[PATCH 2/3] scsi: ufs-qcom: Add support for dumping MCQ registers

[Manish Pandey <quic_mapa@quicinc.com>]

This patch adds functionality to dump Multi-Queue (MCQ) registers.
This will help in diagnosing issues related to MCQ operations by
providing detailed register dumps.

Signed-off-by: Manish Pandey <quic_mapa@quicinc.com>
---
 drivers/ufs/host/ufs-qcom.c | 59 +++++++++++++++++++++++++++++++++++++
 drivers/ufs/host/ufs-qcom.h |  2 ++
 2 files changed, 61 insertions(+)

diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c
index 4752311b1f76..a43e818a7e14 100644
--- a/drivers/ufs/host/ufs-qcom.c
+++ b/drivers/ufs/host/ufs-qcom.c
@@ -1480,6 +1480,52 @@ int ufs_qcom_testbus_config(struct ufs_qcom_host *host)
 	return 0;
 }
 
+static void ufs_qcom_dump_mcq_hci_regs(struct ufs_hba *hba)
+{
+	/* RES_MCQ_1 */
+	ufshcd_dump_regs(hba, 0x0, 256 * 4, "MCQ HCI 1da0000-1da03f0 ");
+	usleep_range(1000, 1100);
+
+	/* RES_MCQ_2 */
+	ufshcd_dump_regs(hba, 0x400, 256 * 4, "MCQ HCI 1da0400-1da07f0 ");
+	usleep_range(1000, 1100);
+
+	/*RES_MCQ_VS */
+	ufshcd_dump_regs(hba, 0x0, 5 * 4, "MCQ VS 1da4000-1da4010 ");
+	usleep_range(1000, 1100);
+
+	/* RES_MCQ_SQD_1 */
+	ufshcd_dump_regs(hba, 0x0, 256 * 4, "MCQ SQD 1da5000-1da53f0 ");
+	usleep_range(1000, 1100);
+
+	/* RES_MCQ_SQD_2 */
+	ufshcd_dump_regs(hba, 0x400, 256 * 4, "MCQ SQD 1da5400-1da57f0 ");
+	usleep_range(1000, 1100);
+
+	/* RES_MCQ_SQD_3 */
+	ufshcd_dump_regs(hba, 0x800, 256 * 4, "MCQ SQD 1da5800-1da5bf0 ");
+	usleep_range(1000, 1100);
+
+	/* RES_MCQ_SQD_4 */
+	ufshcd_dump_regs(hba, 0xc00, 256 * 4, "MCQ SQD 1da5c00-1da5ff0 ");
+	usleep_range(1000, 1100);
+
+	/* RES_MCQ_SQD_5 */
+	ufshcd_dump_regs(hba, 0x1000, 256 * 4, "MCQ SQD 1da6000-1da63f0 ");
+	usleep_range(1000, 1100);
+
+	/* RES_MCQ_SQD_6 */
+	ufshcd_dump_regs(hba, 0x1400, 256 * 4, "MCQ SQD 1da6400-1da67f0 ");
+	usleep_range(1000, 1100);
+
+	/* RES_MCQ_SQD_7 */
+	ufshcd_dump_regs(hba, 0x1800, 256 * 4, "MCQ SQD 1da6800-1da6bf0 ");
+	usleep_range(1000, 1100);
+
+	/* RES_MCQ_SQD_8 */
+	ufshcd_dump_regs(hba, 0x1c00, 256 * 4, "MCQ SQD 1da6c00-1da6ff0 ");
+}
+
 static void ufs_qcom_dump_dbg_regs(struct ufs_hba *hba)
 {
 	u32 reg;
@@ -1538,6 +1584,19 @@ static void ufs_qcom_dump_dbg_regs(struct ufs_hba *hba)
 
 	reg = ufs_qcom_get_debug_reg_offset(host, UFS_DBG_RD_REG_TMRLUT);
 	ufshcd_dump_regs(hba, reg, 9 * 4, "UFS_DBG_RD_REG_TMRLUT ");
+
+	if (hba->mcq_enabled) {
+		reg = ufs_qcom_get_debug_reg_offset(host, UFS_RD_REG_MCQ);
+		ufshcd_dump_regs(hba, reg, 64 * 4, "HCI MCQ Debug Registers ");
+	}
+
+	if (in_task()) {
+		/* Dump MCQ Host Vendor Specific Registers */
+		if (hba->mcq_enabled) {
+			ufs_qcom_dump_mcq_hci_regs(hba);
+			usleep_range(1000, 1100);
+		}
+	}
 }
 
 /**
diff --git a/drivers/ufs/host/ufs-qcom.h b/drivers/ufs/host/ufs-qcom.h
index 84e42fa123d2..980af902bab5 100644
--- a/drivers/ufs/host/ufs-qcom.h
+++ b/drivers/ufs/host/ufs-qcom.h
@@ -50,6 +50,8 @@ enum {
 	 */
 	UFS_AH8_CFG				= 0xFC,
 
+	UFS_RD_REG_MCQ                          = 0xD00,
+
 	REG_UFS_CFG3				= 0x271C,
 
 	REG_UFS_DEBUG_SPARE_CFG			= 0x284C,
-- 
2.17.1