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freebsd-skq/sys/dev/drm/drm_bufs.h
phk 068a6e0ac2 Neuter DRM(mapbufs) until somebody finds time to try to fix it. 
It is _never_ OK to find a vnode from a struct cdev because you have
no way of telling if you get the right one.  You might be in jail or
chroot for instance.
2005-02-22 13:56:15 +00:00

978 lines
25 KiB
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/* drm_bufs.h -- Generic buffer template -*- linux-c -*-
* Created: Thu Nov 23 03:10:50 2000 by gareth@valinux.com */
/*-
* Copyright 1999, 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
* VA LINUX SYSTEMS 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>
* Gareth Hughes <gareth@valinux.com>
*
* $FreeBSD$
*/
#include "dev/drm/drmP.h"
#ifndef __HAVE_PCI_DMA
#define __HAVE_PCI_DMA 0
#endif
#ifndef __HAVE_SG
#define __HAVE_SG 0
#endif
#ifndef DRIVER_BUF_PRIV_T
#define DRIVER_BUF_PRIV_T u32
#endif
#ifndef DRIVER_AGP_BUFFERS_MAP
#if __HAVE_AGP && __HAVE_DMA
#error "You must define DRIVER_AGP_BUFFERS_MAP()"
#else
#define DRIVER_AGP_BUFFERS_MAP( dev ) NULL
#endif
#endif
/*
* Compute order. Can be made faster.
*/
int DRM(order)( unsigned long size )
{
int order;
unsigned long tmp;
for ( order = 0, tmp = size ; tmp >>= 1 ; ++order );
if ( size & ~(1 << order) )
++order;
return order;
}
int DRM(addmap)( DRM_IOCTL_ARGS )
{
DRM_DEVICE;
drm_map_t request;
drm_local_map_t *map;
drm_map_list_entry_t *list;
if (!(dev->flags & (FREAD|FWRITE)))
return DRM_ERR(EACCES); /* Require read/write */
DRM_COPY_FROM_USER_IOCTL( request, (drm_map_t *)data, sizeof(drm_map_t) );
map = (drm_local_map_t *) DRM(alloc)( sizeof(*map), DRM_MEM_MAPS );
if ( !map )
return DRM_ERR(ENOMEM);
map->offset = request.offset;
map->size = request.size;
map->type = request.type;
map->flags = request.flags;
map->mtrr = 0;
map->handle = 0;
/* Only allow shared memory to be removable since we only keep enough
* book keeping information about shared memory to allow for removal
* when processes fork.
*/
if ( (map->flags & _DRM_REMOVABLE) && map->type != _DRM_SHM ) {
DRM(free)( map, sizeof(*map), DRM_MEM_MAPS );
return DRM_ERR(EINVAL);
}
DRM_DEBUG( "offset = 0x%08lx, size = 0x%08lx, type = %d\n",
map->offset, map->size, map->type );
if ( (map->offset & PAGE_MASK) || (map->size & PAGE_MASK) ) {
DRM(free)( map, sizeof(*map), DRM_MEM_MAPS );
return DRM_ERR(EINVAL);
}
if (map->offset + map->size < map->offset) {
DRM(free)(map, sizeof(*map), DRM_MEM_MAPS);
return DRM_ERR(EINVAL);
}
switch ( map->type ) {
case _DRM_REGISTERS:
DRM_IOREMAP(map, dev);
if (!(map->flags & _DRM_WRITE_COMBINING))
break;
/* FALLTHROUGH */
case _DRM_FRAME_BUFFER:
#if __REALLY_HAVE_MTRR
if (DRM(mtrr_add)(map->offset, map->size, DRM_MTRR_WC) == 0)
map->mtrr = 1;
#endif
break;
case _DRM_SHM:
map->handle = (void *)DRM(alloc)(map->size, DRM_MEM_SAREA);
DRM_DEBUG( "%lu %d %p\n",
map->size, DRM(order)( map->size ), map->handle );
if ( !map->handle ) {
DRM(free)( map, sizeof(*map), DRM_MEM_MAPS );
return DRM_ERR(ENOMEM);
}
map->offset = (unsigned long)map->handle;
if ( map->flags & _DRM_CONTAINS_LOCK ) {
/* Prevent a 2nd X Server from creating a 2nd lock */
DRM_LOCK();
if (dev->lock.hw_lock != NULL) {
DRM_UNLOCK();
DRM(free)(map->handle, map->size,
DRM_MEM_SAREA);
DRM(free)(map, sizeof(*map), DRM_MEM_MAPS);
return DRM_ERR(EBUSY);
}
dev->lock.hw_lock = map->handle; /* Pointer to lock */
DRM_UNLOCK();
}
break;
#if __REALLY_HAVE_AGP
case _DRM_AGP:
map->offset += dev->agp->base;
map->mtrr = dev->agp->mtrr; /* for getmap */
break;
#endif
case _DRM_SCATTER_GATHER:
if (!dev->sg) {
DRM(free)(map, sizeof(*map), DRM_MEM_MAPS);
return DRM_ERR(EINVAL);
}
map->offset = map->offset + dev->sg->handle;
break;
default:
DRM(free)( map, sizeof(*map), DRM_MEM_MAPS );
return DRM_ERR(EINVAL);
}
list = DRM(calloc)(1, sizeof(*list), DRM_MEM_MAPS);
if (list == NULL) {
DRM(free)(map, sizeof(*map), DRM_MEM_MAPS);
return DRM_ERR(EINVAL);
}
list->map = map;
DRM_LOCK();
TAILQ_INSERT_TAIL(dev->maplist, list, link);
DRM_UNLOCK();
request.offset = map->offset;
request.size = map->size;
request.type = map->type;
request.flags = map->flags;
request.mtrr = map->mtrr;
request.handle = map->handle;
if ( request.type != _DRM_SHM ) {
request.handle = (void *)request.offset;
}
DRM_COPY_TO_USER_IOCTL( (drm_map_t *)data, request, sizeof(drm_map_t) );
return 0;
}
/* Remove a map private from list and deallocate resources if the mapping
* isn't in use.
*/
int DRM(rmmap)( DRM_IOCTL_ARGS )
{
DRM_DEVICE;
drm_map_list_entry_t *list;
drm_local_map_t *map;
drm_map_t request;
DRM_COPY_FROM_USER_IOCTL( request, (drm_map_t *)data, sizeof(request) );
DRM_LOCK();
TAILQ_FOREACH(list, dev->maplist, link) {
map = list->map;
if (map->handle == request.handle &&
map->flags & _DRM_REMOVABLE)
break;
}
/* No match found. */
if (list == NULL) {
DRM_UNLOCK();
return DRM_ERR(EINVAL);
}
TAILQ_REMOVE(dev->maplist, list, link);
DRM_UNLOCK();
DRM(free)(list, sizeof(*list), DRM_MEM_MAPS);
switch (map->type) {
case _DRM_REGISTERS:
case _DRM_FRAME_BUFFER:
#if __REALLY_HAVE_MTRR
if (map->mtrr) {
int __unused retcode;
retcode = DRM(mtrr_del)(map->offset, map->size,
DRM_MTRR_WC);
DRM_DEBUG("mtrr_del = %d\n", retcode);
}
#endif
DRM(ioremapfree)(map);
break;
case _DRM_SHM:
DRM(free)(map->handle, map->size, DRM_MEM_SAREA);
break;
case _DRM_AGP:
case _DRM_SCATTER_GATHER:
break;
}
DRM(free)(map, sizeof(*map), DRM_MEM_MAPS);
return 0;
}
#if __HAVE_DMA
static void DRM(cleanup_buf_error)(drm_device_t *dev, drm_buf_entry_t *entry)
{
int i;
#if __HAVE_PCI_DMA
if (entry->seg_count) {
for (i = 0; i < entry->seg_count; i++) {
if (entry->seglist[i] != 0)
DRM(pci_free)(dev, entry->buf_size,
(void *)entry->seglist[i],
entry->seglist_bus[i]);
}
DRM(free)(entry->seglist,
entry->seg_count *
sizeof(*entry->seglist),
DRM_MEM_SEGS);
DRM(free)(entry->seglist_bus, entry->seg_count *
sizeof(*entry->seglist_bus), DRM_MEM_SEGS);
entry->seg_count = 0;
}
#endif /* __HAVE_PCI_DMA */
if (entry->buf_count) {
for (i = 0; i < entry->buf_count; i++) {
DRM(free)(entry->buflist[i].dev_private,
entry->buflist[i].dev_priv_size, DRM_MEM_BUFS);
}
DRM(free)(entry->buflist,
entry->buf_count *
sizeof(*entry->buflist),
DRM_MEM_BUFS);
entry->buf_count = 0;
}
}
#if __REALLY_HAVE_AGP
static int DRM(addbufs_agp)(drm_device_t *dev, drm_buf_desc_t *request)
{
drm_device_dma_t *dma = dev->dma;
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;
drm_buf_t **temp_buflist;
count = request->count;
order = DRM(order)(request->size);
size = 1 << order;
alignment = (request->flags & _DRM_PAGE_ALIGN)
? round_page(size) : size;
page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0;
total = PAGE_SIZE << page_order;
byte_count = 0;
agp_offset = dev->agp->base + 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: 0x%lx\n", agp_offset );
DRM_DEBUG( "alignment: %d\n", alignment );
DRM_DEBUG( "page_order: %d\n", page_order );
DRM_DEBUG( "total: %d\n", total );
entry = &dma->bufs[order];
entry->buflist = DRM(alloc)( count * sizeof(*entry->buflist),
DRM_MEM_BUFS );
if ( !entry->buflist ) {
return DRM_ERR(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 = (dma->byte_count + offset);
buf->bus_address = agp_offset + offset;
buf->address = (void *)(agp_offset + offset);
buf->next = NULL;
buf->pending = 0;
buf->filp = NULL;
buf->dev_priv_size = sizeof(DRIVER_BUF_PRIV_T);
buf->dev_private = DRM(calloc)(1, buf->dev_priv_size,
DRM_MEM_BUFS);
if (buf->dev_private == NULL) {
/* Set count correctly so we free the proper amount. */
entry->buf_count = count;
DRM(cleanup_buf_error)(dev, entry);
return DRM_ERR(ENOMEM);
}
offset += alignment;
entry->buf_count++;
byte_count += PAGE_SIZE << page_order;
}
DRM_DEBUG( "byte_count: %d\n", byte_count );
temp_buflist = DRM(realloc)( dma->buflist,
dma->buf_count * sizeof(*dma->buflist),
(dma->buf_count + entry->buf_count)
* sizeof(*dma->buflist),
DRM_MEM_BUFS );
if (temp_buflist == NULL) {
/* Free the entry because it isn't valid */
DRM(cleanup_buf_error)(dev, entry);
return DRM_ERR(ENOMEM);
}
dma->buflist = temp_buflist;
for ( i = 0 ; i < entry->buf_count ; i++ ) {
dma->buflist[i + dma->buf_count] = &entry->buflist[i];
}
dma->buf_count += entry->buf_count;
dma->byte_count += byte_count;
DRM_DEBUG( "dma->buf_count : %d\n", dma->buf_count );
DRM_DEBUG( "entry->buf_count : %d\n", entry->buf_count );
request->count = entry->buf_count;
request->size = size;
dma->flags = _DRM_DMA_USE_AGP;
return 0;
}
#endif /* __REALLY_HAVE_AGP */
#if __HAVE_PCI_DMA
static int DRM(addbufs_pci)(drm_device_t *dev, drm_buf_desc_t *request)
{
drm_device_dma_t *dma = dev->dma;
int count;
int order;
int size;
int total;
int page_order;
drm_buf_entry_t *entry;
vm_offset_t vaddr;
drm_buf_t *buf;
int alignment;
unsigned long offset;
int i;
int byte_count;
int page_count;
unsigned long *temp_pagelist;
drm_buf_t **temp_buflist;
dma_addr_t bus_addr;
count = request->count;
order = DRM(order)(request->size);
size = 1 << order;
DRM_DEBUG( "count=%d, size=%d (%d), order=%d\n",
request->count, request->size, size, order );
alignment = (request->flags & _DRM_PAGE_ALIGN)
? round_page(size) : size;
page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0;
total = PAGE_SIZE << page_order;
entry = &dma->bufs[order];
entry->buflist = DRM(alloc)(count * sizeof(*entry->buflist),
DRM_MEM_BUFS);
entry->seglist = DRM(alloc)(count * sizeof(*entry->seglist),
DRM_MEM_SEGS);
entry->seglist_bus = DRM(alloc)(count * sizeof(*entry->seglist_bus),
DRM_MEM_SEGS);
/* Keep the original pagelist until we know all the allocations
* have succeeded
*/
temp_pagelist = DRM(alloc)((dma->page_count + (count << page_order)) *
sizeof(*dma->pagelist), DRM_MEM_PAGES);
if (entry->buflist == NULL || entry->seglist == NULL ||
temp_pagelist == NULL) {
DRM(free)(entry->buflist, count * sizeof(*entry->buflist),
DRM_MEM_BUFS);
DRM(free)(entry->seglist, count * sizeof(*entry->seglist),
DRM_MEM_SEGS);
DRM(free)(entry->seglist_bus, count *
sizeof(*entry->seglist_bus), DRM_MEM_SEGS);
return DRM_ERR(ENOMEM);
}
bzero(entry->buflist, count * sizeof(*entry->buflist));
bzero(entry->seglist, count * sizeof(*entry->seglist));
memcpy(temp_pagelist, dma->pagelist, dma->page_count *
sizeof(*dma->pagelist));
DRM_DEBUG( "pagelist: %d entries\n",
dma->page_count + (count << page_order) );
entry->buf_size = size;
entry->page_order = page_order;
byte_count = 0;
page_count = 0;
while ( entry->buf_count < count ) {
vaddr = (vm_offset_t) DRM(pci_alloc)(dev, size, alignment,
0xfffffffful, &bus_addr);
if (vaddr == 0) {
/* Set count correctly so we free the proper amount. */
entry->buf_count = count;
entry->seg_count = count;
DRM(cleanup_buf_error)(dev, entry);
DRM(free)(temp_pagelist, (dma->page_count +
(count << page_order)) * sizeof(*dma->pagelist),
DRM_MEM_PAGES);
return DRM_ERR(ENOMEM);
}
entry->seglist_bus[entry->seg_count] = bus_addr;
entry->seglist[entry->seg_count++] = vaddr;
for ( i = 0 ; i < (1 << page_order) ; i++ ) {
DRM_DEBUG( "page %d @ 0x%08lx\n",
dma->page_count + page_count,
(long)vaddr + PAGE_SIZE * i );
temp_pagelist[dma->page_count + page_count++] =
vaddr + PAGE_SIZE * i;
}
for ( offset = 0 ;
offset + size <= total && 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 + byte_count + offset);
buf->address = (void *)(vaddr + offset);
buf->bus_address = bus_addr + offset;
buf->next = NULL;
buf->pending = 0;
buf->filp = NULL;
buf->dev_priv_size = sizeof(DRIVER_BUF_PRIV_T);
buf->dev_private = DRM(alloc)(sizeof(DRIVER_BUF_PRIV_T),
DRM_MEM_BUFS);
if (buf->dev_private == NULL) {
/* Set count correctly so we free the proper amount. */
entry->buf_count = count;
entry->seg_count = count;
DRM(cleanup_buf_error)(dev, entry);
DRM(free)(temp_pagelist, (dma->page_count +
(count << page_order)) *
sizeof(*dma->pagelist), DRM_MEM_PAGES );
return DRM_ERR(ENOMEM);
}
bzero(buf->dev_private, buf->dev_priv_size);
DRM_DEBUG( "buffer %d @ %p\n",
entry->buf_count, buf->address );
}
byte_count += PAGE_SIZE << page_order;
}
temp_buflist = DRM(realloc)( dma->buflist,
dma->buf_count * sizeof(*dma->buflist),
(dma->buf_count + entry->buf_count)
* sizeof(*dma->buflist),
DRM_MEM_BUFS );
if (temp_buflist == NULL) {
/* Free the entry because it isn't valid */
DRM(cleanup_buf_error)(dev, entry);
DRM(free)(temp_pagelist, (dma->page_count +
(count << page_order)) * sizeof(*dma->pagelist),
DRM_MEM_PAGES);
return DRM_ERR(ENOMEM);
}
dma->buflist = temp_buflist;
for ( i = 0 ; i < entry->buf_count ; i++ ) {
dma->buflist[i + dma->buf_count] = &entry->buflist[i];
}
/* No allocations failed, so now we can replace the orginal pagelist
* with the new one.
*/
DRM(free)(dma->pagelist, dma->page_count * sizeof(*dma->pagelist),
DRM_MEM_PAGES);
dma->pagelist = temp_pagelist;
dma->buf_count += entry->buf_count;
dma->seg_count += entry->seg_count;
dma->page_count += entry->seg_count << page_order;
dma->byte_count += PAGE_SIZE * (entry->seg_count << page_order);
request->count = entry->buf_count;
request->size = size;
return 0;
}
#endif /* __HAVE_PCI_DMA */
#if __REALLY_HAVE_SG
static int DRM(addbufs_sg)(drm_device_t *dev, drm_buf_desc_t *request)
{
drm_device_dma_t *dma = dev->dma;
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;
drm_buf_t **temp_buflist;
count = request->count;
order = DRM(order)(request->size);
size = 1 << order;
alignment = (request->flags & _DRM_PAGE_ALIGN)
? round_page(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 );
entry = &dma->bufs[order];
entry->buflist = DRM(calloc)(1, count * sizeof(*entry->buflist),
DRM_MEM_BUFS);
if (entry->buflist == NULL)
return DRM_ERR(ENOMEM);
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 = (dma->byte_count + offset);
buf->bus_address = agp_offset + offset;
buf->address = (void *)(agp_offset + offset + dev->sg->handle);
buf->next = NULL;
buf->pending = 0;
buf->filp = NULL;
buf->dev_priv_size = sizeof(DRIVER_BUF_PRIV_T);
buf->dev_private = DRM(calloc)(1, buf->dev_priv_size,
DRM_MEM_BUFS);
if (buf->dev_private == NULL) {
/* Set count correctly so we free the proper amount. */
entry->buf_count = count;
DRM(cleanup_buf_error)(dev, entry);
return DRM_ERR(ENOMEM);
}
DRM_DEBUG( "buffer %d @ %p\n",
entry->buf_count, buf->address );
offset += alignment;
entry->buf_count++;
byte_count += PAGE_SIZE << page_order;
}
DRM_DEBUG( "byte_count: %d\n", byte_count );
temp_buflist = DRM(realloc)( dma->buflist,
dma->buf_count * sizeof(*dma->buflist),
(dma->buf_count + entry->buf_count)
* sizeof(*dma->buflist),
DRM_MEM_BUFS );
if (temp_buflist == NULL) {
/* Free the entry because it isn't valid */
DRM(cleanup_buf_error)(dev, entry);
return DRM_ERR(ENOMEM);
}
dma->buflist = temp_buflist;
for ( i = 0 ; i < entry->buf_count ; i++ ) {
dma->buflist[i + dma->buf_count] = &entry->buflist[i];
}
dma->buf_count += entry->buf_count;
dma->byte_count += byte_count;
DRM_DEBUG( "dma->buf_count : %d\n", dma->buf_count );
DRM_DEBUG( "entry->buf_count : %d\n", entry->buf_count );
request->count = entry->buf_count;
request->size = size;
dma->flags = _DRM_DMA_USE_SG;
return 0;
}
#endif /* __REALLY_HAVE_SG */
int DRM(addbufs)( DRM_IOCTL_ARGS )
{
DRM_DEVICE;
drm_buf_desc_t request;
int err;
int order;
DRM_COPY_FROM_USER_IOCTL( request, (drm_buf_desc_t *)data, sizeof(request) );
if (request.count < 0 || request.count > 4096)
return DRM_ERR(EINVAL);
order = DRM(order)(request.size);
if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER)
return DRM_ERR(EINVAL);
DRM_SPINLOCK(&dev->dma_lock);
/* No more allocations after first buffer-using ioctl. */
if (dev->buf_use != 0) {
DRM_SPINUNLOCK(&dev->dma_lock);
return DRM_ERR(EBUSY);
}
/* No more than one allocation per order */
if (dev->dma->bufs[order].buf_count != 0) {
DRM_SPINUNLOCK(&dev->dma_lock);
return DRM_ERR(ENOMEM);
}
#if __REALLY_HAVE_AGP
if ( request.flags & _DRM_AGP_BUFFER )
err = DRM(addbufs_agp)(dev, &request);
else
#endif
#if __REALLY_HAVE_SG
if ( request.flags & _DRM_SG_BUFFER )
err = DRM(addbufs_sg)(dev, &request);
else
#endif
#if __HAVE_PCI_DMA
err = DRM(addbufs_pci)(dev, &request);
#else
err = DRM_ERR(EINVAL);
#endif
DRM_SPINUNLOCK(&dev->dma_lock);
DRM_COPY_TO_USER_IOCTL((drm_buf_desc_t *)data, request, sizeof(request));
return err;
}
int DRM(infobufs)( DRM_IOCTL_ARGS )
{
DRM_DEVICE;
drm_device_dma_t *dma = dev->dma;
drm_buf_info_t request;
int i;
int count;
int retcode = 0;
DRM_COPY_FROM_USER_IOCTL( request, (drm_buf_info_t *)data, sizeof(request) );
DRM_SPINLOCK(&dev->dma_lock);
++dev->buf_use; /* Can't allocate more after this call */
DRM_SPINUNLOCK(&dev->dma_lock);
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 ) {
drm_buf_desc_t from;
from.count = dma->bufs[i].buf_count;
from.size = dma->bufs[i].buf_size;
from.low_mark = dma->bufs[i].freelist.low_mark;
from.high_mark = dma->bufs[i].freelist.high_mark;
if (DRM_COPY_TO_USER(&request.list[count], &from,
sizeof(drm_buf_desc_t)) != 0) {
retcode = DRM_ERR(EFAULT);
break;
}
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;
DRM_COPY_TO_USER_IOCTL( (drm_buf_info_t *)data, request, sizeof(request) );
return retcode;
}
int DRM(markbufs)( DRM_IOCTL_ARGS )
{
DRM_DEVICE;
drm_device_dma_t *dma = dev->dma;
drm_buf_desc_t request;
int order;
DRM_COPY_FROM_USER_IOCTL( request, (drm_buf_desc_t *)data, sizeof(request) );
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 ||
request.low_mark < 0 || request.high_mark < 0) {
return DRM_ERR(EINVAL);
}
DRM_SPINLOCK(&dev->dma_lock);
if (request.low_mark > dma->bufs[order].buf_count ||
request.high_mark > dma->bufs[order].buf_count) {
return DRM_ERR(EINVAL);
}
dma->bufs[order].freelist.low_mark = request.low_mark;
dma->bufs[order].freelist.high_mark = request.high_mark;
DRM_SPINUNLOCK(&dev->dma_lock);
return 0;
}
int DRM(freebufs)( DRM_IOCTL_ARGS )
{
DRM_DEVICE;
drm_device_dma_t *dma = dev->dma;
drm_buf_free_t request;
int i;
int idx;
drm_buf_t *buf;
int retcode = 0;
DRM_COPY_FROM_USER_IOCTL( request, (drm_buf_free_t *)data, sizeof(request) );
DRM_DEBUG( "%d\n", request.count );
DRM_SPINLOCK(&dev->dma_lock);
for ( i = 0 ; i < request.count ; i++ ) {
if (DRM_COPY_FROM_USER(&idx, &request.list[i], sizeof(idx))) {
retcode = DRM_ERR(EFAULT);
break;
}
if ( idx < 0 || idx >= dma->buf_count ) {
DRM_ERROR( "Index %d (of %d max)\n",
idx, dma->buf_count - 1 );
retcode = DRM_ERR(EINVAL);
break;
}
buf = dma->buflist[idx];
if ( buf->filp != filp ) {
DRM_ERROR("Process %d freeing buffer not owned\n",
DRM_CURRENTPID);
retcode = DRM_ERR(EINVAL);
break;
}
DRM(free_buffer)( dev, buf );
}
DRM_SPINUNLOCK(&dev->dma_lock);
return retcode;
}
int DRM(mapbufs)( DRM_IOCTL_ARGS )
{
DRM_DEVICE;
drm_device_dma_t *dma = dev->dma;
int retcode = 0;
const int zero = 0;
vm_offset_t address;
struct vmspace *vms;
#ifdef __FreeBSD__
vm_ooffset_t foff;
vm_size_t size;
vm_offset_t vaddr;
#endif /* __FreeBSD__ */
#ifdef __NetBSD__
struct vnode *vn;
vm_size_t size;
vaddr_t vaddr;
#endif /* __NetBSD__ */
drm_buf_map_t request;
int i;
DRM_COPY_FROM_USER_IOCTL( request, (drm_buf_map_t *)data, sizeof(request) );
#ifdef __NetBSD__
if (!vfinddev(kdev, VCHR, &vn))
return 0; /* FIXME: Shouldn't this be EINVAL or something? */
#endif /* __NetBSD__ */
#if defined(__FreeBSD__) && __FreeBSD_version >= 500000
vms = p->td_proc->p_vmspace;
#else
vms = p->p_vmspace;
#endif
DRM_SPINLOCK(&dev->dma_lock);
dev->buf_use++; /* Can't allocate more after this call */
DRM_SPINUNLOCK(&dev->dma_lock);
if (request.count < dma->buf_count)
goto done;
if ((__HAVE_AGP && (dma->flags & _DRM_DMA_USE_AGP)) ||
(__HAVE_SG && (dma->flags & _DRM_DMA_USE_SG))) {
drm_local_map_t *map = DRIVER_AGP_BUFFERS_MAP(dev);
if (map == NULL) {
retcode = EINVAL;
goto done;
}
size = round_page(map->size);
foff = map->offset;
} else {
size = round_page(dma->byte_count),
foff = 0;
}
#ifdef __FreeBSD__
vaddr = round_page((vm_offset_t)vms->vm_daddr + MAXDSIZ);
#ifdef this_is_just_plain_bogus
retcode = vm_mmap(&vms->vm_map, &vaddr, size, PROT_READ | PROT_WRITE,
VM_PROT_ALL, MAP_SHARED, SLIST_FIRST(&kdev->si_hlist), foff );
#else
retcode = EOPNOTSUPP;
#endif
#elif defined(__NetBSD__)
vaddr = round_page((vaddr_t)vms->vm_daddr + MAXDSIZ);
retcode = uvm_mmap(&vms->vm_map, &vaddr, size,
UVM_PROT_READ | UVM_PROT_WRITE, UVM_PROT_ALL, MAP_SHARED,
&vn->v_uobj, foff, p->p_rlimit[RLIMIT_MEMLOCK].rlim_cur);
#endif /* __NetBSD__ */
if (retcode)
goto done;
request.virtual = (void *)vaddr;
for ( i = 0 ; i < dma->buf_count ; i++ ) {
if (DRM_COPY_TO_USER(&request.list[i].idx,
&dma->buflist[i]->idx, sizeof(request.list[0].idx))) {
retcode = EFAULT;
goto done;
}
if (DRM_COPY_TO_USER(&request.list[i].total,
&dma->buflist[i]->total, sizeof(request.list[0].total))) {
retcode = EFAULT;
goto done;
}
if (DRM_COPY_TO_USER(&request.list[i].used, &zero,
sizeof(zero))) {
retcode = EFAULT;
goto done;
}
address = vaddr + dma->buflist[i]->offset; /* *** */
if (DRM_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 );
DRM_COPY_TO_USER_IOCTL((drm_buf_map_t *)data, request, sizeof(request));
return DRM_ERR(retcode);
}
#endif /* __HAVE_DMA */
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