linux/drivers/gpu/drm/vmwgfx/vmwgfx_ttm_glue.c
Thomas Hellstrom b7468b15d2 drm/vmwgfx: Implement an infrastructure for write-coherent resources
This infrastructure will, for coherent resources, make sure that
from the user-space point of view, data written by the CPU is immediately
automatically available to the GPU at resource validation time.

Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@surriel.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Huang Ying <ying.huang@intel.com>
Cc: Jérôme Glisse <jglisse@redhat.com>
Cc: Kirill A. Shutemov <kirill@shutemov.name>
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Deepak Rawat <drawat@vmware.com>
2019-11-06 13:04:54 +01:00

86 lines
3.1 KiB
C

// SPDX-License-Identifier: GPL-2.0 OR MIT
/**************************************************************************
*
* Copyright 2009-2011 VMware, Inc., Palo Alto, CA., USA
*
* 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 above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND 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.
*
**************************************************************************/
#include "vmwgfx_drv.h"
int vmw_mmap(struct file *filp, struct vm_area_struct *vma)
{
static const struct vm_operations_struct vmw_vm_ops = {
.pfn_mkwrite = vmw_bo_vm_mkwrite,
.page_mkwrite = vmw_bo_vm_mkwrite,
.fault = vmw_bo_vm_fault,
.open = ttm_bo_vm_open,
.close = ttm_bo_vm_close
};
struct drm_file *file_priv = filp->private_data;
struct vmw_private *dev_priv = vmw_priv(file_priv->minor->dev);
int ret = ttm_bo_mmap(filp, vma, &dev_priv->bdev);
if (ret)
return ret;
vma->vm_ops = &vmw_vm_ops;
return 0;
}
/* struct vmw_validation_mem callback */
static int vmw_vmt_reserve(struct vmw_validation_mem *m, size_t size)
{
static struct ttm_operation_ctx ctx = {.interruptible = false,
.no_wait_gpu = false};
struct vmw_private *dev_priv = container_of(m, struct vmw_private, vvm);
return ttm_mem_global_alloc(vmw_mem_glob(dev_priv), size, &ctx);
}
/* struct vmw_validation_mem callback */
static void vmw_vmt_unreserve(struct vmw_validation_mem *m, size_t size)
{
struct vmw_private *dev_priv = container_of(m, struct vmw_private, vvm);
return ttm_mem_global_free(vmw_mem_glob(dev_priv), size);
}
/**
* vmw_validation_mem_init_ttm - Interface the validation memory tracker
* to ttm.
* @dev_priv: Pointer to struct vmw_private. The reason we choose a vmw private
* rather than a struct vmw_validation_mem is to make sure assumption in the
* callbacks that struct vmw_private derives from struct vmw_validation_mem
* holds true.
* @gran: The recommended allocation granularity
*/
void vmw_validation_mem_init_ttm(struct vmw_private *dev_priv, size_t gran)
{
struct vmw_validation_mem *vvm = &dev_priv->vvm;
vvm->reserve_mem = vmw_vmt_reserve;
vvm->unreserve_mem = vmw_vmt_unreserve;
vvm->gran = gran;
}