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281856477c
The new arch_phys_wc_add/del functions do the right thing both with and without MTRR support in the kernel. So we can drop these additional checks. David Herrmann suggest to also kill the DRIVER_USE_MTRR flag since it's now unused, which spurred me to do a bit a better audit of the affected drivers. David helped a lot in that. Quoting our mail discussion: On Wed, Jul 10, 2013 at 5:41 PM, David Herrmann <dh.herrmann@gmail.com> wrote: > On Wed, Jul 10, 2013 at 5:22 PM, Daniel Vetter <daniel.vetter@ffwll.ch> wrote: >> On Wed, Jul 10, 2013 at 3:51 PM, David Herrmann <dh.herrmann@gmail.com> wrote: >>>> -#if __OS_HAS_MTRR >>>> -static inline int drm_core_has_MTRR(struct drm_device *dev) >>>> -{ >>>> - return drm_core_check_feature(dev, DRIVER_USE_MTRR); >>>> -} >>>> -#else >>>> -#define drm_core_has_MTRR(dev) (0) >>>> -#endif >>>> - >>> >>> That was the last user of DRIVER_USE_MTRR (apart from drivers setting >>> it in .driver_features). Any reason to keep it around? >> >> Yeah, I guess we could rip things out. Which will also force me to >> properly audit drivers for the eventual behaviour change this could >> entail (in case there's an x86 driver which did not ask for an mtrr, >> but iirc there isn't). > > david@david-mb ~/dev/kernel/linux $ for i in drivers/gpu/drm/* ; do if > test -d "$i" ; then if ! grep -q USE_MTRR -r $i ; then echo $i ; fi ; > fi ; done > drivers/gpu/drm/exynos > drivers/gpu/drm/gma500 > drivers/gpu/drm/i2c > drivers/gpu/drm/nouveau > drivers/gpu/drm/omapdrm > drivers/gpu/drm/qxl > drivers/gpu/drm/rcar-du > drivers/gpu/drm/shmobile > drivers/gpu/drm/tilcdc > drivers/gpu/drm/ttm > drivers/gpu/drm/udl > drivers/gpu/drm/vmwgfx > david@david-mb ~/dev/kernel/linux $ > > So for x86 gma500,nouveau,qxl,udl,vmwgfx don't set DRIVER_USE_MTRR. > But I cannot tell whether they break if we call arch_phys_wc_add/del, > anyway. At least nouveau seemed to work here, but it doesn't use AGP > or drm_bufs, I guess. Cool, thanks a lot for stitching together the list of drivers to look at. So for real KMS drivers it's the drives responsibility to add an mtrr if it needs one. nouvea, radeon, mgag200, i915 and vmwgfx do that already. Somehow the savage driver also ends up doing that, I have no idea why. Note that gma500 as a pure KMS driver doesn't need MTRR setup since the platforms that it supports all support PAT. So no MTRRs needed to get wc iomappings. The mtrr support in the drm core is all for legacy mappings of garts, framebuffers and registers. All legacy drivers set the USE_MTRR flag, so we're good there. All in all I think we can really just ditch this /endquote v2: Also kill DRIVER_USE_MTRR as suggested by David Herrmann v3: Rebase on top of David Herrmann's agp setup/cleanup changes. Cc: David Herrmann <dh.herrmann@gmail.com> Cc: Andy Lutomirski <luto@amacapital.net> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Acked-by: Andy Lutomirski <luto@amacapital.net> Reviewed-by: David Herrmann <dh.herrmann@gmail.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
1471 lines
39 KiB
C
1471 lines
39 KiB
C
/**
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* \file drm_bufs.c
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* Generic buffer template
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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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/*
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* Created: Thu Nov 23 03:10:50 2000 by gareth@valinux.com
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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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* 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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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 (!drm_core_has_AGP(dev)) {
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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_GEM:
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DRM_ERROR("tried to addmap GEM object\n");
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break;
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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_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_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_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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* 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_addmap
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*/
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int drm_rmmap_locked(struct drm_device *dev, struct drm_local_map *map)
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{
|
|
struct drm_map_list *r_list = NULL, *list_t;
|
|
drm_dma_handle_t dmah;
|
|
int found = 0;
|
|
struct drm_master *master;
|
|
|
|
/* Find the list entry for the map and remove it */
|
|
list_for_each_entry_safe(r_list, list_t, &dev->maplist, head) {
|
|
if (r_list->map == map) {
|
|
master = r_list->master;
|
|
list_del(&r_list->head);
|
|
drm_ht_remove_key(&dev->map_hash,
|
|
r_list->user_token >> PAGE_SHIFT);
|
|
kfree(r_list);
|
|
found = 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!found)
|
|
return -EINVAL;
|
|
|
|
switch (map->type) {
|
|
case _DRM_REGISTERS:
|
|
iounmap(map->handle);
|
|
/* FALLTHROUGH */
|
|
case _DRM_FRAME_BUFFER:
|
|
arch_phys_wc_del(map->mtrr);
|
|
break;
|
|
case _DRM_SHM:
|
|
vfree(map->handle);
|
|
if (master) {
|
|
if (dev->sigdata.lock == master->lock.hw_lock)
|
|
dev->sigdata.lock = NULL;
|
|
master->lock.hw_lock = NULL; /* SHM removed */
|
|
master->lock.file_priv = NULL;
|
|
wake_up_interruptible_all(&master->lock.lock_queue);
|
|
}
|
|
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;
|
|
case _DRM_GEM:
|
|
DRM_ERROR("tried to rmmap GEM object\n");
|
|
break;
|
|
}
|
|
kfree(map);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(drm_rmmap_locked);
|
|
|
|
int drm_rmmap(struct drm_device *dev, struct drm_local_map *map)
|
|
{
|
|
int ret;
|
|
|
|
mutex_lock(&dev->struct_mutex);
|
|
ret = drm_rmmap_locked(dev, map);
|
|
mutex_unlock(&dev->struct_mutex);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(drm_rmmap);
|
|
|
|
/* The rmmap ioctl appears to be unnecessary. All mappings are torn down on
|
|
* the last close of the device, and this is necessary for cleanup when things
|
|
* exit uncleanly. Therefore, having userland manually remove mappings seems
|
|
* like a pointless exercise since they're going away anyway.
|
|
*
|
|
* One use case might be after addmap is allowed for normal users for SHM and
|
|
* gets used by drivers that the server doesn't need to care about. This seems
|
|
* unlikely.
|
|
*
|
|
* \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_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_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 __OS_HAS_AGP
|
|
/**
|
|
* Add AGP buffers for DMA transfers.
|
|
*
|
|
* \param dev struct drm_device to which the buffers are to be added.
|
|
* \param request pointer to a struct drm_buf_desc describing the request.
|
|
* \return zero on success or a negative number on failure.
|
|
*
|
|
* After some sanity checks creates a drm_buf structure for each buffer and
|
|
* reallocates the buffer list of the same size order to accommodate the new
|
|
* buffers.
|
|
*/
|
|
int drm_addbufs_agp(struct drm_device * dev, struct drm_buf_desc * request)
|
|
{
|
|
struct drm_device_dma *dma = dev->dma;
|
|
struct drm_buf_entry *entry;
|
|
struct drm_agp_mem *agp_entry;
|
|
struct drm_buf *buf;
|
|
unsigned long offset;
|
|
unsigned long agp_offset;
|
|
int count;
|
|
int order;
|
|
int size;
|
|
int alignment;
|
|
int page_order;
|
|
int total;
|
|
int byte_count;
|
|
int i, valid;
|
|
struct drm_buf **temp_buflist;
|
|
|
|
if (!dma)
|
|
return -EINVAL;
|
|
|
|
count = request->count;
|
|
order = 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->count_lock);
|
|
if (dev->buf_use) {
|
|
spin_unlock(&dev->count_lock);
|
|
return -EBUSY;
|
|
}
|
|
atomic_inc(&dev->buf_alloc);
|
|
spin_unlock(&dev->count_lock);
|
|
|
|
mutex_lock(&dev->struct_mutex);
|
|
entry = &dma->bufs[order];
|
|
if (entry->buf_count) {
|
|
mutex_unlock(&dev->struct_mutex);
|
|
atomic_dec(&dev->buf_alloc);
|
|
return -ENOMEM; /* May only call once for each order */
|
|
}
|
|
|
|
if (count < 0 || count > 4096) {
|
|
mutex_unlock(&dev->struct_mutex);
|
|
atomic_dec(&dev->buf_alloc);
|
|
return -EINVAL;
|
|
}
|
|
|
|
entry->buflist = 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_addbufs_agp);
|
|
#endif /* __OS_HAS_AGP */
|
|
|
|
int drm_addbufs_pci(struct drm_device * dev, struct drm_buf_desc * request)
|
|
{
|
|
struct drm_device_dma *dma = dev->dma;
|
|
int count;
|
|
int order;
|
|
int size;
|
|
int total;
|
|
int page_order;
|
|
struct drm_buf_entry *entry;
|
|
drm_dma_handle_t *dmah;
|
|
struct drm_buf *buf;
|
|
int alignment;
|
|
unsigned long offset;
|
|
int i;
|
|
int byte_count;
|
|
int page_count;
|
|
unsigned long *temp_pagelist;
|
|
struct drm_buf **temp_buflist;
|
|
|
|
if (!drm_core_check_feature(dev, DRIVER_PCI_DMA))
|
|
return -EINVAL;
|
|
|
|
if (!dma)
|
|
return -EINVAL;
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
|
|
count = request->count;
|
|
order = 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->count_lock);
|
|
if (dev->buf_use) {
|
|
spin_unlock(&dev->count_lock);
|
|
return -EBUSY;
|
|
}
|
|
atomic_inc(&dev->buf_alloc);
|
|
spin_unlock(&dev->count_lock);
|
|
|
|
mutex_lock(&dev->struct_mutex);
|
|
entry = &dma->bufs[order];
|
|
if (entry->buf_count) {
|
|
mutex_unlock(&dev->struct_mutex);
|
|
atomic_dec(&dev->buf_alloc);
|
|
return -ENOMEM; /* May only call once for each order */
|
|
}
|
|
|
|
if (count < 0 || count > 4096) {
|
|
mutex_unlock(&dev->struct_mutex);
|
|
atomic_dec(&dev->buf_alloc);
|
|
return -EINVAL;
|
|
}
|
|
|
|
entry->buflist = 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_addbufs_pci);
|
|
|
|
static int drm_addbufs_sg(struct drm_device * dev, struct drm_buf_desc * request)
|
|
{
|
|
struct drm_device_dma *dma = dev->dma;
|
|
struct drm_buf_entry *entry;
|
|
struct drm_buf *buf;
|
|
unsigned long offset;
|
|
unsigned long agp_offset;
|
|
int count;
|
|
int order;
|
|
int size;
|
|
int alignment;
|
|
int page_order;
|
|
int total;
|
|
int byte_count;
|
|
int i;
|
|
struct drm_buf **temp_buflist;
|
|
|
|
if (!drm_core_check_feature(dev, DRIVER_SG))
|
|
return -EINVAL;
|
|
|
|
if (!dma)
|
|
return -EINVAL;
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
|
|
count = request->count;
|
|
order = 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->count_lock);
|
|
if (dev->buf_use) {
|
|
spin_unlock(&dev->count_lock);
|
|
return -EBUSY;
|
|
}
|
|
atomic_inc(&dev->buf_alloc);
|
|
spin_unlock(&dev->count_lock);
|
|
|
|
mutex_lock(&dev->struct_mutex);
|
|
entry = &dma->bufs[order];
|
|
if (entry->buf_count) {
|
|
mutex_unlock(&dev->struct_mutex);
|
|
atomic_dec(&dev->buf_alloc);
|
|
return -ENOMEM; /* May only call once for each order */
|
|
}
|
|
|
|
if (count < 0 || count > 4096) {
|
|
mutex_unlock(&dev->struct_mutex);
|
|
atomic_dec(&dev->buf_alloc);
|
|
return -EINVAL;
|
|
}
|
|
|
|
entry->buflist = 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_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 __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 = -EINVAL;
|
|
else
|
|
ret = drm_addbufs_pci(dev, request);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* Get information about the buffer mappings.
|
|
*
|
|
* This was originally mean for debugging purposes, or by a sophisticated
|
|
* client library to determine how best to use the available buffers (e.g.,
|
|
* large buffers can be used for image transfer).
|
|
*
|
|
* \param inode device inode.
|
|
* \param file_priv DRM file private.
|
|
* \param cmd command.
|
|
* \param arg pointer to a drm_buf_info structure.
|
|
* \return zero on success or a negative number on failure.
|
|
*
|
|
* Increments drm_device::buf_use while holding the drm_device::count_lock
|
|
* lock, preventing of allocating more buffers after this call. Information
|
|
* about each requested buffer is then copied into user space.
|
|
*/
|
|
int drm_infobufs(struct drm_device *dev, void *data,
|
|
struct drm_file *file_priv)
|
|
{
|
|
struct drm_device_dma *dma = dev->dma;
|
|
struct drm_buf_info *request = data;
|
|
int i;
|
|
int count;
|
|
|
|
if (drm_core_check_feature(dev, DRIVER_MODESET))
|
|
return -EINVAL;
|
|
|
|
if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA))
|
|
return -EINVAL;
|
|
|
|
if (!dma)
|
|
return -EINVAL;
|
|
|
|
spin_lock(&dev->count_lock);
|
|
if (atomic_read(&dev->buf_alloc)) {
|
|
spin_unlock(&dev->count_lock);
|
|
return -EBUSY;
|
|
}
|
|
++dev->buf_use; /* Can't allocate more after this call */
|
|
spin_unlock(&dev->count_lock);
|
|
|
|
for (i = 0, count = 0; i < DRM_MAX_ORDER + 1; i++) {
|
|
if (dma->bufs[i].buf_count)
|
|
++count;
|
|
}
|
|
|
|
DRM_DEBUG("count = %d\n", count);
|
|
|
|
if (request->count >= count) {
|
|
for (i = 0, count = 0; i < DRM_MAX_ORDER + 1; i++) {
|
|
if (dma->bufs[i].buf_count) {
|
|
struct drm_buf_desc __user *to =
|
|
&request->list[count];
|
|
struct drm_buf_entry *from = &dma->bufs[i];
|
|
struct drm_freelist *list = &dma->bufs[i].freelist;
|
|
if (copy_to_user(&to->count,
|
|
&from->buf_count,
|
|
sizeof(from->buf_count)) ||
|
|
copy_to_user(&to->size,
|
|
&from->buf_size,
|
|
sizeof(from->buf_size)) ||
|
|
copy_to_user(&to->low_mark,
|
|
&list->low_mark,
|
|
sizeof(list->low_mark)) ||
|
|
copy_to_user(&to->high_mark,
|
|
&list->high_mark,
|
|
sizeof(list->high_mark)))
|
|
return -EFAULT;
|
|
|
|
DRM_DEBUG("%d %d %d %d %d\n",
|
|
i,
|
|
dma->bufs[i].buf_count,
|
|
dma->bufs[i].buf_size,
|
|
dma->bufs[i].freelist.low_mark,
|
|
dma->bufs[i].freelist.high_mark);
|
|
++count;
|
|
}
|
|
}
|
|
}
|
|
request->count = count;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Specifies a low and high water mark for buffer allocation
|
|
*
|
|
* \param inode device inode.
|
|
* \param file_priv DRM file private.
|
|
* \param cmd command.
|
|
* \param arg a pointer to a drm_buf_desc structure.
|
|
* \return zero on success or a negative number on failure.
|
|
*
|
|
* Verifies that the size order is bounded between the admissible orders and
|
|
* updates the respective drm_device_dma::bufs entry low and high water mark.
|
|
*
|
|
* \note This ioctl is deprecated and mostly never used.
|
|
*/
|
|
int drm_markbufs(struct drm_device *dev, void *data,
|
|
struct drm_file *file_priv)
|
|
{
|
|
struct drm_device_dma *dma = dev->dma;
|
|
struct drm_buf_desc *request = data;
|
|
int order;
|
|
struct drm_buf_entry *entry;
|
|
|
|
if (drm_core_check_feature(dev, DRIVER_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->freelist.low_mark = request->low_mark;
|
|
entry->freelist.high_mark = request->high_mark;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Unreserve the buffers in list, previously reserved using drmDMA.
|
|
*
|
|
* \param inode device inode.
|
|
* \param file_priv DRM file private.
|
|
* \param cmd command.
|
|
* \param arg pointer to a drm_buf_free structure.
|
|
* \return zero on success or a negative number on failure.
|
|
*
|
|
* Calls free_buffer() for each used buffer.
|
|
* This function is primarily used for debugging.
|
|
*/
|
|
int drm_freebufs(struct drm_device *dev, void *data,
|
|
struct drm_file *file_priv)
|
|
{
|
|
struct drm_device_dma *dma = dev->dma;
|
|
struct drm_buf_free *request = data;
|
|
int i;
|
|
int idx;
|
|
struct drm_buf *buf;
|
|
|
|
if (drm_core_check_feature(dev, DRIVER_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_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_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->count_lock);
|
|
if (atomic_read(&dev->buf_alloc)) {
|
|
spin_unlock(&dev->count_lock);
|
|
return -EBUSY;
|
|
}
|
|
dev->buf_use++; /* Can't allocate more after this call */
|
|
spin_unlock(&dev->count_lock);
|
|
|
|
if (request->count >= dma->buf_count) {
|
|
if ((drm_core_has_AGP(dev) && (dma->flags & _DRM_DMA_USE_AGP))
|
|
|| (drm_core_check_feature(dev, DRIVER_SG)
|
|
&& (dma->flags & _DRM_DMA_USE_SG))) {
|
|
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;
|
|
}
|
|
|
|
struct drm_local_map *drm_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_getsarea);
|