[PATCH v3 4/6] bus/fslmc/mc: implement dpcon_set_notification

[Maxime Leroy <maxime@leroys.fr>]

The DPCON_CMDID_SET_NOTIFICATION command id and its wire struct were
already present in the flib, but the dpcon_set_notification() function and
the public dpcon_notification_cfg were never implemented. Add them so a
DPCON channel can be pointed at a DPIO for CDAN delivery, which the
net/dpaa2 Rx-queue-interrupt path needs.

Signed-off-by: Maxime Leroy <maxime@leroys.fr>
---
 drivers/bus/fslmc/mc/dpcon.c     | 31 +++++++++++++++++++++++++++++++
 drivers/bus/fslmc/mc/fsl_dpcon.h | 18 ++++++++++++++++++
 2 files changed, 49 insertions(+)

diff --git a/drivers/bus/fslmc/mc/dpcon.c b/drivers/bus/fslmc/mc/dpcon.c
index cd909fcac4..3ab2a12637 100644
--- a/drivers/bus/fslmc/mc/dpcon.c
+++ b/drivers/bus/fslmc/mc/dpcon.c
@@ -338,3 +338,34 @@ int dpcon_get_api_version(struct fsl_mc_io *mc_io,
 
 	return 0;
 }
+
+/**
+ * dpcon_set_notification() - Set the DPCON notification destination
+ * @mc_io:	Pointer to MC portal's I/O object
+ * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
+ * @token:	Token of DPCON object
+ * @cfg:	Notification parameters (DPIO, priority, user context)
+ *
+ * Return:	'0' on Success; Error code otherwise
+ */
+RTE_EXPORT_INTERNAL_SYMBOL(dpcon_set_notification)
+int dpcon_set_notification(struct fsl_mc_io *mc_io,
+			   uint32_t cmd_flags,
+			   uint16_t token,
+			   const struct dpcon_notification_cfg *cfg)
+{
+	struct dpcon_cmd_set_notification *dpcon_cmd;
+	struct mc_command cmd = { 0 };
+
+	/* prepare command */
+	cmd.header = mc_encode_cmd_header(DPCON_CMDID_SET_NOTIFICATION,
+					  cmd_flags,
+					  token);
+	dpcon_cmd = (struct dpcon_cmd_set_notification *)cmd.params;
+	dpcon_cmd->dpio_id = cpu_to_le32(cfg->dpio_id);
+	dpcon_cmd->priority = cfg->priority;
+	dpcon_cmd->user_ctx = cpu_to_le64(cfg->user_ctx);
+
+	/* send command to mc*/
+	return mc_send_command(mc_io, &cmd);
+}
diff --git a/drivers/bus/fslmc/mc/fsl_dpcon.h b/drivers/bus/fslmc/mc/fsl_dpcon.h
index f2668da1b1..3bef97f6f5 100644
--- a/drivers/bus/fslmc/mc/fsl_dpcon.h
+++ b/drivers/bus/fslmc/mc/fsl_dpcon.h
@@ -95,4 +95,22 @@ int dpcon_get_api_version(struct fsl_mc_io *mc_io,
 			  uint16_t *major_ver,
 			  uint16_t *minor_ver);
 
+/**
+ * struct dpcon_notification_cfg - Notification parameters
+ * @dpio_id:	DPIO object id that receives the channel's CDAN
+ * @priority:	Priority within the DPIO channel (0-7)
+ * @user_ctx:	User context provided with each CDAN message
+ */
+struct dpcon_notification_cfg {
+	int dpio_id;
+	uint8_t priority;
+	uint64_t user_ctx;
+};
+
+__rte_internal
+int dpcon_set_notification(struct fsl_mc_io *mc_io,
+			   uint32_t cmd_flags,
+			   uint16_t token,
+			   const struct dpcon_notification_cfg *cfg);
+
 #endif /* __FSL_DPCON_H */
-- 
2.43.0