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path: root/drivers/iommu/arm-smmu.c
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Diffstat (limited to 'drivers/iommu/arm-smmu.c')
-rw-r--r--drivers/iommu/arm-smmu.c105
1 files changed, 71 insertions, 34 deletions
diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index 1d9ab39af29f..8b89e33a89fe 100644
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c
@@ -48,7 +48,7 @@
#include <asm/pgalloc.h>
/* Maximum number of stream IDs assigned to a single device */
-#define MAX_MASTER_STREAMIDS 8
+#define MAX_MASTER_STREAMIDS MAX_PHANDLE_ARGS
/* Maximum number of context banks per SMMU */
#define ARM_SMMU_MAX_CBS 128
@@ -60,6 +60,16 @@
#define ARM_SMMU_GR0(smmu) ((smmu)->base)
#define ARM_SMMU_GR1(smmu) ((smmu)->base + (smmu)->pagesize)
+/*
+ * SMMU global address space with conditional offset to access secure
+ * aliases of non-secure registers (e.g. nsCR0: 0x400, nsGFSR: 0x448,
+ * nsGFSYNR0: 0x450)
+ */
+#define ARM_SMMU_GR0_NS(smmu) \
+ ((smmu)->base + \
+ ((smmu->options & ARM_SMMU_OPT_SECURE_CFG_ACCESS) \
+ ? 0x400 : 0))
+
/* Page table bits */
#define ARM_SMMU_PTE_XN (((pteval_t)3) << 53)
#define ARM_SMMU_PTE_CONT (((pteval_t)1) << 52)
@@ -351,6 +361,9 @@ struct arm_smmu_device {
#define ARM_SMMU_FEAT_TRANS_S2 (1 << 3)
#define ARM_SMMU_FEAT_TRANS_NESTED (1 << 4)
u32 features;
+
+#define ARM_SMMU_OPT_SECURE_CFG_ACCESS (1 << 0)
+ u32 options;
int version;
u32 num_context_banks;
@@ -401,6 +414,29 @@ struct arm_smmu_domain {
static DEFINE_SPINLOCK(arm_smmu_devices_lock);
static LIST_HEAD(arm_smmu_devices);
+struct arm_smmu_option_prop {
+ u32 opt;
+ const char *prop;
+};
+
+static struct arm_smmu_option_prop arm_smmu_options [] = {
+ { ARM_SMMU_OPT_SECURE_CFG_ACCESS, "calxeda,smmu-secure-config-access" },
+ { 0, NULL},
+};
+
+static void parse_driver_options(struct arm_smmu_device *smmu)
+{
+ int i = 0;
+ do {
+ if (of_property_read_bool(smmu->dev->of_node,
+ arm_smmu_options[i].prop)) {
+ smmu->options |= arm_smmu_options[i].opt;
+ dev_notice(smmu->dev, "option %s\n",
+ arm_smmu_options[i].prop);
+ }
+ } while (arm_smmu_options[++i].opt);
+}
+
static struct arm_smmu_master *find_smmu_master(struct arm_smmu_device *smmu,
struct device_node *dev_node)
{
@@ -614,16 +650,16 @@ static irqreturn_t arm_smmu_global_fault(int irq, void *dev)
{
u32 gfsr, gfsynr0, gfsynr1, gfsynr2;
struct arm_smmu_device *smmu = dev;
- void __iomem *gr0_base = ARM_SMMU_GR0(smmu);
+ void __iomem *gr0_base = ARM_SMMU_GR0_NS(smmu);
gfsr = readl_relaxed(gr0_base + ARM_SMMU_GR0_sGFSR);
- if (!gfsr)
- return IRQ_NONE;
-
gfsynr0 = readl_relaxed(gr0_base + ARM_SMMU_GR0_sGFSYNR0);
gfsynr1 = readl_relaxed(gr0_base + ARM_SMMU_GR0_sGFSYNR1);
gfsynr2 = readl_relaxed(gr0_base + ARM_SMMU_GR0_sGFSYNR2);
+ if (!gfsr)
+ return IRQ_NONE;
+
dev_err_ratelimited(smmu->dev,
"Unexpected global fault, this could be serious\n");
dev_err_ratelimited(smmu->dev,
@@ -642,7 +678,7 @@ static void arm_smmu_flush_pgtable(struct arm_smmu_device *smmu, void *addr,
/* Ensure new page tables are visible to the hardware walker */
if (smmu->features & ARM_SMMU_FEAT_COHERENT_WALK) {
- dsb();
+ dsb(ishst);
} else {
/*
* If the SMMU can't walk tables in the CPU caches, treat them
@@ -990,9 +1026,8 @@ static void arm_smmu_free_pgtables(struct arm_smmu_domain *smmu_domain)
/*
* Recursively free the page tables for this domain. We don't
- * care about speculative TLB filling, because the TLB will be
- * nuked next time this context bank is re-allocated and no devices
- * currently map to these tables.
+ * care about speculative TLB filling because the tables should
+ * not be active in any context bank at this point (SCTLR.M is 0).
*/
pgd = pgd_base;
for (i = 0; i < PTRS_PER_PGD; ++i) {
@@ -1218,7 +1253,7 @@ static bool arm_smmu_pte_is_contiguous_range(unsigned long addr,
static int arm_smmu_alloc_init_pte(struct arm_smmu_device *smmu, pmd_t *pmd,
unsigned long addr, unsigned long end,
- unsigned long pfn, int flags, int stage)
+ unsigned long pfn, int prot, int stage)
{
pte_t *pte, *start;
pteval_t pteval = ARM_SMMU_PTE_PAGE | ARM_SMMU_PTE_AF | ARM_SMMU_PTE_XN;
@@ -1240,28 +1275,28 @@ static int arm_smmu_alloc_init_pte(struct arm_smmu_device *smmu, pmd_t *pmd,
if (stage == 1) {
pteval |= ARM_SMMU_PTE_AP_UNPRIV | ARM_SMMU_PTE_nG;
- if (!(flags & IOMMU_WRITE) && (flags & IOMMU_READ))
+ if (!(prot & IOMMU_WRITE) && (prot & IOMMU_READ))
pteval |= ARM_SMMU_PTE_AP_RDONLY;
- if (flags & IOMMU_CACHE)
+ if (prot & IOMMU_CACHE)
pteval |= (MAIR_ATTR_IDX_CACHE <<
ARM_SMMU_PTE_ATTRINDX_SHIFT);
} else {
pteval |= ARM_SMMU_PTE_HAP_FAULT;
- if (flags & IOMMU_READ)
+ if (prot & IOMMU_READ)
pteval |= ARM_SMMU_PTE_HAP_READ;
- if (flags & IOMMU_WRITE)
+ if (prot & IOMMU_WRITE)
pteval |= ARM_SMMU_PTE_HAP_WRITE;
- if (flags & IOMMU_CACHE)
+ if (prot & IOMMU_CACHE)
pteval |= ARM_SMMU_PTE_MEMATTR_OIWB;
else
pteval |= ARM_SMMU_PTE_MEMATTR_NC;
}
/* If no access, create a faulting entry to avoid TLB fills */
- if (flags & IOMMU_EXEC)
+ if (prot & IOMMU_EXEC)
pteval &= ~ARM_SMMU_PTE_XN;
- else if (!(flags & (IOMMU_READ | IOMMU_WRITE)))
+ else if (!(prot & (IOMMU_READ | IOMMU_WRITE)))
pteval &= ~ARM_SMMU_PTE_PAGE;
pteval |= ARM_SMMU_PTE_SH_IS;
@@ -1323,7 +1358,7 @@ static int arm_smmu_alloc_init_pte(struct arm_smmu_device *smmu, pmd_t *pmd,
static int arm_smmu_alloc_init_pmd(struct arm_smmu_device *smmu, pud_t *pud,
unsigned long addr, unsigned long end,
- phys_addr_t phys, int flags, int stage)
+ phys_addr_t phys, int prot, int stage)
{
int ret;
pmd_t *pmd;
@@ -1347,7 +1382,7 @@ static int arm_smmu_alloc_init_pmd(struct arm_smmu_device *smmu, pud_t *pud,
do {
next = pmd_addr_end(addr, end);
ret = arm_smmu_alloc_init_pte(smmu, pmd, addr, end, pfn,
- flags, stage);
+ prot, stage);
phys += next - addr;
} while (pmd++, addr = next, addr < end);
@@ -1356,7 +1391,7 @@ static int arm_smmu_alloc_init_pmd(struct arm_smmu_device *smmu, pud_t *pud,
static int arm_smmu_alloc_init_pud(struct arm_smmu_device *smmu, pgd_t *pgd,
unsigned long addr, unsigned long end,
- phys_addr_t phys, int flags, int stage)
+ phys_addr_t phys, int prot, int stage)
{
int ret = 0;
pud_t *pud;
@@ -1380,7 +1415,7 @@ static int arm_smmu_alloc_init_pud(struct arm_smmu_device *smmu, pgd_t *pgd,
do {
next = pud_addr_end(addr, end);
ret = arm_smmu_alloc_init_pmd(smmu, pud, addr, next, phys,
- flags, stage);
+ prot, stage);
phys += next - addr;
} while (pud++, addr = next, addr < end);
@@ -1389,7 +1424,7 @@ static int arm_smmu_alloc_init_pud(struct arm_smmu_device *smmu, pgd_t *pgd,
static int arm_smmu_handle_mapping(struct arm_smmu_domain *smmu_domain,
unsigned long iova, phys_addr_t paddr,
- size_t size, int flags)
+ size_t size, int prot)
{
int ret, stage;
unsigned long end;
@@ -1397,7 +1432,7 @@ static int arm_smmu_handle_mapping(struct arm_smmu_domain *smmu_domain,
struct arm_smmu_cfg *root_cfg = &smmu_domain->root_cfg;
pgd_t *pgd = root_cfg->pgd;
struct arm_smmu_device *smmu = root_cfg->smmu;
- unsigned long irqflags;
+ unsigned long flags;
if (root_cfg->cbar == CBAR_TYPE_S2_TRANS) {
stage = 2;
@@ -1420,14 +1455,14 @@ static int arm_smmu_handle_mapping(struct arm_smmu_domain *smmu_domain,
if (paddr & ~output_mask)
return -ERANGE;
- spin_lock_irqsave(&smmu_domain->lock, irqflags);
+ spin_lock_irqsave(&smmu_domain->lock, flags);
pgd += pgd_index(iova);
end = iova + size;
do {
unsigned long next = pgd_addr_end(iova, end);
ret = arm_smmu_alloc_init_pud(smmu, pgd, iova, next, paddr,
- flags, stage);
+ prot, stage);
if (ret)
goto out_unlock;
@@ -1436,13 +1471,13 @@ static int arm_smmu_handle_mapping(struct arm_smmu_domain *smmu_domain,
} while (pgd++, iova != end);
out_unlock:
- spin_unlock_irqrestore(&smmu_domain->lock, irqflags);
+ spin_unlock_irqrestore(&smmu_domain->lock, flags);
return ret;
}
static int arm_smmu_map(struct iommu_domain *domain, unsigned long iova,
- phys_addr_t paddr, size_t size, int flags)
+ phys_addr_t paddr, size_t size, int prot)
{
struct arm_smmu_domain *smmu_domain = domain->priv;
@@ -1453,7 +1488,7 @@ static int arm_smmu_map(struct iommu_domain *domain, unsigned long iova,
if ((phys_addr_t)iova & ~smmu_domain->output_mask)
return -ERANGE;
- return arm_smmu_handle_mapping(smmu_domain, iova, paddr, size, flags);
+ return arm_smmu_handle_mapping(smmu_domain, iova, paddr, size, prot);
}
static size_t arm_smmu_unmap(struct iommu_domain *domain, unsigned long iova,
@@ -1597,9 +1632,9 @@ static void arm_smmu_device_reset(struct arm_smmu_device *smmu)
int i = 0;
u32 reg;
- /* Clear Global FSR */
- reg = readl_relaxed(gr0_base + ARM_SMMU_GR0_sGFSR);
- writel(reg, gr0_base + ARM_SMMU_GR0_sGFSR);
+ /* clear global FSR */
+ reg = readl_relaxed(ARM_SMMU_GR0_NS(smmu) + ARM_SMMU_GR0_sGFSR);
+ writel(reg, ARM_SMMU_GR0_NS(smmu) + ARM_SMMU_GR0_sGFSR);
/* Mark all SMRn as invalid and all S2CRn as bypass */
for (i = 0; i < smmu->num_mapping_groups; ++i) {
@@ -1619,7 +1654,7 @@ static void arm_smmu_device_reset(struct arm_smmu_device *smmu)
writel_relaxed(0, gr0_base + ARM_SMMU_GR0_TLBIALLH);
writel_relaxed(0, gr0_base + ARM_SMMU_GR0_TLBIALLNSNH);
- reg = readl_relaxed(gr0_base + ARM_SMMU_GR0_sCR0);
+ reg = readl_relaxed(ARM_SMMU_GR0_NS(smmu) + ARM_SMMU_GR0_sCR0);
/* Enable fault reporting */
reg |= (sCR0_GFRE | sCR0_GFIE | sCR0_GCFGFRE | sCR0_GCFGFIE);
@@ -1638,7 +1673,7 @@ static void arm_smmu_device_reset(struct arm_smmu_device *smmu)
/* Push the button */
arm_smmu_tlb_sync(smmu);
- writel_relaxed(reg, gr0_base + ARM_SMMU_GR0_sCR0);
+ writel(reg, ARM_SMMU_GR0_NS(smmu) + ARM_SMMU_GR0_sCR0);
}
static int arm_smmu_id_size_to_bits(int size)
@@ -1885,6 +1920,8 @@ static int arm_smmu_device_dt_probe(struct platform_device *pdev)
if (err)
goto out_put_parent;
+ parse_driver_options(smmu);
+
if (smmu->version > 1 &&
smmu->num_context_banks != smmu->num_context_irqs) {
dev_err(dev,
@@ -1969,7 +2006,7 @@ static int arm_smmu_device_remove(struct platform_device *pdev)
free_irq(smmu->irqs[i], smmu);
/* Turn the thing off */
- writel_relaxed(sCR0_CLIENTPD, ARM_SMMU_GR0(smmu) + ARM_SMMU_GR0_sCR0);
+ writel(sCR0_CLIENTPD,ARM_SMMU_GR0_NS(smmu) + ARM_SMMU_GR0_sCR0);
return 0;
}
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-08 02:29:32 +0300