Add device enumeration interface (v4)
Add an interface for enumerating PCI devices on a system. v3: switch to udev/sysfs for the enumeration v4: fix warnings Signed-off-by: Frank Min <frank.min@amd.com> Reviewed-by: Christian König <christian.koenig@amd.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Reviewed-by: Jammy Zhou <Jammy.Zhou@amd.com>main
frank
Alex Deucher
parent
bb0b97e673
commit
fde4969176
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@ -95,12 +95,15 @@ SUBDIRS = \
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libdrm_la_LTLIBRARIES = libdrm.la
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libdrm_ladir = $(libdir)
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libdrm_la_LDFLAGS = -version-number 2:4:0 -no-undefined
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libdrm_la_LIBADD = @CLOCK_LIB@
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libdrm_la_LIBADD = \
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@CLOCK_LIB@ \
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@LIBUDEV_LIBS@
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libdrm_la_CPPFLAGS = -I$(top_srcdir)/include/drm
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AM_CFLAGS = \
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$(WARN_CFLAGS) \
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$(VALGRIND_CFLAGS)
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$(VALGRIND_CFLAGS) \
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$(LIBUDEV_CFLAGS)
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libdrm_la_SOURCES = $(LIBDRM_FILES)
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100
xf86drm.c
100
xf86drm.c
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@ -63,6 +63,7 @@
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#include "xf86drm.h"
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#include "libdrm_macros.h"
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#include "libudev.h"
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#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
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#define DRM_MAJOR 145
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@ -2817,3 +2818,102 @@ char *drmGetRenderDeviceNameFromFd(int fd)
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{
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return drmGetMinorNameForFD(fd, DRM_NODE_RENDER);
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}
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/**
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* Enumerate the GPU devices on the system
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*
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* \param devs device array set to return the device information
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* (if NULL, the number of device is returned)
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* \param vendor the vendor ID for GPU devices to list
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* (optional, if not specified, all GPU devices are returned)
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*
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* \return the number of GPU devices
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*/
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int drmGetPciDevices(drmPciDevicePtr devSet, uint16_t vendorId)
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{
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struct udev *udev = NULL;
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struct udev_enumerate *udev_enumerate;
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struct udev_list_entry *list_entry;
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struct udev_device *device;
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int drmDevCount = 0;
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int vendor = 0;
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int devid = 0;
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int subvendor = 0;
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int subdevid = 0;
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int revid = 0xff;
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int domain = 0;
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int bus = 0;
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int dev = 0;
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int func = 0;
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char config[64] = {0};
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char node[128] = {'\0'};
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char slot[] = "0000:00:00.0";
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const char *info = NULL;
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int fd = 0;
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int ret = 0;
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udev = udev_new();
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if (udev == NULL) {
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fprintf(stderr, "no context\n");
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return -EINVAL;
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}
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udev_enumerate = udev_enumerate_new(udev);
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if (udev_enumerate == NULL)
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return -EINVAL;
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udev_enumerate_add_match_subsystem(udev_enumerate, "drm");
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udev_enumerate_add_match_property(udev_enumerate, "DEVTYPE", "drm_minor");
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udev_enumerate_scan_devices(udev_enumerate);
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udev_list_entry_foreach(list_entry, udev_enumerate_get_list_entry(udev_enumerate)) {
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device = udev_device_new_from_syspath(udev_enumerate_get_udev(udev_enumerate),
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udev_list_entry_get_name(list_entry));
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if (device != NULL) {
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info = udev_device_get_property_value(device, "MINOR");
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if (!strcmp(info, "0")) {
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strcpy(node, udev_device_get_syspath(device));
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info = strstr(node, "/drm");
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strncpy(slot, info - strlen(slot), strlen(slot));
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if (sscanf(slot, "%4x:%2x:%2x.%1x", &domain, &bus, &dev, &func) != 4) {
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domain = 0;
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bus = 0;
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dev = 0;
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func = 0;
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}
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strcpy(node + strlen(node), "/device/config");
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fd = open(node, O_RDONLY);
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if (fd >= 0) {
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ret = read(fd, config, 64);
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if (ret == 64) {
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vendor = config[0] + (config[1] << 8);
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devid = config[2] + (config[3] << 8);
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revid = config[8];
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subdevid = config[44] + (config[45] << 8);
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}
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close(fd);
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}
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if((vendorId == 0) || (vendorId == vendor)) {
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if(devSet != NULL) {
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devSet[drmDevCount].domain = domain;
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devSet[drmDevCount].bus = bus;
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devSet[drmDevCount].dev = dev;
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devSet[drmDevCount].func = func;
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devSet[drmDevCount].vendor_id = vendor;
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devSet[drmDevCount].device_id = devid;
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devSet[drmDevCount].subdevice_id = subdevid;
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devSet[drmDevCount].subvendor_id = subvendor;
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devSet[drmDevCount].revision_id = revid;
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}
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drmDevCount++;
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}
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}
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}
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udev_device_unref(device);
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}
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udev_enumerate_unref(udev_enumerate);
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udev_unref(udev);
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return drmDevCount;
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}
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19
xf86drm.h
19
xf86drm.h
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@ -342,6 +342,24 @@ typedef struct _drmSetVersion {
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int drm_dd_minor;
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} drmSetVersion, *drmSetVersionPtr;
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/**
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* Structure to a general pci gpu device
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*
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* \sa drmGetDevices()
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*
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*/
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typedef struct _drmPciDevice {
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uint16_t domain;
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uint8_t bus;
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uint8_t dev;
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uint8_t func;
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uint16_t vendor_id;
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uint16_t device_id;
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uint16_t subvendor_id;
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uint16_t subdevice_id;
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uint8_t revision_id;
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} drmPciDevice, *drmPciDevicePtr;
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#define __drm_dummy_lock(lock) (*(__volatile__ unsigned int *)lock)
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#define DRM_LOCK_HELD 0x80000000U /**< Hardware lock is held */
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@ -552,6 +570,7 @@ do { register unsigned int __old __asm("o0"); \
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/* General user-level programmer's API: unprivileged */
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extern int drmAvailable(void);
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extern int drmOpen(const char *name, const char *busid);
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extern int drmGetPciDevices(drmPciDevicePtr devSet, uint16_t vendorId);
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#define DRM_NODE_PRIMARY 0
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#define DRM_NODE_CONTROL 1
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