129 lines
3.8 KiB
C
129 lines
3.8 KiB
C
/*
|
|
* Copyright 2014 Advanced Micro Devices, Inc.
|
|
* All Rights Reserved.
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a
|
|
* copy of this software and associated documentation files (the
|
|
* "Software"), to deal in the Software without restriction, including
|
|
* without limitation the rights to use, copy, modify, merge, publish,
|
|
* distribute, sub license, and/or sell copies of the Software, and to
|
|
* permit persons to whom the Software is furnished to do so, subject to
|
|
* the following conditions:
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
|
|
* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
|
|
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
|
|
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
|
|
* USE OR OTHER DEALINGS IN THE SOFTWARE.
|
|
*
|
|
* The above copyright notice and this permission notice (including the
|
|
* next paragraph) shall be included in all copies or substantial portions
|
|
* of the Software.
|
|
*
|
|
*/
|
|
/*
|
|
* Authors:
|
|
* Christian König <christian.koenig@amd.com>
|
|
*/
|
|
|
|
#include <linux/firmware.h>
|
|
#include <linux/module.h>
|
|
#include <linux/mmu_notifier.h>
|
|
|
|
#include <drm/drm.h>
|
|
|
|
#include "radeon.h"
|
|
|
|
/**
|
|
* radeon_mn_invalidate - callback to notify about mm change
|
|
*
|
|
* @mn: our notifier
|
|
* @range: the VMA under invalidation
|
|
* @cur_seq: Value to pass to mmu_interval_set_seq()
|
|
*
|
|
* We block for all BOs between start and end to be idle and
|
|
* unmap them by move them into system domain again.
|
|
*/
|
|
static bool radeon_mn_invalidate(struct mmu_interval_notifier *mn,
|
|
const struct mmu_notifier_range *range,
|
|
unsigned long cur_seq)
|
|
{
|
|
struct radeon_bo *bo = container_of(mn, struct radeon_bo, notifier);
|
|
struct ttm_operation_ctx ctx = { false, false };
|
|
long r;
|
|
|
|
if (!bo->tbo.ttm || !radeon_ttm_tt_is_bound(bo->tbo.bdev, bo->tbo.ttm))
|
|
return true;
|
|
|
|
if (!mmu_notifier_range_blockable(range))
|
|
return false;
|
|
|
|
r = radeon_bo_reserve(bo, true);
|
|
if (r) {
|
|
DRM_ERROR("(%ld) failed to reserve user bo\n", r);
|
|
return true;
|
|
}
|
|
|
|
r = dma_resv_wait_timeout(bo->tbo.base.resv, DMA_RESV_USAGE_BOOKKEEP,
|
|
false, MAX_SCHEDULE_TIMEOUT);
|
|
if (r <= 0)
|
|
DRM_ERROR("(%ld) failed to wait for user bo\n", r);
|
|
|
|
radeon_ttm_placement_from_domain(bo, RADEON_GEM_DOMAIN_CPU);
|
|
r = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx);
|
|
if (r)
|
|
DRM_ERROR("(%ld) failed to validate user bo\n", r);
|
|
|
|
radeon_bo_unreserve(bo);
|
|
return true;
|
|
}
|
|
|
|
static const struct mmu_interval_notifier_ops radeon_mn_ops = {
|
|
.invalidate = radeon_mn_invalidate,
|
|
};
|
|
|
|
/**
|
|
* radeon_mn_register - register a BO for notifier updates
|
|
*
|
|
* @bo: radeon buffer object
|
|
* @addr: userptr addr we should monitor
|
|
*
|
|
* Registers an MMU notifier for the given BO at the specified address.
|
|
* Returns 0 on success, -ERRNO if anything goes wrong.
|
|
*/
|
|
int radeon_mn_register(struct radeon_bo *bo, unsigned long addr)
|
|
{
|
|
int ret;
|
|
|
|
ret = mmu_interval_notifier_insert(&bo->notifier, current->mm, addr,
|
|
radeon_bo_size(bo), &radeon_mn_ops);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/*
|
|
* FIXME: radeon appears to allow get_user_pages to run during
|
|
* invalidate_range_start/end, which is not a safe way to read the
|
|
* PTEs. It should use the mmu_interval_read_begin() scheme around the
|
|
* get_user_pages to ensure that the PTEs are read properly
|
|
*/
|
|
mmu_interval_read_begin(&bo->notifier);
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* radeon_mn_unregister - unregister a BO for notifier updates
|
|
*
|
|
* @bo: radeon buffer object
|
|
*
|
|
* Remove any registration of MMU notifier updates from the buffer object.
|
|
*/
|
|
void radeon_mn_unregister(struct radeon_bo *bo)
|
|
{
|
|
if (!bo->notifier.mm)
|
|
return;
|
|
mmu_interval_notifier_remove(&bo->notifier);
|
|
bo->notifier.mm = NULL;
|
|
}
|