Merge patch series "UFS core patches"

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

Hi Martin,

Please consider these UFS core patches for the next merge window.

Thanks,

Bart.

Link: https://lore.kernel.org/r/20230921192335.676924-1-bvanassche@acm.org
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Author: martinkpetersen

drivers/ufs/core/ufshcd.c

@@ -2715,27 +2715,23 @@ static int ufshcd_compose_devman_upiu(struct ufs_hba *hba,
  *			   for SCSI Purposes
  * @hba: per adapter instance
  * @lrbp: pointer to local reference block
- *
- * Return: 0 upon success; < 0 upon failure.
  */
-static int ufshcd_comp_scsi_upiu(struct ufs_hba *hba, struct ufshcd_lrb *lrbp)
+static void ufshcd_comp_scsi_upiu(struct ufs_hba *hba, struct ufshcd_lrb *lrbp)
 {
+	struct request *rq = scsi_cmd_to_rq(lrbp->cmd);
+	unsigned int ioprio_class = IOPRIO_PRIO_CLASS(req_get_ioprio(rq));
 	u8 upiu_flags;
-	int ret = 0;
 
 	if (hba->ufs_version <= ufshci_version(1, 1))
 		lrbp->command_type = UTP_CMD_TYPE_SCSI;
 	else
 		lrbp->command_type = UTP_CMD_TYPE_UFS_STORAGE;
 
-	if (likely(lrbp->cmd)) {
-		ufshcd_prepare_req_desc_hdr(lrbp, &upiu_flags, lrbp->cmd->sc_data_direction, 0);
-		ufshcd_prepare_utp_scsi_cmd_upiu(lrbp, upiu_flags);
-	} else {
-		ret = -EINVAL;
-	}
-
-	return ret;
+	ufshcd_prepare_req_desc_hdr(lrbp, &upiu_flags,
+				    lrbp->cmd->sc_data_direction, 0);
+	if (ioprio_class == IOPRIO_CLASS_RT)
+		upiu_flags |= UPIU_CMD_FLAGS_CP;
+	ufshcd_prepare_utp_scsi_cmd_upiu(lrbp, upiu_flags);
 }
 
 /**
@@ -2823,8 +2819,6 @@ static int ufshcd_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmd)
 	int err = 0;
 	struct ufs_hw_queue *hwq = NULL;
 
-	WARN_ONCE(tag < 0 || tag >= hba->nutrs, "Invalid tag %d\n", tag);
-
 	switch (hba->ufshcd_state) {
 	case UFSHCD_STATE_OPERATIONAL:
 		break;
@@ -5098,8 +5092,7 @@ static int ufshcd_slave_configure(struct scsi_device *sdev)
 	struct request_queue *q = sdev->request_queue;
 
 	blk_queue_update_dma_pad(q, PRDT_DATA_BYTE_COUNT_PAD - 1);
-	if (hba->quirks & UFSHCD_QUIRK_4KB_DMA_ALIGNMENT)
-		blk_queue_update_dma_alignment(q, SZ_4K - 1);
+
 	/*
 	 * Block runtime-pm until all consumers are added.
 	 * Refer ufshcd_setup_links().
@@ -5115,6 +5108,9 @@ static int ufshcd_slave_configure(struct scsi_device *sdev)
 	 */
 	sdev->silence_suspend = 1;
 
+	if (hba->vops && hba->vops->config_scsi_dev)
+		hba->vops->config_scsi_dev(sdev);
+
 	ufshcd_crypto_register(hba, q);
 
 	return 0;
@@ -6924,8 +6920,6 @@ static int __ufshcd_issue_tm_cmd(struct ufs_hba *hba,
 	spin_lock_irqsave(host->host_lock, flags);
 
 	task_tag = req->tag;
-	WARN_ONCE(task_tag < 0 || task_tag >= hba->nutmrs, "Invalid tag %d\n",
-		  task_tag);
 	hba->tmf_rqs[req->tag] = req;
 	treq->upiu_req.req_header.task_tag = task_tag;
 
@@ -7499,8 +7493,6 @@ static int ufshcd_abort(struct scsi_cmnd *cmd)
 	bool outstanding;
 	u32 reg;
 
-	WARN_ONCE(tag < 0, "Invalid tag %d\n", tag);
-
 	ufshcd_hold(hba);
 
 	if (!is_mcq_enabled(hba)) {

drivers/ufs/host/ufs-exynos.c

@@ -1511,6 +1511,11 @@ static int fsd_ufs_pre_link(struct exynos_ufs *ufs)
 	return 0;
 }
 
+static void exynos_ufs_config_scsi_dev(struct scsi_device *sdev)
+{
+	blk_queue_update_dma_alignment(sdev->request_queue, SZ_4K - 1);
+}
+
 static int fsd_ufs_post_link(struct exynos_ufs *ufs)
 {
 	int i;
@@ -1579,6 +1584,7 @@ static const struct ufs_hba_variant_ops ufs_hba_exynos_ops = {
 	.hibern8_notify			= exynos_ufs_hibern8_notify,
 	.suspend			= exynos_ufs_suspend,
 	.resume				= exynos_ufs_resume,
+	.config_scsi_dev		= exynos_ufs_config_scsi_dev,
 };
 
 static struct ufs_hba_variant_ops ufs_hba_exynosauto_vh_ops = {
@@ -1678,8 +1684,7 @@ static const struct exynos_ufs_drv_data exynos_ufs_drvs = {
 				  UFSHCI_QUIRK_SKIP_RESET_INTR_AGGR |
 				  UFSHCD_QUIRK_BROKEN_OCS_FATAL_ERROR |
 				  UFSHCI_QUIRK_SKIP_MANUAL_WB_FLUSH_CTRL |
-				  UFSHCD_QUIRK_SKIP_DEF_UNIPRO_TIMEOUT_SETTING |
-				  UFSHCD_QUIRK_4KB_DMA_ALIGNMENT,
+				  UFSHCD_QUIRK_SKIP_DEF_UNIPRO_TIMEOUT_SETTING,
 	.opts			= EXYNOS_UFS_OPT_HAS_APB_CLK_CTRL |
 				  EXYNOS_UFS_OPT_BROKEN_AUTO_CLK_CTRL |
 				  EXYNOS_UFS_OPT_BROKEN_RX_SEL_IDX |

include/ufs/ufs.h

@@ -98,9 +98,10 @@ enum upiu_response_transaction {
 	UPIU_TRANSACTION_REJECT_UPIU	= 0x3F,
 };
 
-/* UPIU Read/Write flags */
+/* UPIU Read/Write flags. See also table "UPIU Flags" in the UFS standard. */
 enum {
 	UPIU_CMD_FLAGS_NONE	= 0x00,
+	UPIU_CMD_FLAGS_CP	= 0x04,
 	UPIU_CMD_FLAGS_WRITE	= 0x20,
 	UPIU_CMD_FLAGS_READ	= 0x40,
 };

include/ufs/ufshcd.h

@@ -28,6 +28,7 @@
 
 #define UFSHCD "ufshcd"
 
+struct scsi_device;
 struct ufs_hba;
 
 enum dev_cmd_type {
@@ -371,6 +372,7 @@ struct ufs_hba_variant_ops {
 	int	(*get_outstanding_cqs)(struct ufs_hba *hba,
 				       unsigned long *ocqs);
 	int	(*config_esi)(struct ufs_hba *hba);
+	void	(*config_scsi_dev)(struct scsi_device *sdev);
 };
 
 /* clock gating state  */
@@ -596,11 +598,6 @@ enum ufshcd_quirks {
 	 */
 	UFSHCD_QUIRK_SKIP_DEF_UNIPRO_TIMEOUT_SETTING = 1 << 13,
 
-	/*
-	 * Align DMA SG entries on a 4 KiB boundary.
-	 */
-	UFSHCD_QUIRK_4KB_DMA_ALIGNMENT			= 1 << 14,
-
 	/*
 	 * This quirk needs to be enabled if the host controller does not
 	 * support UIC command