| /** |
| * \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 <drm/drmP.h> |
| #include <linux/export.h> |
| #include <linux/seq_file.h> |
| #if defined(__ia64__) |
| #include <linux/efi.h> |
| #include <linux/slab.h> |
| #endif |
| #include <asm/pgtable.h> |
| #include "drm_legacy.h" |
| |
| struct drm_vma_entry { |
| struct list_head head; |
| struct vm_area_struct *vma; |
| pid_t pid; |
| }; |
| |
| static void drm_vm_open(struct vm_area_struct *vma); |
| static void drm_vm_close(struct vm_area_struct *vma); |
| |
| static pgprot_t drm_io_prot(struct drm_local_map *map, |
| struct vm_area_struct *vma) |
| { |
| pgprot_t tmp = vm_get_page_prot(vma->vm_flags); |
| |
| #if defined(__i386__) || defined(__x86_64__) || defined(__powerpc__) |
| if (map->type == _DRM_REGISTERS && !(map->flags & _DRM_WRITE_COMBINING)) |
| tmp = pgprot_noncached(tmp); |
| else |
| tmp = pgprot_writecombine(tmp); |
| #elif defined(__ia64__) |
| if (efi_range_is_wc(vma->vm_start, vma->vm_end - |
| vma->vm_start)) |
| tmp = pgprot_writecombine(tmp); |
| else |
| tmp = pgprot_noncached(tmp); |
| #elif defined(__sparc__) || defined(__arm__) || defined(__mips__) |
| tmp = pgprot_noncached(tmp); |
| #endif |
| return tmp; |
| } |
| |
| static pgprot_t drm_dma_prot(uint32_t map_type, struct vm_area_struct *vma) |
| { |
| pgprot_t tmp = vm_get_page_prot(vma->vm_flags); |
| |
| #if defined(__powerpc__) && defined(CONFIG_NOT_COHERENT_CACHE) |
| tmp |= _PAGE_NO_CACHE; |
| #endif |
| return tmp; |
| } |
| |
| /** |
| * \c fault 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 int drm_do_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
| { |
| struct drm_file *priv = vma->vm_file->private_data; |
| struct drm_device *dev = priv->minor->dev; |
| struct drm_local_map *map = NULL; |
| struct drm_map_list *r_list; |
| struct drm_hash_item *hash; |
| |
| /* |
| * Find the right map |
| */ |
| if (!dev->agp) |
| goto vm_fault_error; |
| |
| if (!dev->agp || !dev->agp->cant_use_aperture) |
| goto vm_fault_error; |
| |
| if (drm_ht_find_item(&dev->map_hash, vma->vm_pgoff, &hash)) |
| goto vm_fault_error; |
| |
| r_list = drm_hash_entry(hash, struct drm_map_list, hash); |
| map = r_list->map; |
| |
| if (map && map->type == _DRM_AGP) { |
| /* |
| * Using vm_pgoff as a selector forces us to use this unusual |
| * addressing scheme. |
| */ |
| resource_size_t offset = (unsigned long)vmf->virtual_address - |
| vma->vm_start; |
| resource_size_t 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->head == &dev->agp->memory) |
| goto vm_fault_error; |
| |
| /* |
| * Get the page, inc the use count, and return it |
| */ |
| offset = (baddr - agpmem->bound) >> PAGE_SHIFT; |
| page = agpmem->memory->pages[offset]; |
| get_page(page); |
| vmf->page = page; |
| |
| DRM_DEBUG |
| ("baddr = 0x%llx page = 0x%p, offset = 0x%llx, count=%d\n", |
| (unsigned long long)baddr, |
| agpmem->memory->pages[offset], |
| (unsigned long long)offset, |
| page_count(page)); |
| return 0; |
| } |
| vm_fault_error: |
| return VM_FAULT_SIGBUS; /* Disallow mremap */ |
| } |
| #else /* __OS_HAS_AGP */ |
| static int drm_do_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
| { |
| return VM_FAULT_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 int drm_do_vm_shm_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
| { |
| struct drm_local_map *map = vma->vm_private_data; |
| unsigned long offset; |
| unsigned long i; |
| struct page *page; |
| |
| if (!map) |
| return VM_FAULT_SIGBUS; /* Nothing allocated */ |
| |
| offset = (unsigned long)vmf->virtual_address - vma->vm_start; |
| i = (unsigned long)map->handle + offset; |
| page = vmalloc_to_page((void *)i); |
| if (!page) |
| return VM_FAULT_SIGBUS; |
| get_page(page); |
| vmf->page = page; |
| |
| DRM_DEBUG("shm_fault 0x%lx\n", offset); |
| return 0; |
| } |
| |
| /** |
| * \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. |
| */ |
| static void drm_vm_shm_close(struct vm_area_struct *vma) |
| { |
| struct drm_file *priv = vma->vm_file->private_data; |
| struct drm_device *dev = priv->minor->dev; |
| struct drm_vma_entry *pt, *temp; |
| struct drm_local_map *map; |
| struct drm_map_list *r_list; |
| int found_maps = 0; |
| |
| DRM_DEBUG("0x%08lx,0x%08lx\n", |
| vma->vm_start, vma->vm_end - vma->vm_start); |
| |
| map = vma->vm_private_data; |
| |
| mutex_lock(&dev->struct_mutex); |
| list_for_each_entry_safe(pt, temp, &dev->vmalist, head) { |
| if (pt->vma->vm_private_data == map) |
| found_maps++; |
| if (pt->vma == vma) { |
| list_del(&pt->head); |
| kfree(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_for_each_entry(r_list, &dev->maplist, head) { |
| if (r_list->map == map) |
| found_maps++; |
| } |
| |
| if (!found_maps) { |
| drm_dma_handle_t dmah; |
| |
| switch (map->type) { |
| case _DRM_REGISTERS: |
| case _DRM_FRAME_BUFFER: |
| arch_phys_wc_del(map->mtrr); |
| iounmap(map->handle); |
| break; |
| case _DRM_SHM: |
| vfree(map->handle); |
| break; |
| case _DRM_AGP: |
| case _DRM_SCATTER_GATHER: |
| break; |
| case _DRM_CONSISTENT: |
| dmah.vaddr = map->handle; |
| dmah.busaddr = map->offset; |
| dmah.size = map->size; |
| __drm_legacy_pci_free(dev, &dmah); |
| break; |
| } |
| kfree(map); |
| } |
| } |
| mutex_unlock(&dev->struct_mutex); |
| } |
| |
| /** |
| * \c fault 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 int drm_do_vm_dma_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
| { |
| 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 VM_FAULT_SIGBUS; /* Error */ |
| if (!dma->pagelist) |
| return VM_FAULT_SIGBUS; /* Nothing allocated */ |
| |
| offset = (unsigned long)vmf->virtual_address - vma->vm_start; /* vm_[pg]off[set] should be 0 */ |
| page_nr = offset >> PAGE_SHIFT; /* page_nr could just be vmf->pgoff */ |
| page = virt_to_page((void *)dma->pagelist[page_nr]); |
| |
| get_page(page); |
| vmf->page = page; |
| |
| DRM_DEBUG("dma_fault 0x%lx (page %lu)\n", offset, page_nr); |
| return 0; |
| } |
| |
| /** |
| * \c fault 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 int drm_do_vm_sg_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
| { |
| struct drm_local_map *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; |
| |
| if (!entry) |
| return VM_FAULT_SIGBUS; /* Error */ |
| if (!entry->pagelist) |
| return VM_FAULT_SIGBUS; /* Nothing allocated */ |
| |
| offset = (unsigned long)vmf->virtual_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); |
| vmf->page = page; |
| |
| return 0; |
| } |
| |
| static int drm_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
| { |
| return drm_do_vm_fault(vma, vmf); |
| } |
| |
| static int drm_vm_shm_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
| { |
| return drm_do_vm_shm_fault(vma, vmf); |
| } |
| |
| static int drm_vm_dma_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
| { |
| return drm_do_vm_dma_fault(vma, vmf); |
| } |
| |
| static int drm_vm_sg_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
| { |
| return drm_do_vm_sg_fault(vma, vmf); |
| } |
| |
| /** AGP virtual memory operations */ |
| static const struct vm_operations_struct drm_vm_ops = { |
| .fault = drm_vm_fault, |
| .open = drm_vm_open, |
| .close = drm_vm_close, |
| }; |
| |
| /** Shared virtual memory operations */ |
| static const struct vm_operations_struct drm_vm_shm_ops = { |
| .fault = drm_vm_shm_fault, |
| .open = drm_vm_open, |
| .close = drm_vm_shm_close, |
| }; |
| |
| /** DMA virtual memory operations */ |
| static const struct vm_operations_struct drm_vm_dma_ops = { |
| .fault = drm_vm_dma_fault, |
| .open = drm_vm_open, |
| .close = drm_vm_close, |
| }; |
| |
| /** Scatter-gather virtual memory operations */ |
| static const struct vm_operations_struct drm_vm_sg_ops = { |
| .fault = drm_vm_sg_fault, |
| .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_locked(struct drm_device *dev, |
| struct vm_area_struct *vma) |
| { |
| struct drm_vma_entry *vma_entry; |
| |
| DRM_DEBUG("0x%08lx,0x%08lx\n", |
| vma->vm_start, vma->vm_end - vma->vm_start); |
| |
| vma_entry = kmalloc(sizeof(*vma_entry), GFP_KERNEL); |
| if (vma_entry) { |
| vma_entry->vma = vma; |
| vma_entry->pid = current->pid; |
| list_add(&vma_entry->head, &dev->vmalist); |
| } |
| } |
| EXPORT_SYMBOL_GPL(drm_vm_open_locked); |
| |
| static void drm_vm_open(struct vm_area_struct *vma) |
| { |
| struct drm_file *priv = vma->vm_file->private_data; |
| struct drm_device *dev = priv->minor->dev; |
| |
| mutex_lock(&dev->struct_mutex); |
| drm_vm_open_locked(dev, vma); |
| mutex_unlock(&dev->struct_mutex); |
| } |
| |
| void drm_vm_close_locked(struct drm_device *dev, |
| struct vm_area_struct *vma) |
| { |
| struct drm_vma_entry *pt, *temp; |
| |
| DRM_DEBUG("0x%08lx,0x%08lx\n", |
| vma->vm_start, vma->vm_end - vma->vm_start); |
| |
| list_for_each_entry_safe(pt, temp, &dev->vmalist, head) { |
| if (pt->vma == vma) { |
| list_del(&pt->head); |
| kfree(pt); |
| break; |
| } |
| } |
| } |
| |
| /** |
| * \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. |
| */ |
| static void drm_vm_close(struct vm_area_struct *vma) |
| { |
| struct drm_file *priv = vma->vm_file->private_data; |
| struct drm_device *dev = priv->minor->dev; |
| |
| mutex_lock(&dev->struct_mutex); |
| drm_vm_close_locked(dev, vma); |
| mutex_unlock(&dev->struct_mutex); |
| } |
| |
| /** |
| * mmap DMA memory. |
| * |
| * \param file_priv DRM file private. |
| * \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(). |
| */ |
| static int drm_mmap_dma(struct file *filp, struct vm_area_struct *vma) |
| { |
| struct drm_file *priv = filp->private_data; |
| struct drm_device *dev; |
| struct drm_device_dma *dma; |
| unsigned long length = vma->vm_end - vma->vm_start; |
| |
| dev = priv->minor->dev; |
| dma = dev->dma; |
| DRM_DEBUG("start = 0x%lx, end = 0x%lx, page offset = 0x%lx\n", |
| vma->vm_start, vma->vm_end, vma->vm_pgoff); |
| |
| /* Length must match exact page count */ |
| if (!dma || (length >> PAGE_SHIFT) != dma->page_count) { |
| return -EINVAL; |
| } |
| |
| if (!capable(CAP_SYS_ADMIN) && |
| (dma->flags & _DRM_DMA_USE_PCI_RO)) { |
| 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 |
| } |
| |
| vma->vm_ops = &drm_vm_dma_ops; |
| |
| vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; |
| |
| drm_vm_open_locked(dev, vma); |
| return 0; |
| } |
| |
| static resource_size_t drm_core_get_reg_ofs(struct drm_device *dev) |
| { |
| #ifdef __alpha__ |
| return dev->hose->dense_mem_base; |
| #else |
| return 0; |
| #endif |
| } |
| |
| /** |
| * mmap DMA memory. |
| * |
| * \param file_priv DRM file private. |
| * \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_locked(struct file *filp, struct vm_area_struct *vma) |
| { |
| struct drm_file *priv = filp->private_data; |
| struct drm_device *dev = priv->minor->dev; |
| struct drm_local_map *map = NULL; |
| resource_size_t offset = 0; |
| struct drm_hash_item *hash; |
| |
| DRM_DEBUG("start = 0x%lx, end = 0x%lx, page offset = 0x%lx\n", |
| vma->vm_start, vma->vm_end, vma->vm_pgoff); |
| |
| 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 (!vma->vm_pgoff |
| #if __OS_HAS_AGP |
| && (!dev->agp |
| || dev->agp->agp_info.device->vendor != PCI_VENDOR_ID_APPLE) |
| #endif |
| ) |
| return drm_mmap_dma(filp, vma); |
| |
| if (drm_ht_find_item(&dev->map_hash, vma->vm_pgoff, &hash)) { |
| DRM_ERROR("Could not find map\n"); |
| return -EINVAL; |
| } |
| |
| map = drm_hash_entry(hash, struct drm_map_list, hash)->map; |
| 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) { |
| #if !defined(__arm__) |
| case _DRM_AGP: |
| if (dev->agp && 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 fault() |
| */ |
| #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... */ |
| #endif |
| case _DRM_FRAME_BUFFER: |
| case _DRM_REGISTERS: |
| offset = drm_core_get_reg_ofs(dev); |
| vma->vm_page_prot = drm_io_prot(map, vma); |
| if (io_remap_pfn_range(vma, vma->vm_start, |
| (map->offset + offset) >> PAGE_SHIFT, |
| vma->vm_end - vma->vm_start, |
| vma->vm_page_prot)) |
| return -EAGAIN; |
| DRM_DEBUG(" Type = %d; start = 0x%lx, end = 0x%lx," |
| " offset = 0x%llx\n", |
| map->type, |
| vma->vm_start, vma->vm_end, (unsigned long long)(map->offset + offset)); |
| |
| vma->vm_ops = &drm_vm_ops; |
| break; |
| case _DRM_CONSISTENT: |
| /* Consistent memory is really like shared memory. But |
| * it's allocated in a different way, so avoid fault */ |
| if (remap_pfn_range(vma, vma->vm_start, |
| page_to_pfn(virt_to_page(map->handle)), |
| vma->vm_end - vma->vm_start, vma->vm_page_prot)) |
| return -EAGAIN; |
| vma->vm_page_prot = drm_dma_prot(map->type, vma); |
| /* fall through to _DRM_SHM */ |
| case _DRM_SHM: |
| vma->vm_ops = &drm_vm_shm_ops; |
| vma->vm_private_data = (void *)map; |
| break; |
| case _DRM_SCATTER_GATHER: |
| vma->vm_ops = &drm_vm_sg_ops; |
| vma->vm_private_data = (void *)map; |
| vma->vm_page_prot = drm_dma_prot(map->type, vma); |
| break; |
| default: |
| return -EINVAL; /* This should never happen. */ |
| } |
| vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; |
| |
| drm_vm_open_locked(dev, vma); |
| return 0; |
| } |
| |
| int drm_mmap(struct file *filp, struct vm_area_struct *vma) |
| { |
| struct drm_file *priv = filp->private_data; |
| struct drm_device *dev = priv->minor->dev; |
| int ret; |
| |
| if (drm_device_is_unplugged(dev)) |
| return -ENODEV; |
| |
| mutex_lock(&dev->struct_mutex); |
| ret = drm_mmap_locked(filp, vma); |
| mutex_unlock(&dev->struct_mutex); |
| |
| return ret; |
| } |
| EXPORT_SYMBOL(drm_mmap); |
| |
| void drm_legacy_vma_flush(struct drm_device *dev) |
| { |
| struct drm_vma_entry *vma, *vma_temp; |
| |
| /* Clear vma list (only needed for legacy drivers) */ |
| list_for_each_entry_safe(vma, vma_temp, &dev->vmalist, head) { |
| list_del(&vma->head); |
| kfree(vma); |
| } |
| } |
| |
| int drm_vma_info(struct seq_file *m, void *data) |
| { |
| struct drm_info_node *node = (struct drm_info_node *) m->private; |
| struct drm_device *dev = node->minor->dev; |
| struct drm_vma_entry *pt; |
| struct vm_area_struct *vma; |
| unsigned long vma_count = 0; |
| #if defined(__i386__) |
| unsigned int pgprot; |
| #endif |
| |
| mutex_lock(&dev->struct_mutex); |
| list_for_each_entry(pt, &dev->vmalist, head) |
| vma_count++; |
| |
| seq_printf(m, "vma use count: %lu, high_memory = %pK, 0x%pK\n", |
| vma_count, high_memory, |
| (void *)(unsigned long)virt_to_phys(high_memory)); |
| |
| list_for_each_entry(pt, &dev->vmalist, head) { |
| vma = pt->vma; |
| if (!vma) |
| continue; |
| seq_printf(m, |
| "\n%5d 0x%pK-0x%pK %c%c%c%c%c%c 0x%08lx000", |
| pt->pid, |
| (void *)vma->vm_start, (void *)vma->vm_end, |
| vma->vm_flags & VM_READ ? 'r' : '-', |
| vma->vm_flags & VM_WRITE ? 'w' : '-', |
| vma->vm_flags & VM_EXEC ? 'x' : '-', |
| vma->vm_flags & VM_MAYSHARE ? 's' : 'p', |
| vma->vm_flags & VM_LOCKED ? 'l' : '-', |
| vma->vm_flags & VM_IO ? 'i' : '-', |
| vma->vm_pgoff); |
| |
| #if defined(__i386__) |
| pgprot = pgprot_val(vma->vm_page_prot); |
| seq_printf(m, " %c%c%c%c%c%c%c%c%c", |
| pgprot & _PAGE_PRESENT ? 'p' : '-', |
| pgprot & _PAGE_RW ? 'w' : 'r', |
| pgprot & _PAGE_USER ? 'u' : 's', |
| pgprot & _PAGE_PWT ? 't' : 'b', |
| pgprot & _PAGE_PCD ? 'u' : 'c', |
| pgprot & _PAGE_ACCESSED ? 'a' : '-', |
| pgprot & _PAGE_DIRTY ? 'd' : '-', |
| pgprot & _PAGE_PSE ? 'm' : 'k', |
| pgprot & _PAGE_GLOBAL ? 'g' : 'l'); |
| #endif |
| seq_printf(m, "\n"); |
| } |
| mutex_unlock(&dev->struct_mutex); |
| return 0; |
| } |