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Commit 181d6902 authored by Ivo van Doorn's avatar Ivo van Doorn Committed by John W. Linville
Browse files

rt2x00: Queue handling overhaul 



This introduces a big queue handling overhaul, this also
renames "ring" to "queues".

Move queue handling into rt2x00queue.c and the matching header,
use Kerneldoc to improve rt2x00 library documentation.

Access to the queues is now protected under a spinlock, this
to prevent race conditions which could corrupt the indexing
system of the queue.

Each queue entry allocates x bytes for driver/device specific data,
this cleans up the queue structure significantly and improves
code readability.

rt2500usb no longer needs 2 entries in the beacon queue to correctly
send out the guardian byte. This is now handled in the entry specific
structure.

rt61 and rt73 now use the correct descriptor size for beacon frames,
since this data is written into the registers not the entire TXD
descriptor was used but instead of a subset of it named TXINFO.

Finally this also fixes numerous other bugs related to incorrect
beacon handling or beacon related code.

Signed-off-by: default avatarIvo van Doorn <IvDoorn@gmail.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 811aa9ca

drivers/net/wireless/rt2x00/Makefile

+1 −1
Original line number Diff line number Diff line 
rt2x00lib-objs := rt2x00dev.o rt2x00mac.o rt2x00config.o

rt2x00lib-objs := rt2x00dev.o rt2x00mac.o rt2x00config.o rt2x00queue.o



ifeq ($(CONFIG_RT2X00_LIB_DEBUGFS),y)

	rt2x00lib-objs += rt2x00debug.o

drivers/net/wireless/rt2x00/rt2400pci.c

+117 −87
Original line number Diff line number Diff line
@@ -498,13 +498,13 @@ static void rt2400pci_config(struct rt2x00_dev *rt2x00dev, 
}



static void rt2400pci_config_cw(struct rt2x00_dev *rt2x00dev,

				struct ieee80211_tx_queue_params *params)

				const int cw_min, const int cw_max)

{

	u32 reg;



	rt2x00pci_register_read(rt2x00dev, CSR11, &reg);

	rt2x00_set_field32(&reg, CSR11_CWMIN, params->cw_min);

	rt2x00_set_field32(&reg, CSR11_CWMAX, params->cw_max);

	rt2x00_set_field32(&reg, CSR11_CWMIN, cw_min);

	rt2x00_set_field32(&reg, CSR11_CWMAX, cw_max);

	rt2x00pci_register_write(rt2x00dev, CSR11, reg);

}
@@ -593,90 +593,89 @@ static void rt2400pci_link_tuner(struct rt2x00_dev *rt2x00dev) 
 * Initialization functions.

 */

static void rt2400pci_init_rxentry(struct rt2x00_dev *rt2x00dev,

				   struct data_entry *entry)

				   struct queue_entry *entry)

{

	__le32 *rxd = entry->priv;

	struct queue_entry_priv_pci_rx *priv_rx = entry->priv_data;

	u32 word;



	rt2x00_desc_read(rxd, 2, &word);

	rt2x00_set_field32(&word, RXD_W2_BUFFER_LENGTH, entry->ring->data_size);

	rt2x00_desc_write(rxd, 2, word);

	rt2x00_desc_read(priv_rx->desc, 2, &word);

	rt2x00_set_field32(&word, RXD_W2_BUFFER_LENGTH, entry->queue->data_size);

	rt2x00_desc_write(priv_rx->desc, 2, word);



	rt2x00_desc_read(rxd, 1, &word);

	rt2x00_set_field32(&word, RXD_W1_BUFFER_ADDRESS, entry->data_dma);

	rt2x00_desc_write(rxd, 1, word);

	rt2x00_desc_read(priv_rx->desc, 1, &word);

	rt2x00_set_field32(&word, RXD_W1_BUFFER_ADDRESS, priv_rx->dma);

	rt2x00_desc_write(priv_rx->desc, 1, word);



	rt2x00_desc_read(rxd, 0, &word);

	rt2x00_desc_read(priv_rx->desc, 0, &word);

	rt2x00_set_field32(&word, RXD_W0_OWNER_NIC, 1);

	rt2x00_desc_write(rxd, 0, word);

	rt2x00_desc_write(priv_rx->desc, 0, word);

}



static void rt2400pci_init_txentry(struct rt2x00_dev *rt2x00dev,

				   struct data_entry *entry)

				   struct queue_entry *entry)

{

	__le32 *txd = entry->priv;

	struct queue_entry_priv_pci_tx *priv_tx = entry->priv_data;

	u32 word;



	rt2x00_desc_read(txd, 1, &word);

	rt2x00_set_field32(&word, TXD_W1_BUFFER_ADDRESS, entry->data_dma);

	rt2x00_desc_write(txd, 1, word);

	rt2x00_desc_read(priv_tx->desc, 1, &word);

	rt2x00_set_field32(&word, TXD_W1_BUFFER_ADDRESS, priv_tx->dma);

	rt2x00_desc_write(priv_tx->desc, 1, word);



	rt2x00_desc_read(txd, 2, &word);

	rt2x00_set_field32(&word, TXD_W2_BUFFER_LENGTH, entry->ring->data_size);

	rt2x00_desc_write(txd, 2, word);

	rt2x00_desc_read(priv_tx->desc, 2, &word);

	rt2x00_set_field32(&word, TXD_W2_BUFFER_LENGTH,

			   entry->queue->data_size);

	rt2x00_desc_write(priv_tx->desc, 2, word);



	rt2x00_desc_read(txd, 0, &word);

	rt2x00_desc_read(priv_tx->desc, 0, &word);

	rt2x00_set_field32(&word, TXD_W0_VALID, 0);

	rt2x00_set_field32(&word, TXD_W0_OWNER_NIC, 0);

	rt2x00_desc_write(txd, 0, word);

	rt2x00_desc_write(priv_tx->desc, 0, word);

}



static int rt2400pci_init_rings(struct rt2x00_dev *rt2x00dev)

static int rt2400pci_init_queues(struct rt2x00_dev *rt2x00dev)

{

	struct queue_entry_priv_pci_rx *priv_rx;

	struct queue_entry_priv_pci_tx *priv_tx;

	u32 reg;



	/*

	 * Initialize registers.

	 */

	rt2x00pci_register_read(rt2x00dev, TXCSR2, &reg);

	rt2x00_set_field32(&reg, TXCSR2_TXD_SIZE,

			   rt2x00dev->tx[IEEE80211_TX_QUEUE_DATA0].desc_size);

	rt2x00_set_field32(&reg, TXCSR2_NUM_TXD,

			   rt2x00dev->tx[IEEE80211_TX_QUEUE_DATA1].stats.limit);

	rt2x00_set_field32(&reg, TXCSR2_NUM_ATIM,

			   rt2x00dev->bcn[1].stats.limit);

	rt2x00_set_field32(&reg, TXCSR2_NUM_PRIO,

			   rt2x00dev->tx[IEEE80211_TX_QUEUE_DATA0].stats.limit);

	rt2x00_set_field32(&reg, TXCSR2_TXD_SIZE, rt2x00dev->tx[0].desc_size);

	rt2x00_set_field32(&reg, TXCSR2_NUM_TXD, rt2x00dev->tx[1].limit);

	rt2x00_set_field32(&reg, TXCSR2_NUM_ATIM, rt2x00dev->bcn[1].limit);

	rt2x00_set_field32(&reg, TXCSR2_NUM_PRIO, rt2x00dev->tx[0].limit);

	rt2x00pci_register_write(rt2x00dev, TXCSR2, reg);



	priv_tx = rt2x00dev->tx[1].entries[0].priv_data;

	rt2x00pci_register_read(rt2x00dev, TXCSR3, &reg);

	rt2x00_set_field32(&reg, TXCSR3_TX_RING_REGISTER,

			   rt2x00dev->tx[IEEE80211_TX_QUEUE_DATA1].data_dma);

	rt2x00_set_field32(&reg, TXCSR3_TX_RING_REGISTER, priv_tx->dma);

	rt2x00pci_register_write(rt2x00dev, TXCSR3, reg);



	priv_tx = rt2x00dev->tx[0].entries[0].priv_data;

	rt2x00pci_register_read(rt2x00dev, TXCSR5, &reg);

	rt2x00_set_field32(&reg, TXCSR5_PRIO_RING_REGISTER,

			   rt2x00dev->tx[IEEE80211_TX_QUEUE_DATA0].data_dma);

	rt2x00_set_field32(&reg, TXCSR5_PRIO_RING_REGISTER, priv_tx->dma);

	rt2x00pci_register_write(rt2x00dev, TXCSR5, reg);



	priv_tx = rt2x00dev->bcn[1].entries[0].priv_data;

	rt2x00pci_register_read(rt2x00dev, TXCSR4, &reg);

	rt2x00_set_field32(&reg, TXCSR4_ATIM_RING_REGISTER,

			   rt2x00dev->bcn[1].data_dma);

	rt2x00_set_field32(&reg, TXCSR4_ATIM_RING_REGISTER, priv_tx->dma);

	rt2x00pci_register_write(rt2x00dev, TXCSR4, reg);



	priv_tx = rt2x00dev->bcn[0].entries[0].priv_data;

	rt2x00pci_register_read(rt2x00dev, TXCSR6, &reg);

	rt2x00_set_field32(&reg, TXCSR6_BEACON_RING_REGISTER,

			   rt2x00dev->bcn[0].data_dma);

	rt2x00_set_field32(&reg, TXCSR6_BEACON_RING_REGISTER, priv_tx->dma);

	rt2x00pci_register_write(rt2x00dev, TXCSR6, reg);



	rt2x00pci_register_read(rt2x00dev, RXCSR1, &reg);

	rt2x00_set_field32(&reg, RXCSR1_RXD_SIZE, rt2x00dev->rx->desc_size);

	rt2x00_set_field32(&reg, RXCSR1_NUM_RXD, rt2x00dev->rx->stats.limit);

	rt2x00_set_field32(&reg, RXCSR1_NUM_RXD, rt2x00dev->rx->limit);

	rt2x00pci_register_write(rt2x00dev, RXCSR1, reg);



	priv_rx = rt2x00dev->rx->entries[0].priv_data;

	rt2x00pci_register_read(rt2x00dev, RXCSR2, &reg);

	rt2x00_set_field32(&reg, RXCSR2_RX_RING_REGISTER,

			   rt2x00dev->rx->data_dma);

	rt2x00_set_field32(&reg, RXCSR2_RX_RING_REGISTER, priv_tx->dma);

	rt2x00pci_register_write(rt2x00dev, RXCSR2, reg);



	return 0;
@@ -859,7 +858,7 @@ static int rt2400pci_enable_radio(struct rt2x00_dev *rt2x00dev) 
	/*

	 * Initialize all registers.

	 */

	if (rt2400pci_init_rings(rt2x00dev) ||

	if (rt2400pci_init_queues(rt2x00dev) ||

	    rt2400pci_init_registers(rt2x00dev) ||

	    rt2400pci_init_bbp(rt2x00dev)) {

		ERROR(rt2x00dev, "Register initialization failed.\n");
@@ -986,10 +985,10 @@ static int rt2400pci_set_device_state(struct rt2x00_dev *rt2x00dev, 
 */

static void rt2400pci_write_tx_desc(struct rt2x00_dev *rt2x00dev,

				    struct sk_buff *skb,

				    struct txdata_entry_desc *desc,

				    struct txentry_desc *txdesc,

				    struct ieee80211_tx_control *control)

{

	struct skb_desc *skbdesc = get_skb_desc(skb);

	struct skb_frame_desc *skbdesc = get_skb_frame_desc(skb);

	__le32 *txd = skbdesc->desc;

	u32 word;
@@ -1001,19 +1000,19 @@ static void rt2400pci_write_tx_desc(struct rt2x00_dev *rt2x00dev, 
	rt2x00_desc_write(txd, 2, word);



	rt2x00_desc_read(txd, 3, &word);

	rt2x00_set_field32(&word, TXD_W3_PLCP_SIGNAL, desc->signal);

	rt2x00_set_field32(&word, TXD_W3_PLCP_SIGNAL, txdesc->signal);

	rt2x00_set_field32(&word, TXD_W3_PLCP_SIGNAL_REGNUM, 5);

	rt2x00_set_field32(&word, TXD_W3_PLCP_SIGNAL_BUSY, 1);

	rt2x00_set_field32(&word, TXD_W3_PLCP_SERVICE, desc->service);

	rt2x00_set_field32(&word, TXD_W3_PLCP_SERVICE, txdesc->service);

	rt2x00_set_field32(&word, TXD_W3_PLCP_SERVICE_REGNUM, 6);

	rt2x00_set_field32(&word, TXD_W3_PLCP_SERVICE_BUSY, 1);

	rt2x00_desc_write(txd, 3, word);



	rt2x00_desc_read(txd, 4, &word);

	rt2x00_set_field32(&word, TXD_W4_PLCP_LENGTH_LOW, desc->length_low);

	rt2x00_set_field32(&word, TXD_W4_PLCP_LENGTH_LOW, txdesc->length_low);

	rt2x00_set_field32(&word, TXD_W3_PLCP_LENGTH_LOW_REGNUM, 8);

	rt2x00_set_field32(&word, TXD_W3_PLCP_LENGTH_LOW_BUSY, 1);

	rt2x00_set_field32(&word, TXD_W4_PLCP_LENGTH_HIGH, desc->length_high);

	rt2x00_set_field32(&word, TXD_W4_PLCP_LENGTH_HIGH, txdesc->length_high);

	rt2x00_set_field32(&word, TXD_W3_PLCP_LENGTH_HIGH_REGNUM, 7);

	rt2x00_set_field32(&word, TXD_W3_PLCP_LENGTH_HIGH_BUSY, 1);

	rt2x00_desc_write(txd, 4, word);
@@ -1022,14 +1021,14 @@ static void rt2400pci_write_tx_desc(struct rt2x00_dev *rt2x00dev, 
	rt2x00_set_field32(&word, TXD_W0_OWNER_NIC, 1);

	rt2x00_set_field32(&word, TXD_W0_VALID, 1);

	rt2x00_set_field32(&word, TXD_W0_MORE_FRAG,

			   test_bit(ENTRY_TXD_MORE_FRAG, &desc->flags));

			   test_bit(ENTRY_TXD_MORE_FRAG, &txdesc->flags));

	rt2x00_set_field32(&word, TXD_W0_ACK,

			   test_bit(ENTRY_TXD_ACK, &desc->flags));

			   test_bit(ENTRY_TXD_ACK, &txdesc->flags));

	rt2x00_set_field32(&word, TXD_W0_TIMESTAMP,

			   test_bit(ENTRY_TXD_REQ_TIMESTAMP, &desc->flags));

			   test_bit(ENTRY_TXD_REQ_TIMESTAMP, &txdesc->flags));

	rt2x00_set_field32(&word, TXD_W0_RTS,

			   test_bit(ENTRY_TXD_RTS_FRAME, &desc->flags));

	rt2x00_set_field32(&word, TXD_W0_IFS, desc->ifs);

			   test_bit(ENTRY_TXD_RTS_FRAME, &txdesc->flags));

	rt2x00_set_field32(&word, TXD_W0_IFS, txdesc->ifs);

	rt2x00_set_field32(&word, TXD_W0_RETRY_MODE,

			   !!(control->flags &

			      IEEE80211_TXCTL_LONG_RETRY_LIMIT));
@@ -1066,49 +1065,49 @@ static void rt2400pci_kick_tx_queue(struct rt2x00_dev *rt2x00dev, 
/*

 * RX control handlers

 */

static void rt2400pci_fill_rxdone(struct data_entry *entry,

				  struct rxdata_entry_desc *desc)

static void rt2400pci_fill_rxdone(struct queue_entry *entry,

				  struct rxdone_entry_desc *rxdesc)

{

	__le32 *rxd = entry->priv;

	struct queue_entry_priv_pci_rx *priv_rx = entry->priv_data;

	u32 word0;

	u32 word2;



	rt2x00_desc_read(rxd, 0, &word0);

	rt2x00_desc_read(rxd, 2, &word2);

	rt2x00_desc_read(priv_rx->desc, 0, &word0);

	rt2x00_desc_read(priv_rx->desc, 2, &word2);



	desc->flags = 0;

	rxdesc->flags = 0;

	if (rt2x00_get_field32(word0, RXD_W0_CRC_ERROR))

		desc->flags |= RX_FLAG_FAILED_FCS_CRC;

		rxdesc->flags |= RX_FLAG_FAILED_FCS_CRC;

	if (rt2x00_get_field32(word0, RXD_W0_PHYSICAL_ERROR))

		desc->flags |= RX_FLAG_FAILED_PLCP_CRC;

		rxdesc->flags |= RX_FLAG_FAILED_PLCP_CRC;



	/*

	 * Obtain the status about this packet.

	 */

	desc->signal = rt2x00_get_field32(word2, RXD_W2_SIGNAL);

	desc->rssi = rt2x00_get_field32(word2, RXD_W2_RSSI) -

	    entry->ring->rt2x00dev->rssi_offset;

	desc->ofdm = 0;

	desc->size = rt2x00_get_field32(word0, RXD_W0_DATABYTE_COUNT);

	desc->my_bss = !!rt2x00_get_field32(word0, RXD_W0_MY_BSS);

	rxdesc->signal = rt2x00_get_field32(word2, RXD_W2_SIGNAL);

	rxdesc->rssi = rt2x00_get_field32(word2, RXD_W2_RSSI) -

	    entry->queue->rt2x00dev->rssi_offset;

	rxdesc->ofdm = 0;

	rxdesc->size = rt2x00_get_field32(word0, RXD_W0_DATABYTE_COUNT);

	rxdesc->my_bss = !!rt2x00_get_field32(word0, RXD_W0_MY_BSS);

}



/*

 * Interrupt functions.

 */

static void rt2400pci_txdone(struct rt2x00_dev *rt2x00dev, const int queue)

static void rt2400pci_txdone(struct rt2x00_dev *rt2x00dev,

			     const enum ieee80211_tx_queue queue_idx)

{

	struct data_ring *ring = rt2x00lib_get_ring(rt2x00dev, queue);

	struct data_entry *entry;

	__le32 *txd;

	struct data_queue *queue = rt2x00queue_get_queue(rt2x00dev, queue_idx);

	struct queue_entry_priv_pci_tx *priv_tx;

	struct queue_entry *entry;

	struct txdone_entry_desc txdesc;

	u32 word;

	int tx_status;

	int retry;



	while (!rt2x00_ring_empty(ring)) {

		entry = rt2x00_get_data_entry_done(ring);

		txd = entry->priv;

		rt2x00_desc_read(txd, 0, &word);

	while (!rt2x00queue_empty(queue)) {

		entry = rt2x00queue_get_entry(queue, Q_INDEX_DONE);

		priv_tx = entry->priv_data;

		rt2x00_desc_read(priv_tx->desc, 0, &word);



		if (rt2x00_get_field32(word, TXD_W0_OWNER_NIC) ||

		    !rt2x00_get_field32(word, TXD_W0_VALID))
@@ -1117,10 +1116,10 @@ static void rt2400pci_txdone(struct rt2x00_dev *rt2x00dev, const int queue) 
		/*

		 * Obtain the status about this packet.

		 */

		tx_status = rt2x00_get_field32(word, TXD_W0_RESULT);

		retry = rt2x00_get_field32(word, TXD_W0_RETRY_COUNT);

		txdesc.status = rt2x00_get_field32(word, TXD_W0_RESULT);

		txdesc.retry = rt2x00_get_field32(word, TXD_W0_RETRY_COUNT);



		rt2x00pci_txdone(rt2x00dev, entry, tx_status, retry);

		rt2x00pci_txdone(rt2x00dev, entry, &txdesc);

	}

}
@@ -1374,9 +1373,9 @@ static int rt2400pci_probe_hw(struct rt2x00_dev *rt2x00dev) 
	rt2400pci_probe_hw_mode(rt2x00dev);



	/*

	 * This device requires the beacon ring

	 * This device requires the atim queue

	 */

	__set_bit(DRIVER_REQUIRE_BEACON_RING, &rt2x00dev->flags);

	__set_bit(DRIVER_REQUIRE_ATIM_QUEUE, &rt2x00dev->flags);



	/*

	 * Set the rssi offset.
@@ -1481,7 +1480,8 @@ static int rt2400pci_conf_tx(struct ieee80211_hw *hw, 
	/*

	 * Write configuration to register.

	 */

	rt2400pci_config_cw(rt2x00dev, &rt2x00dev->tx->tx_params);

	rt2400pci_config_cw(rt2x00dev,

			    rt2x00dev->tx->cw_min, rt2x00dev->tx->cw_max);



	return 0;

}
@@ -1560,12 +1560,42 @@ static const struct rt2x00lib_ops rt2400pci_rt2x00_ops = { 
	.config			= rt2400pci_config,

};



static const struct data_queue_desc rt2400pci_queue_rx = {

	.entry_num		= RX_ENTRIES,

	.data_size		= DATA_FRAME_SIZE,

	.desc_size		= RXD_DESC_SIZE,

	.priv_size		= sizeof(struct queue_entry_priv_pci_rx),

};



static const struct data_queue_desc rt2400pci_queue_tx = {

	.entry_num		= TX_ENTRIES,

	.data_size		= DATA_FRAME_SIZE,

	.desc_size		= TXD_DESC_SIZE,

	.priv_size		= sizeof(struct queue_entry_priv_pci_tx),

};



static const struct data_queue_desc rt2400pci_queue_bcn = {

	.entry_num		= BEACON_ENTRIES,

	.data_size		= MGMT_FRAME_SIZE,

	.desc_size		= TXD_DESC_SIZE,

	.priv_size		= sizeof(struct queue_entry_priv_pci_tx),

};



static const struct data_queue_desc rt2400pci_queue_atim = {

	.entry_num		= ATIM_ENTRIES,

	.data_size		= DATA_FRAME_SIZE,

	.desc_size		= TXD_DESC_SIZE,

	.priv_size		= sizeof(struct queue_entry_priv_pci_tx),

};



static const struct rt2x00_ops rt2400pci_ops = {

	.name		= KBUILD_MODNAME,

	.rxd_size	= RXD_DESC_SIZE,

	.txd_size	= TXD_DESC_SIZE,

	.eeprom_size	= EEPROM_SIZE,

	.rf_size	= RF_SIZE,

	.rx		= &rt2400pci_queue_rx,

	.tx		= &rt2400pci_queue_tx,

	.bcn		= &rt2400pci_queue_bcn,

	.atim		= &rt2400pci_queue_atim,

	.lib		= &rt2400pci_rt2x00_ops,

	.hw		= &rt2400pci_mac80211_ops,

#ifdef CONFIG_RT2X00_LIB_DEBUGFS

drivers/net/wireless/rt2x00/rt2500pci.c

+113 −86

File changed.

Preview size limit exceeded, changes collapsed.

drivers/net/wireless/rt2x00/rt2500usb.c

+119 −82
Original line number Diff line number Diff line
@@ -1027,10 +1027,10 @@ static int rt2500usb_set_device_state(struct rt2x00_dev *rt2x00dev, 
 */

static void rt2500usb_write_tx_desc(struct rt2x00_dev *rt2x00dev,

				    struct sk_buff *skb,

				    struct txdata_entry_desc *desc,

				    struct txentry_desc *txdesc,

				    struct ieee80211_tx_control *control)

{

	struct skb_desc *skbdesc = get_skb_desc(skb);

	struct skb_frame_desc *skbdesc = get_skb_frame_desc(skb);

	__le32 *txd = skbdesc->desc;

	u32 word;
@@ -1039,31 +1039,31 @@ static void rt2500usb_write_tx_desc(struct rt2x00_dev *rt2x00dev, 
	 */

	rt2x00_desc_read(txd, 1, &word);

	rt2x00_set_field32(&word, TXD_W1_IV_OFFSET, IEEE80211_HEADER);

	rt2x00_set_field32(&word, TXD_W1_AIFS, desc->aifs);

	rt2x00_set_field32(&word, TXD_W1_CWMIN, desc->cw_min);

	rt2x00_set_field32(&word, TXD_W1_CWMAX, desc->cw_max);

	rt2x00_set_field32(&word, TXD_W1_AIFS, txdesc->aifs);

	rt2x00_set_field32(&word, TXD_W1_CWMIN, txdesc->cw_min);

	rt2x00_set_field32(&word, TXD_W1_CWMAX, txdesc->cw_max);

	rt2x00_desc_write(txd, 1, word);



	rt2x00_desc_read(txd, 2, &word);

	rt2x00_set_field32(&word, TXD_W2_PLCP_SIGNAL, desc->signal);

	rt2x00_set_field32(&word, TXD_W2_PLCP_SERVICE, desc->service);

	rt2x00_set_field32(&word, TXD_W2_PLCP_LENGTH_LOW, desc->length_low);

	rt2x00_set_field32(&word, TXD_W2_PLCP_LENGTH_HIGH, desc->length_high);

	rt2x00_set_field32(&word, TXD_W2_PLCP_SIGNAL, txdesc->signal);

	rt2x00_set_field32(&word, TXD_W2_PLCP_SERVICE, txdesc->service);

	rt2x00_set_field32(&word, TXD_W2_PLCP_LENGTH_LOW, txdesc->length_low);

	rt2x00_set_field32(&word, TXD_W2_PLCP_LENGTH_HIGH, txdesc->length_high);

	rt2x00_desc_write(txd, 2, word);



	rt2x00_desc_read(txd, 0, &word);

	rt2x00_set_field32(&word, TXD_W0_RETRY_LIMIT, control->retry_limit);

	rt2x00_set_field32(&word, TXD_W0_MORE_FRAG,

			   test_bit(ENTRY_TXD_MORE_FRAG, &desc->flags));

			   test_bit(ENTRY_TXD_MORE_FRAG, &txdesc->flags));

	rt2x00_set_field32(&word, TXD_W0_ACK,

			   test_bit(ENTRY_TXD_ACK, &desc->flags));

			   test_bit(ENTRY_TXD_ACK, &txdesc->flags));

	rt2x00_set_field32(&word, TXD_W0_TIMESTAMP,

			   test_bit(ENTRY_TXD_REQ_TIMESTAMP, &desc->flags));

			   test_bit(ENTRY_TXD_REQ_TIMESTAMP, &txdesc->flags));

	rt2x00_set_field32(&word, TXD_W0_OFDM,

			   test_bit(ENTRY_TXD_OFDM_RATE, &desc->flags));

			   test_bit(ENTRY_TXD_OFDM_RATE, &txdesc->flags));

	rt2x00_set_field32(&word, TXD_W0_NEW_SEQ,

			   !!(control->flags & IEEE80211_TXCTL_FIRST_FRAGMENT));

	rt2x00_set_field32(&word, TXD_W0_IFS, desc->ifs);

	rt2x00_set_field32(&word, TXD_W0_IFS, txdesc->ifs);

	rt2x00_set_field32(&word, TXD_W0_DATABYTE_COUNT, skbdesc->data_len);

	rt2x00_set_field32(&word, TXD_W0_CIPHER, CIPHER_NONE);

	rt2x00_desc_write(txd, 0, word);
@@ -1114,42 +1114,61 @@ static void rt2500usb_kick_tx_queue(struct rt2x00_dev *rt2x00dev, 
/*

 * RX control handlers

 */

static void rt2500usb_fill_rxdone(struct data_entry *entry,

				  struct rxdata_entry_desc *desc)

static void rt2500usb_fill_rxdone(struct queue_entry *entry,

				  struct rxdone_entry_desc *rxdesc)

{

	struct skb_desc *skbdesc = get_skb_desc(entry->skb);

	struct urb *urb = entry->priv;

	__le32 *rxd = (__le32 *)(entry->skb->data +

				 (urb->actual_length - entry->ring->desc_size));

	struct queue_entry_priv_usb_rx *priv_rx = entry->priv_data;

	struct skb_frame_desc *skbdesc = get_skb_frame_desc(entry->skb);

	__le32 *rxd =

	    (__le32 *)(entry->skb->data +

		       (priv_rx->urb->actual_length - entry->queue->desc_size));

	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)entry->skb->data;

	int header_size = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_control));

	u32 word0;

	u32 word1;



	rt2x00_desc_read(rxd, 0, &word0);

	rt2x00_desc_read(rxd, 1, &word1);



	desc->flags = 0;

	rxdesc->flags = 0;

	if (rt2x00_get_field32(word0, RXD_W0_CRC_ERROR))

		desc->flags |= RX_FLAG_FAILED_FCS_CRC;

		rxdesc->flags |= RX_FLAG_FAILED_FCS_CRC;

	if (rt2x00_get_field32(word0, RXD_W0_PHYSICAL_ERROR))

		desc->flags |= RX_FLAG_FAILED_PLCP_CRC;

		rxdesc->flags |= RX_FLAG_FAILED_PLCP_CRC;



	/*

	 * Obtain the status about this packet.

	 */

	desc->signal = rt2x00_get_field32(word1, RXD_W1_SIGNAL);

	desc->rssi = rt2x00_get_field32(word1, RXD_W1_RSSI) -

	    entry->ring->rt2x00dev->rssi_offset;

	desc->ofdm = rt2x00_get_field32(word0, RXD_W0_OFDM);

	desc->size = rt2x00_get_field32(word0, RXD_W0_DATABYTE_COUNT);

	desc->my_bss = !!rt2x00_get_field32(word0, RXD_W0_MY_BSS);

	rxdesc->signal = rt2x00_get_field32(word1, RXD_W1_SIGNAL);

	rxdesc->rssi = rt2x00_get_field32(word1, RXD_W1_RSSI) -

	    entry->queue->rt2x00dev->rssi_offset;

	rxdesc->ofdm = rt2x00_get_field32(word0, RXD_W0_OFDM);

	rxdesc->size = rt2x00_get_field32(word0, RXD_W0_DATABYTE_COUNT);

	rxdesc->my_bss = !!rt2x00_get_field32(word0, RXD_W0_MY_BSS);



	/*

	 * Set descriptor and data pointer.

	 * The data behind the ieee80211 header must be

	 * aligned on a 4 byte boundary.

	 */

	if (header_size % 4 == 0) {

		skb_push(entry->skb, 2);

		memmove(entry->skb->data, entry->skb->data + 2,

			entry->skb->len - 2);

	}



	/*

	 * Set descriptor pointer.

	 */

	skbdesc->desc = entry->skb->data + desc->size;

	skbdesc->desc_len = entry->ring->desc_size;

	skbdesc->data = entry->skb->data;

	skbdesc->data_len = desc->size;

	skbdesc->data_len = entry->queue->data_size;

	skbdesc->desc = entry->skb->data + rxdesc->size;

	skbdesc->desc_len = entry->queue->desc_size;



	/*

	 * Remove descriptor from skb buffer and trim the whole thing

	 * down to only contain data.

	 */

	skb_trim(entry->skb, rxdesc->size);

}



/*
@@ -1157,10 +1176,10 @@ static void rt2500usb_fill_rxdone(struct data_entry *entry, 
 */

static void rt2500usb_beacondone(struct urb *urb)

{

	struct data_entry *entry = (struct data_entry *)urb->context;

	struct data_ring *ring = entry->ring;

	struct queue_entry *entry = (struct queue_entry *)urb->context;

	struct queue_entry_priv_usb_bcn *priv_bcn = entry->priv_data;



	if (!test_bit(DEVICE_ENABLED_RADIO, &ring->rt2x00dev->flags))

	if (!test_bit(DEVICE_ENABLED_RADIO, &entry->queue->rt2x00dev->flags))

		return;



	/*
@@ -1169,19 +1188,12 @@ static void rt2500usb_beacondone(struct urb *urb) 
	 * Otherwise we should free the sk_buffer, the device

	 * should be doing the rest of the work now.

	 */

	if (ring->index == 1) {

		rt2x00_ring_index_done_inc(ring);

		entry = rt2x00_get_data_entry(ring);

		usb_submit_urb(entry->priv, GFP_ATOMIC);

		rt2x00_ring_index_inc(ring);

	} else if (ring->index_done == 1) {

		entry = rt2x00_get_data_entry_done(ring);

		if (entry->skb) {

	if (priv_bcn->guardian_urb == urb) {

		usb_submit_urb(priv_bcn->urb, GFP_ATOMIC);

	} else if (priv_bcn->urb == urb) {

		dev_kfree_skb(entry->skb);

		entry->skb = NULL;

	}

		rt2x00_ring_index_done_inc(ring);

	}

}



/*
@@ -1599,9 +1611,10 @@ static int rt2500usb_probe_hw(struct rt2x00_dev *rt2x00dev) 
	rt2500usb_probe_hw_mode(rt2x00dev);



	/*

	 * This device requires the beacon ring

	 * This device requires the atim queue

	 */

	__set_bit(DRIVER_REQUIRE_BEACON_RING, &rt2x00dev->flags);

	__set_bit(DRIVER_REQUIRE_ATIM_QUEUE, &rt2x00dev->flags);

	__set_bit(DRIVER_REQUIRE_BEACON_GUARD, &rt2x00dev->flags);



	/*

	 * Set the rssi offset.
@@ -1691,12 +1704,11 @@ static int rt2500usb_beacon_update(struct ieee80211_hw *hw, 
				   struct ieee80211_tx_control *control)

{

	struct rt2x00_dev *rt2x00dev = hw->priv;

	struct usb_device *usb_dev =

	    interface_to_usbdev(rt2x00dev_usb(rt2x00dev));

	struct skb_desc *desc;

	struct data_ring *ring;

	struct data_entry *beacon;

	struct data_entry *guardian;

	struct usb_device *usb_dev = rt2x00dev_usb_dev(rt2x00dev);

	struct queue_entry_priv_usb_bcn *priv_bcn;

	struct skb_frame_desc *skbdesc;

	struct data_queue *queue;

	struct queue_entry *entry;

	int pipe = usb_sndbulkpipe(usb_dev, 1);

	int length;
@@ -1706,32 +1718,26 @@ static int rt2500usb_beacon_update(struct ieee80211_hw *hw, 
	 * initialization.

	 */

	control->queue = IEEE80211_TX_QUEUE_BEACON;

	ring = rt2x00lib_get_ring(rt2x00dev, control->queue);



	/*

	 * Obtain 2 entries, one for the guardian byte,

	 * the second for the actual beacon.

	 */

	guardian = rt2x00_get_data_entry(ring);

	rt2x00_ring_index_inc(ring);

	beacon = rt2x00_get_data_entry(ring);

	queue = rt2x00queue_get_queue(rt2x00dev, control->queue);

	entry = rt2x00queue_get_entry(queue, Q_INDEX);

	priv_bcn = entry->priv_data;



	/*

	 * Add the descriptor in front of the skb.

	 */

	skb_push(skb, ring->desc_size);

	memset(skb->data, 0, ring->desc_size);

	skb_push(skb, queue->desc_size);

	memset(skb->data, 0, queue->desc_size);



	/*

	 * Fill in skb descriptor

	 */

	desc = get_skb_desc(skb);

	desc->desc_len = ring->desc_size;

	desc->data_len = skb->len - ring->desc_size;

	desc->desc = skb->data;

	desc->data = skb->data + ring->desc_size;

	desc->ring = ring;

	desc->entry = beacon;

	skbdesc = get_skb_frame_desc(skb);

	memset(skbdesc, 0, sizeof(*skbdesc));

	skbdesc->data = skb->data + queue->desc_size;

	skbdesc->data_len = queue->data_size;

	skbdesc->desc = skb->data;

	skbdesc->desc_len = queue->desc_size;

	skbdesc->entry = entry;



	rt2x00lib_write_tx_desc(rt2x00dev, skb, control);
@@ -1742,22 +1748,23 @@ static int rt2500usb_beacon_update(struct ieee80211_hw *hw, 
	 */

	length = rt2500usb_get_tx_data_len(rt2x00dev, skb);



	usb_fill_bulk_urb(beacon->priv, usb_dev, pipe,

			  skb->data, length, rt2500usb_beacondone, beacon);

	usb_fill_bulk_urb(priv_bcn->urb, usb_dev, pipe,

			  skb->data, length, rt2500usb_beacondone, entry);



	/*

	 * Second we need to create the guardian byte.

	 * We only need a single byte, so lets recycle

	 * the 'flags' field we are not using for beacons.

	 */

	guardian->flags = 0;

	usb_fill_bulk_urb(guardian->priv, usb_dev, pipe,

			  &guardian->flags, 1, rt2500usb_beacondone, guardian);

	priv_bcn->guardian_data = 0;

	usb_fill_bulk_urb(priv_bcn->guardian_urb, usb_dev, pipe,

			  &priv_bcn->guardian_data, 1, rt2500usb_beacondone,

			  entry);



	/*

	 * Send out the guardian byte.

	 */

	usb_submit_urb(guardian->priv, GFP_ATOMIC);

	usb_submit_urb(priv_bcn->guardian_urb, GFP_ATOMIC);



	/*

	 * Enable beacon generation.
@@ -1805,12 +1812,42 @@ static const struct rt2x00lib_ops rt2500usb_rt2x00_ops = { 
	.config			= rt2500usb_config,

};



static const struct data_queue_desc rt2500usb_queue_rx = {

	.entry_num		= RX_ENTRIES,

	.data_size		= DATA_FRAME_SIZE,

	.desc_size		= RXD_DESC_SIZE,

	.priv_size		= sizeof(struct queue_entry_priv_usb_rx),

};



static const struct data_queue_desc rt2500usb_queue_tx = {

	.entry_num		= TX_ENTRIES,

	.data_size		= DATA_FRAME_SIZE,

	.desc_size		= TXD_DESC_SIZE,

	.priv_size		= sizeof(struct queue_entry_priv_usb_tx),

};



static const struct data_queue_desc rt2500usb_queue_bcn = {

	.entry_num		= BEACON_ENTRIES,

	.data_size		= MGMT_FRAME_SIZE,

	.desc_size		= TXD_DESC_SIZE,

	.priv_size		= sizeof(struct queue_entry_priv_usb_bcn),

};



static const struct data_queue_desc rt2500usb_queue_atim = {

	.entry_num		= ATIM_ENTRIES,

	.data_size		= DATA_FRAME_SIZE,

	.desc_size		= TXD_DESC_SIZE,

	.priv_size		= sizeof(struct queue_entry_priv_usb_tx),

};



static const struct rt2x00_ops rt2500usb_ops = {

	.name		= KBUILD_MODNAME,

	.rxd_size	= RXD_DESC_SIZE,

	.txd_size	= TXD_DESC_SIZE,

	.eeprom_size	= EEPROM_SIZE,

	.rf_size	= RF_SIZE,

	.rx		= &rt2500usb_queue_rx,

	.tx		= &rt2500usb_queue_tx,

	.bcn		= &rt2500usb_queue_bcn,

	.atim		= &rt2500usb_queue_atim,

	.lib		= &rt2500usb_rt2x00_ops,

	.hw		= &rt2500usb_mac80211_ops,

#ifdef CONFIG_RT2X00_LIB_DEBUGFS

drivers/net/wireless/rt2x00/rt2x00.h

+54 −79

File changed.

Preview size limit exceeded, changes collapsed.