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

   1 /******************************************************************************
   2  *
   3  * This file is provided under a dual BSD/GPLv2 license.  When using or
   4  * redistributing this file, you may do so under either license.
   5  *
   6  * GPL LICENSE SUMMARY
   7  *
   8  * Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved.
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of version 2 of the GNU General Public License as
  12  * published by the Free Software Foundation.
  13  *
  14  * This program is distributed in the hope that it will be useful, but
  15  * WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  22  * USA
  23  *
  24  * The full GNU General Public License is included in this distribution
  25  * in the file called COPYING.
  26  *
  27  * Contact Information:
  28  *  Intel Linux Wireless <ilw@linux.intel.com>
  29  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  30  *
  31  * BSD LICENSE
  32  *
  33  * Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved.
  34  * All rights reserved.
  35  *
  36  * Redistribution and use in source and binary forms, with or without
  37  * modification, are permitted provided that the following conditions
  38  * are met:
  39  *
  40  *  * Redistributions of source code must retain the above copyright
  41  *    notice, this list of conditions and the following disclaimer.
  42  *  * Redistributions in binary form must reproduce the above copyright
  43  *    notice, this list of conditions and the following disclaimer in
  44  *    the documentation and/or other materials provided with the
  45  *    distribution.
  46  *  * Neither the name Intel Corporation nor the names of its
  47  *    contributors may be used to endorse or promote products derived
  48  *    from this software without specific prior written permission.
  49  *
  50  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  51  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  52  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  53  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  54  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  55  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  56  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  57  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  58  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  59  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  60  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  61  *
  62  *****************************************************************************/
  63 #include <net/mac80211.h>
  64
  65 #include "iwl-debug.h"
  66 #include "iwl-io.h"
  67
  68 #include "mvm.h"
  69 #include "fw-api-rs.h"
  70
  71 /*
  72  * Will return 0 even if the cmd failed when RFKILL is asserted unless
  73  * CMD_WANT_SKB is set in cmd->flags.
  74  */
  75 int iwl_mvm_send_cmd(struct iwl_mvm *mvm, struct iwl_host_cmd *cmd)
  76 {
  77         int ret;
  78
  79         /*
  80          * Synchronous commands from this op-mode must hold
  81          * the mutex, this ensures we don't try to send two
  82          * (or more) synchronous commands at a time.
  83          */
  84         if (!(cmd->flags & CMD_ASYNC))
  85                 lockdep_assert_held(&mvm->mutex);
  86
  87         ret = iwl_trans_send_cmd(mvm->trans, cmd);
  88
  89         /*
  90          * If the caller wants the SKB, then don't hide any problems, the
  91          * caller might access the response buffer which will be NULL if
  92          * the command failed.
  93          */
  94         if (cmd->flags & CMD_WANT_SKB)
  95                 return ret;
  96
  97         /* Silently ignore failures if RFKILL is asserted */
  98         if (!ret || ret == -ERFKILL)
  99                 return 0;
 100         return ret;
 101 }
 102
 103 int iwl_mvm_send_cmd_pdu(struct iwl_mvm *mvm, u8 id,
 104                          u32 flags, u16 len, const void *data)
 105 {
 106         struct iwl_host_cmd cmd = {
 107                 .id = id,
 108                 .len = { len, },
 109                 .data = { data, },
 110                 .flags = flags,
 111         };
 112
 113         return iwl_mvm_send_cmd(mvm, &cmd);
 114 }
 115
 116 /*
 117  * We assume that the caller set the status to the sucess value
 118  */
 119 int iwl_mvm_send_cmd_status(struct iwl_mvm *mvm, struct iwl_host_cmd *cmd,
 120                             u32 *status)
 121 {
 122         struct iwl_rx_packet *pkt;
 123         struct iwl_cmd_response *resp;
 124         int ret, resp_len;
 125
 126         lockdep_assert_held(&mvm->mutex);
 127
 128         /*
 129          * Only synchronous commands can wait for status,
 130          * we use WANT_SKB so the caller can't.
 131          */
 132         if (WARN_ONCE(cmd->flags & (CMD_ASYNC | CMD_WANT_SKB),
 133                       "cmd flags %x", cmd->flags))
 134                 return -EINVAL;
 135
 136         cmd->flags |= CMD_SYNC | CMD_WANT_SKB;
 137
 138         ret = iwl_trans_send_cmd(mvm->trans, cmd);
 139         if (ret == -ERFKILL) {
 140                 /*
 141                  * The command failed because of RFKILL, don't update
 142                  * the status, leave it as success and return 0.
 143                  */
 144                 return 0;
 145         } else if (ret) {
 146                 return ret;
 147         }
 148
 149         pkt = cmd->resp_pkt;
 150         /* Can happen if RFKILL is asserted */
 151         if (!pkt) {
 152                 ret = 0;
 153                 goto out_free_resp;
 154         }
 155
 156         if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
 157                 ret = -EIO;
 158                 goto out_free_resp;
 159         }
 160
 161         resp_len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
 162         if (WARN_ON_ONCE(resp_len != sizeof(pkt->hdr) + sizeof(*resp))) {
 163                 ret = -EIO;
 164                 goto out_free_resp;
 165         }
 166
 167         resp = (void *)pkt->data;
 168         *status = le32_to_cpu(resp->status);
 169  out_free_resp:
 170         iwl_free_resp(cmd);
 171         return ret;
 172 }
 173
 174 /*
 175  * We assume that the caller set the status to the sucess value
 176  */
 177 int iwl_mvm_send_cmd_pdu_status(struct iwl_mvm *mvm, u8 id, u16 len,
 178                                 const void *data, u32 *status)
 179 {
 180         struct iwl_host_cmd cmd = {
 181                 .id = id,
 182                 .len = { len, },
 183                 .data = { data, },
 184         };
 185
 186         return iwl_mvm_send_cmd_status(mvm, &cmd, status);
 187 }
 188
 189 #define IWL_DECLARE_RATE_INFO(r) \
 190         [IWL_RATE_##r##M_INDEX] = IWL_RATE_##r##M_PLCP
 191
 192 /*
 193  * Translate from fw_rate_index (IWL_RATE_XXM_INDEX) to PLCP
 194  */
 195 static const u8 fw_rate_idx_to_plcp[IWL_RATE_COUNT] = {
 196         IWL_DECLARE_RATE_INFO(1),
 197         IWL_DECLARE_RATE_INFO(2),
 198         IWL_DECLARE_RATE_INFO(5),
 199         IWL_DECLARE_RATE_INFO(11),
 200         IWL_DECLARE_RATE_INFO(6),
 201         IWL_DECLARE_RATE_INFO(9),
 202         IWL_DECLARE_RATE_INFO(12),
 203         IWL_DECLARE_RATE_INFO(18),
 204         IWL_DECLARE_RATE_INFO(24),
 205         IWL_DECLARE_RATE_INFO(36),
 206         IWL_DECLARE_RATE_INFO(48),
 207         IWL_DECLARE_RATE_INFO(54),
 208 };
 209
 210 int iwl_mvm_legacy_rate_to_mac80211_idx(u32 rate_n_flags,
 211                                         enum ieee80211_band band)
 212 {
 213         int rate = rate_n_flags & RATE_LEGACY_RATE_MSK;
 214         int idx;
 215         int band_offset = 0;
 216
 217         /* Legacy rate format, search for match in table */
 218         if (band == IEEE80211_BAND_5GHZ)
 219                 band_offset = IWL_FIRST_OFDM_RATE;
 220         for (idx = band_offset; idx < IWL_RATE_COUNT_LEGACY; idx++)
 221                 if (fw_rate_idx_to_plcp[idx] == rate)
 222                         return idx - band_offset;
 223
 224         return -1;
 225 }
 226
 227 u8 iwl_mvm_mac80211_idx_to_hwrate(int rate_idx)
 228 {
 229         /* Get PLCP rate for tx_cmd->rate_n_flags */
 230         return fw_rate_idx_to_plcp[rate_idx];
 231 }
 232
 233 int iwl_mvm_rx_fw_error(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
 234                           struct iwl_device_cmd *cmd)
 235 {
 236         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 237         struct iwl_error_resp *err_resp = (void *)pkt->data;
 238
 239         IWL_ERR(mvm, "FW Error notification: type 0x%08X cmd_id 0x%02X\n",
 240                 le32_to_cpu(err_resp->error_type), err_resp->cmd_id);
 241         IWL_ERR(mvm, "FW Error notification: seq 0x%04X service 0x%08X\n",
 242                 le16_to_cpu(err_resp->bad_cmd_seq_num),
 243                 le32_to_cpu(err_resp->error_service));
 244         IWL_ERR(mvm, "FW Error notification: timestamp 0x%16llX\n",
 245                 le64_to_cpu(err_resp->timestamp));
 246         return 0;
 247 }
 248
 249 /*
 250  * Returns the first antenna as ANT_[ABC], as defined in iwl-config.h.
 251  * The parameter should also be a combination of ANT_[ABC].
 252  */
 253 u8 first_antenna(u8 mask)
 254 {
 255         BUILD_BUG_ON(ANT_A != BIT(0)); /* using ffs is wrong if not */
 256         if (WARN_ON_ONCE(!mask)) /* ffs will return 0 if mask is zeroed */
 257                 return BIT(0);
 258         return BIT(ffs(mask) - 1);
 259 }
 260
 261 /*
 262  * Toggles between TX antennas to send the probe request on.
 263  * Receives the bitmask of valid TX antennas and the *index* used
 264  * for the last TX, and returns the next valid *index* to use.
 265  * In order to set it in the tx_cmd, must do BIT(idx).
 266  */
 267 u8 iwl_mvm_next_antenna(struct iwl_mvm *mvm, u8 valid, u8 last_idx)
 268 {
 269         u8 ind = last_idx;
 270         int i;
 271
 272         for (i = 0; i < RATE_MCS_ANT_NUM; i++) {
 273                 ind = (ind + 1) % RATE_MCS_ANT_NUM;
 274                 if (valid & BIT(ind))
 275                         return ind;
 276         }
 277
 278         WARN_ONCE(1, "Failed to toggle between antennas 0x%x", valid);
 279         return last_idx;
 280 }
 281
 282 static struct {
 283         char *name;
 284         u8 num;
 285 } advanced_lookup[] = {
 286         { "NMI_INTERRUPT_WDG", 0x34 },
 287         { "SYSASSERT", 0x35 },
 288         { "UCODE_VERSION_MISMATCH", 0x37 },
 289         { "BAD_COMMAND", 0x38 },
 290         { "NMI_INTERRUPT_DATA_ACTION_PT", 0x3C },
 291         { "FATAL_ERROR", 0x3D },
 292         { "NMI_TRM_HW_ERR", 0x46 },
 293         { "NMI_INTERRUPT_TRM", 0x4C },
 294         { "NMI_INTERRUPT_BREAK_POINT", 0x54 },
 295         { "NMI_INTERRUPT_WDG_RXF_FULL", 0x5C },
 296         { "NMI_INTERRUPT_WDG_NO_RBD_RXF_FULL", 0x64 },
 297         { "NMI_INTERRUPT_HOST", 0x66 },
 298         { "NMI_INTERRUPT_ACTION_PT", 0x7C },
 299         { "NMI_INTERRUPT_UNKNOWN", 0x84 },
 300         { "NMI_INTERRUPT_INST_ACTION_PT", 0x86 },
 301         { "ADVANCED_SYSASSERT", 0 },
 302 };
 303
 304 static const char *desc_lookup(u32 num)
 305 {
 306         int i;
 307
 308         for (i = 0; i < ARRAY_SIZE(advanced_lookup) - 1; i++)
 309                 if (advanced_lookup[i].num == num)
 310                         return advanced_lookup[i].name;
 311
 312         /* No entry matches 'num', so it is the last: ADVANCED_SYSASSERT */
 313         return advanced_lookup[i].name;
 314 }
 315
 316 /*
 317  * Note: This structure is read from the device with IO accesses,
 318  * and the reading already does the endian conversion. As it is
 319  * read with u32-sized accesses, any members with a different size
 320  * need to be ordered correctly though!
 321  */
 322 struct iwl_error_event_table {
 323         u32 valid;              /* (nonzero) valid, (0) log is empty */
 324         u32 error_id;           /* type of error */
 325         u32 pc;                 /* program counter */
 326         u32 blink1;             /* branch link */
 327         u32 blink2;             /* branch link */
 328         u32 ilink1;             /* interrupt link */
 329         u32 ilink2;             /* interrupt link */
 330         u32 data1;              /* error-specific data */
 331         u32 data2;              /* error-specific data */
 332         u32 data3;              /* error-specific data */
 333         u32 bcon_time;          /* beacon timer */
 334         u32 tsf_low;            /* network timestamp function timer */
 335         u32 tsf_hi;             /* network timestamp function timer */
 336         u32 gp1;                /* GP1 timer register */
 337         u32 gp2;                /* GP2 timer register */
 338         u32 gp3;                /* GP3 timer register */
 339         u32 ucode_ver;          /* uCode version */
 340         u32 hw_ver;             /* HW Silicon version */
 341         u32 brd_ver;            /* HW board version */
 342         u32 log_pc;             /* log program counter */
 343         u32 frame_ptr;          /* frame pointer */
 344         u32 stack_ptr;          /* stack pointer */
 345         u32 hcmd;               /* last host command header */
 346         u32 isr0;               /* isr status register LMPM_NIC_ISR0:
 347                                  * rxtx_flag */
 348         u32 isr1;               /* isr status register LMPM_NIC_ISR1:
 349                                  * host_flag */
 350         u32 isr2;               /* isr status register LMPM_NIC_ISR2:
 351                                  * enc_flag */
 352         u32 isr3;               /* isr status register LMPM_NIC_ISR3:
 353                                  * time_flag */
 354         u32 isr4;               /* isr status register LMPM_NIC_ISR4:
 355                                  * wico interrupt */
 356         u32 isr_pref;           /* isr status register LMPM_NIC_PREF_STAT */
 357         u32 wait_event;         /* wait event() caller address */
 358         u32 l2p_control;        /* L2pControlField */
 359         u32 l2p_duration;       /* L2pDurationField */
 360         u32 l2p_mhvalid;        /* L2pMhValidBits */
 361         u32 l2p_addr_match;     /* L2pAddrMatchStat */
 362         u32 lmpm_pmg_sel;       /* indicate which clocks are turned on
 363                                  * (LMPM_PMG_SEL) */
 364         u32 u_timestamp;        /* indicate when the date and time of the
 365                                  * compilation */
 366         u32 flow_handler;       /* FH read/write pointers, RX credit */
 367 } __packed;
 368
 369 #define ERROR_START_OFFSET  (1 * sizeof(u32))
 370 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
 371
 372 void iwl_mvm_dump_nic_error_log(struct iwl_mvm *mvm)
 373 {
 374         struct iwl_trans *trans = mvm->trans;
 375         struct iwl_error_event_table table;
 376         u32 base;
 377
 378         base = mvm->error_event_table;
 379         if (mvm->cur_ucode == IWL_UCODE_INIT) {
 380                 if (!base)
 381                         base = mvm->fw->init_errlog_ptr;
 382         } else {
 383                 if (!base)
 384                         base = mvm->fw->inst_errlog_ptr;
 385         }
 386
 387         if (base < 0x800000 || base >= 0x80C000) {
 388                 IWL_ERR(mvm,
 389                         "Not valid error log pointer 0x%08X for %s uCode\n",
 390                         base,
 391                         (mvm->cur_ucode == IWL_UCODE_INIT)
 392                                         ? "Init" : "RT");
 393                 return;
 394         }
 395
 396         iwl_trans_read_mem_bytes(trans, base, &table, sizeof(table));
 397
 398         if (ERROR_START_OFFSET <= table.valid * ERROR_ELEM_SIZE) {
 399                 IWL_ERR(trans, "Start IWL Error Log Dump:\n");
 400                 IWL_ERR(trans, "Status: 0x%08lX, count: %d\n",
 401                         mvm->status, table.valid);
 402         }
 403
 404         trace_iwlwifi_dev_ucode_error(trans->dev, table.error_id, table.tsf_low,
 405                                       table.data1, table.data2, table.data3,
 406                                       table.blink1, table.blink2, table.ilink1,
 407                                       table.ilink2, table.bcon_time, table.gp1,
 408                                       table.gp2, table.gp3, table.ucode_ver,
 409                                       table.hw_ver, table.brd_ver);
 410         IWL_ERR(mvm, "0x%08X | %-28s\n", table.error_id,
 411                 desc_lookup(table.error_id));
 412         IWL_ERR(mvm, "0x%08X | uPc\n", table.pc);
 413         IWL_ERR(mvm, "0x%08X | branchlink1\n", table.blink1);
 414         IWL_ERR(mvm, "0x%08X | branchlink2\n", table.blink2);
 415         IWL_ERR(mvm, "0x%08X | interruptlink1\n", table.ilink1);
 416         IWL_ERR(mvm, "0x%08X | interruptlink2\n", table.ilink2);
 417         IWL_ERR(mvm, "0x%08X | data1\n", table.data1);
 418         IWL_ERR(mvm, "0x%08X | data2\n", table.data2);
 419         IWL_ERR(mvm, "0x%08X | data3\n", table.data3);
 420         IWL_ERR(mvm, "0x%08X | beacon time\n", table.bcon_time);
 421         IWL_ERR(mvm, "0x%08X | tsf low\n", table.tsf_low);
 422         IWL_ERR(mvm, "0x%08X | tsf hi\n", table.tsf_hi);
 423         IWL_ERR(mvm, "0x%08X | time gp1\n", table.gp1);
 424         IWL_ERR(mvm, "0x%08X | time gp2\n", table.gp2);
 425         IWL_ERR(mvm, "0x%08X | time gp3\n", table.gp3);
 426         IWL_ERR(mvm, "0x%08X | uCode version\n", table.ucode_ver);
 427         IWL_ERR(mvm, "0x%08X | hw version\n", table.hw_ver);
 428         IWL_ERR(mvm, "0x%08X | board version\n", table.brd_ver);
 429         IWL_ERR(mvm, "0x%08X | hcmd\n", table.hcmd);
 430         IWL_ERR(mvm, "0x%08X | isr0\n", table.isr0);
 431         IWL_ERR(mvm, "0x%08X | isr1\n", table.isr1);
 432         IWL_ERR(mvm, "0x%08X | isr2\n", table.isr2);
 433         IWL_ERR(mvm, "0x%08X | isr3\n", table.isr3);
 434         IWL_ERR(mvm, "0x%08X | isr4\n", table.isr4);
 435         IWL_ERR(mvm, "0x%08X | isr_pref\n", table.isr_pref);
 436         IWL_ERR(mvm, "0x%08X | wait_event\n", table.wait_event);
 437         IWL_ERR(mvm, "0x%08X | l2p_control\n", table.l2p_control);
 438         IWL_ERR(mvm, "0x%08X | l2p_duration\n", table.l2p_duration);
 439         IWL_ERR(mvm, "0x%08X | l2p_mhvalid\n", table.l2p_mhvalid);
 440         IWL_ERR(mvm, "0x%08X | l2p_addr_match\n", table.l2p_addr_match);
 441         IWL_ERR(mvm, "0x%08X | lmpm_pmg_sel\n", table.lmpm_pmg_sel);
 442         IWL_ERR(mvm, "0x%08X | timestamp\n", table.u_timestamp);
 443         IWL_ERR(mvm, "0x%08X | flow_handler\n", table.flow_handler);
 444 }
 445
 446 /**
 447  * iwl_mvm_send_lq_cmd() - Send link quality command
 448  * @init: This command is sent as part of station initialization right
 449  *        after station has been added.
 450  *
 451  * The link quality command is sent as the last step of station creation.
 452  * This is the special case in which init is set and we call a callback in
 453  * this case to clear the state indicating that station creation is in
 454  * progress.
 455  */
 456 int iwl_mvm_send_lq_cmd(struct iwl_mvm *mvm, struct iwl_lq_cmd *lq,
 457                         u8 flags, bool init)
 458 {
 459         struct iwl_host_cmd cmd = {
 460                 .id = LQ_CMD,
 461                 .len = { sizeof(struct iwl_lq_cmd), },
 462                 .flags = flags,
 463                 .data = { lq, },
 464         };
 465
 466         if (WARN_ON(lq->sta_id == IWL_MVM_STATION_COUNT))
 467                 return -EINVAL;
 468
 469         if (WARN_ON(init && (cmd.flags & CMD_ASYNC)))
 470                 return -EINVAL;
 471
 472         return iwl_mvm_send_cmd(mvm, &cmd);
 473 }