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-rw-r--r--drivers/net/wireless/b43/Kconfig17
-rw-r--r--drivers/net/wireless/b43/Makefile1
-rw-r--r--drivers/net/wireless/b43/b43.h59
-rw-r--r--drivers/net/wireless/b43/dma.c120
-rw-r--r--drivers/net/wireless/b43/dma.h3
-rw-r--r--drivers/net/wireless/b43/main.c37
-rw-r--r--drivers/net/wireless/b43/pio.c835
-rw-r--r--drivers/net/wireless/b43/pio.h220
-rw-r--r--drivers/net/wireless/b43/xmit.c61
-rw-r--r--drivers/net/wireless/b43/xmit.h17
10 files changed, 1267 insertions, 103 deletions
diff --git a/drivers/net/wireless/b43/Kconfig b/drivers/net/wireless/b43/Kconfig
index 8bc4bc4c330..94f04559028 100644
--- a/drivers/net/wireless/b43/Kconfig
+++ b/drivers/net/wireless/b43/Kconfig
@@ -62,6 +62,13 @@ config B43_PCMCIA
If unsure, say N.
+# Data transfers to the device via PIO
+# This is only needed on PCMCIA devices. All others can do DMA properly.
+config B43_PIO
+ bool
+ depends on B43 && (B43_PCMCIA || B43_FORCE_PIO)
+ default y
+
config B43_NPHY
bool "Pre IEEE 802.11n support (BROKEN)"
depends on B43 && EXPERIMENTAL && BROKEN
@@ -94,3 +101,13 @@ config B43_DEBUG
Say Y, if you want to find out why the driver does not
work for you.
+
+config B43_FORCE_PIO
+ bool "Force usage of PIO instead of DMA"
+ depends on B43 && B43_DEBUG
+ ---help---
+ This will disable DMA and always enable PIO instead.
+
+ Say N!
+ This is only for debugging the PIO engine code. You do
+ _NOT_ want to enable this.
diff --git a/drivers/net/wireless/b43/Makefile b/drivers/net/wireless/b43/Makefile
index ae11fe4c0be..8c52b0b9862 100644
--- a/drivers/net/wireless/b43/Makefile
+++ b/drivers/net/wireless/b43/Makefile
@@ -8,6 +8,7 @@ b43-y += xmit.o
b43-y += lo.o
b43-y += wa.o
b43-y += dma.o
+b43-$(CONFIG_B43_PIO) += pio.o
b43-$(CONFIG_B43_RFKILL) += rfkill.o
b43-$(CONFIG_B43_LEDS) += leds.o
b43-$(CONFIG_B43_PCMCIA) += pcmcia.o
diff --git a/drivers/net/wireless/b43/b43.h b/drivers/net/wireless/b43/b43.h
index d40be156851..ef8ae385835 100644
--- a/drivers/net/wireless/b43/b43.h
+++ b/drivers/net/wireless/b43/b43.h
@@ -75,6 +75,23 @@
#define B43_MMIO_DMA64_BASE4 0x300
#define B43_MMIO_DMA64_BASE5 0x340
+/* PIO on core rev < 11 */
+#define B43_MMIO_PIO_BASE0 0x300
+#define B43_MMIO_PIO_BASE1 0x310
+#define B43_MMIO_PIO_BASE2 0x320
+#define B43_MMIO_PIO_BASE3 0x330
+#define B43_MMIO_PIO_BASE4 0x340
+#define B43_MMIO_PIO_BASE5 0x350
+#define B43_MMIO_PIO_BASE6 0x360
+#define B43_MMIO_PIO_BASE7 0x370
+/* PIO on core rev >= 11 */
+#define B43_MMIO_PIO11_BASE0 0x200
+#define B43_MMIO_PIO11_BASE1 0x240
+#define B43_MMIO_PIO11_BASE2 0x280
+#define B43_MMIO_PIO11_BASE3 0x2C0
+#define B43_MMIO_PIO11_BASE4 0x300
+#define B43_MMIO_PIO11_BASE5 0x340
+
#define B43_MMIO_PHY_VER 0x3E0
#define B43_MMIO_PHY_RADIO 0x3E2
#define B43_MMIO_PHY0 0x3E6
@@ -442,7 +459,6 @@ enum {
};
struct b43_dmaring;
-struct b43_pioqueue;
/* The firmware file header */
#define B43_FW_TYPE_UCODE 'u'
@@ -598,6 +614,20 @@ struct b43_dma {
struct b43_dmaring *rx_ring;
};
+struct b43_pio_txqueue;
+struct b43_pio_rxqueue;
+
+/* Data structures for PIO transmission, per 80211 core. */
+struct b43_pio {
+ struct b43_pio_txqueue *tx_queue_AC_BK; /* Background */
+ struct b43_pio_txqueue *tx_queue_AC_BE; /* Best Effort */
+ struct b43_pio_txqueue *tx_queue_AC_VI; /* Video */
+ struct b43_pio_txqueue *tx_queue_AC_VO; /* Voice */
+ struct b43_pio_txqueue *tx_queue_mcast; /* Multicast */
+
+ struct b43_pio_rxqueue *rx_queue;
+};
+
/* Context information for a noise calculation (Link Quality). */
struct b43_noise_calculation {
u8 channel_at_start;
@@ -773,8 +803,15 @@ struct b43_wldev {
/* PHY/Radio device. */
struct b43_phy phy;
- /* DMA engines. */
- struct b43_dma dma;
+ union {
+ /* DMA engines. */
+ struct b43_dma dma;
+ /* PIO engines. */
+ struct b43_pio pio;
+ };
+ /* Use b43_using_pio_transfers() to check whether we are using
+ * DMA or PIO data transfers. */
+ bool __using_pio_transfers;
/* Various statistics about the physical device. */
struct b43_stats stats;
@@ -858,6 +895,22 @@ static inline void b43_write32(struct b43_wldev *dev, u16 offset, u32 value)
ssb_write32(dev->dev, offset, value);
}
+static inline bool b43_using_pio_transfers(struct b43_wldev *dev)
+{
+#ifdef CONFIG_B43_PIO
+ return dev->__using_pio_transfers;
+#else
+ return 0;
+#endif
+}
+
+#ifdef CONFIG_B43_FORCE_PIO
+# define B43_FORCE_PIO 1
+#else
+# define B43_FORCE_PIO 0
+#endif
+
+
/* Message printing */
void b43info(struct b43_wl *wl, const char *fmt, ...)
__attribute__ ((format(printf, 2, 3)));
diff --git a/drivers/net/wireless/b43/dma.c b/drivers/net/wireless/b43/dma.c
index 70db0570adc..f1b983cb9c1 100644
--- a/drivers/net/wireless/b43/dma.c
+++ b/drivers/net/wireless/b43/dma.c
@@ -550,7 +550,6 @@ static int setup_rx_descbuffer(struct b43_dmaring *ring,
struct b43_dmadesc_meta *meta, gfp_t gfp_flags)
{
struct b43_rxhdr_fw4 *rxhdr;
- struct b43_hwtxstatus *txstat;
dma_addr_t dmaaddr;
struct sk_buff *skb;
@@ -586,8 +585,6 @@ static int setup_rx_descbuffer(struct b43_dmaring *ring,
rxhdr = (struct b43_rxhdr_fw4 *)(skb->data);
rxhdr->frame_len = 0;
- txstat = (struct b43_hwtxstatus *)(skb->data);
- txstat->cookie = 0;
return 0;
}
@@ -776,6 +773,18 @@ static u64 supported_dma_mask(struct b43_wldev *dev)
return DMA_30BIT_MASK;
}
+static enum b43_dmatype dma_mask_to_engine_type(u64 dmamask)
+{
+ if (dmamask == DMA_30BIT_MASK)
+ return B43_DMA_30BIT;
+ if (dmamask == DMA_32BIT_MASK)
+ return B43_DMA_32BIT;
+ if (dmamask == DMA_64BIT_MASK)
+ return B43_DMA_64BIT;
+ B43_WARN_ON(1);
+ return B43_DMA_30BIT;
+}
+
/* Main initialization function. */
static
struct b43_dmaring *b43_setup_dmaring(struct b43_wldev *dev,
@@ -956,7 +965,11 @@ static void b43_destroy_dmaring(struct b43_dmaring *ring,
void b43_dma_free(struct b43_wldev *dev)
{
- struct b43_dma *dma = &dev->dma;
+ struct b43_dma *dma;
+
+ if (b43_using_pio_transfers(dev))
+ return;
+ dma = &dev->dma;
destroy_ring(dma, rx_ring);
destroy_ring(dma, tx_ring_AC_BK);
@@ -974,19 +987,7 @@ int b43_dma_init(struct b43_wldev *dev)
enum b43_dmatype type;
dmamask = supported_dma_mask(dev);
- switch (dmamask) {
- default:
- B43_WARN_ON(1);
- case DMA_30BIT_MASK:
- type = B43_DMA_30BIT;
- break;
- case DMA_32BIT_MASK:
- type = B43_DMA_32BIT;
- break;
- case DMA_64BIT_MASK:
- type = B43_DMA_64BIT;
- break;
- }
+ type = dma_mask_to_engine_type(dmamask);
err = ssb_dma_set_mask(dev->dev, dmamask);
if (err) {
b43err(dev->wl, "The machine/kernel does not support "
@@ -1113,7 +1114,6 @@ static int dma_tx_fragment(struct b43_dmaring *ring,
size_t hdrsize = b43_txhdr_size(ring->dev);
#define SLOTS_PER_PACKET 2
- B43_WARN_ON(skb_shinfo(skb)->nr_frags);
old_top_slot = ring->current_slot;
old_used_slots = ring->used_slots;
@@ -1257,11 +1257,6 @@ int b43_dma_tx(struct b43_wldev *dev,
int err = 0;
unsigned long flags;
- if (unlikely(skb->len < 2 + 2 + 6)) {
- /* Too short, this can't be a valid frame. */
- return -EINVAL;
- }
-
hdr = (struct ieee80211_hdr *)skb->data;
if (ctl->flags & IEEE80211_TXCTL_SEND_AFTER_DTIM) {
/* The multicast ring will be sent after the DTIM */
@@ -1319,38 +1314,6 @@ out_unlock:
return err;
}
-static void b43_fill_txstatus_report(struct b43_dmaring *ring,
- struct ieee80211_tx_status *report,
- const struct b43_txstatus *status)
-{
- bool frame_failed = 0;
-
- if (status->acked) {
- /* The frame was ACKed. */
- report->flags |= IEEE80211_TX_STATUS_ACK;
- } else {
- /* The frame was not ACKed... */
- if (!(report->control.flags & IEEE80211_TXCTL_NO_ACK)) {
- /* ...but we expected an ACK. */
- frame_failed = 1;
- report->excessive_retries = 1;
- }
- }
- if (status->frame_count == 0) {
- /* The frame was not transmitted at all. */
- report->retry_count = 0;
- } else {
- report->retry_count = status->frame_count - 1;
-#ifdef CONFIG_B43_DEBUG
- if (frame_failed)
- ring->nr_failed_tx_packets++;
- else
- ring->nr_succeed_tx_packets++;
- ring->nr_total_packet_tries += status->frame_count;
-#endif /* DEBUG */
- }
-}
-
/* Called with IRQs disabled. */
void b43_dma_handle_txstatus(struct b43_wldev *dev,
const struct b43_txstatus *status)
@@ -1360,6 +1323,7 @@ void b43_dma_handle_txstatus(struct b43_wldev *dev,
struct b43_dmadesc_generic *desc;
struct b43_dmadesc_meta *meta;
int slot;
+ bool frame_succeed;
ring = parse_cookie(dev, status->cookie, &slot);
if (unlikely(!ring))
@@ -1386,7 +1350,15 @@ void b43_dma_handle_txstatus(struct b43_wldev *dev,
* status of the transmission.
* Some fields of txstat are already filled in dma_tx().
*/
- b43_fill_txstatus_report(ring, &(meta->txstat), status);
+ frame_succeed = b43_fill_txstatus_report(
+ &(meta->txstat), status);
+#ifdef CONFIG_B43_DEBUG
+ if (frame_succeed)
+ ring->nr_succeed_tx_packets++;
+ else
+ ring->nr_failed_tx_packets++;
+ ring->nr_total_packet_tries += status->frame_count;
+#endif /* DEBUG */
ieee80211_tx_status_irqsafe(dev->wl->hw, meta->skb,
&(meta->txstat));
/* skb is freed by ieee80211_tx_status_irqsafe() */
@@ -1573,3 +1545,39 @@ void b43_dma_tx_resume(struct b43_wldev *dev)
b43_dma_tx_resume_ring(dev->dma.tx_ring_AC_BK);
b43_power_saving_ctl_bits(dev, 0);
}
+
+#ifdef CONFIG_B43_PIO
+static void direct_fifo_rx(struct b43_wldev *dev, enum b43_dmatype type,
+ u16 mmio_base, bool enable)
+{
+ u32 ctl;
+
+ if (type == B43_DMA_64BIT) {
+ ctl = b43_read32(dev, mmio_base + B43_DMA64_RXCTL);
+ ctl &= ~B43_DMA64_RXDIRECTFIFO;
+ if (enable)
+ ctl |= B43_DMA64_RXDIRECTFIFO;
+ b43_write32(dev, mmio_base + B43_DMA64_RXCTL, ctl);
+ } else {
+ ctl = b43_read32(dev, mmio_base + B43_DMA32_RXCTL);
+ ctl &= ~B43_DMA32_RXDIRECTFIFO;
+ if (enable)
+ ctl |= B43_DMA32_RXDIRECTFIFO;
+ b43_write32(dev, mmio_base + B43_DMA32_RXCTL, ctl);
+ }
+}
+
+/* Enable/Disable Direct FIFO Receive Mode (PIO) on a RX engine.
+ * This is called from PIO code, so DMA structures are not available. */
+void b43_dma_direct_fifo_rx(struct b43_wldev *dev,
+ unsigned int engine_index, bool enable)
+{
+ enum b43_dmatype type;
+ u16 mmio_base;
+
+ type = dma_mask_to_engine_type(supported_dma_mask(dev));
+
+ mmio_base = b43_dmacontroller_base(type, engine_index);
+ direct_fifo_rx(dev, type, mmio_base, enable);
+}
+#endif /* CONFIG_B43_PIO */
diff --git a/drivers/net/wireless/b43/dma.h b/drivers/net/wireless/b43/dma.h
index ea27085dec0..20acf885dba 100644
--- a/drivers/net/wireless/b43/dma.h
+++ b/drivers/net/wireless/b43/dma.h
@@ -291,4 +291,7 @@ void b43_dma_handle_txstatus(struct b43_wldev *dev,
void b43_dma_rx(struct b43_dmaring *ring);
+void b43_dma_direct_fifo_rx(struct b43_wldev *dev,
+ unsigned int engine_index, bool enable);
+
#endif /* B43_DMA_H_ */
diff --git a/drivers/net/wireless/b43/main.c b/drivers/net/wireless/b43/main.c
index a4e6a59ccac..355f28a2f7f 100644
--- a/drivers/net/wireless/b43/main.c
+++ b/drivers/net/wireless/b43/main.c
@@ -47,6 +47,7 @@
#include "debugfs.h"
#include "phy.h"
#include "dma.h"
+#include "pio.h"
#include "sysfs.h"
#include "xmit.h"
#include "lo.h"
@@ -1593,8 +1594,12 @@ static void b43_interrupt_tasklet(struct b43_wldev *dev)
handle_irq_noise(dev);
/* Check the DMA reason registers for received data. */
- if (dma_reason[0] & B43_DMAIRQ_RX_DONE)
- b43_dma_rx(dev->dma.rx_ring);
+ if (dma_reason[0] & B43_DMAIRQ_RX_DONE) {
+ if (b43_using_pio_transfers(dev))
+ b43_pio_rx(dev->pio.rx_queue);
+ else
+ b43_dma_rx(dev->dma.rx_ring);
+ }
B43_WARN_ON(dma_reason[1] & B43_DMAIRQ_RX_DONE);
B43_WARN_ON(dma_reason[2] & B43_DMAIRQ_RX_DONE);
B43_WARN_ON(dma_reason[3] & B43_DMAIRQ_RX_DONE);
@@ -2698,12 +2703,21 @@ static int b43_op_tx(struct ieee80211_hw *hw,
struct b43_wldev *dev = wl->current_dev;
int err = -ENODEV;
+ if (unlikely(skb->len < 2 + 2 + 6)) {
+ /* Too short, this can't be a valid frame. */
+ return -EINVAL;
+ }
+ B43_WARN_ON(skb_shinfo(skb)->nr_frags);
+
if (unlikely(!dev))
goto out;
if (unlikely(b43_status(dev) < B43_STAT_STARTED))
goto out;
- /* DMA-TX is done without a global lock. */
- err = b43_dma_tx(dev, skb, ctl);
+ /* TX is done without a global lock. */
+ if (b43_using_pio_transfers(dev))
+ err = b43_pio_tx(dev, skb, ctl);
+ else
+ err = b43_dma_tx(dev, skb, ctl);
out:
if (unlikely(err))
return NETDEV_TX_BUSY;
@@ -2897,7 +2911,10 @@ static int b43_op_get_tx_stats(struct ieee80211_hw *hw,
goto out;
spin_lock_irqsave(&wl->irq_lock, flags);
if (likely(b43_status(dev) >= B43_STAT_STARTED)) {
- b43_dma_get_tx_stats(dev, stats);
+ if (b43_using_pio_transfers(dev))
+ b43_pio_get_tx_stats(dev, stats);
+ else
+ b43_dma_get_tx_stats(dev, stats);
err = 0;
}
spin_unlock_irqrestore(&wl->irq_lock, flags);
@@ -3366,6 +3383,7 @@ static void b43_wireless_core_stop(struct b43_wldev *dev)
b43_set_status(dev, B43_STAT_INITIALIZED);
+ b43_pio_stop(dev);
mutex_unlock(&wl->mutex);
/* Must unlock as it would otherwise deadlock. No races here.
* Cancel the possibly running self-rearming periodic work. */
@@ -3683,6 +3701,7 @@ static void b43_wireless_core_exit(struct b43_wldev *dev)
b43_rng_exit(dev->wl, false);
}
b43_dma_free(dev);
+ b43_pio_free(dev);
b43_chip_exit(dev);
b43_radio_turn_off(dev, 1);
b43_switch_analog(dev, 0);
@@ -3780,7 +3799,13 @@ static int b43_wireless_core_init(struct b43_wldev *dev)
/* Maximum Contention Window */
b43_shm_write16(dev, B43_SHM_SCRATCH, B43_SHM_SC_MAXCONT, 0x3FF);
- err = b43_dma_init(dev);
+ if ((dev->dev->bus->bustype == SSB_BUSTYPE_PCMCIA) || B43_FORCE_PIO) {
+ dev->__using_pio_transfers = 1;
+ err = b43_pio_init(dev);
+ } else {
+ dev->__using_pio_transfers = 0;
+ err = b43_dma_init(dev);
+ }
if (err)
goto err_chip_exit;
b43_qos_init(dev);
diff --git a/drivers/net/wireless/b43/pio.c b/drivers/net/wireless/b43/pio.c
new file mode 100644
index 00000000000..e73769ac027
--- /dev/null
+++ b/drivers/net/wireless/b43/pio.c
@@ -0,0 +1,835 @@
+/*
+
+ 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>
+
+
+static void b43_pio_rx_work(struct work_struct *work);
+
+
+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;
+ spin_lock_init(&q->lock);
+ 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;
+ spin_lock_init(&q->lock);
+ q->dev = dev;
+ q->rev = dev->dev->id.revision;
+ 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);
+
+ 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);
+}
+
+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;
+ 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 (b43_modparam_qos) {
+ /* 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 inline void tx_write_2byte_queue(struct b43_pio_txqueue *q,
+ u16 *ctl,
+ const void *_data,
+ unsigned int data_len)
+{
+ const u8 *data = _data;
+ unsigned int i;
+ u16 value;
+
+ *ctl |= B43_PIO_TXCTL_WRITELO | B43_PIO_TXCTL_WRITEHI;
+ b43_piotx_write16(q, B43_PIO_TXCTL, *ctl);
+ for (i = 0; i < data_len; i += 2) {
+ value = data[i];
+ if (i + 1 < data_len) {
+ value |= (u16)(data[i + 1]) << 8;
+ } else {
+ *ctl &= ~B43_PIO_TXCTL_WRITEHI;
+ b43_piotx_write16(q, B43_PIO_TXCTL, *ctl);
+ }
+ b43_piotx_write16(q, B43_PIO_TXDATA, value);
+ }
+}
+
+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. */
+ tx_write_2byte_queue(q, &ctl, hdr, hdrlen);
+ /* Transfer the frame data. */
+ tx_write_2byte_queue(q, &ctl, frame, frame_len);
+
+ ctl |= B43_PIO_TXCTL_EOF;
+ b43_piotx_write16(q, B43_PIO_TXCTL, ctl);
+}
+
+static inline void tx_write_4byte_queue(struct b43_pio_txqueue *q,
+ u32 *ctl,
+ const void *_data,
+ unsigned int data_len)
+{
+ const u8 *data = _data;
+ unsigned int i;
+ u32 value;
+ bool ctl_changed = 0;
+
+ *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);
+ for (i = 0; i < data_len; i += 4) {
+ value = data[i];
+ if (i + 1 < data_len) {
+ value |= (u32)(data[i + 1]) << 8;
+ } else {
+ *ctl &= ~B43_PIO8_TXCTL_8_15;
+ ctl_changed = 1;
+ }
+ if (i + 2 < data_len) {
+ value |= (u32)(data[i + 2]) << 16;
+ } else {
+ *ctl &= ~B43_PIO8_TXCTL_16_23;
+ ctl_changed = 1;
+ }
+ if (i + 3 < data_len) {
+ value |= (u32)(data[i + 3]) << 24;
+ } else {
+ *ctl &= ~B43_PIO8_TXCTL_24_31;
+ ctl_changed = 1;
+ }
+ if (ctl_changed)
+ b43_piotx_write32(q, B43_PIO8_TXCTL, *ctl);
+ b43_piotx_write32(q, B43_PIO8_TXDATA, value);
+ }
+}
+
+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. */
+ tx_write_4byte_queue(q, &ctl, hdr, hdrlen);
+ /* Transfer the frame data. */
+ 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 ieee80211_tx_control *ctl)
+{
+ struct b43_pio_txpacket *pack;
+ struct b43_txhdr txhdr;
+ u16 cookie;
+ int err;
+ unsigned int hdrlen;
+
+ B43_WARN_ON(list_empty(&q->packets_list));
+ pack = list_entry(q->packets_list.next,
+ struct b43_pio_txpacket, list);
+ memset(&pack->txstat, 0, sizeof(pack->txstat));
+ memcpy(&pack->txstat.control, ctl, sizeof(*ctl));
+
+ cookie = generate_cookie(q, pack);
+ hdrlen = b43_txhdr_size(q->dev);
+ err = b43_generate_txhdr(q->dev, (u8 *)&txhdr, skb->data,
+ skb->len, ctl, cookie);
+ if (err)
+ return err;
+
+ if (ctl->flags & IEEE80211_TXCTL_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_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 ieee80211_tx_control *ctl)
+{
+ struct b43_pio_txqueue *q;
+ struct ieee80211_hdr *hdr;
+ unsigned long flags;
+ unsigned int hdrlen, total_len;
+ int err = 0;
+
+ hdr = (struct ieee80211_hdr *)skb->data;
+ if (ctl->flags & IEEE80211_TXCTL_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, ctl->queue);
+ }
+
+ 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;
+ }
+ if (unlikely(q->free_packet_slots == 0)) {
+ err = -ENOBUFS;
+ b43warn(dev->wl, "PIO: TX packet overflow.\n");
+ goto out_unlock;
+ }
+ 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, ctl->queue);
+ q->stopped = 1;
+ goto out_unlock;
+ }
+
+ /* 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 = ctl->queue;
+
+ err = pio_tx_frame(q, skb, ctl);
+ 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_unlock;
+ }
+ if (unlikely(err)) {
+ b43err(dev->wl, "PIO transmission failure\n");
+ goto out_unlock;
+ }
+ 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, ctl->queue);
+ q->stopped = 1;
+ }
+
+out_unlock:
+ spin_unlock_irqrestore(&q->lock, flags);
+
+ return err;
+}
+
+/* Called with IRQs disabled. */
+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;
+
+ q = parse_cookie(dev, status->cookie, &pack);
+ if (unlikely(!q))
+ return;
+ B43_WARN_ON(!pack);
+
+ spin_lock(&q->lock); /* IRQs are already disabled. */
+
+ b43_fill_txstatus_report(&(pack->txstat), 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_irqsafe(dev->wl->hw, pack->skb,
+ &(pack->txstat));
+ 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;
+ struct ieee80211_tx_queue_stats_data *data;
+ unsigned long flags;
+ int i;
+
+ for (i = 0; i < nr_queues; i++) {
+ data = &(stats->data[i]);
+ q = select_queue_by_priority(dev, i);
+
+ spin_lock_irqsave(&q->lock, flags);
+ data->len = B43_PIO_MAX_NR_TXPACKETS - q->free_packet_slots;
+ data->limit = B43_PIO_MAX_NR_TXPACKETS;
+ data->count = q->nr_tx_packets;
+ spin_unlock_irqrestore(&q->lock, flags);
+ }
+}
+
+/* Returns whether we should fetch another frame. */
+static bool pio_rx_frame(struct b43_pio_rxqueue *q)
+{
+ struct b43_rxhdr_fw4 rxhdr;
+ u16 len;
+ u32 macstat;
+ unsigned int i, padding;
+ struct sk_buff *skb;
+ const char *err_msg = NULL;
+
+ 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) {
+ u32 *preamble = (u32 *)&rxhdr;
+ u32 value;
+
+ for (i = 0; i < sizeof(rxhdr); i += 4) {
+ value = b43_piorx_read32(q, B43_PIO8_RXDATA);
+ preamble[i / 4] = cpu_to_le32(value);
+ }
+ } else {
+ u16 *preamble = (u16 *)&rxhdr;
+ u16 value;
+
+ for (i = 0; i < sizeof(rxhdr); i += 2) {
+ value = b43_piorx_read16(q, B43_PIO_RXDATA);
+ preamble[i / 2] = cpu_to_le16(value);
+ }
+ }
+ /* 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) {
+ u32 value;
+
+ for (i = padding; i < len + padding; i += 4) {
+ value = b43_piorx_read32(q, B43_PIO8_RXDATA);
+ skb->data[i] = value;
+ if ((i + 1) < (len + padding))
+ skb->data[i + 1] = value >> 8;
+ if ((i + 2) < (len + padding))
+ skb->data[i + 2] = value >> 16;
+ if ((i + 3) < (len + padding))
+ skb->data[i + 3] = value >> 24;
+ }
+ } else {
+ u16 value;
+
+ for (i = padding; i < len + padding; i += 2) {
+ value = b43_piorx_read16(q, B43_PIO_RXDATA);
+ skb->data[i] = value;
+ if ((i + 1) < (len + padding))
+ skb->data[i + 1] = value >> 8;
+ }
+ }
+
+ b43_rx(q->dev, skb, &rxhdr);
+
+ return 1;
+
+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;
+}
+
+/* RX workqueue. We can sleep, yay! */
+static void b43_pio_rx_work(struct work_struct *work)
+{
+ struct b43_pio_rxqueue *q = container_of(work, struct b43_pio_rxqueue,
+ rx_work);
+ unsigned int budget = 50;
+ bool stop;
+
+ do {
+ spin_lock_irq(&q->lock);
+ 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);
+}
+
+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)
+ | B43_PIO8_TXCTL_SUSPREQ);
+ } else {
+ b43_piotx_write16(q, B43_PIO_TXCTL,
+ 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)
+ & ~B43_PIO8_TXCTL_SUSPREQ);
+ } else {
+ b43_piotx_write16(q, B43_PIO_TXCTL,
+ 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)
+{
+ 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);
+}
diff --git a/drivers/net/wireless/b43/pio.h b/drivers/net/wireless/b43/pio.h
new file mode 100644
index 00000000000..e2ec676cc9e
--- /dev/null
+++ b/drivers/net/wireless/b43/pio.h
@@ -0,0 +1,220 @@
+#ifndef B43_PIO_H_
+#define B43_PIO_H_
+
+#include "b43.h"
+
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/list.h>
+#include <linux/skbuff.h>
+
+
+/*** Registers for PIO queues up to revision 7. ***/
+/* TX queue. */
+#define B43_PIO_TXCTL 0x00
+#define B43_PIO_TXCTL_WRITELO 0x0001
+#define B43_PIO_TXCTL_WRITEHI 0x0002
+#define B43_PIO_TXCTL_EOF 0x0004
+#define B43_PIO_TXCTL_FREADY 0x0008
+#define B43_PIO_TXCTL_FLUSHREQ 0x0020
+#define B43_PIO_TXCTL_FLUSHPEND 0x0040
+#define B43_PIO_TXCTL_SUSPREQ 0x0080
+#define B43_PIO_TXCTL_QSUSP 0x0100
+#define B43_PIO_TXCTL_COMMCNT 0xFC00
+#define B43_PIO_TXCTL_COMMCNT_SHIFT 10
+#define B43_PIO_TXDATA 0x02
+#define B43_PIO_TXQBUFSIZE 0x04
+/* RX queue. */
+#define B43_PIO_RXCTL 0x00
+#define B43_PIO_RXCTL_FRAMERDY 0x0001
+#define B43_PIO_RXCTL_DATARDY 0x0002
+#define B43_PIO_RXDATA 0x02
+
+/*** Registers for PIO queues revision 8 and later. ***/
+/* TX queue */
+#define B43_PIO8_TXCTL 0x00
+#define B43_PIO8_TXCTL_0_7 0x00000001
+#define B43_PIO8_TXCTL_8_15 0x00000002
+#define B43_PIO8_TXCTL_16_23 0x00000004
+#define B43_PIO8_TXCTL_24_31 0x00000008
+#define B43_PIO8_TXCTL_EOF 0x00000010
+#define B43_PIO8_TXCTL_FREADY 0x00000080
+#define B43_PIO8_TXCTL_SUSPREQ 0x00000100
+#define B43_PIO8_TXCTL_QSUSP 0x00000200
+#define B43_PIO8_TXCTL_FLUSHREQ 0x00000400
+#define B43_PIO8_TXCTL_FLUSHPEND 0x00000800
+#define B43_PIO8_TXDATA 0x04
+/* RX queue */
+#define B43_PIO8_RXCTL 0x00
+#define B43_PIO8_RXCTL_FRAMERDY 0x00000001
+#define B43_PIO8_RXCTL_DATARDY 0x00000002
+#define B43_PIO8_RXDATA 0x04
+
+
+/* The maximum number of TX-packets the HW can handle. */
+#define B43_PIO_MAX_NR_TXPACKETS 32
+
+
+#ifdef CONFIG_B43_PIO
+
+struct b43_pio_txpacket {
+ /* Pointer to the TX queue we belong to. */
+ struct b43_pio_txqueue *queue;
+ /* The TX data packet. */
+ struct sk_buff *skb;
+ /* The status meta data. */
+ struct ieee80211_tx_status txstat;
+ /* Index in the (struct b43_pio_txqueue)->packets array. */
+ u8 index;
+
+ struct list_head list;
+};
+
+struct b43_pio_txqueue {
+ struct b43_wldev *dev;
+ spinlock_t lock;
+ u16 mmio_base;
+
+ /* The device queue buffer size in bytes. */
+ u16 buffer_size;
+ /* The number of used bytes in the device queue buffer. */
+ u16 buffer_used;
+ /* The number of packets that can still get queued.
+ * This is decremented on queueing a packet and incremented
+ * after receiving the transmit status. */
+ u16 free_packet_slots;
+
+ /* True, if the mac80211 queue was stopped due to overflow at TX. */
+ bool stopped;
+ /* Our b43 queue index number */
+ u8 index;
+ /* The mac80211 QoS queue priority. */
+ u8 queue_prio;
+
+ /* Buffer for TX packet meta data. */
+ struct b43_pio_txpacket packets[B43_PIO_MAX_NR_TXPACKETS];
+ struct list_head packets_list;
+
+ /* Total number of transmitted packets. */
+ unsigned int nr_tx_packets;
+
+ /* Shortcut to the 802.11 core revision. This is to
+ * avoid horrible pointer dereferencing in the fastpaths. */
+ u8 rev;
+};
+
+struct b43_pio_rxqueue {
+ struct b43_wldev *dev;
+ spinlock_t lock;
+ u16 mmio_base;
+
+ /* Work to reduce latency issues on RX. */
+ struct work_struct rx_work;
+
+ /* Shortcut to the 802.11 core revision. This is to
+ * avoid horrible pointer dereferencing in the fastpaths. */
+ u8 rev;
+};
+
+
+static inline u16 b43_piotx_read16(struct b43_pio_txqueue *q, u16 offset)
+{
+ return b43_read16(q->dev, q->mmio_base + offset);
+}
+
+static inline u32 b43_piotx_read32(struct b43_pio_txqueue *q, u16 offset)
+{
+ return b43_read32(q->dev, q->mmio_base + offset);
+}
+
+static inline void b43_piotx_write16(struct b43_pio_txqueue *q,
+ u16 offset, u16 value)
+{
+ b43_write16(q->dev, q->mmio_base + offset, value);
+}
+
+static inline void b43_piotx_write32(struct b43_pio_txqueue *q,
+ u16 offset, u32 value)
+{
+ b43_write32(q->dev, q->mmio_base + offset, value);
+}
+
+
+static inline u16 b43_piorx_read16(struct b43_pio_rxqueue *q, u16 offset)
+{
+ return b43_read16(q->dev, q->mmio_base + offset);
+}
+
+static inline u32 b43_piorx_read32(struct b43_pio_rxqueue *q, u16 offset)
+{
+ return b43_read32(q->dev, q->mmio_base + offset);
+}
+
+static inline void b43_piorx_write16(struct b43_pio_rxqueue *q,
+ u16 offset, u16 value)
+{
+ b43_write16(q->dev, q->mmio_base + offset, value);
+}
+
+static inline void b43_piorx_write32(struct b43_pio_rxqueue *q,
+ u16 offset, u32 value)
+{
+ b43_write32(q->dev, q->mmio_base + offset, value);
+}
+
+
+int b43_pio_init(struct b43_wldev *dev);
+void b43_pio_stop(struct b43_wldev *dev);
+void b43_pio_free(struct b43_wldev *dev);
+
+int b43_pio_tx(struct b43_wldev *dev,
+ struct sk_buff *skb, struct ieee80211_tx_control *ctl);
+void b43_pio_handle_txstatus(struct b43_wldev *dev,
+ const struct b43_txstatus *status);
+void b43_pio_get_tx_stats(struct b43_wldev *dev,
+ struct ieee80211_tx_queue_stats *stats);
+void b43_pio_rx(struct b43_pio_rxqueue *q);
+
+void b43_pio_tx_suspend(struct b43_wldev *dev);
+void b43_pio_tx_resume(struct b43_wldev *dev);
+
+
+#else /* CONFIG_B43_PIO */
+
+
+static inline int b43_pio_init(struct b43_wldev *dev)
+{
+ return 0;
+}
+static inline void b43_pio_free(struct b43_wldev *dev)
+{
+}
+static inline void b43_pio_stop(struct b43_wldev *dev)
+{
+}
+static inline int b43_pio_tx(struct b43_wldev *dev,
+ struct sk_buff *skb,
+ struct ieee80211_tx_control *ctl)
+{
+ return 0;
+}
+static inline void b43_pio_handle_txstatus(struct b43_wldev *dev,
+ const struct b43_txstatus *status)
+{
+}
+static inline void b43_pio_get_tx_stats(struct b43_wldev *dev,
+ struct ieee80211_tx_queue_stats *stats)
+{
+}
+static inline void b43_pio_rx(struct b43_pio_rxqueue *q)
+{
+}
+static inline void b43_pio_tx_suspend(struct b43_wldev *dev)
+{
+}
+static inline void b43_pio_tx_resume(struct b43_wldev *dev)
+{
+}
+
+#endif /* CONFIG_B43_PIO */
+#endif /* B43_PIO_H_ */
diff --git a/drivers/net/wireless/b43/xmit.c b/drivers/net/wireless/b43/xmit.c
index ec10a8e182f..b2a3123f42d 100644
--- a/drivers/net/wireless/b43/xmit.c
+++ b/drivers/net/wireless/b43/xmit.c
@@ -30,6 +30,7 @@
#include "xmit.h"
#include "phy.h"
#include "dma.h"
+#include "pio.h"
/* Extract the bitrate index out of a CCK PLCP header. */
@@ -668,40 +669,54 @@ void b43_handle_txstatus(struct b43_wldev *dev,
dev->wl->ieee_stats.dot11RTSSuccessCount++;
}
- b43_dma_handle_txstatus(dev, status);
+ if (b43_using_pio_transfers(dev))
+ b43_pio_handle_txstatus(dev, status);
+ else
+ b43_dma_handle_txstatus(dev, status);
}
-/* Handle TX status report as received through DMA/PIO queues */
-void b43_handle_hwtxstatus(struct b43_wldev *dev,
- const struct b43_hwtxstatus *hw)
+/* Fill out the mac80211 TXstatus report based on the b43-specific
+ * txstatus report data. This returns a boolean whether the frame was
+ * successfully transmitted. */
+bool b43_fill_txstatus_report(struct ieee80211_tx_status *report,
+ const struct b43_txstatus *status)
{
- struct b43_txstatus status;
- u8 tmp;
-
- status.cookie = le16_to_cpu(hw->cookie);
- status.seq = le16_to_cpu(hw->seq);
- status.phy_stat = hw->phy_stat;
- tmp = hw->count;
- status.frame_count = (tmp >> 4);
- status.rts_count = (tmp & 0x0F);
- tmp = hw->flags;
- status.supp_reason = ((tmp & 0x1C) >> 2);
- status.pm_indicated = !!(tmp & 0x80);
- status.intermediate = !!(tmp & 0x40);
- status.for_ampdu = !!(tmp & 0x20);
- status.acked = !!(tmp & 0x02);
-
- b43_handle_txstatus(dev, &status);
+ bool frame_success = 1;
+
+ if (status->acked) {
+ /* The frame was ACKed. */
+ report->flags |= IEEE80211_TX_STATUS_ACK;
+ } else {
+ /* The frame was not ACKed... */
+ if (!(report->control.flags & IEEE80211_TXCTL_NO_ACK)) {
+ /* ...but we expected an ACK. */
+ frame_success = 0;
+ report->excessive_retries = 1;
+ }
+ }
+ if (status->frame_count == 0) {
+ /* The frame was not transmitted at all. */
+ report->retry_count = 0;
+ } else
+ report->retry_count = status->frame_count - 1;
+
+ return frame_success;
}
/* Stop any TX operation on the device (suspend the hardware queues) */
void b43_tx_suspend(struct b43_wldev *dev)
{
- b43_dma_tx_suspend(dev);
+ if (b43_using_pio_transfers(dev))
+ b43_pio_tx_suspend(dev);
+ else
+ b43_dma_tx_suspend(dev);
}
/* Resume any TX operation on the device (resume the hardware queues) */
void b43_tx_resume(struct b43_wldev *dev)
{
- b43_dma_tx_resume(dev);
+ if (b43_using_pio_transfers(dev))
+ b43_pio_tx_resume(dev);
+ else
+ b43_dma_tx_resume(dev);
}
diff --git a/drivers/net/wireless/b43/xmit.h b/drivers/net/wireless/b43/xmit.h
index bf58a8a8525..4f26988a513 100644
--- a/drivers/net/wireless/b43/xmit.h
+++ b/drivers/net/wireless/b43/xmit.h
@@ -207,18 +207,6 @@ enum {
B43_TXST_SUPP_ABNACK, /* Afterburner NACK */
};
-/* Transmit Status as received through DMA/PIO on old chips */
-struct b43_hwtxstatus {
- PAD_BYTES(4);
- __le16 cookie;
- u8 flags;
- u8 count;
- PAD_BYTES(2);
- __le16 seq;
- u8 phy_stat;
- PAD_BYTES(1);
-} __attribute__ ((__packed__));
-
/* Receive header for v4 firmware. */
struct b43_rxhdr_fw4 {
__le16 frame_len; /* Frame length */
@@ -295,9 +283,8 @@ void b43_rx(struct b43_wldev *dev, struct sk_buff *skb, const void *_rxhdr);
void b43_handle_txstatus(struct b43_wldev *dev,
const struct b43_txstatus *status);
-
-void b43_handle_hwtxstatus(struct b43_wldev *dev,
- const struct b43_hwtxstatus *hw);
+bool b43_fill_txstatus_report(struct ieee80211_tx_status *report,
+ const struct b43_txstatus *status);
void b43_tx_suspend(struct b43_wldev *dev);
void b43_tx_resume(struct b43_wldev *dev);