From: Yong Wu <yong.wu@mediatek.com> To: Joerg Roedel <joro@8bytes.org>, Matthias Brugger <matthias.bgg@gmail.com>, Robin Murphy <robin.murphy@arm.com>, Will Deacon <will@kernel.org> Cc: youlin.pei@mediatek.com, devicetree@vger.kernel.org, Nicolas Boichat <drinkcat@chromium.org>, cui.zhang@mediatek.com, srv_heupstream@mediatek.com, chao.hao@mediatek.com, linux-kernel@vger.kernel.org, Evan Green <evgreen@chromium.org>, Tomasz Figa <tfiga@google.com>, iommu@lists.linux-foundation.org, Rob Herring <robh+dt@kernel.org>, linux-mediatek@lists.infradead.org, yong.wu@mediatek.com, ming-fan.chen@mediatek.com, anan.sun@mediatek.com, Matthias Kaehlcke <mka@chromium.org>, linux-arm-kernel@lists.infradead.org Subject: [PATCH v9 05/21] iommu/io-pgtable-arm-v7s: Add paddr_to_iopte and iopte_to_paddr helpers Date: Sat, 10 Aug 2019 15:58:05 +0800 Message-ID: <1565423901-17008-6-git-send-email-yong.wu@mediatek.com> (raw) In-Reply-To: <1565423901-17008-1-git-send-email-yong.wu@mediatek.com> Add two helper functions: paddr_to_iopte and iopte_to_paddr. Signed-off-by: Yong Wu <yong.wu@mediatek.com> Reviewed-by: Robin Murphy <robin.murphy@arm.com> Reviewed-by: Evan Green <evgreen@chromium.org> --- drivers/iommu/io-pgtable-arm-v7s.c | 45 ++++++++++++++++++++++++++++---------- 1 file changed, 33 insertions(+), 12 deletions(-) diff --git a/drivers/iommu/io-pgtable-arm-v7s.c b/drivers/iommu/io-pgtable-arm-v7s.c index 0fc8dfa..72f1880 100644 --- a/drivers/iommu/io-pgtable-arm-v7s.c +++ b/drivers/iommu/io-pgtable-arm-v7s.c @@ -169,18 +169,38 @@ struct arm_v7s_io_pgtable { spinlock_t split_lock; }; +static bool arm_v7s_pte_is_cont(arm_v7s_iopte pte, int lvl); + static dma_addr_t __arm_v7s_dma_addr(void *pages) { return (dma_addr_t)virt_to_phys(pages); } -static arm_v7s_iopte *iopte_deref(arm_v7s_iopte pte, int lvl) +static arm_v7s_iopte paddr_to_iopte(phys_addr_t paddr, int lvl, + struct io_pgtable_cfg *cfg) { + return paddr & ARM_V7S_LVL_MASK(lvl); +} + +static phys_addr_t iopte_to_paddr(arm_v7s_iopte pte, int lvl, + struct io_pgtable_cfg *cfg) +{ + arm_v7s_iopte mask; + if (ARM_V7S_PTE_IS_TABLE(pte, lvl)) - pte &= ARM_V7S_TABLE_MASK; + mask = ARM_V7S_TABLE_MASK; + else if (arm_v7s_pte_is_cont(pte, lvl)) + mask = ARM_V7S_LVL_MASK(lvl) * ARM_V7S_CONT_PAGES; else - pte &= ARM_V7S_LVL_MASK(lvl); - return phys_to_virt(pte); + mask = ARM_V7S_LVL_MASK(lvl); + + return pte & mask; +} + +static arm_v7s_iopte *iopte_deref(arm_v7s_iopte pte, int lvl, + struct arm_v7s_io_pgtable *data) +{ + return phys_to_virt(iopte_to_paddr(pte, lvl, &data->iop.cfg)); } static void *__arm_v7s_alloc_table(int lvl, gfp_t gfp, @@ -396,7 +416,7 @@ static int arm_v7s_init_pte(struct arm_v7s_io_pgtable *data, if (num_entries > 1) pte = arm_v7s_pte_to_cont(pte, lvl); - pte |= paddr & ARM_V7S_LVL_MASK(lvl); + pte |= paddr_to_iopte(paddr, lvl, cfg); __arm_v7s_set_pte(ptep, pte, num_entries, cfg); return 0; @@ -462,7 +482,7 @@ static int __arm_v7s_map(struct arm_v7s_io_pgtable *data, unsigned long iova, } if (ARM_V7S_PTE_IS_TABLE(pte, lvl)) { - cptep = iopte_deref(pte, lvl); + cptep = iopte_deref(pte, lvl, data); } else if (pte) { /* We require an unmap first */ WARN_ON(!selftest_running); @@ -512,7 +532,8 @@ static void arm_v7s_free_pgtable(struct io_pgtable *iop) arm_v7s_iopte pte = data->pgd[i]; if (ARM_V7S_PTE_IS_TABLE(pte, 1)) - __arm_v7s_free_table(iopte_deref(pte, 1), 2, data); + __arm_v7s_free_table(iopte_deref(pte, 1, data), + 2, data); } __arm_v7s_free_table(data->pgd, 1, data); kmem_cache_destroy(data->l2_tables); @@ -582,7 +603,7 @@ static size_t arm_v7s_split_blk_unmap(struct arm_v7s_io_pgtable *data, if (!ARM_V7S_PTE_IS_TABLE(pte, 1)) return 0; - tablep = iopte_deref(pte, 1); + tablep = iopte_deref(pte, 1, data); return __arm_v7s_unmap(data, iova, size, 2, tablep); } @@ -641,7 +662,7 @@ static size_t __arm_v7s_unmap(struct arm_v7s_io_pgtable *data, io_pgtable_tlb_add_flush(iop, iova, blk_size, ARM_V7S_BLOCK_SIZE(lvl + 1), false); io_pgtable_tlb_sync(iop); - ptep = iopte_deref(pte[i], lvl); + ptep = iopte_deref(pte[i], lvl, data); __arm_v7s_free_table(ptep, lvl + 1, data); } else if (iop->cfg.quirks & IO_PGTABLE_QUIRK_NON_STRICT) { /* @@ -666,7 +687,7 @@ static size_t __arm_v7s_unmap(struct arm_v7s_io_pgtable *data, } /* Keep on walkin' */ - ptep = iopte_deref(pte[0], lvl); + ptep = iopte_deref(pte[0], lvl, data); return __arm_v7s_unmap(data, iova, size, lvl + 1, ptep); } @@ -692,7 +713,7 @@ static phys_addr_t arm_v7s_iova_to_phys(struct io_pgtable_ops *ops, do { ptep += ARM_V7S_LVL_IDX(iova, ++lvl); pte = READ_ONCE(*ptep); - ptep = iopte_deref(pte, lvl); + ptep = iopte_deref(pte, lvl, data); } while (ARM_V7S_PTE_IS_TABLE(pte, lvl)); if (!ARM_V7S_PTE_IS_VALID(pte)) @@ -701,7 +722,7 @@ static phys_addr_t arm_v7s_iova_to_phys(struct io_pgtable_ops *ops, mask = ARM_V7S_LVL_MASK(lvl); if (arm_v7s_pte_is_cont(pte, lvl)) mask *= ARM_V7S_CONT_PAGES; - return (pte & mask) | (iova & ~mask); + return iopte_to_paddr(pte, lvl, &data->iop.cfg) | (iova & ~mask); } static struct io_pgtable *arm_v7s_alloc_pgtable(struct io_pgtable_cfg *cfg, -- 1.9.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply index Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-08-10 7:58 [PATCH v9 00/21] MT8183 IOMMU SUPPORT Yong Wu 2019-08-10 7:58 ` [PATCH v9 01/21] dt-bindings: mediatek: Add binding for mt8183 IOMMU and SMI Yong Wu 2019-08-10 7:58 ` [PATCH v9 02/21] iommu/mediatek: Use a struct as the platform data Yong Wu 2019-08-10 7:58 ` [PATCH v9 03/21] memory: mtk-smi: Use a general config_port interface Yong Wu 2019-08-10 7:58 ` [PATCH v9 04/21] memory: mtk-smi: Use a struct for the platform data for smi-common Yong Wu 2019-08-10 7:58 ` Yong Wu [this message] 2019-08-10 7:58 ` [PATCH v9 06/21] iommu/io-pgtable-arm-v7s: Use ias/oas to check the valid iova/pa Yong Wu 2019-08-10 7:58 ` [PATCH v9 07/21] iommu/io-pgtable-arm-v7s: Rename the quirk from MTK_4GB to MTK_EXT Yong Wu 2019-08-10 7:58 ` [PATCH v9 08/21] iommu/io-pgtable-arm-v7s: Extend MediaTek 4GB Mode Yong Wu 2019-08-14 14:41 ` Will Deacon 2019-08-15 8:47 ` Yong Wu 2019-08-15 9:51 ` Will Deacon 2019-08-15 10:03 ` Yong Wu 2019-08-15 10:04 ` Will Deacon 2019-08-15 10:18 ` Yong Wu 2019-08-15 11:50 ` Will Deacon 2019-08-16 7:22 ` Yong Wu 2019-08-19 11:24 ` Will Deacon 2019-08-10 7:58 ` [PATCH v9 09/21] iommu/mediatek: Add bclk can be supported optionally Yong Wu 2019-08-10 7:58 ` [PATCH v9 10/21] iommu/mediatek: Add larb-id remapped support Yong Wu 2019-08-10 7:58 ` [PATCH v9 11/21] iommu/mediatek: Refine protect memory definition Yong Wu 2019-08-10 7:58 ` [PATCH v9 12/21] iommu/mediatek: Move reset_axi into plat_data Yong Wu 2019-08-10 7:58 ` [PATCH v9 13/21] iommu/mediatek: Move vld_pa_rng " Yong Wu 2019-08-10 7:58 ` [PATCH v9 14/21] memory: mtk-smi: Add gals support Yong Wu 2019-08-10 7:58 ` [PATCH v9 15/21] iommu/mediatek: Add mt8183 IOMMU support Yong Wu 2019-08-10 7:58 ` [PATCH v9 16/21] iommu/mediatek: Add mmu1 support Yong Wu 2019-08-10 7:58 ` [PATCH v9 17/21] memory: mtk-smi: Invoke pm runtime_callback to enable clocks Yong Wu 2019-08-10 7:58 ` [PATCH v9 18/21] memory: mtk-smi: Add bus_sel for mt8183 Yong Wu 2019-08-10 7:58 ` [PATCH v9 19/21] iommu/mediatek: Fix VLD_PA_RNG register backup when suspend Yong Wu 2019-08-10 7:58 ` [PATCH v9 20/21] memory: mtk-smi: Get rid of need_larbid Yong Wu 2019-08-10 7:58 ` [PATCH v9 21/21] iommu/mediatek: Clean up struct mtk_smi_iommu Yong Wu 2019-08-14 8:18 ` [PATCH v9 00/21] MT8183 IOMMU SUPPORT Joerg Roedel 2019-08-14 8:24 ` Will Deacon
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