qcacmn: dump reo ring when flush cache failed

When delete peer, host will try to flush all frames in REO queue
by sending a cmd through reo ring, but sometimes encounted failure to
send this cmd, dump ring status if ecountered above failure.

Change-Id: I3ea4e96e5999f85398b531ddf4f350e91e798d70
CRs-Fixed: 2167419

hal/wifi3.0/hal_api.h

@@ -195,6 +195,12 @@ extern uint32_t hal_srng_get_entrysize(void *hal_soc, int ring_type);
  */
 uint32_t hal_srng_max_entries(void *hal_soc, int ring_type);
 
+/**
+ * hal_srng_dump - Dump ring status
+ * @srng: hal srng pointer
+ */
+void hal_srng_dump(struct hal_srng *srng);
+
 /**
  * hal_srng_get_dir - Returns the direction of the ring
  * @hal_soc: Opaque HAL SOC handle

hal/wifi3.0/hal_reo.c

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016-2017 The Linux Foundation. All rights reserved.
+ * Copyright (c) 2016-2018 The Linux Foundation. All rights reserved.
  *
  * Permission to use, copy, modify, and/or distribute this software for
  * any purpose with or without fee is hereby granted, provided that the
@@ -192,6 +192,7 @@ inline int hal_reo_cmd_flush_cache(void *reo_ring, struct hal_soc *soc,
 		QDF_TRACE(QDF_MODULE_ID_TXRX, QDF_TRACE_LEVEL_DEBUG,
 			"%s: Out of cmd ring entries\n", __func__);
 		hal_srng_access_end(soc, reo_ring);
+		hal_srng_dump(reo_ring);
 		return -EBUSY;
 	}
 

hal/wifi3.0/hal_srng.c

@@ -1330,6 +1330,29 @@ enum hal_srng_dir hal_srng_get_dir(void *hal_soc, int ring_type)
 	return ring_config->ring_dir;
 }
 
+/**
+ * hal_srng_dump - Dump ring status
+ * @srng: hal srng pointer
+ */
+void hal_srng_dump(struct hal_srng *srng)
+{
+	if (srng->ring_dir == HAL_SRNG_SRC_RING) {
+		qdf_print("=== SRC RING %d ===", srng->ring_id);
+		qdf_print("hp %u, reap_hp %u, tp %u, cached tp %u",
+			  srng->u.src_ring.hp,
+			  srng->u.src_ring.reap_hp,
+			  *srng->u.src_ring.tp_addr,
+			  srng->u.src_ring.cached_tp);
+	} else {
+		qdf_print("=== DST RING %d ===", srng->ring_id);
+		qdf_print("tp %u, hp %u, cached tp %u, loop_cnt %u",
+			  srng->u.dst_ring.tp,
+			  *srng->u.dst_ring.hp_addr,
+			  srng->u.dst_ring.cached_hp,
+			  srng->u.dst_ring.loop_cnt);
+	}
+}
+
 /**
  * hal_get_srng_params - Retreive SRNG parameters for a given ring from HAL
  *