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Diffstat (limited to 'drivers/char/drm/drm_bufs.c')
-rw-r--r--drivers/char/drm/drm_bufs.c1601
1 files changed, 0 insertions, 1601 deletions
diff --git a/drivers/char/drm/drm_bufs.c b/drivers/char/drm/drm_bufs.c
deleted file mode 100644
index bde64b84166..00000000000
--- a/drivers/char/drm/drm_bufs.c
+++ /dev/null
@@ -1,1601 +0,0 @@
-/**
- * \file drm_bufs.c
- * Generic buffer template
- *
- * \author Rickard E. (Rik) Faith <faith@valinux.com>
- * \author Gareth Hughes <gareth@valinux.com>
- */
-
-/*
- * 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.
- */
-
-#include <linux/vmalloc.h>
-#include "drmP.h"
-
-unsigned long drm_get_resource_start(struct drm_device *dev, unsigned int resource)
-{
- return pci_resource_start(dev->pdev, resource);
-}
-EXPORT_SYMBOL(drm_get_resource_start);
-
-unsigned long drm_get_resource_len(struct drm_device *dev, unsigned int resource)
-{
- return pci_resource_len(dev->pdev, resource);
-}
-
-EXPORT_SYMBOL(drm_get_resource_len);
-
-static struct drm_map_list *drm_find_matching_map(struct drm_device *dev,
- drm_local_map_t *map)
-{
- struct drm_map_list *entry;
- list_for_each_entry(entry, &dev->maplist, head) {
- if (entry->map && map->type == entry->map->type &&
- ((entry->map->offset == map->offset) ||
- (map->type == _DRM_SHM && map->flags==_DRM_CONTAINS_LOCK))) {
- return entry;
- }
- }
-
- return NULL;
-}
-
-static int drm_map_handle(struct drm_device *dev, struct drm_hash_item *hash,
- unsigned long user_token, int hashed_handle)
-{
- int use_hashed_handle;
-#if (BITS_PER_LONG == 64)
- use_hashed_handle = ((user_token & 0xFFFFFFFF00000000UL) || hashed_handle);
-#elif (BITS_PER_LONG == 32)
- use_hashed_handle = hashed_handle;
-#else
-#error Unsupported long size. Neither 64 nor 32 bits.
-#endif
-
- if (!use_hashed_handle) {
- int ret;
- hash->key = user_token >> PAGE_SHIFT;
- ret = drm_ht_insert_item(&dev->map_hash, hash);
- if (ret != -EINVAL)
- return ret;
- }
- return drm_ht_just_insert_please(&dev->map_hash, hash,
- user_token, 32 - PAGE_SHIFT - 3,
- 0, DRM_MAP_HASH_OFFSET >> PAGE_SHIFT);
-}
-
-/**
- * Ioctl to specify a range of memory that is available for mapping by a non-root process.
- *
- * \param inode device inode.
- * \param file_priv DRM file private.
- * \param cmd command.
- * \param arg pointer to a drm_map structure.
- * \return zero on success or a negative value on error.
- *
- * Adjusts the memory offset to its absolute value according to the mapping
- * type. Adds the map to the map list drm_device::maplist. Adds MTRR's where
- * applicable and if supported by the kernel.
- */
-static int drm_addmap_core(struct drm_device * dev, unsigned int offset,
- unsigned int size, enum drm_map_type type,
- enum drm_map_flags flags,
- struct drm_map_list ** maplist)
-{
- struct drm_map *map;
- struct drm_map_list *list;
- drm_dma_handle_t *dmah;
- unsigned long user_token;
- int ret;
-
- map = drm_alloc(sizeof(*map), DRM_MEM_MAPS);
- if (!map)
- return -ENOMEM;
-
- map->offset = offset;
- map->size = size;
- map->flags = flags;
- map->type = type;
-
- /* 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 -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 -EINVAL;
- }
- map->mtrr = -1;
- map->handle = NULL;
-
- switch (map->type) {
- case _DRM_REGISTERS:
- case _DRM_FRAME_BUFFER:
-#if !defined(__sparc__) && !defined(__alpha__) && !defined(__ia64__) && !defined(__powerpc64__) && !defined(__x86_64__)
- if (map->offset + (map->size-1) < map->offset ||
- map->offset < virt_to_phys(high_memory)) {
- drm_free(map, sizeof(*map), DRM_MEM_MAPS);
- return -EINVAL;
- }
-#endif
-#ifdef __alpha__
- map->offset += dev->hose->mem_space->start;
-#endif
- /* Some drivers preinitialize some maps, without the X Server
- * needing to be aware of it. Therefore, we just return success
- * when the server tries to create a duplicate map.
- */
- list = drm_find_matching_map(dev, map);
- if (list != NULL) {
- if (list->map->size != map->size) {
- DRM_DEBUG("Matching maps of type %d with "
- "mismatched sizes, (%ld vs %ld)\n",
- map->type, map->size,
- list->map->size);
- list->map->size = map->size;
- }
-
- drm_free(map, sizeof(*map), DRM_MEM_MAPS);
- *maplist = list;
- return 0;
- }
-
- if (drm_core_has_MTRR(dev)) {
- if (map->type == _DRM_FRAME_BUFFER ||
- (map->flags & _DRM_WRITE_COMBINING)) {
- map->mtrr = mtrr_add(map->offset, map->size,
- MTRR_TYPE_WRCOMB, 1);
- }
- }
- if (map->type == _DRM_REGISTERS) {
- map->handle = ioremap(map->offset, map->size);
- if (!map->handle) {
- drm_free(map, sizeof(*map), DRM_MEM_MAPS);
- return -ENOMEM;
- }
- }
-
- break;
- case _DRM_SHM:
- list = drm_find_matching_map(dev, map);
- if (list != NULL) {
- if(list->map->size != map->size) {
- DRM_DEBUG("Matching maps of type %d with "
- "mismatched sizes, (%ld vs %ld)\n",
- map->type, map->size, list->map->size);
- list->map->size = map->size;
- }
-
- drm_free(map, sizeof(*map), DRM_MEM_MAPS);
- *maplist = list;
- return 0;
- }
- map->handle = vmalloc_user(map->size);
- 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 -ENOMEM;
- }
- map->offset = (unsigned long)map->handle;
- if (map->flags & _DRM_CONTAINS_LOCK) {
- /* Prevent a 2nd X Server from creating a 2nd lock */
- if (dev->lock.hw_lock != NULL) {
- vfree(map->handle);
- drm_free(map, sizeof(*map), DRM_MEM_MAPS);
- return -EBUSY;
- }
- dev->sigdata.lock = dev->lock.hw_lock = map->handle; /* Pointer to lock */
- }
- break;
- case _DRM_AGP: {
- struct drm_agp_mem *entry;
- int valid = 0;
-
- if (!drm_core_has_AGP(dev)) {
- drm_free(map, sizeof(*map), DRM_MEM_MAPS);
- return -EINVAL;
- }
-#ifdef __alpha__
- map->offset += dev->hose->mem_space->start;
-#endif
- /* 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->agp_info.aper_size * 1024 * 1024 - 1) {
- map->offset += dev->agp->base;
- }
- map->mtrr = dev->agp->agp_mtrr; /* for getmap */
-
- /* This assumes the DRM is in total control of AGP space.
- * It's not always the case as AGP can be in the control
- * of user space (i.e. i810 driver). So this loop will get
- * skipped and we double check that dev->agp->memory is
- * actually set as well as being invalid before EPERM'ing
- */
- list_for_each_entry(entry, &dev->agp->memory, head) {
- if ((map->offset >= entry->bound) &&
- (map->offset + map->size <= entry->bound + entry->pages * PAGE_SIZE)) {
- valid = 1;
- break;
- }
- }
- if (!list_empty(&dev->agp->memory) && !valid) {
- drm_free(map, sizeof(*map), DRM_MEM_MAPS);
- return -EPERM;
- }
- DRM_DEBUG("AGP offset = 0x%08lx, size = 0x%08lx\n", map->offset, map->size);
-
- break;
- }
- case _DRM_SCATTER_GATHER:
- if (!dev->sg) {
- drm_free(map, sizeof(*map), DRM_MEM_MAPS);
- return -EINVAL;
- }
- map->offset += (unsigned long)dev->sg->virtual;
- break;
- case _DRM_CONSISTENT:
- /* dma_addr_t is 64bit on i386 with CONFIG_HIGHMEM64G,
- * As we're limiting the address to 2^32-1 (or less),
- * casting it down to 32 bits is no problem, but we
- * need to point to a 64bit variable first. */
- dmah = drm_pci_alloc(dev, map->size, map->size, 0xffffffffUL);
- if (!dmah) {
- drm_free(map, sizeof(*map), DRM_MEM_MAPS);
- return -ENOMEM;
- }
- map->handle = dmah->vaddr;
- map->offset = (unsigned long)dmah->busaddr;
- kfree(dmah);
- break;
- default:
- drm_free(map, sizeof(*map), DRM_MEM_MAPS);
- return -EINVAL;
- }
-
- list = drm_alloc(sizeof(*list), DRM_MEM_MAPS);
- if (!list) {
- if (map->type == _DRM_REGISTERS)
- iounmap(map->handle);
- drm_free(map, sizeof(*map), DRM_MEM_MAPS);
- return -EINVAL;
- }
- memset(list, 0, sizeof(*list));
- list->map = map;
-
- mutex_lock(&dev->struct_mutex);
- list_add(&list->head, &dev->maplist);
-
- /* Assign a 32-bit handle */
- /* We do it here so that dev->struct_mutex protects the increment */
- user_token = (map->type == _DRM_SHM) ? (unsigned long)map->handle :
- map->offset;
- ret = drm_map_handle(dev, &list->hash, user_token, 0);
- if (ret) {
- if (map->type == _DRM_REGISTERS)
- iounmap(map->handle);
- drm_free(map, sizeof(*map), DRM_MEM_MAPS);
- drm_free(list, sizeof(*list), DRM_MEM_MAPS);
- mutex_unlock(&dev->struct_mutex);
- return ret;
- }
-
- list->user_token = list->hash.key << PAGE_SHIFT;
- mutex_unlock(&dev->struct_mutex);
-
- *maplist = list;
- return 0;
- }
-
-int drm_addmap(struct drm_device * dev, unsigned int offset,
- unsigned int size, enum drm_map_type type,
- enum drm_map_flags flags, drm_local_map_t ** map_ptr)
-{
- struct drm_map_list *list;
- int rc;
-
- rc = drm_addmap_core(dev, offset, size, type, flags, &list);
- if (!rc)
- *map_ptr = list->map;
- return rc;
-}
-
-EXPORT_SYMBOL(drm_addmap);
-
-int drm_addmap_ioctl(struct drm_device *dev, void *data,
- struct drm_file *file_priv)
-{
- struct drm_map *map = data;
- struct drm_map_list *maplist;
- int err;
-
- if (!(capable(CAP_SYS_ADMIN) || map->type == _DRM_AGP))
- return -EPERM;
-
- err = drm_addmap_core(dev, map->offset, map->size, map->type,
- map->flags, &maplist);
-
- if (err)
- return err;
-
- /* avoid a warning on 64-bit, this casting isn't very nice, but the API is set so too late */
- map->handle = (void *)(unsigned long)maplist->user_token;
- return 0;
-}
-
-/**
- * Remove a map private from list and deallocate resources if the mapping
- * isn't in use.
- *
- * \param inode device inode.
- * \param file_priv DRM file private.
- * \param cmd command.
- * \param arg pointer to a struct drm_map structure.
- * \return zero on success or a negative value on error.
- *
- * Searches the map on drm_device::maplist, removes it from the list, see if
- * its being used, and free any associate resource (such as MTRR's) if it's not
- * being on use.
- *
- * \sa drm_addmap
- */
-int drm_rmmap_locked(struct drm_device *dev, drm_local_map_t *map)
-{
- struct drm_map_list *r_list = NULL, *list_t;
- drm_dma_handle_t dmah;
- int found = 0;
-
- /* Find the list entry for the map and remove it */
- list_for_each_entry_safe(r_list, list_t, &dev->maplist, head) {
- if (r_list->map == map) {
- list_del(&r_list->head);
- drm_ht_remove_key(&dev->map_hash,
- r_list->user_token >> PAGE_SHIFT);
- drm_free(r_list, sizeof(*r_list), DRM_MEM_MAPS);
- found = 1;
- break;
- }
- }
-
- if (!found)
- return -EINVAL;
-
- switch (map->type) {
- case _DRM_REGISTERS:
- iounmap(map->handle);
- /* FALLTHROUGH */
- case _DRM_FRAME_BUFFER:
- if (drm_core_has_MTRR(dev) && map->mtrr >= 0) {
- int retcode;
- retcode = mtrr_del(map->mtrr, map->offset, map->size);
- DRM_DEBUG("mtrr_del=%d\n", retcode);
- }
- break;
- case _DRM_SHM:
- vfree(map->handle);
- break;
- case _DRM_AGP:
- case _DRM_SCATTER_GATHER:
- break;
- case _DRM_CONSISTENT:
- dmah.vaddr = map->handle;
- dmah.busaddr = map->offset;
- dmah.size = map->size;
- __drm_pci_free(dev, &dmah);
- break;
- }
- drm_free(map, sizeof(*map), DRM_MEM_MAPS);
-
- return 0;
-}
-
-int drm_rmmap(struct drm_device *dev, drm_local_map_t *map)
-{
- int ret;
-
- mutex_lock(&dev->struct_mutex);
- ret = drm_rmmap_locked(dev, map);
- mutex_unlock(&dev->struct_mutex);
-
- return ret;
-}
-EXPORT_SYMBOL(drm_rmmap);
-
-/* The rmmap ioctl appears to be unnecessary. All mappings are torn down on
- * the last close of the device, and this is necessary for cleanup when things
- * exit uncleanly. Therefore, having userland manually remove mappings seems
- * like a pointless exercise since they're going away anyway.
- *
- * One use case might be after addmap is allowed for normal users for SHM and
- * gets used by drivers that the server doesn't need to care about. This seems
- * unlikely.
- */
-int drm_rmmap_ioctl(struct drm_device *dev, void *data,
- struct drm_file *file_priv)
-{
- struct drm_map *request = data;
- drm_local_map_t *map = NULL;
- struct drm_map_list *r_list;
- int ret;
-
- mutex_lock(&dev->struct_mutex);
- list_for_each_entry(r_list, &dev->maplist, head) {
- if (r_list->map &&
- r_list->user_token == (unsigned long)request->handle &&
- r_list->map->flags & _DRM_REMOVABLE) {
- map = r_list->map;
- break;
- }
- }
-
- /* List has wrapped around to the head pointer, or its empty we didn't
- * find anything.
- */
- if (list_empty(&dev->maplist) || !map) {
- mutex_unlock(&dev->struct_mutex);
- return -EINVAL;
- }
-
- /* Register and framebuffer maps are permanent */
- if ((map->type == _DRM_REGISTERS) || (map->type == _DRM_FRAME_BUFFER)) {
- mutex_unlock(&dev->struct_mutex);
- return 0;
- }
-
- ret = drm_rmmap_locked(dev, map);
-
- mutex_unlock(&dev->struct_mutex);
-
- return ret;
-}
-
-/**
- * Cleanup after an error on one of the addbufs() functions.
- *
- * \param dev DRM device.
- * \param entry buffer entry where the error occurred.
- *
- * Frees any pages and buffers associated with the given entry.
- */
-static void drm_cleanup_buf_error(struct drm_device * dev,
- struct drm_buf_entry * entry)
-{
- int i;
-
- if (entry->seg_count) {
- for (i = 0; i < entry->seg_count; i++) {
- if (entry->seglist[i]) {
- drm_pci_free(dev, entry->seglist[i]);
- }
- }
- drm_free(entry->seglist,
- entry->seg_count *
- sizeof(*entry->seglist), DRM_MEM_SEGS);
-
- entry->seg_count = 0;
- }
-
- if (entry->buf_count) {
- for (i = 0; i < entry->buf_count; i++) {
- if (entry->buflist[i].dev_private) {
- 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 __OS_HAS_AGP
-/**
- * Add AGP buffers for DMA transfers.
- *
- * \param dev struct drm_device to which the buffers are to be added.
- * \param request pointer to a struct drm_buf_desc describing the request.
- * \return zero on success or a negative number on failure.
- *
- * After some sanity checks creates a drm_buf structure for each buffer and
- * reallocates the buffer list of the same size order to accommodate the new
- * buffers.
- */
-int drm_addbufs_agp(struct drm_device * dev, struct drm_buf_desc * request)
-{
- struct drm_device_dma *dma = dev->dma;
- struct drm_buf_entry *entry;
- struct drm_agp_mem *agp_entry;
- struct drm_buf *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, valid;
- struct drm_buf **temp_buflist;
-
- if (!dma)
- return -EINVAL;
-
- 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 = 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: %lx\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 */
-
- /* Make sure buffers are located in AGP memory that we own */
- valid = 0;
- list_for_each_entry(agp_entry, &dev->agp->memory, head) {
- if ((agp_offset >= agp_entry->bound) &&
- (agp_offset + total * count <= agp_entry->bound + agp_entry->pages * PAGE_SIZE)) {
- valid = 1;
- break;
- }
- }
- if (!list_empty(&dev->agp->memory) && !valid) {
- DRM_DEBUG("zone invalid\n");
- return -EINVAL;
- }
- 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);
-
- mutex_lock(&dev->struct_mutex);
- entry = &dma->bufs[order];
- if (entry->buf_count) {
- mutex_unlock(&dev->struct_mutex);
- atomic_dec(&dev->buf_alloc);
- return -ENOMEM; /* May only call once for each order */
- }
-
- if (count < 0 || count > 4096) {
- mutex_unlock(&dev->struct_mutex);
- atomic_dec(&dev->buf_alloc);
- return -EINVAL;
- }
-
- entry->buflist = drm_alloc(count * sizeof(*entry->buflist),
- DRM_MEM_BUFS);
- if (!entry->buflist) {
- mutex_unlock(&dev->struct_mutex);
- 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 = (dma->byte_count + offset);
- buf->bus_address = agp_offset + offset;
- buf->address = (void *)(agp_offset + offset);
- buf->next = NULL;
- buf->waiting = 0;
- buf->pending = 0;
- init_waitqueue_head(&buf->dma_wait);
- buf->file_priv = NULL;
-
- buf->dev_priv_size = dev->driver->dev_priv_size;
- buf->dev_private = drm_alloc(buf->dev_priv_size, DRM_MEM_BUFS);
- if (!buf->dev_private) {
- /* Set count correctly so we free the proper amount. */
- entry->buf_count = count;
- drm_cleanup_buf_error(dev, entry);
- mutex_unlock(&dev->struct_mutex);
- atomic_dec(&dev->buf_alloc);
- return -ENOMEM;
- }
- memset(buf->dev_private, 0, buf->dev_priv_size);
-
- 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) {
- /* Free the entry because it isn't valid */
- drm_cleanup_buf_error(dev, entry);
- mutex_unlock(&dev->struct_mutex);
- atomic_dec(&dev->buf_alloc);
- 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->seg_count += entry->seg_count;
- dma->page_count += byte_count >> PAGE_SHIFT;
- 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);
-
- mutex_unlock(&dev->struct_mutex);
-
- request->count = entry->buf_count;
- request->size = size;
-
- dma->flags = _DRM_DMA_USE_AGP;
-
- atomic_dec(&dev->buf_alloc);
- return 0;
-}
-EXPORT_SYMBOL(drm_addbufs_agp);
-#endif /* __OS_HAS_AGP */
-
-int drm_addbufs_pci(struct drm_device * dev, struct drm_buf_desc * request)
-{
- struct drm_device_dma *dma = dev->dma;
- int count;
- int order;
- int size;
- int total;
- int page_order;
- struct drm_buf_entry *entry;
- drm_dma_handle_t *dmah;
- struct drm_buf *buf;
- int alignment;
- unsigned long offset;
- int i;
- int byte_count;
- int page_count;
- unsigned long *temp_pagelist;
- struct drm_buf **temp_buflist;
-
- if (!drm_core_check_feature(dev, DRIVER_PCI_DMA))
- return -EINVAL;
-
- if (!dma)
- return -EINVAL;
-
- if (!capable(CAP_SYS_ADMIN))
- return -EPERM;
-
- count = request->count;
- order = drm_order(request->size);
- size = 1 << order;
-
- DRM_DEBUG("count=%d, size=%d (%d), order=%d, queue_count=%d\n",
- request->count, request->size, size, order, dev->queue_count);
-
- if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER)
- return -EINVAL;
- if (dev->queue_count)
- return -EBUSY; /* Not while in use */
-
- 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;
-
- 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);
-
- mutex_lock(&dev->struct_mutex);
- entry = &dma->bufs[order];
- if (entry->buf_count) {
- mutex_unlock(&dev->struct_mutex);
- atomic_dec(&dev->buf_alloc);
- return -ENOMEM; /* May only call once for each order */
- }
-
- if (count < 0 || count > 4096) {
- mutex_unlock(&dev->struct_mutex);
- atomic_dec(&dev->buf_alloc);
- return -EINVAL;
- }
-
- entry->buflist = drm_alloc(count * sizeof(*entry->buflist),
- DRM_MEM_BUFS);
- if (!entry->buflist) {
- mutex_unlock(&dev->struct_mutex);
- atomic_dec(&dev->buf_alloc);
- return -ENOMEM;
- }
- memset(entry->buflist, 0, count * sizeof(*entry->buflist));
-
- entry->seglist = drm_alloc(count * sizeof(*entry->seglist),
- DRM_MEM_SEGS);
- if (!entry->seglist) {
- drm_free(entry->buflist,
- count * sizeof(*entry->buflist), DRM_MEM_BUFS);
- mutex_unlock(&dev->struct_mutex);
- atomic_dec(&dev->buf_alloc);
- return -ENOMEM;
- }
- memset(entry->seglist, 0, count * sizeof(*entry->seglist));
-
- /* 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 (!temp_pagelist) {
- drm_free(entry->buflist,
- count * sizeof(*entry->buflist), DRM_MEM_BUFS);
- drm_free(entry->seglist,
- count * sizeof(*entry->seglist), DRM_MEM_SEGS);
- mutex_unlock(&dev->struct_mutex);
- atomic_dec(&dev->buf_alloc);
- 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) {
-
- dmah = drm_pci_alloc(dev, PAGE_SIZE << page_order, 0x1000, 0xfffffffful);
-
- if (!dmah) {
- /* 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);
- mutex_unlock(&dev->struct_mutex);
- atomic_dec(&dev->buf_alloc);
- return -ENOMEM;
- }
- entry->seglist[entry->seg_count++] = dmah;
- for (i = 0; i < (1 << page_order); i++) {
- DRM_DEBUG("page %d @ 0x%08lx\n",
- dma->page_count + page_count,
- (unsigned long)dmah->vaddr + PAGE_SIZE * i);
- temp_pagelist[dma->page_count + page_count++]
- = (unsigned 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 = (void *)(dmah->vaddr + offset);
- buf->bus_address = dmah->busaddr + offset;
- buf->next = NULL;
- buf->waiting = 0;
- buf->pending = 0;
- init_waitqueue_head(&buf->dma_wait);
- buf->file_priv = NULL;
-
- buf->dev_priv_size = dev->driver->dev_priv_size;
- buf->dev_private = drm_alloc(buf->dev_priv_size,
- DRM_MEM_BUFS);
- if (!buf->dev_private) {
- /* 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);
- mutex_unlock(&dev->struct_mutex);
- atomic_dec(&dev->buf_alloc);
- return -ENOMEM;
- }
- memset(buf->dev_private, 0, 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) {
- /* 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);
- mutex_unlock(&dev->struct_mutex);
- atomic_dec(&dev->buf_alloc);
- 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.
- */
- if (dma->page_count) {
- 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);
-
- mutex_unlock(&dev->struct_mutex);
-
- request->count = entry->buf_count;
- request->size = size;
-
- if (request->flags & _DRM_PCI_BUFFER_RO)
- dma->flags = _DRM_DMA_USE_PCI_RO;
-
- atomic_dec(&dev->buf_alloc);
- return 0;
-
-}
-EXPORT_SYMBOL(drm_addbufs_pci);
-
-static int drm_addbufs_sg(struct drm_device * dev, struct drm_buf_desc * request)
-{
- struct drm_device_dma *dma = dev->dma;
- struct drm_buf_entry *entry;
- struct drm_buf *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;
- struct drm_buf **temp_buflist;
-
- if (!drm_core_check_feature(dev, DRIVER_SG))
- return -EINVAL;
-
- if (!dma)
- return -EINVAL;
-
- if (!capable(CAP_SYS_ADMIN))
- return -EPERM;
-
- 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: %lu\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);
-
- mutex_lock(&dev->struct_mutex);
- entry = &dma->bufs[order];
- if (entry->buf_count) {
- mutex_unlock(&dev->struct_mutex);
- atomic_dec(&dev->buf_alloc);
- return -ENOMEM; /* May only call once for each order */
- }
-
- if (count < 0 || count > 4096) {
- mutex_unlock(&dev->struct_mutex);
- atomic_dec(&dev->buf_alloc);
- return -EINVAL;
- }
-
- entry->buflist = drm_alloc(count * sizeof(*entry->buflist),
- DRM_MEM_BUFS);
- if (!entry->buflist) {
- mutex_unlock(&dev->struct_mutex);
- 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 = (dma->byte_count + offset);
- buf->bus_address = agp_offset + offset;
- buf->address = (void *)(agp_offset + offset
- + (unsigned long)dev->sg->virtual);
- buf->next = NULL;
- buf->waiting = 0;
- buf->pending = 0;
- init_waitqueue_head(&buf->dma_wait);
- buf->file_priv = NULL;
-
- buf->dev_priv_size = dev->driver->dev_priv_size;
- buf->dev_private = drm_alloc(buf->dev_priv_size, DRM_MEM_BUFS);
- if (!buf->dev_private) {
- /* Set count correctly so we free the proper amount. */
- entry->buf_count = count;
- drm_cleanup_buf_error(dev, entry);
- mutex_unlock(&dev->struct_mutex);
- atomic_dec(&dev->buf_alloc);
- return -ENOMEM;
- }
-
- memset(buf->dev_private, 0, buf->dev_priv_size);
-
- 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) {
- /* Free the entry because it isn't valid */
- drm_cleanup_buf_error(dev, entry);
- mutex_unlock(&dev->struct_mutex);
- atomic_dec(&dev->buf_alloc);
- 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->seg_count += entry->seg_count;
- dma->page_count += byte_count >> PAGE_SHIFT;
- 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);
-
- mutex_unlock(&dev->struct_mutex);
-
- request->count = entry->buf_count;
- request->size = size;
-
- dma->flags = _DRM_DMA_USE_SG;
-
- atomic_dec(&dev->buf_alloc);
- return 0;
-}
-
-static int drm_addbufs_fb(struct drm_device * dev, struct drm_buf_desc * request)
-{
- struct drm_device_dma *dma = dev->dma;
- struct drm_buf_entry *entry;
- struct drm_buf *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;
- struct drm_buf **temp_buflist;
-
- if (!drm_core_check_feature(dev, DRIVER_FB_DMA))
- return -EINVAL;
-
- if (!dma)
- return -EINVAL;
-
- if (!capable(CAP_SYS_ADMIN))
- return -EPERM;
-
- 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: %lu\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);
-
- mutex_lock(&dev->struct_mutex);
- entry = &dma->bufs[order];
- if (entry->buf_count) {
- mutex_unlock(&dev->struct_mutex);
- atomic_dec(&dev->buf_alloc);
- return -ENOMEM; /* May only call once for each order */
- }
-
- if (count < 0 || count > 4096) {
- mutex_unlock(&dev->struct_mutex);
- atomic_dec(&dev->buf_alloc);
- return -EINVAL;
- }
-
- entry->buflist = drm_alloc(count * sizeof(*entry->buflist),
- DRM_MEM_BUFS);
- if (!entry->buflist) {
- mutex_unlock(&dev->struct_mutex);
- 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 = (dma->byte_count + offset);
- buf->bus_address = agp_offset + offset;
- buf->address = (void *)(agp_offset + offset);
- buf->next = NULL;
- buf->waiting = 0;
- buf->pending = 0;
- init_waitqueue_head(&buf->dma_wait);
- buf->file_priv = NULL;
-
- buf->dev_priv_size = dev->driver->dev_priv_size;
- buf->dev_private = drm_alloc(buf->dev_priv_size, DRM_MEM_BUFS);
- if (!buf->dev_private) {
- /* Set count correctly so we free the proper amount. */
- entry->buf_count = count;
- drm_cleanup_buf_error(dev, entry);
- mutex_unlock(&dev->struct_mutex);
- atomic_dec(&dev->buf_alloc);
- return -ENOMEM;
- }
- memset(buf->dev_private, 0, buf->dev_priv_size);
-
- 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) {
- /* Free the entry because it isn't valid */
- drm_cleanup_buf_error(dev, entry);
- mutex_unlock(&dev->struct_mutex);
- atomic_dec(&dev->buf_alloc);
- 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->seg_count += entry->seg_count;
- dma->page_count += byte_count >> PAGE_SHIFT;
- 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);
-
- mutex_unlock(&dev->struct_mutex);
-
- request->count = entry->buf_count;
- request->size = size;
-
- dma->flags = _DRM_DMA_USE_FB;
-
- atomic_dec(&dev->buf_alloc);
- return 0;
-}
-
-
-/**
- * Add buffers for DMA transfers (ioctl).
- *
- * \param inode device inode.
- * \param file_priv DRM file private.
- * \param cmd command.
- * \param arg pointer to a struct drm_buf_desc request.
- * \return zero on success or a negative number on failure.
- *
- * According with the memory type specified in drm_buf_desc::flags and the
- * build options, it dispatches the call either to addbufs_agp(),
- * addbufs_sg() or addbufs_pci() for AGP, scatter-gather or consistent
- * PCI memory respectively.
- */
-int drm_addbufs(struct drm_device *dev, void *data,
- struct drm_file *file_priv)
-{
- struct drm_buf_desc *request = data;
- int ret;
-
- if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA))
- return -EINVAL;
-
-#if __OS_HAS_AGP
- if (request->flags & _DRM_AGP_BUFFER)
- ret = drm_addbufs_agp(dev, request);
- else
-#endif
- if (request->flags & _DRM_SG_BUFFER)
- ret = drm_addbufs_sg(dev, request);
- else if (request->flags & _DRM_FB_BUFFER)
- ret = drm_addbufs_fb(dev, request);
- else
- ret = drm_addbufs_pci(dev, request);
-
- return ret;
-}
-
-/**
- * Get information about the buffer mappings.
- *
- * This was originally mean for debugging purposes, or by a sophisticated
- * client library to determine how best to use the available buffers (e.g.,
- * large buffers can be used for image transfer).
- *
- * \param inode device inode.
- * \param file_priv DRM file private.
- * \param cmd command.
- * \param arg pointer to a drm_buf_info structure.
- * \return zero on success or a negative number on failure.
- *
- * Increments drm_device::buf_use while holding the drm_device::count_lock
- * lock, preventing of allocating more buffers after this call. Information
- * about each requested buffer is then copied into user space.
- */
-int drm_infobufs(struct drm_device *dev, void *data,
- struct drm_file *file_priv)
-{
- struct drm_device_dma *dma = dev->dma;
- struct drm_buf_info *request = data;
- int i;
- int count;
-
- if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA))
- return -EINVAL;
-
- 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);
-
- 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 __user *to =
- &request->list[count];
- struct drm_buf_entry *from = &dma->bufs[i];
- struct drm_freelist *list = &dma->bufs[i].freelist;
- if (copy_to_user(&to->count,
- &from->buf_count,
- sizeof(from->buf_count)) ||
- copy_to_user(&to->size,
- &from->buf_size,
- sizeof(from->buf_size)) ||
- copy_to_user(&to->low_mark,
- &list->low_mark,
- sizeof(list->low_mark)) ||
- copy_to_user(&to->high_mark,
- &list->high_mark,
- sizeof(list->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;
-
- return 0;
-}
-
-/**
- * Specifies a low and high water mark for buffer allocation
- *
- * \param inode device inode.
- * \param file_priv DRM file private.
- * \param cmd command.
- * \param arg a pointer to a drm_buf_desc structure.
- * \return zero on success or a negative number on failure.
- *
- * Verifies that the size order is bounded between the admissible orders and
- * updates the respective drm_device_dma::bufs entry low and high water mark.
- *
- * \note This ioctl is deprecated and mostly never used.
- */
-int drm_markbufs(struct drm_device *dev, void *data,
- struct drm_file *file_priv)
-{
- struct drm_device_dma *dma = dev->dma;
- struct drm_buf_desc *request = data;
- int order;
- struct drm_buf_entry *entry;
-
- if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA))
- return -EINVAL;
-
- if (!dma)
- return -EINVAL;
-
- 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;
-}
-
-/**
- * Unreserve the buffers in list, previously reserved using drmDMA.
- *
- * \param inode device inode.
- * \param file_priv DRM file private.
- * \param cmd command.
- * \param arg pointer to a drm_buf_free structure.
- * \return zero on success or a negative number on failure.
- *
- * Calls free_buffer() for each used buffer.
- * This function is primarily used for debugging.
- */
-int drm_freebufs(struct drm_device *dev, void *data,
- struct drm_file *file_priv)
-{
- struct drm_device_dma *dma = dev->dma;
- struct drm_buf_free *request = data;
- int i;
- int idx;
- struct drm_buf *buf;
-
- if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA))
- return -EINVAL;
-
- if (!dma)
- return -EINVAL;
-
- 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->file_priv != file_priv) {
- DRM_ERROR("Process %d freeing buffer not owned\n",
- task_pid_nr(current));
- return -EINVAL;
- }
- drm_free_buffer(dev, buf);
- }
-
- return 0;
-}
-
-/**
- * Maps all of the DMA buffers into client-virtual space (ioctl).
- *
- * \param inode device inode.
- * \param file_priv DRM file private.
- * \param cmd command.
- * \param arg pointer to a drm_buf_map structure.
- * \return zero on success or a negative number on failure.
- *
- * Maps the AGP, SG or PCI buffer region with do_mmap(), and copies information
- * about each buffer into user space. For PCI buffers, it calls do_mmap() with
- * offset equal to 0, which drm_mmap() interpretes as PCI buffers and calls
- * drm_mmap_dma().
- */
-int drm_mapbufs(struct drm_device *dev, void *data,
- struct drm_file *file_priv)
-{
- struct drm_device_dma *dma = dev->dma;
- int retcode = 0;
- const int zero = 0;
- unsigned long virtual;
- unsigned long address;
- struct drm_buf_map *request = data;
- int i;
-
- if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA))
- return -EINVAL;
-
- 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 (request->count >= dma->buf_count) {
- 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_core_check_feature(dev, DRIVER_FB_DMA)
- && (dma->flags & _DRM_DMA_USE_FB))) {
- struct drm_map *map = dev->agp_buffer_map;
- unsigned long token = dev->agp_buffer_token;
-
- if (!map) {
- retcode = -EINVAL;
- goto done;
- }
- down_write(&current->mm->mmap_sem);
- virtual = do_mmap(file_priv->filp, 0, map->size,
- PROT_READ | PROT_WRITE,
- MAP_SHARED,
- token);
- up_write(&current->mm->mmap_sem);
- } else {
- down_write(&current->mm->mmap_sem);
- virtual = do_mmap(file_priv->filp, 0, dma->byte_count,
- PROT_READ | PROT_WRITE,
- MAP_SHARED, 0);
- up_write(&current->mm->mmap_sem);
- }
- if (virtual > -1024UL) {
- /* Real error */
- retcode = (signed long)virtual;
- goto done;
- }
- request->virtual = (void __user *)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);
-
- return retcode;
-}
-
-/**
- * Compute size order. Returns the exponent of the smaller power of two which
- * is greater or equal to given number.
- *
- * \param size size.
- * \return order.
- *
- * \todo Can be made faster.
- */
-int drm_order(unsigned long size)
-{
- int order;
- unsigned long tmp;
-
- for (order = 0, tmp = size >> 1; tmp; tmp >>= 1, order++) ;
-
- if (size & (size - 1))
- ++order;
-
- return order;
-}
-EXPORT_SYMBOL(drm_order);