drivers/net/wireless/intel/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  * 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
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  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  20  * General Public License for more details.
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  28  * in the file called COPYING.
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  30  * Contact Information:
  31  *  Intel Linux Wireless <linuxwifi@intel.com>
  32  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  33  *
  34  * BSD LICENSE
  35  *
  36  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  37  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
  38  * Copyright (C) 2015 - 2017 Intel Deutschland GmbH
  39  * Copyright(c) 2018 Intel Corporation
  40  * All rights reserved.
  41  *
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  43  * modification, are permitted provided that the following conditions
  44  * are met:
  45  *
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  50  *    the documentation and/or other materials provided with the
  51  *    distribution.
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  53  *    contributors may be used to endorse or promote products derived
  54  *    from this software without specific prior written permission.
  55  *
  56  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  57  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  58  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  59  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  60  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  61  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  62  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  63  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  64  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  65  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  66  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  67  *
  68  *****************************************************************************/
  69 #include <net/mac80211.h>
  70
  71 #include "iwl-debug.h"
  72 #include "iwl-io.h"
  73 #include "iwl-prph.h"
  74 #include "iwl-csr.h"
  75 #include "mvm.h"
  76 #include "fw/api/rs.h"
  77
  78 /*
  79  * Will return 0 even if the cmd failed when RFKILL is asserted unless
  80  * CMD_WANT_SKB is set in cmd->flags.
  81  */
  82 int iwl_mvm_send_cmd(struct iwl_mvm *mvm, struct iwl_host_cmd *cmd)
  83 {
  84         int ret;
  85
  86 #if defined(CONFIG_IWLWIFI_DEBUGFS) && defined(CONFIG_PM_SLEEP)
  87         if (WARN_ON(mvm->d3_test_active))
  88                 return -EIO;
  89 #endif
  90
  91         /*
  92          * Synchronous commands from this op-mode must hold
  93          * the mutex, this ensures we don't try to send two
  94          * (or more) synchronous commands at a time.
  95          */
  96         if (!(cmd->flags & CMD_ASYNC)) {
  97                 lockdep_assert_held(&mvm->mutex);
  98                 if (!(cmd->flags & CMD_SEND_IN_IDLE))
  99                         iwl_mvm_ref(mvm, IWL_MVM_REF_SENDING_CMD);
 100         }
 101
 102         ret = iwl_trans_send_cmd(mvm->trans, cmd);
 103
 104         if (!(cmd->flags & (CMD_ASYNC | CMD_SEND_IN_IDLE)))
 105                 iwl_mvm_unref(mvm, IWL_MVM_REF_SENDING_CMD);
 106
 107         /*
 108          * If the caller wants the SKB, then don't hide any problems, the
 109          * caller might access the response buffer which will be NULL if
 110          * the command failed.
 111          */
 112         if (cmd->flags & CMD_WANT_SKB)
 113                 return ret;
 114
 115         /* Silently ignore failures if RFKILL is asserted */
 116         if (!ret || ret == -ERFKILL)
 117                 return 0;
 118         return ret;
 119 }
 120
 121 int iwl_mvm_send_cmd_pdu(struct iwl_mvm *mvm, u32 id,
 122                          u32 flags, u16 len, const void *data)
 123 {
 124         struct iwl_host_cmd cmd = {
 125                 .id = id,
 126                 .len = { len, },
 127                 .data = { data, },
 128                 .flags = flags,
 129         };
 130
 131         return iwl_mvm_send_cmd(mvm, &cmd);
 132 }
 133
 134 /*
 135  * We assume that the caller set the status to the success value
 136  */
 137 int iwl_mvm_send_cmd_status(struct iwl_mvm *mvm, struct iwl_host_cmd *cmd,
 138                             u32 *status)
 139 {
 140         struct iwl_rx_packet *pkt;
 141         struct iwl_cmd_response *resp;
 142         int ret, resp_len;
 143
 144         lockdep_assert_held(&mvm->mutex);
 145
 146 #if defined(CONFIG_IWLWIFI_DEBUGFS) && defined(CONFIG_PM_SLEEP)
 147         if (WARN_ON(mvm->d3_test_active))
 148                 return -EIO;
 149 #endif
 150
 151         /*
 152          * Only synchronous commands can wait for status,
 153          * we use WANT_SKB so the caller can't.
 154          */
 155         if (WARN_ONCE(cmd->flags & (CMD_ASYNC | CMD_WANT_SKB),
 156                       "cmd flags %x", cmd->flags))
 157                 return -EINVAL;
 158
 159         cmd->flags |= CMD_WANT_SKB;
 160
 161         ret = iwl_trans_send_cmd(mvm->trans, cmd);
 162         if (ret == -ERFKILL) {
 163                 /*
 164                  * The command failed because of RFKILL, don't update
 165                  * the status, leave it as success and return 0.
 166                  */
 167                 return 0;
 168         } else if (ret) {
 169                 return ret;
 170         }
 171
 172         pkt = cmd->resp_pkt;
 173
 174         resp_len = iwl_rx_packet_payload_len(pkt);
 175         if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
 176                 ret = -EIO;
 177                 goto out_free_resp;
 178         }
 179
 180         resp = (void *)pkt->data;
 181         *status = le32_to_cpu(resp->status);
 182  out_free_resp:
 183         iwl_free_resp(cmd);
 184         return ret;
 185 }
 186
 187 /*
 188  * We assume that the caller set the status to the sucess value
 189  */
 190 int iwl_mvm_send_cmd_pdu_status(struct iwl_mvm *mvm, u32 id, u16 len,
 191                                 const void *data, u32 *status)
 192 {
 193         struct iwl_host_cmd cmd = {
 194                 .id = id,
 195                 .len = { len, },
 196                 .data = { data, },
 197         };
 198
 199         return iwl_mvm_send_cmd_status(mvm, &cmd, status);
 200 }
 201
 202 #define IWL_DECLARE_RATE_INFO(r) \
 203         [IWL_RATE_##r##M_INDEX] = IWL_RATE_##r##M_PLCP
 204
 205 /*
 206  * Translate from fw_rate_index (IWL_RATE_XXM_INDEX) to PLCP
 207  */
 208 static const u8 fw_rate_idx_to_plcp[IWL_RATE_COUNT] = {
 209         IWL_DECLARE_RATE_INFO(1),
 210         IWL_DECLARE_RATE_INFO(2),
 211         IWL_DECLARE_RATE_INFO(5),
 212         IWL_DECLARE_RATE_INFO(11),
 213         IWL_DECLARE_RATE_INFO(6),
 214         IWL_DECLARE_RATE_INFO(9),
 215         IWL_DECLARE_RATE_INFO(12),
 216         IWL_DECLARE_RATE_INFO(18),
 217         IWL_DECLARE_RATE_INFO(24),
 218         IWL_DECLARE_RATE_INFO(36),
 219         IWL_DECLARE_RATE_INFO(48),
 220         IWL_DECLARE_RATE_INFO(54),
 221 };
 222
 223 int iwl_mvm_legacy_rate_to_mac80211_idx(u32 rate_n_flags,
 224                                         enum nl80211_band band)
 225 {
 226         int rate = rate_n_flags & RATE_LEGACY_RATE_MSK;
 227         int idx;
 228         int band_offset = 0;
 229
 230         /* Legacy rate format, search for match in table */
 231         if (band == NL80211_BAND_5GHZ)
 232                 band_offset = IWL_FIRST_OFDM_RATE;
 233         for (idx = band_offset; idx < IWL_RATE_COUNT_LEGACY; idx++)
 234                 if (fw_rate_idx_to_plcp[idx] == rate)
 235                         return idx - band_offset;
 236
 237         return -1;
 238 }
 239
 240 u8 iwl_mvm_mac80211_idx_to_hwrate(int rate_idx)
 241 {
 242         /* Get PLCP rate for tx_cmd->rate_n_flags */
 243         return fw_rate_idx_to_plcp[rate_idx];
 244 }
 245
 246 void iwl_mvm_rx_fw_error(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
 247 {
 248         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 249         struct iwl_error_resp *err_resp = (void *)pkt->data;
 250
 251         IWL_ERR(mvm, "FW Error notification: type 0x%08X cmd_id 0x%02X\n",
 252                 le32_to_cpu(err_resp->error_type), err_resp->cmd_id);
 253         IWL_ERR(mvm, "FW Error notification: seq 0x%04X service 0x%08X\n",
 254                 le16_to_cpu(err_resp->bad_cmd_seq_num),
 255                 le32_to_cpu(err_resp->error_service));
 256         IWL_ERR(mvm, "FW Error notification: timestamp 0x%16llX\n",
 257                 le64_to_cpu(err_resp->timestamp));
 258 }
 259
 260 /*
 261  * Returns the first antenna as ANT_[ABC], as defined in iwl-config.h.
 262  * The parameter should also be a combination of ANT_[ABC].
 263  */
 264 u8 first_antenna(u8 mask)
 265 {
 266         BUILD_BUG_ON(ANT_A != BIT(0)); /* using ffs is wrong if not */
 267         if (WARN_ON_ONCE(!mask)) /* ffs will return 0 if mask is zeroed */
 268                 return BIT(0);
 269         return BIT(ffs(mask) - 1);
 270 }
 271
 272 /*
 273  * Toggles between TX antennas to send the probe request on.
 274  * Receives the bitmask of valid TX antennas and the *index* used
 275  * for the last TX, and returns the next valid *index* to use.
 276  * In order to set it in the tx_cmd, must do BIT(idx).
 277  */
 278 u8 iwl_mvm_next_antenna(struct iwl_mvm *mvm, u8 valid, u8 last_idx)
 279 {
 280         u8 ind = last_idx;
 281         int i;
 282
 283         for (i = 0; i < MAX_ANT_NUM; i++) {
 284                 ind = (ind + 1) % MAX_ANT_NUM;
 285                 if (valid & BIT(ind))
 286                         return ind;
 287         }
 288
 289         WARN_ONCE(1, "Failed to toggle between antennas 0x%x", valid);
 290         return last_idx;
 291 }
 292
 293 static const struct {
 294         const char *name;
 295         u8 num;
 296 } advanced_lookup[] = {
 297         { "NMI_INTERRUPT_WDG", 0x34 },
 298         { "SYSASSERT", 0x35 },
 299         { "UCODE_VERSION_MISMATCH", 0x37 },
 300         { "BAD_COMMAND", 0x38 },
 301         { "NMI_INTERRUPT_DATA_ACTION_PT", 0x3C },
 302         { "FATAL_ERROR", 0x3D },
 303         { "NMI_TRM_HW_ERR", 0x46 },
 304         { "NMI_INTERRUPT_TRM", 0x4C },
 305         { "NMI_INTERRUPT_BREAK_POINT", 0x54 },
 306         { "NMI_INTERRUPT_WDG_RXF_FULL", 0x5C },
 307         { "NMI_INTERRUPT_WDG_NO_RBD_RXF_FULL", 0x64 },
 308         { "NMI_INTERRUPT_HOST", 0x66 },
 309         { "NMI_INTERRUPT_ACTION_PT", 0x7C },
 310         { "NMI_INTERRUPT_UNKNOWN", 0x84 },
 311         { "NMI_INTERRUPT_INST_ACTION_PT", 0x86 },
 312         { "ADVANCED_SYSASSERT", 0 },
 313 };
 314
 315 static const char *desc_lookup(u32 num)
 316 {
 317         int i;
 318
 319         for (i = 0; i < ARRAY_SIZE(advanced_lookup) - 1; i++)
 320                 if (advanced_lookup[i].num == num)
 321                         return advanced_lookup[i].name;
 322
 323         /* No entry matches 'num', so it is the last: ADVANCED_SYSASSERT */
 324         return advanced_lookup[i].name;
 325 }
 326
 327 /*
 328  * Note: This structure is read from the device with IO accesses,
 329  * and the reading already does the endian conversion. As it is
 330  * read with u32-sized accesses, any members with a different size
 331  * need to be ordered correctly though!
 332  */
 333 struct iwl_error_event_table_v1 {
 334         u32 valid;              /* (nonzero) valid, (0) log is empty */
 335         u32 error_id;           /* type of error */
 336         u32 pc;                 /* program counter */
 337         u32 blink1;             /* branch link */
 338         u32 blink2;             /* branch link */
 339         u32 ilink1;             /* interrupt link */
 340         u32 ilink2;             /* interrupt link */
 341         u32 data1;              /* error-specific data */
 342         u32 data2;              /* error-specific data */
 343         u32 data3;              /* error-specific data */
 344         u32 bcon_time;          /* beacon timer */
 345         u32 tsf_low;            /* network timestamp function timer */
 346         u32 tsf_hi;             /* network timestamp function timer */
 347         u32 gp1;                /* GP1 timer register */
 348         u32 gp2;                /* GP2 timer register */
 349         u32 gp3;                /* GP3 timer register */
 350         u32 ucode_ver;          /* uCode version */
 351         u32 hw_ver;             /* HW Silicon version */
 352         u32 brd_ver;            /* HW board version */
 353         u32 log_pc;             /* log program counter */
 354         u32 frame_ptr;          /* frame pointer */
 355         u32 stack_ptr;          /* stack pointer */
 356         u32 hcmd;               /* last host command header */
 357         u32 isr0;               /* isr status register LMPM_NIC_ISR0:
 358                                  * rxtx_flag */
 359         u32 isr1;               /* isr status register LMPM_NIC_ISR1:
 360                                  * host_flag */
 361         u32 isr2;               /* isr status register LMPM_NIC_ISR2:
 362                                  * enc_flag */
 363         u32 isr3;               /* isr status register LMPM_NIC_ISR3:
 364                                  * time_flag */
 365         u32 isr4;               /* isr status register LMPM_NIC_ISR4:
 366                                  * wico interrupt */
 367         u32 isr_pref;           /* isr status register LMPM_NIC_PREF_STAT */
 368         u32 wait_event;         /* wait event() caller address */
 369         u32 l2p_control;        /* L2pControlField */
 370         u32 l2p_duration;       /* L2pDurationField */
 371         u32 l2p_mhvalid;        /* L2pMhValidBits */
 372         u32 l2p_addr_match;     /* L2pAddrMatchStat */
 373         u32 lmpm_pmg_sel;       /* indicate which clocks are turned on
 374                                  * (LMPM_PMG_SEL) */
 375         u32 u_timestamp;        /* indicate when the date and time of the
 376                                  * compilation */
 377         u32 flow_handler;       /* FH read/write pointers, RX credit */
 378 } __packed /* LOG_ERROR_TABLE_API_S_VER_1 */;
 379
 380 struct iwl_error_event_table {
 381         u32 valid;              /* (nonzero) valid, (0) log is empty */
 382         u32 error_id;           /* type of error */
 383         u32 trm_hw_status0;     /* TRM HW status */
 384         u32 trm_hw_status1;     /* TRM HW status */
 385         u32 blink2;             /* branch link */
 386         u32 ilink1;             /* interrupt link */
 387         u32 ilink2;             /* interrupt link */
 388         u32 data1;              /* error-specific data */
 389         u32 data2;              /* error-specific data */
 390         u32 data3;              /* error-specific data */
 391         u32 bcon_time;          /* beacon timer */
 392         u32 tsf_low;            /* network timestamp function timer */
 393         u32 tsf_hi;             /* network timestamp function timer */
 394         u32 gp1;                /* GP1 timer register */
 395         u32 gp2;                /* GP2 timer register */
 396         u32 fw_rev_type;        /* firmware revision type */
 397         u32 major;              /* uCode version major */
 398         u32 minor;              /* uCode version minor */
 399         u32 hw_ver;             /* HW Silicon version */
 400         u32 brd_ver;            /* HW board version */
 401         u32 log_pc;             /* log program counter */
 402         u32 frame_ptr;          /* frame pointer */
 403         u32 stack_ptr;          /* stack pointer */
 404         u32 hcmd;               /* last host command header */
 405         u32 isr0;               /* isr status register LMPM_NIC_ISR0:
 406                                  * rxtx_flag */
 407         u32 isr1;               /* isr status register LMPM_NIC_ISR1:
 408                                  * host_flag */
 409         u32 isr2;               /* isr status register LMPM_NIC_ISR2:
 410                                  * enc_flag */
 411         u32 isr3;               /* isr status register LMPM_NIC_ISR3:
 412                                  * time_flag */
 413         u32 isr4;               /* isr status register LMPM_NIC_ISR4:
 414                                  * wico interrupt */
 415         u32 last_cmd_id;        /* last HCMD id handled by the firmware */
 416         u32 wait_event;         /* wait event() caller address */
 417         u32 l2p_control;        /* L2pControlField */
 418         u32 l2p_duration;       /* L2pDurationField */
 419         u32 l2p_mhvalid;        /* L2pMhValidBits */
 420         u32 l2p_addr_match;     /* L2pAddrMatchStat */
 421         u32 lmpm_pmg_sel;       /* indicate which clocks are turned on
 422                                  * (LMPM_PMG_SEL) */
 423         u32 u_timestamp;        /* indicate when the date and time of the
 424                                  * compilation */
 425         u32 flow_handler;       /* FH read/write pointers, RX credit */
 426 } __packed /* LOG_ERROR_TABLE_API_S_VER_3 */;
 427
 428 /*
 429  * UMAC error struct - relevant starting from family 8000 chip.
 430  * Note: This structure is read from the device with IO accesses,
 431  * and the reading already does the endian conversion. As it is
 432  * read with u32-sized accesses, any members with a different size
 433  * need to be ordered correctly though!
 434  */
 435 struct iwl_umac_error_event_table {
 436         u32 valid;              /* (nonzero) valid, (0) log is empty */
 437         u32 error_id;           /* type of error */
 438         u32 blink1;             /* branch link */
 439         u32 blink2;             /* branch link */
 440         u32 ilink1;             /* interrupt link */
 441         u32 ilink2;             /* interrupt link */
 442         u32 data1;              /* error-specific data */
 443         u32 data2;              /* error-specific data */
 444         u32 data3;              /* error-specific data */
 445         u32 umac_major;
 446         u32 umac_minor;
 447         u32 frame_pointer;      /* core register 27*/
 448         u32 stack_pointer;      /* core register 28 */
 449         u32 cmd_header;         /* latest host cmd sent to UMAC */
 450         u32 nic_isr_pref;       /* ISR status register */
 451 } __packed;
 452
 453 #define ERROR_START_OFFSET  (1 * sizeof(u32))
 454 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
 455
 456 static void iwl_mvm_dump_umac_error_log(struct iwl_mvm *mvm)
 457 {
 458         struct iwl_trans *trans = mvm->trans;
 459         struct iwl_umac_error_event_table table;
 460
 461         if (!mvm->support_umac_log)
 462                 return;
 463
 464         iwl_trans_read_mem_bytes(trans, mvm->umac_error_event_table, &table,
 465                                  sizeof(table));
 466
 467         if (ERROR_START_OFFSET <= table.valid * ERROR_ELEM_SIZE) {
 468                 IWL_ERR(trans, "Start IWL Error Log Dump:\n");
 469                 IWL_ERR(trans, "Status: 0x%08lX, count: %d\n",
 470                         mvm->status, table.valid);
 471         }
 472
 473         IWL_ERR(mvm, "0x%08X | %s\n", table.error_id,
 474                 desc_lookup(table.error_id));
 475         IWL_ERR(mvm, "0x%08X | umac branchlink1\n", table.blink1);
 476         IWL_ERR(mvm, "0x%08X | umac branchlink2\n", table.blink2);
 477         IWL_ERR(mvm, "0x%08X | umac interruptlink1\n", table.ilink1);
 478         IWL_ERR(mvm, "0x%08X | umac interruptlink2\n", table.ilink2);
 479         IWL_ERR(mvm, "0x%08X | umac data1\n", table.data1);
 480         IWL_ERR(mvm, "0x%08X | umac data2\n", table.data2);
 481         IWL_ERR(mvm, "0x%08X | umac data3\n", table.data3);
 482         IWL_ERR(mvm, "0x%08X | umac major\n", table.umac_major);
 483         IWL_ERR(mvm, "0x%08X | umac minor\n", table.umac_minor);
 484         IWL_ERR(mvm, "0x%08X | frame pointer\n", table.frame_pointer);
 485         IWL_ERR(mvm, "0x%08X | stack pointer\n", table.stack_pointer);
 486         IWL_ERR(mvm, "0x%08X | last host cmd\n", table.cmd_header);
 487         IWL_ERR(mvm, "0x%08X | isr status reg\n", table.nic_isr_pref);
 488 }
 489
 490 static void iwl_mvm_dump_lmac_error_log(struct iwl_mvm *mvm, u32 base)
 491 {
 492         struct iwl_trans *trans = mvm->trans;
 493         struct iwl_error_event_table table;
 494         u32 val;
 495
 496         if (mvm->fwrt.cur_fw_img == IWL_UCODE_INIT) {
 497                 if (!base)
 498                         base = mvm->fw->init_errlog_ptr;
 499         } else {
 500                 if (!base)
 501                         base = mvm->fw->inst_errlog_ptr;
 502         }
 503
 504         if (base < 0x400000) {
 505                 IWL_ERR(mvm,
 506                         "Not valid error log pointer 0x%08X for %s uCode\n",
 507                         base,
 508                         (mvm->fwrt.cur_fw_img == IWL_UCODE_INIT)
 509                         ? "Init" : "RT");
 510                 return;
 511         }
 512
 513         /* check if there is a HW error */
 514         val = iwl_trans_read_mem32(trans, base);
 515         if (((val & ~0xf) == 0xa5a5a5a0) || ((val & ~0xf) == 0x5a5a5a50)) {
 516                 int err;
 517
 518                 IWL_ERR(trans, "HW error, resetting before reading\n");
 519
 520                 /* reset the device */
 521                 iwl_trans_sw_reset(trans);
 522
 523                 /* set INIT_DONE flag */
 524                 iwl_set_bit(trans, CSR_GP_CNTRL,
 525                             BIT(trans->cfg->csr->flag_init_done));
 526
 527                 /* and wait for clock stabilization */
 528                 if (trans->cfg->device_family == IWL_DEVICE_FAMILY_8000)
 529                         udelay(2);
 530
 531                 err = iwl_poll_bit(trans, CSR_GP_CNTRL,
 532                                    BIT(trans->cfg->csr->flag_mac_clock_ready),
 533                                    BIT(trans->cfg->csr->flag_mac_clock_ready),
 534                                    25000);
 535                 if (err < 0) {
 536                         IWL_DEBUG_INFO(trans,
 537                                        "Failed to reset the card for the dump\n");
 538                         return;
 539                 }
 540         }
 541
 542         iwl_trans_read_mem_bytes(trans, base, &table, sizeof(table));
 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         trace_iwlwifi_dev_ucode_error(trans->dev, &table, table.hw_ver, table.brd_ver);
 555         IWL_ERR(mvm, "0x%08X | %-28s\n", table.error_id,
 556                 desc_lookup(table.error_id));
 557         IWL_ERR(mvm, "0x%08X | trm_hw_status0\n", table.trm_hw_status0);
 558         IWL_ERR(mvm, "0x%08X | trm_hw_status1\n", table.trm_hw_status1);
 559         IWL_ERR(mvm, "0x%08X | branchlink2\n", table.blink2);
 560         IWL_ERR(mvm, "0x%08X | interruptlink1\n", table.ilink1);
 561         IWL_ERR(mvm, "0x%08X | interruptlink2\n", table.ilink2);
 562         IWL_ERR(mvm, "0x%08X | data1\n", table.data1);
 563         IWL_ERR(mvm, "0x%08X | data2\n", table.data2);
 564         IWL_ERR(mvm, "0x%08X | data3\n", table.data3);
 565         IWL_ERR(mvm, "0x%08X | beacon time\n", table.bcon_time);
 566         IWL_ERR(mvm, "0x%08X | tsf low\n", table.tsf_low);
 567         IWL_ERR(mvm, "0x%08X | tsf hi\n", table.tsf_hi);
 568         IWL_ERR(mvm, "0x%08X | time gp1\n", table.gp1);
 569         IWL_ERR(mvm, "0x%08X | time gp2\n", table.gp2);
 570         IWL_ERR(mvm, "0x%08X | uCode revision type\n", table.fw_rev_type);
 571         IWL_ERR(mvm, "0x%08X | uCode version major\n", table.major);
 572         IWL_ERR(mvm, "0x%08X | uCode version minor\n", table.minor);
 573         IWL_ERR(mvm, "0x%08X | hw version\n", table.hw_ver);
 574         IWL_ERR(mvm, "0x%08X | board version\n", table.brd_ver);
 575         IWL_ERR(mvm, "0x%08X | hcmd\n", table.hcmd);
 576         IWL_ERR(mvm, "0x%08X | isr0\n", table.isr0);
 577         IWL_ERR(mvm, "0x%08X | isr1\n", table.isr1);
 578         IWL_ERR(mvm, "0x%08X | isr2\n", table.isr2);
 579         IWL_ERR(mvm, "0x%08X | isr3\n", table.isr3);
 580         IWL_ERR(mvm, "0x%08X | isr4\n", table.isr4);
 581         IWL_ERR(mvm, "0x%08X | last cmd Id\n", table.last_cmd_id);
 582         IWL_ERR(mvm, "0x%08X | wait_event\n", table.wait_event);
 583         IWL_ERR(mvm, "0x%08X | l2p_control\n", table.l2p_control);
 584         IWL_ERR(mvm, "0x%08X | l2p_duration\n", table.l2p_duration);
 585         IWL_ERR(mvm, "0x%08X | l2p_mhvalid\n", table.l2p_mhvalid);
 586         IWL_ERR(mvm, "0x%08X | l2p_addr_match\n", table.l2p_addr_match);
 587         IWL_ERR(mvm, "0x%08X | lmpm_pmg_sel\n", table.lmpm_pmg_sel);
 588         IWL_ERR(mvm, "0x%08X | timestamp\n", table.u_timestamp);
 589         IWL_ERR(mvm, "0x%08X | flow_handler\n", table.flow_handler);
 590 }
 591
 592 void iwl_mvm_dump_nic_error_log(struct iwl_mvm *mvm)
 593 {
 594         if (!test_bit(STATUS_DEVICE_ENABLED, &mvm->trans->status)) {
 595                 IWL_ERR(mvm,
 596                         "DEVICE_ENABLED bit is not set. Aborting dump.\n");
 597                 return;
 598         }
 599
 600         iwl_mvm_dump_lmac_error_log(mvm, mvm->error_event_table[0]);
 601
 602         if (mvm->error_event_table[1])
 603                 iwl_mvm_dump_lmac_error_log(mvm, mvm->error_event_table[1]);
 604
 605         iwl_mvm_dump_umac_error_log(mvm);
 606 }
 607
 608 int iwl_mvm_find_free_queue(struct iwl_mvm *mvm, u8 sta_id, u8 minq, u8 maxq)
 609 {
 610         int i;
 611
 612         lockdep_assert_held(&mvm->queue_info_lock);
 613
 614         /* This should not be hit with new TX path */
 615         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
 616                 return -ENOSPC;
 617
 618         /* Start by looking for a free queue */
 619         for (i = minq; i <= maxq; i++)
 620                 if (mvm->queue_info[i].hw_queue_refcount == 0 &&
 621                     mvm->queue_info[i].status == IWL_MVM_QUEUE_FREE)
 622                         return i;
 623
 624         /*
 625          * If no free queue found - settle for an inactive one to reconfigure
 626          * Make sure that the inactive queue either already belongs to this STA,
 627          * or that if it belongs to another one - it isn't the reserved queue
 628          */
 629         for (i = minq; i <= maxq; i++)
 630                 if (mvm->queue_info[i].status == IWL_MVM_QUEUE_INACTIVE &&
 631                     (sta_id == mvm->queue_info[i].ra_sta_id ||
 632                      !mvm->queue_info[i].reserved))
 633                         return i;
 634
 635         return -ENOSPC;
 636 }
 637
 638 int iwl_mvm_reconfig_scd(struct iwl_mvm *mvm, int queue, int fifo, int sta_id,
 639                          int tid, int frame_limit, u16 ssn)
 640 {
 641         struct iwl_scd_txq_cfg_cmd cmd = {
 642                 .scd_queue = queue,
 643                 .action = SCD_CFG_ENABLE_QUEUE,
 644                 .window = frame_limit,
 645                 .sta_id = sta_id,
 646                 .ssn = cpu_to_le16(ssn),
 647                 .tx_fifo = fifo,
 648                 .aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
 649                               queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE),
 650                 .tid = tid,
 651         };
 652         int ret;
 653
 654         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
 655                 return -EINVAL;
 656
 657         spin_lock_bh(&mvm->queue_info_lock);
 658         if (WARN(mvm->queue_info[queue].hw_queue_refcount == 0,
 659                  "Trying to reconfig unallocated queue %d\n", queue)) {
 660                 spin_unlock_bh(&mvm->queue_info_lock);
 661                 return -ENXIO;
 662         }
 663         spin_unlock_bh(&mvm->queue_info_lock);
 664
 665         IWL_DEBUG_TX_QUEUES(mvm, "Reconfig SCD for TXQ #%d\n", queue);
 666
 667         ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd);
 668         WARN_ONCE(ret, "Failed to re-configure queue %d on FIFO %d, ret=%d\n",
 669                   queue, fifo, ret);
 670
 671         return ret;
 672 }
 673
 674 static bool iwl_mvm_update_txq_mapping(struct iwl_mvm *mvm, int queue,
 675                                        int mac80211_queue, u8 sta_id, u8 tid)
 676 {
 677         bool enable_queue = true;
 678
 679         spin_lock_bh(&mvm->queue_info_lock);
 680
 681         /* Make sure this TID isn't already enabled */
 682         if (mvm->queue_info[queue].tid_bitmap & BIT(tid)) {
 683                 spin_unlock_bh(&mvm->queue_info_lock);
 684                 IWL_ERR(mvm, "Trying to enable TXQ %d with existing TID %d\n",
 685                         queue, tid);
 686                 return false;
 687         }
 688
 689         /* Update mappings and refcounts */
 690         if (mvm->queue_info[queue].hw_queue_refcount > 0)
 691                 enable_queue = false;
 692
 693         if (mac80211_queue != IEEE80211_INVAL_HW_QUEUE) {
 694                 WARN(mac80211_queue >=
 695                      BITS_PER_BYTE * sizeof(mvm->hw_queue_to_mac80211[0]),
 696                      "cannot track mac80211 queue %d (queue %d, sta %d, tid %d)\n",
 697                      mac80211_queue, queue, sta_id, tid);
 698                 mvm->hw_queue_to_mac80211[queue] |= BIT(mac80211_queue);
 699         }
 700
 701         mvm->queue_info[queue].hw_queue_refcount++;
 702         mvm->queue_info[queue].tid_bitmap |= BIT(tid);
 703         mvm->queue_info[queue].ra_sta_id = sta_id;
 704
 705         if (enable_queue) {
 706                 if (tid != IWL_MAX_TID_COUNT)
 707                         mvm->queue_info[queue].mac80211_ac =
 708                                 tid_to_mac80211_ac[tid];
 709                 else
 710                         mvm->queue_info[queue].mac80211_ac = IEEE80211_AC_VO;
 711
 712                 mvm->queue_info[queue].txq_tid = tid;
 713         }
 714
 715         IWL_DEBUG_TX_QUEUES(mvm,
 716                             "Enabling TXQ #%d refcount=%d (mac80211 map:0x%x)\n",
 717                             queue, mvm->queue_info[queue].hw_queue_refcount,
 718                             mvm->hw_queue_to_mac80211[queue]);
 719
 720         spin_unlock_bh(&mvm->queue_info_lock);
 721
 722         return enable_queue;
 723 }
 724
 725 int iwl_mvm_tvqm_enable_txq(struct iwl_mvm *mvm, int mac80211_queue,
 726                             u8 sta_id, u8 tid, unsigned int timeout)
 727 {
 728         struct iwl_tx_queue_cfg_cmd cmd = {
 729                 .flags = cpu_to_le16(TX_QUEUE_CFG_ENABLE_QUEUE),
 730                 .sta_id = sta_id,
 731                 .tid = tid,
 732         };
 733         int queue, size = IWL_DEFAULT_QUEUE_SIZE;
 734
 735         if (cmd.tid == IWL_MAX_TID_COUNT) {
 736                 cmd.tid = IWL_MGMT_TID;
 737                 size = IWL_MGMT_QUEUE_SIZE;
 738         }
 739         queue = iwl_trans_txq_alloc(mvm->trans, (void *)&cmd,
 740                                     SCD_QUEUE_CFG, size, timeout);
 741
 742         if (queue < 0) {
 743                 IWL_DEBUG_TX_QUEUES(mvm,
 744                                     "Failed allocating TXQ for sta %d tid %d, ret: %d\n",
 745                                     sta_id, tid, queue);
 746                 return queue;
 747         }
 748
 749         IWL_DEBUG_TX_QUEUES(mvm, "Enabling TXQ #%d for sta %d tid %d\n",
 750                             queue, sta_id, tid);
 751
 752         mvm->hw_queue_to_mac80211[queue] |= BIT(mac80211_queue);
 753         IWL_DEBUG_TX_QUEUES(mvm,
 754                             "Enabling TXQ #%d (mac80211 map:0x%x)\n",
 755                             queue, mvm->hw_queue_to_mac80211[queue]);
 756
 757         return queue;
 758 }
 759
 760 bool iwl_mvm_enable_txq(struct iwl_mvm *mvm, int queue, int mac80211_queue,
 761                         u16 ssn, const struct iwl_trans_txq_scd_cfg *cfg,
 762                         unsigned int wdg_timeout)
 763 {
 764         struct iwl_scd_txq_cfg_cmd cmd = {
 765                 .scd_queue = queue,
 766                 .action = SCD_CFG_ENABLE_QUEUE,
 767                 .window = cfg->frame_limit,
 768                 .sta_id = cfg->sta_id,
 769                 .ssn = cpu_to_le16(ssn),
 770                 .tx_fifo = cfg->fifo,
 771                 .aggregate = cfg->aggregate,
 772                 .tid = cfg->tid,
 773         };
 774         bool inc_ssn;
 775
 776         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
 777                 return false;
 778
 779         /* Send the enabling command if we need to */
 780         if (!iwl_mvm_update_txq_mapping(mvm, queue, mac80211_queue,
 781                                         cfg->sta_id, cfg->tid))
 782                 return false;
 783
 784         inc_ssn = iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn,
 785                                            NULL, wdg_timeout);
 786         if (inc_ssn)
 787                 le16_add_cpu(&cmd.ssn, 1);
 788
 789         WARN(iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd),
 790              "Failed to configure queue %d on FIFO %d\n", queue, cfg->fifo);
 791
 792         return inc_ssn;
 793 }
 794
 795 int iwl_mvm_disable_txq(struct iwl_mvm *mvm, int queue, int mac80211_queue,
 796                         u8 tid, u8 flags)
 797 {
 798         struct iwl_scd_txq_cfg_cmd cmd = {
 799                 .scd_queue = queue,
 800                 .action = SCD_CFG_DISABLE_QUEUE,
 801         };
 802         bool remove_mac_queue = mac80211_queue != IEEE80211_INVAL_HW_QUEUE;
 803         int ret;
 804
 805         if (WARN_ON(remove_mac_queue && mac80211_queue >= IEEE80211_MAX_QUEUES))
 806                 return -EINVAL;
 807
 808         if (iwl_mvm_has_new_tx_api(mvm)) {
 809                 spin_lock_bh(&mvm->queue_info_lock);
 810
 811                 if (remove_mac_queue)
 812                         mvm->hw_queue_to_mac80211[queue] &=
 813                                 ~BIT(mac80211_queue);
 814
 815                 spin_unlock_bh(&mvm->queue_info_lock);
 816
 817                 iwl_trans_txq_free(mvm->trans, queue);
 818
 819                 return 0;
 820         }
 821
 822         spin_lock_bh(&mvm->queue_info_lock);
 823
 824         if (WARN_ON(mvm->queue_info[queue].hw_queue_refcount == 0)) {
 825                 spin_unlock_bh(&mvm->queue_info_lock);
 826                 return 0;
 827         }
 828
 829         mvm->queue_info[queue].tid_bitmap &= ~BIT(tid);
 830
 831         /*
 832          * If there is another TID with the same AC - don't remove the MAC queue
 833          * from the mapping
 834          */
 835         if (tid < IWL_MAX_TID_COUNT) {
 836                 unsigned long tid_bitmap =
 837                         mvm->queue_info[queue].tid_bitmap;
 838                 int ac = tid_to_mac80211_ac[tid];
 839                 int i;
 840
 841                 for_each_set_bit(i, &tid_bitmap, IWL_MAX_TID_COUNT) {
 842                         if (tid_to_mac80211_ac[i] == ac)
 843                                 remove_mac_queue = false;
 844                 }
 845         }
 846
 847         if (remove_mac_queue)
 848                 mvm->hw_queue_to_mac80211[queue] &=
 849                         ~BIT(mac80211_queue);
 850         mvm->queue_info[queue].hw_queue_refcount--;
 851
 852         cmd.action = mvm->queue_info[queue].hw_queue_refcount ?
 853                 SCD_CFG_ENABLE_QUEUE : SCD_CFG_DISABLE_QUEUE;
 854         if (cmd.action == SCD_CFG_DISABLE_QUEUE)
 855                 mvm->queue_info[queue].status = IWL_MVM_QUEUE_FREE;
 856
 857         IWL_DEBUG_TX_QUEUES(mvm,
 858                             "Disabling TXQ #%d refcount=%d (mac80211 map:0x%x)\n",
 859                             queue,
 860                             mvm->queue_info[queue].hw_queue_refcount,
 861                             mvm->hw_queue_to_mac80211[queue]);
 862
 863         /* If the queue is still enabled - nothing left to do in this func */
 864         if (cmd.action == SCD_CFG_ENABLE_QUEUE) {
 865                 spin_unlock_bh(&mvm->queue_info_lock);
 866                 return 0;
 867         }
 868
 869         cmd.sta_id = mvm->queue_info[queue].ra_sta_id;
 870         cmd.tid = mvm->queue_info[queue].txq_tid;
 871
 872         /* Make sure queue info is correct even though we overwrite it */
 873         WARN(mvm->queue_info[queue].hw_queue_refcount ||
 874              mvm->queue_info[queue].tid_bitmap ||
 875              mvm->hw_queue_to_mac80211[queue],
 876              "TXQ #%d info out-of-sync - refcount=%d, mac map=0x%x, tid=0x%x\n",
 877              queue, mvm->queue_info[queue].hw_queue_refcount,
 878              mvm->hw_queue_to_mac80211[queue],
 879              mvm->queue_info[queue].tid_bitmap);
 880
 881         /* If we are here - the queue is freed and we can zero out these vals */
 882         mvm->queue_info[queue].hw_queue_refcount = 0;
 883         mvm->queue_info[queue].tid_bitmap = 0;
 884         mvm->hw_queue_to_mac80211[queue] = 0;
 885
 886         /* Regardless if this is a reserved TXQ for a STA - mark it as false */
 887         mvm->queue_info[queue].reserved = false;
 888
 889         spin_unlock_bh(&mvm->queue_info_lock);
 890
 891         iwl_trans_txq_disable(mvm->trans, queue, false);
 892         ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, flags,
 893                                    sizeof(struct iwl_scd_txq_cfg_cmd), &cmd);
 894
 895         if (ret)
 896                 IWL_ERR(mvm, "Failed to disable queue %d (ret=%d)\n",
 897                         queue, ret);
 898         return ret;
 899 }
 900
 901 /**
 902  * iwl_mvm_send_lq_cmd() - Send link quality command
 903  * @sync: This command can be sent synchronously.
 904  *
 905  * The link quality command is sent as the last step of station creation.
 906  * This is the special case in which init is set and we call a callback in
 907  * this case to clear the state indicating that station creation is in
 908  * progress.
 909  */
 910 int iwl_mvm_send_lq_cmd(struct iwl_mvm *mvm, struct iwl_lq_cmd *lq, bool sync)
 911 {
 912         struct iwl_host_cmd cmd = {
 913                 .id = LQ_CMD,
 914                 .len = { sizeof(struct iwl_lq_cmd), },
 915                 .flags = sync ? 0 : CMD_ASYNC,
 916                 .data = { lq, },
 917         };
 918
 919         if (WARN_ON(lq->sta_id == IWL_MVM_INVALID_STA ||
 920                     iwl_mvm_has_tlc_offload(mvm)))
 921                 return -EINVAL;
 922
 923         return iwl_mvm_send_cmd(mvm, &cmd);
 924 }
 925
 926 /**
 927  * iwl_mvm_update_smps - Get a request to change the SMPS mode
 928  * @req_type: The part of the driver who call for a change.
 929  * @smps_requests: The request to change the SMPS mode.
 930  *
 931  * Get a requst to change the SMPS mode,
 932  * and change it according to all other requests in the driver.
 933  */
 934 void iwl_mvm_update_smps(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 935                          enum iwl_mvm_smps_type_request req_type,
 936                          enum ieee80211_smps_mode smps_request)
 937 {
 938         struct iwl_mvm_vif *mvmvif;
 939         enum ieee80211_smps_mode smps_mode;
 940         int i;
 941
 942         lockdep_assert_held(&mvm->mutex);
 943
 944         /* SMPS is irrelevant for NICs that don't have at least 2 RX antenna */
 945         if (num_of_ant(iwl_mvm_get_valid_rx_ant(mvm)) == 1)
 946                 return;
 947
 948         if (vif->type == NL80211_IFTYPE_AP)
 949                 smps_mode = IEEE80211_SMPS_OFF;
 950         else
 951                 smps_mode = IEEE80211_SMPS_AUTOMATIC;
 952
 953         mvmvif = iwl_mvm_vif_from_mac80211(vif);
 954         mvmvif->smps_requests[req_type] = smps_request;
 955         for (i = 0; i < NUM_IWL_MVM_SMPS_REQ; i++) {
 956                 if (mvmvif->smps_requests[i] == IEEE80211_SMPS_STATIC) {
 957                         smps_mode = IEEE80211_SMPS_STATIC;
 958                         break;
 959                 }
 960                 if (mvmvif->smps_requests[i] == IEEE80211_SMPS_DYNAMIC)
 961                         smps_mode = IEEE80211_SMPS_DYNAMIC;
 962         }
 963
 964         ieee80211_request_smps(vif, smps_mode);
 965 }
 966
 967 int iwl_mvm_request_statistics(struct iwl_mvm *mvm, bool clear)
 968 {
 969         struct iwl_statistics_cmd scmd = {
 970                 .flags = clear ? cpu_to_le32(IWL_STATISTICS_FLG_CLEAR) : 0,
 971         };
 972         struct iwl_host_cmd cmd = {
 973                 .id = STATISTICS_CMD,
 974                 .len[0] = sizeof(scmd),
 975                 .data[0] = &scmd,
 976                 .flags = CMD_WANT_SKB,
 977         };
 978         int ret;
 979
 980         ret = iwl_mvm_send_cmd(mvm, &cmd);
 981         if (ret)
 982                 return ret;
 983
 984         iwl_mvm_handle_rx_statistics(mvm, cmd.resp_pkt);
 985         iwl_free_resp(&cmd);
 986
 987         if (clear)
 988                 iwl_mvm_accu_radio_stats(mvm);
 989
 990         return 0;
 991 }
 992
 993 void iwl_mvm_accu_radio_stats(struct iwl_mvm *mvm)
 994 {
 995         mvm->accu_radio_stats.rx_time += mvm->radio_stats.rx_time;
 996         mvm->accu_radio_stats.tx_time += mvm->radio_stats.tx_time;
 997         mvm->accu_radio_stats.on_time_rf += mvm->radio_stats.on_time_rf;
 998         mvm->accu_radio_stats.on_time_scan += mvm->radio_stats.on_time_scan;
 999 }
1000
1001 static void iwl_mvm_diversity_iter(void *_data, u8 *mac,
1002                                    struct ieee80211_vif *vif)
1003 {
1004         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1005         bool *result = _data;
1006         int i;
1007
1008         for (i = 0; i < NUM_IWL_MVM_SMPS_REQ; i++) {
1009                 if (mvmvif->smps_requests[i] == IEEE80211_SMPS_STATIC ||
1010                     mvmvif->smps_requests[i] == IEEE80211_SMPS_DYNAMIC)
1011                         *result = false;
1012         }
1013 }
1014
1015 bool iwl_mvm_rx_diversity_allowed(struct iwl_mvm *mvm)
1016 {
1017         bool result = true;
1018
1019         lockdep_assert_held(&mvm->mutex);
1020
1021         if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM)
1022                 return false;
1023
1024         if (num_of_ant(iwl_mvm_get_valid_rx_ant(mvm)) == 1)
1025                 return false;
1026
1027         if (mvm->cfg->rx_with_siso_diversity)
1028                 return false;
1029
1030         ieee80211_iterate_active_interfaces_atomic(
1031                         mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1032                         iwl_mvm_diversity_iter, &result);
1033
1034         return result;
1035 }
1036
1037 int iwl_mvm_update_low_latency(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1038                                bool low_latency,
1039                                enum iwl_mvm_low_latency_cause cause)
1040 {
1041         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1042         int res;
1043         bool prev;
1044
1045         lockdep_assert_held(&mvm->mutex);
1046
1047         prev = iwl_mvm_vif_low_latency(mvmvif);
1048         iwl_mvm_vif_set_low_latency(mvmvif, low_latency, cause);
1049
1050         low_latency = iwl_mvm_vif_low_latency(mvmvif);
1051
1052         if (low_latency == prev)
1053                 return 0;
1054
1055         if (fw_has_capa(&mvm->fw->ucode_capa,
1056                         IWL_UCODE_TLV_CAPA_DYNAMIC_QUOTA)) {
1057                 struct iwl_mac_low_latency_cmd cmd = {
1058                         .mac_id = cpu_to_le32(mvmvif->id)
1059                 };
1060
1061                 if (low_latency) {
1062                         /* currently we don't care about the direction */
1063                         cmd.low_latency_rx = 1;
1064                         cmd.low_latency_tx = 1;
1065                 }
1066                 res = iwl_mvm_send_cmd_pdu(mvm,
1067                                            iwl_cmd_id(LOW_LATENCY_CMD,
1068                                                       MAC_CONF_GROUP, 0),
1069                                            0, sizeof(cmd), &cmd);
1070                 if (res)
1071                         IWL_ERR(mvm, "Failed to send low latency command\n");
1072         }
1073
1074         res = iwl_mvm_update_quotas(mvm, false, NULL);
1075         if (res)
1076                 return res;
1077
1078         iwl_mvm_bt_coex_vif_change(mvm);
1079
1080         return iwl_mvm_power_update_mac(mvm);
1081 }
1082
1083 struct iwl_mvm_low_latency_iter {
1084         bool result;
1085         bool result_per_band[NUM_NL80211_BANDS];
1086 };
1087
1088 static void iwl_mvm_ll_iter(void *_data, u8 *mac, struct ieee80211_vif *vif)
1089 {
1090         struct iwl_mvm_low_latency_iter *result = _data;
1091         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1092         enum nl80211_band band;
1093
1094         if (iwl_mvm_vif_low_latency(mvmvif)) {
1095                 result->result = true;
1096
1097                 if (!mvmvif->phy_ctxt)
1098                         return;
1099
1100                 band = mvmvif->phy_ctxt->channel->band;
1101                 result->result_per_band[band] = true;
1102         }
1103 }
1104
1105 bool iwl_mvm_low_latency(struct iwl_mvm *mvm)
1106 {
1107         struct iwl_mvm_low_latency_iter data = {};
1108
1109         ieee80211_iterate_active_interfaces_atomic(
1110                         mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1111                         iwl_mvm_ll_iter, &data);
1112
1113         return data.result;
1114 }
1115
1116 bool iwl_mvm_low_latency_band(struct iwl_mvm *mvm, enum nl80211_band band)
1117 {
1118         struct iwl_mvm_low_latency_iter data = {};
1119
1120         ieee80211_iterate_active_interfaces_atomic(
1121                         mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1122                         iwl_mvm_ll_iter, &data);
1123
1124         return data.result_per_band[band];
1125 }
1126
1127 struct iwl_bss_iter_data {
1128         struct ieee80211_vif *vif;
1129         bool error;
1130 };
1131
1132 static void iwl_mvm_bss_iface_iterator(void *_data, u8 *mac,
1133                                        struct ieee80211_vif *vif)
1134 {
1135         struct iwl_bss_iter_data *data = _data;
1136
1137         if (vif->type != NL80211_IFTYPE_STATION || vif->p2p)
1138                 return;
1139
1140         if (data->vif) {
1141                 data->error = true;
1142                 return;
1143         }
1144
1145         data->vif = vif;
1146 }
1147
1148 struct ieee80211_vif *iwl_mvm_get_bss_vif(struct iwl_mvm *mvm)
1149 {
1150         struct iwl_bss_iter_data bss_iter_data = {};
1151
1152         ieee80211_iterate_active_interfaces_atomic(
1153                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1154                 iwl_mvm_bss_iface_iterator, &bss_iter_data);
1155
1156         if (bss_iter_data.error) {
1157                 IWL_ERR(mvm, "More than one managed interface active!\n");
1158                 return ERR_PTR(-EINVAL);
1159         }
1160
1161         return bss_iter_data.vif;
1162 }
1163
1164 struct iwl_sta_iter_data {
1165         bool assoc;
1166 };
1167
1168 static void iwl_mvm_sta_iface_iterator(void *_data, u8 *mac,
1169                                        struct ieee80211_vif *vif)
1170 {
1171         struct iwl_sta_iter_data *data = _data;
1172
1173         if (vif->type != NL80211_IFTYPE_STATION)
1174                 return;
1175
1176         if (vif->bss_conf.assoc)
1177                 data->assoc = true;
1178 }
1179
1180 bool iwl_mvm_is_vif_assoc(struct iwl_mvm *mvm)
1181 {
1182         struct iwl_sta_iter_data data = {
1183                 .assoc = false,
1184         };
1185
1186         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1187                                                    IEEE80211_IFACE_ITER_NORMAL,
1188                                                    iwl_mvm_sta_iface_iterator,
1189                                                    &data);
1190         return data.assoc;
1191 }
1192
1193 unsigned int iwl_mvm_get_wd_timeout(struct iwl_mvm *mvm,
1194                                     struct ieee80211_vif *vif,
1195                                     bool tdls, bool cmd_q)
1196 {
1197         struct iwl_fw_dbg_trigger_tlv *trigger;
1198         struct iwl_fw_dbg_trigger_txq_timer *txq_timer;
1199         unsigned int default_timeout =
1200                 cmd_q ? IWL_DEF_WD_TIMEOUT : mvm->cfg->base_params->wd_timeout;
1201
1202         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_TXQ_TIMERS)) {
1203                 /*
1204                  * We can't know when the station is asleep or awake, so we
1205                  * must disable the queue hang detection.
1206                  */
1207                 if (fw_has_capa(&mvm->fw->ucode_capa,
1208                                 IWL_UCODE_TLV_CAPA_STA_PM_NOTIF) &&
1209                     vif && vif->type == NL80211_IFTYPE_AP)
1210                         return IWL_WATCHDOG_DISABLED;
1211                 return iwlmvm_mod_params.tfd_q_hang_detect ?
1212                         default_timeout : IWL_WATCHDOG_DISABLED;
1213         }
1214
1215         trigger = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_TXQ_TIMERS);
1216         txq_timer = (void *)trigger->data;
1217
1218         if (tdls)
1219                 return le32_to_cpu(txq_timer->tdls);
1220
1221         if (cmd_q)
1222                 return le32_to_cpu(txq_timer->command_queue);
1223
1224         if (WARN_ON(!vif))
1225                 return default_timeout;
1226
1227         switch (ieee80211_vif_type_p2p(vif)) {
1228         case NL80211_IFTYPE_ADHOC:
1229                 return le32_to_cpu(txq_timer->ibss);
1230         case NL80211_IFTYPE_STATION:
1231                 return le32_to_cpu(txq_timer->bss);
1232         case NL80211_IFTYPE_AP:
1233                 return le32_to_cpu(txq_timer->softap);
1234         case NL80211_IFTYPE_P2P_CLIENT:
1235                 return le32_to_cpu(txq_timer->p2p_client);
1236         case NL80211_IFTYPE_P2P_GO:
1237                 return le32_to_cpu(txq_timer->p2p_go);
1238         case NL80211_IFTYPE_P2P_DEVICE:
1239                 return le32_to_cpu(txq_timer->p2p_device);
1240         case NL80211_IFTYPE_MONITOR:
1241                 return default_timeout;
1242         default:
1243                 WARN_ON(1);
1244                 return mvm->cfg->base_params->wd_timeout;
1245         }
1246 }
1247
1248 void iwl_mvm_connection_loss(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1249                              const char *errmsg)
1250 {
1251         struct iwl_fw_dbg_trigger_tlv *trig;
1252         struct iwl_fw_dbg_trigger_mlme *trig_mlme;
1253
1254         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_MLME))
1255                 goto out;
1256
1257         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_MLME);
1258         trig_mlme = (void *)trig->data;
1259         if (!iwl_fw_dbg_trigger_check_stop(&mvm->fwrt,
1260                                            ieee80211_vif_to_wdev(vif), trig))
1261                 goto out;
1262
1263         if (trig_mlme->stop_connection_loss &&
1264             --trig_mlme->stop_connection_loss)
1265                 goto out;
1266
1267         iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, "%s", errmsg);
1268
1269 out:
1270         ieee80211_connection_loss(vif);
1271 }
1272
1273 /*
1274  * Remove inactive TIDs of a given queue.
1275  * If all queue TIDs are inactive - mark the queue as inactive
1276  * If only some the queue TIDs are inactive - unmap them from the queue
1277  */
1278 static void iwl_mvm_remove_inactive_tids(struct iwl_mvm *mvm,
1279                                          struct iwl_mvm_sta *mvmsta, int queue,
1280                                          unsigned long tid_bitmap)
1281 {
1282         int tid;
1283
1284         lockdep_assert_held(&mvmsta->lock);
1285         lockdep_assert_held(&mvm->queue_info_lock);
1286
1287         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
1288                 return;
1289
1290         /* Go over all non-active TIDs, incl. IWL_MAX_TID_COUNT (for mgmt) */
1291         for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
1292                 /* If some TFDs are still queued - don't mark TID as inactive */
1293                 if (iwl_mvm_tid_queued(mvm, &mvmsta->tid_data[tid]))
1294                         tid_bitmap &= ~BIT(tid);
1295
1296                 /* Don't mark as inactive any TID that has an active BA */
1297                 if (mvmsta->tid_data[tid].state != IWL_AGG_OFF)
1298                         tid_bitmap &= ~BIT(tid);
1299         }
1300
1301         /* If all TIDs in the queue are inactive - mark queue as inactive. */
1302         if (tid_bitmap == mvm->queue_info[queue].tid_bitmap) {
1303                 mvm->queue_info[queue].status = IWL_MVM_QUEUE_INACTIVE;
1304
1305                 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1)
1306                         mvmsta->tid_data[tid].is_tid_active = false;
1307
1308                 IWL_DEBUG_TX_QUEUES(mvm, "Queue %d marked as inactive\n",
1309                                     queue);
1310                 return;
1311         }
1312
1313         /*
1314          * If we are here, this is a shared queue and not all TIDs timed-out.
1315          * Remove the ones that did.
1316          */
1317         for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
1318                 int mac_queue = mvmsta->vif->hw_queue[tid_to_mac80211_ac[tid]];
1319
1320                 mvmsta->tid_data[tid].txq_id = IWL_MVM_INVALID_QUEUE;
1321                 mvm->hw_queue_to_mac80211[queue] &= ~BIT(mac_queue);
1322                 mvm->queue_info[queue].hw_queue_refcount--;
1323                 mvm->queue_info[queue].tid_bitmap &= ~BIT(tid);
1324                 mvmsta->tid_data[tid].is_tid_active = false;
1325
1326                 IWL_DEBUG_TX_QUEUES(mvm,
1327                                     "Removing inactive TID %d from shared Q:%d\n",
1328                                     tid, queue);
1329         }
1330
1331         IWL_DEBUG_TX_QUEUES(mvm,
1332                             "TXQ #%d left with tid bitmap 0x%x\n", queue,
1333                             mvm->queue_info[queue].tid_bitmap);
1334
1335         /*
1336          * There may be different TIDs with the same mac queues, so make
1337          * sure all TIDs have existing corresponding mac queues enabled
1338          */
1339         tid_bitmap = mvm->queue_info[queue].tid_bitmap;
1340         for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
1341                 mvm->hw_queue_to_mac80211[queue] |=
1342                         BIT(mvmsta->vif->hw_queue[tid_to_mac80211_ac[tid]]);
1343         }
1344
1345         /* If the queue is marked as shared - "unshare" it */
1346         if (mvm->queue_info[queue].hw_queue_refcount == 1 &&
1347             mvm->queue_info[queue].status == IWL_MVM_QUEUE_SHARED) {
1348                 mvm->queue_info[queue].status = IWL_MVM_QUEUE_RECONFIGURING;
1349                 IWL_DEBUG_TX_QUEUES(mvm, "Marking Q:%d for reconfig\n",
1350                                     queue);
1351         }
1352 }
1353
1354 void iwl_mvm_inactivity_check(struct iwl_mvm *mvm)
1355 {
1356         unsigned long timeout_queues_map = 0;
1357         unsigned long now = jiffies;
1358         int i;
1359
1360         if (iwl_mvm_has_new_tx_api(mvm))
1361                 return;
1362
1363         spin_lock_bh(&mvm->queue_info_lock);
1364         for (i = 0; i < IWL_MAX_HW_QUEUES; i++)
1365                 if (mvm->queue_info[i].hw_queue_refcount > 0)
1366                         timeout_queues_map |= BIT(i);
1367         spin_unlock_bh(&mvm->queue_info_lock);
1368
1369         rcu_read_lock();
1370
1371         /*
1372          * If a queue time outs - mark it as INACTIVE (don't remove right away
1373          * if we don't have to.) This is an optimization in case traffic comes
1374          * later, and we don't HAVE to use a currently-inactive queue
1375          */
1376         for_each_set_bit(i, &timeout_queues_map, IWL_MAX_HW_QUEUES) {
1377                 struct ieee80211_sta *sta;
1378                 struct iwl_mvm_sta *mvmsta;
1379                 u8 sta_id;
1380                 int tid;
1381                 unsigned long inactive_tid_bitmap = 0;
1382                 unsigned long queue_tid_bitmap;
1383
1384                 spin_lock_bh(&mvm->queue_info_lock);
1385                 queue_tid_bitmap = mvm->queue_info[i].tid_bitmap;
1386
1387                 /* If TXQ isn't in active use anyway - nothing to do here... */
1388                 if (mvm->queue_info[i].status != IWL_MVM_QUEUE_READY &&
1389                     mvm->queue_info[i].status != IWL_MVM_QUEUE_SHARED) {
1390                         spin_unlock_bh(&mvm->queue_info_lock);
1391                         continue;
1392                 }
1393
1394                 /* Check to see if there are inactive TIDs on this queue */
1395                 for_each_set_bit(tid, &queue_tid_bitmap,
1396                                  IWL_MAX_TID_COUNT + 1) {
1397                         if (time_after(mvm->queue_info[i].last_frame_time[tid] +
1398                                        IWL_MVM_DQA_QUEUE_TIMEOUT, now))
1399                                 continue;
1400
1401                         inactive_tid_bitmap |= BIT(tid);
1402                 }
1403                 spin_unlock_bh(&mvm->queue_info_lock);
1404
1405                 /* If all TIDs are active - finish check on this queue */
1406                 if (!inactive_tid_bitmap)
1407                         continue;
1408
1409                 /*
1410                  * If we are here - the queue hadn't been served recently and is
1411                  * in use
1412                  */
1413
1414                 sta_id = mvm->queue_info[i].ra_sta_id;
1415                 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1416
1417                 /*
1418                  * If the STA doesn't exist anymore, it isn't an error. It could
1419                  * be that it was removed since getting the queues, and in this
1420                  * case it should've inactivated its queues anyway.
1421                  */
1422                 if (IS_ERR_OR_NULL(sta))
1423                         continue;
1424
1425                 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1426
1427                 spin_lock_bh(&mvmsta->lock);
1428                 spin_lock(&mvm->queue_info_lock);
1429                 iwl_mvm_remove_inactive_tids(mvm, mvmsta, i,
1430                                              inactive_tid_bitmap);
1431                 spin_unlock(&mvm->queue_info_lock);
1432                 spin_unlock_bh(&mvmsta->lock);
1433         }
1434
1435         rcu_read_unlock();
1436 }
1437
1438 void iwl_mvm_event_frame_timeout_callback(struct iwl_mvm *mvm,
1439                                           struct ieee80211_vif *vif,
1440                                           const struct ieee80211_sta *sta,
1441                                           u16 tid)
1442 {
1443         struct iwl_fw_dbg_trigger_tlv *trig;
1444         struct iwl_fw_dbg_trigger_ba *ba_trig;
1445
1446         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
1447                 return;
1448
1449         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
1450         ba_trig = (void *)trig->data;
1451         if (!iwl_fw_dbg_trigger_check_stop(&mvm->fwrt,
1452                                            ieee80211_vif_to_wdev(vif), trig))
1453                 return;
1454
1455         if (!(le16_to_cpu(ba_trig->frame_timeout) & BIT(tid)))
1456                 return;
1457
1458         iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
1459                                 "Frame from %pM timed out, tid %d",
1460                                 sta->addr, tid);
1461 }
1462
1463 u8 iwl_mvm_tcm_load_percentage(u32 airtime, u32 elapsed)
1464 {
1465         if (!elapsed)
1466                 return 0;
1467
1468         return (100 * airtime / elapsed) / USEC_PER_MSEC;
1469 }
1470
1471 static enum iwl_mvm_traffic_load
1472 iwl_mvm_tcm_load(struct iwl_mvm *mvm, u32 airtime, unsigned long elapsed)
1473 {
1474         u8 load = iwl_mvm_tcm_load_percentage(airtime, elapsed);
1475
1476         if (load > IWL_MVM_TCM_LOAD_HIGH_THRESH)
1477                 return IWL_MVM_TRAFFIC_HIGH;
1478         if (load > IWL_MVM_TCM_LOAD_MEDIUM_THRESH)
1479                 return IWL_MVM_TRAFFIC_MEDIUM;
1480
1481         return IWL_MVM_TRAFFIC_LOW;
1482 }
1483
1484 struct iwl_mvm_tcm_iter_data {
1485         struct iwl_mvm *mvm;
1486         bool any_sent;
1487 };
1488
1489 static void iwl_mvm_tcm_iter(void *_data, u8 *mac, struct ieee80211_vif *vif)
1490 {
1491         struct iwl_mvm_tcm_iter_data *data = _data;
1492         struct iwl_mvm *mvm = data->mvm;
1493         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1494         bool low_latency, prev = mvmvif->low_latency & LOW_LATENCY_TRAFFIC;
1495
1496         if (mvmvif->id >= NUM_MAC_INDEX_DRIVER)
1497                 return;
1498
1499         low_latency = mvm->tcm.result.low_latency[mvmvif->id];
1500
1501         if (!mvm->tcm.result.change[mvmvif->id] &&
1502             prev == low_latency) {
1503                 iwl_mvm_update_quotas(mvm, false, NULL);
1504                 return;
1505         }
1506
1507         if (prev != low_latency) {
1508                 /* this sends traffic load and updates quota as well */
1509                 iwl_mvm_update_low_latency(mvm, vif, low_latency,
1510                                            LOW_LATENCY_TRAFFIC);
1511         } else {
1512                 iwl_mvm_update_quotas(mvm, false, NULL);
1513         }
1514
1515         data->any_sent = true;
1516 }
1517
1518 static void iwl_mvm_tcm_results(struct iwl_mvm *mvm)
1519 {
1520         struct iwl_mvm_tcm_iter_data data = {
1521                 .mvm = mvm,
1522                 .any_sent = false,
1523         };
1524
1525         mutex_lock(&mvm->mutex);
1526
1527         ieee80211_iterate_active_interfaces(
1528                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1529                 iwl_mvm_tcm_iter, &data);
1530
1531         if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN))
1532                 iwl_mvm_config_scan(mvm);
1533
1534         mutex_unlock(&mvm->mutex);
1535 }
1536
1537 static void iwl_mvm_tcm_uapsd_nonagg_detected_wk(struct work_struct *wk)
1538 {
1539         struct iwl_mvm *mvm;
1540         struct iwl_mvm_vif *mvmvif;
1541         struct ieee80211_vif *vif;
1542
1543         mvmvif = container_of(wk, struct iwl_mvm_vif,
1544                               uapsd_nonagg_detected_wk.work);
1545         vif = container_of((void *)mvmvif, struct ieee80211_vif, drv_priv);
1546         mvm = mvmvif->mvm;
1547
1548         if (mvm->tcm.data[mvmvif->id].opened_rx_ba_sessions)
1549                 return;
1550
1551         /* remember that this AP is broken */
1552         memcpy(mvm->uapsd_noagg_bssids[mvm->uapsd_noagg_bssid_write_idx].addr,
1553                vif->bss_conf.bssid, ETH_ALEN);
1554         mvm->uapsd_noagg_bssid_write_idx++;
1555         if (mvm->uapsd_noagg_bssid_write_idx >= IWL_MVM_UAPSD_NOAGG_LIST_LEN)
1556                 mvm->uapsd_noagg_bssid_write_idx = 0;
1557
1558         iwl_mvm_connection_loss(mvm, vif,
1559                                 "AP isn't using AMPDU with uAPSD enabled");
1560 }
1561
1562 static void iwl_mvm_uapsd_agg_disconnect_iter(void *data, u8 *mac,
1563                                               struct ieee80211_vif *vif)
1564 {
1565         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1566         struct iwl_mvm *mvm = mvmvif->mvm;
1567         int *mac_id = data;
1568
1569         if (vif->type != NL80211_IFTYPE_STATION)
1570                 return;
1571
1572         if (mvmvif->id != *mac_id)
1573                 return;
1574
1575         if (!vif->bss_conf.assoc)
1576                 return;
1577
1578         if (!mvmvif->queue_params[IEEE80211_AC_VO].uapsd &&
1579             !mvmvif->queue_params[IEEE80211_AC_VI].uapsd &&
1580             !mvmvif->queue_params[IEEE80211_AC_BE].uapsd &&
1581             !mvmvif->queue_params[IEEE80211_AC_BK].uapsd)
1582                 return;
1583
1584         if (mvm->tcm.data[*mac_id].uapsd_nonagg_detect.detected)
1585                 return;
1586
1587         mvm->tcm.data[*mac_id].uapsd_nonagg_detect.detected = true;
1588         IWL_INFO(mvm,
1589                  "detected AP should do aggregation but isn't, likely due to U-APSD\n");
1590         schedule_delayed_work(&mvmvif->uapsd_nonagg_detected_wk, 15 * HZ);
1591 }
1592
1593 static void iwl_mvm_check_uapsd_agg_expected_tpt(struct iwl_mvm *mvm,
1594                                                  unsigned int elapsed,
1595                                                  int mac)
1596 {
1597         u64 bytes = mvm->tcm.data[mac].uapsd_nonagg_detect.rx_bytes;
1598         u64 tpt;
1599         unsigned long rate;
1600
1601         rate = ewma_rate_read(&mvm->tcm.data[mac].uapsd_nonagg_detect.rate);
1602
1603         if (!rate || mvm->tcm.data[mac].opened_rx_ba_sessions ||
1604             mvm->tcm.data[mac].uapsd_nonagg_detect.detected)
1605                 return;
1606
1607         if (iwl_mvm_has_new_rx_api(mvm)) {
1608                 tpt = 8 * bytes; /* kbps */
1609                 do_div(tpt, elapsed);
1610                 rate *= 1000; /* kbps */
1611                 if (tpt < 22 * rate / 100)
1612                         return;
1613         } else {
1614                 /*
1615                  * the rate here is actually the threshold, in 100Kbps units,
1616                  * so do the needed conversion from bytes to 100Kbps:
1617                  * 100kb = bits / (100 * 1000),
1618                  * 100kbps = 100kb / (msecs / 1000) ==
1619                  *           (bits / (100 * 1000)) / (msecs / 1000) ==
1620                  *           bits / (100 * msecs)
1621                  */
1622                 tpt = (8 * bytes);
1623                 do_div(tpt, elapsed * 100);
1624                 if (tpt < rate)
1625                         return;
1626         }
1627
1628         ieee80211_iterate_active_interfaces_atomic(
1629                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1630                 iwl_mvm_uapsd_agg_disconnect_iter, &mac);
1631 }
1632
1633 static void iwl_mvm_tcm_iterator(void *_data, u8 *mac,
1634                                  struct ieee80211_vif *vif)
1635 {
1636         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1637         u32 *band = _data;
1638
1639         if (!mvmvif->phy_ctxt)
1640                 return;
1641
1642         band[mvmvif->id] = mvmvif->phy_ctxt->channel->band;
1643 }
1644
1645 static unsigned long iwl_mvm_calc_tcm_stats(struct iwl_mvm *mvm,
1646                                             unsigned long ts,
1647                                             bool handle_uapsd)
1648 {
1649         unsigned int elapsed = jiffies_to_msecs(ts - mvm->tcm.ts);
1650         unsigned int uapsd_elapsed =
1651                 jiffies_to_msecs(ts - mvm->tcm.uapsd_nonagg_ts);
1652         u32 total_airtime = 0;
1653         u32 band_airtime[NUM_NL80211_BANDS] = {0};
1654         u32 band[NUM_MAC_INDEX_DRIVER] = {0};
1655         int ac, mac, i;
1656         bool low_latency = false;
1657         enum iwl_mvm_traffic_load load, band_load;
1658         bool handle_ll = time_after(ts, mvm->tcm.ll_ts + MVM_LL_PERIOD);
1659
1660         if (handle_ll)
1661                 mvm->tcm.ll_ts = ts;
1662         if (handle_uapsd)
1663                 mvm->tcm.uapsd_nonagg_ts = ts;
1664
1665         mvm->tcm.result.elapsed = elapsed;
1666
1667         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1668                                                    IEEE80211_IFACE_ITER_NORMAL,
1669                                                    iwl_mvm_tcm_iterator,
1670                                                    &band);
1671
1672         for (mac = 0; mac < NUM_MAC_INDEX_DRIVER; mac++) {
1673                 struct iwl_mvm_tcm_mac *mdata = &mvm->tcm.data[mac];
1674                 u32 vo_vi_pkts = 0;
1675                 u32 airtime = mdata->rx.airtime + mdata->tx.airtime;
1676
1677                 total_airtime += airtime;
1678                 band_airtime[band[mac]] += airtime;
1679
1680                 load = iwl_mvm_tcm_load(mvm, airtime, elapsed);
1681                 mvm->tcm.result.change[mac] = load != mvm->tcm.result.load[mac];
1682                 mvm->tcm.result.load[mac] = load;
1683                 mvm->tcm.result.airtime[mac] = airtime;
1684
1685                 for (ac = IEEE80211_AC_VO; ac <= IEEE80211_AC_VI; ac++)
1686                         vo_vi_pkts += mdata->rx.pkts[ac] +
1687                                       mdata->tx.pkts[ac];
1688
1689                 /* enable immediately with enough packets but defer disabling */
1690                 if (vo_vi_pkts > IWL_MVM_TCM_LOWLAT_ENABLE_THRESH)
1691                         mvm->tcm.result.low_latency[mac] = true;
1692                 else if (handle_ll)
1693                         mvm->tcm.result.low_latency[mac] = false;
1694
1695                 if (handle_ll) {
1696                         /* clear old data */
1697                         memset(&mdata->rx.pkts, 0, sizeof(mdata->rx.pkts));
1698                         memset(&mdata->tx.pkts, 0, sizeof(mdata->tx.pkts));
1699                 }
1700                 low_latency |= mvm->tcm.result.low_latency[mac];
1701
1702                 if (!mvm->tcm.result.low_latency[mac] && handle_uapsd)
1703                         iwl_mvm_check_uapsd_agg_expected_tpt(mvm, uapsd_elapsed,
1704                                                              mac);
1705                 /* clear old data */
1706                 if (handle_uapsd)
1707                         mdata->uapsd_nonagg_detect.rx_bytes = 0;
1708                 memset(&mdata->rx.airtime, 0, sizeof(mdata->rx.airtime));
1709                 memset(&mdata->tx.airtime, 0, sizeof(mdata->tx.airtime));
1710         }
1711
1712         load = iwl_mvm_tcm_load(mvm, total_airtime, elapsed);
1713         mvm->tcm.result.global_change = load != mvm->tcm.result.global_load;
1714         mvm->tcm.result.global_load = load;
1715
1716         for (i = 0; i < NUM_NL80211_BANDS; i++) {
1717                 band_load = iwl_mvm_tcm_load(mvm, band_airtime[i], elapsed);
1718                 mvm->tcm.result.band_load[i] = band_load;
1719         }
1720
1721         /*
1722          * If the current load isn't low we need to force re-evaluation
1723          * in the TCM period, so that we can return to low load if there
1724          * was no traffic at all (and thus iwl_mvm_recalc_tcm didn't get
1725          * triggered by traffic).
1726          */
1727         if (load != IWL_MVM_TRAFFIC_LOW)
1728                 return MVM_TCM_PERIOD;
1729         /*
1730          * If low-latency is active we need to force re-evaluation after
1731          * (the longer) MVM_LL_PERIOD, so that we can disable low-latency
1732          * when there's no traffic at all.
1733          */
1734         if (low_latency)
1735                 return MVM_LL_PERIOD;
1736         /*
1737          * Otherwise, we don't need to run the work struct because we're
1738          * in the default "idle" state - traffic indication is low (which
1739          * also covers the "no traffic" case) and low-latency is disabled
1740          * so there's no state that may need to be disabled when there's
1741          * no traffic at all.
1742          *
1743          * Note that this has no impact on the regular scheduling of the
1744          * updates triggered by traffic - those happen whenever one of the
1745          * two timeouts expire (if there's traffic at all.)
1746          */
1747         return 0;
1748 }
1749
1750 void iwl_mvm_recalc_tcm(struct iwl_mvm *mvm)
1751 {
1752         unsigned long ts = jiffies;
1753         bool handle_uapsd =
1754                 time_after(ts, mvm->tcm.uapsd_nonagg_ts +
1755                                msecs_to_jiffies(IWL_MVM_UAPSD_NONAGG_PERIOD));
1756
1757         spin_lock(&mvm->tcm.lock);
1758         if (mvm->tcm.paused || !time_after(ts, mvm->tcm.ts + MVM_TCM_PERIOD)) {
1759                 spin_unlock(&mvm->tcm.lock);
1760                 return;
1761         }
1762         spin_unlock(&mvm->tcm.lock);
1763
1764         if (handle_uapsd && iwl_mvm_has_new_rx_api(mvm)) {
1765                 mutex_lock(&mvm->mutex);
1766                 if (iwl_mvm_request_statistics(mvm, true))
1767                         handle_uapsd = false;
1768                 mutex_unlock(&mvm->mutex);
1769         }
1770
1771         spin_lock(&mvm->tcm.lock);
1772         /* re-check if somebody else won the recheck race */
1773         if (!mvm->tcm.paused && time_after(ts, mvm->tcm.ts + MVM_TCM_PERIOD)) {
1774                 /* calculate statistics */
1775                 unsigned long work_delay = iwl_mvm_calc_tcm_stats(mvm, ts,
1776                                                                   handle_uapsd);
1777
1778                 /* the memset needs to be visible before the timestamp */
1779                 smp_mb();
1780                 mvm->tcm.ts = ts;
1781                 if (work_delay)
1782                         schedule_delayed_work(&mvm->tcm.work, work_delay);
1783         }
1784         spin_unlock(&mvm->tcm.lock);
1785
1786         iwl_mvm_tcm_results(mvm);
1787 }
1788
1789 void iwl_mvm_tcm_work(struct work_struct *work)
1790 {
1791         struct delayed_work *delayed_work = to_delayed_work(work);
1792         struct iwl_mvm *mvm = container_of(delayed_work, struct iwl_mvm,
1793                                            tcm.work);
1794
1795         iwl_mvm_recalc_tcm(mvm);
1796 }
1797
1798 void iwl_mvm_pause_tcm(struct iwl_mvm *mvm, bool with_cancel)
1799 {
1800         spin_lock_bh(&mvm->tcm.lock);
1801         mvm->tcm.paused = true;
1802         spin_unlock_bh(&mvm->tcm.lock);
1803         if (with_cancel)
1804                 cancel_delayed_work_sync(&mvm->tcm.work);
1805 }
1806
1807 void iwl_mvm_resume_tcm(struct iwl_mvm *mvm)
1808 {
1809         int mac;
1810         bool low_latency = false;
1811
1812         spin_lock_bh(&mvm->tcm.lock);
1813         mvm->tcm.ts = jiffies;
1814         mvm->tcm.ll_ts = jiffies;
1815         for (mac = 0; mac < NUM_MAC_INDEX_DRIVER; mac++) {
1816                 struct iwl_mvm_tcm_mac *mdata = &mvm->tcm.data[mac];
1817
1818                 memset(&mdata->rx.pkts, 0, sizeof(mdata->rx.pkts));
1819                 memset(&mdata->tx.pkts, 0, sizeof(mdata->tx.pkts));
1820                 memset(&mdata->rx.airtime, 0, sizeof(mdata->rx.airtime));
1821                 memset(&mdata->tx.airtime, 0, sizeof(mdata->tx.airtime));
1822
1823                 if (mvm->tcm.result.low_latency[mac])
1824                         low_latency = true;
1825         }
1826         /* The TCM data needs to be reset before "paused" flag changes */
1827         smp_mb();
1828         mvm->tcm.paused = false;
1829
1830         /*
1831          * if the current load is not low or low latency is active, force
1832          * re-evaluation to cover the case of no traffic.
1833          */
1834         if (mvm->tcm.result.global_load > IWL_MVM_TRAFFIC_LOW)
1835                 schedule_delayed_work(&mvm->tcm.work, MVM_TCM_PERIOD);
1836         else if (low_latency)
1837                 schedule_delayed_work(&mvm->tcm.work, MVM_LL_PERIOD);
1838
1839         spin_unlock_bh(&mvm->tcm.lock);
1840 }
1841
1842 void iwl_mvm_tcm_add_vif(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1843 {
1844         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1845
1846         INIT_DELAYED_WORK(&mvmvif->uapsd_nonagg_detected_wk,
1847                           iwl_mvm_tcm_uapsd_nonagg_detected_wk);
1848 }
1849
1850 void iwl_mvm_tcm_rm_vif(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1851 {
1852         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1853
1854         cancel_delayed_work_sync(&mvmvif->uapsd_nonagg_detected_wk);
1855 }
1856
1857
1858 void iwl_mvm_get_sync_time(struct iwl_mvm *mvm, u32 *gp2, u64 *boottime)
1859 {
1860         bool ps_disabled;
1861
1862         lockdep_assert_held(&mvm->mutex);
1863
1864         /* Disable power save when reading GP2 */
1865         ps_disabled = mvm->ps_disabled;
1866         if (!ps_disabled) {
1867                 mvm->ps_disabled = true;
1868                 iwl_mvm_power_update_device(mvm);
1869         }
1870
1871         *gp2 = iwl_read_prph(mvm->trans, DEVICE_SYSTEM_TIME_REG);
1872         *boottime = ktime_get_boot_ns();
1873
1874         if (!ps_disabled) {
1875                 mvm->ps_disabled = ps_disabled;
1876                 iwl_mvm_power_update_device(mvm);
1877         }
1878 }