376 lines
9.7 KiB
C
376 lines
9.7 KiB
C
/**
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* \file drm_compat.h
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* Backward compatability definitions for Direct Rendering Manager
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*
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* \author Rickard E. (Rik) Faith <faith@valinux.com>
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* \author Gareth Hughes <gareth@valinux.com>
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*/
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/*
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* Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
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* Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
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* All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <asm/agp.h>
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#ifndef _DRM_COMPAT_H_
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#define _DRM_COMPAT_H_
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#ifndef minor
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#define minor(x) MINOR((x))
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#endif
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#ifndef MODULE_LICENSE
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#define MODULE_LICENSE(x)
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#endif
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#ifndef preempt_disable
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#define preempt_disable()
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#define preempt_enable()
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#endif
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#ifndef pte_offset_map
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#define pte_offset_map pte_offset
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#define pte_unmap(pte)
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#endif
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#ifndef module_param
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#define module_param(name, type, perm)
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#endif
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#ifndef list_for_each_safe
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#define list_for_each_safe(pos, n, head) \
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for (pos = (head)->next, n = pos->next; pos != (head); \
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pos = n, n = pos->next)
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#endif
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#ifndef list_for_each_entry
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#define list_for_each_entry(pos, head, member) \
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for (pos = list_entry((head)->next, typeof(*pos), member), \
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prefetch(pos->member.next); \
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&pos->member != (head); \
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pos = list_entry(pos->member.next, typeof(*pos), member), \
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prefetch(pos->member.next))
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#endif
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#ifndef list_for_each_entry_safe
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#define list_for_each_entry_safe(pos, n, head, member) \
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for (pos = list_entry((head)->next, typeof(*pos), member), \
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n = list_entry(pos->member.next, typeof(*pos), member); \
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&pos->member != (head); \
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pos = n, n = list_entry(n->member.next, typeof(*n), member))
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#endif
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#if LINUX_VERSION_CODE < KERNEL_VERSION(2,4,19)
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static inline struct page *vmalloc_to_page(void *vmalloc_addr)
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{
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unsigned long addr = (unsigned long)vmalloc_addr;
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struct page *page = NULL;
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pgd_t *pgd = pgd_offset_k(addr);
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pmd_t *pmd;
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pte_t *ptep, pte;
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if (!pgd_none(*pgd)) {
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pmd = pmd_offset(pgd, addr);
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if (!pmd_none(*pmd)) {
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preempt_disable();
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ptep = pte_offset_map(pmd, addr);
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pte = *ptep;
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if (pte_present(pte))
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page = pte_page(pte);
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pte_unmap(ptep);
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preempt_enable();
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}
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}
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return page;
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}
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#endif
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#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,4,2)
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#define down_write down
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#define up_write up
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#endif
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
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#define DRM_PCI_DEV(pdev) &pdev->dev
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#else
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#define DRM_PCI_DEV(pdev) NULL
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#endif
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#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)
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static inline unsigned iminor(struct inode *inode)
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{
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return MINOR(inode->i_rdev);
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}
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#define old_encode_dev(x) (x)
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struct drm_sysfs_class;
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struct class_simple;
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struct device;
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#define pci_dev_put(x) do {} while (0)
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#define pci_get_subsys pci_find_subsys
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static inline struct class_device *DRM(sysfs_device_add) (struct drm_sysfs_class
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* cs, dev_t dev,
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struct device *
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device,
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const char *fmt,
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...) {
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return NULL;
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}
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static inline void DRM(sysfs_device_remove) (dev_t dev) {
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}
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static inline void DRM(sysfs_destroy) (struct drm_sysfs_class * cs) {
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}
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static inline struct drm_sysfs_class *DRM(sysfs_create) (struct module * owner,
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char *name) {
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return NULL;
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}
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#ifndef pci_pretty_name
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#define pci_pretty_name(x) x->name
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#endif
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struct drm_device;
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static inline int radeon_create_i2c_busses(struct drm_device *dev)
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{
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return 0;
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};
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static inline void radeon_delete_i2c_busses(struct drm_device *dev)
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{
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};
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#endif
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#ifndef __user
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#define __user
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#endif
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#if !defined(__put_page)
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#define __put_page(p) atomic_dec(&(p)->count)
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#endif
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#if !defined(__GFP_COMP)
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#define __GFP_COMP 0
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#endif
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#ifndef REMAP_PAGE_RANGE_5_ARGS
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#define DRM_RPR_ARG(vma)
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#else
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#define DRM_RPR_ARG(vma) vma,
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#endif
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#define VM_OFFSET(vma) ((vma)->vm_pgoff << PAGE_SHIFT)
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#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,10)
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static inline int remap_pfn_range(struct vm_area_struct *vma, unsigned long from, unsigned long pfn, unsigned long size, pgprot_t pgprot)
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{
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return remap_page_range(DRM_RPR_ARG(vma) from,
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pfn << PAGE_SHIFT,
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size,
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pgprot);
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}
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#endif
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#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,16)
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#define mutex_lock down
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#define mutex_unlock up
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#define mutex semaphore
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#define mutex_init(a) sema_init((a), 1)
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#endif
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#ifndef DEFINE_SPINLOCK
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#define DEFINE_SPINLOCK(x) spinlock_t x = SPIN_LOCK_UNLOCKED
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#endif
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/* old architectures */
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#ifdef __AMD64__
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#define __x86_64__
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#endif
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#ifndef pci_pretty_name
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#define pci_pretty_name(dev) ""
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#endif
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/* sysfs __ATTR macro */
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#ifndef __ATTR
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#define __ATTR(_name,_mode,_show,_store) { \
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.attr = {.name = __stringify(_name), .mode = _mode, .owner = THIS_MODULE }, \
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.show = _show, \
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.store = _store, \
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}
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#endif
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#include <linux/mm.h>
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#include <asm/page.h>
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#if ((LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19)) && \
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(LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,15)))
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#define DRM_ODD_MM_COMPAT
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#endif
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/*
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* Flush relevant caches and clear a VMA structure so that page references
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* will cause a page fault. Don't flush tlbs.
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*/
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extern void drm_clear_vma(struct vm_area_struct *vma,
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unsigned long addr, unsigned long end);
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/*
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* Return the PTE protection map entries for the VMA flags given by
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* flags. This is a functional interface to the kernel's protection map.
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*/
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extern pgprot_t vm_get_page_prot(unsigned long vm_flags);
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/*
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* These are similar to the current kernel gatt pages allocator, only that we
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* want a struct page pointer instead of a virtual address. This allows for pages
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* that are not in the kernel linear map.
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*/
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#define drm_alloc_gatt_pages(order) ({ \
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void *_virt = alloc_gatt_pages(order); \
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((_virt) ? virt_to_page(_virt) : NULL);})
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#define drm_free_gatt_pages(pages, order) free_gatt_pages(page_address(pages), order)
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#if defined(CONFIG_X86) && (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,15))
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/*
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* These are too slow in earlier kernels.
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*/
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extern int drm_unmap_page_from_agp(struct page *page);
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extern int drm_map_page_into_agp(struct page *page);
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#define map_page_into_agp drm_map_page_into_agp
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#define unmap_page_from_agp drm_unmap_page_from_agp
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#endif
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#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19))
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/*
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* Hopefully, real NOPAGE_RETRY functionality will be in 2.6.19.
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* For now, just return a dummy page that we've allocated out of
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* static space. The page will be put by do_nopage() since we've already
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* filled out the pte.
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*/
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struct fault_data {
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struct vm_area_struct *vma;
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unsigned long address;
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pgoff_t pgoff;
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unsigned int flags;
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int type;
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};
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extern struct page *get_nopage_retry(void);
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extern void free_nopage_retry(void);
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#define NOPAGE_REFAULT get_nopage_retry()
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extern int vm_insert_pfn(struct vm_area_struct *vma, unsigned long addr,
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unsigned long pfn, pgprot_t pgprot);
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extern struct page *drm_vm_ttm_nopage(struct vm_area_struct *vma,
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unsigned long address,
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int *type);
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extern struct page *drm_vm_ttm_fault(struct vm_area_struct *vma,
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struct fault_data *data);
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#endif
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#ifdef DRM_ODD_MM_COMPAT
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struct drm_ttm;
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/*
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* Add a vma to the ttm vma list, and the
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* process mm pointer to the ttm mm list. Needs the ttm mutex.
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*/
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extern int drm_ttm_add_vma(struct drm_ttm * ttm,
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struct vm_area_struct *vma);
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/*
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* Delete a vma and the corresponding mm pointer from the
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* ttm lists. Needs the ttm mutex.
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*/
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extern void drm_ttm_delete_vma(struct drm_ttm * ttm,
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struct vm_area_struct *vma);
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/*
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* Attempts to lock all relevant mmap_sems for a ttm, while
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* not releasing the ttm mutex. May return -EAGAIN to avoid
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* deadlocks. In that case the caller shall release the ttm mutex,
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* schedule() and try again.
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*/
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extern int drm_ttm_lock_mm(struct drm_ttm * ttm);
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/*
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* Unlock all relevant mmap_sems for a ttm.
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*/
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extern void drm_ttm_unlock_mm(struct drm_ttm * ttm);
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/*
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* If the ttm was bound to the aperture, this function shall be called
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* with all relevant mmap sems held. It deletes the flag VM_PFNMAP from all
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* vmas mapping this ttm. This is needed just after unmapping the ptes of
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* the vma, otherwise the do_nopage() function will bug :(. The function
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* releases the mmap_sems for this ttm.
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*/
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extern void drm_ttm_finish_unmap(struct drm_ttm *ttm);
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/*
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* Remap all vmas of this ttm using io_remap_pfn_range. We cannot
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* fault these pfns in, because the first one will set the vma VM_PFNMAP
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* flag, which will make the next fault bug in do_nopage(). The function
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* releases the mmap_sems for this ttm.
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*/
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extern int drm_ttm_remap_bound(struct drm_ttm *ttm);
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/*
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* Remap a vma for a bound ttm. Call with the ttm mutex held and
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* the relevant mmap_sem locked.
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*/
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extern int drm_ttm_map_bound(struct vm_area_struct *vma);
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#endif
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#endif
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