[SCSI] ufs: add dme configuration primitives

[karo-tx-linux.git] / drivers / scsi / ufs / ufshcd.c

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 46b0754b4b76b602b041f9d4d08365322dd4b6c1..a4ce6c462614d68aee10e7575a7b45bf8390586c 100644 (file)
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -234,6 +234,18 @@ static inline int ufshcd_get_uic_cmd_result(struct ufs_hba *hba)
               MASK_UIC_COMMAND_RESULT;
 }
 
+/**
+ * ufshcd_get_dme_attr_val - Get the value of attribute returned by UIC command
+ * @hba: Pointer to adapter instance
+ *
+ * This function gets UIC command argument3
+ * Returns 0 on success, non zero value on error
+ */
+static inline u32 ufshcd_get_dme_attr_val(struct ufs_hba *hba)
+{
+       return ufshcd_readl(hba, REG_UIC_COMMAND_ARG_3);
+}
+
 /**
  * ufshcd_get_req_rsp - returns the TR response transaction type
  * @ucd_rsp_ptr: pointer to response UPIU
@@ -1373,6 +1385,80 @@ static int ufshcd_dme_link_startup(struct ufs_hba *hba)
        return ret;
 }
 
+/**
+ * ufshcd_dme_set_attr - UIC command for DME_SET, DME_PEER_SET
+ * @hba: per adapter instance
+ * @attr_sel: uic command argument1
+ * @attr_set: attribute set type as uic command argument2
+ * @mib_val: setting value as uic command argument3
+ * @peer: indicate whether peer or local
+ *
+ * Returns 0 on success, non-zero value on failure
+ */
+int ufshcd_dme_set_attr(struct ufs_hba *hba, u32 attr_sel,
+                       u8 attr_set, u32 mib_val, u8 peer)
+{
+       struct uic_command uic_cmd = {0};
+       static const char *const action[] = {
+               "dme-set",
+               "dme-peer-set"
+       };
+       const char *set = action[!!peer];
+       int ret;
+
+       uic_cmd.command = peer ?
+               UIC_CMD_DME_PEER_SET : UIC_CMD_DME_SET;
+       uic_cmd.argument1 = attr_sel;
+       uic_cmd.argument2 = UIC_ARG_ATTR_TYPE(attr_set);
+       uic_cmd.argument3 = mib_val;
+
+       ret = ufshcd_send_uic_cmd(hba, &uic_cmd);
+       if (ret)
+               dev_err(hba->dev, "%s: attr-id 0x%x val 0x%x error code %d\n",
+                       set, UIC_GET_ATTR_ID(attr_sel), mib_val, ret);
+
+       return ret;
+}
+EXPORT_SYMBOL_GPL(ufshcd_dme_set_attr);
+
+/**
+ * ufshcd_dme_get_attr - UIC command for DME_GET, DME_PEER_GET
+ * @hba: per adapter instance
+ * @attr_sel: uic command argument1
+ * @mib_val: the value of the attribute as returned by the UIC command
+ * @peer: indicate whether peer or local
+ *
+ * Returns 0 on success, non-zero value on failure
+ */
+int ufshcd_dme_get_attr(struct ufs_hba *hba, u32 attr_sel,
+                       u32 *mib_val, u8 peer)
+{
+       struct uic_command uic_cmd = {0};
+       static const char *const action[] = {
+               "dme-get",
+               "dme-peer-get"
+       };
+       const char *get = action[!!peer];
+       int ret;
+
+       uic_cmd.command = peer ?
+               UIC_CMD_DME_PEER_GET : UIC_CMD_DME_GET;
+       uic_cmd.argument1 = attr_sel;
+
+       ret = ufshcd_send_uic_cmd(hba, &uic_cmd);
+       if (ret) {
+               dev_err(hba->dev, "%s: attr-id 0x%x error code %d\n",
+                       get, UIC_GET_ATTR_ID(attr_sel), ret);
+               goto out;
+       }
+
+       if (mib_val)
+               *mib_val = uic_cmd.argument3;
+out:
+       return ret;
+}
+EXPORT_SYMBOL_GPL(ufshcd_dme_get_attr);
+
 /**
  * ufshcd_complete_dev_init() - checks device readiness
  * hba: per-adapter instance
@@ -1908,6 +1994,8 @@ static void ufshcd_uic_cmd_compl(struct ufs_hba *hba)
        if (hba->active_uic_cmd) {
                hba->active_uic_cmd->argument2 |=
                        ufshcd_get_uic_cmd_result(hba);
+               hba->active_uic_cmd->argument3 =
+                       ufshcd_get_dme_attr_val(hba);
                complete(&hba->active_uic_cmd->done);
        }
 }