wl12xx: Moved wl1251 TX path implementation into chip specific files

Moved wl1251 TX path implementation into chip specific files to enable
parallel implementation for the wl1271 TX path.

Signed-off-by: Juuso Oikarinen <juuso.oikarinen@nokia.com>
Signed-off-by: Kalle Valo <kalle.valo@nokia.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 0 insertions, 557 deletions

diff --git a/drivers/net/wireless/wl12xx/tx.c b/drivers/net/wireless/wl12xx/tx.c
deleted file mode 100644
index 62145e205a8c..000000000000
--- a/drivers/net/wireless/wl12xx/tx.c
+++ /dev/null
@@ -1,557 +0,0 @@
-/*
- * This file is part of wl12xx
- *
- * Copyright (c) 1998-2007 Texas Instruments Incorporated
- * Copyright (C) 2008 Nokia Corporation
- *
- * Contact: Kalle Valo <kalle.valo@nokia.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
- * 02110-1301 USA
- *
- */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-
-#include "wl12xx.h"
-#include "reg.h"
-#include "spi.h"
-#include "tx.h"
-#include "ps.h"
-
-static bool wl12xx_tx_double_buffer_busy(struct wl12xx *wl, u32 data_out_count)
-{
-	int used, data_in_count;
-
-	data_in_count = wl->data_in_count;
-
-	if (data_in_count < data_out_count)
-		/* data_in_count has wrapped */
-		data_in_count += TX_STATUS_DATA_OUT_COUNT_MASK + 1;
-
-	used = data_in_count - data_out_count;
-
-	WARN_ON(used < 0);
-	WARN_ON(used > DP_TX_PACKET_RING_CHUNK_NUM);
-
-	if (used >= DP_TX_PACKET_RING_CHUNK_NUM)
-		return true;
-	else
-		return false;
-}
-
-static int wl12xx_tx_path_status(struct wl12xx *wl)
-{
-	u32 status, addr, data_out_count;
-	bool busy;
-
-	addr = wl->data_path->tx_control_addr;
-	status = wl12xx_mem_read32(wl, addr);
-	data_out_count = status & TX_STATUS_DATA_OUT_COUNT_MASK;
-	busy = wl12xx_tx_double_buffer_busy(wl, data_out_count);
-
-	if (busy)
-		return -EBUSY;
-
-	return 0;
-}
-
-static int wl12xx_tx_id(struct wl12xx *wl, struct sk_buff *skb)
-{
-	int i;
-
-	for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
-		if (wl->tx_frames[i] == NULL) {
-			wl->tx_frames[i] = skb;
-			return i;
-		}
-
-	return -EBUSY;
-}
-
-static void wl12xx_tx_control(struct tx_double_buffer_desc *tx_hdr,
-			      struct ieee80211_tx_info *control, u16 fc)
-{
-	*(u16 *)&tx_hdr->control = 0;
-
-	tx_hdr->control.rate_policy = 0;
-
-	/* 802.11 packets */
-	tx_hdr->control.packet_type = 0;
-
-	if (control->flags & IEEE80211_TX_CTL_NO_ACK)
-		tx_hdr->control.ack_policy = 1;
-
-	tx_hdr->control.tx_complete = 1;
-
-	if ((fc & IEEE80211_FTYPE_DATA) &&
-	    ((fc & IEEE80211_STYPE_QOS_DATA) ||
-	     (fc & IEEE80211_STYPE_QOS_NULLFUNC)))
-		tx_hdr->control.qos = 1;
-}
-
-/* RSN + MIC = 8 + 8 = 16 bytes (worst case - AES). */
-#define MAX_MSDU_SECURITY_LENGTH      16
-#define MAX_MPDU_SECURITY_LENGTH      16
-#define WLAN_QOS_HDR_LEN              26
-#define MAX_MPDU_HEADER_AND_SECURITY  (MAX_MPDU_SECURITY_LENGTH + \
-				       WLAN_QOS_HDR_LEN)
-#define HW_BLOCK_SIZE                 252
-static void wl12xx_tx_frag_block_num(struct tx_double_buffer_desc *tx_hdr)
-{
-	u16 payload_len, frag_threshold, mem_blocks;
-	u16 num_mpdus, mem_blocks_per_frag;
-
-	frag_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
-	tx_hdr->frag_threshold = cpu_to_le16(frag_threshold);
-
-	payload_len = tx_hdr->length + MAX_MSDU_SECURITY_LENGTH;
-
-	if (payload_len > frag_threshold) {
-		mem_blocks_per_frag =
-			((frag_threshold + MAX_MPDU_HEADER_AND_SECURITY) /
-			 HW_BLOCK_SIZE) + 1;
-		num_mpdus = payload_len / frag_threshold;
-		mem_blocks = num_mpdus * mem_blocks_per_frag;
-		payload_len -= num_mpdus * frag_threshold;
-		num_mpdus++;
-
-	} else {
-		mem_blocks_per_frag = 0;
-		mem_blocks = 0;
-		num_mpdus = 1;
-	}
-
-	mem_blocks += (payload_len / HW_BLOCK_SIZE) + 1;
-
-	if (num_mpdus > 1)
-		mem_blocks += min(num_mpdus, mem_blocks_per_frag);
-
-	tx_hdr->num_mem_blocks = mem_blocks;
-}
-
-static int wl12xx_tx_fill_hdr(struct wl12xx *wl, struct sk_buff *skb,
-			      struct ieee80211_tx_info *control)
-{
-	struct tx_double_buffer_desc *tx_hdr;
-	struct ieee80211_rate *rate;
-	int id;
-	u16 fc;
-
-	if (!skb)
-		return -EINVAL;
-
-	id = wl12xx_tx_id(wl, skb);
-	if (id < 0)
-		return id;
-
-	fc = *(u16 *)skb->data;
-	tx_hdr = (struct tx_double_buffer_desc *) skb_push(skb,
-							   sizeof(*tx_hdr));
-
-	tx_hdr->length = cpu_to_le16(skb->len - sizeof(*tx_hdr));
-	rate = ieee80211_get_tx_rate(wl->hw, control);
-	tx_hdr->rate = cpu_to_le16(rate->hw_value);
-	tx_hdr->expiry_time = cpu_to_le32(1 << 16);
-	tx_hdr->id = id;
-
-	/* FIXME: how to get the correct queue id? */
-	tx_hdr->xmit_queue = 0;
-
-	wl12xx_tx_control(tx_hdr, control, fc);
-	wl12xx_tx_frag_block_num(tx_hdr);
-
-	return 0;
-}
-
-/* We copy the packet to the target */
-static int wl12xx_tx_send_packet(struct wl12xx *wl, struct sk_buff *skb,
-				 struct ieee80211_tx_info *control)
-{
-	struct tx_double_buffer_desc *tx_hdr;
-	int len;
-	u32 addr;
-
-	if (!skb)
-		return -EINVAL;
-
-	tx_hdr = (struct tx_double_buffer_desc *) skb->data;
-
-	if (control->control.hw_key &&
-	    control->control.hw_key->alg == ALG_TKIP) {
-		int hdrlen;
-		u16 fc;
-		u8 *pos;
-
-		fc = *(u16 *)(skb->data + sizeof(*tx_hdr));
-		tx_hdr->length += WL12XX_TKIP_IV_SPACE;
-
-		hdrlen = ieee80211_hdrlen(fc);
-
-		pos = skb_push(skb, WL12XX_TKIP_IV_SPACE);
-		memmove(pos, pos + WL12XX_TKIP_IV_SPACE,
-			sizeof(*tx_hdr) + hdrlen);
-	}
-
-	/* Revisit. This is a workaround for getting non-aligned packets.
-	   This happens at least with EAPOL packets from the user space.
-	   Our DMA requires packets to be aligned on a 4-byte boundary.
-	*/
-	if (unlikely((long)skb->data & 0x03)) {
-		int offset = (4 - (long)skb->data) & 0x03;
-		wl12xx_debug(DEBUG_TX, "skb offset %d", offset);
-
-		/* check whether the current skb can be used */
-		if (!skb_cloned(skb) && (skb_tailroom(skb) >= offset)) {
-			unsigned char *src = skb->data;
-
-			/* align the buffer on a 4-byte boundary */
-			skb_reserve(skb, offset);
-			memmove(skb->data, src, skb->len);
-		} else {
-			wl12xx_info("No handler, fixme!");
-			return -EINVAL;
-		}
-	}
-
-	/* Our skb->data at this point includes the HW header */
-	len = WL12XX_TX_ALIGN(skb->len);
-
-	if (wl->data_in_count & 0x1)
-		addr = wl->data_path->tx_packet_ring_addr +
-			wl->data_path->tx_packet_ring_chunk_size;
-	else
-		addr = wl->data_path->tx_packet_ring_addr;
-
-	wl12xx_spi_mem_write(wl, addr, skb->data, len);
-
-	wl12xx_debug(DEBUG_TX, "tx id %u skb 0x%p payload %u rate 0x%x",
-		     tx_hdr->id, skb, tx_hdr->length, tx_hdr->rate);
-
-	return 0;
-}
-
-static void wl12xx_tx_trigger(struct wl12xx *wl)
-{
-	u32 data, addr;
-
-	if (wl->data_in_count & 0x1) {
-		addr = ACX_REG_INTERRUPT_TRIG_H;
-		data = INTR_TRIG_TX_PROC1;
-	} else {
-		addr = ACX_REG_INTERRUPT_TRIG;
-		data = INTR_TRIG_TX_PROC0;
-	}
-
-	wl12xx_reg_write32(wl, addr, data);
-
-	/* Bumping data in */
-	wl->data_in_count = (wl->data_in_count + 1) &
-		TX_STATUS_DATA_OUT_COUNT_MASK;
-}
-
-/* caller must hold wl->mutex */
-static int wl12xx_tx_frame(struct wl12xx *wl, struct sk_buff *skb)
-{
-	struct ieee80211_tx_info *info;
-	int ret = 0;
-	u8 idx;
-
-	info = IEEE80211_SKB_CB(skb);
-
-	if (info->control.hw_key) {
-		idx = info->control.hw_key->hw_key_idx;
-		if (unlikely(wl->default_key != idx)) {
-			ret = wl12xx_acx_default_key(wl, idx);
-			if (ret < 0)
-				return ret;
-		}
-	}
-
-	ret = wl12xx_tx_path_status(wl);
-	if (ret < 0)
-		return ret;
-
-	ret = wl12xx_tx_fill_hdr(wl, skb, info);
-	if (ret < 0)
-		return ret;
-
-	ret = wl12xx_tx_send_packet(wl, skb, info);
-	if (ret < 0)
-		return ret;
-
-	wl12xx_tx_trigger(wl);
-
-	return ret;
-}
-
-void wl12xx_tx_work(struct work_struct *work)
-{
-	struct wl12xx *wl = container_of(work, struct wl12xx, tx_work);
-	struct sk_buff *skb;
-	bool woken_up = false;
-	int ret;
-
-	mutex_lock(&wl->mutex);
-
-	if (unlikely(wl->state == WL12XX_STATE_OFF))
-		goto out;
-
-	while ((skb = skb_dequeue(&wl->tx_queue))) {
-		if (!woken_up) {
-			wl12xx_ps_elp_wakeup(wl);
-			woken_up = true;
-		}
-
-		ret = wl12xx_tx_frame(wl, skb);
-		if (ret == -EBUSY) {
-			/* firmware buffer is full, stop queues */
-			wl12xx_debug(DEBUG_TX, "tx_work: fw buffer full, "
-				     "stop queues");
-			ieee80211_stop_queues(wl->hw);
-			wl->tx_queue_stopped = true;
-			skb_queue_head(&wl->tx_queue, skb);
-			goto out;
-		} else if (ret < 0) {
-			dev_kfree_skb(skb);
-			goto out;
-		}
-	}
-
-out:
-	if (woken_up)
-		wl12xx_ps_elp_sleep(wl);
-
-	mutex_unlock(&wl->mutex);
-}
-
-static const char *wl12xx_tx_parse_status(u8 status)
-{
-	/* 8 bit status field, one character per bit plus null */
-	static char buf[9];
-	int i = 0;
-
-	memset(buf, 0, sizeof(buf));
-
-	if (status & TX_DMA_ERROR)
-		buf[i++] = 'm';
-	if (status & TX_DISABLED)
-		buf[i++] = 'd';
-	if (status & TX_RETRY_EXCEEDED)
-		buf[i++] = 'r';
-	if (status & TX_TIMEOUT)
-		buf[i++] = 't';
-	if (status & TX_KEY_NOT_FOUND)
-		buf[i++] = 'k';
-	if (status & TX_ENCRYPT_FAIL)
-		buf[i++] = 'e';
-	if (status & TX_UNAVAILABLE_PRIORITY)
-		buf[i++] = 'p';
-
-	/* bit 0 is unused apparently */
-
-	return buf;
-}
-
-static void wl12xx_tx_packet_cb(struct wl12xx *wl,
-				struct tx_result *result)
-{
-	struct ieee80211_tx_info *info;
-	struct sk_buff *skb;
-	int hdrlen, ret;
-	u8 *frame;
-
-	skb = wl->tx_frames[result->id];
-	if (skb == NULL) {
-		wl12xx_error("SKB for packet %d is NULL", result->id);
-		return;
-	}
-
-	info = IEEE80211_SKB_CB(skb);
-
-	if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) &&
-	    (result->status == TX_SUCCESS))
-		info->flags |= IEEE80211_TX_STAT_ACK;
-
-	info->status.rates[0].count = result->ack_failures + 1;
-	wl->stats.retry_count += result->ack_failures;
-
-	/*
-	 * We have to remove our private TX header before pushing
-	 * the skb back to mac80211.
-	 */
-	frame = skb_pull(skb, sizeof(struct tx_double_buffer_desc));
-	if (info->control.hw_key &&
-	    info->control.hw_key->alg == ALG_TKIP) {
-		hdrlen = ieee80211_get_hdrlen_from_skb(skb);
-		memmove(frame + WL12XX_TKIP_IV_SPACE, frame, hdrlen);
-		skb_pull(skb, WL12XX_TKIP_IV_SPACE);
-	}
-
-	wl12xx_debug(DEBUG_TX, "tx status id %u skb 0x%p failures %u rate 0x%x"
-		     " status 0x%x (%s)",
-		     result->id, skb, result->ack_failures, result->rate,
-		     result->status, wl12xx_tx_parse_status(result->status));
-
-
-	ieee80211_tx_status(wl->hw, skb);
-
-	wl->tx_frames[result->id] = NULL;
-
-	if (wl->tx_queue_stopped) {
-		wl12xx_debug(DEBUG_TX, "cb: queue was stopped");
-
-		skb = skb_dequeue(&wl->tx_queue);
-
-		/* The skb can be NULL because tx_work might have been
-		   scheduled before the queue was stopped making the
-		   queue empty */
-
-		if (skb) {
-			ret = wl12xx_tx_frame(wl, skb);
-			if (ret == -EBUSY) {
-				/* firmware buffer is still full */
-				wl12xx_debug(DEBUG_TX, "cb: fw buffer "
-					     "still full");
-				skb_queue_head(&wl->tx_queue, skb);
-				return;
-			} else if (ret < 0) {
-				dev_kfree_skb(skb);
-				return;
-			}
-		}
-
-		wl12xx_debug(DEBUG_TX, "cb: waking queues");
-		ieee80211_wake_queues(wl->hw);
-		wl->tx_queue_stopped = false;
-	}
-}
-
-/* Called upon reception of a TX complete interrupt */
-void wl12xx_tx_complete(struct wl12xx *wl)
-{
-	int i, result_index, num_complete = 0;
-	struct tx_result result[FW_TX_CMPLT_BLOCK_SIZE], *result_ptr;
-
-	if (unlikely(wl->state != WL12XX_STATE_ON))
-		return;
-
-	/* First we read the result */
-	wl12xx_spi_mem_read(wl, wl->data_path->tx_complete_addr,
-			    result, sizeof(result));
-
-	result_index = wl->next_tx_complete;
-
-	for (i = 0; i < ARRAY_SIZE(result); i++) {
-		result_ptr = &result[result_index];
-
-		if (result_ptr->done_1 == 1 &&
-		    result_ptr->done_2 == 1) {
-			wl12xx_tx_packet_cb(wl, result_ptr);
-
-			result_ptr->done_1 = 0;
-			result_ptr->done_2 = 0;
-
-			result_index = (result_index + 1) &
-				(FW_TX_CMPLT_BLOCK_SIZE - 1);
-			num_complete++;
-		} else {
-			break;
-		}
-	}
-
-	/* Every completed frame needs to be acknowledged */
-	if (num_complete) {
-		/*
-		 * If we've wrapped, we have to clear
-		 * the results in 2 steps.
-		 */
-		if (result_index > wl->next_tx_complete) {
-			/* Only 1 write is needed */
-			wl12xx_spi_mem_write(wl,
-					     wl->data_path->tx_complete_addr +
-					     (wl->next_tx_complete *
-					      sizeof(struct tx_result)),
-					     &result[wl->next_tx_complete],
-					     num_complete *
-					     sizeof(struct tx_result));
-
-
-		} else if (result_index < wl->next_tx_complete) {
-			/* 2 writes are needed */
-			wl12xx_spi_mem_write(wl,
-					     wl->data_path->tx_complete_addr +
-					     (wl->next_tx_complete *
-					      sizeof(struct tx_result)),
-					     &result[wl->next_tx_complete],
-					     (FW_TX_CMPLT_BLOCK_SIZE -
-					      wl->next_tx_complete) *
-					     sizeof(struct tx_result));
-
-			wl12xx_spi_mem_write(wl,
-					     wl->data_path->tx_complete_addr,
-					     result,
-					     (num_complete -
-					      FW_TX_CMPLT_BLOCK_SIZE +
-					      wl->next_tx_complete) *
-					     sizeof(struct tx_result));
-
-		} else {
-			/* We have to write the whole array */
-			wl12xx_spi_mem_write(wl,
-					     wl->data_path->tx_complete_addr,
-					     result,
-					     FW_TX_CMPLT_BLOCK_SIZE *
-					     sizeof(struct tx_result));
-		}
-
-	}
-
-	wl->next_tx_complete = result_index;
-}
-
-/* caller must hold wl->mutex */
-void wl12xx_tx_flush(struct wl12xx *wl)
-{
-	int i;
-	struct sk_buff *skb;
-	struct ieee80211_tx_info *info;
-
-	/* TX failure */
-/* 	control->flags = 0; FIXME */
-
-	while ((skb = skb_dequeue(&wl->tx_queue))) {
-		info = IEEE80211_SKB_CB(skb);
-
-		wl12xx_debug(DEBUG_TX, "flushing skb 0x%p", skb);
-
-		if (!(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS))
-				continue;
-
-		ieee80211_tx_status(wl->hw, skb);
-	}
-
-	for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
-		if (wl->tx_frames[i] != NULL) {
-			skb = wl->tx_frames[i];
-			info = IEEE80211_SKB_CB(skb);
-
-			if (!(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS))
-				continue;
-
-			ieee80211_tx_status(wl->hw, skb);
-			wl->tx_frames[i] = NULL;
-		}
-}