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drm/i915: extract card getting

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Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
This commit is contained in:
Ben Widawsky 2012-03-25 16:04:07 -07:00
parent 8af53e0b7e
commit 2585bea428
1 changed files with 83 additions and 39 deletions
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122
lib/drmtest.c
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@ -26,6 +26,8 @@
*
*/
#define _GNU_SOURCE
#include <stdio.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
@ -108,70 +110,112 @@ void gem_quiescent_gpu(int fd)
gem_sync(fd, handle);
}
/** Open the first DRM device we can find, searching up to 16 device nodes */
int drm_open_any(void)
static bool is_master(int fd)
{
char name[20];
drm_client_t client;
int ret;
/* Check that we're the only opener and authed. */
client.idx = 0;
ret = ioctl(fd, DRM_IOCTL_GET_CLIENT, &client);
assert (ret == 0);
if (!client.auth) {
return 0;
}
client.idx = 1;
ret = ioctl(fd, DRM_IOCTL_GET_CLIENT, &client);
if (ret != -1 || errno != EINVAL) {
return 0;
}
return 1;
}
/**
* drm_get_card() - get an intel card number for use in /dev or /sys
*
* @master: -1 not a master, 0 don't care, 1 is the master
*
* returns -1 on error
*/
int drm_get_card(int master)
{
char *name;
int i, fd;
for (i = 0; i < 16; i++) {
sprintf(name, "/dev/dri/card%d", i);
int ret;
ret = asprintf(&name, "/dev/dri/card%u", i);
if (ret == -1)
return -1;
fd = open(name, O_RDWR);
free(name);
if (fd == -1)
continue;
if (is_intel(fd)) {
if (is_intel(fd) && master == 0) {
gem_quiescent_gpu(fd);
return fd;
break;
}
if (master == 1 && is_master(fd)) {
close(fd);
break;
}
if (master == -1 && !is_master(fd)) {
close(fd);
break;
}
close(fd);
}
fprintf(stderr, "failed to open any drm device. retry as root?\n");
abort();
return i;
}
/** Open the first DRM device we can find, searching up to 16 device nodes */
int drm_open_any(void)
{
char *name;
int ret, fd;
ret = asprintf(&name, "/dev/dri/card%d", drm_get_card(0));
if (ret == -1)
return -1;
fd = open(name, O_RDWR);
free(name);
if (fd == -1)
fprintf(stderr, "failed to open any drm device. retry as root?\n");
assert(is_intel(fd));
return fd;
}
/**
* Open the first DRM device we can find where we end up being the master.
*/
int drm_open_any_master(void)
{
char name[20];
int i, fd;
char *name;
int ret, fd;
for (i = 0; i < 16; i++) {
drm_client_t client;
int ret;
ret = asprintf(&name, "/dev/dri/card%d", drm_get_card(1));
if (ret == -1)
return -1;
sprintf(name, "/dev/dri/card%d", i);
fd = open(name, O_RDWR);
if (fd == -1)
continue;
fd = open(name, O_RDWR);
free(name);
if (fd == -1)
fprintf(stderr, "Couldn't find an un-controlled DRM device\n");
if (!is_intel(fd)) {
close(fd);
continue;
}
assert(is_intel(fd));
/* Check that we're the only opener and authed. */
client.idx = 0;
ret = ioctl(fd, DRM_IOCTL_GET_CLIENT, &client);
assert (ret == 0);
if (!client.auth) {
close(fd);
continue;
}
client.idx = 1;
ret = ioctl(fd, DRM_IOCTL_GET_CLIENT, &client);
if (ret != -1 || errno != EINVAL) {
close(fd);
continue;
}
return fd;
}
fprintf(stderr, "Couldn't find an un-controlled DRM device\n");
abort();
return fd;
}
void gem_set_tiling(int fd, uint32_t handle, int tiling, int stride)