b43: finish removal of pio support

As suggested in "b43: Remove PIO support"...

Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 0 insertions, 652 deletions

diff --git a/drivers/net/wireless/b43/pio.c b/drivers/net/wireless/b43/pio.c
deleted file mode 100644
index 67752a28eb9..00000000000
--- a/drivers/net/wireless/b43/pio.c
+++ /dev/null
@@ -1,652 +0,0 @@
-/*
-
-  Broadcom B43 wireless driver
-
-  PIO Transmission
-
-  Copyright (c) 2005 Michael Buesch <mb@bu3sch.de>
-
-  This program is free software; you can redistribute it and/or modify
-  it under the terms of the GNU General Public License as published by
-  the Free Software Foundation; either version 2 of the License, or
-  (at your option) any later version.
-
-  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; see the file COPYING.  If not, write to
-  the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor,
-  Boston, MA 02110-1301, USA.
-
-*/
-
-#include "b43.h"
-#include "pio.h"
-#include "main.h"
-#include "xmit.h"
-
-#include <linux/delay.h>
-
-static void tx_start(struct b43_pioqueue *queue)
-{
-	b43_pio_write(queue, B43_PIO_TXCTL, B43_PIO_TXCTL_INIT);
-}
-
-static void tx_octet(struct b43_pioqueue *queue, u8 octet)
-{
-	if (queue->need_workarounds) {
-		b43_pio_write(queue, B43_PIO_TXDATA, octet);
-		b43_pio_write(queue, B43_PIO_TXCTL, B43_PIO_TXCTL_WRITELO);
-	} else {
-		b43_pio_write(queue, B43_PIO_TXCTL, B43_PIO_TXCTL_WRITELO);
-		b43_pio_write(queue, B43_PIO_TXDATA, octet);
-	}
-}
-
-static u16 tx_get_next_word(const u8 * txhdr,
-			    const u8 * packet,
-			    size_t txhdr_size, unsigned int *pos)
-{
-	const u8 *source;
-	unsigned int i = *pos;
-	u16 ret;
-
-	if (i < txhdr_size) {
-		source = txhdr;
-	} else {
-		source = packet;
-		i -= txhdr_size;
-	}
-	ret = le16_to_cpu(*((__le16 *)(source + i)));
-	*pos += 2;
-
-	return ret;
-}
-
-static void tx_data(struct b43_pioqueue *queue,
-		    u8 * txhdr, const u8 * packet, unsigned int octets)
-{
-	u16 data;
-	unsigned int i = 0;
-
-	if (queue->need_workarounds) {
-		data = tx_get_next_word(txhdr, packet,
-					sizeof(struct b43_txhdr_fw4), &i);
-		b43_pio_write(queue, B43_PIO_TXDATA, data);
-	}
-	b43_pio_write(queue, B43_PIO_TXCTL,
-		      B43_PIO_TXCTL_WRITELO | B43_PIO_TXCTL_WRITEHI);
-	while (i < octets - 1) {
-		data = tx_get_next_word(txhdr, packet,
-					sizeof(struct b43_txhdr_fw4), &i);
-		b43_pio_write(queue, B43_PIO_TXDATA, data);
-	}
-	if (octets % 2)
-		tx_octet(queue,
-			 packet[octets - sizeof(struct b43_txhdr_fw4) - 1]);
-}
-
-static void tx_complete(struct b43_pioqueue *queue, struct sk_buff *skb)
-{
-	if (queue->need_workarounds) {
-		b43_pio_write(queue, B43_PIO_TXDATA, skb->data[skb->len - 1]);
-		b43_pio_write(queue, B43_PIO_TXCTL,
-			      B43_PIO_TXCTL_WRITELO | B43_PIO_TXCTL_COMPLETE);
-	} else {
-		b43_pio_write(queue, B43_PIO_TXCTL, B43_PIO_TXCTL_COMPLETE);
-	}
-}
-
-static u16 generate_cookie(struct b43_pioqueue *queue,
-			   struct b43_pio_txpacket *packet)
-{
-	u16 cookie = 0x0000;
-	u16 packetindex;
-
-	/* We use the upper 4 bits for the PIO
-	 * controller ID and the lower 12 bits
-	 * for the packet index (in the cache).
-	 */
-	switch (queue->mmio_base) {
-	case B43_MMIO_PIO1_BASE:
-		break;
-	case B43_MMIO_PIO2_BASE:
-		cookie = 0x1000;
-		break;
-	case B43_MMIO_PIO3_BASE:
-		cookie = 0x2000;
-		break;
-	case B43_MMIO_PIO4_BASE:
-		cookie = 0x3000;
-		break;
-	default:
-		B43_WARN_ON(1);
-	}
-	packetindex = packet->index;
-	B43_WARN_ON(packetindex & ~0x0FFF);
-	cookie |= (u16) packetindex;
-
-	return cookie;
-}
-
-static
-struct b43_pioqueue *parse_cookie(struct b43_wldev *dev,
-				  u16 cookie, struct b43_pio_txpacket **packet)
-{
-	struct b43_pio *pio = &dev->pio;
-	struct b43_pioqueue *queue = NULL;
-	int packetindex;
-
-	switch (cookie & 0xF000) {
-	case 0x0000:
-		queue = pio->queue0;
-		break;
-	case 0x1000:
-		queue = pio->queue1;
-		break;
-	case 0x2000:
-		queue = pio->queue2;
-		break;
-	case 0x3000:
-		queue = pio->queue3;
-		break;
-	default:
-		B43_WARN_ON(1);
-	}
-	packetindex = (cookie & 0x0FFF);
-	B43_WARN_ON(!(packetindex >= 0 && packetindex < B43_PIO_MAXTXPACKETS));
-	*packet = &(queue->tx_packets_cache[packetindex]);
-
-	return queue;
-}
-
-union txhdr_union {
-	struct b43_txhdr_fw4 txhdr_fw4;
-};
-
-static void pio_tx_write_fragment(struct b43_pioqueue *queue,
-				  struct sk_buff *skb,
-				  struct b43_pio_txpacket *packet,
-				  size_t txhdr_size)
-{
-	union txhdr_union txhdr_data;
-	u8 *txhdr = NULL;
-	unsigned int octets;
-
-	txhdr = (u8 *) (&txhdr_data.txhdr_fw4);
-
-	B43_WARN_ON(skb_shinfo(skb)->nr_frags);
-	b43_generate_txhdr(queue->dev,
-			   txhdr, skb->data, skb->len,
-			   &packet->txstat.control,
-			   generate_cookie(queue, packet));
-
-	tx_start(queue);
-	octets = skb->len + txhdr_size;
-	if (queue->need_workarounds)
-		octets--;
-	tx_data(queue, txhdr, (u8 *) skb->data, octets);
-	tx_complete(queue, skb);
-}
-
-static void free_txpacket(struct b43_pio_txpacket *packet)
-{
-	struct b43_pioqueue *queue = packet->queue;
-
-	if (packet->skb)
-		dev_kfree_skb_any(packet->skb);
-	list_move(&packet->list, &queue->txfree);
-	queue->nr_txfree++;
-}
-
-static int pio_tx_packet(struct b43_pio_txpacket *packet)
-{
-	struct b43_pioqueue *queue = packet->queue;
-	struct sk_buff *skb = packet->skb;
-	u16 octets;
-
-	octets = (u16) skb->len + sizeof(struct b43_txhdr_fw4);
-	if (queue->tx_devq_size < octets) {
-		b43warn(queue->dev->wl, "PIO queue too small. "
-			"Dropping packet.\n");
-		/* Drop it silently (return success) */
-		free_txpacket(packet);
-		return 0;
-	}
-	B43_WARN_ON(queue->tx_devq_packets > B43_PIO_MAXTXDEVQPACKETS);
-	B43_WARN_ON(queue->tx_devq_used > queue->tx_devq_size);
-	/* Check if there is sufficient free space on the device
-	 * TX queue. If not, return and let the TX tasklet
-	 * retry later.
-	 */
-	if (queue->tx_devq_packets == B43_PIO_MAXTXDEVQPACKETS)
-		return -EBUSY;
-	if (queue->tx_devq_used + octets > queue->tx_devq_size)
-		return -EBUSY;
-	/* Now poke the device. */
-	pio_tx_write_fragment(queue, skb, packet, sizeof(struct b43_txhdr_fw4));
-
-	/* Account for the packet size.
-	 * (We must not overflow the device TX queue)
-	 */
-	queue->tx_devq_packets++;
-	queue->tx_devq_used += octets;
-
-	/* Transmission started, everything ok, move the
-	 * packet to the txrunning list.
-	 */
-	list_move_tail(&packet->list, &queue->txrunning);
-
-	return 0;
-}
-
-static void tx_tasklet(unsigned long d)
-{
-	struct b43_pioqueue *queue = (struct b43_pioqueue *)d;
-	struct b43_wldev *dev = queue->dev;
-	unsigned long flags;
-	struct b43_pio_txpacket *packet, *tmp_packet;
-	int err;
-	u16 txctl;
-
-	spin_lock_irqsave(&dev->wl->irq_lock, flags);
-	if (queue->tx_frozen)
-		goto out_unlock;
-	txctl = b43_pio_read(queue, B43_PIO_TXCTL);
-	if (txctl & B43_PIO_TXCTL_SUSPEND)
-		goto out_unlock;
-
-	list_for_each_entry_safe(packet, tmp_packet, &queue->txqueue, list) {
-		/* Try to transmit the packet. This can fail, if
-		 * the device queue is full. In case of failure, the
-		 * packet is left in the txqueue.
-		 * If transmission succeed, the packet is moved to txrunning.
-		 * If it is impossible to transmit the packet, it
-		 * is dropped.
-		 */
-		err = pio_tx_packet(packet);
-		if (err)
-			break;
-	}
-      out_unlock:
-	spin_unlock_irqrestore(&dev->wl->irq_lock, flags);
-}
-
-static void setup_txqueues(struct b43_pioqueue *queue)
-{
-	struct b43_pio_txpacket *packet;
-	int i;
-
-	queue->nr_txfree = B43_PIO_MAXTXPACKETS;
-	for (i = 0; i < B43_PIO_MAXTXPACKETS; i++) {
-		packet = &(queue->tx_packets_cache[i]);
-
-		packet->queue = queue;
-		INIT_LIST_HEAD(&packet->list);
-		packet->index = i;
-
-		list_add(&packet->list, &queue->txfree);
-	}
-}
-
-static
-struct b43_pioqueue *b43_setup_pioqueue(struct b43_wldev *dev,
-					u16 pio_mmio_base)
-{
-	struct b43_pioqueue *queue;
-	u16 qsize;
-
-	queue = kzalloc(sizeof(*queue), GFP_KERNEL);
-	if (!queue)
-		goto out;
-
-	queue->dev = dev;
-	queue->mmio_base = pio_mmio_base;
-	queue->need_workarounds = (dev->dev->id.revision < 3);
-
-	INIT_LIST_HEAD(&queue->txfree);
-	INIT_LIST_HEAD(&queue->txqueue);
-	INIT_LIST_HEAD(&queue->txrunning);
-	tasklet_init(&queue->txtask, tx_tasklet, (unsigned long)queue);
-
-	b43_write32(dev, B43_MMIO_MACCTL, b43_read32(dev, B43_MMIO_MACCTL)
-		    & ~B43_MACCTL_BE);
-
-	qsize = b43_read16(dev, queue->mmio_base + B43_PIO_TXQBUFSIZE);
-	if (qsize == 0) {
-		b43err(dev->wl, "This card does not support PIO "
-		       "operation mode. Please use DMA mode "
-		       "(module parameter pio=0).\n");
-		goto err_freequeue;
-	}
-	if (qsize <= B43_PIO_TXQADJUST) {
-		b43err(dev->wl, "PIO tx device-queue too small (%u)\n", qsize);
-		goto err_freequeue;
-	}
-	qsize -= B43_PIO_TXQADJUST;
-	queue->tx_devq_size = qsize;
-
-	setup_txqueues(queue);
-
-      out:
-	return queue;
-
-      err_freequeue:
-	kfree(queue);
-	queue = NULL;
-	goto out;
-}
-
-static void cancel_transfers(struct b43_pioqueue *queue)
-{
-	struct b43_pio_txpacket *packet, *tmp_packet;
-
-	tasklet_disable(&queue->txtask);
-
-	list_for_each_entry_safe(packet, tmp_packet, &queue->txrunning, list)
-	    free_txpacket(packet);
-	list_for_each_entry_safe(packet, tmp_packet, &queue->txqueue, list)
-	    free_txpacket(packet);
-}
-
-static void b43_destroy_pioqueue(struct b43_pioqueue *queue)
-{
-	if (!queue)
-		return;
-
-	cancel_transfers(queue);
-	kfree(queue);
-}
-
-void b43_pio_free(struct b43_wldev *dev)
-{
-	struct b43_pio *pio;
-
-	if (!b43_using_pio(dev))
-		return;
-	pio = &dev->pio;
-
-	b43_destroy_pioqueue(pio->queue3);
-	pio->queue3 = NULL;
-	b43_destroy_pioqueue(pio->queue2);
-	pio->queue2 = NULL;
-	b43_destroy_pioqueue(pio->queue1);
-	pio->queue1 = NULL;
-	b43_destroy_pioqueue(pio->queue0);
-	pio->queue0 = NULL;
-}
-
-int b43_pio_init(struct b43_wldev *dev)
-{
-	struct b43_pio *pio = &dev->pio;
-	struct b43_pioqueue *queue;
-	int err = -ENOMEM;
-
-	queue = b43_setup_pioqueue(dev, B43_MMIO_PIO1_BASE);
-	if (!queue)
-		goto out;
-	pio->queue0 = queue;
-
-	queue = b43_setup_pioqueue(dev, B43_MMIO_PIO2_BASE);
-	if (!queue)
-		goto err_destroy0;
-	pio->queue1 = queue;
-
-	queue = b43_setup_pioqueue(dev, B43_MMIO_PIO3_BASE);
-	if (!queue)
-		goto err_destroy1;
-	pio->queue2 = queue;
-
-	queue = b43_setup_pioqueue(dev, B43_MMIO_PIO4_BASE);
-	if (!queue)
-		goto err_destroy2;
-	pio->queue3 = queue;
-
-	if (dev->dev->id.revision < 3)
-		dev->irq_savedstate |= B43_IRQ_PIO_WORKAROUND;
-
-	b43dbg(dev->wl, "PIO initialized\n");
-	err = 0;
-      out:
-	return err;
-
-      err_destroy2:
-	b43_destroy_pioqueue(pio->queue2);
-	pio->queue2 = NULL;
-      err_destroy1:
-	b43_destroy_pioqueue(pio->queue1);
-	pio->queue1 = NULL;
-      err_destroy0:
-	b43_destroy_pioqueue(pio->queue0);
-	pio->queue0 = NULL;
-	goto out;
-}
-
-int b43_pio_tx(struct b43_wldev *dev,
-	       struct sk_buff *skb, struct ieee80211_tx_control *ctl)
-{
-	struct b43_pioqueue *queue = dev->pio.queue1;
-	struct b43_pio_txpacket *packet;
-
-	B43_WARN_ON(queue->tx_suspended);
-	B43_WARN_ON(list_empty(&queue->txfree));
-
-	packet = list_entry(queue->txfree.next, struct b43_pio_txpacket, list);
-	packet->skb = skb;
-
-	memset(&packet->txstat, 0, sizeof(packet->txstat));
-	memcpy(&packet->txstat.control, ctl, sizeof(*ctl));
-
-	list_move_tail(&packet->list, &queue->txqueue);
-	queue->nr_txfree--;
-	queue->nr_tx_packets++;
-	B43_WARN_ON(queue->nr_txfree >= B43_PIO_MAXTXPACKETS);
-
-	tasklet_schedule(&queue->txtask);
-
-	return 0;
-}
-
-void b43_pio_handle_txstatus(struct b43_wldev *dev,
-			     const struct b43_txstatus *status)
-{
-	struct b43_pioqueue *queue;
-	struct b43_pio_txpacket *packet;
-
-	queue = parse_cookie(dev, status->cookie, &packet);
-	if (B43_WARN_ON(!queue))
-		return;
-
-	queue->tx_devq_packets--;
-	queue->tx_devq_used -=
-	    (packet->skb->len + sizeof(struct b43_txhdr_fw4));
-
-	if (status->acked) {
-		packet->txstat.flags |= IEEE80211_TX_STATUS_ACK;
-	} else {
-		if (!(packet->txstat.control.flags & IEEE80211_TXCTL_NO_ACK))
-			packet->txstat.excessive_retries = 1;
-	}
-	if (status->frame_count == 0) {
-		/* The frame was not transmitted at all. */
-		packet->txstat.retry_count = 0;
-	} else
-		packet->txstat.retry_count = status->frame_count - 1;
-	ieee80211_tx_status_irqsafe(dev->wl->hw, packet->skb,
-				    &(packet->txstat));
-	packet->skb = NULL;
-
-	free_txpacket(packet);
-	/* If there are packets on the txqueue, poke the tasklet
-	 * to transmit them.
-	 */
-	if (!list_empty(&queue->txqueue))
-		tasklet_schedule(&queue->txtask);
-}
-
-void b43_pio_get_tx_stats(struct b43_wldev *dev,
-			  struct ieee80211_tx_queue_stats *stats)
-{
-	struct b43_pio *pio = &dev->pio;
-	struct b43_pioqueue *queue;
-	struct ieee80211_tx_queue_stats_data *data;
-
-	queue = pio->queue1;
-	data = &(stats->data[0]);
-	data->len = B43_PIO_MAXTXPACKETS - queue->nr_txfree;
-	data->limit = B43_PIO_MAXTXPACKETS;
-	data->count = queue->nr_tx_packets;
-}
-
-static void pio_rx_error(struct b43_pioqueue *queue,
-			 int clear_buffers, const char *error)
-{
-	int i;
-
-	b43err(queue->dev->wl, "PIO RX error: %s\n", error);
-	b43_pio_write(queue, B43_PIO_RXCTL, B43_PIO_RXCTL_READY);
-	if (clear_buffers) {
-		B43_WARN_ON(queue->mmio_base != B43_MMIO_PIO1_BASE);
-		for (i = 0; i < 15; i++) {
-			/* Dummy read. */
-			b43_pio_read(queue, B43_PIO_RXDATA);
-		}
-	}
-}
-
-void b43_pio_rx(struct b43_pioqueue *queue)
-{
-	__le16 preamble[21] = { 0 };
-	struct b43_rxhdr_fw4 *rxhdr;
-	u16 tmp, len;
-	u32 macstat;
-	int i, preamble_readwords;
-	struct sk_buff *skb;
-
-	tmp = b43_pio_read(queue, B43_PIO_RXCTL);
-	if (!(tmp & B43_PIO_RXCTL_DATAAVAILABLE))
-		return;
-	b43_pio_write(queue, B43_PIO_RXCTL, B43_PIO_RXCTL_DATAAVAILABLE);
-
-	for (i = 0; i < 10; i++) {
-		tmp = b43_pio_read(queue, B43_PIO_RXCTL);
-		if (tmp & B43_PIO_RXCTL_READY)
-			goto data_ready;
-		udelay(10);
-	}
-	b43dbg(queue->dev->wl, "PIO RX timed out\n");
-	return;
-data_ready:
-
-	len = b43_pio_read(queue, B43_PIO_RXDATA);
-	if (unlikely(len > 0x700)) {
-		pio_rx_error(queue, 0, "len > 0x700");
-		return;
-	}
-	if (unlikely(len == 0 && queue->mmio_base != B43_MMIO_PIO4_BASE)) {
-		pio_rx_error(queue, 0, "len == 0");
-		return;
-	}
-	preamble[0] = cpu_to_le16(len);
-	if (queue->mmio_base == B43_MMIO_PIO4_BASE)
-		preamble_readwords = 14 / sizeof(u16);
-	else
-		preamble_readwords = 18 / sizeof(u16);
-	for (i = 0; i < preamble_readwords; i++) {
-		tmp = b43_pio_read(queue, B43_PIO_RXDATA);
-		preamble[i + 1] = cpu_to_le16(tmp);
-	}
-	rxhdr = (struct b43_rxhdr_fw4 *)preamble;
-	macstat = le32_to_cpu(rxhdr->mac_status);
-	if (macstat & B43_RX_MAC_FCSERR) {
-		pio_rx_error(queue,
-			     (queue->mmio_base == B43_MMIO_PIO1_BASE),
-			     "Frame FCS error");
-		return;
-	}
-	if (queue->mmio_base == B43_MMIO_PIO4_BASE) {
-		/* We received an xmit status. */
-		struct b43_hwtxstatus *hw;
-
-		hw = (struct b43_hwtxstatus *)(preamble + 1);
-		b43_handle_hwtxstatus(queue->dev, hw);
-
-		return;
-	}
-
-	skb = dev_alloc_skb(len);
-	if (unlikely(!skb)) {
-		pio_rx_error(queue, 1, "OOM");
-		return;
-	}
-	skb_put(skb, len);
-	for (i = 0; i < len - 1; i += 2) {
-		tmp = b43_pio_read(queue, B43_PIO_RXDATA);
-		*((__le16 *)(skb->data + i)) = cpu_to_le16(tmp);
-	}
-	if (len % 2) {
-		tmp = b43_pio_read(queue, B43_PIO_RXDATA);
-		skb->data[len - 1] = (tmp & 0x00FF);
-/* The specs say the following is required, but
- * it is wrong and corrupts the PLCP. If we don't do
- * this, the PLCP seems to be correct. So ifdef it out for now.
- */
-#if 0
-		if (rxflags2 & B43_RXHDR_FLAGS2_TYPE2FRAME)
-			skb->data[2] = (tmp & 0xFF00) >> 8;
-		else
-			skb->data[0] = (tmp & 0xFF00) >> 8;
-#endif
-	}
-	b43_rx(queue->dev, skb, rxhdr);
-}
-
-void b43_pio_tx_suspend(struct b43_pioqueue *queue)
-{
-	b43_power_saving_ctl_bits(queue->dev, B43_PS_AWAKE);
-	b43_pio_write(queue, B43_PIO_TXCTL, b43_pio_read(queue, B43_PIO_TXCTL)
-		      | B43_PIO_TXCTL_SUSPEND);
-}
-
-void b43_pio_tx_resume(struct b43_pioqueue *queue)
-{
-	b43_pio_write(queue, B43_PIO_TXCTL, b43_pio_read(queue, B43_PIO_TXCTL)
-		      & ~B43_PIO_TXCTL_SUSPEND);
-	b43_power_saving_ctl_bits(queue->dev, 0);
-	tasklet_schedule(&queue->txtask);
-}
-
-void b43_pio_freeze_txqueues(struct b43_wldev *dev)
-{
-	struct b43_pio *pio;
-
-	B43_WARN_ON(!b43_using_pio(dev));
-	pio = &dev->pio;
-	pio->queue0->tx_frozen = 1;
-	pio->queue1->tx_frozen = 1;
-	pio->queue2->tx_frozen = 1;
-	pio->queue3->tx_frozen = 1;
-}
-
-void b43_pio_thaw_txqueues(struct b43_wldev *dev)
-{
-	struct b43_pio *pio;
-
-	B43_WARN_ON(!b43_using_pio(dev));
-	pio = &dev->pio;
-	pio->queue0->tx_frozen = 0;
-	pio->queue1->tx_frozen = 0;
-	pio->queue2->tx_frozen = 0;
-	pio->queue3->tx_frozen = 0;
-	if (!list_empty(&pio->queue0->txqueue))
-		tasklet_schedule(&pio->queue0->txtask);
-	if (!list_empty(&pio->queue1->txqueue))
-		tasklet_schedule(&pio->queue1->txtask);
-	if (!list_empty(&pio->queue2->txqueue))
-		tasklet_schedule(&pio->queue2->txtask);
-	if (!list_empty(&pio->queue3->txqueue))
-		tasklet_schedule(&pio->queue3->txtask);
-}