wl18xx: add support to clear FW statistics

This patch calls ACX_CLEAR_STATISTICS to clear the firmware
statistics.  The trigger is a new debugfs file called
clear_fw_statistics in the fw_stats directory.

Signed-off-by: Luciano Coelho <coelho@ti.com>

diff --git a/drivers/net/wireless/ti/wl18xx/acx.c b/drivers/net/wireless/ti/wl18xx/acx.c
index 01ba403..72840e2 100644 (file)
--- a/drivers/net/wireless/ti/wl18xx/acx.c
+++ b/drivers/net/wireless/ti/wl18xx/acx.c
@@ -85,3 +85,27 @@ out:
        kfree(acx);
        return ret;
 }
+
+int wl18xx_acx_clear_statistics(struct wl1271 *wl)
+{
+       struct wl18xx_acx_clear_statistics *acx;
+       int ret = 0;
+
+       wl1271_debug(DEBUG_ACX, "acx clear statistics");
+
+       acx = kzalloc(sizeof(*acx), GFP_KERNEL);
+       if (!acx) {
+               ret = -ENOMEM;
+               goto out;
+       }
+
+       ret = wl1271_cmd_configure(wl, ACX_CLEAR_STATISTICS, acx, sizeof(*acx));
+       if (ret < 0) {
+               wl1271_warning("failed to clear firmware statistics: %d", ret);
+               goto out;
+       }
+
+out:
+       kfree(acx);
+       return ret;
+}

diff --git a/drivers/net/wireless/ti/wl18xx/acx.h b/drivers/net/wireless/ti/wl18xx/acx.h
index 7d74b03..3e5cd9f 100644 (file)
--- a/drivers/net/wireless/ti/wl18xx/acx.h
+++ b/drivers/net/wireless/ti/wl18xx/acx.h
@@ -25,6 +25,10 @@
 #include "../wlcore/wlcore.h"
 #include "../wlcore/acx.h"
 
+enum {
+       ACX_CLEAR_STATISTICS             = 0x0047,
+};
+
 /* numbers of bits the length field takes (add 1 for the actual number) */
 #define WL18XX_HOST_IF_LEN_SIZE_FIELD 15
 
@@ -253,9 +257,14 @@ struct wl18xx_acx_statistics {
        struct wl18xx_acx_mem_stats             mem;
 } __packed;
 
+struct wl18xx_acx_clear_statistics {
+       struct acx_header header;
+};
+
 int wl18xx_acx_host_if_cfg_bitmap(struct wl1271 *wl, u32 host_cfg_bitmap,
                                  u32 sdio_blk_size, u32 extra_mem_blks,
                                  u32 len_field_size);
 int wl18xx_acx_set_checksum_state(struct wl1271 *wl);
+int wl18xx_acx_clear_statistics(struct wl1271 *wl);
 
 #endif /* __WL18XX_ACX_H__ */

diff --git a/drivers/net/wireless/ti/wl18xx/debugfs.c b/drivers/net/wireless/ti/wl18xx/debugfs.c
index 93c625b..468651c 100644 (file)
--- a/drivers/net/wireless/ti/wl18xx/debugfs.c
+++ b/drivers/net/wireless/ti/wl18xx/debugfs.c
@@ -158,6 +158,34 @@ WL18XX_DEBUGFS_FWSTATS_FILE(mem, tx_free_mem_blks, "%u");
 WL18XX_DEBUGFS_FWSTATS_FILE(mem, fwlog_free_mem_blks, "%u");
 WL18XX_DEBUGFS_FWSTATS_FILE(mem, fw_gen_free_mem_blks, "%u");
 
+static ssize_t clear_fw_stats_write(struct file *file,
+                             const char __user *user_buf,
+                             size_t count, loff_t *ppos)
+{
+       struct wl1271 *wl = file->private_data;
+       int ret;
+
+       mutex_lock(&wl->mutex);
+
+       if (wl->state == WL1271_STATE_OFF)
+               goto out;
+
+       ret = wl18xx_acx_clear_statistics(wl);
+       if (ret < 0) {
+               count = ret;
+               goto out;
+       }
+out:
+       mutex_unlock(&wl->mutex);
+       return count;
+}
+
+static const struct file_operations clear_fw_stats_ops = {
+       .write = clear_fw_stats_write,
+       .open = simple_open,
+       .llseek = default_llseek,
+};
+
 int wl18xx_debugfs_add_files(struct wl1271 *wl,
                             struct dentry *rootdir)
 {
@@ -176,6 +204,8 @@ int wl18xx_debugfs_add_files(struct wl1271 *wl,
                goto err;
        }
 
+       DEBUGFS_ADD(clear_fw_stats, stats);
+
        DEBUGFS_FWSTATS_ADD(debug, debug1);
        DEBUGFS_FWSTATS_ADD(debug, debug2);
        DEBUGFS_FWSTATS_ADD(debug, debug3);