aboutsummaryrefslogtreecommitdiff
path: root/drivers/net/wireless/b43/pio.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/net/wireless/b43/pio.c')
-rw-r--r--drivers/net/wireless/b43/pio.c265
1 files changed, 129 insertions, 136 deletions
diff --git a/drivers/net/wireless/b43/pio.c b/drivers/net/wireless/b43/pio.c
index 8cd9776752e..a4ff5e2a42b 100644
--- a/drivers/net/wireless/b43/pio.c
+++ b/drivers/net/wireless/b43/pio.c
@@ -4,7 +4,7 @@
PIO data transfer
- Copyright (c) 2005-2008 Michael Buesch <mb@bu3sch.de>
+ Copyright (c) 2005-2008 Michael Buesch <m@bues.ch>
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
@@ -30,9 +30,8 @@
#include "xmit.h"
#include <linux/delay.h>
-
-
-static void b43_pio_rx_work(struct work_struct *work);
+#include <linux/sched.h>
+#include <linux/slab.h>
static u16 generate_cookie(struct b43_pio_txqueue *q,
@@ -112,7 +111,7 @@ static u16 index_to_pioqueue_base(struct b43_wldev *dev,
B43_MMIO_PIO11_BASE5,
};
- if (dev->dev->id.revision >= 11) {
+ if (dev->dev->core_rev >= 11) {
B43_WARN_ON(index >= ARRAY_SIZE(bases_rev11));
return bases_rev11[index];
}
@@ -122,14 +121,14 @@ static u16 index_to_pioqueue_base(struct b43_wldev *dev,
static u16 pio_txqueue_offset(struct b43_wldev *dev)
{
- if (dev->dev->id.revision >= 11)
+ if (dev->dev->core_rev >= 11)
return 0x18;
return 0;
}
static u16 pio_rxqueue_offset(struct b43_wldev *dev)
{
- if (dev->dev->id.revision >= 11)
+ if (dev->dev->core_rev >= 11)
return 0x38;
return 8;
}
@@ -144,9 +143,8 @@ static struct b43_pio_txqueue *b43_setup_pioqueue_tx(struct b43_wldev *dev,
q = kzalloc(sizeof(*q), GFP_KERNEL);
if (!q)
return NULL;
- spin_lock_init(&q->lock);
q->dev = dev;
- q->rev = dev->dev->id.revision;
+ q->rev = dev->dev->core_rev;
q->mmio_base = index_to_pioqueue_base(dev, index) +
pio_txqueue_offset(dev);
q->index = index;
@@ -179,12 +177,10 @@ static struct b43_pio_rxqueue *b43_setup_pioqueue_rx(struct b43_wldev *dev,
q = kzalloc(sizeof(*q), GFP_KERNEL);
if (!q)
return NULL;
- spin_lock_init(&q->lock);
q->dev = dev;
- q->rev = dev->dev->id.revision;
+ q->rev = dev->dev->core_rev;
q->mmio_base = index_to_pioqueue_base(dev, index) +
pio_rxqueue_offset(dev);
- INIT_WORK(&q->rx_work, b43_pio_rx_work);
/* Enable Direct FIFO RX (PIO) on the engine. */
b43_dma_direct_fifo_rx(dev, index, 1);
@@ -200,7 +196,7 @@ static void b43_pio_cancel_tx_packets(struct b43_pio_txqueue *q)
for (i = 0; i < ARRAY_SIZE(q->packets); i++) {
pack = &(q->packets[i]);
if (pack->skb) {
- dev_kfree_skb_any(pack->skb);
+ ieee80211_free_txskb(q->dev->wl->hw, pack->skb);
pack->skb = NULL;
}
}
@@ -249,13 +245,6 @@ void b43_pio_free(struct b43_wldev *dev)
destroy_queue_tx(pio, tx_queue_AC_BK);
}
-void b43_pio_stop(struct b43_wldev *dev)
-{
- if (!b43_using_pio_transfers(dev))
- return;
- cancel_work_sync(&dev->pio.rx_queue->rx_work);
-}
-
int b43_pio_init(struct b43_wldev *dev)
{
struct b43_pio *pio = &dev->pio;
@@ -313,7 +302,7 @@ static struct b43_pio_txqueue *select_queue_by_priority(struct b43_wldev *dev,
{
struct b43_pio_txqueue *q;
- if (b43_modparam_qos) {
+ if (dev->qos_enabled) {
/* 0 = highest priority */
switch (queue_prio) {
default:
@@ -344,19 +333,27 @@ static u16 tx_write_2byte_queue(struct b43_pio_txqueue *q,
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),
+ b43_block_write(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);
- b43_piotx_write16(q, B43_PIO_TXDATA, data[data_len - 1]);
+ tail[0] = data[data_len - 1];
+ tail[1] = 0;
+ b43_block_write(dev, tail, 2,
+ q->mmio_base + B43_PIO_TXDATA,
+ sizeof(u16));
}
return ctl;
@@ -389,36 +386,44 @@ static u32 tx_write_4byte_queue(struct b43_pio_txqueue *q,
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),
+ b43_block_write(dev, data, (data_len & ~3),
q->mmio_base + B43_PIO8_TXDATA,
sizeof(u32));
if (data_len & 3) {
- u32 value = 0;
+ 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);
- data = &(data[data_len - 1]);
switch (data_len & 3) {
case 3:
- ctl |= B43_PIO8_TXCTL_16_23;
- value |= (u32)(*data) << 16;
- data--;
+ 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;
- value |= (u32)(*data) << 8;
- data--;
+ tail[0] = data[data_len - 2];
+ tail[1] = data[data_len - 1];
+ break;
case 1:
- value |= (u32)(*data);
+ tail[0] = data[data_len - 1];
+ break;
}
b43_piotx_write32(q, B43_PIO8_TXCTL, ctl);
- b43_piotx_write32(q, B43_PIO8_TXDATA, value);
+ b43_block_write(dev, tail, 4,
+ q->mmio_base + B43_PIO8_TXDATA,
+ sizeof(u32));
}
return ctl;
@@ -448,36 +453,40 @@ static void pio_tx_frame_4byte_queue(struct b43_pio_txpacket *pack,
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;
- struct b43_txhdr txhdr;
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(q->dev);
- err = b43_generate_txhdr(q->dev, (u8 *)&txhdr, skb->data,
- skb->len, info, cookie);
+ 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(q->dev, B43_SHM_SHARED,
+ 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);
+ pio_tx_frame_4byte_queue(pack, (const u8 *)txhdr, hdrlen);
else
- pio_tx_frame_2byte_queue(pack, (const u8 *)&txhdr, hdrlen);
+ 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. */
@@ -494,7 +503,6 @@ int b43_pio_tx(struct b43_wldev *dev, struct sk_buff *skb)
{
struct b43_pio_txqueue *q;
struct ieee80211_hdr *hdr;
- unsigned long flags;
unsigned int hdrlen, total_len;
int err = 0;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
@@ -512,20 +520,18 @@ int b43_pio_tx(struct b43_wldev *dev, struct sk_buff *skb)
q = select_queue_by_priority(dev, skb_get_queue_mapping(skb));
}
- spin_lock_irqsave(&q->lock, flags);
-
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_unlock;
+ goto out;
}
if (unlikely(q->free_packet_slots == 0)) {
err = -ENOBUFS;
b43warn(dev->wl, "PIO: TX packet overflow.\n");
- goto out_unlock;
+ goto out;
}
B43_WARN_ON(q->buffer_used > q->buffer_size);
@@ -533,8 +539,8 @@ int b43_pio_tx(struct b43_wldev *dev, struct sk_buff *skb)
/* Not enough memory on the queue. */
err = -EBUSY;
ieee80211_stop_queue(dev->wl->hw, skb_get_queue_mapping(skb));
- q->stopped = 1;
- goto out_unlock;
+ q->stopped = true;
+ goto out;
}
/* Assign the queue number to the ring (if not already done before)
@@ -546,31 +552,27 @@ int b43_pio_tx(struct b43_wldev *dev, struct sk_buff *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);
+ ieee80211_free_txskb(dev->wl->hw, skb);
err = 0;
- goto out_unlock;
+ goto out;
}
if (unlikely(err)) {
b43err(dev->wl, "PIO transmission failure\n");
- goto out_unlock;
+ goto out;
}
- q->nr_tx_packets++;
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;
+ q->stopped = true;
}
-out_unlock:
- spin_unlock_irqrestore(&q->lock, flags);
-
+out:
return err;
}
-/* Called with IRQs disabled. */
void b43_pio_handle_txstatus(struct b43_wldev *dev,
const struct b43_txstatus *status)
{
@@ -584,8 +586,6 @@ void b43_pio_handle_txstatus(struct b43_wldev *dev,
return;
B43_WARN_ON(!pack);
- spin_lock(&q->lock); /* IRQs are already disabled. */
-
info = IEEE80211_SKB_CB(pack->skb);
b43_fill_txstatus_report(dev, info, status);
@@ -595,34 +595,13 @@ void b43_pio_handle_txstatus(struct b43_wldev *dev,
q->buffer_used -= total_len;
q->free_packet_slots += 1;
- ieee80211_tx_status_irqsafe(dev->wl->hw, pack->skb);
+ 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;
- }
-
- spin_unlock(&q->lock);
-}
-
-void b43_pio_get_tx_stats(struct b43_wldev *dev,
- struct ieee80211_tx_queue_stats *stats)
-{
- const int nr_queues = dev->wl->hw->queues;
- struct b43_pio_txqueue *q;
- unsigned long flags;
- int i;
-
- for (i = 0; i < nr_queues; i++) {
- q = select_queue_by_priority(dev, i);
-
- spin_lock_irqsave(&q->lock, flags);
- stats[i].len = B43_PIO_MAX_NR_TXPACKETS - q->free_packet_slots;
- stats[i].limit = B43_PIO_MAX_NR_TXPACKETS;
- stats[i].count = q->nr_tx_packets;
- spin_unlock_irqrestore(&q->lock, flags);
+ q->stopped = false;
}
}
@@ -630,14 +609,27 @@ void b43_pio_get_tx_stats(struct b43_wldev *dev,
static bool pio_rx_frame(struct b43_pio_rxqueue *q)
{
struct b43_wldev *dev = q->dev;
- struct b43_rxhdr_fw4 rxhdr;
+ struct b43_wl *wl = dev->wl;
u16 len;
- u32 macstat;
+ u32 macstat = 0;
unsigned int i, padding;
struct sk_buff *skb;
const char *err_msg = NULL;
-
- memset(&rxhdr, 0, sizeof(rxhdr));
+ struct b43_rxhdr_fw4 *rxhdr =
+ (struct b43_rxhdr_fw4 *)wl->pio_scratchspace;
+ size_t rxhdr_size = sizeof(*rxhdr);
+
+ BUILD_BUG_ON(sizeof(wl->pio_scratchspace) < sizeof(*rxhdr));
+ switch (dev->fw.hdr_format) {
+ case B43_FW_HDR_410:
+ case B43_FW_HDR_351:
+ rxhdr_size -= sizeof(rxhdr->format_598) -
+ sizeof(rxhdr->format_351);
+ break;
+ case B43_FW_HDR_598:
+ break;
+ }
+ memset(rxhdr, 0, rxhdr_size);
/* Check if we have data and wait for it to get ready. */
if (q->rev >= 8) {
@@ -645,7 +637,7 @@ static bool pio_rx_frame(struct b43_pio_rxqueue *q)
ctl = b43_piorx_read32(q, B43_PIO8_RXCTL);
if (!(ctl & B43_PIO8_RXCTL_FRAMERDY))
- return 0;
+ return false;
b43_piorx_write32(q, B43_PIO8_RXCTL,
B43_PIO8_RXCTL_FRAMERDY);
for (i = 0; i < 10; i++) {
@@ -659,7 +651,7 @@ static bool pio_rx_frame(struct b43_pio_rxqueue *q)
ctl = b43_piorx_read16(q, B43_PIO_RXCTL);
if (!(ctl & B43_PIO_RXCTL_FRAMERDY))
- return 0;
+ return false;
b43_piorx_write16(q, B43_PIO_RXCTL,
B43_PIO_RXCTL_FRAMERDY);
for (i = 0; i < 10; i++) {
@@ -670,21 +662,21 @@ static bool pio_rx_frame(struct b43_pio_rxqueue *q)
}
}
b43dbg(q->dev->wl, "PIO RX timed out\n");
- return 1;
+ return true;
data_ready:
/* Get the preamble (RX header) */
if (q->rev >= 8) {
- ssb_block_read(dev->dev, &rxhdr, sizeof(rxhdr),
+ b43_block_read(dev, rxhdr, rxhdr_size,
q->mmio_base + B43_PIO8_RXDATA,
sizeof(u32));
} else {
- ssb_block_read(dev->dev, &rxhdr, sizeof(rxhdr),
+ b43_block_read(dev, rxhdr, rxhdr_size,
q->mmio_base + B43_PIO_RXDATA,
sizeof(u16));
}
/* Sanity checks. */
- len = le16_to_cpu(rxhdr.frame_len);
+ len = le16_to_cpu(rxhdr->frame_len);
if (unlikely(len > 0x700)) {
err_msg = "len > 0x700";
goto rx_error;
@@ -694,7 +686,15 @@ data_ready:
goto rx_error;
}
- macstat = le32_to_cpu(rxhdr.mac_status);
+ switch (dev->fw.hdr_format) {
+ case B43_FW_HDR_598:
+ macstat = le32_to_cpu(rxhdr->format_598.mac_status);
+ break;
+ case B43_FW_HDR_410:
+ case B43_FW_HDR_351:
+ macstat = le32_to_cpu(rxhdr->format_351.mac_status);
+ break;
+ }
if (macstat & B43_RX_MAC_FCSERR) {
if (!(q->dev->wl->filter_flags & FIF_FCSFAIL)) {
/* Drop frames with failed FCS. */
@@ -715,82 +715,80 @@ data_ready:
skb_reserve(skb, 2);
skb_put(skb, len + padding);
if (q->rev >= 8) {
- ssb_block_read(dev->dev, skb->data + padding, (len & ~3),
+ b43_block_read(dev, skb->data + padding, (len & ~3),
q->mmio_base + B43_PIO8_RXDATA,
sizeof(u32));
if (len & 3) {
- u32 value;
- char *data;
+ u8 *tail = wl->pio_tailspace;
+ BUILD_BUG_ON(sizeof(wl->pio_tailspace) < 4);
/* Read the last few bytes. */
- value = b43_piorx_read32(q, B43_PIO8_RXDATA);
- data = &(skb->data[len + padding - 1]);
+ b43_block_read(dev, tail, 4,
+ q->mmio_base + B43_PIO8_RXDATA,
+ sizeof(u32));
switch (len & 3) {
case 3:
- *data = (value >> 16);
- data--;
+ skb->data[len + padding - 3] = tail[0];
+ skb->data[len + padding - 2] = tail[1];
+ skb->data[len + padding - 1] = tail[2];
+ break;
case 2:
- *data = (value >> 8);
- data--;
+ skb->data[len + padding - 2] = tail[0];
+ skb->data[len + padding - 1] = tail[1];
+ break;
case 1:
- *data = value;
+ skb->data[len + padding - 1] = tail[0];
+ break;
}
}
} else {
- ssb_block_read(dev->dev, skb->data + padding, (len & ~1),
+ b43_block_read(dev, skb->data + padding, (len & ~1),
q->mmio_base + B43_PIO_RXDATA,
sizeof(u16));
if (len & 1) {
- u16 value;
+ u8 *tail = wl->pio_tailspace;
+ BUILD_BUG_ON(sizeof(wl->pio_tailspace) < 2);
/* Read the last byte. */
- value = b43_piorx_read16(q, B43_PIO_RXDATA);
- skb->data[len + padding - 1] = value;
+ b43_block_read(dev, tail, 2,
+ q->mmio_base + B43_PIO_RXDATA,
+ sizeof(u16));
+ skb->data[len + padding - 1] = tail[0];
}
}
- b43_rx(q->dev, skb, &rxhdr);
+ b43_rx(q->dev, skb, rxhdr);
- return 1;
+ return true;
rx_error:
if (err_msg)
b43dbg(q->dev->wl, "PIO RX error: %s\n", err_msg);
- b43_piorx_write16(q, B43_PIO_RXCTL, B43_PIO_RXCTL_DATARDY);
- return 1;
+ 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 true;
}
-/* RX workqueue. We can sleep, yay! */
-static void b43_pio_rx_work(struct work_struct *work)
+void b43_pio_rx(struct b43_pio_rxqueue *q)
{
- struct b43_pio_rxqueue *q = container_of(work, struct b43_pio_rxqueue,
- rx_work);
- unsigned int budget = 50;
+ unsigned int count = 0;
bool stop;
- do {
- spin_lock_irq(&q->lock);
+ while (1) {
stop = (pio_rx_frame(q) == 0);
- spin_unlock_irq(&q->lock);
- cond_resched();
if (stop)
break;
- } while (--budget);
-}
-
-/* Called with IRQs disabled. */
-void b43_pio_rx(struct b43_pio_rxqueue *q)
-{
- /* Due to latency issues we must run the RX path in
- * a workqueue to be able to schedule between packets. */
- queue_work(q->dev->wl->hw->workqueue, &q->rx_work);
+ cond_resched();
+ if (WARN_ON_ONCE(++count > 10000))
+ break;
+ }
}
static void b43_pio_tx_suspend_queue(struct b43_pio_txqueue *q)
{
- unsigned long flags;
-
- spin_lock_irqsave(&q->lock, flags);
if (q->rev >= 8) {
b43_piotx_write32(q, B43_PIO8_TXCTL,
b43_piotx_read32(q, B43_PIO8_TXCTL)
@@ -800,14 +798,10 @@ static void b43_pio_tx_suspend_queue(struct b43_pio_txqueue *q)
b43_piotx_read16(q, B43_PIO_TXCTL)
| B43_PIO_TXCTL_SUSPREQ);
}
- spin_unlock_irqrestore(&q->lock, flags);
}
static void b43_pio_tx_resume_queue(struct b43_pio_txqueue *q)
{
- unsigned long flags;
-
- spin_lock_irqsave(&q->lock, flags);
if (q->rev >= 8) {
b43_piotx_write32(q, B43_PIO8_TXCTL,
b43_piotx_read32(q, B43_PIO8_TXCTL)
@@ -817,7 +811,6 @@ static void b43_pio_tx_resume_queue(struct b43_pio_txqueue *q)
b43_piotx_read16(q, B43_PIO_TXCTL)
& ~B43_PIO_TXCTL_SUSPREQ);
}
- spin_unlock_irqrestore(&q->lock, flags);
}
void b43_pio_tx_suspend(struct b43_wldev *dev)
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-05 20:38:14 +0000