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iommu/io-pgtable-arm-v7s: Extend PA34 for MediaTek

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MediaTek extend the bit5 in lvl1 and lvl2 descriptor as PA34.

Signed-off-by: Yong Wu <yong.wu@mediatek.com>
Acked-by: Will Deacon <will@kernel.org>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Reviewed-by: Tomasz Figa <tfiga@chromium.org>
Link: https://lore.kernel.org/r/20210111111914.22211-11-yong.wu@mediatek.com
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Yong Wu 2021-01-11 19:18:51 +08:00 committed by Will Deacon
parent 859da21112
commit 40596d2f2b
3 changed files with 10 additions and 5 deletions
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9
drivers/iommu/io-pgtable-arm-v7s.c
View file

@ -112,9 +112,10 @@
#define ARM_V7S_TEX_MASK 0x7
#define ARM_V7S_ATTR_TEX(val) (((val) & ARM_V7S_TEX_MASK) << ARM_V7S_TEX_SHIFT)
/* MediaTek extend the two bits for PA 32bit/33bit */
/* MediaTek extend the bits below for PA 32bit/33bit/34bit */
#define ARM_V7S_ATTR_MTK_PA_BIT32 BIT(9)
#define ARM_V7S_ATTR_MTK_PA_BIT33 BIT(4)
#define ARM_V7S_ATTR_MTK_PA_BIT34 BIT(5)
/* *well, except for TEX on level 2 large pages, of course :( */
#define ARM_V7S_CONT_PAGE_TEX_SHIFT 6
@ -194,6 +195,8 @@ static arm_v7s_iopte paddr_to_iopte(phys_addr_t paddr, int lvl,
pte |= ARM_V7S_ATTR_MTK_PA_BIT32;
if (paddr & BIT_ULL(33))
pte |= ARM_V7S_ATTR_MTK_PA_BIT33;
if (paddr & BIT_ULL(34))
pte |= ARM_V7S_ATTR_MTK_PA_BIT34;
return pte;
}
@ -218,6 +221,8 @@ static phys_addr_t iopte_to_paddr(arm_v7s_iopte pte, int lvl,
paddr |= BIT_ULL(32);
if (pte & ARM_V7S_ATTR_MTK_PA_BIT33)
paddr |= BIT_ULL(33);
if (pte & ARM_V7S_ATTR_MTK_PA_BIT34)
paddr |= BIT_ULL(34);
return paddr;
}
@ -748,7 +753,7 @@ static struct io_pgtable *arm_v7s_alloc_pgtable(struct io_pgtable_cfg *cfg,
if (cfg->ias > ARM_V7S_ADDR_BITS)
return NULL;
if (cfg->oas > (arm_v7s_is_mtk_enabled(cfg) ? 34 : ARM_V7S_ADDR_BITS))
if (cfg->oas > (arm_v7s_is_mtk_enabled(cfg) ? 35 : ARM_V7S_ADDR_BITS))
return NULL;
if (cfg->quirks & ~(IO_PGTABLE_QUIRK_ARM_NS |

2
drivers/iommu/mtk_iommu.c
View file

@ -300,7 +300,7 @@ static int mtk_iommu_domain_finalise(struct mtk_iommu_domain *dom)
IO_PGTABLE_QUIRK_ARM_MTK_EXT,
.pgsize_bitmap = mtk_iommu_ops.pgsize_bitmap,
.ias = 32,
.oas = 34,
.oas = 35,
.iommu_dev = data->dev,
};

4
include/linux/io-pgtable.h
View file

@ -69,8 +69,8 @@ struct io_pgtable_cfg {
* format, and/or requires some format-specific default value.
*
* IO_PGTABLE_QUIRK_ARM_MTK_EXT: (ARM v7s format) MediaTek IOMMUs extend
* to support up to 34 bits PA where the bit32 and bit33 are
* encoded in the bit9 and bit4 of the PTE respectively.
* to support up to 35 bits PA where the bit32, bit33 and bit34 are
* encoded in the bit9, bit4 and bit5 of the PTE respectively.
*
* IO_PGTABLE_QUIRK_NON_STRICT: Skip issuing synchronous leaf TLBIs
* on unmap, for DMA domains using the flush queue mechanism for