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-rw-r--r--linux/drm_vm.h670
1 files changed, 0 insertions, 670 deletions
diff --git a/linux/drm_vm.h b/linux/drm_vm.h
deleted file mode 100644
index 30b0e73e..00000000
--- a/linux/drm_vm.h
+++ /dev/null
@@ -1,670 +0,0 @@
-/**
- * \file drm_vm.h
- * 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"
-
-
-/**
- * \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)
-{
- drm_file_t *priv = vma->vm_file->private_data;
- drm_device_t *dev = priv->dev;
- drm_map_t *map = NULL;
- drm_map_list_t *r_list;
- struct list_head *list;
-
- /*
- * 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;
-
- list_for_each(list, &dev->maplist->head) {
- r_list = list_entry(list, drm_map_list_t, head);
- map = r_list->map;
- if (!map) continue;
- if (map->offset == VM_OFFSET(vma)) break;
- }
-
- if (map && map->type == _DRM_AGP) {
- unsigned long offset = address - vma->vm_start;
- unsigned long baddr = VM_OFFSET(vma) + 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
- */
- for(agpmem = dev->agp->memory; agpmem; agpmem = agpmem->next) {
- 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 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)
-{
- drm_map_t *map = (drm_map_t *)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_OOM; /* Nothing allocated */
-
- offset = address - vma->vm_start;
- i = (unsigned long)map->handle + offset;
- page = vmalloc_to_page((void *)i);
- if (!page)
- return NOPAGE_OOM;
- get_page(page);
-
- DRM_DEBUG("shm_nopage 0x%lx\n", address);
- return page;
-}
-
-
-/**
- * \c close method for shared virtual memory.
- *
- * \param vma virtual memory area.
- *
- * Deletes map information if we are the last
- * person to close a mapping and it's not in the global maplist.
- */
-void DRM(vm_shm_close)(struct vm_area_struct *vma)
-{
- drm_file_t *priv = vma->vm_file->private_data;
- drm_device_t *dev = priv->dev;
- drm_vma_entry_t *pt, *prev, *next;
- drm_map_t *map;
- drm_map_list_t *r_list;
- struct list_head *list;
- int found_maps = 0;
-
- DRM_DEBUG("0x%08lx,0x%08lx\n",
- vma->vm_start, vma->vm_end - vma->vm_start);
- atomic_dec(&dev->vma_count);
-
- map = vma->vm_private_data;
-
- down(&dev->struct_sem);
- for (pt = dev->vmalist, prev = NULL; pt; pt = next) {
- next = pt->next;
- if (pt->vma->vm_private_data == map) found_maps++;
- if (pt->vma == vma) {
- if (prev) {
- prev->next = pt->next;
- } else {
- dev->vmalist = pt->next;
- }
- DRM(free)(pt, sizeof(*pt), DRM_MEM_VMAS);
- } else {
- prev = pt;
- }
- }
- /* We were the only map that was found */
- if(found_maps == 1 &&
- map->flags & _DRM_REMOVABLE) {
- /* Check to see if we are in the maplist, if we are not, then
- * we delete this mappings information.
- */
- found_maps = 0;
- list = &dev->maplist->head;
- list_for_each(list, &dev->maplist->head) {
- r_list = list_entry(list, drm_map_list_t, head);
- if (r_list->map == map) found_maps++;
- }
-
- if(!found_maps) {
- switch (map->type) {
- case _DRM_REGISTERS:
- case _DRM_FRAME_BUFFER:
- if (drm_core_has_MTRR(dev) && map->mtrr >= 0) {
- int retcode;
- retcode = mtrr_del(map->mtrr,
- map->offset,
- map->size);
- DRM_DEBUG("mtrr_del = %d\n", retcode);
- }
- DRM(ioremapfree)(map->handle, map->size, dev);
- break;
- case _DRM_SHM:
- vfree(map->handle);
- break;
- case _DRM_AGP:
- case _DRM_SCATTER_GATHER:
- break;
- }
- DRM(free)(map, sizeof(*map), DRM_MEM_MAPS);
- }
- }
- up(&dev->struct_sem);
-}
-
-/**
- * \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)
-{
- drm_file_t *priv = vma->vm_file->private_data;
- drm_device_t *dev = priv->dev;
- drm_device_dma_t *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_OOM ; /* 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("dma_nopage 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)
-{
- drm_map_t *map = (drm_map_t *)vma->vm_private_data;
- drm_file_t *priv = vma->vm_file->private_data;
- drm_device_t *dev = priv->dev;
- drm_sg_mem_t *entry = dev->sg;
- unsigned long offset;
- unsigned long map_offset;
- unsigned long page_offset;
- struct page *page;
-
- if (!entry) return NOPAGE_SIGBUS; /* Error */
- if (address > vma->vm_end) return NOPAGE_SIGBUS; /* Disallow mremap */
- if (!entry->pagelist) return NOPAGE_OOM ; /* Nothing allocated */
-
-
- offset = address - vma->vm_start;
- map_offset = map->offset - dev->sg->handle;
- page_offset = (offset >> PAGE_SHIFT) + (map_offset >> PAGE_SHIFT);
- page = entry->pagelist[page_offset];
- get_page(page);
-
- return page;
-}
-
-
-#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,0)
-
-static 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);
-}
-
-static 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);
-}
-
-static 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);
-}
-
-static 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);
-}
-
-#else /* LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,0) */
-
-static struct page *DRM(vm_nopage)(struct vm_area_struct *vma,
- unsigned long address,
- int unused) {
- return DRM(do_vm_nopage)(vma, address);
-}
-
-static struct page *DRM(vm_shm_nopage)(struct vm_area_struct *vma,
- unsigned long address,
- int unused) {
- return DRM(do_vm_shm_nopage)(vma, address);
-}
-
-static struct page *DRM(vm_dma_nopage)(struct vm_area_struct *vma,
- unsigned long address,
- int unused) {
- return DRM(do_vm_dma_nopage)(vma, address);
-}
-
-static struct page *DRM(vm_sg_nopage)(struct vm_area_struct *vma,
- unsigned long address,
- int unused) {
- return DRM(do_vm_sg_nopage)(vma, address);
-}
-
-#endif
-
-
-/** AGP virtual memory operations */
-static struct vm_operations_struct DRM(vm_ops) = {
- .nopage = DRM(vm_nopage),
- .open = DRM(vm_open),
- .close = DRM(vm_close),
-};
-
-/** Shared virtual memory operations */
-static struct vm_operations_struct DRM(vm_shm_ops) = {
- .nopage = DRM(vm_shm_nopage),
- .open = DRM(vm_open),
- .close = DRM(vm_shm_close),
-};
-
-/** DMA virtual memory operations */
-static struct vm_operations_struct DRM(vm_dma_ops) = {
- .nopage = DRM(vm_dma_nopage),
- .open = DRM(vm_open),
- .close = DRM(vm_close),
-};
-
-/** Scatter-gather virtual memory operations */
-static struct vm_operations_struct DRM(vm_sg_ops) = {
- .nopage = DRM(vm_sg_nopage),
- .open = DRM(vm_open),
- .close = DRM(vm_close),
-};
-
-
-/**
- * \c open method for shared virtual memory.
- *
- * \param vma virtual memory area.
- *
- * Create a new drm_vma_entry structure as the \p vma private data entry and
- * add it to drm_device::vmalist.
- */
-void DRM(vm_open)(struct vm_area_struct *vma)
-{
- drm_file_t *priv = vma->vm_file->private_data;
- drm_device_t *dev = priv->dev;
- drm_vma_entry_t *vma_entry;
-
- DRM_DEBUG("0x%08lx,0x%08lx\n",
- vma->vm_start, vma->vm_end - vma->vm_start);
- atomic_inc(&dev->vma_count);
-
- vma_entry = DRM(alloc)(sizeof(*vma_entry), DRM_MEM_VMAS);
- if (vma_entry) {
- down(&dev->struct_sem);
- vma_entry->vma = vma;
- vma_entry->next = dev->vmalist;
- vma_entry->pid = current->pid;
- dev->vmalist = vma_entry;
- up(&dev->struct_sem);
- }
-}
-
-/**
- * \c close method for all virtual memory types.
- *
- * \param vma virtual memory area.
- *
- * Search the \p vma private data entry in drm_device::vmalist, unlink it, and
- * free it.
- */
-void DRM(vm_close)(struct vm_area_struct *vma)
-{
- drm_file_t *priv = vma->vm_file->private_data;
- drm_device_t *dev = priv->dev;
- drm_vma_entry_t *pt, *prev;
-
- DRM_DEBUG("0x%08lx,0x%08lx\n",
- vma->vm_start, vma->vm_end - vma->vm_start);
- atomic_dec(&dev->vma_count);
-
- down(&dev->struct_sem);
- for (pt = dev->vmalist, prev = NULL; pt; prev = pt, pt = pt->next) {
- if (pt->vma == vma) {
- if (prev) {
- prev->next = pt->next;
- } else {
- dev->vmalist = pt->next;
- }
- DRM(free)(pt, sizeof(*pt), DRM_MEM_VMAS);
- break;
- }
- }
- up(&dev->struct_sem);
-}
-
-/**
- * mmap DMA memory.
- *
- * \param filp file pointer.
- * \param vma virtual memory area.
- * \return zero on success or a negative number on failure.
- *
- * Sets the virtual memory area operations structure to vm_dma_ops, the file
- * pointer, and calls vm_open().
- */
-int DRM(mmap_dma)(struct file *filp, struct vm_area_struct *vma)
-{
- drm_file_t *priv = filp->private_data;
- drm_device_t *dev;
- drm_device_dma_t *dma;
- unsigned long length = vma->vm_end - vma->vm_start;
-
- lock_kernel();
- dev = priv->dev;
- dma = dev->dma;
- DRM_DEBUG("start = 0x%lx, end = 0x%lx, offset = 0x%lx\n",
- vma->vm_start, vma->vm_end, VM_OFFSET(vma));
-
- /* Length must match exact page count */
- if (!dma || (length >> PAGE_SHIFT) != dma->page_count) {
- unlock_kernel();
- return -EINVAL;
- }
- unlock_kernel();
-
- vma->vm_ops = &DRM(vm_dma_ops);
-
-#if LINUX_VERSION_CODE <= 0x02040e /* KERNEL_VERSION(2,4,14) */
- vma->vm_flags |= VM_LOCKED | VM_SHM; /* Don't swap */
-#else
- vma->vm_flags |= VM_RESERVED; /* Don't swap */
-#endif
-
- vma->vm_file = filp; /* Needed for drm_vm_open() */
- DRM(vm_open)(vma);
- return 0;
-}
-
-unsigned long DRM(core_get_map_ofs)(drm_map_t *map)
-{
- return map->offset;
-}
-
-unsigned long DRM(core_get_reg_ofs)(struct drm_device *dev)
-{
-#ifdef __alpha__
- return dev->hose->dense_mem_base - dev->hose->mem_space->start;
-#else
- return 0;
-#endif
-}
-
-/**
- * mmap DMA memory.
- *
- * \param filp file pointer.
- * \param vma virtual memory area.
- * \return zero on success or a negative number on failure.
- *
- * If the virtual memory area has no offset associated with it then it's a DMA
- * area, so calls mmap_dma(). Otherwise searches the map in drm_device::maplist,
- * checks that the restricted flag is not set, sets the virtual memory operations
- * according to the mapping type and remaps the pages. Finally sets the file
- * pointer and calls vm_open().
- */
-int DRM(mmap)(struct file *filp, struct vm_area_struct *vma)
-{
- drm_file_t *priv = filp->private_data;
- drm_device_t *dev = priv->dev;
- drm_map_t *map = NULL;
- drm_map_list_t *r_list;
- unsigned long offset = 0;
- struct list_head *list;
-
- DRM_DEBUG("start = 0x%lx, end = 0x%lx, offset = 0x%lx\n",
- vma->vm_start, vma->vm_end, VM_OFFSET(vma));
-
- if ( !priv->authenticated ) return -EACCES;
-
- /* We check for "dma". On Apple's UniNorth, it's valid to have
- * the AGP mapped at physical address 0
- * --BenH.
- */
- if (!VM_OFFSET(vma)
-#if __OS_HAS_AGP
- && (!dev->agp || dev->agp->agp_info.device->vendor != PCI_VENDOR_ID_APPLE)
-#endif
- )
- return DRM(mmap_dma)(filp, vma);
-
- /* A sequential search of a linked list is
- fine here because: 1) there will only be
- about 5-10 entries in the list and, 2) a
- DRI client only has to do this mapping
- once, so it doesn't have to be optimized
- for performance, even if the list was a
- bit longer. */
- list_for_each(list, &dev->maplist->head) {
- unsigned long off;
-
- r_list = list_entry(list, drm_map_list_t, head);
- map = r_list->map;
- if (!map) continue;
- off = dev->fn_tbl.get_map_ofs(map);
- if (off == VM_OFFSET(vma)) break;
- }
-
- if (!map || ((map->flags&_DRM_RESTRICTED) && !capable(CAP_SYS_ADMIN)))
- return -EPERM;
-
- /* Check for valid size. */
- if (map->size < vma->vm_end - vma->vm_start) return -EINVAL;
-
- if (!capable(CAP_SYS_ADMIN) && (map->flags & _DRM_READ_ONLY)) {
- vma->vm_flags &= ~(VM_WRITE | VM_MAYWRITE);
-#if defined(__i386__) || defined(__x86_64__)
- pgprot_val(vma->vm_page_prot) &= ~_PAGE_RW;
-#else
- /* Ye gads this is ugly. With more thought
- we could move this up higher and use
- `protection_map' instead. */
- vma->vm_page_prot = __pgprot(pte_val(pte_wrprotect(
- __pte(pgprot_val(vma->vm_page_prot)))));
-#endif
- }
-
- switch (map->type) {
- case _DRM_AGP:
- if (drm_core_has_AGP(dev) && dev->agp->cant_use_aperture) {
- /*
- * On some platforms we can't talk to bus dma address from the CPU, so for
- * memory of type DRM_AGP, we'll deal with sorting out the real physical
- * pages and mappings in nopage()
- */
-#if defined(__powerpc__)
- pgprot_val(vma->vm_page_prot) |= _PAGE_NO_CACHE;
-#endif
- vma->vm_ops = &DRM(vm_ops);
- break;
- }
- /* fall through to _DRM_FRAME_BUFFER... */
- case _DRM_FRAME_BUFFER:
- case _DRM_REGISTERS:
- if (VM_OFFSET(vma) >= __pa(high_memory)) {
-#if defined(__i386__) || defined(__x86_64__)
- if (boot_cpu_data.x86 > 3 && map->type != _DRM_AGP) {
- pgprot_val(vma->vm_page_prot) |= _PAGE_PCD;
- pgprot_val(vma->vm_page_prot) &= ~_PAGE_PWT;
- }
-#elif defined(__powerpc__)
- pgprot_val(vma->vm_page_prot) |= _PAGE_NO_CACHE | _PAGE_GUARDED;
-#endif
- vma->vm_flags |= VM_IO; /* not in core dump */
- }
-#if defined(__ia64__)
- if (map->type != _DRM_AGP)
- vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
-#endif
- offset = dev->fn_tbl.get_reg_ofs(dev);
-#ifdef __sparc__
- if (io_remap_page_range(DRM_RPR_ARG(vma) vma->vm_start,
- VM_OFFSET(vma) + offset,
- vma->vm_end - vma->vm_start,
- vma->vm_page_prot, 0))
-#else
- if (remap_page_range(DRM_RPR_ARG(vma) vma->vm_start,
- VM_OFFSET(vma) + offset,
- vma->vm_end - vma->vm_start,
- vma->vm_page_prot))
-#endif
- return -EAGAIN;
- DRM_DEBUG(" Type = %d; start = 0x%lx, end = 0x%lx,"
- " offset = 0x%lx\n",
- map->type,
- vma->vm_start, vma->vm_end, VM_OFFSET(vma) + offset);
- vma->vm_ops = &DRM(vm_ops);
- break;
- case _DRM_SHM:
- vma->vm_ops = &DRM(vm_shm_ops);
- vma->vm_private_data = (void *)map;
- /* Don't let this area swap. Change when
- DRM_KERNEL advisory is supported. */
-#if LINUX_VERSION_CODE <= 0x02040e /* KERNEL_VERSION(2,4,14) */
- vma->vm_flags |= VM_LOCKED;
-#else
- vma->vm_flags |= VM_RESERVED;
-#endif
- break;
- case _DRM_SCATTER_GATHER:
- vma->vm_ops = &DRM(vm_sg_ops);
- vma->vm_private_data = (void *)map;
-#if LINUX_VERSION_CODE <= 0x02040e /* KERNEL_VERSION(2,4,14) */
- vma->vm_flags |= VM_LOCKED;
-#else
- vma->vm_flags |= VM_RESERVED;
-#endif
- break;
- default:
- return -EINVAL; /* This should never happen. */
- }
-#if LINUX_VERSION_CODE <= 0x02040e /* KERNEL_VERSION(2,4,14) */
- vma->vm_flags |= VM_LOCKED | VM_SHM; /* Don't swap */
-#else
- vma->vm_flags |= VM_RESERVED; /* Don't swap */
-#endif
-
- vma->vm_file = filp; /* Needed for drm_vm_open() */
- DRM(vm_open)(vma);
- return 0;
-}
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