drivers/net/wireless/intel/iwlwifi/fw/dbg.c

   1 /******************************************************************************
   2  *
   3  * This file is provided under a dual BSD/GPLv2 license.  When using or
   4  * redistributing this file, you may do so under either license.
   5  *
   6  * GPL LICENSE SUMMARY
   7  *
   8  * Copyright(c) 2008 - 2014 Intel Corporation. All rights reserved.
   9  * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
  10  * Copyright(c) 2015 - 2017 Intel Deutschland GmbH
  11  * Copyright(c) 2018        Intel Corporation
  12  *
  13  * This program is free software; you can redistribute it and/or modify
  14  * it under the terms of version 2 of the GNU General Public License as
  15  * published by the Free Software Foundation.
  16  *
  17  * This program is distributed in the hope that it will be useful, but
  18  * WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  20  * General Public License for more details.
  21  *
  22  * The full GNU General Public License is included in this distribution
  23  * in the file called COPYING.
  24  *
  25  * Contact Information:
  26  *  Intel Linux Wireless <linuxwifi@intel.com>
  27  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  28  *
  29  * BSD LICENSE
  30  *
  31  * Copyright(c) 2005 - 2014 Intel Corporation. All rights reserved.
  32  * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
  33  * Copyright(c) 2015 - 2017 Intel Deutschland GmbH
  34  * Copyright(c) 2018        Intel Corporation
  35  * All rights reserved.
  36  *
  37  * Redistribution and use in source and binary forms, with or without
  38  * modification, are permitted provided that the following conditions
  39  * are met:
  40  *
  41  *  * Redistributions of source code must retain the above copyright
  42  *    notice, this list of conditions and the following disclaimer.
  43  *  * Redistributions in binary form must reproduce the above copyright
  44  *    notice, this list of conditions and the following disclaimer in
  45  *    the documentation and/or other materials provided with the
  46  *    distribution.
  47  *  * Neither the name Intel Corporation nor the names of its
  48  *    contributors may be used to endorse or promote products derived
  49  *    from this software without specific prior written permission.
  50  *
  51  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  52  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  53  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  54  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  55  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  56  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  57  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  58  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  59  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  60  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  61  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  62  *
  63  *****************************************************************************/
  64 #include <linux/devcoredump.h>
  65 #include "iwl-drv.h"
  66 #include "runtime.h"
  67 #include "dbg.h"
  68 #include "debugfs.h"
  69 #include "iwl-io.h"
  70 #include "iwl-prph.h"
  71 #include "iwl-csr.h"
  72
  73 /**
  74  * struct iwl_fw_dump_ptrs - set of pointers needed for the fw-error-dump
  75  *
  76  * @fwrt_ptr: pointer to the buffer coming from fwrt
  77  * @trans_ptr: pointer to struct %iwl_trans_dump_data which contains the
  78  *      transport's data.
  79  * @trans_len: length of the valid data in trans_ptr
  80  * @fwrt_len: length of the valid data in fwrt_ptr
  81  */
  82 struct iwl_fw_dump_ptrs {
  83         struct iwl_trans_dump_data *trans_ptr;
  84         void *fwrt_ptr;
  85         u32 fwrt_len;
  86 };
  87
  88 #define RADIO_REG_MAX_READ 0x2ad
  89 static void iwl_read_radio_regs(struct iwl_fw_runtime *fwrt,
  90                                 struct iwl_fw_error_dump_data **dump_data)
  91 {
  92         u8 *pos = (void *)(*dump_data)->data;
  93         unsigned long flags;
  94         int i;
  95
  96         IWL_DEBUG_INFO(fwrt, "WRT radio registers dump\n");
  97
  98         if (!iwl_trans_grab_nic_access(fwrt->trans, &flags))
  99                 return;
 100
 101         (*dump_data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_RADIO_REG);
 102         (*dump_data)->len = cpu_to_le32(RADIO_REG_MAX_READ);
 103
 104         for (i = 0; i < RADIO_REG_MAX_READ; i++) {
 105                 u32 rd_cmd = RADIO_RSP_RD_CMD;
 106
 107                 rd_cmd |= i << RADIO_RSP_ADDR_POS;
 108                 iwl_write_prph_no_grab(fwrt->trans, RSP_RADIO_CMD, rd_cmd);
 109                 *pos = (u8)iwl_read_prph_no_grab(fwrt->trans, RSP_RADIO_RDDAT);
 110
 111                 pos++;
 112         }
 113
 114         *dump_data = iwl_fw_error_next_data(*dump_data);
 115
 116         iwl_trans_release_nic_access(fwrt->trans, &flags);
 117 }
 118
 119 static void iwl_fwrt_dump_rxf(struct iwl_fw_runtime *fwrt,
 120                               struct iwl_fw_error_dump_data **dump_data,
 121                               int size, u32 offset, int fifo_num)
 122 {
 123         struct iwl_fw_error_dump_fifo *fifo_hdr;
 124         u32 *fifo_data;
 125         u32 fifo_len;
 126         int i;
 127
 128         fifo_hdr = (void *)(*dump_data)->data;
 129         fifo_data = (void *)fifo_hdr->data;
 130         fifo_len = size;
 131
 132         /* No need to try to read the data if the length is 0 */
 133         if (fifo_len == 0)
 134                 return;
 135
 136         /* Add a TLV for the RXF */
 137         (*dump_data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_RXF);
 138         (*dump_data)->len = cpu_to_le32(fifo_len + sizeof(*fifo_hdr));
 139
 140         fifo_hdr->fifo_num = cpu_to_le32(fifo_num);
 141         fifo_hdr->available_bytes =
 142                 cpu_to_le32(iwl_trans_read_prph(fwrt->trans,
 143                                                 RXF_RD_D_SPACE + offset));
 144         fifo_hdr->wr_ptr =
 145                 cpu_to_le32(iwl_trans_read_prph(fwrt->trans,
 146                                                 RXF_RD_WR_PTR + offset));
 147         fifo_hdr->rd_ptr =
 148                 cpu_to_le32(iwl_trans_read_prph(fwrt->trans,
 149                                                 RXF_RD_RD_PTR + offset));
 150         fifo_hdr->fence_ptr =
 151                 cpu_to_le32(iwl_trans_read_prph(fwrt->trans,
 152                                                 RXF_RD_FENCE_PTR + offset));
 153         fifo_hdr->fence_mode =
 154                 cpu_to_le32(iwl_trans_read_prph(fwrt->trans,
 155                                                 RXF_SET_FENCE_MODE + offset));
 156
 157         /* Lock fence */
 158         iwl_trans_write_prph(fwrt->trans, RXF_SET_FENCE_MODE + offset, 0x1);
 159         /* Set fence pointer to the same place like WR pointer */
 160         iwl_trans_write_prph(fwrt->trans, RXF_LD_WR2FENCE + offset, 0x1);
 161         /* Set fence offset */
 162         iwl_trans_write_prph(fwrt->trans,
 163                              RXF_LD_FENCE_OFFSET_ADDR + offset, 0x0);
 164
 165         /* Read FIFO */
 166         fifo_len /= sizeof(u32); /* Size in DWORDS */
 167         for (i = 0; i < fifo_len; i++)
 168                 fifo_data[i] = iwl_trans_read_prph(fwrt->trans,
 169                                                  RXF_FIFO_RD_FENCE_INC +
 170                                                  offset);
 171         *dump_data = iwl_fw_error_next_data(*dump_data);
 172 }
 173
 174 static void iwl_fwrt_dump_txf(struct iwl_fw_runtime *fwrt,
 175                               struct iwl_fw_error_dump_data **dump_data,
 176                               int size, u32 offset, int fifo_num)
 177 {
 178         struct iwl_fw_error_dump_fifo *fifo_hdr;
 179         u32 *fifo_data;
 180         u32 fifo_len;
 181         int i;
 182
 183         fifo_hdr = (void *)(*dump_data)->data;
 184         fifo_data = (void *)fifo_hdr->data;
 185         fifo_len = size;
 186
 187         /* No need to try to read the data if the length is 0 */
 188         if (fifo_len == 0)
 189                 return;
 190
 191         /* Add a TLV for the FIFO */
 192         (*dump_data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_TXF);
 193         (*dump_data)->len = cpu_to_le32(fifo_len + sizeof(*fifo_hdr));
 194
 195         fifo_hdr->fifo_num = cpu_to_le32(fifo_num);
 196         fifo_hdr->available_bytes =
 197                 cpu_to_le32(iwl_trans_read_prph(fwrt->trans,
 198                                                 TXF_FIFO_ITEM_CNT + offset));
 199         fifo_hdr->wr_ptr =
 200                 cpu_to_le32(iwl_trans_read_prph(fwrt->trans,
 201                                                 TXF_WR_PTR + offset));
 202         fifo_hdr->rd_ptr =
 203                 cpu_to_le32(iwl_trans_read_prph(fwrt->trans,
 204                                                 TXF_RD_PTR + offset));
 205         fifo_hdr->fence_ptr =
 206                 cpu_to_le32(iwl_trans_read_prph(fwrt->trans,
 207                                                 TXF_FENCE_PTR + offset));
 208         fifo_hdr->fence_mode =
 209                 cpu_to_le32(iwl_trans_read_prph(fwrt->trans,
 210                                                 TXF_LOCK_FENCE + offset));
 211
 212         /* Set the TXF_READ_MODIFY_ADDR to TXF_WR_PTR */
 213         iwl_trans_write_prph(fwrt->trans, TXF_READ_MODIFY_ADDR + offset,
 214                              TXF_WR_PTR + offset);
 215
 216         /* Dummy-read to advance the read pointer to the head */
 217         iwl_trans_read_prph(fwrt->trans, TXF_READ_MODIFY_DATA + offset);
 218
 219         /* Read FIFO */
 220         fifo_len /= sizeof(u32); /* Size in DWORDS */
 221         for (i = 0; i < fifo_len; i++)
 222                 fifo_data[i] = iwl_trans_read_prph(fwrt->trans,
 223                                                   TXF_READ_MODIFY_DATA +
 224                                                   offset);
 225         *dump_data = iwl_fw_error_next_data(*dump_data);
 226 }
 227
 228 static void iwl_fw_dump_fifos(struct iwl_fw_runtime *fwrt,
 229                               struct iwl_fw_error_dump_data **dump_data)
 230 {
 231         struct iwl_fw_error_dump_fifo *fifo_hdr;
 232         struct iwl_fwrt_shared_mem_cfg *cfg = &fwrt->smem_cfg;
 233         u32 *fifo_data;
 234         u32 fifo_len;
 235         unsigned long flags;
 236         int i, j;
 237
 238         IWL_DEBUG_INFO(fwrt, "WRT FIFO dump\n");
 239
 240         if (!iwl_trans_grab_nic_access(fwrt->trans, &flags))
 241                 return;
 242
 243         if (fwrt->fw->dbg.dump_mask & BIT(IWL_FW_ERROR_DUMP_RXF)) {
 244                 /* Pull RXF1 */
 245                 iwl_fwrt_dump_rxf(fwrt, dump_data,
 246                                   cfg->lmac[0].rxfifo1_size, 0, 0);
 247                 /* Pull RXF2 */
 248                 iwl_fwrt_dump_rxf(fwrt, dump_data, cfg->rxfifo2_size,
 249                                   RXF_DIFF_FROM_PREV, 1);
 250                 /* Pull LMAC2 RXF1 */
 251                 if (fwrt->smem_cfg.num_lmacs > 1)
 252                         iwl_fwrt_dump_rxf(fwrt, dump_data,
 253                                           cfg->lmac[1].rxfifo1_size,
 254                                           LMAC2_PRPH_OFFSET, 2);
 255         }
 256
 257         if (fwrt->fw->dbg.dump_mask & BIT(IWL_FW_ERROR_DUMP_TXF)) {
 258                 /* Pull TXF data from LMAC1 */
 259                 for (i = 0; i < fwrt->smem_cfg.num_txfifo_entries; i++) {
 260                         /* Mark the number of TXF we're pulling now */
 261                         iwl_trans_write_prph(fwrt->trans, TXF_LARC_NUM, i);
 262                         iwl_fwrt_dump_txf(fwrt, dump_data,
 263                                           cfg->lmac[0].txfifo_size[i], 0, i);
 264                 }
 265
 266                 /* Pull TXF data from LMAC2 */
 267                 if (fwrt->smem_cfg.num_lmacs > 1) {
 268                         for (i = 0; i < fwrt->smem_cfg.num_txfifo_entries;
 269                              i++) {
 270                                 /* Mark the number of TXF we're pulling now */
 271                                 iwl_trans_write_prph(fwrt->trans,
 272                                                      TXF_LARC_NUM +
 273                                                      LMAC2_PRPH_OFFSET, i);
 274                                 iwl_fwrt_dump_txf(fwrt, dump_data,
 275                                                   cfg->lmac[1].txfifo_size[i],
 276                                                   LMAC2_PRPH_OFFSET,
 277                                                   i + cfg->num_txfifo_entries);
 278                         }
 279                 }
 280         }
 281
 282         if (fwrt->fw->dbg.dump_mask & BIT(IWL_FW_ERROR_DUMP_INTERNAL_TXF) &&
 283             fw_has_capa(&fwrt->fw->ucode_capa,
 284                         IWL_UCODE_TLV_CAPA_EXTEND_SHARED_MEM_CFG)) {
 285                 /* Pull UMAC internal TXF data from all TXFs */
 286                 for (i = 0;
 287                      i < ARRAY_SIZE(fwrt->smem_cfg.internal_txfifo_size);
 288                      i++) {
 289                         fifo_hdr = (void *)(*dump_data)->data;
 290                         fifo_data = (void *)fifo_hdr->data;
 291                         fifo_len = fwrt->smem_cfg.internal_txfifo_size[i];
 292
 293                         /* No need to try to read the data if the length is 0 */
 294                         if (fifo_len == 0)
 295                                 continue;
 296
 297                         /* Add a TLV for the internal FIFOs */
 298                         (*dump_data)->type =
 299                                 cpu_to_le32(IWL_FW_ERROR_DUMP_INTERNAL_TXF);
 300                         (*dump_data)->len =
 301                                 cpu_to_le32(fifo_len + sizeof(*fifo_hdr));
 302
 303                         fifo_hdr->fifo_num = cpu_to_le32(i);
 304
 305                         /* Mark the number of TXF we're pulling now */
 306                         iwl_trans_write_prph(fwrt->trans, TXF_CPU2_NUM, i +
 307                                 fwrt->smem_cfg.num_txfifo_entries);
 308
 309                         fifo_hdr->available_bytes =
 310                                 cpu_to_le32(iwl_trans_read_prph(fwrt->trans,
 311                                                                 TXF_CPU2_FIFO_ITEM_CNT));
 312                         fifo_hdr->wr_ptr =
 313                                 cpu_to_le32(iwl_trans_read_prph(fwrt->trans,
 314                                                                 TXF_CPU2_WR_PTR));
 315                         fifo_hdr->rd_ptr =
 316                                 cpu_to_le32(iwl_trans_read_prph(fwrt->trans,
 317                                                                 TXF_CPU2_RD_PTR));
 318                         fifo_hdr->fence_ptr =
 319                                 cpu_to_le32(iwl_trans_read_prph(fwrt->trans,
 320                                                                 TXF_CPU2_FENCE_PTR));
 321                         fifo_hdr->fence_mode =
 322                                 cpu_to_le32(iwl_trans_read_prph(fwrt->trans,
 323                                                                 TXF_CPU2_LOCK_FENCE));
 324
 325                         /* Set TXF_CPU2_READ_MODIFY_ADDR to TXF_CPU2_WR_PTR */
 326                         iwl_trans_write_prph(fwrt->trans,
 327                                              TXF_CPU2_READ_MODIFY_ADDR,
 328                                              TXF_CPU2_WR_PTR);
 329
 330                         /* Dummy-read to advance the read pointer to head */
 331                         iwl_trans_read_prph(fwrt->trans,
 332                                             TXF_CPU2_READ_MODIFY_DATA);
 333
 334                         /* Read FIFO */
 335                         fifo_len /= sizeof(u32); /* Size in DWORDS */
 336                         for (j = 0; j < fifo_len; j++)
 337                                 fifo_data[j] =
 338                                         iwl_trans_read_prph(fwrt->trans,
 339                                                             TXF_CPU2_READ_MODIFY_DATA);
 340                         *dump_data = iwl_fw_error_next_data(*dump_data);
 341                 }
 342         }
 343
 344         iwl_trans_release_nic_access(fwrt->trans, &flags);
 345 }
 346
 347 #define IWL8260_ICCM_OFFSET             0x44000 /* Only for B-step */
 348 #define IWL8260_ICCM_LEN                0xC000 /* Only for B-step */
 349
 350 struct iwl_prph_range {
 351         u32 start, end;
 352 };
 353
 354 static const struct iwl_prph_range iwl_prph_dump_addr_comm[] = {
 355         { .start = 0x00a00000, .end = 0x00a00000 },
 356         { .start = 0x00a0000c, .end = 0x00a00024 },
 357         { .start = 0x00a0002c, .end = 0x00a0003c },
 358         { .start = 0x00a00410, .end = 0x00a00418 },
 359         { .start = 0x00a00420, .end = 0x00a00420 },
 360         { .start = 0x00a00428, .end = 0x00a00428 },
 361         { .start = 0x00a00430, .end = 0x00a0043c },
 362         { .start = 0x00a00444, .end = 0x00a00444 },
 363         { .start = 0x00a004c0, .end = 0x00a004cc },
 364         { .start = 0x00a004d8, .end = 0x00a004d8 },
 365         { .start = 0x00a004e0, .end = 0x00a004f0 },
 366         { .start = 0x00a00840, .end = 0x00a00840 },
 367         { .start = 0x00a00850, .end = 0x00a00858 },
 368         { .start = 0x00a01004, .end = 0x00a01008 },
 369         { .start = 0x00a01010, .end = 0x00a01010 },
 370         { .start = 0x00a01018, .end = 0x00a01018 },
 371         { .start = 0x00a01024, .end = 0x00a01024 },
 372         { .start = 0x00a0102c, .end = 0x00a01034 },
 373         { .start = 0x00a0103c, .end = 0x00a01040 },
 374         { .start = 0x00a01048, .end = 0x00a01094 },
 375         { .start = 0x00a01c00, .end = 0x00a01c20 },
 376         { .start = 0x00a01c58, .end = 0x00a01c58 },
 377         { .start = 0x00a01c7c, .end = 0x00a01c7c },
 378         { .start = 0x00a01c28, .end = 0x00a01c54 },
 379         { .start = 0x00a01c5c, .end = 0x00a01c5c },
 380         { .start = 0x00a01c60, .end = 0x00a01cdc },
 381         { .start = 0x00a01ce0, .end = 0x00a01d0c },
 382         { .start = 0x00a01d18, .end = 0x00a01d20 },
 383         { .start = 0x00a01d2c, .end = 0x00a01d30 },
 384         { .start = 0x00a01d40, .end = 0x00a01d5c },
 385         { .start = 0x00a01d80, .end = 0x00a01d80 },
 386         { .start = 0x00a01d98, .end = 0x00a01d9c },
 387         { .start = 0x00a01da8, .end = 0x00a01da8 },
 388         { .start = 0x00a01db8, .end = 0x00a01df4 },
 389         { .start = 0x00a01dc0, .end = 0x00a01dfc },
 390         { .start = 0x00a01e00, .end = 0x00a01e2c },
 391         { .start = 0x00a01e40, .end = 0x00a01e60 },
 392         { .start = 0x00a01e68, .end = 0x00a01e6c },
 393         { .start = 0x00a01e74, .end = 0x00a01e74 },
 394         { .start = 0x00a01e84, .end = 0x00a01e90 },
 395         { .start = 0x00a01e9c, .end = 0x00a01ec4 },
 396         { .start = 0x00a01ed0, .end = 0x00a01ee0 },
 397         { .start = 0x00a01f00, .end = 0x00a01f1c },
 398         { .start = 0x00a01f44, .end = 0x00a01ffc },
 399         { .start = 0x00a02000, .end = 0x00a02048 },
 400         { .start = 0x00a02068, .end = 0x00a020f0 },
 401         { .start = 0x00a02100, .end = 0x00a02118 },
 402         { .start = 0x00a02140, .end = 0x00a0214c },
 403         { .start = 0x00a02168, .end = 0x00a0218c },
 404         { .start = 0x00a021c0, .end = 0x00a021c0 },
 405         { .start = 0x00a02400, .end = 0x00a02410 },
 406         { .start = 0x00a02418, .end = 0x00a02420 },
 407         { .start = 0x00a02428, .end = 0x00a0242c },
 408         { .start = 0x00a02434, .end = 0x00a02434 },
 409         { .start = 0x00a02440, .end = 0x00a02460 },
 410         { .start = 0x00a02468, .end = 0x00a024b0 },
 411         { .start = 0x00a024c8, .end = 0x00a024cc },
 412         { .start = 0x00a02500, .end = 0x00a02504 },
 413         { .start = 0x00a0250c, .end = 0x00a02510 },
 414         { .start = 0x00a02540, .end = 0x00a02554 },
 415         { .start = 0x00a02580, .end = 0x00a025f4 },
 416         { .start = 0x00a02600, .end = 0x00a0260c },
 417         { .start = 0x00a02648, .end = 0x00a02650 },
 418         { .start = 0x00a02680, .end = 0x00a02680 },
 419         { .start = 0x00a026c0, .end = 0x00a026d0 },
 420         { .start = 0x00a02700, .end = 0x00a0270c },
 421         { .start = 0x00a02804, .end = 0x00a02804 },
 422         { .start = 0x00a02818, .end = 0x00a0281c },
 423         { .start = 0x00a02c00, .end = 0x00a02db4 },
 424         { .start = 0x00a02df4, .end = 0x00a02fb0 },
 425         { .start = 0x00a03000, .end = 0x00a03014 },
 426         { .start = 0x00a0301c, .end = 0x00a0302c },
 427         { .start = 0x00a03034, .end = 0x00a03038 },
 428         { .start = 0x00a03040, .end = 0x00a03048 },
 429         { .start = 0x00a03060, .end = 0x00a03068 },
 430         { .start = 0x00a03070, .end = 0x00a03074 },
 431         { .start = 0x00a0307c, .end = 0x00a0307c },
 432         { .start = 0x00a03080, .end = 0x00a03084 },
 433         { .start = 0x00a0308c, .end = 0x00a03090 },
 434         { .start = 0x00a03098, .end = 0x00a03098 },
 435         { .start = 0x00a030a0, .end = 0x00a030a0 },
 436         { .start = 0x00a030a8, .end = 0x00a030b4 },
 437         { .start = 0x00a030bc, .end = 0x00a030bc },
 438         { .start = 0x00a030c0, .end = 0x00a0312c },
 439         { .start = 0x00a03c00, .end = 0x00a03c5c },
 440         { .start = 0x00a04400, .end = 0x00a04454 },
 441         { .start = 0x00a04460, .end = 0x00a04474 },
 442         { .start = 0x00a044c0, .end = 0x00a044ec },
 443         { .start = 0x00a04500, .end = 0x00a04504 },
 444         { .start = 0x00a04510, .end = 0x00a04538 },
 445         { .start = 0x00a04540, .end = 0x00a04548 },
 446         { .start = 0x00a04560, .end = 0x00a0457c },
 447         { .start = 0x00a04590, .end = 0x00a04598 },
 448         { .start = 0x00a045c0, .end = 0x00a045f4 },
 449 };
 450
 451 static const struct iwl_prph_range iwl_prph_dump_addr_9000[] = {
 452         { .start = 0x00a05c00, .end = 0x00a05c18 },
 453         { .start = 0x00a05400, .end = 0x00a056e8 },
 454         { .start = 0x00a08000, .end = 0x00a098bc },
 455         { .start = 0x00a02400, .end = 0x00a02758 },
 456 };
 457
 458 static void iwl_read_prph_block(struct iwl_trans *trans, u32 start,
 459                                 u32 len_bytes, __le32 *data)
 460 {
 461         u32 i;
 462
 463         for (i = 0; i < len_bytes; i += 4)
 464                 *data++ = cpu_to_le32(iwl_read_prph_no_grab(trans, start + i));
 465 }
 466
 467 static void iwl_dump_prph(struct iwl_trans *trans,
 468                           struct iwl_fw_error_dump_data **data,
 469                           const struct iwl_prph_range *iwl_prph_dump_addr,
 470                           u32 range_len)
 471 {
 472         struct iwl_fw_error_dump_prph *prph;
 473         unsigned long flags;
 474         u32 i;
 475
 476         IWL_DEBUG_INFO(trans, "WRT PRPH dump\n");
 477
 478         if (!iwl_trans_grab_nic_access(trans, &flags))
 479                 return;
 480
 481         for (i = 0; i < range_len; i++) {
 482                 /* The range includes both boundaries */
 483                 int num_bytes_in_chunk = iwl_prph_dump_addr[i].end -
 484                          iwl_prph_dump_addr[i].start + 4;
 485
 486                 (*data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_PRPH);
 487                 (*data)->len = cpu_to_le32(sizeof(*prph) +
 488                                         num_bytes_in_chunk);
 489                 prph = (void *)(*data)->data;
 490                 prph->prph_start = cpu_to_le32(iwl_prph_dump_addr[i].start);
 491
 492                 iwl_read_prph_block(trans, iwl_prph_dump_addr[i].start,
 493                                     /* our range is inclusive, hence + 4 */
 494                                     iwl_prph_dump_addr[i].end -
 495                                     iwl_prph_dump_addr[i].start + 4,
 496                                     (void *)prph->data);
 497
 498                 *data = iwl_fw_error_next_data(*data);
 499         }
 500
 501         iwl_trans_release_nic_access(trans, &flags);
 502 }
 503
 504 /*
 505  * alloc_sgtable - allocates scallerlist table in the given size,
 506  * fills it with pages and returns it
 507  * @size: the size (in bytes) of the table
 508 */
 509 static struct scatterlist *alloc_sgtable(int size)
 510 {
 511         int alloc_size, nents, i;
 512         struct page *new_page;
 513         struct scatterlist *iter;
 514         struct scatterlist *table;
 515
 516         nents = DIV_ROUND_UP(size, PAGE_SIZE);
 517         table = kcalloc(nents, sizeof(*table), GFP_KERNEL);
 518         if (!table)
 519                 return NULL;
 520         sg_init_table(table, nents);
 521         iter = table;
 522         for_each_sg(table, iter, sg_nents(table), i) {
 523                 new_page = alloc_page(GFP_KERNEL);
 524                 if (!new_page) {
 525                         /* release all previous allocated pages in the table */
 526                         iter = table;
 527                         for_each_sg(table, iter, sg_nents(table), i) {
 528                                 new_page = sg_page(iter);
 529                                 if (new_page)
 530                                         __free_page(new_page);
 531                         }
 532                         return NULL;
 533                 }
 534                 alloc_size = min_t(int, size, PAGE_SIZE);
 535                 size -= PAGE_SIZE;
 536                 sg_set_page(iter, new_page, alloc_size, 0);
 537         }
 538         return table;
 539 }
 540
 541 static int iwl_fw_get_prph_len(struct iwl_fw_runtime *fwrt)
 542 {
 543         u32 prph_len = 0;
 544         int i;
 545
 546         for (i = 0; i < ARRAY_SIZE(iwl_prph_dump_addr_comm);
 547              i++) {
 548                 /* The range includes both boundaries */
 549                 int num_bytes_in_chunk =
 550                         iwl_prph_dump_addr_comm[i].end -
 551                         iwl_prph_dump_addr_comm[i].start + 4;
 552
 553                 prph_len += sizeof(struct iwl_fw_error_dump_data) +
 554                         sizeof(struct iwl_fw_error_dump_prph) +
 555                         num_bytes_in_chunk;
 556         }
 557
 558         if (fwrt->trans->cfg->mq_rx_supported) {
 559                 for (i = 0; i <
 560                         ARRAY_SIZE(iwl_prph_dump_addr_9000); i++) {
 561                         /* The range includes both boundaries */
 562                         int num_bytes_in_chunk =
 563                                 iwl_prph_dump_addr_9000[i].end -
 564                                 iwl_prph_dump_addr_9000[i].start + 4;
 565
 566                         prph_len += sizeof(struct iwl_fw_error_dump_data) +
 567                                 sizeof(struct iwl_fw_error_dump_prph) +
 568                                 num_bytes_in_chunk;
 569                 }
 570         }
 571         return prph_len;
 572 }
 573
 574 static void iwl_fw_dump_mem(struct iwl_fw_runtime *fwrt,
 575                             struct iwl_fw_error_dump_data **dump_data,
 576                             u32 len, u32 ofs, u32 type)
 577 {
 578         struct iwl_fw_error_dump_mem *dump_mem;
 579
 580         if (!len)
 581                 return;
 582
 583         (*dump_data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM);
 584         (*dump_data)->len = cpu_to_le32(len + sizeof(*dump_mem));
 585         dump_mem = (void *)(*dump_data)->data;
 586         dump_mem->type = cpu_to_le32(type);
 587         dump_mem->offset = cpu_to_le32(ofs);
 588         iwl_trans_read_mem_bytes(fwrt->trans, ofs, dump_mem->data, len);
 589         *dump_data = iwl_fw_error_next_data(*dump_data);
 590
 591         IWL_DEBUG_INFO(fwrt, "WRT memory dump. Type=%u\n", dump_mem->type);
 592 }
 593
 594 #define ADD_LEN(len, item_len, const_len) \
 595         do {size_t item = item_len; len += (!!item) * const_len + item; } \
 596         while (0)
 597
 598 static int iwl_fw_fifo_len(struct iwl_fw_runtime *fwrt,
 599                            struct iwl_fwrt_shared_mem_cfg *mem_cfg)
 600 {
 601         size_t hdr_len = sizeof(struct iwl_fw_error_dump_data) +
 602                          sizeof(struct iwl_fw_error_dump_fifo);
 603         u32 fifo_len = 0;
 604         int i;
 605
 606         if (!(fwrt->fw->dbg.dump_mask & BIT(IWL_FW_ERROR_DUMP_RXF)))
 607                 goto dump_txf;
 608
 609         /* Count RXF2 size */
 610         ADD_LEN(fifo_len, mem_cfg->rxfifo2_size, hdr_len);
 611
 612         /* Count RXF1 sizes */
 613         for (i = 0; i < mem_cfg->num_lmacs; i++)
 614                 ADD_LEN(fifo_len, mem_cfg->lmac[i].rxfifo1_size, hdr_len);
 615
 616 dump_txf:
 617         if (!(fwrt->fw->dbg.dump_mask & BIT(IWL_FW_ERROR_DUMP_TXF)))
 618                 goto dump_internal_txf;
 619
 620         /* Count TXF sizes */
 621         for (i = 0; i < mem_cfg->num_lmacs; i++) {
 622                 int j;
 623
 624                 for (j = 0; j < mem_cfg->num_txfifo_entries; j++)
 625                         ADD_LEN(fifo_len, mem_cfg->lmac[i].txfifo_size[j],
 626                                 hdr_len);
 627         }
 628
 629 dump_internal_txf:
 630         if (!((fwrt->fw->dbg.dump_mask & BIT(IWL_FW_ERROR_DUMP_INTERNAL_TXF)) &&
 631               fw_has_capa(&fwrt->fw->ucode_capa,
 632                           IWL_UCODE_TLV_CAPA_EXTEND_SHARED_MEM_CFG)))
 633                 goto out;
 634
 635         for (i = 0; i < ARRAY_SIZE(mem_cfg->internal_txfifo_size); i++)
 636                 ADD_LEN(fifo_len, mem_cfg->internal_txfifo_size[i], hdr_len);
 637
 638 out:
 639         return fifo_len;
 640 }
 641
 642 static struct iwl_fw_error_dump_file *
 643 _iwl_fw_error_dump(struct iwl_fw_runtime *fwrt,
 644                    struct iwl_fw_dump_ptrs *fw_error_dump)
 645 {
 646         struct iwl_fw_error_dump_file *dump_file;
 647         struct iwl_fw_error_dump_data *dump_data;
 648         struct iwl_fw_error_dump_info *dump_info;
 649         struct iwl_fw_error_dump_smem_cfg *dump_smem_cfg;
 650         struct iwl_fw_error_dump_trigger_desc *dump_trig;
 651         u32 sram_len, sram_ofs;
 652         const struct iwl_fw_dbg_mem_seg_tlv *fw_mem = fwrt->fw->dbg.mem_tlv;
 653         struct iwl_fwrt_shared_mem_cfg *mem_cfg = &fwrt->smem_cfg;
 654         u32 file_len, fifo_len = 0, prph_len = 0, radio_len = 0;
 655         u32 smem_len = fwrt->fw->dbg.n_mem_tlv ? 0 : fwrt->trans->cfg->smem_len;
 656         u32 sram2_len = fwrt->fw->dbg.n_mem_tlv ?
 657                                 0 : fwrt->trans->cfg->dccm2_len;
 658         bool monitor_dump_only = false;
 659         int i;
 660
 661         if (fwrt->dump.trig &&
 662             fwrt->dump.trig->mode & IWL_FW_DBG_TRIGGER_MONITOR_ONLY)
 663                 monitor_dump_only = true;
 664
 665         /* SRAM - include stack CCM if driver knows the values for it */
 666         if (!fwrt->trans->cfg->dccm_offset || !fwrt->trans->cfg->dccm_len) {
 667                 const struct fw_img *img;
 668
 669                 img = &fwrt->fw->img[fwrt->cur_fw_img];
 670                 sram_ofs = img->sec[IWL_UCODE_SECTION_DATA].offset;
 671                 sram_len = img->sec[IWL_UCODE_SECTION_DATA].len;
 672         } else {
 673                 sram_ofs = fwrt->trans->cfg->dccm_offset;
 674                 sram_len = fwrt->trans->cfg->dccm_len;
 675         }
 676
 677         /* reading RXF/TXF sizes */
 678         if (test_bit(STATUS_FW_ERROR, &fwrt->trans->status)) {
 679                 fifo_len = iwl_fw_fifo_len(fwrt, mem_cfg);
 680
 681                 /* Make room for PRPH registers */
 682                 if (!fwrt->trans->cfg->gen2 &&
 683                     fwrt->fw->dbg.dump_mask & BIT(IWL_FW_ERROR_DUMP_PRPH))
 684                         prph_len += iwl_fw_get_prph_len(fwrt);
 685
 686                 if (fwrt->trans->cfg->device_family == IWL_DEVICE_FAMILY_7000 &&
 687                     fwrt->fw->dbg.dump_mask & BIT(IWL_FW_ERROR_DUMP_RADIO_REG))
 688                         radio_len = sizeof(*dump_data) + RADIO_REG_MAX_READ;
 689         }
 690
 691         file_len = sizeof(*dump_file) + fifo_len + prph_len + radio_len;
 692
 693         if (fwrt->fw->dbg.dump_mask & BIT(IWL_FW_ERROR_DUMP_DEV_FW_INFO))
 694                 file_len += sizeof(*dump_data) + sizeof(*dump_info);
 695         if (fwrt->fw->dbg.dump_mask & BIT(IWL_FW_ERROR_DUMP_MEM_CFG))
 696                 file_len += sizeof(*dump_data) + sizeof(*dump_smem_cfg);
 697
 698         if (fwrt->fw->dbg.dump_mask & BIT(IWL_FW_ERROR_DUMP_MEM)) {
 699                 size_t hdr_len = sizeof(*dump_data) +
 700                                  sizeof(struct iwl_fw_error_dump_mem);
 701
 702                 /* Dump SRAM only if no mem_tlvs */
 703                 if (!fwrt->fw->dbg.n_mem_tlv)
 704                         ADD_LEN(file_len, sram_len, hdr_len);
 705
 706                 /* Make room for all mem types that exist */
 707                 ADD_LEN(file_len, smem_len, hdr_len);
 708                 ADD_LEN(file_len, sram2_len, hdr_len);
 709
 710                 for (i = 0; i < fwrt->fw->dbg.n_mem_tlv; i++)
 711                         ADD_LEN(file_len, le32_to_cpu(fw_mem[i].len), hdr_len);
 712         }
 713
 714         /* Make room for fw's virtual image pages, if it exists */
 715         if (fwrt->fw->dbg.dump_mask & BIT(IWL_FW_ERROR_DUMP_PAGING) &&
 716             !fwrt->trans->cfg->gen2 &&
 717             fwrt->fw->img[fwrt->cur_fw_img].paging_mem_size &&
 718             fwrt->fw_paging_db[0].fw_paging_block)
 719                 file_len += fwrt->num_of_paging_blk *
 720                         (sizeof(*dump_data) +
 721                          sizeof(struct iwl_fw_error_dump_paging) +
 722                          PAGING_BLOCK_SIZE);
 723
 724         if (iwl_fw_dbg_is_d3_debug_enabled(fwrt) && fwrt->dump.d3_debug_data) {
 725                 file_len += sizeof(*dump_data) +
 726                         fwrt->trans->cfg->d3_debug_data_length * 2;
 727         }
 728
 729         /* If we only want a monitor dump, reset the file length */
 730         if (monitor_dump_only) {
 731                 file_len = sizeof(*dump_file) + sizeof(*dump_data) * 2 +
 732                            sizeof(*dump_info) + sizeof(*dump_smem_cfg);
 733         }
 734
 735         if (fwrt->fw->dbg.dump_mask & BIT(IWL_FW_ERROR_DUMP_ERROR_INFO) &&
 736             fwrt->dump.desc)
 737                 file_len += sizeof(*dump_data) + sizeof(*dump_trig) +
 738                             fwrt->dump.desc->len;
 739
 740         dump_file = vzalloc(file_len);
 741         if (!dump_file)
 742                 return NULL;
 743
 744         fw_error_dump->fwrt_ptr = dump_file;
 745
 746         dump_file->barker = cpu_to_le32(IWL_FW_ERROR_DUMP_BARKER);
 747         dump_data = (void *)dump_file->data;
 748
 749         if (fwrt->fw->dbg.dump_mask & BIT(IWL_FW_ERROR_DUMP_DEV_FW_INFO)) {
 750                 dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_DEV_FW_INFO);
 751                 dump_data->len = cpu_to_le32(sizeof(*dump_info));
 752                 dump_info = (void *)dump_data->data;
 753                 dump_info->device_family =
 754                         fwrt->trans->cfg->device_family ==
 755                         IWL_DEVICE_FAMILY_7000 ?
 756                                 cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_7) :
 757                                 cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_8);
 758                 dump_info->hw_step =
 759                         cpu_to_le32(CSR_HW_REV_STEP(fwrt->trans->hw_rev));
 760                 memcpy(dump_info->fw_human_readable, fwrt->fw->human_readable,
 761                        sizeof(dump_info->fw_human_readable));
 762                 strncpy(dump_info->dev_human_readable, fwrt->trans->cfg->name,
 763                         sizeof(dump_info->dev_human_readable) - 1);
 764                 strncpy(dump_info->bus_human_readable, fwrt->dev->bus->name,
 765                         sizeof(dump_info->bus_human_readable) - 1);
 766
 767                 dump_data = iwl_fw_error_next_data(dump_data);
 768         }
 769
 770         if (fwrt->fw->dbg.dump_mask & BIT(IWL_FW_ERROR_DUMP_MEM_CFG)) {
 771                 /* Dump shared memory configuration */
 772                 dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM_CFG);
 773                 dump_data->len = cpu_to_le32(sizeof(*dump_smem_cfg));
 774                 dump_smem_cfg = (void *)dump_data->data;
 775                 dump_smem_cfg->num_lmacs = cpu_to_le32(mem_cfg->num_lmacs);
 776                 dump_smem_cfg->num_txfifo_entries =
 777                         cpu_to_le32(mem_cfg->num_txfifo_entries);
 778                 for (i = 0; i < MAX_NUM_LMAC; i++) {
 779                         int j;
 780                         u32 *txf_size = mem_cfg->lmac[i].txfifo_size;
 781
 782                         for (j = 0; j < TX_FIFO_MAX_NUM; j++)
 783                                 dump_smem_cfg->lmac[i].txfifo_size[j] =
 784                                         cpu_to_le32(txf_size[j]);
 785                         dump_smem_cfg->lmac[i].rxfifo1_size =
 786                                 cpu_to_le32(mem_cfg->lmac[i].rxfifo1_size);
 787                 }
 788                 dump_smem_cfg->rxfifo2_size =
 789                         cpu_to_le32(mem_cfg->rxfifo2_size);
 790                 dump_smem_cfg->internal_txfifo_addr =
 791                         cpu_to_le32(mem_cfg->internal_txfifo_addr);
 792                 for (i = 0; i < TX_FIFO_INTERNAL_MAX_NUM; i++) {
 793                         dump_smem_cfg->internal_txfifo_size[i] =
 794                                 cpu_to_le32(mem_cfg->internal_txfifo_size[i]);
 795                 }
 796
 797                 dump_data = iwl_fw_error_next_data(dump_data);
 798         }
 799
 800         /* We only dump the FIFOs if the FW is in error state */
 801         if (fifo_len) {
 802                 iwl_fw_dump_fifos(fwrt, &dump_data);
 803                 if (radio_len)
 804                         iwl_read_radio_regs(fwrt, &dump_data);
 805         }
 806
 807         if (fwrt->fw->dbg.dump_mask & BIT(IWL_FW_ERROR_DUMP_ERROR_INFO) &&
 808             fwrt->dump.desc) {
 809                 dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_ERROR_INFO);
 810                 dump_data->len = cpu_to_le32(sizeof(*dump_trig) +
 811                                              fwrt->dump.desc->len);
 812                 dump_trig = (void *)dump_data->data;
 813                 memcpy(dump_trig, &fwrt->dump.desc->trig_desc,
 814                        sizeof(*dump_trig) + fwrt->dump.desc->len);
 815
 816                 dump_data = iwl_fw_error_next_data(dump_data);
 817         }
 818
 819         /* In case we only want monitor dump, skip to dump trasport data */
 820         if (monitor_dump_only)
 821                 goto out;
 822
 823         if (fwrt->fw->dbg.dump_mask & BIT(IWL_FW_ERROR_DUMP_MEM)) {
 824                 const struct iwl_fw_dbg_mem_seg_tlv *fw_dbg_mem =
 825                         fwrt->fw->dbg.mem_tlv;
 826
 827                 if (!fwrt->fw->dbg.n_mem_tlv)
 828                         iwl_fw_dump_mem(fwrt, &dump_data, sram_len, sram_ofs,
 829                                         IWL_FW_ERROR_DUMP_MEM_SRAM);
 830
 831                 for (i = 0; i < fwrt->fw->dbg.n_mem_tlv; i++) {
 832                         u32 len = le32_to_cpu(fw_dbg_mem[i].len);
 833                         u32 ofs = le32_to_cpu(fw_dbg_mem[i].ofs);
 834
 835                         iwl_fw_dump_mem(fwrt, &dump_data, len, ofs,
 836                                         le32_to_cpu(fw_dbg_mem[i].data_type));
 837                 }
 838
 839                 iwl_fw_dump_mem(fwrt, &dump_data, smem_len,
 840                                 fwrt->trans->cfg->smem_offset,
 841                                 IWL_FW_ERROR_DUMP_MEM_SMEM);
 842
 843                 iwl_fw_dump_mem(fwrt, &dump_data, sram2_len,
 844                                 fwrt->trans->cfg->dccm2_offset,
 845                                 IWL_FW_ERROR_DUMP_MEM_SRAM);
 846         }
 847
 848         if (iwl_fw_dbg_is_d3_debug_enabled(fwrt) && fwrt->dump.d3_debug_data) {
 849                 u32 addr = fwrt->trans->cfg->d3_debug_data_base_addr;
 850                 size_t data_size = fwrt->trans->cfg->d3_debug_data_length;
 851
 852                 dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_D3_DEBUG_DATA);
 853                 dump_data->len = cpu_to_le32(data_size * 2);
 854
 855                 memcpy(dump_data->data, fwrt->dump.d3_debug_data, data_size);
 856
 857                 kfree(fwrt->dump.d3_debug_data);
 858                 fwrt->dump.d3_debug_data = NULL;
 859
 860                 iwl_trans_read_mem_bytes(fwrt->trans, addr,
 861                                          dump_data->data + data_size,
 862                                          data_size);
 863
 864                 dump_data = iwl_fw_error_next_data(dump_data);
 865         }
 866
 867         /* Dump fw's virtual image */
 868         if (fwrt->fw->dbg.dump_mask & BIT(IWL_FW_ERROR_DUMP_PAGING) &&
 869             !fwrt->trans->cfg->gen2 &&
 870             fwrt->fw->img[fwrt->cur_fw_img].paging_mem_size &&
 871             fwrt->fw_paging_db[0].fw_paging_block) {
 872                 IWL_DEBUG_INFO(fwrt, "WRT paging dump\n");
 873                 for (i = 1; i < fwrt->num_of_paging_blk + 1; i++) {
 874                         struct iwl_fw_error_dump_paging *paging;
 875                         struct page *pages =
 876                                 fwrt->fw_paging_db[i].fw_paging_block;
 877                         dma_addr_t addr = fwrt->fw_paging_db[i].fw_paging_phys;
 878
 879                         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_PAGING);
 880                         dump_data->len = cpu_to_le32(sizeof(*paging) +
 881                                                      PAGING_BLOCK_SIZE);
 882                         paging = (void *)dump_data->data;
 883                         paging->index = cpu_to_le32(i);
 884                         dma_sync_single_for_cpu(fwrt->trans->dev, addr,
 885                                                 PAGING_BLOCK_SIZE,
 886                                                 DMA_BIDIRECTIONAL);
 887                         memcpy(paging->data, page_address(pages),
 888                                PAGING_BLOCK_SIZE);
 889                         dump_data = iwl_fw_error_next_data(dump_data);
 890                 }
 891         }
 892
 893         if (prph_len) {
 894                 iwl_dump_prph(fwrt->trans, &dump_data,
 895                               iwl_prph_dump_addr_comm,
 896                               ARRAY_SIZE(iwl_prph_dump_addr_comm));
 897
 898                 if (fwrt->trans->cfg->mq_rx_supported)
 899                         iwl_dump_prph(fwrt->trans, &dump_data,
 900                                       iwl_prph_dump_addr_9000,
 901                                       ARRAY_SIZE(iwl_prph_dump_addr_9000));
 902         }
 903
 904 out:
 905         dump_file->file_len = cpu_to_le32(file_len);
 906         return dump_file;
 907 }
 908
 909 void iwl_fw_error_dump(struct iwl_fw_runtime *fwrt)
 910 {
 911         struct iwl_fw_dump_ptrs *fw_error_dump;
 912         struct iwl_fw_error_dump_file *dump_file;
 913         struct scatterlist *sg_dump_data;
 914         u32 file_len;
 915
 916         IWL_DEBUG_INFO(fwrt, "WRT dump start\n");
 917
 918         /* there's no point in fw dump if the bus is dead */
 919         if (test_bit(STATUS_TRANS_DEAD, &fwrt->trans->status)) {
 920                 IWL_ERR(fwrt, "Skip fw error dump since bus is dead\n");
 921                 goto out;
 922         }
 923
 924         fw_error_dump = kzalloc(sizeof(*fw_error_dump), GFP_KERNEL);
 925         if (!fw_error_dump)
 926                 goto out;
 927
 928         dump_file = _iwl_fw_error_dump(fwrt, fw_error_dump);
 929         if (!dump_file) {
 930                 kfree(fw_error_dump);
 931                 goto out;
 932         }
 933
 934         fw_error_dump->trans_ptr = iwl_trans_dump_data(fwrt->trans,
 935                                                        fwrt->dump.trig);
 936         file_len = le32_to_cpu(dump_file->file_len);
 937         fw_error_dump->fwrt_len = file_len;
 938         if (fw_error_dump->trans_ptr) {
 939                 file_len += fw_error_dump->trans_ptr->len;
 940                 dump_file->file_len = cpu_to_le32(file_len);
 941         }
 942
 943         sg_dump_data = alloc_sgtable(file_len);
 944         if (sg_dump_data) {
 945                 sg_pcopy_from_buffer(sg_dump_data,
 946                                      sg_nents(sg_dump_data),
 947                                      fw_error_dump->fwrt_ptr,
 948                                      fw_error_dump->fwrt_len, 0);
 949                 if (fw_error_dump->trans_ptr)
 950                         sg_pcopy_from_buffer(sg_dump_data,
 951                                              sg_nents(sg_dump_data),
 952                                              fw_error_dump->trans_ptr->data,
 953                                              fw_error_dump->trans_ptr->len,
 954                                              fw_error_dump->fwrt_len);
 955                 dev_coredumpsg(fwrt->trans->dev, sg_dump_data, file_len,
 956                                GFP_KERNEL);
 957         }
 958         vfree(fw_error_dump->fwrt_ptr);
 959         vfree(fw_error_dump->trans_ptr);
 960         kfree(fw_error_dump);
 961
 962 out:
 963         iwl_fw_free_dump_desc(fwrt);
 964         clear_bit(IWL_FWRT_STATUS_DUMPING, &fwrt->status);
 965         IWL_DEBUG_INFO(fwrt, "WRT dump done\n");
 966 }
 967 IWL_EXPORT_SYMBOL(iwl_fw_error_dump);
 968
 969 const struct iwl_fw_dump_desc iwl_dump_desc_assert = {
 970         .trig_desc = {
 971                 .type = cpu_to_le32(FW_DBG_TRIGGER_FW_ASSERT),
 972         },
 973 };
 974 IWL_EXPORT_SYMBOL(iwl_dump_desc_assert);
 975
 976 void iwl_fw_alive_error_dump(struct iwl_fw_runtime *fwrt)
 977 {
 978         struct iwl_fw_dump_desc *iwl_dump_desc_no_alive =
 979                 kmalloc(sizeof(*iwl_dump_desc_no_alive), GFP_KERNEL);
 980
 981         if (!iwl_dump_desc_no_alive)
 982                 return;
 983
 984         iwl_dump_desc_no_alive->trig_desc.type =
 985                 cpu_to_le32(FW_DBG_TRIGGER_NO_ALIVE);
 986         iwl_dump_desc_no_alive->len = 0;
 987
 988         if (WARN_ON(fwrt->dump.desc))
 989                 iwl_fw_free_dump_desc(fwrt);
 990
 991         IWL_WARN(fwrt, "Collecting data: trigger %d fired.\n",
 992                  FW_DBG_TRIGGER_NO_ALIVE);
 993
 994         fwrt->dump.desc = iwl_dump_desc_no_alive;
 995         iwl_fw_error_dump(fwrt);
 996         clear_bit(IWL_FWRT_STATUS_WAIT_ALIVE, &fwrt->status);
 997 }
 998 IWL_EXPORT_SYMBOL(iwl_fw_alive_error_dump);
 999
1000 int iwl_fw_dbg_collect_desc(struct iwl_fw_runtime *fwrt,
1001                             const struct iwl_fw_dump_desc *desc, void *trigger,
1002                             unsigned int delay)
1003 {
1004         /*
1005          * If the loading of the FW completed successfully, the next step is to
1006          * get the SMEM config data. Thus, if fwrt->smem_cfg.num_lmacs is non
1007          * zero, the FW was already loaded successully. If the state is "NO_FW"
1008          * in such a case - exit, since FW may be dead. Otherwise, we
1009          * can try to collect the data, since FW might just not be fully
1010          * loaded (no "ALIVE" yet), and the debug data is accessible.
1011          *
1012          * Corner case: got the FW alive but crashed before getting the SMEM
1013          *      config. In such a case, due to HW access problems, we might
1014          *      collect garbage.
1015          */
1016         if (fwrt->trans->state == IWL_TRANS_NO_FW &&
1017             fwrt->smem_cfg.num_lmacs)
1018                 return -EIO;
1019
1020         if (test_and_set_bit(IWL_FWRT_STATUS_DUMPING, &fwrt->status) ||
1021             test_bit(IWL_FWRT_STATUS_WAIT_ALIVE, &fwrt->status))
1022                 return -EBUSY;
1023
1024         if (WARN_ON(fwrt->dump.desc))
1025                 iwl_fw_free_dump_desc(fwrt);
1026
1027         IWL_WARN(fwrt, "Collecting data: trigger %d fired.\n",
1028                  le32_to_cpu(desc->trig_desc.type));
1029
1030         fwrt->dump.desc = desc;
1031         fwrt->dump.trig = trigger;
1032
1033         schedule_delayed_work(&fwrt->dump.wk, delay);
1034
1035         return 0;
1036 }
1037 IWL_EXPORT_SYMBOL(iwl_fw_dbg_collect_desc);
1038
1039 int iwl_fw_dbg_collect(struct iwl_fw_runtime *fwrt,
1040                        enum iwl_fw_dbg_trigger trig,
1041                        const char *str, size_t len,
1042                        struct iwl_fw_dbg_trigger_tlv *trigger)
1043 {
1044         struct iwl_fw_dump_desc *desc;
1045         unsigned int delay = 0;
1046
1047         if (trigger) {
1048                 u16 occurrences = le16_to_cpu(trigger->occurrences) - 1;
1049
1050                 if (!le16_to_cpu(trigger->occurrences))
1051                         return 0;
1052
1053                 if (trigger->flags & IWL_FW_DBG_FORCE_RESTART) {
1054                         IWL_WARN(fwrt, "Force restart: trigger %d fired.\n",
1055                                  trig);
1056                         iwl_force_nmi(fwrt->trans);
1057                         return 0;
1058                 }
1059
1060                 trigger->occurrences = cpu_to_le16(occurrences);
1061                 delay = le16_to_cpu(trigger->trig_dis_ms);
1062         }
1063
1064         desc = kzalloc(sizeof(*desc) + len, GFP_ATOMIC);
1065         if (!desc)
1066                 return -ENOMEM;
1067
1068
1069         desc->len = len;
1070         desc->trig_desc.type = cpu_to_le32(trig);
1071         memcpy(desc->trig_desc.data, str, len);
1072
1073         return iwl_fw_dbg_collect_desc(fwrt, desc, trigger, delay);
1074 }
1075 IWL_EXPORT_SYMBOL(iwl_fw_dbg_collect);
1076
1077 int iwl_fw_dbg_collect_trig(struct iwl_fw_runtime *fwrt,
1078                             struct iwl_fw_dbg_trigger_tlv *trigger,
1079                             const char *fmt, ...)
1080 {
1081         int ret, len = 0;
1082         char buf[64];
1083
1084         if (fmt) {
1085                 va_list ap;
1086
1087                 buf[sizeof(buf) - 1] = '\0';
1088
1089                 va_start(ap, fmt);
1090                 vsnprintf(buf, sizeof(buf), fmt, ap);
1091                 va_end(ap);
1092
1093                 /* check for truncation */
1094                 if (WARN_ON_ONCE(buf[sizeof(buf) - 1]))
1095                         buf[sizeof(buf) - 1] = '\0';
1096
1097                 len = strlen(buf) + 1;
1098         }
1099
1100         ret = iwl_fw_dbg_collect(fwrt, le32_to_cpu(trigger->id), buf, len,
1101                                  trigger);
1102
1103         if (ret)
1104                 return ret;
1105
1106         return 0;
1107 }
1108 IWL_EXPORT_SYMBOL(iwl_fw_dbg_collect_trig);
1109
1110 int iwl_fw_start_dbg_conf(struct iwl_fw_runtime *fwrt, u8 conf_id)
1111 {
1112         u8 *ptr;
1113         int ret;
1114         int i;
1115
1116         if (WARN_ONCE(conf_id >= ARRAY_SIZE(fwrt->fw->dbg.conf_tlv),
1117                       "Invalid configuration %d\n", conf_id))
1118                 return -EINVAL;
1119
1120         /* EARLY START - firmware's configuration is hard coded */
1121         if ((!fwrt->fw->dbg.conf_tlv[conf_id] ||
1122              !fwrt->fw->dbg.conf_tlv[conf_id]->num_of_hcmds) &&
1123             conf_id == FW_DBG_START_FROM_ALIVE)
1124                 return 0;
1125
1126         if (!fwrt->fw->dbg.conf_tlv[conf_id])
1127                 return -EINVAL;
1128
1129         if (fwrt->dump.conf != FW_DBG_INVALID)
1130                 IWL_WARN(fwrt, "FW already configured (%d) - re-configuring\n",
1131                          fwrt->dump.conf);
1132
1133         /* Send all HCMDs for configuring the FW debug */
1134         ptr = (void *)&fwrt->fw->dbg.conf_tlv[conf_id]->hcmd;
1135         for (i = 0; i < fwrt->fw->dbg.conf_tlv[conf_id]->num_of_hcmds; i++) {
1136                 struct iwl_fw_dbg_conf_hcmd *cmd = (void *)ptr;
1137                 struct iwl_host_cmd hcmd = {
1138                         .id = cmd->id,
1139                         .len = { le16_to_cpu(cmd->len), },
1140                         .data = { cmd->data, },
1141                 };
1142
1143                 ret = iwl_trans_send_cmd(fwrt->trans, &hcmd);
1144                 if (ret)
1145                         return ret;
1146
1147                 ptr += sizeof(*cmd);
1148                 ptr += le16_to_cpu(cmd->len);
1149         }
1150
1151         fwrt->dump.conf = conf_id;
1152
1153         return 0;
1154 }
1155 IWL_EXPORT_SYMBOL(iwl_fw_start_dbg_conf);
1156
1157 /* this function assumes dump_start was called beforehand and dump_end will be
1158  * called afterwards
1159  */
1160 void iwl_fw_dbg_collect_sync(struct iwl_fw_runtime *fwrt)
1161 {
1162         struct iwl_fw_dbg_params params = {0};
1163
1164         if (!test_bit(IWL_FWRT_STATUS_DUMPING, &fwrt->status))
1165                 return;
1166
1167         if (fwrt->ops && fwrt->ops->fw_running &&
1168             !fwrt->ops->fw_running(fwrt->ops_ctx)) {
1169                 IWL_ERR(fwrt, "Firmware not running - cannot dump error\n");
1170                 iwl_fw_free_dump_desc(fwrt);
1171                 clear_bit(IWL_FWRT_STATUS_DUMPING, &fwrt->status);
1172                 return;
1173         }
1174
1175         iwl_fw_dbg_stop_recording(fwrt, &params);
1176
1177         iwl_fw_error_dump(fwrt);
1178
1179         /* start recording again if the firmware is not crashed */
1180         if (!test_bit(STATUS_FW_ERROR, &fwrt->trans->status) &&
1181             fwrt->fw->dbg.dest_tlv) {
1182                 /* wait before we collect the data till the DBGC stop */
1183                 udelay(500);
1184                 iwl_fw_dbg_restart_recording(fwrt, &params);
1185         }
1186 }
1187 IWL_EXPORT_SYMBOL(iwl_fw_dbg_collect_sync);
1188
1189 void iwl_fw_error_dump_wk(struct work_struct *work)
1190 {
1191         struct iwl_fw_runtime *fwrt =
1192                 container_of(work, struct iwl_fw_runtime, dump.wk.work);
1193
1194         if (fwrt->ops && fwrt->ops->dump_start &&
1195             fwrt->ops->dump_start(fwrt->ops_ctx))
1196                 return;
1197
1198         iwl_fw_dbg_collect_sync(fwrt);
1199
1200         if (fwrt->ops && fwrt->ops->dump_end)
1201                 fwrt->ops->dump_end(fwrt->ops_ctx);
1202 }
1203
1204 void iwl_fw_dbg_read_d3_debug_data(struct iwl_fw_runtime *fwrt)
1205 {
1206         const struct iwl_cfg *cfg = fwrt->trans->cfg;
1207
1208         if (!iwl_fw_dbg_is_d3_debug_enabled(fwrt))
1209                 return;
1210
1211         if (!fwrt->dump.d3_debug_data) {
1212                 fwrt->dump.d3_debug_data = kmalloc(cfg->d3_debug_data_length,
1213                                                    GFP_KERNEL);
1214                 if (!fwrt->dump.d3_debug_data) {
1215                         IWL_ERR(fwrt,
1216                                 "failed to allocate memory for D3 debug data\n");
1217                         return;
1218                 }
1219         }
1220
1221         /* if the buffer holds previous debug data it is overwritten */
1222         iwl_trans_read_mem_bytes(fwrt->trans, cfg->d3_debug_data_base_addr,
1223                                  fwrt->dump.d3_debug_data,
1224                                  cfg->d3_debug_data_length);
1225 }
1226 IWL_EXPORT_SYMBOL(iwl_fw_dbg_read_d3_debug_data);