Merge patch series "UFS patches for kernel 6.11"

Bart Van Assche <bvanassche@acm.org> says:

Hi Martin,

Please consider this series of UFS driver patches for the next merge window.

Thank you,

Bart.

Link: https://lore.kernel.org/r/20240708211716.2827751-1-bvanassche@acm.org
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/ufs/core/ufs-mcq.c

@@ -137,20 +137,28 @@ EXPORT_SYMBOL_GPL(ufshcd_mcq_queue_cfg_addr);
  *
  * MAC - Max. Active Command of the Host Controller (HC)
  * HC wouldn't send more than this commands to the device.
- * It is mandatory to implement get_hba_mac() to enable MCQ mode.
  * Calculates and adjusts the queue depth based on the depth
  * supported by the HC and ufs device.
  */
 int ufshcd_mcq_decide_queue_depth(struct ufs_hba *hba)
 {
 	int mac;
 
-	/* Mandatory to implement get_hba_mac() */
-	mac = ufshcd_mcq_vops_get_hba_mac(hba);
-	if (mac < 0) {
-		dev_err(hba->dev, "Failed to get mac, err=%d\n", mac);
-		return mac;
+	if (!hba->vops || !hba->vops->get_hba_mac) {
+		/*
+		 * Extract the maximum number of active transfer tasks value
+		 * from the host controller capabilities register. This value is
+		 * 0-based.
+		 */
+		hba->capabilities =
+			ufshcd_readl(hba, REG_CONTROLLER_CAPABILITIES);
+		mac = hba->capabilities & MASK_TRANSFER_REQUESTS_SLOTS_MCQ;
+		mac++;
+	} else {
+		mac = hba->vops->get_hba_mac(hba);
 	}
+	if (mac < 0)
+		goto err;
 
 	WARN_ON_ONCE(!hba->dev_info.bqueuedepth);
 	/*
@@ -159,6 +167,10 @@ int ufshcd_mcq_decide_queue_depth(struct ufs_hba *hba)
 	 * shared queuing architecture is enabled.
 	 */
 	return min_t(int, mac, hba->dev_info.bqueuedepth);
+
+err:
+	dev_err(hba->dev, "Failed to get mac, err=%d\n", mac);
+	return mac;
 }
 
 static int ufshcd_mcq_config_nr_queues(struct ufs_hba *hba)
@@ -415,9 +427,16 @@ EXPORT_SYMBOL_GPL(ufshcd_mcq_enable_esi);
 void ufshcd_mcq_enable(struct ufs_hba *hba)
 {
 	ufshcd_rmwl(hba, MCQ_MODE_SELECT, MCQ_MODE_SELECT, REG_UFS_MEM_CFG);
+	hba->mcq_enabled = true;
 }
 EXPORT_SYMBOL_GPL(ufshcd_mcq_enable);
 
+void ufshcd_mcq_disable(struct ufs_hba *hba)
+{
+	ufshcd_rmwl(hba, MCQ_MODE_SELECT, 0, REG_UFS_MEM_CFG);
+	hba->mcq_enabled = false;
+}
+
 void ufshcd_mcq_config_esi(struct ufs_hba *hba, struct msi_msg *msg)
 {
 	ufshcd_writel(hba, msg->address_lo, REG_UFS_ESILBA);

drivers/ufs/core/ufshcd-priv.h

@@ -64,16 +64,11 @@ void ufshcd_auto_hibern8_update(struct ufs_hba *hba, u32 ahit);
 void ufshcd_compl_one_cqe(struct ufs_hba *hba, int task_tag,
 			  struct cq_entry *cqe);
 int ufshcd_mcq_init(struct ufs_hba *hba);
+void ufshcd_mcq_disable(struct ufs_hba *hba);
 int ufshcd_mcq_decide_queue_depth(struct ufs_hba *hba);
 int ufshcd_mcq_memory_alloc(struct ufs_hba *hba);
-void ufshcd_mcq_make_queues_operational(struct ufs_hba *hba);
-void ufshcd_mcq_config_mac(struct ufs_hba *hba, u32 max_active_cmds);
-u32 ufshcd_mcq_read_cqis(struct ufs_hba *hba, int i);
-void ufshcd_mcq_write_cqis(struct ufs_hba *hba, u32 val, int i);
 struct ufs_hw_queue *ufshcd_mcq_req_to_hwq(struct ufs_hba *hba,
 					   struct request *req);
-unsigned long ufshcd_mcq_poll_cqe_lock(struct ufs_hba *hba,
-				       struct ufs_hw_queue *hwq);
 void ufshcd_mcq_compl_all_cqes_lock(struct ufs_hba *hba,
 				    struct ufs_hw_queue *hwq);
 bool ufshcd_cmd_inflight(struct scsi_cmnd *cmd);
@@ -255,14 +250,6 @@ static inline int ufshcd_vops_mcq_config_resource(struct ufs_hba *hba)
 	return -EOPNOTSUPP;
 }
 
-static inline int ufshcd_mcq_vops_get_hba_mac(struct ufs_hba *hba)
-{
-	if (hba->vops && hba->vops->get_hba_mac)
-		return hba->vops->get_hba_mac(hba);
-
-	return -EOPNOTSUPP;
-}
-
 static inline int ufshcd_mcq_vops_op_runtime_config(struct ufs_hba *hba)
 {
 	if (hba->vops && hba->vops->op_runtime_config)