qcacmn: Add memory stats pertaining to DP usage

Add sysfs node for DP level memory stats:
/sys/kernel/wifi/wlan/wlan_dp_mem_stats
These include Tx, Rx SKB memory allocated, Tx/Rx
buffer count, outstanding Tx desc count.
Add and subtract the skb memory for Rx/Tx when
the map/unmap functions are invoked.

Change-Id: If62cc47bb60f7eb63f60e861f755f3417248677f
CRs-Fixed: 2724482

qdf/inc/qdf_mem.h

@@ -28,6 +28,7 @@
 #include <qdf_types.h>
 #include <i_qdf_mem.h>
 #include <i_qdf_trace.h>
+#include <qdf_atomic.h>
 
 #define QDF_CACHE_LINE_SZ __qdf_cache_line_sz
 
@@ -604,7 +605,85 @@ void qdf_mem_skb_inc(qdf_size_t size);
  */
 void qdf_mem_skb_dec(qdf_size_t size);
 
+/**
+ * qdf_mem_skb_total_inc() - increment total skb allocation size
+ * in host driver in both debug and perf builds
+ * @size: size to be added
+ *
+ * Return: none
+ */
+void qdf_mem_skb_total_inc(qdf_size_t size);
+
+/**
+ * qdf_mem_skb_total_dec() - decrement total skb allocation size
+ * in the host driver in debug and perf flavors
+ * @size: size to be decremented
+ *
+ * Return: none
+ */
+void qdf_mem_skb_total_dec(qdf_size_t size);
+
+/**
+ * qdf_mem_dp_tx_skb_inc() - Increment Tx skb allocation size
+ * @size: size to be added
+ *
+ * Return: none
+ */
+void qdf_mem_dp_tx_skb_inc(qdf_size_t size);
+
+/**
+ * qdf_mem_dp_tx_skb_dec() - Decrement Tx skb allocation size
+ * @size: size to be decreased
+ *
+ * Return: none
+ */
+void qdf_mem_dp_tx_skb_dec(qdf_size_t size);
+
+/**
+ * qdf_mem_dp_rx_skb_inc() - Increment Rx skb allocation size
+ * @size: size to be added
+ *
+ * Return: none
+ */
+void qdf_mem_dp_rx_skb_inc(qdf_size_t size);
+
+/**
+ * qdf_mem_dp_rx_skb_dec() - Decrement Rx skb allocation size
+ * @size: size to be decreased
+ *
+ * Return: none
+ */
+void qdf_mem_dp_rx_skb_dec(qdf_size_t size);
+
+/**
+ * qdf_mem_dp_tx_skb_cnt_inc() - Increment Tx buffer count
+ *
+ * Return: none
+ */
+void qdf_mem_dp_tx_skb_cnt_inc(void);
+
+/**
+ * qdf_mem_dp_tx_skb_cnt_dec() - Decrement Tx buffer count
+ *
+ * Return: none
+ */
+void qdf_mem_dp_tx_skb_cnt_dec(void);
+
+/**
+ * qdf_mem_dp_rx_skb_cnt_inc() - Increment Rx buffer count
+ *
+ * Return: none
+ */
+void qdf_mem_dp_rx_skb_cnt_inc(void);
+
+/**
+ * qdf_mem_dp_rx_skb_cnt_dec() - Decrement Rx buffer count
+ *
+ * Return: none
+ */
+void qdf_mem_dp_rx_skb_cnt_dec(void);
 #else
+
 static inline void qdf_mem_skb_inc(qdf_size_t size)
 {
 }
@@ -612,6 +691,46 @@ static inline void qdf_mem_skb_inc(qdf_size_t size)
 static inline void qdf_mem_skb_dec(qdf_size_t size)
 {
 }
+
+static inline void qdf_mem_skb_total_inc(qdf_size_t size)
+{
+}
+
+static inline void qdf_mem_skb_total_dec(qdf_size_t size)
+{
+}
+
+static inline void qdf_mem_dp_tx_skb_inc(qdf_size_t size)
+{
+}
+
+static inline void qdf_mem_dp_tx_skb_dec(qdf_size_t size)
+{
+}
+
+static inline void qdf_mem_dp_rx_skb_inc(qdf_size_t size)
+{
+}
+
+static inline void qdf_mem_dp_rx_skb_dec(qdf_size_t size)
+{
+}
+
+static inline void qdf_mem_dp_tx_skb_cnt_inc(void)
+{
+}
+
+static inline void qdf_mem_dp_tx_skb_cnt_dec(void)
+{
+}
+
+static inline void qdf_mem_dp_rx_skb_cnt_inc(void)
+{
+}
+
+static inline void qdf_mem_dp_rx_skb_cnt_dec(void)
+{
+}
 #endif /* CONFIG_WLAN_SYSFS_MEM_STATS */
 
 /**
@@ -868,7 +987,7 @@ static inline void qdf_mem_shared_mem_free(qdf_device_t osdev,
  * qdf_dma_mem_stats_read() - Return the DMA memory allocated in
  * host driver
  *
- * Return: None
+ * Return: Total DMA memory allocated
  */
 int32_t qdf_dma_mem_stats_read(void);
 
@@ -876,7 +995,7 @@ int32_t qdf_dma_mem_stats_read(void);
  * qdf_heap_mem_stats_read() - Return the heap memory allocated
  * in host driver
  *
- * Return: None
+ * Return: Total heap memory allocated
  */
 int32_t qdf_heap_mem_stats_read(void);
 
@@ -884,8 +1003,127 @@ int32_t qdf_heap_mem_stats_read(void);
  * qdf_skb_mem_stats_read() - Return the SKB memory allocated in
  * host driver
  *
- * Return: None
+ * Return: Total SKB memory allocated
  */
 int32_t qdf_skb_mem_stats_read(void);
 
+/**
+ * qdf_skb_total_mem_stats_read() - Return the SKB memory allocated
+ * in the host driver tracked in both debug and perf builds
+ *
+ * Return: Total SKB memory allocated
+ */
+int32_t qdf_skb_total_mem_stats_read(void);
+
+/**
+ * qdf_skb_max_mem_stats_read() - Return the max SKB memory
+ * allocated in host driver. This is the high watermark for the
+ * total SKB allocated in the host driver
+ *
+ * Return: None
+ */
+int32_t qdf_skb_max_mem_stats_read(void);
+
+/**
+ * qdf_mem_tx_desc_cnt_read() - Return the outstanding Tx descs
+ * which are waiting on Tx completions
+ *
+ * Return: Outstanding Tx desc count
+ */
+int32_t qdf_mem_tx_desc_cnt_read(void);
+
+/**
+ * qdf_mem_tx_desc_max_read() - Return the max outstanding Tx
+ * descs which are waiting on Tx completions. This is the high
+ * watermark for the pending desc count
+ *
+ * Return: Max outstanding Tx desc count
+ */
+int32_t qdf_mem_tx_desc_max_read(void);
+
+/**
+ * qdf_mem_stats_init() - Initialize the qdf memstats fields on
+ * creating the sysfs node
+ *
+ * Return: None
+ */
+void qdf_mem_stats_init(void);
+
+/**
+ * qdf_dp_tx_skb_mem_stats_read() - Return the SKB memory
+ * allocated for Tx data path
+ *
+ * Return: Tx SKB memory allocated
+ */
+int32_t qdf_dp_tx_skb_mem_stats_read(void);
+
+/**
+ * qdf_dp_rx_skb_mem_stats_read() - Return the SKB memory
+ * allocated for Rx data path
+ *
+ * Return: Rx SKB memory allocated
+ */
+int32_t qdf_dp_rx_skb_mem_stats_read(void);
+
+/**
+ * qdf_dp_tx_skb_max_mem_stats_read() - Return the high
+ * watermark for the SKB memory allocated for Tx data path
+ *
+ * Return: Max Tx SKB memory allocated
+ */
+int32_t qdf_dp_tx_skb_max_mem_stats_read(void);
+
+/**
+ * qdf_dp_rx_skb_max_mem_stats_read() - Return the high
+ * watermark for the SKB memory allocated for Rx data path
+ *
+ * Return: Max Rx SKB memory allocated
+ */
+int32_t qdf_dp_rx_skb_max_mem_stats_read(void);
+
+/**
+ * qdf_mem_dp_tx_skb_cnt_read() - Return number of buffers
+ * allocated in the Tx data path by the host driver or
+ * buffers coming from the n/w stack
+ *
+ * Return: Number of DP Tx buffers allocated
+ */
+int32_t qdf_mem_dp_tx_skb_cnt_read(void);
+
+/**
+ * qdf_mem_dp_tx_skb_max_cnt_read() - Return max number of
+ * buffers allocated in the Tx data path
+ *
+ * Return: Max number of DP Tx buffers allocated
+ */
+int32_t qdf_mem_dp_tx_skb_max_cnt_read(void);
+
+/**
+ * qdf_mem_dp_rx_skb_cnt_read() - Return number of buffers
+ * allocated in the Rx data path
+ *
+ * Return: Number of DP Rx buffers allocated
+ */
+int32_t qdf_mem_dp_rx_skb_cnt_read(void);
+
+/**
+ * qdf_mem_dp_rx_skb_max_cnt_read() - Return max number of
+ * buffers allocated in the Rx data path
+ *
+ * Return: Max number of DP Rx buffers allocated
+ */
+int32_t qdf_mem_dp_rx_skb_max_cnt_read(void);
+
+/**
+ * qdf_mem_tx_desc_cnt_update() - Update the pending tx desc
+ * count and the high watermark for pending tx desc count
+ *
+ * @pending_tx_descs: outstanding Tx desc count
+ * @tx_descs_max: high watermark for outstanding Tx desc count
+ *
+ * Return: None
+ */
+void qdf_mem_tx_desc_cnt_update(qdf_atomic_t pending_tx_descs,
+				int32_t tx_descs_max);
+
 #endif /* __QDF_MEMORY_H */