wlcore/wl12xx: set the number of Tx descriptors per chip family

Each chip family can have a different amount of Tx descriptors. These
are set on init.
Signed-off-by: Arik Nemtsov <arik@wizery.com>
Signed-off-by: Luciano Coelho <coelho@ti.com>

drivers/net/wireless/ti/wl12xx/main.c

@@ -674,6 +674,7 @@ static int __devinit wl12xx_probe(struct platform_device *pdev)
 	wl->ops = &wl12xx_ops;
 	wl->ptable = wl12xx_ptable;
 	wl->rtable = wl12xx_rtable;
+	wl->num_tx_desc = 16;
 
 	return wlcore_probe(wl, pdev);
 }

drivers/net/wireless/ti/wlcore/acx.c

@@ -978,7 +978,7 @@ int wl12xx_acx_mem_cfg(struct wl1271 *wl)
 	mem_conf->rx_mem_block_num = mem->rx_block_num;
 	mem_conf->tx_min_mem_block_num = mem->tx_min_block_num;
 	mem_conf->num_ssid_profiles = mem->ssid_profiles;
-	mem_conf->total_tx_descriptors = cpu_to_le32(ACX_TX_DESCRIPTORS);
+	mem_conf->total_tx_descriptors = cpu_to_le32(wl->num_tx_desc);
 	mem_conf->dyn_mem_enable = mem->dynamic_memory;
 	mem_conf->tx_free_req = mem->min_req_tx_blocks;
 	mem_conf->rx_free_req = mem->min_req_rx_blocks;

drivers/net/wireless/ti/wlcore/main.c

@@ -5269,7 +5269,7 @@ struct ieee80211_hw *wlcore_alloc_hw(size_t priv_size)
 	__set_bit(WL12XX_SYSTEM_HLID, wl->links_map);
 
 	memset(wl->tx_frames_map, 0, sizeof(wl->tx_frames_map));
-	for (i = 0; i < ACX_TX_DESCRIPTORS; i++)
+	for (i = 0; i < wl->num_tx_desc; i++)
 		wl->tx_frames[i] = NULL;
 
 	spin_lock_init(&wl->wl_lock);
@@ -5411,6 +5411,8 @@ int __devinit wlcore_probe(struct wl1271 *wl, struct platform_device *pdev)
 		goto out_free_hw;
 	}
 
+	BUG_ON(wl->num_tx_desc > WLCORE_MAX_TX_DESCRIPTORS);
+
 	wl->irq = platform_get_irq(pdev, 0);
 	wl->ref_clock = pdata->board_ref_clock;
 	wl->tcxo_clock = pdata->board_tcxo_clock;

drivers/net/wireless/ti/wlcore/tx.c

@@ -61,8 +61,8 @@ static int wl1271_alloc_tx_id(struct wl1271 *wl, struct sk_buff *skb)
 {
 	int id;
 
-	id = find_first_zero_bit(wl->tx_frames_map, ACX_TX_DESCRIPTORS);
-	if (id >= ACX_TX_DESCRIPTORS)
+	id = find_first_zero_bit(wl->tx_frames_map, wl->num_tx_desc);
+	if (id >= wl->num_tx_desc)
 		return -EBUSY;
 
 	__set_bit(id, wl->tx_frames_map);
@@ -74,7 +74,7 @@ static int wl1271_alloc_tx_id(struct wl1271 *wl, struct sk_buff *skb)
 static void wl1271_free_tx_id(struct wl1271 *wl, int id)
 {
 	if (__test_and_clear_bit(id, wl->tx_frames_map)) {
-		if (unlikely(wl->tx_frames_cnt == ACX_TX_DESCRIPTORS))
+		if (unlikely(wl->tx_frames_cnt == wl->num_tx_desc))
 			clear_bit(WL1271_FLAG_FW_TX_BUSY, &wl->flags);
 
 		wl->tx_frames[id] = NULL;
@@ -818,7 +818,7 @@ static void wl1271_tx_complete_packet(struct wl1271 *wl,
 	u8 retries = 0;
 
 	/* check for id legality */
-	if (unlikely(id >= ACX_TX_DESCRIPTORS || wl->tx_frames[id] == NULL)) {
+	if (unlikely(id >= wl->num_tx_desc || wl->tx_frames[id] == NULL)) {
 		wl1271_warning("TX result illegal id: %d", id);
 		return;
 	}
@@ -1011,7 +1011,7 @@ void wl12xx_tx_reset(struct wl1271 *wl, bool reset_tx_queues)
 	if (reset_tx_queues)
 		wl1271_handle_tx_low_watermark(wl);
 
-	for (i = 0; i < ACX_TX_DESCRIPTORS; i++) {
+	for (i = 0; i < wl->num_tx_desc; i++) {
 		if (wl->tx_frames[i] == NULL)
 			continue;
 

drivers/net/wireless/ti/wlcore/wl12xx.h

@@ -89,8 +89,6 @@
 #define WL1271_AP_BSS_INDEX        0
 #define WL1271_AP_DEF_BEACON_EXP   20
 
-#define ACX_TX_DESCRIPTORS         16
-
 #define WL1271_AGGR_BUFFER_SIZE (4 * PAGE_SIZE)
 
 enum wl1271_state {

drivers/net/wireless/ti/wlcore/wlcore.h

@@ -27,6 +27,9 @@
 #include "wl12xx.h"
 #include "event.h"
 
+/* The maximum number of Tx descriptors in all chip families */
+#define WLCORE_MAX_TX_DESCRIPTORS 32
+
 struct wlcore_ops {
 	int (*identify_chip)(struct wl1271 *wl);
 	int (*boot)(struct wl1271 *wl);
@@ -174,8 +177,8 @@ struct wl1271 {
 	struct workqueue_struct *freezable_wq;
 
 	/* Pending TX frames */
-	unsigned long tx_frames_map[BITS_TO_LONGS(ACX_TX_DESCRIPTORS)];
-	struct sk_buff *tx_frames[ACX_TX_DESCRIPTORS];
+	unsigned long tx_frames_map[BITS_TO_LONGS(WLCORE_MAX_TX_DESCRIPTORS)];
+	struct sk_buff *tx_frames[WLCORE_MAX_TX_DESCRIPTORS];
 	int tx_frames_cnt;
 
 	/* FW Rx counter */
@@ -303,6 +306,9 @@ struct wl1271 {
 
 	/* per-chip-family private structure */
 	void *priv;
+
+	/* number of TX descriptors the HW supports. */
+	u32 num_tx_desc;
 };
 
 int __devinit wlcore_probe(struct wl1271 *wl, struct platform_device *pdev);