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 40 void 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 } 45 IWL_EXPORT_SYMBOL(iwl_write8); 46 47 void 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 } 52 IWL_EXPORT_SYMBOL(iwl_write32); 53 54 void 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 } 60 IWL_EXPORT_SYMBOL(iwl_write64); 61 62 u32 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 } 69 IWL_EXPORT_SYMBOL(iwl_read32); 70 71 #define IWL_POLL_INTERVAL 10 /* microseconds */ 72 73 int 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 } 87 IWL_EXPORT_SYMBOL(iwl_poll_bit); 88 89 u32 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 } 100 IWL_EXPORT_SYMBOL(iwl_read_direct32); 101 102 void 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 } 111 IWL_EXPORT_SYMBOL(iwl_write_direct32); 112 113 void 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 } 122 IWL_EXPORT_SYMBOL(iwl_write_direct64); 123 124 int 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 } 138 IWL_EXPORT_SYMBOL(iwl_poll_direct_bit); 139 140 u32 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 } 146 IWL_EXPORT_SYMBOL(iwl_read_prph_no_grab); 147 148 void 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 } 153 IWL_EXPORT_SYMBOL(iwl_write_prph_no_grab); 154 155 void 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 } 161 IWL_EXPORT_SYMBOL(iwl_write_prph64_no_grab); 162 163 u32 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 } 174 IWL_EXPORT_SYMBOL(iwl_read_prph); 175 176 void 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 } 185 IWL_EXPORT_SYMBOL(iwl_write_prph); 186 187 int 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 } 201 202 void 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 } 213 IWL_EXPORT_SYMBOL(iwl_set_bits_prph); 214 215 void 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 } 227 IWL_EXPORT_SYMBOL(iwl_set_bits_mask_prph); 228 229 void 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 } 240 IWL_EXPORT_SYMBOL(iwl_clear_bits_prph); 241 242 void iwl_force_nmi(struct iwl_trans *trans) 243 { 244 if (trans->cfg->device_family < IWL_DEVICE_FAMILY_8000) { 245 iwl_write_prph(trans, DEVICE_SET_NMI_REG, 246 DEVICE_SET_NMI_VAL_DRV); 247 iwl_write_prph(trans, DEVICE_SET_NMI_REG, 248 DEVICE_SET_NMI_VAL_HW); 249 } else if (trans->cfg->device_family == IWL_DEVICE_FAMILY_A000) { 250 iwl_write_prph(trans, UREG_NIC_SET_NMI_DRIVER, 251 DEVICE_SET_NMI_8000_VAL); 252 } else { 253 iwl_write_prph(trans, DEVICE_SET_NMI_8000_REG, 254 DEVICE_SET_NMI_8000_VAL); 255 iwl_write_prph(trans, DEVICE_SET_NMI_REG, 256 DEVICE_SET_NMI_VAL_DRV); 257 } 258 } 259 IWL_EXPORT_SYMBOL(iwl_force_nmi); 260 261 static const char *get_rfh_string(int cmd) 262 { 263 #define IWL_CMD(x) case x: return #x 264 #define IWL_CMD_MQ(arg, reg, q) { if (arg == reg(q)) return #reg; } 265 266 int i; 267 268 for (i = 0; i < IWL_MAX_RX_HW_QUEUES; i++) { 269 IWL_CMD_MQ(cmd, RFH_Q_FRBDCB_BA_LSB, i); 270 IWL_CMD_MQ(cmd, RFH_Q_FRBDCB_WIDX, i); 271 IWL_CMD_MQ(cmd, RFH_Q_FRBDCB_RIDX, i); 272 IWL_CMD_MQ(cmd, RFH_Q_URBD_STTS_WPTR_LSB, i); 273 } 274 275 switch (cmd) { 276 IWL_CMD(RFH_RXF_DMA_CFG); 277 IWL_CMD(RFH_GEN_CFG); 278 IWL_CMD(RFH_GEN_STATUS); 279 IWL_CMD(FH_TSSR_TX_STATUS_REG); 280 IWL_CMD(FH_TSSR_TX_ERROR_REG); 281 default: 282 return "UNKNOWN"; 283 } 284 #undef IWL_CMD_MQ 285 } 286 287 struct reg { 288 u32 addr; 289 bool is64; 290 }; 291 292 static int iwl_dump_rfh(struct iwl_trans *trans, char **buf) 293 { 294 int i, q; 295 int num_q = trans->num_rx_queues; 296 static const u32 rfh_tbl[] = { 297 RFH_RXF_DMA_CFG, 298 RFH_GEN_CFG, 299 RFH_GEN_STATUS, 300 FH_TSSR_TX_STATUS_REG, 301 FH_TSSR_TX_ERROR_REG, 302 }; 303 static const struct reg rfh_mq_tbl[] = { 304 { RFH_Q0_FRBDCB_BA_LSB, true }, 305 { RFH_Q0_FRBDCB_WIDX, false }, 306 { RFH_Q0_FRBDCB_RIDX, false }, 307 { RFH_Q0_URBD_STTS_WPTR_LSB, true }, 308 }; 309 310 #ifdef CONFIG_IWLWIFI_DEBUGFS 311 if (buf) { 312 int pos = 0; 313 /* 314 * Register (up to 34 for name + 8 blank/q for MQ): 40 chars 315 * Colon + space: 2 characters 316 * 0X%08x: 10 characters 317 * New line: 1 character 318 * Total of 53 characters 319 */ 320 size_t bufsz = ARRAY_SIZE(rfh_tbl) * 53 + 321 ARRAY_SIZE(rfh_mq_tbl) * 53 * num_q + 40; 322 323 *buf = kmalloc(bufsz, GFP_KERNEL); 324 if (!*buf) 325 return -ENOMEM; 326 327 pos += scnprintf(*buf + pos, bufsz - pos, 328 "RFH register values:\n"); 329 330 for (i = 0; i < ARRAY_SIZE(rfh_tbl); i++) 331 pos += scnprintf(*buf + pos, bufsz - pos, 332 "%40s: 0X%08x\n", 333 get_rfh_string(rfh_tbl[i]), 334 iwl_read_prph(trans, rfh_tbl[i])); 335 336 for (i = 0; i < ARRAY_SIZE(rfh_mq_tbl); i++) 337 for (q = 0; q < num_q; q++) { 338 u32 addr = rfh_mq_tbl[i].addr; 339 340 addr += q * (rfh_mq_tbl[i].is64 ? 8 : 4); 341 pos += scnprintf(*buf + pos, bufsz - pos, 342 "%34s(q %2d): 0X%08x\n", 343 get_rfh_string(addr), q, 344 iwl_read_prph(trans, addr)); 345 } 346 347 return pos; 348 } 349 #endif 350 351 IWL_ERR(trans, "RFH register values:\n"); 352 for (i = 0; i < ARRAY_SIZE(rfh_tbl); i++) 353 IWL_ERR(trans, " %34s: 0X%08x\n", 354 get_rfh_string(rfh_tbl[i]), 355 iwl_read_prph(trans, rfh_tbl[i])); 356 357 for (i = 0; i < ARRAY_SIZE(rfh_mq_tbl); i++) 358 for (q = 0; q < num_q; q++) { 359 u32 addr = rfh_mq_tbl[i].addr; 360 361 addr += q * (rfh_mq_tbl[i].is64 ? 8 : 4); 362 IWL_ERR(trans, " %34s(q %d): 0X%08x\n", 363 get_rfh_string(addr), q, 364 iwl_read_prph(trans, addr)); 365 } 366 367 return 0; 368 } 369 370 static const char *get_fh_string(int cmd) 371 { 372 switch (cmd) { 373 IWL_CMD(FH_RSCSR_CHNL0_STTS_WPTR_REG); 374 IWL_CMD(FH_RSCSR_CHNL0_RBDCB_BASE_REG); 375 IWL_CMD(FH_RSCSR_CHNL0_WPTR); 376 IWL_CMD(FH_MEM_RCSR_CHNL0_CONFIG_REG); 377 IWL_CMD(FH_MEM_RSSR_SHARED_CTRL_REG); 378 IWL_CMD(FH_MEM_RSSR_RX_STATUS_REG); 379 IWL_CMD(FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV); 380 IWL_CMD(FH_TSSR_TX_STATUS_REG); 381 IWL_CMD(FH_TSSR_TX_ERROR_REG); 382 default: 383 return "UNKNOWN"; 384 } 385 #undef IWL_CMD 386 } 387 388 int iwl_dump_fh(struct iwl_trans *trans, char **buf) 389 { 390 int i; 391 static const u32 fh_tbl[] = { 392 FH_RSCSR_CHNL0_STTS_WPTR_REG, 393 FH_RSCSR_CHNL0_RBDCB_BASE_REG, 394 FH_RSCSR_CHNL0_WPTR, 395 FH_MEM_RCSR_CHNL0_CONFIG_REG, 396 FH_MEM_RSSR_SHARED_CTRL_REG, 397 FH_MEM_RSSR_RX_STATUS_REG, 398 FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV, 399 FH_TSSR_TX_STATUS_REG, 400 FH_TSSR_TX_ERROR_REG 401 }; 402 403 if (trans->cfg->mq_rx_supported) 404 return iwl_dump_rfh(trans, buf); 405 406 #ifdef CONFIG_IWLWIFI_DEBUGFS 407 if (buf) { 408 int pos = 0; 409 size_t bufsz = ARRAY_SIZE(fh_tbl) * 48 + 40; 410 411 *buf = kmalloc(bufsz, GFP_KERNEL); 412 if (!*buf) 413 return -ENOMEM; 414 415 pos += scnprintf(*buf + pos, bufsz - pos, 416 "FH register values:\n"); 417 418 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) 419 pos += scnprintf(*buf + pos, bufsz - pos, 420 " %34s: 0X%08x\n", 421 get_fh_string(fh_tbl[i]), 422 iwl_read_direct32(trans, fh_tbl[i])); 423 424 return pos; 425 } 426 #endif 427 428 IWL_ERR(trans, "FH register values:\n"); 429 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) 430 IWL_ERR(trans, " %34s: 0X%08x\n", 431 get_fh_string(fh_tbl[i]), 432 iwl_read_direct32(trans, fh_tbl[i])); 433 434 return 0; 435 } 436