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 * 11 * This program is free software; you can redistribute it and/or modify it 12 * under the terms of version 2 of the GNU General Public License as 13 * published by the Free Software Foundation. 14 * 15 * This program is distributed in the hope that it will be useful, but WITHOUT 16 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 17 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 18 * more details. 19 * 20 * The full GNU General Public License is included in this distribution in the 21 * file called COPYING. 22 * 23 * Contact Information: 24 * Intel Linux Wireless <linuxwifi@intel.com> 25 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 26 * 27 * BSD LICENSE 28 * 29 * Copyright(c) 2003 - 2014 Intel Corporation. All rights reserved. 30 * Copyright(c) 2015 - 2016 Intel Deutschland GmbH 31 * All rights reserved. 32 * 33 * Redistribution and use in source and binary forms, with or without 34 * modification, are permitted provided that the following conditions 35 * are met: 36 * 37 * * Redistributions of source code must retain the above copyright 38 * notice, this list of conditions and the following disclaimer. 39 * * Redistributions in binary form must reproduce the above copyright 40 * notice, this list of conditions and the following disclaimer in 41 * the documentation and/or other materials provided with the 42 * distribution. 43 * * Neither the name Intel Corporation nor the names of its 44 * contributors may be used to endorse or promote products derived 45 * from this software without specific prior written permission. 46 * 47 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 48 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 49 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 50 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 51 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 52 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 53 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 54 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 55 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 56 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 57 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 58 * 59 *****************************************************************************/ 60 #include <linux/delay.h> 61 #include <linux/device.h> 62 #include <linux/export.h> 63 64 #include "iwl-drv.h" 65 #include "iwl-io.h" 66 #include "iwl-csr.h" 67 #include "iwl-debug.h" 68 #include "iwl-prph.h" 69 #include "iwl-fh.h" 70 71 void iwl_write8(struct iwl_trans *trans, u32 ofs, u8 val) 72 { 73 trace_iwlwifi_dev_iowrite8(trans->dev, ofs, val); 74 iwl_trans_write8(trans, ofs, val); 75 } 76 IWL_EXPORT_SYMBOL(iwl_write8); 77 78 void iwl_write32(struct iwl_trans *trans, u32 ofs, u32 val) 79 { 80 trace_iwlwifi_dev_iowrite32(trans->dev, ofs, val); 81 iwl_trans_write32(trans, ofs, val); 82 } 83 IWL_EXPORT_SYMBOL(iwl_write32); 84 85 void iwl_write64(struct iwl_trans *trans, u64 ofs, u64 val) 86 { 87 trace_iwlwifi_dev_iowrite64(trans->dev, ofs, val); 88 iwl_trans_write32(trans, ofs, lower_32_bits(val)); 89 iwl_trans_write32(trans, ofs + 4, upper_32_bits(val)); 90 } 91 IWL_EXPORT_SYMBOL(iwl_write64); 92 93 u32 iwl_read32(struct iwl_trans *trans, u32 ofs) 94 { 95 u32 val = iwl_trans_read32(trans, ofs); 96 97 trace_iwlwifi_dev_ioread32(trans->dev, ofs, val); 98 return val; 99 } 100 IWL_EXPORT_SYMBOL(iwl_read32); 101 102 #define IWL_POLL_INTERVAL 10 /* microseconds */ 103 104 int iwl_poll_bit(struct iwl_trans *trans, u32 addr, 105 u32 bits, u32 mask, int timeout) 106 { 107 int t = 0; 108 109 do { 110 if ((iwl_read32(trans, addr) & mask) == (bits & mask)) 111 return t; 112 udelay(IWL_POLL_INTERVAL); 113 t += IWL_POLL_INTERVAL; 114 } while (t < timeout); 115 116 return -ETIMEDOUT; 117 } 118 IWL_EXPORT_SYMBOL(iwl_poll_bit); 119 120 u32 iwl_read_direct32(struct iwl_trans *trans, u32 reg) 121 { 122 u32 value = 0x5a5a5a5a; 123 unsigned long flags; 124 if (iwl_trans_grab_nic_access(trans, &flags)) { 125 value = iwl_read32(trans, reg); 126 iwl_trans_release_nic_access(trans, &flags); 127 } 128 129 return value; 130 } 131 IWL_EXPORT_SYMBOL(iwl_read_direct32); 132 133 void iwl_write_direct32(struct iwl_trans *trans, u32 reg, u32 value) 134 { 135 unsigned long flags; 136 137 if (iwl_trans_grab_nic_access(trans, &flags)) { 138 iwl_write32(trans, reg, value); 139 iwl_trans_release_nic_access(trans, &flags); 140 } 141 } 142 IWL_EXPORT_SYMBOL(iwl_write_direct32); 143 144 void iwl_write_direct64(struct iwl_trans *trans, u64 reg, u64 value) 145 { 146 unsigned long flags; 147 148 if (iwl_trans_grab_nic_access(trans, &flags)) { 149 iwl_write64(trans, reg, value); 150 iwl_trans_release_nic_access(trans, &flags); 151 } 152 } 153 IWL_EXPORT_SYMBOL(iwl_write_direct64); 154 155 int iwl_poll_direct_bit(struct iwl_trans *trans, u32 addr, u32 mask, 156 int timeout) 157 { 158 int t = 0; 159 160 do { 161 if ((iwl_read_direct32(trans, addr) & mask) == mask) 162 return t; 163 udelay(IWL_POLL_INTERVAL); 164 t += IWL_POLL_INTERVAL; 165 } while (t < timeout); 166 167 return -ETIMEDOUT; 168 } 169 IWL_EXPORT_SYMBOL(iwl_poll_direct_bit); 170 171 u32 iwl_read_prph_no_grab(struct iwl_trans *trans, u32 ofs) 172 { 173 u32 val = iwl_trans_read_prph(trans, ofs); 174 trace_iwlwifi_dev_ioread_prph32(trans->dev, ofs, val); 175 return val; 176 } 177 IWL_EXPORT_SYMBOL(iwl_read_prph_no_grab); 178 179 void iwl_write_prph_no_grab(struct iwl_trans *trans, u32 ofs, u32 val) 180 { 181 trace_iwlwifi_dev_iowrite_prph32(trans->dev, ofs, val); 182 iwl_trans_write_prph(trans, ofs, val); 183 } 184 IWL_EXPORT_SYMBOL(iwl_write_prph_no_grab); 185 186 void iwl_write_prph64_no_grab(struct iwl_trans *trans, u64 ofs, u64 val) 187 { 188 trace_iwlwifi_dev_iowrite_prph64(trans->dev, ofs, val); 189 iwl_write_prph_no_grab(trans, ofs, val & 0xffffffff); 190 iwl_write_prph_no_grab(trans, ofs + 4, val >> 32); 191 } 192 IWL_EXPORT_SYMBOL(iwl_write_prph64_no_grab); 193 194 u32 iwl_read_prph(struct iwl_trans *trans, u32 ofs) 195 { 196 unsigned long flags; 197 u32 val = 0x5a5a5a5a; 198 199 if (iwl_trans_grab_nic_access(trans, &flags)) { 200 val = iwl_read_prph_no_grab(trans, ofs); 201 iwl_trans_release_nic_access(trans, &flags); 202 } 203 return val; 204 } 205 IWL_EXPORT_SYMBOL(iwl_read_prph); 206 207 void iwl_write_prph(struct iwl_trans *trans, u32 ofs, u32 val) 208 { 209 unsigned long flags; 210 211 if (iwl_trans_grab_nic_access(trans, &flags)) { 212 iwl_write_prph_no_grab(trans, ofs, val); 213 iwl_trans_release_nic_access(trans, &flags); 214 } 215 } 216 IWL_EXPORT_SYMBOL(iwl_write_prph); 217 218 int iwl_poll_prph_bit(struct iwl_trans *trans, u32 addr, 219 u32 bits, u32 mask, int timeout) 220 { 221 int t = 0; 222 223 do { 224 if ((iwl_read_prph(trans, addr) & mask) == (bits & mask)) 225 return t; 226 udelay(IWL_POLL_INTERVAL); 227 t += IWL_POLL_INTERVAL; 228 } while (t < timeout); 229 230 return -ETIMEDOUT; 231 } 232 233 void iwl_set_bits_prph(struct iwl_trans *trans, u32 ofs, u32 mask) 234 { 235 unsigned long flags; 236 237 if (iwl_trans_grab_nic_access(trans, &flags)) { 238 iwl_write_prph_no_grab(trans, ofs, 239 iwl_read_prph_no_grab(trans, ofs) | 240 mask); 241 iwl_trans_release_nic_access(trans, &flags); 242 } 243 } 244 IWL_EXPORT_SYMBOL(iwl_set_bits_prph); 245 246 void iwl_set_bits_mask_prph(struct iwl_trans *trans, u32 ofs, 247 u32 bits, u32 mask) 248 { 249 unsigned long flags; 250 251 if (iwl_trans_grab_nic_access(trans, &flags)) { 252 iwl_write_prph_no_grab(trans, ofs, 253 (iwl_read_prph_no_grab(trans, ofs) & 254 mask) | bits); 255 iwl_trans_release_nic_access(trans, &flags); 256 } 257 } 258 IWL_EXPORT_SYMBOL(iwl_set_bits_mask_prph); 259 260 void iwl_clear_bits_prph(struct iwl_trans *trans, u32 ofs, u32 mask) 261 { 262 unsigned long flags; 263 u32 val; 264 265 if (iwl_trans_grab_nic_access(trans, &flags)) { 266 val = iwl_read_prph_no_grab(trans, ofs); 267 iwl_write_prph_no_grab(trans, ofs, (val & ~mask)); 268 iwl_trans_release_nic_access(trans, &flags); 269 } 270 } 271 IWL_EXPORT_SYMBOL(iwl_clear_bits_prph); 272 273 void iwl_force_nmi(struct iwl_trans *trans) 274 { 275 if (trans->cfg->device_family < IWL_DEVICE_FAMILY_9000) 276 iwl_write_prph(trans, DEVICE_SET_NMI_REG, 277 DEVICE_SET_NMI_VAL_DRV); 278 else 279 iwl_write_prph(trans, UREG_NIC_SET_NMI_DRIVER, 280 UREG_NIC_SET_NMI_DRIVER_NMI_FROM_DRIVER_MSK); 281 } 282 IWL_EXPORT_SYMBOL(iwl_force_nmi); 283 284 static const char *get_rfh_string(int cmd) 285 { 286 #define IWL_CMD(x) case x: return #x 287 #define IWL_CMD_MQ(arg, reg, q) { if (arg == reg(q)) return #reg; } 288 289 int i; 290 291 for (i = 0; i < IWL_MAX_RX_HW_QUEUES; i++) { 292 IWL_CMD_MQ(cmd, RFH_Q_FRBDCB_BA_LSB, i); 293 IWL_CMD_MQ(cmd, RFH_Q_FRBDCB_WIDX, i); 294 IWL_CMD_MQ(cmd, RFH_Q_FRBDCB_RIDX, i); 295 IWL_CMD_MQ(cmd, RFH_Q_URBD_STTS_WPTR_LSB, i); 296 } 297 298 switch (cmd) { 299 IWL_CMD(RFH_RXF_DMA_CFG); 300 IWL_CMD(RFH_GEN_CFG); 301 IWL_CMD(RFH_GEN_STATUS); 302 IWL_CMD(FH_TSSR_TX_STATUS_REG); 303 IWL_CMD(FH_TSSR_TX_ERROR_REG); 304 default: 305 return "UNKNOWN"; 306 } 307 #undef IWL_CMD_MQ 308 } 309 310 struct reg { 311 u32 addr; 312 bool is64; 313 }; 314 315 static int iwl_dump_rfh(struct iwl_trans *trans, char **buf) 316 { 317 int i, q; 318 int num_q = trans->num_rx_queues; 319 static const u32 rfh_tbl[] = { 320 RFH_RXF_DMA_CFG, 321 RFH_GEN_CFG, 322 RFH_GEN_STATUS, 323 FH_TSSR_TX_STATUS_REG, 324 FH_TSSR_TX_ERROR_REG, 325 }; 326 static const struct reg rfh_mq_tbl[] = { 327 { RFH_Q0_FRBDCB_BA_LSB, true }, 328 { RFH_Q0_FRBDCB_WIDX, false }, 329 { RFH_Q0_FRBDCB_RIDX, false }, 330 { RFH_Q0_URBD_STTS_WPTR_LSB, true }, 331 }; 332 333 #ifdef CONFIG_IWLWIFI_DEBUGFS 334 if (buf) { 335 int pos = 0; 336 /* 337 * Register (up to 34 for name + 8 blank/q for MQ): 40 chars 338 * Colon + space: 2 characters 339 * 0X%08x: 10 characters 340 * New line: 1 character 341 * Total of 53 characters 342 */ 343 size_t bufsz = ARRAY_SIZE(rfh_tbl) * 53 + 344 ARRAY_SIZE(rfh_mq_tbl) * 53 * num_q + 40; 345 346 *buf = kmalloc(bufsz, GFP_KERNEL); 347 if (!*buf) 348 return -ENOMEM; 349 350 pos += scnprintf(*buf + pos, bufsz - pos, 351 "RFH register values:\n"); 352 353 for (i = 0; i < ARRAY_SIZE(rfh_tbl); i++) 354 pos += scnprintf(*buf + pos, bufsz - pos, 355 "%40s: 0X%08x\n", 356 get_rfh_string(rfh_tbl[i]), 357 iwl_read_prph(trans, rfh_tbl[i])); 358 359 for (i = 0; i < ARRAY_SIZE(rfh_mq_tbl); i++) 360 for (q = 0; q < num_q; q++) { 361 u32 addr = rfh_mq_tbl[i].addr; 362 363 addr += q * (rfh_mq_tbl[i].is64 ? 8 : 4); 364 pos += scnprintf(*buf + pos, bufsz - pos, 365 "%34s(q %2d): 0X%08x\n", 366 get_rfh_string(addr), q, 367 iwl_read_prph(trans, addr)); 368 } 369 370 return pos; 371 } 372 #endif 373 374 IWL_ERR(trans, "RFH register values:\n"); 375 for (i = 0; i < ARRAY_SIZE(rfh_tbl); i++) 376 IWL_ERR(trans, " %34s: 0X%08x\n", 377 get_rfh_string(rfh_tbl[i]), 378 iwl_read_prph(trans, rfh_tbl[i])); 379 380 for (i = 0; i < ARRAY_SIZE(rfh_mq_tbl); i++) 381 for (q = 0; q < num_q; q++) { 382 u32 addr = rfh_mq_tbl[i].addr; 383 384 addr += q * (rfh_mq_tbl[i].is64 ? 8 : 4); 385 IWL_ERR(trans, " %34s(q %d): 0X%08x\n", 386 get_rfh_string(addr), q, 387 iwl_read_prph(trans, addr)); 388 } 389 390 return 0; 391 } 392 393 static const char *get_fh_string(int cmd) 394 { 395 switch (cmd) { 396 IWL_CMD(FH_RSCSR_CHNL0_STTS_WPTR_REG); 397 IWL_CMD(FH_RSCSR_CHNL0_RBDCB_BASE_REG); 398 IWL_CMD(FH_RSCSR_CHNL0_WPTR); 399 IWL_CMD(FH_MEM_RCSR_CHNL0_CONFIG_REG); 400 IWL_CMD(FH_MEM_RSSR_SHARED_CTRL_REG); 401 IWL_CMD(FH_MEM_RSSR_RX_STATUS_REG); 402 IWL_CMD(FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV); 403 IWL_CMD(FH_TSSR_TX_STATUS_REG); 404 IWL_CMD(FH_TSSR_TX_ERROR_REG); 405 default: 406 return "UNKNOWN"; 407 } 408 #undef IWL_CMD 409 } 410 411 int iwl_dump_fh(struct iwl_trans *trans, char **buf) 412 { 413 int i; 414 static const u32 fh_tbl[] = { 415 FH_RSCSR_CHNL0_STTS_WPTR_REG, 416 FH_RSCSR_CHNL0_RBDCB_BASE_REG, 417 FH_RSCSR_CHNL0_WPTR, 418 FH_MEM_RCSR_CHNL0_CONFIG_REG, 419 FH_MEM_RSSR_SHARED_CTRL_REG, 420 FH_MEM_RSSR_RX_STATUS_REG, 421 FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV, 422 FH_TSSR_TX_STATUS_REG, 423 FH_TSSR_TX_ERROR_REG 424 }; 425 426 if (trans->cfg->mq_rx_supported) 427 return iwl_dump_rfh(trans, buf); 428 429 #ifdef CONFIG_IWLWIFI_DEBUGFS 430 if (buf) { 431 int pos = 0; 432 size_t bufsz = ARRAY_SIZE(fh_tbl) * 48 + 40; 433 434 *buf = kmalloc(bufsz, GFP_KERNEL); 435 if (!*buf) 436 return -ENOMEM; 437 438 pos += scnprintf(*buf + pos, bufsz - pos, 439 "FH register values:\n"); 440 441 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) 442 pos += scnprintf(*buf + pos, bufsz - pos, 443 " %34s: 0X%08x\n", 444 get_fh_string(fh_tbl[i]), 445 iwl_read_direct32(trans, fh_tbl[i])); 446 447 return pos; 448 } 449 #endif 450 451 IWL_ERR(trans, "FH register values:\n"); 452 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) 453 IWL_ERR(trans, " %34s: 0X%08x\n", 454 get_fh_string(fh_tbl[i]), 455 iwl_read_direct32(trans, fh_tbl[i])); 456 457 return 0; 458 } 459