From f4092abdf94af6a99aff944d6264bc1284e8bdd4 Mon Sep 17 00:00:00 2001 From: Reinhard Tartler Date: Mon, 10 Oct 2011 17:43:39 +0200 Subject: Imported nx-X11-3.1.0-1.tar.gz Summary: Imported nx-X11-3.1.0-1.tar.gz Keywords: Imported nx-X11-3.1.0-1.tar.gz into Git repository --- nx-X11/extras/drm/linux/drm_memory.h | 374 +++++++++++++++++++++++++++++++++++ 1 file changed, 374 insertions(+) create mode 100644 nx-X11/extras/drm/linux/drm_memory.h (limited to 'nx-X11/extras/drm/linux/drm_memory.h') diff --git a/nx-X11/extras/drm/linux/drm_memory.h b/nx-X11/extras/drm/linux/drm_memory.h new file mode 100644 index 000000000..9674cef0b --- /dev/null +++ b/nx-X11/extras/drm/linux/drm_memory.h @@ -0,0 +1,374 @@ +/** + * \file drm_memory.h + * Memory management wrappers for DRM + * + * \author Rickard E. (Rik) Faith + * \author Gareth Hughes + */ + +/* + * 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 +#include +#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 + +#ifdef HAVE_PAGE_AGP +#include +#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); + 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; +} + +#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 + +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); +} + + +#ifdef 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(calloc)(size_t nmemb, size_t size, 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; +} + +/** + * 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 __OS_HAS_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 */ -- cgit v1.2.3