1 /******************************************************************************
3 * Copyright(c) 2003 - 2010 Intel Corporation. All rights reserved.
5 * Portions of this file are derived from the ipw3945 project, as well
6 * as portions of the ieee80211 subsystem header files.
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of version 2 of the GNU General Public License as
10 * published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
17 * You should have received a copy of the GNU General Public License along with
18 * this program; if not, write to the Free Software Foundation, Inc.,
19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
21 * The full GNU General Public License is included in this distribution in the
22 * file called LICENSE.
24 * Contact Information:
25 * Intel Linux Wireless <ilw@linux.intel.com>
26 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
28 *****************************************************************************/
30 #include <linux/etherdevice.h>
31 #include <linux/sched.h>
32 #include <net/mac80211.h>
33 #include "iwl-eeprom.h"
38 #include "iwl-helpers.h"
40 static const u16 default_tid_to_tx_fifo
[] = {
60 static inline int iwl_alloc_dma_ptr(struct iwl_priv
*priv
,
61 struct iwl_dma_ptr
*ptr
, size_t size
)
63 ptr
->addr
= pci_alloc_consistent(priv
->pci_dev
, size
, &ptr
->dma
);
70 static inline void iwl_free_dma_ptr(struct iwl_priv
*priv
,
71 struct iwl_dma_ptr
*ptr
)
73 if (unlikely(!ptr
->addr
))
76 pci_free_consistent(priv
->pci_dev
, ptr
->size
, ptr
->addr
, ptr
->dma
);
77 memset(ptr
, 0, sizeof(*ptr
));
81 * iwl_txq_update_write_ptr - Send new write index to hardware
83 void iwl_txq_update_write_ptr(struct iwl_priv
*priv
, struct iwl_tx_queue
*txq
)
86 int txq_id
= txq
->q
.id
;
88 if (txq
->need_update
== 0)
91 /* if we're trying to save power */
92 if (test_bit(STATUS_POWER_PMI
, &priv
->status
)) {
93 /* wake up nic if it's powered down ...
94 * uCode will wake up, and interrupt us again, so next
95 * time we'll skip this part. */
96 reg
= iwl_read32(priv
, CSR_UCODE_DRV_GP1
);
98 if (reg
& CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP
) {
99 IWL_DEBUG_INFO(priv
, "Tx queue %d requesting wakeup, GP1 = 0x%x\n",
101 iwl_set_bit(priv
, CSR_GP_CNTRL
,
102 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ
);
106 iwl_write_direct32(priv
, HBUS_TARG_WRPTR
,
107 txq
->q
.write_ptr
| (txq_id
<< 8));
109 /* else not in power-save mode, uCode will never sleep when we're
110 * trying to tx (during RFKILL, we're not trying to tx). */
112 iwl_write32(priv
, HBUS_TARG_WRPTR
,
113 txq
->q
.write_ptr
| (txq_id
<< 8));
115 txq
->need_update
= 0;
117 EXPORT_SYMBOL(iwl_txq_update_write_ptr
);
121 * iwl_tx_queue_free - Deallocate DMA queue.
122 * @txq: Transmit queue to deallocate.
124 * Empty queue by removing and destroying all BD's.
126 * 0-fill, but do not free "txq" descriptor structure.
128 void iwl_tx_queue_free(struct iwl_priv
*priv
, int txq_id
)
130 struct iwl_tx_queue
*txq
= &priv
->txq
[txq_id
];
131 struct iwl_queue
*q
= &txq
->q
;
132 struct pci_dev
*dev
= priv
->pci_dev
;
138 /* first, empty all BD's */
139 for (; q
->write_ptr
!= q
->read_ptr
;
140 q
->read_ptr
= iwl_queue_inc_wrap(q
->read_ptr
, q
->n_bd
))
141 priv
->cfg
->ops
->lib
->txq_free_tfd(priv
, txq
);
143 /* De-alloc array of command/tx buffers */
144 for (i
= 0; i
< TFD_TX_CMD_SLOTS
; i
++)
147 /* De-alloc circular buffer of TFDs */
149 pci_free_consistent(dev
, priv
->hw_params
.tfd_size
*
150 txq
->q
.n_bd
, txq
->tfds
, txq
->q
.dma_addr
);
152 /* De-alloc array of per-TFD driver data */
156 /* deallocate arrays */
162 /* 0-fill queue descriptor structure */
163 memset(txq
, 0, sizeof(*txq
));
165 EXPORT_SYMBOL(iwl_tx_queue_free
);
168 * iwl_cmd_queue_free - Deallocate DMA queue.
169 * @txq: Transmit queue to deallocate.
171 * Empty queue by removing and destroying all BD's.
173 * 0-fill, but do not free "txq" descriptor structure.
175 void iwl_cmd_queue_free(struct iwl_priv
*priv
)
177 struct iwl_tx_queue
*txq
= &priv
->txq
[IWL_CMD_QUEUE_NUM
];
178 struct iwl_queue
*q
= &txq
->q
;
179 struct pci_dev
*dev
= priv
->pci_dev
;
185 /* De-alloc array of command/tx buffers */
186 for (i
= 0; i
<= TFD_CMD_SLOTS
; i
++)
189 /* De-alloc circular buffer of TFDs */
191 pci_free_consistent(dev
, priv
->hw_params
.tfd_size
*
192 txq
->q
.n_bd
, txq
->tfds
, txq
->q
.dma_addr
);
194 /* deallocate arrays */
200 /* 0-fill queue descriptor structure */
201 memset(txq
, 0, sizeof(*txq
));
203 EXPORT_SYMBOL(iwl_cmd_queue_free
);
205 /*************** DMA-QUEUE-GENERAL-FUNCTIONS *****
208 * Theory of operation
210 * A Tx or Rx queue resides in host DRAM, and is comprised of a circular buffer
211 * of buffer descriptors, each of which points to one or more data buffers for
212 * the device to read from or fill. Driver and device exchange status of each
213 * queue via "read" and "write" pointers. Driver keeps minimum of 2 empty
214 * entries in each circular buffer, to protect against confusing empty and full
217 * The device reads or writes the data in the queues via the device's several
218 * DMA/FIFO channels. Each queue is mapped to a single DMA channel.
220 * For Tx queue, there are low mark and high mark limits. If, after queuing
221 * the packet for Tx, free space become < low mark, Tx queue stopped. When
222 * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
225 * See more detailed info in iwl-4965-hw.h.
226 ***************************************************/
228 int iwl_queue_space(const struct iwl_queue
*q
)
230 int s
= q
->read_ptr
- q
->write_ptr
;
232 if (q
->read_ptr
> q
->write_ptr
)
237 /* keep some reserve to not confuse empty and full situations */
243 EXPORT_SYMBOL(iwl_queue_space
);
247 * iwl_queue_init - Initialize queue's high/low-water and read/write indexes
249 static int iwl_queue_init(struct iwl_priv
*priv
, struct iwl_queue
*q
,
250 int count
, int slots_num
, u32 id
)
253 q
->n_window
= slots_num
;
256 /* count must be power-of-two size, otherwise iwl_queue_inc_wrap
257 * and iwl_queue_dec_wrap are broken. */
258 BUG_ON(!is_power_of_2(count
));
260 /* slots_num must be power-of-two size, otherwise
261 * get_cmd_index is broken. */
262 BUG_ON(!is_power_of_2(slots_num
));
264 q
->low_mark
= q
->n_window
/ 4;
268 q
->high_mark
= q
->n_window
/ 8;
269 if (q
->high_mark
< 2)
272 q
->write_ptr
= q
->read_ptr
= 0;
278 * iwl_tx_queue_alloc - Alloc driver data and TFD CB for one Tx/cmd queue
280 static int iwl_tx_queue_alloc(struct iwl_priv
*priv
,
281 struct iwl_tx_queue
*txq
, u32 id
)
283 struct pci_dev
*dev
= priv
->pci_dev
;
284 size_t tfd_sz
= priv
->hw_params
.tfd_size
* TFD_QUEUE_SIZE_MAX
;
286 /* Driver private data, only for Tx (not command) queues,
287 * not shared with device. */
288 if (id
!= IWL_CMD_QUEUE_NUM
) {
289 txq
->txb
= kmalloc(sizeof(txq
->txb
[0]) *
290 TFD_QUEUE_SIZE_MAX
, GFP_KERNEL
);
292 IWL_ERR(priv
, "kmalloc for auxiliary BD "
293 "structures failed\n");
300 /* Circular buffer of transmit frame descriptors (TFDs),
301 * shared with device */
302 txq
->tfds
= pci_alloc_consistent(dev
, tfd_sz
, &txq
->q
.dma_addr
);
305 IWL_ERR(priv
, "pci_alloc_consistent(%zd) failed\n", tfd_sz
);
320 * iwl_tx_queue_init - Allocate and initialize one tx/cmd queue
322 int iwl_tx_queue_init(struct iwl_priv
*priv
, struct iwl_tx_queue
*txq
,
323 int slots_num
, u32 txq_id
)
327 int actual_slots
= slots_num
;
330 * Alloc buffer array for commands (Tx or other types of commands).
331 * For the command queue (#4), allocate command space + one big
332 * command for scan, since scan command is very huge; the system will
333 * not have two scans at the same time, so only one is needed.
334 * For normal Tx queues (all other queues), no super-size command
337 if (txq_id
== IWL_CMD_QUEUE_NUM
)
340 txq
->meta
= kzalloc(sizeof(struct iwl_cmd_meta
) * actual_slots
,
342 txq
->cmd
= kzalloc(sizeof(struct iwl_device_cmd
*) * actual_slots
,
345 if (!txq
->meta
|| !txq
->cmd
)
346 goto out_free_arrays
;
348 len
= sizeof(struct iwl_device_cmd
);
349 for (i
= 0; i
< actual_slots
; i
++) {
350 /* only happens for cmd queue */
352 len
+= IWL_MAX_SCAN_SIZE
;
354 txq
->cmd
[i
] = kmalloc(len
, GFP_KERNEL
);
359 /* Alloc driver data array and TFD circular buffer */
360 ret
= iwl_tx_queue_alloc(priv
, txq
, txq_id
);
364 txq
->need_update
= 0;
367 * Aggregation TX queues will get their ID when aggregation begins;
368 * they overwrite the setting done here. The command FIFO doesn't
369 * need an swq_id so don't set one to catch errors, all others can
370 * be set up to the identity mapping.
372 if (txq_id
!= IWL_CMD_QUEUE_NUM
)
373 txq
->swq_id
= txq_id
;
375 /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
376 * iwl_queue_inc_wrap and iwl_queue_dec_wrap are broken. */
377 BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX
& (TFD_QUEUE_SIZE_MAX
- 1));
379 /* Initialize queue's high/low-water marks, and head/tail indexes */
380 iwl_queue_init(priv
, &txq
->q
, TFD_QUEUE_SIZE_MAX
, slots_num
, txq_id
);
382 /* Tell device where to find queue */
383 priv
->cfg
->ops
->lib
->txq_init(priv
, txq
);
387 for (i
= 0; i
< actual_slots
; i
++)
395 EXPORT_SYMBOL(iwl_tx_queue_init
);
398 * iwl_hw_txq_ctx_free - Free TXQ Context
400 * Destroy all TX DMA queues and structures
402 void iwl_hw_txq_ctx_free(struct iwl_priv
*priv
)
408 for (txq_id
= 0; txq_id
< priv
->hw_params
.max_txq_num
;
410 if (txq_id
== IWL_CMD_QUEUE_NUM
)
411 iwl_cmd_queue_free(priv
);
413 iwl_tx_queue_free(priv
, txq_id
);
415 iwl_free_dma_ptr(priv
, &priv
->kw
);
417 iwl_free_dma_ptr(priv
, &priv
->scd_bc_tbls
);
419 /* free tx queue structure */
420 iwl_free_txq_mem(priv
);
422 EXPORT_SYMBOL(iwl_hw_txq_ctx_free
);
425 * iwl_txq_ctx_reset - Reset TX queue context
426 * Destroys all DMA structures and initialize them again
431 int iwl_txq_ctx_reset(struct iwl_priv
*priv
)
434 int txq_id
, slots_num
;
437 /* Free all tx/cmd queues and keep-warm buffer */
438 iwl_hw_txq_ctx_free(priv
);
440 ret
= iwl_alloc_dma_ptr(priv
, &priv
->scd_bc_tbls
,
441 priv
->hw_params
.scd_bc_tbls_size
);
443 IWL_ERR(priv
, "Scheduler BC Table allocation failed\n");
446 /* Alloc keep-warm buffer */
447 ret
= iwl_alloc_dma_ptr(priv
, &priv
->kw
, IWL_KW_SIZE
);
449 IWL_ERR(priv
, "Keep Warm allocation failed\n");
453 /* allocate tx queue structure */
454 ret
= iwl_alloc_txq_mem(priv
);
458 spin_lock_irqsave(&priv
->lock
, flags
);
460 /* Turn off all Tx DMA fifos */
461 priv
->cfg
->ops
->lib
->txq_set_sched(priv
, 0);
463 /* Tell NIC where to find the "keep warm" buffer */
464 iwl_write_direct32(priv
, FH_KW_MEM_ADDR_REG
, priv
->kw
.dma
>> 4);
466 spin_unlock_irqrestore(&priv
->lock
, flags
);
468 /* Alloc and init all Tx queues, including the command queue (#4) */
469 for (txq_id
= 0; txq_id
< priv
->hw_params
.max_txq_num
; txq_id
++) {
470 slots_num
= (txq_id
== IWL_CMD_QUEUE_NUM
) ?
471 TFD_CMD_SLOTS
: TFD_TX_CMD_SLOTS
;
472 ret
= iwl_tx_queue_init(priv
, &priv
->txq
[txq_id
], slots_num
,
475 IWL_ERR(priv
, "Tx %d queue init failed\n", txq_id
);
483 iwl_hw_txq_ctx_free(priv
);
484 iwl_free_dma_ptr(priv
, &priv
->kw
);
486 iwl_free_dma_ptr(priv
, &priv
->scd_bc_tbls
);
492 * iwl_txq_ctx_stop - Stop all Tx DMA channels, free Tx queue memory
494 void iwl_txq_ctx_stop(struct iwl_priv
*priv
)
499 /* Turn off all Tx DMA fifos */
500 spin_lock_irqsave(&priv
->lock
, flags
);
502 priv
->cfg
->ops
->lib
->txq_set_sched(priv
, 0);
504 /* Stop each Tx DMA channel, and wait for it to be idle */
505 for (ch
= 0; ch
< priv
->hw_params
.dma_chnl_num
; ch
++) {
506 iwl_write_direct32(priv
, FH_TCSR_CHNL_TX_CONFIG_REG(ch
), 0x0);
507 iwl_poll_direct_bit(priv
, FH_TSSR_TX_STATUS_REG
,
508 FH_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(ch
),
511 spin_unlock_irqrestore(&priv
->lock
, flags
);
513 /* Deallocate memory for all Tx queues */
514 iwl_hw_txq_ctx_free(priv
);
516 EXPORT_SYMBOL(iwl_txq_ctx_stop
);
519 * handle build REPLY_TX command notification.
521 static void iwl_tx_cmd_build_basic(struct iwl_priv
*priv
,
522 struct iwl_tx_cmd
*tx_cmd
,
523 struct ieee80211_tx_info
*info
,
524 struct ieee80211_hdr
*hdr
,
527 __le16 fc
= hdr
->frame_control
;
528 __le32 tx_flags
= tx_cmd
->tx_flags
;
530 tx_cmd
->stop_time
.life_time
= TX_CMD_LIFE_TIME_INFINITE
;
531 if (!(info
->flags
& IEEE80211_TX_CTL_NO_ACK
)) {
532 tx_flags
|= TX_CMD_FLG_ACK_MSK
;
533 if (ieee80211_is_mgmt(fc
))
534 tx_flags
|= TX_CMD_FLG_SEQ_CTL_MSK
;
535 if (ieee80211_is_probe_resp(fc
) &&
536 !(le16_to_cpu(hdr
->seq_ctrl
) & 0xf))
537 tx_flags
|= TX_CMD_FLG_TSF_MSK
;
539 tx_flags
&= (~TX_CMD_FLG_ACK_MSK
);
540 tx_flags
|= TX_CMD_FLG_SEQ_CTL_MSK
;
543 if (ieee80211_is_back_req(fc
))
544 tx_flags
|= TX_CMD_FLG_ACK_MSK
| TX_CMD_FLG_IMM_BA_RSP_MASK
;
547 tx_cmd
->sta_id
= std_id
;
548 if (ieee80211_has_morefrags(fc
))
549 tx_flags
|= TX_CMD_FLG_MORE_FRAG_MSK
;
551 if (ieee80211_is_data_qos(fc
)) {
552 u8
*qc
= ieee80211_get_qos_ctl(hdr
);
553 tx_cmd
->tid_tspec
= qc
[0] & 0xf;
554 tx_flags
&= ~TX_CMD_FLG_SEQ_CTL_MSK
;
556 tx_flags
|= TX_CMD_FLG_SEQ_CTL_MSK
;
559 priv
->cfg
->ops
->utils
->rts_tx_cmd_flag(info
, &tx_flags
);
561 if ((tx_flags
& TX_CMD_FLG_RTS_MSK
) || (tx_flags
& TX_CMD_FLG_CTS_MSK
))
562 tx_flags
|= TX_CMD_FLG_FULL_TXOP_PROT_MSK
;
564 tx_flags
&= ~(TX_CMD_FLG_ANT_SEL_MSK
);
565 if (ieee80211_is_mgmt(fc
)) {
566 if (ieee80211_is_assoc_req(fc
) || ieee80211_is_reassoc_req(fc
))
567 tx_cmd
->timeout
.pm_frame_timeout
= cpu_to_le16(3);
569 tx_cmd
->timeout
.pm_frame_timeout
= cpu_to_le16(2);
571 tx_cmd
->timeout
.pm_frame_timeout
= 0;
574 tx_cmd
->driver_txop
= 0;
575 tx_cmd
->tx_flags
= tx_flags
;
576 tx_cmd
->next_frame_len
= 0;
579 #define RTS_HCCA_RETRY_LIMIT 3
580 #define RTS_DFAULT_RETRY_LIMIT 60
582 static void iwl_tx_cmd_build_rate(struct iwl_priv
*priv
,
583 struct iwl_tx_cmd
*tx_cmd
,
584 struct ieee80211_tx_info
*info
,
585 __le16 fc
, int is_hcca
)
593 /* Set retry limit on DATA packets and Probe Responses*/
594 if (ieee80211_is_probe_resp(fc
))
595 data_retry_limit
= 3;
597 data_retry_limit
= IWL_DEFAULT_TX_RETRY
;
598 tx_cmd
->data_retry_limit
= data_retry_limit
;
600 /* Set retry limit on RTS packets */
601 rts_retry_limit
= (is_hcca
) ? RTS_HCCA_RETRY_LIMIT
:
602 RTS_DFAULT_RETRY_LIMIT
;
603 if (data_retry_limit
< rts_retry_limit
)
604 rts_retry_limit
= data_retry_limit
;
605 tx_cmd
->rts_retry_limit
= rts_retry_limit
;
607 /* DATA packets will use the uCode station table for rate/antenna
609 if (ieee80211_is_data(fc
)) {
610 tx_cmd
->initial_rate_index
= 0;
611 tx_cmd
->tx_flags
|= TX_CMD_FLG_STA_RATE_MSK
;
616 * If the current TX rate stored in mac80211 has the MCS bit set, it's
617 * not really a TX rate. Thus, we use the lowest supported rate for
618 * this band. Also use the lowest supported rate if the stored rate
621 rate_idx
= info
->control
.rates
[0].idx
;
622 if (info
->control
.rates
[0].flags
& IEEE80211_TX_RC_MCS
||
623 (rate_idx
< 0) || (rate_idx
> IWL_RATE_COUNT_LEGACY
))
624 rate_idx
= rate_lowest_index(&priv
->bands
[info
->band
],
626 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
627 if (info
->band
== IEEE80211_BAND_5GHZ
)
628 rate_idx
+= IWL_FIRST_OFDM_RATE
;
629 /* Get PLCP rate for tx_cmd->rate_n_flags */
630 rate_plcp
= iwl_rates
[rate_idx
].plcp
;
631 /* Zero out flags for this packet */
634 /* Set CCK flag as needed */
635 if ((rate_idx
>= IWL_FIRST_CCK_RATE
) && (rate_idx
<= IWL_LAST_CCK_RATE
))
636 rate_flags
|= RATE_MCS_CCK_MSK
;
638 /* Set up RTS and CTS flags for certain packets */
639 switch (fc
& cpu_to_le16(IEEE80211_FCTL_STYPE
)) {
640 case cpu_to_le16(IEEE80211_STYPE_AUTH
):
641 case cpu_to_le16(IEEE80211_STYPE_DEAUTH
):
642 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ
):
643 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ
):
644 if (tx_cmd
->tx_flags
& TX_CMD_FLG_RTS_MSK
) {
645 tx_cmd
->tx_flags
&= ~TX_CMD_FLG_RTS_MSK
;
646 tx_cmd
->tx_flags
|= TX_CMD_FLG_CTS_MSK
;
653 /* Set up antennas */
654 priv
->mgmt_tx_ant
= iwl_toggle_tx_ant(priv
, priv
->mgmt_tx_ant
);
655 rate_flags
|= iwl_ant_idx_to_flags(priv
->mgmt_tx_ant
);
657 /* Set the rate in the TX cmd */
658 tx_cmd
->rate_n_flags
= iwl_hw_set_rate_n_flags(rate_plcp
, rate_flags
);
661 static void iwl_tx_cmd_build_hwcrypto(struct iwl_priv
*priv
,
662 struct ieee80211_tx_info
*info
,
663 struct iwl_tx_cmd
*tx_cmd
,
664 struct sk_buff
*skb_frag
,
667 struct ieee80211_key_conf
*keyconf
= info
->control
.hw_key
;
669 switch (keyconf
->alg
) {
671 tx_cmd
->sec_ctl
= TX_CMD_SEC_CCM
;
672 memcpy(tx_cmd
->key
, keyconf
->key
, keyconf
->keylen
);
673 if (info
->flags
& IEEE80211_TX_CTL_AMPDU
)
674 tx_cmd
->tx_flags
|= TX_CMD_FLG_AGG_CCMP_MSK
;
675 IWL_DEBUG_TX(priv
, "tx_cmd with AES hwcrypto\n");
679 tx_cmd
->sec_ctl
= TX_CMD_SEC_TKIP
;
680 ieee80211_get_tkip_key(keyconf
, skb_frag
,
681 IEEE80211_TKIP_P2_KEY
, tx_cmd
->key
);
682 IWL_DEBUG_TX(priv
, "tx_cmd with tkip hwcrypto\n");
686 tx_cmd
->sec_ctl
|= (TX_CMD_SEC_WEP
|
687 (keyconf
->keyidx
& TX_CMD_SEC_MSK
) << TX_CMD_SEC_SHIFT
);
689 if (keyconf
->keylen
== WEP_KEY_LEN_128
)
690 tx_cmd
->sec_ctl
|= TX_CMD_SEC_KEY128
;
692 memcpy(&tx_cmd
->key
[3], keyconf
->key
, keyconf
->keylen
);
694 IWL_DEBUG_TX(priv
, "Configuring packet for WEP encryption "
695 "with key %d\n", keyconf
->keyidx
);
699 IWL_ERR(priv
, "Unknown encode alg %d\n", keyconf
->alg
);
705 * start REPLY_TX command process
707 int iwl_tx_skb(struct iwl_priv
*priv
, struct sk_buff
*skb
)
709 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
710 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
711 struct ieee80211_sta
*sta
= info
->control
.sta
;
712 struct iwl_station_priv
*sta_priv
= NULL
;
713 struct iwl_tx_queue
*txq
;
715 struct iwl_device_cmd
*out_cmd
;
716 struct iwl_cmd_meta
*out_meta
;
717 struct iwl_tx_cmd
*tx_cmd
;
719 dma_addr_t phys_addr
;
720 dma_addr_t txcmd_phys
;
721 dma_addr_t scratch_phys
;
722 u16 len
, len_org
, firstlen
, secondlen
;
727 u8 wait_write_ptr
= 0;
732 spin_lock_irqsave(&priv
->lock
, flags
);
733 if (iwl_is_rfkill(priv
)) {
734 IWL_DEBUG_DROP(priv
, "Dropping - RF KILL\n");
738 fc
= hdr
->frame_control
;
740 #ifdef CONFIG_IWLWIFI_DEBUG
741 if (ieee80211_is_auth(fc
))
742 IWL_DEBUG_TX(priv
, "Sending AUTH frame\n");
743 else if (ieee80211_is_assoc_req(fc
))
744 IWL_DEBUG_TX(priv
, "Sending ASSOC frame\n");
745 else if (ieee80211_is_reassoc_req(fc
))
746 IWL_DEBUG_TX(priv
, "Sending REASSOC frame\n");
749 /* drop all non-injected data frame if we are not associated */
750 if (ieee80211_is_data(fc
) &&
751 !(info
->flags
& IEEE80211_TX_CTL_INJECTED
) &&
752 (!iwl_is_associated(priv
) ||
753 ((priv
->iw_mode
== NL80211_IFTYPE_STATION
) && !priv
->assoc_id
) ||
754 !priv
->assoc_station_added
)) {
755 IWL_DEBUG_DROP(priv
, "Dropping - !iwl_is_associated\n");
759 hdr_len
= ieee80211_hdrlen(fc
);
761 /* Find (or create) index into station table for destination station */
762 if (info
->flags
& IEEE80211_TX_CTL_INJECTED
)
763 sta_id
= priv
->hw_params
.bcast_sta_id
;
765 sta_id
= iwl_get_sta_id(priv
, hdr
);
766 if (sta_id
== IWL_INVALID_STATION
) {
767 IWL_DEBUG_DROP(priv
, "Dropping - INVALID STATION: %pM\n",
772 IWL_DEBUG_TX(priv
, "station Id %d\n", sta_id
);
775 sta_priv
= (void *)sta
->drv_priv
;
777 if (sta_priv
&& sta_id
!= priv
->hw_params
.bcast_sta_id
&&
779 WARN_ON(!(info
->flags
& IEEE80211_TX_CTL_PSPOLL_RESPONSE
));
781 * This sends an asynchronous command to the device,
782 * but we can rely on it being processed before the
783 * next frame is processed -- and the next frame to
784 * this station is the one that will consume this
786 * For now set the counter to just 1 since we do not
789 iwl_sta_modify_sleep_tx_count(priv
, sta_id
, 1);
792 txq_id
= skb_get_queue_mapping(skb
);
793 if (ieee80211_is_data_qos(fc
)) {
794 qc
= ieee80211_get_qos_ctl(hdr
);
795 tid
= qc
[0] & IEEE80211_QOS_CTL_TID_MASK
;
796 if (unlikely(tid
>= MAX_TID_COUNT
))
798 seq_number
= priv
->stations
[sta_id
].tid
[tid
].seq_number
;
799 seq_number
&= IEEE80211_SCTL_SEQ
;
800 hdr
->seq_ctrl
= hdr
->seq_ctrl
&
801 cpu_to_le16(IEEE80211_SCTL_FRAG
);
802 hdr
->seq_ctrl
|= cpu_to_le16(seq_number
);
804 /* aggregation is on for this <sta,tid> */
805 if (info
->flags
& IEEE80211_TX_CTL_AMPDU
&&
806 priv
->stations
[sta_id
].tid
[tid
].agg
.state
== IWL_AGG_ON
) {
807 txq_id
= priv
->stations
[sta_id
].tid
[tid
].agg
.txq_id
;
811 txq
= &priv
->txq
[txq_id
];
812 swq_id
= txq
->swq_id
;
815 if (unlikely(iwl_queue_space(q
) < q
->high_mark
))
818 if (ieee80211_is_data_qos(fc
))
819 priv
->stations
[sta_id
].tid
[tid
].tfds_in_queue
++;
821 /* Set up driver data for this TFD */
822 memset(&(txq
->txb
[q
->write_ptr
]), 0, sizeof(struct iwl_tx_info
));
823 txq
->txb
[q
->write_ptr
].skb
[0] = skb
;
825 /* Set up first empty entry in queue's array of Tx/cmd buffers */
826 out_cmd
= txq
->cmd
[q
->write_ptr
];
827 out_meta
= &txq
->meta
[q
->write_ptr
];
828 tx_cmd
= &out_cmd
->cmd
.tx
;
829 memset(&out_cmd
->hdr
, 0, sizeof(out_cmd
->hdr
));
830 memset(tx_cmd
, 0, sizeof(struct iwl_tx_cmd
));
833 * Set up the Tx-command (not MAC!) header.
834 * Store the chosen Tx queue and TFD index within the sequence field;
835 * after Tx, uCode's Tx response will return this value so driver can
836 * locate the frame within the tx queue and do post-tx processing.
838 out_cmd
->hdr
.cmd
= REPLY_TX
;
839 out_cmd
->hdr
.sequence
= cpu_to_le16((u16
)(QUEUE_TO_SEQ(txq_id
) |
840 INDEX_TO_SEQ(q
->write_ptr
)));
842 /* Copy MAC header from skb into command buffer */
843 memcpy(tx_cmd
->hdr
, hdr
, hdr_len
);
846 /* Total # bytes to be transmitted */
848 tx_cmd
->len
= cpu_to_le16(len
);
850 if (info
->control
.hw_key
)
851 iwl_tx_cmd_build_hwcrypto(priv
, info
, tx_cmd
, skb
, sta_id
);
853 /* TODO need this for burst mode later on */
854 iwl_tx_cmd_build_basic(priv
, tx_cmd
, info
, hdr
, sta_id
);
855 iwl_dbg_log_tx_data_frame(priv
, len
, hdr
);
857 /* set is_hcca to 0; it probably will never be implemented */
858 iwl_tx_cmd_build_rate(priv
, tx_cmd
, info
, fc
, 0);
860 iwl_update_stats(priv
, true, fc
, len
);
862 * Use the first empty entry in this queue's command buffer array
863 * to contain the Tx command and MAC header concatenated together
864 * (payload data will be in another buffer).
865 * Size of this varies, due to varying MAC header length.
866 * If end is not dword aligned, we'll have 2 extra bytes at the end
867 * of the MAC header (device reads on dword boundaries).
868 * We'll tell device about this padding later.
870 len
= sizeof(struct iwl_tx_cmd
) +
871 sizeof(struct iwl_cmd_header
) + hdr_len
;
874 firstlen
= len
= (len
+ 3) & ~3;
881 /* Tell NIC about any 2-byte padding after MAC header */
883 tx_cmd
->tx_flags
|= TX_CMD_FLG_MH_PAD_MSK
;
885 /* Physical address of this Tx command's header (not MAC header!),
886 * within command buffer array. */
887 txcmd_phys
= pci_map_single(priv
->pci_dev
,
889 PCI_DMA_BIDIRECTIONAL
);
890 pci_unmap_addr_set(out_meta
, mapping
, txcmd_phys
);
891 pci_unmap_len_set(out_meta
, len
, len
);
892 /* Add buffer containing Tx command and MAC(!) header to TFD's
894 priv
->cfg
->ops
->lib
->txq_attach_buf_to_tfd(priv
, txq
,
895 txcmd_phys
, len
, 1, 0);
897 if (!ieee80211_has_morefrags(hdr
->frame_control
)) {
898 txq
->need_update
= 1;
900 priv
->stations
[sta_id
].tid
[tid
].seq_number
= seq_number
;
903 txq
->need_update
= 0;
906 /* Set up TFD's 2nd entry to point directly to remainder of skb,
907 * if any (802.11 null frames have no payload). */
908 secondlen
= len
= skb
->len
- hdr_len
;
910 phys_addr
= pci_map_single(priv
->pci_dev
, skb
->data
+ hdr_len
,
911 len
, PCI_DMA_TODEVICE
);
912 priv
->cfg
->ops
->lib
->txq_attach_buf_to_tfd(priv
, txq
,
917 scratch_phys
= txcmd_phys
+ sizeof(struct iwl_cmd_header
) +
918 offsetof(struct iwl_tx_cmd
, scratch
);
920 len
= sizeof(struct iwl_tx_cmd
) +
921 sizeof(struct iwl_cmd_header
) + hdr_len
;
922 /* take back ownership of DMA buffer to enable update */
923 pci_dma_sync_single_for_cpu(priv
->pci_dev
, txcmd_phys
,
924 len
, PCI_DMA_BIDIRECTIONAL
);
925 tx_cmd
->dram_lsb_ptr
= cpu_to_le32(scratch_phys
);
926 tx_cmd
->dram_msb_ptr
= iwl_get_dma_hi_addr(scratch_phys
);
928 IWL_DEBUG_TX(priv
, "sequence nr = 0X%x \n",
929 le16_to_cpu(out_cmd
->hdr
.sequence
));
930 IWL_DEBUG_TX(priv
, "tx_flags = 0X%x \n", le32_to_cpu(tx_cmd
->tx_flags
));
931 iwl_print_hex_dump(priv
, IWL_DL_TX
, (u8
*)tx_cmd
, sizeof(*tx_cmd
));
932 iwl_print_hex_dump(priv
, IWL_DL_TX
, (u8
*)tx_cmd
->hdr
, hdr_len
);
934 /* Set up entry for this TFD in Tx byte-count array */
935 if (info
->flags
& IEEE80211_TX_CTL_AMPDU
)
936 priv
->cfg
->ops
->lib
->txq_update_byte_cnt_tbl(priv
, txq
,
937 le16_to_cpu(tx_cmd
->len
));
939 pci_dma_sync_single_for_device(priv
->pci_dev
, txcmd_phys
,
940 len
, PCI_DMA_BIDIRECTIONAL
);
942 trace_iwlwifi_dev_tx(priv
,
943 &((struct iwl_tfd
*)txq
->tfds
)[txq
->q
.write_ptr
],
944 sizeof(struct iwl_tfd
),
945 &out_cmd
->hdr
, firstlen
,
946 skb
->data
+ hdr_len
, secondlen
);
948 /* Tell device the write index *just past* this latest filled TFD */
949 q
->write_ptr
= iwl_queue_inc_wrap(q
->write_ptr
, q
->n_bd
);
950 iwl_txq_update_write_ptr(priv
, txq
);
951 spin_unlock_irqrestore(&priv
->lock
, flags
);
954 * At this point the frame is "transmitted" successfully
955 * and we will get a TX status notification eventually,
956 * regardless of the value of ret. "ret" only indicates
957 * whether or not we should update the write pointer.
960 /* avoid atomic ops if it isn't an associated client */
961 if (sta_priv
&& sta_priv
->client
)
962 atomic_inc(&sta_priv
->pending_frames
);
964 if ((iwl_queue_space(q
) < q
->high_mark
) && priv
->mac80211_registered
) {
965 if (wait_write_ptr
) {
966 spin_lock_irqsave(&priv
->lock
, flags
);
967 txq
->need_update
= 1;
968 iwl_txq_update_write_ptr(priv
, txq
);
969 spin_unlock_irqrestore(&priv
->lock
, flags
);
971 iwl_stop_queue(priv
, txq
->swq_id
);
978 spin_unlock_irqrestore(&priv
->lock
, flags
);
981 EXPORT_SYMBOL(iwl_tx_skb
);
983 /*************** HOST COMMAND QUEUE FUNCTIONS *****/
986 * iwl_enqueue_hcmd - enqueue a uCode command
987 * @priv: device private data point
988 * @cmd: a point to the ucode command structure
990 * The function returns < 0 values to indicate the operation is
991 * failed. On success, it turns the index (> 0) of command in the
994 int iwl_enqueue_hcmd(struct iwl_priv
*priv
, struct iwl_host_cmd
*cmd
)
996 struct iwl_tx_queue
*txq
= &priv
->txq
[IWL_CMD_QUEUE_NUM
];
997 struct iwl_queue
*q
= &txq
->q
;
998 struct iwl_device_cmd
*out_cmd
;
999 struct iwl_cmd_meta
*out_meta
;
1000 dma_addr_t phys_addr
;
1001 unsigned long flags
;
1006 cmd
->len
= priv
->cfg
->ops
->utils
->get_hcmd_size(cmd
->id
, cmd
->len
);
1007 fix_size
= (u16
)(cmd
->len
+ sizeof(out_cmd
->hdr
));
1009 /* If any of the command structures end up being larger than
1010 * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
1011 * we will need to increase the size of the TFD entries */
1012 BUG_ON((fix_size
> TFD_MAX_PAYLOAD_SIZE
) &&
1013 !(cmd
->flags
& CMD_SIZE_HUGE
));
1015 if (iwl_is_rfkill(priv
) || iwl_is_ctkill(priv
)) {
1016 IWL_WARN(priv
, "Not sending command - %s KILL\n",
1017 iwl_is_rfkill(priv
) ? "RF" : "CT");
1021 if (iwl_queue_space(q
) < ((cmd
->flags
& CMD_ASYNC
) ? 2 : 1)) {
1022 IWL_ERR(priv
, "No space in command queue\n");
1023 if (iwl_within_ct_kill_margin(priv
))
1024 iwl_tt_enter_ct_kill(priv
);
1026 IWL_ERR(priv
, "Restarting adapter due to queue full\n");
1027 queue_work(priv
->workqueue
, &priv
->restart
);
1032 spin_lock_irqsave(&priv
->hcmd_lock
, flags
);
1034 idx
= get_cmd_index(q
, q
->write_ptr
, cmd
->flags
& CMD_SIZE_HUGE
);
1035 out_cmd
= txq
->cmd
[idx
];
1036 out_meta
= &txq
->meta
[idx
];
1038 memset(out_meta
, 0, sizeof(*out_meta
)); /* re-initialize to NULL */
1039 out_meta
->flags
= cmd
->flags
;
1040 if (cmd
->flags
& CMD_WANT_SKB
)
1041 out_meta
->source
= cmd
;
1042 if (cmd
->flags
& CMD_ASYNC
)
1043 out_meta
->callback
= cmd
->callback
;
1045 out_cmd
->hdr
.cmd
= cmd
->id
;
1046 memcpy(&out_cmd
->cmd
.payload
, cmd
->data
, cmd
->len
);
1048 /* At this point, the out_cmd now has all of the incoming cmd
1051 out_cmd
->hdr
.flags
= 0;
1052 out_cmd
->hdr
.sequence
= cpu_to_le16(QUEUE_TO_SEQ(IWL_CMD_QUEUE_NUM
) |
1053 INDEX_TO_SEQ(q
->write_ptr
));
1054 if (cmd
->flags
& CMD_SIZE_HUGE
)
1055 out_cmd
->hdr
.sequence
|= SEQ_HUGE_FRAME
;
1056 len
= sizeof(struct iwl_device_cmd
);
1057 len
+= (idx
== TFD_CMD_SLOTS
) ? IWL_MAX_SCAN_SIZE
: 0;
1060 #ifdef CONFIG_IWLWIFI_DEBUG
1061 switch (out_cmd
->hdr
.cmd
) {
1062 case REPLY_TX_LINK_QUALITY_CMD
:
1063 case SENSITIVITY_CMD
:
1064 IWL_DEBUG_HC_DUMP(priv
, "Sending command %s (#%x), seq: 0x%04X, "
1065 "%d bytes at %d[%d]:%d\n",
1066 get_cmd_string(out_cmd
->hdr
.cmd
),
1068 le16_to_cpu(out_cmd
->hdr
.sequence
), fix_size
,
1069 q
->write_ptr
, idx
, IWL_CMD_QUEUE_NUM
);
1072 IWL_DEBUG_HC(priv
, "Sending command %s (#%x), seq: 0x%04X, "
1073 "%d bytes at %d[%d]:%d\n",
1074 get_cmd_string(out_cmd
->hdr
.cmd
),
1076 le16_to_cpu(out_cmd
->hdr
.sequence
), fix_size
,
1077 q
->write_ptr
, idx
, IWL_CMD_QUEUE_NUM
);
1080 txq
->need_update
= 1;
1082 if (priv
->cfg
->ops
->lib
->txq_update_byte_cnt_tbl
)
1083 /* Set up entry in queue's byte count circular buffer */
1084 priv
->cfg
->ops
->lib
->txq_update_byte_cnt_tbl(priv
, txq
, 0);
1086 phys_addr
= pci_map_single(priv
->pci_dev
, &out_cmd
->hdr
,
1087 fix_size
, PCI_DMA_BIDIRECTIONAL
);
1088 pci_unmap_addr_set(out_meta
, mapping
, phys_addr
);
1089 pci_unmap_len_set(out_meta
, len
, fix_size
);
1091 trace_iwlwifi_dev_hcmd(priv
, &out_cmd
->hdr
, fix_size
, cmd
->flags
);
1093 priv
->cfg
->ops
->lib
->txq_attach_buf_to_tfd(priv
, txq
,
1094 phys_addr
, fix_size
, 1,
1097 /* Increment and update queue's write index */
1098 q
->write_ptr
= iwl_queue_inc_wrap(q
->write_ptr
, q
->n_bd
);
1099 iwl_txq_update_write_ptr(priv
, txq
);
1101 spin_unlock_irqrestore(&priv
->hcmd_lock
, flags
);
1105 static void iwl_tx_status(struct iwl_priv
*priv
, struct sk_buff
*skb
)
1107 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
1108 struct ieee80211_sta
*sta
;
1109 struct iwl_station_priv
*sta_priv
;
1111 sta
= ieee80211_find_sta(priv
->vif
, hdr
->addr1
);
1113 sta_priv
= (void *)sta
->drv_priv
;
1114 /* avoid atomic ops if this isn't a client */
1115 if (sta_priv
->client
&&
1116 atomic_dec_return(&sta_priv
->pending_frames
) == 0)
1117 ieee80211_sta_block_awake(priv
->hw
, sta
, false);
1120 ieee80211_tx_status_irqsafe(priv
->hw
, skb
);
1123 int iwl_tx_queue_reclaim(struct iwl_priv
*priv
, int txq_id
, int index
)
1125 struct iwl_tx_queue
*txq
= &priv
->txq
[txq_id
];
1126 struct iwl_queue
*q
= &txq
->q
;
1127 struct iwl_tx_info
*tx_info
;
1130 if ((index
>= q
->n_bd
) || (iwl_queue_used(q
, index
) == 0)) {
1131 IWL_ERR(priv
, "Read index for DMA queue txq id (%d), index %d, "
1132 "is out of range [0-%d] %d %d.\n", txq_id
,
1133 index
, q
->n_bd
, q
->write_ptr
, q
->read_ptr
);
1137 for (index
= iwl_queue_inc_wrap(index
, q
->n_bd
);
1138 q
->read_ptr
!= index
;
1139 q
->read_ptr
= iwl_queue_inc_wrap(q
->read_ptr
, q
->n_bd
)) {
1141 tx_info
= &txq
->txb
[txq
->q
.read_ptr
];
1142 iwl_tx_status(priv
, tx_info
->skb
[0]);
1143 tx_info
->skb
[0] = NULL
;
1145 if (priv
->cfg
->ops
->lib
->txq_inval_byte_cnt_tbl
)
1146 priv
->cfg
->ops
->lib
->txq_inval_byte_cnt_tbl(priv
, txq
);
1148 priv
->cfg
->ops
->lib
->txq_free_tfd(priv
, txq
);
1153 EXPORT_SYMBOL(iwl_tx_queue_reclaim
);
1157 * iwl_hcmd_queue_reclaim - Reclaim TX command queue entries already Tx'd
1159 * When FW advances 'R' index, all entries between old and new 'R' index
1160 * need to be reclaimed. As result, some free space forms. If there is
1161 * enough free space (> low mark), wake the stack that feeds us.
1163 static void iwl_hcmd_queue_reclaim(struct iwl_priv
*priv
, int txq_id
,
1164 int idx
, int cmd_idx
)
1166 struct iwl_tx_queue
*txq
= &priv
->txq
[txq_id
];
1167 struct iwl_queue
*q
= &txq
->q
;
1170 if ((idx
>= q
->n_bd
) || (iwl_queue_used(q
, idx
) == 0)) {
1171 IWL_ERR(priv
, "Read index for DMA queue txq id (%d), index %d, "
1172 "is out of range [0-%d] %d %d.\n", txq_id
,
1173 idx
, q
->n_bd
, q
->write_ptr
, q
->read_ptr
);
1177 for (idx
= iwl_queue_inc_wrap(idx
, q
->n_bd
); q
->read_ptr
!= idx
;
1178 q
->read_ptr
= iwl_queue_inc_wrap(q
->read_ptr
, q
->n_bd
)) {
1181 IWL_ERR(priv
, "HCMD skipped: index (%d) %d %d\n", idx
,
1182 q
->write_ptr
, q
->read_ptr
);
1183 queue_work(priv
->workqueue
, &priv
->restart
);
1190 * iwl_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
1191 * @rxb: Rx buffer to reclaim
1193 * If an Rx buffer has an async callback associated with it the callback
1194 * will be executed. The attached skb (if present) will only be freed
1195 * if the callback returns 1
1197 void iwl_tx_cmd_complete(struct iwl_priv
*priv
, struct iwl_rx_mem_buffer
*rxb
)
1199 struct iwl_rx_packet
*pkt
= rxb_addr(rxb
);
1200 u16 sequence
= le16_to_cpu(pkt
->hdr
.sequence
);
1201 int txq_id
= SEQ_TO_QUEUE(sequence
);
1202 int index
= SEQ_TO_INDEX(sequence
);
1204 bool huge
= !!(pkt
->hdr
.sequence
& SEQ_HUGE_FRAME
);
1205 struct iwl_device_cmd
*cmd
;
1206 struct iwl_cmd_meta
*meta
;
1208 /* If a Tx command is being handled and it isn't in the actual
1209 * command queue then there a command routing bug has been introduced
1210 * in the queue management code. */
1211 if (WARN(txq_id
!= IWL_CMD_QUEUE_NUM
,
1212 "wrong command queue %d, sequence 0x%X readp=%d writep=%d\n",
1214 priv
->txq
[IWL_CMD_QUEUE_NUM
].q
.read_ptr
,
1215 priv
->txq
[IWL_CMD_QUEUE_NUM
].q
.write_ptr
)) {
1216 iwl_print_hex_error(priv
, pkt
, 32);
1220 cmd_index
= get_cmd_index(&priv
->txq
[IWL_CMD_QUEUE_NUM
].q
, index
, huge
);
1221 cmd
= priv
->txq
[IWL_CMD_QUEUE_NUM
].cmd
[cmd_index
];
1222 meta
= &priv
->txq
[IWL_CMD_QUEUE_NUM
].meta
[cmd_index
];
1224 pci_unmap_single(priv
->pci_dev
,
1225 pci_unmap_addr(meta
, mapping
),
1226 pci_unmap_len(meta
, len
),
1227 PCI_DMA_BIDIRECTIONAL
);
1229 /* Input error checking is done when commands are added to queue. */
1230 if (meta
->flags
& CMD_WANT_SKB
) {
1231 meta
->source
->reply_page
= (unsigned long)rxb_addr(rxb
);
1233 } else if (meta
->callback
)
1234 meta
->callback(priv
, cmd
, pkt
);
1236 iwl_hcmd_queue_reclaim(priv
, txq_id
, index
, cmd_index
);
1238 if (!(meta
->flags
& CMD_ASYNC
)) {
1239 clear_bit(STATUS_HCMD_ACTIVE
, &priv
->status
);
1240 wake_up_interruptible(&priv
->wait_command_queue
);
1243 EXPORT_SYMBOL(iwl_tx_cmd_complete
);
1246 * Find first available (lowest unused) Tx Queue, mark it "active".
1247 * Called only when finding queue for aggregation.
1248 * Should never return anything < 7, because they should already
1249 * be in use as EDCA AC (0-3), Command (4), HCCA (5, 6).
1251 static int iwl_txq_ctx_activate_free(struct iwl_priv
*priv
)
1255 for (txq_id
= 0; txq_id
< priv
->hw_params
.max_txq_num
; txq_id
++)
1256 if (!test_and_set_bit(txq_id
, &priv
->txq_ctx_active_msk
))
1261 int iwl_tx_agg_start(struct iwl_priv
*priv
, const u8
*ra
, u16 tid
, u16
*ssn
)
1267 unsigned long flags
;
1268 struct iwl_tid_data
*tid_data
;
1270 if (likely(tid
< ARRAY_SIZE(default_tid_to_tx_fifo
)))
1271 tx_fifo
= default_tid_to_tx_fifo
[tid
];
1275 IWL_WARN(priv
, "%s on ra = %pM tid = %d\n",
1278 sta_id
= iwl_find_station(priv
, ra
);
1279 if (sta_id
== IWL_INVALID_STATION
) {
1280 IWL_ERR(priv
, "Start AGG on invalid station\n");
1283 if (unlikely(tid
>= MAX_TID_COUNT
))
1286 if (priv
->stations
[sta_id
].tid
[tid
].agg
.state
!= IWL_AGG_OFF
) {
1287 IWL_ERR(priv
, "Start AGG when state is not IWL_AGG_OFF !\n");
1291 txq_id
= iwl_txq_ctx_activate_free(priv
);
1293 IWL_ERR(priv
, "No free aggregation queue available\n");
1297 spin_lock_irqsave(&priv
->sta_lock
, flags
);
1298 tid_data
= &priv
->stations
[sta_id
].tid
[tid
];
1299 *ssn
= SEQ_TO_SN(tid_data
->seq_number
);
1300 tid_data
->agg
.txq_id
= txq_id
;
1301 priv
->txq
[txq_id
].swq_id
= iwl_virtual_agg_queue_num(tx_fifo
, txq_id
);
1302 spin_unlock_irqrestore(&priv
->sta_lock
, flags
);
1304 ret
= priv
->cfg
->ops
->lib
->txq_agg_enable(priv
, txq_id
, tx_fifo
,
1309 if (tid_data
->tfds_in_queue
== 0) {
1310 IWL_DEBUG_HT(priv
, "HW queue is empty\n");
1311 tid_data
->agg
.state
= IWL_AGG_ON
;
1312 ieee80211_start_tx_ba_cb_irqsafe(priv
->vif
, ra
, tid
);
1314 IWL_DEBUG_HT(priv
, "HW queue is NOT empty: %d packets in HW queue\n",
1315 tid_data
->tfds_in_queue
);
1316 tid_data
->agg
.state
= IWL_EMPTYING_HW_QUEUE_ADDBA
;
1320 EXPORT_SYMBOL(iwl_tx_agg_start
);
1322 int iwl_tx_agg_stop(struct iwl_priv
*priv
, const u8
*ra
, u16 tid
)
1324 int tx_fifo_id
, txq_id
, sta_id
, ssn
= -1;
1325 struct iwl_tid_data
*tid_data
;
1326 int write_ptr
, read_ptr
;
1327 unsigned long flags
;
1330 IWL_ERR(priv
, "ra = NULL\n");
1334 if (unlikely(tid
>= MAX_TID_COUNT
))
1337 if (likely(tid
< ARRAY_SIZE(default_tid_to_tx_fifo
)))
1338 tx_fifo_id
= default_tid_to_tx_fifo
[tid
];
1342 sta_id
= iwl_find_station(priv
, ra
);
1344 if (sta_id
== IWL_INVALID_STATION
) {
1345 IWL_ERR(priv
, "Invalid station for AGG tid %d\n", tid
);
1349 if (priv
->stations
[sta_id
].tid
[tid
].agg
.state
==
1350 IWL_EMPTYING_HW_QUEUE_ADDBA
) {
1351 IWL_DEBUG_HT(priv
, "AGG stop before setup done\n");
1352 ieee80211_stop_tx_ba_cb_irqsafe(priv
->vif
, ra
, tid
);
1353 priv
->stations
[sta_id
].tid
[tid
].agg
.state
= IWL_AGG_OFF
;
1357 if (priv
->stations
[sta_id
].tid
[tid
].agg
.state
!= IWL_AGG_ON
)
1358 IWL_WARN(priv
, "Stopping AGG while state not ON or starting\n");
1360 tid_data
= &priv
->stations
[sta_id
].tid
[tid
];
1361 ssn
= (tid_data
->seq_number
& IEEE80211_SCTL_SEQ
) >> 4;
1362 txq_id
= tid_data
->agg
.txq_id
;
1363 write_ptr
= priv
->txq
[txq_id
].q
.write_ptr
;
1364 read_ptr
= priv
->txq
[txq_id
].q
.read_ptr
;
1366 /* The queue is not empty */
1367 if (write_ptr
!= read_ptr
) {
1368 IWL_DEBUG_HT(priv
, "Stopping a non empty AGG HW QUEUE\n");
1369 priv
->stations
[sta_id
].tid
[tid
].agg
.state
=
1370 IWL_EMPTYING_HW_QUEUE_DELBA
;
1374 IWL_DEBUG_HT(priv
, "HW queue is empty\n");
1375 priv
->stations
[sta_id
].tid
[tid
].agg
.state
= IWL_AGG_OFF
;
1377 spin_lock_irqsave(&priv
->lock
, flags
);
1379 * the only reason this call can fail is queue number out of range,
1380 * which can happen if uCode is reloaded and all the station
1381 * information are lost. if it is outside the range, there is no need
1382 * to deactivate the uCode queue, just return "success" to allow
1383 * mac80211 to clean up it own data.
1385 priv
->cfg
->ops
->lib
->txq_agg_disable(priv
, txq_id
, ssn
,
1387 spin_unlock_irqrestore(&priv
->lock
, flags
);
1389 ieee80211_stop_tx_ba_cb_irqsafe(priv
->vif
, ra
, tid
);
1393 EXPORT_SYMBOL(iwl_tx_agg_stop
);
1395 int iwl_txq_check_empty(struct iwl_priv
*priv
, int sta_id
, u8 tid
, int txq_id
)
1397 struct iwl_queue
*q
= &priv
->txq
[txq_id
].q
;
1398 u8
*addr
= priv
->stations
[sta_id
].sta
.sta
.addr
;
1399 struct iwl_tid_data
*tid_data
= &priv
->stations
[sta_id
].tid
[tid
];
1401 switch (priv
->stations
[sta_id
].tid
[tid
].agg
.state
) {
1402 case IWL_EMPTYING_HW_QUEUE_DELBA
:
1403 /* We are reclaiming the last packet of the */
1404 /* aggregated HW queue */
1405 if ((txq_id
== tid_data
->agg
.txq_id
) &&
1406 (q
->read_ptr
== q
->write_ptr
)) {
1407 u16 ssn
= SEQ_TO_SN(tid_data
->seq_number
);
1408 int tx_fifo
= default_tid_to_tx_fifo
[tid
];
1409 IWL_DEBUG_HT(priv
, "HW queue empty: continue DELBA flow\n");
1410 priv
->cfg
->ops
->lib
->txq_agg_disable(priv
, txq_id
,
1412 tid_data
->agg
.state
= IWL_AGG_OFF
;
1413 ieee80211_stop_tx_ba_cb_irqsafe(priv
->vif
, addr
, tid
);
1416 case IWL_EMPTYING_HW_QUEUE_ADDBA
:
1417 /* We are reclaiming the last packet of the queue */
1418 if (tid_data
->tfds_in_queue
== 0) {
1419 IWL_DEBUG_HT(priv
, "HW queue empty: continue ADDBA flow\n");
1420 tid_data
->agg
.state
= IWL_AGG_ON
;
1421 ieee80211_start_tx_ba_cb_irqsafe(priv
->vif
, addr
, tid
);
1427 EXPORT_SYMBOL(iwl_txq_check_empty
);
1430 * iwl_tx_status_reply_compressed_ba - Update tx status from block-ack
1432 * Go through block-ack's bitmap of ACK'd frames, update driver's record of
1433 * ACK vs. not. This gets sent to mac80211, then to rate scaling algo.
1435 static int iwl_tx_status_reply_compressed_ba(struct iwl_priv
*priv
,
1436 struct iwl_ht_agg
*agg
,
1437 struct iwl_compressed_ba_resp
*ba_resp
)
1441 u16 seq_ctl
= le16_to_cpu(ba_resp
->seq_ctl
);
1442 u16 scd_flow
= le16_to_cpu(ba_resp
->scd_flow
);
1445 struct ieee80211_tx_info
*info
;
1447 if (unlikely(!agg
->wait_for_ba
)) {
1448 IWL_ERR(priv
, "Received BA when not expected\n");
1452 /* Mark that the expected block-ack response arrived */
1453 agg
->wait_for_ba
= 0;
1454 IWL_DEBUG_TX_REPLY(priv
, "BA %d %d\n", agg
->start_idx
, ba_resp
->seq_ctl
);
1456 /* Calculate shift to align block-ack bits with our Tx window bits */
1457 sh
= agg
->start_idx
- SEQ_TO_INDEX(seq_ctl
>> 4);
1458 if (sh
< 0) /* tbw something is wrong with indices */
1461 /* don't use 64-bit values for now */
1462 bitmap
= le64_to_cpu(ba_resp
->bitmap
) >> sh
;
1464 if (agg
->frame_count
> (64 - sh
)) {
1465 IWL_DEBUG_TX_REPLY(priv
, "more frames than bitmap size");
1469 /* check for success or failure according to the
1470 * transmitted bitmap and block-ack bitmap */
1471 bitmap
&= agg
->bitmap
;
1473 /* For each frame attempted in aggregation,
1474 * update driver's record of tx frame's status. */
1475 for (i
= 0; i
< agg
->frame_count
; i
++) {
1476 ack
= bitmap
& (1ULL << i
);
1478 IWL_DEBUG_TX_REPLY(priv
, "%s ON i=%d idx=%d raw=%d\n",
1479 ack
? "ACK" : "NACK", i
, (agg
->start_idx
+ i
) & 0xff,
1480 agg
->start_idx
+ i
);
1483 info
= IEEE80211_SKB_CB(priv
->txq
[scd_flow
].txb
[agg
->start_idx
].skb
[0]);
1484 memset(&info
->status
, 0, sizeof(info
->status
));
1485 info
->flags
|= IEEE80211_TX_STAT_ACK
;
1486 info
->flags
|= IEEE80211_TX_STAT_AMPDU
;
1487 info
->status
.ampdu_ack_map
= successes
;
1488 info
->status
.ampdu_ack_len
= agg
->frame_count
;
1489 iwl_hwrate_to_tx_control(priv
, agg
->rate_n_flags
, info
);
1491 IWL_DEBUG_TX_REPLY(priv
, "Bitmap %llx\n", (unsigned long long)bitmap
);
1497 * iwl_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
1499 * Handles block-acknowledge notification from device, which reports success
1500 * of frames sent via aggregation.
1502 void iwl_rx_reply_compressed_ba(struct iwl_priv
*priv
,
1503 struct iwl_rx_mem_buffer
*rxb
)
1505 struct iwl_rx_packet
*pkt
= rxb_addr(rxb
);
1506 struct iwl_compressed_ba_resp
*ba_resp
= &pkt
->u
.compressed_ba
;
1507 struct iwl_tx_queue
*txq
= NULL
;
1508 struct iwl_ht_agg
*agg
;
1513 /* "flow" corresponds to Tx queue */
1514 u16 scd_flow
= le16_to_cpu(ba_resp
->scd_flow
);
1516 /* "ssn" is start of block-ack Tx window, corresponds to index
1517 * (in Tx queue's circular buffer) of first TFD/frame in window */
1518 u16 ba_resp_scd_ssn
= le16_to_cpu(ba_resp
->scd_ssn
);
1520 if (scd_flow
>= priv
->hw_params
.max_txq_num
) {
1522 "BUG_ON scd_flow is bigger than number of queues\n");
1526 txq
= &priv
->txq
[scd_flow
];
1527 sta_id
= ba_resp
->sta_id
;
1529 agg
= &priv
->stations
[sta_id
].tid
[tid
].agg
;
1531 /* Find index just before block-ack window */
1532 index
= iwl_queue_dec_wrap(ba_resp_scd_ssn
& 0xff, txq
->q
.n_bd
);
1534 /* TODO: Need to get this copy more safely - now good for debug */
1536 IWL_DEBUG_TX_REPLY(priv
, "REPLY_COMPRESSED_BA [%d] Received from %pM, "
1539 (u8
*) &ba_resp
->sta_addr_lo32
,
1541 IWL_DEBUG_TX_REPLY(priv
, "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = "
1542 "%d, scd_ssn = %d\n",
1545 (unsigned long long)le64_to_cpu(ba_resp
->bitmap
),
1548 IWL_DEBUG_TX_REPLY(priv
, "DAT start_idx = %d, bitmap = 0x%llx \n",
1550 (unsigned long long)agg
->bitmap
);
1552 /* Update driver's record of ACK vs. not for each frame in window */
1553 iwl_tx_status_reply_compressed_ba(priv
, agg
, ba_resp
);
1555 /* Release all TFDs before the SSN, i.e. all TFDs in front of
1556 * block-ack window (we assume that they've been successfully
1557 * transmitted ... if not, it's too late anyway). */
1558 if (txq
->q
.read_ptr
!= (ba_resp_scd_ssn
& 0xff)) {
1559 /* calculate mac80211 ampdu sw queue to wake */
1560 int freed
= iwl_tx_queue_reclaim(priv
, scd_flow
, index
);
1561 priv
->stations
[sta_id
].tid
[tid
].tfds_in_queue
-= freed
;
1563 if ((iwl_queue_space(&txq
->q
) > txq
->q
.low_mark
) &&
1564 priv
->mac80211_registered
&&
1565 (agg
->state
!= IWL_EMPTYING_HW_QUEUE_DELBA
))
1566 iwl_wake_queue(priv
, txq
->swq_id
);
1568 iwl_txq_check_empty(priv
, sta_id
, tid
, scd_flow
);
1571 EXPORT_SYMBOL(iwl_rx_reply_compressed_ba
);
1573 #ifdef CONFIG_IWLWIFI_DEBUG
1574 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
1576 const char *iwl_get_tx_fail_reason(u32 status
)
1578 switch (status
& TX_STATUS_MSK
) {
1579 case TX_STATUS_SUCCESS
:
1581 TX_STATUS_ENTRY(SHORT_LIMIT
);
1582 TX_STATUS_ENTRY(LONG_LIMIT
);
1583 TX_STATUS_ENTRY(FIFO_UNDERRUN
);
1584 TX_STATUS_ENTRY(MGMNT_ABORT
);
1585 TX_STATUS_ENTRY(NEXT_FRAG
);
1586 TX_STATUS_ENTRY(LIFE_EXPIRE
);
1587 TX_STATUS_ENTRY(DEST_PS
);
1588 TX_STATUS_ENTRY(ABORTED
);
1589 TX_STATUS_ENTRY(BT_RETRY
);
1590 TX_STATUS_ENTRY(STA_INVALID
);
1591 TX_STATUS_ENTRY(FRAG_DROPPED
);
1592 TX_STATUS_ENTRY(TID_DISABLE
);
1593 TX_STATUS_ENTRY(FRAME_FLUSHED
);
1594 TX_STATUS_ENTRY(INSUFFICIENT_CF_POLL
);
1595 TX_STATUS_ENTRY(TX_LOCKED
);
1596 TX_STATUS_ENTRY(NO_BEACON_ON_RADAR
);
1601 EXPORT_SYMBOL(iwl_get_tx_fail_reason
);
1602 #endif /* CONFIG_IWLWIFI_DEBUG */