scsi: ufs: core: mcq: Configure resource regions

Define the MCQ resources and add support to ioremap the resource regions.

Co-developed-by: Can Guo <quic_cang@quicinc.com>
Signed-off-by: Can Guo <quic_cang@quicinc.com>
Signed-off-by: Asutosh Das <quic_asutoshd@quicinc.com>
Reviewed-by: Manivannan Sadhasivam <mani@kernel.org>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

3 files changed, 112 insertions, 0 deletions

diff --git a/drivers/ufs/core/ufs-mcq.c b/drivers/ufs/core/ufs-mcq.c
index 6ed362547806..65c00373af0e 100644
--- a/drivers/ufs/core/ufs-mcq.c
+++ b/drivers/ufs/core/ufs-mcq.c
@@ -119,6 +119,9 @@ int ufshcd_mcq_init(struct ufs_hba *hba)
 	int ret;
 
 	ret = ufshcd_mcq_config_nr_queues(hba);
+	if (ret)
+		return ret;
 
+	ret = ufshcd_vops_mcq_config_resource(hba);
 	return ret;
 }
diff --git a/drivers/ufs/core/ufshcd-priv.h b/drivers/ufs/core/ufshcd-priv.h
index 8d93ef675cea..e3bc4ce274e3 100644
--- a/drivers/ufs/core/ufshcd-priv.h
+++ b/drivers/ufs/core/ufshcd-priv.h
@@ -230,6 +230,14 @@ static inline void ufshcd_vops_reinit_notify(struct ufs_hba *hba)
 		hba->vops->reinit_notify(hba);
 }
 
+static inline int ufshcd_vops_mcq_config_resource(struct ufs_hba *hba)
+{
+	if (hba->vops && hba->vops->mcq_config_resource)
+		return hba->vops->mcq_config_resource(hba);
+
+	return -EOPNOTSUPP;
+}
+
 extern const struct ufs_pm_lvl_states ufs_pm_lvl_states[];
 
 /**
diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c
index 5e7ba3b6a59d..2a1434ff0501 100644
--- a/drivers/ufs/host/ufs-qcom.c
+++ b/drivers/ufs/host/ufs-qcom.c
@@ -22,6 +22,12 @@
 #include <ufs/ufshci.h>
 #include <ufs/ufs_quirks.h>
 
+#define MCQ_QCFGPTR_MASK	GENMASK(7, 0)
+#define MCQ_QCFGPTR_UNIT	0x200
+#define MCQ_SQATTR_OFFSET(c) \
+	((((c) >> 16) & MCQ_QCFGPTR_MASK) * MCQ_QCFGPTR_UNIT)
+#define MCQ_QCFG_SIZE	0x40
+
 enum {
 	TSTBUS_UAWM,
 	TSTBUS_UARM,
@@ -1396,6 +1402,100 @@ static void ufs_qcom_reinit_notify(struct ufs_hba *hba)
 	phy_power_off(host->generic_phy);
 }
 
+/* Resources */
+static const struct ufshcd_res_info ufs_res_info[RES_MAX] = {
+	{.name = "ufs_mem",},
+	{.name = "mcq",},
+	/* Submission Queue DAO */
+	{.name = "mcq_sqd",},
+	/* Submission Queue Interrupt Status */
+	{.name = "mcq_sqis",},
+	/* Completion Queue DAO */
+	{.name = "mcq_cqd",},
+	/* Completion Queue Interrupt Status */
+	{.name = "mcq_cqis",},
+	/* MCQ vendor specific */
+	{.name = "mcq_vs",},
+};
+
+static int ufs_qcom_mcq_config_resource(struct ufs_hba *hba)
+{
+	struct platform_device *pdev = to_platform_device(hba->dev);
+	struct ufshcd_res_info *res;
+	struct resource *res_mem, *res_mcq;
+	int i, ret = 0;
+
+	memcpy(hba->res, ufs_res_info, sizeof(ufs_res_info));
+
+	for (i = 0; i < RES_MAX; i++) {
+		res = &hba->res[i];
+		res->resource = platform_get_resource_byname(pdev,
+							     IORESOURCE_MEM,
+							     res->name);
+		if (!res->resource) {
+			dev_info(hba->dev, "Resource %s not provided\n", res->name);
+			if (i == RES_UFS)
+				return -ENOMEM;
+			continue;
+		} else if (i == RES_UFS) {
+			res_mem = res->resource;
+			res->base = hba->mmio_base;
+			continue;
+		}
+
+		res->base = devm_ioremap_resource(hba->dev, res->resource);
+		if (IS_ERR(res->base)) {
+			dev_err(hba->dev, "Failed to map res %s, err=%d\n",
+					 res->name, (int)PTR_ERR(res->base));
+			res->base = NULL;
+			ret = PTR_ERR(res->base);
+			return ret;
+		}
+	}
+
+	/* MCQ resource provided in DT */
+	res = &hba->res[RES_MCQ];
+	/* Bail if MCQ resource is provided */
+	if (res->base)
+		goto out;
+
+	/* Explicitly allocate MCQ resource from ufs_mem */
+	res_mcq = devm_kzalloc(hba->dev, sizeof(*res_mcq), GFP_KERNEL);
+	if (!res_mcq)
+		return ret;
+
+	res_mcq->start = res_mem->start +
+			 MCQ_SQATTR_OFFSET(hba->mcq_capabilities);
+	res_mcq->end = res_mcq->start + hba->nr_hw_queues * MCQ_QCFG_SIZE - 1;
+	res_mcq->flags = res_mem->flags;
+	res_mcq->name = "mcq";
+
+	ret = insert_resource(&iomem_resource, res_mcq);
+	if (ret) {
+		dev_err(hba->dev, "Failed to insert MCQ resource, err=%d\n",
+			ret);
+		goto insert_res_err;
+	}
+
+	res->base = devm_ioremap_resource(hba->dev, res_mcq);
+	if (IS_ERR(res->base)) {
+		dev_err(hba->dev, "MCQ registers mapping failed, err=%d\n",
+			(int)PTR_ERR(res->base));
+		ret = PTR_ERR(res->base);
+		goto ioremap_err;
+	}
+
+out:
+	hba->mcq_base = res->base;
+	return 0;
+ioremap_err:
+	res->base = NULL;
+	remove_resource(res_mcq);
+insert_res_err:
+	devm_kfree(hba->dev, res_mcq);
+	return ret;
+}
+
 /*
  * struct ufs_hba_qcom_vops - UFS QCOM specific variant operations
  *
@@ -1420,6 +1520,7 @@ static const struct ufs_hba_variant_ops ufs_hba_qcom_vops = {
 	.config_scaling_param = ufs_qcom_config_scaling_param,
 	.program_key		= ufs_qcom_ice_program_key,
 	.reinit_notify		= ufs_qcom_reinit_notify,
+	.mcq_config_resource	= ufs_qcom_mcq_config_resource,
 };
 
 /**