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![Daniel Vetter](/assets/img/avatar_default.png)
We already express the drm/agp depencies correctly in Kconfig, so we can rip this remnant from the shared drm core days. Aside: Pretty much all the #ifdefs in radeon/nouveau could be killed if ttm would provide dummy functions. I'm not going to volunteer for that though. v2: Use IS_ENABLED(CONFIG_AGP) as suggested by Ville v3: Polish from Ville's review. Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Reviewed-by: Christian König <christian.koenig@amd.com> (v2) Reviewed-by: David Herrmann <dh.herrmann@gmail.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
1473 lines
39 KiB
C
1473 lines
39 KiB
C
/*
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* Legacy: Generic DRM Buffer Management
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*
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* Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas.
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* Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
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* All Rights Reserved.
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*
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* Author: Rickard E. (Rik) Faith <faith@valinux.com>
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* Author: Gareth Hughes <gareth@valinux.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <linux/vmalloc.h>
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#include <linux/slab.h>
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#include <linux/log2.h>
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#include <linux/export.h>
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#include <asm/shmparam.h>
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#include <drm/drmP.h>
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#include "drm_legacy.h"
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static struct drm_map_list *drm_find_matching_map(struct drm_device *dev,
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struct drm_local_map *map)
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{
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struct drm_map_list *entry;
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list_for_each_entry(entry, &dev->maplist, head) {
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/*
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* Because the kernel-userspace ABI is fixed at a 32-bit offset
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* while PCI resources may live above that, we only compare the
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* lower 32 bits of the map offset for maps of type
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* _DRM_FRAMEBUFFER or _DRM_REGISTERS.
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* It is assumed that if a driver have more than one resource
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* of each type, the lower 32 bits are different.
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*/
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if (!entry->map ||
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map->type != entry->map->type ||
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entry->master != dev->primary->master)
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continue;
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switch (map->type) {
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case _DRM_SHM:
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if (map->flags != _DRM_CONTAINS_LOCK)
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break;
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return entry;
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case _DRM_REGISTERS:
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case _DRM_FRAME_BUFFER:
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if ((entry->map->offset & 0xffffffff) ==
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(map->offset & 0xffffffff))
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return entry;
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default: /* Make gcc happy */
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;
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}
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if (entry->map->offset == map->offset)
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return entry;
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}
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return NULL;
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}
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static int drm_map_handle(struct drm_device *dev, struct drm_hash_item *hash,
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unsigned long user_token, int hashed_handle, int shm)
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{
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int use_hashed_handle, shift;
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unsigned long add;
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#if (BITS_PER_LONG == 64)
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use_hashed_handle = ((user_token & 0xFFFFFFFF00000000UL) || hashed_handle);
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#elif (BITS_PER_LONG == 32)
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use_hashed_handle = hashed_handle;
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#else
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#error Unsupported long size. Neither 64 nor 32 bits.
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#endif
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if (!use_hashed_handle) {
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int ret;
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hash->key = user_token >> PAGE_SHIFT;
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ret = drm_ht_insert_item(&dev->map_hash, hash);
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if (ret != -EINVAL)
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return ret;
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}
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shift = 0;
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add = DRM_MAP_HASH_OFFSET >> PAGE_SHIFT;
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if (shm && (SHMLBA > PAGE_SIZE)) {
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int bits = ilog2(SHMLBA >> PAGE_SHIFT) + 1;
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/* For shared memory, we have to preserve the SHMLBA
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* bits of the eventual vma->vm_pgoff value during
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* mmap(). Otherwise we run into cache aliasing problems
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* on some platforms. On these platforms, the pgoff of
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* a mmap() request is used to pick a suitable virtual
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* address for the mmap() region such that it will not
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* cause cache aliasing problems.
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*
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* Therefore, make sure the SHMLBA relevant bits of the
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* hash value we use are equal to those in the original
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* kernel virtual address.
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*/
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shift = bits;
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add |= ((user_token >> PAGE_SHIFT) & ((1UL << bits) - 1UL));
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}
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return drm_ht_just_insert_please(&dev->map_hash, hash,
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user_token, 32 - PAGE_SHIFT - 3,
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shift, add);
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}
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/**
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* Core function to create a range of memory available for mapping by a
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* non-root process.
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*
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* Adjusts the memory offset to its absolute value according to the mapping
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* type. Adds the map to the map list drm_device::maplist. Adds MTRR's where
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* applicable and if supported by the kernel.
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*/
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static int drm_addmap_core(struct drm_device * dev, resource_size_t offset,
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unsigned int size, enum drm_map_type type,
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enum drm_map_flags flags,
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struct drm_map_list ** maplist)
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{
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struct drm_local_map *map;
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struct drm_map_list *list;
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drm_dma_handle_t *dmah;
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unsigned long user_token;
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int ret;
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map = kmalloc(sizeof(*map), GFP_KERNEL);
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if (!map)
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return -ENOMEM;
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map->offset = offset;
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map->size = size;
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map->flags = flags;
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map->type = type;
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/* Only allow shared memory to be removable since we only keep enough
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* book keeping information about shared memory to allow for removal
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* when processes fork.
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*/
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if ((map->flags & _DRM_REMOVABLE) && map->type != _DRM_SHM) {
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kfree(map);
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return -EINVAL;
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}
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DRM_DEBUG("offset = 0x%08llx, size = 0x%08lx, type = %d\n",
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(unsigned long long)map->offset, map->size, map->type);
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/* page-align _DRM_SHM maps. They are allocated here so there is no security
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* hole created by that and it works around various broken drivers that use
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* a non-aligned quantity to map the SAREA. --BenH
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*/
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if (map->type == _DRM_SHM)
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map->size = PAGE_ALIGN(map->size);
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if ((map->offset & (~(resource_size_t)PAGE_MASK)) || (map->size & (~PAGE_MASK))) {
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kfree(map);
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return -EINVAL;
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}
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map->mtrr = -1;
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map->handle = NULL;
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switch (map->type) {
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case _DRM_REGISTERS:
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case _DRM_FRAME_BUFFER:
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#if !defined(__sparc__) && !defined(__alpha__) && !defined(__ia64__) && !defined(__powerpc64__) && !defined(__x86_64__) && !defined(__arm__)
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if (map->offset + (map->size-1) < map->offset ||
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map->offset < virt_to_phys(high_memory)) {
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kfree(map);
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return -EINVAL;
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}
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#endif
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/* Some drivers preinitialize some maps, without the X Server
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* needing to be aware of it. Therefore, we just return success
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* when the server tries to create a duplicate map.
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*/
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list = drm_find_matching_map(dev, map);
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if (list != NULL) {
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if (list->map->size != map->size) {
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DRM_DEBUG("Matching maps of type %d with "
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"mismatched sizes, (%ld vs %ld)\n",
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map->type, map->size,
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list->map->size);
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list->map->size = map->size;
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}
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kfree(map);
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*maplist = list;
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return 0;
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}
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if (map->type == _DRM_FRAME_BUFFER ||
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(map->flags & _DRM_WRITE_COMBINING)) {
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map->mtrr =
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arch_phys_wc_add(map->offset, map->size);
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}
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if (map->type == _DRM_REGISTERS) {
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if (map->flags & _DRM_WRITE_COMBINING)
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map->handle = ioremap_wc(map->offset,
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map->size);
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else
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map->handle = ioremap(map->offset, map->size);
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if (!map->handle) {
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kfree(map);
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return -ENOMEM;
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}
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}
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break;
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case _DRM_SHM:
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list = drm_find_matching_map(dev, map);
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if (list != NULL) {
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if(list->map->size != map->size) {
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DRM_DEBUG("Matching maps of type %d with "
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"mismatched sizes, (%ld vs %ld)\n",
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map->type, map->size, list->map->size);
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list->map->size = map->size;
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}
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kfree(map);
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*maplist = list;
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return 0;
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}
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map->handle = vmalloc_user(map->size);
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DRM_DEBUG("%lu %d %p\n",
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map->size, order_base_2(map->size), map->handle);
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if (!map->handle) {
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kfree(map);
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return -ENOMEM;
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}
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map->offset = (unsigned long)map->handle;
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if (map->flags & _DRM_CONTAINS_LOCK) {
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/* Prevent a 2nd X Server from creating a 2nd lock */
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if (dev->primary->master->lock.hw_lock != NULL) {
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vfree(map->handle);
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kfree(map);
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return -EBUSY;
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}
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dev->sigdata.lock = dev->primary->master->lock.hw_lock = map->handle; /* Pointer to lock */
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}
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break;
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case _DRM_AGP: {
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struct drm_agp_mem *entry;
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int valid = 0;
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if (!dev->agp) {
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kfree(map);
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return -EINVAL;
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}
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#ifdef __alpha__
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map->offset += dev->hose->mem_space->start;
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#endif
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/* In some cases (i810 driver), user space may have already
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* added the AGP base itself, because dev->agp->base previously
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* only got set during AGP enable. So, only add the base
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* address if the map's offset isn't already within the
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* aperture.
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*/
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if (map->offset < dev->agp->base ||
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map->offset > dev->agp->base +
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dev->agp->agp_info.aper_size * 1024 * 1024 - 1) {
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map->offset += dev->agp->base;
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}
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map->mtrr = dev->agp->agp_mtrr; /* for getmap */
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/* This assumes the DRM is in total control of AGP space.
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* It's not always the case as AGP can be in the control
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* of user space (i.e. i810 driver). So this loop will get
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* skipped and we double check that dev->agp->memory is
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* actually set as well as being invalid before EPERM'ing
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*/
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list_for_each_entry(entry, &dev->agp->memory, head) {
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if ((map->offset >= entry->bound) &&
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(map->offset + map->size <= entry->bound + entry->pages * PAGE_SIZE)) {
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valid = 1;
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break;
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}
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}
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if (!list_empty(&dev->agp->memory) && !valid) {
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kfree(map);
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return -EPERM;
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}
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DRM_DEBUG("AGP offset = 0x%08llx, size = 0x%08lx\n",
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(unsigned long long)map->offset, map->size);
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break;
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}
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case _DRM_SCATTER_GATHER:
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if (!dev->sg) {
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kfree(map);
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return -EINVAL;
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}
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map->offset += (unsigned long)dev->sg->virtual;
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break;
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case _DRM_CONSISTENT:
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/* dma_addr_t is 64bit on i386 with CONFIG_HIGHMEM64G,
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* As we're limiting the address to 2^32-1 (or less),
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* casting it down to 32 bits is no problem, but we
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* need to point to a 64bit variable first. */
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dmah = drm_pci_alloc(dev, map->size, map->size);
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if (!dmah) {
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kfree(map);
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return -ENOMEM;
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}
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map->handle = dmah->vaddr;
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map->offset = (unsigned long)dmah->busaddr;
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kfree(dmah);
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break;
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default:
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kfree(map);
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return -EINVAL;
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}
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list = kzalloc(sizeof(*list), GFP_KERNEL);
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if (!list) {
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if (map->type == _DRM_REGISTERS)
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iounmap(map->handle);
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kfree(map);
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return -EINVAL;
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}
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list->map = map;
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mutex_lock(&dev->struct_mutex);
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list_add(&list->head, &dev->maplist);
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/* Assign a 32-bit handle */
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/* We do it here so that dev->struct_mutex protects the increment */
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user_token = (map->type == _DRM_SHM) ? (unsigned long)map->handle :
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map->offset;
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ret = drm_map_handle(dev, &list->hash, user_token, 0,
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(map->type == _DRM_SHM));
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if (ret) {
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if (map->type == _DRM_REGISTERS)
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iounmap(map->handle);
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kfree(map);
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kfree(list);
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mutex_unlock(&dev->struct_mutex);
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return ret;
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}
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list->user_token = list->hash.key << PAGE_SHIFT;
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mutex_unlock(&dev->struct_mutex);
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if (!(map->flags & _DRM_DRIVER))
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list->master = dev->primary->master;
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*maplist = list;
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return 0;
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}
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int drm_legacy_addmap(struct drm_device * dev, resource_size_t offset,
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unsigned int size, enum drm_map_type type,
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enum drm_map_flags flags, struct drm_local_map **map_ptr)
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{
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struct drm_map_list *list;
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int rc;
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rc = drm_addmap_core(dev, offset, size, type, flags, &list);
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if (!rc)
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*map_ptr = list->map;
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return rc;
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}
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EXPORT_SYMBOL(drm_legacy_addmap);
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/**
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* Ioctl to specify a range of memory that is available for mapping by a
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* non-root process.
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*
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* \param inode device inode.
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* \param file_priv DRM file private.
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* \param cmd command.
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* \param arg pointer to a drm_map structure.
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* \return zero on success or a negative value on error.
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*
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*/
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int drm_legacy_addmap_ioctl(struct drm_device *dev, void *data,
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struct drm_file *file_priv)
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{
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struct drm_map *map = data;
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struct drm_map_list *maplist;
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int err;
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if (!(capable(CAP_SYS_ADMIN) || map->type == _DRM_AGP || map->type == _DRM_SHM))
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return -EPERM;
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err = drm_addmap_core(dev, map->offset, map->size, map->type,
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map->flags, &maplist);
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if (err)
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return err;
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/* avoid a warning on 64-bit, this casting isn't very nice, but the API is set so too late */
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map->handle = (void *)(unsigned long)maplist->user_token;
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/*
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* It appears that there are no users of this value whatsoever --
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* drmAddMap just discards it. Let's not encourage its use.
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* (Keeping drm_addmap_core's returned mtrr value would be wrong --
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* it's not a real mtrr index anymore.)
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*/
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map->mtrr = -1;
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return 0;
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}
|
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|
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/**
|
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* Remove a map private from list and deallocate resources if the mapping
|
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* isn't in use.
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*
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* Searches the map on drm_device::maplist, removes it from the list, see if
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* its being used, and free any associate resource (such as MTRR's) if it's not
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* being on use.
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*
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* \sa drm_legacy_addmap
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*/
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int drm_legacy_rmmap_locked(struct drm_device *dev, struct drm_local_map *map)
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{
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struct drm_map_list *r_list = NULL, *list_t;
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drm_dma_handle_t dmah;
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int found = 0;
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struct drm_master *master;
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|
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/* Find the list entry for the map and remove it */
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list_for_each_entry_safe(r_list, list_t, &dev->maplist, head) {
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if (r_list->map == map) {
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master = r_list->master;
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list_del(&r_list->head);
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drm_ht_remove_key(&dev->map_hash,
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r_list->user_token >> PAGE_SHIFT);
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kfree(r_list);
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found = 1;
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break;
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}
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}
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|
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if (!found)
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return -EINVAL;
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|
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switch (map->type) {
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case _DRM_REGISTERS:
|
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iounmap(map->handle);
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/* FALLTHROUGH */
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case _DRM_FRAME_BUFFER:
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arch_phys_wc_del(map->mtrr);
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break;
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case _DRM_SHM:
|
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vfree(map->handle);
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if (master) {
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if (dev->sigdata.lock == master->lock.hw_lock)
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dev->sigdata.lock = NULL;
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master->lock.hw_lock = NULL; /* SHM removed */
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master->lock.file_priv = NULL;
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wake_up_interruptible_all(&master->lock.lock_queue);
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}
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break;
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case _DRM_AGP:
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case _DRM_SCATTER_GATHER:
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break;
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case _DRM_CONSISTENT:
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dmah.vaddr = map->handle;
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dmah.busaddr = map->offset;
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dmah.size = map->size;
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__drm_legacy_pci_free(dev, &dmah);
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break;
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}
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kfree(map);
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|
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return 0;
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}
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|
EXPORT_SYMBOL(drm_legacy_rmmap_locked);
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|
|
int drm_legacy_rmmap(struct drm_device *dev, struct drm_local_map *map)
|
|
{
|
|
int ret;
|
|
|
|
mutex_lock(&dev->struct_mutex);
|
|
ret = drm_legacy_rmmap_locked(dev, map);
|
|
mutex_unlock(&dev->struct_mutex);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(drm_legacy_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.
|
|
*
|
|
* \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.
|
|
*/
|
|
int drm_legacy_rmmap_ioctl(struct drm_device *dev, void *data,
|
|
struct drm_file *file_priv)
|
|
{
|
|
struct drm_map *request = data;
|
|
struct drm_local_map *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_legacy_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]);
|
|
}
|
|
}
|
|
kfree(entry->seglist);
|
|
|
|
entry->seg_count = 0;
|
|
}
|
|
|
|
if (entry->buf_count) {
|
|
for (i = 0; i < entry->buf_count; i++) {
|
|
kfree(entry->buflist[i].dev_private);
|
|
}
|
|
kfree(entry->buflist);
|
|
|
|
entry->buf_count = 0;
|
|
}
|
|
}
|
|
|
|
#if IS_ENABLED(CONFIG_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_legacy_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 = order_base_2(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;
|
|
|
|
/* 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->buf_lock);
|
|
if (dev->buf_use) {
|
|
spin_unlock(&dev->buf_lock);
|
|
return -EBUSY;
|
|
}
|
|
atomic_inc(&dev->buf_alloc);
|
|
spin_unlock(&dev->buf_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 = kzalloc(count * sizeof(*entry->buflist), GFP_KERNEL);
|
|
if (!entry->buflist) {
|
|
mutex_unlock(&dev->struct_mutex);
|
|
atomic_dec(&dev->buf_alloc);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
entry->buf_size = size;
|
|
entry->page_order = page_order;
|
|
|
|
offset = 0;
|
|
|
|
while (entry->buf_count < count) {
|
|
buf = &entry->buflist[entry->buf_count];
|
|
buf->idx = dma->buf_count + entry->buf_count;
|
|
buf->total = alignment;
|
|
buf->order = order;
|
|
buf->used = 0;
|
|
|
|
buf->offset = (dma->byte_count + offset);
|
|
buf->bus_address = agp_offset + offset;
|
|
buf->address = (void *)(agp_offset + offset);
|
|
buf->next = NULL;
|
|
buf->waiting = 0;
|
|
buf->pending = 0;
|
|
buf->file_priv = NULL;
|
|
|
|
buf->dev_priv_size = dev->driver->dev_priv_size;
|
|
buf->dev_private = kzalloc(buf->dev_priv_size, GFP_KERNEL);
|
|
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;
|
|
}
|
|
|
|
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 = krealloc(dma->buflist,
|
|
(dma->buf_count + entry->buf_count) *
|
|
sizeof(*dma->buflist), GFP_KERNEL);
|
|
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_legacy_addbufs_agp);
|
|
#endif /* CONFIG_AGP */
|
|
|
|
int drm_legacy_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 = order_base_2(request->size);
|
|
size = 1 << order;
|
|
|
|
DRM_DEBUG("count=%d, size=%d (%d), order=%d\n",
|
|
request->count, request->size, size, order);
|
|
|
|
if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER)
|
|
return -EINVAL;
|
|
|
|
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->buf_lock);
|
|
if (dev->buf_use) {
|
|
spin_unlock(&dev->buf_lock);
|
|
return -EBUSY;
|
|
}
|
|
atomic_inc(&dev->buf_alloc);
|
|
spin_unlock(&dev->buf_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 = kzalloc(count * sizeof(*entry->buflist), GFP_KERNEL);
|
|
if (!entry->buflist) {
|
|
mutex_unlock(&dev->struct_mutex);
|
|
atomic_dec(&dev->buf_alloc);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
entry->seglist = kzalloc(count * sizeof(*entry->seglist), GFP_KERNEL);
|
|
if (!entry->seglist) {
|
|
kfree(entry->buflist);
|
|
mutex_unlock(&dev->struct_mutex);
|
|
atomic_dec(&dev->buf_alloc);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
/* Keep the original pagelist until we know all the allocations
|
|
* have succeeded
|
|
*/
|
|
temp_pagelist = kmalloc((dma->page_count + (count << page_order)) *
|
|
sizeof(*dma->pagelist), GFP_KERNEL);
|
|
if (!temp_pagelist) {
|
|
kfree(entry->buflist);
|
|
kfree(entry->seglist);
|
|
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);
|
|
|
|
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);
|
|
kfree(temp_pagelist);
|
|
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;
|
|
buf->file_priv = NULL;
|
|
|
|
buf->dev_priv_size = dev->driver->dev_priv_size;
|
|
buf->dev_private = kzalloc(buf->dev_priv_size,
|
|
GFP_KERNEL);
|
|
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);
|
|
kfree(temp_pagelist);
|
|
mutex_unlock(&dev->struct_mutex);
|
|
atomic_dec(&dev->buf_alloc);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
DRM_DEBUG("buffer %d @ %p\n",
|
|
entry->buf_count, buf->address);
|
|
}
|
|
byte_count += PAGE_SIZE << page_order;
|
|
}
|
|
|
|
temp_buflist = krealloc(dma->buflist,
|
|
(dma->buf_count + entry->buf_count) *
|
|
sizeof(*dma->buflist), GFP_KERNEL);
|
|
if (!temp_buflist) {
|
|
/* Free the entry because it isn't valid */
|
|
drm_cleanup_buf_error(dev, entry);
|
|
kfree(temp_pagelist);
|
|
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 original pagelist
|
|
* with the new one.
|
|
*/
|
|
if (dma->page_count) {
|
|
kfree(dma->pagelist);
|
|
}
|
|
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_legacy_addbufs_pci);
|
|
|
|
static int drm_legacy_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 = order_base_2(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;
|
|
|
|
spin_lock(&dev->buf_lock);
|
|
if (dev->buf_use) {
|
|
spin_unlock(&dev->buf_lock);
|
|
return -EBUSY;
|
|
}
|
|
atomic_inc(&dev->buf_alloc);
|
|
spin_unlock(&dev->buf_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 = kzalloc(count * sizeof(*entry->buflist),
|
|
GFP_KERNEL);
|
|
if (!entry->buflist) {
|
|
mutex_unlock(&dev->struct_mutex);
|
|
atomic_dec(&dev->buf_alloc);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
entry->buf_size = size;
|
|
entry->page_order = page_order;
|
|
|
|
offset = 0;
|
|
|
|
while (entry->buf_count < count) {
|
|
buf = &entry->buflist[entry->buf_count];
|
|
buf->idx = dma->buf_count + entry->buf_count;
|
|
buf->total = alignment;
|
|
buf->order = order;
|
|
buf->used = 0;
|
|
|
|
buf->offset = (dma->byte_count + offset);
|
|
buf->bus_address = agp_offset + offset;
|
|
buf->address = (void *)(agp_offset + offset
|
|
+ (unsigned long)dev->sg->virtual);
|
|
buf->next = NULL;
|
|
buf->waiting = 0;
|
|
buf->pending = 0;
|
|
buf->file_priv = NULL;
|
|
|
|
buf->dev_priv_size = dev->driver->dev_priv_size;
|
|
buf->dev_private = kzalloc(buf->dev_priv_size, GFP_KERNEL);
|
|
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;
|
|
}
|
|
|
|
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 = krealloc(dma->buflist,
|
|
(dma->buf_count + entry->buf_count) *
|
|
sizeof(*dma->buflist), GFP_KERNEL);
|
|
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;
|
|
}
|
|
|
|
/**
|
|
* 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_legacy_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_MODESET))
|
|
return -EINVAL;
|
|
|
|
if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA))
|
|
return -EINVAL;
|
|
|
|
#if IS_ENABLED(CONFIG_AGP)
|
|
if (request->flags & _DRM_AGP_BUFFER)
|
|
ret = drm_legacy_addbufs_agp(dev, request);
|
|
else
|
|
#endif
|
|
if (request->flags & _DRM_SG_BUFFER)
|
|
ret = drm_legacy_addbufs_sg(dev, request);
|
|
else if (request->flags & _DRM_FB_BUFFER)
|
|
ret = -EINVAL;
|
|
else
|
|
ret = drm_legacy_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::buf_lock
|
|
* lock, preventing of allocating more buffers after this call. Information
|
|
* about each requested buffer is then copied into user space.
|
|
*/
|
|
int drm_legacy_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_MODESET))
|
|
return -EINVAL;
|
|
|
|
if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA))
|
|
return -EINVAL;
|
|
|
|
if (!dma)
|
|
return -EINVAL;
|
|
|
|
spin_lock(&dev->buf_lock);
|
|
if (atomic_read(&dev->buf_alloc)) {
|
|
spin_unlock(&dev->buf_lock);
|
|
return -EBUSY;
|
|
}
|
|
++dev->buf_use; /* Can't allocate more after this call */
|
|
spin_unlock(&dev->buf_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];
|
|
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,
|
|
&from->low_mark,
|
|
sizeof(from->low_mark)) ||
|
|
copy_to_user(&to->high_mark,
|
|
&from->high_mark,
|
|
sizeof(from->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].low_mark,
|
|
dma->bufs[i].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_legacy_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_MODESET))
|
|
return -EINVAL;
|
|
|
|
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 = order_base_2(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->low_mark = request->low_mark;
|
|
entry->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_legacy_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_MODESET))
|
|
return -EINVAL;
|
|
|
|
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_legacy_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 vm_mmap(), and copies information
|
|
* about each buffer into user space. For PCI buffers, it calls vm_mmap() with
|
|
* offset equal to 0, which drm_mmap() interpretes as PCI buffers and calls
|
|
* drm_mmap_dma().
|
|
*/
|
|
int drm_legacy_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_MODESET))
|
|
return -EINVAL;
|
|
|
|
if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA))
|
|
return -EINVAL;
|
|
|
|
if (!dma)
|
|
return -EINVAL;
|
|
|
|
spin_lock(&dev->buf_lock);
|
|
if (atomic_read(&dev->buf_alloc)) {
|
|
spin_unlock(&dev->buf_lock);
|
|
return -EBUSY;
|
|
}
|
|
dev->buf_use++; /* Can't allocate more after this call */
|
|
spin_unlock(&dev->buf_lock);
|
|
|
|
if (request->count >= dma->buf_count) {
|
|
if ((dev->agp && (dma->flags & _DRM_DMA_USE_AGP))
|
|
|| (drm_core_check_feature(dev, DRIVER_SG)
|
|
&& (dma->flags & _DRM_DMA_USE_SG))) {
|
|
struct drm_local_map *map = dev->agp_buffer_map;
|
|
unsigned long token = dev->agp_buffer_token;
|
|
|
|
if (!map) {
|
|
retcode = -EINVAL;
|
|
goto done;
|
|
}
|
|
virtual = vm_mmap(file_priv->filp, 0, map->size,
|
|
PROT_READ | PROT_WRITE,
|
|
MAP_SHARED,
|
|
token);
|
|
} else {
|
|
virtual = vm_mmap(file_priv->filp, 0, dma->byte_count,
|
|
PROT_READ | PROT_WRITE,
|
|
MAP_SHARED, 0);
|
|
}
|
|
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;
|
|
}
|
|
|
|
int drm_legacy_dma_ioctl(struct drm_device *dev, void *data,
|
|
struct drm_file *file_priv)
|
|
{
|
|
if (drm_core_check_feature(dev, DRIVER_MODESET))
|
|
return -EINVAL;
|
|
|
|
if (dev->driver->dma_ioctl)
|
|
return dev->driver->dma_ioctl(dev, data, file_priv);
|
|
else
|
|
return -EINVAL;
|
|
}
|
|
|
|
struct drm_local_map *drm_legacy_getsarea(struct drm_device *dev)
|
|
{
|
|
struct drm_map_list *entry;
|
|
|
|
list_for_each_entry(entry, &dev->maplist, head) {
|
|
if (entry->map && entry->map->type == _DRM_SHM &&
|
|
(entry->map->flags & _DRM_CONTAINS_LOCK)) {
|
|
return entry->map;
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
EXPORT_SYMBOL(drm_legacy_getsarea);
|