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author | Can Guo <quic_cang@quicinc.com> | 2022-12-14 19:06:22 -0800 |
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committer | Martin K. Petersen <martin.petersen@oracle.com> | 2023-01-13 21:12:11 -0500 |
commit | 519b6274a7775f5fe00a086f189efb8f063467d1 (patch) | |
tree | a6831f5fb90ab61c695e98b04fa4aca6510d843e /drivers/ufs/host | |
parent | e02288e0265fe316a16d48ec6dd7b7fd54d66e3e (diff) | |
download | linux-519b6274a7775f5fe00a086f189efb8f063467d1.tar.gz linux-519b6274a7775f5fe00a086f189efb8f063467d1.tar.bz2 linux-519b6274a7775f5fe00a086f189efb8f063467d1.zip |
scsi: ufs: qcom: Add MCQ ESI config vendor specific ops
Add MCQ ESI config vendor specific ops.
Co-developed-by: Asutosh Das <quic_asutoshd@quicinc.com>
Signed-off-by: Asutosh Das <quic_asutoshd@quicinc.com>
Signed-off-by: Can Guo <quic_cang@quicinc.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/ufs/host')
-rw-r--r-- | drivers/ufs/host/ufs-qcom.c | 97 | ||||
-rw-r--r-- | drivers/ufs/host/ufs-qcom.h | 5 |
2 files changed, 102 insertions, 0 deletions
diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c index 19b181447685..681da3ea7154 100644 --- a/drivers/ufs/host/ufs-qcom.c +++ b/drivers/ufs/host/ufs-qcom.c @@ -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; } diff --git a/drivers/ufs/host/ufs-qcom.h b/drivers/ufs/host/ufs-qcom.h index 8050e214f722..8a503aa4f7ab 100644 --- a/drivers/ufs/host/ufs-qcom.h +++ b/drivers/ufs/host/ufs-qcom.h @@ -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 |