int armsoc_bo_cpu_prep(struct armsoc_bo *bo, enum armsoc_gem_op op)
{
int ret = 0;
assert(bo->refcnt > 0);
if (armsoc_bo_has_dmabuf(bo)) {
fd_set fds;
/* 10s before printing a msg */
const struct timeval timeout = {10, 0};
struct timeval t;
FD_ZERO(&fds);
FD_SET(bo->dmabuf, &fds);
do {
t = timeout;
ret = select(bo->dmabuf+1, &fds, NULL, NULL, &t);
if (ret == 0)
xf86DrvMsg(-1, X_ERROR,
"select() on dma_buf fd has timed-out\n");
} while ((ret == -1 && errno == EINTR) || ret == 0);
if (ret > 0)
ret = 0;
}
return ret;
}
void armsoc_bo_clear_dmabuf(struct armsoc_bo *bo)
{
assert(bo->refcnt > 0);
assert(armsoc_bo_has_dmabuf(bo));
close(bo->dmabuf);
bo->dmabuf = -1;
}
/* used by DRI2 code to play buffer switcharoo */
void
ARMSOCPixmapExchange(PixmapPtr a, PixmapPtr b)
{
struct ARMSOCPixmapPrivRec *apriv = exaGetPixmapDriverPrivate(a);
struct ARMSOCPixmapPrivRec *bpriv = exaGetPixmapDriverPrivate(b);
exchange(apriv->priv, bpriv->priv);
exchange(apriv->bo, bpriv->bo);
/* Ensure neither pixmap has a dmabuf fd attached to the bo if the
* ext_access_cnt refcount is 0, as it will never be cleared. */
if (armsoc_bo_has_dmabuf(apriv->bo) && !apriv->ext_access_cnt) {
armsoc_bo_clear_dmabuf(apriv->bo);
/* Should only have to clear one dmabuf fd, otherwise the
* refcount is wrong */
assert(!armsoc_bo_has_dmabuf(bpriv->bo));
} else if (armsoc_bo_has_dmabuf(bpriv->bo) && !bpriv->ext_access_cnt) {
armsoc_bo_clear_dmabuf(bpriv->bo);
assert(!armsoc_bo_has_dmabuf(apriv->bo));
}
}
int armsoc_bo_set_dmabuf(struct armsoc_bo *bo)
{
int res;
struct drm_prime_handle prime_handle;
assert(bo->refcnt > 0);
assert(!armsoc_bo_has_dmabuf(bo));
/* Try to get dma_buf fd */
prime_handle.handle = bo->handle;
prime_handle.flags = 0;
res = drmIoctl(bo->dev->fd, DRM_IOCTL_PRIME_HANDLE_TO_FD,
&prime_handle);
if (res)
res = errno;
else
bo->dmabuf = prime_handle.fd;
return res;
}