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

   1 /******************************************************************************
   2  *
   3  * This file is provided under a dual BSD/GPLv2 license.  When using or
   4  * redistributing this file, you may do so under either license.
   5  *
   6  * GPL LICENSE SUMMARY
   7  *
   8  * Copyright(c) 2007 - 2014 Intel Corporation. All rights reserved.
   9  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of version 2 of the GNU General Public License as
  13  * published by the Free Software Foundation.
  14  *
  15  * This program is distributed in the hope that it will be useful, but
  16  * WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18  * General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  23  * USA
  24  *
  25  * The full GNU General Public License is included in this distribution
  26  * in the file called COPYING.
  27  *
  28  * Contact Information:
  29  *  Intel Linux Wireless <ilw@linux.intel.com>
  30  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  31  *
  32  * BSD LICENSE
  33  *
  34  * Copyright(c) 2005 - 2014 Intel Corporation. All rights reserved.
  35  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
  36  * All rights reserved.
  37  *
  38  * Redistribution and use in source and binary forms, with or without
  39  * modification, are permitted provided that the following conditions
  40  * are met:
  41  *
  42  *  * Redistributions of source code must retain the above copyright
  43  *    notice, this list of conditions and the following disclaimer.
  44  *  * Redistributions in binary form must reproduce the above copyright
  45  *    notice, this list of conditions and the following disclaimer in
  46  *    the documentation and/or other materials provided with the
  47  *    distribution.
  48  *  * Neither the name Intel Corporation nor the names of its
  49  *    contributors may be used to endorse or promote products derived
  50  *    from this software without specific prior written permission.
  51  *
  52  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  53  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  54  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  55  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  56  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  57  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  58  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  59  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  60  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  61  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  62  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  63  *
  64  *****************************************************************************/
  65 #include <linux/pci.h>
  66 #include <linux/pci-aspm.h>
  67 #include <linux/interrupt.h>
  68 #include <linux/debugfs.h>
  69 #include <linux/sched.h>
  70 #include <linux/bitops.h>
  71 #include <linux/gfp.h>
  72 #include <linux/vmalloc.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-agn-hw.h"
  79 #include "iwl-fw-error-dump.h"
  80 #include "internal.h"
  81 #include "iwl-fh.h"
  82
  83 /* extended range in FW SRAM */
  84 #define IWL_FW_MEM_EXTENDED_START       0x40000
  85 #define IWL_FW_MEM_EXTENDED_END         0x57FFF
  86
  87 static void iwl_pcie_free_fw_monitor(struct iwl_trans *trans)
  88 {
  89         struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
  90
  91         if (!trans_pcie->fw_mon_page)
  92                 return;
  93
  94         dma_unmap_page(trans->dev, trans_pcie->fw_mon_phys,
  95                        trans_pcie->fw_mon_size, DMA_FROM_DEVICE);
  96         __free_pages(trans_pcie->fw_mon_page,
  97                      get_order(trans_pcie->fw_mon_size));
  98         trans_pcie->fw_mon_page = NULL;
  99         trans_pcie->fw_mon_phys = 0;
 100         trans_pcie->fw_mon_size = 0;
 101 }
 102
 103 static void iwl_pcie_alloc_fw_monitor(struct iwl_trans *trans)
 104 {
 105         struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
 106         struct page *page;
 107         dma_addr_t phys;
 108         u32 size;
 109         u8 power;
 110
 111         if (trans_pcie->fw_mon_page) {
 112                 dma_sync_single_for_device(trans->dev, trans_pcie->fw_mon_phys,
 113                                            trans_pcie->fw_mon_size,
 114                                            DMA_FROM_DEVICE);
 115                 return;
 116         }
 117
 118         phys = 0;
 119         for (power = 26; power >= 11; power--) {
 120                 int order;
 121
 122                 size = BIT(power);
 123                 order = get_order(size);
 124                 page = alloc_pages(__GFP_COMP | __GFP_NOWARN | __GFP_ZERO,
 125                                    order);
 126                 if (!page)
 127                         continue;
 128
 129                 phys = dma_map_page(trans->dev, page, 0, PAGE_SIZE << order,
 130                                     DMA_FROM_DEVICE);
 131                 if (dma_mapping_error(trans->dev, phys)) {
 132                         __free_pages(page, order);
 133                         continue;
 134                 }
 135                 IWL_INFO(trans,
 136                          "Allocated 0x%08x bytes (order %d) for firmware monitor.\n",
 137                          size, order);
 138                 break;
 139         }
 140
 141         if (WARN_ON_ONCE(!page))
 142                 return;
 143
 144         trans_pcie->fw_mon_page = page;
 145         trans_pcie->fw_mon_phys = phys;
 146         trans_pcie->fw_mon_size = size;
 147 }
 148
 149 static u32 iwl_trans_pcie_read_shr(struct iwl_trans *trans, u32 reg)
 150 {
 151         iwl_write32(trans, HEEP_CTRL_WRD_PCIEX_CTRL_REG,
 152                     ((reg & 0x0000ffff) | (2 << 28)));
 153         return iwl_read32(trans, HEEP_CTRL_WRD_PCIEX_DATA_REG);
 154 }
 155
 156 static void iwl_trans_pcie_write_shr(struct iwl_trans *trans, u32 reg, u32 val)
 157 {
 158         iwl_write32(trans, HEEP_CTRL_WRD_PCIEX_DATA_REG, val);
 159         iwl_write32(trans, HEEP_CTRL_WRD_PCIEX_CTRL_REG,
 160                     ((reg & 0x0000ffff) | (3 << 28)));
 161 }
 162
 163 static void iwl_pcie_set_pwr(struct iwl_trans *trans, bool vaux)
 164 {
 165         if (vaux && pci_pme_capable(to_pci_dev(trans->dev), PCI_D3cold))
 166                 iwl_set_bits_mask_prph(trans, APMG_PS_CTRL_REG,
 167                                        APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
 168                                        ~APMG_PS_CTRL_MSK_PWR_SRC);
 169         else
 170                 iwl_set_bits_mask_prph(trans, APMG_PS_CTRL_REG,
 171                                        APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
 172                                        ~APMG_PS_CTRL_MSK_PWR_SRC);
 173 }
 174
 175 /* PCI registers */
 176 #define PCI_CFG_RETRY_TIMEOUT   0x041
 177
 178 static void iwl_pcie_apm_config(struct iwl_trans *trans)
 179 {
 180         struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
 181         u16 lctl;
 182         u16 cap;
 183
 184         /*
 185          * HW bug W/A for instability in PCIe bus L0S->L1 transition.
 186          * Check if BIOS (or OS) enabled L1-ASPM on this device.
 187          * If so (likely), disable L0S, so device moves directly L0->L1;
 188          *    costs negligible amount of power savings.
 189          * If not (unlikely), enable L0S, so there is at least some
 190          *    power savings, even without L1.
 191          */
 192         pcie_capability_read_word(trans_pcie->pci_dev, PCI_EXP_LNKCTL, &lctl);
 193         if (lctl & PCI_EXP_LNKCTL_ASPM_L1)
 194                 iwl_set_bit(trans, CSR_GIO_REG, CSR_GIO_REG_VAL_L0S_ENABLED);
 195         else
 196                 iwl_clear_bit(trans, CSR_GIO_REG, CSR_GIO_REG_VAL_L0S_ENABLED);
 197         trans->pm_support = !(lctl & PCI_EXP_LNKCTL_ASPM_L0S);
 198
 199         pcie_capability_read_word(trans_pcie->pci_dev, PCI_EXP_DEVCTL2, &cap);
 200         trans->ltr_enabled = cap & PCI_EXP_DEVCTL2_LTR_EN;
 201         dev_info(trans->dev, "L1 %sabled - LTR %sabled\n",
 202                  (lctl & PCI_EXP_LNKCTL_ASPM_L1) ? "En" : "Dis",
 203                  trans->ltr_enabled ? "En" : "Dis");
 204 }
 205
 206 /*
 207  * Start up NIC's basic functionality after it has been reset
 208  * (e.g. after platform boot, or shutdown via iwl_pcie_apm_stop())
 209  * NOTE:  This does not load uCode nor start the embedded processor
 210  */
 211 static int iwl_pcie_apm_init(struct iwl_trans *trans)
 212 {
 213         int ret = 0;
 214         IWL_DEBUG_INFO(trans, "Init card's basic functions\n");
 215
 216         /*
 217          * Use "set_bit" below rather than "write", to preserve any hardware
 218          * bits already set by default after reset.
 219          */
 220
 221         /* Disable L0S exit timer (platform NMI Work/Around) */
 222         if (trans->cfg->device_family != IWL_DEVICE_FAMILY_8000)
 223                 iwl_set_bit(trans, CSR_GIO_CHICKEN_BITS,
 224                             CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
 225
 226         /*
 227          * Disable L0s without affecting L1;
 228          *  don't wait for ICH L0s (ICH bug W/A)
 229          */
 230         iwl_set_bit(trans, CSR_GIO_CHICKEN_BITS,
 231                     CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
 232
 233         /* Set FH wait threshold to maximum (HW error during stress W/A) */
 234         iwl_set_bit(trans, CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL);
 235
 236         /*
 237          * Enable HAP INTA (interrupt from management bus) to
 238          * wake device's PCI Express link L1a -> L0s
 239          */
 240         iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG,
 241                     CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
 242
 243         iwl_pcie_apm_config(trans);
 244
 245         /* Configure analog phase-lock-loop before activating to D0A */
 246         if (trans->cfg->base_params->pll_cfg_val)
 247                 iwl_set_bit(trans, CSR_ANA_PLL_CFG,
 248                             trans->cfg->base_params->pll_cfg_val);
 249
 250         /*
 251          * Set "initialization complete" bit to move adapter from
 252          * D0U* --> D0A* (powered-up active) state.
 253          */
 254         iwl_set_bit(trans, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
 255
 256         /*
 257          * Wait for clock stabilization; once stabilized, access to
 258          * device-internal resources is supported, e.g. iwl_write_prph()
 259          * and accesses to uCode SRAM.
 260          */
 261         ret = iwl_poll_bit(trans, CSR_GP_CNTRL,
 262                            CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
 263                            CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
 264         if (ret < 0) {
 265                 IWL_DEBUG_INFO(trans, "Failed to init the card\n");
 266                 goto out;
 267         }
 268
 269         if (trans->cfg->host_interrupt_operation_mode) {
 270                 /*
 271                  * This is a bit of an abuse - This is needed for 7260 / 3160
 272                  * only check host_interrupt_operation_mode even if this is
 273                  * not related to host_interrupt_operation_mode.
 274                  *
 275                  * Enable the oscillator to count wake up time for L1 exit. This
 276                  * consumes slightly more power (100uA) - but allows to be sure
 277                  * that we wake up from L1 on time.
 278                  *
 279                  * This looks weird: read twice the same register, discard the
 280                  * value, set a bit, and yet again, read that same register
 281                  * just to discard the value. But that's the way the hardware
 282                  * seems to like it.
 283                  */
 284                 iwl_read_prph(trans, OSC_CLK);
 285                 iwl_read_prph(trans, OSC_CLK);
 286                 iwl_set_bits_prph(trans, OSC_CLK, OSC_CLK_FORCE_CONTROL);
 287                 iwl_read_prph(trans, OSC_CLK);
 288                 iwl_read_prph(trans, OSC_CLK);
 289         }
 290
 291         /*
 292          * Enable DMA clock and wait for it to stabilize.
 293          *
 294          * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0"
 295          * bits do not disable clocks.  This preserves any hardware
 296          * bits already set by default in "CLK_CTRL_REG" after reset.
 297          */
 298         if (trans->cfg->device_family != IWL_DEVICE_FAMILY_8000) {
 299                 iwl_write_prph(trans, APMG_CLK_EN_REG,
 300                                APMG_CLK_VAL_DMA_CLK_RQT);
 301                 udelay(20);
 302
 303                 /* Disable L1-Active */
 304                 iwl_set_bits_prph(trans, APMG_PCIDEV_STT_REG,
 305                                   APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
 306
 307                 /* Clear the interrupt in APMG if the NIC is in RFKILL */
 308                 iwl_write_prph(trans, APMG_RTC_INT_STT_REG,
 309                                APMG_RTC_INT_STT_RFKILL);
 310         }
 311
 312         set_bit(STATUS_DEVICE_ENABLED, &trans->status);
 313
 314 out:
 315         return ret;
 316 }
 317
 318 /*
 319  * Enable LP XTAL to avoid HW bug where device may consume much power if
 320  * FW is not loaded after device reset. LP XTAL is disabled by default
 321  * after device HW reset. Do it only if XTAL is fed by internal source.
 322  * Configure device's "persistence" mode to avoid resetting XTAL again when
 323  * SHRD_HW_RST occurs in S3.
 324  */
 325 static void iwl_pcie_apm_lp_xtal_enable(struct iwl_trans *trans)
 326 {
 327         int ret;
 328         u32 apmg_gp1_reg;
 329         u32 apmg_xtal_cfg_reg;
 330         u32 dl_cfg_reg;
 331
 332         /* Force XTAL ON */
 333         __iwl_trans_pcie_set_bit(trans, CSR_GP_CNTRL,
 334                                  CSR_GP_CNTRL_REG_FLAG_XTAL_ON);
 335
 336         /* Reset entire device - do controller reset (results in SHRD_HW_RST) */
 337         iwl_set_bit(trans, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
 338
 339         udelay(10);
 340
 341         /*
 342          * Set "initialization complete" bit to move adapter from
 343          * D0U* --> D0A* (powered-up active) state.
 344          */
 345         iwl_set_bit(trans, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
 346
 347         /*
 348          * Wait for clock stabilization; once stabilized, access to
 349          * device-internal resources is possible.
 350          */
 351         ret = iwl_poll_bit(trans, CSR_GP_CNTRL,
 352                            CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
 353                            CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
 354                            25000);
 355         if (WARN_ON(ret < 0)) {
 356                 IWL_ERR(trans, "Access time out - failed to enable LP XTAL\n");
 357                 /* Release XTAL ON request */
 358                 __iwl_trans_pcie_clear_bit(trans, CSR_GP_CNTRL,
 359                                            CSR_GP_CNTRL_REG_FLAG_XTAL_ON);
 360                 return;
 361         }
 362
 363         /*
 364          * Clear "disable persistence" to avoid LP XTAL resetting when
 365          * SHRD_HW_RST is applied in S3.
 366          */
 367         iwl_clear_bits_prph(trans, APMG_PCIDEV_STT_REG,
 368                                     APMG_PCIDEV_STT_VAL_PERSIST_DIS);
 369
 370         /*
 371          * Force APMG XTAL to be active to prevent its disabling by HW
 372          * caused by APMG idle state.
 373          */
 374         apmg_xtal_cfg_reg = iwl_trans_pcie_read_shr(trans,
 375                                                     SHR_APMG_XTAL_CFG_REG);
 376         iwl_trans_pcie_write_shr(trans, SHR_APMG_XTAL_CFG_REG,
 377                                  apmg_xtal_cfg_reg |
 378                                  SHR_APMG_XTAL_CFG_XTAL_ON_REQ);
 379
 380         /*
 381          * Reset entire device again - do controller reset (results in
 382          * SHRD_HW_RST). Turn MAC off before proceeding.
 383          */
 384         iwl_set_bit(trans, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
 385
 386         udelay(10);
 387
 388         /* Enable LP XTAL by indirect access through CSR */
 389         apmg_gp1_reg = iwl_trans_pcie_read_shr(trans, SHR_APMG_GP1_REG);
 390         iwl_trans_pcie_write_shr(trans, SHR_APMG_GP1_REG, apmg_gp1_reg |
 391                                  SHR_APMG_GP1_WF_XTAL_LP_EN |
 392                                  SHR_APMG_GP1_CHICKEN_BIT_SELECT);
 393
 394         /* Clear delay line clock power up */
 395         dl_cfg_reg = iwl_trans_pcie_read_shr(trans, SHR_APMG_DL_CFG_REG);
 396         iwl_trans_pcie_write_shr(trans, SHR_APMG_DL_CFG_REG, dl_cfg_reg &
 397                                  ~SHR_APMG_DL_CFG_DL_CLOCK_POWER_UP);
 398
 399         /*
 400          * Enable persistence mode to avoid LP XTAL resetting when
 401          * SHRD_HW_RST is applied in S3.
 402          */
 403         iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG,
 404                     CSR_HW_IF_CONFIG_REG_PERSIST_MODE);
 405
 406         /*
 407          * Clear "initialization complete" bit to move adapter from
 408          * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
 409          */
 410         iwl_clear_bit(trans, CSR_GP_CNTRL,
 411                       CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
 412
 413         /* Activates XTAL resources monitor */
 414         __iwl_trans_pcie_set_bit(trans, CSR_MONITOR_CFG_REG,
 415                                  CSR_MONITOR_XTAL_RESOURCES);
 416
 417         /* Release XTAL ON request */
 418         __iwl_trans_pcie_clear_bit(trans, CSR_GP_CNTRL,
 419                                    CSR_GP_CNTRL_REG_FLAG_XTAL_ON);
 420         udelay(10);
 421
 422         /* Release APMG XTAL */
 423         iwl_trans_pcie_write_shr(trans, SHR_APMG_XTAL_CFG_REG,
 424                                  apmg_xtal_cfg_reg &
 425                                  ~SHR_APMG_XTAL_CFG_XTAL_ON_REQ);
 426 }
 427
 428 static int iwl_pcie_apm_stop_master(struct iwl_trans *trans)
 429 {
 430         int ret = 0;
 431
 432         /* stop device's busmaster DMA activity */
 433         iwl_set_bit(trans, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
 434
 435         ret = iwl_poll_bit(trans, CSR_RESET,
 436                            CSR_RESET_REG_FLAG_MASTER_DISABLED,
 437                            CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
 438         if (ret < 0)
 439                 IWL_WARN(trans, "Master Disable Timed Out, 100 usec\n");
 440
 441         IWL_DEBUG_INFO(trans, "stop master\n");
 442
 443         return ret;
 444 }
 445
 446 static void iwl_pcie_apm_stop(struct iwl_trans *trans)
 447 {
 448         IWL_DEBUG_INFO(trans, "Stop card, put in low power state\n");
 449
 450         clear_bit(STATUS_DEVICE_ENABLED, &trans->status);
 451
 452         /* Stop device's DMA activity */
 453         iwl_pcie_apm_stop_master(trans);
 454
 455         if (trans->cfg->lp_xtal_workaround) {
 456                 iwl_pcie_apm_lp_xtal_enable(trans);
 457                 return;
 458         }
 459
 460         /* Reset the entire device */
 461         iwl_set_bit(trans, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
 462
 463         udelay(10);
 464
 465         /*
 466          * Clear "initialization complete" bit to move adapter from
 467          * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
 468          */
 469         iwl_clear_bit(trans, CSR_GP_CNTRL,
 470                       CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
 471 }
 472
 473 static int iwl_pcie_nic_init(struct iwl_trans *trans)
 474 {
 475         struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
 476
 477         /* nic_init */
 478         spin_lock(&trans_pcie->irq_lock);
 479         iwl_pcie_apm_init(trans);
 480
 481         spin_unlock(&trans_pcie->irq_lock);
 482
 483         if (trans->cfg->device_family != IWL_DEVICE_FAMILY_8000)
 484                 iwl_pcie_set_pwr(trans, false);
 485
 486         iwl_op_mode_nic_config(trans->op_mode);
 487
 488         /* Allocate the RX queue, or reset if it is already allocated */
 489         iwl_pcie_rx_init(trans);
 490
 491         /* Allocate or reset and init all Tx and Command queues */
 492         if (iwl_pcie_tx_init(trans))
 493                 return -ENOMEM;
 494
 495         if (trans->cfg->base_params->shadow_reg_enable) {
 496                 /* enable shadow regs in HW */
 497                 iwl_set_bit(trans, CSR_MAC_SHADOW_REG_CTRL, 0x800FFFFF);
 498                 IWL_DEBUG_INFO(trans, "Enabling shadow registers in device\n");
 499         }
 500
 501         return 0;
 502 }
 503
 504 #define HW_READY_TIMEOUT (50)
 505
 506 /* Note: returns poll_bit return value, which is >= 0 if success */
 507 static int iwl_pcie_set_hw_ready(struct iwl_trans *trans)
 508 {
 509         int ret;
 510
 511         iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG,
 512                     CSR_HW_IF_CONFIG_REG_BIT_NIC_READY);
 513
 514         /* See if we got it */
 515         ret = iwl_poll_bit(trans, CSR_HW_IF_CONFIG_REG,
 516                            CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
 517                            CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
 518                            HW_READY_TIMEOUT);
 519
 520         if (ret >= 0)
 521                 iwl_set_bit(trans, CSR_MBOX_SET_REG, CSR_MBOX_SET_REG_OS_ALIVE);
 522
 523         IWL_DEBUG_INFO(trans, "hardware%s ready\n", ret < 0 ? " not" : "");
 524         return ret;
 525 }
 526
 527 /* Note: returns standard 0/-ERROR code */
 528 static int iwl_pcie_prepare_card_hw(struct iwl_trans *trans)
 529 {
 530         int ret;
 531         int t = 0;
 532         int iter;
 533
 534         IWL_DEBUG_INFO(trans, "iwl_trans_prepare_card_hw enter\n");
 535
 536         ret = iwl_pcie_set_hw_ready(trans);
 537         /* If the card is ready, exit 0 */
 538         if (ret >= 0)
 539                 return 0;
 540
 541         for (iter = 0; iter < 10; iter++) {
 542                 /* If HW is not ready, prepare the conditions to check again */
 543                 iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG,
 544                             CSR_HW_IF_CONFIG_REG_PREPARE);
 545
 546                 do {
 547                         ret = iwl_pcie_set_hw_ready(trans);
 548                         if (ret >= 0)
 549                                 return 0;
 550
 551                         usleep_range(200, 1000);
 552                         t += 200;
 553                 } while (t < 150000);
 554                 msleep(25);
 555         }
 556
 557         IWL_ERR(trans, "Couldn't prepare the card\n");
 558
 559         return ret;
 560 }
 561
 562 /*
 563  * ucode
 564  */
 565 static int iwl_pcie_load_firmware_chunk(struct iwl_trans *trans, u32 dst_addr,
 566                                    dma_addr_t phy_addr, u32 byte_cnt)
 567 {
 568         struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
 569         int ret;
 570
 571         trans_pcie->ucode_write_complete = false;
 572
 573         iwl_write_direct32(trans,
 574                            FH_TCSR_CHNL_TX_CONFIG_REG(FH_SRVC_CHNL),
 575                            FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_PAUSE);
 576
 577         iwl_write_direct32(trans,
 578                            FH_SRVC_CHNL_SRAM_ADDR_REG(FH_SRVC_CHNL),
 579                            dst_addr);
 580
 581         iwl_write_direct32(trans,
 582                            FH_TFDIB_CTRL0_REG(FH_SRVC_CHNL),
 583                            phy_addr & FH_MEM_TFDIB_DRAM_ADDR_LSB_MSK);
 584
 585         iwl_write_direct32(trans,
 586                            FH_TFDIB_CTRL1_REG(FH_SRVC_CHNL),
 587                            (iwl_get_dma_hi_addr(phy_addr)
 588                                 << FH_MEM_TFDIB_REG1_ADDR_BITSHIFT) | byte_cnt);
 589
 590         iwl_write_direct32(trans,
 591                            FH_TCSR_CHNL_TX_BUF_STS_REG(FH_SRVC_CHNL),
 592                            1 << FH_TCSR_CHNL_TX_BUF_STS_REG_POS_TB_NUM |
 593                            1 << FH_TCSR_CHNL_TX_BUF_STS_REG_POS_TB_IDX |
 594                            FH_TCSR_CHNL_TX_BUF_STS_REG_VAL_TFDB_VALID);
 595
 596         iwl_write_direct32(trans,
 597                            FH_TCSR_CHNL_TX_CONFIG_REG(FH_SRVC_CHNL),
 598                            FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE    |
 599                            FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_DISABLE |
 600                            FH_TCSR_TX_CONFIG_REG_VAL_CIRQ_HOST_ENDTFD);
 601
 602         ret = wait_event_timeout(trans_pcie->ucode_write_waitq,
 603                                  trans_pcie->ucode_write_complete, 5 * HZ);
 604         if (!ret) {
 605                 IWL_ERR(trans, "Failed to load firmware chunk!\n");
 606                 return -ETIMEDOUT;
 607         }
 608
 609         return 0;
 610 }
 611
 612 static int iwl_pcie_load_section(struct iwl_trans *trans, u8 section_num,
 613                             const struct fw_desc *section)
 614 {
 615         u8 *v_addr;
 616         dma_addr_t p_addr;
 617         u32 offset, chunk_sz = section->len;
 618         int ret = 0;
 619
 620         IWL_DEBUG_FW(trans, "[%d] uCode section being loaded...\n",
 621                      section_num);
 622
 623         v_addr = dma_alloc_coherent(trans->dev, chunk_sz, &p_addr,
 624                                     GFP_KERNEL | __GFP_NOWARN);
 625         if (!v_addr) {
 626                 IWL_DEBUG_INFO(trans, "Falling back to small chunks of DMA\n");
 627                 chunk_sz = PAGE_SIZE;
 628                 v_addr = dma_alloc_coherent(trans->dev, chunk_sz,
 629                                             &p_addr, GFP_KERNEL);
 630                 if (!v_addr)
 631                         return -ENOMEM;
 632         }
 633
 634         for (offset = 0; offset < section->len; offset += chunk_sz) {
 635                 u32 copy_size, dst_addr;
 636                 bool extended_addr = false;
 637
 638                 copy_size = min_t(u32, chunk_sz, section->len - offset);
 639                 dst_addr = section->offset + offset;
 640
 641                 if (dst_addr >= IWL_FW_MEM_EXTENDED_START &&
 642                     dst_addr <= IWL_FW_MEM_EXTENDED_END)
 643                         extended_addr = true;
 644
 645                 if (extended_addr)
 646                         iwl_set_bits_prph(trans, LMPM_CHICK,
 647                                           LMPM_CHICK_EXTENDED_ADDR_SPACE);
 648
 649                 memcpy(v_addr, (u8 *)section->data + offset, copy_size);
 650                 ret = iwl_pcie_load_firmware_chunk(trans, dst_addr, p_addr,
 651                                                    copy_size);
 652
 653                 if (extended_addr)
 654                         iwl_clear_bits_prph(trans, LMPM_CHICK,
 655                                             LMPM_CHICK_EXTENDED_ADDR_SPACE);
 656
 657                 if (ret) {
 658                         IWL_ERR(trans,
 659                                 "Could not load the [%d] uCode section\n",
 660                                 section_num);
 661                         break;
 662                 }
 663         }
 664
 665         dma_free_coherent(trans->dev, chunk_sz, v_addr, p_addr);
 666         return ret;
 667 }
 668
 669 static int iwl_pcie_load_cpu_sections_8000b(struct iwl_trans *trans,
 670                                             const struct fw_img *image,
 671                                             int cpu,
 672                                             int *first_ucode_section)
 673 {
 674         int shift_param;
 675         int i, ret = 0, sec_num = 0x1;
 676         u32 val, last_read_idx = 0;
 677
 678         if (cpu == 1) {
 679                 shift_param = 0;
 680                 *first_ucode_section = 0;
 681         } else {
 682                 shift_param = 16;
 683                 (*first_ucode_section)++;
 684         }
 685
 686         for (i = *first_ucode_section; i < IWL_UCODE_SECTION_MAX; i++) {
 687                 last_read_idx = i;
 688
 689                 if (!image->sec[i].data ||
 690                     image->sec[i].offset == CPU1_CPU2_SEPARATOR_SECTION) {
 691                         IWL_DEBUG_FW(trans,
 692                                      "Break since Data not valid or Empty section, sec = %d\n",
 693                                      i);
 694                         break;
 695                 }
 696
 697                 ret = iwl_pcie_load_section(trans, i, &image->sec[i]);
 698                 if (ret)
 699                         return ret;
 700
 701                 /* Notify the ucode of the loaded section number and status */
 702                 val = iwl_read_direct32(trans, FH_UCODE_LOAD_STATUS);
 703                 val = val | (sec_num << shift_param);
 704                 iwl_write_direct32(trans, FH_UCODE_LOAD_STATUS, val);
 705                 sec_num = (sec_num << 1) | 0x1;
 706         }
 707
 708         *first_ucode_section = last_read_idx;
 709
 710         return 0;
 711 }
 712
 713 static int iwl_pcie_load_cpu_sections(struct iwl_trans *trans,
 714                                       const struct fw_img *image,
 715                                       int cpu,
 716                                       int *first_ucode_section)
 717 {
 718         int shift_param;
 719         int i, ret = 0;
 720         u32 last_read_idx = 0;
 721
 722         if (cpu == 1) {
 723                 shift_param = 0;
 724                 *first_ucode_section = 0;
 725         } else {
 726                 shift_param = 16;
 727                 (*first_ucode_section)++;
 728         }
 729
 730         for (i = *first_ucode_section; i < IWL_UCODE_SECTION_MAX; i++) {
 731                 last_read_idx = i;
 732
 733                 if (!image->sec[i].data ||
 734                     image->sec[i].offset == CPU1_CPU2_SEPARATOR_SECTION) {
 735                         IWL_DEBUG_FW(trans,
 736                                      "Break since Data not valid or Empty section, sec = %d\n",
 737                                      i);
 738                         break;
 739                 }
 740
 741                 ret = iwl_pcie_load_section(trans, i, &image->sec[i]);
 742                 if (ret)
 743                         return ret;
 744         }
 745
 746         if (trans->cfg->device_family == IWL_DEVICE_FAMILY_8000)
 747                 iwl_set_bits_prph(trans,
 748                                   CSR_UCODE_LOAD_STATUS_ADDR,
 749                                   (LMPM_CPU_UCODE_LOADING_COMPLETED |
 750                                    LMPM_CPU_HDRS_LOADING_COMPLETED |
 751                                    LMPM_CPU_UCODE_LOADING_STARTED) <<
 752                                         shift_param);
 753
 754         *first_ucode_section = last_read_idx;
 755
 756         return 0;
 757 }
 758
 759 static void iwl_pcie_apply_destination(struct iwl_trans *trans)
 760 {
 761         struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
 762         const struct iwl_fw_dbg_dest_tlv *dest = trans->dbg_dest_tlv;
 763         int i;
 764
 765         if (dest->version)
 766                 IWL_ERR(trans,
 767                         "DBG DEST version is %d - expect issues\n",
 768                         dest->version);
 769
 770         IWL_INFO(trans, "Applying debug destination %s\n",
 771                  get_fw_dbg_mode_string(dest->monitor_mode));
 772
 773         if (dest->monitor_mode == EXTERNAL_MODE)
 774                 iwl_pcie_alloc_fw_monitor(trans);
 775         else
 776                 IWL_WARN(trans, "PCI should have external buffer debug\n");
 777
 778         for (i = 0; i < trans->dbg_dest_reg_num; i++) {
 779                 u32 addr = le32_to_cpu(dest->reg_ops[i].addr);
 780                 u32 val = le32_to_cpu(dest->reg_ops[i].val);
 781
 782                 switch (dest->reg_ops[i].op) {
 783                 case CSR_ASSIGN:
 784                         iwl_write32(trans, addr, val);
 785                         break;
 786                 case CSR_SETBIT:
 787                         iwl_set_bit(trans, addr, BIT(val));
 788                         break;
 789                 case CSR_CLEARBIT:
 790                         iwl_clear_bit(trans, addr, BIT(val));
 791                         break;
 792                 case PRPH_ASSIGN:
 793                         iwl_write_prph(trans, addr, val);
 794                         break;
 795                 case PRPH_SETBIT:
 796                         iwl_set_bits_prph(trans, addr, BIT(val));
 797                         break;
 798                 case PRPH_CLEARBIT:
 799                         iwl_clear_bits_prph(trans, addr, BIT(val));
 800                         break;
 801                 default:
 802                         IWL_ERR(trans, "FW debug - unknown OP %d\n",
 803                                 dest->reg_ops[i].op);
 804                         break;
 805                 }
 806         }
 807
 808         if (dest->monitor_mode == EXTERNAL_MODE && trans_pcie->fw_mon_size) {
 809                 iwl_write_prph(trans, le32_to_cpu(dest->base_reg),
 810                                trans_pcie->fw_mon_phys >> dest->base_shift);
 811                 iwl_write_prph(trans, le32_to_cpu(dest->end_reg),
 812                                (trans_pcie->fw_mon_phys +
 813                                 trans_pcie->fw_mon_size) >> dest->end_shift);
 814         }
 815 }
 816
 817 static int iwl_pcie_load_given_ucode(struct iwl_trans *trans,
 818                                 const struct fw_img *image)
 819 {
 820         struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
 821         int ret = 0;
 822         int first_ucode_section;
 823
 824         IWL_DEBUG_FW(trans, "working with %s CPU\n",
 825                      image->is_dual_cpus ? "Dual" : "Single");
 826
 827         /* load to FW the binary non secured sections of CPU1 */
 828         ret = iwl_pcie_load_cpu_sections(trans, image, 1, &first_ucode_section);
 829         if (ret)
 830                 return ret;
 831
 832         if (image->is_dual_cpus) {
 833                 /* set CPU2 header address */
 834                 iwl_write_prph(trans,
 835                                LMPM_SECURE_UCODE_LOAD_CPU2_HDR_ADDR,
 836                                LMPM_SECURE_CPU2_HDR_MEM_SPACE);
 837
 838                 /* load to FW the binary sections of CPU2 */
 839                 ret = iwl_pcie_load_cpu_sections(trans, image, 2,
 840                                                  &first_ucode_section);
 841                 if (ret)
 842                         return ret;
 843         }
 844
 845         /* supported for 7000 only for the moment */
 846         if (iwlwifi_mod_params.fw_monitor &&
 847             trans->cfg->device_family == IWL_DEVICE_FAMILY_7000) {
 848                 iwl_pcie_alloc_fw_monitor(trans);
 849
 850                 if (trans_pcie->fw_mon_size) {
 851                         iwl_write_prph(trans, MON_BUFF_BASE_ADDR,
 852                                        trans_pcie->fw_mon_phys >> 4);
 853                         iwl_write_prph(trans, MON_BUFF_END_ADDR,
 854                                        (trans_pcie->fw_mon_phys +
 855                                         trans_pcie->fw_mon_size) >> 4);
 856                 }
 857         } else if (trans->dbg_dest_tlv) {
 858                 iwl_pcie_apply_destination(trans);
 859         }
 860
 861         /* release CPU reset */
 862         if (trans->cfg->device_family == IWL_DEVICE_FAMILY_8000)
 863                 iwl_write_prph(trans, RELEASE_CPU_RESET, RELEASE_CPU_RESET_BIT);
 864         else
 865                 iwl_write32(trans, CSR_RESET, 0);
 866
 867         return 0;
 868 }
 869
 870 static int iwl_pcie_load_given_ucode_8000b(struct iwl_trans *trans,
 871                                            const struct fw_img *image)
 872 {
 873         int ret = 0;
 874         int first_ucode_section;
 875         u32 reg;
 876
 877         IWL_DEBUG_FW(trans, "working with %s CPU\n",
 878                      image->is_dual_cpus ? "Dual" : "Single");
 879
 880         /* configure the ucode to be ready to get the secured image */
 881         /* release CPU reset */
 882         iwl_write_prph(trans, RELEASE_CPU_RESET, RELEASE_CPU_RESET_BIT);
 883
 884         /* load to FW the binary Secured sections of CPU1 */
 885         ret = iwl_pcie_load_cpu_sections_8000b(trans, image, 1,
 886                                                &first_ucode_section);
 887         if (ret)
 888                 return ret;
 889
 890         /* load to FW the binary sections of CPU2 */
 891         ret = iwl_pcie_load_cpu_sections_8000b(trans, image, 2,
 892                                                &first_ucode_section);
 893         if (ret)
 894                 return ret;
 895
 896         /* Notify FW loading is done */
 897         iwl_write_direct32(trans, FH_UCODE_LOAD_STATUS, 0xFFFFFFFF);
 898
 899         /* wait for image verification to complete  */
 900         ret = iwl_poll_prph_bit(trans, LMPM_SECURE_BOOT_CPU1_STATUS_ADDR_B0,
 901                                 LMPM_SECURE_BOOT_STATUS_SUCCESS,
 902                                 LMPM_SECURE_BOOT_STATUS_SUCCESS,
 903                                 LMPM_SECURE_TIME_OUT);
 904         if (ret < 0) {
 905                 reg = iwl_read_prph(trans,
 906                                     LMPM_SECURE_BOOT_CPU1_STATUS_ADDR_B0);
 907
 908                 IWL_ERR(trans, "Timeout on secure boot process, reg = %x\n",
 909                         reg);
 910                 return ret;
 911         }
 912
 913         return 0;
 914 }
 915
 916 static int iwl_trans_pcie_start_fw(struct iwl_trans *trans,
 917                                    const struct fw_img *fw, bool run_in_rfkill)
 918 {
 919         int ret;
 920         bool hw_rfkill;
 921
 922         /* This may fail if AMT took ownership of the device */
 923         if (iwl_pcie_prepare_card_hw(trans)) {
 924                 IWL_WARN(trans, "Exit HW not ready\n");
 925                 return -EIO;
 926         }
 927
 928         iwl_enable_rfkill_int(trans);
 929
 930         /* If platform's RF_KILL switch is NOT set to KILL */
 931         hw_rfkill = iwl_is_rfkill_set(trans);
 932         if (hw_rfkill)
 933                 set_bit(STATUS_RFKILL, &trans->status);
 934         else
 935                 clear_bit(STATUS_RFKILL, &trans->status);
 936         iwl_trans_pcie_rf_kill(trans, hw_rfkill);
 937         if (hw_rfkill && !run_in_rfkill)
 938                 return -ERFKILL;
 939
 940         iwl_write32(trans, CSR_INT, 0xFFFFFFFF);
 941
 942         ret = iwl_pcie_nic_init(trans);
 943         if (ret) {
 944                 IWL_ERR(trans, "Unable to init nic\n");
 945                 return ret;
 946         }
 947
 948         /* make sure rfkill handshake bits are cleared */
 949         iwl_write32(trans, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
 950         iwl_write32(trans, CSR_UCODE_DRV_GP1_CLR,
 951                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 952
 953         /* clear (again), then enable host interrupts */
 954         iwl_write32(trans, CSR_INT, 0xFFFFFFFF);
 955         iwl_enable_interrupts(trans);
 956
 957         /* really make sure rfkill handshake bits are cleared */
 958         iwl_write32(trans, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
 959         iwl_write32(trans, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
 960
 961         /* Load the given image to the HW */
 962         if ((trans->cfg->device_family == IWL_DEVICE_FAMILY_8000) &&
 963             (CSR_HW_REV_STEP(trans->hw_rev) == SILICON_B_STEP))
 964                 return iwl_pcie_load_given_ucode_8000b(trans, fw);
 965         else
 966                 return iwl_pcie_load_given_ucode(trans, fw);
 967 }
 968
 969 static void iwl_trans_pcie_fw_alive(struct iwl_trans *trans, u32 scd_addr)
 970 {
 971         iwl_pcie_reset_ict(trans);
 972         iwl_pcie_tx_start(trans, scd_addr);
 973 }
 974
 975 static void iwl_trans_pcie_stop_device(struct iwl_trans *trans)
 976 {
 977         struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
 978         bool hw_rfkill, was_hw_rfkill;
 979
 980         was_hw_rfkill = iwl_is_rfkill_set(trans);
 981
 982         /* tell the device to stop sending interrupts */
 983         spin_lock(&trans_pcie->irq_lock);
 984         iwl_disable_interrupts(trans);
 985         spin_unlock(&trans_pcie->irq_lock);
 986
 987         /* device going down, Stop using ICT table */
 988         iwl_pcie_disable_ict(trans);
 989
 990         /*
 991          * If a HW restart happens during firmware loading,
 992          * then the firmware loading might call this function
 993          * and later it might be called again due to the
 994          * restart. So don't process again if the device is
 995          * already dead.
 996          */
 997         if (test_and_clear_bit(STATUS_DEVICE_ENABLED, &trans->status)) {
 998                 IWL_DEBUG_INFO(trans, "DEVICE_ENABLED bit was set and is now cleared\n");
 999                 iwl_pcie_tx_stop(trans);
1000                 iwl_pcie_rx_stop(trans);
1001
1002                 /* Power-down device's busmaster DMA clocks */
1003                 iwl_write_prph(trans, APMG_CLK_DIS_REG,
1004                                APMG_CLK_VAL_DMA_CLK_RQT);
1005                 udelay(5);
1006         }
1007
1008         /* Make sure (redundant) we've released our request to stay awake */
1009         iwl_clear_bit(trans, CSR_GP_CNTRL,
1010                       CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
1011
1012         /* Stop the device, and put it in low power state */
1013         iwl_pcie_apm_stop(trans);
1014
1015         /* Upon stop, the APM issues an interrupt if HW RF kill is set.
1016          * Clean again the interrupt here
1017          */
1018         spin_lock(&trans_pcie->irq_lock);
1019         iwl_disable_interrupts(trans);
1020         spin_unlock(&trans_pcie->irq_lock);
1021
1022         /* stop and reset the on-board processor */
1023         iwl_write32(trans, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
1024         udelay(20);
1025
1026         /* clear all status bits */
1027         clear_bit(STATUS_SYNC_HCMD_ACTIVE, &trans->status);
1028         clear_bit(STATUS_INT_ENABLED, &trans->status);
1029         clear_bit(STATUS_TPOWER_PMI, &trans->status);
1030         clear_bit(STATUS_RFKILL, &trans->status);
1031
1032         /*
1033          * Even if we stop the HW, we still want the RF kill
1034          * interrupt
1035          */
1036         iwl_enable_rfkill_int(trans);
1037
1038         /*
1039          * Check again since the RF kill state may have changed while
1040          * all the interrupts were disabled, in this case we couldn't
1041          * receive the RF kill interrupt and update the state in the
1042          * op_mode.
1043          * Don't call the op_mode if the rkfill state hasn't changed.
1044          * This allows the op_mode to call stop_device from the rfkill
1045          * notification without endless recursion. Under very rare
1046          * circumstances, we might have a small recursion if the rfkill
1047          * state changed exactly now while we were called from stop_device.
1048          * This is very unlikely but can happen and is supported.
1049          */
1050         hw_rfkill = iwl_is_rfkill_set(trans);
1051         if (hw_rfkill)
1052                 set_bit(STATUS_RFKILL, &trans->status);
1053         else
1054                 clear_bit(STATUS_RFKILL, &trans->status);
1055         if (hw_rfkill != was_hw_rfkill)
1056                 iwl_trans_pcie_rf_kill(trans, hw_rfkill);
1057
1058         /* re-take ownership to prevent other users from stealing the deivce */
1059         iwl_pcie_prepare_card_hw(trans);
1060 }
1061
1062 void iwl_trans_pcie_rf_kill(struct iwl_trans *trans, bool state)
1063 {
1064         if (iwl_op_mode_hw_rf_kill(trans->op_mode, state))
1065                 iwl_trans_pcie_stop_device(trans);
1066 }
1067
1068 static void iwl_trans_pcie_d3_suspend(struct iwl_trans *trans, bool test)
1069 {
1070         iwl_disable_interrupts(trans);
1071
1072         /*
1073          * in testing mode, the host stays awake and the
1074          * hardware won't be reset (not even partially)
1075          */
1076         if (test)
1077                 return;
1078
1079         iwl_pcie_disable_ict(trans);
1080
1081         iwl_clear_bit(trans, CSR_GP_CNTRL,
1082                       CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
1083         iwl_clear_bit(trans, CSR_GP_CNTRL,
1084                       CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1085
1086         /*
1087          * reset TX queues -- some of their registers reset during S3
1088          * so if we don't reset everything here the D3 image would try
1089          * to execute some invalid memory upon resume
1090          */
1091         iwl_trans_pcie_tx_reset(trans);
1092
1093         iwl_pcie_set_pwr(trans, true);
1094 }
1095
1096 static int iwl_trans_pcie_d3_resume(struct iwl_trans *trans,
1097                                     enum iwl_d3_status *status,
1098                                     bool test)
1099 {
1100         u32 val;
1101         int ret;
1102
1103         if (test) {
1104                 iwl_enable_interrupts(trans);
1105                 *status = IWL_D3_STATUS_ALIVE;
1106                 return 0;
1107         }
1108
1109         /*
1110          * Also enables interrupts - none will happen as the device doesn't
1111          * know we're waking it up, only when the opmode actually tells it
1112          * after this call.
1113          */
1114         iwl_pcie_reset_ict(trans);
1115
1116         iwl_set_bit(trans, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
1117         iwl_set_bit(trans, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1118
1119         if (trans->cfg->device_family == IWL_DEVICE_FAMILY_8000)
1120                 udelay(2);
1121
1122         ret = iwl_poll_bit(trans, CSR_GP_CNTRL,
1123                            CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
1124                            CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
1125                            25000);
1126         if (ret < 0) {
1127                 IWL_ERR(trans, "Failed to resume the device (mac ready)\n");
1128                 return ret;
1129         }
1130
1131         iwl_pcie_set_pwr(trans, false);
1132
1133         iwl_trans_pcie_tx_reset(trans);
1134
1135         ret = iwl_pcie_rx_init(trans);
1136         if (ret) {
1137                 IWL_ERR(trans, "Failed to resume the device (RX reset)\n");
1138                 return ret;
1139         }
1140
1141         val = iwl_read32(trans, CSR_RESET);
1142         if (val & CSR_RESET_REG_FLAG_NEVO_RESET)
1143                 *status = IWL_D3_STATUS_RESET;
1144         else
1145                 *status = IWL_D3_STATUS_ALIVE;
1146
1147         return 0;
1148 }
1149
1150 static int iwl_trans_pcie_start_hw(struct iwl_trans *trans)
1151 {
1152         bool hw_rfkill;
1153         int err;
1154
1155         err = iwl_pcie_prepare_card_hw(trans);
1156         if (err) {
1157                 IWL_ERR(trans, "Error while preparing HW: %d\n", err);
1158                 return err;
1159         }
1160
1161         /* Reset the entire device */
1162         iwl_write32(trans, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
1163
1164         usleep_range(10, 15);
1165
1166         iwl_pcie_apm_init(trans);
1167
1168         /* From now on, the op_mode will be kept updated about RF kill state */
1169         iwl_enable_rfkill_int(trans);
1170
1171         hw_rfkill = iwl_is_rfkill_set(trans);
1172         if (hw_rfkill)
1173                 set_bit(STATUS_RFKILL, &trans->status);
1174         else
1175                 clear_bit(STATUS_RFKILL, &trans->status);
1176         iwl_trans_pcie_rf_kill(trans, hw_rfkill);
1177
1178         return 0;
1179 }
1180
1181 static void iwl_trans_pcie_op_mode_leave(struct iwl_trans *trans)
1182 {
1183         struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1184
1185         /* disable interrupts - don't enable HW RF kill interrupt */
1186         spin_lock(&trans_pcie->irq_lock);
1187         iwl_disable_interrupts(trans);
1188         spin_unlock(&trans_pcie->irq_lock);
1189
1190         iwl_pcie_apm_stop(trans);
1191
1192         spin_lock(&trans_pcie->irq_lock);
1193         iwl_disable_interrupts(trans);
1194         spin_unlock(&trans_pcie->irq_lock);
1195
1196         iwl_pcie_disable_ict(trans);
1197 }
1198
1199 static void iwl_trans_pcie_write8(struct iwl_trans *trans, u32 ofs, u8 val)
1200 {
1201         writeb(val, IWL_TRANS_GET_PCIE_TRANS(trans)->hw_base + ofs);
1202 }
1203
1204 static void iwl_trans_pcie_write32(struct iwl_trans *trans, u32 ofs, u32 val)
1205 {
1206         writel(val, IWL_TRANS_GET_PCIE_TRANS(trans)->hw_base + ofs);
1207 }
1208
1209 static u32 iwl_trans_pcie_read32(struct iwl_trans *trans, u32 ofs)
1210 {
1211         return readl(IWL_TRANS_GET_PCIE_TRANS(trans)->hw_base + ofs);
1212 }
1213
1214 static u32 iwl_trans_pcie_read_prph(struct iwl_trans *trans, u32 reg)
1215 {
1216         iwl_trans_pcie_write32(trans, HBUS_TARG_PRPH_RADDR,
1217                                ((reg & 0x000FFFFF) | (3 << 24)));
1218         return iwl_trans_pcie_read32(trans, HBUS_TARG_PRPH_RDAT);
1219 }
1220
1221 static void iwl_trans_pcie_write_prph(struct iwl_trans *trans, u32 addr,
1222                                       u32 val)
1223 {
1224         iwl_trans_pcie_write32(trans, HBUS_TARG_PRPH_WADDR,
1225                                ((addr & 0x000FFFFF) | (3 << 24)));
1226         iwl_trans_pcie_write32(trans, HBUS_TARG_PRPH_WDAT, val);
1227 }
1228
1229 static int iwl_pcie_dummy_napi_poll(struct napi_struct *napi, int budget)
1230 {
1231         WARN_ON(1);
1232         return 0;
1233 }
1234
1235 static void iwl_trans_pcie_configure(struct iwl_trans *trans,
1236                                      const struct iwl_trans_config *trans_cfg)
1237 {
1238         struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1239
1240         trans_pcie->cmd_queue = trans_cfg->cmd_queue;
1241         trans_pcie->cmd_fifo = trans_cfg->cmd_fifo;
1242         if (WARN_ON(trans_cfg->n_no_reclaim_cmds > MAX_NO_RECLAIM_CMDS))
1243                 trans_pcie->n_no_reclaim_cmds = 0;
1244         else
1245                 trans_pcie->n_no_reclaim_cmds = trans_cfg->n_no_reclaim_cmds;
1246         if (trans_pcie->n_no_reclaim_cmds)
1247                 memcpy(trans_pcie->no_reclaim_cmds, trans_cfg->no_reclaim_cmds,
1248                        trans_pcie->n_no_reclaim_cmds * sizeof(u8));
1249
1250         trans_pcie->rx_buf_size_8k = trans_cfg->rx_buf_size_8k;
1251         if (trans_pcie->rx_buf_size_8k)
1252                 trans_pcie->rx_page_order = get_order(8 * 1024);
1253         else
1254                 trans_pcie->rx_page_order = get_order(4 * 1024);
1255
1256         trans_pcie->wd_timeout =
1257                 msecs_to_jiffies(trans_cfg->queue_watchdog_timeout);
1258
1259         trans_pcie->command_names = trans_cfg->command_names;
1260         trans_pcie->bc_table_dword = trans_cfg->bc_table_dword;
1261         trans_pcie->scd_set_active = trans_cfg->scd_set_active;
1262
1263         /* Initialize NAPI here - it should be before registering to mac80211
1264          * in the opmode but after the HW struct is allocated.
1265          * As this function may be called again in some corner cases don't
1266          * do anything if NAPI was already initialized.
1267          */
1268         if (!trans_pcie->napi.poll && trans->op_mode->ops->napi_add) {
1269                 init_dummy_netdev(&trans_pcie->napi_dev);
1270                 iwl_op_mode_napi_add(trans->op_mode, &trans_pcie->napi,
1271                                      &trans_pcie->napi_dev,
1272                                      iwl_pcie_dummy_napi_poll, 64);
1273         }
1274 }
1275
1276 void iwl_trans_pcie_free(struct iwl_trans *trans)
1277 {
1278         struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1279
1280         synchronize_irq(trans_pcie->pci_dev->irq);
1281
1282         iwl_pcie_tx_free(trans);
1283         iwl_pcie_rx_free(trans);
1284
1285         free_irq(trans_pcie->pci_dev->irq, trans);
1286         iwl_pcie_free_ict(trans);
1287
1288         pci_disable_msi(trans_pcie->pci_dev);
1289         iounmap(trans_pcie->hw_base);
1290         pci_release_regions(trans_pcie->pci_dev);
1291         pci_disable_device(trans_pcie->pci_dev);
1292         kmem_cache_destroy(trans->dev_cmd_pool);
1293
1294         if (trans_pcie->napi.poll)
1295                 netif_napi_del(&trans_pcie->napi);
1296
1297         iwl_pcie_free_fw_monitor(trans);
1298
1299         kfree(trans);
1300 }
1301
1302 static void iwl_trans_pcie_set_pmi(struct iwl_trans *trans, bool state)
1303 {
1304         if (state)
1305                 set_bit(STATUS_TPOWER_PMI, &trans->status);
1306         else
1307                 clear_bit(STATUS_TPOWER_PMI, &trans->status);
1308 }
1309
1310 static bool iwl_trans_pcie_grab_nic_access(struct iwl_trans *trans, bool silent,
1311                                                 unsigned long *flags)
1312 {
1313         int ret;
1314         struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1315
1316         spin_lock_irqsave(&trans_pcie->reg_lock, *flags);
1317
1318         if (trans_pcie->cmd_in_flight)
1319                 goto out;
1320
1321         /* this bit wakes up the NIC */
1322         __iwl_trans_pcie_set_bit(trans, CSR_GP_CNTRL,
1323                                  CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
1324         if (trans->cfg->device_family == IWL_DEVICE_FAMILY_8000)
1325                 udelay(2);
1326
1327         /*
1328          * These bits say the device is running, and should keep running for
1329          * at least a short while (at least as long as MAC_ACCESS_REQ stays 1),
1330          * but they do not indicate that embedded SRAM is restored yet;
1331          * 3945 and 4965 have volatile SRAM, and must save/restore contents
1332          * to/from host DRAM when sleeping/waking for power-saving.
1333          * Each direction takes approximately 1/4 millisecond; with this
1334          * overhead, it's a good idea to grab and hold MAC_ACCESS_REQUEST if a
1335          * series of register accesses are expected (e.g. reading Event Log),
1336          * to keep device from sleeping.
1337          *
1338          * CSR_UCODE_DRV_GP1 register bit MAC_SLEEP == 0 indicates that
1339          * SRAM is okay/restored.  We don't check that here because this call
1340          * is just for hardware register access; but GP1 MAC_SLEEP check is a
1341          * good idea before accessing 3945/4965 SRAM (e.g. reading Event Log).
1342          *
1343          * 5000 series and later (including 1000 series) have non-volatile SRAM,
1344          * and do not save/restore SRAM when power cycling.
1345          */
1346         ret = iwl_poll_bit(trans, CSR_GP_CNTRL,
1347                            CSR_GP_CNTRL_REG_VAL_MAC_ACCESS_EN,
1348                            (CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY |
1349                             CSR_GP_CNTRL_REG_FLAG_GOING_TO_SLEEP), 15000);
1350         if (unlikely(ret < 0)) {
1351                 iwl_write32(trans, CSR_RESET, CSR_RESET_REG_FLAG_FORCE_NMI);
1352                 if (!silent) {
1353                         u32 val = iwl_read32(trans, CSR_GP_CNTRL);
1354                         WARN_ONCE(1,
1355                                   "Timeout waiting for hardware access (CSR_GP_CNTRL 0x%08x)\n",
1356                                   val);
1357                         spin_unlock_irqrestore(&trans_pcie->reg_lock, *flags);
1358                         return false;
1359                 }
1360         }
1361
1362 out:
1363         /*
1364          * Fool sparse by faking we release the lock - sparse will
1365          * track nic_access anyway.
1366          */
1367         __release(&trans_pcie->reg_lock);
1368         return true;
1369 }
1370
1371 static void iwl_trans_pcie_release_nic_access(struct iwl_trans *trans,
1372                                               unsigned long *flags)
1373 {
1374         struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1375
1376         lockdep_assert_held(&trans_pcie->reg_lock);
1377
1378         /*
1379          * Fool sparse by faking we acquiring the lock - sparse will
1380          * track nic_access anyway.
1381          */
1382         __acquire(&trans_pcie->reg_lock);
1383
1384         if (trans_pcie->cmd_in_flight)
1385                 goto out;
1386
1387         __iwl_trans_pcie_clear_bit(trans, CSR_GP_CNTRL,
1388                                    CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
1389         /*
1390          * Above we read the CSR_GP_CNTRL register, which will flush
1391          * any previous writes, but we need the write that clears the
1392          * MAC_ACCESS_REQ bit to be performed before any other writes
1393          * scheduled on different CPUs (after we drop reg_lock).
1394          */
1395         mmiowb();
1396 out:
1397         spin_unlock_irqrestore(&trans_pcie->reg_lock, *flags);
1398 }
1399
1400 static int iwl_trans_pcie_read_mem(struct iwl_trans *trans, u32 addr,
1401                                    void *buf, int dwords)
1402 {
1403         unsigned long flags;
1404         int offs, ret = 0;
1405         u32 *vals = buf;
1406
1407         if (iwl_trans_grab_nic_access(trans, false, &flags)) {
1408                 iwl_write32(trans, HBUS_TARG_MEM_RADDR, addr);
1409                 for (offs = 0; offs < dwords; offs++)
1410                         vals[offs] = iwl_read32(trans, HBUS_TARG_MEM_RDAT);
1411                 iwl_trans_release_nic_access(trans, &flags);
1412         } else {
1413                 ret = -EBUSY;
1414         }
1415         return ret;
1416 }
1417
1418 static int iwl_trans_pcie_write_mem(struct iwl_trans *trans, u32 addr,
1419                                     const void *buf, int dwords)
1420 {
1421         unsigned long flags;
1422         int offs, ret = 0;
1423         const u32 *vals = buf;
1424
1425         if (iwl_trans_grab_nic_access(trans, false, &flags)) {
1426                 iwl_write32(trans, HBUS_TARG_MEM_WADDR, addr);
1427                 for (offs = 0; offs < dwords; offs++)
1428                         iwl_write32(trans, HBUS_TARG_MEM_WDAT,
1429                                     vals ? vals[offs] : 0);
1430                 iwl_trans_release_nic_access(trans, &flags);
1431         } else {
1432                 ret = -EBUSY;
1433         }
1434         return ret;
1435 }
1436
1437 #define IWL_FLUSH_WAIT_MS       2000
1438
1439 static int iwl_trans_pcie_wait_txq_empty(struct iwl_trans *trans, u32 txq_bm)
1440 {
1441         struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1442         struct iwl_txq *txq;
1443         struct iwl_queue *q;
1444         int cnt;
1445         unsigned long now = jiffies;
1446         u32 scd_sram_addr;
1447         u8 buf[16];
1448         int ret = 0;
1449
1450         /* waiting for all the tx frames complete might take a while */
1451         for (cnt = 0; cnt < trans->cfg->base_params->num_of_queues; cnt++) {
1452                 u8 wr_ptr;
1453
1454                 if (cnt == trans_pcie->cmd_queue)
1455                         continue;
1456                 if (!test_bit(cnt, trans_pcie->queue_used))
1457                         continue;
1458                 if (!(BIT(cnt) & txq_bm))
1459                         continue;
1460
1461                 IWL_DEBUG_TX_QUEUES(trans, "Emptying queue %d...\n", cnt);
1462                 txq = &trans_pcie->txq[cnt];
1463                 q = &txq->q;
1464                 wr_ptr = ACCESS_ONCE(q->write_ptr);
1465
1466                 while (q->read_ptr != ACCESS_ONCE(q->write_ptr) &&
1467                        !time_after(jiffies,
1468                                    now + msecs_to_jiffies(IWL_FLUSH_WAIT_MS))) {
1469                         u8 write_ptr = ACCESS_ONCE(q->write_ptr);
1470
1471                         if (WARN_ONCE(wr_ptr != write_ptr,
1472                                       "WR pointer moved while flushing %d -> %d\n",
1473                                       wr_ptr, write_ptr))
1474                                 return -ETIMEDOUT;
1475                         msleep(1);
1476                 }
1477
1478                 if (q->read_ptr != q->write_ptr) {
1479                         IWL_ERR(trans,
1480                                 "fail to flush all tx fifo queues Q %d\n", cnt);
1481                         ret = -ETIMEDOUT;
1482                         break;
1483                 }
1484                 IWL_DEBUG_TX_QUEUES(trans, "Queue %d is now empty.\n", cnt);
1485         }
1486
1487         if (!ret)
1488                 return 0;
1489
1490         IWL_ERR(trans, "Current SW read_ptr %d write_ptr %d\n",
1491                 txq->q.read_ptr, txq->q.write_ptr);
1492
1493         scd_sram_addr = trans_pcie->scd_base_addr +
1494                         SCD_TX_STTS_QUEUE_OFFSET(txq->q.id);
1495         iwl_trans_read_mem_bytes(trans, scd_sram_addr, buf, sizeof(buf));
1496
1497         iwl_print_hex_error(trans, buf, sizeof(buf));
1498
1499         for (cnt = 0; cnt < FH_TCSR_CHNL_NUM; cnt++)
1500                 IWL_ERR(trans, "FH TRBs(%d) = 0x%08x\n", cnt,
1501                         iwl_read_direct32(trans, FH_TX_TRB_REG(cnt)));
1502
1503         for (cnt = 0; cnt < trans->cfg->base_params->num_of_queues; cnt++) {
1504                 u32 status = iwl_read_prph(trans, SCD_QUEUE_STATUS_BITS(cnt));
1505                 u8 fifo = (status >> SCD_QUEUE_STTS_REG_POS_TXF) & 0x7;
1506                 bool active = !!(status & BIT(SCD_QUEUE_STTS_REG_POS_ACTIVE));
1507                 u32 tbl_dw =
1508                         iwl_trans_read_mem32(trans, trans_pcie->scd_base_addr +
1509                                              SCD_TRANS_TBL_OFFSET_QUEUE(cnt));
1510
1511                 if (cnt & 0x1)
1512                         tbl_dw = (tbl_dw & 0xFFFF0000) >> 16;
1513                 else
1514                         tbl_dw = tbl_dw & 0x0000FFFF;
1515
1516                 IWL_ERR(trans,
1517                         "Q %d is %sactive and mapped to fifo %d ra_tid 0x%04x [%d,%d]\n",
1518                         cnt, active ? "" : "in", fifo, tbl_dw,
1519                         iwl_read_prph(trans, SCD_QUEUE_RDPTR(cnt)) &
1520                                 (TFD_QUEUE_SIZE_MAX - 1),
1521                         iwl_read_prph(trans, SCD_QUEUE_WRPTR(cnt)));
1522         }
1523
1524         return ret;
1525 }
1526
1527 static void iwl_trans_pcie_set_bits_mask(struct iwl_trans *trans, u32 reg,
1528                                          u32 mask, u32 value)
1529 {
1530         struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1531         unsigned long flags;
1532
1533         spin_lock_irqsave(&trans_pcie->reg_lock, flags);
1534         __iwl_trans_pcie_set_bits_mask(trans, reg, mask, value);
1535         spin_unlock_irqrestore(&trans_pcie->reg_lock, flags);
1536 }
1537
1538 static const char *get_csr_string(int cmd)
1539 {
1540 #define IWL_CMD(x) case x: return #x
1541         switch (cmd) {
1542         IWL_CMD(CSR_HW_IF_CONFIG_REG);
1543         IWL_CMD(CSR_INT_COALESCING);
1544         IWL_CMD(CSR_INT);
1545         IWL_CMD(CSR_INT_MASK);
1546         IWL_CMD(CSR_FH_INT_STATUS);
1547         IWL_CMD(CSR_GPIO_IN);
1548         IWL_CMD(CSR_RESET);
1549         IWL_CMD(CSR_GP_CNTRL);
1550         IWL_CMD(CSR_HW_REV);
1551         IWL_CMD(CSR_EEPROM_REG);
1552         IWL_CMD(CSR_EEPROM_GP);
1553         IWL_CMD(CSR_OTP_GP_REG);
1554         IWL_CMD(CSR_GIO_REG);
1555         IWL_CMD(CSR_GP_UCODE_REG);
1556         IWL_CMD(CSR_GP_DRIVER_REG);
1557         IWL_CMD(CSR_UCODE_DRV_GP1);
1558         IWL_CMD(CSR_UCODE_DRV_GP2);
1559         IWL_CMD(CSR_LED_REG);
1560         IWL_CMD(CSR_DRAM_INT_TBL_REG);
1561         IWL_CMD(CSR_GIO_CHICKEN_BITS);
1562         IWL_CMD(CSR_ANA_PLL_CFG);
1563         IWL_CMD(CSR_HW_REV_WA_REG);
1564         IWL_CMD(CSR_MONITOR_STATUS_REG);
1565         IWL_CMD(CSR_DBG_HPET_MEM_REG);
1566         default:
1567                 return "UNKNOWN";
1568         }
1569 #undef IWL_CMD
1570 }
1571
1572 void iwl_pcie_dump_csr(struct iwl_trans *trans)
1573 {
1574         int i;
1575         static const u32 csr_tbl[] = {
1576                 CSR_HW_IF_CONFIG_REG,
1577                 CSR_INT_COALESCING,
1578                 CSR_INT,
1579                 CSR_INT_MASK,
1580                 CSR_FH_INT_STATUS,
1581                 CSR_GPIO_IN,
1582                 CSR_RESET,
1583                 CSR_GP_CNTRL,
1584                 CSR_HW_REV,
1585                 CSR_EEPROM_REG,
1586                 CSR_EEPROM_GP,
1587                 CSR_OTP_GP_REG,
1588                 CSR_GIO_REG,
1589                 CSR_GP_UCODE_REG,
1590                 CSR_GP_DRIVER_REG,
1591                 CSR_UCODE_DRV_GP1,
1592                 CSR_UCODE_DRV_GP2,
1593                 CSR_LED_REG,
1594                 CSR_DRAM_INT_TBL_REG,
1595                 CSR_GIO_CHICKEN_BITS,
1596                 CSR_ANA_PLL_CFG,
1597                 CSR_MONITOR_STATUS_REG,
1598                 CSR_HW_REV_WA_REG,
1599                 CSR_DBG_HPET_MEM_REG
1600         };
1601         IWL_ERR(trans, "CSR values:\n");
1602         IWL_ERR(trans, "(2nd byte of CSR_INT_COALESCING is "
1603                 "CSR_INT_PERIODIC_REG)\n");
1604         for (i = 0; i <  ARRAY_SIZE(csr_tbl); i++) {
1605                 IWL_ERR(trans, "  %25s: 0X%08x\n",
1606                         get_csr_string(csr_tbl[i]),
1607                         iwl_read32(trans, csr_tbl[i]));
1608         }
1609 }
1610
1611 #ifdef CONFIG_IWLWIFI_DEBUGFS
1612 /* create and remove of files */
1613 #define DEBUGFS_ADD_FILE(name, parent, mode) do {                       \
1614         if (!debugfs_create_file(#name, mode, parent, trans,            \
1615                                  &iwl_dbgfs_##name##_ops))              \
1616                 goto err;                                               \
1617 } while (0)
1618
1619 /* file operation */
1620 #define DEBUGFS_READ_FILE_OPS(name)                                     \
1621 static const struct file_operations iwl_dbgfs_##name##_ops = {          \
1622         .read = iwl_dbgfs_##name##_read,                                \
1623         .open = simple_open,                                            \
1624         .llseek = generic_file_llseek,                                  \
1625 };
1626
1627 #define DEBUGFS_WRITE_FILE_OPS(name)                                    \
1628 static const struct file_operations iwl_dbgfs_##name##_ops = {          \
1629         .write = iwl_dbgfs_##name##_write,                              \
1630         .open = simple_open,                                            \
1631         .llseek = generic_file_llseek,                                  \
1632 };
1633
1634 #define DEBUGFS_READ_WRITE_FILE_OPS(name)                               \
1635 static const struct file_operations iwl_dbgfs_##name##_ops = {          \
1636         .write = iwl_dbgfs_##name##_write,                              \
1637         .read = iwl_dbgfs_##name##_read,                                \
1638         .open = simple_open,                                            \
1639         .llseek = generic_file_llseek,                                  \
1640 };
1641
1642 static ssize_t iwl_dbgfs_tx_queue_read(struct file *file,
1643                                        char __user *user_buf,
1644                                        size_t count, loff_t *ppos)
1645 {
1646         struct iwl_trans *trans = file->private_data;
1647         struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1648         struct iwl_txq *txq;
1649         struct iwl_queue *q;
1650         char *buf;
1651         int pos = 0;
1652         int cnt;
1653         int ret;
1654         size_t bufsz;
1655
1656         bufsz = sizeof(char) * 64 * trans->cfg->base_params->num_of_queues;
1657
1658         if (!trans_pcie->txq)
1659                 return -EAGAIN;
1660
1661         buf = kzalloc(bufsz, GFP_KERNEL);
1662         if (!buf)
1663                 return -ENOMEM;
1664
1665         for (cnt = 0; cnt < trans->cfg->base_params->num_of_queues; cnt++) {
1666                 txq = &trans_pcie->txq[cnt];
1667                 q = &txq->q;
1668                 pos += scnprintf(buf + pos, bufsz - pos,
1669                                 "hwq %.2d: read=%u write=%u use=%d stop=%d need_update=%d%s\n",
1670                                 cnt, q->read_ptr, q->write_ptr,
1671                                 !!test_bit(cnt, trans_pcie->queue_used),
1672                                  !!test_bit(cnt, trans_pcie->queue_stopped),
1673                                  txq->need_update,
1674                                  (cnt == trans_pcie->cmd_queue ? " HCMD" : ""));
1675         }
1676         ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
1677         kfree(buf);
1678         return ret;
1679 }
1680
1681 static ssize_t iwl_dbgfs_rx_queue_read(struct file *file,
1682                                        char __user *user_buf,
1683                                        size_t count, loff_t *ppos)
1684 {
1685         struct iwl_trans *trans = file->private_data;
1686         struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1687         struct iwl_rxq *rxq = &trans_pcie->rxq;
1688         char buf[256];
1689         int pos = 0;
1690         const size_t bufsz = sizeof(buf);
1691
1692         pos += scnprintf(buf + pos, bufsz - pos, "read: %u\n",
1693                                                 rxq->read);
1694         pos += scnprintf(buf + pos, bufsz - pos, "write: %u\n",
1695                                                 rxq->write);
1696         pos += scnprintf(buf + pos, bufsz - pos, "write_actual: %u\n",
1697                                                 rxq->write_actual);
1698         pos += scnprintf(buf + pos, bufsz - pos, "need_update: %d\n",
1699                                                 rxq->need_update);
1700         pos += scnprintf(buf + pos, bufsz - pos, "free_count: %u\n",
1701                                                 rxq->free_count);
1702         if (rxq->rb_stts) {
1703                 pos += scnprintf(buf + pos, bufsz - pos, "closed_rb_num: %u\n",
1704                          le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF);
1705         } else {
1706                 pos += scnprintf(buf + pos, bufsz - pos,
1707                                         "closed_rb_num: Not Allocated\n");
1708         }
1709         return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
1710 }
1711
1712 static ssize_t iwl_dbgfs_interrupt_read(struct file *file,
1713                                         char __user *user_buf,
1714                                         size_t count, loff_t *ppos)
1715 {
1716         struct iwl_trans *trans = file->private_data;
1717         struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1718         struct isr_statistics *isr_stats = &trans_pcie->isr_stats;
1719
1720         int pos = 0;
1721         char *buf;
1722         int bufsz = 24 * 64; /* 24 items * 64 char per item */
1723         ssize_t ret;
1724
1725         buf = kzalloc(bufsz, GFP_KERNEL);
1726         if (!buf)
1727                 return -ENOMEM;
1728
1729         pos += scnprintf(buf + pos, bufsz - pos,
1730                         "Interrupt Statistics Report:\n");
1731
1732         pos += scnprintf(buf + pos, bufsz - pos, "HW Error:\t\t\t %u\n",
1733                 isr_stats->hw);
1734         pos += scnprintf(buf + pos, bufsz - pos, "SW Error:\t\t\t %u\n",
1735                 isr_stats->sw);
1736         if (isr_stats->sw || isr_stats->hw) {
1737                 pos += scnprintf(buf + pos, bufsz - pos,
1738                         "\tLast Restarting Code:  0x%X\n",
1739                         isr_stats->err_code);
1740         }
1741 #ifdef CONFIG_IWLWIFI_DEBUG
1742         pos += scnprintf(buf + pos, bufsz - pos, "Frame transmitted:\t\t %u\n",
1743                 isr_stats->sch);
1744         pos += scnprintf(buf + pos, bufsz - pos, "Alive interrupt:\t\t %u\n",
1745                 isr_stats->alive);
1746 #endif
1747         pos += scnprintf(buf + pos, bufsz - pos,
1748                 "HW RF KILL switch toggled:\t %u\n", isr_stats->rfkill);
1749
1750         pos += scnprintf(buf + pos, bufsz - pos, "CT KILL:\t\t\t %u\n",
1751                 isr_stats->ctkill);
1752
1753         pos += scnprintf(buf + pos, bufsz - pos, "Wakeup Interrupt:\t\t %u\n",
1754                 isr_stats->wakeup);
1755
1756         pos += scnprintf(buf + pos, bufsz - pos,
1757                 "Rx command responses:\t\t %u\n", isr_stats->rx);
1758
1759         pos += scnprintf(buf + pos, bufsz - pos, "Tx/FH interrupt:\t\t %u\n",
1760                 isr_stats->tx);
1761
1762         pos += scnprintf(buf + pos, bufsz - pos, "Unexpected INTA:\t\t %u\n",
1763                 isr_stats->unhandled);
1764
1765         ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
1766         kfree(buf);
1767         return ret;
1768 }
1769
1770 static ssize_t iwl_dbgfs_interrupt_write(struct file *file,
1771                                          const char __user *user_buf,
1772                                          size_t count, loff_t *ppos)
1773 {
1774         struct iwl_trans *trans = file->private_data;
1775         struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
1776         struct isr_statistics *isr_stats = &trans_pcie->isr_stats;
1777
1778         char buf[8];
1779         int buf_size;
1780         u32 reset_flag;
1781
1782         memset(buf, 0, sizeof(buf));
1783         buf_size = min(count, sizeof(buf) -  1);
1784         if (copy_from_user(buf, user_buf, buf_size))
1785                 return -EFAULT;
1786         if (sscanf(buf, "%x", &reset_flag) != 1)
1787                 return -EFAULT;
1788         if (reset_flag == 0)
1789                 memset(isr_stats, 0, sizeof(*isr_stats));
1790
1791         return count;
1792 }
1793
1794 static ssize_t iwl_dbgfs_csr_write(struct file *file,
1795                                    const char __user *user_buf,
1796                                    size_t count, loff_t *ppos)
1797 {
1798         struct iwl_trans *trans = file->private_data;
1799         char buf[8];
1800         int buf_size;
1801         int csr;
1802
1803         memset(buf, 0, sizeof(buf));
1804         buf_size = min(count, sizeof(buf) -  1);
1805         if (copy_from_user(buf, user_buf, buf_size))
1806                 return -EFAULT;
1807         if (sscanf(buf, "%d", &csr) != 1)
1808                 return -EFAULT;
1809
1810         iwl_pcie_dump_csr(trans);
1811
1812         return count;
1813 }
1814
1815 static ssize_t iwl_dbgfs_fh_reg_read(struct file *file,
1816                                      char __user *user_buf,
1817                                      size_t count, loff_t *ppos)
1818 {
1819         struct iwl_trans *trans = file->private_data;
1820         char *buf = NULL;
1821         ssize_t ret;
1822
1823         ret = iwl_dump_fh(trans, &buf);
1824         if (ret < 0)
1825                 return ret;
1826         if (!buf)
1827                 return -EINVAL;
1828         ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
1829         kfree(buf);
1830         return ret;
1831 }
1832
1833 DEBUGFS_READ_WRITE_FILE_OPS(interrupt);
1834 DEBUGFS_READ_FILE_OPS(fh_reg);
1835 DEBUGFS_READ_FILE_OPS(rx_queue);
1836 DEBUGFS_READ_FILE_OPS(tx_queue);
1837 DEBUGFS_WRITE_FILE_OPS(csr);
1838
1839 /*
1840  * Create the debugfs files and directories
1841  *
1842  */
1843 static int iwl_trans_pcie_dbgfs_register(struct iwl_trans *trans,
1844                                          struct dentry *dir)
1845 {
1846         DEBUGFS_ADD_FILE(rx_queue, dir, S_IRUSR);
1847         DEBUGFS_ADD_FILE(tx_queue, dir, S_IRUSR);
1848         DEBUGFS_ADD_FILE(interrupt, dir, S_IWUSR | S_IRUSR);
1849         DEBUGFS_ADD_FILE(csr, dir, S_IWUSR);
1850         DEBUGFS_ADD_FILE(fh_reg, dir, S_IRUSR);
1851         return 0;
1852
1853 err:
1854         IWL_ERR(trans, "failed to create the trans debugfs entry\n");
1855         return -ENOMEM;
1856 }
1857 #else
1858 static int iwl_trans_pcie_dbgfs_register(struct iwl_trans *trans,
1859                                          struct dentry *dir)
1860 {
1861         return 0;
1862 }
1863 #endif /*CONFIG_IWLWIFI_DEBUGFS */
1864
1865 static u32 iwl_trans_pcie_get_cmdlen(struct iwl_tfd *tfd)
1866 {
1867         u32 cmdlen = 0;
1868         int i;
1869
1870         for (i = 0; i < IWL_NUM_OF_TBS; i++)
1871                 cmdlen += iwl_pcie_tfd_tb_get_len(tfd, i);
1872
1873         return cmdlen;
1874 }
1875
1876 static const struct {
1877         u32 start, end;
1878 } iwl_prph_dump_addr[] = {
1879         { .start = 0x00a00000, .end = 0x00a00000 },
1880         { .start = 0x00a0000c, .end = 0x00a00024 },
1881         { .start = 0x00a0002c, .end = 0x00a0003c },
1882         { .start = 0x00a00410, .end = 0x00a00418 },
1883         { .start = 0x00a00420, .end = 0x00a00420 },
1884         { .start = 0x00a00428, .end = 0x00a00428 },
1885         { .start = 0x00a00430, .end = 0x00a0043c },
1886         { .start = 0x00a00444, .end = 0x00a00444 },
1887         { .start = 0x00a004c0, .end = 0x00a004cc },
1888         { .start = 0x00a004d8, .end = 0x00a004d8 },
1889         { .start = 0x00a004e0, .end = 0x00a004f0 },
1890         { .start = 0x00a00840, .end = 0x00a00840 },
1891         { .start = 0x00a00850, .end = 0x00a00858 },
1892         { .start = 0x00a01004, .end = 0x00a01008 },
1893         { .start = 0x00a01010, .end = 0x00a01010 },
1894         { .start = 0x00a01018, .end = 0x00a01018 },
1895         { .start = 0x00a01024, .end = 0x00a01024 },
1896         { .start = 0x00a0102c, .end = 0x00a01034 },
1897         { .start = 0x00a0103c, .end = 0x00a01040 },
1898         { .start = 0x00a01048, .end = 0x00a01094 },
1899         { .start = 0x00a01c00, .end = 0x00a01c20 },
1900         { .start = 0x00a01c58, .end = 0x00a01c58 },
1901         { .start = 0x00a01c7c, .end = 0x00a01c7c },
1902         { .start = 0x00a01c28, .end = 0x00a01c54 },
1903         { .start = 0x00a01c5c, .end = 0x00a01c5c },
1904         { .start = 0x00a01c84, .end = 0x00a01c84 },
1905         { .start = 0x00a01ce0, .end = 0x00a01d0c },
1906         { .start = 0x00a01d18, .end = 0x00a01d20 },
1907         { .start = 0x00a01d2c, .end = 0x00a01d30 },
1908         { .start = 0x00a01d40, .end = 0x00a01d5c },
1909         { .start = 0x00a01d80, .end = 0x00a01d80 },
1910         { .start = 0x00a01d98, .end = 0x00a01d98 },
1911         { .start = 0x00a01dc0, .end = 0x00a01dfc },
1912         { .start = 0x00a01e00, .end = 0x00a01e2c },
1913         { .start = 0x00a01e40, .end = 0x00a01e60 },
1914         { .start = 0x00a01e84, .end = 0x00a01e90 },
1915         { .start = 0x00a01e9c, .end = 0x00a01ec4 },
1916         { .start = 0x00a01ed0, .end = 0x00a01ed0 },
1917         { .start = 0x00a01f00, .end = 0x00a01f14 },
1918         { .start = 0x00a01f44, .end = 0x00a01f58 },
1919         { .start = 0x00a01f80, .end = 0x00a01fa8 },
1920         { .start = 0x00a01fb0, .end = 0x00a01fbc },
1921         { .start = 0x00a01ff8, .end = 0x00a01ffc },
1922         { .start = 0x00a02000, .end = 0x00a02048 },
1923         { .start = 0x00a02068, .end = 0x00a020f0 },
1924         { .start = 0x00a02100, .end = 0x00a02118 },
1925         { .start = 0x00a02140, .end = 0x00a0214c },
1926         { .start = 0x00a02168, .end = 0x00a0218c },
1927         { .start = 0x00a021c0, .end = 0x00a021c0 },
1928         { .start = 0x00a02400, .end = 0x00a02410 },
1929         { .start = 0x00a02418, .end = 0x00a02420 },
1930         { .start = 0x00a02428, .end = 0x00a0242c },
1931         { .start = 0x00a02434, .end = 0x00a02434 },
1932         { .start = 0x00a02440, .end = 0x00a02460 },
1933         { .start = 0x00a02468, .end = 0x00a024b0 },
1934         { .start = 0x00a024c8, .end = 0x00a024cc },
1935         { .start = 0x00a02500, .end = 0x00a02504 },
1936         { .start = 0x00a0250c, .end = 0x00a02510 },
1937         { .start = 0x00a02540, .end = 0x00a02554 },
1938         { .start = 0x00a02580, .end = 0x00a025f4 },
1939         { .start = 0x00a02600, .end = 0x00a0260c },
1940         { .start = 0x00a02648, .end = 0x00a02650 },
1941         { .start = 0x00a02680, .end = 0x00a02680 },
1942         { .start = 0x00a026c0, .end = 0x00a026d0 },
1943         { .start = 0x00a02700, .end = 0x00a0270c },
1944         { .start = 0x00a02804, .end = 0x00a02804 },
1945         { .start = 0x00a02818, .end = 0x00a0281c },
1946         { .start = 0x00a02c00, .end = 0x00a02db4 },
1947         { .start = 0x00a02df4, .end = 0x00a02fb0 },
1948         { .start = 0x00a03000, .end = 0x00a03014 },
1949         { .start = 0x00a0301c, .end = 0x00a0302c },
1950         { .start = 0x00a03034, .end = 0x00a03038 },
1951         { .start = 0x00a03040, .end = 0x00a03048 },
1952         { .start = 0x00a03060, .end = 0x00a03068 },
1953         { .start = 0x00a03070, .end = 0x00a03074 },
1954         { .start = 0x00a0307c, .end = 0x00a0307c },
1955         { .start = 0x00a03080, .end = 0x00a03084 },
1956         { .start = 0x00a0308c, .end = 0x00a03090 },
1957         { .start = 0x00a03098, .end = 0x00a03098 },
1958         { .start = 0x00a030a0, .end = 0x00a030a0 },
1959         { .start = 0x00a030a8, .end = 0x00a030b4 },
1960         { .start = 0x00a030bc, .end = 0x00a030bc },
1961         { .start = 0x00a030c0, .end = 0x00a0312c },
1962         { .start = 0x00a03c00, .end = 0x00a03c5c },
1963         { .start = 0x00a04400, .end = 0x00a04454 },
1964         { .start = 0x00a04460, .end = 0x00a04474 },
1965         { .start = 0x00a044c0, .end = 0x00a044ec },
1966         { .start = 0x00a04500, .end = 0x00a04504 },
1967         { .start = 0x00a04510, .end = 0x00a04538 },
1968         { .start = 0x00a04540, .end = 0x00a04548 },
1969         { .start = 0x00a04560, .end = 0x00a0457c },
1970         { .start = 0x00a04590, .end = 0x00a04598 },
1971         { .start = 0x00a045c0, .end = 0x00a045f4 },
1972 };
1973
1974 static u32 iwl_trans_pcie_dump_prph(struct iwl_trans *trans,
1975                                     struct iwl_fw_error_dump_data **data)
1976 {
1977         struct iwl_fw_error_dump_prph *prph;
1978         unsigned long flags;
1979         u32 prph_len = 0, i;
1980
1981         if (!iwl_trans_grab_nic_access(trans, false, &flags))
1982                 return 0;
1983
1984         for (i = 0; i < ARRAY_SIZE(iwl_prph_dump_addr); i++) {
1985                 /* The range includes both boundaries */
1986                 int num_bytes_in_chunk = iwl_prph_dump_addr[i].end -
1987                          iwl_prph_dump_addr[i].start + 4;
1988                 int reg;
1989                 __le32 *val;
1990
1991                 prph_len += sizeof(**data) + sizeof(*prph) + num_bytes_in_chunk;
1992
1993                 (*data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_PRPH);
1994                 (*data)->len = cpu_to_le32(sizeof(*prph) +
1995                                         num_bytes_in_chunk);
1996                 prph = (void *)(*data)->data;
1997                 prph->prph_start = cpu_to_le32(iwl_prph_dump_addr[i].start);
1998                 val = (void *)prph->data;
1999
2000                 for (reg = iwl_prph_dump_addr[i].start;
2001                      reg <= iwl_prph_dump_addr[i].end;
2002                      reg += 4)
2003                         *val++ = cpu_to_le32(iwl_trans_pcie_read_prph(trans,
2004                                                                       reg));
2005                 *data = iwl_fw_error_next_data(*data);
2006         }
2007
2008         iwl_trans_release_nic_access(trans, &flags);
2009
2010         return prph_len;
2011 }
2012
2013 #define IWL_CSR_TO_DUMP (0x250)
2014
2015 static u32 iwl_trans_pcie_dump_csr(struct iwl_trans *trans,
2016                                    struct iwl_fw_error_dump_data **data)
2017 {
2018         u32 csr_len = sizeof(**data) + IWL_CSR_TO_DUMP;
2019         __le32 *val;
2020         int i;
2021
2022         (*data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_CSR);
2023         (*data)->len = cpu_to_le32(IWL_CSR_TO_DUMP);
2024         val = (void *)(*data)->data;
2025
2026         for (i = 0; i < IWL_CSR_TO_DUMP; i += 4)
2027                 *val++ = cpu_to_le32(iwl_trans_pcie_read32(trans, i));
2028
2029         *data = iwl_fw_error_next_data(*data);
2030
2031         return csr_len;
2032 }
2033
2034 static u32 iwl_trans_pcie_fh_regs_dump(struct iwl_trans *trans,
2035                                        struct iwl_fw_error_dump_data **data)
2036 {
2037         u32 fh_regs_len = FH_MEM_UPPER_BOUND - FH_MEM_LOWER_BOUND;
2038         unsigned long flags;
2039         __le32 *val;
2040         int i;
2041
2042         if (!iwl_trans_grab_nic_access(trans, false, &flags))
2043                 return 0;
2044
2045         (*data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_FH_REGS);
2046         (*data)->len = cpu_to_le32(fh_regs_len);
2047         val = (void *)(*data)->data;
2048
2049         for (i = FH_MEM_LOWER_BOUND; i < FH_MEM_UPPER_BOUND; i += sizeof(u32))
2050                 *val++ = cpu_to_le32(iwl_trans_pcie_read32(trans, i));
2051
2052         iwl_trans_release_nic_access(trans, &flags);
2053
2054         *data = iwl_fw_error_next_data(*data);
2055
2056         return sizeof(**data) + fh_regs_len;
2057 }
2058
2059 static
2060 struct iwl_trans_dump_data *iwl_trans_pcie_dump_data(struct iwl_trans *trans)
2061 {
2062         struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2063         struct iwl_fw_error_dump_data *data;
2064         struct iwl_txq *cmdq = &trans_pcie->txq[trans_pcie->cmd_queue];
2065         struct iwl_fw_error_dump_txcmd *txcmd;
2066         struct iwl_trans_dump_data *dump_data;
2067         u32 len;
2068         u32 monitor_len;
2069         int i, ptr;
2070
2071         /* transport dump header */
2072         len = sizeof(*dump_data);
2073
2074         /* host commands */
2075         len += sizeof(*data) +
2076                 cmdq->q.n_window * (sizeof(*txcmd) + TFD_MAX_PAYLOAD_SIZE);
2077
2078         /* CSR registers */
2079         len += sizeof(*data) + IWL_CSR_TO_DUMP;
2080
2081         /* PRPH registers */
2082         for (i = 0; i < ARRAY_SIZE(iwl_prph_dump_addr); i++) {
2083                 /* The range includes both boundaries */
2084                 int num_bytes_in_chunk = iwl_prph_dump_addr[i].end -
2085                         iwl_prph_dump_addr[i].start + 4;
2086
2087                 len += sizeof(*data) + sizeof(struct iwl_fw_error_dump_prph) +
2088                         num_bytes_in_chunk;
2089         }
2090
2091         /* FH registers */
2092         len += sizeof(*data) + (FH_MEM_UPPER_BOUND - FH_MEM_LOWER_BOUND);
2093
2094         /* FW monitor */
2095         if (trans_pcie->fw_mon_page) {
2096                 len += sizeof(*data) + sizeof(struct iwl_fw_error_dump_fw_mon) +
2097                        trans_pcie->fw_mon_size;
2098                 monitor_len = trans_pcie->fw_mon_size;
2099         } else if (trans->dbg_dest_tlv) {
2100                 u32 base, end;
2101
2102                 base = le32_to_cpu(trans->dbg_dest_tlv->base_reg);
2103                 end = le32_to_cpu(trans->dbg_dest_tlv->end_reg);
2104
2105                 base = iwl_read_prph(trans, base) <<
2106                        trans->dbg_dest_tlv->base_shift;
2107                 end = iwl_read_prph(trans, end) <<
2108                       trans->dbg_dest_tlv->end_shift;
2109
2110                 /* Make "end" point to the actual end */
2111                 if (trans->cfg->device_family == IWL_DEVICE_FAMILY_8000)
2112                         end += (1 << trans->dbg_dest_tlv->end_shift);
2113                 monitor_len = end - base;
2114                 len += sizeof(*data) + sizeof(struct iwl_fw_error_dump_fw_mon) +
2115                        monitor_len;
2116         } else {
2117                 monitor_len = 0;
2118         }
2119
2120         dump_data = vzalloc(len);
2121         if (!dump_data)
2122                 return NULL;
2123
2124         len = 0;
2125         data = (void *)dump_data->data;
2126         data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_TXCMD);
2127         txcmd = (void *)data->data;
2128         spin_lock_bh(&cmdq->lock);
2129         ptr = cmdq->q.write_ptr;
2130         for (i = 0; i < cmdq->q.n_window; i++) {
2131                 u8 idx = get_cmd_index(&cmdq->q, ptr);
2132                 u32 caplen, cmdlen;
2133
2134                 cmdlen = iwl_trans_pcie_get_cmdlen(&cmdq->tfds[ptr]);
2135                 caplen = min_t(u32, TFD_MAX_PAYLOAD_SIZE, cmdlen);
2136
2137                 if (cmdlen) {
2138                         len += sizeof(*txcmd) + caplen;
2139                         txcmd->cmdlen = cpu_to_le32(cmdlen);
2140                         txcmd->caplen = cpu_to_le32(caplen);
2141                         memcpy(txcmd->data, cmdq->entries[idx].cmd, caplen);
2142                         txcmd = (void *)((u8 *)txcmd->data + caplen);
2143                 }
2144
2145                 ptr = iwl_queue_dec_wrap(ptr);
2146         }
2147         spin_unlock_bh(&cmdq->lock);
2148
2149         data->len = cpu_to_le32(len);
2150         len += sizeof(*data);
2151         data = iwl_fw_error_next_data(data);
2152
2153         len += iwl_trans_pcie_dump_prph(trans, &data);
2154         len += iwl_trans_pcie_dump_csr(trans, &data);
2155         len += iwl_trans_pcie_fh_regs_dump(trans, &data);
2156         /* data is already pointing to the next section */
2157
2158         if ((trans_pcie->fw_mon_page &&
2159              trans->cfg->device_family == IWL_DEVICE_FAMILY_7000) ||
2160             trans->dbg_dest_tlv) {
2161                 struct iwl_fw_error_dump_fw_mon *fw_mon_data;
2162                 u32 base, write_ptr, wrap_cnt;
2163
2164                 /* If there was a dest TLV - use the values from there */
2165                 if (trans->dbg_dest_tlv) {
2166                         write_ptr =
2167                                 le32_to_cpu(trans->dbg_dest_tlv->write_ptr_reg);
2168                         wrap_cnt = le32_to_cpu(trans->dbg_dest_tlv->wrap_count);
2169                         base = le32_to_cpu(trans->dbg_dest_tlv->base_reg);
2170                 } else {
2171                         base = MON_BUFF_BASE_ADDR;
2172                         write_ptr = MON_BUFF_WRPTR;
2173                         wrap_cnt = MON_BUFF_CYCLE_CNT;
2174                 }
2175
2176                 data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_FW_MONITOR);
2177                 fw_mon_data = (void *)data->data;
2178                 fw_mon_data->fw_mon_wr_ptr =
2179                         cpu_to_le32(iwl_read_prph(trans, write_ptr));
2180                 fw_mon_data->fw_mon_cycle_cnt =
2181                         cpu_to_le32(iwl_read_prph(trans, wrap_cnt));
2182                 fw_mon_data->fw_mon_base_ptr =
2183                         cpu_to_le32(iwl_read_prph(trans, base));
2184
2185                 len += sizeof(*data) + sizeof(*fw_mon_data);
2186                 if (trans_pcie->fw_mon_page) {
2187                         data->len = cpu_to_le32(trans_pcie->fw_mon_size +
2188                                                 sizeof(*fw_mon_data));
2189
2190                         /*
2191                          * The firmware is now asserted, it won't write anything
2192                          * to the buffer. CPU can take ownership to fetch the
2193                          * data. The buffer will be handed back to the device
2194                          * before the firmware will be restarted.
2195                          */
2196                         dma_sync_single_for_cpu(trans->dev,
2197                                                 trans_pcie->fw_mon_phys,
2198                                                 trans_pcie->fw_mon_size,
2199                                                 DMA_FROM_DEVICE);
2200                         memcpy(fw_mon_data->data,
2201                                page_address(trans_pcie->fw_mon_page),
2202                                trans_pcie->fw_mon_size);
2203
2204                         len += trans_pcie->fw_mon_size;
2205                 } else {
2206                         /* If we are here then the buffer is internal */
2207
2208                         /*
2209                          * Update pointers to reflect actual values after
2210                          * shifting
2211                          */
2212                         base = iwl_read_prph(trans, base) <<
2213                                trans->dbg_dest_tlv->base_shift;
2214                         iwl_trans_read_mem(trans, base, fw_mon_data->data,
2215                                            monitor_len / sizeof(u32));
2216                         data->len = cpu_to_le32(sizeof(*fw_mon_data) +
2217                                                 monitor_len);
2218                         len += monitor_len;
2219                 }
2220         }
2221
2222         dump_data->len = len;
2223
2224         return dump_data;
2225 }
2226
2227 static const struct iwl_trans_ops trans_ops_pcie = {
2228         .start_hw = iwl_trans_pcie_start_hw,
2229         .op_mode_leave = iwl_trans_pcie_op_mode_leave,
2230         .fw_alive = iwl_trans_pcie_fw_alive,
2231         .start_fw = iwl_trans_pcie_start_fw,
2232         .stop_device = iwl_trans_pcie_stop_device,
2233
2234         .d3_suspend = iwl_trans_pcie_d3_suspend,
2235         .d3_resume = iwl_trans_pcie_d3_resume,
2236
2237         .send_cmd = iwl_trans_pcie_send_hcmd,
2238
2239         .tx = iwl_trans_pcie_tx,
2240         .reclaim = iwl_trans_pcie_reclaim,
2241
2242         .txq_disable = iwl_trans_pcie_txq_disable,
2243         .txq_enable = iwl_trans_pcie_txq_enable,
2244
2245         .dbgfs_register = iwl_trans_pcie_dbgfs_register,
2246
2247         .wait_tx_queue_empty = iwl_trans_pcie_wait_txq_empty,
2248
2249         .write8 = iwl_trans_pcie_write8,
2250         .write32 = iwl_trans_pcie_write32,
2251         .read32 = iwl_trans_pcie_read32,
2252         .read_prph = iwl_trans_pcie_read_prph,
2253         .write_prph = iwl_trans_pcie_write_prph,
2254         .read_mem = iwl_trans_pcie_read_mem,
2255         .write_mem = iwl_trans_pcie_write_mem,
2256         .configure = iwl_trans_pcie_configure,
2257         .set_pmi = iwl_trans_pcie_set_pmi,
2258         .grab_nic_access = iwl_trans_pcie_grab_nic_access,
2259         .release_nic_access = iwl_trans_pcie_release_nic_access,
2260         .set_bits_mask = iwl_trans_pcie_set_bits_mask,
2261
2262         .dump_data = iwl_trans_pcie_dump_data,
2263 };
2264
2265 struct iwl_trans *iwl_trans_pcie_alloc(struct pci_dev *pdev,
2266                                        const struct pci_device_id *ent,
2267                                        const struct iwl_cfg *cfg)
2268 {
2269         struct iwl_trans_pcie *trans_pcie;
2270         struct iwl_trans *trans;
2271         u16 pci_cmd;
2272         int err;
2273
2274         trans = kzalloc(sizeof(struct iwl_trans) +
2275                         sizeof(struct iwl_trans_pcie), GFP_KERNEL);
2276         if (!trans) {
2277                 err = -ENOMEM;
2278                 goto out;
2279         }
2280
2281         trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
2282
2283         trans->ops = &trans_ops_pcie;
2284         trans->cfg = cfg;
2285         trans_lockdep_init(trans);
2286         trans_pcie->trans = trans;
2287         spin_lock_init(&trans_pcie->irq_lock);
2288         spin_lock_init(&trans_pcie->reg_lock);
2289         init_waitqueue_head(&trans_pcie->ucode_write_waitq);
2290
2291         err = pci_enable_device(pdev);
2292         if (err)
2293                 goto out_no_pci;
2294
2295         if (!cfg->base_params->pcie_l1_allowed) {
2296                 /*
2297                  * W/A - seems to solve weird behavior. We need to remove this
2298                  * if we don't want to stay in L1 all the time. This wastes a
2299                  * lot of power.
2300                  */
2301                 pci_disable_link_state(pdev, PCIE_LINK_STATE_L0S |
2302                                        PCIE_LINK_STATE_L1 |
2303                                        PCIE_LINK_STATE_CLKPM);
2304         }
2305
2306         pci_set_master(pdev);
2307
2308         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(36));
2309         if (!err)
2310                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(36));
2311         if (err) {
2312                 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
2313                 if (!err)
2314                         err = pci_set_consistent_dma_mask(pdev,
2315                                                           DMA_BIT_MASK(32));
2316                 /* both attempts failed: */
2317                 if (err) {
2318                         dev_err(&pdev->dev, "No suitable DMA available\n");
2319                         goto out_pci_disable_device;
2320                 }
2321         }
2322
2323         err = pci_request_regions(pdev, DRV_NAME);
2324         if (err) {
2325                 dev_err(&pdev->dev, "pci_request_regions failed\n");
2326                 goto out_pci_disable_device;
2327         }
2328
2329         trans_pcie->hw_base = pci_ioremap_bar(pdev, 0);
2330         if (!trans_pcie->hw_base) {
2331                 dev_err(&pdev->dev, "pci_ioremap_bar failed\n");
2332                 err = -ENODEV;
2333                 goto out_pci_release_regions;
2334         }
2335
2336         /* We disable the RETRY_TIMEOUT register (0x41) to keep
2337          * PCI Tx retries from interfering with C3 CPU state */
2338         pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
2339
2340         trans->dev = &pdev->dev;
2341         trans_pcie->pci_dev = pdev;
2342         iwl_disable_interrupts(trans);
2343
2344         err = pci_enable_msi(pdev);
2345         if (err) {
2346                 dev_err(&pdev->dev, "pci_enable_msi failed(0X%x)\n", err);
2347                 /* enable rfkill interrupt: hw bug w/a */
2348                 pci_read_config_word(pdev, PCI_COMMAND, &pci_cmd);
2349                 if (pci_cmd & PCI_COMMAND_INTX_DISABLE) {
2350                         pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
2351                         pci_write_config_word(pdev, PCI_COMMAND, pci_cmd);
2352                 }
2353         }
2354
2355         trans->hw_rev = iwl_read32(trans, CSR_HW_REV);
2356         /*
2357          * In the 8000 HW family the format of the 4 bytes of CSR_HW_REV have
2358          * changed, and now the revision step also includes bit 0-1 (no more
2359          * "dash" value). To keep hw_rev backwards compatible - we'll store it
2360          * in the old format.
2361          */
2362         if (trans->cfg->device_family == IWL_DEVICE_FAMILY_8000)
2363                 trans->hw_rev = (trans->hw_rev & 0xfff0) |
2364                                 (CSR_HW_REV_STEP(trans->hw_rev << 2) << 2);
2365
2366         trans->hw_id = (pdev->device << 16) + pdev->subsystem_device;
2367         snprintf(trans->hw_id_str, sizeof(trans->hw_id_str),
2368                  "PCI ID: 0x%04X:0x%04X", pdev->device, pdev->subsystem_device);
2369
2370         /* Initialize the wait queue for commands */
2371         init_waitqueue_head(&trans_pcie->wait_command_queue);
2372
2373         snprintf(trans->dev_cmd_pool_name, sizeof(trans->dev_cmd_pool_name),
2374                  "iwl_cmd_pool:%s", dev_name(trans->dev));
2375
2376         trans->dev_cmd_headroom = 0;
2377         trans->dev_cmd_pool =
2378                 kmem_cache_create(trans->dev_cmd_pool_name,
2379                                   sizeof(struct iwl_device_cmd)
2380                                   + trans->dev_cmd_headroom,
2381                                   sizeof(void *),
2382                                   SLAB_HWCACHE_ALIGN,
2383                                   NULL);
2384
2385         if (!trans->dev_cmd_pool) {
2386                 err = -ENOMEM;
2387                 goto out_pci_disable_msi;
2388         }
2389
2390         if (iwl_pcie_alloc_ict(trans))
2391                 goto out_free_cmd_pool;
2392
2393         err = request_threaded_irq(pdev->irq, iwl_pcie_isr,
2394                                    iwl_pcie_irq_handler,
2395                                    IRQF_SHARED, DRV_NAME, trans);
2396         if (err) {
2397                 IWL_ERR(trans, "Error allocating IRQ %d\n", pdev->irq);
2398                 goto out_free_ict;
2399         }
2400
2401         trans_pcie->inta_mask = CSR_INI_SET_MASK;
2402
2403         return trans;
2404
2405 out_free_ict:
2406         iwl_pcie_free_ict(trans);
2407 out_free_cmd_pool:
2408         kmem_cache_destroy(trans->dev_cmd_pool);
2409 out_pci_disable_msi:
2410         pci_disable_msi(pdev);
2411 out_pci_release_regions:
2412         pci_release_regions(pdev);
2413 out_pci_disable_device:
2414         pci_disable_device(pdev);
2415 out_no_pci:
2416         kfree(trans);
2417 out:
2418         return ERR_PTR(err);
2419 }