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1// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
2/*
3 * Copyright (C) 2003-2014, 2018-2022 Intel Corporation
4 * Copyright (C) 2015-2016 Intel Deutschland GmbH
5 */
6#include <linux/delay.h>
7#include <linux/device.h>
8#include <linux/export.h>
9
10#include "iwl-drv.h"
11#include "iwl-io.h"
12#include "iwl-csr.h"
13#include "iwl-debug.h"
14#include "iwl-prph.h"
15#include "iwl-fh.h"
16
17void iwl_write8(struct iwl_trans *trans, u32 ofs, u8 val)
18{
19 trace_iwlwifi_dev_iowrite8(trans->dev, ofs, val);
20 iwl_trans_write8(trans, ofs, val);
21}
22IWL_EXPORT_SYMBOL(iwl_write8);
23
24void iwl_write32(struct iwl_trans *trans, u32 ofs, u32 val)
25{
26 trace_iwlwifi_dev_iowrite32(trans->dev, ofs, val);
27 iwl_trans_write32(trans, ofs, val);
28}
29IWL_EXPORT_SYMBOL(iwl_write32);
30
31void iwl_write64(struct iwl_trans *trans, u64 ofs, u64 val)
32{
33 trace_iwlwifi_dev_iowrite64(trans->dev, ofs, val);
34 iwl_trans_write32(trans, ofs, lower_32_bits(val));
35 iwl_trans_write32(trans, ofs + 4, upper_32_bits(val));
36}
37IWL_EXPORT_SYMBOL(iwl_write64);
38
39u32 iwl_read32(struct iwl_trans *trans, u32 ofs)
40{
41 u32 val = iwl_trans_read32(trans, ofs);
42
43 trace_iwlwifi_dev_ioread32(trans->dev, ofs, val);
44 return val;
45}
46IWL_EXPORT_SYMBOL(iwl_read32);
47
48#define IWL_POLL_INTERVAL 10 /* microseconds */
49
50int iwl_poll_bit(struct iwl_trans *trans, u32 addr,
51 u32 bits, u32 mask, int timeout)
52{
53 int t = 0;
54
55 do {
56 if ((iwl_read32(trans, addr) & mask) == (bits & mask))
57 return t;
58 udelay(IWL_POLL_INTERVAL);
59 t += IWL_POLL_INTERVAL;
60 } while (t < timeout);
61
62 return -ETIMEDOUT;
63}
64IWL_EXPORT_SYMBOL(iwl_poll_bit);
65
66u32 iwl_read_direct32(struct iwl_trans *trans, u32 reg)
67{
68 if (iwl_trans_grab_nic_access(trans)) {
69 u32 value = iwl_read32(trans, reg);
70
71 iwl_trans_release_nic_access(trans);
72 return value;
73 }
74
75 /* return as if we have a HW timeout/failure */
76 return 0x5a5a5a5a;
77}
78IWL_EXPORT_SYMBOL(iwl_read_direct32);
79
80void iwl_write_direct32(struct iwl_trans *trans, u32 reg, u32 value)
81{
82 if (iwl_trans_grab_nic_access(trans)) {
83 iwl_write32(trans, reg, value);
84 iwl_trans_release_nic_access(trans);
85 }
86}
87IWL_EXPORT_SYMBOL(iwl_write_direct32);
88
89void iwl_write_direct64(struct iwl_trans *trans, u64 reg, u64 value)
90{
91 if (iwl_trans_grab_nic_access(trans)) {
92 iwl_write64(trans, reg, value);
93 iwl_trans_release_nic_access(trans);
94 }
95}
96IWL_EXPORT_SYMBOL(iwl_write_direct64);
97
98int iwl_poll_direct_bit(struct iwl_trans *trans, u32 addr, u32 mask,
99 int timeout)
100{
101 int t = 0;
102
103 do {
104 if ((iwl_read_direct32(trans, addr) & mask) == mask)
105 return t;
106 udelay(IWL_POLL_INTERVAL);
107 t += IWL_POLL_INTERVAL;
108 } while (t < timeout);
109
110 return -ETIMEDOUT;
111}
112IWL_EXPORT_SYMBOL(iwl_poll_direct_bit);
113
114u32 iwl_read_prph_no_grab(struct iwl_trans *trans, u32 ofs)
115{
116 u32 val = iwl_trans_read_prph(trans, ofs);
117 trace_iwlwifi_dev_ioread_prph32(trans->dev, ofs, val);
118 return val;
119}
120IWL_EXPORT_SYMBOL(iwl_read_prph_no_grab);
121
122void iwl_write_prph_no_grab(struct iwl_trans *trans, u32 ofs, u32 val)
123{
124 trace_iwlwifi_dev_iowrite_prph32(trans->dev, ofs, val);
125 iwl_trans_write_prph(trans, ofs, val);
126}
127IWL_EXPORT_SYMBOL(iwl_write_prph_no_grab);
128
129void iwl_write_prph64_no_grab(struct iwl_trans *trans, u64 ofs, u64 val)
130{
131 trace_iwlwifi_dev_iowrite_prph64(trans->dev, ofs, val);
132 iwl_write_prph_no_grab(trans, ofs, val & 0xffffffff);
133 iwl_write_prph_no_grab(trans, ofs + 4, val >> 32);
134}
135IWL_EXPORT_SYMBOL(iwl_write_prph64_no_grab);
136
137u32 iwl_read_prph(struct iwl_trans *trans, u32 ofs)
138{
139 if (iwl_trans_grab_nic_access(trans)) {
140 u32 val = iwl_read_prph_no_grab(trans, ofs);
141
142 iwl_trans_release_nic_access(trans);
143
144 return val;
145 }
146
147 /* return as if we have a HW timeout/failure */
148 return 0x5a5a5a5a;
149}
150IWL_EXPORT_SYMBOL(iwl_read_prph);
151
152void iwl_write_prph_delay(struct iwl_trans *trans, u32 ofs, u32 val, u32 delay_ms)
153{
154 if (iwl_trans_grab_nic_access(trans)) {
155 mdelay(delay_ms);
156 iwl_write_prph_no_grab(trans, ofs, val);
157 iwl_trans_release_nic_access(trans);
158 }
159}
160IWL_EXPORT_SYMBOL(iwl_write_prph_delay);
161
162int iwl_poll_prph_bit(struct iwl_trans *trans, u32 addr,
163 u32 bits, u32 mask, int timeout)
164{
165 int t = 0;
166
167 do {
168 if ((iwl_read_prph(trans, addr) & mask) == (bits & mask))
169 return t;
170 udelay(IWL_POLL_INTERVAL);
171 t += IWL_POLL_INTERVAL;
172 } while (t < timeout);
173
174 return -ETIMEDOUT;
175}
176
177void iwl_set_bits_prph(struct iwl_trans *trans, u32 ofs, u32 mask)
178{
179 if (iwl_trans_grab_nic_access(trans)) {
180 iwl_write_prph_no_grab(trans, ofs,
181 iwl_read_prph_no_grab(trans, ofs) |
182 mask);
183 iwl_trans_release_nic_access(trans);
184 }
185}
186IWL_EXPORT_SYMBOL(iwl_set_bits_prph);
187
188void iwl_set_bits_mask_prph(struct iwl_trans *trans, u32 ofs,
189 u32 bits, u32 mask)
190{
191 if (iwl_trans_grab_nic_access(trans)) {
192 iwl_write_prph_no_grab(trans, ofs,
193 (iwl_read_prph_no_grab(trans, ofs) &
194 mask) | bits);
195 iwl_trans_release_nic_access(trans);
196 }
197}
198IWL_EXPORT_SYMBOL(iwl_set_bits_mask_prph);
199
200void iwl_clear_bits_prph(struct iwl_trans *trans, u32 ofs, u32 mask)
201{
202 u32 val;
203
204 if (iwl_trans_grab_nic_access(trans)) {
205 val = iwl_read_prph_no_grab(trans, ofs);
206 iwl_write_prph_no_grab(trans, ofs, (val & ~mask));
207 iwl_trans_release_nic_access(trans);
208 }
209}
210IWL_EXPORT_SYMBOL(iwl_clear_bits_prph);
211
212void iwl_force_nmi(struct iwl_trans *trans)
213{
214 if (trans->trans_cfg->device_family < IWL_DEVICE_FAMILY_9000)
215 iwl_write_prph_delay(trans, DEVICE_SET_NMI_REG,
216 DEVICE_SET_NMI_VAL_DRV, 1);
217 else if (trans->trans_cfg->device_family < IWL_DEVICE_FAMILY_AX210)
218 iwl_write_umac_prph(trans, UREG_NIC_SET_NMI_DRIVER,
219 UREG_NIC_SET_NMI_DRIVER_NMI_FROM_DRIVER);
220 else if (trans->trans_cfg->device_family < IWL_DEVICE_FAMILY_BZ)
221 iwl_write_umac_prph(trans, UREG_DOORBELL_TO_ISR6,
222 UREG_DOORBELL_TO_ISR6_NMI_BIT);
223 else
224 iwl_write32(trans, CSR_DOORBELL_VECTOR,
225 UREG_DOORBELL_TO_ISR6_NMI_BIT);
226}
227IWL_EXPORT_SYMBOL(iwl_force_nmi);
228
229static const char *get_rfh_string(int cmd)
230{
231#define IWL_CMD(x) case x: return #x
232#define IWL_CMD_MQ(arg, reg, q) { if (arg == reg(q)) return #reg; }
233
234 int i;
235
236 for (i = 0; i < IWL_MAX_RX_HW_QUEUES; i++) {
237 IWL_CMD_MQ(cmd, RFH_Q_FRBDCB_BA_LSB, i);
238 IWL_CMD_MQ(cmd, RFH_Q_FRBDCB_WIDX, i);
239 IWL_CMD_MQ(cmd, RFH_Q_FRBDCB_RIDX, i);
240 IWL_CMD_MQ(cmd, RFH_Q_URBD_STTS_WPTR_LSB, i);
241 }
242
243 switch (cmd) {
244 IWL_CMD(RFH_RXF_DMA_CFG);
245 IWL_CMD(RFH_GEN_CFG);
246 IWL_CMD(RFH_GEN_STATUS);
247 IWL_CMD(FH_TSSR_TX_STATUS_REG);
248 IWL_CMD(FH_TSSR_TX_ERROR_REG);
249 default:
250 return "UNKNOWN";
251 }
252#undef IWL_CMD_MQ
253}
254
255struct reg {
256 u32 addr;
257 bool is64;
258};
259
260static int iwl_dump_rfh(struct iwl_trans *trans, char **buf)
261{
262 int i, q;
263 int num_q = trans->num_rx_queues;
264 static const u32 rfh_tbl[] = {
265 RFH_RXF_DMA_CFG,
266 RFH_GEN_CFG,
267 RFH_GEN_STATUS,
268 FH_TSSR_TX_STATUS_REG,
269 FH_TSSR_TX_ERROR_REG,
270 };
271 static const struct reg rfh_mq_tbl[] = {
272 { RFH_Q0_FRBDCB_BA_LSB, true },
273 { RFH_Q0_FRBDCB_WIDX, false },
274 { RFH_Q0_FRBDCB_RIDX, false },
275 { RFH_Q0_URBD_STTS_WPTR_LSB, true },
276 };
277
278#ifdef CONFIG_IWLWIFI_DEBUGFS
279 if (buf) {
280 int pos = 0;
281 /*
282 * Register (up to 34 for name + 8 blank/q for MQ): 40 chars
283 * Colon + space: 2 characters
284 * 0X%08x: 10 characters
285 * New line: 1 character
286 * Total of 53 characters
287 */
288 size_t bufsz = ARRAY_SIZE(rfh_tbl) * 53 +
289 ARRAY_SIZE(rfh_mq_tbl) * 53 * num_q + 40;
290
291 *buf = kmalloc(bufsz, GFP_KERNEL);
292 if (!*buf)
293 return -ENOMEM;
294
295 pos += scnprintf(*buf + pos, bufsz - pos,
296 "RFH register values:\n");
297
298 for (i = 0; i < ARRAY_SIZE(rfh_tbl); i++)
299 pos += scnprintf(*buf + pos, bufsz - pos,
300 "%40s: 0X%08x\n",
301 get_rfh_string(rfh_tbl[i]),
302 iwl_read_prph(trans, rfh_tbl[i]));
303
304 for (i = 0; i < ARRAY_SIZE(rfh_mq_tbl); i++)
305 for (q = 0; q < num_q; q++) {
306 u32 addr = rfh_mq_tbl[i].addr;
307
308 addr += q * (rfh_mq_tbl[i].is64 ? 8 : 4);
309 pos += scnprintf(*buf + pos, bufsz - pos,
310 "%34s(q %2d): 0X%08x\n",
311 get_rfh_string(addr), q,
312 iwl_read_prph(trans, addr));
313 }
314
315 return pos;
316 }
317#endif
318
319 IWL_ERR(trans, "RFH register values:\n");
320 for (i = 0; i < ARRAY_SIZE(rfh_tbl); i++)
321 IWL_ERR(trans, " %34s: 0X%08x\n",
322 get_rfh_string(rfh_tbl[i]),
323 iwl_read_prph(trans, rfh_tbl[i]));
324
325 for (i = 0; i < ARRAY_SIZE(rfh_mq_tbl); i++)
326 for (q = 0; q < num_q; q++) {
327 u32 addr = rfh_mq_tbl[i].addr;
328
329 addr += q * (rfh_mq_tbl[i].is64 ? 8 : 4);
330 IWL_ERR(trans, " %34s(q %d): 0X%08x\n",
331 get_rfh_string(addr), q,
332 iwl_read_prph(trans, addr));
333 }
334
335 return 0;
336}
337
338static const char *get_fh_string(int cmd)
339{
340 switch (cmd) {
341 IWL_CMD(FH_RSCSR_CHNL0_STTS_WPTR_REG);
342 IWL_CMD(FH_RSCSR_CHNL0_RBDCB_BASE_REG);
343 IWL_CMD(FH_RSCSR_CHNL0_WPTR);
344 IWL_CMD(FH_MEM_RCSR_CHNL0_CONFIG_REG);
345 IWL_CMD(FH_MEM_RSSR_SHARED_CTRL_REG);
346 IWL_CMD(FH_MEM_RSSR_RX_STATUS_REG);
347 IWL_CMD(FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV);
348 IWL_CMD(FH_TSSR_TX_STATUS_REG);
349 IWL_CMD(FH_TSSR_TX_ERROR_REG);
350 default:
351 return "UNKNOWN";
352 }
353#undef IWL_CMD
354}
355
356int iwl_dump_fh(struct iwl_trans *trans, char **buf)
357{
358 int i;
359 static const u32 fh_tbl[] = {
360 FH_RSCSR_CHNL0_STTS_WPTR_REG,
361 FH_RSCSR_CHNL0_RBDCB_BASE_REG,
362 FH_RSCSR_CHNL0_WPTR,
363 FH_MEM_RCSR_CHNL0_CONFIG_REG,
364 FH_MEM_RSSR_SHARED_CTRL_REG,
365 FH_MEM_RSSR_RX_STATUS_REG,
366 FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV,
367 FH_TSSR_TX_STATUS_REG,
368 FH_TSSR_TX_ERROR_REG
369 };
370
371 if (trans->trans_cfg->mq_rx_supported)
372 return iwl_dump_rfh(trans, buf);
373
374#ifdef CONFIG_IWLWIFI_DEBUGFS
375 if (buf) {
376 int pos = 0;
377 size_t bufsz = ARRAY_SIZE(fh_tbl) * 48 + 40;
378
379 *buf = kmalloc(bufsz, GFP_KERNEL);
380 if (!*buf)
381 return -ENOMEM;
382
383 pos += scnprintf(*buf + pos, bufsz - pos,
384 "FH register values:\n");
385
386 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++)
387 pos += scnprintf(*buf + pos, bufsz - pos,
388 " %34s: 0X%08x\n",
389 get_fh_string(fh_tbl[i]),
390 iwl_read_direct32(trans, fh_tbl[i]));
391
392 return pos;
393 }
394#endif
395
396 IWL_ERR(trans, "FH register values:\n");
397 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++)
398 IWL_ERR(trans, " %34s: 0X%08x\n",
399 get_fh_string(fh_tbl[i]),
400 iwl_read_direct32(trans, fh_tbl[i]));
401
402 return 0;
403}
404
405#define IWL_HOST_MON_BLOCK_PEMON 0x00
406#define IWL_HOST_MON_BLOCK_HIPM 0x22
407
408#define IWL_HOST_MON_BLOCK_PEMON_VEC0 0x00
409#define IWL_HOST_MON_BLOCK_PEMON_VEC1 0x01
410#define IWL_HOST_MON_BLOCK_PEMON_WFPM 0x06
411
412static void iwl_dump_host_monitor_block(struct iwl_trans *trans,
413 u32 block, u32 vec, u32 iter)
414{
415 int i;
416
417 IWL_ERR(trans, "Host monitor block 0x%x vector 0x%x\n", block, vec);
418 iwl_write32(trans, CSR_MONITOR_CFG_REG, (block << 8) | vec);
419 for (i = 0; i < iter; i++)
420 IWL_ERR(trans, " value [iter %d]: 0x%08x\n",
421 i, iwl_read32(trans, CSR_MONITOR_STATUS_REG));
422}
423
424static void iwl_dump_host_monitor(struct iwl_trans *trans)
425{
426 switch (trans->trans_cfg->device_family) {
427 case IWL_DEVICE_FAMILY_22000:
428 case IWL_DEVICE_FAMILY_AX210:
429 IWL_ERR(trans, "CSR_RESET = 0x%x\n",
430 iwl_read32(trans, CSR_RESET));
431 iwl_dump_host_monitor_block(trans, IWL_HOST_MON_BLOCK_PEMON,
432 IWL_HOST_MON_BLOCK_PEMON_VEC0, 15);
433 iwl_dump_host_monitor_block(trans, IWL_HOST_MON_BLOCK_PEMON,
434 IWL_HOST_MON_BLOCK_PEMON_VEC1, 15);
435 iwl_dump_host_monitor_block(trans, IWL_HOST_MON_BLOCK_PEMON,
436 IWL_HOST_MON_BLOCK_PEMON_WFPM, 15);
437 iwl_dump_host_monitor_block(trans, IWL_HOST_MON_BLOCK_HIPM,
438 IWL_HOST_MON_BLOCK_PEMON_VEC0, 1);
439 break;
440 default:
441 /* not supported yet */
442 return;
443 }
444}
445
446int iwl_finish_nic_init(struct iwl_trans *trans)
447{
448 const struct iwl_cfg_trans_params *cfg_trans = trans->trans_cfg;
449 u32 poll_ready;
450 int err;
451
452 if (cfg_trans->bisr_workaround) {
453 /* ensure the TOP FSM isn't still in previous reset */
454 mdelay(2);
455 }
456
457 /*
458 * Set "initialization complete" bit to move adapter from
459 * D0U* --> D0A* (powered-up active) state.
460 */
461 if (cfg_trans->device_family >= IWL_DEVICE_FAMILY_BZ) {
462 iwl_set_bit(trans, CSR_GP_CNTRL,
463 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY |
464 CSR_GP_CNTRL_REG_FLAG_MAC_INIT);
465 poll_ready = CSR_GP_CNTRL_REG_FLAG_MAC_STATUS;
466 } else {
467 iwl_set_bit(trans, CSR_GP_CNTRL,
468 CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
469 poll_ready = CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY;
470 }
471
472 if (cfg_trans->device_family == IWL_DEVICE_FAMILY_8000)
473 udelay(2);
474
475 /*
476 * Wait for clock stabilization; once stabilized, access to
477 * device-internal resources is supported, e.g. iwl_write_prph()
478 * and accesses to uCode SRAM.
479 */
480 err = iwl_poll_bit(trans, CSR_GP_CNTRL, poll_ready, poll_ready, 25000);
481 if (err < 0) {
482 IWL_DEBUG_INFO(trans, "Failed to wake NIC\n");
483
484 iwl_dump_host_monitor(trans);
485 }
486
487 if (cfg_trans->bisr_workaround) {
488 /* ensure BISR shift has finished */
489 udelay(200);
490 }
491
492 return err < 0 ? err : 0;
493}
494IWL_EXPORT_SYMBOL(iwl_finish_nic_init);
495
496void iwl_trans_sync_nmi_with_addr(struct iwl_trans *trans, u32 inta_addr,
497 u32 sw_err_bit)
498{
499 unsigned long timeout = jiffies + IWL_TRANS_NMI_TIMEOUT;
500 bool interrupts_enabled = test_bit(STATUS_INT_ENABLED, &trans->status);
501
502 /* if the interrupts were already disabled, there is no point in
503 * calling iwl_disable_interrupts
504 */
505 if (interrupts_enabled)
506 iwl_trans_interrupts(trans, false);
507
508 iwl_force_nmi(trans);
509 while (time_after(timeout, jiffies)) {
510 u32 inta_hw = iwl_read32(trans, inta_addr);
511
512 /* Error detected by uCode */
513 if (inta_hw & sw_err_bit) {
514 /* Clear causes register */
515 iwl_write32(trans, inta_addr, inta_hw & sw_err_bit);
516 break;
517 }
518
519 mdelay(1);
520 }
521
522 /* enable interrupts only if there were already enabled before this
523 * function to avoid a case were the driver enable interrupts before
524 * proper configurations were made
525 */
526 if (interrupts_enabled)
527 iwl_trans_interrupts(trans, true);
528
529 iwl_trans_fw_error(trans, false);
530}
1/******************************************************************************
2 *
3 * Copyright(c) 2003 - 2014 Intel Corporation. All rights reserved.
4 * Copyright(c) 2015 - 2016 Intel Deutschland GmbH
5 *
6 * Portions of this file are derived from the ipw3945 project.
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of version 2 of the GNU General Public License as
10 * published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * more details.
16 *
17 * You should have received a copy of the GNU General Public License along with
18 * this program; if not, write to the Free Software Foundation, Inc.,
19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
20 *
21 * The full GNU General Public License is included in this distribution in the
22 * file called LICENSE.
23 *
24 * Contact Information:
25 * Intel Linux Wireless <linuxwifi@intel.com>
26 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27 *
28 *****************************************************************************/
29#include <linux/delay.h>
30#include <linux/device.h>
31#include <linux/export.h>
32
33#include "iwl-drv.h"
34#include "iwl-io.h"
35#include "iwl-csr.h"
36#include "iwl-debug.h"
37#include "iwl-prph.h"
38#include "iwl-fh.h"
39
40void iwl_write8(struct iwl_trans *trans, u32 ofs, u8 val)
41{
42 trace_iwlwifi_dev_iowrite8(trans->dev, ofs, val);
43 iwl_trans_write8(trans, ofs, val);
44}
45IWL_EXPORT_SYMBOL(iwl_write8);
46
47void iwl_write32(struct iwl_trans *trans, u32 ofs, u32 val)
48{
49 trace_iwlwifi_dev_iowrite32(trans->dev, ofs, val);
50 iwl_trans_write32(trans, ofs, val);
51}
52IWL_EXPORT_SYMBOL(iwl_write32);
53
54void iwl_write64(struct iwl_trans *trans, u64 ofs, u64 val)
55{
56 trace_iwlwifi_dev_iowrite64(trans->dev, ofs, val);
57 iwl_trans_write32(trans, ofs, lower_32_bits(val));
58 iwl_trans_write32(trans, ofs + 4, upper_32_bits(val));
59}
60IWL_EXPORT_SYMBOL(iwl_write64);
61
62u32 iwl_read32(struct iwl_trans *trans, u32 ofs)
63{
64 u32 val = iwl_trans_read32(trans, ofs);
65
66 trace_iwlwifi_dev_ioread32(trans->dev, ofs, val);
67 return val;
68}
69IWL_EXPORT_SYMBOL(iwl_read32);
70
71#define IWL_POLL_INTERVAL 10 /* microseconds */
72
73int iwl_poll_bit(struct iwl_trans *trans, u32 addr,
74 u32 bits, u32 mask, int timeout)
75{
76 int t = 0;
77
78 do {
79 if ((iwl_read32(trans, addr) & mask) == (bits & mask))
80 return t;
81 udelay(IWL_POLL_INTERVAL);
82 t += IWL_POLL_INTERVAL;
83 } while (t < timeout);
84
85 return -ETIMEDOUT;
86}
87IWL_EXPORT_SYMBOL(iwl_poll_bit);
88
89u32 iwl_read_direct32(struct iwl_trans *trans, u32 reg)
90{
91 u32 value = 0x5a5a5a5a;
92 unsigned long flags;
93 if (iwl_trans_grab_nic_access(trans, &flags)) {
94 value = iwl_read32(trans, reg);
95 iwl_trans_release_nic_access(trans, &flags);
96 }
97
98 return value;
99}
100IWL_EXPORT_SYMBOL(iwl_read_direct32);
101
102void iwl_write_direct32(struct iwl_trans *trans, u32 reg, u32 value)
103{
104 unsigned long flags;
105
106 if (iwl_trans_grab_nic_access(trans, &flags)) {
107 iwl_write32(trans, reg, value);
108 iwl_trans_release_nic_access(trans, &flags);
109 }
110}
111IWL_EXPORT_SYMBOL(iwl_write_direct32);
112
113void iwl_write_direct64(struct iwl_trans *trans, u64 reg, u64 value)
114{
115 unsigned long flags;
116
117 if (iwl_trans_grab_nic_access(trans, &flags)) {
118 iwl_write64(trans, reg, value);
119 iwl_trans_release_nic_access(trans, &flags);
120 }
121}
122IWL_EXPORT_SYMBOL(iwl_write_direct64);
123
124int iwl_poll_direct_bit(struct iwl_trans *trans, u32 addr, u32 mask,
125 int timeout)
126{
127 int t = 0;
128
129 do {
130 if ((iwl_read_direct32(trans, addr) & mask) == mask)
131 return t;
132 udelay(IWL_POLL_INTERVAL);
133 t += IWL_POLL_INTERVAL;
134 } while (t < timeout);
135
136 return -ETIMEDOUT;
137}
138IWL_EXPORT_SYMBOL(iwl_poll_direct_bit);
139
140u32 iwl_read_prph_no_grab(struct iwl_trans *trans, u32 ofs)
141{
142 u32 val = iwl_trans_read_prph(trans, ofs);
143 trace_iwlwifi_dev_ioread_prph32(trans->dev, ofs, val);
144 return val;
145}
146IWL_EXPORT_SYMBOL(iwl_read_prph_no_grab);
147
148void iwl_write_prph_no_grab(struct iwl_trans *trans, u32 ofs, u32 val)
149{
150 trace_iwlwifi_dev_iowrite_prph32(trans->dev, ofs, val);
151 iwl_trans_write_prph(trans, ofs, val);
152}
153IWL_EXPORT_SYMBOL(iwl_write_prph_no_grab);
154
155void iwl_write_prph64_no_grab(struct iwl_trans *trans, u64 ofs, u64 val)
156{
157 trace_iwlwifi_dev_iowrite_prph64(trans->dev, ofs, val);
158 iwl_write_prph_no_grab(trans, ofs, val & 0xffffffff);
159 iwl_write_prph_no_grab(trans, ofs + 4, val >> 32);
160}
161IWL_EXPORT_SYMBOL(iwl_write_prph64_no_grab);
162
163u32 iwl_read_prph(struct iwl_trans *trans, u32 ofs)
164{
165 unsigned long flags;
166 u32 val = 0x5a5a5a5a;
167
168 if (iwl_trans_grab_nic_access(trans, &flags)) {
169 val = iwl_read_prph_no_grab(trans, ofs);
170 iwl_trans_release_nic_access(trans, &flags);
171 }
172 return val;
173}
174IWL_EXPORT_SYMBOL(iwl_read_prph);
175
176void iwl_write_prph(struct iwl_trans *trans, u32 ofs, u32 val)
177{
178 unsigned long flags;
179
180 if (iwl_trans_grab_nic_access(trans, &flags)) {
181 iwl_write_prph_no_grab(trans, ofs, val);
182 iwl_trans_release_nic_access(trans, &flags);
183 }
184}
185IWL_EXPORT_SYMBOL(iwl_write_prph);
186
187int iwl_poll_prph_bit(struct iwl_trans *trans, u32 addr,
188 u32 bits, u32 mask, int timeout)
189{
190 int t = 0;
191
192 do {
193 if ((iwl_read_prph(trans, addr) & mask) == (bits & mask))
194 return t;
195 udelay(IWL_POLL_INTERVAL);
196 t += IWL_POLL_INTERVAL;
197 } while (t < timeout);
198
199 return -ETIMEDOUT;
200}
201
202void iwl_set_bits_prph(struct iwl_trans *trans, u32 ofs, u32 mask)
203{
204 unsigned long flags;
205
206 if (iwl_trans_grab_nic_access(trans, &flags)) {
207 iwl_write_prph_no_grab(trans, ofs,
208 iwl_read_prph_no_grab(trans, ofs) |
209 mask);
210 iwl_trans_release_nic_access(trans, &flags);
211 }
212}
213IWL_EXPORT_SYMBOL(iwl_set_bits_prph);
214
215void iwl_set_bits_mask_prph(struct iwl_trans *trans, u32 ofs,
216 u32 bits, u32 mask)
217{
218 unsigned long flags;
219
220 if (iwl_trans_grab_nic_access(trans, &flags)) {
221 iwl_write_prph_no_grab(trans, ofs,
222 (iwl_read_prph_no_grab(trans, ofs) &
223 mask) | bits);
224 iwl_trans_release_nic_access(trans, &flags);
225 }
226}
227IWL_EXPORT_SYMBOL(iwl_set_bits_mask_prph);
228
229void iwl_clear_bits_prph(struct iwl_trans *trans, u32 ofs, u32 mask)
230{
231 unsigned long flags;
232 u32 val;
233
234 if (iwl_trans_grab_nic_access(trans, &flags)) {
235 val = iwl_read_prph_no_grab(trans, ofs);
236 iwl_write_prph_no_grab(trans, ofs, (val & ~mask));
237 iwl_trans_release_nic_access(trans, &flags);
238 }
239}
240IWL_EXPORT_SYMBOL(iwl_clear_bits_prph);
241
242void iwl_force_nmi(struct iwl_trans *trans)
243{
244 if (trans->cfg->device_family < IWL_DEVICE_FAMILY_9000)
245 iwl_write_prph(trans, DEVICE_SET_NMI_REG,
246 DEVICE_SET_NMI_VAL_DRV);
247 else
248 iwl_write_prph(trans, UREG_NIC_SET_NMI_DRIVER,
249 UREG_NIC_SET_NMI_DRIVER_NMI_FROM_DRIVER_MSK);
250}
251IWL_EXPORT_SYMBOL(iwl_force_nmi);
252
253static const char *get_rfh_string(int cmd)
254{
255#define IWL_CMD(x) case x: return #x
256#define IWL_CMD_MQ(arg, reg, q) { if (arg == reg(q)) return #reg; }
257
258 int i;
259
260 for (i = 0; i < IWL_MAX_RX_HW_QUEUES; i++) {
261 IWL_CMD_MQ(cmd, RFH_Q_FRBDCB_BA_LSB, i);
262 IWL_CMD_MQ(cmd, RFH_Q_FRBDCB_WIDX, i);
263 IWL_CMD_MQ(cmd, RFH_Q_FRBDCB_RIDX, i);
264 IWL_CMD_MQ(cmd, RFH_Q_URBD_STTS_WPTR_LSB, i);
265 }
266
267 switch (cmd) {
268 IWL_CMD(RFH_RXF_DMA_CFG);
269 IWL_CMD(RFH_GEN_CFG);
270 IWL_CMD(RFH_GEN_STATUS);
271 IWL_CMD(FH_TSSR_TX_STATUS_REG);
272 IWL_CMD(FH_TSSR_TX_ERROR_REG);
273 default:
274 return "UNKNOWN";
275 }
276#undef IWL_CMD_MQ
277}
278
279struct reg {
280 u32 addr;
281 bool is64;
282};
283
284static int iwl_dump_rfh(struct iwl_trans *trans, char **buf)
285{
286 int i, q;
287 int num_q = trans->num_rx_queues;
288 static const u32 rfh_tbl[] = {
289 RFH_RXF_DMA_CFG,
290 RFH_GEN_CFG,
291 RFH_GEN_STATUS,
292 FH_TSSR_TX_STATUS_REG,
293 FH_TSSR_TX_ERROR_REG,
294 };
295 static const struct reg rfh_mq_tbl[] = {
296 { RFH_Q0_FRBDCB_BA_LSB, true },
297 { RFH_Q0_FRBDCB_WIDX, false },
298 { RFH_Q0_FRBDCB_RIDX, false },
299 { RFH_Q0_URBD_STTS_WPTR_LSB, true },
300 };
301
302#ifdef CONFIG_IWLWIFI_DEBUGFS
303 if (buf) {
304 int pos = 0;
305 /*
306 * Register (up to 34 for name + 8 blank/q for MQ): 40 chars
307 * Colon + space: 2 characters
308 * 0X%08x: 10 characters
309 * New line: 1 character
310 * Total of 53 characters
311 */
312 size_t bufsz = ARRAY_SIZE(rfh_tbl) * 53 +
313 ARRAY_SIZE(rfh_mq_tbl) * 53 * num_q + 40;
314
315 *buf = kmalloc(bufsz, GFP_KERNEL);
316 if (!*buf)
317 return -ENOMEM;
318
319 pos += scnprintf(*buf + pos, bufsz - pos,
320 "RFH register values:\n");
321
322 for (i = 0; i < ARRAY_SIZE(rfh_tbl); i++)
323 pos += scnprintf(*buf + pos, bufsz - pos,
324 "%40s: 0X%08x\n",
325 get_rfh_string(rfh_tbl[i]),
326 iwl_read_prph(trans, rfh_tbl[i]));
327
328 for (i = 0; i < ARRAY_SIZE(rfh_mq_tbl); i++)
329 for (q = 0; q < num_q; q++) {
330 u32 addr = rfh_mq_tbl[i].addr;
331
332 addr += q * (rfh_mq_tbl[i].is64 ? 8 : 4);
333 pos += scnprintf(*buf + pos, bufsz - pos,
334 "%34s(q %2d): 0X%08x\n",
335 get_rfh_string(addr), q,
336 iwl_read_prph(trans, addr));
337 }
338
339 return pos;
340 }
341#endif
342
343 IWL_ERR(trans, "RFH register values:\n");
344 for (i = 0; i < ARRAY_SIZE(rfh_tbl); i++)
345 IWL_ERR(trans, " %34s: 0X%08x\n",
346 get_rfh_string(rfh_tbl[i]),
347 iwl_read_prph(trans, rfh_tbl[i]));
348
349 for (i = 0; i < ARRAY_SIZE(rfh_mq_tbl); i++)
350 for (q = 0; q < num_q; q++) {
351 u32 addr = rfh_mq_tbl[i].addr;
352
353 addr += q * (rfh_mq_tbl[i].is64 ? 8 : 4);
354 IWL_ERR(trans, " %34s(q %d): 0X%08x\n",
355 get_rfh_string(addr), q,
356 iwl_read_prph(trans, addr));
357 }
358
359 return 0;
360}
361
362static const char *get_fh_string(int cmd)
363{
364 switch (cmd) {
365 IWL_CMD(FH_RSCSR_CHNL0_STTS_WPTR_REG);
366 IWL_CMD(FH_RSCSR_CHNL0_RBDCB_BASE_REG);
367 IWL_CMD(FH_RSCSR_CHNL0_WPTR);
368 IWL_CMD(FH_MEM_RCSR_CHNL0_CONFIG_REG);
369 IWL_CMD(FH_MEM_RSSR_SHARED_CTRL_REG);
370 IWL_CMD(FH_MEM_RSSR_RX_STATUS_REG);
371 IWL_CMD(FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV);
372 IWL_CMD(FH_TSSR_TX_STATUS_REG);
373 IWL_CMD(FH_TSSR_TX_ERROR_REG);
374 default:
375 return "UNKNOWN";
376 }
377#undef IWL_CMD
378}
379
380int iwl_dump_fh(struct iwl_trans *trans, char **buf)
381{
382 int i;
383 static const u32 fh_tbl[] = {
384 FH_RSCSR_CHNL0_STTS_WPTR_REG,
385 FH_RSCSR_CHNL0_RBDCB_BASE_REG,
386 FH_RSCSR_CHNL0_WPTR,
387 FH_MEM_RCSR_CHNL0_CONFIG_REG,
388 FH_MEM_RSSR_SHARED_CTRL_REG,
389 FH_MEM_RSSR_RX_STATUS_REG,
390 FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV,
391 FH_TSSR_TX_STATUS_REG,
392 FH_TSSR_TX_ERROR_REG
393 };
394
395 if (trans->cfg->mq_rx_supported)
396 return iwl_dump_rfh(trans, buf);
397
398#ifdef CONFIG_IWLWIFI_DEBUGFS
399 if (buf) {
400 int pos = 0;
401 size_t bufsz = ARRAY_SIZE(fh_tbl) * 48 + 40;
402
403 *buf = kmalloc(bufsz, GFP_KERNEL);
404 if (!*buf)
405 return -ENOMEM;
406
407 pos += scnprintf(*buf + pos, bufsz - pos,
408 "FH register values:\n");
409
410 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++)
411 pos += scnprintf(*buf + pos, bufsz - pos,
412 " %34s: 0X%08x\n",
413 get_fh_string(fh_tbl[i]),
414 iwl_read_direct32(trans, fh_tbl[i]));
415
416 return pos;
417 }
418#endif
419
420 IWL_ERR(trans, "FH register values:\n");
421 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++)
422 IWL_ERR(trans, " %34s: 0X%08x\n",
423 get_fh_string(fh_tbl[i]),
424 iwl_read_direct32(trans, fh_tbl[i]));
425
426 return 0;
427}