hw/pci/pcie_aer.c

   1 /*
   2  * pcie_aer.c
   3  *
   4  * Copyright (c) 2010 Isaku Yamahata <yamahata at valinux co jp>
   5  *                    VA Linux Systems Japan K.K.
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along
  18  * with this program; if not, see <http://www.gnu.org/licenses/>.
  19  */
  20
  21 #include "sysemu/sysemu.h"
  22 #include "qapi/qmp/types.h"
  23 #include "monitor/monitor.h"
  24 #include "hw/pci/pci_bridge.h"
  25 #include "hw/pci/pcie.h"
  26 #include "hw/pci/msix.h"
  27 #include "hw/pci/msi.h"
  28 #include "hw/pci/pci_bus.h"
  29 #include "hw/pci/pcie_regs.h"
  30
  31 //#define DEBUG_PCIE
  32 #ifdef DEBUG_PCIE
  33 # define PCIE_DPRINTF(fmt, ...)                                         \
  34     fprintf(stderr, "%s:%d " fmt, __func__, __LINE__, ## __VA_ARGS__)
  35 #else
  36 # define PCIE_DPRINTF(fmt, ...) do {} while (0)
  37 #endif
  38 #define PCIE_DEV_PRINTF(dev, fmt, ...)                                  \
  39     PCIE_DPRINTF("%s:%x "fmt, (dev)->name, (dev)->devfn, ## __VA_ARGS__)
  40
  41 #define PCI_ERR_SRC_COR_OFFS    0
  42 #define PCI_ERR_SRC_UNCOR_OFFS  2
  43
  44 /* From 6.2.7 Error Listing and Rules. Table 6-2, 6-3 and 6-4 */
  45 static uint32_t pcie_aer_uncor_default_severity(uint32_t status)
  46 {
  47     switch (status) {
  48     case PCI_ERR_UNC_INTN:
  49     case PCI_ERR_UNC_DLP:
  50     case PCI_ERR_UNC_SDN:
  51     case PCI_ERR_UNC_RX_OVER:
  52     case PCI_ERR_UNC_FCP:
  53     case PCI_ERR_UNC_MALF_TLP:
  54         return PCI_ERR_ROOT_CMD_FATAL_EN;
  55     case PCI_ERR_UNC_POISON_TLP:
  56     case PCI_ERR_UNC_ECRC:
  57     case PCI_ERR_UNC_UNSUP:
  58     case PCI_ERR_UNC_COMP_TIME:
  59     case PCI_ERR_UNC_COMP_ABORT:
  60     case PCI_ERR_UNC_UNX_COMP:
  61     case PCI_ERR_UNC_ACSV:
  62     case PCI_ERR_UNC_MCBTLP:
  63     case PCI_ERR_UNC_ATOP_EBLOCKED:
  64     case PCI_ERR_UNC_TLP_PRF_BLOCKED:
  65         return PCI_ERR_ROOT_CMD_NONFATAL_EN;
  66     default:
  67         abort();
  68         break;
  69     }
  70     return PCI_ERR_ROOT_CMD_FATAL_EN;
  71 }
  72
  73 static int aer_log_add_err(PCIEAERLog *aer_log, const PCIEAERErr *err)
  74 {
  75     if (aer_log->log_num == aer_log->log_max) {
  76         return -1;
  77     }
  78     memcpy(&aer_log->log[aer_log->log_num], err, sizeof *err);
  79     aer_log->log_num++;
  80     return 0;
  81 }
  82
  83 static void aer_log_del_err(PCIEAERLog *aer_log, PCIEAERErr *err)
  84 {
  85     assert(aer_log->log_num);
  86     *err = aer_log->log[0];
  87     aer_log->log_num--;
  88     memmove(&aer_log->log[0], &aer_log->log[1],
  89             aer_log->log_num * sizeof *err);
  90 }
  91
  92 static void aer_log_clear_all_err(PCIEAERLog *aer_log)
  93 {
  94     aer_log->log_num = 0;
  95 }
  96
  97 int pcie_aer_init(PCIDevice *dev, uint16_t offset)
  98 {
  99     PCIExpressDevice *exp;
 100
 101     pcie_add_capability(dev, PCI_EXT_CAP_ID_ERR, PCI_ERR_VER,
 102                         offset, PCI_ERR_SIZEOF);
 103     exp = &dev->exp;
 104     exp->aer_cap = offset;
 105
 106     /* log_max is property */
 107     if (dev->exp.aer_log.log_max == PCIE_AER_LOG_MAX_UNSET) {
 108         dev->exp.aer_log.log_max = PCIE_AER_LOG_MAX_DEFAULT;
 109     }
 110     /* clip down the value to avoid unreasobale memory usage */
 111     if (dev->exp.aer_log.log_max > PCIE_AER_LOG_MAX_LIMIT) {
 112         return -EINVAL;
 113     }
 114     dev->exp.aer_log.log = g_malloc0(sizeof dev->exp.aer_log.log[0] *
 115                                         dev->exp.aer_log.log_max);
 116
 117     pci_set_long(dev->w1cmask + offset + PCI_ERR_UNCOR_STATUS,
 118                  PCI_ERR_UNC_SUPPORTED);
 119
 120     pci_set_long(dev->config + offset + PCI_ERR_UNCOR_SEVER,
 121                  PCI_ERR_UNC_SEVERITY_DEFAULT);
 122     pci_set_long(dev->wmask + offset + PCI_ERR_UNCOR_SEVER,
 123                  PCI_ERR_UNC_SUPPORTED);
 124
 125     pci_long_test_and_set_mask(dev->w1cmask + offset + PCI_ERR_COR_STATUS,
 126                                PCI_ERR_COR_SUPPORTED);
 127
 128     pci_set_long(dev->config + offset + PCI_ERR_COR_MASK,
 129                  PCI_ERR_COR_MASK_DEFAULT);
 130     pci_set_long(dev->wmask + offset + PCI_ERR_COR_MASK,
 131                  PCI_ERR_COR_SUPPORTED);
 132
 133     /* capabilities and control. multiple header logging is supported */
 134     if (dev->exp.aer_log.log_max > 0) {
 135         pci_set_long(dev->config + offset + PCI_ERR_CAP,
 136                      PCI_ERR_CAP_ECRC_GENC | PCI_ERR_CAP_ECRC_CHKC |
 137                      PCI_ERR_CAP_MHRC);
 138         pci_set_long(dev->wmask + offset + PCI_ERR_CAP,
 139                      PCI_ERR_CAP_ECRC_GENE | PCI_ERR_CAP_ECRC_CHKE |
 140                      PCI_ERR_CAP_MHRE);
 141     } else {
 142         pci_set_long(dev->config + offset + PCI_ERR_CAP,
 143                      PCI_ERR_CAP_ECRC_GENC | PCI_ERR_CAP_ECRC_CHKC);
 144         pci_set_long(dev->wmask + offset + PCI_ERR_CAP,
 145                      PCI_ERR_CAP_ECRC_GENE | PCI_ERR_CAP_ECRC_CHKE);
 146     }
 147
 148     switch (pcie_cap_get_type(dev)) {
 149     case PCI_EXP_TYPE_ROOT_PORT:
 150         /* this case will be set by pcie_aer_root_init() */
 151         /* fallthrough */
 152     case PCI_EXP_TYPE_DOWNSTREAM:
 153     case PCI_EXP_TYPE_UPSTREAM:
 154         pci_word_test_and_set_mask(dev->wmask + PCI_BRIDGE_CONTROL,
 155                                    PCI_BRIDGE_CTL_SERR);
 156         pci_long_test_and_set_mask(dev->w1cmask + PCI_STATUS,
 157                                    PCI_SEC_STATUS_RCV_SYSTEM_ERROR);
 158         break;
 159     default:
 160         /* nothing */
 161         break;
 162     }
 163     return 0;
 164 }
 165
 166 void pcie_aer_exit(PCIDevice *dev)
 167 {
 168     g_free(dev->exp.aer_log.log);
 169 }
 170
 171 static void pcie_aer_update_uncor_status(PCIDevice *dev)
 172 {
 173     uint8_t *aer_cap = dev->config + dev->exp.aer_cap;
 174     PCIEAERLog *aer_log = &dev->exp.aer_log;
 175
 176     uint16_t i;
 177     for (i = 0; i < aer_log->log_num; i++) {
 178         pci_long_test_and_set_mask(aer_cap + PCI_ERR_UNCOR_STATUS,
 179                                    dev->exp.aer_log.log[i].status);
 180     }
 181 }
 182
 183 /*
 184  * return value:
 185  * true: error message needs to be sent up
 186  * false: error message is masked
 187  *
 188  * 6.2.6 Error Message Control
 189  * Figure 6-3
 190  * all pci express devices part
 191  */
 192 static bool
 193 pcie_aer_msg_alldev(PCIDevice *dev, const PCIEAERMsg *msg)
 194 {
 195     if (!(pcie_aer_msg_is_uncor(msg) &&
 196           (pci_get_word(dev->config + PCI_COMMAND) & PCI_COMMAND_SERR))) {
 197         return false;
 198     }
 199
 200     /* Signaled System Error
 201      *
 202      * 7.5.1.1 Command register
 203      * Bit 8 SERR# Enable
 204      *
 205      * When Set, this bit enables reporting of Non-fatal and Fatal
 206      * errors detected by the Function to the Root Complex. Note that
 207      * errors are reported if enabled either through this bit or through
 208      * the PCI Express specific bits in the Device Control register (see
 209      * Section 7.8.4).
 210      */
 211     pci_word_test_and_set_mask(dev->config + PCI_STATUS,
 212                                PCI_STATUS_SIG_SYSTEM_ERROR);
 213
 214     if (!(msg->severity &
 215           pci_get_word(dev->config + dev->exp.exp_cap + PCI_EXP_DEVCTL))) {
 216         return false;
 217     }
 218
 219     /* send up error message */
 220     return true;
 221 }
 222
 223 /*
 224  * return value:
 225  * true: error message is sent up
 226  * false: error message is masked
 227  *
 228  * 6.2.6 Error Message Control
 229  * Figure 6-3
 230  * virtual pci bridge part
 231  */
 232 static bool pcie_aer_msg_vbridge(PCIDevice *dev, const PCIEAERMsg *msg)
 233 {
 234     uint16_t bridge_control = pci_get_word(dev->config + PCI_BRIDGE_CONTROL);
 235
 236     if (pcie_aer_msg_is_uncor(msg)) {
 237         /* Received System Error */
 238         pci_word_test_and_set_mask(dev->config + PCI_SEC_STATUS,
 239                                    PCI_SEC_STATUS_RCV_SYSTEM_ERROR);
 240     }
 241
 242     if (!(bridge_control & PCI_BRIDGE_CTL_SERR)) {
 243         return false;
 244     }
 245     return true;
 246 }
 247
 248 void pcie_aer_root_set_vector(PCIDevice *dev, unsigned int vector)
 249 {
 250     uint8_t *aer_cap = dev->config + dev->exp.aer_cap;
 251     assert(vector < PCI_ERR_ROOT_IRQ_MAX);
 252     pci_long_test_and_clear_mask(aer_cap + PCI_ERR_ROOT_STATUS,
 253                                  PCI_ERR_ROOT_IRQ);
 254     pci_long_test_and_set_mask(aer_cap + PCI_ERR_ROOT_STATUS,
 255                                vector << PCI_ERR_ROOT_IRQ_SHIFT);
 256 }
 257
 258 static unsigned int pcie_aer_root_get_vector(PCIDevice *dev)
 259 {
 260     uint8_t *aer_cap = dev->config + dev->exp.aer_cap;
 261     uint32_t root_status = pci_get_long(aer_cap + PCI_ERR_ROOT_STATUS);
 262     return (root_status & PCI_ERR_ROOT_IRQ) >> PCI_ERR_ROOT_IRQ_SHIFT;
 263 }
 264
 265 /* Given a status register, get corresponding bits in the command register */
 266 static uint32_t pcie_aer_status_to_cmd(uint32_t status)
 267 {
 268     uint32_t cmd = 0;
 269     if (status & PCI_ERR_ROOT_COR_RCV) {
 270         cmd |= PCI_ERR_ROOT_CMD_COR_EN;
 271     }
 272     if (status & PCI_ERR_ROOT_NONFATAL_RCV) {
 273         cmd |= PCI_ERR_ROOT_CMD_NONFATAL_EN;
 274     }
 275     if (status & PCI_ERR_ROOT_FATAL_RCV) {
 276         cmd |= PCI_ERR_ROOT_CMD_FATAL_EN;
 277     }
 278     return cmd;
 279 }
 280
 281 static void pcie_aer_root_notify(PCIDevice *dev)
 282 {
 283     if (msix_enabled(dev)) {
 284         msix_notify(dev, pcie_aer_root_get_vector(dev));
 285     } else if (msi_enabled(dev)) {
 286         msi_notify(dev, pcie_aer_root_get_vector(dev));
 287     } else {
 288         pci_irq_assert(dev);
 289     }
 290 }
 291
 292 /*
 293  * 6.2.6 Error Message Control
 294  * Figure 6-3
 295  * root port part
 296  */
 297 static void pcie_aer_msg_root_port(PCIDevice *dev, const PCIEAERMsg *msg)
 298 {
 299     uint16_t cmd;
 300     uint8_t *aer_cap;
 301     uint32_t root_cmd;
 302     uint32_t root_status, prev_status;
 303
 304     cmd = pci_get_word(dev->config + PCI_COMMAND);
 305     aer_cap = dev->config + dev->exp.aer_cap;
 306     root_cmd = pci_get_long(aer_cap + PCI_ERR_ROOT_COMMAND);
 307     prev_status = root_status = pci_get_long(aer_cap + PCI_ERR_ROOT_STATUS);
 308
 309     if (cmd & PCI_COMMAND_SERR) {
 310         /* System Error.
 311          *
 312          * The way to report System Error is platform specific and
 313          * it isn't implemented in qemu right now.
 314          * So just discard the error for now.
 315          * OS which cares of aer would receive errors via
 316          * native aer mechanims, so this wouldn't matter.
 317          */
 318     }
 319
 320     /* Errro Message Received: Root Error Status register */
 321     switch (msg->severity) {
 322     case PCI_ERR_ROOT_CMD_COR_EN:
 323         if (root_status & PCI_ERR_ROOT_COR_RCV) {
 324             root_status |= PCI_ERR_ROOT_MULTI_COR_RCV;
 325         } else {
 326             pci_set_word(aer_cap + PCI_ERR_ROOT_ERR_SRC + PCI_ERR_SRC_COR_OFFS,
 327                          msg->source_id);
 328         }
 329         root_status |= PCI_ERR_ROOT_COR_RCV;
 330         break;
 331     case PCI_ERR_ROOT_CMD_NONFATAL_EN:
 332         root_status |= PCI_ERR_ROOT_NONFATAL_RCV;
 333         break;
 334     case PCI_ERR_ROOT_CMD_FATAL_EN:
 335         if (!(root_status & PCI_ERR_ROOT_UNCOR_RCV)) {
 336             root_status |= PCI_ERR_ROOT_FIRST_FATAL;
 337         }
 338         root_status |= PCI_ERR_ROOT_FATAL_RCV;
 339         break;
 340     default:
 341         abort();
 342         break;
 343     }
 344     if (pcie_aer_msg_is_uncor(msg)) {
 345         if (root_status & PCI_ERR_ROOT_UNCOR_RCV) {
 346             root_status |= PCI_ERR_ROOT_MULTI_UNCOR_RCV;
 347         } else {
 348             pci_set_word(aer_cap + PCI_ERR_ROOT_ERR_SRC +
 349                          PCI_ERR_SRC_UNCOR_OFFS, msg->source_id);
 350         }
 351         root_status |= PCI_ERR_ROOT_UNCOR_RCV;
 352     }
 353     pci_set_long(aer_cap + PCI_ERR_ROOT_STATUS, root_status);
 354
 355     /* 6.2.4.1.2 Interrupt Generation */
 356     /* All the above did was set some bits in the status register.
 357      * Specifically these that match message severity.
 358      * The below code relies on this fact. */
 359     if (!(root_cmd & msg->severity) ||
 360         (pcie_aer_status_to_cmd(prev_status) & root_cmd)) {
 361         /* Condition is not being set or was already true so nothing to do. */
 362         return;
 363     }
 364
 365     pcie_aer_root_notify(dev);
 366 }
 367
 368 /*
 369  * 6.2.6 Error Message Control Figure 6-3
 370  *
 371  * Walk up the bus tree from the device, propagate the error message.
 372  */
 373 static void pcie_aer_msg(PCIDevice *dev, const PCIEAERMsg *msg)
 374 {
 375     uint8_t type;
 376
 377     while (dev) {
 378         if (!pci_is_express(dev)) {
 379             /* just ignore it */
 380             /* TODO: Shouldn't we set PCI_STATUS_SIG_SYSTEM_ERROR?
 381              * Consider e.g. a PCI bridge above a PCI Express device. */
 382             return;
 383         }
 384
 385         type = pcie_cap_get_type(dev);
 386         if ((type == PCI_EXP_TYPE_ROOT_PORT ||
 387             type == PCI_EXP_TYPE_UPSTREAM ||
 388             type == PCI_EXP_TYPE_DOWNSTREAM) &&
 389             !pcie_aer_msg_vbridge(dev, msg)) {
 390                 return;
 391         }
 392         if (!pcie_aer_msg_alldev(dev, msg)) {
 393             return;
 394         }
 395         if (type == PCI_EXP_TYPE_ROOT_PORT) {
 396             pcie_aer_msg_root_port(dev, msg);
 397             /* Root port can notify system itself,
 398                or send the error message to root complex event collector. */
 399             /*
 400              * if root port is associated with an event collector,
 401              * return the root complex event collector here.
 402              * For now root complex event collector isn't supported.
 403              */
 404             return;
 405         }
 406         dev = pci_bridge_get_device(dev->bus);
 407     }
 408 }
 409
 410 static void pcie_aer_update_log(PCIDevice *dev, const PCIEAERErr *err)
 411 {
 412     uint8_t *aer_cap = dev->config + dev->exp.aer_cap;
 413     uint8_t first_bit = ctz32(err->status);
 414     uint32_t errcap = pci_get_long(aer_cap + PCI_ERR_CAP);
 415     int i;
 416
 417     assert(err->status);
 418     assert(!(err->status & (err->status - 1)));
 419
 420     errcap &= ~(PCI_ERR_CAP_FEP_MASK | PCI_ERR_CAP_TLP);
 421     errcap |= PCI_ERR_CAP_FEP(first_bit);
 422
 423     if (err->flags & PCIE_AER_ERR_HEADER_VALID) {
 424         for (i = 0; i < ARRAY_SIZE(err->header); ++i) {
 425             /* 7.10.8 Header Log Register */
 426             uint8_t *header_log =
 427                 aer_cap + PCI_ERR_HEADER_LOG + i * sizeof err->header[0];
 428             stl_be_p(header_log, err->header[i]);
 429         }
 430     } else {
 431         assert(!(err->flags & PCIE_AER_ERR_TLP_PREFIX_PRESENT));
 432         memset(aer_cap + PCI_ERR_HEADER_LOG, 0, PCI_ERR_HEADER_LOG_SIZE);
 433     }
 434
 435     if ((err->flags & PCIE_AER_ERR_TLP_PREFIX_PRESENT) &&
 436         (pci_get_long(dev->config + dev->exp.exp_cap + PCI_EXP_DEVCAP2) &
 437          PCI_EXP_DEVCAP2_EETLPP)) {
 438         for (i = 0; i < ARRAY_SIZE(err->prefix); ++i) {
 439             /* 7.10.12 tlp prefix log register */
 440             uint8_t *prefix_log =
 441                 aer_cap + PCI_ERR_TLP_PREFIX_LOG + i * sizeof err->prefix[0];
 442             stl_be_p(prefix_log, err->prefix[i]);
 443         }
 444         errcap |= PCI_ERR_CAP_TLP;
 445     } else {
 446         memset(aer_cap + PCI_ERR_TLP_PREFIX_LOG, 0,
 447                PCI_ERR_TLP_PREFIX_LOG_SIZE);
 448     }
 449     pci_set_long(aer_cap + PCI_ERR_CAP, errcap);
 450 }
 451
 452 static void pcie_aer_clear_log(PCIDevice *dev)
 453 {
 454     uint8_t *aer_cap = dev->config + dev->exp.aer_cap;
 455
 456     pci_long_test_and_clear_mask(aer_cap + PCI_ERR_CAP,
 457                                  PCI_ERR_CAP_FEP_MASK | PCI_ERR_CAP_TLP);
 458
 459     memset(aer_cap + PCI_ERR_HEADER_LOG, 0, PCI_ERR_HEADER_LOG_SIZE);
 460     memset(aer_cap + PCI_ERR_TLP_PREFIX_LOG, 0, PCI_ERR_TLP_PREFIX_LOG_SIZE);
 461 }
 462
 463 static void pcie_aer_clear_error(PCIDevice *dev)
 464 {
 465     uint8_t *aer_cap = dev->config + dev->exp.aer_cap;
 466     uint32_t errcap = pci_get_long(aer_cap + PCI_ERR_CAP);
 467     PCIEAERLog *aer_log = &dev->exp.aer_log;
 468     PCIEAERErr err;
 469
 470     if (!(errcap & PCI_ERR_CAP_MHRE) || !aer_log->log_num) {
 471         pcie_aer_clear_log(dev);
 472         return;
 473     }
 474
 475     /*
 476      * If more errors are queued, set corresponding bits in uncorrectable
 477      * error status.
 478      * We emulate uncorrectable error status register as W1CS.
 479      * So set bit in uncorrectable error status here again for multiple
 480      * error recording support.
 481      *
 482      * 6.2.4.2 Multiple Error Handling(Advanced Error Reporting Capability)
 483      */
 484     pcie_aer_update_uncor_status(dev);
 485
 486     aer_log_del_err(aer_log, &err);
 487     pcie_aer_update_log(dev, &err);
 488 }
 489
 490 static int pcie_aer_record_error(PCIDevice *dev,
 491                                  const PCIEAERErr *err)
 492 {
 493     uint8_t *aer_cap = dev->config + dev->exp.aer_cap;
 494     uint32_t errcap = pci_get_long(aer_cap + PCI_ERR_CAP);
 495     int fep = PCI_ERR_CAP_FEP(errcap);
 496
 497     assert(err->status);
 498     assert(!(err->status & (err->status - 1)));
 499
 500     if (errcap & PCI_ERR_CAP_MHRE &&
 501         (pci_get_long(aer_cap + PCI_ERR_UNCOR_STATUS) & (1U << fep))) {
 502         /*  Not first error. queue error */
 503         if (aer_log_add_err(&dev->exp.aer_log, err) < 0) {
 504             /* overflow */
 505             return -1;
 506         }
 507         return 0;
 508     }
 509
 510     pcie_aer_update_log(dev, err);
 511     return 0;
 512 }
 513
 514 typedef struct PCIEAERInject {
 515     PCIDevice *dev;
 516     uint8_t *aer_cap;
 517     const PCIEAERErr *err;
 518     uint16_t devctl;
 519     uint16_t devsta;
 520     uint32_t error_status;
 521     bool unsupported_request;
 522     bool log_overflow;
 523     PCIEAERMsg msg;
 524 } PCIEAERInject;
 525
 526 static bool pcie_aer_inject_cor_error(PCIEAERInject *inj,
 527                                       uint32_t uncor_status,
 528                                       bool is_advisory_nonfatal)
 529 {
 530     PCIDevice *dev = inj->dev;
 531
 532     inj->devsta |= PCI_EXP_DEVSTA_CED;
 533     if (inj->unsupported_request) {
 534         inj->devsta |= PCI_EXP_DEVSTA_URD;
 535     }
 536     pci_set_word(dev->config + dev->exp.exp_cap + PCI_EXP_DEVSTA, inj->devsta);
 537
 538     if (inj->aer_cap) {
 539         uint32_t mask;
 540         pci_long_test_and_set_mask(inj->aer_cap + PCI_ERR_COR_STATUS,
 541                                    inj->error_status);
 542         mask = pci_get_long(inj->aer_cap + PCI_ERR_COR_MASK);
 543         if (mask & inj->error_status) {
 544             return false;
 545         }
 546         if (is_advisory_nonfatal) {
 547             uint32_t uncor_mask =
 548                 pci_get_long(inj->aer_cap + PCI_ERR_UNCOR_MASK);
 549             if (!(uncor_mask & uncor_status)) {
 550                 inj->log_overflow = !!pcie_aer_record_error(dev, inj->err);
 551             }
 552             pci_long_test_and_set_mask(inj->aer_cap + PCI_ERR_UNCOR_STATUS,
 553                                        uncor_status);
 554         }
 555     }
 556
 557     if (inj->unsupported_request && !(inj->devctl & PCI_EXP_DEVCTL_URRE)) {
 558         return false;
 559     }
 560     if (!(inj->devctl & PCI_EXP_DEVCTL_CERE)) {
 561         return false;
 562     }
 563
 564     inj->msg.severity = PCI_ERR_ROOT_CMD_COR_EN;
 565     return true;
 566 }
 567
 568 static bool pcie_aer_inject_uncor_error(PCIEAERInject *inj, bool is_fatal)
 569 {
 570     PCIDevice *dev = inj->dev;
 571     uint16_t cmd;
 572
 573     if (is_fatal) {
 574         inj->devsta |= PCI_EXP_DEVSTA_FED;
 575     } else {
 576         inj->devsta |= PCI_EXP_DEVSTA_NFED;
 577     }
 578     if (inj->unsupported_request) {
 579         inj->devsta |= PCI_EXP_DEVSTA_URD;
 580     }
 581     pci_set_long(dev->config + dev->exp.exp_cap + PCI_EXP_DEVSTA, inj->devsta);
 582
 583     if (inj->aer_cap) {
 584         uint32_t mask = pci_get_long(inj->aer_cap + PCI_ERR_UNCOR_MASK);
 585         if (mask & inj->error_status) {
 586             pci_long_test_and_set_mask(inj->aer_cap + PCI_ERR_UNCOR_STATUS,
 587                                        inj->error_status);
 588             return false;
 589         }
 590
 591         inj->log_overflow = !!pcie_aer_record_error(dev, inj->err);
 592         pci_long_test_and_set_mask(inj->aer_cap + PCI_ERR_UNCOR_STATUS,
 593                                    inj->error_status);
 594     }
 595
 596     cmd = pci_get_word(dev->config + PCI_COMMAND);
 597     if (inj->unsupported_request &&
 598         !(inj->devctl & PCI_EXP_DEVCTL_URRE) && !(cmd & PCI_COMMAND_SERR)) {
 599         return false;
 600     }
 601     if (is_fatal) {
 602         if (!((cmd & PCI_COMMAND_SERR) ||
 603               (inj->devctl & PCI_EXP_DEVCTL_FERE))) {
 604             return false;
 605         }
 606         inj->msg.severity = PCI_ERR_ROOT_CMD_FATAL_EN;
 607     } else {
 608         if (!((cmd & PCI_COMMAND_SERR) ||
 609               (inj->devctl & PCI_EXP_DEVCTL_NFERE))) {
 610             return false;
 611         }
 612         inj->msg.severity = PCI_ERR_ROOT_CMD_NONFATAL_EN;
 613     }
 614     return true;
 615 }
 616
 617 /*
 618  * non-Function specific error must be recorded in all functions.
 619  * It is the responsibility of the caller of this function.
 620  * It is also caller's responsibility to determine which function should
 621  * report the error.
 622  *
 623  * 6.2.4 Error Logging
 624  * 6.2.5 Sequence of Device Error Signaling and Logging Operations
 625  * Figure 6-2: Flowchart Showing Sequence of Device Error Signaling and Logging
 626  *             Operations
 627  */
 628 int pcie_aer_inject_error(PCIDevice *dev, const PCIEAERErr *err)
 629 {
 630     uint8_t *aer_cap = NULL;
 631     uint16_t devctl = 0;
 632     uint16_t devsta = 0;
 633     uint32_t error_status = err->status;
 634     PCIEAERInject inj;
 635
 636     if (!pci_is_express(dev)) {
 637         return -ENOSYS;
 638     }
 639
 640     if (err->flags & PCIE_AER_ERR_IS_CORRECTABLE) {
 641         error_status &= PCI_ERR_COR_SUPPORTED;
 642     } else {
 643         error_status &= PCI_ERR_UNC_SUPPORTED;
 644     }
 645
 646     /* invalid status bit. one and only one bit must be set */
 647     if (!error_status || (error_status & (error_status - 1))) {
 648         return -EINVAL;
 649     }
 650
 651     if (dev->exp.aer_cap) {
 652         uint8_t *exp_cap = dev->config + dev->exp.exp_cap;
 653         aer_cap = dev->config + dev->exp.aer_cap;
 654         devctl = pci_get_long(exp_cap + PCI_EXP_DEVCTL);
 655         devsta = pci_get_long(exp_cap + PCI_EXP_DEVSTA);
 656     }
 657
 658     inj.dev = dev;
 659     inj.aer_cap = aer_cap;
 660     inj.err = err;
 661     inj.devctl = devctl;
 662     inj.devsta = devsta;
 663     inj.error_status = error_status;
 664     inj.unsupported_request = !(err->flags & PCIE_AER_ERR_IS_CORRECTABLE) &&
 665         err->status == PCI_ERR_UNC_UNSUP;
 666     inj.log_overflow = false;
 667
 668     if (err->flags & PCIE_AER_ERR_IS_CORRECTABLE) {
 669         if (!pcie_aer_inject_cor_error(&inj, 0, false)) {
 670             return 0;
 671         }
 672     } else {
 673         bool is_fatal =
 674             pcie_aer_uncor_default_severity(error_status) ==
 675             PCI_ERR_ROOT_CMD_FATAL_EN;
 676         if (aer_cap) {
 677             is_fatal =
 678                 error_status & pci_get_long(aer_cap + PCI_ERR_UNCOR_SEVER);
 679         }
 680         if (!is_fatal && (err->flags & PCIE_AER_ERR_MAYBE_ADVISORY)) {
 681             inj.error_status = PCI_ERR_COR_ADV_NONFATAL;
 682             if (!pcie_aer_inject_cor_error(&inj, error_status, true)) {
 683                 return 0;
 684             }
 685         } else {
 686             if (!pcie_aer_inject_uncor_error(&inj, is_fatal)) {
 687                 return 0;
 688             }
 689         }
 690     }
 691
 692     /* send up error message */
 693     inj.msg.source_id = err->source_id;
 694     pcie_aer_msg(dev, &inj.msg);
 695
 696     if (inj.log_overflow) {
 697         PCIEAERErr header_log_overflow = {
 698             .status = PCI_ERR_COR_HL_OVERFLOW,
 699             .flags = PCIE_AER_ERR_IS_CORRECTABLE,
 700         };
 701         int ret = pcie_aer_inject_error(dev, &header_log_overflow);
 702         assert(!ret);
 703     }
 704     return 0;
 705 }
 706
 707 void pcie_aer_write_config(PCIDevice *dev,
 708                            uint32_t addr, uint32_t val, int len)
 709 {
 710     uint8_t *aer_cap = dev->config + dev->exp.aer_cap;
 711     uint32_t errcap = pci_get_long(aer_cap + PCI_ERR_CAP);
 712     uint32_t first_error = 1U << PCI_ERR_CAP_FEP(errcap);
 713     uint32_t uncorsta = pci_get_long(aer_cap + PCI_ERR_UNCOR_STATUS);
 714
 715     /* uncorrectable error */
 716     if (!(uncorsta & first_error)) {
 717         /* the bit that corresponds to the first error is cleared */
 718         pcie_aer_clear_error(dev);
 719     } else if (errcap & PCI_ERR_CAP_MHRE) {
 720         /* When PCI_ERR_CAP_MHRE is enabled and the first error isn't cleared
 721          * nothing should happen. So we have to revert the modification to
 722          * the register.
 723          */
 724         pcie_aer_update_uncor_status(dev);
 725     } else {
 726         /* capability & control
 727          * PCI_ERR_CAP_MHRE might be cleared, so clear of header log.
 728          */
 729         aer_log_clear_all_err(&dev->exp.aer_log);
 730     }
 731 }
 732
 733 void pcie_aer_root_init(PCIDevice *dev)
 734 {
 735     uint16_t pos = dev->exp.aer_cap;
 736
 737     pci_set_long(dev->wmask + pos + PCI_ERR_ROOT_COMMAND,
 738                  PCI_ERR_ROOT_CMD_EN_MASK);
 739     pci_set_long(dev->w1cmask + pos + PCI_ERR_ROOT_STATUS,
 740                  PCI_ERR_ROOT_STATUS_REPORT_MASK);
 741     /* PCI_ERR_ROOT_IRQ is RO but devices change it using a
 742      * device-specific method.
 743      */
 744     pci_set_long(dev->cmask + pos + PCI_ERR_ROOT_STATUS,
 745                  ~PCI_ERR_ROOT_IRQ);
 746 }
 747
 748 void pcie_aer_root_reset(PCIDevice *dev)
 749 {
 750     uint8_t* aer_cap = dev->config + dev->exp.aer_cap;
 751
 752     pci_set_long(aer_cap + PCI_ERR_ROOT_COMMAND, 0);
 753
 754     /*
 755      * Advanced Error Interrupt Message Number in Root Error Status Register
 756      * must be updated by chip dependent code because it's chip dependent
 757      * which number is used.
 758      */
 759 }
 760
 761 void pcie_aer_root_write_config(PCIDevice *dev,
 762                                 uint32_t addr, uint32_t val, int len,
 763                                 uint32_t root_cmd_prev)
 764 {
 765     uint8_t *aer_cap = dev->config + dev->exp.aer_cap;
 766     uint32_t root_status = pci_get_long(aer_cap + PCI_ERR_ROOT_STATUS);
 767     uint32_t enabled_cmd = pcie_aer_status_to_cmd(root_status);
 768     uint32_t root_cmd = pci_get_long(aer_cap + PCI_ERR_ROOT_COMMAND);
 769     /* 6.2.4.1.2 Interrupt Generation */
 770     if (!msix_enabled(dev) && !msi_enabled(dev)) {
 771         pci_set_irq(dev, !!(root_cmd & enabled_cmd));
 772         return;
 773     }
 774
 775     if ((root_cmd_prev & enabled_cmd) || !(root_cmd & enabled_cmd)) {
 776         /* Send MSI on transition from false to true. */
 777         return;
 778     }
 779
 780     pcie_aer_root_notify(dev);
 781 }
 782
 783 static const VMStateDescription vmstate_pcie_aer_err = {
 784     .name = "PCIE_AER_ERROR",
 785     .version_id = 1,
 786     .minimum_version_id = 1,
 787     .fields = (VMStateField[]) {
 788         VMSTATE_UINT32(status, PCIEAERErr),
 789         VMSTATE_UINT16(source_id, PCIEAERErr),
 790         VMSTATE_UINT16(flags, PCIEAERErr),
 791         VMSTATE_UINT32_ARRAY(header, PCIEAERErr, 4),
 792         VMSTATE_UINT32_ARRAY(prefix, PCIEAERErr, 4),
 793         VMSTATE_END_OF_LIST()
 794     }
 795 };
 796
 797 static bool pcie_aer_state_log_num_valid(void *opaque, int version_id)
 798 {
 799     PCIEAERLog *s = opaque;
 800
 801     return s->log_num <= s->log_max;
 802 }
 803
 804 const VMStateDescription vmstate_pcie_aer_log = {
 805     .name = "PCIE_AER_ERROR_LOG",
 806     .version_id = 1,
 807     .minimum_version_id = 1,
 808     .fields = (VMStateField[]) {
 809         VMSTATE_UINT16(log_num, PCIEAERLog),
 810         VMSTATE_UINT16_EQUAL(log_max, PCIEAERLog),
 811         VMSTATE_VALIDATE("log_num <= log_max", pcie_aer_state_log_num_valid),
 812         VMSTATE_STRUCT_VARRAY_POINTER_UINT16(log, PCIEAERLog, log_num,
 813                               vmstate_pcie_aer_err, PCIEAERErr),
 814         VMSTATE_END_OF_LIST()
 815     }
 816 };
 817
 818 typedef struct PCIEAERErrorName {
 819     const char *name;
 820     uint32_t val;
 821     bool correctable;
 822 } PCIEAERErrorName;
 823
 824 /*
 825  * AER error name -> value conversion table
 826  * This naming scheme is same to linux aer-injection tool.
 827  */
 828 static const struct PCIEAERErrorName pcie_aer_error_list[] = {
 829     {
 830         .name = "DLP",
 831         .val = PCI_ERR_UNC_DLP,
 832         .correctable = false,
 833     }, {
 834         .name = "SDN",
 835         .val = PCI_ERR_UNC_SDN,
 836         .correctable = false,
 837     }, {
 838         .name = "POISON_TLP",
 839         .val = PCI_ERR_UNC_POISON_TLP,
 840         .correctable = false,
 841     }, {
 842         .name = "FCP",
 843         .val = PCI_ERR_UNC_FCP,
 844         .correctable = false,
 845     }, {
 846         .name = "COMP_TIME",
 847         .val = PCI_ERR_UNC_COMP_TIME,
 848         .correctable = false,
 849     }, {
 850         .name = "COMP_ABORT",
 851         .val = PCI_ERR_UNC_COMP_ABORT,
 852         .correctable = false,
 853     }, {
 854         .name = "UNX_COMP",
 855         .val = PCI_ERR_UNC_UNX_COMP,
 856         .correctable = false,
 857     }, {
 858         .name = "RX_OVER",
 859         .val = PCI_ERR_UNC_RX_OVER,
 860         .correctable = false,
 861     }, {
 862         .name = "MALF_TLP",
 863         .val = PCI_ERR_UNC_MALF_TLP,
 864         .correctable = false,
 865     }, {
 866         .name = "ECRC",
 867         .val = PCI_ERR_UNC_ECRC,
 868         .correctable = false,
 869     }, {
 870         .name = "UNSUP",
 871         .val = PCI_ERR_UNC_UNSUP,
 872         .correctable = false,
 873     }, {
 874         .name = "ACSV",
 875         .val = PCI_ERR_UNC_ACSV,
 876         .correctable = false,
 877     }, {
 878         .name = "INTN",
 879         .val = PCI_ERR_UNC_INTN,
 880         .correctable = false,
 881     }, {
 882         .name = "MCBTLP",
 883         .val = PCI_ERR_UNC_MCBTLP,
 884         .correctable = false,
 885     }, {
 886         .name = "ATOP_EBLOCKED",
 887         .val = PCI_ERR_UNC_ATOP_EBLOCKED,
 888         .correctable = false,
 889     }, {
 890         .name = "TLP_PRF_BLOCKED",
 891         .val = PCI_ERR_UNC_TLP_PRF_BLOCKED,
 892         .correctable = false,
 893     }, {
 894         .name = "RCVR",
 895         .val = PCI_ERR_COR_RCVR,
 896         .correctable = true,
 897     }, {
 898         .name = "BAD_TLP",
 899         .val = PCI_ERR_COR_BAD_TLP,
 900         .correctable = true,
 901     }, {
 902         .name = "BAD_DLLP",
 903         .val = PCI_ERR_COR_BAD_DLLP,
 904         .correctable = true,
 905     }, {
 906         .name = "REP_ROLL",
 907         .val = PCI_ERR_COR_REP_ROLL,
 908         .correctable = true,
 909     }, {
 910         .name = "REP_TIMER",
 911         .val = PCI_ERR_COR_REP_TIMER,
 912         .correctable = true,
 913     }, {
 914         .name = "ADV_NONFATAL",
 915         .val = PCI_ERR_COR_ADV_NONFATAL,
 916         .correctable = true,
 917     }, {
 918         .name = "INTERNAL",
 919         .val = PCI_ERR_COR_INTERNAL,
 920         .correctable = true,
 921     }, {
 922         .name = "HL_OVERFLOW",
 923         .val = PCI_ERR_COR_HL_OVERFLOW,
 924         .correctable = true,
 925     },
 926 };
 927
 928 static int pcie_aer_parse_error_string(const char *error_name,
 929                                        uint32_t *status, bool *correctable)
 930 {
 931     int i;
 932
 933     for (i = 0; i < ARRAY_SIZE(pcie_aer_error_list); i++) {
 934         const  PCIEAERErrorName *e = &pcie_aer_error_list[i];
 935         if (strcmp(error_name, e->name)) {
 936             continue;
 937         }
 938
 939         *status = e->val;
 940         *correctable = e->correctable;
 941         return 0;
 942     }
 943     return -EINVAL;
 944 }
 945
 946 static int do_pcie_aer_inject_error(Monitor *mon,
 947                                     const QDict *qdict, QObject **ret_data)
 948 {
 949     const char *id = qdict_get_str(qdict, "id");
 950     const char *error_name;
 951     uint32_t error_status;
 952     bool correctable;
 953     PCIDevice *dev;
 954     PCIEAERErr err;
 955     int ret;
 956
 957     ret = pci_qdev_find_device(id, &dev);
 958     if (ret < 0) {
 959         monitor_printf(mon,
 960                        "id or pci device path is invalid or device not "
 961                        "found. %s\n", id);
 962         return ret;
 963     }
 964     if (!pci_is_express(dev)) {
 965         monitor_printf(mon, "the device doesn't support pci express. %s\n",
 966                        id);
 967         return -ENOSYS;
 968     }
 969
 970     error_name = qdict_get_str(qdict, "error_status");
 971     if (pcie_aer_parse_error_string(error_name, &error_status, &correctable)) {
 972         char *e = NULL;
 973         error_status = strtoul(error_name, &e, 0);
 974         correctable = qdict_get_try_bool(qdict, "correctable", false);
 975         if (!e || *e != '\0') {
 976             monitor_printf(mon, "invalid error status value. \"%s\"",
 977                            error_name);
 978             return -EINVAL;
 979         }
 980     }
 981     err.status = error_status;
 982     err.source_id = (pci_bus_num(dev->bus) << 8) | dev->devfn;
 983
 984     err.flags = 0;
 985     if (correctable) {
 986         err.flags |= PCIE_AER_ERR_IS_CORRECTABLE;
 987     }
 988     if (qdict_get_try_bool(qdict, "advisory_non_fatal", false)) {
 989         err.flags |= PCIE_AER_ERR_MAYBE_ADVISORY;
 990     }
 991     if (qdict_haskey(qdict, "header0")) {
 992         err.flags |= PCIE_AER_ERR_HEADER_VALID;
 993     }
 994     if (qdict_haskey(qdict, "prefix0")) {
 995         err.flags |= PCIE_AER_ERR_TLP_PREFIX_PRESENT;
 996     }
 997
 998     err.header[0] = qdict_get_try_int(qdict, "header0", 0);
 999     err.header[1] = qdict_get_try_int(qdict, "header1", 0);
1000     err.header[2] = qdict_get_try_int(qdict, "header2", 0);
1001     err.header[3] = qdict_get_try_int(qdict, "header3", 0);
1002
1003     err.prefix[0] = qdict_get_try_int(qdict, "prefix0", 0);
1004     err.prefix[1] = qdict_get_try_int(qdict, "prefix1", 0);
1005     err.prefix[2] = qdict_get_try_int(qdict, "prefix2", 0);
1006     err.prefix[3] = qdict_get_try_int(qdict, "prefix3", 0);
1007
1008     ret = pcie_aer_inject_error(dev, &err);
1009     *ret_data = qobject_from_jsonf("{'id': %s, "
1010                                    "'root_bus': %s, 'bus': %d, 'devfn': %d, "
1011                                    "'ret': %d}",
1012                                    id, pci_root_bus_path(dev),
1013                                    pci_bus_num(dev->bus), dev->devfn,
1014                                    ret);
1015     assert(*ret_data);
1016
1017     return 0;
1018 }
1019
1020 void hmp_pcie_aer_inject_error(Monitor *mon, const QDict *qdict)
1021 {
1022     QObject *data;
1023     int devfn;
1024
1025     if (do_pcie_aer_inject_error(mon, qdict, &data) < 0) {
1026         return;
1027     }
1028
1029     assert(qobject_type(data) == QTYPE_QDICT);
1030     qdict = qobject_to_qdict(data);
1031
1032     devfn = (int)qdict_get_int(qdict, "devfn");
1033     monitor_printf(mon, "OK id: %s root bus: %s, bus: %x devfn: %x.%x\n",
1034                    qdict_get_str(qdict, "id"),
1035                    qdict_get_str(qdict, "root_bus"),
1036                    (int) qdict_get_int(qdict, "bus"),
1037                    PCI_SLOT(devfn), PCI_FUNC(devfn));
1038 }