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#include <assert.h>
#include <unistd.h>
#include <stdio.h>
#include <string.h>
#include "xf86drm.h"
char *pciBusID = "PCI:1:0:0";
#define DRM_PAGE_SIZE 4096
void *pSAREA;
static int client( void )
{
int fd, ret, err;
drmContext clientContext;
fprintf(stderr, "Opening client drm\n");
fd = drmOpen(NULL,pciBusID);
if (fd < 0) {
fprintf(stderr, "failed to open DRM: %s\n", strerror(-fd));
return 1;
}
fprintf(stderr, "Create server context\n");
if ((err = drmCreateContext(fd, &clientContext)) != 0) {
fprintf(stderr, "%s: drmCreateContext failed %d\n", __FUNCTION__, err);
return 0;
}
fprintf(stderr, "DRM_LOCK( %d %p %d )\n", fd, pSAREA, clientContext);
DRM_LOCK(fd, pSAREA, clientContext, 0);
fprintf(stderr, "locked\n");
DRM_UNLOCK(fd, pSAREA, clientContext);
fprintf(stderr, "DRM_UNLOCK finished\n");
fprintf(stderr, "Closing client drm: %d\n", fd);
ret = drmClose(fd);
fprintf(stderr, "done %d\n", ret);
return ret;
}
int main( int argc, char *argv[] )
{
char *drmModuleName = "radeon";
int drmFD;
int err;
int SAREASize;
drmHandle hSAREA;
drmContext serverContext;
/* Note that drmOpen will try to load the kernel module, if needed. */
drmFD = drmOpen(drmModuleName, NULL );
if (drmFD < 0) {
/* failed to open DRM */
fprintf(stderr, "[drm] drmOpen failed\n");
return 0;
}
if ((err = drmSetBusid(drmFD, pciBusID)) < 0) {
drmClose(drmFD);
fprintf(stderr, "[drm] drmSetBusid failed (%d, %s), %s\n",
drmFD, pciBusID, strerror(-err));
return 0;
}
SAREASize = DRM_PAGE_SIZE;
if (drmAddMap( drmFD,
0,
SAREASize,
DRM_SHM,
DRM_CONTAINS_LOCK,
&hSAREA) < 0)
{
drmClose(drmFD);
fprintf(stderr, "[drm] drmAddMap failed\n");
return 0;
}
fprintf(stderr, "[drm] added %d byte SAREA at 0x%08lx\n",
SAREASize, hSAREA);
if (drmMap( drmFD,
hSAREA,
SAREASize,
(drmAddressPtr)(&pSAREA)) < 0)
{
drmClose(drmFD);
fprintf(stderr, "[drm] drmMap failed\n");
return 0;
}
memset(pSAREA, 0, SAREASize);
fprintf(stderr, "[drm] mapped SAREA 0x%08lx to %p, size %d\n",
hSAREA, pSAREA, SAREASize);
fprintf(stderr, "Create server context\n");
if ((err = drmCreateContext(drmFD, &serverContext)) != 0) {
fprintf(stderr, "%s: drmCreateContext failed %d\n", __FUNCTION__, err);
return 0;
}
fprintf(stderr, "DRM_LOCK( %d %p %d )\n", drmFD, pSAREA, serverContext);
DRM_LOCK(drmFD, pSAREA, serverContext, 0);
fprintf(stderr, "locked\n");
DRM_UNLOCK(drmFD, pSAREA, serverContext);
fprintf(stderr, "DRM_UNLOCK finished\n");
client();
fprintf(stderr, "DRM_LOCK( %d %p %d )\n", drmFD, pSAREA, serverContext);
DRM_LOCK(drmFD, pSAREA, serverContext, 0);
fprintf(stderr, "locked\n");
DRM_UNLOCK(drmFD, pSAREA, serverContext);
fprintf(stderr, "DRM_UNLOCK finished\n");
drmUnmap(pSAREA, SAREASize);
fprintf(stderr, "[drm] unmapped SAREA 0x%08lx from %p, size %d\n",
hSAREA, pSAREA, SAREASize);
pSAREA = 0;
fprintf(stderr, "%s: Closing DRM fd\n", __FUNCTION__);
(void)drmClose(drmFD);
return 0;
}
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