wl1271: Support firmware RX packet aggregation

Instead of retrieving one packet at a time from the firmware, try to
retrieve all available packets at once.
This optimization decreases the number of transactions, which saves
CPU cycles and increases network throughput.

Signed-off-by: Ido Yariv <ido@wizery.com>
Tested-by: Juuso Oikarinen <juuso.oikarinen@nokia.com>
Signed-off-by: Luciano Coelho <luciano.coelho@nokia.com>

1 files changed, 14 insertions, 1 deletions

diff --git a/drivers/net/wireless/wl12xx/wl1271_main.c b/drivers/net/wireless/wl12xx/wl1271_main.c
index cb18f22bbc5c..8071da10dbc9 100644
--- a/drivers/net/wireless/wl12xx/wl1271_main.c
+++ b/drivers/net/wireless/wl12xx/wl1271_main.c
@@ -2459,6 +2459,7 @@ struct ieee80211_hw *wl1271_alloc_hw(void)
         struct platform_device *plat_dev = NULL;
         struct wl1271 *wl;
         int i, ret;
+        unsigned int order;
 
         hw = ieee80211_alloc_hw(sizeof(*wl), &wl1271_ops);
         if (!hw) {
@@ -2517,11 +2518,18 @@ struct ieee80211_hw *wl1271_alloc_hw(void)
 
         wl1271_debugfs_init(wl);
 
+        order = get_order(WL1271_AGGR_BUFFER_SIZE);
+        wl->aggr_buf = (u8 *)__get_free_pages(GFP_KERNEL, order);
+        if (!wl->aggr_buf) {
+                ret = -ENOMEM;
+                goto err_hw;
+        }
+
         /* Register platform device */
         ret = platform_device_register(wl->plat_dev);
         if (ret) {
                 wl1271_error("couldn't register platform device");
-                goto err_hw;
+                goto err_aggr;
         }
         dev_set_drvdata(&wl->plat_dev->dev, wl);
 
@@ -2547,6 +2555,9 @@ err_bt_coex_state:
 err_platform:
         platform_device_unregister(wl->plat_dev);
 
+err_aggr:
+        free_pages((unsigned long)wl->aggr_buf, order);
+
 err_hw:
         wl1271_debugfs_exit(wl);
         kfree(plat_dev);
@@ -2563,6 +2574,8 @@ EXPORT_SYMBOL_GPL(wl1271_alloc_hw);
 int wl1271_free_hw(struct wl1271 *wl)
 {
         platform_device_unregister(wl->plat_dev);
+        free_pages((unsigned long)wl->aggr_buf,
+                        get_order(WL1271_AGGR_BUFFER_SIZE));
         kfree(wl->plat_dev);
 
         wl1271_debugfs_exit(wl);