[PATCH 4/4] iommu/arm-smmu: make use of generic LPAE allocator
Will Deacon
will.deacon at arm.com
Thu Nov 27 03:51:18 PST 2014
The ARM SMMU can walk LPAE page tables, so make use of the generic
allocator.
Signed-off-by: Will Deacon <will.deacon at arm.com>
---
arch/arm64/Kconfig | 1 -
drivers/iommu/Kconfig | 6 +-
drivers/iommu/arm-smmu.c | 872 ++++++++++++++---------------------------------
3 files changed, 252 insertions(+), 627 deletions(-)
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 9532f8d5857e..d2adb09c8f04 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -233,7 +233,6 @@ config ARM64_VA_BITS_42
config ARM64_VA_BITS_48
bool "48-bit"
- depends on !ARM_SMMU
endchoice
diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig
index dde72d0990b0..7e1bc3262663 100644
--- a/drivers/iommu/Kconfig
+++ b/drivers/iommu/Kconfig
@@ -317,13 +317,13 @@ config SPAPR_TCE_IOMMU
config ARM_SMMU
bool "ARM Ltd. System MMU (SMMU) Support"
- depends on ARM64 || (ARM_LPAE && OF)
+ depends on ARM64 || ARM
select IOMMU_API
+ select IOMMU_IO_PGTABLE_LPAE
select ARM_DMA_USE_IOMMU if ARM
help
Support for implementations of the ARM System MMU architecture
- versions 1 and 2. The driver supports both v7l and v8l table
- formats with 4k and 64k page sizes.
+ versions 1 and 2.
Say Y here if your SoC includes an IOMMU device implementing
the ARM SMMU architecture.
diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index 7a80f710ba2d..f9cfac2d8ae9 100644
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c
@@ -23,8 +23,6 @@
* - Stream-matching and stream-indexing
* - v7/v8 long-descriptor format
* - Non-secure access to the SMMU
- * - 4k and 64k pages, with contiguous pte hints.
- * - Up to 48-bit addressing (dependent on VA_BITS)
* - Context fault reporting
*/
@@ -36,7 +34,6 @@
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/iommu.h>
-#include <linux/mm.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/pci.h>
@@ -46,7 +43,7 @@
#include <linux/amba/bus.h>
-#include <asm/pgalloc.h>
+#include "io-pgtable.h"
/* Maximum number of stream IDs assigned to a single device */
#define MAX_MASTER_STREAMIDS MAX_PHANDLE_ARGS
@@ -71,40 +68,6 @@
((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)
-#define ARM_SMMU_PTE_AF (((pteval_t)1) << 10)
-#define ARM_SMMU_PTE_SH_NS (((pteval_t)0) << 8)
-#define ARM_SMMU_PTE_SH_OS (((pteval_t)2) << 8)
-#define ARM_SMMU_PTE_SH_IS (((pteval_t)3) << 8)
-#define ARM_SMMU_PTE_PAGE (((pteval_t)3) << 0)
-
-#if PAGE_SIZE == SZ_4K
-#define ARM_SMMU_PTE_CONT_ENTRIES 16
-#elif PAGE_SIZE == SZ_64K
-#define ARM_SMMU_PTE_CONT_ENTRIES 32
-#else
-#define ARM_SMMU_PTE_CONT_ENTRIES 1
-#endif
-
-#define ARM_SMMU_PTE_CONT_SIZE (PAGE_SIZE * ARM_SMMU_PTE_CONT_ENTRIES)
-#define ARM_SMMU_PTE_CONT_MASK (~(ARM_SMMU_PTE_CONT_SIZE - 1))
-
-/* Stage-1 PTE */
-#define ARM_SMMU_PTE_AP_UNPRIV (((pteval_t)1) << 6)
-#define ARM_SMMU_PTE_AP_RDONLY (((pteval_t)2) << 6)
-#define ARM_SMMU_PTE_ATTRINDX_SHIFT 2
-#define ARM_SMMU_PTE_nG (((pteval_t)1) << 11)
-
-/* Stage-2 PTE */
-#define ARM_SMMU_PTE_HAP_FAULT (((pteval_t)0) << 6)
-#define ARM_SMMU_PTE_HAP_READ (((pteval_t)1) << 6)
-#define ARM_SMMU_PTE_HAP_WRITE (((pteval_t)2) << 6)
-#define ARM_SMMU_PTE_MEMATTR_OIWB (((pteval_t)0xf) << 2)
-#define ARM_SMMU_PTE_MEMATTR_NC (((pteval_t)0x5) << 2)
-#define ARM_SMMU_PTE_MEMATTR_DEV (((pteval_t)0x1) << 2)
-
/* Configuration registers */
#define ARM_SMMU_GR0_sCR0 0x0
#define sCR0_CLIENTPD (1 << 0)
@@ -132,17 +95,11 @@
#define ARM_SMMU_GR0_sGFSYNR0 0x50
#define ARM_SMMU_GR0_sGFSYNR1 0x54
#define ARM_SMMU_GR0_sGFSYNR2 0x58
-#define ARM_SMMU_GR0_PIDR0 0xfe0
-#define ARM_SMMU_GR0_PIDR1 0xfe4
-#define ARM_SMMU_GR0_PIDR2 0xfe8
#define ID0_S1TS (1 << 30)
#define ID0_S2TS (1 << 29)
#define ID0_NTS (1 << 28)
#define ID0_SMS (1 << 27)
-#define ID0_PTFS_SHIFT 24
-#define ID0_PTFS_MASK 0x2
-#define ID0_PTFS_V8_ONLY 0x2
#define ID0_CTTW (1 << 14)
#define ID0_NUMIRPT_SHIFT 16
#define ID0_NUMIRPT_MASK 0xff
@@ -169,9 +126,6 @@
#define ID2_PTFS_16K (1 << 13)
#define ID2_PTFS_64K (1 << 14)
-#define PIDR2_ARCH_SHIFT 4
-#define PIDR2_ARCH_MASK 0xf
-
/* Global TLB invalidation */
#define ARM_SMMU_GR0_STLBIALL 0x60
#define ARM_SMMU_GR0_TLBIVMID 0x64
@@ -231,13 +185,18 @@
#define ARM_SMMU_CB_TTBCR2 0x10
#define ARM_SMMU_CB_TTBR0_LO 0x20
#define ARM_SMMU_CB_TTBR0_HI 0x24
+#define ARM_SMMU_CB_TTBR1_LO 0x28
+#define ARM_SMMU_CB_TTBR1_HI 0x2c
#define ARM_SMMU_CB_TTBCR 0x30
#define ARM_SMMU_CB_S1_MAIR0 0x38
+#define ARM_SMMU_CB_S1_MAIR1 0x3c
#define ARM_SMMU_CB_FSR 0x58
#define ARM_SMMU_CB_FAR_LO 0x60
#define ARM_SMMU_CB_FAR_HI 0x64
#define ARM_SMMU_CB_FSYNR0 0x68
+#define ARM_SMMU_CB_S1_TLBIVA 0x600
#define ARM_SMMU_CB_S1_TLBIASID 0x610
+#define ARM_SMMU_CB_S1_TLBIVAL 0x620
#define SCTLR_S1_ASIDPNE (1 << 12)
#define SCTLR_CFCFG (1 << 7)
@@ -252,44 +211,9 @@
#define RESUME_RETRY (0 << 0)
#define RESUME_TERMINATE (1 << 0)
-#define TTBCR_EAE (1 << 31)
-
-#define TTBCR_PASIZE_SHIFT 16
-#define TTBCR_PASIZE_MASK 0x7
-
-#define TTBCR_TG0_4K (0 << 14)
-#define TTBCR_TG0_64K (1 << 14)
-
-#define TTBCR_SH0_SHIFT 12
-#define TTBCR_SH0_MASK 0x3
-#define TTBCR_SH_NS 0
-#define TTBCR_SH_OS 2
-#define TTBCR_SH_IS 3
-
-#define TTBCR_ORGN0_SHIFT 10
-#define TTBCR_IRGN0_SHIFT 8
-#define TTBCR_RGN_MASK 0x3
-#define TTBCR_RGN_NC 0
-#define TTBCR_RGN_WBWA 1
-#define TTBCR_RGN_WT 2
-#define TTBCR_RGN_WB 3
-
-#define TTBCR_SL0_SHIFT 6
-#define TTBCR_SL0_MASK 0x3
-#define TTBCR_SL0_LVL_2 0
-#define TTBCR_SL0_LVL_1 1
-
-#define TTBCR_T1SZ_SHIFT 16
-#define TTBCR_T0SZ_SHIFT 0
-#define TTBCR_SZ_MASK 0xf
-
#define TTBCR2_SEP_SHIFT 15
#define TTBCR2_SEP_MASK 0x7
-#define TTBCR2_PASIZE_SHIFT 0
-#define TTBCR2_PASIZE_MASK 0x7
-
-/* Common definitions for PASize and SEP fields */
#define TTBCR2_ADDR_32 0
#define TTBCR2_ADDR_36 1
#define TTBCR2_ADDR_40 2
@@ -297,16 +221,7 @@
#define TTBCR2_ADDR_44 4
#define TTBCR2_ADDR_48 5
-#define TTBRn_HI_ASID_SHIFT 16
-
-#define MAIR_ATTR_SHIFT(n) ((n) << 3)
-#define MAIR_ATTR_MASK 0xff
-#define MAIR_ATTR_DEVICE 0x04
-#define MAIR_ATTR_NC 0x44
-#define MAIR_ATTR_WBRWA 0xff
-#define MAIR_ATTR_IDX_NC 0
-#define MAIR_ATTR_IDX_CACHE 1
-#define MAIR_ATTR_IDX_DEV 2
+#define TTBRn_HI_ASID_SHIFT 16
#define FSR_MULTI (1 << 31)
#define FSR_SS (1 << 30)
@@ -380,10 +295,9 @@ struct arm_smmu_device {
u32 num_mapping_groups;
DECLARE_BITMAP(smr_map, ARM_SMMU_MAX_SMRS);
- unsigned long s1_input_size;
- unsigned long s1_output_size;
- unsigned long s2_input_size;
- unsigned long s2_output_size;
+ unsigned long va_size;
+ unsigned long ipa_size;
+ unsigned long pa_size;
u32 num_global_irqs;
u32 num_context_irqs;
@@ -397,7 +311,6 @@ struct arm_smmu_cfg {
u8 cbndx;
u8 irptndx;
u32 cbar;
- pgd_t *pgd;
};
#define INVALID_IRPTNDX 0xff
@@ -412,11 +325,15 @@ enum arm_smmu_domain_stage {
struct arm_smmu_domain {
struct arm_smmu_device *smmu;
+ struct io_pgtable_ops *pgtbl_ops;
+ spinlock_t pgtbl_lock;
struct arm_smmu_cfg cfg;
enum arm_smmu_domain_stage stage;
- spinlock_t lock;
+ struct mutex init_mutex; /* Protects smmu pointer */
};
+static struct iommu_ops arm_smmu_ops;
+
static DEFINE_SPINLOCK(arm_smmu_devices_lock);
static LIST_HEAD(arm_smmu_devices);
@@ -597,7 +514,7 @@ static void __arm_smmu_free_bitmap(unsigned long *map, int idx)
}
/* Wait for any pending TLB invalidations to complete */
-static void arm_smmu_tlb_sync(struct arm_smmu_device *smmu)
+static void __arm_smmu_tlb_sync(struct arm_smmu_device *smmu)
{
int count = 0;
void __iomem *gr0_base = ARM_SMMU_GR0(smmu);
@@ -615,12 +532,19 @@ static void arm_smmu_tlb_sync(struct arm_smmu_device *smmu)
}
}
-static void arm_smmu_tlb_inv_context(struct arm_smmu_domain *smmu_domain)
+static void arm_smmu_tlb_sync(void *cookie)
+{
+ struct arm_smmu_domain *smmu_domain = cookie;
+ __arm_smmu_tlb_sync(smmu_domain->smmu);
+}
+
+static void arm_smmu_tlb_inv_context(void *cookie)
{
+ struct arm_smmu_domain *smmu_domain = cookie;
struct arm_smmu_cfg *cfg = &smmu_domain->cfg;
struct arm_smmu_device *smmu = smmu_domain->smmu;
- void __iomem *base = ARM_SMMU_GR0(smmu);
bool stage1 = cfg->cbar != CBAR_TYPE_S2_TRANS;
+ void __iomem *base;
if (stage1) {
base = ARM_SMMU_CB_BASE(smmu) + ARM_SMMU_CB(smmu, cfg->cbndx);
@@ -632,9 +556,70 @@ static void arm_smmu_tlb_inv_context(struct arm_smmu_domain *smmu_domain)
base + ARM_SMMU_GR0_TLBIVMID);
}
- arm_smmu_tlb_sync(smmu);
+ __arm_smmu_tlb_sync(smmu);
+}
+
+static void arm_smmu_tlb_inv_range_nosync(unsigned long iova, size_t size,
+ bool leaf, void *cookie)
+{
+ struct arm_smmu_domain *smmu_domain = cookie;
+ struct arm_smmu_cfg *cfg = &smmu_domain->cfg;
+ struct arm_smmu_device *smmu = smmu_domain->smmu;
+ bool stage1 = cfg->cbar != CBAR_TYPE_S2_TRANS;
+ void __iomem *reg;
+
+ if (stage1) {
+ reg = ARM_SMMU_CB_BASE(smmu) + ARM_SMMU_CB(smmu, cfg->cbndx);
+ reg += leaf ? ARM_SMMU_CB_S1_TLBIVAL : ARM_SMMU_CB_S1_TLBIVA;
+
+ if (!IS_ENABLED(CONFIG_64BIT) || smmu->version == ARM_SMMU_V1) {
+ iova &= ~12UL;
+ iova |= ARM_SMMU_CB_ASID(cfg);
+ writel_relaxed(iova, reg);
+#ifdef CONFIG_64BIT
+ } else {
+ iova >>= 12;
+ iova |= (u64)ARM_SMMU_CB_ASID(cfg) << 48;
+ writeq_relaxed(iova, reg);
+#endif
+ }
+ } else {
+ /* Invalidate by IPA is optional */
+ reg = ARM_SMMU_GR0(smmu) + ARM_SMMU_GR0_TLBIVMID;
+ writel_relaxed(ARM_SMMU_CB_VMID(cfg), reg);
+ }
}
+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;
+
+
+ /* Ensure new page tables are visible to the hardware walker */
+ if (smmu->features & ARM_SMMU_FEAT_COHERENT_WALK) {
+ dsb(ishst);
+ } else {
+ /*
+ * If the SMMU can't walk tables in the CPU caches, treat them
+ * like non-coherent DMA since we need to flush the new entries
+ * all the way out to memory. There's no possibility of
+ * recursion here as the SMMU table walker will not be wired
+ * through another SMMU.
+ */
+ dma_map_page(smmu->dev, virt_to_page(addr), offset, 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,
+};
+
static irqreturn_t arm_smmu_context_fault(int irq, void *dev)
{
int flags, ret;
@@ -712,29 +697,8 @@ static irqreturn_t arm_smmu_global_fault(int irq, void *dev)
return IRQ_HANDLED;
}
-static void arm_smmu_flush_pgtable(struct arm_smmu_device *smmu, void *addr,
- size_t size)
-{
- unsigned long offset = (unsigned long)addr & ~PAGE_MASK;
-
-
- /* Ensure new page tables are visible to the hardware walker */
- if (smmu->features & ARM_SMMU_FEAT_COHERENT_WALK) {
- dsb(ishst);
- } else {
- /*
- * If the SMMU can't walk tables in the CPU caches, treat them
- * like non-coherent DMA since we need to flush the new entries
- * all the way out to memory. There's no possibility of
- * recursion here as the SMMU table walker will not be wired
- * through another SMMU.
- */
- dma_map_page(smmu->dev, virt_to_page(addr), offset, size,
- DMA_TO_DEVICE);
- }
-}
-
-static void arm_smmu_init_context_bank(struct arm_smmu_domain *smmu_domain)
+static void arm_smmu_init_context_bank(struct arm_smmu_domain *smmu_domain,
+ struct io_pgtable_cfg *pgtbl_cfg)
{
u32 reg;
bool stage1;
@@ -771,124 +735,68 @@ static void arm_smmu_init_context_bank(struct arm_smmu_domain *smmu_domain)
#else
reg = CBA2R_RW64_32BIT;
#endif
- writel_relaxed(reg,
- gr1_base + ARM_SMMU_GR1_CBA2R(cfg->cbndx));
-
- /* TTBCR2 */
- switch (smmu->s1_input_size) {
- case 32:
- reg = (TTBCR2_ADDR_32 << TTBCR2_SEP_SHIFT);
- break;
- case 36:
- reg = (TTBCR2_ADDR_36 << TTBCR2_SEP_SHIFT);
- break;
- case 39:
- case 40:
- reg = (TTBCR2_ADDR_40 << TTBCR2_SEP_SHIFT);
- break;
- case 42:
- reg = (TTBCR2_ADDR_42 << TTBCR2_SEP_SHIFT);
- break;
- case 44:
- reg = (TTBCR2_ADDR_44 << TTBCR2_SEP_SHIFT);
- break;
- case 48:
- reg = (TTBCR2_ADDR_48 << TTBCR2_SEP_SHIFT);
- break;
- }
-
- switch (smmu->s1_output_size) {
- case 32:
- reg |= (TTBCR2_ADDR_32 << TTBCR2_PASIZE_SHIFT);
- break;
- case 36:
- reg |= (TTBCR2_ADDR_36 << TTBCR2_PASIZE_SHIFT);
- break;
- case 39:
- case 40:
- reg |= (TTBCR2_ADDR_40 << TTBCR2_PASIZE_SHIFT);
- break;
- case 42:
- reg |= (TTBCR2_ADDR_42 << TTBCR2_PASIZE_SHIFT);
- break;
- case 44:
- reg |= (TTBCR2_ADDR_44 << TTBCR2_PASIZE_SHIFT);
- break;
- case 48:
- reg |= (TTBCR2_ADDR_48 << TTBCR2_PASIZE_SHIFT);
- break;
- }
-
- if (stage1)
- writel_relaxed(reg, cb_base + ARM_SMMU_CB_TTBCR2);
+ writel_relaxed(reg, gr1_base + ARM_SMMU_GR1_CBA2R(cfg->cbndx));
}
- /* TTBR0 */
- arm_smmu_flush_pgtable(smmu, cfg->pgd,
- PTRS_PER_PGD * sizeof(pgd_t));
- reg = __pa(cfg->pgd);
- writel_relaxed(reg, cb_base + ARM_SMMU_CB_TTBR0_LO);
- reg = (phys_addr_t)__pa(cfg->pgd) >> 32;
- if (stage1)
+ /* TTBRs */
+ if (stage1) {
+ reg = pgtbl_cfg->arm_lpae_s1_cfg.ttbr[0];
+ writel_relaxed(reg, cb_base + ARM_SMMU_CB_TTBR0_LO);
+ reg = pgtbl_cfg->arm_lpae_s1_cfg.ttbr[0] >> 32;
reg |= ARM_SMMU_CB_ASID(cfg) << TTBRn_HI_ASID_SHIFT;
- writel_relaxed(reg, cb_base + ARM_SMMU_CB_TTBR0_HI);
-
- /*
- * TTBCR
- * We use long descriptor, with inner-shareable WBWA tables in TTBR0.
- */
- if (smmu->version > ARM_SMMU_V1) {
- if (PAGE_SIZE == SZ_4K)
- reg = TTBCR_TG0_4K;
- else
- reg = TTBCR_TG0_64K;
+ writel_relaxed(reg, cb_base + ARM_SMMU_CB_TTBR0_HI);
- if (!stage1) {
- reg |= (64 - smmu->s2_input_size) << TTBCR_T0SZ_SHIFT;
+ reg = pgtbl_cfg->arm_lpae_s1_cfg.ttbr[1];
+ writel_relaxed(reg, cb_base + ARM_SMMU_CB_TTBR1_LO);
+ reg = pgtbl_cfg->arm_lpae_s1_cfg.ttbr[1] >> 32;
+ reg |= ARM_SMMU_CB_ASID(cfg) << TTBRn_HI_ASID_SHIFT;
+ writel_relaxed(reg, cb_base + ARM_SMMU_CB_TTBR1_HI);
+ } else {
+ reg = pgtbl_cfg->arm_lpae_s2_cfg.vttbr;
+ writel_relaxed(reg, cb_base + ARM_SMMU_CB_TTBR0_LO);
+ reg = pgtbl_cfg->arm_lpae_s2_cfg.vttbr >> 32;
+ writel_relaxed(reg, cb_base + ARM_SMMU_CB_TTBR0_HI);
+ }
- switch (smmu->s2_output_size) {
+ /* TTBCR */
+ if (stage1) {
+ reg = pgtbl_cfg->arm_lpae_s1_cfg.tcr;
+ writel_relaxed(reg, cb_base + ARM_SMMU_CB_TTBCR);
+ if (smmu->version > ARM_SMMU_V1) {
+ reg = pgtbl_cfg->arm_lpae_s1_cfg.tcr >> 32;
+ switch (smmu->va_size) {
case 32:
- reg |= (TTBCR2_ADDR_32 << TTBCR_PASIZE_SHIFT);
+ reg |= (TTBCR2_ADDR_32 << TTBCR2_SEP_SHIFT);
break;
case 36:
- reg |= (TTBCR2_ADDR_36 << TTBCR_PASIZE_SHIFT);
+ reg |= (TTBCR2_ADDR_36 << TTBCR2_SEP_SHIFT);
break;
case 40:
- reg |= (TTBCR2_ADDR_40 << TTBCR_PASIZE_SHIFT);
+ reg |= (TTBCR2_ADDR_40 << TTBCR2_SEP_SHIFT);
break;
case 42:
- reg |= (TTBCR2_ADDR_42 << TTBCR_PASIZE_SHIFT);
+ reg |= (TTBCR2_ADDR_42 << TTBCR2_SEP_SHIFT);
break;
case 44:
- reg |= (TTBCR2_ADDR_44 << TTBCR_PASIZE_SHIFT);
+ reg |= (TTBCR2_ADDR_44 << TTBCR2_SEP_SHIFT);
break;
case 48:
- reg |= (TTBCR2_ADDR_48 << TTBCR_PASIZE_SHIFT);
+ reg |= (TTBCR2_ADDR_48 << TTBCR2_SEP_SHIFT);
break;
}
- } else {
- reg |= (64 - smmu->s1_input_size) << TTBCR_T0SZ_SHIFT;
+ writel_relaxed(reg, cb_base + ARM_SMMU_CB_TTBCR2);
}
} else {
- reg = 0;
+ reg = pgtbl_cfg->arm_lpae_s2_cfg.vtcr;
+ writel_relaxed(reg, cb_base + ARM_SMMU_CB_TTBCR);
}
- reg |= TTBCR_EAE |
- (TTBCR_SH_IS << TTBCR_SH0_SHIFT) |
- (TTBCR_RGN_WBWA << TTBCR_ORGN0_SHIFT) |
- (TTBCR_RGN_WBWA << TTBCR_IRGN0_SHIFT);
-
- if (!stage1)
- reg |= (TTBCR_SL0_LVL_1 << TTBCR_SL0_SHIFT);
-
- writel_relaxed(reg, cb_base + ARM_SMMU_CB_TTBCR);
-
- /* MAIR0 (stage-1 only) */
+ /* MAIRs (stage-1 only) */
if (stage1) {
- reg = (MAIR_ATTR_NC << MAIR_ATTR_SHIFT(MAIR_ATTR_IDX_NC)) |
- (MAIR_ATTR_WBRWA << MAIR_ATTR_SHIFT(MAIR_ATTR_IDX_CACHE)) |
- (MAIR_ATTR_DEVICE << MAIR_ATTR_SHIFT(MAIR_ATTR_IDX_DEV));
+ reg = pgtbl_cfg->arm_lpae_s1_cfg.mair[0];
writel_relaxed(reg, cb_base + ARM_SMMU_CB_S1_MAIR0);
+ reg = pgtbl_cfg->arm_lpae_s1_cfg.mair[1];
+ writel_relaxed(reg, cb_base + ARM_SMMU_CB_S1_MAIR1);
}
/* SCTLR */
@@ -905,11 +813,14 @@ static int arm_smmu_init_domain_context(struct iommu_domain *domain,
struct arm_smmu_device *smmu)
{
int irq, start, ret = 0;
- unsigned long flags;
+ unsigned long ias, oas;
+ struct io_pgtable_ops *pgtbl_ops;
+ struct io_pgtable_cfg pgtbl_cfg;
+ enum io_pgtable_fmt fmt;
struct arm_smmu_domain *smmu_domain = domain->priv;
struct arm_smmu_cfg *cfg = &smmu_domain->cfg;
- spin_lock_irqsave(&smmu_domain->lock, flags);
+ mutex_lock(&smmu_domain->init_mutex);
if (smmu_domain->smmu)
goto out_unlock;
@@ -940,6 +851,9 @@ static int arm_smmu_init_domain_context(struct iommu_domain *domain,
case ARM_SMMU_DOMAIN_S1:
cfg->cbar = CBAR_TYPE_S1_TRANS_S2_BYPASS;
start = smmu->num_s2_context_banks;
+ ias = smmu->va_size;
+ oas = smmu->ipa_size;
+ fmt = ARM_LPAE_S1;
break;
case ARM_SMMU_DOMAIN_NESTED:
/*
@@ -949,6 +863,9 @@ static int arm_smmu_init_domain_context(struct iommu_domain *domain,
case ARM_SMMU_DOMAIN_S2:
cfg->cbar = CBAR_TYPE_S2_TRANS;
start = 0;
+ ias = smmu->ipa_size;
+ oas = smmu->pa_size;
+ fmt = ARM_LPAE_S2;
break;
default:
ret = -EINVAL;
@@ -968,10 +885,30 @@ static int arm_smmu_init_domain_context(struct iommu_domain *domain,
cfg->irptndx = cfg->cbndx;
}
- ACCESS_ONCE(smmu_domain->smmu) = smmu;
- arm_smmu_init_context_bank(smmu_domain);
- spin_unlock_irqrestore(&smmu_domain->lock, flags);
+ pgtbl_cfg = (struct io_pgtable_cfg) {
+ .pgsize_bitmap = arm_smmu_ops.pgsize_bitmap,
+ .ias = ias,
+ .oas = oas,
+ .tlb = &arm_smmu_gather_ops,
+ };
+ smmu_domain->smmu = smmu;
+ pgtbl_ops = alloc_io_pgtable_ops(fmt, &pgtbl_cfg, smmu_domain);
+ if (!pgtbl_ops) {
+ ret = -ENOMEM;
+ goto out_clear_smmu;
+ }
+
+ /* Update our support page sizes to reflect the page table format */
+ arm_smmu_ops.pgsize_bitmap = pgtbl_cfg.pgsize_bitmap;
+
+ /* Initialise the context bank with our page table cfg */
+ arm_smmu_init_context_bank(smmu_domain, &pgtbl_cfg);
+
+ /*
+ * Request context fault interrupt. Do this last to avoid the
+ * handler seeing a half-initialised domain state.
+ */
irq = smmu->irqs[smmu->num_global_irqs + cfg->irptndx];
ret = request_irq(irq, arm_smmu_context_fault, IRQF_SHARED,
"arm-smmu-context-fault", domain);
@@ -981,10 +918,16 @@ static int arm_smmu_init_domain_context(struct iommu_domain *domain,
cfg->irptndx = INVALID_IRPTNDX;
}
+ mutex_unlock(&smmu_domain->init_mutex);
+
+ /* Publish page table ops for map/unmap */
+ smmu_domain->pgtbl_ops = pgtbl_ops;
return 0;
+out_clear_smmu:
+ smmu_domain->smmu = NULL;
out_unlock:
- spin_unlock_irqrestore(&smmu_domain->lock, flags);
+ mutex_unlock(&smmu_domain->init_mutex);
return ret;
}
@@ -999,23 +942,27 @@ static void arm_smmu_destroy_domain_context(struct iommu_domain *domain)
if (!smmu)
return;
- /* Disable the context bank and nuke the TLB before freeing it. */
+ /*
+ * Disable the context bank and free the page tables before freeing
+ * it.
+ */
cb_base = ARM_SMMU_CB_BASE(smmu) + ARM_SMMU_CB(smmu, cfg->cbndx);
writel_relaxed(0, cb_base + ARM_SMMU_CB_SCTLR);
- arm_smmu_tlb_inv_context(smmu_domain);
if (cfg->irptndx != INVALID_IRPTNDX) {
irq = smmu->irqs[smmu->num_global_irqs + cfg->irptndx];
free_irq(irq, domain);
}
+ if (smmu_domain->pgtbl_ops)
+ free_io_pgtable_ops(smmu_domain->pgtbl_ops);
+
__arm_smmu_free_bitmap(smmu->context_map, cfg->cbndx);
}
static int arm_smmu_domain_init(struct iommu_domain *domain)
{
struct arm_smmu_domain *smmu_domain;
- pgd_t *pgd;
/*
* Allocate the domain and initialise some of its data structures.
@@ -1026,81 +973,10 @@ static int arm_smmu_domain_init(struct iommu_domain *domain)
if (!smmu_domain)
return -ENOMEM;
- pgd = kcalloc(PTRS_PER_PGD, sizeof(pgd_t), GFP_KERNEL);
- if (!pgd)
- goto out_free_domain;
- smmu_domain->cfg.pgd = pgd;
-
- spin_lock_init(&smmu_domain->lock);
+ mutex_init(&smmu_domain->init_mutex);
+ spin_lock_init(&smmu_domain->pgtbl_lock);
domain->priv = smmu_domain;
return 0;
-
-out_free_domain:
- kfree(smmu_domain);
- return -ENOMEM;
-}
-
-static void arm_smmu_free_ptes(pmd_t *pmd)
-{
- pgtable_t table = pmd_pgtable(*pmd);
-
- __free_page(table);
-}
-
-static void arm_smmu_free_pmds(pud_t *pud)
-{
- int i;
- pmd_t *pmd, *pmd_base = pmd_offset(pud, 0);
-
- pmd = pmd_base;
- for (i = 0; i < PTRS_PER_PMD; ++i) {
- if (pmd_none(*pmd))
- continue;
-
- arm_smmu_free_ptes(pmd);
- pmd++;
- }
-
- pmd_free(NULL, pmd_base);
-}
-
-static void arm_smmu_free_puds(pgd_t *pgd)
-{
- int i;
- pud_t *pud, *pud_base = pud_offset(pgd, 0);
-
- pud = pud_base;
- for (i = 0; i < PTRS_PER_PUD; ++i) {
- if (pud_none(*pud))
- continue;
-
- arm_smmu_free_pmds(pud);
- pud++;
- }
-
- pud_free(NULL, pud_base);
-}
-
-static void arm_smmu_free_pgtables(struct arm_smmu_domain *smmu_domain)
-{
- int i;
- struct arm_smmu_cfg *cfg = &smmu_domain->cfg;
- pgd_t *pgd, *pgd_base = cfg->pgd;
-
- /*
- * Recursively free the page tables for this domain. We don't
- * 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) {
- if (pgd_none(*pgd))
- continue;
- arm_smmu_free_puds(pgd);
- pgd++;
- }
-
- kfree(pgd_base);
}
static void arm_smmu_domain_destroy(struct iommu_domain *domain)
@@ -1112,7 +988,6 @@ static void arm_smmu_domain_destroy(struct iommu_domain *domain)
* already been detached.
*/
arm_smmu_destroy_domain_context(domain);
- arm_smmu_free_pgtables(smmu_domain);
kfree(smmu_domain);
}
@@ -1244,7 +1119,7 @@ static int arm_smmu_attach_dev(struct iommu_domain *domain, struct device *dev)
{
int ret;
struct arm_smmu_domain *smmu_domain = domain->priv;
- struct arm_smmu_device *smmu, *dom_smmu;
+ struct arm_smmu_device *smmu;
struct arm_smmu_master_cfg *cfg;
smmu = find_smmu_for_device(dev);
@@ -1258,21 +1133,16 @@ static int arm_smmu_attach_dev(struct iommu_domain *domain, struct device *dev)
return -EEXIST;
}
+ /* Ensure that the domain is finalised */
+ ret = arm_smmu_init_domain_context(domain, smmu);
+ if (IS_ERR_VALUE(ret))
+ return ret;
+
/*
* Sanity check the domain. We don't support domains across
* different SMMUs.
*/
- dom_smmu = ACCESS_ONCE(smmu_domain->smmu);
- if (!dom_smmu) {
- /* Now that we have a master, we can finalise the domain */
- ret = arm_smmu_init_domain_context(domain, smmu);
- if (IS_ERR_VALUE(ret))
- return ret;
-
- dom_smmu = smmu_domain->smmu;
- }
-
- if (dom_smmu != smmu) {
+ if (smmu_domain->smmu != smmu) {
dev_err(dev,
"cannot attach to SMMU %s whilst already attached to domain on SMMU %s\n",
dev_name(smmu_domain->smmu->dev), dev_name(smmu->dev));
@@ -1303,293 +1173,55 @@ static void arm_smmu_detach_dev(struct iommu_domain *domain, struct device *dev)
arm_smmu_domain_remove_master(smmu_domain, cfg);
}
-static bool arm_smmu_pte_is_contiguous_range(unsigned long addr,
- unsigned long end)
-{
- return !(addr & ~ARM_SMMU_PTE_CONT_MASK) &&
- (addr + ARM_SMMU_PTE_CONT_SIZE <= end);
-}
-
-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 prot, int stage)
-{
- pte_t *pte, *start;
- pteval_t pteval = ARM_SMMU_PTE_PAGE | ARM_SMMU_PTE_AF;
-
- if (pmd_none(*pmd)) {
- /* Allocate a new set of tables */
- pgtable_t table = alloc_page(GFP_ATOMIC|__GFP_ZERO);
-
- if (!table)
- return -ENOMEM;
-
- arm_smmu_flush_pgtable(smmu, page_address(table), PAGE_SIZE);
- pmd_populate(NULL, pmd, table);
- arm_smmu_flush_pgtable(smmu, pmd, sizeof(*pmd));
- }
-
- if (stage == 1) {
- pteval |= ARM_SMMU_PTE_AP_UNPRIV | ARM_SMMU_PTE_nG;
- if (!(prot & IOMMU_WRITE) && (prot & IOMMU_READ))
- pteval |= ARM_SMMU_PTE_AP_RDONLY;
-
- if (prot & IOMMU_CACHE)
- pteval |= (MAIR_ATTR_IDX_CACHE <<
- ARM_SMMU_PTE_ATTRINDX_SHIFT);
- } else {
- pteval |= ARM_SMMU_PTE_HAP_FAULT;
- if (prot & IOMMU_READ)
- pteval |= ARM_SMMU_PTE_HAP_READ;
- if (prot & IOMMU_WRITE)
- pteval |= ARM_SMMU_PTE_HAP_WRITE;
- if (prot & IOMMU_CACHE)
- pteval |= ARM_SMMU_PTE_MEMATTR_OIWB;
- else
- pteval |= ARM_SMMU_PTE_MEMATTR_NC;
- }
-
- if (prot & IOMMU_NOEXEC)
- pteval |= ARM_SMMU_PTE_XN;
-
- /* If no access, create a faulting entry to avoid TLB fills */
- if (!(prot & (IOMMU_READ | IOMMU_WRITE)))
- pteval &= ~ARM_SMMU_PTE_PAGE;
-
- pteval |= ARM_SMMU_PTE_SH_IS;
- start = pmd_page_vaddr(*pmd) + pte_index(addr);
- pte = start;
-
- /*
- * Install the page table entries. This is fairly complicated
- * since we attempt to make use of the contiguous hint in the
- * ptes where possible. The contiguous hint indicates a series
- * of ARM_SMMU_PTE_CONT_ENTRIES ptes mapping a physically
- * contiguous region with the following constraints:
- *
- * - The region start is aligned to ARM_SMMU_PTE_CONT_SIZE
- * - Each pte in the region has the contiguous hint bit set
- *
- * This complicates unmapping (also handled by this code, when
- * neither IOMMU_READ or IOMMU_WRITE are set) because it is
- * possible, yet highly unlikely, that a client may unmap only
- * part of a contiguous range. This requires clearing of the
- * contiguous hint bits in the range before installing the new
- * faulting entries.
- *
- * Note that re-mapping an address range without first unmapping
- * it is not supported, so TLB invalidation is not required here
- * and is instead performed at unmap and domain-init time.
- */
- do {
- int i = 1;
-
- pteval &= ~ARM_SMMU_PTE_CONT;
-
- if (arm_smmu_pte_is_contiguous_range(addr, end)) {
- i = ARM_SMMU_PTE_CONT_ENTRIES;
- pteval |= ARM_SMMU_PTE_CONT;
- } else if (pte_val(*pte) &
- (ARM_SMMU_PTE_CONT | ARM_SMMU_PTE_PAGE)) {
- int j;
- pte_t *cont_start;
- unsigned long idx = pte_index(addr);
-
- idx &= ~(ARM_SMMU_PTE_CONT_ENTRIES - 1);
- cont_start = pmd_page_vaddr(*pmd) + idx;
- for (j = 0; j < ARM_SMMU_PTE_CONT_ENTRIES; ++j)
- pte_val(*(cont_start + j)) &=
- ~ARM_SMMU_PTE_CONT;
-
- arm_smmu_flush_pgtable(smmu, cont_start,
- sizeof(*pte) *
- ARM_SMMU_PTE_CONT_ENTRIES);
- }
-
- do {
- *pte = pfn_pte(pfn, __pgprot(pteval));
- } while (pte++, pfn++, addr += PAGE_SIZE, --i);
- } while (addr != end);
-
- arm_smmu_flush_pgtable(smmu, start, sizeof(*pte) * (pte - start));
- return 0;
-}
-
-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 prot, int stage)
-{
- int ret;
- pmd_t *pmd;
- unsigned long next, pfn = __phys_to_pfn(phys);
-
-#ifndef __PAGETABLE_PMD_FOLDED
- if (pud_none(*pud)) {
- pmd = (pmd_t *)get_zeroed_page(GFP_ATOMIC);
- if (!pmd)
- return -ENOMEM;
-
- arm_smmu_flush_pgtable(smmu, pmd, PAGE_SIZE);
- pud_populate(NULL, pud, pmd);
- arm_smmu_flush_pgtable(smmu, pud, sizeof(*pud));
-
- pmd += pmd_index(addr);
- } else
-#endif
- pmd = pmd_offset(pud, addr);
-
- do {
- next = pmd_addr_end(addr, end);
- ret = arm_smmu_alloc_init_pte(smmu, pmd, addr, next, pfn,
- prot, stage);
- phys += next - addr;
- pfn = __phys_to_pfn(phys);
- } while (pmd++, addr = next, addr < end);
-
- return ret;
-}
-
-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 prot, int stage)
-{
- int ret = 0;
- pud_t *pud;
- unsigned long next;
-
-#ifndef __PAGETABLE_PUD_FOLDED
- if (pgd_none(*pgd)) {
- pud = (pud_t *)get_zeroed_page(GFP_ATOMIC);
- if (!pud)
- return -ENOMEM;
-
- arm_smmu_flush_pgtable(smmu, pud, PAGE_SIZE);
- pgd_populate(NULL, pgd, pud);
- arm_smmu_flush_pgtable(smmu, pgd, sizeof(*pgd));
-
- pud += pud_index(addr);
- } else
-#endif
- pud = pud_offset(pgd, addr);
-
- do {
- next = pud_addr_end(addr, end);
- ret = arm_smmu_alloc_init_pmd(smmu, pud, addr, next, phys,
- prot, stage);
- phys += next - addr;
- } while (pud++, addr = next, addr < end);
-
- return ret;
-}
-
-static int arm_smmu_handle_mapping(struct arm_smmu_domain *smmu_domain,
- unsigned long iova, phys_addr_t paddr,
- size_t size, int prot)
-{
- int ret, stage;
- unsigned long end;
- phys_addr_t input_mask, output_mask;
- struct arm_smmu_device *smmu = smmu_domain->smmu;
- struct arm_smmu_cfg *cfg = &smmu_domain->cfg;
- pgd_t *pgd = cfg->pgd;
- unsigned long flags;
-
- if (cfg->cbar == CBAR_TYPE_S2_TRANS) {
- stage = 2;
- input_mask = (1ULL << smmu->s2_input_size) - 1;
- output_mask = (1ULL << smmu->s2_output_size) - 1;
- } else {
- stage = 1;
- input_mask = (1ULL << smmu->s1_input_size) - 1;
- output_mask = (1ULL << smmu->s1_output_size) - 1;
- }
-
- if (!pgd)
- return -EINVAL;
-
- if (size & ~PAGE_MASK)
- return -EINVAL;
-
- if ((phys_addr_t)iova & ~input_mask)
- return -ERANGE;
-
- if (paddr & ~output_mask)
- return -ERANGE;
-
- 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,
- prot, stage);
- if (ret)
- goto out_unlock;
-
- paddr += next - iova;
- iova = next;
- } while (pgd++, iova != end);
-
-out_unlock:
- 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 prot)
{
+ int ret;
+ unsigned long flags;
struct arm_smmu_domain *smmu_domain = domain->priv;
+ struct io_pgtable_ops *ops= smmu_domain->pgtbl_ops;
- if (!smmu_domain)
+ if (!ops)
return -ENODEV;
- return arm_smmu_handle_mapping(smmu_domain, iova, paddr, size, prot);
+ spin_lock_irqsave(&smmu_domain->pgtbl_lock, flags);
+ ret = ops->map(ops, iova, paddr, size, prot);
+ spin_unlock_irqrestore(&smmu_domain->pgtbl_lock, flags);
+ return ret;
}
static size_t arm_smmu_unmap(struct iommu_domain *domain, unsigned long iova,
size_t size)
{
- int ret;
+ size_t ret;
+ unsigned long flags;
struct arm_smmu_domain *smmu_domain = domain->priv;
+ struct io_pgtable_ops *ops= smmu_domain->pgtbl_ops;
+
+ if (!ops)
+ return 0;
- ret = arm_smmu_handle_mapping(smmu_domain, iova, 0, size, 0);
- arm_smmu_tlb_inv_context(smmu_domain);
- return ret ? 0 : size;
+ spin_lock_irqsave(&smmu_domain->pgtbl_lock, flags);
+ ret = ops->unmap(ops, iova, size);
+ spin_unlock_irqrestore(&smmu_domain->pgtbl_lock, flags);
+ return ret;
}
static phys_addr_t arm_smmu_iova_to_phys(struct iommu_domain *domain,
dma_addr_t iova)
{
- pgd_t *pgdp, pgd;
- pud_t pud;
- pmd_t pmd;
- pte_t pte;
+ phys_addr_t ret;
+ unsigned long flags;
struct arm_smmu_domain *smmu_domain = domain->priv;
- struct arm_smmu_cfg *cfg = &smmu_domain->cfg;
+ struct io_pgtable_ops *ops= smmu_domain->pgtbl_ops;
- pgdp = cfg->pgd;
- if (!pgdp)
+ if (!ops)
return 0;
- pgd = *(pgdp + pgd_index(iova));
- if (pgd_none(pgd))
- return 0;
-
- pud = *pud_offset(&pgd, iova);
- if (pud_none(pud))
- return 0;
-
- pmd = *pmd_offset(&pud, iova);
- if (pmd_none(pmd))
- return 0;
-
- pte = *(pmd_page_vaddr(pmd) + pte_index(iova));
- if (pte_none(pte))
- return 0;
-
- return __pfn_to_phys(pte_pfn(pte)) | (iova & ~PAGE_MASK);
+ spin_lock_irqsave(&smmu_domain->pgtbl_lock, flags);
+ ret = ops->iova_to_phys(ops, iova);
+ spin_unlock_irqrestore(&smmu_domain->pgtbl_lock, flags);
+ return ret;
}
static bool arm_smmu_capable(enum iommu_cap cap)
@@ -1698,24 +1330,34 @@ static int arm_smmu_domain_get_attr(struct iommu_domain *domain,
static int arm_smmu_domain_set_attr(struct iommu_domain *domain,
enum iommu_attr attr, void *data)
{
+ int ret = 0;
struct arm_smmu_domain *smmu_domain = domain->priv;
+ mutex_lock(&smmu_domain->init_mutex);
+
switch (attr) {
case DOMAIN_ATTR_NESTING:
- if (smmu_domain->smmu)
- return -EPERM;
+ if (smmu_domain->smmu) {
+ ret = -EPERM;
+ goto out_unlock;
+ }
+
if (*(int *)data)
smmu_domain->stage = ARM_SMMU_DOMAIN_NESTED;
else
smmu_domain->stage = ARM_SMMU_DOMAIN_S1;
- return 0;
+ break;
default:
- return -ENODEV;
+ ret = -ENODEV;
}
+
+out_unlock:
+ mutex_unlock(&smmu_domain->init_mutex);
+ return ret;
}
-static const struct iommu_ops arm_smmu_ops = {
+static struct iommu_ops arm_smmu_ops = {
.capable = arm_smmu_capable,
.domain_init = arm_smmu_domain_init,
.domain_destroy = arm_smmu_domain_destroy,
@@ -1728,9 +1370,7 @@ static const struct iommu_ops arm_smmu_ops = {
.remove_device = arm_smmu_remove_device,
.domain_get_attr = arm_smmu_domain_get_attr,
.domain_set_attr = arm_smmu_domain_set_attr,
- .pgsize_bitmap = (SECTION_SIZE |
- ARM_SMMU_PTE_CONT_SIZE |
- PAGE_SIZE),
+ .pgsize_bitmap = -1UL, /* Restricted during device attach */
};
static void arm_smmu_device_reset(struct arm_smmu_device *smmu)
@@ -1781,7 +1421,7 @@ static void arm_smmu_device_reset(struct arm_smmu_device *smmu)
reg &= ~(sCR0_BSU_MASK << sCR0_BSU_SHIFT);
/* Push the button */
- arm_smmu_tlb_sync(smmu);
+ __arm_smmu_tlb_sync(smmu);
writel(reg, ARM_SMMU_GR0_NS(smmu) + ARM_SMMU_GR0_sCR0);
}
@@ -1815,12 +1455,6 @@ static int arm_smmu_device_cfg_probe(struct arm_smmu_device *smmu)
/* ID0 */
id = readl_relaxed(gr0_base + ARM_SMMU_GR0_ID0);
-#ifndef CONFIG_64BIT
- if (((id >> ID0_PTFS_SHIFT) & ID0_PTFS_MASK) == ID0_PTFS_V8_ONLY) {
- dev_err(smmu->dev, "\tno v7 descriptor support!\n");
- return -ENODEV;
- }
-#endif
/* Restrict available stages based on module parameter */
if (force_stage == 1)
@@ -1893,16 +1527,14 @@ static int arm_smmu_device_cfg_probe(struct arm_smmu_device *smmu)
smmu->pgshift = (id & ID1_PAGESIZE) ? 16 : 12;
/* Check for size mismatch of SMMU address space from mapped region */
- size = 1 <<
- (((id >> ID1_NUMPAGENDXB_SHIFT) & ID1_NUMPAGENDXB_MASK) + 1);
+ size = 1 << (((id >> ID1_NUMPAGENDXB_SHIFT) & ID1_NUMPAGENDXB_MASK) + 1);
size *= 2 << smmu->pgshift;
if (smmu->size != size)
dev_warn(smmu->dev,
"SMMU address space size (0x%lx) differs from mapped region size (0x%lx)!\n",
size, smmu->size);
- smmu->num_s2_context_banks = (id >> ID1_NUMS2CB_SHIFT) &
- ID1_NUMS2CB_MASK;
+ smmu->num_s2_context_banks = (id >> ID1_NUMS2CB_SHIFT) & ID1_NUMS2CB_MASK;
smmu->num_context_banks = (id >> ID1_NUMCB_SHIFT) & ID1_NUMCB_MASK;
if (smmu->num_s2_context_banks > smmu->num_context_banks) {
dev_err(smmu->dev, "impossible number of S2 context banks!\n");
@@ -1914,46 +1546,40 @@ static int arm_smmu_device_cfg_probe(struct arm_smmu_device *smmu)
/* ID2 */
id = readl_relaxed(gr0_base + ARM_SMMU_GR0_ID2);
size = arm_smmu_id_size_to_bits((id >> ID2_IAS_SHIFT) & ID2_IAS_MASK);
- smmu->s1_output_size = min_t(unsigned long, PHYS_MASK_SHIFT, size);
+ smmu->ipa_size = size;
- /* Stage-2 input size limited due to pgd allocation (PTRS_PER_PGD) */
-#ifdef CONFIG_64BIT
- smmu->s2_input_size = min_t(unsigned long, VA_BITS, size);
-#else
- smmu->s2_input_size = min(32UL, size);
-#endif
-
- /* The stage-2 output mask is also applied for bypass */
+ /* The output mask is also applied for bypass */
size = arm_smmu_id_size_to_bits((id >> ID2_OAS_SHIFT) & ID2_OAS_MASK);
- smmu->s2_output_size = min_t(unsigned long, PHYS_MASK_SHIFT, size);
+ smmu->pa_size = size;
if (smmu->version == ARM_SMMU_V1) {
- smmu->s1_input_size = 32;
+ smmu->va_size = smmu->ipa_size;
+ size = SZ_4K | SZ_2M | SZ_1G;
} else {
-#ifdef CONFIG_64BIT
size = (id >> ID2_UBS_SHIFT) & ID2_UBS_MASK;
- size = min(VA_BITS, arm_smmu_id_size_to_bits(size));
-#else
- size = 32;
+ smmu->va_size = arm_smmu_id_size_to_bits(size);
+#ifndef CONFIG_64BIT
+ smmu->va_size = min(32UL, smmu->va_size);
#endif
- smmu->s1_input_size = size;
-
- if ((PAGE_SIZE == SZ_4K && !(id & ID2_PTFS_4K)) ||
- (PAGE_SIZE == SZ_64K && !(id & ID2_PTFS_64K)) ||
- (PAGE_SIZE != SZ_4K && PAGE_SIZE != SZ_64K)) {
- dev_err(smmu->dev, "CPU page size 0x%lx unsupported\n",
- PAGE_SIZE);
- return -ENODEV;
- }
+ size = 0;
+ if (id & ID2_PTFS_4K)
+ size |= SZ_4K | SZ_2M | SZ_1G;
+ if (id & ID2_PTFS_16K)
+ size |= SZ_16K | SZ_32M;
+ if (id & ID2_PTFS_64K)
+ size |= SZ_64K | SZ_512M;
}
+ arm_smmu_ops.pgsize_bitmap &= size;
+ dev_notice(smmu->dev, "\tSupported page sizes: 0x%08lx\n", size);
+
if (smmu->features & ARM_SMMU_FEAT_TRANS_S1)
dev_notice(smmu->dev, "\tStage-1: %lu-bit VA -> %lu-bit IPA\n",
- smmu->s1_input_size, smmu->s1_output_size);
+ smmu->va_size, smmu->ipa_size);
if (smmu->features & ARM_SMMU_FEAT_TRANS_S2)
dev_notice(smmu->dev, "\tStage-2: %lu-bit IPA -> %lu-bit PA\n",
- smmu->s2_input_size, smmu->s2_output_size);
+ smmu->ipa_size, smmu->pa_size);
return 0;
}
--
2.1.1
More information about the linux-arm-kernel
mailing list