From 360475376c5a597caf4a981c934a6b0d783fa94d Mon Sep 17 00:00:00 2001 From: Gareth Hughes Date: Thu, 15 Feb 2001 08:12:14 +0000 Subject: Merge mga-1-0-0-branch into trunk. --- linux/lists.c | 218 ---------------------------------------------------------- 1 file changed, 218 deletions(-) delete mode 100644 linux/lists.c (limited to 'linux/lists.c') diff --git a/linux/lists.c b/linux/lists.c deleted file mode 100644 index 60e66b8f..00000000 --- a/linux/lists.c +++ /dev/null @@ -1,218 +0,0 @@ -/* lists.c -- Buffer list handling routines -*- linux-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) -{ - 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]; - bl->write_lock = SPIN_LOCK_UNLOCKED; - bl->read_lock = SPIN_LOCK_UNLOCKED; - return 0; -} - -int drm_waitlist_destroy(drm_waitlist_t *bl) -{ - 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; - unsigned long flags; - - left = DRM_LEFTCOUNT(bl); - if (!left) { - DRM_ERROR("Overflow while adding buffer %d from pid %d\n", - buf->idx, buf->pid); - return -EINVAL; - } -#if DRM_DMA_HISTOGRAM - buf->time_queued = get_cycles(); -#endif - buf->list = DRM_LIST_WAIT; - - spin_lock_irqsave(&bl->write_lock, flags); - *bl->wp = buf; - if (++bl->wp >= bl->end) bl->wp = bl->bufs; - spin_unlock_irqrestore(&bl->write_lock, flags); - - return 0; -} - -drm_buf_t *drm_waitlist_get(drm_waitlist_t *bl) -{ - drm_buf_t *buf; - unsigned long flags; - - spin_lock_irqsave(&bl->read_lock, flags); - buf = *bl->rp; - if (bl->rp == bl->wp) { - spin_unlock_irqrestore(&bl->read_lock, flags); - return NULL; - } - if (++bl->rp >= bl->end) bl->rp = bl->bufs; - spin_unlock_irqrestore(&bl->read_lock, flags); - - return buf; -} - -int drm_freelist_create(drm_freelist_t *bl, int count) -{ - atomic_set(&bl->count, 0); - bl->next = NULL; - init_waitqueue_head(&bl->waiting); - 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) -{ - 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) -{ - 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); - } - if (!bl) return 1; -#if DRM_DMA_HISTOGRAM - buf->time_freed = get_cycles(); - drm_histogram_compute(dev, buf); -#endif - buf->list = DRM_LIST_FREE; - - spin_lock(&bl->lock); - buf->next = bl->next; - bl->next = buf; - spin_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); - wake_up_interruptible(&bl->waiting); - } - return 0; -} - -static drm_buf_t *drm_freelist_try(drm_freelist_t *bl) -{ - drm_buf_t *buf; - - if (!bl) return NULL; - - /* Get buffer */ - spin_lock(&bl->lock); - if (!bl->next) { - spin_unlock(&bl->lock); - return NULL; - } - buf = bl->next; - bl->next = bl->next->next; - spin_unlock(&bl->lock); - - atomic_dec(&bl->count); - buf->next = NULL; - buf->list = DRM_LIST_NONE; - 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; - DECLARE_WAITQUEUE(entry, current); - - 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)) { - if (block) { - add_wait_queue(&bl->waiting, &entry); - for (;;) { - current->state = TASK_INTERRUPTIBLE; - if (!atomic_read(&bl->wfh) - && (buf = drm_freelist_try(bl))) break; - schedule(); - if (signal_pending(current)) break; - } - current->state = TASK_RUNNING; - remove_wait_queue(&bl->waiting, &entry); - } - return buf; - } - - return drm_freelist_try(bl); -} -- cgit v1.2.3