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. */ #define __NO_VERSION__ #include <linux/config.h> #include "drmP.h" /** * Cut down version of drm_memory_debug.h, which used to be called * drm_memory.h. If you want the debug functionality, change 0 to 1 * below. */ #define DEBUG_MEMORY 0 /* Need the 4-argument version of vmap(). */ #if __REALLY_HAVE_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) # define pte_offset_kernel(dir, address) pte_offset(dir, address) # define pte_pfn(pte) (pte_page(pte) - mem_map) # define pfn_to_page(pfn) (mem_map + (pfn)) #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); pmd_t *pmd = pmd_offset(pgd, (unsigned long) vaddr); pte_t *ptep = pte_offset_kernel(pmd, (unsigned long) vaddr); return pte_pfn(*ptep) << PAGE_SHIFT; } #endif /* __REALLY_HAVE_AGP && defined(VMAP_4_ARGS) */ static inline void *drm_ioremap(unsigned long offset, unsigned long size, drm_device_t *dev) { #if __REALLY_HAVE_AGP && defined(VMAP_4_ARGS) if (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 __REALLY_HAVE_AGP && defined(VMAP_4_ARGS) if (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 __REALLY_HAVE_AGP && 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 (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); } #if DEBUG_MEMORY #include "drm_memory_debug.h" #else /** No-op. */ void DRM(mem_init)(void) { } /** * Called when "/proc/dri/%dev%/mem" is read. * * \param buf output buffer. * \param start start of output data. * \param offset requested start offset. * \param len requested number of bytes. * \param eof whether there is no more data to return. * \param data private data. * \return number of written bytes. * * No-op. */ int DRM(mem_info)(char *buf, char **start, off_t offset, int len, int *eof, void *data) { return 0; } /** Wrapper around kmalloc() */ void *DRM(alloc)(size_t size, int area) { return kmalloc(size, GFP_KERNEL); } /** Wrapper around kmalloc() */ void *DRM(calloc)(size_t size, size_t nmemb, int area) { void *addr; addr = kmalloc(size * nmemb, GFP_KERNEL); if (addr != NULL) memset((void *)addr, 0, size * nmemb); return addr; } /** Wrapper around kmalloc() and kfree() */ void *DRM(realloc)(void *oldpt, size_t oldsize, size_t size, int area) { void *pt; if (!(pt = kmalloc(size, GFP_KERNEL))) return NULL; if (oldpt && oldsize) { memcpy(pt, oldpt, oldsize); kfree(oldpt); } return pt; } /** Wrapper around kfree() */ void DRM(free)(void *pt, size_t size, int area) { kfree(pt); } /** * Allocate pages. * * \param order size order. * \param area memory area. (Not used.) * \return page address on success, or zero on failure. * * Allocate and reserve free pages. */ unsigned long DRM(alloc_pages)(int order, int area) { unsigned long address; unsigned long bytes = PAGE_SIZE << order; unsigned long addr; unsigned int sz; address = __get_free_pages(GFP_KERNEL, order); if (!address) return 0; /* Zero */ memset((void *)address, 0, bytes); /* Reserve */ for (addr = address, sz = bytes; sz > 0; addr += PAGE_SIZE, sz -= PAGE_SIZE) { SetPageReserved(virt_to_page(addr)); } return address; } /** * Free pages. * * \param address address of the pages to free. * \param order size order. * \param area memory area. (Not used.) * * Unreserve and free pages allocated by alloc_pages(). */ void DRM(free_pages)(unsigned long address, int order, int area) { unsigned long bytes = PAGE_SIZE << order; unsigned long addr; unsigned int sz; if (!address) return; /* Unreserve */ for (addr = address, sz = bytes; sz > 0; addr += PAGE_SIZE, sz -= PAGE_SIZE) { ClearPageReserved(virt_to_page(addr)); } free_pages(address, order); } /** Wrapper around drm_ioremap() */ void *DRM(ioremap)(unsigned long offset, unsigned long size, drm_device_t *dev) { return drm_ioremap(offset, size, dev); } /** Wrapper around drm_ioremap_nocache() */ void *DRM(ioremap_nocache)(unsigned long offset, unsigned long size, drm_device_t *dev) { return drm_ioremap_nocache(offset, size, dev); } /** Wrapper around drm_iounmap() */ void DRM(ioremapfree)(void *pt, unsigned long size, drm_device_t *dev) { drm_ioremapfree(pt, size, dev); } #if __REALLY_HAVE_AGP /** Wrapper around agp_allocate_memory() */ DRM_AGP_MEM *DRM(alloc_agp)(int pages, u32 type) { return DRM(agp_allocate_memory)(pages, type); } /** Wrapper around agp_free_memory() */ int DRM(free_agp)(DRM_AGP_MEM *handle, int pages) { return DRM(agp_free_memory)(handle) ? 0 : -EINVAL; } /** Wrapper around agp_bind_memory() */ int DRM(bind_agp)(DRM_AGP_MEM *handle, unsigned int start) { return DRM(agp_bind_memory)(handle, start); } /** Wrapper around agp_unbind_memory() */ int DRM(unbind_agp)(DRM_AGP_MEM *handle) { return DRM(agp_unbind_memory)(handle); } #endif /* agp */ #endif /* debug_memory */