310 lines
8.4 KiB
C
310 lines
8.4 KiB
C
/* r128_bufs.c -- IOCTLs to manage buffers -*- linux-c -*-
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* Created: Wed Apr 12 16:19:08 2000 by kevin@precisioninsight.com
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*
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* Copyright 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: Kevin E. Martin <martin@valinux.com>
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* Rickard E. (Rik) Faith <faith@valinux.com>
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* Jeff Hartmann <jhartmann@valinux.com>
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*
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*/
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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 "r128_drv.h"
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#include "linux/un.h"
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#if defined(CONFIG_AGP) || defined(CONFIG_AGP_MODULE)
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int r128_addbufs_agp(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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drm_buf_entry_t *entry;
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drm_buf_t *buf;
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unsigned long offset;
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unsigned long agp_offset;
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int count;
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int order;
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int size;
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int alignment;
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int page_order;
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int total;
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int byte_count;
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int i;
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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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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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byte_count = 0;
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agp_offset = dev->agp->base + request.agp_start;
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DRM_DEBUG("count: %d\n", count);
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DRM_DEBUG("order: %d\n", order);
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DRM_DEBUG("size: %d\n", size);
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DRM_DEBUG("agp_offset: %ld\n", agp_offset);
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DRM_DEBUG("alignment: %d\n", alignment);
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DRM_DEBUG("page_order: %d\n", page_order);
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DRM_DEBUG("total: %d\n", total);
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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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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->buf_size = size;
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entry->page_order = page_order;
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offset = 0;
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for (offset = 0;
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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 + offset);
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buf->address = (void *)(agp_offset + 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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buf->dev_priv_size = sizeof(drm_r128_buf_priv_t);
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buf->dev_private = drm_alloc(sizeof(drm_r128_buf_priv_t),
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DRM_MEM_BUFS);
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memset(buf->dev_private, 0, buf->dev_priv_size);
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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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byte_count += PAGE_SIZE << page_order;
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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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DRM_DEBUG("byte_count: %d\n", byte_count);
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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->byte_count += byte_count;
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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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dma->flags = _DRM_DMA_USE_AGP;
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atomic_dec(&dev->buf_alloc);
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return 0;
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}
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#endif
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int r128_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_r128_private_t *dev_priv = dev->dev_private;
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drm_buf_desc_t request;
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if (!dev_priv || dev_priv->is_pci) 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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#if defined(CONFIG_AGP) || defined(CONFIG_AGP_MODULE)
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if (request.flags & _DRM_AGP_BUFFER)
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return r128_addbufs_agp(inode, filp, cmd, arg);
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else
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#endif
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return -EINVAL;
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}
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int r128_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_r128_private_t *dev_priv = dev->dev_private;
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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 || !dev_priv || dev_priv->is_pci) 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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if (dma->flags & _DRM_DMA_USE_AGP) {
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drm_map_t *map;
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map = dev_priv->agp_vertbufs;
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if (!map) {
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retcode = -EINVAL;
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goto done;
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}
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down(¤t->mm->mmap_sem);
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virtual = do_mmap(filp, 0, map->size,
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PROT_READ|PROT_WRITE,
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MAP_SHARED,
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(unsigned long)map->offset);
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up(¤t->mm->mmap_sem);
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} else {
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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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}
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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++) {
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if (copy_to_user(&request.list[i].idx,
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&dma->buflist[i]->idx,
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sizeof(request.list[0].idx))) {
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retcode = -EFAULT;
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goto done;
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}
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if (copy_to_user(&request.list[i].total,
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&dma->buflist[i]->total,
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sizeof(request.list[0].total))) {
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retcode = -EFAULT;
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goto done;
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}
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if (copy_to_user(&request.list[i].used,
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&zero,
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sizeof(zero))) {
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retcode = -EFAULT;
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goto done;
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}
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address = virtual + dma->buflist[i]->offset;
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if (copy_to_user(&request.list[i].address,
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&address,
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sizeof(address))) {
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retcode = -EFAULT;
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goto done;
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}
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}
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}
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done:
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request.count = dma->buf_count;
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DRM_DEBUG("%d buffers, retcode = %d\n", request.count, retcode);
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if (copy_to_user((drm_buf_map_t *)arg,
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&request,
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sizeof(request)))
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return -EFAULT;
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return retcode;
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}
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