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OpenCloudOS-Kernel/drivers/net/wireless/b43/pio.c

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/*
Broadcom B43 wireless driver
PIO data transfer
Copyright (c) 2005-2008 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 "dma.h"
#include "main.h"
#include "xmit.h"
#include <linux/delay.h>
#include <linux/sched.h>
static u16 generate_cookie(struct b43_pio_txqueue *q,
struct b43_pio_txpacket *pack)
{
u16 cookie;
/* Use the upper 4 bits of the cookie as
* PIO controller ID and store the packet index number
* in the lower 12 bits.
* Note that the cookie must never be 0, as this
* is a special value used in RX path.
* It can also not be 0xFFFF because that is special
* for multicast frames.
*/
cookie = (((u16)q->index + 1) << 12);
cookie |= pack->index;
return cookie;
}
static
struct b43_pio_txqueue *parse_cookie(struct b43_wldev *dev,
u16 cookie,
struct b43_pio_txpacket **pack)
{
struct b43_pio *pio = &dev->pio;
struct b43_pio_txqueue *q = NULL;
unsigned int pack_index;
switch (cookie & 0xF000) {
case 0x1000:
q = pio->tx_queue_AC_BK;
break;
case 0x2000:
q = pio->tx_queue_AC_BE;
break;
case 0x3000:
q = pio->tx_queue_AC_VI;
break;
case 0x4000:
q = pio->tx_queue_AC_VO;
break;
case 0x5000:
q = pio->tx_queue_mcast;
break;
}
if (B43_WARN_ON(!q))
return NULL;
pack_index = (cookie & 0x0FFF);
if (B43_WARN_ON(pack_index >= ARRAY_SIZE(q->packets)))
return NULL;
*pack = &q->packets[pack_index];
return q;
}
static u16 index_to_pioqueue_base(struct b43_wldev *dev,
unsigned int index)
{
static const u16 bases[] = {
B43_MMIO_PIO_BASE0,
B43_MMIO_PIO_BASE1,
B43_MMIO_PIO_BASE2,
B43_MMIO_PIO_BASE3,
B43_MMIO_PIO_BASE4,
B43_MMIO_PIO_BASE5,
B43_MMIO_PIO_BASE6,
B43_MMIO_PIO_BASE7,
};
static const u16 bases_rev11[] = {
B43_MMIO_PIO11_BASE0,
B43_MMIO_PIO11_BASE1,
B43_MMIO_PIO11_BASE2,
B43_MMIO_PIO11_BASE3,
B43_MMIO_PIO11_BASE4,
B43_MMIO_PIO11_BASE5,
};
if (dev->dev->id.revision >= 11) {
B43_WARN_ON(index >= ARRAY_SIZE(bases_rev11));
return bases_rev11[index];
}
B43_WARN_ON(index >= ARRAY_SIZE(bases));
return bases[index];
}
static u16 pio_txqueue_offset(struct b43_wldev *dev)
{
if (dev->dev->id.revision >= 11)
return 0x18;
return 0;
}
static u16 pio_rxqueue_offset(struct b43_wldev *dev)
{
if (dev->dev->id.revision >= 11)
return 0x38;
return 8;
}
static struct b43_pio_txqueue *b43_setup_pioqueue_tx(struct b43_wldev *dev,
unsigned int index)
{
struct b43_pio_txqueue *q;
struct b43_pio_txpacket *p;
unsigned int i;
q = kzalloc(sizeof(*q), GFP_KERNEL);
if (!q)
return NULL;
q->dev = dev;
q->rev = dev->dev->id.revision;
q->mmio_base = index_to_pioqueue_base(dev, index) +
pio_txqueue_offset(dev);
q->index = index;
q->free_packet_slots = B43_PIO_MAX_NR_TXPACKETS;
if (q->rev >= 8) {
q->buffer_size = 1920; //FIXME this constant is wrong.
} else {
q->buffer_size = b43_piotx_read16(q, B43_PIO_TXQBUFSIZE);
q->buffer_size -= 80;
}
INIT_LIST_HEAD(&q->packets_list);
for (i = 0; i < ARRAY_SIZE(q->packets); i++) {
p = &(q->packets[i]);
INIT_LIST_HEAD(&p->list);
p->index = i;
p->queue = q;
list_add(&p->list, &q->packets_list);
}
return q;
}
static struct b43_pio_rxqueue *b43_setup_pioqueue_rx(struct b43_wldev *dev,
unsigned int index)
{
struct b43_pio_rxqueue *q;
q = kzalloc(sizeof(*q), GFP_KERNEL);
if (!q)
return NULL;
q->dev = dev;
q->rev = dev->dev->id.revision;
q->mmio_base = index_to_pioqueue_base(dev, index) +
pio_rxqueue_offset(dev);
/* Enable Direct FIFO RX (PIO) on the engine. */
b43_dma_direct_fifo_rx(dev, index, 1);
return q;
}
static void b43_pio_cancel_tx_packets(struct b43_pio_txqueue *q)
{
struct b43_pio_txpacket *pack;
unsigned int i;
for (i = 0; i < ARRAY_SIZE(q->packets); i++) {
pack = &(q->packets[i]);
if (pack->skb) {
dev_kfree_skb_any(pack->skb);
pack->skb = NULL;
}
}
}
static void b43_destroy_pioqueue_tx(struct b43_pio_txqueue *q,
const char *name)
{
if (!q)
return;
b43_pio_cancel_tx_packets(q);
kfree(q);
}
static void b43_destroy_pioqueue_rx(struct b43_pio_rxqueue *q,
const char *name)
{
if (!q)
return;
kfree(q);
}
#define destroy_queue_tx(pio, queue) do { \
b43_destroy_pioqueue_tx((pio)->queue, __stringify(queue)); \
(pio)->queue = NULL; \
} while (0)
#define destroy_queue_rx(pio, queue) do { \
b43_destroy_pioqueue_rx((pio)->queue, __stringify(queue)); \
(pio)->queue = NULL; \
} while (0)
void b43_pio_free(struct b43_wldev *dev)
{
struct b43_pio *pio;
if (!b43_using_pio_transfers(dev))
return;
pio = &dev->pio;
destroy_queue_rx(pio, rx_queue);
destroy_queue_tx(pio, tx_queue_mcast);
destroy_queue_tx(pio, tx_queue_AC_VO);
destroy_queue_tx(pio, tx_queue_AC_VI);
destroy_queue_tx(pio, tx_queue_AC_BE);
destroy_queue_tx(pio, tx_queue_AC_BK);
}
int b43_pio_init(struct b43_wldev *dev)
{
struct b43_pio *pio = &dev->pio;
int err = -ENOMEM;
b43_write32(dev, B43_MMIO_MACCTL, b43_read32(dev, B43_MMIO_MACCTL)
& ~B43_MACCTL_BE);
b43_shm_write16(dev, B43_SHM_SHARED, B43_SHM_SH_RXPADOFF, 0);
pio->tx_queue_AC_BK = b43_setup_pioqueue_tx(dev, 0);
if (!pio->tx_queue_AC_BK)
goto out;
pio->tx_queue_AC_BE = b43_setup_pioqueue_tx(dev, 1);
if (!pio->tx_queue_AC_BE)
goto err_destroy_bk;
pio->tx_queue_AC_VI = b43_setup_pioqueue_tx(dev, 2);
if (!pio->tx_queue_AC_VI)
goto err_destroy_be;
pio->tx_queue_AC_VO = b43_setup_pioqueue_tx(dev, 3);
if (!pio->tx_queue_AC_VO)
goto err_destroy_vi;
pio->tx_queue_mcast = b43_setup_pioqueue_tx(dev, 4);
if (!pio->tx_queue_mcast)
goto err_destroy_vo;
pio->rx_queue = b43_setup_pioqueue_rx(dev, 0);
if (!pio->rx_queue)
goto err_destroy_mcast;
b43dbg(dev->wl, "PIO initialized\n");
err = 0;
out:
return err;
err_destroy_mcast:
destroy_queue_tx(pio, tx_queue_mcast);
err_destroy_vo:
destroy_queue_tx(pio, tx_queue_AC_VO);
err_destroy_vi:
destroy_queue_tx(pio, tx_queue_AC_VI);
err_destroy_be:
destroy_queue_tx(pio, tx_queue_AC_BE);
err_destroy_bk:
destroy_queue_tx(pio, tx_queue_AC_BK);
return err;
}
/* Static mapping of mac80211's queues (priorities) to b43 PIO queues. */
static struct b43_pio_txqueue *select_queue_by_priority(struct b43_wldev *dev,
u8 queue_prio)
{
struct b43_pio_txqueue *q;
if (dev->qos_enabled) {
/* 0 = highest priority */
switch (queue_prio) {
default:
B43_WARN_ON(1);
/* fallthrough */
case 0:
q = dev->pio.tx_queue_AC_VO;
break;
case 1:
q = dev->pio.tx_queue_AC_VI;
break;
case 2:
q = dev->pio.tx_queue_AC_BE;
break;
case 3:
q = dev->pio.tx_queue_AC_BK;
break;
}
} else
q = dev->pio.tx_queue_AC_BE;
return q;
}
static u16 tx_write_2byte_queue(struct b43_pio_txqueue *q,
u16 ctl,
const void *_data,
unsigned int data_len)
{
struct b43_wldev *dev = q->dev;
struct b43_wl *wl = dev->wl;
const u8 *data = _data;
ctl |= B43_PIO_TXCTL_WRITELO | B43_PIO_TXCTL_WRITEHI;
b43_piotx_write16(q, B43_PIO_TXCTL, ctl);
ssb_block_write(dev->dev, data, (data_len & ~1),
q->mmio_base + B43_PIO_TXDATA,
sizeof(u16));
if (data_len & 1) {
u8 *tail = wl->pio_tailspace;
BUILD_BUG_ON(sizeof(wl->pio_tailspace) < 2);
/* Write the last byte. */
ctl &= ~B43_PIO_TXCTL_WRITEHI;
b43_piotx_write16(q, B43_PIO_TXCTL, ctl);
tail[0] = data[data_len - 1];
tail[1] = 0;
ssb_block_write(dev->dev, tail, 2,
q->mmio_base + B43_PIO_TXDATA,
sizeof(u16));
}
return ctl;
}
static void pio_tx_frame_2byte_queue(struct b43_pio_txpacket *pack,
const u8 *hdr, unsigned int hdrlen)
{
struct b43_pio_txqueue *q = pack->queue;
const char *frame = pack->skb->data;
unsigned int frame_len = pack->skb->len;
u16 ctl;
ctl = b43_piotx_read16(q, B43_PIO_TXCTL);
ctl |= B43_PIO_TXCTL_FREADY;
ctl &= ~B43_PIO_TXCTL_EOF;
/* Transfer the header data. */
ctl = tx_write_2byte_queue(q, ctl, hdr, hdrlen);
/* Transfer the frame data. */
ctl = tx_write_2byte_queue(q, ctl, frame, frame_len);
ctl |= B43_PIO_TXCTL_EOF;
b43_piotx_write16(q, B43_PIO_TXCTL, ctl);
}
static u32 tx_write_4byte_queue(struct b43_pio_txqueue *q,
u32 ctl,
const void *_data,
unsigned int data_len)
{
struct b43_wldev *dev = q->dev;
struct b43_wl *wl = dev->wl;
const u8 *data = _data;
ctl |= B43_PIO8_TXCTL_0_7 | B43_PIO8_TXCTL_8_15 |
B43_PIO8_TXCTL_16_23 | B43_PIO8_TXCTL_24_31;
b43_piotx_write32(q, B43_PIO8_TXCTL, ctl);
ssb_block_write(dev->dev, data, (data_len & ~3),
q->mmio_base + B43_PIO8_TXDATA,
sizeof(u32));
if (data_len & 3) {
u8 *tail = wl->pio_tailspace;
BUILD_BUG_ON(sizeof(wl->pio_tailspace) < 4);
memset(tail, 0, 4);
/* Write the last few bytes. */
ctl &= ~(B43_PIO8_TXCTL_8_15 | B43_PIO8_TXCTL_16_23 |
B43_PIO8_TXCTL_24_31);
switch (data_len & 3) {
case 3:
ctl |= B43_PIO8_TXCTL_16_23 | B43_PIO8_TXCTL_8_15;
tail[0] = data[data_len - 3];
tail[1] = data[data_len - 2];
tail[2] = data[data_len - 1];
break;
case 2:
ctl |= B43_PIO8_TXCTL_8_15;
tail[0] = data[data_len - 2];
tail[1] = data[data_len - 1];
break;
case 1:
tail[0] = data[data_len - 1];
break;
}
b43_piotx_write32(q, B43_PIO8_TXCTL, ctl);
ssb_block_write(dev->dev, tail, 4,
q->mmio_base + B43_PIO8_TXDATA,
sizeof(u32));
}
return ctl;
}
static void pio_tx_frame_4byte_queue(struct b43_pio_txpacket *pack,
const u8 *hdr, unsigned int hdrlen)
{
struct b43_pio_txqueue *q = pack->queue;
const char *frame = pack->skb->data;
unsigned int frame_len = pack->skb->len;
u32 ctl;
ctl = b43_piotx_read32(q, B43_PIO8_TXCTL);
ctl |= B43_PIO8_TXCTL_FREADY;
ctl &= ~B43_PIO8_TXCTL_EOF;
/* Transfer the header data. */
ctl = tx_write_4byte_queue(q, ctl, hdr, hdrlen);
/* Transfer the frame data. */
ctl = tx_write_4byte_queue(q, ctl, frame, frame_len);
ctl |= B43_PIO8_TXCTL_EOF;
b43_piotx_write32(q, B43_PIO_TXCTL, ctl);
}
static int pio_tx_frame(struct b43_pio_txqueue *q,
struct sk_buff *skb)
{
struct b43_wldev *dev = q->dev;
struct b43_wl *wl = dev->wl;
struct b43_pio_txpacket *pack;
u16 cookie;
int err;
unsigned int hdrlen;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
struct b43_txhdr *txhdr = (struct b43_txhdr *)wl->pio_scratchspace;
B43_WARN_ON(list_empty(&q->packets_list));
pack = list_entry(q->packets_list.next,
struct b43_pio_txpacket, list);
cookie = generate_cookie(q, pack);
hdrlen = b43_txhdr_size(dev);
BUILD_BUG_ON(sizeof(wl->pio_scratchspace) < sizeof(struct b43_txhdr));
B43_WARN_ON(sizeof(wl->pio_scratchspace) < hdrlen);
err = b43_generate_txhdr(dev, (u8 *)txhdr, skb,
info, cookie);
if (err)
return err;
if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) {
/* Tell the firmware about the cookie of the last
* mcast frame, so it can clear the more-data bit in it. */
b43_shm_write16(dev, B43_SHM_SHARED,
B43_SHM_SH_MCASTCOOKIE, cookie);
}
pack->skb = skb;
if (q->rev >= 8)
pio_tx_frame_4byte_queue(pack, (const u8 *)txhdr, hdrlen);
else
pio_tx_frame_2byte_queue(pack, (const u8 *)txhdr, hdrlen);
/* Remove it from the list of available packet slots.
* It will be put back when we receive the status report. */
list_del(&pack->list);
/* Update the queue statistics. */
q->buffer_used += roundup(skb->len + hdrlen, 4);
q->free_packet_slots -= 1;
return 0;
}
int b43_pio_tx(struct b43_wldev *dev, struct sk_buff *skb)
{
struct b43_pio_txqueue *q;
struct ieee80211_hdr *hdr;
unsigned int hdrlen, total_len;
int err = 0;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
hdr = (struct ieee80211_hdr *)skb->data;
if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) {
/* The multicast queue will be sent after the DTIM. */
q = dev->pio.tx_queue_mcast;
/* Set the frame More-Data bit. Ucode will clear it
* for us on the last frame. */
hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_MOREDATA);
} else {
/* Decide by priority where to put this frame. */
q = select_queue_by_priority(dev, skb_get_queue_mapping(skb));
}
hdrlen = b43_txhdr_size(dev);
total_len = roundup(skb->len + hdrlen, 4);
if (unlikely(total_len > q->buffer_size)) {
err = -ENOBUFS;
b43dbg(dev->wl, "PIO: TX packet longer than queue.\n");
goto out;
}
if (unlikely(q->free_packet_slots == 0)) {
err = -ENOBUFS;
b43warn(dev->wl, "PIO: TX packet overflow.\n");
goto out;
}
B43_WARN_ON(q->buffer_used > q->buffer_size);
if (total_len > (q->buffer_size - q->buffer_used)) {
/* Not enough memory on the queue. */
err = -EBUSY;
ieee80211_stop_queue(dev->wl->hw, skb_get_queue_mapping(skb));
q->stopped = 1;
goto out;
}
/* Assign the queue number to the ring (if not already done before)
* so TX status handling can use it. The mac80211-queue to b43-queue
* mapping is static, so we don't need to store it per frame. */
q->queue_prio = skb_get_queue_mapping(skb);
err = pio_tx_frame(q, skb);
if (unlikely(err == -ENOKEY)) {
/* Drop this packet, as we don't have the encryption key
* anymore and must not transmit it unencrypted. */
dev_kfree_skb_any(skb);
err = 0;
goto out;
}
if (unlikely(err)) {
b43err(dev->wl, "PIO transmission failure\n");
goto out;
}
B43_WARN_ON(q->buffer_used > q->buffer_size);
if (((q->buffer_size - q->buffer_used) < roundup(2 + 2 + 6, 4)) ||
(q->free_packet_slots == 0)) {
/* The queue is full. */
ieee80211_stop_queue(dev->wl->hw, skb_get_queue_mapping(skb));
q->stopped = 1;
}
out:
return err;
}
void b43_pio_handle_txstatus(struct b43_wldev *dev,
const struct b43_txstatus *status)
{
struct b43_pio_txqueue *q;
struct b43_pio_txpacket *pack = NULL;
unsigned int total_len;
struct ieee80211_tx_info *info;
q = parse_cookie(dev, status->cookie, &pack);
if (unlikely(!q))
return;
B43_WARN_ON(!pack);
info = IEEE80211_SKB_CB(pack->skb);
b43_fill_txstatus_report(dev, info, status);
total_len = pack->skb->len + b43_txhdr_size(dev);
total_len = roundup(total_len, 4);
q->buffer_used -= total_len;
q->free_packet_slots += 1;
ieee80211_tx_status(dev->wl->hw, pack->skb);
pack->skb = NULL;
list_add(&pack->list, &q->packets_list);
if (q->stopped) {
ieee80211_wake_queue(dev->wl->hw, q->queue_prio);
q->stopped = 0;
}
}
/* Returns whether we should fetch another frame. */
static bool pio_rx_frame(struct b43_pio_rxqueue *q)
{
struct b43_wldev *dev = q->dev;
struct b43_wl *wl = dev->wl;
u16 len;
u32 macstat;
unsigned int i, padding;
struct sk_buff *skb;
const char *err_msg = NULL;
struct b43_rxhdr_fw4 *rxhdr =
(struct b43_rxhdr_fw4 *)wl->pio_scratchspace;
BUILD_BUG_ON(sizeof(wl->pio_scratchspace) < sizeof(*rxhdr));
memset(rxhdr, 0, sizeof(*rxhdr));
/* Check if we have data and wait for it to get ready. */
if (q->rev >= 8) {
u32 ctl;
ctl = b43_piorx_read32(q, B43_PIO8_RXCTL);
if (!(ctl & B43_PIO8_RXCTL_FRAMERDY))
return 0;
b43_piorx_write32(q, B43_PIO8_RXCTL,
B43_PIO8_RXCTL_FRAMERDY);
for (i = 0; i < 10; i++) {
ctl = b43_piorx_read32(q, B43_PIO8_RXCTL);
if (ctl & B43_PIO8_RXCTL_DATARDY)
goto data_ready;
udelay(10);
}
} else {
u16 ctl;
ctl = b43_piorx_read16(q, B43_PIO_RXCTL);
if (!(ctl & B43_PIO_RXCTL_FRAMERDY))
return 0;
b43_piorx_write16(q, B43_PIO_RXCTL,
B43_PIO_RXCTL_FRAMERDY);
for (i = 0; i < 10; i++) {
ctl = b43_piorx_read16(q, B43_PIO_RXCTL);
if (ctl & B43_PIO_RXCTL_DATARDY)
goto data_ready;
udelay(10);
}
}
b43dbg(q->dev->wl, "PIO RX timed out\n");
return 1;
data_ready:
/* Get the preamble (RX header) */
if (q->rev >= 8) {
ssb_block_read(dev->dev, rxhdr, sizeof(*rxhdr),
q->mmio_base + B43_PIO8_RXDATA,
sizeof(u32));
} else {
ssb_block_read(dev->dev, rxhdr, sizeof(*rxhdr),
q->mmio_base + B43_PIO_RXDATA,
sizeof(u16));
}
/* Sanity checks. */
len = le16_to_cpu(rxhdr->frame_len);
if (unlikely(len > 0x700)) {
err_msg = "len > 0x700";
goto rx_error;
}
if (unlikely(len == 0)) {
err_msg = "len == 0";
goto rx_error;
}
macstat = le32_to_cpu(rxhdr->mac_status);
if (macstat & B43_RX_MAC_FCSERR) {
if (!(q->dev->wl->filter_flags & FIF_FCSFAIL)) {
/* Drop frames with failed FCS. */
err_msg = "Frame FCS error";
goto rx_error;
}
}
/* We always pad 2 bytes, as that's what upstream code expects
* due to the RX-header being 30 bytes. In case the frame is
* unaligned, we pad another 2 bytes. */
padding = (macstat & B43_RX_MAC_PADDING) ? 2 : 0;
skb = dev_alloc_skb(len + padding + 2);
if (unlikely(!skb)) {
err_msg = "Out of memory";
goto rx_error;
}
skb_reserve(skb, 2);
skb_put(skb, len + padding);
if (q->rev >= 8) {
ssb_block_read(dev->dev, skb->data + padding, (len & ~3),
q->mmio_base + B43_PIO8_RXDATA,
sizeof(u32));
if (len & 3) {
u8 *tail = wl->pio_tailspace;
BUILD_BUG_ON(sizeof(wl->pio_tailspace) < 4);
/* Read the last few bytes. */
ssb_block_read(dev->dev, tail, 4,
q->mmio_base + B43_PIO8_RXDATA,
sizeof(u32));
switch (len & 3) {
case 3:
skb->data[len + padding - 3] = tail[0];
skb->data[len + padding - 2] = tail[1];
skb->data[len + padding - 1] = tail[2];
break;
case 2:
skb->data[len + padding - 2] = tail[0];
skb->data[len + padding - 1] = tail[1];
break;
case 1:
skb->data[len + padding - 1] = tail[0];
break;
}
}
} else {
ssb_block_read(dev->dev, skb->data + padding, (len & ~1),
q->mmio_base + B43_PIO_RXDATA,
sizeof(u16));
if (len & 1) {
u8 *tail = wl->pio_tailspace;
BUILD_BUG_ON(sizeof(wl->pio_tailspace) < 2);
/* Read the last byte. */
ssb_block_read(dev->dev, tail, 2,
q->mmio_base + B43_PIO_RXDATA,
sizeof(u16));
skb->data[len + padding - 1] = tail[0];
}
}
b43_rx(q->dev, skb, rxhdr);
return 1;
rx_error:
if (err_msg)
b43dbg(q->dev->wl, "PIO RX error: %s\n", err_msg);
if (q->rev >= 8)
b43_piorx_write32(q, B43_PIO8_RXCTL, B43_PIO8_RXCTL_DATARDY);
else
b43_piorx_write16(q, B43_PIO_RXCTL, B43_PIO_RXCTL_DATARDY);
return 1;
}
void b43_pio_rx(struct b43_pio_rxqueue *q)
{
unsigned int count = 0;
bool stop;
while (1) {
stop = (pio_rx_frame(q) == 0);
if (stop)
break;
cond_resched();
if (WARN_ON_ONCE(++count > 10000))
break;
}
}
static void b43_pio_tx_suspend_queue(struct b43_pio_txqueue *q)
{
if (q->rev >= 8) {
b43_piotx_write32(q, B43_PIO8_TXCTL,
b43_piotx_read32(q, B43_PIO8_TXCTL)
| B43_PIO8_TXCTL_SUSPREQ);
} else {
b43_piotx_write16(q, B43_PIO_TXCTL,
b43_piotx_read16(q, B43_PIO_TXCTL)
| B43_PIO_TXCTL_SUSPREQ);
}
}
static void b43_pio_tx_resume_queue(struct b43_pio_txqueue *q)
{
if (q->rev >= 8) {
b43_piotx_write32(q, B43_PIO8_TXCTL,
b43_piotx_read32(q, B43_PIO8_TXCTL)
& ~B43_PIO8_TXCTL_SUSPREQ);
} else {
b43_piotx_write16(q, B43_PIO_TXCTL,
b43_piotx_read16(q, B43_PIO_TXCTL)
& ~B43_PIO_TXCTL_SUSPREQ);
}
}
void b43_pio_tx_suspend(struct b43_wldev *dev)
{
b43_power_saving_ctl_bits(dev, B43_PS_AWAKE);
b43_pio_tx_suspend_queue(dev->pio.tx_queue_AC_BK);
b43_pio_tx_suspend_queue(dev->pio.tx_queue_AC_BE);
b43_pio_tx_suspend_queue(dev->pio.tx_queue_AC_VI);
b43_pio_tx_suspend_queue(dev->pio.tx_queue_AC_VO);
b43_pio_tx_suspend_queue(dev->pio.tx_queue_mcast);
}
void b43_pio_tx_resume(struct b43_wldev *dev)
{
b43_pio_tx_resume_queue(dev->pio.tx_queue_mcast);
b43_pio_tx_resume_queue(dev->pio.tx_queue_AC_VO);
b43_pio_tx_resume_queue(dev->pio.tx_queue_AC_VI);
b43_pio_tx_resume_queue(dev->pio.tx_queue_AC_BE);
b43_pio_tx_resume_queue(dev->pio.tx_queue_AC_BK);
b43_power_saving_ctl_bits(dev, 0);
}
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