Sync with Linus 2.4.9-pre2 + make all nopage routines more alike

5 files changed, 47 insertions, 36 deletions

diff --git a/linux-core/ati_pcigart.c b/linux-core/ati_pcigart.c
index 99d17ee7..a794b3e0 100644
--- a/linux-core/ati_pcigart.c
+++ b/linux-core/ati_pcigart.c
@@ -133,9 +133,9 @@ int DRM(ati_pcigart_init)( drm_device_t *dev,
 #if defined(__alpha__) && (LINUX_VERSION_CODE >= 0x020400)
 		/* we need to support large memory configurations */
 		entry->busaddr[i] = pci_map_single(dev->pdev,
-						   entry->pagelist[i]->virtual,
-						   PAGE_SIZE,
-						   PCI_DMA_TODEVICE);
+					   page_address( entry->pagelist[i] ),
+					   PAGE_SIZE,
+					   PCI_DMA_TODEVICE);
 		if (entry->busaddr[i] == 0) {
 			DRM_ERROR( "unable to map PCIGART pages!\n" );
 			DRM(ati_pcigart_cleanup)( dev, address, bus_address );
@@ -145,7 +145,7 @@ int DRM(ati_pcigart_init)( drm_device_t *dev,
 		}
 		page_base = (u32) entry->busaddr[i];
 #else
-		page_base = virt_to_bus( entry->pagelist[i]->virtual );
+		page_base = page_to_bus( entry->pagelist[i] );
 #endif
 		for (j = 0; j < (PAGE_SIZE / ATI_PCIGART_PAGE_SIZE); j++) {
 			*pci_gart++ = cpu_to_le32( page_base );
diff --git a/linux-core/drmP.h b/linux-core/drmP.h
index 8e2ecd16..f0a7ebf4 100644
--- a/linux-core/drmP.h
+++ b/linux-core/drmP.h
@@ -76,6 +76,11 @@
 #include <asm/pgalloc.h>
 #include "drm.h"
 
+/* page_to_bus for earlier kernels, not optimal in all cases */
+#ifndef page_to_bus
+#define page_to_bus(page)	(virt_to_bus(page_address(page)))
+#endif
+
 /* DRM template customization defaults
  */
 #ifndef __HAVE_AGP
diff --git a/linux-core/drm_context.c b/linux-core/drm_context.c
index 5e54d81a..eb4d61c8 100644
--- a/linux-core/drm_context.c
+++ b/linux-core/drm_context.c
@@ -160,7 +160,7 @@ int DRM(getsareactx)(struct inode *inode, struct file *filp,
 		return -EFAULT;
 
 	down(&dev->struct_sem);
-	if ((int)request.ctx_id >= dev->max_context) {
+	if (dev->max_context < 0 || request.ctx_id >= (unsigned) dev->max_context) {
 		up(&dev->struct_sem);
 		return -EINVAL;
 	}
@@ -193,22 +193,20 @@ int DRM(setsareactx)(struct inode *inode, struct file *filp,
 	list_for_each(list, &dev->maplist->head) {
 		r_list = (drm_map_list_t *)list;
 		if(r_list->map &&
-		   r_list->map->handle == request.handle) break;
+		   r_list->map->handle == request.handle)
+			goto found;
 	}
-	if (list == &(dev->maplist->head)) {
-		up(&dev->struct_sem);
-		return -EINVAL;
-	}
-	map = r_list->map;
+bad:
 	up(&dev->struct_sem);
+	return -EINVAL;
 
-	if (!map) return -EINVAL;
-
-	down(&dev->struct_sem);
-	if ((int)request.ctx_id >= dev->max_context) {
-		up(&dev->struct_sem);
-		return -EINVAL;
-	}
+found:
+	map = r_list->map;
+	if (!map) goto bad;
+	if (dev->max_context < 0)
+		goto bad;
+	if (request.ctx_id >= (unsigned) dev->max_context)
+		goto bad;
 	dev->context_sareas[request.ctx_id] = map;
 	up(&dev->struct_sem);
 	return 0;
diff --git a/linux-core/drm_scatter.c b/linux-core/drm_scatter.c
index 5654c8cb..66d34968 100644
--- a/linux-core/drm_scatter.c
+++ b/linux-core/drm_scatter.c
@@ -179,7 +179,7 @@ int DRM(sg_alloc)( struct inode *inode, struct file *filp,
 	for ( i = 0 ; i < pages ; i++ ) {
 		unsigned long *tmp;
 
-		tmp = (unsigned long *)entry->pagelist[i]->virtual;
+		tmp = page_address( entry->pagelist[i] );
 		for ( j = 0 ;
 		      j < PAGE_SIZE / sizeof(unsigned long) ;
 		      j++, tmp++ ) {
@@ -197,7 +197,7 @@ int DRM(sg_alloc)( struct inode *inode, struct file *filp,
 					   "virtual mapping\n" );
 			}
 		}
-		tmp = (unsigned long *)entry->pagelist[i]->virtual;
+		tmp = page_address( entry->pagelist[i] );
 		for(j = 0 ;
 		    j < PAGE_SIZE / sizeof(unsigned long) ;
 		    j++, tmp++) {
diff --git a/linux-core/drm_vm.c b/linux-core/drm_vm.c
index 2a5ee146..8119a21b 100644
--- a/linux-core/drm_vm.c
+++ b/linux-core/drm_vm.c
@@ -122,7 +122,11 @@ DRM_ERROR("baddr = 0x%lx page = 0x%lx, offset = 0x%lx\n",
           baddr, __va(agpmem->memory->memory[offset]), offset);
 #endif
                 get_page(page);
+#if LINUX_VERSION_CODE < 0x020317
+                return page_address(page);
+#else
                 return page;
+#endif
         }
 #endif
 	return NOPAGE_SIGBUS;		/* Disallow mremap */
@@ -144,12 +148,12 @@ struct page *DRM(vm_shm_nopage)(struct vm_area_struct *vma,
 #else
 	drm_map_t	 *map	 = (drm_map_t *)vma->vm_pte;
 #endif
-	unsigned long	 physical;
 	unsigned long	 offset;
 	unsigned long	 i;
 	pgd_t		 *pgd;
 	pmd_t		 *pmd;
 	pte_t		 *pte;
+	struct page	 *page;
 
 	if (address > vma->vm_end) return NOPAGE_SIGBUS; /* Disallow mremap */
 	if (!map)    		   return NOPAGE_OOM;  /* Nothing allocated */
@@ -165,14 +169,15 @@ struct page *DRM(vm_shm_nopage)(struct vm_area_struct *vma,
 	if( !pmd_present( *pmd ) ) return NOPAGE_OOM;
 	pte = pte_offset( pmd, i );
 	if( !pte_present( *pte ) ) return NOPAGE_OOM;
-	physical = (unsigned long)pte_page( *pte )->virtual;
-	atomic_inc(&virt_to_page(physical)->count); /* Dec. by kernel */
 
-	DRM_DEBUG("0x%08lx => 0x%08lx\n", address, physical);
+	page = pte_page( *pte );
+	get_page(page);
+
+	DRM_DEBUG("0x%08lx => 0x%08lx\n", address, page_to_bus(page));
 #if LINUX_VERSION_CODE < 0x020317
-	return physical;
+	return page_address(page);
 #else
-	return virt_to_page(physical);
+	return page;
 #endif
 }
 
@@ -277,24 +282,27 @@ struct page *DRM(vm_dma_nopage)(struct vm_area_struct *vma,
 	drm_file_t	 *priv	 = vma->vm_file->private_data;
 	drm_device_t	 *dev	 = priv->dev;
 	drm_device_dma_t *dma	 = dev->dma;
-	unsigned long	 physical;
 	unsigned long	 offset;
-	unsigned long	 page;
+	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	 = offset >> PAGE_SHIFT;
-	physical = dma->pagelist[page] + (offset & (~PAGE_MASK));
-	atomic_inc(&virt_to_page(physical)->count); /* Dec. by kernel */
+	page_nr  = offset >> PAGE_SHIFT;
+	page = virt_to_page((dma->pagelist[page_nr] + 
+			     (offset & (~PAGE_MASK))));
+
+	get_page(page);
 
-	DRM_DEBUG("0x%08lx (page %lu) => 0x%08lx\n", address, page, physical);
+	DRM_DEBUG("0x%08lx (page %lu) => 0x%08lx\n", address, page_nr, 
+		  page_to_bus(page));
 #if LINUX_VERSION_CODE < 0x020317
-	return physical;
+	return page_address(page);
 #else
-	return virt_to_page(physical);
+	return page;
 #endif
 }
 
@@ -331,10 +339,10 @@ struct page *DRM(vm_sg_nopage)(struct vm_area_struct *vma,
 	map_offset = map->offset - dev->sg->handle;
 	page_offset = (offset >> PAGE_SHIFT) + (map_offset >> PAGE_SHIFT);
 	page = entry->pagelist[page_offset];
-	atomic_inc(&page->count);                       /* Dec. by kernel */
+	get_page(page);
 
 #if LINUX_VERSION_CODE < 0x020317
-	return (unsigned long)virt_to_phys(page->virtual);
+	return page_address(page);
 #else
 	return page;
 #endif