From 53d67a50cd17aca120dff20eb2a93e1665361688 Mon Sep 17 00:00:00 2001
From: Arik Nemtsov <arik@wizery.com>
Date: Mon, 12 Dec 2011 11:32:37 +0200
Subject: [PATCH] wlcore/wl12xx: split Tx completion to immediate/delayed

One chip family employs immediate Tx completion, where knowledge of
completed packets is given as part of the FW status. Another is only
notified of Tx completion via the FW status, and has to read the
completion status of the packets from a different location.

Implement the wl12xx tx completion as a delayed Tx completion.

Signed-off-by: Arik Nemtsov <arik@wizery.com>
Signed-off-by: Luciano Coelho <coelho@ti.com>
---
 drivers/net/wireless/ti/wl12xx/main.c   | 10 ++++++++++
 drivers/net/wireless/ti/wlcore/hw_ops.h | 12 ++++++++++++
 drivers/net/wireless/ti/wlcore/main.c   |  8 +++++---
 drivers/net/wireless/ti/wlcore/tx.c     |  1 +
 drivers/net/wireless/ti/wlcore/wlcore.h |  2 ++
 5 files changed, 30 insertions(+), 3 deletions(-)

diff --git a/drivers/net/wireless/ti/wl12xx/main.c b/drivers/net/wireless/ti/wl12xx/main.c
index 5f81aaf19d97..6b187d066c51 100644
--- a/drivers/net/wireless/ti/wl12xx/main.c
+++ b/drivers/net/wireless/ti/wl12xx/main.c
@@ -789,6 +789,14 @@ static u32 wl12xx_get_rx_packet_len(struct wl1271 *wl, void *rx_data,
 	return data_len - sizeof(*desc) - desc->pad_len;
 }
 
+static void wl12xx_tx_delayed_compl(struct wl1271 *wl)
+{
+	if (wl->fw_status->tx_results_counter == (wl->tx_results_count & 0xff))
+		return;
+
+	wl1271_tx_complete(wl);
+}
+
 static bool wl12xx_mac_in_fuse(struct wl1271 *wl)
 {
 	bool supported = false;
@@ -862,6 +870,8 @@ static struct wlcore_ops wl12xx_ops = {
 	.set_tx_desc_data_len	= wl12xx_set_tx_desc_data_len,
 	.get_rx_buf_align	= wl12xx_get_rx_buf_align,
 	.get_rx_packet_len	= wl12xx_get_rx_packet_len,
+	.tx_immediate_compl	= NULL,
+	.tx_delayed_compl	= wl12xx_tx_delayed_compl,
 	.get_pg_ver		= wl12xx_get_pg_ver,
 	.get_mac		= wl12xx_get_mac,
 };
diff --git a/drivers/net/wireless/ti/wlcore/hw_ops.h b/drivers/net/wireless/ti/wlcore/hw_ops.h
index 22615a8f1a40..9fc64295293f 100644
--- a/drivers/net/wireless/ti/wlcore/hw_ops.h
+++ b/drivers/net/wireless/ti/wlcore/hw_ops.h
@@ -81,4 +81,16 @@ wlcore_hw_get_rx_packet_len(struct wl1271 *wl, void *rx_data, u32 data_len)
 	return wl->ops->get_rx_packet_len(wl, rx_data, data_len);
 }
 
+static inline void wlcore_hw_tx_delayed_compl(struct wl1271 *wl)
+{
+	if (wl->ops->tx_delayed_compl)
+		wl->ops->tx_delayed_compl(wl);
+}
+
+static inline void wlcore_hw_tx_immediate_compl(struct wl1271 *wl)
+{
+	if (wl->ops->tx_immediate_compl)
+		wl->ops->tx_immediate_compl(wl);
+}
+
 #endif
diff --git a/drivers/net/wireless/ti/wlcore/main.c b/drivers/net/wireless/ti/wlcore/main.c
index 3f558d5a43e3..0392166c4309 100644
--- a/drivers/net/wireless/ti/wlcore/main.c
+++ b/drivers/net/wireless/ti/wlcore/main.c
@@ -49,6 +49,7 @@
 #include "boot.h"
 #include "testmode.h"
 #include "scan.h"
+#include "hw_ops.h"
 
 #define WL1271_BOOT_RETRIES 3
 
@@ -933,6 +934,9 @@ static irqreturn_t wl1271_irq(int irq, void *cookie)
 		smp_mb__after_clear_bit();
 
 		wl12xx_fw_status(wl, wl->fw_status);
+
+		wlcore_hw_tx_immediate_compl(wl);
+
 		intr = le32_to_cpu(wl->fw_status->intr);
 		intr &= WL1271_INTR_MASK;
 		if (!intr) {
@@ -969,9 +973,7 @@ static irqreturn_t wl1271_irq(int irq, void *cookie)
 			}
 
 			/* check for tx results */
-			if (wl->fw_status->tx_results_counter !=
-			    (wl->tx_results_count & 0xff))
-				wl1271_tx_complete(wl);
+			wlcore_hw_tx_delayed_compl(wl);
 
 			/* Make sure the deferred queues don't get too long */
 			defer_count = skb_queue_len(&wl->deferred_tx_queue) +
diff --git a/drivers/net/wireless/ti/wlcore/tx.c b/drivers/net/wireless/ti/wlcore/tx.c
index 1fabc482ca2b..d1811b8b5146 100644
--- a/drivers/net/wireless/ti/wlcore/tx.c
+++ b/drivers/net/wireless/ti/wlcore/tx.c
@@ -905,6 +905,7 @@ void wl1271_tx_complete(struct wl1271 *wl)
 		wl->tx_results_count++;
 	}
 }
+EXPORT_SYMBOL(wl1271_tx_complete);
 
 void wl1271_tx_reset_link_queues(struct wl1271 *wl, u8 hlid)
 {
diff --git a/drivers/net/wireless/ti/wlcore/wlcore.h b/drivers/net/wireless/ti/wlcore/wlcore.h
index 664df3216bbf..29b39f9b746a 100644
--- a/drivers/net/wireless/ti/wlcore/wlcore.h
+++ b/drivers/net/wireless/ti/wlcore/wlcore.h
@@ -51,6 +51,8 @@ struct wlcore_ops {
 	void (*prepare_read)(struct wl1271 *wl, u32 rx_desc, u32 len);
 	u32 (*get_rx_packet_len)(struct wl1271 *wl, void *rx_data,
 				 u32 data_len);
+	void (*tx_delayed_compl)(struct wl1271 *wl);
+	void (*tx_immediate_compl)(struct wl1271 *wl);
 	s8 (*get_pg_ver)(struct wl1271 *wl);
 	void (*get_mac)(struct wl1271 *wl);
 };