SAFE public projects git trees. - safe/jmp/linux-2.6/blob - drivers/net/wireless/iwlwifi/iwl-4965.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2008 Intel Corporation. All rights reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of version 2 of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along with
  15  * this program; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  17  *
  18  * The full GNU General Public License is included in this distribution in the
  19  * file called LICENSE.
  20  *
  21  * Contact Information:
  22  * James P. Ketrenos <ipw2100-admin@linux.intel.com>
  23  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  24  *
  25  *****************************************************************************/
  26
  27 #include <linux/kernel.h>
  28 #include <linux/module.h>
  29 #include <linux/version.h>
  30 #include <linux/init.h>
  31 #include <linux/pci.h>
  32 #include <linux/dma-mapping.h>
  33 #include <linux/delay.h>
  34 #include <linux/skbuff.h>
  35 #include <linux/netdevice.h>
  36 #include <linux/wireless.h>
  37 #include <net/mac80211.h>
  38 #include <linux/etherdevice.h>
  39 #include <asm/unaligned.h>
  40
  41 #include "iwl-eeprom.h"
  42 #include "iwl-dev.h"
  43 #include "iwl-core.h"
  44 #include "iwl-io.h"
  45 #include "iwl-helpers.h"
  46 #include "iwl-calib.h"
  47 #include "iwl-sta.h"
  48
  49 static int iwl4965_send_tx_power(struct iwl_priv *priv);
  50
  51 /* module parameters */
  52 static struct iwl_mod_params iwl4965_mod_params = {
  53         .num_of_queues = IWL49_NUM_QUEUES,
  54         .enable_qos = 1,
  55         .amsdu_size_8K = 1,
  56         .restart_fw = 1,
  57         /* the rest are 0 by default */
  58 };
  59
  60 /* check contents of special bootstrap uCode SRAM */
  61 static int iwl4965_verify_bsm(struct iwl_priv *priv)
  62 {
  63         __le32 *image = priv->ucode_boot.v_addr;
  64         u32 len = priv->ucode_boot.len;
  65         u32 reg;
  66         u32 val;
  67
  68         IWL_DEBUG_INFO("Begin verify bsm\n");
  69
  70         /* verify BSM SRAM contents */
  71         val = iwl_read_prph(priv, BSM_WR_DWCOUNT_REG);
  72         for (reg = BSM_SRAM_LOWER_BOUND;
  73              reg < BSM_SRAM_LOWER_BOUND + len;
  74              reg += sizeof(u32), image++) {
  75                 val = iwl_read_prph(priv, reg);
  76                 if (val != le32_to_cpu(*image)) {
  77                         IWL_ERROR("BSM uCode verification failed at "
  78                                   "addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n",
  79                                   BSM_SRAM_LOWER_BOUND,
  80                                   reg - BSM_SRAM_LOWER_BOUND, len,
  81                                   val, le32_to_cpu(*image));
  82                         return -EIO;
  83                 }
  84         }
  85
  86         IWL_DEBUG_INFO("BSM bootstrap uCode image OK\n");
  87
  88         return 0;
  89 }
  90
  91 /**
  92  * iwl4965_load_bsm - Load bootstrap instructions
  93  *
  94  * BSM operation:
  95  *
  96  * The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
  97  * in special SRAM that does not power down during RFKILL.  When powering back
  98  * up after power-saving sleeps (or during initial uCode load), the BSM loads
  99  * the bootstrap program into the on-board processor, and starts it.
 100  *
 101  * The bootstrap program loads (via DMA) instructions and data for a new
 102  * program from host DRAM locations indicated by the host driver in the
 103  * BSM_DRAM_* registers.  Once the new program is loaded, it starts
 104  * automatically.
 105  *
 106  * When initializing the NIC, the host driver points the BSM to the
 107  * "initialize" uCode image.  This uCode sets up some internal data, then
 108  * notifies host via "initialize alive" that it is complete.
 109  *
 110  * The host then replaces the BSM_DRAM_* pointer values to point to the
 111  * normal runtime uCode instructions and a backup uCode data cache buffer
 112  * (filled initially with starting data values for the on-board processor),
 113  * then triggers the "initialize" uCode to load and launch the runtime uCode,
 114  * which begins normal operation.
 115  *
 116  * When doing a power-save shutdown, runtime uCode saves data SRAM into
 117  * the backup data cache in DRAM before SRAM is powered down.
 118  *
 119  * When powering back up, the BSM loads the bootstrap program.  This reloads
 120  * the runtime uCode instructions and the backup data cache into SRAM,
 121  * and re-launches the runtime uCode from where it left off.
 122  */
 123 static int iwl4965_load_bsm(struct iwl_priv *priv)
 124 {
 125         __le32 *image = priv->ucode_boot.v_addr;
 126         u32 len = priv->ucode_boot.len;
 127         dma_addr_t pinst;
 128         dma_addr_t pdata;
 129         u32 inst_len;
 130         u32 data_len;
 131         int i;
 132         u32 done;
 133         u32 reg_offset;
 134         int ret;
 135
 136         IWL_DEBUG_INFO("Begin load bsm\n");
 137
 138         priv->ucode_type = UCODE_RT;
 139
 140         /* make sure bootstrap program is no larger than BSM's SRAM size */
 141         if (len > IWL_MAX_BSM_SIZE)
 142                 return -EINVAL;
 143
 144         /* Tell bootstrap uCode where to find the "Initialize" uCode
 145          *   in host DRAM ... host DRAM physical address bits 35:4 for 4965.
 146          * NOTE:  iwl_init_alive_start() will replace these values,
 147          *        after the "initialize" uCode has run, to point to
 148          *        runtime/protocol instructions and backup data cache.
 149          */
 150         pinst = priv->ucode_init.p_addr >> 4;
 151         pdata = priv->ucode_init_data.p_addr >> 4;
 152         inst_len = priv->ucode_init.len;
 153         data_len = priv->ucode_init_data.len;
 154
 155         ret = iwl_grab_nic_access(priv);
 156         if (ret)
 157                 return ret;
 158
 159         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
 160         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
 161         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG, inst_len);
 162         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG, data_len);
 163
 164         /* Fill BSM memory with bootstrap instructions */
 165         for (reg_offset = BSM_SRAM_LOWER_BOUND;
 166              reg_offset < BSM_SRAM_LOWER_BOUND + len;
 167              reg_offset += sizeof(u32), image++)
 168                 _iwl_write_prph(priv, reg_offset, le32_to_cpu(*image));
 169
 170         ret = iwl4965_verify_bsm(priv);
 171         if (ret) {
 172                 iwl_release_nic_access(priv);
 173                 return ret;
 174         }
 175
 176         /* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */
 177         iwl_write_prph(priv, BSM_WR_MEM_SRC_REG, 0x0);
 178         iwl_write_prph(priv, BSM_WR_MEM_DST_REG, RTC_INST_LOWER_BOUND);
 179         iwl_write_prph(priv, BSM_WR_DWCOUNT_REG, len / sizeof(u32));
 180
 181         /* Load bootstrap code into instruction SRAM now,
 182          *   to prepare to load "initialize" uCode */
 183         iwl_write_prph(priv, BSM_WR_CTRL_REG, BSM_WR_CTRL_REG_BIT_START);
 184
 185         /* Wait for load of bootstrap uCode to finish */
 186         for (i = 0; i < 100; i++) {
 187                 done = iwl_read_prph(priv, BSM_WR_CTRL_REG);
 188                 if (!(done & BSM_WR_CTRL_REG_BIT_START))
 189                         break;
 190                 udelay(10);
 191         }
 192         if (i < 100)
 193                 IWL_DEBUG_INFO("BSM write complete, poll %d iterations\n", i);
 194         else {
 195                 IWL_ERROR("BSM write did not complete!\n");
 196                 return -EIO;
 197         }
 198
 199         /* Enable future boot loads whenever power management unit triggers it
 200          *   (e.g. when powering back up after power-save shutdown) */
 201         iwl_write_prph(priv, BSM_WR_CTRL_REG, BSM_WR_CTRL_REG_BIT_START_EN);
 202
 203         iwl_release_nic_access(priv);
 204
 205         return 0;
 206 }
 207
 208 /**
 209  * iwl4965_set_ucode_ptrs - Set uCode address location
 210  *
 211  * Tell initialization uCode where to find runtime uCode.
 212  *
 213  * BSM registers initially contain pointers to initialization uCode.
 214  * We need to replace them to load runtime uCode inst and data,
 215  * and to save runtime data when powering down.
 216  */
 217 static int iwl4965_set_ucode_ptrs(struct iwl_priv *priv)
 218 {
 219         dma_addr_t pinst;
 220         dma_addr_t pdata;
 221         unsigned long flags;
 222         int ret = 0;
 223
 224         /* bits 35:4 for 4965 */
 225         pinst = priv->ucode_code.p_addr >> 4;
 226         pdata = priv->ucode_data_backup.p_addr >> 4;
 227
 228         spin_lock_irqsave(&priv->lock, flags);
 229         ret = iwl_grab_nic_access(priv);
 230         if (ret) {
 231                 spin_unlock_irqrestore(&priv->lock, flags);
 232                 return ret;
 233         }
 234
 235         /* Tell bootstrap uCode where to find image to load */
 236         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
 237         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
 238         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
 239                                  priv->ucode_data.len);
 240
 241         /* Inst bytecount must be last to set up, bit 31 signals uCode
 242          *   that all new ptr/size info is in place */
 243         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
 244                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
 245         iwl_release_nic_access(priv);
 246
 247         spin_unlock_irqrestore(&priv->lock, flags);
 248
 249         IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
 250
 251         return ret;
 252 }
 253
 254 /**
 255  * iwl4965_init_alive_start - Called after REPLY_ALIVE notification received
 256  *
 257  * Called after REPLY_ALIVE notification received from "initialize" uCode.
 258  *
 259  * The 4965 "initialize" ALIVE reply contains calibration data for:
 260  *   Voltage, temperature, and MIMO tx gain correction, now stored in priv
 261  *   (3945 does not contain this data).
 262  *
 263  * Tell "initialize" uCode to go ahead and load the runtime uCode.
 264 */
 265 static void iwl4965_init_alive_start(struct iwl_priv *priv)
 266 {
 267         /* Check alive response for "valid" sign from uCode */
 268         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
 269                 /* We had an error bringing up the hardware, so take it
 270                  * all the way back down so we can try again */
 271                 IWL_DEBUG_INFO("Initialize Alive failed.\n");
 272                 goto restart;
 273         }
 274
 275         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
 276          * This is a paranoid check, because we would not have gotten the
 277          * "initialize" alive if code weren't properly loaded.  */
 278         if (iwl_verify_ucode(priv)) {
 279                 /* Runtime instruction load was bad;
 280                  * take it all the way back down so we can try again */
 281                 IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
 282                 goto restart;
 283         }
 284
 285         /* Calculate temperature */
 286         priv->temperature = iwl4965_get_temperature(priv);
 287
 288         /* Send pointers to protocol/runtime uCode image ... init code will
 289          * load and launch runtime uCode, which will send us another "Alive"
 290          * notification. */
 291         IWL_DEBUG_INFO("Initialization Alive received.\n");
 292         if (iwl4965_set_ucode_ptrs(priv)) {
 293                 /* Runtime instruction load won't happen;
 294                  * take it all the way back down so we can try again */
 295                 IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
 296                 goto restart;
 297         }
 298         return;
 299
 300 restart:
 301         queue_work(priv->workqueue, &priv->restart);
 302 }
 303
 304 static int is_fat_channel(__le32 rxon_flags)
 305 {
 306         return (rxon_flags & RXON_FLG_CHANNEL_MODE_PURE_40_MSK) ||
 307                 (rxon_flags & RXON_FLG_CHANNEL_MODE_MIXED_MSK);
 308 }
 309
 310 /*
 311  * EEPROM handlers
 312  */
 313
 314 static int iwl4965_eeprom_check_version(struct iwl_priv *priv)
 315 {
 316         u16 eeprom_ver;
 317         u16 calib_ver;
 318
 319         eeprom_ver = iwl_eeprom_query16(priv, EEPROM_VERSION);
 320
 321         calib_ver = iwl_eeprom_query16(priv, EEPROM_4965_CALIB_VERSION_OFFSET);
 322
 323         if (eeprom_ver < EEPROM_4965_EEPROM_VERSION ||
 324             calib_ver < EEPROM_4965_TX_POWER_VERSION)
 325                 goto err;
 326
 327         return 0;
 328 err:
 329         IWL_ERROR("Unsuported EEPROM VER=0x%x < 0x%x CALIB=0x%x < 0x%x\n",
 330                   eeprom_ver, EEPROM_4965_EEPROM_VERSION,
 331                   calib_ver, EEPROM_4965_TX_POWER_VERSION);
 332         return -EINVAL;
 333
 334 }
 335 int iwl4965_set_pwr_src(struct iwl_priv *priv, enum iwl_pwr_src src)
 336 {
 337         int ret;
 338         unsigned long flags;
 339
 340         spin_lock_irqsave(&priv->lock, flags);
 341         ret = iwl_grab_nic_access(priv);
 342         if (ret) {
 343                 spin_unlock_irqrestore(&priv->lock, flags);
 344                 return ret;
 345         }
 346
 347         if (src == IWL_PWR_SRC_VAUX) {
 348                 u32 val;
 349                 ret = pci_read_config_dword(priv->pci_dev, PCI_POWER_SOURCE,
 350                                             &val);
 351
 352                 if (val & PCI_CFG_PMC_PME_FROM_D3COLD_SUPPORT) {
 353                         iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
 354                                                APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
 355                                                ~APMG_PS_CTRL_MSK_PWR_SRC);
 356                 }
 357         } else {
 358                 iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
 359                                        APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
 360                                        ~APMG_PS_CTRL_MSK_PWR_SRC);
 361         }
 362
 363         iwl_release_nic_access(priv);
 364         spin_unlock_irqrestore(&priv->lock, flags);
 365
 366         return ret;
 367 }
 368
 369 /*
 370  * Activate/Deactivat Tx DMA/FIFO channels according tx fifos mask
 371  * must be called under priv->lock and mac access
 372  */
 373 static void iwl4965_txq_set_sched(struct iwl_priv *priv, u32 mask)
 374 {
 375         iwl_write_prph(priv, IWL49_SCD_TXFACT, mask);
 376 }
 377
 378 static int iwl4965_apm_init(struct iwl_priv *priv)
 379 {
 380         int ret = 0;
 381
 382         iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
 383                           CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
 384
 385         /* disable L0s without affecting L1 :don't wait for ICH L0s bug W/A) */
 386         iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
 387                           CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
 388
 389         /* set "initialization complete" bit to move adapter
 390          * D0U* --> D0A* state */
 391         iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
 392
 393         /* wait for clock stabilization */
 394         ret = iwl_poll_bit(priv, CSR_GP_CNTRL,
 395                            CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
 396                            CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
 397         if (ret < 0) {
 398                 IWL_DEBUG_INFO("Failed to init the card\n");
 399                 goto out;
 400         }
 401
 402         ret = iwl_grab_nic_access(priv);
 403         if (ret)
 404                 goto out;
 405
 406         /* enable DMA */
 407         iwl_write_prph(priv, APMG_CLK_CTRL_REG, APMG_CLK_VAL_DMA_CLK_RQT |
 408                                                 APMG_CLK_VAL_BSM_CLK_RQT);
 409
 410         udelay(20);
 411
 412         /* disable L1-Active */
 413         iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
 414                           APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
 415
 416         iwl_release_nic_access(priv);
 417 out:
 418         return ret;
 419 }
 420
 421
 422 static void iwl4965_nic_config(struct iwl_priv *priv)
 423 {
 424         unsigned long flags;
 425         u32 val;
 426         u16 radio_cfg;
 427         u8 val_link;
 428
 429         spin_lock_irqsave(&priv->lock, flags);
 430
 431         if ((priv->rev_id & 0x80) == 0x80 && (priv->rev_id & 0x7f) < 8) {
 432                 pci_read_config_dword(priv->pci_dev, PCI_REG_WUM8, &val);
 433                 /* Enable No Snoop field */
 434                 pci_write_config_dword(priv->pci_dev, PCI_REG_WUM8,
 435                                        val & ~(1 << 11));
 436         }
 437
 438         pci_read_config_byte(priv->pci_dev, PCI_LINK_CTRL, &val_link);
 439
 440         /* L1 is enabled by BIOS */
 441         if ((val_link & PCI_LINK_VAL_L1_EN) == PCI_LINK_VAL_L1_EN)
 442                 /* diable L0S disabled L1A enabled */
 443                 iwl_set_bit(priv, CSR_GIO_REG, CSR_GIO_REG_VAL_L0S_ENABLED);
 444         else
 445                 /* L0S enabled L1A disabled */
 446                 iwl_clear_bit(priv, CSR_GIO_REG, CSR_GIO_REG_VAL_L0S_ENABLED);
 447
 448         radio_cfg = iwl_eeprom_query16(priv, EEPROM_RADIO_CONFIG);
 449
 450         /* write radio config values to register */
 451         if (EEPROM_RF_CFG_TYPE_MSK(radio_cfg) == EEPROM_4965_RF_CFG_TYPE_MAX)
 452                 iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
 453                             EEPROM_RF_CFG_TYPE_MSK(radio_cfg) |
 454                             EEPROM_RF_CFG_STEP_MSK(radio_cfg) |
 455                             EEPROM_RF_CFG_DASH_MSK(radio_cfg));
 456
 457         /* set CSR_HW_CONFIG_REG for uCode use */
 458         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
 459                     CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI |
 460                     CSR_HW_IF_CONFIG_REG_BIT_MAC_SI);
 461
 462         priv->calib_info = (struct iwl_eeprom_calib_info *)
 463                 iwl_eeprom_query_addr(priv, EEPROM_4965_CALIB_TXPOWER_OFFSET);
 464
 465         spin_unlock_irqrestore(&priv->lock, flags);
 466 }
 467
 468 static int iwl4965_apm_stop_master(struct iwl_priv *priv)
 469 {
 470         int ret = 0;
 471         unsigned long flags;
 472
 473         spin_lock_irqsave(&priv->lock, flags);
 474
 475         /* set stop master bit */
 476         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
 477
 478         ret = iwl_poll_bit(priv, CSR_RESET,
 479                                   CSR_RESET_REG_FLAG_MASTER_DISABLED,
 480                                   CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
 481         if (ret < 0)
 482                 goto out;
 483
 484 out:
 485         spin_unlock_irqrestore(&priv->lock, flags);
 486         IWL_DEBUG_INFO("stop master\n");
 487
 488         return ret;
 489 }
 490
 491 static void iwl4965_apm_stop(struct iwl_priv *priv)
 492 {
 493         unsigned long flags;
 494
 495         iwl4965_apm_stop_master(priv);
 496
 497         spin_lock_irqsave(&priv->lock, flags);
 498
 499         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
 500
 501         udelay(10);
 502
 503         iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
 504         spin_unlock_irqrestore(&priv->lock, flags);
 505 }
 506
 507 static int iwl4965_apm_reset(struct iwl_priv *priv)
 508 {
 509         int ret = 0;
 510         unsigned long flags;
 511
 512         iwl4965_apm_stop_master(priv);
 513
 514         spin_lock_irqsave(&priv->lock, flags);
 515
 516         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
 517
 518         udelay(10);
 519
 520         /* FIXME: put here L1A -L0S w/a */
 521
 522         iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
 523
 524         ret = iwl_poll_bit(priv, CSR_RESET,
 525                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
 526                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25);
 527
 528         if (ret)
 529                 goto out;
 530
 531         udelay(10);
 532
 533         ret = iwl_grab_nic_access(priv);
 534         if (ret)
 535                 goto out;
 536         /* Enable DMA and BSM Clock */
 537         iwl_write_prph(priv, APMG_CLK_EN_REG, APMG_CLK_VAL_DMA_CLK_RQT |
 538                                               APMG_CLK_VAL_BSM_CLK_RQT);
 539
 540         udelay(10);
 541
 542         /* disable L1A */
 543         iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
 544                           APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
 545
 546         iwl_release_nic_access(priv);
 547
 548         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
 549         wake_up_interruptible(&priv->wait_command_queue);
 550
 551 out:
 552         spin_unlock_irqrestore(&priv->lock, flags);
 553
 554         return ret;
 555 }
 556
 557 #define REG_RECALIB_PERIOD (60)
 558
 559 /* Reset differential Rx gains in NIC to prepare for chain noise calibration.
 560  * Called after every association, but this runs only once!
 561  *  ... once chain noise is calibrated the first time, it's good forever.  */
 562 static void iwl4965_chain_noise_reset(struct iwl_priv *priv)
 563 {
 564         struct iwl_chain_noise_data *data = &(priv->chain_noise_data);
 565
 566         if ((data->state == IWL_CHAIN_NOISE_ALIVE) && iwl_is_associated(priv)) {
 567                 struct iwl4965_calibration_cmd cmd;
 568
 569                 memset(&cmd, 0, sizeof(cmd));
 570                 cmd.opCode = PHY_CALIBRATE_DIFF_GAIN_CMD;
 571                 cmd.diff_gain_a = 0;
 572                 cmd.diff_gain_b = 0;
 573                 cmd.diff_gain_c = 0;
 574                 if (iwl_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD,
 575                                  sizeof(cmd), &cmd))
 576                         IWL_ERROR("Could not send REPLY_PHY_CALIBRATION_CMD\n");
 577                 data->state = IWL_CHAIN_NOISE_ACCUMULATE;
 578                 IWL_DEBUG_CALIB("Run chain_noise_calibrate\n");
 579         }
 580 }
 581
 582 static void iwl4965_gain_computation(struct iwl_priv *priv,
 583                 u32 *average_noise,
 584                 u16 min_average_noise_antenna_i,
 585                 u32 min_average_noise)
 586 {
 587         int i, ret;
 588         struct iwl_chain_noise_data *data = &priv->chain_noise_data;
 589
 590         data->delta_gain_code[min_average_noise_antenna_i] = 0;
 591
 592         for (i = 0; i < NUM_RX_CHAINS; i++) {
 593                 s32 delta_g = 0;
 594
 595                 if (!(data->disconn_array[i]) &&
 596                     (data->delta_gain_code[i] ==
 597                              CHAIN_NOISE_DELTA_GAIN_INIT_VAL)) {
 598                         delta_g = average_noise[i] - min_average_noise;
 599                         data->delta_gain_code[i] = (u8)((delta_g * 10) / 15);
 600                         data->delta_gain_code[i] =
 601                                 min(data->delta_gain_code[i],
 602                                 (u8) CHAIN_NOISE_MAX_DELTA_GAIN_CODE);
 603
 604                         data->delta_gain_code[i] =
 605                                 (data->delta_gain_code[i] | (1 << 2));
 606                 } else {
 607                         data->delta_gain_code[i] = 0;
 608                 }
 609         }
 610         IWL_DEBUG_CALIB("delta_gain_codes: a %d b %d c %d\n",
 611                      data->delta_gain_code[0],
 612                      data->delta_gain_code[1],
 613                      data->delta_gain_code[2]);
 614
 615         /* Differential gain gets sent to uCode only once */
 616         if (!data->radio_write) {
 617                 struct iwl4965_calibration_cmd cmd;
 618                 data->radio_write = 1;
 619
 620                 memset(&cmd, 0, sizeof(cmd));
 621                 cmd.opCode = PHY_CALIBRATE_DIFF_GAIN_CMD;
 622                 cmd.diff_gain_a = data->delta_gain_code[0];
 623                 cmd.diff_gain_b = data->delta_gain_code[1];
 624                 cmd.diff_gain_c = data->delta_gain_code[2];
 625                 ret = iwl_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD,
 626                                       sizeof(cmd), &cmd);
 627                 if (ret)
 628                         IWL_DEBUG_CALIB("fail sending cmd "
 629                                      "REPLY_PHY_CALIBRATION_CMD \n");
 630
 631                 /* TODO we might want recalculate
 632                  * rx_chain in rxon cmd */
 633
 634                 /* Mark so we run this algo only once! */
 635                 data->state = IWL_CHAIN_NOISE_CALIBRATED;
 636         }
 637         data->chain_noise_a = 0;
 638         data->chain_noise_b = 0;
 639         data->chain_noise_c = 0;
 640         data->chain_signal_a = 0;
 641         data->chain_signal_b = 0;
 642         data->chain_signal_c = 0;
 643         data->beacon_count = 0;
 644 }
 645
 646 static void iwl4965_bg_txpower_work(struct work_struct *work)
 647 {
 648         struct iwl_priv *priv = container_of(work, struct iwl_priv,
 649                         txpower_work);
 650
 651         /* If a scan happened to start before we got here
 652          * then just return; the statistics notification will
 653          * kick off another scheduled work to compensate for
 654          * any temperature delta we missed here. */
 655         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
 656             test_bit(STATUS_SCANNING, &priv->status))
 657                 return;
 658
 659         mutex_lock(&priv->mutex);
 660
 661         /* Regardless of if we are assocaited, we must reconfigure the
 662          * TX power since frames can be sent on non-radar channels while
 663          * not associated */
 664         iwl4965_send_tx_power(priv);
 665
 666         /* Update last_temperature to keep is_calib_needed from running
 667          * when it isn't needed... */
 668         priv->last_temperature = priv->temperature;
 669
 670         mutex_unlock(&priv->mutex);
 671 }
 672
 673 /*
 674  * Acquire priv->lock before calling this function !
 675  */
 676 static void iwl4965_set_wr_ptrs(struct iwl_priv *priv, int txq_id, u32 index)
 677 {
 678         iwl_write_direct32(priv, HBUS_TARG_WRPTR,
 679                              (index & 0xff) | (txq_id << 8));
 680         iwl_write_prph(priv, IWL49_SCD_QUEUE_RDPTR(txq_id), index);
 681 }
 682
 683 /**
 684  * iwl4965_tx_queue_set_status - (optionally) start Tx/Cmd queue
 685  * @tx_fifo_id: Tx DMA/FIFO channel (range 0-7) that the queue will feed
 686  * @scd_retry: (1) Indicates queue will be used in aggregation mode
 687  *
 688  * NOTE:  Acquire priv->lock before calling this function !
 689  */
 690 static void iwl4965_tx_queue_set_status(struct iwl_priv *priv,
 691                                         struct iwl_tx_queue *txq,
 692                                         int tx_fifo_id, int scd_retry)
 693 {
 694         int txq_id = txq->q.id;
 695
 696         /* Find out whether to activate Tx queue */
 697         int active = test_bit(txq_id, &priv->txq_ctx_active_msk)?1:0;
 698
 699         /* Set up and activate */
 700         iwl_write_prph(priv, IWL49_SCD_QUEUE_STATUS_BITS(txq_id),
 701                          (active << IWL49_SCD_QUEUE_STTS_REG_POS_ACTIVE) |
 702                          (tx_fifo_id << IWL49_SCD_QUEUE_STTS_REG_POS_TXF) |
 703                          (scd_retry << IWL49_SCD_QUEUE_STTS_REG_POS_WSL) |
 704                          (scd_retry << IWL49_SCD_QUEUE_STTS_REG_POS_SCD_ACK) |
 705                          IWL49_SCD_QUEUE_STTS_REG_MSK);
 706
 707         txq->sched_retry = scd_retry;
 708
 709         IWL_DEBUG_INFO("%s %s Queue %d on AC %d\n",
 710                        active ? "Activate" : "Deactivate",
 711                        scd_retry ? "BA" : "AC", txq_id, tx_fifo_id);
 712 }
 713
 714 static const u16 default_queue_to_tx_fifo[] = {
 715         IWL_TX_FIFO_AC3,
 716         IWL_TX_FIFO_AC2,
 717         IWL_TX_FIFO_AC1,
 718         IWL_TX_FIFO_AC0,
 719         IWL49_CMD_FIFO_NUM,
 720         IWL_TX_FIFO_HCCA_1,
 721         IWL_TX_FIFO_HCCA_2
 722 };
 723
 724 int iwl4965_alive_notify(struct iwl_priv *priv)
 725 {
 726         u32 a;
 727         int i = 0;
 728         unsigned long flags;
 729         int ret;
 730
 731         spin_lock_irqsave(&priv->lock, flags);
 732
 733         ret = iwl_grab_nic_access(priv);
 734         if (ret) {
 735                 spin_unlock_irqrestore(&priv->lock, flags);
 736                 return ret;
 737         }
 738
 739         /* Clear 4965's internal Tx Scheduler data base */
 740         priv->scd_base_addr = iwl_read_prph(priv, IWL49_SCD_SRAM_BASE_ADDR);
 741         a = priv->scd_base_addr + IWL49_SCD_CONTEXT_DATA_OFFSET;
 742         for (; a < priv->scd_base_addr + IWL49_SCD_TX_STTS_BITMAP_OFFSET; a += 4)
 743                 iwl_write_targ_mem(priv, a, 0);
 744         for (; a < priv->scd_base_addr + IWL49_SCD_TRANSLATE_TBL_OFFSET; a += 4)
 745                 iwl_write_targ_mem(priv, a, 0);
 746         for (; a < sizeof(u16) * priv->hw_params.max_txq_num; a += 4)
 747                 iwl_write_targ_mem(priv, a, 0);
 748
 749         /* Tel 4965 where to find Tx byte count tables */
 750         iwl_write_prph(priv, IWL49_SCD_DRAM_BASE_ADDR,
 751                 (priv->shared_phys +
 752                  offsetof(struct iwl4965_shared, queues_byte_cnt_tbls)) >> 10);
 753
 754         /* Disable chain mode for all queues */
 755         iwl_write_prph(priv, IWL49_SCD_QUEUECHAIN_SEL, 0);
 756
 757         /* Initialize each Tx queue (including the command queue) */
 758         for (i = 0; i < priv->hw_params.max_txq_num; i++) {
 759
 760                 /* TFD circular buffer read/write indexes */
 761                 iwl_write_prph(priv, IWL49_SCD_QUEUE_RDPTR(i), 0);
 762                 iwl_write_direct32(priv, HBUS_TARG_WRPTR, 0 | (i << 8));
 763
 764                 /* Max Tx Window size for Scheduler-ACK mode */
 765                 iwl_write_targ_mem(priv, priv->scd_base_addr +
 766                                 IWL49_SCD_CONTEXT_QUEUE_OFFSET(i),
 767                                 (SCD_WIN_SIZE <<
 768                                 IWL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) &
 769                                 IWL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
 770
 771                 /* Frame limit */
 772                 iwl_write_targ_mem(priv, priv->scd_base_addr +
 773                                 IWL49_SCD_CONTEXT_QUEUE_OFFSET(i) +
 774                                 sizeof(u32),
 775                                 (SCD_FRAME_LIMIT <<
 776                                 IWL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) &
 777                                 IWL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
 778
 779         }
 780         iwl_write_prph(priv, IWL49_SCD_INTERRUPT_MASK,
 781                                  (1 << priv->hw_params.max_txq_num) - 1);
 782
 783         /* Activate all Tx DMA/FIFO channels */
 784         priv->cfg->ops->lib->txq_set_sched(priv, IWL_MASK(0, 7));
 785
 786         iwl4965_set_wr_ptrs(priv, IWL_CMD_QUEUE_NUM, 0);
 787
 788         /* Map each Tx/cmd queue to its corresponding fifo */
 789         for (i = 0; i < ARRAY_SIZE(default_queue_to_tx_fifo); i++) {
 790                 int ac = default_queue_to_tx_fifo[i];
 791                 iwl_txq_ctx_activate(priv, i);
 792                 iwl4965_tx_queue_set_status(priv, &priv->txq[i], ac, 0);
 793         }
 794
 795         iwl_release_nic_access(priv);
 796         spin_unlock_irqrestore(&priv->lock, flags);
 797
 798         return ret;
 799 }
 800
 801 static struct iwl_sensitivity_ranges iwl4965_sensitivity = {
 802         .min_nrg_cck = 97,
 803         .max_nrg_cck = 0,
 804
 805         .auto_corr_min_ofdm = 85,
 806         .auto_corr_min_ofdm_mrc = 170,
 807         .auto_corr_min_ofdm_x1 = 105,
 808         .auto_corr_min_ofdm_mrc_x1 = 220,
 809
 810         .auto_corr_max_ofdm = 120,
 811         .auto_corr_max_ofdm_mrc = 210,
 812         .auto_corr_max_ofdm_x1 = 140,
 813         .auto_corr_max_ofdm_mrc_x1 = 270,
 814
 815         .auto_corr_min_cck = 125,
 816         .auto_corr_max_cck = 200,
 817         .auto_corr_min_cck_mrc = 200,
 818         .auto_corr_max_cck_mrc = 400,
 819
 820         .nrg_th_cck = 100,
 821         .nrg_th_ofdm = 100,
 822 };
 823
 824 /**
 825  * iwl4965_hw_set_hw_params
 826  *
 827  * Called when initializing driver
 828  */
 829 int iwl4965_hw_set_hw_params(struct iwl_priv *priv)
 830 {
 831
 832         if ((priv->cfg->mod_params->num_of_queues > IWL49_NUM_QUEUES) ||
 833             (priv->cfg->mod_params->num_of_queues < IWL_MIN_NUM_QUEUES)) {
 834                 IWL_ERROR("invalid queues_num, should be between %d and %d\n",
 835                           IWL_MIN_NUM_QUEUES, IWL49_NUM_QUEUES);
 836                 return -EINVAL;
 837         }
 838
 839         priv->hw_params.max_txq_num = priv->cfg->mod_params->num_of_queues;
 840         priv->hw_params.first_ampdu_q = IWL49_FIRST_AMPDU_QUEUE;
 841         priv->hw_params.sw_crypto = priv->cfg->mod_params->sw_crypto;
 842         priv->hw_params.max_rxq_size = RX_QUEUE_SIZE;
 843         priv->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG;
 844         if (priv->cfg->mod_params->amsdu_size_8K)
 845                 priv->hw_params.rx_buf_size = IWL_RX_BUF_SIZE_8K;
 846         else
 847                 priv->hw_params.rx_buf_size = IWL_RX_BUF_SIZE_4K;
 848         priv->hw_params.max_pkt_size = priv->hw_params.rx_buf_size - 256;
 849         priv->hw_params.max_stations = IWL4965_STATION_COUNT;
 850         priv->hw_params.bcast_sta_id = IWL4965_BROADCAST_ID;
 851
 852         priv->hw_params.max_data_size = IWL49_RTC_DATA_SIZE;
 853         priv->hw_params.max_inst_size = IWL49_RTC_INST_SIZE;
 854         priv->hw_params.max_bsm_size = BSM_SRAM_SIZE;
 855         priv->hw_params.fat_channel = BIT(IEEE80211_BAND_5GHZ);
 856
 857         priv->hw_params.tx_chains_num = 2;
 858         priv->hw_params.rx_chains_num = 2;
 859         priv->hw_params.valid_tx_ant = ANT_A | ANT_B;
 860         priv->hw_params.valid_rx_ant = ANT_A | ANT_B;
 861         priv->hw_params.ct_kill_threshold = CELSIUS_TO_KELVIN(CT_KILL_THRESHOLD);
 862
 863         priv->hw_params.sens = &iwl4965_sensitivity;
 864
 865         return 0;
 866 }
 867
 868 /* set card power command */
 869 static int iwl4965_set_power(struct iwl_priv *priv,
 870                       void *cmd)
 871 {
 872         int ret = 0;
 873
 874         ret = iwl_send_cmd_pdu_async(priv, POWER_TABLE_CMD,
 875                                     sizeof(struct iwl4965_powertable_cmd),
 876                                     cmd, NULL);
 877         return ret;
 878 }
 879
 880 static s32 iwl4965_math_div_round(s32 num, s32 denom, s32 *res)
 881 {
 882         s32 sign = 1;
 883
 884         if (num < 0) {
 885                 sign = -sign;
 886                 num = -num;
 887         }
 888         if (denom < 0) {
 889                 sign = -sign;
 890                 denom = -denom;
 891         }
 892         *res = 1;
 893         *res = ((num * 2 + denom) / (denom * 2)) * sign;
 894
 895         return 1;
 896 }
 897
 898 /**
 899  * iwl4965_get_voltage_compensation - Power supply voltage comp for txpower
 900  *
 901  * Determines power supply voltage compensation for txpower calculations.
 902  * Returns number of 1/2-dB steps to subtract from gain table index,
 903  * to compensate for difference between power supply voltage during
 904  * factory measurements, vs. current power supply voltage.
 905  *
 906  * Voltage indication is higher for lower voltage.
 907  * Lower voltage requires more gain (lower gain table index).
 908  */
 909 static s32 iwl4965_get_voltage_compensation(s32 eeprom_voltage,
 910                                             s32 current_voltage)
 911 {
 912         s32 comp = 0;
 913
 914         if ((TX_POWER_IWL_ILLEGAL_VOLTAGE == eeprom_voltage) ||
 915             (TX_POWER_IWL_ILLEGAL_VOLTAGE == current_voltage))
 916                 return 0;
 917
 918         iwl4965_math_div_round(current_voltage - eeprom_voltage,
 919                                TX_POWER_IWL_VOLTAGE_CODES_PER_03V, &comp);
 920
 921         if (current_voltage > eeprom_voltage)
 922                 comp *= 2;
 923         if ((comp < -2) || (comp > 2))
 924                 comp = 0;
 925
 926         return comp;
 927 }
 928
 929 static s32 iwl4965_get_tx_atten_grp(u16 channel)
 930 {
 931         if (channel >= CALIB_IWL_TX_ATTEN_GR5_FCH &&
 932             channel <= CALIB_IWL_TX_ATTEN_GR5_LCH)
 933                 return CALIB_CH_GROUP_5;
 934
 935         if (channel >= CALIB_IWL_TX_ATTEN_GR1_FCH &&
 936             channel <= CALIB_IWL_TX_ATTEN_GR1_LCH)
 937                 return CALIB_CH_GROUP_1;
 938
 939         if (channel >= CALIB_IWL_TX_ATTEN_GR2_FCH &&
 940             channel <= CALIB_IWL_TX_ATTEN_GR2_LCH)
 941                 return CALIB_CH_GROUP_2;
 942
 943         if (channel >= CALIB_IWL_TX_ATTEN_GR3_FCH &&
 944             channel <= CALIB_IWL_TX_ATTEN_GR3_LCH)
 945                 return CALIB_CH_GROUP_3;
 946
 947         if (channel >= CALIB_IWL_TX_ATTEN_GR4_FCH &&
 948             channel <= CALIB_IWL_TX_ATTEN_GR4_LCH)
 949                 return CALIB_CH_GROUP_4;
 950
 951         IWL_ERROR("Can't find txatten group for channel %d.\n", channel);
 952         return -1;
 953 }
 954
 955 static u32 iwl4965_get_sub_band(const struct iwl_priv *priv, u32 channel)
 956 {
 957         s32 b = -1;
 958
 959         for (b = 0; b < EEPROM_TX_POWER_BANDS; b++) {
 960                 if (priv->calib_info->band_info[b].ch_from == 0)
 961                         continue;
 962
 963                 if ((channel >= priv->calib_info->band_info[b].ch_from)
 964                     && (channel <= priv->calib_info->band_info[b].ch_to))
 965                         break;
 966         }
 967
 968         return b;
 969 }
 970
 971 static s32 iwl4965_interpolate_value(s32 x, s32 x1, s32 y1, s32 x2, s32 y2)
 972 {
 973         s32 val;
 974
 975         if (x2 == x1)
 976                 return y1;
 977         else {
 978                 iwl4965_math_div_round((x2 - x) * (y1 - y2), (x2 - x1), &val);
 979                 return val + y2;
 980         }
 981 }
 982
 983 /**
 984  * iwl4965_interpolate_chan - Interpolate factory measurements for one channel
 985  *
 986  * Interpolates factory measurements from the two sample channels within a
 987  * sub-band, to apply to channel of interest.  Interpolation is proportional to
 988  * differences in channel frequencies, which is proportional to differences
 989  * in channel number.
 990  */
 991 static int iwl4965_interpolate_chan(struct iwl_priv *priv, u32 channel,
 992                                     struct iwl_eeprom_calib_ch_info *chan_info)
 993 {
 994         s32 s = -1;
 995         u32 c;
 996         u32 m;
 997         const struct iwl_eeprom_calib_measure *m1;
 998         const struct iwl_eeprom_calib_measure *m2;
 999         struct iwl_eeprom_calib_measure *omeas;
1000         u32 ch_i1;
1001         u32 ch_i2;
1002
1003         s = iwl4965_get_sub_band(priv, channel);
1004         if (s >= EEPROM_TX_POWER_BANDS) {
1005                 IWL_ERROR("Tx Power can not find channel %d ", channel);
1006                 return -1;
1007         }
1008
1009         ch_i1 = priv->calib_info->band_info[s].ch1.ch_num;
1010         ch_i2 = priv->calib_info->band_info[s].ch2.ch_num;
1011         chan_info->ch_num = (u8) channel;
1012
1013         IWL_DEBUG_TXPOWER("channel %d subband %d factory cal ch %d & %d\n",
1014                           channel, s, ch_i1, ch_i2);
1015
1016         for (c = 0; c < EEPROM_TX_POWER_TX_CHAINS; c++) {
1017                 for (m = 0; m < EEPROM_TX_POWER_MEASUREMENTS; m++) {
1018                         m1 = &(priv->calib_info->band_info[s].ch1.
1019                                measurements[c][m]);
1020                         m2 = &(priv->calib_info->band_info[s].ch2.
1021                                measurements[c][m]);
1022                         omeas = &(chan_info->measurements[c][m]);
1023
1024                         omeas->actual_pow =
1025                             (u8) iwl4965_interpolate_value(channel, ch_i1,
1026                                                            m1->actual_pow,
1027                                                            ch_i2,
1028                                                            m2->actual_pow);
1029                         omeas->gain_idx =
1030                             (u8) iwl4965_interpolate_value(channel, ch_i1,
1031                                                            m1->gain_idx, ch_i2,
1032                                                            m2->gain_idx);
1033                         omeas->temperature =
1034                             (u8) iwl4965_interpolate_value(channel, ch_i1,
1035                                                            m1->temperature,
1036                                                            ch_i2,
1037                                                            m2->temperature);
1038                         omeas->pa_det =
1039                             (s8) iwl4965_interpolate_value(channel, ch_i1,
1040                                                            m1->pa_det, ch_i2,
1041                                                            m2->pa_det);
1042
1043                         IWL_DEBUG_TXPOWER
1044                             ("chain %d meas %d AP1=%d AP2=%d AP=%d\n", c, m,
1045                              m1->actual_pow, m2->actual_pow, omeas->actual_pow);
1046                         IWL_DEBUG_TXPOWER
1047                             ("chain %d meas %d NI1=%d NI2=%d NI=%d\n", c, m,
1048                              m1->gain_idx, m2->gain_idx, omeas->gain_idx);
1049                         IWL_DEBUG_TXPOWER
1050                             ("chain %d meas %d PA1=%d PA2=%d PA=%d\n", c, m,
1051                              m1->pa_det, m2->pa_det, omeas->pa_det);
1052                         IWL_DEBUG_TXPOWER
1053                             ("chain %d meas %d  T1=%d  T2=%d  T=%d\n", c, m,
1054                              m1->temperature, m2->temperature,
1055                              omeas->temperature);
1056                 }
1057         }
1058
1059         return 0;
1060 }
1061
1062 /* bit-rate-dependent table to prevent Tx distortion, in half-dB units,
1063  * for OFDM 6, 12, 18, 24, 36, 48, 54, 60 MBit, and CCK all rates. */
1064 static s32 back_off_table[] = {
1065         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 20 MHz */
1066         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 20 MHz */
1067         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 40 MHz */
1068         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 40 MHz */
1069         10                      /* CCK */
1070 };
1071
1072 /* Thermal compensation values for txpower for various frequency ranges ...
1073  *   ratios from 3:1 to 4.5:1 of degrees (Celsius) per half-dB gain adjust */
1074 static struct iwl4965_txpower_comp_entry {
1075         s32 degrees_per_05db_a;
1076         s32 degrees_per_05db_a_denom;
1077 } tx_power_cmp_tble[CALIB_CH_GROUP_MAX] = {
1078         {9, 2},                 /* group 0 5.2, ch  34-43 */
1079         {4, 1},                 /* group 1 5.2, ch  44-70 */
1080         {4, 1},                 /* group 2 5.2, ch  71-124 */
1081         {4, 1},                 /* group 3 5.2, ch 125-200 */
1082         {3, 1}                  /* group 4 2.4, ch   all */
1083 };
1084
1085 static s32 get_min_power_index(s32 rate_power_index, u32 band)
1086 {
1087         if (!band) {
1088                 if ((rate_power_index & 7) <= 4)
1089                         return MIN_TX_GAIN_INDEX_52GHZ_EXT;
1090         }
1091         return MIN_TX_GAIN_INDEX;
1092 }
1093
1094 struct gain_entry {
1095         u8 dsp;
1096         u8 radio;
1097 };
1098
1099 static const struct gain_entry gain_table[2][108] = {
1100         /* 5.2GHz power gain index table */
1101         {
1102          {123, 0x3F},           /* highest txpower */
1103          {117, 0x3F},
1104          {110, 0x3F},
1105          {104, 0x3F},
1106          {98, 0x3F},
1107          {110, 0x3E},
1108          {104, 0x3E},
1109          {98, 0x3E},
1110          {110, 0x3D},
1111          {104, 0x3D},
1112          {98, 0x3D},
1113          {110, 0x3C},
1114          {104, 0x3C},
1115          {98, 0x3C},
1116          {110, 0x3B},
1117          {104, 0x3B},
1118          {98, 0x3B},
1119          {110, 0x3A},
1120          {104, 0x3A},
1121          {98, 0x3A},
1122          {110, 0x39},
1123          {104, 0x39},
1124          {98, 0x39},
1125          {110, 0x38},
1126          {104, 0x38},
1127          {98, 0x38},
1128          {110, 0x37},
1129          {104, 0x37},
1130          {98, 0x37},
1131          {110, 0x36},
1132          {104, 0x36},
1133          {98, 0x36},
1134          {110, 0x35},
1135          {104, 0x35},
1136          {98, 0x35},
1137          {110, 0x34},
1138          {104, 0x34},
1139          {98, 0x34},
1140          {110, 0x33},
1141          {104, 0x33},
1142          {98, 0x33},
1143          {110, 0x32},
1144          {104, 0x32},
1145          {98, 0x32},
1146          {110, 0x31},
1147          {104, 0x31},
1148          {98, 0x31},
1149          {110, 0x30},
1150          {104, 0x30},
1151          {98, 0x30},
1152          {110, 0x25},
1153          {104, 0x25},
1154          {98, 0x25},
1155          {110, 0x24},
1156          {104, 0x24},
1157          {98, 0x24},
1158          {110, 0x23},
1159          {104, 0x23},
1160          {98, 0x23},
1161          {110, 0x22},
1162          {104, 0x18},
1163          {98, 0x18},
1164          {110, 0x17},
1165          {104, 0x17},
1166          {98, 0x17},
1167          {110, 0x16},
1168          {104, 0x16},
1169          {98, 0x16},
1170          {110, 0x15},
1171          {104, 0x15},
1172          {98, 0x15},
1173          {110, 0x14},
1174          {104, 0x14},
1175          {98, 0x14},
1176          {110, 0x13},
1177          {104, 0x13},
1178          {98, 0x13},
1179          {110, 0x12},
1180          {104, 0x08},
1181          {98, 0x08},
1182          {110, 0x07},
1183          {104, 0x07},
1184          {98, 0x07},
1185          {110, 0x06},
1186          {104, 0x06},
1187          {98, 0x06},
1188          {110, 0x05},
1189          {104, 0x05},
1190          {98, 0x05},
1191          {110, 0x04},
1192          {104, 0x04},
1193          {98, 0x04},
1194          {110, 0x03},
1195          {104, 0x03},
1196          {98, 0x03},
1197          {110, 0x02},
1198          {104, 0x02},
1199          {98, 0x02},
1200          {110, 0x01},
1201          {104, 0x01},
1202          {98, 0x01},
1203          {110, 0x00},
1204          {104, 0x00},
1205          {98, 0x00},
1206          {93, 0x00},
1207          {88, 0x00},
1208          {83, 0x00},
1209          {78, 0x00},
1210          },
1211         /* 2.4GHz power gain index table */
1212         {
1213          {110, 0x3f},           /* highest txpower */
1214          {104, 0x3f},
1215          {98, 0x3f},
1216          {110, 0x3e},
1217          {104, 0x3e},
1218          {98, 0x3e},
1219          {110, 0x3d},
1220          {104, 0x3d},
1221          {98, 0x3d},
1222          {110, 0x3c},
1223          {104, 0x3c},
1224          {98, 0x3c},
1225          {110, 0x3b},
1226          {104, 0x3b},
1227          {98, 0x3b},
1228          {110, 0x3a},
1229          {104, 0x3a},
1230          {98, 0x3a},
1231          {110, 0x39},
1232          {104, 0x39},
1233          {98, 0x39},
1234          {110, 0x38},
1235          {104, 0x38},
1236          {98, 0x38},
1237          {110, 0x37},
1238          {104, 0x37},
1239          {98, 0x37},
1240          {110, 0x36},
1241          {104, 0x36},
1242          {98, 0x36},
1243          {110, 0x35},
1244          {104, 0x35},
1245          {98, 0x35},
1246          {110, 0x34},
1247          {104, 0x34},
1248          {98, 0x34},
1249          {110, 0x33},
1250          {104, 0x33},
1251          {98, 0x33},
1252          {110, 0x32},
1253          {104, 0x32},
1254          {98, 0x32},
1255          {110, 0x31},
1256          {104, 0x31},
1257          {98, 0x31},
1258          {110, 0x30},
1259          {104, 0x30},
1260          {98, 0x30},
1261          {110, 0x6},
1262          {104, 0x6},
1263          {98, 0x6},
1264          {110, 0x5},
1265          {104, 0x5},
1266          {98, 0x5},
1267          {110, 0x4},
1268          {104, 0x4},
1269          {98, 0x4},
1270          {110, 0x3},
1271          {104, 0x3},
1272          {98, 0x3},
1273          {110, 0x2},
1274          {104, 0x2},
1275          {98, 0x2},
1276          {110, 0x1},
1277          {104, 0x1},
1278          {98, 0x1},
1279          {110, 0x0},
1280          {104, 0x0},
1281          {98, 0x0},
1282          {97, 0},
1283          {96, 0},
1284          {95, 0},
1285          {94, 0},
1286          {93, 0},
1287          {92, 0},
1288          {91, 0},
1289          {90, 0},
1290          {89, 0},
1291          {88, 0},
1292          {87, 0},
1293          {86, 0},
1294          {85, 0},
1295          {84, 0},
1296          {83, 0},
1297          {82, 0},
1298          {81, 0},
1299          {80, 0},
1300          {79, 0},
1301          {78, 0},
1302          {77, 0},
1303          {76, 0},
1304          {75, 0},
1305          {74, 0},
1306          {73, 0},
1307          {72, 0},
1308          {71, 0},
1309          {70, 0},
1310          {69, 0},
1311          {68, 0},
1312          {67, 0},
1313          {66, 0},
1314          {65, 0},
1315          {64, 0},
1316          {63, 0},
1317          {62, 0},
1318          {61, 0},
1319          {60, 0},
1320          {59, 0},
1321          }
1322 };
1323
1324 static int iwl4965_fill_txpower_tbl(struct iwl_priv *priv, u8 band, u16 channel,
1325                                     u8 is_fat, u8 ctrl_chan_high,
1326                                     struct iwl4965_tx_power_db *tx_power_tbl)
1327 {
1328         u8 saturation_power;
1329         s32 target_power;
1330         s32 user_target_power;
1331         s32 power_limit;
1332         s32 current_temp;
1333         s32 reg_limit;
1334         s32 current_regulatory;
1335         s32 txatten_grp = CALIB_CH_GROUP_MAX;
1336         int i;
1337         int c;
1338         const struct iwl_channel_info *ch_info = NULL;
1339         struct iwl_eeprom_calib_ch_info ch_eeprom_info;
1340         const struct iwl_eeprom_calib_measure *measurement;
1341         s16 voltage;
1342         s32 init_voltage;
1343         s32 voltage_compensation;
1344         s32 degrees_per_05db_num;
1345         s32 degrees_per_05db_denom;
1346         s32 factory_temp;
1347         s32 temperature_comp[2];
1348         s32 factory_gain_index[2];
1349         s32 factory_actual_pwr[2];
1350         s32 power_index;
1351
1352         /* user_txpower_limit is in dBm, convert to half-dBm (half-dB units
1353          *   are used for indexing into txpower table) */
1354         user_target_power = 2 * priv->tx_power_user_lmt;
1355
1356         /* Get current (RXON) channel, band, width */
1357         IWL_DEBUG_TXPOWER("chan %d band %d is_fat %d\n", channel, band,
1358                           is_fat);
1359
1360         ch_info = iwl_get_channel_info(priv, priv->band, channel);
1361
1362         if (!is_channel_valid(ch_info))
1363                 return -EINVAL;
1364
1365         /* get txatten group, used to select 1) thermal txpower adjustment
1366          *   and 2) mimo txpower balance between Tx chains. */
1367         txatten_grp = iwl4965_get_tx_atten_grp(channel);
1368         if (txatten_grp < 0)
1369                 return -EINVAL;
1370
1371         IWL_DEBUG_TXPOWER("channel %d belongs to txatten group %d\n",
1372                           channel, txatten_grp);
1373
1374         if (is_fat) {
1375                 if (ctrl_chan_high)
1376                         channel -= 2;
1377                 else
1378                         channel += 2;
1379         }
1380
1381         /* hardware txpower limits ...
1382          * saturation (clipping distortion) txpowers are in half-dBm */
1383         if (band)
1384                 saturation_power = priv->calib_info->saturation_power24;
1385         else
1386                 saturation_power = priv->calib_info->saturation_power52;
1387
1388         if (saturation_power < IWL_TX_POWER_SATURATION_MIN ||
1389             saturation_power > IWL_TX_POWER_SATURATION_MAX) {
1390                 if (band)
1391                         saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_24;
1392                 else
1393                         saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_52;
1394         }
1395
1396         /* regulatory txpower limits ... reg_limit values are in half-dBm,
1397          *   max_power_avg values are in dBm, convert * 2 */
1398         if (is_fat)
1399                 reg_limit = ch_info->fat_max_power_avg * 2;
1400         else
1401                 reg_limit = ch_info->max_power_avg * 2;
1402
1403         if ((reg_limit < IWL_TX_POWER_REGULATORY_MIN) ||
1404             (reg_limit > IWL_TX_POWER_REGULATORY_MAX)) {
1405                 if (band)
1406                         reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_24;
1407                 else
1408                         reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_52;
1409         }
1410
1411         /* Interpolate txpower calibration values for this channel,
1412          *   based on factory calibration tests on spaced channels. */
1413         iwl4965_interpolate_chan(priv, channel, &ch_eeprom_info);
1414
1415         /* calculate tx gain adjustment based on power supply voltage */
1416         voltage = priv->calib_info->voltage;
1417         init_voltage = (s32)le32_to_cpu(priv->card_alive_init.voltage);
1418         voltage_compensation =
1419             iwl4965_get_voltage_compensation(voltage, init_voltage);
1420
1421         IWL_DEBUG_TXPOWER("curr volt %d eeprom volt %d volt comp %d\n",
1422                           init_voltage,
1423                           voltage, voltage_compensation);
1424
1425         /* get current temperature (Celsius) */
1426         current_temp = max(priv->temperature, IWL_TX_POWER_TEMPERATURE_MIN);
1427         current_temp = min(priv->temperature, IWL_TX_POWER_TEMPERATURE_MAX);
1428         current_temp = KELVIN_TO_CELSIUS(current_temp);
1429
1430         /* select thermal txpower adjustment params, based on channel group
1431          *   (same frequency group used for mimo txatten adjustment) */
1432         degrees_per_05db_num =
1433             tx_power_cmp_tble[txatten_grp].degrees_per_05db_a;
1434         degrees_per_05db_denom =
1435             tx_power_cmp_tble[txatten_grp].degrees_per_05db_a_denom;
1436
1437         /* get per-chain txpower values from factory measurements */
1438         for (c = 0; c < 2; c++) {
1439                 measurement = &ch_eeprom_info.measurements[c][1];
1440
1441                 /* txgain adjustment (in half-dB steps) based on difference
1442                  *   between factory and current temperature */
1443                 factory_temp = measurement->temperature;
1444                 iwl4965_math_div_round((current_temp - factory_temp) *
1445                                        degrees_per_05db_denom,
1446                                        degrees_per_05db_num,
1447                                        &temperature_comp[c]);
1448
1449                 factory_gain_index[c] = measurement->gain_idx;
1450                 factory_actual_pwr[c] = measurement->actual_pow;
1451
1452                 IWL_DEBUG_TXPOWER("chain = %d\n", c);
1453                 IWL_DEBUG_TXPOWER("fctry tmp %d, "
1454                                   "curr tmp %d, comp %d steps\n",
1455                                   factory_temp, current_temp,
1456                                   temperature_comp[c]);
1457
1458                 IWL_DEBUG_TXPOWER("fctry idx %d, fctry pwr %d\n",
1459                                   factory_gain_index[c],
1460                                   factory_actual_pwr[c]);
1461         }
1462
1463         /* for each of 33 bit-rates (including 1 for CCK) */
1464         for (i = 0; i < POWER_TABLE_NUM_ENTRIES; i++) {
1465                 u8 is_mimo_rate;
1466                 union iwl4965_tx_power_dual_stream tx_power;
1467
1468                 /* for mimo, reduce each chain's txpower by half
1469                  * (3dB, 6 steps), so total output power is regulatory
1470                  * compliant. */
1471                 if (i & 0x8) {
1472                         current_regulatory = reg_limit -
1473                             IWL_TX_POWER_MIMO_REGULATORY_COMPENSATION;
1474                         is_mimo_rate = 1;
1475                 } else {
1476                         current_regulatory = reg_limit;
1477                         is_mimo_rate = 0;
1478                 }
1479
1480                 /* find txpower limit, either hardware or regulatory */
1481                 power_limit = saturation_power - back_off_table[i];
1482                 if (power_limit > current_regulatory)
1483                         power_limit = current_regulatory;
1484
1485                 /* reduce user's txpower request if necessary
1486                  * for this rate on this channel */
1487                 target_power = user_target_power;
1488                 if (target_power > power_limit)
1489                         target_power = power_limit;
1490
1491                 IWL_DEBUG_TXPOWER("rate %d sat %d reg %d usr %d tgt %d\n",
1492                                   i, saturation_power - back_off_table[i],
1493                                   current_regulatory, user_target_power,
1494                                   target_power);
1495
1496                 /* for each of 2 Tx chains (radio transmitters) */
1497                 for (c = 0; c < 2; c++) {
1498                         s32 atten_value;
1499
1500                         if (is_mimo_rate)
1501                                 atten_value =
1502                                     (s32)le32_to_cpu(priv->card_alive_init.
1503                                     tx_atten[txatten_grp][c]);
1504                         else
1505                                 atten_value = 0;
1506
1507                         /* calculate index; higher index means lower txpower */
1508                         power_index = (u8) (factory_gain_index[c] -
1509                                             (target_power -
1510                                              factory_actual_pwr[c]) -
1511                                             temperature_comp[c] -
1512                                             voltage_compensation +
1513                                             atten_value);
1514
1515 /*                      IWL_DEBUG_TXPOWER("calculated txpower index %d\n",
1516                                                 power_index); */
1517
1518                         if (power_index < get_min_power_index(i, band))
1519                                 power_index = get_min_power_index(i, band);
1520
1521                         /* adjust 5 GHz index to support negative indexes */
1522                         if (!band)
1523                                 power_index += 9;
1524
1525                         /* CCK, rate 32, reduce txpower for CCK */
1526                         if (i == POWER_TABLE_CCK_ENTRY)
1527                                 power_index +=
1528                                     IWL_TX_POWER_CCK_COMPENSATION_C_STEP;
1529
1530                         /* stay within the table! */
1531                         if (power_index > 107) {
1532                                 IWL_WARNING("txpower index %d > 107\n",
1533                                             power_index);
1534                                 power_index = 107;
1535                         }
1536                         if (power_index < 0) {
1537                                 IWL_WARNING("txpower index %d < 0\n",
1538                                             power_index);
1539                                 power_index = 0;
1540                         }
1541
1542                         /* fill txpower command for this rate/chain */
1543                         tx_power.s.radio_tx_gain[c] =
1544                                 gain_table[band][power_index].radio;
1545                         tx_power.s.dsp_predis_atten[c] =
1546                                 gain_table[band][power_index].dsp;
1547
1548                         IWL_DEBUG_TXPOWER("chain %d mimo %d index %d "
1549                                           "gain 0x%02x dsp %d\n",
1550                                           c, atten_value, power_index,
1551                                         tx_power.s.radio_tx_gain[c],
1552                                         tx_power.s.dsp_predis_atten[c]);
1553                 }/* for each chain */
1554
1555                 tx_power_tbl->power_tbl[i].dw = cpu_to_le32(tx_power.dw);
1556
1557         }/* for each rate */
1558
1559         return 0;
1560 }
1561
1562 /**
1563  * iwl4965_send_tx_power - Configure the TXPOWER level user limit
1564  *
1565  * Uses the active RXON for channel, band, and characteristics (fat, high)
1566  * The power limit is taken from priv->tx_power_user_lmt.
1567  */
1568 static int iwl4965_send_tx_power(struct iwl_priv *priv)
1569 {
1570         struct iwl4965_txpowertable_cmd cmd = { 0 };
1571         int ret;
1572         u8 band = 0;
1573         u8 is_fat = 0;
1574         u8 ctrl_chan_high = 0;
1575
1576         if (test_bit(STATUS_SCANNING, &priv->status)) {
1577                 /* If this gets hit a lot, switch it to a BUG() and catch
1578                  * the stack trace to find out who is calling this during
1579                  * a scan. */
1580                 IWL_WARNING("TX Power requested while scanning!\n");
1581                 return -EAGAIN;
1582         }
1583
1584         band = priv->band == IEEE80211_BAND_2GHZ;
1585
1586         is_fat =  is_fat_channel(priv->active_rxon.flags);
1587
1588         if (is_fat &&
1589             (priv->active_rxon.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
1590                 ctrl_chan_high = 1;
1591
1592         cmd.band = band;
1593         cmd.channel = priv->active_rxon.channel;
1594
1595         ret = iwl4965_fill_txpower_tbl(priv, band,
1596                                 le16_to_cpu(priv->active_rxon.channel),
1597                                 is_fat, ctrl_chan_high, &cmd.tx_power);
1598         if (ret)
1599                 goto out;
1600
1601         ret = iwl_send_cmd_pdu(priv, REPLY_TX_PWR_TABLE_CMD, sizeof(cmd), &cmd);
1602
1603 out:
1604         return ret;
1605 }
1606
1607 static int iwl4965_send_rxon_assoc(struct iwl_priv *priv)
1608 {
1609         int ret = 0;
1610         struct iwl4965_rxon_assoc_cmd rxon_assoc;
1611         const struct iwl_rxon_cmd *rxon1 = &priv->staging_rxon;
1612         const struct iwl_rxon_cmd *rxon2 = &priv->active_rxon;
1613
1614         if ((rxon1->flags == rxon2->flags) &&
1615             (rxon1->filter_flags == rxon2->filter_flags) &&
1616             (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
1617             (rxon1->ofdm_ht_single_stream_basic_rates ==
1618              rxon2->ofdm_ht_single_stream_basic_rates) &&
1619             (rxon1->ofdm_ht_dual_stream_basic_rates ==
1620              rxon2->ofdm_ht_dual_stream_basic_rates) &&
1621             (rxon1->rx_chain == rxon2->rx_chain) &&
1622             (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
1623                 IWL_DEBUG_INFO("Using current RXON_ASSOC.  Not resending.\n");
1624                 return 0;
1625         }
1626
1627         rxon_assoc.flags = priv->staging_rxon.flags;
1628         rxon_assoc.filter_flags = priv->staging_rxon.filter_flags;
1629         rxon_assoc.ofdm_basic_rates = priv->staging_rxon.ofdm_basic_rates;
1630         rxon_assoc.cck_basic_rates = priv->staging_rxon.cck_basic_rates;
1631         rxon_assoc.reserved = 0;
1632         rxon_assoc.ofdm_ht_single_stream_basic_rates =
1633             priv->staging_rxon.ofdm_ht_single_stream_basic_rates;
1634         rxon_assoc.ofdm_ht_dual_stream_basic_rates =
1635             priv->staging_rxon.ofdm_ht_dual_stream_basic_rates;
1636         rxon_assoc.rx_chain_select_flags = priv->staging_rxon.rx_chain;
1637
1638         ret = iwl_send_cmd_pdu_async(priv, REPLY_RXON_ASSOC,
1639                                      sizeof(rxon_assoc), &rxon_assoc, NULL);
1640         if (ret)
1641                 return ret;
1642
1643         return ret;
1644 }
1645
1646
1647 int iwl4965_hw_channel_switch(struct iwl_priv *priv, u16 channel)
1648 {
1649         int rc;
1650         u8 band = 0;
1651         u8 is_fat = 0;
1652         u8 ctrl_chan_high = 0;
1653         struct iwl4965_channel_switch_cmd cmd = { 0 };
1654         const struct iwl_channel_info *ch_info;
1655
1656         band = priv->band == IEEE80211_BAND_2GHZ;
1657
1658         ch_info = iwl_get_channel_info(priv, priv->band, channel);
1659
1660         is_fat = is_fat_channel(priv->staging_rxon.flags);
1661
1662         if (is_fat &&
1663             (priv->active_rxon.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
1664                 ctrl_chan_high = 1;
1665
1666         cmd.band = band;
1667         cmd.expect_beacon = 0;
1668         cmd.channel = cpu_to_le16(channel);
1669         cmd.rxon_flags = priv->active_rxon.flags;
1670         cmd.rxon_filter_flags = priv->active_rxon.filter_flags;
1671         cmd.switch_time = cpu_to_le32(priv->ucode_beacon_time);
1672         if (ch_info)
1673                 cmd.expect_beacon = is_channel_radar(ch_info);
1674         else
1675                 cmd.expect_beacon = 1;
1676
1677         rc = iwl4965_fill_txpower_tbl(priv, band, channel, is_fat,
1678                                       ctrl_chan_high, &cmd.tx_power);
1679         if (rc) {
1680                 IWL_DEBUG_11H("error:%d  fill txpower_tbl\n", rc);
1681                 return rc;
1682         }
1683
1684         rc = iwl_send_cmd_pdu(priv, REPLY_CHANNEL_SWITCH, sizeof(cmd), &cmd);
1685         return rc;
1686 }
1687
1688 static int iwl4965_shared_mem_rx_idx(struct iwl_priv *priv)
1689 {
1690         struct iwl4965_shared *s = priv->shared_virt;
1691         return le32_to_cpu(s->rb_closed) & 0xFFF;
1692 }
1693
1694 int iwl4965_hw_get_temperature(struct iwl_priv *priv)
1695 {
1696         return priv->temperature;
1697 }
1698
1699 unsigned int iwl4965_hw_get_beacon_cmd(struct iwl_priv *priv,
1700                           struct iwl_frame *frame, u8 rate)
1701 {
1702         struct iwl4965_tx_beacon_cmd *tx_beacon_cmd;
1703         unsigned int frame_size;
1704
1705         tx_beacon_cmd = &frame->u.beacon;
1706         memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));
1707
1708         tx_beacon_cmd->tx.sta_id = priv->hw_params.bcast_sta_id;
1709         tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
1710
1711         frame_size = iwl4965_fill_beacon_frame(priv,
1712                                 tx_beacon_cmd->frame,
1713                                 iwl_bcast_addr,
1714                                 sizeof(frame->u) - sizeof(*tx_beacon_cmd));
1715
1716         BUG_ON(frame_size > MAX_MPDU_SIZE);
1717         tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
1718
1719         if ((rate == IWL_RATE_1M_PLCP) || (rate >= IWL_RATE_2M_PLCP))
1720                 tx_beacon_cmd->tx.rate_n_flags =
1721                         iwl_hw_set_rate_n_flags(rate, RATE_MCS_CCK_MSK);
1722         else
1723                 tx_beacon_cmd->tx.rate_n_flags =
1724                         iwl_hw_set_rate_n_flags(rate, 0);
1725
1726         tx_beacon_cmd->tx.tx_flags = (TX_CMD_FLG_SEQ_CTL_MSK |
1727                                 TX_CMD_FLG_TSF_MSK | TX_CMD_FLG_STA_RATE_MSK);
1728         return (sizeof(*tx_beacon_cmd) + frame_size);
1729 }
1730
1731 static int iwl4965_alloc_shared_mem(struct iwl_priv *priv)
1732 {
1733         priv->shared_virt = pci_alloc_consistent(priv->pci_dev,
1734                                         sizeof(struct iwl4965_shared),
1735                                         &priv->shared_phys);
1736         if (!priv->shared_virt)
1737                 return -ENOMEM;
1738
1739         memset(priv->shared_virt, 0, sizeof(struct iwl4965_shared));
1740
1741         priv->rb_closed_offset = offsetof(struct iwl4965_shared, rb_closed);
1742
1743         return 0;
1744 }
1745
1746 static void iwl4965_free_shared_mem(struct iwl_priv *priv)
1747 {
1748         if (priv->shared_virt)
1749                 pci_free_consistent(priv->pci_dev,
1750                                     sizeof(struct iwl4965_shared),
1751                                     priv->shared_virt,
1752                                     priv->shared_phys);
1753 }
1754
1755 /**
1756  * iwl4965_txq_update_byte_cnt_tbl - Set up entry in Tx byte-count array
1757  */
1758 static void iwl4965_txq_update_byte_cnt_tbl(struct iwl_priv *priv,
1759                                             struct iwl_tx_queue *txq,
1760                                             u16 byte_cnt)
1761 {
1762         int len;
1763         int txq_id = txq->q.id;
1764         struct iwl4965_shared *shared_data = priv->shared_virt;
1765
1766         len = byte_cnt + IWL_TX_CRC_SIZE + IWL_TX_DELIMITER_SIZE;
1767
1768         /* Set up byte count within first 256 entries */
1769         IWL_SET_BITS16(shared_data->queues_byte_cnt_tbls[txq_id].
1770                        tfd_offset[txq->q.write_ptr], byte_cnt, len);
1771
1772         /* If within first 64 entries, duplicate at end */
1773         if (txq->q.write_ptr < IWL49_MAX_WIN_SIZE)
1774                 IWL_SET_BITS16(shared_data->queues_byte_cnt_tbls[txq_id].
1775                         tfd_offset[IWL49_QUEUE_SIZE + txq->q.write_ptr],
1776                         byte_cnt, len);
1777 }
1778
1779 /**
1780  * sign_extend - Sign extend a value using specified bit as sign-bit
1781  *
1782  * Example: sign_extend(9, 3) would return -7 as bit3 of 1001b is 1
1783  * and bit0..2 is 001b which when sign extended to 1111111111111001b is -7.
1784  *
1785  * @param oper value to sign extend
1786  * @param index 0 based bit index (0<=index<32) to sign bit
1787  */
1788 static s32 sign_extend(u32 oper, int index)
1789 {
1790         u8 shift = 31 - index;
1791
1792         return (s32)(oper << shift) >> shift;
1793 }
1794
1795 /**
1796  * iwl4965_get_temperature - return the calibrated temperature (in Kelvin)
1797  * @statistics: Provides the temperature reading from the uCode
1798  *
1799  * A return of <0 indicates bogus data in the statistics
1800  */
1801 int iwl4965_get_temperature(const struct iwl_priv *priv)
1802 {
1803         s32 temperature;
1804         s32 vt;
1805         s32 R1, R2, R3;
1806         u32 R4;
1807
1808         if (test_bit(STATUS_TEMPERATURE, &priv->status) &&
1809                 (priv->statistics.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK)) {
1810                 IWL_DEBUG_TEMP("Running FAT temperature calibration\n");
1811                 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[1]);
1812                 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[1]);
1813                 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[1]);
1814                 R4 = le32_to_cpu(priv->card_alive_init.therm_r4[1]);
1815         } else {
1816                 IWL_DEBUG_TEMP("Running temperature calibration\n");
1817                 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[0]);
1818                 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[0]);
1819                 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[0]);
1820                 R4 = le32_to_cpu(priv->card_alive_init.therm_r4[0]);
1821         }
1822
1823         /*
1824          * Temperature is only 23 bits, so sign extend out to 32.
1825          *
1826          * NOTE If we haven't received a statistics notification yet
1827          * with an updated temperature, use R4 provided to us in the
1828          * "initialize" ALIVE response.
1829          */
1830         if (!test_bit(STATUS_TEMPERATURE, &priv->status))
1831                 vt = sign_extend(R4, 23);
1832         else
1833                 vt = sign_extend(
1834                         le32_to_cpu(priv->statistics.general.temperature), 23);
1835
1836         IWL_DEBUG_TEMP("Calib values R[1-3]: %d %d %d R4: %d\n",
1837                        R1, R2, R3, vt);
1838
1839         if (R3 == R1) {
1840                 IWL_ERROR("Calibration conflict R1 == R3\n");
1841                 return -1;
1842         }
1843
1844         /* Calculate temperature in degrees Kelvin, adjust by 97%.
1845          * Add offset to center the adjustment around 0 degrees Centigrade. */
1846         temperature = TEMPERATURE_CALIB_A_VAL * (vt - R2);
1847         temperature /= (R3 - R1);
1848         temperature = (temperature * 97) / 100 +
1849             TEMPERATURE_CALIB_KELVIN_OFFSET;
1850
1851         IWL_DEBUG_TEMP("Calibrated temperature: %dK, %dC\n", temperature,
1852             KELVIN_TO_CELSIUS(temperature));
1853
1854         return temperature;
1855 }
1856
1857 /* Adjust Txpower only if temperature variance is greater than threshold. */
1858 #define IWL_TEMPERATURE_THRESHOLD   3
1859
1860 /**
1861  * iwl4965_is_temp_calib_needed - determines if new calibration is needed
1862  *
1863  * If the temperature changed has changed sufficiently, then a recalibration
1864  * is needed.
1865  *
1866  * Assumes caller will replace priv->last_temperature once calibration
1867  * executed.
1868  */
1869 static int iwl4965_is_temp_calib_needed(struct iwl_priv *priv)
1870 {
1871         int temp_diff;
1872
1873         if (!test_bit(STATUS_STATISTICS, &priv->status)) {
1874                 IWL_DEBUG_TEMP("Temperature not updated -- no statistics.\n");
1875                 return 0;
1876         }
1877
1878         temp_diff = priv->temperature - priv->last_temperature;
1879
1880         /* get absolute value */
1881         if (temp_diff < 0) {
1882                 IWL_DEBUG_POWER("Getting cooler, delta %d, \n", temp_diff);
1883                 temp_diff = -temp_diff;
1884         } else if (temp_diff == 0)
1885                 IWL_DEBUG_POWER("Same temp, \n");
1886         else
1887                 IWL_DEBUG_POWER("Getting warmer, delta %d, \n", temp_diff);
1888
1889         if (temp_diff < IWL_TEMPERATURE_THRESHOLD) {
1890                 IWL_DEBUG_POWER("Thermal txpower calib not needed\n");
1891                 return 0;
1892         }
1893
1894         IWL_DEBUG_POWER("Thermal txpower calib needed\n");
1895
1896         return 1;
1897 }
1898
1899 /* Calculate noise level, based on measurements during network silence just
1900  *   before arriving beacon.  This measurement can be done only if we know
1901  *   exactly when to expect beacons, therefore only when we're associated. */
1902 static void iwl4965_rx_calc_noise(struct iwl_priv *priv)
1903 {
1904         struct statistics_rx_non_phy *rx_info
1905                                 = &(priv->statistics.rx.general);
1906         int num_active_rx = 0;
1907         int total_silence = 0;
1908         int bcn_silence_a =
1909                 le32_to_cpu(rx_info->beacon_silence_rssi_a) & IN_BAND_FILTER;
1910         int bcn_silence_b =
1911                 le32_to_cpu(rx_info->beacon_silence_rssi_b) & IN_BAND_FILTER;
1912         int bcn_silence_c =
1913                 le32_to_cpu(rx_info->beacon_silence_rssi_c) & IN_BAND_FILTER;
1914
1915         if (bcn_silence_a) {
1916                 total_silence += bcn_silence_a;
1917                 num_active_rx++;
1918         }
1919         if (bcn_silence_b) {
1920                 total_silence += bcn_silence_b;
1921                 num_active_rx++;
1922         }
1923         if (bcn_silence_c) {
1924                 total_silence += bcn_silence_c;
1925                 num_active_rx++;
1926         }
1927
1928         /* Average among active antennas */
1929         if (num_active_rx)
1930                 priv->last_rx_noise = (total_silence / num_active_rx) - 107;
1931         else
1932                 priv->last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
1933
1934         IWL_DEBUG_CALIB("inband silence a %u, b %u, c %u, dBm %d\n",
1935                         bcn_silence_a, bcn_silence_b, bcn_silence_c,
1936                         priv->last_rx_noise);
1937 }
1938
1939 void iwl4965_hw_rx_statistics(struct iwl_priv *priv,
1940                               struct iwl_rx_mem_buffer *rxb)
1941 {
1942         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
1943         int change;
1944         s32 temp;
1945
1946         IWL_DEBUG_RX("Statistics notification received (%d vs %d).\n",
1947                      (int)sizeof(priv->statistics), pkt->len);
1948
1949         change = ((priv->statistics.general.temperature !=
1950                    pkt->u.stats.general.temperature) ||
1951                   ((priv->statistics.flag &
1952                     STATISTICS_REPLY_FLG_FAT_MODE_MSK) !=
1953                    (pkt->u.stats.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK)));
1954
1955         memcpy(&priv->statistics, &pkt->u.stats, sizeof(priv->statistics));
1956
1957         set_bit(STATUS_STATISTICS, &priv->status);
1958
1959         /* Reschedule the statistics timer to occur in
1960          * REG_RECALIB_PERIOD seconds to ensure we get a
1961          * thermal update even if the uCode doesn't give
1962          * us one */
1963         mod_timer(&priv->statistics_periodic, jiffies +
1964                   msecs_to_jiffies(REG_RECALIB_PERIOD * 1000));
1965
1966         if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
1967             (pkt->hdr.cmd == STATISTICS_NOTIFICATION)) {
1968                 iwl4965_rx_calc_noise(priv);
1969                 queue_work(priv->workqueue, &priv->run_time_calib_work);
1970         }
1971
1972         iwl_leds_background(priv);
1973
1974         /* If the hardware hasn't reported a change in
1975          * temperature then don't bother computing a
1976          * calibrated temperature value */
1977         if (!change)
1978                 return;
1979
1980         temp = iwl4965_get_temperature(priv);
1981         if (temp < 0)
1982                 return;
1983
1984         if (priv->temperature != temp) {
1985                 if (priv->temperature)
1986                         IWL_DEBUG_TEMP("Temperature changed "
1987                                        "from %dC to %dC\n",
1988                                        KELVIN_TO_CELSIUS(priv->temperature),
1989                                        KELVIN_TO_CELSIUS(temp));
1990                 else
1991                         IWL_DEBUG_TEMP("Temperature "
1992                                        "initialized to %dC\n",
1993                                        KELVIN_TO_CELSIUS(temp));
1994         }
1995
1996         priv->temperature = temp;
1997         set_bit(STATUS_TEMPERATURE, &priv->status);
1998
1999         if (!priv->disable_tx_power_cal &&
2000              unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
2001              iwl4965_is_temp_calib_needed(priv))
2002                 queue_work(priv->workqueue, &priv->txpower_work);
2003 }
2004
2005 static void iwl4965_add_radiotap(struct iwl_priv *priv,
2006                                  struct sk_buff *skb,
2007                                  struct iwl4965_rx_phy_res *rx_start,
2008                                  struct ieee80211_rx_status *stats,
2009                                  u32 ampdu_status)
2010 {
2011         s8 signal = stats->signal;
2012         s8 noise = 0;
2013         int rate = stats->rate_idx;
2014         u64 tsf = stats->mactime;
2015         __le16 antenna;
2016         __le16 phy_flags_hw = rx_start->phy_flags;
2017         struct iwl4965_rt_rx_hdr {
2018                 struct ieee80211_radiotap_header rt_hdr;
2019                 __le64 rt_tsf;          /* TSF */
2020                 u8 rt_flags;            /* radiotap packet flags */
2021                 u8 rt_rate;             /* rate in 500kb/s */
2022                 __le16 rt_channelMHz;   /* channel in MHz */
2023                 __le16 rt_chbitmask;    /* channel bitfield */
2024                 s8 rt_dbmsignal;        /* signal in dBm, kluged to signed */
2025                 s8 rt_dbmnoise;
2026                 u8 rt_antenna;          /* antenna number */
2027         } __attribute__ ((packed)) *iwl4965_rt;
2028
2029         /* TODO: We won't have enough headroom for HT frames. Fix it later. */
2030         if (skb_headroom(skb) < sizeof(*iwl4965_rt)) {
2031                 if (net_ratelimit())
2032                         printk(KERN_ERR "not enough headroom [%d] for "
2033                                "radiotap head [%zd]\n",
2034                                skb_headroom(skb), sizeof(*iwl4965_rt));
2035                 return;
2036         }
2037
2038         /* put radiotap header in front of 802.11 header and data */
2039         iwl4965_rt = (void *)skb_push(skb, sizeof(*iwl4965_rt));
2040
2041         /* initialise radiotap header */
2042         iwl4965_rt->rt_hdr.it_version = PKTHDR_RADIOTAP_VERSION;
2043         iwl4965_rt->rt_hdr.it_pad = 0;
2044
2045         /* total header + data */
2046         put_unaligned(cpu_to_le16(sizeof(*iwl4965_rt)),
2047                       &iwl4965_rt->rt_hdr.it_len);
2048
2049         /* Indicate all the fields we add to the radiotap header */
2050         put_unaligned(cpu_to_le32((1 << IEEE80211_RADIOTAP_TSFT) |
2051                                   (1 << IEEE80211_RADIOTAP_FLAGS) |
2052                                   (1 << IEEE80211_RADIOTAP_RATE) |
2053                                   (1 << IEEE80211_RADIOTAP_CHANNEL) |
2054                                   (1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL) |
2055                                   (1 << IEEE80211_RADIOTAP_DBM_ANTNOISE) |
2056                                   (1 << IEEE80211_RADIOTAP_ANTENNA)),
2057                       &iwl4965_rt->rt_hdr.it_present);
2058
2059         /* Zero the flags, we'll add to them as we go */
2060         iwl4965_rt->rt_flags = 0;
2061
2062         put_unaligned(cpu_to_le64(tsf), &iwl4965_rt->rt_tsf);
2063
2064         iwl4965_rt->rt_dbmsignal = signal;
2065         iwl4965_rt->rt_dbmnoise = noise;
2066
2067         /* Convert the channel frequency and set the flags */
2068         put_unaligned(cpu_to_le16(stats->freq), &iwl4965_rt->rt_channelMHz);
2069         if (!(phy_flags_hw & RX_RES_PHY_FLAGS_BAND_24_MSK))
2070                 put_unaligned(cpu_to_le16(IEEE80211_CHAN_OFDM |
2071                                           IEEE80211_CHAN_5GHZ),
2072                               &iwl4965_rt->rt_chbitmask);
2073         else if (phy_flags_hw & RX_RES_PHY_FLAGS_MOD_CCK_MSK)
2074                 put_unaligned(cpu_to_le16(IEEE80211_CHAN_CCK |
2075                                           IEEE80211_CHAN_2GHZ),
2076                               &iwl4965_rt->rt_chbitmask);
2077         else    /* 802.11g */
2078                 put_unaligned(cpu_to_le16(IEEE80211_CHAN_OFDM |
2079                                           IEEE80211_CHAN_2GHZ),
2080                               &iwl4965_rt->rt_chbitmask);
2081
2082         if (rate == -1)
2083                 iwl4965_rt->rt_rate = 0;
2084         else
2085                 iwl4965_rt->rt_rate = iwl_rates[rate].ieee;
2086
2087         /*
2088          * "antenna number"
2089          *
2090          * It seems that the antenna field in the phy flags value
2091          * is actually a bitfield. This is undefined by radiotap,
2092          * it wants an actual antenna number but I always get "7"
2093          * for most legacy frames I receive indicating that the
2094          * same frame was received on all three RX chains.
2095          *
2096          * I think this field should be removed in favour of a
2097          * new 802.11n radiotap field "RX chains" that is defined
2098          * as a bitmask.
2099          */
2100         antenna = phy_flags_hw & RX_RES_PHY_FLAGS_ANTENNA_MSK;
2101         iwl4965_rt->rt_antenna = le16_to_cpu(antenna) >> 4;
2102
2103         /* set the preamble flag if appropriate */
2104         if (phy_flags_hw & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
2105                 iwl4965_rt->rt_flags |= IEEE80211_RADIOTAP_F_SHORTPRE;
2106
2107         stats->flag |= RX_FLAG_RADIOTAP;
2108 }
2109
2110 static void iwl_update_rx_stats(struct iwl_priv *priv, u16 fc, u16 len)
2111 {
2112         /* 0 - mgmt, 1 - cnt, 2 - data */
2113         int idx = (fc & IEEE80211_FCTL_FTYPE) >> 2;
2114         priv->rx_stats[idx].cnt++;
2115         priv->rx_stats[idx].bytes += len;
2116 }
2117
2118 /*
2119  * returns non-zero if packet should be dropped
2120  */
2121 static int iwl4965_set_decrypted_flag(struct iwl_priv *priv,
2122                                       struct ieee80211_hdr *hdr,
2123                                       u32 decrypt_res,
2124                                       struct ieee80211_rx_status *stats)
2125 {
2126         u16 fc = le16_to_cpu(hdr->frame_control);
2127
2128         if (priv->active_rxon.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
2129                 return 0;
2130
2131         if (!(fc & IEEE80211_FCTL_PROTECTED))
2132                 return 0;
2133
2134         IWL_DEBUG_RX("decrypt_res:0x%x\n", decrypt_res);
2135         switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
2136         case RX_RES_STATUS_SEC_TYPE_TKIP:
2137                 /* The uCode has got a bad phase 1 Key, pushes the packet.
2138                  * Decryption will be done in SW. */
2139                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2140                     RX_RES_STATUS_BAD_KEY_TTAK)
2141                         break;
2142
2143         case RX_RES_STATUS_SEC_TYPE_WEP:
2144                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2145                     RX_RES_STATUS_BAD_ICV_MIC) {
2146                         /* bad ICV, the packet is destroyed since the
2147                          * decryption is inplace, drop it */
2148                         IWL_DEBUG_RX("Packet destroyed\n");
2149                         return -1;
2150                 }
2151         case RX_RES_STATUS_SEC_TYPE_CCMP:
2152                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2153                     RX_RES_STATUS_DECRYPT_OK) {
2154                         IWL_DEBUG_RX("hw decrypt successfully!!!\n");
2155                         stats->flag |= RX_FLAG_DECRYPTED;
2156                 }
2157                 break;
2158
2159         default:
2160                 break;
2161         }
2162         return 0;
2163 }
2164
2165 static u32 iwl4965_translate_rx_status(struct iwl_priv *priv, u32 decrypt_in)
2166 {
2167         u32 decrypt_out = 0;
2168
2169         if ((decrypt_in & RX_RES_STATUS_STATION_FOUND) ==
2170                                         RX_RES_STATUS_STATION_FOUND)
2171                 decrypt_out |= (RX_RES_STATUS_STATION_FOUND |
2172                                 RX_RES_STATUS_NO_STATION_INFO_MISMATCH);
2173
2174         decrypt_out |= (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK);
2175
2176         /* packet was not encrypted */
2177         if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
2178                                         RX_RES_STATUS_SEC_TYPE_NONE)
2179                 return decrypt_out;
2180
2181         /* packet was encrypted with unknown alg */
2182         if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
2183                                         RX_RES_STATUS_SEC_TYPE_ERR)
2184                 return decrypt_out;
2185
2186         /* decryption was not done in HW */
2187         if ((decrypt_in & RX_MPDU_RES_STATUS_DEC_DONE_MSK) !=
2188                                         RX_MPDU_RES_STATUS_DEC_DONE_MSK)
2189                 return decrypt_out;
2190
2191         switch (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) {
2192
2193         case RX_RES_STATUS_SEC_TYPE_CCMP:
2194                 /* alg is CCM: check MIC only */
2195                 if (!(decrypt_in & RX_MPDU_RES_STATUS_MIC_OK))
2196                         /* Bad MIC */
2197                         decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
2198                 else
2199                         decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
2200
2201                 break;
2202
2203         case RX_RES_STATUS_SEC_TYPE_TKIP:
2204                 if (!(decrypt_in & RX_MPDU_RES_STATUS_TTAK_OK)) {
2205                         /* Bad TTAK */
2206                         decrypt_out |= RX_RES_STATUS_BAD_KEY_TTAK;
2207                         break;
2208                 }
2209                 /* fall through if TTAK OK */
2210         default:
2211                 if (!(decrypt_in & RX_MPDU_RES_STATUS_ICV_OK))
2212                         decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
2213                 else
2214                         decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
2215                 break;
2216         };
2217
2218         IWL_DEBUG_RX("decrypt_in:0x%x  decrypt_out = 0x%x\n",
2219                                         decrypt_in, decrypt_out);
2220
2221         return decrypt_out;
2222 }
2223
2224 static void iwl4965_handle_data_packet(struct iwl_priv *priv, int is_data,
2225                                        int include_phy,
2226                                        struct iwl_rx_mem_buffer *rxb,
2227                                        struct ieee80211_rx_status *stats)
2228 {
2229         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2230         struct iwl4965_rx_phy_res *rx_start = (include_phy) ?
2231             (struct iwl4965_rx_phy_res *)&(pkt->u.raw[0]) : NULL;
2232         struct ieee80211_hdr *hdr;
2233         u16 len;
2234         __le32 *rx_end;
2235         unsigned int skblen;
2236         u32 ampdu_status;
2237         u32 ampdu_status_legacy;
2238
2239         if (!include_phy && priv->last_phy_res[0])
2240                 rx_start = (struct iwl4965_rx_phy_res *)&priv->last_phy_res[1];
2241
2242         if (!rx_start) {
2243                 IWL_ERROR("MPDU frame without a PHY data\n");
2244                 return;
2245         }
2246         if (include_phy) {
2247                 hdr = (struct ieee80211_hdr *)((u8 *) & rx_start[1] +
2248                                                rx_start->cfg_phy_cnt);
2249
2250                 len = le16_to_cpu(rx_start->byte_count);
2251
2252                 rx_end = (__le32 *) ((u8 *) & pkt->u.raw[0] +
2253                                   sizeof(struct iwl4965_rx_phy_res) +
2254                                   rx_start->cfg_phy_cnt + len);
2255
2256         } else {
2257                 struct iwl4965_rx_mpdu_res_start *amsdu =
2258                     (struct iwl4965_rx_mpdu_res_start *)pkt->u.raw;
2259
2260                 hdr = (struct ieee80211_hdr *)(pkt->u.raw +
2261                                sizeof(struct iwl4965_rx_mpdu_res_start));
2262                 len =  le16_to_cpu(amsdu->byte_count);
2263                 rx_start->byte_count = amsdu->byte_count;
2264                 rx_end = (__le32 *) (((u8 *) hdr) + len);
2265         }
2266         /* In monitor mode allow 802.11 ACk frames (10 bytes) */
2267         if (len > priv->hw_params.max_pkt_size ||
2268             len < ((priv->iw_mode == IEEE80211_IF_TYPE_MNTR) ? 10 : 16)) {
2269                 IWL_WARNING("byte count out of range [16,4K] : %d\n", len);
2270                 return;
2271         }
2272
2273         ampdu_status = le32_to_cpu(*rx_end);
2274         skblen = ((u8 *) rx_end - (u8 *) & pkt->u.raw[0]) + sizeof(u32);
2275
2276         if (!include_phy) {
2277                 /* New status scheme, need to translate */
2278                 ampdu_status_legacy = ampdu_status;
2279                 ampdu_status = iwl4965_translate_rx_status(priv, ampdu_status);
2280         }
2281
2282         /* start from MAC */
2283         skb_reserve(rxb->skb, (void *)hdr - (void *)pkt);
2284         skb_put(rxb->skb, len); /* end where data ends */
2285
2286         /* We only process data packets if the interface is open */
2287         if (unlikely(!priv->is_open)) {
2288                 IWL_DEBUG_DROP_LIMIT
2289                     ("Dropping packet while interface is not open.\n");
2290                 return;
2291         }
2292
2293         stats->flag = 0;
2294         hdr = (struct ieee80211_hdr *)rxb->skb->data;
2295
2296         /*  in case of HW accelerated crypto and bad decryption, drop */
2297         if (!priv->hw_params.sw_crypto &&
2298             iwl4965_set_decrypted_flag(priv, hdr, ampdu_status, stats))
2299                 return;
2300
2301         if (priv->add_radiotap)
2302                 iwl4965_add_radiotap(priv, rxb->skb, rx_start, stats, ampdu_status);
2303
2304         iwl_update_rx_stats(priv, le16_to_cpu(hdr->frame_control), len);
2305         ieee80211_rx_irqsafe(priv->hw, rxb->skb, stats);
2306         priv->alloc_rxb_skb--;
2307         rxb->skb = NULL;
2308 }
2309
2310 /* Calc max signal level (dBm) among 3 possible receivers */
2311 static int iwl4965_calc_rssi(struct iwl_priv *priv,
2312                              struct iwl4965_rx_phy_res *rx_resp)
2313 {
2314         /* data from PHY/DSP regarding signal strength, etc.,
2315          *   contents are always there, not configurable by host.  */
2316         struct iwl4965_rx_non_cfg_phy *ncphy =
2317             (struct iwl4965_rx_non_cfg_phy *)rx_resp->non_cfg_phy;
2318         u32 agc = (le16_to_cpu(ncphy->agc_info) & IWL_AGC_DB_MASK)
2319                         >> IWL_AGC_DB_POS;
2320
2321         u32 valid_antennae =
2322             (le16_to_cpu(rx_resp->phy_flags) & RX_PHY_FLAGS_ANTENNAE_MASK)
2323                         >> RX_PHY_FLAGS_ANTENNAE_OFFSET;
2324         u8 max_rssi = 0;
2325         u32 i;
2326
2327         /* Find max rssi among 3 possible receivers.
2328          * These values are measured by the digital signal processor (DSP).
2329          * They should stay fairly constant even as the signal strength varies,
2330          *   if the radio's automatic gain control (AGC) is working right.
2331          * AGC value (see below) will provide the "interesting" info. */
2332         for (i = 0; i < 3; i++)
2333                 if (valid_antennae & (1 << i))
2334                         max_rssi = max(ncphy->rssi_info[i << 1], max_rssi);
2335
2336         IWL_DEBUG_STATS("Rssi In A %d B %d C %d Max %d AGC dB %d\n",
2337                 ncphy->rssi_info[0], ncphy->rssi_info[2], ncphy->rssi_info[4],
2338                 max_rssi, agc);
2339
2340         /* dBm = max_rssi dB - agc dB - constant.
2341          * Higher AGC (higher radio gain) means lower signal. */
2342         return (max_rssi - agc - IWL_RSSI_OFFSET);
2343 }
2344
2345 static void iwl4965_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
2346 {
2347         unsigned long flags;
2348
2349         spin_lock_irqsave(&priv->sta_lock, flags);
2350         priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK;
2351         priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
2352         priv->stations[sta_id].sta.sta.modify_mask = 0;
2353         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
2354         spin_unlock_irqrestore(&priv->sta_lock, flags);
2355
2356         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
2357 }
2358
2359 static void iwl4965_update_ps_mode(struct iwl_priv *priv, u16 ps_bit, u8 *addr)
2360 {
2361         /* FIXME: need locking over ps_status ??? */
2362         u8 sta_id = iwl_find_station(priv, addr);
2363
2364         if (sta_id != IWL_INVALID_STATION) {
2365                 u8 sta_awake = priv->stations[sta_id].
2366                                 ps_status == STA_PS_STATUS_WAKE;
2367
2368                 if (sta_awake && ps_bit)
2369                         priv->stations[sta_id].ps_status = STA_PS_STATUS_SLEEP;
2370                 else if (!sta_awake && !ps_bit) {
2371                         iwl4965_sta_modify_ps_wake(priv, sta_id);
2372                         priv->stations[sta_id].ps_status = STA_PS_STATUS_WAKE;
2373                 }
2374         }
2375 }
2376 #ifdef CONFIG_IWLWIFI_DEBUG
2377
2378 /**
2379  * iwl4965_dbg_report_frame - dump frame to syslog during debug sessions
2380  *
2381  * You may hack this function to show different aspects of received frames,
2382  * including selective frame dumps.
2383  * group100 parameter selects whether to show 1 out of 100 good frames.
2384  *
2385  * TODO:  This was originally written for 3945, need to audit for
2386  *        proper operation with 4965.
2387  */
2388 static void iwl4965_dbg_report_frame(struct iwl_priv *priv,
2389                       struct iwl_rx_packet *pkt,
2390                       struct ieee80211_hdr *header, int group100)
2391 {
2392         u32 to_us;
2393         u32 print_summary = 0;
2394         u32 print_dump = 0;     /* set to 1 to dump all frames' contents */
2395         u32 hundred = 0;
2396         u32 dataframe = 0;
2397         u16 fc;
2398         u16 seq_ctl;
2399         u16 channel;
2400         u16 phy_flags;
2401         int rate_sym;
2402         u16 length;
2403         u16 status;
2404         u16 bcn_tmr;
2405         u32 tsf_low;
2406         u64 tsf;
2407         u8 rssi;
2408         u8 agc;
2409         u16 sig_avg;
2410         u16 noise_diff;
2411         struct iwl4965_rx_frame_stats *rx_stats = IWL_RX_STATS(pkt);
2412         struct iwl4965_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
2413         struct iwl4965_rx_frame_end *rx_end = IWL_RX_END(pkt);
2414         u8 *data = IWL_RX_DATA(pkt);
2415
2416         if (likely(!(priv->debug_level & IWL_DL_RX)))
2417                 return;
2418
2419         /* MAC header */
2420         fc = le16_to_cpu(header->frame_control);
2421         seq_ctl = le16_to_cpu(header->seq_ctrl);
2422
2423         /* metadata */
2424         channel = le16_to_cpu(rx_hdr->channel);
2425         phy_flags = le16_to_cpu(rx_hdr->phy_flags);
2426         rate_sym = rx_hdr->rate;
2427         length = le16_to_cpu(rx_hdr->len);
2428
2429         /* end-of-frame status and timestamp */
2430         status = le32_to_cpu(rx_end->status);
2431         bcn_tmr = le32_to_cpu(rx_end->beacon_timestamp);
2432         tsf_low = le64_to_cpu(rx_end->timestamp) & 0x0ffffffff;
2433         tsf = le64_to_cpu(rx_end->timestamp);
2434
2435         /* signal statistics */
2436         rssi = rx_stats->rssi;
2437         agc = rx_stats->agc;
2438         sig_avg = le16_to_cpu(rx_stats->sig_avg);
2439         noise_diff = le16_to_cpu(rx_stats->noise_diff);
2440
2441         to_us = !compare_ether_addr(header->addr1, priv->mac_addr);
2442
2443         /* if data frame is to us and all is good,
2444          *   (optionally) print summary for only 1 out of every 100 */
2445         if (to_us && (fc & ~IEEE80211_FCTL_PROTECTED) ==
2446             (IEEE80211_FCTL_FROMDS | IEEE80211_FTYPE_DATA)) {
2447                 dataframe = 1;
2448                 if (!group100)
2449                         print_summary = 1;      /* print each frame */
2450                 else if (priv->framecnt_to_us < 100) {
2451                         priv->framecnt_to_us++;
2452                         print_summary = 0;
2453                 } else {
2454                         priv->framecnt_to_us = 0;
2455                         print_summary = 1;
2456                         hundred = 1;
2457                 }
2458         } else {
2459                 /* print summary for all other frames */
2460                 print_summary = 1;
2461         }
2462
2463         if (print_summary) {
2464                 char *title;
2465                 int rate_idx;
2466                 u32 bitrate;
2467
2468                 if (hundred)
2469                         title = "100Frames";
2470                 else if (fc & IEEE80211_FCTL_RETRY)
2471                         title = "Retry";
2472                 else if (ieee80211_is_assoc_response(fc))
2473                         title = "AscRsp";
2474                 else if (ieee80211_is_reassoc_response(fc))
2475                         title = "RasRsp";
2476                 else if (ieee80211_is_probe_response(fc)) {
2477                         title = "PrbRsp";
2478                         print_dump = 1; /* dump frame contents */
2479                 } else if (ieee80211_is_beacon(fc)) {
2480                         title = "Beacon";
2481                         print_dump = 1; /* dump frame contents */
2482                 } else if (ieee80211_is_atim(fc))
2483                         title = "ATIM";
2484                 else if (ieee80211_is_auth(fc))
2485                         title = "Auth";
2486                 else if (ieee80211_is_deauth(fc))
2487                         title = "DeAuth";
2488                 else if (ieee80211_is_disassoc(fc))
2489                         title = "DisAssoc";
2490                 else
2491                         title = "Frame";
2492
2493                 rate_idx = iwl_hwrate_to_plcp_idx(rate_sym);
2494                 if (unlikely(rate_idx == -1))
2495                         bitrate = 0;
2496                 else
2497                         bitrate = iwl_rates[rate_idx].ieee / 2;
2498
2499                 /* print frame summary.
2500                  * MAC addresses show just the last byte (for brevity),
2501                  *    but you can hack it to show more, if you'd like to. */
2502                 if (dataframe)
2503                         IWL_DEBUG_RX("%s: mhd=0x%04x, dst=0x%02x, "
2504                                      "len=%u, rssi=%d, chnl=%d, rate=%u, \n",
2505                                      title, fc, header->addr1[5],
2506                                      length, rssi, channel, bitrate);
2507                 else {
2508                         /* src/dst addresses assume managed mode */
2509                         IWL_DEBUG_RX("%s: 0x%04x, dst=0x%02x, "
2510                                      "src=0x%02x, rssi=%u, tim=%lu usec, "
2511                                      "phy=0x%02x, chnl=%d\n",
2512                                      title, fc, header->addr1[5],
2513                                      header->addr3[5], rssi,
2514                                      tsf_low - priv->scan_start_tsf,
2515                                      phy_flags, channel);
2516                 }
2517         }
2518         if (print_dump)
2519                 iwl_print_hex_dump(priv, IWL_DL_RX, data, length);
2520 }
2521 #else
2522 static inline void iwl4965_dbg_report_frame(struct iwl_priv *priv,
2523                                             struct iwl_rx_packet *pkt,
2524                                             struct ieee80211_hdr *header,
2525                                             int group100)
2526 {
2527 }
2528 #endif
2529
2530
2531
2532 /* Called for REPLY_RX (legacy ABG frames), or
2533  * REPLY_RX_MPDU_CMD (HT high-throughput N frames). */
2534 void iwl4965_rx_reply_rx(struct iwl_priv *priv,
2535                                 struct iwl_rx_mem_buffer *rxb)
2536 {
2537         struct ieee80211_hdr *header;
2538         struct ieee80211_rx_status rx_status;
2539         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2540         /* Use phy data (Rx signal strength, etc.) contained within
2541          *   this rx packet for legacy frames,
2542          *   or phy data cached from REPLY_RX_PHY_CMD for HT frames. */
2543         int include_phy = (pkt->hdr.cmd == REPLY_RX);
2544         struct iwl4965_rx_phy_res *rx_start = (include_phy) ?
2545                 (struct iwl4965_rx_phy_res *)&(pkt->u.raw[0]) :
2546                 (struct iwl4965_rx_phy_res *)&priv->last_phy_res[1];
2547         __le32 *rx_end;
2548         unsigned int len = 0;
2549         u16 fc;
2550         u8 network_packet;
2551
2552         rx_status.mactime = le64_to_cpu(rx_start->timestamp);
2553         rx_status.freq =
2554                 ieee80211_channel_to_frequency(le16_to_cpu(rx_start->channel));
2555         rx_status.band = (rx_start->phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ?
2556                                 IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
2557         rx_status.rate_idx =
2558                 iwl_hwrate_to_plcp_idx(le32_to_cpu(rx_start->rate_n_flags));
2559         if (rx_status.band == IEEE80211_BAND_5GHZ)
2560                 rx_status.rate_idx -= IWL_FIRST_OFDM_RATE;
2561
2562         rx_status.antenna = 0;
2563         rx_status.flag = 0;
2564
2565         if ((unlikely(rx_start->cfg_phy_cnt > 20))) {
2566                 IWL_DEBUG_DROP("dsp size out of range [0,20]: %d/n",
2567                                 rx_start->cfg_phy_cnt);
2568                 return;
2569         }
2570
2571         if (!include_phy) {
2572                 if (priv->last_phy_res[0])
2573                         rx_start = (struct iwl4965_rx_phy_res *)
2574                                 &priv->last_phy_res[1];
2575                 else
2576                         rx_start = NULL;
2577         }
2578
2579         if (!rx_start) {
2580                 IWL_ERROR("MPDU frame without a PHY data\n");
2581                 return;
2582         }
2583
2584         if (include_phy) {
2585                 header = (struct ieee80211_hdr *)((u8 *) & rx_start[1]
2586                                                   + rx_start->cfg_phy_cnt);
2587
2588                 len = le16_to_cpu(rx_start->byte_count);
2589                 rx_end = (__le32 *)(pkt->u.raw + rx_start->cfg_phy_cnt +
2590                                   sizeof(struct iwl4965_rx_phy_res) + len);
2591         } else {
2592                 struct iwl4965_rx_mpdu_res_start *amsdu =
2593                         (struct iwl4965_rx_mpdu_res_start *)pkt->u.raw;
2594
2595                 header = (void *)(pkt->u.raw +
2596                         sizeof(struct iwl4965_rx_mpdu_res_start));
2597                 len = le16_to_cpu(amsdu->byte_count);
2598                 rx_end = (__le32 *) (pkt->u.raw +
2599                         sizeof(struct iwl4965_rx_mpdu_res_start) + len);
2600         }
2601
2602         if (!(*rx_end & RX_RES_STATUS_NO_CRC32_ERROR) ||
2603             !(*rx_end & RX_RES_STATUS_NO_RXE_OVERFLOW)) {
2604                 IWL_DEBUG_RX("Bad CRC or FIFO: 0x%08X.\n",
2605                                 le32_to_cpu(*rx_end));
2606                 return;
2607         }
2608
2609         priv->ucode_beacon_time = le32_to_cpu(rx_start->beacon_time_stamp);
2610
2611         /* Find max signal strength (dBm) among 3 antenna/receiver chains */
2612         rx_status.signal = iwl4965_calc_rssi(priv, rx_start);
2613
2614         /* Meaningful noise values are available only from beacon statistics,
2615          *   which are gathered only when associated, and indicate noise
2616          *   only for the associated network channel ...
2617          * Ignore these noise values while scanning (other channels) */
2618         if (iwl_is_associated(priv) &&
2619             !test_bit(STATUS_SCANNING, &priv->status)) {
2620                 rx_status.noise = priv->last_rx_noise;
2621                 rx_status.qual = iwl4965_calc_sig_qual(rx_status.signal,
2622                                                          rx_status.noise);
2623         } else {
2624                 rx_status.noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
2625                 rx_status.qual = iwl4965_calc_sig_qual(rx_status.signal, 0);
2626         }
2627
2628         /* Reset beacon noise level if not associated. */
2629         if (!iwl_is_associated(priv))
2630                 priv->last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
2631
2632         /* Set "1" to report good data frames in groups of 100 */
2633         /* FIXME: need to optimze the call: */
2634         iwl4965_dbg_report_frame(priv, pkt, header, 1);
2635
2636         IWL_DEBUG_STATS_LIMIT("Rssi %d, noise %d, qual %d, TSF %llu\n",
2637                               rx_status.signal, rx_status.noise, rx_status.signal,
2638                               (unsigned long long)rx_status.mactime);
2639
2640
2641         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
2642                 iwl4965_handle_data_packet(priv, 1, include_phy,
2643                                                  rxb, &rx_status);
2644                 return;
2645         }
2646
2647         network_packet = iwl4965_is_network_packet(priv, header);
2648         if (network_packet) {
2649                 priv->last_rx_rssi = rx_status.signal;
2650                 priv->last_beacon_time =  priv->ucode_beacon_time;
2651                 priv->last_tsf = le64_to_cpu(rx_start->timestamp);
2652         }
2653
2654         fc = le16_to_cpu(header->frame_control);
2655         switch (fc & IEEE80211_FCTL_FTYPE) {
2656         case IEEE80211_FTYPE_MGMT:
2657                 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
2658                         iwl4965_update_ps_mode(priv, fc  & IEEE80211_FCTL_PM,
2659                                                 header->addr2);
2660                 iwl4965_handle_data_packet(priv, 0, include_phy, rxb, &rx_status);
2661                 break;
2662
2663         case IEEE80211_FTYPE_CTL:
2664                 switch (fc & IEEE80211_FCTL_STYPE) {
2665                 case IEEE80211_STYPE_BACK_REQ:
2666                         IWL_DEBUG_HT("IEEE80211_STYPE_BACK_REQ arrived\n");
2667                         iwl4965_handle_data_packet(priv, 0, include_phy,
2668                                                 rxb, &rx_status);
2669                         break;
2670                 default:
2671                         break;
2672                 }
2673                 break;
2674
2675         case IEEE80211_FTYPE_DATA: {
2676                 DECLARE_MAC_BUF(mac1);
2677                 DECLARE_MAC_BUF(mac2);
2678                 DECLARE_MAC_BUF(mac3);
2679
2680                 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
2681                         iwl4965_update_ps_mode(priv, fc  & IEEE80211_FCTL_PM,
2682                                                 header->addr2);
2683
2684                 if (unlikely(!network_packet))
2685                         IWL_DEBUG_DROP("Dropping (non network): "
2686                                        "%s, %s, %s\n",
2687                                        print_mac(mac1, header->addr1),
2688                                        print_mac(mac2, header->addr2),
2689                                        print_mac(mac3, header->addr3));
2690                 else if (unlikely(iwl4965_is_duplicate_packet(priv, header)))
2691                         IWL_DEBUG_DROP("Dropping (dup): %s, %s, %s\n",
2692                                        print_mac(mac1, header->addr1),
2693                                        print_mac(mac2, header->addr2),
2694                                        print_mac(mac3, header->addr3));
2695                 else
2696                         iwl4965_handle_data_packet(priv, 1, include_phy, rxb,
2697                                                    &rx_status);
2698                 break;
2699         }
2700         default:
2701                 break;
2702
2703         }
2704 }
2705
2706 /**
2707  * iwl4965_tx_status_reply_compressed_ba - Update tx status from block-ack
2708  *
2709  * Go through block-ack's bitmap of ACK'd frames, update driver's record of
2710  * ACK vs. not.  This gets sent to mac80211, then to rate scaling algo.
2711  */
2712 static int iwl4965_tx_status_reply_compressed_ba(struct iwl_priv *priv,
2713                                                  struct iwl_ht_agg *agg,
2714                                                  struct iwl4965_compressed_ba_resp*
2715                                                  ba_resp)
2716
2717 {
2718         int i, sh, ack;
2719         u16 seq_ctl = le16_to_cpu(ba_resp->seq_ctl);
2720         u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
2721         u64 bitmap;
2722         int successes = 0;
2723         struct ieee80211_tx_info *info;
2724
2725         if (unlikely(!agg->wait_for_ba))  {
2726                 IWL_ERROR("Received BA when not expected\n");
2727                 return -EINVAL;
2728         }
2729
2730         /* Mark that the expected block-ack response arrived */
2731         agg->wait_for_ba = 0;
2732         IWL_DEBUG_TX_REPLY("BA %d %d\n", agg->start_idx, ba_resp->seq_ctl);
2733
2734         /* Calculate shift to align block-ack bits with our Tx window bits */
2735         sh = agg->start_idx - SEQ_TO_INDEX(seq_ctl>>4);
2736         if (sh < 0) /* tbw something is wrong with indices */
2737                 sh += 0x100;
2738
2739         /* don't use 64-bit values for now */
2740         bitmap = le64_to_cpu(ba_resp->bitmap) >> sh;
2741
2742         if (agg->frame_count > (64 - sh)) {
2743                 IWL_DEBUG_TX_REPLY("more frames than bitmap size");
2744                 return -1;
2745         }
2746
2747         /* check for success or failure according to the
2748          * transmitted bitmap and block-ack bitmap */
2749         bitmap &= agg->bitmap;
2750
2751         /* For each frame attempted in aggregation,
2752          * update driver's record of tx frame's status. */
2753         for (i = 0; i < agg->frame_count ; i++) {
2754                 ack = bitmap & (1 << i);
2755                 successes += !!ack;
2756                 IWL_DEBUG_TX_REPLY("%s ON i=%d idx=%d raw=%d\n",
2757                         ack? "ACK":"NACK", i, (agg->start_idx + i) & 0xff,
2758                         agg->start_idx + i);
2759         }
2760
2761         info = IEEE80211_SKB_CB(priv->txq[scd_flow].txb[agg->start_idx].skb[0]);
2762         memset(&info->status, 0, sizeof(info->status));
2763         info->flags = IEEE80211_TX_STAT_ACK;
2764         info->flags |= IEEE80211_TX_STAT_AMPDU;
2765         info->status.ampdu_ack_map = successes;
2766         info->status.ampdu_ack_len = agg->frame_count;
2767         iwl_hwrate_to_tx_control(priv, agg->rate_n_flags, info);
2768
2769         IWL_DEBUG_TX_REPLY("Bitmap %llx\n", (unsigned long long)bitmap);
2770
2771         return 0;
2772 }
2773
2774 /**
2775  * iwl4965_tx_queue_stop_scheduler - Stop queue, but keep configuration
2776  */
2777 static void iwl4965_tx_queue_stop_scheduler(struct iwl_priv *priv,
2778                                             u16 txq_id)
2779 {
2780         /* Simply stop the queue, but don't change any configuration;
2781          * the SCD_ACT_EN bit is the write-enable mask for the ACTIVE bit. */
2782         iwl_write_prph(priv,
2783                 IWL49_SCD_QUEUE_STATUS_BITS(txq_id),
2784                 (0 << IWL49_SCD_QUEUE_STTS_REG_POS_ACTIVE)|
2785                 (1 << IWL49_SCD_QUEUE_STTS_REG_POS_SCD_ACT_EN));
2786 }
2787
2788 /**
2789  * txq_id must be greater than IWL49_FIRST_AMPDU_QUEUE
2790  * priv->lock must be held by the caller
2791  */
2792 static int iwl4965_txq_agg_disable(struct iwl_priv *priv, u16 txq_id,
2793                                    u16 ssn_idx, u8 tx_fifo)
2794 {
2795         int ret = 0;
2796
2797         if (IWL49_FIRST_AMPDU_QUEUE > txq_id) {
2798                 IWL_WARNING("queue number too small: %d, must be > %d\n",
2799                                 txq_id, IWL49_FIRST_AMPDU_QUEUE);
2800                 return -EINVAL;
2801         }
2802
2803         ret = iwl_grab_nic_access(priv);
2804         if (ret)
2805                 return ret;
2806
2807         iwl4965_tx_queue_stop_scheduler(priv, txq_id);
2808
2809         iwl_clear_bits_prph(priv, IWL49_SCD_QUEUECHAIN_SEL, (1 << txq_id));
2810
2811         priv->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
2812         priv->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
2813         /* supposes that ssn_idx is valid (!= 0xFFF) */
2814         iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx);
2815
2816         iwl_clear_bits_prph(priv, IWL49_SCD_INTERRUPT_MASK, (1 << txq_id));
2817         iwl_txq_ctx_deactivate(priv, txq_id);
2818         iwl4965_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 0);
2819
2820         iwl_release_nic_access(priv);
2821
2822         return 0;
2823 }
2824
2825
2826 /**
2827  * iwl4965_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
2828  *
2829  * Handles block-acknowledge notification from device, which reports success
2830  * of frames sent via aggregation.
2831  */
2832 static void iwl4965_rx_reply_compressed_ba(struct iwl_priv *priv,
2833                                            struct iwl_rx_mem_buffer *rxb)
2834 {
2835         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2836         struct iwl4965_compressed_ba_resp *ba_resp = &pkt->u.compressed_ba;
2837         int index;
2838         struct iwl_tx_queue *txq = NULL;
2839         struct iwl_ht_agg *agg;
2840         DECLARE_MAC_BUF(mac);
2841
2842         /* "flow" corresponds to Tx queue */
2843         u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
2844
2845         /* "ssn" is start of block-ack Tx window, corresponds to index
2846          * (in Tx queue's circular buffer) of first TFD/frame in window */
2847         u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
2848
2849         if (scd_flow >= priv->hw_params.max_txq_num) {
2850                 IWL_ERROR("BUG_ON scd_flow is bigger than number of queues");
2851                 return;
2852         }
2853
2854         txq = &priv->txq[scd_flow];
2855         agg = &priv->stations[ba_resp->sta_id].tid[ba_resp->tid].agg;
2856
2857         /* Find index just before block-ack window */
2858         index = iwl_queue_dec_wrap(ba_resp_scd_ssn & 0xff, txq->q.n_bd);
2859
2860         /* TODO: Need to get this copy more safely - now good for debug */
2861
2862         IWL_DEBUG_TX_REPLY("REPLY_COMPRESSED_BA [%d]Received from %s, "
2863                            "sta_id = %d\n",
2864                            agg->wait_for_ba,
2865                            print_mac(mac, (u8*) &ba_resp->sta_addr_lo32),
2866                            ba_resp->sta_id);
2867         IWL_DEBUG_TX_REPLY("TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = "
2868                            "%d, scd_ssn = %d\n",
2869                            ba_resp->tid,
2870                            ba_resp->seq_ctl,
2871                            (unsigned long long)le64_to_cpu(ba_resp->bitmap),
2872                            ba_resp->scd_flow,
2873                            ba_resp->scd_ssn);
2874         IWL_DEBUG_TX_REPLY("DAT start_idx = %d, bitmap = 0x%llx \n",
2875                            agg->start_idx,
2876                            (unsigned long long)agg->bitmap);
2877
2878         /* Update driver's record of ACK vs. not for each frame in window */
2879         iwl4965_tx_status_reply_compressed_ba(priv, agg, ba_resp);
2880
2881         /* Release all TFDs before the SSN, i.e. all TFDs in front of
2882          * block-ack window (we assume that they've been successfully
2883          * transmitted ... if not, it's too late anyway). */
2884         if (txq->q.read_ptr != (ba_resp_scd_ssn & 0xff)) {
2885                 /* calculate mac80211 ampdu sw queue to wake */
2886                 int ampdu_q =
2887                    scd_flow - priv->hw_params.first_ampdu_q + priv->hw->queues;
2888                 int freed = iwl_tx_queue_reclaim(priv, scd_flow, index);
2889                 priv->stations[ba_resp->sta_id].
2890                         tid[ba_resp->tid].tfds_in_queue -= freed;
2891                 if (iwl_queue_space(&txq->q) > txq->q.low_mark &&
2892                         priv->mac80211_registered &&
2893                         agg->state != IWL_EMPTYING_HW_QUEUE_DELBA)
2894                         ieee80211_wake_queue(priv->hw, ampdu_q);
2895
2896                 iwl_txq_check_empty(priv, ba_resp->sta_id,
2897                                     ba_resp->tid, scd_flow);
2898         }
2899 }
2900
2901 /**
2902  * iwl4965_tx_queue_set_q2ratid - Map unique receiver/tid combination to a queue
2903  */
2904 static int iwl4965_tx_queue_set_q2ratid(struct iwl_priv *priv, u16 ra_tid,
2905                                         u16 txq_id)
2906 {
2907         u32 tbl_dw_addr;
2908         u32 tbl_dw;
2909         u16 scd_q2ratid;
2910
2911         scd_q2ratid = ra_tid & IWL_SCD_QUEUE_RA_TID_MAP_RATID_MSK;
2912
2913         tbl_dw_addr = priv->scd_base_addr +
2914                         IWL49_SCD_TRANSLATE_TBL_OFFSET_QUEUE(txq_id);
2915
2916         tbl_dw = iwl_read_targ_mem(priv, tbl_dw_addr);
2917
2918         if (txq_id & 0x1)
2919                 tbl_dw = (scd_q2ratid << 16) | (tbl_dw & 0x0000FFFF);
2920         else
2921                 tbl_dw = scd_q2ratid | (tbl_dw & 0xFFFF0000);
2922
2923         iwl_write_targ_mem(priv, tbl_dw_addr, tbl_dw);
2924
2925         return 0;
2926 }
2927
2928
2929 /**
2930  * iwl4965_tx_queue_agg_enable - Set up & enable aggregation for selected queue
2931  *
2932  * NOTE:  txq_id must be greater than IWL49_FIRST_AMPDU_QUEUE,
2933  *        i.e. it must be one of the higher queues used for aggregation
2934  */
2935 static int iwl4965_txq_agg_enable(struct iwl_priv *priv, int txq_id,
2936                                   int tx_fifo, int sta_id, int tid, u16 ssn_idx)
2937 {
2938         unsigned long flags;
2939         int ret;
2940         u16 ra_tid;
2941
2942         if (IWL49_FIRST_AMPDU_QUEUE > txq_id)
2943                 IWL_WARNING("queue number too small: %d, must be > %d\n",
2944                         txq_id, IWL49_FIRST_AMPDU_QUEUE);
2945
2946         ra_tid = BUILD_RAxTID(sta_id, tid);
2947
2948         /* Modify device's station table to Tx this TID */
2949         iwl_sta_modify_enable_tid_tx(priv, sta_id, tid);
2950
2951         spin_lock_irqsave(&priv->lock, flags);
2952         ret = iwl_grab_nic_access(priv);
2953         if (ret) {
2954                 spin_unlock_irqrestore(&priv->lock, flags);
2955                 return ret;
2956         }
2957
2958         /* Stop this Tx queue before configuring it */
2959         iwl4965_tx_queue_stop_scheduler(priv, txq_id);
2960
2961         /* Map receiver-address / traffic-ID to this queue */
2962         iwl4965_tx_queue_set_q2ratid(priv, ra_tid, txq_id);
2963
2964         /* Set this queue as a chain-building queue */
2965         iwl_set_bits_prph(priv, IWL49_SCD_QUEUECHAIN_SEL, (1 << txq_id));
2966
2967         /* Place first TFD at index corresponding to start sequence number.
2968          * Assumes that ssn_idx is valid (!= 0xFFF) */
2969         priv->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
2970         priv->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
2971         iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx);
2972
2973         /* Set up Tx window size and frame limit for this queue */
2974         iwl_write_targ_mem(priv,
2975                 priv->scd_base_addr + IWL49_SCD_CONTEXT_QUEUE_OFFSET(txq_id),
2976                 (SCD_WIN_SIZE << IWL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) &
2977                 IWL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
2978
2979         iwl_write_targ_mem(priv, priv->scd_base_addr +
2980                 IWL49_SCD_CONTEXT_QUEUE_OFFSET(txq_id) + sizeof(u32),
2981                 (SCD_FRAME_LIMIT << IWL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS)
2982                 & IWL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
2983
2984         iwl_set_bits_prph(priv, IWL49_SCD_INTERRUPT_MASK, (1 << txq_id));
2985
2986         /* Set up Status area in SRAM, map to Tx DMA/FIFO, activate the queue */
2987         iwl4965_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 1);
2988
2989         iwl_release_nic_access(priv);
2990         spin_unlock_irqrestore(&priv->lock, flags);
2991
2992         return 0;
2993 }
2994
2995 static int iwl4965_rx_agg_start(struct iwl_priv *priv,
2996                                 const u8 *addr, int tid, u16 ssn)
2997 {
2998         unsigned long flags;
2999         int sta_id;
3000
3001         sta_id = iwl_find_station(priv, addr);
3002         if (sta_id == IWL_INVALID_STATION)
3003                 return -ENXIO;
3004
3005         spin_lock_irqsave(&priv->sta_lock, flags);
3006         priv->stations[sta_id].sta.station_flags_msk = 0;
3007         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
3008         priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
3009         priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
3010         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3011         spin_unlock_irqrestore(&priv->sta_lock, flags);
3012
3013         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
3014                                         CMD_ASYNC);
3015 }
3016
3017 static int iwl4965_rx_agg_stop(struct iwl_priv *priv,
3018                                const u8 *addr, int tid)
3019 {
3020         unsigned long flags;
3021         int sta_id;
3022
3023         sta_id = iwl_find_station(priv, addr);
3024         if (sta_id == IWL_INVALID_STATION)
3025                 return -ENXIO;
3026
3027         spin_lock_irqsave(&priv->sta_lock, flags);
3028         priv->stations[sta_id].sta.station_flags_msk = 0;
3029         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
3030         priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
3031         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3032         spin_unlock_irqrestore(&priv->sta_lock, flags);
3033
3034         return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
3035                                         CMD_ASYNC);
3036 }
3037
3038 int iwl4965_mac_ampdu_action(struct ieee80211_hw *hw,
3039                              enum ieee80211_ampdu_mlme_action action,
3040                              const u8 *addr, u16 tid, u16 *ssn)
3041 {
3042         struct iwl_priv *priv = hw->priv;
3043         DECLARE_MAC_BUF(mac);
3044
3045         IWL_DEBUG_HT("A-MPDU action on addr %s tid %d\n",
3046                      print_mac(mac, addr), tid);
3047
3048         switch (action) {
3049         case IEEE80211_AMPDU_RX_START:
3050                 IWL_DEBUG_HT("start Rx\n");
3051                 return iwl4965_rx_agg_start(priv, addr, tid, *ssn);
3052         case IEEE80211_AMPDU_RX_STOP:
3053                 IWL_DEBUG_HT("stop Rx\n");
3054                 return iwl4965_rx_agg_stop(priv, addr, tid);
3055         case IEEE80211_AMPDU_TX_START:
3056                 IWL_DEBUG_HT("start Tx\n");
3057                 return iwl_tx_agg_start(priv, addr, tid, ssn);
3058         case IEEE80211_AMPDU_TX_STOP:
3059                 IWL_DEBUG_HT("stop Tx\n");
3060                 return iwl_tx_agg_stop(priv, addr, tid);
3061         default:
3062                 IWL_DEBUG_HT("unknown\n");
3063                 return -EINVAL;
3064                 break;
3065         }
3066         return 0;
3067 }
3068
3069 static u16 iwl4965_get_hcmd_size(u8 cmd_id, u16 len)
3070 {
3071         switch (cmd_id) {
3072         case REPLY_RXON:
3073                 return (u16) sizeof(struct iwl4965_rxon_cmd);
3074         default:
3075                 return len;
3076         }
3077 }
3078
3079 static u16 iwl4965_build_addsta_hcmd(const struct iwl_addsta_cmd *cmd, u8 *data)
3080 {
3081         struct iwl4965_addsta_cmd *addsta = (struct iwl4965_addsta_cmd *)data;
3082         addsta->mode = cmd->mode;
3083         memcpy(&addsta->sta, &cmd->sta, sizeof(struct sta_id_modify));
3084         memcpy(&addsta->key, &cmd->key, sizeof(struct iwl4965_keyinfo));
3085         addsta->station_flags = cmd->station_flags;
3086         addsta->station_flags_msk = cmd->station_flags_msk;
3087         addsta->tid_disable_tx = cmd->tid_disable_tx;
3088         addsta->add_immediate_ba_tid = cmd->add_immediate_ba_tid;
3089         addsta->remove_immediate_ba_tid = cmd->remove_immediate_ba_tid;
3090         addsta->add_immediate_ba_ssn = cmd->add_immediate_ba_ssn;
3091         addsta->reserved1 = __constant_cpu_to_le16(0);
3092         addsta->reserved2 = __constant_cpu_to_le32(0);
3093
3094         return (u16)sizeof(struct iwl4965_addsta_cmd);
3095 }
3096
3097 static inline u32 iwl4965_get_scd_ssn(struct iwl4965_tx_resp *tx_resp)
3098 {
3099         return le32_to_cpup(&tx_resp->u.status + tx_resp->frame_count) & MAX_SN;
3100 }
3101
3102 /**
3103  * iwl4965_tx_status_reply_tx - Handle Tx rspnse for frames in aggregation queue
3104  */
3105 static int iwl4965_tx_status_reply_tx(struct iwl_priv *priv,
3106                                       struct iwl_ht_agg *agg,
3107                                       struct iwl4965_tx_resp *tx_resp,
3108                                       int txq_id, u16 start_idx)
3109 {
3110         u16 status;
3111         struct agg_tx_status *frame_status = tx_resp->u.agg_status;
3112         struct ieee80211_tx_info *info = NULL;
3113         struct ieee80211_hdr *hdr = NULL;
3114         u32 rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
3115         int i, sh, idx;
3116         u16 seq;
3117         if (agg->wait_for_ba)
3118                 IWL_DEBUG_TX_REPLY("got tx response w/o block-ack\n");
3119
3120         agg->frame_count = tx_resp->frame_count;
3121         agg->start_idx = start_idx;
3122         agg->rate_n_flags = rate_n_flags;
3123         agg->bitmap = 0;
3124
3125         /* # frames attempted by Tx command */
3126         if (agg->frame_count == 1) {
3127                 /* Only one frame was attempted; no block-ack will arrive */
3128                 status = le16_to_cpu(frame_status[0].status);
3129                 idx = start_idx;
3130
3131                 /* FIXME: code repetition */
3132                 IWL_DEBUG_TX_REPLY("FrameCnt = %d, StartIdx=%d idx=%d\n",
3133                                    agg->frame_count, agg->start_idx, idx);
3134
3135                 info = IEEE80211_SKB_CB(priv->txq[txq_id].txb[idx].skb[0]);
3136                 info->status.retry_count = tx_resp->failure_frame;
3137                 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
3138                 info->flags |= iwl_is_tx_success(status)?
3139                         IEEE80211_TX_STAT_ACK : 0;
3140                 iwl_hwrate_to_tx_control(priv, rate_n_flags, info);
3141                 /* FIXME: code repetition end */
3142
3143                 IWL_DEBUG_TX_REPLY("1 Frame 0x%x failure :%d\n",
3144                                     status & 0xff, tx_resp->failure_frame);
3145                 IWL_DEBUG_TX_REPLY("Rate Info rate_n_flags=%x\n", rate_n_flags);
3146
3147                 agg->wait_for_ba = 0;
3148         } else {
3149                 /* Two or more frames were attempted; expect block-ack */
3150                 u64 bitmap = 0;
3151                 int start = agg->start_idx;
3152
3153                 /* Construct bit-map of pending frames within Tx window */
3154                 for (i = 0; i < agg->frame_count; i++) {
3155                         u16 sc;
3156                         status = le16_to_cpu(frame_status[i].status);
3157                         seq  = le16_to_cpu(frame_status[i].sequence);
3158                         idx = SEQ_TO_INDEX(seq);
3159                         txq_id = SEQ_TO_QUEUE(seq);
3160
3161                         if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
3162                                       AGG_TX_STATE_ABORT_MSK))
3163                                 continue;
3164
3165                         IWL_DEBUG_TX_REPLY("FrameCnt = %d, txq_id=%d idx=%d\n",
3166                                            agg->frame_count, txq_id, idx);
3167
3168                         hdr = iwl_tx_queue_get_hdr(priv, txq_id, idx);
3169
3170                         sc = le16_to_cpu(hdr->seq_ctrl);
3171                         if (idx != (SEQ_TO_SN(sc) & 0xff)) {
3172                                 IWL_ERROR("BUG_ON idx doesn't match seq control"
3173                                           " idx=%d, seq_idx=%d, seq=%d\n",
3174                                           idx, SEQ_TO_SN(sc),
3175                                           hdr->seq_ctrl);
3176                                 return -1;
3177                         }
3178
3179                         IWL_DEBUG_TX_REPLY("AGG Frame i=%d idx %d seq=%d\n",
3180                                            i, idx, SEQ_TO_SN(sc));
3181
3182                         sh = idx - start;
3183                         if (sh > 64) {
3184                                 sh = (start - idx) + 0xff;
3185                                 bitmap = bitmap << sh;
3186                                 sh = 0;
3187                                 start = idx;
3188                         } else if (sh < -64)
3189                                 sh  = 0xff - (start - idx);
3190                         else if (sh < 0) {
3191                                 sh = start - idx;
3192                                 start = idx;
3193                                 bitmap = bitmap << sh;
3194                                 sh = 0;
3195                         }
3196                         bitmap |= (1 << sh);
3197                         IWL_DEBUG_TX_REPLY("start=%d bitmap=0x%x\n",
3198                                            start, (u32)(bitmap & 0xFFFFFFFF));
3199                 }
3200
3201                 agg->bitmap = bitmap;
3202                 agg->start_idx = start;
3203                 IWL_DEBUG_TX_REPLY("Frames %d start_idx=%d bitmap=0x%llx\n",
3204                                    agg->frame_count, agg->start_idx,
3205                                    (unsigned long long)agg->bitmap);
3206
3207                 if (bitmap)
3208                         agg->wait_for_ba = 1;
3209         }
3210         return 0;
3211 }
3212
3213 /**
3214  * iwl4965_rx_reply_tx - Handle standard (non-aggregation) Tx response
3215  */
3216 static void iwl4965_rx_reply_tx(struct iwl_priv *priv,
3217                                 struct iwl_rx_mem_buffer *rxb)
3218 {
3219         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
3220         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3221         int txq_id = SEQ_TO_QUEUE(sequence);
3222         int index = SEQ_TO_INDEX(sequence);
3223         struct iwl_tx_queue *txq = &priv->txq[txq_id];
3224         struct ieee80211_tx_info *info;
3225         struct iwl4965_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
3226         u32  status = le32_to_cpu(tx_resp->u.status);
3227         int tid = MAX_TID_COUNT, sta_id = IWL_INVALID_STATION;
3228         u16 fc;
3229         struct ieee80211_hdr *hdr;
3230         u8 *qc = NULL;
3231
3232         if ((index >= txq->q.n_bd) || (iwl_queue_used(&txq->q, index) == 0)) {
3233                 IWL_ERROR("Read index for DMA queue txq_id (%d) index %d "
3234                           "is out of range [0-%d] %d %d\n", txq_id,
3235                           index, txq->q.n_bd, txq->q.write_ptr,
3236                           txq->q.read_ptr);
3237                 return;
3238         }
3239
3240         info = IEEE80211_SKB_CB(txq->txb[txq->q.read_ptr].skb[0]);
3241         memset(&info->status, 0, sizeof(info->status));
3242
3243         hdr = iwl_tx_queue_get_hdr(priv, txq_id, index);
3244         fc = le16_to_cpu(hdr->frame_control);
3245         if (ieee80211_is_qos_data(fc)) {
3246                 qc = ieee80211_get_qos_ctrl(hdr, ieee80211_get_hdrlen(fc));
3247                 tid = qc[0] & 0xf;
3248         }
3249
3250         sta_id = iwl_get_ra_sta_id(priv, hdr);
3251         if (txq->sched_retry && unlikely(sta_id == IWL_INVALID_STATION)) {
3252                 IWL_ERROR("Station not known\n");
3253                 return;
3254         }
3255
3256         if (txq->sched_retry) {
3257                 const u32 scd_ssn = iwl4965_get_scd_ssn(tx_resp);
3258                 struct iwl_ht_agg *agg = NULL;
3259
3260                 if (!qc)
3261                         return;
3262
3263                 agg = &priv->stations[sta_id].tid[tid].agg;
3264
3265                 iwl4965_tx_status_reply_tx(priv, agg, tx_resp, txq_id, index);
3266
3267                 if ((tx_resp->frame_count == 1) && !iwl_is_tx_success(status)) {
3268                         /* TODO: send BAR */
3269                 }
3270
3271                 if (txq->q.read_ptr != (scd_ssn & 0xff)) {
3272                         int freed, ampdu_q;
3273                         index = iwl_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd);
3274                         IWL_DEBUG_TX_REPLY("Retry scheduler reclaim scd_ssn "
3275                                            "%d index %d\n", scd_ssn , index);
3276                         freed = iwl_tx_queue_reclaim(priv, txq_id, index);
3277                         priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
3278
3279                         if (iwl_queue_space(&txq->q) > txq->q.low_mark &&
3280                             txq_id >= 0 && priv->mac80211_registered &&
3281                             agg->state != IWL_EMPTYING_HW_QUEUE_DELBA) {
3282                                 /* calculate mac80211 ampdu sw queue to wake */
3283                                 ampdu_q = txq_id - IWL49_FIRST_AMPDU_QUEUE +
3284                                           priv->hw->queues;
3285                                 if (agg->state == IWL_AGG_OFF)
3286                                         ieee80211_wake_queue(priv->hw, txq_id);
3287                                 else
3288                                         ieee80211_wake_queue(priv->hw, ampdu_q);
3289                         }
3290                         iwl_txq_check_empty(priv, sta_id, tid, txq_id);
3291                 }
3292         } else {
3293                 info->status.retry_count = tx_resp->failure_frame;
3294                 info->flags |=
3295                         iwl_is_tx_success(status) ? IEEE80211_TX_STAT_ACK : 0;
3296                 iwl_hwrate_to_tx_control(priv,
3297                                         le32_to_cpu(tx_resp->rate_n_flags),
3298                                         info);
3299
3300                 IWL_DEBUG_TX("Tx queue %d Status %s (0x%08x) rate_n_flags "
3301                              "0x%x retries %d\n", txq_id,
3302                                 iwl_get_tx_fail_reason(status),
3303                                 status, le32_to_cpu(tx_resp->rate_n_flags),
3304                                 tx_resp->failure_frame);
3305
3306                 IWL_DEBUG_TX_REPLY("Tx queue reclaim %d\n", index);
3307
3308                 if (index != -1) {
3309                     int freed = iwl_tx_queue_reclaim(priv, txq_id, index);
3310                     if (tid != MAX_TID_COUNT)
3311                         priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
3312                     if (iwl_queue_space(&txq->q) > txq->q.low_mark &&
3313                         (txq_id >= 0) && priv->mac80211_registered)
3314                         ieee80211_wake_queue(priv->hw, txq_id);
3315                     if (tid != MAX_TID_COUNT)
3316                         iwl_txq_check_empty(priv, sta_id, tid, txq_id);
3317                 }
3318         }
3319
3320         if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK))
3321                 IWL_ERROR("TODO:  Implement Tx ABORT REQUIRED!!!\n");
3322 }
3323
3324
3325 /* Set up 4965-specific Rx frame reply handlers */
3326 static void iwl4965_rx_handler_setup(struct iwl_priv *priv)
3327 {
3328         /* Legacy Rx frames */
3329         priv->rx_handlers[REPLY_RX] = iwl4965_rx_reply_rx;
3330         /* Tx response */
3331         priv->rx_handlers[REPLY_TX] = iwl4965_rx_reply_tx;
3332         /* block ack */
3333         priv->rx_handlers[REPLY_COMPRESSED_BA] = iwl4965_rx_reply_compressed_ba;
3334 }
3335
3336 static void iwl4965_setup_deferred_work(struct iwl_priv *priv)
3337 {
3338         INIT_WORK(&priv->txpower_work, iwl4965_bg_txpower_work);
3339 }
3340
3341 static void iwl4965_cancel_deferred_work(struct iwl_priv *priv)
3342 {
3343         cancel_work_sync(&priv->txpower_work);
3344 }
3345
3346
3347 static struct iwl_hcmd_ops iwl4965_hcmd = {
3348         .rxon_assoc = iwl4965_send_rxon_assoc,
3349 };
3350
3351 static struct iwl_hcmd_utils_ops iwl4965_hcmd_utils = {
3352         .get_hcmd_size = iwl4965_get_hcmd_size,
3353         .build_addsta_hcmd = iwl4965_build_addsta_hcmd,
3354         .chain_noise_reset = iwl4965_chain_noise_reset,
3355         .gain_computation = iwl4965_gain_computation,
3356 };
3357
3358 static struct iwl_lib_ops iwl4965_lib = {
3359         .set_hw_params = iwl4965_hw_set_hw_params,
3360         .alloc_shared_mem = iwl4965_alloc_shared_mem,
3361         .free_shared_mem = iwl4965_free_shared_mem,
3362         .shared_mem_rx_idx = iwl4965_shared_mem_rx_idx,
3363         .txq_update_byte_cnt_tbl = iwl4965_txq_update_byte_cnt_tbl,
3364         .txq_set_sched = iwl4965_txq_set_sched,
3365         .txq_agg_enable = iwl4965_txq_agg_enable,
3366         .txq_agg_disable = iwl4965_txq_agg_disable,
3367         .rx_handler_setup = iwl4965_rx_handler_setup,
3368         .setup_deferred_work = iwl4965_setup_deferred_work,
3369         .cancel_deferred_work = iwl4965_cancel_deferred_work,
3370         .is_valid_rtc_data_addr = iwl4965_hw_valid_rtc_data_addr,
3371         .alive_notify = iwl4965_alive_notify,
3372         .init_alive_start = iwl4965_init_alive_start,
3373         .load_ucode = iwl4965_load_bsm,
3374         .apm_ops = {
3375                 .init = iwl4965_apm_init,
3376                 .reset = iwl4965_apm_reset,
3377                 .stop = iwl4965_apm_stop,
3378                 .config = iwl4965_nic_config,
3379                 .set_pwr_src = iwl4965_set_pwr_src,
3380         },
3381         .eeprom_ops = {
3382                 .regulatory_bands = {
3383                         EEPROM_REGULATORY_BAND_1_CHANNELS,
3384                         EEPROM_REGULATORY_BAND_2_CHANNELS,
3385                         EEPROM_REGULATORY_BAND_3_CHANNELS,
3386                         EEPROM_REGULATORY_BAND_4_CHANNELS,
3387                         EEPROM_REGULATORY_BAND_5_CHANNELS,
3388                         EEPROM_4965_REGULATORY_BAND_24_FAT_CHANNELS,
3389                         EEPROM_4965_REGULATORY_BAND_52_FAT_CHANNELS
3390                 },
3391                 .verify_signature  = iwlcore_eeprom_verify_signature,
3392                 .acquire_semaphore = iwlcore_eeprom_acquire_semaphore,
3393                 .release_semaphore = iwlcore_eeprom_release_semaphore,
3394                 .check_version = iwl4965_eeprom_check_version,
3395                 .query_addr = iwlcore_eeprom_query_addr,
3396         },
3397         .radio_kill_sw = iwl4965_radio_kill_sw,
3398         .set_power = iwl4965_set_power,
3399         .send_tx_power  = iwl4965_send_tx_power,
3400         .update_chain_flags = iwl4965_update_chain_flags,
3401 };
3402
3403 static struct iwl_ops iwl4965_ops = {
3404         .lib = &iwl4965_lib,
3405         .hcmd = &iwl4965_hcmd,
3406         .utils = &iwl4965_hcmd_utils,
3407 };
3408
3409 struct iwl_cfg iwl4965_agn_cfg = {
3410         .name = "4965AGN",
3411         .fw_name = "iwlwifi-4965" IWL4965_UCODE_API ".ucode",
3412         .sku = IWL_SKU_A|IWL_SKU_G|IWL_SKU_N,
3413         .eeprom_size = IWL4965_EEPROM_IMG_SIZE,
3414         .ops = &iwl4965_ops,
3415         .mod_params = &iwl4965_mod_params,
3416 };
3417
3418 module_param_named(antenna, iwl4965_mod_params.antenna, int, 0444);
3419 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
3420 module_param_named(disable, iwl4965_mod_params.disable, int, 0444);
3421 MODULE_PARM_DESC(disable, "manually disable the radio (default 0 [radio on])");
3422 module_param_named(swcrypto, iwl4965_mod_params.sw_crypto, int, 0444);
3423 MODULE_PARM_DESC(swcrypto, "using crypto in software (default 0 [hardware])\n");
3424 module_param_named(debug, iwl4965_mod_params.debug, int, 0444);
3425 MODULE_PARM_DESC(debug, "debug output mask");
3426 module_param_named(
3427         disable_hw_scan, iwl4965_mod_params.disable_hw_scan, int, 0444);
3428 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
3429
3430 module_param_named(queues_num, iwl4965_mod_params.num_of_queues, int, 0444);
3431 MODULE_PARM_DESC(queues_num, "number of hw queues.");
3432
3433 /* QoS */
3434 module_param_named(qos_enable, iwl4965_mod_params.enable_qos, int, 0444);
3435 MODULE_PARM_DESC(qos_enable, "enable all QoS functionality");
3436 module_param_named(amsdu_size_8K, iwl4965_mod_params.amsdu_size_8K, int, 0444);
3437 MODULE_PARM_DESC(amsdu_size_8K, "enable 8K amsdu size");
3438 module_param_named(fw_restart4965, iwl4965_mod_params.restart_fw, int, 0444);
3439 MODULE_PARM_DESC(fw_restart4965, "restart firmware in case of error");