diff options
Diffstat (limited to 'drivers/net/wireless/rt2x00')
| -rw-r--r-- | drivers/net/wireless/rt2x00/rt2400pci.c | 13 | ||||
| -rw-r--r-- | drivers/net/wireless/rt2x00/rt2500pci.c | 10 | ||||
| -rw-r--r-- | drivers/net/wireless/rt2x00/rt2x00.h | 28 | ||||
| -rw-r--r-- | drivers/net/wireless/rt2x00/rt2x00dev.c | 64 | ||||
| -rw-r--r-- | drivers/net/wireless/rt2x00/rt2x00pci.c | 125 | ||||
| -rw-r--r-- | drivers/net/wireless/rt2x00/rt2x00pci.h | 3 | ||||
| -rw-r--r-- | drivers/net/wireless/rt2x00/rt2x00queue.c | 85 | ||||
| -rw-r--r-- | drivers/net/wireless/rt2x00/rt2x00queue.h | 16 | ||||
| -rw-r--r-- | drivers/net/wireless/rt2x00/rt2x00usb.c | 27 | ||||
| -rw-r--r-- | drivers/net/wireless/rt2x00/rt61pci.c | 9 |
10 files changed, 204 insertions, 176 deletions
diff --git a/drivers/net/wireless/rt2x00/rt2400pci.c b/drivers/net/wireless/rt2x00/rt2400pci.c index 76ec1514fa4..de2dd336f23 100644 --- a/drivers/net/wireless/rt2x00/rt2400pci.c +++ b/drivers/net/wireless/rt2x00/rt2400pci.c @@ -632,15 +632,15 @@ static void rt2400pci_init_rxentry(struct rt2x00_dev *rt2x00dev, struct queue_entry *entry) { struct queue_entry_priv_pci *entry_priv = entry->priv_data; + struct skb_frame_desc *skbdesc = get_skb_frame_desc(entry->skb); u32 word; rt2x00_desc_read(entry_priv->desc, 2, &word); - rt2x00_set_field32(&word, RXD_W2_BUFFER_LENGTH, - entry->queue->data_size); + rt2x00_set_field32(&word, RXD_W2_BUFFER_LENGTH, entry->skb->len); rt2x00_desc_write(entry_priv->desc, 2, word); rt2x00_desc_read(entry_priv->desc, 1, &word); - rt2x00_set_field32(&word, RXD_W1_BUFFER_ADDRESS, entry_priv->data_dma); + rt2x00_set_field32(&word, RXD_W1_BUFFER_ADDRESS, skbdesc->skb_dma); rt2x00_desc_write(entry_priv->desc, 1, word); rt2x00_desc_read(entry_priv->desc, 0, &word); @@ -1012,7 +1012,7 @@ static void rt2400pci_write_tx_desc(struct rt2x00_dev *rt2x00dev, * Start writing the descriptor words. */ rt2x00_desc_read(entry_priv->desc, 1, &word); - rt2x00_set_field32(&word, TXD_W1_BUFFER_ADDRESS, entry_priv->data_dma); + rt2x00_set_field32(&word, TXD_W1_BUFFER_ADDRESS, skbdesc->skb_dma); rt2x00_desc_write(entry_priv->desc, 1, word); rt2x00_desc_read(txd, 2, &word); @@ -1412,9 +1412,10 @@ static int rt2400pci_probe_hw(struct rt2x00_dev *rt2x00dev) rt2400pci_probe_hw_mode(rt2x00dev); /* - * This device requires the atim queue + * This device requires the atim queue and DMA-mapped skbs. */ __set_bit(DRIVER_REQUIRE_ATIM_QUEUE, &rt2x00dev->flags); + __set_bit(DRIVER_REQUIRE_DMA, &rt2x00dev->flags); /* * Set the rssi offset. @@ -1526,7 +1527,7 @@ static int rt2400pci_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb) * Write entire beacon with descriptor to register, * and kick the beacon generator. */ - memcpy(entry_priv->data, skb->data, skb->len); + rt2x00queue_map_txskb(rt2x00dev, intf->beacon->skb); rt2x00queue_write_tx_descriptor(intf->beacon, &txdesc); rt2x00dev->ops->lib->kick_tx_queue(rt2x00dev, QID_BEACON); diff --git a/drivers/net/wireless/rt2x00/rt2500pci.c b/drivers/net/wireless/rt2x00/rt2500pci.c index 5f0117f9a88..5077b62dcc5 100644 --- a/drivers/net/wireless/rt2x00/rt2500pci.c +++ b/drivers/net/wireless/rt2x00/rt2500pci.c @@ -727,10 +727,11 @@ static void rt2500pci_init_rxentry(struct rt2x00_dev *rt2x00dev, struct queue_entry *entry) { struct queue_entry_priv_pci *entry_priv = entry->priv_data; + struct skb_frame_desc *skbdesc = get_skb_frame_desc(entry->skb); u32 word; rt2x00_desc_read(entry_priv->desc, 1, &word); - rt2x00_set_field32(&word, RXD_W1_BUFFER_ADDRESS, entry_priv->data_dma); + rt2x00_set_field32(&word, RXD_W1_BUFFER_ADDRESS, skbdesc->skb_dma); rt2x00_desc_write(entry_priv->desc, 1, word); rt2x00_desc_read(entry_priv->desc, 0, &word); @@ -1171,7 +1172,7 @@ static void rt2500pci_write_tx_desc(struct rt2x00_dev *rt2x00dev, * Start writing the descriptor words. */ rt2x00_desc_read(entry_priv->desc, 1, &word); - rt2x00_set_field32(&word, TXD_W1_BUFFER_ADDRESS, entry_priv->data_dma); + rt2x00_set_field32(&word, TXD_W1_BUFFER_ADDRESS, skbdesc->skb_dma); rt2x00_desc_write(entry_priv->desc, 1, word); rt2x00_desc_read(txd, 2, &word); @@ -1752,9 +1753,10 @@ static int rt2500pci_probe_hw(struct rt2x00_dev *rt2x00dev) rt2500pci_probe_hw_mode(rt2x00dev); /* - * This device requires the atim queue + * This device requires the atim queue and DMA-mapped skbs. */ __set_bit(DRIVER_REQUIRE_ATIM_QUEUE, &rt2x00dev->flags); + __set_bit(DRIVER_REQUIRE_DMA, &rt2x00dev->flags); /* * Set the rssi offset. @@ -1842,7 +1844,7 @@ static int rt2500pci_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb) * Write entire beacon with descriptor to register, * and kick the beacon generator. */ - memcpy(entry_priv->data, skb->data, skb->len); + rt2x00queue_map_txskb(rt2x00dev, intf->beacon->skb); rt2x00queue_write_tx_descriptor(intf->beacon, &txdesc); rt2x00dev->ops->lib->kick_tx_queue(rt2x00dev, QID_BEACON); diff --git a/drivers/net/wireless/rt2x00/rt2x00.h b/drivers/net/wireless/rt2x00/rt2x00.h index 08e8b0a005a..28c9026bb56 100644 --- a/drivers/net/wireless/rt2x00/rt2x00.h +++ b/drivers/net/wireless/rt2x00/rt2x00.h @@ -601,6 +601,7 @@ enum rt2x00_flags { DRIVER_REQUIRE_BEACON_GUARD, DRIVER_REQUIRE_ATIM_QUEUE, DRIVER_REQUIRE_SCHEDULED, + DRIVER_REQUIRE_DMA, /* * Driver configuration @@ -899,16 +900,33 @@ static inline u16 get_duration_res(const unsigned int size, const u8 rate) } /** - * rt2x00queue_alloc_skb - allocate a skb. + * rt2x00queue_alloc_rxskb - allocate a skb for RX purposes. + * @rt2x00dev: Pointer to &struct rt2x00_dev. * @queue: The queue for which the skb will be applicable. */ -struct sk_buff *rt2x00queue_alloc_skb(struct data_queue *queue); +struct sk_buff *rt2x00queue_alloc_rxskb(struct rt2x00_dev *rt2x00dev, + struct queue_entry *entry); + +/** + * rt2x00queue_map_txskb - Map a skb into DMA for TX purposes. + * @rt2x00dev: Pointer to &struct rt2x00_dev. + * @skb: The skb to map. + */ +void rt2x00queue_map_txskb(struct rt2x00_dev *rt2x00dev, struct sk_buff *skb); + +/** + * rt2x00queue_unmap_skb - Unmap a skb from DMA. + * @rt2x00dev: Pointer to &struct rt2x00_dev. + * @skb: The skb to unmap. + */ +void rt2x00queue_unmap_skb(struct rt2x00_dev *rt2x00dev, struct sk_buff *skb); /** * rt2x00queue_free_skb - free a skb + * @rt2x00dev: Pointer to &struct rt2x00_dev. * @skb: The skb to free. */ -void rt2x00queue_free_skb(struct sk_buff *skb); +void rt2x00queue_free_skb(struct rt2x00_dev *rt2x00dev, struct sk_buff *skb); /** * rt2x00queue_create_tx_descriptor - Create TX descriptor from mac80211 input @@ -977,8 +995,8 @@ void rt2x00queue_index_inc(struct data_queue *queue, enum queue_index index); void rt2x00lib_beacondone(struct rt2x00_dev *rt2x00dev); void rt2x00lib_txdone(struct queue_entry *entry, struct txdone_entry_desc *txdesc); -void rt2x00lib_rxdone(struct queue_entry *entry, - struct rxdone_entry_desc *rxdesc); +void rt2x00lib_rxdone(struct rt2x00_dev *rt2x00dev, + struct queue_entry *entry); /* * mac80211 handlers. diff --git a/drivers/net/wireless/rt2x00/rt2x00dev.c b/drivers/net/wireless/rt2x00/rt2x00dev.c index b8e0c4c3ed0..99b14ba99d9 100644 --- a/drivers/net/wireless/rt2x00/rt2x00dev.c +++ b/drivers/net/wireless/rt2x00/rt2x00dev.c @@ -468,6 +468,7 @@ static void rt2x00lib_intf_scheduled(struct work_struct *work) static void rt2x00lib_beacondone_iter(void *data, u8 *mac, struct ieee80211_vif *vif) { + struct rt2x00_dev *rt2x00dev = data; struct rt2x00_intf *intf = vif_to_intf(vif); if (vif->type != IEEE80211_IF_TYPE_AP && @@ -477,7 +478,7 @@ static void rt2x00lib_beacondone_iter(void *data, u8 *mac, /* * Clean up the beacon skb. */ - dev_kfree_skb_irq(intf->beacon->skb); + rt2x00queue_free_skb(rt2x00dev, intf->beacon->skb); intf->beacon->skb = NULL; spin_lock(&intf->lock); @@ -555,34 +556,55 @@ void rt2x00lib_txdone(struct queue_entry *entry, } EXPORT_SYMBOL_GPL(rt2x00lib_txdone); -void rt2x00lib_rxdone(struct queue_entry *entry, - struct rxdone_entry_desc *rxdesc) +void rt2x00lib_rxdone(struct rt2x00_dev *rt2x00dev, + struct queue_entry *entry) { - struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; + struct rxdone_entry_desc rxdesc; + struct sk_buff *skb; struct ieee80211_rx_status *rx_status = &rt2x00dev->rx_status; - unsigned int header_size = ieee80211_get_hdrlen_from_skb(entry->skb); struct ieee80211_supported_band *sband; struct ieee80211_hdr *hdr; const struct rt2x00_rate *rate; + unsigned int header_size; unsigned int align; unsigned int i; int idx = -1; /* + * Allocate a new sk_buffer. If no new buffer available, drop the + * received frame and reuse the existing buffer. + */ + skb = rt2x00queue_alloc_rxskb(rt2x00dev, entry); + if (!skb) + return; + + /* + * Unmap the skb. + */ + rt2x00queue_unmap_skb(rt2x00dev, entry->skb); + + /* + * Extract the RXD details. + */ + memset(&rxdesc, 0, sizeof(rxdesc)); + rt2x00dev->ops->lib->fill_rxdone(entry, &rxdesc); + + /* * The data behind the ieee80211 header must be * aligned on a 4 byte boundary. */ + header_size = ieee80211_get_hdrlen_from_skb(entry->skb); align = ((unsigned long)(entry->skb->data + header_size)) & 3; if (align) { skb_push(entry->skb, align); /* Move entire frame in 1 command */ memmove(entry->skb->data, entry->skb->data + align, - rxdesc->size); + rxdesc.size); } /* Update data pointers, trim buffer to correct size */ - skb_trim(entry->skb, rxdesc->size); + skb_trim(entry->skb, rxdesc.size); /* * Update RX statistics. @@ -591,10 +613,10 @@ void rt2x00lib_rxdone(struct queue_entry *entry, for (i = 0; i < sband->n_bitrates; i++) { rate = rt2x00_get_rate(sband->bitrates[i].hw_value); - if (((rxdesc->dev_flags & RXDONE_SIGNAL_PLCP) && - (rate->plcp == rxdesc->signal)) || - (!(rxdesc->dev_flags & RXDONE_SIGNAL_PLCP) && - (rate->bitrate == rxdesc->signal))) { + if (((rxdesc.dev_flags & RXDONE_SIGNAL_PLCP) && + (rate->plcp == rxdesc.signal)) || + (!(rxdesc.dev_flags & RXDONE_SIGNAL_PLCP) && + (rate->bitrate == rxdesc.signal))) { idx = i; break; } @@ -602,8 +624,8 @@ void rt2x00lib_rxdone(struct queue_entry *entry, if (idx < 0) { WARNING(rt2x00dev, "Frame received with unrecognized signal," - "signal=0x%.2x, plcp=%d.\n", rxdesc->signal, - !!(rxdesc->dev_flags & RXDONE_SIGNAL_PLCP)); + "signal=0x%.2x, plcp=%d.\n", rxdesc.signal, + !!(rxdesc.dev_flags & RXDONE_SIGNAL_PLCP)); idx = 0; } @@ -612,16 +634,16 @@ void rt2x00lib_rxdone(struct queue_entry *entry, */ hdr = (struct ieee80211_hdr *)entry->skb->data; if (ieee80211_is_beacon(hdr->frame_control) && - (rxdesc->dev_flags & RXDONE_MY_BSS)) - rt2x00lib_update_link_stats(&rt2x00dev->link, rxdesc->rssi); + (rxdesc.dev_flags & RXDONE_MY_BSS)) + rt2x00lib_update_link_stats(&rt2x00dev->link, rxdesc.rssi); rt2x00dev->link.qual.rx_success++; rx_status->rate_idx = idx; rx_status->qual = - rt2x00lib_calculate_link_signal(rt2x00dev, rxdesc->rssi); - rx_status->signal = rxdesc->rssi; - rx_status->flag = rxdesc->flags; + rt2x00lib_calculate_link_signal(rt2x00dev, rxdesc.rssi); + rx_status->signal = rxdesc.rssi; + rx_status->flag = rxdesc.flags; rx_status->antenna = rt2x00dev->link.ant.active.rx; /* @@ -630,7 +652,11 @@ void rt2x00lib_rxdone(struct queue_entry *entry, */ rt2x00debug_dump_frame(rt2x00dev, DUMP_FRAME_RXDONE, entry->skb); ieee80211_rx_irqsafe(rt2x00dev->hw, entry->skb, rx_status); - entry->skb = NULL; + + /* + * Replace the skb with the freshly allocated one. + */ + entry->skb = skb; } EXPORT_SYMBOL_GPL(rt2x00lib_rxdone); diff --git a/drivers/net/wireless/rt2x00/rt2x00pci.c b/drivers/net/wireless/rt2x00/rt2x00pci.c index e7e3a459b66..f9d0d76f870 100644 --- a/drivers/net/wireless/rt2x00/rt2x00pci.c +++ b/drivers/net/wireless/rt2x00/rt2x00pci.c @@ -65,7 +65,7 @@ int rt2x00pci_write_tx_data(struct queue_entry *entry) skbdesc->desc_len = entry->queue->desc_size; skbdesc->entry = entry; - memcpy(entry_priv->data, entry->skb->data, entry->skb->len); + rt2x00queue_map_txskb(entry->queue->rt2x00dev, entry->skb); return 0; } @@ -74,59 +74,12 @@ EXPORT_SYMBOL_GPL(rt2x00pci_write_tx_data); /* * TX/RX data handlers. */ -static void rt2x00pci_rxdone_entry(struct rt2x00_dev *rt2x00dev, - struct queue_entry *entry) -{ - struct sk_buff *skb; - struct skb_frame_desc *skbdesc; - struct rxdone_entry_desc rxdesc; - struct queue_entry_priv_pci *entry_priv = entry->priv_data; - - /* - * Allocate a new sk_buffer. If no new buffer available, drop the - * received frame and reuse the existing buffer. - */ - skb = rt2x00queue_alloc_skb(entry->queue); - if (!skb) - return; - - /* - * Extract the RXD details. - */ - memset(&rxdesc, 0, sizeof(rxdesc)); - rt2x00dev->ops->lib->fill_rxdone(entry, &rxdesc); - - /* - * Copy the received data to the entries' skb. - */ - memcpy(entry->skb->data, entry_priv->data, rxdesc.size); - skb_trim(entry->skb, rxdesc.size); - - /* - * Fill in skb descriptor - */ - skbdesc = get_skb_frame_desc(entry->skb); - memset(skbdesc, 0, sizeof(*skbdesc)); - skbdesc->desc = entry_priv->desc; - skbdesc->desc_len = entry->queue->desc_size; - skbdesc->entry = entry; - - /* - * Send the frame to rt2x00lib for further processing. - */ - rt2x00lib_rxdone(entry, &rxdesc); - - /* - * Replace the entries' skb with the newly allocated one. - */ - entry->skb = skb; -} - void rt2x00pci_rxdone(struct rt2x00_dev *rt2x00dev) { struct data_queue *queue = rt2x00dev->rx; struct queue_entry *entry; struct queue_entry_priv_pci *entry_priv; + struct skb_frame_desc *skbdesc; u32 word; while (1) { @@ -137,12 +90,22 @@ void rt2x00pci_rxdone(struct rt2x00_dev *rt2x00dev) if (rt2x00_get_field32(word, RXD_ENTRY_OWNER_NIC)) break; - rt2x00pci_rxdone_entry(rt2x00dev, entry); + /* + * Fill in desc fields of the skb descriptor + */ + skbdesc = get_skb_frame_desc(entry->skb); + skbdesc->desc = entry_priv->desc; + skbdesc->desc_len = entry->queue->desc_size; + + /* + * Send the frame to rt2x00lib for further processing. + */ + rt2x00lib_rxdone(rt2x00dev, entry); - if (test_bit(DEVICE_ENABLED_RADIO, &queue->rt2x00dev->flags)) { - rt2x00_set_field32(&word, RXD_ENTRY_OWNER_NIC, 1); - rt2x00_desc_write(entry_priv->desc, 0, word); - } + /* + * Reset the RXD for this entry. + */ + rt2x00dev->ops->lib->init_rxentry(rt2x00dev, entry); rt2x00queue_index_inc(queue, Q_INDEX); } @@ -156,6 +119,11 @@ void rt2x00pci_txdone(struct rt2x00_dev *rt2x00dev, struct queue_entry *entry, enum data_queue_qid qid = skb_get_queue_mapping(entry->skb); u32 word; + /* + * Unmap the skb. + */ + rt2x00queue_unmap_skb(rt2x00dev, entry->skb); + rt2x00lib_txdone(entry, txdesc); /* @@ -185,33 +153,6 @@ EXPORT_SYMBOL_GPL(rt2x00pci_txdone); /* * Device initialization handlers. */ -#define desc_size(__queue) \ -({ \ - ((__queue)->limit * (__queue)->desc_size);\ -}) - -#define data_size(__queue) \ -({ \ - ((__queue)->limit * (__queue)->data_size);\ -}) - -#define dma_size(__queue) \ -({ \ - data_size(__queue) + desc_size(__queue);\ -}) - -#define desc_offset(__queue, __base, __i) \ -({ \ - (__base) + data_size(__queue) + \ - ((__i) * (__queue)->desc_size); \ -}) - -#define data_offset(__queue, __base, __i) \ -({ \ - (__base) + \ - ((__i) * (__queue)->data_size); \ -}) - static int rt2x00pci_alloc_queue_dma(struct rt2x00_dev *rt2x00dev, struct data_queue *queue) { @@ -223,22 +164,21 @@ static int rt2x00pci_alloc_queue_dma(struct rt2x00_dev *rt2x00dev, /* * Allocate DMA memory for descriptor and buffer. */ - addr = dma_alloc_coherent(rt2x00dev->dev, dma_size(queue), &dma, - GFP_KERNEL | GFP_DMA); + addr = dma_alloc_coherent(rt2x00dev->dev, + queue->limit * queue->desc_size, + &dma, GFP_KERNEL | GFP_DMA); if (!addr) return -ENOMEM; - memset(addr, 0, dma_size(queue)); + memset(addr, 0, queue->limit * queue->desc_size); /* * Initialize all queue entries to contain valid addresses. */ for (i = 0; i < queue->limit; i++) { entry_priv = queue->entries[i].priv_data; - entry_priv->desc = desc_offset(queue, addr, i); - entry_priv->desc_dma = desc_offset(queue, dma, i); - entry_priv->data = data_offset(queue, addr, i); - entry_priv->data_dma = data_offset(queue, dma, i); + entry_priv->desc = addr + i * queue->desc_size; + entry_priv->desc_dma = dma + i * queue->desc_size; } return 0; @@ -250,10 +190,11 @@ static void rt2x00pci_free_queue_dma(struct rt2x00_dev *rt2x00dev, struct queue_entry_priv_pci *entry_priv = queue->entries[0].priv_data; - if (entry_priv->data) - dma_free_coherent(rt2x00dev->dev, dma_size(queue), - entry_priv->data, entry_priv->data_dma); - entry_priv->data = NULL; + if (entry_priv->desc) + dma_free_coherent(rt2x00dev->dev, + queue->limit * queue->desc_size, + entry_priv->desc, entry_priv->desc_dma); + entry_priv->desc = NULL; } int rt2x00pci_initialize(struct rt2x00_dev *rt2x00dev) diff --git a/drivers/net/wireless/rt2x00/rt2x00pci.h b/drivers/net/wireless/rt2x00/rt2x00pci.h index 87c4a0cd78d..7e5708dca73 100644 --- a/drivers/net/wireless/rt2x00/rt2x00pci.h +++ b/drivers/net/wireless/rt2x00/rt2x00pci.h @@ -107,9 +107,6 @@ int rt2x00pci_write_tx_data(struct queue_entry *entry); struct queue_entry_priv_pci { __le32 *desc; dma_addr_t desc_dma; - - void *data; - dma_addr_t data_dma; }; /** diff --git a/drivers/net/wireless/rt2x00/rt2x00queue.c b/drivers/net/wireless/rt2x00/rt2x00queue.c index 278f1a1ac92..29d2b912853 100644 --- a/drivers/net/wireless/rt2x00/rt2x00queue.c +++ b/drivers/net/wireless/rt2x00/rt2x00queue.c @@ -25,21 +25,24 @@ #include <linux/kernel.h> #include <linux/module.h> +#include <linux/dma-mapping.h> #include "rt2x00.h" #include "rt2x00lib.h" -struct sk_buff *rt2x00queue_alloc_skb(struct data_queue *queue) +struct sk_buff *rt2x00queue_alloc_rxskb(struct rt2x00_dev *rt2x00dev, + struct queue_entry *entry) { - struct sk_buff *skb; unsigned int frame_size; unsigned int reserved_size; + struct sk_buff *skb; + struct skb_frame_desc *skbdesc; /* * The frame size includes descriptor size, because the * hardware directly receive the frame into the skbuffer. */ - frame_size = queue->data_size + queue->desc_size; + frame_size = entry->queue->data_size + entry->queue->desc_size; /* * Reserve a few bytes extra headroom to allow drivers some moving @@ -57,12 +60,67 @@ struct sk_buff *rt2x00queue_alloc_skb(struct data_queue *queue) skb_reserve(skb, reserved_size); skb_put(skb, frame_size); + /* + * Populate skbdesc. + */ + skbdesc = get_skb_frame_desc(skb); + 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); + skbdesc->flags |= SKBDESC_DMA_MAPPED_RX; + } + return skb; } -EXPORT_SYMBOL_GPL(rt2x00queue_alloc_skb); +EXPORT_SYMBOL_GPL(rt2x00queue_alloc_rxskb); -void rt2x00queue_free_skb(struct sk_buff *skb) +void rt2x00queue_map_txskb(struct rt2x00_dev *rt2x00dev, struct sk_buff *skb) { + struct skb_frame_desc *skbdesc = get_skb_frame_desc(skb); + + skbdesc->skb_dma = dma_map_single(rt2x00dev->dev, skb->data, skb->len, + DMA_TO_DEVICE); + skbdesc->flags |= SKBDESC_DMA_MAPPED_TX; +} +EXPORT_SYMBOL_GPL(rt2x00queue_map_txskb); + +void rt2x00queue_unmap_skb(struct rt2x00_dev *rt2x00dev, struct sk_buff *skb) +{ + struct skb_frame_desc *skbdesc = get_skb_frame_desc(skb); + + if (skbdesc->flags & SKBDESC_DMA_MAPPED_RX) { + dma_unmap_single(rt2x00dev->dev, skbdesc->skb_dma, skb->len, + DMA_FROM_DEVICE); + skbdesc->flags &= ~SKBDESC_DMA_MAPPED_RX; + } + + if (skbdesc->flags & SKBDESC_DMA_MAPPED_TX) { + dma_unmap_single(rt2x00dev->dev, skbdesc->skb_dma, 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) +{ + struct skb_frame_desc *skbdesc = get_skb_frame_desc(skb); + + if (skbdesc->flags & SKBDESC_DMA_MAPPED_RX) { + dma_unmap_single(rt2x00dev->dev, skbdesc->skb_dma, skb->len, + DMA_FROM_DEVICE); + } + + if (skbdesc->flags & SKBDESC_DMA_MAPPED_TX) { + dma_unmap_single(rt2x00dev->dev, skbdesc->skb_dma, skb->len, + DMA_TO_DEVICE); + } + dev_kfree_skb_any(skb); } EXPORT_SYMBOL_GPL(rt2x00queue_free_skb); @@ -421,7 +479,8 @@ static int rt2x00queue_alloc_entries(struct data_queue *queue, return 0; } -static void rt2x00queue_free_skbs(struct data_queue *queue) +static void rt2x00queue_free_skbs(struct rt2x00_dev *rt2x00dev, + struct data_queue *queue) { unsigned int i; @@ -430,27 +489,27 @@ static void rt2x00queue_free_skbs(struct data_queue *queue) for (i = 0; i < queue->limit; i++) { if (queue->entries[i].skb) - rt2x00queue_free_skb(queue->entries[i].skb); + rt2x00queue_free_skb(rt2x00dev, queue->entries[i].skb); } } -static int rt2x00queue_alloc_skbs(struct data_queue *queue) +static int rt2x00queue_alloc_rxskbs(struct rt2x00_dev *rt2x00dev, + struct data_queue *queue) { unsigned int i; struct sk_buff *skb; for (i = 0; i < queue->limit; i++) { - skb = rt2x00queue_alloc_skb(queue); + skb = rt2x00queue_alloc_rxskb(rt2x00dev, &queue->entries[i]); if (!skb) goto exit; - queue->entries[i].skb = skb; } return 0; exit: - rt2x00queue_free_skbs(queue); + rt2x00queue_free_skbs(rt2x00dev, queue); return -ENOMEM; } @@ -481,7 +540,7 @@ int rt2x00queue_initialize(struct rt2x00_dev *rt2x00dev) goto exit; } - status = rt2x00queue_alloc_skbs(rt2x00dev->rx); + status = rt2x00queue_alloc_rxskbs(rt2x00dev, rt2x00dev->rx); if (status) goto exit; @@ -499,7 +558,7 @@ void rt2x00queue_uninitialize(struct rt2x00_dev *rt2x00dev) { struct data_queue *queue; - rt2x00queue_free_skbs(rt2x00dev->rx); + rt2x00queue_free_skbs(rt2x00dev, rt2x00dev->rx); queue_for_each(rt2x00dev, queue) { kfree(queue->entries); diff --git a/drivers/net/wireless/rt2x00/rt2x00queue.h b/drivers/net/wireless/rt2x00/rt2x00queue.h index fcf52520b01..192b6e789a7 100644 --- a/drivers/net/wireless/rt2x00/rt2x00queue.h +++ b/drivers/net/wireless/rt2x00/rt2x00queue.h @@ -83,9 +83,10 @@ enum data_queue_qid { * enum skb_frame_desc_flags: Flags for &struct skb_frame_desc * */ -//enum skb_frame_desc_flags { -// TEMPORARILY EMPTY -//}; +enum skb_frame_desc_flags { + SKBDESC_DMA_MAPPED_RX = (1 << 0), + SKBDESC_DMA_MAPPED_TX = (1 << 1), +}; /** * struct skb_frame_desc: Descriptor information for the skb buffer @@ -94,19 +95,20 @@ enum data_queue_qid { * this structure should not exceed the size of that array (40 bytes). * * @flags: Frame flags, see &enum skb_frame_desc_flags. - * @data: Pointer to data part of frame (Start of ieee80211 header). + * @desc_len: Length of the frame descriptor. * @desc: Pointer to descriptor part of the frame. * Note that this pointer could point to something outside * of the scope of the skb->data pointer. - * @data_len: Length of the frame data. - * @desc_len: Length of the frame descriptor. + * @skb_dma: (PCI-only) the DMA address associated with the sk buffer. * @entry: The entry to which this sk buffer belongs. */ struct skb_frame_desc { unsigned int flags; - void *desc; unsigned int desc_len; + void *desc; + + dma_addr_t skb_dma; struct queue_entry *entry; }; diff --git a/drivers/net/wireless/rt2x00/rt2x00usb.c b/drivers/net/wireless/rt2x00/rt2x00usb.c index 29dba86c8cf..552f0e94f80 100644 --- a/drivers/net/wireless/rt2x00/rt2x00usb.c +++ b/drivers/net/wireless/rt2x00/rt2x00usb.c @@ -266,9 +266,7 @@ static void rt2x00usb_interrupt_rxdone(struct urb *urb) { struct queue_entry *entry = (struct queue_entry *)urb->context; struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; - struct sk_buff *skb; - struct skb_frame_desc *skbdesc; - struct rxdone_entry_desc rxdesc; + struct skb_frame_desc *skbdesc = get_skb_frame_desc(entry->skb); u8 rxd[32]; if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags) || @@ -284,36 +282,19 @@ static void rt2x00usb_interrupt_rxdone(struct urb *urb) goto skip_entry; /* - * Fill in skb descriptor + * Fill in desc fields of the skb descriptor */ - skbdesc = get_skb_frame_desc(entry->skb); - memset(skbdesc, 0, sizeof(*skbdesc)); - skbdesc->entry = entry; skbdesc->desc = rxd; skbdesc->desc_len = entry->queue->desc_size; - memset(&rxdesc, 0, sizeof(rxdesc)); - rt2x00dev->ops->lib->fill_rxdone(entry, &rxdesc); - - /* - * Allocate a new sk buffer to replace the current one. - * If allocation fails, we should drop the current frame - * so we can recycle the existing sk buffer for the new frame. - */ - skb = rt2x00queue_alloc_skb(entry->queue); - if (!skb) - goto skip_entry; - /* * Send the frame to rt2x00lib for further processing. */ - rt2x00lib_rxdone(entry, &rxdesc); + rt2x00lib_rxdone(rt2x00dev, entry); /* - * Replace current entry's skb with the newly allocated one, - * and reinitialize the urb. + * Reinitialize the urb. */ - entry->skb = skb; urb->transfer_buffer = entry->skb->data; urb->transfer_buffer_length = entry->skb->len; diff --git a/drivers/net/wireless/rt2x00/rt61pci.c b/drivers/net/wireless/rt2x00/rt61pci.c index 2a7f3062035..c9f6d484413 100644 --- a/drivers/net/wireless/rt2x00/rt61pci.c +++ b/drivers/net/wireless/rt2x00/rt61pci.c @@ -1030,11 +1030,12 @@ static void rt61pci_init_rxentry(struct rt2x00_dev *rt2x00dev, struct queue_entry *entry) { struct queue_entry_priv_pci *entry_priv = entry->priv_data; + struct skb_frame_desc *skbdesc = get_skb_frame_desc(entry->skb); u32 word; rt2x00_desc_read(entry_priv->desc, 5, &word); rt2x00_set_field32(&word, RXD_W5_BUFFER_PHYSICAL_ADDRESS, - entry_priv->data_dma); + skbdesc->skb_dma); rt2x00_desc_write(entry_priv->desc, 5, word); rt2x00_desc_read(entry_priv->desc, 0, &word); @@ -1522,7 +1523,6 @@ static void rt61pci_write_tx_desc(struct rt2x00_dev *rt2x00dev, struct txentry_desc *txdesc) { struct skb_frame_desc *skbdesc = get_skb_frame_desc(skb); - struct queue_entry_priv_pci *entry_priv = skbdesc->entry->priv_data; __le32 *txd = skbdesc->desc; u32 word; @@ -1557,7 +1557,7 @@ static void rt61pci_write_tx_desc(struct rt2x00_dev *rt2x00dev, rt2x00_desc_read(txd, 6, &word); rt2x00_set_field32(&word, TXD_W6_BUFFER_PHYSICAL_ADDRESS, - entry_priv->data_dma); + skbdesc->skb_dma); rt2x00_desc_write(txd, 6, word); if (skbdesc->desc_len > TXINFO_SIZE) { @@ -2302,9 +2302,10 @@ static int rt61pci_probe_hw(struct rt2x00_dev *rt2x00dev) rt61pci_probe_hw_mode(rt2x00dev); /* - * This device requires firmware. + * This device requires firmware and DMA mapped skbs. */ __set_bit(DRIVER_REQUIRE_FIRMWARE, &rt2x00dev->flags); + __set_bit(DRIVER_REQUIRE_DMA, &rt2x00dev->flags); /* * Set the rssi offset. |