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,
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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"
79 static int iwl_trans_rx_alloc(struct iwl_trans *trans)
81 struct iwl_trans_pcie *trans_pcie =
82 IWL_TRANS_GET_PCIE_TRANS(trans);
83 struct iwl_rx_queue *rxq = &trans_pcie->rxq;
84 struct device *dev = trans->dev;
86 memset(&trans_pcie->rxq, 0, sizeof(trans_pcie->rxq));
88 spin_lock_init(&rxq->lock);
90 if (WARN_ON(rxq->bd || rxq->rb_stts))
93 /* Allocate the circular buffer of Read Buffer Descriptors (RBDs) */
94 rxq->bd = dma_zalloc_coherent(dev, sizeof(__le32) * RX_QUEUE_SIZE,
95 &rxq->bd_dma, GFP_KERNEL);
99 /*Allocate the driver's pointer to receive buffer status */
100 rxq->rb_stts = dma_zalloc_coherent(dev, sizeof(*rxq->rb_stts),
101 &rxq->rb_stts_dma, GFP_KERNEL);
108 dma_free_coherent(dev, sizeof(__le32) * RX_QUEUE_SIZE,
109 rxq->bd, rxq->bd_dma);
110 memset(&rxq->bd_dma, 0, sizeof(rxq->bd_dma));
116 static void iwl_trans_rxq_free_rx_bufs(struct iwl_trans *trans)
118 struct iwl_trans_pcie *trans_pcie =
119 IWL_TRANS_GET_PCIE_TRANS(trans);
120 struct iwl_rx_queue *rxq = &trans_pcie->rxq;
123 /* Fill the rx_used queue with _all_ of the Rx buffers */
124 for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
125 /* In the reset function, these buffers may have been allocated
126 * to an SKB, so we need to unmap and free potential storage */
127 if (rxq->pool[i].page != NULL) {
128 dma_unmap_page(trans->dev, rxq->pool[i].page_dma,
129 PAGE_SIZE << hw_params(trans).rx_page_order,
131 __free_pages(rxq->pool[i].page,
132 hw_params(trans).rx_page_order);
133 rxq->pool[i].page = NULL;
135 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
139 static void iwl_trans_rx_hw_init(struct iwl_trans *trans,
140 struct iwl_rx_queue *rxq)
143 const u32 rfdnlog = RX_QUEUE_SIZE_LOG; /* 256 RBDs */
144 u32 rb_timeout = RX_RB_TIMEOUT; /* FIXME: RX_RB_TIMEOUT for all devices? */
146 if (iwlagn_mod_params.amsdu_size_8K)
147 rb_size = FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_8K;
149 rb_size = FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_4K;
152 iwl_write_direct32(trans, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0);
154 /* Reset driver's Rx queue write index */
155 iwl_write_direct32(trans, FH_RSCSR_CHNL0_RBDCB_WPTR_REG, 0);
157 /* Tell device where to find RBD circular buffer in DRAM */
158 iwl_write_direct32(trans, FH_RSCSR_CHNL0_RBDCB_BASE_REG,
159 (u32)(rxq->bd_dma >> 8));
161 /* Tell device where in DRAM to update its Rx status */
162 iwl_write_direct32(trans, FH_RSCSR_CHNL0_STTS_WPTR_REG,
163 rxq->rb_stts_dma >> 4);
166 * FH_RCSR_CHNL0_RX_IGNORE_RXF_EMPTY is set because of HW bug in
167 * the credit mechanism in 5000 HW RX FIFO
168 * Direct rx interrupts to hosts
169 * Rx buffer size 4 or 8k
173 iwl_write_direct32(trans, FH_MEM_RCSR_CHNL0_CONFIG_REG,
174 FH_RCSR_RX_CONFIG_CHNL_EN_ENABLE_VAL |
175 FH_RCSR_CHNL0_RX_IGNORE_RXF_EMPTY |
176 FH_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_INT_HOST_VAL |
177 FH_RCSR_CHNL0_RX_CONFIG_SINGLE_FRAME_MSK |
179 (rb_timeout << FH_RCSR_RX_CONFIG_REG_IRQ_RBTH_POS)|
180 (rfdnlog << FH_RCSR_RX_CONFIG_RBDCB_SIZE_POS));
182 /* Set interrupt coalescing timer to default (2048 usecs) */
183 iwl_write8(trans, CSR_INT_COALESCING, IWL_HOST_INT_TIMEOUT_DEF);
186 static int iwl_rx_init(struct iwl_trans *trans)
188 struct iwl_trans_pcie *trans_pcie =
189 IWL_TRANS_GET_PCIE_TRANS(trans);
190 struct iwl_rx_queue *rxq = &trans_pcie->rxq;
196 err = iwl_trans_rx_alloc(trans);
201 spin_lock_irqsave(&rxq->lock, flags);
202 INIT_LIST_HEAD(&rxq->rx_free);
203 INIT_LIST_HEAD(&rxq->rx_used);
205 iwl_trans_rxq_free_rx_bufs(trans);
207 for (i = 0; i < RX_QUEUE_SIZE; i++)
208 rxq->queue[i] = NULL;
210 /* Set us so that we have processed and used all buffers, but have
211 * not restocked the Rx queue with fresh buffers */
212 rxq->read = rxq->write = 0;
213 rxq->write_actual = 0;
215 spin_unlock_irqrestore(&rxq->lock, flags);
217 iwlagn_rx_replenish(trans);
219 iwl_trans_rx_hw_init(trans, rxq);
221 spin_lock_irqsave(&trans->shrd->lock, flags);
222 rxq->need_update = 1;
223 iwl_rx_queue_update_write_ptr(trans, rxq);
224 spin_unlock_irqrestore(&trans->shrd->lock, flags);
229 static void iwl_trans_pcie_rx_free(struct iwl_trans *trans)
231 struct iwl_trans_pcie *trans_pcie =
232 IWL_TRANS_GET_PCIE_TRANS(trans);
233 struct iwl_rx_queue *rxq = &trans_pcie->rxq;
237 /*if rxq->bd is NULL, it means that nothing has been allocated,
240 IWL_DEBUG_INFO(trans, "Free NULL rx context\n");
244 spin_lock_irqsave(&rxq->lock, flags);
245 iwl_trans_rxq_free_rx_bufs(trans);
246 spin_unlock_irqrestore(&rxq->lock, flags);
248 dma_free_coherent(trans->dev, sizeof(__le32) * RX_QUEUE_SIZE,
249 rxq->bd, rxq->bd_dma);
250 memset(&rxq->bd_dma, 0, sizeof(rxq->bd_dma));
254 dma_free_coherent(trans->dev,
255 sizeof(struct iwl_rb_status),
256 rxq->rb_stts, rxq->rb_stts_dma);
258 IWL_DEBUG_INFO(trans, "Free rxq->rb_stts which is NULL\n");
259 memset(&rxq->rb_stts_dma, 0, sizeof(rxq->rb_stts_dma));
263 static int iwl_trans_rx_stop(struct iwl_trans *trans)
267 iwl_write_direct32(trans, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0);
268 return iwl_poll_direct_bit(trans, FH_MEM_RSSR_RX_STATUS_REG,
269 FH_RSSR_CHNL0_RX_STATUS_CHNL_IDLE, 1000);
272 static inline int iwlagn_alloc_dma_ptr(struct iwl_trans *trans,
273 struct iwl_dma_ptr *ptr, size_t size)
275 if (WARN_ON(ptr->addr))
278 ptr->addr = dma_alloc_coherent(trans->dev, size,
279 &ptr->dma, GFP_KERNEL);
286 static inline void iwlagn_free_dma_ptr(struct iwl_trans *trans,
287 struct iwl_dma_ptr *ptr)
289 if (unlikely(!ptr->addr))
292 dma_free_coherent(trans->dev, ptr->size, ptr->addr, ptr->dma);
293 memset(ptr, 0, sizeof(*ptr));
296 static int iwl_trans_txq_alloc(struct iwl_trans *trans,
297 struct iwl_tx_queue *txq, int slots_num,
300 size_t tfd_sz = sizeof(struct iwl_tfd) * TFD_QUEUE_SIZE_MAX;
303 if (WARN_ON(txq->meta || txq->cmd || txq->skbs || txq->tfds))
306 txq->q.n_window = slots_num;
308 txq->meta = kcalloc(slots_num, sizeof(txq->meta[0]), GFP_KERNEL);
309 txq->cmd = kcalloc(slots_num, sizeof(txq->cmd[0]), GFP_KERNEL);
311 if (!txq->meta || !txq->cmd)
314 if (txq_id == trans->shrd->cmd_queue)
315 for (i = 0; i < slots_num; i++) {
316 txq->cmd[i] = kmalloc(sizeof(struct iwl_device_cmd),
322 /* Alloc driver data array and TFD circular buffer */
323 /* Driver private data, only for Tx (not command) queues,
324 * not shared with device. */
325 if (txq_id != trans->shrd->cmd_queue) {
326 txq->skbs = kcalloc(TFD_QUEUE_SIZE_MAX, sizeof(txq->skbs[0]),
329 IWL_ERR(trans, "kmalloc for auxiliary BD "
330 "structures failed\n");
337 /* Circular buffer of transmit frame descriptors (TFDs),
338 * shared with device */
339 txq->tfds = dma_alloc_coherent(trans->dev, tfd_sz,
340 &txq->q.dma_addr, GFP_KERNEL);
342 IWL_ERR(trans, "dma_alloc_coherent(%zd) failed\n", tfd_sz);
351 /* since txq->cmd has been zeroed,
352 * all non allocated cmd[i] will be NULL */
353 if (txq->cmd && txq_id == trans->shrd->cmd_queue)
354 for (i = 0; i < slots_num; i++)
365 static int iwl_trans_txq_init(struct iwl_trans *trans, struct iwl_tx_queue *txq,
366 int slots_num, u32 txq_id)
370 txq->need_update = 0;
371 memset(txq->meta, 0, sizeof(txq->meta[0]) * slots_num);
374 * For the default queues 0-3, set up the swq_id
375 * already -- all others need to get one later
376 * (if they need one at all).
379 iwl_set_swq_id(txq, txq_id, txq_id);
381 /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
382 * iwl_queue_inc_wrap and iwl_queue_dec_wrap are broken. */
383 BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
385 /* Initialize queue's high/low-water marks, and head/tail indexes */
386 ret = iwl_queue_init(&txq->q, TFD_QUEUE_SIZE_MAX, slots_num,
392 * Tell nic where to find circular buffer of Tx Frame Descriptors for
393 * given Tx queue, and enable the DMA channel used for that queue.
394 * Circular buffer (TFD queue in DRAM) physical base address */
395 iwl_write_direct32(trans, FH_MEM_CBBC_QUEUE(txq_id),
396 txq->q.dma_addr >> 8);
402 * iwl_tx_queue_unmap - Unmap any remaining DMA mappings and free skb's
404 static void iwl_tx_queue_unmap(struct iwl_trans *trans, int txq_id)
406 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
407 struct iwl_tx_queue *txq = &trans_pcie->txq[txq_id];
408 struct iwl_queue *q = &txq->q;
409 enum dma_data_direction dma_dir;
416 /* In the command queue, all the TBs are mapped as BIDI
417 * so unmap them as such.
419 if (txq_id == trans->shrd->cmd_queue) {
420 dma_dir = DMA_BIDIRECTIONAL;
421 lock = &trans->hcmd_lock;
423 dma_dir = DMA_TO_DEVICE;
424 lock = &trans->shrd->sta_lock;
427 spin_lock_irqsave(lock, flags);
428 while (q->write_ptr != q->read_ptr) {
429 /* The read_ptr needs to bound by q->n_window */
430 iwlagn_txq_free_tfd(trans, txq, get_cmd_index(q, q->read_ptr),
432 q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd);
434 spin_unlock_irqrestore(lock, flags);
438 * iwl_tx_queue_free - Deallocate DMA queue.
439 * @txq: Transmit queue to deallocate.
441 * Empty queue by removing and destroying all BD's.
443 * 0-fill, but do not free "txq" descriptor structure.
445 static void iwl_tx_queue_free(struct iwl_trans *trans, int txq_id)
447 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
448 struct iwl_tx_queue *txq = &trans_pcie->txq[txq_id];
449 struct device *dev = trans->dev;
454 iwl_tx_queue_unmap(trans, txq_id);
456 /* De-alloc array of command/tx buffers */
458 if (txq_id == trans->shrd->cmd_queue)
459 for (i = 0; i < txq->q.n_window; i++)
462 /* De-alloc circular buffer of TFDs */
464 dma_free_coherent(dev, sizeof(struct iwl_tfd) *
465 txq->q.n_bd, txq->tfds, txq->q.dma_addr);
466 memset(&txq->q.dma_addr, 0, sizeof(txq->q.dma_addr));
469 /* De-alloc array of per-TFD driver data */
473 /* deallocate arrays */
479 /* 0-fill queue descriptor structure */
480 memset(txq, 0, sizeof(*txq));
484 * iwl_trans_tx_free - Free TXQ Context
486 * Destroy all TX DMA queues and structures
488 static void iwl_trans_pcie_tx_free(struct iwl_trans *trans)
491 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
494 if (trans_pcie->txq) {
496 txq_id < hw_params(trans).max_txq_num; txq_id++)
497 iwl_tx_queue_free(trans, txq_id);
500 kfree(trans_pcie->txq);
501 trans_pcie->txq = NULL;
503 iwlagn_free_dma_ptr(trans, &trans_pcie->kw);
505 iwlagn_free_dma_ptr(trans, &trans_pcie->scd_bc_tbls);
509 * iwl_trans_tx_alloc - allocate TX context
510 * Allocate all Tx DMA structures and initialize them
515 static int iwl_trans_tx_alloc(struct iwl_trans *trans)
518 int txq_id, slots_num;
519 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
521 u16 scd_bc_tbls_size = hw_params(trans).max_txq_num *
522 sizeof(struct iwlagn_scd_bc_tbl);
524 /*It is not allowed to alloc twice, so warn when this happens.
525 * We cannot rely on the previous allocation, so free and fail */
526 if (WARN_ON(trans_pcie->txq)) {
531 ret = iwlagn_alloc_dma_ptr(trans, &trans_pcie->scd_bc_tbls,
534 IWL_ERR(trans, "Scheduler BC Table allocation failed\n");
538 /* Alloc keep-warm buffer */
539 ret = iwlagn_alloc_dma_ptr(trans, &trans_pcie->kw, IWL_KW_SIZE);
541 IWL_ERR(trans, "Keep Warm allocation failed\n");
545 trans_pcie->txq = kcalloc(hw_params(trans).max_txq_num,
546 sizeof(struct iwl_tx_queue), GFP_KERNEL);
547 if (!trans_pcie->txq) {
548 IWL_ERR(trans, "Not enough memory for txq\n");
553 /* Alloc and init all Tx queues, including the command queue (#4/#9) */
554 for (txq_id = 0; txq_id < hw_params(trans).max_txq_num; txq_id++) {
555 slots_num = (txq_id == trans->shrd->cmd_queue) ?
556 TFD_CMD_SLOTS : TFD_TX_CMD_SLOTS;
557 ret = iwl_trans_txq_alloc(trans, &trans_pcie->txq[txq_id],
560 IWL_ERR(trans, "Tx %d queue alloc failed\n", txq_id);
568 iwl_trans_pcie_tx_free(trans);
572 static int iwl_tx_init(struct iwl_trans *trans)
575 int txq_id, slots_num;
578 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
580 if (!trans_pcie->txq) {
581 ret = iwl_trans_tx_alloc(trans);
587 spin_lock_irqsave(&trans->shrd->lock, flags);
589 /* Turn off all Tx DMA fifos */
590 iwl_write_prph(trans, SCD_TXFACT, 0);
592 /* Tell NIC where to find the "keep warm" buffer */
593 iwl_write_direct32(trans, FH_KW_MEM_ADDR_REG,
594 trans_pcie->kw.dma >> 4);
596 spin_unlock_irqrestore(&trans->shrd->lock, flags);
598 /* Alloc and init all Tx queues, including the command queue (#4/#9) */
599 for (txq_id = 0; txq_id < hw_params(trans).max_txq_num; txq_id++) {
600 slots_num = (txq_id == trans->shrd->cmd_queue) ?
601 TFD_CMD_SLOTS : TFD_TX_CMD_SLOTS;
602 ret = iwl_trans_txq_init(trans, &trans_pcie->txq[txq_id],
605 IWL_ERR(trans, "Tx %d queue init failed\n", txq_id);
612 /*Upon error, free only if we allocated something */
614 iwl_trans_pcie_tx_free(trans);
618 static void iwl_set_pwr_vmain(struct iwl_trans *trans)
621 * (for documentation purposes)
622 * to set power to V_AUX, do:
624 if (pci_pme_capable(priv->pci_dev, PCI_D3cold))
625 iwl_set_bits_mask_prph(trans, APMG_PS_CTRL_REG,
626 APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
627 ~APMG_PS_CTRL_MSK_PWR_SRC);
630 iwl_set_bits_mask_prph(trans, APMG_PS_CTRL_REG,
631 APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
632 ~APMG_PS_CTRL_MSK_PWR_SRC);
636 * Start up NIC's basic functionality after it has been reset
637 * (e.g. after platform boot, or shutdown via iwl_apm_stop())
638 * NOTE: This does not load uCode nor start the embedded processor
640 static int iwl_apm_init(struct iwl_trans *trans)
643 IWL_DEBUG_INFO(trans, "Init card's basic functions\n");
646 * Use "set_bit" below rather than "write", to preserve any hardware
647 * bits already set by default after reset.
650 /* Disable L0S exit timer (platform NMI Work/Around) */
651 iwl_set_bit(trans, CSR_GIO_CHICKEN_BITS,
652 CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
655 * Disable L0s without affecting L1;
656 * don't wait for ICH L0s (ICH bug W/A)
658 iwl_set_bit(trans, CSR_GIO_CHICKEN_BITS,
659 CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
661 /* Set FH wait threshold to maximum (HW error during stress W/A) */
662 iwl_set_bit(trans, CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL);
665 * Enable HAP INTA (interrupt from management bus) to
666 * wake device's PCI Express link L1a -> L0s
668 iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG,
669 CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
671 bus_apm_config(bus(trans));
673 /* Configure analog phase-lock-loop before activating to D0A */
674 if (cfg(trans)->base_params->pll_cfg_val)
675 iwl_set_bit(trans, CSR_ANA_PLL_CFG,
676 cfg(trans)->base_params->pll_cfg_val);
679 * Set "initialization complete" bit to move adapter from
680 * D0U* --> D0A* (powered-up active) state.
682 iwl_set_bit(trans, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
685 * Wait for clock stabilization; once stabilized, access to
686 * device-internal resources is supported, e.g. iwl_write_prph()
687 * and accesses to uCode SRAM.
689 ret = iwl_poll_bit(trans, CSR_GP_CNTRL,
690 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
691 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
693 IWL_DEBUG_INFO(trans, "Failed to init the card\n");
698 * Enable DMA clock and wait for it to stabilize.
700 * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
701 * do not disable clocks. This preserves any hardware bits already
702 * set by default in "CLK_CTRL_REG" after reset.
704 iwl_write_prph(trans, APMG_CLK_EN_REG, APMG_CLK_VAL_DMA_CLK_RQT);
707 /* Disable L1-Active */
708 iwl_set_bits_prph(trans, APMG_PCIDEV_STT_REG,
709 APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
711 set_bit(STATUS_DEVICE_ENABLED, &trans->shrd->status);
717 static int iwl_apm_stop_master(struct iwl_trans *trans)
721 /* stop device's busmaster DMA activity */
722 iwl_set_bit(trans, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
724 ret = iwl_poll_bit(trans, CSR_RESET,
725 CSR_RESET_REG_FLAG_MASTER_DISABLED,
726 CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
728 IWL_WARN(trans, "Master Disable Timed Out, 100 usec\n");
730 IWL_DEBUG_INFO(trans, "stop master\n");
735 static void iwl_apm_stop(struct iwl_trans *trans)
737 IWL_DEBUG_INFO(trans, "Stop card, put in low power state\n");
739 clear_bit(STATUS_DEVICE_ENABLED, &trans->shrd->status);
741 /* Stop device's DMA activity */
742 iwl_apm_stop_master(trans);
744 /* Reset the entire device */
745 iwl_set_bit(trans, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
750 * Clear "initialization complete" bit to move adapter from
751 * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
753 iwl_clear_bit(trans, CSR_GP_CNTRL,
754 CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
757 static int iwl_nic_init(struct iwl_trans *trans)
762 spin_lock_irqsave(&trans->shrd->lock, flags);
765 /* Set interrupt coalescing calibration timer to default (512 usecs) */
766 iwl_write8(trans, CSR_INT_COALESCING,
767 IWL_HOST_INT_CALIB_TIMEOUT_DEF);
769 spin_unlock_irqrestore(&trans->shrd->lock, flags);
771 iwl_set_pwr_vmain(trans);
773 iwl_nic_config(priv(trans));
775 #ifndef CONFIG_IWLWIFI_IDI
776 /* Allocate the RX queue, or reset if it is already allocated */
780 /* Allocate or reset and init all Tx and Command queues */
781 if (iwl_tx_init(trans))
784 if (hw_params(trans).shadow_reg_enable) {
785 /* enable shadow regs in HW */
786 iwl_set_bit(trans, CSR_MAC_SHADOW_REG_CTRL,
790 set_bit(STATUS_INIT, &trans->shrd->status);
795 #define HW_READY_TIMEOUT (50)
797 /* Note: returns poll_bit return value, which is >= 0 if success */
798 static int iwl_set_hw_ready(struct iwl_trans *trans)
802 iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG,
803 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY);
805 /* See if we got it */
806 ret = iwl_poll_bit(trans, CSR_HW_IF_CONFIG_REG,
807 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
808 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
811 IWL_DEBUG_INFO(trans, "hardware%s ready\n", ret < 0 ? " not" : "");
815 /* Note: returns standard 0/-ERROR code */
816 static int iwl_prepare_card_hw(struct iwl_trans *trans)
820 IWL_DEBUG_INFO(trans, "iwl_trans_prepare_card_hw enter\n");
822 ret = iwl_set_hw_ready(trans);
823 /* If the card is ready, exit 0 */
827 /* If HW is not ready, prepare the conditions to check again */
828 iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG,
829 CSR_HW_IF_CONFIG_REG_PREPARE);
831 ret = iwl_poll_bit(trans, CSR_HW_IF_CONFIG_REG,
832 ~CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE,
833 CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE, 150000);
838 /* HW should be ready by now, check again. */
839 ret = iwl_set_hw_ready(trans);
845 #define IWL_AC_UNSET -1
847 struct queue_to_fifo_ac {
851 static const struct queue_to_fifo_ac iwlagn_default_queue_to_tx_fifo[] = {
852 { IWL_TX_FIFO_VO, IEEE80211_AC_VO, },
853 { IWL_TX_FIFO_VI, IEEE80211_AC_VI, },
854 { IWL_TX_FIFO_BE, IEEE80211_AC_BE, },
855 { IWL_TX_FIFO_BK, IEEE80211_AC_BK, },
856 { IWLAGN_CMD_FIFO_NUM, IWL_AC_UNSET, },
857 { IWL_TX_FIFO_UNUSED, IWL_AC_UNSET, },
858 { IWL_TX_FIFO_UNUSED, IWL_AC_UNSET, },
859 { IWL_TX_FIFO_UNUSED, IWL_AC_UNSET, },
860 { IWL_TX_FIFO_UNUSED, IWL_AC_UNSET, },
861 { IWL_TX_FIFO_UNUSED, IWL_AC_UNSET, },
862 { IWL_TX_FIFO_UNUSED, IWL_AC_UNSET, },
865 static const struct queue_to_fifo_ac iwlagn_ipan_queue_to_tx_fifo[] = {
866 { IWL_TX_FIFO_VO, IEEE80211_AC_VO, },
867 { IWL_TX_FIFO_VI, IEEE80211_AC_VI, },
868 { IWL_TX_FIFO_BE, IEEE80211_AC_BE, },
869 { IWL_TX_FIFO_BK, IEEE80211_AC_BK, },
870 { IWL_TX_FIFO_BK_IPAN, IEEE80211_AC_BK, },
871 { IWL_TX_FIFO_BE_IPAN, IEEE80211_AC_BE, },
872 { IWL_TX_FIFO_VI_IPAN, IEEE80211_AC_VI, },
873 { IWL_TX_FIFO_VO_IPAN, IEEE80211_AC_VO, },
874 { IWL_TX_FIFO_BE_IPAN, 2, },
875 { IWLAGN_CMD_FIFO_NUM, IWL_AC_UNSET, },
876 { IWL_TX_FIFO_AUX, IWL_AC_UNSET, },
879 static const u8 iwlagn_bss_ac_to_fifo[] = {
885 static const u8 iwlagn_bss_ac_to_queue[] = {
888 static const u8 iwlagn_pan_ac_to_fifo[] = {
894 static const u8 iwlagn_pan_ac_to_queue[] = {
898 static int iwl_trans_pcie_start_device(struct iwl_trans *trans)
901 struct iwl_trans_pcie *trans_pcie =
902 IWL_TRANS_GET_PCIE_TRANS(trans);
904 trans->shrd->ucode_owner = IWL_OWNERSHIP_DRIVER;
905 trans_pcie->ac_to_queue[IWL_RXON_CTX_BSS] = iwlagn_bss_ac_to_queue;
906 trans_pcie->ac_to_queue[IWL_RXON_CTX_PAN] = iwlagn_pan_ac_to_queue;
908 trans_pcie->ac_to_fifo[IWL_RXON_CTX_BSS] = iwlagn_bss_ac_to_fifo;
909 trans_pcie->ac_to_fifo[IWL_RXON_CTX_PAN] = iwlagn_pan_ac_to_fifo;
911 trans_pcie->mcast_queue[IWL_RXON_CTX_BSS] = 0;
912 trans_pcie->mcast_queue[IWL_RXON_CTX_PAN] = IWL_IPAN_MCAST_QUEUE;
914 if ((hw_params(trans).sku & EEPROM_SKU_CAP_AMT_ENABLE) &&
915 iwl_prepare_card_hw(trans)) {
916 IWL_WARN(trans, "Exit HW not ready\n");
920 /* If platform's RF_KILL switch is NOT set to KILL */
921 if (iwl_read32(trans, CSR_GP_CNTRL) &
922 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
923 clear_bit(STATUS_RF_KILL_HW, &trans->shrd->status);
925 set_bit(STATUS_RF_KILL_HW, &trans->shrd->status);
927 if (iwl_is_rfkill(trans->shrd)) {
928 iwl_set_hw_rfkill_state(priv(trans), true);
929 iwl_enable_interrupts(trans);
933 iwl_write32(trans, CSR_INT, 0xFFFFFFFF);
935 ret = iwl_nic_init(trans);
937 IWL_ERR(trans, "Unable to init nic\n");
941 /* make sure rfkill handshake bits are cleared */
942 iwl_write32(trans, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
943 iwl_write32(trans, CSR_UCODE_DRV_GP1_CLR,
944 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
946 /* clear (again), then enable host interrupts */
947 iwl_write32(trans, CSR_INT, 0xFFFFFFFF);
948 iwl_enable_interrupts(trans);
950 /* really make sure rfkill handshake bits are cleared */
951 iwl_write32(trans, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
952 iwl_write32(trans, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
958 * Activate/Deactivate Tx DMA/FIFO channels according tx fifos mask
959 * must be called under priv->shrd->lock and mac access
961 static void iwl_trans_txq_set_sched(struct iwl_trans *trans, u32 mask)
963 iwl_write_prph(trans, SCD_TXFACT, mask);
966 static void iwl_tx_start(struct iwl_trans *trans)
968 const struct queue_to_fifo_ac *queue_to_fifo;
969 struct iwl_trans_pcie *trans_pcie =
970 IWL_TRANS_GET_PCIE_TRANS(trans);
976 spin_lock_irqsave(&trans->shrd->lock, flags);
978 trans_pcie->scd_base_addr =
979 iwl_read_prph(trans, SCD_SRAM_BASE_ADDR);
980 a = trans_pcie->scd_base_addr + SCD_CONTEXT_MEM_LOWER_BOUND;
981 /* reset conext data memory */
982 for (; a < trans_pcie->scd_base_addr + SCD_CONTEXT_MEM_UPPER_BOUND;
984 iwl_write_targ_mem(trans, a, 0);
985 /* reset tx status memory */
986 for (; a < trans_pcie->scd_base_addr + SCD_TX_STTS_MEM_UPPER_BOUND;
988 iwl_write_targ_mem(trans, a, 0);
989 for (; a < trans_pcie->scd_base_addr +
990 SCD_TRANS_TBL_OFFSET_QUEUE(hw_params(trans).max_txq_num);
992 iwl_write_targ_mem(trans, a, 0);
994 iwl_write_prph(trans, SCD_DRAM_BASE_ADDR,
995 trans_pcie->scd_bc_tbls.dma >> 10);
997 /* Enable DMA channel */
998 for (chan = 0; chan < FH_TCSR_CHNL_NUM ; chan++)
999 iwl_write_direct32(trans, FH_TCSR_CHNL_TX_CONFIG_REG(chan),
1000 FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE |
1001 FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE);
1003 /* Update FH chicken bits */
1004 reg_val = iwl_read_direct32(trans, FH_TX_CHICKEN_BITS_REG);
1005 iwl_write_direct32(trans, FH_TX_CHICKEN_BITS_REG,
1006 reg_val | FH_TX_CHICKEN_BITS_SCD_AUTO_RETRY_EN);
1008 iwl_write_prph(trans, SCD_QUEUECHAIN_SEL,
1009 SCD_QUEUECHAIN_SEL_ALL(trans));
1010 iwl_write_prph(trans, SCD_AGGR_SEL, 0);
1012 /* initiate the queues */
1013 for (i = 0; i < hw_params(trans).max_txq_num; i++) {
1014 iwl_write_prph(trans, SCD_QUEUE_RDPTR(i), 0);
1015 iwl_write_direct32(trans, HBUS_TARG_WRPTR, 0 | (i << 8));
1016 iwl_write_targ_mem(trans, trans_pcie->scd_base_addr +
1017 SCD_CONTEXT_QUEUE_OFFSET(i), 0);
1018 iwl_write_targ_mem(trans, trans_pcie->scd_base_addr +
1019 SCD_CONTEXT_QUEUE_OFFSET(i) +
1022 SCD_QUEUE_CTX_REG2_WIN_SIZE_POS) &
1023 SCD_QUEUE_CTX_REG2_WIN_SIZE_MSK) |
1024 ((SCD_FRAME_LIMIT <<
1025 SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) &
1026 SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK));
1029 iwl_write_prph(trans, SCD_INTERRUPT_MASK,
1030 IWL_MASK(0, hw_params(trans).max_txq_num));
1032 /* Activate all Tx DMA/FIFO channels */
1033 iwl_trans_txq_set_sched(trans, IWL_MASK(0, 7));
1035 /* map queues to FIFOs */
1036 if (trans->shrd->valid_contexts != BIT(IWL_RXON_CTX_BSS))
1037 queue_to_fifo = iwlagn_ipan_queue_to_tx_fifo;
1039 queue_to_fifo = iwlagn_default_queue_to_tx_fifo;
1041 iwl_trans_set_wr_ptrs(trans, trans->shrd->cmd_queue, 0);
1043 /* make sure all queue are not stopped */
1044 memset(&trans_pcie->queue_stopped[0], 0,
1045 sizeof(trans_pcie->queue_stopped));
1046 for (i = 0; i < 4; i++)
1047 atomic_set(&trans_pcie->queue_stop_count[i], 0);
1049 /* reset to 0 to enable all the queue first */
1050 trans_pcie->txq_ctx_active_msk = 0;
1052 BUILD_BUG_ON(ARRAY_SIZE(iwlagn_default_queue_to_tx_fifo) <
1053 IWLAGN_FIRST_AMPDU_QUEUE);
1054 BUILD_BUG_ON(ARRAY_SIZE(iwlagn_ipan_queue_to_tx_fifo) <
1055 IWLAGN_FIRST_AMPDU_QUEUE);
1057 for (i = 0; i < IWLAGN_FIRST_AMPDU_QUEUE; i++) {
1058 int fifo = queue_to_fifo[i].fifo;
1059 int ac = queue_to_fifo[i].ac;
1061 iwl_txq_ctx_activate(trans_pcie, i);
1063 if (fifo == IWL_TX_FIFO_UNUSED)
1066 if (ac != IWL_AC_UNSET)
1067 iwl_set_swq_id(&trans_pcie->txq[i], ac, i);
1068 iwl_trans_tx_queue_set_status(trans, &trans_pcie->txq[i],
1072 spin_unlock_irqrestore(&trans->shrd->lock, flags);
1074 /* Enable L1-Active */
1075 iwl_clear_bits_prph(trans, APMG_PCIDEV_STT_REG,
1076 APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
1079 static void iwl_trans_pcie_fw_alive(struct iwl_trans *trans)
1081 iwl_reset_ict(trans);
1082 iwl_tx_start(trans);
1086 * iwlagn_txq_ctx_stop - Stop all Tx DMA channels
1088 static int iwl_trans_tx_stop(struct iwl_trans *trans)
1091 unsigned long flags;
1092 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1094 /* Turn off all Tx DMA fifos */
1095 spin_lock_irqsave(&trans->shrd->lock, flags);
1097 iwl_trans_txq_set_sched(trans, 0);
1099 /* Stop each Tx DMA channel, and wait for it to be idle */
1100 for (ch = 0; ch < FH_TCSR_CHNL_NUM; ch++) {
1101 iwl_write_direct32(trans,
1102 FH_TCSR_CHNL_TX_CONFIG_REG(ch), 0x0);
1103 if (iwl_poll_direct_bit(trans, FH_TSSR_TX_STATUS_REG,
1104 FH_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(ch),
1106 IWL_ERR(trans, "Failing on timeout while stopping"
1107 " DMA channel %d [0x%08x]", ch,
1108 iwl_read_direct32(trans,
1109 FH_TSSR_TX_STATUS_REG));
1111 spin_unlock_irqrestore(&trans->shrd->lock, flags);
1113 if (!trans_pcie->txq) {
1114 IWL_WARN(trans, "Stopping tx queues that aren't allocated...");
1118 /* Unmap DMA from host system and free skb's */
1119 for (txq_id = 0; txq_id < hw_params(trans).max_txq_num; txq_id++)
1120 iwl_tx_queue_unmap(trans, txq_id);
1125 static void iwl_trans_pcie_stop_device(struct iwl_trans *trans)
1127 unsigned long flags;
1128 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1130 /* tell the device to stop sending interrupts */
1131 spin_lock_irqsave(&trans->shrd->lock, flags);
1132 iwl_disable_interrupts(trans);
1133 spin_unlock_irqrestore(&trans->shrd->lock, flags);
1135 /* device going down, Stop using ICT table */
1136 iwl_disable_ict(trans);
1139 * If a HW restart happens during firmware loading,
1140 * then the firmware loading might call this function
1141 * and later it might be called again due to the
1142 * restart. So don't process again if the device is
1145 if (test_bit(STATUS_DEVICE_ENABLED, &trans->shrd->status)) {
1146 iwl_trans_tx_stop(trans);
1147 #ifndef CONFIG_IWLWIFI_IDI
1148 iwl_trans_rx_stop(trans);
1150 /* Power-down device's busmaster DMA clocks */
1151 iwl_write_prph(trans, APMG_CLK_DIS_REG,
1152 APMG_CLK_VAL_DMA_CLK_RQT);
1156 /* Make sure (redundant) we've released our request to stay awake */
1157 iwl_clear_bit(trans, CSR_GP_CNTRL,
1158 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
1160 /* Stop the device, and put it in low power state */
1161 iwl_apm_stop(trans);
1163 /* Upon stop, the APM issues an interrupt if HW RF kill is set.
1164 * Clean again the interrupt here
1166 spin_lock_irqsave(&trans->shrd->lock, flags);
1167 iwl_disable_interrupts(trans);
1168 spin_unlock_irqrestore(&trans->shrd->lock, flags);
1170 /* wait to make sure we flush pending tasklet*/
1171 synchronize_irq(trans->irq);
1172 tasklet_kill(&trans_pcie->irq_tasklet);
1174 /* stop and reset the on-board processor */
1175 iwl_write32(trans, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
1178 static int iwl_trans_pcie_tx(struct iwl_trans *trans, struct sk_buff *skb,
1179 struct iwl_device_cmd *dev_cmd, enum iwl_rxon_context_id ctx,
1182 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1183 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1184 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1185 struct iwl_tx_cmd *tx_cmd = (struct iwl_tx_cmd *) dev_cmd->payload;
1186 struct iwl_cmd_meta *out_meta;
1187 struct iwl_tx_queue *txq;
1188 struct iwl_queue *q;
1190 dma_addr_t phys_addr = 0;
1191 dma_addr_t txcmd_phys;
1192 dma_addr_t scratch_phys;
1193 u16 len, firstlen, secondlen;
1194 u8 wait_write_ptr = 0;
1196 bool is_agg = false;
1197 __le16 fc = hdr->frame_control;
1198 u8 hdr_len = ieee80211_hdrlen(fc);
1199 u16 __maybe_unused wifi_seq;
1202 * Send this frame after DTIM -- there's a special queue
1203 * reserved for this for contexts that support AP mode.
1205 if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) {
1206 txq_id = trans_pcie->mcast_queue[ctx];
1209 * The microcode will clear the more data
1210 * bit in the last frame it transmits.
1212 hdr->frame_control |=
1213 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
1214 } else if (info->flags & IEEE80211_TX_CTL_TX_OFFCHAN)
1215 txq_id = IWL_AUX_QUEUE;
1218 trans_pcie->ac_to_queue[ctx][skb_get_queue_mapping(skb)];
1220 /* aggregation is on for this <sta,tid> */
1221 if (info->flags & IEEE80211_TX_CTL_AMPDU) {
1222 WARN_ON(tid >= IWL_MAX_TID_COUNT);
1223 txq_id = trans_pcie->agg_txq[sta_id][tid];
1227 txq = &trans_pcie->txq[txq_id];
1230 /* In AGG mode, the index in the ring must correspond to the WiFi
1231 * sequence number. This is a HW requirements to help the SCD to parse
1233 * Check here that the packets are in the right place on the ring.
1235 #ifdef CONFIG_IWLWIFI_DEBUG
1236 wifi_seq = SEQ_TO_SN(le16_to_cpu(hdr->seq_ctrl));
1237 WARN_ONCE(is_agg && ((wifi_seq & 0xff) != q->write_ptr),
1238 "Q: %d WiFi Seq %d tfdNum %d",
1239 txq_id, wifi_seq, q->write_ptr);
1242 /* Set up driver data for this TFD */
1243 txq->skbs[q->write_ptr] = skb;
1244 txq->cmd[q->write_ptr] = dev_cmd;
1246 dev_cmd->hdr.cmd = REPLY_TX;
1247 dev_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
1248 INDEX_TO_SEQ(q->write_ptr)));
1250 /* Set up first empty entry in queue's array of Tx/cmd buffers */
1251 out_meta = &txq->meta[q->write_ptr];
1254 * Use the first empty entry in this queue's command buffer array
1255 * to contain the Tx command and MAC header concatenated together
1256 * (payload data will be in another buffer).
1257 * Size of this varies, due to varying MAC header length.
1258 * If end is not dword aligned, we'll have 2 extra bytes at the end
1259 * of the MAC header (device reads on dword boundaries).
1260 * We'll tell device about this padding later.
1262 len = sizeof(struct iwl_tx_cmd) +
1263 sizeof(struct iwl_cmd_header) + hdr_len;
1264 firstlen = (len + 3) & ~3;
1266 /* Tell NIC about any 2-byte padding after MAC header */
1267 if (firstlen != len)
1268 tx_cmd->tx_flags |= TX_CMD_FLG_MH_PAD_MSK;
1270 /* Physical address of this Tx command's header (not MAC header!),
1271 * within command buffer array. */
1272 txcmd_phys = dma_map_single(trans->dev,
1273 &dev_cmd->hdr, firstlen,
1275 if (unlikely(dma_mapping_error(trans->dev, txcmd_phys)))
1277 dma_unmap_addr_set(out_meta, mapping, txcmd_phys);
1278 dma_unmap_len_set(out_meta, len, firstlen);
1280 if (!ieee80211_has_morefrags(fc)) {
1281 txq->need_update = 1;
1284 txq->need_update = 0;
1287 /* Set up TFD's 2nd entry to point directly to remainder of skb,
1288 * if any (802.11 null frames have no payload). */
1289 secondlen = skb->len - hdr_len;
1290 if (secondlen > 0) {
1291 phys_addr = dma_map_single(trans->dev, skb->data + hdr_len,
1292 secondlen, DMA_TO_DEVICE);
1293 if (unlikely(dma_mapping_error(trans->dev, phys_addr))) {
1294 dma_unmap_single(trans->dev,
1295 dma_unmap_addr(out_meta, mapping),
1296 dma_unmap_len(out_meta, len),
1302 /* Attach buffers to TFD */
1303 iwlagn_txq_attach_buf_to_tfd(trans, txq, txcmd_phys, firstlen, 1);
1305 iwlagn_txq_attach_buf_to_tfd(trans, txq, phys_addr,
1308 scratch_phys = txcmd_phys + sizeof(struct iwl_cmd_header) +
1309 offsetof(struct iwl_tx_cmd, scratch);
1311 /* take back ownership of DMA buffer to enable update */
1312 dma_sync_single_for_cpu(trans->dev, txcmd_phys, firstlen,
1314 tx_cmd->dram_lsb_ptr = cpu_to_le32(scratch_phys);
1315 tx_cmd->dram_msb_ptr = iwl_get_dma_hi_addr(scratch_phys);
1317 IWL_DEBUG_TX(trans, "sequence nr = 0X%x\n",
1318 le16_to_cpu(dev_cmd->hdr.sequence));
1319 IWL_DEBUG_TX(trans, "tx_flags = 0X%x\n", le32_to_cpu(tx_cmd->tx_flags));
1320 iwl_print_hex_dump(trans, IWL_DL_TX, (u8 *)tx_cmd, sizeof(*tx_cmd));
1321 iwl_print_hex_dump(trans, IWL_DL_TX, (u8 *)tx_cmd->hdr, hdr_len);
1323 /* Set up entry for this TFD in Tx byte-count array */
1324 iwl_trans_txq_update_byte_cnt_tbl(trans, txq, le16_to_cpu(tx_cmd->len));
1326 dma_sync_single_for_device(trans->dev, txcmd_phys, firstlen,
1329 trace_iwlwifi_dev_tx(priv(trans),
1330 &((struct iwl_tfd *)txq->tfds)[txq->q.write_ptr],
1331 sizeof(struct iwl_tfd),
1332 &dev_cmd->hdr, firstlen,
1333 skb->data + hdr_len, secondlen);
1335 /* Tell device the write index *just past* this latest filled TFD */
1336 q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
1337 iwl_txq_update_write_ptr(trans, txq);
1340 * At this point the frame is "transmitted" successfully
1341 * and we will get a TX status notification eventually,
1342 * regardless of the value of ret. "ret" only indicates
1343 * whether or not we should update the write pointer.
1345 if (iwl_queue_space(q) < q->high_mark) {
1346 if (wait_write_ptr) {
1347 txq->need_update = 1;
1348 iwl_txq_update_write_ptr(trans, txq);
1350 iwl_stop_queue(trans, txq, "Queue is full");
1356 static void iwl_trans_pcie_kick_nic(struct iwl_trans *trans)
1358 /* Remove all resets to allow NIC to operate */
1359 iwl_write32(trans, CSR_RESET, 0);
1362 static int iwl_trans_pcie_start_hw(struct iwl_trans *trans)
1364 struct iwl_trans_pcie *trans_pcie =
1365 IWL_TRANS_GET_PCIE_TRANS(trans);
1368 trans_pcie->inta_mask = CSR_INI_SET_MASK;
1370 if (!trans_pcie->irq_requested) {
1371 tasklet_init(&trans_pcie->irq_tasklet, (void (*)(unsigned long))
1372 iwl_irq_tasklet, (unsigned long)trans);
1374 iwl_alloc_isr_ict(trans);
1376 err = request_irq(trans->irq, iwl_isr_ict, IRQF_SHARED,
1379 IWL_ERR(trans, "Error allocating IRQ %d\n",
1384 INIT_WORK(&trans_pcie->rx_replenish, iwl_bg_rx_replenish);
1385 trans_pcie->irq_requested = true;
1388 err = iwl_prepare_card_hw(trans);
1390 IWL_ERR(trans, "Error while preparing HW: %d", err);
1394 iwl_apm_init(trans);
1399 iwl_free_isr_ict(trans);
1400 tasklet_kill(&trans_pcie->irq_tasklet);
1404 static void iwl_trans_pcie_stop_hw(struct iwl_trans *trans)
1406 iwl_apm_stop(trans);
1408 /* Even if we stop the HW, we still want the RF kill interrupt */
1409 IWL_DEBUG_ISR(trans, "Enabling rfkill interrupt\n");
1410 iwl_write32(trans, CSR_INT_MASK, CSR_INT_BIT_RF_KILL);
1413 static int iwl_trans_pcie_reclaim(struct iwl_trans *trans, int sta_id, int tid,
1414 int txq_id, int ssn, u32 status,
1415 struct sk_buff_head *skbs)
1417 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1418 struct iwl_tx_queue *txq = &trans_pcie->txq[txq_id];
1419 /* n_bd is usually 256 => n_bd - 1 = 0xff */
1420 int tfd_num = ssn & (txq->q.n_bd - 1);
1423 txq->time_stamp = jiffies;
1425 if (unlikely(txq_id >= IWLAGN_FIRST_AMPDU_QUEUE &&
1426 txq_id != trans_pcie->agg_txq[sta_id][tid])) {
1428 * FIXME: this is a uCode bug which need to be addressed,
1429 * log the information and return for now.
1430 * Since it is can possibly happen very often and in order
1431 * not to fill the syslog, don't use IWL_ERR or IWL_WARN
1433 IWL_DEBUG_TX_QUEUES(trans, "Bad queue mapping txq_id %d, "
1434 "agg_txq[sta_id[tid] %d", txq_id,
1435 trans_pcie->agg_txq[sta_id][tid]);
1439 if (txq->q.read_ptr != tfd_num) {
1440 IWL_DEBUG_TX_REPLY(trans, "[Q %d | AC %d] %d -> %d (%d)\n",
1441 txq_id, iwl_get_queue_ac(txq), txq->q.read_ptr,
1443 freed = iwl_tx_queue_reclaim(trans, txq_id, tfd_num, skbs);
1444 if (iwl_queue_space(&txq->q) > txq->q.low_mark &&
1445 (!txq->sched_retry ||
1446 status != TX_STATUS_FAIL_PASSIVE_NO_RX))
1447 iwl_wake_queue(trans, txq, "Packets reclaimed");
1452 static void iwl_trans_pcie_write8(struct iwl_trans *trans, u32 ofs, u8 val)
1454 iowrite8(val, IWL_TRANS_GET_PCIE_TRANS(trans)->hw_base + ofs);
1457 static void iwl_trans_pcie_write32(struct iwl_trans *trans, u32 ofs, u32 val)
1459 iowrite32(val, IWL_TRANS_GET_PCIE_TRANS(trans)->hw_base + ofs);
1462 static u32 iwl_trans_pcie_read32(struct iwl_trans *trans, u32 ofs)
1464 u32 val = ioread32(IWL_TRANS_GET_PCIE_TRANS(trans)->hw_base + ofs);
1468 static void iwl_trans_pcie_free(struct iwl_trans *trans)
1470 struct iwl_trans_pcie *trans_pcie =
1471 IWL_TRANS_GET_PCIE_TRANS(trans);
1473 iwl_calib_free_results(trans);
1474 iwl_trans_pcie_tx_free(trans);
1475 #ifndef CONFIG_IWLWIFI_IDI
1476 iwl_trans_pcie_rx_free(trans);
1478 if (trans_pcie->irq_requested == true) {
1479 free_irq(trans->irq, trans);
1480 iwl_free_isr_ict(trans);
1483 pci_disable_msi(trans_pcie->pci_dev);
1484 pci_iounmap(trans_pcie->pci_dev, trans_pcie->hw_base);
1485 pci_release_regions(trans_pcie->pci_dev);
1486 pci_disable_device(trans_pcie->pci_dev);
1488 trans->shrd->trans = NULL;
1492 #ifdef CONFIG_PM_SLEEP
1493 static int iwl_trans_pcie_suspend(struct iwl_trans *trans)
1496 * This function is called when system goes into suspend state
1497 * mac80211 will call iwlagn_mac_stop() from the mac80211 suspend
1498 * function first but since iwlagn_mac_stop() has no knowledge of
1499 * who the caller is,
1500 * it will not call apm_ops.stop() to stop the DMA operation.
1501 * Calling apm_ops.stop here to make sure we stop the DMA.
1503 * But of course ... if we have configured WoWLAN then we did other
1504 * things already :-)
1506 if (!trans->shrd->wowlan) {
1507 iwl_apm_stop(trans);
1509 iwl_disable_interrupts(trans);
1510 iwl_clear_bit(trans, CSR_GP_CNTRL,
1511 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
1517 static int iwl_trans_pcie_resume(struct iwl_trans *trans)
1519 bool hw_rfkill = false;
1521 iwl_enable_interrupts(trans);
1523 if (!(iwl_read32(trans, CSR_GP_CNTRL) &
1524 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
1528 set_bit(STATUS_RF_KILL_HW, &trans->shrd->status);
1530 clear_bit(STATUS_RF_KILL_HW, &trans->shrd->status);
1532 iwl_set_hw_rfkill_state(priv(trans), hw_rfkill);
1536 #endif /* CONFIG_PM_SLEEP */
1538 static void iwl_trans_pcie_wake_any_queue(struct iwl_trans *trans,
1539 enum iwl_rxon_context_id ctx,
1543 struct iwl_trans_pcie *trans_pcie =
1544 IWL_TRANS_GET_PCIE_TRANS(trans);
1546 for (ac = 0; ac < AC_NUM; ac++) {
1547 txq_id = trans_pcie->ac_to_queue[ctx][ac];
1548 IWL_DEBUG_TX_QUEUES(trans, "Queue Status: Q[%d] %s\n",
1550 (atomic_read(&trans_pcie->queue_stop_count[ac]) > 0)
1551 ? "stopped" : "awake");
1552 iwl_wake_queue(trans, &trans_pcie->txq[txq_id], msg);
1556 static void iwl_trans_pcie_stop_queue(struct iwl_trans *trans, int txq_id,
1559 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1561 iwl_stop_queue(trans, &trans_pcie->txq[txq_id], msg);
1564 #define IWL_FLUSH_WAIT_MS 2000
1566 static int iwl_trans_pcie_wait_tx_queue_empty(struct iwl_trans *trans)
1568 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1569 struct iwl_tx_queue *txq;
1570 struct iwl_queue *q;
1572 unsigned long now = jiffies;
1575 /* waiting for all the tx frames complete might take a while */
1576 for (cnt = 0; cnt < hw_params(trans).max_txq_num; cnt++) {
1577 if (cnt == trans->shrd->cmd_queue)
1579 txq = &trans_pcie->txq[cnt];
1581 while (q->read_ptr != q->write_ptr && !time_after(jiffies,
1582 now + msecs_to_jiffies(IWL_FLUSH_WAIT_MS)))
1585 if (q->read_ptr != q->write_ptr) {
1586 IWL_ERR(trans, "fail to flush all tx fifo queues\n");
1595 * On every watchdog tick we check (latest) time stamp. If it does not
1596 * change during timeout period and queue is not empty we reset firmware.
1598 static int iwl_trans_pcie_check_stuck_queue(struct iwl_trans *trans, int cnt)
1600 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1601 struct iwl_tx_queue *txq = &trans_pcie->txq[cnt];
1602 struct iwl_queue *q = &txq->q;
1603 unsigned long timeout;
1605 if (q->read_ptr == q->write_ptr) {
1606 txq->time_stamp = jiffies;
1610 timeout = txq->time_stamp +
1611 msecs_to_jiffies(hw_params(trans).wd_timeout);
1613 if (time_after(jiffies, timeout)) {
1614 IWL_ERR(trans, "Queue %d stuck for %u ms.\n", q->id,
1615 hw_params(trans).wd_timeout);
1616 IWL_ERR(trans, "Current SW read_ptr %d write_ptr %d\n",
1617 q->read_ptr, q->write_ptr);
1618 IWL_ERR(trans, "Current HW read_ptr %d write_ptr %d\n",
1619 iwl_read_prph(trans, SCD_QUEUE_RDPTR(cnt))
1620 & (TFD_QUEUE_SIZE_MAX - 1),
1621 iwl_read_prph(trans, SCD_QUEUE_WRPTR(cnt)));
1628 static const char *get_fh_string(int cmd)
1631 IWL_CMD(FH_RSCSR_CHNL0_STTS_WPTR_REG);
1632 IWL_CMD(FH_RSCSR_CHNL0_RBDCB_BASE_REG);
1633 IWL_CMD(FH_RSCSR_CHNL0_WPTR);
1634 IWL_CMD(FH_MEM_RCSR_CHNL0_CONFIG_REG);
1635 IWL_CMD(FH_MEM_RSSR_SHARED_CTRL_REG);
1636 IWL_CMD(FH_MEM_RSSR_RX_STATUS_REG);
1637 IWL_CMD(FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV);
1638 IWL_CMD(FH_TSSR_TX_STATUS_REG);
1639 IWL_CMD(FH_TSSR_TX_ERROR_REG);
1645 int iwl_dump_fh(struct iwl_trans *trans, char **buf, bool display)
1648 #ifdef CONFIG_IWLWIFI_DEBUG
1652 static const u32 fh_tbl[] = {
1653 FH_RSCSR_CHNL0_STTS_WPTR_REG,
1654 FH_RSCSR_CHNL0_RBDCB_BASE_REG,
1655 FH_RSCSR_CHNL0_WPTR,
1656 FH_MEM_RCSR_CHNL0_CONFIG_REG,
1657 FH_MEM_RSSR_SHARED_CTRL_REG,
1658 FH_MEM_RSSR_RX_STATUS_REG,
1659 FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV,
1660 FH_TSSR_TX_STATUS_REG,
1661 FH_TSSR_TX_ERROR_REG
1663 #ifdef CONFIG_IWLWIFI_DEBUG
1665 bufsz = ARRAY_SIZE(fh_tbl) * 48 + 40;
1666 *buf = kmalloc(bufsz, GFP_KERNEL);
1669 pos += scnprintf(*buf + pos, bufsz - pos,
1670 "FH register values:\n");
1671 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) {
1672 pos += scnprintf(*buf + pos, bufsz - pos,
1674 get_fh_string(fh_tbl[i]),
1675 iwl_read_direct32(trans, fh_tbl[i]));
1680 IWL_ERR(trans, "FH register values:\n");
1681 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) {
1682 IWL_ERR(trans, " %34s: 0X%08x\n",
1683 get_fh_string(fh_tbl[i]),
1684 iwl_read_direct32(trans, fh_tbl[i]));
1689 static const char *get_csr_string(int cmd)
1692 IWL_CMD(CSR_HW_IF_CONFIG_REG);
1693 IWL_CMD(CSR_INT_COALESCING);
1695 IWL_CMD(CSR_INT_MASK);
1696 IWL_CMD(CSR_FH_INT_STATUS);
1697 IWL_CMD(CSR_GPIO_IN);
1699 IWL_CMD(CSR_GP_CNTRL);
1700 IWL_CMD(CSR_HW_REV);
1701 IWL_CMD(CSR_EEPROM_REG);
1702 IWL_CMD(CSR_EEPROM_GP);
1703 IWL_CMD(CSR_OTP_GP_REG);
1704 IWL_CMD(CSR_GIO_REG);
1705 IWL_CMD(CSR_GP_UCODE_REG);
1706 IWL_CMD(CSR_GP_DRIVER_REG);
1707 IWL_CMD(CSR_UCODE_DRV_GP1);
1708 IWL_CMD(CSR_UCODE_DRV_GP2);
1709 IWL_CMD(CSR_LED_REG);
1710 IWL_CMD(CSR_DRAM_INT_TBL_REG);
1711 IWL_CMD(CSR_GIO_CHICKEN_BITS);
1712 IWL_CMD(CSR_ANA_PLL_CFG);
1713 IWL_CMD(CSR_HW_REV_WA_REG);
1714 IWL_CMD(CSR_DBG_HPET_MEM_REG);
1720 void iwl_dump_csr(struct iwl_trans *trans)
1723 static const u32 csr_tbl[] = {
1724 CSR_HW_IF_CONFIG_REG,
1742 CSR_DRAM_INT_TBL_REG,
1743 CSR_GIO_CHICKEN_BITS,
1746 CSR_DBG_HPET_MEM_REG
1748 IWL_ERR(trans, "CSR values:\n");
1749 IWL_ERR(trans, "(2nd byte of CSR_INT_COALESCING is "
1750 "CSR_INT_PERIODIC_REG)\n");
1751 for (i = 0; i < ARRAY_SIZE(csr_tbl); i++) {
1752 IWL_ERR(trans, " %25s: 0X%08x\n",
1753 get_csr_string(csr_tbl[i]),
1754 iwl_read32(trans, csr_tbl[i]));
1758 #ifdef CONFIG_IWLWIFI_DEBUGFS
1759 /* create and remove of files */
1760 #define DEBUGFS_ADD_FILE(name, parent, mode) do { \
1761 if (!debugfs_create_file(#name, mode, parent, trans, \
1762 &iwl_dbgfs_##name##_ops)) \
1766 /* file operation */
1767 #define DEBUGFS_READ_FUNC(name) \
1768 static ssize_t iwl_dbgfs_##name##_read(struct file *file, \
1769 char __user *user_buf, \
1770 size_t count, loff_t *ppos);
1772 #define DEBUGFS_WRITE_FUNC(name) \
1773 static ssize_t iwl_dbgfs_##name##_write(struct file *file, \
1774 const char __user *user_buf, \
1775 size_t count, loff_t *ppos);
1778 static int iwl_dbgfs_open_file_generic(struct inode *inode, struct file *file)
1780 file->private_data = inode->i_private;
1784 #define DEBUGFS_READ_FILE_OPS(name) \
1785 DEBUGFS_READ_FUNC(name); \
1786 static const struct file_operations iwl_dbgfs_##name##_ops = { \
1787 .read = iwl_dbgfs_##name##_read, \
1788 .open = iwl_dbgfs_open_file_generic, \
1789 .llseek = generic_file_llseek, \
1792 #define DEBUGFS_WRITE_FILE_OPS(name) \
1793 DEBUGFS_WRITE_FUNC(name); \
1794 static const struct file_operations iwl_dbgfs_##name##_ops = { \
1795 .write = iwl_dbgfs_##name##_write, \
1796 .open = iwl_dbgfs_open_file_generic, \
1797 .llseek = generic_file_llseek, \
1800 #define DEBUGFS_READ_WRITE_FILE_OPS(name) \
1801 DEBUGFS_READ_FUNC(name); \
1802 DEBUGFS_WRITE_FUNC(name); \
1803 static const struct file_operations iwl_dbgfs_##name##_ops = { \
1804 .write = iwl_dbgfs_##name##_write, \
1805 .read = iwl_dbgfs_##name##_read, \
1806 .open = iwl_dbgfs_open_file_generic, \
1807 .llseek = generic_file_llseek, \
1810 static ssize_t iwl_dbgfs_tx_queue_read(struct file *file,
1811 char __user *user_buf,
1812 size_t count, loff_t *ppos)
1814 struct iwl_trans *trans = file->private_data;
1815 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1816 struct iwl_tx_queue *txq;
1817 struct iwl_queue *q;
1822 const size_t bufsz = sizeof(char) * 64 * hw_params(trans).max_txq_num;
1824 if (!trans_pcie->txq) {
1825 IWL_ERR(trans, "txq not ready\n");
1828 buf = kzalloc(bufsz, GFP_KERNEL);
1832 for (cnt = 0; cnt < hw_params(trans).max_txq_num; cnt++) {
1833 txq = &trans_pcie->txq[cnt];
1835 pos += scnprintf(buf + pos, bufsz - pos,
1836 "hwq %.2d: read=%u write=%u stop=%d"
1837 " swq_id=%#.2x (ac %d/hwq %d)\n",
1838 cnt, q->read_ptr, q->write_ptr,
1839 !!test_bit(cnt, trans_pcie->queue_stopped),
1840 txq->swq_id, txq->swq_id & 3,
1841 (txq->swq_id >> 2) & 0x1f);
1844 /* for the ACs, display the stop count too */
1845 pos += scnprintf(buf + pos, bufsz - pos,
1846 " stop-count: %d\n",
1847 atomic_read(&trans_pcie->queue_stop_count[cnt]));
1849 ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
1854 static ssize_t iwl_dbgfs_rx_queue_read(struct file *file,
1855 char __user *user_buf,
1856 size_t count, loff_t *ppos) {
1857 struct iwl_trans *trans = file->private_data;
1858 struct iwl_trans_pcie *trans_pcie =
1859 IWL_TRANS_GET_PCIE_TRANS(trans);
1860 struct iwl_rx_queue *rxq = &trans_pcie->rxq;
1863 const size_t bufsz = sizeof(buf);
1865 pos += scnprintf(buf + pos, bufsz - pos, "read: %u\n",
1867 pos += scnprintf(buf + pos, bufsz - pos, "write: %u\n",
1869 pos += scnprintf(buf + pos, bufsz - pos, "free_count: %u\n",
1872 pos += scnprintf(buf + pos, bufsz - pos, "closed_rb_num: %u\n",
1873 le16_to_cpu(rxq->rb_stts->closed_rb_num) & 0x0FFF);
1875 pos += scnprintf(buf + pos, bufsz - pos,
1876 "closed_rb_num: Not Allocated\n");
1878 return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
1881 static ssize_t iwl_dbgfs_log_event_read(struct file *file,
1882 char __user *user_buf,
1883 size_t count, loff_t *ppos)
1885 struct iwl_trans *trans = file->private_data;
1888 ssize_t ret = -ENOMEM;
1890 ret = pos = iwl_dump_nic_event_log(trans, true, &buf, true);
1892 ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
1898 static ssize_t iwl_dbgfs_log_event_write(struct file *file,
1899 const char __user *user_buf,
1900 size_t count, loff_t *ppos)
1902 struct iwl_trans *trans = file->private_data;
1907 memset(buf, 0, sizeof(buf));
1908 buf_size = min(count, sizeof(buf) - 1);
1909 if (copy_from_user(buf, user_buf, buf_size))
1911 if (sscanf(buf, "%d", &event_log_flag) != 1)
1913 if (event_log_flag == 1)
1914 iwl_dump_nic_event_log(trans, true, NULL, false);
1919 static ssize_t iwl_dbgfs_interrupt_read(struct file *file,
1920 char __user *user_buf,
1921 size_t count, loff_t *ppos) {
1923 struct iwl_trans *trans = file->private_data;
1924 struct iwl_trans_pcie *trans_pcie =
1925 IWL_TRANS_GET_PCIE_TRANS(trans);
1926 struct isr_statistics *isr_stats = &trans_pcie->isr_stats;
1930 int bufsz = 24 * 64; /* 24 items * 64 char per item */
1933 buf = kzalloc(bufsz, GFP_KERNEL);
1935 IWL_ERR(trans, "Can not allocate Buffer\n");
1939 pos += scnprintf(buf + pos, bufsz - pos,
1940 "Interrupt Statistics Report:\n");
1942 pos += scnprintf(buf + pos, bufsz - pos, "HW Error:\t\t\t %u\n",
1944 pos += scnprintf(buf + pos, bufsz - pos, "SW Error:\t\t\t %u\n",
1946 if (isr_stats->sw || isr_stats->hw) {
1947 pos += scnprintf(buf + pos, bufsz - pos,
1948 "\tLast Restarting Code: 0x%X\n",
1949 isr_stats->err_code);
1951 #ifdef CONFIG_IWLWIFI_DEBUG
1952 pos += scnprintf(buf + pos, bufsz - pos, "Frame transmitted:\t\t %u\n",
1954 pos += scnprintf(buf + pos, bufsz - pos, "Alive interrupt:\t\t %u\n",
1957 pos += scnprintf(buf + pos, bufsz - pos,
1958 "HW RF KILL switch toggled:\t %u\n", isr_stats->rfkill);
1960 pos += scnprintf(buf + pos, bufsz - pos, "CT KILL:\t\t\t %u\n",
1963 pos += scnprintf(buf + pos, bufsz - pos, "Wakeup Interrupt:\t\t %u\n",
1966 pos += scnprintf(buf + pos, bufsz - pos,
1967 "Rx command responses:\t\t %u\n", isr_stats->rx);
1969 pos += scnprintf(buf + pos, bufsz - pos, "Tx/FH interrupt:\t\t %u\n",
1972 pos += scnprintf(buf + pos, bufsz - pos, "Unexpected INTA:\t\t %u\n",
1973 isr_stats->unhandled);
1975 ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
1980 static ssize_t iwl_dbgfs_interrupt_write(struct file *file,
1981 const char __user *user_buf,
1982 size_t count, loff_t *ppos)
1984 struct iwl_trans *trans = file->private_data;
1985 struct iwl_trans_pcie *trans_pcie =
1986 IWL_TRANS_GET_PCIE_TRANS(trans);
1987 struct isr_statistics *isr_stats = &trans_pcie->isr_stats;
1993 memset(buf, 0, sizeof(buf));
1994 buf_size = min(count, sizeof(buf) - 1);
1995 if (copy_from_user(buf, user_buf, buf_size))
1997 if (sscanf(buf, "%x", &reset_flag) != 1)
1999 if (reset_flag == 0)
2000 memset(isr_stats, 0, sizeof(*isr_stats));
2005 static ssize_t iwl_dbgfs_csr_write(struct file *file,
2006 const char __user *user_buf,
2007 size_t count, loff_t *ppos)
2009 struct iwl_trans *trans = file->private_data;
2014 memset(buf, 0, sizeof(buf));
2015 buf_size = min(count, sizeof(buf) - 1);
2016 if (copy_from_user(buf, user_buf, buf_size))
2018 if (sscanf(buf, "%d", &csr) != 1)
2021 iwl_dump_csr(trans);
2026 static ssize_t iwl_dbgfs_fh_reg_read(struct file *file,
2027 char __user *user_buf,
2028 size_t count, loff_t *ppos)
2030 struct iwl_trans *trans = file->private_data;
2033 ssize_t ret = -EFAULT;
2035 ret = pos = iwl_dump_fh(trans, &buf, true);
2037 ret = simple_read_from_buffer(user_buf,
2038 count, ppos, buf, pos);
2045 DEBUGFS_READ_WRITE_FILE_OPS(log_event);
2046 DEBUGFS_READ_WRITE_FILE_OPS(interrupt);
2047 DEBUGFS_READ_FILE_OPS(fh_reg);
2048 DEBUGFS_READ_FILE_OPS(rx_queue);
2049 DEBUGFS_READ_FILE_OPS(tx_queue);
2050 DEBUGFS_WRITE_FILE_OPS(csr);
2053 * Create the debugfs files and directories
2056 static int iwl_trans_pcie_dbgfs_register(struct iwl_trans *trans,
2059 DEBUGFS_ADD_FILE(rx_queue, dir, S_IRUSR);
2060 DEBUGFS_ADD_FILE(tx_queue, dir, S_IRUSR);
2061 DEBUGFS_ADD_FILE(log_event, dir, S_IWUSR | S_IRUSR);
2062 DEBUGFS_ADD_FILE(interrupt, dir, S_IWUSR | S_IRUSR);
2063 DEBUGFS_ADD_FILE(csr, dir, S_IWUSR);
2064 DEBUGFS_ADD_FILE(fh_reg, dir, S_IRUSR);
2068 static int iwl_trans_pcie_dbgfs_register(struct iwl_trans *trans,
2072 #endif /*CONFIG_IWLWIFI_DEBUGFS */
2074 const struct iwl_trans_ops trans_ops_pcie = {
2075 .start_hw = iwl_trans_pcie_start_hw,
2076 .stop_hw = iwl_trans_pcie_stop_hw,
2077 .fw_alive = iwl_trans_pcie_fw_alive,
2078 .start_device = iwl_trans_pcie_start_device,
2079 .stop_device = iwl_trans_pcie_stop_device,
2081 .wake_any_queue = iwl_trans_pcie_wake_any_queue,
2083 .send_cmd = iwl_trans_pcie_send_cmd,
2085 .tx = iwl_trans_pcie_tx,
2086 .reclaim = iwl_trans_pcie_reclaim,
2088 .tx_agg_disable = iwl_trans_pcie_tx_agg_disable,
2089 .tx_agg_alloc = iwl_trans_pcie_tx_agg_alloc,
2090 .tx_agg_setup = iwl_trans_pcie_tx_agg_setup,
2092 .kick_nic = iwl_trans_pcie_kick_nic,
2094 .free = iwl_trans_pcie_free,
2095 .stop_queue = iwl_trans_pcie_stop_queue,
2097 .dbgfs_register = iwl_trans_pcie_dbgfs_register,
2099 .wait_tx_queue_empty = iwl_trans_pcie_wait_tx_queue_empty,
2100 .check_stuck_queue = iwl_trans_pcie_check_stuck_queue,
2102 #ifdef CONFIG_PM_SLEEP
2103 .suspend = iwl_trans_pcie_suspend,
2104 .resume = iwl_trans_pcie_resume,
2106 .write8 = iwl_trans_pcie_write8,
2107 .write32 = iwl_trans_pcie_write32,
2108 .read32 = iwl_trans_pcie_read32,
2112 #define PCI_CFG_RETRY_TIMEOUT 0x041
2114 struct iwl_trans *iwl_trans_pcie_alloc(struct iwl_shared *shrd,
2115 struct pci_dev *pdev,
2116 const struct pci_device_id *ent)
2118 struct iwl_trans_pcie *trans_pcie;
2119 struct iwl_trans *trans;
2123 trans = kzalloc(sizeof(struct iwl_trans) +
2124 sizeof(struct iwl_trans_pcie), GFP_KERNEL);
2126 if (WARN_ON(!trans))
2129 trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2131 trans->ops = &trans_ops_pcie;
2133 trans_pcie->trans = trans;
2134 spin_lock_init(&trans->hcmd_lock);
2136 /* W/A - seems to solve weird behavior. We need to remove this if we
2137 * don't want to stay in L1 all the time. This wastes a lot of power */
2138 pci_disable_link_state(pdev, PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1 |
2139 PCIE_LINK_STATE_CLKPM);
2141 if (pci_enable_device(pdev)) {
2146 pci_set_master(pdev);
2148 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(36));
2150 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(36));
2152 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
2154 err = pci_set_consistent_dma_mask(pdev,
2156 /* both attempts failed: */
2158 dev_printk(KERN_ERR, &pdev->dev,
2159 "No suitable DMA available.\n");
2160 goto out_pci_disable_device;
2164 err = pci_request_regions(pdev, DRV_NAME);
2166 dev_printk(KERN_ERR, &pdev->dev, "pci_request_regions failed");
2167 goto out_pci_disable_device;
2170 trans_pcie->hw_base = pci_iomap(pdev, 0, 0);
2171 if (!trans_pcie->hw_base) {
2172 dev_printk(KERN_ERR, &pdev->dev, "pci_iomap failed");
2174 goto out_pci_release_regions;
2177 dev_printk(KERN_INFO, &pdev->dev,
2178 "pci_resource_len = 0x%08llx\n",
2179 (unsigned long long) pci_resource_len(pdev, 0));
2180 dev_printk(KERN_INFO, &pdev->dev,
2181 "pci_resource_base = %p\n", trans_pcie->hw_base);
2183 dev_printk(KERN_INFO, &pdev->dev,
2184 "HW Revision ID = 0x%X\n", pdev->revision);
2186 /* We disable the RETRY_TIMEOUT register (0x41) to keep
2187 * PCI Tx retries from interfering with C3 CPU state */
2188 pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
2190 err = pci_enable_msi(pdev);
2192 dev_printk(KERN_ERR, &pdev->dev,
2193 "pci_enable_msi failed(0X%x)", err);
2195 trans->dev = &pdev->dev;
2196 trans->irq = pdev->irq;
2197 trans_pcie->pci_dev = pdev;
2199 /* TODO: Move this away, not needed if not MSI */
2200 /* enable rfkill interrupt: hw bug w/a */
2201 pci_read_config_word(pdev, PCI_COMMAND, &pci_cmd);
2202 if (pci_cmd & PCI_COMMAND_INTX_DISABLE) {
2203 pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
2204 pci_write_config_word(pdev, PCI_COMMAND, pci_cmd);
2209 out_pci_release_regions:
2210 pci_release_regions(pdev);
2211 out_pci_disable_device:
2212 pci_disable_device(pdev);