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
iwl_trans_pcie_dump_regs(struct iwl_trans * trans)36 void 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
122 err_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);
125 out:
126 trans_pcie->pcie_dbg_dumped_once = 1;
127 kfree(buf);
128 }
129
iwl_trans_pcie_sw_reset(struct iwl_trans * trans,bool retake_ownership)130 static 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
iwl_pcie_free_fw_monitor(struct iwl_trans * trans)150 static 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
iwl_pcie_alloc_fw_monitor_block(struct iwl_trans * trans,u8 max_power)165 static 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
iwl_pcie_alloc_fw_monitor(struct iwl_trans * trans,u8 max_power)207 void 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
iwl_trans_pcie_read_shr(struct iwl_trans * trans,u32 reg)224 static 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
iwl_trans_pcie_write_shr(struct iwl_trans * trans,u32 reg,u32 val)231 static 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
iwl_pcie_set_pwr(struct iwl_trans * trans,bool vaux)238 static 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
iwl_pcie_apm_config(struct iwl_trans * trans)256 void 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 */
iwl_pcie_apm_init(struct iwl_trans * trans)284 static 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 */
iwl_pcie_apm_lp_xtal_enable(struct iwl_trans * trans)382 static 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
iwl_pcie_apm_stop_master(struct iwl_trans * trans)466 void 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
iwl_pcie_apm_stop(struct iwl_trans * trans,bool op_mode_leave)495 static 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
iwl_pcie_nic_init(struct iwl_trans * trans)540 static 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 */
iwl_pcie_set_hw_ready(struct iwl_trans * trans)580 static 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 */
iwl_pcie_prepare_card_hw(struct iwl_trans * trans)601 int 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 */
iwl_pcie_load_firmware_chunk_fh(struct iwl_trans * trans,u32 dst_addr,dma_addr_t phy_addr,u32 byte_cnt)659 static 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
iwl_pcie_load_firmware_chunk(struct iwl_trans * trans,u32 dst_addr,dma_addr_t phy_addr,u32 byte_cnt)687 static 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
iwl_pcie_load_section(struct iwl_trans * trans,u8 section_num,const struct fw_desc * section)714 static 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
iwl_pcie_load_cpu_sections_8000(struct iwl_trans * trans,const struct fw_img * image,int cpu,int * first_ucode_section)771 static 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
iwl_pcie_load_cpu_sections(struct iwl_trans * trans,const struct fw_img * image,int cpu,int * first_ucode_section)841 static 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
iwl_pcie_apply_destination_ini(struct iwl_trans * trans)882 static 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
iwl_pcie_apply_destination(struct iwl_trans * trans)919 void 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
976 monitor:
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
iwl_pcie_load_given_ucode(struct iwl_trans * trans,const struct fw_img * image)991 static 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
iwl_pcie_load_given_ucode_8000(struct iwl_trans * trans,const struct fw_img * image)1029 static 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
iwl_pcie_check_hw_rf_kill(struct iwl_trans * trans)1066 bool 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
1090 struct 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
1106 static 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
1124 static 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
1128 static 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
iwl_pcie_map_list(struct iwl_trans * trans,const struct iwl_causes_list * causes,int arr_size,int val)1132 static 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
iwl_pcie_map_non_rx_causes(struct iwl_trans * trans)1145 static 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
iwl_pcie_map_rx_causes(struct iwl_trans * trans)1164 static 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
iwl_pcie_conf_msix_hw(struct iwl_trans_pcie * trans_pcie)1194 void 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
iwl_pcie_init_msix(struct iwl_trans_pcie * trans_pcie)1225 static 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
_iwl_trans_pcie_stop_device(struct iwl_trans * trans,bool from_irq)1240 static 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
iwl_pcie_synchronize_irqs(struct iwl_trans * trans)1325 void 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
iwl_trans_pcie_start_fw(struct iwl_trans * trans,const struct fw_img * fw,bool run_in_rfkill)1339 static 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
1421 out:
1422 mutex_unlock(&trans_pcie->mutex);
1423 return ret;
1424 }
1425
iwl_trans_pcie_fw_alive(struct iwl_trans * trans,u32 scd_addr)1426 static 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
iwl_trans_pcie_handle_stop_rfkill(struct iwl_trans * trans,bool was_in_rfkill)1432 void 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
iwl_trans_pcie_stop_device(struct iwl_trans * trans)1461 static 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
iwl_trans_pcie_rf_kill(struct iwl_trans * trans,bool state,bool from_irq)1478 void 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 !WARN_ON(trans->trans_cfg->gen2))
1489 _iwl_trans_pcie_stop_device(trans, from_irq);
1490 }
1491
iwl_pcie_d3_complete_suspend(struct iwl_trans * trans,bool test,bool reset)1492 void iwl_pcie_d3_complete_suspend(struct iwl_trans *trans,
1493 bool test, bool reset)
1494 {
1495 iwl_disable_interrupts(trans);
1496
1497 /*
1498 * in testing mode, the host stays awake and the
1499 * hardware won't be reset (not even partially)
1500 */
1501 if (test)
1502 return;
1503
1504 iwl_pcie_disable_ict(trans);
1505
1506 iwl_pcie_synchronize_irqs(trans);
1507
1508 iwl_clear_bit(trans, CSR_GP_CNTRL,
1509 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
1510 iwl_clear_bit(trans, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1511
1512 if (reset) {
1513 /*
1514 * reset TX queues -- some of their registers reset during S3
1515 * so if we don't reset everything here the D3 image would try
1516 * to execute some invalid memory upon resume
1517 */
1518 iwl_trans_pcie_tx_reset(trans);
1519 }
1520
1521 iwl_pcie_set_pwr(trans, true);
1522 }
1523
iwl_pcie_d3_handshake(struct iwl_trans * trans,bool suspend)1524 static int iwl_pcie_d3_handshake(struct iwl_trans *trans, bool suspend)
1525 {
1526 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1527 int ret;
1528
1529 if (trans->trans_cfg->device_family == IWL_DEVICE_FAMILY_AX210)
1530 iwl_write_umac_prph(trans, UREG_DOORBELL_TO_ISR6,
1531 suspend ? UREG_DOORBELL_TO_ISR6_SUSPEND :
1532 UREG_DOORBELL_TO_ISR6_RESUME);
1533 else if (trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_BZ)
1534 iwl_write32(trans, CSR_IPC_SLEEP_CONTROL,
1535 suspend ? CSR_IPC_SLEEP_CONTROL_SUSPEND :
1536 CSR_IPC_SLEEP_CONTROL_RESUME);
1537 else
1538 return 0;
1539
1540 ret = wait_event_timeout(trans_pcie->sx_waitq,
1541 trans_pcie->sx_complete, 2 * HZ);
1542
1543 /* Invalidate it toward next suspend or resume */
1544 trans_pcie->sx_complete = false;
1545
1546 if (!ret) {
1547 IWL_ERR(trans, "Timeout %s D3\n",
1548 suspend ? "entering" : "exiting");
1549 return -ETIMEDOUT;
1550 }
1551
1552 return 0;
1553 }
1554
iwl_trans_pcie_d3_suspend(struct iwl_trans * trans,bool test,bool reset)1555 static int iwl_trans_pcie_d3_suspend(struct iwl_trans *trans, bool test,
1556 bool reset)
1557 {
1558 int ret;
1559
1560 if (!reset)
1561 /* Enable persistence mode to avoid reset */
1562 iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG,
1563 CSR_HW_IF_CONFIG_REG_PERSIST_MODE);
1564
1565 ret = iwl_pcie_d3_handshake(trans, true);
1566 if (ret)
1567 return ret;
1568
1569 iwl_pcie_d3_complete_suspend(trans, test, reset);
1570
1571 return 0;
1572 }
1573
iwl_trans_pcie_d3_resume(struct iwl_trans * trans,enum iwl_d3_status * status,bool test,bool reset)1574 static int iwl_trans_pcie_d3_resume(struct iwl_trans *trans,
1575 enum iwl_d3_status *status,
1576 bool test, bool reset)
1577 {
1578 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1579 u32 val;
1580 int ret;
1581
1582 if (test) {
1583 iwl_enable_interrupts(trans);
1584 *status = IWL_D3_STATUS_ALIVE;
1585 ret = 0;
1586 goto out;
1587 }
1588
1589 iwl_set_bit(trans, CSR_GP_CNTRL,
1590 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
1591
1592 ret = iwl_finish_nic_init(trans);
1593 if (ret)
1594 return ret;
1595
1596 /*
1597 * Reconfigure IVAR table in case of MSIX or reset ict table in
1598 * MSI mode since HW reset erased it.
1599 * Also enables interrupts - none will happen as
1600 * the device doesn't know we're waking it up, only when
1601 * the opmode actually tells it after this call.
1602 */
1603 iwl_pcie_conf_msix_hw(trans_pcie);
1604 if (!trans_pcie->msix_enabled)
1605 iwl_pcie_reset_ict(trans);
1606 iwl_enable_interrupts(trans);
1607
1608 iwl_pcie_set_pwr(trans, false);
1609
1610 if (!reset) {
1611 iwl_clear_bit(trans, CSR_GP_CNTRL,
1612 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
1613 } else {
1614 iwl_trans_pcie_tx_reset(trans);
1615
1616 ret = iwl_pcie_rx_init(trans);
1617 if (ret) {
1618 IWL_ERR(trans,
1619 "Failed to resume the device (RX reset)\n");
1620 return ret;
1621 }
1622 }
1623
1624 IWL_DEBUG_POWER(trans, "WFPM value upon resume = 0x%08X\n",
1625 iwl_read_umac_prph(trans, WFPM_GP2));
1626
1627 val = iwl_read32(trans, CSR_RESET);
1628 if (val & CSR_RESET_REG_FLAG_NEVO_RESET)
1629 *status = IWL_D3_STATUS_RESET;
1630 else
1631 *status = IWL_D3_STATUS_ALIVE;
1632
1633 out:
1634 if (*status == IWL_D3_STATUS_ALIVE)
1635 ret = iwl_pcie_d3_handshake(trans, false);
1636
1637 return ret;
1638 }
1639
1640 static void
iwl_pcie_set_interrupt_capa(struct pci_dev * pdev,struct iwl_trans * trans,const struct iwl_cfg_trans_params * cfg_trans)1641 iwl_pcie_set_interrupt_capa(struct pci_dev *pdev,
1642 struct iwl_trans *trans,
1643 const struct iwl_cfg_trans_params *cfg_trans)
1644 {
1645 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1646 int max_irqs, num_irqs, i, ret;
1647 u16 pci_cmd;
1648 u32 max_rx_queues = IWL_MAX_RX_HW_QUEUES;
1649
1650 if (!cfg_trans->mq_rx_supported)
1651 goto enable_msi;
1652
1653 if (cfg_trans->device_family <= IWL_DEVICE_FAMILY_9000)
1654 max_rx_queues = IWL_9000_MAX_RX_HW_QUEUES;
1655
1656 max_irqs = min_t(u32, num_online_cpus() + 2, max_rx_queues);
1657 for (i = 0; i < max_irqs; i++)
1658 trans_pcie->msix_entries[i].entry = i;
1659
1660 num_irqs = pci_enable_msix_range(pdev, trans_pcie->msix_entries,
1661 MSIX_MIN_INTERRUPT_VECTORS,
1662 max_irqs);
1663 if (num_irqs < 0) {
1664 IWL_DEBUG_INFO(trans,
1665 "Failed to enable msi-x mode (ret %d). Moving to msi mode.\n",
1666 num_irqs);
1667 goto enable_msi;
1668 }
1669 trans_pcie->def_irq = (num_irqs == max_irqs) ? num_irqs - 1 : 0;
1670
1671 IWL_DEBUG_INFO(trans,
1672 "MSI-X enabled. %d interrupt vectors were allocated\n",
1673 num_irqs);
1674
1675 /*
1676 * In case the OS provides fewer interrupts than requested, different
1677 * causes will share the same interrupt vector as follows:
1678 * One interrupt less: non rx causes shared with FBQ.
1679 * Two interrupts less: non rx causes shared with FBQ and RSS.
1680 * More than two interrupts: we will use fewer RSS queues.
1681 */
1682 if (num_irqs <= max_irqs - 2) {
1683 trans_pcie->trans->num_rx_queues = num_irqs + 1;
1684 trans_pcie->shared_vec_mask = IWL_SHARED_IRQ_NON_RX |
1685 IWL_SHARED_IRQ_FIRST_RSS;
1686 } else if (num_irqs == max_irqs - 1) {
1687 trans_pcie->trans->num_rx_queues = num_irqs;
1688 trans_pcie->shared_vec_mask = IWL_SHARED_IRQ_NON_RX;
1689 } else {
1690 trans_pcie->trans->num_rx_queues = num_irqs - 1;
1691 }
1692
1693 IWL_DEBUG_INFO(trans,
1694 "MSI-X enabled with rx queues %d, vec mask 0x%x\n",
1695 trans_pcie->trans->num_rx_queues, trans_pcie->shared_vec_mask);
1696
1697 WARN_ON(trans_pcie->trans->num_rx_queues > IWL_MAX_RX_HW_QUEUES);
1698
1699 trans_pcie->alloc_vecs = num_irqs;
1700 trans_pcie->msix_enabled = true;
1701 return;
1702
1703 enable_msi:
1704 ret = pci_enable_msi(pdev);
1705 if (ret) {
1706 dev_err(&pdev->dev, "pci_enable_msi failed - %d\n", ret);
1707 /* enable rfkill interrupt: hw bug w/a */
1708 pci_read_config_word(pdev, PCI_COMMAND, &pci_cmd);
1709 if (pci_cmd & PCI_COMMAND_INTX_DISABLE) {
1710 pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
1711 pci_write_config_word(pdev, PCI_COMMAND, pci_cmd);
1712 }
1713 }
1714 }
1715
iwl_pcie_irq_set_affinity(struct iwl_trans * trans)1716 static void iwl_pcie_irq_set_affinity(struct iwl_trans *trans)
1717 {
1718 #if defined(CONFIG_SMP)
1719 int iter_rx_q, i, ret, cpu, offset;
1720 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1721
1722 i = trans_pcie->shared_vec_mask & IWL_SHARED_IRQ_FIRST_RSS ? 0 : 1;
1723 iter_rx_q = trans_pcie->trans->num_rx_queues - 1 + i;
1724 offset = 1 + i;
1725 for (; i < iter_rx_q ; i++) {
1726 /*
1727 * Get the cpu prior to the place to search
1728 * (i.e. return will be > i - 1).
1729 */
1730 cpu = cpumask_next(i - offset, cpu_online_mask);
1731 cpumask_set_cpu(cpu, &trans_pcie->affinity_mask[i]);
1732 ret = irq_set_affinity_hint(trans_pcie->msix_entries[i].vector,
1733 &trans_pcie->affinity_mask[i]);
1734 if (ret)
1735 IWL_ERR(trans_pcie->trans,
1736 "Failed to set affinity mask for IRQ %d\n",
1737 trans_pcie->msix_entries[i].vector);
1738 }
1739 #endif
1740 }
1741
iwl_pcie_init_msix_handler(struct pci_dev * pdev,struct iwl_trans_pcie * trans_pcie)1742 static int iwl_pcie_init_msix_handler(struct pci_dev *pdev,
1743 struct iwl_trans_pcie *trans_pcie)
1744 {
1745 int i;
1746
1747 for (i = 0; i < trans_pcie->alloc_vecs; i++) {
1748 int ret;
1749 struct msix_entry *msix_entry;
1750 const char *qname = queue_name(&pdev->dev, trans_pcie, i);
1751
1752 if (!qname)
1753 return -ENOMEM;
1754
1755 msix_entry = &trans_pcie->msix_entries[i];
1756 ret = devm_request_threaded_irq(&pdev->dev,
1757 msix_entry->vector,
1758 iwl_pcie_msix_isr,
1759 (i == trans_pcie->def_irq) ?
1760 iwl_pcie_irq_msix_handler :
1761 iwl_pcie_irq_rx_msix_handler,
1762 IRQF_SHARED,
1763 qname,
1764 msix_entry);
1765 if (ret) {
1766 IWL_ERR(trans_pcie->trans,
1767 "Error allocating IRQ %d\n", i);
1768
1769 return ret;
1770 }
1771 }
1772 iwl_pcie_irq_set_affinity(trans_pcie->trans);
1773
1774 return 0;
1775 }
1776
iwl_trans_pcie_clear_persistence_bit(struct iwl_trans * trans)1777 static int iwl_trans_pcie_clear_persistence_bit(struct iwl_trans *trans)
1778 {
1779 u32 hpm, wprot;
1780
1781 switch (trans->trans_cfg->device_family) {
1782 case IWL_DEVICE_FAMILY_9000:
1783 wprot = PREG_PRPH_WPROT_9000;
1784 break;
1785 case IWL_DEVICE_FAMILY_22000:
1786 wprot = PREG_PRPH_WPROT_22000;
1787 break;
1788 default:
1789 return 0;
1790 }
1791
1792 hpm = iwl_read_umac_prph_no_grab(trans, HPM_DEBUG);
1793 if (!iwl_trans_is_hw_error_value(hpm) && (hpm & PERSISTENCE_BIT)) {
1794 u32 wprot_val = iwl_read_umac_prph_no_grab(trans, wprot);
1795
1796 if (wprot_val & PREG_WFPM_ACCESS) {
1797 IWL_ERR(trans,
1798 "Error, can not clear persistence bit\n");
1799 return -EPERM;
1800 }
1801 iwl_write_umac_prph_no_grab(trans, HPM_DEBUG,
1802 hpm & ~PERSISTENCE_BIT);
1803 }
1804
1805 return 0;
1806 }
1807
iwl_pcie_gen2_force_power_gating(struct iwl_trans * trans)1808 static int iwl_pcie_gen2_force_power_gating(struct iwl_trans *trans)
1809 {
1810 int ret;
1811
1812 ret = iwl_finish_nic_init(trans);
1813 if (ret < 0)
1814 return ret;
1815
1816 iwl_set_bits_prph(trans, HPM_HIPM_GEN_CFG,
1817 HPM_HIPM_GEN_CFG_CR_FORCE_ACTIVE);
1818 udelay(20);
1819 iwl_set_bits_prph(trans, HPM_HIPM_GEN_CFG,
1820 HPM_HIPM_GEN_CFG_CR_PG_EN |
1821 HPM_HIPM_GEN_CFG_CR_SLP_EN);
1822 udelay(20);
1823 iwl_clear_bits_prph(trans, HPM_HIPM_GEN_CFG,
1824 HPM_HIPM_GEN_CFG_CR_FORCE_ACTIVE);
1825
1826 return iwl_trans_pcie_sw_reset(trans, true);
1827 }
1828
_iwl_trans_pcie_start_hw(struct iwl_trans * trans)1829 static int _iwl_trans_pcie_start_hw(struct iwl_trans *trans)
1830 {
1831 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1832 int err;
1833
1834 lockdep_assert_held(&trans_pcie->mutex);
1835
1836 err = iwl_pcie_prepare_card_hw(trans);
1837 if (err) {
1838 IWL_ERR(trans, "Error while preparing HW: %d\n", err);
1839 return err;
1840 }
1841
1842 err = iwl_trans_pcie_clear_persistence_bit(trans);
1843 if (err)
1844 return err;
1845
1846 err = iwl_trans_pcie_sw_reset(trans, true);
1847 if (err)
1848 return err;
1849
1850 if (trans->trans_cfg->device_family == IWL_DEVICE_FAMILY_22000 &&
1851 trans->trans_cfg->integrated) {
1852 err = iwl_pcie_gen2_force_power_gating(trans);
1853 if (err)
1854 return err;
1855 }
1856
1857 err = iwl_pcie_apm_init(trans);
1858 if (err)
1859 return err;
1860
1861 iwl_pcie_init_msix(trans_pcie);
1862
1863 /* From now on, the op_mode will be kept updated about RF kill state */
1864 iwl_enable_rfkill_int(trans);
1865
1866 trans_pcie->opmode_down = false;
1867
1868 /* Set is_down to false here so that...*/
1869 trans_pcie->is_down = false;
1870
1871 /* ...rfkill can call stop_device and set it false if needed */
1872 iwl_pcie_check_hw_rf_kill(trans);
1873
1874 return 0;
1875 }
1876
iwl_trans_pcie_start_hw(struct iwl_trans * trans)1877 static int iwl_trans_pcie_start_hw(struct iwl_trans *trans)
1878 {
1879 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1880 int ret;
1881
1882 mutex_lock(&trans_pcie->mutex);
1883 ret = _iwl_trans_pcie_start_hw(trans);
1884 mutex_unlock(&trans_pcie->mutex);
1885
1886 return ret;
1887 }
1888
iwl_trans_pcie_op_mode_leave(struct iwl_trans * trans)1889 static void iwl_trans_pcie_op_mode_leave(struct iwl_trans *trans)
1890 {
1891 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1892
1893 mutex_lock(&trans_pcie->mutex);
1894
1895 /* disable interrupts - don't enable HW RF kill interrupt */
1896 iwl_disable_interrupts(trans);
1897
1898 iwl_pcie_apm_stop(trans, true);
1899
1900 iwl_disable_interrupts(trans);
1901
1902 iwl_pcie_disable_ict(trans);
1903
1904 mutex_unlock(&trans_pcie->mutex);
1905
1906 iwl_pcie_synchronize_irqs(trans);
1907 }
1908
iwl_trans_pcie_write8(struct iwl_trans * trans,u32 ofs,u8 val)1909 static void iwl_trans_pcie_write8(struct iwl_trans *trans, u32 ofs, u8 val)
1910 {
1911 writeb(val, IWL_TRANS_GET_PCIE_TRANS(trans)->hw_base + ofs);
1912 }
1913
iwl_trans_pcie_write32(struct iwl_trans * trans,u32 ofs,u32 val)1914 static void iwl_trans_pcie_write32(struct iwl_trans *trans, u32 ofs, u32 val)
1915 {
1916 writel(val, IWL_TRANS_GET_PCIE_TRANS(trans)->hw_base + ofs);
1917 }
1918
iwl_trans_pcie_read32(struct iwl_trans * trans,u32 ofs)1919 static u32 iwl_trans_pcie_read32(struct iwl_trans *trans, u32 ofs)
1920 {
1921 return readl(IWL_TRANS_GET_PCIE_TRANS(trans)->hw_base + ofs);
1922 }
1923
iwl_trans_pcie_prph_msk(struct iwl_trans * trans)1924 static u32 iwl_trans_pcie_prph_msk(struct iwl_trans *trans)
1925 {
1926 if (trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_AX210)
1927 return 0x00FFFFFF;
1928 else
1929 return 0x000FFFFF;
1930 }
1931
iwl_trans_pcie_read_prph(struct iwl_trans * trans,u32 reg)1932 static u32 iwl_trans_pcie_read_prph(struct iwl_trans *trans, u32 reg)
1933 {
1934 u32 mask = iwl_trans_pcie_prph_msk(trans);
1935
1936 iwl_trans_pcie_write32(trans, HBUS_TARG_PRPH_RADDR,
1937 ((reg & mask) | (3 << 24)));
1938 return iwl_trans_pcie_read32(trans, HBUS_TARG_PRPH_RDAT);
1939 }
1940
iwl_trans_pcie_write_prph(struct iwl_trans * trans,u32 addr,u32 val)1941 static void iwl_trans_pcie_write_prph(struct iwl_trans *trans, u32 addr,
1942 u32 val)
1943 {
1944 u32 mask = iwl_trans_pcie_prph_msk(trans);
1945
1946 iwl_trans_pcie_write32(trans, HBUS_TARG_PRPH_WADDR,
1947 ((addr & mask) | (3 << 24)));
1948 iwl_trans_pcie_write32(trans, HBUS_TARG_PRPH_WDAT, val);
1949 }
1950
iwl_trans_pcie_configure(struct iwl_trans * trans,const struct iwl_trans_config * trans_cfg)1951 static void iwl_trans_pcie_configure(struct iwl_trans *trans,
1952 const struct iwl_trans_config *trans_cfg)
1953 {
1954 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1955
1956 /* free all first - we might be reconfigured for a different size */
1957 iwl_pcie_free_rbs_pool(trans);
1958
1959 trans->txqs.cmd.q_id = trans_cfg->cmd_queue;
1960 trans->txqs.cmd.fifo = trans_cfg->cmd_fifo;
1961 trans->txqs.cmd.wdg_timeout = trans_cfg->cmd_q_wdg_timeout;
1962 trans->txqs.page_offs = trans_cfg->cb_data_offs;
1963 trans->txqs.dev_cmd_offs = trans_cfg->cb_data_offs + sizeof(void *);
1964 trans->txqs.queue_alloc_cmd_ver = trans_cfg->queue_alloc_cmd_ver;
1965
1966 if (WARN_ON(trans_cfg->n_no_reclaim_cmds > MAX_NO_RECLAIM_CMDS))
1967 trans_pcie->n_no_reclaim_cmds = 0;
1968 else
1969 trans_pcie->n_no_reclaim_cmds = trans_cfg->n_no_reclaim_cmds;
1970 if (trans_pcie->n_no_reclaim_cmds)
1971 memcpy(trans_pcie->no_reclaim_cmds, trans_cfg->no_reclaim_cmds,
1972 trans_pcie->n_no_reclaim_cmds * sizeof(u8));
1973
1974 trans_pcie->rx_buf_size = trans_cfg->rx_buf_size;
1975 trans_pcie->rx_page_order =
1976 iwl_trans_get_rb_size_order(trans_pcie->rx_buf_size);
1977 trans_pcie->rx_buf_bytes =
1978 iwl_trans_get_rb_size(trans_pcie->rx_buf_size);
1979 trans_pcie->supported_dma_mask = DMA_BIT_MASK(12);
1980 if (trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_AX210)
1981 trans_pcie->supported_dma_mask = DMA_BIT_MASK(11);
1982
1983 trans->txqs.bc_table_dword = trans_cfg->bc_table_dword;
1984 trans_pcie->scd_set_active = trans_cfg->scd_set_active;
1985
1986 trans->command_groups = trans_cfg->command_groups;
1987 trans->command_groups_size = trans_cfg->command_groups_size;
1988
1989
1990 trans_pcie->fw_reset_handshake = trans_cfg->fw_reset_handshake;
1991 }
1992
iwl_trans_pcie_free_pnvm_dram_regions(struct iwl_dram_regions * dram_regions,struct device * dev)1993 void iwl_trans_pcie_free_pnvm_dram_regions(struct iwl_dram_regions *dram_regions,
1994 struct device *dev)
1995 {
1996 u8 i;
1997 struct iwl_dram_data *desc_dram = &dram_regions->prph_scratch_mem_desc;
1998
1999 /* free DRAM payloads */
2000 for (i = 0; i < dram_regions->n_regions; i++) {
2001 dma_free_coherent(dev, dram_regions->drams[i].size,
2002 dram_regions->drams[i].block,
2003 dram_regions->drams[i].physical);
2004 }
2005 dram_regions->n_regions = 0;
2006
2007 /* free DRAM addresses array */
2008 if (desc_dram->block) {
2009 dma_free_coherent(dev, desc_dram->size,
2010 desc_dram->block,
2011 desc_dram->physical);
2012 }
2013 memset(desc_dram, 0, sizeof(*desc_dram));
2014 }
2015
iwl_pcie_free_invalid_tx_cmd(struct iwl_trans * trans)2016 static void iwl_pcie_free_invalid_tx_cmd(struct iwl_trans *trans)
2017 {
2018 iwl_pcie_free_dma_ptr(trans, &trans->invalid_tx_cmd);
2019 }
2020
iwl_pcie_alloc_invalid_tx_cmd(struct iwl_trans * trans)2021 static int iwl_pcie_alloc_invalid_tx_cmd(struct iwl_trans *trans)
2022 {
2023 struct iwl_cmd_header_wide bad_cmd = {
2024 .cmd = INVALID_WR_PTR_CMD,
2025 .group_id = DEBUG_GROUP,
2026 .sequence = cpu_to_le16(0xffff),
2027 .length = cpu_to_le16(0),
2028 .version = 0,
2029 };
2030 int ret;
2031
2032 ret = iwl_pcie_alloc_dma_ptr(trans, &trans->invalid_tx_cmd,
2033 sizeof(bad_cmd));
2034 if (ret)
2035 return ret;
2036 memcpy(trans->invalid_tx_cmd.addr, &bad_cmd, sizeof(bad_cmd));
2037 return 0;
2038 }
2039
iwl_trans_pcie_free(struct iwl_trans * trans)2040 void iwl_trans_pcie_free(struct iwl_trans *trans)
2041 {
2042 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2043 int i;
2044
2045 iwl_pcie_synchronize_irqs(trans);
2046
2047 if (trans->trans_cfg->gen2)
2048 iwl_txq_gen2_tx_free(trans);
2049 else
2050 iwl_pcie_tx_free(trans);
2051 iwl_pcie_rx_free(trans);
2052
2053 if (trans_pcie->rba.alloc_wq) {
2054 destroy_workqueue(trans_pcie->rba.alloc_wq);
2055 trans_pcie->rba.alloc_wq = NULL;
2056 }
2057
2058 if (trans_pcie->msix_enabled) {
2059 for (i = 0; i < trans_pcie->alloc_vecs; i++) {
2060 irq_set_affinity_hint(
2061 trans_pcie->msix_entries[i].vector,
2062 NULL);
2063 }
2064
2065 trans_pcie->msix_enabled = false;
2066 } else {
2067 iwl_pcie_free_ict(trans);
2068 }
2069
2070 free_netdev(trans_pcie->napi_dev);
2071
2072 iwl_pcie_free_invalid_tx_cmd(trans);
2073
2074 iwl_pcie_free_fw_monitor(trans);
2075
2076 iwl_trans_pcie_free_pnvm_dram_regions(&trans_pcie->pnvm_data,
2077 trans->dev);
2078 iwl_trans_pcie_free_pnvm_dram_regions(&trans_pcie->reduced_tables_data,
2079 trans->dev);
2080
2081 mutex_destroy(&trans_pcie->mutex);
2082 iwl_trans_free(trans);
2083 }
2084
iwl_trans_pcie_set_pmi(struct iwl_trans * trans,bool state)2085 static void iwl_trans_pcie_set_pmi(struct iwl_trans *trans, bool state)
2086 {
2087 if (state)
2088 set_bit(STATUS_TPOWER_PMI, &trans->status);
2089 else
2090 clear_bit(STATUS_TPOWER_PMI, &trans->status);
2091 }
2092
2093 struct iwl_trans_pcie_removal {
2094 struct pci_dev *pdev;
2095 struct work_struct work;
2096 bool rescan;
2097 };
2098
iwl_trans_pcie_removal_wk(struct work_struct * wk)2099 static void iwl_trans_pcie_removal_wk(struct work_struct *wk)
2100 {
2101 struct iwl_trans_pcie_removal *removal =
2102 container_of(wk, struct iwl_trans_pcie_removal, work);
2103 struct pci_dev *pdev = removal->pdev;
2104 static char *prop[] = {"EVENT=INACCESSIBLE", NULL};
2105 struct pci_bus *bus;
2106
2107 pci_lock_rescan_remove();
2108
2109 bus = pdev->bus;
2110 /* in this case, something else already removed the device */
2111 if (!bus)
2112 goto out;
2113
2114 dev_err(&pdev->dev, "Device gone - attempting removal\n");
2115
2116 kobject_uevent_env(&pdev->dev.kobj, KOBJ_CHANGE, prop);
2117
2118 pci_stop_and_remove_bus_device(pdev);
2119 pci_dev_put(pdev);
2120
2121 if (removal->rescan) {
2122 if (bus->parent)
2123 bus = bus->parent;
2124 pci_rescan_bus(bus);
2125 }
2126
2127 out:
2128 pci_unlock_rescan_remove();
2129
2130 kfree(removal);
2131 module_put(THIS_MODULE);
2132 }
2133
iwl_trans_pcie_remove(struct iwl_trans * trans,bool rescan)2134 void iwl_trans_pcie_remove(struct iwl_trans *trans, bool rescan)
2135 {
2136 struct iwl_trans_pcie_removal *removal;
2137
2138 if (test_bit(STATUS_TRANS_DEAD, &trans->status))
2139 return;
2140
2141 IWL_ERR(trans, "Device gone - scheduling removal!\n");
2142 iwl_pcie_dump_csr(trans);
2143
2144 /*
2145 * get a module reference to avoid doing this
2146 * while unloading anyway and to avoid
2147 * scheduling a work with code that's being
2148 * removed.
2149 */
2150 if (!try_module_get(THIS_MODULE)) {
2151 IWL_ERR(trans,
2152 "Module is being unloaded - abort\n");
2153 return;
2154 }
2155
2156 removal = kzalloc(sizeof(*removal), GFP_ATOMIC);
2157 if (!removal) {
2158 module_put(THIS_MODULE);
2159 return;
2160 }
2161 /*
2162 * we don't need to clear this flag, because
2163 * the trans will be freed and reallocated.
2164 */
2165 set_bit(STATUS_TRANS_DEAD, &trans->status);
2166
2167 removal->pdev = to_pci_dev(trans->dev);
2168 removal->rescan = rescan;
2169 INIT_WORK(&removal->work, iwl_trans_pcie_removal_wk);
2170 pci_dev_get(removal->pdev);
2171 schedule_work(&removal->work);
2172 }
2173 EXPORT_SYMBOL(iwl_trans_pcie_remove);
2174
2175 /*
2176 * This version doesn't disable BHs but rather assumes they're
2177 * already disabled.
2178 */
__iwl_trans_pcie_grab_nic_access(struct iwl_trans * trans)2179 bool __iwl_trans_pcie_grab_nic_access(struct iwl_trans *trans)
2180 {
2181 int ret;
2182 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2183 u32 write = CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ;
2184 u32 mask = CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY |
2185 CSR_GP_CNTRL_REG_FLAG_GOING_TO_SLEEP;
2186 u32 poll = CSR_GP_CNTRL_REG_VAL_MAC_ACCESS_EN;
2187
2188 if (test_bit(STATUS_TRANS_DEAD, &trans->status))
2189 return false;
2190
2191 spin_lock(&trans_pcie->reg_lock);
2192
2193 if (trans_pcie->cmd_hold_nic_awake)
2194 goto out;
2195
2196 if (trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_BZ) {
2197 write = CSR_GP_CNTRL_REG_FLAG_BZ_MAC_ACCESS_REQ;
2198 mask = CSR_GP_CNTRL_REG_FLAG_MAC_STATUS;
2199 poll = CSR_GP_CNTRL_REG_FLAG_MAC_STATUS;
2200 }
2201
2202 /* this bit wakes up the NIC */
2203 __iwl_trans_pcie_set_bit(trans, CSR_GP_CNTRL, write);
2204 if (trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_8000)
2205 udelay(2);
2206
2207 /*
2208 * These bits say the device is running, and should keep running for
2209 * at least a short while (at least as long as MAC_ACCESS_REQ stays 1),
2210 * but they do not indicate that embedded SRAM is restored yet;
2211 * HW with volatile SRAM must save/restore contents to/from
2212 * host DRAM when sleeping/waking for power-saving.
2213 * Each direction takes approximately 1/4 millisecond; with this
2214 * overhead, it's a good idea to grab and hold MAC_ACCESS_REQUEST if a
2215 * series of register accesses are expected (e.g. reading Event Log),
2216 * to keep device from sleeping.
2217 *
2218 * CSR_UCODE_DRV_GP1 register bit MAC_SLEEP == 0 indicates that
2219 * SRAM is okay/restored. We don't check that here because this call
2220 * is just for hardware register access; but GP1 MAC_SLEEP
2221 * check is a good idea before accessing the SRAM of HW with
2222 * volatile SRAM (e.g. reading Event Log).
2223 *
2224 * 5000 series and later (including 1000 series) have non-volatile SRAM,
2225 * and do not save/restore SRAM when power cycling.
2226 */
2227 ret = iwl_poll_bit(trans, CSR_GP_CNTRL, poll, mask, 15000);
2228 if (unlikely(ret < 0)) {
2229 u32 cntrl = iwl_read32(trans, CSR_GP_CNTRL);
2230
2231 WARN_ONCE(1,
2232 "Timeout waiting for hardware access (CSR_GP_CNTRL 0x%08x)\n",
2233 cntrl);
2234
2235 iwl_trans_pcie_dump_regs(trans);
2236
2237 if (iwlwifi_mod_params.remove_when_gone && cntrl == ~0U)
2238 iwl_trans_pcie_remove(trans, false);
2239 else
2240 iwl_write32(trans, CSR_RESET,
2241 CSR_RESET_REG_FLAG_FORCE_NMI);
2242
2243 spin_unlock(&trans_pcie->reg_lock);
2244 return false;
2245 }
2246
2247 out:
2248 /*
2249 * Fool sparse by faking we release the lock - sparse will
2250 * track nic_access anyway.
2251 */
2252 __release(&trans_pcie->reg_lock);
2253 return true;
2254 }
2255
iwl_trans_pcie_grab_nic_access(struct iwl_trans * trans)2256 static bool iwl_trans_pcie_grab_nic_access(struct iwl_trans *trans)
2257 {
2258 bool ret;
2259
2260 local_bh_disable();
2261 ret = __iwl_trans_pcie_grab_nic_access(trans);
2262 if (ret) {
2263 /* keep BHs disabled until iwl_trans_pcie_release_nic_access */
2264 return ret;
2265 }
2266 local_bh_enable();
2267 return false;
2268 }
2269
iwl_trans_pcie_release_nic_access(struct iwl_trans * trans)2270 static void iwl_trans_pcie_release_nic_access(struct iwl_trans *trans)
2271 {
2272 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2273
2274 lockdep_assert_held(&trans_pcie->reg_lock);
2275
2276 /*
2277 * Fool sparse by faking we acquiring the lock - sparse will
2278 * track nic_access anyway.
2279 */
2280 __acquire(&trans_pcie->reg_lock);
2281
2282 if (trans_pcie->cmd_hold_nic_awake)
2283 goto out;
2284 if (trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_BZ)
2285 __iwl_trans_pcie_clear_bit(trans, CSR_GP_CNTRL,
2286 CSR_GP_CNTRL_REG_FLAG_BZ_MAC_ACCESS_REQ);
2287 else
2288 __iwl_trans_pcie_clear_bit(trans, CSR_GP_CNTRL,
2289 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2290 /*
2291 * Above we read the CSR_GP_CNTRL register, which will flush
2292 * any previous writes, but we need the write that clears the
2293 * MAC_ACCESS_REQ bit to be performed before any other writes
2294 * scheduled on different CPUs (after we drop reg_lock).
2295 */
2296 out:
2297 spin_unlock_bh(&trans_pcie->reg_lock);
2298 }
2299
iwl_trans_pcie_read_mem(struct iwl_trans * trans,u32 addr,void * buf,int dwords)2300 static int iwl_trans_pcie_read_mem(struct iwl_trans *trans, u32 addr,
2301 void *buf, int dwords)
2302 {
2303 #define IWL_MAX_HW_ERRS 5
2304 unsigned int num_consec_hw_errors = 0;
2305 int offs = 0;
2306 u32 *vals = buf;
2307
2308 while (offs < dwords) {
2309 /* limit the time we spin here under lock to 1/2s */
2310 unsigned long end = jiffies + HZ / 2;
2311 bool resched = false;
2312
2313 if (iwl_trans_grab_nic_access(trans)) {
2314 iwl_write32(trans, HBUS_TARG_MEM_RADDR,
2315 addr + 4 * offs);
2316
2317 while (offs < dwords) {
2318 vals[offs] = iwl_read32(trans,
2319 HBUS_TARG_MEM_RDAT);
2320
2321 if (iwl_trans_is_hw_error_value(vals[offs]))
2322 num_consec_hw_errors++;
2323 else
2324 num_consec_hw_errors = 0;
2325
2326 if (num_consec_hw_errors >= IWL_MAX_HW_ERRS) {
2327 iwl_trans_release_nic_access(trans);
2328 return -EIO;
2329 }
2330
2331 offs++;
2332
2333 if (time_after(jiffies, end)) {
2334 resched = true;
2335 break;
2336 }
2337 }
2338 iwl_trans_release_nic_access(trans);
2339
2340 if (resched)
2341 cond_resched();
2342 } else {
2343 return -EBUSY;
2344 }
2345 }
2346
2347 return 0;
2348 }
2349
iwl_trans_pcie_write_mem(struct iwl_trans * trans,u32 addr,const void * buf,int dwords)2350 static int iwl_trans_pcie_write_mem(struct iwl_trans *trans, u32 addr,
2351 const void *buf, int dwords)
2352 {
2353 int offs, ret = 0;
2354 const u32 *vals = buf;
2355
2356 if (iwl_trans_grab_nic_access(trans)) {
2357 iwl_write32(trans, HBUS_TARG_MEM_WADDR, addr);
2358 for (offs = 0; offs < dwords; offs++)
2359 iwl_write32(trans, HBUS_TARG_MEM_WDAT,
2360 vals ? vals[offs] : 0);
2361 iwl_trans_release_nic_access(trans);
2362 } else {
2363 ret = -EBUSY;
2364 }
2365 return ret;
2366 }
2367
iwl_trans_pcie_read_config32(struct iwl_trans * trans,u32 ofs,u32 * val)2368 static int iwl_trans_pcie_read_config32(struct iwl_trans *trans, u32 ofs,
2369 u32 *val)
2370 {
2371 return pci_read_config_dword(IWL_TRANS_GET_PCIE_TRANS(trans)->pci_dev,
2372 ofs, val);
2373 }
2374
2375 #define IWL_FLUSH_WAIT_MS 2000
2376
iwl_trans_pcie_rxq_dma_data(struct iwl_trans * trans,int queue,struct iwl_trans_rxq_dma_data * data)2377 static int iwl_trans_pcie_rxq_dma_data(struct iwl_trans *trans, int queue,
2378 struct iwl_trans_rxq_dma_data *data)
2379 {
2380 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2381
2382 if (queue >= trans->num_rx_queues || !trans_pcie->rxq)
2383 return -EINVAL;
2384
2385 data->fr_bd_cb = trans_pcie->rxq[queue].bd_dma;
2386 data->urbd_stts_wrptr = trans_pcie->rxq[queue].rb_stts_dma;
2387 data->ur_bd_cb = trans_pcie->rxq[queue].used_bd_dma;
2388 data->fr_bd_wid = 0;
2389
2390 return 0;
2391 }
2392
iwl_trans_pcie_wait_txq_empty(struct iwl_trans * trans,int txq_idx)2393 static int iwl_trans_pcie_wait_txq_empty(struct iwl_trans *trans, int txq_idx)
2394 {
2395 struct iwl_txq *txq;
2396 unsigned long now = jiffies;
2397 bool overflow_tx;
2398 u8 wr_ptr;
2399
2400 /* Make sure the NIC is still alive in the bus */
2401 if (test_bit(STATUS_TRANS_DEAD, &trans->status))
2402 return -ENODEV;
2403
2404 if (!test_bit(txq_idx, trans->txqs.queue_used))
2405 return -EINVAL;
2406
2407 IWL_DEBUG_TX_QUEUES(trans, "Emptying queue %d...\n", txq_idx);
2408 txq = trans->txqs.txq[txq_idx];
2409
2410 spin_lock_bh(&txq->lock);
2411 overflow_tx = txq->overflow_tx ||
2412 !skb_queue_empty(&txq->overflow_q);
2413 spin_unlock_bh(&txq->lock);
2414
2415 wr_ptr = READ_ONCE(txq->write_ptr);
2416
2417 while ((txq->read_ptr != READ_ONCE(txq->write_ptr) ||
2418 overflow_tx) &&
2419 !time_after(jiffies,
2420 now + msecs_to_jiffies(IWL_FLUSH_WAIT_MS))) {
2421 u8 write_ptr = READ_ONCE(txq->write_ptr);
2422
2423 /*
2424 * If write pointer moved during the wait, warn only
2425 * if the TX came from op mode. In case TX came from
2426 * trans layer (overflow TX) don't warn.
2427 */
2428 if (WARN_ONCE(wr_ptr != write_ptr && !overflow_tx,
2429 "WR pointer moved while flushing %d -> %d\n",
2430 wr_ptr, write_ptr))
2431 return -ETIMEDOUT;
2432 wr_ptr = write_ptr;
2433
2434 usleep_range(1000, 2000);
2435
2436 spin_lock_bh(&txq->lock);
2437 overflow_tx = txq->overflow_tx ||
2438 !skb_queue_empty(&txq->overflow_q);
2439 spin_unlock_bh(&txq->lock);
2440 }
2441
2442 if (txq->read_ptr != txq->write_ptr) {
2443 IWL_ERR(trans,
2444 "fail to flush all tx fifo queues Q %d\n", txq_idx);
2445 iwl_txq_log_scd_error(trans, txq);
2446 return -ETIMEDOUT;
2447 }
2448
2449 IWL_DEBUG_TX_QUEUES(trans, "Queue %d is now empty.\n", txq_idx);
2450
2451 return 0;
2452 }
2453
iwl_trans_pcie_wait_txqs_empty(struct iwl_trans * trans,u32 txq_bm)2454 static int iwl_trans_pcie_wait_txqs_empty(struct iwl_trans *trans, u32 txq_bm)
2455 {
2456 int cnt;
2457 int ret = 0;
2458
2459 /* waiting for all the tx frames complete might take a while */
2460 for (cnt = 0;
2461 cnt < trans->trans_cfg->base_params->num_of_queues;
2462 cnt++) {
2463
2464 if (cnt == trans->txqs.cmd.q_id)
2465 continue;
2466 if (!test_bit(cnt, trans->txqs.queue_used))
2467 continue;
2468 if (!(BIT(cnt) & txq_bm))
2469 continue;
2470
2471 ret = iwl_trans_pcie_wait_txq_empty(trans, cnt);
2472 if (ret)
2473 break;
2474 }
2475
2476 return ret;
2477 }
2478
iwl_trans_pcie_set_bits_mask(struct iwl_trans * trans,u32 reg,u32 mask,u32 value)2479 static void iwl_trans_pcie_set_bits_mask(struct iwl_trans *trans, u32 reg,
2480 u32 mask, u32 value)
2481 {
2482 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2483
2484 spin_lock_bh(&trans_pcie->reg_lock);
2485 __iwl_trans_pcie_set_bits_mask(trans, reg, mask, value);
2486 spin_unlock_bh(&trans_pcie->reg_lock);
2487 }
2488
get_csr_string(int cmd)2489 static const char *get_csr_string(int cmd)
2490 {
2491 #define IWL_CMD(x) case x: return #x
2492 switch (cmd) {
2493 IWL_CMD(CSR_HW_IF_CONFIG_REG);
2494 IWL_CMD(CSR_INT_COALESCING);
2495 IWL_CMD(CSR_INT);
2496 IWL_CMD(CSR_INT_MASK);
2497 IWL_CMD(CSR_FH_INT_STATUS);
2498 IWL_CMD(CSR_GPIO_IN);
2499 IWL_CMD(CSR_RESET);
2500 IWL_CMD(CSR_GP_CNTRL);
2501 IWL_CMD(CSR_HW_REV);
2502 IWL_CMD(CSR_EEPROM_REG);
2503 IWL_CMD(CSR_EEPROM_GP);
2504 IWL_CMD(CSR_OTP_GP_REG);
2505 IWL_CMD(CSR_GIO_REG);
2506 IWL_CMD(CSR_GP_UCODE_REG);
2507 IWL_CMD(CSR_GP_DRIVER_REG);
2508 IWL_CMD(CSR_UCODE_DRV_GP1);
2509 IWL_CMD(CSR_UCODE_DRV_GP2);
2510 IWL_CMD(CSR_LED_REG);
2511 IWL_CMD(CSR_DRAM_INT_TBL_REG);
2512 IWL_CMD(CSR_GIO_CHICKEN_BITS);
2513 IWL_CMD(CSR_ANA_PLL_CFG);
2514 IWL_CMD(CSR_HW_REV_WA_REG);
2515 IWL_CMD(CSR_MONITOR_STATUS_REG);
2516 IWL_CMD(CSR_DBG_HPET_MEM_REG);
2517 default:
2518 return "UNKNOWN";
2519 }
2520 #undef IWL_CMD
2521 }
2522
iwl_pcie_dump_csr(struct iwl_trans * trans)2523 void iwl_pcie_dump_csr(struct iwl_trans *trans)
2524 {
2525 int i;
2526 static const u32 csr_tbl[] = {
2527 CSR_HW_IF_CONFIG_REG,
2528 CSR_INT_COALESCING,
2529 CSR_INT,
2530 CSR_INT_MASK,
2531 CSR_FH_INT_STATUS,
2532 CSR_GPIO_IN,
2533 CSR_RESET,
2534 CSR_GP_CNTRL,
2535 CSR_HW_REV,
2536 CSR_EEPROM_REG,
2537 CSR_EEPROM_GP,
2538 CSR_OTP_GP_REG,
2539 CSR_GIO_REG,
2540 CSR_GP_UCODE_REG,
2541 CSR_GP_DRIVER_REG,
2542 CSR_UCODE_DRV_GP1,
2543 CSR_UCODE_DRV_GP2,
2544 CSR_LED_REG,
2545 CSR_DRAM_INT_TBL_REG,
2546 CSR_GIO_CHICKEN_BITS,
2547 CSR_ANA_PLL_CFG,
2548 CSR_MONITOR_STATUS_REG,
2549 CSR_HW_REV_WA_REG,
2550 CSR_DBG_HPET_MEM_REG
2551 };
2552 IWL_ERR(trans, "CSR values:\n");
2553 IWL_ERR(trans, "(2nd byte of CSR_INT_COALESCING is "
2554 "CSR_INT_PERIODIC_REG)\n");
2555 for (i = 0; i < ARRAY_SIZE(csr_tbl); i++) {
2556 IWL_ERR(trans, " %25s: 0X%08x\n",
2557 get_csr_string(csr_tbl[i]),
2558 iwl_read32(trans, csr_tbl[i]));
2559 }
2560 }
2561
2562 #ifdef CONFIG_IWLWIFI_DEBUGFS
2563 /* create and remove of files */
2564 #define DEBUGFS_ADD_FILE(name, parent, mode) do { \
2565 debugfs_create_file(#name, mode, parent, trans, \
2566 &iwl_dbgfs_##name##_ops); \
2567 } while (0)
2568
2569 /* file operation */
2570 #define DEBUGFS_READ_FILE_OPS(name) \
2571 static const struct file_operations iwl_dbgfs_##name##_ops = { \
2572 .read = iwl_dbgfs_##name##_read, \
2573 .open = simple_open, \
2574 .llseek = generic_file_llseek, \
2575 };
2576
2577 #define DEBUGFS_WRITE_FILE_OPS(name) \
2578 static const struct file_operations iwl_dbgfs_##name##_ops = { \
2579 .write = iwl_dbgfs_##name##_write, \
2580 .open = simple_open, \
2581 .llseek = generic_file_llseek, \
2582 };
2583
2584 #define DEBUGFS_READ_WRITE_FILE_OPS(name) \
2585 static const struct file_operations iwl_dbgfs_##name##_ops = { \
2586 .write = iwl_dbgfs_##name##_write, \
2587 .read = iwl_dbgfs_##name##_read, \
2588 .open = simple_open, \
2589 .llseek = generic_file_llseek, \
2590 };
2591
2592 struct iwl_dbgfs_tx_queue_priv {
2593 struct iwl_trans *trans;
2594 };
2595
2596 struct iwl_dbgfs_tx_queue_state {
2597 loff_t pos;
2598 };
2599
iwl_dbgfs_tx_queue_seq_start(struct seq_file * seq,loff_t * pos)2600 static void *iwl_dbgfs_tx_queue_seq_start(struct seq_file *seq, loff_t *pos)
2601 {
2602 struct iwl_dbgfs_tx_queue_priv *priv = seq->private;
2603 struct iwl_dbgfs_tx_queue_state *state;
2604
2605 if (*pos >= priv->trans->trans_cfg->base_params->num_of_queues)
2606 return NULL;
2607
2608 state = kmalloc(sizeof(*state), GFP_KERNEL);
2609 if (!state)
2610 return NULL;
2611 state->pos = *pos;
2612 return state;
2613 }
2614
iwl_dbgfs_tx_queue_seq_next(struct seq_file * seq,void * v,loff_t * pos)2615 static void *iwl_dbgfs_tx_queue_seq_next(struct seq_file *seq,
2616 void *v, loff_t *pos)
2617 {
2618 struct iwl_dbgfs_tx_queue_priv *priv = seq->private;
2619 struct iwl_dbgfs_tx_queue_state *state = v;
2620
2621 *pos = ++state->pos;
2622
2623 if (*pos >= priv->trans->trans_cfg->base_params->num_of_queues)
2624 return NULL;
2625
2626 return state;
2627 }
2628
iwl_dbgfs_tx_queue_seq_stop(struct seq_file * seq,void * v)2629 static void iwl_dbgfs_tx_queue_seq_stop(struct seq_file *seq, void *v)
2630 {
2631 kfree(v);
2632 }
2633
iwl_dbgfs_tx_queue_seq_show(struct seq_file * seq,void * v)2634 static int iwl_dbgfs_tx_queue_seq_show(struct seq_file *seq, void *v)
2635 {
2636 struct iwl_dbgfs_tx_queue_priv *priv = seq->private;
2637 struct iwl_dbgfs_tx_queue_state *state = v;
2638 struct iwl_trans *trans = priv->trans;
2639 struct iwl_txq *txq = trans->txqs.txq[state->pos];
2640
2641 seq_printf(seq, "hwq %.3u: used=%d stopped=%d ",
2642 (unsigned int)state->pos,
2643 !!test_bit(state->pos, trans->txqs.queue_used),
2644 !!test_bit(state->pos, trans->txqs.queue_stopped));
2645 if (txq)
2646 seq_printf(seq,
2647 "read=%u write=%u need_update=%d frozen=%d n_window=%d ampdu=%d",
2648 txq->read_ptr, txq->write_ptr,
2649 txq->need_update, txq->frozen,
2650 txq->n_window, txq->ampdu);
2651 else
2652 seq_puts(seq, "(unallocated)");
2653
2654 if (state->pos == trans->txqs.cmd.q_id)
2655 seq_puts(seq, " (HCMD)");
2656 seq_puts(seq, "\n");
2657
2658 return 0;
2659 }
2660
2661 static const struct seq_operations iwl_dbgfs_tx_queue_seq_ops = {
2662 .start = iwl_dbgfs_tx_queue_seq_start,
2663 .next = iwl_dbgfs_tx_queue_seq_next,
2664 .stop = iwl_dbgfs_tx_queue_seq_stop,
2665 .show = iwl_dbgfs_tx_queue_seq_show,
2666 };
2667
iwl_dbgfs_tx_queue_open(struct inode * inode,struct file * filp)2668 static int iwl_dbgfs_tx_queue_open(struct inode *inode, struct file *filp)
2669 {
2670 struct iwl_dbgfs_tx_queue_priv *priv;
2671
2672 priv = __seq_open_private(filp, &iwl_dbgfs_tx_queue_seq_ops,
2673 sizeof(*priv));
2674
2675 if (!priv)
2676 return -ENOMEM;
2677
2678 priv->trans = inode->i_private;
2679 return 0;
2680 }
2681
iwl_dbgfs_rx_queue_read(struct file * file,char __user * user_buf,size_t count,loff_t * ppos)2682 static ssize_t iwl_dbgfs_rx_queue_read(struct file *file,
2683 char __user *user_buf,
2684 size_t count, loff_t *ppos)
2685 {
2686 struct iwl_trans *trans = file->private_data;
2687 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2688 char *buf;
2689 int pos = 0, i, ret;
2690 size_t bufsz;
2691
2692 bufsz = sizeof(char) * 121 * trans->num_rx_queues;
2693
2694 if (!trans_pcie->rxq)
2695 return -EAGAIN;
2696
2697 buf = kzalloc(bufsz, GFP_KERNEL);
2698 if (!buf)
2699 return -ENOMEM;
2700
2701 for (i = 0; i < trans->num_rx_queues && pos < bufsz; i++) {
2702 struct iwl_rxq *rxq = &trans_pcie->rxq[i];
2703
2704 pos += scnprintf(buf + pos, bufsz - pos, "queue#: %2d\n",
2705 i);
2706 pos += scnprintf(buf + pos, bufsz - pos, "\tread: %u\n",
2707 rxq->read);
2708 pos += scnprintf(buf + pos, bufsz - pos, "\twrite: %u\n",
2709 rxq->write);
2710 pos += scnprintf(buf + pos, bufsz - pos, "\twrite_actual: %u\n",
2711 rxq->write_actual);
2712 pos += scnprintf(buf + pos, bufsz - pos, "\tneed_update: %2d\n",
2713 rxq->need_update);
2714 pos += scnprintf(buf + pos, bufsz - pos, "\tfree_count: %u\n",
2715 rxq->free_count);
2716 if (rxq->rb_stts) {
2717 u32 r = iwl_get_closed_rb_stts(trans, rxq);
2718 pos += scnprintf(buf + pos, bufsz - pos,
2719 "\tclosed_rb_num: %u\n", r);
2720 } else {
2721 pos += scnprintf(buf + pos, bufsz - pos,
2722 "\tclosed_rb_num: Not Allocated\n");
2723 }
2724 }
2725 ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
2726 kfree(buf);
2727
2728 return ret;
2729 }
2730
iwl_dbgfs_interrupt_read(struct file * file,char __user * user_buf,size_t count,loff_t * ppos)2731 static ssize_t iwl_dbgfs_interrupt_read(struct file *file,
2732 char __user *user_buf,
2733 size_t count, loff_t *ppos)
2734 {
2735 struct iwl_trans *trans = file->private_data;
2736 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2737 struct isr_statistics *isr_stats = &trans_pcie->isr_stats;
2738
2739 int pos = 0;
2740 char *buf;
2741 int bufsz = 24 * 64; /* 24 items * 64 char per item */
2742 ssize_t ret;
2743
2744 buf = kzalloc(bufsz, GFP_KERNEL);
2745 if (!buf)
2746 return -ENOMEM;
2747
2748 pos += scnprintf(buf + pos, bufsz - pos,
2749 "Interrupt Statistics Report:\n");
2750
2751 pos += scnprintf(buf + pos, bufsz - pos, "HW Error:\t\t\t %u\n",
2752 isr_stats->hw);
2753 pos += scnprintf(buf + pos, bufsz - pos, "SW Error:\t\t\t %u\n",
2754 isr_stats->sw);
2755 if (isr_stats->sw || isr_stats->hw) {
2756 pos += scnprintf(buf + pos, bufsz - pos,
2757 "\tLast Restarting Code: 0x%X\n",
2758 isr_stats->err_code);
2759 }
2760 #ifdef CONFIG_IWLWIFI_DEBUG
2761 pos += scnprintf(buf + pos, bufsz - pos, "Frame transmitted:\t\t %u\n",
2762 isr_stats->sch);
2763 pos += scnprintf(buf + pos, bufsz - pos, "Alive interrupt:\t\t %u\n",
2764 isr_stats->alive);
2765 #endif
2766 pos += scnprintf(buf + pos, bufsz - pos,
2767 "HW RF KILL switch toggled:\t %u\n", isr_stats->rfkill);
2768
2769 pos += scnprintf(buf + pos, bufsz - pos, "CT KILL:\t\t\t %u\n",
2770 isr_stats->ctkill);
2771
2772 pos += scnprintf(buf + pos, bufsz - pos, "Wakeup Interrupt:\t\t %u\n",
2773 isr_stats->wakeup);
2774
2775 pos += scnprintf(buf + pos, bufsz - pos,
2776 "Rx command responses:\t\t %u\n", isr_stats->rx);
2777
2778 pos += scnprintf(buf + pos, bufsz - pos, "Tx/FH interrupt:\t\t %u\n",
2779 isr_stats->tx);
2780
2781 pos += scnprintf(buf + pos, bufsz - pos, "Unexpected INTA:\t\t %u\n",
2782 isr_stats->unhandled);
2783
2784 ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
2785 kfree(buf);
2786 return ret;
2787 }
2788
iwl_dbgfs_interrupt_write(struct file * file,const char __user * user_buf,size_t count,loff_t * ppos)2789 static ssize_t iwl_dbgfs_interrupt_write(struct file *file,
2790 const char __user *user_buf,
2791 size_t count, loff_t *ppos)
2792 {
2793 struct iwl_trans *trans = file->private_data;
2794 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2795 struct isr_statistics *isr_stats = &trans_pcie->isr_stats;
2796 u32 reset_flag;
2797 int ret;
2798
2799 ret = kstrtou32_from_user(user_buf, count, 16, &reset_flag);
2800 if (ret)
2801 return ret;
2802 if (reset_flag == 0)
2803 memset(isr_stats, 0, sizeof(*isr_stats));
2804
2805 return count;
2806 }
2807
iwl_dbgfs_csr_write(struct file * file,const char __user * user_buf,size_t count,loff_t * ppos)2808 static ssize_t iwl_dbgfs_csr_write(struct file *file,
2809 const char __user *user_buf,
2810 size_t count, loff_t *ppos)
2811 {
2812 struct iwl_trans *trans = file->private_data;
2813
2814 iwl_pcie_dump_csr(trans);
2815
2816 return count;
2817 }
2818
iwl_dbgfs_fh_reg_read(struct file * file,char __user * user_buf,size_t count,loff_t * ppos)2819 static ssize_t iwl_dbgfs_fh_reg_read(struct file *file,
2820 char __user *user_buf,
2821 size_t count, loff_t *ppos)
2822 {
2823 struct iwl_trans *trans = file->private_data;
2824 char *buf = NULL;
2825 ssize_t ret;
2826
2827 ret = iwl_dump_fh(trans, &buf);
2828 if (ret < 0)
2829 return ret;
2830 if (!buf)
2831 return -EINVAL;
2832 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
2833 kfree(buf);
2834 return ret;
2835 }
2836
iwl_dbgfs_rfkill_read(struct file * file,char __user * user_buf,size_t count,loff_t * ppos)2837 static ssize_t iwl_dbgfs_rfkill_read(struct file *file,
2838 char __user *user_buf,
2839 size_t count, loff_t *ppos)
2840 {
2841 struct iwl_trans *trans = file->private_data;
2842 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2843 char buf[100];
2844 int pos;
2845
2846 pos = scnprintf(buf, sizeof(buf), "debug: %d\nhw: %d\n",
2847 trans_pcie->debug_rfkill,
2848 !(iwl_read32(trans, CSR_GP_CNTRL) &
2849 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW));
2850
2851 return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
2852 }
2853
iwl_dbgfs_rfkill_write(struct file * file,const char __user * user_buf,size_t count,loff_t * ppos)2854 static ssize_t iwl_dbgfs_rfkill_write(struct file *file,
2855 const char __user *user_buf,
2856 size_t count, loff_t *ppos)
2857 {
2858 struct iwl_trans *trans = file->private_data;
2859 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2860 bool new_value;
2861 int ret;
2862
2863 ret = kstrtobool_from_user(user_buf, count, &new_value);
2864 if (ret)
2865 return ret;
2866 if (new_value == trans_pcie->debug_rfkill)
2867 return count;
2868 IWL_WARN(trans, "changing debug rfkill %d->%d\n",
2869 trans_pcie->debug_rfkill, new_value);
2870 trans_pcie->debug_rfkill = new_value;
2871 iwl_pcie_handle_rfkill_irq(trans, false);
2872
2873 return count;
2874 }
2875
iwl_dbgfs_monitor_data_open(struct inode * inode,struct file * file)2876 static int iwl_dbgfs_monitor_data_open(struct inode *inode,
2877 struct file *file)
2878 {
2879 struct iwl_trans *trans = inode->i_private;
2880 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2881
2882 if (!trans->dbg.dest_tlv ||
2883 trans->dbg.dest_tlv->monitor_mode != EXTERNAL_MODE) {
2884 IWL_ERR(trans, "Debug destination is not set to DRAM\n");
2885 return -ENOENT;
2886 }
2887
2888 if (trans_pcie->fw_mon_data.state != IWL_FW_MON_DBGFS_STATE_CLOSED)
2889 return -EBUSY;
2890
2891 trans_pcie->fw_mon_data.state = IWL_FW_MON_DBGFS_STATE_OPEN;
2892 return simple_open(inode, file);
2893 }
2894
iwl_dbgfs_monitor_data_release(struct inode * inode,struct file * file)2895 static int iwl_dbgfs_monitor_data_release(struct inode *inode,
2896 struct file *file)
2897 {
2898 struct iwl_trans_pcie *trans_pcie =
2899 IWL_TRANS_GET_PCIE_TRANS(inode->i_private);
2900
2901 if (trans_pcie->fw_mon_data.state == IWL_FW_MON_DBGFS_STATE_OPEN)
2902 trans_pcie->fw_mon_data.state = IWL_FW_MON_DBGFS_STATE_CLOSED;
2903 return 0;
2904 }
2905
iwl_write_to_user_buf(char __user * user_buf,ssize_t count,void * buf,ssize_t * size,ssize_t * bytes_copied)2906 static bool iwl_write_to_user_buf(char __user *user_buf, ssize_t count,
2907 void *buf, ssize_t *size,
2908 ssize_t *bytes_copied)
2909 {
2910 ssize_t buf_size_left = count - *bytes_copied;
2911
2912 buf_size_left = buf_size_left - (buf_size_left % sizeof(u32));
2913 if (*size > buf_size_left)
2914 *size = buf_size_left;
2915
2916 *size -= copy_to_user(user_buf, buf, *size);
2917 *bytes_copied += *size;
2918
2919 if (buf_size_left == *size)
2920 return true;
2921 return false;
2922 }
2923
iwl_dbgfs_monitor_data_read(struct file * file,char __user * user_buf,size_t count,loff_t * ppos)2924 static ssize_t iwl_dbgfs_monitor_data_read(struct file *file,
2925 char __user *user_buf,
2926 size_t count, loff_t *ppos)
2927 {
2928 struct iwl_trans *trans = file->private_data;
2929 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2930 u8 *cpu_addr = (void *)trans->dbg.fw_mon.block, *curr_buf;
2931 struct cont_rec *data = &trans_pcie->fw_mon_data;
2932 u32 write_ptr_addr, wrap_cnt_addr, write_ptr, wrap_cnt;
2933 ssize_t size, bytes_copied = 0;
2934 bool b_full;
2935
2936 if (trans->dbg.dest_tlv) {
2937 write_ptr_addr =
2938 le32_to_cpu(trans->dbg.dest_tlv->write_ptr_reg);
2939 wrap_cnt_addr = le32_to_cpu(trans->dbg.dest_tlv->wrap_count);
2940 } else {
2941 write_ptr_addr = MON_BUFF_WRPTR;
2942 wrap_cnt_addr = MON_BUFF_CYCLE_CNT;
2943 }
2944
2945 if (unlikely(!trans->dbg.rec_on))
2946 return 0;
2947
2948 mutex_lock(&data->mutex);
2949 if (data->state ==
2950 IWL_FW_MON_DBGFS_STATE_DISABLED) {
2951 mutex_unlock(&data->mutex);
2952 return 0;
2953 }
2954
2955 /* write_ptr position in bytes rather then DW */
2956 write_ptr = iwl_read_prph(trans, write_ptr_addr) * sizeof(u32);
2957 wrap_cnt = iwl_read_prph(trans, wrap_cnt_addr);
2958
2959 if (data->prev_wrap_cnt == wrap_cnt) {
2960 size = write_ptr - data->prev_wr_ptr;
2961 curr_buf = cpu_addr + data->prev_wr_ptr;
2962 b_full = iwl_write_to_user_buf(user_buf, count,
2963 curr_buf, &size,
2964 &bytes_copied);
2965 data->prev_wr_ptr += size;
2966
2967 } else if (data->prev_wrap_cnt == wrap_cnt - 1 &&
2968 write_ptr < data->prev_wr_ptr) {
2969 size = trans->dbg.fw_mon.size - data->prev_wr_ptr;
2970 curr_buf = cpu_addr + data->prev_wr_ptr;
2971 b_full = iwl_write_to_user_buf(user_buf, count,
2972 curr_buf, &size,
2973 &bytes_copied);
2974 data->prev_wr_ptr += size;
2975
2976 if (!b_full) {
2977 size = write_ptr;
2978 b_full = iwl_write_to_user_buf(user_buf, count,
2979 cpu_addr, &size,
2980 &bytes_copied);
2981 data->prev_wr_ptr = size;
2982 data->prev_wrap_cnt++;
2983 }
2984 } else {
2985 if (data->prev_wrap_cnt == wrap_cnt - 1 &&
2986 write_ptr > data->prev_wr_ptr)
2987 IWL_WARN(trans,
2988 "write pointer passed previous write pointer, start copying from the beginning\n");
2989 else if (!unlikely(data->prev_wrap_cnt == 0 &&
2990 data->prev_wr_ptr == 0))
2991 IWL_WARN(trans,
2992 "monitor data is out of sync, start copying from the beginning\n");
2993
2994 size = write_ptr;
2995 b_full = iwl_write_to_user_buf(user_buf, count,
2996 cpu_addr, &size,
2997 &bytes_copied);
2998 data->prev_wr_ptr = size;
2999 data->prev_wrap_cnt = wrap_cnt;
3000 }
3001
3002 mutex_unlock(&data->mutex);
3003
3004 return bytes_copied;
3005 }
3006
iwl_dbgfs_rf_read(struct file * file,char __user * user_buf,size_t count,loff_t * ppos)3007 static ssize_t iwl_dbgfs_rf_read(struct file *file,
3008 char __user *user_buf,
3009 size_t count, loff_t *ppos)
3010 {
3011 struct iwl_trans *trans = file->private_data;
3012 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
3013
3014 if (!trans_pcie->rf_name[0])
3015 return -ENODEV;
3016
3017 return simple_read_from_buffer(user_buf, count, ppos,
3018 trans_pcie->rf_name,
3019 strlen(trans_pcie->rf_name));
3020 }
3021
3022 DEBUGFS_READ_WRITE_FILE_OPS(interrupt);
3023 DEBUGFS_READ_FILE_OPS(fh_reg);
3024 DEBUGFS_READ_FILE_OPS(rx_queue);
3025 DEBUGFS_WRITE_FILE_OPS(csr);
3026 DEBUGFS_READ_WRITE_FILE_OPS(rfkill);
3027 DEBUGFS_READ_FILE_OPS(rf);
3028
3029 static const struct file_operations iwl_dbgfs_tx_queue_ops = {
3030 .owner = THIS_MODULE,
3031 .open = iwl_dbgfs_tx_queue_open,
3032 .read = seq_read,
3033 .llseek = seq_lseek,
3034 .release = seq_release_private,
3035 };
3036
3037 static const struct file_operations iwl_dbgfs_monitor_data_ops = {
3038 .read = iwl_dbgfs_monitor_data_read,
3039 .open = iwl_dbgfs_monitor_data_open,
3040 .release = iwl_dbgfs_monitor_data_release,
3041 };
3042
3043 /* Create the debugfs files and directories */
iwl_trans_pcie_dbgfs_register(struct iwl_trans * trans)3044 void iwl_trans_pcie_dbgfs_register(struct iwl_trans *trans)
3045 {
3046 struct dentry *dir = trans->dbgfs_dir;
3047
3048 DEBUGFS_ADD_FILE(rx_queue, dir, 0400);
3049 DEBUGFS_ADD_FILE(tx_queue, dir, 0400);
3050 DEBUGFS_ADD_FILE(interrupt, dir, 0600);
3051 DEBUGFS_ADD_FILE(csr, dir, 0200);
3052 DEBUGFS_ADD_FILE(fh_reg, dir, 0400);
3053 DEBUGFS_ADD_FILE(rfkill, dir, 0600);
3054 DEBUGFS_ADD_FILE(monitor_data, dir, 0400);
3055 DEBUGFS_ADD_FILE(rf, dir, 0400);
3056 }
3057
iwl_trans_pcie_debugfs_cleanup(struct iwl_trans * trans)3058 static void iwl_trans_pcie_debugfs_cleanup(struct iwl_trans *trans)
3059 {
3060 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
3061 struct cont_rec *data = &trans_pcie->fw_mon_data;
3062
3063 mutex_lock(&data->mutex);
3064 data->state = IWL_FW_MON_DBGFS_STATE_DISABLED;
3065 mutex_unlock(&data->mutex);
3066 }
3067 #endif /*CONFIG_IWLWIFI_DEBUGFS */
3068
iwl_trans_pcie_get_cmdlen(struct iwl_trans * trans,void * tfd)3069 static u32 iwl_trans_pcie_get_cmdlen(struct iwl_trans *trans, void *tfd)
3070 {
3071 u32 cmdlen = 0;
3072 int i;
3073
3074 for (i = 0; i < trans->txqs.tfd.max_tbs; i++)
3075 cmdlen += iwl_txq_gen1_tfd_tb_get_len(trans, tfd, i);
3076
3077 return cmdlen;
3078 }
3079
iwl_trans_pcie_dump_rbs(struct iwl_trans * trans,struct iwl_fw_error_dump_data ** data,int allocated_rb_nums)3080 static u32 iwl_trans_pcie_dump_rbs(struct iwl_trans *trans,
3081 struct iwl_fw_error_dump_data **data,
3082 int allocated_rb_nums)
3083 {
3084 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
3085 int max_len = trans_pcie->rx_buf_bytes;
3086 /* Dump RBs is supported only for pre-9000 devices (1 queue) */
3087 struct iwl_rxq *rxq = &trans_pcie->rxq[0];
3088 u32 i, r, j, rb_len = 0;
3089
3090 spin_lock_bh(&rxq->lock);
3091
3092 r = iwl_get_closed_rb_stts(trans, rxq);
3093
3094 for (i = rxq->read, j = 0;
3095 i != r && j < allocated_rb_nums;
3096 i = (i + 1) & RX_QUEUE_MASK, j++) {
3097 struct iwl_rx_mem_buffer *rxb = rxq->queue[i];
3098 struct iwl_fw_error_dump_rb *rb;
3099
3100 dma_sync_single_for_cpu(trans->dev, rxb->page_dma,
3101 max_len, DMA_FROM_DEVICE);
3102
3103 rb_len += sizeof(**data) + sizeof(*rb) + max_len;
3104
3105 (*data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_RB);
3106 (*data)->len = cpu_to_le32(sizeof(*rb) + max_len);
3107 rb = (void *)(*data)->data;
3108 rb->index = cpu_to_le32(i);
3109 memcpy(rb->data, page_address(rxb->page), max_len);
3110
3111 *data = iwl_fw_error_next_data(*data);
3112 }
3113
3114 spin_unlock_bh(&rxq->lock);
3115
3116 return rb_len;
3117 }
3118 #define IWL_CSR_TO_DUMP (0x250)
3119
iwl_trans_pcie_dump_csr(struct iwl_trans * trans,struct iwl_fw_error_dump_data ** data)3120 static u32 iwl_trans_pcie_dump_csr(struct iwl_trans *trans,
3121 struct iwl_fw_error_dump_data **data)
3122 {
3123 u32 csr_len = sizeof(**data) + IWL_CSR_TO_DUMP;
3124 __le32 *val;
3125 int i;
3126
3127 (*data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_CSR);
3128 (*data)->len = cpu_to_le32(IWL_CSR_TO_DUMP);
3129 val = (void *)(*data)->data;
3130
3131 for (i = 0; i < IWL_CSR_TO_DUMP; i += 4)
3132 *val++ = cpu_to_le32(iwl_trans_pcie_read32(trans, i));
3133
3134 *data = iwl_fw_error_next_data(*data);
3135
3136 return csr_len;
3137 }
3138
iwl_trans_pcie_fh_regs_dump(struct iwl_trans * trans,struct iwl_fw_error_dump_data ** data)3139 static u32 iwl_trans_pcie_fh_regs_dump(struct iwl_trans *trans,
3140 struct iwl_fw_error_dump_data **data)
3141 {
3142 u32 fh_regs_len = FH_MEM_UPPER_BOUND - FH_MEM_LOWER_BOUND;
3143 __le32 *val;
3144 int i;
3145
3146 if (!iwl_trans_grab_nic_access(trans))
3147 return 0;
3148
3149 (*data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_FH_REGS);
3150 (*data)->len = cpu_to_le32(fh_regs_len);
3151 val = (void *)(*data)->data;
3152
3153 if (!trans->trans_cfg->gen2)
3154 for (i = FH_MEM_LOWER_BOUND; i < FH_MEM_UPPER_BOUND;
3155 i += sizeof(u32))
3156 *val++ = cpu_to_le32(iwl_trans_pcie_read32(trans, i));
3157 else
3158 for (i = iwl_umac_prph(trans, FH_MEM_LOWER_BOUND_GEN2);
3159 i < iwl_umac_prph(trans, FH_MEM_UPPER_BOUND_GEN2);
3160 i += sizeof(u32))
3161 *val++ = cpu_to_le32(iwl_trans_pcie_read_prph(trans,
3162 i));
3163
3164 iwl_trans_release_nic_access(trans);
3165
3166 *data = iwl_fw_error_next_data(*data);
3167
3168 return sizeof(**data) + fh_regs_len;
3169 }
3170
3171 static u32
iwl_trans_pci_dump_marbh_monitor(struct iwl_trans * trans,struct iwl_fw_error_dump_fw_mon * fw_mon_data,u32 monitor_len)3172 iwl_trans_pci_dump_marbh_monitor(struct iwl_trans *trans,
3173 struct iwl_fw_error_dump_fw_mon *fw_mon_data,
3174 u32 monitor_len)
3175 {
3176 u32 buf_size_in_dwords = (monitor_len >> 2);
3177 u32 *buffer = (u32 *)fw_mon_data->data;
3178 u32 i;
3179
3180 if (!iwl_trans_grab_nic_access(trans))
3181 return 0;
3182
3183 iwl_write_umac_prph_no_grab(trans, MON_DMARB_RD_CTL_ADDR, 0x1);
3184 for (i = 0; i < buf_size_in_dwords; i++)
3185 buffer[i] = iwl_read_umac_prph_no_grab(trans,
3186 MON_DMARB_RD_DATA_ADDR);
3187 iwl_write_umac_prph_no_grab(trans, MON_DMARB_RD_CTL_ADDR, 0x0);
3188
3189 iwl_trans_release_nic_access(trans);
3190
3191 return monitor_len;
3192 }
3193
3194 static void
iwl_trans_pcie_dump_pointers(struct iwl_trans * trans,struct iwl_fw_error_dump_fw_mon * fw_mon_data)3195 iwl_trans_pcie_dump_pointers(struct iwl_trans *trans,
3196 struct iwl_fw_error_dump_fw_mon *fw_mon_data)
3197 {
3198 u32 base, base_high, write_ptr, write_ptr_val, wrap_cnt;
3199
3200 if (trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_AX210) {
3201 base = DBGC_CUR_DBGBUF_BASE_ADDR_LSB;
3202 base_high = DBGC_CUR_DBGBUF_BASE_ADDR_MSB;
3203 write_ptr = DBGC_CUR_DBGBUF_STATUS;
3204 wrap_cnt = DBGC_DBGBUF_WRAP_AROUND;
3205 } else if (trans->dbg.dest_tlv) {
3206 write_ptr = le32_to_cpu(trans->dbg.dest_tlv->write_ptr_reg);
3207 wrap_cnt = le32_to_cpu(trans->dbg.dest_tlv->wrap_count);
3208 base = le32_to_cpu(trans->dbg.dest_tlv->base_reg);
3209 } else {
3210 base = MON_BUFF_BASE_ADDR;
3211 write_ptr = MON_BUFF_WRPTR;
3212 wrap_cnt = MON_BUFF_CYCLE_CNT;
3213 }
3214
3215 write_ptr_val = iwl_read_prph(trans, write_ptr);
3216 fw_mon_data->fw_mon_cycle_cnt =
3217 cpu_to_le32(iwl_read_prph(trans, wrap_cnt));
3218 fw_mon_data->fw_mon_base_ptr =
3219 cpu_to_le32(iwl_read_prph(trans, base));
3220 if (trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_AX210) {
3221 fw_mon_data->fw_mon_base_high_ptr =
3222 cpu_to_le32(iwl_read_prph(trans, base_high));
3223 write_ptr_val &= DBGC_CUR_DBGBUF_STATUS_OFFSET_MSK;
3224 /* convert wrtPtr to DWs, to align with all HWs */
3225 write_ptr_val >>= 2;
3226 }
3227 fw_mon_data->fw_mon_wr_ptr = cpu_to_le32(write_ptr_val);
3228 }
3229
3230 static u32
iwl_trans_pcie_dump_monitor(struct iwl_trans * trans,struct iwl_fw_error_dump_data ** data,u32 monitor_len)3231 iwl_trans_pcie_dump_monitor(struct iwl_trans *trans,
3232 struct iwl_fw_error_dump_data **data,
3233 u32 monitor_len)
3234 {
3235 struct iwl_dram_data *fw_mon = &trans->dbg.fw_mon;
3236 u32 len = 0;
3237
3238 if (trans->dbg.dest_tlv ||
3239 (fw_mon->size &&
3240 (trans->trans_cfg->device_family == IWL_DEVICE_FAMILY_7000 ||
3241 trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_AX210))) {
3242 struct iwl_fw_error_dump_fw_mon *fw_mon_data;
3243
3244 (*data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_FW_MONITOR);
3245 fw_mon_data = (void *)(*data)->data;
3246
3247 iwl_trans_pcie_dump_pointers(trans, fw_mon_data);
3248
3249 len += sizeof(**data) + sizeof(*fw_mon_data);
3250 if (fw_mon->size) {
3251 memcpy(fw_mon_data->data, fw_mon->block, fw_mon->size);
3252 monitor_len = fw_mon->size;
3253 } else if (trans->dbg.dest_tlv->monitor_mode == SMEM_MODE) {
3254 u32 base = le32_to_cpu(fw_mon_data->fw_mon_base_ptr);
3255 /*
3256 * Update pointers to reflect actual values after
3257 * shifting
3258 */
3259 if (trans->dbg.dest_tlv->version) {
3260 base = (iwl_read_prph(trans, base) &
3261 IWL_LDBG_M2S_BUF_BA_MSK) <<
3262 trans->dbg.dest_tlv->base_shift;
3263 base *= IWL_M2S_UNIT_SIZE;
3264 base += trans->cfg->smem_offset;
3265 } else {
3266 base = iwl_read_prph(trans, base) <<
3267 trans->dbg.dest_tlv->base_shift;
3268 }
3269
3270 iwl_trans_read_mem(trans, base, fw_mon_data->data,
3271 monitor_len / sizeof(u32));
3272 } else if (trans->dbg.dest_tlv->monitor_mode == MARBH_MODE) {
3273 monitor_len =
3274 iwl_trans_pci_dump_marbh_monitor(trans,
3275 fw_mon_data,
3276 monitor_len);
3277 } else {
3278 /* Didn't match anything - output no monitor data */
3279 monitor_len = 0;
3280 }
3281
3282 len += monitor_len;
3283 (*data)->len = cpu_to_le32(monitor_len + sizeof(*fw_mon_data));
3284 }
3285
3286 return len;
3287 }
3288
iwl_trans_get_fw_monitor_len(struct iwl_trans * trans,u32 * len)3289 static int iwl_trans_get_fw_monitor_len(struct iwl_trans *trans, u32 *len)
3290 {
3291 if (trans->dbg.fw_mon.size) {
3292 *len += sizeof(struct iwl_fw_error_dump_data) +
3293 sizeof(struct iwl_fw_error_dump_fw_mon) +
3294 trans->dbg.fw_mon.size;
3295 return trans->dbg.fw_mon.size;
3296 } else if (trans->dbg.dest_tlv) {
3297 u32 base, end, cfg_reg, monitor_len;
3298
3299 if (trans->dbg.dest_tlv->version == 1) {
3300 cfg_reg = le32_to_cpu(trans->dbg.dest_tlv->base_reg);
3301 cfg_reg = iwl_read_prph(trans, cfg_reg);
3302 base = (cfg_reg & IWL_LDBG_M2S_BUF_BA_MSK) <<
3303 trans->dbg.dest_tlv->base_shift;
3304 base *= IWL_M2S_UNIT_SIZE;
3305 base += trans->cfg->smem_offset;
3306
3307 monitor_len =
3308 (cfg_reg & IWL_LDBG_M2S_BUF_SIZE_MSK) >>
3309 trans->dbg.dest_tlv->end_shift;
3310 monitor_len *= IWL_M2S_UNIT_SIZE;
3311 } else {
3312 base = le32_to_cpu(trans->dbg.dest_tlv->base_reg);
3313 end = le32_to_cpu(trans->dbg.dest_tlv->end_reg);
3314
3315 base = iwl_read_prph(trans, base) <<
3316 trans->dbg.dest_tlv->base_shift;
3317 end = iwl_read_prph(trans, end) <<
3318 trans->dbg.dest_tlv->end_shift;
3319
3320 /* Make "end" point to the actual end */
3321 if (trans->trans_cfg->device_family >=
3322 IWL_DEVICE_FAMILY_8000 ||
3323 trans->dbg.dest_tlv->monitor_mode == MARBH_MODE)
3324 end += (1 << trans->dbg.dest_tlv->end_shift);
3325 monitor_len = end - base;
3326 }
3327 *len += sizeof(struct iwl_fw_error_dump_data) +
3328 sizeof(struct iwl_fw_error_dump_fw_mon) +
3329 monitor_len;
3330 return monitor_len;
3331 }
3332 return 0;
3333 }
3334
3335 static struct iwl_trans_dump_data *
iwl_trans_pcie_dump_data(struct iwl_trans * trans,u32 dump_mask,const struct iwl_dump_sanitize_ops * sanitize_ops,void * sanitize_ctx)3336 iwl_trans_pcie_dump_data(struct iwl_trans *trans,
3337 u32 dump_mask,
3338 const struct iwl_dump_sanitize_ops *sanitize_ops,
3339 void *sanitize_ctx)
3340 {
3341 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
3342 struct iwl_fw_error_dump_data *data;
3343 struct iwl_txq *cmdq = trans->txqs.txq[trans->txqs.cmd.q_id];
3344 struct iwl_fw_error_dump_txcmd *txcmd;
3345 struct iwl_trans_dump_data *dump_data;
3346 u32 len, num_rbs = 0, monitor_len = 0;
3347 int i, ptr;
3348 bool dump_rbs = test_bit(STATUS_FW_ERROR, &trans->status) &&
3349 !trans->trans_cfg->mq_rx_supported &&
3350 dump_mask & BIT(IWL_FW_ERROR_DUMP_RB);
3351
3352 if (!dump_mask)
3353 return NULL;
3354
3355 /* transport dump header */
3356 len = sizeof(*dump_data);
3357
3358 /* host commands */
3359 if (dump_mask & BIT(IWL_FW_ERROR_DUMP_TXCMD) && cmdq)
3360 len += sizeof(*data) +
3361 cmdq->n_window * (sizeof(*txcmd) +
3362 TFD_MAX_PAYLOAD_SIZE);
3363
3364 /* FW monitor */
3365 if (dump_mask & BIT(IWL_FW_ERROR_DUMP_FW_MONITOR))
3366 monitor_len = iwl_trans_get_fw_monitor_len(trans, &len);
3367
3368 /* CSR registers */
3369 if (dump_mask & BIT(IWL_FW_ERROR_DUMP_CSR))
3370 len += sizeof(*data) + IWL_CSR_TO_DUMP;
3371
3372 /* FH registers */
3373 if (dump_mask & BIT(IWL_FW_ERROR_DUMP_FH_REGS)) {
3374 if (trans->trans_cfg->gen2)
3375 len += sizeof(*data) +
3376 (iwl_umac_prph(trans, FH_MEM_UPPER_BOUND_GEN2) -
3377 iwl_umac_prph(trans, FH_MEM_LOWER_BOUND_GEN2));
3378 else
3379 len += sizeof(*data) +
3380 (FH_MEM_UPPER_BOUND -
3381 FH_MEM_LOWER_BOUND);
3382 }
3383
3384 if (dump_rbs) {
3385 /* Dump RBs is supported only for pre-9000 devices (1 queue) */
3386 struct iwl_rxq *rxq = &trans_pcie->rxq[0];
3387 /* RBs */
3388 num_rbs = iwl_get_closed_rb_stts(trans, rxq);
3389 num_rbs = (num_rbs - rxq->read) & RX_QUEUE_MASK;
3390 len += num_rbs * (sizeof(*data) +
3391 sizeof(struct iwl_fw_error_dump_rb) +
3392 (PAGE_SIZE << trans_pcie->rx_page_order));
3393 }
3394
3395 /* Paged memory for gen2 HW */
3396 if (trans->trans_cfg->gen2 && dump_mask & BIT(IWL_FW_ERROR_DUMP_PAGING))
3397 for (i = 0; i < trans->init_dram.paging_cnt; i++)
3398 len += sizeof(*data) +
3399 sizeof(struct iwl_fw_error_dump_paging) +
3400 trans->init_dram.paging[i].size;
3401
3402 dump_data = vzalloc(len);
3403 if (!dump_data)
3404 return NULL;
3405
3406 len = 0;
3407 data = (void *)dump_data->data;
3408
3409 if (dump_mask & BIT(IWL_FW_ERROR_DUMP_TXCMD) && cmdq) {
3410 u16 tfd_size = trans->txqs.tfd.size;
3411
3412 data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_TXCMD);
3413 txcmd = (void *)data->data;
3414 spin_lock_bh(&cmdq->lock);
3415 ptr = cmdq->write_ptr;
3416 for (i = 0; i < cmdq->n_window; i++) {
3417 u8 idx = iwl_txq_get_cmd_index(cmdq, ptr);
3418 u8 tfdidx;
3419 u32 caplen, cmdlen;
3420
3421 if (trans->trans_cfg->gen2)
3422 tfdidx = idx;
3423 else
3424 tfdidx = ptr;
3425
3426 cmdlen = iwl_trans_pcie_get_cmdlen(trans,
3427 (u8 *)cmdq->tfds +
3428 tfd_size * tfdidx);
3429 caplen = min_t(u32, TFD_MAX_PAYLOAD_SIZE, cmdlen);
3430
3431 if (cmdlen) {
3432 len += sizeof(*txcmd) + caplen;
3433 txcmd->cmdlen = cpu_to_le32(cmdlen);
3434 txcmd->caplen = cpu_to_le32(caplen);
3435 memcpy(txcmd->data, cmdq->entries[idx].cmd,
3436 caplen);
3437 if (sanitize_ops && sanitize_ops->frob_hcmd)
3438 sanitize_ops->frob_hcmd(sanitize_ctx,
3439 txcmd->data,
3440 caplen);
3441 txcmd = (void *)((u8 *)txcmd->data + caplen);
3442 }
3443
3444 ptr = iwl_txq_dec_wrap(trans, ptr);
3445 }
3446 spin_unlock_bh(&cmdq->lock);
3447
3448 data->len = cpu_to_le32(len);
3449 len += sizeof(*data);
3450 data = iwl_fw_error_next_data(data);
3451 }
3452
3453 if (dump_mask & BIT(IWL_FW_ERROR_DUMP_CSR))
3454 len += iwl_trans_pcie_dump_csr(trans, &data);
3455 if (dump_mask & BIT(IWL_FW_ERROR_DUMP_FH_REGS))
3456 len += iwl_trans_pcie_fh_regs_dump(trans, &data);
3457 if (dump_rbs)
3458 len += iwl_trans_pcie_dump_rbs(trans, &data, num_rbs);
3459
3460 /* Paged memory for gen2 HW */
3461 if (trans->trans_cfg->gen2 &&
3462 dump_mask & BIT(IWL_FW_ERROR_DUMP_PAGING)) {
3463 for (i = 0; i < trans->init_dram.paging_cnt; i++) {
3464 struct iwl_fw_error_dump_paging *paging;
3465 u32 page_len = trans->init_dram.paging[i].size;
3466
3467 data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_PAGING);
3468 data->len = cpu_to_le32(sizeof(*paging) + page_len);
3469 paging = (void *)data->data;
3470 paging->index = cpu_to_le32(i);
3471 memcpy(paging->data,
3472 trans->init_dram.paging[i].block, page_len);
3473 data = iwl_fw_error_next_data(data);
3474
3475 len += sizeof(*data) + sizeof(*paging) + page_len;
3476 }
3477 }
3478 if (dump_mask & BIT(IWL_FW_ERROR_DUMP_FW_MONITOR))
3479 len += iwl_trans_pcie_dump_monitor(trans, &data, monitor_len);
3480
3481 dump_data->len = len;
3482
3483 return dump_data;
3484 }
3485
iwl_trans_pci_interrupts(struct iwl_trans * trans,bool enable)3486 static void iwl_trans_pci_interrupts(struct iwl_trans *trans, bool enable)
3487 {
3488 if (enable)
3489 iwl_enable_interrupts(trans);
3490 else
3491 iwl_disable_interrupts(trans);
3492 }
3493
iwl_trans_pcie_sync_nmi(struct iwl_trans * trans)3494 static void iwl_trans_pcie_sync_nmi(struct iwl_trans *trans)
3495 {
3496 u32 inta_addr, sw_err_bit;
3497 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
3498
3499 if (trans_pcie->msix_enabled) {
3500 inta_addr = CSR_MSIX_HW_INT_CAUSES_AD;
3501 if (trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_BZ)
3502 sw_err_bit = MSIX_HW_INT_CAUSES_REG_SW_ERR_BZ;
3503 else
3504 sw_err_bit = MSIX_HW_INT_CAUSES_REG_SW_ERR;
3505 } else {
3506 inta_addr = CSR_INT;
3507 sw_err_bit = CSR_INT_BIT_SW_ERR;
3508 }
3509
3510 iwl_trans_sync_nmi_with_addr(trans, inta_addr, sw_err_bit);
3511 }
3512
3513 #define IWL_TRANS_COMMON_OPS \
3514 .op_mode_leave = iwl_trans_pcie_op_mode_leave, \
3515 .write8 = iwl_trans_pcie_write8, \
3516 .write32 = iwl_trans_pcie_write32, \
3517 .read32 = iwl_trans_pcie_read32, \
3518 .read_prph = iwl_trans_pcie_read_prph, \
3519 .write_prph = iwl_trans_pcie_write_prph, \
3520 .read_mem = iwl_trans_pcie_read_mem, \
3521 .write_mem = iwl_trans_pcie_write_mem, \
3522 .read_config32 = iwl_trans_pcie_read_config32, \
3523 .configure = iwl_trans_pcie_configure, \
3524 .set_pmi = iwl_trans_pcie_set_pmi, \
3525 .sw_reset = iwl_trans_pcie_sw_reset, \
3526 .grab_nic_access = iwl_trans_pcie_grab_nic_access, \
3527 .release_nic_access = iwl_trans_pcie_release_nic_access, \
3528 .set_bits_mask = iwl_trans_pcie_set_bits_mask, \
3529 .dump_data = iwl_trans_pcie_dump_data, \
3530 .d3_suspend = iwl_trans_pcie_d3_suspend, \
3531 .d3_resume = iwl_trans_pcie_d3_resume, \
3532 .interrupts = iwl_trans_pci_interrupts, \
3533 .sync_nmi = iwl_trans_pcie_sync_nmi, \
3534 .imr_dma_data = iwl_trans_pcie_copy_imr \
3535
3536 static const struct iwl_trans_ops trans_ops_pcie = {
3537 IWL_TRANS_COMMON_OPS,
3538 .start_hw = iwl_trans_pcie_start_hw,
3539 .fw_alive = iwl_trans_pcie_fw_alive,
3540 .start_fw = iwl_trans_pcie_start_fw,
3541 .stop_device = iwl_trans_pcie_stop_device,
3542
3543 .send_cmd = iwl_pcie_enqueue_hcmd,
3544
3545 .tx = iwl_trans_pcie_tx,
3546 .reclaim = iwl_txq_reclaim,
3547
3548 .txq_disable = iwl_trans_pcie_txq_disable,
3549 .txq_enable = iwl_trans_pcie_txq_enable,
3550
3551 .txq_set_shared_mode = iwl_trans_pcie_txq_set_shared_mode,
3552
3553 .wait_tx_queues_empty = iwl_trans_pcie_wait_txqs_empty,
3554
3555 .freeze_txq_timer = iwl_trans_txq_freeze_timer,
3556 #ifdef CONFIG_IWLWIFI_DEBUGFS
3557 .debugfs_cleanup = iwl_trans_pcie_debugfs_cleanup,
3558 #endif
3559 };
3560
3561 static const struct iwl_trans_ops trans_ops_pcie_gen2 = {
3562 IWL_TRANS_COMMON_OPS,
3563 .start_hw = iwl_trans_pcie_start_hw,
3564 .fw_alive = iwl_trans_pcie_gen2_fw_alive,
3565 .start_fw = iwl_trans_pcie_gen2_start_fw,
3566 .stop_device = iwl_trans_pcie_gen2_stop_device,
3567
3568 .send_cmd = iwl_pcie_gen2_enqueue_hcmd,
3569
3570 .tx = iwl_txq_gen2_tx,
3571 .reclaim = iwl_txq_reclaim,
3572
3573 .set_q_ptrs = iwl_txq_set_q_ptrs,
3574
3575 .txq_alloc = iwl_txq_dyn_alloc,
3576 .txq_free = iwl_txq_dyn_free,
3577 .wait_txq_empty = iwl_trans_pcie_wait_txq_empty,
3578 .rxq_dma_data = iwl_trans_pcie_rxq_dma_data,
3579 .load_pnvm = iwl_trans_pcie_ctx_info_gen3_load_pnvm,
3580 .set_pnvm = iwl_trans_pcie_ctx_info_gen3_set_pnvm,
3581 .load_reduce_power = iwl_trans_pcie_ctx_info_gen3_load_reduce_power,
3582 .set_reduce_power = iwl_trans_pcie_ctx_info_gen3_set_reduce_power,
3583 #ifdef CONFIG_IWLWIFI_DEBUGFS
3584 .debugfs_cleanup = iwl_trans_pcie_debugfs_cleanup,
3585 #endif
3586 };
3587
iwl_trans_pcie_alloc(struct pci_dev * pdev,const struct pci_device_id * ent,const struct iwl_cfg_trans_params * cfg_trans)3588 struct iwl_trans *iwl_trans_pcie_alloc(struct pci_dev *pdev,
3589 const struct pci_device_id *ent,
3590 const struct iwl_cfg_trans_params *cfg_trans)
3591 {
3592 struct iwl_trans_pcie *trans_pcie, **priv;
3593 struct iwl_trans *trans;
3594 int ret, addr_size;
3595 const struct iwl_trans_ops *ops = &trans_ops_pcie_gen2;
3596 void __iomem * const *table;
3597 u32 bar0;
3598
3599 if (!cfg_trans->gen2)
3600 ops = &trans_ops_pcie;
3601
3602 /* reassign our BAR 0 if invalid due to possible runtime PM races */
3603 pci_read_config_dword(pdev, PCI_BASE_ADDRESS_0, &bar0);
3604 if (bar0 == PCI_BASE_ADDRESS_MEM_TYPE_64) {
3605 ret = pci_assign_resource(pdev, 0);
3606 if (ret)
3607 return ERR_PTR(ret);
3608 }
3609
3610 ret = pcim_enable_device(pdev);
3611 if (ret)
3612 return ERR_PTR(ret);
3613
3614 trans = iwl_trans_alloc(sizeof(struct iwl_trans_pcie), &pdev->dev, ops,
3615 cfg_trans);
3616 if (!trans)
3617 return ERR_PTR(-ENOMEM);
3618
3619 trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
3620
3621 /* Initialize NAPI here - it should be before registering to mac80211
3622 * in the opmode but after the HW struct is allocated.
3623 */
3624 trans_pcie->napi_dev = alloc_netdev_dummy(sizeof(struct iwl_trans_pcie *));
3625 if (!trans_pcie->napi_dev) {
3626 ret = -ENOMEM;
3627 goto out_free_trans;
3628 }
3629 /* The private struct in netdev is a pointer to struct iwl_trans_pcie */
3630 priv = netdev_priv(trans_pcie->napi_dev);
3631 *priv = trans_pcie;
3632
3633 trans_pcie->trans = trans;
3634 trans_pcie->opmode_down = true;
3635 spin_lock_init(&trans_pcie->irq_lock);
3636 spin_lock_init(&trans_pcie->reg_lock);
3637 spin_lock_init(&trans_pcie->alloc_page_lock);
3638 mutex_init(&trans_pcie->mutex);
3639 init_waitqueue_head(&trans_pcie->ucode_write_waitq);
3640 init_waitqueue_head(&trans_pcie->fw_reset_waitq);
3641 init_waitqueue_head(&trans_pcie->imr_waitq);
3642
3643 trans_pcie->rba.alloc_wq = alloc_workqueue("rb_allocator",
3644 WQ_HIGHPRI | WQ_UNBOUND, 0);
3645 if (!trans_pcie->rba.alloc_wq) {
3646 ret = -ENOMEM;
3647 goto out_free_ndev;
3648 }
3649 INIT_WORK(&trans_pcie->rba.rx_alloc, iwl_pcie_rx_allocator_work);
3650
3651 trans_pcie->debug_rfkill = -1;
3652
3653 if (!cfg_trans->base_params->pcie_l1_allowed) {
3654 /*
3655 * W/A - seems to solve weird behavior. We need to remove this
3656 * if we don't want to stay in L1 all the time. This wastes a
3657 * lot of power.
3658 */
3659 pci_disable_link_state(pdev, PCIE_LINK_STATE_L0S |
3660 PCIE_LINK_STATE_L1 |
3661 PCIE_LINK_STATE_CLKPM);
3662 }
3663
3664 pci_set_master(pdev);
3665
3666 addr_size = trans->txqs.tfd.addr_size;
3667 ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(addr_size));
3668 if (ret) {
3669 ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
3670 /* both attempts failed: */
3671 if (ret) {
3672 dev_err(&pdev->dev, "No suitable DMA available\n");
3673 goto out_no_pci;
3674 }
3675 }
3676
3677 ret = pcim_iomap_regions_request_all(pdev, BIT(0), DRV_NAME);
3678 if (ret) {
3679 dev_err(&pdev->dev, "pcim_iomap_regions_request_all failed\n");
3680 goto out_no_pci;
3681 }
3682
3683 table = pcim_iomap_table(pdev);
3684 if (!table) {
3685 dev_err(&pdev->dev, "pcim_iomap_table failed\n");
3686 ret = -ENOMEM;
3687 goto out_no_pci;
3688 }
3689
3690 trans_pcie->hw_base = table[0];
3691 if (!trans_pcie->hw_base) {
3692 dev_err(&pdev->dev, "couldn't find IO mem in first BAR\n");
3693 ret = -ENODEV;
3694 goto out_no_pci;
3695 }
3696
3697 /* We disable the RETRY_TIMEOUT register (0x41) to keep
3698 * PCI Tx retries from interfering with C3 CPU state */
3699 pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
3700
3701 trans_pcie->pci_dev = pdev;
3702 iwl_disable_interrupts(trans);
3703
3704 trans->hw_rev = iwl_read32(trans, CSR_HW_REV);
3705 if (trans->hw_rev == 0xffffffff) {
3706 dev_err(&pdev->dev, "HW_REV=0xFFFFFFFF, PCI issues?\n");
3707 ret = -EIO;
3708 goto out_no_pci;
3709 }
3710
3711 /*
3712 * In the 8000 HW family the format of the 4 bytes of CSR_HW_REV have
3713 * changed, and now the revision step also includes bit 0-1 (no more
3714 * "dash" value). To keep hw_rev backwards compatible - we'll store it
3715 * in the old format.
3716 */
3717 if (cfg_trans->device_family >= IWL_DEVICE_FAMILY_8000)
3718 trans->hw_rev_step = trans->hw_rev & 0xF;
3719 else
3720 trans->hw_rev_step = (trans->hw_rev & 0xC) >> 2;
3721
3722 IWL_DEBUG_INFO(trans, "HW REV: 0x%0x\n", trans->hw_rev);
3723
3724 iwl_pcie_set_interrupt_capa(pdev, trans, cfg_trans);
3725 trans->hw_id = (pdev->device << 16) + pdev->subsystem_device;
3726 snprintf(trans->hw_id_str, sizeof(trans->hw_id_str),
3727 "PCI ID: 0x%04X:0x%04X", pdev->device, pdev->subsystem_device);
3728
3729 init_waitqueue_head(&trans_pcie->sx_waitq);
3730
3731 ret = iwl_pcie_alloc_invalid_tx_cmd(trans);
3732 if (ret)
3733 goto out_no_pci;
3734
3735 if (trans_pcie->msix_enabled) {
3736 ret = iwl_pcie_init_msix_handler(pdev, trans_pcie);
3737 if (ret)
3738 goto out_no_pci;
3739 } else {
3740 ret = iwl_pcie_alloc_ict(trans);
3741 if (ret)
3742 goto out_no_pci;
3743
3744 ret = devm_request_threaded_irq(&pdev->dev, pdev->irq,
3745 iwl_pcie_isr,
3746 iwl_pcie_irq_handler,
3747 IRQF_SHARED, DRV_NAME, trans);
3748 if (ret) {
3749 IWL_ERR(trans, "Error allocating IRQ %d\n", pdev->irq);
3750 goto out_free_ict;
3751 }
3752 }
3753
3754 #ifdef CONFIG_IWLWIFI_DEBUGFS
3755 trans_pcie->fw_mon_data.state = IWL_FW_MON_DBGFS_STATE_CLOSED;
3756 mutex_init(&trans_pcie->fw_mon_data.mutex);
3757 #endif
3758
3759 iwl_dbg_tlv_init(trans);
3760
3761 return trans;
3762
3763 out_free_ict:
3764 iwl_pcie_free_ict(trans);
3765 out_no_pci:
3766 destroy_workqueue(trans_pcie->rba.alloc_wq);
3767 out_free_ndev:
3768 free_netdev(trans_pcie->napi_dev);
3769 out_free_trans:
3770 iwl_trans_free(trans);
3771 return ERR_PTR(ret);
3772 }
3773
iwl_trans_pcie_copy_imr_fh(struct iwl_trans * trans,u32 dst_addr,u64 src_addr,u32 byte_cnt)3774 void iwl_trans_pcie_copy_imr_fh(struct iwl_trans *trans,
3775 u32 dst_addr, u64 src_addr, u32 byte_cnt)
3776 {
3777 iwl_write_prph(trans, IMR_UREG_CHICK,
3778 iwl_read_prph(trans, IMR_UREG_CHICK) |
3779 IMR_UREG_CHICK_HALT_UMAC_PERMANENTLY_MSK);
3780 iwl_write_prph(trans, IMR_TFH_SRV_DMA_CHNL0_SRAM_ADDR, dst_addr);
3781 iwl_write_prph(trans, IMR_TFH_SRV_DMA_CHNL0_DRAM_ADDR_LSB,
3782 (u32)(src_addr & 0xFFFFFFFF));
3783 iwl_write_prph(trans, IMR_TFH_SRV_DMA_CHNL0_DRAM_ADDR_MSB,
3784 iwl_get_dma_hi_addr(src_addr));
3785 iwl_write_prph(trans, IMR_TFH_SRV_DMA_CHNL0_BC, byte_cnt);
3786 iwl_write_prph(trans, IMR_TFH_SRV_DMA_CHNL0_CTRL,
3787 IMR_TFH_SRV_DMA_CHNL0_CTRL_D2S_IRQ_TARGET_POS |
3788 IMR_TFH_SRV_DMA_CHNL0_CTRL_D2S_DMA_EN_POS |
3789 IMR_TFH_SRV_DMA_CHNL0_CTRL_D2S_RS_MSK);
3790 }
3791
iwl_trans_pcie_copy_imr(struct iwl_trans * trans,u32 dst_addr,u64 src_addr,u32 byte_cnt)3792 int iwl_trans_pcie_copy_imr(struct iwl_trans *trans,
3793 u32 dst_addr, u64 src_addr, u32 byte_cnt)
3794 {
3795 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
3796 int ret = -1;
3797
3798 trans_pcie->imr_status = IMR_D2S_REQUESTED;
3799 iwl_trans_pcie_copy_imr_fh(trans, dst_addr, src_addr, byte_cnt);
3800 ret = wait_event_timeout(trans_pcie->imr_waitq,
3801 trans_pcie->imr_status !=
3802 IMR_D2S_REQUESTED, 5 * HZ);
3803 if (!ret || trans_pcie->imr_status == IMR_D2S_ERROR) {
3804 IWL_ERR(trans, "Failed to copy IMR Memory chunk!\n");
3805 iwl_trans_pcie_dump_regs(trans);
3806 return -ETIMEDOUT;
3807 }
3808 trans_pcie->imr_status = IMR_D2S_IDLE;
3809 return 0;
3810 }
3811