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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  20  * General Public License for more details.
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  22  * The full GNU General Public License is included in this distribution
  23  * in the file called COPYING.
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  25  * Contact Information:
  26  *  Intel Linux Wireless <linuxwifi@intel.com>
  27  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  28  *
  29  * BSD LICENSE
  30  *
  31  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  32  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
  33  * Copyright (C) 2015 - 2017 Intel Deutschland GmbH
  34  * Copyright(c) 2018 Intel Corporation
  35  * All rights reserved.
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  38  * modification, are permitted provided that the following conditions
  39  * are met:
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  41  *  * Redistributions of source code must retain the above copyright
  42  *    notice, this list of conditions and the following disclaimer.
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  44  *    notice, this list of conditions and the following disclaimer in
  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,
  56  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  57  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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  59  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  60  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  61  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  62  *
  63  *****************************************************************************/
  64 #include <net/mac80211.h>
  65
  66 #include "iwl-debug.h"
  67 #include "iwl-io.h"
  68 #include "iwl-prph.h"
  69 #include "iwl-csr.h"
  70 #include "mvm.h"
  71 #include "fw/api/rs.h"
  72
  73 /*
  74  * Will return 0 even if the cmd failed when RFKILL is asserted unless
  75  * CMD_WANT_SKB is set in cmd->flags.
  76  */
  77 int iwl_mvm_send_cmd(struct iwl_mvm *mvm, struct iwl_host_cmd *cmd)
  78 {
  79         int ret;
  80
  81 #if defined(CONFIG_IWLWIFI_DEBUGFS) && defined(CONFIG_PM_SLEEP)
  82         if (WARN_ON(mvm->d3_test_active))
  83                 return -EIO;
  84 #endif
  85
  86         /*
  87          * Synchronous commands from this op-mode must hold
  88          * the mutex, this ensures we don't try to send two
  89          * (or more) synchronous commands at a time.
  90          */
  91         if (!(cmd->flags & CMD_ASYNC)) {
  92                 lockdep_assert_held(&mvm->mutex);
  93                 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 u8 iwl_mvm_mac80211_ac_to_ucode_ac(enum ieee80211_ac_numbers ac)
 242 {
 243         static const u8 mac80211_ac_to_ucode_ac[] = {
 244                 AC_VO,
 245                 AC_VI,
 246                 AC_BE,
 247                 AC_BK
 248         };
 249
 250         return mac80211_ac_to_ucode_ac[ac];
 251 }
 252
 253 void iwl_mvm_rx_fw_error(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
 254 {
 255         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 256         struct iwl_error_resp *err_resp = (void *)pkt->data;
 257
 258         IWL_ERR(mvm, "FW Error notification: type 0x%08X cmd_id 0x%02X\n",
 259                 le32_to_cpu(err_resp->error_type), err_resp->cmd_id);
 260         IWL_ERR(mvm, "FW Error notification: seq 0x%04X service 0x%08X\n",
 261                 le16_to_cpu(err_resp->bad_cmd_seq_num),
 262                 le32_to_cpu(err_resp->error_service));
 263         IWL_ERR(mvm, "FW Error notification: timestamp 0x%016llX\n",
 264                 le64_to_cpu(err_resp->timestamp));
 265 }
 266
 267 /*
 268  * Returns the first antenna as ANT_[ABC], as defined in iwl-config.h.
 269  * The parameter should also be a combination of ANT_[ABC].
 270  */
 271 u8 first_antenna(u8 mask)
 272 {
 273         BUILD_BUG_ON(ANT_A != BIT(0)); /* using ffs is wrong if not */
 274         if (WARN_ON_ONCE(!mask)) /* ffs will return 0 if mask is zeroed */
 275                 return BIT(0);
 276         return BIT(ffs(mask) - 1);
 277 }
 278
 279 /*
 280  * Toggles between TX antennas to send the probe request on.
 281  * Receives the bitmask of valid TX antennas and the *index* used
 282  * for the last TX, and returns the next valid *index* to use.
 283  * In order to set it in the tx_cmd, must do BIT(idx).
 284  */
 285 u8 iwl_mvm_next_antenna(struct iwl_mvm *mvm, u8 valid, u8 last_idx)
 286 {
 287         u8 ind = last_idx;
 288         int i;
 289
 290         for (i = 0; i < MAX_ANT_NUM; i++) {
 291                 ind = (ind + 1) % MAX_ANT_NUM;
 292                 if (valid & BIT(ind))
 293                         return ind;
 294         }
 295
 296         WARN_ONCE(1, "Failed to toggle between antennas 0x%x", valid);
 297         return last_idx;
 298 }
 299
 300 #define FW_SYSASSERT_CPU_MASK 0xf0000000
 301 static const struct {
 302         const char *name;
 303         u8 num;
 304 } advanced_lookup[] = {
 305         { "NMI_INTERRUPT_WDG", 0x34 },
 306         { "SYSASSERT", 0x35 },
 307         { "UCODE_VERSION_MISMATCH", 0x37 },
 308         { "BAD_COMMAND", 0x38 },
 309         { "BAD_COMMAND", 0x39 },
 310         { "NMI_INTERRUPT_DATA_ACTION_PT", 0x3C },
 311         { "FATAL_ERROR", 0x3D },
 312         { "NMI_TRM_HW_ERR", 0x46 },
 313         { "NMI_INTERRUPT_TRM", 0x4C },
 314         { "NMI_INTERRUPT_BREAK_POINT", 0x54 },
 315         { "NMI_INTERRUPT_WDG_RXF_FULL", 0x5C },
 316         { "NMI_INTERRUPT_WDG_NO_RBD_RXF_FULL", 0x64 },
 317         { "NMI_INTERRUPT_HOST", 0x66 },
 318         { "NMI_INTERRUPT_LMAC_FATAL", 0x70 },
 319         { "NMI_INTERRUPT_UMAC_FATAL", 0x71 },
 320         { "NMI_INTERRUPT_OTHER_LMAC_FATAL", 0x73 },
 321         { "NMI_INTERRUPT_ACTION_PT", 0x7C },
 322         { "NMI_INTERRUPT_UNKNOWN", 0x84 },
 323         { "NMI_INTERRUPT_INST_ACTION_PT", 0x86 },
 324         { "ADVANCED_SYSASSERT", 0 },
 325 };
 326
 327 static const char *desc_lookup(u32 num)
 328 {
 329         int i;
 330
 331         for (i = 0; i < ARRAY_SIZE(advanced_lookup) - 1; i++)
 332                 if (advanced_lookup[i].num == (num & ~FW_SYSASSERT_CPU_MASK))
 333                         return advanced_lookup[i].name;
 334
 335         /* No entry matches 'num', so it is the last: ADVANCED_SYSASSERT */
 336         return advanced_lookup[i].name;
 337 }
 338
 339 /*
 340  * Note: This structure is read from the device with IO accesses,
 341  * and the reading already does the endian conversion. As it is
 342  * read with u32-sized accesses, any members with a different size
 343  * need to be ordered correctly though!
 344  */
 345 struct iwl_error_event_table_v1 {
 346         u32 valid;              /* (nonzero) valid, (0) log is empty */
 347         u32 error_id;           /* type of error */
 348         u32 pc;                 /* program counter */
 349         u32 blink1;             /* branch link */
 350         u32 blink2;             /* branch link */
 351         u32 ilink1;             /* interrupt link */
 352         u32 ilink2;             /* interrupt link */
 353         u32 data1;              /* error-specific data */
 354         u32 data2;              /* error-specific data */
 355         u32 data3;              /* error-specific data */
 356         u32 bcon_time;          /* beacon timer */
 357         u32 tsf_low;            /* network timestamp function timer */
 358         u32 tsf_hi;             /* network timestamp function timer */
 359         u32 gp1;                /* GP1 timer register */
 360         u32 gp2;                /* GP2 timer register */
 361         u32 gp3;                /* GP3 timer register */
 362         u32 ucode_ver;          /* uCode version */
 363         u32 hw_ver;             /* HW Silicon version */
 364         u32 brd_ver;            /* HW board version */
 365         u32 log_pc;             /* log program counter */
 366         u32 frame_ptr;          /* frame pointer */
 367         u32 stack_ptr;          /* stack pointer */
 368         u32 hcmd;               /* last host command header */
 369         u32 isr0;               /* isr status register LMPM_NIC_ISR0:
 370                                  * rxtx_flag */
 371         u32 isr1;               /* isr status register LMPM_NIC_ISR1:
 372                                  * host_flag */
 373         u32 isr2;               /* isr status register LMPM_NIC_ISR2:
 374                                  * enc_flag */
 375         u32 isr3;               /* isr status register LMPM_NIC_ISR3:
 376                                  * time_flag */
 377         u32 isr4;               /* isr status register LMPM_NIC_ISR4:
 378                                  * wico interrupt */
 379         u32 isr_pref;           /* isr status register LMPM_NIC_PREF_STAT */
 380         u32 wait_event;         /* wait event() caller address */
 381         u32 l2p_control;        /* L2pControlField */
 382         u32 l2p_duration;       /* L2pDurationField */
 383         u32 l2p_mhvalid;        /* L2pMhValidBits */
 384         u32 l2p_addr_match;     /* L2pAddrMatchStat */
 385         u32 lmpm_pmg_sel;       /* indicate which clocks are turned on
 386                                  * (LMPM_PMG_SEL) */
 387         u32 u_timestamp;        /* indicate when the date and time of the
 388                                  * compilation */
 389         u32 flow_handler;       /* FH read/write pointers, RX credit */
 390 } __packed /* LOG_ERROR_TABLE_API_S_VER_1 */;
 391
 392 struct iwl_error_event_table {
 393         u32 valid;              /* (nonzero) valid, (0) log is empty */
 394         u32 error_id;           /* type of error */
 395         u32 trm_hw_status0;     /* TRM HW status */
 396         u32 trm_hw_status1;     /* TRM HW status */
 397         u32 blink2;             /* branch link */
 398         u32 ilink1;             /* interrupt link */
 399         u32 ilink2;             /* interrupt link */
 400         u32 data1;              /* error-specific data */
 401         u32 data2;              /* error-specific data */
 402         u32 data3;              /* error-specific data */
 403         u32 bcon_time;          /* beacon timer */
 404         u32 tsf_low;            /* network timestamp function timer */
 405         u32 tsf_hi;             /* network timestamp function timer */
 406         u32 gp1;                /* GP1 timer register */
 407         u32 gp2;                /* GP2 timer register */
 408         u32 fw_rev_type;        /* firmware revision type */
 409         u32 major;              /* uCode version major */
 410         u32 minor;              /* uCode version minor */
 411         u32 hw_ver;             /* HW Silicon version */
 412         u32 brd_ver;            /* HW board version */
 413         u32 log_pc;             /* log program counter */
 414         u32 frame_ptr;          /* frame pointer */
 415         u32 stack_ptr;          /* stack pointer */
 416         u32 hcmd;               /* last host command header */
 417         u32 isr0;               /* isr status register LMPM_NIC_ISR0:
 418                                  * rxtx_flag */
 419         u32 isr1;               /* isr status register LMPM_NIC_ISR1:
 420                                  * host_flag */
 421         u32 isr2;               /* isr status register LMPM_NIC_ISR2:
 422                                  * enc_flag */
 423         u32 isr3;               /* isr status register LMPM_NIC_ISR3:
 424                                  * time_flag */
 425         u32 isr4;               /* isr status register LMPM_NIC_ISR4:
 426                                  * wico interrupt */
 427         u32 last_cmd_id;        /* last HCMD id handled by the firmware */
 428         u32 wait_event;         /* wait event() caller address */
 429         u32 l2p_control;        /* L2pControlField */
 430         u32 l2p_duration;       /* L2pDurationField */
 431         u32 l2p_mhvalid;        /* L2pMhValidBits */
 432         u32 l2p_addr_match;     /* L2pAddrMatchStat */
 433         u32 lmpm_pmg_sel;       /* indicate which clocks are turned on
 434                                  * (LMPM_PMG_SEL) */
 435         u32 u_timestamp;        /* indicate when the date and time of the
 436                                  * compilation */
 437         u32 flow_handler;       /* FH read/write pointers, RX credit */
 438 } __packed /* LOG_ERROR_TABLE_API_S_VER_3 */;
 439
 440 /*
 441  * UMAC error struct - relevant starting from family 8000 chip.
 442  * Note: This structure is read from the device with IO accesses,
 443  * and the reading already does the endian conversion. As it is
 444  * read with u32-sized accesses, any members with a different size
 445  * need to be ordered correctly though!
 446  */
 447 struct iwl_umac_error_event_table {
 448         u32 valid;              /* (nonzero) valid, (0) log is empty */
 449         u32 error_id;           /* type of error */
 450         u32 blink1;             /* branch link */
 451         u32 blink2;             /* branch link */
 452         u32 ilink1;             /* interrupt link */
 453         u32 ilink2;             /* interrupt link */
 454         u32 data1;              /* error-specific data */
 455         u32 data2;              /* error-specific data */
 456         u32 data3;              /* error-specific data */
 457         u32 umac_major;
 458         u32 umac_minor;
 459         u32 frame_pointer;      /* core register 27*/
 460         u32 stack_pointer;      /* core register 28 */
 461         u32 cmd_header;         /* latest host cmd sent to UMAC */
 462         u32 nic_isr_pref;       /* ISR status register */
 463 } __packed;
 464
 465 #define ERROR_START_OFFSET  (1 * sizeof(u32))
 466 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
 467
 468 static void iwl_mvm_dump_umac_error_log(struct iwl_mvm *mvm)
 469 {
 470         struct iwl_trans *trans = mvm->trans;
 471         struct iwl_umac_error_event_table table;
 472         u32 base = mvm->trans->dbg.umac_error_event_table;
 473
 474         if (!mvm->support_umac_log &&
 475             !(mvm->trans->dbg.error_event_table_tlv_status &
 476               IWL_ERROR_EVENT_TABLE_UMAC))
 477                 return;
 478
 479         iwl_trans_read_mem_bytes(trans, base, &table, sizeof(table));
 480
 481         if (table.valid)
 482                 mvm->fwrt.dump.umac_err_id = table.error_id;
 483
 484         if (ERROR_START_OFFSET <= table.valid * ERROR_ELEM_SIZE) {
 485                 IWL_ERR(trans, "Start IWL Error Log Dump:\n");
 486                 IWL_ERR(trans, "Status: 0x%08lX, count: %d\n",
 487                         mvm->status, table.valid);
 488         }
 489
 490         IWL_ERR(mvm, "0x%08X | %s\n", table.error_id,
 491                 desc_lookup(table.error_id));
 492         IWL_ERR(mvm, "0x%08X | umac branchlink1\n", table.blink1);
 493         IWL_ERR(mvm, "0x%08X | umac branchlink2\n", table.blink2);
 494         IWL_ERR(mvm, "0x%08X | umac interruptlink1\n", table.ilink1);
 495         IWL_ERR(mvm, "0x%08X | umac interruptlink2\n", table.ilink2);
 496         IWL_ERR(mvm, "0x%08X | umac data1\n", table.data1);
 497         IWL_ERR(mvm, "0x%08X | umac data2\n", table.data2);
 498         IWL_ERR(mvm, "0x%08X | umac data3\n", table.data3);
 499         IWL_ERR(mvm, "0x%08X | umac major\n", table.umac_major);
 500         IWL_ERR(mvm, "0x%08X | umac minor\n", table.umac_minor);
 501         IWL_ERR(mvm, "0x%08X | frame pointer\n", table.frame_pointer);
 502         IWL_ERR(mvm, "0x%08X | stack pointer\n", table.stack_pointer);
 503         IWL_ERR(mvm, "0x%08X | last host cmd\n", table.cmd_header);
 504         IWL_ERR(mvm, "0x%08X | isr status reg\n", table.nic_isr_pref);
 505 }
 506
 507 static void iwl_mvm_dump_lmac_error_log(struct iwl_mvm *mvm, u8 lmac_num)
 508 {
 509         struct iwl_trans *trans = mvm->trans;
 510         struct iwl_error_event_table table;
 511         u32 val, base = mvm->trans->dbg.lmac_error_event_table[lmac_num];
 512
 513         if (mvm->fwrt.cur_fw_img == IWL_UCODE_INIT) {
 514                 if (!base)
 515                         base = mvm->fw->init_errlog_ptr;
 516         } else {
 517                 if (!base)
 518                         base = mvm->fw->inst_errlog_ptr;
 519         }
 520
 521         if (base < 0x400000) {
 522                 IWL_ERR(mvm,
 523                         "Not valid error log pointer 0x%08X for %s uCode\n",
 524                         base,
 525                         (mvm->fwrt.cur_fw_img == IWL_UCODE_INIT)
 526                         ? "Init" : "RT");
 527                 return;
 528         }
 529
 530         /* check if there is a HW error */
 531         val = iwl_trans_read_mem32(trans, base);
 532         if (((val & ~0xf) == 0xa5a5a5a0) || ((val & ~0xf) == 0x5a5a5a50)) {
 533                 int err;
 534
 535                 IWL_ERR(trans, "HW error, resetting before reading\n");
 536
 537                 /* reset the device */
 538                 iwl_trans_sw_reset(trans);
 539
 540                 err = iwl_finish_nic_init(trans);
 541                 if (err)
 542                         return;
 543         }
 544
 545         iwl_trans_read_mem_bytes(trans, base, &table, sizeof(table));
 546
 547         if (table.valid)
 548                 mvm->fwrt.dump.lmac_err_id[lmac_num] = table.error_id;
 549
 550         if (ERROR_START_OFFSET <= table.valid * ERROR_ELEM_SIZE) {
 551                 IWL_ERR(trans, "Start IWL Error Log Dump:\n");
 552                 IWL_ERR(trans, "Status: 0x%08lX, count: %d\n",
 553                         mvm->status, table.valid);
 554         }
 555
 556         /* Do not change this output - scripts rely on it */
 557
 558         IWL_ERR(mvm, "Loaded firmware version: %s\n", mvm->fw->fw_version);
 559
 560         IWL_ERR(mvm, "0x%08X | %-28s\n", table.error_id,
 561                 desc_lookup(table.error_id));
 562         IWL_ERR(mvm, "0x%08X | trm_hw_status0\n", table.trm_hw_status0);
 563         IWL_ERR(mvm, "0x%08X | trm_hw_status1\n", table.trm_hw_status1);
 564         IWL_ERR(mvm, "0x%08X | branchlink2\n", table.blink2);
 565         IWL_ERR(mvm, "0x%08X | interruptlink1\n", table.ilink1);
 566         IWL_ERR(mvm, "0x%08X | interruptlink2\n", table.ilink2);
 567         IWL_ERR(mvm, "0x%08X | data1\n", table.data1);
 568         IWL_ERR(mvm, "0x%08X | data2\n", table.data2);
 569         IWL_ERR(mvm, "0x%08X | data3\n", table.data3);
 570         IWL_ERR(mvm, "0x%08X | beacon time\n", table.bcon_time);
 571         IWL_ERR(mvm, "0x%08X | tsf low\n", table.tsf_low);
 572         IWL_ERR(mvm, "0x%08X | tsf hi\n", table.tsf_hi);
 573         IWL_ERR(mvm, "0x%08X | time gp1\n", table.gp1);
 574         IWL_ERR(mvm, "0x%08X | time gp2\n", table.gp2);
 575         IWL_ERR(mvm, "0x%08X | uCode revision type\n", table.fw_rev_type);
 576         IWL_ERR(mvm, "0x%08X | uCode version major\n", table.major);
 577         IWL_ERR(mvm, "0x%08X | uCode version minor\n", table.minor);
 578         IWL_ERR(mvm, "0x%08X | hw version\n", table.hw_ver);
 579         IWL_ERR(mvm, "0x%08X | board version\n", table.brd_ver);
 580         IWL_ERR(mvm, "0x%08X | hcmd\n", table.hcmd);
 581         IWL_ERR(mvm, "0x%08X | isr0\n", table.isr0);
 582         IWL_ERR(mvm, "0x%08X | isr1\n", table.isr1);
 583         IWL_ERR(mvm, "0x%08X | isr2\n", table.isr2);
 584         IWL_ERR(mvm, "0x%08X | isr3\n", table.isr3);
 585         IWL_ERR(mvm, "0x%08X | isr4\n", table.isr4);
 586         IWL_ERR(mvm, "0x%08X | last cmd Id\n", table.last_cmd_id);
 587         IWL_ERR(mvm, "0x%08X | wait_event\n", table.wait_event);
 588         IWL_ERR(mvm, "0x%08X | l2p_control\n", table.l2p_control);
 589         IWL_ERR(mvm, "0x%08X | l2p_duration\n", table.l2p_duration);
 590         IWL_ERR(mvm, "0x%08X | l2p_mhvalid\n", table.l2p_mhvalid);
 591         IWL_ERR(mvm, "0x%08X | l2p_addr_match\n", table.l2p_addr_match);
 592         IWL_ERR(mvm, "0x%08X | lmpm_pmg_sel\n", table.lmpm_pmg_sel);
 593         IWL_ERR(mvm, "0x%08X | timestamp\n", table.u_timestamp);
 594         IWL_ERR(mvm, "0x%08X | flow_handler\n", table.flow_handler);
 595 }
 596
 597 void iwl_mvm_dump_nic_error_log(struct iwl_mvm *mvm)
 598 {
 599         if (!test_bit(STATUS_DEVICE_ENABLED, &mvm->trans->status)) {
 600                 IWL_ERR(mvm,
 601                         "DEVICE_ENABLED bit is not set. Aborting dump.\n");
 602                 return;
 603         }
 604
 605         iwl_mvm_dump_lmac_error_log(mvm, 0);
 606
 607         if (mvm->trans->dbg.lmac_error_event_table[1])
 608                 iwl_mvm_dump_lmac_error_log(mvm, 1);
 609
 610         iwl_mvm_dump_umac_error_log(mvm);
 611
 612         iwl_fw_error_print_fseq_regs(&mvm->fwrt);
 613 }
 614
 615 int iwl_mvm_reconfig_scd(struct iwl_mvm *mvm, int queue, int fifo, int sta_id,
 616                          int tid, int frame_limit, u16 ssn)
 617 {
 618         struct iwl_scd_txq_cfg_cmd cmd = {
 619                 .scd_queue = queue,
 620                 .action = SCD_CFG_ENABLE_QUEUE,
 621                 .window = frame_limit,
 622                 .sta_id = sta_id,
 623                 .ssn = cpu_to_le16(ssn),
 624                 .tx_fifo = fifo,
 625                 .aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
 626                               queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE),
 627                 .tid = tid,
 628         };
 629         int ret;
 630
 631         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
 632                 return -EINVAL;
 633
 634         if (WARN(mvm->queue_info[queue].tid_bitmap == 0,
 635                  "Trying to reconfig unallocated queue %d\n", queue))
 636                 return -ENXIO;
 637
 638         IWL_DEBUG_TX_QUEUES(mvm, "Reconfig SCD for TXQ #%d\n", queue);
 639
 640         ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd);
 641         WARN_ONCE(ret, "Failed to re-configure queue %d on FIFO %d, ret=%d\n",
 642                   queue, fifo, ret);
 643
 644         return ret;
 645 }
 646
 647 /**
 648  * iwl_mvm_send_lq_cmd() - Send link quality command
 649  * @sync: This command can be sent synchronously.
 650  *
 651  * The link quality command is sent as the last step of station creation.
 652  * This is the special case in which init is set and we call a callback in
 653  * this case to clear the state indicating that station creation is in
 654  * progress.
 655  */
 656 int iwl_mvm_send_lq_cmd(struct iwl_mvm *mvm, struct iwl_lq_cmd *lq)
 657 {
 658         struct iwl_host_cmd cmd = {
 659                 .id = LQ_CMD,
 660                 .len = { sizeof(struct iwl_lq_cmd), },
 661                 .flags = CMD_ASYNC,
 662                 .data = { lq, },
 663         };
 664
 665         if (WARN_ON(lq->sta_id == IWL_MVM_INVALID_STA ||
 666                     iwl_mvm_has_tlc_offload(mvm)))
 667                 return -EINVAL;
 668
 669         return iwl_mvm_send_cmd(mvm, &cmd);
 670 }
 671
 672 /**
 673  * iwl_mvm_update_smps - Get a request to change the SMPS mode
 674  * @req_type: The part of the driver who call for a change.
 675  * @smps_requests: The request to change the SMPS mode.
 676  *
 677  * Get a requst to change the SMPS mode,
 678  * and change it according to all other requests in the driver.
 679  */
 680 void iwl_mvm_update_smps(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 681                          enum iwl_mvm_smps_type_request req_type,
 682                          enum ieee80211_smps_mode smps_request)
 683 {
 684         struct iwl_mvm_vif *mvmvif;
 685         enum ieee80211_smps_mode smps_mode;
 686         int i;
 687
 688         lockdep_assert_held(&mvm->mutex);
 689
 690         /* SMPS is irrelevant for NICs that don't have at least 2 RX antenna */
 691         if (num_of_ant(iwl_mvm_get_valid_rx_ant(mvm)) == 1)
 692                 return;
 693
 694         if (vif->type == NL80211_IFTYPE_AP)
 695                 smps_mode = IEEE80211_SMPS_OFF;
 696         else
 697                 smps_mode = IEEE80211_SMPS_AUTOMATIC;
 698
 699         mvmvif = iwl_mvm_vif_from_mac80211(vif);
 700         mvmvif->smps_requests[req_type] = smps_request;
 701         for (i = 0; i < NUM_IWL_MVM_SMPS_REQ; i++) {
 702                 if (mvmvif->smps_requests[i] == IEEE80211_SMPS_STATIC) {
 703                         smps_mode = IEEE80211_SMPS_STATIC;
 704                         break;
 705                 }
 706                 if (mvmvif->smps_requests[i] == IEEE80211_SMPS_DYNAMIC)
 707                         smps_mode = IEEE80211_SMPS_DYNAMIC;
 708         }
 709
 710         ieee80211_request_smps(vif, smps_mode);
 711 }
 712
 713 int iwl_mvm_request_statistics(struct iwl_mvm *mvm, bool clear)
 714 {
 715         struct iwl_statistics_cmd scmd = {
 716                 .flags = clear ? cpu_to_le32(IWL_STATISTICS_FLG_CLEAR) : 0,
 717         };
 718         struct iwl_host_cmd cmd = {
 719                 .id = STATISTICS_CMD,
 720                 .len[0] = sizeof(scmd),
 721                 .data[0] = &scmd,
 722                 .flags = CMD_WANT_SKB,
 723         };
 724         int ret;
 725
 726         ret = iwl_mvm_send_cmd(mvm, &cmd);
 727         if (ret)
 728                 return ret;
 729
 730         iwl_mvm_handle_rx_statistics(mvm, cmd.resp_pkt);
 731         iwl_free_resp(&cmd);
 732
 733         if (clear)
 734                 iwl_mvm_accu_radio_stats(mvm);
 735
 736         return 0;
 737 }
 738
 739 void iwl_mvm_accu_radio_stats(struct iwl_mvm *mvm)
 740 {
 741         mvm->accu_radio_stats.rx_time += mvm->radio_stats.rx_time;
 742         mvm->accu_radio_stats.tx_time += mvm->radio_stats.tx_time;
 743         mvm->accu_radio_stats.on_time_rf += mvm->radio_stats.on_time_rf;
 744         mvm->accu_radio_stats.on_time_scan += mvm->radio_stats.on_time_scan;
 745 }
 746
 747 static void iwl_mvm_diversity_iter(void *_data, u8 *mac,
 748                                    struct ieee80211_vif *vif)
 749 {
 750         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 751         bool *result = _data;
 752         int i;
 753
 754         for (i = 0; i < NUM_IWL_MVM_SMPS_REQ; i++) {
 755                 if (mvmvif->smps_requests[i] == IEEE80211_SMPS_STATIC ||
 756                     mvmvif->smps_requests[i] == IEEE80211_SMPS_DYNAMIC)
 757                         *result = false;
 758         }
 759 }
 760
 761 bool iwl_mvm_rx_diversity_allowed(struct iwl_mvm *mvm)
 762 {
 763         bool result = true;
 764
 765         lockdep_assert_held(&mvm->mutex);
 766
 767         if (num_of_ant(iwl_mvm_get_valid_rx_ant(mvm)) == 1)
 768                 return false;
 769
 770         if (mvm->cfg->rx_with_siso_diversity)
 771                 return false;
 772
 773         ieee80211_iterate_active_interfaces_atomic(
 774                         mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
 775                         iwl_mvm_diversity_iter, &result);
 776
 777         return result;
 778 }
 779
 780 void iwl_mvm_send_low_latency_cmd(struct iwl_mvm *mvm,
 781                                   bool low_latency, u16 mac_id)
 782 {
 783         struct iwl_mac_low_latency_cmd cmd = {
 784                 .mac_id = cpu_to_le32(mac_id)
 785         };
 786
 787         if (!fw_has_capa(&mvm->fw->ucode_capa,
 788                          IWL_UCODE_TLV_CAPA_DYNAMIC_QUOTA))
 789                 return;
 790
 791         if (low_latency) {
 792                 /* currently we don't care about the direction */
 793                 cmd.low_latency_rx = 1;
 794                 cmd.low_latency_tx = 1;
 795         }
 796
 797         if (iwl_mvm_send_cmd_pdu(mvm, iwl_cmd_id(LOW_LATENCY_CMD,
 798                                                  MAC_CONF_GROUP, 0),
 799                                  0, sizeof(cmd), &cmd))
 800                 IWL_ERR(mvm, "Failed to send low latency command\n");
 801 }
 802
 803 int iwl_mvm_update_low_latency(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 804                                bool low_latency,
 805                                enum iwl_mvm_low_latency_cause cause)
 806 {
 807         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 808         int res;
 809         bool prev;
 810
 811         lockdep_assert_held(&mvm->mutex);
 812
 813         prev = iwl_mvm_vif_low_latency(mvmvif);
 814         iwl_mvm_vif_set_low_latency(mvmvif, low_latency, cause);
 815
 816         low_latency = iwl_mvm_vif_low_latency(mvmvif);
 817
 818         if (low_latency == prev)
 819                 return 0;
 820
 821         iwl_mvm_send_low_latency_cmd(mvm, low_latency, mvmvif->id);
 822
 823         res = iwl_mvm_update_quotas(mvm, false, NULL);
 824         if (res)
 825                 return res;
 826
 827         iwl_mvm_bt_coex_vif_change(mvm);
 828
 829         return iwl_mvm_power_update_mac(mvm);
 830 }
 831
 832 struct iwl_mvm_low_latency_iter {
 833         bool result;
 834         bool result_per_band[NUM_NL80211_BANDS];
 835 };
 836
 837 static void iwl_mvm_ll_iter(void *_data, u8 *mac, struct ieee80211_vif *vif)
 838 {
 839         struct iwl_mvm_low_latency_iter *result = _data;
 840         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 841         enum nl80211_band band;
 842
 843         if (iwl_mvm_vif_low_latency(mvmvif)) {
 844                 result->result = true;
 845
 846                 if (!mvmvif->phy_ctxt)
 847                         return;
 848
 849                 band = mvmvif->phy_ctxt->channel->band;
 850                 result->result_per_band[band] = true;
 851         }
 852 }
 853
 854 bool iwl_mvm_low_latency(struct iwl_mvm *mvm)
 855 {
 856         struct iwl_mvm_low_latency_iter data = {};
 857
 858         ieee80211_iterate_active_interfaces_atomic(
 859                         mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
 860                         iwl_mvm_ll_iter, &data);
 861
 862         return data.result;
 863 }
 864
 865 bool iwl_mvm_low_latency_band(struct iwl_mvm *mvm, enum nl80211_band band)
 866 {
 867         struct iwl_mvm_low_latency_iter data = {};
 868
 869         ieee80211_iterate_active_interfaces_atomic(
 870                         mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
 871                         iwl_mvm_ll_iter, &data);
 872
 873         return data.result_per_band[band];
 874 }
 875
 876 struct iwl_bss_iter_data {
 877         struct ieee80211_vif *vif;
 878         bool error;
 879 };
 880
 881 static void iwl_mvm_bss_iface_iterator(void *_data, u8 *mac,
 882                                        struct ieee80211_vif *vif)
 883 {
 884         struct iwl_bss_iter_data *data = _data;
 885
 886         if (vif->type != NL80211_IFTYPE_STATION || vif->p2p)
 887                 return;
 888
 889         if (data->vif) {
 890                 data->error = true;
 891                 return;
 892         }
 893
 894         data->vif = vif;
 895 }
 896
 897 struct ieee80211_vif *iwl_mvm_get_bss_vif(struct iwl_mvm *mvm)
 898 {
 899         struct iwl_bss_iter_data bss_iter_data = {};
 900
 901         ieee80211_iterate_active_interfaces_atomic(
 902                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
 903                 iwl_mvm_bss_iface_iterator, &bss_iter_data);
 904
 905         if (bss_iter_data.error) {
 906                 IWL_ERR(mvm, "More than one managed interface active!\n");
 907                 return ERR_PTR(-EINVAL);
 908         }
 909
 910         return bss_iter_data.vif;
 911 }
 912
 913 struct iwl_sta_iter_data {
 914         bool assoc;
 915 };
 916
 917 static void iwl_mvm_sta_iface_iterator(void *_data, u8 *mac,
 918                                        struct ieee80211_vif *vif)
 919 {
 920         struct iwl_sta_iter_data *data = _data;
 921
 922         if (vif->type != NL80211_IFTYPE_STATION)
 923                 return;
 924
 925         if (vif->bss_conf.assoc)
 926                 data->assoc = true;
 927 }
 928
 929 bool iwl_mvm_is_vif_assoc(struct iwl_mvm *mvm)
 930 {
 931         struct iwl_sta_iter_data data = {
 932                 .assoc = false,
 933         };
 934
 935         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
 936                                                    IEEE80211_IFACE_ITER_NORMAL,
 937                                                    iwl_mvm_sta_iface_iterator,
 938                                                    &data);
 939         return data.assoc;
 940 }
 941
 942 unsigned int iwl_mvm_get_wd_timeout(struct iwl_mvm *mvm,
 943                                     struct ieee80211_vif *vif,
 944                                     bool tdls, bool cmd_q)
 945 {
 946         struct iwl_fw_dbg_trigger_tlv *trigger;
 947         struct iwl_fw_dbg_trigger_txq_timer *txq_timer;
 948         unsigned int default_timeout =
 949                 cmd_q ? IWL_DEF_WD_TIMEOUT : mvm->cfg->base_params->wd_timeout;
 950
 951         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_TXQ_TIMERS)) {
 952                 /*
 953                  * We can't know when the station is asleep or awake, so we
 954                  * must disable the queue hang detection.
 955                  */
 956                 if (fw_has_capa(&mvm->fw->ucode_capa,
 957                                 IWL_UCODE_TLV_CAPA_STA_PM_NOTIF) &&
 958                     vif && vif->type == NL80211_IFTYPE_AP)
 959                         return IWL_WATCHDOG_DISABLED;
 960                 return iwlmvm_mod_params.tfd_q_hang_detect ?
 961                         default_timeout : IWL_WATCHDOG_DISABLED;
 962         }
 963
 964         trigger = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_TXQ_TIMERS);
 965         txq_timer = (void *)trigger->data;
 966
 967         if (tdls)
 968                 return le32_to_cpu(txq_timer->tdls);
 969
 970         if (cmd_q)
 971                 return le32_to_cpu(txq_timer->command_queue);
 972
 973         if (WARN_ON(!vif))
 974                 return default_timeout;
 975
 976         switch (ieee80211_vif_type_p2p(vif)) {
 977         case NL80211_IFTYPE_ADHOC:
 978                 return le32_to_cpu(txq_timer->ibss);
 979         case NL80211_IFTYPE_STATION:
 980                 return le32_to_cpu(txq_timer->bss);
 981         case NL80211_IFTYPE_AP:
 982                 return le32_to_cpu(txq_timer->softap);
 983         case NL80211_IFTYPE_P2P_CLIENT:
 984                 return le32_to_cpu(txq_timer->p2p_client);
 985         case NL80211_IFTYPE_P2P_GO:
 986                 return le32_to_cpu(txq_timer->p2p_go);
 987         case NL80211_IFTYPE_P2P_DEVICE:
 988                 return le32_to_cpu(txq_timer->p2p_device);
 989         case NL80211_IFTYPE_MONITOR:
 990                 return default_timeout;
 991         default:
 992                 WARN_ON(1);
 993                 return mvm->cfg->base_params->wd_timeout;
 994         }
 995 }
 996
 997 void iwl_mvm_connection_loss(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 998                              const char *errmsg)
 999 {
1000         struct iwl_fw_dbg_trigger_tlv *trig;
1001         struct iwl_fw_dbg_trigger_mlme *trig_mlme;
1002
1003         trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, ieee80211_vif_to_wdev(vif),
1004                                      FW_DBG_TRIGGER_MLME);
1005         if (!trig)
1006                 goto out;
1007
1008         trig_mlme = (void *)trig->data;
1009
1010         if (trig_mlme->stop_connection_loss &&
1011             --trig_mlme->stop_connection_loss)
1012                 goto out;
1013
1014         iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, "%s", errmsg);
1015
1016 out:
1017         ieee80211_connection_loss(vif);
1018 }
1019
1020 void iwl_mvm_event_frame_timeout_callback(struct iwl_mvm *mvm,
1021                                           struct ieee80211_vif *vif,
1022                                           const struct ieee80211_sta *sta,
1023                                           u16 tid)
1024 {
1025         struct iwl_fw_dbg_trigger_tlv *trig;
1026         struct iwl_fw_dbg_trigger_ba *ba_trig;
1027
1028         trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, ieee80211_vif_to_wdev(vif),
1029                                      FW_DBG_TRIGGER_BA);
1030         if (!trig)
1031                 return;
1032
1033         ba_trig = (void *)trig->data;
1034
1035         if (!(le16_to_cpu(ba_trig->frame_timeout) & BIT(tid)))
1036                 return;
1037
1038         iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
1039                                 "Frame from %pM timed out, tid %d",
1040                                 sta->addr, tid);
1041 }
1042
1043 u8 iwl_mvm_tcm_load_percentage(u32 airtime, u32 elapsed)
1044 {
1045         if (!elapsed)
1046                 return 0;
1047
1048         return (100 * airtime / elapsed) / USEC_PER_MSEC;
1049 }
1050
1051 static enum iwl_mvm_traffic_load
1052 iwl_mvm_tcm_load(struct iwl_mvm *mvm, u32 airtime, unsigned long elapsed)
1053 {
1054         u8 load = iwl_mvm_tcm_load_percentage(airtime, elapsed);
1055
1056         if (load > IWL_MVM_TCM_LOAD_HIGH_THRESH)
1057                 return IWL_MVM_TRAFFIC_HIGH;
1058         if (load > IWL_MVM_TCM_LOAD_MEDIUM_THRESH)
1059                 return IWL_MVM_TRAFFIC_MEDIUM;
1060
1061         return IWL_MVM_TRAFFIC_LOW;
1062 }
1063
1064 struct iwl_mvm_tcm_iter_data {
1065         struct iwl_mvm *mvm;
1066         bool any_sent;
1067 };
1068
1069 static void iwl_mvm_tcm_iter(void *_data, u8 *mac, struct ieee80211_vif *vif)
1070 {
1071         struct iwl_mvm_tcm_iter_data *data = _data;
1072         struct iwl_mvm *mvm = data->mvm;
1073         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1074         bool low_latency, prev = mvmvif->low_latency & LOW_LATENCY_TRAFFIC;
1075
1076         if (mvmvif->id >= NUM_MAC_INDEX_DRIVER)
1077                 return;
1078
1079         low_latency = mvm->tcm.result.low_latency[mvmvif->id];
1080
1081         if (!mvm->tcm.result.change[mvmvif->id] &&
1082             prev == low_latency) {
1083                 iwl_mvm_update_quotas(mvm, false, NULL);
1084                 return;
1085         }
1086
1087         if (prev != low_latency) {
1088                 /* this sends traffic load and updates quota as well */
1089                 iwl_mvm_update_low_latency(mvm, vif, low_latency,
1090                                            LOW_LATENCY_TRAFFIC);
1091         } else {
1092                 iwl_mvm_update_quotas(mvm, false, NULL);
1093         }
1094
1095         data->any_sent = true;
1096 }
1097
1098 static void iwl_mvm_tcm_results(struct iwl_mvm *mvm)
1099 {
1100         struct iwl_mvm_tcm_iter_data data = {
1101                 .mvm = mvm,
1102                 .any_sent = false,
1103         };
1104
1105         mutex_lock(&mvm->mutex);
1106
1107         ieee80211_iterate_active_interfaces(
1108                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1109                 iwl_mvm_tcm_iter, &data);
1110
1111         if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN))
1112                 iwl_mvm_config_scan(mvm);
1113
1114         mutex_unlock(&mvm->mutex);
1115 }
1116
1117 static void iwl_mvm_tcm_uapsd_nonagg_detected_wk(struct work_struct *wk)
1118 {
1119         struct iwl_mvm *mvm;
1120         struct iwl_mvm_vif *mvmvif;
1121         struct ieee80211_vif *vif;
1122
1123         mvmvif = container_of(wk, struct iwl_mvm_vif,
1124                               uapsd_nonagg_detected_wk.work);
1125         vif = container_of((void *)mvmvif, struct ieee80211_vif, drv_priv);
1126         mvm = mvmvif->mvm;
1127
1128         if (mvm->tcm.data[mvmvif->id].opened_rx_ba_sessions)
1129                 return;
1130
1131         /* remember that this AP is broken */
1132         memcpy(mvm->uapsd_noagg_bssids[mvm->uapsd_noagg_bssid_write_idx].addr,
1133                vif->bss_conf.bssid, ETH_ALEN);
1134         mvm->uapsd_noagg_bssid_write_idx++;
1135         if (mvm->uapsd_noagg_bssid_write_idx >= IWL_MVM_UAPSD_NOAGG_LIST_LEN)
1136                 mvm->uapsd_noagg_bssid_write_idx = 0;
1137
1138         iwl_mvm_connection_loss(mvm, vif,
1139                                 "AP isn't using AMPDU with uAPSD enabled");
1140 }
1141
1142 static void iwl_mvm_uapsd_agg_disconnect(struct iwl_mvm *mvm,
1143                                          struct ieee80211_vif *vif)
1144 {
1145         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1146
1147         if (vif->type != NL80211_IFTYPE_STATION)
1148                 return;
1149
1150         if (!vif->bss_conf.assoc)
1151                 return;
1152
1153         if (!mvmvif->queue_params[IEEE80211_AC_VO].uapsd &&
1154             !mvmvif->queue_params[IEEE80211_AC_VI].uapsd &&
1155             !mvmvif->queue_params[IEEE80211_AC_BE].uapsd &&
1156             !mvmvif->queue_params[IEEE80211_AC_BK].uapsd)
1157                 return;
1158
1159         if (mvm->tcm.data[mvmvif->id].uapsd_nonagg_detect.detected)
1160                 return;
1161
1162         mvm->tcm.data[mvmvif->id].uapsd_nonagg_detect.detected = true;
1163         IWL_INFO(mvm,
1164                  "detected AP should do aggregation but isn't, likely due to U-APSD\n");
1165         schedule_delayed_work(&mvmvif->uapsd_nonagg_detected_wk, 15 * HZ);
1166 }
1167
1168 static void iwl_mvm_check_uapsd_agg_expected_tpt(struct iwl_mvm *mvm,
1169                                                  unsigned int elapsed,
1170                                                  int mac)
1171 {
1172         u64 bytes = mvm->tcm.data[mac].uapsd_nonagg_detect.rx_bytes;
1173         u64 tpt;
1174         unsigned long rate;
1175         struct ieee80211_vif *vif;
1176
1177         rate = ewma_rate_read(&mvm->tcm.data[mac].uapsd_nonagg_detect.rate);
1178
1179         if (!rate || mvm->tcm.data[mac].opened_rx_ba_sessions ||
1180             mvm->tcm.data[mac].uapsd_nonagg_detect.detected)
1181                 return;
1182
1183         if (iwl_mvm_has_new_rx_api(mvm)) {
1184                 tpt = 8 * bytes; /* kbps */
1185                 do_div(tpt, elapsed);
1186                 rate *= 1000; /* kbps */
1187                 if (tpt < 22 * rate / 100)
1188                         return;
1189         } else {
1190                 /*
1191                  * the rate here is actually the threshold, in 100Kbps units,
1192                  * so do the needed conversion from bytes to 100Kbps:
1193                  * 100kb = bits / (100 * 1000),
1194                  * 100kbps = 100kb / (msecs / 1000) ==
1195                  *           (bits / (100 * 1000)) / (msecs / 1000) ==
1196                  *           bits / (100 * msecs)
1197                  */
1198                 tpt = (8 * bytes);
1199                 do_div(tpt, elapsed * 100);
1200                 if (tpt < rate)
1201                         return;
1202         }
1203
1204         rcu_read_lock();
1205         vif = rcu_dereference(mvm->vif_id_to_mac[mac]);
1206         if (vif)
1207                 iwl_mvm_uapsd_agg_disconnect(mvm, vif);
1208         rcu_read_unlock();
1209 }
1210
1211 static void iwl_mvm_tcm_iterator(void *_data, u8 *mac,
1212                                  struct ieee80211_vif *vif)
1213 {
1214         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1215         u32 *band = _data;
1216
1217         if (!mvmvif->phy_ctxt)
1218                 return;
1219
1220         band[mvmvif->id] = mvmvif->phy_ctxt->channel->band;
1221 }
1222
1223 static unsigned long iwl_mvm_calc_tcm_stats(struct iwl_mvm *mvm,
1224                                             unsigned long ts,
1225                                             bool handle_uapsd)
1226 {
1227         unsigned int elapsed = jiffies_to_msecs(ts - mvm->tcm.ts);
1228         unsigned int uapsd_elapsed =
1229                 jiffies_to_msecs(ts - mvm->tcm.uapsd_nonagg_ts);
1230         u32 total_airtime = 0;
1231         u32 band_airtime[NUM_NL80211_BANDS] = {0};
1232         u32 band[NUM_MAC_INDEX_DRIVER] = {0};
1233         int ac, mac, i;
1234         bool low_latency = false;
1235         enum iwl_mvm_traffic_load load, band_load;
1236         bool handle_ll = time_after(ts, mvm->tcm.ll_ts + MVM_LL_PERIOD);
1237
1238         if (handle_ll)
1239                 mvm->tcm.ll_ts = ts;
1240         if (handle_uapsd)
1241                 mvm->tcm.uapsd_nonagg_ts = ts;
1242
1243         mvm->tcm.result.elapsed = elapsed;
1244
1245         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1246                                                    IEEE80211_IFACE_ITER_NORMAL,
1247                                                    iwl_mvm_tcm_iterator,
1248                                                    &band);
1249
1250         for (mac = 0; mac < NUM_MAC_INDEX_DRIVER; mac++) {
1251                 struct iwl_mvm_tcm_mac *mdata = &mvm->tcm.data[mac];
1252                 u32 vo_vi_pkts = 0;
1253                 u32 airtime = mdata->rx.airtime + mdata->tx.airtime;
1254
1255                 total_airtime += airtime;
1256                 band_airtime[band[mac]] += airtime;
1257
1258                 load = iwl_mvm_tcm_load(mvm, airtime, elapsed);
1259                 mvm->tcm.result.change[mac] = load != mvm->tcm.result.load[mac];
1260                 mvm->tcm.result.load[mac] = load;
1261                 mvm->tcm.result.airtime[mac] = airtime;
1262
1263                 for (ac = IEEE80211_AC_VO; ac <= IEEE80211_AC_VI; ac++)
1264                         vo_vi_pkts += mdata->rx.pkts[ac] +
1265                                       mdata->tx.pkts[ac];
1266
1267                 /* enable immediately with enough packets but defer disabling */
1268                 if (vo_vi_pkts > IWL_MVM_TCM_LOWLAT_ENABLE_THRESH)
1269                         mvm->tcm.result.low_latency[mac] = true;
1270                 else if (handle_ll)
1271                         mvm->tcm.result.low_latency[mac] = false;
1272
1273                 if (handle_ll) {
1274                         /* clear old data */
1275                         memset(&mdata->rx.pkts, 0, sizeof(mdata->rx.pkts));
1276                         memset(&mdata->tx.pkts, 0, sizeof(mdata->tx.pkts));
1277                 }
1278                 low_latency |= mvm->tcm.result.low_latency[mac];
1279
1280                 if (!mvm->tcm.result.low_latency[mac] && handle_uapsd)
1281                         iwl_mvm_check_uapsd_agg_expected_tpt(mvm, uapsd_elapsed,
1282                                                              mac);
1283                 /* clear old data */
1284                 if (handle_uapsd)
1285                         mdata->uapsd_nonagg_detect.rx_bytes = 0;
1286                 memset(&mdata->rx.airtime, 0, sizeof(mdata->rx.airtime));
1287                 memset(&mdata->tx.airtime, 0, sizeof(mdata->tx.airtime));
1288         }
1289
1290         load = iwl_mvm_tcm_load(mvm, total_airtime, elapsed);
1291         mvm->tcm.result.global_change = load != mvm->tcm.result.global_load;
1292         mvm->tcm.result.global_load = load;
1293
1294         for (i = 0; i < NUM_NL80211_BANDS; i++) {
1295                 band_load = iwl_mvm_tcm_load(mvm, band_airtime[i], elapsed);
1296                 mvm->tcm.result.band_load[i] = band_load;
1297         }
1298
1299         /*
1300          * If the current load isn't low we need to force re-evaluation
1301          * in the TCM period, so that we can return to low load if there
1302          * was no traffic at all (and thus iwl_mvm_recalc_tcm didn't get
1303          * triggered by traffic).
1304          */
1305         if (load != IWL_MVM_TRAFFIC_LOW)
1306                 return MVM_TCM_PERIOD;
1307         /*
1308          * If low-latency is active we need to force re-evaluation after
1309          * (the longer) MVM_LL_PERIOD, so that we can disable low-latency
1310          * when there's no traffic at all.
1311          */
1312         if (low_latency)
1313                 return MVM_LL_PERIOD;
1314         /*
1315          * Otherwise, we don't need to run the work struct because we're
1316          * in the default "idle" state - traffic indication is low (which
1317          * also covers the "no traffic" case) and low-latency is disabled
1318          * so there's no state that may need to be disabled when there's
1319          * no traffic at all.
1320          *
1321          * Note that this has no impact on the regular scheduling of the
1322          * updates triggered by traffic - those happen whenever one of the
1323          * two timeouts expire (if there's traffic at all.)
1324          */
1325         return 0;
1326 }
1327
1328 void iwl_mvm_recalc_tcm(struct iwl_mvm *mvm)
1329 {
1330         unsigned long ts = jiffies;
1331         bool handle_uapsd =
1332                 time_after(ts, mvm->tcm.uapsd_nonagg_ts +
1333                                msecs_to_jiffies(IWL_MVM_UAPSD_NONAGG_PERIOD));
1334
1335         spin_lock(&mvm->tcm.lock);
1336         if (mvm->tcm.paused || !time_after(ts, mvm->tcm.ts + MVM_TCM_PERIOD)) {
1337                 spin_unlock(&mvm->tcm.lock);
1338                 return;
1339         }
1340         spin_unlock(&mvm->tcm.lock);
1341
1342         if (handle_uapsd && iwl_mvm_has_new_rx_api(mvm)) {
1343                 mutex_lock(&mvm->mutex);
1344                 if (iwl_mvm_request_statistics(mvm, true))
1345                         handle_uapsd = false;
1346                 mutex_unlock(&mvm->mutex);
1347         }
1348
1349         spin_lock(&mvm->tcm.lock);
1350         /* re-check if somebody else won the recheck race */
1351         if (!mvm->tcm.paused && time_after(ts, mvm->tcm.ts + MVM_TCM_PERIOD)) {
1352                 /* calculate statistics */
1353                 unsigned long work_delay = iwl_mvm_calc_tcm_stats(mvm, ts,
1354                                                                   handle_uapsd);
1355
1356                 /* the memset needs to be visible before the timestamp */
1357                 smp_mb();
1358                 mvm->tcm.ts = ts;
1359                 if (work_delay)
1360                         schedule_delayed_work(&mvm->tcm.work, work_delay);
1361         }
1362         spin_unlock(&mvm->tcm.lock);
1363
1364         iwl_mvm_tcm_results(mvm);
1365 }
1366
1367 void iwl_mvm_tcm_work(struct work_struct *work)
1368 {
1369         struct delayed_work *delayed_work = to_delayed_work(work);
1370         struct iwl_mvm *mvm = container_of(delayed_work, struct iwl_mvm,
1371                                            tcm.work);
1372
1373         iwl_mvm_recalc_tcm(mvm);
1374 }
1375
1376 void iwl_mvm_pause_tcm(struct iwl_mvm *mvm, bool with_cancel)
1377 {
1378         spin_lock_bh(&mvm->tcm.lock);
1379         mvm->tcm.paused = true;
1380         spin_unlock_bh(&mvm->tcm.lock);
1381         if (with_cancel)
1382                 cancel_delayed_work_sync(&mvm->tcm.work);
1383 }
1384
1385 void iwl_mvm_resume_tcm(struct iwl_mvm *mvm)
1386 {
1387         int mac;
1388         bool low_latency = false;
1389
1390         spin_lock_bh(&mvm->tcm.lock);
1391         mvm->tcm.ts = jiffies;
1392         mvm->tcm.ll_ts = jiffies;
1393         for (mac = 0; mac < NUM_MAC_INDEX_DRIVER; mac++) {
1394                 struct iwl_mvm_tcm_mac *mdata = &mvm->tcm.data[mac];
1395
1396                 memset(&mdata->rx.pkts, 0, sizeof(mdata->rx.pkts));
1397                 memset(&mdata->tx.pkts, 0, sizeof(mdata->tx.pkts));
1398                 memset(&mdata->rx.airtime, 0, sizeof(mdata->rx.airtime));
1399                 memset(&mdata->tx.airtime, 0, sizeof(mdata->tx.airtime));
1400
1401                 if (mvm->tcm.result.low_latency[mac])
1402                         low_latency = true;
1403         }
1404         /* The TCM data needs to be reset before "paused" flag changes */
1405         smp_mb();
1406         mvm->tcm.paused = false;
1407
1408         /*
1409          * if the current load is not low or low latency is active, force
1410          * re-evaluation to cover the case of no traffic.
1411          */
1412         if (mvm->tcm.result.global_load > IWL_MVM_TRAFFIC_LOW)
1413                 schedule_delayed_work(&mvm->tcm.work, MVM_TCM_PERIOD);
1414         else if (low_latency)
1415                 schedule_delayed_work(&mvm->tcm.work, MVM_LL_PERIOD);
1416
1417         spin_unlock_bh(&mvm->tcm.lock);
1418 }
1419
1420 void iwl_mvm_tcm_add_vif(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1421 {
1422         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1423
1424         INIT_DELAYED_WORK(&mvmvif->uapsd_nonagg_detected_wk,
1425                           iwl_mvm_tcm_uapsd_nonagg_detected_wk);
1426 }
1427
1428 void iwl_mvm_tcm_rm_vif(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1429 {
1430         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1431
1432         cancel_delayed_work_sync(&mvmvif->uapsd_nonagg_detected_wk);
1433 }
1434
1435 u32 iwl_mvm_get_systime(struct iwl_mvm *mvm)
1436 {
1437         u32 reg_addr = DEVICE_SYSTEM_TIME_REG;
1438
1439         if (mvm->trans->cfg->device_family >= IWL_DEVICE_FAMILY_22000 &&
1440             mvm->trans->cfg->gp2_reg_addr)
1441                 reg_addr = mvm->trans->cfg->gp2_reg_addr;
1442
1443         return iwl_read_prph(mvm->trans, reg_addr);
1444 }
1445
1446 void iwl_mvm_get_sync_time(struct iwl_mvm *mvm, u32 *gp2, u64 *boottime)
1447 {
1448         bool ps_disabled;
1449
1450         lockdep_assert_held(&mvm->mutex);
1451
1452         /* Disable power save when reading GP2 */
1453         ps_disabled = mvm->ps_disabled;
1454         if (!ps_disabled) {
1455                 mvm->ps_disabled = true;
1456                 iwl_mvm_power_update_device(mvm);
1457         }
1458
1459         *gp2 = iwl_mvm_get_systime(mvm);
1460         *boottime = ktime_get_boottime_ns();
1461
1462         if (!ps_disabled) {
1463                 mvm->ps_disabled = ps_disabled;
1464                 iwl_mvm_power_update_device(mvm);
1465         }
1466 }