diff options
author | Yunfei Wang <yf.wang@mediatek.com> | 2022-06-30 12:29:25 +0300 |
---|---|---|
committer | Joerg Roedel <jroedel@suse.de> | 2022-07-07 10:42:59 +0300 |
commit | bfdd231374181254742c5e2faef0bef2d30c0ee4 (patch) | |
tree | e88e3105918de01f8c673084a25cf6363ee3f4e1 /drivers/iommu/io-pgtable-arm-v7s.c | |
parent | 21fd9be431adb880e55cf7b6b918e0696c0be643 (diff) | |
download | linux-bfdd231374181254742c5e2faef0bef2d30c0ee4.tar.xz |
iommu/io-pgtable-arm-v7s: Add a quirk to allow pgtable PA up to 35bit
Single memory zone feature will remove ZONE_DMA32 and ZONE_DMA and
cause pgtable PA size larger than 32bit.
Since Mediatek IOMMU hardware support at most 35bit PA in pgtable,
so add a quirk to allow the PA of pgtables support up to bit35.
Signed-off-by: Ning Li <ning.li@mediatek.com>
Signed-off-by: Yunfei Wang <yf.wang@mediatek.com>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Acked-by: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20220630092927.24925-2-yf.wang@mediatek.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu/io-pgtable-arm-v7s.c')
-rw-r--r-- | drivers/iommu/io-pgtable-arm-v7s.c | 75 |
1 files changed, 56 insertions, 19 deletions
diff --git a/drivers/iommu/io-pgtable-arm-v7s.c b/drivers/iommu/io-pgtable-arm-v7s.c index be066c1503d3..ba3115fd0f86 100644 --- a/drivers/iommu/io-pgtable-arm-v7s.c +++ b/drivers/iommu/io-pgtable-arm-v7s.c @@ -182,14 +182,8 @@ static bool arm_v7s_is_mtk_enabled(struct io_pgtable_cfg *cfg) (cfg->quirks & IO_PGTABLE_QUIRK_ARM_MTK_EXT); } -static arm_v7s_iopte paddr_to_iopte(phys_addr_t paddr, int lvl, - struct io_pgtable_cfg *cfg) +static arm_v7s_iopte to_mtk_iopte(phys_addr_t paddr, arm_v7s_iopte pte) { - arm_v7s_iopte pte = paddr & ARM_V7S_LVL_MASK(lvl); - - if (!arm_v7s_is_mtk_enabled(cfg)) - return pte; - if (paddr & BIT_ULL(32)) pte |= ARM_V7S_ATTR_MTK_PA_BIT32; if (paddr & BIT_ULL(33)) @@ -199,6 +193,17 @@ static arm_v7s_iopte paddr_to_iopte(phys_addr_t paddr, int lvl, return pte; } +static arm_v7s_iopte paddr_to_iopte(phys_addr_t paddr, int lvl, + struct io_pgtable_cfg *cfg) +{ + arm_v7s_iopte pte = paddr & ARM_V7S_LVL_MASK(lvl); + + if (arm_v7s_is_mtk_enabled(cfg)) + return to_mtk_iopte(paddr, pte); + + return pte; +} + static phys_addr_t iopte_to_paddr(arm_v7s_iopte pte, int lvl, struct io_pgtable_cfg *cfg) { @@ -240,10 +245,17 @@ static void *__arm_v7s_alloc_table(int lvl, gfp_t gfp, dma_addr_t dma; size_t size = ARM_V7S_TABLE_SIZE(lvl, cfg); void *table = NULL; + gfp_t gfp_l1; + + /* + * ARM_MTK_TTBR_EXT extend the translation table base support larger + * memory address. + */ + gfp_l1 = cfg->quirks & IO_PGTABLE_QUIRK_ARM_MTK_TTBR_EXT ? + GFP_KERNEL : ARM_V7S_TABLE_GFP_DMA; if (lvl == 1) - table = (void *)__get_free_pages( - __GFP_ZERO | ARM_V7S_TABLE_GFP_DMA, get_order(size)); + table = (void *)__get_free_pages(gfp_l1 | __GFP_ZERO, get_order(size)); else if (lvl == 2) table = kmem_cache_zalloc(data->l2_tables, gfp); @@ -251,7 +263,8 @@ static void *__arm_v7s_alloc_table(int lvl, gfp_t gfp, return NULL; phys = virt_to_phys(table); - if (phys != (arm_v7s_iopte)phys) { + if (cfg->quirks & IO_PGTABLE_QUIRK_ARM_MTK_TTBR_EXT ? + phys >= (1ULL << cfg->oas) : phys != (arm_v7s_iopte)phys) { /* Doesn't fit in PTE */ dev_err(dev, "Page table does not fit in PTE: %pa", &phys); goto out_free; @@ -457,9 +470,14 @@ static arm_v7s_iopte arm_v7s_install_table(arm_v7s_iopte *table, arm_v7s_iopte curr, struct io_pgtable_cfg *cfg) { + phys_addr_t phys = virt_to_phys(table); arm_v7s_iopte old, new; - new = virt_to_phys(table) | ARM_V7S_PTE_TYPE_TABLE; + new = phys | ARM_V7S_PTE_TYPE_TABLE; + + if (cfg->quirks & IO_PGTABLE_QUIRK_ARM_MTK_TTBR_EXT) + new = to_mtk_iopte(phys, new); + if (cfg->quirks & IO_PGTABLE_QUIRK_ARM_NS) new |= ARM_V7S_ATTR_NS_TABLE; @@ -779,6 +797,8 @@ static struct io_pgtable *arm_v7s_alloc_pgtable(struct io_pgtable_cfg *cfg, void *cookie) { struct arm_v7s_io_pgtable *data; + slab_flags_t slab_flag; + phys_addr_t paddr; if (cfg->ias > (arm_v7s_is_mtk_enabled(cfg) ? 34 : ARM_V7S_ADDR_BITS)) return NULL; @@ -788,7 +808,8 @@ static struct io_pgtable *arm_v7s_alloc_pgtable(struct io_pgtable_cfg *cfg, if (cfg->quirks & ~(IO_PGTABLE_QUIRK_ARM_NS | IO_PGTABLE_QUIRK_NO_PERMS | - IO_PGTABLE_QUIRK_ARM_MTK_EXT)) + IO_PGTABLE_QUIRK_ARM_MTK_EXT | + IO_PGTABLE_QUIRK_ARM_MTK_TTBR_EXT)) return NULL; /* If ARM_MTK_4GB is enabled, the NO_PERMS is also expected. */ @@ -796,15 +817,27 @@ static struct io_pgtable *arm_v7s_alloc_pgtable(struct io_pgtable_cfg *cfg, !(cfg->quirks & IO_PGTABLE_QUIRK_NO_PERMS)) return NULL; + if ((cfg->quirks & IO_PGTABLE_QUIRK_ARM_MTK_TTBR_EXT) && + !arm_v7s_is_mtk_enabled(cfg)) + return NULL; + data = kmalloc(sizeof(*data), GFP_KERNEL); if (!data) return NULL; spin_lock_init(&data->split_lock); + + /* + * ARM_MTK_TTBR_EXT extend the translation table base support larger + * memory address. + */ + slab_flag = cfg->quirks & IO_PGTABLE_QUIRK_ARM_MTK_TTBR_EXT ? + 0 : ARM_V7S_TABLE_SLAB_FLAGS; + data->l2_tables = kmem_cache_create("io-pgtable_armv7s_l2", ARM_V7S_TABLE_SIZE(2, cfg), ARM_V7S_TABLE_SIZE(2, cfg), - ARM_V7S_TABLE_SLAB_FLAGS, NULL); + slab_flag, NULL); if (!data->l2_tables) goto out_free_data; @@ -850,12 +883,16 @@ static struct io_pgtable *arm_v7s_alloc_pgtable(struct io_pgtable_cfg *cfg, wmb(); /* TTBR */ - cfg->arm_v7s_cfg.ttbr = virt_to_phys(data->pgd) | ARM_V7S_TTBR_S | - (cfg->coherent_walk ? (ARM_V7S_TTBR_NOS | - ARM_V7S_TTBR_IRGN_ATTR(ARM_V7S_RGN_WBWA) | - ARM_V7S_TTBR_ORGN_ATTR(ARM_V7S_RGN_WBWA)) : - (ARM_V7S_TTBR_IRGN_ATTR(ARM_V7S_RGN_NC) | - ARM_V7S_TTBR_ORGN_ATTR(ARM_V7S_RGN_NC))); + paddr = virt_to_phys(data->pgd); + if (arm_v7s_is_mtk_enabled(cfg)) + cfg->arm_v7s_cfg.ttbr = paddr | upper_32_bits(paddr); + else + cfg->arm_v7s_cfg.ttbr = paddr | ARM_V7S_TTBR_S | + (cfg->coherent_walk ? (ARM_V7S_TTBR_NOS | + ARM_V7S_TTBR_IRGN_ATTR(ARM_V7S_RGN_WBWA) | + ARM_V7S_TTBR_ORGN_ATTR(ARM_V7S_RGN_WBWA)) : + (ARM_V7S_TTBR_IRGN_ATTR(ARM_V7S_RGN_NC) | + ARM_V7S_TTBR_ORGN_ATTR(ARM_V7S_RGN_NC))); return &data->iop; out_free_data: |