Commit 519b6274 authored by Can Guo's avatar Can Guo Committed by Martin K. Petersen
Browse files

scsi: ufs: qcom: Add MCQ ESI config vendor specific ops 



Add MCQ ESI config vendor specific ops.

Co-developed-by: default avatarAsutosh Das <quic_asutoshd@quicinc.com>
Signed-off-by: default avatarAsutosh Das <quic_asutoshd@quicinc.com>
Signed-off-by: default avatarCan Guo <quic_cang@quicinc.com>
Reviewed-by: default avatarBart Van Assche <bvanassche@acm.org>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent e02288e0

drivers/ufs/host/ufs-qcom.c

+97 −0
Original line number Diff line number Diff line
@@ -1538,6 +1538,101 @@ static int ufs_qcom_get_outstanding_cqs(struct ufs_hba *hba, 
	return 0;

}



#ifdef CONFIG_GENERIC_MSI_IRQ_DOMAIN

static void ufs_qcom_write_msi_msg(struct msi_desc *desc, struct msi_msg *msg)

{

	struct device *dev = msi_desc_to_dev(desc);

	struct ufs_hba *hba = dev_get_drvdata(dev);



	ufshcd_mcq_config_esi(hba, msg);

}



static irqreturn_t ufs_qcom_mcq_esi_handler(int irq, void *__hba)

{

	struct ufs_hba *hba = __hba;

	struct ufs_qcom_host *host = ufshcd_get_variant(hba);

	u32 id = irq - host->esi_base;

	struct ufs_hw_queue *hwq = &hba->uhq[id];



	ufshcd_mcq_write_cqis(hba, 0x1, id);

	ufshcd_mcq_poll_cqe_nolock(hba, hwq);



	return IRQ_HANDLED;

}



static int ufs_qcom_config_esi(struct ufs_hba *hba)

{

	struct ufs_qcom_host *host = ufshcd_get_variant(hba);

	struct msi_desc *desc;

	struct msi_desc *failed_desc = NULL;

	int nr_irqs, ret;



	if (host->esi_enabled)

		return 0;

	else if (host->esi_base < 0)

		return -EINVAL;



	/*

	 * 1. We only handle CQs as of now.

	 * 2. Poll queues do not need ESI.

	 */

	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)

		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);

		if (ret) {

			dev_err(hba->dev, "%s: Fail to request IRQ for %d, err = %d\n",

				__func__, desc->irq, ret);

			failed_desc = desc;

			break;

		}

	}



	if (ret) {

		/* Rewind */

		msi_for_each_desc(desc, hba->dev, MSI_DESC_ALL) {

			if (desc == failed_desc)

				break;

			devm_free_irq(hba->dev, desc->irq, hba);

		}

		platform_msi_domain_free_irqs(hba->dev);

	} else {

		if (host->hw_ver.major == 6 && host->hw_ver.minor == 0 &&

		    host->hw_ver.step == 0) {

			ufshcd_writel(hba,

				      ufshcd_readl(hba, REG_UFS_CFG3) | 0x1F000,

				      REG_UFS_CFG3);

		}

		ufshcd_mcq_enable_esi(hba);

	}



out:

	if (ret) {

		host->esi_base = -1;

		dev_warn(hba->dev, "Failed to request Platform MSI %d\n", ret);

	} else {

		host->esi_enabled = true;

	}



	return ret;

}



#else

static int ufs_qcom_config_esi(struct ufs_hba *hba)

{

	return -EOPNOTSUPP;

}

#endif



/*

 * struct ufs_hba_qcom_vops - UFS QCOM specific variant operations

 *
@@ -1566,6 +1661,7 @@ static const struct ufs_hba_variant_ops ufs_hba_qcom_vops = { 
	.get_hba_mac		= ufs_qcom_get_hba_mac,

	.op_runtime_config	= ufs_qcom_op_runtime_config,

	.get_outstanding_cqs	= ufs_qcom_get_outstanding_cqs,

	.config_esi		= ufs_qcom_config_esi,

};



/**
@@ -1599,6 +1695,7 @@ static int ufs_qcom_remove(struct platform_device *pdev) 


	pm_runtime_get_sync(&(pdev)->dev);

	ufshcd_remove(hba);

	platform_msi_domain_free_irqs(hba->dev);

	return 0;

}

drivers/ufs/host/ufs-qcom.h

+5 −0
Original line number Diff line number Diff line
@@ -52,6 +52,8 @@ enum { 
	 * added in HW Version 3.0.0

	 */

	UFS_AH8_CFG				= 0xFC,



	REG_UFS_CFG3				= 0x271C,

};



/* QCOM UFS host controller vendor specific debug registers */
@@ -217,6 +219,9 @@ struct ufs_qcom_host { 
	struct gpio_desc *device_reset;



	u32 hs_gear;



	int esi_base;

	bool esi_enabled;

};



static inline u32