drivers/net/wireless/marvell/libertas/cmd.c

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This source file includes following definitions.
lbs_cmd_copyback
lbs_cmd_async_callback
is_command_allowed_in_ps
lbs_update_hw_spec
lbs_ret_host_sleep_cfg
lbs_host_sleep_cfg
lbs_set_ps_mode
lbs_cmd_802_11_sleep_params
lbs_wait_for_ds_awake
lbs_set_deep_sleep
lbs_ret_host_sleep_activate
lbs_set_host_sleep
lbs_set_snmp_mib
lbs_get_snmp_mib
lbs_get_tx_power
lbs_set_tx_power
lbs_set_monitor_mode
lbs_get_channel
lbs_update_channel
lbs_set_channel
lbs_get_rssi
lbs_set_11d_domain_info
lbs_get_reg
lbs_set_reg
lbs_queue_cmd
lbs_submit_command
__lbs_cleanup_and_insert_cmd
lbs_cleanup_and_insert_cmd
__lbs_complete_command
lbs_complete_command
lbs_set_radio
lbs_set_mac_control
lbs_set_mac_control_sync
lbs_allocate_cmd_buffer
lbs_free_cmd_buffer
lbs_get_free_cmd_node
lbs_execute_next_command
lbs_send_confirmsleep
lbs_ps_confirm_sleep
lbs_set_tpc_cfg
lbs_set_power_adapt_cfg
__lbs_cmd_async
lbs_cmd_async
__lbs_cmd
   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * This file contains the handling of command.
   4  * It prepares command and sends it to firmware when it is ready.
   5  */
   6 
   7 #include <linux/hardirq.h>
   8 #include <linux/kfifo.h>
   9 #include <linux/sched.h>
  10 #include <linux/slab.h>
  11 #include <linux/if_arp.h>
  12 #include <linux/export.h>
  13 
  14 #include "decl.h"
  15 #include "cfg.h"
  16 #include "cmd.h"
  17 
  18 #define CAL_NF(nf)              ((s32)(-(s32)(nf)))
  19 #define CAL_RSSI(snr, nf)       ((s32)((s32)(snr) + CAL_NF(nf)))
  20 
  21 /**
  22  * lbs_cmd_copyback - Simple callback that copies response back into command
  23  *
  24  * @priv:       A pointer to &struct lbs_private structure
  25  * @extra:      A pointer to the original command structure for which
  26  *              'resp' is a response
  27  * @resp:       A pointer to the command response
  28  *
  29  * returns:     0 on success, error on failure
  30  */
  31 int lbs_cmd_copyback(struct lbs_private *priv, unsigned long extra,
  32                      struct cmd_header *resp)
  33 {
  34         struct cmd_header *buf = (void *)extra;
  35         uint16_t copy_len;
  36 
  37         copy_len = min(le16_to_cpu(buf->size), le16_to_cpu(resp->size));
  38         memcpy(buf, resp, copy_len);
  39         return 0;
  40 }
  41 EXPORT_SYMBOL_GPL(lbs_cmd_copyback);
  42 
  43 /**
  44  *  lbs_cmd_async_callback - Simple callback that ignores the result.
  45  *  Use this if you just want to send a command to the hardware, but don't
  46  *  care for the result.
  47  *
  48  *  @priv:      ignored
  49  *  @extra:     ignored
  50  *  @resp:      ignored
  51  *
  52  *  returns:    0 for success
  53  */
  54 static int lbs_cmd_async_callback(struct lbs_private *priv, unsigned long extra,
  55                      struct cmd_header *resp)
  56 {
  57         return 0;
  58 }
  59 
  60 
  61 /**
  62  *  is_command_allowed_in_ps - tests if a command is allowed in Power Save mode
  63  *
  64  *  @cmd:       the command ID
  65  *
  66  *  returns:    1 if allowed, 0 if not allowed
  67  */
  68 static u8 is_command_allowed_in_ps(u16 cmd)
  69 {
  70         switch (cmd) {
  71         case CMD_802_11_RSSI:
  72                 return 1;
  73         case CMD_802_11_HOST_SLEEP_CFG:
  74                 return 1;
  75         default:
  76                 break;
  77         }
  78         return 0;
  79 }
  80 
  81 /**
  82  *  lbs_update_hw_spec - Updates the hardware details like MAC address
  83  *  and regulatory region
  84  *
  85  *  @priv:      A pointer to &struct lbs_private structure
  86  *
  87  *  returns:    0 on success, error on failure
  88  */
  89 int lbs_update_hw_spec(struct lbs_private *priv)
  90 {
  91         struct cmd_ds_get_hw_spec cmd;
  92         int ret = -1;
  93         u32 i;
  94 
  95         memset(&cmd, 0, sizeof(cmd));
  96         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
  97         memcpy(cmd.permanentaddr, priv->current_addr, ETH_ALEN);
  98         ret = lbs_cmd_with_response(priv, CMD_GET_HW_SPEC, &cmd);
  99         if (ret)
 100                 goto out;
 101 
 102         priv->fwcapinfo = le32_to_cpu(cmd.fwcapinfo);
 103 
 104         /* The firmware release is in an interesting format: the patch
 105          * level is in the most significant nibble ... so fix that: */
 106         priv->fwrelease = le32_to_cpu(cmd.fwrelease);
 107         priv->fwrelease = (priv->fwrelease << 8) |
 108                 (priv->fwrelease >> 24 & 0xff);
 109 
 110         /* Some firmware capabilities:
 111          * CF card    firmware 5.0.16p0:   cap 0x00000303
 112          * USB dongle firmware 5.110.17p2: cap 0x00000303
 113          */
 114         netdev_info(priv->dev, "%pM, fw %u.%u.%up%u, cap 0x%08x\n",
 115                 cmd.permanentaddr,
 116                 priv->fwrelease >> 24 & 0xff,
 117                 priv->fwrelease >> 16 & 0xff,
 118                 priv->fwrelease >>  8 & 0xff,
 119                 priv->fwrelease       & 0xff,
 120                 priv->fwcapinfo);
 121         lbs_deb_cmd("GET_HW_SPEC: hardware interface 0x%x, hardware spec 0x%04x\n",
 122                     cmd.hwifversion, cmd.version);
 123 
 124         /* Clamp region code to 8-bit since FW spec indicates that it should
 125          * only ever be 8-bit, even though the field size is 16-bit.  Some firmware
 126          * returns non-zero high 8 bits here.
 127          *
 128          * Firmware version 4.0.102 used in CF8381 has region code shifted.  We
 129          * need to check for this problem and handle it properly.
 130          */
 131         if (MRVL_FW_MAJOR_REV(priv->fwrelease) == MRVL_FW_V4)
 132                 priv->regioncode = (le16_to_cpu(cmd.regioncode) >> 8) & 0xFF;
 133         else
 134                 priv->regioncode = le16_to_cpu(cmd.regioncode) & 0xFF;
 135 
 136         for (i = 0; i < MRVDRV_MAX_REGION_CODE; i++) {
 137                 /* use the region code to search for the index */
 138                 if (priv->regioncode == lbs_region_code_to_index[i])
 139                         break;
 140         }
 141 
 142         /* if it's unidentified region code, use the default (USA) */
 143         if (i >= MRVDRV_MAX_REGION_CODE) {
 144                 priv->regioncode = 0x10;
 145                 netdev_info(priv->dev,
 146                             "unidentified region code; using the default (USA)\n");
 147         }
 148 
 149         if (priv->current_addr[0] == 0xff)
 150                 memmove(priv->current_addr, cmd.permanentaddr, ETH_ALEN);
 151 
 152         if (!priv->copied_hwaddr) {
 153                 memcpy(priv->dev->dev_addr, priv->current_addr, ETH_ALEN);
 154                 if (priv->mesh_dev)
 155                         memcpy(priv->mesh_dev->dev_addr,
 156                                 priv->current_addr, ETH_ALEN);
 157                 priv->copied_hwaddr = 1;
 158         }
 159 
 160 out:
 161         return ret;
 162 }
 163 
 164 static int lbs_ret_host_sleep_cfg(struct lbs_private *priv, unsigned long dummy,
 165                         struct cmd_header *resp)
 166 {
 167         if (priv->is_host_sleep_activated) {
 168                 priv->is_host_sleep_configured = 0;
 169                 if (priv->psstate == PS_STATE_FULL_POWER) {
 170                         priv->is_host_sleep_activated = 0;
 171                         wake_up_interruptible(&priv->host_sleep_q);
 172                 }
 173         } else {
 174                 priv->is_host_sleep_configured = 1;
 175         }
 176 
 177         return 0;
 178 }
 179 
 180 int lbs_host_sleep_cfg(struct lbs_private *priv, uint32_t criteria,
 181                 struct wol_config *p_wol_config)
 182 {
 183         struct cmd_ds_host_sleep cmd_config;
 184         int ret;
 185 
 186         /*
 187          * Certain firmware versions do not support EHS_REMOVE_WAKEUP command
 188          * and the card will return a failure.  Since we need to be
 189          * able to reset the mask, in those cases we set a 0 mask instead.
 190          */
 191         if (criteria == EHS_REMOVE_WAKEUP && !priv->ehs_remove_supported)
 192                 criteria = 0;
 193 
 194         cmd_config.hdr.size = cpu_to_le16(sizeof(cmd_config));
 195         cmd_config.criteria = cpu_to_le32(criteria);
 196         cmd_config.gpio = priv->wol_gpio;
 197         cmd_config.gap = priv->wol_gap;
 198 
 199         if (p_wol_config != NULL)
 200                 memcpy((uint8_t *)&cmd_config.wol_conf, (uint8_t *)p_wol_config,
 201                                 sizeof(struct wol_config));
 202         else
 203                 cmd_config.wol_conf.action = CMD_ACT_ACTION_NONE;
 204 
 205         ret = __lbs_cmd(priv, CMD_802_11_HOST_SLEEP_CFG, &cmd_config.hdr,
 206                         le16_to_cpu(cmd_config.hdr.size),
 207                         lbs_ret_host_sleep_cfg, 0);
 208         if (!ret) {
 209                 if (p_wol_config)
 210                         memcpy((uint8_t *) p_wol_config,
 211                                         (uint8_t *)&cmd_config.wol_conf,
 212                                         sizeof(struct wol_config));
 213         } else {
 214                 netdev_info(priv->dev, "HOST_SLEEP_CFG failed %d\n", ret);
 215         }
 216 
 217         return ret;
 218 }
 219 EXPORT_SYMBOL_GPL(lbs_host_sleep_cfg);
 220 
 221 /**
 222  *  lbs_set_ps_mode - Sets the Power Save mode
 223  *
 224  *  @priv:      A pointer to &struct lbs_private structure
 225  *  @cmd_action: The Power Save operation (PS_MODE_ACTION_ENTER_PS or
 226  *                         PS_MODE_ACTION_EXIT_PS)
 227  *  @block:     Whether to block on a response or not
 228  *
 229  *  returns:    0 on success, error on failure
 230  */
 231 int lbs_set_ps_mode(struct lbs_private *priv, u16 cmd_action, bool block)
 232 {
 233         struct cmd_ds_802_11_ps_mode cmd;
 234         int ret = 0;
 235 
 236         memset(&cmd, 0, sizeof(cmd));
 237         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 238         cmd.action = cpu_to_le16(cmd_action);
 239 
 240         if (cmd_action == PS_MODE_ACTION_ENTER_PS) {
 241                 lbs_deb_cmd("PS_MODE: action ENTER_PS\n");
 242                 cmd.multipledtim = cpu_to_le16(1);  /* Default DTIM multiple */
 243         } else if (cmd_action == PS_MODE_ACTION_EXIT_PS) {
 244                 lbs_deb_cmd("PS_MODE: action EXIT_PS\n");
 245         } else {
 246                 /* We don't handle CONFIRM_SLEEP here because it needs to
 247                  * be fastpathed to the firmware.
 248                  */
 249                 lbs_deb_cmd("PS_MODE: unknown action 0x%X\n", cmd_action);
 250                 ret = -EOPNOTSUPP;
 251                 goto out;
 252         }
 253 
 254         if (block)
 255                 ret = lbs_cmd_with_response(priv, CMD_802_11_PS_MODE, &cmd);
 256         else
 257                 lbs_cmd_async(priv, CMD_802_11_PS_MODE, &cmd.hdr, sizeof (cmd));
 258 
 259 out:
 260         return ret;
 261 }
 262 
 263 int lbs_cmd_802_11_sleep_params(struct lbs_private *priv, uint16_t cmd_action,
 264                                 struct sleep_params *sp)
 265 {
 266         struct cmd_ds_802_11_sleep_params cmd;
 267         int ret;
 268 
 269         if (cmd_action == CMD_ACT_GET) {
 270                 memset(&cmd, 0, sizeof(cmd));
 271         } else {
 272                 cmd.error = cpu_to_le16(sp->sp_error);
 273                 cmd.offset = cpu_to_le16(sp->sp_offset);
 274                 cmd.stabletime = cpu_to_le16(sp->sp_stabletime);
 275                 cmd.calcontrol = sp->sp_calcontrol;
 276                 cmd.externalsleepclk = sp->sp_extsleepclk;
 277                 cmd.reserved = cpu_to_le16(sp->sp_reserved);
 278         }
 279         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 280         cmd.action = cpu_to_le16(cmd_action);
 281 
 282         ret = lbs_cmd_with_response(priv, CMD_802_11_SLEEP_PARAMS, &cmd);
 283 
 284         if (!ret) {
 285                 lbs_deb_cmd("error 0x%x, offset 0x%x, stabletime 0x%x, "
 286                             "calcontrol 0x%x extsleepclk 0x%x\n",
 287                             le16_to_cpu(cmd.error), le16_to_cpu(cmd.offset),
 288                             le16_to_cpu(cmd.stabletime), cmd.calcontrol,
 289                             cmd.externalsleepclk);
 290 
 291                 sp->sp_error = le16_to_cpu(cmd.error);
 292                 sp->sp_offset = le16_to_cpu(cmd.offset);
 293                 sp->sp_stabletime = le16_to_cpu(cmd.stabletime);
 294                 sp->sp_calcontrol = cmd.calcontrol;
 295                 sp->sp_extsleepclk = cmd.externalsleepclk;
 296                 sp->sp_reserved = le16_to_cpu(cmd.reserved);
 297         }
 298 
 299         return ret;
 300 }
 301 
 302 static int lbs_wait_for_ds_awake(struct lbs_private *priv)
 303 {
 304         int ret = 0;
 305 
 306         if (priv->is_deep_sleep) {
 307                 if (!wait_event_interruptible_timeout(priv->ds_awake_q,
 308                                         !priv->is_deep_sleep, (10 * HZ))) {
 309                         netdev_err(priv->dev, "ds_awake_q: timer expired\n");
 310                         ret = -1;
 311                 }
 312         }
 313 
 314         return ret;
 315 }
 316 
 317 int lbs_set_deep_sleep(struct lbs_private *priv, int deep_sleep)
 318 {
 319         int ret =  0;
 320 
 321         if (deep_sleep) {
 322                 if (priv->is_deep_sleep != 1) {
 323                         lbs_deb_cmd("deep sleep: sleep\n");
 324                         BUG_ON(!priv->enter_deep_sleep);
 325                         ret = priv->enter_deep_sleep(priv);
 326                         if (!ret) {
 327                                 netif_stop_queue(priv->dev);
 328                                 netif_carrier_off(priv->dev);
 329                         }
 330                 } else {
 331                         netdev_err(priv->dev, "deep sleep: already enabled\n");
 332                 }
 333         } else {
 334                 if (priv->is_deep_sleep) {
 335                         lbs_deb_cmd("deep sleep: wakeup\n");
 336                         BUG_ON(!priv->exit_deep_sleep);
 337                         ret = priv->exit_deep_sleep(priv);
 338                         if (!ret) {
 339                                 ret = lbs_wait_for_ds_awake(priv);
 340                                 if (ret)
 341                                         netdev_err(priv->dev,
 342                                                    "deep sleep: wakeup failed\n");
 343                         }
 344                 }
 345         }
 346 
 347         return ret;
 348 }
 349 
 350 static int lbs_ret_host_sleep_activate(struct lbs_private *priv,
 351                 unsigned long dummy,
 352                 struct cmd_header *cmd)
 353 {
 354         priv->is_host_sleep_activated = 1;
 355         wake_up_interruptible(&priv->host_sleep_q);
 356 
 357         return 0;
 358 }
 359 
 360 int lbs_set_host_sleep(struct lbs_private *priv, int host_sleep)
 361 {
 362         struct cmd_header cmd;
 363         int ret = 0;
 364         uint32_t criteria = EHS_REMOVE_WAKEUP;
 365 
 366         if (host_sleep) {
 367                 if (priv->is_host_sleep_activated != 1) {
 368                         memset(&cmd, 0, sizeof(cmd));
 369                         ret = lbs_host_sleep_cfg(priv, priv->wol_criteria,
 370                                         (struct wol_config *)NULL);
 371                         if (ret) {
 372                                 netdev_info(priv->dev,
 373                                             "Host sleep configuration failed: %d\n",
 374                                             ret);
 375                                 return ret;
 376                         }
 377                         if (priv->psstate == PS_STATE_FULL_POWER) {
 378                                 ret = __lbs_cmd(priv,
 379                                                 CMD_802_11_HOST_SLEEP_ACTIVATE,
 380                                                 &cmd,
 381                                                 sizeof(cmd),
 382                                                 lbs_ret_host_sleep_activate, 0);
 383                                 if (ret)
 384                                         netdev_info(priv->dev,
 385                                                     "HOST_SLEEP_ACTIVATE failed: %d\n",
 386                                                     ret);
 387                         }
 388 
 389                         if (!wait_event_interruptible_timeout(
 390                                                 priv->host_sleep_q,
 391                                                 priv->is_host_sleep_activated,
 392                                                 (10 * HZ))) {
 393                                 netdev_err(priv->dev,
 394                                            "host_sleep_q: timer expired\n");
 395                                 ret = -1;
 396                         }
 397                 } else {
 398                         netdev_err(priv->dev, "host sleep: already enabled\n");
 399                 }
 400         } else {
 401                 if (priv->is_host_sleep_activated)
 402                         ret = lbs_host_sleep_cfg(priv, criteria,
 403                                         (struct wol_config *)NULL);
 404         }
 405 
 406         return ret;
 407 }
 408 
 409 /**
 410  *  lbs_set_snmp_mib - Set an SNMP MIB value
 411  *
 412  *  @priv:      A pointer to &struct lbs_private structure
 413  *  @oid:       The OID to set in the firmware
 414  *  @val:       Value to set the OID to
 415  *
 416  *  returns:            0 on success, error on failure
 417  */
 418 int lbs_set_snmp_mib(struct lbs_private *priv, u32 oid, u16 val)
 419 {
 420         struct cmd_ds_802_11_snmp_mib cmd;
 421         int ret;
 422 
 423         memset(&cmd, 0, sizeof (cmd));
 424         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 425         cmd.action = cpu_to_le16(CMD_ACT_SET);
 426         cmd.oid = cpu_to_le16((u16) oid);
 427 
 428         switch (oid) {
 429         case SNMP_MIB_OID_BSS_TYPE:
 430                 cmd.bufsize = cpu_to_le16(sizeof(u8));
 431                 cmd.value[0] = val;
 432                 break;
 433         case SNMP_MIB_OID_11D_ENABLE:
 434         case SNMP_MIB_OID_FRAG_THRESHOLD:
 435         case SNMP_MIB_OID_RTS_THRESHOLD:
 436         case SNMP_MIB_OID_SHORT_RETRY_LIMIT:
 437         case SNMP_MIB_OID_LONG_RETRY_LIMIT:
 438                 cmd.bufsize = cpu_to_le16(sizeof(u16));
 439                 *((__le16 *)(&cmd.value)) = cpu_to_le16(val);
 440                 break;
 441         default:
 442                 lbs_deb_cmd("SNMP_CMD: (set) unhandled OID 0x%x\n", oid);
 443                 ret = -EINVAL;
 444                 goto out;
 445         }
 446 
 447         lbs_deb_cmd("SNMP_CMD: (set) oid 0x%x, oid size 0x%x, value 0x%x\n",
 448                     le16_to_cpu(cmd.oid), le16_to_cpu(cmd.bufsize), val);
 449 
 450         ret = lbs_cmd_with_response(priv, CMD_802_11_SNMP_MIB, &cmd);
 451 
 452 out:
 453         return ret;
 454 }
 455 
 456 /**
 457  *  lbs_get_snmp_mib - Get an SNMP MIB value
 458  *
 459  *  @priv:      A pointer to &struct lbs_private structure
 460  *  @oid:       The OID to retrieve from the firmware
 461  *  @out_val:   Location for the returned value
 462  *
 463  *  returns:    0 on success, error on failure
 464  */
 465 int lbs_get_snmp_mib(struct lbs_private *priv, u32 oid, u16 *out_val)
 466 {
 467         struct cmd_ds_802_11_snmp_mib cmd;
 468         int ret;
 469 
 470         memset(&cmd, 0, sizeof (cmd));
 471         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 472         cmd.action = cpu_to_le16(CMD_ACT_GET);
 473         cmd.oid = cpu_to_le16(oid);
 474 
 475         ret = lbs_cmd_with_response(priv, CMD_802_11_SNMP_MIB, &cmd);
 476         if (ret)
 477                 goto out;
 478 
 479         switch (le16_to_cpu(cmd.bufsize)) {
 480         case sizeof(u8):
 481                 *out_val = cmd.value[0];
 482                 break;
 483         case sizeof(u16):
 484                 *out_val = le16_to_cpu(*((__le16 *)(&cmd.value)));
 485                 break;
 486         default:
 487                 lbs_deb_cmd("SNMP_CMD: (get) unhandled OID 0x%x size %d\n",
 488                             oid, le16_to_cpu(cmd.bufsize));
 489                 break;
 490         }
 491 
 492 out:
 493         return ret;
 494 }
 495 
 496 /**
 497  *  lbs_get_tx_power - Get the min, max, and current TX power
 498  *
 499  *  @priv:      A pointer to &struct lbs_private structure
 500  *  @curlevel:  Current power level in dBm
 501  *  @minlevel:  Minimum supported power level in dBm (optional)
 502  *  @maxlevel:  Maximum supported power level in dBm (optional)
 503  *
 504  *  returns:    0 on success, error on failure
 505  */
 506 int lbs_get_tx_power(struct lbs_private *priv, s16 *curlevel, s16 *minlevel,
 507                      s16 *maxlevel)
 508 {
 509         struct cmd_ds_802_11_rf_tx_power cmd;
 510         int ret;
 511 
 512         memset(&cmd, 0, sizeof(cmd));
 513         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 514         cmd.action = cpu_to_le16(CMD_ACT_GET);
 515 
 516         ret = lbs_cmd_with_response(priv, CMD_802_11_RF_TX_POWER, &cmd);
 517         if (ret == 0) {
 518                 *curlevel = le16_to_cpu(cmd.curlevel);
 519                 if (minlevel)
 520                         *minlevel = cmd.minlevel;
 521                 if (maxlevel)
 522                         *maxlevel = cmd.maxlevel;
 523         }
 524 
 525         return ret;
 526 }
 527 
 528 /**
 529  *  lbs_set_tx_power - Set the TX power
 530  *
 531  *  @priv:      A pointer to &struct lbs_private structure
 532  *  @dbm:       The desired power level in dBm
 533  *
 534  *  returns:            0 on success, error on failure
 535  */
 536 int lbs_set_tx_power(struct lbs_private *priv, s16 dbm)
 537 {
 538         struct cmd_ds_802_11_rf_tx_power cmd;
 539         int ret;
 540 
 541         memset(&cmd, 0, sizeof(cmd));
 542         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 543         cmd.action = cpu_to_le16(CMD_ACT_SET);
 544         cmd.curlevel = cpu_to_le16(dbm);
 545 
 546         lbs_deb_cmd("SET_RF_TX_POWER: %d dBm\n", dbm);
 547 
 548         ret = lbs_cmd_with_response(priv, CMD_802_11_RF_TX_POWER, &cmd);
 549 
 550         return ret;
 551 }
 552 
 553 /**
 554  *  lbs_set_monitor_mode - Enable or disable monitor mode
 555  *  (only implemented on OLPC usb8388 FW)
 556  *
 557  *  @priv:      A pointer to &struct lbs_private structure
 558  *  @enable:    1 to enable monitor mode, 0 to disable
 559  *
 560  *  returns:    0 on success, error on failure
 561  */
 562 int lbs_set_monitor_mode(struct lbs_private *priv, int enable)
 563 {
 564         struct cmd_ds_802_11_monitor_mode cmd;
 565         int ret;
 566 
 567         memset(&cmd, 0, sizeof(cmd));
 568         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 569         cmd.action = cpu_to_le16(CMD_ACT_SET);
 570         if (enable)
 571                 cmd.mode = cpu_to_le16(0x1);
 572 
 573         lbs_deb_cmd("SET_MONITOR_MODE: %d\n", enable);
 574 
 575         ret = lbs_cmd_with_response(priv, CMD_802_11_MONITOR_MODE, &cmd);
 576         if (ret == 0) {
 577                 priv->dev->type = enable ? ARPHRD_IEEE80211_RADIOTAP :
 578                                                 ARPHRD_ETHER;
 579         }
 580 
 581         return ret;
 582 }
 583 
 584 /**
 585  *  lbs_get_channel - Get the radio channel
 586  *
 587  *  @priv:      A pointer to &struct lbs_private structure
 588  *
 589  *  returns:    The channel on success, error on failure
 590  */
 591 static int lbs_get_channel(struct lbs_private *priv)
 592 {
 593         struct cmd_ds_802_11_rf_channel cmd;
 594         int ret = 0;
 595 
 596         memset(&cmd, 0, sizeof(cmd));
 597         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 598         cmd.action = cpu_to_le16(CMD_OPT_802_11_RF_CHANNEL_GET);
 599 
 600         ret = lbs_cmd_with_response(priv, CMD_802_11_RF_CHANNEL, &cmd);
 601         if (ret)
 602                 goto out;
 603 
 604         ret = le16_to_cpu(cmd.channel);
 605         lbs_deb_cmd("current radio channel is %d\n", ret);
 606 
 607 out:
 608         return ret;
 609 }
 610 
 611 int lbs_update_channel(struct lbs_private *priv)
 612 {
 613         int ret;
 614 
 615         /* the channel in f/w could be out of sync; get the current channel */
 616         ret = lbs_get_channel(priv);
 617         if (ret > 0) {
 618                 priv->channel = ret;
 619                 ret = 0;
 620         }
 621 
 622         return ret;
 623 }
 624 
 625 /**
 626  *  lbs_set_channel - Set the radio channel
 627  *
 628  *  @priv:      A pointer to &struct lbs_private structure
 629  *  @channel:   The desired channel, or 0 to clear a locked channel
 630  *
 631  *  returns:    0 on success, error on failure
 632  */
 633 int lbs_set_channel(struct lbs_private *priv, u8 channel)
 634 {
 635         struct cmd_ds_802_11_rf_channel cmd;
 636 #ifdef DEBUG
 637         u8 old_channel = priv->channel;
 638 #endif
 639         int ret = 0;
 640 
 641         memset(&cmd, 0, sizeof(cmd));
 642         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 643         cmd.action = cpu_to_le16(CMD_OPT_802_11_RF_CHANNEL_SET);
 644         cmd.channel = cpu_to_le16(channel);
 645 
 646         ret = lbs_cmd_with_response(priv, CMD_802_11_RF_CHANNEL, &cmd);
 647         if (ret)
 648                 goto out;
 649 
 650         priv->channel = (uint8_t) le16_to_cpu(cmd.channel);
 651         lbs_deb_cmd("channel switch from %d to %d\n", old_channel,
 652                 priv->channel);
 653 
 654 out:
 655         return ret;
 656 }
 657 
 658 /**
 659  * lbs_get_rssi - Get current RSSI and noise floor
 660  *
 661  * @priv:       A pointer to &struct lbs_private structure
 662  * @rssi:       On successful return, signal level in mBm
 663  * @nf:         On successful return, Noise floor
 664  *
 665  * returns:     The channel on success, error on failure
 666  */
 667 int lbs_get_rssi(struct lbs_private *priv, s8 *rssi, s8 *nf)
 668 {
 669         struct cmd_ds_802_11_rssi cmd;
 670         int ret = 0;
 671 
 672         BUG_ON(rssi == NULL);
 673         BUG_ON(nf == NULL);
 674 
 675         memset(&cmd, 0, sizeof(cmd));
 676         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 677         /* Average SNR over last 8 beacons */
 678         cmd.n_or_snr = cpu_to_le16(8);
 679 
 680         ret = lbs_cmd_with_response(priv, CMD_802_11_RSSI, &cmd);
 681         if (ret == 0) {
 682                 *nf = CAL_NF(le16_to_cpu(cmd.nf));
 683                 *rssi = CAL_RSSI(le16_to_cpu(cmd.n_or_snr), le16_to_cpu(cmd.nf));
 684         }
 685 
 686         return ret;
 687 }
 688 
 689 /**
 690  *  lbs_set_11d_domain_info - Send regulatory and 802.11d domain information
 691  *  to the firmware
 692  *
 693  *  @priv:      pointer to &struct lbs_private
 694  *
 695  *  returns:    0 on success, error code on failure
 696 */
 697 int lbs_set_11d_domain_info(struct lbs_private *priv)
 698 {
 699         struct wiphy *wiphy = priv->wdev->wiphy;
 700         struct ieee80211_supported_band **bands = wiphy->bands;
 701         struct cmd_ds_802_11d_domain_info cmd;
 702         struct mrvl_ie_domain_param_set *domain = &cmd.domain;
 703         struct ieee80211_country_ie_triplet *t;
 704         enum nl80211_band band;
 705         struct ieee80211_channel *ch;
 706         u8 num_triplet = 0;
 707         u8 num_parsed_chan = 0;
 708         u8 first_channel = 0, next_chan = 0, max_pwr = 0;
 709         u8 i, flag = 0;
 710         size_t triplet_size;
 711         int ret = 0;
 712 
 713         if (!priv->country_code[0])
 714                 goto out;
 715 
 716         memset(&cmd, 0, sizeof(cmd));
 717         cmd.action = cpu_to_le16(CMD_ACT_SET);
 718 
 719         lbs_deb_11d("Setting country code '%c%c'\n",
 720                     priv->country_code[0], priv->country_code[1]);
 721 
 722         domain->header.type = cpu_to_le16(TLV_TYPE_DOMAIN);
 723 
 724         /* Set country code */
 725         domain->country_code[0] = priv->country_code[0];
 726         domain->country_code[1] = priv->country_code[1];
 727         domain->country_code[2] = ' ';
 728 
 729         /* Now set up the channel triplets; firmware is somewhat picky here
 730          * and doesn't validate channel numbers and spans; hence it would
 731          * interpret a triplet of (36, 4, 20) as channels 36, 37, 38, 39.  Since
 732          * the last 3 aren't valid channels, the driver is responsible for
 733          * splitting that up into 4 triplet pairs of (36, 1, 20) + (40, 1, 20)
 734          * etc.
 735          */
 736         for (band = 0;
 737              (band < NUM_NL80211_BANDS) && (num_triplet < MAX_11D_TRIPLETS);
 738              band++) {
 739 
 740                 if (!bands[band])
 741                         continue;
 742 
 743                 for (i = 0;
 744                      (i < bands[band]->n_channels) && (num_triplet < MAX_11D_TRIPLETS);
 745                      i++) {
 746                         ch = &bands[band]->channels[i];
 747                         if (ch->flags & IEEE80211_CHAN_DISABLED)
 748                                 continue;
 749 
 750                         if (!flag) {
 751                                 flag = 1;
 752                                 next_chan = first_channel = (u32) ch->hw_value;
 753                                 max_pwr = ch->max_power;
 754                                 num_parsed_chan = 1;
 755                                 continue;
 756                         }
 757 
 758                         if ((ch->hw_value == next_chan + 1) &&
 759                                         (ch->max_power == max_pwr)) {
 760                                 /* Consolidate adjacent channels */
 761                                 next_chan++;
 762                                 num_parsed_chan++;
 763                         } else {
 764                                 /* Add this triplet */
 765                                 lbs_deb_11d("11D triplet (%d, %d, %d)\n",
 766                                         first_channel, num_parsed_chan,
 767                                         max_pwr);
 768                                 t = &domain->triplet[num_triplet];
 769                                 t->chans.first_channel = first_channel;
 770                                 t->chans.num_channels = num_parsed_chan;
 771                                 t->chans.max_power = max_pwr;
 772                                 num_triplet++;
 773                                 flag = 0;
 774                         }
 775                 }
 776 
 777                 if (flag) {
 778                         /* Add last triplet */
 779                         lbs_deb_11d("11D triplet (%d, %d, %d)\n", first_channel,
 780                                 num_parsed_chan, max_pwr);
 781                         t = &domain->triplet[num_triplet];
 782                         t->chans.first_channel = first_channel;
 783                         t->chans.num_channels = num_parsed_chan;
 784                         t->chans.max_power = max_pwr;
 785                         num_triplet++;
 786                 }
 787         }
 788 
 789         lbs_deb_11d("# triplets %d\n", num_triplet);
 790 
 791         /* Set command header sizes */
 792         triplet_size = num_triplet * sizeof(struct ieee80211_country_ie_triplet);
 793         domain->header.len = cpu_to_le16(sizeof(domain->country_code) +
 794                                         triplet_size);
 795 
 796         lbs_deb_hex(LBS_DEB_11D, "802.11D domain param set",
 797                         (u8 *) &cmd.domain.country_code,
 798                         le16_to_cpu(domain->header.len));
 799 
 800         cmd.hdr.size = cpu_to_le16(sizeof(cmd.hdr) +
 801                                    sizeof(cmd.action) +
 802                                    sizeof(cmd.domain.header) +
 803                                    sizeof(cmd.domain.country_code) +
 804                                    triplet_size);
 805 
 806         ret = lbs_cmd_with_response(priv, CMD_802_11D_DOMAIN_INFO, &cmd);
 807 
 808 out:
 809         return ret;
 810 }
 811 
 812 /**
 813  *  lbs_get_reg - Read a MAC, Baseband, or RF register
 814  *
 815  *  @priv:      pointer to &struct lbs_private
 816  *  @reg:       register command, one of CMD_MAC_REG_ACCESS,
 817  *              CMD_BBP_REG_ACCESS, or CMD_RF_REG_ACCESS
 818  *  @offset:    byte offset of the register to get
 819  *  @value:     on success, the value of the register at 'offset'
 820  *
 821  *  returns:    0 on success, error code on failure
 822 */
 823 int lbs_get_reg(struct lbs_private *priv, u16 reg, u16 offset, u32 *value)
 824 {
 825         struct cmd_ds_reg_access cmd;
 826         int ret = 0;
 827 
 828         BUG_ON(value == NULL);
 829 
 830         memset(&cmd, 0, sizeof(cmd));
 831         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 832         cmd.action = cpu_to_le16(CMD_ACT_GET);
 833         cmd.offset = cpu_to_le16(offset);
 834 
 835         if (reg != CMD_MAC_REG_ACCESS &&
 836             reg != CMD_BBP_REG_ACCESS &&
 837             reg != CMD_RF_REG_ACCESS) {
 838                 ret = -EINVAL;
 839                 goto out;
 840         }
 841 
 842         ret = lbs_cmd_with_response(priv, reg, &cmd);
 843         if (!ret) {
 844                 if (reg == CMD_BBP_REG_ACCESS || reg == CMD_RF_REG_ACCESS)
 845                         *value = cmd.value.bbp_rf;
 846                 else if (reg == CMD_MAC_REG_ACCESS)
 847                         *value = le32_to_cpu(cmd.value.mac);
 848         }
 849 
 850 out:
 851         return ret;
 852 }
 853 
 854 /**
 855  *  lbs_set_reg - Write a MAC, Baseband, or RF register
 856  *
 857  *  @priv:      pointer to &struct lbs_private
 858  *  @reg:       register command, one of CMD_MAC_REG_ACCESS,
 859  *              CMD_BBP_REG_ACCESS, or CMD_RF_REG_ACCESS
 860  *  @offset:    byte offset of the register to set
 861  *  @value:     the value to write to the register at 'offset'
 862  *
 863  *  returns:    0 on success, error code on failure
 864 */
 865 int lbs_set_reg(struct lbs_private *priv, u16 reg, u16 offset, u32 value)
 866 {
 867         struct cmd_ds_reg_access cmd;
 868         int ret = 0;
 869 
 870         memset(&cmd, 0, sizeof(cmd));
 871         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 872         cmd.action = cpu_to_le16(CMD_ACT_SET);
 873         cmd.offset = cpu_to_le16(offset);
 874 
 875         if (reg == CMD_BBP_REG_ACCESS || reg == CMD_RF_REG_ACCESS)
 876                 cmd.value.bbp_rf = (u8) (value & 0xFF);
 877         else if (reg == CMD_MAC_REG_ACCESS)
 878                 cmd.value.mac = cpu_to_le32(value);
 879         else {
 880                 ret = -EINVAL;
 881                 goto out;
 882         }
 883 
 884         ret = lbs_cmd_with_response(priv, reg, &cmd);
 885 
 886 out:
 887         return ret;
 888 }
 889 
 890 static void lbs_queue_cmd(struct lbs_private *priv,
 891                           struct cmd_ctrl_node *cmdnode)
 892 {
 893         unsigned long flags;
 894         int addtail = 1;
 895 
 896         if (!cmdnode) {
 897                 lbs_deb_host("QUEUE_CMD: cmdnode is NULL\n");
 898                 return;
 899         }
 900         if (!cmdnode->cmdbuf->size) {
 901                 lbs_deb_host("DNLD_CMD: cmd size is zero\n");
 902                 return;
 903         }
 904         cmdnode->result = 0;
 905 
 906         /* Exit_PS command needs to be queued in the header always. */
 907         if (le16_to_cpu(cmdnode->cmdbuf->command) == CMD_802_11_PS_MODE) {
 908                 struct cmd_ds_802_11_ps_mode *psm = (void *)cmdnode->cmdbuf;
 909 
 910                 if (psm->action == cpu_to_le16(PS_MODE_ACTION_EXIT_PS)) {
 911                         if (priv->psstate != PS_STATE_FULL_POWER)
 912                                 addtail = 0;
 913                 }
 914         }
 915 
 916         if (le16_to_cpu(cmdnode->cmdbuf->command) == CMD_802_11_WAKEUP_CONFIRM)
 917                 addtail = 0;
 918 
 919         spin_lock_irqsave(&priv->driver_lock, flags);
 920 
 921         if (addtail)
 922                 list_add_tail(&cmdnode->list, &priv->cmdpendingq);
 923         else
 924                 list_add(&cmdnode->list, &priv->cmdpendingq);
 925 
 926         spin_unlock_irqrestore(&priv->driver_lock, flags);
 927 
 928         lbs_deb_host("QUEUE_CMD: inserted command 0x%04x into cmdpendingq\n",
 929                      le16_to_cpu(cmdnode->cmdbuf->command));
 930 }
 931 
 932 static void lbs_submit_command(struct lbs_private *priv,
 933                                struct cmd_ctrl_node *cmdnode)
 934 {
 935         unsigned long flags;
 936         struct cmd_header *cmd;
 937         uint16_t cmdsize;
 938         uint16_t command;
 939         int timeo = 3 * HZ;
 940         int ret;
 941 
 942         cmd = cmdnode->cmdbuf;
 943 
 944         spin_lock_irqsave(&priv->driver_lock, flags);
 945         priv->seqnum++;
 946         cmd->seqnum = cpu_to_le16(priv->seqnum);
 947         priv->cur_cmd = cmdnode;
 948         spin_unlock_irqrestore(&priv->driver_lock, flags);
 949 
 950         cmdsize = le16_to_cpu(cmd->size);
 951         command = le16_to_cpu(cmd->command);
 952 
 953         /* These commands take longer */
 954         if (command == CMD_802_11_SCAN || command == CMD_802_11_ASSOCIATE)
 955                 timeo = 5 * HZ;
 956 
 957         lbs_deb_cmd("DNLD_CMD: command 0x%04x, seq %d, size %d\n",
 958                      command, le16_to_cpu(cmd->seqnum), cmdsize);
 959         lbs_deb_hex(LBS_DEB_CMD, "DNLD_CMD", (void *) cmdnode->cmdbuf, cmdsize);
 960 
 961         ret = priv->hw_host_to_card(priv, MVMS_CMD, (u8 *) cmd, cmdsize);
 962 
 963         if (ret) {
 964                 netdev_info(priv->dev, "DNLD_CMD: hw_host_to_card failed: %d\n",
 965                             ret);
 966                 /* Reset dnld state machine, report failure */
 967                 priv->dnld_sent = DNLD_RES_RECEIVED;
 968                 lbs_complete_command(priv, cmdnode, ret);
 969         }
 970 
 971         if (command == CMD_802_11_DEEP_SLEEP) {
 972                 if (priv->is_auto_deep_sleep_enabled) {
 973                         priv->wakeup_dev_required = 1;
 974                         priv->dnld_sent = 0;
 975                 }
 976                 priv->is_deep_sleep = 1;
 977                 lbs_complete_command(priv, cmdnode, 0);
 978         } else {
 979                 /* Setup the timer after transmit command */
 980                 mod_timer(&priv->command_timer, jiffies + timeo);
 981         }
 982 }
 983 
 984 /*
 985  *  This function inserts command node to cmdfreeq
 986  *  after cleans it. Requires priv->driver_lock held.
 987  */
 988 static void __lbs_cleanup_and_insert_cmd(struct lbs_private *priv,
 989                                          struct cmd_ctrl_node *cmdnode)
 990 {
 991         if (!cmdnode)
 992                 return;
 993 
 994         cmdnode->callback = NULL;
 995         cmdnode->callback_arg = 0;
 996 
 997         memset(cmdnode->cmdbuf, 0, LBS_CMD_BUFFER_SIZE);
 998 
 999         list_add_tail(&cmdnode->list, &priv->cmdfreeq);
1000 }
1001 
1002 static void lbs_cleanup_and_insert_cmd(struct lbs_private *priv,
1003         struct cmd_ctrl_node *ptempcmd)
1004 {
1005         unsigned long flags;
1006 
1007         spin_lock_irqsave(&priv->driver_lock, flags);
1008         __lbs_cleanup_and_insert_cmd(priv, ptempcmd);
1009         spin_unlock_irqrestore(&priv->driver_lock, flags);
1010 }
1011 
1012 void __lbs_complete_command(struct lbs_private *priv, struct cmd_ctrl_node *cmd,
1013                             int result)
1014 {
1015         /*
1016          * Normally, commands are removed from cmdpendingq before being
1017          * submitted. However, we can arrive here on alternative codepaths
1018          * where the command is still pending. Make sure the command really
1019          * isn't part of a list at this point.
1020          */
1021         list_del_init(&cmd->list);
1022 
1023         cmd->result = result;
1024         cmd->cmdwaitqwoken = 1;
1025         wake_up(&cmd->cmdwait_q);
1026 
1027         if (!cmd->callback || cmd->callback == lbs_cmd_async_callback)
1028                 __lbs_cleanup_and_insert_cmd(priv, cmd);
1029         priv->cur_cmd = NULL;
1030         wake_up(&priv->waitq);
1031 }
1032 
1033 void lbs_complete_command(struct lbs_private *priv, struct cmd_ctrl_node *cmd,
1034                           int result)
1035 {
1036         unsigned long flags;
1037         spin_lock_irqsave(&priv->driver_lock, flags);
1038         __lbs_complete_command(priv, cmd, result);
1039         spin_unlock_irqrestore(&priv->driver_lock, flags);
1040 }
1041 
1042 int lbs_set_radio(struct lbs_private *priv, u8 preamble, u8 radio_on)
1043 {
1044         struct cmd_ds_802_11_radio_control cmd;
1045         int ret = -EINVAL;
1046 
1047         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
1048         cmd.action = cpu_to_le16(CMD_ACT_SET);
1049         cmd.control = 0;
1050 
1051         /* Only v8 and below support setting the preamble */
1052         if (priv->fwrelease < 0x09000000) {
1053                 switch (preamble) {
1054                 case RADIO_PREAMBLE_SHORT:
1055                 case RADIO_PREAMBLE_AUTO:
1056                 case RADIO_PREAMBLE_LONG:
1057                         cmd.control = cpu_to_le16(preamble);
1058                         break;
1059                 default:
1060                         goto out;
1061                 }
1062         }
1063 
1064         if (radio_on)
1065                 cmd.control |= cpu_to_le16(0x1);
1066         else {
1067                 cmd.control &= cpu_to_le16(~0x1);
1068                 priv->txpower_cur = 0;
1069         }
1070 
1071         lbs_deb_cmd("RADIO_CONTROL: radio %s, preamble %d\n",
1072                     radio_on ? "ON" : "OFF", preamble);
1073 
1074         priv->radio_on = radio_on;
1075 
1076         ret = lbs_cmd_with_response(priv, CMD_802_11_RADIO_CONTROL, &cmd);
1077 
1078 out:
1079         return ret;
1080 }
1081 
1082 void lbs_set_mac_control(struct lbs_private *priv)
1083 {
1084         struct cmd_ds_mac_control cmd;
1085 
1086         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
1087         cmd.action = cpu_to_le16(priv->mac_control);
1088         cmd.reserved = 0;
1089 
1090         lbs_cmd_async(priv, CMD_MAC_CONTROL, &cmd.hdr, sizeof(cmd));
1091 }
1092 
1093 int lbs_set_mac_control_sync(struct lbs_private *priv)
1094 {
1095         struct cmd_ds_mac_control cmd;
1096         int ret = 0;
1097 
1098         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
1099         cmd.action = cpu_to_le16(priv->mac_control);
1100         cmd.reserved = 0;
1101         ret = lbs_cmd_with_response(priv, CMD_MAC_CONTROL, &cmd);
1102 
1103         return ret;
1104 }
1105 
1106 /**
1107  *  lbs_allocate_cmd_buffer - allocates the command buffer and links
1108  *  it to command free queue
1109  *
1110  *  @priv:      A pointer to &struct lbs_private structure
1111  *
1112  *  returns:    0 for success or -1 on error
1113  */
1114 int lbs_allocate_cmd_buffer(struct lbs_private *priv)
1115 {
1116         int ret = 0;
1117         u32 bufsize;
1118         u32 i;
1119         struct cmd_ctrl_node *cmdarray;
1120 
1121         /* Allocate and initialize the command array */
1122         bufsize = sizeof(struct cmd_ctrl_node) * LBS_NUM_CMD_BUFFERS;
1123         if (!(cmdarray = kzalloc(bufsize, GFP_KERNEL))) {
1124                 lbs_deb_host("ALLOC_CMD_BUF: tempcmd_array is NULL\n");
1125                 ret = -1;
1126                 goto done;
1127         }
1128         priv->cmd_array = cmdarray;
1129 
1130         /* Allocate and initialize each command buffer in the command array */
1131         for (i = 0; i < LBS_NUM_CMD_BUFFERS; i++) {
1132                 cmdarray[i].cmdbuf = kzalloc(LBS_CMD_BUFFER_SIZE, GFP_KERNEL);
1133                 if (!cmdarray[i].cmdbuf) {
1134                         lbs_deb_host("ALLOC_CMD_BUF: ptempvirtualaddr is NULL\n");
1135                         ret = -1;
1136                         goto done;
1137                 }
1138         }
1139 
1140         for (i = 0; i < LBS_NUM_CMD_BUFFERS; i++) {
1141                 init_waitqueue_head(&cmdarray[i].cmdwait_q);
1142                 lbs_cleanup_and_insert_cmd(priv, &cmdarray[i]);
1143         }
1144         ret = 0;
1145 
1146 done:
1147         return ret;
1148 }
1149 
1150 /**
1151  *  lbs_free_cmd_buffer - free the command buffer
1152  *
1153  *  @priv:      A pointer to &struct lbs_private structure
1154  *
1155  *  returns:    0 for success
1156  */
1157 int lbs_free_cmd_buffer(struct lbs_private *priv)
1158 {
1159         struct cmd_ctrl_node *cmdarray;
1160         unsigned int i;
1161 
1162         /* need to check if cmd array is allocated or not */
1163         if (priv->cmd_array == NULL) {
1164                 lbs_deb_host("FREE_CMD_BUF: cmd_array is NULL\n");
1165                 goto done;
1166         }
1167 
1168         cmdarray = priv->cmd_array;
1169 
1170         /* Release shared memory buffers */
1171         for (i = 0; i < LBS_NUM_CMD_BUFFERS; i++) {
1172                 if (cmdarray[i].cmdbuf) {
1173                         kfree(cmdarray[i].cmdbuf);
1174                         cmdarray[i].cmdbuf = NULL;
1175                 }
1176         }
1177 
1178         /* Release cmd_ctrl_node */
1179         if (priv->cmd_array) {
1180                 kfree(priv->cmd_array);
1181                 priv->cmd_array = NULL;
1182         }
1183 
1184 done:
1185         return 0;
1186 }
1187 
1188 /**
1189  *  lbs_get_free_cmd_node - gets a free command node if available in
1190  *  command free queue
1191  *
1192  *  @priv:      A pointer to &struct lbs_private structure
1193  *
1194  *  returns:    A pointer to &cmd_ctrl_node structure on success
1195  *              or %NULL on error
1196  */
1197 static struct cmd_ctrl_node *lbs_get_free_cmd_node(struct lbs_private *priv)
1198 {
1199         struct cmd_ctrl_node *tempnode;
1200         unsigned long flags;
1201 
1202         if (!priv)
1203                 return NULL;
1204 
1205         spin_lock_irqsave(&priv->driver_lock, flags);
1206 
1207         if (!list_empty(&priv->cmdfreeq)) {
1208                 tempnode = list_first_entry(&priv->cmdfreeq,
1209                                             struct cmd_ctrl_node, list);
1210                 list_del_init(&tempnode->list);
1211         } else {
1212                 lbs_deb_host("GET_CMD_NODE: cmd_ctrl_node is not available\n");
1213                 tempnode = NULL;
1214         }
1215 
1216         spin_unlock_irqrestore(&priv->driver_lock, flags);
1217 
1218         return tempnode;
1219 }
1220 
1221 /**
1222  *  lbs_execute_next_command - execute next command in command
1223  *  pending queue. Will put firmware back to PS mode if applicable.
1224  *
1225  *  @priv:      A pointer to &struct lbs_private structure
1226  *
1227  *  returns:    0 on success or -1 on error
1228  */
1229 int lbs_execute_next_command(struct lbs_private *priv)
1230 {
1231         struct cmd_ctrl_node *cmdnode = NULL;
1232         struct cmd_header *cmd;
1233         unsigned long flags;
1234         int ret = 0;
1235 
1236         /* Debug group is LBS_DEB_THREAD and not LBS_DEB_HOST, because the
1237          * only caller to us is lbs_thread() and we get even when a
1238          * data packet is received */
1239         spin_lock_irqsave(&priv->driver_lock, flags);
1240 
1241         if (priv->cur_cmd) {
1242                 netdev_alert(priv->dev,
1243                              "EXEC_NEXT_CMD: already processing command!\n");
1244                 spin_unlock_irqrestore(&priv->driver_lock, flags);
1245                 ret = -1;
1246                 goto done;
1247         }
1248 
1249         if (!list_empty(&priv->cmdpendingq)) {
1250                 cmdnode = list_first_entry(&priv->cmdpendingq,
1251                                            struct cmd_ctrl_node, list);
1252         }
1253 
1254         spin_unlock_irqrestore(&priv->driver_lock, flags);
1255 
1256         if (cmdnode) {
1257                 cmd = cmdnode->cmdbuf;
1258 
1259                 if (is_command_allowed_in_ps(le16_to_cpu(cmd->command))) {
1260                         if ((priv->psstate == PS_STATE_SLEEP) ||
1261                             (priv->psstate == PS_STATE_PRE_SLEEP)) {
1262                                 lbs_deb_host(
1263                                        "EXEC_NEXT_CMD: cannot send cmd 0x%04x in psstate %d\n",
1264                                        le16_to_cpu(cmd->command),
1265                                        priv->psstate);
1266                                 ret = -1;
1267                                 goto done;
1268                         }
1269                         lbs_deb_host("EXEC_NEXT_CMD: OK to send command "
1270                                      "0x%04x in psstate %d\n",
1271                                      le16_to_cpu(cmd->command), priv->psstate);
1272                 } else if (priv->psstate != PS_STATE_FULL_POWER) {
1273                         /*
1274                          * 1. Non-PS command:
1275                          * Queue it. set needtowakeup to TRUE if current state
1276                          * is SLEEP, otherwise call send EXIT_PS.
1277                          * 2. PS command but not EXIT_PS:
1278                          * Ignore it.
1279                          * 3. PS command EXIT_PS:
1280                          * Set needtowakeup to TRUE if current state is SLEEP,
1281                          * otherwise send this command down to firmware
1282                          * immediately.
1283                          */
1284                         if (cmd->command != cpu_to_le16(CMD_802_11_PS_MODE)) {
1285                                 /*  Prepare to send Exit PS,
1286                                  *  this non PS command will be sent later */
1287                                 if ((priv->psstate == PS_STATE_SLEEP)
1288                                     || (priv->psstate == PS_STATE_PRE_SLEEP)
1289                                     ) {
1290                                         /* w/ new scheme, it will not reach here.
1291                                            since it is blocked in main_thread. */
1292                                         priv->needtowakeup = 1;
1293                                 } else {
1294                                         lbs_set_ps_mode(priv,
1295                                                         PS_MODE_ACTION_EXIT_PS,
1296                                                         false);
1297                                 }
1298 
1299                                 ret = 0;
1300                                 goto done;
1301                         } else {
1302                                 /*
1303                                  * PS command. Ignore it if it is not Exit_PS.
1304                                  * otherwise send it down immediately.
1305                                  */
1306                                 struct cmd_ds_802_11_ps_mode *psm = (void *)cmd;
1307 
1308                                 lbs_deb_host(
1309                                        "EXEC_NEXT_CMD: PS cmd, action 0x%02x\n",
1310                                        psm->action);
1311                                 if (psm->action !=
1312                                     cpu_to_le16(PS_MODE_ACTION_EXIT_PS)) {
1313                                         lbs_deb_host(
1314                                                "EXEC_NEXT_CMD: ignore ENTER_PS cmd\n");
1315                                         lbs_complete_command(priv, cmdnode, 0);
1316 
1317                                         ret = 0;
1318                                         goto done;
1319                                 }
1320 
1321                                 if ((priv->psstate == PS_STATE_SLEEP) ||
1322                                     (priv->psstate == PS_STATE_PRE_SLEEP)) {
1323                                         lbs_deb_host(
1324                                                "EXEC_NEXT_CMD: ignore EXIT_PS cmd in sleep\n");
1325                                         lbs_complete_command(priv, cmdnode, 0);
1326                                         priv->needtowakeup = 1;
1327 
1328                                         ret = 0;
1329                                         goto done;
1330                                 }
1331 
1332                                 lbs_deb_host(
1333                                        "EXEC_NEXT_CMD: sending EXIT_PS\n");
1334                         }
1335                 }
1336                 spin_lock_irqsave(&priv->driver_lock, flags);
1337                 list_del_init(&cmdnode->list);
1338                 spin_unlock_irqrestore(&priv->driver_lock, flags);
1339                 lbs_deb_host("EXEC_NEXT_CMD: sending command 0x%04x\n",
1340                             le16_to_cpu(cmd->command));
1341                 lbs_submit_command(priv, cmdnode);
1342         } else {
1343                 /*
1344                  * check if in power save mode, if yes, put the device back
1345                  * to PS mode
1346                  */
1347                 if ((priv->psmode != LBS802_11POWERMODECAM) &&
1348                     (priv->psstate == PS_STATE_FULL_POWER) &&
1349                     (priv->connect_status == LBS_CONNECTED)) {
1350                         lbs_deb_host(
1351                                 "EXEC_NEXT_CMD: cmdpendingq empty, go back to PS_SLEEP");
1352                         lbs_set_ps_mode(priv, PS_MODE_ACTION_ENTER_PS,
1353                                         false);
1354                 }
1355         }
1356 
1357         ret = 0;
1358 done:
1359         return ret;
1360 }
1361 
1362 static void lbs_send_confirmsleep(struct lbs_private *priv)
1363 {
1364         unsigned long flags;
1365         int ret;
1366 
1367         lbs_deb_hex(LBS_DEB_HOST, "sleep confirm", (u8 *) &confirm_sleep,
1368                 sizeof(confirm_sleep));
1369 
1370         ret = priv->hw_host_to_card(priv, MVMS_CMD, (u8 *) &confirm_sleep,
1371                 sizeof(confirm_sleep));
1372         if (ret) {
1373                 netdev_alert(priv->dev, "confirm_sleep failed\n");
1374                 return;
1375         }
1376 
1377         spin_lock_irqsave(&priv->driver_lock, flags);
1378 
1379         /* We don't get a response on the sleep-confirmation */
1380         priv->dnld_sent = DNLD_RES_RECEIVED;
1381 
1382         if (priv->is_host_sleep_configured) {
1383                 priv->is_host_sleep_activated = 1;
1384                 wake_up_interruptible(&priv->host_sleep_q);
1385         }
1386 
1387         /* If nothing to do, go back to sleep (?) */
1388         if (!kfifo_len(&priv->event_fifo) && !priv->resp_len[priv->resp_idx])
1389                 priv->psstate = PS_STATE_SLEEP;
1390 
1391         spin_unlock_irqrestore(&priv->driver_lock, flags);
1392 }
1393 
1394 /**
1395  * lbs_ps_confirm_sleep - checks condition and prepares to
1396  * send sleep confirm command to firmware if ok
1397  *
1398  * @priv:       A pointer to &struct lbs_private structure
1399  *
1400  * returns:     n/a
1401  */
1402 void lbs_ps_confirm_sleep(struct lbs_private *priv)
1403 {
1404         unsigned long flags =0;
1405         int allowed = 1;
1406 
1407         spin_lock_irqsave(&priv->driver_lock, flags);
1408         if (priv->dnld_sent) {
1409                 allowed = 0;
1410                 lbs_deb_host("dnld_sent was set\n");
1411         }
1412 
1413         /* In-progress command? */
1414         if (priv->cur_cmd) {
1415                 allowed = 0;
1416                 lbs_deb_host("cur_cmd was set\n");
1417         }
1418 
1419         /* Pending events or command responses? */
1420         if (kfifo_len(&priv->event_fifo) || priv->resp_len[priv->resp_idx]) {
1421                 allowed = 0;
1422                 lbs_deb_host("pending events or command responses\n");
1423         }
1424         spin_unlock_irqrestore(&priv->driver_lock, flags);
1425 
1426         if (allowed) {
1427                 lbs_deb_host("sending lbs_ps_confirm_sleep\n");
1428                 lbs_send_confirmsleep(priv);
1429         } else {
1430                 lbs_deb_host("sleep confirm has been delayed\n");
1431         }
1432 }
1433 
1434 
1435 /**
1436  * lbs_set_tpc_cfg - Configures the transmission power control functionality
1437  *
1438  * @priv:       A pointer to &struct lbs_private structure
1439  * @enable:     Transmission power control enable
1440  * @p0:         Power level when link quality is good (dBm).
1441  * @p1:         Power level when link quality is fair (dBm).
1442  * @p2:         Power level when link quality is poor (dBm).
1443  * @usesnr:     Use Signal to Noise Ratio in TPC
1444  *
1445  * returns:     0 on success
1446  */
1447 int lbs_set_tpc_cfg(struct lbs_private *priv, int enable, int8_t p0, int8_t p1,
1448                 int8_t p2, int usesnr)
1449 {
1450         struct cmd_ds_802_11_tpc_cfg cmd;
1451         int ret;
1452 
1453         memset(&cmd, 0, sizeof(cmd));
1454         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
1455         cmd.action = cpu_to_le16(CMD_ACT_SET);
1456         cmd.enable = !!enable;
1457         cmd.usesnr = !!usesnr;
1458         cmd.P0 = p0;
1459         cmd.P1 = p1;
1460         cmd.P2 = p2;
1461 
1462         ret = lbs_cmd_with_response(priv, CMD_802_11_TPC_CFG, &cmd);
1463 
1464         return ret;
1465 }
1466 
1467 /**
1468  * lbs_set_power_adapt_cfg - Configures the power adaptation settings
1469  *
1470  * @priv:       A pointer to &struct lbs_private structure
1471  * @enable:     Power adaptation enable
1472  * @p0:         Power level for 1, 2, 5.5 and 11 Mbps (dBm).
1473  * @p1:         Power level for 6, 9, 12, 18, 22, 24 and 36 Mbps (dBm).
1474  * @p2:         Power level for 48 and 54 Mbps (dBm).
1475  *
1476  * returns:     0 on Success
1477  */
1478 
1479 int lbs_set_power_adapt_cfg(struct lbs_private *priv, int enable, int8_t p0,
1480                 int8_t p1, int8_t p2)
1481 {
1482         struct cmd_ds_802_11_pa_cfg cmd;
1483         int ret;
1484 
1485         memset(&cmd, 0, sizeof(cmd));
1486         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
1487         cmd.action = cpu_to_le16(CMD_ACT_SET);
1488         cmd.enable = !!enable;
1489         cmd.P0 = p0;
1490         cmd.P1 = p1;
1491         cmd.P2 = p2;
1492 
1493         ret = lbs_cmd_with_response(priv, CMD_802_11_PA_CFG , &cmd);
1494 
1495         return ret;
1496 }
1497 
1498 
1499 struct cmd_ctrl_node *__lbs_cmd_async(struct lbs_private *priv,
1500         uint16_t command, struct cmd_header *in_cmd, int in_cmd_size,
1501         int (*callback)(struct lbs_private *, unsigned long, struct cmd_header *),
1502         unsigned long callback_arg)
1503 {
1504         struct cmd_ctrl_node *cmdnode;
1505 
1506         if (priv->surpriseremoved) {
1507                 lbs_deb_host("PREP_CMD: card removed\n");
1508                 cmdnode = ERR_PTR(-ENOENT);
1509                 goto done;
1510         }
1511 
1512         /* No commands are allowed in Deep Sleep until we toggle the GPIO
1513          * to wake up the card and it has signaled that it's ready.
1514          */
1515         if (!priv->is_auto_deep_sleep_enabled) {
1516                 if (priv->is_deep_sleep) {
1517                         lbs_deb_cmd("command not allowed in deep sleep\n");
1518                         cmdnode = ERR_PTR(-EBUSY);
1519                         goto done;
1520                 }
1521         }
1522 
1523         cmdnode = lbs_get_free_cmd_node(priv);
1524         if (cmdnode == NULL) {
1525                 lbs_deb_host("PREP_CMD: cmdnode is NULL\n");
1526 
1527                 /* Wake up main thread to execute next command */
1528                 wake_up(&priv->waitq);
1529                 cmdnode = ERR_PTR(-ENOBUFS);
1530                 goto done;
1531         }
1532 
1533         cmdnode->callback = callback;
1534         cmdnode->callback_arg = callback_arg;
1535 
1536         /* Copy the incoming command to the buffer */
1537         memcpy(cmdnode->cmdbuf, in_cmd, in_cmd_size);
1538 
1539         /* Set command, clean result, move to buffer */
1540         cmdnode->cmdbuf->command = cpu_to_le16(command);
1541         cmdnode->cmdbuf->size    = cpu_to_le16(in_cmd_size);
1542         cmdnode->cmdbuf->result  = 0;
1543 
1544         lbs_deb_host("PREP_CMD: command 0x%04x\n", command);
1545 
1546         cmdnode->cmdwaitqwoken = 0;
1547         lbs_queue_cmd(priv, cmdnode);
1548         wake_up(&priv->waitq);
1549 
1550  done:
1551         return cmdnode;
1552 }
1553 
1554 void lbs_cmd_async(struct lbs_private *priv, uint16_t command,
1555         struct cmd_header *in_cmd, int in_cmd_size)
1556 {
1557         __lbs_cmd_async(priv, command, in_cmd, in_cmd_size,
1558                 lbs_cmd_async_callback, 0);
1559 }
1560 
1561 int __lbs_cmd(struct lbs_private *priv, uint16_t command,
1562               struct cmd_header *in_cmd, int in_cmd_size,
1563               int (*callback)(struct lbs_private *, unsigned long, struct cmd_header *),
1564               unsigned long callback_arg)
1565 {
1566         struct cmd_ctrl_node *cmdnode;
1567         unsigned long flags;
1568         int ret = 0;
1569 
1570         cmdnode = __lbs_cmd_async(priv, command, in_cmd, in_cmd_size,
1571                                   callback, callback_arg);
1572         if (IS_ERR(cmdnode)) {
1573                 ret = PTR_ERR(cmdnode);
1574                 goto done;
1575         }
1576 
1577         might_sleep();
1578 
1579         /*
1580          * Be careful with signals here. A signal may be received as the system
1581          * goes into suspend or resume. We do not want this to interrupt the
1582          * command, so we perform an uninterruptible sleep.
1583          */
1584         wait_event(cmdnode->cmdwait_q, cmdnode->cmdwaitqwoken);
1585 
1586         spin_lock_irqsave(&priv->driver_lock, flags);
1587         ret = cmdnode->result;
1588         if (ret)
1589                 netdev_info(priv->dev, "PREP_CMD: command 0x%04x failed: %d\n",
1590                             command, ret);
1591 
1592         __lbs_cleanup_and_insert_cmd(priv, cmdnode);
1593         spin_unlock_irqrestore(&priv->driver_lock, flags);
1594 
1595 done:
1596         return ret;
1597 }
1598 EXPORT_SYMBOL_GPL(__lbs_cmd);
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/net/wireless/marvell/libertas/cmd.c

DEFINITIONS
