diff options
Diffstat (limited to 'nx-X11/extras/drm/linux-core/drm_bufs.c')
| -rw-r--r-- | nx-X11/extras/drm/linux-core/drm_bufs.c | 1676 |
1 files changed, 0 insertions, 1676 deletions
diff --git a/nx-X11/extras/drm/linux-core/drm_bufs.c b/nx-X11/extras/drm/linux-core/drm_bufs.c deleted file mode 100644 index 5e70e47f2..000000000 --- a/nx-X11/extras/drm/linux-core/drm_bufs.c +++ /dev/null @@ -1,1676 +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(drm_device_t *dev, unsigned int resource) -{ - return pci_resource_start(dev->pdev, resource); -} -EXPORT_SYMBOL(drm_get_resource_start); - -unsigned long drm_get_resource_len(drm_device_t *dev, unsigned int resource) -{ - return pci_resource_len(dev->pdev, resource); -} -EXPORT_SYMBOL(drm_get_resource_len); - -static drm_map_list_t *drm_find_matching_map(drm_device_t *dev, - drm_local_map_t *map) -{ - struct list_head *list; - - list_for_each(list, &dev->maplist->head) { - drm_map_list_t *entry = list_entry(list, drm_map_list_t, 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; -} - - -/* - * Used to allocate 32-bit handles for mappings. - */ -#define START_RANGE 0x10000000 -#define END_RANGE 0x40000000 - -#ifdef _LP64 -static __inline__ unsigned int HandleID(unsigned long lhandle, drm_device_t *dev) -{ - static unsigned int map32_handle = START_RANGE; - unsigned int hash; - - if (lhandle & 0xffffffff00000000) { - hash = map32_handle; - map32_handle += PAGE_SIZE; - if (map32_handle > END_RANGE) - map32_handle = START_RANGE; - } else - hash = lhandle; - - while (1) { - drm_map_list_t *_entry; - list_for_each_entry(_entry, &dev->maplist->head,head) { - if (_entry->user_token == hash) - break; - } - if (&_entry->head == &dev->maplist->head) - return hash; - - hash += PAGE_SIZE; - map32_handle += PAGE_SIZE; - } -} -#else -# define HandleID(x,dev) (unsigned int)(x) -#endif - -/** - * Ioctl to specify a range of memory that is available for mapping by a non-root process. - * - * \param inode device inode. - * \param filp file pointer. - * \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. - */ -int drm_addmap_core(drm_device_t * dev, unsigned int offset, - unsigned int size, drm_map_type_t type, - drm_map_flags_t flags, drm_map_list_t ** maplist) -{ - drm_map_t *map; - drm_map_list_t *list; - drm_dma_handle_t *dmah; - - 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 < 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 = drm_ioremap(map->offset, map->size, dev); - 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_32(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: { - drm_agp_mem_t *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 - /* Note: dev->agp->base may actually be 0 when the DRM - * is not in control of AGP space. But if user space is - * it should already have added the AGP base itself. - */ - 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 - */ - 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 (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) { - drm_free(map, sizeof(*map), DRM_MEM_MAPS); - return -EINVAL; - } - memset(list, 0, sizeof(*list)); - list->map = map; - - down(&dev->struct_sem); - list_add(&list->head, &dev->maplist->head); - /* Assign a 32-bit handle */ - /* We do it here so that dev->struct_sem protects the increment */ - list->user_token = HandleID(map->type==_DRM_SHM - ? (unsigned long)map->handle - : map->offset, dev); - up(&dev->struct_sem); - - *maplist = list; - return 0; -} - -int drm_addmap(drm_device_t * dev, unsigned int offset, - unsigned int size, drm_map_type_t type, - drm_map_flags_t flags, drm_local_map_t ** map_ptr) -{ - drm_map_list_t *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 inode *inode, struct file *filp, - unsigned int cmd, unsigned long arg) -{ - drm_file_t *priv = filp->private_data; - drm_device_t *dev = priv->head->dev; - drm_map_t map; - drm_map_list_t *maplist; - drm_map_t __user *argp = (void __user *)arg; - int err; - - if (!(filp->f_mode & 3)) - return -EACCES; /* Require read/write */ - - if (copy_from_user(& map, argp, sizeof(map))) { - return -EFAULT; - } - - 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; - - if (copy_to_user(argp, maplist->map, sizeof(drm_map_t))) - return -EFAULT; - if (put_user((void *)maplist->user_token, &argp->handle)) - return -EFAULT; - return 0; -} - -/** - * Remove a map private from list and deallocate resources if the mapping - * isn't in use. - * - * \param inode device inode. - * \param filp file pointer. - * \param cmd command. - * \param arg pointer to a drm_map_t 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(drm_device_t *dev, drm_local_map_t *map) -{ - struct list_head *list; - drm_map_list_t *r_list = NULL; - drm_dma_handle_t dmah; - - /* Find the list entry for the map and remove it */ - list_for_each(list, &dev->maplist->head) { - r_list = list_entry(list, drm_map_list_t, head); - - if (r_list->map == map) { - list_del(list); - drm_free(list, sizeof(*list), DRM_MEM_MAPS); - break; - } - } - - /* List has wrapped around to the head pointer, or it's empty and we - * didn't find anything. - */ - if (list == (&dev->maplist->head)) { - return -EINVAL; - } - - switch (map->type) { - case _DRM_REGISTERS: - drm_ioremapfree(map->handle, map->size, dev); - /* 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; -} -EXPORT_SYMBOL(drm_rmmap_locked); - -int drm_rmmap(drm_device_t *dev, drm_local_map_t *map) -{ - int ret; - - down(&dev->struct_sem); - ret = drm_rmmap_locked(dev, map); - up(&dev->struct_sem); - - 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 inode *inode, struct file *filp, - unsigned int cmd, unsigned long arg) -{ - drm_file_t *priv = filp->private_data; - drm_device_t *dev = priv->head->dev; - drm_map_t request; - drm_local_map_t *map = NULL; - struct list_head *list; - int ret; - - if (copy_from_user(&request, (drm_map_t __user *) arg, sizeof(request))) { - return -EFAULT; - } - - down(&dev->struct_sem); - list_for_each(list, &dev->maplist->head) { - drm_map_list_t *r_list = list_entry(list, drm_map_list_t, 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 == (&dev->maplist->head)) { - up(&dev->struct_sem); - return -EINVAL; - } - - if (!map) - return -EINVAL; - - /* Register and framebuffer maps are permanent */ - if ((map->type == _DRM_REGISTERS) || (map->type == _DRM_FRAME_BUFFER)) { - up(&dev->struct_sem); - return 0; - } - - ret = drm_rmmap_locked(dev, map); - - up(&dev->struct_sem); - - 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(drm_device_t * dev, drm_buf_entry_t * entry) -{ - int i; - - if (entry->seg_count) { - for (i = 0; i < entry->seg_count; i++) { - if (entry->seglist[i]) { - drm_free_pages(entry->seglist[i], - entry->page_order, DRM_MEM_DMA); - } - } - 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 drm_device_t to which the buffers are to be added. - * \param request pointer to a drm_buf_desc_t 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(drm_device_t * dev, drm_buf_desc_t * request) -{ - drm_device_dma_t *dma = dev->dma; - drm_buf_entry_t *entry; - drm_agp_mem_t *agp_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, valid; - drm_buf_t **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; - 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 (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); - - down(&dev->struct_sem); - entry = &dma->bufs[order]; - if (entry->buf_count) { - up(&dev->struct_sem); - atomic_dec(&dev->buf_alloc); - return -ENOMEM; /* May only call once for each order */ - } - - if (count < 0 || count > 4096) { - up(&dev->struct_sem); - atomic_dec(&dev->buf_alloc); - return -EINVAL; - } - - entry->buflist = drm_alloc(count * sizeof(*entry->buflist), - DRM_MEM_BUFS); - if (!entry->buflist) { - up(&dev->struct_sem); - atomic_dec(&dev->buf_alloc); - return -ENOMEM; - } - memset(entry->buflist, 0, count * sizeof(*entry->buflist)); - - entry->buf_size = size; - entry->page_order = page_order; - - offset = 0; - - while (entry->buf_count < count) { - buf = &entry->buflist[entry->buf_count]; - buf->idx = dma->buf_count + entry->buf_count; - buf->total = alignment; - buf->order = order; - buf->used = 0; - - buf->offset = (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->filp = 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); - up(&dev->struct_sem); - 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); - up(&dev->struct_sem); - 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); - - up(&dev->struct_sem); - - 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(drm_device_t * dev, drm_buf_desc_t * request) -{ - drm_device_dma_t *dma = dev->dma; - int count; - int order; - int size; - int total; - int page_order; - drm_buf_entry_t *entry; - unsigned long page; - 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; - - 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); - - down(&dev->struct_sem); - entry = &dma->bufs[order]; - if (entry->buf_count) { - up(&dev->struct_sem); - atomic_dec(&dev->buf_alloc); - return -ENOMEM; /* May only call once for each order */ - } - - if (count < 0 || count > 4096) { - up(&dev->struct_sem); - atomic_dec(&dev->buf_alloc); - return -EINVAL; - } - - entry->buflist = drm_alloc(count * sizeof(*entry->buflist), - DRM_MEM_BUFS); - if (!entry->buflist) { - up(&dev->struct_sem); - atomic_dec(&dev->buf_alloc); - return -ENOMEM; - } - memset(entry->buflist, 0, count * sizeof(*entry->buflist)); - - entry->seglist = drm_alloc(count * sizeof(*entry->seglist), - DRM_MEM_SEGS); - if (!entry->seglist) { - drm_free(entry->buflist, - count * sizeof(*entry->buflist), DRM_MEM_BUFS); - up(&dev->struct_sem); - 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); - up(&dev->struct_sem); - 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) { - page = drm_alloc_pages(page_order, DRM_MEM_DMA); - if (!page) { - /* 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); - up(&dev->struct_sem); - atomic_dec(&dev->buf_alloc); - return -ENOMEM; - } - entry->seglist[entry->seg_count++] = page; - for (i = 0; i < (1 << page_order); i++) { - DRM_DEBUG("page %d @ 0x%08lx\n", - dma->page_count + page_count, - page + PAGE_SIZE * i); - temp_pagelist[dma->page_count + page_count++] - = page + 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 *)(page + offset); - buf->next = NULL; - buf->waiting = 0; - buf->pending = 0; - init_waitqueue_head(&buf->dma_wait); - buf->filp = NULL; - - buf->dev_priv_size = dev->driver->dev_priv_size; - buf->dev_private = drm_alloc(dev->driver->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); - up(&dev->struct_sem); - 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); - up(&dev->struct_sem); - 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); - - up(&dev->struct_sem); - - request->count = entry->buf_count; - request->size = size; - - atomic_dec(&dev->buf_alloc); - return 0; - -} -EXPORT_SYMBOL(drm_addbufs_pci); - -static int drm_addbufs_sg(drm_device_t * dev, drm_buf_desc_t * request) -{ - drm_device_dma_t *dma = dev->dma; - drm_buf_entry_t *entry; - drm_buf_t *buf; - unsigned long offset; - unsigned long agp_offset; - int count; - int order; - int size; - int alignment; - int page_order; - int total; - int byte_count; - int i; - drm_buf_t **temp_buflist; - - 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); - - down(&dev->struct_sem); - entry = &dma->bufs[order]; - if (entry->buf_count) { - up(&dev->struct_sem); - atomic_dec(&dev->buf_alloc); - return -ENOMEM; /* May only call once for each order */ - } - - if (count < 0 || count > 4096) { - up(&dev->struct_sem); - atomic_dec(&dev->buf_alloc); - return -EINVAL; - } - - entry->buflist = drm_alloc(count * sizeof(*entry->buflist), - DRM_MEM_BUFS); - if (!entry->buflist) { - up(&dev->struct_sem); - atomic_dec(&dev->buf_alloc); - return -ENOMEM; - } - memset(entry->buflist, 0, count * sizeof(*entry->buflist)); - - entry->buf_size = size; - entry->page_order = page_order; - - offset = 0; - - while (entry->buf_count < count) { - buf = &entry->buflist[entry->buf_count]; - buf->idx = dma->buf_count + entry->buf_count; - buf->total = alignment; - buf->order = order; - buf->used = 0; - - buf->offset = (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->filp = NULL; - - buf->dev_priv_size = dev->driver->dev_priv_size; - buf->dev_private = drm_alloc(dev->driver->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); - up(&dev->struct_sem); - 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); - up(&dev->struct_sem); - 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); - - up(&dev->struct_sem); - - request->count = entry->buf_count; - request->size = size; - - dma->flags = _DRM_DMA_USE_SG; - - atomic_dec(&dev->buf_alloc); - return 0; -} - - -int drm_addbufs_fb(drm_device_t * dev, drm_buf_desc_t * request) -{ - drm_device_dma_t *dma = dev->dma; - drm_buf_entry_t *entry; - drm_buf_t *buf; - unsigned long offset; - unsigned long agp_offset; - int count; - int order; - int size; - int alignment; - int page_order; - int total; - int byte_count; - int i; - drm_buf_t **temp_buflist; - - 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); - - down(&dev->struct_sem); - entry = &dma->bufs[order]; - if (entry->buf_count) { - up(&dev->struct_sem); - atomic_dec(&dev->buf_alloc); - return -ENOMEM; /* May only call once for each order */ - } - - if (count < 0 || count > 4096) { - up(&dev->struct_sem); - atomic_dec(&dev->buf_alloc); - return -EINVAL; - } - - entry->buflist = drm_alloc(count * sizeof(*entry->buflist), - DRM_MEM_BUFS); - if (!entry->buflist) { - up(&dev->struct_sem); - atomic_dec(&dev->buf_alloc); - return -ENOMEM; - } - memset(entry->buflist, 0, count * sizeof(*entry->buflist)); - - entry->buf_size = size; - entry->page_order = page_order; - - offset = 0; - - while (entry->buf_count < count) { - buf = &entry->buflist[entry->buf_count]; - buf->idx = dma->buf_count + entry->buf_count; - buf->total = alignment; - buf->order = order; - buf->used = 0; - - buf->offset = (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->filp = 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); - up(&dev->struct_sem); - 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); - up(&dev->struct_sem); - 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); - - up(&dev->struct_sem); - - request->count = entry->buf_count; - request->size = size; - - dma->flags = _DRM_DMA_USE_FB; - - atomic_dec(&dev->buf_alloc); - return 0; -} -EXPORT_SYMBOL(drm_addbufs_fb); - - -/** - * Add buffers for DMA transfers (ioctl). - * - * \param inode device inode. - * \param filp file pointer. - * \param cmd command. - * \param arg pointer to a drm_buf_desc_t 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 inode *inode, struct file *filp, - unsigned int cmd, unsigned long arg) -{ - drm_buf_desc_t request; - drm_file_t *priv = filp->private_data; - drm_device_t *dev = priv->head->dev; - int ret; - - - if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) - return -EINVAL; - - if (copy_from_user(&request, (drm_buf_desc_t __user *) arg, - sizeof(request))) - return -EFAULT; - -#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); - - if (ret == 0) { - if (copy_to_user( (void __user *) arg, &request, - sizeof(request))) { - ret = -EFAULT; - } - } - - 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 filp file pointer. - * \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 inode *inode, struct file *filp, - unsigned int cmd, unsigned long arg) -{ - drm_file_t *priv = filp->private_data; - drm_device_t *dev = priv->head->dev; - drm_device_dma_t *dma = dev->dma; - drm_buf_info_t request; - drm_buf_info_t __user *argp = (void __user *)arg; - 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); - - if (copy_from_user(&request, argp, sizeof(request))) - return -EFAULT; - - for (i = 0, count = 0; i < DRM_MAX_ORDER + 1; i++) { - if (dma->bufs[i].buf_count) - ++count; - } - - DRM_DEBUG("count = %d\n", count); - - if (request.count >= count) { - for (i = 0, count = 0; i < DRM_MAX_ORDER + 1; i++) { - if (dma->bufs[i].buf_count) { - drm_buf_desc_t __user *to = - &request.list[count]; - drm_buf_entry_t *from = &dma->bufs[i]; - drm_freelist_t *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; - - if (copy_to_user(argp, &request, sizeof(request))) - return -EFAULT; - - return 0; -} - -/** - * Specifies a low and high water mark for buffer allocation - * - * \param inode device inode. - * \param filp file pointer. - * \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 inode *inode, struct file *filp, - unsigned int cmd, unsigned long arg) -{ - drm_file_t *priv = filp->private_data; - drm_device_t *dev = priv->head->dev; - drm_device_dma_t *dma = dev->dma; - drm_buf_desc_t request; - int order; - drm_buf_entry_t *entry; - - if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) - return -EINVAL; - - if (!dma) - return -EINVAL; - - if (copy_from_user(&request, - (drm_buf_desc_t __user *) arg, sizeof(request))) - return -EFAULT; - - DRM_DEBUG("%d, %d, %d\n", - request.size, request.low_mark, request.high_mark); - order = drm_order(request.size); - if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) - return -EINVAL; - entry = &dma->bufs[order]; - - if (request.low_mark < 0 || request.low_mark > entry->buf_count) - return -EINVAL; - if (request.high_mark < 0 || request.high_mark > entry->buf_count) - return -EINVAL; - - entry->freelist.low_mark = request.low_mark; - entry->freelist.high_mark = request.high_mark; - - return 0; -} - -/** - * Unreserve the buffers in list, previously reserved using drmDMA. - * - * \param inode device inode. - * \param filp file pointer. - * \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 inode *inode, struct file *filp, - unsigned int cmd, unsigned long arg) -{ - drm_file_t *priv = filp->private_data; - drm_device_t *dev = priv->head->dev; - drm_device_dma_t *dma = dev->dma; - drm_buf_free_t request; - int i; - int idx; - drm_buf_t *buf; - - if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) - return -EINVAL; - - if (!dma) - return -EINVAL; - - if (copy_from_user(&request, - (drm_buf_free_t __user *) arg, sizeof(request))) - return -EFAULT; - - DRM_DEBUG("%d\n", request.count); - for (i = 0; i < request.count; i++) { - if (copy_from_user(&idx, &request.list[i], sizeof(idx))) - return -EFAULT; - if (idx < 0 || idx >= dma->buf_count) { - DRM_ERROR("Index %d (of %d max)\n", - idx, dma->buf_count - 1); - return -EINVAL; - } - buf = dma->buflist[idx]; - if (buf->filp != filp) { - DRM_ERROR("Process %d freeing buffer not owned\n", - current->pid); - 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 filp file pointer. - * \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 or SG buffer region with do_mmap(), and copies information - * about each buffer into user space. The PCI buffers are already mapped on the - * addbufs_pci() call. - */ -int drm_mapbufs(struct inode *inode, struct file *filp, - unsigned int cmd, unsigned long arg) -{ - drm_file_t *priv = filp->private_data; - drm_device_t *dev = priv->head->dev; - drm_device_dma_t *dma = dev->dma; - drm_buf_map_t __user *argp = (void __user *)arg; - int retcode = 0; - const int zero = 0; - unsigned long virtual; - unsigned long address; - drm_buf_map_t request; - 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 (copy_from_user(&request, argp, sizeof(request))) - return -EFAULT; - - 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))) { - drm_map_t *map = dev->agp_buffer_map; - unsigned long token = dev->agp_buffer_token; - - if (!map) { - retcode = -EINVAL; - goto done; - } -#if LINUX_VERSION_CODE <= 0x020402 - down(¤t->mm->mmap_sem); -#else - down_write(¤t->mm->mmap_sem); -#endif - virtual = do_mmap(filp, 0, map->size, - PROT_READ | PROT_WRITE, - MAP_SHARED, - token); -#if LINUX_VERSION_CODE <= 0x020402 - up(¤t->mm->mmap_sem); -#else - up_write(¤t->mm->mmap_sem); -#endif - } else { -#if LINUX_VERSION_CODE <= 0x020402 - down(¤t->mm->mmap_sem); -#else - down_write(¤t->mm->mmap_sem); -#endif - virtual = do_mmap(filp, 0, dma->byte_count, - PROT_READ | PROT_WRITE, - MAP_SHARED, 0); -#if LINUX_VERSION_CODE <= 0x020402 - up(¤t->mm->mmap_sem); -#else - up_write(¤t->mm->mmap_sem); -#endif - } - 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); - - if (copy_to_user(argp, &request, sizeof(request))) - return -EFAULT; - - 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); - - |