[PATCH 3/3] drm: Make drm_local_map use a resource_size_t offset
Benjamin Herrenschmidt
benh at kernel.crashing.org
Mon Feb 2 16:55:47 EST 2009
This changes drm_local_map to use a resource_size for its "offset"
member instead of an unsigned long, thus allowing 32-bit machines
with a >32-bit physical address space to be able to store there
their register or framebuffer addresses when those are above 4G,
such as when using a PCI video card on a recent AMCC 440 SoC.
This patch isn't as "trivial" as it sounds: A few functions needed
to have some unsigned long/int changed to resource_size_t and a few
printk's had to be adjusted.
But also, because userspace isn't capable of passing such offsets,
I had to modify drm_find_matching_map() to ignore the offset passed
in for maps of type _DRM_FRAMEBUFFER or _DRM_REGISTERS.
If we ever support multiple _DRM_FRAMEBUFFER or _DRM_REGISTERS maps
for a given device, we might have to change that trick, but I don't
think that happens on any current driver.
Signed-off-by: Benjamin Herrenschmidt <benh at kernel.crashing.org>
---
drivers/gpu/drm/drm_bufs.c | 33 ++++++++++++++++++++++++---------
drivers/gpu/drm/drm_proc.c | 4 ++--
drivers/gpu/drm/drm_vm.c | 22 ++++++++++++----------
drivers/gpu/drm/mga/mga_dma.c | 17 +++++++++--------
drivers/gpu/drm/mga/mga_drv.h | 4 ++--
drivers/gpu/drm/r128/r128_cce.c | 7 ++++---
drivers/gpu/drm/radeon/radeon_cp.c | 9 +++++----
include/drm/drmP.h | 12 ++++++------
8 files changed, 64 insertions(+), 44 deletions(-)
--- linux-work.orig/drivers/gpu/drm/drm_bufs.c 2009-02-02 16:29:54.000000000 +1100
+++ linux-work/drivers/gpu/drm/drm_bufs.c 2009-02-02 16:29:54.000000000 +1100
@@ -54,11 +54,25 @@ static struct drm_map_list *drm_find_mat
{
struct drm_map_list *entry;
list_for_each_entry(entry, &dev->maplist, head) {
- if (entry->map && (entry->master == dev->primary->master) && (map->type == entry->map->type) &&
- ((entry->map->offset == map->offset) ||
- ((map->type == _DRM_SHM) && (map->flags&_DRM_CONTAINS_LOCK)))) {
+ /* Due to userspace API breakage, we ignore the map offset
+ * for maps of type _DRM_FRAMEBUFFER or _DRM_REGISTERS
+ */
+ if (!entry->map ||
+ map->type != entry->map->type ||
+ entry->master != dev->primary->master)
+ continue;
+ switch (map->type) {
+ case _DRM_SHM:
+ if (map->flags != _DRM_CONTAINS_LOCK)
+ break;
+ case _DRM_REGISTERS:
+ case _DRM_FRAME_BUFFER:
return entry;
+ default: /* Make gcc happy */
+ ;
}
+ if (entry->map->offset == map->offset)
+ return entry;
}
return NULL;
@@ -96,7 +110,7 @@ static int drm_map_handle(struct drm_dev
* type. Adds the map to the map list drm_device::maplist. Adds MTRR's where
* applicable and if supported by the kernel.
*/
-static int drm_addmap_core(struct drm_device * dev, unsigned int offset,
+static int drm_addmap_core(struct drm_device * dev, resource_size_t offset,
unsigned int size, enum drm_map_type type,
enum drm_map_flags flags,
struct drm_map_list ** maplist)
@@ -124,9 +138,9 @@ static int drm_addmap_core(struct drm_de
drm_free(map, sizeof(*map), DRM_MEM_MAPS);
return -EINVAL;
}
- DRM_DEBUG("offset = 0x%08lx, size = 0x%08lx, type = %d\n",
- map->offset, map->size, map->type);
- if ((map->offset & (~PAGE_MASK)) || (map->size & (~PAGE_MASK))) {
+ DRM_DEBUG("offset = 0x%08llx, size = 0x%08lx, type = %d\n",
+ (unsigned long long)map->offset, map->size, map->type);
+ if ((map->offset & (~(resource_size_t)PAGE_MASK)) || (map->size & (~PAGE_MASK))) {
drm_free(map, sizeof(*map), DRM_MEM_MAPS);
return -EINVAL;
}
@@ -254,7 +268,8 @@ static int drm_addmap_core(struct drm_de
drm_free(map, sizeof(*map), DRM_MEM_MAPS);
return -EPERM;
}
- DRM_DEBUG("AGP offset = 0x%08lx, size = 0x%08lx\n", map->offset, map->size);
+ DRM_DEBUG("AGP offset = 0x%08llx, size = 0x%08lx\n",
+ (unsigned long long)map->offset, map->size);
break;
case _DRM_GEM:
@@ -322,7 +337,7 @@ static int drm_addmap_core(struct drm_de
return 0;
}
-int drm_addmap(struct drm_device * dev, unsigned int offset,
+int drm_addmap(struct drm_device * dev, resource_size_t offset,
unsigned int size, enum drm_map_type type,
enum drm_map_flags flags, struct drm_local_map ** map_ptr)
{
Index: linux-work/drivers/gpu/drm/drm_proc.c
===================================================================
--- linux-work.orig/drivers/gpu/drm/drm_proc.c 2009-02-02 16:29:54.000000000 +1100
+++ linux-work/drivers/gpu/drm/drm_proc.c 2009-02-02 16:29:54.000000000 +1100
@@ -276,9 +276,9 @@ static int drm__vm_info(char *buf, char
type = "??";
else
type = types[map->type];
- DRM_PROC_PRINT("%4d 0x%08lx 0x%08lx %4.4s 0x%02x 0x%08lx ",
+ DRM_PROC_PRINT("%4d 0x%08llx 0x%08lx %4.4s 0x%02x 0x%08lx ",
i,
- map->offset,
+ (unsigned long long)map->offset,
map->size, type, map->flags,
(unsigned long) r_list->user_token);
if (map->mtrr < 0) {
Index: linux-work/drivers/gpu/drm/drm_vm.c
===================================================================
--- linux-work.orig/drivers/gpu/drm/drm_vm.c 2009-02-02 16:29:54.000000000 +1100
+++ linux-work/drivers/gpu/drm/drm_vm.c 2009-02-02 16:29:54.000000000 +1100
@@ -115,9 +115,9 @@ static int drm_do_vm_fault(struct vm_are
* Using vm_pgoff as a selector forces us to use this unusual
* addressing scheme.
*/
- unsigned long offset = (unsigned long)vmf->virtual_address -
- vma->vm_start;
- unsigned long baddr = map->offset + offset;
+ 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;
@@ -149,8 +149,10 @@ static int drm_do_vm_fault(struct vm_are
vmf->page = page;
DRM_DEBUG
- ("baddr = 0x%lx page = 0x%p, offset = 0x%lx, count=%d\n",
- baddr, __va(agpmem->memory->memory[offset]), offset,
+ ("baddr = 0x%llx page = 0x%p, offset = 0x%llx, count=%d\n",
+ (unsigned long long)baddr,
+ __va(agpmem->memory->memory[offset]),
+ (unsigned long long)offset,
page_count(page));
return 0;
}
@@ -512,14 +514,14 @@ static int drm_mmap_dma(struct file *fil
return 0;
}
-unsigned long drm_core_get_map_ofs(struct drm_local_map * map)
+resource_size_t drm_core_get_map_ofs(struct drm_local_map * map)
{
return map->offset;
}
EXPORT_SYMBOL(drm_core_get_map_ofs);
-unsigned long drm_core_get_reg_ofs(struct drm_device *dev)
+resource_size_t drm_core_get_reg_ofs(struct drm_device *dev)
{
#ifdef __alpha__
return dev->hose->dense_mem_base - dev->hose->mem_space->start;
@@ -548,7 +550,7 @@ int drm_mmap_locked(struct file *filp, s
struct drm_file *priv = filp->private_data;
struct drm_device *dev = priv->minor->dev;
struct drm_local_map *map = NULL;
- unsigned long offset = 0;
+ resource_size_t offset = 0;
struct drm_hash_item *hash;
DRM_DEBUG("start = 0x%lx, end = 0x%lx, page offset = 0x%lx\n",
@@ -623,9 +625,9 @@ int drm_mmap_locked(struct file *filp, s
vma->vm_page_prot))
return -EAGAIN;
DRM_DEBUG(" Type = %d; start = 0x%lx, end = 0x%lx,"
- " offset = 0x%lx\n",
+ " offset = 0x%llx\n",
map->type,
- vma->vm_start, vma->vm_end, map->offset + offset);
+ vma->vm_start, vma->vm_end, (unsigned long long)(map->offset + offset));
vma->vm_ops = &drm_vm_ops;
break;
case _DRM_CONSISTENT:
Index: linux-work/drivers/gpu/drm/mga/mga_dma.c
===================================================================
--- linux-work.orig/drivers/gpu/drm/mga/mga_dma.c 2009-02-02 16:29:50.000000000 +1100
+++ linux-work/drivers/gpu/drm/mga/mga_dma.c 2009-02-02 16:29:54.000000000 +1100
@@ -148,8 +148,8 @@ void mga_do_dma_flush(drm_mga_private_t
primary->space = head - tail;
}
- DRM_DEBUG(" head = 0x%06lx\n", head - dev_priv->primary->offset);
- DRM_DEBUG(" tail = 0x%06lx\n", tail - dev_priv->primary->offset);
+ DRM_DEBUG(" head = 0x%06lx\n", (unsigned long)(head - dev_priv->primary->offset));
+ DRM_DEBUG(" tail = 0x%06lx\n", (unsigned long)(tail - dev_priv->primary->offset));
DRM_DEBUG(" space = 0x%06x\n", primary->space);
mga_flush_write_combine();
@@ -187,7 +187,7 @@ void mga_do_dma_wrap_start(drm_mga_priva
primary->space = head - dev_priv->primary->offset;
}
- DRM_DEBUG(" head = 0x%06lx\n", head - dev_priv->primary->offset);
+ DRM_DEBUG(" head = 0x%06lx\n", (unsigned long)(head - dev_priv->primary->offset));
DRM_DEBUG(" tail = 0x%06x\n", primary->tail);
DRM_DEBUG(" wrap = %d\n", primary->last_wrap);
DRM_DEBUG(" space = 0x%06x\n", primary->space);
@@ -239,7 +239,7 @@ static void mga_freelist_print(struct dr
for (entry = dev_priv->head->next; entry; entry = entry->next) {
DRM_INFO(" %p idx=%2d age=0x%x 0x%06lx\n",
entry, entry->buf->idx, entry->age.head,
- entry->age.head - dev_priv->primary->offset);
+ (unsigned long)(entry->age.head - dev_priv->primary->offset));
}
DRM_INFO("\n");
}
@@ -340,10 +340,10 @@ static struct drm_buf *mga_freelist_get(
DRM_DEBUG(" tail=0x%06lx %d\n",
tail->age.head ?
- tail->age.head - dev_priv->primary->offset : 0,
+ (unsigned long)(tail->age.head - dev_priv->primary->offset) : 0,
tail->age.wrap);
DRM_DEBUG(" head=0x%06lx %d\n",
- head - dev_priv->primary->offset, wrap);
+ (unsigned long)(head - dev_priv->primary->offset), wrap);
if (TEST_AGE(&tail->age, head, wrap)) {
prev = dev_priv->tail->prev;
@@ -366,8 +366,9 @@ int mga_freelist_put(struct drm_device *
drm_mga_freelist_t *head, *entry, *prev;
DRM_DEBUG("age=0x%06lx wrap=%d\n",
- buf_priv->list_entry->age.head -
- dev_priv->primary->offset, buf_priv->list_entry->age.wrap);
+ (unsigned long)(buf_priv->list_entry->age.head -
+ dev_priv->primary->offset),
+ buf_priv->list_entry->age.wrap);
entry = buf_priv->list_entry;
head = dev_priv->head;
Index: linux-work/drivers/gpu/drm/mga/mga_drv.h
===================================================================
--- linux-work.orig/drivers/gpu/drm/mga/mga_drv.h 2009-02-02 16:29:54.000000000 +1100
+++ linux-work/drivers/gpu/drm/mga/mga_drv.h 2009-02-02 16:29:54.000000000 +1100
@@ -317,8 +317,8 @@ do { \
DRM_INFO( "\n" ); \
DRM_INFO( " tail=0x%06x head=0x%06lx\n", \
dev_priv->prim.tail, \
- MGA_READ( MGA_PRIMADDRESS ) - \
- dev_priv->primary->offset ); \
+ (unsigned long)(MGA_READ(MGA_PRIMADDRESS) - \
+ dev_priv->primary->offset)); \
} \
if ( !test_bit( 0, &dev_priv->prim.wrapped ) ) { \
if ( dev_priv->prim.space < \
Index: linux-work/drivers/gpu/drm/r128/r128_cce.c
===================================================================
--- linux-work.orig/drivers/gpu/drm/r128/r128_cce.c 2009-02-02 16:29:50.000000000 +1100
+++ linux-work/drivers/gpu/drm/r128/r128_cce.c 2009-02-02 16:29:54.000000000 +1100
@@ -525,11 +525,12 @@ static int r128_do_init_cce(struct drm_d
} else
#endif
{
- dev_priv->cce_ring->handle = (void *)dev_priv->cce_ring->offset;
+ dev_priv->cce_ring->handle =
+ (void *)(unsigned long)dev_priv->cce_ring->offset;
dev_priv->ring_rptr->handle =
- (void *)dev_priv->ring_rptr->offset;
+ (void *)(unsigned long)dev_priv->ring_rptr->offset;
dev->agp_buffer_map->handle =
- (void *)dev->agp_buffer_map->offset;
+ (void *)(unsigned long)dev->agp_buffer_map->offset;
}
#if __OS_HAS_AGP
Index: linux-work/drivers/gpu/drm/radeon/radeon_cp.c
===================================================================
--- linux-work.orig/drivers/gpu/drm/radeon/radeon_cp.c 2009-02-02 16:29:50.000000000 +1100
+++ linux-work/drivers/gpu/drm/radeon/radeon_cp.c 2009-02-02 16:29:54.000000000 +1100
@@ -1052,11 +1052,12 @@ static int radeon_do_init_cp(struct drm_
} else
#endif
{
- dev_priv->cp_ring->handle = (void *)dev_priv->cp_ring->offset;
+ dev_priv->cp_ring->handle =
+ (void *)(unsigned long)dev_priv->cp_ring->offset;
dev_priv->ring_rptr->handle =
- (void *)dev_priv->ring_rptr->offset;
+ (void *)(unsigned long)dev_priv->ring_rptr->offset;
dev->agp_buffer_map->handle =
- (void *)dev->agp_buffer_map->offset;
+ (void *)(unsigned long)dev->agp_buffer_map->offset;
DRM_DEBUG("dev_priv->cp_ring->handle %p\n",
dev_priv->cp_ring->handle);
@@ -1167,7 +1168,7 @@ static int radeon_do_init_cp(struct drm_
/* if we have an offset set from userspace */
if (dev_priv->pcigart_offset_set) {
dev_priv->gart_info.bus_addr =
- dev_priv->pcigart_offset + dev_priv->fb_location;
+ (resource_size_t)dev_priv->pcigart_offset + dev_priv->fb_location;
dev_priv->gart_info.mapping.offset =
dev_priv->pcigart_offset + dev_priv->fb_aper_offset;
dev_priv->gart_info.mapping.size =
Index: linux-work/include/drm/drmP.h
===================================================================
--- linux-work.orig/include/drm/drmP.h 2009-02-02 16:29:54.000000000 +1100
+++ linux-work/include/drm/drmP.h 2009-02-02 16:29:54.000000000 +1100
@@ -526,7 +526,7 @@ struct drm_mm {
* Kernel side of a mapping
*/
struct drm_local_map {
- unsigned long offset; /**< Requested physical address (0 for SAREA)*/
+ resource_size_t offset; /**< Requested physical address (0 for SAREA)*/
unsigned long size; /**< Requested physical size (bytes) */
enum drm_map_type type; /**< Type of memory to map */
enum drm_map_flags flags; /**< Flags */
@@ -760,8 +760,8 @@ struct drm_driver {
struct drm_file *file_priv);
void (*reclaim_buffers_idlelocked) (struct drm_device *dev,
struct drm_file *file_priv);
- unsigned long (*get_map_ofs) (struct drm_local_map * map);
- unsigned long (*get_reg_ofs) (struct drm_device *dev);
+ resource_size_t (*get_map_ofs) (struct drm_local_map * map);
+ resource_size_t (*get_reg_ofs) (struct drm_device *dev);
void (*set_version) (struct drm_device *dev,
struct drm_set_version *sv);
@@ -1062,8 +1062,8 @@ extern int drm_release(struct inode *ino
extern int drm_mmap(struct file *filp, struct vm_area_struct *vma);
extern int drm_mmap_locked(struct file *filp, struct vm_area_struct *vma);
extern void drm_vm_open_locked(struct vm_area_struct *vma);
-extern unsigned long drm_core_get_map_ofs(struct drm_local_map * map);
-extern unsigned long drm_core_get_reg_ofs(struct drm_device *dev);
+extern resource_size_t drm_core_get_map_ofs(struct drm_local_map * map);
+extern resource_size_t drm_core_get_reg_ofs(struct drm_device *dev);
extern unsigned int drm_poll(struct file *filp, struct poll_table_struct *wait);
/* Memory management support (drm_memory.h) */
@@ -1166,7 +1166,7 @@ extern int drm_i_have_hw_lock(struct drm
/* Buffer management support (drm_bufs.h) */
extern int drm_addbufs_agp(struct drm_device *dev, struct drm_buf_desc * request);
extern int drm_addbufs_pci(struct drm_device *dev, struct drm_buf_desc * request);
-extern int drm_addmap(struct drm_device *dev, unsigned int offset,
+extern int drm_addmap(struct drm_device *dev, resource_size_t offset,
unsigned int size, enum drm_map_type type,
enum drm_map_flags flags, struct drm_local_map **map_ptr);
extern int drm_addmap_ioctl(struct drm_device *dev, void *data,
More information about the Linuxppc-dev
mailing list