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