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4e55f4fdbd44dee1442da5a496f38e5fcd7cc8d4
bsdports/system/libdrm/files/patch-xf86drm.c
ziggi 5cfdab6bfe create bsd12 branch
2019-12-26 07:26:06 +00:00

803 lines
24 KiB
C
Raw Blame History

--- xf86drm.c.orig 2017-04-07 08:49:13 UTC
+++ xf86drm.c
@@ -49,6 +49,9 @@
#include <signal.h>
#include <time.h>
#include <sys/types.h>
+#ifdef HAVE_SYS_SYSCTL_H
+#include <sys/sysctl.h>
+#endif
#include <sys/stat.h>
#define stat_t struct stat
#include <sys/ioctl.h>
@@ -62,6 +65,10 @@
#endif
#include <math.h>
+#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
+#include <sys/pciio.h>
+#endif
+
/* Not all systems have MAP_FAILED defined */
#ifndef MAP_FAILED
#define MAP_FAILED ((void *)-1)
@@ -72,18 +79,8 @@
#include "util_math.h"
-#ifdef __OpenBSD__
-#define DRM_PRIMARY_MINOR_NAME "drm"
-#define DRM_CONTROL_MINOR_NAME "drmC"
-#define DRM_RENDER_MINOR_NAME "drmR"
-#else
-#define DRM_PRIMARY_MINOR_NAME "card"
-#define DRM_CONTROL_MINOR_NAME "controlD"
-#define DRM_RENDER_MINOR_NAME "renderD"
-#endif
-
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
-#define DRM_MAJOR 145
+#define DRM_MAJOR 0 /* Major ID unused on systems with devfs */
#endif
#ifdef __NetBSD__
@@ -180,7 +177,7 @@ void drmFree(void *pt)
}
/**
- * Call ioctl, restarting if it is interupted
+ * Call ioctl, restarting if it is interrupted
*/
int
drmIoctl(int fd, unsigned long request, void *arg)
@@ -223,6 +220,89 @@ drmHashEntry *drmGetEntry(int fd)
return entry;
}
+static int drmGetMinorBase(int type)
+{
+ switch (type) {
+ case DRM_NODE_PRIMARY:
+ case DRM_NODE_CONTROL:
+ case DRM_NODE_RENDER:
+ return type << 6;
+ default:
+ return -1;
+ };
+}
+
+static int drmGetMinorType(int minor)
+{
+ if (minor < 0)
+ return -1;
+
+ int type = minor >> 6;
+ switch (type) {
+ case DRM_NODE_PRIMARY:
+ case DRM_NODE_CONTROL:
+ case DRM_NODE_RENDER:
+ return type;
+ default:
+ return -1;
+ }
+}
+
+#ifdef __linux__
+static const char *drmGetMinorName(int type)
+{
+ switch (type) {
+ case DRM_NODE_PRIMARY:
+ return DRM_PRIMARY_MINOR_NAME;
+ case DRM_NODE_CONTROL:
+ return DRM_CONTROL_MINOR_NAME;
+ case DRM_NODE_RENDER:
+ return DRM_RENDER_MINOR_NAME;
+ default:
+ return NULL;
+ }
+}
+#endif
+
+static const char *drmGetDeviceName(int type)
+{
+ switch (type) {
+ case DRM_NODE_PRIMARY:
+ return DRM_DEV_NAME;
+ case DRM_NODE_CONTROL:
+ return DRM_CONTROL_DEV_NAME;
+ case DRM_NODE_RENDER:
+ return DRM_RENDER_DEV_NAME;
+ default:
+ return NULL;
+ }
+}
+
+static int drmGetNodeNumber(const char *name)
+{
+ size_t name_len = strnlen(name, DRM_NODE_NAME_MAX);
+ while (name_len && isdigit(name[name_len - 1]))
+ --name_len;
+ return strtol(name + name_len, NULL, 10);
+}
+
+static int drmGetNodeType(const char *name)
+{
+ if (strncmp(name, DRM_PRIMARY_MINOR_NAME,
+ sizeof(DRM_PRIMARY_MINOR_NAME) - 1) == 0)
+ return DRM_NODE_PRIMARY;
+
+ if (strncmp(name, DRM_CONTROL_MINOR_NAME,
+ sizeof(DRM_CONTROL_MINOR_NAME ) - 1) == 0)
+ return DRM_NODE_CONTROL;
+
+ if (strncmp(name, DRM_RENDER_MINOR_NAME,
+ sizeof(DRM_RENDER_MINOR_NAME) - 1) == 0)
+ return DRM_NODE_RENDER;
+
+ return -1;
+}
+
/**
* Compare two busid strings
*
@@ -290,7 +370,7 @@ static int drmMatchBusID(const char *id1
*
* \internal
* Checks for failure. If failure was caused by signal call chown again.
- * If any other failure happened then it will output error mesage using
+ * If any other failure happened then it will output error message using
* drmMsg() call.
*/
#if !defined(UDEV)
@@ -327,8 +407,8 @@ static int chown_check_return(const char
static int drmOpenDevice(dev_t dev, int minor, int type)
{
stat_t st;
- const char *dev_name;
- char buf[64];
+ const char *dev_name = drmGetDeviceName(type);
+ char buf[DRM_NODE_NAME_MAX];
int fd;
mode_t devmode = DRM_DEV_MODE, serv_mode;
gid_t serv_group;
@@ -338,21 +418,14 @@ static int drmOpenDevice(dev_t dev, int
gid_t group = DRM_DEV_GID;
#endif
- 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:
+ if (!dev_name)
return -EINVAL;
- };
+#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
+ sprintf(buf, dev_name, DRM_DIR_NAME, minor + drmGetMinorBase(type));
+#else
sprintf(buf, dev_name, DRM_DIR_NAME, minor);
+#endif
drmMsg("drmOpenDevice: node name is %s\n", buf);
if (drm_server_info && drm_server_info->get_perms) {
@@ -456,27 +529,20 @@ wait_for_udev:
static int drmOpenMinor(int minor, int create, int type)
{
int fd;
- char buf[64];
- const char *dev_name;
+ char buf[DRM_NODE_NAME_MAX];
+ const char *dev_name = drmGetDeviceName(type);
if (create)
return drmOpenDevice(makedev(DRM_MAJOR, minor), minor, type);
- 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:
+ if (!dev_name)
return -EINVAL;
- };
+#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
+ sprintf(buf, dev_name, DRM_DIR_NAME, minor + drmGetMinorBase(type));
+#else
sprintf(buf, dev_name, DRM_DIR_NAME, minor);
+#endif
if ((fd = open(buf, O_RDWR, 0)) >= 0)
return fd;
return -errno;
@@ -517,51 +583,6 @@ int drmAvailable(void)
return retval;
}
-static int drmGetMinorBase(int type)
-{
- switch (type) {
- case DRM_NODE_PRIMARY:
- return 0;
- case DRM_NODE_CONTROL:
- return 64;
- case DRM_NODE_RENDER:
- return 128;
- default:
- return -1;
- };
-}
-
-static int drmGetMinorType(int minor)
-{
- int type = minor >> 6;
-
- if (minor < 0)
- return -1;
-
- switch (type) {
- case DRM_NODE_PRIMARY:
- case DRM_NODE_CONTROL:
- case DRM_NODE_RENDER:
- return type;
- default:
- return -1;
- }
-}
-
-static const char *drmGetMinorName(int type)
-{
- switch (type) {
- case DRM_NODE_PRIMARY:
- return DRM_PRIMARY_MINOR_NAME;
- case DRM_NODE_CONTROL:
- return DRM_CONTROL_MINOR_NAME;
- case DRM_NODE_RENDER:
- return DRM_RENDER_MINOR_NAME;
- default:
- return NULL;
- }
-}
-
/**
* Open the device by bus ID.
*
@@ -2705,33 +2726,40 @@ int drmDropMaster(int fd)
char *drmGetDeviceNameFromFd(int fd)
{
- char name[128];
- struct stat sbuf;
- dev_t d;
- int i;
-
/* The whole drmOpen thing is a fiasco and we need to find a way
* back to just using open(2). For now, however, lets just make
* things worse with even more ad hoc directory walking code to
* discover the device file name. */
+ stat_t sbuf;
fstat(fd, &sbuf);
- d = sbuf.st_rdev;
+ dev_t d = sbuf.st_rdev;
- for (i = 0; i < DRM_MAX_MINOR; i++) {
+ for (int i = 0; i < DRM_MAX_MINOR; i++) {
+ char name[DRM_NODE_NAME_MAX];
snprintf(name, sizeof name, DRM_DEV_NAME, DRM_DIR_NAME, i);
if (stat(name, &sbuf) == 0 && sbuf.st_rdev == d)
- break;
+ return strdup(name);
}
- if (i == DRM_MAX_MINOR)
- return NULL;
-
- return strdup(name);
+ return NULL;
}
int drmGetNodeTypeFromFd(int fd)
{
- struct stat sbuf;
+#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
+ char *name = drmGetDeviceNameFromFd2(fd);
+ if (!name) {
+ errno = ENODEV;
+ return -1;
+ }
+
+ int type = drmGetNodeType(name);
+ free(name);
+ if (type < 0)
+ errno = ENODEV;
+ return type;
+#else
+ stat_t sbuf;
int maj, min, type;
if (fstat(fd, &sbuf))
@@ -2749,6 +2777,7 @@ int drmGetNodeTypeFromFd(int fd)
if (type == -1)
errno = ENODEV;
return type;
+#endif
}
int drmPrimeHandleToFD(int fd, uint32_t handle, uint32_t flags, int *prime_fd)
@@ -2788,7 +2817,7 @@ static char *drmGetMinorNameForFD(int fd
#ifdef __linux__
DIR *sysdir;
struct dirent *pent, *ent;
- struct stat sbuf;
+ stat_t sbuf;
const char *name = drmGetMinorName(type);
int len;
char dev_name[64], buf[64];
@@ -2839,13 +2868,35 @@ static char *drmGetMinorNameForFD(int fd
out_close_dir:
closedir(sysdir);
+#elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
+ const char *dev_name = drmGetDeviceName(type);
+ if (!dev_name)
+ return NULL;
+
+ char *name = drmGetDeviceNameFromFd2(fd);
+ if (!name)
+ return NULL;
+
+ int oldnum = drmGetNodeNumber(name);
+ int oldtype = drmGetMinorType(oldnum);
+ if (oldtype < 0) {
+ free(name);
+ return NULL;
+ }
+
+ int newnum = oldnum - drmGetMinorBase(oldtype) + drmGetMinorBase(type);
+ snprintf(name, DRM_NODE_NAME_MAX, dev_name, DRM_DIR_NAME, newnum);
+ return name;
#else
- struct stat sbuf;
- char buf[PATH_MAX + 1];
- const char *dev_name;
+ stat_t sbuf;
+ char buf[DRM_NODE_NAME_MAX];
+ const char *dev_name = drmGetDeviceName(type);
unsigned int maj, min;
int n, base;
+ if (!dev_name)
+ return NULL;
+
if (fstat(fd, &sbuf))
return NULL;
@@ -2855,20 +2906,6 @@ out_close_dir:
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;
@@ -2966,7 +3003,7 @@ static int drmParseSubsystemType(int maj
return DRM_BUS_HOST1X;
return -EINVAL;
-#elif defined(__OpenBSD__)
+#elif defined(__OpenBSD__) || defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
return DRM_BUS_PCI;
#else
#warning "Missing implementation of drmParseSubsystemType"
@@ -2974,7 +3011,8 @@ static int drmParseSubsystemType(int maj
#endif
}
-static int drmParsePciBusInfo(int maj, int min, drmPciBusInfoPtr info)
+static int drmParsePciBusInfo(const char *node, int node_type,
+ int maj, int min, drmPciBusInfoPtr info)
{
#ifdef __linux__
unsigned int domain, bus, dev, func;
@@ -3023,6 +3061,60 @@ static int drmParsePciBusInfo(int maj, i
info->func = pinfo.func;
return 0;
+#elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
+ /*
+ * Only the primary nodes can be mapped to hw.dri.%i via major/minor
+ * Determine the primary node by offset and use its major/minor pair
+ */
+ if (node_type != DRM_NODE_PRIMARY) {
+ char name[DRM_NODE_NAME_MAX];
+ snprintf(name, sizeof(name), DRM_DEV_NAME, DRM_DIR_NAME,
+ drmGetNodeNumber(node) - drmGetMinorBase(node_type));
+
+ stat_t sbuf;
+ if (stat(name, &sbuf))
+ return -errno;
+
+ maj = major(sbuf.st_rdev);
+ min = minor(sbuf.st_rdev);
+ }
+ /*
+ * Major/minor appear after the driver name in the hw.dri.%i.name node
+ * Find the node with matching major/minor pair and parse the bus ID,
+ * which may be after the name or may be alone in hw.dri.%i.busid
+ */
+ #define bus_fmt "pci:%04x:%02x:%02x.%u"
+ #define name_fmt "%*s %x " bus_fmt
+ for (int i = 0; i < DRM_MAX_MINOR; ++i) {
+ char name[16], value[256];
+ size_t length = sizeof(value);
+ snprintf(name, sizeof(name), "hw.dri.%i.name", i);
+ if (sysctlbyname(name, value, &length, NULL, 0))
+ continue;
+
+ value[length] = '\0';
+ unsigned int rdev = 0, domain = 0, bus = 0, slot = 0, func = 0;
+ int vals = sscanf(value, name_fmt, &rdev, &domain, &bus, &slot, &func);
+
+ if (vals >= 1 && rdev == makedev(maj,min)) {
+ if (vals < 5) {
+ /* busid not in the name, try busid */
+ length = sizeof(value);
+ snprintf(name, sizeof(name), "hw.dri.%i.busid", i);
+ if (sysctlbyname(name, value, &length, NULL, 0))
+ break;
+ value[length] = '\0';
+ if (sscanf(value, bus_fmt, &domain, &bus, &slot, &func) != 4)
+ break;
+ }
+ info->domain = domain;
+ info->bus = bus;
+ info->dev = slot;
+ info->func = func;
+ return 0;
+ }
+ }
+ return -ENODEV;
#else
#warning "Missing implementation of drmParsePciBusInfo"
return -EINVAL;
@@ -3057,32 +3149,6 @@ static int drmCompareBusInfo(drmDevicePt
return -1;
}
-static int drmGetNodeType(const char *name)
-{
- if (strncmp(name, DRM_PRIMARY_MINOR_NAME,
- sizeof(DRM_PRIMARY_MINOR_NAME) - 1) == 0)
- return DRM_NODE_PRIMARY;
-
- if (strncmp(name, DRM_CONTROL_MINOR_NAME,
- sizeof(DRM_CONTROL_MINOR_NAME ) - 1) == 0)
- return DRM_NODE_CONTROL;
-
- if (strncmp(name, DRM_RENDER_MINOR_NAME,
- sizeof(DRM_RENDER_MINOR_NAME) - 1) == 0)
- return DRM_NODE_RENDER;
-
- return -EINVAL;
-}
-
-static int drmGetMaxNodeName(void)
-{
- return sizeof(DRM_DIR_NAME) +
- MAX3(sizeof(DRM_PRIMARY_MINOR_NAME),
- sizeof(DRM_CONTROL_MINOR_NAME),
- sizeof(DRM_RENDER_MINOR_NAME)) +
- 3 /* length of the node number */;
-}
-
#ifdef __linux__
static int parse_separate_sysfs_files(int maj, int min,
drmPciDeviceInfoPtr device,
@@ -3152,6 +3218,7 @@ static int parse_config_sysfs_file(int m
#endif
static int drmParsePciDeviceInfo(int maj, int min,
+ drmPciBusInfoPtr info,
drmPciDeviceInfoPtr device,
uint32_t flags)
{
@@ -3188,6 +3255,43 @@ static int drmParsePciDeviceInfo(int maj
device->subdevice_id = pinfo.subdevice_id;
return 0;
+#elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
+ struct pci_conf_io pc;
+ struct pci_match_conf patterns[1];
+ struct pci_conf results[1];
+
+ int fd = open("/dev/pci", O_RDONLY, 0);
+ if (fd < 0)
+ return -errno;
+
+ bzero(&patterns, sizeof(patterns));
+ patterns[0].pc_sel.pc_domain = info->domain;
+ patterns[0].pc_sel.pc_bus = info->bus;
+ patterns[0].pc_sel.pc_dev = info->dev;
+ patterns[0].pc_sel.pc_func = info->func;
+ patterns[0].flags = PCI_GETCONF_MATCH_DOMAIN | PCI_GETCONF_MATCH_BUS
+ | PCI_GETCONF_MATCH_DEV | PCI_GETCONF_MATCH_FUNC;
+ bzero(&pc, sizeof(struct pci_conf_io));
+ pc.num_patterns = 1;
+ pc.pat_buf_len = sizeof(patterns);
+ pc.patterns = patterns;
+ pc.match_buf_len = sizeof(results);
+ pc.matches = results;
+
+ if (ioctl(fd, PCIOCGETCONF, &pc) || pc.status == PCI_GETCONF_ERROR) {
+ int error = errno;
+ close(fd);
+ return -error;
+ }
+ close(fd);
+
+ device->vendor_id = results[0].pc_vendor;
+ device->device_id = results[0].pc_device;
+ device->subvendor_id = results[0].pc_subvendor;
+ device->subdevice_id = results[0].pc_subdevice;
+ device->revision_id = results[0].pc_revid;
+
+ return 0;
#else
#warning "Missing implementation of drmParsePciDeviceInfo"
return -EINVAL;
@@ -3268,7 +3372,7 @@ static drmDevicePtr drmDeviceAlloc(unsig
unsigned int i;
char *ptr;
- max_node_length = ALIGN(drmGetMaxNodeName(), sizeof(void *));
+ max_node_length = ALIGN(DRM_NODE_NAME_MAX, sizeof(void *));
extra = DRM_NODE_MAX * (sizeof(void *) + max_node_length);
size = sizeof(*device) + extra + bus_size + device_size;
@@ -3314,7 +3418,7 @@ static int drmProcessPciDevice(drmDevice
dev->businfo.pci = (drmPciBusInfoPtr)addr;
- ret = drmParsePciBusInfo(maj, min, dev->businfo.pci);
+ ret = drmParsePciBusInfo(node, node_type, maj, min, dev->businfo.pci);
if (ret)
goto free_device;
@@ -3323,7 +3427,7 @@ static int drmProcessPciDevice(drmDevice
addr += sizeof(drmPciBusInfo);
dev->deviceinfo.pci = (drmPciDeviceInfoPtr)addr;
- ret = drmParsePciDeviceInfo(maj, min, dev->deviceinfo.pci, flags);
+ ret = drmParsePciDeviceInfo(maj, min, dev->businfo.pci, dev->deviceinfo.pci, flags);
if (ret)
goto free_device;
}
@@ -3673,7 +3777,7 @@ static void drmFoldDuplicatedDevices(drm
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());
+ local_devices[j]->nodes[node_type], DRM_NODE_NAME_MAX);
drmFreeDevice(&local_devices[j]);
}
}
@@ -3691,7 +3795,7 @@ drm_device_validate_flags(uint32_t flags
* Get information about the opened drm device
*
* \param fd file descriptor of the drm device
- * \param flags feature/behaviour bitmask
+ * \param flags feature/behavior bitmask
* \param device the address of a drmDevicePtr where the information
* will be allocated in stored
*
@@ -3709,8 +3813,8 @@ int drmGetDevice2(int fd, uint32_t flags
* Avoid stat'ing all of /dev needlessly by implementing this custom path.
*/
drmDevicePtr d;
- struct stat sbuf;
- char node[PATH_MAX + 1];
+ stat_t sbuf;
+ char node[DRM_NODE_NAME_MAX];
const char *dev_name;
int node_type, subsystem_type;
int maj, min, n, ret, base;
@@ -3731,26 +3835,16 @@ int drmGetDevice2(int fd, uint32_t flags
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:
+ dev_name = drmGetDeviceName(node_type);
+ if (!dev_name)
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)
+ n = snprintf(node, sizeof(node), dev_name, DRM_DIR_NAME, min - base);
+ if (n == -1 || n >= sizeof(node))
return -errno;
if (stat(node, &sbuf))
return -EINVAL;
@@ -3771,8 +3865,8 @@ int drmGetDevice2(int fd, uint32_t flags
drmDevicePtr d;
DIR *sysdir;
struct dirent *dent;
- struct stat sbuf;
- char node[PATH_MAX + 1];
+ stat_t sbuf;
+ char node[DRM_NODE_NAME_MAX];
int node_type, subsystem_type;
int maj, min;
int ret, i, node_count;
@@ -3792,7 +3886,7 @@ int drmGetDevice2(int fd, uint32_t flags
maj = major(sbuf.st_rdev);
min = minor(sbuf.st_rdev);
- if (maj != DRM_MAJOR || !S_ISCHR(sbuf.st_mode))
+ if ((DRM_MAJOR && maj != DRM_MAJOR) || !S_ISCHR(sbuf.st_mode))
return -EINVAL;
subsystem_type = drmParseSubsystemType(maj, min);
@@ -3813,14 +3907,14 @@ int drmGetDevice2(int fd, uint32_t flags
if (node_type < 0)
continue;
- snprintf(node, PATH_MAX, "%s/%s", DRM_DIR_NAME, dent->d_name);
+ snprintf(node, sizeof(node), "%s/%s", DRM_DIR_NAME, dent->d_name);
if (stat(node, &sbuf))
continue;
maj = major(sbuf.st_rdev);
min = minor(sbuf.st_rdev);
- if (maj != DRM_MAJOR || !S_ISCHR(sbuf.st_mode))
+ if ((DRM_MAJOR && maj != DRM_MAJOR) || !S_ISCHR(sbuf.st_mode))
continue;
if (drmParseSubsystemType(maj, min) != subsystem_type)
@@ -3918,7 +4012,7 @@ int drmGetDevice(int fd, drmDevicePtr *d
/**
* Get drm devices on the system
*
- * \param flags feature/behaviour bitmask
+ * \param flags feature/behavior 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
@@ -3937,8 +4031,8 @@ int drmGetDevices2(uint32_t flags, drmDe
drmDevicePtr device;
DIR *sysdir;
struct dirent *dent;
- struct stat sbuf;
- char node[PATH_MAX + 1];
+ stat_t sbuf;
+ char node[DRM_NODE_NAME_MAX];
int node_type, subsystem_type;
int maj, min;
int ret, i, node_count, device_count;
@@ -3963,14 +4057,14 @@ int drmGetDevices2(uint32_t flags, drmDe
if (node_type < 0)
continue;
- snprintf(node, PATH_MAX, "%s/%s", DRM_DIR_NAME, dent->d_name);
+ snprintf(node, sizeof(node), "%s/%s", DRM_DIR_NAME, dent->d_name);
if (stat(node, &sbuf))
continue;
maj = major(sbuf.st_rdev);
min = minor(sbuf.st_rdev);
- if (maj != DRM_MAJOR || !S_ISCHR(sbuf.st_mode))
+ if ((DRM_MAJOR && maj != DRM_MAJOR) || !S_ISCHR(sbuf.st_mode))
continue;
subsystem_type = drmParseSubsystemType(maj, min);
@@ -4078,7 +4172,7 @@ int drmGetDevices(drmDevicePtr devices[]
char *drmGetDeviceNameFromFd2(int fd)
{
#ifdef __linux__
- struct stat sbuf;
+ stat_t sbuf;
char path[PATH_MAX + 1], *value;
unsigned int maj, min;
@@ -4101,9 +4195,26 @@ char *drmGetDeviceNameFromFd2(int fd)
free(value);
return strdup(path);
+#elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
+ stat_t sbuf;
+ if (fstat(fd, &sbuf))
+ return NULL;
+
+ dev_t rdev = sbuf.st_rdev;
+ /* minor numbers don't depend on node name suffix, search for a match */
+ for (int i = 0; i < DRM_MAX_MINOR; ++i) {
+ char node[DRM_NODE_NAME_MAX];
+ for (int j = 0; j < DRM_NODE_MAX; ++j) {
+ snprintf(node, sizeof(node), drmGetDeviceName(j),
+ DRM_DIR_NAME, drmGetMinorBase(j) + i);
+ if (stat(node, &sbuf) == 0 && sbuf.st_rdev == rdev)
+ return strdup(node);
+ }
+ }
+ return NULL;
#else
- struct stat sbuf;
- char node[PATH_MAX + 1];
+ stat_t sbuf;
+ char node[DRM_NODE_NAME_MAX];
const char *dev_name;
int node_type;
int maj, min, n, base;
@@ -4121,26 +4232,16 @@ char *drmGetDeviceNameFromFd2(int fd)
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:
+ dev_name = drmGetDeviceName(node_type);
+ if (!dev_name)
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)
+ n = snprintf(node, sizeof(node), dev_name, DRM_DIR_NAME, min - base);
+ if (n == -1 || n >= sizeof(node))
return NULL;
return strdup(node);
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