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 #include "iwl-trans.h"
  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.flags = CMD_ON_DEMAND;
 236         cmd.id = nla_get_u8(tb[IWL_TM_ATTR_UCODE_CMD_ID]);
 237         cmd.data[0] = nla_data(tb[IWL_TM_ATTR_UCODE_CMD_DATA]);
 238         cmd.len[0] = nla_len(tb[IWL_TM_ATTR_UCODE_CMD_DATA]);
 239         cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
 240         IWL_INFO(priv, "testmode ucode command ID 0x%x, flags 0x%x,"
 241                                 " len %d\n", cmd.id, cmd.flags, cmd.len[0]);
 242         /* ok, let's submit the command to ucode */
 243         return trans_send_cmd(priv, &cmd);
 244 }
 245
 246
 247 /*
 248  * This function handles the user application commands for register access.
 249  *
 250  * It retrieves command ID carried with IWL_TM_ATTR_COMMAND and calls to the
 251  * handlers respectively.
 252  *
 253  * If it's an unknown commdn ID, -ENOSYS is returned; or -ENOMSG if the
 254  * mandatory fields(IWL_TM_ATTR_REG_OFFSET,IWL_TM_ATTR_REG_VALUE32,
 255  * IWL_TM_ATTR_REG_VALUE8) are missing; Otherwise 0 is replied indicating
 256  * the success of the command execution.
 257  *
 258  * If IWL_TM_ATTR_COMMAND is IWL_TM_CMD_APP2DEV_REG_READ32, the register read
 259  * value is returned with IWL_TM_ATTR_REG_VALUE32.
 260  *
 261  * @hw: ieee80211_hw object that represents the device
 262  * @tb: gnl message fields from the user space
 263  */
 264 static int iwl_testmode_reg(struct ieee80211_hw *hw, struct nlattr **tb)
 265 {
 266         struct iwl_priv *priv = hw->priv;
 267         u32 ofs, val32;
 268         u8 val8;
 269         struct sk_buff *skb;
 270         int status = 0;
 271
 272         if (!tb[IWL_TM_ATTR_REG_OFFSET]) {
 273                 IWL_DEBUG_INFO(priv, "Error finding register offset\n");
 274                 return -ENOMSG;
 275         }
 276         ofs = nla_get_u32(tb[IWL_TM_ATTR_REG_OFFSET]);
 277         IWL_INFO(priv, "testmode register access command offset 0x%x\n", ofs);
 278
 279         switch (nla_get_u32(tb[IWL_TM_ATTR_COMMAND])) {
 280         case IWL_TM_CMD_APP2DEV_REG_READ32:
 281                 val32 = iwl_read32(priv, ofs);
 282                 IWL_INFO(priv, "32bit value to read 0x%x\n", val32);
 283
 284                 skb = cfg80211_testmode_alloc_reply_skb(hw->wiphy, 20);
 285                 if (!skb) {
 286                         IWL_DEBUG_INFO(priv, "Error allocating memory\n");
 287                         return -ENOMEM;
 288                 }
 289                 NLA_PUT_U32(skb, IWL_TM_ATTR_REG_VALUE32, val32);
 290                 status = cfg80211_testmode_reply(skb);
 291                 if (status < 0)
 292                         IWL_DEBUG_INFO(priv,
 293                                        "Error sending msg : %d\n", status);
 294                 break;
 295         case IWL_TM_CMD_APP2DEV_REG_WRITE32:
 296                 if (!tb[IWL_TM_ATTR_REG_VALUE32]) {
 297                         IWL_DEBUG_INFO(priv,
 298                                        "Error finding value to write\n");
 299                         return -ENOMSG;
 300                 } else {
 301                         val32 = nla_get_u32(tb[IWL_TM_ATTR_REG_VALUE32]);
 302                         IWL_INFO(priv, "32bit value to write 0x%x\n", val32);
 303                         iwl_write32(priv, ofs, val32);
 304                 }
 305                 break;
 306         case IWL_TM_CMD_APP2DEV_REG_WRITE8:
 307                 if (!tb[IWL_TM_ATTR_REG_VALUE8]) {
 308                         IWL_DEBUG_INFO(priv, "Error finding value to write\n");
 309                         return -ENOMSG;
 310                 } else {
 311                         val8 = nla_get_u8(tb[IWL_TM_ATTR_REG_VALUE8]);
 312                         IWL_INFO(priv, "8bit value to write 0x%x\n", val8);
 313                         iwl_write8(priv, ofs, val8);
 314                 }
 315                 break;
 316         default:
 317                 IWL_DEBUG_INFO(priv, "Unknown testmode register command ID\n");
 318                 return -ENOSYS;
 319         }
 320
 321         return status;
 322
 323 nla_put_failure:
 324         kfree_skb(skb);
 325         return -EMSGSIZE;
 326 }
 327
 328
 329 static int iwl_testmode_cfg_init_calib(struct iwl_priv *priv)
 330 {
 331         struct iwl_notification_wait calib_wait;
 332         int ret;
 333
 334         iwlagn_init_notification_wait(priv, &calib_wait,
 335                                       CALIBRATION_COMPLETE_NOTIFICATION,
 336                                       NULL, NULL);
 337         ret = iwlagn_init_alive_start(priv);
 338         if (ret) {
 339                 IWL_DEBUG_INFO(priv,
 340                         "Error configuring init calibration: %d\n", ret);
 341                 goto cfg_init_calib_error;
 342         }
 343
 344         ret = iwlagn_wait_notification(priv, &calib_wait, 2 * HZ);
 345         if (ret)
 346                 IWL_DEBUG_INFO(priv, "Error detecting"
 347                         " CALIBRATION_COMPLETE_NOTIFICATION: %d\n", ret);
 348         return ret;
 349
 350 cfg_init_calib_error:
 351         iwlagn_remove_notification(priv, &calib_wait);
 352         return ret;
 353 }
 354
 355 /*
 356  * This function handles the user application commands for driver.
 357  *
 358  * It retrieves command ID carried with IWL_TM_ATTR_COMMAND and calls to the
 359  * handlers respectively.
 360  *
 361  * If it's an unknown commdn ID, -ENOSYS is replied; otherwise, the returned
 362  * value of the actual command execution is replied to the user application.
 363  *
 364  * If there's any message responding to the user space, IWL_TM_ATTR_SYNC_RSP
 365  * is used for carry the message while IWL_TM_ATTR_COMMAND must set to
 366  * IWL_TM_CMD_DEV2APP_SYNC_RSP.
 367  *
 368  * @hw: ieee80211_hw object that represents the device
 369  * @tb: gnl message fields from the user space
 370  */
 371 static int iwl_testmode_driver(struct ieee80211_hw *hw, struct nlattr **tb)
 372 {
 373         struct iwl_priv *priv = hw->priv;
 374         struct sk_buff *skb;
 375         unsigned char *rsp_data_ptr = NULL;
 376         int status = 0, rsp_data_len = 0;
 377
 378         switch (nla_get_u32(tb[IWL_TM_ATTR_COMMAND])) {
 379         case IWL_TM_CMD_APP2DEV_GET_DEVICENAME:
 380                 rsp_data_ptr = (unsigned char *)priv->cfg->name;
 381                 rsp_data_len = strlen(priv->cfg->name);
 382                 skb = cfg80211_testmode_alloc_reply_skb(hw->wiphy,
 383                                                         rsp_data_len + 20);
 384                 if (!skb) {
 385                         IWL_DEBUG_INFO(priv,
 386                                        "Error allocating memory\n");
 387                         return -ENOMEM;
 388                 }
 389                 NLA_PUT_U32(skb, IWL_TM_ATTR_COMMAND,
 390                             IWL_TM_CMD_DEV2APP_SYNC_RSP);
 391                 NLA_PUT(skb, IWL_TM_ATTR_SYNC_RSP,
 392                         rsp_data_len, rsp_data_ptr);
 393                 status = cfg80211_testmode_reply(skb);
 394                 if (status < 0)
 395                         IWL_DEBUG_INFO(priv, "Error sending msg : %d\n",
 396                                        status);
 397                 break;
 398
 399         case IWL_TM_CMD_APP2DEV_LOAD_INIT_FW:
 400                 status = iwlagn_load_ucode_wait_alive(priv, &priv->ucode_init,
 401                                                       IWL_UCODE_INIT);
 402                 if (status)
 403                         IWL_DEBUG_INFO(priv,
 404                                 "Error loading init ucode: %d\n", status);
 405                 break;
 406
 407         case IWL_TM_CMD_APP2DEV_CFG_INIT_CALIB:
 408                 iwl_testmode_cfg_init_calib(priv);
 409                 iwlagn_stop_device(priv);
 410                 break;
 411
 412         case IWL_TM_CMD_APP2DEV_LOAD_RUNTIME_FW:
 413                 status = iwlagn_load_ucode_wait_alive(priv,
 414                                            &priv->ucode_rt,
 415                                            IWL_UCODE_REGULAR);
 416                 if (status) {
 417                         IWL_DEBUG_INFO(priv,
 418                                 "Error loading runtime ucode: %d\n", status);
 419                         break;
 420                 }
 421                 status = iwl_alive_start(priv);
 422                 if (status)
 423                         IWL_DEBUG_INFO(priv,
 424                                 "Error starting the device: %d\n", status);
 425                 break;
 426
 427         case IWL_TM_CMD_APP2DEV_GET_EEPROM:
 428                 if (priv->eeprom) {
 429                         skb = cfg80211_testmode_alloc_reply_skb(hw->wiphy,
 430                                 priv->cfg->base_params->eeprom_size + 20);
 431                         if (!skb) {
 432                                 IWL_DEBUG_INFO(priv,
 433                                        "Error allocating memory\n");
 434                                 return -ENOMEM;
 435                         }
 436                         NLA_PUT_U32(skb, IWL_TM_ATTR_COMMAND,
 437                                 IWL_TM_CMD_DEV2APP_EEPROM_RSP);
 438                         NLA_PUT(skb, IWL_TM_ATTR_EEPROM,
 439                                 priv->cfg->base_params->eeprom_size,
 440                                 priv->eeprom);
 441                         status = cfg80211_testmode_reply(skb);
 442                         if (status < 0)
 443                                 IWL_DEBUG_INFO(priv,
 444                                                "Error sending msg : %d\n",
 445                                                status);
 446                 } else
 447                         return -EFAULT;
 448                 break;
 449
 450         case IWL_TM_CMD_APP2DEV_FIXRATE_REQ:
 451                 if (!tb[IWL_TM_ATTR_FIXRATE]) {
 452                         IWL_DEBUG_INFO(priv,
 453                                        "Error finding fixrate setting\n");
 454                         return -ENOMSG;
 455                 }
 456                 priv->dbg_fixed_rate = nla_get_u32(tb[IWL_TM_ATTR_FIXRATE]);
 457                 break;
 458
 459         default:
 460                 IWL_DEBUG_INFO(priv, "Unknown testmode driver command ID\n");
 461                 return -ENOSYS;
 462         }
 463         return status;
 464
 465 nla_put_failure:
 466         kfree_skb(skb);
 467         return -EMSGSIZE;
 468 }
 469
 470
 471 /*
 472  * This function handles the user application commands for uCode trace
 473  *
 474  * It retrieves command ID carried with IWL_TM_ATTR_COMMAND and calls to the
 475  * handlers respectively.
 476  *
 477  * If it's an unknown commdn ID, -ENOSYS is replied; otherwise, the returned
 478  * value of the actual command execution is replied to the user application.
 479  *
 480  * @hw: ieee80211_hw object that represents the device
 481  * @tb: gnl message fields from the user space
 482  */
 483 static int iwl_testmode_trace(struct ieee80211_hw *hw, struct nlattr **tb)
 484 {
 485         struct iwl_priv *priv = hw->priv;
 486         struct sk_buff *skb;
 487         int status = 0;
 488         struct device *dev = priv->bus.dev;
 489
 490         switch (nla_get_u32(tb[IWL_TM_ATTR_COMMAND])) {
 491         case IWL_TM_CMD_APP2DEV_BEGIN_TRACE:
 492                 if (priv->testmode_trace.trace_enabled)
 493                         return -EBUSY;
 494
 495                 if (!tb[IWL_TM_ATTR_TRACE_SIZE])
 496                         priv->testmode_trace.buff_size = TRACE_BUFF_SIZE_DEF;
 497                 else
 498                         priv->testmode_trace.buff_size =
 499                                 nla_get_u32(tb[IWL_TM_ATTR_TRACE_SIZE]);
 500                 if (!priv->testmode_trace.buff_size)
 501                         return -EINVAL;
 502                 if (priv->testmode_trace.buff_size < TRACE_BUFF_SIZE_MIN ||
 503                     priv->testmode_trace.buff_size > TRACE_BUFF_SIZE_MAX)
 504                         return -EINVAL;
 505
 506                 priv->testmode_trace.total_size =
 507                         priv->testmode_trace.buff_size + TRACE_BUFF_PADD;
 508                 priv->testmode_trace.cpu_addr =
 509                         dma_alloc_coherent(dev,
 510                                            priv->testmode_trace.total_size,
 511                                            &priv->testmode_trace.dma_addr,
 512                                            GFP_KERNEL);
 513                 if (!priv->testmode_trace.cpu_addr)
 514                         return -ENOMEM;
 515                 priv->testmode_trace.trace_enabled = true;
 516                 priv->testmode_trace.trace_addr = (u8 *)PTR_ALIGN(
 517                         priv->testmode_trace.cpu_addr, 0x100);
 518                 memset(priv->testmode_trace.trace_addr, 0x03B,
 519                         priv->testmode_trace.buff_size);
 520                 skb = cfg80211_testmode_alloc_reply_skb(hw->wiphy,
 521                         sizeof(priv->testmode_trace.dma_addr) + 20);
 522                 if (!skb) {
 523                         IWL_DEBUG_INFO(priv,
 524                                 "Error allocating memory\n");
 525                         iwl_trace_cleanup(priv);
 526                         return -ENOMEM;
 527                 }
 528                 NLA_PUT(skb, IWL_TM_ATTR_TRACE_ADDR,
 529                         sizeof(priv->testmode_trace.dma_addr),
 530                         (u64 *)&priv->testmode_trace.dma_addr);
 531                 status = cfg80211_testmode_reply(skb);
 532                 if (status < 0) {
 533                         IWL_DEBUG_INFO(priv,
 534                                        "Error sending msg : %d\n",
 535                                        status);
 536                 }
 537                 priv->testmode_trace.num_chunks =
 538                         DIV_ROUND_UP(priv->testmode_trace.buff_size,
 539                                      TRACE_CHUNK_SIZE);
 540                 break;
 541
 542         case IWL_TM_CMD_APP2DEV_END_TRACE:
 543                 iwl_trace_cleanup(priv);
 544                 break;
 545         default:
 546                 IWL_DEBUG_INFO(priv, "Unknown testmode mem command ID\n");
 547                 return -ENOSYS;
 548         }
 549         return status;
 550
 551 nla_put_failure:
 552         kfree_skb(skb);
 553         if (nla_get_u32(tb[IWL_TM_ATTR_COMMAND]) ==
 554             IWL_TM_CMD_APP2DEV_BEGIN_TRACE)
 555                 iwl_trace_cleanup(priv);
 556         return -EMSGSIZE;
 557 }
 558
 559 static int iwl_testmode_trace_dump(struct ieee80211_hw *hw, struct nlattr **tb,
 560                                    struct sk_buff *skb,
 561                                    struct netlink_callback *cb)
 562 {
 563         struct iwl_priv *priv = hw->priv;
 564         int idx, length;
 565
 566         if (priv->testmode_trace.trace_enabled &&
 567             priv->testmode_trace.trace_addr) {
 568                 idx = cb->args[4];
 569                 if (idx >= priv->testmode_trace.num_chunks)
 570                         return -ENOENT;
 571                 length = TRACE_CHUNK_SIZE;
 572                 if (((idx + 1) == priv->testmode_trace.num_chunks) &&
 573                     (priv->testmode_trace.buff_size % TRACE_CHUNK_SIZE))
 574                         length = priv->testmode_trace.buff_size %
 575                                 TRACE_CHUNK_SIZE;
 576
 577                 NLA_PUT(skb, IWL_TM_ATTR_TRACE_DUMP, length,
 578                         priv->testmode_trace.trace_addr +
 579                         (TRACE_CHUNK_SIZE * idx));
 580                 idx++;
 581                 cb->args[4] = idx;
 582                 return 0;
 583         } else
 584                 return -EFAULT;
 585
 586  nla_put_failure:
 587         return -ENOBUFS;
 588 }
 589
 590 /* The testmode gnl message handler that takes the gnl message from the
 591  * user space and parses it per the policy iwl_testmode_gnl_msg_policy, then
 592  * invoke the corresponding handlers.
 593  *
 594  * This function is invoked when there is user space application sending
 595  * gnl message through the testmode tunnel NL80211_CMD_TESTMODE regulated
 596  * by nl80211.
 597  *
 598  * It retrieves the mandatory field, IWL_TM_ATTR_COMMAND, before
 599  * dispatching it to the corresponding handler.
 600  *
 601  * If IWL_TM_ATTR_COMMAND is missing, -ENOMSG is replied to user application;
 602  * -ENOSYS is replied to the user application if the command is unknown;
 603  * Otherwise, the command is dispatched to the respective handler.
 604  *
 605  * @hw: ieee80211_hw object that represents the device
 606  * @data: pointer to user space message
 607  * @len: length in byte of @data
 608  */
 609 int iwl_testmode_cmd(struct ieee80211_hw *hw, void *data, int len)
 610 {
 611         struct nlattr *tb[IWL_TM_ATTR_MAX - 1];
 612         struct iwl_priv *priv = hw->priv;
 613         int result;
 614
 615         result = nla_parse(tb, IWL_TM_ATTR_MAX - 1, data, len,
 616                         iwl_testmode_gnl_msg_policy);
 617         if (result != 0) {
 618                 IWL_DEBUG_INFO(priv,
 619                                "Error parsing the gnl message : %d\n", result);
 620                 return result;
 621         }
 622
 623         /* IWL_TM_ATTR_COMMAND is absolutely mandatory */
 624         if (!tb[IWL_TM_ATTR_COMMAND]) {
 625                 IWL_DEBUG_INFO(priv, "Error finding testmode command type\n");
 626                 return -ENOMSG;
 627         }
 628         /* in case multiple accesses to the device happens */
 629         mutex_lock(&priv->mutex);
 630
 631         switch (nla_get_u32(tb[IWL_TM_ATTR_COMMAND])) {
 632         case IWL_TM_CMD_APP2DEV_UCODE:
 633                 IWL_DEBUG_INFO(priv, "testmode cmd to uCode\n");
 634                 result = iwl_testmode_ucode(hw, tb);
 635                 break;
 636         case IWL_TM_CMD_APP2DEV_REG_READ32:
 637         case IWL_TM_CMD_APP2DEV_REG_WRITE32:
 638         case IWL_TM_CMD_APP2DEV_REG_WRITE8:
 639                 IWL_DEBUG_INFO(priv, "testmode cmd to register\n");
 640                 result = iwl_testmode_reg(hw, tb);
 641                 break;
 642         case IWL_TM_CMD_APP2DEV_GET_DEVICENAME:
 643         case IWL_TM_CMD_APP2DEV_LOAD_INIT_FW:
 644         case IWL_TM_CMD_APP2DEV_CFG_INIT_CALIB:
 645         case IWL_TM_CMD_APP2DEV_LOAD_RUNTIME_FW:
 646         case IWL_TM_CMD_APP2DEV_GET_EEPROM:
 647         case IWL_TM_CMD_APP2DEV_FIXRATE_REQ:
 648                 IWL_DEBUG_INFO(priv, "testmode cmd to driver\n");
 649                 result = iwl_testmode_driver(hw, tb);
 650                 break;
 651
 652         case IWL_TM_CMD_APP2DEV_BEGIN_TRACE:
 653         case IWL_TM_CMD_APP2DEV_END_TRACE:
 654         case IWL_TM_CMD_APP2DEV_READ_TRACE:
 655                 IWL_DEBUG_INFO(priv, "testmode uCode trace cmd to driver\n");
 656                 result = iwl_testmode_trace(hw, tb);
 657                 break;
 658
 659         default:
 660                 IWL_DEBUG_INFO(priv, "Unknown testmode command\n");
 661                 result = -ENOSYS;
 662                 break;
 663         }
 664
 665         mutex_unlock(&priv->mutex);
 666         return result;
 667 }
 668
 669 int iwl_testmode_dump(struct ieee80211_hw *hw, struct sk_buff *skb,
 670                       struct netlink_callback *cb,
 671                       void *data, int len)
 672 {
 673         struct nlattr *tb[IWL_TM_ATTR_MAX];
 674         struct iwl_priv *priv = hw->priv;
 675         int result;
 676         u32 cmd;
 677
 678         if (cb->args[3]) {
 679                 /* offset by 1 since commands start at 0 */
 680                 cmd = cb->args[3] - 1;
 681         } else {
 682                 result = nla_parse(tb, IWL_TM_ATTR_MAX - 1, data, len,
 683                                 iwl_testmode_gnl_msg_policy);
 684                 if (result) {
 685                         IWL_DEBUG_INFO(priv,
 686                                "Error parsing the gnl message : %d\n", result);
 687                         return result;
 688                 }
 689
 690                 /* IWL_TM_ATTR_COMMAND is absolutely mandatory */
 691                 if (!tb[IWL_TM_ATTR_COMMAND]) {
 692                         IWL_DEBUG_INFO(priv,
 693                                 "Error finding testmode command type\n");
 694                         return -ENOMSG;
 695                 }
 696                 cmd = nla_get_u32(tb[IWL_TM_ATTR_COMMAND]);
 697                 cb->args[3] = cmd + 1;
 698         }
 699
 700         /* in case multiple accesses to the device happens */
 701         mutex_lock(&priv->mutex);
 702         switch (cmd) {
 703         case IWL_TM_CMD_APP2DEV_READ_TRACE:
 704                 IWL_DEBUG_INFO(priv, "uCode trace cmd to driver\n");
 705                 result = iwl_testmode_trace_dump(hw, tb, skb, cb);
 706                 break;
 707         default:
 708                 result = -EINVAL;
 709                 break;
 710         }
 711
 712         mutex_unlock(&priv->mutex);
 713         return result;
 714 }