diff options
| -rw-r--r-- | shared-core/mach64_dma.c | 155 |
1 files changed, 80 insertions, 75 deletions
diff --git a/shared-core/mach64_dma.c b/shared-core/mach64_dma.c index 36fddf0e..3f4394c0 100644 --- a/shared-core/mach64_dma.c +++ b/shared-core/mach64_dma.c @@ -1329,17 +1329,88 @@ int mach64_do_release_used_buffers(drm_mach64_private_t * dev_priv) return 0; } +static int mach64_do_reclaim_completed(drm_mach64_private_t * dev_priv) +{ + drm_mach64_descriptor_ring_t *ring = &dev_priv->ring; + struct list_head *ptr; + struct list_head *tmp; + drm_mach64_freelist_t *entry; + u32 head, tail, ofs; + + mach64_ring_tick(dev_priv, ring); + head = ring->head; + tail = ring->tail; + + if (head == tail) { +#if MACH64_EXTRA_CHECKING + if (MACH64_READ(MACH64_GUI_STAT) & MACH64_GUI_ACTIVE) { + DRM_ERROR("Empty ring with non-idle engine!\n"); + mach64_dump_ring_info(dev_priv); + return -1; + } +#endif + /* last pass is complete, so release everything */ + mach64_do_release_used_buffers(dev_priv); + DRM_DEBUG("%s: idle engine, freed all buffers.\n", + __FUNCTION__); + if (list_empty(&dev_priv->free_list)) { + DRM_ERROR("Freelist empty with idle engine\n"); + return -1; + } + return 0; + } + /* Look for a completed buffer and bail out of the loop + * as soon as we find one -- don't waste time trying + * to free extra bufs here, leave that to do_release_used_buffers + */ + list_for_each_safe(ptr, tmp, &dev_priv->pending) { + entry = list_entry(ptr, drm_mach64_freelist_t, list); + ofs = entry->ring_ofs; + if (entry->discard && + ((head < tail && (ofs < head || ofs >= tail)) || + (head > tail && (ofs < head && ofs >= tail)))) { +#if MACH64_EXTRA_CHECKING + int i; + + for (i = head; i != tail; i = (i + 4) & ring->tail_mask) + { + u32 o1 = le32_to_cpu(((u32 *) ring-> + start)[i + 1]); + u32 o2 = GETBUFADDR(entry->buf); + + if (o1 == o2) { + DRM_ERROR + ("Attempting to free used buffer: " + "i=%d buf=0x%08x\n", + i, o1); + mach64_dump_ring_info(dev_priv); + return -1; + } + } +#endif + /* found a processed buffer */ + entry->buf->pending = 0; + list_del(ptr); + list_add_tail(ptr, &dev_priv->free_list); + DRM_DEBUG + ("%s: freed processed buffer (head=%d tail=%d " + "buf ring ofs=%d).\n", + __FUNCTION__, head, tail, ofs); + return 0; + } + } + + return 1; +} + drm_buf_t *mach64_freelist_get(drm_mach64_private_t * dev_priv) { drm_mach64_descriptor_ring_t *ring = &dev_priv->ring; drm_mach64_freelist_t *entry; struct list_head *ptr; - struct list_head *tmp; int t; if (list_empty(&dev_priv->free_list)) { - u32 head, tail, ofs; - if (list_empty(&dev_priv->pending)) { DRM_ERROR ("Couldn't get buffer - pending and free lists empty\n"); @@ -1351,81 +1422,15 @@ drm_buf_t *mach64_freelist_get(drm_mach64_private_t * dev_priv) return NULL; } - tail = ring->tail; for (t = 0; t < dev_priv->usec_timeout; t++) { - mach64_ring_tick(dev_priv, ring); - head = ring->head; + int ret; - if (head == tail) { -#if MACH64_EXTRA_CHECKING - if (MACH64_READ(MACH64_GUI_STAT) & - MACH64_GUI_ACTIVE) { - DRM_ERROR - ("Empty ring with non-idle engine!\n"); - mach64_dump_ring_info(dev_priv); - return NULL; - } -#endif - /* last pass is complete, so release everything */ - mach64_do_release_used_buffers(dev_priv); - DRM_DEBUG - ("%s: idle engine, freed all buffers.\n", - __FUNCTION__); - if (list_empty(&dev_priv->free_list)) { - DRM_ERROR - ("Freelist empty with idle engine\n"); - return NULL; - } + ret = mach64_do_reclaim_completed(dev_priv); + if (ret == 0) goto _freelist_entry_found; - } - /* Look for a completed buffer and bail out of the loop - * as soon as we find one -- don't waste time trying - * to free extra bufs here, leave that to do_release_used_buffers - */ - list_for_each_safe(ptr, tmp, &dev_priv->pending) { - entry = - list_entry(ptr, drm_mach64_freelist_t, - list); - ofs = entry->ring_ofs; - if (entry->discard && - ((head < tail - && (ofs < head || ofs >= tail)) - || (head > tail - && (ofs < head && ofs >= tail)))) { -#if MACH64_EXTRA_CHECKING - int i; - - for (i = head; i != tail; - i = (i + 4) & ring->tail_mask) { - u32 o1 = - le32_to_cpu(((u32 *) ring-> - start)[i + 1]); - u32 o2 = GETBUFADDR(entry->buf); - - if (o1 == o2) { - DRM_ERROR - ("Attempting to free used buffer: " - "i=%d buf=0x%08x\n", - i, o1); - mach64_dump_ring_info - (dev_priv); - return NULL; - } - } -#endif - /* found a processed buffer */ - entry->buf->pending = 0; - list_del(ptr); - entry->buf->used = 0; - list_add_tail(ptr, - &dev_priv->placeholders); - DRM_DEBUG - ("%s: freed processed buffer (head=%d tail=%d " - "buf ring ofs=%d).\n", - __FUNCTION__, head, tail, ofs); - return entry->buf; - } - } + if (ret < 0) + return NULL; + DRM_UDELAY(1); } mach64_dump_ring_info(dev_priv); |