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Diffstat (limited to 'linux-core/drm_vm_nopage_compat.c')
-rw-r--r--linux-core/drm_vm_nopage_compat.c267
1 files changed, 0 insertions, 267 deletions
diff --git a/linux-core/drm_vm_nopage_compat.c b/linux-core/drm_vm_nopage_compat.c
deleted file mode 100644
index be8d6c1c..00000000
--- a/linux-core/drm_vm_nopage_compat.c
+++ /dev/null
@@ -1,267 +0,0 @@
-/**
- * \file drm_vm.c
- * Memory mapping for DRM
- *
- * \author Rickard E. (Rik) Faith <faith@valinux.com>
- * \author Gareth Hughes <gareth@valinux.com>
- */
-
-/*
- * Created: Mon Jan 4 08:58:31 1999 by faith@valinux.com
- *
- * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
- * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
- * All Rights Reserved.
- *
- * 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, sublicense,
- * 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 NONINFRINGEMENT. IN NO EVENT SHALL
- * VA LINUX SYSTEMS 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 "drmP.h"
-
-#ifdef DRM_VM_NOPAGE
-/**
- * \c nopage method for AGP virtual memory.
- *
- * \param vma virtual memory area.
- * \param address access address.
- * \return pointer to the page structure.
- *
- * Find the right map and if it's AGP memory find the real physical page to
- * map, get the page, increment the use count and return it.
- */
-#if __OS_HAS_AGP
-static __inline__ struct page *drm_do_vm_nopage(struct vm_area_struct *vma,
- unsigned long address)
-{
- struct drm_file *priv = vma->vm_file->private_data;
- struct drm_device *dev = priv->minor->dev;
- struct drm_map *map = NULL;
- struct drm_map_list *r_list;
- struct drm_hash_item *hash;
-
- /*
- * Find the right map
- */
- if (!drm_core_has_AGP(dev))
- goto vm_nopage_error;
-
- if (!dev->agp || !dev->agp->cant_use_aperture)
- goto vm_nopage_error;
-
- if (drm_ht_find_item(&dev->map_hash, vma->vm_pgoff, &hash))
- goto vm_nopage_error;
-
- r_list = drm_hash_entry(hash, struct drm_map_list, hash);
- map = r_list->map;
-
- if (map && map->type == _DRM_AGP) {
- unsigned long offset = address - vma->vm_start;
- unsigned long baddr = map->offset + offset;
- struct drm_agp_mem *agpmem;
- struct page *page;
-
-#ifdef __alpha__
- /*
- * Adjust to a bus-relative address
- */
- baddr -= dev->hose->mem_space->start;
-#endif
-
- /*
- * It's AGP memory - find the real physical page to map
- */
- list_for_each_entry(agpmem, &dev->agp->memory, head) {
- if (agpmem->bound <= baddr &&
- agpmem->bound + agpmem->pages * PAGE_SIZE > baddr)
- break;
- }
-
- if (!agpmem)
- goto vm_nopage_error;
-
- /*
- * Get the page, inc the use count, and return it
- */
- offset = (baddr - agpmem->bound) >> PAGE_SHIFT;
- page = virt_to_page(__va(agpmem->memory->memory[offset]));
- get_page(page);
-
-#if 0
- /* page_count() not defined everywhere */
- DRM_DEBUG
- ("baddr = 0x%lx page = 0x%p, offset = 0x%lx, count=%d\n",
- baddr, __va(agpmem->memory->memory[offset]), offset,
- page_count(page));
-#endif
-
- return page;
- }
- vm_nopage_error:
- return NOPAGE_SIGBUS; /* Disallow mremap */
-}
-#else /* __OS_HAS_AGP */
-static __inline__ struct page *drm_do_vm_nopage(struct vm_area_struct *vma,
- unsigned long address)
-{
- return NOPAGE_SIGBUS;
-}
-#endif /* __OS_HAS_AGP */
-
-/**
- * \c nopage method for shared virtual memory.
- *
- * \param vma virtual memory area.
- * \param address access address.
- * \return pointer to the page structure.
- *
- * Get the mapping, find the real physical page to map, get the page, and
- * return it.
- */
-static __inline__ struct page *drm_do_vm_shm_nopage(struct vm_area_struct *vma,
- unsigned long address)
-{
- struct drm_map *map = (struct drm_map *) vma->vm_private_data;
- unsigned long offset;
- unsigned long i;
- struct page *page;
-
- if (address > vma->vm_end)
- return NOPAGE_SIGBUS; /* Disallow mremap */
- if (!map)
- return NOPAGE_SIGBUS; /* Nothing allocated */
-
- offset = address - vma->vm_start;
- i = (unsigned long)map->handle + offset;
- page = vmalloc_to_page((void *)i);
- if (!page)
- return NOPAGE_SIGBUS;
- get_page(page);
-
- DRM_DEBUG("0x%lx\n", address);
- return page;
-}
-
-/**
- * \c nopage method for DMA virtual memory.
- *
- * \param vma virtual memory area.
- * \param address access address.
- * \return pointer to the page structure.
- *
- * Determine the page number from the page offset and get it from drm_device_dma::pagelist.
- */
-static __inline__ struct page *drm_do_vm_dma_nopage(struct vm_area_struct *vma,
- unsigned long address)
-{
- struct drm_file *priv = vma->vm_file->private_data;
- struct drm_device *dev = priv->minor->dev;
- struct drm_device_dma *dma = dev->dma;
- unsigned long offset;
- unsigned long page_nr;
- struct page *page;
-
- if (!dma)
- return NOPAGE_SIGBUS; /* Error */
- if (address > vma->vm_end)
- return NOPAGE_SIGBUS; /* Disallow mremap */
- if (!dma->pagelist)
- return NOPAGE_SIGBUS; /* Nothing allocated */
-
- offset = address - vma->vm_start; /* vm_[pg]off[set] should be 0 */
- page_nr = offset >> PAGE_SHIFT;
- page = virt_to_page((dma->pagelist[page_nr] + (offset & (~PAGE_MASK))));
-
- get_page(page);
-
- DRM_DEBUG("0x%lx (page %lu)\n", address, page_nr);
- return page;
-}
-
-/**
- * \c nopage method for scatter-gather virtual memory.
- *
- * \param vma virtual memory area.
- * \param address access address.
- * \return pointer to the page structure.
- *
- * Determine the map offset from the page offset and get it from drm_sg_mem::pagelist.
- */
-static __inline__ struct page *drm_do_vm_sg_nopage(struct vm_area_struct *vma,
- unsigned long address)
-{
- struct drm_map *map = (struct drm_map *) vma->vm_private_data;
- struct drm_file *priv = vma->vm_file->private_data;
- struct drm_device *dev = priv->minor->dev;
- struct drm_sg_mem *entry = dev->sg;
- unsigned long offset;
- unsigned long map_offset;
- unsigned long page_offset;
- struct page *page;
-
- DRM_DEBUG("\n");
- if (!entry)
- return NOPAGE_SIGBUS; /* Error */
- if (address > vma->vm_end)
- return NOPAGE_SIGBUS; /* Disallow mremap */
- if (!entry->pagelist)
- return NOPAGE_SIGBUS; /* Nothing allocated */
-
- offset = address - vma->vm_start;
- map_offset = map->offset - (unsigned long)dev->sg->virtual;
- page_offset = (offset >> PAGE_SHIFT) + (map_offset >> PAGE_SHIFT);
- page = entry->pagelist[page_offset];
- get_page(page);
-
- return page;
-}
-
-
-struct page *drm_vm_nopage(struct vm_area_struct *vma,
- unsigned long address, int *type)
-{
- if (type)
- *type = VM_FAULT_MINOR;
- return drm_do_vm_nopage(vma, address);
-}
-
-struct page *drm_vm_shm_nopage(struct vm_area_struct *vma,
- unsigned long address, int *type)
-{
- if (type)
- *type = VM_FAULT_MINOR;
- return drm_do_vm_shm_nopage(vma, address);
-}
-
-struct page *drm_vm_dma_nopage(struct vm_area_struct *vma,
- unsigned long address, int *type)
-{
- if (type)
- *type = VM_FAULT_MINOR;
- return drm_do_vm_dma_nopage(vma, address);
-}
-
-struct page *drm_vm_sg_nopage(struct vm_area_struct *vma,
- unsigned long address, int *type)
-{
- if (type)
- *type = VM_FAULT_MINOR;
- return drm_do_vm_sg_nopage(vma, address);
-}
-#endif
generated by cgit v1.2.3 (git 2.39.1) at 2024-04-20 01:37:18 +0000