From 44aa4d6297874022a4f5a49ea24f2d052584d3dc Mon Sep 17 00:00:00 2001 From: David Dawes Date: Sun, 27 Jan 2002 20:05:42 +0000 Subject: First pass merge of XFree86 4.2.0 import. --- bsd/drm/lists.c | 278 -------------------------------------------------------- 1 file changed, 278 deletions(-) delete mode 100644 bsd/drm/lists.c (limited to 'bsd/drm/lists.c') 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 - * - */ - -#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); -} -- cgit v1.2.3