drivers/net/wireless/iwlwifi/iwl-sv-open.c

   1 /******************************************************************************
   2  *
   3  * This file is provided under a dual BSD/GPLv2 license.  When using or
   4  * redistributing this file, you may do so under either license.
   5  *
   6  * GPL LICENSE SUMMARY
   7  *
   8  * Copyright(c) 2010 - 2011 Intel Corporation. All rights reserved.
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of version 2 of the GNU General Public License as
  12  * published by the Free Software Foundation.
  13  *
  14  * This program is distributed in the hope that it will be useful, but
  15  * WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * General Public License for more details.
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  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  22  * USA
  23  *
  24  * The full GNU General Public License is included in this distribution
  25  * in the file called LICENSE.GPL.
  26  *
  27  * Contact Information:
  28  *  Intel Linux Wireless <[email protected]>
  29  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  30  *
  31  * BSD LICENSE
  32  *
  33  * Copyright(c) 2010 - 2011 Intel Corporation. All rights reserved.
  34  * All rights reserved.
  35  *
  36  * Redistribution and use in source and binary forms, with or without
  37  * modification, are permitted provided that the following conditions
  38  * are met:
  39  *
  40  *  * Redistributions of source code must retain the above copyright
  41  *    notice, this list of conditions and the following disclaimer.
  42  *  * Redistributions in binary form must reproduce the above copyright
  43  *    notice, this list of conditions and the following disclaimer in
  44  *    the documentation and/or other materials provided with the
  45  *    distribution.
  46  *  * Neither the name Intel Corporation nor the names of its
  47  *    contributors may be used to endorse or promote products derived
  48  *    from this software without specific prior written permission.
  49  *
  50  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  51  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  52  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  53  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  54  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  55  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  56  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  57  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  58  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  59  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  60  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  61  *
  62  *****************************************************************************/
  63 #include <linux/init.h>
  64 #include <linux/kernel.h>
  65 #include <linux/module.h>
  66 #include <net/net_namespace.h>
  67 #include <linux/netdevice.h>
  68 #include <net/cfg80211.h>
  69 #include <net/mac80211.h>
  70 #include <net/netlink.h>
  71
  72
  73 #include "iwl-dev.h"
  74 #include "iwl-core.h"
  75 #include "iwl-debug.h"
  76 #include "iwl-fh.h"
  77 #include "iwl-io.h"
  78 #include "iwl-agn.h"
  79 #include "iwl-testmode.h"
  80
  81
  82 /* The TLVs used in the gnl message policy between the kernel module and
  83  * user space application. iwl_testmode_gnl_msg_policy is to be carried
  84  * through the NL80211_CMD_TESTMODE channel regulated by nl80211.
  85  * See iwl-testmode.h
  86  */
  87 static
  88 struct nla_policy iwl_testmode_gnl_msg_policy[IWL_TM_ATTR_MAX] = {
  89         [IWL_TM_ATTR_COMMAND] = { .type = NLA_U32, },
  90
  91         [IWL_TM_ATTR_UCODE_CMD_ID] = { .type = NLA_U8, },
  92         [IWL_TM_ATTR_UCODE_CMD_DATA] = { .type = NLA_UNSPEC, },
  93
  94         [IWL_TM_ATTR_REG_OFFSET] = { .type = NLA_U32, },
  95         [IWL_TM_ATTR_REG_VALUE8] = { .type = NLA_U8, },
  96         [IWL_TM_ATTR_REG_VALUE32] = { .type = NLA_U32, },
  97
  98         [IWL_TM_ATTR_SYNC_RSP] = { .type = NLA_UNSPEC, },
  99         [IWL_TM_ATTR_UCODE_RX_PKT] = { .type = NLA_UNSPEC, },
 100
 101         [IWL_TM_ATTR_EEPROM] = { .type = NLA_UNSPEC, },
 102
 103         [IWL_TM_ATTR_TRACE_ADDR] = { .type = NLA_UNSPEC, },
 104         [IWL_TM_ATTR_TRACE_DATA] = { .type = NLA_UNSPEC, },
 105
 106 };
 107
 108 /*
 109  * See the struct iwl_rx_packet in iwl-commands.h for the format of the
 110  * received events from the device
 111  */
 112 static inline int get_event_length(struct iwl_rx_mem_buffer *rxb)
 113 {
 114         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 115         if (pkt)
 116                 return le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
 117         else
 118                 return 0;
 119 }
 120
 121
 122 /*
 123  * This function multicasts the spontaneous messages from the device to the
 124  * user space. It is invoked whenever there is a received messages
 125  * from the device. This function is called within the ISR of the rx handlers
 126  * in iwlagn driver.
 127  *
 128  * The parsing of the message content is left to the user space application,
 129  * The message content is treated as unattacked raw data and is encapsulated
 130  * with IWL_TM_ATTR_UCODE_RX_PKT multicasting to the user space.
 131  *
 132  * @priv: the instance of iwlwifi device
 133  * @rxb: pointer to rx data content received by the ISR
 134  *
 135  * See the message policies and TLVs in iwl_testmode_gnl_msg_policy[].
 136  * For the messages multicasting to the user application, the mandatory
 137  * TLV fields are :
 138  *      IWL_TM_ATTR_COMMAND must be IWL_TM_CMD_DEV2APP_UCODE_RX_PKT
 139  *      IWL_TM_ATTR_UCODE_RX_PKT for carrying the message content
 140  */
 141
 142 static void iwl_testmode_ucode_rx_pkt(struct iwl_priv *priv,
 143                                 struct iwl_rx_mem_buffer *rxb)
 144 {
 145         struct ieee80211_hw *hw = priv->hw;
 146         struct sk_buff *skb;
 147         void *data;
 148         int length;
 149
 150         data = (void *)rxb_addr(rxb);
 151         length = get_event_length(rxb);
 152
 153         if (!data || length == 0)
 154                 return;
 155
 156         skb = cfg80211_testmode_alloc_event_skb(hw->wiphy, 20 + length,
 157                                                                 GFP_ATOMIC);
 158         if (skb == NULL) {
 159                 IWL_DEBUG_INFO(priv,
 160                          "Run out of memory for messages to user space ?\n");
 161                 return;
 162         }
 163         NLA_PUT_U32(skb, IWL_TM_ATTR_COMMAND, IWL_TM_CMD_DEV2APP_UCODE_RX_PKT);
 164         NLA_PUT(skb, IWL_TM_ATTR_UCODE_RX_PKT, length, data);
 165         cfg80211_testmode_event(skb, GFP_ATOMIC);
 166         return;
 167
 168 nla_put_failure:
 169         kfree_skb(skb);
 170         IWL_DEBUG_INFO(priv, "Ouch, overran buffer, check allocation!\n");
 171 }
 172
 173 void iwl_testmode_init(struct iwl_priv *priv)
 174 {
 175         priv->pre_rx_handler = iwl_testmode_ucode_rx_pkt;
 176         priv->testmode_trace.trace_enabled = false;
 177 }
 178
 179 static void iwl_trace_cleanup(struct iwl_priv *priv)
 180 {
 181         struct device *dev = &priv->pci_dev->dev;
 182
 183         if (priv->testmode_trace.trace_enabled) {
 184                 if (priv->testmode_trace.cpu_addr &&
 185                     priv->testmode_trace.dma_addr)
 186                         dma_free_coherent(dev,
 187                                         TRACE_TOTAL_SIZE,
 188                                         priv->testmode_trace.cpu_addr,
 189                                         priv->testmode_trace.dma_addr);
 190                 priv->testmode_trace.trace_enabled = false;
 191                 priv->testmode_trace.cpu_addr = NULL;
 192                 priv->testmode_trace.trace_addr = NULL;
 193                 priv->testmode_trace.dma_addr = 0;
 194         }
 195 }
 196
 197
 198 void iwl_testmode_cleanup(struct iwl_priv *priv)
 199 {
 200         iwl_trace_cleanup(priv);
 201 }
 202
 203 /*
 204  * This function handles the user application commands to the ucode.
 205  *
 206  * It retrieves the mandatory fields IWL_TM_ATTR_UCODE_CMD_ID and
 207  * IWL_TM_ATTR_UCODE_CMD_DATA and calls to the handler to send the
 208  * host command to the ucode.
 209  *
 210  * If any mandatory field is missing, -ENOMSG is replied to the user space
 211  * application; otherwise, the actual execution result of the host command to
 212  * ucode is replied.
 213  *
 214  * @hw: ieee80211_hw object that represents the device
 215  * @tb: gnl message fields from the user space
 216  */
 217 static int iwl_testmode_ucode(struct ieee80211_hw *hw, struct nlattr **tb)
 218 {
 219         struct iwl_priv *priv = hw->priv;
 220         struct iwl_host_cmd cmd;
 221
 222         memset(&cmd, 0, sizeof(struct iwl_host_cmd));
 223
 224         if (!tb[IWL_TM_ATTR_UCODE_CMD_ID] ||
 225             !tb[IWL_TM_ATTR_UCODE_CMD_DATA]) {
 226                 IWL_DEBUG_INFO(priv,
 227                         "Error finding ucode command mandatory fields\n");
 228                 return -ENOMSG;
 229         }
 230
 231         cmd.id = nla_get_u8(tb[IWL_TM_ATTR_UCODE_CMD_ID]);
 232         cmd.data[0] = nla_data(tb[IWL_TM_ATTR_UCODE_CMD_DATA]);
 233         cmd.len[0] = nla_len(tb[IWL_TM_ATTR_UCODE_CMD_DATA]);
 234         cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
 235         IWL_INFO(priv, "testmode ucode command ID 0x%x, flags 0x%x,"
 236                                 " len %d\n", cmd.id, cmd.flags, cmd.len[0]);
 237         /* ok, let's submit the command to ucode */
 238         return iwl_send_cmd(priv, &cmd);
 239 }
 240
 241
 242 /*
 243  * This function handles the user application commands for register access.
 244  *
 245  * It retrieves command ID carried with IWL_TM_ATTR_COMMAND and calls to the
 246  * handlers respectively.
 247  *
 248  * If it's an unknown commdn ID, -ENOSYS is returned; or -ENOMSG if the
 249  * mandatory fields(IWL_TM_ATTR_REG_OFFSET,IWL_TM_ATTR_REG_VALUE32,
 250  * IWL_TM_ATTR_REG_VALUE8) are missing; Otherwise 0 is replied indicating
 251  * the success of the command execution.
 252  *
 253  * If IWL_TM_ATTR_COMMAND is IWL_TM_CMD_APP2DEV_REG_READ32, the register read
 254  * value is returned with IWL_TM_ATTR_REG_VALUE32.
 255  *
 256  * @hw: ieee80211_hw object that represents the device
 257  * @tb: gnl message fields from the user space
 258  */
 259 static int iwl_testmode_reg(struct ieee80211_hw *hw, struct nlattr **tb)
 260 {
 261         struct iwl_priv *priv = hw->priv;
 262         u32 ofs, val32;
 263         u8 val8;
 264         struct sk_buff *skb;
 265         int status = 0;
 266
 267         if (!tb[IWL_TM_ATTR_REG_OFFSET]) {
 268                 IWL_DEBUG_INFO(priv, "Error finding register offset\n");
 269                 return -ENOMSG;
 270         }
 271         ofs = nla_get_u32(tb[IWL_TM_ATTR_REG_OFFSET]);
 272         IWL_INFO(priv, "testmode register access command offset 0x%x\n", ofs);
 273
 274         switch (nla_get_u32(tb[IWL_TM_ATTR_COMMAND])) {
 275         case IWL_TM_CMD_APP2DEV_REG_READ32:
 276                 val32 = iwl_read32(priv, ofs);
 277                 IWL_INFO(priv, "32bit value to read 0x%x\n", val32);
 278
 279                 skb = cfg80211_testmode_alloc_reply_skb(hw->wiphy, 20);
 280                 if (!skb) {
 281                         IWL_DEBUG_INFO(priv, "Error allocating memory\n");
 282                         return -ENOMEM;
 283                 }
 284                 NLA_PUT_U32(skb, IWL_TM_ATTR_REG_VALUE32, val32);
 285                 status = cfg80211_testmode_reply(skb);
 286                 if (status < 0)
 287                         IWL_DEBUG_INFO(priv,
 288                                        "Error sending msg : %d\n", status);
 289                 break;
 290         case IWL_TM_CMD_APP2DEV_REG_WRITE32:
 291                 if (!tb[IWL_TM_ATTR_REG_VALUE32]) {
 292                         IWL_DEBUG_INFO(priv,
 293                                        "Error finding value to write\n");
 294                         return -ENOMSG;
 295                 } else {
 296                         val32 = nla_get_u32(tb[IWL_TM_ATTR_REG_VALUE32]);
 297                         IWL_INFO(priv, "32bit value to write 0x%x\n", val32);
 298                         iwl_write32(priv, ofs, val32);
 299                 }
 300                 break;
 301         case IWL_TM_CMD_APP2DEV_REG_WRITE8:
 302                 if (!tb[IWL_TM_ATTR_REG_VALUE8]) {
 303                         IWL_DEBUG_INFO(priv, "Error finding value to write\n");
 304                         return -ENOMSG;
 305                 } else {
 306                         val8 = nla_get_u8(tb[IWL_TM_ATTR_REG_VALUE8]);
 307                         IWL_INFO(priv, "8bit value to write 0x%x\n", val8);
 308                         iwl_write8(priv, ofs, val8);
 309                 }
 310                 break;
 311         default:
 312                 IWL_DEBUG_INFO(priv, "Unknown testmode register command ID\n");
 313                 return -ENOSYS;
 314         }
 315
 316         return status;
 317
 318 nla_put_failure:
 319         kfree_skb(skb);
 320         return -EMSGSIZE;
 321 }
 322
 323
 324 static int iwl_testmode_cfg_init_calib(struct iwl_priv *priv)
 325 {
 326         struct iwl_notification_wait calib_wait;
 327         int ret;
 328
 329         iwlagn_init_notification_wait(priv, &calib_wait,
 330                                       CALIBRATION_COMPLETE_NOTIFICATION,
 331                                       NULL, NULL);
 332         ret = iwlagn_init_alive_start(priv);
 333         if (ret) {
 334                 IWL_DEBUG_INFO(priv,
 335                         "Error configuring init calibration: %d\n", ret);
 336                 goto cfg_init_calib_error;
 337         }
 338
 339         ret = iwlagn_wait_notification(priv, &calib_wait, 2 * HZ);
 340         if (ret)
 341                 IWL_DEBUG_INFO(priv, "Error detecting"
 342                         " CALIBRATION_COMPLETE_NOTIFICATION: %d\n", ret);
 343         return ret;
 344
 345 cfg_init_calib_error:
 346         iwlagn_remove_notification(priv, &calib_wait);
 347         return ret;
 348 }
 349
 350 /*
 351  * This function handles the user application commands for driver.
 352  *
 353  * It retrieves command ID carried with IWL_TM_ATTR_COMMAND and calls to the
 354  * handlers respectively.
 355  *
 356  * If it's an unknown commdn ID, -ENOSYS is replied; otherwise, the returned
 357  * value of the actual command execution is replied to the user application.
 358  *
 359  * If there's any message responding to the user space, IWL_TM_ATTR_SYNC_RSP
 360  * is used for carry the message while IWL_TM_ATTR_COMMAND must set to
 361  * IWL_TM_CMD_DEV2APP_SYNC_RSP.
 362  *
 363  * @hw: ieee80211_hw object that represents the device
 364  * @tb: gnl message fields from the user space
 365  */
 366 static int iwl_testmode_driver(struct ieee80211_hw *hw, struct nlattr **tb)
 367 {
 368         struct iwl_priv *priv = hw->priv;
 369         struct sk_buff *skb;
 370         unsigned char *rsp_data_ptr = NULL;
 371         int status = 0, rsp_data_len = 0;
 372
 373         switch (nla_get_u32(tb[IWL_TM_ATTR_COMMAND])) {
 374         case IWL_TM_CMD_APP2DEV_GET_DEVICENAME:
 375                 rsp_data_ptr = (unsigned char *)priv->cfg->name;
 376                 rsp_data_len = strlen(priv->cfg->name);
 377                 skb = cfg80211_testmode_alloc_reply_skb(hw->wiphy,
 378                                                         rsp_data_len + 20);
 379                 if (!skb) {
 380                         IWL_DEBUG_INFO(priv,
 381                                        "Error allocating memory\n");
 382                         return -ENOMEM;
 383                 }
 384                 NLA_PUT_U32(skb, IWL_TM_ATTR_COMMAND,
 385                             IWL_TM_CMD_DEV2APP_SYNC_RSP);
 386                 NLA_PUT(skb, IWL_TM_ATTR_SYNC_RSP,
 387                         rsp_data_len, rsp_data_ptr);
 388                 status = cfg80211_testmode_reply(skb);
 389                 if (status < 0)
 390                         IWL_DEBUG_INFO(priv, "Error sending msg : %d\n",
 391                                        status);
 392                 break;
 393
 394         case IWL_TM_CMD_APP2DEV_LOAD_INIT_FW:
 395                 status = iwlagn_load_ucode_wait_alive(priv, &priv->ucode_init,
 396                                            UCODE_SUBTYPE_INIT, -1);
 397                 if (status)
 398                         IWL_DEBUG_INFO(priv,
 399                                 "Error loading init ucode: %d\n", status);
 400                 break;
 401
 402         case IWL_TM_CMD_APP2DEV_CFG_INIT_CALIB:
 403                 iwl_testmode_cfg_init_calib(priv);
 404                 iwlagn_stop_device(priv);
 405                 break;
 406
 407         case IWL_TM_CMD_APP2DEV_LOAD_RUNTIME_FW:
 408                 status = iwlagn_load_ucode_wait_alive(priv,
 409                                            &priv->ucode_rt,
 410                                            UCODE_SUBTYPE_REGULAR,
 411                                            UCODE_SUBTYPE_REGULAR_NEW);
 412                 if (status) {
 413                         IWL_DEBUG_INFO(priv,
 414                                 "Error loading runtime ucode: %d\n", status);
 415                         break;
 416                 }
 417                 status = iwl_alive_start(priv);
 418                 if (status)
 419                         IWL_DEBUG_INFO(priv,
 420                                 "Error starting the device: %d\n", status);
 421                 break;
 422
 423         case IWL_TM_CMD_APP2DEV_GET_EEPROM:
 424                 if (priv->eeprom) {
 425                         skb = cfg80211_testmode_alloc_reply_skb(hw->wiphy,
 426                                 priv->cfg->base_params->eeprom_size + 20);
 427                         if (!skb) {
 428                                 IWL_DEBUG_INFO(priv,
 429                                        "Error allocating memory\n");
 430                                 return -ENOMEM;
 431                         }
 432                         NLA_PUT_U32(skb, IWL_TM_ATTR_COMMAND,
 433                                 IWL_TM_CMD_DEV2APP_EEPROM_RSP);
 434                         NLA_PUT(skb, IWL_TM_ATTR_EEPROM,
 435                                 priv->cfg->base_params->eeprom_size,
 436                                 priv->eeprom);
 437                         status = cfg80211_testmode_reply(skb);
 438                         if (status < 0)
 439                                 IWL_DEBUG_INFO(priv,
 440                                                "Error sending msg : %d\n",
 441                                                status);
 442                 } else
 443                         return -EFAULT;
 444                 break;
 445
 446         default:
 447                 IWL_DEBUG_INFO(priv, "Unknown testmode driver command ID\n");
 448                 return -ENOSYS;
 449         }
 450         return status;
 451
 452 nla_put_failure:
 453         kfree_skb(skb);
 454         return -EMSGSIZE;
 455 }
 456
 457
 458 /*
 459  * This function handles the user application commands for uCode trace
 460  *
 461  * It retrieves command ID carried with IWL_TM_ATTR_COMMAND and calls to the
 462  * handlers respectively.
 463  *
 464  * If it's an unknown commdn ID, -ENOSYS is replied; otherwise, the returned
 465  * value of the actual command execution is replied to the user application.
 466  *
 467  * @hw: ieee80211_hw object that represents the device
 468  * @tb: gnl message fields from the user space
 469  */
 470 static int iwl_testmode_trace(struct ieee80211_hw *hw, struct nlattr **tb)
 471 {
 472         struct iwl_priv *priv = hw->priv;
 473         struct sk_buff *skb;
 474         int status = 0;
 475         struct device *dev = &priv->pci_dev->dev;
 476
 477         switch (nla_get_u32(tb[IWL_TM_ATTR_COMMAND])) {
 478         case IWL_TM_CMD_APP2DEV_BEGIN_TRACE:
 479                 if (priv->testmode_trace.trace_enabled)
 480                         return -EBUSY;
 481
 482                 priv->testmode_trace.cpu_addr =
 483                         dma_alloc_coherent(dev,
 484                                            TRACE_TOTAL_SIZE,
 485                                            &priv->testmode_trace.dma_addr,
 486                                            GFP_KERNEL);
 487                 if (!priv->testmode_trace.cpu_addr)
 488                         return -ENOMEM;
 489                 priv->testmode_trace.trace_enabled = true;
 490                 priv->testmode_trace.trace_addr = (u8 *)PTR_ALIGN(
 491                         priv->testmode_trace.cpu_addr, 0x100);
 492                 memset(priv->testmode_trace.trace_addr, 0x03B,
 493                         TRACE_BUFF_SIZE);
 494                 skb = cfg80211_testmode_alloc_reply_skb(hw->wiphy,
 495                         sizeof(priv->testmode_trace.dma_addr) + 20);
 496                 if (!skb) {
 497                         IWL_DEBUG_INFO(priv,
 498                                 "Error allocating memory\n");
 499                         iwl_trace_cleanup(priv);
 500                         return -ENOMEM;
 501                 }
 502                 NLA_PUT(skb, IWL_TM_ATTR_TRACE_ADDR,
 503                         sizeof(priv->testmode_trace.dma_addr),
 504                         (u64 *)&priv->testmode_trace.dma_addr);
 505                 status = cfg80211_testmode_reply(skb);
 506                 if (status < 0) {
 507                         IWL_DEBUG_INFO(priv,
 508                                        "Error sending msg : %d\n",
 509                                        status);
 510                 }
 511                 break;
 512
 513         case IWL_TM_CMD_APP2DEV_END_TRACE:
 514                 iwl_trace_cleanup(priv);
 515                 break;
 516
 517         case IWL_TM_CMD_APP2DEV_READ_TRACE:
 518                 if (priv->testmode_trace.trace_enabled &&
 519                     priv->testmode_trace.trace_addr) {
 520                         skb = cfg80211_testmode_alloc_reply_skb(hw->wiphy,
 521                                 20 + TRACE_BUFF_SIZE);
 522                         if (skb == NULL) {
 523                                 IWL_DEBUG_INFO(priv,
 524                                         "Error allocating memory\n");
 525                                 return -ENOMEM;
 526                         }
 527                         NLA_PUT(skb, IWL_TM_ATTR_TRACE_DATA,
 528                                 TRACE_BUFF_SIZE,
 529                                 priv->testmode_trace.trace_addr);
 530                         status = cfg80211_testmode_reply(skb);
 531                         if (status < 0) {
 532                                 IWL_DEBUG_INFO(priv,
 533                                        "Error sending msg : %d\n", status);
 534                         }
 535                 } else
 536                         return -EFAULT;
 537                 break;
 538
 539         default:
 540                 IWL_DEBUG_INFO(priv, "Unknown testmode mem command ID\n");
 541                 return -ENOSYS;
 542         }
 543         return status;
 544
 545 nla_put_failure:
 546         kfree_skb(skb);
 547         if (nla_get_u32(tb[IWL_TM_ATTR_COMMAND]) ==
 548             IWL_TM_CMD_APP2DEV_BEGIN_TRACE)
 549                 iwl_trace_cleanup(priv);
 550         return -EMSGSIZE;
 551 }
 552
 553 /* The testmode gnl message handler that takes the gnl message from the
 554  * user space and parses it per the policy iwl_testmode_gnl_msg_policy, then
 555  * invoke the corresponding handlers.
 556  *
 557  * This function is invoked when there is user space application sending
 558  * gnl message through the testmode tunnel NL80211_CMD_TESTMODE regulated
 559  * by nl80211.
 560  *
 561  * It retrieves the mandatory field, IWL_TM_ATTR_COMMAND, before
 562  * dispatching it to the corresponding handler.
 563  *
 564  * If IWL_TM_ATTR_COMMAND is missing, -ENOMSG is replied to user application;
 565  * -ENOSYS is replied to the user application if the command is unknown;
 566  * Otherwise, the command is dispatched to the respective handler.
 567  *
 568  * @hw: ieee80211_hw object that represents the device
 569  * @data: pointer to user space message
 570  * @len: length in byte of @data
 571  */
 572 int iwl_testmode_cmd(struct ieee80211_hw *hw, void *data, int len)
 573 {
 574         struct nlattr *tb[IWL_TM_ATTR_MAX - 1];
 575         struct iwl_priv *priv = hw->priv;
 576         int result;
 577
 578         result = nla_parse(tb, IWL_TM_ATTR_MAX - 1, data, len,
 579                         iwl_testmode_gnl_msg_policy);
 580         if (result != 0) {
 581                 IWL_DEBUG_INFO(priv,
 582                                "Error parsing the gnl message : %d\n", result);
 583                 return result;
 584         }
 585
 586         /* IWL_TM_ATTR_COMMAND is absolutely mandatory */
 587         if (!tb[IWL_TM_ATTR_COMMAND]) {
 588                 IWL_DEBUG_INFO(priv, "Error finding testmode command type\n");
 589                 return -ENOMSG;
 590         }
 591         /* in case multiple accesses to the device happens */
 592         mutex_lock(&priv->mutex);
 593
 594         switch (nla_get_u32(tb[IWL_TM_ATTR_COMMAND])) {
 595         case IWL_TM_CMD_APP2DEV_UCODE:
 596                 IWL_DEBUG_INFO(priv, "testmode cmd to uCode\n");
 597                 result = iwl_testmode_ucode(hw, tb);
 598                 break;
 599         case IWL_TM_CMD_APP2DEV_REG_READ32:
 600         case IWL_TM_CMD_APP2DEV_REG_WRITE32:
 601         case IWL_TM_CMD_APP2DEV_REG_WRITE8:
 602                 IWL_DEBUG_INFO(priv, "testmode cmd to register\n");
 603                 result = iwl_testmode_reg(hw, tb);
 604                 break;
 605         case IWL_TM_CMD_APP2DEV_GET_DEVICENAME:
 606         case IWL_TM_CMD_APP2DEV_LOAD_INIT_FW:
 607         case IWL_TM_CMD_APP2DEV_CFG_INIT_CALIB:
 608         case IWL_TM_CMD_APP2DEV_LOAD_RUNTIME_FW:
 609         case IWL_TM_CMD_APP2DEV_GET_EEPROM:
 610                 IWL_DEBUG_INFO(priv, "testmode cmd to driver\n");
 611                 result = iwl_testmode_driver(hw, tb);
 612                 break;
 613
 614         case IWL_TM_CMD_APP2DEV_BEGIN_TRACE:
 615         case IWL_TM_CMD_APP2DEV_END_TRACE:
 616         case IWL_TM_CMD_APP2DEV_READ_TRACE:
 617                 IWL_DEBUG_INFO(priv, "testmode uCode trace cmd to driver\n");
 618                 result = iwl_testmode_trace(hw, tb);
 619                 break;
 620
 621         default:
 622                 IWL_DEBUG_INFO(priv, "Unknown testmode command\n");
 623                 result = -ENOSYS;
 624                 break;
 625         }
 626
 627         mutex_unlock(&priv->mutex);
 628         return result;
 629 }