[PATCH v4 20/24] iommu/arm-smmu-v3: Introduce arm_smmu_cmdq_batch_issue() wrapper

[Nicolin Chen]

Both arm_smmu_cmdq_batch_submit() and arm_smmu_cmdq_batch_add_cmd_p() call
arm_smmu_cmdq_issue_cmdlist() to flush batches. A future change will retry
the issued commands on -EIO, using the arm_smmu_invs carried in the batch.
So, a single hook point is preferred.

Introduce an arm_smmu_cmdq_batch_issue() wrapper, so a retry logic will be
simply filled into the wrapper.

No functional changes.

Assisted-by: Claude:claude-opus-4-7
Signed-off-by: Nicolin Chen <nicolinc at nvidia.com>
---
 drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 17 +++++++++++------
 1 file changed, 11 insertions(+), 6 deletions(-)

diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
index a31f8b1a94979..4f2b23b1e8163 100644
--- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
+++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
@@ -901,6 +901,14 @@ static void arm_smmu_cmdq_batch_init_cmd(struct arm_smmu_device *smmu,
 	cmds->has_ats = false;
 }
 
+static int arm_smmu_cmdq_batch_issue(struct arm_smmu_device *smmu,
+				     struct arm_smmu_cmdq_batch *cmds,
+				     bool sync)
+{
+	return arm_smmu_cmdq_issue_cmdlist(smmu, cmds->cmdq, cmds->cmds,
+					   cmds->num, sync);
+}
+
 static void arm_smmu_cmdq_batch_add_cmd_p(struct arm_smmu_device *smmu,
 					  struct arm_smmu_cmdq_batch *cmds,
 					  struct arm_smmu_cmd *cmd)
@@ -911,14 +919,12 @@ static void arm_smmu_cmdq_batch_add_cmd_p(struct arm_smmu_device *smmu,
 
 	unsupported_cmd = !arm_smmu_cmdq_supports_cmd(cmds->cmdq, cmd);
 	if (force_sync || unsupported_cmd) {
-		arm_smmu_cmdq_issue_cmdlist(smmu, cmds->cmdq, cmds->cmds,
-					    cmds->num, true);
+		arm_smmu_cmdq_batch_issue(smmu, cmds, true);
 		arm_smmu_cmdq_batch_init_cmd(smmu, cmds, cmd, cmds->invs);
 	}
 
 	if (cmds->num == CMDQ_BATCH_ENTRIES) {
-		arm_smmu_cmdq_issue_cmdlist(smmu, cmds->cmdq, cmds->cmds,
-					    cmds->num, false);
+		arm_smmu_cmdq_batch_issue(smmu, cmds, false);
 		arm_smmu_cmdq_batch_init_cmd(smmu, cmds, cmd, cmds->invs);
 	}
 
@@ -936,8 +942,7 @@ static void arm_smmu_cmdq_batch_add_cmd_p(struct arm_smmu_device *smmu,
 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->cmdq, cmds->cmds,
-					   cmds->num, true);
+	return arm_smmu_cmdq_batch_issue(smmu, cmds, true);
 }
 
 static void arm_smmu_page_response(struct device *dev, struct iopf_fault *unused,
-- 
2.43.0