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AJvYcCXUeu+/Q5Xu6NWjUaLPRHAiuJxWAFSQeYwUdE5E9LuIro13EVGaHfNqIb1bREmvFBPpCVlceSyY6ctTw0ZEcfeR@lists.infradead.org X-Gm-Message-State: AOJu0YwZ7qAvlMaWvwNB1Xiqqb7e3vOZ3IHk4+xalflLFHvIpD6rnYdX vyZJ5fGTR3KtqV0Xj+f37T4QNHGOhjgAsIHyVw0sW5isF9RCSZbN X-Google-Smtp-Source: AGHT+IGN8V4SYWFCRpzsemtnMPx/Ae6udueJVGLrFDaSeEfYPszwWWE/tbOvS5tDdOuR5xJpXoGzfQ== X-Received: by 2002:a05:6a20:6f87:b0:1c4:dfa7:d3ce with SMTP id adf61e73a8af0-1cad7f954b6mr103988637.17.1724174229744; Tue, 20 Aug 2024 10:17:09 -0700 (PDT) Received: from localhost ([2a00:79e1:abd:bd02:d0ce:e791:dc08:a375]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-201f0379031sm80590295ad.159.2024.08.20.10.17.08 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 20 Aug 2024 10:17:09 -0700 (PDT) From: Rob Clark To: iommu@lists.linux.dev Cc: linux-arm-msm@vger.kernel.org, freedreno@lists.freedesktop.org, Mostafa Saleh , Will Deacon , Rob Clark , Robin Murphy , Joerg Roedel , linux-arm-kernel@lists.infradead.org (moderated list:ARM SMMU DRIVERS), linux-kernel@vger.kernel.org (open list) Subject: [PATCH v7 1/4] iommu/io-pgtable-arm: Make pgtable walker more generic Date: Tue, 20 Aug 2024 10:16:44 -0700 Message-ID: <20240820171652.145673-2-robdclark@gmail.com> X-Mailer: git-send-email 2.46.0 In-Reply-To: <20240820171652.145673-1-robdclark@gmail.com> References: <20240820171652.145673-1-robdclark@gmail.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240820_101711_025240_99F6C5E5 X-CRM114-Status: GOOD ( 14.85 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Rob Clark We can re-use this basic pgtable walk logic in a few places. Signed-off-by: Rob Clark --- drivers/iommu/io-pgtable-arm.c | 59 +++++++++++++++++++++------------- 1 file changed, 36 insertions(+), 23 deletions(-) diff --git a/drivers/iommu/io-pgtable-arm.c b/drivers/iommu/io-pgtable-arm.c index f5d9fd1f45bf..b4bc358740e0 100644 --- a/drivers/iommu/io-pgtable-arm.c +++ b/drivers/iommu/io-pgtable-arm.c @@ -747,33 +747,31 @@ static phys_addr_t arm_lpae_iova_to_phys(struct io_pgtable_ops *ops, } struct io_pgtable_walk_data { - struct iommu_dirty_bitmap *dirty; + void *data; + int (*visit)(struct io_pgtable_walk_data *walk_data, int lvl, + arm_lpae_iopte pte, size_t size); unsigned long flags; u64 addr; const u64 end; }; -static int __arm_lpae_iopte_walk_dirty(struct arm_lpae_io_pgtable *data, - struct io_pgtable_walk_data *walk_data, - arm_lpae_iopte *ptep, - int lvl); +static int __arm_lpae_iopte_walk(struct arm_lpae_io_pgtable *data, + struct io_pgtable_walk_data *walk_data, + arm_lpae_iopte *ptep, + int lvl); -static int io_pgtable_visit_dirty(struct arm_lpae_io_pgtable *data, - struct io_pgtable_walk_data *walk_data, - arm_lpae_iopte *ptep, int lvl) +static int io_pgtable_visit(struct arm_lpae_io_pgtable *data, + struct io_pgtable_walk_data *walk_data, + arm_lpae_iopte *ptep, int lvl) { struct io_pgtable *iop = &data->iop; arm_lpae_iopte pte = READ_ONCE(*ptep); if (iopte_leaf(pte, lvl, iop->fmt)) { size_t size = ARM_LPAE_BLOCK_SIZE(lvl, data); - - if (iopte_writeable_dirty(pte)) { - iommu_dirty_bitmap_record(walk_data->dirty, - walk_data->addr, size); - if (!(walk_data->flags & IOMMU_DIRTY_NO_CLEAR)) - iopte_set_writeable_clean(ptep); - } + int ret = walk_data->visit(walk_data, lvl, pte, size); + if (ret) + return ret; walk_data->addr += size; return 0; } @@ -782,13 +780,13 @@ static int io_pgtable_visit_dirty(struct arm_lpae_io_pgtable *data, return -EINVAL; ptep = iopte_deref(pte, data); - return __arm_lpae_iopte_walk_dirty(data, walk_data, ptep, lvl + 1); + return __arm_lpae_iopte_walk(data, walk_data, ptep, lvl + 1); } -static int __arm_lpae_iopte_walk_dirty(struct arm_lpae_io_pgtable *data, - struct io_pgtable_walk_data *walk_data, - arm_lpae_iopte *ptep, - int lvl) +static int __arm_lpae_iopte_walk(struct arm_lpae_io_pgtable *data, + struct io_pgtable_walk_data *walk_data, + arm_lpae_iopte *ptep, + int lvl) { u32 idx; int max_entries, ret; @@ -803,7 +801,7 @@ static int __arm_lpae_iopte_walk_dirty(struct arm_lpae_io_pgtable *data, for (idx = ARM_LPAE_LVL_IDX(walk_data->addr, lvl, data); (idx < max_entries) && (walk_data->addr < walk_data->end); ++idx) { - ret = io_pgtable_visit_dirty(data, walk_data, ptep + idx, lvl); + ret = io_pgtable_visit(data, walk_data, ptep + idx, lvl); if (ret) return ret; } @@ -811,6 +809,20 @@ static int __arm_lpae_iopte_walk_dirty(struct arm_lpae_io_pgtable *data, return 0; } +static int visit_dirty(struct io_pgtable_walk_data *walk_data, int lvl, + arm_lpae_iopte pte, size_t size) +{ + struct iommu_dirty_bitmap *dirty = walk_data->data; + + if (iopte_writeable_dirty(pte)) { + iommu_dirty_bitmap_record(dirty, walk_data->addr, size); + if (!(walk_data->flags & IOMMU_DIRTY_NO_CLEAR)) + iopte_set_writeable_clean(&pte); + } + + return 0; +} + static int arm_lpae_read_and_clear_dirty(struct io_pgtable_ops *ops, unsigned long iova, size_t size, unsigned long flags, @@ -819,7 +831,8 @@ static int arm_lpae_read_and_clear_dirty(struct io_pgtable_ops *ops, struct arm_lpae_io_pgtable *data = io_pgtable_ops_to_data(ops); struct io_pgtable_cfg *cfg = &data->iop.cfg; struct io_pgtable_walk_data walk_data = { - .dirty = dirty, + .data = dirty, + .visit = visit_dirty, .flags = flags, .addr = iova, .end = iova + size, @@ -834,7 +847,7 @@ static int arm_lpae_read_and_clear_dirty(struct io_pgtable_ops *ops, if (data->iop.fmt != ARM_64_LPAE_S1) return -EINVAL; - return __arm_lpae_iopte_walk_dirty(data, &walk_data, ptep, lvl); + return __arm_lpae_iopte_walk(data, &walk_data, ptep, lvl); } static void arm_lpae_restrict_pgsizes(struct io_pgtable_cfg *cfg)