iommu/arm-smmu: Add context init implementation hook

Allocating and initialising a context for a domain is another point
where certain implementations are known to want special behaviour.
Currently the other half of the Cavium workaround comes into play here,
so let's finish the job to get the whole thing right out of the way.

Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Will Deacon <will@kernel.org>

1 files changed, 9 insertions, 42 deletions

diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index fc98992d120d..b8628e2ab579 100644
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c
@@ -27,7 +27,6 @@
 #include <linux/interrupt.h>
 #include <linux/io.h>
 #include <linux/io-64-nonatomic-hi-lo.h>
-#include <linux/io-pgtable.h>
 #include <linux/iopoll.h>
 #include <linux/init.h>
 #include <linux/moduleparam.h>
@@ -111,44 +110,6 @@ struct arm_smmu_master_cfg {
 #define for_each_cfg_sme(fw, i, idx) \
 	for (i = 0; idx = fwspec_smendx(fw, i), i < fw->num_ids; ++i)
 
-enum arm_smmu_context_fmt {
-	ARM_SMMU_CTX_FMT_NONE,
-	ARM_SMMU_CTX_FMT_AARCH64,
-	ARM_SMMU_CTX_FMT_AARCH32_L,
-	ARM_SMMU_CTX_FMT_AARCH32_S,
-};
-
-struct arm_smmu_cfg {
-	u8				cbndx;
-	u8				irptndx;
-	union {
-		u16			asid;
-		u16			vmid;
-	};
-	enum arm_smmu_cbar_type		cbar;
-	enum arm_smmu_context_fmt	fmt;
-};
-#define INVALID_IRPTNDX			0xff
-
-enum arm_smmu_domain_stage {
-	ARM_SMMU_DOMAIN_S1 = 0,
-	ARM_SMMU_DOMAIN_S2,
-	ARM_SMMU_DOMAIN_NESTED,
-	ARM_SMMU_DOMAIN_BYPASS,
-};
-
-struct arm_smmu_domain {
-	struct arm_smmu_device		*smmu;
-	struct io_pgtable_ops		*pgtbl_ops;
-	const struct iommu_gather_ops	*tlb_ops;
-	struct arm_smmu_cfg		cfg;
-	enum arm_smmu_domain_stage	stage;
-	bool				non_strict;
-	struct mutex			init_mutex; /* Protects smmu pointer */
-	spinlock_t			cb_lock; /* Serialises ATS1* ops and TLB syncs */
-	struct iommu_domain		domain;
-};
-
 static bool using_legacy_binding, using_generic_binding;
 
 static inline int arm_smmu_rpm_get(struct arm_smmu_device *smmu)
@@ -749,9 +710,16 @@ static int arm_smmu_init_domain_context(struct iommu_domain *domain,
 	}
 
 	if (smmu_domain->stage == ARM_SMMU_DOMAIN_S2)
-		cfg->vmid = cfg->cbndx + 1 + smmu->cavium_id_base;
+		cfg->vmid = cfg->cbndx + 1;
 	else
-		cfg->asid = cfg->cbndx + smmu->cavium_id_base;
+		cfg->asid = cfg->cbndx;
+
+	smmu_domain->smmu = smmu;
+	if (smmu->impl && smmu->impl->init_context) {
+		ret = smmu->impl->init_context(smmu_domain);
+		if (ret)
+			goto out_unlock;
+	}
 
 	pgtbl_cfg = (struct io_pgtable_cfg) {
 		.pgsize_bitmap	= smmu->pgsize_bitmap,
@@ -765,7 +733,6 @@ static int arm_smmu_init_domain_context(struct iommu_domain *domain,
 	if (smmu_domain->non_strict)
 		pgtbl_cfg.quirks |= IO_PGTABLE_QUIRK_NON_STRICT;
 
-	smmu_domain->smmu = smmu;
 	pgtbl_ops = alloc_io_pgtable_ops(fmt, &pgtbl_cfg, smmu_domain);
 	if (!pgtbl_ops) {
 		ret = -ENOMEM;