1 /******************************************************************************
3 * This file is provided under a dual BSD/GPLv2 license. When using or
4 * redistributing this file, you may do so under either license.
8 * Copyright(c) 2007 - 2012 Intel Corporation. All rights reserved.
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of version 2 of the GNU General Public License as
12 * published by the Free Software Foundation.
14 * This program is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
24 * The full GNU General Public License is included in this distribution
25 * in the file called LICENSE.GPL.
27 * Contact Information:
28 * Intel Linux Wireless <ilw@linux.intel.com>
29 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
33 * Copyright(c) 2005 - 2012 Intel Corporation. All rights reserved.
34 * All rights reserved.
36 * Redistribution and use in source and binary forms, with or without
37 * modification, are permitted provided that the following conditions
40 * * Redistributions of source code must retain the above copyright
41 * notice, this list of conditions and the following disclaimer.
42 * * Redistributions in binary form must reproduce the above copyright
43 * notice, this list of conditions and the following disclaimer in
44 * the documentation and/or other materials provided with the
46 * * Neither the name Intel Corporation nor the names of its
47 * contributors may be used to endorse or promote products derived
48 * from this software without specific prior written permission.
50 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
51 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
52 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
53 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
54 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
55 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
56 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
57 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
58 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
59 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
60 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
62 *****************************************************************************/
63 #include <linux/pci.h>
64 #include <linux/pci-aspm.h>
65 #include <linux/interrupt.h>
66 #include <linux/debugfs.h>
67 #include <linux/bitops.h>
68 #include <linux/gfp.h>
70 #include "iwl-trans.h"
71 #include "iwl-trans-pcie-int.h"
74 #include "iwl-shared.h"
75 #include "iwl-eeprom.h"
76 #include "iwl-agn-hw.h"
78 static int iwl_trans_rx_alloc(struct iwl_trans *trans)
80 struct iwl_trans_pcie *trans_pcie =
81 IWL_TRANS_GET_PCIE_TRANS(trans);
82 struct iwl_rx_queue *rxq = &trans_pcie->rxq;
83 struct device *dev = trans->dev;
85 memset(&trans_pcie->rxq, 0, sizeof(trans_pcie->rxq));
87 spin_lock_init(&rxq->lock);
89 if (WARN_ON(rxq->bd || rxq->rb_stts))
92 /* Allocate the circular buffer of Read Buffer Descriptors (RBDs) */
93 rxq->bd = dma_zalloc_coherent(dev, sizeof(__le32) * RX_QUEUE_SIZE,
94 &rxq->bd_dma, GFP_KERNEL);
98 /*Allocate the driver's pointer to receive buffer status */
99 rxq->rb_stts = dma_zalloc_coherent(dev, sizeof(*rxq->rb_stts),
100 &rxq->rb_stts_dma, GFP_KERNEL);
107 dma_free_coherent(dev, sizeof(__le32) * RX_QUEUE_SIZE,
108 rxq->bd, rxq->bd_dma);
109 memset(&rxq->bd_dma, 0, sizeof(rxq->bd_dma));
115 static void iwl_trans_rxq_free_rx_bufs(struct iwl_trans *trans)
117 struct iwl_trans_pcie *trans_pcie =
118 IWL_TRANS_GET_PCIE_TRANS(trans);
119 struct iwl_rx_queue *rxq = &trans_pcie->rxq;
122 /* Fill the rx_used queue with _all_ of the Rx buffers */
123 for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
124 /* In the reset function, these buffers may have been allocated
125 * to an SKB, so we need to unmap and free potential storage */
126 if (rxq->pool[i].page != NULL) {
127 dma_unmap_page(trans->dev, rxq->pool[i].page_dma,
128 PAGE_SIZE << hw_params(trans).rx_page_order,
130 __free_pages(rxq->pool[i].page,
131 hw_params(trans).rx_page_order);
132 rxq->pool[i].page = NULL;
134 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
138 static void iwl_trans_rx_hw_init(struct iwl_trans *trans,
139 struct iwl_rx_queue *rxq)
142 const u32 rfdnlog = RX_QUEUE_SIZE_LOG; /* 256 RBDs */
143 u32 rb_timeout = RX_RB_TIMEOUT; /* FIXME: RX_RB_TIMEOUT for all devices? */
145 if (iwlagn_mod_params.amsdu_size_8K)
146 rb_size = FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_8K;
148 rb_size = FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_4K;
151 iwl_write_direct32(trans, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0);
153 /* Reset driver's Rx queue write index */
154 iwl_write_direct32(trans, FH_RSCSR_CHNL0_RBDCB_WPTR_REG, 0);
156 /* Tell device where to find RBD circular buffer in DRAM */
157 iwl_write_direct32(trans, FH_RSCSR_CHNL0_RBDCB_BASE_REG,
158 (u32)(rxq->bd_dma >> 8));
160 /* Tell device where in DRAM to update its Rx status */
161 iwl_write_direct32(trans, FH_RSCSR_CHNL0_STTS_WPTR_REG,
162 rxq->rb_stts_dma >> 4);
165 * FH_RCSR_CHNL0_RX_IGNORE_RXF_EMPTY is set because of HW bug in
166 * the credit mechanism in 5000 HW RX FIFO
167 * Direct rx interrupts to hosts
168 * Rx buffer size 4 or 8k
172 iwl_write_direct32(trans, FH_MEM_RCSR_CHNL0_CONFIG_REG,
173 FH_RCSR_RX_CONFIG_CHNL_EN_ENABLE_VAL |
174 FH_RCSR_CHNL0_RX_IGNORE_RXF_EMPTY |
175 FH_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_INT_HOST_VAL |
176 FH_RCSR_CHNL0_RX_CONFIG_SINGLE_FRAME_MSK |
178 (rb_timeout << FH_RCSR_RX_CONFIG_REG_IRQ_RBTH_POS)|
179 (rfdnlog << FH_RCSR_RX_CONFIG_RBDCB_SIZE_POS));
181 /* Set interrupt coalescing timer to default (2048 usecs) */
182 iwl_write8(trans, CSR_INT_COALESCING, IWL_HOST_INT_TIMEOUT_DEF);
185 static int iwl_rx_init(struct iwl_trans *trans)
187 struct iwl_trans_pcie *trans_pcie =
188 IWL_TRANS_GET_PCIE_TRANS(trans);
189 struct iwl_rx_queue *rxq = &trans_pcie->rxq;
195 err = iwl_trans_rx_alloc(trans);
200 spin_lock_irqsave(&rxq->lock, flags);
201 INIT_LIST_HEAD(&rxq->rx_free);
202 INIT_LIST_HEAD(&rxq->rx_used);
204 iwl_trans_rxq_free_rx_bufs(trans);
206 for (i = 0; i < RX_QUEUE_SIZE; i++)
207 rxq->queue[i] = NULL;
209 /* Set us so that we have processed and used all buffers, but have
210 * not restocked the Rx queue with fresh buffers */
211 rxq->read = rxq->write = 0;
212 rxq->write_actual = 0;
214 spin_unlock_irqrestore(&rxq->lock, flags);
216 iwlagn_rx_replenish(trans);
218 iwl_trans_rx_hw_init(trans, rxq);
220 spin_lock_irqsave(&trans->shrd->lock, flags);
221 rxq->need_update = 1;
222 iwl_rx_queue_update_write_ptr(trans, rxq);
223 spin_unlock_irqrestore(&trans->shrd->lock, flags);
228 static void iwl_trans_pcie_rx_free(struct iwl_trans *trans)
230 struct iwl_trans_pcie *trans_pcie =
231 IWL_TRANS_GET_PCIE_TRANS(trans);
232 struct iwl_rx_queue *rxq = &trans_pcie->rxq;
236 /*if rxq->bd is NULL, it means that nothing has been allocated,
239 IWL_DEBUG_INFO(trans, "Free NULL rx context\n");
243 spin_lock_irqsave(&rxq->lock, flags);
244 iwl_trans_rxq_free_rx_bufs(trans);
245 spin_unlock_irqrestore(&rxq->lock, flags);
247 dma_free_coherent(trans->dev, sizeof(__le32) * RX_QUEUE_SIZE,
248 rxq->bd, rxq->bd_dma);
249 memset(&rxq->bd_dma, 0, sizeof(rxq->bd_dma));
253 dma_free_coherent(trans->dev,
254 sizeof(struct iwl_rb_status),
255 rxq->rb_stts, rxq->rb_stts_dma);
257 IWL_DEBUG_INFO(trans, "Free rxq->rb_stts which is NULL\n");
258 memset(&rxq->rb_stts_dma, 0, sizeof(rxq->rb_stts_dma));
262 static int iwl_trans_rx_stop(struct iwl_trans *trans)
266 iwl_write_direct32(trans, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0);
267 return iwl_poll_direct_bit(trans, FH_MEM_RSSR_RX_STATUS_REG,
268 FH_RSSR_CHNL0_RX_STATUS_CHNL_IDLE, 1000);
271 static inline int iwlagn_alloc_dma_ptr(struct iwl_trans *trans,
272 struct iwl_dma_ptr *ptr, size_t size)
274 if (WARN_ON(ptr->addr))
277 ptr->addr = dma_alloc_coherent(trans->dev, size,
278 &ptr->dma, GFP_KERNEL);
285 static inline void iwlagn_free_dma_ptr(struct iwl_trans *trans,
286 struct iwl_dma_ptr *ptr)
288 if (unlikely(!ptr->addr))
291 dma_free_coherent(trans->dev, ptr->size, ptr->addr, ptr->dma);
292 memset(ptr, 0, sizeof(*ptr));
295 static int iwl_trans_txq_alloc(struct iwl_trans *trans,
296 struct iwl_tx_queue *txq, int slots_num,
299 size_t tfd_sz = sizeof(struct iwl_tfd) * TFD_QUEUE_SIZE_MAX;
302 if (WARN_ON(txq->meta || txq->cmd || txq->skbs || txq->tfds))
305 txq->q.n_window = slots_num;
307 txq->meta = kcalloc(slots_num, sizeof(txq->meta[0]), GFP_KERNEL);
308 txq->cmd = kcalloc(slots_num, sizeof(txq->cmd[0]), GFP_KERNEL);
310 if (!txq->meta || !txq->cmd)
313 if (txq_id == trans->shrd->cmd_queue)
314 for (i = 0; i < slots_num; i++) {
315 txq->cmd[i] = kmalloc(sizeof(struct iwl_device_cmd),
321 /* Alloc driver data array and TFD circular buffer */
322 /* Driver private data, only for Tx (not command) queues,
323 * not shared with device. */
324 if (txq_id != trans->shrd->cmd_queue) {
325 txq->skbs = kcalloc(TFD_QUEUE_SIZE_MAX, sizeof(txq->skbs[0]),
328 IWL_ERR(trans, "kmalloc for auxiliary BD "
329 "structures failed\n");
336 /* Circular buffer of transmit frame descriptors (TFDs),
337 * shared with device */
338 txq->tfds = dma_alloc_coherent(trans->dev, tfd_sz,
339 &txq->q.dma_addr, GFP_KERNEL);
341 IWL_ERR(trans, "dma_alloc_coherent(%zd) failed\n", tfd_sz);
350 /* since txq->cmd has been zeroed,
351 * all non allocated cmd[i] will be NULL */
352 if (txq->cmd && txq_id == trans->shrd->cmd_queue)
353 for (i = 0; i < slots_num; i++)
364 static int iwl_trans_txq_init(struct iwl_trans *trans, struct iwl_tx_queue *txq,
365 int slots_num, u32 txq_id)
369 txq->need_update = 0;
370 memset(txq->meta, 0, sizeof(txq->meta[0]) * slots_num);
373 * For the default queues 0-3, set up the swq_id
374 * already -- all others need to get one later
375 * (if they need one at all).
378 iwl_set_swq_id(txq, txq_id, txq_id);
380 /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
381 * iwl_queue_inc_wrap and iwl_queue_dec_wrap are broken. */
382 BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
384 /* Initialize queue's high/low-water marks, and head/tail indexes */
385 ret = iwl_queue_init(&txq->q, TFD_QUEUE_SIZE_MAX, slots_num,
391 * Tell nic where to find circular buffer of Tx Frame Descriptors for
392 * given Tx queue, and enable the DMA channel used for that queue.
393 * Circular buffer (TFD queue in DRAM) physical base address */
394 iwl_write_direct32(trans, FH_MEM_CBBC_QUEUE(txq_id),
395 txq->q.dma_addr >> 8);
401 * iwl_tx_queue_unmap - Unmap any remaining DMA mappings and free skb's
403 static void iwl_tx_queue_unmap(struct iwl_trans *trans, int txq_id)
405 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
406 struct iwl_tx_queue *txq = &trans_pcie->txq[txq_id];
407 struct iwl_queue *q = &txq->q;
408 enum dma_data_direction dma_dir;
415 /* In the command queue, all the TBs are mapped as BIDI
416 * so unmap them as such.
418 if (txq_id == trans->shrd->cmd_queue) {
419 dma_dir = DMA_BIDIRECTIONAL;
420 lock = &trans->hcmd_lock;
422 dma_dir = DMA_TO_DEVICE;
423 lock = &trans->shrd->sta_lock;
426 spin_lock_irqsave(lock, flags);
427 while (q->write_ptr != q->read_ptr) {
428 /* The read_ptr needs to bound by q->n_window */
429 iwlagn_txq_free_tfd(trans, txq, get_cmd_index(q, q->read_ptr),
431 q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd);
433 spin_unlock_irqrestore(lock, flags);
437 * iwl_tx_queue_free - Deallocate DMA queue.
438 * @txq: Transmit queue to deallocate.
440 * Empty queue by removing and destroying all BD's.
442 * 0-fill, but do not free "txq" descriptor structure.
444 static void iwl_tx_queue_free(struct iwl_trans *trans, int txq_id)
446 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
447 struct iwl_tx_queue *txq = &trans_pcie->txq[txq_id];
448 struct device *dev = trans->dev;
453 iwl_tx_queue_unmap(trans, txq_id);
455 /* De-alloc array of command/tx buffers */
457 if (txq_id == trans->shrd->cmd_queue)
458 for (i = 0; i < txq->q.n_window; i++)
461 /* De-alloc circular buffer of TFDs */
463 dma_free_coherent(dev, sizeof(struct iwl_tfd) *
464 txq->q.n_bd, txq->tfds, txq->q.dma_addr);
465 memset(&txq->q.dma_addr, 0, sizeof(txq->q.dma_addr));
468 /* De-alloc array of per-TFD driver data */
472 /* deallocate arrays */
478 /* 0-fill queue descriptor structure */
479 memset(txq, 0, sizeof(*txq));
483 * iwl_trans_tx_free - Free TXQ Context
485 * Destroy all TX DMA queues and structures
487 static void iwl_trans_pcie_tx_free(struct iwl_trans *trans)
490 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
493 if (trans_pcie->txq) {
495 txq_id < hw_params(trans).max_txq_num; txq_id++)
496 iwl_tx_queue_free(trans, txq_id);
499 kfree(trans_pcie->txq);
500 trans_pcie->txq = NULL;
502 iwlagn_free_dma_ptr(trans, &trans_pcie->kw);
504 iwlagn_free_dma_ptr(trans, &trans_pcie->scd_bc_tbls);
508 * iwl_trans_tx_alloc - allocate TX context
509 * Allocate all Tx DMA structures and initialize them
514 static int iwl_trans_tx_alloc(struct iwl_trans *trans)
517 int txq_id, slots_num;
518 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
520 u16 scd_bc_tbls_size = hw_params(trans).max_txq_num *
521 sizeof(struct iwlagn_scd_bc_tbl);
523 /*It is not allowed to alloc twice, so warn when this happens.
524 * We cannot rely on the previous allocation, so free and fail */
525 if (WARN_ON(trans_pcie->txq)) {
530 ret = iwlagn_alloc_dma_ptr(trans, &trans_pcie->scd_bc_tbls,
533 IWL_ERR(trans, "Scheduler BC Table allocation failed\n");
537 /* Alloc keep-warm buffer */
538 ret = iwlagn_alloc_dma_ptr(trans, &trans_pcie->kw, IWL_KW_SIZE);
540 IWL_ERR(trans, "Keep Warm allocation failed\n");
544 trans_pcie->txq = kcalloc(hw_params(trans).max_txq_num,
545 sizeof(struct iwl_tx_queue), GFP_KERNEL);
546 if (!trans_pcie->txq) {
547 IWL_ERR(trans, "Not enough memory for txq\n");
552 /* Alloc and init all Tx queues, including the command queue (#4/#9) */
553 for (txq_id = 0; txq_id < hw_params(trans).max_txq_num; txq_id++) {
554 slots_num = (txq_id == trans->shrd->cmd_queue) ?
555 TFD_CMD_SLOTS : TFD_TX_CMD_SLOTS;
556 ret = iwl_trans_txq_alloc(trans, &trans_pcie->txq[txq_id],
559 IWL_ERR(trans, "Tx %d queue alloc failed\n", txq_id);
567 iwl_trans_pcie_tx_free(trans);
571 static int iwl_tx_init(struct iwl_trans *trans)
574 int txq_id, slots_num;
577 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
579 if (!trans_pcie->txq) {
580 ret = iwl_trans_tx_alloc(trans);
586 spin_lock_irqsave(&trans->shrd->lock, flags);
588 /* Turn off all Tx DMA fifos */
589 iwl_write_prph(trans, SCD_TXFACT, 0);
591 /* Tell NIC where to find the "keep warm" buffer */
592 iwl_write_direct32(trans, FH_KW_MEM_ADDR_REG,
593 trans_pcie->kw.dma >> 4);
595 spin_unlock_irqrestore(&trans->shrd->lock, flags);
597 /* Alloc and init all Tx queues, including the command queue (#4/#9) */
598 for (txq_id = 0; txq_id < hw_params(trans).max_txq_num; txq_id++) {
599 slots_num = (txq_id == trans->shrd->cmd_queue) ?
600 TFD_CMD_SLOTS : TFD_TX_CMD_SLOTS;
601 ret = iwl_trans_txq_init(trans, &trans_pcie->txq[txq_id],
604 IWL_ERR(trans, "Tx %d queue init failed\n", txq_id);
611 /*Upon error, free only if we allocated something */
613 iwl_trans_pcie_tx_free(trans);
617 static void iwl_set_pwr_vmain(struct iwl_trans *trans)
620 * (for documentation purposes)
621 * to set power to V_AUX, do:
623 if (pci_pme_capable(priv->pci_dev, PCI_D3cold))
624 iwl_set_bits_mask_prph(trans, APMG_PS_CTRL_REG,
625 APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
626 ~APMG_PS_CTRL_MSK_PWR_SRC);
629 iwl_set_bits_mask_prph(trans, APMG_PS_CTRL_REG,
630 APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
631 ~APMG_PS_CTRL_MSK_PWR_SRC);
634 static int iwl_nic_init(struct iwl_trans *trans)
639 spin_lock_irqsave(&trans->shrd->lock, flags);
640 iwl_apm_init(priv(trans));
642 /* Set interrupt coalescing calibration timer to default (512 usecs) */
643 iwl_write8(trans, CSR_INT_COALESCING,
644 IWL_HOST_INT_CALIB_TIMEOUT_DEF);
646 spin_unlock_irqrestore(&trans->shrd->lock, flags);
648 iwl_set_pwr_vmain(trans);
650 iwl_nic_config(priv(trans));
652 #ifndef CONFIG_IWLWIFI_IDI
653 /* Allocate the RX queue, or reset if it is already allocated */
657 /* Allocate or reset and init all Tx and Command queues */
658 if (iwl_tx_init(trans))
661 if (hw_params(trans).shadow_reg_enable) {
662 /* enable shadow regs in HW */
663 iwl_set_bit(trans, CSR_MAC_SHADOW_REG_CTRL,
667 set_bit(STATUS_INIT, &trans->shrd->status);
672 #define HW_READY_TIMEOUT (50)
674 /* Note: returns poll_bit return value, which is >= 0 if success */
675 static int iwl_set_hw_ready(struct iwl_trans *trans)
679 iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG,
680 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY);
682 /* See if we got it */
683 ret = iwl_poll_bit(trans, CSR_HW_IF_CONFIG_REG,
684 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
685 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
688 IWL_DEBUG_INFO(trans, "hardware%s ready\n", ret < 0 ? " not" : "");
692 /* Note: returns standard 0/-ERROR code */
693 static int iwl_trans_pcie_prepare_card_hw(struct iwl_trans *trans)
697 IWL_DEBUG_INFO(trans, "iwl_trans_prepare_card_hw enter\n");
699 ret = iwl_set_hw_ready(trans);
703 /* If HW is not ready, prepare the conditions to check again */
704 iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG,
705 CSR_HW_IF_CONFIG_REG_PREPARE);
707 ret = iwl_poll_bit(trans, CSR_HW_IF_CONFIG_REG,
708 ~CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE,
709 CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE, 150000);
714 /* HW should be ready by now, check again. */
715 ret = iwl_set_hw_ready(trans);
721 #define IWL_AC_UNSET -1
723 struct queue_to_fifo_ac {
727 static const struct queue_to_fifo_ac iwlagn_default_queue_to_tx_fifo[] = {
728 { IWL_TX_FIFO_VO, IEEE80211_AC_VO, },
729 { IWL_TX_FIFO_VI, IEEE80211_AC_VI, },
730 { IWL_TX_FIFO_BE, IEEE80211_AC_BE, },
731 { IWL_TX_FIFO_BK, IEEE80211_AC_BK, },
732 { IWLAGN_CMD_FIFO_NUM, IWL_AC_UNSET, },
733 { IWL_TX_FIFO_UNUSED, IWL_AC_UNSET, },
734 { IWL_TX_FIFO_UNUSED, IWL_AC_UNSET, },
735 { IWL_TX_FIFO_UNUSED, IWL_AC_UNSET, },
736 { IWL_TX_FIFO_UNUSED, IWL_AC_UNSET, },
737 { IWL_TX_FIFO_UNUSED, IWL_AC_UNSET, },
738 { IWL_TX_FIFO_UNUSED, IWL_AC_UNSET, },
741 static const struct queue_to_fifo_ac iwlagn_ipan_queue_to_tx_fifo[] = {
742 { IWL_TX_FIFO_VO, IEEE80211_AC_VO, },
743 { IWL_TX_FIFO_VI, IEEE80211_AC_VI, },
744 { IWL_TX_FIFO_BE, IEEE80211_AC_BE, },
745 { IWL_TX_FIFO_BK, IEEE80211_AC_BK, },
746 { IWL_TX_FIFO_BK_IPAN, IEEE80211_AC_BK, },
747 { IWL_TX_FIFO_BE_IPAN, IEEE80211_AC_BE, },
748 { IWL_TX_FIFO_VI_IPAN, IEEE80211_AC_VI, },
749 { IWL_TX_FIFO_VO_IPAN, IEEE80211_AC_VO, },
750 { IWL_TX_FIFO_BE_IPAN, 2, },
751 { IWLAGN_CMD_FIFO_NUM, IWL_AC_UNSET, },
752 { IWL_TX_FIFO_AUX, IWL_AC_UNSET, },
755 static const u8 iwlagn_bss_ac_to_fifo[] = {
761 static const u8 iwlagn_bss_ac_to_queue[] = {
764 static const u8 iwlagn_pan_ac_to_fifo[] = {
770 static const u8 iwlagn_pan_ac_to_queue[] = {
774 static int iwl_trans_pcie_start_device(struct iwl_trans *trans)
777 struct iwl_trans_pcie *trans_pcie =
778 IWL_TRANS_GET_PCIE_TRANS(trans);
780 trans->shrd->ucode_owner = IWL_OWNERSHIP_DRIVER;
781 trans_pcie->ac_to_queue[IWL_RXON_CTX_BSS] = iwlagn_bss_ac_to_queue;
782 trans_pcie->ac_to_queue[IWL_RXON_CTX_PAN] = iwlagn_pan_ac_to_queue;
784 trans_pcie->ac_to_fifo[IWL_RXON_CTX_BSS] = iwlagn_bss_ac_to_fifo;
785 trans_pcie->ac_to_fifo[IWL_RXON_CTX_PAN] = iwlagn_pan_ac_to_fifo;
787 trans_pcie->mcast_queue[IWL_RXON_CTX_BSS] = 0;
788 trans_pcie->mcast_queue[IWL_RXON_CTX_PAN] = IWL_IPAN_MCAST_QUEUE;
790 if ((hw_params(trans).sku & EEPROM_SKU_CAP_AMT_ENABLE) &&
791 iwl_trans_pcie_prepare_card_hw(trans)) {
792 IWL_WARN(trans, "Exit HW not ready\n");
796 /* If platform's RF_KILL switch is NOT set to KILL */
797 if (iwl_read32(trans, CSR_GP_CNTRL) &
798 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
799 clear_bit(STATUS_RF_KILL_HW, &trans->shrd->status);
801 set_bit(STATUS_RF_KILL_HW, &trans->shrd->status);
803 if (iwl_is_rfkill(trans->shrd)) {
804 iwl_set_hw_rfkill_state(priv(trans), true);
805 iwl_enable_interrupts(trans);
809 iwl_write32(trans, CSR_INT, 0xFFFFFFFF);
811 ret = iwl_nic_init(trans);
813 IWL_ERR(trans, "Unable to init nic\n");
817 /* make sure rfkill handshake bits are cleared */
818 iwl_write32(trans, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
819 iwl_write32(trans, CSR_UCODE_DRV_GP1_CLR,
820 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
822 /* clear (again), then enable host interrupts */
823 iwl_write32(trans, CSR_INT, 0xFFFFFFFF);
824 iwl_enable_interrupts(trans);
826 /* really make sure rfkill handshake bits are cleared */
827 iwl_write32(trans, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
828 iwl_write32(trans, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
834 * Activate/Deactivate Tx DMA/FIFO channels according tx fifos mask
835 * must be called under priv->shrd->lock and mac access
837 static void iwl_trans_txq_set_sched(struct iwl_trans *trans, u32 mask)
839 iwl_write_prph(trans, SCD_TXFACT, mask);
842 static void iwl_tx_start(struct iwl_trans *trans)
844 const struct queue_to_fifo_ac *queue_to_fifo;
845 struct iwl_trans_pcie *trans_pcie =
846 IWL_TRANS_GET_PCIE_TRANS(trans);
852 spin_lock_irqsave(&trans->shrd->lock, flags);
854 trans_pcie->scd_base_addr =
855 iwl_read_prph(trans, SCD_SRAM_BASE_ADDR);
856 a = trans_pcie->scd_base_addr + SCD_CONTEXT_MEM_LOWER_BOUND;
857 /* reset conext data memory */
858 for (; a < trans_pcie->scd_base_addr + SCD_CONTEXT_MEM_UPPER_BOUND;
860 iwl_write_targ_mem(trans, a, 0);
861 /* reset tx status memory */
862 for (; a < trans_pcie->scd_base_addr + SCD_TX_STTS_MEM_UPPER_BOUND;
864 iwl_write_targ_mem(trans, a, 0);
865 for (; a < trans_pcie->scd_base_addr +
866 SCD_TRANS_TBL_OFFSET_QUEUE(hw_params(trans).max_txq_num);
868 iwl_write_targ_mem(trans, a, 0);
870 iwl_write_prph(trans, SCD_DRAM_BASE_ADDR,
871 trans_pcie->scd_bc_tbls.dma >> 10);
873 /* Enable DMA channel */
874 for (chan = 0; chan < FH_TCSR_CHNL_NUM ; chan++)
875 iwl_write_direct32(trans, FH_TCSR_CHNL_TX_CONFIG_REG(chan),
876 FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE |
877 FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE);
879 /* Update FH chicken bits */
880 reg_val = iwl_read_direct32(trans, FH_TX_CHICKEN_BITS_REG);
881 iwl_write_direct32(trans, FH_TX_CHICKEN_BITS_REG,
882 reg_val | FH_TX_CHICKEN_BITS_SCD_AUTO_RETRY_EN);
884 iwl_write_prph(trans, SCD_QUEUECHAIN_SEL,
885 SCD_QUEUECHAIN_SEL_ALL(trans));
886 iwl_write_prph(trans, SCD_AGGR_SEL, 0);
888 /* initiate the queues */
889 for (i = 0; i < hw_params(trans).max_txq_num; i++) {
890 iwl_write_prph(trans, SCD_QUEUE_RDPTR(i), 0);
891 iwl_write_direct32(trans, HBUS_TARG_WRPTR, 0 | (i << 8));
892 iwl_write_targ_mem(trans, trans_pcie->scd_base_addr +
893 SCD_CONTEXT_QUEUE_OFFSET(i), 0);
894 iwl_write_targ_mem(trans, trans_pcie->scd_base_addr +
895 SCD_CONTEXT_QUEUE_OFFSET(i) +
898 SCD_QUEUE_CTX_REG2_WIN_SIZE_POS) &
899 SCD_QUEUE_CTX_REG2_WIN_SIZE_MSK) |
901 SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) &
902 SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK));
905 iwl_write_prph(trans, SCD_INTERRUPT_MASK,
906 IWL_MASK(0, hw_params(trans).max_txq_num));
908 /* Activate all Tx DMA/FIFO channels */
909 iwl_trans_txq_set_sched(trans, IWL_MASK(0, 7));
911 /* map queues to FIFOs */
912 if (trans->shrd->valid_contexts != BIT(IWL_RXON_CTX_BSS))
913 queue_to_fifo = iwlagn_ipan_queue_to_tx_fifo;
915 queue_to_fifo = iwlagn_default_queue_to_tx_fifo;
917 iwl_trans_set_wr_ptrs(trans, trans->shrd->cmd_queue, 0);
919 /* make sure all queue are not stopped */
920 memset(&trans_pcie->queue_stopped[0], 0,
921 sizeof(trans_pcie->queue_stopped));
922 for (i = 0; i < 4; i++)
923 atomic_set(&trans_pcie->queue_stop_count[i], 0);
925 /* reset to 0 to enable all the queue first */
926 trans_pcie->txq_ctx_active_msk = 0;
928 BUILD_BUG_ON(ARRAY_SIZE(iwlagn_default_queue_to_tx_fifo) <
929 IWLAGN_FIRST_AMPDU_QUEUE);
930 BUILD_BUG_ON(ARRAY_SIZE(iwlagn_ipan_queue_to_tx_fifo) <
931 IWLAGN_FIRST_AMPDU_QUEUE);
933 for (i = 0; i < IWLAGN_FIRST_AMPDU_QUEUE; i++) {
934 int fifo = queue_to_fifo[i].fifo;
935 int ac = queue_to_fifo[i].ac;
937 iwl_txq_ctx_activate(trans_pcie, i);
939 if (fifo == IWL_TX_FIFO_UNUSED)
942 if (ac != IWL_AC_UNSET)
943 iwl_set_swq_id(&trans_pcie->txq[i], ac, i);
944 iwl_trans_tx_queue_set_status(trans, &trans_pcie->txq[i],
948 spin_unlock_irqrestore(&trans->shrd->lock, flags);
950 /* Enable L1-Active */
951 iwl_clear_bits_prph(trans, APMG_PCIDEV_STT_REG,
952 APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
955 static void iwl_trans_pcie_fw_alive(struct iwl_trans *trans)
957 iwl_reset_ict(trans);
962 * iwlagn_txq_ctx_stop - Stop all Tx DMA channels
964 static int iwl_trans_tx_stop(struct iwl_trans *trans)
968 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
970 /* Turn off all Tx DMA fifos */
971 spin_lock_irqsave(&trans->shrd->lock, flags);
973 iwl_trans_txq_set_sched(trans, 0);
975 /* Stop each Tx DMA channel, and wait for it to be idle */
976 for (ch = 0; ch < FH_TCSR_CHNL_NUM; ch++) {
977 iwl_write_direct32(trans,
978 FH_TCSR_CHNL_TX_CONFIG_REG(ch), 0x0);
979 if (iwl_poll_direct_bit(trans, FH_TSSR_TX_STATUS_REG,
980 FH_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(ch),
982 IWL_ERR(trans, "Failing on timeout while stopping"
983 " DMA channel %d [0x%08x]", ch,
984 iwl_read_direct32(trans,
985 FH_TSSR_TX_STATUS_REG));
987 spin_unlock_irqrestore(&trans->shrd->lock, flags);
989 if (!trans_pcie->txq) {
990 IWL_WARN(trans, "Stopping tx queues that aren't allocated...");
994 /* Unmap DMA from host system and free skb's */
995 for (txq_id = 0; txq_id < hw_params(trans).max_txq_num; txq_id++)
996 iwl_tx_queue_unmap(trans, txq_id);
1001 static void iwl_trans_pcie_stop_device(struct iwl_trans *trans)
1003 unsigned long flags;
1004 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1006 /* tell the device to stop sending interrupts */
1007 spin_lock_irqsave(&trans->shrd->lock, flags);
1008 iwl_disable_interrupts(trans);
1009 spin_unlock_irqrestore(&trans->shrd->lock, flags);
1011 /* device going down, Stop using ICT table */
1012 iwl_disable_ict(trans);
1015 * If a HW restart happens during firmware loading,
1016 * then the firmware loading might call this function
1017 * and later it might be called again due to the
1018 * restart. So don't process again if the device is
1021 if (test_bit(STATUS_DEVICE_ENABLED, &trans->shrd->status)) {
1022 iwl_trans_tx_stop(trans);
1023 #ifndef CONFIG_IWLWIFI_IDI
1024 iwl_trans_rx_stop(trans);
1026 /* Power-down device's busmaster DMA clocks */
1027 iwl_write_prph(trans, APMG_CLK_DIS_REG,
1028 APMG_CLK_VAL_DMA_CLK_RQT);
1032 /* Make sure (redundant) we've released our request to stay awake */
1033 iwl_clear_bit(trans, CSR_GP_CNTRL,
1034 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
1036 /* Stop the device, and put it in low power state */
1037 iwl_apm_stop(priv(trans));
1039 /* Upon stop, the APM issues an interrupt if HW RF kill is set.
1040 * Clean again the interrupt here
1042 spin_lock_irqsave(&trans->shrd->lock, flags);
1043 iwl_disable_interrupts(trans);
1044 spin_unlock_irqrestore(&trans->shrd->lock, flags);
1046 /* wait to make sure we flush pending tasklet*/
1047 synchronize_irq(trans->irq);
1048 tasklet_kill(&trans_pcie->irq_tasklet);
1050 /* stop and reset the on-board processor */
1051 iwl_write32(trans, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
1054 static int iwl_trans_pcie_tx(struct iwl_trans *trans, struct sk_buff *skb,
1055 struct iwl_device_cmd *dev_cmd, enum iwl_rxon_context_id ctx,
1058 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1059 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1060 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1061 struct iwl_tx_cmd *tx_cmd = (struct iwl_tx_cmd *) dev_cmd->payload;
1062 struct iwl_cmd_meta *out_meta;
1063 struct iwl_tx_queue *txq;
1064 struct iwl_queue *q;
1066 dma_addr_t phys_addr = 0;
1067 dma_addr_t txcmd_phys;
1068 dma_addr_t scratch_phys;
1069 u16 len, firstlen, secondlen;
1070 u8 wait_write_ptr = 0;
1072 bool is_agg = false;
1073 __le16 fc = hdr->frame_control;
1074 u8 hdr_len = ieee80211_hdrlen(fc);
1075 u16 __maybe_unused wifi_seq;
1078 * Send this frame after DTIM -- there's a special queue
1079 * reserved for this for contexts that support AP mode.
1081 if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) {
1082 txq_id = trans_pcie->mcast_queue[ctx];
1085 * The microcode will clear the more data
1086 * bit in the last frame it transmits.
1088 hdr->frame_control |=
1089 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
1090 } else if (info->flags & IEEE80211_TX_CTL_TX_OFFCHAN)
1091 txq_id = IWL_AUX_QUEUE;
1094 trans_pcie->ac_to_queue[ctx][skb_get_queue_mapping(skb)];
1096 /* aggregation is on for this <sta,tid> */
1097 if (info->flags & IEEE80211_TX_CTL_AMPDU) {
1098 WARN_ON(tid >= IWL_MAX_TID_COUNT);
1099 txq_id = trans_pcie->agg_txq[sta_id][tid];
1103 txq = &trans_pcie->txq[txq_id];
1106 /* In AGG mode, the index in the ring must correspond to the WiFi
1107 * sequence number. This is a HW requirements to help the SCD to parse
1109 * Check here that the packets are in the right place on the ring.
1111 #ifdef CONFIG_IWLWIFI_DEBUG
1112 wifi_seq = SEQ_TO_SN(le16_to_cpu(hdr->seq_ctrl));
1113 WARN_ONCE(is_agg && ((wifi_seq & 0xff) != q->write_ptr),
1114 "Q: %d WiFi Seq %d tfdNum %d",
1115 txq_id, wifi_seq, q->write_ptr);
1118 /* Set up driver data for this TFD */
1119 txq->skbs[q->write_ptr] = skb;
1120 txq->cmd[q->write_ptr] = dev_cmd;
1122 dev_cmd->hdr.cmd = REPLY_TX;
1123 dev_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
1124 INDEX_TO_SEQ(q->write_ptr)));
1126 /* Set up first empty entry in queue's array of Tx/cmd buffers */
1127 out_meta = &txq->meta[q->write_ptr];
1130 * Use the first empty entry in this queue's command buffer array
1131 * to contain the Tx command and MAC header concatenated together
1132 * (payload data will be in another buffer).
1133 * Size of this varies, due to varying MAC header length.
1134 * If end is not dword aligned, we'll have 2 extra bytes at the end
1135 * of the MAC header (device reads on dword boundaries).
1136 * We'll tell device about this padding later.
1138 len = sizeof(struct iwl_tx_cmd) +
1139 sizeof(struct iwl_cmd_header) + hdr_len;
1140 firstlen = (len + 3) & ~3;
1142 /* Tell NIC about any 2-byte padding after MAC header */
1143 if (firstlen != len)
1144 tx_cmd->tx_flags |= TX_CMD_FLG_MH_PAD_MSK;
1146 /* Physical address of this Tx command's header (not MAC header!),
1147 * within command buffer array. */
1148 txcmd_phys = dma_map_single(trans->dev,
1149 &dev_cmd->hdr, firstlen,
1151 if (unlikely(dma_mapping_error(trans->dev, txcmd_phys)))
1153 dma_unmap_addr_set(out_meta, mapping, txcmd_phys);
1154 dma_unmap_len_set(out_meta, len, firstlen);
1156 if (!ieee80211_has_morefrags(fc)) {
1157 txq->need_update = 1;
1160 txq->need_update = 0;
1163 /* Set up TFD's 2nd entry to point directly to remainder of skb,
1164 * if any (802.11 null frames have no payload). */
1165 secondlen = skb->len - hdr_len;
1166 if (secondlen > 0) {
1167 phys_addr = dma_map_single(trans->dev, skb->data + hdr_len,
1168 secondlen, DMA_TO_DEVICE);
1169 if (unlikely(dma_mapping_error(trans->dev, phys_addr))) {
1170 dma_unmap_single(trans->dev,
1171 dma_unmap_addr(out_meta, mapping),
1172 dma_unmap_len(out_meta, len),
1178 /* Attach buffers to TFD */
1179 iwlagn_txq_attach_buf_to_tfd(trans, txq, txcmd_phys, firstlen, 1);
1181 iwlagn_txq_attach_buf_to_tfd(trans, txq, phys_addr,
1184 scratch_phys = txcmd_phys + sizeof(struct iwl_cmd_header) +
1185 offsetof(struct iwl_tx_cmd, scratch);
1187 /* take back ownership of DMA buffer to enable update */
1188 dma_sync_single_for_cpu(trans->dev, txcmd_phys, firstlen,
1190 tx_cmd->dram_lsb_ptr = cpu_to_le32(scratch_phys);
1191 tx_cmd->dram_msb_ptr = iwl_get_dma_hi_addr(scratch_phys);
1193 IWL_DEBUG_TX(trans, "sequence nr = 0X%x\n",
1194 le16_to_cpu(dev_cmd->hdr.sequence));
1195 IWL_DEBUG_TX(trans, "tx_flags = 0X%x\n", le32_to_cpu(tx_cmd->tx_flags));
1196 iwl_print_hex_dump(trans, IWL_DL_TX, (u8 *)tx_cmd, sizeof(*tx_cmd));
1197 iwl_print_hex_dump(trans, IWL_DL_TX, (u8 *)tx_cmd->hdr, hdr_len);
1199 /* Set up entry for this TFD in Tx byte-count array */
1200 iwl_trans_txq_update_byte_cnt_tbl(trans, txq, le16_to_cpu(tx_cmd->len));
1202 dma_sync_single_for_device(trans->dev, txcmd_phys, firstlen,
1205 trace_iwlwifi_dev_tx(priv(trans),
1206 &((struct iwl_tfd *)txq->tfds)[txq->q.write_ptr],
1207 sizeof(struct iwl_tfd),
1208 &dev_cmd->hdr, firstlen,
1209 skb->data + hdr_len, secondlen);
1211 /* Tell device the write index *just past* this latest filled TFD */
1212 q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
1213 iwl_txq_update_write_ptr(trans, txq);
1216 * At this point the frame is "transmitted" successfully
1217 * and we will get a TX status notification eventually,
1218 * regardless of the value of ret. "ret" only indicates
1219 * whether or not we should update the write pointer.
1221 if (iwl_queue_space(q) < q->high_mark) {
1222 if (wait_write_ptr) {
1223 txq->need_update = 1;
1224 iwl_txq_update_write_ptr(trans, txq);
1226 iwl_stop_queue(trans, txq, "Queue is full");
1232 static void iwl_trans_pcie_kick_nic(struct iwl_trans *trans)
1234 /* Remove all resets to allow NIC to operate */
1235 iwl_write32(trans, CSR_RESET, 0);
1238 static int iwl_trans_pcie_start_hw(struct iwl_trans *trans)
1240 struct iwl_trans_pcie *trans_pcie =
1241 IWL_TRANS_GET_PCIE_TRANS(trans);
1244 trans_pcie->inta_mask = CSR_INI_SET_MASK;
1246 if (!trans_pcie->irq_requested) {
1247 tasklet_init(&trans_pcie->irq_tasklet, (void (*)(unsigned long))
1248 iwl_irq_tasklet, (unsigned long)trans);
1250 iwl_alloc_isr_ict(trans);
1252 err = request_irq(trans->irq, iwl_isr_ict, IRQF_SHARED,
1255 IWL_ERR(trans, "Error allocating IRQ %d\n",
1257 iwl_free_isr_ict(trans);
1258 tasklet_kill(&trans_pcie->irq_tasklet);
1262 INIT_WORK(&trans_pcie->rx_replenish, iwl_bg_rx_replenish);
1263 trans_pcie->irq_requested = true;
1269 static int iwl_trans_pcie_reclaim(struct iwl_trans *trans, int sta_id, int tid,
1270 int txq_id, int ssn, u32 status,
1271 struct sk_buff_head *skbs)
1273 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1274 struct iwl_tx_queue *txq = &trans_pcie->txq[txq_id];
1275 /* n_bd is usually 256 => n_bd - 1 = 0xff */
1276 int tfd_num = ssn & (txq->q.n_bd - 1);
1279 txq->time_stamp = jiffies;
1281 if (unlikely(txq_id >= IWLAGN_FIRST_AMPDU_QUEUE &&
1282 txq_id != trans_pcie->agg_txq[sta_id][tid])) {
1284 * FIXME: this is a uCode bug which need to be addressed,
1285 * log the information and return for now.
1286 * Since it is can possibly happen very often and in order
1287 * not to fill the syslog, don't use IWL_ERR or IWL_WARN
1289 IWL_DEBUG_TX_QUEUES(trans, "Bad queue mapping txq_id %d, "
1290 "agg_txq[sta_id[tid] %d", txq_id,
1291 trans_pcie->agg_txq[sta_id][tid]);
1295 if (txq->q.read_ptr != tfd_num) {
1296 IWL_DEBUG_TX_REPLY(trans, "[Q %d | AC %d] %d -> %d (%d)\n",
1297 txq_id, iwl_get_queue_ac(txq), txq->q.read_ptr,
1299 freed = iwl_tx_queue_reclaim(trans, txq_id, tfd_num, skbs);
1300 if (iwl_queue_space(&txq->q) > txq->q.low_mark &&
1301 (!txq->sched_retry ||
1302 status != TX_STATUS_FAIL_PASSIVE_NO_RX))
1303 iwl_wake_queue(trans, txq, "Packets reclaimed");
1308 static void iwl_trans_pcie_write8(struct iwl_trans *trans, u32 ofs, u8 val)
1310 iowrite8(val, IWL_TRANS_GET_PCIE_TRANS(trans)->hw_base + ofs);
1313 static void iwl_trans_pcie_write32(struct iwl_trans *trans, u32 ofs, u32 val)
1315 iowrite32(val, IWL_TRANS_GET_PCIE_TRANS(trans)->hw_base + ofs);
1318 static u32 iwl_trans_pcie_read32(struct iwl_trans *trans, u32 ofs)
1320 u32 val = ioread32(IWL_TRANS_GET_PCIE_TRANS(trans)->hw_base + ofs);
1324 static void iwl_trans_pcie_free(struct iwl_trans *trans)
1326 struct iwl_trans_pcie *trans_pcie =
1327 IWL_TRANS_GET_PCIE_TRANS(trans);
1329 iwl_calib_free_results(trans);
1330 iwl_trans_pcie_tx_free(trans);
1331 #ifndef CONFIG_IWLWIFI_IDI
1332 iwl_trans_pcie_rx_free(trans);
1334 if (trans_pcie->irq_requested == true) {
1335 free_irq(trans->irq, trans);
1336 iwl_free_isr_ict(trans);
1339 pci_disable_msi(trans_pcie->pci_dev);
1340 pci_iounmap(trans_pcie->pci_dev, trans_pcie->hw_base);
1341 pci_release_regions(trans_pcie->pci_dev);
1342 pci_disable_device(trans_pcie->pci_dev);
1344 trans->shrd->trans = NULL;
1348 #ifdef CONFIG_PM_SLEEP
1349 static int iwl_trans_pcie_suspend(struct iwl_trans *trans)
1352 * This function is called when system goes into suspend state
1353 * mac80211 will call iwlagn_mac_stop() from the mac80211 suspend
1354 * function first but since iwlagn_mac_stop() has no knowledge of
1355 * who the caller is,
1356 * it will not call apm_ops.stop() to stop the DMA operation.
1357 * Calling apm_ops.stop here to make sure we stop the DMA.
1359 * But of course ... if we have configured WoWLAN then we did other
1360 * things already :-)
1362 if (!trans->shrd->wowlan) {
1363 iwl_apm_stop(priv(trans));
1365 iwl_disable_interrupts(trans);
1366 iwl_clear_bit(trans, CSR_GP_CNTRL,
1367 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
1373 static int iwl_trans_pcie_resume(struct iwl_trans *trans)
1375 bool hw_rfkill = false;
1377 iwl_enable_interrupts(trans);
1379 if (!(iwl_read32(trans, CSR_GP_CNTRL) &
1380 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
1384 set_bit(STATUS_RF_KILL_HW, &trans->shrd->status);
1386 clear_bit(STATUS_RF_KILL_HW, &trans->shrd->status);
1388 iwl_set_hw_rfkill_state(priv(trans), hw_rfkill);
1392 #endif /* CONFIG_PM_SLEEP */
1394 static void iwl_trans_pcie_wake_any_queue(struct iwl_trans *trans,
1395 enum iwl_rxon_context_id ctx,
1399 struct iwl_trans_pcie *trans_pcie =
1400 IWL_TRANS_GET_PCIE_TRANS(trans);
1402 for (ac = 0; ac < AC_NUM; ac++) {
1403 txq_id = trans_pcie->ac_to_queue[ctx][ac];
1404 IWL_DEBUG_TX_QUEUES(trans, "Queue Status: Q[%d] %s\n",
1406 (atomic_read(&trans_pcie->queue_stop_count[ac]) > 0)
1407 ? "stopped" : "awake");
1408 iwl_wake_queue(trans, &trans_pcie->txq[txq_id], msg);
1412 static void iwl_trans_pcie_stop_queue(struct iwl_trans *trans, int txq_id,
1415 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1417 iwl_stop_queue(trans, &trans_pcie->txq[txq_id], msg);
1420 #define IWL_FLUSH_WAIT_MS 2000
1422 static int iwl_trans_pcie_wait_tx_queue_empty(struct iwl_trans *trans)
1424 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1425 struct iwl_tx_queue *txq;
1426 struct iwl_queue *q;
1428 unsigned long now = jiffies;
1431 /* waiting for all the tx frames complete might take a while */
1432 for (cnt = 0; cnt < hw_params(trans).max_txq_num; cnt++) {
1433 if (cnt == trans->shrd->cmd_queue)
1435 txq = &trans_pcie->txq[cnt];
1437 while (q->read_ptr != q->write_ptr && !time_after(jiffies,
1438 now + msecs_to_jiffies(IWL_FLUSH_WAIT_MS)))
1441 if (q->read_ptr != q->write_ptr) {
1442 IWL_ERR(trans, "fail to flush all tx fifo queues\n");
1451 * On every watchdog tick we check (latest) time stamp. If it does not
1452 * change during timeout period and queue is not empty we reset firmware.
1454 static int iwl_trans_pcie_check_stuck_queue(struct iwl_trans *trans, int cnt)
1456 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1457 struct iwl_tx_queue *txq = &trans_pcie->txq[cnt];
1458 struct iwl_queue *q = &txq->q;
1459 unsigned long timeout;
1461 if (q->read_ptr == q->write_ptr) {
1462 txq->time_stamp = jiffies;
1466 timeout = txq->time_stamp +
1467 msecs_to_jiffies(hw_params(trans).wd_timeout);
1469 if (time_after(jiffies, timeout)) {
1470 IWL_ERR(trans, "Queue %d stuck for %u ms.\n", q->id,
1471 hw_params(trans).wd_timeout);
1472 IWL_ERR(trans, "Current SW read_ptr %d write_ptr %d\n",
1473 q->read_ptr, q->write_ptr);
1474 IWL_ERR(trans, "Current HW read_ptr %d write_ptr %d\n",
1475 iwl_read_prph(trans, SCD_QUEUE_RDPTR(cnt))
1476 & (TFD_QUEUE_SIZE_MAX - 1),
1477 iwl_read_prph(trans, SCD_QUEUE_WRPTR(cnt)));
1484 static const char *get_fh_string(int cmd)
1487 IWL_CMD(FH_RSCSR_CHNL0_STTS_WPTR_REG);
1488 IWL_CMD(FH_RSCSR_CHNL0_RBDCB_BASE_REG);
1489 IWL_CMD(FH_RSCSR_CHNL0_WPTR);
1490 IWL_CMD(FH_MEM_RCSR_CHNL0_CONFIG_REG);
1491 IWL_CMD(FH_MEM_RSSR_SHARED_CTRL_REG);
1492 IWL_CMD(FH_MEM_RSSR_RX_STATUS_REG);
1493 IWL_CMD(FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV);
1494 IWL_CMD(FH_TSSR_TX_STATUS_REG);
1495 IWL_CMD(FH_TSSR_TX_ERROR_REG);
1501 int iwl_dump_fh(struct iwl_trans *trans, char **buf, bool display)
1504 #ifdef CONFIG_IWLWIFI_DEBUG
1508 static const u32 fh_tbl[] = {
1509 FH_RSCSR_CHNL0_STTS_WPTR_REG,
1510 FH_RSCSR_CHNL0_RBDCB_BASE_REG,
1511 FH_RSCSR_CHNL0_WPTR,
1512 FH_MEM_RCSR_CHNL0_CONFIG_REG,
1513 FH_MEM_RSSR_SHARED_CTRL_REG,
1514 FH_MEM_RSSR_RX_STATUS_REG,
1515 FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV,
1516 FH_TSSR_TX_STATUS_REG,
1517 FH_TSSR_TX_ERROR_REG
1519 #ifdef CONFIG_IWLWIFI_DEBUG
1521 bufsz = ARRAY_SIZE(fh_tbl) * 48 + 40;
1522 *buf = kmalloc(bufsz, GFP_KERNEL);
1525 pos += scnprintf(*buf + pos, bufsz - pos,
1526 "FH register values:\n");
1527 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) {
1528 pos += scnprintf(*buf + pos, bufsz - pos,
1530 get_fh_string(fh_tbl[i]),
1531 iwl_read_direct32(trans, fh_tbl[i]));
1536 IWL_ERR(trans, "FH register values:\n");
1537 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) {
1538 IWL_ERR(trans, " %34s: 0X%08x\n",
1539 get_fh_string(fh_tbl[i]),
1540 iwl_read_direct32(trans, fh_tbl[i]));
1545 static const char *get_csr_string(int cmd)
1548 IWL_CMD(CSR_HW_IF_CONFIG_REG);
1549 IWL_CMD(CSR_INT_COALESCING);
1551 IWL_CMD(CSR_INT_MASK);
1552 IWL_CMD(CSR_FH_INT_STATUS);
1553 IWL_CMD(CSR_GPIO_IN);
1555 IWL_CMD(CSR_GP_CNTRL);
1556 IWL_CMD(CSR_HW_REV);
1557 IWL_CMD(CSR_EEPROM_REG);
1558 IWL_CMD(CSR_EEPROM_GP);
1559 IWL_CMD(CSR_OTP_GP_REG);
1560 IWL_CMD(CSR_GIO_REG);
1561 IWL_CMD(CSR_GP_UCODE_REG);
1562 IWL_CMD(CSR_GP_DRIVER_REG);
1563 IWL_CMD(CSR_UCODE_DRV_GP1);
1564 IWL_CMD(CSR_UCODE_DRV_GP2);
1565 IWL_CMD(CSR_LED_REG);
1566 IWL_CMD(CSR_DRAM_INT_TBL_REG);
1567 IWL_CMD(CSR_GIO_CHICKEN_BITS);
1568 IWL_CMD(CSR_ANA_PLL_CFG);
1569 IWL_CMD(CSR_HW_REV_WA_REG);
1570 IWL_CMD(CSR_DBG_HPET_MEM_REG);
1576 void iwl_dump_csr(struct iwl_trans *trans)
1579 static const u32 csr_tbl[] = {
1580 CSR_HW_IF_CONFIG_REG,
1598 CSR_DRAM_INT_TBL_REG,
1599 CSR_GIO_CHICKEN_BITS,
1602 CSR_DBG_HPET_MEM_REG
1604 IWL_ERR(trans, "CSR values:\n");
1605 IWL_ERR(trans, "(2nd byte of CSR_INT_COALESCING is "
1606 "CSR_INT_PERIODIC_REG)\n");
1607 for (i = 0; i < ARRAY_SIZE(csr_tbl); i++) {
1608 IWL_ERR(trans, " %25s: 0X%08x\n",
1609 get_csr_string(csr_tbl[i]),
1610 iwl_read32(trans, csr_tbl[i]));
1614 #ifdef CONFIG_IWLWIFI_DEBUGFS
1615 /* create and remove of files */
1616 #define DEBUGFS_ADD_FILE(name, parent, mode) do { \
1617 if (!debugfs_create_file(#name, mode, parent, trans, \
1618 &iwl_dbgfs_##name##_ops)) \
1622 /* file operation */
1623 #define DEBUGFS_READ_FUNC(name) \
1624 static ssize_t iwl_dbgfs_##name##_read(struct file *file, \
1625 char __user *user_buf, \
1626 size_t count, loff_t *ppos);
1628 #define DEBUGFS_WRITE_FUNC(name) \
1629 static ssize_t iwl_dbgfs_##name##_write(struct file *file, \
1630 const char __user *user_buf, \
1631 size_t count, loff_t *ppos);
1634 static int iwl_dbgfs_open_file_generic(struct inode *inode, struct file *file)
1636 file->private_data = inode->i_private;
1640 #define DEBUGFS_READ_FILE_OPS(name) \
1641 DEBUGFS_READ_FUNC(name); \
1642 static const struct file_operations iwl_dbgfs_##name##_ops = { \
1643 .read = iwl_dbgfs_##name##_read, \
1644 .open = iwl_dbgfs_open_file_generic, \
1645 .llseek = generic_file_llseek, \
1648 #define DEBUGFS_WRITE_FILE_OPS(name) \
1649 DEBUGFS_WRITE_FUNC(name); \
1650 static const struct file_operations iwl_dbgfs_##name##_ops = { \
1651 .write = iwl_dbgfs_##name##_write, \
1652 .open = iwl_dbgfs_open_file_generic, \
1653 .llseek = generic_file_llseek, \
1656 #define DEBUGFS_READ_WRITE_FILE_OPS(name) \
1657 DEBUGFS_READ_FUNC(name); \
1658 DEBUGFS_WRITE_FUNC(name); \
1659 static const struct file_operations iwl_dbgfs_##name##_ops = { \
1660 .write = iwl_dbgfs_##name##_write, \
1661 .read = iwl_dbgfs_##name##_read, \
1662 .open = iwl_dbgfs_open_file_generic, \
1663 .llseek = generic_file_llseek, \
1666 static ssize_t iwl_dbgfs_tx_queue_read(struct file *file,
1667 char __user *user_buf,
1668 size_t count, loff_t *ppos)
1670 struct iwl_trans *trans = file->private_data;
1671 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1672 struct iwl_tx_queue *txq;
1673 struct iwl_queue *q;
1678 const size_t bufsz = sizeof(char) * 64 * hw_params(trans).max_txq_num;
1680 if (!trans_pcie->txq) {
1681 IWL_ERR(trans, "txq not ready\n");
1684 buf = kzalloc(bufsz, GFP_KERNEL);
1688 for (cnt = 0; cnt < hw_params(trans).max_txq_num; cnt++) {
1689 txq = &trans_pcie->txq[cnt];
1691 pos += scnprintf(buf + pos, bufsz - pos,
1692 "hwq %.2d: read=%u write=%u stop=%d"
1693 " swq_id=%#.2x (ac %d/hwq %d)\n",
1694 cnt, q->read_ptr, q->write_ptr,
1695 !!test_bit(cnt, trans_pcie->queue_stopped),
1696 txq->swq_id, txq->swq_id & 3,
1697 (txq->swq_id >> 2) & 0x1f);
1700 /* for the ACs, display the stop count too */
1701 pos += scnprintf(buf + pos, bufsz - pos,
1702 " stop-count: %d\n",
1703 atomic_read(&trans_pcie->queue_stop_count[cnt]));
1705 ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
1710 static ssize_t iwl_dbgfs_rx_queue_read(struct file *file,
1711 char __user *user_buf,
1712 size_t count, loff_t *ppos) {
1713 struct iwl_trans *trans = file->private_data;
1714 struct iwl_trans_pcie *trans_pcie =
1715 IWL_TRANS_GET_PCIE_TRANS(trans);
1716 struct iwl_rx_queue *rxq = &trans_pcie->rxq;
1719 const size_t bufsz = sizeof(buf);
1721 pos += scnprintf(buf + pos, bufsz - pos, "read: %u\n",
1723 pos += scnprintf(buf + pos, bufsz - pos, "write: %u\n",
1725 pos += scnprintf(buf + pos, bufsz - pos, "free_count: %u\n",
1728 pos += scnprintf(buf + pos, bufsz - pos, "closed_rb_num: %u\n",
1729 le16_to_cpu(rxq->rb_stts->closed_rb_num) & 0x0FFF);
1731 pos += scnprintf(buf + pos, bufsz - pos,
1732 "closed_rb_num: Not Allocated\n");
1734 return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
1737 static ssize_t iwl_dbgfs_log_event_read(struct file *file,
1738 char __user *user_buf,
1739 size_t count, loff_t *ppos)
1741 struct iwl_trans *trans = file->private_data;
1744 ssize_t ret = -ENOMEM;
1746 ret = pos = iwl_dump_nic_event_log(trans, true, &buf, true);
1748 ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
1754 static ssize_t iwl_dbgfs_log_event_write(struct file *file,
1755 const char __user *user_buf,
1756 size_t count, loff_t *ppos)
1758 struct iwl_trans *trans = file->private_data;
1763 memset(buf, 0, sizeof(buf));
1764 buf_size = min(count, sizeof(buf) - 1);
1765 if (copy_from_user(buf, user_buf, buf_size))
1767 if (sscanf(buf, "%d", &event_log_flag) != 1)
1769 if (event_log_flag == 1)
1770 iwl_dump_nic_event_log(trans, true, NULL, false);
1775 static ssize_t iwl_dbgfs_interrupt_read(struct file *file,
1776 char __user *user_buf,
1777 size_t count, loff_t *ppos) {
1779 struct iwl_trans *trans = file->private_data;
1780 struct iwl_trans_pcie *trans_pcie =
1781 IWL_TRANS_GET_PCIE_TRANS(trans);
1782 struct isr_statistics *isr_stats = &trans_pcie->isr_stats;
1786 int bufsz = 24 * 64; /* 24 items * 64 char per item */
1789 buf = kzalloc(bufsz, GFP_KERNEL);
1791 IWL_ERR(trans, "Can not allocate Buffer\n");
1795 pos += scnprintf(buf + pos, bufsz - pos,
1796 "Interrupt Statistics Report:\n");
1798 pos += scnprintf(buf + pos, bufsz - pos, "HW Error:\t\t\t %u\n",
1800 pos += scnprintf(buf + pos, bufsz - pos, "SW Error:\t\t\t %u\n",
1802 if (isr_stats->sw || isr_stats->hw) {
1803 pos += scnprintf(buf + pos, bufsz - pos,
1804 "\tLast Restarting Code: 0x%X\n",
1805 isr_stats->err_code);
1807 #ifdef CONFIG_IWLWIFI_DEBUG
1808 pos += scnprintf(buf + pos, bufsz - pos, "Frame transmitted:\t\t %u\n",
1810 pos += scnprintf(buf + pos, bufsz - pos, "Alive interrupt:\t\t %u\n",
1813 pos += scnprintf(buf + pos, bufsz - pos,
1814 "HW RF KILL switch toggled:\t %u\n", isr_stats->rfkill);
1816 pos += scnprintf(buf + pos, bufsz - pos, "CT KILL:\t\t\t %u\n",
1819 pos += scnprintf(buf + pos, bufsz - pos, "Wakeup Interrupt:\t\t %u\n",
1822 pos += scnprintf(buf + pos, bufsz - pos,
1823 "Rx command responses:\t\t %u\n", isr_stats->rx);
1825 pos += scnprintf(buf + pos, bufsz - pos, "Tx/FH interrupt:\t\t %u\n",
1828 pos += scnprintf(buf + pos, bufsz - pos, "Unexpected INTA:\t\t %u\n",
1829 isr_stats->unhandled);
1831 ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
1836 static ssize_t iwl_dbgfs_interrupt_write(struct file *file,
1837 const char __user *user_buf,
1838 size_t count, loff_t *ppos)
1840 struct iwl_trans *trans = file->private_data;
1841 struct iwl_trans_pcie *trans_pcie =
1842 IWL_TRANS_GET_PCIE_TRANS(trans);
1843 struct isr_statistics *isr_stats = &trans_pcie->isr_stats;
1849 memset(buf, 0, sizeof(buf));
1850 buf_size = min(count, sizeof(buf) - 1);
1851 if (copy_from_user(buf, user_buf, buf_size))
1853 if (sscanf(buf, "%x", &reset_flag) != 1)
1855 if (reset_flag == 0)
1856 memset(isr_stats, 0, sizeof(*isr_stats));
1861 static ssize_t iwl_dbgfs_csr_write(struct file *file,
1862 const char __user *user_buf,
1863 size_t count, loff_t *ppos)
1865 struct iwl_trans *trans = file->private_data;
1870 memset(buf, 0, sizeof(buf));
1871 buf_size = min(count, sizeof(buf) - 1);
1872 if (copy_from_user(buf, user_buf, buf_size))
1874 if (sscanf(buf, "%d", &csr) != 1)
1877 iwl_dump_csr(trans);
1882 static ssize_t iwl_dbgfs_fh_reg_read(struct file *file,
1883 char __user *user_buf,
1884 size_t count, loff_t *ppos)
1886 struct iwl_trans *trans = file->private_data;
1889 ssize_t ret = -EFAULT;
1891 ret = pos = iwl_dump_fh(trans, &buf, true);
1893 ret = simple_read_from_buffer(user_buf,
1894 count, ppos, buf, pos);
1901 DEBUGFS_READ_WRITE_FILE_OPS(log_event);
1902 DEBUGFS_READ_WRITE_FILE_OPS(interrupt);
1903 DEBUGFS_READ_FILE_OPS(fh_reg);
1904 DEBUGFS_READ_FILE_OPS(rx_queue);
1905 DEBUGFS_READ_FILE_OPS(tx_queue);
1906 DEBUGFS_WRITE_FILE_OPS(csr);
1909 * Create the debugfs files and directories
1912 static int iwl_trans_pcie_dbgfs_register(struct iwl_trans *trans,
1915 DEBUGFS_ADD_FILE(rx_queue, dir, S_IRUSR);
1916 DEBUGFS_ADD_FILE(tx_queue, dir, S_IRUSR);
1917 DEBUGFS_ADD_FILE(log_event, dir, S_IWUSR | S_IRUSR);
1918 DEBUGFS_ADD_FILE(interrupt, dir, S_IWUSR | S_IRUSR);
1919 DEBUGFS_ADD_FILE(csr, dir, S_IWUSR);
1920 DEBUGFS_ADD_FILE(fh_reg, dir, S_IRUSR);
1924 static int iwl_trans_pcie_dbgfs_register(struct iwl_trans *trans,
1928 #endif /*CONFIG_IWLWIFI_DEBUGFS */
1930 const struct iwl_trans_ops trans_ops_pcie = {
1931 .start_hw = iwl_trans_pcie_start_hw,
1932 .fw_alive = iwl_trans_pcie_fw_alive,
1933 .start_device = iwl_trans_pcie_start_device,
1934 .prepare_card_hw = iwl_trans_pcie_prepare_card_hw,
1935 .stop_device = iwl_trans_pcie_stop_device,
1937 .wake_any_queue = iwl_trans_pcie_wake_any_queue,
1939 .send_cmd = iwl_trans_pcie_send_cmd,
1941 .tx = iwl_trans_pcie_tx,
1942 .reclaim = iwl_trans_pcie_reclaim,
1944 .tx_agg_disable = iwl_trans_pcie_tx_agg_disable,
1945 .tx_agg_alloc = iwl_trans_pcie_tx_agg_alloc,
1946 .tx_agg_setup = iwl_trans_pcie_tx_agg_setup,
1948 .kick_nic = iwl_trans_pcie_kick_nic,
1950 .free = iwl_trans_pcie_free,
1951 .stop_queue = iwl_trans_pcie_stop_queue,
1953 .dbgfs_register = iwl_trans_pcie_dbgfs_register,
1955 .wait_tx_queue_empty = iwl_trans_pcie_wait_tx_queue_empty,
1956 .check_stuck_queue = iwl_trans_pcie_check_stuck_queue,
1958 #ifdef CONFIG_PM_SLEEP
1959 .suspend = iwl_trans_pcie_suspend,
1960 .resume = iwl_trans_pcie_resume,
1962 .write8 = iwl_trans_pcie_write8,
1963 .write32 = iwl_trans_pcie_write32,
1964 .read32 = iwl_trans_pcie_read32,
1968 #define PCI_CFG_RETRY_TIMEOUT 0x041
1970 struct iwl_trans *iwl_trans_pcie_alloc(struct iwl_shared *shrd,
1971 struct pci_dev *pdev,
1972 const struct pci_device_id *ent)
1974 struct iwl_trans_pcie *trans_pcie;
1975 struct iwl_trans *trans;
1979 trans = kzalloc(sizeof(struct iwl_trans) +
1980 sizeof(struct iwl_trans_pcie), GFP_KERNEL);
1982 if (WARN_ON(!trans))
1985 trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1987 trans->ops = &trans_ops_pcie;
1989 trans_pcie->trans = trans;
1990 spin_lock_init(&trans->hcmd_lock);
1992 /* W/A - seems to solve weird behavior. We need to remove this if we
1993 * don't want to stay in L1 all the time. This wastes a lot of power */
1994 pci_disable_link_state(pdev, PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1 |
1995 PCIE_LINK_STATE_CLKPM);
1997 if (pci_enable_device(pdev)) {
2002 pci_set_master(pdev);
2004 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(36));
2006 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(36));
2008 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
2010 err = pci_set_consistent_dma_mask(pdev,
2012 /* both attempts failed: */
2014 dev_printk(KERN_ERR, &pdev->dev,
2015 "No suitable DMA available.\n");
2016 goto out_pci_disable_device;
2020 err = pci_request_regions(pdev, DRV_NAME);
2022 dev_printk(KERN_ERR, &pdev->dev, "pci_request_regions failed");
2023 goto out_pci_disable_device;
2026 trans_pcie->hw_base = pci_iomap(pdev, 0, 0);
2027 if (!trans_pcie->hw_base) {
2028 dev_printk(KERN_ERR, &pdev->dev, "pci_iomap failed");
2030 goto out_pci_release_regions;
2033 dev_printk(KERN_INFO, &pdev->dev,
2034 "pci_resource_len = 0x%08llx\n",
2035 (unsigned long long) pci_resource_len(pdev, 0));
2036 dev_printk(KERN_INFO, &pdev->dev,
2037 "pci_resource_base = %p\n", trans_pcie->hw_base);
2039 dev_printk(KERN_INFO, &pdev->dev,
2040 "HW Revision ID = 0x%X\n", pdev->revision);
2042 /* We disable the RETRY_TIMEOUT register (0x41) to keep
2043 * PCI Tx retries from interfering with C3 CPU state */
2044 pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
2046 err = pci_enable_msi(pdev);
2048 dev_printk(KERN_ERR, &pdev->dev,
2049 "pci_enable_msi failed(0X%x)", err);
2051 trans->dev = &pdev->dev;
2052 trans->irq = pdev->irq;
2053 trans_pcie->pci_dev = pdev;
2055 /* TODO: Move this away, not needed if not MSI */
2056 /* enable rfkill interrupt: hw bug w/a */
2057 pci_read_config_word(pdev, PCI_COMMAND, &pci_cmd);
2058 if (pci_cmd & PCI_COMMAND_INTX_DISABLE) {
2059 pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
2060 pci_write_config_word(pdev, PCI_COMMAND, pci_cmd);
2065 out_pci_release_regions:
2066 pci_release_regions(pdev);
2067 out_pci_disable_device:
2068 pci_disable_device(pdev);