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/**
* \file drm_compat.h
* Backward compatability definitions for Direct Rendering Manager
*
* \author Rickard E. (Rik) Faith <faith@valinux.com>
* \author Gareth Hughes <gareth@valinux.com>
*/
/*
* 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 <linux/mm.h>
#include <asm/page.h>
#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
#if (defined(CONFIG_X86) && defined(X86_FEATURE_PAT) && defined(X86_FEATURE_MSR))
/*
* Use the i386 Page Attribute Table for write-combining.
* We can't include this code in the kernel submission, since some of it
* belongs at kernel startup.
*/
#define USE_PAT_WC
#else
#undef USE_PAT_WC
#endif
#ifdef USE_PAT_WC
#ifndef MSR_IA32_CR_PAT
#define MSR_IA32_CR_PAT 0x0277
#endif
#ifndef _PAGE_PAT
#define _PAGE_PAT 0x080 /* Note that this is the same value as _PAGE_PROTNONE */
#endif
extern void drm_init_pat(void);
extern int drm_use_pat(void);
#endif
/* fixme when functions are upstreamed - upstreamed for 2.6.23 */
//#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,23))
#if ((LINUX_VERSION_CODE < KERNEL_VERSION(2,6,23)) && \
(LINUX_VERSION_CODE != KERNEL_VERSION(2,6,21)))
#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
#ifndef VM_CAN_NONLINEAR
#define DRM_VM_NOPAGE 1
#endif
#ifdef DRM_VM_NOPAGE
extern struct page *drm_vm_nopage(struct vm_area_struct *vma,
unsigned long address, int *type);
extern struct page *drm_vm_shm_nopage(struct vm_area_struct *vma,
unsigned long address, int *type);
extern struct page *drm_vm_dma_nopage(struct vm_area_struct *vma,
unsigned long address, int *type);
extern struct page *drm_vm_sg_nopage(struct vm_area_struct *vma,
unsigned long address, int *type);
#endif
#endif
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