drivers/net/wireless/intel/iwlwifi/mvm/utils.c

/* [<][>][^][v][top][bottom][index][help] */
This source file includes following definitions.
iwl_mvm_send_cmd
iwl_mvm_send_cmd_pdu
iwl_mvm_send_cmd_status
iwl_mvm_send_cmd_pdu_status
iwl_mvm_legacy_rate_to_mac80211_idx
iwl_mvm_mac80211_idx_to_hwrate
iwl_mvm_mac80211_ac_to_ucode_ac
iwl_mvm_rx_fw_error
first_antenna
iwl_mvm_next_antenna
desc_lookup
iwl_mvm_dump_umac_error_log
iwl_mvm_dump_lmac_error_log
iwl_mvm_dump_nic_error_log
iwl_mvm_reconfig_scd
iwl_mvm_send_lq_cmd
iwl_mvm_update_smps
iwl_mvm_request_statistics
iwl_mvm_accu_radio_stats
iwl_mvm_diversity_iter
iwl_mvm_rx_diversity_allowed
iwl_mvm_send_low_latency_cmd
iwl_mvm_update_low_latency
iwl_mvm_ll_iter
iwl_mvm_low_latency
iwl_mvm_low_latency_band
iwl_mvm_bss_iface_iterator
iwl_mvm_get_bss_vif
iwl_mvm_sta_iface_iterator
iwl_mvm_is_vif_assoc
iwl_mvm_get_wd_timeout
iwl_mvm_connection_loss
iwl_mvm_event_frame_timeout_callback
iwl_mvm_tcm_load_percentage
iwl_mvm_tcm_load
iwl_mvm_tcm_iter
iwl_mvm_tcm_results
iwl_mvm_tcm_uapsd_nonagg_detected_wk
iwl_mvm_uapsd_agg_disconnect
iwl_mvm_check_uapsd_agg_expected_tpt
iwl_mvm_tcm_iterator
iwl_mvm_calc_tcm_stats
iwl_mvm_recalc_tcm
iwl_mvm_tcm_work
iwl_mvm_pause_tcm
iwl_mvm_resume_tcm
iwl_mvm_tcm_add_vif
iwl_mvm_tcm_rm_vif
iwl_mvm_get_systime
iwl_mvm_get_sync_time
   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  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
  10  * Copyright (C) 2015 - 2017 Intel Deutschland GmbH
  11  * Copyright(c) 2018 Intel Corporation
  12  *
  13  * This program is free software; you can redistribute it and/or modify
  14  * it under the terms of version 2 of the GNU General Public License as
  15  * published by the Free Software Foundation.
  16  *
  17  * This program is distributed in the hope that it will be useful, but
  18  * WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  20  * General Public License for more details.
  21  *
  22  * The full GNU General Public License is included in this distribution
  23  * in the file called COPYING.
  24  *
  25  * Contact Information:
  26  *  Intel Linux Wireless <linuxwifi@intel.com>
  27  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  28  *
  29  * BSD LICENSE
  30  *
  31  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  32  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
  33  * Copyright (C) 2015 - 2017 Intel Deutschland GmbH
  34  * Copyright(c) 2018 Intel Corporation
  35  * All rights reserved.
  36  *
  37  * Redistribution and use in source and binary forms, with or without
  38  * modification, are permitted provided that the following conditions
  39  * are met:
  40  *
  41  *  * Redistributions of source code must retain the above copyright
  42  *    notice, this list of conditions and the following disclaimer.
  43  *  * Redistributions in binary form must reproduce the above copyright
  44  *    notice, this list of conditions and the following disclaimer in
  45  *    the documentation and/or other materials provided with the
  46  *    distribution.
  47  *  * Neither the name Intel Corporation nor the names of its
  48  *    contributors may be used to endorse or promote products derived
  49  *    from this software without specific prior written permission.
  50  *
  51  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  52  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  53  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  54  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  55  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  56  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  57  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  58  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  59  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  60  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  61  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  62  *
  63  *****************************************************************************/
  64 #include <net/mac80211.h>
  65 
  66 #include "iwl-debug.h"
  67 #include "iwl-io.h"
  68 #include "iwl-prph.h"
  69 #include "iwl-csr.h"
  70 #include "mvm.h"
  71 #include "fw/api/rs.h"
  72 
  73 /*
  74  * Will return 0 even if the cmd failed when RFKILL is asserted unless
  75  * CMD_WANT_SKB is set in cmd->flags.
  76  */
  77 int iwl_mvm_send_cmd(struct iwl_mvm *mvm, struct iwl_host_cmd *cmd)
  78 {
  79         int ret;
  80 
  81 #if defined(CONFIG_IWLWIFI_DEBUGFS) && defined(CONFIG_PM_SLEEP)
  82         if (WARN_ON(mvm->d3_test_active))
  83                 return -EIO;
  84 #endif
  85 
  86         /*
  87          * Synchronous commands from this op-mode must hold
  88          * the mutex, this ensures we don't try to send two
  89          * (or more) synchronous commands at a time.
  90          */
  91         if (!(cmd->flags & CMD_ASYNC))
  92                 lockdep_assert_held(&mvm->mutex);
  93 
  94         ret = iwl_trans_send_cmd(mvm->trans, cmd);
  95 
  96         /*
  97          * If the caller wants the SKB, then don't hide any problems, the
  98          * caller might access the response buffer which will be NULL if
  99          * the command failed.
 100          */
 101         if (cmd->flags & CMD_WANT_SKB)
 102                 return ret;
 103 
 104         /* Silently ignore failures if RFKILL is asserted */
 105         if (!ret || ret == -ERFKILL)
 106                 return 0;
 107         return ret;
 108 }
 109 
 110 int iwl_mvm_send_cmd_pdu(struct iwl_mvm *mvm, u32 id,
 111                          u32 flags, u16 len, const void *data)
 112 {
 113         struct iwl_host_cmd cmd = {
 114                 .id = id,
 115                 .len = { len, },
 116                 .data = { data, },
 117                 .flags = flags,
 118         };
 119 
 120         return iwl_mvm_send_cmd(mvm, &cmd);
 121 }
 122 
 123 /*
 124  * We assume that the caller set the status to the success value
 125  */
 126 int iwl_mvm_send_cmd_status(struct iwl_mvm *mvm, struct iwl_host_cmd *cmd,
 127                             u32 *status)
 128 {
 129         struct iwl_rx_packet *pkt;
 130         struct iwl_cmd_response *resp;
 131         int ret, resp_len;
 132 
 133         lockdep_assert_held(&mvm->mutex);
 134 
 135 #if defined(CONFIG_IWLWIFI_DEBUGFS) && defined(CONFIG_PM_SLEEP)
 136         if (WARN_ON(mvm->d3_test_active))
 137                 return -EIO;
 138 #endif
 139 
 140         /*
 141          * Only synchronous commands can wait for status,
 142          * we use WANT_SKB so the caller can't.
 143          */
 144         if (WARN_ONCE(cmd->flags & (CMD_ASYNC | CMD_WANT_SKB),
 145                       "cmd flags %x", cmd->flags))
 146                 return -EINVAL;
 147 
 148         cmd->flags |= CMD_WANT_SKB;
 149 
 150         ret = iwl_trans_send_cmd(mvm->trans, cmd);
 151         if (ret == -ERFKILL) {
 152                 /*
 153                  * The command failed because of RFKILL, don't update
 154                  * the status, leave it as success and return 0.
 155                  */
 156                 return 0;
 157         } else if (ret) {
 158                 return ret;
 159         }
 160 
 161         pkt = cmd->resp_pkt;
 162 
 163         resp_len = iwl_rx_packet_payload_len(pkt);
 164         if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
 165                 ret = -EIO;
 166                 goto out_free_resp;
 167         }
 168 
 169         resp = (void *)pkt->data;
 170         *status = le32_to_cpu(resp->status);
 171  out_free_resp:
 172         iwl_free_resp(cmd);
 173         return ret;
 174 }
 175 
 176 /*
 177  * We assume that the caller set the status to the sucess value
 178  */
 179 int iwl_mvm_send_cmd_pdu_status(struct iwl_mvm *mvm, u32 id, u16 len,
 180                                 const void *data, u32 *status)
 181 {
 182         struct iwl_host_cmd cmd = {
 183                 .id = id,
 184                 .len = { len, },
 185                 .data = { data, },
 186         };
 187 
 188         return iwl_mvm_send_cmd_status(mvm, &cmd, status);
 189 }
 190 
 191 #define IWL_DECLARE_RATE_INFO(r) \
 192         [IWL_RATE_##r##M_INDEX] = IWL_RATE_##r##M_PLCP
 193 
 194 /*
 195  * Translate from fw_rate_index (IWL_RATE_XXM_INDEX) to PLCP
 196  */
 197 static const u8 fw_rate_idx_to_plcp[IWL_RATE_COUNT] = {
 198         IWL_DECLARE_RATE_INFO(1),
 199         IWL_DECLARE_RATE_INFO(2),
 200         IWL_DECLARE_RATE_INFO(5),
 201         IWL_DECLARE_RATE_INFO(11),
 202         IWL_DECLARE_RATE_INFO(6),
 203         IWL_DECLARE_RATE_INFO(9),
 204         IWL_DECLARE_RATE_INFO(12),
 205         IWL_DECLARE_RATE_INFO(18),
 206         IWL_DECLARE_RATE_INFO(24),
 207         IWL_DECLARE_RATE_INFO(36),
 208         IWL_DECLARE_RATE_INFO(48),
 209         IWL_DECLARE_RATE_INFO(54),
 210 };
 211 
 212 int iwl_mvm_legacy_rate_to_mac80211_idx(u32 rate_n_flags,
 213                                         enum nl80211_band band)
 214 {
 215         int rate = rate_n_flags & RATE_LEGACY_RATE_MSK;
 216         int idx;
 217         int band_offset = 0;
 218 
 219         /* Legacy rate format, search for match in table */
 220         if (band == NL80211_BAND_5GHZ)
 221                 band_offset = IWL_FIRST_OFDM_RATE;
 222         for (idx = band_offset; idx < IWL_RATE_COUNT_LEGACY; idx++)
 223                 if (fw_rate_idx_to_plcp[idx] == rate)
 224                         return idx - band_offset;
 225 
 226         return -1;
 227 }
 228 
 229 u8 iwl_mvm_mac80211_idx_to_hwrate(int rate_idx)
 230 {
 231         /* Get PLCP rate for tx_cmd->rate_n_flags */
 232         return fw_rate_idx_to_plcp[rate_idx];
 233 }
 234 
 235 u8 iwl_mvm_mac80211_ac_to_ucode_ac(enum ieee80211_ac_numbers ac)
 236 {
 237         static const u8 mac80211_ac_to_ucode_ac[] = {
 238                 AC_VO,
 239                 AC_VI,
 240                 AC_BE,
 241                 AC_BK
 242         };
 243 
 244         return mac80211_ac_to_ucode_ac[ac];
 245 }
 246 
 247 void iwl_mvm_rx_fw_error(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
 248 {
 249         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 250         struct iwl_error_resp *err_resp = (void *)pkt->data;
 251 
 252         IWL_ERR(mvm, "FW Error notification: type 0x%08X cmd_id 0x%02X\n",
 253                 le32_to_cpu(err_resp->error_type), err_resp->cmd_id);
 254         IWL_ERR(mvm, "FW Error notification: seq 0x%04X service 0x%08X\n",
 255                 le16_to_cpu(err_resp->bad_cmd_seq_num),
 256                 le32_to_cpu(err_resp->error_service));
 257         IWL_ERR(mvm, "FW Error notification: timestamp 0x%016llX\n",
 258                 le64_to_cpu(err_resp->timestamp));
 259 }
 260 
 261 /*
 262  * Returns the first antenna as ANT_[ABC], as defined in iwl-config.h.
 263  * The parameter should also be a combination of ANT_[ABC].
 264  */
 265 u8 first_antenna(u8 mask)
 266 {
 267         BUILD_BUG_ON(ANT_A != BIT(0)); /* using ffs is wrong if not */
 268         if (WARN_ON_ONCE(!mask)) /* ffs will return 0 if mask is zeroed */
 269                 return BIT(0);
 270         return BIT(ffs(mask) - 1);
 271 }
 272 
 273 /*
 274  * Toggles between TX antennas to send the probe request on.
 275  * Receives the bitmask of valid TX antennas and the *index* used
 276  * for the last TX, and returns the next valid *index* to use.
 277  * In order to set it in the tx_cmd, must do BIT(idx).
 278  */
 279 u8 iwl_mvm_next_antenna(struct iwl_mvm *mvm, u8 valid, u8 last_idx)
 280 {
 281         u8 ind = last_idx;
 282         int i;
 283 
 284         for (i = 0; i < MAX_ANT_NUM; i++) {
 285                 ind = (ind + 1) % MAX_ANT_NUM;
 286                 if (valid & BIT(ind))
 287                         return ind;
 288         }
 289 
 290         WARN_ONCE(1, "Failed to toggle between antennas 0x%x", valid);
 291         return last_idx;
 292 }
 293 
 294 #define FW_SYSASSERT_CPU_MASK 0xf0000000
 295 static const struct {
 296         const char *name;
 297         u8 num;
 298 } advanced_lookup[] = {
 299         { "NMI_INTERRUPT_WDG", 0x34 },
 300         { "SYSASSERT", 0x35 },
 301         { "UCODE_VERSION_MISMATCH", 0x37 },
 302         { "BAD_COMMAND", 0x38 },
 303         { "BAD_COMMAND", 0x39 },
 304         { "NMI_INTERRUPT_DATA_ACTION_PT", 0x3C },
 305         { "FATAL_ERROR", 0x3D },
 306         { "NMI_TRM_HW_ERR", 0x46 },
 307         { "NMI_INTERRUPT_TRM", 0x4C },
 308         { "NMI_INTERRUPT_BREAK_POINT", 0x54 },
 309         { "NMI_INTERRUPT_WDG_RXF_FULL", 0x5C },
 310         { "NMI_INTERRUPT_WDG_NO_RBD_RXF_FULL", 0x64 },
 311         { "NMI_INTERRUPT_HOST", 0x66 },
 312         { "NMI_INTERRUPT_LMAC_FATAL", 0x70 },
 313         { "NMI_INTERRUPT_UMAC_FATAL", 0x71 },
 314         { "NMI_INTERRUPT_OTHER_LMAC_FATAL", 0x73 },
 315         { "NMI_INTERRUPT_ACTION_PT", 0x7C },
 316         { "NMI_INTERRUPT_UNKNOWN", 0x84 },
 317         { "NMI_INTERRUPT_INST_ACTION_PT", 0x86 },
 318         { "ADVANCED_SYSASSERT", 0 },
 319 };
 320 
 321 static const char *desc_lookup(u32 num)
 322 {
 323         int i;
 324 
 325         for (i = 0; i < ARRAY_SIZE(advanced_lookup) - 1; i++)
 326                 if (advanced_lookup[i].num == (num & ~FW_SYSASSERT_CPU_MASK))
 327                         return advanced_lookup[i].name;
 328 
 329         /* No entry matches 'num', so it is the last: ADVANCED_SYSASSERT */
 330         return advanced_lookup[i].name;
 331 }
 332 
 333 /*
 334  * Note: This structure is read from the device with IO accesses,
 335  * and the reading already does the endian conversion. As it is
 336  * read with u32-sized accesses, any members with a different size
 337  * need to be ordered correctly though!
 338  */
 339 struct iwl_error_event_table_v1 {
 340         u32 valid;              /* (nonzero) valid, (0) log is empty */
 341         u32 error_id;           /* type of error */
 342         u32 pc;                 /* program counter */
 343         u32 blink1;             /* branch link */
 344         u32 blink2;             /* branch link */
 345         u32 ilink1;             /* interrupt link */
 346         u32 ilink2;             /* interrupt link */
 347         u32 data1;              /* error-specific data */
 348         u32 data2;              /* error-specific data */
 349         u32 data3;              /* error-specific data */
 350         u32 bcon_time;          /* beacon timer */
 351         u32 tsf_low;            /* network timestamp function timer */
 352         u32 tsf_hi;             /* network timestamp function timer */
 353         u32 gp1;                /* GP1 timer register */
 354         u32 gp2;                /* GP2 timer register */
 355         u32 gp3;                /* GP3 timer register */
 356         u32 ucode_ver;          /* uCode version */
 357         u32 hw_ver;             /* HW Silicon version */
 358         u32 brd_ver;            /* HW board version */
 359         u32 log_pc;             /* log program counter */
 360         u32 frame_ptr;          /* frame pointer */
 361         u32 stack_ptr;          /* stack pointer */
 362         u32 hcmd;               /* last host command header */
 363         u32 isr0;               /* isr status register LMPM_NIC_ISR0:
 364                                  * rxtx_flag */
 365         u32 isr1;               /* isr status register LMPM_NIC_ISR1:
 366                                  * host_flag */
 367         u32 isr2;               /* isr status register LMPM_NIC_ISR2:
 368                                  * enc_flag */
 369         u32 isr3;               /* isr status register LMPM_NIC_ISR3:
 370                                  * time_flag */
 371         u32 isr4;               /* isr status register LMPM_NIC_ISR4:
 372                                  * wico interrupt */
 373         u32 isr_pref;           /* isr status register LMPM_NIC_PREF_STAT */
 374         u32 wait_event;         /* wait event() caller address */
 375         u32 l2p_control;        /* L2pControlField */
 376         u32 l2p_duration;       /* L2pDurationField */
 377         u32 l2p_mhvalid;        /* L2pMhValidBits */
 378         u32 l2p_addr_match;     /* L2pAddrMatchStat */
 379         u32 lmpm_pmg_sel;       /* indicate which clocks are turned on
 380                                  * (LMPM_PMG_SEL) */
 381         u32 u_timestamp;        /* indicate when the date and time of the
 382                                  * compilation */
 383         u32 flow_handler;       /* FH read/write pointers, RX credit */
 384 } __packed /* LOG_ERROR_TABLE_API_S_VER_1 */;
 385 
 386 struct iwl_error_event_table {
 387         u32 valid;              /* (nonzero) valid, (0) log is empty */
 388         u32 error_id;           /* type of error */
 389         u32 trm_hw_status0;     /* TRM HW status */
 390         u32 trm_hw_status1;     /* TRM HW status */
 391         u32 blink2;             /* branch link */
 392         u32 ilink1;             /* interrupt link */
 393         u32 ilink2;             /* interrupt link */
 394         u32 data1;              /* error-specific data */
 395         u32 data2;              /* error-specific data */
 396         u32 data3;              /* error-specific data */
 397         u32 bcon_time;          /* beacon timer */
 398         u32 tsf_low;            /* network timestamp function timer */
 399         u32 tsf_hi;             /* network timestamp function timer */
 400         u32 gp1;                /* GP1 timer register */
 401         u32 gp2;                /* GP2 timer register */
 402         u32 fw_rev_type;        /* firmware revision type */
 403         u32 major;              /* uCode version major */
 404         u32 minor;              /* uCode version minor */
 405         u32 hw_ver;             /* HW Silicon version */
 406         u32 brd_ver;            /* HW board version */
 407         u32 log_pc;             /* log program counter */
 408         u32 frame_ptr;          /* frame pointer */
 409         u32 stack_ptr;          /* stack pointer */
 410         u32 hcmd;               /* last host command header */
 411         u32 isr0;               /* isr status register LMPM_NIC_ISR0:
 412                                  * rxtx_flag */
 413         u32 isr1;               /* isr status register LMPM_NIC_ISR1:
 414                                  * host_flag */
 415         u32 isr2;               /* isr status register LMPM_NIC_ISR2:
 416                                  * enc_flag */
 417         u32 isr3;               /* isr status register LMPM_NIC_ISR3:
 418                                  * time_flag */
 419         u32 isr4;               /* isr status register LMPM_NIC_ISR4:
 420                                  * wico interrupt */
 421         u32 last_cmd_id;        /* last HCMD id handled by the firmware */
 422         u32 wait_event;         /* wait event() caller address */
 423         u32 l2p_control;        /* L2pControlField */
 424         u32 l2p_duration;       /* L2pDurationField */
 425         u32 l2p_mhvalid;        /* L2pMhValidBits */
 426         u32 l2p_addr_match;     /* L2pAddrMatchStat */
 427         u32 lmpm_pmg_sel;       /* indicate which clocks are turned on
 428                                  * (LMPM_PMG_SEL) */
 429         u32 u_timestamp;        /* indicate when the date and time of the
 430                                  * compilation */
 431         u32 flow_handler;       /* FH read/write pointers, RX credit */
 432 } __packed /* LOG_ERROR_TABLE_API_S_VER_3 */;
 433 
 434 /*
 435  * UMAC error struct - relevant starting from family 8000 chip.
 436  * Note: This structure is read from the device with IO accesses,
 437  * and the reading already does the endian conversion. As it is
 438  * read with u32-sized accesses, any members with a different size
 439  * need to be ordered correctly though!
 440  */
 441 struct iwl_umac_error_event_table {
 442         u32 valid;              /* (nonzero) valid, (0) log is empty */
 443         u32 error_id;           /* type of error */
 444         u32 blink1;             /* branch link */
 445         u32 blink2;             /* branch link */
 446         u32 ilink1;             /* interrupt link */
 447         u32 ilink2;             /* interrupt link */
 448         u32 data1;              /* error-specific data */
 449         u32 data2;              /* error-specific data */
 450         u32 data3;              /* error-specific data */
 451         u32 umac_major;
 452         u32 umac_minor;
 453         u32 frame_pointer;      /* core register 27*/
 454         u32 stack_pointer;      /* core register 28 */
 455         u32 cmd_header;         /* latest host cmd sent to UMAC */
 456         u32 nic_isr_pref;       /* ISR status register */
 457 } __packed;
 458 
 459 #define ERROR_START_OFFSET  (1 * sizeof(u32))
 460 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
 461 
 462 static void iwl_mvm_dump_umac_error_log(struct iwl_mvm *mvm)
 463 {
 464         struct iwl_trans *trans = mvm->trans;
 465         struct iwl_umac_error_event_table table;
 466         u32 base = mvm->trans->dbg.umac_error_event_table;
 467 
 468         if (!mvm->support_umac_log &&
 469             !(mvm->trans->dbg.error_event_table_tlv_status &
 470               IWL_ERROR_EVENT_TABLE_UMAC))
 471                 return;
 472 
 473         iwl_trans_read_mem_bytes(trans, base, &table, sizeof(table));
 474 
 475         if (table.valid)
 476                 mvm->fwrt.dump.umac_err_id = table.error_id;
 477 
 478         if (ERROR_START_OFFSET <= table.valid * ERROR_ELEM_SIZE) {
 479                 IWL_ERR(trans, "Start IWL Error Log Dump:\n");
 480                 IWL_ERR(trans, "Status: 0x%08lX, count: %d\n",
 481                         mvm->status, table.valid);
 482         }
 483 
 484         IWL_ERR(mvm, "0x%08X | %s\n", table.error_id,
 485                 desc_lookup(table.error_id));
 486         IWL_ERR(mvm, "0x%08X | umac branchlink1\n", table.blink1);
 487         IWL_ERR(mvm, "0x%08X | umac branchlink2\n", table.blink2);
 488         IWL_ERR(mvm, "0x%08X | umac interruptlink1\n", table.ilink1);
 489         IWL_ERR(mvm, "0x%08X | umac interruptlink2\n", table.ilink2);
 490         IWL_ERR(mvm, "0x%08X | umac data1\n", table.data1);
 491         IWL_ERR(mvm, "0x%08X | umac data2\n", table.data2);
 492         IWL_ERR(mvm, "0x%08X | umac data3\n", table.data3);
 493         IWL_ERR(mvm, "0x%08X | umac major\n", table.umac_major);
 494         IWL_ERR(mvm, "0x%08X | umac minor\n", table.umac_minor);
 495         IWL_ERR(mvm, "0x%08X | frame pointer\n", table.frame_pointer);
 496         IWL_ERR(mvm, "0x%08X | stack pointer\n", table.stack_pointer);
 497         IWL_ERR(mvm, "0x%08X | last host cmd\n", table.cmd_header);
 498         IWL_ERR(mvm, "0x%08X | isr status reg\n", table.nic_isr_pref);
 499 }
 500 
 501 static void iwl_mvm_dump_lmac_error_log(struct iwl_mvm *mvm, u8 lmac_num)
 502 {
 503         struct iwl_trans *trans = mvm->trans;
 504         struct iwl_error_event_table table;
 505         u32 val, base = mvm->trans->dbg.lmac_error_event_table[lmac_num];
 506 
 507         if (mvm->fwrt.cur_fw_img == IWL_UCODE_INIT) {
 508                 if (!base)
 509                         base = mvm->fw->init_errlog_ptr;
 510         } else {
 511                 if (!base)
 512                         base = mvm->fw->inst_errlog_ptr;
 513         }
 514 
 515         if (base < 0x400000) {
 516                 IWL_ERR(mvm,
 517                         "Not valid error log pointer 0x%08X for %s uCode\n",
 518                         base,
 519                         (mvm->fwrt.cur_fw_img == IWL_UCODE_INIT)
 520                         ? "Init" : "RT");
 521                 return;
 522         }
 523 
 524         /* check if there is a HW error */
 525         val = iwl_trans_read_mem32(trans, base);
 526         if (((val & ~0xf) == 0xa5a5a5a0) || ((val & ~0xf) == 0x5a5a5a50)) {
 527                 int err;
 528 
 529                 IWL_ERR(trans, "HW error, resetting before reading\n");
 530 
 531                 /* reset the device */
 532                 iwl_trans_sw_reset(trans);
 533 
 534                 err = iwl_finish_nic_init(trans, trans->trans_cfg);
 535                 if (err)
 536                         return;
 537         }
 538 
 539         iwl_trans_read_mem_bytes(trans, base, &table, sizeof(table));
 540 
 541         if (table.valid)
 542                 mvm->fwrt.dump.lmac_err_id[lmac_num] = table.error_id;
 543 
 544         if (ERROR_START_OFFSET <= table.valid * ERROR_ELEM_SIZE) {
 545                 IWL_ERR(trans, "Start IWL Error Log Dump:\n");
 546                 IWL_ERR(trans, "Status: 0x%08lX, count: %d\n",
 547                         mvm->status, table.valid);
 548         }
 549 
 550         /* Do not change this output - scripts rely on it */
 551 
 552         IWL_ERR(mvm, "Loaded firmware version: %s\n", mvm->fw->fw_version);
 553 
 554         IWL_ERR(mvm, "0x%08X | %-28s\n", table.error_id,
 555                 desc_lookup(table.error_id));
 556         IWL_ERR(mvm, "0x%08X | trm_hw_status0\n", table.trm_hw_status0);
 557         IWL_ERR(mvm, "0x%08X | trm_hw_status1\n", table.trm_hw_status1);
 558         IWL_ERR(mvm, "0x%08X | branchlink2\n", table.blink2);
 559         IWL_ERR(mvm, "0x%08X | interruptlink1\n", table.ilink1);
 560         IWL_ERR(mvm, "0x%08X | interruptlink2\n", table.ilink2);
 561         IWL_ERR(mvm, "0x%08X | data1\n", table.data1);
 562         IWL_ERR(mvm, "0x%08X | data2\n", table.data2);
 563         IWL_ERR(mvm, "0x%08X | data3\n", table.data3);
 564         IWL_ERR(mvm, "0x%08X | beacon time\n", table.bcon_time);
 565         IWL_ERR(mvm, "0x%08X | tsf low\n", table.tsf_low);
 566         IWL_ERR(mvm, "0x%08X | tsf hi\n", table.tsf_hi);
 567         IWL_ERR(mvm, "0x%08X | time gp1\n", table.gp1);
 568         IWL_ERR(mvm, "0x%08X | time gp2\n", table.gp2);
 569         IWL_ERR(mvm, "0x%08X | uCode revision type\n", table.fw_rev_type);
 570         IWL_ERR(mvm, "0x%08X | uCode version major\n", table.major);
 571         IWL_ERR(mvm, "0x%08X | uCode version minor\n", table.minor);
 572         IWL_ERR(mvm, "0x%08X | hw version\n", table.hw_ver);
 573         IWL_ERR(mvm, "0x%08X | board version\n", table.brd_ver);
 574         IWL_ERR(mvm, "0x%08X | hcmd\n", table.hcmd);
 575         IWL_ERR(mvm, "0x%08X | isr0\n", table.isr0);
 576         IWL_ERR(mvm, "0x%08X | isr1\n", table.isr1);
 577         IWL_ERR(mvm, "0x%08X | isr2\n", table.isr2);
 578         IWL_ERR(mvm, "0x%08X | isr3\n", table.isr3);
 579         IWL_ERR(mvm, "0x%08X | isr4\n", table.isr4);
 580         IWL_ERR(mvm, "0x%08X | last cmd Id\n", table.last_cmd_id);
 581         IWL_ERR(mvm, "0x%08X | wait_event\n", table.wait_event);
 582         IWL_ERR(mvm, "0x%08X | l2p_control\n", table.l2p_control);
 583         IWL_ERR(mvm, "0x%08X | l2p_duration\n", table.l2p_duration);
 584         IWL_ERR(mvm, "0x%08X | l2p_mhvalid\n", table.l2p_mhvalid);
 585         IWL_ERR(mvm, "0x%08X | l2p_addr_match\n", table.l2p_addr_match);
 586         IWL_ERR(mvm, "0x%08X | lmpm_pmg_sel\n", table.lmpm_pmg_sel);
 587         IWL_ERR(mvm, "0x%08X | timestamp\n", table.u_timestamp);
 588         IWL_ERR(mvm, "0x%08X | flow_handler\n", table.flow_handler);
 589 }
 590 
 591 void iwl_mvm_dump_nic_error_log(struct iwl_mvm *mvm)
 592 {
 593         if (!test_bit(STATUS_DEVICE_ENABLED, &mvm->trans->status)) {
 594                 IWL_ERR(mvm,
 595                         "DEVICE_ENABLED bit is not set. Aborting dump.\n");
 596                 return;
 597         }
 598 
 599         iwl_mvm_dump_lmac_error_log(mvm, 0);
 600 
 601         if (mvm->trans->dbg.lmac_error_event_table[1])
 602                 iwl_mvm_dump_lmac_error_log(mvm, 1);
 603 
 604         iwl_mvm_dump_umac_error_log(mvm);
 605 
 606         iwl_fw_error_print_fseq_regs(&mvm->fwrt);
 607 }
 608 
 609 int iwl_mvm_reconfig_scd(struct iwl_mvm *mvm, int queue, int fifo, int sta_id,
 610                          int tid, int frame_limit, u16 ssn)
 611 {
 612         struct iwl_scd_txq_cfg_cmd cmd = {
 613                 .scd_queue = queue,
 614                 .action = SCD_CFG_ENABLE_QUEUE,
 615                 .window = frame_limit,
 616                 .sta_id = sta_id,
 617                 .ssn = cpu_to_le16(ssn),
 618                 .tx_fifo = fifo,
 619                 .aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
 620                               queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE),
 621                 .tid = tid,
 622         };
 623         int ret;
 624 
 625         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
 626                 return -EINVAL;
 627 
 628         if (WARN(mvm->queue_info[queue].tid_bitmap == 0,
 629                  "Trying to reconfig unallocated queue %d\n", queue))
 630                 return -ENXIO;
 631 
 632         IWL_DEBUG_TX_QUEUES(mvm, "Reconfig SCD for TXQ #%d\n", queue);
 633 
 634         ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd);
 635         WARN_ONCE(ret, "Failed to re-configure queue %d on FIFO %d, ret=%d\n",
 636                   queue, fifo, ret);
 637 
 638         return ret;
 639 }
 640 
 641 /**
 642  * iwl_mvm_send_lq_cmd() - Send link quality command
 643  * @sync: This command can be sent synchronously.
 644  *
 645  * The link quality command is sent as the last step of station creation.
 646  * This is the special case in which init is set and we call a callback in
 647  * this case to clear the state indicating that station creation is in
 648  * progress.
 649  */
 650 int iwl_mvm_send_lq_cmd(struct iwl_mvm *mvm, struct iwl_lq_cmd *lq)
 651 {
 652         struct iwl_host_cmd cmd = {
 653                 .id = LQ_CMD,
 654                 .len = { sizeof(struct iwl_lq_cmd), },
 655                 .flags = CMD_ASYNC,
 656                 .data = { lq, },
 657         };
 658 
 659         if (WARN_ON(lq->sta_id == IWL_MVM_INVALID_STA ||
 660                     iwl_mvm_has_tlc_offload(mvm)))
 661                 return -EINVAL;
 662 
 663         return iwl_mvm_send_cmd(mvm, &cmd);
 664 }
 665 
 666 /**
 667  * iwl_mvm_update_smps - Get a request to change the SMPS mode
 668  * @req_type: The part of the driver who call for a change.
 669  * @smps_requests: The request to change the SMPS mode.
 670  *
 671  * Get a requst to change the SMPS mode,
 672  * and change it according to all other requests in the driver.
 673  */
 674 void iwl_mvm_update_smps(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 675                          enum iwl_mvm_smps_type_request req_type,
 676                          enum ieee80211_smps_mode smps_request)
 677 {
 678         struct iwl_mvm_vif *mvmvif;
 679         enum ieee80211_smps_mode smps_mode;
 680         int i;
 681 
 682         lockdep_assert_held(&mvm->mutex);
 683 
 684         /* SMPS is irrelevant for NICs that don't have at least 2 RX antenna */
 685         if (num_of_ant(iwl_mvm_get_valid_rx_ant(mvm)) == 1)
 686                 return;
 687 
 688         if (vif->type == NL80211_IFTYPE_AP)
 689                 smps_mode = IEEE80211_SMPS_OFF;
 690         else
 691                 smps_mode = IEEE80211_SMPS_AUTOMATIC;
 692 
 693         mvmvif = iwl_mvm_vif_from_mac80211(vif);
 694         mvmvif->smps_requests[req_type] = smps_request;
 695         for (i = 0; i < NUM_IWL_MVM_SMPS_REQ; i++) {
 696                 if (mvmvif->smps_requests[i] == IEEE80211_SMPS_STATIC) {
 697                         smps_mode = IEEE80211_SMPS_STATIC;
 698                         break;
 699                 }
 700                 if (mvmvif->smps_requests[i] == IEEE80211_SMPS_DYNAMIC)
 701                         smps_mode = IEEE80211_SMPS_DYNAMIC;
 702         }
 703 
 704         ieee80211_request_smps(vif, smps_mode);
 705 }
 706 
 707 int iwl_mvm_request_statistics(struct iwl_mvm *mvm, bool clear)
 708 {
 709         struct iwl_statistics_cmd scmd = {
 710                 .flags = clear ? cpu_to_le32(IWL_STATISTICS_FLG_CLEAR) : 0,
 711         };
 712         struct iwl_host_cmd cmd = {
 713                 .id = STATISTICS_CMD,
 714                 .len[0] = sizeof(scmd),
 715                 .data[0] = &scmd,
 716                 .flags = CMD_WANT_SKB,
 717         };
 718         int ret;
 719 
 720         ret = iwl_mvm_send_cmd(mvm, &cmd);
 721         if (ret)
 722                 return ret;
 723 
 724         iwl_mvm_handle_rx_statistics(mvm, cmd.resp_pkt);
 725         iwl_free_resp(&cmd);
 726 
 727         if (clear)
 728                 iwl_mvm_accu_radio_stats(mvm);
 729 
 730         return 0;
 731 }
 732 
 733 void iwl_mvm_accu_radio_stats(struct iwl_mvm *mvm)
 734 {
 735         mvm->accu_radio_stats.rx_time += mvm->radio_stats.rx_time;
 736         mvm->accu_radio_stats.tx_time += mvm->radio_stats.tx_time;
 737         mvm->accu_radio_stats.on_time_rf += mvm->radio_stats.on_time_rf;
 738         mvm->accu_radio_stats.on_time_scan += mvm->radio_stats.on_time_scan;
 739 }
 740 
 741 static void iwl_mvm_diversity_iter(void *_data, u8 *mac,
 742                                    struct ieee80211_vif *vif)
 743 {
 744         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 745         bool *result = _data;
 746         int i;
 747 
 748         for (i = 0; i < NUM_IWL_MVM_SMPS_REQ; i++) {
 749                 if (mvmvif->smps_requests[i] == IEEE80211_SMPS_STATIC ||
 750                     mvmvif->smps_requests[i] == IEEE80211_SMPS_DYNAMIC)
 751                         *result = false;
 752         }
 753 }
 754 
 755 bool iwl_mvm_rx_diversity_allowed(struct iwl_mvm *mvm)
 756 {
 757         bool result = true;
 758 
 759         lockdep_assert_held(&mvm->mutex);
 760 
 761         if (num_of_ant(iwl_mvm_get_valid_rx_ant(mvm)) == 1)
 762                 return false;
 763 
 764         if (mvm->cfg->rx_with_siso_diversity)
 765                 return false;
 766 
 767         ieee80211_iterate_active_interfaces_atomic(
 768                         mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
 769                         iwl_mvm_diversity_iter, &result);
 770 
 771         return result;
 772 }
 773 
 774 void iwl_mvm_send_low_latency_cmd(struct iwl_mvm *mvm,
 775                                   bool low_latency, u16 mac_id)
 776 {
 777         struct iwl_mac_low_latency_cmd cmd = {
 778                 .mac_id = cpu_to_le32(mac_id)
 779         };
 780 
 781         if (!fw_has_capa(&mvm->fw->ucode_capa,
 782                          IWL_UCODE_TLV_CAPA_DYNAMIC_QUOTA))
 783                 return;
 784 
 785         if (low_latency) {
 786                 /* currently we don't care about the direction */
 787                 cmd.low_latency_rx = 1;
 788                 cmd.low_latency_tx = 1;
 789         }
 790 
 791         if (iwl_mvm_send_cmd_pdu(mvm, iwl_cmd_id(LOW_LATENCY_CMD,
 792                                                  MAC_CONF_GROUP, 0),
 793                                  0, sizeof(cmd), &cmd))
 794                 IWL_ERR(mvm, "Failed to send low latency command\n");
 795 }
 796 
 797 int iwl_mvm_update_low_latency(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 798                                bool low_latency,
 799                                enum iwl_mvm_low_latency_cause cause)
 800 {
 801         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 802         int res;
 803         bool prev;
 804 
 805         lockdep_assert_held(&mvm->mutex);
 806 
 807         prev = iwl_mvm_vif_low_latency(mvmvif);
 808         iwl_mvm_vif_set_low_latency(mvmvif, low_latency, cause);
 809 
 810         low_latency = iwl_mvm_vif_low_latency(mvmvif);
 811 
 812         if (low_latency == prev)
 813                 return 0;
 814 
 815         iwl_mvm_send_low_latency_cmd(mvm, low_latency, mvmvif->id);
 816 
 817         res = iwl_mvm_update_quotas(mvm, false, NULL);
 818         if (res)
 819                 return res;
 820 
 821         iwl_mvm_bt_coex_vif_change(mvm);
 822 
 823         return iwl_mvm_power_update_mac(mvm);
 824 }
 825 
 826 struct iwl_mvm_low_latency_iter {
 827         bool result;
 828         bool result_per_band[NUM_NL80211_BANDS];
 829 };
 830 
 831 static void iwl_mvm_ll_iter(void *_data, u8 *mac, struct ieee80211_vif *vif)
 832 {
 833         struct iwl_mvm_low_latency_iter *result = _data;
 834         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 835         enum nl80211_band band;
 836 
 837         if (iwl_mvm_vif_low_latency(mvmvif)) {
 838                 result->result = true;
 839 
 840                 if (!mvmvif->phy_ctxt)
 841                         return;
 842 
 843                 band = mvmvif->phy_ctxt->channel->band;
 844                 result->result_per_band[band] = true;
 845         }
 846 }
 847 
 848 bool iwl_mvm_low_latency(struct iwl_mvm *mvm)
 849 {
 850         struct iwl_mvm_low_latency_iter data = {};
 851 
 852         ieee80211_iterate_active_interfaces_atomic(
 853                         mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
 854                         iwl_mvm_ll_iter, &data);
 855 
 856         return data.result;
 857 }
 858 
 859 bool iwl_mvm_low_latency_band(struct iwl_mvm *mvm, enum nl80211_band band)
 860 {
 861         struct iwl_mvm_low_latency_iter data = {};
 862 
 863         ieee80211_iterate_active_interfaces_atomic(
 864                         mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
 865                         iwl_mvm_ll_iter, &data);
 866 
 867         return data.result_per_band[band];
 868 }
 869 
 870 struct iwl_bss_iter_data {
 871         struct ieee80211_vif *vif;
 872         bool error;
 873 };
 874 
 875 static void iwl_mvm_bss_iface_iterator(void *_data, u8 *mac,
 876                                        struct ieee80211_vif *vif)
 877 {
 878         struct iwl_bss_iter_data *data = _data;
 879 
 880         if (vif->type != NL80211_IFTYPE_STATION || vif->p2p)
 881                 return;
 882 
 883         if (data->vif) {
 884                 data->error = true;
 885                 return;
 886         }
 887 
 888         data->vif = vif;
 889 }
 890 
 891 struct ieee80211_vif *iwl_mvm_get_bss_vif(struct iwl_mvm *mvm)
 892 {
 893         struct iwl_bss_iter_data bss_iter_data = {};
 894 
 895         ieee80211_iterate_active_interfaces_atomic(
 896                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
 897                 iwl_mvm_bss_iface_iterator, &bss_iter_data);
 898 
 899         if (bss_iter_data.error) {
 900                 IWL_ERR(mvm, "More than one managed interface active!\n");
 901                 return ERR_PTR(-EINVAL);
 902         }
 903 
 904         return bss_iter_data.vif;
 905 }
 906 
 907 struct iwl_sta_iter_data {
 908         bool assoc;
 909 };
 910 
 911 static void iwl_mvm_sta_iface_iterator(void *_data, u8 *mac,
 912                                        struct ieee80211_vif *vif)
 913 {
 914         struct iwl_sta_iter_data *data = _data;
 915 
 916         if (vif->type != NL80211_IFTYPE_STATION)
 917                 return;
 918 
 919         if (vif->bss_conf.assoc)
 920                 data->assoc = true;
 921 }
 922 
 923 bool iwl_mvm_is_vif_assoc(struct iwl_mvm *mvm)
 924 {
 925         struct iwl_sta_iter_data data = {
 926                 .assoc = false,
 927         };
 928 
 929         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
 930                                                    IEEE80211_IFACE_ITER_NORMAL,
 931                                                    iwl_mvm_sta_iface_iterator,
 932                                                    &data);
 933         return data.assoc;
 934 }
 935 
 936 unsigned int iwl_mvm_get_wd_timeout(struct iwl_mvm *mvm,
 937                                     struct ieee80211_vif *vif,
 938                                     bool tdls, bool cmd_q)
 939 {
 940         struct iwl_fw_dbg_trigger_tlv *trigger;
 941         struct iwl_fw_dbg_trigger_txq_timer *txq_timer;
 942         unsigned int default_timeout = cmd_q ?
 943                 IWL_DEF_WD_TIMEOUT :
 944                 mvm->trans->trans_cfg->base_params->wd_timeout;
 945 
 946         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_TXQ_TIMERS)) {
 947                 /*
 948                  * We can't know when the station is asleep or awake, so we
 949                  * must disable the queue hang detection.
 950                  */
 951                 if (fw_has_capa(&mvm->fw->ucode_capa,
 952                                 IWL_UCODE_TLV_CAPA_STA_PM_NOTIF) &&
 953                     vif && vif->type == NL80211_IFTYPE_AP)
 954                         return IWL_WATCHDOG_DISABLED;
 955                 return iwlmvm_mod_params.tfd_q_hang_detect ?
 956                         default_timeout : IWL_WATCHDOG_DISABLED;
 957         }
 958 
 959         trigger = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_TXQ_TIMERS);
 960         txq_timer = (void *)trigger->data;
 961 
 962         if (tdls)
 963                 return le32_to_cpu(txq_timer->tdls);
 964 
 965         if (cmd_q)
 966                 return le32_to_cpu(txq_timer->command_queue);
 967 
 968         if (WARN_ON(!vif))
 969                 return default_timeout;
 970 
 971         switch (ieee80211_vif_type_p2p(vif)) {
 972         case NL80211_IFTYPE_ADHOC:
 973                 return le32_to_cpu(txq_timer->ibss);
 974         case NL80211_IFTYPE_STATION:
 975                 return le32_to_cpu(txq_timer->bss);
 976         case NL80211_IFTYPE_AP:
 977                 return le32_to_cpu(txq_timer->softap);
 978         case NL80211_IFTYPE_P2P_CLIENT:
 979                 return le32_to_cpu(txq_timer->p2p_client);
 980         case NL80211_IFTYPE_P2P_GO:
 981                 return le32_to_cpu(txq_timer->p2p_go);
 982         case NL80211_IFTYPE_P2P_DEVICE:
 983                 return le32_to_cpu(txq_timer->p2p_device);
 984         case NL80211_IFTYPE_MONITOR:
 985                 return default_timeout;
 986         default:
 987                 WARN_ON(1);
 988                 return mvm->trans->trans_cfg->base_params->wd_timeout;
 989         }
 990 }
 991 
 992 void iwl_mvm_connection_loss(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 993                              const char *errmsg)
 994 {
 995         struct iwl_fw_dbg_trigger_tlv *trig;
 996         struct iwl_fw_dbg_trigger_mlme *trig_mlme;
 997 
 998         trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, ieee80211_vif_to_wdev(vif),
 999                                      FW_DBG_TRIGGER_MLME);
1000         if (!trig)
1001                 goto out;
1002 
1003         trig_mlme = (void *)trig->data;
1004 
1005         if (trig_mlme->stop_connection_loss &&
1006             --trig_mlme->stop_connection_loss)
1007                 goto out;
1008 
1009         iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, "%s", errmsg);
1010 
1011 out:
1012         ieee80211_connection_loss(vif);
1013 }
1014 
1015 void iwl_mvm_event_frame_timeout_callback(struct iwl_mvm *mvm,
1016                                           struct ieee80211_vif *vif,
1017                                           const struct ieee80211_sta *sta,
1018                                           u16 tid)
1019 {
1020         struct iwl_fw_dbg_trigger_tlv *trig;
1021         struct iwl_fw_dbg_trigger_ba *ba_trig;
1022 
1023         trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, ieee80211_vif_to_wdev(vif),
1024                                      FW_DBG_TRIGGER_BA);
1025         if (!trig)
1026                 return;
1027 
1028         ba_trig = (void *)trig->data;
1029 
1030         if (!(le16_to_cpu(ba_trig->frame_timeout) & BIT(tid)))
1031                 return;
1032 
1033         iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
1034                                 "Frame from %pM timed out, tid %d",
1035                                 sta->addr, tid);
1036 }
1037 
1038 u8 iwl_mvm_tcm_load_percentage(u32 airtime, u32 elapsed)
1039 {
1040         if (!elapsed)
1041                 return 0;
1042 
1043         return (100 * airtime / elapsed) / USEC_PER_MSEC;
1044 }
1045 
1046 static enum iwl_mvm_traffic_load
1047 iwl_mvm_tcm_load(struct iwl_mvm *mvm, u32 airtime, unsigned long elapsed)
1048 {
1049         u8 load = iwl_mvm_tcm_load_percentage(airtime, elapsed);
1050 
1051         if (load > IWL_MVM_TCM_LOAD_HIGH_THRESH)
1052                 return IWL_MVM_TRAFFIC_HIGH;
1053         if (load > IWL_MVM_TCM_LOAD_MEDIUM_THRESH)
1054                 return IWL_MVM_TRAFFIC_MEDIUM;
1055 
1056         return IWL_MVM_TRAFFIC_LOW;
1057 }
1058 
1059 struct iwl_mvm_tcm_iter_data {
1060         struct iwl_mvm *mvm;
1061         bool any_sent;
1062 };
1063 
1064 static void iwl_mvm_tcm_iter(void *_data, u8 *mac, struct ieee80211_vif *vif)
1065 {
1066         struct iwl_mvm_tcm_iter_data *data = _data;
1067         struct iwl_mvm *mvm = data->mvm;
1068         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1069         bool low_latency, prev = mvmvif->low_latency & LOW_LATENCY_TRAFFIC;
1070 
1071         if (mvmvif->id >= NUM_MAC_INDEX_DRIVER)
1072                 return;
1073 
1074         low_latency = mvm->tcm.result.low_latency[mvmvif->id];
1075 
1076         if (!mvm->tcm.result.change[mvmvif->id] &&
1077             prev == low_latency) {
1078                 iwl_mvm_update_quotas(mvm, false, NULL);
1079                 return;
1080         }
1081 
1082         if (prev != low_latency) {
1083                 /* this sends traffic load and updates quota as well */
1084                 iwl_mvm_update_low_latency(mvm, vif, low_latency,
1085                                            LOW_LATENCY_TRAFFIC);
1086         } else {
1087                 iwl_mvm_update_quotas(mvm, false, NULL);
1088         }
1089 
1090         data->any_sent = true;
1091 }
1092 
1093 static void iwl_mvm_tcm_results(struct iwl_mvm *mvm)
1094 {
1095         struct iwl_mvm_tcm_iter_data data = {
1096                 .mvm = mvm,
1097                 .any_sent = false,
1098         };
1099 
1100         mutex_lock(&mvm->mutex);
1101 
1102         ieee80211_iterate_active_interfaces(
1103                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1104                 iwl_mvm_tcm_iter, &data);
1105 
1106         if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN))
1107                 iwl_mvm_config_scan(mvm);
1108 
1109         mutex_unlock(&mvm->mutex);
1110 }
1111 
1112 static void iwl_mvm_tcm_uapsd_nonagg_detected_wk(struct work_struct *wk)
1113 {
1114         struct iwl_mvm *mvm;
1115         struct iwl_mvm_vif *mvmvif;
1116         struct ieee80211_vif *vif;
1117 
1118         mvmvif = container_of(wk, struct iwl_mvm_vif,
1119                               uapsd_nonagg_detected_wk.work);
1120         vif = container_of((void *)mvmvif, struct ieee80211_vif, drv_priv);
1121         mvm = mvmvif->mvm;
1122 
1123         if (mvm->tcm.data[mvmvif->id].opened_rx_ba_sessions)
1124                 return;
1125 
1126         /* remember that this AP is broken */
1127         memcpy(mvm->uapsd_noagg_bssids[mvm->uapsd_noagg_bssid_write_idx].addr,
1128                vif->bss_conf.bssid, ETH_ALEN);
1129         mvm->uapsd_noagg_bssid_write_idx++;
1130         if (mvm->uapsd_noagg_bssid_write_idx >= IWL_MVM_UAPSD_NOAGG_LIST_LEN)
1131                 mvm->uapsd_noagg_bssid_write_idx = 0;
1132 
1133         iwl_mvm_connection_loss(mvm, vif,
1134                                 "AP isn't using AMPDU with uAPSD enabled");
1135 }
1136 
1137 static void iwl_mvm_uapsd_agg_disconnect(struct iwl_mvm *mvm,
1138                                          struct ieee80211_vif *vif)
1139 {
1140         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1141 
1142         if (vif->type != NL80211_IFTYPE_STATION)
1143                 return;
1144 
1145         if (!vif->bss_conf.assoc)
1146                 return;
1147 
1148         if (!mvmvif->queue_params[IEEE80211_AC_VO].uapsd &&
1149             !mvmvif->queue_params[IEEE80211_AC_VI].uapsd &&
1150             !mvmvif->queue_params[IEEE80211_AC_BE].uapsd &&
1151             !mvmvif->queue_params[IEEE80211_AC_BK].uapsd)
1152                 return;
1153 
1154         if (mvm->tcm.data[mvmvif->id].uapsd_nonagg_detect.detected)
1155                 return;
1156 
1157         mvm->tcm.data[mvmvif->id].uapsd_nonagg_detect.detected = true;
1158         IWL_INFO(mvm,
1159                  "detected AP should do aggregation but isn't, likely due to U-APSD\n");
1160         schedule_delayed_work(&mvmvif->uapsd_nonagg_detected_wk, 15 * HZ);
1161 }
1162 
1163 static void iwl_mvm_check_uapsd_agg_expected_tpt(struct iwl_mvm *mvm,
1164                                                  unsigned int elapsed,
1165                                                  int mac)
1166 {
1167         u64 bytes = mvm->tcm.data[mac].uapsd_nonagg_detect.rx_bytes;
1168         u64 tpt;
1169         unsigned long rate;
1170         struct ieee80211_vif *vif;
1171 
1172         rate = ewma_rate_read(&mvm->tcm.data[mac].uapsd_nonagg_detect.rate);
1173 
1174         if (!rate || mvm->tcm.data[mac].opened_rx_ba_sessions ||
1175             mvm->tcm.data[mac].uapsd_nonagg_detect.detected)
1176                 return;
1177 
1178         if (iwl_mvm_has_new_rx_api(mvm)) {
1179                 tpt = 8 * bytes; /* kbps */
1180                 do_div(tpt, elapsed);
1181                 rate *= 1000; /* kbps */
1182                 if (tpt < 22 * rate / 100)
1183                         return;
1184         } else {
1185                 /*
1186                  * the rate here is actually the threshold, in 100Kbps units,
1187                  * so do the needed conversion from bytes to 100Kbps:
1188                  * 100kb = bits / (100 * 1000),
1189                  * 100kbps = 100kb / (msecs / 1000) ==
1190                  *           (bits / (100 * 1000)) / (msecs / 1000) ==
1191                  *           bits / (100 * msecs)
1192                  */
1193                 tpt = (8 * bytes);
1194                 do_div(tpt, elapsed * 100);
1195                 if (tpt < rate)
1196                         return;
1197         }
1198 
1199         rcu_read_lock();
1200         vif = rcu_dereference(mvm->vif_id_to_mac[mac]);
1201         if (vif)
1202                 iwl_mvm_uapsd_agg_disconnect(mvm, vif);
1203         rcu_read_unlock();
1204 }
1205 
1206 static void iwl_mvm_tcm_iterator(void *_data, u8 *mac,
1207                                  struct ieee80211_vif *vif)
1208 {
1209         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1210         u32 *band = _data;
1211 
1212         if (!mvmvif->phy_ctxt)
1213                 return;
1214 
1215         band[mvmvif->id] = mvmvif->phy_ctxt->channel->band;
1216 }
1217 
1218 static unsigned long iwl_mvm_calc_tcm_stats(struct iwl_mvm *mvm,
1219                                             unsigned long ts,
1220                                             bool handle_uapsd)
1221 {
1222         unsigned int elapsed = jiffies_to_msecs(ts - mvm->tcm.ts);
1223         unsigned int uapsd_elapsed =
1224                 jiffies_to_msecs(ts - mvm->tcm.uapsd_nonagg_ts);
1225         u32 total_airtime = 0;
1226         u32 band_airtime[NUM_NL80211_BANDS] = {0};
1227         u32 band[NUM_MAC_INDEX_DRIVER] = {0};
1228         int ac, mac, i;
1229         bool low_latency = false;
1230         enum iwl_mvm_traffic_load load, band_load;
1231         bool handle_ll = time_after(ts, mvm->tcm.ll_ts + MVM_LL_PERIOD);
1232 
1233         if (handle_ll)
1234                 mvm->tcm.ll_ts = ts;
1235         if (handle_uapsd)
1236                 mvm->tcm.uapsd_nonagg_ts = ts;
1237 
1238         mvm->tcm.result.elapsed = elapsed;
1239 
1240         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1241                                                    IEEE80211_IFACE_ITER_NORMAL,
1242                                                    iwl_mvm_tcm_iterator,
1243                                                    &band);
1244 
1245         for (mac = 0; mac < NUM_MAC_INDEX_DRIVER; mac++) {
1246                 struct iwl_mvm_tcm_mac *mdata = &mvm->tcm.data[mac];
1247                 u32 vo_vi_pkts = 0;
1248                 u32 airtime = mdata->rx.airtime + mdata->tx.airtime;
1249 
1250                 total_airtime += airtime;
1251                 band_airtime[band[mac]] += airtime;
1252 
1253                 load = iwl_mvm_tcm_load(mvm, airtime, elapsed);
1254                 mvm->tcm.result.change[mac] = load != mvm->tcm.result.load[mac];
1255                 mvm->tcm.result.load[mac] = load;
1256                 mvm->tcm.result.airtime[mac] = airtime;
1257 
1258                 for (ac = IEEE80211_AC_VO; ac <= IEEE80211_AC_VI; ac++)
1259                         vo_vi_pkts += mdata->rx.pkts[ac] +
1260                                       mdata->tx.pkts[ac];
1261 
1262                 /* enable immediately with enough packets but defer disabling */
1263                 if (vo_vi_pkts > IWL_MVM_TCM_LOWLAT_ENABLE_THRESH)
1264                         mvm->tcm.result.low_latency[mac] = true;
1265                 else if (handle_ll)
1266                         mvm->tcm.result.low_latency[mac] = false;
1267 
1268                 if (handle_ll) {
1269                         /* clear old data */
1270                         memset(&mdata->rx.pkts, 0, sizeof(mdata->rx.pkts));
1271                         memset(&mdata->tx.pkts, 0, sizeof(mdata->tx.pkts));
1272                 }
1273                 low_latency |= mvm->tcm.result.low_latency[mac];
1274 
1275                 if (!mvm->tcm.result.low_latency[mac] && handle_uapsd)
1276                         iwl_mvm_check_uapsd_agg_expected_tpt(mvm, uapsd_elapsed,
1277                                                              mac);
1278                 /* clear old data */
1279                 if (handle_uapsd)
1280                         mdata->uapsd_nonagg_detect.rx_bytes = 0;
1281                 memset(&mdata->rx.airtime, 0, sizeof(mdata->rx.airtime));
1282                 memset(&mdata->tx.airtime, 0, sizeof(mdata->tx.airtime));
1283         }
1284 
1285         load = iwl_mvm_tcm_load(mvm, total_airtime, elapsed);
1286         mvm->tcm.result.global_change = load != mvm->tcm.result.global_load;
1287         mvm->tcm.result.global_load = load;
1288 
1289         for (i = 0; i < NUM_NL80211_BANDS; i++) {
1290                 band_load = iwl_mvm_tcm_load(mvm, band_airtime[i], elapsed);
1291                 mvm->tcm.result.band_load[i] = band_load;
1292         }
1293 
1294         /*
1295          * If the current load isn't low we need to force re-evaluation
1296          * in the TCM period, so that we can return to low load if there
1297          * was no traffic at all (and thus iwl_mvm_recalc_tcm didn't get
1298          * triggered by traffic).
1299          */
1300         if (load != IWL_MVM_TRAFFIC_LOW)
1301                 return MVM_TCM_PERIOD;
1302         /*
1303          * If low-latency is active we need to force re-evaluation after
1304          * (the longer) MVM_LL_PERIOD, so that we can disable low-latency
1305          * when there's no traffic at all.
1306          */
1307         if (low_latency)
1308                 return MVM_LL_PERIOD;
1309         /*
1310          * Otherwise, we don't need to run the work struct because we're
1311          * in the default "idle" state - traffic indication is low (which
1312          * also covers the "no traffic" case) and low-latency is disabled
1313          * so there's no state that may need to be disabled when there's
1314          * no traffic at all.
1315          *
1316          * Note that this has no impact on the regular scheduling of the
1317          * updates triggered by traffic - those happen whenever one of the
1318          * two timeouts expire (if there's traffic at all.)
1319          */
1320         return 0;
1321 }
1322 
1323 void iwl_mvm_recalc_tcm(struct iwl_mvm *mvm)
1324 {
1325         unsigned long ts = jiffies;
1326         bool handle_uapsd =
1327                 time_after(ts, mvm->tcm.uapsd_nonagg_ts +
1328                                msecs_to_jiffies(IWL_MVM_UAPSD_NONAGG_PERIOD));
1329 
1330         spin_lock(&mvm->tcm.lock);
1331         if (mvm->tcm.paused || !time_after(ts, mvm->tcm.ts + MVM_TCM_PERIOD)) {
1332                 spin_unlock(&mvm->tcm.lock);
1333                 return;
1334         }
1335         spin_unlock(&mvm->tcm.lock);
1336 
1337         if (handle_uapsd && iwl_mvm_has_new_rx_api(mvm)) {
1338                 mutex_lock(&mvm->mutex);
1339                 if (iwl_mvm_request_statistics(mvm, true))
1340                         handle_uapsd = false;
1341                 mutex_unlock(&mvm->mutex);
1342         }
1343 
1344         spin_lock(&mvm->tcm.lock);
1345         /* re-check if somebody else won the recheck race */
1346         if (!mvm->tcm.paused && time_after(ts, mvm->tcm.ts + MVM_TCM_PERIOD)) {
1347                 /* calculate statistics */
1348                 unsigned long work_delay = iwl_mvm_calc_tcm_stats(mvm, ts,
1349                                                                   handle_uapsd);
1350 
1351                 /* the memset needs to be visible before the timestamp */
1352                 smp_mb();
1353                 mvm->tcm.ts = ts;
1354                 if (work_delay)
1355                         schedule_delayed_work(&mvm->tcm.work, work_delay);
1356         }
1357         spin_unlock(&mvm->tcm.lock);
1358 
1359         iwl_mvm_tcm_results(mvm);
1360 }
1361 
1362 void iwl_mvm_tcm_work(struct work_struct *work)
1363 {
1364         struct delayed_work *delayed_work = to_delayed_work(work);
1365         struct iwl_mvm *mvm = container_of(delayed_work, struct iwl_mvm,
1366                                            tcm.work);
1367 
1368         iwl_mvm_recalc_tcm(mvm);
1369 }
1370 
1371 void iwl_mvm_pause_tcm(struct iwl_mvm *mvm, bool with_cancel)
1372 {
1373         spin_lock_bh(&mvm->tcm.lock);
1374         mvm->tcm.paused = true;
1375         spin_unlock_bh(&mvm->tcm.lock);
1376         if (with_cancel)
1377                 cancel_delayed_work_sync(&mvm->tcm.work);
1378 }
1379 
1380 void iwl_mvm_resume_tcm(struct iwl_mvm *mvm)
1381 {
1382         int mac;
1383         bool low_latency = false;
1384 
1385         spin_lock_bh(&mvm->tcm.lock);
1386         mvm->tcm.ts = jiffies;
1387         mvm->tcm.ll_ts = jiffies;
1388         for (mac = 0; mac < NUM_MAC_INDEX_DRIVER; mac++) {
1389                 struct iwl_mvm_tcm_mac *mdata = &mvm->tcm.data[mac];
1390 
1391                 memset(&mdata->rx.pkts, 0, sizeof(mdata->rx.pkts));
1392                 memset(&mdata->tx.pkts, 0, sizeof(mdata->tx.pkts));
1393                 memset(&mdata->rx.airtime, 0, sizeof(mdata->rx.airtime));
1394                 memset(&mdata->tx.airtime, 0, sizeof(mdata->tx.airtime));
1395 
1396                 if (mvm->tcm.result.low_latency[mac])
1397                         low_latency = true;
1398         }
1399         /* The TCM data needs to be reset before "paused" flag changes */
1400         smp_mb();
1401         mvm->tcm.paused = false;
1402 
1403         /*
1404          * if the current load is not low or low latency is active, force
1405          * re-evaluation to cover the case of no traffic.
1406          */
1407         if (mvm->tcm.result.global_load > IWL_MVM_TRAFFIC_LOW)
1408                 schedule_delayed_work(&mvm->tcm.work, MVM_TCM_PERIOD);
1409         else if (low_latency)
1410                 schedule_delayed_work(&mvm->tcm.work, MVM_LL_PERIOD);
1411 
1412         spin_unlock_bh(&mvm->tcm.lock);
1413 }
1414 
1415 void iwl_mvm_tcm_add_vif(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1416 {
1417         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1418 
1419         INIT_DELAYED_WORK(&mvmvif->uapsd_nonagg_detected_wk,
1420                           iwl_mvm_tcm_uapsd_nonagg_detected_wk);
1421 }
1422 
1423 void iwl_mvm_tcm_rm_vif(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1424 {
1425         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1426 
1427         cancel_delayed_work_sync(&mvmvif->uapsd_nonagg_detected_wk);
1428 }
1429 
1430 u32 iwl_mvm_get_systime(struct iwl_mvm *mvm)
1431 {
1432         u32 reg_addr = DEVICE_SYSTEM_TIME_REG;
1433 
1434         if (mvm->trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_22000 &&
1435             mvm->trans->cfg->gp2_reg_addr)
1436                 reg_addr = mvm->trans->cfg->gp2_reg_addr;
1437 
1438         return iwl_read_prph(mvm->trans, reg_addr);
1439 }
1440 
1441 void iwl_mvm_get_sync_time(struct iwl_mvm *mvm, u32 *gp2, u64 *boottime)
1442 {
1443         bool ps_disabled;
1444 
1445         lockdep_assert_held(&mvm->mutex);
1446 
1447         /* Disable power save when reading GP2 */
1448         ps_disabled = mvm->ps_disabled;
1449         if (!ps_disabled) {
1450                 mvm->ps_disabled = true;
1451                 iwl_mvm_power_update_device(mvm);
1452         }
1453 
1454         *gp2 = iwl_mvm_get_systime(mvm);
1455         *boottime = ktime_get_boottime_ns();
1456 
1457         if (!ps_disabled) {
1458                 mvm->ps_disabled = ps_disabled;
1459                 iwl_mvm_power_update_device(mvm);
1460         }
1461 }
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/net/wireless/intel/iwlwifi/mvm/utils.c

DEFINITIONS
