drivers/net/wireless/iwlwifi/iwl-testmode.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 <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-wifi.h"
  74 #include "iwl-dev.h"
  75 #include "iwl-core.h"
  76 #include "iwl-debug.h"
  77 #include "iwl-io.h"
  78 #include "iwl-agn.h"
  79 #include "iwl-testmode.h"
  80 #include "iwl-trans.h"
  81 #include "iwl-bus.h"
  82
  83 /* The TLVs used in the gnl message policy between the kernel module and
  84  * user space application. iwl_testmode_gnl_msg_policy is to be carried
  85  * through the NL80211_CMD_TESTMODE channel regulated by nl80211.
  86  * See iwl-testmode.h
  87  */
  88 static
  89 struct nla_policy iwl_testmode_gnl_msg_policy[IWL_TM_ATTR_MAX] = {
  90         [IWL_TM_ATTR_COMMAND] = { .type = NLA_U32, },
  91
  92         [IWL_TM_ATTR_UCODE_CMD_ID] = { .type = NLA_U8, },
  93         [IWL_TM_ATTR_UCODE_CMD_DATA] = { .type = NLA_UNSPEC, },
  94
  95         [IWL_TM_ATTR_REG_OFFSET] = { .type = NLA_U32, },
  96         [IWL_TM_ATTR_REG_VALUE8] = { .type = NLA_U8, },
  97         [IWL_TM_ATTR_REG_VALUE32] = { .type = NLA_U32, },
  98
  99         [IWL_TM_ATTR_SYNC_RSP] = { .type = NLA_UNSPEC, },
 100         [IWL_TM_ATTR_UCODE_RX_PKT] = { .type = NLA_UNSPEC, },
 101
 102         [IWL_TM_ATTR_EEPROM] = { .type = NLA_UNSPEC, },
 103
 104         [IWL_TM_ATTR_TRACE_ADDR] = { .type = NLA_UNSPEC, },
 105         [IWL_TM_ATTR_TRACE_DUMP] = { .type = NLA_UNSPEC, },
 106         [IWL_TM_ATTR_TRACE_SIZE] = { .type = NLA_U32, },
 107
 108         [IWL_TM_ATTR_FIXRATE] = { .type = NLA_U32, },
 109
 110         [IWL_TM_ATTR_UCODE_OWNER] = { .type = NLA_U8, },
 111
 112         [IWL_TM_ATTR_SRAM_ADDR] = { .type = NLA_U32, },
 113         [IWL_TM_ATTR_SRAM_SIZE] = { .type = NLA_U32, },
 114         [IWL_TM_ATTR_SRAM_DUMP] = { .type = NLA_UNSPEC, },
 115
 116         [IWL_TM_ATTR_FW_VERSION] = { .type = NLA_U32, },
 117         [IWL_TM_ATTR_DEVICE_ID] = { .type = NLA_U32, },
 118 };
 119
 120 /*
 121  * See the struct iwl_rx_packet in iwl-commands.h for the format of the
 122  * received events from the device
 123  */
 124 static inline int get_event_length(struct iwl_rx_mem_buffer *rxb)
 125 {
 126         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 127         if (pkt)
 128                 return le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
 129         else
 130                 return 0;
 131 }
 132
 133
 134 /*
 135  * This function multicasts the spontaneous messages from the device to the
 136  * user space. It is invoked whenever there is a received messages
 137  * from the device. This function is called within the ISR of the rx handlers
 138  * in iwlagn driver.
 139  *
 140  * The parsing of the message content is left to the user space application,
 141  * The message content is treated as unattacked raw data and is encapsulated
 142  * with IWL_TM_ATTR_UCODE_RX_PKT multicasting to the user space.
 143  *
 144  * @priv: the instance of iwlwifi device
 145  * @rxb: pointer to rx data content received by the ISR
 146  *
 147  * See the message policies and TLVs in iwl_testmode_gnl_msg_policy[].
 148  * For the messages multicasting to the user application, the mandatory
 149  * TLV fields are :
 150  *      IWL_TM_ATTR_COMMAND must be IWL_TM_CMD_DEV2APP_UCODE_RX_PKT
 151  *      IWL_TM_ATTR_UCODE_RX_PKT for carrying the message content
 152  */
 153
 154 static void iwl_testmode_ucode_rx_pkt(struct iwl_priv *priv,
 155                                 struct iwl_rx_mem_buffer *rxb)
 156 {
 157         struct ieee80211_hw *hw = priv->hw;
 158         struct sk_buff *skb;
 159         void *data;
 160         int length;
 161
 162         data = (void *)rxb_addr(rxb);
 163         length = get_event_length(rxb);
 164
 165         if (!data || length == 0)
 166                 return;
 167
 168         skb = cfg80211_testmode_alloc_event_skb(hw->wiphy, 20 + length,
 169                                                                 GFP_ATOMIC);
 170         if (skb == NULL) {
 171                 IWL_DEBUG_INFO(priv,
 172                          "Run out of memory for messages to user space ?\n");
 173                 return;
 174         }
 175         NLA_PUT_U32(skb, IWL_TM_ATTR_COMMAND, IWL_TM_CMD_DEV2APP_UCODE_RX_PKT);
 176         NLA_PUT(skb, IWL_TM_ATTR_UCODE_RX_PKT, length, data);
 177         cfg80211_testmode_event(skb, GFP_ATOMIC);
 178         return;
 179
 180 nla_put_failure:
 181         kfree_skb(skb);
 182         IWL_DEBUG_INFO(priv, "Ouch, overran buffer, check allocation!\n");
 183 }
 184
 185 void iwl_testmode_init(struct iwl_priv *priv)
 186 {
 187         priv->pre_rx_handler = iwl_testmode_ucode_rx_pkt;
 188         priv->testmode_trace.trace_enabled = false;
 189         priv->testmode_sram.sram_readed = false;
 190 }
 191
 192 static void iwl_sram_cleanup(struct iwl_priv *priv)
 193 {
 194         if (priv->testmode_sram.sram_readed) {
 195                 kfree(priv->testmode_sram.buff_addr);
 196                 priv->testmode_sram.buff_addr = NULL;
 197                 priv->testmode_sram.buff_size = 0;
 198                 priv->testmode_sram.num_chunks = 0;
 199                 priv->testmode_sram.sram_readed = false;
 200         }
 201 }
 202
 203 static void iwl_trace_cleanup(struct iwl_priv *priv)
 204 {
 205         if (priv->testmode_trace.trace_enabled) {
 206                 if (priv->testmode_trace.cpu_addr &&
 207                     priv->testmode_trace.dma_addr)
 208                         dma_free_coherent(bus(priv)->dev,
 209                                         priv->testmode_trace.total_size,
 210                                         priv->testmode_trace.cpu_addr,
 211                                         priv->testmode_trace.dma_addr);
 212                 priv->testmode_trace.trace_enabled = false;
 213                 priv->testmode_trace.cpu_addr = NULL;
 214                 priv->testmode_trace.trace_addr = NULL;
 215                 priv->testmode_trace.dma_addr = 0;
 216                 priv->testmode_trace.buff_size = 0;
 217                 priv->testmode_trace.total_size = 0;
 218         }
 219 }
 220
 221
 222 void iwl_testmode_cleanup(struct iwl_priv *priv)
 223 {
 224         iwl_trace_cleanup(priv);
 225         iwl_sram_cleanup(priv);
 226 }
 227
 228 /*
 229  * This function handles the user application commands to the ucode.
 230  *
 231  * It retrieves the mandatory fields IWL_TM_ATTR_UCODE_CMD_ID and
 232  * IWL_TM_ATTR_UCODE_CMD_DATA and calls to the handler to send the
 233  * host command to the ucode.
 234  *
 235  * If any mandatory field is missing, -ENOMSG is replied to the user space
 236  * application; otherwise, the actual execution result of the host command to
 237  * ucode is replied.
 238  *
 239  * @hw: ieee80211_hw object that represents the device
 240  * @tb: gnl message fields from the user space
 241  */
 242 static int iwl_testmode_ucode(struct ieee80211_hw *hw, struct nlattr **tb)
 243 {
 244         struct iwl_priv *priv = hw->priv;
 245         struct iwl_host_cmd cmd;
 246
 247         memset(&cmd, 0, sizeof(struct iwl_host_cmd));
 248
 249         if (!tb[IWL_TM_ATTR_UCODE_CMD_ID] ||
 250             !tb[IWL_TM_ATTR_UCODE_CMD_DATA]) {
 251                 IWL_DEBUG_INFO(priv,
 252                         "Error finding ucode command mandatory fields\n");
 253                 return -ENOMSG;
 254         }
 255
 256         cmd.flags = CMD_ON_DEMAND;
 257         cmd.id = nla_get_u8(tb[IWL_TM_ATTR_UCODE_CMD_ID]);
 258         cmd.data[0] = nla_data(tb[IWL_TM_ATTR_UCODE_CMD_DATA]);
 259         cmd.len[0] = nla_len(tb[IWL_TM_ATTR_UCODE_CMD_DATA]);
 260         cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
 261         IWL_INFO(priv, "testmode ucode command ID 0x%x, flags 0x%x,"
 262                                 " len %d\n", cmd.id, cmd.flags, cmd.len[0]);
 263         /* ok, let's submit the command to ucode */
 264         return iwl_trans_send_cmd(trans(priv), &cmd);
 265 }
 266
 267
 268 /*
 269  * This function handles the user application commands for register access.
 270  *
 271  * It retrieves command ID carried with IWL_TM_ATTR_COMMAND and calls to the
 272  * handlers respectively.
 273  *
 274  * If it's an unknown commdn ID, -ENOSYS is returned; or -ENOMSG if the
 275  * mandatory fields(IWL_TM_ATTR_REG_OFFSET,IWL_TM_ATTR_REG_VALUE32,
 276  * IWL_TM_ATTR_REG_VALUE8) are missing; Otherwise 0 is replied indicating
 277  * the success of the command execution.
 278  *
 279  * If IWL_TM_ATTR_COMMAND is IWL_TM_CMD_APP2DEV_REG_READ32, the register read
 280  * value is returned with IWL_TM_ATTR_REG_VALUE32.
 281  *
 282  * @hw: ieee80211_hw object that represents the device
 283  * @tb: gnl message fields from the user space
 284  */
 285 static int iwl_testmode_reg(struct ieee80211_hw *hw, struct nlattr **tb)
 286 {
 287         struct iwl_priv *priv = hw->priv;
 288         u32 ofs, val32;
 289         u8 val8;
 290         struct sk_buff *skb;
 291         int status = 0;
 292
 293         if (!tb[IWL_TM_ATTR_REG_OFFSET]) {
 294                 IWL_DEBUG_INFO(priv, "Error finding register offset\n");
 295                 return -ENOMSG;
 296         }
 297         ofs = nla_get_u32(tb[IWL_TM_ATTR_REG_OFFSET]);
 298         IWL_INFO(priv, "testmode register access command offset 0x%x\n", ofs);
 299
 300         switch (nla_get_u32(tb[IWL_TM_ATTR_COMMAND])) {
 301         case IWL_TM_CMD_APP2DEV_DIRECT_REG_READ32:
 302                 val32 = iwl_read32(bus(priv), ofs);
 303                 IWL_INFO(priv, "32bit value to read 0x%x\n", val32);
 304
 305                 skb = cfg80211_testmode_alloc_reply_skb(hw->wiphy, 20);
 306                 if (!skb) {
 307                         IWL_DEBUG_INFO(priv, "Error allocating memory\n");
 308                         return -ENOMEM;
 309                 }
 310                 NLA_PUT_U32(skb, IWL_TM_ATTR_REG_VALUE32, val32);
 311                 status = cfg80211_testmode_reply(skb);
 312                 if (status < 0)
 313                         IWL_DEBUG_INFO(priv,
 314                                        "Error sending msg : %d\n", status);
 315                 break;
 316         case IWL_TM_CMD_APP2DEV_DIRECT_REG_WRITE32:
 317                 if (!tb[IWL_TM_ATTR_REG_VALUE32]) {
 318                         IWL_DEBUG_INFO(priv,
 319                                        "Error finding value to write\n");
 320                         return -ENOMSG;
 321                 } else {
 322                         val32 = nla_get_u32(tb[IWL_TM_ATTR_REG_VALUE32]);
 323                         IWL_INFO(priv, "32bit value to write 0x%x\n", val32);
 324                         iwl_write32(bus(priv), ofs, val32);
 325                 }
 326                 break;
 327         case IWL_TM_CMD_APP2DEV_DIRECT_REG_WRITE8:
 328                 if (!tb[IWL_TM_ATTR_REG_VALUE8]) {
 329                         IWL_DEBUG_INFO(priv, "Error finding value to write\n");
 330                         return -ENOMSG;
 331                 } else {
 332                         val8 = nla_get_u8(tb[IWL_TM_ATTR_REG_VALUE8]);
 333                         IWL_INFO(priv, "8bit value to write 0x%x\n", val8);
 334                         iwl_write8(bus(priv), ofs, val8);
 335                 }
 336                 break;
 337         case IWL_TM_CMD_APP2DEV_INDIRECT_REG_READ32:
 338                 val32 = iwl_read_prph(bus(priv), ofs);
 339                 IWL_INFO(priv, "32bit value to read 0x%x\n", val32);
 340
 341                 skb = cfg80211_testmode_alloc_reply_skb(hw->wiphy, 20);
 342                 if (!skb) {
 343                         IWL_DEBUG_INFO(priv, "Error allocating memory\n");
 344                         return -ENOMEM;
 345                 }
 346                 NLA_PUT_U32(skb, IWL_TM_ATTR_REG_VALUE32, val32);
 347                 status = cfg80211_testmode_reply(skb);
 348                 if (status < 0)
 349                         IWL_DEBUG_INFO(priv,
 350                                         "Error sending msg : %d\n", status);
 351                 break;
 352         case IWL_TM_CMD_APP2DEV_INDIRECT_REG_WRITE32:
 353                 if (!tb[IWL_TM_ATTR_REG_VALUE32]) {
 354                         IWL_DEBUG_INFO(priv,
 355                                         "Error finding value to write\n");
 356                         return -ENOMSG;
 357                 } else {
 358                         val32 = nla_get_u32(tb[IWL_TM_ATTR_REG_VALUE32]);
 359                         IWL_INFO(priv, "32bit value to write 0x%x\n", val32);
 360                         iwl_write_prph(bus(priv), ofs, val32);
 361                 }
 362                 break;
 363         default:
 364                 IWL_DEBUG_INFO(priv, "Unknown testmode register command ID\n");
 365                 return -ENOSYS;
 366         }
 367
 368         return status;
 369
 370 nla_put_failure:
 371         kfree_skb(skb);
 372         return -EMSGSIZE;
 373 }
 374
 375
 376 static int iwl_testmode_cfg_init_calib(struct iwl_priv *priv)
 377 {
 378         struct iwl_notification_wait calib_wait;
 379         int ret;
 380
 381         iwl_init_notification_wait(priv->shrd, &calib_wait,
 382                                       CALIBRATION_COMPLETE_NOTIFICATION,
 383                                       NULL, NULL);
 384         ret = iwl_init_alive_start(trans(priv));
 385         if (ret) {
 386                 IWL_DEBUG_INFO(priv,
 387                         "Error configuring init calibration: %d\n", ret);
 388                 goto cfg_init_calib_error;
 389         }
 390
 391         ret = iwl_wait_notification(priv->shrd, &calib_wait, 2 * HZ);
 392         if (ret)
 393                 IWL_DEBUG_INFO(priv, "Error detecting"
 394                         " CALIBRATION_COMPLETE_NOTIFICATION: %d\n", ret);
 395         return ret;
 396
 397 cfg_init_calib_error:
 398         iwl_remove_notification(priv->shrd, &calib_wait);
 399         return ret;
 400 }
 401
 402 /*
 403  * This function handles the user application commands for driver.
 404  *
 405  * It retrieves command ID carried with IWL_TM_ATTR_COMMAND and calls to the
 406  * handlers respectively.
 407  *
 408  * If it's an unknown commdn ID, -ENOSYS is replied; otherwise, the returned
 409  * value of the actual command execution is replied to the user application.
 410  *
 411  * If there's any message responding to the user space, IWL_TM_ATTR_SYNC_RSP
 412  * is used for carry the message while IWL_TM_ATTR_COMMAND must set to
 413  * IWL_TM_CMD_DEV2APP_SYNC_RSP.
 414  *
 415  * @hw: ieee80211_hw object that represents the device
 416  * @tb: gnl message fields from the user space
 417  */
 418 static int iwl_testmode_driver(struct ieee80211_hw *hw, struct nlattr **tb)
 419 {
 420         struct iwl_priv *priv = hw->priv;
 421         struct iwl_trans *trans = trans(priv);
 422         struct sk_buff *skb;
 423         unsigned char *rsp_data_ptr = NULL;
 424         int status = 0, rsp_data_len = 0;
 425         u32 devid;
 426
 427         switch (nla_get_u32(tb[IWL_TM_ATTR_COMMAND])) {
 428         case IWL_TM_CMD_APP2DEV_GET_DEVICENAME:
 429                 rsp_data_ptr = (unsigned char *)cfg(priv)->name;
 430                 rsp_data_len = strlen(cfg(priv)->name);
 431                 skb = cfg80211_testmode_alloc_reply_skb(hw->wiphy,
 432                                                         rsp_data_len + 20);
 433                 if (!skb) {
 434                         IWL_DEBUG_INFO(priv,
 435                                        "Error allocating memory\n");
 436                         return -ENOMEM;
 437                 }
 438                 NLA_PUT_U32(skb, IWL_TM_ATTR_COMMAND,
 439                             IWL_TM_CMD_DEV2APP_SYNC_RSP);
 440                 NLA_PUT(skb, IWL_TM_ATTR_SYNC_RSP,
 441                         rsp_data_len, rsp_data_ptr);
 442                 status = cfg80211_testmode_reply(skb);
 443                 if (status < 0)
 444                         IWL_DEBUG_INFO(priv, "Error sending msg : %d\n",
 445                                        status);
 446                 break;
 447
 448         case IWL_TM_CMD_APP2DEV_LOAD_INIT_FW:
 449                 status = iwl_load_ucode_wait_alive(trans, IWL_UCODE_INIT);
 450                 if (status)
 451                         IWL_DEBUG_INFO(priv,
 452                                 "Error loading init ucode: %d\n", status);
 453                 break;
 454
 455         case IWL_TM_CMD_APP2DEV_CFG_INIT_CALIB:
 456                 iwl_testmode_cfg_init_calib(priv);
 457                 iwl_trans_stop_device(trans);
 458                 break;
 459
 460         case IWL_TM_CMD_APP2DEV_LOAD_RUNTIME_FW:
 461                 status = iwl_load_ucode_wait_alive(trans, IWL_UCODE_REGULAR);
 462                 if (status) {
 463                         IWL_DEBUG_INFO(priv,
 464                                 "Error loading runtime ucode: %d\n", status);
 465                         break;
 466                 }
 467                 status = iwl_alive_start(priv);
 468                 if (status)
 469                         IWL_DEBUG_INFO(priv,
 470                                 "Error starting the device: %d\n", status);
 471                 break;
 472
 473         case IWL_TM_CMD_APP2DEV_LOAD_WOWLAN_FW:
 474                 iwl_scan_cancel_timeout(priv, 200);
 475                 iwl_trans_stop_device(trans);
 476                 status = iwl_load_ucode_wait_alive(trans, IWL_UCODE_WOWLAN);
 477                 if (status) {
 478                         IWL_DEBUG_INFO(priv,
 479                                 "Error loading WOWLAN ucode: %d\n", status);
 480                         break;
 481                 }
 482                 status = iwl_alive_start(priv);
 483                 if (status)
 484                         IWL_DEBUG_INFO(priv,
 485                                 "Error starting the device: %d\n", status);
 486                 break;
 487
 488         case IWL_TM_CMD_APP2DEV_GET_EEPROM:
 489                 if (priv->shrd->eeprom) {
 490                         skb = cfg80211_testmode_alloc_reply_skb(hw->wiphy,
 491                                 cfg(priv)->base_params->eeprom_size + 20);
 492                         if (!skb) {
 493                                 IWL_DEBUG_INFO(priv,
 494                                        "Error allocating memory\n");
 495                                 return -ENOMEM;
 496                         }
 497                         NLA_PUT_U32(skb, IWL_TM_ATTR_COMMAND,
 498                                 IWL_TM_CMD_DEV2APP_EEPROM_RSP);
 499                         NLA_PUT(skb, IWL_TM_ATTR_EEPROM,
 500                                 cfg(priv)->base_params->eeprom_size,
 501                                 priv->shrd->eeprom);
 502                         status = cfg80211_testmode_reply(skb);
 503                         if (status < 0)
 504                                 IWL_DEBUG_INFO(priv,
 505                                                "Error sending msg : %d\n",
 506                                                status);
 507                 } else
 508                         return -EFAULT;
 509                 break;
 510
 511         case IWL_TM_CMD_APP2DEV_FIXRATE_REQ:
 512                 if (!tb[IWL_TM_ATTR_FIXRATE]) {
 513                         IWL_DEBUG_INFO(priv,
 514                                        "Error finding fixrate setting\n");
 515                         return -ENOMSG;
 516                 }
 517                 priv->tm_fixed_rate = nla_get_u32(tb[IWL_TM_ATTR_FIXRATE]);
 518                 break;
 519
 520         case IWL_TM_CMD_APP2DEV_GET_FW_VERSION:
 521                 IWL_INFO(priv, "uCode version raw: 0x%x\n", priv->ucode_ver);
 522
 523                 skb = cfg80211_testmode_alloc_reply_skb(hw->wiphy, 20);
 524                 if (!skb) {
 525                         IWL_DEBUG_INFO(priv, "Error allocating memory\n");
 526                         return -ENOMEM;
 527                 }
 528                 NLA_PUT_U32(skb, IWL_TM_ATTR_FW_VERSION, priv->ucode_ver);
 529                 status = cfg80211_testmode_reply(skb);
 530                 if (status < 0)
 531                         IWL_DEBUG_INFO(priv,
 532                                         "Error sending msg : %d\n", status);
 533                 break;
 534
 535         case IWL_TM_CMD_APP2DEV_GET_DEVICE_ID:
 536                 devid = bus_get_hw_id(bus(priv));
 537                 IWL_INFO(priv, "hw version: 0x%x\n", devid);
 538
 539                 skb = cfg80211_testmode_alloc_reply_skb(hw->wiphy, 20);
 540                 if (!skb) {
 541                         IWL_DEBUG_INFO(priv, "Error allocating memory\n");
 542                         return -ENOMEM;
 543                 }
 544                 NLA_PUT_U32(skb, IWL_TM_ATTR_DEVICE_ID, devid);
 545                 status = cfg80211_testmode_reply(skb);
 546                 if (status < 0)
 547                         IWL_DEBUG_INFO(priv,
 548                                         "Error sending msg : %d\n", status);
 549                 break;
 550
 551         default:
 552                 IWL_DEBUG_INFO(priv, "Unknown testmode driver command ID\n");
 553                 return -ENOSYS;
 554         }
 555         return status;
 556
 557 nla_put_failure:
 558         kfree_skb(skb);
 559         return -EMSGSIZE;
 560 }
 561
 562
 563 /*
 564  * This function handles the user application commands for uCode trace
 565  *
 566  * It retrieves command ID carried with IWL_TM_ATTR_COMMAND and calls to the
 567  * handlers respectively.
 568  *
 569  * If it's an unknown commdn ID, -ENOSYS is replied; otherwise, the returned
 570  * value of the actual command execution is replied to the user application.
 571  *
 572  * @hw: ieee80211_hw object that represents the device
 573  * @tb: gnl message fields from the user space
 574  */
 575 static int iwl_testmode_trace(struct ieee80211_hw *hw, struct nlattr **tb)
 576 {
 577         struct iwl_priv *priv = hw->priv;
 578         struct sk_buff *skb;
 579         int status = 0;
 580         struct device *dev = bus(priv)->dev;
 581
 582         switch (nla_get_u32(tb[IWL_TM_ATTR_COMMAND])) {
 583         case IWL_TM_CMD_APP2DEV_BEGIN_TRACE:
 584                 if (priv->testmode_trace.trace_enabled)
 585                         return -EBUSY;
 586
 587                 if (!tb[IWL_TM_ATTR_TRACE_SIZE])
 588                         priv->testmode_trace.buff_size = TRACE_BUFF_SIZE_DEF;
 589                 else
 590                         priv->testmode_trace.buff_size =
 591                                 nla_get_u32(tb[IWL_TM_ATTR_TRACE_SIZE]);
 592                 if (!priv->testmode_trace.buff_size)
 593                         return -EINVAL;
 594                 if (priv->testmode_trace.buff_size < TRACE_BUFF_SIZE_MIN ||
 595                     priv->testmode_trace.buff_size > TRACE_BUFF_SIZE_MAX)
 596                         return -EINVAL;
 597
 598                 priv->testmode_trace.total_size =
 599                         priv->testmode_trace.buff_size + TRACE_BUFF_PADD;
 600                 priv->testmode_trace.cpu_addr =
 601                         dma_alloc_coherent(dev,
 602                                            priv->testmode_trace.total_size,
 603                                            &priv->testmode_trace.dma_addr,
 604                                            GFP_KERNEL);
 605                 if (!priv->testmode_trace.cpu_addr)
 606                         return -ENOMEM;
 607                 priv->testmode_trace.trace_enabled = true;
 608                 priv->testmode_trace.trace_addr = (u8 *)PTR_ALIGN(
 609                         priv->testmode_trace.cpu_addr, 0x100);
 610                 memset(priv->testmode_trace.trace_addr, 0x03B,
 611                         priv->testmode_trace.buff_size);
 612                 skb = cfg80211_testmode_alloc_reply_skb(hw->wiphy,
 613                         sizeof(priv->testmode_trace.dma_addr) + 20);
 614                 if (!skb) {
 615                         IWL_DEBUG_INFO(priv,
 616                                 "Error allocating memory\n");
 617                         iwl_trace_cleanup(priv);
 618                         return -ENOMEM;
 619                 }
 620                 NLA_PUT(skb, IWL_TM_ATTR_TRACE_ADDR,
 621                         sizeof(priv->testmode_trace.dma_addr),
 622                         (u64 *)&priv->testmode_trace.dma_addr);
 623                 status = cfg80211_testmode_reply(skb);
 624                 if (status < 0) {
 625                         IWL_DEBUG_INFO(priv,
 626                                        "Error sending msg : %d\n",
 627                                        status);
 628                 }
 629                 priv->testmode_trace.num_chunks =
 630                         DIV_ROUND_UP(priv->testmode_trace.buff_size,
 631                                      DUMP_CHUNK_SIZE);
 632                 break;
 633
 634         case IWL_TM_CMD_APP2DEV_END_TRACE:
 635                 iwl_trace_cleanup(priv);
 636                 break;
 637         default:
 638                 IWL_DEBUG_INFO(priv, "Unknown testmode mem command ID\n");
 639                 return -ENOSYS;
 640         }
 641         return status;
 642
 643 nla_put_failure:
 644         kfree_skb(skb);
 645         if (nla_get_u32(tb[IWL_TM_ATTR_COMMAND]) ==
 646             IWL_TM_CMD_APP2DEV_BEGIN_TRACE)
 647                 iwl_trace_cleanup(priv);
 648         return -EMSGSIZE;
 649 }
 650
 651 static int iwl_testmode_trace_dump(struct ieee80211_hw *hw, struct nlattr **tb,
 652                                    struct sk_buff *skb,
 653                                    struct netlink_callback *cb)
 654 {
 655         struct iwl_priv *priv = hw->priv;
 656         int idx, length;
 657
 658         if (priv->testmode_trace.trace_enabled &&
 659             priv->testmode_trace.trace_addr) {
 660                 idx = cb->args[4];
 661                 if (idx >= priv->testmode_trace.num_chunks)
 662                         return -ENOENT;
 663                 length = DUMP_CHUNK_SIZE;
 664                 if (((idx + 1) == priv->testmode_trace.num_chunks) &&
 665                     (priv->testmode_trace.buff_size % DUMP_CHUNK_SIZE))
 666                         length = priv->testmode_trace.buff_size %
 667                                 DUMP_CHUNK_SIZE;
 668
 669                 NLA_PUT(skb, IWL_TM_ATTR_TRACE_DUMP, length,
 670                         priv->testmode_trace.trace_addr +
 671                         (DUMP_CHUNK_SIZE * idx));
 672                 idx++;
 673                 cb->args[4] = idx;
 674                 return 0;
 675         } else
 676                 return -EFAULT;
 677
 678  nla_put_failure:
 679         return -ENOBUFS;
 680 }
 681
 682 /*
 683  * This function handles the user application switch ucode ownership.
 684  *
 685  * It retrieves the mandatory fields IWL_TM_ATTR_UCODE_OWNER and
 686  * decide who the current owner of the uCode
 687  *
 688  * If the current owner is OWNERSHIP_TM, then the only host command
 689  * can deliver to uCode is from testmode, all the other host commands
 690  * will dropped.
 691  *
 692  * default driver is the owner of uCode in normal operational mode
 693  *
 694  * @hw: ieee80211_hw object that represents the device
 695  * @tb: gnl message fields from the user space
 696  */
 697 static int iwl_testmode_ownership(struct ieee80211_hw *hw, struct nlattr **tb)
 698 {
 699         struct iwl_priv *priv = hw->priv;
 700         u8 owner;
 701
 702         if (!tb[IWL_TM_ATTR_UCODE_OWNER]) {
 703                 IWL_DEBUG_INFO(priv, "Error finding ucode owner\n");
 704                 return -ENOMSG;
 705         }
 706
 707         owner = nla_get_u8(tb[IWL_TM_ATTR_UCODE_OWNER]);
 708         if ((owner == IWL_OWNERSHIP_DRIVER) || (owner == IWL_OWNERSHIP_TM))
 709                 priv->shrd->ucode_owner = owner;
 710         else {
 711                 IWL_DEBUG_INFO(priv, "Invalid owner\n");
 712                 return -EINVAL;
 713         }
 714         return 0;
 715 }
 716
 717 /*
 718  * This function handles the user application commands for SRAM data dump
 719  *
 720  * It retrieves the mandatory fields IWL_TM_ATTR_SRAM_ADDR and
 721  * IWL_TM_ATTR_SRAM_SIZE to decide the memory area for SRAM data reading
 722  *
 723  * Several error will be retured, -EBUSY if the SRAM data retrieved by
 724  * previous command has not been delivered to userspace, or -ENOMSG if
 725  * the mandatory fields (IWL_TM_ATTR_SRAM_ADDR,IWL_TM_ATTR_SRAM_SIZE)
 726  * are missing, or -ENOMEM if the buffer allocation fails.
 727  *
 728  * Otherwise 0 is replied indicating the success of the SRAM reading.
 729  *
 730  * @hw: ieee80211_hw object that represents the device
 731  * @tb: gnl message fields from the user space
 732  */
 733 static int iwl_testmode_sram(struct ieee80211_hw *hw, struct nlattr **tb)
 734 {
 735         struct iwl_priv *priv = hw->priv;
 736         u32 base, ofs, size, maxsize;
 737
 738         if (priv->testmode_sram.sram_readed)
 739                 return -EBUSY;
 740
 741         if (!tb[IWL_TM_ATTR_SRAM_ADDR]) {
 742                 IWL_DEBUG_INFO(priv, "Error finding SRAM offset address\n");
 743                 return -ENOMSG;
 744         }
 745         ofs = nla_get_u32(tb[IWL_TM_ATTR_SRAM_ADDR]);
 746         if (!tb[IWL_TM_ATTR_SRAM_SIZE]) {
 747                 IWL_DEBUG_INFO(priv, "Error finding size for SRAM reading\n");
 748                 return -ENOMSG;
 749         }
 750         size = nla_get_u32(tb[IWL_TM_ATTR_SRAM_SIZE]);
 751         switch (priv->shrd->ucode_type) {
 752         case IWL_UCODE_REGULAR:
 753                 maxsize = trans(priv)->ucode_rt.data.len;
 754                 break;
 755         case IWL_UCODE_INIT:
 756                 maxsize = trans(priv)->ucode_init.data.len;
 757                 break;
 758         case IWL_UCODE_WOWLAN:
 759                 maxsize = trans(priv)->ucode_wowlan.data.len;
 760                 break;
 761         case IWL_UCODE_NONE:
 762                 IWL_DEBUG_INFO(priv, "Error, uCode does not been loaded\n");
 763                 return -ENOSYS;
 764         default:
 765                 IWL_DEBUG_INFO(priv, "Error, unsupported uCode type\n");
 766                 return -ENOSYS;
 767         }
 768         if ((ofs + size) > maxsize) {
 769                 IWL_DEBUG_INFO(priv, "Invalid offset/size: out of range\n");
 770                 return -EINVAL;
 771         }
 772         priv->testmode_sram.buff_size = (size / 4) * 4;
 773         priv->testmode_sram.buff_addr =
 774                 kmalloc(priv->testmode_sram.buff_size, GFP_KERNEL);
 775         if (priv->testmode_sram.buff_addr == NULL) {
 776                 IWL_DEBUG_INFO(priv, "Error allocating memory\n");
 777                 return -ENOMEM;
 778         }
 779         base = 0x800000;
 780         _iwl_read_targ_mem_words(bus(priv), base + ofs,
 781                                         priv->testmode_sram.buff_addr,
 782                                         priv->testmode_sram.buff_size / 4);
 783         priv->testmode_sram.num_chunks =
 784                 DIV_ROUND_UP(priv->testmode_sram.buff_size, DUMP_CHUNK_SIZE);
 785         priv->testmode_sram.sram_readed = true;
 786         return 0;
 787 }
 788
 789 static int iwl_testmode_sram_dump(struct ieee80211_hw *hw, struct nlattr **tb,
 790                                    struct sk_buff *skb,
 791                                    struct netlink_callback *cb)
 792 {
 793         struct iwl_priv *priv = hw->priv;
 794         int idx, length;
 795
 796         if (priv->testmode_sram.sram_readed) {
 797                 idx = cb->args[4];
 798                 if (idx >= priv->testmode_sram.num_chunks) {
 799                         iwl_sram_cleanup(priv);
 800                         return -ENOENT;
 801                 }
 802                 length = DUMP_CHUNK_SIZE;
 803                 if (((idx + 1) == priv->testmode_sram.num_chunks) &&
 804                     (priv->testmode_sram.buff_size % DUMP_CHUNK_SIZE))
 805                         length = priv->testmode_sram.buff_size %
 806                                 DUMP_CHUNK_SIZE;
 807
 808                 NLA_PUT(skb, IWL_TM_ATTR_SRAM_DUMP, length,
 809                         priv->testmode_sram.buff_addr +
 810                         (DUMP_CHUNK_SIZE * idx));
 811                 idx++;
 812                 cb->args[4] = idx;
 813                 return 0;
 814         } else
 815                 return -EFAULT;
 816
 817  nla_put_failure:
 818         return -ENOBUFS;
 819 }
 820
 821
 822 /* The testmode gnl message handler that takes the gnl message from the
 823  * user space and parses it per the policy iwl_testmode_gnl_msg_policy, then
 824  * invoke the corresponding handlers.
 825  *
 826  * This function is invoked when there is user space application sending
 827  * gnl message through the testmode tunnel NL80211_CMD_TESTMODE regulated
 828  * by nl80211.
 829  *
 830  * It retrieves the mandatory field, IWL_TM_ATTR_COMMAND, before
 831  * dispatching it to the corresponding handler.
 832  *
 833  * If IWL_TM_ATTR_COMMAND is missing, -ENOMSG is replied to user application;
 834  * -ENOSYS is replied to the user application if the command is unknown;
 835  * Otherwise, the command is dispatched to the respective handler.
 836  *
 837  * @hw: ieee80211_hw object that represents the device
 838  * @data: pointer to user space message
 839  * @len: length in byte of @data
 840  */
 841 int iwlagn_mac_testmode_cmd(struct ieee80211_hw *hw, void *data, int len)
 842 {
 843         struct nlattr *tb[IWL_TM_ATTR_MAX];
 844         struct iwl_priv *priv = hw->priv;
 845         int result;
 846
 847         result = nla_parse(tb, IWL_TM_ATTR_MAX - 1, data, len,
 848                         iwl_testmode_gnl_msg_policy);
 849         if (result != 0) {
 850                 IWL_DEBUG_INFO(priv,
 851                                "Error parsing the gnl message : %d\n", result);
 852                 return result;
 853         }
 854
 855         /* IWL_TM_ATTR_COMMAND is absolutely mandatory */
 856         if (!tb[IWL_TM_ATTR_COMMAND]) {
 857                 IWL_DEBUG_INFO(priv, "Error finding testmode command type\n");
 858                 return -ENOMSG;
 859         }
 860         /* in case multiple accesses to the device happens */
 861         mutex_lock(&priv->shrd->mutex);
 862
 863         switch (nla_get_u32(tb[IWL_TM_ATTR_COMMAND])) {
 864         case IWL_TM_CMD_APP2DEV_UCODE:
 865                 IWL_DEBUG_INFO(priv, "testmode cmd to uCode\n");
 866                 result = iwl_testmode_ucode(hw, tb);
 867                 break;
 868         case IWL_TM_CMD_APP2DEV_DIRECT_REG_READ32:
 869         case IWL_TM_CMD_APP2DEV_DIRECT_REG_WRITE32:
 870         case IWL_TM_CMD_APP2DEV_DIRECT_REG_WRITE8:
 871         case IWL_TM_CMD_APP2DEV_INDIRECT_REG_READ32:
 872         case IWL_TM_CMD_APP2DEV_INDIRECT_REG_WRITE32:
 873                 IWL_DEBUG_INFO(priv, "testmode cmd to register\n");
 874                 result = iwl_testmode_reg(hw, tb);
 875                 break;
 876         case IWL_TM_CMD_APP2DEV_GET_DEVICENAME:
 877         case IWL_TM_CMD_APP2DEV_LOAD_INIT_FW:
 878         case IWL_TM_CMD_APP2DEV_CFG_INIT_CALIB:
 879         case IWL_TM_CMD_APP2DEV_LOAD_RUNTIME_FW:
 880         case IWL_TM_CMD_APP2DEV_GET_EEPROM:
 881         case IWL_TM_CMD_APP2DEV_FIXRATE_REQ:
 882         case IWL_TM_CMD_APP2DEV_LOAD_WOWLAN_FW:
 883         case IWL_TM_CMD_APP2DEV_GET_FW_VERSION:
 884         case IWL_TM_CMD_APP2DEV_GET_DEVICE_ID:
 885                 IWL_DEBUG_INFO(priv, "testmode cmd to driver\n");
 886                 result = iwl_testmode_driver(hw, tb);
 887                 break;
 888
 889         case IWL_TM_CMD_APP2DEV_BEGIN_TRACE:
 890         case IWL_TM_CMD_APP2DEV_END_TRACE:
 891         case IWL_TM_CMD_APP2DEV_READ_TRACE:
 892                 IWL_DEBUG_INFO(priv, "testmode uCode trace cmd to driver\n");
 893                 result = iwl_testmode_trace(hw, tb);
 894                 break;
 895
 896         case IWL_TM_CMD_APP2DEV_OWNERSHIP:
 897                 IWL_DEBUG_INFO(priv, "testmode change uCode ownership\n");
 898                 result = iwl_testmode_ownership(hw, tb);
 899                 break;
 900
 901         case IWL_TM_CMD_APP2DEV_READ_SRAM:
 902                 IWL_DEBUG_INFO(priv, "testmode sram read cmd to driver\n");
 903                 result = iwl_testmode_sram(hw, tb);
 904                 break;
 905
 906         default:
 907                 IWL_DEBUG_INFO(priv, "Unknown testmode command\n");
 908                 result = -ENOSYS;
 909                 break;
 910         }
 911
 912         mutex_unlock(&priv->shrd->mutex);
 913         return result;
 914 }
 915
 916 int iwlagn_mac_testmode_dump(struct ieee80211_hw *hw, struct sk_buff *skb,
 917                       struct netlink_callback *cb,
 918                       void *data, int len)
 919 {
 920         struct nlattr *tb[IWL_TM_ATTR_MAX];
 921         struct iwl_priv *priv = hw->priv;
 922         int result;
 923         u32 cmd;
 924
 925         if (cb->args[3]) {
 926                 /* offset by 1 since commands start at 0 */
 927                 cmd = cb->args[3] - 1;
 928         } else {
 929                 result = nla_parse(tb, IWL_TM_ATTR_MAX - 1, data, len,
 930                                 iwl_testmode_gnl_msg_policy);
 931                 if (result) {
 932                         IWL_DEBUG_INFO(priv,
 933                                "Error parsing the gnl message : %d\n", result);
 934                         return result;
 935                 }
 936
 937                 /* IWL_TM_ATTR_COMMAND is absolutely mandatory */
 938                 if (!tb[IWL_TM_ATTR_COMMAND]) {
 939                         IWL_DEBUG_INFO(priv,
 940                                 "Error finding testmode command type\n");
 941                         return -ENOMSG;
 942                 }
 943                 cmd = nla_get_u32(tb[IWL_TM_ATTR_COMMAND]);
 944                 cb->args[3] = cmd + 1;
 945         }
 946
 947         /* in case multiple accesses to the device happens */
 948         mutex_lock(&priv->shrd->mutex);
 949         switch (cmd) {
 950         case IWL_TM_CMD_APP2DEV_READ_TRACE:
 951                 IWL_DEBUG_INFO(priv, "uCode trace cmd to driver\n");
 952                 result = iwl_testmode_trace_dump(hw, tb, skb, cb);
 953                 break;
 954         case IWL_TM_CMD_APP2DEV_DUMP_SRAM:
 955                 IWL_DEBUG_INFO(priv, "testmode sram dump cmd to driver\n");
 956                 result = iwl_testmode_sram_dump(hw, tb, skb, cb);
 957                 break;
 958         default:
 959                 result = -EINVAL;
 960                 break;
 961         }
 962
 963         mutex_unlock(&priv->shrd->mutex);
 964         return result;
 965 }