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ipmi: remove trydefaults parameter and default init
[mirror_ubuntu-artful-kernel.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)
273 iwl_set_bit(trans, CSR_ANA_PLL_CFG, CSR50_ANA_PLL_CFG_VAL);
274
275 /*
276 * Set "initialization complete" bit to move adapter from
277 * D0U* --> D0A* (powered-up active) state.
278 */
279 iwl_set_bit(trans, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
280
281 /*
282 * Wait for clock stabilization; once stabilized, access to
283 * device-internal resources is supported, e.g. iwl_write_prph()
284 * and accesses to uCode SRAM.
285 */
286 ret = iwl_poll_bit(trans, CSR_GP_CNTRL,
287 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
288 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
289 if (ret < 0) {
290 IWL_DEBUG_INFO(trans, "Failed to init the card\n");
291 goto out;
292 }
293
294 if (trans->cfg->host_interrupt_operation_mode) {
295 /*
296 * This is a bit of an abuse - This is needed for 7260 / 3160
297 * only check host_interrupt_operation_mode even if this is
298 * not related to host_interrupt_operation_mode.
299 *
300 * Enable the oscillator to count wake up time for L1 exit. This
301 * consumes slightly more power (100uA) - but allows to be sure
302 * that we wake up from L1 on time.
303 *
304 * This looks weird: read twice the same register, discard the
305 * value, set a bit, and yet again, read that same register
306 * just to discard the value. But that's the way the hardware
307 * seems to like it.
308 */
309 iwl_read_prph(trans, OSC_CLK);
310 iwl_read_prph(trans, OSC_CLK);
311 iwl_set_bits_prph(trans, OSC_CLK, OSC_CLK_FORCE_CONTROL);
312 iwl_read_prph(trans, OSC_CLK);
313 iwl_read_prph(trans, OSC_CLK);
314 }
315
316 /*
317 * Enable DMA clock and wait for it to stabilize.
318 *
319 * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0"
320 * bits do not disable clocks. This preserves any hardware
321 * bits already set by default in "CLK_CTRL_REG" after reset.
322 */
323 if (!trans->cfg->apmg_not_supported) {
324 iwl_write_prph(trans, APMG_CLK_EN_REG,
325 APMG_CLK_VAL_DMA_CLK_RQT);
326 udelay(20);
327
328 /* Disable L1-Active */
329 iwl_set_bits_prph(trans, APMG_PCIDEV_STT_REG,
330 APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
331
332 /* Clear the interrupt in APMG if the NIC is in RFKILL */
333 iwl_write_prph(trans, APMG_RTC_INT_STT_REG,
334 APMG_RTC_INT_STT_RFKILL);
335 }
336
337 set_bit(STATUS_DEVICE_ENABLED, &trans->status);
338
339 out:
340 return ret;
341 }
342
343 /*
344 * Enable LP XTAL to avoid HW bug where device may consume much power if
345 * FW is not loaded after device reset. LP XTAL is disabled by default
346 * after device HW reset. Do it only if XTAL is fed by internal source.
347 * Configure device's "persistence" mode to avoid resetting XTAL again when
348 * SHRD_HW_RST occurs in S3.
349 */
350 static void iwl_pcie_apm_lp_xtal_enable(struct iwl_trans *trans)
351 {
352 int ret;
353 u32 apmg_gp1_reg;
354 u32 apmg_xtal_cfg_reg;
355 u32 dl_cfg_reg;
356
357 /* Force XTAL ON */
358 __iwl_trans_pcie_set_bit(trans, CSR_GP_CNTRL,
359 CSR_GP_CNTRL_REG_FLAG_XTAL_ON);
360
361 /* Reset entire device - do controller reset (results in SHRD_HW_RST) */
362 iwl_set_bit(trans, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
363 usleep_range(1000, 2000);
364
365 /*
366 * Set "initialization complete" bit to move adapter from
367 * D0U* --> D0A* (powered-up active) state.
368 */
369 iwl_set_bit(trans, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
370
371 /*
372 * Wait for clock stabilization; once stabilized, access to
373 * device-internal resources is possible.
374 */
375 ret = iwl_poll_bit(trans, CSR_GP_CNTRL,
376 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
377 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
378 25000);
379 if (WARN_ON(ret < 0)) {
380 IWL_ERR(trans, "Access time out - failed to enable LP XTAL\n");
381 /* Release XTAL ON request */
382 __iwl_trans_pcie_clear_bit(trans, CSR_GP_CNTRL,
383 CSR_GP_CNTRL_REG_FLAG_XTAL_ON);
384 return;
385 }
386
387 /*
388 * Clear "disable persistence" to avoid LP XTAL resetting when
389 * SHRD_HW_RST is applied in S3.
390 */
391 iwl_clear_bits_prph(trans, APMG_PCIDEV_STT_REG,
392 APMG_PCIDEV_STT_VAL_PERSIST_DIS);
393
394 /*
395 * Force APMG XTAL to be active to prevent its disabling by HW
396 * caused by APMG idle state.
397 */
398 apmg_xtal_cfg_reg = iwl_trans_pcie_read_shr(trans,
399 SHR_APMG_XTAL_CFG_REG);
400 iwl_trans_pcie_write_shr(trans, SHR_APMG_XTAL_CFG_REG,
401 apmg_xtal_cfg_reg |
402 SHR_APMG_XTAL_CFG_XTAL_ON_REQ);
403
404 /*
405 * Reset entire device again - do controller reset (results in
406 * SHRD_HW_RST). Turn MAC off before proceeding.
407 */
408 iwl_set_bit(trans, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
409 usleep_range(1000, 2000);
410
411 /* Enable LP XTAL by indirect access through CSR */
412 apmg_gp1_reg = iwl_trans_pcie_read_shr(trans, SHR_APMG_GP1_REG);
413 iwl_trans_pcie_write_shr(trans, SHR_APMG_GP1_REG, apmg_gp1_reg |
414 SHR_APMG_GP1_WF_XTAL_LP_EN |
415 SHR_APMG_GP1_CHICKEN_BIT_SELECT);
416
417 /* Clear delay line clock power up */
418 dl_cfg_reg = iwl_trans_pcie_read_shr(trans, SHR_APMG_DL_CFG_REG);
419 iwl_trans_pcie_write_shr(trans, SHR_APMG_DL_CFG_REG, dl_cfg_reg &
420 ~SHR_APMG_DL_CFG_DL_CLOCK_POWER_UP);
421
422 /*
423 * Enable persistence mode to avoid LP XTAL resetting when
424 * SHRD_HW_RST is applied in S3.
425 */
426 iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG,
427 CSR_HW_IF_CONFIG_REG_PERSIST_MODE);
428
429 /*
430 * Clear "initialization complete" bit to move adapter from
431 * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
432 */
433 iwl_clear_bit(trans, CSR_GP_CNTRL,
434 CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
435
436 /* Activates XTAL resources monitor */
437 __iwl_trans_pcie_set_bit(trans, CSR_MONITOR_CFG_REG,
438 CSR_MONITOR_XTAL_RESOURCES);
439
440 /* Release XTAL ON request */
441 __iwl_trans_pcie_clear_bit(trans, CSR_GP_CNTRL,
442 CSR_GP_CNTRL_REG_FLAG_XTAL_ON);
443 udelay(10);
444
445 /* Release APMG XTAL */
446 iwl_trans_pcie_write_shr(trans, SHR_APMG_XTAL_CFG_REG,
447 apmg_xtal_cfg_reg &
448 ~SHR_APMG_XTAL_CFG_XTAL_ON_REQ);
449 }
450
451 static int iwl_pcie_apm_stop_master(struct iwl_trans *trans)
452 {
453 int ret = 0;
454
455 /* stop device's busmaster DMA activity */
456 iwl_set_bit(trans, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
457
458 ret = iwl_poll_bit(trans, CSR_RESET,
459 CSR_RESET_REG_FLAG_MASTER_DISABLED,
460 CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
461 if (ret < 0)
462 IWL_WARN(trans, "Master Disable Timed Out, 100 usec\n");
463
464 IWL_DEBUG_INFO(trans, "stop master\n");
465
466 return ret;
467 }
468
469 static void iwl_pcie_apm_stop(struct iwl_trans *trans, bool op_mode_leave)
470 {
471 IWL_DEBUG_INFO(trans, "Stop card, put in low power state\n");
472
473 if (op_mode_leave) {
474 if (!test_bit(STATUS_DEVICE_ENABLED, &trans->status))
475 iwl_pcie_apm_init(trans);
476
477 /* inform ME that we are leaving */
478 if (trans->cfg->device_family == IWL_DEVICE_FAMILY_7000)
479 iwl_set_bits_prph(trans, APMG_PCIDEV_STT_REG,
480 APMG_PCIDEV_STT_VAL_WAKE_ME);
481 else if (trans->cfg->device_family == IWL_DEVICE_FAMILY_8000) {
482 iwl_set_bit(trans, CSR_DBG_LINK_PWR_MGMT_REG,
483 CSR_RESET_LINK_PWR_MGMT_DISABLED);
484 iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG,
485 CSR_HW_IF_CONFIG_REG_PREPARE |
486 CSR_HW_IF_CONFIG_REG_ENABLE_PME);
487 mdelay(1);
488 iwl_clear_bit(trans, CSR_DBG_LINK_PWR_MGMT_REG,
489 CSR_RESET_LINK_PWR_MGMT_DISABLED);
490 }
491 mdelay(5);
492 }
493
494 clear_bit(STATUS_DEVICE_ENABLED, &trans->status);
495
496 /* Stop device's DMA activity */
497 iwl_pcie_apm_stop_master(trans);
498
499 if (trans->cfg->lp_xtal_workaround) {
500 iwl_pcie_apm_lp_xtal_enable(trans);
501 return;
502 }
503
504 /* Reset the entire device */
505 iwl_set_bit(trans, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
506 usleep_range(1000, 2000);
507
508 /*
509 * Clear "initialization complete" bit to move adapter from
510 * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
511 */
512 iwl_clear_bit(trans, CSR_GP_CNTRL,
513 CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
514 }
515
516 static int iwl_pcie_nic_init(struct iwl_trans *trans)
517 {
518 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
519
520 /* nic_init */
521 spin_lock(&trans_pcie->irq_lock);
522 iwl_pcie_apm_init(trans);
523
524 spin_unlock(&trans_pcie->irq_lock);
525
526 iwl_pcie_set_pwr(trans, false);
527
528 iwl_op_mode_nic_config(trans->op_mode);
529
530 /* Allocate the RX queue, or reset if it is already allocated */
531 iwl_pcie_rx_init(trans);
532
533 /* Allocate or reset and init all Tx and Command queues */
534 if (iwl_pcie_tx_init(trans))
535 return -ENOMEM;
536
537 if (trans->cfg->base_params->shadow_reg_enable) {
538 /* enable shadow regs in HW */
539 iwl_set_bit(trans, CSR_MAC_SHADOW_REG_CTRL, 0x800FFFFF);
540 IWL_DEBUG_INFO(trans, "Enabling shadow registers in device\n");
541 }
542
543 return 0;
544 }
545
546 #define HW_READY_TIMEOUT (50)
547
548 /* Note: returns poll_bit return value, which is >= 0 if success */
549 static int iwl_pcie_set_hw_ready(struct iwl_trans *trans)
550 {
551 int ret;
552
553 iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG,
554 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY);
555
556 /* See if we got it */
557 ret = iwl_poll_bit(trans, CSR_HW_IF_CONFIG_REG,
558 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
559 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
560 HW_READY_TIMEOUT);
561
562 if (ret >= 0)
563 iwl_set_bit(trans, CSR_MBOX_SET_REG, CSR_MBOX_SET_REG_OS_ALIVE);
564
565 IWL_DEBUG_INFO(trans, "hardware%s ready\n", ret < 0 ? " not" : "");
566 return ret;
567 }
568
569 /* Note: returns standard 0/-ERROR code */
570 static int iwl_pcie_prepare_card_hw(struct iwl_trans *trans)
571 {
572 int ret;
573 int t = 0;
574 int iter;
575
576 IWL_DEBUG_INFO(trans, "iwl_trans_prepare_card_hw enter\n");
577
578 ret = iwl_pcie_set_hw_ready(trans);
579 /* If the card is ready, exit 0 */
580 if (ret >= 0)
581 return 0;
582
583 iwl_set_bit(trans, CSR_DBG_LINK_PWR_MGMT_REG,
584 CSR_RESET_LINK_PWR_MGMT_DISABLED);
585 usleep_range(1000, 2000);
586
587 for (iter = 0; iter < 10; iter++) {
588 /* If HW is not ready, prepare the conditions to check again */
589 iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG,
590 CSR_HW_IF_CONFIG_REG_PREPARE);
591
592 do {
593 ret = iwl_pcie_set_hw_ready(trans);
594 if (ret >= 0)
595 return 0;
596
597 usleep_range(200, 1000);
598 t += 200;
599 } while (t < 150000);
600 msleep(25);
601 }
602
603 IWL_ERR(trans, "Couldn't prepare the card\n");
604
605 return ret;
606 }
607
608 /*
609 * ucode
610 */
611 static int iwl_pcie_load_firmware_chunk(struct iwl_trans *trans, u32 dst_addr,
612 dma_addr_t phy_addr, u32 byte_cnt)
613 {
614 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
615 unsigned long flags;
616 int ret;
617
618 trans_pcie->ucode_write_complete = false;
619
620 if (!iwl_trans_grab_nic_access(trans, &flags))
621 return -EIO;
622
623 iwl_write32(trans, FH_TCSR_CHNL_TX_CONFIG_REG(FH_SRVC_CHNL),
624 FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_PAUSE);
625
626 iwl_write32(trans, FH_SRVC_CHNL_SRAM_ADDR_REG(FH_SRVC_CHNL),
627 dst_addr);
628
629 iwl_write32(trans, FH_TFDIB_CTRL0_REG(FH_SRVC_CHNL),
630 phy_addr & FH_MEM_TFDIB_DRAM_ADDR_LSB_MSK);
631
632 iwl_write32(trans, FH_TFDIB_CTRL1_REG(FH_SRVC_CHNL),
633 (iwl_get_dma_hi_addr(phy_addr)
634 << FH_MEM_TFDIB_REG1_ADDR_BITSHIFT) | byte_cnt);
635
636 iwl_write32(trans, FH_TCSR_CHNL_TX_BUF_STS_REG(FH_SRVC_CHNL),
637 BIT(FH_TCSR_CHNL_TX_BUF_STS_REG_POS_TB_NUM) |
638 BIT(FH_TCSR_CHNL_TX_BUF_STS_REG_POS_TB_IDX) |
639 FH_TCSR_CHNL_TX_BUF_STS_REG_VAL_TFDB_VALID);
640
641 iwl_write32(trans, FH_TCSR_CHNL_TX_CONFIG_REG(FH_SRVC_CHNL),
642 FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE |
643 FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_DISABLE |
644 FH_TCSR_TX_CONFIG_REG_VAL_CIRQ_HOST_ENDTFD);
645
646 iwl_trans_release_nic_access(trans, &flags);
647
648 ret = wait_event_timeout(trans_pcie->ucode_write_waitq,
649 trans_pcie->ucode_write_complete, 5 * HZ);
650 if (!ret) {
651 IWL_ERR(trans, "Failed to load firmware chunk!\n");
652 return -ETIMEDOUT;
653 }
654
655 return 0;
656 }
657
658 static int iwl_pcie_load_section(struct iwl_trans *trans, u8 section_num,
659 const struct fw_desc *section)
660 {
661 u8 *v_addr;
662 dma_addr_t p_addr;
663 u32 offset, chunk_sz = min_t(u32, FH_MEM_TB_MAX_LENGTH, section->len);
664 int ret = 0;
665
666 IWL_DEBUG_FW(trans, "[%d] uCode section being loaded...\n",
667 section_num);
668
669 v_addr = dma_alloc_coherent(trans->dev, chunk_sz, &p_addr,
670 GFP_KERNEL | __GFP_NOWARN);
671 if (!v_addr) {
672 IWL_DEBUG_INFO(trans, "Falling back to small chunks of DMA\n");
673 chunk_sz = PAGE_SIZE;
674 v_addr = dma_alloc_coherent(trans->dev, chunk_sz,
675 &p_addr, GFP_KERNEL);
676 if (!v_addr)
677 return -ENOMEM;
678 }
679
680 for (offset = 0; offset < section->len; offset += chunk_sz) {
681 u32 copy_size, dst_addr;
682 bool extended_addr = false;
683
684 copy_size = min_t(u32, chunk_sz, section->len - offset);
685 dst_addr = section->offset + offset;
686
687 if (dst_addr >= IWL_FW_MEM_EXTENDED_START &&
688 dst_addr <= IWL_FW_MEM_EXTENDED_END)
689 extended_addr = true;
690
691 if (extended_addr)
692 iwl_set_bits_prph(trans, LMPM_CHICK,
693 LMPM_CHICK_EXTENDED_ADDR_SPACE);
694
695 memcpy(v_addr, (u8 *)section->data + offset, copy_size);
696 ret = iwl_pcie_load_firmware_chunk(trans, dst_addr, p_addr,
697 copy_size);
698
699 if (extended_addr)
700 iwl_clear_bits_prph(trans, LMPM_CHICK,
701 LMPM_CHICK_EXTENDED_ADDR_SPACE);
702
703 if (ret) {
704 IWL_ERR(trans,
705 "Could not load the [%d] uCode section\n",
706 section_num);
707 break;
708 }
709 }
710
711 dma_free_coherent(trans->dev, chunk_sz, v_addr, p_addr);
712 return ret;
713 }
714
715 /*
716 * Driver Takes the ownership on secure machine before FW load
717 * and prevent race with the BT load.
718 * W/A for ROM bug. (should be remove in the next Si step)
719 */
720 static int iwl_pcie_rsa_race_bug_wa(struct iwl_trans *trans)
721 {
722 u32 val, loop = 1000;
723
724 /*
725 * Check the RSA semaphore is accessible.
726 * If the HW isn't locked and the rsa semaphore isn't accessible,
727 * we are in trouble.
728 */
729 val = iwl_read_prph(trans, PREG_AUX_BUS_WPROT_0);
730 if (val & (BIT(1) | BIT(17))) {
731 IWL_DEBUG_INFO(trans,
732 "can't access the RSA semaphore it is write protected\n");
733 return 0;
734 }
735
736 /* take ownership on the AUX IF */
737 iwl_write_prph(trans, WFPM_CTRL_REG, WFPM_AUX_CTL_AUX_IF_MAC_OWNER_MSK);
738 iwl_write_prph(trans, AUX_MISC_MASTER1_EN, AUX_MISC_MASTER1_EN_SBE_MSK);
739
740 do {
741 iwl_write_prph(trans, AUX_MISC_MASTER1_SMPHR_STATUS, 0x1);
742 val = iwl_read_prph(trans, AUX_MISC_MASTER1_SMPHR_STATUS);
743 if (val == 0x1) {
744 iwl_write_prph(trans, RSA_ENABLE, 0);
745 return 0;
746 }
747
748 udelay(10);
749 loop--;
750 } while (loop > 0);
751
752 IWL_ERR(trans, "Failed to take ownership on secure machine\n");
753 return -EIO;
754 }
755
756 static int iwl_pcie_load_cpu_sections_8000(struct iwl_trans *trans,
757 const struct fw_img *image,
758 int cpu,
759 int *first_ucode_section)
760 {
761 int shift_param;
762 int i, ret = 0, sec_num = 0x1;
763 u32 val, last_read_idx = 0;
764
765 if (cpu == 1) {
766 shift_param = 0;
767 *first_ucode_section = 0;
768 } else {
769 shift_param = 16;
770 (*first_ucode_section)++;
771 }
772
773 for (i = *first_ucode_section; i < IWL_UCODE_SECTION_MAX; i++) {
774 last_read_idx = i;
775
776 /*
777 * CPU1_CPU2_SEPARATOR_SECTION delimiter - separate between
778 * CPU1 to CPU2.
779 * PAGING_SEPARATOR_SECTION delimiter - separate between
780 * CPU2 non paged to CPU2 paging sec.
781 */
782 if (!image->sec[i].data ||
783 image->sec[i].offset == CPU1_CPU2_SEPARATOR_SECTION ||
784 image->sec[i].offset == PAGING_SEPARATOR_SECTION) {
785 IWL_DEBUG_FW(trans,
786 "Break since Data not valid or Empty section, sec = %d\n",
787 i);
788 break;
789 }
790
791 ret = iwl_pcie_load_section(trans, i, &image->sec[i]);
792 if (ret)
793 return ret;
794
795 /* Notify the ucode of the loaded section number and status */
796 val = iwl_read_direct32(trans, FH_UCODE_LOAD_STATUS);
797 val = val | (sec_num << shift_param);
798 iwl_write_direct32(trans, FH_UCODE_LOAD_STATUS, val);
799 sec_num = (sec_num << 1) | 0x1;
800 }
801
802 *first_ucode_section = last_read_idx;
803
804 if (cpu == 1)
805 iwl_write_direct32(trans, FH_UCODE_LOAD_STATUS, 0xFFFF);
806 else
807 iwl_write_direct32(trans, FH_UCODE_LOAD_STATUS, 0xFFFFFFFF);
808
809 return 0;
810 }
811
812 static int iwl_pcie_load_cpu_sections(struct iwl_trans *trans,
813 const struct fw_img *image,
814 int cpu,
815 int *first_ucode_section)
816 {
817 int shift_param;
818 int i, ret = 0;
819 u32 last_read_idx = 0;
820
821 if (cpu == 1) {
822 shift_param = 0;
823 *first_ucode_section = 0;
824 } else {
825 shift_param = 16;
826 (*first_ucode_section)++;
827 }
828
829 for (i = *first_ucode_section; i < IWL_UCODE_SECTION_MAX; i++) {
830 last_read_idx = i;
831
832 /*
833 * CPU1_CPU2_SEPARATOR_SECTION delimiter - separate between
834 * CPU1 to CPU2.
835 * PAGING_SEPARATOR_SECTION delimiter - separate between
836 * CPU2 non paged to CPU2 paging sec.
837 */
838 if (!image->sec[i].data ||
839 image->sec[i].offset == CPU1_CPU2_SEPARATOR_SECTION ||
840 image->sec[i].offset == PAGING_SEPARATOR_SECTION) {
841 IWL_DEBUG_FW(trans,
842 "Break since Data not valid or Empty section, sec = %d\n",
843 i);
844 break;
845 }
846
847 ret = iwl_pcie_load_section(trans, i, &image->sec[i]);
848 if (ret)
849 return ret;
850 }
851
852 if (trans->cfg->device_family == IWL_DEVICE_FAMILY_8000)
853 iwl_set_bits_prph(trans,
854 CSR_UCODE_LOAD_STATUS_ADDR,
855 (LMPM_CPU_UCODE_LOADING_COMPLETED |
856 LMPM_CPU_HDRS_LOADING_COMPLETED |
857 LMPM_CPU_UCODE_LOADING_STARTED) <<
858 shift_param);
859
860 *first_ucode_section = last_read_idx;
861
862 return 0;
863 }
864
865 static void iwl_pcie_apply_destination(struct iwl_trans *trans)
866 {
867 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
868 const struct iwl_fw_dbg_dest_tlv *dest = trans->dbg_dest_tlv;
869 int i;
870
871 if (dest->version)
872 IWL_ERR(trans,
873 "DBG DEST version is %d - expect issues\n",
874 dest->version);
875
876 IWL_INFO(trans, "Applying debug destination %s\n",
877 get_fw_dbg_mode_string(dest->monitor_mode));
878
879 if (dest->monitor_mode == EXTERNAL_MODE)
880 iwl_pcie_alloc_fw_monitor(trans, dest->size_power);
881 else
882 IWL_WARN(trans, "PCI should have external buffer debug\n");
883
884 for (i = 0; i < trans->dbg_dest_reg_num; i++) {
885 u32 addr = le32_to_cpu(dest->reg_ops[i].addr);
886 u32 val = le32_to_cpu(dest->reg_ops[i].val);
887
888 switch (dest->reg_ops[i].op) {
889 case CSR_ASSIGN:
890 iwl_write32(trans, addr, val);
891 break;
892 case CSR_SETBIT:
893 iwl_set_bit(trans, addr, BIT(val));
894 break;
895 case CSR_CLEARBIT:
896 iwl_clear_bit(trans, addr, BIT(val));
897 break;
898 case PRPH_ASSIGN:
899 iwl_write_prph(trans, addr, val);
900 break;
901 case PRPH_SETBIT:
902 iwl_set_bits_prph(trans, addr, BIT(val));
903 break;
904 case PRPH_CLEARBIT:
905 iwl_clear_bits_prph(trans, addr, BIT(val));
906 break;
907 case PRPH_BLOCKBIT:
908 if (iwl_read_prph(trans, addr) & BIT(val)) {
909 IWL_ERR(trans,
910 "BIT(%u) in address 0x%x is 1, stopping FW configuration\n",
911 val, addr);
912 goto monitor;
913 }
914 break;
915 default:
916 IWL_ERR(trans, "FW debug - unknown OP %d\n",
917 dest->reg_ops[i].op);
918 break;
919 }
920 }
921
922 monitor:
923 if (dest->monitor_mode == EXTERNAL_MODE && trans_pcie->fw_mon_size) {
924 iwl_write_prph(trans, le32_to_cpu(dest->base_reg),
925 trans_pcie->fw_mon_phys >> dest->base_shift);
926 if (trans->cfg->device_family == IWL_DEVICE_FAMILY_8000)
927 iwl_write_prph(trans, le32_to_cpu(dest->end_reg),
928 (trans_pcie->fw_mon_phys +
929 trans_pcie->fw_mon_size - 256) >>
930 dest->end_shift);
931 else
932 iwl_write_prph(trans, le32_to_cpu(dest->end_reg),
933 (trans_pcie->fw_mon_phys +
934 trans_pcie->fw_mon_size) >>
935 dest->end_shift);
936 }
937 }
938
939 static int iwl_pcie_load_given_ucode(struct iwl_trans *trans,
940 const struct fw_img *image)
941 {
942 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
943 int ret = 0;
944 int first_ucode_section;
945
946 IWL_DEBUG_FW(trans, "working with %s CPU\n",
947 image->is_dual_cpus ? "Dual" : "Single");
948
949 /* load to FW the binary non secured sections of CPU1 */
950 ret = iwl_pcie_load_cpu_sections(trans, image, 1, &first_ucode_section);
951 if (ret)
952 return ret;
953
954 if (image->is_dual_cpus) {
955 /* set CPU2 header address */
956 iwl_write_prph(trans,
957 LMPM_SECURE_UCODE_LOAD_CPU2_HDR_ADDR,
958 LMPM_SECURE_CPU2_HDR_MEM_SPACE);
959
960 /* load to FW the binary sections of CPU2 */
961 ret = iwl_pcie_load_cpu_sections(trans, image, 2,
962 &first_ucode_section);
963 if (ret)
964 return ret;
965 }
966
967 /* supported for 7000 only for the moment */
968 if (iwlwifi_mod_params.fw_monitor &&
969 trans->cfg->device_family == IWL_DEVICE_FAMILY_7000) {
970 iwl_pcie_alloc_fw_monitor(trans, 0);
971
972 if (trans_pcie->fw_mon_size) {
973 iwl_write_prph(trans, MON_BUFF_BASE_ADDR,
974 trans_pcie->fw_mon_phys >> 4);
975 iwl_write_prph(trans, MON_BUFF_END_ADDR,
976 (trans_pcie->fw_mon_phys +
977 trans_pcie->fw_mon_size) >> 4);
978 }
979 } else if (trans->dbg_dest_tlv) {
980 iwl_pcie_apply_destination(trans);
981 }
982
983 /* release CPU reset */
984 iwl_write32(trans, CSR_RESET, 0);
985
986 return 0;
987 }
988
989 static int iwl_pcie_load_given_ucode_8000(struct iwl_trans *trans,
990 const struct fw_img *image)
991 {
992 int ret = 0;
993 int first_ucode_section;
994
995 IWL_DEBUG_FW(trans, "working with %s CPU\n",
996 image->is_dual_cpus ? "Dual" : "Single");
997
998 if (trans->dbg_dest_tlv)
999 iwl_pcie_apply_destination(trans);
1000
1001 /* TODO: remove in the next Si step */
1002 ret = iwl_pcie_rsa_race_bug_wa(trans);
1003 if (ret)
1004 return ret;
1005
1006 /* configure the ucode to be ready to get the secured image */
1007 /* release CPU reset */
1008 iwl_write_prph(trans, RELEASE_CPU_RESET, RELEASE_CPU_RESET_BIT);
1009
1010 /* load to FW the binary Secured sections of CPU1 */
1011 ret = iwl_pcie_load_cpu_sections_8000(trans, image, 1,
1012 &first_ucode_section);
1013 if (ret)
1014 return ret;
1015
1016 /* load to FW the binary sections of CPU2 */
1017 return iwl_pcie_load_cpu_sections_8000(trans, image, 2,
1018 &first_ucode_section);
1019 }
1020
1021 static void _iwl_trans_pcie_stop_device(struct iwl_trans *trans, bool low_power)
1022 {
1023 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1024 bool hw_rfkill, was_hw_rfkill;
1025
1026 lockdep_assert_held(&trans_pcie->mutex);
1027
1028 if (trans_pcie->is_down)
1029 return;
1030
1031 trans_pcie->is_down = true;
1032
1033 was_hw_rfkill = iwl_is_rfkill_set(trans);
1034
1035 /* tell the device to stop sending interrupts */
1036 spin_lock(&trans_pcie->irq_lock);
1037 iwl_disable_interrupts(trans);
1038 spin_unlock(&trans_pcie->irq_lock);
1039
1040 /* device going down, Stop using ICT table */
1041 iwl_pcie_disable_ict(trans);
1042
1043 /*
1044 * If a HW restart happens during firmware loading,
1045 * then the firmware loading might call this function
1046 * and later it might be called again due to the
1047 * restart. So don't process again if the device is
1048 * already dead.
1049 */
1050 if (test_and_clear_bit(STATUS_DEVICE_ENABLED, &trans->status)) {
1051 IWL_DEBUG_INFO(trans,
1052 "DEVICE_ENABLED bit was set and is now cleared\n");
1053 iwl_pcie_tx_stop(trans);
1054 iwl_pcie_rx_stop(trans);
1055
1056 /* Power-down device's busmaster DMA clocks */
1057 if (!trans->cfg->apmg_not_supported) {
1058 iwl_write_prph(trans, APMG_CLK_DIS_REG,
1059 APMG_CLK_VAL_DMA_CLK_RQT);
1060 udelay(5);
1061 }
1062 }
1063
1064 /* Make sure (redundant) we've released our request to stay awake */
1065 iwl_clear_bit(trans, CSR_GP_CNTRL,
1066 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
1067
1068 /* Stop the device, and put it in low power state */
1069 iwl_pcie_apm_stop(trans, false);
1070
1071 /* stop and reset the on-board processor */
1072 iwl_write32(trans, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
1073 usleep_range(1000, 2000);
1074
1075 /*
1076 * Upon stop, the APM issues an interrupt if HW RF kill is set.
1077 * This is a bug in certain verions of the hardware.
1078 * Certain devices also keep sending HW RF kill interrupt all
1079 * the time, unless the interrupt is ACKed even if the interrupt
1080 * should be masked. Re-ACK all the interrupts here.
1081 */
1082 spin_lock(&trans_pcie->irq_lock);
1083 iwl_disable_interrupts(trans);
1084 spin_unlock(&trans_pcie->irq_lock);
1085
1086 /* clear all status bits */
1087 clear_bit(STATUS_SYNC_HCMD_ACTIVE, &trans->status);
1088 clear_bit(STATUS_INT_ENABLED, &trans->status);
1089 clear_bit(STATUS_TPOWER_PMI, &trans->status);
1090 clear_bit(STATUS_RFKILL, &trans->status);
1091
1092 /*
1093 * Even if we stop the HW, we still want the RF kill
1094 * interrupt
1095 */
1096 iwl_enable_rfkill_int(trans);
1097
1098 /*
1099 * Check again since the RF kill state may have changed while
1100 * all the interrupts were disabled, in this case we couldn't
1101 * receive the RF kill interrupt and update the state in the
1102 * op_mode.
1103 * Don't call the op_mode if the rkfill state hasn't changed.
1104 * This allows the op_mode to call stop_device from the rfkill
1105 * notification without endless recursion. Under very rare
1106 * circumstances, we might have a small recursion if the rfkill
1107 * state changed exactly now while we were called from stop_device.
1108 * This is very unlikely but can happen and is supported.
1109 */
1110 hw_rfkill = iwl_is_rfkill_set(trans);
1111 if (hw_rfkill)
1112 set_bit(STATUS_RFKILL, &trans->status);
1113 else
1114 clear_bit(STATUS_RFKILL, &trans->status);
1115 if (hw_rfkill != was_hw_rfkill)
1116 iwl_trans_pcie_rf_kill(trans, hw_rfkill);
1117
1118 /* re-take ownership to prevent other users from stealing the device */
1119 iwl_pcie_prepare_card_hw(trans);
1120 }
1121
1122 static void iwl_pcie_synchronize_irqs(struct iwl_trans *trans)
1123 {
1124 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1125
1126 if (trans_pcie->msix_enabled) {
1127 int i;
1128
1129 for (i = 0; i < trans_pcie->allocated_vector; i++)
1130 synchronize_irq(trans_pcie->msix_entries[i].vector);
1131 } else {
1132 synchronize_irq(trans_pcie->pci_dev->irq);
1133 }
1134 }
1135
1136 static int iwl_trans_pcie_start_fw(struct iwl_trans *trans,
1137 const struct fw_img *fw, bool run_in_rfkill)
1138 {
1139 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1140 bool hw_rfkill;
1141 int ret;
1142
1143 /* This may fail if AMT took ownership of the device */
1144 if (iwl_pcie_prepare_card_hw(trans)) {
1145 IWL_WARN(trans, "Exit HW not ready\n");
1146 ret = -EIO;
1147 goto out;
1148 }
1149
1150 iwl_enable_rfkill_int(trans);
1151
1152 iwl_write32(trans, CSR_INT, 0xFFFFFFFF);
1153
1154 /*
1155 * We enabled the RF-Kill interrupt and the handler may very
1156 * well be running. Disable the interrupts to make sure no other
1157 * interrupt can be fired.
1158 */
1159 iwl_disable_interrupts(trans);
1160
1161 /* Make sure it finished running */
1162 iwl_pcie_synchronize_irqs(trans);
1163
1164 mutex_lock(&trans_pcie->mutex);
1165
1166 /* If platform's RF_KILL switch is NOT set to KILL */
1167 hw_rfkill = iwl_is_rfkill_set(trans);
1168 if (hw_rfkill)
1169 set_bit(STATUS_RFKILL, &trans->status);
1170 else
1171 clear_bit(STATUS_RFKILL, &trans->status);
1172 iwl_trans_pcie_rf_kill(trans, hw_rfkill);
1173 if (hw_rfkill && !run_in_rfkill) {
1174 ret = -ERFKILL;
1175 goto out;
1176 }
1177
1178 /* Someone called stop_device, don't try to start_fw */
1179 if (trans_pcie->is_down) {
1180 IWL_WARN(trans,
1181 "Can't start_fw since the HW hasn't been started\n");
1182 ret = -EIO;
1183 goto out;
1184 }
1185
1186 /* make sure rfkill handshake bits are cleared */
1187 iwl_write32(trans, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1188 iwl_write32(trans, CSR_UCODE_DRV_GP1_CLR,
1189 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
1190
1191 /* clear (again), then enable host interrupts */
1192 iwl_write32(trans, CSR_INT, 0xFFFFFFFF);
1193
1194 ret = iwl_pcie_nic_init(trans);
1195 if (ret) {
1196 IWL_ERR(trans, "Unable to init nic\n");
1197 goto out;
1198 }
1199
1200 /*
1201 * Now, we load the firmware and don't want to be interrupted, even
1202 * by the RF-Kill interrupt (hence mask all the interrupt besides the
1203 * FH_TX interrupt which is needed to load the firmware). If the
1204 * RF-Kill switch is toggled, we will find out after having loaded
1205 * the firmware and return the proper value to the caller.
1206 */
1207 iwl_enable_fw_load_int(trans);
1208
1209 /* really make sure rfkill handshake bits are cleared */
1210 iwl_write32(trans, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1211 iwl_write32(trans, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1212
1213 /* Load the given image to the HW */
1214 if (trans->cfg->device_family == IWL_DEVICE_FAMILY_8000)
1215 ret = iwl_pcie_load_given_ucode_8000(trans, fw);
1216 else
1217 ret = iwl_pcie_load_given_ucode(trans, fw);
1218 iwl_enable_interrupts(trans);
1219
1220 /* re-check RF-Kill state since we may have missed the interrupt */
1221 hw_rfkill = iwl_is_rfkill_set(trans);
1222 if (hw_rfkill)
1223 set_bit(STATUS_RFKILL, &trans->status);
1224 else
1225 clear_bit(STATUS_RFKILL, &trans->status);
1226
1227 iwl_trans_pcie_rf_kill(trans, hw_rfkill);
1228 if (hw_rfkill && !run_in_rfkill)
1229 ret = -ERFKILL;
1230
1231 out:
1232 mutex_unlock(&trans_pcie->mutex);
1233 return ret;
1234 }
1235
1236 static void iwl_trans_pcie_fw_alive(struct iwl_trans *trans, u32 scd_addr)
1237 {
1238 iwl_pcie_reset_ict(trans);
1239 iwl_pcie_tx_start(trans, scd_addr);
1240 }
1241
1242 static void iwl_trans_pcie_stop_device(struct iwl_trans *trans, bool low_power)
1243 {
1244 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1245
1246 mutex_lock(&trans_pcie->mutex);
1247 _iwl_trans_pcie_stop_device(trans, low_power);
1248 mutex_unlock(&trans_pcie->mutex);
1249 }
1250
1251 void iwl_trans_pcie_rf_kill(struct iwl_trans *trans, bool state)
1252 {
1253 struct iwl_trans_pcie __maybe_unused *trans_pcie =
1254 IWL_TRANS_GET_PCIE_TRANS(trans);
1255
1256 lockdep_assert_held(&trans_pcie->mutex);
1257
1258 if (iwl_op_mode_hw_rf_kill(trans->op_mode, state))
1259 _iwl_trans_pcie_stop_device(trans, true);
1260 }
1261
1262 static void iwl_trans_pcie_d3_suspend(struct iwl_trans *trans, bool test,
1263 bool reset)
1264 {
1265 if (!reset) {
1266 /* Enable persistence mode to avoid reset */
1267 iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG,
1268 CSR_HW_IF_CONFIG_REG_PERSIST_MODE);
1269 }
1270
1271 iwl_disable_interrupts(trans);
1272
1273 /*
1274 * in testing mode, the host stays awake and the
1275 * hardware won't be reset (not even partially)
1276 */
1277 if (test)
1278 return;
1279
1280 iwl_pcie_disable_ict(trans);
1281
1282 iwl_pcie_synchronize_irqs(trans);
1283
1284 iwl_clear_bit(trans, CSR_GP_CNTRL,
1285 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
1286 iwl_clear_bit(trans, CSR_GP_CNTRL,
1287 CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1288
1289 if (reset) {
1290 /*
1291 * reset TX queues -- some of their registers reset during S3
1292 * so if we don't reset everything here the D3 image would try
1293 * to execute some invalid memory upon resume
1294 */
1295 iwl_trans_pcie_tx_reset(trans);
1296 }
1297
1298 iwl_pcie_set_pwr(trans, true);
1299 }
1300
1301 static int iwl_trans_pcie_d3_resume(struct iwl_trans *trans,
1302 enum iwl_d3_status *status,
1303 bool test, bool reset)
1304 {
1305 u32 val;
1306 int ret;
1307
1308 if (test) {
1309 iwl_enable_interrupts(trans);
1310 *status = IWL_D3_STATUS_ALIVE;
1311 return 0;
1312 }
1313
1314 /*
1315 * Also enables interrupts - none will happen as the device doesn't
1316 * know we're waking it up, only when the opmode actually tells it
1317 * after this call.
1318 */
1319 iwl_pcie_reset_ict(trans);
1320 iwl_enable_interrupts(trans);
1321
1322 iwl_set_bit(trans, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
1323 iwl_set_bit(trans, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1324
1325 if (trans->cfg->device_family == IWL_DEVICE_FAMILY_8000)
1326 udelay(2);
1327
1328 ret = iwl_poll_bit(trans, CSR_GP_CNTRL,
1329 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
1330 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
1331 25000);
1332 if (ret < 0) {
1333 IWL_ERR(trans, "Failed to resume the device (mac ready)\n");
1334 return ret;
1335 }
1336
1337 iwl_pcie_set_pwr(trans, false);
1338
1339 if (!reset) {
1340 iwl_clear_bit(trans, CSR_GP_CNTRL,
1341 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
1342 } else {
1343 iwl_trans_pcie_tx_reset(trans);
1344
1345 ret = iwl_pcie_rx_init(trans);
1346 if (ret) {
1347 IWL_ERR(trans,
1348 "Failed to resume the device (RX reset)\n");
1349 return ret;
1350 }
1351 }
1352
1353 val = iwl_read32(trans, CSR_RESET);
1354 if (val & CSR_RESET_REG_FLAG_NEVO_RESET)
1355 *status = IWL_D3_STATUS_RESET;
1356 else
1357 *status = IWL_D3_STATUS_ALIVE;
1358
1359 return 0;
1360 }
1361
1362 struct iwl_causes_list {
1363 u32 cause_num;
1364 u32 mask_reg;
1365 u8 addr;
1366 };
1367
1368 static struct iwl_causes_list causes_list[] = {
1369 {MSIX_FH_INT_CAUSES_D2S_CH0_NUM, CSR_MSIX_FH_INT_MASK_AD, 0},
1370 {MSIX_FH_INT_CAUSES_D2S_CH1_NUM, CSR_MSIX_FH_INT_MASK_AD, 0x1},
1371 {MSIX_FH_INT_CAUSES_S2D, CSR_MSIX_FH_INT_MASK_AD, 0x3},
1372 {MSIX_FH_INT_CAUSES_FH_ERR, CSR_MSIX_FH_INT_MASK_AD, 0x5},
1373 {MSIX_HW_INT_CAUSES_REG_ALIVE, CSR_MSIX_HW_INT_MASK_AD, 0x10},
1374 {MSIX_HW_INT_CAUSES_REG_WAKEUP, CSR_MSIX_HW_INT_MASK_AD, 0x11},
1375 {MSIX_HW_INT_CAUSES_REG_CT_KILL, CSR_MSIX_HW_INT_MASK_AD, 0x16},
1376 {MSIX_HW_INT_CAUSES_REG_RF_KILL, CSR_MSIX_HW_INT_MASK_AD, 0x17},
1377 {MSIX_HW_INT_CAUSES_REG_PERIODIC, CSR_MSIX_HW_INT_MASK_AD, 0x18},
1378 {MSIX_HW_INT_CAUSES_REG_SW_ERR, CSR_MSIX_HW_INT_MASK_AD, 0x29},
1379 {MSIX_HW_INT_CAUSES_REG_SCD, CSR_MSIX_HW_INT_MASK_AD, 0x2A},
1380 {MSIX_HW_INT_CAUSES_REG_FH_TX, CSR_MSIX_HW_INT_MASK_AD, 0x2B},
1381 {MSIX_HW_INT_CAUSES_REG_HW_ERR, CSR_MSIX_HW_INT_MASK_AD, 0x2D},
1382 {MSIX_HW_INT_CAUSES_REG_HAP, CSR_MSIX_HW_INT_MASK_AD, 0x2E},
1383 };
1384
1385 static void iwl_pcie_init_msix(struct iwl_trans_pcie *trans_pcie)
1386 {
1387 u32 val, max_rx_vector, i;
1388 struct iwl_trans *trans = trans_pcie->trans;
1389
1390 max_rx_vector = trans_pcie->allocated_vector - 1;
1391
1392 if (!trans_pcie->msix_enabled)
1393 return;
1394
1395 iwl_write_prph(trans, UREG_CHICK, UREG_CHICK_MSIX_ENABLE);
1396
1397 /*
1398 * Each cause from the list above and the RX causes is represented as
1399 * a byte in the IVAR table. We access the first (N - 1) bytes and map
1400 * them to the (N - 1) vectors so these vectors will be used as rx
1401 * vectors. Then access all non rx causes and map them to the
1402 * default queue (N'th queue).
1403 */
1404 for (i = 0; i < max_rx_vector; i++) {
1405 iwl_write8(trans, CSR_MSIX_RX_IVAR(i), MSIX_FH_INT_CAUSES_Q(i));
1406 iwl_clear_bit(trans, CSR_MSIX_FH_INT_MASK_AD,
1407 BIT(MSIX_FH_INT_CAUSES_Q(i)));
1408 }
1409
1410 for (i = 0; i < ARRAY_SIZE(causes_list); i++) {
1411 val = trans_pcie->default_irq_num |
1412 MSIX_NON_AUTO_CLEAR_CAUSE;
1413 iwl_write8(trans, CSR_MSIX_IVAR(causes_list[i].addr), val);
1414 iwl_clear_bit(trans, causes_list[i].mask_reg,
1415 causes_list[i].cause_num);
1416 }
1417 trans_pcie->fh_init_mask =
1418 ~iwl_read32(trans, CSR_MSIX_FH_INT_MASK_AD);
1419 trans_pcie->fh_mask = trans_pcie->fh_init_mask;
1420 trans_pcie->hw_init_mask =
1421 ~iwl_read32(trans, CSR_MSIX_HW_INT_MASK_AD);
1422 trans_pcie->hw_mask = trans_pcie->hw_init_mask;
1423 }
1424
1425 static void iwl_pcie_set_interrupt_capa(struct pci_dev *pdev,
1426 struct iwl_trans *trans)
1427 {
1428 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1429 u16 pci_cmd;
1430 int max_vector;
1431 int ret, i;
1432
1433 if (trans->cfg->mq_rx_supported) {
1434 max_vector = min_t(u32, (num_possible_cpus() + 2),
1435 IWL_MAX_RX_HW_QUEUES);
1436 for (i = 0; i < max_vector; i++)
1437 trans_pcie->msix_entries[i].entry = i;
1438
1439 ret = pci_enable_msix_range(pdev, trans_pcie->msix_entries,
1440 MSIX_MIN_INTERRUPT_VECTORS,
1441 max_vector);
1442 if (ret > 1) {
1443 IWL_DEBUG_INFO(trans,
1444 "Enable MSI-X allocate %d interrupt vector\n",
1445 ret);
1446 trans_pcie->allocated_vector = ret;
1447 trans_pcie->default_irq_num =
1448 trans_pcie->allocated_vector - 1;
1449 trans_pcie->trans->num_rx_queues =
1450 trans_pcie->allocated_vector - 1;
1451 trans_pcie->msix_enabled = true;
1452
1453 return;
1454 }
1455 IWL_DEBUG_INFO(trans,
1456 "ret = %d %s move to msi mode\n", ret,
1457 (ret == 1) ?
1458 "can't allocate more than 1 interrupt vector" :
1459 "failed to enable msi-x mode");
1460 pci_disable_msix(pdev);
1461 }
1462
1463 ret = pci_enable_msi(pdev);
1464 if (ret) {
1465 dev_err(&pdev->dev, "pci_enable_msi failed - %d\n", ret);
1466 /* enable rfkill interrupt: hw bug w/a */
1467 pci_read_config_word(pdev, PCI_COMMAND, &pci_cmd);
1468 if (pci_cmd & PCI_COMMAND_INTX_DISABLE) {
1469 pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
1470 pci_write_config_word(pdev, PCI_COMMAND, pci_cmd);
1471 }
1472 }
1473 }
1474
1475 static int iwl_pcie_init_msix_handler(struct pci_dev *pdev,
1476 struct iwl_trans_pcie *trans_pcie)
1477 {
1478 int i, last_vector;
1479
1480 last_vector = trans_pcie->trans->num_rx_queues;
1481
1482 for (i = 0; i < trans_pcie->allocated_vector; i++) {
1483 int ret;
1484
1485 ret = request_threaded_irq(trans_pcie->msix_entries[i].vector,
1486 iwl_pcie_msix_isr,
1487 (i == last_vector) ?
1488 iwl_pcie_irq_msix_handler :
1489 iwl_pcie_irq_rx_msix_handler,
1490 IRQF_SHARED,
1491 DRV_NAME,
1492 &trans_pcie->msix_entries[i]);
1493 if (ret) {
1494 int j;
1495
1496 IWL_ERR(trans_pcie->trans,
1497 "Error allocating IRQ %d\n", i);
1498 for (j = 0; j < i; j++)
1499 free_irq(trans_pcie->msix_entries[j].vector,
1500 &trans_pcie->msix_entries[j]);
1501 pci_disable_msix(pdev);
1502 return ret;
1503 }
1504 }
1505
1506 return 0;
1507 }
1508
1509 static int _iwl_trans_pcie_start_hw(struct iwl_trans *trans, bool low_power)
1510 {
1511 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1512 bool hw_rfkill;
1513 int err;
1514
1515 lockdep_assert_held(&trans_pcie->mutex);
1516
1517 err = iwl_pcie_prepare_card_hw(trans);
1518 if (err) {
1519 IWL_ERR(trans, "Error while preparing HW: %d\n", err);
1520 return err;
1521 }
1522
1523 /* Reset the entire device */
1524 iwl_write32(trans, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
1525 usleep_range(1000, 2000);
1526
1527 iwl_pcie_apm_init(trans);
1528
1529 iwl_pcie_init_msix(trans_pcie);
1530 /* From now on, the op_mode will be kept updated about RF kill state */
1531 iwl_enable_rfkill_int(trans);
1532
1533 /* Set is_down to false here so that...*/
1534 trans_pcie->is_down = false;
1535
1536 hw_rfkill = iwl_is_rfkill_set(trans);
1537 if (hw_rfkill)
1538 set_bit(STATUS_RFKILL, &trans->status);
1539 else
1540 clear_bit(STATUS_RFKILL, &trans->status);
1541 /* ... rfkill can call stop_device and set it false if needed */
1542 iwl_trans_pcie_rf_kill(trans, hw_rfkill);
1543
1544 /* Make sure we sync here, because we'll need full access later */
1545 if (low_power)
1546 pm_runtime_resume(trans->dev);
1547
1548 return 0;
1549 }
1550
1551 static int iwl_trans_pcie_start_hw(struct iwl_trans *trans, bool low_power)
1552 {
1553 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1554 int ret;
1555
1556 mutex_lock(&trans_pcie->mutex);
1557 ret = _iwl_trans_pcie_start_hw(trans, low_power);
1558 mutex_unlock(&trans_pcie->mutex);
1559
1560 return ret;
1561 }
1562
1563 static void iwl_trans_pcie_op_mode_leave(struct iwl_trans *trans)
1564 {
1565 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1566
1567 mutex_lock(&trans_pcie->mutex);
1568
1569 /* disable interrupts - don't enable HW RF kill interrupt */
1570 spin_lock(&trans_pcie->irq_lock);
1571 iwl_disable_interrupts(trans);
1572 spin_unlock(&trans_pcie->irq_lock);
1573
1574 iwl_pcie_apm_stop(trans, true);
1575
1576 spin_lock(&trans_pcie->irq_lock);
1577 iwl_disable_interrupts(trans);
1578 spin_unlock(&trans_pcie->irq_lock);
1579
1580 iwl_pcie_disable_ict(trans);
1581
1582 mutex_unlock(&trans_pcie->mutex);
1583
1584 iwl_pcie_synchronize_irqs(trans);
1585 }
1586
1587 static void iwl_trans_pcie_write8(struct iwl_trans *trans, u32 ofs, u8 val)
1588 {
1589 writeb(val, IWL_TRANS_GET_PCIE_TRANS(trans)->hw_base + ofs);
1590 }
1591
1592 static void iwl_trans_pcie_write32(struct iwl_trans *trans, u32 ofs, u32 val)
1593 {
1594 writel(val, IWL_TRANS_GET_PCIE_TRANS(trans)->hw_base + ofs);
1595 }
1596
1597 static u32 iwl_trans_pcie_read32(struct iwl_trans *trans, u32 ofs)
1598 {
1599 return readl(IWL_TRANS_GET_PCIE_TRANS(trans)->hw_base + ofs);
1600 }
1601
1602 static u32 iwl_trans_pcie_read_prph(struct iwl_trans *trans, u32 reg)
1603 {
1604 iwl_trans_pcie_write32(trans, HBUS_TARG_PRPH_RADDR,
1605 ((reg & 0x000FFFFF) | (3 << 24)));
1606 return iwl_trans_pcie_read32(trans, HBUS_TARG_PRPH_RDAT);
1607 }
1608
1609 static void iwl_trans_pcie_write_prph(struct iwl_trans *trans, u32 addr,
1610 u32 val)
1611 {
1612 iwl_trans_pcie_write32(trans, HBUS_TARG_PRPH_WADDR,
1613 ((addr & 0x000FFFFF) | (3 << 24)));
1614 iwl_trans_pcie_write32(trans, HBUS_TARG_PRPH_WDAT, val);
1615 }
1616
1617 static void iwl_trans_pcie_configure(struct iwl_trans *trans,
1618 const struct iwl_trans_config *trans_cfg)
1619 {
1620 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1621
1622 trans_pcie->cmd_queue = trans_cfg->cmd_queue;
1623 trans_pcie->cmd_fifo = trans_cfg->cmd_fifo;
1624 trans_pcie->cmd_q_wdg_timeout = trans_cfg->cmd_q_wdg_timeout;
1625 if (WARN_ON(trans_cfg->n_no_reclaim_cmds > MAX_NO_RECLAIM_CMDS))
1626 trans_pcie->n_no_reclaim_cmds = 0;
1627 else
1628 trans_pcie->n_no_reclaim_cmds = trans_cfg->n_no_reclaim_cmds;
1629 if (trans_pcie->n_no_reclaim_cmds)
1630 memcpy(trans_pcie->no_reclaim_cmds, trans_cfg->no_reclaim_cmds,
1631 trans_pcie->n_no_reclaim_cmds * sizeof(u8));
1632
1633 trans_pcie->rx_buf_size = trans_cfg->rx_buf_size;
1634 trans_pcie->rx_page_order =
1635 iwl_trans_get_rb_size_order(trans_pcie->rx_buf_size);
1636
1637 trans_pcie->wide_cmd_header = trans_cfg->wide_cmd_header;
1638 trans_pcie->bc_table_dword = trans_cfg->bc_table_dword;
1639 trans_pcie->scd_set_active = trans_cfg->scd_set_active;
1640 trans_pcie->sw_csum_tx = trans_cfg->sw_csum_tx;
1641
1642 trans->command_groups = trans_cfg->command_groups;
1643 trans->command_groups_size = trans_cfg->command_groups_size;
1644
1645 /* Initialize NAPI here - it should be before registering to mac80211
1646 * in the opmode but after the HW struct is allocated.
1647 * As this function may be called again in some corner cases don't
1648 * do anything if NAPI was already initialized.
1649 */
1650 if (trans_pcie->napi_dev.reg_state != NETREG_DUMMY)
1651 init_dummy_netdev(&trans_pcie->napi_dev);
1652 }
1653
1654 void iwl_trans_pcie_free(struct iwl_trans *trans)
1655 {
1656 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1657 int i;
1658
1659 iwl_pcie_synchronize_irqs(trans);
1660
1661 iwl_pcie_tx_free(trans);
1662 iwl_pcie_rx_free(trans);
1663
1664 if (trans_pcie->msix_enabled) {
1665 for (i = 0; i < trans_pcie->allocated_vector; i++)
1666 free_irq(trans_pcie->msix_entries[i].vector,
1667 &trans_pcie->msix_entries[i]);
1668
1669 pci_disable_msix(trans_pcie->pci_dev);
1670 trans_pcie->msix_enabled = false;
1671 } else {
1672 free_irq(trans_pcie->pci_dev->irq, trans);
1673
1674 iwl_pcie_free_ict(trans);
1675
1676 pci_disable_msi(trans_pcie->pci_dev);
1677 }
1678 iounmap(trans_pcie->hw_base);
1679 pci_release_regions(trans_pcie->pci_dev);
1680 pci_disable_device(trans_pcie->pci_dev);
1681
1682 iwl_pcie_free_fw_monitor(trans);
1683
1684 for_each_possible_cpu(i) {
1685 struct iwl_tso_hdr_page *p =
1686 per_cpu_ptr(trans_pcie->tso_hdr_page, i);
1687
1688 if (p->page)
1689 __free_page(p->page);
1690 }
1691
1692 free_percpu(trans_pcie->tso_hdr_page);
1693 mutex_destroy(&trans_pcie->mutex);
1694 iwl_trans_free(trans);
1695 }
1696
1697 static void iwl_trans_pcie_set_pmi(struct iwl_trans *trans, bool state)
1698 {
1699 if (state)
1700 set_bit(STATUS_TPOWER_PMI, &trans->status);
1701 else
1702 clear_bit(STATUS_TPOWER_PMI, &trans->status);
1703 }
1704
1705 static bool iwl_trans_pcie_grab_nic_access(struct iwl_trans *trans,
1706 unsigned long *flags)
1707 {
1708 int ret;
1709 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1710
1711 spin_lock_irqsave(&trans_pcie->reg_lock, *flags);
1712
1713 if (trans_pcie->cmd_hold_nic_awake)
1714 goto out;
1715
1716 /* this bit wakes up the NIC */
1717 __iwl_trans_pcie_set_bit(trans, CSR_GP_CNTRL,
1718 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
1719 if (trans->cfg->device_family == IWL_DEVICE_FAMILY_8000)
1720 udelay(2);
1721
1722 /*
1723 * These bits say the device is running, and should keep running for
1724 * at least a short while (at least as long as MAC_ACCESS_REQ stays 1),
1725 * but they do not indicate that embedded SRAM is restored yet;
1726 * 3945 and 4965 have volatile SRAM, and must save/restore contents
1727 * to/from host DRAM when sleeping/waking for power-saving.
1728 * Each direction takes approximately 1/4 millisecond; with this
1729 * overhead, it's a good idea to grab and hold MAC_ACCESS_REQUEST if a
1730 * series of register accesses are expected (e.g. reading Event Log),
1731 * to keep device from sleeping.
1732 *
1733 * CSR_UCODE_DRV_GP1 register bit MAC_SLEEP == 0 indicates that
1734 * SRAM is okay/restored. We don't check that here because this call
1735 * is just for hardware register access; but GP1 MAC_SLEEP check is a
1736 * good idea before accessing 3945/4965 SRAM (e.g. reading Event Log).
1737 *
1738 * 5000 series and later (including 1000 series) have non-volatile SRAM,
1739 * and do not save/restore SRAM when power cycling.
1740 */
1741 ret = iwl_poll_bit(trans, CSR_GP_CNTRL,
1742 CSR_GP_CNTRL_REG_VAL_MAC_ACCESS_EN,
1743 (CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY |
1744 CSR_GP_CNTRL_REG_FLAG_GOING_TO_SLEEP), 15000);
1745 if (unlikely(ret < 0)) {
1746 iwl_write32(trans, CSR_RESET, CSR_RESET_REG_FLAG_FORCE_NMI);
1747 WARN_ONCE(1,
1748 "Timeout waiting for hardware access (CSR_GP_CNTRL 0x%08x)\n",
1749 iwl_read32(trans, CSR_GP_CNTRL));
1750 spin_unlock_irqrestore(&trans_pcie->reg_lock, *flags);
1751 return false;
1752 }
1753
1754 out:
1755 /*
1756 * Fool sparse by faking we release the lock - sparse will
1757 * track nic_access anyway.
1758 */
1759 __release(&trans_pcie->reg_lock);
1760 return true;
1761 }
1762
1763 static void iwl_trans_pcie_release_nic_access(struct iwl_trans *trans,
1764 unsigned long *flags)
1765 {
1766 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1767
1768 lockdep_assert_held(&trans_pcie->reg_lock);
1769
1770 /*
1771 * Fool sparse by faking we acquiring the lock - sparse will
1772 * track nic_access anyway.
1773 */
1774 __acquire(&trans_pcie->reg_lock);
1775
1776 if (trans_pcie->cmd_hold_nic_awake)
1777 goto out;
1778
1779 __iwl_trans_pcie_clear_bit(trans, CSR_GP_CNTRL,
1780 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
1781 /*
1782 * Above we read the CSR_GP_CNTRL register, which will flush
1783 * any previous writes, but we need the write that clears the
1784 * MAC_ACCESS_REQ bit to be performed before any other writes
1785 * scheduled on different CPUs (after we drop reg_lock).
1786 */
1787 mmiowb();
1788 out:
1789 spin_unlock_irqrestore(&trans_pcie->reg_lock, *flags);
1790 }
1791
1792 static int iwl_trans_pcie_read_mem(struct iwl_trans *trans, u32 addr,
1793 void *buf, int dwords)
1794 {
1795 unsigned long flags;
1796 int offs, ret = 0;
1797 u32 *vals = buf;
1798
1799 if (iwl_trans_grab_nic_access(trans, &flags)) {
1800 iwl_write32(trans, HBUS_TARG_MEM_RADDR, addr);
1801 for (offs = 0; offs < dwords; offs++)
1802 vals[offs] = iwl_read32(trans, HBUS_TARG_MEM_RDAT);
1803 iwl_trans_release_nic_access(trans, &flags);
1804 } else {
1805 ret = -EBUSY;
1806 }
1807 return ret;
1808 }
1809
1810 static int iwl_trans_pcie_write_mem(struct iwl_trans *trans, u32 addr,
1811 const void *buf, int dwords)
1812 {
1813 unsigned long flags;
1814 int offs, ret = 0;
1815 const u32 *vals = buf;
1816
1817 if (iwl_trans_grab_nic_access(trans, &flags)) {
1818 iwl_write32(trans, HBUS_TARG_MEM_WADDR, addr);
1819 for (offs = 0; offs < dwords; offs++)
1820 iwl_write32(trans, HBUS_TARG_MEM_WDAT,
1821 vals ? vals[offs] : 0);
1822 iwl_trans_release_nic_access(trans, &flags);
1823 } else {
1824 ret = -EBUSY;
1825 }
1826 return ret;
1827 }
1828
1829 static void iwl_trans_pcie_freeze_txq_timer(struct iwl_trans *trans,
1830 unsigned long txqs,
1831 bool freeze)
1832 {
1833 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1834 int queue;
1835
1836 for_each_set_bit(queue, &txqs, BITS_PER_LONG) {
1837 struct iwl_txq *txq = &trans_pcie->txq[queue];
1838 unsigned long now;
1839
1840 spin_lock_bh(&txq->lock);
1841
1842 now = jiffies;
1843
1844 if (txq->frozen == freeze)
1845 goto next_queue;
1846
1847 IWL_DEBUG_TX_QUEUES(trans, "%s TXQ %d\n",
1848 freeze ? "Freezing" : "Waking", queue);
1849
1850 txq->frozen = freeze;
1851
1852 if (txq->q.read_ptr == txq->q.write_ptr)
1853 goto next_queue;
1854
1855 if (freeze) {
1856 if (unlikely(time_after(now,
1857 txq->stuck_timer.expires))) {
1858 /*
1859 * The timer should have fired, maybe it is
1860 * spinning right now on the lock.
1861 */
1862 goto next_queue;
1863 }
1864 /* remember how long until the timer fires */
1865 txq->frozen_expiry_remainder =
1866 txq->stuck_timer.expires - now;
1867 del_timer(&txq->stuck_timer);
1868 goto next_queue;
1869 }
1870
1871 /*
1872 * Wake a non-empty queue -> arm timer with the
1873 * remainder before it froze
1874 */
1875 mod_timer(&txq->stuck_timer,
1876 now + txq->frozen_expiry_remainder);
1877
1878 next_queue:
1879 spin_unlock_bh(&txq->lock);
1880 }
1881 }
1882
1883 static void iwl_trans_pcie_block_txq_ptrs(struct iwl_trans *trans, bool block)
1884 {
1885 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1886 int i;
1887
1888 for (i = 0; i < trans->cfg->base_params->num_of_queues; i++) {
1889 struct iwl_txq *txq = &trans_pcie->txq[i];
1890
1891 if (i == trans_pcie->cmd_queue)
1892 continue;
1893
1894 spin_lock_bh(&txq->lock);
1895
1896 if (!block && !(WARN_ON_ONCE(!txq->block))) {
1897 txq->block--;
1898 if (!txq->block) {
1899 iwl_write32(trans, HBUS_TARG_WRPTR,
1900 txq->q.write_ptr | (i << 8));
1901 }
1902 } else if (block) {
1903 txq->block++;
1904 }
1905
1906 spin_unlock_bh(&txq->lock);
1907 }
1908 }
1909
1910 #define IWL_FLUSH_WAIT_MS 2000
1911
1912 static int iwl_trans_pcie_wait_txq_empty(struct iwl_trans *trans, u32 txq_bm)
1913 {
1914 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1915 struct iwl_txq *txq;
1916 struct iwl_queue *q;
1917 int cnt;
1918 unsigned long now = jiffies;
1919 u32 scd_sram_addr;
1920 u8 buf[16];
1921 int ret = 0;
1922
1923 /* waiting for all the tx frames complete might take a while */
1924 for (cnt = 0; cnt < trans->cfg->base_params->num_of_queues; cnt++) {
1925 u8 wr_ptr;
1926
1927 if (cnt == trans_pcie->cmd_queue)
1928 continue;
1929 if (!test_bit(cnt, trans_pcie->queue_used))
1930 continue;
1931 if (!(BIT(cnt) & txq_bm))
1932 continue;
1933
1934 IWL_DEBUG_TX_QUEUES(trans, "Emptying queue %d...\n", cnt);
1935 txq = &trans_pcie->txq[cnt];
1936 q = &txq->q;
1937 wr_ptr = ACCESS_ONCE(q->write_ptr);
1938
1939 while (q->read_ptr != ACCESS_ONCE(q->write_ptr) &&
1940 !time_after(jiffies,
1941 now + msecs_to_jiffies(IWL_FLUSH_WAIT_MS))) {
1942 u8 write_ptr = ACCESS_ONCE(q->write_ptr);
1943
1944 if (WARN_ONCE(wr_ptr != write_ptr,
1945 "WR pointer moved while flushing %d -> %d\n",
1946 wr_ptr, write_ptr))
1947 return -ETIMEDOUT;
1948 usleep_range(1000, 2000);
1949 }
1950
1951 if (q->read_ptr != q->write_ptr) {
1952 IWL_ERR(trans,
1953 "fail to flush all tx fifo queues Q %d\n", cnt);
1954 ret = -ETIMEDOUT;
1955 break;
1956 }
1957 IWL_DEBUG_TX_QUEUES(trans, "Queue %d is now empty.\n", cnt);
1958 }
1959
1960 if (!ret)
1961 return 0;
1962
1963 IWL_ERR(trans, "Current SW read_ptr %d write_ptr %d\n",
1964 txq->q.read_ptr, txq->q.write_ptr);
1965
1966 scd_sram_addr = trans_pcie->scd_base_addr +
1967 SCD_TX_STTS_QUEUE_OFFSET(txq->q.id);
1968 iwl_trans_read_mem_bytes(trans, scd_sram_addr, buf, sizeof(buf));
1969
1970 iwl_print_hex_error(trans, buf, sizeof(buf));
1971
1972 for (cnt = 0; cnt < FH_TCSR_CHNL_NUM; cnt++)
1973 IWL_ERR(trans, "FH TRBs(%d) = 0x%08x\n", cnt,
1974 iwl_read_direct32(trans, FH_TX_TRB_REG(cnt)));
1975
1976 for (cnt = 0; cnt < trans->cfg->base_params->num_of_queues; cnt++) {
1977 u32 status = iwl_read_prph(trans, SCD_QUEUE_STATUS_BITS(cnt));
1978 u8 fifo = (status >> SCD_QUEUE_STTS_REG_POS_TXF) & 0x7;
1979 bool active = !!(status & BIT(SCD_QUEUE_STTS_REG_POS_ACTIVE));
1980 u32 tbl_dw =
1981 iwl_trans_read_mem32(trans, trans_pcie->scd_base_addr +
1982 SCD_TRANS_TBL_OFFSET_QUEUE(cnt));
1983
1984 if (cnt & 0x1)
1985 tbl_dw = (tbl_dw & 0xFFFF0000) >> 16;
1986 else
1987 tbl_dw = tbl_dw & 0x0000FFFF;
1988
1989 IWL_ERR(trans,
1990 "Q %d is %sactive and mapped to fifo %d ra_tid 0x%04x [%d,%d]\n",
1991 cnt, active ? "" : "in", fifo, tbl_dw,
1992 iwl_read_prph(trans, SCD_QUEUE_RDPTR(cnt)) &
1993 (TFD_QUEUE_SIZE_MAX - 1),
1994 iwl_read_prph(trans, SCD_QUEUE_WRPTR(cnt)));
1995 }
1996
1997 return ret;
1998 }
1999
2000 static void iwl_trans_pcie_set_bits_mask(struct iwl_trans *trans, u32 reg,
2001 u32 mask, u32 value)
2002 {
2003 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2004 unsigned long flags;
2005
2006 spin_lock_irqsave(&trans_pcie->reg_lock, flags);
2007 __iwl_trans_pcie_set_bits_mask(trans, reg, mask, value);
2008 spin_unlock_irqrestore(&trans_pcie->reg_lock, flags);
2009 }
2010
2011 static void iwl_trans_pcie_ref(struct iwl_trans *trans)
2012 {
2013 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2014
2015 if (iwlwifi_mod_params.d0i3_disable)
2016 return;
2017
2018 pm_runtime_get(&trans_pcie->pci_dev->dev);
2019
2020 #ifdef CONFIG_PM
2021 IWL_DEBUG_RPM(trans, "runtime usage count: %d\n",
2022 atomic_read(&trans_pcie->pci_dev->dev.power.usage_count));
2023 #endif /* CONFIG_PM */
2024 }
2025
2026 static void iwl_trans_pcie_unref(struct iwl_trans *trans)
2027 {
2028 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2029
2030 if (iwlwifi_mod_params.d0i3_disable)
2031 return;
2032
2033 pm_runtime_mark_last_busy(&trans_pcie->pci_dev->dev);
2034 pm_runtime_put_autosuspend(&trans_pcie->pci_dev->dev);
2035
2036 #ifdef CONFIG_PM
2037 IWL_DEBUG_RPM(trans, "runtime usage count: %d\n",
2038 atomic_read(&trans_pcie->pci_dev->dev.power.usage_count));
2039 #endif /* CONFIG_PM */
2040 }
2041
2042 static const char *get_csr_string(int cmd)
2043 {
2044 #define IWL_CMD(x) case x: return #x
2045 switch (cmd) {
2046 IWL_CMD(CSR_HW_IF_CONFIG_REG);
2047 IWL_CMD(CSR_INT_COALESCING);
2048 IWL_CMD(CSR_INT);
2049 IWL_CMD(CSR_INT_MASK);
2050 IWL_CMD(CSR_FH_INT_STATUS);
2051 IWL_CMD(CSR_GPIO_IN);
2052 IWL_CMD(CSR_RESET);
2053 IWL_CMD(CSR_GP_CNTRL);
2054 IWL_CMD(CSR_HW_REV);
2055 IWL_CMD(CSR_EEPROM_REG);
2056 IWL_CMD(CSR_EEPROM_GP);
2057 IWL_CMD(CSR_OTP_GP_REG);
2058 IWL_CMD(CSR_GIO_REG);
2059 IWL_CMD(CSR_GP_UCODE_REG);
2060 IWL_CMD(CSR_GP_DRIVER_REG);
2061 IWL_CMD(CSR_UCODE_DRV_GP1);
2062 IWL_CMD(CSR_UCODE_DRV_GP2);
2063 IWL_CMD(CSR_LED_REG);
2064 IWL_CMD(CSR_DRAM_INT_TBL_REG);
2065 IWL_CMD(CSR_GIO_CHICKEN_BITS);
2066 IWL_CMD(CSR_ANA_PLL_CFG);
2067 IWL_CMD(CSR_HW_REV_WA_REG);
2068 IWL_CMD(CSR_MONITOR_STATUS_REG);
2069 IWL_CMD(CSR_DBG_HPET_MEM_REG);
2070 default:
2071 return "UNKNOWN";
2072 }
2073 #undef IWL_CMD
2074 }
2075
2076 void iwl_pcie_dump_csr(struct iwl_trans *trans)
2077 {
2078 int i;
2079 static const u32 csr_tbl[] = {
2080 CSR_HW_IF_CONFIG_REG,
2081 CSR_INT_COALESCING,
2082 CSR_INT,
2083 CSR_INT_MASK,
2084 CSR_FH_INT_STATUS,
2085 CSR_GPIO_IN,
2086 CSR_RESET,
2087 CSR_GP_CNTRL,
2088 CSR_HW_REV,
2089 CSR_EEPROM_REG,
2090 CSR_EEPROM_GP,
2091 CSR_OTP_GP_REG,
2092 CSR_GIO_REG,
2093 CSR_GP_UCODE_REG,
2094 CSR_GP_DRIVER_REG,
2095 CSR_UCODE_DRV_GP1,
2096 CSR_UCODE_DRV_GP2,
2097 CSR_LED_REG,
2098 CSR_DRAM_INT_TBL_REG,
2099 CSR_GIO_CHICKEN_BITS,
2100 CSR_ANA_PLL_CFG,
2101 CSR_MONITOR_STATUS_REG,
2102 CSR_HW_REV_WA_REG,
2103 CSR_DBG_HPET_MEM_REG
2104 };
2105 IWL_ERR(trans, "CSR values:\n");
2106 IWL_ERR(trans, "(2nd byte of CSR_INT_COALESCING is "
2107 "CSR_INT_PERIODIC_REG)\n");
2108 for (i = 0; i < ARRAY_SIZE(csr_tbl); i++) {
2109 IWL_ERR(trans, " %25s: 0X%08x\n",
2110 get_csr_string(csr_tbl[i]),
2111 iwl_read32(trans, csr_tbl[i]));
2112 }
2113 }
2114
2115 #ifdef CONFIG_IWLWIFI_DEBUGFS
2116 /* create and remove of files */
2117 #define DEBUGFS_ADD_FILE(name, parent, mode) do { \
2118 if (!debugfs_create_file(#name, mode, parent, trans, \
2119 &iwl_dbgfs_##name##_ops)) \
2120 goto err; \
2121 } while (0)
2122
2123 /* file operation */
2124 #define DEBUGFS_READ_FILE_OPS(name) \
2125 static const struct file_operations iwl_dbgfs_##name##_ops = { \
2126 .read = iwl_dbgfs_##name##_read, \
2127 .open = simple_open, \
2128 .llseek = generic_file_llseek, \
2129 };
2130
2131 #define DEBUGFS_WRITE_FILE_OPS(name) \
2132 static const struct file_operations iwl_dbgfs_##name##_ops = { \
2133 .write = iwl_dbgfs_##name##_write, \
2134 .open = simple_open, \
2135 .llseek = generic_file_llseek, \
2136 };
2137
2138 #define DEBUGFS_READ_WRITE_FILE_OPS(name) \
2139 static const struct file_operations iwl_dbgfs_##name##_ops = { \
2140 .write = iwl_dbgfs_##name##_write, \
2141 .read = iwl_dbgfs_##name##_read, \
2142 .open = simple_open, \
2143 .llseek = generic_file_llseek, \
2144 };
2145
2146 static ssize_t iwl_dbgfs_tx_queue_read(struct file *file,
2147 char __user *user_buf,
2148 size_t count, loff_t *ppos)
2149 {
2150 struct iwl_trans *trans = file->private_data;
2151 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2152 struct iwl_txq *txq;
2153 struct iwl_queue *q;
2154 char *buf;
2155 int pos = 0;
2156 int cnt;
2157 int ret;
2158 size_t bufsz;
2159
2160 bufsz = sizeof(char) * 75 * trans->cfg->base_params->num_of_queues;
2161
2162 if (!trans_pcie->txq)
2163 return -EAGAIN;
2164
2165 buf = kzalloc(bufsz, GFP_KERNEL);
2166 if (!buf)
2167 return -ENOMEM;
2168
2169 for (cnt = 0; cnt < trans->cfg->base_params->num_of_queues; cnt++) {
2170 txq = &trans_pcie->txq[cnt];
2171 q = &txq->q;
2172 pos += scnprintf(buf + pos, bufsz - pos,
2173 "hwq %.2d: read=%u write=%u use=%d stop=%d need_update=%d frozen=%d%s\n",
2174 cnt, q->read_ptr, q->write_ptr,
2175 !!test_bit(cnt, trans_pcie->queue_used),
2176 !!test_bit(cnt, trans_pcie->queue_stopped),
2177 txq->need_update, txq->frozen,
2178 (cnt == trans_pcie->cmd_queue ? " HCMD" : ""));
2179 }
2180 ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
2181 kfree(buf);
2182 return ret;
2183 }
2184
2185 static ssize_t iwl_dbgfs_rx_queue_read(struct file *file,
2186 char __user *user_buf,
2187 size_t count, loff_t *ppos)
2188 {
2189 struct iwl_trans *trans = file->private_data;
2190 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2191 char *buf;
2192 int pos = 0, i, ret;
2193 size_t bufsz = sizeof(buf);
2194
2195 bufsz = sizeof(char) * 121 * trans->num_rx_queues;
2196
2197 if (!trans_pcie->rxq)
2198 return -EAGAIN;
2199
2200 buf = kzalloc(bufsz, GFP_KERNEL);
2201 if (!buf)
2202 return -ENOMEM;
2203
2204 for (i = 0; i < trans->num_rx_queues && pos < bufsz; i++) {
2205 struct iwl_rxq *rxq = &trans_pcie->rxq[i];
2206
2207 pos += scnprintf(buf + pos, bufsz - pos, "queue#: %2d\n",
2208 i);
2209 pos += scnprintf(buf + pos, bufsz - pos, "\tread: %u\n",
2210 rxq->read);
2211 pos += scnprintf(buf + pos, bufsz - pos, "\twrite: %u\n",
2212 rxq->write);
2213 pos += scnprintf(buf + pos, bufsz - pos, "\twrite_actual: %u\n",
2214 rxq->write_actual);
2215 pos += scnprintf(buf + pos, bufsz - pos, "\tneed_update: %2d\n",
2216 rxq->need_update);
2217 pos += scnprintf(buf + pos, bufsz - pos, "\tfree_count: %u\n",
2218 rxq->free_count);
2219 if (rxq->rb_stts) {
2220 pos += scnprintf(buf + pos, bufsz - pos,
2221 "\tclosed_rb_num: %u\n",
2222 le16_to_cpu(rxq->rb_stts->closed_rb_num) &
2223 0x0FFF);
2224 } else {
2225 pos += scnprintf(buf + pos, bufsz - pos,
2226 "\tclosed_rb_num: Not Allocated\n");
2227 }
2228 }
2229 ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
2230 kfree(buf);
2231
2232 return ret;
2233 }
2234
2235 static ssize_t iwl_dbgfs_interrupt_read(struct file *file,
2236 char __user *user_buf,
2237 size_t count, loff_t *ppos)
2238 {
2239 struct iwl_trans *trans = file->private_data;
2240 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2241 struct isr_statistics *isr_stats = &trans_pcie->isr_stats;
2242
2243 int pos = 0;
2244 char *buf;
2245 int bufsz = 24 * 64; /* 24 items * 64 char per item */
2246 ssize_t ret;
2247
2248 buf = kzalloc(bufsz, GFP_KERNEL);
2249 if (!buf)
2250 return -ENOMEM;
2251
2252 pos += scnprintf(buf + pos, bufsz - pos,
2253 "Interrupt Statistics Report:\n");
2254
2255 pos += scnprintf(buf + pos, bufsz - pos, "HW Error:\t\t\t %u\n",
2256 isr_stats->hw);
2257 pos += scnprintf(buf + pos, bufsz - pos, "SW Error:\t\t\t %u\n",
2258 isr_stats->sw);
2259 if (isr_stats->sw || isr_stats->hw) {
2260 pos += scnprintf(buf + pos, bufsz - pos,
2261 "\tLast Restarting Code: 0x%X\n",
2262 isr_stats->err_code);
2263 }
2264 #ifdef CONFIG_IWLWIFI_DEBUG
2265 pos += scnprintf(buf + pos, bufsz - pos, "Frame transmitted:\t\t %u\n",
2266 isr_stats->sch);
2267 pos += scnprintf(buf + pos, bufsz - pos, "Alive interrupt:\t\t %u\n",
2268 isr_stats->alive);
2269 #endif
2270 pos += scnprintf(buf + pos, bufsz - pos,
2271 "HW RF KILL switch toggled:\t %u\n", isr_stats->rfkill);
2272
2273 pos += scnprintf(buf + pos, bufsz - pos, "CT KILL:\t\t\t %u\n",
2274 isr_stats->ctkill);
2275
2276 pos += scnprintf(buf + pos, bufsz - pos, "Wakeup Interrupt:\t\t %u\n",
2277 isr_stats->wakeup);
2278
2279 pos += scnprintf(buf + pos, bufsz - pos,
2280 "Rx command responses:\t\t %u\n", isr_stats->rx);
2281
2282 pos += scnprintf(buf + pos, bufsz - pos, "Tx/FH interrupt:\t\t %u\n",
2283 isr_stats->tx);
2284
2285 pos += scnprintf(buf + pos, bufsz - pos, "Unexpected INTA:\t\t %u\n",
2286 isr_stats->unhandled);
2287
2288 ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
2289 kfree(buf);
2290 return ret;
2291 }
2292
2293 static ssize_t iwl_dbgfs_interrupt_write(struct file *file,
2294 const char __user *user_buf,
2295 size_t count, loff_t *ppos)
2296 {
2297 struct iwl_trans *trans = file->private_data;
2298 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2299 struct isr_statistics *isr_stats = &trans_pcie->isr_stats;
2300
2301 char buf[8];
2302 int buf_size;
2303 u32 reset_flag;
2304
2305 memset(buf, 0, sizeof(buf));
2306 buf_size = min(count, sizeof(buf) - 1);
2307 if (copy_from_user(buf, user_buf, buf_size))
2308 return -EFAULT;
2309 if (sscanf(buf, "%x", &reset_flag) != 1)
2310 return -EFAULT;
2311 if (reset_flag == 0)
2312 memset(isr_stats, 0, sizeof(*isr_stats));
2313
2314 return count;
2315 }
2316
2317 static ssize_t iwl_dbgfs_csr_write(struct file *file,
2318 const char __user *user_buf,
2319 size_t count, loff_t *ppos)
2320 {
2321 struct iwl_trans *trans = file->private_data;
2322 char buf[8];
2323 int buf_size;
2324 int csr;
2325
2326 memset(buf, 0, sizeof(buf));
2327 buf_size = min(count, sizeof(buf) - 1);
2328 if (copy_from_user(buf, user_buf, buf_size))
2329 return -EFAULT;
2330 if (sscanf(buf, "%d", &csr) != 1)
2331 return -EFAULT;
2332
2333 iwl_pcie_dump_csr(trans);
2334
2335 return count;
2336 }
2337
2338 static ssize_t iwl_dbgfs_fh_reg_read(struct file *file,
2339 char __user *user_buf,
2340 size_t count, loff_t *ppos)
2341 {
2342 struct iwl_trans *trans = file->private_data;
2343 char *buf = NULL;
2344 ssize_t ret;
2345
2346 ret = iwl_dump_fh(trans, &buf);
2347 if (ret < 0)
2348 return ret;
2349 if (!buf)
2350 return -EINVAL;
2351 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
2352 kfree(buf);
2353 return ret;
2354 }
2355
2356 DEBUGFS_READ_WRITE_FILE_OPS(interrupt);
2357 DEBUGFS_READ_FILE_OPS(fh_reg);
2358 DEBUGFS_READ_FILE_OPS(rx_queue);
2359 DEBUGFS_READ_FILE_OPS(tx_queue);
2360 DEBUGFS_WRITE_FILE_OPS(csr);
2361
2362 /* Create the debugfs files and directories */
2363 int iwl_trans_pcie_dbgfs_register(struct iwl_trans *trans)
2364 {
2365 struct dentry *dir = trans->dbgfs_dir;
2366
2367 DEBUGFS_ADD_FILE(rx_queue, dir, S_IRUSR);
2368 DEBUGFS_ADD_FILE(tx_queue, dir, S_IRUSR);
2369 DEBUGFS_ADD_FILE(interrupt, dir, S_IWUSR | S_IRUSR);
2370 DEBUGFS_ADD_FILE(csr, dir, S_IWUSR);
2371 DEBUGFS_ADD_FILE(fh_reg, dir, S_IRUSR);
2372 return 0;
2373
2374 err:
2375 IWL_ERR(trans, "failed to create the trans debugfs entry\n");
2376 return -ENOMEM;
2377 }
2378 #endif /*CONFIG_IWLWIFI_DEBUGFS */
2379
2380 static u32 iwl_trans_pcie_get_cmdlen(struct iwl_tfd *tfd)
2381 {
2382 u32 cmdlen = 0;
2383 int i;
2384
2385 for (i = 0; i < IWL_NUM_OF_TBS; i++)
2386 cmdlen += iwl_pcie_tfd_tb_get_len(tfd, i);
2387
2388 return cmdlen;
2389 }
2390
2391 static u32 iwl_trans_pcie_dump_rbs(struct iwl_trans *trans,
2392 struct iwl_fw_error_dump_data **data,
2393 int allocated_rb_nums)
2394 {
2395 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2396 int max_len = PAGE_SIZE << trans_pcie->rx_page_order;
2397 /* Dump RBs is supported only for pre-9000 devices (1 queue) */
2398 struct iwl_rxq *rxq = &trans_pcie->rxq[0];
2399 u32 i, r, j, rb_len = 0;
2400
2401 spin_lock(&rxq->lock);
2402
2403 r = le16_to_cpu(ACCESS_ONCE(rxq->rb_stts->closed_rb_num)) & 0x0FFF;
2404
2405 for (i = rxq->read, j = 0;
2406 i != r && j < allocated_rb_nums;
2407 i = (i + 1) & RX_QUEUE_MASK, j++) {
2408 struct iwl_rx_mem_buffer *rxb = rxq->queue[i];
2409 struct iwl_fw_error_dump_rb *rb;
2410
2411 dma_unmap_page(trans->dev, rxb->page_dma, max_len,
2412 DMA_FROM_DEVICE);
2413
2414 rb_len += sizeof(**data) + sizeof(*rb) + max_len;
2415
2416 (*data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_RB);
2417 (*data)->len = cpu_to_le32(sizeof(*rb) + max_len);
2418 rb = (void *)(*data)->data;
2419 rb->index = cpu_to_le32(i);
2420 memcpy(rb->data, page_address(rxb->page), max_len);
2421 /* remap the page for the free benefit */
2422 rxb->page_dma = dma_map_page(trans->dev, rxb->page, 0,
2423 max_len,
2424 DMA_FROM_DEVICE);
2425
2426 *data = iwl_fw_error_next_data(*data);
2427 }
2428
2429 spin_unlock(&rxq->lock);
2430
2431 return rb_len;
2432 }
2433 #define IWL_CSR_TO_DUMP (0x250)
2434
2435 static u32 iwl_trans_pcie_dump_csr(struct iwl_trans *trans,
2436 struct iwl_fw_error_dump_data **data)
2437 {
2438 u32 csr_len = sizeof(**data) + IWL_CSR_TO_DUMP;
2439 __le32 *val;
2440 int i;
2441
2442 (*data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_CSR);
2443 (*data)->len = cpu_to_le32(IWL_CSR_TO_DUMP);
2444 val = (void *)(*data)->data;
2445
2446 for (i = 0; i < IWL_CSR_TO_DUMP; i += 4)
2447 *val++ = cpu_to_le32(iwl_trans_pcie_read32(trans, i));
2448
2449 *data = iwl_fw_error_next_data(*data);
2450
2451 return csr_len;
2452 }
2453
2454 static u32 iwl_trans_pcie_fh_regs_dump(struct iwl_trans *trans,
2455 struct iwl_fw_error_dump_data **data)
2456 {
2457 u32 fh_regs_len = FH_MEM_UPPER_BOUND - FH_MEM_LOWER_BOUND;
2458 unsigned long flags;
2459 __le32 *val;
2460 int i;
2461
2462 if (!iwl_trans_grab_nic_access(trans, &flags))
2463 return 0;
2464
2465 (*data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_FH_REGS);
2466 (*data)->len = cpu_to_le32(fh_regs_len);
2467 val = (void *)(*data)->data;
2468
2469 for (i = FH_MEM_LOWER_BOUND; i < FH_MEM_UPPER_BOUND; i += sizeof(u32))
2470 *val++ = cpu_to_le32(iwl_trans_pcie_read32(trans, i));
2471
2472 iwl_trans_release_nic_access(trans, &flags);
2473
2474 *data = iwl_fw_error_next_data(*data);
2475
2476 return sizeof(**data) + fh_regs_len;
2477 }
2478
2479 static u32
2480 iwl_trans_pci_dump_marbh_monitor(struct iwl_trans *trans,
2481 struct iwl_fw_error_dump_fw_mon *fw_mon_data,
2482 u32 monitor_len)
2483 {
2484 u32 buf_size_in_dwords = (monitor_len >> 2);
2485 u32 *buffer = (u32 *)fw_mon_data->data;
2486 unsigned long flags;
2487 u32 i;
2488
2489 if (!iwl_trans_grab_nic_access(trans, &flags))
2490 return 0;
2491
2492 iwl_write_prph_no_grab(trans, MON_DMARB_RD_CTL_ADDR, 0x1);
2493 for (i = 0; i < buf_size_in_dwords; i++)
2494 buffer[i] = iwl_read_prph_no_grab(trans,
2495 MON_DMARB_RD_DATA_ADDR);
2496 iwl_write_prph_no_grab(trans, MON_DMARB_RD_CTL_ADDR, 0x0);
2497
2498 iwl_trans_release_nic_access(trans, &flags);
2499
2500 return monitor_len;
2501 }
2502
2503 static u32
2504 iwl_trans_pcie_dump_monitor(struct iwl_trans *trans,
2505 struct iwl_fw_error_dump_data **data,
2506 u32 monitor_len)
2507 {
2508 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2509 u32 len = 0;
2510
2511 if ((trans_pcie->fw_mon_page &&
2512 trans->cfg->device_family == IWL_DEVICE_FAMILY_7000) ||
2513 trans->dbg_dest_tlv) {
2514 struct iwl_fw_error_dump_fw_mon *fw_mon_data;
2515 u32 base, write_ptr, wrap_cnt;
2516
2517 /* If there was a dest TLV - use the values from there */
2518 if (trans->dbg_dest_tlv) {
2519 write_ptr =
2520 le32_to_cpu(trans->dbg_dest_tlv->write_ptr_reg);
2521 wrap_cnt = le32_to_cpu(trans->dbg_dest_tlv->wrap_count);
2522 base = le32_to_cpu(trans->dbg_dest_tlv->base_reg);
2523 } else {
2524 base = MON_BUFF_BASE_ADDR;
2525 write_ptr = MON_BUFF_WRPTR;
2526 wrap_cnt = MON_BUFF_CYCLE_CNT;
2527 }
2528
2529 (*data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_FW_MONITOR);
2530 fw_mon_data = (void *)(*data)->data;
2531 fw_mon_data->fw_mon_wr_ptr =
2532 cpu_to_le32(iwl_read_prph(trans, write_ptr));
2533 fw_mon_data->fw_mon_cycle_cnt =
2534 cpu_to_le32(iwl_read_prph(trans, wrap_cnt));
2535 fw_mon_data->fw_mon_base_ptr =
2536 cpu_to_le32(iwl_read_prph(trans, base));
2537
2538 len += sizeof(**data) + sizeof(*fw_mon_data);
2539 if (trans_pcie->fw_mon_page) {
2540 /*
2541 * The firmware is now asserted, it won't write anything
2542 * to the buffer. CPU can take ownership to fetch the
2543 * data. The buffer will be handed back to the device
2544 * before the firmware will be restarted.
2545 */
2546 dma_sync_single_for_cpu(trans->dev,
2547 trans_pcie->fw_mon_phys,
2548 trans_pcie->fw_mon_size,
2549 DMA_FROM_DEVICE);
2550 memcpy(fw_mon_data->data,
2551 page_address(trans_pcie->fw_mon_page),
2552 trans_pcie->fw_mon_size);
2553
2554 monitor_len = trans_pcie->fw_mon_size;
2555 } else if (trans->dbg_dest_tlv->monitor_mode == SMEM_MODE) {
2556 /*
2557 * Update pointers to reflect actual values after
2558 * shifting
2559 */
2560 base = iwl_read_prph(trans, base) <<
2561 trans->dbg_dest_tlv->base_shift;
2562 iwl_trans_read_mem(trans, base, fw_mon_data->data,
2563 monitor_len / sizeof(u32));
2564 } else if (trans->dbg_dest_tlv->monitor_mode == MARBH_MODE) {
2565 monitor_len =
2566 iwl_trans_pci_dump_marbh_monitor(trans,
2567 fw_mon_data,
2568 monitor_len);
2569 } else {
2570 /* Didn't match anything - output no monitor data */
2571 monitor_len = 0;
2572 }
2573
2574 len += monitor_len;
2575 (*data)->len = cpu_to_le32(monitor_len + sizeof(*fw_mon_data));
2576 }
2577
2578 return len;
2579 }
2580
2581 static struct iwl_trans_dump_data
2582 *iwl_trans_pcie_dump_data(struct iwl_trans *trans,
2583 const struct iwl_fw_dbg_trigger_tlv *trigger)
2584 {
2585 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2586 struct iwl_fw_error_dump_data *data;
2587 struct iwl_txq *cmdq = &trans_pcie->txq[trans_pcie->cmd_queue];
2588 struct iwl_fw_error_dump_txcmd *txcmd;
2589 struct iwl_trans_dump_data *dump_data;
2590 u32 len, num_rbs;
2591 u32 monitor_len;
2592 int i, ptr;
2593 bool dump_rbs = test_bit(STATUS_FW_ERROR, &trans->status) &&
2594 !trans->cfg->mq_rx_supported;
2595
2596 /* transport dump header */
2597 len = sizeof(*dump_data);
2598
2599 /* host commands */
2600 len += sizeof(*data) +
2601 cmdq->q.n_window * (sizeof(*txcmd) + TFD_MAX_PAYLOAD_SIZE);
2602
2603 /* FW monitor */
2604 if (trans_pcie->fw_mon_page) {
2605 len += sizeof(*data) + sizeof(struct iwl_fw_error_dump_fw_mon) +
2606 trans_pcie->fw_mon_size;
2607 monitor_len = trans_pcie->fw_mon_size;
2608 } else if (trans->dbg_dest_tlv) {
2609 u32 base, end;
2610
2611 base = le32_to_cpu(trans->dbg_dest_tlv->base_reg);
2612 end = le32_to_cpu(trans->dbg_dest_tlv->end_reg);
2613
2614 base = iwl_read_prph(trans, base) <<
2615 trans->dbg_dest_tlv->base_shift;
2616 end = iwl_read_prph(trans, end) <<
2617 trans->dbg_dest_tlv->end_shift;
2618
2619 /* Make "end" point to the actual end */
2620 if (trans->cfg->device_family == IWL_DEVICE_FAMILY_8000 ||
2621 trans->dbg_dest_tlv->monitor_mode == MARBH_MODE)
2622 end += (1 << trans->dbg_dest_tlv->end_shift);
2623 monitor_len = end - base;
2624 len += sizeof(*data) + sizeof(struct iwl_fw_error_dump_fw_mon) +
2625 monitor_len;
2626 } else {
2627 monitor_len = 0;
2628 }
2629
2630 if (trigger && (trigger->mode & IWL_FW_DBG_TRIGGER_MONITOR_ONLY)) {
2631 dump_data = vzalloc(len);
2632 if (!dump_data)
2633 return NULL;
2634
2635 data = (void *)dump_data->data;
2636 len = iwl_trans_pcie_dump_monitor(trans, &data, monitor_len);
2637 dump_data->len = len;
2638
2639 return dump_data;
2640 }
2641
2642 /* CSR registers */
2643 len += sizeof(*data) + IWL_CSR_TO_DUMP;
2644
2645 /* FH registers */
2646 len += sizeof(*data) + (FH_MEM_UPPER_BOUND - FH_MEM_LOWER_BOUND);
2647
2648 if (dump_rbs) {
2649 /* Dump RBs is supported only for pre-9000 devices (1 queue) */
2650 struct iwl_rxq *rxq = &trans_pcie->rxq[0];
2651 /* RBs */
2652 num_rbs = le16_to_cpu(ACCESS_ONCE(rxq->rb_stts->closed_rb_num))
2653 & 0x0FFF;
2654 num_rbs = (num_rbs - rxq->read) & RX_QUEUE_MASK;
2655 len += num_rbs * (sizeof(*data) +
2656 sizeof(struct iwl_fw_error_dump_rb) +
2657 (PAGE_SIZE << trans_pcie->rx_page_order));
2658 }
2659
2660 dump_data = vzalloc(len);
2661 if (!dump_data)
2662 return NULL;
2663
2664 len = 0;
2665 data = (void *)dump_data->data;
2666 data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_TXCMD);
2667 txcmd = (void *)data->data;
2668 spin_lock_bh(&cmdq->lock);
2669 ptr = cmdq->q.write_ptr;
2670 for (i = 0; i < cmdq->q.n_window; i++) {
2671 u8 idx = get_cmd_index(&cmdq->q, ptr);
2672 u32 caplen, cmdlen;
2673
2674 cmdlen = iwl_trans_pcie_get_cmdlen(&cmdq->tfds[ptr]);
2675 caplen = min_t(u32, TFD_MAX_PAYLOAD_SIZE, cmdlen);
2676
2677 if (cmdlen) {
2678 len += sizeof(*txcmd) + caplen;
2679 txcmd->cmdlen = cpu_to_le32(cmdlen);
2680 txcmd->caplen = cpu_to_le32(caplen);
2681 memcpy(txcmd->data, cmdq->entries[idx].cmd, caplen);
2682 txcmd = (void *)((u8 *)txcmd->data + caplen);
2683 }
2684
2685 ptr = iwl_queue_dec_wrap(ptr);
2686 }
2687 spin_unlock_bh(&cmdq->lock);
2688
2689 data->len = cpu_to_le32(len);
2690 len += sizeof(*data);
2691 data = iwl_fw_error_next_data(data);
2692
2693 len += iwl_trans_pcie_dump_csr(trans, &data);
2694 len += iwl_trans_pcie_fh_regs_dump(trans, &data);
2695 if (dump_rbs)
2696 len += iwl_trans_pcie_dump_rbs(trans, &data, num_rbs);
2697
2698 len += iwl_trans_pcie_dump_monitor(trans, &data, monitor_len);
2699
2700 dump_data->len = len;
2701
2702 return dump_data;
2703 }
2704
2705 #ifdef CONFIG_PM_SLEEP
2706 static int iwl_trans_pcie_suspend(struct iwl_trans *trans)
2707 {
2708 if (trans->runtime_pm_mode == IWL_PLAT_PM_MODE_D0I3)
2709 return iwl_pci_fw_enter_d0i3(trans);
2710
2711 return 0;
2712 }
2713
2714 static void iwl_trans_pcie_resume(struct iwl_trans *trans)
2715 {
2716 if (trans->runtime_pm_mode == IWL_PLAT_PM_MODE_D0I3)
2717 iwl_pci_fw_exit_d0i3(trans);
2718 }
2719 #endif /* CONFIG_PM_SLEEP */
2720
2721 static const struct iwl_trans_ops trans_ops_pcie = {
2722 .start_hw = iwl_trans_pcie_start_hw,
2723 .op_mode_leave = iwl_trans_pcie_op_mode_leave,
2724 .fw_alive = iwl_trans_pcie_fw_alive,
2725 .start_fw = iwl_trans_pcie_start_fw,
2726 .stop_device = iwl_trans_pcie_stop_device,
2727
2728 .d3_suspend = iwl_trans_pcie_d3_suspend,
2729 .d3_resume = iwl_trans_pcie_d3_resume,
2730
2731 #ifdef CONFIG_PM_SLEEP
2732 .suspend = iwl_trans_pcie_suspend,
2733 .resume = iwl_trans_pcie_resume,
2734 #endif /* CONFIG_PM_SLEEP */
2735
2736 .send_cmd = iwl_trans_pcie_send_hcmd,
2737
2738 .tx = iwl_trans_pcie_tx,
2739 .reclaim = iwl_trans_pcie_reclaim,
2740
2741 .txq_disable = iwl_trans_pcie_txq_disable,
2742 .txq_enable = iwl_trans_pcie_txq_enable,
2743
2744 .wait_tx_queue_empty = iwl_trans_pcie_wait_txq_empty,
2745 .freeze_txq_timer = iwl_trans_pcie_freeze_txq_timer,
2746 .block_txq_ptrs = iwl_trans_pcie_block_txq_ptrs,
2747
2748 .write8 = iwl_trans_pcie_write8,
2749 .write32 = iwl_trans_pcie_write32,
2750 .read32 = iwl_trans_pcie_read32,
2751 .read_prph = iwl_trans_pcie_read_prph,
2752 .write_prph = iwl_trans_pcie_write_prph,
2753 .read_mem = iwl_trans_pcie_read_mem,
2754 .write_mem = iwl_trans_pcie_write_mem,
2755 .configure = iwl_trans_pcie_configure,
2756 .set_pmi = iwl_trans_pcie_set_pmi,
2757 .grab_nic_access = iwl_trans_pcie_grab_nic_access,
2758 .release_nic_access = iwl_trans_pcie_release_nic_access,
2759 .set_bits_mask = iwl_trans_pcie_set_bits_mask,
2760
2761 .ref = iwl_trans_pcie_ref,
2762 .unref = iwl_trans_pcie_unref,
2763
2764 .dump_data = iwl_trans_pcie_dump_data,
2765 };
2766
2767 struct iwl_trans *iwl_trans_pcie_alloc(struct pci_dev *pdev,
2768 const struct pci_device_id *ent,
2769 const struct iwl_cfg *cfg)
2770 {
2771 struct iwl_trans_pcie *trans_pcie;
2772 struct iwl_trans *trans;
2773 int ret, addr_size;
2774
2775 trans = iwl_trans_alloc(sizeof(struct iwl_trans_pcie),
2776 &pdev->dev, cfg, &trans_ops_pcie, 0);
2777 if (!trans)
2778 return ERR_PTR(-ENOMEM);
2779
2780 trans->max_skb_frags = IWL_PCIE_MAX_FRAGS;
2781
2782 trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2783
2784 trans_pcie->trans = trans;
2785 spin_lock_init(&trans_pcie->irq_lock);
2786 spin_lock_init(&trans_pcie->reg_lock);
2787 mutex_init(&trans_pcie->mutex);
2788 init_waitqueue_head(&trans_pcie->ucode_write_waitq);
2789 trans_pcie->tso_hdr_page = alloc_percpu(struct iwl_tso_hdr_page);
2790 if (!trans_pcie->tso_hdr_page) {
2791 ret = -ENOMEM;
2792 goto out_no_pci;
2793 }
2794
2795 ret = pci_enable_device(pdev);
2796 if (ret)
2797 goto out_no_pci;
2798
2799 if (!cfg->base_params->pcie_l1_allowed) {
2800 /*
2801 * W/A - seems to solve weird behavior. We need to remove this
2802 * if we don't want to stay in L1 all the time. This wastes a
2803 * lot of power.
2804 */
2805 pci_disable_link_state(pdev, PCIE_LINK_STATE_L0S |
2806 PCIE_LINK_STATE_L1 |
2807 PCIE_LINK_STATE_CLKPM);
2808 }
2809
2810 if (cfg->mq_rx_supported)
2811 addr_size = 64;
2812 else
2813 addr_size = 36;
2814
2815 pci_set_master(pdev);
2816
2817 ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(addr_size));
2818 if (!ret)
2819 ret = pci_set_consistent_dma_mask(pdev,
2820 DMA_BIT_MASK(addr_size));
2821 if (ret) {
2822 ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
2823 if (!ret)
2824 ret = pci_set_consistent_dma_mask(pdev,
2825 DMA_BIT_MASK(32));
2826 /* both attempts failed: */
2827 if (ret) {
2828 dev_err(&pdev->dev, "No suitable DMA available\n");
2829 goto out_pci_disable_device;
2830 }
2831 }
2832
2833 ret = pci_request_regions(pdev, DRV_NAME);
2834 if (ret) {
2835 dev_err(&pdev->dev, "pci_request_regions failed\n");
2836 goto out_pci_disable_device;
2837 }
2838
2839 trans_pcie->hw_base = pci_ioremap_bar(pdev, 0);
2840 if (!trans_pcie->hw_base) {
2841 dev_err(&pdev->dev, "pci_ioremap_bar failed\n");
2842 ret = -ENODEV;
2843 goto out_pci_release_regions;
2844 }
2845
2846 /* We disable the RETRY_TIMEOUT register (0x41) to keep
2847 * PCI Tx retries from interfering with C3 CPU state */
2848 pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
2849
2850 trans->dev = &pdev->dev;
2851 trans_pcie->pci_dev = pdev;
2852 iwl_disable_interrupts(trans);
2853
2854 trans->hw_rev = iwl_read32(trans, CSR_HW_REV);
2855 /*
2856 * In the 8000 HW family the format of the 4 bytes of CSR_HW_REV have
2857 * changed, and now the revision step also includes bit 0-1 (no more
2858 * "dash" value). To keep hw_rev backwards compatible - we'll store it
2859 * in the old format.
2860 */
2861 if (trans->cfg->device_family == IWL_DEVICE_FAMILY_8000) {
2862 unsigned long flags;
2863
2864 trans->hw_rev = (trans->hw_rev & 0xfff0) |
2865 (CSR_HW_REV_STEP(trans->hw_rev << 2) << 2);
2866
2867 ret = iwl_pcie_prepare_card_hw(trans);
2868 if (ret) {
2869 IWL_WARN(trans, "Exit HW not ready\n");
2870 goto out_pci_disable_msi;
2871 }
2872
2873 /*
2874 * in-order to recognize C step driver should read chip version
2875 * id located at the AUX bus MISC address space.
2876 */
2877 iwl_set_bit(trans, CSR_GP_CNTRL,
2878 CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
2879 udelay(2);
2880
2881 ret = iwl_poll_bit(trans, CSR_GP_CNTRL,
2882 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
2883 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
2884 25000);
2885 if (ret < 0) {
2886 IWL_DEBUG_INFO(trans, "Failed to wake up the nic\n");
2887 goto out_pci_disable_msi;
2888 }
2889
2890 if (iwl_trans_grab_nic_access(trans, &flags)) {
2891 u32 hw_step;
2892
2893 hw_step = iwl_read_prph_no_grab(trans, WFPM_CTRL_REG);
2894 hw_step |= ENABLE_WFPM;
2895 iwl_write_prph_no_grab(trans, WFPM_CTRL_REG, hw_step);
2896 hw_step = iwl_read_prph_no_grab(trans, AUX_MISC_REG);
2897 hw_step = (hw_step >> HW_STEP_LOCATION_BITS) & 0xF;
2898 if (hw_step == 0x3)
2899 trans->hw_rev = (trans->hw_rev & 0xFFFFFFF3) |
2900 (SILICON_C_STEP << 2);
2901 iwl_trans_release_nic_access(trans, &flags);
2902 }
2903 }
2904
2905 trans->hw_rf_id = iwl_read32(trans, CSR_HW_RF_ID);
2906
2907 iwl_pcie_set_interrupt_capa(pdev, trans);
2908 trans->hw_id = (pdev->device << 16) + pdev->subsystem_device;
2909 snprintf(trans->hw_id_str, sizeof(trans->hw_id_str),
2910 "PCI ID: 0x%04X:0x%04X", pdev->device, pdev->subsystem_device);
2911
2912 /* Initialize the wait queue for commands */
2913 init_waitqueue_head(&trans_pcie->wait_command_queue);
2914
2915 init_waitqueue_head(&trans_pcie->d0i3_waitq);
2916
2917 if (trans_pcie->msix_enabled) {
2918 if (iwl_pcie_init_msix_handler(pdev, trans_pcie))
2919 goto out_pci_release_regions;
2920 } else {
2921 ret = iwl_pcie_alloc_ict(trans);
2922 if (ret)
2923 goto out_pci_disable_msi;
2924
2925 ret = request_threaded_irq(pdev->irq, iwl_pcie_isr,
2926 iwl_pcie_irq_handler,
2927 IRQF_SHARED, DRV_NAME, trans);
2928 if (ret) {
2929 IWL_ERR(trans, "Error allocating IRQ %d\n", pdev->irq);
2930 goto out_free_ict;
2931 }
2932 trans_pcie->inta_mask = CSR_INI_SET_MASK;
2933 }
2934
2935 #ifdef CONFIG_IWLWIFI_PCIE_RTPM
2936 trans->runtime_pm_mode = IWL_PLAT_PM_MODE_D0I3;
2937 #else
2938 trans->runtime_pm_mode = IWL_PLAT_PM_MODE_DISABLED;
2939 #endif /* CONFIG_IWLWIFI_PCIE_RTPM */
2940
2941 return trans;
2942
2943 out_free_ict:
2944 iwl_pcie_free_ict(trans);
2945 out_pci_disable_msi:
2946 pci_disable_msi(pdev);
2947 out_pci_release_regions:
2948 pci_release_regions(pdev);
2949 out_pci_disable_device:
2950 pci_disable_device(pdev);
2951 out_no_pci:
2952 free_percpu(trans_pcie->tso_hdr_page);
2953 iwl_trans_free(trans);
2954 return ERR_PTR(ret);
2955 }
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