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1// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
2/*
3 * Copyright (C) 2007-2015, 2018-2023 Intel Corporation
4 * Copyright (C) 2013-2015 Intel Mobile Communications GmbH
5 * Copyright (C) 2016-2017 Intel Deutschland GmbH
6 */
7#include <linux/pci.h>
8#include <linux/interrupt.h>
9#include <linux/debugfs.h>
10#include <linux/sched.h>
11#include <linux/bitops.h>
12#include <linux/gfp.h>
13#include <linux/vmalloc.h>
14#include <linux/module.h>
15#include <linux/wait.h>
16#include <linux/seq_file.h>
17
18#include "iwl-drv.h"
19#include "iwl-trans.h"
20#include "iwl-csr.h"
21#include "iwl-prph.h"
22#include "iwl-scd.h"
23#include "iwl-agn-hw.h"
24#include "fw/error-dump.h"
25#include "fw/dbg.h"
26#include "fw/api/tx.h"
27#include "mei/iwl-mei.h"
28#include "internal.h"
29#include "iwl-fh.h"
30#include "iwl-context-info-gen3.h"
31
32/* extended range in FW SRAM */
33#define IWL_FW_MEM_EXTENDED_START 0x40000
34#define IWL_FW_MEM_EXTENDED_END 0x57FFF
35
36void iwl_trans_pcie_dump_regs(struct iwl_trans *trans)
37{
38#define PCI_DUMP_SIZE 352
39#define PCI_MEM_DUMP_SIZE 64
40#define PCI_PARENT_DUMP_SIZE 524
41#define PREFIX_LEN 32
42 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
43 struct pci_dev *pdev = trans_pcie->pci_dev;
44 u32 i, pos, alloc_size, *ptr, *buf;
45 char *prefix;
46
47 if (trans_pcie->pcie_dbg_dumped_once)
48 return;
49
50 /* Should be a multiple of 4 */
51 BUILD_BUG_ON(PCI_DUMP_SIZE > 4096 || PCI_DUMP_SIZE & 0x3);
52 BUILD_BUG_ON(PCI_MEM_DUMP_SIZE > 4096 || PCI_MEM_DUMP_SIZE & 0x3);
53 BUILD_BUG_ON(PCI_PARENT_DUMP_SIZE > 4096 || PCI_PARENT_DUMP_SIZE & 0x3);
54
55 /* Alloc a max size buffer */
56 alloc_size = PCI_ERR_ROOT_ERR_SRC + 4 + PREFIX_LEN;
57 alloc_size = max_t(u32, alloc_size, PCI_DUMP_SIZE + PREFIX_LEN);
58 alloc_size = max_t(u32, alloc_size, PCI_MEM_DUMP_SIZE + PREFIX_LEN);
59 alloc_size = max_t(u32, alloc_size, PCI_PARENT_DUMP_SIZE + PREFIX_LEN);
60
61 buf = kmalloc(alloc_size, GFP_ATOMIC);
62 if (!buf)
63 return;
64 prefix = (char *)buf + alloc_size - PREFIX_LEN;
65
66 IWL_ERR(trans, "iwlwifi transaction failed, dumping registers\n");
67
68 /* Print wifi device registers */
69 sprintf(prefix, "iwlwifi %s: ", pci_name(pdev));
70 IWL_ERR(trans, "iwlwifi device config registers:\n");
71 for (i = 0, ptr = buf; i < PCI_DUMP_SIZE; i += 4, ptr++)
72 if (pci_read_config_dword(pdev, i, ptr))
73 goto err_read;
74 print_hex_dump(KERN_ERR, prefix, DUMP_PREFIX_OFFSET, 32, 4, buf, i, 0);
75
76 IWL_ERR(trans, "iwlwifi device memory mapped registers:\n");
77 for (i = 0, ptr = buf; i < PCI_MEM_DUMP_SIZE; i += 4, ptr++)
78 *ptr = iwl_read32(trans, i);
79 print_hex_dump(KERN_ERR, prefix, DUMP_PREFIX_OFFSET, 32, 4, buf, i, 0);
80
81 pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_ERR);
82 if (pos) {
83 IWL_ERR(trans, "iwlwifi device AER capability structure:\n");
84 for (i = 0, ptr = buf; i < PCI_ERR_ROOT_COMMAND; i += 4, ptr++)
85 if (pci_read_config_dword(pdev, pos + i, ptr))
86 goto err_read;
87 print_hex_dump(KERN_ERR, prefix, DUMP_PREFIX_OFFSET,
88 32, 4, buf, i, 0);
89 }
90
91 /* Print parent device registers next */
92 if (!pdev->bus->self)
93 goto out;
94
95 pdev = pdev->bus->self;
96 sprintf(prefix, "iwlwifi %s: ", pci_name(pdev));
97
98 IWL_ERR(trans, "iwlwifi parent port (%s) config registers:\n",
99 pci_name(pdev));
100 for (i = 0, ptr = buf; i < PCI_PARENT_DUMP_SIZE; i += 4, ptr++)
101 if (pci_read_config_dword(pdev, i, ptr))
102 goto err_read;
103 print_hex_dump(KERN_ERR, prefix, DUMP_PREFIX_OFFSET, 32, 4, buf, i, 0);
104
105 /* Print root port AER registers */
106 pos = 0;
107 pdev = pcie_find_root_port(pdev);
108 if (pdev)
109 pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_ERR);
110 if (pos) {
111 IWL_ERR(trans, "iwlwifi root port (%s) AER cap structure:\n",
112 pci_name(pdev));
113 sprintf(prefix, "iwlwifi %s: ", pci_name(pdev));
114 for (i = 0, ptr = buf; i <= PCI_ERR_ROOT_ERR_SRC; i += 4, ptr++)
115 if (pci_read_config_dword(pdev, pos + i, ptr))
116 goto err_read;
117 print_hex_dump(KERN_ERR, prefix, DUMP_PREFIX_OFFSET, 32,
118 4, buf, i, 0);
119 }
120 goto out;
121
122err_read:
123 print_hex_dump(KERN_ERR, prefix, DUMP_PREFIX_OFFSET, 32, 4, buf, i, 0);
124 IWL_ERR(trans, "Read failed at 0x%X\n", i);
125out:
126 trans_pcie->pcie_dbg_dumped_once = 1;
127 kfree(buf);
128}
129
130static int iwl_trans_pcie_sw_reset(struct iwl_trans *trans,
131 bool retake_ownership)
132{
133 /* Reset entire device - do controller reset (results in SHRD_HW_RST) */
134 if (trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_BZ) {
135 iwl_set_bit(trans, CSR_GP_CNTRL,
136 CSR_GP_CNTRL_REG_FLAG_SW_RESET);
137 usleep_range(10000, 20000);
138 } else {
139 iwl_set_bit(trans, CSR_RESET,
140 CSR_RESET_REG_FLAG_SW_RESET);
141 usleep_range(5000, 6000);
142 }
143
144 if (retake_ownership)
145 return iwl_pcie_prepare_card_hw(trans);
146
147 return 0;
148}
149
150static void iwl_pcie_free_fw_monitor(struct iwl_trans *trans)
151{
152 struct iwl_dram_data *fw_mon = &trans->dbg.fw_mon;
153
154 if (!fw_mon->size)
155 return;
156
157 dma_free_coherent(trans->dev, fw_mon->size, fw_mon->block,
158 fw_mon->physical);
159
160 fw_mon->block = NULL;
161 fw_mon->physical = 0;
162 fw_mon->size = 0;
163}
164
165static void iwl_pcie_alloc_fw_monitor_block(struct iwl_trans *trans,
166 u8 max_power)
167{
168 struct iwl_dram_data *fw_mon = &trans->dbg.fw_mon;
169 void *block = NULL;
170 dma_addr_t physical = 0;
171 u32 size = 0;
172 u8 power;
173
174 if (fw_mon->size) {
175 memset(fw_mon->block, 0, fw_mon->size);
176 return;
177 }
178
179 /* need at least 2 KiB, so stop at 11 */
180 for (power = max_power; power >= 11; power--) {
181 size = BIT(power);
182 block = dma_alloc_coherent(trans->dev, size, &physical,
183 GFP_KERNEL | __GFP_NOWARN);
184 if (!block)
185 continue;
186
187 IWL_INFO(trans,
188 "Allocated 0x%08x bytes for firmware monitor.\n",
189 size);
190 break;
191 }
192
193 if (WARN_ON_ONCE(!block))
194 return;
195
196 if (power != max_power)
197 IWL_ERR(trans,
198 "Sorry - debug buffer is only %luK while you requested %luK\n",
199 (unsigned long)BIT(power - 10),
200 (unsigned long)BIT(max_power - 10));
201
202 fw_mon->block = block;
203 fw_mon->physical = physical;
204 fw_mon->size = size;
205}
206
207void iwl_pcie_alloc_fw_monitor(struct iwl_trans *trans, u8 max_power)
208{
209 if (!max_power) {
210 /* default max_power is maximum */
211 max_power = 26;
212 } else {
213 max_power += 11;
214 }
215
216 if (WARN(max_power > 26,
217 "External buffer size for monitor is too big %d, check the FW TLV\n",
218 max_power))
219 return;
220
221 iwl_pcie_alloc_fw_monitor_block(trans, max_power);
222}
223
224static u32 iwl_trans_pcie_read_shr(struct iwl_trans *trans, u32 reg)
225{
226 iwl_write32(trans, HEEP_CTRL_WRD_PCIEX_CTRL_REG,
227 ((reg & 0x0000ffff) | (2 << 28)));
228 return iwl_read32(trans, HEEP_CTRL_WRD_PCIEX_DATA_REG);
229}
230
231static void iwl_trans_pcie_write_shr(struct iwl_trans *trans, u32 reg, u32 val)
232{
233 iwl_write32(trans, HEEP_CTRL_WRD_PCIEX_DATA_REG, val);
234 iwl_write32(trans, HEEP_CTRL_WRD_PCIEX_CTRL_REG,
235 ((reg & 0x0000ffff) | (3 << 28)));
236}
237
238static void iwl_pcie_set_pwr(struct iwl_trans *trans, bool vaux)
239{
240 if (trans->cfg->apmg_not_supported)
241 return;
242
243 if (vaux && pci_pme_capable(to_pci_dev(trans->dev), PCI_D3cold))
244 iwl_set_bits_mask_prph(trans, APMG_PS_CTRL_REG,
245 APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
246 ~APMG_PS_CTRL_MSK_PWR_SRC);
247 else
248 iwl_set_bits_mask_prph(trans, APMG_PS_CTRL_REG,
249 APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
250 ~APMG_PS_CTRL_MSK_PWR_SRC);
251}
252
253/* PCI registers */
254#define PCI_CFG_RETRY_TIMEOUT 0x041
255
256void iwl_pcie_apm_config(struct iwl_trans *trans)
257{
258 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
259 u16 lctl;
260 u16 cap;
261
262 /*
263 * L0S states have been found to be unstable with our devices
264 * and in newer hardware they are not officially supported at
265 * all, so we must always set the L0S_DISABLED bit.
266 */
267 iwl_set_bit(trans, CSR_GIO_REG, CSR_GIO_REG_VAL_L0S_DISABLED);
268
269 pcie_capability_read_word(trans_pcie->pci_dev, PCI_EXP_LNKCTL, &lctl);
270 trans->pm_support = !(lctl & PCI_EXP_LNKCTL_ASPM_L0S);
271
272 pcie_capability_read_word(trans_pcie->pci_dev, PCI_EXP_DEVCTL2, &cap);
273 trans->ltr_enabled = cap & PCI_EXP_DEVCTL2_LTR_EN;
274 IWL_DEBUG_POWER(trans, "L1 %sabled - LTR %sabled\n",
275 (lctl & PCI_EXP_LNKCTL_ASPM_L1) ? "En" : "Dis",
276 trans->ltr_enabled ? "En" : "Dis");
277}
278
279/*
280 * Start up NIC's basic functionality after it has been reset
281 * (e.g. after platform boot, or shutdown via iwl_pcie_apm_stop())
282 * NOTE: This does not load uCode nor start the embedded processor
283 */
284static int iwl_pcie_apm_init(struct iwl_trans *trans)
285{
286 int ret;
287
288 IWL_DEBUG_INFO(trans, "Init card's basic functions\n");
289
290 /*
291 * Use "set_bit" below rather than "write", to preserve any hardware
292 * bits already set by default after reset.
293 */
294
295 /* Disable L0S exit timer (platform NMI Work/Around) */
296 if (trans->trans_cfg->device_family < IWL_DEVICE_FAMILY_8000)
297 iwl_set_bit(trans, CSR_GIO_CHICKEN_BITS,
298 CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
299
300 /*
301 * Disable L0s without affecting L1;
302 * don't wait for ICH L0s (ICH bug W/A)
303 */
304 iwl_set_bit(trans, CSR_GIO_CHICKEN_BITS,
305 CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
306
307 /* Set FH wait threshold to maximum (HW error during stress W/A) */
308 iwl_set_bit(trans, CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL);
309
310 /*
311 * Enable HAP INTA (interrupt from management bus) to
312 * wake device's PCI Express link L1a -> L0s
313 */
314 iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG,
315 CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
316
317 iwl_pcie_apm_config(trans);
318
319 /* Configure analog phase-lock-loop before activating to D0A */
320 if (trans->trans_cfg->base_params->pll_cfg)
321 iwl_set_bit(trans, CSR_ANA_PLL_CFG, CSR50_ANA_PLL_CFG_VAL);
322
323 ret = iwl_finish_nic_init(trans);
324 if (ret)
325 return ret;
326
327 if (trans->cfg->host_interrupt_operation_mode) {
328 /*
329 * This is a bit of an abuse - This is needed for 7260 / 3160
330 * only check host_interrupt_operation_mode even if this is
331 * not related to host_interrupt_operation_mode.
332 *
333 * Enable the oscillator to count wake up time for L1 exit. This
334 * consumes slightly more power (100uA) - but allows to be sure
335 * that we wake up from L1 on time.
336 *
337 * This looks weird: read twice the same register, discard the
338 * value, set a bit, and yet again, read that same register
339 * just to discard the value. But that's the way the hardware
340 * seems to like it.
341 */
342 iwl_read_prph(trans, OSC_CLK);
343 iwl_read_prph(trans, OSC_CLK);
344 iwl_set_bits_prph(trans, OSC_CLK, OSC_CLK_FORCE_CONTROL);
345 iwl_read_prph(trans, OSC_CLK);
346 iwl_read_prph(trans, OSC_CLK);
347 }
348
349 /*
350 * Enable DMA clock and wait for it to stabilize.
351 *
352 * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0"
353 * bits do not disable clocks. This preserves any hardware
354 * bits already set by default in "CLK_CTRL_REG" after reset.
355 */
356 if (!trans->cfg->apmg_not_supported) {
357 iwl_write_prph(trans, APMG_CLK_EN_REG,
358 APMG_CLK_VAL_DMA_CLK_RQT);
359 udelay(20);
360
361 /* Disable L1-Active */
362 iwl_set_bits_prph(trans, APMG_PCIDEV_STT_REG,
363 APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
364
365 /* Clear the interrupt in APMG if the NIC is in RFKILL */
366 iwl_write_prph(trans, APMG_RTC_INT_STT_REG,
367 APMG_RTC_INT_STT_RFKILL);
368 }
369
370 set_bit(STATUS_DEVICE_ENABLED, &trans->status);
371
372 return 0;
373}
374
375/*
376 * Enable LP XTAL to avoid HW bug where device may consume much power if
377 * FW is not loaded after device reset. LP XTAL is disabled by default
378 * after device HW reset. Do it only if XTAL is fed by internal source.
379 * Configure device's "persistence" mode to avoid resetting XTAL again when
380 * SHRD_HW_RST occurs in S3.
381 */
382static void iwl_pcie_apm_lp_xtal_enable(struct iwl_trans *trans)
383{
384 int ret;
385 u32 apmg_gp1_reg;
386 u32 apmg_xtal_cfg_reg;
387 u32 dl_cfg_reg;
388
389 /* Force XTAL ON */
390 __iwl_trans_pcie_set_bit(trans, CSR_GP_CNTRL,
391 CSR_GP_CNTRL_REG_FLAG_XTAL_ON);
392
393 ret = iwl_trans_pcie_sw_reset(trans, true);
394
395 if (!ret)
396 ret = iwl_finish_nic_init(trans);
397
398 if (WARN_ON(ret)) {
399 /* Release XTAL ON request */
400 __iwl_trans_pcie_clear_bit(trans, CSR_GP_CNTRL,
401 CSR_GP_CNTRL_REG_FLAG_XTAL_ON);
402 return;
403 }
404
405 /*
406 * Clear "disable persistence" to avoid LP XTAL resetting when
407 * SHRD_HW_RST is applied in S3.
408 */
409 iwl_clear_bits_prph(trans, APMG_PCIDEV_STT_REG,
410 APMG_PCIDEV_STT_VAL_PERSIST_DIS);
411
412 /*
413 * Force APMG XTAL to be active to prevent its disabling by HW
414 * caused by APMG idle state.
415 */
416 apmg_xtal_cfg_reg = iwl_trans_pcie_read_shr(trans,
417 SHR_APMG_XTAL_CFG_REG);
418 iwl_trans_pcie_write_shr(trans, SHR_APMG_XTAL_CFG_REG,
419 apmg_xtal_cfg_reg |
420 SHR_APMG_XTAL_CFG_XTAL_ON_REQ);
421
422 ret = iwl_trans_pcie_sw_reset(trans, true);
423 if (ret)
424 IWL_ERR(trans,
425 "iwl_pcie_apm_lp_xtal_enable: failed to retake NIC ownership\n");
426
427 /* Enable LP XTAL by indirect access through CSR */
428 apmg_gp1_reg = iwl_trans_pcie_read_shr(trans, SHR_APMG_GP1_REG);
429 iwl_trans_pcie_write_shr(trans, SHR_APMG_GP1_REG, apmg_gp1_reg |
430 SHR_APMG_GP1_WF_XTAL_LP_EN |
431 SHR_APMG_GP1_CHICKEN_BIT_SELECT);
432
433 /* Clear delay line clock power up */
434 dl_cfg_reg = iwl_trans_pcie_read_shr(trans, SHR_APMG_DL_CFG_REG);
435 iwl_trans_pcie_write_shr(trans, SHR_APMG_DL_CFG_REG, dl_cfg_reg &
436 ~SHR_APMG_DL_CFG_DL_CLOCK_POWER_UP);
437
438 /*
439 * Enable persistence mode to avoid LP XTAL resetting when
440 * SHRD_HW_RST is applied in S3.
441 */
442 iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG,
443 CSR_HW_IF_CONFIG_REG_PERSIST_MODE);
444
445 /*
446 * Clear "initialization complete" bit to move adapter from
447 * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
448 */
449 iwl_clear_bit(trans, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
450
451 /* Activates XTAL resources monitor */
452 __iwl_trans_pcie_set_bit(trans, CSR_MONITOR_CFG_REG,
453 CSR_MONITOR_XTAL_RESOURCES);
454
455 /* Release XTAL ON request */
456 __iwl_trans_pcie_clear_bit(trans, CSR_GP_CNTRL,
457 CSR_GP_CNTRL_REG_FLAG_XTAL_ON);
458 udelay(10);
459
460 /* Release APMG XTAL */
461 iwl_trans_pcie_write_shr(trans, SHR_APMG_XTAL_CFG_REG,
462 apmg_xtal_cfg_reg &
463 ~SHR_APMG_XTAL_CFG_XTAL_ON_REQ);
464}
465
466void iwl_pcie_apm_stop_master(struct iwl_trans *trans)
467{
468 int ret;
469
470 /* stop device's busmaster DMA activity */
471
472 if (trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_BZ) {
473 iwl_set_bit(trans, CSR_GP_CNTRL,
474 CSR_GP_CNTRL_REG_FLAG_BUS_MASTER_DISABLE_REQ);
475
476 ret = iwl_poll_bit(trans, CSR_GP_CNTRL,
477 CSR_GP_CNTRL_REG_FLAG_BUS_MASTER_DISABLE_STATUS,
478 CSR_GP_CNTRL_REG_FLAG_BUS_MASTER_DISABLE_STATUS,
479 100);
480 usleep_range(10000, 20000);
481 } else {
482 iwl_set_bit(trans, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
483
484 ret = iwl_poll_bit(trans, CSR_RESET,
485 CSR_RESET_REG_FLAG_MASTER_DISABLED,
486 CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
487 }
488
489 if (ret < 0)
490 IWL_WARN(trans, "Master Disable Timed Out, 100 usec\n");
491
492 IWL_DEBUG_INFO(trans, "stop master\n");
493}
494
495static void iwl_pcie_apm_stop(struct iwl_trans *trans, bool op_mode_leave)
496{
497 IWL_DEBUG_INFO(trans, "Stop card, put in low power state\n");
498
499 if (op_mode_leave) {
500 if (!test_bit(STATUS_DEVICE_ENABLED, &trans->status))
501 iwl_pcie_apm_init(trans);
502
503 /* inform ME that we are leaving */
504 if (trans->trans_cfg->device_family == IWL_DEVICE_FAMILY_7000)
505 iwl_set_bits_prph(trans, APMG_PCIDEV_STT_REG,
506 APMG_PCIDEV_STT_VAL_WAKE_ME);
507 else if (trans->trans_cfg->device_family >=
508 IWL_DEVICE_FAMILY_8000) {
509 iwl_set_bit(trans, CSR_DBG_LINK_PWR_MGMT_REG,
510 CSR_RESET_LINK_PWR_MGMT_DISABLED);
511 iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG,
512 CSR_HW_IF_CONFIG_REG_PREPARE |
513 CSR_HW_IF_CONFIG_REG_ENABLE_PME);
514 mdelay(1);
515 iwl_clear_bit(trans, CSR_DBG_LINK_PWR_MGMT_REG,
516 CSR_RESET_LINK_PWR_MGMT_DISABLED);
517 }
518 mdelay(5);
519 }
520
521 clear_bit(STATUS_DEVICE_ENABLED, &trans->status);
522
523 /* Stop device's DMA activity */
524 iwl_pcie_apm_stop_master(trans);
525
526 if (trans->cfg->lp_xtal_workaround) {
527 iwl_pcie_apm_lp_xtal_enable(trans);
528 return;
529 }
530
531 iwl_trans_pcie_sw_reset(trans, false);
532
533 /*
534 * Clear "initialization complete" bit to move adapter from
535 * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
536 */
537 iwl_clear_bit(trans, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
538}
539
540static int iwl_pcie_nic_init(struct iwl_trans *trans)
541{
542 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
543 int ret;
544
545 /* nic_init */
546 spin_lock_bh(&trans_pcie->irq_lock);
547 ret = iwl_pcie_apm_init(trans);
548 spin_unlock_bh(&trans_pcie->irq_lock);
549
550 if (ret)
551 return ret;
552
553 iwl_pcie_set_pwr(trans, false);
554
555 iwl_op_mode_nic_config(trans->op_mode);
556
557 /* Allocate the RX queue, or reset if it is already allocated */
558 ret = iwl_pcie_rx_init(trans);
559 if (ret)
560 return ret;
561
562 /* Allocate or reset and init all Tx and Command queues */
563 if (iwl_pcie_tx_init(trans)) {
564 iwl_pcie_rx_free(trans);
565 return -ENOMEM;
566 }
567
568 if (trans->trans_cfg->base_params->shadow_reg_enable) {
569 /* enable shadow regs in HW */
570 iwl_set_bit(trans, CSR_MAC_SHADOW_REG_CTRL, 0x800FFFFF);
571 IWL_DEBUG_INFO(trans, "Enabling shadow registers in device\n");
572 }
573
574 return 0;
575}
576
577#define HW_READY_TIMEOUT (50)
578
579/* Note: returns poll_bit return value, which is >= 0 if success */
580static int iwl_pcie_set_hw_ready(struct iwl_trans *trans)
581{
582 int ret;
583
584 iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG,
585 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY);
586
587 /* See if we got it */
588 ret = iwl_poll_bit(trans, CSR_HW_IF_CONFIG_REG,
589 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
590 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
591 HW_READY_TIMEOUT);
592
593 if (ret >= 0)
594 iwl_set_bit(trans, CSR_MBOX_SET_REG, CSR_MBOX_SET_REG_OS_ALIVE);
595
596 IWL_DEBUG_INFO(trans, "hardware%s ready\n", ret < 0 ? " not" : "");
597 return ret;
598}
599
600/* Note: returns standard 0/-ERROR code */
601int iwl_pcie_prepare_card_hw(struct iwl_trans *trans)
602{
603 int ret;
604 int iter;
605
606 IWL_DEBUG_INFO(trans, "iwl_trans_prepare_card_hw enter\n");
607
608 ret = iwl_pcie_set_hw_ready(trans);
609 /* If the card is ready, exit 0 */
610 if (ret >= 0) {
611 trans->csme_own = false;
612 return 0;
613 }
614
615 iwl_set_bit(trans, CSR_DBG_LINK_PWR_MGMT_REG,
616 CSR_RESET_LINK_PWR_MGMT_DISABLED);
617 usleep_range(1000, 2000);
618
619 for (iter = 0; iter < 10; iter++) {
620 int t = 0;
621
622 /* If HW is not ready, prepare the conditions to check again */
623 iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG,
624 CSR_HW_IF_CONFIG_REG_PREPARE);
625
626 do {
627 ret = iwl_pcie_set_hw_ready(trans);
628 if (ret >= 0) {
629 trans->csme_own = false;
630 return 0;
631 }
632
633 if (iwl_mei_is_connected()) {
634 IWL_DEBUG_INFO(trans,
635 "Couldn't prepare the card but SAP is connected\n");
636 trans->csme_own = true;
637 if (trans->trans_cfg->device_family !=
638 IWL_DEVICE_FAMILY_9000)
639 IWL_ERR(trans,
640 "SAP not supported for this NIC family\n");
641
642 return -EBUSY;
643 }
644
645 usleep_range(200, 1000);
646 t += 200;
647 } while (t < 150000);
648 msleep(25);
649 }
650
651 IWL_ERR(trans, "Couldn't prepare the card\n");
652
653 return ret;
654}
655
656/*
657 * ucode
658 */
659static void iwl_pcie_load_firmware_chunk_fh(struct iwl_trans *trans,
660 u32 dst_addr, dma_addr_t phy_addr,
661 u32 byte_cnt)
662{
663 iwl_write32(trans, FH_TCSR_CHNL_TX_CONFIG_REG(FH_SRVC_CHNL),
664 FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_PAUSE);
665
666 iwl_write32(trans, FH_SRVC_CHNL_SRAM_ADDR_REG(FH_SRVC_CHNL),
667 dst_addr);
668
669 iwl_write32(trans, FH_TFDIB_CTRL0_REG(FH_SRVC_CHNL),
670 phy_addr & FH_MEM_TFDIB_DRAM_ADDR_LSB_MSK);
671
672 iwl_write32(trans, FH_TFDIB_CTRL1_REG(FH_SRVC_CHNL),
673 (iwl_get_dma_hi_addr(phy_addr)
674 << FH_MEM_TFDIB_REG1_ADDR_BITSHIFT) | byte_cnt);
675
676 iwl_write32(trans, FH_TCSR_CHNL_TX_BUF_STS_REG(FH_SRVC_CHNL),
677 BIT(FH_TCSR_CHNL_TX_BUF_STS_REG_POS_TB_NUM) |
678 BIT(FH_TCSR_CHNL_TX_BUF_STS_REG_POS_TB_IDX) |
679 FH_TCSR_CHNL_TX_BUF_STS_REG_VAL_TFDB_VALID);
680
681 iwl_write32(trans, FH_TCSR_CHNL_TX_CONFIG_REG(FH_SRVC_CHNL),
682 FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE |
683 FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_DISABLE |
684 FH_TCSR_TX_CONFIG_REG_VAL_CIRQ_HOST_ENDTFD);
685}
686
687static int iwl_pcie_load_firmware_chunk(struct iwl_trans *trans,
688 u32 dst_addr, dma_addr_t phy_addr,
689 u32 byte_cnt)
690{
691 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
692 int ret;
693
694 trans_pcie->ucode_write_complete = false;
695
696 if (!iwl_trans_grab_nic_access(trans))
697 return -EIO;
698
699 iwl_pcie_load_firmware_chunk_fh(trans, dst_addr, phy_addr,
700 byte_cnt);
701 iwl_trans_release_nic_access(trans);
702
703 ret = wait_event_timeout(trans_pcie->ucode_write_waitq,
704 trans_pcie->ucode_write_complete, 5 * HZ);
705 if (!ret) {
706 IWL_ERR(trans, "Failed to load firmware chunk!\n");
707 iwl_trans_pcie_dump_regs(trans);
708 return -ETIMEDOUT;
709 }
710
711 return 0;
712}
713
714static int iwl_pcie_load_section(struct iwl_trans *trans, u8 section_num,
715 const struct fw_desc *section)
716{
717 u8 *v_addr;
718 dma_addr_t p_addr;
719 u32 offset, chunk_sz = min_t(u32, FH_MEM_TB_MAX_LENGTH, section->len);
720 int ret = 0;
721
722 IWL_DEBUG_FW(trans, "[%d] uCode section being loaded...\n",
723 section_num);
724
725 v_addr = dma_alloc_coherent(trans->dev, chunk_sz, &p_addr,
726 GFP_KERNEL | __GFP_NOWARN);
727 if (!v_addr) {
728 IWL_DEBUG_INFO(trans, "Falling back to small chunks of DMA\n");
729 chunk_sz = PAGE_SIZE;
730 v_addr = dma_alloc_coherent(trans->dev, chunk_sz,
731 &p_addr, GFP_KERNEL);
732 if (!v_addr)
733 return -ENOMEM;
734 }
735
736 for (offset = 0; offset < section->len; offset += chunk_sz) {
737 u32 copy_size, dst_addr;
738 bool extended_addr = false;
739
740 copy_size = min_t(u32, chunk_sz, section->len - offset);
741 dst_addr = section->offset + offset;
742
743 if (dst_addr >= IWL_FW_MEM_EXTENDED_START &&
744 dst_addr <= IWL_FW_MEM_EXTENDED_END)
745 extended_addr = true;
746
747 if (extended_addr)
748 iwl_set_bits_prph(trans, LMPM_CHICK,
749 LMPM_CHICK_EXTENDED_ADDR_SPACE);
750
751 memcpy(v_addr, (const u8 *)section->data + offset, copy_size);
752 ret = iwl_pcie_load_firmware_chunk(trans, dst_addr, p_addr,
753 copy_size);
754
755 if (extended_addr)
756 iwl_clear_bits_prph(trans, LMPM_CHICK,
757 LMPM_CHICK_EXTENDED_ADDR_SPACE);
758
759 if (ret) {
760 IWL_ERR(trans,
761 "Could not load the [%d] uCode section\n",
762 section_num);
763 break;
764 }
765 }
766
767 dma_free_coherent(trans->dev, chunk_sz, v_addr, p_addr);
768 return ret;
769}
770
771static int iwl_pcie_load_cpu_sections_8000(struct iwl_trans *trans,
772 const struct fw_img *image,
773 int cpu,
774 int *first_ucode_section)
775{
776 int shift_param;
777 int i, ret = 0, sec_num = 0x1;
778 u32 val, last_read_idx = 0;
779
780 if (cpu == 1) {
781 shift_param = 0;
782 *first_ucode_section = 0;
783 } else {
784 shift_param = 16;
785 (*first_ucode_section)++;
786 }
787
788 for (i = *first_ucode_section; i < image->num_sec; i++) {
789 last_read_idx = i;
790
791 /*
792 * CPU1_CPU2_SEPARATOR_SECTION delimiter - separate between
793 * CPU1 to CPU2.
794 * PAGING_SEPARATOR_SECTION delimiter - separate between
795 * CPU2 non paged to CPU2 paging sec.
796 */
797 if (!image->sec[i].data ||
798 image->sec[i].offset == CPU1_CPU2_SEPARATOR_SECTION ||
799 image->sec[i].offset == PAGING_SEPARATOR_SECTION) {
800 IWL_DEBUG_FW(trans,
801 "Break since Data not valid or Empty section, sec = %d\n",
802 i);
803 break;
804 }
805
806 ret = iwl_pcie_load_section(trans, i, &image->sec[i]);
807 if (ret)
808 return ret;
809
810 /* Notify ucode of loaded section number and status */
811 val = iwl_read_direct32(trans, FH_UCODE_LOAD_STATUS);
812 val = val | (sec_num << shift_param);
813 iwl_write_direct32(trans, FH_UCODE_LOAD_STATUS, val);
814
815 sec_num = (sec_num << 1) | 0x1;
816 }
817
818 *first_ucode_section = last_read_idx;
819
820 iwl_enable_interrupts(trans);
821
822 if (trans->trans_cfg->gen2) {
823 if (cpu == 1)
824 iwl_write_prph(trans, UREG_UCODE_LOAD_STATUS,
825 0xFFFF);
826 else
827 iwl_write_prph(trans, UREG_UCODE_LOAD_STATUS,
828 0xFFFFFFFF);
829 } else {
830 if (cpu == 1)
831 iwl_write_direct32(trans, FH_UCODE_LOAD_STATUS,
832 0xFFFF);
833 else
834 iwl_write_direct32(trans, FH_UCODE_LOAD_STATUS,
835 0xFFFFFFFF);
836 }
837
838 return 0;
839}
840
841static int iwl_pcie_load_cpu_sections(struct iwl_trans *trans,
842 const struct fw_img *image,
843 int cpu,
844 int *first_ucode_section)
845{
846 int i, ret = 0;
847 u32 last_read_idx = 0;
848
849 if (cpu == 1)
850 *first_ucode_section = 0;
851 else
852 (*first_ucode_section)++;
853
854 for (i = *first_ucode_section; i < image->num_sec; i++) {
855 last_read_idx = i;
856
857 /*
858 * CPU1_CPU2_SEPARATOR_SECTION delimiter - separate between
859 * CPU1 to CPU2.
860 * PAGING_SEPARATOR_SECTION delimiter - separate between
861 * CPU2 non paged to CPU2 paging sec.
862 */
863 if (!image->sec[i].data ||
864 image->sec[i].offset == CPU1_CPU2_SEPARATOR_SECTION ||
865 image->sec[i].offset == PAGING_SEPARATOR_SECTION) {
866 IWL_DEBUG_FW(trans,
867 "Break since Data not valid or Empty section, sec = %d\n",
868 i);
869 break;
870 }
871
872 ret = iwl_pcie_load_section(trans, i, &image->sec[i]);
873 if (ret)
874 return ret;
875 }
876
877 *first_ucode_section = last_read_idx;
878
879 return 0;
880}
881
882static void iwl_pcie_apply_destination_ini(struct iwl_trans *trans)
883{
884 enum iwl_fw_ini_allocation_id alloc_id = IWL_FW_INI_ALLOCATION_ID_DBGC1;
885 struct iwl_fw_ini_allocation_tlv *fw_mon_cfg =
886 &trans->dbg.fw_mon_cfg[alloc_id];
887 struct iwl_dram_data *frag;
888
889 if (!iwl_trans_dbg_ini_valid(trans))
890 return;
891
892 if (le32_to_cpu(fw_mon_cfg->buf_location) ==
893 IWL_FW_INI_LOCATION_SRAM_PATH) {
894 IWL_DEBUG_FW(trans, "WRT: Applying SMEM buffer destination\n");
895 /* set sram monitor by enabling bit 7 */
896 iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG,
897 CSR_HW_IF_CONFIG_REG_BIT_MONITOR_SRAM);
898
899 return;
900 }
901
902 if (le32_to_cpu(fw_mon_cfg->buf_location) !=
903 IWL_FW_INI_LOCATION_DRAM_PATH ||
904 !trans->dbg.fw_mon_ini[alloc_id].num_frags)
905 return;
906
907 frag = &trans->dbg.fw_mon_ini[alloc_id].frags[0];
908
909 IWL_DEBUG_FW(trans, "WRT: Applying DRAM destination (alloc_id=%u)\n",
910 alloc_id);
911
912 iwl_write_umac_prph(trans, MON_BUFF_BASE_ADDR_VER2,
913 frag->physical >> MON_BUFF_SHIFT_VER2);
914 iwl_write_umac_prph(trans, MON_BUFF_END_ADDR_VER2,
915 (frag->physical + frag->size - 256) >>
916 MON_BUFF_SHIFT_VER2);
917}
918
919void iwl_pcie_apply_destination(struct iwl_trans *trans)
920{
921 const struct iwl_fw_dbg_dest_tlv_v1 *dest = trans->dbg.dest_tlv;
922 const struct iwl_dram_data *fw_mon = &trans->dbg.fw_mon;
923 int i;
924
925 if (iwl_trans_dbg_ini_valid(trans)) {
926 iwl_pcie_apply_destination_ini(trans);
927 return;
928 }
929
930 IWL_INFO(trans, "Applying debug destination %s\n",
931 get_fw_dbg_mode_string(dest->monitor_mode));
932
933 if (dest->monitor_mode == EXTERNAL_MODE)
934 iwl_pcie_alloc_fw_monitor(trans, dest->size_power);
935 else
936 IWL_WARN(trans, "PCI should have external buffer debug\n");
937
938 for (i = 0; i < trans->dbg.n_dest_reg; i++) {
939 u32 addr = le32_to_cpu(dest->reg_ops[i].addr);
940 u32 val = le32_to_cpu(dest->reg_ops[i].val);
941
942 switch (dest->reg_ops[i].op) {
943 case CSR_ASSIGN:
944 iwl_write32(trans, addr, val);
945 break;
946 case CSR_SETBIT:
947 iwl_set_bit(trans, addr, BIT(val));
948 break;
949 case CSR_CLEARBIT:
950 iwl_clear_bit(trans, addr, BIT(val));
951 break;
952 case PRPH_ASSIGN:
953 iwl_write_prph(trans, addr, val);
954 break;
955 case PRPH_SETBIT:
956 iwl_set_bits_prph(trans, addr, BIT(val));
957 break;
958 case PRPH_CLEARBIT:
959 iwl_clear_bits_prph(trans, addr, BIT(val));
960 break;
961 case PRPH_BLOCKBIT:
962 if (iwl_read_prph(trans, addr) & BIT(val)) {
963 IWL_ERR(trans,
964 "BIT(%u) in address 0x%x is 1, stopping FW configuration\n",
965 val, addr);
966 goto monitor;
967 }
968 break;
969 default:
970 IWL_ERR(trans, "FW debug - unknown OP %d\n",
971 dest->reg_ops[i].op);
972 break;
973 }
974 }
975
976monitor:
977 if (dest->monitor_mode == EXTERNAL_MODE && fw_mon->size) {
978 iwl_write_prph(trans, le32_to_cpu(dest->base_reg),
979 fw_mon->physical >> dest->base_shift);
980 if (trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_8000)
981 iwl_write_prph(trans, le32_to_cpu(dest->end_reg),
982 (fw_mon->physical + fw_mon->size -
983 256) >> dest->end_shift);
984 else
985 iwl_write_prph(trans, le32_to_cpu(dest->end_reg),
986 (fw_mon->physical + fw_mon->size) >>
987 dest->end_shift);
988 }
989}
990
991static int iwl_pcie_load_given_ucode(struct iwl_trans *trans,
992 const struct fw_img *image)
993{
994 int ret = 0;
995 int first_ucode_section;
996
997 IWL_DEBUG_FW(trans, "working with %s CPU\n",
998 image->is_dual_cpus ? "Dual" : "Single");
999
1000 /* load to FW the binary non secured sections of CPU1 */
1001 ret = iwl_pcie_load_cpu_sections(trans, image, 1, &first_ucode_section);
1002 if (ret)
1003 return ret;
1004
1005 if (image->is_dual_cpus) {
1006 /* set CPU2 header address */
1007 iwl_write_prph(trans,
1008 LMPM_SECURE_UCODE_LOAD_CPU2_HDR_ADDR,
1009 LMPM_SECURE_CPU2_HDR_MEM_SPACE);
1010
1011 /* load to FW the binary sections of CPU2 */
1012 ret = iwl_pcie_load_cpu_sections(trans, image, 2,
1013 &first_ucode_section);
1014 if (ret)
1015 return ret;
1016 }
1017
1018 if (iwl_pcie_dbg_on(trans))
1019 iwl_pcie_apply_destination(trans);
1020
1021 iwl_enable_interrupts(trans);
1022
1023 /* release CPU reset */
1024 iwl_write32(trans, CSR_RESET, 0);
1025
1026 return 0;
1027}
1028
1029static int iwl_pcie_load_given_ucode_8000(struct iwl_trans *trans,
1030 const struct fw_img *image)
1031{
1032 int ret = 0;
1033 int first_ucode_section;
1034
1035 IWL_DEBUG_FW(trans, "working with %s CPU\n",
1036 image->is_dual_cpus ? "Dual" : "Single");
1037
1038 if (iwl_pcie_dbg_on(trans))
1039 iwl_pcie_apply_destination(trans);
1040
1041 IWL_DEBUG_POWER(trans, "Original WFPM value = 0x%08X\n",
1042 iwl_read_prph(trans, WFPM_GP2));
1043
1044 /*
1045 * Set default value. On resume reading the values that were
1046 * zeored can provide debug data on the resume flow.
1047 * This is for debugging only and has no functional impact.
1048 */
1049 iwl_write_prph(trans, WFPM_GP2, 0x01010101);
1050
1051 /* configure the ucode to be ready to get the secured image */
1052 /* release CPU reset */
1053 iwl_write_prph(trans, RELEASE_CPU_RESET, RELEASE_CPU_RESET_BIT);
1054
1055 /* load to FW the binary Secured sections of CPU1 */
1056 ret = iwl_pcie_load_cpu_sections_8000(trans, image, 1,
1057 &first_ucode_section);
1058 if (ret)
1059 return ret;
1060
1061 /* load to FW the binary sections of CPU2 */
1062 return iwl_pcie_load_cpu_sections_8000(trans, image, 2,
1063 &first_ucode_section);
1064}
1065
1066bool iwl_pcie_check_hw_rf_kill(struct iwl_trans *trans)
1067{
1068 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1069 bool hw_rfkill = iwl_is_rfkill_set(trans);
1070 bool prev = test_bit(STATUS_RFKILL_OPMODE, &trans->status);
1071 bool report;
1072
1073 if (hw_rfkill) {
1074 set_bit(STATUS_RFKILL_HW, &trans->status);
1075 set_bit(STATUS_RFKILL_OPMODE, &trans->status);
1076 } else {
1077 clear_bit(STATUS_RFKILL_HW, &trans->status);
1078 if (trans_pcie->opmode_down)
1079 clear_bit(STATUS_RFKILL_OPMODE, &trans->status);
1080 }
1081
1082 report = test_bit(STATUS_RFKILL_OPMODE, &trans->status);
1083
1084 if (prev != report)
1085 iwl_trans_pcie_rf_kill(trans, report, false);
1086
1087 return hw_rfkill;
1088}
1089
1090struct iwl_causes_list {
1091 u16 mask_reg;
1092 u8 bit;
1093 u8 addr;
1094};
1095
1096#define IWL_CAUSE(reg, mask) \
1097 { \
1098 .mask_reg = reg, \
1099 .bit = ilog2(mask), \
1100 .addr = ilog2(mask) + \
1101 ((reg) == CSR_MSIX_FH_INT_MASK_AD ? -16 : \
1102 (reg) == CSR_MSIX_HW_INT_MASK_AD ? 16 : \
1103 0xffff), /* causes overflow warning */ \
1104 }
1105
1106static const struct iwl_causes_list causes_list_common[] = {
1107 IWL_CAUSE(CSR_MSIX_FH_INT_MASK_AD, MSIX_FH_INT_CAUSES_D2S_CH0_NUM),
1108 IWL_CAUSE(CSR_MSIX_FH_INT_MASK_AD, MSIX_FH_INT_CAUSES_D2S_CH1_NUM),
1109 IWL_CAUSE(CSR_MSIX_FH_INT_MASK_AD, MSIX_FH_INT_CAUSES_S2D),
1110 IWL_CAUSE(CSR_MSIX_FH_INT_MASK_AD, MSIX_FH_INT_CAUSES_FH_ERR),
1111 IWL_CAUSE(CSR_MSIX_HW_INT_MASK_AD, MSIX_HW_INT_CAUSES_REG_ALIVE),
1112 IWL_CAUSE(CSR_MSIX_HW_INT_MASK_AD, MSIX_HW_INT_CAUSES_REG_WAKEUP),
1113 IWL_CAUSE(CSR_MSIX_HW_INT_MASK_AD, MSIX_HW_INT_CAUSES_REG_RESET_DONE),
1114 IWL_CAUSE(CSR_MSIX_HW_INT_MASK_AD, MSIX_HW_INT_CAUSES_REG_TOP_FATAL_ERR),
1115 IWL_CAUSE(CSR_MSIX_HW_INT_MASK_AD, MSIX_HW_INT_CAUSES_REG_CT_KILL),
1116 IWL_CAUSE(CSR_MSIX_HW_INT_MASK_AD, MSIX_HW_INT_CAUSES_REG_RF_KILL),
1117 IWL_CAUSE(CSR_MSIX_HW_INT_MASK_AD, MSIX_HW_INT_CAUSES_REG_PERIODIC),
1118 IWL_CAUSE(CSR_MSIX_HW_INT_MASK_AD, MSIX_HW_INT_CAUSES_REG_SCD),
1119 IWL_CAUSE(CSR_MSIX_HW_INT_MASK_AD, MSIX_HW_INT_CAUSES_REG_FH_TX),
1120 IWL_CAUSE(CSR_MSIX_HW_INT_MASK_AD, MSIX_HW_INT_CAUSES_REG_HW_ERR),
1121 IWL_CAUSE(CSR_MSIX_HW_INT_MASK_AD, MSIX_HW_INT_CAUSES_REG_HAP),
1122};
1123
1124static const struct iwl_causes_list causes_list_pre_bz[] = {
1125 IWL_CAUSE(CSR_MSIX_HW_INT_MASK_AD, MSIX_HW_INT_CAUSES_REG_SW_ERR),
1126};
1127
1128static const struct iwl_causes_list causes_list_bz[] = {
1129 IWL_CAUSE(CSR_MSIX_HW_INT_MASK_AD, MSIX_HW_INT_CAUSES_REG_SW_ERR_BZ),
1130};
1131
1132static void iwl_pcie_map_list(struct iwl_trans *trans,
1133 const struct iwl_causes_list *causes,
1134 int arr_size, int val)
1135{
1136 int i;
1137
1138 for (i = 0; i < arr_size; i++) {
1139 iwl_write8(trans, CSR_MSIX_IVAR(causes[i].addr), val);
1140 iwl_clear_bit(trans, causes[i].mask_reg,
1141 BIT(causes[i].bit));
1142 }
1143}
1144
1145static void iwl_pcie_map_non_rx_causes(struct iwl_trans *trans)
1146{
1147 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1148 int val = trans_pcie->def_irq | MSIX_NON_AUTO_CLEAR_CAUSE;
1149 /*
1150 * Access all non RX causes and map them to the default irq.
1151 * In case we are missing at least one interrupt vector,
1152 * the first interrupt vector will serve non-RX and FBQ causes.
1153 */
1154 iwl_pcie_map_list(trans, causes_list_common,
1155 ARRAY_SIZE(causes_list_common), val);
1156 if (trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_BZ)
1157 iwl_pcie_map_list(trans, causes_list_bz,
1158 ARRAY_SIZE(causes_list_bz), val);
1159 else
1160 iwl_pcie_map_list(trans, causes_list_pre_bz,
1161 ARRAY_SIZE(causes_list_pre_bz), val);
1162}
1163
1164static void iwl_pcie_map_rx_causes(struct iwl_trans *trans)
1165{
1166 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1167 u32 offset =
1168 trans_pcie->shared_vec_mask & IWL_SHARED_IRQ_FIRST_RSS ? 1 : 0;
1169 u32 val, idx;
1170
1171 /*
1172 * The first RX queue - fallback queue, which is designated for
1173 * management frame, command responses etc, is always mapped to the
1174 * first interrupt vector. The other RX queues are mapped to
1175 * the other (N - 2) interrupt vectors.
1176 */
1177 val = BIT(MSIX_FH_INT_CAUSES_Q(0));
1178 for (idx = 1; idx < trans->num_rx_queues; idx++) {
1179 iwl_write8(trans, CSR_MSIX_RX_IVAR(idx),
1180 MSIX_FH_INT_CAUSES_Q(idx - offset));
1181 val |= BIT(MSIX_FH_INT_CAUSES_Q(idx));
1182 }
1183 iwl_write32(trans, CSR_MSIX_FH_INT_MASK_AD, ~val);
1184
1185 val = MSIX_FH_INT_CAUSES_Q(0);
1186 if (trans_pcie->shared_vec_mask & IWL_SHARED_IRQ_NON_RX)
1187 val |= MSIX_NON_AUTO_CLEAR_CAUSE;
1188 iwl_write8(trans, CSR_MSIX_RX_IVAR(0), val);
1189
1190 if (trans_pcie->shared_vec_mask & IWL_SHARED_IRQ_FIRST_RSS)
1191 iwl_write8(trans, CSR_MSIX_RX_IVAR(1), val);
1192}
1193
1194void iwl_pcie_conf_msix_hw(struct iwl_trans_pcie *trans_pcie)
1195{
1196 struct iwl_trans *trans = trans_pcie->trans;
1197
1198 if (!trans_pcie->msix_enabled) {
1199 if (trans->trans_cfg->mq_rx_supported &&
1200 test_bit(STATUS_DEVICE_ENABLED, &trans->status))
1201 iwl_write_umac_prph(trans, UREG_CHICK,
1202 UREG_CHICK_MSI_ENABLE);
1203 return;
1204 }
1205 /*
1206 * The IVAR table needs to be configured again after reset,
1207 * but if the device is disabled, we can't write to
1208 * prph.
1209 */
1210 if (test_bit(STATUS_DEVICE_ENABLED, &trans->status))
1211 iwl_write_umac_prph(trans, UREG_CHICK, UREG_CHICK_MSIX_ENABLE);
1212
1213 /*
1214 * Each cause from the causes list above and the RX causes is
1215 * represented as a byte in the IVAR table. The first nibble
1216 * represents the bound interrupt vector of the cause, the second
1217 * represents no auto clear for this cause. This will be set if its
1218 * interrupt vector is bound to serve other causes.
1219 */
1220 iwl_pcie_map_rx_causes(trans);
1221
1222 iwl_pcie_map_non_rx_causes(trans);
1223}
1224
1225static void iwl_pcie_init_msix(struct iwl_trans_pcie *trans_pcie)
1226{
1227 struct iwl_trans *trans = trans_pcie->trans;
1228
1229 iwl_pcie_conf_msix_hw(trans_pcie);
1230
1231 if (!trans_pcie->msix_enabled)
1232 return;
1233
1234 trans_pcie->fh_init_mask = ~iwl_read32(trans, CSR_MSIX_FH_INT_MASK_AD);
1235 trans_pcie->fh_mask = trans_pcie->fh_init_mask;
1236 trans_pcie->hw_init_mask = ~iwl_read32(trans, CSR_MSIX_HW_INT_MASK_AD);
1237 trans_pcie->hw_mask = trans_pcie->hw_init_mask;
1238}
1239
1240static void _iwl_trans_pcie_stop_device(struct iwl_trans *trans, bool from_irq)
1241{
1242 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1243
1244 lockdep_assert_held(&trans_pcie->mutex);
1245
1246 if (trans_pcie->is_down)
1247 return;
1248
1249 trans_pcie->is_down = true;
1250
1251 /* tell the device to stop sending interrupts */
1252 iwl_disable_interrupts(trans);
1253
1254 /* device going down, Stop using ICT table */
1255 iwl_pcie_disable_ict(trans);
1256
1257 /*
1258 * If a HW restart happens during firmware loading,
1259 * then the firmware loading might call this function
1260 * and later it might be called again due to the
1261 * restart. So don't process again if the device is
1262 * already dead.
1263 */
1264 if (test_and_clear_bit(STATUS_DEVICE_ENABLED, &trans->status)) {
1265 IWL_DEBUG_INFO(trans,
1266 "DEVICE_ENABLED bit was set and is now cleared\n");
1267 if (!from_irq)
1268 iwl_pcie_synchronize_irqs(trans);
1269 iwl_pcie_rx_napi_sync(trans);
1270 iwl_pcie_tx_stop(trans);
1271 iwl_pcie_rx_stop(trans);
1272
1273 /* Power-down device's busmaster DMA clocks */
1274 if (!trans->cfg->apmg_not_supported) {
1275 iwl_write_prph(trans, APMG_CLK_DIS_REG,
1276 APMG_CLK_VAL_DMA_CLK_RQT);
1277 udelay(5);
1278 }
1279 }
1280
1281 /* Make sure (redundant) we've released our request to stay awake */
1282 if (trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_BZ)
1283 iwl_clear_bit(trans, CSR_GP_CNTRL,
1284 CSR_GP_CNTRL_REG_FLAG_BZ_MAC_ACCESS_REQ);
1285 else
1286 iwl_clear_bit(trans, CSR_GP_CNTRL,
1287 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
1288
1289 /* Stop the device, and put it in low power state */
1290 iwl_pcie_apm_stop(trans, false);
1291
1292 /* re-take ownership to prevent other users from stealing the device */
1293 iwl_trans_pcie_sw_reset(trans, true);
1294
1295 /*
1296 * Upon stop, the IVAR table gets erased, so msi-x won't
1297 * work. This causes a bug in RF-KILL flows, since the interrupt
1298 * that enables radio won't fire on the correct irq, and the
1299 * driver won't be able to handle the interrupt.
1300 * Configure the IVAR table again after reset.
1301 */
1302 iwl_pcie_conf_msix_hw(trans_pcie);
1303
1304 /*
1305 * Upon stop, the APM issues an interrupt if HW RF kill is set.
1306 * This is a bug in certain verions of the hardware.
1307 * Certain devices also keep sending HW RF kill interrupt all
1308 * the time, unless the interrupt is ACKed even if the interrupt
1309 * should be masked. Re-ACK all the interrupts here.
1310 */
1311 iwl_disable_interrupts(trans);
1312
1313 /* clear all status bits */
1314 clear_bit(STATUS_SYNC_HCMD_ACTIVE, &trans->status);
1315 clear_bit(STATUS_INT_ENABLED, &trans->status);
1316 clear_bit(STATUS_TPOWER_PMI, &trans->status);
1317
1318 /*
1319 * Even if we stop the HW, we still want the RF kill
1320 * interrupt
1321 */
1322 iwl_enable_rfkill_int(trans);
1323}
1324
1325void iwl_pcie_synchronize_irqs(struct iwl_trans *trans)
1326{
1327 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1328
1329 if (trans_pcie->msix_enabled) {
1330 int i;
1331
1332 for (i = 0; i < trans_pcie->alloc_vecs; i++)
1333 synchronize_irq(trans_pcie->msix_entries[i].vector);
1334 } else {
1335 synchronize_irq(trans_pcie->pci_dev->irq);
1336 }
1337}
1338
1339static int iwl_trans_pcie_start_fw(struct iwl_trans *trans,
1340 const struct fw_img *fw, bool run_in_rfkill)
1341{
1342 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1343 bool hw_rfkill;
1344 int ret;
1345
1346 /* This may fail if AMT took ownership of the device */
1347 if (iwl_pcie_prepare_card_hw(trans)) {
1348 IWL_WARN(trans, "Exit HW not ready\n");
1349 return -EIO;
1350 }
1351
1352 iwl_enable_rfkill_int(trans);
1353
1354 iwl_write32(trans, CSR_INT, 0xFFFFFFFF);
1355
1356 /*
1357 * We enabled the RF-Kill interrupt and the handler may very
1358 * well be running. Disable the interrupts to make sure no other
1359 * interrupt can be fired.
1360 */
1361 iwl_disable_interrupts(trans);
1362
1363 /* Make sure it finished running */
1364 iwl_pcie_synchronize_irqs(trans);
1365
1366 mutex_lock(&trans_pcie->mutex);
1367
1368 /* If platform's RF_KILL switch is NOT set to KILL */
1369 hw_rfkill = iwl_pcie_check_hw_rf_kill(trans);
1370 if (hw_rfkill && !run_in_rfkill) {
1371 ret = -ERFKILL;
1372 goto out;
1373 }
1374
1375 /* Someone called stop_device, don't try to start_fw */
1376 if (trans_pcie->is_down) {
1377 IWL_WARN(trans,
1378 "Can't start_fw since the HW hasn't been started\n");
1379 ret = -EIO;
1380 goto out;
1381 }
1382
1383 /* make sure rfkill handshake bits are cleared */
1384 iwl_write32(trans, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1385 iwl_write32(trans, CSR_UCODE_DRV_GP1_CLR,
1386 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
1387
1388 /* clear (again), then enable host interrupts */
1389 iwl_write32(trans, CSR_INT, 0xFFFFFFFF);
1390
1391 ret = iwl_pcie_nic_init(trans);
1392 if (ret) {
1393 IWL_ERR(trans, "Unable to init nic\n");
1394 goto out;
1395 }
1396
1397 /*
1398 * Now, we load the firmware and don't want to be interrupted, even
1399 * by the RF-Kill interrupt (hence mask all the interrupt besides the
1400 * FH_TX interrupt which is needed to load the firmware). If the
1401 * RF-Kill switch is toggled, we will find out after having loaded
1402 * the firmware and return the proper value to the caller.
1403 */
1404 iwl_enable_fw_load_int(trans);
1405
1406 /* really make sure rfkill handshake bits are cleared */
1407 iwl_write32(trans, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1408 iwl_write32(trans, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1409
1410 /* Load the given image to the HW */
1411 if (trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_8000)
1412 ret = iwl_pcie_load_given_ucode_8000(trans, fw);
1413 else
1414 ret = iwl_pcie_load_given_ucode(trans, fw);
1415
1416 /* re-check RF-Kill state since we may have missed the interrupt */
1417 hw_rfkill = iwl_pcie_check_hw_rf_kill(trans);
1418 if (hw_rfkill && !run_in_rfkill)
1419 ret = -ERFKILL;
1420
1421out:
1422 mutex_unlock(&trans_pcie->mutex);
1423 return ret;
1424}
1425
1426static void iwl_trans_pcie_fw_alive(struct iwl_trans *trans, u32 scd_addr)
1427{
1428 iwl_pcie_reset_ict(trans);
1429 iwl_pcie_tx_start(trans, scd_addr);
1430}
1431
1432void iwl_trans_pcie_handle_stop_rfkill(struct iwl_trans *trans,
1433 bool was_in_rfkill)
1434{
1435 bool hw_rfkill;
1436
1437 /*
1438 * Check again since the RF kill state may have changed while
1439 * all the interrupts were disabled, in this case we couldn't
1440 * receive the RF kill interrupt and update the state in the
1441 * op_mode.
1442 * Don't call the op_mode if the rkfill state hasn't changed.
1443 * This allows the op_mode to call stop_device from the rfkill
1444 * notification without endless recursion. Under very rare
1445 * circumstances, we might have a small recursion if the rfkill
1446 * state changed exactly now while we were called from stop_device.
1447 * This is very unlikely but can happen and is supported.
1448 */
1449 hw_rfkill = iwl_is_rfkill_set(trans);
1450 if (hw_rfkill) {
1451 set_bit(STATUS_RFKILL_HW, &trans->status);
1452 set_bit(STATUS_RFKILL_OPMODE, &trans->status);
1453 } else {
1454 clear_bit(STATUS_RFKILL_HW, &trans->status);
1455 clear_bit(STATUS_RFKILL_OPMODE, &trans->status);
1456 }
1457 if (hw_rfkill != was_in_rfkill)
1458 iwl_trans_pcie_rf_kill(trans, hw_rfkill, false);
1459}
1460
1461static void iwl_trans_pcie_stop_device(struct iwl_trans *trans)
1462{
1463 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1464 bool was_in_rfkill;
1465
1466 iwl_op_mode_time_point(trans->op_mode,
1467 IWL_FW_INI_TIME_POINT_HOST_DEVICE_DISABLE,
1468 NULL);
1469
1470 mutex_lock(&trans_pcie->mutex);
1471 trans_pcie->opmode_down = true;
1472 was_in_rfkill = test_bit(STATUS_RFKILL_OPMODE, &trans->status);
1473 _iwl_trans_pcie_stop_device(trans, false);
1474 iwl_trans_pcie_handle_stop_rfkill(trans, was_in_rfkill);
1475 mutex_unlock(&trans_pcie->mutex);
1476}
1477
1478void iwl_trans_pcie_rf_kill(struct iwl_trans *trans, bool state, bool from_irq)
1479{
1480 struct iwl_trans_pcie __maybe_unused *trans_pcie =
1481 IWL_TRANS_GET_PCIE_TRANS(trans);
1482
1483 lockdep_assert_held(&trans_pcie->mutex);
1484
1485 IWL_WARN(trans, "reporting RF_KILL (radio %s)\n",
1486 state ? "disabled" : "enabled");
1487 if (iwl_op_mode_hw_rf_kill(trans->op_mode, state)) {
1488 if (trans->trans_cfg->gen2)
1489 _iwl_trans_pcie_gen2_stop_device(trans);
1490 else
1491 _iwl_trans_pcie_stop_device(trans, from_irq);
1492 }
1493}
1494
1495void iwl_pcie_d3_complete_suspend(struct iwl_trans *trans,
1496 bool test, bool reset)
1497{
1498 iwl_disable_interrupts(trans);
1499
1500 /*
1501 * in testing mode, the host stays awake and the
1502 * hardware won't be reset (not even partially)
1503 */
1504 if (test)
1505 return;
1506
1507 iwl_pcie_disable_ict(trans);
1508
1509 iwl_pcie_synchronize_irqs(trans);
1510
1511 iwl_clear_bit(trans, CSR_GP_CNTRL,
1512 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
1513 iwl_clear_bit(trans, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1514
1515 if (reset) {
1516 /*
1517 * reset TX queues -- some of their registers reset during S3
1518 * so if we don't reset everything here the D3 image would try
1519 * to execute some invalid memory upon resume
1520 */
1521 iwl_trans_pcie_tx_reset(trans);
1522 }
1523
1524 iwl_pcie_set_pwr(trans, true);
1525}
1526
1527static int iwl_pcie_d3_handshake(struct iwl_trans *trans, bool suspend)
1528{
1529 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1530 int ret;
1531
1532 if (trans->trans_cfg->device_family == IWL_DEVICE_FAMILY_AX210)
1533 iwl_write_umac_prph(trans, UREG_DOORBELL_TO_ISR6,
1534 suspend ? UREG_DOORBELL_TO_ISR6_SUSPEND :
1535 UREG_DOORBELL_TO_ISR6_RESUME);
1536 else if (trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_BZ)
1537 iwl_write32(trans, CSR_IPC_SLEEP_CONTROL,
1538 suspend ? CSR_IPC_SLEEP_CONTROL_SUSPEND :
1539 CSR_IPC_SLEEP_CONTROL_RESUME);
1540 else
1541 return 0;
1542
1543 ret = wait_event_timeout(trans_pcie->sx_waitq,
1544 trans_pcie->sx_complete, 2 * HZ);
1545
1546 /* Invalidate it toward next suspend or resume */
1547 trans_pcie->sx_complete = false;
1548
1549 if (!ret) {
1550 IWL_ERR(trans, "Timeout %s D3\n",
1551 suspend ? "entering" : "exiting");
1552 return -ETIMEDOUT;
1553 }
1554
1555 return 0;
1556}
1557
1558static int iwl_trans_pcie_d3_suspend(struct iwl_trans *trans, bool test,
1559 bool reset)
1560{
1561 int ret;
1562
1563 if (!reset)
1564 /* Enable persistence mode to avoid reset */
1565 iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG,
1566 CSR_HW_IF_CONFIG_REG_PERSIST_MODE);
1567
1568 ret = iwl_pcie_d3_handshake(trans, true);
1569 if (ret)
1570 return ret;
1571
1572 iwl_pcie_d3_complete_suspend(trans, test, reset);
1573
1574 return 0;
1575}
1576
1577static int iwl_trans_pcie_d3_resume(struct iwl_trans *trans,
1578 enum iwl_d3_status *status,
1579 bool test, bool reset)
1580{
1581 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1582 u32 val;
1583 int ret;
1584
1585 if (test) {
1586 iwl_enable_interrupts(trans);
1587 *status = IWL_D3_STATUS_ALIVE;
1588 ret = 0;
1589 goto out;
1590 }
1591
1592 iwl_set_bit(trans, CSR_GP_CNTRL,
1593 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
1594
1595 ret = iwl_finish_nic_init(trans);
1596 if (ret)
1597 return ret;
1598
1599 /*
1600 * Reconfigure IVAR table in case of MSIX or reset ict table in
1601 * MSI mode since HW reset erased it.
1602 * Also enables interrupts - none will happen as
1603 * the device doesn't know we're waking it up, only when
1604 * the opmode actually tells it after this call.
1605 */
1606 iwl_pcie_conf_msix_hw(trans_pcie);
1607 if (!trans_pcie->msix_enabled)
1608 iwl_pcie_reset_ict(trans);
1609 iwl_enable_interrupts(trans);
1610
1611 iwl_pcie_set_pwr(trans, false);
1612
1613 if (!reset) {
1614 iwl_clear_bit(trans, CSR_GP_CNTRL,
1615 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
1616 } else {
1617 iwl_trans_pcie_tx_reset(trans);
1618
1619 ret = iwl_pcie_rx_init(trans);
1620 if (ret) {
1621 IWL_ERR(trans,
1622 "Failed to resume the device (RX reset)\n");
1623 return ret;
1624 }
1625 }
1626
1627 IWL_DEBUG_POWER(trans, "WFPM value upon resume = 0x%08X\n",
1628 iwl_read_umac_prph(trans, WFPM_GP2));
1629
1630 val = iwl_read32(trans, CSR_RESET);
1631 if (val & CSR_RESET_REG_FLAG_NEVO_RESET)
1632 *status = IWL_D3_STATUS_RESET;
1633 else
1634 *status = IWL_D3_STATUS_ALIVE;
1635
1636out:
1637 if (*status == IWL_D3_STATUS_ALIVE)
1638 ret = iwl_pcie_d3_handshake(trans, false);
1639
1640 return ret;
1641}
1642
1643static void
1644iwl_pcie_set_interrupt_capa(struct pci_dev *pdev,
1645 struct iwl_trans *trans,
1646 const struct iwl_cfg_trans_params *cfg_trans)
1647{
1648 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1649 int max_irqs, num_irqs, i, ret;
1650 u16 pci_cmd;
1651 u32 max_rx_queues = IWL_MAX_RX_HW_QUEUES;
1652
1653 if (!cfg_trans->mq_rx_supported)
1654 goto enable_msi;
1655
1656 if (cfg_trans->device_family <= IWL_DEVICE_FAMILY_9000)
1657 max_rx_queues = IWL_9000_MAX_RX_HW_QUEUES;
1658
1659 max_irqs = min_t(u32, num_online_cpus() + 2, max_rx_queues);
1660 for (i = 0; i < max_irqs; i++)
1661 trans_pcie->msix_entries[i].entry = i;
1662
1663 num_irqs = pci_enable_msix_range(pdev, trans_pcie->msix_entries,
1664 MSIX_MIN_INTERRUPT_VECTORS,
1665 max_irqs);
1666 if (num_irqs < 0) {
1667 IWL_DEBUG_INFO(trans,
1668 "Failed to enable msi-x mode (ret %d). Moving to msi mode.\n",
1669 num_irqs);
1670 goto enable_msi;
1671 }
1672 trans_pcie->def_irq = (num_irqs == max_irqs) ? num_irqs - 1 : 0;
1673
1674 IWL_DEBUG_INFO(trans,
1675 "MSI-X enabled. %d interrupt vectors were allocated\n",
1676 num_irqs);
1677
1678 /*
1679 * In case the OS provides fewer interrupts than requested, different
1680 * causes will share the same interrupt vector as follows:
1681 * One interrupt less: non rx causes shared with FBQ.
1682 * Two interrupts less: non rx causes shared with FBQ and RSS.
1683 * More than two interrupts: we will use fewer RSS queues.
1684 */
1685 if (num_irqs <= max_irqs - 2) {
1686 trans_pcie->trans->num_rx_queues = num_irqs + 1;
1687 trans_pcie->shared_vec_mask = IWL_SHARED_IRQ_NON_RX |
1688 IWL_SHARED_IRQ_FIRST_RSS;
1689 } else if (num_irqs == max_irqs - 1) {
1690 trans_pcie->trans->num_rx_queues = num_irqs;
1691 trans_pcie->shared_vec_mask = IWL_SHARED_IRQ_NON_RX;
1692 } else {
1693 trans_pcie->trans->num_rx_queues = num_irqs - 1;
1694 }
1695
1696 IWL_DEBUG_INFO(trans,
1697 "MSI-X enabled with rx queues %d, vec mask 0x%x\n",
1698 trans_pcie->trans->num_rx_queues, trans_pcie->shared_vec_mask);
1699
1700 WARN_ON(trans_pcie->trans->num_rx_queues > IWL_MAX_RX_HW_QUEUES);
1701
1702 trans_pcie->alloc_vecs = num_irqs;
1703 trans_pcie->msix_enabled = true;
1704 return;
1705
1706enable_msi:
1707 ret = pci_enable_msi(pdev);
1708 if (ret) {
1709 dev_err(&pdev->dev, "pci_enable_msi failed - %d\n", ret);
1710 /* enable rfkill interrupt: hw bug w/a */
1711 pci_read_config_word(pdev, PCI_COMMAND, &pci_cmd);
1712 if (pci_cmd & PCI_COMMAND_INTX_DISABLE) {
1713 pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
1714 pci_write_config_word(pdev, PCI_COMMAND, pci_cmd);
1715 }
1716 }
1717}
1718
1719static void iwl_pcie_irq_set_affinity(struct iwl_trans *trans)
1720{
1721 int iter_rx_q, i, ret, cpu, offset;
1722 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1723
1724 i = trans_pcie->shared_vec_mask & IWL_SHARED_IRQ_FIRST_RSS ? 0 : 1;
1725 iter_rx_q = trans_pcie->trans->num_rx_queues - 1 + i;
1726 offset = 1 + i;
1727 for (; i < iter_rx_q ; i++) {
1728 /*
1729 * Get the cpu prior to the place to search
1730 * (i.e. return will be > i - 1).
1731 */
1732 cpu = cpumask_next(i - offset, cpu_online_mask);
1733 cpumask_set_cpu(cpu, &trans_pcie->affinity_mask[i]);
1734 ret = irq_set_affinity_hint(trans_pcie->msix_entries[i].vector,
1735 &trans_pcie->affinity_mask[i]);
1736 if (ret)
1737 IWL_ERR(trans_pcie->trans,
1738 "Failed to set affinity mask for IRQ %d\n",
1739 trans_pcie->msix_entries[i].vector);
1740 }
1741}
1742
1743static int iwl_pcie_init_msix_handler(struct pci_dev *pdev,
1744 struct iwl_trans_pcie *trans_pcie)
1745{
1746 int i;
1747
1748 for (i = 0; i < trans_pcie->alloc_vecs; i++) {
1749 int ret;
1750 struct msix_entry *msix_entry;
1751 const char *qname = queue_name(&pdev->dev, trans_pcie, i);
1752
1753 if (!qname)
1754 return -ENOMEM;
1755
1756 msix_entry = &trans_pcie->msix_entries[i];
1757 ret = devm_request_threaded_irq(&pdev->dev,
1758 msix_entry->vector,
1759 iwl_pcie_msix_isr,
1760 (i == trans_pcie->def_irq) ?
1761 iwl_pcie_irq_msix_handler :
1762 iwl_pcie_irq_rx_msix_handler,
1763 IRQF_SHARED,
1764 qname,
1765 msix_entry);
1766 if (ret) {
1767 IWL_ERR(trans_pcie->trans,
1768 "Error allocating IRQ %d\n", i);
1769
1770 return ret;
1771 }
1772 }
1773 iwl_pcie_irq_set_affinity(trans_pcie->trans);
1774
1775 return 0;
1776}
1777
1778static int iwl_trans_pcie_clear_persistence_bit(struct iwl_trans *trans)
1779{
1780 u32 hpm, wprot;
1781
1782 switch (trans->trans_cfg->device_family) {
1783 case IWL_DEVICE_FAMILY_9000:
1784 wprot = PREG_PRPH_WPROT_9000;
1785 break;
1786 case IWL_DEVICE_FAMILY_22000:
1787 wprot = PREG_PRPH_WPROT_22000;
1788 break;
1789 default:
1790 return 0;
1791 }
1792
1793 hpm = iwl_read_umac_prph_no_grab(trans, HPM_DEBUG);
1794 if (!iwl_trans_is_hw_error_value(hpm) && (hpm & PERSISTENCE_BIT)) {
1795 u32 wprot_val = iwl_read_umac_prph_no_grab(trans, wprot);
1796
1797 if (wprot_val & PREG_WFPM_ACCESS) {
1798 IWL_ERR(trans,
1799 "Error, can not clear persistence bit\n");
1800 return -EPERM;
1801 }
1802 iwl_write_umac_prph_no_grab(trans, HPM_DEBUG,
1803 hpm & ~PERSISTENCE_BIT);
1804 }
1805
1806 return 0;
1807}
1808
1809static int iwl_pcie_gen2_force_power_gating(struct iwl_trans *trans)
1810{
1811 int ret;
1812
1813 ret = iwl_finish_nic_init(trans);
1814 if (ret < 0)
1815 return ret;
1816
1817 iwl_set_bits_prph(trans, HPM_HIPM_GEN_CFG,
1818 HPM_HIPM_GEN_CFG_CR_FORCE_ACTIVE);
1819 udelay(20);
1820 iwl_set_bits_prph(trans, HPM_HIPM_GEN_CFG,
1821 HPM_HIPM_GEN_CFG_CR_PG_EN |
1822 HPM_HIPM_GEN_CFG_CR_SLP_EN);
1823 udelay(20);
1824 iwl_clear_bits_prph(trans, HPM_HIPM_GEN_CFG,
1825 HPM_HIPM_GEN_CFG_CR_FORCE_ACTIVE);
1826
1827 return iwl_trans_pcie_sw_reset(trans, true);
1828}
1829
1830static int _iwl_trans_pcie_start_hw(struct iwl_trans *trans)
1831{
1832 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1833 int err;
1834
1835 lockdep_assert_held(&trans_pcie->mutex);
1836
1837 err = iwl_pcie_prepare_card_hw(trans);
1838 if (err) {
1839 IWL_ERR(trans, "Error while preparing HW: %d\n", err);
1840 return err;
1841 }
1842
1843 err = iwl_trans_pcie_clear_persistence_bit(trans);
1844 if (err)
1845 return err;
1846
1847 err = iwl_trans_pcie_sw_reset(trans, true);
1848 if (err)
1849 return err;
1850
1851 if (trans->trans_cfg->device_family == IWL_DEVICE_FAMILY_22000 &&
1852 trans->trans_cfg->integrated) {
1853 err = iwl_pcie_gen2_force_power_gating(trans);
1854 if (err)
1855 return err;
1856 }
1857
1858 err = iwl_pcie_apm_init(trans);
1859 if (err)
1860 return err;
1861
1862 iwl_pcie_init_msix(trans_pcie);
1863
1864 /* From now on, the op_mode will be kept updated about RF kill state */
1865 iwl_enable_rfkill_int(trans);
1866
1867 trans_pcie->opmode_down = false;
1868
1869 /* Set is_down to false here so that...*/
1870 trans_pcie->is_down = false;
1871
1872 /* ...rfkill can call stop_device and set it false if needed */
1873 iwl_pcie_check_hw_rf_kill(trans);
1874
1875 return 0;
1876}
1877
1878static int iwl_trans_pcie_start_hw(struct iwl_trans *trans)
1879{
1880 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1881 int ret;
1882
1883 mutex_lock(&trans_pcie->mutex);
1884 ret = _iwl_trans_pcie_start_hw(trans);
1885 mutex_unlock(&trans_pcie->mutex);
1886
1887 return ret;
1888}
1889
1890static void iwl_trans_pcie_op_mode_leave(struct iwl_trans *trans)
1891{
1892 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1893
1894 mutex_lock(&trans_pcie->mutex);
1895
1896 /* disable interrupts - don't enable HW RF kill interrupt */
1897 iwl_disable_interrupts(trans);
1898
1899 iwl_pcie_apm_stop(trans, true);
1900
1901 iwl_disable_interrupts(trans);
1902
1903 iwl_pcie_disable_ict(trans);
1904
1905 mutex_unlock(&trans_pcie->mutex);
1906
1907 iwl_pcie_synchronize_irqs(trans);
1908}
1909
1910static void iwl_trans_pcie_write8(struct iwl_trans *trans, u32 ofs, u8 val)
1911{
1912 writeb(val, IWL_TRANS_GET_PCIE_TRANS(trans)->hw_base + ofs);
1913}
1914
1915static void iwl_trans_pcie_write32(struct iwl_trans *trans, u32 ofs, u32 val)
1916{
1917 writel(val, IWL_TRANS_GET_PCIE_TRANS(trans)->hw_base + ofs);
1918}
1919
1920static u32 iwl_trans_pcie_read32(struct iwl_trans *trans, u32 ofs)
1921{
1922 return readl(IWL_TRANS_GET_PCIE_TRANS(trans)->hw_base + ofs);
1923}
1924
1925static u32 iwl_trans_pcie_prph_msk(struct iwl_trans *trans)
1926{
1927 if (trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_AX210)
1928 return 0x00FFFFFF;
1929 else
1930 return 0x000FFFFF;
1931}
1932
1933static u32 iwl_trans_pcie_read_prph(struct iwl_trans *trans, u32 reg)
1934{
1935 u32 mask = iwl_trans_pcie_prph_msk(trans);
1936
1937 iwl_trans_pcie_write32(trans, HBUS_TARG_PRPH_RADDR,
1938 ((reg & mask) | (3 << 24)));
1939 return iwl_trans_pcie_read32(trans, HBUS_TARG_PRPH_RDAT);
1940}
1941
1942static void iwl_trans_pcie_write_prph(struct iwl_trans *trans, u32 addr,
1943 u32 val)
1944{
1945 u32 mask = iwl_trans_pcie_prph_msk(trans);
1946
1947 iwl_trans_pcie_write32(trans, HBUS_TARG_PRPH_WADDR,
1948 ((addr & mask) | (3 << 24)));
1949 iwl_trans_pcie_write32(trans, HBUS_TARG_PRPH_WDAT, val);
1950}
1951
1952static void iwl_trans_pcie_configure(struct iwl_trans *trans,
1953 const struct iwl_trans_config *trans_cfg)
1954{
1955 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1956
1957 /* free all first - we might be reconfigured for a different size */
1958 iwl_pcie_free_rbs_pool(trans);
1959
1960 trans->txqs.cmd.q_id = trans_cfg->cmd_queue;
1961 trans->txqs.cmd.fifo = trans_cfg->cmd_fifo;
1962 trans->txqs.cmd.wdg_timeout = trans_cfg->cmd_q_wdg_timeout;
1963 trans->txqs.page_offs = trans_cfg->cb_data_offs;
1964 trans->txqs.dev_cmd_offs = trans_cfg->cb_data_offs + sizeof(void *);
1965 trans->txqs.queue_alloc_cmd_ver = trans_cfg->queue_alloc_cmd_ver;
1966
1967 if (WARN_ON(trans_cfg->n_no_reclaim_cmds > MAX_NO_RECLAIM_CMDS))
1968 trans_pcie->n_no_reclaim_cmds = 0;
1969 else
1970 trans_pcie->n_no_reclaim_cmds = trans_cfg->n_no_reclaim_cmds;
1971 if (trans_pcie->n_no_reclaim_cmds)
1972 memcpy(trans_pcie->no_reclaim_cmds, trans_cfg->no_reclaim_cmds,
1973 trans_pcie->n_no_reclaim_cmds * sizeof(u8));
1974
1975 trans_pcie->rx_buf_size = trans_cfg->rx_buf_size;
1976 trans_pcie->rx_page_order =
1977 iwl_trans_get_rb_size_order(trans_pcie->rx_buf_size);
1978 trans_pcie->rx_buf_bytes =
1979 iwl_trans_get_rb_size(trans_pcie->rx_buf_size);
1980 trans_pcie->supported_dma_mask = DMA_BIT_MASK(12);
1981 if (trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_AX210)
1982 trans_pcie->supported_dma_mask = DMA_BIT_MASK(11);
1983
1984 trans->txqs.bc_table_dword = trans_cfg->bc_table_dword;
1985 trans_pcie->scd_set_active = trans_cfg->scd_set_active;
1986
1987 trans->command_groups = trans_cfg->command_groups;
1988 trans->command_groups_size = trans_cfg->command_groups_size;
1989
1990 /* Initialize NAPI here - it should be before registering to mac80211
1991 * in the opmode but after the HW struct is allocated.
1992 * As this function may be called again in some corner cases don't
1993 * do anything if NAPI was already initialized.
1994 */
1995 if (trans_pcie->napi_dev.reg_state != NETREG_DUMMY)
1996 init_dummy_netdev(&trans_pcie->napi_dev);
1997
1998 trans_pcie->fw_reset_handshake = trans_cfg->fw_reset_handshake;
1999}
2000
2001void iwl_trans_pcie_free_pnvm_dram_regions(struct iwl_dram_regions *dram_regions,
2002 struct device *dev)
2003{
2004 u8 i;
2005 struct iwl_dram_data *desc_dram = &dram_regions->prph_scratch_mem_desc;
2006
2007 /* free DRAM payloads */
2008 for (i = 0; i < dram_regions->n_regions; i++) {
2009 dma_free_coherent(dev, dram_regions->drams[i].size,
2010 dram_regions->drams[i].block,
2011 dram_regions->drams[i].physical);
2012 }
2013 dram_regions->n_regions = 0;
2014
2015 /* free DRAM addresses array */
2016 if (desc_dram->block) {
2017 dma_free_coherent(dev, desc_dram->size,
2018 desc_dram->block,
2019 desc_dram->physical);
2020 }
2021 memset(desc_dram, 0, sizeof(*desc_dram));
2022}
2023
2024static void iwl_pcie_free_invalid_tx_cmd(struct iwl_trans *trans)
2025{
2026 iwl_pcie_free_dma_ptr(trans, &trans->invalid_tx_cmd);
2027}
2028
2029static int iwl_pcie_alloc_invalid_tx_cmd(struct iwl_trans *trans)
2030{
2031 struct iwl_cmd_header_wide bad_cmd = {
2032 .cmd = INVALID_WR_PTR_CMD,
2033 .group_id = DEBUG_GROUP,
2034 .sequence = cpu_to_le16(0xffff),
2035 .length = cpu_to_le16(0),
2036 .version = 0,
2037 };
2038 int ret;
2039
2040 ret = iwl_pcie_alloc_dma_ptr(trans, &trans->invalid_tx_cmd,
2041 sizeof(bad_cmd));
2042 if (ret)
2043 return ret;
2044 memcpy(trans->invalid_tx_cmd.addr, &bad_cmd, sizeof(bad_cmd));
2045 return 0;
2046}
2047
2048void iwl_trans_pcie_free(struct iwl_trans *trans)
2049{
2050 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2051 int i;
2052
2053 iwl_pcie_synchronize_irqs(trans);
2054
2055 if (trans->trans_cfg->gen2)
2056 iwl_txq_gen2_tx_free(trans);
2057 else
2058 iwl_pcie_tx_free(trans);
2059 iwl_pcie_rx_free(trans);
2060
2061 if (trans_pcie->rba.alloc_wq) {
2062 destroy_workqueue(trans_pcie->rba.alloc_wq);
2063 trans_pcie->rba.alloc_wq = NULL;
2064 }
2065
2066 if (trans_pcie->msix_enabled) {
2067 for (i = 0; i < trans_pcie->alloc_vecs; i++) {
2068 irq_set_affinity_hint(
2069 trans_pcie->msix_entries[i].vector,
2070 NULL);
2071 }
2072
2073 trans_pcie->msix_enabled = false;
2074 } else {
2075 iwl_pcie_free_ict(trans);
2076 }
2077
2078 iwl_pcie_free_invalid_tx_cmd(trans);
2079
2080 iwl_pcie_free_fw_monitor(trans);
2081
2082 iwl_trans_pcie_free_pnvm_dram_regions(&trans_pcie->pnvm_data,
2083 trans->dev);
2084 iwl_trans_pcie_free_pnvm_dram_regions(&trans_pcie->reduced_tables_data,
2085 trans->dev);
2086
2087 mutex_destroy(&trans_pcie->mutex);
2088 iwl_trans_free(trans);
2089}
2090
2091static void iwl_trans_pcie_set_pmi(struct iwl_trans *trans, bool state)
2092{
2093 if (state)
2094 set_bit(STATUS_TPOWER_PMI, &trans->status);
2095 else
2096 clear_bit(STATUS_TPOWER_PMI, &trans->status);
2097}
2098
2099struct iwl_trans_pcie_removal {
2100 struct pci_dev *pdev;
2101 struct work_struct work;
2102 bool rescan;
2103};
2104
2105static void iwl_trans_pcie_removal_wk(struct work_struct *wk)
2106{
2107 struct iwl_trans_pcie_removal *removal =
2108 container_of(wk, struct iwl_trans_pcie_removal, work);
2109 struct pci_dev *pdev = removal->pdev;
2110 static char *prop[] = {"EVENT=INACCESSIBLE", NULL};
2111 struct pci_bus *bus;
2112
2113 pci_lock_rescan_remove();
2114
2115 bus = pdev->bus;
2116 /* in this case, something else already removed the device */
2117 if (!bus)
2118 goto out;
2119
2120 dev_err(&pdev->dev, "Device gone - attempting removal\n");
2121
2122 kobject_uevent_env(&pdev->dev.kobj, KOBJ_CHANGE, prop);
2123
2124 pci_stop_and_remove_bus_device(pdev);
2125 pci_dev_put(pdev);
2126
2127 if (removal->rescan) {
2128 if (bus->parent)
2129 bus = bus->parent;
2130 pci_rescan_bus(bus);
2131 }
2132
2133out:
2134 pci_unlock_rescan_remove();
2135
2136 kfree(removal);
2137 module_put(THIS_MODULE);
2138}
2139
2140void iwl_trans_pcie_remove(struct iwl_trans *trans, bool rescan)
2141{
2142 struct iwl_trans_pcie_removal *removal;
2143
2144 if (test_bit(STATUS_TRANS_DEAD, &trans->status))
2145 return;
2146
2147 IWL_ERR(trans, "Device gone - scheduling removal!\n");
2148 iwl_pcie_dump_csr(trans);
2149
2150 /*
2151 * get a module reference to avoid doing this
2152 * while unloading anyway and to avoid
2153 * scheduling a work with code that's being
2154 * removed.
2155 */
2156 if (!try_module_get(THIS_MODULE)) {
2157 IWL_ERR(trans,
2158 "Module is being unloaded - abort\n");
2159 return;
2160 }
2161
2162 removal = kzalloc(sizeof(*removal), GFP_ATOMIC);
2163 if (!removal) {
2164 module_put(THIS_MODULE);
2165 return;
2166 }
2167 /*
2168 * we don't need to clear this flag, because
2169 * the trans will be freed and reallocated.
2170 */
2171 set_bit(STATUS_TRANS_DEAD, &trans->status);
2172
2173 removal->pdev = to_pci_dev(trans->dev);
2174 removal->rescan = rescan;
2175 INIT_WORK(&removal->work, iwl_trans_pcie_removal_wk);
2176 pci_dev_get(removal->pdev);
2177 schedule_work(&removal->work);
2178}
2179EXPORT_SYMBOL(iwl_trans_pcie_remove);
2180
2181/*
2182 * This version doesn't disable BHs but rather assumes they're
2183 * already disabled.
2184 */
2185bool __iwl_trans_pcie_grab_nic_access(struct iwl_trans *trans)
2186{
2187 int ret;
2188 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2189 u32 write = CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ;
2190 u32 mask = CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY |
2191 CSR_GP_CNTRL_REG_FLAG_GOING_TO_SLEEP;
2192 u32 poll = CSR_GP_CNTRL_REG_VAL_MAC_ACCESS_EN;
2193
2194 if (test_bit(STATUS_TRANS_DEAD, &trans->status))
2195 return false;
2196
2197 spin_lock(&trans_pcie->reg_lock);
2198
2199 if (trans_pcie->cmd_hold_nic_awake)
2200 goto out;
2201
2202 if (trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_BZ) {
2203 write = CSR_GP_CNTRL_REG_FLAG_BZ_MAC_ACCESS_REQ;
2204 mask = CSR_GP_CNTRL_REG_FLAG_MAC_STATUS;
2205 poll = CSR_GP_CNTRL_REG_FLAG_MAC_STATUS;
2206 }
2207
2208 /* this bit wakes up the NIC */
2209 __iwl_trans_pcie_set_bit(trans, CSR_GP_CNTRL, write);
2210 if (trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_8000)
2211 udelay(2);
2212
2213 /*
2214 * These bits say the device is running, and should keep running for
2215 * at least a short while (at least as long as MAC_ACCESS_REQ stays 1),
2216 * but they do not indicate that embedded SRAM is restored yet;
2217 * HW with volatile SRAM must save/restore contents to/from
2218 * host DRAM when sleeping/waking for power-saving.
2219 * Each direction takes approximately 1/4 millisecond; with this
2220 * overhead, it's a good idea to grab and hold MAC_ACCESS_REQUEST if a
2221 * series of register accesses are expected (e.g. reading Event Log),
2222 * to keep device from sleeping.
2223 *
2224 * CSR_UCODE_DRV_GP1 register bit MAC_SLEEP == 0 indicates that
2225 * SRAM is okay/restored. We don't check that here because this call
2226 * is just for hardware register access; but GP1 MAC_SLEEP
2227 * check is a good idea before accessing the SRAM of HW with
2228 * volatile SRAM (e.g. reading Event Log).
2229 *
2230 * 5000 series and later (including 1000 series) have non-volatile SRAM,
2231 * and do not save/restore SRAM when power cycling.
2232 */
2233 ret = iwl_poll_bit(trans, CSR_GP_CNTRL, poll, mask, 15000);
2234 if (unlikely(ret < 0)) {
2235 u32 cntrl = iwl_read32(trans, CSR_GP_CNTRL);
2236
2237 WARN_ONCE(1,
2238 "Timeout waiting for hardware access (CSR_GP_CNTRL 0x%08x)\n",
2239 cntrl);
2240
2241 iwl_trans_pcie_dump_regs(trans);
2242
2243 if (iwlwifi_mod_params.remove_when_gone && cntrl == ~0U)
2244 iwl_trans_pcie_remove(trans, false);
2245 else
2246 iwl_write32(trans, CSR_RESET,
2247 CSR_RESET_REG_FLAG_FORCE_NMI);
2248
2249 spin_unlock(&trans_pcie->reg_lock);
2250 return false;
2251 }
2252
2253out:
2254 /*
2255 * Fool sparse by faking we release the lock - sparse will
2256 * track nic_access anyway.
2257 */
2258 __release(&trans_pcie->reg_lock);
2259 return true;
2260}
2261
2262static bool iwl_trans_pcie_grab_nic_access(struct iwl_trans *trans)
2263{
2264 bool ret;
2265
2266 local_bh_disable();
2267 ret = __iwl_trans_pcie_grab_nic_access(trans);
2268 if (ret) {
2269 /* keep BHs disabled until iwl_trans_pcie_release_nic_access */
2270 return ret;
2271 }
2272 local_bh_enable();
2273 return false;
2274}
2275
2276static void iwl_trans_pcie_release_nic_access(struct iwl_trans *trans)
2277{
2278 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2279
2280 lockdep_assert_held(&trans_pcie->reg_lock);
2281
2282 /*
2283 * Fool sparse by faking we acquiring the lock - sparse will
2284 * track nic_access anyway.
2285 */
2286 __acquire(&trans_pcie->reg_lock);
2287
2288 if (trans_pcie->cmd_hold_nic_awake)
2289 goto out;
2290 if (trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_BZ)
2291 __iwl_trans_pcie_clear_bit(trans, CSR_GP_CNTRL,
2292 CSR_GP_CNTRL_REG_FLAG_BZ_MAC_ACCESS_REQ);
2293 else
2294 __iwl_trans_pcie_clear_bit(trans, CSR_GP_CNTRL,
2295 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2296 /*
2297 * Above we read the CSR_GP_CNTRL register, which will flush
2298 * any previous writes, but we need the write that clears the
2299 * MAC_ACCESS_REQ bit to be performed before any other writes
2300 * scheduled on different CPUs (after we drop reg_lock).
2301 */
2302out:
2303 spin_unlock_bh(&trans_pcie->reg_lock);
2304}
2305
2306static int iwl_trans_pcie_read_mem(struct iwl_trans *trans, u32 addr,
2307 void *buf, int dwords)
2308{
2309#define IWL_MAX_HW_ERRS 5
2310 unsigned int num_consec_hw_errors = 0;
2311 int offs = 0;
2312 u32 *vals = buf;
2313
2314 while (offs < dwords) {
2315 /* limit the time we spin here under lock to 1/2s */
2316 unsigned long end = jiffies + HZ / 2;
2317 bool resched = false;
2318
2319 if (iwl_trans_grab_nic_access(trans)) {
2320 iwl_write32(trans, HBUS_TARG_MEM_RADDR,
2321 addr + 4 * offs);
2322
2323 while (offs < dwords) {
2324 vals[offs] = iwl_read32(trans,
2325 HBUS_TARG_MEM_RDAT);
2326
2327 if (iwl_trans_is_hw_error_value(vals[offs]))
2328 num_consec_hw_errors++;
2329 else
2330 num_consec_hw_errors = 0;
2331
2332 if (num_consec_hw_errors >= IWL_MAX_HW_ERRS) {
2333 iwl_trans_release_nic_access(trans);
2334 return -EIO;
2335 }
2336
2337 offs++;
2338
2339 if (time_after(jiffies, end)) {
2340 resched = true;
2341 break;
2342 }
2343 }
2344 iwl_trans_release_nic_access(trans);
2345
2346 if (resched)
2347 cond_resched();
2348 } else {
2349 return -EBUSY;
2350 }
2351 }
2352
2353 return 0;
2354}
2355
2356static int iwl_trans_pcie_write_mem(struct iwl_trans *trans, u32 addr,
2357 const void *buf, int dwords)
2358{
2359 int offs, ret = 0;
2360 const u32 *vals = buf;
2361
2362 if (iwl_trans_grab_nic_access(trans)) {
2363 iwl_write32(trans, HBUS_TARG_MEM_WADDR, addr);
2364 for (offs = 0; offs < dwords; offs++)
2365 iwl_write32(trans, HBUS_TARG_MEM_WDAT,
2366 vals ? vals[offs] : 0);
2367 iwl_trans_release_nic_access(trans);
2368 } else {
2369 ret = -EBUSY;
2370 }
2371 return ret;
2372}
2373
2374static int iwl_trans_pcie_read_config32(struct iwl_trans *trans, u32 ofs,
2375 u32 *val)
2376{
2377 return pci_read_config_dword(IWL_TRANS_GET_PCIE_TRANS(trans)->pci_dev,
2378 ofs, val);
2379}
2380
2381#define IWL_FLUSH_WAIT_MS 2000
2382
2383static int iwl_trans_pcie_rxq_dma_data(struct iwl_trans *trans, int queue,
2384 struct iwl_trans_rxq_dma_data *data)
2385{
2386 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2387
2388 if (queue >= trans->num_rx_queues || !trans_pcie->rxq)
2389 return -EINVAL;
2390
2391 data->fr_bd_cb = trans_pcie->rxq[queue].bd_dma;
2392 data->urbd_stts_wrptr = trans_pcie->rxq[queue].rb_stts_dma;
2393 data->ur_bd_cb = trans_pcie->rxq[queue].used_bd_dma;
2394 data->fr_bd_wid = 0;
2395
2396 return 0;
2397}
2398
2399static int iwl_trans_pcie_wait_txq_empty(struct iwl_trans *trans, int txq_idx)
2400{
2401 struct iwl_txq *txq;
2402 unsigned long now = jiffies;
2403 bool overflow_tx;
2404 u8 wr_ptr;
2405
2406 /* Make sure the NIC is still alive in the bus */
2407 if (test_bit(STATUS_TRANS_DEAD, &trans->status))
2408 return -ENODEV;
2409
2410 if (!test_bit(txq_idx, trans->txqs.queue_used))
2411 return -EINVAL;
2412
2413 IWL_DEBUG_TX_QUEUES(trans, "Emptying queue %d...\n", txq_idx);
2414 txq = trans->txqs.txq[txq_idx];
2415
2416 spin_lock_bh(&txq->lock);
2417 overflow_tx = txq->overflow_tx ||
2418 !skb_queue_empty(&txq->overflow_q);
2419 spin_unlock_bh(&txq->lock);
2420
2421 wr_ptr = READ_ONCE(txq->write_ptr);
2422
2423 while ((txq->read_ptr != READ_ONCE(txq->write_ptr) ||
2424 overflow_tx) &&
2425 !time_after(jiffies,
2426 now + msecs_to_jiffies(IWL_FLUSH_WAIT_MS))) {
2427 u8 write_ptr = READ_ONCE(txq->write_ptr);
2428
2429 /*
2430 * If write pointer moved during the wait, warn only
2431 * if the TX came from op mode. In case TX came from
2432 * trans layer (overflow TX) don't warn.
2433 */
2434 if (WARN_ONCE(wr_ptr != write_ptr && !overflow_tx,
2435 "WR pointer moved while flushing %d -> %d\n",
2436 wr_ptr, write_ptr))
2437 return -ETIMEDOUT;
2438 wr_ptr = write_ptr;
2439
2440 usleep_range(1000, 2000);
2441
2442 spin_lock_bh(&txq->lock);
2443 overflow_tx = txq->overflow_tx ||
2444 !skb_queue_empty(&txq->overflow_q);
2445 spin_unlock_bh(&txq->lock);
2446 }
2447
2448 if (txq->read_ptr != txq->write_ptr) {
2449 IWL_ERR(trans,
2450 "fail to flush all tx fifo queues Q %d\n", txq_idx);
2451 iwl_txq_log_scd_error(trans, txq);
2452 return -ETIMEDOUT;
2453 }
2454
2455 IWL_DEBUG_TX_QUEUES(trans, "Queue %d is now empty.\n", txq_idx);
2456
2457 return 0;
2458}
2459
2460static int iwl_trans_pcie_wait_txqs_empty(struct iwl_trans *trans, u32 txq_bm)
2461{
2462 int cnt;
2463 int ret = 0;
2464
2465 /* waiting for all the tx frames complete might take a while */
2466 for (cnt = 0;
2467 cnt < trans->trans_cfg->base_params->num_of_queues;
2468 cnt++) {
2469
2470 if (cnt == trans->txqs.cmd.q_id)
2471 continue;
2472 if (!test_bit(cnt, trans->txqs.queue_used))
2473 continue;
2474 if (!(BIT(cnt) & txq_bm))
2475 continue;
2476
2477 ret = iwl_trans_pcie_wait_txq_empty(trans, cnt);
2478 if (ret)
2479 break;
2480 }
2481
2482 return ret;
2483}
2484
2485static void iwl_trans_pcie_set_bits_mask(struct iwl_trans *trans, u32 reg,
2486 u32 mask, u32 value)
2487{
2488 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2489
2490 spin_lock_bh(&trans_pcie->reg_lock);
2491 __iwl_trans_pcie_set_bits_mask(trans, reg, mask, value);
2492 spin_unlock_bh(&trans_pcie->reg_lock);
2493}
2494
2495static const char *get_csr_string(int cmd)
2496{
2497#define IWL_CMD(x) case x: return #x
2498 switch (cmd) {
2499 IWL_CMD(CSR_HW_IF_CONFIG_REG);
2500 IWL_CMD(CSR_INT_COALESCING);
2501 IWL_CMD(CSR_INT);
2502 IWL_CMD(CSR_INT_MASK);
2503 IWL_CMD(CSR_FH_INT_STATUS);
2504 IWL_CMD(CSR_GPIO_IN);
2505 IWL_CMD(CSR_RESET);
2506 IWL_CMD(CSR_GP_CNTRL);
2507 IWL_CMD(CSR_HW_REV);
2508 IWL_CMD(CSR_EEPROM_REG);
2509 IWL_CMD(CSR_EEPROM_GP);
2510 IWL_CMD(CSR_OTP_GP_REG);
2511 IWL_CMD(CSR_GIO_REG);
2512 IWL_CMD(CSR_GP_UCODE_REG);
2513 IWL_CMD(CSR_GP_DRIVER_REG);
2514 IWL_CMD(CSR_UCODE_DRV_GP1);
2515 IWL_CMD(CSR_UCODE_DRV_GP2);
2516 IWL_CMD(CSR_LED_REG);
2517 IWL_CMD(CSR_DRAM_INT_TBL_REG);
2518 IWL_CMD(CSR_GIO_CHICKEN_BITS);
2519 IWL_CMD(CSR_ANA_PLL_CFG);
2520 IWL_CMD(CSR_HW_REV_WA_REG);
2521 IWL_CMD(CSR_MONITOR_STATUS_REG);
2522 IWL_CMD(CSR_DBG_HPET_MEM_REG);
2523 default:
2524 return "UNKNOWN";
2525 }
2526#undef IWL_CMD
2527}
2528
2529void iwl_pcie_dump_csr(struct iwl_trans *trans)
2530{
2531 int i;
2532 static const u32 csr_tbl[] = {
2533 CSR_HW_IF_CONFIG_REG,
2534 CSR_INT_COALESCING,
2535 CSR_INT,
2536 CSR_INT_MASK,
2537 CSR_FH_INT_STATUS,
2538 CSR_GPIO_IN,
2539 CSR_RESET,
2540 CSR_GP_CNTRL,
2541 CSR_HW_REV,
2542 CSR_EEPROM_REG,
2543 CSR_EEPROM_GP,
2544 CSR_OTP_GP_REG,
2545 CSR_GIO_REG,
2546 CSR_GP_UCODE_REG,
2547 CSR_GP_DRIVER_REG,
2548 CSR_UCODE_DRV_GP1,
2549 CSR_UCODE_DRV_GP2,
2550 CSR_LED_REG,
2551 CSR_DRAM_INT_TBL_REG,
2552 CSR_GIO_CHICKEN_BITS,
2553 CSR_ANA_PLL_CFG,
2554 CSR_MONITOR_STATUS_REG,
2555 CSR_HW_REV_WA_REG,
2556 CSR_DBG_HPET_MEM_REG
2557 };
2558 IWL_ERR(trans, "CSR values:\n");
2559 IWL_ERR(trans, "(2nd byte of CSR_INT_COALESCING is "
2560 "CSR_INT_PERIODIC_REG)\n");
2561 for (i = 0; i < ARRAY_SIZE(csr_tbl); i++) {
2562 IWL_ERR(trans, " %25s: 0X%08x\n",
2563 get_csr_string(csr_tbl[i]),
2564 iwl_read32(trans, csr_tbl[i]));
2565 }
2566}
2567
2568#ifdef CONFIG_IWLWIFI_DEBUGFS
2569/* create and remove of files */
2570#define DEBUGFS_ADD_FILE(name, parent, mode) do { \
2571 debugfs_create_file(#name, mode, parent, trans, \
2572 &iwl_dbgfs_##name##_ops); \
2573} while (0)
2574
2575/* file operation */
2576#define DEBUGFS_READ_FILE_OPS(name) \
2577static const struct file_operations iwl_dbgfs_##name##_ops = { \
2578 .read = iwl_dbgfs_##name##_read, \
2579 .open = simple_open, \
2580 .llseek = generic_file_llseek, \
2581};
2582
2583#define DEBUGFS_WRITE_FILE_OPS(name) \
2584static const struct file_operations iwl_dbgfs_##name##_ops = { \
2585 .write = iwl_dbgfs_##name##_write, \
2586 .open = simple_open, \
2587 .llseek = generic_file_llseek, \
2588};
2589
2590#define DEBUGFS_READ_WRITE_FILE_OPS(name) \
2591static const struct file_operations iwl_dbgfs_##name##_ops = { \
2592 .write = iwl_dbgfs_##name##_write, \
2593 .read = iwl_dbgfs_##name##_read, \
2594 .open = simple_open, \
2595 .llseek = generic_file_llseek, \
2596};
2597
2598struct iwl_dbgfs_tx_queue_priv {
2599 struct iwl_trans *trans;
2600};
2601
2602struct iwl_dbgfs_tx_queue_state {
2603 loff_t pos;
2604};
2605
2606static void *iwl_dbgfs_tx_queue_seq_start(struct seq_file *seq, loff_t *pos)
2607{
2608 struct iwl_dbgfs_tx_queue_priv *priv = seq->private;
2609 struct iwl_dbgfs_tx_queue_state *state;
2610
2611 if (*pos >= priv->trans->trans_cfg->base_params->num_of_queues)
2612 return NULL;
2613
2614 state = kmalloc(sizeof(*state), GFP_KERNEL);
2615 if (!state)
2616 return NULL;
2617 state->pos = *pos;
2618 return state;
2619}
2620
2621static void *iwl_dbgfs_tx_queue_seq_next(struct seq_file *seq,
2622 void *v, loff_t *pos)
2623{
2624 struct iwl_dbgfs_tx_queue_priv *priv = seq->private;
2625 struct iwl_dbgfs_tx_queue_state *state = v;
2626
2627 *pos = ++state->pos;
2628
2629 if (*pos >= priv->trans->trans_cfg->base_params->num_of_queues)
2630 return NULL;
2631
2632 return state;
2633}
2634
2635static void iwl_dbgfs_tx_queue_seq_stop(struct seq_file *seq, void *v)
2636{
2637 kfree(v);
2638}
2639
2640static int iwl_dbgfs_tx_queue_seq_show(struct seq_file *seq, void *v)
2641{
2642 struct iwl_dbgfs_tx_queue_priv *priv = seq->private;
2643 struct iwl_dbgfs_tx_queue_state *state = v;
2644 struct iwl_trans *trans = priv->trans;
2645 struct iwl_txq *txq = trans->txqs.txq[state->pos];
2646
2647 seq_printf(seq, "hwq %.3u: used=%d stopped=%d ",
2648 (unsigned int)state->pos,
2649 !!test_bit(state->pos, trans->txqs.queue_used),
2650 !!test_bit(state->pos, trans->txqs.queue_stopped));
2651 if (txq)
2652 seq_printf(seq,
2653 "read=%u write=%u need_update=%d frozen=%d n_window=%d ampdu=%d",
2654 txq->read_ptr, txq->write_ptr,
2655 txq->need_update, txq->frozen,
2656 txq->n_window, txq->ampdu);
2657 else
2658 seq_puts(seq, "(unallocated)");
2659
2660 if (state->pos == trans->txqs.cmd.q_id)
2661 seq_puts(seq, " (HCMD)");
2662 seq_puts(seq, "\n");
2663
2664 return 0;
2665}
2666
2667static const struct seq_operations iwl_dbgfs_tx_queue_seq_ops = {
2668 .start = iwl_dbgfs_tx_queue_seq_start,
2669 .next = iwl_dbgfs_tx_queue_seq_next,
2670 .stop = iwl_dbgfs_tx_queue_seq_stop,
2671 .show = iwl_dbgfs_tx_queue_seq_show,
2672};
2673
2674static int iwl_dbgfs_tx_queue_open(struct inode *inode, struct file *filp)
2675{
2676 struct iwl_dbgfs_tx_queue_priv *priv;
2677
2678 priv = __seq_open_private(filp, &iwl_dbgfs_tx_queue_seq_ops,
2679 sizeof(*priv));
2680
2681 if (!priv)
2682 return -ENOMEM;
2683
2684 priv->trans = inode->i_private;
2685 return 0;
2686}
2687
2688static ssize_t iwl_dbgfs_rx_queue_read(struct file *file,
2689 char __user *user_buf,
2690 size_t count, loff_t *ppos)
2691{
2692 struct iwl_trans *trans = file->private_data;
2693 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2694 char *buf;
2695 int pos = 0, i, ret;
2696 size_t bufsz;
2697
2698 bufsz = sizeof(char) * 121 * trans->num_rx_queues;
2699
2700 if (!trans_pcie->rxq)
2701 return -EAGAIN;
2702
2703 buf = kzalloc(bufsz, GFP_KERNEL);
2704 if (!buf)
2705 return -ENOMEM;
2706
2707 for (i = 0; i < trans->num_rx_queues && pos < bufsz; i++) {
2708 struct iwl_rxq *rxq = &trans_pcie->rxq[i];
2709
2710 pos += scnprintf(buf + pos, bufsz - pos, "queue#: %2d\n",
2711 i);
2712 pos += scnprintf(buf + pos, bufsz - pos, "\tread: %u\n",
2713 rxq->read);
2714 pos += scnprintf(buf + pos, bufsz - pos, "\twrite: %u\n",
2715 rxq->write);
2716 pos += scnprintf(buf + pos, bufsz - pos, "\twrite_actual: %u\n",
2717 rxq->write_actual);
2718 pos += scnprintf(buf + pos, bufsz - pos, "\tneed_update: %2d\n",
2719 rxq->need_update);
2720 pos += scnprintf(buf + pos, bufsz - pos, "\tfree_count: %u\n",
2721 rxq->free_count);
2722 if (rxq->rb_stts) {
2723 u32 r = iwl_get_closed_rb_stts(trans, rxq);
2724 pos += scnprintf(buf + pos, bufsz - pos,
2725 "\tclosed_rb_num: %u\n", r);
2726 } else {
2727 pos += scnprintf(buf + pos, bufsz - pos,
2728 "\tclosed_rb_num: Not Allocated\n");
2729 }
2730 }
2731 ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
2732 kfree(buf);
2733
2734 return ret;
2735}
2736
2737static ssize_t iwl_dbgfs_interrupt_read(struct file *file,
2738 char __user *user_buf,
2739 size_t count, loff_t *ppos)
2740{
2741 struct iwl_trans *trans = file->private_data;
2742 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2743 struct isr_statistics *isr_stats = &trans_pcie->isr_stats;
2744
2745 int pos = 0;
2746 char *buf;
2747 int bufsz = 24 * 64; /* 24 items * 64 char per item */
2748 ssize_t ret;
2749
2750 buf = kzalloc(bufsz, GFP_KERNEL);
2751 if (!buf)
2752 return -ENOMEM;
2753
2754 pos += scnprintf(buf + pos, bufsz - pos,
2755 "Interrupt Statistics Report:\n");
2756
2757 pos += scnprintf(buf + pos, bufsz - pos, "HW Error:\t\t\t %u\n",
2758 isr_stats->hw);
2759 pos += scnprintf(buf + pos, bufsz - pos, "SW Error:\t\t\t %u\n",
2760 isr_stats->sw);
2761 if (isr_stats->sw || isr_stats->hw) {
2762 pos += scnprintf(buf + pos, bufsz - pos,
2763 "\tLast Restarting Code: 0x%X\n",
2764 isr_stats->err_code);
2765 }
2766#ifdef CONFIG_IWLWIFI_DEBUG
2767 pos += scnprintf(buf + pos, bufsz - pos, "Frame transmitted:\t\t %u\n",
2768 isr_stats->sch);
2769 pos += scnprintf(buf + pos, bufsz - pos, "Alive interrupt:\t\t %u\n",
2770 isr_stats->alive);
2771#endif
2772 pos += scnprintf(buf + pos, bufsz - pos,
2773 "HW RF KILL switch toggled:\t %u\n", isr_stats->rfkill);
2774
2775 pos += scnprintf(buf + pos, bufsz - pos, "CT KILL:\t\t\t %u\n",
2776 isr_stats->ctkill);
2777
2778 pos += scnprintf(buf + pos, bufsz - pos, "Wakeup Interrupt:\t\t %u\n",
2779 isr_stats->wakeup);
2780
2781 pos += scnprintf(buf + pos, bufsz - pos,
2782 "Rx command responses:\t\t %u\n", isr_stats->rx);
2783
2784 pos += scnprintf(buf + pos, bufsz - pos, "Tx/FH interrupt:\t\t %u\n",
2785 isr_stats->tx);
2786
2787 pos += scnprintf(buf + pos, bufsz - pos, "Unexpected INTA:\t\t %u\n",
2788 isr_stats->unhandled);
2789
2790 ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
2791 kfree(buf);
2792 return ret;
2793}
2794
2795static ssize_t iwl_dbgfs_interrupt_write(struct file *file,
2796 const char __user *user_buf,
2797 size_t count, loff_t *ppos)
2798{
2799 struct iwl_trans *trans = file->private_data;
2800 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2801 struct isr_statistics *isr_stats = &trans_pcie->isr_stats;
2802 u32 reset_flag;
2803 int ret;
2804
2805 ret = kstrtou32_from_user(user_buf, count, 16, &reset_flag);
2806 if (ret)
2807 return ret;
2808 if (reset_flag == 0)
2809 memset(isr_stats, 0, sizeof(*isr_stats));
2810
2811 return count;
2812}
2813
2814static ssize_t iwl_dbgfs_csr_write(struct file *file,
2815 const char __user *user_buf,
2816 size_t count, loff_t *ppos)
2817{
2818 struct iwl_trans *trans = file->private_data;
2819
2820 iwl_pcie_dump_csr(trans);
2821
2822 return count;
2823}
2824
2825static ssize_t iwl_dbgfs_fh_reg_read(struct file *file,
2826 char __user *user_buf,
2827 size_t count, loff_t *ppos)
2828{
2829 struct iwl_trans *trans = file->private_data;
2830 char *buf = NULL;
2831 ssize_t ret;
2832
2833 ret = iwl_dump_fh(trans, &buf);
2834 if (ret < 0)
2835 return ret;
2836 if (!buf)
2837 return -EINVAL;
2838 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
2839 kfree(buf);
2840 return ret;
2841}
2842
2843static ssize_t iwl_dbgfs_rfkill_read(struct file *file,
2844 char __user *user_buf,
2845 size_t count, loff_t *ppos)
2846{
2847 struct iwl_trans *trans = file->private_data;
2848 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2849 char buf[100];
2850 int pos;
2851
2852 pos = scnprintf(buf, sizeof(buf), "debug: %d\nhw: %d\n",
2853 trans_pcie->debug_rfkill,
2854 !(iwl_read32(trans, CSR_GP_CNTRL) &
2855 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW));
2856
2857 return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
2858}
2859
2860static ssize_t iwl_dbgfs_rfkill_write(struct file *file,
2861 const char __user *user_buf,
2862 size_t count, loff_t *ppos)
2863{
2864 struct iwl_trans *trans = file->private_data;
2865 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2866 bool new_value;
2867 int ret;
2868
2869 ret = kstrtobool_from_user(user_buf, count, &new_value);
2870 if (ret)
2871 return ret;
2872 if (new_value == trans_pcie->debug_rfkill)
2873 return count;
2874 IWL_WARN(trans, "changing debug rfkill %d->%d\n",
2875 trans_pcie->debug_rfkill, new_value);
2876 trans_pcie->debug_rfkill = new_value;
2877 iwl_pcie_handle_rfkill_irq(trans, false);
2878
2879 return count;
2880}
2881
2882static int iwl_dbgfs_monitor_data_open(struct inode *inode,
2883 struct file *file)
2884{
2885 struct iwl_trans *trans = inode->i_private;
2886 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2887
2888 if (!trans->dbg.dest_tlv ||
2889 trans->dbg.dest_tlv->monitor_mode != EXTERNAL_MODE) {
2890 IWL_ERR(trans, "Debug destination is not set to DRAM\n");
2891 return -ENOENT;
2892 }
2893
2894 if (trans_pcie->fw_mon_data.state != IWL_FW_MON_DBGFS_STATE_CLOSED)
2895 return -EBUSY;
2896
2897 trans_pcie->fw_mon_data.state = IWL_FW_MON_DBGFS_STATE_OPEN;
2898 return simple_open(inode, file);
2899}
2900
2901static int iwl_dbgfs_monitor_data_release(struct inode *inode,
2902 struct file *file)
2903{
2904 struct iwl_trans_pcie *trans_pcie =
2905 IWL_TRANS_GET_PCIE_TRANS(inode->i_private);
2906
2907 if (trans_pcie->fw_mon_data.state == IWL_FW_MON_DBGFS_STATE_OPEN)
2908 trans_pcie->fw_mon_data.state = IWL_FW_MON_DBGFS_STATE_CLOSED;
2909 return 0;
2910}
2911
2912static bool iwl_write_to_user_buf(char __user *user_buf, ssize_t count,
2913 void *buf, ssize_t *size,
2914 ssize_t *bytes_copied)
2915{
2916 ssize_t buf_size_left = count - *bytes_copied;
2917
2918 buf_size_left = buf_size_left - (buf_size_left % sizeof(u32));
2919 if (*size > buf_size_left)
2920 *size = buf_size_left;
2921
2922 *size -= copy_to_user(user_buf, buf, *size);
2923 *bytes_copied += *size;
2924
2925 if (buf_size_left == *size)
2926 return true;
2927 return false;
2928}
2929
2930static ssize_t iwl_dbgfs_monitor_data_read(struct file *file,
2931 char __user *user_buf,
2932 size_t count, loff_t *ppos)
2933{
2934 struct iwl_trans *trans = file->private_data;
2935 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2936 u8 *cpu_addr = (void *)trans->dbg.fw_mon.block, *curr_buf;
2937 struct cont_rec *data = &trans_pcie->fw_mon_data;
2938 u32 write_ptr_addr, wrap_cnt_addr, write_ptr, wrap_cnt;
2939 ssize_t size, bytes_copied = 0;
2940 bool b_full;
2941
2942 if (trans->dbg.dest_tlv) {
2943 write_ptr_addr =
2944 le32_to_cpu(trans->dbg.dest_tlv->write_ptr_reg);
2945 wrap_cnt_addr = le32_to_cpu(trans->dbg.dest_tlv->wrap_count);
2946 } else {
2947 write_ptr_addr = MON_BUFF_WRPTR;
2948 wrap_cnt_addr = MON_BUFF_CYCLE_CNT;
2949 }
2950
2951 if (unlikely(!trans->dbg.rec_on))
2952 return 0;
2953
2954 mutex_lock(&data->mutex);
2955 if (data->state ==
2956 IWL_FW_MON_DBGFS_STATE_DISABLED) {
2957 mutex_unlock(&data->mutex);
2958 return 0;
2959 }
2960
2961 /* write_ptr position in bytes rather then DW */
2962 write_ptr = iwl_read_prph(trans, write_ptr_addr) * sizeof(u32);
2963 wrap_cnt = iwl_read_prph(trans, wrap_cnt_addr);
2964
2965 if (data->prev_wrap_cnt == wrap_cnt) {
2966 size = write_ptr - data->prev_wr_ptr;
2967 curr_buf = cpu_addr + data->prev_wr_ptr;
2968 b_full = iwl_write_to_user_buf(user_buf, count,
2969 curr_buf, &size,
2970 &bytes_copied);
2971 data->prev_wr_ptr += size;
2972
2973 } else if (data->prev_wrap_cnt == wrap_cnt - 1 &&
2974 write_ptr < data->prev_wr_ptr) {
2975 size = trans->dbg.fw_mon.size - data->prev_wr_ptr;
2976 curr_buf = cpu_addr + data->prev_wr_ptr;
2977 b_full = iwl_write_to_user_buf(user_buf, count,
2978 curr_buf, &size,
2979 &bytes_copied);
2980 data->prev_wr_ptr += size;
2981
2982 if (!b_full) {
2983 size = write_ptr;
2984 b_full = iwl_write_to_user_buf(user_buf, count,
2985 cpu_addr, &size,
2986 &bytes_copied);
2987 data->prev_wr_ptr = size;
2988 data->prev_wrap_cnt++;
2989 }
2990 } else {
2991 if (data->prev_wrap_cnt == wrap_cnt - 1 &&
2992 write_ptr > data->prev_wr_ptr)
2993 IWL_WARN(trans,
2994 "write pointer passed previous write pointer, start copying from the beginning\n");
2995 else if (!unlikely(data->prev_wrap_cnt == 0 &&
2996 data->prev_wr_ptr == 0))
2997 IWL_WARN(trans,
2998 "monitor data is out of sync, start copying from the beginning\n");
2999
3000 size = write_ptr;
3001 b_full = iwl_write_to_user_buf(user_buf, count,
3002 cpu_addr, &size,
3003 &bytes_copied);
3004 data->prev_wr_ptr = size;
3005 data->prev_wrap_cnt = wrap_cnt;
3006 }
3007
3008 mutex_unlock(&data->mutex);
3009
3010 return bytes_copied;
3011}
3012
3013static ssize_t iwl_dbgfs_rf_read(struct file *file,
3014 char __user *user_buf,
3015 size_t count, loff_t *ppos)
3016{
3017 struct iwl_trans *trans = file->private_data;
3018 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
3019
3020 if (!trans_pcie->rf_name[0])
3021 return -ENODEV;
3022
3023 return simple_read_from_buffer(user_buf, count, ppos,
3024 trans_pcie->rf_name,
3025 strlen(trans_pcie->rf_name));
3026}
3027
3028DEBUGFS_READ_WRITE_FILE_OPS(interrupt);
3029DEBUGFS_READ_FILE_OPS(fh_reg);
3030DEBUGFS_READ_FILE_OPS(rx_queue);
3031DEBUGFS_WRITE_FILE_OPS(csr);
3032DEBUGFS_READ_WRITE_FILE_OPS(rfkill);
3033DEBUGFS_READ_FILE_OPS(rf);
3034
3035static const struct file_operations iwl_dbgfs_tx_queue_ops = {
3036 .owner = THIS_MODULE,
3037 .open = iwl_dbgfs_tx_queue_open,
3038 .read = seq_read,
3039 .llseek = seq_lseek,
3040 .release = seq_release_private,
3041};
3042
3043static const struct file_operations iwl_dbgfs_monitor_data_ops = {
3044 .read = iwl_dbgfs_monitor_data_read,
3045 .open = iwl_dbgfs_monitor_data_open,
3046 .release = iwl_dbgfs_monitor_data_release,
3047};
3048
3049/* Create the debugfs files and directories */
3050void iwl_trans_pcie_dbgfs_register(struct iwl_trans *trans)
3051{
3052 struct dentry *dir = trans->dbgfs_dir;
3053
3054 DEBUGFS_ADD_FILE(rx_queue, dir, 0400);
3055 DEBUGFS_ADD_FILE(tx_queue, dir, 0400);
3056 DEBUGFS_ADD_FILE(interrupt, dir, 0600);
3057 DEBUGFS_ADD_FILE(csr, dir, 0200);
3058 DEBUGFS_ADD_FILE(fh_reg, dir, 0400);
3059 DEBUGFS_ADD_FILE(rfkill, dir, 0600);
3060 DEBUGFS_ADD_FILE(monitor_data, dir, 0400);
3061 DEBUGFS_ADD_FILE(rf, dir, 0400);
3062}
3063
3064static void iwl_trans_pcie_debugfs_cleanup(struct iwl_trans *trans)
3065{
3066 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
3067 struct cont_rec *data = &trans_pcie->fw_mon_data;
3068
3069 mutex_lock(&data->mutex);
3070 data->state = IWL_FW_MON_DBGFS_STATE_DISABLED;
3071 mutex_unlock(&data->mutex);
3072}
3073#endif /*CONFIG_IWLWIFI_DEBUGFS */
3074
3075static u32 iwl_trans_pcie_get_cmdlen(struct iwl_trans *trans, void *tfd)
3076{
3077 u32 cmdlen = 0;
3078 int i;
3079
3080 for (i = 0; i < trans->txqs.tfd.max_tbs; i++)
3081 cmdlen += iwl_txq_gen1_tfd_tb_get_len(trans, tfd, i);
3082
3083 return cmdlen;
3084}
3085
3086static u32 iwl_trans_pcie_dump_rbs(struct iwl_trans *trans,
3087 struct iwl_fw_error_dump_data **data,
3088 int allocated_rb_nums)
3089{
3090 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
3091 int max_len = trans_pcie->rx_buf_bytes;
3092 /* Dump RBs is supported only for pre-9000 devices (1 queue) */
3093 struct iwl_rxq *rxq = &trans_pcie->rxq[0];
3094 u32 i, r, j, rb_len = 0;
3095
3096 spin_lock_bh(&rxq->lock);
3097
3098 r = iwl_get_closed_rb_stts(trans, rxq);
3099
3100 for (i = rxq->read, j = 0;
3101 i != r && j < allocated_rb_nums;
3102 i = (i + 1) & RX_QUEUE_MASK, j++) {
3103 struct iwl_rx_mem_buffer *rxb = rxq->queue[i];
3104 struct iwl_fw_error_dump_rb *rb;
3105
3106 dma_sync_single_for_cpu(trans->dev, rxb->page_dma,
3107 max_len, DMA_FROM_DEVICE);
3108
3109 rb_len += sizeof(**data) + sizeof(*rb) + max_len;
3110
3111 (*data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_RB);
3112 (*data)->len = cpu_to_le32(sizeof(*rb) + max_len);
3113 rb = (void *)(*data)->data;
3114 rb->index = cpu_to_le32(i);
3115 memcpy(rb->data, page_address(rxb->page), max_len);
3116
3117 *data = iwl_fw_error_next_data(*data);
3118 }
3119
3120 spin_unlock_bh(&rxq->lock);
3121
3122 return rb_len;
3123}
3124#define IWL_CSR_TO_DUMP (0x250)
3125
3126static u32 iwl_trans_pcie_dump_csr(struct iwl_trans *trans,
3127 struct iwl_fw_error_dump_data **data)
3128{
3129 u32 csr_len = sizeof(**data) + IWL_CSR_TO_DUMP;
3130 __le32 *val;
3131 int i;
3132
3133 (*data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_CSR);
3134 (*data)->len = cpu_to_le32(IWL_CSR_TO_DUMP);
3135 val = (void *)(*data)->data;
3136
3137 for (i = 0; i < IWL_CSR_TO_DUMP; i += 4)
3138 *val++ = cpu_to_le32(iwl_trans_pcie_read32(trans, i));
3139
3140 *data = iwl_fw_error_next_data(*data);
3141
3142 return csr_len;
3143}
3144
3145static u32 iwl_trans_pcie_fh_regs_dump(struct iwl_trans *trans,
3146 struct iwl_fw_error_dump_data **data)
3147{
3148 u32 fh_regs_len = FH_MEM_UPPER_BOUND - FH_MEM_LOWER_BOUND;
3149 __le32 *val;
3150 int i;
3151
3152 if (!iwl_trans_grab_nic_access(trans))
3153 return 0;
3154
3155 (*data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_FH_REGS);
3156 (*data)->len = cpu_to_le32(fh_regs_len);
3157 val = (void *)(*data)->data;
3158
3159 if (!trans->trans_cfg->gen2)
3160 for (i = FH_MEM_LOWER_BOUND; i < FH_MEM_UPPER_BOUND;
3161 i += sizeof(u32))
3162 *val++ = cpu_to_le32(iwl_trans_pcie_read32(trans, i));
3163 else
3164 for (i = iwl_umac_prph(trans, FH_MEM_LOWER_BOUND_GEN2);
3165 i < iwl_umac_prph(trans, FH_MEM_UPPER_BOUND_GEN2);
3166 i += sizeof(u32))
3167 *val++ = cpu_to_le32(iwl_trans_pcie_read_prph(trans,
3168 i));
3169
3170 iwl_trans_release_nic_access(trans);
3171
3172 *data = iwl_fw_error_next_data(*data);
3173
3174 return sizeof(**data) + fh_regs_len;
3175}
3176
3177static u32
3178iwl_trans_pci_dump_marbh_monitor(struct iwl_trans *trans,
3179 struct iwl_fw_error_dump_fw_mon *fw_mon_data,
3180 u32 monitor_len)
3181{
3182 u32 buf_size_in_dwords = (monitor_len >> 2);
3183 u32 *buffer = (u32 *)fw_mon_data->data;
3184 u32 i;
3185
3186 if (!iwl_trans_grab_nic_access(trans))
3187 return 0;
3188
3189 iwl_write_umac_prph_no_grab(trans, MON_DMARB_RD_CTL_ADDR, 0x1);
3190 for (i = 0; i < buf_size_in_dwords; i++)
3191 buffer[i] = iwl_read_umac_prph_no_grab(trans,
3192 MON_DMARB_RD_DATA_ADDR);
3193 iwl_write_umac_prph_no_grab(trans, MON_DMARB_RD_CTL_ADDR, 0x0);
3194
3195 iwl_trans_release_nic_access(trans);
3196
3197 return monitor_len;
3198}
3199
3200static void
3201iwl_trans_pcie_dump_pointers(struct iwl_trans *trans,
3202 struct iwl_fw_error_dump_fw_mon *fw_mon_data)
3203{
3204 u32 base, base_high, write_ptr, write_ptr_val, wrap_cnt;
3205
3206 if (trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_AX210) {
3207 base = DBGC_CUR_DBGBUF_BASE_ADDR_LSB;
3208 base_high = DBGC_CUR_DBGBUF_BASE_ADDR_MSB;
3209 write_ptr = DBGC_CUR_DBGBUF_STATUS;
3210 wrap_cnt = DBGC_DBGBUF_WRAP_AROUND;
3211 } else if (trans->dbg.dest_tlv) {
3212 write_ptr = le32_to_cpu(trans->dbg.dest_tlv->write_ptr_reg);
3213 wrap_cnt = le32_to_cpu(trans->dbg.dest_tlv->wrap_count);
3214 base = le32_to_cpu(trans->dbg.dest_tlv->base_reg);
3215 } else {
3216 base = MON_BUFF_BASE_ADDR;
3217 write_ptr = MON_BUFF_WRPTR;
3218 wrap_cnt = MON_BUFF_CYCLE_CNT;
3219 }
3220
3221 write_ptr_val = iwl_read_prph(trans, write_ptr);
3222 fw_mon_data->fw_mon_cycle_cnt =
3223 cpu_to_le32(iwl_read_prph(trans, wrap_cnt));
3224 fw_mon_data->fw_mon_base_ptr =
3225 cpu_to_le32(iwl_read_prph(trans, base));
3226 if (trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_AX210) {
3227 fw_mon_data->fw_mon_base_high_ptr =
3228 cpu_to_le32(iwl_read_prph(trans, base_high));
3229 write_ptr_val &= DBGC_CUR_DBGBUF_STATUS_OFFSET_MSK;
3230 /* convert wrtPtr to DWs, to align with all HWs */
3231 write_ptr_val >>= 2;
3232 }
3233 fw_mon_data->fw_mon_wr_ptr = cpu_to_le32(write_ptr_val);
3234}
3235
3236static u32
3237iwl_trans_pcie_dump_monitor(struct iwl_trans *trans,
3238 struct iwl_fw_error_dump_data **data,
3239 u32 monitor_len)
3240{
3241 struct iwl_dram_data *fw_mon = &trans->dbg.fw_mon;
3242 u32 len = 0;
3243
3244 if (trans->dbg.dest_tlv ||
3245 (fw_mon->size &&
3246 (trans->trans_cfg->device_family == IWL_DEVICE_FAMILY_7000 ||
3247 trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_AX210))) {
3248 struct iwl_fw_error_dump_fw_mon *fw_mon_data;
3249
3250 (*data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_FW_MONITOR);
3251 fw_mon_data = (void *)(*data)->data;
3252
3253 iwl_trans_pcie_dump_pointers(trans, fw_mon_data);
3254
3255 len += sizeof(**data) + sizeof(*fw_mon_data);
3256 if (fw_mon->size) {
3257 memcpy(fw_mon_data->data, fw_mon->block, fw_mon->size);
3258 monitor_len = fw_mon->size;
3259 } else if (trans->dbg.dest_tlv->monitor_mode == SMEM_MODE) {
3260 u32 base = le32_to_cpu(fw_mon_data->fw_mon_base_ptr);
3261 /*
3262 * Update pointers to reflect actual values after
3263 * shifting
3264 */
3265 if (trans->dbg.dest_tlv->version) {
3266 base = (iwl_read_prph(trans, base) &
3267 IWL_LDBG_M2S_BUF_BA_MSK) <<
3268 trans->dbg.dest_tlv->base_shift;
3269 base *= IWL_M2S_UNIT_SIZE;
3270 base += trans->cfg->smem_offset;
3271 } else {
3272 base = iwl_read_prph(trans, base) <<
3273 trans->dbg.dest_tlv->base_shift;
3274 }
3275
3276 iwl_trans_read_mem(trans, base, fw_mon_data->data,
3277 monitor_len / sizeof(u32));
3278 } else if (trans->dbg.dest_tlv->monitor_mode == MARBH_MODE) {
3279 monitor_len =
3280 iwl_trans_pci_dump_marbh_monitor(trans,
3281 fw_mon_data,
3282 monitor_len);
3283 } else {
3284 /* Didn't match anything - output no monitor data */
3285 monitor_len = 0;
3286 }
3287
3288 len += monitor_len;
3289 (*data)->len = cpu_to_le32(monitor_len + sizeof(*fw_mon_data));
3290 }
3291
3292 return len;
3293}
3294
3295static int iwl_trans_get_fw_monitor_len(struct iwl_trans *trans, u32 *len)
3296{
3297 if (trans->dbg.fw_mon.size) {
3298 *len += sizeof(struct iwl_fw_error_dump_data) +
3299 sizeof(struct iwl_fw_error_dump_fw_mon) +
3300 trans->dbg.fw_mon.size;
3301 return trans->dbg.fw_mon.size;
3302 } else if (trans->dbg.dest_tlv) {
3303 u32 base, end, cfg_reg, monitor_len;
3304
3305 if (trans->dbg.dest_tlv->version == 1) {
3306 cfg_reg = le32_to_cpu(trans->dbg.dest_tlv->base_reg);
3307 cfg_reg = iwl_read_prph(trans, cfg_reg);
3308 base = (cfg_reg & IWL_LDBG_M2S_BUF_BA_MSK) <<
3309 trans->dbg.dest_tlv->base_shift;
3310 base *= IWL_M2S_UNIT_SIZE;
3311 base += trans->cfg->smem_offset;
3312
3313 monitor_len =
3314 (cfg_reg & IWL_LDBG_M2S_BUF_SIZE_MSK) >>
3315 trans->dbg.dest_tlv->end_shift;
3316 monitor_len *= IWL_M2S_UNIT_SIZE;
3317 } else {
3318 base = le32_to_cpu(trans->dbg.dest_tlv->base_reg);
3319 end = le32_to_cpu(trans->dbg.dest_tlv->end_reg);
3320
3321 base = iwl_read_prph(trans, base) <<
3322 trans->dbg.dest_tlv->base_shift;
3323 end = iwl_read_prph(trans, end) <<
3324 trans->dbg.dest_tlv->end_shift;
3325
3326 /* Make "end" point to the actual end */
3327 if (trans->trans_cfg->device_family >=
3328 IWL_DEVICE_FAMILY_8000 ||
3329 trans->dbg.dest_tlv->monitor_mode == MARBH_MODE)
3330 end += (1 << trans->dbg.dest_tlv->end_shift);
3331 monitor_len = end - base;
3332 }
3333 *len += sizeof(struct iwl_fw_error_dump_data) +
3334 sizeof(struct iwl_fw_error_dump_fw_mon) +
3335 monitor_len;
3336 return monitor_len;
3337 }
3338 return 0;
3339}
3340
3341static struct iwl_trans_dump_data *
3342iwl_trans_pcie_dump_data(struct iwl_trans *trans,
3343 u32 dump_mask,
3344 const struct iwl_dump_sanitize_ops *sanitize_ops,
3345 void *sanitize_ctx)
3346{
3347 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
3348 struct iwl_fw_error_dump_data *data;
3349 struct iwl_txq *cmdq = trans->txqs.txq[trans->txqs.cmd.q_id];
3350 struct iwl_fw_error_dump_txcmd *txcmd;
3351 struct iwl_trans_dump_data *dump_data;
3352 u32 len, num_rbs = 0, monitor_len = 0;
3353 int i, ptr;
3354 bool dump_rbs = test_bit(STATUS_FW_ERROR, &trans->status) &&
3355 !trans->trans_cfg->mq_rx_supported &&
3356 dump_mask & BIT(IWL_FW_ERROR_DUMP_RB);
3357
3358 if (!dump_mask)
3359 return NULL;
3360
3361 /* transport dump header */
3362 len = sizeof(*dump_data);
3363
3364 /* host commands */
3365 if (dump_mask & BIT(IWL_FW_ERROR_DUMP_TXCMD) && cmdq)
3366 len += sizeof(*data) +
3367 cmdq->n_window * (sizeof(*txcmd) +
3368 TFD_MAX_PAYLOAD_SIZE);
3369
3370 /* FW monitor */
3371 if (dump_mask & BIT(IWL_FW_ERROR_DUMP_FW_MONITOR))
3372 monitor_len = iwl_trans_get_fw_monitor_len(trans, &len);
3373
3374 /* CSR registers */
3375 if (dump_mask & BIT(IWL_FW_ERROR_DUMP_CSR))
3376 len += sizeof(*data) + IWL_CSR_TO_DUMP;
3377
3378 /* FH registers */
3379 if (dump_mask & BIT(IWL_FW_ERROR_DUMP_FH_REGS)) {
3380 if (trans->trans_cfg->gen2)
3381 len += sizeof(*data) +
3382 (iwl_umac_prph(trans, FH_MEM_UPPER_BOUND_GEN2) -
3383 iwl_umac_prph(trans, FH_MEM_LOWER_BOUND_GEN2));
3384 else
3385 len += sizeof(*data) +
3386 (FH_MEM_UPPER_BOUND -
3387 FH_MEM_LOWER_BOUND);
3388 }
3389
3390 if (dump_rbs) {
3391 /* Dump RBs is supported only for pre-9000 devices (1 queue) */
3392 struct iwl_rxq *rxq = &trans_pcie->rxq[0];
3393 /* RBs */
3394 num_rbs = iwl_get_closed_rb_stts(trans, rxq);
3395 num_rbs = (num_rbs - rxq->read) & RX_QUEUE_MASK;
3396 len += num_rbs * (sizeof(*data) +
3397 sizeof(struct iwl_fw_error_dump_rb) +
3398 (PAGE_SIZE << trans_pcie->rx_page_order));
3399 }
3400
3401 /* Paged memory for gen2 HW */
3402 if (trans->trans_cfg->gen2 && dump_mask & BIT(IWL_FW_ERROR_DUMP_PAGING))
3403 for (i = 0; i < trans->init_dram.paging_cnt; i++)
3404 len += sizeof(*data) +
3405 sizeof(struct iwl_fw_error_dump_paging) +
3406 trans->init_dram.paging[i].size;
3407
3408 dump_data = vzalloc(len);
3409 if (!dump_data)
3410 return NULL;
3411
3412 len = 0;
3413 data = (void *)dump_data->data;
3414
3415 if (dump_mask & BIT(IWL_FW_ERROR_DUMP_TXCMD) && cmdq) {
3416 u16 tfd_size = trans->txqs.tfd.size;
3417
3418 data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_TXCMD);
3419 txcmd = (void *)data->data;
3420 spin_lock_bh(&cmdq->lock);
3421 ptr = cmdq->write_ptr;
3422 for (i = 0; i < cmdq->n_window; i++) {
3423 u8 idx = iwl_txq_get_cmd_index(cmdq, ptr);
3424 u8 tfdidx;
3425 u32 caplen, cmdlen;
3426
3427 if (trans->trans_cfg->gen2)
3428 tfdidx = idx;
3429 else
3430 tfdidx = ptr;
3431
3432 cmdlen = iwl_trans_pcie_get_cmdlen(trans,
3433 (u8 *)cmdq->tfds +
3434 tfd_size * tfdidx);
3435 caplen = min_t(u32, TFD_MAX_PAYLOAD_SIZE, cmdlen);
3436
3437 if (cmdlen) {
3438 len += sizeof(*txcmd) + caplen;
3439 txcmd->cmdlen = cpu_to_le32(cmdlen);
3440 txcmd->caplen = cpu_to_le32(caplen);
3441 memcpy(txcmd->data, cmdq->entries[idx].cmd,
3442 caplen);
3443 if (sanitize_ops && sanitize_ops->frob_hcmd)
3444 sanitize_ops->frob_hcmd(sanitize_ctx,
3445 txcmd->data,
3446 caplen);
3447 txcmd = (void *)((u8 *)txcmd->data + caplen);
3448 }
3449
3450 ptr = iwl_txq_dec_wrap(trans, ptr);
3451 }
3452 spin_unlock_bh(&cmdq->lock);
3453
3454 data->len = cpu_to_le32(len);
3455 len += sizeof(*data);
3456 data = iwl_fw_error_next_data(data);
3457 }
3458
3459 if (dump_mask & BIT(IWL_FW_ERROR_DUMP_CSR))
3460 len += iwl_trans_pcie_dump_csr(trans, &data);
3461 if (dump_mask & BIT(IWL_FW_ERROR_DUMP_FH_REGS))
3462 len += iwl_trans_pcie_fh_regs_dump(trans, &data);
3463 if (dump_rbs)
3464 len += iwl_trans_pcie_dump_rbs(trans, &data, num_rbs);
3465
3466 /* Paged memory for gen2 HW */
3467 if (trans->trans_cfg->gen2 &&
3468 dump_mask & BIT(IWL_FW_ERROR_DUMP_PAGING)) {
3469 for (i = 0; i < trans->init_dram.paging_cnt; i++) {
3470 struct iwl_fw_error_dump_paging *paging;
3471 u32 page_len = trans->init_dram.paging[i].size;
3472
3473 data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_PAGING);
3474 data->len = cpu_to_le32(sizeof(*paging) + page_len);
3475 paging = (void *)data->data;
3476 paging->index = cpu_to_le32(i);
3477 memcpy(paging->data,
3478 trans->init_dram.paging[i].block, page_len);
3479 data = iwl_fw_error_next_data(data);
3480
3481 len += sizeof(*data) + sizeof(*paging) + page_len;
3482 }
3483 }
3484 if (dump_mask & BIT(IWL_FW_ERROR_DUMP_FW_MONITOR))
3485 len += iwl_trans_pcie_dump_monitor(trans, &data, monitor_len);
3486
3487 dump_data->len = len;
3488
3489 return dump_data;
3490}
3491
3492static void iwl_trans_pci_interrupts(struct iwl_trans *trans, bool enable)
3493{
3494 if (enable)
3495 iwl_enable_interrupts(trans);
3496 else
3497 iwl_disable_interrupts(trans);
3498}
3499
3500static void iwl_trans_pcie_sync_nmi(struct iwl_trans *trans)
3501{
3502 u32 inta_addr, sw_err_bit;
3503 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
3504
3505 if (trans_pcie->msix_enabled) {
3506 inta_addr = CSR_MSIX_HW_INT_CAUSES_AD;
3507 if (trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_BZ)
3508 sw_err_bit = MSIX_HW_INT_CAUSES_REG_SW_ERR_BZ;
3509 else
3510 sw_err_bit = MSIX_HW_INT_CAUSES_REG_SW_ERR;
3511 } else {
3512 inta_addr = CSR_INT;
3513 sw_err_bit = CSR_INT_BIT_SW_ERR;
3514 }
3515
3516 iwl_trans_sync_nmi_with_addr(trans, inta_addr, sw_err_bit);
3517}
3518
3519#define IWL_TRANS_COMMON_OPS \
3520 .op_mode_leave = iwl_trans_pcie_op_mode_leave, \
3521 .write8 = iwl_trans_pcie_write8, \
3522 .write32 = iwl_trans_pcie_write32, \
3523 .read32 = iwl_trans_pcie_read32, \
3524 .read_prph = iwl_trans_pcie_read_prph, \
3525 .write_prph = iwl_trans_pcie_write_prph, \
3526 .read_mem = iwl_trans_pcie_read_mem, \
3527 .write_mem = iwl_trans_pcie_write_mem, \
3528 .read_config32 = iwl_trans_pcie_read_config32, \
3529 .configure = iwl_trans_pcie_configure, \
3530 .set_pmi = iwl_trans_pcie_set_pmi, \
3531 .sw_reset = iwl_trans_pcie_sw_reset, \
3532 .grab_nic_access = iwl_trans_pcie_grab_nic_access, \
3533 .release_nic_access = iwl_trans_pcie_release_nic_access, \
3534 .set_bits_mask = iwl_trans_pcie_set_bits_mask, \
3535 .dump_data = iwl_trans_pcie_dump_data, \
3536 .d3_suspend = iwl_trans_pcie_d3_suspend, \
3537 .d3_resume = iwl_trans_pcie_d3_resume, \
3538 .interrupts = iwl_trans_pci_interrupts, \
3539 .sync_nmi = iwl_trans_pcie_sync_nmi, \
3540 .imr_dma_data = iwl_trans_pcie_copy_imr \
3541
3542static const struct iwl_trans_ops trans_ops_pcie = {
3543 IWL_TRANS_COMMON_OPS,
3544 .start_hw = iwl_trans_pcie_start_hw,
3545 .fw_alive = iwl_trans_pcie_fw_alive,
3546 .start_fw = iwl_trans_pcie_start_fw,
3547 .stop_device = iwl_trans_pcie_stop_device,
3548
3549 .send_cmd = iwl_pcie_enqueue_hcmd,
3550
3551 .tx = iwl_trans_pcie_tx,
3552 .reclaim = iwl_txq_reclaim,
3553
3554 .txq_disable = iwl_trans_pcie_txq_disable,
3555 .txq_enable = iwl_trans_pcie_txq_enable,
3556
3557 .txq_set_shared_mode = iwl_trans_pcie_txq_set_shared_mode,
3558
3559 .wait_tx_queues_empty = iwl_trans_pcie_wait_txqs_empty,
3560
3561 .freeze_txq_timer = iwl_trans_txq_freeze_timer,
3562#ifdef CONFIG_IWLWIFI_DEBUGFS
3563 .debugfs_cleanup = iwl_trans_pcie_debugfs_cleanup,
3564#endif
3565};
3566
3567static const struct iwl_trans_ops trans_ops_pcie_gen2 = {
3568 IWL_TRANS_COMMON_OPS,
3569 .start_hw = iwl_trans_pcie_start_hw,
3570 .fw_alive = iwl_trans_pcie_gen2_fw_alive,
3571 .start_fw = iwl_trans_pcie_gen2_start_fw,
3572 .stop_device = iwl_trans_pcie_gen2_stop_device,
3573
3574 .send_cmd = iwl_pcie_gen2_enqueue_hcmd,
3575
3576 .tx = iwl_txq_gen2_tx,
3577 .reclaim = iwl_txq_reclaim,
3578
3579 .set_q_ptrs = iwl_txq_set_q_ptrs,
3580
3581 .txq_alloc = iwl_txq_dyn_alloc,
3582 .txq_free = iwl_txq_dyn_free,
3583 .wait_txq_empty = iwl_trans_pcie_wait_txq_empty,
3584 .rxq_dma_data = iwl_trans_pcie_rxq_dma_data,
3585 .load_pnvm = iwl_trans_pcie_ctx_info_gen3_load_pnvm,
3586 .set_pnvm = iwl_trans_pcie_ctx_info_gen3_set_pnvm,
3587 .load_reduce_power = iwl_trans_pcie_ctx_info_gen3_load_reduce_power,
3588 .set_reduce_power = iwl_trans_pcie_ctx_info_gen3_set_reduce_power,
3589#ifdef CONFIG_IWLWIFI_DEBUGFS
3590 .debugfs_cleanup = iwl_trans_pcie_debugfs_cleanup,
3591#endif
3592};
3593
3594struct iwl_trans *iwl_trans_pcie_alloc(struct pci_dev *pdev,
3595 const struct pci_device_id *ent,
3596 const struct iwl_cfg_trans_params *cfg_trans)
3597{
3598 struct iwl_trans_pcie *trans_pcie;
3599 struct iwl_trans *trans;
3600 int ret, addr_size;
3601 const struct iwl_trans_ops *ops = &trans_ops_pcie_gen2;
3602 void __iomem * const *table;
3603 u32 bar0;
3604
3605 if (!cfg_trans->gen2)
3606 ops = &trans_ops_pcie;
3607
3608 /* reassign our BAR 0 if invalid due to possible runtime PM races */
3609 pci_read_config_dword(pdev, PCI_BASE_ADDRESS_0, &bar0);
3610 if (bar0 == PCI_BASE_ADDRESS_MEM_TYPE_64) {
3611 ret = pci_assign_resource(pdev, 0);
3612 if (ret)
3613 return ERR_PTR(ret);
3614 }
3615
3616 ret = pcim_enable_device(pdev);
3617 if (ret)
3618 return ERR_PTR(ret);
3619
3620 trans = iwl_trans_alloc(sizeof(struct iwl_trans_pcie), &pdev->dev, ops,
3621 cfg_trans);
3622 if (!trans)
3623 return ERR_PTR(-ENOMEM);
3624
3625 trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
3626
3627 trans_pcie->trans = trans;
3628 trans_pcie->opmode_down = true;
3629 spin_lock_init(&trans_pcie->irq_lock);
3630 spin_lock_init(&trans_pcie->reg_lock);
3631 spin_lock_init(&trans_pcie->alloc_page_lock);
3632 mutex_init(&trans_pcie->mutex);
3633 init_waitqueue_head(&trans_pcie->ucode_write_waitq);
3634 init_waitqueue_head(&trans_pcie->fw_reset_waitq);
3635 init_waitqueue_head(&trans_pcie->imr_waitq);
3636
3637 trans_pcie->rba.alloc_wq = alloc_workqueue("rb_allocator",
3638 WQ_HIGHPRI | WQ_UNBOUND, 0);
3639 if (!trans_pcie->rba.alloc_wq) {
3640 ret = -ENOMEM;
3641 goto out_free_trans;
3642 }
3643 INIT_WORK(&trans_pcie->rba.rx_alloc, iwl_pcie_rx_allocator_work);
3644
3645 trans_pcie->debug_rfkill = -1;
3646
3647 if (!cfg_trans->base_params->pcie_l1_allowed) {
3648 /*
3649 * W/A - seems to solve weird behavior. We need to remove this
3650 * if we don't want to stay in L1 all the time. This wastes a
3651 * lot of power.
3652 */
3653 pci_disable_link_state(pdev, PCIE_LINK_STATE_L0S |
3654 PCIE_LINK_STATE_L1 |
3655 PCIE_LINK_STATE_CLKPM);
3656 }
3657
3658 pci_set_master(pdev);
3659
3660 addr_size = trans->txqs.tfd.addr_size;
3661 ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(addr_size));
3662 if (ret) {
3663 ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
3664 /* both attempts failed: */
3665 if (ret) {
3666 dev_err(&pdev->dev, "No suitable DMA available\n");
3667 goto out_no_pci;
3668 }
3669 }
3670
3671 ret = pcim_iomap_regions_request_all(pdev, BIT(0), DRV_NAME);
3672 if (ret) {
3673 dev_err(&pdev->dev, "pcim_iomap_regions_request_all failed\n");
3674 goto out_no_pci;
3675 }
3676
3677 table = pcim_iomap_table(pdev);
3678 if (!table) {
3679 dev_err(&pdev->dev, "pcim_iomap_table failed\n");
3680 ret = -ENOMEM;
3681 goto out_no_pci;
3682 }
3683
3684 trans_pcie->hw_base = table[0];
3685 if (!trans_pcie->hw_base) {
3686 dev_err(&pdev->dev, "couldn't find IO mem in first BAR\n");
3687 ret = -ENODEV;
3688 goto out_no_pci;
3689 }
3690
3691 /* We disable the RETRY_TIMEOUT register (0x41) to keep
3692 * PCI Tx retries from interfering with C3 CPU state */
3693 pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
3694
3695 trans_pcie->pci_dev = pdev;
3696 iwl_disable_interrupts(trans);
3697
3698 trans->hw_rev = iwl_read32(trans, CSR_HW_REV);
3699 if (trans->hw_rev == 0xffffffff) {
3700 dev_err(&pdev->dev, "HW_REV=0xFFFFFFFF, PCI issues?\n");
3701 ret = -EIO;
3702 goto out_no_pci;
3703 }
3704
3705 /*
3706 * In the 8000 HW family the format of the 4 bytes of CSR_HW_REV have
3707 * changed, and now the revision step also includes bit 0-1 (no more
3708 * "dash" value). To keep hw_rev backwards compatible - we'll store it
3709 * in the old format.
3710 */
3711 if (cfg_trans->device_family >= IWL_DEVICE_FAMILY_8000)
3712 trans->hw_rev_step = trans->hw_rev & 0xF;
3713 else
3714 trans->hw_rev_step = (trans->hw_rev & 0xC) >> 2;
3715
3716 IWL_DEBUG_INFO(trans, "HW REV: 0x%0x\n", trans->hw_rev);
3717
3718 iwl_pcie_set_interrupt_capa(pdev, trans, cfg_trans);
3719 trans->hw_id = (pdev->device << 16) + pdev->subsystem_device;
3720 snprintf(trans->hw_id_str, sizeof(trans->hw_id_str),
3721 "PCI ID: 0x%04X:0x%04X", pdev->device, pdev->subsystem_device);
3722
3723 init_waitqueue_head(&trans_pcie->sx_waitq);
3724
3725 ret = iwl_pcie_alloc_invalid_tx_cmd(trans);
3726 if (ret)
3727 goto out_no_pci;
3728
3729 if (trans_pcie->msix_enabled) {
3730 ret = iwl_pcie_init_msix_handler(pdev, trans_pcie);
3731 if (ret)
3732 goto out_no_pci;
3733 } else {
3734 ret = iwl_pcie_alloc_ict(trans);
3735 if (ret)
3736 goto out_no_pci;
3737
3738 ret = devm_request_threaded_irq(&pdev->dev, pdev->irq,
3739 iwl_pcie_isr,
3740 iwl_pcie_irq_handler,
3741 IRQF_SHARED, DRV_NAME, trans);
3742 if (ret) {
3743 IWL_ERR(trans, "Error allocating IRQ %d\n", pdev->irq);
3744 goto out_free_ict;
3745 }
3746 }
3747
3748#ifdef CONFIG_IWLWIFI_DEBUGFS
3749 trans_pcie->fw_mon_data.state = IWL_FW_MON_DBGFS_STATE_CLOSED;
3750 mutex_init(&trans_pcie->fw_mon_data.mutex);
3751#endif
3752
3753 iwl_dbg_tlv_init(trans);
3754
3755 return trans;
3756
3757out_free_ict:
3758 iwl_pcie_free_ict(trans);
3759out_no_pci:
3760 destroy_workqueue(trans_pcie->rba.alloc_wq);
3761out_free_trans:
3762 iwl_trans_free(trans);
3763 return ERR_PTR(ret);
3764}
3765
3766void iwl_trans_pcie_copy_imr_fh(struct iwl_trans *trans,
3767 u32 dst_addr, u64 src_addr, u32 byte_cnt)
3768{
3769 iwl_write_prph(trans, IMR_UREG_CHICK,
3770 iwl_read_prph(trans, IMR_UREG_CHICK) |
3771 IMR_UREG_CHICK_HALT_UMAC_PERMANENTLY_MSK);
3772 iwl_write_prph(trans, IMR_TFH_SRV_DMA_CHNL0_SRAM_ADDR, dst_addr);
3773 iwl_write_prph(trans, IMR_TFH_SRV_DMA_CHNL0_DRAM_ADDR_LSB,
3774 (u32)(src_addr & 0xFFFFFFFF));
3775 iwl_write_prph(trans, IMR_TFH_SRV_DMA_CHNL0_DRAM_ADDR_MSB,
3776 iwl_get_dma_hi_addr(src_addr));
3777 iwl_write_prph(trans, IMR_TFH_SRV_DMA_CHNL0_BC, byte_cnt);
3778 iwl_write_prph(trans, IMR_TFH_SRV_DMA_CHNL0_CTRL,
3779 IMR_TFH_SRV_DMA_CHNL0_CTRL_D2S_IRQ_TARGET_POS |
3780 IMR_TFH_SRV_DMA_CHNL0_CTRL_D2S_DMA_EN_POS |
3781 IMR_TFH_SRV_DMA_CHNL0_CTRL_D2S_RS_MSK);
3782}
3783
3784int iwl_trans_pcie_copy_imr(struct iwl_trans *trans,
3785 u32 dst_addr, u64 src_addr, u32 byte_cnt)
3786{
3787 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
3788 int ret = -1;
3789
3790 trans_pcie->imr_status = IMR_D2S_REQUESTED;
3791 iwl_trans_pcie_copy_imr_fh(trans, dst_addr, src_addr, byte_cnt);
3792 ret = wait_event_timeout(trans_pcie->imr_waitq,
3793 trans_pcie->imr_status !=
3794 IMR_D2S_REQUESTED, 5 * HZ);
3795 if (!ret || trans_pcie->imr_status == IMR_D2S_ERROR) {
3796 IWL_ERR(trans, "Failed to copy IMR Memory chunk!\n");
3797 iwl_trans_pcie_dump_regs(trans);
3798 return -ETIMEDOUT;
3799 }
3800 trans_pcie->imr_status = IMR_D2S_IDLE;
3801 return 0;
3802}
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
91static void iwl_trans_pcie_dump_regs(struct iwl_trans *trans)
92{
93#define PCI_DUMP_SIZE 64
94#define PREFIX_LEN 32
95 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
96 struct pci_dev *pdev = trans_pcie->pci_dev;
97 u32 i, pos, alloc_size, *ptr, *buf;
98 char *prefix;
99
100 if (trans_pcie->pcie_dbg_dumped_once)
101 return;
102
103 /* Should be a multiple of 4 */
104 BUILD_BUG_ON(PCI_DUMP_SIZE > 4096 || PCI_DUMP_SIZE & 0x3);
105 /* Alloc a max size buffer */
106 if (PCI_ERR_ROOT_ERR_SRC + 4 > PCI_DUMP_SIZE)
107 alloc_size = PCI_ERR_ROOT_ERR_SRC + 4 + PREFIX_LEN;
108 else
109 alloc_size = PCI_DUMP_SIZE + PREFIX_LEN;
110 buf = kmalloc(alloc_size, GFP_ATOMIC);
111 if (!buf)
112 return;
113 prefix = (char *)buf + alloc_size - PREFIX_LEN;
114
115 IWL_ERR(trans, "iwlwifi transaction failed, dumping registers\n");
116
117 /* Print wifi device registers */
118 sprintf(prefix, "iwlwifi %s: ", pci_name(pdev));
119 IWL_ERR(trans, "iwlwifi device config registers:\n");
120 for (i = 0, ptr = buf; i < PCI_DUMP_SIZE; i += 4, ptr++)
121 if (pci_read_config_dword(pdev, i, ptr))
122 goto err_read;
123 print_hex_dump(KERN_ERR, prefix, DUMP_PREFIX_OFFSET, 32, 4, buf, i, 0);
124
125 IWL_ERR(trans, "iwlwifi device memory mapped registers:\n");
126 for (i = 0, ptr = buf; i < PCI_DUMP_SIZE; i += 4, ptr++)
127 *ptr = iwl_read32(trans, i);
128 print_hex_dump(KERN_ERR, prefix, DUMP_PREFIX_OFFSET, 32, 4, buf, i, 0);
129
130 pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_ERR);
131 if (pos) {
132 IWL_ERR(trans, "iwlwifi device AER capability structure:\n");
133 for (i = 0, ptr = buf; i < PCI_ERR_ROOT_COMMAND; i += 4, ptr++)
134 if (pci_read_config_dword(pdev, pos + i, ptr))
135 goto err_read;
136 print_hex_dump(KERN_ERR, prefix, DUMP_PREFIX_OFFSET,
137 32, 4, buf, i, 0);
138 }
139
140 /* Print parent device registers next */
141 if (!pdev->bus->self)
142 goto out;
143
144 pdev = pdev->bus->self;
145 sprintf(prefix, "iwlwifi %s: ", pci_name(pdev));
146
147 IWL_ERR(trans, "iwlwifi parent port (%s) config registers:\n",
148 pci_name(pdev));
149 for (i = 0, ptr = buf; i < PCI_DUMP_SIZE; i += 4, ptr++)
150 if (pci_read_config_dword(pdev, i, ptr))
151 goto err_read;
152 print_hex_dump(KERN_ERR, prefix, DUMP_PREFIX_OFFSET, 32, 4, buf, i, 0);
153
154 /* Print root port AER registers */
155 pos = 0;
156 pdev = pcie_find_root_port(pdev);
157 if (pdev)
158 pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_ERR);
159 if (pos) {
160 IWL_ERR(trans, "iwlwifi root port (%s) AER cap structure:\n",
161 pci_name(pdev));
162 sprintf(prefix, "iwlwifi %s: ", pci_name(pdev));
163 for (i = 0, ptr = buf; i <= PCI_ERR_ROOT_ERR_SRC; i += 4, ptr++)
164 if (pci_read_config_dword(pdev, pos + i, ptr))
165 goto err_read;
166 print_hex_dump(KERN_ERR, prefix, DUMP_PREFIX_OFFSET, 32,
167 4, buf, i, 0);
168 }
169 goto out;
170
171err_read:
172 print_hex_dump(KERN_ERR, prefix, DUMP_PREFIX_OFFSET, 32, 4, buf, i, 0);
173 IWL_ERR(trans, "Read failed at 0x%X\n", i);
174out:
175 trans_pcie->pcie_dbg_dumped_once = 1;
176 kfree(buf);
177}
178
179static void iwl_trans_pcie_sw_reset(struct iwl_trans *trans)
180{
181 /* Reset entire device - do controller reset (results in SHRD_HW_RST) */
182 iwl_set_bit(trans, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
183 usleep_range(5000, 6000);
184}
185
186static void iwl_pcie_free_fw_monitor(struct iwl_trans *trans)
187{
188 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
189
190 if (!trans_pcie->fw_mon_page)
191 return;
192
193 dma_unmap_page(trans->dev, trans_pcie->fw_mon_phys,
194 trans_pcie->fw_mon_size, DMA_FROM_DEVICE);
195 __free_pages(trans_pcie->fw_mon_page,
196 get_order(trans_pcie->fw_mon_size));
197 trans_pcie->fw_mon_page = NULL;
198 trans_pcie->fw_mon_phys = 0;
199 trans_pcie->fw_mon_size = 0;
200}
201
202static void iwl_pcie_alloc_fw_monitor(struct iwl_trans *trans, u8 max_power)
203{
204 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
205 struct page *page = NULL;
206 dma_addr_t phys;
207 u32 size = 0;
208 u8 power;
209
210 if (!max_power) {
211 /* default max_power is maximum */
212 max_power = 26;
213 } else {
214 max_power += 11;
215 }
216
217 if (WARN(max_power > 26,
218 "External buffer size for monitor is too big %d, check the FW TLV\n",
219 max_power))
220 return;
221
222 if (trans_pcie->fw_mon_page) {
223 dma_sync_single_for_device(trans->dev, trans_pcie->fw_mon_phys,
224 trans_pcie->fw_mon_size,
225 DMA_FROM_DEVICE);
226 return;
227 }
228
229 phys = 0;
230 for (power = max_power; power >= 11; power--) {
231 int order;
232
233 size = BIT(power);
234 order = get_order(size);
235 page = alloc_pages(__GFP_COMP | __GFP_NOWARN | __GFP_ZERO,
236 order);
237 if (!page)
238 continue;
239
240 phys = dma_map_page(trans->dev, page, 0, PAGE_SIZE << order,
241 DMA_FROM_DEVICE);
242 if (dma_mapping_error(trans->dev, phys)) {
243 __free_pages(page, order);
244 page = NULL;
245 continue;
246 }
247 IWL_INFO(trans,
248 "Allocated 0x%08x bytes (order %d) for firmware monitor.\n",
249 size, order);
250 break;
251 }
252
253 if (WARN_ON_ONCE(!page))
254 return;
255
256 if (power != max_power)
257 IWL_ERR(trans,
258 "Sorry - debug buffer is only %luK while you requested %luK\n",
259 (unsigned long)BIT(power - 10),
260 (unsigned long)BIT(max_power - 10));
261
262 trans_pcie->fw_mon_page = page;
263 trans_pcie->fw_mon_phys = phys;
264 trans_pcie->fw_mon_size = size;
265}
266
267static u32 iwl_trans_pcie_read_shr(struct iwl_trans *trans, u32 reg)
268{
269 iwl_write32(trans, HEEP_CTRL_WRD_PCIEX_CTRL_REG,
270 ((reg & 0x0000ffff) | (2 << 28)));
271 return iwl_read32(trans, HEEP_CTRL_WRD_PCIEX_DATA_REG);
272}
273
274static void iwl_trans_pcie_write_shr(struct iwl_trans *trans, u32 reg, u32 val)
275{
276 iwl_write32(trans, HEEP_CTRL_WRD_PCIEX_DATA_REG, val);
277 iwl_write32(trans, HEEP_CTRL_WRD_PCIEX_CTRL_REG,
278 ((reg & 0x0000ffff) | (3 << 28)));
279}
280
281static void iwl_pcie_set_pwr(struct iwl_trans *trans, bool vaux)
282{
283 if (trans->cfg->apmg_not_supported)
284 return;
285
286 if (vaux && pci_pme_capable(to_pci_dev(trans->dev), PCI_D3cold))
287 iwl_set_bits_mask_prph(trans, APMG_PS_CTRL_REG,
288 APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
289 ~APMG_PS_CTRL_MSK_PWR_SRC);
290 else
291 iwl_set_bits_mask_prph(trans, APMG_PS_CTRL_REG,
292 APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
293 ~APMG_PS_CTRL_MSK_PWR_SRC);
294}
295
296/* PCI registers */
297#define PCI_CFG_RETRY_TIMEOUT 0x041
298
299void iwl_pcie_apm_config(struct iwl_trans *trans)
300{
301 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
302 u16 lctl;
303 u16 cap;
304
305 /*
306 * HW bug W/A for instability in PCIe bus L0S->L1 transition.
307 * Check if BIOS (or OS) enabled L1-ASPM on this device.
308 * If so (likely), disable L0S, so device moves directly L0->L1;
309 * costs negligible amount of power savings.
310 * If not (unlikely), enable L0S, so there is at least some
311 * power savings, even without L1.
312 */
313 pcie_capability_read_word(trans_pcie->pci_dev, PCI_EXP_LNKCTL, &lctl);
314 if (lctl & PCI_EXP_LNKCTL_ASPM_L1)
315 iwl_set_bit(trans, CSR_GIO_REG, CSR_GIO_REG_VAL_L0S_ENABLED);
316 else
317 iwl_clear_bit(trans, CSR_GIO_REG, CSR_GIO_REG_VAL_L0S_ENABLED);
318 trans->pm_support = !(lctl & PCI_EXP_LNKCTL_ASPM_L0S);
319
320 pcie_capability_read_word(trans_pcie->pci_dev, PCI_EXP_DEVCTL2, &cap);
321 trans->ltr_enabled = cap & PCI_EXP_DEVCTL2_LTR_EN;
322 IWL_DEBUG_POWER(trans, "L1 %sabled - LTR %sabled\n",
323 (lctl & PCI_EXP_LNKCTL_ASPM_L1) ? "En" : "Dis",
324 trans->ltr_enabled ? "En" : "Dis");
325}
326
327/*
328 * Start up NIC's basic functionality after it has been reset
329 * (e.g. after platform boot, or shutdown via iwl_pcie_apm_stop())
330 * NOTE: This does not load uCode nor start the embedded processor
331 */
332static int iwl_pcie_apm_init(struct iwl_trans *trans)
333{
334 int ret;
335
336 IWL_DEBUG_INFO(trans, "Init card's basic functions\n");
337
338 /*
339 * Use "set_bit" below rather than "write", to preserve any hardware
340 * bits already set by default after reset.
341 */
342
343 /* Disable L0S exit timer (platform NMI Work/Around) */
344 if (trans->cfg->device_family < IWL_DEVICE_FAMILY_8000)
345 iwl_set_bit(trans, CSR_GIO_CHICKEN_BITS,
346 CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
347
348 /*
349 * Disable L0s without affecting L1;
350 * don't wait for ICH L0s (ICH bug W/A)
351 */
352 iwl_set_bit(trans, CSR_GIO_CHICKEN_BITS,
353 CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
354
355 /* Set FH wait threshold to maximum (HW error during stress W/A) */
356 iwl_set_bit(trans, CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL);
357
358 /*
359 * Enable HAP INTA (interrupt from management bus) to
360 * wake device's PCI Express link L1a -> L0s
361 */
362 iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG,
363 CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
364
365 iwl_pcie_apm_config(trans);
366
367 /* Configure analog phase-lock-loop before activating to D0A */
368 if (trans->cfg->base_params->pll_cfg)
369 iwl_set_bit(trans, CSR_ANA_PLL_CFG, CSR50_ANA_PLL_CFG_VAL);
370
371 /*
372 * Set "initialization complete" bit to move adapter from
373 * D0U* --> D0A* (powered-up active) state.
374 */
375 iwl_set_bit(trans, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
376
377 /*
378 * Wait for clock stabilization; once stabilized, access to
379 * device-internal resources is supported, e.g. iwl_write_prph()
380 * and accesses to uCode SRAM.
381 */
382 ret = iwl_poll_bit(trans, CSR_GP_CNTRL,
383 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
384 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
385 if (ret < 0) {
386 IWL_ERR(trans, "Failed to init the card\n");
387 return ret;
388 }
389
390 if (trans->cfg->host_interrupt_operation_mode) {
391 /*
392 * This is a bit of an abuse - This is needed for 7260 / 3160
393 * only check host_interrupt_operation_mode even if this is
394 * not related to host_interrupt_operation_mode.
395 *
396 * Enable the oscillator to count wake up time for L1 exit. This
397 * consumes slightly more power (100uA) - but allows to be sure
398 * that we wake up from L1 on time.
399 *
400 * This looks weird: read twice the same register, discard the
401 * value, set a bit, and yet again, read that same register
402 * just to discard the value. But that's the way the hardware
403 * seems to like it.
404 */
405 iwl_read_prph(trans, OSC_CLK);
406 iwl_read_prph(trans, OSC_CLK);
407 iwl_set_bits_prph(trans, OSC_CLK, OSC_CLK_FORCE_CONTROL);
408 iwl_read_prph(trans, OSC_CLK);
409 iwl_read_prph(trans, OSC_CLK);
410 }
411
412 /*
413 * Enable DMA clock and wait for it to stabilize.
414 *
415 * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0"
416 * bits do not disable clocks. This preserves any hardware
417 * bits already set by default in "CLK_CTRL_REG" after reset.
418 */
419 if (!trans->cfg->apmg_not_supported) {
420 iwl_write_prph(trans, APMG_CLK_EN_REG,
421 APMG_CLK_VAL_DMA_CLK_RQT);
422 udelay(20);
423
424 /* Disable L1-Active */
425 iwl_set_bits_prph(trans, APMG_PCIDEV_STT_REG,
426 APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
427
428 /* Clear the interrupt in APMG if the NIC is in RFKILL */
429 iwl_write_prph(trans, APMG_RTC_INT_STT_REG,
430 APMG_RTC_INT_STT_RFKILL);
431 }
432
433 set_bit(STATUS_DEVICE_ENABLED, &trans->status);
434
435 return 0;
436}
437
438/*
439 * Enable LP XTAL to avoid HW bug where device may consume much power if
440 * FW is not loaded after device reset. LP XTAL is disabled by default
441 * after device HW reset. Do it only if XTAL is fed by internal source.
442 * Configure device's "persistence" mode to avoid resetting XTAL again when
443 * SHRD_HW_RST occurs in S3.
444 */
445static void iwl_pcie_apm_lp_xtal_enable(struct iwl_trans *trans)
446{
447 int ret;
448 u32 apmg_gp1_reg;
449 u32 apmg_xtal_cfg_reg;
450 u32 dl_cfg_reg;
451
452 /* Force XTAL ON */
453 __iwl_trans_pcie_set_bit(trans, CSR_GP_CNTRL,
454 CSR_GP_CNTRL_REG_FLAG_XTAL_ON);
455
456 iwl_trans_pcie_sw_reset(trans);
457
458 /*
459 * Set "initialization complete" bit to move adapter from
460 * D0U* --> D0A* (powered-up active) state.
461 */
462 iwl_set_bit(trans, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
463
464 /*
465 * Wait for clock stabilization; once stabilized, access to
466 * device-internal resources is possible.
467 */
468 ret = iwl_poll_bit(trans, CSR_GP_CNTRL,
469 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
470 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
471 25000);
472 if (WARN_ON(ret < 0)) {
473 IWL_ERR(trans, "Access time out - failed to enable LP XTAL\n");
474 /* Release XTAL ON request */
475 __iwl_trans_pcie_clear_bit(trans, CSR_GP_CNTRL,
476 CSR_GP_CNTRL_REG_FLAG_XTAL_ON);
477 return;
478 }
479
480 /*
481 * Clear "disable persistence" to avoid LP XTAL resetting when
482 * SHRD_HW_RST is applied in S3.
483 */
484 iwl_clear_bits_prph(trans, APMG_PCIDEV_STT_REG,
485 APMG_PCIDEV_STT_VAL_PERSIST_DIS);
486
487 /*
488 * Force APMG XTAL to be active to prevent its disabling by HW
489 * caused by APMG idle state.
490 */
491 apmg_xtal_cfg_reg = iwl_trans_pcie_read_shr(trans,
492 SHR_APMG_XTAL_CFG_REG);
493 iwl_trans_pcie_write_shr(trans, SHR_APMG_XTAL_CFG_REG,
494 apmg_xtal_cfg_reg |
495 SHR_APMG_XTAL_CFG_XTAL_ON_REQ);
496
497 iwl_trans_pcie_sw_reset(trans);
498
499 /* Enable LP XTAL by indirect access through CSR */
500 apmg_gp1_reg = iwl_trans_pcie_read_shr(trans, SHR_APMG_GP1_REG);
501 iwl_trans_pcie_write_shr(trans, SHR_APMG_GP1_REG, apmg_gp1_reg |
502 SHR_APMG_GP1_WF_XTAL_LP_EN |
503 SHR_APMG_GP1_CHICKEN_BIT_SELECT);
504
505 /* Clear delay line clock power up */
506 dl_cfg_reg = iwl_trans_pcie_read_shr(trans, SHR_APMG_DL_CFG_REG);
507 iwl_trans_pcie_write_shr(trans, SHR_APMG_DL_CFG_REG, dl_cfg_reg &
508 ~SHR_APMG_DL_CFG_DL_CLOCK_POWER_UP);
509
510 /*
511 * Enable persistence mode to avoid LP XTAL resetting when
512 * SHRD_HW_RST is applied in S3.
513 */
514 iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG,
515 CSR_HW_IF_CONFIG_REG_PERSIST_MODE);
516
517 /*
518 * Clear "initialization complete" bit to move adapter from
519 * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
520 */
521 iwl_clear_bit(trans, CSR_GP_CNTRL,
522 CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
523
524 /* Activates XTAL resources monitor */
525 __iwl_trans_pcie_set_bit(trans, CSR_MONITOR_CFG_REG,
526 CSR_MONITOR_XTAL_RESOURCES);
527
528 /* Release XTAL ON request */
529 __iwl_trans_pcie_clear_bit(trans, CSR_GP_CNTRL,
530 CSR_GP_CNTRL_REG_FLAG_XTAL_ON);
531 udelay(10);
532
533 /* Release APMG XTAL */
534 iwl_trans_pcie_write_shr(trans, SHR_APMG_XTAL_CFG_REG,
535 apmg_xtal_cfg_reg &
536 ~SHR_APMG_XTAL_CFG_XTAL_ON_REQ);
537}
538
539void iwl_pcie_apm_stop_master(struct iwl_trans *trans)
540{
541 int ret;
542
543 /* stop device's busmaster DMA activity */
544 iwl_set_bit(trans, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
545
546 ret = iwl_poll_bit(trans, CSR_RESET,
547 CSR_RESET_REG_FLAG_MASTER_DISABLED,
548 CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
549 if (ret < 0)
550 IWL_WARN(trans, "Master Disable Timed Out, 100 usec\n");
551
552 IWL_DEBUG_INFO(trans, "stop master\n");
553}
554
555static void iwl_pcie_apm_stop(struct iwl_trans *trans, bool op_mode_leave)
556{
557 IWL_DEBUG_INFO(trans, "Stop card, put in low power state\n");
558
559 if (op_mode_leave) {
560 if (!test_bit(STATUS_DEVICE_ENABLED, &trans->status))
561 iwl_pcie_apm_init(trans);
562
563 /* inform ME that we are leaving */
564 if (trans->cfg->device_family == IWL_DEVICE_FAMILY_7000)
565 iwl_set_bits_prph(trans, APMG_PCIDEV_STT_REG,
566 APMG_PCIDEV_STT_VAL_WAKE_ME);
567 else if (trans->cfg->device_family >= IWL_DEVICE_FAMILY_8000) {
568 iwl_set_bit(trans, CSR_DBG_LINK_PWR_MGMT_REG,
569 CSR_RESET_LINK_PWR_MGMT_DISABLED);
570 iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG,
571 CSR_HW_IF_CONFIG_REG_PREPARE |
572 CSR_HW_IF_CONFIG_REG_ENABLE_PME);
573 mdelay(1);
574 iwl_clear_bit(trans, CSR_DBG_LINK_PWR_MGMT_REG,
575 CSR_RESET_LINK_PWR_MGMT_DISABLED);
576 }
577 mdelay(5);
578 }
579
580 clear_bit(STATUS_DEVICE_ENABLED, &trans->status);
581
582 /* Stop device's DMA activity */
583 iwl_pcie_apm_stop_master(trans);
584
585 if (trans->cfg->lp_xtal_workaround) {
586 iwl_pcie_apm_lp_xtal_enable(trans);
587 return;
588 }
589
590 iwl_trans_pcie_sw_reset(trans);
591
592 /*
593 * Clear "initialization complete" bit to move adapter from
594 * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
595 */
596 iwl_clear_bit(trans, CSR_GP_CNTRL,
597 CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
598}
599
600static int iwl_pcie_nic_init(struct iwl_trans *trans)
601{
602 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
603 int ret;
604
605 /* nic_init */
606 spin_lock(&trans_pcie->irq_lock);
607 ret = iwl_pcie_apm_init(trans);
608 spin_unlock(&trans_pcie->irq_lock);
609
610 if (ret)
611 return ret;
612
613 iwl_pcie_set_pwr(trans, false);
614
615 iwl_op_mode_nic_config(trans->op_mode);
616
617 /* Allocate the RX queue, or reset if it is already allocated */
618 iwl_pcie_rx_init(trans);
619
620 /* Allocate or reset and init all Tx and Command queues */
621 if (iwl_pcie_tx_init(trans))
622 return -ENOMEM;
623
624 if (trans->cfg->base_params->shadow_reg_enable) {
625 /* enable shadow regs in HW */
626 iwl_set_bit(trans, CSR_MAC_SHADOW_REG_CTRL, 0x800FFFFF);
627 IWL_DEBUG_INFO(trans, "Enabling shadow registers in device\n");
628 }
629
630 return 0;
631}
632
633#define HW_READY_TIMEOUT (50)
634
635/* Note: returns poll_bit return value, which is >= 0 if success */
636static int iwl_pcie_set_hw_ready(struct iwl_trans *trans)
637{
638 int ret;
639
640 iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG,
641 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY);
642
643 /* See if we got it */
644 ret = iwl_poll_bit(trans, CSR_HW_IF_CONFIG_REG,
645 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
646 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
647 HW_READY_TIMEOUT);
648
649 if (ret >= 0)
650 iwl_set_bit(trans, CSR_MBOX_SET_REG, CSR_MBOX_SET_REG_OS_ALIVE);
651
652 IWL_DEBUG_INFO(trans, "hardware%s ready\n", ret < 0 ? " not" : "");
653 return ret;
654}
655
656/* Note: returns standard 0/-ERROR code */
657int iwl_pcie_prepare_card_hw(struct iwl_trans *trans)
658{
659 int ret;
660 int t = 0;
661 int iter;
662
663 IWL_DEBUG_INFO(trans, "iwl_trans_prepare_card_hw enter\n");
664
665 ret = iwl_pcie_set_hw_ready(trans);
666 /* If the card is ready, exit 0 */
667 if (ret >= 0)
668 return 0;
669
670 iwl_set_bit(trans, CSR_DBG_LINK_PWR_MGMT_REG,
671 CSR_RESET_LINK_PWR_MGMT_DISABLED);
672 usleep_range(1000, 2000);
673
674 for (iter = 0; iter < 10; iter++) {
675 /* If HW is not ready, prepare the conditions to check again */
676 iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG,
677 CSR_HW_IF_CONFIG_REG_PREPARE);
678
679 do {
680 ret = iwl_pcie_set_hw_ready(trans);
681 if (ret >= 0)
682 return 0;
683
684 usleep_range(200, 1000);
685 t += 200;
686 } while (t < 150000);
687 msleep(25);
688 }
689
690 IWL_ERR(trans, "Couldn't prepare the card\n");
691
692 return ret;
693}
694
695/*
696 * ucode
697 */
698static void iwl_pcie_load_firmware_chunk_fh(struct iwl_trans *trans,
699 u32 dst_addr, dma_addr_t phy_addr,
700 u32 byte_cnt)
701{
702 iwl_write32(trans, FH_TCSR_CHNL_TX_CONFIG_REG(FH_SRVC_CHNL),
703 FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_PAUSE);
704
705 iwl_write32(trans, FH_SRVC_CHNL_SRAM_ADDR_REG(FH_SRVC_CHNL),
706 dst_addr);
707
708 iwl_write32(trans, FH_TFDIB_CTRL0_REG(FH_SRVC_CHNL),
709 phy_addr & FH_MEM_TFDIB_DRAM_ADDR_LSB_MSK);
710
711 iwl_write32(trans, FH_TFDIB_CTRL1_REG(FH_SRVC_CHNL),
712 (iwl_get_dma_hi_addr(phy_addr)
713 << FH_MEM_TFDIB_REG1_ADDR_BITSHIFT) | byte_cnt);
714
715 iwl_write32(trans, FH_TCSR_CHNL_TX_BUF_STS_REG(FH_SRVC_CHNL),
716 BIT(FH_TCSR_CHNL_TX_BUF_STS_REG_POS_TB_NUM) |
717 BIT(FH_TCSR_CHNL_TX_BUF_STS_REG_POS_TB_IDX) |
718 FH_TCSR_CHNL_TX_BUF_STS_REG_VAL_TFDB_VALID);
719
720 iwl_write32(trans, FH_TCSR_CHNL_TX_CONFIG_REG(FH_SRVC_CHNL),
721 FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE |
722 FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_DISABLE |
723 FH_TCSR_TX_CONFIG_REG_VAL_CIRQ_HOST_ENDTFD);
724}
725
726static int iwl_pcie_load_firmware_chunk(struct iwl_trans *trans,
727 u32 dst_addr, dma_addr_t phy_addr,
728 u32 byte_cnt)
729{
730 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
731 unsigned long flags;
732 int ret;
733
734 trans_pcie->ucode_write_complete = false;
735
736 if (!iwl_trans_grab_nic_access(trans, &flags))
737 return -EIO;
738
739 iwl_pcie_load_firmware_chunk_fh(trans, dst_addr, phy_addr,
740 byte_cnt);
741 iwl_trans_release_nic_access(trans, &flags);
742
743 ret = wait_event_timeout(trans_pcie->ucode_write_waitq,
744 trans_pcie->ucode_write_complete, 5 * HZ);
745 if (!ret) {
746 IWL_ERR(trans, "Failed to load firmware chunk!\n");
747 iwl_trans_pcie_dump_regs(trans);
748 return -ETIMEDOUT;
749 }
750
751 return 0;
752}
753
754static int iwl_pcie_load_section(struct iwl_trans *trans, u8 section_num,
755 const struct fw_desc *section)
756{
757 u8 *v_addr;
758 dma_addr_t p_addr;
759 u32 offset, chunk_sz = min_t(u32, FH_MEM_TB_MAX_LENGTH, section->len);
760 int ret = 0;
761
762 IWL_DEBUG_FW(trans, "[%d] uCode section being loaded...\n",
763 section_num);
764
765 v_addr = dma_alloc_coherent(trans->dev, chunk_sz, &p_addr,
766 GFP_KERNEL | __GFP_NOWARN);
767 if (!v_addr) {
768 IWL_DEBUG_INFO(trans, "Falling back to small chunks of DMA\n");
769 chunk_sz = PAGE_SIZE;
770 v_addr = dma_alloc_coherent(trans->dev, chunk_sz,
771 &p_addr, GFP_KERNEL);
772 if (!v_addr)
773 return -ENOMEM;
774 }
775
776 for (offset = 0; offset < section->len; offset += chunk_sz) {
777 u32 copy_size, dst_addr;
778 bool extended_addr = false;
779
780 copy_size = min_t(u32, chunk_sz, section->len - offset);
781 dst_addr = section->offset + offset;
782
783 if (dst_addr >= IWL_FW_MEM_EXTENDED_START &&
784 dst_addr <= IWL_FW_MEM_EXTENDED_END)
785 extended_addr = true;
786
787 if (extended_addr)
788 iwl_set_bits_prph(trans, LMPM_CHICK,
789 LMPM_CHICK_EXTENDED_ADDR_SPACE);
790
791 memcpy(v_addr, (u8 *)section->data + offset, copy_size);
792 ret = iwl_pcie_load_firmware_chunk(trans, dst_addr, p_addr,
793 copy_size);
794
795 if (extended_addr)
796 iwl_clear_bits_prph(trans, LMPM_CHICK,
797 LMPM_CHICK_EXTENDED_ADDR_SPACE);
798
799 if (ret) {
800 IWL_ERR(trans,
801 "Could not load the [%d] uCode section\n",
802 section_num);
803 break;
804 }
805 }
806
807 dma_free_coherent(trans->dev, chunk_sz, v_addr, p_addr);
808 return ret;
809}
810
811static int iwl_pcie_load_cpu_sections_8000(struct iwl_trans *trans,
812 const struct fw_img *image,
813 int cpu,
814 int *first_ucode_section)
815{
816 int shift_param;
817 int i, ret = 0, sec_num = 0x1;
818 u32 val, last_read_idx = 0;
819
820 if (cpu == 1) {
821 shift_param = 0;
822 *first_ucode_section = 0;
823 } else {
824 shift_param = 16;
825 (*first_ucode_section)++;
826 }
827
828 for (i = *first_ucode_section; i < image->num_sec; i++) {
829 last_read_idx = i;
830
831 /*
832 * CPU1_CPU2_SEPARATOR_SECTION delimiter - separate between
833 * CPU1 to CPU2.
834 * PAGING_SEPARATOR_SECTION delimiter - separate between
835 * CPU2 non paged to CPU2 paging sec.
836 */
837 if (!image->sec[i].data ||
838 image->sec[i].offset == CPU1_CPU2_SEPARATOR_SECTION ||
839 image->sec[i].offset == PAGING_SEPARATOR_SECTION) {
840 IWL_DEBUG_FW(trans,
841 "Break since Data not valid or Empty section, sec = %d\n",
842 i);
843 break;
844 }
845
846 ret = iwl_pcie_load_section(trans, i, &image->sec[i]);
847 if (ret)
848 return ret;
849
850 /* Notify ucode of loaded section number and status */
851 val = iwl_read_direct32(trans, FH_UCODE_LOAD_STATUS);
852 val = val | (sec_num << shift_param);
853 iwl_write_direct32(trans, FH_UCODE_LOAD_STATUS, val);
854
855 sec_num = (sec_num << 1) | 0x1;
856 }
857
858 *first_ucode_section = last_read_idx;
859
860 iwl_enable_interrupts(trans);
861
862 if (trans->cfg->use_tfh) {
863 if (cpu == 1)
864 iwl_write_prph(trans, UREG_UCODE_LOAD_STATUS,
865 0xFFFF);
866 else
867 iwl_write_prph(trans, UREG_UCODE_LOAD_STATUS,
868 0xFFFFFFFF);
869 } else {
870 if (cpu == 1)
871 iwl_write_direct32(trans, FH_UCODE_LOAD_STATUS,
872 0xFFFF);
873 else
874 iwl_write_direct32(trans, FH_UCODE_LOAD_STATUS,
875 0xFFFFFFFF);
876 }
877
878 return 0;
879}
880
881static int iwl_pcie_load_cpu_sections(struct iwl_trans *trans,
882 const struct fw_img *image,
883 int cpu,
884 int *first_ucode_section)
885{
886 int i, ret = 0;
887 u32 last_read_idx = 0;
888
889 if (cpu == 1)
890 *first_ucode_section = 0;
891 else
892 (*first_ucode_section)++;
893
894 for (i = *first_ucode_section; i < image->num_sec; i++) {
895 last_read_idx = i;
896
897 /*
898 * CPU1_CPU2_SEPARATOR_SECTION delimiter - separate between
899 * CPU1 to CPU2.
900 * PAGING_SEPARATOR_SECTION delimiter - separate between
901 * CPU2 non paged to CPU2 paging sec.
902 */
903 if (!image->sec[i].data ||
904 image->sec[i].offset == CPU1_CPU2_SEPARATOR_SECTION ||
905 image->sec[i].offset == PAGING_SEPARATOR_SECTION) {
906 IWL_DEBUG_FW(trans,
907 "Break since Data not valid or Empty section, sec = %d\n",
908 i);
909 break;
910 }
911
912 ret = iwl_pcie_load_section(trans, i, &image->sec[i]);
913 if (ret)
914 return ret;
915 }
916
917 *first_ucode_section = last_read_idx;
918
919 return 0;
920}
921
922void iwl_pcie_apply_destination(struct iwl_trans *trans)
923{
924 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
925 const struct iwl_fw_dbg_dest_tlv_v1 *dest = trans->dbg_dest_tlv;
926 int i;
927
928 IWL_INFO(trans, "Applying debug destination %s\n",
929 get_fw_dbg_mode_string(dest->monitor_mode));
930
931 if (dest->monitor_mode == EXTERNAL_MODE)
932 iwl_pcie_alloc_fw_monitor(trans, dest->size_power);
933 else
934 IWL_WARN(trans, "PCI should have external buffer debug\n");
935
936 for (i = 0; i < trans->dbg_dest_reg_num; i++) {
937 u32 addr = le32_to_cpu(dest->reg_ops[i].addr);
938 u32 val = le32_to_cpu(dest->reg_ops[i].val);
939
940 switch (dest->reg_ops[i].op) {
941 case CSR_ASSIGN:
942 iwl_write32(trans, addr, val);
943 break;
944 case CSR_SETBIT:
945 iwl_set_bit(trans, addr, BIT(val));
946 break;
947 case CSR_CLEARBIT:
948 iwl_clear_bit(trans, addr, BIT(val));
949 break;
950 case PRPH_ASSIGN:
951 iwl_write_prph(trans, addr, val);
952 break;
953 case PRPH_SETBIT:
954 iwl_set_bits_prph(trans, addr, BIT(val));
955 break;
956 case PRPH_CLEARBIT:
957 iwl_clear_bits_prph(trans, addr, BIT(val));
958 break;
959 case PRPH_BLOCKBIT:
960 if (iwl_read_prph(trans, addr) & BIT(val)) {
961 IWL_ERR(trans,
962 "BIT(%u) in address 0x%x is 1, stopping FW configuration\n",
963 val, addr);
964 goto monitor;
965 }
966 break;
967 default:
968 IWL_ERR(trans, "FW debug - unknown OP %d\n",
969 dest->reg_ops[i].op);
970 break;
971 }
972 }
973
974monitor:
975 if (dest->monitor_mode == EXTERNAL_MODE && trans_pcie->fw_mon_size) {
976 iwl_write_prph(trans, le32_to_cpu(dest->base_reg),
977 trans_pcie->fw_mon_phys >> dest->base_shift);
978 if (trans->cfg->device_family >= IWL_DEVICE_FAMILY_8000)
979 iwl_write_prph(trans, le32_to_cpu(dest->end_reg),
980 (trans_pcie->fw_mon_phys +
981 trans_pcie->fw_mon_size - 256) >>
982 dest->end_shift);
983 else
984 iwl_write_prph(trans, le32_to_cpu(dest->end_reg),
985 (trans_pcie->fw_mon_phys +
986 trans_pcie->fw_mon_size) >>
987 dest->end_shift);
988 }
989}
990
991static int iwl_pcie_load_given_ucode(struct iwl_trans *trans,
992 const struct fw_img *image)
993{
994 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
995 int ret = 0;
996 int first_ucode_section;
997
998 IWL_DEBUG_FW(trans, "working with %s CPU\n",
999 image->is_dual_cpus ? "Dual" : "Single");
1000
1001 /* load to FW the binary non secured sections of CPU1 */
1002 ret = iwl_pcie_load_cpu_sections(trans, image, 1, &first_ucode_section);
1003 if (ret)
1004 return ret;
1005
1006 if (image->is_dual_cpus) {
1007 /* set CPU2 header address */
1008 iwl_write_prph(trans,
1009 LMPM_SECURE_UCODE_LOAD_CPU2_HDR_ADDR,
1010 LMPM_SECURE_CPU2_HDR_MEM_SPACE);
1011
1012 /* load to FW the binary sections of CPU2 */
1013 ret = iwl_pcie_load_cpu_sections(trans, image, 2,
1014 &first_ucode_section);
1015 if (ret)
1016 return ret;
1017 }
1018
1019 /* supported for 7000 only for the moment */
1020 if (iwlwifi_mod_params.fw_monitor &&
1021 trans->cfg->device_family == IWL_DEVICE_FAMILY_7000) {
1022 iwl_pcie_alloc_fw_monitor(trans, 0);
1023
1024 if (trans_pcie->fw_mon_size) {
1025 iwl_write_prph(trans, MON_BUFF_BASE_ADDR,
1026 trans_pcie->fw_mon_phys >> 4);
1027 iwl_write_prph(trans, MON_BUFF_END_ADDR,
1028 (trans_pcie->fw_mon_phys +
1029 trans_pcie->fw_mon_size) >> 4);
1030 }
1031 } else if (trans->dbg_dest_tlv) {
1032 iwl_pcie_apply_destination(trans);
1033 }
1034
1035 iwl_enable_interrupts(trans);
1036
1037 /* release CPU reset */
1038 iwl_write32(trans, CSR_RESET, 0);
1039
1040 return 0;
1041}
1042
1043static int iwl_pcie_load_given_ucode_8000(struct iwl_trans *trans,
1044 const struct fw_img *image)
1045{
1046 int ret = 0;
1047 int first_ucode_section;
1048
1049 IWL_DEBUG_FW(trans, "working with %s CPU\n",
1050 image->is_dual_cpus ? "Dual" : "Single");
1051
1052 if (trans->dbg_dest_tlv)
1053 iwl_pcie_apply_destination(trans);
1054
1055 IWL_DEBUG_POWER(trans, "Original WFPM value = 0x%08X\n",
1056 iwl_read_prph(trans, WFPM_GP2));
1057
1058 /*
1059 * Set default value. On resume reading the values that were
1060 * zeored can provide debug data on the resume flow.
1061 * This is for debugging only and has no functional impact.
1062 */
1063 iwl_write_prph(trans, WFPM_GP2, 0x01010101);
1064
1065 /* configure the ucode to be ready to get the secured image */
1066 /* release CPU reset */
1067 iwl_write_prph(trans, RELEASE_CPU_RESET, RELEASE_CPU_RESET_BIT);
1068
1069 /* load to FW the binary Secured sections of CPU1 */
1070 ret = iwl_pcie_load_cpu_sections_8000(trans, image, 1,
1071 &first_ucode_section);
1072 if (ret)
1073 return ret;
1074
1075 /* load to FW the binary sections of CPU2 */
1076 return iwl_pcie_load_cpu_sections_8000(trans, image, 2,
1077 &first_ucode_section);
1078}
1079
1080bool iwl_pcie_check_hw_rf_kill(struct iwl_trans *trans)
1081{
1082 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1083 bool hw_rfkill = iwl_is_rfkill_set(trans);
1084 bool prev = test_bit(STATUS_RFKILL_OPMODE, &trans->status);
1085 bool report;
1086
1087 if (hw_rfkill) {
1088 set_bit(STATUS_RFKILL_HW, &trans->status);
1089 set_bit(STATUS_RFKILL_OPMODE, &trans->status);
1090 } else {
1091 clear_bit(STATUS_RFKILL_HW, &trans->status);
1092 if (trans_pcie->opmode_down)
1093 clear_bit(STATUS_RFKILL_OPMODE, &trans->status);
1094 }
1095
1096 report = test_bit(STATUS_RFKILL_OPMODE, &trans->status);
1097
1098 if (prev != report)
1099 iwl_trans_pcie_rf_kill(trans, report);
1100
1101 return hw_rfkill;
1102}
1103
1104struct iwl_causes_list {
1105 u32 cause_num;
1106 u32 mask_reg;
1107 u8 addr;
1108};
1109
1110static struct iwl_causes_list causes_list[] = {
1111 {MSIX_FH_INT_CAUSES_D2S_CH0_NUM, CSR_MSIX_FH_INT_MASK_AD, 0},
1112 {MSIX_FH_INT_CAUSES_D2S_CH1_NUM, CSR_MSIX_FH_INT_MASK_AD, 0x1},
1113 {MSIX_FH_INT_CAUSES_S2D, CSR_MSIX_FH_INT_MASK_AD, 0x3},
1114 {MSIX_FH_INT_CAUSES_FH_ERR, CSR_MSIX_FH_INT_MASK_AD, 0x5},
1115 {MSIX_HW_INT_CAUSES_REG_ALIVE, CSR_MSIX_HW_INT_MASK_AD, 0x10},
1116 {MSIX_HW_INT_CAUSES_REG_WAKEUP, CSR_MSIX_HW_INT_MASK_AD, 0x11},
1117 {MSIX_HW_INT_CAUSES_REG_CT_KILL, CSR_MSIX_HW_INT_MASK_AD, 0x16},
1118 {MSIX_HW_INT_CAUSES_REG_RF_KILL, CSR_MSIX_HW_INT_MASK_AD, 0x17},
1119 {MSIX_HW_INT_CAUSES_REG_PERIODIC, CSR_MSIX_HW_INT_MASK_AD, 0x18},
1120 {MSIX_HW_INT_CAUSES_REG_SW_ERR, CSR_MSIX_HW_INT_MASK_AD, 0x29},
1121 {MSIX_HW_INT_CAUSES_REG_SCD, CSR_MSIX_HW_INT_MASK_AD, 0x2A},
1122 {MSIX_HW_INT_CAUSES_REG_FH_TX, CSR_MSIX_HW_INT_MASK_AD, 0x2B},
1123 {MSIX_HW_INT_CAUSES_REG_HW_ERR, CSR_MSIX_HW_INT_MASK_AD, 0x2D},
1124 {MSIX_HW_INT_CAUSES_REG_HAP, CSR_MSIX_HW_INT_MASK_AD, 0x2E},
1125};
1126
1127static void iwl_pcie_map_non_rx_causes(struct iwl_trans *trans)
1128{
1129 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1130 int val = trans_pcie->def_irq | MSIX_NON_AUTO_CLEAR_CAUSE;
1131 int i;
1132
1133 /*
1134 * Access all non RX causes and map them to the default irq.
1135 * In case we are missing at least one interrupt vector,
1136 * the first interrupt vector will serve non-RX and FBQ causes.
1137 */
1138 for (i = 0; i < ARRAY_SIZE(causes_list); i++) {
1139 iwl_write8(trans, CSR_MSIX_IVAR(causes_list[i].addr), val);
1140 iwl_clear_bit(trans, causes_list[i].mask_reg,
1141 causes_list[i].cause_num);
1142 }
1143}
1144
1145static void iwl_pcie_map_rx_causes(struct iwl_trans *trans)
1146{
1147 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1148 u32 offset =
1149 trans_pcie->shared_vec_mask & IWL_SHARED_IRQ_FIRST_RSS ? 1 : 0;
1150 u32 val, idx;
1151
1152 /*
1153 * The first RX queue - fallback queue, which is designated for
1154 * management frame, command responses etc, is always mapped to the
1155 * first interrupt vector. The other RX queues are mapped to
1156 * the other (N - 2) interrupt vectors.
1157 */
1158 val = BIT(MSIX_FH_INT_CAUSES_Q(0));
1159 for (idx = 1; idx < trans->num_rx_queues; idx++) {
1160 iwl_write8(trans, CSR_MSIX_RX_IVAR(idx),
1161 MSIX_FH_INT_CAUSES_Q(idx - offset));
1162 val |= BIT(MSIX_FH_INT_CAUSES_Q(idx));
1163 }
1164 iwl_write32(trans, CSR_MSIX_FH_INT_MASK_AD, ~val);
1165
1166 val = MSIX_FH_INT_CAUSES_Q(0);
1167 if (trans_pcie->shared_vec_mask & IWL_SHARED_IRQ_NON_RX)
1168 val |= MSIX_NON_AUTO_CLEAR_CAUSE;
1169 iwl_write8(trans, CSR_MSIX_RX_IVAR(0), val);
1170
1171 if (trans_pcie->shared_vec_mask & IWL_SHARED_IRQ_FIRST_RSS)
1172 iwl_write8(trans, CSR_MSIX_RX_IVAR(1), val);
1173}
1174
1175void iwl_pcie_conf_msix_hw(struct iwl_trans_pcie *trans_pcie)
1176{
1177 struct iwl_trans *trans = trans_pcie->trans;
1178
1179 if (!trans_pcie->msix_enabled) {
1180 if (trans->cfg->mq_rx_supported &&
1181 test_bit(STATUS_DEVICE_ENABLED, &trans->status))
1182 iwl_write_prph(trans, UREG_CHICK,
1183 UREG_CHICK_MSI_ENABLE);
1184 return;
1185 }
1186 /*
1187 * The IVAR table needs to be configured again after reset,
1188 * but if the device is disabled, we can't write to
1189 * prph.
1190 */
1191 if (test_bit(STATUS_DEVICE_ENABLED, &trans->status))
1192 iwl_write_prph(trans, UREG_CHICK, UREG_CHICK_MSIX_ENABLE);
1193
1194 /*
1195 * Each cause from the causes list above and the RX causes is
1196 * represented as a byte in the IVAR table. The first nibble
1197 * represents the bound interrupt vector of the cause, the second
1198 * represents no auto clear for this cause. This will be set if its
1199 * interrupt vector is bound to serve other causes.
1200 */
1201 iwl_pcie_map_rx_causes(trans);
1202
1203 iwl_pcie_map_non_rx_causes(trans);
1204}
1205
1206static void iwl_pcie_init_msix(struct iwl_trans_pcie *trans_pcie)
1207{
1208 struct iwl_trans *trans = trans_pcie->trans;
1209
1210 iwl_pcie_conf_msix_hw(trans_pcie);
1211
1212 if (!trans_pcie->msix_enabled)
1213 return;
1214
1215 trans_pcie->fh_init_mask = ~iwl_read32(trans, CSR_MSIX_FH_INT_MASK_AD);
1216 trans_pcie->fh_mask = trans_pcie->fh_init_mask;
1217 trans_pcie->hw_init_mask = ~iwl_read32(trans, CSR_MSIX_HW_INT_MASK_AD);
1218 trans_pcie->hw_mask = trans_pcie->hw_init_mask;
1219}
1220
1221static void _iwl_trans_pcie_stop_device(struct iwl_trans *trans, bool low_power)
1222{
1223 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1224
1225 lockdep_assert_held(&trans_pcie->mutex);
1226
1227 if (trans_pcie->is_down)
1228 return;
1229
1230 trans_pcie->is_down = true;
1231
1232 /* Stop dbgc before stopping device */
1233 if (trans->cfg->device_family == IWL_DEVICE_FAMILY_7000) {
1234 iwl_set_bits_prph(trans, MON_BUFF_SAMPLE_CTL, 0x100);
1235 } else {
1236 iwl_write_prph(trans, DBGC_IN_SAMPLE, 0);
1237 udelay(100);
1238 iwl_write_prph(trans, DBGC_OUT_CTRL, 0);
1239 }
1240
1241 /* tell the device to stop sending interrupts */
1242 iwl_disable_interrupts(trans);
1243
1244 /* device going down, Stop using ICT table */
1245 iwl_pcie_disable_ict(trans);
1246
1247 /*
1248 * If a HW restart happens during firmware loading,
1249 * then the firmware loading might call this function
1250 * and later it might be called again due to the
1251 * restart. So don't process again if the device is
1252 * already dead.
1253 */
1254 if (test_and_clear_bit(STATUS_DEVICE_ENABLED, &trans->status)) {
1255 IWL_DEBUG_INFO(trans,
1256 "DEVICE_ENABLED bit was set and is now cleared\n");
1257 iwl_pcie_tx_stop(trans);
1258 iwl_pcie_rx_stop(trans);
1259
1260 /* Power-down device's busmaster DMA clocks */
1261 if (!trans->cfg->apmg_not_supported) {
1262 iwl_write_prph(trans, APMG_CLK_DIS_REG,
1263 APMG_CLK_VAL_DMA_CLK_RQT);
1264 udelay(5);
1265 }
1266 }
1267
1268 /* Make sure (redundant) we've released our request to stay awake */
1269 iwl_clear_bit(trans, CSR_GP_CNTRL,
1270 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
1271
1272 /* Stop the device, and put it in low power state */
1273 iwl_pcie_apm_stop(trans, false);
1274
1275 iwl_trans_pcie_sw_reset(trans);
1276
1277 /*
1278 * Upon stop, the IVAR table gets erased, so msi-x won't
1279 * work. This causes a bug in RF-KILL flows, since the interrupt
1280 * that enables radio won't fire on the correct irq, and the
1281 * driver won't be able to handle the interrupt.
1282 * Configure the IVAR table again after reset.
1283 */
1284 iwl_pcie_conf_msix_hw(trans_pcie);
1285
1286 /*
1287 * Upon stop, the APM issues an interrupt if HW RF kill is set.
1288 * This is a bug in certain verions of the hardware.
1289 * Certain devices also keep sending HW RF kill interrupt all
1290 * the time, unless the interrupt is ACKed even if the interrupt
1291 * should be masked. Re-ACK all the interrupts here.
1292 */
1293 iwl_disable_interrupts(trans);
1294
1295 /* clear all status bits */
1296 clear_bit(STATUS_SYNC_HCMD_ACTIVE, &trans->status);
1297 clear_bit(STATUS_INT_ENABLED, &trans->status);
1298 clear_bit(STATUS_TPOWER_PMI, &trans->status);
1299
1300 /*
1301 * Even if we stop the HW, we still want the RF kill
1302 * interrupt
1303 */
1304 iwl_enable_rfkill_int(trans);
1305
1306 /* re-take ownership to prevent other users from stealing the device */
1307 iwl_pcie_prepare_card_hw(trans);
1308}
1309
1310void iwl_pcie_synchronize_irqs(struct iwl_trans *trans)
1311{
1312 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1313
1314 if (trans_pcie->msix_enabled) {
1315 int i;
1316
1317 for (i = 0; i < trans_pcie->alloc_vecs; i++)
1318 synchronize_irq(trans_pcie->msix_entries[i].vector);
1319 } else {
1320 synchronize_irq(trans_pcie->pci_dev->irq);
1321 }
1322}
1323
1324static int iwl_trans_pcie_start_fw(struct iwl_trans *trans,
1325 const struct fw_img *fw, bool run_in_rfkill)
1326{
1327 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1328 bool hw_rfkill;
1329 int ret;
1330
1331 /* This may fail if AMT took ownership of the device */
1332 if (iwl_pcie_prepare_card_hw(trans)) {
1333 IWL_WARN(trans, "Exit HW not ready\n");
1334 ret = -EIO;
1335 goto out;
1336 }
1337
1338 iwl_enable_rfkill_int(trans);
1339
1340 iwl_write32(trans, CSR_INT, 0xFFFFFFFF);
1341
1342 /*
1343 * We enabled the RF-Kill interrupt and the handler may very
1344 * well be running. Disable the interrupts to make sure no other
1345 * interrupt can be fired.
1346 */
1347 iwl_disable_interrupts(trans);
1348
1349 /* Make sure it finished running */
1350 iwl_pcie_synchronize_irqs(trans);
1351
1352 mutex_lock(&trans_pcie->mutex);
1353
1354 /* If platform's RF_KILL switch is NOT set to KILL */
1355 hw_rfkill = iwl_pcie_check_hw_rf_kill(trans);
1356 if (hw_rfkill && !run_in_rfkill) {
1357 ret = -ERFKILL;
1358 goto out;
1359 }
1360
1361 /* Someone called stop_device, don't try to start_fw */
1362 if (trans_pcie->is_down) {
1363 IWL_WARN(trans,
1364 "Can't start_fw since the HW hasn't been started\n");
1365 ret = -EIO;
1366 goto out;
1367 }
1368
1369 /* make sure rfkill handshake bits are cleared */
1370 iwl_write32(trans, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1371 iwl_write32(trans, CSR_UCODE_DRV_GP1_CLR,
1372 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
1373
1374 /* clear (again), then enable host interrupts */
1375 iwl_write32(trans, CSR_INT, 0xFFFFFFFF);
1376
1377 ret = iwl_pcie_nic_init(trans);
1378 if (ret) {
1379 IWL_ERR(trans, "Unable to init nic\n");
1380 goto out;
1381 }
1382
1383 /*
1384 * Now, we load the firmware and don't want to be interrupted, even
1385 * by the RF-Kill interrupt (hence mask all the interrupt besides the
1386 * FH_TX interrupt which is needed to load the firmware). If the
1387 * RF-Kill switch is toggled, we will find out after having loaded
1388 * the firmware and return the proper value to the caller.
1389 */
1390 iwl_enable_fw_load_int(trans);
1391
1392 /* really make sure rfkill handshake bits are cleared */
1393 iwl_write32(trans, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1394 iwl_write32(trans, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1395
1396 /* Load the given image to the HW */
1397 if (trans->cfg->device_family >= IWL_DEVICE_FAMILY_8000)
1398 ret = iwl_pcie_load_given_ucode_8000(trans, fw);
1399 else
1400 ret = iwl_pcie_load_given_ucode(trans, fw);
1401
1402 /* re-check RF-Kill state since we may have missed the interrupt */
1403 hw_rfkill = iwl_pcie_check_hw_rf_kill(trans);
1404 if (hw_rfkill && !run_in_rfkill)
1405 ret = -ERFKILL;
1406
1407out:
1408 mutex_unlock(&trans_pcie->mutex);
1409 return ret;
1410}
1411
1412static void iwl_trans_pcie_fw_alive(struct iwl_trans *trans, u32 scd_addr)
1413{
1414 iwl_pcie_reset_ict(trans);
1415 iwl_pcie_tx_start(trans, scd_addr);
1416}
1417
1418void iwl_trans_pcie_handle_stop_rfkill(struct iwl_trans *trans,
1419 bool was_in_rfkill)
1420{
1421 bool hw_rfkill;
1422
1423 /*
1424 * Check again since the RF kill state may have changed while
1425 * all the interrupts were disabled, in this case we couldn't
1426 * receive the RF kill interrupt and update the state in the
1427 * op_mode.
1428 * Don't call the op_mode if the rkfill state hasn't changed.
1429 * This allows the op_mode to call stop_device from the rfkill
1430 * notification without endless recursion. Under very rare
1431 * circumstances, we might have a small recursion if the rfkill
1432 * state changed exactly now while we were called from stop_device.
1433 * This is very unlikely but can happen and is supported.
1434 */
1435 hw_rfkill = iwl_is_rfkill_set(trans);
1436 if (hw_rfkill) {
1437 set_bit(STATUS_RFKILL_HW, &trans->status);
1438 set_bit(STATUS_RFKILL_OPMODE, &trans->status);
1439 } else {
1440 clear_bit(STATUS_RFKILL_HW, &trans->status);
1441 clear_bit(STATUS_RFKILL_OPMODE, &trans->status);
1442 }
1443 if (hw_rfkill != was_in_rfkill)
1444 iwl_trans_pcie_rf_kill(trans, hw_rfkill);
1445}
1446
1447static void iwl_trans_pcie_stop_device(struct iwl_trans *trans, bool low_power)
1448{
1449 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1450 bool was_in_rfkill;
1451
1452 mutex_lock(&trans_pcie->mutex);
1453 trans_pcie->opmode_down = true;
1454 was_in_rfkill = test_bit(STATUS_RFKILL_OPMODE, &trans->status);
1455 _iwl_trans_pcie_stop_device(trans, low_power);
1456 iwl_trans_pcie_handle_stop_rfkill(trans, was_in_rfkill);
1457 mutex_unlock(&trans_pcie->mutex);
1458}
1459
1460void iwl_trans_pcie_rf_kill(struct iwl_trans *trans, bool state)
1461{
1462 struct iwl_trans_pcie __maybe_unused *trans_pcie =
1463 IWL_TRANS_GET_PCIE_TRANS(trans);
1464
1465 lockdep_assert_held(&trans_pcie->mutex);
1466
1467 IWL_WARN(trans, "reporting RF_KILL (radio %s)\n",
1468 state ? "disabled" : "enabled");
1469 if (iwl_op_mode_hw_rf_kill(trans->op_mode, state)) {
1470 if (trans->cfg->gen2)
1471 _iwl_trans_pcie_gen2_stop_device(trans, true);
1472 else
1473 _iwl_trans_pcie_stop_device(trans, true);
1474 }
1475}
1476
1477static void iwl_trans_pcie_d3_suspend(struct iwl_trans *trans, bool test,
1478 bool reset)
1479{
1480 if (!reset) {
1481 /* Enable persistence mode to avoid reset */
1482 iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG,
1483 CSR_HW_IF_CONFIG_REG_PERSIST_MODE);
1484 }
1485
1486 iwl_disable_interrupts(trans);
1487
1488 /*
1489 * in testing mode, the host stays awake and the
1490 * hardware won't be reset (not even partially)
1491 */
1492 if (test)
1493 return;
1494
1495 iwl_pcie_disable_ict(trans);
1496
1497 iwl_pcie_synchronize_irqs(trans);
1498
1499 iwl_clear_bit(trans, CSR_GP_CNTRL,
1500 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
1501 iwl_clear_bit(trans, CSR_GP_CNTRL,
1502 CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1503
1504 iwl_pcie_enable_rx_wake(trans, false);
1505
1506 if (reset) {
1507 /*
1508 * reset TX queues -- some of their registers reset during S3
1509 * so if we don't reset everything here the D3 image would try
1510 * to execute some invalid memory upon resume
1511 */
1512 iwl_trans_pcie_tx_reset(trans);
1513 }
1514
1515 iwl_pcie_set_pwr(trans, true);
1516}
1517
1518static int iwl_trans_pcie_d3_resume(struct iwl_trans *trans,
1519 enum iwl_d3_status *status,
1520 bool test, bool reset)
1521{
1522 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1523 u32 val;
1524 int ret;
1525
1526 if (test) {
1527 iwl_enable_interrupts(trans);
1528 *status = IWL_D3_STATUS_ALIVE;
1529 return 0;
1530 }
1531
1532 iwl_pcie_enable_rx_wake(trans, true);
1533
1534 /*
1535 * Reconfigure IVAR table in case of MSIX or reset ict table in
1536 * MSI mode since HW reset erased it.
1537 * Also enables interrupts - none will happen as
1538 * the device doesn't know we're waking it up, only when
1539 * the opmode actually tells it after this call.
1540 */
1541 iwl_pcie_conf_msix_hw(trans_pcie);
1542 if (!trans_pcie->msix_enabled)
1543 iwl_pcie_reset_ict(trans);
1544 iwl_enable_interrupts(trans);
1545
1546 iwl_set_bit(trans, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
1547 iwl_set_bit(trans, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1548
1549 if (trans->cfg->device_family >= IWL_DEVICE_FAMILY_8000)
1550 udelay(2);
1551
1552 ret = iwl_poll_bit(trans, CSR_GP_CNTRL,
1553 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
1554 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
1555 25000);
1556 if (ret < 0) {
1557 IWL_ERR(trans, "Failed to resume the device (mac ready)\n");
1558 return ret;
1559 }
1560
1561 iwl_pcie_set_pwr(trans, false);
1562
1563 if (!reset) {
1564 iwl_clear_bit(trans, CSR_GP_CNTRL,
1565 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
1566 } else {
1567 iwl_trans_pcie_tx_reset(trans);
1568
1569 ret = iwl_pcie_rx_init(trans);
1570 if (ret) {
1571 IWL_ERR(trans,
1572 "Failed to resume the device (RX reset)\n");
1573 return ret;
1574 }
1575 }
1576
1577 IWL_DEBUG_POWER(trans, "WFPM value upon resume = 0x%08X\n",
1578 iwl_read_prph(trans, WFPM_GP2));
1579
1580 val = iwl_read32(trans, CSR_RESET);
1581 if (val & CSR_RESET_REG_FLAG_NEVO_RESET)
1582 *status = IWL_D3_STATUS_RESET;
1583 else
1584 *status = IWL_D3_STATUS_ALIVE;
1585
1586 return 0;
1587}
1588
1589static void iwl_pcie_set_interrupt_capa(struct pci_dev *pdev,
1590 struct iwl_trans *trans)
1591{
1592 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1593 int max_irqs, num_irqs, i, ret;
1594 u16 pci_cmd;
1595
1596 if (!trans->cfg->mq_rx_supported)
1597 goto enable_msi;
1598
1599 max_irqs = min_t(u32, num_online_cpus() + 2, IWL_MAX_RX_HW_QUEUES);
1600 for (i = 0; i < max_irqs; i++)
1601 trans_pcie->msix_entries[i].entry = i;
1602
1603 num_irqs = pci_enable_msix_range(pdev, trans_pcie->msix_entries,
1604 MSIX_MIN_INTERRUPT_VECTORS,
1605 max_irqs);
1606 if (num_irqs < 0) {
1607 IWL_DEBUG_INFO(trans,
1608 "Failed to enable msi-x mode (ret %d). Moving to msi mode.\n",
1609 num_irqs);
1610 goto enable_msi;
1611 }
1612 trans_pcie->def_irq = (num_irqs == max_irqs) ? num_irqs - 1 : 0;
1613
1614 IWL_DEBUG_INFO(trans,
1615 "MSI-X enabled. %d interrupt vectors were allocated\n",
1616 num_irqs);
1617
1618 /*
1619 * In case the OS provides fewer interrupts than requested, different
1620 * causes will share the same interrupt vector as follows:
1621 * One interrupt less: non rx causes shared with FBQ.
1622 * Two interrupts less: non rx causes shared with FBQ and RSS.
1623 * More than two interrupts: we will use fewer RSS queues.
1624 */
1625 if (num_irqs <= max_irqs - 2) {
1626 trans_pcie->trans->num_rx_queues = num_irqs + 1;
1627 trans_pcie->shared_vec_mask = IWL_SHARED_IRQ_NON_RX |
1628 IWL_SHARED_IRQ_FIRST_RSS;
1629 } else if (num_irqs == max_irqs - 1) {
1630 trans_pcie->trans->num_rx_queues = num_irqs;
1631 trans_pcie->shared_vec_mask = IWL_SHARED_IRQ_NON_RX;
1632 } else {
1633 trans_pcie->trans->num_rx_queues = num_irqs - 1;
1634 }
1635 WARN_ON(trans_pcie->trans->num_rx_queues > IWL_MAX_RX_HW_QUEUES);
1636
1637 trans_pcie->alloc_vecs = num_irqs;
1638 trans_pcie->msix_enabled = true;
1639 return;
1640
1641enable_msi:
1642 ret = pci_enable_msi(pdev);
1643 if (ret) {
1644 dev_err(&pdev->dev, "pci_enable_msi failed - %d\n", ret);
1645 /* enable rfkill interrupt: hw bug w/a */
1646 pci_read_config_word(pdev, PCI_COMMAND, &pci_cmd);
1647 if (pci_cmd & PCI_COMMAND_INTX_DISABLE) {
1648 pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
1649 pci_write_config_word(pdev, PCI_COMMAND, pci_cmd);
1650 }
1651 }
1652}
1653
1654static void iwl_pcie_irq_set_affinity(struct iwl_trans *trans)
1655{
1656 int iter_rx_q, i, ret, cpu, offset;
1657 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1658
1659 i = trans_pcie->shared_vec_mask & IWL_SHARED_IRQ_FIRST_RSS ? 0 : 1;
1660 iter_rx_q = trans_pcie->trans->num_rx_queues - 1 + i;
1661 offset = 1 + i;
1662 for (; i < iter_rx_q ; i++) {
1663 /*
1664 * Get the cpu prior to the place to search
1665 * (i.e. return will be > i - 1).
1666 */
1667 cpu = cpumask_next(i - offset, cpu_online_mask);
1668 cpumask_set_cpu(cpu, &trans_pcie->affinity_mask[i]);
1669 ret = irq_set_affinity_hint(trans_pcie->msix_entries[i].vector,
1670 &trans_pcie->affinity_mask[i]);
1671 if (ret)
1672 IWL_ERR(trans_pcie->trans,
1673 "Failed to set affinity mask for IRQ %d\n",
1674 i);
1675 }
1676}
1677
1678static const char *queue_name(struct device *dev,
1679 struct iwl_trans_pcie *trans_p, int i)
1680{
1681 if (trans_p->shared_vec_mask) {
1682 int vec = trans_p->shared_vec_mask &
1683 IWL_SHARED_IRQ_FIRST_RSS ? 1 : 0;
1684
1685 if (i == 0)
1686 return DRV_NAME ": shared IRQ";
1687
1688 return devm_kasprintf(dev, GFP_KERNEL,
1689 DRV_NAME ": queue %d", i + vec);
1690 }
1691 if (i == 0)
1692 return DRV_NAME ": default queue";
1693
1694 if (i == trans_p->alloc_vecs - 1)
1695 return DRV_NAME ": exception";
1696
1697 return devm_kasprintf(dev, GFP_KERNEL,
1698 DRV_NAME ": queue %d", i);
1699}
1700
1701static int iwl_pcie_init_msix_handler(struct pci_dev *pdev,
1702 struct iwl_trans_pcie *trans_pcie)
1703{
1704 int i;
1705
1706 for (i = 0; i < trans_pcie->alloc_vecs; i++) {
1707 int ret;
1708 struct msix_entry *msix_entry;
1709 const char *qname = queue_name(&pdev->dev, trans_pcie, i);
1710
1711 if (!qname)
1712 return -ENOMEM;
1713
1714 msix_entry = &trans_pcie->msix_entries[i];
1715 ret = devm_request_threaded_irq(&pdev->dev,
1716 msix_entry->vector,
1717 iwl_pcie_msix_isr,
1718 (i == trans_pcie->def_irq) ?
1719 iwl_pcie_irq_msix_handler :
1720 iwl_pcie_irq_rx_msix_handler,
1721 IRQF_SHARED,
1722 qname,
1723 msix_entry);
1724 if (ret) {
1725 IWL_ERR(trans_pcie->trans,
1726 "Error allocating IRQ %d\n", i);
1727
1728 return ret;
1729 }
1730 }
1731 iwl_pcie_irq_set_affinity(trans_pcie->trans);
1732
1733 return 0;
1734}
1735
1736static int _iwl_trans_pcie_start_hw(struct iwl_trans *trans, bool low_power)
1737{
1738 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1739 int err;
1740
1741 lockdep_assert_held(&trans_pcie->mutex);
1742
1743 err = iwl_pcie_prepare_card_hw(trans);
1744 if (err) {
1745 IWL_ERR(trans, "Error while preparing HW: %d\n", err);
1746 return err;
1747 }
1748
1749 iwl_trans_pcie_sw_reset(trans);
1750
1751 err = iwl_pcie_apm_init(trans);
1752 if (err)
1753 return err;
1754
1755 iwl_pcie_init_msix(trans_pcie);
1756
1757 /* From now on, the op_mode will be kept updated about RF kill state */
1758 iwl_enable_rfkill_int(trans);
1759
1760 trans_pcie->opmode_down = false;
1761
1762 /* Set is_down to false here so that...*/
1763 trans_pcie->is_down = false;
1764
1765 /* ...rfkill can call stop_device and set it false if needed */
1766 iwl_pcie_check_hw_rf_kill(trans);
1767
1768 /* Make sure we sync here, because we'll need full access later */
1769 if (low_power)
1770 pm_runtime_resume(trans->dev);
1771
1772 return 0;
1773}
1774
1775static int iwl_trans_pcie_start_hw(struct iwl_trans *trans, bool low_power)
1776{
1777 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1778 int ret;
1779
1780 mutex_lock(&trans_pcie->mutex);
1781 ret = _iwl_trans_pcie_start_hw(trans, low_power);
1782 mutex_unlock(&trans_pcie->mutex);
1783
1784 return ret;
1785}
1786
1787static void iwl_trans_pcie_op_mode_leave(struct iwl_trans *trans)
1788{
1789 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1790
1791 mutex_lock(&trans_pcie->mutex);
1792
1793 /* disable interrupts - don't enable HW RF kill interrupt */
1794 iwl_disable_interrupts(trans);
1795
1796 iwl_pcie_apm_stop(trans, true);
1797
1798 iwl_disable_interrupts(trans);
1799
1800 iwl_pcie_disable_ict(trans);
1801
1802 mutex_unlock(&trans_pcie->mutex);
1803
1804 iwl_pcie_synchronize_irqs(trans);
1805}
1806
1807static void iwl_trans_pcie_write8(struct iwl_trans *trans, u32 ofs, u8 val)
1808{
1809 writeb(val, IWL_TRANS_GET_PCIE_TRANS(trans)->hw_base + ofs);
1810}
1811
1812static void iwl_trans_pcie_write32(struct iwl_trans *trans, u32 ofs, u32 val)
1813{
1814 writel(val, IWL_TRANS_GET_PCIE_TRANS(trans)->hw_base + ofs);
1815}
1816
1817static u32 iwl_trans_pcie_read32(struct iwl_trans *trans, u32 ofs)
1818{
1819 return readl(IWL_TRANS_GET_PCIE_TRANS(trans)->hw_base + ofs);
1820}
1821
1822static u32 iwl_trans_pcie_read_prph(struct iwl_trans *trans, u32 reg)
1823{
1824 iwl_trans_pcie_write32(trans, HBUS_TARG_PRPH_RADDR,
1825 ((reg & 0x000FFFFF) | (3 << 24)));
1826 return iwl_trans_pcie_read32(trans, HBUS_TARG_PRPH_RDAT);
1827}
1828
1829static void iwl_trans_pcie_write_prph(struct iwl_trans *trans, u32 addr,
1830 u32 val)
1831{
1832 iwl_trans_pcie_write32(trans, HBUS_TARG_PRPH_WADDR,
1833 ((addr & 0x000FFFFF) | (3 << 24)));
1834 iwl_trans_pcie_write32(trans, HBUS_TARG_PRPH_WDAT, val);
1835}
1836
1837static void iwl_trans_pcie_configure(struct iwl_trans *trans,
1838 const struct iwl_trans_config *trans_cfg)
1839{
1840 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1841
1842 trans_pcie->cmd_queue = trans_cfg->cmd_queue;
1843 trans_pcie->cmd_fifo = trans_cfg->cmd_fifo;
1844 trans_pcie->cmd_q_wdg_timeout = trans_cfg->cmd_q_wdg_timeout;
1845 if (WARN_ON(trans_cfg->n_no_reclaim_cmds > MAX_NO_RECLAIM_CMDS))
1846 trans_pcie->n_no_reclaim_cmds = 0;
1847 else
1848 trans_pcie->n_no_reclaim_cmds = trans_cfg->n_no_reclaim_cmds;
1849 if (trans_pcie->n_no_reclaim_cmds)
1850 memcpy(trans_pcie->no_reclaim_cmds, trans_cfg->no_reclaim_cmds,
1851 trans_pcie->n_no_reclaim_cmds * sizeof(u8));
1852
1853 trans_pcie->rx_buf_size = trans_cfg->rx_buf_size;
1854 trans_pcie->rx_page_order =
1855 iwl_trans_get_rb_size_order(trans_pcie->rx_buf_size);
1856
1857 trans_pcie->bc_table_dword = trans_cfg->bc_table_dword;
1858 trans_pcie->scd_set_active = trans_cfg->scd_set_active;
1859 trans_pcie->sw_csum_tx = trans_cfg->sw_csum_tx;
1860
1861 trans_pcie->page_offs = trans_cfg->cb_data_offs;
1862 trans_pcie->dev_cmd_offs = trans_cfg->cb_data_offs + sizeof(void *);
1863
1864 trans->command_groups = trans_cfg->command_groups;
1865 trans->command_groups_size = trans_cfg->command_groups_size;
1866
1867 /* Initialize NAPI here - it should be before registering to mac80211
1868 * in the opmode but after the HW struct is allocated.
1869 * As this function may be called again in some corner cases don't
1870 * do anything if NAPI was already initialized.
1871 */
1872 if (trans_pcie->napi_dev.reg_state != NETREG_DUMMY)
1873 init_dummy_netdev(&trans_pcie->napi_dev);
1874}
1875
1876void iwl_trans_pcie_free(struct iwl_trans *trans)
1877{
1878 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1879 int i;
1880
1881 iwl_pcie_synchronize_irqs(trans);
1882
1883 if (trans->cfg->gen2)
1884 iwl_pcie_gen2_tx_free(trans);
1885 else
1886 iwl_pcie_tx_free(trans);
1887 iwl_pcie_rx_free(trans);
1888
1889 if (trans_pcie->rba.alloc_wq) {
1890 destroy_workqueue(trans_pcie->rba.alloc_wq);
1891 trans_pcie->rba.alloc_wq = NULL;
1892 }
1893
1894 if (trans_pcie->msix_enabled) {
1895 for (i = 0; i < trans_pcie->alloc_vecs; i++) {
1896 irq_set_affinity_hint(
1897 trans_pcie->msix_entries[i].vector,
1898 NULL);
1899 }
1900
1901 trans_pcie->msix_enabled = false;
1902 } else {
1903 iwl_pcie_free_ict(trans);
1904 }
1905
1906 iwl_pcie_free_fw_monitor(trans);
1907
1908 for_each_possible_cpu(i) {
1909 struct iwl_tso_hdr_page *p =
1910 per_cpu_ptr(trans_pcie->tso_hdr_page, i);
1911
1912 if (p->page)
1913 __free_page(p->page);
1914 }
1915
1916 free_percpu(trans_pcie->tso_hdr_page);
1917 mutex_destroy(&trans_pcie->mutex);
1918 iwl_trans_free(trans);
1919}
1920
1921static void iwl_trans_pcie_set_pmi(struct iwl_trans *trans, bool state)
1922{
1923 if (state)
1924 set_bit(STATUS_TPOWER_PMI, &trans->status);
1925 else
1926 clear_bit(STATUS_TPOWER_PMI, &trans->status);
1927}
1928
1929static bool iwl_trans_pcie_grab_nic_access(struct iwl_trans *trans,
1930 unsigned long *flags)
1931{
1932 int ret;
1933 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1934
1935 spin_lock_irqsave(&trans_pcie->reg_lock, *flags);
1936
1937 if (trans_pcie->cmd_hold_nic_awake)
1938 goto out;
1939
1940 /* this bit wakes up the NIC */
1941 __iwl_trans_pcie_set_bit(trans, CSR_GP_CNTRL,
1942 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
1943 if (trans->cfg->device_family >= IWL_DEVICE_FAMILY_8000)
1944 udelay(2);
1945
1946 /*
1947 * These bits say the device is running, and should keep running for
1948 * at least a short while (at least as long as MAC_ACCESS_REQ stays 1),
1949 * but they do not indicate that embedded SRAM is restored yet;
1950 * HW with volatile SRAM must save/restore contents to/from
1951 * host DRAM when sleeping/waking for power-saving.
1952 * Each direction takes approximately 1/4 millisecond; with this
1953 * overhead, it's a good idea to grab and hold MAC_ACCESS_REQUEST if a
1954 * series of register accesses are expected (e.g. reading Event Log),
1955 * to keep device from sleeping.
1956 *
1957 * CSR_UCODE_DRV_GP1 register bit MAC_SLEEP == 0 indicates that
1958 * SRAM is okay/restored. We don't check that here because this call
1959 * is just for hardware register access; but GP1 MAC_SLEEP
1960 * check is a good idea before accessing the SRAM of HW with
1961 * volatile SRAM (e.g. reading Event Log).
1962 *
1963 * 5000 series and later (including 1000 series) have non-volatile SRAM,
1964 * and do not save/restore SRAM when power cycling.
1965 */
1966 ret = iwl_poll_bit(trans, CSR_GP_CNTRL,
1967 CSR_GP_CNTRL_REG_VAL_MAC_ACCESS_EN,
1968 (CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY |
1969 CSR_GP_CNTRL_REG_FLAG_GOING_TO_SLEEP), 15000);
1970 if (unlikely(ret < 0)) {
1971 iwl_trans_pcie_dump_regs(trans);
1972 iwl_write32(trans, CSR_RESET, CSR_RESET_REG_FLAG_FORCE_NMI);
1973 WARN_ONCE(1,
1974 "Timeout waiting for hardware access (CSR_GP_CNTRL 0x%08x)\n",
1975 iwl_read32(trans, CSR_GP_CNTRL));
1976 spin_unlock_irqrestore(&trans_pcie->reg_lock, *flags);
1977 return false;
1978 }
1979
1980out:
1981 /*
1982 * Fool sparse by faking we release the lock - sparse will
1983 * track nic_access anyway.
1984 */
1985 __release(&trans_pcie->reg_lock);
1986 return true;
1987}
1988
1989static void iwl_trans_pcie_release_nic_access(struct iwl_trans *trans,
1990 unsigned long *flags)
1991{
1992 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1993
1994 lockdep_assert_held(&trans_pcie->reg_lock);
1995
1996 /*
1997 * Fool sparse by faking we acquiring the lock - sparse will
1998 * track nic_access anyway.
1999 */
2000 __acquire(&trans_pcie->reg_lock);
2001
2002 if (trans_pcie->cmd_hold_nic_awake)
2003 goto out;
2004
2005 __iwl_trans_pcie_clear_bit(trans, CSR_GP_CNTRL,
2006 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2007 /*
2008 * Above we read the CSR_GP_CNTRL register, which will flush
2009 * any previous writes, but we need the write that clears the
2010 * MAC_ACCESS_REQ bit to be performed before any other writes
2011 * scheduled on different CPUs (after we drop reg_lock).
2012 */
2013 mmiowb();
2014out:
2015 spin_unlock_irqrestore(&trans_pcie->reg_lock, *flags);
2016}
2017
2018static int iwl_trans_pcie_read_mem(struct iwl_trans *trans, u32 addr,
2019 void *buf, int dwords)
2020{
2021 unsigned long flags;
2022 int offs, ret = 0;
2023 u32 *vals = buf;
2024
2025 if (iwl_trans_grab_nic_access(trans, &flags)) {
2026 iwl_write32(trans, HBUS_TARG_MEM_RADDR, addr);
2027 for (offs = 0; offs < dwords; offs++)
2028 vals[offs] = iwl_read32(trans, HBUS_TARG_MEM_RDAT);
2029 iwl_trans_release_nic_access(trans, &flags);
2030 } else {
2031 ret = -EBUSY;
2032 }
2033 return ret;
2034}
2035
2036static int iwl_trans_pcie_write_mem(struct iwl_trans *trans, u32 addr,
2037 const void *buf, int dwords)
2038{
2039 unsigned long flags;
2040 int offs, ret = 0;
2041 const u32 *vals = buf;
2042
2043 if (iwl_trans_grab_nic_access(trans, &flags)) {
2044 iwl_write32(trans, HBUS_TARG_MEM_WADDR, addr);
2045 for (offs = 0; offs < dwords; offs++)
2046 iwl_write32(trans, HBUS_TARG_MEM_WDAT,
2047 vals ? vals[offs] : 0);
2048 iwl_trans_release_nic_access(trans, &flags);
2049 } else {
2050 ret = -EBUSY;
2051 }
2052 return ret;
2053}
2054
2055static void iwl_trans_pcie_freeze_txq_timer(struct iwl_trans *trans,
2056 unsigned long txqs,
2057 bool freeze)
2058{
2059 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2060 int queue;
2061
2062 for_each_set_bit(queue, &txqs, BITS_PER_LONG) {
2063 struct iwl_txq *txq = trans_pcie->txq[queue];
2064 unsigned long now;
2065
2066 spin_lock_bh(&txq->lock);
2067
2068 now = jiffies;
2069
2070 if (txq->frozen == freeze)
2071 goto next_queue;
2072
2073 IWL_DEBUG_TX_QUEUES(trans, "%s TXQ %d\n",
2074 freeze ? "Freezing" : "Waking", queue);
2075
2076 txq->frozen = freeze;
2077
2078 if (txq->read_ptr == txq->write_ptr)
2079 goto next_queue;
2080
2081 if (freeze) {
2082 if (unlikely(time_after(now,
2083 txq->stuck_timer.expires))) {
2084 /*
2085 * The timer should have fired, maybe it is
2086 * spinning right now on the lock.
2087 */
2088 goto next_queue;
2089 }
2090 /* remember how long until the timer fires */
2091 txq->frozen_expiry_remainder =
2092 txq->stuck_timer.expires - now;
2093 del_timer(&txq->stuck_timer);
2094 goto next_queue;
2095 }
2096
2097 /*
2098 * Wake a non-empty queue -> arm timer with the
2099 * remainder before it froze
2100 */
2101 mod_timer(&txq->stuck_timer,
2102 now + txq->frozen_expiry_remainder);
2103
2104next_queue:
2105 spin_unlock_bh(&txq->lock);
2106 }
2107}
2108
2109static void iwl_trans_pcie_block_txq_ptrs(struct iwl_trans *trans, bool block)
2110{
2111 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2112 int i;
2113
2114 for (i = 0; i < trans->cfg->base_params->num_of_queues; i++) {
2115 struct iwl_txq *txq = trans_pcie->txq[i];
2116
2117 if (i == trans_pcie->cmd_queue)
2118 continue;
2119
2120 spin_lock_bh(&txq->lock);
2121
2122 if (!block && !(WARN_ON_ONCE(!txq->block))) {
2123 txq->block--;
2124 if (!txq->block) {
2125 iwl_write32(trans, HBUS_TARG_WRPTR,
2126 txq->write_ptr | (i << 8));
2127 }
2128 } else if (block) {
2129 txq->block++;
2130 }
2131
2132 spin_unlock_bh(&txq->lock);
2133 }
2134}
2135
2136#define IWL_FLUSH_WAIT_MS 2000
2137
2138void iwl_trans_pcie_log_scd_error(struct iwl_trans *trans, struct iwl_txq *txq)
2139{
2140 u32 txq_id = txq->id;
2141 u32 status;
2142 bool active;
2143 u8 fifo;
2144
2145 if (trans->cfg->use_tfh) {
2146 IWL_ERR(trans, "Queue %d is stuck %d %d\n", txq_id,
2147 txq->read_ptr, txq->write_ptr);
2148 /* TODO: access new SCD registers and dump them */
2149 return;
2150 }
2151
2152 status = iwl_read_prph(trans, SCD_QUEUE_STATUS_BITS(txq_id));
2153 fifo = (status >> SCD_QUEUE_STTS_REG_POS_TXF) & 0x7;
2154 active = !!(status & BIT(SCD_QUEUE_STTS_REG_POS_ACTIVE));
2155
2156 IWL_ERR(trans,
2157 "Queue %d is %sactive on fifo %d and stuck for %u ms. SW [%d, %d] HW [%d, %d] FH TRB=0x0%x\n",
2158 txq_id, active ? "" : "in", fifo,
2159 jiffies_to_msecs(txq->wd_timeout),
2160 txq->read_ptr, txq->write_ptr,
2161 iwl_read_prph(trans, SCD_QUEUE_RDPTR(txq_id)) &
2162 (TFD_QUEUE_SIZE_MAX - 1),
2163 iwl_read_prph(trans, SCD_QUEUE_WRPTR(txq_id)) &
2164 (TFD_QUEUE_SIZE_MAX - 1),
2165 iwl_read_direct32(trans, FH_TX_TRB_REG(fifo)));
2166}
2167
2168static int iwl_trans_pcie_wait_txq_empty(struct iwl_trans *trans, int txq_idx)
2169{
2170 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2171 struct iwl_txq *txq;
2172 unsigned long now = jiffies;
2173 u8 wr_ptr;
2174
2175 if (!test_bit(txq_idx, trans_pcie->queue_used))
2176 return -EINVAL;
2177
2178 IWL_DEBUG_TX_QUEUES(trans, "Emptying queue %d...\n", txq_idx);
2179 txq = trans_pcie->txq[txq_idx];
2180 wr_ptr = READ_ONCE(txq->write_ptr);
2181
2182 while (txq->read_ptr != READ_ONCE(txq->write_ptr) &&
2183 !time_after(jiffies,
2184 now + msecs_to_jiffies(IWL_FLUSH_WAIT_MS))) {
2185 u8 write_ptr = READ_ONCE(txq->write_ptr);
2186
2187 if (WARN_ONCE(wr_ptr != write_ptr,
2188 "WR pointer moved while flushing %d -> %d\n",
2189 wr_ptr, write_ptr))
2190 return -ETIMEDOUT;
2191 usleep_range(1000, 2000);
2192 }
2193
2194 if (txq->read_ptr != txq->write_ptr) {
2195 IWL_ERR(trans,
2196 "fail to flush all tx fifo queues Q %d\n", txq_idx);
2197 iwl_trans_pcie_log_scd_error(trans, txq);
2198 return -ETIMEDOUT;
2199 }
2200
2201 IWL_DEBUG_TX_QUEUES(trans, "Queue %d is now empty.\n", txq_idx);
2202
2203 return 0;
2204}
2205
2206static int iwl_trans_pcie_wait_txqs_empty(struct iwl_trans *trans, u32 txq_bm)
2207{
2208 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2209 int cnt;
2210 int ret = 0;
2211
2212 /* waiting for all the tx frames complete might take a while */
2213 for (cnt = 0; cnt < trans->cfg->base_params->num_of_queues; cnt++) {
2214
2215 if (cnt == trans_pcie->cmd_queue)
2216 continue;
2217 if (!test_bit(cnt, trans_pcie->queue_used))
2218 continue;
2219 if (!(BIT(cnt) & txq_bm))
2220 continue;
2221
2222 ret = iwl_trans_pcie_wait_txq_empty(trans, cnt);
2223 if (ret)
2224 break;
2225 }
2226
2227 return ret;
2228}
2229
2230static void iwl_trans_pcie_set_bits_mask(struct iwl_trans *trans, u32 reg,
2231 u32 mask, u32 value)
2232{
2233 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2234 unsigned long flags;
2235
2236 spin_lock_irqsave(&trans_pcie->reg_lock, flags);
2237 __iwl_trans_pcie_set_bits_mask(trans, reg, mask, value);
2238 spin_unlock_irqrestore(&trans_pcie->reg_lock, flags);
2239}
2240
2241static void iwl_trans_pcie_ref(struct iwl_trans *trans)
2242{
2243 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2244
2245 if (iwlwifi_mod_params.d0i3_disable)
2246 return;
2247
2248 pm_runtime_get(&trans_pcie->pci_dev->dev);
2249
2250#ifdef CONFIG_PM
2251 IWL_DEBUG_RPM(trans, "runtime usage count: %d\n",
2252 atomic_read(&trans_pcie->pci_dev->dev.power.usage_count));
2253#endif /* CONFIG_PM */
2254}
2255
2256static void iwl_trans_pcie_unref(struct iwl_trans *trans)
2257{
2258 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2259
2260 if (iwlwifi_mod_params.d0i3_disable)
2261 return;
2262
2263 pm_runtime_mark_last_busy(&trans_pcie->pci_dev->dev);
2264 pm_runtime_put_autosuspend(&trans_pcie->pci_dev->dev);
2265
2266#ifdef CONFIG_PM
2267 IWL_DEBUG_RPM(trans, "runtime usage count: %d\n",
2268 atomic_read(&trans_pcie->pci_dev->dev.power.usage_count));
2269#endif /* CONFIG_PM */
2270}
2271
2272static const char *get_csr_string(int cmd)
2273{
2274#define IWL_CMD(x) case x: return #x
2275 switch (cmd) {
2276 IWL_CMD(CSR_HW_IF_CONFIG_REG);
2277 IWL_CMD(CSR_INT_COALESCING);
2278 IWL_CMD(CSR_INT);
2279 IWL_CMD(CSR_INT_MASK);
2280 IWL_CMD(CSR_FH_INT_STATUS);
2281 IWL_CMD(CSR_GPIO_IN);
2282 IWL_CMD(CSR_RESET);
2283 IWL_CMD(CSR_GP_CNTRL);
2284 IWL_CMD(CSR_HW_REV);
2285 IWL_CMD(CSR_EEPROM_REG);
2286 IWL_CMD(CSR_EEPROM_GP);
2287 IWL_CMD(CSR_OTP_GP_REG);
2288 IWL_CMD(CSR_GIO_REG);
2289 IWL_CMD(CSR_GP_UCODE_REG);
2290 IWL_CMD(CSR_GP_DRIVER_REG);
2291 IWL_CMD(CSR_UCODE_DRV_GP1);
2292 IWL_CMD(CSR_UCODE_DRV_GP2);
2293 IWL_CMD(CSR_LED_REG);
2294 IWL_CMD(CSR_DRAM_INT_TBL_REG);
2295 IWL_CMD(CSR_GIO_CHICKEN_BITS);
2296 IWL_CMD(CSR_ANA_PLL_CFG);
2297 IWL_CMD(CSR_HW_REV_WA_REG);
2298 IWL_CMD(CSR_MONITOR_STATUS_REG);
2299 IWL_CMD(CSR_DBG_HPET_MEM_REG);
2300 default:
2301 return "UNKNOWN";
2302 }
2303#undef IWL_CMD
2304}
2305
2306void iwl_pcie_dump_csr(struct iwl_trans *trans)
2307{
2308 int i;
2309 static const u32 csr_tbl[] = {
2310 CSR_HW_IF_CONFIG_REG,
2311 CSR_INT_COALESCING,
2312 CSR_INT,
2313 CSR_INT_MASK,
2314 CSR_FH_INT_STATUS,
2315 CSR_GPIO_IN,
2316 CSR_RESET,
2317 CSR_GP_CNTRL,
2318 CSR_HW_REV,
2319 CSR_EEPROM_REG,
2320 CSR_EEPROM_GP,
2321 CSR_OTP_GP_REG,
2322 CSR_GIO_REG,
2323 CSR_GP_UCODE_REG,
2324 CSR_GP_DRIVER_REG,
2325 CSR_UCODE_DRV_GP1,
2326 CSR_UCODE_DRV_GP2,
2327 CSR_LED_REG,
2328 CSR_DRAM_INT_TBL_REG,
2329 CSR_GIO_CHICKEN_BITS,
2330 CSR_ANA_PLL_CFG,
2331 CSR_MONITOR_STATUS_REG,
2332 CSR_HW_REV_WA_REG,
2333 CSR_DBG_HPET_MEM_REG
2334 };
2335 IWL_ERR(trans, "CSR values:\n");
2336 IWL_ERR(trans, "(2nd byte of CSR_INT_COALESCING is "
2337 "CSR_INT_PERIODIC_REG)\n");
2338 for (i = 0; i < ARRAY_SIZE(csr_tbl); i++) {
2339 IWL_ERR(trans, " %25s: 0X%08x\n",
2340 get_csr_string(csr_tbl[i]),
2341 iwl_read32(trans, csr_tbl[i]));
2342 }
2343}
2344
2345#ifdef CONFIG_IWLWIFI_DEBUGFS
2346/* create and remove of files */
2347#define DEBUGFS_ADD_FILE(name, parent, mode) do { \
2348 if (!debugfs_create_file(#name, mode, parent, trans, \
2349 &iwl_dbgfs_##name##_ops)) \
2350 goto err; \
2351} while (0)
2352
2353/* file operation */
2354#define DEBUGFS_READ_FILE_OPS(name) \
2355static const struct file_operations iwl_dbgfs_##name##_ops = { \
2356 .read = iwl_dbgfs_##name##_read, \
2357 .open = simple_open, \
2358 .llseek = generic_file_llseek, \
2359};
2360
2361#define DEBUGFS_WRITE_FILE_OPS(name) \
2362static const struct file_operations iwl_dbgfs_##name##_ops = { \
2363 .write = iwl_dbgfs_##name##_write, \
2364 .open = simple_open, \
2365 .llseek = generic_file_llseek, \
2366};
2367
2368#define DEBUGFS_READ_WRITE_FILE_OPS(name) \
2369static const struct file_operations iwl_dbgfs_##name##_ops = { \
2370 .write = iwl_dbgfs_##name##_write, \
2371 .read = iwl_dbgfs_##name##_read, \
2372 .open = simple_open, \
2373 .llseek = generic_file_llseek, \
2374};
2375
2376static ssize_t iwl_dbgfs_tx_queue_read(struct file *file,
2377 char __user *user_buf,
2378 size_t count, loff_t *ppos)
2379{
2380 struct iwl_trans *trans = file->private_data;
2381 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2382 struct iwl_txq *txq;
2383 char *buf;
2384 int pos = 0;
2385 int cnt;
2386 int ret;
2387 size_t bufsz;
2388
2389 bufsz = sizeof(char) * 75 * trans->cfg->base_params->num_of_queues;
2390
2391 if (!trans_pcie->txq_memory)
2392 return -EAGAIN;
2393
2394 buf = kzalloc(bufsz, GFP_KERNEL);
2395 if (!buf)
2396 return -ENOMEM;
2397
2398 for (cnt = 0; cnt < trans->cfg->base_params->num_of_queues; cnt++) {
2399 txq = trans_pcie->txq[cnt];
2400 pos += scnprintf(buf + pos, bufsz - pos,
2401 "hwq %.2d: read=%u write=%u use=%d stop=%d need_update=%d frozen=%d%s\n",
2402 cnt, txq->read_ptr, txq->write_ptr,
2403 !!test_bit(cnt, trans_pcie->queue_used),
2404 !!test_bit(cnt, trans_pcie->queue_stopped),
2405 txq->need_update, txq->frozen,
2406 (cnt == trans_pcie->cmd_queue ? " HCMD" : ""));
2407 }
2408 ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
2409 kfree(buf);
2410 return ret;
2411}
2412
2413static ssize_t iwl_dbgfs_rx_queue_read(struct file *file,
2414 char __user *user_buf,
2415 size_t count, loff_t *ppos)
2416{
2417 struct iwl_trans *trans = file->private_data;
2418 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2419 char *buf;
2420 int pos = 0, i, ret;
2421 size_t bufsz = sizeof(buf);
2422
2423 bufsz = sizeof(char) * 121 * trans->num_rx_queues;
2424
2425 if (!trans_pcie->rxq)
2426 return -EAGAIN;
2427
2428 buf = kzalloc(bufsz, GFP_KERNEL);
2429 if (!buf)
2430 return -ENOMEM;
2431
2432 for (i = 0; i < trans->num_rx_queues && pos < bufsz; i++) {
2433 struct iwl_rxq *rxq = &trans_pcie->rxq[i];
2434
2435 pos += scnprintf(buf + pos, bufsz - pos, "queue#: %2d\n",
2436 i);
2437 pos += scnprintf(buf + pos, bufsz - pos, "\tread: %u\n",
2438 rxq->read);
2439 pos += scnprintf(buf + pos, bufsz - pos, "\twrite: %u\n",
2440 rxq->write);
2441 pos += scnprintf(buf + pos, bufsz - pos, "\twrite_actual: %u\n",
2442 rxq->write_actual);
2443 pos += scnprintf(buf + pos, bufsz - pos, "\tneed_update: %2d\n",
2444 rxq->need_update);
2445 pos += scnprintf(buf + pos, bufsz - pos, "\tfree_count: %u\n",
2446 rxq->free_count);
2447 if (rxq->rb_stts) {
2448 pos += scnprintf(buf + pos, bufsz - pos,
2449 "\tclosed_rb_num: %u\n",
2450 le16_to_cpu(rxq->rb_stts->closed_rb_num) &
2451 0x0FFF);
2452 } else {
2453 pos += scnprintf(buf + pos, bufsz - pos,
2454 "\tclosed_rb_num: Not Allocated\n");
2455 }
2456 }
2457 ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
2458 kfree(buf);
2459
2460 return ret;
2461}
2462
2463static ssize_t iwl_dbgfs_interrupt_read(struct file *file,
2464 char __user *user_buf,
2465 size_t count, loff_t *ppos)
2466{
2467 struct iwl_trans *trans = file->private_data;
2468 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2469 struct isr_statistics *isr_stats = &trans_pcie->isr_stats;
2470
2471 int pos = 0;
2472 char *buf;
2473 int bufsz = 24 * 64; /* 24 items * 64 char per item */
2474 ssize_t ret;
2475
2476 buf = kzalloc(bufsz, GFP_KERNEL);
2477 if (!buf)
2478 return -ENOMEM;
2479
2480 pos += scnprintf(buf + pos, bufsz - pos,
2481 "Interrupt Statistics Report:\n");
2482
2483 pos += scnprintf(buf + pos, bufsz - pos, "HW Error:\t\t\t %u\n",
2484 isr_stats->hw);
2485 pos += scnprintf(buf + pos, bufsz - pos, "SW Error:\t\t\t %u\n",
2486 isr_stats->sw);
2487 if (isr_stats->sw || isr_stats->hw) {
2488 pos += scnprintf(buf + pos, bufsz - pos,
2489 "\tLast Restarting Code: 0x%X\n",
2490 isr_stats->err_code);
2491 }
2492#ifdef CONFIG_IWLWIFI_DEBUG
2493 pos += scnprintf(buf + pos, bufsz - pos, "Frame transmitted:\t\t %u\n",
2494 isr_stats->sch);
2495 pos += scnprintf(buf + pos, bufsz - pos, "Alive interrupt:\t\t %u\n",
2496 isr_stats->alive);
2497#endif
2498 pos += scnprintf(buf + pos, bufsz - pos,
2499 "HW RF KILL switch toggled:\t %u\n", isr_stats->rfkill);
2500
2501 pos += scnprintf(buf + pos, bufsz - pos, "CT KILL:\t\t\t %u\n",
2502 isr_stats->ctkill);
2503
2504 pos += scnprintf(buf + pos, bufsz - pos, "Wakeup Interrupt:\t\t %u\n",
2505 isr_stats->wakeup);
2506
2507 pos += scnprintf(buf + pos, bufsz - pos,
2508 "Rx command responses:\t\t %u\n", isr_stats->rx);
2509
2510 pos += scnprintf(buf + pos, bufsz - pos, "Tx/FH interrupt:\t\t %u\n",
2511 isr_stats->tx);
2512
2513 pos += scnprintf(buf + pos, bufsz - pos, "Unexpected INTA:\t\t %u\n",
2514 isr_stats->unhandled);
2515
2516 ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
2517 kfree(buf);
2518 return ret;
2519}
2520
2521static ssize_t iwl_dbgfs_interrupt_write(struct file *file,
2522 const char __user *user_buf,
2523 size_t count, loff_t *ppos)
2524{
2525 struct iwl_trans *trans = file->private_data;
2526 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2527 struct isr_statistics *isr_stats = &trans_pcie->isr_stats;
2528 u32 reset_flag;
2529 int ret;
2530
2531 ret = kstrtou32_from_user(user_buf, count, 16, &reset_flag);
2532 if (ret)
2533 return ret;
2534 if (reset_flag == 0)
2535 memset(isr_stats, 0, sizeof(*isr_stats));
2536
2537 return count;
2538}
2539
2540static ssize_t iwl_dbgfs_csr_write(struct file *file,
2541 const char __user *user_buf,
2542 size_t count, loff_t *ppos)
2543{
2544 struct iwl_trans *trans = file->private_data;
2545
2546 iwl_pcie_dump_csr(trans);
2547
2548 return count;
2549}
2550
2551static ssize_t iwl_dbgfs_fh_reg_read(struct file *file,
2552 char __user *user_buf,
2553 size_t count, loff_t *ppos)
2554{
2555 struct iwl_trans *trans = file->private_data;
2556 char *buf = NULL;
2557 ssize_t ret;
2558
2559 ret = iwl_dump_fh(trans, &buf);
2560 if (ret < 0)
2561 return ret;
2562 if (!buf)
2563 return -EINVAL;
2564 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
2565 kfree(buf);
2566 return ret;
2567}
2568
2569static ssize_t iwl_dbgfs_rfkill_read(struct file *file,
2570 char __user *user_buf,
2571 size_t count, loff_t *ppos)
2572{
2573 struct iwl_trans *trans = file->private_data;
2574 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2575 char buf[100];
2576 int pos;
2577
2578 pos = scnprintf(buf, sizeof(buf), "debug: %d\nhw: %d\n",
2579 trans_pcie->debug_rfkill,
2580 !(iwl_read32(trans, CSR_GP_CNTRL) &
2581 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW));
2582
2583 return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
2584}
2585
2586static ssize_t iwl_dbgfs_rfkill_write(struct file *file,
2587 const char __user *user_buf,
2588 size_t count, loff_t *ppos)
2589{
2590 struct iwl_trans *trans = file->private_data;
2591 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2592 bool old = trans_pcie->debug_rfkill;
2593 int ret;
2594
2595 ret = kstrtobool_from_user(user_buf, count, &trans_pcie->debug_rfkill);
2596 if (ret)
2597 return ret;
2598 if (old == trans_pcie->debug_rfkill)
2599 return count;
2600 IWL_WARN(trans, "changing debug rfkill %d->%d\n",
2601 old, trans_pcie->debug_rfkill);
2602 iwl_pcie_handle_rfkill_irq(trans);
2603
2604 return count;
2605}
2606
2607DEBUGFS_READ_WRITE_FILE_OPS(interrupt);
2608DEBUGFS_READ_FILE_OPS(fh_reg);
2609DEBUGFS_READ_FILE_OPS(rx_queue);
2610DEBUGFS_READ_FILE_OPS(tx_queue);
2611DEBUGFS_WRITE_FILE_OPS(csr);
2612DEBUGFS_READ_WRITE_FILE_OPS(rfkill);
2613
2614/* Create the debugfs files and directories */
2615int iwl_trans_pcie_dbgfs_register(struct iwl_trans *trans)
2616{
2617 struct dentry *dir = trans->dbgfs_dir;
2618
2619 DEBUGFS_ADD_FILE(rx_queue, dir, 0400);
2620 DEBUGFS_ADD_FILE(tx_queue, dir, 0400);
2621 DEBUGFS_ADD_FILE(interrupt, dir, 0600);
2622 DEBUGFS_ADD_FILE(csr, dir, 0200);
2623 DEBUGFS_ADD_FILE(fh_reg, dir, 0400);
2624 DEBUGFS_ADD_FILE(rfkill, dir, 0600);
2625 return 0;
2626
2627err:
2628 IWL_ERR(trans, "failed to create the trans debugfs entry\n");
2629 return -ENOMEM;
2630}
2631#endif /*CONFIG_IWLWIFI_DEBUGFS */
2632
2633static u32 iwl_trans_pcie_get_cmdlen(struct iwl_trans *trans, void *tfd)
2634{
2635 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2636 u32 cmdlen = 0;
2637 int i;
2638
2639 for (i = 0; i < trans_pcie->max_tbs; i++)
2640 cmdlen += iwl_pcie_tfd_tb_get_len(trans, tfd, i);
2641
2642 return cmdlen;
2643}
2644
2645static u32 iwl_trans_pcie_dump_rbs(struct iwl_trans *trans,
2646 struct iwl_fw_error_dump_data **data,
2647 int allocated_rb_nums)
2648{
2649 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2650 int max_len = PAGE_SIZE << trans_pcie->rx_page_order;
2651 /* Dump RBs is supported only for pre-9000 devices (1 queue) */
2652 struct iwl_rxq *rxq = &trans_pcie->rxq[0];
2653 u32 i, r, j, rb_len = 0;
2654
2655 spin_lock(&rxq->lock);
2656
2657 r = le16_to_cpu(READ_ONCE(rxq->rb_stts->closed_rb_num)) & 0x0FFF;
2658
2659 for (i = rxq->read, j = 0;
2660 i != r && j < allocated_rb_nums;
2661 i = (i + 1) & RX_QUEUE_MASK, j++) {
2662 struct iwl_rx_mem_buffer *rxb = rxq->queue[i];
2663 struct iwl_fw_error_dump_rb *rb;
2664
2665 dma_unmap_page(trans->dev, rxb->page_dma, max_len,
2666 DMA_FROM_DEVICE);
2667
2668 rb_len += sizeof(**data) + sizeof(*rb) + max_len;
2669
2670 (*data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_RB);
2671 (*data)->len = cpu_to_le32(sizeof(*rb) + max_len);
2672 rb = (void *)(*data)->data;
2673 rb->index = cpu_to_le32(i);
2674 memcpy(rb->data, page_address(rxb->page), max_len);
2675 /* remap the page for the free benefit */
2676 rxb->page_dma = dma_map_page(trans->dev, rxb->page, 0,
2677 max_len,
2678 DMA_FROM_DEVICE);
2679
2680 *data = iwl_fw_error_next_data(*data);
2681 }
2682
2683 spin_unlock(&rxq->lock);
2684
2685 return rb_len;
2686}
2687#define IWL_CSR_TO_DUMP (0x250)
2688
2689static u32 iwl_trans_pcie_dump_csr(struct iwl_trans *trans,
2690 struct iwl_fw_error_dump_data **data)
2691{
2692 u32 csr_len = sizeof(**data) + IWL_CSR_TO_DUMP;
2693 __le32 *val;
2694 int i;
2695
2696 (*data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_CSR);
2697 (*data)->len = cpu_to_le32(IWL_CSR_TO_DUMP);
2698 val = (void *)(*data)->data;
2699
2700 for (i = 0; i < IWL_CSR_TO_DUMP; i += 4)
2701 *val++ = cpu_to_le32(iwl_trans_pcie_read32(trans, i));
2702
2703 *data = iwl_fw_error_next_data(*data);
2704
2705 return csr_len;
2706}
2707
2708static u32 iwl_trans_pcie_fh_regs_dump(struct iwl_trans *trans,
2709 struct iwl_fw_error_dump_data **data)
2710{
2711 u32 fh_regs_len = FH_MEM_UPPER_BOUND - FH_MEM_LOWER_BOUND;
2712 unsigned long flags;
2713 __le32 *val;
2714 int i;
2715
2716 if (!iwl_trans_grab_nic_access(trans, &flags))
2717 return 0;
2718
2719 (*data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_FH_REGS);
2720 (*data)->len = cpu_to_le32(fh_regs_len);
2721 val = (void *)(*data)->data;
2722
2723 if (!trans->cfg->gen2)
2724 for (i = FH_MEM_LOWER_BOUND; i < FH_MEM_UPPER_BOUND;
2725 i += sizeof(u32))
2726 *val++ = cpu_to_le32(iwl_trans_pcie_read32(trans, i));
2727 else
2728 for (i = FH_MEM_LOWER_BOUND_GEN2; i < FH_MEM_UPPER_BOUND_GEN2;
2729 i += sizeof(u32))
2730 *val++ = cpu_to_le32(iwl_trans_pcie_read_prph(trans,
2731 i));
2732
2733 iwl_trans_release_nic_access(trans, &flags);
2734
2735 *data = iwl_fw_error_next_data(*data);
2736
2737 return sizeof(**data) + fh_regs_len;
2738}
2739
2740static u32
2741iwl_trans_pci_dump_marbh_monitor(struct iwl_trans *trans,
2742 struct iwl_fw_error_dump_fw_mon *fw_mon_data,
2743 u32 monitor_len)
2744{
2745 u32 buf_size_in_dwords = (monitor_len >> 2);
2746 u32 *buffer = (u32 *)fw_mon_data->data;
2747 unsigned long flags;
2748 u32 i;
2749
2750 if (!iwl_trans_grab_nic_access(trans, &flags))
2751 return 0;
2752
2753 iwl_write_prph_no_grab(trans, MON_DMARB_RD_CTL_ADDR, 0x1);
2754 for (i = 0; i < buf_size_in_dwords; i++)
2755 buffer[i] = iwl_read_prph_no_grab(trans,
2756 MON_DMARB_RD_DATA_ADDR);
2757 iwl_write_prph_no_grab(trans, MON_DMARB_RD_CTL_ADDR, 0x0);
2758
2759 iwl_trans_release_nic_access(trans, &flags);
2760
2761 return monitor_len;
2762}
2763
2764static u32
2765iwl_trans_pcie_dump_monitor(struct iwl_trans *trans,
2766 struct iwl_fw_error_dump_data **data,
2767 u32 monitor_len)
2768{
2769 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2770 u32 len = 0;
2771
2772 if ((trans_pcie->fw_mon_page &&
2773 trans->cfg->device_family == IWL_DEVICE_FAMILY_7000) ||
2774 trans->dbg_dest_tlv) {
2775 struct iwl_fw_error_dump_fw_mon *fw_mon_data;
2776 u32 base, write_ptr, wrap_cnt;
2777
2778 /* If there was a dest TLV - use the values from there */
2779 if (trans->dbg_dest_tlv) {
2780 write_ptr =
2781 le32_to_cpu(trans->dbg_dest_tlv->write_ptr_reg);
2782 wrap_cnt = le32_to_cpu(trans->dbg_dest_tlv->wrap_count);
2783 base = le32_to_cpu(trans->dbg_dest_tlv->base_reg);
2784 } else {
2785 base = MON_BUFF_BASE_ADDR;
2786 write_ptr = MON_BUFF_WRPTR;
2787 wrap_cnt = MON_BUFF_CYCLE_CNT;
2788 }
2789
2790 (*data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_FW_MONITOR);
2791 fw_mon_data = (void *)(*data)->data;
2792 fw_mon_data->fw_mon_wr_ptr =
2793 cpu_to_le32(iwl_read_prph(trans, write_ptr));
2794 fw_mon_data->fw_mon_cycle_cnt =
2795 cpu_to_le32(iwl_read_prph(trans, wrap_cnt));
2796 fw_mon_data->fw_mon_base_ptr =
2797 cpu_to_le32(iwl_read_prph(trans, base));
2798
2799 len += sizeof(**data) + sizeof(*fw_mon_data);
2800 if (trans_pcie->fw_mon_page) {
2801 /*
2802 * The firmware is now asserted, it won't write anything
2803 * to the buffer. CPU can take ownership to fetch the
2804 * data. The buffer will be handed back to the device
2805 * before the firmware will be restarted.
2806 */
2807 dma_sync_single_for_cpu(trans->dev,
2808 trans_pcie->fw_mon_phys,
2809 trans_pcie->fw_mon_size,
2810 DMA_FROM_DEVICE);
2811 memcpy(fw_mon_data->data,
2812 page_address(trans_pcie->fw_mon_page),
2813 trans_pcie->fw_mon_size);
2814
2815 monitor_len = trans_pcie->fw_mon_size;
2816 } else if (trans->dbg_dest_tlv->monitor_mode == SMEM_MODE) {
2817 /*
2818 * Update pointers to reflect actual values after
2819 * shifting
2820 */
2821 if (trans->dbg_dest_tlv->version) {
2822 base = (iwl_read_prph(trans, base) &
2823 IWL_LDBG_M2S_BUF_BA_MSK) <<
2824 trans->dbg_dest_tlv->base_shift;
2825 base *= IWL_M2S_UNIT_SIZE;
2826 base += trans->cfg->smem_offset;
2827 } else {
2828 base = iwl_read_prph(trans, base) <<
2829 trans->dbg_dest_tlv->base_shift;
2830 }
2831
2832 iwl_trans_read_mem(trans, base, fw_mon_data->data,
2833 monitor_len / sizeof(u32));
2834 } else if (trans->dbg_dest_tlv->monitor_mode == MARBH_MODE) {
2835 monitor_len =
2836 iwl_trans_pci_dump_marbh_monitor(trans,
2837 fw_mon_data,
2838 monitor_len);
2839 } else {
2840 /* Didn't match anything - output no monitor data */
2841 monitor_len = 0;
2842 }
2843
2844 len += monitor_len;
2845 (*data)->len = cpu_to_le32(monitor_len + sizeof(*fw_mon_data));
2846 }
2847
2848 return len;
2849}
2850
2851static struct iwl_trans_dump_data
2852*iwl_trans_pcie_dump_data(struct iwl_trans *trans,
2853 const struct iwl_fw_dbg_trigger_tlv *trigger)
2854{
2855 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2856 struct iwl_fw_error_dump_data *data;
2857 struct iwl_txq *cmdq = trans_pcie->txq[trans_pcie->cmd_queue];
2858 struct iwl_fw_error_dump_txcmd *txcmd;
2859 struct iwl_trans_dump_data *dump_data;
2860 u32 len, num_rbs;
2861 u32 monitor_len;
2862 int i, ptr;
2863 bool dump_rbs = test_bit(STATUS_FW_ERROR, &trans->status) &&
2864 !trans->cfg->mq_rx_supported;
2865
2866 /* transport dump header */
2867 len = sizeof(*dump_data);
2868
2869 /* host commands */
2870 len += sizeof(*data) +
2871 cmdq->n_window * (sizeof(*txcmd) + TFD_MAX_PAYLOAD_SIZE);
2872
2873 /* FW monitor */
2874 if (trans_pcie->fw_mon_page) {
2875 len += sizeof(*data) + sizeof(struct iwl_fw_error_dump_fw_mon) +
2876 trans_pcie->fw_mon_size;
2877 monitor_len = trans_pcie->fw_mon_size;
2878 } else if (trans->dbg_dest_tlv) {
2879 u32 base, end, cfg_reg;
2880
2881 if (trans->dbg_dest_tlv->version == 1) {
2882 cfg_reg = le32_to_cpu(trans->dbg_dest_tlv->base_reg);
2883 cfg_reg = iwl_read_prph(trans, cfg_reg);
2884 base = (cfg_reg & IWL_LDBG_M2S_BUF_BA_MSK) <<
2885 trans->dbg_dest_tlv->base_shift;
2886 base *= IWL_M2S_UNIT_SIZE;
2887 base += trans->cfg->smem_offset;
2888
2889 monitor_len =
2890 (cfg_reg & IWL_LDBG_M2S_BUF_SIZE_MSK) >>
2891 trans->dbg_dest_tlv->end_shift;
2892 monitor_len *= IWL_M2S_UNIT_SIZE;
2893 } else {
2894 base = le32_to_cpu(trans->dbg_dest_tlv->base_reg);
2895 end = le32_to_cpu(trans->dbg_dest_tlv->end_reg);
2896
2897 base = iwl_read_prph(trans, base) <<
2898 trans->dbg_dest_tlv->base_shift;
2899 end = iwl_read_prph(trans, end) <<
2900 trans->dbg_dest_tlv->end_shift;
2901
2902 /* Make "end" point to the actual end */
2903 if (trans->cfg->device_family >=
2904 IWL_DEVICE_FAMILY_8000 ||
2905 trans->dbg_dest_tlv->monitor_mode == MARBH_MODE)
2906 end += (1 << trans->dbg_dest_tlv->end_shift);
2907 monitor_len = end - base;
2908 }
2909 len += sizeof(*data) + sizeof(struct iwl_fw_error_dump_fw_mon) +
2910 monitor_len;
2911 } else {
2912 monitor_len = 0;
2913 }
2914
2915 if (trigger && (trigger->mode & IWL_FW_DBG_TRIGGER_MONITOR_ONLY)) {
2916 dump_data = vzalloc(len);
2917 if (!dump_data)
2918 return NULL;
2919
2920 data = (void *)dump_data->data;
2921 len = iwl_trans_pcie_dump_monitor(trans, &data, monitor_len);
2922 dump_data->len = len;
2923
2924 return dump_data;
2925 }
2926
2927 /* CSR registers */
2928 len += sizeof(*data) + IWL_CSR_TO_DUMP;
2929
2930 /* FH registers */
2931 if (trans->cfg->gen2)
2932 len += sizeof(*data) +
2933 (FH_MEM_UPPER_BOUND_GEN2 - FH_MEM_LOWER_BOUND_GEN2);
2934 else
2935 len += sizeof(*data) +
2936 (FH_MEM_UPPER_BOUND - FH_MEM_LOWER_BOUND);
2937
2938 if (dump_rbs) {
2939 /* Dump RBs is supported only for pre-9000 devices (1 queue) */
2940 struct iwl_rxq *rxq = &trans_pcie->rxq[0];
2941 /* RBs */
2942 num_rbs = le16_to_cpu(READ_ONCE(rxq->rb_stts->closed_rb_num))
2943 & 0x0FFF;
2944 num_rbs = (num_rbs - rxq->read) & RX_QUEUE_MASK;
2945 len += num_rbs * (sizeof(*data) +
2946 sizeof(struct iwl_fw_error_dump_rb) +
2947 (PAGE_SIZE << trans_pcie->rx_page_order));
2948 }
2949
2950 /* Paged memory for gen2 HW */
2951 if (trans->cfg->gen2)
2952 for (i = 0; i < trans_pcie->init_dram.paging_cnt; i++)
2953 len += sizeof(*data) +
2954 sizeof(struct iwl_fw_error_dump_paging) +
2955 trans_pcie->init_dram.paging[i].size;
2956
2957 dump_data = vzalloc(len);
2958 if (!dump_data)
2959 return NULL;
2960
2961 len = 0;
2962 data = (void *)dump_data->data;
2963 data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_TXCMD);
2964 txcmd = (void *)data->data;
2965 spin_lock_bh(&cmdq->lock);
2966 ptr = cmdq->write_ptr;
2967 for (i = 0; i < cmdq->n_window; i++) {
2968 u8 idx = iwl_pcie_get_cmd_index(cmdq, ptr);
2969 u32 caplen, cmdlen;
2970
2971 cmdlen = iwl_trans_pcie_get_cmdlen(trans, cmdq->tfds +
2972 trans_pcie->tfd_size * ptr);
2973 caplen = min_t(u32, TFD_MAX_PAYLOAD_SIZE, cmdlen);
2974
2975 if (cmdlen) {
2976 len += sizeof(*txcmd) + caplen;
2977 txcmd->cmdlen = cpu_to_le32(cmdlen);
2978 txcmd->caplen = cpu_to_le32(caplen);
2979 memcpy(txcmd->data, cmdq->entries[idx].cmd, caplen);
2980 txcmd = (void *)((u8 *)txcmd->data + caplen);
2981 }
2982
2983 ptr = iwl_queue_dec_wrap(ptr);
2984 }
2985 spin_unlock_bh(&cmdq->lock);
2986
2987 data->len = cpu_to_le32(len);
2988 len += sizeof(*data);
2989 data = iwl_fw_error_next_data(data);
2990
2991 len += iwl_trans_pcie_dump_csr(trans, &data);
2992 len += iwl_trans_pcie_fh_regs_dump(trans, &data);
2993 if (dump_rbs)
2994 len += iwl_trans_pcie_dump_rbs(trans, &data, num_rbs);
2995
2996 /* Paged memory for gen2 HW */
2997 if (trans->cfg->gen2) {
2998 for (i = 0; i < trans_pcie->init_dram.paging_cnt; i++) {
2999 struct iwl_fw_error_dump_paging *paging;
3000 dma_addr_t addr =
3001 trans_pcie->init_dram.paging[i].physical;
3002 u32 page_len = trans_pcie->init_dram.paging[i].size;
3003
3004 data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_PAGING);
3005 data->len = cpu_to_le32(sizeof(*paging) + page_len);
3006 paging = (void *)data->data;
3007 paging->index = cpu_to_le32(i);
3008 dma_sync_single_for_cpu(trans->dev, addr, page_len,
3009 DMA_BIDIRECTIONAL);
3010 memcpy(paging->data,
3011 trans_pcie->init_dram.paging[i].block, page_len);
3012 data = iwl_fw_error_next_data(data);
3013
3014 len += sizeof(*data) + sizeof(*paging) + page_len;
3015 }
3016 }
3017
3018 len += iwl_trans_pcie_dump_monitor(trans, &data, monitor_len);
3019
3020 dump_data->len = len;
3021
3022 return dump_data;
3023}
3024
3025#ifdef CONFIG_PM_SLEEP
3026static int iwl_trans_pcie_suspend(struct iwl_trans *trans)
3027{
3028 if (trans->runtime_pm_mode == IWL_PLAT_PM_MODE_D0I3 &&
3029 (trans->system_pm_mode == IWL_PLAT_PM_MODE_D0I3))
3030 return iwl_pci_fw_enter_d0i3(trans);
3031
3032 return 0;
3033}
3034
3035static void iwl_trans_pcie_resume(struct iwl_trans *trans)
3036{
3037 if (trans->runtime_pm_mode == IWL_PLAT_PM_MODE_D0I3 &&
3038 (trans->system_pm_mode == IWL_PLAT_PM_MODE_D0I3))
3039 iwl_pci_fw_exit_d0i3(trans);
3040}
3041#endif /* CONFIG_PM_SLEEP */
3042
3043#define IWL_TRANS_COMMON_OPS \
3044 .op_mode_leave = iwl_trans_pcie_op_mode_leave, \
3045 .write8 = iwl_trans_pcie_write8, \
3046 .write32 = iwl_trans_pcie_write32, \
3047 .read32 = iwl_trans_pcie_read32, \
3048 .read_prph = iwl_trans_pcie_read_prph, \
3049 .write_prph = iwl_trans_pcie_write_prph, \
3050 .read_mem = iwl_trans_pcie_read_mem, \
3051 .write_mem = iwl_trans_pcie_write_mem, \
3052 .configure = iwl_trans_pcie_configure, \
3053 .set_pmi = iwl_trans_pcie_set_pmi, \
3054 .sw_reset = iwl_trans_pcie_sw_reset, \
3055 .grab_nic_access = iwl_trans_pcie_grab_nic_access, \
3056 .release_nic_access = iwl_trans_pcie_release_nic_access, \
3057 .set_bits_mask = iwl_trans_pcie_set_bits_mask, \
3058 .ref = iwl_trans_pcie_ref, \
3059 .unref = iwl_trans_pcie_unref, \
3060 .dump_data = iwl_trans_pcie_dump_data, \
3061 .dump_regs = iwl_trans_pcie_dump_regs, \
3062 .d3_suspend = iwl_trans_pcie_d3_suspend, \
3063 .d3_resume = iwl_trans_pcie_d3_resume
3064
3065#ifdef CONFIG_PM_SLEEP
3066#define IWL_TRANS_PM_OPS \
3067 .suspend = iwl_trans_pcie_suspend, \
3068 .resume = iwl_trans_pcie_resume,
3069#else
3070#define IWL_TRANS_PM_OPS
3071#endif /* CONFIG_PM_SLEEP */
3072
3073static const struct iwl_trans_ops trans_ops_pcie = {
3074 IWL_TRANS_COMMON_OPS,
3075 IWL_TRANS_PM_OPS
3076 .start_hw = iwl_trans_pcie_start_hw,
3077 .fw_alive = iwl_trans_pcie_fw_alive,
3078 .start_fw = iwl_trans_pcie_start_fw,
3079 .stop_device = iwl_trans_pcie_stop_device,
3080
3081 .send_cmd = iwl_trans_pcie_send_hcmd,
3082
3083 .tx = iwl_trans_pcie_tx,
3084 .reclaim = iwl_trans_pcie_reclaim,
3085
3086 .txq_disable = iwl_trans_pcie_txq_disable,
3087 .txq_enable = iwl_trans_pcie_txq_enable,
3088
3089 .txq_set_shared_mode = iwl_trans_pcie_txq_set_shared_mode,
3090
3091 .wait_tx_queues_empty = iwl_trans_pcie_wait_txqs_empty,
3092
3093 .freeze_txq_timer = iwl_trans_pcie_freeze_txq_timer,
3094 .block_txq_ptrs = iwl_trans_pcie_block_txq_ptrs,
3095};
3096
3097static const struct iwl_trans_ops trans_ops_pcie_gen2 = {
3098 IWL_TRANS_COMMON_OPS,
3099 IWL_TRANS_PM_OPS
3100 .start_hw = iwl_trans_pcie_start_hw,
3101 .fw_alive = iwl_trans_pcie_gen2_fw_alive,
3102 .start_fw = iwl_trans_pcie_gen2_start_fw,
3103 .stop_device = iwl_trans_pcie_gen2_stop_device,
3104
3105 .send_cmd = iwl_trans_pcie_gen2_send_hcmd,
3106
3107 .tx = iwl_trans_pcie_gen2_tx,
3108 .reclaim = iwl_trans_pcie_reclaim,
3109
3110 .txq_alloc = iwl_trans_pcie_dyn_txq_alloc,
3111 .txq_free = iwl_trans_pcie_dyn_txq_free,
3112 .wait_txq_empty = iwl_trans_pcie_wait_txq_empty,
3113};
3114
3115struct iwl_trans *iwl_trans_pcie_alloc(struct pci_dev *pdev,
3116 const struct pci_device_id *ent,
3117 const struct iwl_cfg *cfg)
3118{
3119 struct iwl_trans_pcie *trans_pcie;
3120 struct iwl_trans *trans;
3121 int ret, addr_size;
3122
3123 ret = pcim_enable_device(pdev);
3124 if (ret)
3125 return ERR_PTR(ret);
3126
3127 if (cfg->gen2)
3128 trans = iwl_trans_alloc(sizeof(struct iwl_trans_pcie),
3129 &pdev->dev, cfg, &trans_ops_pcie_gen2);
3130 else
3131 trans = iwl_trans_alloc(sizeof(struct iwl_trans_pcie),
3132 &pdev->dev, cfg, &trans_ops_pcie);
3133 if (!trans)
3134 return ERR_PTR(-ENOMEM);
3135
3136 trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
3137
3138 trans_pcie->trans = trans;
3139 trans_pcie->opmode_down = true;
3140 spin_lock_init(&trans_pcie->irq_lock);
3141 spin_lock_init(&trans_pcie->reg_lock);
3142 mutex_init(&trans_pcie->mutex);
3143 init_waitqueue_head(&trans_pcie->ucode_write_waitq);
3144 trans_pcie->tso_hdr_page = alloc_percpu(struct iwl_tso_hdr_page);
3145 if (!trans_pcie->tso_hdr_page) {
3146 ret = -ENOMEM;
3147 goto out_no_pci;
3148 }
3149
3150
3151 if (!cfg->base_params->pcie_l1_allowed) {
3152 /*
3153 * W/A - seems to solve weird behavior. We need to remove this
3154 * if we don't want to stay in L1 all the time. This wastes a
3155 * lot of power.
3156 */
3157 pci_disable_link_state(pdev, PCIE_LINK_STATE_L0S |
3158 PCIE_LINK_STATE_L1 |
3159 PCIE_LINK_STATE_CLKPM);
3160 }
3161
3162 if (cfg->use_tfh) {
3163 addr_size = 64;
3164 trans_pcie->max_tbs = IWL_TFH_NUM_TBS;
3165 trans_pcie->tfd_size = sizeof(struct iwl_tfh_tfd);
3166 } else {
3167 addr_size = 36;
3168 trans_pcie->max_tbs = IWL_NUM_OF_TBS;
3169 trans_pcie->tfd_size = sizeof(struct iwl_tfd);
3170 }
3171 trans->max_skb_frags = IWL_PCIE_MAX_FRAGS(trans_pcie);
3172
3173 pci_set_master(pdev);
3174
3175 ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(addr_size));
3176 if (!ret)
3177 ret = pci_set_consistent_dma_mask(pdev,
3178 DMA_BIT_MASK(addr_size));
3179 if (ret) {
3180 ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3181 if (!ret)
3182 ret = pci_set_consistent_dma_mask(pdev,
3183 DMA_BIT_MASK(32));
3184 /* both attempts failed: */
3185 if (ret) {
3186 dev_err(&pdev->dev, "No suitable DMA available\n");
3187 goto out_no_pci;
3188 }
3189 }
3190
3191 ret = pcim_iomap_regions_request_all(pdev, BIT(0), DRV_NAME);
3192 if (ret) {
3193 dev_err(&pdev->dev, "pcim_iomap_regions_request_all failed\n");
3194 goto out_no_pci;
3195 }
3196
3197 trans_pcie->hw_base = pcim_iomap_table(pdev)[0];
3198 if (!trans_pcie->hw_base) {
3199 dev_err(&pdev->dev, "pcim_iomap_table failed\n");
3200 ret = -ENODEV;
3201 goto out_no_pci;
3202 }
3203
3204 /* We disable the RETRY_TIMEOUT register (0x41) to keep
3205 * PCI Tx retries from interfering with C3 CPU state */
3206 pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
3207
3208 trans_pcie->pci_dev = pdev;
3209 iwl_disable_interrupts(trans);
3210
3211 trans->hw_rev = iwl_read32(trans, CSR_HW_REV);
3212 /*
3213 * In the 8000 HW family the format of the 4 bytes of CSR_HW_REV have
3214 * changed, and now the revision step also includes bit 0-1 (no more
3215 * "dash" value). To keep hw_rev backwards compatible - we'll store it
3216 * in the old format.
3217 */
3218 if (trans->cfg->device_family >= IWL_DEVICE_FAMILY_8000) {
3219 unsigned long flags;
3220
3221 trans->hw_rev = (trans->hw_rev & 0xfff0) |
3222 (CSR_HW_REV_STEP(trans->hw_rev << 2) << 2);
3223
3224 ret = iwl_pcie_prepare_card_hw(trans);
3225 if (ret) {
3226 IWL_WARN(trans, "Exit HW not ready\n");
3227 goto out_no_pci;
3228 }
3229
3230 /*
3231 * in-order to recognize C step driver should read chip version
3232 * id located at the AUX bus MISC address space.
3233 */
3234 iwl_set_bit(trans, CSR_GP_CNTRL,
3235 CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
3236 udelay(2);
3237
3238 ret = iwl_poll_bit(trans, CSR_GP_CNTRL,
3239 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
3240 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
3241 25000);
3242 if (ret < 0) {
3243 IWL_DEBUG_INFO(trans, "Failed to wake up the nic\n");
3244 goto out_no_pci;
3245 }
3246
3247 if (iwl_trans_grab_nic_access(trans, &flags)) {
3248 u32 hw_step;
3249
3250 hw_step = iwl_read_prph_no_grab(trans, WFPM_CTRL_REG);
3251 hw_step |= ENABLE_WFPM;
3252 iwl_write_prph_no_grab(trans, WFPM_CTRL_REG, hw_step);
3253 hw_step = iwl_read_prph_no_grab(trans, AUX_MISC_REG);
3254 hw_step = (hw_step >> HW_STEP_LOCATION_BITS) & 0xF;
3255 if (hw_step == 0x3)
3256 trans->hw_rev = (trans->hw_rev & 0xFFFFFFF3) |
3257 (SILICON_C_STEP << 2);
3258 iwl_trans_release_nic_access(trans, &flags);
3259 }
3260 }
3261
3262 /*
3263 * 9000-series integrated A-step has a problem with suspend/resume
3264 * and sometimes even causes the whole platform to get stuck. This
3265 * workaround makes the hardware not go into the problematic state.
3266 */
3267 if (trans->cfg->integrated &&
3268 trans->cfg->device_family == IWL_DEVICE_FAMILY_9000 &&
3269 CSR_HW_REV_STEP(trans->hw_rev) == SILICON_A_STEP)
3270 iwl_set_bit(trans, CSR_HOST_CHICKEN,
3271 CSR_HOST_CHICKEN_PM_IDLE_SRC_DIS_SB_PME);
3272
3273#if IS_ENABLED(CONFIG_IWLMVM)
3274 trans->hw_rf_id = iwl_read32(trans, CSR_HW_RF_ID);
3275 if (trans->hw_rf_id == CSR_HW_RF_ID_TYPE_HR) {
3276 u32 hw_status;
3277
3278 hw_status = iwl_read_prph(trans, UMAG_GEN_HW_STATUS);
3279 if (hw_status & UMAG_GEN_HW_IS_FPGA)
3280 trans->cfg = &iwl22000_2ax_cfg_qnj_hr_f0;
3281 else
3282 trans->cfg = &iwl22000_2ac_cfg_hr;
3283 }
3284#endif
3285
3286 iwl_pcie_set_interrupt_capa(pdev, trans);
3287 trans->hw_id = (pdev->device << 16) + pdev->subsystem_device;
3288 snprintf(trans->hw_id_str, sizeof(trans->hw_id_str),
3289 "PCI ID: 0x%04X:0x%04X", pdev->device, pdev->subsystem_device);
3290
3291 /* Initialize the wait queue for commands */
3292 init_waitqueue_head(&trans_pcie->wait_command_queue);
3293
3294 init_waitqueue_head(&trans_pcie->d0i3_waitq);
3295
3296 if (trans_pcie->msix_enabled) {
3297 ret = iwl_pcie_init_msix_handler(pdev, trans_pcie);
3298 if (ret)
3299 goto out_no_pci;
3300 } else {
3301 ret = iwl_pcie_alloc_ict(trans);
3302 if (ret)
3303 goto out_no_pci;
3304
3305 ret = devm_request_threaded_irq(&pdev->dev, pdev->irq,
3306 iwl_pcie_isr,
3307 iwl_pcie_irq_handler,
3308 IRQF_SHARED, DRV_NAME, trans);
3309 if (ret) {
3310 IWL_ERR(trans, "Error allocating IRQ %d\n", pdev->irq);
3311 goto out_free_ict;
3312 }
3313 trans_pcie->inta_mask = CSR_INI_SET_MASK;
3314 }
3315
3316 trans_pcie->rba.alloc_wq = alloc_workqueue("rb_allocator",
3317 WQ_HIGHPRI | WQ_UNBOUND, 1);
3318 INIT_WORK(&trans_pcie->rba.rx_alloc, iwl_pcie_rx_allocator_work);
3319
3320#ifdef CONFIG_IWLWIFI_PCIE_RTPM
3321 trans->runtime_pm_mode = IWL_PLAT_PM_MODE_D0I3;
3322#else
3323 trans->runtime_pm_mode = IWL_PLAT_PM_MODE_DISABLED;
3324#endif /* CONFIG_IWLWIFI_PCIE_RTPM */
3325
3326 return trans;
3327
3328out_free_ict:
3329 iwl_pcie_free_ict(trans);
3330out_no_pci:
3331 free_percpu(trans_pcie->tso_hdr_page);
3332 iwl_trans_free(trans);
3333 return ERR_PTR(ret);
3334}