diff options
Diffstat (limited to 'drivers/net/wireless/rt2x00/rt2x00queue.c')
| -rw-r--r-- | drivers/net/wireless/rt2x00/rt2x00queue.c | 1025 |
1 files changed, 716 insertions, 309 deletions
diff --git a/drivers/net/wireless/rt2x00/rt2x00queue.c b/drivers/net/wireless/rt2x00/rt2x00queue.c index 239afc7a9c0..5642ccceca7 100644 --- a/drivers/net/wireless/rt2x00/rt2x00queue.c +++ b/drivers/net/wireless/rt2x00/rt2x00queue.c @@ -1,5 +1,6 @@ /* - Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com> + Copyright (C) 2010 Willow Garage <http://www.willowgarage.com> + Copyright (C) 2004 - 2010 Ivo van Doorn <IvDoorn@gmail.com> Copyright (C) 2004 - 2009 Gertjan van Wingerde <gwingerde@gmail.com> <http://rt2x00.serialmonkey.com> @@ -14,9 +15,7 @@ GNU General Public License for more details. You should have received a copy of the GNU General Public License - along with this program; if not, write to the - Free Software Foundation, Inc., - 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + along with this program; if not, see <http://www.gnu.org/licenses/>. */ /* @@ -24,6 +23,7 @@ Abstract: rt2x00 queue specific routines. */ +#include <linux/slab.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/dma-mapping.h> @@ -31,9 +31,10 @@ #include "rt2x00.h" #include "rt2x00lib.h" -struct sk_buff *rt2x00queue_alloc_rxskb(struct rt2x00_dev *rt2x00dev, - struct queue_entry *entry) +struct sk_buff *rt2x00queue_alloc_rxskb(struct queue_entry *entry, gfp_t gfp) { + struct data_queue *queue = entry->queue; + struct rt2x00_dev *rt2x00dev = queue->rt2x00dev; struct sk_buff *skb; struct skb_frame_desc *skbdesc; unsigned int frame_size; @@ -44,7 +45,7 @@ struct sk_buff *rt2x00queue_alloc_rxskb(struct rt2x00_dev *rt2x00dev, * The frame size includes descriptor size, because the * hardware directly receive the frame into the skbuffer. */ - frame_size = entry->queue->data_size + entry->queue->desc_size; + frame_size = queue->data_size + queue->desc_size + queue->winfo_size; /* * The payload should be aligned to a 4-byte boundary, @@ -58,7 +59,7 @@ struct sk_buff *rt2x00queue_alloc_rxskb(struct rt2x00_dev *rt2x00dev, * at least 8 bytes bytes available in headroom for IV/EIV * and 8 bytes for ICV data as tailroon. */ - if (test_bit(CONFIG_SUPPORT_HW_CRYPTO, &rt2x00dev->flags)) { + if (rt2x00_has_cap_hw_crypto(rt2x00dev)) { head_size += 8; tail_size += 8; } @@ -66,7 +67,7 @@ struct sk_buff *rt2x00queue_alloc_rxskb(struct rt2x00_dev *rt2x00dev, /* * Allocate skbuffer. */ - skb = dev_alloc_skb(frame_size + head_size + tail_size); + skb = __dev_alloc_skb(frame_size + head_size + tail_size, gfp); if (!skb) return NULL; @@ -84,69 +85,64 @@ struct sk_buff *rt2x00queue_alloc_rxskb(struct rt2x00_dev *rt2x00dev, memset(skbdesc, 0, sizeof(*skbdesc)); skbdesc->entry = entry; - if (test_bit(DRIVER_REQUIRE_DMA, &rt2x00dev->flags)) { - skbdesc->skb_dma = dma_map_single(rt2x00dev->dev, - skb->data, - skb->len, - DMA_FROM_DEVICE); + if (test_bit(REQUIRE_DMA, &rt2x00dev->cap_flags)) { + dma_addr_t skb_dma; + + skb_dma = dma_map_single(rt2x00dev->dev, skb->data, skb->len, + DMA_FROM_DEVICE); + if (unlikely(dma_mapping_error(rt2x00dev->dev, skb_dma))) { + dev_kfree_skb_any(skb); + return NULL; + } + + skbdesc->skb_dma = skb_dma; skbdesc->flags |= SKBDESC_DMA_MAPPED_RX; } return skb; } -void rt2x00queue_map_txskb(struct rt2x00_dev *rt2x00dev, struct sk_buff *skb) +int rt2x00queue_map_txskb(struct queue_entry *entry) { - struct skb_frame_desc *skbdesc = get_skb_frame_desc(skb); - - /* - * If device has requested headroom, we should make sure that - * is also mapped to the DMA so it can be used for transfering - * additional descriptor information to the hardware. - */ - skb_push(skb, rt2x00dev->hw->extra_tx_headroom); + struct device *dev = entry->queue->rt2x00dev->dev; + struct skb_frame_desc *skbdesc = get_skb_frame_desc(entry->skb); skbdesc->skb_dma = - dma_map_single(rt2x00dev->dev, skb->data, skb->len, DMA_TO_DEVICE); + dma_map_single(dev, entry->skb->data, entry->skb->len, DMA_TO_DEVICE); - /* - * Restore data pointer to original location again. - */ - skb_pull(skb, rt2x00dev->hw->extra_tx_headroom); + if (unlikely(dma_mapping_error(dev, skbdesc->skb_dma))) + return -ENOMEM; skbdesc->flags |= SKBDESC_DMA_MAPPED_TX; + return 0; } EXPORT_SYMBOL_GPL(rt2x00queue_map_txskb); -void rt2x00queue_unmap_skb(struct rt2x00_dev *rt2x00dev, struct sk_buff *skb) +void rt2x00queue_unmap_skb(struct queue_entry *entry) { - struct skb_frame_desc *skbdesc = get_skb_frame_desc(skb); + struct device *dev = entry->queue->rt2x00dev->dev; + struct skb_frame_desc *skbdesc = get_skb_frame_desc(entry->skb); if (skbdesc->flags & SKBDESC_DMA_MAPPED_RX) { - dma_unmap_single(rt2x00dev->dev, skbdesc->skb_dma, skb->len, + dma_unmap_single(dev, skbdesc->skb_dma, entry->skb->len, DMA_FROM_DEVICE); skbdesc->flags &= ~SKBDESC_DMA_MAPPED_RX; - } - - if (skbdesc->flags & SKBDESC_DMA_MAPPED_TX) { - /* - * Add headroom to the skb length, it has been removed - * by the driver, but it was actually mapped to DMA. - */ - dma_unmap_single(rt2x00dev->dev, skbdesc->skb_dma, - skb->len + rt2x00dev->hw->extra_tx_headroom, + } else if (skbdesc->flags & SKBDESC_DMA_MAPPED_TX) { + dma_unmap_single(dev, skbdesc->skb_dma, entry->skb->len, DMA_TO_DEVICE); skbdesc->flags &= ~SKBDESC_DMA_MAPPED_TX; } } +EXPORT_SYMBOL_GPL(rt2x00queue_unmap_skb); -void rt2x00queue_free_skb(struct rt2x00_dev *rt2x00dev, struct sk_buff *skb) +void rt2x00queue_free_skb(struct queue_entry *entry) { - if (!skb) + if (!entry->skb) return; - rt2x00queue_unmap_skb(rt2x00dev, skb); - dev_kfree_skb_any(skb); + rt2x00queue_unmap_skb(entry); + dev_kfree_skb_any(entry->skb); + entry->skb = NULL; } void rt2x00queue_align_frame(struct sk_buff *skb) @@ -162,92 +158,89 @@ void rt2x00queue_align_frame(struct sk_buff *skb) skb_trim(skb, frame_length); } -void rt2x00queue_align_payload(struct sk_buff *skb, unsigned int header_length) -{ - unsigned int frame_length = skb->len; - unsigned int align = ALIGN_SIZE(skb, header_length); - - if (!align) - return; - - skb_push(skb, align); - memmove(skb->data, skb->data + align, frame_length); - skb_trim(skb, frame_length); -} - void rt2x00queue_insert_l2pad(struct sk_buff *skb, unsigned int header_length) { - struct skb_frame_desc *skbdesc = get_skb_frame_desc(skb); - unsigned int frame_length = skb->len; + unsigned int payload_length = skb->len - header_length; unsigned int header_align = ALIGN_SIZE(skb, 0); unsigned int payload_align = ALIGN_SIZE(skb, header_length); - unsigned int l2pad = 4 - (payload_align - header_align); + unsigned int l2pad = payload_length ? L2PAD_SIZE(header_length) : 0; - if (header_align == payload_align) { - /* - * Both header and payload must be moved the same - * amount of bytes to align them properly. This means - * we don't use the L2 padding but just move the entire - * frame. - */ - rt2x00queue_align_frame(skb); - } else if (!payload_align) { - /* - * Simple L2 padding, only the header needs to be moved, - * the payload is already properly aligned. - */ - skb_push(skb, header_align); - memmove(skb->data, skb->data + header_align, frame_length); - skbdesc->flags |= SKBDESC_L2_PADDED; - } else { - /* - * - * Complicated L2 padding, both header and payload need - * to be moved. By default we only move to the start - * of the buffer, so our header alignment needs to be - * increased if there is not enough room for the header - * to be moved. - */ - if (payload_align > header_align) - header_align += 4; + /* + * Adjust the header alignment if the payload needs to be moved more + * than the header. + */ + if (payload_align > header_align) + header_align += 4; + + /* There is nothing to do if no alignment is needed */ + if (!header_align) + return; - skb_push(skb, header_align); - memmove(skb->data, skb->data + header_align, header_length); + /* Reserve the amount of space needed in front of the frame */ + skb_push(skb, header_align); + + /* + * Move the header. + */ + memmove(skb->data, skb->data + header_align, header_length); + + /* Move the payload, if present and if required */ + if (payload_length && payload_align) memmove(skb->data + header_length + l2pad, skb->data + header_length + l2pad + payload_align, - frame_length - header_length); - skbdesc->flags |= SKBDESC_L2_PADDED; - } + payload_length); + + /* Trim the skb to the correct size */ + skb_trim(skb, header_length + l2pad + payload_length); } void rt2x00queue_remove_l2pad(struct sk_buff *skb, unsigned int header_length) { - struct skb_frame_desc *skbdesc = get_skb_frame_desc(skb); - unsigned int l2pad = 4 - (header_length & 3); + /* + * L2 padding is only present if the skb contains more than just the + * IEEE 802.11 header. + */ + unsigned int l2pad = (skb->len > header_length) ? + L2PAD_SIZE(header_length) : 0; - if (!l2pad || (skbdesc->flags & SKBDESC_L2_PADDED)) + if (!l2pad) return; memmove(skb->data + l2pad, skb->data, header_length); skb_pull(skb, l2pad); } -static void rt2x00queue_create_tx_descriptor_seq(struct queue_entry *entry, +static void rt2x00queue_create_tx_descriptor_seq(struct rt2x00_dev *rt2x00dev, + struct sk_buff *skb, struct txentry_desc *txdesc) { - struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(entry->skb); - struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)entry->skb->data; + struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); + struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; struct rt2x00_intf *intf = vif_to_intf(tx_info->control.vif); - unsigned long irqflags; + u16 seqno; - if (!(tx_info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) || - unlikely(!tx_info->control.vif)) + if (!(tx_info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)) return; + __set_bit(ENTRY_TXD_GENERATE_SEQ, &txdesc->flags); + + if (!test_bit(REQUIRE_SW_SEQNO, &rt2x00dev->cap_flags)) { + /* + * rt2800 has a H/W (or F/W) bug, device incorrectly increase + * seqno on retransmited data (non-QOS) frames. To workaround + * the problem let's generate seqno in software if QOS is + * disabled. + */ + if (test_bit(CONFIG_QOS_DISABLED, &rt2x00dev->flags)) + __clear_bit(ENTRY_TXD_GENERATE_SEQ, &txdesc->flags); + else + /* H/W will generate sequence number */ + return; + } + /* - * Hardware should insert sequence counter. - * FIXME: We insert a software sequence counter first for - * hardware that doesn't support hardware sequence counting. + * The hardware is not able to insert a sequence number. Assign a + * software generated one here. * * This is wrong because beacons are not getting sequence * numbers assigned properly. @@ -256,43 +249,50 @@ static void rt2x00queue_create_tx_descriptor_seq(struct queue_entry *entry, * sequence counting per-frame, since those will override the * sequence counter given by mac80211. */ - spin_lock_irqsave(&intf->seqlock, irqflags); - if (test_bit(ENTRY_TXD_FIRST_FRAGMENT, &txdesc->flags)) - intf->seqno += 0x10; - hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); - hdr->seq_ctrl |= cpu_to_le16(intf->seqno); - - spin_unlock_irqrestore(&intf->seqlock, irqflags); + seqno = atomic_add_return(0x10, &intf->seqno); + else + seqno = atomic_read(&intf->seqno); - __set_bit(ENTRY_TXD_GENERATE_SEQ, &txdesc->flags); + hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); + hdr->seq_ctrl |= cpu_to_le16(seqno); } -static void rt2x00queue_create_tx_descriptor_plcp(struct queue_entry *entry, +static void rt2x00queue_create_tx_descriptor_plcp(struct rt2x00_dev *rt2x00dev, + struct sk_buff *skb, struct txentry_desc *txdesc, const struct rt2x00_rate *hwrate) { - struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; - struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(entry->skb); + struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); struct ieee80211_tx_rate *txrate = &tx_info->control.rates[0]; unsigned int data_length; unsigned int duration; unsigned int residual; + /* + * Determine with what IFS priority this frame should be send. + * Set ifs to IFS_SIFS when the this is not the first fragment, + * or this fragment came after RTS/CTS. + */ + if (test_bit(ENTRY_TXD_FIRST_FRAGMENT, &txdesc->flags)) + txdesc->u.plcp.ifs = IFS_BACKOFF; + else + txdesc->u.plcp.ifs = IFS_SIFS; + /* Data length + CRC + Crypto overhead (IV/EIV/ICV/MIC) */ - data_length = entry->skb->len + 4; - data_length += rt2x00crypto_tx_overhead(rt2x00dev, entry->skb); + data_length = skb->len + 4; + data_length += rt2x00crypto_tx_overhead(rt2x00dev, skb); /* * PLCP setup * Length calculation depends on OFDM/CCK rate. */ - txdesc->signal = hwrate->plcp; - txdesc->service = 0x04; + txdesc->u.plcp.signal = hwrate->plcp; + txdesc->u.plcp.service = 0x04; if (hwrate->flags & DEV_RATE_OFDM) { - txdesc->length_high = (data_length >> 6) & 0x3f; - txdesc->length_low = data_length & 0x3f; + txdesc->u.plcp.length_high = (data_length >> 6) & 0x3f; + txdesc->u.plcp.length_low = data_length & 0x3f; } else { /* * Convert length to microseconds. @@ -307,46 +307,132 @@ static void rt2x00queue_create_tx_descriptor_plcp(struct queue_entry *entry, * Check if we need to set the Length Extension */ if (hwrate->bitrate == 110 && residual <= 30) - txdesc->service |= 0x80; + txdesc->u.plcp.service |= 0x80; } - txdesc->length_high = (duration >> 8) & 0xff; - txdesc->length_low = duration & 0xff; + txdesc->u.plcp.length_high = (duration >> 8) & 0xff; + txdesc->u.plcp.length_low = duration & 0xff; /* * When preamble is enabled we should set the * preamble bit for the signal. */ if (txrate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE) - txdesc->signal |= 0x08; + txdesc->u.plcp.signal |= 0x08; } } -static void rt2x00queue_create_tx_descriptor(struct queue_entry *entry, - struct txentry_desc *txdesc) +static void rt2x00queue_create_tx_descriptor_ht(struct rt2x00_dev *rt2x00dev, + struct sk_buff *skb, + struct txentry_desc *txdesc, + struct ieee80211_sta *sta, + const struct rt2x00_rate *hwrate) { - struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; - struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(entry->skb); - struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)entry->skb->data; - struct ieee80211_rate *rate = - ieee80211_get_tx_rate(rt2x00dev->hw, tx_info); - const struct rt2x00_rate *hwrate; + struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); + struct ieee80211_tx_rate *txrate = &tx_info->control.rates[0]; + struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; + struct rt2x00_sta *sta_priv = NULL; - memset(txdesc, 0, sizeof(*txdesc)); + if (sta) { + txdesc->u.ht.mpdu_density = + sta->ht_cap.ampdu_density; + + sta_priv = sta_to_rt2x00_sta(sta); + txdesc->u.ht.wcid = sta_priv->wcid; + } + + /* + * If IEEE80211_TX_RC_MCS is set txrate->idx just contains the + * mcs rate to be used + */ + if (txrate->flags & IEEE80211_TX_RC_MCS) { + txdesc->u.ht.mcs = txrate->idx; + + /* + * MIMO PS should be set to 1 for STA's using dynamic SM PS + * when using more then one tx stream (>MCS7). + */ + if (sta && txdesc->u.ht.mcs > 7 && + sta->smps_mode == IEEE80211_SMPS_DYNAMIC) + __set_bit(ENTRY_TXD_HT_MIMO_PS, &txdesc->flags); + } else { + txdesc->u.ht.mcs = rt2x00_get_rate_mcs(hwrate->mcs); + if (txrate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE) + txdesc->u.ht.mcs |= 0x08; + } + + if (test_bit(CONFIG_HT_DISABLED, &rt2x00dev->flags)) { + if (!(tx_info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT)) + txdesc->u.ht.txop = TXOP_SIFS; + else + txdesc->u.ht.txop = TXOP_BACKOFF; + + /* Left zero on all other settings. */ + return; + } + + txdesc->u.ht.ba_size = 7; /* FIXME: What value is needed? */ + + /* + * Only one STBC stream is supported for now. + */ + if (tx_info->flags & IEEE80211_TX_CTL_STBC) + txdesc->u.ht.stbc = 1; /* - * Initialize information from queue + * This frame is eligible for an AMPDU, however, don't aggregate + * frames that are intended to probe a specific tx rate. */ - txdesc->queue = entry->queue->qid; - txdesc->cw_min = entry->queue->cw_min; - txdesc->cw_max = entry->queue->cw_max; - txdesc->aifs = entry->queue->aifs; + if (tx_info->flags & IEEE80211_TX_CTL_AMPDU && + !(tx_info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE)) + __set_bit(ENTRY_TXD_HT_AMPDU, &txdesc->flags); /* - * Header and alignment information. + * Set 40Mhz mode if necessary (for legacy rates this will + * duplicate the frame to both channels). */ - txdesc->header_length = ieee80211_get_hdrlen_from_skb(entry->skb); - txdesc->l2pad = ALIGN_SIZE(entry->skb, txdesc->header_length); + if (txrate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH || + txrate->flags & IEEE80211_TX_RC_DUP_DATA) + __set_bit(ENTRY_TXD_HT_BW_40, &txdesc->flags); + if (txrate->flags & IEEE80211_TX_RC_SHORT_GI) + __set_bit(ENTRY_TXD_HT_SHORT_GI, &txdesc->flags); + + /* + * Determine IFS values + * - Use TXOP_BACKOFF for management frames except beacons + * - Use TXOP_SIFS for fragment bursts + * - Use TXOP_HTTXOP for everything else + * + * Note: rt2800 devices won't use CTS protection (if used) + * for frames not transmitted with TXOP_HTTXOP + */ + if (ieee80211_is_mgmt(hdr->frame_control) && + !ieee80211_is_beacon(hdr->frame_control)) + txdesc->u.ht.txop = TXOP_BACKOFF; + else if (!(tx_info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT)) + txdesc->u.ht.txop = TXOP_SIFS; + else + txdesc->u.ht.txop = TXOP_HTTXOP; +} + +static void rt2x00queue_create_tx_descriptor(struct rt2x00_dev *rt2x00dev, + struct sk_buff *skb, + struct txentry_desc *txdesc, + struct ieee80211_sta *sta) +{ + struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); + struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; + struct ieee80211_tx_rate *txrate = &tx_info->control.rates[0]; + struct ieee80211_rate *rate; + const struct rt2x00_rate *hwrate = NULL; + + memset(txdesc, 0, sizeof(*txdesc)); + + /* + * Header and frame information. + */ + txdesc->length = skb->len; + txdesc->header_length = ieee80211_get_hdrlen_from_skb(skb); /* * Check whether this frame is to be acked. @@ -379,13 +465,18 @@ static void rt2x00queue_create_tx_descriptor(struct queue_entry *entry, /* * Check if more fragments are pending */ - if (ieee80211_has_morefrags(hdr->frame_control) || - (tx_info->flags & IEEE80211_TX_CTL_MORE_FRAMES)) { + if (ieee80211_has_morefrags(hdr->frame_control)) { __set_bit(ENTRY_TXD_BURST, &txdesc->flags); __set_bit(ENTRY_TXD_MORE_FRAG, &txdesc->flags); } /* + * Check if more frames (!= fragments) are pending + */ + if (tx_info->flags & IEEE80211_TX_CTL_MORE_FRAMES) + __set_bit(ENTRY_TXD_BURST, &txdesc->flags); + + /* * Beacons and probe responses require the tsf timestamp * to be inserted into the frame. */ @@ -393,94 +484,170 @@ static void rt2x00queue_create_tx_descriptor(struct queue_entry *entry, ieee80211_is_probe_resp(hdr->frame_control)) __set_bit(ENTRY_TXD_REQ_TIMESTAMP, &txdesc->flags); - /* - * Determine with what IFS priority this frame should be send. - * Set ifs to IFS_SIFS when the this is not the first fragment, - * or this fragment came after RTS/CTS. - */ if ((tx_info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT) && - !test_bit(ENTRY_TXD_RTS_FRAME, &txdesc->flags)) { + !test_bit(ENTRY_TXD_RTS_FRAME, &txdesc->flags)) __set_bit(ENTRY_TXD_FIRST_FRAGMENT, &txdesc->flags); - txdesc->ifs = IFS_BACKOFF; - } else - txdesc->ifs = IFS_SIFS; /* * Determine rate modulation. */ - hwrate = rt2x00_get_rate(rate->hw_value); - txdesc->rate_mode = RATE_MODE_CCK; - if (hwrate->flags & DEV_RATE_OFDM) - txdesc->rate_mode = RATE_MODE_OFDM; + if (txrate->flags & IEEE80211_TX_RC_GREEN_FIELD) + txdesc->rate_mode = RATE_MODE_HT_GREENFIELD; + else if (txrate->flags & IEEE80211_TX_RC_MCS) + txdesc->rate_mode = RATE_MODE_HT_MIX; + else { + rate = ieee80211_get_tx_rate(rt2x00dev->hw, tx_info); + hwrate = rt2x00_get_rate(rate->hw_value); + if (hwrate->flags & DEV_RATE_OFDM) + txdesc->rate_mode = RATE_MODE_OFDM; + else + txdesc->rate_mode = RATE_MODE_CCK; + } /* * Apply TX descriptor handling by components */ - rt2x00crypto_create_tx_descriptor(entry, txdesc); - rt2x00ht_create_tx_descriptor(entry, txdesc, hwrate); - rt2x00queue_create_tx_descriptor_seq(entry, txdesc); - rt2x00queue_create_tx_descriptor_plcp(entry, txdesc, hwrate); + rt2x00crypto_create_tx_descriptor(rt2x00dev, skb, txdesc); + rt2x00queue_create_tx_descriptor_seq(rt2x00dev, skb, txdesc); + + if (test_bit(REQUIRE_HT_TX_DESC, &rt2x00dev->cap_flags)) + rt2x00queue_create_tx_descriptor_ht(rt2x00dev, skb, txdesc, + sta, hwrate); + else + rt2x00queue_create_tx_descriptor_plcp(rt2x00dev, skb, txdesc, + hwrate); +} + +static int rt2x00queue_write_tx_data(struct queue_entry *entry, + struct txentry_desc *txdesc) +{ + struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; + + /* + * This should not happen, we already checked the entry + * was ours. When the hardware disagrees there has been + * a queue corruption! + */ + if (unlikely(rt2x00dev->ops->lib->get_entry_state && + rt2x00dev->ops->lib->get_entry_state(entry))) { + rt2x00_err(rt2x00dev, + "Corrupt queue %d, accessing entry which is not ours\n" + "Please file bug report to %s\n", + entry->queue->qid, DRV_PROJECT); + return -EINVAL; + } + + /* + * Add the requested extra tx headroom in front of the skb. + */ + skb_push(entry->skb, rt2x00dev->extra_tx_headroom); + memset(entry->skb->data, 0, rt2x00dev->extra_tx_headroom); + + /* + * Call the driver's write_tx_data function, if it exists. + */ + if (rt2x00dev->ops->lib->write_tx_data) + rt2x00dev->ops->lib->write_tx_data(entry, txdesc); + + /* + * Map the skb to DMA. + */ + if (test_bit(REQUIRE_DMA, &rt2x00dev->cap_flags) && + rt2x00queue_map_txskb(entry)) + return -ENOMEM; + + return 0; } static void rt2x00queue_write_tx_descriptor(struct queue_entry *entry, struct txentry_desc *txdesc) { struct data_queue *queue = entry->queue; - struct rt2x00_dev *rt2x00dev = queue->rt2x00dev; - rt2x00dev->ops->lib->write_tx_desc(rt2x00dev, entry->skb, txdesc); + queue->rt2x00dev->ops->lib->write_tx_desc(entry, txdesc); /* * All processing on the frame has been completed, this means * it is now ready to be dumped to userspace through debugfs. */ - rt2x00debug_dump_frame(rt2x00dev, DUMP_FRAME_TX, entry->skb); + rt2x00debug_dump_frame(queue->rt2x00dev, DUMP_FRAME_TX, entry->skb); +} +static void rt2x00queue_kick_tx_queue(struct data_queue *queue, + struct txentry_desc *txdesc) +{ /* * Check if we need to kick the queue, there are however a few rules - * 1) Don't kick beacon queue - * 2) Don't kick unless this is the last in frame in a burst. + * 1) Don't kick unless this is the last in frame in a burst. * When the burst flag is set, this frame is always followed * by another frame which in some way are related to eachother. * This is true for fragments, RTS or CTS-to-self frames. - * 3) Rule 2 can be broken when the available entries + * 2) Rule 1 can be broken when the available entries * in the queue are less then a certain threshold. */ - if (entry->queue->qid == QID_BEACON) - return; - if (rt2x00queue_threshold(queue) || !test_bit(ENTRY_TXD_BURST, &txdesc->flags)) - rt2x00dev->ops->lib->kick_tx_queue(rt2x00dev, queue->qid); + queue->rt2x00dev->ops->lib->kick_queue(queue); +} + +static void rt2x00queue_bar_check(struct queue_entry *entry) +{ + struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; + struct ieee80211_bar *bar = (void *) (entry->skb->data + + rt2x00dev->extra_tx_headroom); + struct rt2x00_bar_list_entry *bar_entry; + + if (likely(!ieee80211_is_back_req(bar->frame_control))) + return; + + bar_entry = kmalloc(sizeof(*bar_entry), GFP_ATOMIC); + + /* + * If the alloc fails we still send the BAR out but just don't track + * it in our bar list. And as a result we will report it to mac80211 + * back as failed. + */ + if (!bar_entry) + return; + + bar_entry->entry = entry; + bar_entry->block_acked = 0; + + /* + * Copy the relevant parts of the 802.11 BAR into out check list + * such that we can use RCU for less-overhead in the RX path since + * sending BARs and processing the according BlockAck should be + * the exception. + */ + memcpy(bar_entry->ra, bar->ra, sizeof(bar->ra)); + memcpy(bar_entry->ta, bar->ta, sizeof(bar->ta)); + bar_entry->control = bar->control; + bar_entry->start_seq_num = bar->start_seq_num; + + /* + * Insert BAR into our BAR check list. + */ + spin_lock_bh(&rt2x00dev->bar_list_lock); + list_add_tail_rcu(&bar_entry->list, &rt2x00dev->bar_list); + spin_unlock_bh(&rt2x00dev->bar_list_lock); } int rt2x00queue_write_tx_frame(struct data_queue *queue, struct sk_buff *skb, - bool local) + struct ieee80211_sta *sta, bool local) { struct ieee80211_tx_info *tx_info; - struct queue_entry *entry = rt2x00queue_get_entry(queue, Q_INDEX); + struct queue_entry *entry; struct txentry_desc txdesc; struct skb_frame_desc *skbdesc; u8 rate_idx, rate_flags; - - if (unlikely(rt2x00queue_full(queue))) - return -ENOBUFS; - - if (test_and_set_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags)) { - ERROR(queue->rt2x00dev, - "Arrived at non-free entry in the non-full queue %d.\n" - "Please file bug report to %s.\n", - queue->qid, DRV_PROJECT); - return -EINVAL; - } + int ret = 0; /* * Copy all TX descriptor information into txdesc, * after that we are free to use the skb->cb array * for our information. */ - entry->skb = skb; - rt2x00queue_create_tx_descriptor(entry, &txdesc); + rt2x00queue_create_tx_descriptor(queue->rt2x00dev, skb, &txdesc, sta); /* * All information is retrieved from the skb->cb array, @@ -492,7 +659,6 @@ int rt2x00queue_write_tx_frame(struct data_queue *queue, struct sk_buff *skb, rate_flags = tx_info->control.rates[0].flags; skbdesc = get_skb_frame_desc(skb); memset(skbdesc, 0, sizeof(*skbdesc)); - skbdesc->entry = entry; skbdesc->tx_rate_idx = rate_idx; skbdesc->tx_rate_flags = rate_flags; @@ -502,59 +668,88 @@ int rt2x00queue_write_tx_frame(struct data_queue *queue, struct sk_buff *skb, /* * When hardware encryption is supported, and this frame * is to be encrypted, we should strip the IV/EIV data from - * the frame so we can provide it to the driver seperately. + * the frame so we can provide it to the driver separately. */ if (test_bit(ENTRY_TXD_ENCRYPT, &txdesc.flags) && !test_bit(ENTRY_TXD_ENCRYPT_IV, &txdesc.flags)) { - if (test_bit(DRIVER_REQUIRE_COPY_IV, &queue->rt2x00dev->flags)) + if (test_bit(REQUIRE_COPY_IV, &queue->rt2x00dev->cap_flags)) rt2x00crypto_tx_copy_iv(skb, &txdesc); else rt2x00crypto_tx_remove_iv(skb, &txdesc); } /* - * When DMA allocation is required we should guarentee to the + * When DMA allocation is required we should guarantee to the * driver that the DMA is aligned to a 4-byte boundary. * However some drivers require L2 padding to pad the payload * rather then the header. This could be a requirement for * PCI and USB devices, while header alignment only is valid * for PCI devices. */ - if (test_bit(DRIVER_REQUIRE_L2PAD, &queue->rt2x00dev->flags)) - rt2x00queue_insert_l2pad(entry->skb, txdesc.header_length); - else if (test_bit(DRIVER_REQUIRE_DMA, &queue->rt2x00dev->flags)) - rt2x00queue_align_frame(entry->skb); + if (test_bit(REQUIRE_L2PAD, &queue->rt2x00dev->cap_flags)) + rt2x00queue_insert_l2pad(skb, txdesc.header_length); + else if (test_bit(REQUIRE_DMA, &queue->rt2x00dev->cap_flags)) + rt2x00queue_align_frame(skb); + + /* + * That function must be called with bh disabled. + */ + spin_lock(&queue->tx_lock); + + if (unlikely(rt2x00queue_full(queue))) { + rt2x00_err(queue->rt2x00dev, "Dropping frame due to full tx queue %d\n", + queue->qid); + ret = -ENOBUFS; + goto out; + } + + entry = rt2x00queue_get_entry(queue, Q_INDEX); + + if (unlikely(test_and_set_bit(ENTRY_OWNER_DEVICE_DATA, + &entry->flags))) { + rt2x00_err(queue->rt2x00dev, + "Arrived at non-free entry in the non-full queue %d\n" + "Please file bug report to %s\n", + queue->qid, DRV_PROJECT); + ret = -EINVAL; + goto out; + } + + skbdesc->entry = entry; + entry->skb = skb; /* * It could be possible that the queue was corrupted and this * call failed. Since we always return NETDEV_TX_OK to mac80211, * this frame will simply be dropped. */ - if (unlikely(queue->rt2x00dev->ops->lib->write_tx_data(entry))) { + if (unlikely(rt2x00queue_write_tx_data(entry, &txdesc))) { clear_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags); entry->skb = NULL; - return -EIO; + ret = -EIO; + goto out; } - if (test_bit(DRIVER_REQUIRE_DMA, &queue->rt2x00dev->flags)) - rt2x00queue_map_txskb(queue->rt2x00dev, skb); + /* + * Put BlockAckReqs into our check list for driver BA processing. + */ + rt2x00queue_bar_check(entry); set_bit(ENTRY_DATA_PENDING, &entry->flags); - rt2x00queue_index_inc(queue, Q_INDEX); + rt2x00queue_index_inc(entry, Q_INDEX); rt2x00queue_write_tx_descriptor(entry, &txdesc); + rt2x00queue_kick_tx_queue(queue, &txdesc); - return 0; +out: + spin_unlock(&queue->tx_lock); + return ret; } -int rt2x00queue_update_beacon(struct rt2x00_dev *rt2x00dev, - struct ieee80211_vif *vif, - const bool enable_beacon) +int rt2x00queue_clear_beacon(struct rt2x00_dev *rt2x00dev, + struct ieee80211_vif *vif) { struct rt2x00_intf *intf = vif_to_intf(vif); - struct skb_frame_desc *skbdesc; - struct txentry_desc txdesc; - __le32 desc[16]; if (unlikely(!intf->beacon)) return -ENOBUFS; @@ -564,84 +759,129 @@ int rt2x00queue_update_beacon(struct rt2x00_dev *rt2x00dev, /* * Clean up the beacon skb. */ - rt2x00queue_free_skb(rt2x00dev, intf->beacon->skb); - intf->beacon->skb = NULL; + rt2x00queue_free_skb(intf->beacon); - if (!enable_beacon) { - rt2x00dev->ops->lib->kill_tx_queue(rt2x00dev, QID_BEACON); - mutex_unlock(&intf->beacon_skb_mutex); - return 0; - } + /* + * Clear beacon (single bssid devices don't need to clear the beacon + * since the beacon queue will get stopped anyway). + */ + if (rt2x00dev->ops->lib->clear_beacon) + rt2x00dev->ops->lib->clear_beacon(intf->beacon); + + mutex_unlock(&intf->beacon_skb_mutex); + + return 0; +} + +int rt2x00queue_update_beacon_locked(struct rt2x00_dev *rt2x00dev, + struct ieee80211_vif *vif) +{ + struct rt2x00_intf *intf = vif_to_intf(vif); + struct skb_frame_desc *skbdesc; + struct txentry_desc txdesc; + + if (unlikely(!intf->beacon)) + return -ENOBUFS; + + /* + * Clean up the beacon skb. + */ + rt2x00queue_free_skb(intf->beacon); intf->beacon->skb = ieee80211_beacon_get(rt2x00dev->hw, vif); - if (!intf->beacon->skb) { - mutex_unlock(&intf->beacon_skb_mutex); + if (!intf->beacon->skb) return -ENOMEM; - } /* * Copy all TX descriptor information into txdesc, * after that we are free to use the skb->cb array * for our information. */ - rt2x00queue_create_tx_descriptor(intf->beacon, &txdesc); - - /* - * For the descriptor we use a local array from where the - * driver can move it to the correct location required for - * the hardware. - */ - memset(desc, 0, sizeof(desc)); + rt2x00queue_create_tx_descriptor(rt2x00dev, intf->beacon->skb, &txdesc, NULL); /* * Fill in skb descriptor */ skbdesc = get_skb_frame_desc(intf->beacon->skb); memset(skbdesc, 0, sizeof(*skbdesc)); - skbdesc->desc = desc; - skbdesc->desc_len = intf->beacon->queue->desc_size; skbdesc->entry = intf->beacon; /* - * Write TX descriptor into reserved room in front of the beacon. - */ - rt2x00queue_write_tx_descriptor(intf->beacon, &txdesc); - - /* * Send beacon to hardware. - * Also enable beacon generation, which might have been disabled - * by the driver during the config_beacon() callback function. */ - rt2x00dev->ops->lib->write_beacon(intf->beacon); - rt2x00dev->ops->lib->kick_tx_queue(rt2x00dev, QID_BEACON); + rt2x00dev->ops->lib->write_beacon(intf->beacon, &txdesc); + + return 0; +} + +int rt2x00queue_update_beacon(struct rt2x00_dev *rt2x00dev, + struct ieee80211_vif *vif) +{ + struct rt2x00_intf *intf = vif_to_intf(vif); + int ret; + + mutex_lock(&intf->beacon_skb_mutex); + ret = rt2x00queue_update_beacon_locked(rt2x00dev, vif); mutex_unlock(&intf->beacon_skb_mutex); - return 0; + return ret; } -struct data_queue *rt2x00queue_get_queue(struct rt2x00_dev *rt2x00dev, - const enum data_queue_qid queue) +bool rt2x00queue_for_each_entry(struct data_queue *queue, + enum queue_index start, + enum queue_index end, + void *data, + bool (*fn)(struct queue_entry *entry, + void *data)) { - int atim = test_bit(DRIVER_REQUIRE_ATIM_QUEUE, &rt2x00dev->flags); + unsigned long irqflags; + unsigned int index_start; + unsigned int index_end; + unsigned int i; - if (queue == QID_RX) - return rt2x00dev->rx; + if (unlikely(start >= Q_INDEX_MAX || end >= Q_INDEX_MAX)) { + rt2x00_err(queue->rt2x00dev, + "Entry requested from invalid index range (%d - %d)\n", + start, end); + return true; + } - if (queue < rt2x00dev->ops->tx_queues && rt2x00dev->tx) - return &rt2x00dev->tx[queue]; + /* + * Only protect the range we are going to loop over, + * if during our loop a extra entry is set to pending + * it should not be kicked during this run, since it + * is part of another TX operation. + */ + spin_lock_irqsave(&queue->index_lock, irqflags); + index_start = queue->index[start]; + index_end = queue->index[end]; + spin_unlock_irqrestore(&queue->index_lock, irqflags); - if (!rt2x00dev->bcn) - return NULL; + /* + * Start from the TX done pointer, this guarantees that we will + * send out all frames in the correct order. + */ + if (index_start < index_end) { + for (i = index_start; i < index_end; i++) { + if (fn(&queue->entries[i], data)) + return true; + } + } else { + for (i = index_start; i < queue->limit; i++) { + if (fn(&queue->entries[i], data)) + return true; + } - if (queue == QID_BEACON) - return &rt2x00dev->bcn[0]; - else if (queue == QID_ATIM && atim) - return &rt2x00dev->bcn[1]; + for (i = 0; i < index_end; i++) { + if (fn(&queue->entries[i], data)) + return true; + } + } - return NULL; + return false; } -EXPORT_SYMBOL_GPL(rt2x00queue_get_queue); +EXPORT_SYMBOL_GPL(rt2x00queue_for_each_entry); struct queue_entry *rt2x00queue_get_entry(struct data_queue *queue, enum queue_index index) @@ -650,37 +890,40 @@ struct queue_entry *rt2x00queue_get_entry(struct data_queue *queue, unsigned long irqflags; if (unlikely(index >= Q_INDEX_MAX)) { - ERROR(queue->rt2x00dev, - "Entry requested from invalid index type (%d)\n", index); + rt2x00_err(queue->rt2x00dev, "Entry requested from invalid index type (%d)\n", + index); return NULL; } - spin_lock_irqsave(&queue->lock, irqflags); + spin_lock_irqsave(&queue->index_lock, irqflags); entry = &queue->entries[queue->index[index]]; - spin_unlock_irqrestore(&queue->lock, irqflags); + spin_unlock_irqrestore(&queue->index_lock, irqflags); return entry; } EXPORT_SYMBOL_GPL(rt2x00queue_get_entry); -void rt2x00queue_index_inc(struct data_queue *queue, enum queue_index index) +void rt2x00queue_index_inc(struct queue_entry *entry, enum queue_index index) { + struct data_queue *queue = entry->queue; unsigned long irqflags; if (unlikely(index >= Q_INDEX_MAX)) { - ERROR(queue->rt2x00dev, - "Index change on invalid index type (%d)\n", index); + rt2x00_err(queue->rt2x00dev, + "Index change on invalid index type (%d)\n", index); return; } - spin_lock_irqsave(&queue->lock, irqflags); + spin_lock_irqsave(&queue->index_lock, irqflags); queue->index[index]++; if (queue->index[index] >= queue->limit) queue->index[index] = 0; + entry->last_action = jiffies; + if (index == Q_INDEX) { queue->length++; } else if (index == Q_INDEX_DONE) { @@ -688,28 +931,198 @@ void rt2x00queue_index_inc(struct data_queue *queue, enum queue_index index) queue->count++; } - spin_unlock_irqrestore(&queue->lock, irqflags); + spin_unlock_irqrestore(&queue->index_lock, irqflags); } -static void rt2x00queue_reset(struct data_queue *queue) +static void rt2x00queue_pause_queue_nocheck(struct data_queue *queue) { - unsigned long irqflags; + switch (queue->qid) { + case QID_AC_VO: + case QID_AC_VI: + case QID_AC_BE: + case QID_AC_BK: + /* + * For TX queues, we have to disable the queue + * inside mac80211. + */ + ieee80211_stop_queue(queue->rt2x00dev->hw, queue->qid); + break; + default: + break; + } +} +void rt2x00queue_pause_queue(struct data_queue *queue) +{ + if (!test_bit(DEVICE_STATE_PRESENT, &queue->rt2x00dev->flags) || + !test_bit(QUEUE_STARTED, &queue->flags) || + test_and_set_bit(QUEUE_PAUSED, &queue->flags)) + return; - spin_lock_irqsave(&queue->lock, irqflags); + rt2x00queue_pause_queue_nocheck(queue); +} +EXPORT_SYMBOL_GPL(rt2x00queue_pause_queue); - queue->count = 0; - queue->length = 0; - memset(queue->index, 0, sizeof(queue->index)); +void rt2x00queue_unpause_queue(struct data_queue *queue) +{ + if (!test_bit(DEVICE_STATE_PRESENT, &queue->rt2x00dev->flags) || + !test_bit(QUEUE_STARTED, &queue->flags) || + !test_and_clear_bit(QUEUE_PAUSED, &queue->flags)) + return; + + switch (queue->qid) { + case QID_AC_VO: + case QID_AC_VI: + case QID_AC_BE: + case QID_AC_BK: + /* + * For TX queues, we have to enable the queue + * inside mac80211. + */ + ieee80211_wake_queue(queue->rt2x00dev->hw, queue->qid); + break; + case QID_RX: + /* + * For RX we need to kick the queue now in order to + * receive frames. + */ + queue->rt2x00dev->ops->lib->kick_queue(queue); + default: + break; + } +} +EXPORT_SYMBOL_GPL(rt2x00queue_unpause_queue); + +void rt2x00queue_start_queue(struct data_queue *queue) +{ + mutex_lock(&queue->status_lock); + + if (!test_bit(DEVICE_STATE_PRESENT, &queue->rt2x00dev->flags) || + test_and_set_bit(QUEUE_STARTED, &queue->flags)) { + mutex_unlock(&queue->status_lock); + return; + } + + set_bit(QUEUE_PAUSED, &queue->flags); + + queue->rt2x00dev->ops->lib->start_queue(queue); + + rt2x00queue_unpause_queue(queue); - spin_unlock_irqrestore(&queue->lock, irqflags); + mutex_unlock(&queue->status_lock); } +EXPORT_SYMBOL_GPL(rt2x00queue_start_queue); + +void rt2x00queue_stop_queue(struct data_queue *queue) +{ + mutex_lock(&queue->status_lock); + + if (!test_and_clear_bit(QUEUE_STARTED, &queue->flags)) { + mutex_unlock(&queue->status_lock); + return; + } + + rt2x00queue_pause_queue_nocheck(queue); + + queue->rt2x00dev->ops->lib->stop_queue(queue); + + mutex_unlock(&queue->status_lock); +} +EXPORT_SYMBOL_GPL(rt2x00queue_stop_queue); + +void rt2x00queue_flush_queue(struct data_queue *queue, bool drop) +{ + bool tx_queue = + (queue->qid == QID_AC_VO) || + (queue->qid == QID_AC_VI) || + (queue->qid == QID_AC_BE) || + (queue->qid == QID_AC_BK); + + + /* + * If we are not supposed to drop any pending + * frames, this means we must force a start (=kick) + * to the queue to make sure the hardware will + * start transmitting. + */ + if (!drop && tx_queue) + queue->rt2x00dev->ops->lib->kick_queue(queue); + + /* + * Check if driver supports flushing, if that is the case we can + * defer the flushing to the driver. Otherwise we must use the + * alternative which just waits for the queue to become empty. + */ + if (likely(queue->rt2x00dev->ops->lib->flush_queue)) + queue->rt2x00dev->ops->lib->flush_queue(queue, drop); + + /* + * The queue flush has failed... + */ + if (unlikely(!rt2x00queue_empty(queue))) + rt2x00_warn(queue->rt2x00dev, "Queue %d failed to flush\n", + queue->qid); +} +EXPORT_SYMBOL_GPL(rt2x00queue_flush_queue); + +void rt2x00queue_start_queues(struct rt2x00_dev *rt2x00dev) +{ + struct data_queue *queue; + + /* + * rt2x00queue_start_queue will call ieee80211_wake_queue + * for each queue after is has been properly initialized. + */ + tx_queue_for_each(rt2x00dev, queue) + rt2x00queue_start_queue(queue); + + rt2x00queue_start_queue(rt2x00dev->rx); +} +EXPORT_SYMBOL_GPL(rt2x00queue_start_queues); void rt2x00queue_stop_queues(struct rt2x00_dev *rt2x00dev) { struct data_queue *queue; - txall_queue_for_each(rt2x00dev, queue) - rt2x00dev->ops->lib->kill_tx_queue(rt2x00dev, queue->qid); + /* + * rt2x00queue_stop_queue will call ieee80211_stop_queue + * as well, but we are completely shutting doing everything + * now, so it is much safer to stop all TX queues at once, + * and use rt2x00queue_stop_queue for cleaning up. + */ + ieee80211_stop_queues(rt2x00dev->hw); + + tx_queue_for_each(rt2x00dev, queue) + rt2x00queue_stop_queue(queue); + + rt2x00queue_stop_queue(rt2x00dev->rx); +} +EXPORT_SYMBOL_GPL(rt2x00queue_stop_queues); + +void rt2x00queue_flush_queues(struct rt2x00_dev *rt2x00dev, bool drop) +{ + struct data_queue *queue; + + tx_queue_for_each(rt2x00dev, queue) + rt2x00queue_flush_queue(queue, drop); + + rt2x00queue_flush_queue(rt2x00dev->rx, drop); +} +EXPORT_SYMBOL_GPL(rt2x00queue_flush_queues); + +static void rt2x00queue_reset(struct data_queue *queue) +{ + unsigned long irqflags; + unsigned int i; + + spin_lock_irqsave(&queue->index_lock, irqflags); + + queue->count = 0; + queue->length = 0; + + for (i = 0; i < Q_INDEX_MAX; i++) + queue->index[i] = 0; + + spin_unlock_irqrestore(&queue->index_lock, irqflags); } void rt2x00queue_init_queues(struct rt2x00_dev *rt2x00dev) @@ -720,16 +1133,12 @@ void rt2x00queue_init_queues(struct rt2x00_dev *rt2x00dev) queue_for_each(rt2x00dev, queue) { rt2x00queue_reset(queue); - for (i = 0; i < queue->limit; i++) { - queue->entries[i].flags = 0; - + for (i = 0; i < queue->limit; i++) rt2x00dev->ops->lib->clear_entry(&queue->entries[i]); - } } } -static int rt2x00queue_alloc_entries(struct data_queue *queue, - const struct data_queue_desc *qdesc) +static int rt2x00queue_alloc_entries(struct data_queue *queue) { struct queue_entry *entries; unsigned int entry_size; @@ -737,22 +1146,17 @@ static int rt2x00queue_alloc_entries(struct data_queue *queue, rt2x00queue_reset(queue); - queue->limit = qdesc->entry_num; - queue->threshold = DIV_ROUND_UP(qdesc->entry_num, 10); - queue->data_size = qdesc->data_size; - queue->desc_size = qdesc->desc_size; - /* * Allocate all queue entries. */ - entry_size = sizeof(*entries) + qdesc->priv_size; - entries = kzalloc(queue->limit * entry_size, GFP_KERNEL); + entry_size = sizeof(*entries) + queue->priv_size; + entries = kcalloc(queue->limit, entry_size, GFP_KERNEL); if (!entries) return -ENOMEM; #define QUEUE_ENTRY_PRIV_OFFSET(__base, __index, __limit, __esize, __psize) \ - ( ((char *)(__base)) + ((__limit) * (__esize)) + \ - ((__index) * (__psize)) ) + (((char *)(__base)) + ((__limit) * (__esize)) + \ + ((__index) * (__psize))) for (i = 0; i < queue->limit; i++) { entries[i].flags = 0; @@ -761,7 +1165,7 @@ static int rt2x00queue_alloc_entries(struct data_queue *queue, entries[i].entry_idx = i; entries[i].priv_data = QUEUE_ENTRY_PRIV_OFFSET(entries, i, queue->limit, - sizeof(*entries), qdesc->priv_size); + sizeof(*entries), queue->priv_size); } #undef QUEUE_ENTRY_PRIV_OFFSET @@ -771,8 +1175,7 @@ static int rt2x00queue_alloc_entries(struct data_queue *queue, return 0; } -static void rt2x00queue_free_skbs(struct rt2x00_dev *rt2x00dev, - struct data_queue *queue) +static void rt2x00queue_free_skbs(struct data_queue *queue) { unsigned int i; @@ -780,19 +1183,17 @@ static void rt2x00queue_free_skbs(struct rt2x00_dev *rt2x00dev, return; for (i = 0; i < queue->limit; i++) { - if (queue->entries[i].skb) - rt2x00queue_free_skb(rt2x00dev, queue->entries[i].skb); + rt2x00queue_free_skb(&queue->entries[i]); } } -static int rt2x00queue_alloc_rxskbs(struct rt2x00_dev *rt2x00dev, - struct data_queue *queue) +static int rt2x00queue_alloc_rxskbs(struct data_queue *queue) { unsigned int i; struct sk_buff *skb; for (i = 0; i < queue->limit; i++) { - skb = rt2x00queue_alloc_rxskb(rt2x00dev, &queue->entries[i]); + skb = rt2x00queue_alloc_rxskb(&queue->entries[i], GFP_KERNEL); if (!skb) return -ENOMEM; queue->entries[i].skb = skb; @@ -806,35 +1207,34 @@ int rt2x00queue_initialize(struct rt2x00_dev *rt2x00dev) struct data_queue *queue; int status; - status = rt2x00queue_alloc_entries(rt2x00dev->rx, rt2x00dev->ops->rx); + status = rt2x00queue_alloc_entries(rt2x00dev->rx); if (status) goto exit; tx_queue_for_each(rt2x00dev, queue) { - status = rt2x00queue_alloc_entries(queue, rt2x00dev->ops->tx); + status = rt2x00queue_alloc_entries(queue); if (status) goto exit; } - status = rt2x00queue_alloc_entries(rt2x00dev->bcn, rt2x00dev->ops->bcn); + status = rt2x00queue_alloc_entries(rt2x00dev->bcn); if (status) goto exit; - if (test_bit(DRIVER_REQUIRE_ATIM_QUEUE, &rt2x00dev->flags)) { - status = rt2x00queue_alloc_entries(&rt2x00dev->bcn[1], - rt2x00dev->ops->atim); + if (test_bit(REQUIRE_ATIM_QUEUE, &rt2x00dev->cap_flags)) { + status = rt2x00queue_alloc_entries(rt2x00dev->atim); if (status) goto exit; } - status = rt2x00queue_alloc_rxskbs(rt2x00dev, rt2x00dev->rx); + status = rt2x00queue_alloc_rxskbs(rt2x00dev->rx); if (status) goto exit; return 0; exit: - ERROR(rt2x00dev, "Queue entries allocation failed.\n"); + rt2x00_err(rt2x00dev, "Queue entries allocation failed\n"); rt2x00queue_uninitialize(rt2x00dev); @@ -845,7 +1245,7 @@ void rt2x00queue_uninitialize(struct rt2x00_dev *rt2x00dev) { struct data_queue *queue; - rt2x00queue_free_skbs(rt2x00dev, rt2x00dev->rx); + rt2x00queue_free_skbs(rt2x00dev->rx); queue_for_each(rt2x00dev, queue) { kfree(queue->entries); @@ -856,7 +1256,9 @@ void rt2x00queue_uninitialize(struct rt2x00_dev *rt2x00dev) static void rt2x00queue_init(struct rt2x00_dev *rt2x00dev, struct data_queue *queue, enum data_queue_qid qid) { - spin_lock_init(&queue->lock); + mutex_init(&queue->status_lock); + spin_lock_init(&queue->tx_lock); + spin_lock_init(&queue->index_lock); queue->rt2x00dev = rt2x00dev; queue->qid = qid; @@ -864,6 +1266,10 @@ static void rt2x00queue_init(struct rt2x00_dev *rt2x00dev, queue->aifs = 2; queue->cw_min = 5; queue->cw_max = 10; + + rt2x00dev->ops->queue_init(queue); + + queue->threshold = DIV_ROUND_UP(queue->limit, 10); } int rt2x00queue_allocate(struct rt2x00_dev *rt2x00dev) @@ -871,7 +1277,7 @@ int rt2x00queue_allocate(struct rt2x00_dev *rt2x00dev) struct data_queue *queue; enum data_queue_qid qid; unsigned int req_atim = - !!test_bit(DRIVER_REQUIRE_ATIM_QUEUE, &rt2x00dev->flags); + !!test_bit(REQUIRE_ATIM_QUEUE, &rt2x00dev->cap_flags); /* * We need the following queues: @@ -882,9 +1288,9 @@ int rt2x00queue_allocate(struct rt2x00_dev *rt2x00dev) */ rt2x00dev->data_queues = 2 + rt2x00dev->ops->tx_queues + req_atim; - queue = kzalloc(rt2x00dev->data_queues * sizeof(*queue), GFP_KERNEL); + queue = kcalloc(rt2x00dev->data_queues, sizeof(*queue), GFP_KERNEL); if (!queue) { - ERROR(rt2x00dev, "Queue allocation failed.\n"); + rt2x00_err(rt2x00dev, "Queue allocation failed\n"); return -ENOMEM; } @@ -894,11 +1300,12 @@ int rt2x00queue_allocate(struct rt2x00_dev *rt2x00dev) rt2x00dev->rx = queue; rt2x00dev->tx = &queue[1]; rt2x00dev->bcn = &queue[1 + rt2x00dev->ops->tx_queues]; + rt2x00dev->atim = req_atim ? &queue[2 + rt2x00dev->ops->tx_queues] : NULL; /* * Initialize queue parameters. * RX: qid = QID_RX - * TX: qid = QID_AC_BE + index + * TX: qid = QID_AC_VO + index * TX: cw_min: 2^5 = 32. * TX: cw_max: 2^10 = 1024. * BCN: qid = QID_BEACON @@ -906,13 +1313,13 @@ int rt2x00queue_allocate(struct rt2x00_dev *rt2x00dev) */ rt2x00queue_init(rt2x00dev, rt2x00dev->rx, QID_RX); - qid = QID_AC_BE; + qid = QID_AC_VO; tx_queue_for_each(rt2x00dev, queue) rt2x00queue_init(rt2x00dev, queue, qid++); - rt2x00queue_init(rt2x00dev, &rt2x00dev->bcn[0], QID_BEACON); + rt2x00queue_init(rt2x00dev, rt2x00dev->bcn, QID_BEACON); if (req_atim) - rt2x00queue_init(rt2x00dev, &rt2x00dev->bcn[1], QID_ATIM); + rt2x00queue_init(rt2x00dev, rt2x00dev->atim, QID_ATIM); return 0; } |