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b204142520
For shared, and read-only private mappings of graphics memory, use VM_PFNMAP instead of VM_MIXEDMAP. This means less accounting overhead when inserting and removing page-table entries. TTM doesn't do this by default, since there was a performance problem with book-keeping of write-combined mappings. Since vmwgfx solely uses cached mappings, that's not a problem and now that the TTM vm has largely been turned into helpers, we can use VM_PFNMAP on a per-driver basis Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Reviewed-by: Roland Scheidegger <sroland@vmware.com>
90 lines
3.3 KiB
C
90 lines
3.3 KiB
C
// SPDX-License-Identifier: GPL-2.0 OR MIT
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/**************************************************************************
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*
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* Copyright 2009-2011 VMware, Inc., Palo Alto, CA., USA
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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* USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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#include "vmwgfx_drv.h"
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int vmw_mmap(struct file *filp, struct vm_area_struct *vma)
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{
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static const struct vm_operations_struct vmw_vm_ops = {
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.pfn_mkwrite = vmw_bo_vm_mkwrite,
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.page_mkwrite = vmw_bo_vm_mkwrite,
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.fault = vmw_bo_vm_fault,
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.open = ttm_bo_vm_open,
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.close = ttm_bo_vm_close
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};
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struct drm_file *file_priv = filp->private_data;
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struct vmw_private *dev_priv = vmw_priv(file_priv->minor->dev);
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int ret = ttm_bo_mmap(filp, vma, &dev_priv->bdev);
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if (ret)
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return ret;
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vma->vm_ops = &vmw_vm_ops;
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/* Use VM_PFNMAP rather than VM_MIXEDMAP if not a COW mapping */
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if ((vma->vm_flags & (VM_SHARED | VM_MAYWRITE)) != VM_MAYWRITE)
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vma->vm_flags = (vma->vm_flags & ~VM_MIXEDMAP) | VM_PFNMAP;
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return 0;
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}
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/* struct vmw_validation_mem callback */
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static int vmw_vmt_reserve(struct vmw_validation_mem *m, size_t size)
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{
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static struct ttm_operation_ctx ctx = {.interruptible = false,
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.no_wait_gpu = false};
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struct vmw_private *dev_priv = container_of(m, struct vmw_private, vvm);
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return ttm_mem_global_alloc(vmw_mem_glob(dev_priv), size, &ctx);
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}
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/* struct vmw_validation_mem callback */
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static void vmw_vmt_unreserve(struct vmw_validation_mem *m, size_t size)
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{
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struct vmw_private *dev_priv = container_of(m, struct vmw_private, vvm);
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return ttm_mem_global_free(vmw_mem_glob(dev_priv), size);
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}
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/**
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* vmw_validation_mem_init_ttm - Interface the validation memory tracker
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* to ttm.
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* @dev_priv: Pointer to struct vmw_private. The reason we choose a vmw private
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* rather than a struct vmw_validation_mem is to make sure assumption in the
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* callbacks that struct vmw_private derives from struct vmw_validation_mem
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* holds true.
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* @gran: The recommended allocation granularity
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*/
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void vmw_validation_mem_init_ttm(struct vmw_private *dev_priv, size_t gran)
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{
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struct vmw_validation_mem *vvm = &dev_priv->vvm;
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vvm->reserve_mem = vmw_vmt_reserve;
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vvm->unreserve_mem = vmw_vmt_unreserve;
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vvm->gran = gran;
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}
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