diff options
| author | Jean-Philippe Brucker <jean-philippe@linaro.org> | 2020-02-24 19:58:44 +0300 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2020-03-19 00:32:25 +0300 |
| commit | 4ce8da453640147101bda418640394637c1a7cfc (patch) | |
| tree | a77025592e96140be98fc9399bb7b10e1e99eb87 /drivers/iommu | |
| parent | 87e5fe5b779a20fa02382aaf169015e68710b9ff (diff) | |
| download | linux-4ce8da453640147101bda418640394637c1a7cfc.tar.xz | |
iommu/arm-smmu-v3: Add command queue batching helpers
As more functions will implement command queue batching, add two helpers
to simplify building a command list.
Signed-off-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/arm-smmu-v3.c | 37 |
1 files changed, 26 insertions, 11 deletions
diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c index 068a16d0eabe..beeec366bc41 100644 --- a/drivers/iommu/arm-smmu-v3.c +++ b/drivers/iommu/arm-smmu-v3.c @@ -548,6 +548,11 @@ struct arm_smmu_cmdq { atomic_t lock; }; +struct arm_smmu_cmdq_batch { + u64 cmds[CMDQ_BATCH_ENTRIES * CMDQ_ENT_DWORDS]; + int num; +}; + struct arm_smmu_evtq { struct arm_smmu_queue q; u32 max_stalls; @@ -1482,6 +1487,24 @@ static int arm_smmu_cmdq_issue_sync(struct arm_smmu_device *smmu) return arm_smmu_cmdq_issue_cmdlist(smmu, NULL, 0, true); } +static void arm_smmu_cmdq_batch_add(struct arm_smmu_device *smmu, + struct arm_smmu_cmdq_batch *cmds, + struct arm_smmu_cmdq_ent *cmd) +{ + if (cmds->num == CMDQ_BATCH_ENTRIES) { + arm_smmu_cmdq_issue_cmdlist(smmu, cmds->cmds, cmds->num, false); + cmds->num = 0; + } + arm_smmu_cmdq_build_cmd(&cmds->cmds[cmds->num * CMDQ_ENT_DWORDS], cmd); + cmds->num++; +} + +static int arm_smmu_cmdq_batch_submit(struct arm_smmu_device *smmu, + struct arm_smmu_cmdq_batch *cmds) +{ + return arm_smmu_cmdq_issue_cmdlist(smmu, cmds->cmds, cmds->num, true); +} + /* Context descriptor manipulation functions */ static void arm_smmu_sync_cd(struct arm_smmu_domain *smmu_domain, int ssid, bool leaf) @@ -2220,10 +2243,9 @@ static void arm_smmu_tlb_inv_range(unsigned long iova, size_t size, size_t granule, bool leaf, struct arm_smmu_domain *smmu_domain) { - u64 cmds[CMDQ_BATCH_ENTRIES * CMDQ_ENT_DWORDS]; struct arm_smmu_device *smmu = smmu_domain->smmu; unsigned long start = iova, end = iova + size; - int i = 0; + struct arm_smmu_cmdq_batch cmds = {}; struct arm_smmu_cmdq_ent cmd = { .tlbi = { .leaf = leaf, @@ -2242,18 +2264,11 @@ static void arm_smmu_tlb_inv_range(unsigned long iova, size_t size, } while (iova < end) { - if (i == CMDQ_BATCH_ENTRIES) { - arm_smmu_cmdq_issue_cmdlist(smmu, cmds, i, false); - i = 0; - } - cmd.tlbi.addr = iova; - arm_smmu_cmdq_build_cmd(&cmds[i * CMDQ_ENT_DWORDS], &cmd); + arm_smmu_cmdq_batch_add(smmu, &cmds, &cmd); iova += granule; - i++; } - - arm_smmu_cmdq_issue_cmdlist(smmu, cmds, i, true); + arm_smmu_cmdq_batch_submit(smmu, &cmds); /* * Unfortunately, this can't be leaf-only since we may have |