summaryrefslogtreecommitdiff
path: root/bsd/drm/lists.c
diff options
context:
space:
mode:
Diffstat (limited to 'bsd/drm/lists.c')
-rw-r--r--bsd/drm/lists.c278
1 files changed, 0 insertions, 278 deletions
diff --git a/bsd/drm/lists.c b/bsd/drm/lists.c
deleted file mode 100644
index b9722973..00000000
--- a/bsd/drm/lists.c
+++ /dev/null
@@ -1,278 +0,0 @@
-/* lists.c -- Buffer list handling routines -*- c -*-
- * Created: Mon Apr 19 20:54:22 1999 by faith@precisioninsight.com
- *
- * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
- * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
- * All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice (including the next
- * paragraph) shall be included in all copies or substantial portions of the
- * Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
- * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
- * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
- * DEALINGS IN THE SOFTWARE.
- *
- * Authors:
- * Rickard E. (Rik) Faith <faith@valinux.com>
- *
- */
-
-#define __NO_VERSION__
-#include "drmP.h"
-
-int drm_waitlist_create(drm_waitlist_t *bl, int count)
-{
- DRM_DEBUG("%d\n", count);
- if (bl->count) return EINVAL;
-
- bl->count = count;
- bl->bufs = drm_alloc((bl->count + 2) * sizeof(*bl->bufs),
- DRM_MEM_BUFLISTS);
- bl->rp = bl->bufs;
- bl->wp = bl->bufs;
- bl->end = &bl->bufs[bl->count+1];
- simple_lock_init(&bl->write_lock);
- simple_lock_init(&bl->read_lock);
- return 0;
-}
-
-int drm_waitlist_destroy(drm_waitlist_t *bl)
-{
- DRM_DEBUG("\n");
- if (bl->rp != bl->wp) return EINVAL;
- if (bl->bufs) drm_free(bl->bufs,
- (bl->count + 2) * sizeof(*bl->bufs),
- DRM_MEM_BUFLISTS);
- bl->count = 0;
- bl->bufs = NULL;
- bl->rp = NULL;
- bl->wp = NULL;
- bl->end = NULL;
- return 0;
-}
-
-int drm_waitlist_put(drm_waitlist_t *bl, drm_buf_t *buf)
-{
- int left;
- int s;
-
- left = DRM_LEFTCOUNT(bl);
- DRM_DEBUG("put %d (%d left, rp = %p, wp = %p)\n",
- buf->idx, left, bl->rp, bl->wp);
- if (!left) {
- DRM_ERROR("Overflow while adding buffer %d from pid %d\n",
- buf->idx, buf->pid);
- return EINVAL;
- }
-#if DRM_DMA_HISTOGRAM
- getnanotime(&buf->time_queued);
-#endif
- buf->list = DRM_LIST_WAIT;
-
- simple_lock(&bl->write_lock);
- s = spldrm();
- *bl->wp = buf;
- if (++bl->wp >= bl->end) bl->wp = bl->bufs;
- splx(s);
- simple_unlock(&bl->write_lock);
-
- return 0;
-}
-
-drm_buf_t *drm_waitlist_get(drm_waitlist_t *bl)
-{
- drm_buf_t *buf;
- int s;
-
- simple_lock(&bl->read_lock);
- s = spldrm();
- buf = *bl->rp;
- if (bl->rp == bl->wp) {
- splx(s);
- simple_unlock(&bl->read_lock);
- return NULL;
- }
- if (++bl->rp >= bl->end) bl->rp = bl->bufs;
- splx(s);
- simple_unlock(&bl->read_lock);
-
- DRM_DEBUG("get %d\n", buf->idx);
- return buf;
-}
-
-int drm_freelist_create(drm_freelist_t *bl, int count)
-{
- DRM_DEBUG("\n");
- atomic_set(&bl->count, 0);
- bl->next = NULL;
- bl->waiting = 0;
- bl->low_mark = 0;
- bl->high_mark = 0;
- atomic_set(&bl->wfh, 0);
-/* bl->lock = SPIN_LOCK_UNLOCKED; */
- ++bl->initialized;
- return 0;
-}
-
-int drm_freelist_destroy(drm_freelist_t *bl)
-{
- DRM_DEBUG("\n");
- atomic_set(&bl->count, 0);
- bl->next = NULL;
- return 0;
-}
-
-int drm_freelist_put(drm_device_t *dev, drm_freelist_t *bl, drm_buf_t *buf)
-{
- unsigned int old;
- unsigned int new;
- char failed;
- int count = 0;
- drm_device_dma_t *dma = dev->dma;
-
- if (!dma) {
- DRM_ERROR("No DMA support\n");
- return 1;
- }
-
- if (buf->waiting || buf->pending || buf->list == DRM_LIST_FREE) {
- DRM_ERROR("Freed buffer %d: w%d, p%d, l%d\n",
- buf->idx, buf->waiting, buf->pending, buf->list);
- }
- DRM_DEBUG("%d, count = %d, wfh = %d, w%d, p%d\n",
- buf->idx, atomic_read(&bl->count), atomic_read(&bl->wfh),
- buf->waiting, buf->pending);
- if (!bl) return 1;
-#if DRM_DMA_HISTOGRAM
- getnanotime(&buf->time_freed);
- drm_histogram_compute(dev, buf);
-#endif
- buf->list = DRM_LIST_FREE;
-/*
- do {
- old = (unsigned long)bl->next;
- buf->next = (void *)old;
- new = (unsigned long)buf;
- _DRM_CAS(&bl->next, old, new, failed);
- if (++count > DRM_LOOPING_LIMIT) {
- DRM_ERROR("Looping\n");
- return 1;
- }
- } while (failed);
-*/
-
- simple_lock(&bl->lock);
- buf->next = bl->next;
- bl->next = buf;
- simple_unlock(&bl->lock);
-
- atomic_inc(&bl->count);
- if (atomic_read(&bl->count) > dma->buf_count) {
- DRM_ERROR("%d of %d buffers free after addition of %d\n",
- atomic_read(&bl->count), dma->buf_count, buf->idx);
- return 1;
- }
- /* Check for high water mark */
- if (atomic_read(&bl->wfh) && atomic_read(&bl->count)>=bl->high_mark) {
- atomic_set(&bl->wfh, 0);
- if (bl->waiting)
- wakeup(&bl->waiting);
- }
- return 0;
-}
-
-static drm_buf_t *drm_freelist_try(drm_freelist_t *bl)
-{
- unsigned int old;
- unsigned int new;
- char failed;
- drm_buf_t *buf;
- int count = 0;
-
- if (!bl) return NULL;
-
- /* Get buffer */
-/*
- do {
- old = (unsigned int)bl->next;
- if (!old) {
- return NULL;
- }
- new = (unsigned long)bl->next->next;
- _DRM_CAS(&bl->next, old, new, failed);
- if (++count > DRM_LOOPING_LIMIT) {
- DRM_ERROR("Looping\n");
- return NULL;
- }
- } while (failed);
- atomic_dec(&bl->count);
-
- buf = (drm_buf_t *)old;
-*/
- simple_lock(&bl->lock);
- if(!bl->next){
- simple_unlock(&bl->lock);
- return NULL;
- }
- buf = bl->next;
- bl->next = bl->next->next;
- simple_unlock(&bl->lock);
- atomic_dec(&bl->count);
- buf->next = NULL;
- buf->list = DRM_LIST_NONE;
- DRM_DEBUG("%d, count = %d, wfh = %d, w%d, p%d\n",
- buf->idx, atomic_read(&bl->count), atomic_read(&bl->wfh),
- buf->waiting, buf->pending);
- if (buf->waiting || buf->pending) {
- DRM_ERROR("Free buffer %d: w%d, p%d, l%d\n",
- buf->idx, buf->waiting, buf->pending, buf->list);
- }
-
- return buf;
-}
-
-drm_buf_t *drm_freelist_get(drm_freelist_t *bl, int block)
-{
- drm_buf_t *buf = NULL;
- int error;
-
- if (!bl || !bl->initialized) return NULL;
-
- /* Check for low water mark */
- if (atomic_read(&bl->count) <= bl->low_mark) /* Became low */
- atomic_set(&bl->wfh, 1);
- if (atomic_read(&bl->wfh)) {
- DRM_DEBUG("Block = %d, count = %d, wfh = %d\n",
- block, atomic_read(&bl->count),
- atomic_read(&bl->wfh));
- if (block) {
- atomic_inc(&bl->waiting);
- for (;;) {
- if (!atomic_read(&bl->wfh)
- && (buf = drm_freelist_try(bl))) break;
- error = tsleep(&bl->waiting, PZERO|PCATCH,
- "drmfg", 0);
- if (error)
- break;
- }
- atomic_dec(&bl->waiting);
- }
- return buf;
- }
-
- DRM_DEBUG("Count = %d, wfh = %d\n",
- atomic_read(&bl->count), atomic_read(&bl->wfh));
- return drm_freelist_try(bl);
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-06 04:25:11 +0000