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/* i810_bufs.c -- IOCTLs to manage buffers -*- linux-c -*-
* Created: Thu Jan 6 01:47:26 2000 by jhartmann@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 <faith@valinux.com>
* Jeff Hartmann <jhartmann@valinux.com>
*
*/
#define __NO_VERSION__
#include "drmP.h"
#include "i810_drv.h"
#include "linux/un.h"
int i810_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;
agp_offset = request.agp_start;
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;
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 */
}
if(count < 0 || count > 4096)
{
up(&dev->struct_sem);
atomic_dec(&dev->buf_alloc);
return -EINVAL;
}
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;
while(entry->buf_count < 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 = offset;
buf->bus_address = dev->agp->base + 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_private = drm_alloc(sizeof(drm_i810_buf_priv_t),
DRM_MEM_BUFS);
buf->dev_priv_size = sizeof(drm_i810_buf_priv_t);
memset(buf->dev_private, 0, sizeof(drm_i810_buf_priv_t));
#if DRM_DMA_HISTOGRAM
buf->time_queued = 0;
buf->time_dispatched = 0;
buf->time_completed = 0;
buf->time_freed = 0;
#endif
offset = offset + alignment;
entry->buf_count++;
byte_count += PAGE_SIZE << page_order;
DRM_DEBUG("buffer %d @ %p\n",
entry->buf_count, buf->address);
}
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;
atomic_dec(&dev->buf_alloc);
dma->flags = _DRM_DMA_USE_AGP;
return 0;
}
int i810_addbufs(struct inode *inode, struct file *filp, unsigned int cmd,
unsigned long arg)
{
drm_buf_desc_t request;
if (copy_from_user(&request,
(drm_buf_desc_t *)arg,
sizeof(request)))
return -EFAULT;
if(request.flags & _DRM_AGP_BUFFER)
return i810_addbufs_agp(inode, filp, cmd, arg);
else
return -EINVAL;
}
int i810_infobufs(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_info_t request;
int i;
int count;
if (!dma) return -EINVAL;
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_info_t *)arg,
sizeof(request)))
return -EFAULT;
for (i = 0, count = 0; i < DRM_MAX_ORDER+1; i++) {
if (dma->bufs[i].buf_count) ++count;
}
DRM_DEBUG("count = %d\n", count);
if (request.count >= count) {
for (i = 0, count = 0; i < DRM_MAX_ORDER+1; i++) {
if (dma->bufs[i].buf_count) {
if (copy_to_user(&request.list[count].count,
&dma->bufs[i].buf_count,
sizeof(dma->bufs[0]
.buf_count)) ||
copy_to_user(&request.list[count].size,
&dma->bufs[i].buf_size,
sizeof(dma->bufs[0].buf_size)) ||
copy_to_user(&request.list[count].low_mark,
&dma->bufs[i]
.freelist.low_mark,
sizeof(dma->bufs[0]
.freelist.low_mark)) ||
copy_to_user(&request.list[count]
.high_mark,
&dma->bufs[i]
.freelist.high_mark,
sizeof(dma->bufs[0]
.freelist.high_mark)))
return -EFAULT;
DRM_DEBUG("%d %d %d %d %d\n",
i,
dma->bufs[i].buf_count,
dma->bufs[i].buf_size,
dma->bufs[i].freelist.low_mark,
dma->bufs[i].freelist.high_mark);
++count;
}
}
}
request.count = count;
if (copy_to_user((drm_buf_info_t *)arg,
&request,
sizeof(request)))
return -EFAULT;
return 0;
}
int i810_markbufs(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;
int order;
drm_buf_entry_t *entry;
if (!dma) return -EINVAL;
if (copy_from_user(&request,
(drm_buf_desc_t *)arg,
sizeof(request)))
return -EFAULT;
DRM_DEBUG("%d, %d, %d\n",
request.size, request.low_mark, request.high_mark);
order = drm_order(request.size);
if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) return -EINVAL;
entry = &dma->bufs[order];
if (request.low_mark < 0 || request.low_mark > entry->buf_count)
return -EINVAL;
if (request.high_mark < 0 || request.high_mark > entry->buf_count)
return -EINVAL;
entry->freelist.low_mark = request.low_mark;
entry->freelist.high_mark = request.high_mark;
return 0;
}
int i810_freebufs(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_free_t request;
int i;
int idx;
drm_buf_t *buf;
if (!dma) return -EINVAL;
if (copy_from_user(&request,
(drm_buf_free_t *)arg,
sizeof(request)))
return -EFAULT;
DRM_DEBUG("%d\n", request.count);
for (i = 0; i < request.count; i++) {
if (copy_from_user(&idx,
&request.list[i],
sizeof(idx)))
return -EFAULT;
if (idx < 0 || idx >= dma->buf_count) {
DRM_ERROR("Index %d (of %d max)\n",
idx, dma->buf_count - 1);
return -EINVAL;
}
buf = dma->buflist[idx];
if (buf->pid != current->pid) {
DRM_ERROR("Process %d freeing buffer owned by %d\n",
current->pid, buf->pid);
return -EINVAL;
}
drm_free_buffer(dev, buf);
}
return 0;
}
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