+++ /dev/null
-/* r128_bufs.c -- IOCTLs to manage buffers -*- linux-c -*-
- * Created: Wed Apr 12 16:19:08 2000 by kevin@precisioninsight.com
- *
- * Copyright 2000 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: Kevin E. Martin <martin@valinux.com>
- * Rickard E. (Rik) Faith <faith@valinux.com>
- * Jeff Hartmann <jhartmann@valinux.com>
- *
- */
-
-#define __NO_VERSION__
-#include <linux/config.h>
-#include "drmP.h"
-#include "r128_drv.h"
-#include "linux/un.h"
-
-
-#if defined(CONFIG_AGP) || defined(CONFIG_AGP_MODULE)
-int r128_addbufs_agp(struct inode *inode, struct file *filp, unsigned int cmd,
- unsigned long arg)
-{
- drm_file_t *priv = filp->private_data;
- drm_device_t *dev = priv->dev;
- drm_device_dma_t *dma = dev->dma;
- drm_buf_desc_t request;
- drm_buf_entry_t *entry;
- drm_buf_t *buf;
- unsigned long offset;
- unsigned long agp_offset;
- int count;
- int order;
- int size;
- int alignment;
- int page_order;
- int total;
- int byte_count;
- int i;
-
- if (!dma) return -EINVAL;
-
- if (copy_from_user(&request,
- (drm_buf_desc_t *)arg,
- sizeof(request)))
- return -EFAULT;
-
- count = request.count;
- order = drm_order(request.size);
- size = 1 << order;
-
- alignment = (request.flags & _DRM_PAGE_ALIGN) ? PAGE_ALIGN(size):size;
- page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0;
- total = PAGE_SIZE << page_order;
-
- byte_count = 0;
- agp_offset = request.agp_start;
-
- DRM_DEBUG("count: %d\n", count);
- DRM_DEBUG("order: %d\n", order);
- DRM_DEBUG("size: %d\n", size);
- DRM_DEBUG("agp_offset: %ld\n", agp_offset);
- DRM_DEBUG("alignment: %d\n", alignment);
- DRM_DEBUG("page_order: %d\n", page_order);
- DRM_DEBUG("total: %d\n", total);
-
- if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) return -EINVAL;
- if (dev->queue_count) return -EBUSY; /* Not while in use */
-
- spin_lock(&dev->count_lock);
- if (dev->buf_use) {
- spin_unlock(&dev->count_lock);
- return -EBUSY;
- }
- atomic_inc(&dev->buf_alloc);
- spin_unlock(&dev->count_lock);
-
- down(&dev->struct_sem);
- entry = &dma->bufs[order];
- if (entry->buf_count) {
- up(&dev->struct_sem);
- atomic_dec(&dev->buf_alloc);
- return -ENOMEM; /* May only call once for each order */
- }
-
- entry->buflist = drm_alloc(count * sizeof(*entry->buflist),
- DRM_MEM_BUFS);
- if (!entry->buflist) {
- up(&dev->struct_sem);
- atomic_dec(&dev->buf_alloc);
- return -ENOMEM;
- }
- memset(entry->buflist, 0, count * sizeof(*entry->buflist));
-
- entry->buf_size = size;
- entry->page_order = page_order;
- offset = 0;
-
- for (offset = 0;
- entry->buf_count < count;
- offset += alignment, ++entry->buf_count) {
- buf = &entry->buflist[entry->buf_count];
- buf->idx = dma->buf_count + entry->buf_count;
- buf->total = alignment;
- buf->order = order;
- buf->used = 0;
- buf->offset = (dma->byte_count + offset);
- buf->bus_address = agp_offset + offset;
- buf->address = (void *)(agp_offset + offset + dev->agp->base);
- buf->next = NULL;
- buf->waiting = 0;
- buf->pending = 0;
- init_waitqueue_head(&buf->dma_wait);
- buf->pid = 0;
-
- buf->dev_priv_size = sizeof(drm_r128_buf_priv_t);
- buf->dev_private = drm_alloc(sizeof(drm_r128_buf_priv_t),
- DRM_MEM_BUFS);
- memset(buf->dev_private, 0, buf->dev_priv_size);
-
-#if DRM_DMA_HISTOGRAM
- buf->time_queued = 0;
- buf->time_dispatched = 0;
- buf->time_completed = 0;
- buf->time_freed = 0;
-#endif
-
- byte_count += PAGE_SIZE << page_order;
-
- DRM_DEBUG("buffer %d @ %p\n",
- entry->buf_count, buf->address);
- }
-
- DRM_DEBUG("byte_count: %d\n", byte_count);
-
- dma->buflist = drm_realloc(dma->buflist,
- dma->buf_count * sizeof(*dma->buflist),
- (dma->buf_count + entry->buf_count)
- * sizeof(*dma->buflist),
- DRM_MEM_BUFS);
- for (i = dma->buf_count; i < dma->buf_count + entry->buf_count; i++)
- dma->buflist[i] = &entry->buflist[i - dma->buf_count];
-
- dma->buf_count += entry->buf_count;
- dma->byte_count += byte_count;
-
- drm_freelist_create(&entry->freelist, entry->buf_count);
- for (i = 0; i < entry->buf_count; i++) {
- drm_freelist_put(dev, &entry->freelist, &entry->buflist[i]);
- }
-
- up(&dev->struct_sem);
-
- request.count = entry->buf_count;
- request.size = size;
-
- if (copy_to_user((drm_buf_desc_t *)arg,
- &request,
- sizeof(request)))
- return -EFAULT;
-
- dma->flags = _DRM_DMA_USE_AGP;
-
- atomic_dec(&dev->buf_alloc);
- return 0;
-}
-#endif
-
-int r128_addbufs(struct inode *inode, struct file *filp, unsigned int cmd,
- unsigned long arg)
-{
- drm_file_t *priv = filp->private_data;
- drm_device_t *dev = priv->dev;
- drm_r128_private_t *dev_priv = dev->dev_private;
- drm_buf_desc_t request;
-
- if (!dev_priv || dev_priv->is_pci) return -EINVAL;
-
- if (copy_from_user(&request,
- (drm_buf_desc_t *)arg,
- sizeof(request)))
- return -EFAULT;
-
-#if defined(CONFIG_AGP) || defined(CONFIG_AGP_MODULE)
- if (request.flags & _DRM_AGP_BUFFER)
- return r128_addbufs_agp(inode, filp, cmd, arg);
- else
-#endif
- return -EINVAL;
-}
-
-int r128_mapbufs(struct inode *inode, struct file *filp, unsigned int cmd,
- unsigned long arg)
-{
- drm_file_t *priv = filp->private_data;
- drm_device_t *dev = priv->dev;
- drm_r128_private_t *dev_priv = dev->dev_private;
- drm_device_dma_t *dma = dev->dma;
- int retcode = 0;
- const int zero = 0;
- unsigned long virtual;
- unsigned long address;
- drm_buf_map_t request;
- int i;
-
- if (!dma || !dev_priv || dev_priv->is_pci) return -EINVAL;
-
- DRM_DEBUG("\n");
-
- spin_lock(&dev->count_lock);
- if (atomic_read(&dev->buf_alloc)) {
- spin_unlock(&dev->count_lock);
- return -EBUSY;
- }
- ++dev->buf_use; /* Can't allocate more after this call */
- spin_unlock(&dev->count_lock);
-
- if (copy_from_user(&request,
- (drm_buf_map_t *)arg,
- sizeof(request)))
- return -EFAULT;
-
- if (request.count >= dma->buf_count) {
- if (dma->flags & _DRM_DMA_USE_AGP) {
- drm_map_t *map;
-
- map = dev_priv->buffers;
- if (!map) {
- retcode = -EINVAL;
- goto done;
- }
-
- down(¤t->mm->mmap_sem);
- virtual = do_mmap(filp, 0, map->size,
- PROT_READ|PROT_WRITE,
- MAP_SHARED,
- (unsigned long)map->offset);
- up(¤t->mm->mmap_sem);
- } else {
- down(¤t->mm->mmap_sem);
- virtual = do_mmap(filp, 0, dma->byte_count,
- PROT_READ|PROT_WRITE, MAP_SHARED, 0);
- up(¤t->mm->mmap_sem);
- }
- if (virtual > -1024UL) {
- /* Real error */
- retcode = (signed long)virtual;
- goto done;
- }
- request.virtual = (void *)virtual;
-
- 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;
-}
projects / platform / upstream / libdrm.git / commitdiff