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
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  20  * along with this program; if not, write to the Free Software
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  22  * USA
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  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.
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  37  * modification, are permitted provided that the following conditions
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  41  *    notice, this list of conditions and the following disclaimer.
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  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 <linux/dma-mapping.h>
  67 #include <net/net_namespace.h>
  68 #include <linux/netdevice.h>
  69 #include <net/cfg80211.h>
  70 #include <net/mac80211.h>
  71 #include <net/netlink.h>
  72
  73 #include "iwl-dev.h"
  74 #include "iwl-core.h"
  75 #include "iwl-debug.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         [IWL_TM_ATTR_UCODE_OWNER] = { .type = NLA_U8, },
 109 };
 110
 111 /*
 112  * See the struct iwl_rx_packet in iwl-commands.h for the format of the
 113  * received events from the device
 114  */
 115 static inline int get_event_length(struct iwl_rx_mem_buffer *rxb)
 116 {
 117         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 118         if (pkt)
 119                 return le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
 120         else
 121                 return 0;
 122 }
 123
 124
 125 /*
 126  * This function multicasts the spontaneous messages from the device to the
 127  * user space. It is invoked whenever there is a received messages
 128  * from the device. This function is called within the ISR of the rx handlers
 129  * in iwlagn driver.
 130  *
 131  * The parsing of the message content is left to the user space application,
 132  * The message content is treated as unattacked raw data and is encapsulated
 133  * with IWL_TM_ATTR_UCODE_RX_PKT multicasting to the user space.
 134  *
 135  * @priv: the instance of iwlwifi device
 136  * @rxb: pointer to rx data content received by the ISR
 137  *
 138  * See the message policies and TLVs in iwl_testmode_gnl_msg_policy[].
 139  * For the messages multicasting to the user application, the mandatory
 140  * TLV fields are :
 141  *      IWL_TM_ATTR_COMMAND must be IWL_TM_CMD_DEV2APP_UCODE_RX_PKT
 142  *      IWL_TM_ATTR_UCODE_RX_PKT for carrying the message content
 143  */
 144
 145 static void iwl_testmode_ucode_rx_pkt(struct iwl_priv *priv,
 146                                 struct iwl_rx_mem_buffer *rxb)
 147 {
 148         struct ieee80211_hw *hw = priv->hw;
 149         struct sk_buff *skb;
 150         void *data;
 151         int length;
 152
 153         data = (void *)rxb_addr(rxb);
 154         length = get_event_length(rxb);
 155
 156         if (!data || length == 0)
 157                 return;
 158
 159         skb = cfg80211_testmode_alloc_event_skb(hw->wiphy, 20 + length,
 160                                                                 GFP_ATOMIC);
 161         if (skb == NULL) {
 162                 IWL_DEBUG_INFO(priv,
 163                          "Run out of memory for messages to user space ?\n");
 164                 return;
 165         }
 166         NLA_PUT_U32(skb, IWL_TM_ATTR_COMMAND, IWL_TM_CMD_DEV2APP_UCODE_RX_PKT);
 167         NLA_PUT(skb, IWL_TM_ATTR_UCODE_RX_PKT, length, data);
 168         cfg80211_testmode_event(skb, GFP_ATOMIC);
 169         return;
 170
 171 nla_put_failure:
 172         kfree_skb(skb);
 173         IWL_DEBUG_INFO(priv, "Ouch, overran buffer, check allocation!\n");
 174 }
 175
 176 void iwl_testmode_init(struct iwl_priv *priv)
 177 {
 178         priv->pre_rx_handler = iwl_testmode_ucode_rx_pkt;
 179         priv->testmode_trace.trace_enabled = false;
 180 }
 181
 182 static void iwl_trace_cleanup(struct iwl_priv *priv)
 183 {
 184         if (priv->testmode_trace.trace_enabled) {
 185                 if (priv->testmode_trace.cpu_addr &&
 186                     priv->testmode_trace.dma_addr)
 187                         dma_free_coherent(bus(priv)->dev,
 188                                         priv->testmode_trace.total_size,
 189                                         priv->testmode_trace.cpu_addr,
 190                                         priv->testmode_trace.dma_addr);
 191                 priv->testmode_trace.trace_enabled = false;
 192                 priv->testmode_trace.cpu_addr = NULL;
 193                 priv->testmode_trace.trace_addr = NULL;
 194                 priv->testmode_trace.dma_addr = 0;
 195                 priv->testmode_trace.buff_size = 0;
 196                 priv->testmode_trace.total_size = 0;
 197         }
 198 }
 199
 200
 201 void iwl_testmode_cleanup(struct iwl_priv *priv)
 202 {
 203         iwl_trace_cleanup(priv);
 204 }
 205
 206 /*
 207  * This function handles the user application commands to the ucode.
 208  *
 209  * It retrieves the mandatory fields IWL_TM_ATTR_UCODE_CMD_ID and
 210  * IWL_TM_ATTR_UCODE_CMD_DATA and calls to the handler to send the
 211  * host command to the ucode.
 212  *
 213  * If any mandatory field is missing, -ENOMSG is replied to the user space
 214  * application; otherwise, the actual execution result of the host command to
 215  * ucode is replied.
 216  *
 217  * @hw: ieee80211_hw object that represents the device
 218  * @tb: gnl message fields from the user space
 219  */
 220 static int iwl_testmode_ucode(struct ieee80211_hw *hw, struct nlattr **tb)
 221 {
 222         struct iwl_priv *priv = hw->priv;
 223         struct iwl_host_cmd cmd;
 224
 225         memset(&cmd, 0, sizeof(struct iwl_host_cmd));
 226
 227         if (!tb[IWL_TM_ATTR_UCODE_CMD_ID] ||
 228             !tb[IWL_TM_ATTR_UCODE_CMD_DATA]) {
 229                 IWL_DEBUG_INFO(priv,
 230                         "Error finding ucode command mandatory fields\n");
 231                 return -ENOMSG;
 232         }
 233
 234         cmd.flags = CMD_ON_DEMAND;
 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_trans_send_cmd(trans(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_DIRECT_REG_READ32:
 280                 val32 = iwl_read32(bus(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_DIRECT_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(bus(priv), ofs, val32);
 303                 }
 304                 break;
 305         case IWL_TM_CMD_APP2DEV_DIRECT_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(bus(priv), ofs, val8);
 313                 }
 314                 break;
 315         case IWL_TM_CMD_APP2DEV_INDIRECT_REG_READ32:
 316                 val32 = iwl_read_prph(bus(priv), ofs);
 317                 IWL_INFO(priv, "32bit value to read 0x%x\n", val32);
 318
 319                 skb = cfg80211_testmode_alloc_reply_skb(hw->wiphy, 20);
 320                 if (!skb) {
 321                         IWL_DEBUG_INFO(priv, "Error allocating memory\n");
 322                         return -ENOMEM;
 323                 }
 324                 NLA_PUT_U32(skb, IWL_TM_ATTR_REG_VALUE32, val32);
 325                 status = cfg80211_testmode_reply(skb);
 326                 if (status < 0)
 327                         IWL_DEBUG_INFO(priv,
 328                                         "Error sending msg : %d\n", status);
 329                 break;
 330         case IWL_TM_CMD_APP2DEV_INDIRECT_REG_WRITE32:
 331                 if (!tb[IWL_TM_ATTR_REG_VALUE32]) {
 332                         IWL_DEBUG_INFO(priv,
 333                                         "Error finding value to write\n");
 334                         return -ENOMSG;
 335                 } else {
 336                         val32 = nla_get_u32(tb[IWL_TM_ATTR_REG_VALUE32]);
 337                         IWL_INFO(priv, "32bit value to write 0x%x\n", val32);
 338                         iwl_write_prph(bus(priv), ofs, val32);
 339                 }
 340                 break;
 341         default:
 342                 IWL_DEBUG_INFO(priv, "Unknown testmode register command ID\n");
 343                 return -ENOSYS;
 344         }
 345
 346         return status;
 347
 348 nla_put_failure:
 349         kfree_skb(skb);
 350         return -EMSGSIZE;
 351 }
 352
 353
 354 static int iwl_testmode_cfg_init_calib(struct iwl_priv *priv)
 355 {
 356         struct iwl_notification_wait calib_wait;
 357         int ret;
 358
 359         iwlagn_init_notification_wait(priv, &calib_wait,
 360                                       CALIBRATION_COMPLETE_NOTIFICATION,
 361                                       NULL, NULL);
 362         ret = iwlagn_init_alive_start(priv);
 363         if (ret) {
 364                 IWL_DEBUG_INFO(priv,
 365                         "Error configuring init calibration: %d\n", ret);
 366                 goto cfg_init_calib_error;
 367         }
 368
 369         ret = iwlagn_wait_notification(priv, &calib_wait, 2 * HZ);
 370         if (ret)
 371                 IWL_DEBUG_INFO(priv, "Error detecting"
 372                         " CALIBRATION_COMPLETE_NOTIFICATION: %d\n", ret);
 373         return ret;
 374
 375 cfg_init_calib_error:
 376         iwlagn_remove_notification(priv, &calib_wait);
 377         return ret;
 378 }
 379
 380 /*
 381  * This function handles the user application commands for driver.
 382  *
 383  * It retrieves command ID carried with IWL_TM_ATTR_COMMAND and calls to the
 384  * handlers respectively.
 385  *
 386  * If it's an unknown commdn ID, -ENOSYS is replied; otherwise, the returned
 387  * value of the actual command execution is replied to the user application.
 388  *
 389  * If there's any message responding to the user space, IWL_TM_ATTR_SYNC_RSP
 390  * is used for carry the message while IWL_TM_ATTR_COMMAND must set to
 391  * IWL_TM_CMD_DEV2APP_SYNC_RSP.
 392  *
 393  * @hw: ieee80211_hw object that represents the device
 394  * @tb: gnl message fields from the user space
 395  */
 396 static int iwl_testmode_driver(struct ieee80211_hw *hw, struct nlattr **tb)
 397 {
 398         struct iwl_priv *priv = hw->priv;
 399         struct sk_buff *skb;
 400         unsigned char *rsp_data_ptr = NULL;
 401         int status = 0, rsp_data_len = 0;
 402
 403         switch (nla_get_u32(tb[IWL_TM_ATTR_COMMAND])) {
 404         case IWL_TM_CMD_APP2DEV_GET_DEVICENAME:
 405                 rsp_data_ptr = (unsigned char *)priv->cfg->name;
 406                 rsp_data_len = strlen(priv->cfg->name);
 407                 skb = cfg80211_testmode_alloc_reply_skb(hw->wiphy,
 408                                                         rsp_data_len + 20);
 409                 if (!skb) {
 410                         IWL_DEBUG_INFO(priv,
 411                                        "Error allocating memory\n");
 412                         return -ENOMEM;
 413                 }
 414                 NLA_PUT_U32(skb, IWL_TM_ATTR_COMMAND,
 415                             IWL_TM_CMD_DEV2APP_SYNC_RSP);
 416                 NLA_PUT(skb, IWL_TM_ATTR_SYNC_RSP,
 417                         rsp_data_len, rsp_data_ptr);
 418                 status = cfg80211_testmode_reply(skb);
 419                 if (status < 0)
 420                         IWL_DEBUG_INFO(priv, "Error sending msg : %d\n",
 421                                        status);
 422                 break;
 423
 424         case IWL_TM_CMD_APP2DEV_LOAD_INIT_FW:
 425                 status = iwlagn_load_ucode_wait_alive(priv, IWL_UCODE_INIT);
 426                 if (status)
 427                         IWL_DEBUG_INFO(priv,
 428                                 "Error loading init ucode: %d\n", status);
 429                 break;
 430
 431         case IWL_TM_CMD_APP2DEV_CFG_INIT_CALIB:
 432                 iwl_testmode_cfg_init_calib(priv);
 433                 iwl_trans_stop_device(trans(priv));
 434                 break;
 435
 436         case IWL_TM_CMD_APP2DEV_LOAD_RUNTIME_FW:
 437                 status = iwlagn_load_ucode_wait_alive(priv, IWL_UCODE_REGULAR);
 438                 if (status) {
 439                         IWL_DEBUG_INFO(priv,
 440                                 "Error loading runtime ucode: %d\n", status);
 441                         break;
 442                 }
 443                 status = iwl_alive_start(priv);
 444                 if (status)
 445                         IWL_DEBUG_INFO(priv,
 446                                 "Error starting the device: %d\n", status);
 447                 break;
 448
 449         case IWL_TM_CMD_APP2DEV_GET_EEPROM:
 450                 if (priv->eeprom) {
 451                         skb = cfg80211_testmode_alloc_reply_skb(hw->wiphy,
 452                                 priv->cfg->base_params->eeprom_size + 20);
 453                         if (!skb) {
 454                                 IWL_DEBUG_INFO(priv,
 455                                        "Error allocating memory\n");
 456                                 return -ENOMEM;
 457                         }
 458                         NLA_PUT_U32(skb, IWL_TM_ATTR_COMMAND,
 459                                 IWL_TM_CMD_DEV2APP_EEPROM_RSP);
 460                         NLA_PUT(skb, IWL_TM_ATTR_EEPROM,
 461                                 priv->cfg->base_params->eeprom_size,
 462                                 priv->eeprom);
 463                         status = cfg80211_testmode_reply(skb);
 464                         if (status < 0)
 465                                 IWL_DEBUG_INFO(priv,
 466                                                "Error sending msg : %d\n",
 467                                                status);
 468                 } else
 469                         return -EFAULT;
 470                 break;
 471
 472         case IWL_TM_CMD_APP2DEV_FIXRATE_REQ:
 473                 if (!tb[IWL_TM_ATTR_FIXRATE]) {
 474                         IWL_DEBUG_INFO(priv,
 475                                        "Error finding fixrate setting\n");
 476                         return -ENOMSG;
 477                 }
 478                 priv->tm_fixed_rate = nla_get_u32(tb[IWL_TM_ATTR_FIXRATE]);
 479                 break;
 480
 481         default:
 482                 IWL_DEBUG_INFO(priv, "Unknown testmode driver command ID\n");
 483                 return -ENOSYS;
 484         }
 485         return status;
 486
 487 nla_put_failure:
 488         kfree_skb(skb);
 489         return -EMSGSIZE;
 490 }
 491
 492
 493 /*
 494  * This function handles the user application commands for uCode trace
 495  *
 496  * It retrieves command ID carried with IWL_TM_ATTR_COMMAND and calls to the
 497  * handlers respectively.
 498  *
 499  * If it's an unknown commdn ID, -ENOSYS is replied; otherwise, the returned
 500  * value of the actual command execution is replied to the user application.
 501  *
 502  * @hw: ieee80211_hw object that represents the device
 503  * @tb: gnl message fields from the user space
 504  */
 505 static int iwl_testmode_trace(struct ieee80211_hw *hw, struct nlattr **tb)
 506 {
 507         struct iwl_priv *priv = hw->priv;
 508         struct sk_buff *skb;
 509         int status = 0;
 510         struct device *dev = bus(priv)->dev;
 511
 512         switch (nla_get_u32(tb[IWL_TM_ATTR_COMMAND])) {
 513         case IWL_TM_CMD_APP2DEV_BEGIN_TRACE:
 514                 if (priv->testmode_trace.trace_enabled)
 515                         return -EBUSY;
 516
 517                 if (!tb[IWL_TM_ATTR_TRACE_SIZE])
 518                         priv->testmode_trace.buff_size = TRACE_BUFF_SIZE_DEF;
 519                 else
 520                         priv->testmode_trace.buff_size =
 521                                 nla_get_u32(tb[IWL_TM_ATTR_TRACE_SIZE]);
 522                 if (!priv->testmode_trace.buff_size)
 523                         return -EINVAL;
 524                 if (priv->testmode_trace.buff_size < TRACE_BUFF_SIZE_MIN ||
 525                     priv->testmode_trace.buff_size > TRACE_BUFF_SIZE_MAX)
 526                         return -EINVAL;
 527
 528                 priv->testmode_trace.total_size =
 529                         priv->testmode_trace.buff_size + TRACE_BUFF_PADD;
 530                 priv->testmode_trace.cpu_addr =
 531                         dma_alloc_coherent(dev,
 532                                            priv->testmode_trace.total_size,
 533                                            &priv->testmode_trace.dma_addr,
 534                                            GFP_KERNEL);
 535                 if (!priv->testmode_trace.cpu_addr)
 536                         return -ENOMEM;
 537                 priv->testmode_trace.trace_enabled = true;
 538                 priv->testmode_trace.trace_addr = (u8 *)PTR_ALIGN(
 539                         priv->testmode_trace.cpu_addr, 0x100);
 540                 memset(priv->testmode_trace.trace_addr, 0x03B,
 541                         priv->testmode_trace.buff_size);
 542                 skb = cfg80211_testmode_alloc_reply_skb(hw->wiphy,
 543                         sizeof(priv->testmode_trace.dma_addr) + 20);
 544                 if (!skb) {
 545                         IWL_DEBUG_INFO(priv,
 546                                 "Error allocating memory\n");
 547                         iwl_trace_cleanup(priv);
 548                         return -ENOMEM;
 549                 }
 550                 NLA_PUT(skb, IWL_TM_ATTR_TRACE_ADDR,
 551                         sizeof(priv->testmode_trace.dma_addr),
 552                         (u64 *)&priv->testmode_trace.dma_addr);
 553                 status = cfg80211_testmode_reply(skb);
 554                 if (status < 0) {
 555                         IWL_DEBUG_INFO(priv,
 556                                        "Error sending msg : %d\n",
 557                                        status);
 558                 }
 559                 priv->testmode_trace.num_chunks =
 560                         DIV_ROUND_UP(priv->testmode_trace.buff_size,
 561                                      TRACE_CHUNK_SIZE);
 562                 break;
 563
 564         case IWL_TM_CMD_APP2DEV_END_TRACE:
 565                 iwl_trace_cleanup(priv);
 566                 break;
 567         default:
 568                 IWL_DEBUG_INFO(priv, "Unknown testmode mem command ID\n");
 569                 return -ENOSYS;
 570         }
 571         return status;
 572
 573 nla_put_failure:
 574         kfree_skb(skb);
 575         if (nla_get_u32(tb[IWL_TM_ATTR_COMMAND]) ==
 576             IWL_TM_CMD_APP2DEV_BEGIN_TRACE)
 577                 iwl_trace_cleanup(priv);
 578         return -EMSGSIZE;
 579 }
 580
 581 static int iwl_testmode_trace_dump(struct ieee80211_hw *hw, struct nlattr **tb,
 582                                    struct sk_buff *skb,
 583                                    struct netlink_callback *cb)
 584 {
 585         struct iwl_priv *priv = hw->priv;
 586         int idx, length;
 587
 588         if (priv->testmode_trace.trace_enabled &&
 589             priv->testmode_trace.trace_addr) {
 590                 idx = cb->args[4];
 591                 if (idx >= priv->testmode_trace.num_chunks)
 592                         return -ENOENT;
 593                 length = TRACE_CHUNK_SIZE;
 594                 if (((idx + 1) == priv->testmode_trace.num_chunks) &&
 595                     (priv->testmode_trace.buff_size % TRACE_CHUNK_SIZE))
 596                         length = priv->testmode_trace.buff_size %
 597                                 TRACE_CHUNK_SIZE;
 598
 599                 NLA_PUT(skb, IWL_TM_ATTR_TRACE_DUMP, length,
 600                         priv->testmode_trace.trace_addr +
 601                         (TRACE_CHUNK_SIZE * idx));
 602                 idx++;
 603                 cb->args[4] = idx;
 604                 return 0;
 605         } else
 606                 return -EFAULT;
 607
 608  nla_put_failure:
 609         return -ENOBUFS;
 610 }
 611
 612 /*
 613  * This function handles the user application switch ucode ownership.
 614  *
 615  * It retrieves the mandatory fields IWL_TM_ATTR_UCODE_OWNER and
 616  * decide who the current owner of the uCode
 617  *
 618  * If the current owner is OWNERSHIP_TM, then the only host command
 619  * can deliver to uCode is from testmode, all the other host commands
 620  * will dropped.
 621  *
 622  * default driver is the owner of uCode in normal operational mode
 623  *
 624  * @hw: ieee80211_hw object that represents the device
 625  * @tb: gnl message fields from the user space
 626  */
 627 static int iwl_testmode_ownership(struct ieee80211_hw *hw, struct nlattr **tb)
 628 {
 629         struct iwl_priv *priv = hw->priv;
 630         u8 owner;
 631
 632         if (!tb[IWL_TM_ATTR_UCODE_OWNER]) {
 633                 IWL_DEBUG_INFO(priv, "Error finding ucode owner\n");
 634                 return -ENOMSG;
 635         }
 636
 637         owner = nla_get_u8(tb[IWL_TM_ATTR_UCODE_OWNER]);
 638         if ((owner == IWL_OWNERSHIP_DRIVER) || (owner == IWL_OWNERSHIP_TM))
 639                 priv->shrd->ucode_owner = owner;
 640         else {
 641                 IWL_DEBUG_INFO(priv, "Invalid owner\n");
 642                 return -EINVAL;
 643         }
 644         return 0;
 645 }
 646
 647
 648 /* The testmode gnl message handler that takes the gnl message from the
 649  * user space and parses it per the policy iwl_testmode_gnl_msg_policy, then
 650  * invoke the corresponding handlers.
 651  *
 652  * This function is invoked when there is user space application sending
 653  * gnl message through the testmode tunnel NL80211_CMD_TESTMODE regulated
 654  * by nl80211.
 655  *
 656  * It retrieves the mandatory field, IWL_TM_ATTR_COMMAND, before
 657  * dispatching it to the corresponding handler.
 658  *
 659  * If IWL_TM_ATTR_COMMAND is missing, -ENOMSG is replied to user application;
 660  * -ENOSYS is replied to the user application if the command is unknown;
 661  * Otherwise, the command is dispatched to the respective handler.
 662  *
 663  * @hw: ieee80211_hw object that represents the device
 664  * @data: pointer to user space message
 665  * @len: length in byte of @data
 666  */
 667 int iwlagn_mac_testmode_cmd(struct ieee80211_hw *hw, void *data, int len)
 668 {
 669         struct nlattr *tb[IWL_TM_ATTR_MAX];
 670         struct iwl_priv *priv = hw->priv;
 671         int result;
 672
 673         result = nla_parse(tb, IWL_TM_ATTR_MAX - 1, data, len,
 674                         iwl_testmode_gnl_msg_policy);
 675         if (result != 0) {
 676                 IWL_DEBUG_INFO(priv,
 677                                "Error parsing the gnl message : %d\n", result);
 678                 return result;
 679         }
 680
 681         /* IWL_TM_ATTR_COMMAND is absolutely mandatory */
 682         if (!tb[IWL_TM_ATTR_COMMAND]) {
 683                 IWL_DEBUG_INFO(priv, "Error finding testmode command type\n");
 684                 return -ENOMSG;
 685         }
 686         /* in case multiple accesses to the device happens */
 687         mutex_lock(&priv->shrd->mutex);
 688
 689         switch (nla_get_u32(tb[IWL_TM_ATTR_COMMAND])) {
 690         case IWL_TM_CMD_APP2DEV_UCODE:
 691                 IWL_DEBUG_INFO(priv, "testmode cmd to uCode\n");
 692                 result = iwl_testmode_ucode(hw, tb);
 693                 break;
 694         case IWL_TM_CMD_APP2DEV_DIRECT_REG_READ32:
 695         case IWL_TM_CMD_APP2DEV_DIRECT_REG_WRITE32:
 696         case IWL_TM_CMD_APP2DEV_DIRECT_REG_WRITE8:
 697         case IWL_TM_CMD_APP2DEV_INDIRECT_REG_READ32:
 698         case IWL_TM_CMD_APP2DEV_INDIRECT_REG_WRITE32:
 699                 IWL_DEBUG_INFO(priv, "testmode cmd to register\n");
 700                 result = iwl_testmode_reg(hw, tb);
 701                 break;
 702         case IWL_TM_CMD_APP2DEV_GET_DEVICENAME:
 703         case IWL_TM_CMD_APP2DEV_LOAD_INIT_FW:
 704         case IWL_TM_CMD_APP2DEV_CFG_INIT_CALIB:
 705         case IWL_TM_CMD_APP2DEV_LOAD_RUNTIME_FW:
 706         case IWL_TM_CMD_APP2DEV_GET_EEPROM:
 707         case IWL_TM_CMD_APP2DEV_FIXRATE_REQ:
 708                 IWL_DEBUG_INFO(priv, "testmode cmd to driver\n");
 709                 result = iwl_testmode_driver(hw, tb);
 710                 break;
 711
 712         case IWL_TM_CMD_APP2DEV_BEGIN_TRACE:
 713         case IWL_TM_CMD_APP2DEV_END_TRACE:
 714         case IWL_TM_CMD_APP2DEV_READ_TRACE:
 715                 IWL_DEBUG_INFO(priv, "testmode uCode trace cmd to driver\n");
 716                 result = iwl_testmode_trace(hw, tb);
 717                 break;
 718
 719         case IWL_TM_CMD_APP2DEV_OWNERSHIP:
 720                 IWL_DEBUG_INFO(priv, "testmode change uCode ownership\n");
 721                 result = iwl_testmode_ownership(hw, tb);
 722                 break;
 723
 724         default:
 725                 IWL_DEBUG_INFO(priv, "Unknown testmode command\n");
 726                 result = -ENOSYS;
 727                 break;
 728         }
 729
 730         mutex_unlock(&priv->shrd->mutex);
 731         return result;
 732 }
 733
 734 int iwlagn_mac_testmode_dump(struct ieee80211_hw *hw, struct sk_buff *skb,
 735                       struct netlink_callback *cb,
 736                       void *data, int len)
 737 {
 738         struct nlattr *tb[IWL_TM_ATTR_MAX];
 739         struct iwl_priv *priv = hw->priv;
 740         int result;
 741         u32 cmd;
 742
 743         if (cb->args[3]) {
 744                 /* offset by 1 since commands start at 0 */
 745                 cmd = cb->args[3] - 1;
 746         } else {
 747                 result = nla_parse(tb, IWL_TM_ATTR_MAX - 1, data, len,
 748                                 iwl_testmode_gnl_msg_policy);
 749                 if (result) {
 750                         IWL_DEBUG_INFO(priv,
 751                                "Error parsing the gnl message : %d\n", result);
 752                         return result;
 753                 }
 754
 755                 /* IWL_TM_ATTR_COMMAND is absolutely mandatory */
 756                 if (!tb[IWL_TM_ATTR_COMMAND]) {
 757                         IWL_DEBUG_INFO(priv,
 758                                 "Error finding testmode command type\n");
 759                         return -ENOMSG;
 760                 }
 761                 cmd = nla_get_u32(tb[IWL_TM_ATTR_COMMAND]);
 762                 cb->args[3] = cmd + 1;
 763         }
 764
 765         /* in case multiple accesses to the device happens */
 766         mutex_lock(&priv->shrd->mutex);
 767         switch (cmd) {
 768         case IWL_TM_CMD_APP2DEV_READ_TRACE:
 769                 IWL_DEBUG_INFO(priv, "uCode trace cmd to driver\n");
 770                 result = iwl_testmode_trace_dump(hw, tb, skb, cb);
 771                 break;
 772         default:
 773                 result = -EINVAL;
 774                 break;
 775         }
 776
 777         mutex_unlock(&priv->shrd->mutex);
 778         return result;
 779 }