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RDMA/nes: don't leak skb if carrier down
[deliverable/linux.git] / drivers / net / wireless / intel / iwlwifi / pcie / trans.c
1 /******************************************************************************
2 *
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.
5 *
6 * GPL LICENSE SUMMARY
7 *
8 * Copyright(c) 2007 - 2015 Intel Corporation. All rights reserved.
9 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
10 * Copyright(c) 2016 Intel Deutschland GmbH
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of version 2 of the GNU General Public License as
14 * published by the Free Software Foundation.
15 *
16 * This program is distributed in the hope that it will be useful, but
17 * WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 * General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
24 * USA
25 *
26 * The full GNU General Public License is included in this distribution
27 * in the file called COPYING.
28 *
29 * Contact Information:
30 * Intel Linux Wireless <linuxwifi@intel.com>
31 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
32 *
33 * BSD LICENSE
34 *
35 * Copyright(c) 2005 - 2015 Intel Corporation. All rights reserved.
36 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
37 * Copyright(c) 2016 Intel Deutschland GmbH
38 * All rights reserved.
39 *
40 * Redistribution and use in source and binary forms, with or without
41 * modification, are permitted provided that the following conditions
42 * are met:
43 *
44 * * Redistributions of source code must retain the above copyright
45 * notice, this list of conditions and the following disclaimer.
46 * * Redistributions in binary form must reproduce the above copyright
47 * notice, this list of conditions and the following disclaimer in
48 * the documentation and/or other materials provided with the
49 * distribution.
50 * * Neither the name Intel Corporation nor the names of its
51 * contributors may be used to endorse or promote products derived
52 * from this software without specific prior written permission.
53 *
54 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
55 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
56 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
57 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
58 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
59 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
60 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
61 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
62 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
63 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
64 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
65 *
66 *****************************************************************************/
67 #include <linux/pci.h>
68 #include <linux/pci-aspm.h>
69 #include <linux/interrupt.h>
70 #include <linux/debugfs.h>
71 #include <linux/sched.h>
72 #include <linux/bitops.h>
73 #include <linux/gfp.h>
74 #include <linux/vmalloc.h>
75 #include <linux/pm_runtime.h>
76
77 #include "iwl-drv.h"
78 #include "iwl-trans.h"
79 #include "iwl-csr.h"
80 #include "iwl-prph.h"
81 #include "iwl-scd.h"
82 #include "iwl-agn-hw.h"
83 #include "iwl-fw-error-dump.h"
84 #include "internal.h"
85 #include "iwl-fh.h"
86
87 /* extended range in FW SRAM */
88 #define IWL_FW_MEM_EXTENDED_START 0x40000
89 #define IWL_FW_MEM_EXTENDED_END 0x57FFF
90
91 static void iwl_pcie_free_fw_monitor(struct iwl_trans *trans)
92 {
93 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
94
95 if (!trans_pcie->fw_mon_page)
96 return;
97
98 dma_unmap_page(trans->dev, trans_pcie->fw_mon_phys,
99 trans_pcie->fw_mon_size, DMA_FROM_DEVICE);
100 __free_pages(trans_pcie->fw_mon_page,
101 get_order(trans_pcie->fw_mon_size));
102 trans_pcie->fw_mon_page = NULL;
103 trans_pcie->fw_mon_phys = 0;
104 trans_pcie->fw_mon_size = 0;
105 }
106
107 static void iwl_pcie_alloc_fw_monitor(struct iwl_trans *trans, u8 max_power)
108 {
109 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
110 struct page *page = NULL;
111 dma_addr_t phys;
112 u32 size = 0;
113 u8 power;
114
115 if (!max_power) {
116 /* default max_power is maximum */
117 max_power = 26;
118 } else {
119 max_power += 11;
120 }
121
122 if (WARN(max_power > 26,
123 "External buffer size for monitor is too big %d, check the FW TLV\n",
124 max_power))
125 return;
126
127 if (trans_pcie->fw_mon_page) {
128 dma_sync_single_for_device(trans->dev, trans_pcie->fw_mon_phys,
129 trans_pcie->fw_mon_size,
130 DMA_FROM_DEVICE);
131 return;
132 }
133
134 phys = 0;
135 for (power = max_power; power >= 11; power--) {
136 int order;
137
138 size = BIT(power);
139 order = get_order(size);
140 page = alloc_pages(__GFP_COMP | __GFP_NOWARN | __GFP_ZERO,
141 order);
142 if (!page)
143 continue;
144
145 phys = dma_map_page(trans->dev, page, 0, PAGE_SIZE << order,
146 DMA_FROM_DEVICE);
147 if (dma_mapping_error(trans->dev, phys)) {
148 __free_pages(page, order);
149 page = NULL;
150 continue;
151 }
152 IWL_INFO(trans,
153 "Allocated 0x%08x bytes (order %d) for firmware monitor.\n",
154 size, order);
155 break;
156 }
157
158 if (WARN_ON_ONCE(!page))
159 return;
160
161 if (power != max_power)
162 IWL_ERR(trans,
163 "Sorry - debug buffer is only %luK while you requested %luK\n",
164 (unsigned long)BIT(power - 10),
165 (unsigned long)BIT(max_power - 10));
166
167 trans_pcie->fw_mon_page = page;
168 trans_pcie->fw_mon_phys = phys;
169 trans_pcie->fw_mon_size = size;
170 }
171
172 static u32 iwl_trans_pcie_read_shr(struct iwl_trans *trans, u32 reg)
173 {
174 iwl_write32(trans, HEEP_CTRL_WRD_PCIEX_CTRL_REG,
175 ((reg & 0x0000ffff) | (2 << 28)));
176 return iwl_read32(trans, HEEP_CTRL_WRD_PCIEX_DATA_REG);
177 }
178
179 static void iwl_trans_pcie_write_shr(struct iwl_trans *trans, u32 reg, u32 val)
180 {
181 iwl_write32(trans, HEEP_CTRL_WRD_PCIEX_DATA_REG, val);
182 iwl_write32(trans, HEEP_CTRL_WRD_PCIEX_CTRL_REG,
183 ((reg & 0x0000ffff) | (3 << 28)));
184 }
185
186 static void iwl_pcie_set_pwr(struct iwl_trans *trans, bool vaux)
187 {
188 if (trans->cfg->apmg_not_supported)
189 return;
190
191 if (vaux && pci_pme_capable(to_pci_dev(trans->dev), PCI_D3cold))
192 iwl_set_bits_mask_prph(trans, APMG_PS_CTRL_REG,
193 APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
194 ~APMG_PS_CTRL_MSK_PWR_SRC);
195 else
196 iwl_set_bits_mask_prph(trans, APMG_PS_CTRL_REG,
197 APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
198 ~APMG_PS_CTRL_MSK_PWR_SRC);
199 }
200
201 /* PCI registers */
202 #define PCI_CFG_RETRY_TIMEOUT 0x041
203
204 static void iwl_pcie_apm_config(struct iwl_trans *trans)
205 {
206 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
207 u16 lctl;
208 u16 cap;
209
210 /*
211 * HW bug W/A for instability in PCIe bus L0S->L1 transition.
212 * Check if BIOS (or OS) enabled L1-ASPM on this device.
213 * If so (likely), disable L0S, so device moves directly L0->L1;
214 * costs negligible amount of power savings.
215 * If not (unlikely), enable L0S, so there is at least some
216 * power savings, even without L1.
217 */
218 pcie_capability_read_word(trans_pcie->pci_dev, PCI_EXP_LNKCTL, &lctl);
219 if (lctl & PCI_EXP_LNKCTL_ASPM_L1)
220 iwl_set_bit(trans, CSR_GIO_REG, CSR_GIO_REG_VAL_L0S_ENABLED);
221 else
222 iwl_clear_bit(trans, CSR_GIO_REG, CSR_GIO_REG_VAL_L0S_ENABLED);
223 trans->pm_support = !(lctl & PCI_EXP_LNKCTL_ASPM_L0S);
224
225 pcie_capability_read_word(trans_pcie->pci_dev, PCI_EXP_DEVCTL2, &cap);
226 trans->ltr_enabled = cap & PCI_EXP_DEVCTL2_LTR_EN;
227 dev_info(trans->dev, "L1 %sabled - LTR %sabled\n",
228 (lctl & PCI_EXP_LNKCTL_ASPM_L1) ? "En" : "Dis",
229 trans->ltr_enabled ? "En" : "Dis");
230 }
231
232 /*
233 * Start up NIC's basic functionality after it has been reset
234 * (e.g. after platform boot, or shutdown via iwl_pcie_apm_stop())
235 * NOTE: This does not load uCode nor start the embedded processor
236 */
237 static int iwl_pcie_apm_init(struct iwl_trans *trans)
238 {
239 int ret = 0;
240 IWL_DEBUG_INFO(trans, "Init card's basic functions\n");
241
242 /*
243 * Use "set_bit" below rather than "write", to preserve any hardware
244 * bits already set by default after reset.
245 */
246
247 /* Disable L0S exit timer (platform NMI Work/Around) */
248 if (trans->cfg->device_family != IWL_DEVICE_FAMILY_8000)
249 iwl_set_bit(trans, CSR_GIO_CHICKEN_BITS,
250 CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
251
252 /*
253 * Disable L0s without affecting L1;
254 * don't wait for ICH L0s (ICH bug W/A)
255 */
256 iwl_set_bit(trans, CSR_GIO_CHICKEN_BITS,
257 CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
258
259 /* Set FH wait threshold to maximum (HW error during stress W/A) */
260 iwl_set_bit(trans, CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL);
261
262 /*
263 * Enable HAP INTA (interrupt from management bus) to
264 * wake device's PCI Express link L1a -> L0s
265 */
266 iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG,
267 CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
268
269 iwl_pcie_apm_config(trans);
270
271 /* Configure analog phase-lock-loop before activating to D0A */
272 if (trans->cfg->base_params->pll_cfg_val)
273 iwl_set_bit(trans, CSR_ANA_PLL_CFG,
274 trans->cfg->base_params->pll_cfg_val);
275
276 /*
277 * Set "initialization complete" bit to move adapter from
278 * D0U* --> D0A* (powered-up active) state.
279 */
280 iwl_set_bit(trans, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
281
282 /*
283 * Wait for clock stabilization; once stabilized, access to
284 * device-internal resources is supported, e.g. iwl_write_prph()
285 * and accesses to uCode SRAM.
286 */
287 ret = iwl_poll_bit(trans, CSR_GP_CNTRL,
288 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
289 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
290 if (ret < 0) {
291 IWL_DEBUG_INFO(trans, "Failed to init the card\n");
292 goto out;
293 }
294
295 if (trans->cfg->host_interrupt_operation_mode) {
296 /*
297 * This is a bit of an abuse - This is needed for 7260 / 3160
298 * only check host_interrupt_operation_mode even if this is
299 * not related to host_interrupt_operation_mode.
300 *
301 * Enable the oscillator to count wake up time for L1 exit. This
302 * consumes slightly more power (100uA) - but allows to be sure
303 * that we wake up from L1 on time.
304 *
305 * This looks weird: read twice the same register, discard the
306 * value, set a bit, and yet again, read that same register
307 * just to discard the value. But that's the way the hardware
308 * seems to like it.
309 */
310 iwl_read_prph(trans, OSC_CLK);
311 iwl_read_prph(trans, OSC_CLK);
312 iwl_set_bits_prph(trans, OSC_CLK, OSC_CLK_FORCE_CONTROL);
313 iwl_read_prph(trans, OSC_CLK);
314 iwl_read_prph(trans, OSC_CLK);
315 }
316
317 /*
318 * Enable DMA clock and wait for it to stabilize.
319 *
320 * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0"
321 * bits do not disable clocks. This preserves any hardware
322 * bits already set by default in "CLK_CTRL_REG" after reset.
323 */
324 if (!trans->cfg->apmg_not_supported) {
325 iwl_write_prph(trans, APMG_CLK_EN_REG,
326 APMG_CLK_VAL_DMA_CLK_RQT);
327 udelay(20);
328
329 /* Disable L1-Active */
330 iwl_set_bits_prph(trans, APMG_PCIDEV_STT_REG,
331 APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
332
333 /* Clear the interrupt in APMG if the NIC is in RFKILL */
334 iwl_write_prph(trans, APMG_RTC_INT_STT_REG,
335 APMG_RTC_INT_STT_RFKILL);
336 }
337
338 set_bit(STATUS_DEVICE_ENABLED, &trans->status);
339
340 out:
341 return ret;
342 }
343
344 /*
345 * Enable LP XTAL to avoid HW bug where device may consume much power if
346 * FW is not loaded after device reset. LP XTAL is disabled by default
347 * after device HW reset. Do it only if XTAL is fed by internal source.
348 * Configure device's "persistence" mode to avoid resetting XTAL again when
349 * SHRD_HW_RST occurs in S3.
350 */
351 static void iwl_pcie_apm_lp_xtal_enable(struct iwl_trans *trans)
352 {
353 int ret;
354 u32 apmg_gp1_reg;
355 u32 apmg_xtal_cfg_reg;
356 u32 dl_cfg_reg;
357
358 /* Force XTAL ON */
359 __iwl_trans_pcie_set_bit(trans, CSR_GP_CNTRL,
360 CSR_GP_CNTRL_REG_FLAG_XTAL_ON);
361
362 /* Reset entire device - do controller reset (results in SHRD_HW_RST) */
363 iwl_set_bit(trans, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
364
365 udelay(10);
366
367 /*
368 * Set "initialization complete" bit to move adapter from
369 * D0U* --> D0A* (powered-up active) state.
370 */
371 iwl_set_bit(trans, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
372
373 /*
374 * Wait for clock stabilization; once stabilized, access to
375 * device-internal resources is possible.
376 */
377 ret = iwl_poll_bit(trans, CSR_GP_CNTRL,
378 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
379 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
380 25000);
381 if (WARN_ON(ret < 0)) {
382 IWL_ERR(trans, "Access time out - failed to enable LP XTAL\n");
383 /* Release XTAL ON request */
384 __iwl_trans_pcie_clear_bit(trans, CSR_GP_CNTRL,
385 CSR_GP_CNTRL_REG_FLAG_XTAL_ON);
386 return;
387 }
388
389 /*
390 * Clear "disable persistence" to avoid LP XTAL resetting when
391 * SHRD_HW_RST is applied in S3.
392 */
393 iwl_clear_bits_prph(trans, APMG_PCIDEV_STT_REG,
394 APMG_PCIDEV_STT_VAL_PERSIST_DIS);
395
396 /*
397 * Force APMG XTAL to be active to prevent its disabling by HW
398 * caused by APMG idle state.
399 */
400 apmg_xtal_cfg_reg = iwl_trans_pcie_read_shr(trans,
401 SHR_APMG_XTAL_CFG_REG);
402 iwl_trans_pcie_write_shr(trans, SHR_APMG_XTAL_CFG_REG,
403 apmg_xtal_cfg_reg |
404 SHR_APMG_XTAL_CFG_XTAL_ON_REQ);
405
406 /*
407 * Reset entire device again - do controller reset (results in
408 * SHRD_HW_RST). Turn MAC off before proceeding.
409 */
410 iwl_set_bit(trans, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
411
412 udelay(10);
413
414 /* Enable LP XTAL by indirect access through CSR */
415 apmg_gp1_reg = iwl_trans_pcie_read_shr(trans, SHR_APMG_GP1_REG);
416 iwl_trans_pcie_write_shr(trans, SHR_APMG_GP1_REG, apmg_gp1_reg |
417 SHR_APMG_GP1_WF_XTAL_LP_EN |
418 SHR_APMG_GP1_CHICKEN_BIT_SELECT);
419
420 /* Clear delay line clock power up */
421 dl_cfg_reg = iwl_trans_pcie_read_shr(trans, SHR_APMG_DL_CFG_REG);
422 iwl_trans_pcie_write_shr(trans, SHR_APMG_DL_CFG_REG, dl_cfg_reg &
423 ~SHR_APMG_DL_CFG_DL_CLOCK_POWER_UP);
424
425 /*
426 * Enable persistence mode to avoid LP XTAL resetting when
427 * SHRD_HW_RST is applied in S3.
428 */
429 iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG,
430 CSR_HW_IF_CONFIG_REG_PERSIST_MODE);
431
432 /*
433 * Clear "initialization complete" bit to move adapter from
434 * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
435 */
436 iwl_clear_bit(trans, CSR_GP_CNTRL,
437 CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
438
439 /* Activates XTAL resources monitor */
440 __iwl_trans_pcie_set_bit(trans, CSR_MONITOR_CFG_REG,
441 CSR_MONITOR_XTAL_RESOURCES);
442
443 /* Release XTAL ON request */
444 __iwl_trans_pcie_clear_bit(trans, CSR_GP_CNTRL,
445 CSR_GP_CNTRL_REG_FLAG_XTAL_ON);
446 udelay(10);
447
448 /* Release APMG XTAL */
449 iwl_trans_pcie_write_shr(trans, SHR_APMG_XTAL_CFG_REG,
450 apmg_xtal_cfg_reg &
451 ~SHR_APMG_XTAL_CFG_XTAL_ON_REQ);
452 }
453
454 static int iwl_pcie_apm_stop_master(struct iwl_trans *trans)
455 {
456 int ret = 0;
457
458 /* stop device's busmaster DMA activity */
459 iwl_set_bit(trans, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
460
461 ret = iwl_poll_bit(trans, CSR_RESET,
462 CSR_RESET_REG_FLAG_MASTER_DISABLED,
463 CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
464 if (ret < 0)
465 IWL_WARN(trans, "Master Disable Timed Out, 100 usec\n");
466
467 IWL_DEBUG_INFO(trans, "stop master\n");
468
469 return ret;
470 }
471
472 static void iwl_pcie_apm_stop(struct iwl_trans *trans, bool op_mode_leave)
473 {
474 IWL_DEBUG_INFO(trans, "Stop card, put in low power state\n");
475
476 if (op_mode_leave) {
477 if (!test_bit(STATUS_DEVICE_ENABLED, &trans->status))
478 iwl_pcie_apm_init(trans);
479
480 /* inform ME that we are leaving */
481 if (trans->cfg->device_family == IWL_DEVICE_FAMILY_7000)
482 iwl_set_bits_prph(trans, APMG_PCIDEV_STT_REG,
483 APMG_PCIDEV_STT_VAL_WAKE_ME);
484 else if (trans->cfg->device_family == IWL_DEVICE_FAMILY_8000) {
485 iwl_set_bit(trans, CSR_DBG_LINK_PWR_MGMT_REG,
486 CSR_RESET_LINK_PWR_MGMT_DISABLED);
487 iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG,
488 CSR_HW_IF_CONFIG_REG_PREPARE |
489 CSR_HW_IF_CONFIG_REG_ENABLE_PME);
490 mdelay(1);
491 iwl_clear_bit(trans, CSR_DBG_LINK_PWR_MGMT_REG,
492 CSR_RESET_LINK_PWR_MGMT_DISABLED);
493 }
494 mdelay(5);
495 }
496
497 clear_bit(STATUS_DEVICE_ENABLED, &trans->status);
498
499 /* Stop device's DMA activity */
500 iwl_pcie_apm_stop_master(trans);
501
502 if (trans->cfg->lp_xtal_workaround) {
503 iwl_pcie_apm_lp_xtal_enable(trans);
504 return;
505 }
506
507 /* Reset the entire device */
508 iwl_set_bit(trans, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
509
510 udelay(10);
511
512 /*
513 * Clear "initialization complete" bit to move adapter from
514 * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
515 */
516 iwl_clear_bit(trans, CSR_GP_CNTRL,
517 CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
518 }
519
520 static int iwl_pcie_nic_init(struct iwl_trans *trans)
521 {
522 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
523
524 /* nic_init */
525 spin_lock(&trans_pcie->irq_lock);
526 iwl_pcie_apm_init(trans);
527
528 spin_unlock(&trans_pcie->irq_lock);
529
530 iwl_pcie_set_pwr(trans, false);
531
532 iwl_op_mode_nic_config(trans->op_mode);
533
534 /* Allocate the RX queue, or reset if it is already allocated */
535 iwl_pcie_rx_init(trans);
536
537 /* Allocate or reset and init all Tx and Command queues */
538 if (iwl_pcie_tx_init(trans))
539 return -ENOMEM;
540
541 if (trans->cfg->base_params->shadow_reg_enable) {
542 /* enable shadow regs in HW */
543 iwl_set_bit(trans, CSR_MAC_SHADOW_REG_CTRL, 0x800FFFFF);
544 IWL_DEBUG_INFO(trans, "Enabling shadow registers in device\n");
545 }
546
547 return 0;
548 }
549
550 #define HW_READY_TIMEOUT (50)
551
552 /* Note: returns poll_bit return value, which is >= 0 if success */
553 static int iwl_pcie_set_hw_ready(struct iwl_trans *trans)
554 {
555 int ret;
556
557 iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG,
558 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY);
559
560 /* See if we got it */
561 ret = iwl_poll_bit(trans, CSR_HW_IF_CONFIG_REG,
562 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
563 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
564 HW_READY_TIMEOUT);
565
566 if (ret >= 0)
567 iwl_set_bit(trans, CSR_MBOX_SET_REG, CSR_MBOX_SET_REG_OS_ALIVE);
568
569 IWL_DEBUG_INFO(trans, "hardware%s ready\n", ret < 0 ? " not" : "");
570 return ret;
571 }
572
573 /* Note: returns standard 0/-ERROR code */
574 static int iwl_pcie_prepare_card_hw(struct iwl_trans *trans)
575 {
576 int ret;
577 int t = 0;
578 int iter;
579
580 IWL_DEBUG_INFO(trans, "iwl_trans_prepare_card_hw enter\n");
581
582 ret = iwl_pcie_set_hw_ready(trans);
583 /* If the card is ready, exit 0 */
584 if (ret >= 0)
585 return 0;
586
587 iwl_set_bit(trans, CSR_DBG_LINK_PWR_MGMT_REG,
588 CSR_RESET_LINK_PWR_MGMT_DISABLED);
589 msleep(1);
590
591 for (iter = 0; iter < 10; iter++) {
592 /* If HW is not ready, prepare the conditions to check again */
593 iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG,
594 CSR_HW_IF_CONFIG_REG_PREPARE);
595
596 do {
597 ret = iwl_pcie_set_hw_ready(trans);
598 if (ret >= 0)
599 return 0;
600
601 usleep_range(200, 1000);
602 t += 200;
603 } while (t < 150000);
604 msleep(25);
605 }
606
607 IWL_ERR(trans, "Couldn't prepare the card\n");
608
609 return ret;
610 }
611
612 /*
613 * ucode
614 */
615 static int iwl_pcie_load_firmware_chunk(struct iwl_trans *trans, u32 dst_addr,
616 dma_addr_t phy_addr, u32 byte_cnt)
617 {
618 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
619 unsigned long flags;
620 int ret;
621
622 trans_pcie->ucode_write_complete = false;
623
624 if (!iwl_trans_grab_nic_access(trans, &flags))
625 return -EIO;
626
627 iwl_write32(trans, FH_TCSR_CHNL_TX_CONFIG_REG(FH_SRVC_CHNL),
628 FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_PAUSE);
629
630 iwl_write32(trans, FH_SRVC_CHNL_SRAM_ADDR_REG(FH_SRVC_CHNL),
631 dst_addr);
632
633 iwl_write32(trans, FH_TFDIB_CTRL0_REG(FH_SRVC_CHNL),
634 phy_addr & FH_MEM_TFDIB_DRAM_ADDR_LSB_MSK);
635
636 iwl_write32(trans, FH_TFDIB_CTRL1_REG(FH_SRVC_CHNL),
637 (iwl_get_dma_hi_addr(phy_addr)
638 << FH_MEM_TFDIB_REG1_ADDR_BITSHIFT) | byte_cnt);
639
640 iwl_write32(trans, FH_TCSR_CHNL_TX_BUF_STS_REG(FH_SRVC_CHNL),
641 BIT(FH_TCSR_CHNL_TX_BUF_STS_REG_POS_TB_NUM) |
642 BIT(FH_TCSR_CHNL_TX_BUF_STS_REG_POS_TB_IDX) |
643 FH_TCSR_CHNL_TX_BUF_STS_REG_VAL_TFDB_VALID);
644
645 iwl_write32(trans, FH_TCSR_CHNL_TX_CONFIG_REG(FH_SRVC_CHNL),
646 FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE |
647 FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_DISABLE |
648 FH_TCSR_TX_CONFIG_REG_VAL_CIRQ_HOST_ENDTFD);
649
650 iwl_trans_release_nic_access(trans, &flags);
651
652 ret = wait_event_timeout(trans_pcie->ucode_write_waitq,
653 trans_pcie->ucode_write_complete, 5 * HZ);
654 if (!ret) {
655 IWL_ERR(trans, "Failed to load firmware chunk!\n");
656 return -ETIMEDOUT;
657 }
658
659 return 0;
660 }
661
662 static int iwl_pcie_load_section(struct iwl_trans *trans, u8 section_num,
663 const struct fw_desc *section)
664 {
665 u8 *v_addr;
666 dma_addr_t p_addr;
667 u32 offset, chunk_sz = min_t(u32, FH_MEM_TB_MAX_LENGTH, section->len);
668 int ret = 0;
669
670 IWL_DEBUG_FW(trans, "[%d] uCode section being loaded...\n",
671 section_num);
672
673 v_addr = dma_alloc_coherent(trans->dev, chunk_sz, &p_addr,
674 GFP_KERNEL | __GFP_NOWARN);
675 if (!v_addr) {
676 IWL_DEBUG_INFO(trans, "Falling back to small chunks of DMA\n");
677 chunk_sz = PAGE_SIZE;
678 v_addr = dma_alloc_coherent(trans->dev, chunk_sz,
679 &p_addr, GFP_KERNEL);
680 if (!v_addr)
681 return -ENOMEM;
682 }
683
684 for (offset = 0; offset < section->len; offset += chunk_sz) {
685 u32 copy_size, dst_addr;
686 bool extended_addr = false;
687
688 copy_size = min_t(u32, chunk_sz, section->len - offset);
689 dst_addr = section->offset + offset;
690
691 if (dst_addr >= IWL_FW_MEM_EXTENDED_START &&
692 dst_addr <= IWL_FW_MEM_EXTENDED_END)
693 extended_addr = true;
694
695 if (extended_addr)
696 iwl_set_bits_prph(trans, LMPM_CHICK,
697 LMPM_CHICK_EXTENDED_ADDR_SPACE);
698
699 memcpy(v_addr, (u8 *)section->data + offset, copy_size);
700 ret = iwl_pcie_load_firmware_chunk(trans, dst_addr, p_addr,
701 copy_size);
702
703 if (extended_addr)
704 iwl_clear_bits_prph(trans, LMPM_CHICK,
705 LMPM_CHICK_EXTENDED_ADDR_SPACE);
706
707 if (ret) {
708 IWL_ERR(trans,
709 "Could not load the [%d] uCode section\n",
710 section_num);
711 break;
712 }
713 }
714
715 dma_free_coherent(trans->dev, chunk_sz, v_addr, p_addr);
716 return ret;
717 }
718
719 /*
720 * Driver Takes the ownership on secure machine before FW load
721 * and prevent race with the BT load.
722 * W/A for ROM bug. (should be remove in the next Si step)
723 */
724 static int iwl_pcie_rsa_race_bug_wa(struct iwl_trans *trans)
725 {
726 u32 val, loop = 1000;
727
728 /*
729 * Check the RSA semaphore is accessible.
730 * If the HW isn't locked and the rsa semaphore isn't accessible,
731 * we are in trouble.
732 */
733 val = iwl_read_prph(trans, PREG_AUX_BUS_WPROT_0);
734 if (val & (BIT(1) | BIT(17))) {
735 IWL_INFO(trans,
736 "can't access the RSA semaphore it is write protected\n");
737 return 0;
738 }
739
740 /* take ownership on the AUX IF */
741 iwl_write_prph(trans, WFPM_CTRL_REG, WFPM_AUX_CTL_AUX_IF_MAC_OWNER_MSK);
742 iwl_write_prph(trans, AUX_MISC_MASTER1_EN, AUX_MISC_MASTER1_EN_SBE_MSK);
743
744 do {
745 iwl_write_prph(trans, AUX_MISC_MASTER1_SMPHR_STATUS, 0x1);
746 val = iwl_read_prph(trans, AUX_MISC_MASTER1_SMPHR_STATUS);
747 if (val == 0x1) {
748 iwl_write_prph(trans, RSA_ENABLE, 0);
749 return 0;
750 }
751
752 udelay(10);
753 loop--;
754 } while (loop > 0);
755
756 IWL_ERR(trans, "Failed to take ownership on secure machine\n");
757 return -EIO;
758 }
759
760 static int iwl_pcie_load_cpu_sections_8000(struct iwl_trans *trans,
761 const struct fw_img *image,
762 int cpu,
763 int *first_ucode_section)
764 {
765 int shift_param;
766 int i, ret = 0, sec_num = 0x1;
767 u32 val, last_read_idx = 0;
768
769 if (cpu == 1) {
770 shift_param = 0;
771 *first_ucode_section = 0;
772 } else {
773 shift_param = 16;
774 (*first_ucode_section)++;
775 }
776
777 for (i = *first_ucode_section; i < IWL_UCODE_SECTION_MAX; i++) {
778 last_read_idx = i;
779
780 /*
781 * CPU1_CPU2_SEPARATOR_SECTION delimiter - separate between
782 * CPU1 to CPU2.
783 * PAGING_SEPARATOR_SECTION delimiter - separate between
784 * CPU2 non paged to CPU2 paging sec.
785 */
786 if (!image->sec[i].data ||
787 image->sec[i].offset == CPU1_CPU2_SEPARATOR_SECTION ||
788 image->sec[i].offset == PAGING_SEPARATOR_SECTION) {
789 IWL_DEBUG_FW(trans,
790 "Break since Data not valid or Empty section, sec = %d\n",
791 i);
792 break;
793 }
794
795 ret = iwl_pcie_load_section(trans, i, &image->sec[i]);
796 if (ret)
797 return ret;
798
799 /* Notify the ucode of the loaded section number and status */
800 val = iwl_read_direct32(trans, FH_UCODE_LOAD_STATUS);
801 val = val | (sec_num << shift_param);
802 iwl_write_direct32(trans, FH_UCODE_LOAD_STATUS, val);
803 sec_num = (sec_num << 1) | 0x1;
804 }
805
806 *first_ucode_section = last_read_idx;
807
808 if (cpu == 1)
809 iwl_write_direct32(trans, FH_UCODE_LOAD_STATUS, 0xFFFF);
810 else
811 iwl_write_direct32(trans, FH_UCODE_LOAD_STATUS, 0xFFFFFFFF);
812
813 return 0;
814 }
815
816 static int iwl_pcie_load_cpu_sections(struct iwl_trans *trans,
817 const struct fw_img *image,
818 int cpu,
819 int *first_ucode_section)
820 {
821 int shift_param;
822 int i, ret = 0;
823 u32 last_read_idx = 0;
824
825 if (cpu == 1) {
826 shift_param = 0;
827 *first_ucode_section = 0;
828 } else {
829 shift_param = 16;
830 (*first_ucode_section)++;
831 }
832
833 for (i = *first_ucode_section; i < IWL_UCODE_SECTION_MAX; i++) {
834 last_read_idx = i;
835
836 /*
837 * CPU1_CPU2_SEPARATOR_SECTION delimiter - separate between
838 * CPU1 to CPU2.
839 * PAGING_SEPARATOR_SECTION delimiter - separate between
840 * CPU2 non paged to CPU2 paging sec.
841 */
842 if (!image->sec[i].data ||
843 image->sec[i].offset == CPU1_CPU2_SEPARATOR_SECTION ||
844 image->sec[i].offset == PAGING_SEPARATOR_SECTION) {
845 IWL_DEBUG_FW(trans,
846 "Break since Data not valid or Empty section, sec = %d\n",
847 i);
848 break;
849 }
850
851 ret = iwl_pcie_load_section(trans, i, &image->sec[i]);
852 if (ret)
853 return ret;
854 }
855
856 if (trans->cfg->device_family == IWL_DEVICE_FAMILY_8000)
857 iwl_set_bits_prph(trans,
858 CSR_UCODE_LOAD_STATUS_ADDR,
859 (LMPM_CPU_UCODE_LOADING_COMPLETED |
860 LMPM_CPU_HDRS_LOADING_COMPLETED |
861 LMPM_CPU_UCODE_LOADING_STARTED) <<
862 shift_param);
863
864 *first_ucode_section = last_read_idx;
865
866 return 0;
867 }
868
869 static void iwl_pcie_apply_destination(struct iwl_trans *trans)
870 {
871 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
872 const struct iwl_fw_dbg_dest_tlv *dest = trans->dbg_dest_tlv;
873 int i;
874
875 if (dest->version)
876 IWL_ERR(trans,
877 "DBG DEST version is %d - expect issues\n",
878 dest->version);
879
880 IWL_INFO(trans, "Applying debug destination %s\n",
881 get_fw_dbg_mode_string(dest->monitor_mode));
882
883 if (dest->monitor_mode == EXTERNAL_MODE)
884 iwl_pcie_alloc_fw_monitor(trans, dest->size_power);
885 else
886 IWL_WARN(trans, "PCI should have external buffer debug\n");
887
888 for (i = 0; i < trans->dbg_dest_reg_num; i++) {
889 u32 addr = le32_to_cpu(dest->reg_ops[i].addr);
890 u32 val = le32_to_cpu(dest->reg_ops[i].val);
891
892 switch (dest->reg_ops[i].op) {
893 case CSR_ASSIGN:
894 iwl_write32(trans, addr, val);
895 break;
896 case CSR_SETBIT:
897 iwl_set_bit(trans, addr, BIT(val));
898 break;
899 case CSR_CLEARBIT:
900 iwl_clear_bit(trans, addr, BIT(val));
901 break;
902 case PRPH_ASSIGN:
903 iwl_write_prph(trans, addr, val);
904 break;
905 case PRPH_SETBIT:
906 iwl_set_bits_prph(trans, addr, BIT(val));
907 break;
908 case PRPH_CLEARBIT:
909 iwl_clear_bits_prph(trans, addr, BIT(val));
910 break;
911 case PRPH_BLOCKBIT:
912 if (iwl_read_prph(trans, addr) & BIT(val)) {
913 IWL_ERR(trans,
914 "BIT(%u) in address 0x%x is 1, stopping FW configuration\n",
915 val, addr);
916 goto monitor;
917 }
918 break;
919 default:
920 IWL_ERR(trans, "FW debug - unknown OP %d\n",
921 dest->reg_ops[i].op);
922 break;
923 }
924 }
925
926 monitor:
927 if (dest->monitor_mode == EXTERNAL_MODE && trans_pcie->fw_mon_size) {
928 iwl_write_prph(trans, le32_to_cpu(dest->base_reg),
929 trans_pcie->fw_mon_phys >> dest->base_shift);
930 if (trans->cfg->device_family == IWL_DEVICE_FAMILY_8000)
931 iwl_write_prph(trans, le32_to_cpu(dest->end_reg),
932 (trans_pcie->fw_mon_phys +
933 trans_pcie->fw_mon_size - 256) >>
934 dest->end_shift);
935 else
936 iwl_write_prph(trans, le32_to_cpu(dest->end_reg),
937 (trans_pcie->fw_mon_phys +
938 trans_pcie->fw_mon_size) >>
939 dest->end_shift);
940 }
941 }
942
943 static int iwl_pcie_load_given_ucode(struct iwl_trans *trans,
944 const struct fw_img *image)
945 {
946 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
947 int ret = 0;
948 int first_ucode_section;
949
950 IWL_DEBUG_FW(trans, "working with %s CPU\n",
951 image->is_dual_cpus ? "Dual" : "Single");
952
953 /* load to FW the binary non secured sections of CPU1 */
954 ret = iwl_pcie_load_cpu_sections(trans, image, 1, &first_ucode_section);
955 if (ret)
956 return ret;
957
958 if (image->is_dual_cpus) {
959 /* set CPU2 header address */
960 iwl_write_prph(trans,
961 LMPM_SECURE_UCODE_LOAD_CPU2_HDR_ADDR,
962 LMPM_SECURE_CPU2_HDR_MEM_SPACE);
963
964 /* load to FW the binary sections of CPU2 */
965 ret = iwl_pcie_load_cpu_sections(trans, image, 2,
966 &first_ucode_section);
967 if (ret)
968 return ret;
969 }
970
971 /* supported for 7000 only for the moment */
972 if (iwlwifi_mod_params.fw_monitor &&
973 trans->cfg->device_family == IWL_DEVICE_FAMILY_7000) {
974 iwl_pcie_alloc_fw_monitor(trans, 0);
975
976 if (trans_pcie->fw_mon_size) {
977 iwl_write_prph(trans, MON_BUFF_BASE_ADDR,
978 trans_pcie->fw_mon_phys >> 4);
979 iwl_write_prph(trans, MON_BUFF_END_ADDR,
980 (trans_pcie->fw_mon_phys +
981 trans_pcie->fw_mon_size) >> 4);
982 }
983 } else if (trans->dbg_dest_tlv) {
984 iwl_pcie_apply_destination(trans);
985 }
986
987 /* release CPU reset */
988 iwl_write32(trans, CSR_RESET, 0);
989
990 return 0;
991 }
992
993 static int iwl_pcie_load_given_ucode_8000(struct iwl_trans *trans,
994 const struct fw_img *image)
995 {
996 int ret = 0;
997 int first_ucode_section;
998
999 IWL_DEBUG_FW(trans, "working with %s CPU\n",
1000 image->is_dual_cpus ? "Dual" : "Single");
1001
1002 if (trans->dbg_dest_tlv)
1003 iwl_pcie_apply_destination(trans);
1004
1005 /* TODO: remove in the next Si step */
1006 ret = iwl_pcie_rsa_race_bug_wa(trans);
1007 if (ret)
1008 return ret;
1009
1010 /* configure the ucode to be ready to get the secured image */
1011 /* release CPU reset */
1012 iwl_write_prph(trans, RELEASE_CPU_RESET, RELEASE_CPU_RESET_BIT);
1013
1014 /* load to FW the binary Secured sections of CPU1 */
1015 ret = iwl_pcie_load_cpu_sections_8000(trans, image, 1,
1016 &first_ucode_section);
1017 if (ret)
1018 return ret;
1019
1020 /* load to FW the binary sections of CPU2 */
1021 return iwl_pcie_load_cpu_sections_8000(trans, image, 2,
1022 &first_ucode_section);
1023 }
1024
1025 static void _iwl_trans_pcie_stop_device(struct iwl_trans *trans, bool low_power)
1026 {
1027 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1028 bool hw_rfkill, was_hw_rfkill;
1029
1030 lockdep_assert_held(&trans_pcie->mutex);
1031
1032 if (trans_pcie->is_down)
1033 return;
1034
1035 trans_pcie->is_down = true;
1036
1037 was_hw_rfkill = iwl_is_rfkill_set(trans);
1038
1039 /* tell the device to stop sending interrupts */
1040 spin_lock(&trans_pcie->irq_lock);
1041 iwl_disable_interrupts(trans);
1042 spin_unlock(&trans_pcie->irq_lock);
1043
1044 /* device going down, Stop using ICT table */
1045 iwl_pcie_disable_ict(trans);
1046
1047 /*
1048 * If a HW restart happens during firmware loading,
1049 * then the firmware loading might call this function
1050 * and later it might be called again due to the
1051 * restart. So don't process again if the device is
1052 * already dead.
1053 */
1054 if (test_and_clear_bit(STATUS_DEVICE_ENABLED, &trans->status)) {
1055 IWL_DEBUG_INFO(trans,
1056 "DEVICE_ENABLED bit was set and is now cleared\n");
1057 iwl_pcie_tx_stop(trans);
1058 iwl_pcie_rx_stop(trans);
1059
1060 /* Power-down device's busmaster DMA clocks */
1061 if (!trans->cfg->apmg_not_supported) {
1062 iwl_write_prph(trans, APMG_CLK_DIS_REG,
1063 APMG_CLK_VAL_DMA_CLK_RQT);
1064 udelay(5);
1065 }
1066 }
1067
1068 /* Make sure (redundant) we've released our request to stay awake */
1069 iwl_clear_bit(trans, CSR_GP_CNTRL,
1070 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
1071
1072 /* Stop the device, and put it in low power state */
1073 iwl_pcie_apm_stop(trans, false);
1074
1075 /* stop and reset the on-board processor */
1076 iwl_write32(trans, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
1077 udelay(20);
1078
1079 /*
1080 * Upon stop, the APM issues an interrupt if HW RF kill is set.
1081 * This is a bug in certain verions of the hardware.
1082 * Certain devices also keep sending HW RF kill interrupt all
1083 * the time, unless the interrupt is ACKed even if the interrupt
1084 * should be masked. Re-ACK all the interrupts here.
1085 */
1086 spin_lock(&trans_pcie->irq_lock);
1087 iwl_disable_interrupts(trans);
1088 spin_unlock(&trans_pcie->irq_lock);
1089
1090 /* clear all status bits */
1091 clear_bit(STATUS_SYNC_HCMD_ACTIVE, &trans->status);
1092 clear_bit(STATUS_INT_ENABLED, &trans->status);
1093 clear_bit(STATUS_TPOWER_PMI, &trans->status);
1094 clear_bit(STATUS_RFKILL, &trans->status);
1095
1096 /*
1097 * Even if we stop the HW, we still want the RF kill
1098 * interrupt
1099 */
1100 iwl_enable_rfkill_int(trans);
1101
1102 /*
1103 * Check again since the RF kill state may have changed while
1104 * all the interrupts were disabled, in this case we couldn't
1105 * receive the RF kill interrupt and update the state in the
1106 * op_mode.
1107 * Don't call the op_mode if the rkfill state hasn't changed.
1108 * This allows the op_mode to call stop_device from the rfkill
1109 * notification without endless recursion. Under very rare
1110 * circumstances, we might have a small recursion if the rfkill
1111 * state changed exactly now while we were called from stop_device.
1112 * This is very unlikely but can happen and is supported.
1113 */
1114 hw_rfkill = iwl_is_rfkill_set(trans);
1115 if (hw_rfkill)
1116 set_bit(STATUS_RFKILL, &trans->status);
1117 else
1118 clear_bit(STATUS_RFKILL, &trans->status);
1119 if (hw_rfkill != was_hw_rfkill)
1120 iwl_trans_pcie_rf_kill(trans, hw_rfkill);
1121
1122 /* re-take ownership to prevent other users from stealing the device */
1123 iwl_pcie_prepare_card_hw(trans);
1124 }
1125
1126 static void iwl_pcie_synchronize_irqs(struct iwl_trans *trans)
1127 {
1128 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1129
1130 if (trans_pcie->msix_enabled) {
1131 int i;
1132
1133 for (i = 0; i < trans_pcie->allocated_vector; i++)
1134 synchronize_irq(trans_pcie->msix_entries[i].vector);
1135 } else {
1136 synchronize_irq(trans_pcie->pci_dev->irq);
1137 }
1138 }
1139
1140 static int iwl_trans_pcie_start_fw(struct iwl_trans *trans,
1141 const struct fw_img *fw, bool run_in_rfkill)
1142 {
1143 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1144 bool hw_rfkill;
1145 int ret;
1146
1147 /* This may fail if AMT took ownership of the device */
1148 if (iwl_pcie_prepare_card_hw(trans)) {
1149 IWL_WARN(trans, "Exit HW not ready\n");
1150 ret = -EIO;
1151 goto out;
1152 }
1153
1154 iwl_enable_rfkill_int(trans);
1155
1156 iwl_write32(trans, CSR_INT, 0xFFFFFFFF);
1157
1158 /*
1159 * We enabled the RF-Kill interrupt and the handler may very
1160 * well be running. Disable the interrupts to make sure no other
1161 * interrupt can be fired.
1162 */
1163 iwl_disable_interrupts(trans);
1164
1165 /* Make sure it finished running */
1166 iwl_pcie_synchronize_irqs(trans);
1167
1168 mutex_lock(&trans_pcie->mutex);
1169
1170 /* If platform's RF_KILL switch is NOT set to KILL */
1171 hw_rfkill = iwl_is_rfkill_set(trans);
1172 if (hw_rfkill)
1173 set_bit(STATUS_RFKILL, &trans->status);
1174 else
1175 clear_bit(STATUS_RFKILL, &trans->status);
1176 iwl_trans_pcie_rf_kill(trans, hw_rfkill);
1177 if (hw_rfkill && !run_in_rfkill) {
1178 ret = -ERFKILL;
1179 goto out;
1180 }
1181
1182 /* Someone called stop_device, don't try to start_fw */
1183 if (trans_pcie->is_down) {
1184 IWL_WARN(trans,
1185 "Can't start_fw since the HW hasn't been started\n");
1186 ret = -EIO;
1187 goto out;
1188 }
1189
1190 /* make sure rfkill handshake bits are cleared */
1191 iwl_write32(trans, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1192 iwl_write32(trans, CSR_UCODE_DRV_GP1_CLR,
1193 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
1194
1195 /* clear (again), then enable host interrupts */
1196 iwl_write32(trans, CSR_INT, 0xFFFFFFFF);
1197
1198 ret = iwl_pcie_nic_init(trans);
1199 if (ret) {
1200 IWL_ERR(trans, "Unable to init nic\n");
1201 goto out;
1202 }
1203
1204 /*
1205 * Now, we load the firmware and don't want to be interrupted, even
1206 * by the RF-Kill interrupt (hence mask all the interrupt besides the
1207 * FH_TX interrupt which is needed to load the firmware). If the
1208 * RF-Kill switch is toggled, we will find out after having loaded
1209 * the firmware and return the proper value to the caller.
1210 */
1211 iwl_enable_fw_load_int(trans);
1212
1213 /* really make sure rfkill handshake bits are cleared */
1214 iwl_write32(trans, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1215 iwl_write32(trans, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1216
1217 /* Load the given image to the HW */
1218 if (trans->cfg->device_family == IWL_DEVICE_FAMILY_8000)
1219 ret = iwl_pcie_load_given_ucode_8000(trans, fw);
1220 else
1221 ret = iwl_pcie_load_given_ucode(trans, fw);
1222 iwl_enable_interrupts(trans);
1223
1224 /* re-check RF-Kill state since we may have missed the interrupt */
1225 hw_rfkill = iwl_is_rfkill_set(trans);
1226 if (hw_rfkill)
1227 set_bit(STATUS_RFKILL, &trans->status);
1228 else
1229 clear_bit(STATUS_RFKILL, &trans->status);
1230
1231 iwl_trans_pcie_rf_kill(trans, hw_rfkill);
1232 if (hw_rfkill && !run_in_rfkill)
1233 ret = -ERFKILL;
1234
1235 out:
1236 mutex_unlock(&trans_pcie->mutex);
1237 return ret;
1238 }
1239
1240 static void iwl_trans_pcie_fw_alive(struct iwl_trans *trans, u32 scd_addr)
1241 {
1242 iwl_pcie_reset_ict(trans);
1243 iwl_pcie_tx_start(trans, scd_addr);
1244 }
1245
1246 static void iwl_trans_pcie_stop_device(struct iwl_trans *trans, bool low_power)
1247 {
1248 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1249
1250 mutex_lock(&trans_pcie->mutex);
1251 _iwl_trans_pcie_stop_device(trans, low_power);
1252 mutex_unlock(&trans_pcie->mutex);
1253 }
1254
1255 void iwl_trans_pcie_rf_kill(struct iwl_trans *trans, bool state)
1256 {
1257 struct iwl_trans_pcie __maybe_unused *trans_pcie =
1258 IWL_TRANS_GET_PCIE_TRANS(trans);
1259
1260 lockdep_assert_held(&trans_pcie->mutex);
1261
1262 if (iwl_op_mode_hw_rf_kill(trans->op_mode, state))
1263 _iwl_trans_pcie_stop_device(trans, true);
1264 }
1265
1266 static void iwl_trans_pcie_d3_suspend(struct iwl_trans *trans, bool test,
1267 bool reset)
1268 {
1269 if (!reset) {
1270 /* Enable persistence mode to avoid reset */
1271 iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG,
1272 CSR_HW_IF_CONFIG_REG_PERSIST_MODE);
1273 }
1274
1275 iwl_disable_interrupts(trans);
1276
1277 /*
1278 * in testing mode, the host stays awake and the
1279 * hardware won't be reset (not even partially)
1280 */
1281 if (test)
1282 return;
1283
1284 iwl_pcie_disable_ict(trans);
1285
1286 iwl_pcie_synchronize_irqs(trans);
1287
1288 iwl_clear_bit(trans, CSR_GP_CNTRL,
1289 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
1290 iwl_clear_bit(trans, CSR_GP_CNTRL,
1291 CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1292
1293 if (reset) {
1294 /*
1295 * reset TX queues -- some of their registers reset during S3
1296 * so if we don't reset everything here the D3 image would try
1297 * to execute some invalid memory upon resume
1298 */
1299 iwl_trans_pcie_tx_reset(trans);
1300 }
1301
1302 iwl_pcie_set_pwr(trans, true);
1303 }
1304
1305 static int iwl_trans_pcie_d3_resume(struct iwl_trans *trans,
1306 enum iwl_d3_status *status,
1307 bool test, bool reset)
1308 {
1309 u32 val;
1310 int ret;
1311
1312 if (test) {
1313 iwl_enable_interrupts(trans);
1314 *status = IWL_D3_STATUS_ALIVE;
1315 return 0;
1316 }
1317
1318 /*
1319 * Also enables interrupts - none will happen as the device doesn't
1320 * know we're waking it up, only when the opmode actually tells it
1321 * after this call.
1322 */
1323 iwl_pcie_reset_ict(trans);
1324
1325 iwl_set_bit(trans, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
1326 iwl_set_bit(trans, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1327
1328 if (trans->cfg->device_family == IWL_DEVICE_FAMILY_8000)
1329 udelay(2);
1330
1331 ret = iwl_poll_bit(trans, CSR_GP_CNTRL,
1332 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
1333 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
1334 25000);
1335 if (ret < 0) {
1336 IWL_ERR(trans, "Failed to resume the device (mac ready)\n");
1337 return ret;
1338 }
1339
1340 iwl_pcie_set_pwr(trans, false);
1341
1342 if (!reset) {
1343 iwl_clear_bit(trans, CSR_GP_CNTRL,
1344 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
1345 } else {
1346 iwl_trans_pcie_tx_reset(trans);
1347
1348 ret = iwl_pcie_rx_init(trans);
1349 if (ret) {
1350 IWL_ERR(trans,
1351 "Failed to resume the device (RX reset)\n");
1352 return ret;
1353 }
1354 }
1355
1356 val = iwl_read32(trans, CSR_RESET);
1357 if (val & CSR_RESET_REG_FLAG_NEVO_RESET)
1358 *status = IWL_D3_STATUS_RESET;
1359 else
1360 *status = IWL_D3_STATUS_ALIVE;
1361
1362 return 0;
1363 }
1364
1365 struct iwl_causes_list {
1366 u32 cause_num;
1367 u32 mask_reg;
1368 u8 addr;
1369 };
1370
1371 static struct iwl_causes_list causes_list[] = {
1372 {MSIX_FH_INT_CAUSES_D2S_CH0_NUM, CSR_MSIX_FH_INT_MASK_AD, 0},
1373 {MSIX_FH_INT_CAUSES_D2S_CH1_NUM, CSR_MSIX_FH_INT_MASK_AD, 0x1},
1374 {MSIX_FH_INT_CAUSES_S2D, CSR_MSIX_FH_INT_MASK_AD, 0x3},
1375 {MSIX_FH_INT_CAUSES_FH_ERR, CSR_MSIX_FH_INT_MASK_AD, 0x5},
1376 {MSIX_HW_INT_CAUSES_REG_ALIVE, CSR_MSIX_HW_INT_MASK_AD, 0x10},
1377 {MSIX_HW_INT_CAUSES_REG_WAKEUP, CSR_MSIX_HW_INT_MASK_AD, 0x11},
1378 {MSIX_HW_INT_CAUSES_REG_CT_KILL, CSR_MSIX_HW_INT_MASK_AD, 0x16},
1379 {MSIX_HW_INT_CAUSES_REG_RF_KILL, CSR_MSIX_HW_INT_MASK_AD, 0x17},
1380 {MSIX_HW_INT_CAUSES_REG_PERIODIC, CSR_MSIX_HW_INT_MASK_AD, 0x18},
1381 {MSIX_HW_INT_CAUSES_REG_SW_ERR, CSR_MSIX_HW_INT_MASK_AD, 0x29},
1382 {MSIX_HW_INT_CAUSES_REG_SCD, CSR_MSIX_HW_INT_MASK_AD, 0x2A},
1383 {MSIX_HW_INT_CAUSES_REG_FH_TX, CSR_MSIX_HW_INT_MASK_AD, 0x2B},
1384 {MSIX_HW_INT_CAUSES_REG_HW_ERR, CSR_MSIX_HW_INT_MASK_AD, 0x2D},
1385 {MSIX_HW_INT_CAUSES_REG_HAP, CSR_MSIX_HW_INT_MASK_AD, 0x2E},
1386 };
1387
1388 static void iwl_pcie_init_msix(struct iwl_trans_pcie *trans_pcie)
1389 {
1390 u32 val, max_rx_vector, i;
1391 struct iwl_trans *trans = trans_pcie->trans;
1392
1393 max_rx_vector = trans_pcie->allocated_vector - 1;
1394
1395 if (!trans_pcie->msix_enabled)
1396 return;
1397
1398 iwl_write_prph(trans, UREG_CHICK, UREG_CHICK_MSIX_ENABLE);
1399
1400 /*
1401 * Each cause from the list above and the RX causes is represented as
1402 * a byte in the IVAR table. We access the first (N - 1) bytes and map
1403 * them to the (N - 1) vectors so these vectors will be used as rx
1404 * vectors. Then access all non rx causes and map them to the
1405 * default queue (N'th queue).
1406 */
1407 for (i = 0; i < max_rx_vector; i++) {
1408 iwl_write8(trans, CSR_MSIX_RX_IVAR(i), MSIX_FH_INT_CAUSES_Q(i));
1409 iwl_clear_bit(trans, CSR_MSIX_FH_INT_MASK_AD,
1410 BIT(MSIX_FH_INT_CAUSES_Q(i)));
1411 }
1412
1413 for (i = 0; i < ARRAY_SIZE(causes_list); i++) {
1414 val = trans_pcie->default_irq_num |
1415 MSIX_NON_AUTO_CLEAR_CAUSE;
1416 iwl_write8(trans, CSR_MSIX_IVAR(causes_list[i].addr), val);
1417 iwl_clear_bit(trans, causes_list[i].mask_reg,
1418 causes_list[i].cause_num);
1419 }
1420 trans_pcie->fh_init_mask =
1421 ~iwl_read32(trans, CSR_MSIX_FH_INT_MASK_AD);
1422 trans_pcie->fh_mask = trans_pcie->fh_init_mask;
1423 trans_pcie->hw_init_mask =
1424 ~iwl_read32(trans, CSR_MSIX_HW_INT_MASK_AD);
1425 trans_pcie->hw_mask = trans_pcie->hw_init_mask;
1426 }
1427
1428 static void iwl_pcie_set_interrupt_capa(struct pci_dev *pdev,
1429 struct iwl_trans *trans)
1430 {
1431 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1432 u16 pci_cmd;
1433 int max_vector;
1434 int ret, i;
1435
1436 if (trans->cfg->mq_rx_supported) {
1437 max_vector = min_t(u32, (num_possible_cpus() + 1),
1438 IWL_MAX_RX_HW_QUEUES);
1439 for (i = 0; i < max_vector; i++)
1440 trans_pcie->msix_entries[i].entry = i;
1441
1442 ret = pci_enable_msix_range(pdev, trans_pcie->msix_entries,
1443 MSIX_MIN_INTERRUPT_VECTORS,
1444 max_vector);
1445 if (ret > 1) {
1446 IWL_DEBUG_INFO(trans,
1447 "Enable MSI-X allocate %d interrupt vector\n",
1448 ret);
1449 trans_pcie->allocated_vector = ret;
1450 trans_pcie->default_irq_num =
1451 trans_pcie->allocated_vector - 1;
1452 trans_pcie->trans->num_rx_queues =
1453 trans_pcie->allocated_vector - 1;
1454 trans_pcie->msix_enabled = true;
1455
1456 return;
1457 }
1458 IWL_DEBUG_INFO(trans,
1459 "ret = %d %s move to msi mode\n", ret,
1460 (ret == 1) ?
1461 "can't allocate more than 1 interrupt vector" :
1462 "failed to enable msi-x mode");
1463 pci_disable_msix(pdev);
1464 }
1465
1466 ret = pci_enable_msi(pdev);
1467 if (ret) {
1468 dev_err(&pdev->dev, "pci_enable_msi failed(0X%x)\n", ret);
1469 /* enable rfkill interrupt: hw bug w/a */
1470 pci_read_config_word(pdev, PCI_COMMAND, &pci_cmd);
1471 if (pci_cmd & PCI_COMMAND_INTX_DISABLE) {
1472 pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
1473 pci_write_config_word(pdev, PCI_COMMAND, pci_cmd);
1474 }
1475 }
1476 }
1477
1478 static int iwl_pcie_init_msix_handler(struct pci_dev *pdev,
1479 struct iwl_trans_pcie *trans_pcie)
1480 {
1481 int i, last_vector;
1482
1483 last_vector = trans_pcie->trans->num_rx_queues;
1484
1485 for (i = 0; i < trans_pcie->allocated_vector; i++) {
1486 int ret;
1487
1488 ret = request_threaded_irq(trans_pcie->msix_entries[i].vector,
1489 iwl_pcie_msix_isr,
1490 (i == last_vector) ?
1491 iwl_pcie_irq_msix_handler :
1492 iwl_pcie_irq_rx_msix_handler,
1493 IRQF_SHARED,
1494 DRV_NAME,
1495 &trans_pcie->msix_entries[i]);
1496 if (ret) {
1497 int j;
1498
1499 IWL_ERR(trans_pcie->trans,
1500 "Error allocating IRQ %d\n", i);
1501 for (j = 0; j < i; j++)
1502 free_irq(trans_pcie->msix_entries[i].vector,
1503 &trans_pcie->msix_entries[i]);
1504 pci_disable_msix(pdev);
1505 return ret;
1506 }
1507 }
1508
1509 return 0;
1510 }
1511
1512 static int _iwl_trans_pcie_start_hw(struct iwl_trans *trans, bool low_power)
1513 {
1514 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1515 bool hw_rfkill;
1516 int err;
1517
1518 lockdep_assert_held(&trans_pcie->mutex);
1519
1520 err = iwl_pcie_prepare_card_hw(trans);
1521 if (err) {
1522 IWL_ERR(trans, "Error while preparing HW: %d\n", err);
1523 return err;
1524 }
1525
1526 /* Reset the entire device */
1527 iwl_write32(trans, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
1528
1529 usleep_range(10, 15);
1530
1531 iwl_pcie_apm_init(trans);
1532
1533 iwl_pcie_init_msix(trans_pcie);
1534 /* From now on, the op_mode will be kept updated about RF kill state */
1535 iwl_enable_rfkill_int(trans);
1536
1537 /* Set is_down to false here so that...*/
1538 trans_pcie->is_down = false;
1539
1540 hw_rfkill = iwl_is_rfkill_set(trans);
1541 if (hw_rfkill)
1542 set_bit(STATUS_RFKILL, &trans->status);
1543 else
1544 clear_bit(STATUS_RFKILL, &trans->status);
1545 /* ... rfkill can call stop_device and set it false if needed */
1546 iwl_trans_pcie_rf_kill(trans, hw_rfkill);
1547
1548 /* Make sure we sync here, because we'll need full access later */
1549 if (low_power)
1550 pm_runtime_resume(trans->dev);
1551
1552 return 0;
1553 }
1554
1555 static int iwl_trans_pcie_start_hw(struct iwl_trans *trans, bool low_power)
1556 {
1557 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1558 int ret;
1559
1560 mutex_lock(&trans_pcie->mutex);
1561 ret = _iwl_trans_pcie_start_hw(trans, low_power);
1562 mutex_unlock(&trans_pcie->mutex);
1563
1564 return ret;
1565 }
1566
1567 static void iwl_trans_pcie_op_mode_leave(struct iwl_trans *trans)
1568 {
1569 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1570
1571 mutex_lock(&trans_pcie->mutex);
1572
1573 /* disable interrupts - don't enable HW RF kill interrupt */
1574 spin_lock(&trans_pcie->irq_lock);
1575 iwl_disable_interrupts(trans);
1576 spin_unlock(&trans_pcie->irq_lock);
1577
1578 iwl_pcie_apm_stop(trans, true);
1579
1580 spin_lock(&trans_pcie->irq_lock);
1581 iwl_disable_interrupts(trans);
1582 spin_unlock(&trans_pcie->irq_lock);
1583
1584 iwl_pcie_disable_ict(trans);
1585
1586 mutex_unlock(&trans_pcie->mutex);
1587
1588 iwl_pcie_synchronize_irqs(trans);
1589 }
1590
1591 static void iwl_trans_pcie_write8(struct iwl_trans *trans, u32 ofs, u8 val)
1592 {
1593 writeb(val, IWL_TRANS_GET_PCIE_TRANS(trans)->hw_base + ofs);
1594 }
1595
1596 static void iwl_trans_pcie_write32(struct iwl_trans *trans, u32 ofs, u32 val)
1597 {
1598 writel(val, IWL_TRANS_GET_PCIE_TRANS(trans)->hw_base + ofs);
1599 }
1600
1601 static u32 iwl_trans_pcie_read32(struct iwl_trans *trans, u32 ofs)
1602 {
1603 return readl(IWL_TRANS_GET_PCIE_TRANS(trans)->hw_base + ofs);
1604 }
1605
1606 static u32 iwl_trans_pcie_read_prph(struct iwl_trans *trans, u32 reg)
1607 {
1608 iwl_trans_pcie_write32(trans, HBUS_TARG_PRPH_RADDR,
1609 ((reg & 0x000FFFFF) | (3 << 24)));
1610 return iwl_trans_pcie_read32(trans, HBUS_TARG_PRPH_RDAT);
1611 }
1612
1613 static void iwl_trans_pcie_write_prph(struct iwl_trans *trans, u32 addr,
1614 u32 val)
1615 {
1616 iwl_trans_pcie_write32(trans, HBUS_TARG_PRPH_WADDR,
1617 ((addr & 0x000FFFFF) | (3 << 24)));
1618 iwl_trans_pcie_write32(trans, HBUS_TARG_PRPH_WDAT, val);
1619 }
1620
1621 static void iwl_trans_pcie_configure(struct iwl_trans *trans,
1622 const struct iwl_trans_config *trans_cfg)
1623 {
1624 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1625
1626 trans_pcie->cmd_queue = trans_cfg->cmd_queue;
1627 trans_pcie->cmd_fifo = trans_cfg->cmd_fifo;
1628 trans_pcie->cmd_q_wdg_timeout = trans_cfg->cmd_q_wdg_timeout;
1629 if (WARN_ON(trans_cfg->n_no_reclaim_cmds > MAX_NO_RECLAIM_CMDS))
1630 trans_pcie->n_no_reclaim_cmds = 0;
1631 else
1632 trans_pcie->n_no_reclaim_cmds = trans_cfg->n_no_reclaim_cmds;
1633 if (trans_pcie->n_no_reclaim_cmds)
1634 memcpy(trans_pcie->no_reclaim_cmds, trans_cfg->no_reclaim_cmds,
1635 trans_pcie->n_no_reclaim_cmds * sizeof(u8));
1636
1637 trans_pcie->rx_buf_size = trans_cfg->rx_buf_size;
1638 trans_pcie->rx_page_order =
1639 iwl_trans_get_rb_size_order(trans_pcie->rx_buf_size);
1640
1641 trans_pcie->wide_cmd_header = trans_cfg->wide_cmd_header;
1642 trans_pcie->bc_table_dword = trans_cfg->bc_table_dword;
1643 trans_pcie->scd_set_active = trans_cfg->scd_set_active;
1644 trans_pcie->sw_csum_tx = trans_cfg->sw_csum_tx;
1645
1646 trans->command_groups = trans_cfg->command_groups;
1647 trans->command_groups_size = trans_cfg->command_groups_size;
1648
1649 /* Initialize NAPI here - it should be before registering to mac80211
1650 * in the opmode but after the HW struct is allocated.
1651 * As this function may be called again in some corner cases don't
1652 * do anything if NAPI was already initialized.
1653 */
1654 if (trans_pcie->napi_dev.reg_state != NETREG_DUMMY)
1655 init_dummy_netdev(&trans_pcie->napi_dev);
1656 }
1657
1658 void iwl_trans_pcie_free(struct iwl_trans *trans)
1659 {
1660 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1661 int i;
1662
1663 iwl_pcie_synchronize_irqs(trans);
1664
1665 iwl_pcie_tx_free(trans);
1666 iwl_pcie_rx_free(trans);
1667
1668 if (trans_pcie->msix_enabled) {
1669 for (i = 0; i < trans_pcie->allocated_vector; i++)
1670 free_irq(trans_pcie->msix_entries[i].vector,
1671 &trans_pcie->msix_entries[i]);
1672
1673 pci_disable_msix(trans_pcie->pci_dev);
1674 trans_pcie->msix_enabled = false;
1675 } else {
1676 free_irq(trans_pcie->pci_dev->irq, trans);
1677
1678 iwl_pcie_free_ict(trans);
1679
1680 pci_disable_msi(trans_pcie->pci_dev);
1681 }
1682 iounmap(trans_pcie->hw_base);
1683 pci_release_regions(trans_pcie->pci_dev);
1684 pci_disable_device(trans_pcie->pci_dev);
1685
1686 iwl_pcie_free_fw_monitor(trans);
1687
1688 for_each_possible_cpu(i) {
1689 struct iwl_tso_hdr_page *p =
1690 per_cpu_ptr(trans_pcie->tso_hdr_page, i);
1691
1692 if (p->page)
1693 __free_page(p->page);
1694 }
1695
1696 free_percpu(trans_pcie->tso_hdr_page);
1697 iwl_trans_free(trans);
1698 }
1699
1700 static void iwl_trans_pcie_set_pmi(struct iwl_trans *trans, bool state)
1701 {
1702 if (state)
1703 set_bit(STATUS_TPOWER_PMI, &trans->status);
1704 else
1705 clear_bit(STATUS_TPOWER_PMI, &trans->status);
1706 }
1707
1708 static bool iwl_trans_pcie_grab_nic_access(struct iwl_trans *trans,
1709 unsigned long *flags)
1710 {
1711 int ret;
1712 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1713
1714 spin_lock_irqsave(&trans_pcie->reg_lock, *flags);
1715
1716 if (trans_pcie->cmd_hold_nic_awake)
1717 goto out;
1718
1719 /* this bit wakes up the NIC */
1720 __iwl_trans_pcie_set_bit(trans, CSR_GP_CNTRL,
1721 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
1722 if (trans->cfg->device_family == IWL_DEVICE_FAMILY_8000)
1723 udelay(2);
1724
1725 /*
1726 * These bits say the device is running, and should keep running for
1727 * at least a short while (at least as long as MAC_ACCESS_REQ stays 1),
1728 * but they do not indicate that embedded SRAM is restored yet;
1729 * 3945 and 4965 have volatile SRAM, and must save/restore contents
1730 * to/from host DRAM when sleeping/waking for power-saving.
1731 * Each direction takes approximately 1/4 millisecond; with this
1732 * overhead, it's a good idea to grab and hold MAC_ACCESS_REQUEST if a
1733 * series of register accesses are expected (e.g. reading Event Log),
1734 * to keep device from sleeping.
1735 *
1736 * CSR_UCODE_DRV_GP1 register bit MAC_SLEEP == 0 indicates that
1737 * SRAM is okay/restored. We don't check that here because this call
1738 * is just for hardware register access; but GP1 MAC_SLEEP check is a
1739 * good idea before accessing 3945/4965 SRAM (e.g. reading Event Log).
1740 *
1741 * 5000 series and later (including 1000 series) have non-volatile SRAM,
1742 * and do not save/restore SRAM when power cycling.
1743 */
1744 ret = iwl_poll_bit(trans, CSR_GP_CNTRL,
1745 CSR_GP_CNTRL_REG_VAL_MAC_ACCESS_EN,
1746 (CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY |
1747 CSR_GP_CNTRL_REG_FLAG_GOING_TO_SLEEP), 15000);
1748 if (unlikely(ret < 0)) {
1749 iwl_write32(trans, CSR_RESET, CSR_RESET_REG_FLAG_FORCE_NMI);
1750 WARN_ONCE(1,
1751 "Timeout waiting for hardware access (CSR_GP_CNTRL 0x%08x)\n",
1752 iwl_read32(trans, CSR_GP_CNTRL));
1753 spin_unlock_irqrestore(&trans_pcie->reg_lock, *flags);
1754 return false;
1755 }
1756
1757 out:
1758 /*
1759 * Fool sparse by faking we release the lock - sparse will
1760 * track nic_access anyway.
1761 */
1762 __release(&trans_pcie->reg_lock);
1763 return true;
1764 }
1765
1766 static void iwl_trans_pcie_release_nic_access(struct iwl_trans *trans,
1767 unsigned long *flags)
1768 {
1769 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1770
1771 lockdep_assert_held(&trans_pcie->reg_lock);
1772
1773 /*
1774 * Fool sparse by faking we acquiring the lock - sparse will
1775 * track nic_access anyway.
1776 */
1777 __acquire(&trans_pcie->reg_lock);
1778
1779 if (trans_pcie->cmd_hold_nic_awake)
1780 goto out;
1781
1782 __iwl_trans_pcie_clear_bit(trans, CSR_GP_CNTRL,
1783 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
1784 /*
1785 * Above we read the CSR_GP_CNTRL register, which will flush
1786 * any previous writes, but we need the write that clears the
1787 * MAC_ACCESS_REQ bit to be performed before any other writes
1788 * scheduled on different CPUs (after we drop reg_lock).
1789 */
1790 mmiowb();
1791 out:
1792 spin_unlock_irqrestore(&trans_pcie->reg_lock, *flags);
1793 }
1794
1795 static int iwl_trans_pcie_read_mem(struct iwl_trans *trans, u32 addr,
1796 void *buf, int dwords)
1797 {
1798 unsigned long flags;
1799 int offs, ret = 0;
1800 u32 *vals = buf;
1801
1802 if (iwl_trans_grab_nic_access(trans, &flags)) {
1803 iwl_write32(trans, HBUS_TARG_MEM_RADDR, addr);
1804 for (offs = 0; offs < dwords; offs++)
1805 vals[offs] = iwl_read32(trans, HBUS_TARG_MEM_RDAT);
1806 iwl_trans_release_nic_access(trans, &flags);
1807 } else {
1808 ret = -EBUSY;
1809 }
1810 return ret;
1811 }
1812
1813 static int iwl_trans_pcie_write_mem(struct iwl_trans *trans, u32 addr,
1814 const void *buf, int dwords)
1815 {
1816 unsigned long flags;
1817 int offs, ret = 0;
1818 const u32 *vals = buf;
1819
1820 if (iwl_trans_grab_nic_access(trans, &flags)) {
1821 iwl_write32(trans, HBUS_TARG_MEM_WADDR, addr);
1822 for (offs = 0; offs < dwords; offs++)
1823 iwl_write32(trans, HBUS_TARG_MEM_WDAT,
1824 vals ? vals[offs] : 0);
1825 iwl_trans_release_nic_access(trans, &flags);
1826 } else {
1827 ret = -EBUSY;
1828 }
1829 return ret;
1830 }
1831
1832 static void iwl_trans_pcie_freeze_txq_timer(struct iwl_trans *trans,
1833 unsigned long txqs,
1834 bool freeze)
1835 {
1836 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1837 int queue;
1838
1839 for_each_set_bit(queue, &txqs, BITS_PER_LONG) {
1840 struct iwl_txq *txq = &trans_pcie->txq[queue];
1841 unsigned long now;
1842
1843 spin_lock_bh(&txq->lock);
1844
1845 now = jiffies;
1846
1847 if (txq->frozen == freeze)
1848 goto next_queue;
1849
1850 IWL_DEBUG_TX_QUEUES(trans, "%s TXQ %d\n",
1851 freeze ? "Freezing" : "Waking", queue);
1852
1853 txq->frozen = freeze;
1854
1855 if (txq->q.read_ptr == txq->q.write_ptr)
1856 goto next_queue;
1857
1858 if (freeze) {
1859 if (unlikely(time_after(now,
1860 txq->stuck_timer.expires))) {
1861 /*
1862 * The timer should have fired, maybe it is
1863 * spinning right now on the lock.
1864 */
1865 goto next_queue;
1866 }
1867 /* remember how long until the timer fires */
1868 txq->frozen_expiry_remainder =
1869 txq->stuck_timer.expires - now;
1870 del_timer(&txq->stuck_timer);
1871 goto next_queue;
1872 }
1873
1874 /*
1875 * Wake a non-empty queue -> arm timer with the
1876 * remainder before it froze
1877 */
1878 mod_timer(&txq->stuck_timer,
1879 now + txq->frozen_expiry_remainder);
1880
1881 next_queue:
1882 spin_unlock_bh(&txq->lock);
1883 }
1884 }
1885
1886 static void iwl_trans_pcie_block_txq_ptrs(struct iwl_trans *trans, bool block)
1887 {
1888 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1889 int i;
1890
1891 for (i = 0; i < trans->cfg->base_params->num_of_queues; i++) {
1892 struct iwl_txq *txq = &trans_pcie->txq[i];
1893
1894 if (i == trans_pcie->cmd_queue)
1895 continue;
1896
1897 spin_lock_bh(&txq->lock);
1898
1899 if (!block && !(WARN_ON_ONCE(!txq->block))) {
1900 txq->block--;
1901 if (!txq->block) {
1902 iwl_write32(trans, HBUS_TARG_WRPTR,
1903 txq->q.write_ptr | (i << 8));
1904 }
1905 } else if (block) {
1906 txq->block++;
1907 }
1908
1909 spin_unlock_bh(&txq->lock);
1910 }
1911 }
1912
1913 #define IWL_FLUSH_WAIT_MS 2000
1914
1915 static int iwl_trans_pcie_wait_txq_empty(struct iwl_trans *trans, u32 txq_bm)
1916 {
1917 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1918 struct iwl_txq *txq;
1919 struct iwl_queue *q;
1920 int cnt;
1921 unsigned long now = jiffies;
1922 u32 scd_sram_addr;
1923 u8 buf[16];
1924 int ret = 0;
1925
1926 /* waiting for all the tx frames complete might take a while */
1927 for (cnt = 0; cnt < trans->cfg->base_params->num_of_queues; cnt++) {
1928 u8 wr_ptr;
1929
1930 if (cnt == trans_pcie->cmd_queue)
1931 continue;
1932 if (!test_bit(cnt, trans_pcie->queue_used))
1933 continue;
1934 if (!(BIT(cnt) & txq_bm))
1935 continue;
1936
1937 IWL_DEBUG_TX_QUEUES(trans, "Emptying queue %d...\n", cnt);
1938 txq = &trans_pcie->txq[cnt];
1939 q = &txq->q;
1940 wr_ptr = ACCESS_ONCE(q->write_ptr);
1941
1942 while (q->read_ptr != ACCESS_ONCE(q->write_ptr) &&
1943 !time_after(jiffies,
1944 now + msecs_to_jiffies(IWL_FLUSH_WAIT_MS))) {
1945 u8 write_ptr = ACCESS_ONCE(q->write_ptr);
1946
1947 if (WARN_ONCE(wr_ptr != write_ptr,
1948 "WR pointer moved while flushing %d -> %d\n",
1949 wr_ptr, write_ptr))
1950 return -ETIMEDOUT;
1951 msleep(1);
1952 }
1953
1954 if (q->read_ptr != q->write_ptr) {
1955 IWL_ERR(trans,
1956 "fail to flush all tx fifo queues Q %d\n", cnt);
1957 ret = -ETIMEDOUT;
1958 break;
1959 }
1960 IWL_DEBUG_TX_QUEUES(trans, "Queue %d is now empty.\n", cnt);
1961 }
1962
1963 if (!ret)
1964 return 0;
1965
1966 IWL_ERR(trans, "Current SW read_ptr %d write_ptr %d\n",
1967 txq->q.read_ptr, txq->q.write_ptr);
1968
1969 scd_sram_addr = trans_pcie->scd_base_addr +
1970 SCD_TX_STTS_QUEUE_OFFSET(txq->q.id);
1971 iwl_trans_read_mem_bytes(trans, scd_sram_addr, buf, sizeof(buf));
1972
1973 iwl_print_hex_error(trans, buf, sizeof(buf));
1974
1975 for (cnt = 0; cnt < FH_TCSR_CHNL_NUM; cnt++)
1976 IWL_ERR(trans, "FH TRBs(%d) = 0x%08x\n", cnt,
1977 iwl_read_direct32(trans, FH_TX_TRB_REG(cnt)));
1978
1979 for (cnt = 0; cnt < trans->cfg->base_params->num_of_queues; cnt++) {
1980 u32 status = iwl_read_prph(trans, SCD_QUEUE_STATUS_BITS(cnt));
1981 u8 fifo = (status >> SCD_QUEUE_STTS_REG_POS_TXF) & 0x7;
1982 bool active = !!(status & BIT(SCD_QUEUE_STTS_REG_POS_ACTIVE));
1983 u32 tbl_dw =
1984 iwl_trans_read_mem32(trans, trans_pcie->scd_base_addr +
1985 SCD_TRANS_TBL_OFFSET_QUEUE(cnt));
1986
1987 if (cnt & 0x1)
1988 tbl_dw = (tbl_dw & 0xFFFF0000) >> 16;
1989 else
1990 tbl_dw = tbl_dw & 0x0000FFFF;
1991
1992 IWL_ERR(trans,
1993 "Q %d is %sactive and mapped to fifo %d ra_tid 0x%04x [%d,%d]\n",
1994 cnt, active ? "" : "in", fifo, tbl_dw,
1995 iwl_read_prph(trans, SCD_QUEUE_RDPTR(cnt)) &
1996 (TFD_QUEUE_SIZE_MAX - 1),
1997 iwl_read_prph(trans, SCD_QUEUE_WRPTR(cnt)));
1998 }
1999
2000 return ret;
2001 }
2002
2003 static void iwl_trans_pcie_set_bits_mask(struct iwl_trans *trans, u32 reg,
2004 u32 mask, u32 value)
2005 {
2006 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2007 unsigned long flags;
2008
2009 spin_lock_irqsave(&trans_pcie->reg_lock, flags);
2010 __iwl_trans_pcie_set_bits_mask(trans, reg, mask, value);
2011 spin_unlock_irqrestore(&trans_pcie->reg_lock, flags);
2012 }
2013
2014 void iwl_trans_pcie_ref(struct iwl_trans *trans)
2015 {
2016 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2017 unsigned long flags;
2018
2019 if (iwlwifi_mod_params.d0i3_disable)
2020 return;
2021
2022 spin_lock_irqsave(&trans_pcie->ref_lock, flags);
2023 IWL_DEBUG_RPM(trans, "ref_counter: %d\n", trans_pcie->ref_count);
2024 trans_pcie->ref_count++;
2025 pm_runtime_get(&trans_pcie->pci_dev->dev);
2026 spin_unlock_irqrestore(&trans_pcie->ref_lock, flags);
2027 }
2028
2029 void iwl_trans_pcie_unref(struct iwl_trans *trans)
2030 {
2031 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2032 unsigned long flags;
2033
2034 if (iwlwifi_mod_params.d0i3_disable)
2035 return;
2036
2037 spin_lock_irqsave(&trans_pcie->ref_lock, flags);
2038 IWL_DEBUG_RPM(trans, "ref_counter: %d\n", trans_pcie->ref_count);
2039 if (WARN_ON_ONCE(trans_pcie->ref_count == 0)) {
2040 spin_unlock_irqrestore(&trans_pcie->ref_lock, flags);
2041 return;
2042 }
2043 trans_pcie->ref_count--;
2044
2045 pm_runtime_mark_last_busy(&trans_pcie->pci_dev->dev);
2046 pm_runtime_put_autosuspend(&trans_pcie->pci_dev->dev);
2047
2048 spin_unlock_irqrestore(&trans_pcie->ref_lock, flags);
2049 }
2050
2051 static const char *get_csr_string(int cmd)
2052 {
2053 #define IWL_CMD(x) case x: return #x
2054 switch (cmd) {
2055 IWL_CMD(CSR_HW_IF_CONFIG_REG);
2056 IWL_CMD(CSR_INT_COALESCING);
2057 IWL_CMD(CSR_INT);
2058 IWL_CMD(CSR_INT_MASK);
2059 IWL_CMD(CSR_FH_INT_STATUS);
2060 IWL_CMD(CSR_GPIO_IN);
2061 IWL_CMD(CSR_RESET);
2062 IWL_CMD(CSR_GP_CNTRL);
2063 IWL_CMD(CSR_HW_REV);
2064 IWL_CMD(CSR_EEPROM_REG);
2065 IWL_CMD(CSR_EEPROM_GP);
2066 IWL_CMD(CSR_OTP_GP_REG);
2067 IWL_CMD(CSR_GIO_REG);
2068 IWL_CMD(CSR_GP_UCODE_REG);
2069 IWL_CMD(CSR_GP_DRIVER_REG);
2070 IWL_CMD(CSR_UCODE_DRV_GP1);
2071 IWL_CMD(CSR_UCODE_DRV_GP2);
2072 IWL_CMD(CSR_LED_REG);
2073 IWL_CMD(CSR_DRAM_INT_TBL_REG);
2074 IWL_CMD(CSR_GIO_CHICKEN_BITS);
2075 IWL_CMD(CSR_ANA_PLL_CFG);
2076 IWL_CMD(CSR_HW_REV_WA_REG);
2077 IWL_CMD(CSR_MONITOR_STATUS_REG);
2078 IWL_CMD(CSR_DBG_HPET_MEM_REG);
2079 default:
2080 return "UNKNOWN";
2081 }
2082 #undef IWL_CMD
2083 }
2084
2085 void iwl_pcie_dump_csr(struct iwl_trans *trans)
2086 {
2087 int i;
2088 static const u32 csr_tbl[] = {
2089 CSR_HW_IF_CONFIG_REG,
2090 CSR_INT_COALESCING,
2091 CSR_INT,
2092 CSR_INT_MASK,
2093 CSR_FH_INT_STATUS,
2094 CSR_GPIO_IN,
2095 CSR_RESET,
2096 CSR_GP_CNTRL,
2097 CSR_HW_REV,
2098 CSR_EEPROM_REG,
2099 CSR_EEPROM_GP,
2100 CSR_OTP_GP_REG,
2101 CSR_GIO_REG,
2102 CSR_GP_UCODE_REG,
2103 CSR_GP_DRIVER_REG,
2104 CSR_UCODE_DRV_GP1,
2105 CSR_UCODE_DRV_GP2,
2106 CSR_LED_REG,
2107 CSR_DRAM_INT_TBL_REG,
2108 CSR_GIO_CHICKEN_BITS,
2109 CSR_ANA_PLL_CFG,
2110 CSR_MONITOR_STATUS_REG,
2111 CSR_HW_REV_WA_REG,
2112 CSR_DBG_HPET_MEM_REG
2113 };
2114 IWL_ERR(trans, "CSR values:\n");
2115 IWL_ERR(trans, "(2nd byte of CSR_INT_COALESCING is "
2116 "CSR_INT_PERIODIC_REG)\n");
2117 for (i = 0; i < ARRAY_SIZE(csr_tbl); i++) {
2118 IWL_ERR(trans, " %25s: 0X%08x\n",
2119 get_csr_string(csr_tbl[i]),
2120 iwl_read32(trans, csr_tbl[i]));
2121 }
2122 }
2123
2124 #ifdef CONFIG_IWLWIFI_DEBUGFS
2125 /* create and remove of files */
2126 #define DEBUGFS_ADD_FILE(name, parent, mode) do { \
2127 if (!debugfs_create_file(#name, mode, parent, trans, \
2128 &iwl_dbgfs_##name##_ops)) \
2129 goto err; \
2130 } while (0)
2131
2132 /* file operation */
2133 #define DEBUGFS_READ_FILE_OPS(name) \
2134 static const struct file_operations iwl_dbgfs_##name##_ops = { \
2135 .read = iwl_dbgfs_##name##_read, \
2136 .open = simple_open, \
2137 .llseek = generic_file_llseek, \
2138 };
2139
2140 #define DEBUGFS_WRITE_FILE_OPS(name) \
2141 static const struct file_operations iwl_dbgfs_##name##_ops = { \
2142 .write = iwl_dbgfs_##name##_write, \
2143 .open = simple_open, \
2144 .llseek = generic_file_llseek, \
2145 };
2146
2147 #define DEBUGFS_READ_WRITE_FILE_OPS(name) \
2148 static const struct file_operations iwl_dbgfs_##name##_ops = { \
2149 .write = iwl_dbgfs_##name##_write, \
2150 .read = iwl_dbgfs_##name##_read, \
2151 .open = simple_open, \
2152 .llseek = generic_file_llseek, \
2153 };
2154
2155 static ssize_t iwl_dbgfs_tx_queue_read(struct file *file,
2156 char __user *user_buf,
2157 size_t count, loff_t *ppos)
2158 {
2159 struct iwl_trans *trans = file->private_data;
2160 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2161 struct iwl_txq *txq;
2162 struct iwl_queue *q;
2163 char *buf;
2164 int pos = 0;
2165 int cnt;
2166 int ret;
2167 size_t bufsz;
2168
2169 bufsz = sizeof(char) * 75 * trans->cfg->base_params->num_of_queues;
2170
2171 if (!trans_pcie->txq)
2172 return -EAGAIN;
2173
2174 buf = kzalloc(bufsz, GFP_KERNEL);
2175 if (!buf)
2176 return -ENOMEM;
2177
2178 for (cnt = 0; cnt < trans->cfg->base_params->num_of_queues; cnt++) {
2179 txq = &trans_pcie->txq[cnt];
2180 q = &txq->q;
2181 pos += scnprintf(buf + pos, bufsz - pos,
2182 "hwq %.2d: read=%u write=%u use=%d stop=%d need_update=%d frozen=%d%s\n",
2183 cnt, q->read_ptr, q->write_ptr,
2184 !!test_bit(cnt, trans_pcie->queue_used),
2185 !!test_bit(cnt, trans_pcie->queue_stopped),
2186 txq->need_update, txq->frozen,
2187 (cnt == trans_pcie->cmd_queue ? " HCMD" : ""));
2188 }
2189 ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
2190 kfree(buf);
2191 return ret;
2192 }
2193
2194 static ssize_t iwl_dbgfs_rx_queue_read(struct file *file,
2195 char __user *user_buf,
2196 size_t count, loff_t *ppos)
2197 {
2198 struct iwl_trans *trans = file->private_data;
2199 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2200 char *buf;
2201 int pos = 0, i, ret;
2202 size_t bufsz = sizeof(buf);
2203
2204 bufsz = sizeof(char) * 121 * trans->num_rx_queues;
2205
2206 if (!trans_pcie->rxq)
2207 return -EAGAIN;
2208
2209 buf = kzalloc(bufsz, GFP_KERNEL);
2210 if (!buf)
2211 return -ENOMEM;
2212
2213 for (i = 0; i < trans->num_rx_queues && pos < bufsz; i++) {
2214 struct iwl_rxq *rxq = &trans_pcie->rxq[i];
2215
2216 pos += scnprintf(buf + pos, bufsz - pos, "queue#: %2d\n",
2217 i);
2218 pos += scnprintf(buf + pos, bufsz - pos, "\tread: %u\n",
2219 rxq->read);
2220 pos += scnprintf(buf + pos, bufsz - pos, "\twrite: %u\n",
2221 rxq->write);
2222 pos += scnprintf(buf + pos, bufsz - pos, "\twrite_actual: %u\n",
2223 rxq->write_actual);
2224 pos += scnprintf(buf + pos, bufsz - pos, "\tneed_update: %2d\n",
2225 rxq->need_update);
2226 pos += scnprintf(buf + pos, bufsz - pos, "\tfree_count: %u\n",
2227 rxq->free_count);
2228 if (rxq->rb_stts) {
2229 pos += scnprintf(buf + pos, bufsz - pos,
2230 "\tclosed_rb_num: %u\n",
2231 le16_to_cpu(rxq->rb_stts->closed_rb_num) &
2232 0x0FFF);
2233 } else {
2234 pos += scnprintf(buf + pos, bufsz - pos,
2235 "\tclosed_rb_num: Not Allocated\n");
2236 }
2237 }
2238 ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
2239 kfree(buf);
2240
2241 return ret;
2242 }
2243
2244 static ssize_t iwl_dbgfs_interrupt_read(struct file *file,
2245 char __user *user_buf,
2246 size_t count, loff_t *ppos)
2247 {
2248 struct iwl_trans *trans = file->private_data;
2249 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2250 struct isr_statistics *isr_stats = &trans_pcie->isr_stats;
2251
2252 int pos = 0;
2253 char *buf;
2254 int bufsz = 24 * 64; /* 24 items * 64 char per item */
2255 ssize_t ret;
2256
2257 buf = kzalloc(bufsz, GFP_KERNEL);
2258 if (!buf)
2259 return -ENOMEM;
2260
2261 pos += scnprintf(buf + pos, bufsz - pos,
2262 "Interrupt Statistics Report:\n");
2263
2264 pos += scnprintf(buf + pos, bufsz - pos, "HW Error:\t\t\t %u\n",
2265 isr_stats->hw);
2266 pos += scnprintf(buf + pos, bufsz - pos, "SW Error:\t\t\t %u\n",
2267 isr_stats->sw);
2268 if (isr_stats->sw || isr_stats->hw) {
2269 pos += scnprintf(buf + pos, bufsz - pos,
2270 "\tLast Restarting Code: 0x%X\n",
2271 isr_stats->err_code);
2272 }
2273 #ifdef CONFIG_IWLWIFI_DEBUG
2274 pos += scnprintf(buf + pos, bufsz - pos, "Frame transmitted:\t\t %u\n",
2275 isr_stats->sch);
2276 pos += scnprintf(buf + pos, bufsz - pos, "Alive interrupt:\t\t %u\n",
2277 isr_stats->alive);
2278 #endif
2279 pos += scnprintf(buf + pos, bufsz - pos,
2280 "HW RF KILL switch toggled:\t %u\n", isr_stats->rfkill);
2281
2282 pos += scnprintf(buf + pos, bufsz - pos, "CT KILL:\t\t\t %u\n",
2283 isr_stats->ctkill);
2284
2285 pos += scnprintf(buf + pos, bufsz - pos, "Wakeup Interrupt:\t\t %u\n",
2286 isr_stats->wakeup);
2287
2288 pos += scnprintf(buf + pos, bufsz - pos,
2289 "Rx command responses:\t\t %u\n", isr_stats->rx);
2290
2291 pos += scnprintf(buf + pos, bufsz - pos, "Tx/FH interrupt:\t\t %u\n",
2292 isr_stats->tx);
2293
2294 pos += scnprintf(buf + pos, bufsz - pos, "Unexpected INTA:\t\t %u\n",
2295 isr_stats->unhandled);
2296
2297 ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
2298 kfree(buf);
2299 return ret;
2300 }
2301
2302 static ssize_t iwl_dbgfs_interrupt_write(struct file *file,
2303 const char __user *user_buf,
2304 size_t count, loff_t *ppos)
2305 {
2306 struct iwl_trans *trans = file->private_data;
2307 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2308 struct isr_statistics *isr_stats = &trans_pcie->isr_stats;
2309
2310 char buf[8];
2311 int buf_size;
2312 u32 reset_flag;
2313
2314 memset(buf, 0, sizeof(buf));
2315 buf_size = min(count, sizeof(buf) - 1);
2316 if (copy_from_user(buf, user_buf, buf_size))
2317 return -EFAULT;
2318 if (sscanf(buf, "%x", &reset_flag) != 1)
2319 return -EFAULT;
2320 if (reset_flag == 0)
2321 memset(isr_stats, 0, sizeof(*isr_stats));
2322
2323 return count;
2324 }
2325
2326 static ssize_t iwl_dbgfs_csr_write(struct file *file,
2327 const char __user *user_buf,
2328 size_t count, loff_t *ppos)
2329 {
2330 struct iwl_trans *trans = file->private_data;
2331 char buf[8];
2332 int buf_size;
2333 int csr;
2334
2335 memset(buf, 0, sizeof(buf));
2336 buf_size = min(count, sizeof(buf) - 1);
2337 if (copy_from_user(buf, user_buf, buf_size))
2338 return -EFAULT;
2339 if (sscanf(buf, "%d", &csr) != 1)
2340 return -EFAULT;
2341
2342 iwl_pcie_dump_csr(trans);
2343
2344 return count;
2345 }
2346
2347 static ssize_t iwl_dbgfs_fh_reg_read(struct file *file,
2348 char __user *user_buf,
2349 size_t count, loff_t *ppos)
2350 {
2351 struct iwl_trans *trans = file->private_data;
2352 char *buf = NULL;
2353 ssize_t ret;
2354
2355 ret = iwl_dump_fh(trans, &buf);
2356 if (ret < 0)
2357 return ret;
2358 if (!buf)
2359 return -EINVAL;
2360 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
2361 kfree(buf);
2362 return ret;
2363 }
2364
2365 DEBUGFS_READ_WRITE_FILE_OPS(interrupt);
2366 DEBUGFS_READ_FILE_OPS(fh_reg);
2367 DEBUGFS_READ_FILE_OPS(rx_queue);
2368 DEBUGFS_READ_FILE_OPS(tx_queue);
2369 DEBUGFS_WRITE_FILE_OPS(csr);
2370
2371 /* Create the debugfs files and directories */
2372 int iwl_trans_pcie_dbgfs_register(struct iwl_trans *trans)
2373 {
2374 struct dentry *dir = trans->dbgfs_dir;
2375
2376 DEBUGFS_ADD_FILE(rx_queue, dir, S_IRUSR);
2377 DEBUGFS_ADD_FILE(tx_queue, dir, S_IRUSR);
2378 DEBUGFS_ADD_FILE(interrupt, dir, S_IWUSR | S_IRUSR);
2379 DEBUGFS_ADD_FILE(csr, dir, S_IWUSR);
2380 DEBUGFS_ADD_FILE(fh_reg, dir, S_IRUSR);
2381 return 0;
2382
2383 err:
2384 IWL_ERR(trans, "failed to create the trans debugfs entry\n");
2385 return -ENOMEM;
2386 }
2387 #endif /*CONFIG_IWLWIFI_DEBUGFS */
2388
2389 static u32 iwl_trans_pcie_get_cmdlen(struct iwl_tfd *tfd)
2390 {
2391 u32 cmdlen = 0;
2392 int i;
2393
2394 for (i = 0; i < IWL_NUM_OF_TBS; i++)
2395 cmdlen += iwl_pcie_tfd_tb_get_len(tfd, i);
2396
2397 return cmdlen;
2398 }
2399
2400 static u32 iwl_trans_pcie_dump_rbs(struct iwl_trans *trans,
2401 struct iwl_fw_error_dump_data **data,
2402 int allocated_rb_nums)
2403 {
2404 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2405 int max_len = PAGE_SIZE << trans_pcie->rx_page_order;
2406 /* Dump RBs is supported only for pre-9000 devices (1 queue) */
2407 struct iwl_rxq *rxq = &trans_pcie->rxq[0];
2408 u32 i, r, j, rb_len = 0;
2409
2410 spin_lock(&rxq->lock);
2411
2412 r = le16_to_cpu(ACCESS_ONCE(rxq->rb_stts->closed_rb_num)) & 0x0FFF;
2413
2414 for (i = rxq->read, j = 0;
2415 i != r && j < allocated_rb_nums;
2416 i = (i + 1) & RX_QUEUE_MASK, j++) {
2417 struct iwl_rx_mem_buffer *rxb = rxq->queue[i];
2418 struct iwl_fw_error_dump_rb *rb;
2419
2420 dma_unmap_page(trans->dev, rxb->page_dma, max_len,
2421 DMA_FROM_DEVICE);
2422
2423 rb_len += sizeof(**data) + sizeof(*rb) + max_len;
2424
2425 (*data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_RB);
2426 (*data)->len = cpu_to_le32(sizeof(*rb) + max_len);
2427 rb = (void *)(*data)->data;
2428 rb->index = cpu_to_le32(i);
2429 memcpy(rb->data, page_address(rxb->page), max_len);
2430 /* remap the page for the free benefit */
2431 rxb->page_dma = dma_map_page(trans->dev, rxb->page, 0,
2432 max_len,
2433 DMA_FROM_DEVICE);
2434
2435 *data = iwl_fw_error_next_data(*data);
2436 }
2437
2438 spin_unlock(&rxq->lock);
2439
2440 return rb_len;
2441 }
2442 #define IWL_CSR_TO_DUMP (0x250)
2443
2444 static u32 iwl_trans_pcie_dump_csr(struct iwl_trans *trans,
2445 struct iwl_fw_error_dump_data **data)
2446 {
2447 u32 csr_len = sizeof(**data) + IWL_CSR_TO_DUMP;
2448 __le32 *val;
2449 int i;
2450
2451 (*data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_CSR);
2452 (*data)->len = cpu_to_le32(IWL_CSR_TO_DUMP);
2453 val = (void *)(*data)->data;
2454
2455 for (i = 0; i < IWL_CSR_TO_DUMP; i += 4)
2456 *val++ = cpu_to_le32(iwl_trans_pcie_read32(trans, i));
2457
2458 *data = iwl_fw_error_next_data(*data);
2459
2460 return csr_len;
2461 }
2462
2463 static u32 iwl_trans_pcie_fh_regs_dump(struct iwl_trans *trans,
2464 struct iwl_fw_error_dump_data **data)
2465 {
2466 u32 fh_regs_len = FH_MEM_UPPER_BOUND - FH_MEM_LOWER_BOUND;
2467 unsigned long flags;
2468 __le32 *val;
2469 int i;
2470
2471 if (!iwl_trans_grab_nic_access(trans, &flags))
2472 return 0;
2473
2474 (*data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_FH_REGS);
2475 (*data)->len = cpu_to_le32(fh_regs_len);
2476 val = (void *)(*data)->data;
2477
2478 for (i = FH_MEM_LOWER_BOUND; i < FH_MEM_UPPER_BOUND; i += sizeof(u32))
2479 *val++ = cpu_to_le32(iwl_trans_pcie_read32(trans, i));
2480
2481 iwl_trans_release_nic_access(trans, &flags);
2482
2483 *data = iwl_fw_error_next_data(*data);
2484
2485 return sizeof(**data) + fh_regs_len;
2486 }
2487
2488 static u32
2489 iwl_trans_pci_dump_marbh_monitor(struct iwl_trans *trans,
2490 struct iwl_fw_error_dump_fw_mon *fw_mon_data,
2491 u32 monitor_len)
2492 {
2493 u32 buf_size_in_dwords = (monitor_len >> 2);
2494 u32 *buffer = (u32 *)fw_mon_data->data;
2495 unsigned long flags;
2496 u32 i;
2497
2498 if (!iwl_trans_grab_nic_access(trans, &flags))
2499 return 0;
2500
2501 iwl_write_prph_no_grab(trans, MON_DMARB_RD_CTL_ADDR, 0x1);
2502 for (i = 0; i < buf_size_in_dwords; i++)
2503 buffer[i] = iwl_read_prph_no_grab(trans,
2504 MON_DMARB_RD_DATA_ADDR);
2505 iwl_write_prph_no_grab(trans, MON_DMARB_RD_CTL_ADDR, 0x0);
2506
2507 iwl_trans_release_nic_access(trans, &flags);
2508
2509 return monitor_len;
2510 }
2511
2512 static u32
2513 iwl_trans_pcie_dump_monitor(struct iwl_trans *trans,
2514 struct iwl_fw_error_dump_data **data,
2515 u32 monitor_len)
2516 {
2517 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2518 u32 len = 0;
2519
2520 if ((trans_pcie->fw_mon_page &&
2521 trans->cfg->device_family == IWL_DEVICE_FAMILY_7000) ||
2522 trans->dbg_dest_tlv) {
2523 struct iwl_fw_error_dump_fw_mon *fw_mon_data;
2524 u32 base, write_ptr, wrap_cnt;
2525
2526 /* If there was a dest TLV - use the values from there */
2527 if (trans->dbg_dest_tlv) {
2528 write_ptr =
2529 le32_to_cpu(trans->dbg_dest_tlv->write_ptr_reg);
2530 wrap_cnt = le32_to_cpu(trans->dbg_dest_tlv->wrap_count);
2531 base = le32_to_cpu(trans->dbg_dest_tlv->base_reg);
2532 } else {
2533 base = MON_BUFF_BASE_ADDR;
2534 write_ptr = MON_BUFF_WRPTR;
2535 wrap_cnt = MON_BUFF_CYCLE_CNT;
2536 }
2537
2538 (*data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_FW_MONITOR);
2539 fw_mon_data = (void *)(*data)->data;
2540 fw_mon_data->fw_mon_wr_ptr =
2541 cpu_to_le32(iwl_read_prph(trans, write_ptr));
2542 fw_mon_data->fw_mon_cycle_cnt =
2543 cpu_to_le32(iwl_read_prph(trans, wrap_cnt));
2544 fw_mon_data->fw_mon_base_ptr =
2545 cpu_to_le32(iwl_read_prph(trans, base));
2546
2547 len += sizeof(**data) + sizeof(*fw_mon_data);
2548 if (trans_pcie->fw_mon_page) {
2549 /*
2550 * The firmware is now asserted, it won't write anything
2551 * to the buffer. CPU can take ownership to fetch the
2552 * data. The buffer will be handed back to the device
2553 * before the firmware will be restarted.
2554 */
2555 dma_sync_single_for_cpu(trans->dev,
2556 trans_pcie->fw_mon_phys,
2557 trans_pcie->fw_mon_size,
2558 DMA_FROM_DEVICE);
2559 memcpy(fw_mon_data->data,
2560 page_address(trans_pcie->fw_mon_page),
2561 trans_pcie->fw_mon_size);
2562
2563 monitor_len = trans_pcie->fw_mon_size;
2564 } else if (trans->dbg_dest_tlv->monitor_mode == SMEM_MODE) {
2565 /*
2566 * Update pointers to reflect actual values after
2567 * shifting
2568 */
2569 base = iwl_read_prph(trans, base) <<
2570 trans->dbg_dest_tlv->base_shift;
2571 iwl_trans_read_mem(trans, base, fw_mon_data->data,
2572 monitor_len / sizeof(u32));
2573 } else if (trans->dbg_dest_tlv->monitor_mode == MARBH_MODE) {
2574 monitor_len =
2575 iwl_trans_pci_dump_marbh_monitor(trans,
2576 fw_mon_data,
2577 monitor_len);
2578 } else {
2579 /* Didn't match anything - output no monitor data */
2580 monitor_len = 0;
2581 }
2582
2583 len += monitor_len;
2584 (*data)->len = cpu_to_le32(monitor_len + sizeof(*fw_mon_data));
2585 }
2586
2587 return len;
2588 }
2589
2590 static struct iwl_trans_dump_data
2591 *iwl_trans_pcie_dump_data(struct iwl_trans *trans,
2592 const struct iwl_fw_dbg_trigger_tlv *trigger)
2593 {
2594 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2595 struct iwl_fw_error_dump_data *data;
2596 struct iwl_txq *cmdq = &trans_pcie->txq[trans_pcie->cmd_queue];
2597 struct iwl_fw_error_dump_txcmd *txcmd;
2598 struct iwl_trans_dump_data *dump_data;
2599 u32 len, num_rbs;
2600 u32 monitor_len;
2601 int i, ptr;
2602 bool dump_rbs = test_bit(STATUS_FW_ERROR, &trans->status) &&
2603 !trans->cfg->mq_rx_supported;
2604
2605 /* transport dump header */
2606 len = sizeof(*dump_data);
2607
2608 /* host commands */
2609 len += sizeof(*data) +
2610 cmdq->q.n_window * (sizeof(*txcmd) + TFD_MAX_PAYLOAD_SIZE);
2611
2612 /* FW monitor */
2613 if (trans_pcie->fw_mon_page) {
2614 len += sizeof(*data) + sizeof(struct iwl_fw_error_dump_fw_mon) +
2615 trans_pcie->fw_mon_size;
2616 monitor_len = trans_pcie->fw_mon_size;
2617 } else if (trans->dbg_dest_tlv) {
2618 u32 base, end;
2619
2620 base = le32_to_cpu(trans->dbg_dest_tlv->base_reg);
2621 end = le32_to_cpu(trans->dbg_dest_tlv->end_reg);
2622
2623 base = iwl_read_prph(trans, base) <<
2624 trans->dbg_dest_tlv->base_shift;
2625 end = iwl_read_prph(trans, end) <<
2626 trans->dbg_dest_tlv->end_shift;
2627
2628 /* Make "end" point to the actual end */
2629 if (trans->cfg->device_family == IWL_DEVICE_FAMILY_8000 ||
2630 trans->dbg_dest_tlv->monitor_mode == MARBH_MODE)
2631 end += (1 << trans->dbg_dest_tlv->end_shift);
2632 monitor_len = end - base;
2633 len += sizeof(*data) + sizeof(struct iwl_fw_error_dump_fw_mon) +
2634 monitor_len;
2635 } else {
2636 monitor_len = 0;
2637 }
2638
2639 if (trigger && (trigger->mode & IWL_FW_DBG_TRIGGER_MONITOR_ONLY)) {
2640 dump_data = vzalloc(len);
2641 if (!dump_data)
2642 return NULL;
2643
2644 data = (void *)dump_data->data;
2645 len = iwl_trans_pcie_dump_monitor(trans, &data, monitor_len);
2646 dump_data->len = len;
2647
2648 return dump_data;
2649 }
2650
2651 /* CSR registers */
2652 len += sizeof(*data) + IWL_CSR_TO_DUMP;
2653
2654 /* FH registers */
2655 len += sizeof(*data) + (FH_MEM_UPPER_BOUND - FH_MEM_LOWER_BOUND);
2656
2657 if (dump_rbs) {
2658 /* Dump RBs is supported only for pre-9000 devices (1 queue) */
2659 struct iwl_rxq *rxq = &trans_pcie->rxq[0];
2660 /* RBs */
2661 num_rbs = le16_to_cpu(ACCESS_ONCE(rxq->rb_stts->closed_rb_num))
2662 & 0x0FFF;
2663 num_rbs = (num_rbs - rxq->read) & RX_QUEUE_MASK;
2664 len += num_rbs * (sizeof(*data) +
2665 sizeof(struct iwl_fw_error_dump_rb) +
2666 (PAGE_SIZE << trans_pcie->rx_page_order));
2667 }
2668
2669 dump_data = vzalloc(len);
2670 if (!dump_data)
2671 return NULL;
2672
2673 len = 0;
2674 data = (void *)dump_data->data;
2675 data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_TXCMD);
2676 txcmd = (void *)data->data;
2677 spin_lock_bh(&cmdq->lock);
2678 ptr = cmdq->q.write_ptr;
2679 for (i = 0; i < cmdq->q.n_window; i++) {
2680 u8 idx = get_cmd_index(&cmdq->q, ptr);
2681 u32 caplen, cmdlen;
2682
2683 cmdlen = iwl_trans_pcie_get_cmdlen(&cmdq->tfds[ptr]);
2684 caplen = min_t(u32, TFD_MAX_PAYLOAD_SIZE, cmdlen);
2685
2686 if (cmdlen) {
2687 len += sizeof(*txcmd) + caplen;
2688 txcmd->cmdlen = cpu_to_le32(cmdlen);
2689 txcmd->caplen = cpu_to_le32(caplen);
2690 memcpy(txcmd->data, cmdq->entries[idx].cmd, caplen);
2691 txcmd = (void *)((u8 *)txcmd->data + caplen);
2692 }
2693
2694 ptr = iwl_queue_dec_wrap(ptr);
2695 }
2696 spin_unlock_bh(&cmdq->lock);
2697
2698 data->len = cpu_to_le32(len);
2699 len += sizeof(*data);
2700 data = iwl_fw_error_next_data(data);
2701
2702 len += iwl_trans_pcie_dump_csr(trans, &data);
2703 len += iwl_trans_pcie_fh_regs_dump(trans, &data);
2704 if (dump_rbs)
2705 len += iwl_trans_pcie_dump_rbs(trans, &data, num_rbs);
2706
2707 len += iwl_trans_pcie_dump_monitor(trans, &data, monitor_len);
2708
2709 dump_data->len = len;
2710
2711 return dump_data;
2712 }
2713
2714 #ifdef CONFIG_PM_SLEEP
2715 static int iwl_trans_pcie_suspend(struct iwl_trans *trans)
2716 {
2717 if (trans->runtime_pm_mode == IWL_PLAT_PM_MODE_D0I3)
2718 return iwl_pci_fw_enter_d0i3(trans);
2719
2720 return 0;
2721 }
2722
2723 static void iwl_trans_pcie_resume(struct iwl_trans *trans)
2724 {
2725 if (trans->runtime_pm_mode == IWL_PLAT_PM_MODE_D0I3)
2726 iwl_pci_fw_exit_d0i3(trans);
2727 }
2728 #endif /* CONFIG_PM_SLEEP */
2729
2730 static const struct iwl_trans_ops trans_ops_pcie = {
2731 .start_hw = iwl_trans_pcie_start_hw,
2732 .op_mode_leave = iwl_trans_pcie_op_mode_leave,
2733 .fw_alive = iwl_trans_pcie_fw_alive,
2734 .start_fw = iwl_trans_pcie_start_fw,
2735 .stop_device = iwl_trans_pcie_stop_device,
2736
2737 .d3_suspend = iwl_trans_pcie_d3_suspend,
2738 .d3_resume = iwl_trans_pcie_d3_resume,
2739
2740 #ifdef CONFIG_PM_SLEEP
2741 .suspend = iwl_trans_pcie_suspend,
2742 .resume = iwl_trans_pcie_resume,
2743 #endif /* CONFIG_PM_SLEEP */
2744
2745 .send_cmd = iwl_trans_pcie_send_hcmd,
2746
2747 .tx = iwl_trans_pcie_tx,
2748 .reclaim = iwl_trans_pcie_reclaim,
2749
2750 .txq_disable = iwl_trans_pcie_txq_disable,
2751 .txq_enable = iwl_trans_pcie_txq_enable,
2752
2753 .wait_tx_queue_empty = iwl_trans_pcie_wait_txq_empty,
2754 .freeze_txq_timer = iwl_trans_pcie_freeze_txq_timer,
2755 .block_txq_ptrs = iwl_trans_pcie_block_txq_ptrs,
2756
2757 .write8 = iwl_trans_pcie_write8,
2758 .write32 = iwl_trans_pcie_write32,
2759 .read32 = iwl_trans_pcie_read32,
2760 .read_prph = iwl_trans_pcie_read_prph,
2761 .write_prph = iwl_trans_pcie_write_prph,
2762 .read_mem = iwl_trans_pcie_read_mem,
2763 .write_mem = iwl_trans_pcie_write_mem,
2764 .configure = iwl_trans_pcie_configure,
2765 .set_pmi = iwl_trans_pcie_set_pmi,
2766 .grab_nic_access = iwl_trans_pcie_grab_nic_access,
2767 .release_nic_access = iwl_trans_pcie_release_nic_access,
2768 .set_bits_mask = iwl_trans_pcie_set_bits_mask,
2769
2770 .ref = iwl_trans_pcie_ref,
2771 .unref = iwl_trans_pcie_unref,
2772
2773 .dump_data = iwl_trans_pcie_dump_data,
2774 };
2775
2776 struct iwl_trans *iwl_trans_pcie_alloc(struct pci_dev *pdev,
2777 const struct pci_device_id *ent,
2778 const struct iwl_cfg *cfg)
2779 {
2780 struct iwl_trans_pcie *trans_pcie;
2781 struct iwl_trans *trans;
2782 int ret, addr_size;
2783
2784 trans = iwl_trans_alloc(sizeof(struct iwl_trans_pcie),
2785 &pdev->dev, cfg, &trans_ops_pcie, 0);
2786 if (!trans)
2787 return ERR_PTR(-ENOMEM);
2788
2789 trans->max_skb_frags = IWL_PCIE_MAX_FRAGS;
2790
2791 trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2792
2793 trans_pcie->trans = trans;
2794 spin_lock_init(&trans_pcie->irq_lock);
2795 spin_lock_init(&trans_pcie->reg_lock);
2796 spin_lock_init(&trans_pcie->ref_lock);
2797 mutex_init(&trans_pcie->mutex);
2798 init_waitqueue_head(&trans_pcie->ucode_write_waitq);
2799 trans_pcie->tso_hdr_page = alloc_percpu(struct iwl_tso_hdr_page);
2800 if (!trans_pcie->tso_hdr_page) {
2801 ret = -ENOMEM;
2802 goto out_no_pci;
2803 }
2804
2805 ret = pci_enable_device(pdev);
2806 if (ret)
2807 goto out_no_pci;
2808
2809 if (!cfg->base_params->pcie_l1_allowed) {
2810 /*
2811 * W/A - seems to solve weird behavior. We need to remove this
2812 * if we don't want to stay in L1 all the time. This wastes a
2813 * lot of power.
2814 */
2815 pci_disable_link_state(pdev, PCIE_LINK_STATE_L0S |
2816 PCIE_LINK_STATE_L1 |
2817 PCIE_LINK_STATE_CLKPM);
2818 }
2819
2820 if (cfg->mq_rx_supported)
2821 addr_size = 64;
2822 else
2823 addr_size = 36;
2824
2825 pci_set_master(pdev);
2826
2827 ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(addr_size));
2828 if (!ret)
2829 ret = pci_set_consistent_dma_mask(pdev,
2830 DMA_BIT_MASK(addr_size));
2831 if (ret) {
2832 ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
2833 if (!ret)
2834 ret = pci_set_consistent_dma_mask(pdev,
2835 DMA_BIT_MASK(32));
2836 /* both attempts failed: */
2837 if (ret) {
2838 dev_err(&pdev->dev, "No suitable DMA available\n");
2839 goto out_pci_disable_device;
2840 }
2841 }
2842
2843 ret = pci_request_regions(pdev, DRV_NAME);
2844 if (ret) {
2845 dev_err(&pdev->dev, "pci_request_regions failed\n");
2846 goto out_pci_disable_device;
2847 }
2848
2849 trans_pcie->hw_base = pci_ioremap_bar(pdev, 0);
2850 if (!trans_pcie->hw_base) {
2851 dev_err(&pdev->dev, "pci_ioremap_bar failed\n");
2852 ret = -ENODEV;
2853 goto out_pci_release_regions;
2854 }
2855
2856 /* We disable the RETRY_TIMEOUT register (0x41) to keep
2857 * PCI Tx retries from interfering with C3 CPU state */
2858 pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
2859
2860 trans->dev = &pdev->dev;
2861 trans_pcie->pci_dev = pdev;
2862 iwl_disable_interrupts(trans);
2863
2864 trans->hw_rev = iwl_read32(trans, CSR_HW_REV);
2865 /*
2866 * In the 8000 HW family the format of the 4 bytes of CSR_HW_REV have
2867 * changed, and now the revision step also includes bit 0-1 (no more
2868 * "dash" value). To keep hw_rev backwards compatible - we'll store it
2869 * in the old format.
2870 */
2871 if (trans->cfg->device_family == IWL_DEVICE_FAMILY_8000) {
2872 unsigned long flags;
2873
2874 trans->hw_rev = (trans->hw_rev & 0xfff0) |
2875 (CSR_HW_REV_STEP(trans->hw_rev << 2) << 2);
2876
2877 ret = iwl_pcie_prepare_card_hw(trans);
2878 if (ret) {
2879 IWL_WARN(trans, "Exit HW not ready\n");
2880 goto out_pci_disable_msi;
2881 }
2882
2883 /*
2884 * in-order to recognize C step driver should read chip version
2885 * id located at the AUX bus MISC address space.
2886 */
2887 iwl_set_bit(trans, CSR_GP_CNTRL,
2888 CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
2889 udelay(2);
2890
2891 ret = iwl_poll_bit(trans, CSR_GP_CNTRL,
2892 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
2893 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
2894 25000);
2895 if (ret < 0) {
2896 IWL_DEBUG_INFO(trans, "Failed to wake up the nic\n");
2897 goto out_pci_disable_msi;
2898 }
2899
2900 if (iwl_trans_grab_nic_access(trans, &flags)) {
2901 u32 hw_step;
2902
2903 hw_step = iwl_read_prph_no_grab(trans, WFPM_CTRL_REG);
2904 hw_step |= ENABLE_WFPM;
2905 iwl_write_prph_no_grab(trans, WFPM_CTRL_REG, hw_step);
2906 hw_step = iwl_read_prph_no_grab(trans, AUX_MISC_REG);
2907 hw_step = (hw_step >> HW_STEP_LOCATION_BITS) & 0xF;
2908 if (hw_step == 0x3)
2909 trans->hw_rev = (trans->hw_rev & 0xFFFFFFF3) |
2910 (SILICON_C_STEP << 2);
2911 iwl_trans_release_nic_access(trans, &flags);
2912 }
2913 }
2914
2915 iwl_pcie_set_interrupt_capa(pdev, trans);
2916 trans->hw_id = (pdev->device << 16) + pdev->subsystem_device;
2917 snprintf(trans->hw_id_str, sizeof(trans->hw_id_str),
2918 "PCI ID: 0x%04X:0x%04X", pdev->device, pdev->subsystem_device);
2919
2920 /* Initialize the wait queue for commands */
2921 init_waitqueue_head(&trans_pcie->wait_command_queue);
2922
2923 init_waitqueue_head(&trans_pcie->d0i3_waitq);
2924
2925 if (trans_pcie->msix_enabled) {
2926 if (iwl_pcie_init_msix_handler(pdev, trans_pcie))
2927 goto out_pci_release_regions;
2928 } else {
2929 ret = iwl_pcie_alloc_ict(trans);
2930 if (ret)
2931 goto out_pci_disable_msi;
2932
2933 ret = request_threaded_irq(pdev->irq, iwl_pcie_isr,
2934 iwl_pcie_irq_handler,
2935 IRQF_SHARED, DRV_NAME, trans);
2936 if (ret) {
2937 IWL_ERR(trans, "Error allocating IRQ %d\n", pdev->irq);
2938 goto out_free_ict;
2939 }
2940 trans_pcie->inta_mask = CSR_INI_SET_MASK;
2941 }
2942
2943 #ifdef CONFIG_IWLWIFI_PCIE_RTPM
2944 trans->runtime_pm_mode = IWL_PLAT_PM_MODE_D0I3;
2945 #else
2946 trans->runtime_pm_mode = IWL_PLAT_PM_MODE_DISABLED;
2947 #endif /* CONFIG_IWLWIFI_PCIE_RTPM */
2948
2949 return trans;
2950
2951 out_free_ict:
2952 iwl_pcie_free_ict(trans);
2953 out_pci_disable_msi:
2954 pci_disable_msi(pdev);
2955 out_pci_release_regions:
2956 pci_release_regions(pdev);
2957 out_pci_disable_device:
2958 pci_disable_device(pdev);
2959 out_no_pci:
2960 free_percpu(trans_pcie->tso_hdr_page);
2961 iwl_trans_free(trans);
2962 return ERR_PTR(ret);
2963 }
Linux kernel - Deliverables
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