/** * \file drm_compat.h * Backward compatability definitions for Direct Rendering Manager * * \author Rickard E. (Rik) Faith * \author Gareth Hughes */ /* * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas. * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. * All rights reserved. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice (including the next * paragraph) shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR * OTHER DEALINGS IN THE SOFTWARE. */ #ifndef _DRM_COMPAT_H_ #define _DRM_COMPAT_H_ #ifndef minor #define minor(x) MINOR((x)) #endif #ifndef MODULE_LICENSE #define MODULE_LICENSE(x) #endif #ifndef preempt_disable #define preempt_disable() #define preempt_enable() #endif #ifndef pte_offset_map #define pte_offset_map pte_offset #define pte_unmap(pte) #endif #ifndef module_param #define module_param(name, type, perm) #endif /* older kernels had different irq args */ #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19)) #undef DRM_IRQ_ARGS #define DRM_IRQ_ARGS int irq, void *arg, struct pt_regs *regs typedef _Bool bool; enum { false = 0, true = 1 }; #endif #ifndef list_for_each_safe #define list_for_each_safe(pos, n, head) \ for (pos = (head)->next, n = pos->next; pos != (head); \ pos = n, n = pos->next) #endif #ifndef list_for_each_entry #define list_for_each_entry(pos, head, member) \ for (pos = list_entry((head)->next, typeof(*pos), member), \ prefetch(pos->member.next); \ &pos->member != (head); \ pos = list_entry(pos->member.next, typeof(*pos), member), \ prefetch(pos->member.next)) #endif #ifndef list_for_each_entry_safe #define list_for_each_entry_safe(pos, n, head, member) \ for (pos = list_entry((head)->next, typeof(*pos), member), \ n = list_entry(pos->member.next, typeof(*pos), member); \ &pos->member != (head); \ pos = n, n = list_entry(n->member.next, typeof(*n), member)) #endif #ifndef __user #define __user #endif #if !defined(__put_page) #define __put_page(p) atomic_dec(&(p)->count) #endif #if !defined(__GFP_COMP) #define __GFP_COMP 0 #endif #if !defined(IRQF_SHARED) #define IRQF_SHARED SA_SHIRQ #endif #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,10) static inline int remap_pfn_range(struct vm_area_struct *vma, unsigned long from, unsigned long pfn, unsigned long size, pgprot_t pgprot) { return remap_page_range(vma, from, pfn << PAGE_SHIFT, size, pgprot); } static __inline__ void *kcalloc(size_t nmemb, size_t size, int flags) { void *addr; addr = kmalloc(size * nmemb, flags); if (addr != NULL) memset((void *)addr, 0, size * nmemb); return addr; } #endif #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,16) #define mutex_lock down #define mutex_unlock up #define mutex semaphore #define mutex_init(a) sema_init((a), 1) #endif #ifndef DEFINE_SPINLOCK #define DEFINE_SPINLOCK(x) spinlock_t x = SPIN_LOCK_UNLOCKED #endif /* old architectures */ #ifdef __AMD64__ #define __x86_64__ #endif /* sysfs __ATTR macro */ #ifndef __ATTR #define __ATTR(_name,_mode,_show,_store) { \ .attr = {.name = __stringify(_name), .mode = _mode, .owner = THIS_MODULE }, \ .show = _show, \ .store = _store, \ } #endif #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18) #define vmalloc_user(_size) ({void * tmp = vmalloc(_size); \ if (tmp) memset(tmp, 0, _size); \ (tmp);}) #endif #ifndef list_for_each_entry_safe_reverse #define list_for_each_entry_safe_reverse(pos, n, head, member) \ for (pos = list_entry((head)->prev, typeof(*pos), member), \ n = list_entry(pos->member.prev, typeof(*pos), member); \ &pos->member != (head); \ pos = n, n = list_entry(n->member.prev, typeof(*n), member)) #endif #include #include #if ((LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19)) && \ (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,15))) #define DRM_ODD_MM_COMPAT #endif #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,21)) #define DRM_FULL_MM_COMPAT #endif /* * Flush relevant caches and clear a VMA structure so that page references * will cause a page fault. Don't flush tlbs. */ extern void drm_clear_vma(struct vm_area_struct *vma, unsigned long addr, unsigned long end); /* * Return the PTE protection map entries for the VMA flags given by * flags. This is a functional interface to the kernel's protection map. */ extern pgprot_t vm_get_page_prot(unsigned long vm_flags); #ifndef GFP_DMA32 #define GFP_DMA32 GFP_KERNEL #endif #ifndef __GFP_DMA32 #define __GFP_DMA32 GFP_KERNEL #endif #if defined(CONFIG_X86) && (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,15)) /* * These are too slow in earlier kernels. */ extern int drm_unmap_page_from_agp(struct page *page); extern int drm_map_page_into_agp(struct page *page); #define map_page_into_agp drm_map_page_into_agp #define unmap_page_from_agp drm_unmap_page_from_agp #endif #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,15)) extern struct page *get_nopage_retry(void); extern void free_nopage_retry(void); #define NOPAGE_REFAULT get_nopage_retry() #endif #ifndef DRM_FULL_MM_COMPAT /* * For now, just return a dummy page that we've allocated out of * static space. The page will be put by do_nopage() since we've already * filled out the pte. */ struct fault_data { struct vm_area_struct *vma; unsigned long address; pgoff_t pgoff; unsigned int flags; int type; }; #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19)) extern struct page *drm_bo_vm_nopage(struct vm_area_struct *vma, unsigned long address, int *type); #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,19)) && \ !defined(DRM_FULL_MM_COMPAT) extern unsigned long drm_bo_vm_nopfn(struct vm_area_struct *vma, unsigned long address); #endif /* (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19)) */ #endif /* ndef DRM_FULL_MM_COMPAT */ #ifdef DRM_ODD_MM_COMPAT struct drm_buffer_object; /* * Add a vma to the ttm vma list, and the * process mm pointer to the ttm mm list. Needs the ttm mutex. */ extern int drm_bo_add_vma(struct drm_buffer_object * bo, struct vm_area_struct *vma); /* * Delete a vma and the corresponding mm pointer from the * ttm lists. Needs the ttm mutex. */ extern void drm_bo_delete_vma(struct drm_buffer_object * bo, struct vm_area_struct *vma); /* * Attempts to lock all relevant mmap_sems for a ttm, while * not releasing the ttm mutex. May return -EAGAIN to avoid * deadlocks. In that case the caller shall release the ttm mutex, * schedule() and try again. */ extern int drm_bo_lock_kmm(struct drm_buffer_object * bo); /* * Unlock all relevant mmap_sems for a ttm. */ extern void drm_bo_unlock_kmm(struct drm_buffer_object * bo); /* * If the ttm was bound to the aperture, this function shall be called * with all relevant mmap sems held. It deletes the flag VM_PFNMAP from all * vmas mapping this ttm. This is needed just after unmapping the ptes of * the vma, otherwise the do_nopage() function will bug :(. The function * releases the mmap_sems for this ttm. */ extern void drm_bo_finish_unmap(struct drm_buffer_object *bo); /* * Remap all vmas of this ttm using io_remap_pfn_range. We cannot * fault these pfns in, because the first one will set the vma VM_PFNMAP * flag, which will make the next fault bug in do_nopage(). The function * releases the mmap_sems for this ttm. */ extern int drm_bo_remap_bound(struct drm_buffer_object *bo); /* * Remap a vma for a bound ttm. Call with the ttm mutex held and * the relevant mmap_sem locked. */ extern int drm_bo_map_bound(struct vm_area_struct *vma); #endif /* fixme when functions are upstreamed - upstreamed for 2.6.23 */ #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,23)) #define DRM_IDR_COMPAT_FN #endif #ifdef DRM_IDR_COMPAT_FN int idr_for_each(struct idr *idp, int (*fn)(int id, void *p, void *data), void *data); void idr_remove_all(struct idr *idp); #endif #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18)) void *idr_replace(struct idr *idp, void *ptr, int id); #endif #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19)) extern unsigned long round_jiffies_relative(unsigned long j); #endif #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19)) extern struct pci_dev * pci_get_bus_and_slot(unsigned int bus, unsigned int devfn); #endif #endif