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

   1 /******************************************************************************
   2  *
   3  * This file is provided under a dual BSD/GPLv2 license.  When using or
   4  * redistributing this file, you may do so under either license.
   5  *
   6  * GPL LICENSE SUMMARY
   7  *
   8  * Copyright(c) 2010 - 2011 Intel Corporation. All rights reserved.
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of version 2 of the GNU General Public License as
  12  * published by the Free Software Foundation.
  13  *
  14  * This program is distributed in the hope that it will be useful, but
  15  * WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * General Public License for more details.
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  20  * along with this program; if not, write to the Free Software
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  22  * USA
  23  *
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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.
  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 <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_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_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_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         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, IWL_UCODE_INIT);
 400                 if (status)
 401                         IWL_DEBUG_INFO(priv,
 402                                 "Error loading init ucode: %d\n", status);
 403                 break;
 404
 405         case IWL_TM_CMD_APP2DEV_CFG_INIT_CALIB:
 406                 iwl_testmode_cfg_init_calib(priv);
 407                 iwl_trans_stop_device(trans(priv));
 408                 break;
 409
 410         case IWL_TM_CMD_APP2DEV_LOAD_RUNTIME_FW:
 411                 status = iwlagn_load_ucode_wait_alive(priv, IWL_UCODE_REGULAR);
 412                 if (status) {
 413                         IWL_DEBUG_INFO(priv,
 414                                 "Error loading runtime ucode: %d\n", status);
 415                         break;
 416                 }
 417                 status = iwl_alive_start(priv);
 418                 if (status)
 419                         IWL_DEBUG_INFO(priv,
 420                                 "Error starting the device: %d\n", status);
 421                 break;
 422
 423         case IWL_TM_CMD_APP2DEV_GET_EEPROM:
 424                 if (priv->eeprom) {
 425                         skb = cfg80211_testmode_alloc_reply_skb(hw->wiphy,
 426                                 priv->cfg->base_params->eeprom_size + 20);
 427                         if (!skb) {
 428                                 IWL_DEBUG_INFO(priv,
 429                                        "Error allocating memory\n");
 430                                 return -ENOMEM;
 431                         }
 432                         NLA_PUT_U32(skb, IWL_TM_ATTR_COMMAND,
 433                                 IWL_TM_CMD_DEV2APP_EEPROM_RSP);
 434                         NLA_PUT(skb, IWL_TM_ATTR_EEPROM,
 435                                 priv->cfg->base_params->eeprom_size,
 436                                 priv->eeprom);
 437                         status = cfg80211_testmode_reply(skb);
 438                         if (status < 0)
 439                                 IWL_DEBUG_INFO(priv,
 440                                                "Error sending msg : %d\n",
 441                                                status);
 442                 } else
 443                         return -EFAULT;
 444                 break;
 445
 446         case IWL_TM_CMD_APP2DEV_FIXRATE_REQ:
 447                 if (!tb[IWL_TM_ATTR_FIXRATE]) {
 448                         IWL_DEBUG_INFO(priv,
 449                                        "Error finding fixrate setting\n");
 450                         return -ENOMSG;
 451                 }
 452                 priv->tm_fixed_rate = nla_get_u32(tb[IWL_TM_ATTR_FIXRATE]);
 453                 break;
 454
 455         default:
 456                 IWL_DEBUG_INFO(priv, "Unknown testmode driver command ID\n");
 457                 return -ENOSYS;
 458         }
 459         return status;
 460
 461 nla_put_failure:
 462         kfree_skb(skb);
 463         return -EMSGSIZE;
 464 }
 465
 466
 467 /*
 468  * This function handles the user application commands for uCode trace
 469  *
 470  * It retrieves command ID carried with IWL_TM_ATTR_COMMAND and calls to the
 471  * handlers respectively.
 472  *
 473  * If it's an unknown commdn ID, -ENOSYS is replied; otherwise, the returned
 474  * value of the actual command execution is replied to the user application.
 475  *
 476  * @hw: ieee80211_hw object that represents the device
 477  * @tb: gnl message fields from the user space
 478  */
 479 static int iwl_testmode_trace(struct ieee80211_hw *hw, struct nlattr **tb)
 480 {
 481         struct iwl_priv *priv = hw->priv;
 482         struct sk_buff *skb;
 483         int status = 0;
 484         struct device *dev = bus(priv)->dev;
 485
 486         switch (nla_get_u32(tb[IWL_TM_ATTR_COMMAND])) {
 487         case IWL_TM_CMD_APP2DEV_BEGIN_TRACE:
 488                 if (priv->testmode_trace.trace_enabled)
 489                         return -EBUSY;
 490
 491                 if (!tb[IWL_TM_ATTR_TRACE_SIZE])
 492                         priv->testmode_trace.buff_size = TRACE_BUFF_SIZE_DEF;
 493                 else
 494                         priv->testmode_trace.buff_size =
 495                                 nla_get_u32(tb[IWL_TM_ATTR_TRACE_SIZE]);
 496                 if (!priv->testmode_trace.buff_size)
 497                         return -EINVAL;
 498                 if (priv->testmode_trace.buff_size < TRACE_BUFF_SIZE_MIN ||
 499                     priv->testmode_trace.buff_size > TRACE_BUFF_SIZE_MAX)
 500                         return -EINVAL;
 501
 502                 priv->testmode_trace.total_size =
 503                         priv->testmode_trace.buff_size + TRACE_BUFF_PADD;
 504                 priv->testmode_trace.cpu_addr =
 505                         dma_alloc_coherent(dev,
 506                                            priv->testmode_trace.total_size,
 507                                            &priv->testmode_trace.dma_addr,
 508                                            GFP_KERNEL);
 509                 if (!priv->testmode_trace.cpu_addr)
 510                         return -ENOMEM;
 511                 priv->testmode_trace.trace_enabled = true;
 512                 priv->testmode_trace.trace_addr = (u8 *)PTR_ALIGN(
 513                         priv->testmode_trace.cpu_addr, 0x100);
 514                 memset(priv->testmode_trace.trace_addr, 0x03B,
 515                         priv->testmode_trace.buff_size);
 516                 skb = cfg80211_testmode_alloc_reply_skb(hw->wiphy,
 517                         sizeof(priv->testmode_trace.dma_addr) + 20);
 518                 if (!skb) {
 519                         IWL_DEBUG_INFO(priv,
 520                                 "Error allocating memory\n");
 521                         iwl_trace_cleanup(priv);
 522                         return -ENOMEM;
 523                 }
 524                 NLA_PUT(skb, IWL_TM_ATTR_TRACE_ADDR,
 525                         sizeof(priv->testmode_trace.dma_addr),
 526                         (u64 *)&priv->testmode_trace.dma_addr);
 527                 status = cfg80211_testmode_reply(skb);
 528                 if (status < 0) {
 529                         IWL_DEBUG_INFO(priv,
 530                                        "Error sending msg : %d\n",
 531                                        status);
 532                 }
 533                 priv->testmode_trace.num_chunks =
 534                         DIV_ROUND_UP(priv->testmode_trace.buff_size,
 535                                      TRACE_CHUNK_SIZE);
 536                 break;
 537
 538         case IWL_TM_CMD_APP2DEV_END_TRACE:
 539                 iwl_trace_cleanup(priv);
 540                 break;
 541         default:
 542                 IWL_DEBUG_INFO(priv, "Unknown testmode mem command ID\n");
 543                 return -ENOSYS;
 544         }
 545         return status;
 546
 547 nla_put_failure:
 548         kfree_skb(skb);
 549         if (nla_get_u32(tb[IWL_TM_ATTR_COMMAND]) ==
 550             IWL_TM_CMD_APP2DEV_BEGIN_TRACE)
 551                 iwl_trace_cleanup(priv);
 552         return -EMSGSIZE;
 553 }
 554
 555 static int iwl_testmode_trace_dump(struct ieee80211_hw *hw, struct nlattr **tb,
 556                                    struct sk_buff *skb,
 557                                    struct netlink_callback *cb)
 558 {
 559         struct iwl_priv *priv = hw->priv;
 560         int idx, length;
 561
 562         if (priv->testmode_trace.trace_enabled &&
 563             priv->testmode_trace.trace_addr) {
 564                 idx = cb->args[4];
 565                 if (idx >= priv->testmode_trace.num_chunks)
 566                         return -ENOENT;
 567                 length = TRACE_CHUNK_SIZE;
 568                 if (((idx + 1) == priv->testmode_trace.num_chunks) &&
 569                     (priv->testmode_trace.buff_size % TRACE_CHUNK_SIZE))
 570                         length = priv->testmode_trace.buff_size %
 571                                 TRACE_CHUNK_SIZE;
 572
 573                 NLA_PUT(skb, IWL_TM_ATTR_TRACE_DUMP, length,
 574                         priv->testmode_trace.trace_addr +
 575                         (TRACE_CHUNK_SIZE * idx));
 576                 idx++;
 577                 cb->args[4] = idx;
 578                 return 0;
 579         } else
 580                 return -EFAULT;
 581
 582  nla_put_failure:
 583         return -ENOBUFS;
 584 }
 585
 586 /*
 587  * This function handles the user application switch ucode ownership.
 588  *
 589  * It retrieves the mandatory fields IWL_TM_ATTR_UCODE_OWNER and
 590  * decide who the current owner of the uCode
 591  *
 592  * If the current owner is OWNERSHIP_TM, then the only host command
 593  * can deliver to uCode is from testmode, all the other host commands
 594  * will dropped.
 595  *
 596  * default driver is the owner of uCode in normal operational mode
 597  *
 598  * @hw: ieee80211_hw object that represents the device
 599  * @tb: gnl message fields from the user space
 600  */
 601 static int iwl_testmode_ownership(struct ieee80211_hw *hw, struct nlattr **tb)
 602 {
 603         struct iwl_priv *priv = hw->priv;
 604         u8 owner;
 605
 606         if (!tb[IWL_TM_ATTR_UCODE_OWNER]) {
 607                 IWL_DEBUG_INFO(priv, "Error finding ucode owner\n");
 608                 return -ENOMSG;
 609         }
 610
 611         owner = nla_get_u8(tb[IWL_TM_ATTR_UCODE_OWNER]);
 612         if ((owner == IWL_OWNERSHIP_DRIVER) || (owner == IWL_OWNERSHIP_TM))
 613                 priv->shrd->ucode_owner = owner;
 614         else {
 615                 IWL_DEBUG_INFO(priv, "Invalid owner\n");
 616                 return -EINVAL;
 617         }
 618         return 0;
 619 }
 620
 621
 622 /* The testmode gnl message handler that takes the gnl message from the
 623  * user space and parses it per the policy iwl_testmode_gnl_msg_policy, then
 624  * invoke the corresponding handlers.
 625  *
 626  * This function is invoked when there is user space application sending
 627  * gnl message through the testmode tunnel NL80211_CMD_TESTMODE regulated
 628  * by nl80211.
 629  *
 630  * It retrieves the mandatory field, IWL_TM_ATTR_COMMAND, before
 631  * dispatching it to the corresponding handler.
 632  *
 633  * If IWL_TM_ATTR_COMMAND is missing, -ENOMSG is replied to user application;
 634  * -ENOSYS is replied to the user application if the command is unknown;
 635  * Otherwise, the command is dispatched to the respective handler.
 636  *
 637  * @hw: ieee80211_hw object that represents the device
 638  * @data: pointer to user space message
 639  * @len: length in byte of @data
 640  */
 641 int iwlagn_mac_testmode_cmd(struct ieee80211_hw *hw, void *data, int len)
 642 {
 643         struct nlattr *tb[IWL_TM_ATTR_MAX];
 644         struct iwl_priv *priv = hw->priv;
 645         int result;
 646
 647         result = nla_parse(tb, IWL_TM_ATTR_MAX - 1, data, len,
 648                         iwl_testmode_gnl_msg_policy);
 649         if (result != 0) {
 650                 IWL_DEBUG_INFO(priv,
 651                                "Error parsing the gnl message : %d\n", result);
 652                 return result;
 653         }
 654
 655         /* IWL_TM_ATTR_COMMAND is absolutely mandatory */
 656         if (!tb[IWL_TM_ATTR_COMMAND]) {
 657                 IWL_DEBUG_INFO(priv, "Error finding testmode command type\n");
 658                 return -ENOMSG;
 659         }
 660         /* in case multiple accesses to the device happens */
 661         mutex_lock(&priv->shrd->mutex);
 662
 663         switch (nla_get_u32(tb[IWL_TM_ATTR_COMMAND])) {
 664         case IWL_TM_CMD_APP2DEV_UCODE:
 665                 IWL_DEBUG_INFO(priv, "testmode cmd to uCode\n");
 666                 result = iwl_testmode_ucode(hw, tb);
 667                 break;
 668         case IWL_TM_CMD_APP2DEV_REG_READ32:
 669         case IWL_TM_CMD_APP2DEV_REG_WRITE32:
 670         case IWL_TM_CMD_APP2DEV_REG_WRITE8:
 671                 IWL_DEBUG_INFO(priv, "testmode cmd to register\n");
 672                 result = iwl_testmode_reg(hw, tb);
 673                 break;
 674         case IWL_TM_CMD_APP2DEV_GET_DEVICENAME:
 675         case IWL_TM_CMD_APP2DEV_LOAD_INIT_FW:
 676         case IWL_TM_CMD_APP2DEV_CFG_INIT_CALIB:
 677         case IWL_TM_CMD_APP2DEV_LOAD_RUNTIME_FW:
 678         case IWL_TM_CMD_APP2DEV_GET_EEPROM:
 679         case IWL_TM_CMD_APP2DEV_FIXRATE_REQ:
 680                 IWL_DEBUG_INFO(priv, "testmode cmd to driver\n");
 681                 result = iwl_testmode_driver(hw, tb);
 682                 break;
 683
 684         case IWL_TM_CMD_APP2DEV_BEGIN_TRACE:
 685         case IWL_TM_CMD_APP2DEV_END_TRACE:
 686         case IWL_TM_CMD_APP2DEV_READ_TRACE:
 687                 IWL_DEBUG_INFO(priv, "testmode uCode trace cmd to driver\n");
 688                 result = iwl_testmode_trace(hw, tb);
 689                 break;
 690
 691         case IWL_TM_CMD_APP2DEV_OWNERSHIP:
 692                 IWL_DEBUG_INFO(priv, "testmode change uCode ownership\n");
 693                 result = iwl_testmode_ownership(hw, tb);
 694                 break;
 695
 696         default:
 697                 IWL_DEBUG_INFO(priv, "Unknown testmode command\n");
 698                 result = -ENOSYS;
 699                 break;
 700         }
 701
 702         mutex_unlock(&priv->shrd->mutex);
 703         return result;
 704 }
 705
 706 int iwlagn_mac_testmode_dump(struct ieee80211_hw *hw, struct sk_buff *skb,
 707                       struct netlink_callback *cb,
 708                       void *data, int len)
 709 {
 710         struct nlattr *tb[IWL_TM_ATTR_MAX];
 711         struct iwl_priv *priv = hw->priv;
 712         int result;
 713         u32 cmd;
 714
 715         if (cb->args[3]) {
 716                 /* offset by 1 since commands start at 0 */
 717                 cmd = cb->args[3] - 1;
 718         } else {
 719                 result = nla_parse(tb, IWL_TM_ATTR_MAX - 1, data, len,
 720                                 iwl_testmode_gnl_msg_policy);
 721                 if (result) {
 722                         IWL_DEBUG_INFO(priv,
 723                                "Error parsing the gnl message : %d\n", result);
 724                         return result;
 725                 }
 726
 727                 /* IWL_TM_ATTR_COMMAND is absolutely mandatory */
 728                 if (!tb[IWL_TM_ATTR_COMMAND]) {
 729                         IWL_DEBUG_INFO(priv,
 730                                 "Error finding testmode command type\n");
 731                         return -ENOMSG;
 732                 }
 733                 cmd = nla_get_u32(tb[IWL_TM_ATTR_COMMAND]);
 734                 cb->args[3] = cmd + 1;
 735         }
 736
 737         /* in case multiple accesses to the device happens */
 738         mutex_lock(&priv->shrd->mutex);
 739         switch (cmd) {
 740         case IWL_TM_CMD_APP2DEV_READ_TRACE:
 741                 IWL_DEBUG_INFO(priv, "uCode trace cmd to driver\n");
 742                 result = iwl_testmode_trace_dump(hw, tb, skb, cb);
 743                 break;
 744         default:
 745                 result = -EINVAL;
 746                 break;
 747         }
 748
 749         mutex_unlock(&priv->shrd->mutex);
 750         return result;
 751 }