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path: root/drivers/iommu/arm-smmu-v3.c
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Diffstat (limited to 'drivers/iommu/arm-smmu-v3.c')
-rw-r--r--drivers/iommu/arm-smmu-v3.c87
1 files changed, 42 insertions, 45 deletions
diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c
index da902baaa..286e890e7 100644
--- a/drivers/iommu/arm-smmu-v3.c
+++ b/drivers/iommu/arm-smmu-v3.c
@@ -56,6 +56,7 @@
#define IDR0_TTF_SHIFT 2
#define IDR0_TTF_MASK 0x3
#define IDR0_TTF_AARCH64 (2 << IDR0_TTF_SHIFT)
+#define IDR0_TTF_AARCH32_64 (3 << IDR0_TTF_SHIFT)
#define IDR0_S1P (1 << 1)
#define IDR0_S2P (1 << 0)
@@ -118,6 +119,7 @@
#define ARM_SMMU_IRQ_CTRL 0x50
#define IRQ_CTRL_EVTQ_IRQEN (1 << 2)
+#define IRQ_CTRL_PRIQ_IRQEN (1 << 1)
#define IRQ_CTRL_GERROR_IRQEN (1 << 0)
#define ARM_SMMU_IRQ_CTRLACK 0x54
@@ -173,14 +175,14 @@
#define ARM_SMMU_PRIQ_IRQ_CFG2 0xdc
/* Common MSI config fields */
-#define MSI_CFG0_SH_SHIFT 60
-#define MSI_CFG0_SH_NSH (0UL << MSI_CFG0_SH_SHIFT)
-#define MSI_CFG0_SH_OSH (2UL << MSI_CFG0_SH_SHIFT)
-#define MSI_CFG0_SH_ISH (3UL << MSI_CFG0_SH_SHIFT)
-#define MSI_CFG0_MEMATTR_SHIFT 56
-#define MSI_CFG0_MEMATTR_DEVICE_nGnRE (0x1 << MSI_CFG0_MEMATTR_SHIFT)
#define MSI_CFG0_ADDR_SHIFT 2
#define MSI_CFG0_ADDR_MASK 0x3fffffffffffUL
+#define MSI_CFG2_SH_SHIFT 4
+#define MSI_CFG2_SH_NSH (0UL << MSI_CFG2_SH_SHIFT)
+#define MSI_CFG2_SH_OSH (2UL << MSI_CFG2_SH_SHIFT)
+#define MSI_CFG2_SH_ISH (3UL << MSI_CFG2_SH_SHIFT)
+#define MSI_CFG2_MEMATTR_SHIFT 0
+#define MSI_CFG2_MEMATTR_DEVICE_nGnRE (0x1 << MSI_CFG2_MEMATTR_SHIFT)
#define Q_IDX(q, p) ((p) & ((1 << (q)->max_n_shift) - 1))
#define Q_WRP(q, p) ((p) & (1 << (q)->max_n_shift))
@@ -341,7 +343,8 @@
#define CMDQ_TLBI_0_VMID_SHIFT 32
#define CMDQ_TLBI_0_ASID_SHIFT 48
#define CMDQ_TLBI_1_LEAF (1UL << 0)
-#define CMDQ_TLBI_1_ADDR_MASK ~0xfffUL
+#define CMDQ_TLBI_1_VA_MASK ~0xfffUL
+#define CMDQ_TLBI_1_IPA_MASK 0xfffffffff000UL
#define CMDQ_PRI_0_SSID_SHIFT 12
#define CMDQ_PRI_0_SSID_MASK 0xfffffUL
@@ -769,11 +772,13 @@ static int arm_smmu_cmdq_build_cmd(u64 *cmd, struct arm_smmu_cmdq_ent *ent)
break;
case CMDQ_OP_TLBI_NH_VA:
cmd[0] |= (u64)ent->tlbi.asid << CMDQ_TLBI_0_ASID_SHIFT;
- /* Fallthrough */
+ cmd[1] |= ent->tlbi.leaf ? CMDQ_TLBI_1_LEAF : 0;
+ cmd[1] |= ent->tlbi.addr & CMDQ_TLBI_1_VA_MASK;
+ break;
case CMDQ_OP_TLBI_S2_IPA:
cmd[0] |= (u64)ent->tlbi.vmid << CMDQ_TLBI_0_VMID_SHIFT;
cmd[1] |= ent->tlbi.leaf ? CMDQ_TLBI_1_LEAF : 0;
- cmd[1] |= ent->tlbi.addr & CMDQ_TLBI_1_ADDR_MASK;
+ cmd[1] |= ent->tlbi.addr & CMDQ_TLBI_1_IPA_MASK;
break;
case CMDQ_OP_TLBI_NH_ASID:
cmd[0] |= (u64)ent->tlbi.asid << CMDQ_TLBI_0_ASID_SHIFT;
@@ -1330,33 +1335,10 @@ static void arm_smmu_tlb_inv_range_nosync(unsigned long iova, size_t size,
arm_smmu_cmdq_issue_cmd(smmu, &cmd);
}
-static void arm_smmu_flush_pgtable(void *addr, size_t size, void *cookie)
-{
- struct arm_smmu_domain *smmu_domain = cookie;
- struct arm_smmu_device *smmu = smmu_domain->smmu;
- unsigned long offset = (unsigned long)addr & ~PAGE_MASK;
-
- if (smmu->features & ARM_SMMU_FEAT_COHERENCY) {
- dsb(ishst);
- } else {
- dma_addr_t dma_addr;
- struct device *dev = smmu->dev;
-
- dma_addr = dma_map_page(dev, virt_to_page(addr), offset, size,
- DMA_TO_DEVICE);
-
- if (dma_mapping_error(dev, dma_addr))
- dev_err(dev, "failed to flush pgtable at %p\n", addr);
- else
- dma_unmap_page(dev, dma_addr, size, DMA_TO_DEVICE);
- }
-}
-
static struct iommu_gather_ops arm_smmu_gather_ops = {
.tlb_flush_all = arm_smmu_tlb_inv_context,
.tlb_add_flush = arm_smmu_tlb_inv_range_nosync,
.tlb_sync = arm_smmu_tlb_sync,
- .flush_pgtable = arm_smmu_flush_pgtable,
};
/* IOMMU API */
@@ -1531,6 +1513,7 @@ static int arm_smmu_domain_finalise(struct iommu_domain *domain)
.ias = ias,
.oas = oas,
.tlb = &arm_smmu_gather_ops,
+ .iommu_dev = smmu->dev,
};
pgtbl_ops = alloc_io_pgtable_ops(fmt, &pgtbl_cfg, smmu_domain);
@@ -2053,9 +2036,17 @@ static int arm_smmu_init_strtab_2lvl(struct arm_smmu_device *smmu)
int ret;
struct arm_smmu_strtab_cfg *cfg = &smmu->strtab_cfg;
- /* Calculate the L1 size, capped to the SIDSIZE */
- size = STRTAB_L1_SZ_SHIFT - (ilog2(STRTAB_L1_DESC_DWORDS) + 3);
- size = min(size, smmu->sid_bits - STRTAB_SPLIT);
+ /*
+ * If we can resolve everything with a single L2 table, then we
+ * just need a single L1 descriptor. Otherwise, calculate the L1
+ * size, capped to the SIDSIZE.
+ */
+ if (smmu->sid_bits < STRTAB_SPLIT) {
+ size = 0;
+ } else {
+ size = STRTAB_L1_SZ_SHIFT - (ilog2(STRTAB_L1_DESC_DWORDS) + 3);
+ size = min(size, smmu->sid_bits - STRTAB_SPLIT);
+ }
cfg->num_l1_ents = 1 << size;
size += STRTAB_SPLIT;
@@ -2198,6 +2189,7 @@ static int arm_smmu_write_reg_sync(struct arm_smmu_device *smmu, u32 val,
static int arm_smmu_setup_irqs(struct arm_smmu_device *smmu)
{
int ret, irq;
+ u32 irqen_flags = IRQ_CTRL_EVTQ_IRQEN | IRQ_CTRL_GERROR_IRQEN;
/* Disable IRQs first */
ret = arm_smmu_write_reg_sync(smmu, 0, ARM_SMMU_IRQ_CTRL,
@@ -2252,13 +2244,13 @@ static int arm_smmu_setup_irqs(struct arm_smmu_device *smmu)
if (IS_ERR_VALUE(ret))
dev_warn(smmu->dev,
"failed to enable priq irq\n");
+ else
+ irqen_flags |= IRQ_CTRL_PRIQ_IRQEN;
}
}
/* Enable interrupt generation on the SMMU */
- ret = arm_smmu_write_reg_sync(smmu,
- IRQ_CTRL_EVTQ_IRQEN |
- IRQ_CTRL_GERROR_IRQEN,
+ ret = arm_smmu_write_reg_sync(smmu, irqen_flags,
ARM_SMMU_IRQ_CTRL, ARM_SMMU_IRQ_CTRLACK);
if (ret)
dev_warn(smmu->dev, "failed to enable irqs\n");
@@ -2472,7 +2464,13 @@ static int arm_smmu_device_probe(struct arm_smmu_device *smmu)
}
/* We only support the AArch64 table format at present */
- if ((reg & IDR0_TTF_MASK << IDR0_TTF_SHIFT) < IDR0_TTF_AARCH64) {
+ switch (reg & IDR0_TTF_MASK << IDR0_TTF_SHIFT) {
+ case IDR0_TTF_AARCH32_64:
+ smmu->ias = 40;
+ /* Fallthrough */
+ case IDR0_TTF_AARCH64:
+ break;
+ default:
dev_err(smmu->dev, "AArch64 table format not supported!\n");
return -ENXIO;
}
@@ -2540,12 +2538,12 @@ static int arm_smmu_device_probe(struct arm_smmu_device *smmu)
case IDR5_OAS_44_BIT:
smmu->oas = 44;
break;
+ default:
+ dev_info(smmu->dev,
+ "unknown output address size. Truncating to 48-bit\n");
+ /* Fallthrough */
case IDR5_OAS_48_BIT:
smmu->oas = 48;
- break;
- default:
- dev_err(smmu->dev, "unknown output address size!\n");
- return -ENXIO;
}
/* Set the DMA mask for our table walker */
@@ -2553,8 +2551,7 @@ static int arm_smmu_device_probe(struct arm_smmu_device *smmu)
dev_warn(smmu->dev,
"failed to set DMA mask for table walker\n");
- if (!smmu->ias)
- smmu->ias = smmu->oas;
+ smmu->ias = max(smmu->ias, smmu->oas);
dev_info(smmu->dev, "ias %lu-bit, oas %lu-bit (features 0x%08x)\n",
smmu->ias, smmu->oas, smmu->features);
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-01 20:23:26 +0000