--- /dev/null
+/**
+ * \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_internal.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);
+ }
+}
+
+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().
+ */
+static 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_legacy_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_legacy_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;
+}
Code Review / kvmfornfv.git / blobdiff