539 lines
14 KiB
C
539 lines
14 KiB
C
/* bufs.c -- IOCTLs to manage buffers -*- linux-c -*-
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* Created: Tue Feb 2 08:37:54 1999 by faith@precisioninsight.com
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*
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* Copyright 1999, 2000 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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* PRECISION INSIGHT 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 OTHER
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* 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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*
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*/
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/* $XFree86: xc/programs/Xserver/hw/xfree86/os-support/linux/drm/kernel/bufs.c,v 1.8 2000/08/28 02:43:14 tsi Exp $ */
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#define __NO_VERSION__
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#include <linux/config.h>
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#include "drmP.h"
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#include "linux/un.h"
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/* Compute order. Can be made faster. */
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int drm_order(unsigned long size)
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{
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int order;
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unsigned long tmp;
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for (order = 0, tmp = size; tmp >>= 1; ++order);
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if (size & ~(1 << order)) ++order;
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return order;
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}
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int drm_addmap(struct inode *inode, struct file *filp, unsigned int cmd,
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unsigned long arg)
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{
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drm_file_t *priv = filp->private_data;
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drm_device_t *dev = priv->dev;
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drm_map_t *map;
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if (!(filp->f_mode & 3)) return -EACCES; /* Require read/write */
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map = drm_alloc(sizeof(*map), DRM_MEM_MAPS);
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if (!map) return -ENOMEM;
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if (copy_from_user(map, (drm_map_t *)arg, sizeof(*map))) {
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drm_free(map, sizeof(*map), DRM_MEM_MAPS);
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return -EFAULT;
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}
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DRM_DEBUG("offset = 0x%08lx, size = 0x%08lx, type = %d\n",
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map->offset, map->size, map->type);
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if ((map->offset & (~PAGE_MASK)) || (map->size & (~PAGE_MASK))) {
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drm_free(map, sizeof(*map), DRM_MEM_MAPS);
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return -EINVAL;
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}
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map->mtrr = -1;
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map->handle = 0;
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switch (map->type) {
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case _DRM_REGISTERS:
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case _DRM_FRAME_BUFFER:
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#ifndef __sparc__
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if (map->offset + map->size < map->offset
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|| map->offset < virt_to_phys(high_memory)) {
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drm_free(map, sizeof(*map), DRM_MEM_MAPS);
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return -EINVAL;
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}
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#endif
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#ifdef CONFIG_MTRR
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if (map->type == _DRM_FRAME_BUFFER
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|| (map->flags & _DRM_WRITE_COMBINING)) {
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map->mtrr = mtrr_add(map->offset, map->size,
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MTRR_TYPE_WRCOMB, 1);
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}
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#endif
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map->handle = drm_ioremap(map->offset, map->size);
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break;
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case _DRM_SHM:
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map->handle = (void *)drm_alloc_pages(drm_order(map->size)
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- PAGE_SHIFT,
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DRM_MEM_SAREA);
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DRM_DEBUG("%ld %d %p\n", map->size, drm_order(map->size),
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map->handle);
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if (!map->handle) {
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drm_free(map, sizeof(*map), DRM_MEM_MAPS);
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return -ENOMEM;
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}
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map->offset = (unsigned long)map->handle;
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if (map->flags & _DRM_CONTAINS_LOCK) {
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dev->lock.hw_lock = map->handle; /* Pointer to lock */
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}
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break;
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#if defined(CONFIG_AGP) || defined(CONFIG_AGP_MODULE)
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case _DRM_AGP:
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map->offset = map->offset + dev->agp->base;
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break;
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#endif
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default:
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drm_free(map, sizeof(*map), DRM_MEM_MAPS);
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return -EINVAL;
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}
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down(&dev->struct_sem);
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if (dev->maplist) {
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++dev->map_count;
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dev->maplist = drm_realloc(dev->maplist,
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(dev->map_count-1)
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* sizeof(*dev->maplist),
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dev->map_count
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* sizeof(*dev->maplist),
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DRM_MEM_MAPS);
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} else {
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dev->map_count = 1;
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dev->maplist = drm_alloc(dev->map_count*sizeof(*dev->maplist),
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DRM_MEM_MAPS);
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}
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dev->maplist[dev->map_count-1] = map;
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up(&dev->struct_sem);
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if (copy_to_user((drm_map_t *)arg, map, sizeof(*map)))
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return -EFAULT;
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if (map->type != _DRM_SHM) {
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if (copy_to_user(&((drm_map_t *)arg)->handle,
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&map->offset,
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sizeof(map->offset)))
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return -EFAULT;
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}
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return 0;
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}
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int drm_addbufs(struct inode *inode, struct file *filp, unsigned int cmd,
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unsigned long arg)
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{
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drm_file_t *priv = filp->private_data;
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drm_device_t *dev = priv->dev;
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drm_device_dma_t *dma = dev->dma;
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drm_buf_desc_t request;
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int count;
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int order;
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int size;
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int total;
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int page_order;
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drm_buf_entry_t *entry;
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unsigned long page;
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drm_buf_t *buf;
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int alignment;
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unsigned long offset;
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int i;
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int byte_count;
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int page_count;
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if (!dma) return -EINVAL;
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if (copy_from_user(&request,
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(drm_buf_desc_t *)arg,
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sizeof(request)))
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return -EFAULT;
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count = request.count;
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order = drm_order(request.size);
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size = 1 << order;
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DRM_DEBUG("count = %d, size = %d (%d), order = %d, queue_count = %d\n",
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request.count, request.size, size, order, dev->queue_count);
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if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) return -EINVAL;
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if (dev->queue_count) return -EBUSY; /* Not while in use */
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alignment = (request.flags & _DRM_PAGE_ALIGN) ? PAGE_ALIGN(size):size;
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page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0;
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total = PAGE_SIZE << page_order;
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spin_lock(&dev->count_lock);
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if (dev->buf_use) {
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spin_unlock(&dev->count_lock);
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return -EBUSY;
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}
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atomic_inc(&dev->buf_alloc);
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spin_unlock(&dev->count_lock);
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down(&dev->struct_sem);
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entry = &dma->bufs[order];
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if (entry->buf_count) {
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up(&dev->struct_sem);
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atomic_dec(&dev->buf_alloc);
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return -ENOMEM; /* May only call once for each order */
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}
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entry->buflist = drm_alloc(count * sizeof(*entry->buflist),
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DRM_MEM_BUFS);
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if (!entry->buflist) {
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up(&dev->struct_sem);
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atomic_dec(&dev->buf_alloc);
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return -ENOMEM;
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}
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memset(entry->buflist, 0, count * sizeof(*entry->buflist));
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entry->seglist = drm_alloc(count * sizeof(*entry->seglist),
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DRM_MEM_SEGS);
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if (!entry->seglist) {
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drm_free(entry->buflist,
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count * sizeof(*entry->buflist),
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DRM_MEM_BUFS);
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up(&dev->struct_sem);
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atomic_dec(&dev->buf_alloc);
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return -ENOMEM;
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}
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memset(entry->seglist, 0, count * sizeof(*entry->seglist));
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dma->pagelist = drm_realloc(dma->pagelist,
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dma->page_count * sizeof(*dma->pagelist),
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(dma->page_count + (count << page_order))
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* sizeof(*dma->pagelist),
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DRM_MEM_PAGES);
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DRM_DEBUG("pagelist: %d entries\n",
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dma->page_count + (count << page_order));
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entry->buf_size = size;
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entry->page_order = page_order;
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byte_count = 0;
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page_count = 0;
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while (entry->buf_count < count) {
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if (!(page = drm_alloc_pages(page_order, DRM_MEM_DMA))) break;
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entry->seglist[entry->seg_count++] = page;
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for (i = 0; i < (1 << page_order); i++) {
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DRM_DEBUG("page %d @ 0x%08lx\n",
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dma->page_count + page_count,
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page + PAGE_SIZE * i);
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dma->pagelist[dma->page_count + page_count++]
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= page + PAGE_SIZE * i;
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}
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for (offset = 0;
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offset + size <= total && entry->buf_count < count;
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offset += alignment, ++entry->buf_count) {
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buf = &entry->buflist[entry->buf_count];
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buf->idx = dma->buf_count + entry->buf_count;
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buf->total = alignment;
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buf->order = order;
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buf->used = 0;
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buf->offset = (dma->byte_count + byte_count + offset);
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buf->address = (void *)(page + offset);
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buf->next = NULL;
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buf->waiting = 0;
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buf->pending = 0;
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init_waitqueue_head(&buf->dma_wait);
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buf->pid = 0;
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#if DRM_DMA_HISTOGRAM
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buf->time_queued = 0;
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buf->time_dispatched = 0;
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buf->time_completed = 0;
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buf->time_freed = 0;
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#endif
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DRM_DEBUG("buffer %d @ %p\n",
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entry->buf_count, buf->address);
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}
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byte_count += PAGE_SIZE << page_order;
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}
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dma->buflist = drm_realloc(dma->buflist,
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dma->buf_count * sizeof(*dma->buflist),
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(dma->buf_count + entry->buf_count)
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* sizeof(*dma->buflist),
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DRM_MEM_BUFS);
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for (i = dma->buf_count; i < dma->buf_count + entry->buf_count; i++)
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dma->buflist[i] = &entry->buflist[i - dma->buf_count];
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dma->buf_count += entry->buf_count;
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dma->seg_count += entry->seg_count;
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dma->page_count += entry->seg_count << page_order;
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dma->byte_count += PAGE_SIZE * (entry->seg_count << page_order);
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drm_freelist_create(&entry->freelist, entry->buf_count);
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for (i = 0; i < entry->buf_count; i++) {
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drm_freelist_put(dev, &entry->freelist, &entry->buflist[i]);
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}
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up(&dev->struct_sem);
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request.count = entry->buf_count;
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request.size = size;
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if (copy_to_user((drm_buf_desc_t *)arg,
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&request,
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sizeof(request)))
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return -EFAULT;
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atomic_dec(&dev->buf_alloc);
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return 0;
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}
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int drm_infobufs(struct inode *inode, struct file *filp, unsigned int cmd,
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unsigned long arg)
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{
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drm_file_t *priv = filp->private_data;
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drm_device_t *dev = priv->dev;
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drm_device_dma_t *dma = dev->dma;
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drm_buf_info_t request;
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int i;
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int count;
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if (!dma) return -EINVAL;
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spin_lock(&dev->count_lock);
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if (atomic_read(&dev->buf_alloc)) {
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spin_unlock(&dev->count_lock);
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return -EBUSY;
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}
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++dev->buf_use; /* Can't allocate more after this call */
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spin_unlock(&dev->count_lock);
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if (copy_from_user(&request,
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(drm_buf_info_t *)arg,
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sizeof(request)))
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return -EFAULT;
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for (i = 0, count = 0; i < DRM_MAX_ORDER+1; i++) {
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if (dma->bufs[i].buf_count) ++count;
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}
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DRM_DEBUG("count = %d\n", count);
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if (request.count >= count) {
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for (i = 0, count = 0; i < DRM_MAX_ORDER+1; i++) {
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if (dma->bufs[i].buf_count) {
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if (copy_to_user(&request.list[count].count,
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&dma->bufs[i].buf_count,
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sizeof(dma->bufs[0]
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.buf_count)) ||
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copy_to_user(&request.list[count].size,
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&dma->bufs[i].buf_size,
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sizeof(dma->bufs[0].buf_size)) ||
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copy_to_user(&request.list[count].low_mark,
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&dma->bufs[i]
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.freelist.low_mark,
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sizeof(dma->bufs[0]
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.freelist.low_mark)) ||
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copy_to_user(&request.list[count]
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.high_mark,
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&dma->bufs[i]
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.freelist.high_mark,
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sizeof(dma->bufs[0]
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.freelist.high_mark)))
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return -EFAULT;
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DRM_DEBUG("%d %d %d %d %d\n",
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i,
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dma->bufs[i].buf_count,
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dma->bufs[i].buf_size,
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dma->bufs[i].freelist.low_mark,
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dma->bufs[i].freelist.high_mark);
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++count;
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}
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}
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}
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request.count = count;
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if (copy_to_user((drm_buf_info_t *)arg,
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&request,
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sizeof(request)))
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return -EFAULT;
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return 0;
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}
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int drm_markbufs(struct inode *inode, struct file *filp, unsigned int cmd,
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unsigned long arg)
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{
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drm_file_t *priv = filp->private_data;
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drm_device_t *dev = priv->dev;
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drm_device_dma_t *dma = dev->dma;
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drm_buf_desc_t request;
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int order;
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drm_buf_entry_t *entry;
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if (!dma) return -EINVAL;
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if (copy_from_user(&request,
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(drm_buf_desc_t *)arg,
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sizeof(request)))
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return -EFAULT;
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DRM_DEBUG("%d, %d, %d\n",
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request.size, request.low_mark, request.high_mark);
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order = drm_order(request.size);
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if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) return -EINVAL;
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entry = &dma->bufs[order];
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if (request.low_mark < 0 || request.low_mark > entry->buf_count)
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return -EINVAL;
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if (request.high_mark < 0 || request.high_mark > entry->buf_count)
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return -EINVAL;
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entry->freelist.low_mark = request.low_mark;
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entry->freelist.high_mark = request.high_mark;
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return 0;
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}
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int drm_freebufs(struct inode *inode, struct file *filp, unsigned int cmd,
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unsigned long arg)
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{
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drm_file_t *priv = filp->private_data;
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drm_device_t *dev = priv->dev;
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drm_device_dma_t *dma = dev->dma;
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drm_buf_free_t request;
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int i;
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int idx;
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drm_buf_t *buf;
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if (!dma) return -EINVAL;
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if (copy_from_user(&request,
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(drm_buf_free_t *)arg,
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sizeof(request)))
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return -EFAULT;
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DRM_DEBUG("%d\n", request.count);
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for (i = 0; i < request.count; i++) {
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if (copy_from_user(&idx,
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&request.list[i],
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sizeof(idx)))
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return -EFAULT;
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if (idx < 0 || idx >= dma->buf_count) {
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DRM_ERROR("Index %d (of %d max)\n",
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idx, dma->buf_count - 1);
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return -EINVAL;
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}
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buf = dma->buflist[idx];
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if (buf->pid != current->pid) {
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DRM_ERROR("Process %d freeing buffer owned by %d\n",
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current->pid, buf->pid);
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return -EINVAL;
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}
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drm_free_buffer(dev, buf);
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}
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return 0;
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}
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int drm_mapbufs(struct inode *inode, struct file *filp, unsigned int cmd,
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unsigned long arg)
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{
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drm_file_t *priv = filp->private_data;
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drm_device_t *dev = priv->dev;
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drm_device_dma_t *dma = dev->dma;
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int retcode = 0;
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const int zero = 0;
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unsigned long virtual;
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unsigned long address;
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drm_buf_map_t request;
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int i;
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if (!dma) return -EINVAL;
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DRM_DEBUG("\n");
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spin_lock(&dev->count_lock);
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if (atomic_read(&dev->buf_alloc)) {
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spin_unlock(&dev->count_lock);
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return -EBUSY;
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}
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++dev->buf_use; /* Can't allocate more after this call */
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spin_unlock(&dev->count_lock);
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if (copy_from_user(&request,
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(drm_buf_map_t *)arg,
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sizeof(request)))
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return -EFAULT;
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if (request.count >= dma->buf_count) {
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down(¤t->mm->mmap_sem);
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virtual = do_mmap(filp, 0, dma->byte_count,
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PROT_READ|PROT_WRITE, MAP_SHARED, 0);
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up(¤t->mm->mmap_sem);
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if (virtual > -1024UL) {
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/* Real error */
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retcode = (signed long)virtual;
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goto done;
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}
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request.virtual = (void *)virtual;
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for (i = 0; i < dma->buf_count; i++) {
|
|
if (copy_to_user(&request.list[i].idx,
|
|
&dma->buflist[i]->idx,
|
|
sizeof(request.list[0].idx))) {
|
|
retcode = -EFAULT;
|
|
goto done;
|
|
}
|
|
if (copy_to_user(&request.list[i].total,
|
|
&dma->buflist[i]->total,
|
|
sizeof(request.list[0].total))) {
|
|
retcode = -EFAULT;
|
|
goto done;
|
|
}
|
|
if (copy_to_user(&request.list[i].used,
|
|
&zero,
|
|
sizeof(zero))) {
|
|
retcode = -EFAULT;
|
|
goto done;
|
|
}
|
|
address = virtual + dma->buflist[i]->offset;
|
|
if (copy_to_user(&request.list[i].address,
|
|
&address,
|
|
sizeof(address))) {
|
|
retcode = -EFAULT;
|
|
goto done;
|
|
}
|
|
}
|
|
}
|
|
done:
|
|
request.count = dma->buf_count;
|
|
DRM_DEBUG("%d buffers, retcode = %d\n", request.count, retcode);
|
|
|
|
if (copy_to_user((drm_buf_map_t *)arg,
|
|
&request,
|
|
sizeof(request)))
|
|
return -EFAULT;
|
|
|
|
return retcode;
|
|
}
|