drivers/net/wireless/iwlwifi/mvm/utils.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) 2012 - 2014 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 COPYING.
  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) 2012 - 2014 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 <net/mac80211.h>
  64
  65 #include "iwl-debug.h"
  66 #include "iwl-io.h"
  67
  68 #include "mvm.h"
  69 #include "fw-api-rs.h"
  70
  71 /*
  72  * Will return 0 even if the cmd failed when RFKILL is asserted unless
  73  * CMD_WANT_SKB is set in cmd->flags.
  74  */
  75 int iwl_mvm_send_cmd(struct iwl_mvm *mvm, struct iwl_host_cmd *cmd)
  76 {
  77         int ret;
  78
  79 #if defined(CONFIG_IWLWIFI_DEBUGFS) && defined(CONFIG_PM_SLEEP)
  80         if (WARN_ON(mvm->d3_test_active))
  81                 return -EIO;
  82 #endif
  83
  84         /*
  85          * Synchronous commands from this op-mode must hold
  86          * the mutex, this ensures we don't try to send two
  87          * (or more) synchronous commands at a time.
  88          */
  89         if (!(cmd->flags & CMD_ASYNC))
  90                 lockdep_assert_held(&mvm->mutex);
  91
  92         ret = iwl_trans_send_cmd(mvm->trans, cmd);
  93
  94         /*
  95          * If the caller wants the SKB, then don't hide any problems, the
  96          * caller might access the response buffer which will be NULL if
  97          * the command failed.
  98          */
  99         if (cmd->flags & CMD_WANT_SKB)
 100                 return ret;
 101
 102         /* Silently ignore failures if RFKILL is asserted */
 103         if (!ret || ret == -ERFKILL)
 104                 return 0;
 105         return ret;
 106 }
 107
 108 int iwl_mvm_send_cmd_pdu(struct iwl_mvm *mvm, u8 id,
 109                          u32 flags, u16 len, const void *data)
 110 {
 111         struct iwl_host_cmd cmd = {
 112                 .id = id,
 113                 .len = { len, },
 114                 .data = { data, },
 115                 .flags = flags,
 116         };
 117
 118         return iwl_mvm_send_cmd(mvm, &cmd);
 119 }
 120
 121 /*
 122  * We assume that the caller set the status to the sucess value
 123  */
 124 int iwl_mvm_send_cmd_status(struct iwl_mvm *mvm, struct iwl_host_cmd *cmd,
 125                             u32 *status)
 126 {
 127         struct iwl_rx_packet *pkt;
 128         struct iwl_cmd_response *resp;
 129         int ret, resp_len;
 130
 131         lockdep_assert_held(&mvm->mutex);
 132
 133 #if defined(CONFIG_IWLWIFI_DEBUGFS) && defined(CONFIG_PM_SLEEP)
 134         if (WARN_ON(mvm->d3_test_active))
 135                 return -EIO;
 136 #endif
 137
 138         /*
 139          * Only synchronous commands can wait for status,
 140          * we use WANT_SKB so the caller can't.
 141          */
 142         if (WARN_ONCE(cmd->flags & (CMD_ASYNC | CMD_WANT_SKB),
 143                       "cmd flags %x", cmd->flags))
 144                 return -EINVAL;
 145
 146         cmd->flags |= CMD_SYNC | CMD_WANT_SKB;
 147
 148         ret = iwl_trans_send_cmd(mvm->trans, cmd);
 149         if (ret == -ERFKILL) {
 150                 /*
 151                  * The command failed because of RFKILL, don't update
 152                  * the status, leave it as success and return 0.
 153                  */
 154                 return 0;
 155         } else if (ret) {
 156                 return ret;
 157         }
 158
 159         pkt = cmd->resp_pkt;
 160         /* Can happen if RFKILL is asserted */
 161         if (!pkt) {
 162                 ret = 0;
 163                 goto out_free_resp;
 164         }
 165
 166         if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
 167                 ret = -EIO;
 168                 goto out_free_resp;
 169         }
 170
 171         resp_len = iwl_rx_packet_payload_len(pkt);
 172         if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
 173                 ret = -EIO;
 174                 goto out_free_resp;
 175         }
 176
 177         resp = (void *)pkt->data;
 178         *status = le32_to_cpu(resp->status);
 179  out_free_resp:
 180         iwl_free_resp(cmd);
 181         return ret;
 182 }
 183
 184 /*
 185  * We assume that the caller set the status to the sucess value
 186  */
 187 int iwl_mvm_send_cmd_pdu_status(struct iwl_mvm *mvm, u8 id, u16 len,
 188                                 const void *data, u32 *status)
 189 {
 190         struct iwl_host_cmd cmd = {
 191                 .id = id,
 192                 .len = { len, },
 193                 .data = { data, },
 194         };
 195
 196         return iwl_mvm_send_cmd_status(mvm, &cmd, status);
 197 }
 198
 199 #define IWL_DECLARE_RATE_INFO(r) \
 200         [IWL_RATE_##r##M_INDEX] = IWL_RATE_##r##M_PLCP
 201
 202 /*
 203  * Translate from fw_rate_index (IWL_RATE_XXM_INDEX) to PLCP
 204  */
 205 static const u8 fw_rate_idx_to_plcp[IWL_RATE_COUNT] = {
 206         IWL_DECLARE_RATE_INFO(1),
 207         IWL_DECLARE_RATE_INFO(2),
 208         IWL_DECLARE_RATE_INFO(5),
 209         IWL_DECLARE_RATE_INFO(11),
 210         IWL_DECLARE_RATE_INFO(6),
 211         IWL_DECLARE_RATE_INFO(9),
 212         IWL_DECLARE_RATE_INFO(12),
 213         IWL_DECLARE_RATE_INFO(18),
 214         IWL_DECLARE_RATE_INFO(24),
 215         IWL_DECLARE_RATE_INFO(36),
 216         IWL_DECLARE_RATE_INFO(48),
 217         IWL_DECLARE_RATE_INFO(54),
 218 };
 219
 220 int iwl_mvm_legacy_rate_to_mac80211_idx(u32 rate_n_flags,
 221                                         enum ieee80211_band band)
 222 {
 223         int rate = rate_n_flags & RATE_LEGACY_RATE_MSK;
 224         int idx;
 225         int band_offset = 0;
 226
 227         /* Legacy rate format, search for match in table */
 228         if (band == IEEE80211_BAND_5GHZ)
 229                 band_offset = IWL_FIRST_OFDM_RATE;
 230         for (idx = band_offset; idx < IWL_RATE_COUNT_LEGACY; idx++)
 231                 if (fw_rate_idx_to_plcp[idx] == rate)
 232                         return idx - band_offset;
 233
 234         return -1;
 235 }
 236
 237 u8 iwl_mvm_mac80211_idx_to_hwrate(int rate_idx)
 238 {
 239         /* Get PLCP rate for tx_cmd->rate_n_flags */
 240         return fw_rate_idx_to_plcp[rate_idx];
 241 }
 242
 243 int iwl_mvm_rx_fw_error(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
 244                           struct iwl_device_cmd *cmd)
 245 {
 246         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 247         struct iwl_error_resp *err_resp = (void *)pkt->data;
 248
 249         IWL_ERR(mvm, "FW Error notification: type 0x%08X cmd_id 0x%02X\n",
 250                 le32_to_cpu(err_resp->error_type), err_resp->cmd_id);
 251         IWL_ERR(mvm, "FW Error notification: seq 0x%04X service 0x%08X\n",
 252                 le16_to_cpu(err_resp->bad_cmd_seq_num),
 253                 le32_to_cpu(err_resp->error_service));
 254         IWL_ERR(mvm, "FW Error notification: timestamp 0x%16llX\n",
 255                 le64_to_cpu(err_resp->timestamp));
 256         return 0;
 257 }
 258
 259 /*
 260  * Returns the first antenna as ANT_[ABC], as defined in iwl-config.h.
 261  * The parameter should also be a combination of ANT_[ABC].
 262  */
 263 u8 first_antenna(u8 mask)
 264 {
 265         BUILD_BUG_ON(ANT_A != BIT(0)); /* using ffs is wrong if not */
 266         if (WARN_ON_ONCE(!mask)) /* ffs will return 0 if mask is zeroed */
 267                 return BIT(0);
 268         return BIT(ffs(mask) - 1);
 269 }
 270
 271 /*
 272  * Toggles between TX antennas to send the probe request on.
 273  * Receives the bitmask of valid TX antennas and the *index* used
 274  * for the last TX, and returns the next valid *index* to use.
 275  * In order to set it in the tx_cmd, must do BIT(idx).
 276  */
 277 u8 iwl_mvm_next_antenna(struct iwl_mvm *mvm, u8 valid, u8 last_idx)
 278 {
 279         u8 ind = last_idx;
 280         int i;
 281
 282         for (i = 0; i < RATE_MCS_ANT_NUM; i++) {
 283                 ind = (ind + 1) % RATE_MCS_ANT_NUM;
 284                 if (valid & BIT(ind))
 285                         return ind;
 286         }
 287
 288         WARN_ONCE(1, "Failed to toggle between antennas 0x%x", valid);
 289         return last_idx;
 290 }
 291
 292 static struct {
 293         char *name;
 294         u8 num;
 295 } advanced_lookup[] = {
 296         { "NMI_INTERRUPT_WDG", 0x34 },
 297         { "SYSASSERT", 0x35 },
 298         { "UCODE_VERSION_MISMATCH", 0x37 },
 299         { "BAD_COMMAND", 0x38 },
 300         { "NMI_INTERRUPT_DATA_ACTION_PT", 0x3C },
 301         { "FATAL_ERROR", 0x3D },
 302         { "NMI_TRM_HW_ERR", 0x46 },
 303         { "NMI_INTERRUPT_TRM", 0x4C },
 304         { "NMI_INTERRUPT_BREAK_POINT", 0x54 },
 305         { "NMI_INTERRUPT_WDG_RXF_FULL", 0x5C },
 306         { "NMI_INTERRUPT_WDG_NO_RBD_RXF_FULL", 0x64 },
 307         { "NMI_INTERRUPT_HOST", 0x66 },
 308         { "NMI_INTERRUPT_ACTION_PT", 0x7C },
 309         { "NMI_INTERRUPT_UNKNOWN", 0x84 },
 310         { "NMI_INTERRUPT_INST_ACTION_PT", 0x86 },
 311         { "ADVANCED_SYSASSERT", 0 },
 312 };
 313
 314 static const char *desc_lookup(u32 num)
 315 {
 316         int i;
 317
 318         for (i = 0; i < ARRAY_SIZE(advanced_lookup) - 1; i++)
 319                 if (advanced_lookup[i].num == num)
 320                         return advanced_lookup[i].name;
 321
 322         /* No entry matches 'num', so it is the last: ADVANCED_SYSASSERT */
 323         return advanced_lookup[i].name;
 324 }
 325
 326 /*
 327  * Note: This structure is read from the device with IO accesses,
 328  * and the reading already does the endian conversion. As it is
 329  * read with u32-sized accesses, any members with a different size
 330  * need to be ordered correctly though!
 331  */
 332 struct iwl_error_event_table {
 333         u32 valid;              /* (nonzero) valid, (0) log is empty */
 334         u32 error_id;           /* type of error */
 335         u32 pc;                 /* program counter */
 336         u32 blink1;             /* branch link */
 337         u32 blink2;             /* branch link */
 338         u32 ilink1;             /* interrupt link */
 339         u32 ilink2;             /* interrupt link */
 340         u32 data1;              /* error-specific data */
 341         u32 data2;              /* error-specific data */
 342         u32 data3;              /* error-specific data */
 343         u32 bcon_time;          /* beacon timer */
 344         u32 tsf_low;            /* network timestamp function timer */
 345         u32 tsf_hi;             /* network timestamp function timer */
 346         u32 gp1;                /* GP1 timer register */
 347         u32 gp2;                /* GP2 timer register */
 348         u32 gp3;                /* GP3 timer register */
 349         u32 ucode_ver;          /* uCode version */
 350         u32 hw_ver;             /* HW Silicon version */
 351         u32 brd_ver;            /* HW board version */
 352         u32 log_pc;             /* log program counter */
 353         u32 frame_ptr;          /* frame pointer */
 354         u32 stack_ptr;          /* stack pointer */
 355         u32 hcmd;               /* last host command header */
 356         u32 isr0;               /* isr status register LMPM_NIC_ISR0:
 357                                  * rxtx_flag */
 358         u32 isr1;               /* isr status register LMPM_NIC_ISR1:
 359                                  * host_flag */
 360         u32 isr2;               /* isr status register LMPM_NIC_ISR2:
 361                                  * enc_flag */
 362         u32 isr3;               /* isr status register LMPM_NIC_ISR3:
 363                                  * time_flag */
 364         u32 isr4;               /* isr status register LMPM_NIC_ISR4:
 365                                  * wico interrupt */
 366         u32 isr_pref;           /* isr status register LMPM_NIC_PREF_STAT */
 367         u32 wait_event;         /* wait event() caller address */
 368         u32 l2p_control;        /* L2pControlField */
 369         u32 l2p_duration;       /* L2pDurationField */
 370         u32 l2p_mhvalid;        /* L2pMhValidBits */
 371         u32 l2p_addr_match;     /* L2pAddrMatchStat */
 372         u32 lmpm_pmg_sel;       /* indicate which clocks are turned on
 373                                  * (LMPM_PMG_SEL) */
 374         u32 u_timestamp;        /* indicate when the date and time of the
 375                                  * compilation */
 376         u32 flow_handler;       /* FH read/write pointers, RX credit */
 377 } __packed;
 378
 379 #define ERROR_START_OFFSET  (1 * sizeof(u32))
 380 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
 381
 382 void iwl_mvm_dump_nic_error_log(struct iwl_mvm *mvm)
 383 {
 384         struct iwl_trans *trans = mvm->trans;
 385         struct iwl_error_event_table table;
 386         u32 base;
 387
 388         base = mvm->error_event_table;
 389         if (mvm->cur_ucode == IWL_UCODE_INIT) {
 390                 if (!base)
 391                         base = mvm->fw->init_errlog_ptr;
 392         } else {
 393                 if (!base)
 394                         base = mvm->fw->inst_errlog_ptr;
 395         }
 396
 397         if (base < 0x800000 || base >= 0x80C000) {
 398                 IWL_ERR(mvm,
 399                         "Not valid error log pointer 0x%08X for %s uCode\n",
 400                         base,
 401                         (mvm->cur_ucode == IWL_UCODE_INIT)
 402                                         ? "Init" : "RT");
 403                 return;
 404         }
 405
 406         iwl_trans_read_mem_bytes(trans, base, &table, sizeof(table));
 407
 408         if (ERROR_START_OFFSET <= table.valid * ERROR_ELEM_SIZE) {
 409                 IWL_ERR(trans, "Start IWL Error Log Dump:\n");
 410                 IWL_ERR(trans, "Status: 0x%08lX, count: %d\n",
 411                         mvm->status, table.valid);
 412         }
 413
 414         trace_iwlwifi_dev_ucode_error(trans->dev, table.error_id, table.tsf_low,
 415                                       table.data1, table.data2, table.data3,
 416                                       table.blink1, table.blink2, table.ilink1,
 417                                       table.ilink2, table.bcon_time, table.gp1,
 418                                       table.gp2, table.gp3, table.ucode_ver,
 419                                       table.hw_ver, table.brd_ver);
 420         IWL_ERR(mvm, "0x%08X | %-28s\n", table.error_id,
 421                 desc_lookup(table.error_id));
 422         IWL_ERR(mvm, "0x%08X | uPc\n", table.pc);
 423         IWL_ERR(mvm, "0x%08X | branchlink1\n", table.blink1);
 424         IWL_ERR(mvm, "0x%08X | branchlink2\n", table.blink2);
 425         IWL_ERR(mvm, "0x%08X | interruptlink1\n", table.ilink1);
 426         IWL_ERR(mvm, "0x%08X | interruptlink2\n", table.ilink2);
 427         IWL_ERR(mvm, "0x%08X | data1\n", table.data1);
 428         IWL_ERR(mvm, "0x%08X | data2\n", table.data2);
 429         IWL_ERR(mvm, "0x%08X | data3\n", table.data3);
 430         IWL_ERR(mvm, "0x%08X | beacon time\n", table.bcon_time);
 431         IWL_ERR(mvm, "0x%08X | tsf low\n", table.tsf_low);
 432         IWL_ERR(mvm, "0x%08X | tsf hi\n", table.tsf_hi);
 433         IWL_ERR(mvm, "0x%08X | time gp1\n", table.gp1);
 434         IWL_ERR(mvm, "0x%08X | time gp2\n", table.gp2);
 435         IWL_ERR(mvm, "0x%08X | time gp3\n", table.gp3);
 436         IWL_ERR(mvm, "0x%08X | uCode version\n", table.ucode_ver);
 437         IWL_ERR(mvm, "0x%08X | hw version\n", table.hw_ver);
 438         IWL_ERR(mvm, "0x%08X | board version\n", table.brd_ver);
 439         IWL_ERR(mvm, "0x%08X | hcmd\n", table.hcmd);
 440         IWL_ERR(mvm, "0x%08X | isr0\n", table.isr0);
 441         IWL_ERR(mvm, "0x%08X | isr1\n", table.isr1);
 442         IWL_ERR(mvm, "0x%08X | isr2\n", table.isr2);
 443         IWL_ERR(mvm, "0x%08X | isr3\n", table.isr3);
 444         IWL_ERR(mvm, "0x%08X | isr4\n", table.isr4);
 445         IWL_ERR(mvm, "0x%08X | isr_pref\n", table.isr_pref);
 446         IWL_ERR(mvm, "0x%08X | wait_event\n", table.wait_event);
 447         IWL_ERR(mvm, "0x%08X | l2p_control\n", table.l2p_control);
 448         IWL_ERR(mvm, "0x%08X | l2p_duration\n", table.l2p_duration);
 449         IWL_ERR(mvm, "0x%08X | l2p_mhvalid\n", table.l2p_mhvalid);
 450         IWL_ERR(mvm, "0x%08X | l2p_addr_match\n", table.l2p_addr_match);
 451         IWL_ERR(mvm, "0x%08X | lmpm_pmg_sel\n", table.lmpm_pmg_sel);
 452         IWL_ERR(mvm, "0x%08X | timestamp\n", table.u_timestamp);
 453         IWL_ERR(mvm, "0x%08X | flow_handler\n", table.flow_handler);
 454 }
 455
 456 void iwl_mvm_dump_sram(struct iwl_mvm *mvm)
 457 {
 458         const struct fw_img *img;
 459         int ofs, len = 0;
 460         u8 *buf;
 461
 462         if (!mvm->ucode_loaded)
 463                 return;
 464
 465         img = &mvm->fw->img[mvm->cur_ucode];
 466         ofs = img->sec[IWL_UCODE_SECTION_DATA].offset;
 467         len = img->sec[IWL_UCODE_SECTION_DATA].len;
 468
 469         buf = kzalloc(len, GFP_ATOMIC);
 470         if (!buf)
 471                 return;
 472
 473         iwl_trans_read_mem_bytes(mvm->trans, ofs, buf, len);
 474         iwl_print_hex_error(mvm->trans, buf, len);
 475
 476         kfree(buf);
 477 }
 478
 479 /**
 480  * iwl_mvm_send_lq_cmd() - Send link quality command
 481  * @init: This command is sent as part of station initialization right
 482  *        after station has been added.
 483  *
 484  * The link quality command is sent as the last step of station creation.
 485  * This is the special case in which init is set and we call a callback in
 486  * this case to clear the state indicating that station creation is in
 487  * progress.
 488  */
 489 int iwl_mvm_send_lq_cmd(struct iwl_mvm *mvm, struct iwl_lq_cmd *lq, bool init)
 490 {
 491         struct iwl_host_cmd cmd = {
 492                 .id = LQ_CMD,
 493                 .len = { sizeof(struct iwl_lq_cmd), },
 494                 .flags = init ? CMD_SYNC : CMD_ASYNC,
 495                 .data = { lq, },
 496         };
 497
 498         if (WARN_ON(lq->sta_id == IWL_MVM_STATION_COUNT))
 499                 return -EINVAL;
 500
 501         return iwl_mvm_send_cmd(mvm, &cmd);
 502 }
 503
 504 /**
 505  * iwl_mvm_update_smps - Get a requst to change the SMPS mode
 506  * @req_type: The part of the driver who call for a change.
 507  * @smps_requests: The request to change the SMPS mode.
 508  *
 509  * Get a requst to change the SMPS mode,
 510  * and change it according to all other requests in the driver.
 511  */
 512 void iwl_mvm_update_smps(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 513                          enum iwl_mvm_smps_type_request req_type,
 514                          enum ieee80211_smps_mode smps_request)
 515 {
 516         struct iwl_mvm_vif *mvmvif;
 517         enum ieee80211_smps_mode smps_mode = IEEE80211_SMPS_AUTOMATIC;
 518         int i;
 519
 520         lockdep_assert_held(&mvm->mutex);
 521
 522         /* SMPS is irrelevant for NICs that don't have at least 2 RX antenna */
 523         if (num_of_ant(iwl_fw_valid_rx_ant(mvm->fw)) == 1)
 524                 return;
 525
 526         mvmvif = iwl_mvm_vif_from_mac80211(vif);
 527         mvmvif->smps_requests[req_type] = smps_request;
 528         for (i = 0; i < NUM_IWL_MVM_SMPS_REQ; i++) {
 529                 if (mvmvif->smps_requests[i] == IEEE80211_SMPS_STATIC) {
 530                         smps_mode = IEEE80211_SMPS_STATIC;
 531                         break;
 532                 }
 533                 if (mvmvif->smps_requests[i] == IEEE80211_SMPS_DYNAMIC)
 534                         smps_mode = IEEE80211_SMPS_DYNAMIC;
 535         }
 536
 537         ieee80211_request_smps(vif, smps_mode);
 538 }