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43e2d1e384
included in XFree86 4.3, but includes some fixes. Notable changes include Radeon 8500-9100 support, PCI Radeon/Rage 128 support, transform & lighting support for Radeons, and vblank syncing support for r128, radeon, and mga. The gamma driver was removed due to lack of any users.
243 lines
5.8 KiB
C
243 lines
5.8 KiB
C
/* drm_lists.h -- Buffer list handling routines -*- linux-c -*-
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* Created: Mon Apr 19 20:54:22 1999 by faith@valinux.com
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*
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* Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
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* Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Authors:
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* Rickard E. (Rik) Faith <faith@valinux.com>
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* Gareth Hughes <gareth@valinux.com>
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*
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* $FreeBSD$
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*/
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#include "dev/drm/drmP.h"
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#if __HAVE_DMA_WAITLIST
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int DRM(waitlist_create)(drm_waitlist_t *bl, int count)
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{
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if (bl->count)
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return DRM_ERR( EINVAL );
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bl->bufs = DRM(alloc)((bl->count + 2) * sizeof(*bl->bufs),
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DRM_MEM_BUFLISTS);
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if(!bl->bufs) return DRM_ERR(ENOMEM);
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bzero(bl->bufs, sizeof(*bl->bufs));
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bl->count = count;
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bl->rp = bl->bufs;
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bl->wp = bl->bufs;
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bl->end = &bl->bufs[bl->count+1];
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DRM_SPININIT( bl->write_lock, "writelock" );
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DRM_SPININIT( bl->read_lock, "readlock" );
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return 0;
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}
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int DRM(waitlist_destroy)(drm_waitlist_t *bl)
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{
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if (bl->rp != bl->wp)
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return DRM_ERR( EINVAL );
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if (bl->bufs) DRM(free)(bl->bufs,
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(bl->count + 2) * sizeof(*bl->bufs),
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DRM_MEM_BUFLISTS);
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bl->count = 0;
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bl->bufs = NULL;
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bl->rp = NULL;
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bl->wp = NULL;
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bl->end = NULL;
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DRM_SPINUNINIT( bl->write_lock );
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DRM_SPINUNINIT( bl->read_lock );
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return 0;
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}
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int DRM(waitlist_put)(drm_waitlist_t *bl, drm_buf_t *buf)
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{
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int left;
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int s;
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left = DRM_LEFTCOUNT(bl);
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if (!left) {
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DRM_ERROR("Overflow while adding buffer %d from pid %d\n",
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buf->idx, buf->pid);
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return DRM_ERR( EINVAL );
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}
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#if __HAVE_DMA_HISTOGRAM
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getnanotime(&buf->time_queued);
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#endif
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buf->list = DRM_LIST_WAIT;
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DRM_SPINLOCK(&bl->write_lock);
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s = spldrm();
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*bl->wp = buf;
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if (++bl->wp >= bl->end) bl->wp = bl->bufs;
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splx(s);
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DRM_SPINUNLOCK(&bl->write_lock);
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return 0;
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}
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drm_buf_t *DRM(waitlist_get)(drm_waitlist_t *bl)
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{
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drm_buf_t *buf;
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int s;
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DRM_SPINLOCK(&bl->read_lock);
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s = spldrm();
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buf = *bl->rp;
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if (bl->rp == bl->wp) {
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splx(s);
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DRM_SPINUNLOCK(&bl->read_lock);
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return NULL;
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}
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if (++bl->rp >= bl->end) bl->rp = bl->bufs;
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splx(s);
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DRM_SPINUNLOCK(&bl->read_lock);
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return buf;
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}
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#endif /* __HAVE_DMA_WAITLIST */
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#if __HAVE_DMA_FREELIST
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int DRM(freelist_create)(drm_freelist_t *bl, int count)
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{
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atomic_set(&bl->count, 0);
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bl->next = NULL;
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bl->waiting = 0;
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bl->low_mark = 0;
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bl->high_mark = 0;
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atomic_set(&bl->wfh, 0);
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DRM_SPININIT( bl->lock, "freelistlock" );
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++bl->initialized;
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return 0;
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}
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int DRM(freelist_destroy)(drm_freelist_t *bl)
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{
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atomic_set(&bl->count, 0);
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bl->next = NULL;
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DRM_SPINUNINIT( bl->lock );
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return 0;
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}
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int DRM(freelist_put)(drm_device_t *dev, drm_freelist_t *bl, drm_buf_t *buf)
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{
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drm_device_dma_t *dma = dev->dma;
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if (!dma) {
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DRM_ERROR("No DMA support\n");
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return 1;
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}
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if (buf->waiting || buf->pending || buf->list == DRM_LIST_FREE) {
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DRM_ERROR("Freed buffer %d: w%d, p%d, l%d\n",
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buf->idx, buf->waiting, buf->pending, buf->list);
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}
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if (!bl) return 1;
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#if __HAVE_DMA_HISTOGRAM
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getnanotime(&buf->time_queued);
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DRM(histogram_compute)(dev, buf);
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#endif
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buf->list = DRM_LIST_FREE;
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DRM_SPINLOCK( &bl->lock );
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buf->next = bl->next;
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bl->next = buf;
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DRM_SPINUNLOCK( &bl->lock );
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atomic_inc(&bl->count);
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if (atomic_read(&bl->count) > dma->buf_count) {
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DRM_ERROR("%ld of %d buffers free after addition of %d\n",
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(unsigned long)atomic_read(&bl->count),
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dma->buf_count, buf->idx);
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return 1;
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}
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/* Check for high water mark */
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if (atomic_read(&bl->wfh) && atomic_read(&bl->count)>=bl->high_mark) {
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atomic_set(&bl->wfh, 0);
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DRM_WAKEUP_INT((void *)&bl->waiting);
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}
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return 0;
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}
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static drm_buf_t *DRM(freelist_try)(drm_freelist_t *bl)
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{
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drm_buf_t *buf;
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if (!bl) return NULL;
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/* Get buffer */
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DRM_SPINLOCK(&bl->lock);
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if (!bl->next) {
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DRM_SPINUNLOCK(&bl->lock);
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return NULL;
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}
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buf = bl->next;
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bl->next = bl->next->next;
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DRM_SPINUNLOCK(&bl->lock);
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atomic_dec(&bl->count);
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buf->next = NULL;
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buf->list = DRM_LIST_NONE;
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if (buf->waiting || buf->pending) {
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DRM_ERROR("Free buffer %d: w%d, p%d, l%d\n",
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buf->idx, buf->waiting, buf->pending, buf->list);
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}
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return buf;
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}
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drm_buf_t *DRM(freelist_get)(drm_freelist_t *bl, int block)
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{
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drm_buf_t *buf = NULL;
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int error;
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if (!bl || !bl->initialized) return NULL;
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/* Check for low water mark */
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if (atomic_read(&bl->count) <= bl->low_mark) /* Became low */
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atomic_set(&bl->wfh, 1);
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if (atomic_read(&bl->wfh)) {
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if (block) {
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for (;;) {
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if (!atomic_read(&bl->wfh)
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&& (buf = DRM(freelist_try(bl)))) break;
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error = tsleep((void *)&bl->waiting, PZERO|PCATCH,
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"drmfg", 0);
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if (error)
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break;
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}
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}
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return buf;
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}
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return DRM(freelist_try)(bl);
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}
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#endif /* __HAVE_DMA_FREELIST */
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