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Merge tag 'for-linus-20170825' of git://git.infradead.org/linux-mtd
[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 - 2017 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 - 2017 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 "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 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 IWL_DEBUG_POWER(trans, "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;
240
241 IWL_DEBUG_INFO(trans, "Init card's basic functions\n");
242
243 /*
244 * Use "set_bit" below rather than "write", to preserve any hardware
245 * bits already set by default after reset.
246 */
247
248 /* Disable L0S exit timer (platform NMI Work/Around) */
249 if (trans->cfg->device_family < IWL_DEVICE_FAMILY_8000)
250 iwl_set_bit(trans, CSR_GIO_CHICKEN_BITS,
251 CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
252
253 /*
254 * Disable L0s without affecting L1;
255 * don't wait for ICH L0s (ICH bug W/A)
256 */
257 iwl_set_bit(trans, CSR_GIO_CHICKEN_BITS,
258 CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
259
260 /* Set FH wait threshold to maximum (HW error during stress W/A) */
261 iwl_set_bit(trans, CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL);
262
263 /*
264 * Enable HAP INTA (interrupt from management bus) to
265 * wake device's PCI Express link L1a -> L0s
266 */
267 iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG,
268 CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
269
270 iwl_pcie_apm_config(trans);
271
272 /* Configure analog phase-lock-loop before activating to D0A */
273 if (trans->cfg->base_params->pll_cfg)
274 iwl_set_bit(trans, CSR_ANA_PLL_CFG, CSR50_ANA_PLL_CFG_VAL);
275
276 /*
277 * Set "initialization complete" bit to move adapter from
278 * D0U* --> D0A* (powered-up active) state.
279 */
280 iwl_set_bit(trans, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
281
282 /*
283 * Wait for clock stabilization; once stabilized, access to
284 * device-internal resources is supported, e.g. iwl_write_prph()
285 * and accesses to uCode SRAM.
286 */
287 ret = iwl_poll_bit(trans, CSR_GP_CNTRL,
288 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
289 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
290 if (ret < 0) {
291 IWL_ERR(trans, "Failed to init the card\n");
292 return ret;
293 }
294
295 if (trans->cfg->host_interrupt_operation_mode) {
296 /*
297 * This is a bit of an abuse - This is needed for 7260 / 3160
298 * only check host_interrupt_operation_mode even if this is
299 * not related to host_interrupt_operation_mode.
300 *
301 * Enable the oscillator to count wake up time for L1 exit. This
302 * consumes slightly more power (100uA) - but allows to be sure
303 * that we wake up from L1 on time.
304 *
305 * This looks weird: read twice the same register, discard the
306 * value, set a bit, and yet again, read that same register
307 * just to discard the value. But that's the way the hardware
308 * seems to like it.
309 */
310 iwl_read_prph(trans, OSC_CLK);
311 iwl_read_prph(trans, OSC_CLK);
312 iwl_set_bits_prph(trans, OSC_CLK, OSC_CLK_FORCE_CONTROL);
313 iwl_read_prph(trans, OSC_CLK);
314 iwl_read_prph(trans, OSC_CLK);
315 }
316
317 /*
318 * Enable DMA clock and wait for it to stabilize.
319 *
320 * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0"
321 * bits do not disable clocks. This preserves any hardware
322 * bits already set by default in "CLK_CTRL_REG" after reset.
323 */
324 if (!trans->cfg->apmg_not_supported) {
325 iwl_write_prph(trans, APMG_CLK_EN_REG,
326 APMG_CLK_VAL_DMA_CLK_RQT);
327 udelay(20);
328
329 /* Disable L1-Active */
330 iwl_set_bits_prph(trans, APMG_PCIDEV_STT_REG,
331 APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
332
333 /* Clear the interrupt in APMG if the NIC is in RFKILL */
334 iwl_write_prph(trans, APMG_RTC_INT_STT_REG,
335 APMG_RTC_INT_STT_RFKILL);
336 }
337
338 set_bit(STATUS_DEVICE_ENABLED, &trans->status);
339
340 return 0;
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 iwl_pcie_sw_reset(trans);
362
363 /*
364 * Set "initialization complete" bit to move adapter from
365 * D0U* --> D0A* (powered-up active) state.
366 */
367 iwl_set_bit(trans, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
368
369 /*
370 * Wait for clock stabilization; once stabilized, access to
371 * device-internal resources is possible.
372 */
373 ret = iwl_poll_bit(trans, CSR_GP_CNTRL,
374 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
375 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
376 25000);
377 if (WARN_ON(ret < 0)) {
378 IWL_ERR(trans, "Access time out - failed to enable LP XTAL\n");
379 /* Release XTAL ON request */
380 __iwl_trans_pcie_clear_bit(trans, CSR_GP_CNTRL,
381 CSR_GP_CNTRL_REG_FLAG_XTAL_ON);
382 return;
383 }
384
385 /*
386 * Clear "disable persistence" to avoid LP XTAL resetting when
387 * SHRD_HW_RST is applied in S3.
388 */
389 iwl_clear_bits_prph(trans, APMG_PCIDEV_STT_REG,
390 APMG_PCIDEV_STT_VAL_PERSIST_DIS);
391
392 /*
393 * Force APMG XTAL to be active to prevent its disabling by HW
394 * caused by APMG idle state.
395 */
396 apmg_xtal_cfg_reg = iwl_trans_pcie_read_shr(trans,
397 SHR_APMG_XTAL_CFG_REG);
398 iwl_trans_pcie_write_shr(trans, SHR_APMG_XTAL_CFG_REG,
399 apmg_xtal_cfg_reg |
400 SHR_APMG_XTAL_CFG_XTAL_ON_REQ);
401
402 iwl_pcie_sw_reset(trans);
403
404 /* Enable LP XTAL by indirect access through CSR */
405 apmg_gp1_reg = iwl_trans_pcie_read_shr(trans, SHR_APMG_GP1_REG);
406 iwl_trans_pcie_write_shr(trans, SHR_APMG_GP1_REG, apmg_gp1_reg |
407 SHR_APMG_GP1_WF_XTAL_LP_EN |
408 SHR_APMG_GP1_CHICKEN_BIT_SELECT);
409
410 /* Clear delay line clock power up */
411 dl_cfg_reg = iwl_trans_pcie_read_shr(trans, SHR_APMG_DL_CFG_REG);
412 iwl_trans_pcie_write_shr(trans, SHR_APMG_DL_CFG_REG, dl_cfg_reg &
413 ~SHR_APMG_DL_CFG_DL_CLOCK_POWER_UP);
414
415 /*
416 * Enable persistence mode to avoid LP XTAL resetting when
417 * SHRD_HW_RST is applied in S3.
418 */
419 iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG,
420 CSR_HW_IF_CONFIG_REG_PERSIST_MODE);
421
422 /*
423 * Clear "initialization complete" bit to move adapter from
424 * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
425 */
426 iwl_clear_bit(trans, CSR_GP_CNTRL,
427 CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
428
429 /* Activates XTAL resources monitor */
430 __iwl_trans_pcie_set_bit(trans, CSR_MONITOR_CFG_REG,
431 CSR_MONITOR_XTAL_RESOURCES);
432
433 /* Release XTAL ON request */
434 __iwl_trans_pcie_clear_bit(trans, CSR_GP_CNTRL,
435 CSR_GP_CNTRL_REG_FLAG_XTAL_ON);
436 udelay(10);
437
438 /* Release APMG XTAL */
439 iwl_trans_pcie_write_shr(trans, SHR_APMG_XTAL_CFG_REG,
440 apmg_xtal_cfg_reg &
441 ~SHR_APMG_XTAL_CFG_XTAL_ON_REQ);
442 }
443
444 void iwl_pcie_apm_stop_master(struct iwl_trans *trans)
445 {
446 int ret;
447
448 /* stop device's busmaster DMA activity */
449 iwl_set_bit(trans, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
450
451 ret = iwl_poll_bit(trans, CSR_RESET,
452 CSR_RESET_REG_FLAG_MASTER_DISABLED,
453 CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
454 if (ret < 0)
455 IWL_WARN(trans, "Master Disable Timed Out, 100 usec\n");
456
457 IWL_DEBUG_INFO(trans, "stop master\n");
458 }
459
460 static void iwl_pcie_apm_stop(struct iwl_trans *trans, bool op_mode_leave)
461 {
462 IWL_DEBUG_INFO(trans, "Stop card, put in low power state\n");
463
464 if (op_mode_leave) {
465 if (!test_bit(STATUS_DEVICE_ENABLED, &trans->status))
466 iwl_pcie_apm_init(trans);
467
468 /* inform ME that we are leaving */
469 if (trans->cfg->device_family == IWL_DEVICE_FAMILY_7000)
470 iwl_set_bits_prph(trans, APMG_PCIDEV_STT_REG,
471 APMG_PCIDEV_STT_VAL_WAKE_ME);
472 else if (trans->cfg->device_family >= IWL_DEVICE_FAMILY_8000) {
473 iwl_set_bit(trans, CSR_DBG_LINK_PWR_MGMT_REG,
474 CSR_RESET_LINK_PWR_MGMT_DISABLED);
475 iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG,
476 CSR_HW_IF_CONFIG_REG_PREPARE |
477 CSR_HW_IF_CONFIG_REG_ENABLE_PME);
478 mdelay(1);
479 iwl_clear_bit(trans, CSR_DBG_LINK_PWR_MGMT_REG,
480 CSR_RESET_LINK_PWR_MGMT_DISABLED);
481 }
482 mdelay(5);
483 }
484
485 clear_bit(STATUS_DEVICE_ENABLED, &trans->status);
486
487 /* Stop device's DMA activity */
488 iwl_pcie_apm_stop_master(trans);
489
490 if (trans->cfg->lp_xtal_workaround) {
491 iwl_pcie_apm_lp_xtal_enable(trans);
492 return;
493 }
494
495 iwl_pcie_sw_reset(trans);
496
497 /*
498 * Clear "initialization complete" bit to move adapter from
499 * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
500 */
501 iwl_clear_bit(trans, CSR_GP_CNTRL,
502 CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
503 }
504
505 static int iwl_pcie_nic_init(struct iwl_trans *trans)
506 {
507 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
508 int ret;
509
510 /* nic_init */
511 spin_lock(&trans_pcie->irq_lock);
512 ret = iwl_pcie_apm_init(trans);
513 spin_unlock(&trans_pcie->irq_lock);
514
515 if (ret)
516 return ret;
517
518 iwl_pcie_set_pwr(trans, false);
519
520 iwl_op_mode_nic_config(trans->op_mode);
521
522 /* Allocate the RX queue, or reset if it is already allocated */
523 iwl_pcie_rx_init(trans);
524
525 /* Allocate or reset and init all Tx and Command queues */
526 if (iwl_pcie_tx_init(trans))
527 return -ENOMEM;
528
529 if (trans->cfg->base_params->shadow_reg_enable) {
530 /* enable shadow regs in HW */
531 iwl_set_bit(trans, CSR_MAC_SHADOW_REG_CTRL, 0x800FFFFF);
532 IWL_DEBUG_INFO(trans, "Enabling shadow registers in device\n");
533 }
534
535 return 0;
536 }
537
538 #define HW_READY_TIMEOUT (50)
539
540 /* Note: returns poll_bit return value, which is >= 0 if success */
541 static int iwl_pcie_set_hw_ready(struct iwl_trans *trans)
542 {
543 int ret;
544
545 iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG,
546 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY);
547
548 /* See if we got it */
549 ret = iwl_poll_bit(trans, CSR_HW_IF_CONFIG_REG,
550 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
551 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
552 HW_READY_TIMEOUT);
553
554 if (ret >= 0)
555 iwl_set_bit(trans, CSR_MBOX_SET_REG, CSR_MBOX_SET_REG_OS_ALIVE);
556
557 IWL_DEBUG_INFO(trans, "hardware%s ready\n", ret < 0 ? " not" : "");
558 return ret;
559 }
560
561 /* Note: returns standard 0/-ERROR code */
562 int iwl_pcie_prepare_card_hw(struct iwl_trans *trans)
563 {
564 int ret;
565 int t = 0;
566 int iter;
567
568 IWL_DEBUG_INFO(trans, "iwl_trans_prepare_card_hw enter\n");
569
570 ret = iwl_pcie_set_hw_ready(trans);
571 /* If the card is ready, exit 0 */
572 if (ret >= 0)
573 return 0;
574
575 iwl_set_bit(trans, CSR_DBG_LINK_PWR_MGMT_REG,
576 CSR_RESET_LINK_PWR_MGMT_DISABLED);
577 usleep_range(1000, 2000);
578
579 for (iter = 0; iter < 10; iter++) {
580 /* If HW is not ready, prepare the conditions to check again */
581 iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG,
582 CSR_HW_IF_CONFIG_REG_PREPARE);
583
584 do {
585 ret = iwl_pcie_set_hw_ready(trans);
586 if (ret >= 0)
587 return 0;
588
589 usleep_range(200, 1000);
590 t += 200;
591 } while (t < 150000);
592 msleep(25);
593 }
594
595 IWL_ERR(trans, "Couldn't prepare the card\n");
596
597 return ret;
598 }
599
600 /*
601 * ucode
602 */
603 static void iwl_pcie_load_firmware_chunk_fh(struct iwl_trans *trans,
604 u32 dst_addr, dma_addr_t phy_addr,
605 u32 byte_cnt)
606 {
607 iwl_write32(trans, FH_TCSR_CHNL_TX_CONFIG_REG(FH_SRVC_CHNL),
608 FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_PAUSE);
609
610 iwl_write32(trans, FH_SRVC_CHNL_SRAM_ADDR_REG(FH_SRVC_CHNL),
611 dst_addr);
612
613 iwl_write32(trans, FH_TFDIB_CTRL0_REG(FH_SRVC_CHNL),
614 phy_addr & FH_MEM_TFDIB_DRAM_ADDR_LSB_MSK);
615
616 iwl_write32(trans, FH_TFDIB_CTRL1_REG(FH_SRVC_CHNL),
617 (iwl_get_dma_hi_addr(phy_addr)
618 << FH_MEM_TFDIB_REG1_ADDR_BITSHIFT) | byte_cnt);
619
620 iwl_write32(trans, FH_TCSR_CHNL_TX_BUF_STS_REG(FH_SRVC_CHNL),
621 BIT(FH_TCSR_CHNL_TX_BUF_STS_REG_POS_TB_NUM) |
622 BIT(FH_TCSR_CHNL_TX_BUF_STS_REG_POS_TB_IDX) |
623 FH_TCSR_CHNL_TX_BUF_STS_REG_VAL_TFDB_VALID);
624
625 iwl_write32(trans, FH_TCSR_CHNL_TX_CONFIG_REG(FH_SRVC_CHNL),
626 FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE |
627 FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_DISABLE |
628 FH_TCSR_TX_CONFIG_REG_VAL_CIRQ_HOST_ENDTFD);
629 }
630
631 static int iwl_pcie_load_firmware_chunk(struct iwl_trans *trans,
632 u32 dst_addr, dma_addr_t phy_addr,
633 u32 byte_cnt)
634 {
635 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
636 unsigned long flags;
637 int ret;
638
639 trans_pcie->ucode_write_complete = false;
640
641 if (!iwl_trans_grab_nic_access(trans, &flags))
642 return -EIO;
643
644 iwl_pcie_load_firmware_chunk_fh(trans, dst_addr, phy_addr,
645 byte_cnt);
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 static int iwl_pcie_load_cpu_sections_8000(struct iwl_trans *trans,
716 const struct fw_img *image,
717 int cpu,
718 int *first_ucode_section)
719 {
720 int shift_param;
721 int i, ret = 0, sec_num = 0x1;
722 u32 val, last_read_idx = 0;
723
724 if (cpu == 1) {
725 shift_param = 0;
726 *first_ucode_section = 0;
727 } else {
728 shift_param = 16;
729 (*first_ucode_section)++;
730 }
731
732 for (i = *first_ucode_section; i < image->num_sec; i++) {
733 last_read_idx = i;
734
735 /*
736 * CPU1_CPU2_SEPARATOR_SECTION delimiter - separate between
737 * CPU1 to CPU2.
738 * PAGING_SEPARATOR_SECTION delimiter - separate between
739 * CPU2 non paged to CPU2 paging sec.
740 */
741 if (!image->sec[i].data ||
742 image->sec[i].offset == CPU1_CPU2_SEPARATOR_SECTION ||
743 image->sec[i].offset == PAGING_SEPARATOR_SECTION) {
744 IWL_DEBUG_FW(trans,
745 "Break since Data not valid or Empty section, sec = %d\n",
746 i);
747 break;
748 }
749
750 ret = iwl_pcie_load_section(trans, i, &image->sec[i]);
751 if (ret)
752 return ret;
753
754 /* Notify ucode of loaded section number and status */
755 val = iwl_read_direct32(trans, FH_UCODE_LOAD_STATUS);
756 val = val | (sec_num << shift_param);
757 iwl_write_direct32(trans, FH_UCODE_LOAD_STATUS, val);
758
759 sec_num = (sec_num << 1) | 0x1;
760 }
761
762 *first_ucode_section = last_read_idx;
763
764 iwl_enable_interrupts(trans);
765
766 if (trans->cfg->use_tfh) {
767 if (cpu == 1)
768 iwl_write_prph(trans, UREG_UCODE_LOAD_STATUS,
769 0xFFFF);
770 else
771 iwl_write_prph(trans, UREG_UCODE_LOAD_STATUS,
772 0xFFFFFFFF);
773 } else {
774 if (cpu == 1)
775 iwl_write_direct32(trans, FH_UCODE_LOAD_STATUS,
776 0xFFFF);
777 else
778 iwl_write_direct32(trans, FH_UCODE_LOAD_STATUS,
779 0xFFFFFFFF);
780 }
781
782 return 0;
783 }
784
785 static int iwl_pcie_load_cpu_sections(struct iwl_trans *trans,
786 const struct fw_img *image,
787 int cpu,
788 int *first_ucode_section)
789 {
790 int i, ret = 0;
791 u32 last_read_idx = 0;
792
793 if (cpu == 1)
794 *first_ucode_section = 0;
795 else
796 (*first_ucode_section)++;
797
798 for (i = *first_ucode_section; i < image->num_sec; i++) {
799 last_read_idx = i;
800
801 /*
802 * CPU1_CPU2_SEPARATOR_SECTION delimiter - separate between
803 * CPU1 to CPU2.
804 * PAGING_SEPARATOR_SECTION delimiter - separate between
805 * CPU2 non paged to CPU2 paging sec.
806 */
807 if (!image->sec[i].data ||
808 image->sec[i].offset == CPU1_CPU2_SEPARATOR_SECTION ||
809 image->sec[i].offset == PAGING_SEPARATOR_SECTION) {
810 IWL_DEBUG_FW(trans,
811 "Break since Data not valid or Empty section, sec = %d\n",
812 i);
813 break;
814 }
815
816 ret = iwl_pcie_load_section(trans, i, &image->sec[i]);
817 if (ret)
818 return ret;
819 }
820
821 *first_ucode_section = last_read_idx;
822
823 return 0;
824 }
825
826 void iwl_pcie_apply_destination(struct iwl_trans *trans)
827 {
828 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
829 const struct iwl_fw_dbg_dest_tlv *dest = trans->dbg_dest_tlv;
830 int i;
831
832 if (dest->version)
833 IWL_ERR(trans,
834 "DBG DEST version is %d - expect issues\n",
835 dest->version);
836
837 IWL_INFO(trans, "Applying debug destination %s\n",
838 get_fw_dbg_mode_string(dest->monitor_mode));
839
840 if (dest->monitor_mode == EXTERNAL_MODE)
841 iwl_pcie_alloc_fw_monitor(trans, dest->size_power);
842 else
843 IWL_WARN(trans, "PCI should have external buffer debug\n");
844
845 for (i = 0; i < trans->dbg_dest_reg_num; i++) {
846 u32 addr = le32_to_cpu(dest->reg_ops[i].addr);
847 u32 val = le32_to_cpu(dest->reg_ops[i].val);
848
849 switch (dest->reg_ops[i].op) {
850 case CSR_ASSIGN:
851 iwl_write32(trans, addr, val);
852 break;
853 case CSR_SETBIT:
854 iwl_set_bit(trans, addr, BIT(val));
855 break;
856 case CSR_CLEARBIT:
857 iwl_clear_bit(trans, addr, BIT(val));
858 break;
859 case PRPH_ASSIGN:
860 iwl_write_prph(trans, addr, val);
861 break;
862 case PRPH_SETBIT:
863 iwl_set_bits_prph(trans, addr, BIT(val));
864 break;
865 case PRPH_CLEARBIT:
866 iwl_clear_bits_prph(trans, addr, BIT(val));
867 break;
868 case PRPH_BLOCKBIT:
869 if (iwl_read_prph(trans, addr) & BIT(val)) {
870 IWL_ERR(trans,
871 "BIT(%u) in address 0x%x is 1, stopping FW configuration\n",
872 val, addr);
873 goto monitor;
874 }
875 break;
876 default:
877 IWL_ERR(trans, "FW debug - unknown OP %d\n",
878 dest->reg_ops[i].op);
879 break;
880 }
881 }
882
883 monitor:
884 if (dest->monitor_mode == EXTERNAL_MODE && trans_pcie->fw_mon_size) {
885 iwl_write_prph(trans, le32_to_cpu(dest->base_reg),
886 trans_pcie->fw_mon_phys >> dest->base_shift);
887 if (trans->cfg->device_family >= IWL_DEVICE_FAMILY_8000)
888 iwl_write_prph(trans, le32_to_cpu(dest->end_reg),
889 (trans_pcie->fw_mon_phys +
890 trans_pcie->fw_mon_size - 256) >>
891 dest->end_shift);
892 else
893 iwl_write_prph(trans, le32_to_cpu(dest->end_reg),
894 (trans_pcie->fw_mon_phys +
895 trans_pcie->fw_mon_size) >>
896 dest->end_shift);
897 }
898 }
899
900 static int iwl_pcie_load_given_ucode(struct iwl_trans *trans,
901 const struct fw_img *image)
902 {
903 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
904 int ret = 0;
905 int first_ucode_section;
906
907 IWL_DEBUG_FW(trans, "working with %s CPU\n",
908 image->is_dual_cpus ? "Dual" : "Single");
909
910 /* load to FW the binary non secured sections of CPU1 */
911 ret = iwl_pcie_load_cpu_sections(trans, image, 1, &first_ucode_section);
912 if (ret)
913 return ret;
914
915 if (image->is_dual_cpus) {
916 /* set CPU2 header address */
917 iwl_write_prph(trans,
918 LMPM_SECURE_UCODE_LOAD_CPU2_HDR_ADDR,
919 LMPM_SECURE_CPU2_HDR_MEM_SPACE);
920
921 /* load to FW the binary sections of CPU2 */
922 ret = iwl_pcie_load_cpu_sections(trans, image, 2,
923 &first_ucode_section);
924 if (ret)
925 return ret;
926 }
927
928 /* supported for 7000 only for the moment */
929 if (iwlwifi_mod_params.fw_monitor &&
930 trans->cfg->device_family == IWL_DEVICE_FAMILY_7000) {
931 iwl_pcie_alloc_fw_monitor(trans, 0);
932
933 if (trans_pcie->fw_mon_size) {
934 iwl_write_prph(trans, MON_BUFF_BASE_ADDR,
935 trans_pcie->fw_mon_phys >> 4);
936 iwl_write_prph(trans, MON_BUFF_END_ADDR,
937 (trans_pcie->fw_mon_phys +
938 trans_pcie->fw_mon_size) >> 4);
939 }
940 } else if (trans->dbg_dest_tlv) {
941 iwl_pcie_apply_destination(trans);
942 }
943
944 iwl_enable_interrupts(trans);
945
946 /* release CPU reset */
947 iwl_write32(trans, CSR_RESET, 0);
948
949 return 0;
950 }
951
952 static int iwl_pcie_load_given_ucode_8000(struct iwl_trans *trans,
953 const struct fw_img *image)
954 {
955 int ret = 0;
956 int first_ucode_section;
957
958 IWL_DEBUG_FW(trans, "working with %s CPU\n",
959 image->is_dual_cpus ? "Dual" : "Single");
960
961 if (trans->dbg_dest_tlv)
962 iwl_pcie_apply_destination(trans);
963
964 IWL_DEBUG_POWER(trans, "Original WFPM value = 0x%08X\n",
965 iwl_read_prph(trans, WFPM_GP2));
966
967 /*
968 * Set default value. On resume reading the values that were
969 * zeored can provide debug data on the resume flow.
970 * This is for debugging only and has no functional impact.
971 */
972 iwl_write_prph(trans, WFPM_GP2, 0x01010101);
973
974 /* configure the ucode to be ready to get the secured image */
975 /* release CPU reset */
976 iwl_write_prph(trans, RELEASE_CPU_RESET, RELEASE_CPU_RESET_BIT);
977
978 /* load to FW the binary Secured sections of CPU1 */
979 ret = iwl_pcie_load_cpu_sections_8000(trans, image, 1,
980 &first_ucode_section);
981 if (ret)
982 return ret;
983
984 /* load to FW the binary sections of CPU2 */
985 return iwl_pcie_load_cpu_sections_8000(trans, image, 2,
986 &first_ucode_section);
987 }
988
989 bool iwl_trans_check_hw_rf_kill(struct iwl_trans *trans)
990 {
991 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
992 bool hw_rfkill = iwl_is_rfkill_set(trans);
993 bool prev = test_bit(STATUS_RFKILL_OPMODE, &trans->status);
994 bool report;
995
996 if (hw_rfkill) {
997 set_bit(STATUS_RFKILL_HW, &trans->status);
998 set_bit(STATUS_RFKILL_OPMODE, &trans->status);
999 } else {
1000 clear_bit(STATUS_RFKILL_HW, &trans->status);
1001 if (trans_pcie->opmode_down)
1002 clear_bit(STATUS_RFKILL_OPMODE, &trans->status);
1003 }
1004
1005 report = test_bit(STATUS_RFKILL_OPMODE, &trans->status);
1006
1007 if (prev != report)
1008 iwl_trans_pcie_rf_kill(trans, report);
1009
1010 return hw_rfkill;
1011 }
1012
1013 struct iwl_causes_list {
1014 u32 cause_num;
1015 u32 mask_reg;
1016 u8 addr;
1017 };
1018
1019 static struct iwl_causes_list causes_list[] = {
1020 {MSIX_FH_INT_CAUSES_D2S_CH0_NUM, CSR_MSIX_FH_INT_MASK_AD, 0},
1021 {MSIX_FH_INT_CAUSES_D2S_CH1_NUM, CSR_MSIX_FH_INT_MASK_AD, 0x1},
1022 {MSIX_FH_INT_CAUSES_S2D, CSR_MSIX_FH_INT_MASK_AD, 0x3},
1023 {MSIX_FH_INT_CAUSES_FH_ERR, CSR_MSIX_FH_INT_MASK_AD, 0x5},
1024 {MSIX_HW_INT_CAUSES_REG_ALIVE, CSR_MSIX_HW_INT_MASK_AD, 0x10},
1025 {MSIX_HW_INT_CAUSES_REG_WAKEUP, CSR_MSIX_HW_INT_MASK_AD, 0x11},
1026 {MSIX_HW_INT_CAUSES_REG_CT_KILL, CSR_MSIX_HW_INT_MASK_AD, 0x16},
1027 {MSIX_HW_INT_CAUSES_REG_RF_KILL, CSR_MSIX_HW_INT_MASK_AD, 0x17},
1028 {MSIX_HW_INT_CAUSES_REG_PERIODIC, CSR_MSIX_HW_INT_MASK_AD, 0x18},
1029 {MSIX_HW_INT_CAUSES_REG_SW_ERR, CSR_MSIX_HW_INT_MASK_AD, 0x29},
1030 {MSIX_HW_INT_CAUSES_REG_SCD, CSR_MSIX_HW_INT_MASK_AD, 0x2A},
1031 {MSIX_HW_INT_CAUSES_REG_FH_TX, CSR_MSIX_HW_INT_MASK_AD, 0x2B},
1032 {MSIX_HW_INT_CAUSES_REG_HW_ERR, CSR_MSIX_HW_INT_MASK_AD, 0x2D},
1033 {MSIX_HW_INT_CAUSES_REG_HAP, CSR_MSIX_HW_INT_MASK_AD, 0x2E},
1034 };
1035
1036 static void iwl_pcie_map_non_rx_causes(struct iwl_trans *trans)
1037 {
1038 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1039 int val = trans_pcie->def_irq | MSIX_NON_AUTO_CLEAR_CAUSE;
1040 int i;
1041
1042 /*
1043 * Access all non RX causes and map them to the default irq.
1044 * In case we are missing at least one interrupt vector,
1045 * the first interrupt vector will serve non-RX and FBQ causes.
1046 */
1047 for (i = 0; i < ARRAY_SIZE(causes_list); i++) {
1048 iwl_write8(trans, CSR_MSIX_IVAR(causes_list[i].addr), val);
1049 iwl_clear_bit(trans, causes_list[i].mask_reg,
1050 causes_list[i].cause_num);
1051 }
1052 }
1053
1054 static void iwl_pcie_map_rx_causes(struct iwl_trans *trans)
1055 {
1056 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1057 u32 offset =
1058 trans_pcie->shared_vec_mask & IWL_SHARED_IRQ_FIRST_RSS ? 1 : 0;
1059 u32 val, idx;
1060
1061 /*
1062 * The first RX queue - fallback queue, which is designated for
1063 * management frame, command responses etc, is always mapped to the
1064 * first interrupt vector. The other RX queues are mapped to
1065 * the other (N - 2) interrupt vectors.
1066 */
1067 val = BIT(MSIX_FH_INT_CAUSES_Q(0));
1068 for (idx = 1; idx < trans->num_rx_queues; idx++) {
1069 iwl_write8(trans, CSR_MSIX_RX_IVAR(idx),
1070 MSIX_FH_INT_CAUSES_Q(idx - offset));
1071 val |= BIT(MSIX_FH_INT_CAUSES_Q(idx));
1072 }
1073 iwl_write32(trans, CSR_MSIX_FH_INT_MASK_AD, ~val);
1074
1075 val = MSIX_FH_INT_CAUSES_Q(0);
1076 if (trans_pcie->shared_vec_mask & IWL_SHARED_IRQ_NON_RX)
1077 val |= MSIX_NON_AUTO_CLEAR_CAUSE;
1078 iwl_write8(trans, CSR_MSIX_RX_IVAR(0), val);
1079
1080 if (trans_pcie->shared_vec_mask & IWL_SHARED_IRQ_FIRST_RSS)
1081 iwl_write8(trans, CSR_MSIX_RX_IVAR(1), val);
1082 }
1083
1084 void iwl_pcie_conf_msix_hw(struct iwl_trans_pcie *trans_pcie)
1085 {
1086 struct iwl_trans *trans = trans_pcie->trans;
1087
1088 if (!trans_pcie->msix_enabled) {
1089 if (trans->cfg->mq_rx_supported &&
1090 test_bit(STATUS_DEVICE_ENABLED, &trans->status))
1091 iwl_write_prph(trans, UREG_CHICK,
1092 UREG_CHICK_MSI_ENABLE);
1093 return;
1094 }
1095 /*
1096 * The IVAR table needs to be configured again after reset,
1097 * but if the device is disabled, we can't write to
1098 * prph.
1099 */
1100 if (test_bit(STATUS_DEVICE_ENABLED, &trans->status))
1101 iwl_write_prph(trans, UREG_CHICK, UREG_CHICK_MSIX_ENABLE);
1102
1103 /*
1104 * Each cause from the causes list above and the RX causes is
1105 * represented as a byte in the IVAR table. The first nibble
1106 * represents the bound interrupt vector of the cause, the second
1107 * represents no auto clear for this cause. This will be set if its
1108 * interrupt vector is bound to serve other causes.
1109 */
1110 iwl_pcie_map_rx_causes(trans);
1111
1112 iwl_pcie_map_non_rx_causes(trans);
1113 }
1114
1115 static void iwl_pcie_init_msix(struct iwl_trans_pcie *trans_pcie)
1116 {
1117 struct iwl_trans *trans = trans_pcie->trans;
1118
1119 iwl_pcie_conf_msix_hw(trans_pcie);
1120
1121 if (!trans_pcie->msix_enabled)
1122 return;
1123
1124 trans_pcie->fh_init_mask = ~iwl_read32(trans, CSR_MSIX_FH_INT_MASK_AD);
1125 trans_pcie->fh_mask = trans_pcie->fh_init_mask;
1126 trans_pcie->hw_init_mask = ~iwl_read32(trans, CSR_MSIX_HW_INT_MASK_AD);
1127 trans_pcie->hw_mask = trans_pcie->hw_init_mask;
1128 }
1129
1130 static void _iwl_trans_pcie_stop_device(struct iwl_trans *trans, bool low_power)
1131 {
1132 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1133
1134 lockdep_assert_held(&trans_pcie->mutex);
1135
1136 if (trans_pcie->is_down)
1137 return;
1138
1139 trans_pcie->is_down = true;
1140
1141 /* tell the device to stop sending interrupts */
1142 iwl_disable_interrupts(trans);
1143
1144 /* device going down, Stop using ICT table */
1145 iwl_pcie_disable_ict(trans);
1146
1147 /*
1148 * If a HW restart happens during firmware loading,
1149 * then the firmware loading might call this function
1150 * and later it might be called again due to the
1151 * restart. So don't process again if the device is
1152 * already dead.
1153 */
1154 if (test_and_clear_bit(STATUS_DEVICE_ENABLED, &trans->status)) {
1155 IWL_DEBUG_INFO(trans,
1156 "DEVICE_ENABLED bit was set and is now cleared\n");
1157 iwl_pcie_tx_stop(trans);
1158 iwl_pcie_rx_stop(trans);
1159
1160 /* Power-down device's busmaster DMA clocks */
1161 if (!trans->cfg->apmg_not_supported) {
1162 iwl_write_prph(trans, APMG_CLK_DIS_REG,
1163 APMG_CLK_VAL_DMA_CLK_RQT);
1164 udelay(5);
1165 }
1166 }
1167
1168 /* Make sure (redundant) we've released our request to stay awake */
1169 iwl_clear_bit(trans, CSR_GP_CNTRL,
1170 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
1171
1172 /* Stop the device, and put it in low power state */
1173 iwl_pcie_apm_stop(trans, false);
1174
1175 iwl_pcie_sw_reset(trans);
1176
1177 /*
1178 * Upon stop, the IVAR table gets erased, so msi-x won't
1179 * work. This causes a bug in RF-KILL flows, since the interrupt
1180 * that enables radio won't fire on the correct irq, and the
1181 * driver won't be able to handle the interrupt.
1182 * Configure the IVAR table again after reset.
1183 */
1184 iwl_pcie_conf_msix_hw(trans_pcie);
1185
1186 /*
1187 * Upon stop, the APM issues an interrupt if HW RF kill is set.
1188 * This is a bug in certain verions of the hardware.
1189 * Certain devices also keep sending HW RF kill interrupt all
1190 * the time, unless the interrupt is ACKed even if the interrupt
1191 * should be masked. Re-ACK all the interrupts here.
1192 */
1193 iwl_disable_interrupts(trans);
1194
1195 /* clear all status bits */
1196 clear_bit(STATUS_SYNC_HCMD_ACTIVE, &trans->status);
1197 clear_bit(STATUS_INT_ENABLED, &trans->status);
1198 clear_bit(STATUS_TPOWER_PMI, &trans->status);
1199
1200 /*
1201 * Even if we stop the HW, we still want the RF kill
1202 * interrupt
1203 */
1204 iwl_enable_rfkill_int(trans);
1205
1206 /* re-take ownership to prevent other users from stealing the device */
1207 iwl_pcie_prepare_card_hw(trans);
1208 }
1209
1210 void iwl_pcie_synchronize_irqs(struct iwl_trans *trans)
1211 {
1212 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1213
1214 if (trans_pcie->msix_enabled) {
1215 int i;
1216
1217 for (i = 0; i < trans_pcie->alloc_vecs; i++)
1218 synchronize_irq(trans_pcie->msix_entries[i].vector);
1219 } else {
1220 synchronize_irq(trans_pcie->pci_dev->irq);
1221 }
1222 }
1223
1224 static int iwl_trans_pcie_start_fw(struct iwl_trans *trans,
1225 const struct fw_img *fw, bool run_in_rfkill)
1226 {
1227 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1228 bool hw_rfkill;
1229 int ret;
1230
1231 /* This may fail if AMT took ownership of the device */
1232 if (iwl_pcie_prepare_card_hw(trans)) {
1233 IWL_WARN(trans, "Exit HW not ready\n");
1234 ret = -EIO;
1235 goto out;
1236 }
1237
1238 iwl_enable_rfkill_int(trans);
1239
1240 iwl_write32(trans, CSR_INT, 0xFFFFFFFF);
1241
1242 /*
1243 * We enabled the RF-Kill interrupt and the handler may very
1244 * well be running. Disable the interrupts to make sure no other
1245 * interrupt can be fired.
1246 */
1247 iwl_disable_interrupts(trans);
1248
1249 /* Make sure it finished running */
1250 iwl_pcie_synchronize_irqs(trans);
1251
1252 mutex_lock(&trans_pcie->mutex);
1253
1254 /* If platform's RF_KILL switch is NOT set to KILL */
1255 hw_rfkill = iwl_trans_check_hw_rf_kill(trans);
1256 if (hw_rfkill && !run_in_rfkill) {
1257 ret = -ERFKILL;
1258 goto out;
1259 }
1260
1261 /* Someone called stop_device, don't try to start_fw */
1262 if (trans_pcie->is_down) {
1263 IWL_WARN(trans,
1264 "Can't start_fw since the HW hasn't been started\n");
1265 ret = -EIO;
1266 goto out;
1267 }
1268
1269 /* make sure rfkill handshake bits are cleared */
1270 iwl_write32(trans, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1271 iwl_write32(trans, CSR_UCODE_DRV_GP1_CLR,
1272 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
1273
1274 /* clear (again), then enable host interrupts */
1275 iwl_write32(trans, CSR_INT, 0xFFFFFFFF);
1276
1277 ret = iwl_pcie_nic_init(trans);
1278 if (ret) {
1279 IWL_ERR(trans, "Unable to init nic\n");
1280 goto out;
1281 }
1282
1283 /*
1284 * Now, we load the firmware and don't want to be interrupted, even
1285 * by the RF-Kill interrupt (hence mask all the interrupt besides the
1286 * FH_TX interrupt which is needed to load the firmware). If the
1287 * RF-Kill switch is toggled, we will find out after having loaded
1288 * the firmware and return the proper value to the caller.
1289 */
1290 iwl_enable_fw_load_int(trans);
1291
1292 /* really make sure rfkill handshake bits are cleared */
1293 iwl_write32(trans, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1294 iwl_write32(trans, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1295
1296 /* Load the given image to the HW */
1297 if (trans->cfg->device_family >= IWL_DEVICE_FAMILY_8000)
1298 ret = iwl_pcie_load_given_ucode_8000(trans, fw);
1299 else
1300 ret = iwl_pcie_load_given_ucode(trans, fw);
1301
1302 /* re-check RF-Kill state since we may have missed the interrupt */
1303 hw_rfkill = iwl_trans_check_hw_rf_kill(trans);
1304 if (hw_rfkill && !run_in_rfkill)
1305 ret = -ERFKILL;
1306
1307 out:
1308 mutex_unlock(&trans_pcie->mutex);
1309 return ret;
1310 }
1311
1312 static void iwl_trans_pcie_fw_alive(struct iwl_trans *trans, u32 scd_addr)
1313 {
1314 iwl_pcie_reset_ict(trans);
1315 iwl_pcie_tx_start(trans, scd_addr);
1316 }
1317
1318 void iwl_trans_pcie_handle_stop_rfkill(struct iwl_trans *trans,
1319 bool was_in_rfkill)
1320 {
1321 bool hw_rfkill;
1322
1323 /*
1324 * Check again since the RF kill state may have changed while
1325 * all the interrupts were disabled, in this case we couldn't
1326 * receive the RF kill interrupt and update the state in the
1327 * op_mode.
1328 * Don't call the op_mode if the rkfill state hasn't changed.
1329 * This allows the op_mode to call stop_device from the rfkill
1330 * notification without endless recursion. Under very rare
1331 * circumstances, we might have a small recursion if the rfkill
1332 * state changed exactly now while we were called from stop_device.
1333 * This is very unlikely but can happen and is supported.
1334 */
1335 hw_rfkill = iwl_is_rfkill_set(trans);
1336 if (hw_rfkill) {
1337 set_bit(STATUS_RFKILL_HW, &trans->status);
1338 set_bit(STATUS_RFKILL_OPMODE, &trans->status);
1339 } else {
1340 clear_bit(STATUS_RFKILL_HW, &trans->status);
1341 clear_bit(STATUS_RFKILL_OPMODE, &trans->status);
1342 }
1343 if (hw_rfkill != was_in_rfkill)
1344 iwl_trans_pcie_rf_kill(trans, hw_rfkill);
1345 }
1346
1347 static void iwl_trans_pcie_stop_device(struct iwl_trans *trans, bool low_power)
1348 {
1349 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1350 bool was_in_rfkill;
1351
1352 mutex_lock(&trans_pcie->mutex);
1353 trans_pcie->opmode_down = true;
1354 was_in_rfkill = test_bit(STATUS_RFKILL_OPMODE, &trans->status);
1355 _iwl_trans_pcie_stop_device(trans, low_power);
1356 iwl_trans_pcie_handle_stop_rfkill(trans, was_in_rfkill);
1357 mutex_unlock(&trans_pcie->mutex);
1358 }
1359
1360 void iwl_trans_pcie_rf_kill(struct iwl_trans *trans, bool state)
1361 {
1362 struct iwl_trans_pcie __maybe_unused *trans_pcie =
1363 IWL_TRANS_GET_PCIE_TRANS(trans);
1364
1365 lockdep_assert_held(&trans_pcie->mutex);
1366
1367 IWL_WARN(trans, "reporting RF_KILL (radio %s)\n",
1368 state ? "disabled" : "enabled");
1369 if (iwl_op_mode_hw_rf_kill(trans->op_mode, state)) {
1370 if (trans->cfg->gen2)
1371 _iwl_trans_pcie_gen2_stop_device(trans, true);
1372 else
1373 _iwl_trans_pcie_stop_device(trans, true);
1374 }
1375 }
1376
1377 static void iwl_trans_pcie_d3_suspend(struct iwl_trans *trans, bool test,
1378 bool reset)
1379 {
1380 if (!reset) {
1381 /* Enable persistence mode to avoid reset */
1382 iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG,
1383 CSR_HW_IF_CONFIG_REG_PERSIST_MODE);
1384 }
1385
1386 iwl_disable_interrupts(trans);
1387
1388 /*
1389 * in testing mode, the host stays awake and the
1390 * hardware won't be reset (not even partially)
1391 */
1392 if (test)
1393 return;
1394
1395 iwl_pcie_disable_ict(trans);
1396
1397 iwl_pcie_synchronize_irqs(trans);
1398
1399 iwl_clear_bit(trans, CSR_GP_CNTRL,
1400 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
1401 iwl_clear_bit(trans, CSR_GP_CNTRL,
1402 CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1403
1404 iwl_pcie_enable_rx_wake(trans, false);
1405
1406 if (reset) {
1407 /*
1408 * reset TX queues -- some of their registers reset during S3
1409 * so if we don't reset everything here the D3 image would try
1410 * to execute some invalid memory upon resume
1411 */
1412 iwl_trans_pcie_tx_reset(trans);
1413 }
1414
1415 iwl_pcie_set_pwr(trans, true);
1416 }
1417
1418 static int iwl_trans_pcie_d3_resume(struct iwl_trans *trans,
1419 enum iwl_d3_status *status,
1420 bool test, bool reset)
1421 {
1422 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1423 u32 val;
1424 int ret;
1425
1426 if (test) {
1427 iwl_enable_interrupts(trans);
1428 *status = IWL_D3_STATUS_ALIVE;
1429 return 0;
1430 }
1431
1432 iwl_pcie_enable_rx_wake(trans, true);
1433
1434 /*
1435 * Reconfigure IVAR table in case of MSIX or reset ict table in
1436 * MSI mode since HW reset erased it.
1437 * Also enables interrupts - none will happen as
1438 * the device doesn't know we're waking it up, only when
1439 * the opmode actually tells it after this call.
1440 */
1441 iwl_pcie_conf_msix_hw(trans_pcie);
1442 if (!trans_pcie->msix_enabled)
1443 iwl_pcie_reset_ict(trans);
1444 iwl_enable_interrupts(trans);
1445
1446 iwl_set_bit(trans, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
1447 iwl_set_bit(trans, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1448
1449 if (trans->cfg->device_family >= IWL_DEVICE_FAMILY_8000)
1450 udelay(2);
1451
1452 ret = iwl_poll_bit(trans, CSR_GP_CNTRL,
1453 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
1454 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
1455 25000);
1456 if (ret < 0) {
1457 IWL_ERR(trans, "Failed to resume the device (mac ready)\n");
1458 return ret;
1459 }
1460
1461 iwl_pcie_set_pwr(trans, false);
1462
1463 if (!reset) {
1464 iwl_clear_bit(trans, CSR_GP_CNTRL,
1465 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
1466 } else {
1467 iwl_trans_pcie_tx_reset(trans);
1468
1469 ret = iwl_pcie_rx_init(trans);
1470 if (ret) {
1471 IWL_ERR(trans,
1472 "Failed to resume the device (RX reset)\n");
1473 return ret;
1474 }
1475 }
1476
1477 IWL_DEBUG_POWER(trans, "WFPM value upon resume = 0x%08X\n",
1478 iwl_read_prph(trans, WFPM_GP2));
1479
1480 val = iwl_read32(trans, CSR_RESET);
1481 if (val & CSR_RESET_REG_FLAG_NEVO_RESET)
1482 *status = IWL_D3_STATUS_RESET;
1483 else
1484 *status = IWL_D3_STATUS_ALIVE;
1485
1486 return 0;
1487 }
1488
1489 static void iwl_pcie_set_interrupt_capa(struct pci_dev *pdev,
1490 struct iwl_trans *trans)
1491 {
1492 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1493 int max_irqs, num_irqs, i, ret, nr_online_cpus;
1494 u16 pci_cmd;
1495
1496 if (!trans->cfg->mq_rx_supported)
1497 goto enable_msi;
1498
1499 nr_online_cpus = num_online_cpus();
1500 max_irqs = min_t(u32, nr_online_cpus + 2, IWL_MAX_RX_HW_QUEUES);
1501 for (i = 0; i < max_irqs; i++)
1502 trans_pcie->msix_entries[i].entry = i;
1503
1504 num_irqs = pci_enable_msix_range(pdev, trans_pcie->msix_entries,
1505 MSIX_MIN_INTERRUPT_VECTORS,
1506 max_irqs);
1507 if (num_irqs < 0) {
1508 IWL_DEBUG_INFO(trans,
1509 "Failed to enable msi-x mode (ret %d). Moving to msi mode.\n",
1510 num_irqs);
1511 goto enable_msi;
1512 }
1513 trans_pcie->def_irq = (num_irqs == max_irqs) ? num_irqs - 1 : 0;
1514
1515 IWL_DEBUG_INFO(trans,
1516 "MSI-X enabled. %d interrupt vectors were allocated\n",
1517 num_irqs);
1518
1519 /*
1520 * In case the OS provides fewer interrupts than requested, different
1521 * causes will share the same interrupt vector as follows:
1522 * One interrupt less: non rx causes shared with FBQ.
1523 * Two interrupts less: non rx causes shared with FBQ and RSS.
1524 * More than two interrupts: we will use fewer RSS queues.
1525 */
1526 if (num_irqs <= nr_online_cpus) {
1527 trans_pcie->trans->num_rx_queues = num_irqs + 1;
1528 trans_pcie->shared_vec_mask = IWL_SHARED_IRQ_NON_RX |
1529 IWL_SHARED_IRQ_FIRST_RSS;
1530 } else if (num_irqs == nr_online_cpus + 1) {
1531 trans_pcie->trans->num_rx_queues = num_irqs;
1532 trans_pcie->shared_vec_mask = IWL_SHARED_IRQ_NON_RX;
1533 } else {
1534 trans_pcie->trans->num_rx_queues = num_irqs - 1;
1535 }
1536
1537 trans_pcie->alloc_vecs = num_irqs;
1538 trans_pcie->msix_enabled = true;
1539 return;
1540
1541 enable_msi:
1542 ret = pci_enable_msi(pdev);
1543 if (ret) {
1544 dev_err(&pdev->dev, "pci_enable_msi failed - %d\n", ret);
1545 /* enable rfkill interrupt: hw bug w/a */
1546 pci_read_config_word(pdev, PCI_COMMAND, &pci_cmd);
1547 if (pci_cmd & PCI_COMMAND_INTX_DISABLE) {
1548 pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
1549 pci_write_config_word(pdev, PCI_COMMAND, pci_cmd);
1550 }
1551 }
1552 }
1553
1554 static void iwl_pcie_irq_set_affinity(struct iwl_trans *trans)
1555 {
1556 int iter_rx_q, i, ret, cpu, offset;
1557 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1558
1559 i = trans_pcie->shared_vec_mask & IWL_SHARED_IRQ_FIRST_RSS ? 0 : 1;
1560 iter_rx_q = trans_pcie->trans->num_rx_queues - 1 + i;
1561 offset = 1 + i;
1562 for (; i < iter_rx_q ; i++) {
1563 /*
1564 * Get the cpu prior to the place to search
1565 * (i.e. return will be > i - 1).
1566 */
1567 cpu = cpumask_next(i - offset, cpu_online_mask);
1568 cpumask_set_cpu(cpu, &trans_pcie->affinity_mask[i]);
1569 ret = irq_set_affinity_hint(trans_pcie->msix_entries[i].vector,
1570 &trans_pcie->affinity_mask[i]);
1571 if (ret)
1572 IWL_ERR(trans_pcie->trans,
1573 "Failed to set affinity mask for IRQ %d\n",
1574 i);
1575 }
1576 }
1577
1578 static const char *queue_name(struct device *dev,
1579 struct iwl_trans_pcie *trans_p, int i)
1580 {
1581 if (trans_p->shared_vec_mask) {
1582 int vec = trans_p->shared_vec_mask &
1583 IWL_SHARED_IRQ_FIRST_RSS ? 1 : 0;
1584
1585 if (i == 0)
1586 return DRV_NAME ": shared IRQ";
1587
1588 return devm_kasprintf(dev, GFP_KERNEL,
1589 DRV_NAME ": queue %d", i + vec);
1590 }
1591 if (i == 0)
1592 return DRV_NAME ": default queue";
1593
1594 if (i == trans_p->alloc_vecs - 1)
1595 return DRV_NAME ": exception";
1596
1597 return devm_kasprintf(dev, GFP_KERNEL,
1598 DRV_NAME ": queue %d", i);
1599 }
1600
1601 static int iwl_pcie_init_msix_handler(struct pci_dev *pdev,
1602 struct iwl_trans_pcie *trans_pcie)
1603 {
1604 int i;
1605
1606 for (i = 0; i < trans_pcie->alloc_vecs; i++) {
1607 int ret;
1608 struct msix_entry *msix_entry;
1609 const char *qname = queue_name(&pdev->dev, trans_pcie, i);
1610
1611 if (!qname)
1612 return -ENOMEM;
1613
1614 msix_entry = &trans_pcie->msix_entries[i];
1615 ret = devm_request_threaded_irq(&pdev->dev,
1616 msix_entry->vector,
1617 iwl_pcie_msix_isr,
1618 (i == trans_pcie->def_irq) ?
1619 iwl_pcie_irq_msix_handler :
1620 iwl_pcie_irq_rx_msix_handler,
1621 IRQF_SHARED,
1622 qname,
1623 msix_entry);
1624 if (ret) {
1625 IWL_ERR(trans_pcie->trans,
1626 "Error allocating IRQ %d\n", i);
1627
1628 return ret;
1629 }
1630 }
1631 iwl_pcie_irq_set_affinity(trans_pcie->trans);
1632
1633 return 0;
1634 }
1635
1636 static int _iwl_trans_pcie_start_hw(struct iwl_trans *trans, bool low_power)
1637 {
1638 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1639 int err;
1640
1641 lockdep_assert_held(&trans_pcie->mutex);
1642
1643 err = iwl_pcie_prepare_card_hw(trans);
1644 if (err) {
1645 IWL_ERR(trans, "Error while preparing HW: %d\n", err);
1646 return err;
1647 }
1648
1649 iwl_pcie_sw_reset(trans);
1650
1651 err = iwl_pcie_apm_init(trans);
1652 if (err)
1653 return err;
1654
1655 iwl_pcie_init_msix(trans_pcie);
1656
1657 /* From now on, the op_mode will be kept updated about RF kill state */
1658 iwl_enable_rfkill_int(trans);
1659
1660 trans_pcie->opmode_down = false;
1661
1662 /* Set is_down to false here so that...*/
1663 trans_pcie->is_down = false;
1664
1665 /* ...rfkill can call stop_device and set it false if needed */
1666 iwl_trans_check_hw_rf_kill(trans);
1667
1668 /* Make sure we sync here, because we'll need full access later */
1669 if (low_power)
1670 pm_runtime_resume(trans->dev);
1671
1672 return 0;
1673 }
1674
1675 static int iwl_trans_pcie_start_hw(struct iwl_trans *trans, bool low_power)
1676 {
1677 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1678 int ret;
1679
1680 mutex_lock(&trans_pcie->mutex);
1681 ret = _iwl_trans_pcie_start_hw(trans, low_power);
1682 mutex_unlock(&trans_pcie->mutex);
1683
1684 return ret;
1685 }
1686
1687 static void iwl_trans_pcie_op_mode_leave(struct iwl_trans *trans)
1688 {
1689 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1690
1691 mutex_lock(&trans_pcie->mutex);
1692
1693 /* disable interrupts - don't enable HW RF kill interrupt */
1694 iwl_disable_interrupts(trans);
1695
1696 iwl_pcie_apm_stop(trans, true);
1697
1698 iwl_disable_interrupts(trans);
1699
1700 iwl_pcie_disable_ict(trans);
1701
1702 mutex_unlock(&trans_pcie->mutex);
1703
1704 iwl_pcie_synchronize_irqs(trans);
1705 }
1706
1707 static void iwl_trans_pcie_write8(struct iwl_trans *trans, u32 ofs, u8 val)
1708 {
1709 writeb(val, IWL_TRANS_GET_PCIE_TRANS(trans)->hw_base + ofs);
1710 }
1711
1712 static void iwl_trans_pcie_write32(struct iwl_trans *trans, u32 ofs, u32 val)
1713 {
1714 writel(val, IWL_TRANS_GET_PCIE_TRANS(trans)->hw_base + ofs);
1715 }
1716
1717 static u32 iwl_trans_pcie_read32(struct iwl_trans *trans, u32 ofs)
1718 {
1719 return readl(IWL_TRANS_GET_PCIE_TRANS(trans)->hw_base + ofs);
1720 }
1721
1722 static u32 iwl_trans_pcie_read_prph(struct iwl_trans *trans, u32 reg)
1723 {
1724 iwl_trans_pcie_write32(trans, HBUS_TARG_PRPH_RADDR,
1725 ((reg & 0x000FFFFF) | (3 << 24)));
1726 return iwl_trans_pcie_read32(trans, HBUS_TARG_PRPH_RDAT);
1727 }
1728
1729 static void iwl_trans_pcie_write_prph(struct iwl_trans *trans, u32 addr,
1730 u32 val)
1731 {
1732 iwl_trans_pcie_write32(trans, HBUS_TARG_PRPH_WADDR,
1733 ((addr & 0x000FFFFF) | (3 << 24)));
1734 iwl_trans_pcie_write32(trans, HBUS_TARG_PRPH_WDAT, val);
1735 }
1736
1737 static void iwl_trans_pcie_configure(struct iwl_trans *trans,
1738 const struct iwl_trans_config *trans_cfg)
1739 {
1740 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1741
1742 trans_pcie->cmd_queue = trans_cfg->cmd_queue;
1743 trans_pcie->cmd_fifo = trans_cfg->cmd_fifo;
1744 trans_pcie->cmd_q_wdg_timeout = trans_cfg->cmd_q_wdg_timeout;
1745 if (WARN_ON(trans_cfg->n_no_reclaim_cmds > MAX_NO_RECLAIM_CMDS))
1746 trans_pcie->n_no_reclaim_cmds = 0;
1747 else
1748 trans_pcie->n_no_reclaim_cmds = trans_cfg->n_no_reclaim_cmds;
1749 if (trans_pcie->n_no_reclaim_cmds)
1750 memcpy(trans_pcie->no_reclaim_cmds, trans_cfg->no_reclaim_cmds,
1751 trans_pcie->n_no_reclaim_cmds * sizeof(u8));
1752
1753 trans_pcie->rx_buf_size = trans_cfg->rx_buf_size;
1754 trans_pcie->rx_page_order =
1755 iwl_trans_get_rb_size_order(trans_pcie->rx_buf_size);
1756
1757 trans_pcie->bc_table_dword = trans_cfg->bc_table_dword;
1758 trans_pcie->scd_set_active = trans_cfg->scd_set_active;
1759 trans_pcie->sw_csum_tx = trans_cfg->sw_csum_tx;
1760
1761 trans_pcie->page_offs = trans_cfg->cb_data_offs;
1762 trans_pcie->dev_cmd_offs = trans_cfg->cb_data_offs + sizeof(void *);
1763
1764 trans->command_groups = trans_cfg->command_groups;
1765 trans->command_groups_size = trans_cfg->command_groups_size;
1766
1767 /* Initialize NAPI here - it should be before registering to mac80211
1768 * in the opmode but after the HW struct is allocated.
1769 * As this function may be called again in some corner cases don't
1770 * do anything if NAPI was already initialized.
1771 */
1772 if (trans_pcie->napi_dev.reg_state != NETREG_DUMMY)
1773 init_dummy_netdev(&trans_pcie->napi_dev);
1774 }
1775
1776 void iwl_trans_pcie_free(struct iwl_trans *trans)
1777 {
1778 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1779 int i;
1780
1781 iwl_pcie_synchronize_irqs(trans);
1782
1783 if (trans->cfg->gen2)
1784 iwl_pcie_gen2_tx_free(trans);
1785 else
1786 iwl_pcie_tx_free(trans);
1787 iwl_pcie_rx_free(trans);
1788
1789 if (trans_pcie->msix_enabled) {
1790 for (i = 0; i < trans_pcie->alloc_vecs; i++) {
1791 irq_set_affinity_hint(
1792 trans_pcie->msix_entries[i].vector,
1793 NULL);
1794 }
1795
1796 trans_pcie->msix_enabled = false;
1797 } else {
1798 iwl_pcie_free_ict(trans);
1799 }
1800
1801 iwl_pcie_free_fw_monitor(trans);
1802
1803 for_each_possible_cpu(i) {
1804 struct iwl_tso_hdr_page *p =
1805 per_cpu_ptr(trans_pcie->tso_hdr_page, i);
1806
1807 if (p->page)
1808 __free_page(p->page);
1809 }
1810
1811 free_percpu(trans_pcie->tso_hdr_page);
1812 mutex_destroy(&trans_pcie->mutex);
1813 iwl_trans_free(trans);
1814 }
1815
1816 static void iwl_trans_pcie_set_pmi(struct iwl_trans *trans, bool state)
1817 {
1818 if (state)
1819 set_bit(STATUS_TPOWER_PMI, &trans->status);
1820 else
1821 clear_bit(STATUS_TPOWER_PMI, &trans->status);
1822 }
1823
1824 static bool iwl_trans_pcie_grab_nic_access(struct iwl_trans *trans,
1825 unsigned long *flags)
1826 {
1827 int ret;
1828 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1829
1830 spin_lock_irqsave(&trans_pcie->reg_lock, *flags);
1831
1832 if (trans_pcie->cmd_hold_nic_awake)
1833 goto out;
1834
1835 /* this bit wakes up the NIC */
1836 __iwl_trans_pcie_set_bit(trans, CSR_GP_CNTRL,
1837 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
1838 if (trans->cfg->device_family >= IWL_DEVICE_FAMILY_8000)
1839 udelay(2);
1840
1841 /*
1842 * These bits say the device is running, and should keep running for
1843 * at least a short while (at least as long as MAC_ACCESS_REQ stays 1),
1844 * but they do not indicate that embedded SRAM is restored yet;
1845 * 3945 and 4965 have volatile SRAM, and must save/restore contents
1846 * to/from host DRAM when sleeping/waking for power-saving.
1847 * Each direction takes approximately 1/4 millisecond; with this
1848 * overhead, it's a good idea to grab and hold MAC_ACCESS_REQUEST if a
1849 * series of register accesses are expected (e.g. reading Event Log),
1850 * to keep device from sleeping.
1851 *
1852 * CSR_UCODE_DRV_GP1 register bit MAC_SLEEP == 0 indicates that
1853 * SRAM is okay/restored. We don't check that here because this call
1854 * is just for hardware register access; but GP1 MAC_SLEEP check is a
1855 * good idea before accessing 3945/4965 SRAM (e.g. reading Event Log).
1856 *
1857 * 5000 series and later (including 1000 series) have non-volatile SRAM,
1858 * and do not save/restore SRAM when power cycling.
1859 */
1860 ret = iwl_poll_bit(trans, CSR_GP_CNTRL,
1861 CSR_GP_CNTRL_REG_VAL_MAC_ACCESS_EN,
1862 (CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY |
1863 CSR_GP_CNTRL_REG_FLAG_GOING_TO_SLEEP), 15000);
1864 if (unlikely(ret < 0)) {
1865 iwl_write32(trans, CSR_RESET, CSR_RESET_REG_FLAG_FORCE_NMI);
1866 WARN_ONCE(1,
1867 "Timeout waiting for hardware access (CSR_GP_CNTRL 0x%08x)\n",
1868 iwl_read32(trans, CSR_GP_CNTRL));
1869 spin_unlock_irqrestore(&trans_pcie->reg_lock, *flags);
1870 return false;
1871 }
1872
1873 out:
1874 /*
1875 * Fool sparse by faking we release the lock - sparse will
1876 * track nic_access anyway.
1877 */
1878 __release(&trans_pcie->reg_lock);
1879 return true;
1880 }
1881
1882 static void iwl_trans_pcie_release_nic_access(struct iwl_trans *trans,
1883 unsigned long *flags)
1884 {
1885 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1886
1887 lockdep_assert_held(&trans_pcie->reg_lock);
1888
1889 /*
1890 * Fool sparse by faking we acquiring the lock - sparse will
1891 * track nic_access anyway.
1892 */
1893 __acquire(&trans_pcie->reg_lock);
1894
1895 if (trans_pcie->cmd_hold_nic_awake)
1896 goto out;
1897
1898 __iwl_trans_pcie_clear_bit(trans, CSR_GP_CNTRL,
1899 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
1900 /*
1901 * Above we read the CSR_GP_CNTRL register, which will flush
1902 * any previous writes, but we need the write that clears the
1903 * MAC_ACCESS_REQ bit to be performed before any other writes
1904 * scheduled on different CPUs (after we drop reg_lock).
1905 */
1906 mmiowb();
1907 out:
1908 spin_unlock_irqrestore(&trans_pcie->reg_lock, *flags);
1909 }
1910
1911 static int iwl_trans_pcie_read_mem(struct iwl_trans *trans, u32 addr,
1912 void *buf, int dwords)
1913 {
1914 unsigned long flags;
1915 int offs, ret = 0;
1916 u32 *vals = buf;
1917
1918 if (iwl_trans_grab_nic_access(trans, &flags)) {
1919 iwl_write32(trans, HBUS_TARG_MEM_RADDR, addr);
1920 for (offs = 0; offs < dwords; offs++)
1921 vals[offs] = iwl_read32(trans, HBUS_TARG_MEM_RDAT);
1922 iwl_trans_release_nic_access(trans, &flags);
1923 } else {
1924 ret = -EBUSY;
1925 }
1926 return ret;
1927 }
1928
1929 static int iwl_trans_pcie_write_mem(struct iwl_trans *trans, u32 addr,
1930 const void *buf, int dwords)
1931 {
1932 unsigned long flags;
1933 int offs, ret = 0;
1934 const u32 *vals = buf;
1935
1936 if (iwl_trans_grab_nic_access(trans, &flags)) {
1937 iwl_write32(trans, HBUS_TARG_MEM_WADDR, addr);
1938 for (offs = 0; offs < dwords; offs++)
1939 iwl_write32(trans, HBUS_TARG_MEM_WDAT,
1940 vals ? vals[offs] : 0);
1941 iwl_trans_release_nic_access(trans, &flags);
1942 } else {
1943 ret = -EBUSY;
1944 }
1945 return ret;
1946 }
1947
1948 static void iwl_trans_pcie_freeze_txq_timer(struct iwl_trans *trans,
1949 unsigned long txqs,
1950 bool freeze)
1951 {
1952 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1953 int queue;
1954
1955 for_each_set_bit(queue, &txqs, BITS_PER_LONG) {
1956 struct iwl_txq *txq = trans_pcie->txq[queue];
1957 unsigned long now;
1958
1959 spin_lock_bh(&txq->lock);
1960
1961 now = jiffies;
1962
1963 if (txq->frozen == freeze)
1964 goto next_queue;
1965
1966 IWL_DEBUG_TX_QUEUES(trans, "%s TXQ %d\n",
1967 freeze ? "Freezing" : "Waking", queue);
1968
1969 txq->frozen = freeze;
1970
1971 if (txq->read_ptr == txq->write_ptr)
1972 goto next_queue;
1973
1974 if (freeze) {
1975 if (unlikely(time_after(now,
1976 txq->stuck_timer.expires))) {
1977 /*
1978 * The timer should have fired, maybe it is
1979 * spinning right now on the lock.
1980 */
1981 goto next_queue;
1982 }
1983 /* remember how long until the timer fires */
1984 txq->frozen_expiry_remainder =
1985 txq->stuck_timer.expires - now;
1986 del_timer(&txq->stuck_timer);
1987 goto next_queue;
1988 }
1989
1990 /*
1991 * Wake a non-empty queue -> arm timer with the
1992 * remainder before it froze
1993 */
1994 mod_timer(&txq->stuck_timer,
1995 now + txq->frozen_expiry_remainder);
1996
1997 next_queue:
1998 spin_unlock_bh(&txq->lock);
1999 }
2000 }
2001
2002 static void iwl_trans_pcie_block_txq_ptrs(struct iwl_trans *trans, bool block)
2003 {
2004 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2005 int i;
2006
2007 for (i = 0; i < trans->cfg->base_params->num_of_queues; i++) {
2008 struct iwl_txq *txq = trans_pcie->txq[i];
2009
2010 if (i == trans_pcie->cmd_queue)
2011 continue;
2012
2013 spin_lock_bh(&txq->lock);
2014
2015 if (!block && !(WARN_ON_ONCE(!txq->block))) {
2016 txq->block--;
2017 if (!txq->block) {
2018 iwl_write32(trans, HBUS_TARG_WRPTR,
2019 txq->write_ptr | (i << 8));
2020 }
2021 } else if (block) {
2022 txq->block++;
2023 }
2024
2025 spin_unlock_bh(&txq->lock);
2026 }
2027 }
2028
2029 #define IWL_FLUSH_WAIT_MS 2000
2030
2031 void iwl_trans_pcie_log_scd_error(struct iwl_trans *trans, struct iwl_txq *txq)
2032 {
2033 u32 txq_id = txq->id;
2034 u32 status;
2035 bool active;
2036 u8 fifo;
2037
2038 if (trans->cfg->use_tfh) {
2039 IWL_ERR(trans, "Queue %d is stuck %d %d\n", txq_id,
2040 txq->read_ptr, txq->write_ptr);
2041 /* TODO: access new SCD registers and dump them */
2042 return;
2043 }
2044
2045 status = iwl_read_prph(trans, SCD_QUEUE_STATUS_BITS(txq_id));
2046 fifo = (status >> SCD_QUEUE_STTS_REG_POS_TXF) & 0x7;
2047 active = !!(status & BIT(SCD_QUEUE_STTS_REG_POS_ACTIVE));
2048
2049 IWL_ERR(trans,
2050 "Queue %d is %sactive on fifo %d and stuck for %u ms. SW [%d, %d] HW [%d, %d] FH TRB=0x0%x\n",
2051 txq_id, active ? "" : "in", fifo,
2052 jiffies_to_msecs(txq->wd_timeout),
2053 txq->read_ptr, txq->write_ptr,
2054 iwl_read_prph(trans, SCD_QUEUE_RDPTR(txq_id)) &
2055 (TFD_QUEUE_SIZE_MAX - 1),
2056 iwl_read_prph(trans, SCD_QUEUE_WRPTR(txq_id)) &
2057 (TFD_QUEUE_SIZE_MAX - 1),
2058 iwl_read_direct32(trans, FH_TX_TRB_REG(fifo)));
2059 }
2060
2061 static int iwl_trans_pcie_wait_txq_empty(struct iwl_trans *trans, int txq_idx)
2062 {
2063 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2064 struct iwl_txq *txq;
2065 unsigned long now = jiffies;
2066 u8 wr_ptr;
2067
2068 if (!test_bit(txq_idx, trans_pcie->queue_used))
2069 return -EINVAL;
2070
2071 IWL_DEBUG_TX_QUEUES(trans, "Emptying queue %d...\n", txq_idx);
2072 txq = trans_pcie->txq[txq_idx];
2073 wr_ptr = ACCESS_ONCE(txq->write_ptr);
2074
2075 while (txq->read_ptr != ACCESS_ONCE(txq->write_ptr) &&
2076 !time_after(jiffies,
2077 now + msecs_to_jiffies(IWL_FLUSH_WAIT_MS))) {
2078 u8 write_ptr = ACCESS_ONCE(txq->write_ptr);
2079
2080 if (WARN_ONCE(wr_ptr != write_ptr,
2081 "WR pointer moved while flushing %d -> %d\n",
2082 wr_ptr, write_ptr))
2083 return -ETIMEDOUT;
2084 usleep_range(1000, 2000);
2085 }
2086
2087 if (txq->read_ptr != txq->write_ptr) {
2088 IWL_ERR(trans,
2089 "fail to flush all tx fifo queues Q %d\n", txq_idx);
2090 iwl_trans_pcie_log_scd_error(trans, txq);
2091 return -ETIMEDOUT;
2092 }
2093
2094 IWL_DEBUG_TX_QUEUES(trans, "Queue %d is now empty.\n", txq_idx);
2095
2096 return 0;
2097 }
2098
2099 static int iwl_trans_pcie_wait_txqs_empty(struct iwl_trans *trans, u32 txq_bm)
2100 {
2101 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2102 int cnt;
2103 int ret = 0;
2104
2105 /* waiting for all the tx frames complete might take a while */
2106 for (cnt = 0; cnt < trans->cfg->base_params->num_of_queues; cnt++) {
2107
2108 if (cnt == trans_pcie->cmd_queue)
2109 continue;
2110 if (!test_bit(cnt, trans_pcie->queue_used))
2111 continue;
2112 if (!(BIT(cnt) & txq_bm))
2113 continue;
2114
2115 ret = iwl_trans_pcie_wait_txq_empty(trans, cnt);
2116 if (ret)
2117 break;
2118 }
2119
2120 return ret;
2121 }
2122
2123 static void iwl_trans_pcie_set_bits_mask(struct iwl_trans *trans, u32 reg,
2124 u32 mask, u32 value)
2125 {
2126 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2127 unsigned long flags;
2128
2129 spin_lock_irqsave(&trans_pcie->reg_lock, flags);
2130 __iwl_trans_pcie_set_bits_mask(trans, reg, mask, value);
2131 spin_unlock_irqrestore(&trans_pcie->reg_lock, flags);
2132 }
2133
2134 static void iwl_trans_pcie_ref(struct iwl_trans *trans)
2135 {
2136 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2137
2138 if (iwlwifi_mod_params.d0i3_disable)
2139 return;
2140
2141 pm_runtime_get(&trans_pcie->pci_dev->dev);
2142
2143 #ifdef CONFIG_PM
2144 IWL_DEBUG_RPM(trans, "runtime usage count: %d\n",
2145 atomic_read(&trans_pcie->pci_dev->dev.power.usage_count));
2146 #endif /* CONFIG_PM */
2147 }
2148
2149 static void iwl_trans_pcie_unref(struct iwl_trans *trans)
2150 {
2151 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2152
2153 if (iwlwifi_mod_params.d0i3_disable)
2154 return;
2155
2156 pm_runtime_mark_last_busy(&trans_pcie->pci_dev->dev);
2157 pm_runtime_put_autosuspend(&trans_pcie->pci_dev->dev);
2158
2159 #ifdef CONFIG_PM
2160 IWL_DEBUG_RPM(trans, "runtime usage count: %d\n",
2161 atomic_read(&trans_pcie->pci_dev->dev.power.usage_count));
2162 #endif /* CONFIG_PM */
2163 }
2164
2165 static const char *get_csr_string(int cmd)
2166 {
2167 #define IWL_CMD(x) case x: return #x
2168 switch (cmd) {
2169 IWL_CMD(CSR_HW_IF_CONFIG_REG);
2170 IWL_CMD(CSR_INT_COALESCING);
2171 IWL_CMD(CSR_INT);
2172 IWL_CMD(CSR_INT_MASK);
2173 IWL_CMD(CSR_FH_INT_STATUS);
2174 IWL_CMD(CSR_GPIO_IN);
2175 IWL_CMD(CSR_RESET);
2176 IWL_CMD(CSR_GP_CNTRL);
2177 IWL_CMD(CSR_HW_REV);
2178 IWL_CMD(CSR_EEPROM_REG);
2179 IWL_CMD(CSR_EEPROM_GP);
2180 IWL_CMD(CSR_OTP_GP_REG);
2181 IWL_CMD(CSR_GIO_REG);
2182 IWL_CMD(CSR_GP_UCODE_REG);
2183 IWL_CMD(CSR_GP_DRIVER_REG);
2184 IWL_CMD(CSR_UCODE_DRV_GP1);
2185 IWL_CMD(CSR_UCODE_DRV_GP2);
2186 IWL_CMD(CSR_LED_REG);
2187 IWL_CMD(CSR_DRAM_INT_TBL_REG);
2188 IWL_CMD(CSR_GIO_CHICKEN_BITS);
2189 IWL_CMD(CSR_ANA_PLL_CFG);
2190 IWL_CMD(CSR_HW_REV_WA_REG);
2191 IWL_CMD(CSR_MONITOR_STATUS_REG);
2192 IWL_CMD(CSR_DBG_HPET_MEM_REG);
2193 default:
2194 return "UNKNOWN";
2195 }
2196 #undef IWL_CMD
2197 }
2198
2199 void iwl_pcie_dump_csr(struct iwl_trans *trans)
2200 {
2201 int i;
2202 static const u32 csr_tbl[] = {
2203 CSR_HW_IF_CONFIG_REG,
2204 CSR_INT_COALESCING,
2205 CSR_INT,
2206 CSR_INT_MASK,
2207 CSR_FH_INT_STATUS,
2208 CSR_GPIO_IN,
2209 CSR_RESET,
2210 CSR_GP_CNTRL,
2211 CSR_HW_REV,
2212 CSR_EEPROM_REG,
2213 CSR_EEPROM_GP,
2214 CSR_OTP_GP_REG,
2215 CSR_GIO_REG,
2216 CSR_GP_UCODE_REG,
2217 CSR_GP_DRIVER_REG,
2218 CSR_UCODE_DRV_GP1,
2219 CSR_UCODE_DRV_GP2,
2220 CSR_LED_REG,
2221 CSR_DRAM_INT_TBL_REG,
2222 CSR_GIO_CHICKEN_BITS,
2223 CSR_ANA_PLL_CFG,
2224 CSR_MONITOR_STATUS_REG,
2225 CSR_HW_REV_WA_REG,
2226 CSR_DBG_HPET_MEM_REG
2227 };
2228 IWL_ERR(trans, "CSR values:\n");
2229 IWL_ERR(trans, "(2nd byte of CSR_INT_COALESCING is "
2230 "CSR_INT_PERIODIC_REG)\n");
2231 for (i = 0; i < ARRAY_SIZE(csr_tbl); i++) {
2232 IWL_ERR(trans, " %25s: 0X%08x\n",
2233 get_csr_string(csr_tbl[i]),
2234 iwl_read32(trans, csr_tbl[i]));
2235 }
2236 }
2237
2238 #ifdef CONFIG_IWLWIFI_DEBUGFS
2239 /* create and remove of files */
2240 #define DEBUGFS_ADD_FILE(name, parent, mode) do { \
2241 if (!debugfs_create_file(#name, mode, parent, trans, \
2242 &iwl_dbgfs_##name##_ops)) \
2243 goto err; \
2244 } while (0)
2245
2246 /* file operation */
2247 #define DEBUGFS_READ_FILE_OPS(name) \
2248 static const struct file_operations iwl_dbgfs_##name##_ops = { \
2249 .read = iwl_dbgfs_##name##_read, \
2250 .open = simple_open, \
2251 .llseek = generic_file_llseek, \
2252 };
2253
2254 #define DEBUGFS_WRITE_FILE_OPS(name) \
2255 static const struct file_operations iwl_dbgfs_##name##_ops = { \
2256 .write = iwl_dbgfs_##name##_write, \
2257 .open = simple_open, \
2258 .llseek = generic_file_llseek, \
2259 };
2260
2261 #define DEBUGFS_READ_WRITE_FILE_OPS(name) \
2262 static const struct file_operations iwl_dbgfs_##name##_ops = { \
2263 .write = iwl_dbgfs_##name##_write, \
2264 .read = iwl_dbgfs_##name##_read, \
2265 .open = simple_open, \
2266 .llseek = generic_file_llseek, \
2267 };
2268
2269 static ssize_t iwl_dbgfs_tx_queue_read(struct file *file,
2270 char __user *user_buf,
2271 size_t count, loff_t *ppos)
2272 {
2273 struct iwl_trans *trans = file->private_data;
2274 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2275 struct iwl_txq *txq;
2276 char *buf;
2277 int pos = 0;
2278 int cnt;
2279 int ret;
2280 size_t bufsz;
2281
2282 bufsz = sizeof(char) * 75 * trans->cfg->base_params->num_of_queues;
2283
2284 if (!trans_pcie->txq_memory)
2285 return -EAGAIN;
2286
2287 buf = kzalloc(bufsz, GFP_KERNEL);
2288 if (!buf)
2289 return -ENOMEM;
2290
2291 for (cnt = 0; cnt < trans->cfg->base_params->num_of_queues; cnt++) {
2292 txq = trans_pcie->txq[cnt];
2293 pos += scnprintf(buf + pos, bufsz - pos,
2294 "hwq %.2d: read=%u write=%u use=%d stop=%d need_update=%d frozen=%d%s\n",
2295 cnt, txq->read_ptr, txq->write_ptr,
2296 !!test_bit(cnt, trans_pcie->queue_used),
2297 !!test_bit(cnt, trans_pcie->queue_stopped),
2298 txq->need_update, txq->frozen,
2299 (cnt == trans_pcie->cmd_queue ? " HCMD" : ""));
2300 }
2301 ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
2302 kfree(buf);
2303 return ret;
2304 }
2305
2306 static ssize_t iwl_dbgfs_rx_queue_read(struct file *file,
2307 char __user *user_buf,
2308 size_t count, loff_t *ppos)
2309 {
2310 struct iwl_trans *trans = file->private_data;
2311 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2312 char *buf;
2313 int pos = 0, i, ret;
2314 size_t bufsz = sizeof(buf);
2315
2316 bufsz = sizeof(char) * 121 * trans->num_rx_queues;
2317
2318 if (!trans_pcie->rxq)
2319 return -EAGAIN;
2320
2321 buf = kzalloc(bufsz, GFP_KERNEL);
2322 if (!buf)
2323 return -ENOMEM;
2324
2325 for (i = 0; i < trans->num_rx_queues && pos < bufsz; i++) {
2326 struct iwl_rxq *rxq = &trans_pcie->rxq[i];
2327
2328 pos += scnprintf(buf + pos, bufsz - pos, "queue#: %2d\n",
2329 i);
2330 pos += scnprintf(buf + pos, bufsz - pos, "\tread: %u\n",
2331 rxq->read);
2332 pos += scnprintf(buf + pos, bufsz - pos, "\twrite: %u\n",
2333 rxq->write);
2334 pos += scnprintf(buf + pos, bufsz - pos, "\twrite_actual: %u\n",
2335 rxq->write_actual);
2336 pos += scnprintf(buf + pos, bufsz - pos, "\tneed_update: %2d\n",
2337 rxq->need_update);
2338 pos += scnprintf(buf + pos, bufsz - pos, "\tfree_count: %u\n",
2339 rxq->free_count);
2340 if (rxq->rb_stts) {
2341 pos += scnprintf(buf + pos, bufsz - pos,
2342 "\tclosed_rb_num: %u\n",
2343 le16_to_cpu(rxq->rb_stts->closed_rb_num) &
2344 0x0FFF);
2345 } else {
2346 pos += scnprintf(buf + pos, bufsz - pos,
2347 "\tclosed_rb_num: Not Allocated\n");
2348 }
2349 }
2350 ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
2351 kfree(buf);
2352
2353 return ret;
2354 }
2355
2356 static ssize_t iwl_dbgfs_interrupt_read(struct file *file,
2357 char __user *user_buf,
2358 size_t count, loff_t *ppos)
2359 {
2360 struct iwl_trans *trans = file->private_data;
2361 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2362 struct isr_statistics *isr_stats = &trans_pcie->isr_stats;
2363
2364 int pos = 0;
2365 char *buf;
2366 int bufsz = 24 * 64; /* 24 items * 64 char per item */
2367 ssize_t ret;
2368
2369 buf = kzalloc(bufsz, GFP_KERNEL);
2370 if (!buf)
2371 return -ENOMEM;
2372
2373 pos += scnprintf(buf + pos, bufsz - pos,
2374 "Interrupt Statistics Report:\n");
2375
2376 pos += scnprintf(buf + pos, bufsz - pos, "HW Error:\t\t\t %u\n",
2377 isr_stats->hw);
2378 pos += scnprintf(buf + pos, bufsz - pos, "SW Error:\t\t\t %u\n",
2379 isr_stats->sw);
2380 if (isr_stats->sw || isr_stats->hw) {
2381 pos += scnprintf(buf + pos, bufsz - pos,
2382 "\tLast Restarting Code: 0x%X\n",
2383 isr_stats->err_code);
2384 }
2385 #ifdef CONFIG_IWLWIFI_DEBUG
2386 pos += scnprintf(buf + pos, bufsz - pos, "Frame transmitted:\t\t %u\n",
2387 isr_stats->sch);
2388 pos += scnprintf(buf + pos, bufsz - pos, "Alive interrupt:\t\t %u\n",
2389 isr_stats->alive);
2390 #endif
2391 pos += scnprintf(buf + pos, bufsz - pos,
2392 "HW RF KILL switch toggled:\t %u\n", isr_stats->rfkill);
2393
2394 pos += scnprintf(buf + pos, bufsz - pos, "CT KILL:\t\t\t %u\n",
2395 isr_stats->ctkill);
2396
2397 pos += scnprintf(buf + pos, bufsz - pos, "Wakeup Interrupt:\t\t %u\n",
2398 isr_stats->wakeup);
2399
2400 pos += scnprintf(buf + pos, bufsz - pos,
2401 "Rx command responses:\t\t %u\n", isr_stats->rx);
2402
2403 pos += scnprintf(buf + pos, bufsz - pos, "Tx/FH interrupt:\t\t %u\n",
2404 isr_stats->tx);
2405
2406 pos += scnprintf(buf + pos, bufsz - pos, "Unexpected INTA:\t\t %u\n",
2407 isr_stats->unhandled);
2408
2409 ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
2410 kfree(buf);
2411 return ret;
2412 }
2413
2414 static ssize_t iwl_dbgfs_interrupt_write(struct file *file,
2415 const char __user *user_buf,
2416 size_t count, loff_t *ppos)
2417 {
2418 struct iwl_trans *trans = file->private_data;
2419 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2420 struct isr_statistics *isr_stats = &trans_pcie->isr_stats;
2421 u32 reset_flag;
2422 int ret;
2423
2424 ret = kstrtou32_from_user(user_buf, count, 16, &reset_flag);
2425 if (ret)
2426 return ret;
2427 if (reset_flag == 0)
2428 memset(isr_stats, 0, sizeof(*isr_stats));
2429
2430 return count;
2431 }
2432
2433 static ssize_t iwl_dbgfs_csr_write(struct file *file,
2434 const char __user *user_buf,
2435 size_t count, loff_t *ppos)
2436 {
2437 struct iwl_trans *trans = file->private_data;
2438
2439 iwl_pcie_dump_csr(trans);
2440
2441 return count;
2442 }
2443
2444 static ssize_t iwl_dbgfs_fh_reg_read(struct file *file,
2445 char __user *user_buf,
2446 size_t count, loff_t *ppos)
2447 {
2448 struct iwl_trans *trans = file->private_data;
2449 char *buf = NULL;
2450 ssize_t ret;
2451
2452 ret = iwl_dump_fh(trans, &buf);
2453 if (ret < 0)
2454 return ret;
2455 if (!buf)
2456 return -EINVAL;
2457 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
2458 kfree(buf);
2459 return ret;
2460 }
2461
2462 static ssize_t iwl_dbgfs_rfkill_read(struct file *file,
2463 char __user *user_buf,
2464 size_t count, loff_t *ppos)
2465 {
2466 struct iwl_trans *trans = file->private_data;
2467 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2468 char buf[100];
2469 int pos;
2470
2471 pos = scnprintf(buf, sizeof(buf), "debug: %d\nhw: %d\n",
2472 trans_pcie->debug_rfkill,
2473 !(iwl_read32(trans, CSR_GP_CNTRL) &
2474 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW));
2475
2476 return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
2477 }
2478
2479 static ssize_t iwl_dbgfs_rfkill_write(struct file *file,
2480 const char __user *user_buf,
2481 size_t count, loff_t *ppos)
2482 {
2483 struct iwl_trans *trans = file->private_data;
2484 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2485 bool old = trans_pcie->debug_rfkill;
2486 int ret;
2487
2488 ret = kstrtobool_from_user(user_buf, count, &trans_pcie->debug_rfkill);
2489 if (ret)
2490 return ret;
2491 if (old == trans_pcie->debug_rfkill)
2492 return count;
2493 IWL_WARN(trans, "changing debug rfkill %d->%d\n",
2494 old, trans_pcie->debug_rfkill);
2495 iwl_pcie_handle_rfkill_irq(trans);
2496
2497 return count;
2498 }
2499
2500 DEBUGFS_READ_WRITE_FILE_OPS(interrupt);
2501 DEBUGFS_READ_FILE_OPS(fh_reg);
2502 DEBUGFS_READ_FILE_OPS(rx_queue);
2503 DEBUGFS_READ_FILE_OPS(tx_queue);
2504 DEBUGFS_WRITE_FILE_OPS(csr);
2505 DEBUGFS_READ_WRITE_FILE_OPS(rfkill);
2506
2507 /* Create the debugfs files and directories */
2508 int iwl_trans_pcie_dbgfs_register(struct iwl_trans *trans)
2509 {
2510 struct dentry *dir = trans->dbgfs_dir;
2511
2512 DEBUGFS_ADD_FILE(rx_queue, dir, S_IRUSR);
2513 DEBUGFS_ADD_FILE(tx_queue, dir, S_IRUSR);
2514 DEBUGFS_ADD_FILE(interrupt, dir, S_IWUSR | S_IRUSR);
2515 DEBUGFS_ADD_FILE(csr, dir, S_IWUSR);
2516 DEBUGFS_ADD_FILE(fh_reg, dir, S_IRUSR);
2517 DEBUGFS_ADD_FILE(rfkill, dir, S_IWUSR | S_IRUSR);
2518 return 0;
2519
2520 err:
2521 IWL_ERR(trans, "failed to create the trans debugfs entry\n");
2522 return -ENOMEM;
2523 }
2524 #endif /*CONFIG_IWLWIFI_DEBUGFS */
2525
2526 static u32 iwl_trans_pcie_get_cmdlen(struct iwl_trans *trans, void *tfd)
2527 {
2528 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2529 u32 cmdlen = 0;
2530 int i;
2531
2532 for (i = 0; i < trans_pcie->max_tbs; i++)
2533 cmdlen += iwl_pcie_tfd_tb_get_len(trans, tfd, i);
2534
2535 return cmdlen;
2536 }
2537
2538 static u32 iwl_trans_pcie_dump_rbs(struct iwl_trans *trans,
2539 struct iwl_fw_error_dump_data **data,
2540 int allocated_rb_nums)
2541 {
2542 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2543 int max_len = PAGE_SIZE << trans_pcie->rx_page_order;
2544 /* Dump RBs is supported only for pre-9000 devices (1 queue) */
2545 struct iwl_rxq *rxq = &trans_pcie->rxq[0];
2546 u32 i, r, j, rb_len = 0;
2547
2548 spin_lock(&rxq->lock);
2549
2550 r = le16_to_cpu(ACCESS_ONCE(rxq->rb_stts->closed_rb_num)) & 0x0FFF;
2551
2552 for (i = rxq->read, j = 0;
2553 i != r && j < allocated_rb_nums;
2554 i = (i + 1) & RX_QUEUE_MASK, j++) {
2555 struct iwl_rx_mem_buffer *rxb = rxq->queue[i];
2556 struct iwl_fw_error_dump_rb *rb;
2557
2558 dma_unmap_page(trans->dev, rxb->page_dma, max_len,
2559 DMA_FROM_DEVICE);
2560
2561 rb_len += sizeof(**data) + sizeof(*rb) + max_len;
2562
2563 (*data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_RB);
2564 (*data)->len = cpu_to_le32(sizeof(*rb) + max_len);
2565 rb = (void *)(*data)->data;
2566 rb->index = cpu_to_le32(i);
2567 memcpy(rb->data, page_address(rxb->page), max_len);
2568 /* remap the page for the free benefit */
2569 rxb->page_dma = dma_map_page(trans->dev, rxb->page, 0,
2570 max_len,
2571 DMA_FROM_DEVICE);
2572
2573 *data = iwl_fw_error_next_data(*data);
2574 }
2575
2576 spin_unlock(&rxq->lock);
2577
2578 return rb_len;
2579 }
2580 #define IWL_CSR_TO_DUMP (0x250)
2581
2582 static u32 iwl_trans_pcie_dump_csr(struct iwl_trans *trans,
2583 struct iwl_fw_error_dump_data **data)
2584 {
2585 u32 csr_len = sizeof(**data) + IWL_CSR_TO_DUMP;
2586 __le32 *val;
2587 int i;
2588
2589 (*data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_CSR);
2590 (*data)->len = cpu_to_le32(IWL_CSR_TO_DUMP);
2591 val = (void *)(*data)->data;
2592
2593 for (i = 0; i < IWL_CSR_TO_DUMP; i += 4)
2594 *val++ = cpu_to_le32(iwl_trans_pcie_read32(trans, i));
2595
2596 *data = iwl_fw_error_next_data(*data);
2597
2598 return csr_len;
2599 }
2600
2601 static u32 iwl_trans_pcie_fh_regs_dump(struct iwl_trans *trans,
2602 struct iwl_fw_error_dump_data **data)
2603 {
2604 u32 fh_regs_len = FH_MEM_UPPER_BOUND - FH_MEM_LOWER_BOUND;
2605 unsigned long flags;
2606 __le32 *val;
2607 int i;
2608
2609 if (!iwl_trans_grab_nic_access(trans, &flags))
2610 return 0;
2611
2612 (*data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_FH_REGS);
2613 (*data)->len = cpu_to_le32(fh_regs_len);
2614 val = (void *)(*data)->data;
2615
2616 if (!trans->cfg->gen2)
2617 for (i = FH_MEM_LOWER_BOUND; i < FH_MEM_UPPER_BOUND;
2618 i += sizeof(u32))
2619 *val++ = cpu_to_le32(iwl_trans_pcie_read32(trans, i));
2620 else
2621 for (i = FH_MEM_LOWER_BOUND_GEN2; i < FH_MEM_UPPER_BOUND_GEN2;
2622 i += sizeof(u32))
2623 *val++ = cpu_to_le32(iwl_trans_pcie_read_prph(trans,
2624 i));
2625
2626 iwl_trans_release_nic_access(trans, &flags);
2627
2628 *data = iwl_fw_error_next_data(*data);
2629
2630 return sizeof(**data) + fh_regs_len;
2631 }
2632
2633 static u32
2634 iwl_trans_pci_dump_marbh_monitor(struct iwl_trans *trans,
2635 struct iwl_fw_error_dump_fw_mon *fw_mon_data,
2636 u32 monitor_len)
2637 {
2638 u32 buf_size_in_dwords = (monitor_len >> 2);
2639 u32 *buffer = (u32 *)fw_mon_data->data;
2640 unsigned long flags;
2641 u32 i;
2642
2643 if (!iwl_trans_grab_nic_access(trans, &flags))
2644 return 0;
2645
2646 iwl_write_prph_no_grab(trans, MON_DMARB_RD_CTL_ADDR, 0x1);
2647 for (i = 0; i < buf_size_in_dwords; i++)
2648 buffer[i] = iwl_read_prph_no_grab(trans,
2649 MON_DMARB_RD_DATA_ADDR);
2650 iwl_write_prph_no_grab(trans, MON_DMARB_RD_CTL_ADDR, 0x0);
2651
2652 iwl_trans_release_nic_access(trans, &flags);
2653
2654 return monitor_len;
2655 }
2656
2657 static u32
2658 iwl_trans_pcie_dump_monitor(struct iwl_trans *trans,
2659 struct iwl_fw_error_dump_data **data,
2660 u32 monitor_len)
2661 {
2662 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2663 u32 len = 0;
2664
2665 if ((trans_pcie->fw_mon_page &&
2666 trans->cfg->device_family == IWL_DEVICE_FAMILY_7000) ||
2667 trans->dbg_dest_tlv) {
2668 struct iwl_fw_error_dump_fw_mon *fw_mon_data;
2669 u32 base, write_ptr, wrap_cnt;
2670
2671 /* If there was a dest TLV - use the values from there */
2672 if (trans->dbg_dest_tlv) {
2673 write_ptr =
2674 le32_to_cpu(trans->dbg_dest_tlv->write_ptr_reg);
2675 wrap_cnt = le32_to_cpu(trans->dbg_dest_tlv->wrap_count);
2676 base = le32_to_cpu(trans->dbg_dest_tlv->base_reg);
2677 } else {
2678 base = MON_BUFF_BASE_ADDR;
2679 write_ptr = MON_BUFF_WRPTR;
2680 wrap_cnt = MON_BUFF_CYCLE_CNT;
2681 }
2682
2683 (*data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_FW_MONITOR);
2684 fw_mon_data = (void *)(*data)->data;
2685 fw_mon_data->fw_mon_wr_ptr =
2686 cpu_to_le32(iwl_read_prph(trans, write_ptr));
2687 fw_mon_data->fw_mon_cycle_cnt =
2688 cpu_to_le32(iwl_read_prph(trans, wrap_cnt));
2689 fw_mon_data->fw_mon_base_ptr =
2690 cpu_to_le32(iwl_read_prph(trans, base));
2691
2692 len += sizeof(**data) + sizeof(*fw_mon_data);
2693 if (trans_pcie->fw_mon_page) {
2694 /*
2695 * The firmware is now asserted, it won't write anything
2696 * to the buffer. CPU can take ownership to fetch the
2697 * data. The buffer will be handed back to the device
2698 * before the firmware will be restarted.
2699 */
2700 dma_sync_single_for_cpu(trans->dev,
2701 trans_pcie->fw_mon_phys,
2702 trans_pcie->fw_mon_size,
2703 DMA_FROM_DEVICE);
2704 memcpy(fw_mon_data->data,
2705 page_address(trans_pcie->fw_mon_page),
2706 trans_pcie->fw_mon_size);
2707
2708 monitor_len = trans_pcie->fw_mon_size;
2709 } else if (trans->dbg_dest_tlv->monitor_mode == SMEM_MODE) {
2710 /*
2711 * Update pointers to reflect actual values after
2712 * shifting
2713 */
2714 base = iwl_read_prph(trans, base) <<
2715 trans->dbg_dest_tlv->base_shift;
2716 iwl_trans_read_mem(trans, base, fw_mon_data->data,
2717 monitor_len / sizeof(u32));
2718 } else if (trans->dbg_dest_tlv->monitor_mode == MARBH_MODE) {
2719 monitor_len =
2720 iwl_trans_pci_dump_marbh_monitor(trans,
2721 fw_mon_data,
2722 monitor_len);
2723 } else {
2724 /* Didn't match anything - output no monitor data */
2725 monitor_len = 0;
2726 }
2727
2728 len += monitor_len;
2729 (*data)->len = cpu_to_le32(monitor_len + sizeof(*fw_mon_data));
2730 }
2731
2732 return len;
2733 }
2734
2735 static struct iwl_trans_dump_data
2736 *iwl_trans_pcie_dump_data(struct iwl_trans *trans,
2737 const struct iwl_fw_dbg_trigger_tlv *trigger)
2738 {
2739 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2740 struct iwl_fw_error_dump_data *data;
2741 struct iwl_txq *cmdq = trans_pcie->txq[trans_pcie->cmd_queue];
2742 struct iwl_fw_error_dump_txcmd *txcmd;
2743 struct iwl_trans_dump_data *dump_data;
2744 u32 len, num_rbs;
2745 u32 monitor_len;
2746 int i, ptr;
2747 bool dump_rbs = test_bit(STATUS_FW_ERROR, &trans->status) &&
2748 !trans->cfg->mq_rx_supported;
2749
2750 /* transport dump header */
2751 len = sizeof(*dump_data);
2752
2753 /* host commands */
2754 len += sizeof(*data) +
2755 cmdq->n_window * (sizeof(*txcmd) + TFD_MAX_PAYLOAD_SIZE);
2756
2757 /* FW monitor */
2758 if (trans_pcie->fw_mon_page) {
2759 len += sizeof(*data) + sizeof(struct iwl_fw_error_dump_fw_mon) +
2760 trans_pcie->fw_mon_size;
2761 monitor_len = trans_pcie->fw_mon_size;
2762 } else if (trans->dbg_dest_tlv) {
2763 u32 base, end;
2764
2765 base = le32_to_cpu(trans->dbg_dest_tlv->base_reg);
2766 end = le32_to_cpu(trans->dbg_dest_tlv->end_reg);
2767
2768 base = iwl_read_prph(trans, base) <<
2769 trans->dbg_dest_tlv->base_shift;
2770 end = iwl_read_prph(trans, end) <<
2771 trans->dbg_dest_tlv->end_shift;
2772
2773 /* Make "end" point to the actual end */
2774 if (trans->cfg->device_family >= IWL_DEVICE_FAMILY_8000 ||
2775 trans->dbg_dest_tlv->monitor_mode == MARBH_MODE)
2776 end += (1 << trans->dbg_dest_tlv->end_shift);
2777 monitor_len = end - base;
2778 len += sizeof(*data) + sizeof(struct iwl_fw_error_dump_fw_mon) +
2779 monitor_len;
2780 } else {
2781 monitor_len = 0;
2782 }
2783
2784 if (trigger && (trigger->mode & IWL_FW_DBG_TRIGGER_MONITOR_ONLY)) {
2785 dump_data = vzalloc(len);
2786 if (!dump_data)
2787 return NULL;
2788
2789 data = (void *)dump_data->data;
2790 len = iwl_trans_pcie_dump_monitor(trans, &data, monitor_len);
2791 dump_data->len = len;
2792
2793 return dump_data;
2794 }
2795
2796 /* CSR registers */
2797 len += sizeof(*data) + IWL_CSR_TO_DUMP;
2798
2799 /* FH registers */
2800 if (trans->cfg->gen2)
2801 len += sizeof(*data) +
2802 (FH_MEM_UPPER_BOUND_GEN2 - FH_MEM_LOWER_BOUND_GEN2);
2803 else
2804 len += sizeof(*data) +
2805 (FH_MEM_UPPER_BOUND - FH_MEM_LOWER_BOUND);
2806
2807 if (dump_rbs) {
2808 /* Dump RBs is supported only for pre-9000 devices (1 queue) */
2809 struct iwl_rxq *rxq = &trans_pcie->rxq[0];
2810 /* RBs */
2811 num_rbs = le16_to_cpu(ACCESS_ONCE(rxq->rb_stts->closed_rb_num))
2812 & 0x0FFF;
2813 num_rbs = (num_rbs - rxq->read) & RX_QUEUE_MASK;
2814 len += num_rbs * (sizeof(*data) +
2815 sizeof(struct iwl_fw_error_dump_rb) +
2816 (PAGE_SIZE << trans_pcie->rx_page_order));
2817 }
2818
2819 /* Paged memory for gen2 HW */
2820 if (trans->cfg->gen2)
2821 for (i = 0; i < trans_pcie->init_dram.paging_cnt; i++)
2822 len += sizeof(*data) +
2823 sizeof(struct iwl_fw_error_dump_paging) +
2824 trans_pcie->init_dram.paging[i].size;
2825
2826 dump_data = vzalloc(len);
2827 if (!dump_data)
2828 return NULL;
2829
2830 len = 0;
2831 data = (void *)dump_data->data;
2832 data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_TXCMD);
2833 txcmd = (void *)data->data;
2834 spin_lock_bh(&cmdq->lock);
2835 ptr = cmdq->write_ptr;
2836 for (i = 0; i < cmdq->n_window; i++) {
2837 u8 idx = get_cmd_index(cmdq, ptr);
2838 u32 caplen, cmdlen;
2839
2840 cmdlen = iwl_trans_pcie_get_cmdlen(trans, cmdq->tfds +
2841 trans_pcie->tfd_size * ptr);
2842 caplen = min_t(u32, TFD_MAX_PAYLOAD_SIZE, cmdlen);
2843
2844 if (cmdlen) {
2845 len += sizeof(*txcmd) + caplen;
2846 txcmd->cmdlen = cpu_to_le32(cmdlen);
2847 txcmd->caplen = cpu_to_le32(caplen);
2848 memcpy(txcmd->data, cmdq->entries[idx].cmd, caplen);
2849 txcmd = (void *)((u8 *)txcmd->data + caplen);
2850 }
2851
2852 ptr = iwl_queue_dec_wrap(ptr);
2853 }
2854 spin_unlock_bh(&cmdq->lock);
2855
2856 data->len = cpu_to_le32(len);
2857 len += sizeof(*data);
2858 data = iwl_fw_error_next_data(data);
2859
2860 len += iwl_trans_pcie_dump_csr(trans, &data);
2861 len += iwl_trans_pcie_fh_regs_dump(trans, &data);
2862 if (dump_rbs)
2863 len += iwl_trans_pcie_dump_rbs(trans, &data, num_rbs);
2864
2865 /* Paged memory for gen2 HW */
2866 if (trans->cfg->gen2) {
2867 for (i = 0; i < trans_pcie->init_dram.paging_cnt; i++) {
2868 struct iwl_fw_error_dump_paging *paging;
2869 dma_addr_t addr =
2870 trans_pcie->init_dram.paging[i].physical;
2871 u32 page_len = trans_pcie->init_dram.paging[i].size;
2872
2873 data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_PAGING);
2874 data->len = cpu_to_le32(sizeof(*paging) + page_len);
2875 paging = (void *)data->data;
2876 paging->index = cpu_to_le32(i);
2877 dma_sync_single_for_cpu(trans->dev, addr, page_len,
2878 DMA_BIDIRECTIONAL);
2879 memcpy(paging->data,
2880 trans_pcie->init_dram.paging[i].block, page_len);
2881 data = iwl_fw_error_next_data(data);
2882
2883 len += sizeof(*data) + sizeof(*paging) + page_len;
2884 }
2885 }
2886
2887 len += iwl_trans_pcie_dump_monitor(trans, &data, monitor_len);
2888
2889 dump_data->len = len;
2890
2891 return dump_data;
2892 }
2893
2894 #ifdef CONFIG_PM_SLEEP
2895 static int iwl_trans_pcie_suspend(struct iwl_trans *trans)
2896 {
2897 if (trans->runtime_pm_mode == IWL_PLAT_PM_MODE_D0I3 &&
2898 (trans->system_pm_mode == IWL_PLAT_PM_MODE_D0I3))
2899 return iwl_pci_fw_enter_d0i3(trans);
2900
2901 return 0;
2902 }
2903
2904 static void iwl_trans_pcie_resume(struct iwl_trans *trans)
2905 {
2906 if (trans->runtime_pm_mode == IWL_PLAT_PM_MODE_D0I3 &&
2907 (trans->system_pm_mode == IWL_PLAT_PM_MODE_D0I3))
2908 iwl_pci_fw_exit_d0i3(trans);
2909 }
2910 #endif /* CONFIG_PM_SLEEP */
2911
2912 #define IWL_TRANS_COMMON_OPS \
2913 .op_mode_leave = iwl_trans_pcie_op_mode_leave, \
2914 .write8 = iwl_trans_pcie_write8, \
2915 .write32 = iwl_trans_pcie_write32, \
2916 .read32 = iwl_trans_pcie_read32, \
2917 .read_prph = iwl_trans_pcie_read_prph, \
2918 .write_prph = iwl_trans_pcie_write_prph, \
2919 .read_mem = iwl_trans_pcie_read_mem, \
2920 .write_mem = iwl_trans_pcie_write_mem, \
2921 .configure = iwl_trans_pcie_configure, \
2922 .set_pmi = iwl_trans_pcie_set_pmi, \
2923 .grab_nic_access = iwl_trans_pcie_grab_nic_access, \
2924 .release_nic_access = iwl_trans_pcie_release_nic_access, \
2925 .set_bits_mask = iwl_trans_pcie_set_bits_mask, \
2926 .ref = iwl_trans_pcie_ref, \
2927 .unref = iwl_trans_pcie_unref, \
2928 .dump_data = iwl_trans_pcie_dump_data, \
2929 .d3_suspend = iwl_trans_pcie_d3_suspend, \
2930 .d3_resume = iwl_trans_pcie_d3_resume
2931
2932 #ifdef CONFIG_PM_SLEEP
2933 #define IWL_TRANS_PM_OPS \
2934 .suspend = iwl_trans_pcie_suspend, \
2935 .resume = iwl_trans_pcie_resume,
2936 #else
2937 #define IWL_TRANS_PM_OPS
2938 #endif /* CONFIG_PM_SLEEP */
2939
2940 static const struct iwl_trans_ops trans_ops_pcie = {
2941 IWL_TRANS_COMMON_OPS,
2942 IWL_TRANS_PM_OPS
2943 .start_hw = iwl_trans_pcie_start_hw,
2944 .fw_alive = iwl_trans_pcie_fw_alive,
2945 .start_fw = iwl_trans_pcie_start_fw,
2946 .stop_device = iwl_trans_pcie_stop_device,
2947
2948 .send_cmd = iwl_trans_pcie_send_hcmd,
2949
2950 .tx = iwl_trans_pcie_tx,
2951 .reclaim = iwl_trans_pcie_reclaim,
2952
2953 .txq_disable = iwl_trans_pcie_txq_disable,
2954 .txq_enable = iwl_trans_pcie_txq_enable,
2955
2956 .txq_set_shared_mode = iwl_trans_pcie_txq_set_shared_mode,
2957
2958 .wait_tx_queues_empty = iwl_trans_pcie_wait_txqs_empty,
2959
2960 .freeze_txq_timer = iwl_trans_pcie_freeze_txq_timer,
2961 .block_txq_ptrs = iwl_trans_pcie_block_txq_ptrs,
2962 };
2963
2964 static const struct iwl_trans_ops trans_ops_pcie_gen2 = {
2965 IWL_TRANS_COMMON_OPS,
2966 IWL_TRANS_PM_OPS
2967 .start_hw = iwl_trans_pcie_start_hw,
2968 .fw_alive = iwl_trans_pcie_gen2_fw_alive,
2969 .start_fw = iwl_trans_pcie_gen2_start_fw,
2970 .stop_device = iwl_trans_pcie_gen2_stop_device,
2971
2972 .send_cmd = iwl_trans_pcie_gen2_send_hcmd,
2973
2974 .tx = iwl_trans_pcie_gen2_tx,
2975 .reclaim = iwl_trans_pcie_reclaim,
2976
2977 .txq_alloc = iwl_trans_pcie_dyn_txq_alloc,
2978 .txq_free = iwl_trans_pcie_dyn_txq_free,
2979 .wait_txq_empty = iwl_trans_pcie_wait_txq_empty,
2980 };
2981
2982 struct iwl_trans *iwl_trans_pcie_alloc(struct pci_dev *pdev,
2983 const struct pci_device_id *ent,
2984 const struct iwl_cfg *cfg)
2985 {
2986 struct iwl_trans_pcie *trans_pcie;
2987 struct iwl_trans *trans;
2988 int ret, addr_size;
2989
2990 ret = pcim_enable_device(pdev);
2991 if (ret)
2992 return ERR_PTR(ret);
2993
2994 if (cfg->gen2)
2995 trans = iwl_trans_alloc(sizeof(struct iwl_trans_pcie),
2996 &pdev->dev, cfg, &trans_ops_pcie_gen2);
2997 else
2998 trans = iwl_trans_alloc(sizeof(struct iwl_trans_pcie),
2999 &pdev->dev, cfg, &trans_ops_pcie);
3000 if (!trans)
3001 return ERR_PTR(-ENOMEM);
3002
3003 trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
3004
3005 trans_pcie->trans = trans;
3006 trans_pcie->opmode_down = true;
3007 spin_lock_init(&trans_pcie->irq_lock);
3008 spin_lock_init(&trans_pcie->reg_lock);
3009 mutex_init(&trans_pcie->mutex);
3010 init_waitqueue_head(&trans_pcie->ucode_write_waitq);
3011 trans_pcie->tso_hdr_page = alloc_percpu(struct iwl_tso_hdr_page);
3012 if (!trans_pcie->tso_hdr_page) {
3013 ret = -ENOMEM;
3014 goto out_no_pci;
3015 }
3016
3017
3018 if (!cfg->base_params->pcie_l1_allowed) {
3019 /*
3020 * W/A - seems to solve weird behavior. We need to remove this
3021 * if we don't want to stay in L1 all the time. This wastes a
3022 * lot of power.
3023 */
3024 pci_disable_link_state(pdev, PCIE_LINK_STATE_L0S |
3025 PCIE_LINK_STATE_L1 |
3026 PCIE_LINK_STATE_CLKPM);
3027 }
3028
3029 if (cfg->use_tfh) {
3030 addr_size = 64;
3031 trans_pcie->max_tbs = IWL_TFH_NUM_TBS;
3032 trans_pcie->tfd_size = sizeof(struct iwl_tfh_tfd);
3033 } else {
3034 addr_size = 36;
3035 trans_pcie->max_tbs = IWL_NUM_OF_TBS;
3036 trans_pcie->tfd_size = sizeof(struct iwl_tfd);
3037 }
3038 trans->max_skb_frags = IWL_PCIE_MAX_FRAGS(trans_pcie);
3039
3040 pci_set_master(pdev);
3041
3042 ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(addr_size));
3043 if (!ret)
3044 ret = pci_set_consistent_dma_mask(pdev,
3045 DMA_BIT_MASK(addr_size));
3046 if (ret) {
3047 ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3048 if (!ret)
3049 ret = pci_set_consistent_dma_mask(pdev,
3050 DMA_BIT_MASK(32));
3051 /* both attempts failed: */
3052 if (ret) {
3053 dev_err(&pdev->dev, "No suitable DMA available\n");
3054 goto out_no_pci;
3055 }
3056 }
3057
3058 ret = pcim_iomap_regions_request_all(pdev, BIT(0), DRV_NAME);
3059 if (ret) {
3060 dev_err(&pdev->dev, "pcim_iomap_regions_request_all failed\n");
3061 goto out_no_pci;
3062 }
3063
3064 trans_pcie->hw_base = pcim_iomap_table(pdev)[0];
3065 if (!trans_pcie->hw_base) {
3066 dev_err(&pdev->dev, "pcim_iomap_table failed\n");
3067 ret = -ENODEV;
3068 goto out_no_pci;
3069 }
3070
3071 /* We disable the RETRY_TIMEOUT register (0x41) to keep
3072 * PCI Tx retries from interfering with C3 CPU state */
3073 pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
3074
3075 trans_pcie->pci_dev = pdev;
3076 iwl_disable_interrupts(trans);
3077
3078 trans->hw_rev = iwl_read32(trans, CSR_HW_REV);
3079 /*
3080 * In the 8000 HW family the format of the 4 bytes of CSR_HW_REV have
3081 * changed, and now the revision step also includes bit 0-1 (no more
3082 * "dash" value). To keep hw_rev backwards compatible - we'll store it
3083 * in the old format.
3084 */
3085 if (trans->cfg->device_family >= IWL_DEVICE_FAMILY_8000) {
3086 unsigned long flags;
3087
3088 trans->hw_rev = (trans->hw_rev & 0xfff0) |
3089 (CSR_HW_REV_STEP(trans->hw_rev << 2) << 2);
3090
3091 ret = iwl_pcie_prepare_card_hw(trans);
3092 if (ret) {
3093 IWL_WARN(trans, "Exit HW not ready\n");
3094 goto out_no_pci;
3095 }
3096
3097 /*
3098 * in-order to recognize C step driver should read chip version
3099 * id located at the AUX bus MISC address space.
3100 */
3101 iwl_set_bit(trans, CSR_GP_CNTRL,
3102 CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
3103 udelay(2);
3104
3105 ret = iwl_poll_bit(trans, CSR_GP_CNTRL,
3106 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
3107 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
3108 25000);
3109 if (ret < 0) {
3110 IWL_DEBUG_INFO(trans, "Failed to wake up the nic\n");
3111 goto out_no_pci;
3112 }
3113
3114 if (iwl_trans_grab_nic_access(trans, &flags)) {
3115 u32 hw_step;
3116
3117 hw_step = iwl_read_prph_no_grab(trans, WFPM_CTRL_REG);
3118 hw_step |= ENABLE_WFPM;
3119 iwl_write_prph_no_grab(trans, WFPM_CTRL_REG, hw_step);
3120 hw_step = iwl_read_prph_no_grab(trans, AUX_MISC_REG);
3121 hw_step = (hw_step >> HW_STEP_LOCATION_BITS) & 0xF;
3122 if (hw_step == 0x3)
3123 trans->hw_rev = (trans->hw_rev & 0xFFFFFFF3) |
3124 (SILICON_C_STEP << 2);
3125 iwl_trans_release_nic_access(trans, &flags);
3126 }
3127 }
3128
3129 /*
3130 * 9000-series integrated A-step has a problem with suspend/resume
3131 * and sometimes even causes the whole platform to get stuck. This
3132 * workaround makes the hardware not go into the problematic state.
3133 */
3134 if (trans->cfg->integrated &&
3135 trans->cfg->device_family == IWL_DEVICE_FAMILY_9000 &&
3136 CSR_HW_REV_STEP(trans->hw_rev) == SILICON_A_STEP)
3137 iwl_set_bit(trans, CSR_HOST_CHICKEN,
3138 CSR_HOST_CHICKEN_PM_IDLE_SRC_DIS_SB_PME);
3139
3140 trans->hw_rf_id = iwl_read32(trans, CSR_HW_RF_ID);
3141
3142 iwl_pcie_set_interrupt_capa(pdev, trans);
3143 trans->hw_id = (pdev->device << 16) + pdev->subsystem_device;
3144 snprintf(trans->hw_id_str, sizeof(trans->hw_id_str),
3145 "PCI ID: 0x%04X:0x%04X", pdev->device, pdev->subsystem_device);
3146
3147 /* Initialize the wait queue for commands */
3148 init_waitqueue_head(&trans_pcie->wait_command_queue);
3149
3150 init_waitqueue_head(&trans_pcie->d0i3_waitq);
3151
3152 if (trans_pcie->msix_enabled) {
3153 ret = iwl_pcie_init_msix_handler(pdev, trans_pcie);
3154 if (ret)
3155 goto out_no_pci;
3156 } else {
3157 ret = iwl_pcie_alloc_ict(trans);
3158 if (ret)
3159 goto out_no_pci;
3160
3161 ret = devm_request_threaded_irq(&pdev->dev, pdev->irq,
3162 iwl_pcie_isr,
3163 iwl_pcie_irq_handler,
3164 IRQF_SHARED, DRV_NAME, trans);
3165 if (ret) {
3166 IWL_ERR(trans, "Error allocating IRQ %d\n", pdev->irq);
3167 goto out_free_ict;
3168 }
3169 trans_pcie->inta_mask = CSR_INI_SET_MASK;
3170 }
3171
3172 #ifdef CONFIG_IWLWIFI_PCIE_RTPM
3173 trans->runtime_pm_mode = IWL_PLAT_PM_MODE_D0I3;
3174 #else
3175 trans->runtime_pm_mode = IWL_PLAT_PM_MODE_DISABLED;
3176 #endif /* CONFIG_IWLWIFI_PCIE_RTPM */
3177
3178 return trans;
3179
3180 out_free_ict:
3181 iwl_pcie_free_ict(trans);
3182 out_no_pci:
3183 free_percpu(trans_pcie->tso_hdr_page);
3184 iwl_trans_free(trans);
3185 return ERR_PTR(ret);
3186 }
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