qcacld-3.0: Add more memory stats pertaining to DP usage

Add sysfs node for DP level memory stats:
/sys/kernel/wifi/wlan/wlan_dp_mem_stats

This includes: Tx SKB memory allocated, Rx SKB memory
allocated, high watermarks for the memory allocations
in Rx/Tx path, Rx/Tx buffer counts, high watermarks
for these counters, outstanding Tx decs count and high
watermark for the outstanding Tx descs.

Change-Id: I58a31c6a6140801eb59512f8d764ddf8fb1d4213
CRs-Fixed: 2724442

core/hdd/src/wlan_hdd_sysfs_mem_stats.c

@@ -32,10 +32,34 @@
 static ssize_t __hdd_wlan_mem_stats_show(char *buf)
 {
 	return scnprintf(buf, PAGE_SIZE,
-			 "DMA = %u | Kmalloc = %u | SKB = %u\n",
+			 "DMA = %d HEAP = %d SKB = %d SKB_MAX = %d\n",
 			 qdf_dma_mem_stats_read(),
 			 qdf_heap_mem_stats_read(),
-			 qdf_skb_mem_stats_read());
+			 qdf_skb_total_mem_stats_read(),
+			 qdf_skb_max_mem_stats_read());
+}
+
+static ssize_t __hdd_wlan_dp_mem_stats_show(char *buf)
+{
+	int32_t len = 0;
+
+	len += scnprintf(buf + len, PAGE_SIZE,
+			 "TX_NBUF_MEM = %d MAX_TX_NBUF_MEM = %d "
+			 "RX_NBUF_MEM = %d MAX_RX_NBUF_MEM = %d "
+			 "TX_NBUF_CNT = %d MAX_TX_NBUF_CNT = %d "
+			 "RX_NBUF_CNT = %d MAX_RX_NBUF_CNT = %d "
+			 "PENDING_TX_DESCS = %d MAX_PENDING_TX_DESCS = %d\n",
+			 qdf_dp_tx_skb_mem_stats_read(),
+			 qdf_dp_tx_skb_max_mem_stats_read(),
+			 qdf_dp_rx_skb_mem_stats_read(),
+			 qdf_dp_rx_skb_max_mem_stats_read(),
+			 qdf_mem_dp_tx_skb_cnt_read(),
+			 qdf_mem_dp_tx_skb_max_cnt_read(),
+			 qdf_mem_dp_rx_skb_cnt_read(),
+			 qdf_mem_dp_rx_skb_max_cnt_read(),
+			 qdf_mem_tx_desc_cnt_read(),
+			 qdf_mem_tx_desc_max_read());
+	return len;
 }
 
 static ssize_t hdd_wlan_mem_stats_show(struct kobject *kobj,
@@ -56,8 +80,32 @@ static ssize_t hdd_wlan_mem_stats_show(struct kobject *kobj,
 		return errno;
 
 	length = __hdd_wlan_mem_stats_show(buf);
+	if (psoc_sync)
+		osif_psoc_sync_op_stop(psoc_sync);
+
+	return length;
+}
 
-	osif_psoc_sync_op_stop(psoc_sync);
+static ssize_t hdd_wlan_dp_mem_stats_show(struct kobject *kobj,
+					  struct kobj_attribute *attr,
+					  char *buf)
+{
+	struct hdd_context *hdd_ctx = cds_get_context(QDF_MODULE_ID_HDD);
+	struct osif_psoc_sync *psoc_sync;
+	ssize_t length;
+	int errno;
+
+	errno = wlan_hdd_validate_context(hdd_ctx);
+	if (errno)
+		return errno;
+
+	errno = osif_psoc_sync_op_start(hdd_ctx->parent_dev, &psoc_sync);
+	if (errno)
+		return errno;
+
+	length = __hdd_wlan_dp_mem_stats_show(buf);
+	if (psoc_sync)
+		osif_psoc_sync_op_stop(psoc_sync);
 
 	return length;
 }
@@ -65,6 +113,9 @@ static ssize_t hdd_wlan_mem_stats_show(struct kobject *kobj,
 static struct kobj_attribute mem_stats_attribute =
 	__ATTR(wlan_mem_stats, 0440, hdd_wlan_mem_stats_show, NULL);
 
+static struct kobj_attribute mem_dp_stats_attribute =
+	__ATTR(wlan_dp_mem_stats, 0440, hdd_wlan_dp_mem_stats_show, NULL);
+
 int hdd_sysfs_mem_stats_create(struct kobject *wlan_kobject)
 {
 	int error;
@@ -74,8 +125,18 @@ int hdd_sysfs_mem_stats_create(struct kobject *wlan_kobject)
 		return -EINVAL;
 	}
 	error = sysfs_create_file(wlan_kobject, &mem_stats_attribute.attr);
-	if (error)
+	if (error) {
 		hdd_err("Failed to create sysfs file wlan_mem_stats");
+		return -EINVAL;
+	}
+	error = sysfs_create_file(wlan_kobject, &mem_dp_stats_attribute.attr);
+	if (error) {
+		hdd_err("Failed to create sysfs file wlan_dp_mem_stats");
+		sysfs_remove_file(wlan_kobject, &mem_stats_attribute.attr);
+		return -EINVAL;
+	}
+
+	qdf_mem_stats_init();
 
 	return error;
 }
@@ -86,6 +147,7 @@ void hdd_sysfs_mem_stats_destroy(struct kobject *wlan_kobject)
 		hdd_err("Could not get wlan kobject!");
 		return;
 	}
+	sysfs_remove_file(wlan_kobject, &mem_dp_stats_attribute.attr);
 	sysfs_remove_file(wlan_kobject, &mem_stats_attribute.attr);
 }