wl12xx: track freed packets in FW by AC

Track the number of freed packets in each AC when receiving an interrupt
from the FW. This paves the way for tracking allocated packets per AC.

Signed-off-by: Arik Nemtsov <arik@wizery.com>
Signed-off-by: Eliad Peller <eliad@wizery.com>
Signed-off-by: Luciano Coelho <coelho@ti.com>

3 files changed, 23 insertions, 3 deletions

diff --git a/drivers/net/wireless/wl12xx/main.c b/drivers/net/wireless/wl12xx/main.c
index c917f69f0069..09cecb336d53 100644
--- a/drivers/net/wireless/wl12xx/main.c
+++ b/drivers/net/wireless/wl12xx/main.c
@@ -814,6 +814,7 @@ static void wl12xx_fw_status(struct wl1271 *wl,
         struct timespec ts;
         u32 old_tx_blk_count = wl->tx_blocks_available;
         int avail, freed_blocks;
+        int i;
 
         wl1271_raw_read(wl, FW_STATUS_ADDR, status, sizeof(*status), false);
 
@@ -824,6 +825,15 @@ static void wl12xx_fw_status(struct wl1271 *wl,
                      status->drv_rx_counter,
                      status->tx_results_counter);
 
+        for (i = 0; i < NUM_TX_QUEUES; i++) {
+                /* prevent wrap-around in freed-packets counter */
+                wl->tx_allocated_pkts -=
+                                (status->tx_released_pkts[i] -
+                                wl->tx_pkts_freed[i]) & 0xff;
+
+                wl->tx_pkts_freed[i] = status->tx_released_pkts[i];
+        }
+
         freed_blocks = le32_to_cpu(status->total_released_blks) -
                        wl->tx_blocks_freed;
         wl->tx_blocks_freed = le32_to_cpu(status->total_released_blks);
@@ -1934,7 +1944,7 @@ out:
 static void __wl1271_op_remove_interface(struct wl1271 *wl,
                                          bool reset_tx_queues)
 {
-        int ret;
+        int ret, i;
 
         wl1271_debug(DEBUG_MAC80211, "mac80211 remove interface");
 
@@ -2050,6 +2060,10 @@ deinit:
 
         wl->tx_blocks_freed = 0;
 
+        wl->tx_allocated_pkts = 0;
+        for (i = 0; i < NUM_TX_QUEUES; i++)
+                wl->tx_pkts_freed[i] = 0;
+
         wl1271_debugfs_reset(wl);
 
         kfree(wl->fw_status);
diff --git a/drivers/net/wireless/wl12xx/tx.c b/drivers/net/wireless/wl12xx/tx.c
index 8fdffd08d492..7dd6d8b94f64 100644
--- a/drivers/net/wireless/wl12xx/tx.c
+++ b/drivers/net/wireless/wl12xx/tx.c
@@ -242,6 +242,8 @@ static int wl1271_tx_allocate(struct wl1271 *wl, struct sk_buff *skb, u32 extra,
                 wl->tx_blocks_available -= total_blocks;
                 wl->tx_allocated_blocks += total_blocks;
 
+                wl->tx_allocated_pkts++;
+
                 if (wl->bss_type == BSS_TYPE_AP_BSS)
                         wl->links[hlid].allocated_blks += total_blocks;
 
diff --git a/drivers/net/wireless/wl12xx/wl12xx.h b/drivers/net/wireless/wl12xx/wl12xx.h
index 416d68ed95cf..24b40251535b 100644
--- a/drivers/net/wireless/wl12xx/wl12xx.h
+++ b/drivers/net/wireless/wl12xx/wl12xx.h
@@ -268,8 +268,8 @@ struct wl12xx_fw_status {
         /* Size (in Memory Blocks) of TX pool */
         __le32 tx_total;
 
-        /* Cumulative counter of released mem-blocks per AC */
-        u8 tx_released_blks[NUM_TX_QUEUES];
+        /* Cumulative counter of released packets per AC */
+        u8 tx_released_pkts[NUM_TX_QUEUES];
 
         /* Cumulative counter of freed MBs per HLID */
         u8 tx_lnk_free_blks[WL12XX_MAX_LINKS];
@@ -422,6 +422,10 @@ struct wl1271 {
         u32 tx_allocated_blocks;
         u32 tx_results_count;
 
+        /* Accounting for allocated / available Tx packets in HW */
+        u32 tx_pkts_freed[NUM_TX_QUEUES];
+        u32 tx_allocated_pkts;
+
         /* Transmitted TX packets counter for chipset interface */
         u32 tx_packets_count;