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Bug 6242: [mach64] Use private DMA buffers, part #2. 

Factor out from mach64_dma_dispatch_vertex() the code to reclaim an unsed
buffer, in preperation for using it in mach64_dma_dispatch_blit() also.
main
George Sapountzis 2006-08-28 05:44:37 +03:00
parent eea150e776
commit 25760c30d4
3 changed files with 81 additions and 72 deletions
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27
shared-core/mach64_dma.c
View File

@ -1449,6 +1449,33 @@ drm_buf_t *mach64_freelist_get(drm_mach64_private_t * dev_priv)
return entry->buf;
}
int mach64_freelist_put(drm_mach64_private_t * dev_priv, drm_buf_t * copy_buf)
{
struct list_head *ptr;
drm_mach64_freelist_t *entry;
#if MACH64_EXTRA_CHECKING
list_for_each(ptr, &dev_priv->pending) {
entry = list_entry(ptr, drm_mach64_freelist_t, list);
if (copy_buf == entry->buf) {
DRM_ERROR("%s: Trying to release a pending buf\n",
__FUNCTION__);
return DRM_ERR(EFAULT);
}
}
#endif
ptr = dev_priv->placeholders.next;
entry = list_entry(ptr, drm_mach64_freelist_t, list);
copy_buf->pending = 0;
copy_buf->used = 0;
entry->buf = copy_buf;
entry->discard = 1;
list_del(ptr);
list_add_tail(ptr, &dev_priv->free_list);
return 0;
}
/*@}*/

2
shared-core/mach64_drv.h
View File

@ -123,6 +123,8 @@ extern void mach64_driver_lastclose(drm_device_t * dev);
extern int mach64_init_freelist(drm_device_t * dev);
extern void mach64_destroy_freelist(drm_device_t * dev);
extern drm_buf_t *mach64_freelist_get(drm_mach64_private_t * dev_priv);
extern int mach64_freelist_put(drm_mach64_private_t * dev_priv,
drm_buf_t * copy_buf);
extern int mach64_do_wait_for_fifo(drm_mach64_private_t * dev_priv,
int entries);

68
shared-core/mach64_state.c
View File

@ -546,12 +546,15 @@ static __inline__ int copy_and_verify_from_user(u32 *to,
}
static int mach64_dma_dispatch_vertex(DRMFILE filp, drm_device_t * dev,
int prim, void *buf, unsigned long used,
int discard)
drm_mach64_vertex_t * vertex)
{
drm_mach64_private_t *dev_priv = dev->dev_private;
drm_mach64_sarea_t *sarea_priv = dev_priv->sarea_priv;
drm_buf_t *copy_buf;
void *buf = vertex->buf;
unsigned long used = vertex->used;
int ret = 0;
int i = 0;
int done = 0;
int verify_ret = 0;
DMALOCALS;
@ -559,20 +562,21 @@ static int mach64_dma_dispatch_vertex(DRMFILE filp, drm_device_t * dev,
DRM_DEBUG("%s: buf=%p used=%lu nbox=%d\n",
__FUNCTION__, buf, used, sarea_priv->nbox);
if (used) {
int ret = 0;
int i = 0;
if (!used)
goto _vertex_done;
copy_buf = mach64_freelist_get(dev_priv);
if (copy_buf == NULL) {
DRM_ERROR("%s: couldn't get buffer in DMAGETPTR\n",
__FUNCTION__);
DRM_ERROR("%s: couldn't get buffer\n", __FUNCTION__);
return DRM_ERR(EAGAIN);
}
if ((verify_ret =
copy_and_verify_from_user(GETBUFPTR(copy_buf), buf,
used)) == 0) {
verify_ret = copy_and_verify_from_user(GETBUFPTR(copy_buf), buf, used);
if (verify_ret != 0) {
mach64_freelist_put(dev_priv, copy_buf);
goto _vertex_done;
}
copy_buf->used = used;
@ -587,10 +591,8 @@ static int mach64_dma_dispatch_vertex(DRMFILE filp, drm_device_t * dev,
do {
/* Emit the next cliprect */
if (i < sarea_priv->nbox) {
ret =
mach64_emit_cliprect(filp, dev_priv,
&sarea_priv->
boxes[i]);
ret = mach64_emit_cliprect(filp, dev_priv,
&sarea_priv->boxes[i]);
if (ret < 0) {
/* failed to get buffer */
return ret;
@ -606,40 +608,19 @@ static int mach64_dma_dispatch_vertex(DRMFILE filp, drm_device_t * dev,
DMAADVANCE(dev_priv, done);
} while (++i < sarea_priv->nbox);
}
if (copy_buf->pending && !done) {
if (!done) {
if (copy_buf->pending) {
DMADISCARDBUF();
} else if (!done) {
/* This buffer wasn't used (no cliprects or verify failed), so place it back
* on the free list
} else {
/* This buffer wasn't used (no cliprects), so place it
* back on the free list
*/
struct list_head *ptr;
drm_mach64_freelist_t *entry;
#if MACH64_EXTRA_CHECKING
list_for_each(ptr, &dev_priv->pending) {
entry =
list_entry(ptr, drm_mach64_freelist_t,
list);
if (copy_buf == entry->buf) {
DRM_ERROR
("%s: Trying to release a pending buf\n",
__FUNCTION__);
return DRM_ERR(EFAULT);
}
}
#endif
ptr = dev_priv->placeholders.next;
entry = list_entry(ptr, drm_mach64_freelist_t, list);
copy_buf->pending = 0;
copy_buf->used = 0;
entry->buf = copy_buf;
entry->discard = 1;
list_del(ptr);
list_add_tail(ptr, &dev_priv->free_list);
mach64_freelist_put(dev_priv, copy_buf);
}
}
_vertex_done:
sarea_priv->dirty &= ~MACH64_UPLOAD_CLIPRECTS;
sarea_priv->nbox = 0;
@ -842,8 +823,7 @@ int mach64_dma_vertex(DRM_IOCTL_ARGS)
if (sarea_priv->nbox > MACH64_NR_SAREA_CLIPRECTS)
sarea_priv->nbox = MACH64_NR_SAREA_CLIPRECTS;
return mach64_dma_dispatch_vertex(filp, dev, vertex.prim, vertex.buf,
vertex.used, vertex.discard);
return mach64_dma_dispatch_vertex(filp, dev, &vertex);
}
int mach64_dma_blit(DRM_IOCTL_ARGS)