[PATCH v1] scsi: ufs: qcom: Get queue ID from MSI index in ESI handler

[PATCH v1] scsi: ufs: qcom: Get queue ID from MSI index in ESI handler

[Ziqi Chen]

platform_msi_domain_alloc_irqs() does not always get consecutive
IRQ numbers, hence queue IDs calculated out from IRQ numbers may
be incorrect if we assume IRQ numbers are consecutive. Fix it by
passing msi_desc to ESI handler to use msi_desc->msi_index as
queue ID.

Signed-off-by: Can Guo <quic_cang@quicinc.com>
Signed-off-by: Ziqi Chen <quic_ziqichen@quicinc.com>
---
 drivers/ufs/host/ufs-qcom.c | 25 ++++++++++---------------
 drivers/ufs/host/ufs-qcom.h |  1 -
 2 files changed, 10 insertions(+), 16 deletions(-)

diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c
index 8d6fd4c..f36bcdb 100644
--- a/drivers/ufs/host/ufs-qcom.c
+++ b/drivers/ufs/host/ufs-qcom.c
@@ -1643,11 +1643,13 @@ static void ufs_qcom_write_msi_msg(struct msi_desc *desc, struct msi_msg *msg)
 	ufshcd_mcq_config_esi(hba, msg);
 }
 
-static irqreturn_t ufs_qcom_mcq_esi_handler(int irq, void *__hba)
+static irqreturn_t ufs_qcom_mcq_esi_handler(int irq, void *data)
 {
-	struct ufs_hba *hba = __hba;
+	struct msi_desc *desc = data;
+	struct device *dev = msi_desc_to_dev(desc);
+	struct ufs_hba *hba = dev_get_drvdata(dev);
 	struct ufs_qcom_host *host = ufshcd_get_variant(hba);
-	u32 id = irq - host->esi_base;
+	u32 id = desc->msi_index;
 	struct ufs_hw_queue *hwq = &hba->uhq[id];
 
 	ufshcd_mcq_write_cqis(hba, 0x1, id);
@@ -1665,8 +1667,6 @@ static int ufs_qcom_config_esi(struct ufs_hba *hba)
 
 	if (host->esi_enabled)
 		return 0;
-	else if (host->esi_base < 0)
-		return -EINVAL;
 
 	/*
 	 * 1. We only handle CQs as of now.
@@ -1675,16 +1675,15 @@ static int ufs_qcom_config_esi(struct ufs_hba *hba)
 	nr_irqs = hba->nr_hw_queues - hba->nr_queues[HCTX_TYPE_POLL];
 	ret = platform_msi_domain_alloc_irqs(hba->dev, nr_irqs,
 					     ufs_qcom_write_msi_msg);
-	if (ret)
+	if (ret) {
+		dev_err(hba->dev, "Failed to request Platform MSI %d\n", ret);
 		goto out;
+	}
 
 	msi_for_each_desc(desc, hba->dev, MSI_DESC_ALL) {
-		if (!desc->msi_index)
-			host->esi_base = desc->irq;
-
 		ret = devm_request_irq(hba->dev, desc->irq,
 				       ufs_qcom_mcq_esi_handler,
-				       IRQF_SHARED, "qcom-mcq-esi", hba);
+				       IRQF_SHARED, "qcom-mcq-esi", desc);
 		if (ret) {
 			dev_err(hba->dev, "%s: Fail to request IRQ for %d, err = %d\n",
 				__func__, desc->irq, ret);
@@ -1712,12 +1711,8 @@ static int ufs_qcom_config_esi(struct ufs_hba *hba)
 	}
 
 out:
-	if (ret) {
-		host->esi_base = -1;
-		dev_warn(hba->dev, "Failed to request Platform MSI %d\n", ret);
-	} else {
+	if (!ret)
 		host->esi_enabled = true;
-	}
 
 	return ret;
 }
diff --git a/drivers/ufs/host/ufs-qcom.h b/drivers/ufs/host/ufs-qcom.h
index 6289ad5..7292403 100644
--- a/drivers/ufs/host/ufs-qcom.h
+++ b/drivers/ufs/host/ufs-qcom.h
@@ -226,7 +226,6 @@ struct ufs_qcom_host {
 
 	u32 hs_gear;
 
-	int esi_base;
 	bool esi_enabled;
 };
 
-- 
2.7.4

Re: [PATCH v1] scsi: ufs: qcom: Get queue ID from MSI index in ESI handler

[Martin K. Petersen]

Ziqi,

> platform_msi_domain_alloc_irqs() does not always get consecutive IRQ
> numbers, hence queue IDs calculated out from IRQ numbers may be
> incorrect if we assume IRQ numbers are consecutive. Fix it by passing
> msi_desc to ESI handler to use msi_desc->msi_index as queue ID.

Applied to 6.6/scsi-staging, thanks!

-- 
Martin K. Petersen	Oracle Linux Engineering

Re: [PATCH v1] scsi: ufs: qcom: Get queue ID from MSI index in ESI handler

[Martin K. Petersen]

On Tue, 11 Jul 2023 15:59:08 +0800, Ziqi Chen wrote:

> platform_msi_domain_alloc_irqs() does not always get consecutive
> IRQ numbers, hence queue IDs calculated out from IRQ numbers may
> be incorrect if we assume IRQ numbers are consecutive. Fix it by
> passing msi_desc to ESI handler to use msi_desc->msi_index as
> queue ID.
> 
> 
> [...]

Applied to 6.6/scsi-queue, thanks!

[1/1] scsi: ufs: qcom: Get queue ID from MSI index in ESI handler
      https://git.kernel.org/mkp/scsi/c/8f2b78652d05

-- 
Martin K. Petersen	Oracle Linux Engineering