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SubjectRe: [Dri-devel] 2.6 kernel change in nopage
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On Wed, 2003-12-31 at 19:21, Jon Smirl wrote:
> The headers for nopageXX calls just changed.
>
> struct page * (*nopage)(struct vm_area_struct * area, unsigned long address, int
> unused);
> changed to:
> struct page * (*nopage)(struct vm_area_struct * area, unsigned long address, int
> *type);
>
> The DRM drivers need to be adjusted. This probably impacts the BSD builds.

No, this is Linux specific.

How does this patch look?


--
Earthling Michel Dänzer | Debian (powerpc), X and DRI developer
Software libre enthusiast | http://svcs.affero.net/rm.php?r=daenzerIndex: drmP.h
===================================================================
RCS file: /cvs/dri/xc/xc/programs/Xserver/hw/xfree86/os-support/linux/drm/kernel/drmP.h,v
retrieving revision 1.85
diff -p -u -r1.85 drmP.h
--- drmP.h 5 Nov 2003 08:13:52 -0000 1.85
+++ drmP.h 1 Jan 2004 12:02:05 -0000
@@ -806,18 +819,10 @@ extern int DRM(flush)(struct file *
extern int DRM(fasync)(int fd, struct file *filp, int on);

/* Mapping support (drm_vm.h) */
-extern struct page *DRM(vm_nopage)(struct vm_area_struct *vma,
- unsigned long address,
- int write_access);
-extern struct page *DRM(vm_shm_nopage)(struct vm_area_struct *vma,
- unsigned long address,
- int write_access);
-extern struct page *DRM(vm_dma_nopage)(struct vm_area_struct *vma,
- unsigned long address,
- int write_access);
-extern struct page *DRM(vm_sg_nopage)(struct vm_area_struct *vma,
- unsigned long address,
- int write_access);
+extern struct page *DRM(vm_nopage)( DRM_NOPAGE_ARGS );
+extern struct page *DRM(vm_shm_nopage)( DRM_NOPAGE_ARGS );
+extern struct page *DRM(vm_dma_nopage)( DRM_NOPAGE_ARGS );
+extern struct page *DRM(vm_sg_nopage)( DRM_NOPAGE_ARGS );
extern void DRM(vm_open)(struct vm_area_struct *vma);
extern void DRM(vm_close)(struct vm_area_struct *vma);
extern void DRM(vm_shm_close)(struct vm_area_struct *vma);
Index: drm_os_linux.h
===================================================================
RCS file: /cvs/dri/xc/xc/programs/Xserver/hw/xfree86/os-support/linux/drm/kernel/drm_os_linux.h,v
retrieving revision 1.19
diff -p -u -r1.19 drm_os_linux.h
--- drm_os_linux.h 4 Nov 2003 00:46:05 -0000 1.19
+++ drm_os_linux.h 1 Jan 2004 12:02:05 -0000
@@ -52,6 +52,13 @@ typedef void irqreturn_t;
#define DRM_AGP_KERN struct agp_kern_info
#endif

+/** Page fault handler arguments */
+#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,0)
+#define DRM_NOPAGE_ARGS struct vm_area_struct *vma, unsigned long address, int *type
+#else
+#define DRM_NOPAGE_ARGS struct vm_area_struct *vma, unsigned long address, int unused
+#endif
+
/** Task queue handler arguments */
#define DRM_TASKQUEUE_ARGS void *arg

Index: drm_vm.h
===================================================================
RCS file: /cvs/dri/xc/xc/programs/Xserver/hw/xfree86/os-support/linux/drm/kernel/drm_vm.h,v
retrieving revision 1.26
diff -p -u -r1.26 drm_vm.h
--- drm_vm.h 12 Sep 2003 20:00:59 -0000 1.26
+++ drm_vm.h 1 Jan 2004 12:02:05 -0000
@@ -69,15 +69,14 @@ struct vm_operations_struct DRM(vm_sg_
*
* \param vma virtual memory area.
* \param address access address.
- * \param write_access sharing.
+ * \param type pointer to variable holding the type of fault
+ * (unused before kernel 2.6.1).
* \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.
*/
-struct page *DRM(vm_nopage)(struct vm_area_struct *vma,
- unsigned long address,
- int write_access)
+struct page *DRM(vm_nopage)( DRM_NOPAGE_ARGS )
{
#if __REALLY_HAVE_AGP
drm_file_t *priv = vma->vm_file->private_data;
@@ -134,6 +133,10 @@ struct page *DRM(vm_nopage)(struct vm_ar
baddr, __va(agpmem->memory->memory[offset]), offset,
atomic_read(&page->count));

+#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,0)
+ if (type)
+ *type = VM_FAULT_MINOR;
+#endif
return page;
}
vm_nopage_error:
@@ -147,15 +150,14 @@ vm_nopage_error:
*
* \param vma virtual memory area.
* \param address access address.
- * \param write_access sharing.
+ * \param type pointer to variable holding the type of fault
+ * (unused before kernel 2.6.1).
* \return pointer to the page structure.
*
* Get the the mapping, find the real physical page to map, get the page, and
* return it.
*/
-struct page *DRM(vm_shm_nopage)(struct vm_area_struct *vma,
- unsigned long address,
- int write_access)
+struct page *DRM(vm_shm_nopage)( DRM_NOPAGE_ARGS )
{
drm_map_t *map = (drm_map_t *)vma->vm_private_data;
unsigned long offset;
@@ -171,6 +173,10 @@ struct page *DRM(vm_shm_nopage)(struct v
if (!page)
return NOPAGE_OOM;
get_page(page);
+#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,0)
+ if (type)
+ *type = VM_FAULT_MINOR;
+#endif

DRM_DEBUG("shm_nopage 0x%lx\n", address);
return page;
@@ -262,14 +268,13 @@ void DRM(vm_shm_close)(struct vm_area_st
*
* \param vma virtual memory area.
* \param address access address.
- * \param write_access sharing.
+ * \param type pointer to variable holding the type of fault
+ * (unused before kernel 2.6.1).
* \return pointer to the page structure.
*
* Determine the page number from the page offset and get it from drm_device_dma::pagelist.
*/
-struct page *DRM(vm_dma_nopage)(struct vm_area_struct *vma,
- unsigned long address,
- int write_access)
+struct page *DRM(vm_dma_nopage)( DRM_NOPAGE_ARGS )
{
drm_file_t *priv = vma->vm_file->private_data;
drm_device_t *dev = priv->dev;
@@ -288,6 +293,10 @@ struct page *DRM(vm_dma_nopage)(struct v
(offset & (~PAGE_MASK))));

get_page(page);
+#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,0)
+ if (type)
+ *type = VM_FAULT_MINOR;
+#endif

DRM_DEBUG("dma_nopage 0x%lx (page %lu)\n", address, page_nr);
return page;
@@ -298,14 +307,13 @@ struct page *DRM(vm_dma_nopage)(struct v
*
* \param vma virtual memory area.
* \param address access address.
- * \param write_access sharing.
+ * \param type pointer to variable holding the type of fault
+ * (unused before kernel 2.6.1).
* \return pointer to the page structure.
*
* Determine the map offset from the page offset and get it from drm_sg_mem::pagelist.
*/
-struct page *DRM(vm_sg_nopage)(struct vm_area_struct *vma,
- unsigned long address,
- int write_access)
+struct page *DRM(vm_sg_nopage)( DRM_NOPAGE_ARGS )
{
drm_map_t *map = (drm_map_t *)vma->vm_private_data;
drm_file_t *priv = vma->vm_file->private_data;
@@ -326,6 +334,10 @@ struct page *DRM(vm_sg_nopage)(struct vm
page_offset = (offset >> PAGE_SHIFT) + (map_offset >> PAGE_SHIFT);
page = entry->pagelist[page_offset];
get_page(page);
+#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,0)
+ if (type)
+ *type = VM_FAULT_MINOR;
+#endif

return page;
}
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