LXR linux/drivers/gpu/drm/vmwgfx/vmwgfx_ttm

   1// SPDX-License-Identifier: GPL-2.0 OR MIT
   2/**************************************************************************
   3 *
   4 * Copyright 2009-2011 VMware, Inc., Palo Alto, CA., USA
   5 *
   6 * Permission is hereby granted, free of charge, to any person obtaining a
   7 * copy of this software and associated documentation files (the
   8 * "Software"), to deal in the Software without restriction, including
   9 * without limitation the rights to use, copy, modify, merge, publish,
  10 * distribute, sub license, and/or sell copies of the Software, and to
  11 * permit persons to whom the Software is furnished to do so, subject to
  12 * the following conditions:
  13 *
  14 * The above copyright notice and this permission notice (including the
  15 * next paragraph) shall be included in all copies or substantial portions
  16 * of the Software.
  17 *
  18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  21 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
  22 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  23 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  24 * USE OR OTHER DEALINGS IN THE SOFTWARE.
  25 *
  26 **************************************************************************/
  27
  28#include "vmwgfx_drv.h"
  29
  30int vmw_mmap(struct file *filp, struct vm_area_struct *vma)
  31{
  32        static const struct vm_operations_struct vmw_vm_ops = {
  33                .pfn_mkwrite = vmw_bo_vm_mkwrite,
  34                .page_mkwrite = vmw_bo_vm_mkwrite,
  35                .fault = vmw_bo_vm_fault,
  36                .open = ttm_bo_vm_open,
  37                .close = ttm_bo_vm_close,
  38#ifdef CONFIG_TRANSPARENT_HUGEPAGE
  39                .huge_fault = vmw_bo_vm_huge_fault,
  40#endif
  41        };
  42        struct drm_file *file_priv = filp->private_data;
  43        struct vmw_private *dev_priv = vmw_priv(file_priv->minor->dev);
  44        int ret = ttm_bo_mmap(filp, vma, &dev_priv->bdev);
  45
  46        if (ret)
  47                return ret;
  48
  49        vma->vm_ops = &vmw_vm_ops;
  50
  51        /* Use VM_PFNMAP rather than VM_MIXEDMAP if not a COW mapping */
  52        if ((vma->vm_flags & (VM_SHARED | VM_MAYWRITE)) != VM_MAYWRITE)
  53                vma->vm_flags = (vma->vm_flags & ~VM_MIXEDMAP) | VM_PFNMAP;
  54
  55        return 0;
  56}
  57
  58/* struct vmw_validation_mem callback */
  59static int vmw_vmt_reserve(struct vmw_validation_mem *m, size_t size)
  60{
  61        static struct ttm_operation_ctx ctx = {.interruptible = false,
  62                                               .no_wait_gpu = false};
  63        struct vmw_private *dev_priv = container_of(m, struct vmw_private, vvm);
  64
  65        return ttm_mem_global_alloc(vmw_mem_glob(dev_priv), size, &ctx);
  66}
  67
  68/* struct vmw_validation_mem callback */
  69static void vmw_vmt_unreserve(struct vmw_validation_mem *m, size_t size)
  70{
  71        struct vmw_private *dev_priv = container_of(m, struct vmw_private, vvm);
  72
  73        return ttm_mem_global_free(vmw_mem_glob(dev_priv), size);
  74}
  75
  76/**
  77 * vmw_validation_mem_init_ttm - Interface the validation memory tracker
  78 * to ttm.
  79 * @dev_priv: Pointer to struct vmw_private. The reason we choose a vmw private
  80 * rather than a struct vmw_validation_mem is to make sure assumption in the
  81 * callbacks that struct vmw_private derives from struct vmw_validation_mem
  82 * holds true.
  83 * @gran: The recommended allocation granularity
  84 */
  85void vmw_validation_mem_init_ttm(struct vmw_private *dev_priv, size_t gran)
  86{
  87        struct vmw_validation_mem *vvm = &dev_priv->vvm;
  88
  89        vvm->reserve_mem = vmw_vmt_reserve;
  90        vvm->unreserve_mem = vmw_vmt_unreserve;
  91        vvm->gran = gran;
  92}
  93