drivers/gpu/drm/vmwgfx/vmwgfx_ttm_glue.c

   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
  30 int 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 */
  59 static 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 */
  69 static 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  */
  85 void 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 }