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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
commit | ace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch) | |
tree | b2d64bc10158fdd5497876388cd68142ca374ed3 /drivers/gpu/drm/vmwgfx/vmwgfx_ttm_glue.c | |
parent | Initial commit. (diff) | |
download | linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip |
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/gpu/drm/vmwgfx/vmwgfx_ttm_glue.c')
-rw-r--r-- | drivers/gpu/drm/vmwgfx/vmwgfx_ttm_glue.c | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_ttm_glue.c b/drivers/gpu/drm/vmwgfx/vmwgfx_ttm_glue.c new file mode 100644 index 0000000000..90097d04b4 --- /dev/null +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_ttm_glue.c @@ -0,0 +1,110 @@ +// 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" + +static int vmw_bo_vm_lookup(struct ttm_device *bdev, + struct drm_file *filp, + unsigned long offset, + unsigned long pages, + struct ttm_buffer_object **p_bo) +{ + struct vmw_private *dev_priv = container_of(bdev, struct vmw_private, bdev); + struct drm_device *drm = &dev_priv->drm; + struct drm_vma_offset_node *node; + int ret; + + *p_bo = NULL; + + drm_vma_offset_lock_lookup(bdev->vma_manager); + + node = drm_vma_offset_lookup_locked(bdev->vma_manager, offset, pages); + if (likely(node)) { + *p_bo = container_of(node, struct ttm_buffer_object, + base.vma_node); + *p_bo = ttm_bo_get_unless_zero(*p_bo); + } + + drm_vma_offset_unlock_lookup(bdev->vma_manager); + + if (!*p_bo) { + drm_err(drm, "Could not find buffer object to map\n"); + return -EINVAL; + } + + if (!drm_vma_node_is_allowed(node, filp)) { + ret = -EACCES; + goto out_no_access; + } + + return 0; +out_no_access: + ttm_bo_put(*p_bo); + return ret; +} + +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); + struct ttm_device *bdev = &dev_priv->bdev; + struct ttm_buffer_object *bo; + int ret; + + if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET_START)) + return -EINVAL; + + ret = vmw_bo_vm_lookup(bdev, file_priv, vma->vm_pgoff, vma_pages(vma), &bo); + if (unlikely(ret != 0)) + return ret; + + ret = ttm_bo_mmap_obj(vma, bo); + if (unlikely(ret != 0)) + goto out_unref; + + vma->vm_ops = &vmw_vm_ops; + + /* Use VM_PFNMAP rather than VM_MIXEDMAP if not a COW mapping */ + if (!is_cow_mapping(vma->vm_flags)) + vm_flags_mod(vma, VM_PFNMAP, VM_MIXEDMAP); + + ttm_bo_put(bo); /* release extra ref taken by ttm_bo_mmap_obj() */ + + return 0; + +out_unref: + ttm_bo_put(bo); + return ret; +} + |