diff options
Diffstat (limited to 'drivers/char/drm/drm_bufs.c')
| -rw-r--r-- | drivers/char/drm/drm_bufs.c | 1601 |
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 bde64b84166e..000000000000 --- 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(¤t->mm->mmap_sem); - virtual = do_mmap(file_priv->filp, 0, map->size, - PROT_READ | PROT_WRITE, - MAP_SHARED, - token); - up_write(¤t->mm->mmap_sem); - } else { - down_write(¤t->mm->mmap_sem); - virtual = do_mmap(file_priv->filp, 0, dma->byte_count, - PROT_READ | PROT_WRITE, - MAP_SHARED, 0); - up_write(¤t->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); |
