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) 2003 - 2014 Intel Corporation. All rights reserved. 9 * Copyright(c) 2015 - 2016 Intel Deutschland GmbH 10 * Copyright(C) 2018 - 2019 Intel Corporation 11 * 12 * This program is free software; you can redistribute it and/or modify it 13 * under the terms of version 2 of the GNU General Public License as 14 * published by the Free Software Foundation. 15 * 16 * This program is distributed in the hope that it will be useful, but WITHOUT 17 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 18 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 19 * more details. 20 * 21 * The full GNU General Public License is included in this distribution in the 22 * file called COPYING. 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 * BSD LICENSE 29 * 30 * Copyright(c) 2003 - 2014 Intel Corporation. All rights reserved. 31 * Copyright(c) 2015 - 2016 Intel Deutschland GmbH 32 * Copyright (C) 2018 - 2019 Intel Corporation 33 * All rights reserved. 34 * 35 * Redistribution and use in source and binary forms, with or without 36 * modification, are permitted provided that the following conditions 37 * are met: 38 * 39 * * Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * * Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in 43 * the documentation and/or other materials provided with the 44 * distribution. 45 * * Neither the name Intel Corporation nor the names of its 46 * contributors may be used to endorse or promote products derived 47 * from this software without specific prior written permission. 48 * 49 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 50 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 51 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 52 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 53 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 54 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 55 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 56 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 57 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 58 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 59 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 60 * 61 *****************************************************************************/ 62 #include <linux/delay.h> 63 #include <linux/device.h> 64 #include <linux/export.h> 65 66 #include "iwl-drv.h" 67 #include "iwl-io.h" 68 #include "iwl-csr.h" 69 #include "iwl-debug.h" 70 #include "iwl-prph.h" 71 #include "iwl-fh.h" 72 73 void iwl_write8(struct iwl_trans *trans, u32 ofs, u8 val) 74 { 75 trace_iwlwifi_dev_iowrite8(trans->dev, ofs, val); 76 iwl_trans_write8(trans, ofs, val); 77 } 78 IWL_EXPORT_SYMBOL(iwl_write8); 79 80 void iwl_write32(struct iwl_trans *trans, u32 ofs, u32 val) 81 { 82 trace_iwlwifi_dev_iowrite32(trans->dev, ofs, val); 83 iwl_trans_write32(trans, ofs, val); 84 } 85 IWL_EXPORT_SYMBOL(iwl_write32); 86 87 void iwl_write64(struct iwl_trans *trans, u64 ofs, u64 val) 88 { 89 trace_iwlwifi_dev_iowrite64(trans->dev, ofs, val); 90 iwl_trans_write32(trans, ofs, lower_32_bits(val)); 91 iwl_trans_write32(trans, ofs + 4, upper_32_bits(val)); 92 } 93 IWL_EXPORT_SYMBOL(iwl_write64); 94 95 u32 iwl_read32(struct iwl_trans *trans, u32 ofs) 96 { 97 u32 val = iwl_trans_read32(trans, ofs); 98 99 trace_iwlwifi_dev_ioread32(trans->dev, ofs, val); 100 return val; 101 } 102 IWL_EXPORT_SYMBOL(iwl_read32); 103 104 #define IWL_POLL_INTERVAL 10 /* microseconds */ 105 106 int iwl_poll_bit(struct iwl_trans *trans, u32 addr, 107 u32 bits, u32 mask, int timeout) 108 { 109 int t = 0; 110 111 do { 112 if ((iwl_read32(trans, addr) & mask) == (bits & mask)) 113 return t; 114 udelay(IWL_POLL_INTERVAL); 115 t += IWL_POLL_INTERVAL; 116 } while (t < timeout); 117 118 return -ETIMEDOUT; 119 } 120 IWL_EXPORT_SYMBOL(iwl_poll_bit); 121 122 u32 iwl_read_direct32(struct iwl_trans *trans, u32 reg) 123 { 124 u32 value = 0x5a5a5a5a; 125 unsigned long flags; 126 if (iwl_trans_grab_nic_access(trans, &flags)) { 127 value = iwl_read32(trans, reg); 128 iwl_trans_release_nic_access(trans, &flags); 129 } 130 131 return value; 132 } 133 IWL_EXPORT_SYMBOL(iwl_read_direct32); 134 135 void iwl_write_direct32(struct iwl_trans *trans, u32 reg, u32 value) 136 { 137 unsigned long flags; 138 139 if (iwl_trans_grab_nic_access(trans, &flags)) { 140 iwl_write32(trans, reg, value); 141 iwl_trans_release_nic_access(trans, &flags); 142 } 143 } 144 IWL_EXPORT_SYMBOL(iwl_write_direct32); 145 146 void iwl_write_direct64(struct iwl_trans *trans, u64 reg, u64 value) 147 { 148 unsigned long flags; 149 150 if (iwl_trans_grab_nic_access(trans, &flags)) { 151 iwl_write64(trans, reg, value); 152 iwl_trans_release_nic_access(trans, &flags); 153 } 154 } 155 IWL_EXPORT_SYMBOL(iwl_write_direct64); 156 157 int iwl_poll_direct_bit(struct iwl_trans *trans, u32 addr, u32 mask, 158 int timeout) 159 { 160 int t = 0; 161 162 do { 163 if ((iwl_read_direct32(trans, addr) & mask) == mask) 164 return t; 165 udelay(IWL_POLL_INTERVAL); 166 t += IWL_POLL_INTERVAL; 167 } while (t < timeout); 168 169 return -ETIMEDOUT; 170 } 171 IWL_EXPORT_SYMBOL(iwl_poll_direct_bit); 172 173 u32 iwl_read_prph_no_grab(struct iwl_trans *trans, u32 ofs) 174 { 175 u32 val = iwl_trans_read_prph(trans, ofs); 176 trace_iwlwifi_dev_ioread_prph32(trans->dev, ofs, val); 177 return val; 178 } 179 IWL_EXPORT_SYMBOL(iwl_read_prph_no_grab); 180 181 void iwl_write_prph_no_grab(struct iwl_trans *trans, u32 ofs, u32 val) 182 { 183 trace_iwlwifi_dev_iowrite_prph32(trans->dev, ofs, val); 184 iwl_trans_write_prph(trans, ofs, val); 185 } 186 IWL_EXPORT_SYMBOL(iwl_write_prph_no_grab); 187 188 void iwl_write_prph64_no_grab(struct iwl_trans *trans, u64 ofs, u64 val) 189 { 190 trace_iwlwifi_dev_iowrite_prph64(trans->dev, ofs, val); 191 iwl_write_prph_no_grab(trans, ofs, val & 0xffffffff); 192 iwl_write_prph_no_grab(trans, ofs + 4, val >> 32); 193 } 194 IWL_EXPORT_SYMBOL(iwl_write_prph64_no_grab); 195 196 u32 iwl_read_prph(struct iwl_trans *trans, u32 ofs) 197 { 198 unsigned long flags; 199 u32 val = 0x5a5a5a5a; 200 201 if (iwl_trans_grab_nic_access(trans, &flags)) { 202 val = iwl_read_prph_no_grab(trans, ofs); 203 iwl_trans_release_nic_access(trans, &flags); 204 } 205 return val; 206 } 207 IWL_EXPORT_SYMBOL(iwl_read_prph); 208 209 void iwl_write_prph(struct iwl_trans *trans, u32 ofs, u32 val) 210 { 211 unsigned long flags; 212 213 if (iwl_trans_grab_nic_access(trans, &flags)) { 214 iwl_write_prph_no_grab(trans, ofs, val); 215 iwl_trans_release_nic_access(trans, &flags); 216 } 217 } 218 IWL_EXPORT_SYMBOL(iwl_write_prph); 219 220 int iwl_poll_prph_bit(struct iwl_trans *trans, u32 addr, 221 u32 bits, u32 mask, int timeout) 222 { 223 int t = 0; 224 225 do { 226 if ((iwl_read_prph(trans, addr) & mask) == (bits & mask)) 227 return t; 228 udelay(IWL_POLL_INTERVAL); 229 t += IWL_POLL_INTERVAL; 230 } while (t < timeout); 231 232 return -ETIMEDOUT; 233 } 234 235 void iwl_set_bits_prph(struct iwl_trans *trans, u32 ofs, u32 mask) 236 { 237 unsigned long flags; 238 239 if (iwl_trans_grab_nic_access(trans, &flags)) { 240 iwl_write_prph_no_grab(trans, ofs, 241 iwl_read_prph_no_grab(trans, ofs) | 242 mask); 243 iwl_trans_release_nic_access(trans, &flags); 244 } 245 } 246 IWL_EXPORT_SYMBOL(iwl_set_bits_prph); 247 248 void iwl_set_bits_mask_prph(struct iwl_trans *trans, u32 ofs, 249 u32 bits, u32 mask) 250 { 251 unsigned long flags; 252 253 if (iwl_trans_grab_nic_access(trans, &flags)) { 254 iwl_write_prph_no_grab(trans, ofs, 255 (iwl_read_prph_no_grab(trans, ofs) & 256 mask) | bits); 257 iwl_trans_release_nic_access(trans, &flags); 258 } 259 } 260 IWL_EXPORT_SYMBOL(iwl_set_bits_mask_prph); 261 262 void iwl_clear_bits_prph(struct iwl_trans *trans, u32 ofs, u32 mask) 263 { 264 unsigned long flags; 265 u32 val; 266 267 if (iwl_trans_grab_nic_access(trans, &flags)) { 268 val = iwl_read_prph_no_grab(trans, ofs); 269 iwl_write_prph_no_grab(trans, ofs, (val & ~mask)); 270 iwl_trans_release_nic_access(trans, &flags); 271 } 272 } 273 IWL_EXPORT_SYMBOL(iwl_clear_bits_prph); 274 275 void iwl_force_nmi(struct iwl_trans *trans) 276 { 277 if (trans->trans_cfg->device_family < IWL_DEVICE_FAMILY_9000) 278 iwl_write_prph(trans, DEVICE_SET_NMI_REG, 279 DEVICE_SET_NMI_VAL_DRV); 280 else if (trans->trans_cfg->device_family < IWL_DEVICE_FAMILY_AX210) 281 iwl_write_umac_prph(trans, UREG_NIC_SET_NMI_DRIVER, 282 UREG_NIC_SET_NMI_DRIVER_NMI_FROM_DRIVER_MSK); 283 else 284 iwl_write_umac_prph(trans, UREG_DOORBELL_TO_ISR6, 285 UREG_DOORBELL_TO_ISR6_NMI_BIT); 286 } 287 IWL_EXPORT_SYMBOL(iwl_force_nmi); 288 289 static const char *get_rfh_string(int cmd) 290 { 291 #define IWL_CMD(x) case x: return #x 292 #define IWL_CMD_MQ(arg, reg, q) { if (arg == reg(q)) return #reg; } 293 294 int i; 295 296 for (i = 0; i < IWL_MAX_RX_HW_QUEUES; i++) { 297 IWL_CMD_MQ(cmd, RFH_Q_FRBDCB_BA_LSB, i); 298 IWL_CMD_MQ(cmd, RFH_Q_FRBDCB_WIDX, i); 299 IWL_CMD_MQ(cmd, RFH_Q_FRBDCB_RIDX, i); 300 IWL_CMD_MQ(cmd, RFH_Q_URBD_STTS_WPTR_LSB, i); 301 } 302 303 switch (cmd) { 304 IWL_CMD(RFH_RXF_DMA_CFG); 305 IWL_CMD(RFH_GEN_CFG); 306 IWL_CMD(RFH_GEN_STATUS); 307 IWL_CMD(FH_TSSR_TX_STATUS_REG); 308 IWL_CMD(FH_TSSR_TX_ERROR_REG); 309 default: 310 return "UNKNOWN"; 311 } 312 #undef IWL_CMD_MQ 313 } 314 315 struct reg { 316 u32 addr; 317 bool is64; 318 }; 319 320 static int iwl_dump_rfh(struct iwl_trans *trans, char **buf) 321 { 322 int i, q; 323 int num_q = trans->num_rx_queues; 324 static const u32 rfh_tbl[] = { 325 RFH_RXF_DMA_CFG, 326 RFH_GEN_CFG, 327 RFH_GEN_STATUS, 328 FH_TSSR_TX_STATUS_REG, 329 FH_TSSR_TX_ERROR_REG, 330 }; 331 static const struct reg rfh_mq_tbl[] = { 332 { RFH_Q0_FRBDCB_BA_LSB, true }, 333 { RFH_Q0_FRBDCB_WIDX, false }, 334 { RFH_Q0_FRBDCB_RIDX, false }, 335 { RFH_Q0_URBD_STTS_WPTR_LSB, true }, 336 }; 337 338 #ifdef CONFIG_IWLWIFI_DEBUGFS 339 if (buf) { 340 int pos = 0; 341 /* 342 * Register (up to 34 for name + 8 blank/q for MQ): 40 chars 343 * Colon + space: 2 characters 344 * 0X%08x: 10 characters 345 * New line: 1 character 346 * Total of 53 characters 347 */ 348 size_t bufsz = ARRAY_SIZE(rfh_tbl) * 53 + 349 ARRAY_SIZE(rfh_mq_tbl) * 53 * num_q + 40; 350 351 *buf = kmalloc(bufsz, GFP_KERNEL); 352 if (!*buf) 353 return -ENOMEM; 354 355 pos += scnprintf(*buf + pos, bufsz - pos, 356 "RFH register values:\n"); 357 358 for (i = 0; i < ARRAY_SIZE(rfh_tbl); i++) 359 pos += scnprintf(*buf + pos, bufsz - pos, 360 "%40s: 0X%08x\n", 361 get_rfh_string(rfh_tbl[i]), 362 iwl_read_prph(trans, rfh_tbl[i])); 363 364 for (i = 0; i < ARRAY_SIZE(rfh_mq_tbl); i++) 365 for (q = 0; q < num_q; q++) { 366 u32 addr = rfh_mq_tbl[i].addr; 367 368 addr += q * (rfh_mq_tbl[i].is64 ? 8 : 4); 369 pos += scnprintf(*buf + pos, bufsz - pos, 370 "%34s(q %2d): 0X%08x\n", 371 get_rfh_string(addr), q, 372 iwl_read_prph(trans, addr)); 373 } 374 375 return pos; 376 } 377 #endif 378 379 IWL_ERR(trans, "RFH register values:\n"); 380 for (i = 0; i < ARRAY_SIZE(rfh_tbl); i++) 381 IWL_ERR(trans, " %34s: 0X%08x\n", 382 get_rfh_string(rfh_tbl[i]), 383 iwl_read_prph(trans, rfh_tbl[i])); 384 385 for (i = 0; i < ARRAY_SIZE(rfh_mq_tbl); i++) 386 for (q = 0; q < num_q; q++) { 387 u32 addr = rfh_mq_tbl[i].addr; 388 389 addr += q * (rfh_mq_tbl[i].is64 ? 8 : 4); 390 IWL_ERR(trans, " %34s(q %d): 0X%08x\n", 391 get_rfh_string(addr), q, 392 iwl_read_prph(trans, addr)); 393 } 394 395 return 0; 396 } 397 398 static const char *get_fh_string(int cmd) 399 { 400 switch (cmd) { 401 IWL_CMD(FH_RSCSR_CHNL0_STTS_WPTR_REG); 402 IWL_CMD(FH_RSCSR_CHNL0_RBDCB_BASE_REG); 403 IWL_CMD(FH_RSCSR_CHNL0_WPTR); 404 IWL_CMD(FH_MEM_RCSR_CHNL0_CONFIG_REG); 405 IWL_CMD(FH_MEM_RSSR_SHARED_CTRL_REG); 406 IWL_CMD(FH_MEM_RSSR_RX_STATUS_REG); 407 IWL_CMD(FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV); 408 IWL_CMD(FH_TSSR_TX_STATUS_REG); 409 IWL_CMD(FH_TSSR_TX_ERROR_REG); 410 default: 411 return "UNKNOWN"; 412 } 413 #undef IWL_CMD 414 } 415 416 int iwl_dump_fh(struct iwl_trans *trans, char **buf) 417 { 418 int i; 419 static const u32 fh_tbl[] = { 420 FH_RSCSR_CHNL0_STTS_WPTR_REG, 421 FH_RSCSR_CHNL0_RBDCB_BASE_REG, 422 FH_RSCSR_CHNL0_WPTR, 423 FH_MEM_RCSR_CHNL0_CONFIG_REG, 424 FH_MEM_RSSR_SHARED_CTRL_REG, 425 FH_MEM_RSSR_RX_STATUS_REG, 426 FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV, 427 FH_TSSR_TX_STATUS_REG, 428 FH_TSSR_TX_ERROR_REG 429 }; 430 431 if (trans->trans_cfg->mq_rx_supported) 432 return iwl_dump_rfh(trans, buf); 433 434 #ifdef CONFIG_IWLWIFI_DEBUGFS 435 if (buf) { 436 int pos = 0; 437 size_t bufsz = ARRAY_SIZE(fh_tbl) * 48 + 40; 438 439 *buf = kmalloc(bufsz, GFP_KERNEL); 440 if (!*buf) 441 return -ENOMEM; 442 443 pos += scnprintf(*buf + pos, bufsz - pos, 444 "FH register values:\n"); 445 446 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) 447 pos += scnprintf(*buf + pos, bufsz - pos, 448 " %34s: 0X%08x\n", 449 get_fh_string(fh_tbl[i]), 450 iwl_read_direct32(trans, fh_tbl[i])); 451 452 return pos; 453 } 454 #endif 455 456 IWL_ERR(trans, "FH register values:\n"); 457 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) 458 IWL_ERR(trans, " %34s: 0X%08x\n", 459 get_fh_string(fh_tbl[i]), 460 iwl_read_direct32(trans, fh_tbl[i])); 461 462 return 0; 463 } 464 465 int iwl_finish_nic_init(struct iwl_trans *trans, 466 const struct iwl_cfg_trans_params *cfg_trans) 467 { 468 int err; 469 470 if (cfg_trans->bisr_workaround) { 471 /* ensure the TOP FSM isn't still in previous reset */ 472 mdelay(2); 473 } 474 475 /* 476 * Set "initialization complete" bit to move adapter from 477 * D0U* --> D0A* (powered-up active) state. 478 */ 479 iwl_set_bit(trans, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE); 480 481 if (cfg_trans->device_family == IWL_DEVICE_FAMILY_8000) 482 udelay(2); 483 484 /* 485 * Wait for clock stabilization; once stabilized, access to 486 * device-internal resources is supported, e.g. iwl_write_prph() 487 * and accesses to uCode SRAM. 488 */ 489 err = iwl_poll_bit(trans, CSR_GP_CNTRL, 490 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 491 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 492 25000); 493 if (err < 0) 494 IWL_DEBUG_INFO(trans, "Failed to wake NIC\n"); 495 496 if (cfg_trans->bisr_workaround) { 497 /* ensure BISR shift has finished */ 498 udelay(200); 499 } 500 501 return err < 0 ? err : 0; 502 } 503 IWL_EXPORT_SYMBOL(iwl_finish_nic_init); 504