drivers/net/wireless/intel/iwlwifi/pcie/trans.c

   1 /******************************************************************************
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   4  * redistributing this file, you may do so under either license.
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   6  * GPL LICENSE SUMMARY
   7  *
   8  * Copyright(c) 2007 - 2015 Intel Corporation. All rights reserved.
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  10  * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
  11  * Copyright(c) 2018 - 2019 Intel Corporation
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  32  * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
  33  * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
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  52  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  53  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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  61  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  62  *
  63  *****************************************************************************/
  64 #include <linux/pci.h>
  65 #include <linux/interrupt.h>
  66 #include <linux/debugfs.h>
  67 #include <linux/sched.h>
  68 #include <linux/bitops.h>
  69 #include <linux/gfp.h>
  70 #include <linux/vmalloc.h>
  71 #include <linux/module.h>
  72 #include <linux/wait.h>
  73
  74 #include "iwl-drv.h"
  75 #include "iwl-trans.h"
  76 #include "iwl-csr.h"
  77 #include "iwl-prph.h"
  78 #include "iwl-scd.h"
  79 #include "iwl-agn-hw.h"
  80 #include "fw/error-dump.h"
  81 #include "fw/dbg.h"
  82 #include "internal.h"
  83 #include "iwl-fh.h"
  84
  85 /* extended range in FW SRAM */
  86 #define IWL_FW_MEM_EXTENDED_START       0x40000
  87 #define IWL_FW_MEM_EXTENDED_END         0x57FFF
  88
  89 void iwl_trans_pcie_dump_regs(struct iwl_trans *trans)
  90 {
  91 #define PCI_DUMP_SIZE           352
  92 #define PCI_MEM_DUMP_SIZE       64
  93 #define PCI_PARENT_DUMP_SIZE    524
  94 #define PREFIX_LEN              32
  95         struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
  96         struct pci_dev *pdev = trans_pcie->pci_dev;
  97         u32 i, pos, alloc_size, *ptr, *buf;
  98         char *prefix;
  99
 100         if (trans_pcie->pcie_dbg_dumped_once)
 101                 return;
 102
 103         /* Should be a multiple of 4 */
 104         BUILD_BUG_ON(PCI_DUMP_SIZE > 4096 || PCI_DUMP_SIZE & 0x3);
 105         BUILD_BUG_ON(PCI_MEM_DUMP_SIZE > 4096 || PCI_MEM_DUMP_SIZE & 0x3);
 106         BUILD_BUG_ON(PCI_PARENT_DUMP_SIZE > 4096 || PCI_PARENT_DUMP_SIZE & 0x3);
 107
 108         /* Alloc a max size buffer */
 109         alloc_size = PCI_ERR_ROOT_ERR_SRC +  4 + PREFIX_LEN;
 110         alloc_size = max_t(u32, alloc_size, PCI_DUMP_SIZE + PREFIX_LEN);
 111         alloc_size = max_t(u32, alloc_size, PCI_MEM_DUMP_SIZE + PREFIX_LEN);
 112         alloc_size = max_t(u32, alloc_size, PCI_PARENT_DUMP_SIZE + PREFIX_LEN);
 113
 114         buf = kmalloc(alloc_size, GFP_ATOMIC);
 115         if (!buf)
 116                 return;
 117         prefix = (char *)buf + alloc_size - PREFIX_LEN;
 118
 119         IWL_ERR(trans, "iwlwifi transaction failed, dumping registers\n");
 120
 121         /* Print wifi device registers */
 122         sprintf(prefix, "iwlwifi %s: ", pci_name(pdev));
 123         IWL_ERR(trans, "iwlwifi device config registers:\n");
 124         for (i = 0, ptr = buf; i < PCI_DUMP_SIZE; i += 4, ptr++)
 125                 if (pci_read_config_dword(pdev, i, ptr))
 126                         goto err_read;
 127         print_hex_dump(KERN_ERR, prefix, DUMP_PREFIX_OFFSET, 32, 4, buf, i, 0);
 128
 129         IWL_ERR(trans, "iwlwifi device memory mapped registers:\n");
 130         for (i = 0, ptr = buf; i < PCI_MEM_DUMP_SIZE; i += 4, ptr++)
 131                 *ptr = iwl_read32(trans, i);
 132         print_hex_dump(KERN_ERR, prefix, DUMP_PREFIX_OFFSET, 32, 4, buf, i, 0);
 133
 134         pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_ERR);
 135         if (pos) {
 136                 IWL_ERR(trans, "iwlwifi device AER capability structure:\n");
 137                 for (i = 0, ptr = buf; i < PCI_ERR_ROOT_COMMAND; i += 4, ptr++)
 138                         if (pci_read_config_dword(pdev, pos + i, ptr))
 139                                 goto err_read;
 140                 print_hex_dump(KERN_ERR, prefix, DUMP_PREFIX_OFFSET,
 141                                32, 4, buf, i, 0);
 142         }
 143
 144         /* Print parent device registers next */
 145         if (!pdev->bus->self)
 146                 goto out;
 147
 148         pdev = pdev->bus->self;
 149         sprintf(prefix, "iwlwifi %s: ", pci_name(pdev));
 150
 151         IWL_ERR(trans, "iwlwifi parent port (%s) config registers:\n",
 152                 pci_name(pdev));
 153         for (i = 0, ptr = buf; i < PCI_PARENT_DUMP_SIZE; i += 4, ptr++)
 154                 if (pci_read_config_dword(pdev, i, ptr))
 155                         goto err_read;
 156         print_hex_dump(KERN_ERR, prefix, DUMP_PREFIX_OFFSET, 32, 4, buf, i, 0);
 157
 158         /* Print root port AER registers */
 159         pos = 0;
 160         pdev = pcie_find_root_port(pdev);
 161         if (pdev)
 162                 pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_ERR);
 163         if (pos) {
 164                 IWL_ERR(trans, "iwlwifi root port (%s) AER cap structure:\n",
 165                         pci_name(pdev));
 166                 sprintf(prefix, "iwlwifi %s: ", pci_name(pdev));
 167                 for (i = 0, ptr = buf; i <= PCI_ERR_ROOT_ERR_SRC; i += 4, ptr++)
 168                         if (pci_read_config_dword(pdev, pos + i, ptr))
 169                                 goto err_read;
 170                 print_hex_dump(KERN_ERR, prefix, DUMP_PREFIX_OFFSET, 32,
 171                                4, buf, i, 0);
 172         }
 173         goto out;
 174
 175 err_read:
 176         print_hex_dump(KERN_ERR, prefix, DUMP_PREFIX_OFFSET, 32, 4, buf, i, 0);
 177         IWL_ERR(trans, "Read failed at 0x%X\n", i);
 178 out:
 179         trans_pcie->pcie_dbg_dumped_once = 1;
 180         kfree(buf);
 181 }
 182
 183 static void iwl_trans_pcie_sw_reset(struct iwl_trans *trans)
 184 {
 185         /* Reset entire device - do controller reset (results in SHRD_HW_RST) */
 186         iwl_set_bit(trans, trans->trans_cfg->csr->addr_sw_reset,
 187                     BIT(trans->trans_cfg->csr->flag_sw_reset));
 188         usleep_range(5000, 6000);
 189 }
 190
 191 static void iwl_pcie_free_fw_monitor(struct iwl_trans *trans)
 192 {
 193         struct iwl_dram_data *fw_mon = &trans->dbg.fw_mon;
 194
 195         if (!fw_mon->size)
 196                 return;
 197
 198         dma_free_coherent(trans->dev, fw_mon->size, fw_mon->block,
 199                           fw_mon->physical);
 200
 201         fw_mon->block = NULL;
 202         fw_mon->physical = 0;
 203         fw_mon->size = 0;
 204 }
 205
 206 static void iwl_pcie_alloc_fw_monitor_block(struct iwl_trans *trans,
 207                                             u8 max_power, u8 min_power)
 208 {
 209         struct iwl_dram_data *fw_mon = &trans->dbg.fw_mon;
 210         void *block = NULL;
 211         dma_addr_t physical = 0;
 212         u32 size = 0;
 213         u8 power;
 214
 215         if (fw_mon->size)
 216                 return;
 217
 218         for (power = max_power; power >= min_power; power--) {
 219                 size = BIT(power);
 220                 block = dma_alloc_coherent(trans->dev, size, &physical,
 221                                            GFP_KERNEL | __GFP_NOWARN);
 222                 if (!block)
 223                         continue;
 224
 225                 IWL_INFO(trans,
 226                          "Allocated 0x%08x bytes for firmware monitor.\n",
 227                          size);
 228                 break;
 229         }
 230
 231         if (WARN_ON_ONCE(!block))
 232                 return;
 233
 234         if (power != max_power)
 235                 IWL_ERR(trans,
 236                         "Sorry - debug buffer is only %luK while you requested %luK\n",
 237                         (unsigned long)BIT(power - 10),
 238                         (unsigned long)BIT(max_power - 10));
 239
 240         fw_mon->block = block;
 241         fw_mon->physical = physical;
 242         fw_mon->size = size;
 243 }
 244
 245 void iwl_pcie_alloc_fw_monitor(struct iwl_trans *trans, u8 max_power)
 246 {
 247         if (!max_power) {
 248                 /* default max_power is maximum */
 249                 max_power = 26;
 250         } else {
 251                 max_power += 11;
 252         }
 253
 254         if (WARN(max_power > 26,
 255                  "External buffer size for monitor is too big %d, check the FW TLV\n",
 256                  max_power))
 257                 return;
 258
 259         if (trans->dbg.fw_mon.size)
 260                 return;
 261
 262         iwl_pcie_alloc_fw_monitor_block(trans, max_power, 11);
 263 }
 264
 265 static u32 iwl_trans_pcie_read_shr(struct iwl_trans *trans, u32 reg)
 266 {
 267         iwl_write32(trans, HEEP_CTRL_WRD_PCIEX_CTRL_REG,
 268                     ((reg & 0x0000ffff) | (2 << 28)));
 269         return iwl_read32(trans, HEEP_CTRL_WRD_PCIEX_DATA_REG);
 270 }
 271
 272 static void iwl_trans_pcie_write_shr(struct iwl_trans *trans, u32 reg, u32 val)
 273 {
 274         iwl_write32(trans, HEEP_CTRL_WRD_PCIEX_DATA_REG, val);
 275         iwl_write32(trans, HEEP_CTRL_WRD_PCIEX_CTRL_REG,
 276                     ((reg & 0x0000ffff) | (3 << 28)));
 277 }
 278
 279 static void iwl_pcie_set_pwr(struct iwl_trans *trans, bool vaux)
 280 {
 281         if (trans->cfg->apmg_not_supported)
 282                 return;
 283
 284         if (vaux && pci_pme_capable(to_pci_dev(trans->dev), PCI_D3cold))
 285                 iwl_set_bits_mask_prph(trans, APMG_PS_CTRL_REG,
 286                                        APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
 287                                        ~APMG_PS_CTRL_MSK_PWR_SRC);
 288         else
 289                 iwl_set_bits_mask_prph(trans, APMG_PS_CTRL_REG,
 290                                        APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
 291                                        ~APMG_PS_CTRL_MSK_PWR_SRC);
 292 }
 293
 294 /* PCI registers */
 295 #define PCI_CFG_RETRY_TIMEOUT   0x041
 296
 297 void iwl_pcie_apm_config(struct iwl_trans *trans)
 298 {
 299         struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
 300         u16 lctl;
 301         u16 cap;
 302
 303         /*
 304          * HW bug W/A for instability in PCIe bus L0S->L1 transition.
 305          * Check if BIOS (or OS) enabled L1-ASPM on this device.
 306          * If so (likely), disable L0S, so device moves directly L0->L1;
 307          *    costs negligible amount of power savings.
 308          * If not (unlikely), enable L0S, so there is at least some
 309          *    power savings, even without L1.
 310          */
 311         pcie_capability_read_word(trans_pcie->pci_dev, PCI_EXP_LNKCTL, &lctl);
 312         if (lctl & PCI_EXP_LNKCTL_ASPM_L1)
 313                 iwl_set_bit(trans, CSR_GIO_REG, CSR_GIO_REG_VAL_L0S_ENABLED);
 314         else
 315                 iwl_clear_bit(trans, CSR_GIO_REG, CSR_GIO_REG_VAL_L0S_ENABLED);
 316         trans->pm_support = !(lctl & PCI_EXP_LNKCTL_ASPM_L0S);
 317
 318         pcie_capability_read_word(trans_pcie->pci_dev, PCI_EXP_DEVCTL2, &cap);
 319         trans->ltr_enabled = cap & PCI_EXP_DEVCTL2_LTR_EN;
 320         IWL_DEBUG_POWER(trans, "L1 %sabled - LTR %sabled\n",
 321                         (lctl & PCI_EXP_LNKCTL_ASPM_L1) ? "En" : "Dis",
 322                         trans->ltr_enabled ? "En" : "Dis");
 323 }
 324
 325 /*
 326  * Start up NIC's basic functionality after it has been reset
 327  * (e.g. after platform boot, or shutdown via iwl_pcie_apm_stop())
 328  * NOTE:  This does not load uCode nor start the embedded processor
 329  */
 330 static int iwl_pcie_apm_init(struct iwl_trans *trans)
 331 {
 332         int ret;
 333
 334         IWL_DEBUG_INFO(trans, "Init card's basic functions\n");
 335
 336         /*
 337          * Use "set_bit" below rather than "write", to preserve any hardware
 338          * bits already set by default after reset.
 339          */
 340
 341         /* Disable L0S exit timer (platform NMI Work/Around) */
 342         if (trans->trans_cfg->device_family < IWL_DEVICE_FAMILY_8000)
 343                 iwl_set_bit(trans, CSR_GIO_CHICKEN_BITS,
 344                             CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
 345
 346         /*
 347          * Disable L0s without affecting L1;
 348          *  don't wait for ICH L0s (ICH bug W/A)
 349          */
 350         iwl_set_bit(trans, CSR_GIO_CHICKEN_BITS,
 351                     CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
 352
 353         /* Set FH wait threshold to maximum (HW error during stress W/A) */
 354         iwl_set_bit(trans, CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL);
 355
 356         /*
 357          * Enable HAP INTA (interrupt from management bus) to
 358          * wake device's PCI Express link L1a -> L0s
 359          */
 360         iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG,
 361                     CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
 362
 363         iwl_pcie_apm_config(trans);
 364
 365         /* Configure analog phase-lock-loop before activating to D0A */
 366         if (trans->trans_cfg->base_params->pll_cfg)
 367                 iwl_set_bit(trans, CSR_ANA_PLL_CFG, CSR50_ANA_PLL_CFG_VAL);
 368
 369         ret = iwl_finish_nic_init(trans, trans->trans_cfg);
 370         if (ret)
 371                 return ret;
 372
 373         if (trans->cfg->host_interrupt_operation_mode) {
 374                 /*
 375                  * This is a bit of an abuse - This is needed for 7260 / 3160
 376                  * only check host_interrupt_operation_mode even if this is
 377                  * not related to host_interrupt_operation_mode.
 378                  *
 379                  * Enable the oscillator to count wake up time for L1 exit. This
 380                  * consumes slightly more power (100uA) - but allows to be sure
 381                  * that we wake up from L1 on time.
 382                  *
 383                  * This looks weird: read twice the same register, discard the
 384                  * value, set a bit, and yet again, read that same register
 385                  * just to discard the value. But that's the way the hardware
 386                  * seems to like it.
 387                  */
 388                 iwl_read_prph(trans, OSC_CLK);
 389                 iwl_read_prph(trans, OSC_CLK);
 390                 iwl_set_bits_prph(trans, OSC_CLK, OSC_CLK_FORCE_CONTROL);
 391                 iwl_read_prph(trans, OSC_CLK);
 392                 iwl_read_prph(trans, OSC_CLK);
 393         }
 394
 395         /*
 396          * Enable DMA clock and wait for it to stabilize.
 397          *
 398          * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0"
 399          * bits do not disable clocks.  This preserves any hardware
 400          * bits already set by default in "CLK_CTRL_REG" after reset.
 401          */
 402         if (!trans->cfg->apmg_not_supported) {
 403                 iwl_write_prph(trans, APMG_CLK_EN_REG,
 404                                APMG_CLK_VAL_DMA_CLK_RQT);
 405                 udelay(20);
 406
 407                 /* Disable L1-Active */
 408                 iwl_set_bits_prph(trans, APMG_PCIDEV_STT_REG,
 409                                   APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
 410
 411                 /* Clear the interrupt in APMG if the NIC is in RFKILL */
 412                 iwl_write_prph(trans, APMG_RTC_INT_STT_REG,
 413                                APMG_RTC_INT_STT_RFKILL);
 414         }
 415
 416         set_bit(STATUS_DEVICE_ENABLED, &trans->status);
 417
 418         return 0;
 419 }
 420
 421 /*
 422  * Enable LP XTAL to avoid HW bug where device may consume much power if
 423  * FW is not loaded after device reset. LP XTAL is disabled by default
 424  * after device HW reset. Do it only if XTAL is fed by internal source.
 425  * Configure device's "persistence" mode to avoid resetting XTAL again when
 426  * SHRD_HW_RST occurs in S3.
 427  */
 428 static void iwl_pcie_apm_lp_xtal_enable(struct iwl_trans *trans)
 429 {
 430         int ret;
 431         u32 apmg_gp1_reg;
 432         u32 apmg_xtal_cfg_reg;
 433         u32 dl_cfg_reg;
 434
 435         /* Force XTAL ON */
 436         __iwl_trans_pcie_set_bit(trans, CSR_GP_CNTRL,
 437                                  CSR_GP_CNTRL_REG_FLAG_XTAL_ON);
 438
 439         iwl_trans_pcie_sw_reset(trans);
 440
 441         ret = iwl_finish_nic_init(trans, trans->trans_cfg);
 442         if (WARN_ON(ret)) {
 443                 /* Release XTAL ON request */
 444                 __iwl_trans_pcie_clear_bit(trans, CSR_GP_CNTRL,
 445                                            CSR_GP_CNTRL_REG_FLAG_XTAL_ON);
 446                 return;
 447         }
 448
 449         /*
 450          * Clear "disable persistence" to avoid LP XTAL resetting when
 451          * SHRD_HW_RST is applied in S3.
 452          */
 453         iwl_clear_bits_prph(trans, APMG_PCIDEV_STT_REG,
 454                                     APMG_PCIDEV_STT_VAL_PERSIST_DIS);
 455
 456         /*
 457          * Force APMG XTAL to be active to prevent its disabling by HW
 458          * caused by APMG idle state.
 459          */
 460         apmg_xtal_cfg_reg = iwl_trans_pcie_read_shr(trans,
 461                                                     SHR_APMG_XTAL_CFG_REG);
 462         iwl_trans_pcie_write_shr(trans, SHR_APMG_XTAL_CFG_REG,
 463                                  apmg_xtal_cfg_reg |
 464                                  SHR_APMG_XTAL_CFG_XTAL_ON_REQ);
 465
 466         iwl_trans_pcie_sw_reset(trans);
 467
 468         /* Enable LP XTAL by indirect access through CSR */
 469         apmg_gp1_reg = iwl_trans_pcie_read_shr(trans, SHR_APMG_GP1_REG);
 470         iwl_trans_pcie_write_shr(trans, SHR_APMG_GP1_REG, apmg_gp1_reg |
 471                                  SHR_APMG_GP1_WF_XTAL_LP_EN |
 472                                  SHR_APMG_GP1_CHICKEN_BIT_SELECT);
 473
 474         /* Clear delay line clock power up */
 475         dl_cfg_reg = iwl_trans_pcie_read_shr(trans, SHR_APMG_DL_CFG_REG);
 476         iwl_trans_pcie_write_shr(trans, SHR_APMG_DL_CFG_REG, dl_cfg_reg &
 477                                  ~SHR_APMG_DL_CFG_DL_CLOCK_POWER_UP);
 478
 479         /*
 480          * Enable persistence mode to avoid LP XTAL resetting when
 481          * SHRD_HW_RST is applied in S3.
 482          */
 483         iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG,
 484                     CSR_HW_IF_CONFIG_REG_PERSIST_MODE);
 485
 486         /*
 487          * Clear "initialization complete" bit to move adapter from
 488          * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
 489          */
 490         iwl_clear_bit(trans, CSR_GP_CNTRL,
 491                       BIT(trans->trans_cfg->csr->flag_init_done));
 492
 493         /* Activates XTAL resources monitor */
 494         __iwl_trans_pcie_set_bit(trans, CSR_MONITOR_CFG_REG,
 495                                  CSR_MONITOR_XTAL_RESOURCES);
 496
 497         /* Release XTAL ON request */
 498         __iwl_trans_pcie_clear_bit(trans, CSR_GP_CNTRL,
 499                                    CSR_GP_CNTRL_REG_FLAG_XTAL_ON);
 500         udelay(10);
 501
 502         /* Release APMG XTAL */
 503         iwl_trans_pcie_write_shr(trans, SHR_APMG_XTAL_CFG_REG,
 504                                  apmg_xtal_cfg_reg &
 505                                  ~SHR_APMG_XTAL_CFG_XTAL_ON_REQ);
 506 }
 507
 508 void iwl_pcie_apm_stop_master(struct iwl_trans *trans)
 509 {
 510         int ret;
 511
 512         /* stop device's busmaster DMA activity */
 513         iwl_set_bit(trans, trans->trans_cfg->csr->addr_sw_reset,
 514                     BIT(trans->trans_cfg->csr->flag_stop_master));
 515
 516         ret = iwl_poll_bit(trans, trans->trans_cfg->csr->addr_sw_reset,
 517                            BIT(trans->trans_cfg->csr->flag_master_dis),
 518                            BIT(trans->trans_cfg->csr->flag_master_dis), 100);
 519         if (ret < 0)
 520                 IWL_WARN(trans, "Master Disable Timed Out, 100 usec\n");
 521
 522         IWL_DEBUG_INFO(trans, "stop master\n");
 523 }
 524
 525 static void iwl_pcie_apm_stop(struct iwl_trans *trans, bool op_mode_leave)
 526 {
 527         IWL_DEBUG_INFO(trans, "Stop card, put in low power state\n");
 528
 529         if (op_mode_leave) {
 530                 if (!test_bit(STATUS_DEVICE_ENABLED, &trans->status))
 531                         iwl_pcie_apm_init(trans);
 532
 533                 /* inform ME that we are leaving */
 534                 if (trans->trans_cfg->device_family == IWL_DEVICE_FAMILY_7000)
 535                         iwl_set_bits_prph(trans, APMG_PCIDEV_STT_REG,
 536                                           APMG_PCIDEV_STT_VAL_WAKE_ME);
 537                 else if (trans->trans_cfg->device_family >=
 538                          IWL_DEVICE_FAMILY_8000) {
 539                         iwl_set_bit(trans, CSR_DBG_LINK_PWR_MGMT_REG,
 540                                     CSR_RESET_LINK_PWR_MGMT_DISABLED);
 541                         iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG,
 542                                     CSR_HW_IF_CONFIG_REG_PREPARE |
 543                                     CSR_HW_IF_CONFIG_REG_ENABLE_PME);
 544                         mdelay(1);
 545                         iwl_clear_bit(trans, CSR_DBG_LINK_PWR_MGMT_REG,
 546                                       CSR_RESET_LINK_PWR_MGMT_DISABLED);
 547                 }
 548                 mdelay(5);
 549         }
 550
 551         clear_bit(STATUS_DEVICE_ENABLED, &trans->status);
 552
 553         /* Stop device's DMA activity */
 554         iwl_pcie_apm_stop_master(trans);
 555
 556         if (trans->cfg->lp_xtal_workaround) {
 557                 iwl_pcie_apm_lp_xtal_enable(trans);
 558                 return;
 559         }
 560
 561         iwl_trans_pcie_sw_reset(trans);
 562
 563         /*
 564          * Clear "initialization complete" bit to move adapter from
 565          * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
 566          */
 567         iwl_clear_bit(trans, CSR_GP_CNTRL,
 568                       BIT(trans->trans_cfg->csr->flag_init_done));
 569 }
 570
 571 static int iwl_pcie_nic_init(struct iwl_trans *trans)
 572 {
 573         struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
 574         int ret;
 575
 576         /* nic_init */
 577         spin_lock(&trans_pcie->irq_lock);
 578         ret = iwl_pcie_apm_init(trans);
 579         spin_unlock(&trans_pcie->irq_lock);
 580
 581         if (ret)
 582                 return ret;
 583
 584         iwl_pcie_set_pwr(trans, false);
 585
 586         iwl_op_mode_nic_config(trans->op_mode);
 587
 588         /* Allocate the RX queue, or reset if it is already allocated */
 589         iwl_pcie_rx_init(trans);
 590
 591         /* Allocate or reset and init all Tx and Command queues */
 592         if (iwl_pcie_tx_init(trans))
 593                 return -ENOMEM;
 594
 595         if (trans->trans_cfg->base_params->shadow_reg_enable) {
 596                 /* enable shadow regs in HW */
 597                 iwl_set_bit(trans, CSR_MAC_SHADOW_REG_CTRL, 0x800FFFFF);
 598                 IWL_DEBUG_INFO(trans, "Enabling shadow registers in device\n");
 599         }
 600
 601         return 0;
 602 }
 603
 604 #define HW_READY_TIMEOUT (50)
 605
 606 /* Note: returns poll_bit return value, which is >= 0 if success */
 607 static int iwl_pcie_set_hw_ready(struct iwl_trans *trans)
 608 {
 609         int ret;
 610
 611         iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG,
 612                     CSR_HW_IF_CONFIG_REG_BIT_NIC_READY);
 613
 614         /* See if we got it */
 615         ret = iwl_poll_bit(trans, CSR_HW_IF_CONFIG_REG,
 616                            CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
 617                            CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
 618                            HW_READY_TIMEOUT);
 619
 620         if (ret >= 0)
 621                 iwl_set_bit(trans, CSR_MBOX_SET_REG, CSR_MBOX_SET_REG_OS_ALIVE);
 622
 623         IWL_DEBUG_INFO(trans, "hardware%s ready\n", ret < 0 ? " not" : "");
 624         return ret;
 625 }
 626
 627 /* Note: returns standard 0/-ERROR code */
 628 int iwl_pcie_prepare_card_hw(struct iwl_trans *trans)
 629 {
 630         int ret;
 631         int t = 0;
 632         int iter;
 633
 634         IWL_DEBUG_INFO(trans, "iwl_trans_prepare_card_hw enter\n");
 635
 636         ret = iwl_pcie_set_hw_ready(trans);
 637         /* If the card is ready, exit 0 */
 638         if (ret >= 0)
 639                 return 0;
 640
 641         iwl_set_bit(trans, CSR_DBG_LINK_PWR_MGMT_REG,
 642                     CSR_RESET_LINK_PWR_MGMT_DISABLED);
 643         usleep_range(1000, 2000);
 644
 645         for (iter = 0; iter < 10; iter++) {
 646                 /* If HW is not ready, prepare the conditions to check again */
 647                 iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG,
 648                             CSR_HW_IF_CONFIG_REG_PREPARE);
 649
 650                 do {
 651                         ret = iwl_pcie_set_hw_ready(trans);
 652                         if (ret >= 0)
 653                                 return 0;
 654
 655                         usleep_range(200, 1000);
 656                         t += 200;
 657                 } while (t < 150000);
 658                 msleep(25);
 659         }
 660
 661         IWL_ERR(trans, "Couldn't prepare the card\n");
 662
 663         return ret;
 664 }
 665
 666 /*
 667  * ucode
 668  */
 669 static void iwl_pcie_load_firmware_chunk_fh(struct iwl_trans *trans,
 670                                             u32 dst_addr, dma_addr_t phy_addr,
 671                                             u32 byte_cnt)
 672 {
 673         iwl_write32(trans, FH_TCSR_CHNL_TX_CONFIG_REG(FH_SRVC_CHNL),
 674                     FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_PAUSE);
 675
 676         iwl_write32(trans, FH_SRVC_CHNL_SRAM_ADDR_REG(FH_SRVC_CHNL),
 677                     dst_addr);
 678
 679         iwl_write32(trans, FH_TFDIB_CTRL0_REG(FH_SRVC_CHNL),
 680                     phy_addr & FH_MEM_TFDIB_DRAM_ADDR_LSB_MSK);
 681
 682         iwl_write32(trans, FH_TFDIB_CTRL1_REG(FH_SRVC_CHNL),
 683                     (iwl_get_dma_hi_addr(phy_addr)
 684                         << FH_MEM_TFDIB_REG1_ADDR_BITSHIFT) | byte_cnt);
 685
 686         iwl_write32(trans, FH_TCSR_CHNL_TX_BUF_STS_REG(FH_SRVC_CHNL),
 687                     BIT(FH_TCSR_CHNL_TX_BUF_STS_REG_POS_TB_NUM) |
 688                     BIT(FH_TCSR_CHNL_TX_BUF_STS_REG_POS_TB_IDX) |
 689                     FH_TCSR_CHNL_TX_BUF_STS_REG_VAL_TFDB_VALID);
 690
 691         iwl_write32(trans, FH_TCSR_CHNL_TX_CONFIG_REG(FH_SRVC_CHNL),
 692                     FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE |
 693                     FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_DISABLE |
 694                     FH_TCSR_TX_CONFIG_REG_VAL_CIRQ_HOST_ENDTFD);
 695 }
 696
 697 static int iwl_pcie_load_firmware_chunk(struct iwl_trans *trans,
 698                                         u32 dst_addr, dma_addr_t phy_addr,
 699                                         u32 byte_cnt)
 700 {
 701         struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
 702         unsigned long flags;
 703         int ret;
 704
 705         trans_pcie->ucode_write_complete = false;
 706
 707         if (!iwl_trans_grab_nic_access(trans, &flags))
 708                 return -EIO;
 709
 710         iwl_pcie_load_firmware_chunk_fh(trans, dst_addr, phy_addr,
 711                                         byte_cnt);
 712         iwl_trans_release_nic_access(trans, &flags);
 713
 714         ret = wait_event_timeout(trans_pcie->ucode_write_waitq,
 715                                  trans_pcie->ucode_write_complete, 5 * HZ);
 716         if (!ret) {
 717                 IWL_ERR(trans, "Failed to load firmware chunk!\n");
 718                 iwl_trans_pcie_dump_regs(trans);
 719                 return -ETIMEDOUT;
 720         }
 721
 722         return 0;
 723 }
 724
 725 static int iwl_pcie_load_section(struct iwl_trans *trans, u8 section_num,
 726                             const struct fw_desc *section)
 727 {
 728         u8 *v_addr;
 729         dma_addr_t p_addr;
 730         u32 offset, chunk_sz = min_t(u32, FH_MEM_TB_MAX_LENGTH, section->len);
 731         int ret = 0;
 732
 733         IWL_DEBUG_FW(trans, "[%d] uCode section being loaded...\n",
 734                      section_num);
 735
 736         v_addr = dma_alloc_coherent(trans->dev, chunk_sz, &p_addr,
 737                                     GFP_KERNEL | __GFP_NOWARN);
 738         if (!v_addr) {
 739                 IWL_DEBUG_INFO(trans, "Falling back to small chunks of DMA\n");
 740                 chunk_sz = PAGE_SIZE;
 741                 v_addr = dma_alloc_coherent(trans->dev, chunk_sz,
 742                                             &p_addr, GFP_KERNEL);
 743                 if (!v_addr)
 744                         return -ENOMEM;
 745         }
 746
 747         for (offset = 0; offset < section->len; offset += chunk_sz) {
 748                 u32 copy_size, dst_addr;
 749                 bool extended_addr = false;
 750
 751                 copy_size = min_t(u32, chunk_sz, section->len - offset);
 752                 dst_addr = section->offset + offset;
 753
 754                 if (dst_addr >= IWL_FW_MEM_EXTENDED_START &&
 755                     dst_addr <= IWL_FW_MEM_EXTENDED_END)
 756                         extended_addr = true;
 757
 758                 if (extended_addr)
 759                         iwl_set_bits_prph(trans, LMPM_CHICK,
 760                                           LMPM_CHICK_EXTENDED_ADDR_SPACE);
 761
 762                 memcpy(v_addr, (u8 *)section->data + offset, copy_size);
 763                 ret = iwl_pcie_load_firmware_chunk(trans, dst_addr, p_addr,
 764                                                    copy_size);
 765
 766                 if (extended_addr)
 767                         iwl_clear_bits_prph(trans, LMPM_CHICK,
 768                                             LMPM_CHICK_EXTENDED_ADDR_SPACE);
 769
 770                 if (ret) {
 771                         IWL_ERR(trans,
 772                                 "Could not load the [%d] uCode section\n",
 773                                 section_num);
 774                         break;
 775                 }
 776         }
 777
 778         dma_free_coherent(trans->dev, chunk_sz, v_addr, p_addr);
 779         return ret;
 780 }
 781
 782 static int iwl_pcie_load_cpu_sections_8000(struct iwl_trans *trans,
 783                                            const struct fw_img *image,
 784                                            int cpu,
 785                                            int *first_ucode_section)
 786 {
 787         int shift_param;
 788         int i, ret = 0, sec_num = 0x1;
 789         u32 val, last_read_idx = 0;
 790
 791         if (cpu == 1) {
 792                 shift_param = 0;
 793                 *first_ucode_section = 0;
 794         } else {
 795                 shift_param = 16;
 796                 (*first_ucode_section)++;
 797         }
 798
 799         for (i = *first_ucode_section; i < image->num_sec; i++) {
 800                 last_read_idx = i;
 801
 802                 /*
 803                  * CPU1_CPU2_SEPARATOR_SECTION delimiter - separate between
 804                  * CPU1 to CPU2.
 805                  * PAGING_SEPARATOR_SECTION delimiter - separate between
 806                  * CPU2 non paged to CPU2 paging sec.
 807                  */
 808                 if (!image->sec[i].data ||
 809                     image->sec[i].offset == CPU1_CPU2_SEPARATOR_SECTION ||
 810                     image->sec[i].offset == PAGING_SEPARATOR_SECTION) {
 811                         IWL_DEBUG_FW(trans,
 812                                      "Break since Data not valid or Empty section, sec = %d\n",
 813                                      i);
 814                         break;
 815                 }
 816
 817                 ret = iwl_pcie_load_section(trans, i, &image->sec[i]);
 818                 if (ret)
 819                         return ret;
 820
 821                 /* Notify ucode of loaded section number and status */
 822                 val = iwl_read_direct32(trans, FH_UCODE_LOAD_STATUS);
 823                 val = val | (sec_num << shift_param);
 824                 iwl_write_direct32(trans, FH_UCODE_LOAD_STATUS, val);
 825
 826                 sec_num = (sec_num << 1) | 0x1;
 827         }
 828
 829         *first_ucode_section = last_read_idx;
 830
 831         iwl_enable_interrupts(trans);
 832
 833         if (trans->trans_cfg->use_tfh) {
 834                 if (cpu == 1)
 835                         iwl_write_prph(trans, UREG_UCODE_LOAD_STATUS,
 836                                        0xFFFF);
 837                 else
 838                         iwl_write_prph(trans, UREG_UCODE_LOAD_STATUS,
 839                                        0xFFFFFFFF);
 840         } else {
 841                 if (cpu == 1)
 842                         iwl_write_direct32(trans, FH_UCODE_LOAD_STATUS,
 843                                            0xFFFF);
 844                 else
 845                         iwl_write_direct32(trans, FH_UCODE_LOAD_STATUS,
 846                                            0xFFFFFFFF);
 847         }
 848
 849         return 0;
 850 }
 851
 852 static int iwl_pcie_load_cpu_sections(struct iwl_trans *trans,
 853                                       const struct fw_img *image,
 854                                       int cpu,
 855                                       int *first_ucode_section)
 856 {
 857         int i, ret = 0;
 858         u32 last_read_idx = 0;
 859
 860         if (cpu == 1)
 861                 *first_ucode_section = 0;
 862         else
 863                 (*first_ucode_section)++;
 864
 865         for (i = *first_ucode_section; i < image->num_sec; i++) {
 866                 last_read_idx = i;
 867
 868                 /*
 869                  * CPU1_CPU2_SEPARATOR_SECTION delimiter - separate between
 870                  * CPU1 to CPU2.
 871                  * PAGING_SEPARATOR_SECTION delimiter - separate between
 872                  * CPU2 non paged to CPU2 paging sec.
 873                  */
 874                 if (!image->sec[i].data ||
 875                     image->sec[i].offset == CPU1_CPU2_SEPARATOR_SECTION ||
 876                     image->sec[i].offset == PAGING_SEPARATOR_SECTION) {
 877                         IWL_DEBUG_FW(trans,
 878                                      "Break since Data not valid or Empty section, sec = %d\n",
 879                                      i);
 880                         break;
 881                 }
 882
 883                 ret = iwl_pcie_load_section(trans, i, &image->sec[i]);
 884                 if (ret)
 885                         return ret;
 886         }
 887
 888         *first_ucode_section = last_read_idx;
 889
 890         return 0;
 891 }
 892
 893 static void iwl_pcie_apply_destination_ini(struct iwl_trans *trans)
 894 {
 895         enum iwl_fw_ini_allocation_id alloc_id = IWL_FW_INI_ALLOCATION_ID_DBGC1;
 896         struct iwl_fw_ini_allocation_tlv *fw_mon_cfg =
 897                 &trans->dbg.fw_mon_cfg[alloc_id];
 898         struct iwl_dram_data *frag;
 899
 900         if (!iwl_trans_dbg_ini_valid(trans))
 901                 return;
 902
 903         if (le32_to_cpu(fw_mon_cfg->buf_location) ==
 904             IWL_FW_INI_LOCATION_SRAM_PATH) {
 905                 IWL_DEBUG_FW(trans, "WRT: Applying SMEM buffer destination\n");
 906                 /* set sram monitor by enabling bit 7 */
 907                 iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG,
 908                             CSR_HW_IF_CONFIG_REG_BIT_MONITOR_SRAM);
 909
 910                 return;
 911         }
 912
 913         if (le32_to_cpu(fw_mon_cfg->buf_location) !=
 914             IWL_FW_INI_LOCATION_DRAM_PATH ||
 915             !trans->dbg.fw_mon_ini[alloc_id].num_frags)
 916                 return;
 917
 918         frag = &trans->dbg.fw_mon_ini[alloc_id].frags[0];
 919
 920         IWL_DEBUG_FW(trans, "WRT: Applying DRAM destination (alloc_id=%u)\n",
 921                      alloc_id);
 922
 923         iwl_write_umac_prph(trans, MON_BUFF_BASE_ADDR_VER2,
 924                             frag->physical >> MON_BUFF_SHIFT_VER2);
 925         iwl_write_umac_prph(trans, MON_BUFF_END_ADDR_VER2,
 926                             (frag->physical + frag->size - 256) >>
 927                             MON_BUFF_SHIFT_VER2);
 928 }
 929
 930 void iwl_pcie_apply_destination(struct iwl_trans *trans)
 931 {
 932         const struct iwl_fw_dbg_dest_tlv_v1 *dest = trans->dbg.dest_tlv;
 933         const struct iwl_dram_data *fw_mon = &trans->dbg.fw_mon;
 934         int i;
 935
 936         if (iwl_trans_dbg_ini_valid(trans)) {
 937                 iwl_pcie_apply_destination_ini(trans);
 938                 return;
 939         }
 940
 941         IWL_INFO(trans, "Applying debug destination %s\n",
 942                  get_fw_dbg_mode_string(dest->monitor_mode));
 943
 944         if (dest->monitor_mode == EXTERNAL_MODE)
 945                 iwl_pcie_alloc_fw_monitor(trans, dest->size_power);
 946         else
 947                 IWL_WARN(trans, "PCI should have external buffer debug\n");
 948
 949         for (i = 0; i < trans->dbg.n_dest_reg; i++) {
 950                 u32 addr = le32_to_cpu(dest->reg_ops[i].addr);
 951                 u32 val = le32_to_cpu(dest->reg_ops[i].val);
 952
 953                 switch (dest->reg_ops[i].op) {
 954                 case CSR_ASSIGN:
 955                         iwl_write32(trans, addr, val);
 956                         break;
 957                 case CSR_SETBIT:
 958                         iwl_set_bit(trans, addr, BIT(val));
 959                         break;
 960                 case CSR_CLEARBIT:
 961                         iwl_clear_bit(trans, addr, BIT(val));
 962                         break;
 963                 case PRPH_ASSIGN:
 964                         iwl_write_prph(trans, addr, val);
 965                         break;
 966                 case PRPH_SETBIT:
 967                         iwl_set_bits_prph(trans, addr, BIT(val));
 968                         break;
 969                 case PRPH_CLEARBIT:
 970                         iwl_clear_bits_prph(trans, addr, BIT(val));
 971                         break;
 972                 case PRPH_BLOCKBIT:
 973                         if (iwl_read_prph(trans, addr) & BIT(val)) {
 974                                 IWL_ERR(trans,
 975                                         "BIT(%u) in address 0x%x is 1, stopping FW configuration\n",
 976                                         val, addr);
 977                                 goto monitor;
 978                         }
 979                         break;
 980                 default:
 981                         IWL_ERR(trans, "FW debug - unknown OP %d\n",
 982                                 dest->reg_ops[i].op);
 983                         break;
 984                 }
 985         }
 986
 987 monitor:
 988         if (dest->monitor_mode == EXTERNAL_MODE && fw_mon->size) {
 989                 iwl_write_prph(trans, le32_to_cpu(dest->base_reg),
 990                                fw_mon->physical >> dest->base_shift);
 991                 if (trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_8000)
 992                         iwl_write_prph(trans, le32_to_cpu(dest->end_reg),
 993                                        (fw_mon->physical + fw_mon->size -
 994                                         256) >> dest->end_shift);
 995                 else
 996                         iwl_write_prph(trans, le32_to_cpu(dest->end_reg),
 997                                        (fw_mon->physical + fw_mon->size) >>
 998                                        dest->end_shift);
 999         }
1000 }
1001
1002 static int iwl_pcie_load_given_ucode(struct iwl_trans *trans,
1003                                 const struct fw_img *image)
1004 {
1005         int ret = 0;
1006         int first_ucode_section;
1007
1008         IWL_DEBUG_FW(trans, "working with %s CPU\n",
1009                      image->is_dual_cpus ? "Dual" : "Single");
1010
1011         /* load to FW the binary non secured sections of CPU1 */
1012         ret = iwl_pcie_load_cpu_sections(trans, image, 1, &first_ucode_section);
1013         if (ret)
1014                 return ret;
1015
1016         if (image->is_dual_cpus) {
1017                 /* set CPU2 header address */
1018                 iwl_write_prph(trans,
1019                                LMPM_SECURE_UCODE_LOAD_CPU2_HDR_ADDR,
1020                                LMPM_SECURE_CPU2_HDR_MEM_SPACE);
1021
1022                 /* load to FW the binary sections of CPU2 */
1023                 ret = iwl_pcie_load_cpu_sections(trans, image, 2,
1024                                                  &first_ucode_section);
1025                 if (ret)
1026                         return ret;
1027         }
1028
1029         /* supported for 7000 only for the moment */
1030         if (iwlwifi_mod_params.fw_monitor &&
1031             trans->trans_cfg->device_family == IWL_DEVICE_FAMILY_7000) {
1032                 struct iwl_dram_data *fw_mon = &trans->dbg.fw_mon;
1033
1034                 iwl_pcie_alloc_fw_monitor(trans, 0);
1035                 if (fw_mon->size) {
1036                         iwl_write_prph(trans, MON_BUFF_BASE_ADDR,
1037                                        fw_mon->physical >> 4);
1038                         iwl_write_prph(trans, MON_BUFF_END_ADDR,
1039                                        (fw_mon->physical + fw_mon->size) >> 4);
1040                 }
1041         } else if (iwl_pcie_dbg_on(trans)) {
1042                 iwl_pcie_apply_destination(trans);
1043         }
1044
1045         iwl_enable_interrupts(trans);
1046
1047         /* release CPU reset */
1048         iwl_write32(trans, CSR_RESET, 0);
1049
1050         return 0;
1051 }
1052
1053 static int iwl_pcie_load_given_ucode_8000(struct iwl_trans *trans,
1054                                           const struct fw_img *image)
1055 {
1056         int ret = 0;
1057         int first_ucode_section;
1058
1059         IWL_DEBUG_FW(trans, "working with %s CPU\n",
1060                      image->is_dual_cpus ? "Dual" : "Single");
1061
1062         if (iwl_pcie_dbg_on(trans))
1063                 iwl_pcie_apply_destination(trans);
1064
1065         IWL_DEBUG_POWER(trans, "Original WFPM value = 0x%08X\n",
1066                         iwl_read_prph(trans, WFPM_GP2));
1067
1068         /*
1069          * Set default value. On resume reading the values that were
1070          * zeored can provide debug data on the resume flow.
1071          * This is for debugging only and has no functional impact.
1072          */
1073         iwl_write_prph(trans, WFPM_GP2, 0x01010101);
1074
1075         /* configure the ucode to be ready to get the secured image */
1076         /* release CPU reset */
1077         iwl_write_prph(trans, RELEASE_CPU_RESET, RELEASE_CPU_RESET_BIT);
1078
1079         /* load to FW the binary Secured sections of CPU1 */
1080         ret = iwl_pcie_load_cpu_sections_8000(trans, image, 1,
1081                                               &first_ucode_section);
1082         if (ret)
1083                 return ret;
1084
1085         /* load to FW the binary sections of CPU2 */
1086         return iwl_pcie_load_cpu_sections_8000(trans, image, 2,
1087                                                &first_ucode_section);
1088 }
1089
1090 bool iwl_pcie_check_hw_rf_kill(struct iwl_trans *trans)
1091 {
1092         struct iwl_trans_pcie *trans_pcie =  IWL_TRANS_GET_PCIE_TRANS(trans);
1093         bool hw_rfkill = iwl_is_rfkill_set(trans);
1094         bool prev = test_bit(STATUS_RFKILL_OPMODE, &trans->status);
1095         bool report;
1096
1097         if (hw_rfkill) {
1098                 set_bit(STATUS_RFKILL_HW, &trans->status);
1099                 set_bit(STATUS_RFKILL_OPMODE, &trans->status);
1100         } else {
1101                 clear_bit(STATUS_RFKILL_HW, &trans->status);
1102                 if (trans_pcie->opmode_down)
1103                         clear_bit(STATUS_RFKILL_OPMODE, &trans->status);
1104         }
1105
1106         report = test_bit(STATUS_RFKILL_OPMODE, &trans->status);
1107
1108         if (prev != report)
1109                 iwl_trans_pcie_rf_kill(trans, report);
1110
1111         return hw_rfkill;
1112 }
1113
1114 struct iwl_causes_list {
1115         u32 cause_num;
1116         u32 mask_reg;
1117         u8 addr;
1118 };
1119
1120 static struct iwl_causes_list causes_list[] = {
1121         {MSIX_FH_INT_CAUSES_D2S_CH0_NUM,        CSR_MSIX_FH_INT_MASK_AD, 0},
1122         {MSIX_FH_INT_CAUSES_D2S_CH1_NUM,        CSR_MSIX_FH_INT_MASK_AD, 0x1},
1123         {MSIX_FH_INT_CAUSES_S2D,                CSR_MSIX_FH_INT_MASK_AD, 0x3},
1124         {MSIX_FH_INT_CAUSES_FH_ERR,             CSR_MSIX_FH_INT_MASK_AD, 0x5},
1125         {MSIX_HW_INT_CAUSES_REG_ALIVE,          CSR_MSIX_HW_INT_MASK_AD, 0x10},
1126         {MSIX_HW_INT_CAUSES_REG_WAKEUP,         CSR_MSIX_HW_INT_MASK_AD, 0x11},
1127         {MSIX_HW_INT_CAUSES_REG_IML,            CSR_MSIX_HW_INT_MASK_AD, 0x12},
1128         {MSIX_HW_INT_CAUSES_REG_CT_KILL,        CSR_MSIX_HW_INT_MASK_AD, 0x16},
1129         {MSIX_HW_INT_CAUSES_REG_RF_KILL,        CSR_MSIX_HW_INT_MASK_AD, 0x17},
1130         {MSIX_HW_INT_CAUSES_REG_PERIODIC,       CSR_MSIX_HW_INT_MASK_AD, 0x18},
1131         {MSIX_HW_INT_CAUSES_REG_SW_ERR,         CSR_MSIX_HW_INT_MASK_AD, 0x29},
1132         {MSIX_HW_INT_CAUSES_REG_SCD,            CSR_MSIX_HW_INT_MASK_AD, 0x2A},
1133         {MSIX_HW_INT_CAUSES_REG_FH_TX,          CSR_MSIX_HW_INT_MASK_AD, 0x2B},
1134         {MSIX_HW_INT_CAUSES_REG_HW_ERR,         CSR_MSIX_HW_INT_MASK_AD, 0x2D},
1135         {MSIX_HW_INT_CAUSES_REG_HAP,            CSR_MSIX_HW_INT_MASK_AD, 0x2E},
1136 };
1137
1138 static void iwl_pcie_map_non_rx_causes(struct iwl_trans *trans)
1139 {
1140         struct iwl_trans_pcie *trans_pcie =  IWL_TRANS_GET_PCIE_TRANS(trans);
1141         int val = trans_pcie->def_irq | MSIX_NON_AUTO_CLEAR_CAUSE;
1142         int i, arr_size = ARRAY_SIZE(causes_list);
1143         struct iwl_causes_list *causes = causes_list;
1144
1145         /*
1146          * Access all non RX causes and map them to the default irq.
1147          * In case we are missing at least one interrupt vector,
1148          * the first interrupt vector will serve non-RX and FBQ causes.
1149          */
1150         for (i = 0; i < arr_size; i++) {
1151                 iwl_write8(trans, CSR_MSIX_IVAR(causes[i].addr), val);
1152                 iwl_clear_bit(trans, causes[i].mask_reg,
1153                               causes[i].cause_num);
1154         }
1155 }
1156
1157 static void iwl_pcie_map_rx_causes(struct iwl_trans *trans)
1158 {
1159         struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1160         u32 offset =
1161                 trans_pcie->shared_vec_mask & IWL_SHARED_IRQ_FIRST_RSS ? 1 : 0;
1162         u32 val, idx;
1163
1164         /*
1165          * The first RX queue - fallback queue, which is designated for
1166          * management frame, command responses etc, is always mapped to the
1167          * first interrupt vector. The other RX queues are mapped to
1168          * the other (N - 2) interrupt vectors.
1169          */
1170         val = BIT(MSIX_FH_INT_CAUSES_Q(0));
1171         for (idx = 1; idx < trans->num_rx_queues; idx++) {
1172                 iwl_write8(trans, CSR_MSIX_RX_IVAR(idx),
1173                            MSIX_FH_INT_CAUSES_Q(idx - offset));
1174                 val |= BIT(MSIX_FH_INT_CAUSES_Q(idx));
1175         }
1176         iwl_write32(trans, CSR_MSIX_FH_INT_MASK_AD, ~val);
1177
1178         val = MSIX_FH_INT_CAUSES_Q(0);
1179         if (trans_pcie->shared_vec_mask & IWL_SHARED_IRQ_NON_RX)
1180                 val |= MSIX_NON_AUTO_CLEAR_CAUSE;
1181         iwl_write8(trans, CSR_MSIX_RX_IVAR(0), val);
1182
1183         if (trans_pcie->shared_vec_mask & IWL_SHARED_IRQ_FIRST_RSS)
1184                 iwl_write8(trans, CSR_MSIX_RX_IVAR(1), val);
1185 }
1186
1187 void iwl_pcie_conf_msix_hw(struct iwl_trans_pcie *trans_pcie)
1188 {
1189         struct iwl_trans *trans = trans_pcie->trans;
1190
1191         if (!trans_pcie->msix_enabled) {
1192                 if (trans->trans_cfg->mq_rx_supported &&
1193                     test_bit(STATUS_DEVICE_ENABLED, &trans->status))
1194                         iwl_write_umac_prph(trans, UREG_CHICK,
1195                                             UREG_CHICK_MSI_ENABLE);
1196                 return;
1197         }
1198         /*
1199          * The IVAR table needs to be configured again after reset,
1200          * but if the device is disabled, we can't write to
1201          * prph.
1202          */
1203         if (test_bit(STATUS_DEVICE_ENABLED, &trans->status))
1204                 iwl_write_umac_prph(trans, UREG_CHICK, UREG_CHICK_MSIX_ENABLE);
1205
1206         /*
1207          * Each cause from the causes list above and the RX causes is
1208          * represented as a byte in the IVAR table. The first nibble
1209          * represents the bound interrupt vector of the cause, the second
1210          * represents no auto clear for this cause. This will be set if its
1211          * interrupt vector is bound to serve other causes.
1212          */
1213         iwl_pcie_map_rx_causes(trans);
1214
1215         iwl_pcie_map_non_rx_causes(trans);
1216 }
1217
1218 static void iwl_pcie_init_msix(struct iwl_trans_pcie *trans_pcie)
1219 {
1220         struct iwl_trans *trans = trans_pcie->trans;
1221
1222         iwl_pcie_conf_msix_hw(trans_pcie);
1223
1224         if (!trans_pcie->msix_enabled)
1225                 return;
1226
1227         trans_pcie->fh_init_mask = ~iwl_read32(trans, CSR_MSIX_FH_INT_MASK_AD);
1228         trans_pcie->fh_mask = trans_pcie->fh_init_mask;
1229         trans_pcie->hw_init_mask = ~iwl_read32(trans, CSR_MSIX_HW_INT_MASK_AD);
1230         trans_pcie->hw_mask = trans_pcie->hw_init_mask;
1231 }
1232
1233 static void _iwl_trans_pcie_stop_device(struct iwl_trans *trans)
1234 {
1235         struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1236
1237         lockdep_assert_held(&trans_pcie->mutex);
1238
1239         if (trans_pcie->is_down)
1240                 return;
1241
1242         trans_pcie->is_down = true;
1243
1244         /* tell the device to stop sending interrupts */
1245         iwl_disable_interrupts(trans);
1246
1247         /* device going down, Stop using ICT table */
1248         iwl_pcie_disable_ict(trans);
1249
1250         /*
1251          * If a HW restart happens during firmware loading,
1252          * then the firmware loading might call this function
1253          * and later it might be called again due to the
1254          * restart. So don't process again if the device is
1255          * already dead.
1256          */
1257         if (test_and_clear_bit(STATUS_DEVICE_ENABLED, &trans->status)) {
1258                 IWL_DEBUG_INFO(trans,
1259                                "DEVICE_ENABLED bit was set and is now cleared\n");
1260                 iwl_pcie_tx_stop(trans);
1261                 iwl_pcie_rx_stop(trans);
1262
1263                 /* Power-down device's busmaster DMA clocks */
1264                 if (!trans->cfg->apmg_not_supported) {
1265                         iwl_write_prph(trans, APMG_CLK_DIS_REG,
1266                                        APMG_CLK_VAL_DMA_CLK_RQT);
1267                         udelay(5);
1268                 }
1269         }
1270
1271         /* Make sure (redundant) we've released our request to stay awake */
1272         iwl_clear_bit(trans, CSR_GP_CNTRL,
1273                       BIT(trans->trans_cfg->csr->flag_mac_access_req));
1274
1275         /* Stop the device, and put it in low power state */
1276         iwl_pcie_apm_stop(trans, false);
1277
1278         iwl_trans_pcie_sw_reset(trans);
1279
1280         /*
1281          * Upon stop, the IVAR table gets erased, so msi-x won't
1282          * work. This causes a bug in RF-KILL flows, since the interrupt
1283          * that enables radio won't fire on the correct irq, and the
1284          * driver won't be able to handle the interrupt.
1285          * Configure the IVAR table again after reset.
1286          */
1287         iwl_pcie_conf_msix_hw(trans_pcie);
1288
1289         /*
1290          * Upon stop, the APM issues an interrupt if HW RF kill is set.
1291          * This is a bug in certain verions of the hardware.
1292          * Certain devices also keep sending HW RF kill interrupt all
1293          * the time, unless the interrupt is ACKed even if the interrupt
1294          * should be masked. Re-ACK all the interrupts here.
1295          */
1296         iwl_disable_interrupts(trans);
1297
1298         /* clear all status bits */
1299         clear_bit(STATUS_SYNC_HCMD_ACTIVE, &trans->status);
1300         clear_bit(STATUS_INT_ENABLED, &trans->status);
1301         clear_bit(STATUS_TPOWER_PMI, &trans->status);
1302
1303         /*
1304          * Even if we stop the HW, we still want the RF kill
1305          * interrupt
1306          */
1307         iwl_enable_rfkill_int(trans);
1308
1309         /* re-take ownership to prevent other users from stealing the device */
1310         iwl_pcie_prepare_card_hw(trans);
1311 }
1312
1313 void iwl_pcie_synchronize_irqs(struct iwl_trans *trans)
1314 {
1315         struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1316
1317         if (trans_pcie->msix_enabled) {
1318                 int i;
1319
1320                 for (i = 0; i < trans_pcie->alloc_vecs; i++)
1321                         synchronize_irq(trans_pcie->msix_entries[i].vector);
1322         } else {
1323                 synchronize_irq(trans_pcie->pci_dev->irq);
1324         }
1325 }
1326
1327 static int iwl_trans_pcie_start_fw(struct iwl_trans *trans,
1328                                    const struct fw_img *fw, bool run_in_rfkill)
1329 {
1330         struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1331         bool hw_rfkill;
1332         int ret;
1333
1334         /* This may fail if AMT took ownership of the device */
1335         if (iwl_pcie_prepare_card_hw(trans)) {
1336                 IWL_WARN(trans, "Exit HW not ready\n");
1337                 ret = -EIO;
1338                 goto out;
1339         }
1340
1341         iwl_enable_rfkill_int(trans);
1342
1343         iwl_write32(trans, CSR_INT, 0xFFFFFFFF);
1344
1345         /*
1346          * We enabled the RF-Kill interrupt and the handler may very
1347          * well be running. Disable the interrupts to make sure no other
1348          * interrupt can be fired.
1349          */
1350         iwl_disable_interrupts(trans);
1351
1352         /* Make sure it finished running */
1353         iwl_pcie_synchronize_irqs(trans);
1354
1355         mutex_lock(&trans_pcie->mutex);
1356
1357         /* If platform's RF_KILL switch is NOT set to KILL */
1358         hw_rfkill = iwl_pcie_check_hw_rf_kill(trans);
1359         if (hw_rfkill && !run_in_rfkill) {
1360                 ret = -ERFKILL;
1361                 goto out;
1362         }
1363
1364         /* Someone called stop_device, don't try to start_fw */
1365         if (trans_pcie->is_down) {
1366                 IWL_WARN(trans,
1367                          "Can't start_fw since the HW hasn't been started\n");
1368                 ret = -EIO;
1369                 goto out;
1370         }
1371
1372         /* make sure rfkill handshake bits are cleared */
1373         iwl_write32(trans, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1374         iwl_write32(trans, CSR_UCODE_DRV_GP1_CLR,
1375                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
1376
1377         /* clear (again), then enable host interrupts */
1378         iwl_write32(trans, CSR_INT, 0xFFFFFFFF);
1379
1380         ret = iwl_pcie_nic_init(trans);
1381         if (ret) {
1382                 IWL_ERR(trans, "Unable to init nic\n");
1383                 goto out;
1384         }
1385
1386         /*
1387          * Now, we load the firmware and don't want to be interrupted, even
1388          * by the RF-Kill interrupt (hence mask all the interrupt besides the
1389          * FH_TX interrupt which is needed to load the firmware). If the
1390          * RF-Kill switch is toggled, we will find out after having loaded
1391          * the firmware and return the proper value to the caller.
1392          */
1393         iwl_enable_fw_load_int(trans);
1394
1395         /* really make sure rfkill handshake bits are cleared */
1396         iwl_write32(trans, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1397         iwl_write32(trans, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1398
1399         /* Load the given image to the HW */
1400         if (trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_8000)
1401                 ret = iwl_pcie_load_given_ucode_8000(trans, fw);
1402         else
1403                 ret = iwl_pcie_load_given_ucode(trans, fw);
1404
1405         /* re-check RF-Kill state since we may have missed the interrupt */
1406         hw_rfkill = iwl_pcie_check_hw_rf_kill(trans);
1407         if (hw_rfkill && !run_in_rfkill)
1408                 ret = -ERFKILL;
1409
1410 out:
1411         mutex_unlock(&trans_pcie->mutex);
1412         return ret;
1413 }
1414
1415 static void iwl_trans_pcie_fw_alive(struct iwl_trans *trans, u32 scd_addr)
1416 {
1417         iwl_pcie_reset_ict(trans);
1418         iwl_pcie_tx_start(trans, scd_addr);
1419 }
1420
1421 void iwl_trans_pcie_handle_stop_rfkill(struct iwl_trans *trans,
1422                                        bool was_in_rfkill)
1423 {
1424         bool hw_rfkill;
1425
1426         /*
1427          * Check again since the RF kill state may have changed while
1428          * all the interrupts were disabled, in this case we couldn't
1429          * receive the RF kill interrupt and update the state in the
1430          * op_mode.
1431          * Don't call the op_mode if the rkfill state hasn't changed.
1432          * This allows the op_mode to call stop_device from the rfkill
1433          * notification without endless recursion. Under very rare
1434          * circumstances, we might have a small recursion if the rfkill
1435          * state changed exactly now while we were called from stop_device.
1436          * This is very unlikely but can happen and is supported.
1437          */
1438         hw_rfkill = iwl_is_rfkill_set(trans);
1439         if (hw_rfkill) {
1440                 set_bit(STATUS_RFKILL_HW, &trans->status);
1441                 set_bit(STATUS_RFKILL_OPMODE, &trans->status);
1442         } else {
1443                 clear_bit(STATUS_RFKILL_HW, &trans->status);
1444                 clear_bit(STATUS_RFKILL_OPMODE, &trans->status);
1445         }
1446         if (hw_rfkill != was_in_rfkill)
1447                 iwl_trans_pcie_rf_kill(trans, hw_rfkill);
1448 }
1449
1450 static void iwl_trans_pcie_stop_device(struct iwl_trans *trans)
1451 {
1452         struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1453         bool was_in_rfkill;
1454
1455         mutex_lock(&trans_pcie->mutex);
1456         trans_pcie->opmode_down = true;
1457         was_in_rfkill = test_bit(STATUS_RFKILL_OPMODE, &trans->status);
1458         _iwl_trans_pcie_stop_device(trans);
1459         iwl_trans_pcie_handle_stop_rfkill(trans, was_in_rfkill);
1460         mutex_unlock(&trans_pcie->mutex);
1461 }
1462
1463 void iwl_trans_pcie_rf_kill(struct iwl_trans *trans, bool state)
1464 {
1465         struct iwl_trans_pcie __maybe_unused *trans_pcie =
1466                 IWL_TRANS_GET_PCIE_TRANS(trans);
1467
1468         lockdep_assert_held(&trans_pcie->mutex);
1469
1470         IWL_WARN(trans, "reporting RF_KILL (radio %s)\n",
1471                  state ? "disabled" : "enabled");
1472         if (iwl_op_mode_hw_rf_kill(trans->op_mode, state)) {
1473                 if (trans->trans_cfg->gen2)
1474                         _iwl_trans_pcie_gen2_stop_device(trans);
1475                 else
1476                         _iwl_trans_pcie_stop_device(trans);
1477         }
1478 }
1479
1480 void iwl_pcie_d3_complete_suspend(struct iwl_trans *trans,
1481                                   bool test, bool reset)
1482 {
1483         iwl_disable_interrupts(trans);
1484
1485         /*
1486          * in testing mode, the host stays awake and the
1487          * hardware won't be reset (not even partially)
1488          */
1489         if (test)
1490                 return;
1491
1492         iwl_pcie_disable_ict(trans);
1493
1494         iwl_pcie_synchronize_irqs(trans);
1495
1496         iwl_clear_bit(trans, CSR_GP_CNTRL,
1497                       BIT(trans->trans_cfg->csr->flag_mac_access_req));
1498         iwl_clear_bit(trans, CSR_GP_CNTRL,
1499                       BIT(trans->trans_cfg->csr->flag_init_done));
1500
1501         if (reset) {
1502                 /*
1503                  * reset TX queues -- some of their registers reset during S3
1504                  * so if we don't reset everything here the D3 image would try
1505                  * to execute some invalid memory upon resume
1506                  */
1507                 iwl_trans_pcie_tx_reset(trans);
1508         }
1509
1510         iwl_pcie_set_pwr(trans, true);
1511 }
1512
1513 static int iwl_trans_pcie_d3_suspend(struct iwl_trans *trans, bool test,
1514                                      bool reset)
1515 {
1516         int ret;
1517         struct iwl_trans_pcie *trans_pcie =  IWL_TRANS_GET_PCIE_TRANS(trans);
1518
1519         /*
1520          * Family IWL_DEVICE_FAMILY_AX210 and above persist mode is set by FW.
1521          */
1522         if (!reset && trans->trans_cfg->device_family < IWL_DEVICE_FAMILY_AX210) {
1523                 /* Enable persistence mode to avoid reset */
1524                 iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG,
1525                             CSR_HW_IF_CONFIG_REG_PERSIST_MODE);
1526         }
1527
1528         if (trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_AX210) {
1529                 iwl_write_umac_prph(trans, UREG_DOORBELL_TO_ISR6,
1530                                     UREG_DOORBELL_TO_ISR6_SUSPEND);
1531
1532                 ret = wait_event_timeout(trans_pcie->sx_waitq,
1533                                          trans_pcie->sx_complete, 2 * HZ);
1534                 /*
1535                  * Invalidate it toward resume.
1536                  */
1537                 trans_pcie->sx_complete = false;
1538
1539                 if (!ret) {
1540                         IWL_ERR(trans, "Timeout entering D3\n");
1541                         return -ETIMEDOUT;
1542                 }
1543         }
1544         iwl_pcie_d3_complete_suspend(trans, test, reset);
1545
1546         return 0;
1547 }
1548
1549 static int iwl_trans_pcie_d3_resume(struct iwl_trans *trans,
1550                                     enum iwl_d3_status *status,
1551                                     bool test,  bool reset)
1552 {
1553         struct iwl_trans_pcie *trans_pcie =  IWL_TRANS_GET_PCIE_TRANS(trans);
1554         u32 val;
1555         int ret;
1556
1557         if (test) {
1558                 iwl_enable_interrupts(trans);
1559                 *status = IWL_D3_STATUS_ALIVE;
1560                 goto out;
1561         }
1562
1563         iwl_set_bit(trans, CSR_GP_CNTRL,
1564                     BIT(trans->trans_cfg->csr->flag_mac_access_req));
1565
1566         ret = iwl_finish_nic_init(trans, trans->trans_cfg);
1567         if (ret)
1568                 return ret;
1569
1570         /*
1571          * Reconfigure IVAR table in case of MSIX or reset ict table in
1572          * MSI mode since HW reset erased it.
1573          * Also enables interrupts - none will happen as
1574          * the device doesn't know we're waking it up, only when
1575          * the opmode actually tells it after this call.
1576          */
1577         iwl_pcie_conf_msix_hw(trans_pcie);
1578         if (!trans_pcie->msix_enabled)
1579                 iwl_pcie_reset_ict(trans);
1580         iwl_enable_interrupts(trans);
1581
1582         iwl_pcie_set_pwr(trans, false);
1583
1584         if (!reset) {
1585                 iwl_clear_bit(trans, CSR_GP_CNTRL,
1586                               BIT(trans->trans_cfg->csr->flag_mac_access_req));
1587         } else {
1588                 iwl_trans_pcie_tx_reset(trans);
1589
1590                 ret = iwl_pcie_rx_init(trans);
1591                 if (ret) {
1592                         IWL_ERR(trans,
1593                                 "Failed to resume the device (RX reset)\n");
1594                         return ret;
1595                 }
1596         }
1597
1598         IWL_DEBUG_POWER(trans, "WFPM value upon resume = 0x%08X\n",
1599                         iwl_read_umac_prph(trans, WFPM_GP2));
1600
1601         val = iwl_read32(trans, CSR_RESET);
1602         if (val & CSR_RESET_REG_FLAG_NEVO_RESET)
1603                 *status = IWL_D3_STATUS_RESET;
1604         else
1605                 *status = IWL_D3_STATUS_ALIVE;
1606
1607 out:
1608         if (*status == IWL_D3_STATUS_ALIVE &&
1609             trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_AX210) {
1610                 trans_pcie->sx_complete = false;
1611                 iwl_write_umac_prph(trans, UREG_DOORBELL_TO_ISR6,
1612                                     UREG_DOORBELL_TO_ISR6_RESUME);
1613
1614                 ret = wait_event_timeout(trans_pcie->sx_waitq,
1615                                          trans_pcie->sx_complete, 2 * HZ);
1616                 /*
1617                  * Invalidate it toward next suspend.
1618                  */
1619                 trans_pcie->sx_complete = false;
1620
1621                 if (!ret) {
1622                         IWL_ERR(trans, "Timeout exiting D3\n");
1623                         return -ETIMEDOUT;
1624                 }
1625         }
1626         return 0;
1627 }
1628
1629 static void
1630 iwl_pcie_set_interrupt_capa(struct pci_dev *pdev,
1631                             struct iwl_trans *trans,
1632                             const struct iwl_cfg_trans_params *cfg_trans)
1633 {
1634         struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1635         int max_irqs, num_irqs, i, ret;
1636         u16 pci_cmd;
1637
1638         if (!cfg_trans->mq_rx_supported)
1639                 goto enable_msi;
1640
1641         max_irqs = min_t(u32, num_online_cpus() + 2, IWL_MAX_RX_HW_QUEUES);
1642         for (i = 0; i < max_irqs; i++)
1643                 trans_pcie->msix_entries[i].entry = i;
1644
1645         num_irqs = pci_enable_msix_range(pdev, trans_pcie->msix_entries,
1646                                          MSIX_MIN_INTERRUPT_VECTORS,
1647                                          max_irqs);
1648         if (num_irqs < 0) {
1649                 IWL_DEBUG_INFO(trans,
1650                                "Failed to enable msi-x mode (ret %d). Moving to msi mode.\n",
1651                                num_irqs);
1652                 goto enable_msi;
1653         }
1654         trans_pcie->def_irq = (num_irqs == max_irqs) ? num_irqs - 1 : 0;
1655
1656         IWL_DEBUG_INFO(trans,
1657                        "MSI-X enabled. %d interrupt vectors were allocated\n",
1658                        num_irqs);
1659
1660         /*
1661          * In case the OS provides fewer interrupts than requested, different
1662          * causes will share the same interrupt vector as follows:
1663          * One interrupt less: non rx causes shared with FBQ.
1664          * Two interrupts less: non rx causes shared with FBQ and RSS.
1665          * More than two interrupts: we will use fewer RSS queues.
1666          */
1667         if (num_irqs <= max_irqs - 2) {
1668                 trans_pcie->trans->num_rx_queues = num_irqs + 1;
1669                 trans_pcie->shared_vec_mask = IWL_SHARED_IRQ_NON_RX |
1670                         IWL_SHARED_IRQ_FIRST_RSS;
1671         } else if (num_irqs == max_irqs - 1) {
1672                 trans_pcie->trans->num_rx_queues = num_irqs;
1673                 trans_pcie->shared_vec_mask = IWL_SHARED_IRQ_NON_RX;
1674         } else {
1675                 trans_pcie->trans->num_rx_queues = num_irqs - 1;
1676         }
1677         WARN_ON(trans_pcie->trans->num_rx_queues > IWL_MAX_RX_HW_QUEUES);
1678
1679         trans_pcie->alloc_vecs = num_irqs;
1680         trans_pcie->msix_enabled = true;
1681         return;
1682
1683 enable_msi:
1684         ret = pci_enable_msi(pdev);
1685         if (ret) {
1686                 dev_err(&pdev->dev, "pci_enable_msi failed - %d\n", ret);
1687                 /* enable rfkill interrupt: hw bug w/a */
1688                 pci_read_config_word(pdev, PCI_COMMAND, &pci_cmd);
1689                 if (pci_cmd & PCI_COMMAND_INTX_DISABLE) {
1690                         pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
1691                         pci_write_config_word(pdev, PCI_COMMAND, pci_cmd);
1692                 }
1693         }
1694 }
1695
1696 static void iwl_pcie_irq_set_affinity(struct iwl_trans *trans)
1697 {
1698         int iter_rx_q, i, ret, cpu, offset;
1699         struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1700
1701         i = trans_pcie->shared_vec_mask & IWL_SHARED_IRQ_FIRST_RSS ? 0 : 1;
1702         iter_rx_q = trans_pcie->trans->num_rx_queues - 1 + i;
1703         offset = 1 + i;
1704         for (; i < iter_rx_q ; i++) {
1705                 /*
1706                  * Get the cpu prior to the place to search
1707                  * (i.e. return will be > i - 1).
1708                  */
1709                 cpu = cpumask_next(i - offset, cpu_online_mask);
1710                 cpumask_set_cpu(cpu, &trans_pcie->affinity_mask[i]);
1711                 ret = irq_set_affinity_hint(trans_pcie->msix_entries[i].vector,
1712                                             &trans_pcie->affinity_mask[i]);
1713                 if (ret)
1714                         IWL_ERR(trans_pcie->trans,
1715                                 "Failed to set affinity mask for IRQ %d\n",
1716                                 i);
1717         }
1718 }
1719
1720 static int iwl_pcie_init_msix_handler(struct pci_dev *pdev,
1721                                       struct iwl_trans_pcie *trans_pcie)
1722 {
1723         int i;
1724
1725         for (i = 0; i < trans_pcie->alloc_vecs; i++) {
1726                 int ret;
1727                 struct msix_entry *msix_entry;
1728                 const char *qname = queue_name(&pdev->dev, trans_pcie, i);
1729
1730                 if (!qname)
1731                         return -ENOMEM;
1732
1733                 msix_entry = &trans_pcie->msix_entries[i];
1734                 ret = devm_request_threaded_irq(&pdev->dev,
1735                                                 msix_entry->vector,
1736                                                 iwl_pcie_msix_isr,
1737                                                 (i == trans_pcie->def_irq) ?
1738                                                 iwl_pcie_irq_msix_handler :
1739                                                 iwl_pcie_irq_rx_msix_handler,
1740                                                 IRQF_SHARED,
1741                                                 qname,
1742                                                 msix_entry);
1743                 if (ret) {
1744                         IWL_ERR(trans_pcie->trans,
1745                                 "Error allocating IRQ %d\n", i);
1746
1747                         return ret;
1748                 }
1749         }
1750         iwl_pcie_irq_set_affinity(trans_pcie->trans);
1751
1752         return 0;
1753 }
1754
1755 static int iwl_trans_pcie_clear_persistence_bit(struct iwl_trans *trans)
1756 {
1757         u32 hpm, wprot;
1758
1759         switch (trans->trans_cfg->device_family) {
1760         case IWL_DEVICE_FAMILY_9000:
1761                 wprot = PREG_PRPH_WPROT_9000;
1762                 break;
1763         case IWL_DEVICE_FAMILY_22000:
1764                 wprot = PREG_PRPH_WPROT_22000;
1765                 break;
1766         default:
1767                 return 0;
1768         }
1769
1770         hpm = iwl_read_umac_prph_no_grab(trans, HPM_DEBUG);
1771         if (hpm != 0xa5a5a5a0 && (hpm & PERSISTENCE_BIT)) {
1772                 u32 wprot_val = iwl_read_umac_prph_no_grab(trans, wprot);
1773
1774                 if (wprot_val & PREG_WFPM_ACCESS) {
1775                         IWL_ERR(trans,
1776                                 "Error, can not clear persistence bit\n");
1777                         return -EPERM;
1778                 }
1779                 iwl_write_umac_prph_no_grab(trans, HPM_DEBUG,
1780                                             hpm & ~PERSISTENCE_BIT);
1781         }
1782
1783         return 0;
1784 }
1785
1786 static int _iwl_trans_pcie_start_hw(struct iwl_trans *trans)
1787 {
1788         struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1789         int err;
1790
1791         lockdep_assert_held(&trans_pcie->mutex);
1792
1793         err = iwl_pcie_prepare_card_hw(trans);
1794         if (err) {
1795                 IWL_ERR(trans, "Error while preparing HW: %d\n", err);
1796                 return err;
1797         }
1798
1799         err = iwl_trans_pcie_clear_persistence_bit(trans);
1800         if (err)
1801                 return err;
1802
1803         iwl_trans_pcie_sw_reset(trans);
1804
1805         err = iwl_pcie_apm_init(trans);
1806         if (err)
1807                 return err;
1808
1809         iwl_pcie_init_msix(trans_pcie);
1810
1811         /* From now on, the op_mode will be kept updated about RF kill state */
1812         iwl_enable_rfkill_int(trans);
1813
1814         trans_pcie->opmode_down = false;
1815
1816         /* Set is_down to false here so that...*/
1817         trans_pcie->is_down = false;
1818
1819         /* ...rfkill can call stop_device and set it false if needed */
1820         iwl_pcie_check_hw_rf_kill(trans);
1821
1822         return 0;
1823 }
1824
1825 static int iwl_trans_pcie_start_hw(struct iwl_trans *trans)
1826 {
1827         struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1828         int ret;
1829
1830         mutex_lock(&trans_pcie->mutex);
1831         ret = _iwl_trans_pcie_start_hw(trans);
1832         mutex_unlock(&trans_pcie->mutex);
1833
1834         return ret;
1835 }
1836
1837 static void iwl_trans_pcie_op_mode_leave(struct iwl_trans *trans)
1838 {
1839         struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1840
1841         mutex_lock(&trans_pcie->mutex);
1842
1843         /* disable interrupts - don't enable HW RF kill interrupt */
1844         iwl_disable_interrupts(trans);
1845
1846         iwl_pcie_apm_stop(trans, true);
1847
1848         iwl_disable_interrupts(trans);
1849
1850         iwl_pcie_disable_ict(trans);
1851
1852         mutex_unlock(&trans_pcie->mutex);
1853
1854         iwl_pcie_synchronize_irqs(trans);
1855 }
1856
1857 static void iwl_trans_pcie_write8(struct iwl_trans *trans, u32 ofs, u8 val)
1858 {
1859         writeb(val, IWL_TRANS_GET_PCIE_TRANS(trans)->hw_base + ofs);
1860 }
1861
1862 static void iwl_trans_pcie_write32(struct iwl_trans *trans, u32 ofs, u32 val)
1863 {
1864         writel(val, IWL_TRANS_GET_PCIE_TRANS(trans)->hw_base + ofs);
1865 }
1866
1867 static u32 iwl_trans_pcie_read32(struct iwl_trans *trans, u32 ofs)
1868 {
1869         return readl(IWL_TRANS_GET_PCIE_TRANS(trans)->hw_base + ofs);
1870 }
1871
1872 static u32 iwl_trans_pcie_prph_msk(struct iwl_trans *trans)
1873 {
1874         if (trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_AX210)
1875                 return 0x00FFFFFF;
1876         else
1877                 return 0x000FFFFF;
1878 }
1879
1880 static u32 iwl_trans_pcie_read_prph(struct iwl_trans *trans, u32 reg)
1881 {
1882         u32 mask = iwl_trans_pcie_prph_msk(trans);
1883
1884         iwl_trans_pcie_write32(trans, HBUS_TARG_PRPH_RADDR,
1885                                ((reg & mask) | (3 << 24)));
1886         return iwl_trans_pcie_read32(trans, HBUS_TARG_PRPH_RDAT);
1887 }
1888
1889 static void iwl_trans_pcie_write_prph(struct iwl_trans *trans, u32 addr,
1890                                       u32 val)
1891 {
1892         u32 mask = iwl_trans_pcie_prph_msk(trans);
1893
1894         iwl_trans_pcie_write32(trans, HBUS_TARG_PRPH_WADDR,
1895                                ((addr & mask) | (3 << 24)));
1896         iwl_trans_pcie_write32(trans, HBUS_TARG_PRPH_WDAT, val);
1897 }
1898
1899 static void iwl_trans_pcie_configure(struct iwl_trans *trans,
1900                                      const struct iwl_trans_config *trans_cfg)
1901 {
1902         struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1903
1904         trans_pcie->cmd_queue = trans_cfg->cmd_queue;
1905         trans_pcie->cmd_fifo = trans_cfg->cmd_fifo;
1906         trans_pcie->cmd_q_wdg_timeout = trans_cfg->cmd_q_wdg_timeout;
1907         if (WARN_ON(trans_cfg->n_no_reclaim_cmds > MAX_NO_RECLAIM_CMDS))
1908                 trans_pcie->n_no_reclaim_cmds = 0;
1909         else
1910                 trans_pcie->n_no_reclaim_cmds = trans_cfg->n_no_reclaim_cmds;
1911         if (trans_pcie->n_no_reclaim_cmds)
1912                 memcpy(trans_pcie->no_reclaim_cmds, trans_cfg->no_reclaim_cmds,
1913                        trans_pcie->n_no_reclaim_cmds * sizeof(u8));
1914
1915         trans_pcie->rx_buf_size = trans_cfg->rx_buf_size;
1916         trans_pcie->rx_page_order =
1917                 iwl_trans_get_rb_size_order(trans_pcie->rx_buf_size);
1918
1919         trans_pcie->bc_table_dword = trans_cfg->bc_table_dword;
1920         trans_pcie->scd_set_active = trans_cfg->scd_set_active;
1921         trans_pcie->sw_csum_tx = trans_cfg->sw_csum_tx;
1922
1923         trans_pcie->page_offs = trans_cfg->cb_data_offs;
1924         trans_pcie->dev_cmd_offs = trans_cfg->cb_data_offs + sizeof(void *);
1925
1926         trans->command_groups = trans_cfg->command_groups;
1927         trans->command_groups_size = trans_cfg->command_groups_size;
1928
1929         /* Initialize NAPI here - it should be before registering to mac80211
1930          * in the opmode but after the HW struct is allocated.
1931          * As this function may be called again in some corner cases don't
1932          * do anything if NAPI was already initialized.
1933          */
1934         if (trans_pcie->napi_dev.reg_state != NETREG_DUMMY)
1935                 init_dummy_netdev(&trans_pcie->napi_dev);
1936 }
1937
1938 void iwl_trans_pcie_free(struct iwl_trans *trans)
1939 {
1940         struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1941         int i;
1942
1943         iwl_pcie_synchronize_irqs(trans);
1944
1945         if (trans->trans_cfg->gen2)
1946                 iwl_pcie_gen2_tx_free(trans);
1947         else
1948                 iwl_pcie_tx_free(trans);
1949         iwl_pcie_rx_free(trans);
1950
1951         if (trans_pcie->rba.alloc_wq) {
1952                 destroy_workqueue(trans_pcie->rba.alloc_wq);
1953                 trans_pcie->rba.alloc_wq = NULL;
1954         }
1955
1956         if (trans_pcie->msix_enabled) {
1957                 for (i = 0; i < trans_pcie->alloc_vecs; i++) {
1958                         irq_set_affinity_hint(
1959                                 trans_pcie->msix_entries[i].vector,
1960                                 NULL);
1961                 }
1962
1963                 trans_pcie->msix_enabled = false;
1964         } else {
1965                 iwl_pcie_free_ict(trans);
1966         }
1967
1968         iwl_pcie_free_fw_monitor(trans);
1969
1970         for_each_possible_cpu(i) {
1971                 struct iwl_tso_hdr_page *p =
1972                         per_cpu_ptr(trans_pcie->tso_hdr_page, i);
1973
1974                 if (p->page)
1975                         __free_page(p->page);
1976         }
1977
1978         free_percpu(trans_pcie->tso_hdr_page);
1979         mutex_destroy(&trans_pcie->mutex);
1980         iwl_trans_free(trans);
1981 }
1982
1983 static void iwl_trans_pcie_set_pmi(struct iwl_trans *trans, bool state)
1984 {
1985         if (state)
1986                 set_bit(STATUS_TPOWER_PMI, &trans->status);
1987         else
1988                 clear_bit(STATUS_TPOWER_PMI, &trans->status);
1989 }
1990
1991 struct iwl_trans_pcie_removal {
1992         struct pci_dev *pdev;
1993         struct work_struct work;
1994 };
1995
1996 static void iwl_trans_pcie_removal_wk(struct work_struct *wk)
1997 {
1998         struct iwl_trans_pcie_removal *removal =
1999                 container_of(wk, struct iwl_trans_pcie_removal, work);
2000         struct pci_dev *pdev = removal->pdev;
2001         static char *prop[] = {"EVENT=INACCESSIBLE", NULL};
2002
2003         dev_err(&pdev->dev, "Device gone - attempting removal\n");
2004         kobject_uevent_env(&pdev->dev.kobj, KOBJ_CHANGE, prop);
2005         pci_lock_rescan_remove();
2006         pci_dev_put(pdev);
2007         pci_stop_and_remove_bus_device(pdev);
2008         pci_unlock_rescan_remove();
2009
2010         kfree(removal);
2011         module_put(THIS_MODULE);
2012 }
2013
2014 static bool iwl_trans_pcie_grab_nic_access(struct iwl_trans *trans,
2015                                            unsigned long *flags)
2016 {
2017         int ret;
2018         struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2019
2020         spin_lock_irqsave(&trans_pcie->reg_lock, *flags);
2021
2022         if (trans_pcie->cmd_hold_nic_awake)
2023                 goto out;
2024
2025         /* this bit wakes up the NIC */
2026         __iwl_trans_pcie_set_bit(trans, CSR_GP_CNTRL,
2027                                  BIT(trans->trans_cfg->csr->flag_mac_access_req));
2028         if (trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_8000)
2029                 udelay(2);
2030
2031         /*
2032          * These bits say the device is running, and should keep running for
2033          * at least a short while (at least as long as MAC_ACCESS_REQ stays 1),
2034          * but they do not indicate that embedded SRAM is restored yet;
2035          * HW with volatile SRAM must save/restore contents to/from
2036          * host DRAM when sleeping/waking for power-saving.
2037          * Each direction takes approximately 1/4 millisecond; with this
2038          * overhead, it's a good idea to grab and hold MAC_ACCESS_REQUEST if a
2039          * series of register accesses are expected (e.g. reading Event Log),
2040          * to keep device from sleeping.
2041          *
2042          * CSR_UCODE_DRV_GP1 register bit MAC_SLEEP == 0 indicates that
2043          * SRAM is okay/restored.  We don't check that here because this call
2044          * is just for hardware register access; but GP1 MAC_SLEEP
2045          * check is a good idea before accessing the SRAM of HW with
2046          * volatile SRAM (e.g. reading Event Log).
2047          *
2048          * 5000 series and later (including 1000 series) have non-volatile SRAM,
2049          * and do not save/restore SRAM when power cycling.
2050          */
2051         ret = iwl_poll_bit(trans, CSR_GP_CNTRL,
2052                            BIT(trans->trans_cfg->csr->flag_val_mac_access_en),
2053                            (BIT(trans->trans_cfg->csr->flag_mac_clock_ready) |
2054                             CSR_GP_CNTRL_REG_FLAG_GOING_TO_SLEEP), 15000);
2055         if (unlikely(ret < 0)) {
2056                 u32 cntrl = iwl_read32(trans, CSR_GP_CNTRL);
2057
2058                 WARN_ONCE(1,
2059                           "Timeout waiting for hardware access (CSR_GP_CNTRL 0x%08x)\n",
2060                           cntrl);
2061
2062                 iwl_trans_pcie_dump_regs(trans);
2063
2064                 if (iwlwifi_mod_params.remove_when_gone && cntrl == ~0U) {
2065                         struct iwl_trans_pcie_removal *removal;
2066
2067                         if (test_bit(STATUS_TRANS_DEAD, &trans->status))
2068                                 goto err;
2069
2070                         IWL_ERR(trans, "Device gone - scheduling removal!\n");
2071
2072                         /*
2073                          * get a module reference to avoid doing this
2074                          * while unloading anyway and to avoid
2075                          * scheduling a work with code that's being
2076                          * removed.
2077                          */
2078                         if (!try_module_get(THIS_MODULE)) {
2079                                 IWL_ERR(trans,
2080                                         "Module is being unloaded - abort\n");
2081                                 goto err;
2082                         }
2083
2084                         removal = kzalloc(sizeof(*removal), GFP_ATOMIC);
2085                         if (!removal) {
2086                                 module_put(THIS_MODULE);
2087                                 goto err;
2088                         }
2089                         /*
2090                          * we don't need to clear this flag, because
2091                          * the trans will be freed and reallocated.
2092                         */
2093                         set_bit(STATUS_TRANS_DEAD, &trans->status);
2094
2095                         removal->pdev = to_pci_dev(trans->dev);
2096                         INIT_WORK(&removal->work, iwl_trans_pcie_removal_wk);
2097                         pci_dev_get(removal->pdev);
2098                         schedule_work(&removal->work);
2099                 } else {
2100                         iwl_write32(trans, CSR_RESET,
2101                                     CSR_RESET_REG_FLAG_FORCE_NMI);
2102                 }
2103
2104 err:
2105                 spin_unlock_irqrestore(&trans_pcie->reg_lock, *flags);
2106                 return false;
2107         }
2108
2109 out:
2110         /*
2111          * Fool sparse by faking we release the lock - sparse will
2112          * track nic_access anyway.
2113          */
2114         __release(&trans_pcie->reg_lock);
2115         return true;
2116 }
2117
2118 static void iwl_trans_pcie_release_nic_access(struct iwl_trans *trans,
2119                                               unsigned long *flags)
2120 {
2121         struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2122
2123         lockdep_assert_held(&trans_pcie->reg_lock);
2124
2125         /*
2126          * Fool sparse by faking we acquiring the lock - sparse will
2127          * track nic_access anyway.
2128          */
2129         __acquire(&trans_pcie->reg_lock);
2130
2131         if (trans_pcie->cmd_hold_nic_awake)
2132                 goto out;
2133
2134         __iwl_trans_pcie_clear_bit(trans, CSR_GP_CNTRL,
2135                                    BIT(trans->trans_cfg->csr->flag_mac_access_req));
2136         /*
2137          * Above we read the CSR_GP_CNTRL register, which will flush
2138          * any previous writes, but we need the write that clears the
2139          * MAC_ACCESS_REQ bit to be performed before any other writes
2140          * scheduled on different CPUs (after we drop reg_lock).
2141          */
2142 out:
2143         spin_unlock_irqrestore(&trans_pcie->reg_lock, *flags);
2144 }
2145
2146 static int iwl_trans_pcie_read_mem(struct iwl_trans *trans, u32 addr,
2147                                    void *buf, int dwords)
2148 {
2149         unsigned long flags;
2150         int offs, ret = 0;
2151         u32 *vals = buf;
2152
2153         if (iwl_trans_grab_nic_access(trans, &flags)) {
2154                 iwl_write32(trans, HBUS_TARG_MEM_RADDR, addr);
2155                 for (offs = 0; offs < dwords; offs++)
2156                         vals[offs] = iwl_read32(trans, HBUS_TARG_MEM_RDAT);
2157                 iwl_trans_release_nic_access(trans, &flags);
2158         } else {
2159                 ret = -EBUSY;
2160         }
2161         return ret;
2162 }
2163
2164 static int iwl_trans_pcie_write_mem(struct iwl_trans *trans, u32 addr,
2165                                     const void *buf, int dwords)
2166 {
2167         unsigned long flags;
2168         int offs, ret = 0;
2169         const u32 *vals = buf;
2170
2171         if (iwl_trans_grab_nic_access(trans, &flags)) {
2172                 iwl_write32(trans, HBUS_TARG_MEM_WADDR, addr);
2173                 for (offs = 0; offs < dwords; offs++)
2174                         iwl_write32(trans, HBUS_TARG_MEM_WDAT,
2175                                     vals ? vals[offs] : 0);
2176                 iwl_trans_release_nic_access(trans, &flags);
2177         } else {
2178                 ret = -EBUSY;
2179         }
2180         return ret;
2181 }
2182
2183 static void iwl_trans_pcie_freeze_txq_timer(struct iwl_trans *trans,
2184                                             unsigned long txqs,
2185                                             bool freeze)
2186 {
2187         struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2188         int queue;
2189
2190         for_each_set_bit(queue, &txqs, BITS_PER_LONG) {
2191                 struct iwl_txq *txq = trans_pcie->txq[queue];
2192                 unsigned long now;
2193
2194                 spin_lock_bh(&txq->lock);
2195
2196                 now = jiffies;
2197
2198                 if (txq->frozen == freeze)
2199                         goto next_queue;
2200
2201                 IWL_DEBUG_TX_QUEUES(trans, "%s TXQ %d\n",
2202                                     freeze ? "Freezing" : "Waking", queue);
2203
2204                 txq->frozen = freeze;
2205
2206                 if (txq->read_ptr == txq->write_ptr)
2207                         goto next_queue;
2208
2209                 if (freeze) {
2210                         if (unlikely(time_after(now,
2211                                                 txq->stuck_timer.expires))) {
2212                                 /*
2213                                  * The timer should have fired, maybe it is
2214                                  * spinning right now on the lock.
2215                                  */
2216                                 goto next_queue;
2217                         }
2218                         /* remember how long until the timer fires */
2219                         txq->frozen_expiry_remainder =
2220                                 txq->stuck_timer.expires - now;
2221                         del_timer(&txq->stuck_timer);
2222                         goto next_queue;
2223                 }
2224
2225                 /*
2226                  * Wake a non-empty queue -> arm timer with the
2227                  * remainder before it froze
2228                  */
2229                 mod_timer(&txq->stuck_timer,
2230                           now + txq->frozen_expiry_remainder);
2231
2232 next_queue:
2233                 spin_unlock_bh(&txq->lock);
2234         }
2235 }
2236
2237 static void iwl_trans_pcie_block_txq_ptrs(struct iwl_trans *trans, bool block)
2238 {
2239         struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2240         int i;
2241
2242         for (i = 0; i < trans->trans_cfg->base_params->num_of_queues; i++) {
2243                 struct iwl_txq *txq = trans_pcie->txq[i];
2244
2245                 if (i == trans_pcie->cmd_queue)
2246                         continue;
2247
2248                 spin_lock_bh(&txq->lock);
2249
2250                 if (!block && !(WARN_ON_ONCE(!txq->block))) {
2251                         txq->block--;
2252                         if (!txq->block) {
2253                                 iwl_write32(trans, HBUS_TARG_WRPTR,
2254                                             txq->write_ptr | (i << 8));
2255                         }
2256                 } else if (block) {
2257                         txq->block++;
2258                 }
2259
2260                 spin_unlock_bh(&txq->lock);
2261         }
2262 }
2263
2264 #define IWL_FLUSH_WAIT_MS       2000
2265
2266 void iwl_trans_pcie_log_scd_error(struct iwl_trans *trans, struct iwl_txq *txq)
2267 {
2268         u32 txq_id = txq->id;
2269         u32 status;
2270         bool active;
2271         u8 fifo;
2272
2273         if (trans->trans_cfg->use_tfh) {
2274                 IWL_ERR(trans, "Queue %d is stuck %d %d\n", txq_id,
2275                         txq->read_ptr, txq->write_ptr);
2276                 /* TODO: access new SCD registers and dump them */
2277                 return;
2278         }
2279
2280         status = iwl_read_prph(trans, SCD_QUEUE_STATUS_BITS(txq_id));
2281         fifo = (status >> SCD_QUEUE_STTS_REG_POS_TXF) & 0x7;
2282         active = !!(status & BIT(SCD_QUEUE_STTS_REG_POS_ACTIVE));
2283
2284         IWL_ERR(trans,
2285                 "Queue %d is %sactive on fifo %d and stuck for %u ms. SW [%d, %d] HW [%d, %d] FH TRB=0x0%x\n",
2286                 txq_id, active ? "" : "in", fifo,
2287                 jiffies_to_msecs(txq->wd_timeout),
2288                 txq->read_ptr, txq->write_ptr,
2289                 iwl_read_prph(trans, SCD_QUEUE_RDPTR(txq_id)) &
2290                         (trans->trans_cfg->base_params->max_tfd_queue_size - 1),
2291                         iwl_read_prph(trans, SCD_QUEUE_WRPTR(txq_id)) &
2292                         (trans->trans_cfg->base_params->max_tfd_queue_size - 1),
2293                         iwl_read_direct32(trans, FH_TX_TRB_REG(fifo)));
2294 }
2295
2296 static int iwl_trans_pcie_rxq_dma_data(struct iwl_trans *trans, int queue,
2297                                        struct iwl_trans_rxq_dma_data *data)
2298 {
2299         struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2300
2301         if (queue >= trans->num_rx_queues || !trans_pcie->rxq)
2302                 return -EINVAL;
2303
2304         data->fr_bd_cb = trans_pcie->rxq[queue].bd_dma;
2305         data->urbd_stts_wrptr = trans_pcie->rxq[queue].rb_stts_dma;
2306         data->ur_bd_cb = trans_pcie->rxq[queue].used_bd_dma;
2307         data->fr_bd_wid = 0;
2308
2309         return 0;
2310 }
2311
2312 static int iwl_trans_pcie_wait_txq_empty(struct iwl_trans *trans, int txq_idx)
2313 {
2314         struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2315         struct iwl_txq *txq;
2316         unsigned long now = jiffies;
2317         bool overflow_tx;
2318         u8 wr_ptr;
2319
2320         /* Make sure the NIC is still alive in the bus */
2321         if (test_bit(STATUS_TRANS_DEAD, &trans->status))
2322                 return -ENODEV;
2323
2324         if (!test_bit(txq_idx, trans_pcie->queue_used))
2325                 return -EINVAL;
2326
2327         IWL_DEBUG_TX_QUEUES(trans, "Emptying queue %d...\n", txq_idx);
2328         txq = trans_pcie->txq[txq_idx];
2329
2330         spin_lock_bh(&txq->lock);
2331         overflow_tx = txq->overflow_tx ||
2332                       !skb_queue_empty(&txq->overflow_q);
2333         spin_unlock_bh(&txq->lock);
2334
2335         wr_ptr = READ_ONCE(txq->write_ptr);
2336
2337         while ((txq->read_ptr != READ_ONCE(txq->write_ptr) ||
2338                 overflow_tx) &&
2339                !time_after(jiffies,
2340                            now + msecs_to_jiffies(IWL_FLUSH_WAIT_MS))) {
2341                 u8 write_ptr = READ_ONCE(txq->write_ptr);
2342
2343                 /*
2344                  * If write pointer moved during the wait, warn only
2345                  * if the TX came from op mode. In case TX came from
2346                  * trans layer (overflow TX) don't warn.
2347                  */
2348                 if (WARN_ONCE(wr_ptr != write_ptr && !overflow_tx,
2349                               "WR pointer moved while flushing %d -> %d\n",
2350                               wr_ptr, write_ptr))
2351                         return -ETIMEDOUT;
2352                 wr_ptr = write_ptr;
2353
2354                 usleep_range(1000, 2000);
2355
2356                 spin_lock_bh(&txq->lock);
2357                 overflow_tx = txq->overflow_tx ||
2358                               !skb_queue_empty(&txq->overflow_q);
2359                 spin_unlock_bh(&txq->lock);
2360         }
2361
2362         if (txq->read_ptr != txq->write_ptr) {
2363                 IWL_ERR(trans,
2364                         "fail to flush all tx fifo queues Q %d\n", txq_idx);
2365                 iwl_trans_pcie_log_scd_error(trans, txq);
2366                 return -ETIMEDOUT;
2367         }
2368
2369         IWL_DEBUG_TX_QUEUES(trans, "Queue %d is now empty.\n", txq_idx);
2370
2371         return 0;
2372 }
2373
2374 static int iwl_trans_pcie_wait_txqs_empty(struct iwl_trans *trans, u32 txq_bm)
2375 {
2376         struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2377         int cnt;
2378         int ret = 0;
2379
2380         /* waiting for all the tx frames complete might take a while */
2381         for (cnt = 0;
2382              cnt < trans->trans_cfg->base_params->num_of_queues;
2383              cnt++) {
2384
2385                 if (cnt == trans_pcie->cmd_queue)
2386                         continue;
2387                 if (!test_bit(cnt, trans_pcie->queue_used))
2388                         continue;
2389                 if (!(BIT(cnt) & txq_bm))
2390                         continue;
2391
2392                 ret = iwl_trans_pcie_wait_txq_empty(trans, cnt);
2393                 if (ret)
2394                         break;
2395         }
2396
2397         return ret;
2398 }
2399
2400 static void iwl_trans_pcie_set_bits_mask(struct iwl_trans *trans, u32 reg,
2401                                          u32 mask, u32 value)
2402 {
2403         struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2404         unsigned long flags;
2405
2406         spin_lock_irqsave(&trans_pcie->reg_lock, flags);
2407         __iwl_trans_pcie_set_bits_mask(trans, reg, mask, value);
2408         spin_unlock_irqrestore(&trans_pcie->reg_lock, flags);
2409 }
2410
2411 static const char *get_csr_string(int cmd)
2412 {
2413 #define IWL_CMD(x) case x: return #x
2414         switch (cmd) {
2415         IWL_CMD(CSR_HW_IF_CONFIG_REG);
2416         IWL_CMD(CSR_INT_COALESCING);
2417         IWL_CMD(CSR_INT);
2418         IWL_CMD(CSR_INT_MASK);
2419         IWL_CMD(CSR_FH_INT_STATUS);
2420         IWL_CMD(CSR_GPIO_IN);
2421         IWL_CMD(CSR_RESET);
2422         IWL_CMD(CSR_GP_CNTRL);
2423         IWL_CMD(CSR_HW_REV);
2424         IWL_CMD(CSR_EEPROM_REG);
2425         IWL_CMD(CSR_EEPROM_GP);
2426         IWL_CMD(CSR_OTP_GP_REG);
2427         IWL_CMD(CSR_GIO_REG);
2428         IWL_CMD(CSR_GP_UCODE_REG);
2429         IWL_CMD(CSR_GP_DRIVER_REG);
2430         IWL_CMD(CSR_UCODE_DRV_GP1);
2431         IWL_CMD(CSR_UCODE_DRV_GP2);
2432         IWL_CMD(CSR_LED_REG);
2433         IWL_CMD(CSR_DRAM_INT_TBL_REG);
2434         IWL_CMD(CSR_GIO_CHICKEN_BITS);
2435         IWL_CMD(CSR_ANA_PLL_CFG);
2436         IWL_CMD(CSR_HW_REV_WA_REG);
2437         IWL_CMD(CSR_MONITOR_STATUS_REG);
2438         IWL_CMD(CSR_DBG_HPET_MEM_REG);
2439         default:
2440                 return "UNKNOWN";
2441         }
2442 #undef IWL_CMD
2443 }
2444
2445 void iwl_pcie_dump_csr(struct iwl_trans *trans)
2446 {
2447         int i;
2448         static const u32 csr_tbl[] = {
2449                 CSR_HW_IF_CONFIG_REG,
2450                 CSR_INT_COALESCING,
2451                 CSR_INT,
2452                 CSR_INT_MASK,
2453                 CSR_FH_INT_STATUS,
2454                 CSR_GPIO_IN,
2455                 CSR_RESET,
2456                 CSR_GP_CNTRL,
2457                 CSR_HW_REV,
2458                 CSR_EEPROM_REG,
2459                 CSR_EEPROM_GP,
2460                 CSR_OTP_GP_REG,
2461                 CSR_GIO_REG,
2462                 CSR_GP_UCODE_REG,
2463                 CSR_GP_DRIVER_REG,
2464                 CSR_UCODE_DRV_GP1,
2465                 CSR_UCODE_DRV_GP2,
2466                 CSR_LED_REG,
2467                 CSR_DRAM_INT_TBL_REG,
2468                 CSR_GIO_CHICKEN_BITS,
2469                 CSR_ANA_PLL_CFG,
2470                 CSR_MONITOR_STATUS_REG,
2471                 CSR_HW_REV_WA_REG,
2472                 CSR_DBG_HPET_MEM_REG
2473         };
2474         IWL_ERR(trans, "CSR values:\n");
2475         IWL_ERR(trans, "(2nd byte of CSR_INT_COALESCING is "
2476                 "CSR_INT_PERIODIC_REG)\n");
2477         for (i = 0; i <  ARRAY_SIZE(csr_tbl); i++) {
2478                 IWL_ERR(trans, "  %25s: 0X%08x\n",
2479                         get_csr_string(csr_tbl[i]),
2480                         iwl_read32(trans, csr_tbl[i]));
2481         }
2482 }
2483
2484 #ifdef CONFIG_IWLWIFI_DEBUGFS
2485 /* create and remove of files */
2486 #define DEBUGFS_ADD_FILE(name, parent, mode) do {                       \
2487         debugfs_create_file(#name, mode, parent, trans,                 \
2488                             &iwl_dbgfs_##name##_ops);                   \
2489 } while (0)
2490
2491 /* file operation */
2492 #define DEBUGFS_READ_FILE_OPS(name)                                     \
2493 static const struct file_operations iwl_dbgfs_##name##_ops = {          \
2494         .read = iwl_dbgfs_##name##_read,                                \
2495         .open = simple_open,                                            \
2496         .llseek = generic_file_llseek,                                  \
2497 };
2498
2499 #define DEBUGFS_WRITE_FILE_OPS(name)                                    \
2500 static const struct file_operations iwl_dbgfs_##name##_ops = {          \
2501         .write = iwl_dbgfs_##name##_write,                              \
2502         .open = simple_open,                                            \
2503         .llseek = generic_file_llseek,                                  \
2504 };
2505
2506 #define DEBUGFS_READ_WRITE_FILE_OPS(name)                               \
2507 static const struct file_operations iwl_dbgfs_##name##_ops = {          \
2508         .write = iwl_dbgfs_##name##_write,                              \
2509         .read = iwl_dbgfs_##name##_read,                                \
2510         .open = simple_open,                                            \
2511         .llseek = generic_file_llseek,                                  \
2512 };
2513
2514 static ssize_t iwl_dbgfs_tx_queue_read(struct file *file,
2515                                        char __user *user_buf,
2516                                        size_t count, loff_t *ppos)
2517 {
2518         struct iwl_trans *trans = file->private_data;
2519         struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2520         struct iwl_txq *txq;
2521         char *buf;
2522         int pos = 0;
2523         int cnt;
2524         int ret;
2525         size_t bufsz;
2526
2527         bufsz = sizeof(char) * 75 *
2528                 trans->trans_cfg->base_params->num_of_queues;
2529
2530         if (!trans_pcie->txq_memory)
2531                 return -EAGAIN;
2532
2533         buf = kzalloc(bufsz, GFP_KERNEL);
2534         if (!buf)
2535                 return -ENOMEM;
2536
2537         for (cnt = 0;
2538              cnt < trans->trans_cfg->base_params->num_of_queues;
2539              cnt++) {
2540                 txq = trans_pcie->txq[cnt];
2541                 pos += scnprintf(buf + pos, bufsz - pos,
2542                                 "hwq %.2d: read=%u write=%u use=%d stop=%d need_update=%d frozen=%d%s\n",
2543                                 cnt, txq->read_ptr, txq->write_ptr,
2544                                 !!test_bit(cnt, trans_pcie->queue_used),
2545                                  !!test_bit(cnt, trans_pcie->queue_stopped),
2546                                  txq->need_update, txq->frozen,
2547                                  (cnt == trans_pcie->cmd_queue ? " HCMD" : ""));
2548         }
2549         ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
2550         kfree(buf);
2551         return ret;
2552 }
2553
2554 static ssize_t iwl_dbgfs_rx_queue_read(struct file *file,
2555                                        char __user *user_buf,
2556                                        size_t count, loff_t *ppos)
2557 {
2558         struct iwl_trans *trans = file->private_data;
2559         struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2560         char *buf;
2561         int pos = 0, i, ret;
2562         size_t bufsz;
2563
2564         bufsz = sizeof(char) * 121 * trans->num_rx_queues;
2565
2566         if (!trans_pcie->rxq)
2567                 return -EAGAIN;
2568
2569         buf = kzalloc(bufsz, GFP_KERNEL);
2570         if (!buf)
2571                 return -ENOMEM;
2572
2573         for (i = 0; i < trans->num_rx_queues && pos < bufsz; i++) {
2574                 struct iwl_rxq *rxq = &trans_pcie->rxq[i];
2575
2576                 pos += scnprintf(buf + pos, bufsz - pos, "queue#: %2d\n",
2577                                  i);
2578                 pos += scnprintf(buf + pos, bufsz - pos, "\tread: %u\n",
2579                                  rxq->read);
2580                 pos += scnprintf(buf + pos, bufsz - pos, "\twrite: %u\n",
2581                                  rxq->write);
2582                 pos += scnprintf(buf + pos, bufsz - pos, "\twrite_actual: %u\n",
2583                                  rxq->write_actual);
2584                 pos += scnprintf(buf + pos, bufsz - pos, "\tneed_update: %2d\n",
2585                                  rxq->need_update);
2586                 pos += scnprintf(buf + pos, bufsz - pos, "\tfree_count: %u\n",
2587                                  rxq->free_count);
2588                 if (rxq->rb_stts) {
2589                         u32 r = __le16_to_cpu(iwl_get_closed_rb_stts(trans,
2590                                                                      rxq));
2591                         pos += scnprintf(buf + pos, bufsz - pos,
2592                                          "\tclosed_rb_num: %u\n",
2593                                          r & 0x0FFF);
2594                 } else {
2595                         pos += scnprintf(buf + pos, bufsz - pos,
2596                                          "\tclosed_rb_num: Not Allocated\n");
2597                 }
2598         }
2599         ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
2600         kfree(buf);
2601
2602         return ret;
2603 }
2604
2605 static ssize_t iwl_dbgfs_interrupt_read(struct file *file,
2606                                         char __user *user_buf,
2607                                         size_t count, loff_t *ppos)
2608 {
2609         struct iwl_trans *trans = file->private_data;
2610         struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2611         struct isr_statistics *isr_stats = &trans_pcie->isr_stats;
2612
2613         int pos = 0;
2614         char *buf;
2615         int bufsz = 24 * 64; /* 24 items * 64 char per item */
2616         ssize_t ret;
2617
2618         buf = kzalloc(bufsz, GFP_KERNEL);
2619         if (!buf)
2620                 return -ENOMEM;
2621
2622         pos += scnprintf(buf + pos, bufsz - pos,
2623                         "Interrupt Statistics Report:\n");
2624
2625         pos += scnprintf(buf + pos, bufsz - pos, "HW Error:\t\t\t %u\n",
2626                 isr_stats->hw);
2627         pos += scnprintf(buf + pos, bufsz - pos, "SW Error:\t\t\t %u\n",
2628                 isr_stats->sw);
2629         if (isr_stats->sw || isr_stats->hw) {
2630                 pos += scnprintf(buf + pos, bufsz - pos,
2631                         "\tLast Restarting Code:  0x%X\n",
2632                         isr_stats->err_code);
2633         }
2634 #ifdef CONFIG_IWLWIFI_DEBUG
2635         pos += scnprintf(buf + pos, bufsz - pos, "Frame transmitted:\t\t %u\n",
2636                 isr_stats->sch);
2637         pos += scnprintf(buf + pos, bufsz - pos, "Alive interrupt:\t\t %u\n",
2638                 isr_stats->alive);
2639 #endif
2640         pos += scnprintf(buf + pos, bufsz - pos,
2641                 "HW RF KILL switch toggled:\t %u\n", isr_stats->rfkill);
2642
2643         pos += scnprintf(buf + pos, bufsz - pos, "CT KILL:\t\t\t %u\n",
2644                 isr_stats->ctkill);
2645
2646         pos += scnprintf(buf + pos, bufsz - pos, "Wakeup Interrupt:\t\t %u\n",
2647                 isr_stats->wakeup);
2648
2649         pos += scnprintf(buf + pos, bufsz - pos,
2650                 "Rx command responses:\t\t %u\n", isr_stats->rx);
2651
2652         pos += scnprintf(buf + pos, bufsz - pos, "Tx/FH interrupt:\t\t %u\n",
2653                 isr_stats->tx);
2654
2655         pos += scnprintf(buf + pos, bufsz - pos, "Unexpected INTA:\t\t %u\n",
2656                 isr_stats->unhandled);
2657
2658         ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
2659         kfree(buf);
2660         return ret;
2661 }
2662
2663 static ssize_t iwl_dbgfs_interrupt_write(struct file *file,
2664                                          const char __user *user_buf,
2665                                          size_t count, loff_t *ppos)
2666 {
2667         struct iwl_trans *trans = file->private_data;
2668         struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2669         struct isr_statistics *isr_stats = &trans_pcie->isr_stats;
2670         u32 reset_flag;
2671         int ret;
2672
2673         ret = kstrtou32_from_user(user_buf, count, 16, &reset_flag);
2674         if (ret)
2675                 return ret;
2676         if (reset_flag == 0)
2677                 memset(isr_stats, 0, sizeof(*isr_stats));
2678
2679         return count;
2680 }
2681
2682 static ssize_t iwl_dbgfs_csr_write(struct file *file,
2683                                    const char __user *user_buf,
2684                                    size_t count, loff_t *ppos)
2685 {
2686         struct iwl_trans *trans = file->private_data;
2687
2688         iwl_pcie_dump_csr(trans);
2689
2690         return count;
2691 }
2692
2693 static ssize_t iwl_dbgfs_fh_reg_read(struct file *file,
2694                                      char __user *user_buf,
2695                                      size_t count, loff_t *ppos)
2696 {
2697         struct iwl_trans *trans = file->private_data;
2698         char *buf = NULL;
2699         ssize_t ret;
2700
2701         ret = iwl_dump_fh(trans, &buf);
2702         if (ret < 0)
2703                 return ret;
2704         if (!buf)
2705                 return -EINVAL;
2706         ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
2707         kfree(buf);
2708         return ret;
2709 }
2710
2711 static ssize_t iwl_dbgfs_rfkill_read(struct file *file,
2712                                      char __user *user_buf,
2713                                      size_t count, loff_t *ppos)
2714 {
2715         struct iwl_trans *trans = file->private_data;
2716         struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2717         char buf[100];
2718         int pos;
2719
2720         pos = scnprintf(buf, sizeof(buf), "debug: %d\nhw: %d\n",
2721                         trans_pcie->debug_rfkill,
2722                         !(iwl_read32(trans, CSR_GP_CNTRL) &
2723                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW));
2724
2725         return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
2726 }
2727
2728 static ssize_t iwl_dbgfs_rfkill_write(struct file *file,
2729                                       const char __user *user_buf,
2730                                       size_t count, loff_t *ppos)
2731 {
2732         struct iwl_trans *trans = file->private_data;
2733         struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2734         bool new_value;
2735         int ret;
2736
2737         ret = kstrtobool_from_user(user_buf, count, &new_value);
2738         if (ret)
2739                 return ret;
2740         if (new_value == trans_pcie->debug_rfkill)
2741                 return count;
2742         IWL_WARN(trans, "changing debug rfkill %d->%d\n",
2743                  trans_pcie->debug_rfkill, new_value);
2744         trans_pcie->debug_rfkill = new_value;
2745         iwl_pcie_handle_rfkill_irq(trans);
2746
2747         return count;
2748 }
2749
2750 static int iwl_dbgfs_monitor_data_open(struct inode *inode,
2751                                        struct file *file)
2752 {
2753         struct iwl_trans *trans = inode->i_private;
2754         struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2755
2756         if (!trans->dbg.dest_tlv ||
2757             trans->dbg.dest_tlv->monitor_mode != EXTERNAL_MODE) {
2758                 IWL_ERR(trans, "Debug destination is not set to DRAM\n");
2759                 return -ENOENT;
2760         }
2761
2762         if (trans_pcie->fw_mon_data.state != IWL_FW_MON_DBGFS_STATE_CLOSED)
2763                 return -EBUSY;
2764
2765         trans_pcie->fw_mon_data.state = IWL_FW_MON_DBGFS_STATE_OPEN;
2766         return simple_open(inode, file);
2767 }
2768
2769 static int iwl_dbgfs_monitor_data_release(struct inode *inode,
2770                                           struct file *file)
2771 {
2772         struct iwl_trans_pcie *trans_pcie =
2773                 IWL_TRANS_GET_PCIE_TRANS(inode->i_private);
2774
2775         if (trans_pcie->fw_mon_data.state == IWL_FW_MON_DBGFS_STATE_OPEN)
2776                 trans_pcie->fw_mon_data.state = IWL_FW_MON_DBGFS_STATE_CLOSED;
2777         return 0;
2778 }
2779
2780 static bool iwl_write_to_user_buf(char __user *user_buf, ssize_t count,
2781                                   void *buf, ssize_t *size,
2782                                   ssize_t *bytes_copied)
2783 {
2784         int buf_size_left = count - *bytes_copied;
2785
2786         buf_size_left = buf_size_left - (buf_size_left % sizeof(u32));
2787         if (*size > buf_size_left)
2788                 *size = buf_size_left;
2789
2790         *size -= copy_to_user(user_buf, buf, *size);
2791         *bytes_copied += *size;
2792
2793         if (buf_size_left == *size)
2794                 return true;
2795         return false;
2796 }
2797
2798 static ssize_t iwl_dbgfs_monitor_data_read(struct file *file,
2799                                            char __user *user_buf,
2800                                            size_t count, loff_t *ppos)
2801 {
2802         struct iwl_trans *trans = file->private_data;
2803         struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2804         void *cpu_addr = (void *)trans->dbg.fw_mon.block, *curr_buf;
2805         struct cont_rec *data = &trans_pcie->fw_mon_data;
2806         u32 write_ptr_addr, wrap_cnt_addr, write_ptr, wrap_cnt;
2807         ssize_t size, bytes_copied = 0;
2808         bool b_full;
2809
2810         if (trans->dbg.dest_tlv) {
2811                 write_ptr_addr =
2812                         le32_to_cpu(trans->dbg.dest_tlv->write_ptr_reg);
2813                 wrap_cnt_addr = le32_to_cpu(trans->dbg.dest_tlv->wrap_count);
2814         } else {
2815                 write_ptr_addr = MON_BUFF_WRPTR;
2816                 wrap_cnt_addr = MON_BUFF_CYCLE_CNT;
2817         }
2818
2819         if (unlikely(!trans->dbg.rec_on))
2820                 return 0;
2821
2822         mutex_lock(&data->mutex);
2823         if (data->state ==
2824             IWL_FW_MON_DBGFS_STATE_DISABLED) {
2825                 mutex_unlock(&data->mutex);
2826                 return 0;
2827         }
2828
2829         /* write_ptr position in bytes rather then DW */
2830         write_ptr = iwl_read_prph(trans, write_ptr_addr) * sizeof(u32);
2831         wrap_cnt = iwl_read_prph(trans, wrap_cnt_addr);
2832
2833         if (data->prev_wrap_cnt == wrap_cnt) {
2834                 size = write_ptr - data->prev_wr_ptr;
2835                 curr_buf = cpu_addr + data->prev_wr_ptr;
2836                 b_full = iwl_write_to_user_buf(user_buf, count,
2837                                                curr_buf, &size,
2838                                                &bytes_copied);
2839                 data->prev_wr_ptr += size;
2840
2841         } else if (data->prev_wrap_cnt == wrap_cnt - 1 &&
2842                    write_ptr < data->prev_wr_ptr) {
2843                 size = trans->dbg.fw_mon.size - data->prev_wr_ptr;
2844                 curr_buf = cpu_addr + data->prev_wr_ptr;
2845                 b_full = iwl_write_to_user_buf(user_buf, count,
2846                                                curr_buf, &size,
2847                                                &bytes_copied);
2848                 data->prev_wr_ptr += size;
2849
2850                 if (!b_full) {
2851                         size = write_ptr;
2852                         b_full = iwl_write_to_user_buf(user_buf, count,
2853                                                        cpu_addr, &size,
2854                                                        &bytes_copied);
2855                         data->prev_wr_ptr = size;
2856                         data->prev_wrap_cnt++;
2857                 }
2858         } else {
2859                 if (data->prev_wrap_cnt == wrap_cnt - 1 &&
2860                     write_ptr > data->prev_wr_ptr)
2861                         IWL_WARN(trans,
2862                                  "write pointer passed previous write pointer, start copying from the beginning\n");
2863                 else if (!unlikely(data->prev_wrap_cnt == 0 &&
2864                                    data->prev_wr_ptr == 0))
2865                         IWL_WARN(trans,
2866                                  "monitor data is out of sync, start copying from the beginning\n");
2867
2868                 size = write_ptr;
2869                 b_full = iwl_write_to_user_buf(user_buf, count,
2870                                                cpu_addr, &size,
2871                                                &bytes_copied);
2872                 data->prev_wr_ptr = size;
2873                 data->prev_wrap_cnt = wrap_cnt;
2874         }
2875
2876         mutex_unlock(&data->mutex);
2877
2878         return bytes_copied;
2879 }
2880
2881 DEBUGFS_READ_WRITE_FILE_OPS(interrupt);
2882 DEBUGFS_READ_FILE_OPS(fh_reg);
2883 DEBUGFS_READ_FILE_OPS(rx_queue);
2884 DEBUGFS_READ_FILE_OPS(tx_queue);
2885 DEBUGFS_WRITE_FILE_OPS(csr);
2886 DEBUGFS_READ_WRITE_FILE_OPS(rfkill);
2887
2888 static const struct file_operations iwl_dbgfs_monitor_data_ops = {
2889         .read = iwl_dbgfs_monitor_data_read,
2890         .open = iwl_dbgfs_monitor_data_open,
2891         .release = iwl_dbgfs_monitor_data_release,
2892 };
2893
2894 /* Create the debugfs files and directories */
2895 void iwl_trans_pcie_dbgfs_register(struct iwl_trans *trans)
2896 {
2897         struct dentry *dir = trans->dbgfs_dir;
2898
2899         DEBUGFS_ADD_FILE(rx_queue, dir, 0400);
2900         DEBUGFS_ADD_FILE(tx_queue, dir, 0400);
2901         DEBUGFS_ADD_FILE(interrupt, dir, 0600);
2902         DEBUGFS_ADD_FILE(csr, dir, 0200);
2903         DEBUGFS_ADD_FILE(fh_reg, dir, 0400);
2904         DEBUGFS_ADD_FILE(rfkill, dir, 0600);
2905         DEBUGFS_ADD_FILE(monitor_data, dir, 0400);
2906 }
2907
2908 static void iwl_trans_pcie_debugfs_cleanup(struct iwl_trans *trans)
2909 {
2910         struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2911         struct cont_rec *data = &trans_pcie->fw_mon_data;
2912
2913         mutex_lock(&data->mutex);
2914         data->state = IWL_FW_MON_DBGFS_STATE_DISABLED;
2915         mutex_unlock(&data->mutex);
2916 }
2917 #endif /*CONFIG_IWLWIFI_DEBUGFS */
2918
2919 static u32 iwl_trans_pcie_get_cmdlen(struct iwl_trans *trans, void *tfd)
2920 {
2921         struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2922         u32 cmdlen = 0;
2923         int i;
2924
2925         for (i = 0; i < trans_pcie->max_tbs; i++)
2926                 cmdlen += iwl_pcie_tfd_tb_get_len(trans, tfd, i);
2927
2928         return cmdlen;
2929 }
2930
2931 static u32 iwl_trans_pcie_dump_rbs(struct iwl_trans *trans,
2932                                    struct iwl_fw_error_dump_data **data,
2933                                    int allocated_rb_nums)
2934 {
2935         struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2936         int max_len = PAGE_SIZE << trans_pcie->rx_page_order;
2937         /* Dump RBs is supported only for pre-9000 devices (1 queue) */
2938         struct iwl_rxq *rxq = &trans_pcie->rxq[0];
2939         u32 i, r, j, rb_len = 0;
2940
2941         spin_lock(&rxq->lock);
2942
2943         r = le16_to_cpu(iwl_get_closed_rb_stts(trans, rxq)) & 0x0FFF;
2944
2945         for (i = rxq->read, j = 0;
2946              i != r && j < allocated_rb_nums;
2947              i = (i + 1) & RX_QUEUE_MASK, j++) {
2948                 struct iwl_rx_mem_buffer *rxb = rxq->queue[i];
2949                 struct iwl_fw_error_dump_rb *rb;
2950
2951                 dma_unmap_page(trans->dev, rxb->page_dma, max_len,
2952                                DMA_FROM_DEVICE);
2953
2954                 rb_len += sizeof(**data) + sizeof(*rb) + max_len;
2955
2956                 (*data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_RB);
2957                 (*data)->len = cpu_to_le32(sizeof(*rb) + max_len);
2958                 rb = (void *)(*data)->data;
2959                 rb->index = cpu_to_le32(i);
2960                 memcpy(rb->data, page_address(rxb->page), max_len);
2961                 /* remap the page for the free benefit */
2962                 rxb->page_dma = dma_map_page(trans->dev, rxb->page, 0,
2963                                                      max_len,
2964                                                      DMA_FROM_DEVICE);
2965
2966                 *data = iwl_fw_error_next_data(*data);
2967         }
2968
2969         spin_unlock(&rxq->lock);
2970
2971         return rb_len;
2972 }
2973 #define IWL_CSR_TO_DUMP (0x250)
2974
2975 static u32 iwl_trans_pcie_dump_csr(struct iwl_trans *trans,
2976                                    struct iwl_fw_error_dump_data **data)
2977 {
2978         u32 csr_len = sizeof(**data) + IWL_CSR_TO_DUMP;
2979         __le32 *val;
2980         int i;
2981
2982         (*data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_CSR);
2983         (*data)->len = cpu_to_le32(IWL_CSR_TO_DUMP);
2984         val = (void *)(*data)->data;
2985
2986         for (i = 0; i < IWL_CSR_TO_DUMP; i += 4)
2987                 *val++ = cpu_to_le32(iwl_trans_pcie_read32(trans, i));
2988
2989         *data = iwl_fw_error_next_data(*data);
2990
2991         return csr_len;
2992 }
2993
2994 static u32 iwl_trans_pcie_fh_regs_dump(struct iwl_trans *trans,
2995                                        struct iwl_fw_error_dump_data **data)
2996 {
2997         u32 fh_regs_len = FH_MEM_UPPER_BOUND - FH_MEM_LOWER_BOUND;
2998         unsigned long flags;
2999         __le32 *val;
3000         int i;
3001
3002         if (!iwl_trans_grab_nic_access(trans, &flags))
3003                 return 0;
3004
3005         (*data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_FH_REGS);
3006         (*data)->len = cpu_to_le32(fh_regs_len);
3007         val = (void *)(*data)->data;
3008
3009         if (!trans->trans_cfg->gen2)
3010                 for (i = FH_MEM_LOWER_BOUND; i < FH_MEM_UPPER_BOUND;
3011                      i += sizeof(u32))
3012                         *val++ = cpu_to_le32(iwl_trans_pcie_read32(trans, i));
3013         else
3014                 for (i = iwl_umac_prph(trans, FH_MEM_LOWER_BOUND_GEN2);
3015                      i < iwl_umac_prph(trans, FH_MEM_UPPER_BOUND_GEN2);
3016                      i += sizeof(u32))
3017                         *val++ = cpu_to_le32(iwl_trans_pcie_read_prph(trans,
3018                                                                       i));
3019
3020         iwl_trans_release_nic_access(trans, &flags);
3021
3022         *data = iwl_fw_error_next_data(*data);
3023
3024         return sizeof(**data) + fh_regs_len;
3025 }
3026
3027 static u32
3028 iwl_trans_pci_dump_marbh_monitor(struct iwl_trans *trans,
3029                                  struct iwl_fw_error_dump_fw_mon *fw_mon_data,
3030                                  u32 monitor_len)
3031 {
3032         u32 buf_size_in_dwords = (monitor_len >> 2);
3033         u32 *buffer = (u32 *)fw_mon_data->data;
3034         unsigned long flags;
3035         u32 i;
3036
3037         if (!iwl_trans_grab_nic_access(trans, &flags))
3038                 return 0;
3039
3040         iwl_write_umac_prph_no_grab(trans, MON_DMARB_RD_CTL_ADDR, 0x1);
3041         for (i = 0; i < buf_size_in_dwords; i++)
3042                 buffer[i] = iwl_read_umac_prph_no_grab(trans,
3043                                                        MON_DMARB_RD_DATA_ADDR);
3044         iwl_write_umac_prph_no_grab(trans, MON_DMARB_RD_CTL_ADDR, 0x0);
3045
3046         iwl_trans_release_nic_access(trans, &flags);
3047
3048         return monitor_len;
3049 }
3050
3051 static void
3052 iwl_trans_pcie_dump_pointers(struct iwl_trans *trans,
3053                              struct iwl_fw_error_dump_fw_mon *fw_mon_data)
3054 {
3055         u32 base, base_high, write_ptr, write_ptr_val, wrap_cnt;
3056
3057         if (trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_AX210) {
3058                 base = DBGC_CUR_DBGBUF_BASE_ADDR_LSB;
3059                 base_high = DBGC_CUR_DBGBUF_BASE_ADDR_MSB;
3060                 write_ptr = DBGC_CUR_DBGBUF_STATUS;
3061                 wrap_cnt = DBGC_DBGBUF_WRAP_AROUND;
3062         } else if (trans->dbg.dest_tlv) {
3063                 write_ptr = le32_to_cpu(trans->dbg.dest_tlv->write_ptr_reg);
3064                 wrap_cnt = le32_to_cpu(trans->dbg.dest_tlv->wrap_count);
3065                 base = le32_to_cpu(trans->dbg.dest_tlv->base_reg);
3066         } else {
3067                 base = MON_BUFF_BASE_ADDR;
3068                 write_ptr = MON_BUFF_WRPTR;
3069                 wrap_cnt = MON_BUFF_CYCLE_CNT;
3070         }
3071
3072         write_ptr_val = iwl_read_prph(trans, write_ptr);
3073         fw_mon_data->fw_mon_cycle_cnt =
3074                 cpu_to_le32(iwl_read_prph(trans, wrap_cnt));
3075         fw_mon_data->fw_mon_base_ptr =
3076                 cpu_to_le32(iwl_read_prph(trans, base));
3077         if (trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_AX210) {
3078                 fw_mon_data->fw_mon_base_high_ptr =
3079                         cpu_to_le32(iwl_read_prph(trans, base_high));
3080                 write_ptr_val &= DBGC_CUR_DBGBUF_STATUS_OFFSET_MSK;
3081         }
3082         fw_mon_data->fw_mon_wr_ptr = cpu_to_le32(write_ptr_val);
3083 }
3084
3085 static u32
3086 iwl_trans_pcie_dump_monitor(struct iwl_trans *trans,
3087                             struct iwl_fw_error_dump_data **data,
3088                             u32 monitor_len)
3089 {
3090         struct iwl_dram_data *fw_mon = &trans->dbg.fw_mon;
3091         u32 len = 0;
3092
3093         if (trans->dbg.dest_tlv ||
3094             (fw_mon->size &&
3095              (trans->trans_cfg->device_family == IWL_DEVICE_FAMILY_7000 ||
3096               trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_AX210))) {
3097                 struct iwl_fw_error_dump_fw_mon *fw_mon_data;
3098
3099                 (*data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_FW_MONITOR);
3100                 fw_mon_data = (void *)(*data)->data;
3101
3102                 iwl_trans_pcie_dump_pointers(trans, fw_mon_data);
3103
3104                 len += sizeof(**data) + sizeof(*fw_mon_data);
3105                 if (fw_mon->size) {
3106                         memcpy(fw_mon_data->data, fw_mon->block, fw_mon->size);
3107                         monitor_len = fw_mon->size;
3108                 } else if (trans->dbg.dest_tlv->monitor_mode == SMEM_MODE) {
3109                         u32 base = le32_to_cpu(fw_mon_data->fw_mon_base_ptr);
3110                         /*
3111                          * Update pointers to reflect actual values after
3112                          * shifting
3113                          */
3114                         if (trans->dbg.dest_tlv->version) {
3115                                 base = (iwl_read_prph(trans, base) &
3116                                         IWL_LDBG_M2S_BUF_BA_MSK) <<
3117                                        trans->dbg.dest_tlv->base_shift;
3118                                 base *= IWL_M2S_UNIT_SIZE;
3119                                 base += trans->cfg->smem_offset;
3120                         } else {
3121                                 base = iwl_read_prph(trans, base) <<
3122                                        trans->dbg.dest_tlv->base_shift;
3123                         }
3124
3125                         iwl_trans_read_mem(trans, base, fw_mon_data->data,
3126                                            monitor_len / sizeof(u32));
3127                 } else if (trans->dbg.dest_tlv->monitor_mode == MARBH_MODE) {
3128                         monitor_len =
3129                                 iwl_trans_pci_dump_marbh_monitor(trans,
3130                                                                  fw_mon_data,
3131                                                                  monitor_len);
3132                 } else {
3133                         /* Didn't match anything - output no monitor data */
3134                         monitor_len = 0;
3135                 }
3136
3137                 len += monitor_len;
3138                 (*data)->len = cpu_to_le32(monitor_len + sizeof(*fw_mon_data));
3139         }
3140
3141         return len;
3142 }
3143
3144 static int iwl_trans_get_fw_monitor_len(struct iwl_trans *trans, u32 *len)
3145 {
3146         if (trans->dbg.fw_mon.size) {
3147                 *len += sizeof(struct iwl_fw_error_dump_data) +
3148                         sizeof(struct iwl_fw_error_dump_fw_mon) +
3149                         trans->dbg.fw_mon.size;
3150                 return trans->dbg.fw_mon.size;
3151         } else if (trans->dbg.dest_tlv) {
3152                 u32 base, end, cfg_reg, monitor_len;
3153
3154                 if (trans->dbg.dest_tlv->version == 1) {
3155                         cfg_reg = le32_to_cpu(trans->dbg.dest_tlv->base_reg);
3156                         cfg_reg = iwl_read_prph(trans, cfg_reg);
3157                         base = (cfg_reg & IWL_LDBG_M2S_BUF_BA_MSK) <<
3158                                 trans->dbg.dest_tlv->base_shift;
3159                         base *= IWL_M2S_UNIT_SIZE;
3160                         base += trans->cfg->smem_offset;
3161
3162                         monitor_len =
3163                                 (cfg_reg & IWL_LDBG_M2S_BUF_SIZE_MSK) >>
3164                                 trans->dbg.dest_tlv->end_shift;
3165                         monitor_len *= IWL_M2S_UNIT_SIZE;
3166                 } else {
3167                         base = le32_to_cpu(trans->dbg.dest_tlv->base_reg);
3168                         end = le32_to_cpu(trans->dbg.dest_tlv->end_reg);
3169
3170                         base = iwl_read_prph(trans, base) <<
3171                                trans->dbg.dest_tlv->base_shift;
3172                         end = iwl_read_prph(trans, end) <<
3173                               trans->dbg.dest_tlv->end_shift;
3174
3175                         /* Make "end" point to the actual end */
3176                         if (trans->trans_cfg->device_family >=
3177                             IWL_DEVICE_FAMILY_8000 ||
3178                             trans->dbg.dest_tlv->monitor_mode == MARBH_MODE)
3179                                 end += (1 << trans->dbg.dest_tlv->end_shift);
3180                         monitor_len = end - base;
3181                 }
3182                 *len += sizeof(struct iwl_fw_error_dump_data) +
3183                         sizeof(struct iwl_fw_error_dump_fw_mon) +
3184                         monitor_len;
3185                 return monitor_len;
3186         }
3187         return 0;
3188 }
3189
3190 static struct iwl_trans_dump_data
3191 *iwl_trans_pcie_dump_data(struct iwl_trans *trans,
3192                           u32 dump_mask)
3193 {
3194         struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
3195         struct iwl_fw_error_dump_data *data;
3196         struct iwl_txq *cmdq = trans_pcie->txq[trans_pcie->cmd_queue];
3197         struct iwl_fw_error_dump_txcmd *txcmd;
3198         struct iwl_trans_dump_data *dump_data;
3199         u32 len, num_rbs = 0, monitor_len = 0;
3200         int i, ptr;
3201         bool dump_rbs = test_bit(STATUS_FW_ERROR, &trans->status) &&
3202                         !trans->trans_cfg->mq_rx_supported &&
3203                         dump_mask & BIT(IWL_FW_ERROR_DUMP_RB);
3204
3205         if (!dump_mask)
3206                 return NULL;
3207
3208         /* transport dump header */
3209         len = sizeof(*dump_data);
3210
3211         /* host commands */
3212         if (dump_mask & BIT(IWL_FW_ERROR_DUMP_TXCMD) && cmdq)
3213                 len += sizeof(*data) +
3214                         cmdq->n_window * (sizeof(*txcmd) +
3215                                           TFD_MAX_PAYLOAD_SIZE);
3216
3217         /* FW monitor */
3218         if (dump_mask & BIT(IWL_FW_ERROR_DUMP_FW_MONITOR))
3219                 monitor_len = iwl_trans_get_fw_monitor_len(trans, &len);
3220
3221         /* CSR registers */
3222         if (dump_mask & BIT(IWL_FW_ERROR_DUMP_CSR))
3223                 len += sizeof(*data) + IWL_CSR_TO_DUMP;
3224
3225         /* FH registers */
3226         if (dump_mask & BIT(IWL_FW_ERROR_DUMP_FH_REGS)) {
3227                 if (trans->trans_cfg->gen2)
3228                         len += sizeof(*data) +
3229                                (iwl_umac_prph(trans, FH_MEM_UPPER_BOUND_GEN2) -
3230                                 iwl_umac_prph(trans, FH_MEM_LOWER_BOUND_GEN2));
3231                 else
3232                         len += sizeof(*data) +
3233                                (FH_MEM_UPPER_BOUND -
3234                                 FH_MEM_LOWER_BOUND);
3235         }
3236
3237         if (dump_rbs) {
3238                 /* Dump RBs is supported only for pre-9000 devices (1 queue) */
3239                 struct iwl_rxq *rxq = &trans_pcie->rxq[0];
3240                 /* RBs */
3241                 num_rbs =
3242                         le16_to_cpu(iwl_get_closed_rb_stts(trans, rxq))
3243                         & 0x0FFF;
3244                 num_rbs = (num_rbs - rxq->read) & RX_QUEUE_MASK;
3245                 len += num_rbs * (sizeof(*data) +
3246                                   sizeof(struct iwl_fw_error_dump_rb) +
3247                                   (PAGE_SIZE << trans_pcie->rx_page_order));
3248         }
3249
3250         /* Paged memory for gen2 HW */
3251         if (trans->trans_cfg->gen2 && dump_mask & BIT(IWL_FW_ERROR_DUMP_PAGING))
3252                 for (i = 0; i < trans->init_dram.paging_cnt; i++)
3253                         len += sizeof(*data) +
3254                                sizeof(struct iwl_fw_error_dump_paging) +
3255                                trans->init_dram.paging[i].size;
3256
3257         dump_data = vzalloc(len);
3258         if (!dump_data)
3259                 return NULL;
3260
3261         len = 0;
3262         data = (void *)dump_data->data;
3263
3264         if (dump_mask & BIT(IWL_FW_ERROR_DUMP_TXCMD) && cmdq) {
3265                 u16 tfd_size = trans_pcie->tfd_size;
3266
3267                 data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_TXCMD);
3268                 txcmd = (void *)data->data;
3269                 spin_lock_bh(&cmdq->lock);
3270                 ptr = cmdq->write_ptr;
3271                 for (i = 0; i < cmdq->n_window; i++) {
3272                         u8 idx = iwl_pcie_get_cmd_index(cmdq, ptr);
3273                         u8 tfdidx;
3274                         u32 caplen, cmdlen;
3275
3276                         if (trans->trans_cfg->use_tfh)
3277                                 tfdidx = idx;
3278                         else
3279                                 tfdidx = ptr;
3280
3281                         cmdlen = iwl_trans_pcie_get_cmdlen(trans,
3282                                                            (u8 *)cmdq->tfds +
3283                                                            tfd_size * tfdidx);
3284                         caplen = min_t(u32, TFD_MAX_PAYLOAD_SIZE, cmdlen);
3285
3286                         if (cmdlen) {
3287                                 len += sizeof(*txcmd) + caplen;
3288                                 txcmd->cmdlen = cpu_to_le32(cmdlen);
3289                                 txcmd->caplen = cpu_to_le32(caplen);
3290                                 memcpy(txcmd->data, cmdq->entries[idx].cmd,
3291                                        caplen);
3292                                 txcmd = (void *)((u8 *)txcmd->data + caplen);
3293                         }
3294
3295                         ptr = iwl_queue_dec_wrap(trans, ptr);
3296                 }
3297                 spin_unlock_bh(&cmdq->lock);
3298
3299                 data->len = cpu_to_le32(len);
3300                 len += sizeof(*data);
3301                 data = iwl_fw_error_next_data(data);
3302         }
3303
3304         if (dump_mask & BIT(IWL_FW_ERROR_DUMP_CSR))
3305                 len += iwl_trans_pcie_dump_csr(trans, &data);
3306         if (dump_mask & BIT(IWL_FW_ERROR_DUMP_FH_REGS))
3307                 len += iwl_trans_pcie_fh_regs_dump(trans, &data);
3308         if (dump_rbs)
3309                 len += iwl_trans_pcie_dump_rbs(trans, &data, num_rbs);
3310
3311         /* Paged memory for gen2 HW */
3312         if (trans->trans_cfg->gen2 &&
3313             dump_mask & BIT(IWL_FW_ERROR_DUMP_PAGING)) {
3314                 for (i = 0; i < trans->init_dram.paging_cnt; i++) {
3315                         struct iwl_fw_error_dump_paging *paging;
3316                         u32 page_len = trans->init_dram.paging[i].size;
3317
3318                         data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_PAGING);
3319                         data->len = cpu_to_le32(sizeof(*paging) + page_len);
3320                         paging = (void *)data->data;
3321                         paging->index = cpu_to_le32(i);
3322                         memcpy(paging->data,
3323                                trans->init_dram.paging[i].block, page_len);
3324                         data = iwl_fw_error_next_data(data);
3325
3326                         len += sizeof(*data) + sizeof(*paging) + page_len;
3327                 }
3328         }
3329         if (dump_mask & BIT(IWL_FW_ERROR_DUMP_FW_MONITOR))
3330                 len += iwl_trans_pcie_dump_monitor(trans, &data, monitor_len);
3331
3332         dump_data->len = len;
3333
3334         return dump_data;
3335 }
3336
3337 #ifdef CONFIG_PM_SLEEP
3338 static int iwl_trans_pcie_suspend(struct iwl_trans *trans)
3339 {
3340         return 0;
3341 }
3342
3343 static void iwl_trans_pcie_resume(struct iwl_trans *trans)
3344 {
3345 }
3346 #endif /* CONFIG_PM_SLEEP */
3347
3348 #define IWL_TRANS_COMMON_OPS                                            \
3349         .op_mode_leave = iwl_trans_pcie_op_mode_leave,                  \
3350         .write8 = iwl_trans_pcie_write8,                                \
3351         .write32 = iwl_trans_pcie_write32,                              \
3352         .read32 = iwl_trans_pcie_read32,                                \
3353         .read_prph = iwl_trans_pcie_read_prph,                          \
3354         .write_prph = iwl_trans_pcie_write_prph,                        \
3355         .read_mem = iwl_trans_pcie_read_mem,                            \
3356         .write_mem = iwl_trans_pcie_write_mem,                          \
3357         .configure = iwl_trans_pcie_configure,                          \
3358         .set_pmi = iwl_trans_pcie_set_pmi,                              \
3359         .sw_reset = iwl_trans_pcie_sw_reset,                            \
3360         .grab_nic_access = iwl_trans_pcie_grab_nic_access,              \
3361         .release_nic_access = iwl_trans_pcie_release_nic_access,        \
3362         .set_bits_mask = iwl_trans_pcie_set_bits_mask,                  \
3363         .dump_data = iwl_trans_pcie_dump_data,                          \
3364         .d3_suspend = iwl_trans_pcie_d3_suspend,                        \
3365         .d3_resume = iwl_trans_pcie_d3_resume,                          \
3366         .sync_nmi = iwl_trans_pcie_sync_nmi
3367
3368 #ifdef CONFIG_PM_SLEEP
3369 #define IWL_TRANS_PM_OPS                                                \
3370         .suspend = iwl_trans_pcie_suspend,                              \
3371         .resume = iwl_trans_pcie_resume,
3372 #else
3373 #define IWL_TRANS_PM_OPS
3374 #endif /* CONFIG_PM_SLEEP */
3375
3376 static const struct iwl_trans_ops trans_ops_pcie = {
3377         IWL_TRANS_COMMON_OPS,
3378         IWL_TRANS_PM_OPS
3379         .start_hw = iwl_trans_pcie_start_hw,
3380         .fw_alive = iwl_trans_pcie_fw_alive,
3381         .start_fw = iwl_trans_pcie_start_fw,
3382         .stop_device = iwl_trans_pcie_stop_device,
3383
3384         .send_cmd = iwl_trans_pcie_send_hcmd,
3385
3386         .tx = iwl_trans_pcie_tx,
3387         .reclaim = iwl_trans_pcie_reclaim,
3388
3389         .txq_disable = iwl_trans_pcie_txq_disable,
3390         .txq_enable = iwl_trans_pcie_txq_enable,
3391
3392         .txq_set_shared_mode = iwl_trans_pcie_txq_set_shared_mode,
3393
3394         .wait_tx_queues_empty = iwl_trans_pcie_wait_txqs_empty,
3395
3396         .freeze_txq_timer = iwl_trans_pcie_freeze_txq_timer,
3397         .block_txq_ptrs = iwl_trans_pcie_block_txq_ptrs,
3398 #ifdef CONFIG_IWLWIFI_DEBUGFS
3399         .debugfs_cleanup = iwl_trans_pcie_debugfs_cleanup,
3400 #endif
3401 };
3402
3403 static const struct iwl_trans_ops trans_ops_pcie_gen2 = {
3404         IWL_TRANS_COMMON_OPS,
3405         IWL_TRANS_PM_OPS
3406         .start_hw = iwl_trans_pcie_start_hw,
3407         .fw_alive = iwl_trans_pcie_gen2_fw_alive,
3408         .start_fw = iwl_trans_pcie_gen2_start_fw,
3409         .stop_device = iwl_trans_pcie_gen2_stop_device,
3410
3411         .send_cmd = iwl_trans_pcie_gen2_send_hcmd,
3412
3413         .tx = iwl_trans_pcie_gen2_tx,
3414         .reclaim = iwl_trans_pcie_reclaim,
3415
3416         .set_q_ptrs = iwl_trans_pcie_set_q_ptrs,
3417
3418         .txq_alloc = iwl_trans_pcie_dyn_txq_alloc,
3419         .txq_free = iwl_trans_pcie_dyn_txq_free,
3420         .wait_txq_empty = iwl_trans_pcie_wait_txq_empty,
3421         .rxq_dma_data = iwl_trans_pcie_rxq_dma_data,
3422 #ifdef CONFIG_IWLWIFI_DEBUGFS
3423         .debugfs_cleanup = iwl_trans_pcie_debugfs_cleanup,
3424 #endif
3425 };
3426
3427 struct iwl_trans *iwl_trans_pcie_alloc(struct pci_dev *pdev,
3428                                const struct pci_device_id *ent,
3429                                const struct iwl_cfg_trans_params *cfg_trans)
3430 {
3431         struct iwl_trans_pcie *trans_pcie;
3432         struct iwl_trans *trans;
3433         int ret, addr_size;
3434
3435         ret = pcim_enable_device(pdev);
3436         if (ret)
3437                 return ERR_PTR(ret);
3438
3439         if (cfg_trans->gen2)
3440                 trans = iwl_trans_alloc(sizeof(struct iwl_trans_pcie),
3441                                         &pdev->dev, &trans_ops_pcie_gen2);
3442         else
3443                 trans = iwl_trans_alloc(sizeof(struct iwl_trans_pcie),
3444                                         &pdev->dev, &trans_ops_pcie);
3445
3446         if (!trans)
3447                 return ERR_PTR(-ENOMEM);
3448
3449         trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
3450
3451         trans_pcie->trans = trans;
3452         trans_pcie->opmode_down = true;
3453         spin_lock_init(&trans_pcie->irq_lock);
3454         spin_lock_init(&trans_pcie->reg_lock);
3455         mutex_init(&trans_pcie->mutex);
3456         init_waitqueue_head(&trans_pcie->ucode_write_waitq);
3457
3458         trans_pcie->rba.alloc_wq = alloc_workqueue("rb_allocator",
3459                                                    WQ_HIGHPRI | WQ_UNBOUND, 1);
3460         if (!trans_pcie->rba.alloc_wq) {
3461                 ret = -ENOMEM;
3462                 goto out_free_trans;
3463         }
3464         INIT_WORK(&trans_pcie->rba.rx_alloc, iwl_pcie_rx_allocator_work);
3465
3466         trans_pcie->tso_hdr_page = alloc_percpu(struct iwl_tso_hdr_page);
3467         if (!trans_pcie->tso_hdr_page) {
3468                 ret = -ENOMEM;
3469                 goto out_no_pci;
3470         }
3471         trans_pcie->debug_rfkill = -1;
3472
3473         if (!cfg_trans->base_params->pcie_l1_allowed) {
3474                 /*
3475                  * W/A - seems to solve weird behavior. We need to remove this
3476                  * if we don't want to stay in L1 all the time. This wastes a
3477                  * lot of power.
3478                  */
3479                 pci_disable_link_state(pdev, PCIE_LINK_STATE_L0S |
3480                                        PCIE_LINK_STATE_L1 |
3481                                        PCIE_LINK_STATE_CLKPM);
3482         }
3483
3484         trans_pcie->def_rx_queue = 0;
3485
3486         if (cfg_trans->use_tfh) {
3487                 addr_size = 64;
3488                 trans_pcie->max_tbs = IWL_TFH_NUM_TBS;
3489                 trans_pcie->tfd_size = sizeof(struct iwl_tfh_tfd);
3490         } else {
3491                 addr_size = 36;
3492                 trans_pcie->max_tbs = IWL_NUM_OF_TBS;
3493                 trans_pcie->tfd_size = sizeof(struct iwl_tfd);
3494         }
3495         trans->max_skb_frags = IWL_PCIE_MAX_FRAGS(trans_pcie);
3496
3497         pci_set_master(pdev);
3498
3499         ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(addr_size));
3500         if (!ret)
3501                 ret = pci_set_consistent_dma_mask(pdev,
3502                                                   DMA_BIT_MASK(addr_size));
3503         if (ret) {
3504                 ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3505                 if (!ret)
3506                         ret = pci_set_consistent_dma_mask(pdev,
3507                                                           DMA_BIT_MASK(32));
3508                 /* both attempts failed: */
3509                 if (ret) {
3510                         dev_err(&pdev->dev, "No suitable DMA available\n");
3511                         goto out_no_pci;
3512                 }
3513         }
3514
3515         ret = pcim_iomap_regions_request_all(pdev, BIT(0), DRV_NAME);
3516         if (ret) {
3517                 dev_err(&pdev->dev, "pcim_iomap_regions_request_all failed\n");
3518                 goto out_no_pci;
3519         }
3520
3521         trans_pcie->hw_base = pcim_iomap_table(pdev)[0];
3522         if (!trans_pcie->hw_base) {
3523                 dev_err(&pdev->dev, "pcim_iomap_table failed\n");
3524                 ret = -ENODEV;
3525                 goto out_no_pci;
3526         }
3527
3528         /* We disable the RETRY_TIMEOUT register (0x41) to keep
3529          * PCI Tx retries from interfering with C3 CPU state */
3530         pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
3531
3532         trans_pcie->pci_dev = pdev;
3533         iwl_disable_interrupts(trans);
3534
3535         trans->hw_rev = iwl_read32(trans, CSR_HW_REV);
3536         if (trans->hw_rev == 0xffffffff) {
3537                 dev_err(&pdev->dev, "HW_REV=0xFFFFFFFF, PCI issues?\n");
3538                 ret = -EIO;
3539                 goto out_no_pci;
3540         }
3541
3542         /*
3543          * In the 8000 HW family the format of the 4 bytes of CSR_HW_REV have
3544          * changed, and now the revision step also includes bit 0-1 (no more
3545          * "dash" value). To keep hw_rev backwards compatible - we'll store it
3546          * in the old format.
3547          */
3548         if (cfg_trans->device_family >= IWL_DEVICE_FAMILY_8000) {
3549                 trans->hw_rev = (trans->hw_rev & 0xfff0) |
3550                                 (CSR_HW_REV_STEP(trans->hw_rev << 2) << 2);
3551
3552                 ret = iwl_pcie_prepare_card_hw(trans);
3553                 if (ret) {
3554                         IWL_WARN(trans, "Exit HW not ready\n");
3555                         goto out_no_pci;
3556                 }
3557
3558                 /*
3559                  * in-order to recognize C step driver should read chip version
3560                  * id located at the AUX bus MISC address space.
3561                  */
3562                 ret = iwl_finish_nic_init(trans, cfg_trans);
3563                 if (ret)
3564                         goto out_no_pci;
3565
3566         }
3567
3568         IWL_DEBUG_INFO(trans, "HW REV: 0x%0x\n", trans->hw_rev);
3569
3570         iwl_pcie_set_interrupt_capa(pdev, trans, cfg_trans);
3571         trans->hw_id = (pdev->device << 16) + pdev->subsystem_device;
3572         snprintf(trans->hw_id_str, sizeof(trans->hw_id_str),
3573                  "PCI ID: 0x%04X:0x%04X", pdev->device, pdev->subsystem_device);
3574
3575         /* Initialize the wait queue for commands */
3576         init_waitqueue_head(&trans_pcie->wait_command_queue);
3577
3578         init_waitqueue_head(&trans_pcie->sx_waitq);
3579
3580         if (trans_pcie->msix_enabled) {
3581                 ret = iwl_pcie_init_msix_handler(pdev, trans_pcie);
3582                 if (ret)
3583                         goto out_no_pci;
3584          } else {
3585                 ret = iwl_pcie_alloc_ict(trans);
3586                 if (ret)
3587                         goto out_no_pci;
3588
3589                 ret = devm_request_threaded_irq(&pdev->dev, pdev->irq,
3590                                                 iwl_pcie_isr,
3591                                                 iwl_pcie_irq_handler,
3592                                                 IRQF_SHARED, DRV_NAME, trans);
3593                 if (ret) {
3594                         IWL_ERR(trans, "Error allocating IRQ %d\n", pdev->irq);
3595                         goto out_free_ict;
3596                 }
3597                 trans_pcie->inta_mask = CSR_INI_SET_MASK;
3598          }
3599
3600 #ifdef CONFIG_IWLWIFI_DEBUGFS
3601         trans_pcie->fw_mon_data.state = IWL_FW_MON_DBGFS_STATE_CLOSED;
3602         mutex_init(&trans_pcie->fw_mon_data.mutex);
3603 #endif
3604
3605         iwl_dbg_tlv_init(trans);
3606
3607         return trans;
3608
3609 out_free_ict:
3610         iwl_pcie_free_ict(trans);
3611 out_no_pci:
3612         free_percpu(trans_pcie->tso_hdr_page);
3613         destroy_workqueue(trans_pcie->rba.alloc_wq);
3614 out_free_trans:
3615         iwl_trans_free(trans);
3616         return ERR_PTR(ret);
3617 }
3618
3619 void iwl_trans_pcie_sync_nmi(struct iwl_trans *trans)
3620 {
3621         struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
3622         unsigned long timeout = jiffies + IWL_TRANS_NMI_TIMEOUT;
3623         bool interrupts_enabled = test_bit(STATUS_INT_ENABLED, &trans->status);
3624         u32 inta_addr, sw_err_bit;
3625
3626         if (trans_pcie->msix_enabled) {
3627                 inta_addr = CSR_MSIX_HW_INT_CAUSES_AD;
3628                 sw_err_bit = MSIX_HW_INT_CAUSES_REG_SW_ERR;
3629         } else {
3630                 inta_addr = CSR_INT;
3631                 sw_err_bit = CSR_INT_BIT_SW_ERR;
3632         }
3633
3634         /* if the interrupts were already disabled, there is no point in
3635          * calling iwl_disable_interrupts
3636          */
3637         if (interrupts_enabled)
3638                 iwl_disable_interrupts(trans);
3639
3640         iwl_force_nmi(trans);
3641         while (time_after(timeout, jiffies)) {
3642                 u32 inta_hw = iwl_read32(trans, inta_addr);
3643
3644                 /* Error detected by uCode */
3645                 if (inta_hw & sw_err_bit) {
3646                         /* Clear causes register */
3647                         iwl_write32(trans, inta_addr, inta_hw & sw_err_bit);
3648                         break;
3649                 }
3650
3651                 mdelay(1);
3652         }
3653
3654         /* enable interrupts only if there were already enabled before this
3655          * function to avoid a case were the driver enable interrupts before
3656          * proper configurations were made
3657          */
3658         if (interrupts_enabled)
3659                 iwl_enable_interrupts(trans);
3660
3661         iwl_trans_fw_error(trans);
3662 }