#define DRM_MAJOR 226 /* Linux */
#endif
+#ifdef __OpenBSD__
+struct drm_pciinfo {
+ uint16_t domain;
+ uint8_t bus;
+ uint8_t dev;
+ uint8_t func;
+ uint16_t vendor_id;
+ uint16_t device_id;
+ uint16_t subvendor_id;
+ uint16_t subdevice_id;
+ uint8_t revision_id;
+};
+
+#define DRM_IOCTL_GET_PCIINFO DRM_IOR(0x15, struct drm_pciinfo)
+#endif
+
#define DRM_MSG_VERBOSITY 3
#define memclear(s) memset(&s, 0, sizeof(s))
if (drmIoctl(fd, DRM_IOCTL_GET_UNIQUE, &u))
return NULL;
u.unique = drmMalloc(u.unique_len + 1);
- if (drmIoctl(fd, DRM_IOCTL_GET_UNIQUE, &u))
+ if (drmIoctl(fd, DRM_IOCTL_GET_UNIQUE, &u)) {
+ drmFree(u.unique);
return NULL;
+ }
u.unique[u.unique_len] = '\0';
return u.unique;
if (!(list = drmMalloc(res.count * sizeof(*list))))
return NULL;
- if (!(retval = drmMalloc(res.count * sizeof(*retval)))) {
- drmFree(list);
- return NULL;
- }
+ if (!(retval = drmMalloc(res.count * sizeof(*retval))))
+ goto err_free_list;
res.contexts = list;
if (drmIoctl(fd, DRM_IOCTL_RES_CTX, &res))
- return NULL;
+ goto err_free_context;
for (i = 0; i < res.count; i++)
retval[i] = list[i].handle;
*count = res.count;
return retval;
+
+err_free_list:
+ drmFree(list);
+err_free_context:
+ drmFree(retval);
+ return NULL;
}
void drmFreeReservedContextList(drm_context_t *pt)
out_close_dir:
closedir(sysdir);
#else
-#warning "Missing implementation of drmGetMinorNameForFD"
+ struct stat sbuf;
+ char buf[PATH_MAX + 1];
+ const char *dev_name;
+ unsigned int maj, min;
+ int n, base;
+
+ if (fstat(fd, &sbuf))
+ return NULL;
+
+ maj = major(sbuf.st_rdev);
+ min = minor(sbuf.st_rdev);
+
+ if (maj != DRM_MAJOR || !S_ISCHR(sbuf.st_mode))
+ return NULL;
+
+ switch (type) {
+ case DRM_NODE_PRIMARY:
+ dev_name = DRM_DEV_NAME;
+ break;
+ case DRM_NODE_CONTROL:
+ dev_name = DRM_CONTROL_DEV_NAME;
+ break;
+ case DRM_NODE_RENDER:
+ dev_name = DRM_RENDER_DEV_NAME;
+ break;
+ default:
+ return NULL;
+ };
+
+ base = drmGetMinorBase(type);
+ if (base < 0)
+ return NULL;
+
+ n = snprintf(buf, sizeof(buf), dev_name, DRM_DIR_NAME, min - base);
+ if (n == -1 || n >= sizeof(buf))
+ return NULL;
+
+ return strdup(buf);
#endif
return NULL;
}
return drmGetMinorNameForFD(fd, DRM_NODE_RENDER);
}
+#ifdef __linux__
+static char * DRM_PRINTFLIKE(2, 3)
+sysfs_uevent_get(const char *path, const char *fmt, ...)
+{
+ char filename[PATH_MAX + 1], *key, *line = NULL, *value = NULL;
+ size_t size = 0, len;
+ ssize_t num;
+ va_list ap;
+ FILE *fp;
+
+ va_start(ap, fmt);
+ num = vasprintf(&key, fmt, ap);
+ va_end(ap);
+ len = num;
+
+ snprintf(filename, sizeof(filename), "%s/uevent", path);
+
+ fp = fopen(filename, "r");
+ if (!fp) {
+ free(key);
+ return NULL;
+ }
+
+ while ((num = getline(&line, &size, fp)) >= 0) {
+ if ((strncmp(line, key, len) == 0) && (line[len] == '=')) {
+ char *start = line + len + 1, *end = line + num - 1;
+
+ if (*end != '\n')
+ end++;
+
+ value = strndup(start, end - start);
+ break;
+ }
+ }
+
+ free(line);
+ fclose(fp);
+
+ free(key);
+
+ return value;
+}
+#endif
+
static int drmParseSubsystemType(int maj, int min)
{
#ifdef __linux__
if (strncmp(name, "/pci", 4) == 0)
return DRM_BUS_PCI;
+ if (strncmp(name, "/usb", 4) == 0)
+ return DRM_BUS_USB;
+
+ if (strncmp(name, "/platform", 9) == 0)
+ return DRM_BUS_PLATFORM;
+
+ if (strncmp(name, "/host1x", 7) == 0)
+ return DRM_BUS_HOST1X;
+
return -EINVAL;
+#elif defined(__OpenBSD__)
+ return DRM_BUS_PCI;
#else
#warning "Missing implementation of drmParseSubsystemType"
return -EINVAL;
static int drmParsePciBusInfo(int maj, int min, drmPciBusInfoPtr info)
{
#ifdef __linux__
- char path[PATH_MAX + 1];
- char data[128 + 1];
- char *str;
- int domain, bus, dev, func;
- int fd, ret;
+ unsigned int domain, bus, dev, func;
+ char path[PATH_MAX + 1], *value;
+ int num;
- snprintf(path, PATH_MAX, "/sys/dev/char/%d:%d/device/uevent", maj, min);
- fd = open(path, O_RDONLY);
- if (fd < 0)
- return -errno;
+ snprintf(path, sizeof(path), "/sys/dev/char/%d:%d/device", maj, min);
- ret = read(fd, data, sizeof(data));
- data[128] = '\0';
- close(fd);
- if (ret < 0)
- return -errno;
+ value = sysfs_uevent_get(path, "PCI_SLOT_NAME");
+ if (!value)
+ return -ENOENT;
-#define TAG "PCI_SLOT_NAME="
- str = strstr(data, TAG);
- if (str == NULL)
- return -EINVAL;
+ num = sscanf(value, "%04x:%02x:%02x.%1u", &domain, &bus, &dev, &func);
+ free(value);
- if (sscanf(str, TAG "%04x:%02x:%02x.%1u",
- &domain, &bus, &dev, &func) != 4)
+ if (num != 4)
return -EINVAL;
-#undef TAG
info->domain = domain;
info->bus = bus;
info->func = func;
return 0;
+#elif defined(__OpenBSD__)
+ struct drm_pciinfo pinfo;
+ int fd, type;
+
+ type = drmGetMinorType(min);
+ if (type == -1)
+ return -ENODEV;
+
+ fd = drmOpenMinor(min, 0, type);
+ if (fd < 0)
+ return -errno;
+
+ if (drmIoctl(fd, DRM_IOCTL_GET_PCIINFO, &pinfo)) {
+ close(fd);
+ return -errno;
+ }
+ close(fd);
+
+ info->domain = pinfo.domain;
+ info->bus = pinfo.bus;
+ info->dev = pinfo.dev;
+ info->func = pinfo.func;
+
+ return 0;
#else
#warning "Missing implementation of drmParsePciBusInfo"
return -EINVAL;
#endif
}
-static int drmCompareBusInfo(drmDevicePtr a, drmDevicePtr b)
+int drmDevicesEqual(drmDevicePtr a, drmDevicePtr b)
{
if (a == NULL || b == NULL)
- return -1;
+ return 0;
if (a->bustype != b->bustype)
- return -1;
+ return 0;
switch (a->bustype) {
case DRM_BUS_PCI:
- return memcmp(a->businfo.pci, b->businfo.pci, sizeof(drmPciBusInfo));
+ return memcmp(a->businfo.pci, b->businfo.pci, sizeof(drmPciBusInfo)) == 0;
+
+ case DRM_BUS_USB:
+ return memcmp(a->businfo.usb, b->businfo.usb, sizeof(drmUsbBusInfo)) == 0;
+
+ case DRM_BUS_PLATFORM:
+ return memcmp(a->businfo.platform, b->businfo.platform, sizeof(drmPlatformBusInfo)) == 0;
+
+ case DRM_BUS_HOST1X:
+ return memcmp(a->businfo.host1x, b->businfo.host1x, sizeof(drmHost1xBusInfo)) == 0;
+
default:
break;
}
- return -1;
+ return 0;
}
static int drmGetNodeType(const char *name)
3 /* length of the node number */;
}
-static int drmParsePciDeviceInfo(const char *d_name,
- drmPciDeviceInfoPtr device)
-{
#ifdef __linux__
+static int parse_separate_sysfs_files(int maj, int min,
+ drmPciDeviceInfoPtr device,
+ bool ignore_revision)
+{
+#define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
+ static const char *attrs[] = {
+ "revision", /* Older kernels are missing the file, so check for it first */
+ "vendor",
+ "device",
+ "subsystem_vendor",
+ "subsystem_device",
+ };
+ char path[PATH_MAX + 1];
+ unsigned int data[ARRAY_SIZE(attrs)];
+ FILE *fp;
+ int ret;
+
+ for (unsigned i = ignore_revision ? 1 : 0; i < ARRAY_SIZE(attrs); i++) {
+ snprintf(path, PATH_MAX, "/sys/dev/char/%d:%d/device/%s", maj, min,
+ attrs[i]);
+ fp = fopen(path, "r");
+ if (!fp)
+ return -errno;
+
+ ret = fscanf(fp, "%x", &data[i]);
+ fclose(fp);
+ if (ret != 1)
+ return -errno;
+
+ }
+
+ device->revision_id = ignore_revision ? 0xff : data[0] & 0xff;
+ device->vendor_id = data[1] & 0xffff;
+ device->device_id = data[2] & 0xffff;
+ device->subvendor_id = data[3] & 0xffff;
+ device->subdevice_id = data[4] & 0xffff;
+
+ return 0;
+}
+
+static int parse_config_sysfs_file(int maj, int min,
+ drmPciDeviceInfoPtr device)
+{
char path[PATH_MAX + 1];
unsigned char config[64];
int fd, ret;
- snprintf(path, PATH_MAX, "/sys/class/drm/%s/device/config", d_name);
+ snprintf(path, PATH_MAX, "/sys/dev/char/%d:%d/device/config", maj, min);
fd = open(path, O_RDONLY);
if (fd < 0)
return -errno;
device->subdevice_id = config[46] | (config[47] << 8);
return 0;
+}
+#endif
+
+static int drmParsePciDeviceInfo(int maj, int min,
+ drmPciDeviceInfoPtr device,
+ uint32_t flags)
+{
+#ifdef __linux__
+ if (!(flags & DRM_DEVICE_GET_PCI_REVISION))
+ return parse_separate_sysfs_files(maj, min, device, true);
+
+ if (parse_separate_sysfs_files(maj, min, device, false))
+ return parse_config_sysfs_file(maj, min, device);
+
+ return 0;
+#elif defined(__OpenBSD__)
+ struct drm_pciinfo pinfo;
+ int fd, type;
+
+ type = drmGetMinorType(min);
+ if (type == -1)
+ return -ENODEV;
+
+ fd = drmOpenMinor(min, 0, type);
+ if (fd < 0)
+ return -errno;
+
+ if (drmIoctl(fd, DRM_IOCTL_GET_PCIINFO, &pinfo)) {
+ close(fd);
+ return -errno;
+ }
+ close(fd);
+
+ device->vendor_id = pinfo.vendor_id;
+ device->device_id = pinfo.device_id;
+ device->revision_id = pinfo.revision_id;
+ device->subvendor_id = pinfo.subvendor_id;
+ device->subdevice_id = pinfo.subdevice_id;
+
+ return 0;
#else
#warning "Missing implementation of drmParsePciDeviceInfo"
return -EINVAL;
#endif
}
+static void drmFreePlatformDevice(drmDevicePtr device)
+{
+ if (device->deviceinfo.platform) {
+ if (device->deviceinfo.platform->compatible) {
+ char **compatible = device->deviceinfo.platform->compatible;
+
+ while (*compatible) {
+ free(*compatible);
+ compatible++;
+ }
+
+ free(device->deviceinfo.platform->compatible);
+ }
+ }
+}
+
+static void drmFreeHost1xDevice(drmDevicePtr device)
+{
+ if (device->deviceinfo.host1x) {
+ if (device->deviceinfo.host1x->compatible) {
+ char **compatible = device->deviceinfo.host1x->compatible;
+
+ while (*compatible) {
+ free(*compatible);
+ compatible++;
+ }
+
+ free(device->deviceinfo.host1x->compatible);
+ }
+ }
+}
+
void drmFreeDevice(drmDevicePtr *device)
{
if (device == NULL)
return;
+ if (*device) {
+ switch ((*device)->bustype) {
+ case DRM_BUS_PLATFORM:
+ drmFreePlatformDevice(*device);
+ break;
+
+ case DRM_BUS_HOST1X:
+ drmFreeHost1xDevice(*device);
+ break;
+ }
+ }
+
free(*device);
*device = NULL;
}
if (devices == NULL)
return;
- for (i = 0; i < count && devices[i] != NULL; i++)
- drmFreeDevice(&devices[i]);
+ for (i = 0; i < count; i++)
+ if (devices[i])
+ drmFreeDevice(&devices[i]);
}
-static int drmProcessPciDevice(drmDevicePtr *device, const char *d_name,
- const char *node, int node_type,
- int maj, int min, bool fetch_deviceinfo)
+static drmDevicePtr drmDeviceAlloc(unsigned int type, const char *node,
+ size_t bus_size, size_t device_size,
+ char **ptrp)
{
- const int max_node_str = ALIGN(drmGetMaxNodeName(), sizeof(void *));
- int ret, i;
- char *addr;
+ size_t max_node_length, extra, size;
+ drmDevicePtr device;
+ unsigned int i;
+ char *ptr;
- *device = calloc(1, sizeof(drmDevice) +
- (DRM_NODE_MAX * (sizeof(void *) + max_node_str)) +
- sizeof(drmPciBusInfo) +
- sizeof(drmPciDeviceInfo));
- if (!*device)
- return -ENOMEM;
+ max_node_length = ALIGN(drmGetMaxNodeName(), sizeof(void *));
+ extra = DRM_NODE_MAX * (sizeof(void *) + max_node_length);
- addr = (char*)*device;
+ size = sizeof(*device) + extra + bus_size + device_size;
- (*device)->bustype = DRM_BUS_PCI;
- (*device)->available_nodes = 1 << node_type;
+ device = calloc(1, size);
+ if (!device)
+ return NULL;
+
+ device->available_nodes = 1 << type;
- addr += sizeof(drmDevice);
- (*device)->nodes = (char**)addr;
+ ptr = (char *)device + sizeof(*device);
+ device->nodes = (char **)ptr;
+
+ ptr += DRM_NODE_MAX * sizeof(void *);
- addr += DRM_NODE_MAX * sizeof(void *);
for (i = 0; i < DRM_NODE_MAX; i++) {
- (*device)->nodes[i] = addr;
- addr += max_node_str;
+ device->nodes[i] = ptr;
+ ptr += max_node_length;
}
- memcpy((*device)->nodes[node_type], node, max_node_str);
- (*device)->businfo.pci = (drmPciBusInfoPtr)addr;
+ memcpy(device->nodes[type], node, max_node_length);
+
+ *ptrp = ptr;
+
+ return device;
+}
+
+static int drmProcessPciDevice(drmDevicePtr *device,
+ const char *node, int node_type,
+ int maj, int min, bool fetch_deviceinfo,
+ uint32_t flags)
+{
+ drmDevicePtr dev;
+ char *addr;
+ int ret;
+
+ dev = drmDeviceAlloc(node_type, node, sizeof(drmPciBusInfo),
+ sizeof(drmPciDeviceInfo), &addr);
+ if (!dev)
+ return -ENOMEM;
+
+ dev->bustype = DRM_BUS_PCI;
- ret = drmParsePciBusInfo(maj, min, (*device)->businfo.pci);
+ dev->businfo.pci = (drmPciBusInfoPtr)addr;
+
+ ret = drmParsePciBusInfo(maj, min, dev->businfo.pci);
if (ret)
goto free_device;
// Fetch the device info if the user has requested it
if (fetch_deviceinfo) {
addr += sizeof(drmPciBusInfo);
- (*device)->deviceinfo.pci = (drmPciDeviceInfoPtr)addr;
+ dev->deviceinfo.pci = (drmPciDeviceInfoPtr)addr;
- ret = drmParsePciDeviceInfo(d_name, (*device)->deviceinfo.pci);
+ ret = drmParsePciDeviceInfo(maj, min, dev->deviceinfo.pci, flags);
if (ret)
goto free_device;
}
+
+ *device = dev;
+
return 0;
free_device:
- free(*device);
- *device = NULL;
+ free(dev);
return ret;
}
-/* Consider devices located on the same bus as duplicate and fold the respective
- * entries into a single one.
- *
- * Note: this leaves "gaps" in the array, while preserving the length.
- */
-static void drmFoldDuplicatedDevices(drmDevicePtr local_devices[], int count)
+static int drmParseUsbBusInfo(int maj, int min, drmUsbBusInfoPtr info)
{
- int node_type, i, j;
+#ifdef __linux__
+ char path[PATH_MAX + 1], *value;
+ unsigned int bus, dev;
+ int ret;
- for (i = 0; i < count; i++) {
- for (j = i + 1; j < count; j++) {
- if (drmCompareBusInfo(local_devices[i], local_devices[j]) == 0) {
- local_devices[i]->available_nodes |= local_devices[j]->available_nodes;
- node_type = log2(local_devices[j]->available_nodes);
- memcpy(local_devices[i]->nodes[node_type],
- local_devices[j]->nodes[node_type], drmGetMaxNodeName());
- drmFreeDevice(&local_devices[j]);
- }
- }
- }
-}
+ snprintf(path, sizeof(path), "/sys/dev/char/%d:%d/device", maj, min);
-/**
- * Get information about the opened drm device
- *
- * \param fd file descriptor of the drm device
- * \param device the address of a drmDevicePtr where the information
- * will be allocated in stored
- *
- * \return zero on success, negative error code otherwise.
- */
-int drmGetDevice(int fd, drmDevicePtr *device)
-{
- drmDevicePtr *local_devices;
- drmDevicePtr d;
- DIR *sysdir;
- struct dirent *dent;
- struct stat sbuf;
- char node[PATH_MAX + 1];
- int node_type, subsystem_type;
- int maj, min;
- int ret, i, node_count;
- int max_count = 16;
- dev_t find_rdev;
+ value = sysfs_uevent_get(path, "BUSNUM");
+ if (!value)
+ return -ENOENT;
- if (fd == -1 || device == NULL)
- return -EINVAL;
+ ret = sscanf(value, "%03u", &bus);
+ free(value);
- if (fstat(fd, &sbuf))
+ if (ret <= 0)
return -errno;
- find_rdev = sbuf.st_rdev;
- maj = major(sbuf.st_rdev);
- min = minor(sbuf.st_rdev);
+ value = sysfs_uevent_get(path, "DEVNUM");
+ if (!value)
+ return -ENOENT;
- if (maj != DRM_MAJOR || !S_ISCHR(sbuf.st_mode))
- return -EINVAL;
+ ret = sscanf(value, "%03u", &dev);
+ free(value);
- subsystem_type = drmParseSubsystemType(maj, min);
+ if (ret <= 0)
+ return -errno;
- local_devices = calloc(max_count, sizeof(drmDevicePtr));
- if (local_devices == NULL)
- return -ENOMEM;
+ info->bus = bus;
+ info->dev = dev;
- sysdir = opendir(DRM_DIR_NAME);
- if (!sysdir) {
- ret = -errno;
- goto free_locals;
- }
+ return 0;
+#else
+#warning "Missing implementation of drmParseUsbBusInfo"
+ return -EINVAL;
+#endif
+}
- i = 0;
- while ((dent = readdir(sysdir))) {
- node_type = drmGetNodeType(dent->d_name);
- if (node_type < 0)
- continue;
+static int drmParseUsbDeviceInfo(int maj, int min, drmUsbDeviceInfoPtr info)
+{
+#ifdef __linux__
+ char path[PATH_MAX + 1], *value;
+ unsigned int vendor, product;
+ int ret;
- snprintf(node, PATH_MAX, "%s/%s", DRM_DIR_NAME, dent->d_name);
- if (stat(node, &sbuf))
+ snprintf(path, sizeof(path), "/sys/dev/char/%d:%d/device", maj, min);
+
+ value = sysfs_uevent_get(path, "PRODUCT");
+ if (!value)
+ return -ENOENT;
+
+ ret = sscanf(value, "%x/%x", &vendor, &product);
+ free(value);
+
+ if (ret <= 0)
+ return -errno;
+
+ info->vendor = vendor;
+ info->product = product;
+
+ return 0;
+#else
+#warning "Missing implementation of drmParseUsbDeviceInfo"
+ return -EINVAL;
+#endif
+}
+
+static int drmProcessUsbDevice(drmDevicePtr *device, const char *node,
+ int node_type, int maj, int min,
+ bool fetch_deviceinfo, uint32_t flags)
+{
+ drmDevicePtr dev;
+ char *ptr;
+ int ret;
+
+ dev = drmDeviceAlloc(node_type, node, sizeof(drmUsbBusInfo),
+ sizeof(drmUsbDeviceInfo), &ptr);
+ if (!dev)
+ return -ENOMEM;
+
+ dev->bustype = DRM_BUS_USB;
+
+ dev->businfo.usb = (drmUsbBusInfoPtr)ptr;
+
+ ret = drmParseUsbBusInfo(maj, min, dev->businfo.usb);
+ if (ret < 0)
+ goto free_device;
+
+ if (fetch_deviceinfo) {
+ ptr += sizeof(drmUsbBusInfo);
+ dev->deviceinfo.usb = (drmUsbDeviceInfoPtr)ptr;
+
+ ret = drmParseUsbDeviceInfo(maj, min, dev->deviceinfo.usb);
+ if (ret < 0)
+ goto free_device;
+ }
+
+ *device = dev;
+
+ return 0;
+
+free_device:
+ free(dev);
+ return ret;
+}
+
+static int drmParsePlatformBusInfo(int maj, int min, drmPlatformBusInfoPtr info)
+{
+#ifdef __linux__
+ char path[PATH_MAX + 1], *name;
+
+ snprintf(path, sizeof(path), "/sys/dev/char/%d:%d/device", maj, min);
+
+ name = sysfs_uevent_get(path, "OF_FULLNAME");
+ if (!name)
+ return -ENOENT;
+
+ strncpy(info->fullname, name, DRM_PLATFORM_DEVICE_NAME_LEN);
+ info->fullname[DRM_PLATFORM_DEVICE_NAME_LEN - 1] = '\0';
+ free(name);
+
+ return 0;
+#else
+#warning "Missing implementation of drmParsePlatformBusInfo"
+ return -EINVAL;
+#endif
+}
+
+static int drmParsePlatformDeviceInfo(int maj, int min,
+ drmPlatformDeviceInfoPtr info)
+{
+#ifdef __linux__
+ char path[PATH_MAX + 1], *value;
+ unsigned int count, i;
+ int err;
+
+ snprintf(path, sizeof(path), "/sys/dev/char/%d:%d/device", maj, min);
+
+ value = sysfs_uevent_get(path, "OF_COMPATIBLE_N");
+ if (!value)
+ return -ENOENT;
+
+ sscanf(value, "%u", &count);
+ free(value);
+
+ info->compatible = calloc(count + 1, sizeof(*info->compatible));
+ if (!info->compatible)
+ return -ENOMEM;
+
+ for (i = 0; i < count; i++) {
+ value = sysfs_uevent_get(path, "OF_COMPATIBLE_%u", i);
+ if (!value) {
+ err = -ENOENT;
+ goto free;
+ }
+
+ info->compatible[i] = value;
+ }
+
+ return 0;
+
+free:
+ while (i--)
+ free(info->compatible[i]);
+
+ free(info->compatible);
+ return err;
+#else
+#warning "Missing implementation of drmParsePlatformDeviceInfo"
+ return -EINVAL;
+#endif
+}
+
+static int drmProcessPlatformDevice(drmDevicePtr *device,
+ const char *node, int node_type,
+ int maj, int min, bool fetch_deviceinfo,
+ uint32_t flags)
+{
+ drmDevicePtr dev;
+ char *ptr;
+ int ret;
+
+ dev = drmDeviceAlloc(node_type, node, sizeof(drmPlatformBusInfo),
+ sizeof(drmPlatformDeviceInfo), &ptr);
+ if (!dev)
+ return -ENOMEM;
+
+ dev->bustype = DRM_BUS_PLATFORM;
+
+ dev->businfo.platform = (drmPlatformBusInfoPtr)ptr;
+
+ ret = drmParsePlatformBusInfo(maj, min, dev->businfo.platform);
+ if (ret < 0)
+ goto free_device;
+
+ if (fetch_deviceinfo) {
+ ptr += sizeof(drmPlatformBusInfo);
+ dev->deviceinfo.platform = (drmPlatformDeviceInfoPtr)ptr;
+
+ ret = drmParsePlatformDeviceInfo(maj, min, dev->deviceinfo.platform);
+ if (ret < 0)
+ goto free_device;
+ }
+
+ *device = dev;
+
+ return 0;
+
+free_device:
+ free(dev);
+ return ret;
+}
+
+static int drmParseHost1xBusInfo(int maj, int min, drmHost1xBusInfoPtr info)
+{
+#ifdef __linux__
+ char path[PATH_MAX + 1], *name;
+
+ snprintf(path, sizeof(path), "/sys/dev/char/%d:%d/device", maj, min);
+
+ name = sysfs_uevent_get(path, "OF_FULLNAME");
+ if (!name)
+ return -ENOENT;
+
+ strncpy(info->fullname, name, DRM_HOST1X_DEVICE_NAME_LEN);
+ info->fullname[DRM_HOST1X_DEVICE_NAME_LEN - 1] = '\0';
+ free(name);
+
+ return 0;
+#else
+#warning "Missing implementation of drmParseHost1xBusInfo"
+ return -EINVAL;
+#endif
+}
+
+static int drmParseHost1xDeviceInfo(int maj, int min,
+ drmHost1xDeviceInfoPtr info)
+{
+#ifdef __linux__
+ char path[PATH_MAX + 1], *value;
+ unsigned int count, i;
+ int err;
+
+ snprintf(path, sizeof(path), "/sys/dev/char/%d:%d/device", maj, min);
+
+ value = sysfs_uevent_get(path, "OF_COMPATIBLE_N");
+ if (!value)
+ return -ENOENT;
+
+ sscanf(value, "%u", &count);
+ free(value);
+
+ info->compatible = calloc(count + 1, sizeof(*info->compatible));
+ if (!info->compatible)
+ return -ENOMEM;
+
+ for (i = 0; i < count; i++) {
+ value = sysfs_uevent_get(path, "OF_COMPATIBLE_%u", i);
+ if (!value) {
+ err = -ENOENT;
+ goto free;
+ }
+
+ info->compatible[i] = value;
+ }
+
+ return 0;
+
+free:
+ while (i--)
+ free(info->compatible[i]);
+
+ free(info->compatible);
+ return err;
+#else
+#warning "Missing implementation of drmParseHost1xDeviceInfo"
+ return -EINVAL;
+#endif
+}
+
+static int drmProcessHost1xDevice(drmDevicePtr *device,
+ const char *node, int node_type,
+ int maj, int min, bool fetch_deviceinfo,
+ uint32_t flags)
+{
+ drmDevicePtr dev;
+ char *ptr;
+ int ret;
+
+ dev = drmDeviceAlloc(node_type, node, sizeof(drmHost1xBusInfo),
+ sizeof(drmHost1xDeviceInfo), &ptr);
+ if (!dev)
+ return -ENOMEM;
+
+ dev->bustype = DRM_BUS_HOST1X;
+
+ dev->businfo.host1x = (drmHost1xBusInfoPtr)ptr;
+
+ ret = drmParseHost1xBusInfo(maj, min, dev->businfo.host1x);
+ if (ret < 0)
+ goto free_device;
+
+ if (fetch_deviceinfo) {
+ ptr += sizeof(drmHost1xBusInfo);
+ dev->deviceinfo.host1x = (drmHost1xDeviceInfoPtr)ptr;
+
+ ret = drmParseHost1xDeviceInfo(maj, min, dev->deviceinfo.host1x);
+ if (ret < 0)
+ goto free_device;
+ }
+
+ *device = dev;
+
+ return 0;
+
+free_device:
+ free(dev);
+ return ret;
+}
+
+/* Consider devices located on the same bus as duplicate and fold the respective
+ * entries into a single one.
+ *
+ * Note: this leaves "gaps" in the array, while preserving the length.
+ */
+static void drmFoldDuplicatedDevices(drmDevicePtr local_devices[], int count)
+{
+ int node_type, i, j;
+
+ for (i = 0; i < count; i++) {
+ for (j = i + 1; j < count; j++) {
+ if (drmCompareDevices(local_devices[i], local_devices[j])) {
+ local_devices[i]->available_nodes |= local_devices[j]->available_nodes;
+ node_type = log2(local_devices[j]->available_nodes);
+ memcpy(local_devices[i]->nodes[node_type],
+ local_devices[j]->nodes[node_type], drmGetMaxNodeName());
+ drmFreeDevice(&local_devices[j]);
+ }
+ }
+ }
+}
+
+/* Check that the given flags are valid returning 0 on success */
+static int
+drm_device_validate_flags(uint32_t flags)
+{
+ return (flags & ~DRM_DEVICE_GET_PCI_REVISION);
+}
+
+/**
+ * Get information about the opened drm device
+ *
+ * \param fd file descriptor of the drm device
+ * \param flags feature/behaviour bitmask
+ * \param device the address of a drmDevicePtr where the information
+ * will be allocated in stored
+ *
+ * \return zero on success, negative error code otherwise.
+ *
+ * \note Unlike drmGetDevice it does not retrieve the pci device revision field
+ * unless the DRM_DEVICE_GET_PCI_REVISION \p flag is set.
+ */
+int drmGetDevice2(int fd, uint32_t flags, drmDevicePtr *device)
+{
+#ifdef __OpenBSD__
+ /*
+ * DRI device nodes on OpenBSD are not in their own directory, they reside
+ * in /dev along with a large number of statically generated /dev nodes.
+ * Avoid stat'ing all of /dev needlessly by implementing this custom path.
+ */
+ drmDevicePtr d;
+ struct stat sbuf;
+ char node[PATH_MAX + 1];
+ const char *dev_name;
+ int node_type, subsystem_type;
+ int maj, min, n, ret, base;
+
+ if (fd == -1 || device == NULL)
+ return -EINVAL;
+
+ if (fstat(fd, &sbuf))
+ return -errno;
+
+ maj = major(sbuf.st_rdev);
+ min = minor(sbuf.st_rdev);
+
+ if (maj != DRM_MAJOR || !S_ISCHR(sbuf.st_mode))
+ return -EINVAL;
+
+ node_type = drmGetMinorType(min);
+ if (node_type == -1)
+ return -ENODEV;
+
+ switch (node_type) {
+ case DRM_NODE_PRIMARY:
+ dev_name = DRM_DEV_NAME;
+ break;
+ case DRM_NODE_CONTROL:
+ dev_name = DRM_CONTROL_DEV_NAME;
+ break;
+ case DRM_NODE_RENDER:
+ dev_name = DRM_RENDER_DEV_NAME;
+ break;
+ default:
+ return -EINVAL;
+ };
+
+ base = drmGetMinorBase(node_type);
+ if (base < 0)
+ return -EINVAL;
+
+ n = snprintf(node, PATH_MAX, dev_name, DRM_DIR_NAME, min - base);
+ if (n == -1 || n >= PATH_MAX)
+ return -errno;
+ if (stat(node, &sbuf))
+ return -EINVAL;
+
+ subsystem_type = drmParseSubsystemType(maj, min);
+ if (subsystem_type != DRM_BUS_PCI)
+ return -ENODEV;
+
+ ret = drmProcessPciDevice(&d, node, node_type, maj, min, true, flags);
+ if (ret)
+ return ret;
+
+ *device = d;
+
+ return 0;
+#else
+ drmDevicePtr *local_devices;
+ drmDevicePtr d;
+ DIR *sysdir;
+ struct dirent *dent;
+ struct stat sbuf;
+ char node[PATH_MAX + 1];
+ int node_type, subsystem_type;
+ int maj, min;
+ int ret, i, node_count;
+ int max_count = 16;
+ dev_t find_rdev;
+
+ if (drm_device_validate_flags(flags))
+ return -EINVAL;
+
+ if (fd == -1 || device == NULL)
+ return -EINVAL;
+
+ if (fstat(fd, &sbuf))
+ return -errno;
+
+ find_rdev = sbuf.st_rdev;
+ maj = major(sbuf.st_rdev);
+ min = minor(sbuf.st_rdev);
+
+ if (maj != DRM_MAJOR || !S_ISCHR(sbuf.st_mode))
+ return -EINVAL;
+
+ subsystem_type = drmParseSubsystemType(maj, min);
+
+ local_devices = calloc(max_count, sizeof(drmDevicePtr));
+ if (local_devices == NULL)
+ return -ENOMEM;
+
+ sysdir = opendir(DRM_DIR_NAME);
+ if (!sysdir) {
+ ret = -errno;
+ goto free_locals;
+ }
+
+ i = 0;
+ while ((dent = readdir(sysdir))) {
+ node_type = drmGetNodeType(dent->d_name);
+ if (node_type < 0)
+ continue;
+
+ snprintf(node, PATH_MAX, "%s/%s", DRM_DIR_NAME, dent->d_name);
+ if (stat(node, &sbuf))
continue;
maj = major(sbuf.st_rdev);
switch (subsystem_type) {
case DRM_BUS_PCI:
- ret = drmProcessPciDevice(&d, dent->d_name, node, node_type,
- maj, min, true);
+ ret = drmProcessPciDevice(&d, node, node_type, maj, min, true, flags);
if (ret)
- goto free_devices;
+ continue;
+
+ break;
+
+ case DRM_BUS_USB:
+ ret = drmProcessUsbDevice(&d, node, node_type, maj, min, true, flags);
+ if (ret)
+ continue;
+
+ break;
+
+ case DRM_BUS_PLATFORM:
+ ret = drmProcessPlatformDevice(&d, node, node_type, maj, min, true, flags);
+ if (ret)
+ continue;
+
+ break;
+
+ case DRM_BUS_HOST1X:
+ ret = drmProcessHost1xDevice(&d, node, node_type, maj, min, true, flags);
+ if (ret)
+ continue;
break;
+
default:
- fprintf(stderr, "The subsystem type is not supported yet\n");
continue;
}
closedir(sysdir);
free(local_devices);
+ if (*device == NULL)
+ return -ENODEV;
return 0;
free_devices:
free_locals:
free(local_devices);
return ret;
+#endif
+}
+
+/**
+ * Get information about the opened drm device
+ *
+ * \param fd file descriptor of the drm device
+ * \param device the address of a drmDevicePtr where the information
+ * will be allocated in stored
+ *
+ * \return zero on success, negative error code otherwise.
+ */
+int drmGetDevice(int fd, drmDevicePtr *device)
+{
+ return drmGetDevice2(fd, DRM_DEVICE_GET_PCI_REVISION, device);
}
/**
* Get drm devices on the system
*
+ * \param flags feature/behaviour bitmask
* \param devices the array of devices with drmDevicePtr elements
* can be NULL to get the device number first
* \param max_devices the maximum number of devices for the array
* if devices is NULL - total number of devices available on the system,
* alternatively the number of devices stored in devices[], which is
* capped by the max_devices.
+ *
+ * \note Unlike drmGetDevices it does not retrieve the pci device revision field
+ * unless the DRM_DEVICE_GET_PCI_REVISION \p flag is set.
*/
-int drmGetDevices(drmDevicePtr devices[], int max_devices)
+int drmGetDevices2(uint32_t flags, drmDevicePtr devices[], int max_devices)
{
drmDevicePtr *local_devices;
drmDevicePtr device;
int ret, i, node_count, device_count;
int max_count = 16;
+ if (drm_device_validate_flags(flags))
+ return -EINVAL;
+
local_devices = calloc(max_count, sizeof(drmDevicePtr));
if (local_devices == NULL)
return -ENOMEM;
switch (subsystem_type) {
case DRM_BUS_PCI:
- ret = drmProcessPciDevice(&device, dent->d_name, node, node_type,
- maj, min, devices != NULL);
+ ret = drmProcessPciDevice(&device, node, node_type,
+ maj, min, devices != NULL, flags);
+ if (ret)
+ continue;
+
+ break;
+
+ case DRM_BUS_USB:
+ ret = drmProcessUsbDevice(&device, node, node_type, maj, min,
+ devices != NULL, flags);
+ if (ret)
+ goto free_devices;
+
+ break;
+
+ case DRM_BUS_PLATFORM:
+ ret = drmProcessPlatformDevice(&device, node, node_type, maj, min,
+ devices != NULL, flags);
+ if (ret)
+ goto free_devices;
+
+ break;
+
+ case DRM_BUS_HOST1X:
+ ret = drmProcessHost1xDevice(&device, node, node_type, maj, min,
+ devices != NULL, flags);
if (ret)
goto free_devices;
break;
+
default:
- fprintf(stderr, "The subsystem type is not supported yet\n");
continue;
}
free(local_devices);
return ret;
}
+
+/**
+ * Get drm devices on the system
+ *
+ * \param devices the array of devices with drmDevicePtr elements
+ * can be NULL to get the device number first
+ * \param max_devices the maximum number of devices for the array
+ *
+ * \return on error - negative error code,
+ * if devices is NULL - total number of devices available on the system,
+ * alternatively the number of devices stored in devices[], which is
+ * capped by the max_devices.
+ */
+int drmGetDevices(drmDevicePtr devices[], int max_devices)
+{
+ return drmGetDevices2(DRM_DEVICE_GET_PCI_REVISION, devices, max_devices);
+}
+
+char *drmGetDeviceNameFromFd2(int fd)
+{
+#ifdef __linux__
+ struct stat sbuf;
+ char path[PATH_MAX + 1], *value;
+ unsigned int maj, min;
+
+ if (fstat(fd, &sbuf))
+ return NULL;
+
+ maj = major(sbuf.st_rdev);
+ min = minor(sbuf.st_rdev);
+
+ if (maj != DRM_MAJOR || !S_ISCHR(sbuf.st_mode))
+ return NULL;
+
+ snprintf(path, sizeof(path), "/sys/dev/char/%d:%d", maj, min);
+
+ value = sysfs_uevent_get(path, "DEVNAME");
+ if (!value)
+ return NULL;
+
+ snprintf(path, sizeof(path), "/dev/%s", value);
+ free(value);
+
+ return strdup(path);
+#else
+ struct stat sbuf;
+ char node[PATH_MAX + 1];
+ const char *dev_name;
+ int node_type;
+ int maj, min, n, base;
+
+ if (fstat(fd, &sbuf))
+ return NULL;
+
+ maj = major(sbuf.st_rdev);
+ min = minor(sbuf.st_rdev);
+
+ if (maj != DRM_MAJOR || !S_ISCHR(sbuf.st_mode))
+ return NULL;
+
+ node_type = drmGetMinorType(min);
+ if (node_type == -1)
+ return NULL;
+
+ switch (node_type) {
+ case DRM_NODE_PRIMARY:
+ dev_name = DRM_DEV_NAME;
+ break;
+ case DRM_NODE_CONTROL:
+ dev_name = DRM_CONTROL_DEV_NAME;
+ break;
+ case DRM_NODE_RENDER:
+ dev_name = DRM_RENDER_DEV_NAME;
+ break;
+ default:
+ return NULL;
+ };
+
+ base = drmGetMinorBase(node_type);
+ if (base < 0)
+ return NULL;
+
+ n = snprintf(node, PATH_MAX, dev_name, DRM_DIR_NAME, min - base);
+ if (n == -1 || n >= PATH_MAX)
+ return NULL;
+
+ return strdup(node);
+#endif
+}
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