renesas/drm.git - libdrm, cloned from git://anongit.freedesktop.org/mesa/drm

Age	Commit message (Expand)	Author
2006-07-19	.cvsignore -> .gitignore	Michel Dänzer
2005-04-26	Convert NOMAN to the new preferred spelling NO_MAN to quiet warnings.	Eric Anholt
2004-11-06	Add the drm Makefile and update .cvsignores.	Eric Anholt

/** * \file drm_memory.h * Memory management wrappers for DRM * * \author Rickard E. (Rik) Faith <faith@valinux.com> * \author Gareth Hughes <gareth@valinux.com> */ /* * Created: Thu Feb 4 14:00:34 1999 by faith@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. */ #include <linux/config.h> #include <linux/highmem.h> #include <linux/vmalloc.h> #include "drmP.h" /** * Cut down version of drm_memory_debug.h, which used to be called * drm_memory.h. */ /* Need the 4-argument version of vmap(). */ #if __OS_HAS_AGP && defined(VMAP_4_ARGS) #include <linux/vmalloc.h> #ifdef HAVE_PAGE_AGP #include <asm/agp.h> #else # ifdef __powerpc__ # define PAGE_AGP __pgprot(_PAGE_KERNEL | _PAGE_NO_CACHE) # else # define PAGE_AGP PAGE_KERNEL # endif #endif #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) #ifndef pte_offset_kernel # define pte_offset_kernel(dir, address) pte_offset(dir, address) #endif #ifndef pte_pfn # define pte_pfn(pte) (pte_page(pte) - mem_map) #endif #ifndef pfn_to_page # define pfn_to_page(pfn) (mem_map + (pfn)) #endif #endif /* * Find the drm_map that covers the range [offset, offset+size). */ static inline drm_map_t *drm_lookup_map(unsigned long offset, unsigned long size, drm_device_t * dev) { struct list_head *list; drm_map_list_t *r_list; drm_map_t *map; list_for_each(list, &dev->maplist->head) { r_list = (drm_map_list_t *) list; map = r_list->map; if (!map) continue; if (map->offset <= offset && (offset + size) <= (map->offset + map->size)) return map; } return NULL; } static inline void *agp_remap(unsigned long offset, unsigned long size, drm_device_t * dev) { unsigned long *phys_addr_map, i, num_pages = PAGE_ALIGN(size) / PAGE_SIZE; struct drm_agp_mem *agpmem; struct page **page_map; void *addr; size = PAGE_ALIGN(size); #ifdef __alpha__ offset -= dev->hose->mem_space->start; #endif for (agpmem = dev->agp->memory; agpmem; agpmem = agpmem->next) if (agpmem->bound <= offset && (agpmem->bound + (agpmem->pages << PAGE_SHIFT)) >= (offset + size)) break; if (!agpmem) return NULL; /* * OK, we're mapping AGP space on a chipset/platform on which memory accesses by * the CPU do not get remapped by the GART. We fix this by using the kernel's * page-table instead (that's probably faster anyhow...). */ /* note: use vmalloc() because num_pages could be large... */ page_map = vmalloc(num_pages * sizeof(struct page *)); if (!page_map) return NULL; phys_addr_map = agpmem->memory->memory + (offset - agpmem->bound) / PAGE_SIZE; for (i = 0; i < num_pages; ++i) page_map[i] = pfn_to_page(phys_addr_map[i] >> PAGE_SHIFT); addr = vmap(page_map, num_pages, VM_IOREMAP, PAGE_AGP); vfree(page_map); return addr; } static inline unsigned long drm_follow_page(void *vaddr) { pgd_t *pgd = pgd_offset_k((unsigned long) vaddr); #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,10) pmd_t *pmd = pmd_offset(pgd, (unsigned long)vaddr); #else pud_t *pud = pud_offset(pgd, (unsigned long) vaddr); pmd_t *pmd = pmd_offset(pud, (unsigned long) vaddr); #endif pte_t *ptep = pte_offset_kernel(pmd, (unsigned long) vaddr); return pte_pfn(*ptep) << PAGE_SHIFT; } #else /* __OS_HAS_AGP */ static inline drm_map_t *drm_lookup_map(unsigned long offset, unsigned long size, drm_device_t * dev) { return NULL; } static inline void *agp_remap(unsigned long offset, unsigned long size, drm_device_t * dev) { return NULL; } static inline unsigned long drm_follow_page(void *vaddr) { return 0; } #endif #ifndef DEBUG_MEMORY static inline void *drm_ioremap(unsigned long offset, unsigned long size, drm_device_t * dev) { #if defined(VMAP_4_ARGS) if (drm_core_has_AGP(dev) && dev->agp && dev->agp->cant_use_aperture) { drm_map_t *map = drm_lookup_map(offset, size, dev); if (map && map->type == _DRM_AGP) return agp_remap(offset, size, dev); } #endif return ioremap(offset, size); } static inline void *drm_ioremap_nocache(unsigned long offset, unsigned long size, drm_device_t * dev) { #if defined(VMAP_4_ARGS) if (drm_core_has_AGP(dev) && dev->agp && dev->agp->cant_use_aperture) { drm_map_t *map = drm_lookup_map(offset, size, dev); if (map && map->type == _DRM_AGP) return agp_remap(offset, size, dev); } #endif return ioremap_nocache(offset, size); } static inline void drm_ioremapfree(void *pt, unsigned long size, drm_device_t * dev) { #if defined(VMAP_4_ARGS) /* * This is a bit ugly. It would be much cleaner if the DRM API would use separate * routines for handling mappings in the AGP space. Hopefully this can be done in * a future revision of the interface... */ if (drm_core_has_AGP(dev) && dev->agp && dev->agp->cant_use_aperture && ((unsigned long)pt >= VMALLOC_START && (unsigned long)pt < VMALLOC_END)) { unsigned long offset; drm_map_t *map; offset = drm_follow_page(pt) | ((unsigned long)pt & ~PAGE_MASK); map = drm_lookup_map(offset, size, dev); if (map && map->type == _DRM_AGP) { vunmap(pt); return; } } #endif iounmap(pt); } #else extern void *drm_ioremap(unsigned long offset, unsigned long size, drm_device_t * dev); extern void *drm_ioremap_nocache(unsigned long offset, unsigned long size, drm_device_t * dev); extern void drm_ioremapfree(void *pt, unsigned long size, drm_device_t * dev); #endif