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.
  18  *
  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 <ilw@linux.intel.com>
  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 #include "iwl-dev.h"
  73 #include "iwl-core.h"
  74 #include "iwl-debug.h"
  75 #include "iwl-fh.h"
  76 #include "iwl-io.h"
  77 #include "iwl-agn.h"
  78 #include "iwl-testmode.h"
  79
  80
  81 /* The TLVs used in the gnl message policy between the kernel module and
  82  * user space application. iwl_testmode_gnl_msg_policy is to be carried
  83  * through the NL80211_CMD_TESTMODE channel regulated by nl80211.
  84  * See iwl-testmode.h
  85  */
  86 static
  87 struct nla_policy iwl_testmode_gnl_msg_policy[IWL_TM_ATTR_MAX] = {
  88         [IWL_TM_ATTR_COMMAND] = { .type = NLA_U32, },
  89
  90         [IWL_TM_ATTR_UCODE_CMD_ID] = { .type = NLA_U8, },
  91         [IWL_TM_ATTR_UCODE_CMD_DATA] = { .type = NLA_UNSPEC, },
  92
  93         [IWL_TM_ATTR_REG_OFFSET] = { .type = NLA_U32, },
  94         [IWL_TM_ATTR_REG_VALUE8] = { .type = NLA_U8, },
  95         [IWL_TM_ATTR_REG_VALUE32] = { .type = NLA_U32, },
  96
  97         [IWL_TM_ATTR_SYNC_RSP] = { .type = NLA_UNSPEC, },
  98         [IWL_TM_ATTR_UCODE_RX_PKT] = { .type = NLA_UNSPEC, },
  99
 100         [IWL_TM_ATTR_EEPROM] = { .type = NLA_UNSPEC, },
 101
 102         [IWL_TM_ATTR_TRACE_ADDR] = { .type = NLA_UNSPEC, },
 103         [IWL_TM_ATTR_TRACE_DUMP] = { .type = NLA_UNSPEC, },
 104         [IWL_TM_ATTR_TRACE_SIZE] = { .type = NLA_U32, },
 105
 106         [IWL_TM_ATTR_FIXRATE] = { .type = NLA_U32, },
 107
 108 };
 109
 110 /*
 111  * See the struct iwl_rx_packet in iwl-commands.h for the format of the
 112  * received events from the device
 113  */
 114 static inline int get_event_length(struct iwl_rx_mem_buffer *rxb)
 115 {
 116         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 117         if (pkt)
 118                 return le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
 119         else
 120                 return 0;
 121 }
 122
 123
 124 /*
 125  * This function multicasts the spontaneous messages from the device to the
 126  * user space. It is invoked whenever there is a received messages
 127  * from the device. This function is called within the ISR of the rx handlers
 128  * in iwlagn driver.
 129  *
 130  * The parsing of the message content is left to the user space application,
 131  * The message content is treated as unattacked raw data and is encapsulated
 132  * with IWL_TM_ATTR_UCODE_RX_PKT multicasting to the user space.
 133  *
 134  * @priv: the instance of iwlwifi device
 135  * @rxb: pointer to rx data content received by the ISR
 136  *
 137  * See the message policies and TLVs in iwl_testmode_gnl_msg_policy[].
 138  * For the messages multicasting to the user application, the mandatory
 139  * TLV fields are :
 140  *      IWL_TM_ATTR_COMMAND must be IWL_TM_CMD_DEV2APP_UCODE_RX_PKT
 141  *      IWL_TM_ATTR_UCODE_RX_PKT for carrying the message content
 142  */
 143
 144 static void iwl_testmode_ucode_rx_pkt(struct iwl_priv *priv,
 145                                 struct iwl_rx_mem_buffer *rxb)
 146 {
 147         struct ieee80211_hw *hw = priv->hw;
 148         struct sk_buff *skb;
 149         void *data;
 150         int length;
 151
 152         data = (void *)rxb_addr(rxb);
 153         length = get_event_length(rxb);
 154
 155         if (!data || length == 0)
 156                 return;
 157
 158         skb = cfg80211_testmode_alloc_event_skb(hw->wiphy, 20 + length,
 159                                                                 GFP_ATOMIC);
 160         if (skb == NULL) {
 161                 IWL_DEBUG_INFO(priv,
 162                          "Run out of memory for messages to user space ?\n");
 163                 return;
 164         }
 165         NLA_PUT_U32(skb, IWL_TM_ATTR_COMMAND, IWL_TM_CMD_DEV2APP_UCODE_RX_PKT);
 166         NLA_PUT(skb, IWL_TM_ATTR_UCODE_RX_PKT, length, data);
 167         cfg80211_testmode_event(skb, GFP_ATOMIC);
 168         return;
 169
 170 nla_put_failure:
 171         kfree_skb(skb);
 172         IWL_DEBUG_INFO(priv, "Ouch, overran buffer, check allocation!\n");
 173 }
 174
 175 void iwl_testmode_init(struct iwl_priv *priv)
 176 {
 177         priv->pre_rx_handler = iwl_testmode_ucode_rx_pkt;
 178         priv->testmode_trace.trace_enabled = false;
 179 }
 180
 181 static void iwl_trace_cleanup(struct iwl_priv *priv)
 182 {
 183         struct device *dev = priv->bus.dev;
 184
 185         if (priv->testmode_trace.trace_enabled) {
 186                 if (priv->testmode_trace.cpu_addr &&
 187                     priv->testmode_trace.dma_addr)
 188                         dma_free_coherent(dev,
 189                                         priv->testmode_trace.total_size,
 190                                         priv->testmode_trace.cpu_addr,
 191                                         priv->testmode_trace.dma_addr);
 192                 priv->testmode_trace.trace_enabled = false;
 193                 priv->testmode_trace.cpu_addr = NULL;
 194                 priv->testmode_trace.trace_addr = NULL;
 195                 priv->testmode_trace.dma_addr = 0;
 196                 priv->testmode_trace.buff_size = 0;
 197                 priv->testmode_trace.total_size = 0;
 198         }
 199 }
 200
 201
 202 void iwl_testmode_cleanup(struct iwl_priv *priv)
 203 {
 204         iwl_trace_cleanup(priv);
 205 }
 206
 207 /*
 208  * This function handles the user application commands to the ucode.
 209  *
 210  * It retrieves the mandatory fields IWL_TM_ATTR_UCODE_CMD_ID and
 211  * IWL_TM_ATTR_UCODE_CMD_DATA and calls to the handler to send the
 212  * host command to the ucode.
 213  *
 214  * If any mandatory field is missing, -ENOMSG is replied to the user space
 215  * application; otherwise, the actual execution result of the host command to
 216  * ucode is replied.
 217  *
 218  * @hw: ieee80211_hw object that represents the device
 219  * @tb: gnl message fields from the user space
 220  */
 221 static int iwl_testmode_ucode(struct ieee80211_hw *hw, struct nlattr **tb)
 222 {
 223         struct iwl_priv *priv = hw->priv;
 224         struct iwl_host_cmd cmd;
 225
 226         memset(&cmd, 0, sizeof(struct iwl_host_cmd));
 227
 228         if (!tb[IWL_TM_ATTR_UCODE_CMD_ID] ||
 229             !tb[IWL_TM_ATTR_UCODE_CMD_DATA]) {
 230                 IWL_DEBUG_INFO(priv,
 231                         "Error finding ucode command mandatory fields\n");
 232                 return -ENOMSG;
 233         }
 234
 235         cmd.id = nla_get_u8(tb[IWL_TM_ATTR_UCODE_CMD_ID]);
 236         cmd.data[0] = nla_data(tb[IWL_TM_ATTR_UCODE_CMD_DATA]);
 237         cmd.len[0] = nla_len(tb[IWL_TM_ATTR_UCODE_CMD_DATA]);
 238         cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
 239         IWL_INFO(priv, "testmode ucode command ID 0x%x, flags 0x%x,"
 240                                 " len %d\n", cmd.id, cmd.flags, cmd.len[0]);
 241         /* ok, let's submit the command to ucode */
 242         return iwl_send_cmd(priv, &cmd);
 243 }
 244
 245
 246 /*
 247  * This function handles the user application commands for register access.
 248  *
 249  * It retrieves command ID carried with IWL_TM_ATTR_COMMAND and calls to the
 250  * handlers respectively.
 251  *
 252  * If it's an unknown commdn ID, -ENOSYS is returned; or -ENOMSG if the
 253  * mandatory fields(IWL_TM_ATTR_REG_OFFSET,IWL_TM_ATTR_REG_VALUE32,
 254  * IWL_TM_ATTR_REG_VALUE8) are missing; Otherwise 0 is replied indicating
 255  * the success of the command execution.
 256  *
 257  * If IWL_TM_ATTR_COMMAND is IWL_TM_CMD_APP2DEV_REG_READ32, the register read
 258  * value is returned with IWL_TM_ATTR_REG_VALUE32.
 259  *
 260  * @hw: ieee80211_hw object that represents the device
 261  * @tb: gnl message fields from the user space
 262  */
 263 static int iwl_testmode_reg(struct ieee80211_hw *hw, struct nlattr **tb)
 264 {
 265         struct iwl_priv *priv = hw->priv;
 266         u32 ofs, val32;
 267         u8 val8;
 268         struct sk_buff *skb;
 269         int status = 0;
 270
 271         if (!tb[IWL_TM_ATTR_REG_OFFSET]) {
 272                 IWL_DEBUG_INFO(priv, "Error finding register offset\n");
 273                 return -ENOMSG;
 274         }
 275         ofs = nla_get_u32(tb[IWL_TM_ATTR_REG_OFFSET]);
 276         IWL_INFO(priv, "testmode register access command offset 0x%x\n", ofs);
 277
 278         switch (nla_get_u32(tb[IWL_TM_ATTR_COMMAND])) {
 279         case IWL_TM_CMD_APP2DEV_REG_READ32:
 280                 val32 = iwl_read32(priv, ofs);
 281                 IWL_INFO(priv, "32bit value to read 0x%x\n", val32);
 282
 283                 skb = cfg80211_testmode_alloc_reply_skb(hw->wiphy, 20);
 284                 if (!skb) {
 285                         IWL_DEBUG_INFO(priv, "Error allocating memory\n");
 286                         return -ENOMEM;
 287                 }
 288                 NLA_PUT_U32(skb, IWL_TM_ATTR_REG_VALUE32, val32);
 289                 status = cfg80211_testmode_reply(skb);
 290                 if (status < 0)
 291                         IWL_DEBUG_INFO(priv,
 292                                        "Error sending msg : %d\n", status);
 293                 break;
 294         case IWL_TM_CMD_APP2DEV_REG_WRITE32:
 295                 if (!tb[IWL_TM_ATTR_REG_VALUE32]) {
 296                         IWL_DEBUG_INFO(priv,
 297                                        "Error finding value to write\n");
 298                         return -ENOMSG;
 299                 } else {
 300                         val32 = nla_get_u32(tb[IWL_TM_ATTR_REG_VALUE32]);
 301                         IWL_INFO(priv, "32bit value to write 0x%x\n", val32);
 302                         iwl_write32(priv, ofs, val32);
 303                 }
 304                 break;
 305         case IWL_TM_CMD_APP2DEV_REG_WRITE8:
 306                 if (!tb[IWL_TM_ATTR_REG_VALUE8]) {
 307                         IWL_DEBUG_INFO(priv, "Error finding value to write\n");
 308                         return -ENOMSG;
 309                 } else {
 310                         val8 = nla_get_u8(tb[IWL_TM_ATTR_REG_VALUE8]);
 311                         IWL_INFO(priv, "8bit value to write 0x%x\n", val8);
 312                         iwl_write8(priv, ofs, val8);
 313                 }
 314                 break;
 315         default:
 316                 IWL_DEBUG_INFO(priv, "Unknown testmode register command ID\n");
 317                 return -ENOSYS;
 318         }
 319
 320         return status;
 321
 322 nla_put_failure:
 323         kfree_skb(skb);
 324         return -EMSGSIZE;
 325 }
 326
 327
 328 static int iwl_testmode_cfg_init_calib(struct iwl_priv *priv)
 329 {
 330         struct iwl_notification_wait calib_wait;
 331         int ret;
 332
 333         iwlagn_init_notification_wait(priv, &calib_wait,
 334                                       CALIBRATION_COMPLETE_NOTIFICATION,
 335                                       NULL, NULL);
 336         ret = iwlagn_init_alive_start(priv);
 337         if (ret) {
 338                 IWL_DEBUG_INFO(priv,
 339                         "Error configuring init calibration: %d\n", ret);
 340                 goto cfg_init_calib_error;
 341         }
 342
 343         ret = iwlagn_wait_notification(priv, &calib_wait, 2 * HZ);
 344         if (ret)
 345                 IWL_DEBUG_INFO(priv, "Error detecting"
 346                         " CALIBRATION_COMPLETE_NOTIFICATION: %d\n", ret);
 347         return ret;
 348
 349 cfg_init_calib_error:
 350         iwlagn_remove_notification(priv, &calib_wait);
 351         return ret;
 352 }
 353
 354 /*
 355  * This function handles the user application commands for driver.
 356  *
 357  * It retrieves command ID carried with IWL_TM_ATTR_COMMAND and calls to the
 358  * handlers respectively.
 359  *
 360  * If it's an unknown commdn ID, -ENOSYS is replied; otherwise, the returned
 361  * value of the actual command execution is replied to the user application.
 362  *
 363  * If there's any message responding to the user space, IWL_TM_ATTR_SYNC_RSP
 364  * is used for carry the message while IWL_TM_ATTR_COMMAND must set to
 365  * IWL_TM_CMD_DEV2APP_SYNC_RSP.
 366  *
 367  * @hw: ieee80211_hw object that represents the device
 368  * @tb: gnl message fields from the user space
 369  */
 370 static int iwl_testmode_driver(struct ieee80211_hw *hw, struct nlattr **tb)
 371 {
 372         struct iwl_priv *priv = hw->priv;
 373         struct sk_buff *skb;
 374         unsigned char *rsp_data_ptr = NULL;
 375         int status = 0, rsp_data_len = 0;
 376
 377         switch (nla_get_u32(tb[IWL_TM_ATTR_COMMAND])) {
 378         case IWL_TM_CMD_APP2DEV_GET_DEVICENAME:
 379                 rsp_data_ptr = (unsigned char *)priv->cfg->name;
 380                 rsp_data_len = strlen(priv->cfg->name);
 381                 skb = cfg80211_testmode_alloc_reply_skb(hw->wiphy,
 382                                                         rsp_data_len + 20);
 383                 if (!skb) {
 384                         IWL_DEBUG_INFO(priv,
 385                                        "Error allocating memory\n");
 386                         return -ENOMEM;
 387                 }
 388                 NLA_PUT_U32(skb, IWL_TM_ATTR_COMMAND,
 389                             IWL_TM_CMD_DEV2APP_SYNC_RSP);
 390                 NLA_PUT(skb, IWL_TM_ATTR_SYNC_RSP,
 391                         rsp_data_len, rsp_data_ptr);
 392                 status = cfg80211_testmode_reply(skb);
 393                 if (status < 0)
 394                         IWL_DEBUG_INFO(priv, "Error sending msg : %d\n",
 395                                        status);
 396                 break;
 397
 398         case IWL_TM_CMD_APP2DEV_LOAD_INIT_FW:
 399                 status = iwlagn_load_ucode_wait_alive(priv, &priv->ucode_init,
 400                                                       IWL_UCODE_INIT);
 401                 if (status)
 402                         IWL_DEBUG_INFO(priv,
 403                                 "Error loading init ucode: %d\n", status);
 404                 break;
 405
 406         case IWL_TM_CMD_APP2DEV_CFG_INIT_CALIB:
 407                 iwl_testmode_cfg_init_calib(priv);
 408                 iwlagn_stop_device(priv);
 409                 break;
 410
 411         case IWL_TM_CMD_APP2DEV_LOAD_RUNTIME_FW:
 412                 status = iwlagn_load_ucode_wait_alive(priv,
 413                                            &priv->ucode_rt,
 414                                            IWL_UCODE_REGULAR);
 415                 if (status) {
 416                         IWL_DEBUG_INFO(priv,
 417                                 "Error loading runtime ucode: %d\n", status);
 418                         break;
 419                 }
 420                 status = iwl_alive_start(priv);
 421                 if (status)
 422                         IWL_DEBUG_INFO(priv,
 423                                 "Error starting the device: %d\n", status);
 424                 break;
 425
 426         case IWL_TM_CMD_APP2DEV_GET_EEPROM:
 427                 if (priv->eeprom) {
 428                         skb = cfg80211_testmode_alloc_reply_skb(hw->wiphy,
 429                                 priv->cfg->base_params->eeprom_size + 20);
 430                         if (!skb) {
 431                                 IWL_DEBUG_INFO(priv,
 432                                        "Error allocating memory\n");
 433                                 return -ENOMEM;
 434                         }
 435                         NLA_PUT_U32(skb, IWL_TM_ATTR_COMMAND,
 436                                 IWL_TM_CMD_DEV2APP_EEPROM_RSP);
 437                         NLA_PUT(skb, IWL_TM_ATTR_EEPROM,
 438                                 priv->cfg->base_params->eeprom_size,
 439                                 priv->eeprom);
 440                         status = cfg80211_testmode_reply(skb);
 441                         if (status < 0)
 442                                 IWL_DEBUG_INFO(priv,
 443                                                "Error sending msg : %d\n",
 444                                                status);
 445                 } else
 446                         return -EFAULT;
 447                 break;
 448
 449         case IWL_TM_CMD_APP2DEV_FIXRATE_REQ:
 450                 if (!tb[IWL_TM_ATTR_FIXRATE]) {
 451                         IWL_DEBUG_INFO(priv,
 452                                        "Error finding fixrate setting\n");
 453                         return -ENOMSG;
 454                 }
 455                 priv->dbg_fixed_rate = nla_get_u32(tb[IWL_TM_ATTR_FIXRATE]);
 456                 break;
 457
 458         default:
 459                 IWL_DEBUG_INFO(priv, "Unknown testmode driver command ID\n");
 460                 return -ENOSYS;
 461         }
 462         return status;
 463
 464 nla_put_failure:
 465         kfree_skb(skb);
 466         return -EMSGSIZE;
 467 }
 468
 469
 470 /*
 471  * This function handles the user application commands for uCode trace
 472  *
 473  * It retrieves command ID carried with IWL_TM_ATTR_COMMAND and calls to the
 474  * handlers respectively.
 475  *
 476  * If it's an unknown commdn ID, -ENOSYS is replied; otherwise, the returned
 477  * value of the actual command execution is replied to the user application.
 478  *
 479  * @hw: ieee80211_hw object that represents the device
 480  * @tb: gnl message fields from the user space
 481  */
 482 static int iwl_testmode_trace(struct ieee80211_hw *hw, struct nlattr **tb)
 483 {
 484         struct iwl_priv *priv = hw->priv;
 485         struct sk_buff *skb;
 486         int status = 0;
 487         struct device *dev = priv->bus.dev;
 488
 489         switch (nla_get_u32(tb[IWL_TM_ATTR_COMMAND])) {
 490         case IWL_TM_CMD_APP2DEV_BEGIN_TRACE:
 491                 if (priv->testmode_trace.trace_enabled)
 492                         return -EBUSY;
 493
 494                 if (!tb[IWL_TM_ATTR_TRACE_SIZE])
 495                         priv->testmode_trace.buff_size = TRACE_BUFF_SIZE_DEF;
 496                 else
 497                         priv->testmode_trace.buff_size =
 498                                 nla_get_u32(tb[IWL_TM_ATTR_TRACE_SIZE]);
 499                 if (!priv->testmode_trace.buff_size)
 500                         return -EINVAL;
 501                 if (priv->testmode_trace.buff_size < TRACE_BUFF_SIZE_MIN ||
 502                     priv->testmode_trace.buff_size > TRACE_BUFF_SIZE_MAX)
 503                         return -EINVAL;
 504
 505                 priv->testmode_trace.total_size =
 506                         priv->testmode_trace.buff_size + TRACE_BUFF_PADD;
 507                 priv->testmode_trace.cpu_addr =
 508                         dma_alloc_coherent(dev,
 509                                            priv->testmode_trace.total_size,
 510                                            &priv->testmode_trace.dma_addr,
 511                                            GFP_KERNEL);
 512                 if (!priv->testmode_trace.cpu_addr)
 513                         return -ENOMEM;
 514                 priv->testmode_trace.trace_enabled = true;
 515                 priv->testmode_trace.trace_addr = (u8 *)PTR_ALIGN(
 516                         priv->testmode_trace.cpu_addr, 0x100);
 517                 memset(priv->testmode_trace.trace_addr, 0x03B,
 518                         priv->testmode_trace.buff_size);
 519                 skb = cfg80211_testmode_alloc_reply_skb(hw->wiphy,
 520                         sizeof(priv->testmode_trace.dma_addr) + 20);
 521                 if (!skb) {
 522                         IWL_DEBUG_INFO(priv,
 523                                 "Error allocating memory\n");
 524                         iwl_trace_cleanup(priv);
 525                         return -ENOMEM;
 526                 }
 527                 NLA_PUT(skb, IWL_TM_ATTR_TRACE_ADDR,
 528                         sizeof(priv->testmode_trace.dma_addr),
 529                         (u64 *)&priv->testmode_trace.dma_addr);
 530                 status = cfg80211_testmode_reply(skb);
 531                 if (status < 0) {
 532                         IWL_DEBUG_INFO(priv,
 533                                        "Error sending msg : %d\n",
 534                                        status);
 535                 }
 536                 priv->testmode_trace.num_chunks =
 537                         DIV_ROUND_UP(priv->testmode_trace.buff_size,
 538                                      TRACE_CHUNK_SIZE);
 539                 break;
 540
 541         case IWL_TM_CMD_APP2DEV_END_TRACE:
 542                 iwl_trace_cleanup(priv);
 543                 break;
 544         default:
 545                 IWL_DEBUG_INFO(priv, "Unknown testmode mem command ID\n");
 546                 return -ENOSYS;
 547         }
 548         return status;
 549
 550 nla_put_failure:
 551         kfree_skb(skb);
 552         if (nla_get_u32(tb[IWL_TM_ATTR_COMMAND]) ==
 553             IWL_TM_CMD_APP2DEV_BEGIN_TRACE)
 554                 iwl_trace_cleanup(priv);
 555         return -EMSGSIZE;
 556 }
 557
 558 static int iwl_testmode_trace_dump(struct ieee80211_hw *hw, struct nlattr **tb,
 559                                    struct sk_buff *skb,
 560                                    struct netlink_callback *cb)
 561 {
 562         struct iwl_priv *priv = hw->priv;
 563         int idx, length;
 564
 565         if (priv->testmode_trace.trace_enabled &&
 566             priv->testmode_trace.trace_addr) {
 567                 idx = cb->args[4];
 568                 if (idx >= priv->testmode_trace.num_chunks)
 569                         return -ENOENT;
 570                 length = TRACE_CHUNK_SIZE;
 571                 if (((idx + 1) == priv->testmode_trace.num_chunks) &&
 572                     (priv->testmode_trace.buff_size % TRACE_CHUNK_SIZE))
 573                         length = priv->testmode_trace.buff_size %
 574                                 TRACE_CHUNK_SIZE;
 575
 576                 NLA_PUT(skb, IWL_TM_ATTR_TRACE_DUMP, length,
 577                         priv->testmode_trace.trace_addr +
 578                         (TRACE_CHUNK_SIZE * idx));
 579                 idx++;
 580                 cb->args[4] = idx;
 581                 return 0;
 582         } else
 583                 return -EFAULT;
 584
 585  nla_put_failure:
 586         return -ENOBUFS;
 587 }
 588
 589 /* The testmode gnl message handler that takes the gnl message from the
 590  * user space and parses it per the policy iwl_testmode_gnl_msg_policy, then
 591  * invoke the corresponding handlers.
 592  *
 593  * This function is invoked when there is user space application sending
 594  * gnl message through the testmode tunnel NL80211_CMD_TESTMODE regulated
 595  * by nl80211.
 596  *
 597  * It retrieves the mandatory field, IWL_TM_ATTR_COMMAND, before
 598  * dispatching it to the corresponding handler.
 599  *
 600  * If IWL_TM_ATTR_COMMAND is missing, -ENOMSG is replied to user application;
 601  * -ENOSYS is replied to the user application if the command is unknown;
 602  * Otherwise, the command is dispatched to the respective handler.
 603  *
 604  * @hw: ieee80211_hw object that represents the device
 605  * @data: pointer to user space message
 606  * @len: length in byte of @data
 607  */
 608 int iwl_testmode_cmd(struct ieee80211_hw *hw, void *data, int len)
 609 {
 610         struct nlattr *tb[IWL_TM_ATTR_MAX - 1];
 611         struct iwl_priv *priv = hw->priv;
 612         int result;
 613
 614         result = nla_parse(tb, IWL_TM_ATTR_MAX - 1, data, len,
 615                         iwl_testmode_gnl_msg_policy);
 616         if (result != 0) {
 617                 IWL_DEBUG_INFO(priv,
 618                                "Error parsing the gnl message : %d\n", result);
 619                 return result;
 620         }
 621
 622         /* IWL_TM_ATTR_COMMAND is absolutely mandatory */
 623         if (!tb[IWL_TM_ATTR_COMMAND]) {
 624                 IWL_DEBUG_INFO(priv, "Error finding testmode command type\n");
 625                 return -ENOMSG;
 626         }
 627         /* in case multiple accesses to the device happens */
 628         mutex_lock(&priv->mutex);
 629
 630         switch (nla_get_u32(tb[IWL_TM_ATTR_COMMAND])) {
 631         case IWL_TM_CMD_APP2DEV_UCODE:
 632                 IWL_DEBUG_INFO(priv, "testmode cmd to uCode\n");
 633                 result = iwl_testmode_ucode(hw, tb);
 634                 break;
 635         case IWL_TM_CMD_APP2DEV_REG_READ32:
 636         case IWL_TM_CMD_APP2DEV_REG_WRITE32:
 637         case IWL_TM_CMD_APP2DEV_REG_WRITE8:
 638                 IWL_DEBUG_INFO(priv, "testmode cmd to register\n");
 639                 result = iwl_testmode_reg(hw, tb);
 640                 break;
 641         case IWL_TM_CMD_APP2DEV_GET_DEVICENAME:
 642         case IWL_TM_CMD_APP2DEV_LOAD_INIT_FW:
 643         case IWL_TM_CMD_APP2DEV_CFG_INIT_CALIB:
 644         case IWL_TM_CMD_APP2DEV_LOAD_RUNTIME_FW:
 645         case IWL_TM_CMD_APP2DEV_GET_EEPROM:
 646         case IWL_TM_CMD_APP2DEV_FIXRATE_REQ:
 647                 IWL_DEBUG_INFO(priv, "testmode cmd to driver\n");
 648                 result = iwl_testmode_driver(hw, tb);
 649                 break;
 650
 651         case IWL_TM_CMD_APP2DEV_BEGIN_TRACE:
 652         case IWL_TM_CMD_APP2DEV_END_TRACE:
 653         case IWL_TM_CMD_APP2DEV_READ_TRACE:
 654                 IWL_DEBUG_INFO(priv, "testmode uCode trace cmd to driver\n");
 655                 result = iwl_testmode_trace(hw, tb);
 656                 break;
 657
 658         default:
 659                 IWL_DEBUG_INFO(priv, "Unknown testmode command\n");
 660                 result = -ENOSYS;
 661                 break;
 662         }
 663
 664         mutex_unlock(&priv->mutex);
 665         return result;
 666 }
 667
 668 int iwl_testmode_dump(struct ieee80211_hw *hw, struct sk_buff *skb,
 669                       struct netlink_callback *cb,
 670                       void *data, int len)
 671 {
 672         struct nlattr *tb[IWL_TM_ATTR_MAX];
 673         struct iwl_priv *priv = hw->priv;
 674         int result;
 675         u32 cmd;
 676
 677         if (cb->args[3]) {
 678                 /* offset by 1 since commands start at 0 */
 679                 cmd = cb->args[3] - 1;
 680         } else {
 681                 result = nla_parse(tb, IWL_TM_ATTR_MAX - 1, data, len,
 682                                 iwl_testmode_gnl_msg_policy);
 683                 if (result) {
 684                         IWL_DEBUG_INFO(priv,
 685                                "Error parsing the gnl message : %d\n", result);
 686                         return result;
 687                 }
 688
 689                 /* IWL_TM_ATTR_COMMAND is absolutely mandatory */
 690                 if (!tb[IWL_TM_ATTR_COMMAND]) {
 691                         IWL_DEBUG_INFO(priv,
 692                                 "Error finding testmode command type\n");
 693                         return -ENOMSG;
 694                 }
 695                 cmd = nla_get_u32(tb[IWL_TM_ATTR_COMMAND]);
 696                 cb->args[3] = cmd + 1;
 697         }
 698
 699         /* in case multiple accesses to the device happens */
 700         mutex_lock(&priv->mutex);
 701         switch (cmd) {
 702         case IWL_TM_CMD_APP2DEV_READ_TRACE:
 703                 IWL_DEBUG_INFO(priv, "uCode trace cmd to driver\n");
 704                 result = iwl_testmode_trace_dump(hw, tb, skb, cb);
 705                 break;
 706         default:
 707                 result = -EINVAL;
 708                 break;
 709         }
 710
 711         mutex_unlock(&priv->mutex);
 712         return result;
 713 }