Fix for multiple sarea bug + agp built into kernel segfault

3 files changed, 89 insertions, 16 deletions

diff --git a/linux/agpsupport.c b/linux/agpsupport.c
index 48a6aa5f..7ed234e1 100644
--- a/linux/agpsupport.c
+++ b/linux/agpsupport.c
@@ -287,23 +287,40 @@ drm_agp_head_t *drm_agp_init(void)
 			return NULL;
 		memset((void *)head, 0, sizeof(*head));
 		(*drm_agp.copy_info)(&head->agp_info);
+		if (head->agp_info.chipset == NOT_SUPPORTED) {
+			drm_free(head, sizeof(*head), DRM_MEM_AGPLISTS);
+			return NULL;
+		}
 		head->memory = NULL;
 		switch (head->agp_info.chipset) {
-		case INTEL_GENERIC:  head->chipset = "Intel";          break;
-		case INTEL_LX:       head->chipset = "Intel 440LX";    break;
-		case INTEL_BX:       head->chipset = "Intel 440BX";    break;
-		case INTEL_GX:       head->chipset = "Intel 440GX";    break;
-		case INTEL_I810:     head->chipset = "Intel i810";     break;
-		case VIA_GENERIC:    head->chipset = "VIA";            break;
-		case VIA_VP3:        head->chipset = "VIA VP3";        break;
-		case VIA_MVP3:       head->chipset = "VIA MVP3";       break;
-		case VIA_APOLLO_PRO: head->chipset = "VIA Apollo Pro"; break;
-		case SIS_GENERIC:    head->chipset = "SiS";            break;
-		case AMD_GENERIC:    head->chipset = "AMD";            break;
-		case AMD_IRONGATE:   head->chipset = "AMD Irongate";   break;
-		case ALI_GENERIC:    head->chipset = "ALi";            break;
-		case ALI_M1541:      head->chipset = "ALi M1541";      break;
-		default:
+		case INTEL_GENERIC:	head->chipset = "Intel";         break;
+		case INTEL_LX:		head->chipset = "Intel 440LX";   break;
+		case INTEL_BX:		head->chipset = "Intel 440BX";   break;
+		case INTEL_GX:		head->chipset = "Intel 440GX";   break;
+		case INTEL_I810:	head->chipset = "Intel i810";    break;
+
+#if LINUX_VERSION_CODE >= 0x020400
+		case INTEL_I840:	head->chipset = "Intel i840";    break;
+#endif
+
+		case VIA_GENERIC:	head->chipset = "VIA";           break;
+		case VIA_VP3:		head->chipset = "VIA VP3";       break;
+		case VIA_MVP3:		head->chipset = "VIA MVP3";      break;
+
+#if LINUX_VERSION_CODE >= 0x020400
+		case VIA_MVP4:		head->chipset = "VIA MVP4";      break;
+		case VIA_APOLLO_SUPER:	head->chipset = "VIA Apollo Super"; 
+			break;
+#endif
+
+		case VIA_APOLLO_PRO: 	head->chipset = "VIA Apollo Pro";
+			break;
+		case SIS_GENERIC:	head->chipset = "SiS";           break;
+		case AMD_GENERIC:	head->chipset = "AMD";           break;
+		case AMD_IRONGATE:	head->chipset = "AMD Irongate";  break;
+		case ALI_GENERIC:	head->chipset = "ALi";           break;
+		case ALI_M1541: 	head->chipset = "ALi M1541";     break;
+		default:		head->chipset = "Unknown";       break;
 		}
 		DRM_INFO("AGP %d.%d on %s @ 0x%08lx %dMB\n",
 			 head->agp_info.version.major,
diff --git a/linux/drmP.h b/linux/drmP.h
index 3e5149c9..516e9b22 100644
--- a/linux/drmP.h
+++ b/linux/drmP.h
@@ -558,6 +558,9 @@ extern unsigned long drm_vm_nopage(struct vm_area_struct *vma,
 extern unsigned long drm_vm_shm_nopage(struct vm_area_struct *vma,
 				       unsigned long address,
 				       int write_access);
+extern unsigned long drm_vm_shm_nopage_lock(struct vm_area_struct *vma,
+					    unsigned long address,
+					    int write_access);
 extern unsigned long drm_vm_dma_nopage(struct vm_area_struct *vma,
 				       unsigned long address,
 				       int write_access);
@@ -569,6 +572,9 @@ extern struct page *drm_vm_nopage(struct vm_area_struct *vma,
 extern struct page *drm_vm_shm_nopage(struct vm_area_struct *vma,
 				      unsigned long address,
 				      int write_access);
+extern struct page *drm_vm_shm_nopage_lock(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);
diff --git a/linux/vm.c b/linux/vm.c
index 5ee9e324..b1f0d49a 100644
--- a/linux/vm.c
+++ b/linux/vm.c
@@ -44,6 +44,12 @@ struct vm_operations_struct   drm_vm_shm_ops = {
 	close:	 drm_vm_close,
 };
 
+struct vm_operations_struct   drm_vm_shm_lock_ops = {
+	nopage:	 drm_vm_shm_nopage_lock,
+	open:	 drm_vm_open,
+	close:	 drm_vm_close,
+};
+
 struct vm_operations_struct   drm_vm_dma_ops = {
 	nopage:	 drm_vm_dma_nopage,
 	open:	 drm_vm_open,
@@ -77,6 +83,40 @@ struct page *drm_vm_shm_nopage(struct vm_area_struct *vma,
 			       int write_access)
 #endif
 {
+#if LINUX_VERSION_CODE >= 0x020300
+	drm_map_t	 *map	 = (drm_map_t *)vma->vm_private_data;
+#else
+	drm_map_t	 *map	 = (drm_map_t *)vma->vm_pte;
+#endif
+	unsigned long	 physical;
+	unsigned long	 offset;
+
+	if (address > vma->vm_end) return NOPAGE_SIGBUS; /* Disallow mremap */
+	if (!map)    		   return NOPAGE_OOM;  /* Nothing allocated */
+
+	offset	 = address - vma->vm_start;
+	physical = (unsigned long)map->handle + offset;
+	atomic_inc(&mem_map[MAP_NR(physical)].count); /* Dec. by kernel */
+
+	DRM_DEBUG("0x%08lx => 0x%08lx\n", address, physical);
+#if LINUX_VERSION_CODE < 0x020317
+	return physical;
+#else
+	return mem_map + MAP_NR(physical);
+#endif
+}
+
+#if LINUX_VERSION_CODE < 0x020317
+unsigned long drm_vm_shm_nopage_lock(struct vm_area_struct *vma,
+				     unsigned long address,
+				     int write_access)
+#else
+				/* Return type changed in 2.3.23 */
+struct page *drm_vm_shm_nopage_lock(struct vm_area_struct *vma,
+				    unsigned long address,
+				    int write_access)
+#endif
+{
 	drm_file_t	 *priv	 = vma->vm_file->private_data;
 	drm_device_t	 *dev	 = priv->dev;
 	unsigned long	 physical;
@@ -298,7 +338,17 @@ int drm_mmap(struct file *filp, struct vm_area_struct *vma)
 		vma->vm_ops = &drm_vm_ops;
 		break;
 	case _DRM_SHM:
-		vma->vm_ops = &drm_vm_shm_ops;
+		if (map->flags & _DRM_CONTAINS_LOCK)
+			vma->vm_ops = &drm_vm_shm_lock_ops;
+		else {
+			vma->vm_ops = &drm_vm_shm_ops;
+#if LINUX_VERSION_CODE >= 0x020300
+			vma->vm_private_data = (void *)map;
+#else
+			vma->vm_pte = (unsigned long)map;
+#endif
+		}
+
 				/* Don't let this area swap.  Change when
 				   DRM_KERNEL advisory is supported. */
 		vma->vm_flags |= VM_LOCKED;