_smmu_500_impl0_data },
+	{ .compatible = "qcom,qdu1000-smmu-500", .data = &qcom_smmu_500_impl0_data  },
+	{ .compatible = "qcom,sc7180-smmu-500", .data = &qcom_smmu_500_impl0_data },
+	{ .compatible = "qcom,sc7280-smmu-500", .data = &qcom_smmu_500_impl0_data },
+	{ .compatible = "qcom,sc8180x-smmu-500", .data = &qcom_smmu_500_impl0_data },
+	{ .compatible = "qcom,sc8280xp-smmu-500", .data = &qcom_smmu_500_impl0_data },
+	{ .compatible = "qcom,sdm630-smmu-v2", .data = &qcom_smmu_v2_data },
+	{ .compatible = "qcom,sdm845-smmu-v2", .data = &qcom_smmu_v2_data },
+	{ .compatible = "qcom,sdm845-smmu-500", .data = &sdm845_smmu_500_data },
+	{ .compatible = "qcom,sm6115-smmu-500", .data = &qcom_smmu_500_impl0_data},
+	{ .compatible = "qcom,sm6125-smmu-500", .data = &qcom_smmu_500_impl0_data },
+	{ .compatible = "qcom,sm6350-smmu-v2", .data = &qcom_smmu_v2_data },
+	{ .compatible = "qcom,sm6350-smmu-500", .data = &qcom_smmu_500_impl0_data },
+	{ .compatible = "qcom,sm6375-smmu-500", .data = &qcom_smmu_500_impl0_data },
+	{ .compatible = "qcom,sm8150-smmu-500", .data = &qcom_smmu_500_impl0_data },
+	{ .compatible = "qcom,sm8250-smmu-500", .data = &qcom_smmu_500_impl0_data },
+	{ .compatible = "qcom,sm8350-smmu-500", .data = &qcom_smmu_500_impl0_data },
+	{ .compatible = "qcom,sm8450-smmu-500", .data = &qcom_smmu_500_impl0_data },
+	{ .compatible = "qcom,smmu-500", .data = &qcom_smmu_500_impl0_data },
 	{ }
 };
 
@@ -453,26 +531,19 @@ static struct acpi_platform_list qcom_acpi_platlist[] = {
 struct arm_smmu_device *qcom_smmu_impl_init(struct arm_smmu_device *smmu)
 {
 	const struct device_node *np = smmu->dev->of_node;
+	const struct of_device_id *match;
 
 #ifdef CONFIG_ACPI
 	if (np == NULL) {
 		/* Match platform for ACPI boot */
 		if (acpi_match_platform_list(qcom_acpi_platlist) >= 0)
-			return qcom_smmu_create(smmu, &qcom_smmu_impl);
+			return qcom_smmu_create(smmu, &qcom_smmu_500_impl0_data);
 	}
 #endif
 
-	/*
-	 * Do not change this order of implementation, i.e., first adreno
-	 * smmu impl and then apss smmu since we can have both implementing
-	 * arm,mmu-500 in which case we will miss setting adreno smmu specific
-	 * features if the order is changed.
-	 */
-	if (of_device_is_compatible(np, "qcom,adreno-smmu"))
-		return qcom_smmu_create(smmu, &qcom_adreno_smmu_impl);
-
-	if (of_match_node(qcom_smmu_impl_of_match, np))
-		return qcom_smmu_create(smmu, &qcom_smmu_impl);
+	match = of_match_node(qcom_smmu_impl_of_match, np);
+	if (match)
+		return qcom_smmu_create(smmu, match->data);
 
 	return smmu;
 }
diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.h b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.h
index 99ec8f8629a0..593910567b88 100644
--- a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.h
+++ b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.h
@@ -14,15 +14,26 @@ struct qcom_smmu {
 	u32 stall_enabled;
 };
 
+enum qcom_smmu_impl_reg_offset {
+	QCOM_SMMU_TBU_PWR_STATUS,
+	QCOM_SMMU_STATS_SYNC_INV_TBU_ACK,
+	QCOM_SMMU_MMU2QSS_AND_SAFE_WAIT_CNTR,
+};
+
+struct qcom_smmu_config {
+	const u32 *reg_offset;
+};
+
+struct qcom_smmu_match_data {
+	const struct qcom_smmu_config *cfg;
+	const struct arm_smmu_impl *impl;
+	const struct arm_smmu_impl *adreno_impl;
+};
+
 #ifdef CONFIG_ARM_SMMU_QCOM_DEBUG
 void qcom_smmu_tlb_sync_debug(struct arm_smmu_device *smmu);
-const void *qcom_smmu_impl_data(struct arm_smmu_device *smmu);
 #else
 static inline void qcom_smmu_tlb_sync_debug(struct arm_smmu_device *smmu) { }
-static inline const void *qcom_smmu_impl_data(struct arm_smmu_device *smmu)
-{
-	return NULL;
-}
 #endif
 
 #endif /* _ARM_SMMU_QCOM_H */