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freebsd/sys/dev/drm/drm_bufs.c

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/*-
* 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>
*
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/** @file drm_bufs.c
* Implementation of the ioctls for setup of DRM mappings and DMA buffers.
*/
#include "dev/pci/pcireg.h"
#include "dev/drm/drmP.h"
/* Allocation of PCI memory resources (framebuffer, registers, etc.) for
* drm_get_resource_*. Note that they are not RF_ACTIVE, so there's no virtual
* address for accessing them. Cleaned up at unload.
*/
static int drm_alloc_resource(struct drm_device *dev, int resource)
{
struct resource *res;
int rid;
DRM_SPINLOCK_ASSERT(&dev->dev_lock);
if (resource >= DRM_MAX_PCI_RESOURCE) {
DRM_ERROR("Resource %d too large\n", resource);
return 1;
}
if (dev->pcir[resource] != NULL) {
return 0;
}
DRM_UNLOCK();
rid = PCIR_BAR(resource);
res = bus_alloc_resource_any(dev->device, SYS_RES_MEMORY, &rid,
RF_SHAREABLE);
DRM_LOCK();
if (res == NULL) {
DRM_ERROR("Couldn't find resource 0x%x\n", resource);
return 1;
}
if (dev->pcir[resource] == NULL) {
dev->pcirid[resource] = rid;
dev->pcir[resource] = res;
}
return 0;
}
unsigned long drm_get_resource_start(struct drm_device *dev,
unsigned int resource)
{
if (drm_alloc_resource(dev, resource) != 0)
return 0;
return rman_get_start(dev->pcir[resource]);
}
unsigned long drm_get_resource_len(struct drm_device *dev,
unsigned int resource)
{
if (drm_alloc_resource(dev, resource) != 0)
return 0;
return rman_get_size(dev->pcir[resource]);
}
int drm_addmap(struct drm_device * dev, unsigned long offset,
unsigned long size,
enum drm_map_type type, enum drm_map_flags flags, drm_local_map_t **map_ptr)
{
drm_local_map_t *map;
int align;
/*drm_agp_mem_t *entry;
int valid;*/
/* 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 ((flags & _DRM_REMOVABLE) && type != _DRM_SHM) {
DRM_ERROR("Requested removable map for non-DRM_SHM\n");
return EINVAL;
}
if ((offset & PAGE_MASK) || (size & PAGE_MASK)) {
DRM_ERROR("offset/size not page aligned: 0x%lx/0x%lx\n",
offset, size);
return EINVAL;
}
if (offset + size < offset) {
DRM_ERROR("offset and size wrap around: 0x%lx/0x%lx\n",
offset, size);
return EINVAL;
}
DRM_DEBUG("offset = 0x%08lx, size = 0x%08lx, type = %d\n", offset,
size, type);
/* Check if this is just another version of a kernel-allocated map, and
* just hand that back if so.
*/
if (type == _DRM_REGISTERS || type == _DRM_FRAME_BUFFER ||
type == _DRM_SHM) {
TAILQ_FOREACH(map, &dev->maplist, link) {
if (map->type == type && (map->offset == offset ||
(map->type == _DRM_SHM &&
map->flags == _DRM_CONTAINS_LOCK))) {
map->size = size;
DRM_DEBUG("Found kernel map %d\n", type);
goto done;
}
}
}
DRM_UNLOCK();
/* Allocate a new map structure, fill it in, and do any type-specific
* initialization necessary.
*/
map = malloc(sizeof(*map), DRM_MEM_MAPS, M_ZERO | M_NOWAIT);
if (!map) {
DRM_LOCK();
return ENOMEM;
}
map->offset = offset;
map->size = size;
map->type = type;
map->flags = flags;
map->handle = (void *)((unsigned long)alloc_unr(dev->map_unrhdr) <<
DRM_MAP_HANDLE_SHIFT);
switch (map->type) {
case _DRM_REGISTERS:
map->virtual = drm_ioremap(dev, map);
if (!(map->flags & _DRM_WRITE_COMBINING))
break;
/* FALLTHROUGH */
case _DRM_FRAME_BUFFER:
if (drm_mtrr_add(map->offset, map->size, DRM_MTRR_WC) == 0)
map->mtrr = 1;
break;
case _DRM_SHM:
map->virtual = malloc(map->size, DRM_MEM_MAPS, M_NOWAIT);
DRM_DEBUG("%lu %d %p\n",
map->size, drm_order(map->size), map->virtual);
if (!map->virtual) {
free(map, DRM_MEM_MAPS);
DRM_LOCK();
return ENOMEM;
}
map->offset = (unsigned long)map->virtual;
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();
free(map->virtual, DRM_MEM_MAPS);
free(map, DRM_MEM_MAPS);
return EBUSY;
}
dev->lock.hw_lock = map->virtual; /* Pointer to lock */
DRM_UNLOCK();
}
break;
case _DRM_AGP:
/*valid = 0;*/
/* In some cases (i810 driver), user space may have already
* added the AGP base itself, because dev->agp->base previously
* only got set during AGP enable. So, only add the base
* address if the map's offset isn't already within the
* aperture.
*/
if (map->offset < dev->agp->base ||
map->offset > dev->agp->base +
dev->agp->info.ai_aperture_size - 1) {
map->offset += dev->agp->base;
}
map->mtrr = dev->agp->mtrr; /* for getmap */
/*for (entry = dev->agp->memory; entry; entry = entry->next) {
if ((map->offset >= entry->bound) &&
(map->offset + map->size <=
entry->bound + entry->pages * PAGE_SIZE)) {
valid = 1;
break;
}
}
if (!valid) {
free(map, DRM_MEM_MAPS);
DRM_LOCK();
return EACCES;
}*/
break;
case _DRM_SCATTER_GATHER:
if (!dev->sg) {
free(map, DRM_MEM_MAPS);
DRM_LOCK();
return EINVAL;
}
map->virtual = (void *)(dev->sg->vaddr + offset);
map->offset = dev->sg->vaddr + offset;
break;
case _DRM_CONSISTENT:
/* Unfortunately, we don't get any alignment specification from
* the caller, so we have to guess. drm_pci_alloc requires
* a power-of-two alignment, so try to align the bus address of
* the map to it size if possible, otherwise just assume
* PAGE_SIZE alignment.
*/
align = map->size;
if ((align & (align - 1)) != 0)
align = PAGE_SIZE;
map->dmah = drm_pci_alloc(dev, map->size, align, 0xfffffffful);
if (map->dmah == NULL) {
free(map, DRM_MEM_MAPS);
DRM_LOCK();
return ENOMEM;
}
map->virtual = map->dmah->vaddr;
map->offset = map->dmah->busaddr;
break;
default:
DRM_ERROR("Bad map type %d\n", map->type);
free(map, DRM_MEM_MAPS);
DRM_LOCK();
return EINVAL;
}
DRM_LOCK();
TAILQ_INSERT_TAIL(&dev->maplist, map, link);
done:
/* Jumped to, with lock held, when a kernel map is found. */
DRM_DEBUG("Added map %d 0x%lx/0x%lx\n", map->type, map->offset,
map->size);
*map_ptr = map;
return 0;
}
int drm_addmap_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_map *request = data;
drm_local_map_t *map;
int err;
if (!(dev->flags & (FREAD|FWRITE)))
return EACCES; /* Require read/write */
if (!DRM_SUSER(DRM_CURPROC) && request->type != _DRM_AGP)
return EACCES;
DRM_LOCK();
err = drm_addmap(dev, request->offset, request->size, request->type,
request->flags, &map);
DRM_UNLOCK();
if (err != 0)
return err;
request->offset = map->offset;
request->size = map->size;
request->type = map->type;
request->flags = map->flags;
request->mtrr = map->mtrr;
request->handle = (void *)map->handle;
return 0;
}
void drm_rmmap(struct drm_device *dev, drm_local_map_t *map)
{
DRM_SPINLOCK_ASSERT(&dev->dev_lock);
if (map == NULL)
return;
TAILQ_REMOVE(&dev->maplist, map, link);
switch (map->type) {
case _DRM_REGISTERS:
if (map->bsr == NULL)
drm_ioremapfree(map);
/* FALLTHROUGH */
case _DRM_FRAME_BUFFER:
if (map->mtrr) {
int __unused retcode;
retcode = drm_mtrr_del(0, map->offset, map->size,
DRM_MTRR_WC);
DRM_DEBUG("mtrr_del = %d\n", retcode);
}
break;
case _DRM_SHM:
free(map->virtual, DRM_MEM_MAPS);
break;
case _DRM_AGP:
case _DRM_SCATTER_GATHER:
break;
case _DRM_CONSISTENT:
drm_pci_free(dev, map->dmah);
break;
default:
DRM_ERROR("Bad map type %d\n", map->type);
break;
}
if (map->bsr != NULL) {
bus_release_resource(dev->device, SYS_RES_MEMORY, map->rid,
map->bsr);
}
DRM_UNLOCK();
if (map->handle)
free_unr(dev->map_unrhdr, (unsigned long)map->handle >>
DRM_MAP_HANDLE_SHIFT);
DRM_LOCK();
free(map, DRM_MEM_MAPS);
}
/* Remove a map private from list and deallocate resources if the mapping
* isn't in use.
*/
int drm_rmmap_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
drm_local_map_t *map;
struct drm_map *request = data;
DRM_LOCK();
TAILQ_FOREACH(map, &dev->maplist, link) {
if (map->handle == request->handle &&
map->flags & _DRM_REMOVABLE)
break;
}
/* No match found. */
if (map == NULL) {
DRM_UNLOCK();
return EINVAL;
}
drm_rmmap(dev, map);
DRM_UNLOCK();
return 0;
}
static void drm_cleanup_buf_error(struct drm_device *dev,
drm_buf_entry_t *entry)
{
int i;
if (entry->seg_count) {
for (i = 0; i < entry->seg_count; i++) {
drm_pci_free(dev, entry->seglist[i]);
}
free(entry->seglist, DRM_MEM_SEGS);
entry->seg_count = 0;
}
if (entry->buf_count) {
for (i = 0; i < entry->buf_count; i++) {
free(entry->buflist[i].dev_private, DRM_MEM_BUFS);
}
free(entry->buflist, DRM_MEM_BUFS);
entry->buf_count = 0;
}
}
static int drm_do_addbufs_agp(struct drm_device *dev, struct drm_buf_desc *request)
{
drm_device_dma_t *dma = dev->dma;
drm_buf_entry_t *entry;
/*drm_agp_mem_t *agp_entry;
int valid*/
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);
/* Make sure buffers are located in AGP memory that we own */
/* Breaks MGA due to drm_alloc_agp not setting up entries for the
* memory. Safe to ignore for now because these ioctls are still
* root-only.
*/
/*valid = 0;
for (agp_entry = dev->agp->memory; agp_entry;
agp_entry = agp_entry->next) {
if ((agp_offset >= agp_entry->bound) &&
(agp_offset + total * count <=
agp_entry->bound + agp_entry->pages * PAGE_SIZE)) {
valid = 1;
break;
}
}
if (!valid) {
DRM_DEBUG("zone invalid\n");
return EINVAL;
}*/
entry = &dma->bufs[order];
entry->buflist = malloc(count * sizeof(*entry->buflist), DRM_MEM_BUFS,
M_NOWAIT | M_ZERO);
if (!entry->buflist) {
return 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);
buf->next = NULL;
buf->pending = 0;
buf->file_priv = NULL;
buf->dev_priv_size = dev->driver->buf_priv_size;
buf->dev_private = malloc(buf->dev_priv_size, DRM_MEM_BUFS,
M_NOWAIT | M_ZERO);
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 ENOMEM;
}
offset += alignment;
entry->buf_count++;
byte_count += PAGE_SIZE << page_order;
}
DRM_DEBUG("byte_count: %d\n", byte_count);
temp_buflist = realloc(dma->buflist,
(dma->buf_count + entry->buf_count) * sizeof(*dma->buflist),
DRM_MEM_BUFS, M_NOWAIT);
if (temp_buflist == NULL) {
/* Free the entry because it isn't valid */
drm_cleanup_buf_error(dev, entry);
return 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;
}
static int drm_do_addbufs_pci(struct drm_device *dev, struct drm_buf_desc *request)
{
drm_device_dma_t *dma = dev->dma;
int count;
int order;
int size;
int total;
int page_order;
drm_buf_entry_t *entry;
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;
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 = malloc(count * sizeof(*entry->buflist), DRM_MEM_BUFS,
M_NOWAIT | M_ZERO);
entry->seglist = malloc(count * sizeof(*entry->seglist), DRM_MEM_SEGS,
M_NOWAIT | M_ZERO);
/* Keep the original pagelist until we know all the allocations
* have succeeded
*/
temp_pagelist = malloc((dma->page_count + (count << page_order)) *
sizeof(*dma->pagelist), DRM_MEM_PAGES, M_NOWAIT);
if (entry->buflist == NULL || entry->seglist == NULL ||
temp_pagelist == NULL) {
free(temp_pagelist, DRM_MEM_PAGES);
free(entry->seglist, DRM_MEM_SEGS);
free(entry->buflist, DRM_MEM_BUFS);
return ENOMEM;
}
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) {
DRM_SPINUNLOCK(&dev->dma_lock);
drm_dma_handle_t *dmah = drm_pci_alloc(dev, size, alignment,
0xfffffffful);
DRM_SPINLOCK(&dev->dma_lock);
if (dmah == NULL) {
/* Set count correctly so we free the proper amount. */
entry->buf_count = count;
entry->seg_count = count;
drm_cleanup_buf_error(dev, entry);
free(temp_pagelist, DRM_MEM_PAGES);
return ENOMEM;
}
entry->seglist[entry->seg_count++] = dmah;
for (i = 0; i < (1 << page_order); i++) {
DRM_DEBUG("page %d @ %p\n",
dma->page_count + page_count,
(char *)dmah->vaddr + PAGE_SIZE * i);
temp_pagelist[dma->page_count + page_count++] =
(long)dmah->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 = ((char *)dmah->vaddr + offset);
buf->bus_address = dmah->busaddr + offset;
buf->next = NULL;
buf->pending = 0;
buf->file_priv = NULL;
buf->dev_priv_size = dev->driver->buf_priv_size;
buf->dev_private = malloc(buf->dev_priv_size,
DRM_MEM_BUFS, M_NOWAIT | M_ZERO);
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);
free(temp_pagelist, DRM_MEM_PAGES);
return ENOMEM;
}
DRM_DEBUG("buffer %d @ %p\n",
entry->buf_count, buf->address);
}
byte_count += PAGE_SIZE << page_order;
}
temp_buflist = realloc(dma->buflist,
(dma->buf_count + entry->buf_count) * sizeof(*dma->buflist),
DRM_MEM_BUFS, M_NOWAIT);
if (temp_buflist == NULL) {
/* Free the entry because it isn't valid */
drm_cleanup_buf_error(dev, entry);
free(temp_pagelist, DRM_MEM_PAGES);
return 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.
*/
free(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;
}
static int drm_do_addbufs_sg(struct drm_device *dev, struct drm_buf_desc *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 = malloc(count * sizeof(*entry->buflist), DRM_MEM_BUFS,
M_NOWAIT | M_ZERO);
if (entry->buflist == NULL)
return 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->vaddr);
buf->next = NULL;
buf->pending = 0;
buf->file_priv = NULL;
buf->dev_priv_size = dev->driver->buf_priv_size;
buf->dev_private = malloc(buf->dev_priv_size, DRM_MEM_BUFS,
M_NOWAIT | M_ZERO);
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 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 = realloc(dma->buflist,
(dma->buf_count + entry->buf_count) * sizeof(*dma->buflist),
DRM_MEM_BUFS, M_NOWAIT);
if (temp_buflist == NULL) {
/* Free the entry because it isn't valid */
drm_cleanup_buf_error(dev, entry);
return 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;
}
int drm_addbufs_agp(struct drm_device *dev, struct drm_buf_desc *request)
{
int order, ret;
if (request->count < 0 || request->count > 4096)
return EINVAL;
order = drm_order(request->size);
if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER)
return 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 EBUSY;
}
/* No more than one allocation per order */
if (dev->dma->bufs[order].buf_count != 0) {
DRM_SPINUNLOCK(&dev->dma_lock);
return ENOMEM;
}
ret = drm_do_addbufs_agp(dev, request);
DRM_SPINUNLOCK(&dev->dma_lock);
return ret;
}
int drm_addbufs_sg(struct drm_device *dev, struct drm_buf_desc *request)
{
int order, ret;
if (!DRM_SUSER(DRM_CURPROC))
return EACCES;
if (request->count < 0 || request->count > 4096)
return EINVAL;
order = drm_order(request->size);
if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER)
return 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 EBUSY;
}
/* No more than one allocation per order */
if (dev->dma->bufs[order].buf_count != 0) {
DRM_SPINUNLOCK(&dev->dma_lock);
return ENOMEM;
}
ret = drm_do_addbufs_sg(dev, request);
DRM_SPINUNLOCK(&dev->dma_lock);
return ret;
}
int drm_addbufs_pci(struct drm_device *dev, struct drm_buf_desc *request)
{
int order, ret;
if (!DRM_SUSER(DRM_CURPROC))
return EACCES;
if (request->count < 0 || request->count > 4096)
return EINVAL;
order = drm_order(request->size);
if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER)
return 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 EBUSY;
}
/* No more than one allocation per order */
if (dev->dma->bufs[order].buf_count != 0) {
DRM_SPINUNLOCK(&dev->dma_lock);
return ENOMEM;
}
ret = drm_do_addbufs_pci(dev, request);
DRM_SPINUNLOCK(&dev->dma_lock);
return ret;
}
int drm_addbufs(struct drm_device *dev, void *data, struct drm_file *file_priv)
{
struct drm_buf_desc *request = data;
int err;
if (request->flags & _DRM_AGP_BUFFER)
err = drm_addbufs_agp(dev, request);
else if (request->flags & _DRM_SG_BUFFER)
err = drm_addbufs_sg(dev, request);
else
err = drm_addbufs_pci(dev, request);
return err;
}
int drm_infobufs(struct drm_device *dev, void *data, struct drm_file *file_priv)
{
drm_device_dma_t *dma = dev->dma;
struct drm_buf_info *request = data;
int i;
int count;
int retcode = 0;
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) {
struct drm_buf_desc 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(struct drm_buf_desc)) != 0) {
retcode = 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;
return retcode;
}
int drm_markbufs(struct drm_device *dev, void *data, struct drm_file *file_priv)
{
drm_device_dma_t *dma = dev->dma;
struct drm_buf_desc *request = data;
int order;
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 EINVAL;
}
DRM_SPINLOCK(&dev->dma_lock);
if (request->low_mark > dma->bufs[order].buf_count ||
request->high_mark > dma->bufs[order].buf_count) {
DRM_SPINUNLOCK(&dev->dma_lock);
return 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(struct drm_device *dev, void *data, struct drm_file *file_priv)
{
drm_device_dma_t *dma = dev->dma;
struct drm_buf_free *request = data;
int i;
int idx;
drm_buf_t *buf;
int retcode = 0;
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 = EFAULT;
break;
}
if (idx < 0 || idx >= dma->buf_count) {
DRM_ERROR("Index %d (of %d max)\n",
idx, dma->buf_count - 1);
retcode = EINVAL;
break;
}
buf = dma->buflist[idx];
if (buf->file_priv != file_priv) {
DRM_ERROR("Process %d freeing buffer not owned\n",
DRM_CURRENTPID);
retcode = EINVAL;
break;
}
drm_free_buffer(dev, buf);
}
DRM_SPINUNLOCK(&dev->dma_lock);
return retcode;
}
int drm_mapbufs(struct drm_device *dev, void *data, struct drm_file *file_priv)
{
drm_device_dma_t *dma = dev->dma;
int retcode = 0;
const int zero = 0;
vm_offset_t address;
struct vmspace *vms;
vm_ooffset_t foff;
vm_size_t size;
vm_offset_t vaddr;
struct drm_buf_map *request = data;
int i;
vms = DRM_CURPROC->td_proc->p_vmspace;
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 ((drm_core_has_AGP(dev) && (dma->flags & _DRM_DMA_USE_AGP)) ||
(drm_core_check_feature(dev, DRIVER_SG) &&
(dma->flags & _DRM_DMA_USE_SG))) {
drm_local_map_t *map = dev->agp_buffer_map;
if (map == NULL) {
retcode = EINVAL;
goto done;
}
size = round_page(map->size);
foff = (unsigned long)map->handle;
} else {
size = round_page(dma->byte_count),
foff = 0;
}
vaddr = round_page((vm_offset_t)vms->vm_daddr + MAXDSIZ);
retcode = vm_mmap(&vms->vm_map, &vaddr, size, VM_PROT_READ |
VM_PROT_WRITE, VM_PROT_ALL, MAP_SHARED | MAP_NOSYNC, OBJT_DEVICE,
dev->devnode, foff);
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);
return retcode;
}
/*
* Compute order. Can be made faster.
*/
int drm_order(unsigned long size)
{
int order;
if (size == 0)
return 0;
order = flsl(size) - 1;
if (size & ~(1ul << order))
++order;
return order;
}
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