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
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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/sched.h>
68 #include <linux/bitops.h>
69 #include <linux/gfp.h>
71 #include "iwl-trans.h"
72 #include "iwl-trans-pcie-int.h"
75 #include "iwl-shared.h"
76 #include "iwl-eeprom.h"
77 #include "iwl-agn-hw.h"
80 static int iwl_trans_rx_alloc(struct iwl_trans *trans)
82 struct iwl_trans_pcie *trans_pcie =
83 IWL_TRANS_GET_PCIE_TRANS(trans);
84 struct iwl_rx_queue *rxq = &trans_pcie->rxq;
85 struct device *dev = trans->dev;
87 memset(&trans_pcie->rxq, 0, sizeof(trans_pcie->rxq));
89 spin_lock_init(&rxq->lock);
91 if (WARN_ON(rxq->bd || rxq->rb_stts))
94 /* Allocate the circular buffer of Read Buffer Descriptors (RBDs) */
95 rxq->bd = dma_zalloc_coherent(dev, sizeof(__le32) * RX_QUEUE_SIZE,
96 &rxq->bd_dma, GFP_KERNEL);
100 /*Allocate the driver's pointer to receive buffer status */
101 rxq->rb_stts = dma_zalloc_coherent(dev, sizeof(*rxq->rb_stts),
102 &rxq->rb_stts_dma, GFP_KERNEL);
109 dma_free_coherent(dev, sizeof(__le32) * RX_QUEUE_SIZE,
110 rxq->bd, rxq->bd_dma);
111 memset(&rxq->bd_dma, 0, sizeof(rxq->bd_dma));
117 static void iwl_trans_rxq_free_rx_bufs(struct iwl_trans *trans)
119 struct iwl_trans_pcie *trans_pcie =
120 IWL_TRANS_GET_PCIE_TRANS(trans);
121 struct iwl_rx_queue *rxq = &trans_pcie->rxq;
124 /* Fill the rx_used queue with _all_ of the Rx buffers */
125 for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
126 /* In the reset function, these buffers may have been allocated
127 * to an SKB, so we need to unmap and free potential storage */
128 if (rxq->pool[i].page != NULL) {
129 dma_unmap_page(trans->dev, rxq->pool[i].page_dma,
130 PAGE_SIZE << hw_params(trans).rx_page_order,
132 __free_pages(rxq->pool[i].page,
133 hw_params(trans).rx_page_order);
134 rxq->pool[i].page = NULL;
136 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
140 static void iwl_trans_rx_hw_init(struct iwl_trans *trans,
141 struct iwl_rx_queue *rxq)
144 const u32 rfdnlog = RX_QUEUE_SIZE_LOG; /* 256 RBDs */
145 u32 rb_timeout = RX_RB_TIMEOUT; /* FIXME: RX_RB_TIMEOUT for all devices? */
147 if (iwlagn_mod_params.amsdu_size_8K)
148 rb_size = FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_8K;
150 rb_size = FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_4K;
153 iwl_write_direct32(trans, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0);
155 /* Reset driver's Rx queue write index */
156 iwl_write_direct32(trans, FH_RSCSR_CHNL0_RBDCB_WPTR_REG, 0);
158 /* Tell device where to find RBD circular buffer in DRAM */
159 iwl_write_direct32(trans, FH_RSCSR_CHNL0_RBDCB_BASE_REG,
160 (u32)(rxq->bd_dma >> 8));
162 /* Tell device where in DRAM to update its Rx status */
163 iwl_write_direct32(trans, FH_RSCSR_CHNL0_STTS_WPTR_REG,
164 rxq->rb_stts_dma >> 4);
167 * FH_RCSR_CHNL0_RX_IGNORE_RXF_EMPTY is set because of HW bug in
168 * the credit mechanism in 5000 HW RX FIFO
169 * Direct rx interrupts to hosts
170 * Rx buffer size 4 or 8k
174 iwl_write_direct32(trans, FH_MEM_RCSR_CHNL0_CONFIG_REG,
175 FH_RCSR_RX_CONFIG_CHNL_EN_ENABLE_VAL |
176 FH_RCSR_CHNL0_RX_IGNORE_RXF_EMPTY |
177 FH_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_INT_HOST_VAL |
178 FH_RCSR_CHNL0_RX_CONFIG_SINGLE_FRAME_MSK |
180 (rb_timeout << FH_RCSR_RX_CONFIG_REG_IRQ_RBTH_POS)|
181 (rfdnlog << FH_RCSR_RX_CONFIG_RBDCB_SIZE_POS));
183 /* Set interrupt coalescing timer to default (2048 usecs) */
184 iwl_write8(trans, CSR_INT_COALESCING, IWL_HOST_INT_TIMEOUT_DEF);
187 static int iwl_rx_init(struct iwl_trans *trans)
189 struct iwl_trans_pcie *trans_pcie =
190 IWL_TRANS_GET_PCIE_TRANS(trans);
191 struct iwl_rx_queue *rxq = &trans_pcie->rxq;
197 err = iwl_trans_rx_alloc(trans);
202 spin_lock_irqsave(&rxq->lock, flags);
203 INIT_LIST_HEAD(&rxq->rx_free);
204 INIT_LIST_HEAD(&rxq->rx_used);
206 iwl_trans_rxq_free_rx_bufs(trans);
208 for (i = 0; i < RX_QUEUE_SIZE; i++)
209 rxq->queue[i] = NULL;
211 /* Set us so that we have processed and used all buffers, but have
212 * not restocked the Rx queue with fresh buffers */
213 rxq->read = rxq->write = 0;
214 rxq->write_actual = 0;
216 spin_unlock_irqrestore(&rxq->lock, flags);
218 iwlagn_rx_replenish(trans);
220 iwl_trans_rx_hw_init(trans, rxq);
222 spin_lock_irqsave(&trans->shrd->lock, flags);
223 rxq->need_update = 1;
224 iwl_rx_queue_update_write_ptr(trans, rxq);
225 spin_unlock_irqrestore(&trans->shrd->lock, flags);
230 static void iwl_trans_pcie_rx_free(struct iwl_trans *trans)
232 struct iwl_trans_pcie *trans_pcie =
233 IWL_TRANS_GET_PCIE_TRANS(trans);
234 struct iwl_rx_queue *rxq = &trans_pcie->rxq;
238 /*if rxq->bd is NULL, it means that nothing has been allocated,
241 IWL_DEBUG_INFO(trans, "Free NULL rx context\n");
245 spin_lock_irqsave(&rxq->lock, flags);
246 iwl_trans_rxq_free_rx_bufs(trans);
247 spin_unlock_irqrestore(&rxq->lock, flags);
249 dma_free_coherent(trans->dev, sizeof(__le32) * RX_QUEUE_SIZE,
250 rxq->bd, rxq->bd_dma);
251 memset(&rxq->bd_dma, 0, sizeof(rxq->bd_dma));
255 dma_free_coherent(trans->dev,
256 sizeof(struct iwl_rb_status),
257 rxq->rb_stts, rxq->rb_stts_dma);
259 IWL_DEBUG_INFO(trans, "Free rxq->rb_stts which is NULL\n");
260 memset(&rxq->rb_stts_dma, 0, sizeof(rxq->rb_stts_dma));
264 static int iwl_trans_rx_stop(struct iwl_trans *trans)
268 iwl_write_direct32(trans, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0);
269 return iwl_poll_direct_bit(trans, FH_MEM_RSSR_RX_STATUS_REG,
270 FH_RSSR_CHNL0_RX_STATUS_CHNL_IDLE, 1000);
273 static inline int iwlagn_alloc_dma_ptr(struct iwl_trans *trans,
274 struct iwl_dma_ptr *ptr, size_t size)
276 if (WARN_ON(ptr->addr))
279 ptr->addr = dma_alloc_coherent(trans->dev, size,
280 &ptr->dma, GFP_KERNEL);
287 static inline void iwlagn_free_dma_ptr(struct iwl_trans *trans,
288 struct iwl_dma_ptr *ptr)
290 if (unlikely(!ptr->addr))
293 dma_free_coherent(trans->dev, ptr->size, ptr->addr, ptr->dma);
294 memset(ptr, 0, sizeof(*ptr));
297 static int iwl_trans_txq_alloc(struct iwl_trans *trans,
298 struct iwl_tx_queue *txq, int slots_num,
301 size_t tfd_sz = sizeof(struct iwl_tfd) * TFD_QUEUE_SIZE_MAX;
304 if (WARN_ON(txq->meta || txq->cmd || txq->skbs || txq->tfds))
307 txq->q.n_window = slots_num;
309 txq->meta = kcalloc(slots_num, sizeof(txq->meta[0]), GFP_KERNEL);
310 txq->cmd = kcalloc(slots_num, sizeof(txq->cmd[0]), GFP_KERNEL);
312 if (!txq->meta || !txq->cmd)
315 if (txq_id == trans->shrd->cmd_queue)
316 for (i = 0; i < slots_num; i++) {
317 txq->cmd[i] = kmalloc(sizeof(struct iwl_device_cmd),
323 /* Alloc driver data array and TFD circular buffer */
324 /* Driver private data, only for Tx (not command) queues,
325 * not shared with device. */
326 if (txq_id != trans->shrd->cmd_queue) {
327 txq->skbs = kcalloc(TFD_QUEUE_SIZE_MAX, sizeof(txq->skbs[0]),
330 IWL_ERR(trans, "kmalloc for auxiliary BD "
331 "structures failed\n");
338 /* Circular buffer of transmit frame descriptors (TFDs),
339 * shared with device */
340 txq->tfds = dma_alloc_coherent(trans->dev, tfd_sz,
341 &txq->q.dma_addr, GFP_KERNEL);
343 IWL_ERR(trans, "dma_alloc_coherent(%zd) failed\n", tfd_sz);
352 /* since txq->cmd has been zeroed,
353 * all non allocated cmd[i] will be NULL */
354 if (txq->cmd && txq_id == trans->shrd->cmd_queue)
355 for (i = 0; i < slots_num; i++)
366 static int iwl_trans_txq_init(struct iwl_trans *trans, struct iwl_tx_queue *txq,
367 int slots_num, u32 txq_id)
371 txq->need_update = 0;
372 memset(txq->meta, 0, sizeof(txq->meta[0]) * slots_num);
375 * For the default queues 0-3, set up the swq_id
376 * already -- all others need to get one later
377 * (if they need one at all).
380 iwl_set_swq_id(txq, txq_id, txq_id);
382 /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
383 * iwl_queue_inc_wrap and iwl_queue_dec_wrap are broken. */
384 BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
386 /* Initialize queue's high/low-water marks, and head/tail indexes */
387 ret = iwl_queue_init(&txq->q, TFD_QUEUE_SIZE_MAX, slots_num,
393 * Tell nic where to find circular buffer of Tx Frame Descriptors for
394 * given Tx queue, and enable the DMA channel used for that queue.
395 * Circular buffer (TFD queue in DRAM) physical base address */
396 iwl_write_direct32(trans, FH_MEM_CBBC_QUEUE(txq_id),
397 txq->q.dma_addr >> 8);
403 * iwl_tx_queue_unmap - Unmap any remaining DMA mappings and free skb's
405 static void iwl_tx_queue_unmap(struct iwl_trans *trans, int txq_id)
407 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
408 struct iwl_tx_queue *txq = &trans_pcie->txq[txq_id];
409 struct iwl_queue *q = &txq->q;
410 enum dma_data_direction dma_dir;
417 /* In the command queue, all the TBs are mapped as BIDI
418 * so unmap them as such.
420 if (txq_id == trans->shrd->cmd_queue) {
421 dma_dir = DMA_BIDIRECTIONAL;
422 lock = &trans->hcmd_lock;
424 dma_dir = DMA_TO_DEVICE;
425 lock = &trans->shrd->sta_lock;
428 spin_lock_irqsave(lock, flags);
429 while (q->write_ptr != q->read_ptr) {
430 /* The read_ptr needs to bound by q->n_window */
431 iwlagn_txq_free_tfd(trans, txq, get_cmd_index(q, q->read_ptr),
433 q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd);
435 spin_unlock_irqrestore(lock, flags);
439 * iwl_tx_queue_free - Deallocate DMA queue.
440 * @txq: Transmit queue to deallocate.
442 * Empty queue by removing and destroying all BD's.
444 * 0-fill, but do not free "txq" descriptor structure.
446 static void iwl_tx_queue_free(struct iwl_trans *trans, int txq_id)
448 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
449 struct iwl_tx_queue *txq = &trans_pcie->txq[txq_id];
450 struct device *dev = trans->dev;
455 iwl_tx_queue_unmap(trans, txq_id);
457 /* De-alloc array of command/tx buffers */
459 if (txq_id == trans->shrd->cmd_queue)
460 for (i = 0; i < txq->q.n_window; i++)
463 /* De-alloc circular buffer of TFDs */
465 dma_free_coherent(dev, sizeof(struct iwl_tfd) *
466 txq->q.n_bd, txq->tfds, txq->q.dma_addr);
467 memset(&txq->q.dma_addr, 0, sizeof(txq->q.dma_addr));
470 /* De-alloc array of per-TFD driver data */
474 /* deallocate arrays */
480 /* 0-fill queue descriptor structure */
481 memset(txq, 0, sizeof(*txq));
485 * iwl_trans_tx_free - Free TXQ Context
487 * Destroy all TX DMA queues and structures
489 static void iwl_trans_pcie_tx_free(struct iwl_trans *trans)
492 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
495 if (trans_pcie->txq) {
497 txq_id < hw_params(trans).max_txq_num; txq_id++)
498 iwl_tx_queue_free(trans, txq_id);
501 kfree(trans_pcie->txq);
502 trans_pcie->txq = NULL;
504 iwlagn_free_dma_ptr(trans, &trans_pcie->kw);
506 iwlagn_free_dma_ptr(trans, &trans_pcie->scd_bc_tbls);
510 * iwl_trans_tx_alloc - allocate TX context
511 * Allocate all Tx DMA structures and initialize them
516 static int iwl_trans_tx_alloc(struct iwl_trans *trans)
519 int txq_id, slots_num;
520 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
522 u16 scd_bc_tbls_size = hw_params(trans).max_txq_num *
523 sizeof(struct iwlagn_scd_bc_tbl);
525 /*It is not allowed to alloc twice, so warn when this happens.
526 * We cannot rely on the previous allocation, so free and fail */
527 if (WARN_ON(trans_pcie->txq)) {
532 ret = iwlagn_alloc_dma_ptr(trans, &trans_pcie->scd_bc_tbls,
535 IWL_ERR(trans, "Scheduler BC Table allocation failed\n");
539 /* Alloc keep-warm buffer */
540 ret = iwlagn_alloc_dma_ptr(trans, &trans_pcie->kw, IWL_KW_SIZE);
542 IWL_ERR(trans, "Keep Warm allocation failed\n");
546 trans_pcie->txq = kcalloc(hw_params(trans).max_txq_num,
547 sizeof(struct iwl_tx_queue), GFP_KERNEL);
548 if (!trans_pcie->txq) {
549 IWL_ERR(trans, "Not enough memory for txq\n");
554 /* Alloc and init all Tx queues, including the command queue (#4/#9) */
555 for (txq_id = 0; txq_id < hw_params(trans).max_txq_num; txq_id++) {
556 slots_num = (txq_id == trans->shrd->cmd_queue) ?
557 TFD_CMD_SLOTS : TFD_TX_CMD_SLOTS;
558 ret = iwl_trans_txq_alloc(trans, &trans_pcie->txq[txq_id],
561 IWL_ERR(trans, "Tx %d queue alloc failed\n", txq_id);
569 iwl_trans_pcie_tx_free(trans);
573 static int iwl_tx_init(struct iwl_trans *trans)
576 int txq_id, slots_num;
579 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
581 if (!trans_pcie->txq) {
582 ret = iwl_trans_tx_alloc(trans);
588 spin_lock_irqsave(&trans->shrd->lock, flags);
590 /* Turn off all Tx DMA fifos */
591 iwl_write_prph(trans, SCD_TXFACT, 0);
593 /* Tell NIC where to find the "keep warm" buffer */
594 iwl_write_direct32(trans, FH_KW_MEM_ADDR_REG,
595 trans_pcie->kw.dma >> 4);
597 spin_unlock_irqrestore(&trans->shrd->lock, flags);
599 /* Alloc and init all Tx queues, including the command queue (#4/#9) */
600 for (txq_id = 0; txq_id < hw_params(trans).max_txq_num; txq_id++) {
601 slots_num = (txq_id == trans->shrd->cmd_queue) ?
602 TFD_CMD_SLOTS : TFD_TX_CMD_SLOTS;
603 ret = iwl_trans_txq_init(trans, &trans_pcie->txq[txq_id],
606 IWL_ERR(trans, "Tx %d queue init failed\n", txq_id);
613 /*Upon error, free only if we allocated something */
615 iwl_trans_pcie_tx_free(trans);
619 static void iwl_set_pwr_vmain(struct iwl_trans *trans)
622 * (for documentation purposes)
623 * to set power to V_AUX, do:
625 if (pci_pme_capable(priv->pci_dev, PCI_D3cold))
626 iwl_set_bits_mask_prph(trans, APMG_PS_CTRL_REG,
627 APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
628 ~APMG_PS_CTRL_MSK_PWR_SRC);
631 iwl_set_bits_mask_prph(trans, APMG_PS_CTRL_REG,
632 APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
633 ~APMG_PS_CTRL_MSK_PWR_SRC);
637 #define PCI_CFG_RETRY_TIMEOUT 0x041
638 #define PCI_CFG_LINK_CTRL_VAL_L0S_EN 0x01
639 #define PCI_CFG_LINK_CTRL_VAL_L1_EN 0x02
641 static u16 iwl_pciexp_link_ctrl(struct iwl_trans *trans)
645 struct iwl_trans_pcie *trans_pcie =
646 IWL_TRANS_GET_PCIE_TRANS(trans);
648 struct pci_dev *pci_dev = trans_pcie->pci_dev;
650 pos = pci_pcie_cap(pci_dev);
651 pci_read_config_word(pci_dev, pos + PCI_EXP_LNKCTL, &pci_lnk_ctl);
655 static void iwl_apm_config(struct iwl_trans *trans)
658 * HW bug W/A for instability in PCIe bus L0S->L1 transition.
659 * Check if BIOS (or OS) enabled L1-ASPM on this device.
660 * If so (likely), disable L0S, so device moves directly L0->L1;
661 * costs negligible amount of power savings.
662 * If not (unlikely), enable L0S, so there is at least some
663 * power savings, even without L1.
665 u16 lctl = iwl_pciexp_link_ctrl(trans);
667 if ((lctl & PCI_CFG_LINK_CTRL_VAL_L1_EN) ==
668 PCI_CFG_LINK_CTRL_VAL_L1_EN) {
669 /* L1-ASPM enabled; disable(!) L0S */
670 iwl_set_bit(trans, CSR_GIO_REG, CSR_GIO_REG_VAL_L0S_ENABLED);
671 dev_printk(KERN_INFO, trans->dev,
672 "L1 Enabled; Disabling L0S\n");
674 /* L1-ASPM disabled; enable(!) L0S */
675 iwl_clear_bit(trans, CSR_GIO_REG, CSR_GIO_REG_VAL_L0S_ENABLED);
676 dev_printk(KERN_INFO, trans->dev,
677 "L1 Disabled; Enabling L0S\n");
679 trans->pm_support = !(lctl & PCI_CFG_LINK_CTRL_VAL_L0S_EN);
683 * Start up NIC's basic functionality after it has been reset
684 * (e.g. after platform boot, or shutdown via iwl_apm_stop())
685 * NOTE: This does not load uCode nor start the embedded processor
687 static int iwl_apm_init(struct iwl_trans *trans)
690 IWL_DEBUG_INFO(trans, "Init card's basic functions\n");
693 * Use "set_bit" below rather than "write", to preserve any hardware
694 * bits already set by default after reset.
697 /* Disable L0S exit timer (platform NMI Work/Around) */
698 iwl_set_bit(trans, CSR_GIO_CHICKEN_BITS,
699 CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
702 * Disable L0s without affecting L1;
703 * don't wait for ICH L0s (ICH bug W/A)
705 iwl_set_bit(trans, CSR_GIO_CHICKEN_BITS,
706 CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
708 /* Set FH wait threshold to maximum (HW error during stress W/A) */
709 iwl_set_bit(trans, CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL);
712 * Enable HAP INTA (interrupt from management bus) to
713 * wake device's PCI Express link L1a -> L0s
715 iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG,
716 CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
718 iwl_apm_config(trans);
720 /* Configure analog phase-lock-loop before activating to D0A */
721 if (cfg(trans)->base_params->pll_cfg_val)
722 iwl_set_bit(trans, CSR_ANA_PLL_CFG,
723 cfg(trans)->base_params->pll_cfg_val);
726 * Set "initialization complete" bit to move adapter from
727 * D0U* --> D0A* (powered-up active) state.
729 iwl_set_bit(trans, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
732 * Wait for clock stabilization; once stabilized, access to
733 * device-internal resources is supported, e.g. iwl_write_prph()
734 * and accesses to uCode SRAM.
736 ret = iwl_poll_bit(trans, CSR_GP_CNTRL,
737 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
738 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
740 IWL_DEBUG_INFO(trans, "Failed to init the card\n");
745 * Enable DMA clock and wait for it to stabilize.
747 * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
748 * do not disable clocks. This preserves any hardware bits already
749 * set by default in "CLK_CTRL_REG" after reset.
751 iwl_write_prph(trans, APMG_CLK_EN_REG, APMG_CLK_VAL_DMA_CLK_RQT);
754 /* Disable L1-Active */
755 iwl_set_bits_prph(trans, APMG_PCIDEV_STT_REG,
756 APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
758 set_bit(STATUS_DEVICE_ENABLED, &trans->shrd->status);
764 static int iwl_apm_stop_master(struct iwl_trans *trans)
768 /* stop device's busmaster DMA activity */
769 iwl_set_bit(trans, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
771 ret = iwl_poll_bit(trans, CSR_RESET,
772 CSR_RESET_REG_FLAG_MASTER_DISABLED,
773 CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
775 IWL_WARN(trans, "Master Disable Timed Out, 100 usec\n");
777 IWL_DEBUG_INFO(trans, "stop master\n");
782 static void iwl_apm_stop(struct iwl_trans *trans)
784 IWL_DEBUG_INFO(trans, "Stop card, put in low power state\n");
786 clear_bit(STATUS_DEVICE_ENABLED, &trans->shrd->status);
788 /* Stop device's DMA activity */
789 iwl_apm_stop_master(trans);
791 /* Reset the entire device */
792 iwl_set_bit(trans, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
797 * Clear "initialization complete" bit to move adapter from
798 * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
800 iwl_clear_bit(trans, CSR_GP_CNTRL,
801 CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
804 static int iwl_nic_init(struct iwl_trans *trans)
809 spin_lock_irqsave(&trans->shrd->lock, flags);
812 /* Set interrupt coalescing calibration timer to default (512 usecs) */
813 iwl_write8(trans, CSR_INT_COALESCING,
814 IWL_HOST_INT_CALIB_TIMEOUT_DEF);
816 spin_unlock_irqrestore(&trans->shrd->lock, flags);
818 iwl_set_pwr_vmain(trans);
820 iwl_nic_config(priv(trans));
822 #ifndef CONFIG_IWLWIFI_IDI
823 /* Allocate the RX queue, or reset if it is already allocated */
827 /* Allocate or reset and init all Tx and Command queues */
828 if (iwl_tx_init(trans))
831 if (hw_params(trans).shadow_reg_enable) {
832 /* enable shadow regs in HW */
833 iwl_set_bit(trans, CSR_MAC_SHADOW_REG_CTRL,
837 set_bit(STATUS_INIT, &trans->shrd->status);
842 #define HW_READY_TIMEOUT (50)
844 /* Note: returns poll_bit return value, which is >= 0 if success */
845 static int iwl_set_hw_ready(struct iwl_trans *trans)
849 iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG,
850 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY);
852 /* See if we got it */
853 ret = iwl_poll_bit(trans, CSR_HW_IF_CONFIG_REG,
854 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
855 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
858 IWL_DEBUG_INFO(trans, "hardware%s ready\n", ret < 0 ? " not" : "");
862 /* Note: returns standard 0/-ERROR code */
863 static int iwl_prepare_card_hw(struct iwl_trans *trans)
867 IWL_DEBUG_INFO(trans, "iwl_trans_prepare_card_hw enter\n");
869 ret = iwl_set_hw_ready(trans);
870 /* If the card is ready, exit 0 */
874 /* If HW is not ready, prepare the conditions to check again */
875 iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG,
876 CSR_HW_IF_CONFIG_REG_PREPARE);
878 ret = iwl_poll_bit(trans, CSR_HW_IF_CONFIG_REG,
879 ~CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE,
880 CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE, 150000);
885 /* HW should be ready by now, check again. */
886 ret = iwl_set_hw_ready(trans);
892 #define IWL_AC_UNSET -1
894 struct queue_to_fifo_ac {
898 static const struct queue_to_fifo_ac iwlagn_default_queue_to_tx_fifo[] = {
899 { IWL_TX_FIFO_VO, IEEE80211_AC_VO, },
900 { IWL_TX_FIFO_VI, IEEE80211_AC_VI, },
901 { IWL_TX_FIFO_BE, IEEE80211_AC_BE, },
902 { IWL_TX_FIFO_BK, IEEE80211_AC_BK, },
903 { IWLAGN_CMD_FIFO_NUM, IWL_AC_UNSET, },
904 { IWL_TX_FIFO_UNUSED, IWL_AC_UNSET, },
905 { IWL_TX_FIFO_UNUSED, IWL_AC_UNSET, },
906 { IWL_TX_FIFO_UNUSED, IWL_AC_UNSET, },
907 { IWL_TX_FIFO_UNUSED, IWL_AC_UNSET, },
908 { IWL_TX_FIFO_UNUSED, IWL_AC_UNSET, },
909 { IWL_TX_FIFO_UNUSED, IWL_AC_UNSET, },
912 static const struct queue_to_fifo_ac iwlagn_ipan_queue_to_tx_fifo[] = {
913 { IWL_TX_FIFO_VO, IEEE80211_AC_VO, },
914 { IWL_TX_FIFO_VI, IEEE80211_AC_VI, },
915 { IWL_TX_FIFO_BE, IEEE80211_AC_BE, },
916 { IWL_TX_FIFO_BK, IEEE80211_AC_BK, },
917 { IWL_TX_FIFO_BK_IPAN, IEEE80211_AC_BK, },
918 { IWL_TX_FIFO_BE_IPAN, IEEE80211_AC_BE, },
919 { IWL_TX_FIFO_VI_IPAN, IEEE80211_AC_VI, },
920 { IWL_TX_FIFO_VO_IPAN, IEEE80211_AC_VO, },
921 { IWL_TX_FIFO_BE_IPAN, 2, },
922 { IWLAGN_CMD_FIFO_NUM, IWL_AC_UNSET, },
923 { IWL_TX_FIFO_AUX, IWL_AC_UNSET, },
926 static const u8 iwlagn_bss_ac_to_fifo[] = {
932 static const u8 iwlagn_bss_ac_to_queue[] = {
935 static const u8 iwlagn_pan_ac_to_fifo[] = {
941 static const u8 iwlagn_pan_ac_to_queue[] = {
948 static int iwl_load_section(struct iwl_trans *trans, const char *name,
949 struct fw_desc *image, u32 dst_addr)
951 dma_addr_t phy_addr = image->p_addr;
952 u32 byte_cnt = image->len;
955 trans->ucode_write_complete = 0;
957 iwl_write_direct32(trans,
958 FH_TCSR_CHNL_TX_CONFIG_REG(FH_SRVC_CHNL),
959 FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_PAUSE);
961 iwl_write_direct32(trans,
962 FH_SRVC_CHNL_SRAM_ADDR_REG(FH_SRVC_CHNL), dst_addr);
964 iwl_write_direct32(trans,
965 FH_TFDIB_CTRL0_REG(FH_SRVC_CHNL),
966 phy_addr & FH_MEM_TFDIB_DRAM_ADDR_LSB_MSK);
968 iwl_write_direct32(trans,
969 FH_TFDIB_CTRL1_REG(FH_SRVC_CHNL),
970 (iwl_get_dma_hi_addr(phy_addr)
971 << FH_MEM_TFDIB_REG1_ADDR_BITSHIFT) | byte_cnt);
973 iwl_write_direct32(trans,
974 FH_TCSR_CHNL_TX_BUF_STS_REG(FH_SRVC_CHNL),
975 1 << FH_TCSR_CHNL_TX_BUF_STS_REG_POS_TB_NUM |
976 1 << FH_TCSR_CHNL_TX_BUF_STS_REG_POS_TB_IDX |
977 FH_TCSR_CHNL_TX_BUF_STS_REG_VAL_TFDB_VALID);
979 iwl_write_direct32(trans,
980 FH_TCSR_CHNL_TX_CONFIG_REG(FH_SRVC_CHNL),
981 FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE |
982 FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_DISABLE |
983 FH_TCSR_TX_CONFIG_REG_VAL_CIRQ_HOST_ENDTFD);
985 IWL_DEBUG_FW(trans, "%s uCode section being loaded...\n", name);
986 ret = wait_event_timeout(trans->shrd->wait_command_queue,
987 trans->ucode_write_complete, 5 * HZ);
989 IWL_ERR(trans, "Could not load the %s uCode section\n",
997 static int iwl_load_given_ucode(struct iwl_trans *trans, struct fw_img *image)
1001 ret = iwl_load_section(trans, "INST", &image->code,
1002 IWLAGN_RTC_INST_LOWER_BOUND);
1006 ret = iwl_load_section(trans, "DATA", &image->data,
1007 IWLAGN_RTC_DATA_LOWER_BOUND);
1011 /* Remove all resets to allow NIC to operate */
1012 iwl_write32(trans, CSR_RESET, 0);
1017 static int iwl_trans_pcie_start_fw(struct iwl_trans *trans, struct fw_img *fw)
1020 struct iwl_trans_pcie *trans_pcie =
1021 IWL_TRANS_GET_PCIE_TRANS(trans);
1023 trans->shrd->ucode_owner = IWL_OWNERSHIP_DRIVER;
1024 trans_pcie->ac_to_queue[IWL_RXON_CTX_BSS] = iwlagn_bss_ac_to_queue;
1025 trans_pcie->ac_to_queue[IWL_RXON_CTX_PAN] = iwlagn_pan_ac_to_queue;
1027 trans_pcie->ac_to_fifo[IWL_RXON_CTX_BSS] = iwlagn_bss_ac_to_fifo;
1028 trans_pcie->ac_to_fifo[IWL_RXON_CTX_PAN] = iwlagn_pan_ac_to_fifo;
1030 trans_pcie->mcast_queue[IWL_RXON_CTX_BSS] = 0;
1031 trans_pcie->mcast_queue[IWL_RXON_CTX_PAN] = IWL_IPAN_MCAST_QUEUE;
1033 if ((hw_params(trans).sku & EEPROM_SKU_CAP_AMT_ENABLE) &&
1034 iwl_prepare_card_hw(trans)) {
1035 IWL_WARN(trans, "Exit HW not ready\n");
1039 /* If platform's RF_KILL switch is NOT set to KILL */
1040 if (iwl_read32(trans, CSR_GP_CNTRL) &
1041 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
1042 clear_bit(STATUS_RF_KILL_HW, &trans->shrd->status);
1044 set_bit(STATUS_RF_KILL_HW, &trans->shrd->status);
1046 if (iwl_is_rfkill(trans->shrd)) {
1047 iwl_set_hw_rfkill_state(priv(trans), true);
1048 iwl_enable_interrupts(trans);
1052 iwl_write32(trans, CSR_INT, 0xFFFFFFFF);
1054 ret = iwl_nic_init(trans);
1056 IWL_ERR(trans, "Unable to init nic\n");
1060 /* make sure rfkill handshake bits are cleared */
1061 iwl_write32(trans, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1062 iwl_write32(trans, CSR_UCODE_DRV_GP1_CLR,
1063 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
1065 /* clear (again), then enable host interrupts */
1066 iwl_write32(trans, CSR_INT, 0xFFFFFFFF);
1067 iwl_enable_interrupts(trans);
1069 /* really make sure rfkill handshake bits are cleared */
1070 iwl_write32(trans, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1071 iwl_write32(trans, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1073 /* Load the given image to the HW */
1074 iwl_load_given_ucode(trans, fw);
1080 * Activate/Deactivate Tx DMA/FIFO channels according tx fifos mask
1081 * must be called under priv->shrd->lock and mac access
1083 static void iwl_trans_txq_set_sched(struct iwl_trans *trans, u32 mask)
1085 iwl_write_prph(trans, SCD_TXFACT, mask);
1088 static void iwl_tx_start(struct iwl_trans *trans)
1090 const struct queue_to_fifo_ac *queue_to_fifo;
1091 struct iwl_trans_pcie *trans_pcie =
1092 IWL_TRANS_GET_PCIE_TRANS(trans);
1094 unsigned long flags;
1098 spin_lock_irqsave(&trans->shrd->lock, flags);
1100 trans_pcie->scd_base_addr =
1101 iwl_read_prph(trans, SCD_SRAM_BASE_ADDR);
1102 a = trans_pcie->scd_base_addr + SCD_CONTEXT_MEM_LOWER_BOUND;
1103 /* reset conext data memory */
1104 for (; a < trans_pcie->scd_base_addr + SCD_CONTEXT_MEM_UPPER_BOUND;
1106 iwl_write_targ_mem(trans, a, 0);
1107 /* reset tx status memory */
1108 for (; a < trans_pcie->scd_base_addr + SCD_TX_STTS_MEM_UPPER_BOUND;
1110 iwl_write_targ_mem(trans, a, 0);
1111 for (; a < trans_pcie->scd_base_addr +
1112 SCD_TRANS_TBL_OFFSET_QUEUE(hw_params(trans).max_txq_num);
1114 iwl_write_targ_mem(trans, a, 0);
1116 iwl_write_prph(trans, SCD_DRAM_BASE_ADDR,
1117 trans_pcie->scd_bc_tbls.dma >> 10);
1119 /* Enable DMA channel */
1120 for (chan = 0; chan < FH_TCSR_CHNL_NUM ; chan++)
1121 iwl_write_direct32(trans, FH_TCSR_CHNL_TX_CONFIG_REG(chan),
1122 FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE |
1123 FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE);
1125 /* Update FH chicken bits */
1126 reg_val = iwl_read_direct32(trans, FH_TX_CHICKEN_BITS_REG);
1127 iwl_write_direct32(trans, FH_TX_CHICKEN_BITS_REG,
1128 reg_val | FH_TX_CHICKEN_BITS_SCD_AUTO_RETRY_EN);
1130 iwl_write_prph(trans, SCD_QUEUECHAIN_SEL,
1131 SCD_QUEUECHAIN_SEL_ALL(trans));
1132 iwl_write_prph(trans, SCD_AGGR_SEL, 0);
1134 /* initiate the queues */
1135 for (i = 0; i < hw_params(trans).max_txq_num; i++) {
1136 iwl_write_prph(trans, SCD_QUEUE_RDPTR(i), 0);
1137 iwl_write_direct32(trans, HBUS_TARG_WRPTR, 0 | (i << 8));
1138 iwl_write_targ_mem(trans, trans_pcie->scd_base_addr +
1139 SCD_CONTEXT_QUEUE_OFFSET(i), 0);
1140 iwl_write_targ_mem(trans, trans_pcie->scd_base_addr +
1141 SCD_CONTEXT_QUEUE_OFFSET(i) +
1144 SCD_QUEUE_CTX_REG2_WIN_SIZE_POS) &
1145 SCD_QUEUE_CTX_REG2_WIN_SIZE_MSK) |
1146 ((SCD_FRAME_LIMIT <<
1147 SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) &
1148 SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK));
1151 iwl_write_prph(trans, SCD_INTERRUPT_MASK,
1152 IWL_MASK(0, hw_params(trans).max_txq_num));
1154 /* Activate all Tx DMA/FIFO channels */
1155 iwl_trans_txq_set_sched(trans, IWL_MASK(0, 7));
1157 /* map queues to FIFOs */
1158 if (trans->shrd->valid_contexts != BIT(IWL_RXON_CTX_BSS))
1159 queue_to_fifo = iwlagn_ipan_queue_to_tx_fifo;
1161 queue_to_fifo = iwlagn_default_queue_to_tx_fifo;
1163 iwl_trans_set_wr_ptrs(trans, trans->shrd->cmd_queue, 0);
1165 /* make sure all queue are not stopped */
1166 memset(&trans_pcie->queue_stopped[0], 0,
1167 sizeof(trans_pcie->queue_stopped));
1168 for (i = 0; i < 4; i++)
1169 atomic_set(&trans_pcie->queue_stop_count[i], 0);
1171 /* reset to 0 to enable all the queue first */
1172 trans_pcie->txq_ctx_active_msk = 0;
1174 BUILD_BUG_ON(ARRAY_SIZE(iwlagn_default_queue_to_tx_fifo) <
1175 IWLAGN_FIRST_AMPDU_QUEUE);
1176 BUILD_BUG_ON(ARRAY_SIZE(iwlagn_ipan_queue_to_tx_fifo) <
1177 IWLAGN_FIRST_AMPDU_QUEUE);
1179 for (i = 0; i < IWLAGN_FIRST_AMPDU_QUEUE; i++) {
1180 int fifo = queue_to_fifo[i].fifo;
1181 int ac = queue_to_fifo[i].ac;
1183 iwl_txq_ctx_activate(trans_pcie, i);
1185 if (fifo == IWL_TX_FIFO_UNUSED)
1188 if (ac != IWL_AC_UNSET)
1189 iwl_set_swq_id(&trans_pcie->txq[i], ac, i);
1190 iwl_trans_tx_queue_set_status(trans, &trans_pcie->txq[i],
1194 spin_unlock_irqrestore(&trans->shrd->lock, flags);
1196 /* Enable L1-Active */
1197 iwl_clear_bits_prph(trans, APMG_PCIDEV_STT_REG,
1198 APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
1201 static void iwl_trans_pcie_fw_alive(struct iwl_trans *trans)
1203 iwl_reset_ict(trans);
1204 iwl_tx_start(trans);
1208 * iwlagn_txq_ctx_stop - Stop all Tx DMA channels
1210 static int iwl_trans_tx_stop(struct iwl_trans *trans)
1213 unsigned long flags;
1214 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1216 /* Turn off all Tx DMA fifos */
1217 spin_lock_irqsave(&trans->shrd->lock, flags);
1219 iwl_trans_txq_set_sched(trans, 0);
1221 /* Stop each Tx DMA channel, and wait for it to be idle */
1222 for (ch = 0; ch < FH_TCSR_CHNL_NUM; ch++) {
1223 iwl_write_direct32(trans,
1224 FH_TCSR_CHNL_TX_CONFIG_REG(ch), 0x0);
1225 if (iwl_poll_direct_bit(trans, FH_TSSR_TX_STATUS_REG,
1226 FH_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(ch),
1228 IWL_ERR(trans, "Failing on timeout while stopping"
1229 " DMA channel %d [0x%08x]", ch,
1230 iwl_read_direct32(trans,
1231 FH_TSSR_TX_STATUS_REG));
1233 spin_unlock_irqrestore(&trans->shrd->lock, flags);
1235 if (!trans_pcie->txq) {
1236 IWL_WARN(trans, "Stopping tx queues that aren't allocated...");
1240 /* Unmap DMA from host system and free skb's */
1241 for (txq_id = 0; txq_id < hw_params(trans).max_txq_num; txq_id++)
1242 iwl_tx_queue_unmap(trans, txq_id);
1247 static void iwl_trans_pcie_stop_device(struct iwl_trans *trans)
1249 unsigned long flags;
1250 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1252 /* tell the device to stop sending interrupts */
1253 spin_lock_irqsave(&trans->shrd->lock, flags);
1254 iwl_disable_interrupts(trans);
1255 spin_unlock_irqrestore(&trans->shrd->lock, flags);
1257 /* device going down, Stop using ICT table */
1258 iwl_disable_ict(trans);
1261 * If a HW restart happens during firmware loading,
1262 * then the firmware loading might call this function
1263 * and later it might be called again due to the
1264 * restart. So don't process again if the device is
1267 if (test_bit(STATUS_DEVICE_ENABLED, &trans->shrd->status)) {
1268 iwl_trans_tx_stop(trans);
1269 #ifndef CONFIG_IWLWIFI_IDI
1270 iwl_trans_rx_stop(trans);
1272 /* Power-down device's busmaster DMA clocks */
1273 iwl_write_prph(trans, APMG_CLK_DIS_REG,
1274 APMG_CLK_VAL_DMA_CLK_RQT);
1278 /* Make sure (redundant) we've released our request to stay awake */
1279 iwl_clear_bit(trans, CSR_GP_CNTRL,
1280 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
1282 /* Stop the device, and put it in low power state */
1283 iwl_apm_stop(trans);
1285 /* Upon stop, the APM issues an interrupt if HW RF kill is set.
1286 * Clean again the interrupt here
1288 spin_lock_irqsave(&trans->shrd->lock, flags);
1289 iwl_disable_interrupts(trans);
1290 spin_unlock_irqrestore(&trans->shrd->lock, flags);
1292 /* wait to make sure we flush pending tasklet*/
1293 synchronize_irq(trans->irq);
1294 tasklet_kill(&trans_pcie->irq_tasklet);
1296 /* stop and reset the on-board processor */
1297 iwl_write32(trans, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
1300 static int iwl_trans_pcie_tx(struct iwl_trans *trans, struct sk_buff *skb,
1301 struct iwl_device_cmd *dev_cmd, enum iwl_rxon_context_id ctx,
1304 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1305 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1306 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1307 struct iwl_tx_cmd *tx_cmd = (struct iwl_tx_cmd *) dev_cmd->payload;
1308 struct iwl_cmd_meta *out_meta;
1309 struct iwl_tx_queue *txq;
1310 struct iwl_queue *q;
1312 dma_addr_t phys_addr = 0;
1313 dma_addr_t txcmd_phys;
1314 dma_addr_t scratch_phys;
1315 u16 len, firstlen, secondlen;
1316 u8 wait_write_ptr = 0;
1318 bool is_agg = false;
1319 __le16 fc = hdr->frame_control;
1320 u8 hdr_len = ieee80211_hdrlen(fc);
1321 u16 __maybe_unused wifi_seq;
1324 * Send this frame after DTIM -- there's a special queue
1325 * reserved for this for contexts that support AP mode.
1327 if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) {
1328 txq_id = trans_pcie->mcast_queue[ctx];
1331 * The microcode will clear the more data
1332 * bit in the last frame it transmits.
1334 hdr->frame_control |=
1335 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
1336 } else if (info->flags & IEEE80211_TX_CTL_TX_OFFCHAN)
1337 txq_id = IWL_AUX_QUEUE;
1340 trans_pcie->ac_to_queue[ctx][skb_get_queue_mapping(skb)];
1342 /* aggregation is on for this <sta,tid> */
1343 if (info->flags & IEEE80211_TX_CTL_AMPDU) {
1344 WARN_ON(tid >= IWL_MAX_TID_COUNT);
1345 txq_id = trans_pcie->agg_txq[sta_id][tid];
1349 txq = &trans_pcie->txq[txq_id];
1352 /* In AGG mode, the index in the ring must correspond to the WiFi
1353 * sequence number. This is a HW requirements to help the SCD to parse
1355 * Check here that the packets are in the right place on the ring.
1357 #ifdef CONFIG_IWLWIFI_DEBUG
1358 wifi_seq = SEQ_TO_SN(le16_to_cpu(hdr->seq_ctrl));
1359 WARN_ONCE(is_agg && ((wifi_seq & 0xff) != q->write_ptr),
1360 "Q: %d WiFi Seq %d tfdNum %d",
1361 txq_id, wifi_seq, q->write_ptr);
1364 /* Set up driver data for this TFD */
1365 txq->skbs[q->write_ptr] = skb;
1366 txq->cmd[q->write_ptr] = dev_cmd;
1368 dev_cmd->hdr.cmd = REPLY_TX;
1369 dev_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
1370 INDEX_TO_SEQ(q->write_ptr)));
1372 /* Set up first empty entry in queue's array of Tx/cmd buffers */
1373 out_meta = &txq->meta[q->write_ptr];
1376 * Use the first empty entry in this queue's command buffer array
1377 * to contain the Tx command and MAC header concatenated together
1378 * (payload data will be in another buffer).
1379 * Size of this varies, due to varying MAC header length.
1380 * If end is not dword aligned, we'll have 2 extra bytes at the end
1381 * of the MAC header (device reads on dword boundaries).
1382 * We'll tell device about this padding later.
1384 len = sizeof(struct iwl_tx_cmd) +
1385 sizeof(struct iwl_cmd_header) + hdr_len;
1386 firstlen = (len + 3) & ~3;
1388 /* Tell NIC about any 2-byte padding after MAC header */
1389 if (firstlen != len)
1390 tx_cmd->tx_flags |= TX_CMD_FLG_MH_PAD_MSK;
1392 /* Physical address of this Tx command's header (not MAC header!),
1393 * within command buffer array. */
1394 txcmd_phys = dma_map_single(trans->dev,
1395 &dev_cmd->hdr, firstlen,
1397 if (unlikely(dma_mapping_error(trans->dev, txcmd_phys)))
1399 dma_unmap_addr_set(out_meta, mapping, txcmd_phys);
1400 dma_unmap_len_set(out_meta, len, firstlen);
1402 if (!ieee80211_has_morefrags(fc)) {
1403 txq->need_update = 1;
1406 txq->need_update = 0;
1409 /* Set up TFD's 2nd entry to point directly to remainder of skb,
1410 * if any (802.11 null frames have no payload). */
1411 secondlen = skb->len - hdr_len;
1412 if (secondlen > 0) {
1413 phys_addr = dma_map_single(trans->dev, skb->data + hdr_len,
1414 secondlen, DMA_TO_DEVICE);
1415 if (unlikely(dma_mapping_error(trans->dev, phys_addr))) {
1416 dma_unmap_single(trans->dev,
1417 dma_unmap_addr(out_meta, mapping),
1418 dma_unmap_len(out_meta, len),
1424 /* Attach buffers to TFD */
1425 iwlagn_txq_attach_buf_to_tfd(trans, txq, txcmd_phys, firstlen, 1);
1427 iwlagn_txq_attach_buf_to_tfd(trans, txq, phys_addr,
1430 scratch_phys = txcmd_phys + sizeof(struct iwl_cmd_header) +
1431 offsetof(struct iwl_tx_cmd, scratch);
1433 /* take back ownership of DMA buffer to enable update */
1434 dma_sync_single_for_cpu(trans->dev, txcmd_phys, firstlen,
1436 tx_cmd->dram_lsb_ptr = cpu_to_le32(scratch_phys);
1437 tx_cmd->dram_msb_ptr = iwl_get_dma_hi_addr(scratch_phys);
1439 IWL_DEBUG_TX(trans, "sequence nr = 0X%x\n",
1440 le16_to_cpu(dev_cmd->hdr.sequence));
1441 IWL_DEBUG_TX(trans, "tx_flags = 0X%x\n", le32_to_cpu(tx_cmd->tx_flags));
1442 iwl_print_hex_dump(trans, IWL_DL_TX, (u8 *)tx_cmd, sizeof(*tx_cmd));
1443 iwl_print_hex_dump(trans, IWL_DL_TX, (u8 *)tx_cmd->hdr, hdr_len);
1445 /* Set up entry for this TFD in Tx byte-count array */
1446 iwl_trans_txq_update_byte_cnt_tbl(trans, txq, le16_to_cpu(tx_cmd->len));
1448 dma_sync_single_for_device(trans->dev, txcmd_phys, firstlen,
1451 trace_iwlwifi_dev_tx(priv(trans),
1452 &((struct iwl_tfd *)txq->tfds)[txq->q.write_ptr],
1453 sizeof(struct iwl_tfd),
1454 &dev_cmd->hdr, firstlen,
1455 skb->data + hdr_len, secondlen);
1457 /* Tell device the write index *just past* this latest filled TFD */
1458 q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
1459 iwl_txq_update_write_ptr(trans, txq);
1462 * At this point the frame is "transmitted" successfully
1463 * and we will get a TX status notification eventually,
1464 * regardless of the value of ret. "ret" only indicates
1465 * whether or not we should update the write pointer.
1467 if (iwl_queue_space(q) < q->high_mark) {
1468 if (wait_write_ptr) {
1469 txq->need_update = 1;
1470 iwl_txq_update_write_ptr(trans, txq);
1472 iwl_stop_queue(trans, txq, "Queue is full");
1478 static int iwl_trans_pcie_start_hw(struct iwl_trans *trans)
1480 struct iwl_trans_pcie *trans_pcie =
1481 IWL_TRANS_GET_PCIE_TRANS(trans);
1484 trans_pcie->inta_mask = CSR_INI_SET_MASK;
1486 if (!trans_pcie->irq_requested) {
1487 tasklet_init(&trans_pcie->irq_tasklet, (void (*)(unsigned long))
1488 iwl_irq_tasklet, (unsigned long)trans);
1490 iwl_alloc_isr_ict(trans);
1492 err = request_irq(trans->irq, iwl_isr_ict, IRQF_SHARED,
1495 IWL_ERR(trans, "Error allocating IRQ %d\n",
1500 INIT_WORK(&trans_pcie->rx_replenish, iwl_bg_rx_replenish);
1501 trans_pcie->irq_requested = true;
1504 err = iwl_prepare_card_hw(trans);
1506 IWL_ERR(trans, "Error while preparing HW: %d", err);
1510 iwl_apm_init(trans);
1512 /* If platform's RF_KILL switch is NOT set to KILL */
1513 if (iwl_read32(trans,
1514 CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
1515 clear_bit(STATUS_RF_KILL_HW, &trans->shrd->status);
1517 set_bit(STATUS_RF_KILL_HW, &trans->shrd->status);
1519 iwl_set_hw_rfkill_state(priv(trans),
1520 test_bit(STATUS_RF_KILL_HW,
1521 &trans->shrd->status));
1526 iwl_free_isr_ict(trans);
1527 tasklet_kill(&trans_pcie->irq_tasklet);
1531 static void iwl_trans_pcie_stop_hw(struct iwl_trans *trans)
1533 iwl_apm_stop(trans);
1535 /* Even if we stop the HW, we still want the RF kill interrupt */
1536 IWL_DEBUG_ISR(trans, "Enabling rfkill interrupt\n");
1537 iwl_write32(trans, CSR_INT_MASK, CSR_INT_BIT_RF_KILL);
1540 static int iwl_trans_pcie_reclaim(struct iwl_trans *trans, int sta_id, int tid,
1541 int txq_id, int ssn, u32 status,
1542 struct sk_buff_head *skbs)
1544 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1545 struct iwl_tx_queue *txq = &trans_pcie->txq[txq_id];
1546 /* n_bd is usually 256 => n_bd - 1 = 0xff */
1547 int tfd_num = ssn & (txq->q.n_bd - 1);
1550 txq->time_stamp = jiffies;
1552 if (unlikely(txq_id >= IWLAGN_FIRST_AMPDU_QUEUE &&
1553 txq_id != trans_pcie->agg_txq[sta_id][tid])) {
1555 * FIXME: this is a uCode bug which need to be addressed,
1556 * log the information and return for now.
1557 * Since it is can possibly happen very often and in order
1558 * not to fill the syslog, don't use IWL_ERR or IWL_WARN
1560 IWL_DEBUG_TX_QUEUES(trans, "Bad queue mapping txq_id %d, "
1561 "agg_txq[sta_id[tid] %d", txq_id,
1562 trans_pcie->agg_txq[sta_id][tid]);
1566 if (txq->q.read_ptr != tfd_num) {
1567 IWL_DEBUG_TX_REPLY(trans, "[Q %d | AC %d] %d -> %d (%d)\n",
1568 txq_id, iwl_get_queue_ac(txq), txq->q.read_ptr,
1570 freed = iwl_tx_queue_reclaim(trans, txq_id, tfd_num, skbs);
1571 if (iwl_queue_space(&txq->q) > txq->q.low_mark &&
1572 (!txq->sched_retry ||
1573 status != TX_STATUS_FAIL_PASSIVE_NO_RX))
1574 iwl_wake_queue(trans, txq, "Packets reclaimed");
1579 static void iwl_trans_pcie_write8(struct iwl_trans *trans, u32 ofs, u8 val)
1581 iowrite8(val, IWL_TRANS_GET_PCIE_TRANS(trans)->hw_base + ofs);
1584 static void iwl_trans_pcie_write32(struct iwl_trans *trans, u32 ofs, u32 val)
1586 iowrite32(val, IWL_TRANS_GET_PCIE_TRANS(trans)->hw_base + ofs);
1589 static u32 iwl_trans_pcie_read32(struct iwl_trans *trans, u32 ofs)
1591 u32 val = ioread32(IWL_TRANS_GET_PCIE_TRANS(trans)->hw_base + ofs);
1595 static void iwl_trans_pcie_free(struct iwl_trans *trans)
1597 struct iwl_trans_pcie *trans_pcie =
1598 IWL_TRANS_GET_PCIE_TRANS(trans);
1600 iwl_calib_free_results(trans);
1601 iwl_trans_pcie_tx_free(trans);
1602 #ifndef CONFIG_IWLWIFI_IDI
1603 iwl_trans_pcie_rx_free(trans);
1605 if (trans_pcie->irq_requested == true) {
1606 free_irq(trans->irq, trans);
1607 iwl_free_isr_ict(trans);
1610 pci_disable_msi(trans_pcie->pci_dev);
1611 pci_iounmap(trans_pcie->pci_dev, trans_pcie->hw_base);
1612 pci_release_regions(trans_pcie->pci_dev);
1613 pci_disable_device(trans_pcie->pci_dev);
1615 trans->shrd->trans = NULL;
1619 #ifdef CONFIG_PM_SLEEP
1620 static int iwl_trans_pcie_suspend(struct iwl_trans *trans)
1623 * This function is called when system goes into suspend state
1624 * mac80211 will call iwlagn_mac_stop() from the mac80211 suspend
1625 * function first but since iwlagn_mac_stop() has no knowledge of
1626 * who the caller is,
1627 * it will not call apm_ops.stop() to stop the DMA operation.
1628 * Calling apm_ops.stop here to make sure we stop the DMA.
1630 * But of course ... if we have configured WoWLAN then we did other
1631 * things already :-)
1633 if (!trans->shrd->wowlan) {
1634 iwl_apm_stop(trans);
1636 iwl_disable_interrupts(trans);
1637 iwl_clear_bit(trans, CSR_GP_CNTRL,
1638 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
1644 static int iwl_trans_pcie_resume(struct iwl_trans *trans)
1646 bool hw_rfkill = false;
1648 iwl_enable_interrupts(trans);
1650 if (!(iwl_read32(trans, CSR_GP_CNTRL) &
1651 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
1655 set_bit(STATUS_RF_KILL_HW, &trans->shrd->status);
1657 clear_bit(STATUS_RF_KILL_HW, &trans->shrd->status);
1659 iwl_set_hw_rfkill_state(priv(trans), hw_rfkill);
1663 #endif /* CONFIG_PM_SLEEP */
1665 static void iwl_trans_pcie_wake_any_queue(struct iwl_trans *trans,
1666 enum iwl_rxon_context_id ctx,
1670 struct iwl_trans_pcie *trans_pcie =
1671 IWL_TRANS_GET_PCIE_TRANS(trans);
1673 for (ac = 0; ac < AC_NUM; ac++) {
1674 txq_id = trans_pcie->ac_to_queue[ctx][ac];
1675 IWL_DEBUG_TX_QUEUES(trans, "Queue Status: Q[%d] %s\n",
1677 (atomic_read(&trans_pcie->queue_stop_count[ac]) > 0)
1678 ? "stopped" : "awake");
1679 iwl_wake_queue(trans, &trans_pcie->txq[txq_id], msg);
1683 static void iwl_trans_pcie_stop_queue(struct iwl_trans *trans, int txq_id,
1686 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1688 iwl_stop_queue(trans, &trans_pcie->txq[txq_id], msg);
1691 #define IWL_FLUSH_WAIT_MS 2000
1693 static int iwl_trans_pcie_wait_tx_queue_empty(struct iwl_trans *trans)
1695 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1696 struct iwl_tx_queue *txq;
1697 struct iwl_queue *q;
1699 unsigned long now = jiffies;
1702 /* waiting for all the tx frames complete might take a while */
1703 for (cnt = 0; cnt < hw_params(trans).max_txq_num; cnt++) {
1704 if (cnt == trans->shrd->cmd_queue)
1706 txq = &trans_pcie->txq[cnt];
1708 while (q->read_ptr != q->write_ptr && !time_after(jiffies,
1709 now + msecs_to_jiffies(IWL_FLUSH_WAIT_MS)))
1712 if (q->read_ptr != q->write_ptr) {
1713 IWL_ERR(trans, "fail to flush all tx fifo queues\n");
1722 * On every watchdog tick we check (latest) time stamp. If it does not
1723 * change during timeout period and queue is not empty we reset firmware.
1725 static int iwl_trans_pcie_check_stuck_queue(struct iwl_trans *trans, int cnt)
1727 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1728 struct iwl_tx_queue *txq = &trans_pcie->txq[cnt];
1729 struct iwl_queue *q = &txq->q;
1730 unsigned long timeout;
1732 if (q->read_ptr == q->write_ptr) {
1733 txq->time_stamp = jiffies;
1737 timeout = txq->time_stamp +
1738 msecs_to_jiffies(hw_params(trans).wd_timeout);
1740 if (time_after(jiffies, timeout)) {
1741 IWL_ERR(trans, "Queue %d stuck for %u ms.\n", q->id,
1742 hw_params(trans).wd_timeout);
1743 IWL_ERR(trans, "Current SW read_ptr %d write_ptr %d\n",
1744 q->read_ptr, q->write_ptr);
1745 IWL_ERR(trans, "Current HW read_ptr %d write_ptr %d\n",
1746 iwl_read_prph(trans, SCD_QUEUE_RDPTR(cnt))
1747 & (TFD_QUEUE_SIZE_MAX - 1),
1748 iwl_read_prph(trans, SCD_QUEUE_WRPTR(cnt)));
1755 static const char *get_fh_string(int cmd)
1758 IWL_CMD(FH_RSCSR_CHNL0_STTS_WPTR_REG);
1759 IWL_CMD(FH_RSCSR_CHNL0_RBDCB_BASE_REG);
1760 IWL_CMD(FH_RSCSR_CHNL0_WPTR);
1761 IWL_CMD(FH_MEM_RCSR_CHNL0_CONFIG_REG);
1762 IWL_CMD(FH_MEM_RSSR_SHARED_CTRL_REG);
1763 IWL_CMD(FH_MEM_RSSR_RX_STATUS_REG);
1764 IWL_CMD(FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV);
1765 IWL_CMD(FH_TSSR_TX_STATUS_REG);
1766 IWL_CMD(FH_TSSR_TX_ERROR_REG);
1772 int iwl_dump_fh(struct iwl_trans *trans, char **buf, bool display)
1775 #ifdef CONFIG_IWLWIFI_DEBUG
1779 static const u32 fh_tbl[] = {
1780 FH_RSCSR_CHNL0_STTS_WPTR_REG,
1781 FH_RSCSR_CHNL0_RBDCB_BASE_REG,
1782 FH_RSCSR_CHNL0_WPTR,
1783 FH_MEM_RCSR_CHNL0_CONFIG_REG,
1784 FH_MEM_RSSR_SHARED_CTRL_REG,
1785 FH_MEM_RSSR_RX_STATUS_REG,
1786 FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV,
1787 FH_TSSR_TX_STATUS_REG,
1788 FH_TSSR_TX_ERROR_REG
1790 #ifdef CONFIG_IWLWIFI_DEBUG
1792 bufsz = ARRAY_SIZE(fh_tbl) * 48 + 40;
1793 *buf = kmalloc(bufsz, GFP_KERNEL);
1796 pos += scnprintf(*buf + pos, bufsz - pos,
1797 "FH register values:\n");
1798 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) {
1799 pos += scnprintf(*buf + pos, bufsz - pos,
1801 get_fh_string(fh_tbl[i]),
1802 iwl_read_direct32(trans, fh_tbl[i]));
1807 IWL_ERR(trans, "FH register values:\n");
1808 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) {
1809 IWL_ERR(trans, " %34s: 0X%08x\n",
1810 get_fh_string(fh_tbl[i]),
1811 iwl_read_direct32(trans, fh_tbl[i]));
1816 static const char *get_csr_string(int cmd)
1819 IWL_CMD(CSR_HW_IF_CONFIG_REG);
1820 IWL_CMD(CSR_INT_COALESCING);
1822 IWL_CMD(CSR_INT_MASK);
1823 IWL_CMD(CSR_FH_INT_STATUS);
1824 IWL_CMD(CSR_GPIO_IN);
1826 IWL_CMD(CSR_GP_CNTRL);
1827 IWL_CMD(CSR_HW_REV);
1828 IWL_CMD(CSR_EEPROM_REG);
1829 IWL_CMD(CSR_EEPROM_GP);
1830 IWL_CMD(CSR_OTP_GP_REG);
1831 IWL_CMD(CSR_GIO_REG);
1832 IWL_CMD(CSR_GP_UCODE_REG);
1833 IWL_CMD(CSR_GP_DRIVER_REG);
1834 IWL_CMD(CSR_UCODE_DRV_GP1);
1835 IWL_CMD(CSR_UCODE_DRV_GP2);
1836 IWL_CMD(CSR_LED_REG);
1837 IWL_CMD(CSR_DRAM_INT_TBL_REG);
1838 IWL_CMD(CSR_GIO_CHICKEN_BITS);
1839 IWL_CMD(CSR_ANA_PLL_CFG);
1840 IWL_CMD(CSR_HW_REV_WA_REG);
1841 IWL_CMD(CSR_DBG_HPET_MEM_REG);
1847 void iwl_dump_csr(struct iwl_trans *trans)
1850 static const u32 csr_tbl[] = {
1851 CSR_HW_IF_CONFIG_REG,
1869 CSR_DRAM_INT_TBL_REG,
1870 CSR_GIO_CHICKEN_BITS,
1873 CSR_DBG_HPET_MEM_REG
1875 IWL_ERR(trans, "CSR values:\n");
1876 IWL_ERR(trans, "(2nd byte of CSR_INT_COALESCING is "
1877 "CSR_INT_PERIODIC_REG)\n");
1878 for (i = 0; i < ARRAY_SIZE(csr_tbl); i++) {
1879 IWL_ERR(trans, " %25s: 0X%08x\n",
1880 get_csr_string(csr_tbl[i]),
1881 iwl_read32(trans, csr_tbl[i]));
1885 #ifdef CONFIG_IWLWIFI_DEBUGFS
1886 /* create and remove of files */
1887 #define DEBUGFS_ADD_FILE(name, parent, mode) do { \
1888 if (!debugfs_create_file(#name, mode, parent, trans, \
1889 &iwl_dbgfs_##name##_ops)) \
1893 /* file operation */
1894 #define DEBUGFS_READ_FUNC(name) \
1895 static ssize_t iwl_dbgfs_##name##_read(struct file *file, \
1896 char __user *user_buf, \
1897 size_t count, loff_t *ppos);
1899 #define DEBUGFS_WRITE_FUNC(name) \
1900 static ssize_t iwl_dbgfs_##name##_write(struct file *file, \
1901 const char __user *user_buf, \
1902 size_t count, loff_t *ppos);
1905 static int iwl_dbgfs_open_file_generic(struct inode *inode, struct file *file)
1907 file->private_data = inode->i_private;
1911 #define DEBUGFS_READ_FILE_OPS(name) \
1912 DEBUGFS_READ_FUNC(name); \
1913 static const struct file_operations iwl_dbgfs_##name##_ops = { \
1914 .read = iwl_dbgfs_##name##_read, \
1915 .open = iwl_dbgfs_open_file_generic, \
1916 .llseek = generic_file_llseek, \
1919 #define DEBUGFS_WRITE_FILE_OPS(name) \
1920 DEBUGFS_WRITE_FUNC(name); \
1921 static const struct file_operations iwl_dbgfs_##name##_ops = { \
1922 .write = iwl_dbgfs_##name##_write, \
1923 .open = iwl_dbgfs_open_file_generic, \
1924 .llseek = generic_file_llseek, \
1927 #define DEBUGFS_READ_WRITE_FILE_OPS(name) \
1928 DEBUGFS_READ_FUNC(name); \
1929 DEBUGFS_WRITE_FUNC(name); \
1930 static const struct file_operations iwl_dbgfs_##name##_ops = { \
1931 .write = iwl_dbgfs_##name##_write, \
1932 .read = iwl_dbgfs_##name##_read, \
1933 .open = iwl_dbgfs_open_file_generic, \
1934 .llseek = generic_file_llseek, \
1937 static ssize_t iwl_dbgfs_tx_queue_read(struct file *file,
1938 char __user *user_buf,
1939 size_t count, loff_t *ppos)
1941 struct iwl_trans *trans = file->private_data;
1942 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1943 struct iwl_tx_queue *txq;
1944 struct iwl_queue *q;
1949 const size_t bufsz = sizeof(char) * 64 * hw_params(trans).max_txq_num;
1951 if (!trans_pcie->txq) {
1952 IWL_ERR(trans, "txq not ready\n");
1955 buf = kzalloc(bufsz, GFP_KERNEL);
1959 for (cnt = 0; cnt < hw_params(trans).max_txq_num; cnt++) {
1960 txq = &trans_pcie->txq[cnt];
1962 pos += scnprintf(buf + pos, bufsz - pos,
1963 "hwq %.2d: read=%u write=%u stop=%d"
1964 " swq_id=%#.2x (ac %d/hwq %d)\n",
1965 cnt, q->read_ptr, q->write_ptr,
1966 !!test_bit(cnt, trans_pcie->queue_stopped),
1967 txq->swq_id, txq->swq_id & 3,
1968 (txq->swq_id >> 2) & 0x1f);
1971 /* for the ACs, display the stop count too */
1972 pos += scnprintf(buf + pos, bufsz - pos,
1973 " stop-count: %d\n",
1974 atomic_read(&trans_pcie->queue_stop_count[cnt]));
1976 ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
1981 static ssize_t iwl_dbgfs_rx_queue_read(struct file *file,
1982 char __user *user_buf,
1983 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 iwl_rx_queue *rxq = &trans_pcie->rxq;
1990 const size_t bufsz = sizeof(buf);
1992 pos += scnprintf(buf + pos, bufsz - pos, "read: %u\n",
1994 pos += scnprintf(buf + pos, bufsz - pos, "write: %u\n",
1996 pos += scnprintf(buf + pos, bufsz - pos, "free_count: %u\n",
1999 pos += scnprintf(buf + pos, bufsz - pos, "closed_rb_num: %u\n",
2000 le16_to_cpu(rxq->rb_stts->closed_rb_num) & 0x0FFF);
2002 pos += scnprintf(buf + pos, bufsz - pos,
2003 "closed_rb_num: Not Allocated\n");
2005 return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
2008 static ssize_t iwl_dbgfs_log_event_read(struct file *file,
2009 char __user *user_buf,
2010 size_t count, loff_t *ppos)
2012 struct iwl_trans *trans = file->private_data;
2015 ssize_t ret = -ENOMEM;
2017 ret = pos = iwl_dump_nic_event_log(trans, true, &buf, true);
2019 ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
2025 static ssize_t iwl_dbgfs_log_event_write(struct file *file,
2026 const char __user *user_buf,
2027 size_t count, loff_t *ppos)
2029 struct iwl_trans *trans = file->private_data;
2034 memset(buf, 0, sizeof(buf));
2035 buf_size = min(count, sizeof(buf) - 1);
2036 if (copy_from_user(buf, user_buf, buf_size))
2038 if (sscanf(buf, "%d", &event_log_flag) != 1)
2040 if (event_log_flag == 1)
2041 iwl_dump_nic_event_log(trans, true, NULL, false);
2046 static ssize_t iwl_dbgfs_interrupt_read(struct file *file,
2047 char __user *user_buf,
2048 size_t count, loff_t *ppos) {
2050 struct iwl_trans *trans = file->private_data;
2051 struct iwl_trans_pcie *trans_pcie =
2052 IWL_TRANS_GET_PCIE_TRANS(trans);
2053 struct isr_statistics *isr_stats = &trans_pcie->isr_stats;
2057 int bufsz = 24 * 64; /* 24 items * 64 char per item */
2060 buf = kzalloc(bufsz, GFP_KERNEL);
2062 IWL_ERR(trans, "Can not allocate Buffer\n");
2066 pos += scnprintf(buf + pos, bufsz - pos,
2067 "Interrupt Statistics Report:\n");
2069 pos += scnprintf(buf + pos, bufsz - pos, "HW Error:\t\t\t %u\n",
2071 pos += scnprintf(buf + pos, bufsz - pos, "SW Error:\t\t\t %u\n",
2073 if (isr_stats->sw || isr_stats->hw) {
2074 pos += scnprintf(buf + pos, bufsz - pos,
2075 "\tLast Restarting Code: 0x%X\n",
2076 isr_stats->err_code);
2078 #ifdef CONFIG_IWLWIFI_DEBUG
2079 pos += scnprintf(buf + pos, bufsz - pos, "Frame transmitted:\t\t %u\n",
2081 pos += scnprintf(buf + pos, bufsz - pos, "Alive interrupt:\t\t %u\n",
2084 pos += scnprintf(buf + pos, bufsz - pos,
2085 "HW RF KILL switch toggled:\t %u\n", isr_stats->rfkill);
2087 pos += scnprintf(buf + pos, bufsz - pos, "CT KILL:\t\t\t %u\n",
2090 pos += scnprintf(buf + pos, bufsz - pos, "Wakeup Interrupt:\t\t %u\n",
2093 pos += scnprintf(buf + pos, bufsz - pos,
2094 "Rx command responses:\t\t %u\n", isr_stats->rx);
2096 pos += scnprintf(buf + pos, bufsz - pos, "Tx/FH interrupt:\t\t %u\n",
2099 pos += scnprintf(buf + pos, bufsz - pos, "Unexpected INTA:\t\t %u\n",
2100 isr_stats->unhandled);
2102 ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
2107 static ssize_t iwl_dbgfs_interrupt_write(struct file *file,
2108 const char __user *user_buf,
2109 size_t count, loff_t *ppos)
2111 struct iwl_trans *trans = file->private_data;
2112 struct iwl_trans_pcie *trans_pcie =
2113 IWL_TRANS_GET_PCIE_TRANS(trans);
2114 struct isr_statistics *isr_stats = &trans_pcie->isr_stats;
2120 memset(buf, 0, sizeof(buf));
2121 buf_size = min(count, sizeof(buf) - 1);
2122 if (copy_from_user(buf, user_buf, buf_size))
2124 if (sscanf(buf, "%x", &reset_flag) != 1)
2126 if (reset_flag == 0)
2127 memset(isr_stats, 0, sizeof(*isr_stats));
2132 static ssize_t iwl_dbgfs_csr_write(struct file *file,
2133 const char __user *user_buf,
2134 size_t count, loff_t *ppos)
2136 struct iwl_trans *trans = file->private_data;
2141 memset(buf, 0, sizeof(buf));
2142 buf_size = min(count, sizeof(buf) - 1);
2143 if (copy_from_user(buf, user_buf, buf_size))
2145 if (sscanf(buf, "%d", &csr) != 1)
2148 iwl_dump_csr(trans);
2153 static ssize_t iwl_dbgfs_fh_reg_read(struct file *file,
2154 char __user *user_buf,
2155 size_t count, loff_t *ppos)
2157 struct iwl_trans *trans = file->private_data;
2160 ssize_t ret = -EFAULT;
2162 ret = pos = iwl_dump_fh(trans, &buf, true);
2164 ret = simple_read_from_buffer(user_buf,
2165 count, ppos, buf, pos);
2172 DEBUGFS_READ_WRITE_FILE_OPS(log_event);
2173 DEBUGFS_READ_WRITE_FILE_OPS(interrupt);
2174 DEBUGFS_READ_FILE_OPS(fh_reg);
2175 DEBUGFS_READ_FILE_OPS(rx_queue);
2176 DEBUGFS_READ_FILE_OPS(tx_queue);
2177 DEBUGFS_WRITE_FILE_OPS(csr);
2180 * Create the debugfs files and directories
2183 static int iwl_trans_pcie_dbgfs_register(struct iwl_trans *trans,
2186 DEBUGFS_ADD_FILE(rx_queue, dir, S_IRUSR);
2187 DEBUGFS_ADD_FILE(tx_queue, dir, S_IRUSR);
2188 DEBUGFS_ADD_FILE(log_event, dir, S_IWUSR | S_IRUSR);
2189 DEBUGFS_ADD_FILE(interrupt, dir, S_IWUSR | S_IRUSR);
2190 DEBUGFS_ADD_FILE(csr, dir, S_IWUSR);
2191 DEBUGFS_ADD_FILE(fh_reg, dir, S_IRUSR);
2195 static int iwl_trans_pcie_dbgfs_register(struct iwl_trans *trans,
2199 #endif /*CONFIG_IWLWIFI_DEBUGFS */
2201 const struct iwl_trans_ops trans_ops_pcie = {
2202 .start_hw = iwl_trans_pcie_start_hw,
2203 .stop_hw = iwl_trans_pcie_stop_hw,
2204 .fw_alive = iwl_trans_pcie_fw_alive,
2205 .start_fw = iwl_trans_pcie_start_fw,
2206 .stop_device = iwl_trans_pcie_stop_device,
2208 .wake_any_queue = iwl_trans_pcie_wake_any_queue,
2210 .send_cmd = iwl_trans_pcie_send_cmd,
2212 .tx = iwl_trans_pcie_tx,
2213 .reclaim = iwl_trans_pcie_reclaim,
2215 .tx_agg_disable = iwl_trans_pcie_tx_agg_disable,
2216 .tx_agg_alloc = iwl_trans_pcie_tx_agg_alloc,
2217 .tx_agg_setup = iwl_trans_pcie_tx_agg_setup,
2219 .free = iwl_trans_pcie_free,
2220 .stop_queue = iwl_trans_pcie_stop_queue,
2222 .dbgfs_register = iwl_trans_pcie_dbgfs_register,
2224 .wait_tx_queue_empty = iwl_trans_pcie_wait_tx_queue_empty,
2225 .check_stuck_queue = iwl_trans_pcie_check_stuck_queue,
2227 #ifdef CONFIG_PM_SLEEP
2228 .suspend = iwl_trans_pcie_suspend,
2229 .resume = iwl_trans_pcie_resume,
2231 .write8 = iwl_trans_pcie_write8,
2232 .write32 = iwl_trans_pcie_write32,
2233 .read32 = iwl_trans_pcie_read32,
2236 struct iwl_trans *iwl_trans_pcie_alloc(struct iwl_shared *shrd,
2237 struct pci_dev *pdev,
2238 const struct pci_device_id *ent)
2240 struct iwl_trans_pcie *trans_pcie;
2241 struct iwl_trans *trans;
2245 trans = kzalloc(sizeof(struct iwl_trans) +
2246 sizeof(struct iwl_trans_pcie), GFP_KERNEL);
2248 if (WARN_ON(!trans))
2251 trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2253 trans->ops = &trans_ops_pcie;
2255 trans_pcie->trans = trans;
2256 spin_lock_init(&trans->hcmd_lock);
2258 /* W/A - seems to solve weird behavior. We need to remove this if we
2259 * don't want to stay in L1 all the time. This wastes a lot of power */
2260 pci_disable_link_state(pdev, PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1 |
2261 PCIE_LINK_STATE_CLKPM);
2263 if (pci_enable_device(pdev)) {
2268 pci_set_master(pdev);
2270 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(36));
2272 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(36));
2274 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
2276 err = pci_set_consistent_dma_mask(pdev,
2278 /* both attempts failed: */
2280 dev_printk(KERN_ERR, &pdev->dev,
2281 "No suitable DMA available.\n");
2282 goto out_pci_disable_device;
2286 err = pci_request_regions(pdev, DRV_NAME);
2288 dev_printk(KERN_ERR, &pdev->dev, "pci_request_regions failed");
2289 goto out_pci_disable_device;
2292 trans_pcie->hw_base = pci_iomap(pdev, 0, 0);
2293 if (!trans_pcie->hw_base) {
2294 dev_printk(KERN_ERR, &pdev->dev, "pci_iomap failed");
2296 goto out_pci_release_regions;
2299 dev_printk(KERN_INFO, &pdev->dev,
2300 "pci_resource_len = 0x%08llx\n",
2301 (unsigned long long) pci_resource_len(pdev, 0));
2302 dev_printk(KERN_INFO, &pdev->dev,
2303 "pci_resource_base = %p\n", trans_pcie->hw_base);
2305 dev_printk(KERN_INFO, &pdev->dev,
2306 "HW Revision ID = 0x%X\n", pdev->revision);
2308 /* We disable the RETRY_TIMEOUT register (0x41) to keep
2309 * PCI Tx retries from interfering with C3 CPU state */
2310 pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
2312 err = pci_enable_msi(pdev);
2314 dev_printk(KERN_ERR, &pdev->dev,
2315 "pci_enable_msi failed(0X%x)", err);
2317 trans->dev = &pdev->dev;
2318 trans->irq = pdev->irq;
2319 trans_pcie->pci_dev = pdev;
2320 trans->hw_id = (pdev->device << 16) + pdev->subsystem_device;
2321 snprintf(trans->hw_id_str, sizeof(trans->hw_id_str),
2322 "PCI ID: 0x%04X:0x%04X", pdev->device, pdev->subsystem_device);
2324 /* TODO: Move this away, not needed if not MSI */
2325 /* enable rfkill interrupt: hw bug w/a */
2326 pci_read_config_word(pdev, PCI_COMMAND, &pci_cmd);
2327 if (pci_cmd & PCI_COMMAND_INTX_DISABLE) {
2328 pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
2329 pci_write_config_word(pdev, PCI_COMMAND, pci_cmd);
2334 out_pci_release_regions:
2335 pci_release_regions(pdev);
2336 out_pci_disable_device:
2337 pci_disable_device(pdev);