diff options
Diffstat (limited to 'hw/pci/pcie_aer.c')
| -rw-r--r-- | hw/pci/pcie_aer.c | 1045 |
1 files changed, 1045 insertions, 0 deletions
diff --git a/hw/pci/pcie_aer.c b/hw/pci/pcie_aer.c new file mode 100644 index 000000000..27f9cc56a --- /dev/null +++ b/hw/pci/pcie_aer.c @@ -0,0 +1,1045 @@ +/* + * pcie_aer.c + * + * Copyright (c) 2010 Isaku Yamahata <yamahata at valinux co jp> + * VA Linux Systems Japan K.K. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, see <http://www.gnu.org/licenses/>. + */ + +#include "qemu/osdep.h" +#include "sysemu/sysemu.h" +#include "qapi/qmp/qdict.h" +#include "migration/vmstate.h" +#include "monitor/monitor.h" +#include "hw/pci/pci_bridge.h" +#include "hw/pci/pcie.h" +#include "hw/pci/msix.h" +#include "hw/pci/msi.h" +#include "hw/pci/pci_bus.h" +#include "hw/pci/pcie_regs.h" +#include "qapi/error.h" + +//#define DEBUG_PCIE +#ifdef DEBUG_PCIE +# define PCIE_DPRINTF(fmt, ...) \ + fprintf(stderr, "%s:%d " fmt, __func__, __LINE__, ## __VA_ARGS__) +#else +# define PCIE_DPRINTF(fmt, ...) do {} while (0) +#endif +#define PCIE_DEV_PRINTF(dev, fmt, ...) \ + PCIE_DPRINTF("%s:%x "fmt, (dev)->name, (dev)->devfn, ## __VA_ARGS__) + +#define PCI_ERR_SRC_COR_OFFS 0 +#define PCI_ERR_SRC_UNCOR_OFFS 2 + +typedef struct PCIEErrorDetails { + const char *id; + const char *root_bus; + int bus; + int devfn; +} PCIEErrorDetails; + +/* From 6.2.7 Error Listing and Rules. Table 6-2, 6-3 and 6-4 */ +static uint32_t pcie_aer_uncor_default_severity(uint32_t status) +{ + switch (status) { + case PCI_ERR_UNC_INTN: + case PCI_ERR_UNC_DLP: + case PCI_ERR_UNC_SDN: + case PCI_ERR_UNC_RX_OVER: + case PCI_ERR_UNC_FCP: + case PCI_ERR_UNC_MALF_TLP: + return PCI_ERR_ROOT_CMD_FATAL_EN; + case PCI_ERR_UNC_POISON_TLP: + case PCI_ERR_UNC_ECRC: + case PCI_ERR_UNC_UNSUP: + case PCI_ERR_UNC_COMP_TIME: + case PCI_ERR_UNC_COMP_ABORT: + case PCI_ERR_UNC_UNX_COMP: + case PCI_ERR_UNC_ACSV: + case PCI_ERR_UNC_MCBTLP: + case PCI_ERR_UNC_ATOP_EBLOCKED: + case PCI_ERR_UNC_TLP_PRF_BLOCKED: + return PCI_ERR_ROOT_CMD_NONFATAL_EN; + default: + abort(); + break; + } + return PCI_ERR_ROOT_CMD_FATAL_EN; +} + +static int aer_log_add_err(PCIEAERLog *aer_log, const PCIEAERErr *err) +{ + if (aer_log->log_num == aer_log->log_max) { + return -1; + } + memcpy(&aer_log->log[aer_log->log_num], err, sizeof *err); + aer_log->log_num++; + return 0; +} + +static void aer_log_del_err(PCIEAERLog *aer_log, PCIEAERErr *err) +{ + assert(aer_log->log_num); + *err = aer_log->log[0]; + aer_log->log_num--; + memmove(&aer_log->log[0], &aer_log->log[1], + aer_log->log_num * sizeof *err); +} + +static void aer_log_clear_all_err(PCIEAERLog *aer_log) +{ + aer_log->log_num = 0; +} + +int pcie_aer_init(PCIDevice *dev, uint8_t cap_ver, uint16_t offset, + uint16_t size, Error **errp) +{ + pcie_add_capability(dev, PCI_EXT_CAP_ID_ERR, cap_ver, + offset, size); + dev->exp.aer_cap = offset; + + /* clip down the value to avoid unreasonable memory usage */ + if (dev->exp.aer_log.log_max > PCIE_AER_LOG_MAX_LIMIT) { + error_setg(errp, "Invalid aer_log_max %d. The max number of aer log " + "is %d", dev->exp.aer_log.log_max, PCIE_AER_LOG_MAX_LIMIT); + return -EINVAL; + } + dev->exp.aer_log.log = g_malloc0(sizeof dev->exp.aer_log.log[0] * + dev->exp.aer_log.log_max); + + pci_set_long(dev->w1cmask + offset + PCI_ERR_UNCOR_STATUS, + PCI_ERR_UNC_SUPPORTED); + + pci_set_long(dev->config + offset + PCI_ERR_UNCOR_SEVER, + PCI_ERR_UNC_SEVERITY_DEFAULT); + pci_set_long(dev->wmask + offset + PCI_ERR_UNCOR_SEVER, + PCI_ERR_UNC_SUPPORTED); + + pci_long_test_and_set_mask(dev->w1cmask + offset + PCI_ERR_COR_STATUS, + PCI_ERR_COR_SUPPORTED); + + pci_set_long(dev->config + offset + PCI_ERR_COR_MASK, + PCI_ERR_COR_MASK_DEFAULT); + pci_set_long(dev->wmask + offset + PCI_ERR_COR_MASK, + PCI_ERR_COR_SUPPORTED); + + /* capabilities and control. multiple header logging is supported */ + if (dev->exp.aer_log.log_max > 0) { + pci_set_long(dev->config + offset + PCI_ERR_CAP, + PCI_ERR_CAP_ECRC_GENC | PCI_ERR_CAP_ECRC_CHKC | + PCI_ERR_CAP_MHRC); + pci_set_long(dev->wmask + offset + PCI_ERR_CAP, + PCI_ERR_CAP_ECRC_GENE | PCI_ERR_CAP_ECRC_CHKE | + PCI_ERR_CAP_MHRE); + } else { + pci_set_long(dev->config + offset + PCI_ERR_CAP, + PCI_ERR_CAP_ECRC_GENC | PCI_ERR_CAP_ECRC_CHKC); + pci_set_long(dev->wmask + offset + PCI_ERR_CAP, + PCI_ERR_CAP_ECRC_GENE | PCI_ERR_CAP_ECRC_CHKE); + } + + switch (pcie_cap_get_type(dev)) { + case PCI_EXP_TYPE_ROOT_PORT: + /* this case will be set by pcie_aer_root_init() */ + /* fallthrough */ + case PCI_EXP_TYPE_DOWNSTREAM: + case PCI_EXP_TYPE_UPSTREAM: + pci_word_test_and_set_mask(dev->wmask + PCI_BRIDGE_CONTROL, + PCI_BRIDGE_CTL_SERR); + pci_long_test_and_set_mask(dev->w1cmask + PCI_STATUS, + PCI_SEC_STATUS_RCV_SYSTEM_ERROR); + break; + default: + /* nothing */ + break; + } + return 0; +} + +void pcie_aer_exit(PCIDevice *dev) +{ + g_free(dev->exp.aer_log.log); +} + +static void pcie_aer_update_uncor_status(PCIDevice *dev) +{ + uint8_t *aer_cap = dev->config + dev->exp.aer_cap; + PCIEAERLog *aer_log = &dev->exp.aer_log; + + uint16_t i; + for (i = 0; i < aer_log->log_num; i++) { + pci_long_test_and_set_mask(aer_cap + PCI_ERR_UNCOR_STATUS, + dev->exp.aer_log.log[i].status); + } +} + +/* + * return value: + * true: error message needs to be sent up + * false: error message is masked + * + * 6.2.6 Error Message Control + * Figure 6-3 + * all pci express devices part + */ +static bool +pcie_aer_msg_alldev(PCIDevice *dev, const PCIEAERMsg *msg) +{ + if (!(pcie_aer_msg_is_uncor(msg) && + (pci_get_word(dev->config + PCI_COMMAND) & PCI_COMMAND_SERR))) { + return false; + } + + /* Signaled System Error + * + * 7.5.1.1 Command register + * Bit 8 SERR# Enable + * + * When Set, this bit enables reporting of Non-fatal and Fatal + * errors detected by the Function to the Root Complex. Note that + * errors are reported if enabled either through this bit or through + * the PCI Express specific bits in the Device Control register (see + * Section 7.8.4). + */ + pci_word_test_and_set_mask(dev->config + PCI_STATUS, + PCI_STATUS_SIG_SYSTEM_ERROR); + + if (!(msg->severity & + pci_get_word(dev->config + dev->exp.exp_cap + PCI_EXP_DEVCTL))) { + return false; + } + + /* send up error message */ + return true; +} + +/* + * return value: + * true: error message is sent up + * false: error message is masked + * + * 6.2.6 Error Message Control + * Figure 6-3 + * virtual pci bridge part + */ +static bool pcie_aer_msg_vbridge(PCIDevice *dev, const PCIEAERMsg *msg) +{ + uint16_t bridge_control = pci_get_word(dev->config + PCI_BRIDGE_CONTROL); + + if (pcie_aer_msg_is_uncor(msg)) { + /* Received System Error */ + pci_word_test_and_set_mask(dev->config + PCI_SEC_STATUS, + PCI_SEC_STATUS_RCV_SYSTEM_ERROR); + } + + if (!(bridge_control & PCI_BRIDGE_CTL_SERR)) { + return false; + } + return true; +} + +void pcie_aer_root_set_vector(PCIDevice *dev, unsigned int vector) +{ + uint8_t *aer_cap = dev->config + dev->exp.aer_cap; + assert(vector < PCI_ERR_ROOT_IRQ_MAX); + pci_long_test_and_clear_mask(aer_cap + PCI_ERR_ROOT_STATUS, + PCI_ERR_ROOT_IRQ); + pci_long_test_and_set_mask(aer_cap + PCI_ERR_ROOT_STATUS, + vector << PCI_ERR_ROOT_IRQ_SHIFT); +} + +static unsigned int pcie_aer_root_get_vector(PCIDevice *dev) +{ + uint8_t *aer_cap = dev->config + dev->exp.aer_cap; + uint32_t root_status = pci_get_long(aer_cap + PCI_ERR_ROOT_STATUS); + return (root_status & PCI_ERR_ROOT_IRQ) >> PCI_ERR_ROOT_IRQ_SHIFT; +} + +/* Given a status register, get corresponding bits in the command register */ +static uint32_t pcie_aer_status_to_cmd(uint32_t status) +{ + uint32_t cmd = 0; + if (status & PCI_ERR_ROOT_COR_RCV) { + cmd |= PCI_ERR_ROOT_CMD_COR_EN; + } + if (status & PCI_ERR_ROOT_NONFATAL_RCV) { + cmd |= PCI_ERR_ROOT_CMD_NONFATAL_EN; + } + if (status & PCI_ERR_ROOT_FATAL_RCV) { + cmd |= PCI_ERR_ROOT_CMD_FATAL_EN; + } + return cmd; +} + +static void pcie_aer_root_notify(PCIDevice *dev) +{ + if (msix_enabled(dev)) { + msix_notify(dev, pcie_aer_root_get_vector(dev)); + } else if (msi_enabled(dev)) { + msi_notify(dev, pcie_aer_root_get_vector(dev)); + } else { + pci_irq_assert(dev); + } +} + +/* + * 6.2.6 Error Message Control + * Figure 6-3 + * root port part + */ +static void pcie_aer_msg_root_port(PCIDevice *dev, const PCIEAERMsg *msg) +{ + uint16_t cmd; + uint8_t *aer_cap; + uint32_t root_cmd; + uint32_t root_status, prev_status; + + cmd = pci_get_word(dev->config + PCI_COMMAND); + aer_cap = dev->config + dev->exp.aer_cap; + root_cmd = pci_get_long(aer_cap + PCI_ERR_ROOT_COMMAND); + prev_status = root_status = pci_get_long(aer_cap + PCI_ERR_ROOT_STATUS); + + if (cmd & PCI_COMMAND_SERR) { + /* System Error. + * + * The way to report System Error is platform specific and + * it isn't implemented in qemu right now. + * So just discard the error for now. + * OS which cares of aer would receive errors via + * native aer mechanims, so this wouldn't matter. + */ + } + + /* Errro Message Received: Root Error Status register */ + switch (msg->severity) { + case PCI_ERR_ROOT_CMD_COR_EN: + if (root_status & PCI_ERR_ROOT_COR_RCV) { + root_status |= PCI_ERR_ROOT_MULTI_COR_RCV; + } else { + pci_set_word(aer_cap + PCI_ERR_ROOT_ERR_SRC + PCI_ERR_SRC_COR_OFFS, + msg->source_id); + } + root_status |= PCI_ERR_ROOT_COR_RCV; + break; + case PCI_ERR_ROOT_CMD_NONFATAL_EN: + root_status |= PCI_ERR_ROOT_NONFATAL_RCV; + break; + case PCI_ERR_ROOT_CMD_FATAL_EN: + if (!(root_status & PCI_ERR_ROOT_UNCOR_RCV)) { + root_status |= PCI_ERR_ROOT_FIRST_FATAL; + } + root_status |= PCI_ERR_ROOT_FATAL_RCV; + break; + default: + abort(); + break; + } + if (pcie_aer_msg_is_uncor(msg)) { + if (root_status & PCI_ERR_ROOT_UNCOR_RCV) { + root_status |= PCI_ERR_ROOT_MULTI_UNCOR_RCV; + } else { + pci_set_word(aer_cap + PCI_ERR_ROOT_ERR_SRC + + PCI_ERR_SRC_UNCOR_OFFS, msg->source_id); + } + root_status |= PCI_ERR_ROOT_UNCOR_RCV; + } + pci_set_long(aer_cap + PCI_ERR_ROOT_STATUS, root_status); + + /* 6.2.4.1.2 Interrupt Generation */ + /* All the above did was set some bits in the status register. + * Specifically these that match message severity. + * The below code relies on this fact. */ + if (!(root_cmd & msg->severity) || + (pcie_aer_status_to_cmd(prev_status) & root_cmd)) { + /* Condition is not being set or was already true so nothing to do. */ + return; + } + + pcie_aer_root_notify(dev); +} + +/* + * 6.2.6 Error Message Control Figure 6-3 + * + * Walk up the bus tree from the device, propagate the error message. + */ +static void pcie_aer_msg(PCIDevice *dev, const PCIEAERMsg *msg) +{ + uint8_t type; + + while (dev) { + if (!pci_is_express(dev)) { + /* just ignore it */ + /* TODO: Shouldn't we set PCI_STATUS_SIG_SYSTEM_ERROR? + * Consider e.g. a PCI bridge above a PCI Express device. */ + return; + } + + type = pcie_cap_get_type(dev); + if ((type == PCI_EXP_TYPE_ROOT_PORT || + type == PCI_EXP_TYPE_UPSTREAM || + type == PCI_EXP_TYPE_DOWNSTREAM) && + !pcie_aer_msg_vbridge(dev, msg)) { + return; + } + if (!pcie_aer_msg_alldev(dev, msg)) { + return; + } + if (type == PCI_EXP_TYPE_ROOT_PORT) { + pcie_aer_msg_root_port(dev, msg); + /* Root port can notify system itself, + or send the error message to root complex event collector. */ + /* + * if root port is associated with an event collector, + * return the root complex event collector here. + * For now root complex event collector isn't supported. + */ + return; + } + dev = pci_bridge_get_device(pci_get_bus(dev)); + } +} + +static void pcie_aer_update_log(PCIDevice *dev, const PCIEAERErr *err) +{ + uint8_t *aer_cap = dev->config + dev->exp.aer_cap; + uint8_t first_bit = ctz32(err->status); + uint32_t errcap = pci_get_long(aer_cap + PCI_ERR_CAP); + int i; + + assert(err->status); + assert(!(err->status & (err->status - 1))); + + errcap &= ~(PCI_ERR_CAP_FEP_MASK | PCI_ERR_CAP_TLP); + errcap |= PCI_ERR_CAP_FEP(first_bit); + + if (err->flags & PCIE_AER_ERR_HEADER_VALID) { + for (i = 0; i < ARRAY_SIZE(err->header); ++i) { + /* 7.10.8 Header Log Register */ + uint8_t *header_log = + aer_cap + PCI_ERR_HEADER_LOG + i * sizeof err->header[0]; + stl_be_p(header_log, err->header[i]); + } + } else { + assert(!(err->flags & PCIE_AER_ERR_TLP_PREFIX_PRESENT)); + memset(aer_cap + PCI_ERR_HEADER_LOG, 0, PCI_ERR_HEADER_LOG_SIZE); + } + + if ((err->flags & PCIE_AER_ERR_TLP_PREFIX_PRESENT) && + (pci_get_long(dev->config + dev->exp.exp_cap + PCI_EXP_DEVCAP2) & + PCI_EXP_DEVCAP2_EETLPP)) { + for (i = 0; i < ARRAY_SIZE(err->prefix); ++i) { + /* 7.10.12 tlp prefix log register */ + uint8_t *prefix_log = + aer_cap + PCI_ERR_TLP_PREFIX_LOG + i * sizeof err->prefix[0]; + stl_be_p(prefix_log, err->prefix[i]); + } + errcap |= PCI_ERR_CAP_TLP; + } else { + memset(aer_cap + PCI_ERR_TLP_PREFIX_LOG, 0, + PCI_ERR_TLP_PREFIX_LOG_SIZE); + } + pci_set_long(aer_cap + PCI_ERR_CAP, errcap); +} + +static void pcie_aer_clear_log(PCIDevice *dev) +{ + uint8_t *aer_cap = dev->config + dev->exp.aer_cap; + + pci_long_test_and_clear_mask(aer_cap + PCI_ERR_CAP, + PCI_ERR_CAP_FEP_MASK | PCI_ERR_CAP_TLP); + + memset(aer_cap + PCI_ERR_HEADER_LOG, 0, PCI_ERR_HEADER_LOG_SIZE); + memset(aer_cap + PCI_ERR_TLP_PREFIX_LOG, 0, PCI_ERR_TLP_PREFIX_LOG_SIZE); +} + +static void pcie_aer_clear_error(PCIDevice *dev) +{ + uint8_t *aer_cap = dev->config + dev->exp.aer_cap; + uint32_t errcap = pci_get_long(aer_cap + PCI_ERR_CAP); + PCIEAERLog *aer_log = &dev->exp.aer_log; + PCIEAERErr err; + + if (!(errcap & PCI_ERR_CAP_MHRE) || !aer_log->log_num) { + pcie_aer_clear_log(dev); + return; + } + + /* + * If more errors are queued, set corresponding bits in uncorrectable + * error status. + * We emulate uncorrectable error status register as W1CS. + * So set bit in uncorrectable error status here again for multiple + * error recording support. + * + * 6.2.4.2 Multiple Error Handling(Advanced Error Reporting Capability) + */ + pcie_aer_update_uncor_status(dev); + + aer_log_del_err(aer_log, &err); + pcie_aer_update_log(dev, &err); +} + +static int pcie_aer_record_error(PCIDevice *dev, + const PCIEAERErr *err) +{ + uint8_t *aer_cap = dev->config + dev->exp.aer_cap; + uint32_t errcap = pci_get_long(aer_cap + PCI_ERR_CAP); + int fep = PCI_ERR_CAP_FEP(errcap); + + assert(err->status); + assert(!(err->status & (err->status - 1))); + + if (errcap & PCI_ERR_CAP_MHRE && + (pci_get_long(aer_cap + PCI_ERR_UNCOR_STATUS) & (1U << fep))) { + /* Not first error. queue error */ + if (aer_log_add_err(&dev->exp.aer_log, err) < 0) { + /* overflow */ + return -1; + } + return 0; + } + + pcie_aer_update_log(dev, err); + return 0; +} + +typedef struct PCIEAERInject { + PCIDevice *dev; + uint8_t *aer_cap; + const PCIEAERErr *err; + uint16_t devctl; + uint16_t devsta; + uint32_t error_status; + bool unsupported_request; + bool log_overflow; + PCIEAERMsg msg; +} PCIEAERInject; + +static bool pcie_aer_inject_cor_error(PCIEAERInject *inj, + uint32_t uncor_status, + bool is_advisory_nonfatal) +{ + PCIDevice *dev = inj->dev; + + inj->devsta |= PCI_EXP_DEVSTA_CED; + if (inj->unsupported_request) { + inj->devsta |= PCI_EXP_DEVSTA_URD; + } + pci_set_word(dev->config + dev->exp.exp_cap + PCI_EXP_DEVSTA, inj->devsta); + + if (inj->aer_cap) { + uint32_t mask; + pci_long_test_and_set_mask(inj->aer_cap + PCI_ERR_COR_STATUS, + inj->error_status); + mask = pci_get_long(inj->aer_cap + PCI_ERR_COR_MASK); + if (mask & inj->error_status) { + return false; + } + if (is_advisory_nonfatal) { + uint32_t uncor_mask = + pci_get_long(inj->aer_cap + PCI_ERR_UNCOR_MASK); + if (!(uncor_mask & uncor_status)) { + inj->log_overflow = !!pcie_aer_record_error(dev, inj->err); + } + pci_long_test_and_set_mask(inj->aer_cap + PCI_ERR_UNCOR_STATUS, + uncor_status); + } + } + + if (inj->unsupported_request && !(inj->devctl & PCI_EXP_DEVCTL_URRE)) { + return false; + } + if (!(inj->devctl & PCI_EXP_DEVCTL_CERE)) { + return false; + } + + inj->msg.severity = PCI_ERR_ROOT_CMD_COR_EN; + return true; +} + +static bool pcie_aer_inject_uncor_error(PCIEAERInject *inj, bool is_fatal) +{ + PCIDevice *dev = inj->dev; + uint16_t cmd; + + if (is_fatal) { + inj->devsta |= PCI_EXP_DEVSTA_FED; + } else { + inj->devsta |= PCI_EXP_DEVSTA_NFED; + } + if (inj->unsupported_request) { + inj->devsta |= PCI_EXP_DEVSTA_URD; + } + pci_set_long(dev->config + dev->exp.exp_cap + PCI_EXP_DEVSTA, inj->devsta); + + if (inj->aer_cap) { + uint32_t mask = pci_get_long(inj->aer_cap + PCI_ERR_UNCOR_MASK); + if (mask & inj->error_status) { + pci_long_test_and_set_mask(inj->aer_cap + PCI_ERR_UNCOR_STATUS, + inj->error_status); + return false; + } + + inj->log_overflow = !!pcie_aer_record_error(dev, inj->err); + pci_long_test_and_set_mask(inj->aer_cap + PCI_ERR_UNCOR_STATUS, + inj->error_status); + } + + cmd = pci_get_word(dev->config + PCI_COMMAND); + if (inj->unsupported_request && + !(inj->devctl & PCI_EXP_DEVCTL_URRE) && !(cmd & PCI_COMMAND_SERR)) { + return false; + } + if (is_fatal) { + if (!((cmd & PCI_COMMAND_SERR) || + (inj->devctl & PCI_EXP_DEVCTL_FERE))) { + return false; + } + inj->msg.severity = PCI_ERR_ROOT_CMD_FATAL_EN; + } else { + if (!((cmd & PCI_COMMAND_SERR) || + (inj->devctl & PCI_EXP_DEVCTL_NFERE))) { + return false; + } + inj->msg.severity = PCI_ERR_ROOT_CMD_NONFATAL_EN; + } + return true; +} + +/* + * non-Function specific error must be recorded in all functions. + * It is the responsibility of the caller of this function. + * It is also caller's responsibility to determine which function should + * report the error. + * + * 6.2.4 Error Logging + * 6.2.5 Sequence of Device Error Signaling and Logging Operations + * Figure 6-2: Flowchart Showing Sequence of Device Error Signaling and Logging + * Operations + */ +static int pcie_aer_inject_error(PCIDevice *dev, const PCIEAERErr *err) +{ + uint8_t *aer_cap = NULL; + uint16_t devctl = 0; + uint16_t devsta = 0; + uint32_t error_status = err->status; + PCIEAERInject inj; + + if (!pci_is_express(dev)) { + return -ENOSYS; + } + + if (err->flags & PCIE_AER_ERR_IS_CORRECTABLE) { + error_status &= PCI_ERR_COR_SUPPORTED; + } else { + error_status &= PCI_ERR_UNC_SUPPORTED; + } + + /* invalid status bit. one and only one bit must be set */ + if (!error_status || (error_status & (error_status - 1))) { + return -EINVAL; + } + + if (dev->exp.aer_cap) { + uint8_t *exp_cap = dev->config + dev->exp.exp_cap; + aer_cap = dev->config + dev->exp.aer_cap; + devctl = pci_get_long(exp_cap + PCI_EXP_DEVCTL); + devsta = pci_get_long(exp_cap + PCI_EXP_DEVSTA); + } + + inj.dev = dev; + inj.aer_cap = aer_cap; + inj.err = err; + inj.devctl = devctl; + inj.devsta = devsta; + inj.error_status = error_status; + inj.unsupported_request = !(err->flags & PCIE_AER_ERR_IS_CORRECTABLE) && + err->status == PCI_ERR_UNC_UNSUP; + inj.log_overflow = false; + + if (err->flags & PCIE_AER_ERR_IS_CORRECTABLE) { + if (!pcie_aer_inject_cor_error(&inj, 0, false)) { + return 0; + } + } else { + bool is_fatal = + pcie_aer_uncor_default_severity(error_status) == + PCI_ERR_ROOT_CMD_FATAL_EN; + if (aer_cap) { + is_fatal = + error_status & pci_get_long(aer_cap + PCI_ERR_UNCOR_SEVER); + } + if (!is_fatal && (err->flags & PCIE_AER_ERR_MAYBE_ADVISORY)) { + inj.error_status = PCI_ERR_COR_ADV_NONFATAL; + if (!pcie_aer_inject_cor_error(&inj, error_status, true)) { + return 0; + } + } else { + if (!pcie_aer_inject_uncor_error(&inj, is_fatal)) { + return 0; + } + } + } + + /* send up error message */ + inj.msg.source_id = err->source_id; + pcie_aer_msg(dev, &inj.msg); + + if (inj.log_overflow) { + PCIEAERErr header_log_overflow = { + .status = PCI_ERR_COR_HL_OVERFLOW, + .flags = PCIE_AER_ERR_IS_CORRECTABLE, + }; + int ret = pcie_aer_inject_error(dev, &header_log_overflow); + assert(!ret); + } + return 0; +} + +void pcie_aer_write_config(PCIDevice *dev, + uint32_t addr, uint32_t val, int len) +{ + uint8_t *aer_cap = dev->config + dev->exp.aer_cap; + uint32_t errcap = pci_get_long(aer_cap + PCI_ERR_CAP); + uint32_t first_error = 1U << PCI_ERR_CAP_FEP(errcap); + uint32_t uncorsta = pci_get_long(aer_cap + PCI_ERR_UNCOR_STATUS); + + /* uncorrectable error */ + if (!(uncorsta & first_error)) { + /* the bit that corresponds to the first error is cleared */ + pcie_aer_clear_error(dev); + } else if (errcap & PCI_ERR_CAP_MHRE) { + /* When PCI_ERR_CAP_MHRE is enabled and the first error isn't cleared + * nothing should happen. So we have to revert the modification to + * the register. + */ + pcie_aer_update_uncor_status(dev); + } else { + /* capability & control + * PCI_ERR_CAP_MHRE might be cleared, so clear of header log. + */ + aer_log_clear_all_err(&dev->exp.aer_log); + } +} + +void pcie_aer_root_init(PCIDevice *dev) +{ + uint16_t pos = dev->exp.aer_cap; + + pci_set_long(dev->wmask + pos + PCI_ERR_ROOT_COMMAND, + PCI_ERR_ROOT_CMD_EN_MASK); + pci_set_long(dev->w1cmask + pos + PCI_ERR_ROOT_STATUS, + PCI_ERR_ROOT_STATUS_REPORT_MASK); + /* PCI_ERR_ROOT_IRQ is RO but devices change it using a + * device-specific method. + */ + pci_set_long(dev->cmask + pos + PCI_ERR_ROOT_STATUS, + ~PCI_ERR_ROOT_IRQ); +} + +void pcie_aer_root_reset(PCIDevice *dev) +{ + uint8_t* aer_cap = dev->config + dev->exp.aer_cap; + + pci_set_long(aer_cap + PCI_ERR_ROOT_COMMAND, 0); + + /* + * Advanced Error Interrupt Message Number in Root Error Status Register + * must be updated by chip dependent code because it's chip dependent + * which number is used. + */ +} + +void pcie_aer_root_write_config(PCIDevice *dev, + uint32_t addr, uint32_t val, int len, + uint32_t root_cmd_prev) +{ + uint8_t *aer_cap = dev->config + dev->exp.aer_cap; + uint32_t root_status = pci_get_long(aer_cap + PCI_ERR_ROOT_STATUS); + uint32_t enabled_cmd = pcie_aer_status_to_cmd(root_status); + uint32_t root_cmd = pci_get_long(aer_cap + PCI_ERR_ROOT_COMMAND); + /* 6.2.4.1.2 Interrupt Generation */ + if (!msix_enabled(dev) && !msi_enabled(dev)) { + pci_set_irq(dev, !!(root_cmd & enabled_cmd)); + return; + } + + if ((root_cmd_prev & enabled_cmd) || !(root_cmd & enabled_cmd)) { + /* Send MSI on transition from false to true. */ + return; + } + + pcie_aer_root_notify(dev); +} + +static const VMStateDescription vmstate_pcie_aer_err = { + .name = "PCIE_AER_ERROR", + .version_id = 1, + .minimum_version_id = 1, + .fields = (VMStateField[]) { + VMSTATE_UINT32(status, PCIEAERErr), + VMSTATE_UINT16(source_id, PCIEAERErr), + VMSTATE_UINT16(flags, PCIEAERErr), + VMSTATE_UINT32_ARRAY(header, PCIEAERErr, 4), + VMSTATE_UINT32_ARRAY(prefix, PCIEAERErr, 4), + VMSTATE_END_OF_LIST() + } +}; + +static bool pcie_aer_state_log_num_valid(void *opaque, int version_id) +{ + PCIEAERLog *s = opaque; + + return s->log_num <= s->log_max; +} + +const VMStateDescription vmstate_pcie_aer_log = { + .name = "PCIE_AER_ERROR_LOG", + .version_id = 1, + .minimum_version_id = 1, + .fields = (VMStateField[]) { + VMSTATE_UINT16(log_num, PCIEAERLog), + VMSTATE_UINT16_EQUAL(log_max, PCIEAERLog, NULL), + VMSTATE_VALIDATE("log_num <= log_max", pcie_aer_state_log_num_valid), + VMSTATE_STRUCT_VARRAY_POINTER_UINT16(log, PCIEAERLog, log_num, + vmstate_pcie_aer_err, PCIEAERErr), + VMSTATE_END_OF_LIST() + } +}; + +typedef struct PCIEAERErrorName { + const char *name; + uint32_t val; + bool correctable; +} PCIEAERErrorName; + +/* + * AER error name -> value conversion table + * This naming scheme is same to linux aer-injection tool. + */ +static const struct PCIEAERErrorName pcie_aer_error_list[] = { + { + .name = "DLP", + .val = PCI_ERR_UNC_DLP, + .correctable = false, + }, { + .name = "SDN", + .val = PCI_ERR_UNC_SDN, + .correctable = false, + }, { + .name = "POISON_TLP", + .val = PCI_ERR_UNC_POISON_TLP, + .correctable = false, + }, { + .name = "FCP", + .val = PCI_ERR_UNC_FCP, + .correctable = false, + }, { + .name = "COMP_TIME", + .val = PCI_ERR_UNC_COMP_TIME, + .correctable = false, + }, { + .name = "COMP_ABORT", + .val = PCI_ERR_UNC_COMP_ABORT, + .correctable = false, + }, { + .name = "UNX_COMP", + .val = PCI_ERR_UNC_UNX_COMP, + .correctable = false, + }, { + .name = "RX_OVER", + .val = PCI_ERR_UNC_RX_OVER, + .correctable = false, + }, { + .name = "MALF_TLP", + .val = PCI_ERR_UNC_MALF_TLP, + .correctable = false, + }, { + .name = "ECRC", + .val = PCI_ERR_UNC_ECRC, + .correctable = false, + }, { + .name = "UNSUP", + .val = PCI_ERR_UNC_UNSUP, + .correctable = false, + }, { + .name = "ACSV", + .val = PCI_ERR_UNC_ACSV, + .correctable = false, + }, { + .name = "INTN", + .val = PCI_ERR_UNC_INTN, + .correctable = false, + }, { + .name = "MCBTLP", + .val = PCI_ERR_UNC_MCBTLP, + .correctable = false, + }, { + .name = "ATOP_EBLOCKED", + .val = PCI_ERR_UNC_ATOP_EBLOCKED, + .correctable = false, + }, { + .name = "TLP_PRF_BLOCKED", + .val = PCI_ERR_UNC_TLP_PRF_BLOCKED, + .correctable = false, + }, { + .name = "RCVR", + .val = PCI_ERR_COR_RCVR, + .correctable = true, + }, { + .name = "BAD_TLP", + .val = PCI_ERR_COR_BAD_TLP, + .correctable = true, + }, { + .name = "BAD_DLLP", + .val = PCI_ERR_COR_BAD_DLLP, + .correctable = true, + }, { + .name = "REP_ROLL", + .val = PCI_ERR_COR_REP_ROLL, + .correctable = true, + }, { + .name = "REP_TIMER", + .val = PCI_ERR_COR_REP_TIMER, + .correctable = true, + }, { + .name = "ADV_NONFATAL", + .val = PCI_ERR_COR_ADV_NONFATAL, + .correctable = true, + }, { + .name = "INTERNAL", + .val = PCI_ERR_COR_INTERNAL, + .correctable = true, + }, { + .name = "HL_OVERFLOW", + .val = PCI_ERR_COR_HL_OVERFLOW, + .correctable = true, + }, +}; + +static int pcie_aer_parse_error_string(const char *error_name, + uint32_t *status, bool *correctable) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(pcie_aer_error_list); i++) { + const PCIEAERErrorName *e = &pcie_aer_error_list[i]; + if (strcmp(error_name, e->name)) { + continue; + } + + *status = e->val; + *correctable = e->correctable; + return 0; + } + return -EINVAL; +} + +/* + * Inject an error described by @qdict. + * On success, set @details to show where error was sent. + * Return negative errno if injection failed and a message was emitted. + */ +static int do_pcie_aer_inject_error(Monitor *mon, + const QDict *qdict, + PCIEErrorDetails *details) +{ + const char *id = qdict_get_str(qdict, "id"); + const char *error_name; + uint32_t error_status; + bool correctable; + PCIDevice *dev; + PCIEAERErr err; + int ret; + + ret = pci_qdev_find_device(id, &dev); + if (ret < 0) { + monitor_printf(mon, + "id or pci device path is invalid or device not " + "found. %s\n", id); + return ret; + } + if (!pci_is_express(dev)) { + monitor_printf(mon, "the device doesn't support pci express. %s\n", + id); + return -ENOSYS; + } + + error_name = qdict_get_str(qdict, "error_status"); + if (pcie_aer_parse_error_string(error_name, &error_status, &correctable)) { + char *e = NULL; + error_status = strtoul(error_name, &e, 0); + correctable = qdict_get_try_bool(qdict, "correctable", false); + if (!e || *e != '\0') { + monitor_printf(mon, "invalid error status value. \"%s\"", + error_name); + return -EINVAL; + } + } + err.status = error_status; + err.source_id = pci_requester_id(dev); + + err.flags = 0; + if (correctable) { + err.flags |= PCIE_AER_ERR_IS_CORRECTABLE; + } + if (qdict_get_try_bool(qdict, "advisory_non_fatal", false)) { + err.flags |= PCIE_AER_ERR_MAYBE_ADVISORY; + } + if (qdict_haskey(qdict, "header0")) { + err.flags |= PCIE_AER_ERR_HEADER_VALID; + } + if (qdict_haskey(qdict, "prefix0")) { + err.flags |= PCIE_AER_ERR_TLP_PREFIX_PRESENT; + } + + err.header[0] = qdict_get_try_int(qdict, "header0", 0); + err.header[1] = qdict_get_try_int(qdict, "header1", 0); + err.header[2] = qdict_get_try_int(qdict, "header2", 0); + err.header[3] = qdict_get_try_int(qdict, "header3", 0); + + err.prefix[0] = qdict_get_try_int(qdict, "prefix0", 0); + err.prefix[1] = qdict_get_try_int(qdict, "prefix1", 0); + err.prefix[2] = qdict_get_try_int(qdict, "prefix2", 0); + err.prefix[3] = qdict_get_try_int(qdict, "prefix3", 0); + + ret = pcie_aer_inject_error(dev, &err); + if (ret < 0) { + monitor_printf(mon, "failed to inject error: %s\n", + strerror(-ret)); + return ret; + } + details->id = id; + details->root_bus = pci_root_bus_path(dev); + details->bus = pci_dev_bus_num(dev); + details->devfn = dev->devfn; + + return 0; +} + +void hmp_pcie_aer_inject_error(Monitor *mon, const QDict *qdict) +{ + PCIEErrorDetails data; + + if (do_pcie_aer_inject_error(mon, qdict, &data) < 0) { + return; + } + + monitor_printf(mon, "OK id: %s root bus: %s, bus: %x devfn: %x.%x\n", + data.id, data.root_bus, data.bus, + PCI_SLOT(data.devfn), PCI_FUNC(data.devfn)); +} |