qcacmn: Retain ds ring indices across wifi restart

Retain ds ring indices across wifi restart to avoid
edma hang. Fetch the indices from ds module and set
the corresponding ds ring indices.

Change-Id: Ia299a7006166aef096c7d2c1f65f6bef65415a37
CRs-Fixed: 3332152

hal/wifi3.0/hal_srng.c

@@ -1420,14 +1420,15 @@ qdf_export_symbol(hal_srng_dst_init_hp);
  * @hal_soc: HAL SOC handle
  * @srng: SRNG ring pointer
  * @idle_check: Check if ring is idle
+ * @idx: ring index
  */
 static inline void hal_srng_hw_init(struct hal_soc *hal,
-	struct hal_srng *srng, bool idle_check)
+	struct hal_srng *srng, bool idle_check, uint32_t idx)
 {
 	if (srng->ring_dir == HAL_SRNG_SRC_RING)
-		hal_srng_src_hw_init(hal, srng, idle_check);
+		hal_srng_src_hw_init(hal, srng, idle_check, idx);
 	else
-		hal_srng_dst_hw_init(hal, srng, idle_check);
+		hal_srng_dst_hw_init(hal, srng, idle_check, idx);
 }
 
 #ifdef WLAN_FEATURE_NEAR_FULL_IRQ
@@ -1569,7 +1570,7 @@ static inline void hal_srng_update_high_wm_thresholds(struct hal_srng *srng)
 #endif
 
 /**
- * hal_srng_setup - Initialize HW SRNG ring.
+ * hal_srng_setup_idx - Initialize HW SRNG ring.
  * @hal_soc: Opaque HAL SOC handle
  * @ring_type: one of the types from hal_ring_type
  * @ring_num: Ring number if there are multiple rings of same type (staring
@@ -1577,6 +1578,7 @@ static inline void hal_srng_update_high_wm_thresholds(struct hal_srng *srng)
  * @mac_id: valid MAC Id should be passed if ring type is one of lmac rings
  * @ring_params: SRNG ring params in hal_srng_params structure.
  * @idle_check: Check if ring is idle
+ * @idx: Ring index to be programmed as init value in HP/TP based on srng type
  *
  * Callers are expected to allocate contiguous ring memory of size
  * 'num_entries * entry_size' bytes and pass the physical and virtual base
@@ -1588,11 +1590,13 @@ static inline void hal_srng_update_high_wm_thresholds(struct hal_srng *srng)
  * Return: Opaque pointer to ring on success
  *		 NULL on failure (if given ring is not available)
  */
-void *hal_srng_setup(void *hal_soc, int ring_type, int ring_num,
-	int mac_id, struct hal_srng_params *ring_params, bool idle_check)
+void *hal_srng_setup_idx(void *hal_soc, int ring_type, int ring_num, int mac_id,
+			 struct hal_srng_params *ring_params, bool idle_check,
+			 uint32_t idx)
 {
 	int ring_id;
 	struct hal_soc *hal = (struct hal_soc *)hal_soc;
+	hal_soc_handle_t hal_hdl = (hal_soc_handle_t)hal;
 	struct hal_srng *srng;
 	struct hal_hw_srng_config *ring_config =
 		HAL_SRNG_CONFIG(hal, ring_type);
@@ -1758,7 +1762,18 @@ void *hal_srng_setup(void *hal_soc, int ring_type, int ring_num,
 	}
 
 	if (!(ring_config->lmac_ring)) {
-		hal_srng_hw_init(hal, srng, idle_check);
+		if (idx) {
+			hal->ops->hal_tx_ring_halt_set(hal_hdl);
+			do {
+				hal_info("Waiting for ring reset\n");
+			} while (!(hal->ops->hal_tx_ring_halt_poll(hal_hdl)));
+		}
+		hal_srng_hw_init(hal, srng, idle_check, idx);
+
+		if (idx) {
+			hal->ops->hal_tx_ring_halt_reset(hal_hdl);
+		}
+
 
 		if (ring_type == CE_DST) {
 			srng->u.dst_ring.max_buffer_length = ring_params->max_buffer_length;
@@ -1774,6 +1789,35 @@ void *hal_srng_setup(void *hal_soc, int ring_type, int ring_num,
 
 	return (void *)srng;
 }
+qdf_export_symbol(hal_srng_setup_idx);
+
+/**
+ * hal_srng_setup - Initialize HW SRNG ring.
+ * @hal_soc: Opaque HAL SOC handle
+ * @ring_type: one of the types from hal_ring_type
+ * @ring_num: Ring number if there are multiple rings of same type (staring
+ * from 0)
+ * @mac_id: valid MAC Id should be passed if ring type is one of lmac rings
+ * @ring_params: SRNG ring params in hal_srng_params structure.
+ * @idle_check: Check if ring is idle
+ *
+ * Callers are expected to allocate contiguous ring memory of size
+ * 'num_entries * entry_size' bytes and pass the physical and virtual base
+ * addresses through 'ring_base_paddr' and 'ring_base_vaddr' in
+ * hal_srng_params structure. Ring base address should be 8 byte aligned
+ * and size of each ring entry should be queried using the API
+ * hal_srng_get_entrysize
+ *
+ * Return: Opaque pointer to ring on success
+ *		 NULL on failure (if given ring is not available)
+ */
+void *hal_srng_setup(void *hal_soc, int ring_type, int ring_num,
+		     int mac_id, struct hal_srng_params *ring_params,
+		     bool idle_check)
+{
+	return hal_srng_setup_idx(hal_soc, ring_type, ring_num, mac_id,
+				  ring_params, idle_check, 0);
+}
 qdf_export_symbol(hal_srng_setup);
 
 /**