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xemu/hw/pci/pcie_aer.c
David Gibson 568f0690fd pci: Replace pci_find_domain() with more general pci_root_bus_path() 
pci_find_domain() is used in a number of places where we want an id for a
whole PCI domain (i.e. the subtree under a PCI root bus).  The trouble is
that many platforms may support multiple independent host bridges with no
hardware supplied notion of domain number.

This patch, therefore, replaces calls to pci_find_domain() with calls to
a new pci_root_bus_path() returning a string.  The new call is implemented
in terms of a new callback in the host bridge class, so it can be defined
in some way that's well defined for the platform.  When no callback is
available we fall back on the qbus name.

Most current uses of pci_find_domain() are for error or informational
messages, so the change in identifiers should be harmless.  The exception
is pci_get_dev_path(), whose results form part of migration streams.  To
maintain compatibility with old migration streams, the PIIX PCI host is
altered to always supply "0000" for this path, which matches the old domain
number (since the code didn't actually support domains other than 0).

For the pseries (spapr) PCI bridge we use a different platform-unique
identifier (pseries machines can routinely have dozens of PCI host
bridges).  Theoretically that breaks migration streams, but given that we
don't yet have migration support for pseries, it doesn't matter.

Any other machines that have working migration support including PCI
devices will need to be updated to maintain migration stream compatibility.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2013-07-07 23:10:57 +03:00

1032 lines
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/*
* 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 "sysemu/sysemu.h"
#include "qapi/qmp/types.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"
//#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
/* 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, uint16_t offset)
{
PCIExpressDevice *exp;
pcie_add_capability(dev, PCI_EXT_CAP_ID_ERR, PCI_ERR_VER,
offset, PCI_ERR_SIZEOF);
exp = &dev->exp;
exp->aer_cap = offset;
/* log_max is property */
if (dev->exp.aer_log.log_max == PCIE_AER_LOG_MAX_UNSET) {
dev->exp.aer_log.log_max = PCIE_AER_LOG_MAX_DEFAULT;
}
/* clip down the value to avoid unreasobale memory usage */
if (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_STATUS);
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 {
qemu_set_irq(dev->irq[dev->exp.aer_intx], 1);
}
}
/*
* 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(dev->bus);
}
}
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 = ffs(err->status) - 1;
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];
cpu_to_be32wu((uint32_t*)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_DEVCTL2) &
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];
cpu_to_be32wu((uint32_t*)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 rerror.
*
* 6.2.4 Error Logging
* 6.2.5 Sqeunce of Device Error Signaling and Logging Operations
* table 6-2: Flowchard Showing Sequence of Device Error Signaling and Logging
* Operations
*/
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)) {
qemu_set_irq(dev->irq[dev->exp.aer_intx], !!(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,
.minimum_version_id_old = 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()
}
};
const VMStateDescription vmstate_pcie_aer_log = {
.name = "PCIE_AER_ERROR_LOG",
.version_id = 1,
.minimum_version_id = 1,
.minimum_version_id_old = 1,
.fields = (VMStateField[]) {
VMSTATE_UINT16(log_num, PCIEAERLog),
VMSTATE_UINT16(log_max, PCIEAERLog),
VMSTATE_STRUCT_VARRAY_POINTER_UINT16(log, PCIEAERLog, log_num,
vmstate_pcie_aer_err, PCIEAERErr),
VMSTATE_END_OF_LIST()
}
};
void pcie_aer_inject_error_print(Monitor *mon, const QObject *data)
{
QDict *qdict;
int devfn;
assert(qobject_type(data) == QTYPE_QDICT);
qdict = qobject_to_qdict(data);
devfn = (int)qdict_get_int(qdict, "devfn");
monitor_printf(mon, "OK id: %s root bus: %s, bus: %x devfn: %x.%x\n",
qdict_get_str(qdict, "id"),
qdict_get_str(qdict, "root_bus"),
(int) qdict_get_int(qdict, "bus"),
PCI_SLOT(devfn), PCI_FUNC(devfn));
}
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 = "TRAIN",
.val = PCI_ERR_UNC_TRAIN,
.correctable = false,
}, {
.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;
}
int do_pcie_aer_inject_error(Monitor *mon,
const QDict *qdict, QObject **ret_data)
{
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", 0);
if (!e || *e != '\0') {
monitor_printf(mon, "invalid error status value. \"%s\"",
error_name);
return -EINVAL;
}
}
err.status = error_status;
err.source_id = (pci_bus_num(dev->bus) << 8) | dev->devfn;
err.flags = 0;
if (correctable) {
err.flags |= PCIE_AER_ERR_IS_CORRECTABLE;
}
if (qdict_get_try_bool(qdict, "advisory_non_fatal", 0)) {
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);
*ret_data = qobject_from_jsonf("{'id': %s, "
"'root_bus': %s, 'bus': %d, 'devfn': %d, "
"'ret': %d}",
id, pci_root_bus_path(dev),
pci_bus_num(dev->bus), dev->devfn,
ret);
assert(*ret_data);
return 0;
}
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