qcacmn: Record last 32 dp ipa reo remap register writes

For debug purpose of issues related to IPA NOC errors and
register writes not going through, record last 32 dp ipa
reo remap register writes which are outside of non shadow
region registers.

Change-Id: If2dfe7250bb2a6bbe0e180df137c92b43a150b2c
CRs-Fixed: 2571608

dp/wifi3.0/dp_ipa.c

@@ -42,6 +42,54 @@
  * this issue.
  */
 #define DP_IPA_WAR_WBM2SW_REL_RING_NO_BUF_ENTRIES 16
+/**
+ *struct dp_ipa_reo_remap_record - history for dp ipa reo remaps
+ * @ix0_reg: reo destination ring IX0 value
+ * @ix2_reg: reo destination ring IX2 value
+ * @ix3_reg: reo destination ring IX3 value
+ */
+struct dp_ipa_reo_remap_record {
+	uint64_t timestamp;
+	uint32_t ix0_reg;
+	uint32_t ix2_reg;
+	uint32_t ix3_reg;
+};
+
+#define REO_REMAP_HISTORY_SIZE 32
+
+struct dp_ipa_reo_remap_record dp_ipa_reo_remap_history[REO_REMAP_HISTORY_SIZE];
+
+static qdf_atomic_t dp_ipa_reo_remap_history_index;
+static int dp_ipa_reo_remap_record_index_next(qdf_atomic_t *index)
+{
+	int next = qdf_atomic_inc_return(index);
+
+	if (next == REO_REMAP_HISTORY_SIZE)
+		qdf_atomic_sub(REO_REMAP_HISTORY_SIZE, index);
+
+	return next % REO_REMAP_HISTORY_SIZE;
+}
+
+/**
+ * dp_ipa_reo_remap_history_add() - Record dp ipa reo remap values
+ * @ix0_val: reo destination ring IX0 value
+ * @ix2_val: reo destination ring IX2 value
+ * @ix3_val: reo destination ring IX3 value
+ *
+ * Return: None
+ */
+static void dp_ipa_reo_remap_history_add(uint32_t ix0_val, uint32_t ix2_val,
+					 uint32_t ix3_val)
+{
+	int idx = dp_ipa_reo_remap_record_index_next(
+				&dp_ipa_reo_remap_history_index);
+	struct dp_ipa_reo_remap_record *record = &dp_ipa_reo_remap_history[idx];
+
+	record->timestamp = qdf_get_log_timestamp();
+	record->ix0_reg = ix0_val;
+	record->ix2_reg = ix2_val;
+	record->ix3_reg = ix3_val;
+}
 
 static QDF_STATUS __dp_ipa_handle_buf_smmu_mapping(struct dp_soc *soc,
 						   qdf_nbuf_t nbuf,
@@ -788,9 +836,11 @@ QDF_STATUS dp_ipa_enable_autonomy(struct cdp_soc_t *soc_hdl, uint8_t pdev_id)
 
 		hal_reo_read_write_ctrl_ix(soc->hal_soc, false, &ix0, NULL,
 					   &ix2, &ix2);
+		dp_ipa_reo_remap_history_add(ix0, ix2, ix2);
 	} else {
 		hal_reo_read_write_ctrl_ix(soc->hal_soc, false, &ix0, NULL,
 					   NULL, NULL);
+		dp_ipa_reo_remap_history_add(ix0, 0, 0);
 	}
 
 	return QDF_STATUS_SUCCESS;
@@ -831,9 +881,11 @@ QDF_STATUS dp_ipa_disable_autonomy(struct cdp_soc_t *soc_hdl, uint8_t pdev_id)
 
 		hal_reo_read_write_ctrl_ix(soc->hal_soc, false, &ix0, NULL,
 					   &ix2, &ix3);
+		dp_ipa_reo_remap_history_add(ix0, ix2, ix3);
 	} else {
 		hal_reo_read_write_ctrl_ix(soc->hal_soc, false, &ix0, NULL,
 					   NULL, NULL);
+		dp_ipa_reo_remap_history_add(ix0, 0, 0);
 	}
 
 	return QDF_STATUS_SUCCESS;