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Subject[PATCH v1 05/16] ufs: core: mcq: Configure resource regions
Date
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>
---
drivers/ufs/core/ufs-mcq.c | 100 ++++++++++++++++++++++++++++++++++++++++++++-
include/ufs/ufshcd.h | 28 +++++++++++++
2 files changed, 127 insertions(+), 1 deletion(-)

diff --git a/drivers/ufs/core/ufs-mcq.c b/drivers/ufs/core/ufs-mcq.c
index 934556f..e5cc7ab 100644
--- a/drivers/ufs/core/ufs-mcq.c
+++ b/drivers/ufs/core/ufs-mcq.c
@@ -17,6 +17,12 @@
#define UFS_MCQ_MIN_READ_QUEUES 0
#define UFS_MCQ_MIN_POLL_QUEUES 0

+#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
+
static unsigned int dev_cmd_queue = 1;

static int rw_queue_count_set(const char *val, const struct kernel_param *kp)
@@ -85,6 +91,96 @@ module_param_cb(poll_queues, &poll_queue_count_ops, &poll_queues, 0644);
MODULE_PARM_DESC(poll_queues,
"Number of poll queues used for r/w. Default value is 1");

+/* Resources */
+static const struct ufshcd_res_info_t ufshcd_res_info[RES_MAX] = {
+ {.name = "ufs_mem", .resource = NULL, .base = NULL},
+ {.name = "mcq", .resource = NULL, .base = NULL},
+ /* Submission Queue DAO */
+ {.name = "mcq_sqd", .resource = NULL, .base = NULL},
+ /* Submission Queue Interrupt Status */
+ {.name = "mcq_sqis", .resource = NULL, .base = NULL},
+ /* Completion Queue DAO */
+ {.name = "mcq_cqd", .resource = NULL, .base = NULL},
+ /* Completion Queue Interrupt Status */
+ {.name = "mcq_cqis", .resource = NULL, .base = NULL},
+ /* MCQ vendor specific */
+ {.name = "mcq_vs", .resource = NULL, .base = NULL},
+};
+
+static int ufshcd_mcq_config_resource(struct ufs_hba *hba)
+{
+ struct platform_device *pdev = to_platform_device(hba->dev);
+ struct ufshcd_res_info_t *res;
+ struct resource *res_mem, *res_mcq;
+ int i, ret = 0;
+
+ memcpy(hba->res, ufshcd_res_info, sizeof(ufshcd_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_MEM)
+ return -ENOMEM;
+ continue;
+ } else if (i == RES_MEM) {
+ 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;
+ }
+ }
+
+ res = &hba->res[RES_MCQ];
+ /* MCQ resource provided in DT */
+ if (res->base)
+ goto out;
+
+ /* Manually allocate MCQ resource */
+ res_mcq = res->resource;
+ res_mcq = devm_kzalloc(hba->dev, sizeof(*res_mcq), GFP_KERNEL);
+ if (!res_mcq) {
+ dev_err(hba->dev, "Failed to alloate MCQ resource\n");
+ 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 %d\n", ret);
+ return ret;
+ }
+
+ res->base = devm_ioremap_resource(hba->dev, res_mcq);
+ if (IS_ERR(res->base)) {
+ dev_err(hba->dev, "Map MCQ registers failed, err=%d\n",
+ (int)PTR_ERR(res->base));
+ ret = PTR_ERR(res->base);
+ res->base = NULL;
+ return ret;
+ }
+
+out:
+ hba->mcq_base = res->base;
+ return 0;
+}
+
static int ufshcd_mcq_config_nr_queues(struct ufs_hba *hba)
{
int i, rem;
@@ -126,7 +222,9 @@ int ufshcd_mcq_init(struct ufs_hba *hba)
int ret;

ret = ufshcd_mcq_config_nr_queues(hba);
-
+ if (ret)
+ return ret;
+ ret = ufshcd_mcq_config_resource(hba);
return ret;
}

diff --git a/include/ufs/ufshcd.h b/include/ufs/ufshcd.h
index 298e103..54d742a 100644
--- a/include/ufs/ufshcd.h
+++ b/include/ufs/ufshcd.h
@@ -720,6 +720,30 @@ struct ufs_hba_monitor {
};

/**
+ * struct ufshcd_res_info_t - MCQ related resource regions
+ *
+ * @name: resource name
+ * @resource: pointer to resource region
+ * @base: register base address
+ */
+struct ufshcd_res_info_t {
+ const char *name;
+ struct resource *resource;
+ void __iomem *base;
+};
+
+enum ufshcd_res {
+ RES_MEM,
+ RES_MCQ,
+ RES_MCQ_SQD,
+ RES_MCQ_SQIS,
+ RES_MCQ_CQD,
+ RES_MCQ_CQIS,
+ RES_MCQ_VS,
+ RES_MAX,
+};
+
+/**
* struct ufs_hba - per adapter private structure
* @mmio_base: UFSHCI base register address
* @ucdl_base_addr: UFS Command Descriptor base address
@@ -829,6 +853,8 @@ struct ufs_hba_monitor {
* @mcq_sup: is mcq supported by UFSHC
* @nr_hw_queues: number of hardware queues configured
* @nr_queues: number of Queues of different queue types
+ * @res: array of resource info of MCQ registers
+ * @mcq_base: Multi circular queue registers base address
*/
struct ufs_hba {
void __iomem *mmio_base;
@@ -981,6 +1007,8 @@ struct ufs_hba {
bool mcq_sup;
unsigned int nr_hw_queues;
unsigned int nr_queues[HCTX_MAX_TYPES];
+ struct ufshcd_res_info_t res[RES_MAX];
+ void __iomem *mcq_base;
};

static inline bool is_mcq_supported(struct ufs_hba *hba)
--
2.7.4
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