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libdrm: Implement drmParsePciDeviceInfo for FreeBSD 

The FreeBSD kernel expose a pseudo-device /dev/pci to obtain information
about present PCI device.
Uee the PCIOCGETCONF ioctl on this device to look up the desired device
information.

Signed-off-by: Emmanuel Vadot <manu@FreeBSD.org>
Reviewed-by: Eric Engestrom <eric@engestrom.ch>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>
main
Emmanuel Vadot 2020-01-21 18:49:47 +01:00 committed by Emmanuel Vadot
parent 44bcf9c0ce
commit e321dd7a4d
1 changed files with 43 additions and 0 deletions
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43
xf86drm.c
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@ -64,6 +64,7 @@
#if defined(__FreeBSD__)
#include <sys/param.h>
#include <sys/pciio.h>
#endif
#define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
@ -3415,6 +3416,48 @@ static int drmParsePciDeviceInfo(int maj, int min,
device->subvendor_id = pinfo.subvendor_id;
device->subdevice_id = pinfo.subdevice_id;
return 0;
#elif __FreeBSD__
drmPciBusInfo info;
struct pci_conf_io pc;
struct pci_match_conf patterns[1];
struct pci_conf results[1];
int fd, error;
if (get_sysctl_pci_bus_info(maj, min, &info) != 0)
return -EINVAL;
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) {
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"