1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause 2 /* 3 * Copyright (C) 2007-2015, 2018-2020 Intel Corporation 4 * Copyright (C) 2013-2015 Intel Mobile Communications GmbH 5 * Copyright (C) 2016-2017 Intel Deutschland GmbH 6 */ 7 #include <linux/pci.h> 8 #include <linux/interrupt.h> 9 #include <linux/debugfs.h> 10 #include <linux/sched.h> 11 #include <linux/bitops.h> 12 #include <linux/gfp.h> 13 #include <linux/vmalloc.h> 14 #include <linux/module.h> 15 #include <linux/wait.h> 16 #include <linux/seq_file.h> 17 18 #include "iwl-drv.h" 19 #include "iwl-trans.h" 20 #include "iwl-csr.h" 21 #include "iwl-prph.h" 22 #include "iwl-scd.h" 23 #include "iwl-agn-hw.h" 24 #include "fw/error-dump.h" 25 #include "fw/dbg.h" 26 #include "fw/api/tx.h" 27 #include "internal.h" 28 #include "iwl-fh.h" 29 #include "iwl-context-info-gen3.h" 30 31 /* extended range in FW SRAM */ 32 #define IWL_FW_MEM_EXTENDED_START 0x40000 33 #define IWL_FW_MEM_EXTENDED_END 0x57FFF 34 35 void iwl_trans_pcie_dump_regs(struct iwl_trans *trans) 36 { 37 #define PCI_DUMP_SIZE 352 38 #define PCI_MEM_DUMP_SIZE 64 39 #define PCI_PARENT_DUMP_SIZE 524 40 #define PREFIX_LEN 32 41 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); 42 struct pci_dev *pdev = trans_pcie->pci_dev; 43 u32 i, pos, alloc_size, *ptr, *buf; 44 char *prefix; 45 46 if (trans_pcie->pcie_dbg_dumped_once) 47 return; 48 49 /* Should be a multiple of 4 */ 50 BUILD_BUG_ON(PCI_DUMP_SIZE > 4096 || PCI_DUMP_SIZE & 0x3); 51 BUILD_BUG_ON(PCI_MEM_DUMP_SIZE > 4096 || PCI_MEM_DUMP_SIZE & 0x3); 52 BUILD_BUG_ON(PCI_PARENT_DUMP_SIZE > 4096 || PCI_PARENT_DUMP_SIZE & 0x3); 53 54 /* Alloc a max size buffer */ 55 alloc_size = PCI_ERR_ROOT_ERR_SRC + 4 + PREFIX_LEN; 56 alloc_size = max_t(u32, alloc_size, PCI_DUMP_SIZE + PREFIX_LEN); 57 alloc_size = max_t(u32, alloc_size, PCI_MEM_DUMP_SIZE + PREFIX_LEN); 58 alloc_size = max_t(u32, alloc_size, PCI_PARENT_DUMP_SIZE + PREFIX_LEN); 59 60 buf = kmalloc(alloc_size, GFP_ATOMIC); 61 if (!buf) 62 return; 63 prefix = (char *)buf + alloc_size - PREFIX_LEN; 64 65 IWL_ERR(trans, "iwlwifi transaction failed, dumping registers\n"); 66 67 /* Print wifi device registers */ 68 sprintf(prefix, "iwlwifi %s: ", pci_name(pdev)); 69 IWL_ERR(trans, "iwlwifi device config registers:\n"); 70 for (i = 0, ptr = buf; i < PCI_DUMP_SIZE; i += 4, ptr++) 71 if (pci_read_config_dword(pdev, i, ptr)) 72 goto err_read; 73 print_hex_dump(KERN_ERR, prefix, DUMP_PREFIX_OFFSET, 32, 4, buf, i, 0); 74 75 IWL_ERR(trans, "iwlwifi device memory mapped registers:\n"); 76 for (i = 0, ptr = buf; i < PCI_MEM_DUMP_SIZE; i += 4, ptr++) 77 *ptr = iwl_read32(trans, i); 78 print_hex_dump(KERN_ERR, prefix, DUMP_PREFIX_OFFSET, 32, 4, buf, i, 0); 79 80 pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_ERR); 81 if (pos) { 82 IWL_ERR(trans, "iwlwifi device AER capability structure:\n"); 83 for (i = 0, ptr = buf; i < PCI_ERR_ROOT_COMMAND; i += 4, ptr++) 84 if (pci_read_config_dword(pdev, pos + i, ptr)) 85 goto err_read; 86 print_hex_dump(KERN_ERR, prefix, DUMP_PREFIX_OFFSET, 87 32, 4, buf, i, 0); 88 } 89 90 /* Print parent device registers next */ 91 if (!pdev->bus->self) 92 goto out; 93 94 pdev = pdev->bus->self; 95 sprintf(prefix, "iwlwifi %s: ", pci_name(pdev)); 96 97 IWL_ERR(trans, "iwlwifi parent port (%s) config registers:\n", 98 pci_name(pdev)); 99 for (i = 0, ptr = buf; i < PCI_PARENT_DUMP_SIZE; i += 4, ptr++) 100 if (pci_read_config_dword(pdev, i, ptr)) 101 goto err_read; 102 print_hex_dump(KERN_ERR, prefix, DUMP_PREFIX_OFFSET, 32, 4, buf, i, 0); 103 104 /* Print root port AER registers */ 105 pos = 0; 106 pdev = pcie_find_root_port(pdev); 107 if (pdev) 108 pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_ERR); 109 if (pos) { 110 IWL_ERR(trans, "iwlwifi root port (%s) AER cap structure:\n", 111 pci_name(pdev)); 112 sprintf(prefix, "iwlwifi %s: ", pci_name(pdev)); 113 for (i = 0, ptr = buf; i <= PCI_ERR_ROOT_ERR_SRC; i += 4, ptr++) 114 if (pci_read_config_dword(pdev, pos + i, ptr)) 115 goto err_read; 116 print_hex_dump(KERN_ERR, prefix, DUMP_PREFIX_OFFSET, 32, 117 4, buf, i, 0); 118 } 119 goto out; 120 121 err_read: 122 print_hex_dump(KERN_ERR, prefix, DUMP_PREFIX_OFFSET, 32, 4, buf, i, 0); 123 IWL_ERR(trans, "Read failed at 0x%X\n", i); 124 out: 125 trans_pcie->pcie_dbg_dumped_once = 1; 126 kfree(buf); 127 } 128 129 static void iwl_trans_pcie_sw_reset(struct iwl_trans *trans) 130 { 131 /* Reset entire device - do controller reset (results in SHRD_HW_RST) */ 132 iwl_set_bit(trans, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET); 133 usleep_range(5000, 6000); 134 } 135 136 static void iwl_pcie_free_fw_monitor(struct iwl_trans *trans) 137 { 138 struct iwl_dram_data *fw_mon = &trans->dbg.fw_mon; 139 140 if (!fw_mon->size) 141 return; 142 143 dma_free_coherent(trans->dev, fw_mon->size, fw_mon->block, 144 fw_mon->physical); 145 146 fw_mon->block = NULL; 147 fw_mon->physical = 0; 148 fw_mon->size = 0; 149 } 150 151 static void iwl_pcie_alloc_fw_monitor_block(struct iwl_trans *trans, 152 u8 max_power, u8 min_power) 153 { 154 struct iwl_dram_data *fw_mon = &trans->dbg.fw_mon; 155 void *block = NULL; 156 dma_addr_t physical = 0; 157 u32 size = 0; 158 u8 power; 159 160 if (fw_mon->size) 161 return; 162 163 for (power = max_power; power >= min_power; power--) { 164 size = BIT(power); 165 block = dma_alloc_coherent(trans->dev, size, &physical, 166 GFP_KERNEL | __GFP_NOWARN); 167 if (!block) 168 continue; 169 170 IWL_INFO(trans, 171 "Allocated 0x%08x bytes for firmware monitor.\n", 172 size); 173 break; 174 } 175 176 if (WARN_ON_ONCE(!block)) 177 return; 178 179 if (power != max_power) 180 IWL_ERR(trans, 181 "Sorry - debug buffer is only %luK while you requested %luK\n", 182 (unsigned long)BIT(power - 10), 183 (unsigned long)BIT(max_power - 10)); 184 185 fw_mon->block = block; 186 fw_mon->physical = physical; 187 fw_mon->size = size; 188 } 189 190 void iwl_pcie_alloc_fw_monitor(struct iwl_trans *trans, u8 max_power) 191 { 192 if (!max_power) { 193 /* default max_power is maximum */ 194 max_power = 26; 195 } else { 196 max_power += 11; 197 } 198 199 if (WARN(max_power > 26, 200 "External buffer size for monitor is too big %d, check the FW TLV\n", 201 max_power)) 202 return; 203 204 if (trans->dbg.fw_mon.size) 205 return; 206 207 iwl_pcie_alloc_fw_monitor_block(trans, max_power, 11); 208 } 209 210 static u32 iwl_trans_pcie_read_shr(struct iwl_trans *trans, u32 reg) 211 { 212 iwl_write32(trans, HEEP_CTRL_WRD_PCIEX_CTRL_REG, 213 ((reg & 0x0000ffff) | (2 << 28))); 214 return iwl_read32(trans, HEEP_CTRL_WRD_PCIEX_DATA_REG); 215 } 216 217 static void iwl_trans_pcie_write_shr(struct iwl_trans *trans, u32 reg, u32 val) 218 { 219 iwl_write32(trans, HEEP_CTRL_WRD_PCIEX_DATA_REG, val); 220 iwl_write32(trans, HEEP_CTRL_WRD_PCIEX_CTRL_REG, 221 ((reg & 0x0000ffff) | (3 << 28))); 222 } 223 224 static void iwl_pcie_set_pwr(struct iwl_trans *trans, bool vaux) 225 { 226 if (trans->cfg->apmg_not_supported) 227 return; 228 229 if (vaux && pci_pme_capable(to_pci_dev(trans->dev), PCI_D3cold)) 230 iwl_set_bits_mask_prph(trans, APMG_PS_CTRL_REG, 231 APMG_PS_CTRL_VAL_PWR_SRC_VAUX, 232 ~APMG_PS_CTRL_MSK_PWR_SRC); 233 else 234 iwl_set_bits_mask_prph(trans, APMG_PS_CTRL_REG, 235 APMG_PS_CTRL_VAL_PWR_SRC_VMAIN, 236 ~APMG_PS_CTRL_MSK_PWR_SRC); 237 } 238 239 /* PCI registers */ 240 #define PCI_CFG_RETRY_TIMEOUT 0x041 241 242 void iwl_pcie_apm_config(struct iwl_trans *trans) 243 { 244 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); 245 u16 lctl; 246 u16 cap; 247 248 /* 249 * L0S states have been found to be unstable with our devices 250 * and in newer hardware they are not officially supported at 251 * all, so we must always set the L0S_DISABLED bit. 252 */ 253 iwl_set_bit(trans, CSR_GIO_REG, CSR_GIO_REG_VAL_L0S_DISABLED); 254 255 pcie_capability_read_word(trans_pcie->pci_dev, PCI_EXP_LNKCTL, &lctl); 256 trans->pm_support = !(lctl & PCI_EXP_LNKCTL_ASPM_L0S); 257 258 pcie_capability_read_word(trans_pcie->pci_dev, PCI_EXP_DEVCTL2, &cap); 259 trans->ltr_enabled = cap & PCI_EXP_DEVCTL2_LTR_EN; 260 IWL_DEBUG_POWER(trans, "L1 %sabled - LTR %sabled\n", 261 (lctl & PCI_EXP_LNKCTL_ASPM_L1) ? "En" : "Dis", 262 trans->ltr_enabled ? "En" : "Dis"); 263 } 264 265 /* 266 * Start up NIC's basic functionality after it has been reset 267 * (e.g. after platform boot, or shutdown via iwl_pcie_apm_stop()) 268 * NOTE: This does not load uCode nor start the embedded processor 269 */ 270 static int iwl_pcie_apm_init(struct iwl_trans *trans) 271 { 272 int ret; 273 274 IWL_DEBUG_INFO(trans, "Init card's basic functions\n"); 275 276 /* 277 * Use "set_bit" below rather than "write", to preserve any hardware 278 * bits already set by default after reset. 279 */ 280 281 /* Disable L0S exit timer (platform NMI Work/Around) */ 282 if (trans->trans_cfg->device_family < IWL_DEVICE_FAMILY_8000) 283 iwl_set_bit(trans, CSR_GIO_CHICKEN_BITS, 284 CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER); 285 286 /* 287 * Disable L0s without affecting L1; 288 * don't wait for ICH L0s (ICH bug W/A) 289 */ 290 iwl_set_bit(trans, CSR_GIO_CHICKEN_BITS, 291 CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX); 292 293 /* Set FH wait threshold to maximum (HW error during stress W/A) */ 294 iwl_set_bit(trans, CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL); 295 296 /* 297 * Enable HAP INTA (interrupt from management bus) to 298 * wake device's PCI Express link L1a -> L0s 299 */ 300 iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG, 301 CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A); 302 303 iwl_pcie_apm_config(trans); 304 305 /* Configure analog phase-lock-loop before activating to D0A */ 306 if (trans->trans_cfg->base_params->pll_cfg) 307 iwl_set_bit(trans, CSR_ANA_PLL_CFG, CSR50_ANA_PLL_CFG_VAL); 308 309 ret = iwl_finish_nic_init(trans, trans->trans_cfg); 310 if (ret) 311 return ret; 312 313 if (trans->cfg->host_interrupt_operation_mode) { 314 /* 315 * This is a bit of an abuse - This is needed for 7260 / 3160 316 * only check host_interrupt_operation_mode even if this is 317 * not related to host_interrupt_operation_mode. 318 * 319 * Enable the oscillator to count wake up time for L1 exit. This 320 * consumes slightly more power (100uA) - but allows to be sure 321 * that we wake up from L1 on time. 322 * 323 * This looks weird: read twice the same register, discard the 324 * value, set a bit, and yet again, read that same register 325 * just to discard the value. But that's the way the hardware 326 * seems to like it. 327 */ 328 iwl_read_prph(trans, OSC_CLK); 329 iwl_read_prph(trans, OSC_CLK); 330 iwl_set_bits_prph(trans, OSC_CLK, OSC_CLK_FORCE_CONTROL); 331 iwl_read_prph(trans, OSC_CLK); 332 iwl_read_prph(trans, OSC_CLK); 333 } 334 335 /* 336 * Enable DMA clock and wait for it to stabilize. 337 * 338 * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" 339 * bits do not disable clocks. This preserves any hardware 340 * bits already set by default in "CLK_CTRL_REG" after reset. 341 */ 342 if (!trans->cfg->apmg_not_supported) { 343 iwl_write_prph(trans, APMG_CLK_EN_REG, 344 APMG_CLK_VAL_DMA_CLK_RQT); 345 udelay(20); 346 347 /* Disable L1-Active */ 348 iwl_set_bits_prph(trans, APMG_PCIDEV_STT_REG, 349 APMG_PCIDEV_STT_VAL_L1_ACT_DIS); 350 351 /* Clear the interrupt in APMG if the NIC is in RFKILL */ 352 iwl_write_prph(trans, APMG_RTC_INT_STT_REG, 353 APMG_RTC_INT_STT_RFKILL); 354 } 355 356 set_bit(STATUS_DEVICE_ENABLED, &trans->status); 357 358 return 0; 359 } 360 361 /* 362 * Enable LP XTAL to avoid HW bug where device may consume much power if 363 * FW is not loaded after device reset. LP XTAL is disabled by default 364 * after device HW reset. Do it only if XTAL is fed by internal source. 365 * Configure device's "persistence" mode to avoid resetting XTAL again when 366 * SHRD_HW_RST occurs in S3. 367 */ 368 static void iwl_pcie_apm_lp_xtal_enable(struct iwl_trans *trans) 369 { 370 int ret; 371 u32 apmg_gp1_reg; 372 u32 apmg_xtal_cfg_reg; 373 u32 dl_cfg_reg; 374 375 /* Force XTAL ON */ 376 __iwl_trans_pcie_set_bit(trans, CSR_GP_CNTRL, 377 CSR_GP_CNTRL_REG_FLAG_XTAL_ON); 378 379 iwl_trans_pcie_sw_reset(trans); 380 381 ret = iwl_finish_nic_init(trans, trans->trans_cfg); 382 if (WARN_ON(ret)) { 383 /* Release XTAL ON request */ 384 __iwl_trans_pcie_clear_bit(trans, CSR_GP_CNTRL, 385 CSR_GP_CNTRL_REG_FLAG_XTAL_ON); 386 return; 387 } 388 389 /* 390 * Clear "disable persistence" to avoid LP XTAL resetting when 391 * SHRD_HW_RST is applied in S3. 392 */ 393 iwl_clear_bits_prph(trans, APMG_PCIDEV_STT_REG, 394 APMG_PCIDEV_STT_VAL_PERSIST_DIS); 395 396 /* 397 * Force APMG XTAL to be active to prevent its disabling by HW 398 * caused by APMG idle state. 399 */ 400 apmg_xtal_cfg_reg = iwl_trans_pcie_read_shr(trans, 401 SHR_APMG_XTAL_CFG_REG); 402 iwl_trans_pcie_write_shr(trans, SHR_APMG_XTAL_CFG_REG, 403 apmg_xtal_cfg_reg | 404 SHR_APMG_XTAL_CFG_XTAL_ON_REQ); 405 406 iwl_trans_pcie_sw_reset(trans); 407 408 /* Enable LP XTAL by indirect access through CSR */ 409 apmg_gp1_reg = iwl_trans_pcie_read_shr(trans, SHR_APMG_GP1_REG); 410 iwl_trans_pcie_write_shr(trans, SHR_APMG_GP1_REG, apmg_gp1_reg | 411 SHR_APMG_GP1_WF_XTAL_LP_EN | 412 SHR_APMG_GP1_CHICKEN_BIT_SELECT); 413 414 /* Clear delay line clock power up */ 415 dl_cfg_reg = iwl_trans_pcie_read_shr(trans, SHR_APMG_DL_CFG_REG); 416 iwl_trans_pcie_write_shr(trans, SHR_APMG_DL_CFG_REG, dl_cfg_reg & 417 ~SHR_APMG_DL_CFG_DL_CLOCK_POWER_UP); 418 419 /* 420 * Enable persistence mode to avoid LP XTAL resetting when 421 * SHRD_HW_RST is applied in S3. 422 */ 423 iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG, 424 CSR_HW_IF_CONFIG_REG_PERSIST_MODE); 425 426 /* 427 * Clear "initialization complete" bit to move adapter from 428 * D0A* (powered-up Active) --> D0U* (Uninitialized) state. 429 */ 430 iwl_clear_bit(trans, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE); 431 432 /* Activates XTAL resources monitor */ 433 __iwl_trans_pcie_set_bit(trans, CSR_MONITOR_CFG_REG, 434 CSR_MONITOR_XTAL_RESOURCES); 435 436 /* Release XTAL ON request */ 437 __iwl_trans_pcie_clear_bit(trans, CSR_GP_CNTRL, 438 CSR_GP_CNTRL_REG_FLAG_XTAL_ON); 439 udelay(10); 440 441 /* Release APMG XTAL */ 442 iwl_trans_pcie_write_shr(trans, SHR_APMG_XTAL_CFG_REG, 443 apmg_xtal_cfg_reg & 444 ~SHR_APMG_XTAL_CFG_XTAL_ON_REQ); 445 } 446 447 void iwl_pcie_apm_stop_master(struct iwl_trans *trans) 448 { 449 int ret; 450 451 /* stop device's busmaster DMA activity */ 452 iwl_set_bit(trans, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER); 453 454 ret = iwl_poll_bit(trans, CSR_RESET, 455 CSR_RESET_REG_FLAG_MASTER_DISABLED, 456 CSR_RESET_REG_FLAG_MASTER_DISABLED, 100); 457 if (ret < 0) 458 IWL_WARN(trans, "Master Disable Timed Out, 100 usec\n"); 459 460 IWL_DEBUG_INFO(trans, "stop master\n"); 461 } 462 463 static void iwl_pcie_apm_stop(struct iwl_trans *trans, bool op_mode_leave) 464 { 465 IWL_DEBUG_INFO(trans, "Stop card, put in low power state\n"); 466 467 if (op_mode_leave) { 468 if (!test_bit(STATUS_DEVICE_ENABLED, &trans->status)) 469 iwl_pcie_apm_init(trans); 470 471 /* inform ME that we are leaving */ 472 if (trans->trans_cfg->device_family == IWL_DEVICE_FAMILY_7000) 473 iwl_set_bits_prph(trans, APMG_PCIDEV_STT_REG, 474 APMG_PCIDEV_STT_VAL_WAKE_ME); 475 else if (trans->trans_cfg->device_family >= 476 IWL_DEVICE_FAMILY_8000) { 477 iwl_set_bit(trans, CSR_DBG_LINK_PWR_MGMT_REG, 478 CSR_RESET_LINK_PWR_MGMT_DISABLED); 479 iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG, 480 CSR_HW_IF_CONFIG_REG_PREPARE | 481 CSR_HW_IF_CONFIG_REG_ENABLE_PME); 482 mdelay(1); 483 iwl_clear_bit(trans, CSR_DBG_LINK_PWR_MGMT_REG, 484 CSR_RESET_LINK_PWR_MGMT_DISABLED); 485 } 486 mdelay(5); 487 } 488 489 clear_bit(STATUS_DEVICE_ENABLED, &trans->status); 490 491 /* Stop device's DMA activity */ 492 iwl_pcie_apm_stop_master(trans); 493 494 if (trans->cfg->lp_xtal_workaround) { 495 iwl_pcie_apm_lp_xtal_enable(trans); 496 return; 497 } 498 499 iwl_trans_pcie_sw_reset(trans); 500 501 /* 502 * Clear "initialization complete" bit to move adapter from 503 * D0A* (powered-up Active) --> D0U* (Uninitialized) state. 504 */ 505 iwl_clear_bit(trans, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE); 506 } 507 508 static int iwl_pcie_nic_init(struct iwl_trans *trans) 509 { 510 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); 511 int ret; 512 513 /* nic_init */ 514 spin_lock_bh(&trans_pcie->irq_lock); 515 ret = iwl_pcie_apm_init(trans); 516 spin_unlock_bh(&trans_pcie->irq_lock); 517 518 if (ret) 519 return ret; 520 521 iwl_pcie_set_pwr(trans, false); 522 523 iwl_op_mode_nic_config(trans->op_mode); 524 525 /* Allocate the RX queue, or reset if it is already allocated */ 526 ret = iwl_pcie_rx_init(trans); 527 if (ret) 528 return ret; 529 530 /* Allocate or reset and init all Tx and Command queues */ 531 if (iwl_pcie_tx_init(trans)) { 532 iwl_pcie_rx_free(trans); 533 return -ENOMEM; 534 } 535 536 if (trans->trans_cfg->base_params->shadow_reg_enable) { 537 /* enable shadow regs in HW */ 538 iwl_set_bit(trans, CSR_MAC_SHADOW_REG_CTRL, 0x800FFFFF); 539 IWL_DEBUG_INFO(trans, "Enabling shadow registers in device\n"); 540 } 541 542 return 0; 543 } 544 545 #define HW_READY_TIMEOUT (50) 546 547 /* Note: returns poll_bit return value, which is >= 0 if success */ 548 static int iwl_pcie_set_hw_ready(struct iwl_trans *trans) 549 { 550 int ret; 551 552 iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG, 553 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY); 554 555 /* See if we got it */ 556 ret = iwl_poll_bit(trans, CSR_HW_IF_CONFIG_REG, 557 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY, 558 CSR_HW_IF_CONFIG_REG_BIT_NIC_READY, 559 HW_READY_TIMEOUT); 560 561 if (ret >= 0) 562 iwl_set_bit(trans, CSR_MBOX_SET_REG, CSR_MBOX_SET_REG_OS_ALIVE); 563 564 IWL_DEBUG_INFO(trans, "hardware%s ready\n", ret < 0 ? " not" : ""); 565 return ret; 566 } 567 568 /* Note: returns standard 0/-ERROR code */ 569 int iwl_pcie_prepare_card_hw(struct iwl_trans *trans) 570 { 571 int ret; 572 int t = 0; 573 int iter; 574 575 IWL_DEBUG_INFO(trans, "iwl_trans_prepare_card_hw enter\n"); 576 577 ret = iwl_pcie_set_hw_ready(trans); 578 /* If the card is ready, exit 0 */ 579 if (ret >= 0) 580 return 0; 581 582 iwl_set_bit(trans, CSR_DBG_LINK_PWR_MGMT_REG, 583 CSR_RESET_LINK_PWR_MGMT_DISABLED); 584 usleep_range(1000, 2000); 585 586 for (iter = 0; iter < 10; iter++) { 587 /* If HW is not ready, prepare the conditions to check again */ 588 iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG, 589 CSR_HW_IF_CONFIG_REG_PREPARE); 590 591 do { 592 ret = iwl_pcie_set_hw_ready(trans); 593 if (ret >= 0) 594 return 0; 595 596 usleep_range(200, 1000); 597 t += 200; 598 } while (t < 150000); 599 msleep(25); 600 } 601 602 IWL_ERR(trans, "Couldn't prepare the card\n"); 603 604 return ret; 605 } 606 607 /* 608 * ucode 609 */ 610 static void iwl_pcie_load_firmware_chunk_fh(struct iwl_trans *trans, 611 u32 dst_addr, dma_addr_t phy_addr, 612 u32 byte_cnt) 613 { 614 iwl_write32(trans, FH_TCSR_CHNL_TX_CONFIG_REG(FH_SRVC_CHNL), 615 FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_PAUSE); 616 617 iwl_write32(trans, FH_SRVC_CHNL_SRAM_ADDR_REG(FH_SRVC_CHNL), 618 dst_addr); 619 620 iwl_write32(trans, FH_TFDIB_CTRL0_REG(FH_SRVC_CHNL), 621 phy_addr & FH_MEM_TFDIB_DRAM_ADDR_LSB_MSK); 622 623 iwl_write32(trans, FH_TFDIB_CTRL1_REG(FH_SRVC_CHNL), 624 (iwl_get_dma_hi_addr(phy_addr) 625 << FH_MEM_TFDIB_REG1_ADDR_BITSHIFT) | byte_cnt); 626 627 iwl_write32(trans, FH_TCSR_CHNL_TX_BUF_STS_REG(FH_SRVC_CHNL), 628 BIT(FH_TCSR_CHNL_TX_BUF_STS_REG_POS_TB_NUM) | 629 BIT(FH_TCSR_CHNL_TX_BUF_STS_REG_POS_TB_IDX) | 630 FH_TCSR_CHNL_TX_BUF_STS_REG_VAL_TFDB_VALID); 631 632 iwl_write32(trans, FH_TCSR_CHNL_TX_CONFIG_REG(FH_SRVC_CHNL), 633 FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE | 634 FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_DISABLE | 635 FH_TCSR_TX_CONFIG_REG_VAL_CIRQ_HOST_ENDTFD); 636 } 637 638 static int iwl_pcie_load_firmware_chunk(struct iwl_trans *trans, 639 u32 dst_addr, dma_addr_t phy_addr, 640 u32 byte_cnt) 641 { 642 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); 643 int ret; 644 645 trans_pcie->ucode_write_complete = false; 646 647 if (!iwl_trans_grab_nic_access(trans)) 648 return -EIO; 649 650 iwl_pcie_load_firmware_chunk_fh(trans, dst_addr, phy_addr, 651 byte_cnt); 652 iwl_trans_release_nic_access(trans); 653 654 ret = wait_event_timeout(trans_pcie->ucode_write_waitq, 655 trans_pcie->ucode_write_complete, 5 * HZ); 656 if (!ret) { 657 IWL_ERR(trans, "Failed to load firmware chunk!\n"); 658 iwl_trans_pcie_dump_regs(trans); 659 return -ETIMEDOUT; 660 } 661 662 return 0; 663 } 664 665 static int iwl_pcie_load_section(struct iwl_trans *trans, u8 section_num, 666 const struct fw_desc *section) 667 { 668 u8 *v_addr; 669 dma_addr_t p_addr; 670 u32 offset, chunk_sz = min_t(u32, FH_MEM_TB_MAX_LENGTH, section->len); 671 int ret = 0; 672 673 IWL_DEBUG_FW(trans, "[%d] uCode section being loaded...\n", 674 section_num); 675 676 v_addr = dma_alloc_coherent(trans->dev, chunk_sz, &p_addr, 677 GFP_KERNEL | __GFP_NOWARN); 678 if (!v_addr) { 679 IWL_DEBUG_INFO(trans, "Falling back to small chunks of DMA\n"); 680 chunk_sz = PAGE_SIZE; 681 v_addr = dma_alloc_coherent(trans->dev, chunk_sz, 682 &p_addr, GFP_KERNEL); 683 if (!v_addr) 684 return -ENOMEM; 685 } 686 687 for (offset = 0; offset < section->len; offset += chunk_sz) { 688 u32 copy_size, dst_addr; 689 bool extended_addr = false; 690 691 copy_size = min_t(u32, chunk_sz, section->len - offset); 692 dst_addr = section->offset + offset; 693 694 if (dst_addr >= IWL_FW_MEM_EXTENDED_START && 695 dst_addr <= IWL_FW_MEM_EXTENDED_END) 696 extended_addr = true; 697 698 if (extended_addr) 699 iwl_set_bits_prph(trans, LMPM_CHICK, 700 LMPM_CHICK_EXTENDED_ADDR_SPACE); 701 702 memcpy(v_addr, (u8 *)section->data + offset, copy_size); 703 ret = iwl_pcie_load_firmware_chunk(trans, dst_addr, p_addr, 704 copy_size); 705 706 if (extended_addr) 707 iwl_clear_bits_prph(trans, LMPM_CHICK, 708 LMPM_CHICK_EXTENDED_ADDR_SPACE); 709 710 if (ret) { 711 IWL_ERR(trans, 712 "Could not load the [%d] uCode section\n", 713 section_num); 714 break; 715 } 716 } 717 718 dma_free_coherent(trans->dev, chunk_sz, v_addr, p_addr); 719 return ret; 720 } 721 722 static int iwl_pcie_load_cpu_sections_8000(struct iwl_trans *trans, 723 const struct fw_img *image, 724 int cpu, 725 int *first_ucode_section) 726 { 727 int shift_param; 728 int i, ret = 0, sec_num = 0x1; 729 u32 val, last_read_idx = 0; 730 731 if (cpu == 1) { 732 shift_param = 0; 733 *first_ucode_section = 0; 734 } else { 735 shift_param = 16; 736 (*first_ucode_section)++; 737 } 738 739 for (i = *first_ucode_section; i < image->num_sec; i++) { 740 last_read_idx = i; 741 742 /* 743 * CPU1_CPU2_SEPARATOR_SECTION delimiter - separate between 744 * CPU1 to CPU2. 745 * PAGING_SEPARATOR_SECTION delimiter - separate between 746 * CPU2 non paged to CPU2 paging sec. 747 */ 748 if (!image->sec[i].data || 749 image->sec[i].offset == CPU1_CPU2_SEPARATOR_SECTION || 750 image->sec[i].offset == PAGING_SEPARATOR_SECTION) { 751 IWL_DEBUG_FW(trans, 752 "Break since Data not valid or Empty section, sec = %d\n", 753 i); 754 break; 755 } 756 757 ret = iwl_pcie_load_section(trans, i, &image->sec[i]); 758 if (ret) 759 return ret; 760 761 /* Notify ucode of loaded section number and status */ 762 val = iwl_read_direct32(trans, FH_UCODE_LOAD_STATUS); 763 val = val | (sec_num << shift_param); 764 iwl_write_direct32(trans, FH_UCODE_LOAD_STATUS, val); 765 766 sec_num = (sec_num << 1) | 0x1; 767 } 768 769 *first_ucode_section = last_read_idx; 770 771 iwl_enable_interrupts(trans); 772 773 if (trans->trans_cfg->use_tfh) { 774 if (cpu == 1) 775 iwl_write_prph(trans, UREG_UCODE_LOAD_STATUS, 776 0xFFFF); 777 else 778 iwl_write_prph(trans, UREG_UCODE_LOAD_STATUS, 779 0xFFFFFFFF); 780 } else { 781 if (cpu == 1) 782 iwl_write_direct32(trans, FH_UCODE_LOAD_STATUS, 783 0xFFFF); 784 else 785 iwl_write_direct32(trans, FH_UCODE_LOAD_STATUS, 786 0xFFFFFFFF); 787 } 788 789 return 0; 790 } 791 792 static int iwl_pcie_load_cpu_sections(struct iwl_trans *trans, 793 const struct fw_img *image, 794 int cpu, 795 int *first_ucode_section) 796 { 797 int i, ret = 0; 798 u32 last_read_idx = 0; 799 800 if (cpu == 1) 801 *first_ucode_section = 0; 802 else 803 (*first_ucode_section)++; 804 805 for (i = *first_ucode_section; i < image->num_sec; i++) { 806 last_read_idx = i; 807 808 /* 809 * CPU1_CPU2_SEPARATOR_SECTION delimiter - separate between 810 * CPU1 to CPU2. 811 * PAGING_SEPARATOR_SECTION delimiter - separate between 812 * CPU2 non paged to CPU2 paging sec. 813 */ 814 if (!image->sec[i].data || 815 image->sec[i].offset == CPU1_CPU2_SEPARATOR_SECTION || 816 image->sec[i].offset == PAGING_SEPARATOR_SECTION) { 817 IWL_DEBUG_FW(trans, 818 "Break since Data not valid or Empty section, sec = %d\n", 819 i); 820 break; 821 } 822 823 ret = iwl_pcie_load_section(trans, i, &image->sec[i]); 824 if (ret) 825 return ret; 826 } 827 828 *first_ucode_section = last_read_idx; 829 830 return 0; 831 } 832 833 static void iwl_pcie_apply_destination_ini(struct iwl_trans *trans) 834 { 835 enum iwl_fw_ini_allocation_id alloc_id = IWL_FW_INI_ALLOCATION_ID_DBGC1; 836 struct iwl_fw_ini_allocation_tlv *fw_mon_cfg = 837 &trans->dbg.fw_mon_cfg[alloc_id]; 838 struct iwl_dram_data *frag; 839 840 if (!iwl_trans_dbg_ini_valid(trans)) 841 return; 842 843 if (le32_to_cpu(fw_mon_cfg->buf_location) == 844 IWL_FW_INI_LOCATION_SRAM_PATH) { 845 IWL_DEBUG_FW(trans, "WRT: Applying SMEM buffer destination\n"); 846 /* set sram monitor by enabling bit 7 */ 847 iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG, 848 CSR_HW_IF_CONFIG_REG_BIT_MONITOR_SRAM); 849 850 return; 851 } 852 853 if (le32_to_cpu(fw_mon_cfg->buf_location) != 854 IWL_FW_INI_LOCATION_DRAM_PATH || 855 !trans->dbg.fw_mon_ini[alloc_id].num_frags) 856 return; 857 858 frag = &trans->dbg.fw_mon_ini[alloc_id].frags[0]; 859 860 IWL_DEBUG_FW(trans, "WRT: Applying DRAM destination (alloc_id=%u)\n", 861 alloc_id); 862 863 iwl_write_umac_prph(trans, MON_BUFF_BASE_ADDR_VER2, 864 frag->physical >> MON_BUFF_SHIFT_VER2); 865 iwl_write_umac_prph(trans, MON_BUFF_END_ADDR_VER2, 866 (frag->physical + frag->size - 256) >> 867 MON_BUFF_SHIFT_VER2); 868 } 869 870 void iwl_pcie_apply_destination(struct iwl_trans *trans) 871 { 872 const struct iwl_fw_dbg_dest_tlv_v1 *dest = trans->dbg.dest_tlv; 873 const struct iwl_dram_data *fw_mon = &trans->dbg.fw_mon; 874 int i; 875 876 if (iwl_trans_dbg_ini_valid(trans)) { 877 iwl_pcie_apply_destination_ini(trans); 878 return; 879 } 880 881 IWL_INFO(trans, "Applying debug destination %s\n", 882 get_fw_dbg_mode_string(dest->monitor_mode)); 883 884 if (dest->monitor_mode == EXTERNAL_MODE) 885 iwl_pcie_alloc_fw_monitor(trans, dest->size_power); 886 else 887 IWL_WARN(trans, "PCI should have external buffer debug\n"); 888 889 for (i = 0; i < trans->dbg.n_dest_reg; i++) { 890 u32 addr = le32_to_cpu(dest->reg_ops[i].addr); 891 u32 val = le32_to_cpu(dest->reg_ops[i].val); 892 893 switch (dest->reg_ops[i].op) { 894 case CSR_ASSIGN: 895 iwl_write32(trans, addr, val); 896 break; 897 case CSR_SETBIT: 898 iwl_set_bit(trans, addr, BIT(val)); 899 break; 900 case CSR_CLEARBIT: 901 iwl_clear_bit(trans, addr, BIT(val)); 902 break; 903 case PRPH_ASSIGN: 904 iwl_write_prph(trans, addr, val); 905 break; 906 case PRPH_SETBIT: 907 iwl_set_bits_prph(trans, addr, BIT(val)); 908 break; 909 case PRPH_CLEARBIT: 910 iwl_clear_bits_prph(trans, addr, BIT(val)); 911 break; 912 case PRPH_BLOCKBIT: 913 if (iwl_read_prph(trans, addr) & BIT(val)) { 914 IWL_ERR(trans, 915 "BIT(%u) in address 0x%x is 1, stopping FW configuration\n", 916 val, addr); 917 goto monitor; 918 } 919 break; 920 default: 921 IWL_ERR(trans, "FW debug - unknown OP %d\n", 922 dest->reg_ops[i].op); 923 break; 924 } 925 } 926 927 monitor: 928 if (dest->monitor_mode == EXTERNAL_MODE && fw_mon->size) { 929 iwl_write_prph(trans, le32_to_cpu(dest->base_reg), 930 fw_mon->physical >> dest->base_shift); 931 if (trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_8000) 932 iwl_write_prph(trans, le32_to_cpu(dest->end_reg), 933 (fw_mon->physical + fw_mon->size - 934 256) >> dest->end_shift); 935 else 936 iwl_write_prph(trans, le32_to_cpu(dest->end_reg), 937 (fw_mon->physical + fw_mon->size) >> 938 dest->end_shift); 939 } 940 } 941 942 static int iwl_pcie_load_given_ucode(struct iwl_trans *trans, 943 const struct fw_img *image) 944 { 945 int ret = 0; 946 int first_ucode_section; 947 948 IWL_DEBUG_FW(trans, "working with %s CPU\n", 949 image->is_dual_cpus ? "Dual" : "Single"); 950 951 /* load to FW the binary non secured sections of CPU1 */ 952 ret = iwl_pcie_load_cpu_sections(trans, image, 1, &first_ucode_section); 953 if (ret) 954 return ret; 955 956 if (image->is_dual_cpus) { 957 /* set CPU2 header address */ 958 iwl_write_prph(trans, 959 LMPM_SECURE_UCODE_LOAD_CPU2_HDR_ADDR, 960 LMPM_SECURE_CPU2_HDR_MEM_SPACE); 961 962 /* load to FW the binary sections of CPU2 */ 963 ret = iwl_pcie_load_cpu_sections(trans, image, 2, 964 &first_ucode_section); 965 if (ret) 966 return ret; 967 } 968 969 if (iwl_pcie_dbg_on(trans)) 970 iwl_pcie_apply_destination(trans); 971 972 iwl_enable_interrupts(trans); 973 974 /* release CPU reset */ 975 iwl_write32(trans, CSR_RESET, 0); 976 977 return 0; 978 } 979 980 static int iwl_pcie_load_given_ucode_8000(struct iwl_trans *trans, 981 const struct fw_img *image) 982 { 983 int ret = 0; 984 int first_ucode_section; 985 986 IWL_DEBUG_FW(trans, "working with %s CPU\n", 987 image->is_dual_cpus ? "Dual" : "Single"); 988 989 if (iwl_pcie_dbg_on(trans)) 990 iwl_pcie_apply_destination(trans); 991 992 IWL_DEBUG_POWER(trans, "Original WFPM value = 0x%08X\n", 993 iwl_read_prph(trans, WFPM_GP2)); 994 995 /* 996 * Set default value. On resume reading the values that were 997 * zeored can provide debug data on the resume flow. 998 * This is for debugging only and has no functional impact. 999 */ 1000 iwl_write_prph(trans, WFPM_GP2, 0x01010101); 1001 1002 /* configure the ucode to be ready to get the secured image */ 1003 /* release CPU reset */ 1004 iwl_write_prph(trans, RELEASE_CPU_RESET, RELEASE_CPU_RESET_BIT); 1005 1006 /* load to FW the binary Secured sections of CPU1 */ 1007 ret = iwl_pcie_load_cpu_sections_8000(trans, image, 1, 1008 &first_ucode_section); 1009 if (ret) 1010 return ret; 1011 1012 /* load to FW the binary sections of CPU2 */ 1013 return iwl_pcie_load_cpu_sections_8000(trans, image, 2, 1014 &first_ucode_section); 1015 } 1016 1017 bool iwl_pcie_check_hw_rf_kill(struct iwl_trans *trans) 1018 { 1019 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); 1020 bool hw_rfkill = iwl_is_rfkill_set(trans); 1021 bool prev = test_bit(STATUS_RFKILL_OPMODE, &trans->status); 1022 bool report; 1023 1024 if (hw_rfkill) { 1025 set_bit(STATUS_RFKILL_HW, &trans->status); 1026 set_bit(STATUS_RFKILL_OPMODE, &trans->status); 1027 } else { 1028 clear_bit(STATUS_RFKILL_HW, &trans->status); 1029 if (trans_pcie->opmode_down) 1030 clear_bit(STATUS_RFKILL_OPMODE, &trans->status); 1031 } 1032 1033 report = test_bit(STATUS_RFKILL_OPMODE, &trans->status); 1034 1035 if (prev != report) 1036 iwl_trans_pcie_rf_kill(trans, report); 1037 1038 return hw_rfkill; 1039 } 1040 1041 struct iwl_causes_list { 1042 u32 cause_num; 1043 u32 mask_reg; 1044 u8 addr; 1045 }; 1046 1047 static struct iwl_causes_list causes_list[] = { 1048 {MSIX_FH_INT_CAUSES_D2S_CH0_NUM, CSR_MSIX_FH_INT_MASK_AD, 0}, 1049 {MSIX_FH_INT_CAUSES_D2S_CH1_NUM, CSR_MSIX_FH_INT_MASK_AD, 0x1}, 1050 {MSIX_FH_INT_CAUSES_S2D, CSR_MSIX_FH_INT_MASK_AD, 0x3}, 1051 {MSIX_FH_INT_CAUSES_FH_ERR, CSR_MSIX_FH_INT_MASK_AD, 0x5}, 1052 {MSIX_HW_INT_CAUSES_REG_ALIVE, CSR_MSIX_HW_INT_MASK_AD, 0x10}, 1053 {MSIX_HW_INT_CAUSES_REG_WAKEUP, CSR_MSIX_HW_INT_MASK_AD, 0x11}, 1054 {MSIX_HW_INT_CAUSES_REG_RESET_DONE, CSR_MSIX_HW_INT_MASK_AD, 0x12}, 1055 {MSIX_HW_INT_CAUSES_REG_CT_KILL, CSR_MSIX_HW_INT_MASK_AD, 0x16}, 1056 {MSIX_HW_INT_CAUSES_REG_RF_KILL, CSR_MSIX_HW_INT_MASK_AD, 0x17}, 1057 {MSIX_HW_INT_CAUSES_REG_PERIODIC, CSR_MSIX_HW_INT_MASK_AD, 0x18}, 1058 {MSIX_HW_INT_CAUSES_REG_SW_ERR, CSR_MSIX_HW_INT_MASK_AD, 0x29}, 1059 {MSIX_HW_INT_CAUSES_REG_SCD, CSR_MSIX_HW_INT_MASK_AD, 0x2A}, 1060 {MSIX_HW_INT_CAUSES_REG_FH_TX, CSR_MSIX_HW_INT_MASK_AD, 0x2B}, 1061 {MSIX_HW_INT_CAUSES_REG_HW_ERR, CSR_MSIX_HW_INT_MASK_AD, 0x2D}, 1062 {MSIX_HW_INT_CAUSES_REG_HAP, CSR_MSIX_HW_INT_MASK_AD, 0x2E}, 1063 }; 1064 1065 static void iwl_pcie_map_non_rx_causes(struct iwl_trans *trans) 1066 { 1067 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); 1068 int val = trans_pcie->def_irq | MSIX_NON_AUTO_CLEAR_CAUSE; 1069 int i, arr_size = ARRAY_SIZE(causes_list); 1070 struct iwl_causes_list *causes = causes_list; 1071 1072 /* 1073 * Access all non RX causes and map them to the default irq. 1074 * In case we are missing at least one interrupt vector, 1075 * the first interrupt vector will serve non-RX and FBQ causes. 1076 */ 1077 for (i = 0; i < arr_size; i++) { 1078 iwl_write8(trans, CSR_MSIX_IVAR(causes[i].addr), val); 1079 iwl_clear_bit(trans, causes[i].mask_reg, 1080 causes[i].cause_num); 1081 } 1082 } 1083 1084 static void iwl_pcie_map_rx_causes(struct iwl_trans *trans) 1085 { 1086 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); 1087 u32 offset = 1088 trans_pcie->shared_vec_mask & IWL_SHARED_IRQ_FIRST_RSS ? 1 : 0; 1089 u32 val, idx; 1090 1091 /* 1092 * The first RX queue - fallback queue, which is designated for 1093 * management frame, command responses etc, is always mapped to the 1094 * first interrupt vector. The other RX queues are mapped to 1095 * the other (N - 2) interrupt vectors. 1096 */ 1097 val = BIT(MSIX_FH_INT_CAUSES_Q(0)); 1098 for (idx = 1; idx < trans->num_rx_queues; idx++) { 1099 iwl_write8(trans, CSR_MSIX_RX_IVAR(idx), 1100 MSIX_FH_INT_CAUSES_Q(idx - offset)); 1101 val |= BIT(MSIX_FH_INT_CAUSES_Q(idx)); 1102 } 1103 iwl_write32(trans, CSR_MSIX_FH_INT_MASK_AD, ~val); 1104 1105 val = MSIX_FH_INT_CAUSES_Q(0); 1106 if (trans_pcie->shared_vec_mask & IWL_SHARED_IRQ_NON_RX) 1107 val |= MSIX_NON_AUTO_CLEAR_CAUSE; 1108 iwl_write8(trans, CSR_MSIX_RX_IVAR(0), val); 1109 1110 if (trans_pcie->shared_vec_mask & IWL_SHARED_IRQ_FIRST_RSS) 1111 iwl_write8(trans, CSR_MSIX_RX_IVAR(1), val); 1112 } 1113 1114 void iwl_pcie_conf_msix_hw(struct iwl_trans_pcie *trans_pcie) 1115 { 1116 struct iwl_trans *trans = trans_pcie->trans; 1117 1118 if (!trans_pcie->msix_enabled) { 1119 if (trans->trans_cfg->mq_rx_supported && 1120 test_bit(STATUS_DEVICE_ENABLED, &trans->status)) 1121 iwl_write_umac_prph(trans, UREG_CHICK, 1122 UREG_CHICK_MSI_ENABLE); 1123 return; 1124 } 1125 /* 1126 * The IVAR table needs to be configured again after reset, 1127 * but if the device is disabled, we can't write to 1128 * prph. 1129 */ 1130 if (test_bit(STATUS_DEVICE_ENABLED, &trans->status)) 1131 iwl_write_umac_prph(trans, UREG_CHICK, UREG_CHICK_MSIX_ENABLE); 1132 1133 /* 1134 * Each cause from the causes list above and the RX causes is 1135 * represented as a byte in the IVAR table. The first nibble 1136 * represents the bound interrupt vector of the cause, the second 1137 * represents no auto clear for this cause. This will be set if its 1138 * interrupt vector is bound to serve other causes. 1139 */ 1140 iwl_pcie_map_rx_causes(trans); 1141 1142 iwl_pcie_map_non_rx_causes(trans); 1143 } 1144 1145 static void iwl_pcie_init_msix(struct iwl_trans_pcie *trans_pcie) 1146 { 1147 struct iwl_trans *trans = trans_pcie->trans; 1148 1149 iwl_pcie_conf_msix_hw(trans_pcie); 1150 1151 if (!trans_pcie->msix_enabled) 1152 return; 1153 1154 trans_pcie->fh_init_mask = ~iwl_read32(trans, CSR_MSIX_FH_INT_MASK_AD); 1155 trans_pcie->fh_mask = trans_pcie->fh_init_mask; 1156 trans_pcie->hw_init_mask = ~iwl_read32(trans, CSR_MSIX_HW_INT_MASK_AD); 1157 trans_pcie->hw_mask = trans_pcie->hw_init_mask; 1158 } 1159 1160 static void _iwl_trans_pcie_stop_device(struct iwl_trans *trans) 1161 { 1162 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); 1163 1164 lockdep_assert_held(&trans_pcie->mutex); 1165 1166 if (trans_pcie->is_down) 1167 return; 1168 1169 trans_pcie->is_down = true; 1170 1171 /* tell the device to stop sending interrupts */ 1172 iwl_disable_interrupts(trans); 1173 1174 /* device going down, Stop using ICT table */ 1175 iwl_pcie_disable_ict(trans); 1176 1177 /* 1178 * If a HW restart happens during firmware loading, 1179 * then the firmware loading might call this function 1180 * and later it might be called again due to the 1181 * restart. So don't process again if the device is 1182 * already dead. 1183 */ 1184 if (test_and_clear_bit(STATUS_DEVICE_ENABLED, &trans->status)) { 1185 IWL_DEBUG_INFO(trans, 1186 "DEVICE_ENABLED bit was set and is now cleared\n"); 1187 iwl_pcie_tx_stop(trans); 1188 iwl_pcie_rx_stop(trans); 1189 1190 /* Power-down device's busmaster DMA clocks */ 1191 if (!trans->cfg->apmg_not_supported) { 1192 iwl_write_prph(trans, APMG_CLK_DIS_REG, 1193 APMG_CLK_VAL_DMA_CLK_RQT); 1194 udelay(5); 1195 } 1196 } 1197 1198 /* Make sure (redundant) we've released our request to stay awake */ 1199 iwl_clear_bit(trans, CSR_GP_CNTRL, 1200 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ); 1201 1202 /* Stop the device, and put it in low power state */ 1203 iwl_pcie_apm_stop(trans, false); 1204 1205 iwl_trans_pcie_sw_reset(trans); 1206 1207 /* 1208 * Upon stop, the IVAR table gets erased, so msi-x won't 1209 * work. This causes a bug in RF-KILL flows, since the interrupt 1210 * that enables radio won't fire on the correct irq, and the 1211 * driver won't be able to handle the interrupt. 1212 * Configure the IVAR table again after reset. 1213 */ 1214 iwl_pcie_conf_msix_hw(trans_pcie); 1215 1216 /* 1217 * Upon stop, the APM issues an interrupt if HW RF kill is set. 1218 * This is a bug in certain verions of the hardware. 1219 * Certain devices also keep sending HW RF kill interrupt all 1220 * the time, unless the interrupt is ACKed even if the interrupt 1221 * should be masked. Re-ACK all the interrupts here. 1222 */ 1223 iwl_disable_interrupts(trans); 1224 1225 /* clear all status bits */ 1226 clear_bit(STATUS_SYNC_HCMD_ACTIVE, &trans->status); 1227 clear_bit(STATUS_INT_ENABLED, &trans->status); 1228 clear_bit(STATUS_TPOWER_PMI, &trans->status); 1229 1230 /* 1231 * Even if we stop the HW, we still want the RF kill 1232 * interrupt 1233 */ 1234 iwl_enable_rfkill_int(trans); 1235 1236 /* re-take ownership to prevent other users from stealing the device */ 1237 iwl_pcie_prepare_card_hw(trans); 1238 } 1239 1240 void iwl_pcie_synchronize_irqs(struct iwl_trans *trans) 1241 { 1242 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); 1243 1244 if (trans_pcie->msix_enabled) { 1245 int i; 1246 1247 for (i = 0; i < trans_pcie->alloc_vecs; i++) 1248 synchronize_irq(trans_pcie->msix_entries[i].vector); 1249 } else { 1250 synchronize_irq(trans_pcie->pci_dev->irq); 1251 } 1252 } 1253 1254 static int iwl_trans_pcie_start_fw(struct iwl_trans *trans, 1255 const struct fw_img *fw, bool run_in_rfkill) 1256 { 1257 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); 1258 bool hw_rfkill; 1259 int ret; 1260 1261 /* This may fail if AMT took ownership of the device */ 1262 if (iwl_pcie_prepare_card_hw(trans)) { 1263 IWL_WARN(trans, "Exit HW not ready\n"); 1264 ret = -EIO; 1265 goto out; 1266 } 1267 1268 iwl_enable_rfkill_int(trans); 1269 1270 iwl_write32(trans, CSR_INT, 0xFFFFFFFF); 1271 1272 /* 1273 * We enabled the RF-Kill interrupt and the handler may very 1274 * well be running. Disable the interrupts to make sure no other 1275 * interrupt can be fired. 1276 */ 1277 iwl_disable_interrupts(trans); 1278 1279 /* Make sure it finished running */ 1280 iwl_pcie_synchronize_irqs(trans); 1281 1282 mutex_lock(&trans_pcie->mutex); 1283 1284 /* If platform's RF_KILL switch is NOT set to KILL */ 1285 hw_rfkill = iwl_pcie_check_hw_rf_kill(trans); 1286 if (hw_rfkill && !run_in_rfkill) { 1287 ret = -ERFKILL; 1288 goto out; 1289 } 1290 1291 /* Someone called stop_device, don't try to start_fw */ 1292 if (trans_pcie->is_down) { 1293 IWL_WARN(trans, 1294 "Can't start_fw since the HW hasn't been started\n"); 1295 ret = -EIO; 1296 goto out; 1297 } 1298 1299 /* make sure rfkill handshake bits are cleared */ 1300 iwl_write32(trans, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL); 1301 iwl_write32(trans, CSR_UCODE_DRV_GP1_CLR, 1302 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED); 1303 1304 /* clear (again), then enable host interrupts */ 1305 iwl_write32(trans, CSR_INT, 0xFFFFFFFF); 1306 1307 ret = iwl_pcie_nic_init(trans); 1308 if (ret) { 1309 IWL_ERR(trans, "Unable to init nic\n"); 1310 goto out; 1311 } 1312 1313 /* 1314 * Now, we load the firmware and don't want to be interrupted, even 1315 * by the RF-Kill interrupt (hence mask all the interrupt besides the 1316 * FH_TX interrupt which is needed to load the firmware). If the 1317 * RF-Kill switch is toggled, we will find out after having loaded 1318 * the firmware and return the proper value to the caller. 1319 */ 1320 iwl_enable_fw_load_int(trans); 1321 1322 /* really make sure rfkill handshake bits are cleared */ 1323 iwl_write32(trans, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL); 1324 iwl_write32(trans, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL); 1325 1326 /* Load the given image to the HW */ 1327 if (trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_8000) 1328 ret = iwl_pcie_load_given_ucode_8000(trans, fw); 1329 else 1330 ret = iwl_pcie_load_given_ucode(trans, fw); 1331 1332 /* re-check RF-Kill state since we may have missed the interrupt */ 1333 hw_rfkill = iwl_pcie_check_hw_rf_kill(trans); 1334 if (hw_rfkill && !run_in_rfkill) 1335 ret = -ERFKILL; 1336 1337 out: 1338 mutex_unlock(&trans_pcie->mutex); 1339 return ret; 1340 } 1341 1342 static void iwl_trans_pcie_fw_alive(struct iwl_trans *trans, u32 scd_addr) 1343 { 1344 iwl_pcie_reset_ict(trans); 1345 iwl_pcie_tx_start(trans, scd_addr); 1346 } 1347 1348 void iwl_trans_pcie_handle_stop_rfkill(struct iwl_trans *trans, 1349 bool was_in_rfkill) 1350 { 1351 bool hw_rfkill; 1352 1353 /* 1354 * Check again since the RF kill state may have changed while 1355 * all the interrupts were disabled, in this case we couldn't 1356 * receive the RF kill interrupt and update the state in the 1357 * op_mode. 1358 * Don't call the op_mode if the rkfill state hasn't changed. 1359 * This allows the op_mode to call stop_device from the rfkill 1360 * notification without endless recursion. Under very rare 1361 * circumstances, we might have a small recursion if the rfkill 1362 * state changed exactly now while we were called from stop_device. 1363 * This is very unlikely but can happen and is supported. 1364 */ 1365 hw_rfkill = iwl_is_rfkill_set(trans); 1366 if (hw_rfkill) { 1367 set_bit(STATUS_RFKILL_HW, &trans->status); 1368 set_bit(STATUS_RFKILL_OPMODE, &trans->status); 1369 } else { 1370 clear_bit(STATUS_RFKILL_HW, &trans->status); 1371 clear_bit(STATUS_RFKILL_OPMODE, &trans->status); 1372 } 1373 if (hw_rfkill != was_in_rfkill) 1374 iwl_trans_pcie_rf_kill(trans, hw_rfkill); 1375 } 1376 1377 static void iwl_trans_pcie_stop_device(struct iwl_trans *trans) 1378 { 1379 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); 1380 bool was_in_rfkill; 1381 1382 iwl_op_mode_time_point(trans->op_mode, 1383 IWL_FW_INI_TIME_POINT_HOST_DEVICE_DISABLE, 1384 NULL); 1385 1386 mutex_lock(&trans_pcie->mutex); 1387 trans_pcie->opmode_down = true; 1388 was_in_rfkill = test_bit(STATUS_RFKILL_OPMODE, &trans->status); 1389 _iwl_trans_pcie_stop_device(trans); 1390 iwl_trans_pcie_handle_stop_rfkill(trans, was_in_rfkill); 1391 mutex_unlock(&trans_pcie->mutex); 1392 } 1393 1394 void iwl_trans_pcie_rf_kill(struct iwl_trans *trans, bool state) 1395 { 1396 struct iwl_trans_pcie __maybe_unused *trans_pcie = 1397 IWL_TRANS_GET_PCIE_TRANS(trans); 1398 1399 lockdep_assert_held(&trans_pcie->mutex); 1400 1401 IWL_WARN(trans, "reporting RF_KILL (radio %s)\n", 1402 state ? "disabled" : "enabled"); 1403 if (iwl_op_mode_hw_rf_kill(trans->op_mode, state)) { 1404 if (trans->trans_cfg->gen2) 1405 _iwl_trans_pcie_gen2_stop_device(trans); 1406 else 1407 _iwl_trans_pcie_stop_device(trans); 1408 } 1409 } 1410 1411 void iwl_pcie_d3_complete_suspend(struct iwl_trans *trans, 1412 bool test, bool reset) 1413 { 1414 iwl_disable_interrupts(trans); 1415 1416 /* 1417 * in testing mode, the host stays awake and the 1418 * hardware won't be reset (not even partially) 1419 */ 1420 if (test) 1421 return; 1422 1423 iwl_pcie_disable_ict(trans); 1424 1425 iwl_pcie_synchronize_irqs(trans); 1426 1427 iwl_clear_bit(trans, CSR_GP_CNTRL, 1428 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ); 1429 iwl_clear_bit(trans, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE); 1430 1431 if (reset) { 1432 /* 1433 * reset TX queues -- some of their registers reset during S3 1434 * so if we don't reset everything here the D3 image would try 1435 * to execute some invalid memory upon resume 1436 */ 1437 iwl_trans_pcie_tx_reset(trans); 1438 } 1439 1440 iwl_pcie_set_pwr(trans, true); 1441 } 1442 1443 static int iwl_trans_pcie_d3_suspend(struct iwl_trans *trans, bool test, 1444 bool reset) 1445 { 1446 int ret; 1447 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); 1448 1449 if (!reset) 1450 /* Enable persistence mode to avoid reset */ 1451 iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG, 1452 CSR_HW_IF_CONFIG_REG_PERSIST_MODE); 1453 1454 if (trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_AX210) { 1455 iwl_write_umac_prph(trans, UREG_DOORBELL_TO_ISR6, 1456 UREG_DOORBELL_TO_ISR6_SUSPEND); 1457 1458 ret = wait_event_timeout(trans_pcie->sx_waitq, 1459 trans_pcie->sx_complete, 2 * HZ); 1460 /* 1461 * Invalidate it toward resume. 1462 */ 1463 trans_pcie->sx_complete = false; 1464 1465 if (!ret) { 1466 IWL_ERR(trans, "Timeout entering D3\n"); 1467 return -ETIMEDOUT; 1468 } 1469 } 1470 iwl_pcie_d3_complete_suspend(trans, test, reset); 1471 1472 return 0; 1473 } 1474 1475 static int iwl_trans_pcie_d3_resume(struct iwl_trans *trans, 1476 enum iwl_d3_status *status, 1477 bool test, bool reset) 1478 { 1479 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); 1480 u32 val; 1481 int ret; 1482 1483 if (test) { 1484 iwl_enable_interrupts(trans); 1485 *status = IWL_D3_STATUS_ALIVE; 1486 goto out; 1487 } 1488 1489 iwl_set_bit(trans, CSR_GP_CNTRL, 1490 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ); 1491 1492 ret = iwl_finish_nic_init(trans, trans->trans_cfg); 1493 if (ret) 1494 return ret; 1495 1496 /* 1497 * Reconfigure IVAR table in case of MSIX or reset ict table in 1498 * MSI mode since HW reset erased it. 1499 * Also enables interrupts - none will happen as 1500 * the device doesn't know we're waking it up, only when 1501 * the opmode actually tells it after this call. 1502 */ 1503 iwl_pcie_conf_msix_hw(trans_pcie); 1504 if (!trans_pcie->msix_enabled) 1505 iwl_pcie_reset_ict(trans); 1506 iwl_enable_interrupts(trans); 1507 1508 iwl_pcie_set_pwr(trans, false); 1509 1510 if (!reset) { 1511 iwl_clear_bit(trans, CSR_GP_CNTRL, 1512 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ); 1513 } else { 1514 iwl_trans_pcie_tx_reset(trans); 1515 1516 ret = iwl_pcie_rx_init(trans); 1517 if (ret) { 1518 IWL_ERR(trans, 1519 "Failed to resume the device (RX reset)\n"); 1520 return ret; 1521 } 1522 } 1523 1524 IWL_DEBUG_POWER(trans, "WFPM value upon resume = 0x%08X\n", 1525 iwl_read_umac_prph(trans, WFPM_GP2)); 1526 1527 val = iwl_read32(trans, CSR_RESET); 1528 if (val & CSR_RESET_REG_FLAG_NEVO_RESET) 1529 *status = IWL_D3_STATUS_RESET; 1530 else 1531 *status = IWL_D3_STATUS_ALIVE; 1532 1533 out: 1534 if (*status == IWL_D3_STATUS_ALIVE && 1535 trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_AX210) { 1536 trans_pcie->sx_complete = false; 1537 iwl_write_umac_prph(trans, UREG_DOORBELL_TO_ISR6, 1538 UREG_DOORBELL_TO_ISR6_RESUME); 1539 1540 ret = wait_event_timeout(trans_pcie->sx_waitq, 1541 trans_pcie->sx_complete, 2 * HZ); 1542 /* 1543 * Invalidate it toward next suspend. 1544 */ 1545 trans_pcie->sx_complete = false; 1546 1547 if (!ret) { 1548 IWL_ERR(trans, "Timeout exiting D3\n"); 1549 return -ETIMEDOUT; 1550 } 1551 } 1552 return 0; 1553 } 1554 1555 static void 1556 iwl_pcie_set_interrupt_capa(struct pci_dev *pdev, 1557 struct iwl_trans *trans, 1558 const struct iwl_cfg_trans_params *cfg_trans) 1559 { 1560 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); 1561 int max_irqs, num_irqs, i, ret; 1562 u16 pci_cmd; 1563 u32 max_rx_queues = IWL_MAX_RX_HW_QUEUES; 1564 1565 if (!cfg_trans->mq_rx_supported) 1566 goto enable_msi; 1567 1568 if (cfg_trans->device_family <= IWL_DEVICE_FAMILY_9000) 1569 max_rx_queues = IWL_9000_MAX_RX_HW_QUEUES; 1570 1571 max_irqs = min_t(u32, num_online_cpus() + 2, max_rx_queues); 1572 for (i = 0; i < max_irqs; i++) 1573 trans_pcie->msix_entries[i].entry = i; 1574 1575 num_irqs = pci_enable_msix_range(pdev, trans_pcie->msix_entries, 1576 MSIX_MIN_INTERRUPT_VECTORS, 1577 max_irqs); 1578 if (num_irqs < 0) { 1579 IWL_DEBUG_INFO(trans, 1580 "Failed to enable msi-x mode (ret %d). Moving to msi mode.\n", 1581 num_irqs); 1582 goto enable_msi; 1583 } 1584 trans_pcie->def_irq = (num_irqs == max_irqs) ? num_irqs - 1 : 0; 1585 1586 IWL_DEBUG_INFO(trans, 1587 "MSI-X enabled. %d interrupt vectors were allocated\n", 1588 num_irqs); 1589 1590 /* 1591 * In case the OS provides fewer interrupts than requested, different 1592 * causes will share the same interrupt vector as follows: 1593 * One interrupt less: non rx causes shared with FBQ. 1594 * Two interrupts less: non rx causes shared with FBQ and RSS. 1595 * More than two interrupts: we will use fewer RSS queues. 1596 */ 1597 if (num_irqs <= max_irqs - 2) { 1598 trans_pcie->trans->num_rx_queues = num_irqs + 1; 1599 trans_pcie->shared_vec_mask = IWL_SHARED_IRQ_NON_RX | 1600 IWL_SHARED_IRQ_FIRST_RSS; 1601 } else if (num_irqs == max_irqs - 1) { 1602 trans_pcie->trans->num_rx_queues = num_irqs; 1603 trans_pcie->shared_vec_mask = IWL_SHARED_IRQ_NON_RX; 1604 } else { 1605 trans_pcie->trans->num_rx_queues = num_irqs - 1; 1606 } 1607 1608 IWL_DEBUG_INFO(trans, 1609 "MSI-X enabled with rx queues %d, vec mask 0x%x\n", 1610 trans_pcie->trans->num_rx_queues, trans_pcie->shared_vec_mask); 1611 1612 WARN_ON(trans_pcie->trans->num_rx_queues > IWL_MAX_RX_HW_QUEUES); 1613 1614 trans_pcie->alloc_vecs = num_irqs; 1615 trans_pcie->msix_enabled = true; 1616 return; 1617 1618 enable_msi: 1619 ret = pci_enable_msi(pdev); 1620 if (ret) { 1621 dev_err(&pdev->dev, "pci_enable_msi failed - %d\n", ret); 1622 /* enable rfkill interrupt: hw bug w/a */ 1623 pci_read_config_word(pdev, PCI_COMMAND, &pci_cmd); 1624 if (pci_cmd & PCI_COMMAND_INTX_DISABLE) { 1625 pci_cmd &= ~PCI_COMMAND_INTX_DISABLE; 1626 pci_write_config_word(pdev, PCI_COMMAND, pci_cmd); 1627 } 1628 } 1629 } 1630 1631 static void iwl_pcie_irq_set_affinity(struct iwl_trans *trans) 1632 { 1633 int iter_rx_q, i, ret, cpu, offset; 1634 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); 1635 1636 i = trans_pcie->shared_vec_mask & IWL_SHARED_IRQ_FIRST_RSS ? 0 : 1; 1637 iter_rx_q = trans_pcie->trans->num_rx_queues - 1 + i; 1638 offset = 1 + i; 1639 for (; i < iter_rx_q ; i++) { 1640 /* 1641 * Get the cpu prior to the place to search 1642 * (i.e. return will be > i - 1). 1643 */ 1644 cpu = cpumask_next(i - offset, cpu_online_mask); 1645 cpumask_set_cpu(cpu, &trans_pcie->affinity_mask[i]); 1646 ret = irq_set_affinity_hint(trans_pcie->msix_entries[i].vector, 1647 &trans_pcie->affinity_mask[i]); 1648 if (ret) 1649 IWL_ERR(trans_pcie->trans, 1650 "Failed to set affinity mask for IRQ %d\n", 1651 i); 1652 } 1653 } 1654 1655 static int iwl_pcie_init_msix_handler(struct pci_dev *pdev, 1656 struct iwl_trans_pcie *trans_pcie) 1657 { 1658 int i; 1659 1660 for (i = 0; i < trans_pcie->alloc_vecs; i++) { 1661 int ret; 1662 struct msix_entry *msix_entry; 1663 const char *qname = queue_name(&pdev->dev, trans_pcie, i); 1664 1665 if (!qname) 1666 return -ENOMEM; 1667 1668 msix_entry = &trans_pcie->msix_entries[i]; 1669 ret = devm_request_threaded_irq(&pdev->dev, 1670 msix_entry->vector, 1671 iwl_pcie_msix_isr, 1672 (i == trans_pcie->def_irq) ? 1673 iwl_pcie_irq_msix_handler : 1674 iwl_pcie_irq_rx_msix_handler, 1675 IRQF_SHARED, 1676 qname, 1677 msix_entry); 1678 if (ret) { 1679 IWL_ERR(trans_pcie->trans, 1680 "Error allocating IRQ %d\n", i); 1681 1682 return ret; 1683 } 1684 } 1685 iwl_pcie_irq_set_affinity(trans_pcie->trans); 1686 1687 return 0; 1688 } 1689 1690 static int iwl_trans_pcie_clear_persistence_bit(struct iwl_trans *trans) 1691 { 1692 u32 hpm, wprot; 1693 1694 switch (trans->trans_cfg->device_family) { 1695 case IWL_DEVICE_FAMILY_9000: 1696 wprot = PREG_PRPH_WPROT_9000; 1697 break; 1698 case IWL_DEVICE_FAMILY_22000: 1699 wprot = PREG_PRPH_WPROT_22000; 1700 break; 1701 default: 1702 return 0; 1703 } 1704 1705 hpm = iwl_read_umac_prph_no_grab(trans, HPM_DEBUG); 1706 if (hpm != 0xa5a5a5a0 && (hpm & PERSISTENCE_BIT)) { 1707 u32 wprot_val = iwl_read_umac_prph_no_grab(trans, wprot); 1708 1709 if (wprot_val & PREG_WFPM_ACCESS) { 1710 IWL_ERR(trans, 1711 "Error, can not clear persistence bit\n"); 1712 return -EPERM; 1713 } 1714 iwl_write_umac_prph_no_grab(trans, HPM_DEBUG, 1715 hpm & ~PERSISTENCE_BIT); 1716 } 1717 1718 return 0; 1719 } 1720 1721 static int iwl_pcie_gen2_force_power_gating(struct iwl_trans *trans) 1722 { 1723 int ret; 1724 1725 ret = iwl_finish_nic_init(trans, trans->trans_cfg); 1726 if (ret < 0) 1727 return ret; 1728 1729 iwl_set_bits_prph(trans, HPM_HIPM_GEN_CFG, 1730 HPM_HIPM_GEN_CFG_CR_FORCE_ACTIVE); 1731 udelay(20); 1732 iwl_set_bits_prph(trans, HPM_HIPM_GEN_CFG, 1733 HPM_HIPM_GEN_CFG_CR_PG_EN | 1734 HPM_HIPM_GEN_CFG_CR_SLP_EN); 1735 udelay(20); 1736 iwl_clear_bits_prph(trans, HPM_HIPM_GEN_CFG, 1737 HPM_HIPM_GEN_CFG_CR_FORCE_ACTIVE); 1738 1739 iwl_trans_pcie_sw_reset(trans); 1740 1741 return 0; 1742 } 1743 1744 static int _iwl_trans_pcie_start_hw(struct iwl_trans *trans) 1745 { 1746 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); 1747 int err; 1748 1749 lockdep_assert_held(&trans_pcie->mutex); 1750 1751 err = iwl_pcie_prepare_card_hw(trans); 1752 if (err) { 1753 IWL_ERR(trans, "Error while preparing HW: %d\n", err); 1754 return err; 1755 } 1756 1757 err = iwl_trans_pcie_clear_persistence_bit(trans); 1758 if (err) 1759 return err; 1760 1761 iwl_trans_pcie_sw_reset(trans); 1762 1763 if (trans->trans_cfg->device_family == IWL_DEVICE_FAMILY_22000 && 1764 trans->trans_cfg->integrated) { 1765 err = iwl_pcie_gen2_force_power_gating(trans); 1766 if (err) 1767 return err; 1768 } 1769 1770 err = iwl_pcie_apm_init(trans); 1771 if (err) 1772 return err; 1773 1774 iwl_pcie_init_msix(trans_pcie); 1775 1776 /* From now on, the op_mode will be kept updated about RF kill state */ 1777 iwl_enable_rfkill_int(trans); 1778 1779 trans_pcie->opmode_down = false; 1780 1781 /* Set is_down to false here so that...*/ 1782 trans_pcie->is_down = false; 1783 1784 /* ...rfkill can call stop_device and set it false if needed */ 1785 iwl_pcie_check_hw_rf_kill(trans); 1786 1787 return 0; 1788 } 1789 1790 static int iwl_trans_pcie_start_hw(struct iwl_trans *trans) 1791 { 1792 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); 1793 int ret; 1794 1795 mutex_lock(&trans_pcie->mutex); 1796 ret = _iwl_trans_pcie_start_hw(trans); 1797 mutex_unlock(&trans_pcie->mutex); 1798 1799 return ret; 1800 } 1801 1802 static void iwl_trans_pcie_op_mode_leave(struct iwl_trans *trans) 1803 { 1804 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); 1805 1806 mutex_lock(&trans_pcie->mutex); 1807 1808 /* disable interrupts - don't enable HW RF kill interrupt */ 1809 iwl_disable_interrupts(trans); 1810 1811 iwl_pcie_apm_stop(trans, true); 1812 1813 iwl_disable_interrupts(trans); 1814 1815 iwl_pcie_disable_ict(trans); 1816 1817 mutex_unlock(&trans_pcie->mutex); 1818 1819 iwl_pcie_synchronize_irqs(trans); 1820 } 1821 1822 static void iwl_trans_pcie_write8(struct iwl_trans *trans, u32 ofs, u8 val) 1823 { 1824 writeb(val, IWL_TRANS_GET_PCIE_TRANS(trans)->hw_base + ofs); 1825 } 1826 1827 static void iwl_trans_pcie_write32(struct iwl_trans *trans, u32 ofs, u32 val) 1828 { 1829 writel(val, IWL_TRANS_GET_PCIE_TRANS(trans)->hw_base + ofs); 1830 } 1831 1832 static u32 iwl_trans_pcie_read32(struct iwl_trans *trans, u32 ofs) 1833 { 1834 return readl(IWL_TRANS_GET_PCIE_TRANS(trans)->hw_base + ofs); 1835 } 1836 1837 static u32 iwl_trans_pcie_prph_msk(struct iwl_trans *trans) 1838 { 1839 if (trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_AX210) 1840 return 0x00FFFFFF; 1841 else 1842 return 0x000FFFFF; 1843 } 1844 1845 static u32 iwl_trans_pcie_read_prph(struct iwl_trans *trans, u32 reg) 1846 { 1847 u32 mask = iwl_trans_pcie_prph_msk(trans); 1848 1849 iwl_trans_pcie_write32(trans, HBUS_TARG_PRPH_RADDR, 1850 ((reg & mask) | (3 << 24))); 1851 return iwl_trans_pcie_read32(trans, HBUS_TARG_PRPH_RDAT); 1852 } 1853 1854 static void iwl_trans_pcie_write_prph(struct iwl_trans *trans, u32 addr, 1855 u32 val) 1856 { 1857 u32 mask = iwl_trans_pcie_prph_msk(trans); 1858 1859 iwl_trans_pcie_write32(trans, HBUS_TARG_PRPH_WADDR, 1860 ((addr & mask) | (3 << 24))); 1861 iwl_trans_pcie_write32(trans, HBUS_TARG_PRPH_WDAT, val); 1862 } 1863 1864 static void iwl_trans_pcie_configure(struct iwl_trans *trans, 1865 const struct iwl_trans_config *trans_cfg) 1866 { 1867 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); 1868 1869 trans->txqs.cmd.q_id = trans_cfg->cmd_queue; 1870 trans->txqs.cmd.fifo = trans_cfg->cmd_fifo; 1871 trans->txqs.cmd.wdg_timeout = trans_cfg->cmd_q_wdg_timeout; 1872 trans->txqs.page_offs = trans_cfg->cb_data_offs; 1873 trans->txqs.dev_cmd_offs = trans_cfg->cb_data_offs + sizeof(void *); 1874 1875 if (WARN_ON(trans_cfg->n_no_reclaim_cmds > MAX_NO_RECLAIM_CMDS)) 1876 trans_pcie->n_no_reclaim_cmds = 0; 1877 else 1878 trans_pcie->n_no_reclaim_cmds = trans_cfg->n_no_reclaim_cmds; 1879 if (trans_pcie->n_no_reclaim_cmds) 1880 memcpy(trans_pcie->no_reclaim_cmds, trans_cfg->no_reclaim_cmds, 1881 trans_pcie->n_no_reclaim_cmds * sizeof(u8)); 1882 1883 trans_pcie->rx_buf_size = trans_cfg->rx_buf_size; 1884 trans_pcie->rx_page_order = 1885 iwl_trans_get_rb_size_order(trans_pcie->rx_buf_size); 1886 trans_pcie->rx_buf_bytes = 1887 iwl_trans_get_rb_size(trans_pcie->rx_buf_size); 1888 trans_pcie->supported_dma_mask = DMA_BIT_MASK(12); 1889 if (trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_AX210) 1890 trans_pcie->supported_dma_mask = DMA_BIT_MASK(11); 1891 1892 trans->txqs.bc_table_dword = trans_cfg->bc_table_dword; 1893 trans_pcie->scd_set_active = trans_cfg->scd_set_active; 1894 1895 trans->command_groups = trans_cfg->command_groups; 1896 trans->command_groups_size = trans_cfg->command_groups_size; 1897 1898 /* Initialize NAPI here - it should be before registering to mac80211 1899 * in the opmode but after the HW struct is allocated. 1900 * As this function may be called again in some corner cases don't 1901 * do anything if NAPI was already initialized. 1902 */ 1903 if (trans_pcie->napi_dev.reg_state != NETREG_DUMMY) 1904 init_dummy_netdev(&trans_pcie->napi_dev); 1905 1906 trans_pcie->fw_reset_handshake = trans_cfg->fw_reset_handshake; 1907 } 1908 1909 void iwl_trans_pcie_free(struct iwl_trans *trans) 1910 { 1911 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); 1912 int i; 1913 1914 iwl_pcie_synchronize_irqs(trans); 1915 1916 if (trans->trans_cfg->gen2) 1917 iwl_txq_gen2_tx_free(trans); 1918 else 1919 iwl_pcie_tx_free(trans); 1920 iwl_pcie_rx_free(trans); 1921 1922 if (trans_pcie->rba.alloc_wq) { 1923 destroy_workqueue(trans_pcie->rba.alloc_wq); 1924 trans_pcie->rba.alloc_wq = NULL; 1925 } 1926 1927 if (trans_pcie->msix_enabled) { 1928 for (i = 0; i < trans_pcie->alloc_vecs; i++) { 1929 irq_set_affinity_hint( 1930 trans_pcie->msix_entries[i].vector, 1931 NULL); 1932 } 1933 1934 trans_pcie->msix_enabled = false; 1935 } else { 1936 iwl_pcie_free_ict(trans); 1937 } 1938 1939 iwl_pcie_free_fw_monitor(trans); 1940 1941 if (trans_pcie->pnvm_dram.size) 1942 dma_free_coherent(trans->dev, trans_pcie->pnvm_dram.size, 1943 trans_pcie->pnvm_dram.block, 1944 trans_pcie->pnvm_dram.physical); 1945 1946 mutex_destroy(&trans_pcie->mutex); 1947 iwl_trans_free(trans); 1948 } 1949 1950 static void iwl_trans_pcie_set_pmi(struct iwl_trans *trans, bool state) 1951 { 1952 if (state) 1953 set_bit(STATUS_TPOWER_PMI, &trans->status); 1954 else 1955 clear_bit(STATUS_TPOWER_PMI, &trans->status); 1956 } 1957 1958 struct iwl_trans_pcie_removal { 1959 struct pci_dev *pdev; 1960 struct work_struct work; 1961 }; 1962 1963 static void iwl_trans_pcie_removal_wk(struct work_struct *wk) 1964 { 1965 struct iwl_trans_pcie_removal *removal = 1966 container_of(wk, struct iwl_trans_pcie_removal, work); 1967 struct pci_dev *pdev = removal->pdev; 1968 static char *prop[] = {"EVENT=INACCESSIBLE", NULL}; 1969 1970 dev_err(&pdev->dev, "Device gone - attempting removal\n"); 1971 kobject_uevent_env(&pdev->dev.kobj, KOBJ_CHANGE, prop); 1972 pci_lock_rescan_remove(); 1973 pci_dev_put(pdev); 1974 pci_stop_and_remove_bus_device(pdev); 1975 pci_unlock_rescan_remove(); 1976 1977 kfree(removal); 1978 module_put(THIS_MODULE); 1979 } 1980 1981 /* 1982 * This version doesn't disable BHs but rather assumes they're 1983 * already disabled. 1984 */ 1985 bool __iwl_trans_pcie_grab_nic_access(struct iwl_trans *trans) 1986 { 1987 int ret; 1988 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); 1989 1990 spin_lock(&trans_pcie->reg_lock); 1991 1992 if (trans_pcie->cmd_hold_nic_awake) 1993 goto out; 1994 1995 /* this bit wakes up the NIC */ 1996 __iwl_trans_pcie_set_bit(trans, CSR_GP_CNTRL, 1997 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ); 1998 if (trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_8000) 1999 udelay(2); 2000 2001 /* 2002 * These bits say the device is running, and should keep running for 2003 * at least a short while (at least as long as MAC_ACCESS_REQ stays 1), 2004 * but they do not indicate that embedded SRAM is restored yet; 2005 * HW with volatile SRAM must save/restore contents to/from 2006 * host DRAM when sleeping/waking for power-saving. 2007 * Each direction takes approximately 1/4 millisecond; with this 2008 * overhead, it's a good idea to grab and hold MAC_ACCESS_REQUEST if a 2009 * series of register accesses are expected (e.g. reading Event Log), 2010 * to keep device from sleeping. 2011 * 2012 * CSR_UCODE_DRV_GP1 register bit MAC_SLEEP == 0 indicates that 2013 * SRAM is okay/restored. We don't check that here because this call 2014 * is just for hardware register access; but GP1 MAC_SLEEP 2015 * check is a good idea before accessing the SRAM of HW with 2016 * volatile SRAM (e.g. reading Event Log). 2017 * 2018 * 5000 series and later (including 1000 series) have non-volatile SRAM, 2019 * and do not save/restore SRAM when power cycling. 2020 */ 2021 ret = iwl_poll_bit(trans, CSR_GP_CNTRL, 2022 CSR_GP_CNTRL_REG_VAL_MAC_ACCESS_EN, 2023 (CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY | 2024 CSR_GP_CNTRL_REG_FLAG_GOING_TO_SLEEP), 15000); 2025 if (unlikely(ret < 0)) { 2026 u32 cntrl = iwl_read32(trans, CSR_GP_CNTRL); 2027 2028 WARN_ONCE(1, 2029 "Timeout waiting for hardware access (CSR_GP_CNTRL 0x%08x)\n", 2030 cntrl); 2031 2032 iwl_trans_pcie_dump_regs(trans); 2033 2034 if (iwlwifi_mod_params.remove_when_gone && cntrl == ~0U) { 2035 struct iwl_trans_pcie_removal *removal; 2036 2037 if (test_bit(STATUS_TRANS_DEAD, &trans->status)) 2038 goto err; 2039 2040 IWL_ERR(trans, "Device gone - scheduling removal!\n"); 2041 2042 /* 2043 * get a module reference to avoid doing this 2044 * while unloading anyway and to avoid 2045 * scheduling a work with code that's being 2046 * removed. 2047 */ 2048 if (!try_module_get(THIS_MODULE)) { 2049 IWL_ERR(trans, 2050 "Module is being unloaded - abort\n"); 2051 goto err; 2052 } 2053 2054 removal = kzalloc(sizeof(*removal), GFP_ATOMIC); 2055 if (!removal) { 2056 module_put(THIS_MODULE); 2057 goto err; 2058 } 2059 /* 2060 * we don't need to clear this flag, because 2061 * the trans will be freed and reallocated. 2062 */ 2063 set_bit(STATUS_TRANS_DEAD, &trans->status); 2064 2065 removal->pdev = to_pci_dev(trans->dev); 2066 INIT_WORK(&removal->work, iwl_trans_pcie_removal_wk); 2067 pci_dev_get(removal->pdev); 2068 schedule_work(&removal->work); 2069 } else { 2070 iwl_write32(trans, CSR_RESET, 2071 CSR_RESET_REG_FLAG_FORCE_NMI); 2072 } 2073 2074 err: 2075 spin_unlock(&trans_pcie->reg_lock); 2076 return false; 2077 } 2078 2079 out: 2080 /* 2081 * Fool sparse by faking we release the lock - sparse will 2082 * track nic_access anyway. 2083 */ 2084 __release(&trans_pcie->reg_lock); 2085 return true; 2086 } 2087 2088 static bool iwl_trans_pcie_grab_nic_access(struct iwl_trans *trans) 2089 { 2090 bool ret; 2091 2092 local_bh_disable(); 2093 ret = __iwl_trans_pcie_grab_nic_access(trans); 2094 if (ret) { 2095 /* keep BHs disabled until iwl_trans_pcie_release_nic_access */ 2096 return ret; 2097 } 2098 local_bh_enable(); 2099 return false; 2100 } 2101 2102 static void iwl_trans_pcie_release_nic_access(struct iwl_trans *trans) 2103 { 2104 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); 2105 2106 lockdep_assert_held(&trans_pcie->reg_lock); 2107 2108 /* 2109 * Fool sparse by faking we acquiring the lock - sparse will 2110 * track nic_access anyway. 2111 */ 2112 __acquire(&trans_pcie->reg_lock); 2113 2114 if (trans_pcie->cmd_hold_nic_awake) 2115 goto out; 2116 2117 __iwl_trans_pcie_clear_bit(trans, CSR_GP_CNTRL, 2118 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ); 2119 /* 2120 * Above we read the CSR_GP_CNTRL register, which will flush 2121 * any previous writes, but we need the write that clears the 2122 * MAC_ACCESS_REQ bit to be performed before any other writes 2123 * scheduled on different CPUs (after we drop reg_lock). 2124 */ 2125 out: 2126 spin_unlock_bh(&trans_pcie->reg_lock); 2127 } 2128 2129 static int iwl_trans_pcie_read_mem(struct iwl_trans *trans, u32 addr, 2130 void *buf, int dwords) 2131 { 2132 int offs = 0; 2133 u32 *vals = buf; 2134 2135 while (offs < dwords) { 2136 /* limit the time we spin here under lock to 1/2s */ 2137 unsigned long end = jiffies + HZ / 2; 2138 bool resched = false; 2139 2140 if (iwl_trans_grab_nic_access(trans)) { 2141 iwl_write32(trans, HBUS_TARG_MEM_RADDR, 2142 addr + 4 * offs); 2143 2144 while (offs < dwords) { 2145 vals[offs] = iwl_read32(trans, 2146 HBUS_TARG_MEM_RDAT); 2147 offs++; 2148 2149 if (time_after(jiffies, end)) { 2150 resched = true; 2151 break; 2152 } 2153 } 2154 iwl_trans_release_nic_access(trans); 2155 2156 if (resched) 2157 cond_resched(); 2158 } else { 2159 return -EBUSY; 2160 } 2161 } 2162 2163 return 0; 2164 } 2165 2166 static int iwl_trans_pcie_write_mem(struct iwl_trans *trans, u32 addr, 2167 const void *buf, int dwords) 2168 { 2169 int offs, ret = 0; 2170 const u32 *vals = buf; 2171 2172 if (iwl_trans_grab_nic_access(trans)) { 2173 iwl_write32(trans, HBUS_TARG_MEM_WADDR, addr); 2174 for (offs = 0; offs < dwords; offs++) 2175 iwl_write32(trans, HBUS_TARG_MEM_WDAT, 2176 vals ? vals[offs] : 0); 2177 iwl_trans_release_nic_access(trans); 2178 } else { 2179 ret = -EBUSY; 2180 } 2181 return ret; 2182 } 2183 2184 static int iwl_trans_pcie_read_config32(struct iwl_trans *trans, u32 ofs, 2185 u32 *val) 2186 { 2187 return pci_read_config_dword(IWL_TRANS_GET_PCIE_TRANS(trans)->pci_dev, 2188 ofs, val); 2189 } 2190 2191 static void iwl_trans_pcie_block_txq_ptrs(struct iwl_trans *trans, bool block) 2192 { 2193 int i; 2194 2195 for (i = 0; i < trans->trans_cfg->base_params->num_of_queues; i++) { 2196 struct iwl_txq *txq = trans->txqs.txq[i]; 2197 2198 if (i == trans->txqs.cmd.q_id) 2199 continue; 2200 2201 spin_lock_bh(&txq->lock); 2202 2203 if (!block && !(WARN_ON_ONCE(!txq->block))) { 2204 txq->block--; 2205 if (!txq->block) { 2206 iwl_write32(trans, HBUS_TARG_WRPTR, 2207 txq->write_ptr | (i << 8)); 2208 } 2209 } else if (block) { 2210 txq->block++; 2211 } 2212 2213 spin_unlock_bh(&txq->lock); 2214 } 2215 } 2216 2217 #define IWL_FLUSH_WAIT_MS 2000 2218 2219 static int iwl_trans_pcie_rxq_dma_data(struct iwl_trans *trans, int queue, 2220 struct iwl_trans_rxq_dma_data *data) 2221 { 2222 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); 2223 2224 if (queue >= trans->num_rx_queues || !trans_pcie->rxq) 2225 return -EINVAL; 2226 2227 data->fr_bd_cb = trans_pcie->rxq[queue].bd_dma; 2228 data->urbd_stts_wrptr = trans_pcie->rxq[queue].rb_stts_dma; 2229 data->ur_bd_cb = trans_pcie->rxq[queue].used_bd_dma; 2230 data->fr_bd_wid = 0; 2231 2232 return 0; 2233 } 2234 2235 static int iwl_trans_pcie_wait_txq_empty(struct iwl_trans *trans, int txq_idx) 2236 { 2237 struct iwl_txq *txq; 2238 unsigned long now = jiffies; 2239 bool overflow_tx; 2240 u8 wr_ptr; 2241 2242 /* Make sure the NIC is still alive in the bus */ 2243 if (test_bit(STATUS_TRANS_DEAD, &trans->status)) 2244 return -ENODEV; 2245 2246 if (!test_bit(txq_idx, trans->txqs.queue_used)) 2247 return -EINVAL; 2248 2249 IWL_DEBUG_TX_QUEUES(trans, "Emptying queue %d...\n", txq_idx); 2250 txq = trans->txqs.txq[txq_idx]; 2251 2252 spin_lock_bh(&txq->lock); 2253 overflow_tx = txq->overflow_tx || 2254 !skb_queue_empty(&txq->overflow_q); 2255 spin_unlock_bh(&txq->lock); 2256 2257 wr_ptr = READ_ONCE(txq->write_ptr); 2258 2259 while ((txq->read_ptr != READ_ONCE(txq->write_ptr) || 2260 overflow_tx) && 2261 !time_after(jiffies, 2262 now + msecs_to_jiffies(IWL_FLUSH_WAIT_MS))) { 2263 u8 write_ptr = READ_ONCE(txq->write_ptr); 2264 2265 /* 2266 * If write pointer moved during the wait, warn only 2267 * if the TX came from op mode. In case TX came from 2268 * trans layer (overflow TX) don't warn. 2269 */ 2270 if (WARN_ONCE(wr_ptr != write_ptr && !overflow_tx, 2271 "WR pointer moved while flushing %d -> %d\n", 2272 wr_ptr, write_ptr)) 2273 return -ETIMEDOUT; 2274 wr_ptr = write_ptr; 2275 2276 usleep_range(1000, 2000); 2277 2278 spin_lock_bh(&txq->lock); 2279 overflow_tx = txq->overflow_tx || 2280 !skb_queue_empty(&txq->overflow_q); 2281 spin_unlock_bh(&txq->lock); 2282 } 2283 2284 if (txq->read_ptr != txq->write_ptr) { 2285 IWL_ERR(trans, 2286 "fail to flush all tx fifo queues Q %d\n", txq_idx); 2287 iwl_txq_log_scd_error(trans, txq); 2288 return -ETIMEDOUT; 2289 } 2290 2291 IWL_DEBUG_TX_QUEUES(trans, "Queue %d is now empty.\n", txq_idx); 2292 2293 return 0; 2294 } 2295 2296 static int iwl_trans_pcie_wait_txqs_empty(struct iwl_trans *trans, u32 txq_bm) 2297 { 2298 int cnt; 2299 int ret = 0; 2300 2301 /* waiting for all the tx frames complete might take a while */ 2302 for (cnt = 0; 2303 cnt < trans->trans_cfg->base_params->num_of_queues; 2304 cnt++) { 2305 2306 if (cnt == trans->txqs.cmd.q_id) 2307 continue; 2308 if (!test_bit(cnt, trans->txqs.queue_used)) 2309 continue; 2310 if (!(BIT(cnt) & txq_bm)) 2311 continue; 2312 2313 ret = iwl_trans_pcie_wait_txq_empty(trans, cnt); 2314 if (ret) 2315 break; 2316 } 2317 2318 return ret; 2319 } 2320 2321 static void iwl_trans_pcie_set_bits_mask(struct iwl_trans *trans, u32 reg, 2322 u32 mask, u32 value) 2323 { 2324 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); 2325 2326 spin_lock_bh(&trans_pcie->reg_lock); 2327 __iwl_trans_pcie_set_bits_mask(trans, reg, mask, value); 2328 spin_unlock_bh(&trans_pcie->reg_lock); 2329 } 2330 2331 static const char *get_csr_string(int cmd) 2332 { 2333 #define IWL_CMD(x) case x: return #x 2334 switch (cmd) { 2335 IWL_CMD(CSR_HW_IF_CONFIG_REG); 2336 IWL_CMD(CSR_INT_COALESCING); 2337 IWL_CMD(CSR_INT); 2338 IWL_CMD(CSR_INT_MASK); 2339 IWL_CMD(CSR_FH_INT_STATUS); 2340 IWL_CMD(CSR_GPIO_IN); 2341 IWL_CMD(CSR_RESET); 2342 IWL_CMD(CSR_GP_CNTRL); 2343 IWL_CMD(CSR_HW_REV); 2344 IWL_CMD(CSR_EEPROM_REG); 2345 IWL_CMD(CSR_EEPROM_GP); 2346 IWL_CMD(CSR_OTP_GP_REG); 2347 IWL_CMD(CSR_GIO_REG); 2348 IWL_CMD(CSR_GP_UCODE_REG); 2349 IWL_CMD(CSR_GP_DRIVER_REG); 2350 IWL_CMD(CSR_UCODE_DRV_GP1); 2351 IWL_CMD(CSR_UCODE_DRV_GP2); 2352 IWL_CMD(CSR_LED_REG); 2353 IWL_CMD(CSR_DRAM_INT_TBL_REG); 2354 IWL_CMD(CSR_GIO_CHICKEN_BITS); 2355 IWL_CMD(CSR_ANA_PLL_CFG); 2356 IWL_CMD(CSR_HW_REV_WA_REG); 2357 IWL_CMD(CSR_MONITOR_STATUS_REG); 2358 IWL_CMD(CSR_DBG_HPET_MEM_REG); 2359 default: 2360 return "UNKNOWN"; 2361 } 2362 #undef IWL_CMD 2363 } 2364 2365 void iwl_pcie_dump_csr(struct iwl_trans *trans) 2366 { 2367 int i; 2368 static const u32 csr_tbl[] = { 2369 CSR_HW_IF_CONFIG_REG, 2370 CSR_INT_COALESCING, 2371 CSR_INT, 2372 CSR_INT_MASK, 2373 CSR_FH_INT_STATUS, 2374 CSR_GPIO_IN, 2375 CSR_RESET, 2376 CSR_GP_CNTRL, 2377 CSR_HW_REV, 2378 CSR_EEPROM_REG, 2379 CSR_EEPROM_GP, 2380 CSR_OTP_GP_REG, 2381 CSR_GIO_REG, 2382 CSR_GP_UCODE_REG, 2383 CSR_GP_DRIVER_REG, 2384 CSR_UCODE_DRV_GP1, 2385 CSR_UCODE_DRV_GP2, 2386 CSR_LED_REG, 2387 CSR_DRAM_INT_TBL_REG, 2388 CSR_GIO_CHICKEN_BITS, 2389 CSR_ANA_PLL_CFG, 2390 CSR_MONITOR_STATUS_REG, 2391 CSR_HW_REV_WA_REG, 2392 CSR_DBG_HPET_MEM_REG 2393 }; 2394 IWL_ERR(trans, "CSR values:\n"); 2395 IWL_ERR(trans, "(2nd byte of CSR_INT_COALESCING is " 2396 "CSR_INT_PERIODIC_REG)\n"); 2397 for (i = 0; i < ARRAY_SIZE(csr_tbl); i++) { 2398 IWL_ERR(trans, " %25s: 0X%08x\n", 2399 get_csr_string(csr_tbl[i]), 2400 iwl_read32(trans, csr_tbl[i])); 2401 } 2402 } 2403 2404 #ifdef CONFIG_IWLWIFI_DEBUGFS 2405 /* create and remove of files */ 2406 #define DEBUGFS_ADD_FILE(name, parent, mode) do { \ 2407 debugfs_create_file(#name, mode, parent, trans, \ 2408 &iwl_dbgfs_##name##_ops); \ 2409 } while (0) 2410 2411 /* file operation */ 2412 #define DEBUGFS_READ_FILE_OPS(name) \ 2413 static const struct file_operations iwl_dbgfs_##name##_ops = { \ 2414 .read = iwl_dbgfs_##name##_read, \ 2415 .open = simple_open, \ 2416 .llseek = generic_file_llseek, \ 2417 }; 2418 2419 #define DEBUGFS_WRITE_FILE_OPS(name) \ 2420 static const struct file_operations iwl_dbgfs_##name##_ops = { \ 2421 .write = iwl_dbgfs_##name##_write, \ 2422 .open = simple_open, \ 2423 .llseek = generic_file_llseek, \ 2424 }; 2425 2426 #define DEBUGFS_READ_WRITE_FILE_OPS(name) \ 2427 static const struct file_operations iwl_dbgfs_##name##_ops = { \ 2428 .write = iwl_dbgfs_##name##_write, \ 2429 .read = iwl_dbgfs_##name##_read, \ 2430 .open = simple_open, \ 2431 .llseek = generic_file_llseek, \ 2432 }; 2433 2434 struct iwl_dbgfs_tx_queue_priv { 2435 struct iwl_trans *trans; 2436 }; 2437 2438 struct iwl_dbgfs_tx_queue_state { 2439 loff_t pos; 2440 }; 2441 2442 static void *iwl_dbgfs_tx_queue_seq_start(struct seq_file *seq, loff_t *pos) 2443 { 2444 struct iwl_dbgfs_tx_queue_priv *priv = seq->private; 2445 struct iwl_dbgfs_tx_queue_state *state; 2446 2447 if (*pos >= priv->trans->trans_cfg->base_params->num_of_queues) 2448 return NULL; 2449 2450 state = kmalloc(sizeof(*state), GFP_KERNEL); 2451 if (!state) 2452 return NULL; 2453 state->pos = *pos; 2454 return state; 2455 } 2456 2457 static void *iwl_dbgfs_tx_queue_seq_next(struct seq_file *seq, 2458 void *v, loff_t *pos) 2459 { 2460 struct iwl_dbgfs_tx_queue_priv *priv = seq->private; 2461 struct iwl_dbgfs_tx_queue_state *state = v; 2462 2463 *pos = ++state->pos; 2464 2465 if (*pos >= priv->trans->trans_cfg->base_params->num_of_queues) 2466 return NULL; 2467 2468 return state; 2469 } 2470 2471 static void iwl_dbgfs_tx_queue_seq_stop(struct seq_file *seq, void *v) 2472 { 2473 kfree(v); 2474 } 2475 2476 static int iwl_dbgfs_tx_queue_seq_show(struct seq_file *seq, void *v) 2477 { 2478 struct iwl_dbgfs_tx_queue_priv *priv = seq->private; 2479 struct iwl_dbgfs_tx_queue_state *state = v; 2480 struct iwl_trans *trans = priv->trans; 2481 struct iwl_txq *txq = trans->txqs.txq[state->pos]; 2482 2483 seq_printf(seq, "hwq %.3u: used=%d stopped=%d ", 2484 (unsigned int)state->pos, 2485 !!test_bit(state->pos, trans->txqs.queue_used), 2486 !!test_bit(state->pos, trans->txqs.queue_stopped)); 2487 if (txq) 2488 seq_printf(seq, 2489 "read=%u write=%u need_update=%d frozen=%d n_window=%d ampdu=%d", 2490 txq->read_ptr, txq->write_ptr, 2491 txq->need_update, txq->frozen, 2492 txq->n_window, txq->ampdu); 2493 else 2494 seq_puts(seq, "(unallocated)"); 2495 2496 if (state->pos == trans->txqs.cmd.q_id) 2497 seq_puts(seq, " (HCMD)"); 2498 seq_puts(seq, "\n"); 2499 2500 return 0; 2501 } 2502 2503 static const struct seq_operations iwl_dbgfs_tx_queue_seq_ops = { 2504 .start = iwl_dbgfs_tx_queue_seq_start, 2505 .next = iwl_dbgfs_tx_queue_seq_next, 2506 .stop = iwl_dbgfs_tx_queue_seq_stop, 2507 .show = iwl_dbgfs_tx_queue_seq_show, 2508 }; 2509 2510 static int iwl_dbgfs_tx_queue_open(struct inode *inode, struct file *filp) 2511 { 2512 struct iwl_dbgfs_tx_queue_priv *priv; 2513 2514 priv = __seq_open_private(filp, &iwl_dbgfs_tx_queue_seq_ops, 2515 sizeof(*priv)); 2516 2517 if (!priv) 2518 return -ENOMEM; 2519 2520 priv->trans = inode->i_private; 2521 return 0; 2522 } 2523 2524 static ssize_t iwl_dbgfs_rx_queue_read(struct file *file, 2525 char __user *user_buf, 2526 size_t count, loff_t *ppos) 2527 { 2528 struct iwl_trans *trans = file->private_data; 2529 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); 2530 char *buf; 2531 int pos = 0, i, ret; 2532 size_t bufsz; 2533 2534 bufsz = sizeof(char) * 121 * trans->num_rx_queues; 2535 2536 if (!trans_pcie->rxq) 2537 return -EAGAIN; 2538 2539 buf = kzalloc(bufsz, GFP_KERNEL); 2540 if (!buf) 2541 return -ENOMEM; 2542 2543 for (i = 0; i < trans->num_rx_queues && pos < bufsz; i++) { 2544 struct iwl_rxq *rxq = &trans_pcie->rxq[i]; 2545 2546 pos += scnprintf(buf + pos, bufsz - pos, "queue#: %2d\n", 2547 i); 2548 pos += scnprintf(buf + pos, bufsz - pos, "\tread: %u\n", 2549 rxq->read); 2550 pos += scnprintf(buf + pos, bufsz - pos, "\twrite: %u\n", 2551 rxq->write); 2552 pos += scnprintf(buf + pos, bufsz - pos, "\twrite_actual: %u\n", 2553 rxq->write_actual); 2554 pos += scnprintf(buf + pos, bufsz - pos, "\tneed_update: %2d\n", 2555 rxq->need_update); 2556 pos += scnprintf(buf + pos, bufsz - pos, "\tfree_count: %u\n", 2557 rxq->free_count); 2558 if (rxq->rb_stts) { 2559 u32 r = __le16_to_cpu(iwl_get_closed_rb_stts(trans, 2560 rxq)); 2561 pos += scnprintf(buf + pos, bufsz - pos, 2562 "\tclosed_rb_num: %u\n", 2563 r & 0x0FFF); 2564 } else { 2565 pos += scnprintf(buf + pos, bufsz - pos, 2566 "\tclosed_rb_num: Not Allocated\n"); 2567 } 2568 } 2569 ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos); 2570 kfree(buf); 2571 2572 return ret; 2573 } 2574 2575 static ssize_t iwl_dbgfs_interrupt_read(struct file *file, 2576 char __user *user_buf, 2577 size_t count, loff_t *ppos) 2578 { 2579 struct iwl_trans *trans = file->private_data; 2580 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); 2581 struct isr_statistics *isr_stats = &trans_pcie->isr_stats; 2582 2583 int pos = 0; 2584 char *buf; 2585 int bufsz = 24 * 64; /* 24 items * 64 char per item */ 2586 ssize_t ret; 2587 2588 buf = kzalloc(bufsz, GFP_KERNEL); 2589 if (!buf) 2590 return -ENOMEM; 2591 2592 pos += scnprintf(buf + pos, bufsz - pos, 2593 "Interrupt Statistics Report:\n"); 2594 2595 pos += scnprintf(buf + pos, bufsz - pos, "HW Error:\t\t\t %u\n", 2596 isr_stats->hw); 2597 pos += scnprintf(buf + pos, bufsz - pos, "SW Error:\t\t\t %u\n", 2598 isr_stats->sw); 2599 if (isr_stats->sw || isr_stats->hw) { 2600 pos += scnprintf(buf + pos, bufsz - pos, 2601 "\tLast Restarting Code: 0x%X\n", 2602 isr_stats->err_code); 2603 } 2604 #ifdef CONFIG_IWLWIFI_DEBUG 2605 pos += scnprintf(buf + pos, bufsz - pos, "Frame transmitted:\t\t %u\n", 2606 isr_stats->sch); 2607 pos += scnprintf(buf + pos, bufsz - pos, "Alive interrupt:\t\t %u\n", 2608 isr_stats->alive); 2609 #endif 2610 pos += scnprintf(buf + pos, bufsz - pos, 2611 "HW RF KILL switch toggled:\t %u\n", isr_stats->rfkill); 2612 2613 pos += scnprintf(buf + pos, bufsz - pos, "CT KILL:\t\t\t %u\n", 2614 isr_stats->ctkill); 2615 2616 pos += scnprintf(buf + pos, bufsz - pos, "Wakeup Interrupt:\t\t %u\n", 2617 isr_stats->wakeup); 2618 2619 pos += scnprintf(buf + pos, bufsz - pos, 2620 "Rx command responses:\t\t %u\n", isr_stats->rx); 2621 2622 pos += scnprintf(buf + pos, bufsz - pos, "Tx/FH interrupt:\t\t %u\n", 2623 isr_stats->tx); 2624 2625 pos += scnprintf(buf + pos, bufsz - pos, "Unexpected INTA:\t\t %u\n", 2626 isr_stats->unhandled); 2627 2628 ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos); 2629 kfree(buf); 2630 return ret; 2631 } 2632 2633 static ssize_t iwl_dbgfs_interrupt_write(struct file *file, 2634 const char __user *user_buf, 2635 size_t count, loff_t *ppos) 2636 { 2637 struct iwl_trans *trans = file->private_data; 2638 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); 2639 struct isr_statistics *isr_stats = &trans_pcie->isr_stats; 2640 u32 reset_flag; 2641 int ret; 2642 2643 ret = kstrtou32_from_user(user_buf, count, 16, &reset_flag); 2644 if (ret) 2645 return ret; 2646 if (reset_flag == 0) 2647 memset(isr_stats, 0, sizeof(*isr_stats)); 2648 2649 return count; 2650 } 2651 2652 static ssize_t iwl_dbgfs_csr_write(struct file *file, 2653 const char __user *user_buf, 2654 size_t count, loff_t *ppos) 2655 { 2656 struct iwl_trans *trans = file->private_data; 2657 2658 iwl_pcie_dump_csr(trans); 2659 2660 return count; 2661 } 2662 2663 static ssize_t iwl_dbgfs_fh_reg_read(struct file *file, 2664 char __user *user_buf, 2665 size_t count, loff_t *ppos) 2666 { 2667 struct iwl_trans *trans = file->private_data; 2668 char *buf = NULL; 2669 ssize_t ret; 2670 2671 ret = iwl_dump_fh(trans, &buf); 2672 if (ret < 0) 2673 return ret; 2674 if (!buf) 2675 return -EINVAL; 2676 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret); 2677 kfree(buf); 2678 return ret; 2679 } 2680 2681 static ssize_t iwl_dbgfs_rfkill_read(struct file *file, 2682 char __user *user_buf, 2683 size_t count, loff_t *ppos) 2684 { 2685 struct iwl_trans *trans = file->private_data; 2686 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); 2687 char buf[100]; 2688 int pos; 2689 2690 pos = scnprintf(buf, sizeof(buf), "debug: %d\nhw: %d\n", 2691 trans_pcie->debug_rfkill, 2692 !(iwl_read32(trans, CSR_GP_CNTRL) & 2693 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)); 2694 2695 return simple_read_from_buffer(user_buf, count, ppos, buf, pos); 2696 } 2697 2698 static ssize_t iwl_dbgfs_rfkill_write(struct file *file, 2699 const char __user *user_buf, 2700 size_t count, loff_t *ppos) 2701 { 2702 struct iwl_trans *trans = file->private_data; 2703 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); 2704 bool new_value; 2705 int ret; 2706 2707 ret = kstrtobool_from_user(user_buf, count, &new_value); 2708 if (ret) 2709 return ret; 2710 if (new_value == trans_pcie->debug_rfkill) 2711 return count; 2712 IWL_WARN(trans, "changing debug rfkill %d->%d\n", 2713 trans_pcie->debug_rfkill, new_value); 2714 trans_pcie->debug_rfkill = new_value; 2715 iwl_pcie_handle_rfkill_irq(trans); 2716 2717 return count; 2718 } 2719 2720 static int iwl_dbgfs_monitor_data_open(struct inode *inode, 2721 struct file *file) 2722 { 2723 struct iwl_trans *trans = inode->i_private; 2724 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); 2725 2726 if (!trans->dbg.dest_tlv || 2727 trans->dbg.dest_tlv->monitor_mode != EXTERNAL_MODE) { 2728 IWL_ERR(trans, "Debug destination is not set to DRAM\n"); 2729 return -ENOENT; 2730 } 2731 2732 if (trans_pcie->fw_mon_data.state != IWL_FW_MON_DBGFS_STATE_CLOSED) 2733 return -EBUSY; 2734 2735 trans_pcie->fw_mon_data.state = IWL_FW_MON_DBGFS_STATE_OPEN; 2736 return simple_open(inode, file); 2737 } 2738 2739 static int iwl_dbgfs_monitor_data_release(struct inode *inode, 2740 struct file *file) 2741 { 2742 struct iwl_trans_pcie *trans_pcie = 2743 IWL_TRANS_GET_PCIE_TRANS(inode->i_private); 2744 2745 if (trans_pcie->fw_mon_data.state == IWL_FW_MON_DBGFS_STATE_OPEN) 2746 trans_pcie->fw_mon_data.state = IWL_FW_MON_DBGFS_STATE_CLOSED; 2747 return 0; 2748 } 2749 2750 static bool iwl_write_to_user_buf(char __user *user_buf, ssize_t count, 2751 void *buf, ssize_t *size, 2752 ssize_t *bytes_copied) 2753 { 2754 int buf_size_left = count - *bytes_copied; 2755 2756 buf_size_left = buf_size_left - (buf_size_left % sizeof(u32)); 2757 if (*size > buf_size_left) 2758 *size = buf_size_left; 2759 2760 *size -= copy_to_user(user_buf, buf, *size); 2761 *bytes_copied += *size; 2762 2763 if (buf_size_left == *size) 2764 return true; 2765 return false; 2766 } 2767 2768 static ssize_t iwl_dbgfs_monitor_data_read(struct file *file, 2769 char __user *user_buf, 2770 size_t count, loff_t *ppos) 2771 { 2772 struct iwl_trans *trans = file->private_data; 2773 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); 2774 void *cpu_addr = (void *)trans->dbg.fw_mon.block, *curr_buf; 2775 struct cont_rec *data = &trans_pcie->fw_mon_data; 2776 u32 write_ptr_addr, wrap_cnt_addr, write_ptr, wrap_cnt; 2777 ssize_t size, bytes_copied = 0; 2778 bool b_full; 2779 2780 if (trans->dbg.dest_tlv) { 2781 write_ptr_addr = 2782 le32_to_cpu(trans->dbg.dest_tlv->write_ptr_reg); 2783 wrap_cnt_addr = le32_to_cpu(trans->dbg.dest_tlv->wrap_count); 2784 } else { 2785 write_ptr_addr = MON_BUFF_WRPTR; 2786 wrap_cnt_addr = MON_BUFF_CYCLE_CNT; 2787 } 2788 2789 if (unlikely(!trans->dbg.rec_on)) 2790 return 0; 2791 2792 mutex_lock(&data->mutex); 2793 if (data->state == 2794 IWL_FW_MON_DBGFS_STATE_DISABLED) { 2795 mutex_unlock(&data->mutex); 2796 return 0; 2797 } 2798 2799 /* write_ptr position in bytes rather then DW */ 2800 write_ptr = iwl_read_prph(trans, write_ptr_addr) * sizeof(u32); 2801 wrap_cnt = iwl_read_prph(trans, wrap_cnt_addr); 2802 2803 if (data->prev_wrap_cnt == wrap_cnt) { 2804 size = write_ptr - data->prev_wr_ptr; 2805 curr_buf = cpu_addr + data->prev_wr_ptr; 2806 b_full = iwl_write_to_user_buf(user_buf, count, 2807 curr_buf, &size, 2808 &bytes_copied); 2809 data->prev_wr_ptr += size; 2810 2811 } else if (data->prev_wrap_cnt == wrap_cnt - 1 && 2812 write_ptr < data->prev_wr_ptr) { 2813 size = trans->dbg.fw_mon.size - data->prev_wr_ptr; 2814 curr_buf = cpu_addr + data->prev_wr_ptr; 2815 b_full = iwl_write_to_user_buf(user_buf, count, 2816 curr_buf, &size, 2817 &bytes_copied); 2818 data->prev_wr_ptr += size; 2819 2820 if (!b_full) { 2821 size = write_ptr; 2822 b_full = iwl_write_to_user_buf(user_buf, count, 2823 cpu_addr, &size, 2824 &bytes_copied); 2825 data->prev_wr_ptr = size; 2826 data->prev_wrap_cnt++; 2827 } 2828 } else { 2829 if (data->prev_wrap_cnt == wrap_cnt - 1 && 2830 write_ptr > data->prev_wr_ptr) 2831 IWL_WARN(trans, 2832 "write pointer passed previous write pointer, start copying from the beginning\n"); 2833 else if (!unlikely(data->prev_wrap_cnt == 0 && 2834 data->prev_wr_ptr == 0)) 2835 IWL_WARN(trans, 2836 "monitor data is out of sync, start copying from the beginning\n"); 2837 2838 size = write_ptr; 2839 b_full = iwl_write_to_user_buf(user_buf, count, 2840 cpu_addr, &size, 2841 &bytes_copied); 2842 data->prev_wr_ptr = size; 2843 data->prev_wrap_cnt = wrap_cnt; 2844 } 2845 2846 mutex_unlock(&data->mutex); 2847 2848 return bytes_copied; 2849 } 2850 2851 DEBUGFS_READ_WRITE_FILE_OPS(interrupt); 2852 DEBUGFS_READ_FILE_OPS(fh_reg); 2853 DEBUGFS_READ_FILE_OPS(rx_queue); 2854 DEBUGFS_WRITE_FILE_OPS(csr); 2855 DEBUGFS_READ_WRITE_FILE_OPS(rfkill); 2856 static const struct file_operations iwl_dbgfs_tx_queue_ops = { 2857 .owner = THIS_MODULE, 2858 .open = iwl_dbgfs_tx_queue_open, 2859 .read = seq_read, 2860 .llseek = seq_lseek, 2861 .release = seq_release_private, 2862 }; 2863 2864 static const struct file_operations iwl_dbgfs_monitor_data_ops = { 2865 .read = iwl_dbgfs_monitor_data_read, 2866 .open = iwl_dbgfs_monitor_data_open, 2867 .release = iwl_dbgfs_monitor_data_release, 2868 }; 2869 2870 /* Create the debugfs files and directories */ 2871 void iwl_trans_pcie_dbgfs_register(struct iwl_trans *trans) 2872 { 2873 struct dentry *dir = trans->dbgfs_dir; 2874 2875 DEBUGFS_ADD_FILE(rx_queue, dir, 0400); 2876 DEBUGFS_ADD_FILE(tx_queue, dir, 0400); 2877 DEBUGFS_ADD_FILE(interrupt, dir, 0600); 2878 DEBUGFS_ADD_FILE(csr, dir, 0200); 2879 DEBUGFS_ADD_FILE(fh_reg, dir, 0400); 2880 DEBUGFS_ADD_FILE(rfkill, dir, 0600); 2881 DEBUGFS_ADD_FILE(monitor_data, dir, 0400); 2882 } 2883 2884 static void iwl_trans_pcie_debugfs_cleanup(struct iwl_trans *trans) 2885 { 2886 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); 2887 struct cont_rec *data = &trans_pcie->fw_mon_data; 2888 2889 mutex_lock(&data->mutex); 2890 data->state = IWL_FW_MON_DBGFS_STATE_DISABLED; 2891 mutex_unlock(&data->mutex); 2892 } 2893 #endif /*CONFIG_IWLWIFI_DEBUGFS */ 2894 2895 static u32 iwl_trans_pcie_get_cmdlen(struct iwl_trans *trans, void *tfd) 2896 { 2897 u32 cmdlen = 0; 2898 int i; 2899 2900 for (i = 0; i < trans->txqs.tfd.max_tbs; i++) 2901 cmdlen += iwl_txq_gen1_tfd_tb_get_len(trans, tfd, i); 2902 2903 return cmdlen; 2904 } 2905 2906 static u32 iwl_trans_pcie_dump_rbs(struct iwl_trans *trans, 2907 struct iwl_fw_error_dump_data **data, 2908 int allocated_rb_nums) 2909 { 2910 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); 2911 int max_len = trans_pcie->rx_buf_bytes; 2912 /* Dump RBs is supported only for pre-9000 devices (1 queue) */ 2913 struct iwl_rxq *rxq = &trans_pcie->rxq[0]; 2914 u32 i, r, j, rb_len = 0; 2915 2916 spin_lock(&rxq->lock); 2917 2918 r = le16_to_cpu(iwl_get_closed_rb_stts(trans, rxq)) & 0x0FFF; 2919 2920 for (i = rxq->read, j = 0; 2921 i != r && j < allocated_rb_nums; 2922 i = (i + 1) & RX_QUEUE_MASK, j++) { 2923 struct iwl_rx_mem_buffer *rxb = rxq->queue[i]; 2924 struct iwl_fw_error_dump_rb *rb; 2925 2926 dma_unmap_page(trans->dev, rxb->page_dma, max_len, 2927 DMA_FROM_DEVICE); 2928 2929 rb_len += sizeof(**data) + sizeof(*rb) + max_len; 2930 2931 (*data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_RB); 2932 (*data)->len = cpu_to_le32(sizeof(*rb) + max_len); 2933 rb = (void *)(*data)->data; 2934 rb->index = cpu_to_le32(i); 2935 memcpy(rb->data, page_address(rxb->page), max_len); 2936 /* remap the page for the free benefit */ 2937 rxb->page_dma = dma_map_page(trans->dev, rxb->page, 2938 rxb->offset, max_len, 2939 DMA_FROM_DEVICE); 2940 2941 *data = iwl_fw_error_next_data(*data); 2942 } 2943 2944 spin_unlock(&rxq->lock); 2945 2946 return rb_len; 2947 } 2948 #define IWL_CSR_TO_DUMP (0x250) 2949 2950 static u32 iwl_trans_pcie_dump_csr(struct iwl_trans *trans, 2951 struct iwl_fw_error_dump_data **data) 2952 { 2953 u32 csr_len = sizeof(**data) + IWL_CSR_TO_DUMP; 2954 __le32 *val; 2955 int i; 2956 2957 (*data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_CSR); 2958 (*data)->len = cpu_to_le32(IWL_CSR_TO_DUMP); 2959 val = (void *)(*data)->data; 2960 2961 for (i = 0; i < IWL_CSR_TO_DUMP; i += 4) 2962 *val++ = cpu_to_le32(iwl_trans_pcie_read32(trans, i)); 2963 2964 *data = iwl_fw_error_next_data(*data); 2965 2966 return csr_len; 2967 } 2968 2969 static u32 iwl_trans_pcie_fh_regs_dump(struct iwl_trans *trans, 2970 struct iwl_fw_error_dump_data **data) 2971 { 2972 u32 fh_regs_len = FH_MEM_UPPER_BOUND - FH_MEM_LOWER_BOUND; 2973 __le32 *val; 2974 int i; 2975 2976 if (!iwl_trans_grab_nic_access(trans)) 2977 return 0; 2978 2979 (*data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_FH_REGS); 2980 (*data)->len = cpu_to_le32(fh_regs_len); 2981 val = (void *)(*data)->data; 2982 2983 if (!trans->trans_cfg->gen2) 2984 for (i = FH_MEM_LOWER_BOUND; i < FH_MEM_UPPER_BOUND; 2985 i += sizeof(u32)) 2986 *val++ = cpu_to_le32(iwl_trans_pcie_read32(trans, i)); 2987 else 2988 for (i = iwl_umac_prph(trans, FH_MEM_LOWER_BOUND_GEN2); 2989 i < iwl_umac_prph(trans, FH_MEM_UPPER_BOUND_GEN2); 2990 i += sizeof(u32)) 2991 *val++ = cpu_to_le32(iwl_trans_pcie_read_prph(trans, 2992 i)); 2993 2994 iwl_trans_release_nic_access(trans); 2995 2996 *data = iwl_fw_error_next_data(*data); 2997 2998 return sizeof(**data) + fh_regs_len; 2999 } 3000 3001 static u32 3002 iwl_trans_pci_dump_marbh_monitor(struct iwl_trans *trans, 3003 struct iwl_fw_error_dump_fw_mon *fw_mon_data, 3004 u32 monitor_len) 3005 { 3006 u32 buf_size_in_dwords = (monitor_len >> 2); 3007 u32 *buffer = (u32 *)fw_mon_data->data; 3008 u32 i; 3009 3010 if (!iwl_trans_grab_nic_access(trans)) 3011 return 0; 3012 3013 iwl_write_umac_prph_no_grab(trans, MON_DMARB_RD_CTL_ADDR, 0x1); 3014 for (i = 0; i < buf_size_in_dwords; i++) 3015 buffer[i] = iwl_read_umac_prph_no_grab(trans, 3016 MON_DMARB_RD_DATA_ADDR); 3017 iwl_write_umac_prph_no_grab(trans, MON_DMARB_RD_CTL_ADDR, 0x0); 3018 3019 iwl_trans_release_nic_access(trans); 3020 3021 return monitor_len; 3022 } 3023 3024 static void 3025 iwl_trans_pcie_dump_pointers(struct iwl_trans *trans, 3026 struct iwl_fw_error_dump_fw_mon *fw_mon_data) 3027 { 3028 u32 base, base_high, write_ptr, write_ptr_val, wrap_cnt; 3029 3030 if (trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_AX210) { 3031 base = DBGC_CUR_DBGBUF_BASE_ADDR_LSB; 3032 base_high = DBGC_CUR_DBGBUF_BASE_ADDR_MSB; 3033 write_ptr = DBGC_CUR_DBGBUF_STATUS; 3034 wrap_cnt = DBGC_DBGBUF_WRAP_AROUND; 3035 } else if (trans->dbg.dest_tlv) { 3036 write_ptr = le32_to_cpu(trans->dbg.dest_tlv->write_ptr_reg); 3037 wrap_cnt = le32_to_cpu(trans->dbg.dest_tlv->wrap_count); 3038 base = le32_to_cpu(trans->dbg.dest_tlv->base_reg); 3039 } else { 3040 base = MON_BUFF_BASE_ADDR; 3041 write_ptr = MON_BUFF_WRPTR; 3042 wrap_cnt = MON_BUFF_CYCLE_CNT; 3043 } 3044 3045 write_ptr_val = iwl_read_prph(trans, write_ptr); 3046 fw_mon_data->fw_mon_cycle_cnt = 3047 cpu_to_le32(iwl_read_prph(trans, wrap_cnt)); 3048 fw_mon_data->fw_mon_base_ptr = 3049 cpu_to_le32(iwl_read_prph(trans, base)); 3050 if (trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_AX210) { 3051 fw_mon_data->fw_mon_base_high_ptr = 3052 cpu_to_le32(iwl_read_prph(trans, base_high)); 3053 write_ptr_val &= DBGC_CUR_DBGBUF_STATUS_OFFSET_MSK; 3054 /* convert wrtPtr to DWs, to align with all HWs */ 3055 write_ptr_val >>= 2; 3056 } 3057 fw_mon_data->fw_mon_wr_ptr = cpu_to_le32(write_ptr_val); 3058 } 3059 3060 static u32 3061 iwl_trans_pcie_dump_monitor(struct iwl_trans *trans, 3062 struct iwl_fw_error_dump_data **data, 3063 u32 monitor_len) 3064 { 3065 struct iwl_dram_data *fw_mon = &trans->dbg.fw_mon; 3066 u32 len = 0; 3067 3068 if (trans->dbg.dest_tlv || 3069 (fw_mon->size && 3070 (trans->trans_cfg->device_family == IWL_DEVICE_FAMILY_7000 || 3071 trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_AX210))) { 3072 struct iwl_fw_error_dump_fw_mon *fw_mon_data; 3073 3074 (*data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_FW_MONITOR); 3075 fw_mon_data = (void *)(*data)->data; 3076 3077 iwl_trans_pcie_dump_pointers(trans, fw_mon_data); 3078 3079 len += sizeof(**data) + sizeof(*fw_mon_data); 3080 if (fw_mon->size) { 3081 memcpy(fw_mon_data->data, fw_mon->block, fw_mon->size); 3082 monitor_len = fw_mon->size; 3083 } else if (trans->dbg.dest_tlv->monitor_mode == SMEM_MODE) { 3084 u32 base = le32_to_cpu(fw_mon_data->fw_mon_base_ptr); 3085 /* 3086 * Update pointers to reflect actual values after 3087 * shifting 3088 */ 3089 if (trans->dbg.dest_tlv->version) { 3090 base = (iwl_read_prph(trans, base) & 3091 IWL_LDBG_M2S_BUF_BA_MSK) << 3092 trans->dbg.dest_tlv->base_shift; 3093 base *= IWL_M2S_UNIT_SIZE; 3094 base += trans->cfg->smem_offset; 3095 } else { 3096 base = iwl_read_prph(trans, base) << 3097 trans->dbg.dest_tlv->base_shift; 3098 } 3099 3100 iwl_trans_read_mem(trans, base, fw_mon_data->data, 3101 monitor_len / sizeof(u32)); 3102 } else if (trans->dbg.dest_tlv->monitor_mode == MARBH_MODE) { 3103 monitor_len = 3104 iwl_trans_pci_dump_marbh_monitor(trans, 3105 fw_mon_data, 3106 monitor_len); 3107 } else { 3108 /* Didn't match anything - output no monitor data */ 3109 monitor_len = 0; 3110 } 3111 3112 len += monitor_len; 3113 (*data)->len = cpu_to_le32(monitor_len + sizeof(*fw_mon_data)); 3114 } 3115 3116 return len; 3117 } 3118 3119 static int iwl_trans_get_fw_monitor_len(struct iwl_trans *trans, u32 *len) 3120 { 3121 if (trans->dbg.fw_mon.size) { 3122 *len += sizeof(struct iwl_fw_error_dump_data) + 3123 sizeof(struct iwl_fw_error_dump_fw_mon) + 3124 trans->dbg.fw_mon.size; 3125 return trans->dbg.fw_mon.size; 3126 } else if (trans->dbg.dest_tlv) { 3127 u32 base, end, cfg_reg, monitor_len; 3128 3129 if (trans->dbg.dest_tlv->version == 1) { 3130 cfg_reg = le32_to_cpu(trans->dbg.dest_tlv->base_reg); 3131 cfg_reg = iwl_read_prph(trans, cfg_reg); 3132 base = (cfg_reg & IWL_LDBG_M2S_BUF_BA_MSK) << 3133 trans->dbg.dest_tlv->base_shift; 3134 base *= IWL_M2S_UNIT_SIZE; 3135 base += trans->cfg->smem_offset; 3136 3137 monitor_len = 3138 (cfg_reg & IWL_LDBG_M2S_BUF_SIZE_MSK) >> 3139 trans->dbg.dest_tlv->end_shift; 3140 monitor_len *= IWL_M2S_UNIT_SIZE; 3141 } else { 3142 base = le32_to_cpu(trans->dbg.dest_tlv->base_reg); 3143 end = le32_to_cpu(trans->dbg.dest_tlv->end_reg); 3144 3145 base = iwl_read_prph(trans, base) << 3146 trans->dbg.dest_tlv->base_shift; 3147 end = iwl_read_prph(trans, end) << 3148 trans->dbg.dest_tlv->end_shift; 3149 3150 /* Make "end" point to the actual end */ 3151 if (trans->trans_cfg->device_family >= 3152 IWL_DEVICE_FAMILY_8000 || 3153 trans->dbg.dest_tlv->monitor_mode == MARBH_MODE) 3154 end += (1 << trans->dbg.dest_tlv->end_shift); 3155 monitor_len = end - base; 3156 } 3157 *len += sizeof(struct iwl_fw_error_dump_data) + 3158 sizeof(struct iwl_fw_error_dump_fw_mon) + 3159 monitor_len; 3160 return monitor_len; 3161 } 3162 return 0; 3163 } 3164 3165 static struct iwl_trans_dump_data 3166 *iwl_trans_pcie_dump_data(struct iwl_trans *trans, 3167 u32 dump_mask) 3168 { 3169 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); 3170 struct iwl_fw_error_dump_data *data; 3171 struct iwl_txq *cmdq = trans->txqs.txq[trans->txqs.cmd.q_id]; 3172 struct iwl_fw_error_dump_txcmd *txcmd; 3173 struct iwl_trans_dump_data *dump_data; 3174 u32 len, num_rbs = 0, monitor_len = 0; 3175 int i, ptr; 3176 bool dump_rbs = test_bit(STATUS_FW_ERROR, &trans->status) && 3177 !trans->trans_cfg->mq_rx_supported && 3178 dump_mask & BIT(IWL_FW_ERROR_DUMP_RB); 3179 3180 if (!dump_mask) 3181 return NULL; 3182 3183 /* transport dump header */ 3184 len = sizeof(*dump_data); 3185 3186 /* host commands */ 3187 if (dump_mask & BIT(IWL_FW_ERROR_DUMP_TXCMD) && cmdq) 3188 len += sizeof(*data) + 3189 cmdq->n_window * (sizeof(*txcmd) + 3190 TFD_MAX_PAYLOAD_SIZE); 3191 3192 /* FW monitor */ 3193 if (dump_mask & BIT(IWL_FW_ERROR_DUMP_FW_MONITOR)) 3194 monitor_len = iwl_trans_get_fw_monitor_len(trans, &len); 3195 3196 /* CSR registers */ 3197 if (dump_mask & BIT(IWL_FW_ERROR_DUMP_CSR)) 3198 len += sizeof(*data) + IWL_CSR_TO_DUMP; 3199 3200 /* FH registers */ 3201 if (dump_mask & BIT(IWL_FW_ERROR_DUMP_FH_REGS)) { 3202 if (trans->trans_cfg->gen2) 3203 len += sizeof(*data) + 3204 (iwl_umac_prph(trans, FH_MEM_UPPER_BOUND_GEN2) - 3205 iwl_umac_prph(trans, FH_MEM_LOWER_BOUND_GEN2)); 3206 else 3207 len += sizeof(*data) + 3208 (FH_MEM_UPPER_BOUND - 3209 FH_MEM_LOWER_BOUND); 3210 } 3211 3212 if (dump_rbs) { 3213 /* Dump RBs is supported only for pre-9000 devices (1 queue) */ 3214 struct iwl_rxq *rxq = &trans_pcie->rxq[0]; 3215 /* RBs */ 3216 num_rbs = 3217 le16_to_cpu(iwl_get_closed_rb_stts(trans, rxq)) 3218 & 0x0FFF; 3219 num_rbs = (num_rbs - rxq->read) & RX_QUEUE_MASK; 3220 len += num_rbs * (sizeof(*data) + 3221 sizeof(struct iwl_fw_error_dump_rb) + 3222 (PAGE_SIZE << trans_pcie->rx_page_order)); 3223 } 3224 3225 /* Paged memory for gen2 HW */ 3226 if (trans->trans_cfg->gen2 && dump_mask & BIT(IWL_FW_ERROR_DUMP_PAGING)) 3227 for (i = 0; i < trans->init_dram.paging_cnt; i++) 3228 len += sizeof(*data) + 3229 sizeof(struct iwl_fw_error_dump_paging) + 3230 trans->init_dram.paging[i].size; 3231 3232 dump_data = vzalloc(len); 3233 if (!dump_data) 3234 return NULL; 3235 3236 len = 0; 3237 data = (void *)dump_data->data; 3238 3239 if (dump_mask & BIT(IWL_FW_ERROR_DUMP_TXCMD) && cmdq) { 3240 u16 tfd_size = trans->txqs.tfd.size; 3241 3242 data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_TXCMD); 3243 txcmd = (void *)data->data; 3244 spin_lock_bh(&cmdq->lock); 3245 ptr = cmdq->write_ptr; 3246 for (i = 0; i < cmdq->n_window; i++) { 3247 u8 idx = iwl_txq_get_cmd_index(cmdq, ptr); 3248 u8 tfdidx; 3249 u32 caplen, cmdlen; 3250 3251 if (trans->trans_cfg->use_tfh) 3252 tfdidx = idx; 3253 else 3254 tfdidx = ptr; 3255 3256 cmdlen = iwl_trans_pcie_get_cmdlen(trans, 3257 (u8 *)cmdq->tfds + 3258 tfd_size * tfdidx); 3259 caplen = min_t(u32, TFD_MAX_PAYLOAD_SIZE, cmdlen); 3260 3261 if (cmdlen) { 3262 len += sizeof(*txcmd) + caplen; 3263 txcmd->cmdlen = cpu_to_le32(cmdlen); 3264 txcmd->caplen = cpu_to_le32(caplen); 3265 memcpy(txcmd->data, cmdq->entries[idx].cmd, 3266 caplen); 3267 txcmd = (void *)((u8 *)txcmd->data + caplen); 3268 } 3269 3270 ptr = iwl_txq_dec_wrap(trans, ptr); 3271 } 3272 spin_unlock_bh(&cmdq->lock); 3273 3274 data->len = cpu_to_le32(len); 3275 len += sizeof(*data); 3276 data = iwl_fw_error_next_data(data); 3277 } 3278 3279 if (dump_mask & BIT(IWL_FW_ERROR_DUMP_CSR)) 3280 len += iwl_trans_pcie_dump_csr(trans, &data); 3281 if (dump_mask & BIT(IWL_FW_ERROR_DUMP_FH_REGS)) 3282 len += iwl_trans_pcie_fh_regs_dump(trans, &data); 3283 if (dump_rbs) 3284 len += iwl_trans_pcie_dump_rbs(trans, &data, num_rbs); 3285 3286 /* Paged memory for gen2 HW */ 3287 if (trans->trans_cfg->gen2 && 3288 dump_mask & BIT(IWL_FW_ERROR_DUMP_PAGING)) { 3289 for (i = 0; i < trans->init_dram.paging_cnt; i++) { 3290 struct iwl_fw_error_dump_paging *paging; 3291 u32 page_len = trans->init_dram.paging[i].size; 3292 3293 data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_PAGING); 3294 data->len = cpu_to_le32(sizeof(*paging) + page_len); 3295 paging = (void *)data->data; 3296 paging->index = cpu_to_le32(i); 3297 memcpy(paging->data, 3298 trans->init_dram.paging[i].block, page_len); 3299 data = iwl_fw_error_next_data(data); 3300 3301 len += sizeof(*data) + sizeof(*paging) + page_len; 3302 } 3303 } 3304 if (dump_mask & BIT(IWL_FW_ERROR_DUMP_FW_MONITOR)) 3305 len += iwl_trans_pcie_dump_monitor(trans, &data, monitor_len); 3306 3307 dump_data->len = len; 3308 3309 return dump_data; 3310 } 3311 3312 static void iwl_trans_pci_interrupts(struct iwl_trans *trans, bool enable) 3313 { 3314 if (enable) 3315 iwl_enable_interrupts(trans); 3316 else 3317 iwl_disable_interrupts(trans); 3318 } 3319 3320 static void iwl_trans_pcie_sync_nmi(struct iwl_trans *trans) 3321 { 3322 u32 inta_addr, sw_err_bit; 3323 struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); 3324 3325 if (trans_pcie->msix_enabled) { 3326 inta_addr = CSR_MSIX_HW_INT_CAUSES_AD; 3327 sw_err_bit = MSIX_HW_INT_CAUSES_REG_SW_ERR; 3328 } else { 3329 inta_addr = CSR_INT; 3330 sw_err_bit = CSR_INT_BIT_SW_ERR; 3331 } 3332 3333 iwl_trans_sync_nmi_with_addr(trans, inta_addr, sw_err_bit); 3334 } 3335 3336 #define IWL_TRANS_COMMON_OPS \ 3337 .op_mode_leave = iwl_trans_pcie_op_mode_leave, \ 3338 .write8 = iwl_trans_pcie_write8, \ 3339 .write32 = iwl_trans_pcie_write32, \ 3340 .read32 = iwl_trans_pcie_read32, \ 3341 .read_prph = iwl_trans_pcie_read_prph, \ 3342 .write_prph = iwl_trans_pcie_write_prph, \ 3343 .read_mem = iwl_trans_pcie_read_mem, \ 3344 .write_mem = iwl_trans_pcie_write_mem, \ 3345 .read_config32 = iwl_trans_pcie_read_config32, \ 3346 .configure = iwl_trans_pcie_configure, \ 3347 .set_pmi = iwl_trans_pcie_set_pmi, \ 3348 .sw_reset = iwl_trans_pcie_sw_reset, \ 3349 .grab_nic_access = iwl_trans_pcie_grab_nic_access, \ 3350 .release_nic_access = iwl_trans_pcie_release_nic_access, \ 3351 .set_bits_mask = iwl_trans_pcie_set_bits_mask, \ 3352 .dump_data = iwl_trans_pcie_dump_data, \ 3353 .d3_suspend = iwl_trans_pcie_d3_suspend, \ 3354 .d3_resume = iwl_trans_pcie_d3_resume, \ 3355 .interrupts = iwl_trans_pci_interrupts, \ 3356 .sync_nmi = iwl_trans_pcie_sync_nmi \ 3357 3358 static const struct iwl_trans_ops trans_ops_pcie = { 3359 IWL_TRANS_COMMON_OPS, 3360 .start_hw = iwl_trans_pcie_start_hw, 3361 .fw_alive = iwl_trans_pcie_fw_alive, 3362 .start_fw = iwl_trans_pcie_start_fw, 3363 .stop_device = iwl_trans_pcie_stop_device, 3364 3365 .send_cmd = iwl_pcie_enqueue_hcmd, 3366 3367 .tx = iwl_trans_pcie_tx, 3368 .reclaim = iwl_txq_reclaim, 3369 3370 .txq_disable = iwl_trans_pcie_txq_disable, 3371 .txq_enable = iwl_trans_pcie_txq_enable, 3372 3373 .txq_set_shared_mode = iwl_trans_pcie_txq_set_shared_mode, 3374 3375 .wait_tx_queues_empty = iwl_trans_pcie_wait_txqs_empty, 3376 3377 .freeze_txq_timer = iwl_trans_txq_freeze_timer, 3378 .block_txq_ptrs = iwl_trans_pcie_block_txq_ptrs, 3379 #ifdef CONFIG_IWLWIFI_DEBUGFS 3380 .debugfs_cleanup = iwl_trans_pcie_debugfs_cleanup, 3381 #endif 3382 }; 3383 3384 static const struct iwl_trans_ops trans_ops_pcie_gen2 = { 3385 IWL_TRANS_COMMON_OPS, 3386 .start_hw = iwl_trans_pcie_start_hw, 3387 .fw_alive = iwl_trans_pcie_gen2_fw_alive, 3388 .start_fw = iwl_trans_pcie_gen2_start_fw, 3389 .stop_device = iwl_trans_pcie_gen2_stop_device, 3390 3391 .send_cmd = iwl_pcie_gen2_enqueue_hcmd, 3392 3393 .tx = iwl_txq_gen2_tx, 3394 .reclaim = iwl_txq_reclaim, 3395 3396 .set_q_ptrs = iwl_txq_set_q_ptrs, 3397 3398 .txq_alloc = iwl_txq_dyn_alloc, 3399 .txq_free = iwl_txq_dyn_free, 3400 .wait_txq_empty = iwl_trans_pcie_wait_txq_empty, 3401 .rxq_dma_data = iwl_trans_pcie_rxq_dma_data, 3402 .set_pnvm = iwl_trans_pcie_ctx_info_gen3_set_pnvm, 3403 #ifdef CONFIG_IWLWIFI_DEBUGFS 3404 .debugfs_cleanup = iwl_trans_pcie_debugfs_cleanup, 3405 #endif 3406 }; 3407 3408 struct iwl_trans *iwl_trans_pcie_alloc(struct pci_dev *pdev, 3409 const struct pci_device_id *ent, 3410 const struct iwl_cfg_trans_params *cfg_trans) 3411 { 3412 struct iwl_trans_pcie *trans_pcie; 3413 struct iwl_trans *trans; 3414 int ret, addr_size; 3415 const struct iwl_trans_ops *ops = &trans_ops_pcie_gen2; 3416 3417 if (!cfg_trans->gen2) 3418 ops = &trans_ops_pcie; 3419 3420 ret = pcim_enable_device(pdev); 3421 if (ret) 3422 return ERR_PTR(ret); 3423 3424 trans = iwl_trans_alloc(sizeof(struct iwl_trans_pcie), &pdev->dev, ops, 3425 cfg_trans); 3426 if (!trans) 3427 return ERR_PTR(-ENOMEM); 3428 3429 trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); 3430 3431 trans_pcie->trans = trans; 3432 trans_pcie->opmode_down = true; 3433 spin_lock_init(&trans_pcie->irq_lock); 3434 spin_lock_init(&trans_pcie->reg_lock); 3435 spin_lock_init(&trans_pcie->alloc_page_lock); 3436 mutex_init(&trans_pcie->mutex); 3437 init_waitqueue_head(&trans_pcie->ucode_write_waitq); 3438 init_waitqueue_head(&trans_pcie->fw_reset_waitq); 3439 3440 trans_pcie->rba.alloc_wq = alloc_workqueue("rb_allocator", 3441 WQ_HIGHPRI | WQ_UNBOUND, 1); 3442 if (!trans_pcie->rba.alloc_wq) { 3443 ret = -ENOMEM; 3444 goto out_free_trans; 3445 } 3446 INIT_WORK(&trans_pcie->rba.rx_alloc, iwl_pcie_rx_allocator_work); 3447 3448 trans_pcie->debug_rfkill = -1; 3449 3450 if (!cfg_trans->base_params->pcie_l1_allowed) { 3451 /* 3452 * W/A - seems to solve weird behavior. We need to remove this 3453 * if we don't want to stay in L1 all the time. This wastes a 3454 * lot of power. 3455 */ 3456 pci_disable_link_state(pdev, PCIE_LINK_STATE_L0S | 3457 PCIE_LINK_STATE_L1 | 3458 PCIE_LINK_STATE_CLKPM); 3459 } 3460 3461 trans_pcie->def_rx_queue = 0; 3462 3463 pci_set_master(pdev); 3464 3465 addr_size = trans->txqs.tfd.addr_size; 3466 ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(addr_size)); 3467 if (!ret) 3468 ret = pci_set_consistent_dma_mask(pdev, 3469 DMA_BIT_MASK(addr_size)); 3470 if (ret) { 3471 ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); 3472 if (!ret) 3473 ret = pci_set_consistent_dma_mask(pdev, 3474 DMA_BIT_MASK(32)); 3475 /* both attempts failed: */ 3476 if (ret) { 3477 dev_err(&pdev->dev, "No suitable DMA available\n"); 3478 goto out_no_pci; 3479 } 3480 } 3481 3482 ret = pcim_iomap_regions_request_all(pdev, BIT(0), DRV_NAME); 3483 if (ret) { 3484 dev_err(&pdev->dev, "pcim_iomap_regions_request_all failed\n"); 3485 goto out_no_pci; 3486 } 3487 3488 trans_pcie->hw_base = pcim_iomap_table(pdev)[0]; 3489 if (!trans_pcie->hw_base) { 3490 dev_err(&pdev->dev, "pcim_iomap_table failed\n"); 3491 ret = -ENODEV; 3492 goto out_no_pci; 3493 } 3494 3495 /* We disable the RETRY_TIMEOUT register (0x41) to keep 3496 * PCI Tx retries from interfering with C3 CPU state */ 3497 pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00); 3498 3499 trans_pcie->pci_dev = pdev; 3500 iwl_disable_interrupts(trans); 3501 3502 trans->hw_rev = iwl_read32(trans, CSR_HW_REV); 3503 if (trans->hw_rev == 0xffffffff) { 3504 dev_err(&pdev->dev, "HW_REV=0xFFFFFFFF, PCI issues?\n"); 3505 ret = -EIO; 3506 goto out_no_pci; 3507 } 3508 3509 /* 3510 * In the 8000 HW family the format of the 4 bytes of CSR_HW_REV have 3511 * changed, and now the revision step also includes bit 0-1 (no more 3512 * "dash" value). To keep hw_rev backwards compatible - we'll store it 3513 * in the old format. 3514 */ 3515 if (cfg_trans->device_family >= IWL_DEVICE_FAMILY_8000) 3516 trans->hw_rev = (trans->hw_rev & 0xfff0) | 3517 (CSR_HW_REV_STEP(trans->hw_rev << 2) << 2); 3518 3519 IWL_DEBUG_INFO(trans, "HW REV: 0x%0x\n", trans->hw_rev); 3520 3521 iwl_pcie_set_interrupt_capa(pdev, trans, cfg_trans); 3522 trans->hw_id = (pdev->device << 16) + pdev->subsystem_device; 3523 snprintf(trans->hw_id_str, sizeof(trans->hw_id_str), 3524 "PCI ID: 0x%04X:0x%04X", pdev->device, pdev->subsystem_device); 3525 3526 init_waitqueue_head(&trans_pcie->sx_waitq); 3527 3528 3529 if (trans_pcie->msix_enabled) { 3530 ret = iwl_pcie_init_msix_handler(pdev, trans_pcie); 3531 if (ret) 3532 goto out_no_pci; 3533 } else { 3534 ret = iwl_pcie_alloc_ict(trans); 3535 if (ret) 3536 goto out_no_pci; 3537 3538 ret = devm_request_threaded_irq(&pdev->dev, pdev->irq, 3539 iwl_pcie_isr, 3540 iwl_pcie_irq_handler, 3541 IRQF_SHARED, DRV_NAME, trans); 3542 if (ret) { 3543 IWL_ERR(trans, "Error allocating IRQ %d\n", pdev->irq); 3544 goto out_free_ict; 3545 } 3546 } 3547 3548 #ifdef CONFIG_IWLWIFI_DEBUGFS 3549 trans_pcie->fw_mon_data.state = IWL_FW_MON_DBGFS_STATE_CLOSED; 3550 mutex_init(&trans_pcie->fw_mon_data.mutex); 3551 #endif 3552 3553 iwl_dbg_tlv_init(trans); 3554 3555 return trans; 3556 3557 out_free_ict: 3558 iwl_pcie_free_ict(trans); 3559 out_no_pci: 3560 destroy_workqueue(trans_pcie->rba.alloc_wq); 3561 out_free_trans: 3562 iwl_trans_free(trans); 3563 return ERR_PTR(ret); 3564 } 3565