#define B43_MMIO_TSF_2 0x636 /* core rev < 3 only */
#define B43_MMIO_TSF_3 0x638 /* core rev < 3 only */
#define B43_MMIO_RNG 0x65A
+#define B43_MMIO_IFSCTL 0x688 /* Interframe space control */
+#define B43_MMIO_IFSCTL_USE_EDCF 0x0004
#define B43_MMIO_POWERUP_DELAY 0x6A8
/* SPROM boardflags_lo values */
u8 algorithm;
};
+/* SHM offsets to the QOS data structures for the 4 different queues. */
+#define B43_QOS_PARAMS(queue) (B43_SHM_SH_EDCFQ + \
+ (B43_NR_QOSPARAMS * sizeof(u16) * (queue)))
+#define B43_QOS_BACKGROUND B43_QOS_PARAMS(0)
+#define B43_QOS_BESTEFFORT B43_QOS_PARAMS(1)
+#define B43_QOS_VIDEO B43_QOS_PARAMS(2)
+#define B43_QOS_VOICE B43_QOS_PARAMS(3)
+
+/* QOS parameter hardware data structure offsets. */
+#define B43_NR_QOSPARAMS 22
+enum {
+ B43_QOSPARAM_TXOP = 0,
+ B43_QOSPARAM_CWMIN,
+ B43_QOSPARAM_CWMAX,
+ B43_QOSPARAM_CWCUR,
+ B43_QOSPARAM_AIFS,
+ B43_QOSPARAM_BSLOTS,
+ B43_QOSPARAM_REGGAP,
+ B43_QOSPARAM_STATUS,
+};
+
+/* QOS parameters for a queue. */
+struct b43_qos_params {
+ /* The QOS parameters */
+ struct ieee80211_tx_queue_params p;
+ /* Does this need to get uploaded to hardware? */
+ bool need_hw_update;
+};
+
struct b43_wldev;
/* Data structure for the WLAN parts (802.11 cores) of the b43 chip. */
struct sk_buff *current_beacon;
bool beacon0_uploaded;
bool beacon1_uploaded;
+
+ /* The current QOS parameters for the 4 queues.
+ * This is protected by the irq_lock. */
+ struct b43_qos_params qos_params[4];
+ /* Workqueue for updating QOS parameters in hardware. */
+ struct work_struct qos_update_work;
};
/* In-memory representation of a cached microcode file. */
return slot;
}
-/* Mac80211-queue to b43-ring mapping */
-static struct b43_dmaring *priority_to_txring(struct b43_wldev *dev,
- int queue_priority)
-{
- struct b43_dmaring *ring;
-
-/*FIXME: For now we always run on TX-ring-1 */
- return dev->dma.tx_ring1;
-
- /* 0 = highest priority */
- switch (queue_priority) {
- default:
- B43_WARN_ON(1);
- /* fallthrough */
- case 0:
- ring = dev->dma.tx_ring3;
- break;
- case 1:
- ring = dev->dma.tx_ring2;
- break;
- case 2:
- ring = dev->dma.tx_ring1;
- break;
- case 3:
- ring = dev->dma.tx_ring0;
- break;
- }
-
- return ring;
-}
-
-/* b43-ring to mac80211-queue mapping */
-static inline int txring_to_priority(struct b43_dmaring *ring)
-{
- static const u8 idx_to_prio[] = { 3, 2, 1, 0, };
- unsigned int index;
-
-/*FIXME: have only one queue, for now */
- return 0;
-
- index = ring->index;
- if (B43_WARN_ON(index >= ARRAY_SIZE(idx_to_prio)))
- index = 0;
- return idx_to_prio[index];
-}
-
static u16 b43_dmacontroller_base(enum b43_dmatype type, int controller_idx)
{
static const u16 map64[] = {
return 0;
}
+/* Static mapping of mac80211's queues (priorities) to b43 DMA rings. */
+static struct b43_dmaring * select_ring_by_priority(struct b43_wldev *dev,
+ u8 queue_prio)
+{
+ struct b43_dmaring *ring;
+
+ if (b43_modparam_qos) {
+ /* 0 = highest priority */
+ switch (queue_prio) {
+ default:
+ B43_WARN_ON(1);
+ /* fallthrough */
+ case 0:
+ ring = dev->dma.tx_ring3; /* AC_VO */
+ break;
+ case 1:
+ ring = dev->dma.tx_ring2; /* AC_VI */
+ break;
+ case 2:
+ ring = dev->dma.tx_ring1; /* AC_BE */
+ break;
+ case 3:
+ ring = dev->dma.tx_ring0; /* AC_BK */
+ break;
+ }
+ } else
+ ring = dev->dma.tx_ring1;
+
+ return ring;
+}
+
int b43_dma_tx(struct b43_wldev *dev,
struct sk_buff *skb, struct ieee80211_tx_control *ctl)
{
hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_MOREDATA);
} else {
/* Decide by priority where to put this frame. */
- ring = priority_to_txring(dev, ctl->queue);
+ ring = select_ring_by_priority(dev, ctl->queue);
}
spin_lock_irqsave(&ring->lock, flags);
* That would be a mac80211 bug. */
B43_WARN_ON(ring->stopped);
+ /* Assign the queue number to the ring (if not already done before)
+ * so TX status handling can use it. The queue to ring mapping is
+ * static, so we don't need to store it per frame. */
+ ring->queue_prio = ctl->queue;
+
err = dma_tx_fragment(ring, skb, ctl);
if (unlikely(err == -ENOKEY)) {
/* Drop this packet, as we don't have the encryption key
if ((free_slots(ring) < SLOTS_PER_PACKET) ||
should_inject_overflow(ring)) {
/* This TX ring is full. */
- ieee80211_stop_queue(dev->wl->hw, txring_to_priority(ring));
+ ieee80211_stop_queue(dev->wl->hw, ctl->queue);
ring->stopped = 1;
if (b43_debug(dev, B43_DBG_DMAVERBOSE)) {
b43dbg(dev->wl, "Stopped TX ring %d\n", ring->index);
dev->stats.last_tx = jiffies;
if (ring->stopped) {
B43_WARN_ON(free_slots(ring) < SLOTS_PER_PACKET);
- ieee80211_wake_queue(dev->wl->hw, txring_to_priority(ring));
+ ieee80211_wake_queue(dev->wl->hw, ring->queue_prio);
ring->stopped = 0;
if (b43_debug(dev, B43_DBG_DMAVERBOSE)) {
b43dbg(dev->wl, "Woke up TX ring %d\n", ring->index);
for (i = 0; i < nr_queues; i++) {
data = &(stats->data[i]);
- ring = priority_to_txring(dev, i);
+ ring = select_ring_by_priority(dev, i);
spin_lock_irqsave(&ring->lock, flags);
data->len = ring->used_slots / SLOTS_PER_PACKET;
module_param_named(nohwcrypt, modparam_nohwcrypt, int, 0444);
MODULE_PARM_DESC(nohwcrypt, "Disable hardware encryption.");
+int b43_modparam_qos = 1;
+module_param_named(qos, b43_modparam_qos, int, 0444);
+MODULE_PARM_DESC(qos, "Enable QOS support (default on)");
+
+
static const struct ssb_device_id b43_ssb_tbl[] = {
SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_80211, 5),
SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_80211, 6),
return NETDEV_TX_OK;
}
+/* Locking: wl->irq_lock */
+static void b43_qos_params_upload(struct b43_wldev *dev,
+ const struct ieee80211_tx_queue_params *p,
+ u16 shm_offset)
+{
+ u16 params[B43_NR_QOSPARAMS];
+ int cw_min, cw_max, aifs, bslots, tmp;
+ unsigned int i;
+
+ const u16 aCWmin = 0x0001;
+ const u16 aCWmax = 0x03FF;
+
+ /* Calculate the default values for the parameters, if needed. */
+ switch (shm_offset) {
+ case B43_QOS_VOICE:
+ aifs = (p->aifs == -1) ? 2 : p->aifs;
+ cw_min = (p->cw_min == 0) ? ((aCWmin + 1) / 4 - 1) : p->cw_min;
+ cw_max = (p->cw_max == 0) ? ((aCWmin + 1) / 2 - 1) : p->cw_max;
+ break;
+ case B43_QOS_VIDEO:
+ aifs = (p->aifs == -1) ? 2 : p->aifs;
+ cw_min = (p->cw_min == 0) ? ((aCWmin + 1) / 2 - 1) : p->cw_min;
+ cw_max = (p->cw_max == 0) ? aCWmin : p->cw_max;
+ break;
+ case B43_QOS_BESTEFFORT:
+ aifs = (p->aifs == -1) ? 3 : p->aifs;
+ cw_min = (p->cw_min == 0) ? aCWmin : p->cw_min;
+ cw_max = (p->cw_max == 0) ? aCWmax : p->cw_max;
+ break;
+ case B43_QOS_BACKGROUND:
+ aifs = (p->aifs == -1) ? 7 : p->aifs;
+ cw_min = (p->cw_min == 0) ? aCWmin : p->cw_min;
+ cw_max = (p->cw_max == 0) ? aCWmax : p->cw_max;
+ break;
+ default:
+ B43_WARN_ON(1);
+ return;
+ }
+ if (cw_min <= 0)
+ cw_min = aCWmin;
+ if (cw_max <= 0)
+ cw_max = aCWmin;
+ bslots = b43_read16(dev, B43_MMIO_RNG) % cw_min;
+
+ memset(¶ms, 0, sizeof(params));
+
+ params[B43_QOSPARAM_TXOP] = p->txop * 32;
+ params[B43_QOSPARAM_CWMIN] = cw_min;
+ params[B43_QOSPARAM_CWMAX] = cw_max;
+ params[B43_QOSPARAM_CWCUR] = cw_min;
+ params[B43_QOSPARAM_AIFS] = aifs;
+ params[B43_QOSPARAM_BSLOTS] = bslots;
+ params[B43_QOSPARAM_REGGAP] = bslots + aifs;
+
+ for (i = 0; i < ARRAY_SIZE(params); i++) {
+ if (i == B43_QOSPARAM_STATUS) {
+ tmp = b43_shm_read16(dev, B43_SHM_SHARED,
+ shm_offset + (i * 2));
+ /* Mark the parameters as updated. */
+ tmp |= 0x100;
+ b43_shm_write16(dev, B43_SHM_SHARED,
+ shm_offset + (i * 2),
+ tmp);
+ } else {
+ b43_shm_write16(dev, B43_SHM_SHARED,
+ shm_offset + (i * 2),
+ params[i]);
+ }
+ }
+}
+
+/* Update the QOS parameters in hardware. */
+static void b43_qos_update(struct b43_wldev *dev)
+{
+ struct b43_wl *wl = dev->wl;
+ struct b43_qos_params *params;
+ unsigned long flags;
+ unsigned int i;
+
+ /* Mapping of mac80211 queues to b43 SHM offsets. */
+ static const u16 qos_shm_offsets[] = {
+ [0] = B43_QOS_VOICE,
+ [1] = B43_QOS_VIDEO,
+ [2] = B43_QOS_BESTEFFORT,
+ [3] = B43_QOS_BACKGROUND,
+ };
+ BUILD_BUG_ON(ARRAY_SIZE(qos_shm_offsets) != ARRAY_SIZE(wl->qos_params));
+
+ b43_mac_suspend(dev);
+ spin_lock_irqsave(&wl->irq_lock, flags);
+
+ for (i = 0; i < ARRAY_SIZE(wl->qos_params); i++) {
+ params = &(wl->qos_params[i]);
+ if (params->need_hw_update) {
+ b43_qos_params_upload(dev, &(params->p),
+ qos_shm_offsets[i]);
+ params->need_hw_update = 0;
+ }
+ }
+
+ spin_unlock_irqrestore(&wl->irq_lock, flags);
+ b43_mac_enable(dev);
+}
+
+static void b43_qos_clear(struct b43_wl *wl)
+{
+ struct b43_qos_params *params;
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(wl->qos_params); i++) {
+ params = &(wl->qos_params[i]);
+
+ memset(&(params->p), 0, sizeof(params->p));
+ params->p.aifs = -1;
+ params->need_hw_update = 1;
+ }
+}
+
+/* Initialize the core's QOS capabilities */
+static void b43_qos_init(struct b43_wldev *dev)
+{
+ struct b43_wl *wl = dev->wl;
+ unsigned int i;
+
+ /* Upload the current QOS parameters. */
+ for (i = 0; i < ARRAY_SIZE(wl->qos_params); i++)
+ wl->qos_params[i].need_hw_update = 1;
+ b43_qos_update(dev);
+
+ /* Enable QOS support. */
+ b43_hf_write(dev, b43_hf_read(dev) | B43_HF_EDCF);
+ b43_write16(dev, B43_MMIO_IFSCTL,
+ b43_read16(dev, B43_MMIO_IFSCTL)
+ | B43_MMIO_IFSCTL_USE_EDCF);
+}
+
+static void b43_qos_update_work(struct work_struct *work)
+{
+ struct b43_wl *wl = container_of(work, struct b43_wl, qos_update_work);
+ struct b43_wldev *dev;
+
+ mutex_lock(&wl->mutex);
+ dev = wl->current_dev;
+ if (likely(dev && (b43_status(dev) >= B43_STAT_INITIALIZED)))
+ b43_qos_update(dev);
+ mutex_unlock(&wl->mutex);
+}
+
static int b43_op_conf_tx(struct ieee80211_hw *hw,
- int queue,
+ int _queue,
const struct ieee80211_tx_queue_params *params)
{
+ struct b43_wl *wl = hw_to_b43_wl(hw);
+ unsigned long flags;
+ unsigned int queue = (unsigned int)_queue;
+ struct b43_qos_params *p;
+
+ if (queue >= ARRAY_SIZE(wl->qos_params)) {
+ /* Queue not available or don't support setting
+ * params on this queue. Return success to not
+ * confuse mac80211. */
+ return 0;
+ }
+
+ spin_lock_irqsave(&wl->irq_lock, flags);
+ p = &(wl->qos_params[queue]);
+ memcpy(&(p->p), params, sizeof(p->p));
+ p->need_hw_update = 1;
+ spin_unlock_irqrestore(&wl->irq_lock, flags);
+
+ queue_work(hw->workqueue, &wl->qos_update_work);
+
return 0;
}
memset(wl->mac_addr, 0, ETH_ALEN);
wl->filter_flags = 0;
wl->radiotap_enabled = 0;
+ b43_qos_clear(wl);
/* First register RFkill.
* LEDs that are registered later depend on it. */
struct b43_wldev *dev = wl->current_dev;
b43_rfkill_exit(dev);
+ cancel_work_sync(&(wl->qos_update_work));
mutex_lock(&wl->mutex);
if (b43_status(dev) >= B43_STAT_STARTED)
hw->max_signal = 100;
hw->max_rssi = -110;
hw->max_noise = -110;
- hw->queues = 1; /* FIXME: hardware has more queues */
+ hw->queues = b43_modparam_qos ? 4 : 1;
SET_IEEE80211_DEV(hw, dev->dev);
if (is_valid_ether_addr(sprom->et1mac))
SET_IEEE80211_PERM_ADDR(hw, sprom->et1mac);
spin_lock_init(&wl->shm_lock);
mutex_init(&wl->mutex);
INIT_LIST_HEAD(&wl->devlist);
+ INIT_WORK(&wl->qos_update_work, b43_qos_update_work);
ssb_set_devtypedata(dev, wl);
b43info(wl, "Broadcom %04X WLAN found\n", dev->bus->chip_id);
projects / linux-2.6 / commitdiff