1 /******************************************************************************
3 * Copyright(c) 2003 - 2011 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 *****************************************************************************/
29 #include <linux/etherdevice.h>
30 #include <linux/slab.h>
31 #include <linux/sched.h>
32 #include <net/mac80211.h>
38 #include "iwl-helpers.h"
39 #include "iwl-trans-int-pcie.h"
42 * iwl_trans_txq_update_byte_cnt_tbl - Set up entry in Tx byte-count array
44 void iwl_trans_txq_update_byte_cnt_tbl(struct iwl_trans *trans,
45 struct iwl_tx_queue *txq,
48 struct iwlagn_scd_bc_tbl *scd_bc_tbl;
49 struct iwl_trans_pcie *trans_pcie =
50 IWL_TRANS_GET_PCIE_TRANS(trans);
51 int write_ptr = txq->q.write_ptr;
52 int txq_id = txq->q.id;
55 u16 len = byte_cnt + IWL_TX_CRC_SIZE + IWL_TX_DELIMITER_SIZE;
58 scd_bc_tbl = trans_pcie->scd_bc_tbls.addr;
60 WARN_ON(len > 0xFFF || write_ptr >= TFD_QUEUE_SIZE_MAX);
62 sta_id = txq->cmd[txq->q.write_ptr]->cmd.tx.sta_id;
63 sec_ctl = txq->cmd[txq->q.write_ptr]->cmd.tx.sec_ctl;
65 switch (sec_ctl & TX_CMD_SEC_MSK) {
73 len += WEP_IV_LEN + WEP_ICV_LEN;
77 bc_ent = cpu_to_le16((len & 0xFFF) | (sta_id << 12));
79 scd_bc_tbl[txq_id].tfd_offset[write_ptr] = bc_ent;
81 if (write_ptr < TFD_QUEUE_SIZE_BC_DUP)
83 tfd_offset[TFD_QUEUE_SIZE_MAX + write_ptr] = bc_ent;
87 * iwl_txq_update_write_ptr - Send new write index to hardware
89 void iwl_txq_update_write_ptr(struct iwl_trans *trans, struct iwl_tx_queue *txq)
92 int txq_id = txq->q.id;
94 if (txq->need_update == 0)
97 if (hw_params(trans).shadow_reg_enable) {
98 /* shadow register enabled */
99 iwl_write32(bus(trans), HBUS_TARG_WRPTR,
100 txq->q.write_ptr | (txq_id << 8));
102 /* if we're trying to save power */
103 if (test_bit(STATUS_POWER_PMI, &trans->shrd->status)) {
104 /* wake up nic if it's powered down ...
105 * uCode will wake up, and interrupt us again, so next
106 * time we'll skip this part. */
107 reg = iwl_read32(bus(trans), CSR_UCODE_DRV_GP1);
109 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
110 IWL_DEBUG_INFO(trans,
111 "Tx queue %d requesting wakeup,"
112 " GP1 = 0x%x\n", txq_id, reg);
113 iwl_set_bit(bus(trans), CSR_GP_CNTRL,
114 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
118 iwl_write_direct32(bus(trans), HBUS_TARG_WRPTR,
119 txq->q.write_ptr | (txq_id << 8));
122 * else not in power-save mode,
123 * uCode will never sleep when we're
124 * trying to tx (during RFKILL, we're not trying to tx).
127 iwl_write32(bus(trans), HBUS_TARG_WRPTR,
128 txq->q.write_ptr | (txq_id << 8));
130 txq->need_update = 0;
133 static inline dma_addr_t iwl_tfd_tb_get_addr(struct iwl_tfd *tfd, u8 idx)
135 struct iwl_tfd_tb *tb = &tfd->tbs[idx];
137 dma_addr_t addr = get_unaligned_le32(&tb->lo);
138 if (sizeof(dma_addr_t) > sizeof(u32))
140 ((dma_addr_t)(le16_to_cpu(tb->hi_n_len) & 0xF) << 16) << 16;
145 static inline u16 iwl_tfd_tb_get_len(struct iwl_tfd *tfd, u8 idx)
147 struct iwl_tfd_tb *tb = &tfd->tbs[idx];
149 return le16_to_cpu(tb->hi_n_len) >> 4;
152 static inline void iwl_tfd_set_tb(struct iwl_tfd *tfd, u8 idx,
153 dma_addr_t addr, u16 len)
155 struct iwl_tfd_tb *tb = &tfd->tbs[idx];
156 u16 hi_n_len = len << 4;
158 put_unaligned_le32(addr, &tb->lo);
159 if (sizeof(dma_addr_t) > sizeof(u32))
160 hi_n_len |= ((addr >> 16) >> 16) & 0xF;
162 tb->hi_n_len = cpu_to_le16(hi_n_len);
164 tfd->num_tbs = idx + 1;
167 static inline u8 iwl_tfd_get_num_tbs(struct iwl_tfd *tfd)
169 return tfd->num_tbs & 0x1f;
172 static void iwlagn_unmap_tfd(struct iwl_trans *trans, struct iwl_cmd_meta *meta,
173 struct iwl_tfd *tfd, enum dma_data_direction dma_dir)
178 /* Sanity check on number of chunks */
179 num_tbs = iwl_tfd_get_num_tbs(tfd);
181 if (num_tbs >= IWL_NUM_OF_TBS) {
182 IWL_ERR(trans, "Too many chunks: %i\n", num_tbs);
183 /* @todo issue fatal error, it is quite serious situation */
189 dma_unmap_single(bus(trans)->dev,
190 dma_unmap_addr(meta, mapping),
191 dma_unmap_len(meta, len),
194 /* Unmap chunks, if any. */
195 for (i = 1; i < num_tbs; i++)
196 dma_unmap_single(bus(trans)->dev, iwl_tfd_tb_get_addr(tfd, i),
197 iwl_tfd_tb_get_len(tfd, i), dma_dir);
201 * iwlagn_txq_free_tfd - Free all chunks referenced by TFD [txq->q.read_ptr]
202 * @trans - transport private data
204 * @index - the index of the TFD to be freed
206 * Does NOT advance any TFD circular buffer read/write indexes
207 * Does NOT free the TFD itself (which is within circular buffer)
209 void iwlagn_txq_free_tfd(struct iwl_trans *trans, struct iwl_tx_queue *txq,
212 struct iwl_tfd *tfd_tmp = txq->tfds;
214 iwlagn_unmap_tfd(trans, &txq->meta[index], &tfd_tmp[index],
221 skb = txq->skbs[index];
223 /* can be called from irqs-disabled context */
225 dev_kfree_skb_any(skb);
226 txq->skbs[index] = NULL;
231 int iwlagn_txq_attach_buf_to_tfd(struct iwl_trans *trans,
232 struct iwl_tx_queue *txq,
233 dma_addr_t addr, u16 len,
237 struct iwl_tfd *tfd, *tfd_tmp;
242 tfd = &tfd_tmp[q->write_ptr];
245 memset(tfd, 0, sizeof(*tfd));
247 num_tbs = iwl_tfd_get_num_tbs(tfd);
249 /* Each TFD can point to a maximum 20 Tx buffers */
250 if (num_tbs >= IWL_NUM_OF_TBS) {
251 IWL_ERR(trans, "Error can not send more than %d chunks\n",
256 if (WARN_ON(addr & ~DMA_BIT_MASK(36)))
259 if (unlikely(addr & ~IWL_TX_DMA_MASK))
260 IWL_ERR(trans, "Unaligned address = %llx\n",
261 (unsigned long long)addr);
263 iwl_tfd_set_tb(tfd, num_tbs, addr, len);
268 /*************** DMA-QUEUE-GENERAL-FUNCTIONS *****
271 * Theory of operation
273 * A Tx or Rx queue resides in host DRAM, and is comprised of a circular buffer
274 * of buffer descriptors, each of which points to one or more data buffers for
275 * the device to read from or fill. Driver and device exchange status of each
276 * queue via "read" and "write" pointers. Driver keeps minimum of 2 empty
277 * entries in each circular buffer, to protect against confusing empty and full
280 * The device reads or writes the data in the queues via the device's several
281 * DMA/FIFO channels. Each queue is mapped to a single DMA channel.
283 * For Tx queue, there are low mark and high mark limits. If, after queuing
284 * the packet for Tx, free space become < low mark, Tx queue stopped. When
285 * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
288 ***************************************************/
290 int iwl_queue_space(const struct iwl_queue *q)
292 int s = q->read_ptr - q->write_ptr;
294 if (q->read_ptr > q->write_ptr)
299 /* keep some reserve to not confuse empty and full situations */
307 * iwl_queue_init - Initialize queue's high/low-water and read/write indexes
309 int iwl_queue_init(struct iwl_queue *q, int count, int slots_num, u32 id)
312 q->n_window = slots_num;
315 /* count must be power-of-two size, otherwise iwl_queue_inc_wrap
316 * and iwl_queue_dec_wrap are broken. */
317 if (WARN_ON(!is_power_of_2(count)))
320 /* slots_num must be power-of-two size, otherwise
321 * get_cmd_index is broken. */
322 if (WARN_ON(!is_power_of_2(slots_num)))
325 q->low_mark = q->n_window / 4;
329 q->high_mark = q->n_window / 8;
330 if (q->high_mark < 2)
333 q->write_ptr = q->read_ptr = 0;
338 static void iwlagn_txq_inval_byte_cnt_tbl(struct iwl_trans *trans,
339 struct iwl_tx_queue *txq)
341 struct iwl_trans_pcie *trans_pcie =
342 IWL_TRANS_GET_PCIE_TRANS(trans);
343 struct iwlagn_scd_bc_tbl *scd_bc_tbl = trans_pcie->scd_bc_tbls.addr;
344 int txq_id = txq->q.id;
345 int read_ptr = txq->q.read_ptr;
349 WARN_ON(read_ptr >= TFD_QUEUE_SIZE_MAX);
351 if (txq_id != trans->shrd->cmd_queue)
352 sta_id = txq->cmd[read_ptr]->cmd.tx.sta_id;
354 bc_ent = cpu_to_le16(1 | (sta_id << 12));
355 scd_bc_tbl[txq_id].tfd_offset[read_ptr] = bc_ent;
357 if (read_ptr < TFD_QUEUE_SIZE_BC_DUP)
359 tfd_offset[TFD_QUEUE_SIZE_MAX + read_ptr] = bc_ent;
362 static int iwlagn_tx_queue_set_q2ratid(struct iwl_trans *trans, u16 ra_tid,
369 struct iwl_trans_pcie *trans_pcie =
370 IWL_TRANS_GET_PCIE_TRANS(trans);
372 scd_q2ratid = ra_tid & SCD_QUEUE_RA_TID_MAP_RATID_MSK;
374 tbl_dw_addr = trans_pcie->scd_base_addr +
375 SCD_TRANS_TBL_OFFSET_QUEUE(txq_id);
377 tbl_dw = iwl_read_targ_mem(bus(trans), tbl_dw_addr);
380 tbl_dw = (scd_q2ratid << 16) | (tbl_dw & 0x0000FFFF);
382 tbl_dw = scd_q2ratid | (tbl_dw & 0xFFFF0000);
384 iwl_write_targ_mem(bus(trans), tbl_dw_addr, tbl_dw);
389 static void iwlagn_tx_queue_stop_scheduler(struct iwl_trans *trans, u16 txq_id)
391 /* Simply stop the queue, but don't change any configuration;
392 * the SCD_ACT_EN bit is the write-enable mask for the ACTIVE bit. */
393 iwl_write_prph(bus(trans),
394 SCD_QUEUE_STATUS_BITS(txq_id),
395 (0 << SCD_QUEUE_STTS_REG_POS_ACTIVE)|
396 (1 << SCD_QUEUE_STTS_REG_POS_SCD_ACT_EN));
399 void iwl_trans_set_wr_ptrs(struct iwl_trans *trans,
400 int txq_id, u32 index)
402 iwl_write_direct32(bus(trans), HBUS_TARG_WRPTR,
403 (index & 0xff) | (txq_id << 8));
404 iwl_write_prph(bus(trans), SCD_QUEUE_RDPTR(txq_id), index);
407 void iwl_trans_tx_queue_set_status(struct iwl_priv *priv,
408 struct iwl_tx_queue *txq,
409 int tx_fifo_id, int scd_retry)
411 int txq_id = txq->q.id;
412 int active = test_bit(txq_id, &priv->txq_ctx_active_msk) ? 1 : 0;
414 iwl_write_prph(bus(priv), SCD_QUEUE_STATUS_BITS(txq_id),
415 (active << SCD_QUEUE_STTS_REG_POS_ACTIVE) |
416 (tx_fifo_id << SCD_QUEUE_STTS_REG_POS_TXF) |
417 (1 << SCD_QUEUE_STTS_REG_POS_WSL) |
418 SCD_QUEUE_STTS_REG_MSK);
420 txq->sched_retry = scd_retry;
422 IWL_DEBUG_INFO(priv, "%s %s Queue %d on FIFO %d\n",
423 active ? "Activate" : "Deactivate",
424 scd_retry ? "BA" : "AC/CMD", txq_id, tx_fifo_id);
427 static inline int get_fifo_from_tid(struct iwl_trans_pcie *trans_pcie,
430 const u8 *ac_to_fifo = trans_pcie->ac_to_fifo[ctx];
431 if (likely(tid < ARRAY_SIZE(tid_to_ac)))
432 return ac_to_fifo[tid_to_ac[tid]];
434 /* no support for TIDs 8-15 yet */
438 void iwl_trans_pcie_txq_agg_setup(struct iwl_priv *priv,
439 enum iwl_rxon_context_id ctx, int sta_id,
440 int tid, int frame_limit)
442 int tx_fifo, txq_id, ssn_idx;
445 struct iwl_tid_data *tid_data;
447 struct iwl_trans *trans = trans(priv);
448 struct iwl_trans_pcie *trans_pcie =
449 IWL_TRANS_GET_PCIE_TRANS(trans);
451 if (WARN_ON(sta_id == IWL_INVALID_STATION))
453 if (WARN_ON(tid >= IWL_MAX_TID_COUNT))
456 tx_fifo = get_fifo_from_tid(trans_pcie, ctx, tid);
457 if (WARN_ON(tx_fifo < 0)) {
458 IWL_ERR(trans, "txq_agg_setup, bad fifo: %d\n", tx_fifo);
462 spin_lock_irqsave(&priv->shrd->sta_lock, flags);
463 tid_data = &priv->shrd->tid_data[sta_id][tid];
464 ssn_idx = SEQ_TO_SN(tid_data->seq_number);
465 txq_id = tid_data->agg.txq_id;
466 spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
468 ra_tid = BUILD_RAxTID(sta_id, tid);
470 spin_lock_irqsave(&priv->shrd->lock, flags);
472 /* Stop this Tx queue before configuring it */
473 iwlagn_tx_queue_stop_scheduler(trans, txq_id);
475 /* Map receiver-address / traffic-ID to this queue */
476 iwlagn_tx_queue_set_q2ratid(trans, ra_tid, txq_id);
478 /* Set this queue as a chain-building queue */
479 iwl_set_bits_prph(bus(priv), SCD_QUEUECHAIN_SEL, (1<<txq_id));
481 /* enable aggregations for the queue */
482 iwl_set_bits_prph(bus(priv), SCD_AGGR_SEL, (1<<txq_id));
484 /* Place first TFD at index corresponding to start sequence number.
485 * Assumes that ssn_idx is valid (!= 0xFFF) */
486 priv->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
487 priv->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
488 iwl_trans_set_wr_ptrs(trans, txq_id, ssn_idx);
490 /* Set up Tx window size and frame limit for this queue */
491 iwl_write_targ_mem(bus(priv), trans_pcie->scd_base_addr +
492 SCD_CONTEXT_QUEUE_OFFSET(txq_id) +
495 SCD_QUEUE_CTX_REG2_WIN_SIZE_POS) &
496 SCD_QUEUE_CTX_REG2_WIN_SIZE_MSK) |
498 SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) &
499 SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK));
501 iwl_set_bits_prph(bus(priv), SCD_INTERRUPT_MASK, (1 << txq_id));
503 /* Set up Status area in SRAM, map to Tx DMA/FIFO, activate the queue */
504 iwl_trans_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 1);
506 priv->txq[txq_id].sta_id = sta_id;
507 priv->txq[txq_id].tid = tid;
509 spin_unlock_irqrestore(&priv->shrd->lock, flags);
512 int iwl_trans_pcie_txq_agg_disable(struct iwl_priv *priv, u16 txq_id)
514 struct iwl_trans *trans = trans(priv);
515 if ((IWLAGN_FIRST_AMPDU_QUEUE > txq_id) ||
516 (IWLAGN_FIRST_AMPDU_QUEUE +
517 hw_params(priv).num_ampdu_queues <= txq_id)) {
519 "queue number out of range: %d, must be %d to %d\n",
520 txq_id, IWLAGN_FIRST_AMPDU_QUEUE,
521 IWLAGN_FIRST_AMPDU_QUEUE +
522 hw_params(priv).num_ampdu_queues - 1);
526 iwlagn_tx_queue_stop_scheduler(trans, txq_id);
528 iwl_clear_bits_prph(bus(priv), SCD_AGGR_SEL, (1 << txq_id));
530 priv->txq[txq_id].q.read_ptr = 0;
531 priv->txq[txq_id].q.write_ptr = 0;
532 /* supposes that ssn_idx is valid (!= 0xFFF) */
533 iwl_trans_set_wr_ptrs(trans, txq_id, 0);
535 iwl_clear_bits_prph(bus(priv), SCD_INTERRUPT_MASK, (1 << txq_id));
536 iwl_txq_ctx_deactivate(priv, txq_id);
537 iwl_trans_tx_queue_set_status(priv, &priv->txq[txq_id], 0, 0);
542 /*************** HOST COMMAND QUEUE FUNCTIONS *****/
545 * iwl_enqueue_hcmd - enqueue a uCode command
546 * @priv: device private data point
547 * @cmd: a point to the ucode command structure
549 * The function returns < 0 values to indicate the operation is
550 * failed. On success, it turns the index (> 0) of command in the
553 static int iwl_enqueue_hcmd(struct iwl_trans *trans, struct iwl_host_cmd *cmd)
555 struct iwl_tx_queue *txq = &priv(trans)->txq[trans->shrd->cmd_queue];
556 struct iwl_queue *q = &txq->q;
557 struct iwl_device_cmd *out_cmd;
558 struct iwl_cmd_meta *out_meta;
559 dma_addr_t phys_addr;
562 u16 copy_size, cmd_size;
563 bool is_ct_kill = false;
564 bool had_nocopy = false;
567 #ifdef CONFIG_IWLWIFI_DEVICE_TRACING
568 const void *trace_bufs[IWL_MAX_CMD_TFDS + 1] = {};
569 int trace_lens[IWL_MAX_CMD_TFDS + 1] = {};
573 if (test_bit(STATUS_FW_ERROR, &trans->shrd->status)) {
574 IWL_WARN(trans, "fw recovery, no hcmd send\n");
578 if ((trans->shrd->ucode_owner == IWL_OWNERSHIP_TM) &&
579 !(cmd->flags & CMD_ON_DEMAND)) {
580 IWL_DEBUG_HC(trans, "tm own the uCode, no regular hcmd send\n");
584 copy_size = sizeof(out_cmd->hdr);
585 cmd_size = sizeof(out_cmd->hdr);
587 /* need one for the header if the first is NOCOPY */
588 BUILD_BUG_ON(IWL_MAX_CMD_TFDS > IWL_NUM_OF_TBS - 1);
590 for (i = 0; i < IWL_MAX_CMD_TFDS; i++) {
593 if (cmd->dataflags[i] & IWL_HCMD_DFL_NOCOPY) {
596 /* NOCOPY must not be followed by normal! */
597 if (WARN_ON(had_nocopy))
599 copy_size += cmd->len[i];
601 cmd_size += cmd->len[i];
605 * If any of the command structures end up being larger than
606 * the TFD_MAX_PAYLOAD_SIZE and they aren't dynamically
607 * allocated into separate TFDs, then we will need to
608 * increase the size of the buffers.
610 if (WARN_ON(copy_size > TFD_MAX_PAYLOAD_SIZE))
613 if (iwl_is_rfkill(trans->shrd) || iwl_is_ctkill(trans->shrd)) {
614 IWL_WARN(trans, "Not sending command - %s KILL\n",
615 iwl_is_rfkill(trans->shrd) ? "RF" : "CT");
619 spin_lock_irqsave(&trans->hcmd_lock, flags);
621 if (iwl_queue_space(q) < ((cmd->flags & CMD_ASYNC) ? 2 : 1)) {
622 spin_unlock_irqrestore(&trans->hcmd_lock, flags);
624 IWL_ERR(trans, "No space in command queue\n");
625 is_ct_kill = iwl_check_for_ct_kill(priv(trans));
627 IWL_ERR(trans, "Restarting adapter queue is full\n");
628 iwlagn_fw_error(priv(trans), false);
633 idx = get_cmd_index(q, q->write_ptr);
634 out_cmd = txq->cmd[idx];
635 out_meta = &txq->meta[idx];
637 memset(out_meta, 0, sizeof(*out_meta)); /* re-initialize to NULL */
638 if (cmd->flags & CMD_WANT_SKB)
639 out_meta->source = cmd;
640 if (cmd->flags & CMD_ASYNC)
641 out_meta->callback = cmd->callback;
643 /* set up the header */
645 out_cmd->hdr.cmd = cmd->id;
646 out_cmd->hdr.flags = 0;
647 out_cmd->hdr.sequence =
648 cpu_to_le16(QUEUE_TO_SEQ(trans->shrd->cmd_queue) |
649 INDEX_TO_SEQ(q->write_ptr));
651 /* and copy the data that needs to be copied */
653 cmd_dest = &out_cmd->cmd.payload[0];
654 for (i = 0; i < IWL_MAX_CMD_TFDS; i++) {
657 if (cmd->dataflags[i] & IWL_HCMD_DFL_NOCOPY)
659 memcpy(cmd_dest, cmd->data[i], cmd->len[i]);
660 cmd_dest += cmd->len[i];
663 IWL_DEBUG_HC(trans, "Sending command %s (#%x), seq: 0x%04X, "
664 "%d bytes at %d[%d]:%d\n",
665 get_cmd_string(out_cmd->hdr.cmd),
667 le16_to_cpu(out_cmd->hdr.sequence), cmd_size,
668 q->write_ptr, idx, trans->shrd->cmd_queue);
670 phys_addr = dma_map_single(bus(trans)->dev, &out_cmd->hdr, copy_size,
672 if (unlikely(dma_mapping_error(bus(trans)->dev, phys_addr))) {
677 dma_unmap_addr_set(out_meta, mapping, phys_addr);
678 dma_unmap_len_set(out_meta, len, copy_size);
680 iwlagn_txq_attach_buf_to_tfd(trans, txq,
681 phys_addr, copy_size, 1);
682 #ifdef CONFIG_IWLWIFI_DEVICE_TRACING
683 trace_bufs[0] = &out_cmd->hdr;
684 trace_lens[0] = copy_size;
688 for (i = 0; i < IWL_MAX_CMD_TFDS; i++) {
691 if (!(cmd->dataflags[i] & IWL_HCMD_DFL_NOCOPY))
693 phys_addr = dma_map_single(bus(trans)->dev,
694 (void *)cmd->data[i],
695 cmd->len[i], DMA_BIDIRECTIONAL);
696 if (dma_mapping_error(bus(trans)->dev, phys_addr)) {
697 iwlagn_unmap_tfd(trans, out_meta,
698 &txq->tfds[q->write_ptr],
704 iwlagn_txq_attach_buf_to_tfd(trans, txq, phys_addr,
706 #ifdef CONFIG_IWLWIFI_DEVICE_TRACING
707 trace_bufs[trace_idx] = cmd->data[i];
708 trace_lens[trace_idx] = cmd->len[i];
713 out_meta->flags = cmd->flags;
715 txq->need_update = 1;
717 /* check that tracing gets all possible blocks */
718 BUILD_BUG_ON(IWL_MAX_CMD_TFDS + 1 != 3);
719 #ifdef CONFIG_IWLWIFI_DEVICE_TRACING
720 trace_iwlwifi_dev_hcmd(priv(trans), cmd->flags,
721 trace_bufs[0], trace_lens[0],
722 trace_bufs[1], trace_lens[1],
723 trace_bufs[2], trace_lens[2]);
726 /* Increment and update queue's write index */
727 q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
728 iwl_txq_update_write_ptr(trans, txq);
731 spin_unlock_irqrestore(&trans->hcmd_lock, flags);
736 * iwl_hcmd_queue_reclaim - Reclaim TX command queue entries already Tx'd
738 * When FW advances 'R' index, all entries between old and new 'R' index
739 * need to be reclaimed. As result, some free space forms. If there is
740 * enough free space (> low mark), wake the stack that feeds us.
742 static void iwl_hcmd_queue_reclaim(struct iwl_priv *priv, int txq_id, int idx)
744 struct iwl_tx_queue *txq = &priv->txq[txq_id];
745 struct iwl_queue *q = &txq->q;
748 if ((idx >= q->n_bd) || (iwl_queue_used(q, idx) == 0)) {
749 IWL_ERR(priv, "%s: Read index for DMA queue txq id (%d), "
750 "index %d is out of range [0-%d] %d %d.\n", __func__,
751 txq_id, idx, q->n_bd, q->write_ptr, q->read_ptr);
755 for (idx = iwl_queue_inc_wrap(idx, q->n_bd); q->read_ptr != idx;
756 q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd)) {
759 IWL_ERR(priv, "HCMD skipped: index (%d) %d %d\n", idx,
760 q->write_ptr, q->read_ptr);
761 iwlagn_fw_error(priv, false);
768 * iwl_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
769 * @rxb: Rx buffer to reclaim
771 * If an Rx buffer has an async callback associated with it the callback
772 * will be executed. The attached skb (if present) will only be freed
773 * if the callback returns 1
775 void iwl_tx_cmd_complete(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
777 struct iwl_rx_packet *pkt = rxb_addr(rxb);
778 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
779 int txq_id = SEQ_TO_QUEUE(sequence);
780 int index = SEQ_TO_INDEX(sequence);
782 struct iwl_device_cmd *cmd;
783 struct iwl_cmd_meta *meta;
784 struct iwl_trans *trans = trans(priv);
785 struct iwl_tx_queue *txq = &priv->txq[trans->shrd->cmd_queue];
788 /* If a Tx command is being handled and it isn't in the actual
789 * command queue then there a command routing bug has been introduced
790 * in the queue management code. */
791 if (WARN(txq_id != trans->shrd->cmd_queue,
792 "wrong command queue %d (should be %d), sequence 0x%X readp=%d writep=%d\n",
793 txq_id, trans->shrd->cmd_queue, sequence,
794 priv->txq[trans->shrd->cmd_queue].q.read_ptr,
795 priv->txq[trans->shrd->cmd_queue].q.write_ptr)) {
796 iwl_print_hex_error(priv, pkt, 32);
800 cmd_index = get_cmd_index(&txq->q, index);
801 cmd = txq->cmd[cmd_index];
802 meta = &txq->meta[cmd_index];
804 iwlagn_unmap_tfd(trans, meta, &txq->tfds[index],
807 /* Input error checking is done when commands are added to queue. */
808 if (meta->flags & CMD_WANT_SKB) {
809 meta->source->reply_page = (unsigned long)rxb_addr(rxb);
811 } else if (meta->callback)
812 meta->callback(priv, cmd, pkt);
814 spin_lock_irqsave(&trans->hcmd_lock, flags);
816 iwl_hcmd_queue_reclaim(priv, txq_id, index);
818 if (!(meta->flags & CMD_ASYNC)) {
819 clear_bit(STATUS_HCMD_ACTIVE, &trans->shrd->status);
820 IWL_DEBUG_INFO(trans, "Clearing HCMD_ACTIVE for command %s\n",
821 get_cmd_string(cmd->hdr.cmd));
822 wake_up_interruptible(&priv->wait_command_queue);
827 spin_unlock_irqrestore(&trans->hcmd_lock, flags);
830 const char *get_cmd_string(u8 cmd)
833 IWL_CMD(REPLY_ALIVE);
834 IWL_CMD(REPLY_ERROR);
836 IWL_CMD(REPLY_RXON_ASSOC);
837 IWL_CMD(REPLY_QOS_PARAM);
838 IWL_CMD(REPLY_RXON_TIMING);
839 IWL_CMD(REPLY_ADD_STA);
840 IWL_CMD(REPLY_REMOVE_STA);
841 IWL_CMD(REPLY_REMOVE_ALL_STA);
842 IWL_CMD(REPLY_TXFIFO_FLUSH);
843 IWL_CMD(REPLY_WEPKEY);
845 IWL_CMD(REPLY_LEDS_CMD);
846 IWL_CMD(REPLY_TX_LINK_QUALITY_CMD);
847 IWL_CMD(COEX_PRIORITY_TABLE_CMD);
848 IWL_CMD(COEX_MEDIUM_NOTIFICATION);
849 IWL_CMD(COEX_EVENT_CMD);
850 IWL_CMD(REPLY_QUIET_CMD);
851 IWL_CMD(REPLY_CHANNEL_SWITCH);
852 IWL_CMD(CHANNEL_SWITCH_NOTIFICATION);
853 IWL_CMD(REPLY_SPECTRUM_MEASUREMENT_CMD);
854 IWL_CMD(SPECTRUM_MEASURE_NOTIFICATION);
855 IWL_CMD(POWER_TABLE_CMD);
856 IWL_CMD(PM_SLEEP_NOTIFICATION);
857 IWL_CMD(PM_DEBUG_STATISTIC_NOTIFIC);
858 IWL_CMD(REPLY_SCAN_CMD);
859 IWL_CMD(REPLY_SCAN_ABORT_CMD);
860 IWL_CMD(SCAN_START_NOTIFICATION);
861 IWL_CMD(SCAN_RESULTS_NOTIFICATION);
862 IWL_CMD(SCAN_COMPLETE_NOTIFICATION);
863 IWL_CMD(BEACON_NOTIFICATION);
864 IWL_CMD(REPLY_TX_BEACON);
865 IWL_CMD(WHO_IS_AWAKE_NOTIFICATION);
866 IWL_CMD(QUIET_NOTIFICATION);
867 IWL_CMD(REPLY_TX_PWR_TABLE_CMD);
868 IWL_CMD(MEASURE_ABORT_NOTIFICATION);
869 IWL_CMD(REPLY_BT_CONFIG);
870 IWL_CMD(REPLY_STATISTICS_CMD);
871 IWL_CMD(STATISTICS_NOTIFICATION);
872 IWL_CMD(REPLY_CARD_STATE_CMD);
873 IWL_CMD(CARD_STATE_NOTIFICATION);
874 IWL_CMD(MISSED_BEACONS_NOTIFICATION);
875 IWL_CMD(REPLY_CT_KILL_CONFIG_CMD);
876 IWL_CMD(SENSITIVITY_CMD);
877 IWL_CMD(REPLY_PHY_CALIBRATION_CMD);
878 IWL_CMD(REPLY_RX_PHY_CMD);
879 IWL_CMD(REPLY_RX_MPDU_CMD);
881 IWL_CMD(REPLY_COMPRESSED_BA);
882 IWL_CMD(CALIBRATION_CFG_CMD);
883 IWL_CMD(CALIBRATION_RES_NOTIFICATION);
884 IWL_CMD(CALIBRATION_COMPLETE_NOTIFICATION);
885 IWL_CMD(REPLY_TX_POWER_DBM_CMD);
886 IWL_CMD(TEMPERATURE_NOTIFICATION);
887 IWL_CMD(TX_ANT_CONFIGURATION_CMD);
888 IWL_CMD(REPLY_BT_COEX_PROFILE_NOTIF);
889 IWL_CMD(REPLY_BT_COEX_PRIO_TABLE);
890 IWL_CMD(REPLY_BT_COEX_PROT_ENV);
891 IWL_CMD(REPLY_WIPAN_PARAMS);
892 IWL_CMD(REPLY_WIPAN_RXON);
893 IWL_CMD(REPLY_WIPAN_RXON_TIMING);
894 IWL_CMD(REPLY_WIPAN_RXON_ASSOC);
895 IWL_CMD(REPLY_WIPAN_QOS_PARAM);
896 IWL_CMD(REPLY_WIPAN_WEPKEY);
897 IWL_CMD(REPLY_WIPAN_P2P_CHANNEL_SWITCH);
898 IWL_CMD(REPLY_WIPAN_NOA_NOTIFICATION);
899 IWL_CMD(REPLY_WIPAN_DEACTIVATION_COMPLETE);
900 IWL_CMD(REPLY_WOWLAN_PATTERNS);
901 IWL_CMD(REPLY_WOWLAN_WAKEUP_FILTER);
902 IWL_CMD(REPLY_WOWLAN_TSC_RSC_PARAMS);
903 IWL_CMD(REPLY_WOWLAN_TKIP_PARAMS);
904 IWL_CMD(REPLY_WOWLAN_KEK_KCK_MATERIAL);
905 IWL_CMD(REPLY_WOWLAN_GET_STATUS);
912 #define HOST_COMPLETE_TIMEOUT (2 * HZ)
914 static void iwl_generic_cmd_callback(struct iwl_priv *priv,
915 struct iwl_device_cmd *cmd,
916 struct iwl_rx_packet *pkt)
918 if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
919 IWL_ERR(priv, "Bad return from %s (0x%08X)\n",
920 get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags);
924 #ifdef CONFIG_IWLWIFI_DEBUG
925 switch (cmd->hdr.cmd) {
926 case REPLY_TX_LINK_QUALITY_CMD:
927 case SENSITIVITY_CMD:
928 IWL_DEBUG_HC_DUMP(priv, "back from %s (0x%08X)\n",
929 get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags);
932 IWL_DEBUG_HC(priv, "back from %s (0x%08X)\n",
933 get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags);
938 static int iwl_send_cmd_async(struct iwl_trans *trans, struct iwl_host_cmd *cmd)
942 /* An asynchronous command can not expect an SKB to be set. */
943 if (WARN_ON(cmd->flags & CMD_WANT_SKB))
946 /* Assign a generic callback if one is not provided */
948 cmd->callback = iwl_generic_cmd_callback;
950 if (test_bit(STATUS_EXIT_PENDING, &trans->shrd->status))
953 ret = iwl_enqueue_hcmd(trans, cmd);
955 IWL_ERR(trans, "Error sending %s: enqueue_hcmd failed: %d\n",
956 get_cmd_string(cmd->id), ret);
962 static int iwl_send_cmd_sync(struct iwl_trans *trans, struct iwl_host_cmd *cmd)
967 lockdep_assert_held(&trans->shrd->mutex);
969 /* A synchronous command can not have a callback set. */
970 if (WARN_ON(cmd->callback))
973 IWL_DEBUG_INFO(trans, "Attempting to send sync command %s\n",
974 get_cmd_string(cmd->id));
976 set_bit(STATUS_HCMD_ACTIVE, &trans->shrd->status);
977 IWL_DEBUG_INFO(trans, "Setting HCMD_ACTIVE for command %s\n",
978 get_cmd_string(cmd->id));
980 cmd_idx = iwl_enqueue_hcmd(trans, cmd);
983 clear_bit(STATUS_HCMD_ACTIVE, &trans->shrd->status);
984 IWL_ERR(trans, "Error sending %s: enqueue_hcmd failed: %d\n",
985 get_cmd_string(cmd->id), ret);
989 ret = wait_event_interruptible_timeout(priv(trans)->wait_command_queue,
990 !test_bit(STATUS_HCMD_ACTIVE, &trans->shrd->status),
991 HOST_COMPLETE_TIMEOUT);
993 if (test_bit(STATUS_HCMD_ACTIVE, &trans->shrd->status)) {
995 "Error sending %s: time out after %dms.\n",
996 get_cmd_string(cmd->id),
997 jiffies_to_msecs(HOST_COMPLETE_TIMEOUT));
999 clear_bit(STATUS_HCMD_ACTIVE, &trans->shrd->status);
1000 IWL_DEBUG_INFO(trans, "Clearing HCMD_ACTIVE for command"
1001 "%s\n", get_cmd_string(cmd->id));
1007 if (test_bit(STATUS_RF_KILL_HW, &trans->shrd->status)) {
1008 IWL_ERR(trans, "Command %s aborted: RF KILL Switch\n",
1009 get_cmd_string(cmd->id));
1013 if (test_bit(STATUS_FW_ERROR, &trans->shrd->status)) {
1014 IWL_ERR(trans, "Command %s failed: FW Error\n",
1015 get_cmd_string(cmd->id));
1019 if ((cmd->flags & CMD_WANT_SKB) && !cmd->reply_page) {
1020 IWL_ERR(trans, "Error: Response NULL in '%s'\n",
1021 get_cmd_string(cmd->id));
1029 if (cmd->flags & CMD_WANT_SKB) {
1031 * Cancel the CMD_WANT_SKB flag for the cmd in the
1032 * TX cmd queue. Otherwise in case the cmd comes
1033 * in later, it will possibly set an invalid
1034 * address (cmd->meta.source).
1036 priv(trans)->txq[trans->shrd->cmd_queue].meta[cmd_idx].flags &=
1040 if (cmd->reply_page) {
1041 iwl_free_pages(trans->shrd, cmd->reply_page);
1042 cmd->reply_page = 0;
1048 int iwl_trans_pcie_send_cmd(struct iwl_trans *trans, struct iwl_host_cmd *cmd)
1050 if (cmd->flags & CMD_ASYNC)
1051 return iwl_send_cmd_async(trans, cmd);
1053 return iwl_send_cmd_sync(trans, cmd);
1056 int iwl_trans_pcie_send_cmd_pdu(struct iwl_trans *trans, u8 id, u32 flags,
1057 u16 len, const void *data)
1059 struct iwl_host_cmd cmd = {
1066 return iwl_trans_pcie_send_cmd(trans, &cmd);
1069 /* Frees buffers until index _not_ inclusive */
1070 void iwl_tx_queue_reclaim(struct iwl_trans *trans, int txq_id, int index,
1071 struct sk_buff_head *skbs)
1073 struct iwl_tx_queue *txq = &priv(trans)->txq[txq_id];
1074 struct iwl_queue *q = &txq->q;
1077 /*Since we free until index _not_ inclusive, the one before index is
1078 * the last we will free. This one must be used */
1079 last_to_free = iwl_queue_dec_wrap(index, q->n_bd);
1081 if ((index >= q->n_bd) ||
1082 (iwl_queue_used(q, last_to_free) == 0)) {
1083 IWL_ERR(trans, "%s: Read index for DMA queue txq id (%d), "
1084 "last_to_free %d is out of range [0-%d] %d %d.\n",
1085 __func__, txq_id, last_to_free, q->n_bd,
1086 q->write_ptr, q->read_ptr);
1090 IWL_DEBUG_TX_REPLY(trans, "reclaim: [%d, %d, %d]\n", txq_id,
1091 q->read_ptr, index);
1093 if (WARN_ON(!skb_queue_empty(skbs)))
1097 q->read_ptr != index;
1098 q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd)) {
1100 if (WARN_ON_ONCE(txq->skbs[txq->q.read_ptr] == NULL))
1103 __skb_queue_tail(skbs, txq->skbs[txq->q.read_ptr]);
1105 txq->skbs[txq->q.read_ptr] = NULL;
1107 iwlagn_txq_inval_byte_cnt_tbl(trans, txq);
1109 iwlagn_txq_free_tfd(trans, txq, txq->q.read_ptr);