*
*/
+#include "qemu/osdep.h"
+#include "qapi/error.h"
#include "qemu-common.h"
+#include "qemu/cutils.h"
#include "xen-host-pci-device.h"
#define XEN_HOST_PCI_MAX_EXT_CAP \
#define IORESOURCE_PREFETCH 0x00001000 /* No side effects */
#define IORESOURCE_MEM_64 0x00100000
-static int xen_host_pci_sysfs_path(const XenHostPCIDevice *d,
- const char *name, char *buf, ssize_t size)
+static void xen_host_pci_sysfs_path(const XenHostPCIDevice *d,
+ const char *name, char *buf, ssize_t size)
{
int rc;
rc = snprintf(buf, size, "/sys/bus/pci/devices/%04x:%02x:%02x.%d/%s",
d->domain, d->bus, d->dev, d->func, name);
-
- if (rc >= size || rc < 0) {
- /* The ouput is truncated or an other error is encountered */
- return -ENODEV;
- }
- return 0;
+ assert(rc >= 0 && rc < size);
}
/* This size should be enough to read the first 7 lines of a resource file */
#define XEN_HOST_PCI_RESOURCE_BUFFER_SIZE 400
-static int xen_host_pci_get_resource(XenHostPCIDevice *d)
+static void xen_host_pci_get_resource(XenHostPCIDevice *d, Error **errp)
{
int i, rc, fd;
char path[PATH_MAX];
char *endptr, *s;
uint8_t type;
- rc = xen_host_pci_sysfs_path(d, "resource", path, sizeof (path));
- if (rc) {
- return rc;
- }
+ xen_host_pci_sysfs_path(d, "resource", path, sizeof(path));
+
fd = open(path, O_RDONLY);
if (fd == -1) {
- XEN_HOST_PCI_LOG("Error: Can't open %s: %s\n", path, strerror(errno));
- return -errno;
+ error_setg_file_open(errp, errno, path);
+ return;
}
do {
- rc = read(fd, &buf, sizeof (buf) - 1);
+ rc = read(fd, &buf, sizeof(buf) - 1);
if (rc < 0 && errno != EINTR) {
- rc = -errno;
+ error_setg_errno(errp, errno, "read err");
goto out;
}
} while (rc < 0);
buf[rc] = 0;
- rc = 0;
s = buf;
for (i = 0; i < PCI_NUM_REGIONS; i++) {
d->rom.bus_flags = flags & IORESOURCE_BITS;
}
}
+
if (i != PCI_NUM_REGIONS) {
- /* Invalid format or input to short */
- rc = -ENODEV;
+ error_setg(errp, "Invalid format or input too short: %s", buf);
}
out:
close(fd);
- return rc;
}
/* This size should be enough to read a long from a file */
#define XEN_HOST_PCI_GET_VALUE_BUFFER_SIZE 22
-static int xen_host_pci_get_value(XenHostPCIDevice *d, const char *name,
- unsigned int *pvalue, int base)
+static void xen_host_pci_get_value(XenHostPCIDevice *d, const char *name,
+ unsigned int *pvalue, int base, Error **errp)
{
char path[PATH_MAX];
char buf[XEN_HOST_PCI_GET_VALUE_BUFFER_SIZE];
int fd, rc;
unsigned long value;
- char *endptr;
+ const char *endptr;
+
+ xen_host_pci_sysfs_path(d, name, path, sizeof(path));
- rc = xen_host_pci_sysfs_path(d, name, path, sizeof (path));
- if (rc) {
- return rc;
- }
fd = open(path, O_RDONLY);
if (fd == -1) {
- XEN_HOST_PCI_LOG("Error: Can't open %s: %s\n", path, strerror(errno));
- return -errno;
+ error_setg_file_open(errp, errno, path);
+ return;
}
+
do {
- rc = read(fd, &buf, sizeof (buf) - 1);
+ rc = read(fd, &buf, sizeof(buf) - 1);
if (rc < 0 && errno != EINTR) {
- rc = -errno;
+ error_setg_errno(errp, errno, "read err");
goto out;
}
} while (rc < 0);
+
buf[rc] = 0;
- value = strtol(buf, &endptr, base);
- if (endptr == buf || *endptr != '\n') {
- rc = -1;
- } else if ((value == LONG_MIN || value == LONG_MAX) && errno == ERANGE) {
- rc = -errno;
- } else {
- rc = 0;
+ rc = qemu_strtoul(buf, &endptr, base, &value);
+ if (!rc) {
+ assert(value <= UINT_MAX);
*pvalue = value;
+ } else {
+ error_setg_errno(errp, -rc, "failed to parse value '%s'", buf);
}
+
out:
close(fd);
- return rc;
}
-static inline int xen_host_pci_get_hex_value(XenHostPCIDevice *d,
- const char *name,
- unsigned int *pvalue)
+static inline void xen_host_pci_get_hex_value(XenHostPCIDevice *d,
+ const char *name,
+ unsigned int *pvalue,
+ Error **errp)
{
- return xen_host_pci_get_value(d, name, pvalue, 16);
+ xen_host_pci_get_value(d, name, pvalue, 16, errp);
}
-static inline int xen_host_pci_get_dec_value(XenHostPCIDevice *d,
- const char *name,
- unsigned int *pvalue)
+static inline void xen_host_pci_get_dec_value(XenHostPCIDevice *d,
+ const char *name,
+ unsigned int *pvalue,
+ Error **errp)
{
- return xen_host_pci_get_value(d, name, pvalue, 10);
+ xen_host_pci_get_value(d, name, pvalue, 10, errp);
}
static bool xen_host_pci_dev_is_virtfn(XenHostPCIDevice *d)
char path[PATH_MAX];
struct stat buf;
- if (xen_host_pci_sysfs_path(d, "physfn", path, sizeof (path))) {
- return false;
- }
+ xen_host_pci_sysfs_path(d, "physfn", path, sizeof(path));
+
return !stat(path, &buf);
}
-static int xen_host_pci_config_open(XenHostPCIDevice *d)
+static void xen_host_pci_config_open(XenHostPCIDevice *d, Error **errp)
{
char path[PATH_MAX];
- int rc;
- rc = xen_host_pci_sysfs_path(d, "config", path, sizeof (path));
- if (rc) {
- return rc;
- }
+ xen_host_pci_sysfs_path(d, "config", path, sizeof(path));
+
d->config_fd = open(path, O_RDWR);
- if (d->config_fd < 0) {
- return -errno;
+ if (d->config_fd == -1) {
+ error_setg_file_open(errp, errno, path);
}
- return 0;
}
static int xen_host_pci_config_read(XenHostPCIDevice *d,
return -1;
}
-int xen_host_pci_device_get(XenHostPCIDevice *d, uint16_t domain,
- uint8_t bus, uint8_t dev, uint8_t func)
+void xen_host_pci_device_get(XenHostPCIDevice *d, uint16_t domain,
+ uint8_t bus, uint8_t dev, uint8_t func,
+ Error **errp)
{
unsigned int v;
- int rc = 0;
+ Error *err = NULL;
d->config_fd = -1;
d->domain = domain;
d->dev = dev;
d->func = func;
- rc = xen_host_pci_config_open(d);
- if (rc) {
+ xen_host_pci_config_open(d, &err);
+ if (err) {
goto error;
}
- rc = xen_host_pci_get_resource(d);
- if (rc) {
+
+ xen_host_pci_get_resource(d, &err);
+ if (err) {
goto error;
}
- rc = xen_host_pci_get_hex_value(d, "vendor", &v);
- if (rc) {
+
+ xen_host_pci_get_hex_value(d, "vendor", &v, &err);
+ if (err) {
goto error;
}
d->vendor_id = v;
- rc = xen_host_pci_get_hex_value(d, "device", &v);
- if (rc) {
+
+ xen_host_pci_get_hex_value(d, "device", &v, &err);
+ if (err) {
goto error;
}
d->device_id = v;
- rc = xen_host_pci_get_dec_value(d, "irq", &v);
- if (rc) {
+
+ xen_host_pci_get_dec_value(d, "irq", &v, &err);
+ if (err) {
goto error;
}
d->irq = v;
+
+ xen_host_pci_get_hex_value(d, "class", &v, &err);
+ if (err) {
+ goto error;
+ }
+ d->class_code = v;
+
d->is_virtfn = xen_host_pci_dev_is_virtfn(d);
- return 0;
+ return;
+
error:
+ error_propagate(errp, err);
+
if (d->config_fd >= 0) {
close(d->config_fd);
d->config_fd = -1;
}
- return rc;
+}
+
+bool xen_host_pci_device_closed(XenHostPCIDevice *d)
+{
+ return d->config_fd == -1;
}
void xen_host_pci_device_put(XenHostPCIDevice *d)
Code Review / kvmfornfv.git / blobdiff