/**
- * \file drm_vm.h
+ * \file drm_vm.c
* Memory mapping for DRM
- *
+ *
* \author Rickard E. (Rik) Faith <faith@valinux.com>
* \author Gareth Hughes <gareth@valinux.com>
*/
* \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)
+ unsigned long address)
{
- drm_file_t *priv = vma->vm_file->private_data;
+ drm_file_t *priv = vma->vm_file->private_data;
drm_device_t *dev = priv->head->dev;
- drm_map_t *map = NULL;
- drm_map_list_t *r_list;
+ drm_map_t *map = NULL;
+ drm_map_list_t *r_list;
struct list_head *list;
/*
- * Find the right map
- */
+ * 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 (!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)
+ continue;
if (r_list->user_token == VM_OFFSET(vma))
break;
}
#ifdef __alpha__
/*
- * Adjust to a bus-relative address
- */
+ * 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) {
+ * 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)
+ agpmem->bound + agpmem->pages * PAGE_SIZE > baddr)
break;
}
- if (!agpmem) goto vm_nopage_error;
+ if (!agpmem)
+ goto vm_nopage_error;
/*
- * Get the page, inc the use count, and return it
- */
+ * 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);
- DRM_DEBUG("baddr = 0x%lx page = 0x%p, offset = 0x%lx, count=%d\n",
- baddr, __va(agpmem->memory->memory[offset]), offset,
- page_count(page));
+ DRM_DEBUG
+ ("baddr = 0x%lx page = 0x%p, offset = 0x%lx, count=%d\n",
+ baddr, __va(agpmem->memory->memory[offset]), offset,
+ page_count(page));
return page;
- }
-vm_nopage_error:
- return NOPAGE_SIGBUS; /* Disallow mremap */
+ }
+ vm_nopage_error:
+ return NOPAGE_SIGBUS; /* Disallow mremap */
}
-#else /* __OS_HAS_AGP */
+#else /* __OS_HAS_AGP */
static __inline__ struct page *drm_do_vm_nopage(struct vm_area_struct *vma,
- unsigned long address)
+ unsigned long address)
{
return NOPAGE_SIGBUS;
}
-#endif /* __OS_HAS_AGP */
+#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)
+ unsigned long address)
{
- drm_map_t *map = (drm_map_t *)vma->vm_private_data;
- unsigned long offset;
- unsigned long i;
- struct page *page;
+ 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 */
+ if (address > vma->vm_end)
+ return NOPAGE_SIGBUS; /* Disallow mremap */
+ if (!map)
+ return NOPAGE_OOM; /* Nothing allocated */
- offset = address - vma->vm_start;
+ offset = address - vma->vm_start;
i = (unsigned long)map->handle + offset;
- page = vmalloc_to_page((void *)i);
+ page = (map->type == _DRM_CONSISTENT) ?
+ virt_to_page((void *)i) : vmalloc_to_page((void *)i);
if (!page)
return NOPAGE_OOM;
get_page(page);
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.
*/
static void drm_vm_shm_close(struct vm_area_struct *vma)
{
- drm_file_t *priv = vma->vm_file->private_data;
- drm_device_t *dev = priv->head->dev;
+ drm_file_t *priv = vma->vm_file->private_data;
+ drm_device_t *dev = priv->head->dev;
drm_vma_entry_t *pt, *prev, *next;
drm_map_t *map;
drm_map_list_t *r_list;
map = vma->vm_private_data;
- down(&dev->struct_sem);
+ mutex_lock(&dev->struct_mutex);
for (pt = dev->vmalist, prev = NULL; pt; pt = next) {
next = pt->next;
- if (pt->vma->vm_private_data == map) found_maps++;
+ if (pt->vma->vm_private_data == map)
+ found_maps++;
if (pt->vma == vma) {
if (prev) {
prev->next = pt->next;
}
}
/* We were the only map that was found */
- if(found_maps == 1 &&
- map->flags & _DRM_REMOVABLE) {
+ 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.
*/
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 (r_list->map == map)
+ found_maps++;
}
- if(!found_maps) {
+ if (!found_maps) {
drm_dma_handle_t dmah;
switch (map->type) {
drm_free(map, sizeof(*map), DRM_MEM_MAPS);
}
}
- up(&dev->struct_sem);
+ mutex_unlock(&dev->struct_mutex);
}
/**
* \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)
+ unsigned long address)
{
- drm_file_t *priv = vma->vm_file->private_data;
- drm_device_t *dev = priv->head->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))));
+ drm_file_t *priv = vma->vm_file->private_data;
+ drm_device_t *dev = priv->head->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);
* \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)
+ unsigned long address)
{
- drm_map_t *map = (drm_map_t *)vma->vm_private_data;
+ 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->head->dev;
drm_sg_mem_t *entry = dev->sg;
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 */
-
+ 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 - (unsigned long)dev->sg->virtual;
return page;
}
-
static struct page *drm_vm_nopage(struct vm_area_struct *vma,
- unsigned long address,
- int *type) {
- if (type) *type = VM_FAULT_MINOR;
+ 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;
+ 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;
+ 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;
+ unsigned long address, int *type)
+{
+ if (type)
+ *type = VM_FAULT_MINOR;
return drm_do_vm_sg_nopage(vma, address);
}
/** AGP virtual memory operations */
-static struct vm_operations_struct drm_vm_ops = {
+static struct vm_operations_struct drm_vm_ops = {
.nopage = drm_vm_nopage,
- .open = drm_vm_open,
- .close = drm_vm_close,
+ .open = drm_vm_open,
+ .close = drm_vm_close,
};
/** Shared virtual memory operations */
-static struct vm_operations_struct drm_vm_shm_ops = {
+static struct vm_operations_struct drm_vm_shm_ops = {
.nopage = drm_vm_shm_nopage,
- .open = drm_vm_open,
- .close = drm_vm_shm_close,
+ .open = drm_vm_open,
+ .close = drm_vm_shm_close,
};
/** DMA virtual memory operations */
-static struct vm_operations_struct drm_vm_dma_ops = {
+static struct vm_operations_struct drm_vm_dma_ops = {
.nopage = drm_vm_dma_nopage,
- .open = drm_vm_open,
- .close = drm_vm_close,
+ .open = drm_vm_open,
+ .close = drm_vm_close,
};
/** Scatter-gather virtual memory operations */
-static struct vm_operations_struct drm_vm_sg_ops = {
+static struct vm_operations_struct drm_vm_sg_ops = {
.nopage = drm_vm_sg_nopage,
- .open = drm_vm_open,
- .close = drm_vm_close,
+ .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.
*/
static void drm_vm_open(struct vm_area_struct *vma)
{
- drm_file_t *priv = vma->vm_file->private_data;
- drm_device_t *dev = priv->head->dev;
+ drm_file_t *priv = vma->vm_file->private_data;
+ drm_device_t *dev = priv->head->dev;
drm_vma_entry_t *vma_entry;
DRM_DEBUG("0x%08lx,0x%08lx\n",
vma_entry = drm_alloc(sizeof(*vma_entry), DRM_MEM_VMAS);
if (vma_entry) {
- down(&dev->struct_sem);
- vma_entry->vma = vma;
+ mutex_lock(&dev->struct_mutex);
+ vma_entry->vma = vma;
vma_entry->next = dev->vmalist;
- vma_entry->pid = current->pid;
- dev->vmalist = vma_entry;
- up(&dev->struct_sem);
+ vma_entry->pid = current->pid;
+ dev->vmalist = vma_entry;
+ mutex_unlock(&dev->struct_mutex);
}
}
/**
* \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)
{
- drm_file_t *priv = vma->vm_file->private_data;
- drm_device_t *dev = priv->head->dev;
+ drm_file_t *priv = vma->vm_file->private_data;
+ drm_device_t *dev = priv->head->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);
+ mutex_lock(&dev->struct_mutex);
for (pt = dev->vmalist, prev = NULL; pt; prev = pt, pt = pt->next) {
if (pt->vma == vma) {
if (prev) {
break;
}
}
- up(&dev->struct_sem);
+ mutex_unlock(&dev->struct_mutex);
}
/**
* \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().
*/
static int drm_mmap_dma(struct file *filp, struct vm_area_struct *vma)
{
- drm_file_t *priv = filp->private_data;
- drm_device_t *dev;
+ 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;
+ unsigned long length = vma->vm_end - vma->vm_start;
lock_kernel();
- dev = priv->head->dev;
- dma = dev->dma;
+ dev = priv->head->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 */
+ /* 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;
+ vma->vm_ops = &drm_vm_dma_ops;
- vma->vm_flags |= VM_RESERVED; /* Don't swap */
+ vma->vm_flags |= VM_RESERVED; /* Don't swap */
- vma->vm_file = filp; /* Needed for drm_vm_open() */
+ 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)
+unsigned long drm_core_get_map_ofs(drm_map_t * map)
{
return map->offset;
}
+
EXPORT_SYMBOL(drm_core_get_map_ofs);
unsigned long drm_core_get_reg_ofs(struct drm_device *dev)
return 0;
#endif
}
+
EXPORT_SYMBOL(drm_core_get_reg_ofs);
/**
* \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
*/
int drm_mmap(struct file *filp, struct vm_area_struct *vma)
{
- drm_file_t *priv = filp->private_data;
- drm_device_t *dev = priv->head->dev;
- drm_map_t *map = NULL;
- drm_map_list_t *r_list;
- unsigned long offset = 0;
+ drm_file_t *priv = filp->private_data;
+ drm_device_t *dev = priv->head->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;
+ 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
*/
if (!VM_OFFSET(vma)
#if __OS_HAS_AGP
- && (!dev->agp || dev->agp->agp_info.device->vendor != PCI_VENDOR_ID_APPLE)
+ && (!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. */
+ /* 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) {
r_list = list_entry(list, drm_map_list_t, head);
map = r_list->map;
- if (!map) continue;
+ if (!map)
+ continue;
if (r_list->user_token == VM_OFFSET(vma))
break;
}
- if (!map || ((map->flags&_DRM_RESTRICTED) && !capable(CAP_SYS_ADMIN)))
+ 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;
+ /* 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)))));
+ /* 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()
- */
+ 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;
+ pgprot_val(vma->vm_page_prot) |= _PAGE_NO_CACHE;
#endif
- vma->vm_ops = &drm_vm_ops;
- break;
- }
- /* fall through to _DRM_FRAME_BUFFER... */
+ vma->vm_ops = &drm_vm_ops;
+ break;
+ }
+ /* fall through to _DRM_FRAME_BUFFER... */
case _DRM_FRAME_BUFFER:
case _DRM_REGISTERS:
#if defined(__i386__) || defined(__x86_64__)
#endif
vma->vm_flags |= VM_IO; /* not in core dump */
#if defined(__ia64__)
- if (efi_range_is_wc(vma->vm_start, vma->vm_end -
- vma->vm_start))
+ if (efi_range_is_wc(vma->vm_start, vma->vm_end - vma->vm_start))
vma->vm_page_prot =
- pgprot_writecombine(vma->vm_page_prot);
+ pgprot_writecombine(vma->vm_page_prot);
else
- vma->vm_page_prot =
- pgprot_noncached(vma->vm_page_prot);
+ vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
#endif
offset = dev->driver->get_reg_ofs(dev);
#ifdef __sparc__
if (io_remap_pfn_range(DRM_RPR_ARG(vma) vma->vm_start,
- (map->offset + offset) >> PAGE_SHIFT,
- vma->vm_end - vma->vm_start,
- vma->vm_page_prot))
+ (map->offset + offset) >> PAGE_SHIFT,
+ vma->vm_end - vma->vm_start,
+ vma->vm_page_prot))
#else
if (io_remap_pfn_range(vma, vma->vm_start,
- (map->offset + offset) >> PAGE_SHIFT,
- vma->vm_end - vma->vm_start,
- vma->vm_page_prot))
+ (map->offset + offset) >> PAGE_SHIFT,
+ vma->vm_end - vma->vm_start,
+ vma->vm_page_prot))
#endif
- return -EAGAIN;
+ return -EAGAIN;
DRM_DEBUG(" Type = %d; start = 0x%lx, end = 0x%lx,"
" offset = 0x%lx\n",
map->type,
* allocate in a different way */
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. */
+ /* Don't let this area swap. Change when
+ DRM_KERNEL advisory is supported. */
vma->vm_flags |= VM_RESERVED;
break;
case _DRM_SCATTER_GATHER:
vma->vm_ops = &drm_vm_sg_ops;
vma->vm_private_data = (void *)map;
vma->vm_flags |= VM_RESERVED;
- break;
+ break;
default:
return -EINVAL; /* This should never happen. */
}
- vma->vm_flags |= VM_RESERVED; /* Don't swap */
+ vma->vm_flags |= VM_RESERVED; /* Don't swap */
- vma->vm_file = filp; /* Needed for drm_vm_open() */
+ vma->vm_file = filp; /* Needed for drm_vm_open() */
drm_vm_open(vma);
return 0;
}
+
EXPORT_SYMBOL(drm_mmap);
git.openpandora.org / pandora-kernel.git / blobdiff