X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=drivers%2Fchar%2Fdrm%2Fdrm_memory.h;h=714d9aedcff5dd38200eaf18dfcf029f1a36722c;hb=43bc926fffd92024b46cafaf7350d669ba9ca884;hp=c68e8d5eb69a988872842c69b517bf93e57ecff7;hpb=c7b5ebbddf7bcd3651947760f423e3783bbe6573;p=linux-2.6.git diff --git a/drivers/char/drm/drm_memory.h b/drivers/char/drm/drm_memory.h index c68e8d5eb..714d9aedc 100644 --- a/drivers/char/drm/drm_memory.h +++ b/drivers/char/drm/drm_memory.h @@ -1,12 +1,12 @@ -/** - * \file drm_memory.h +/** + * \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. @@ -35,14 +35,13 @@ #include #include +#include #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. + * drm_memory.h. */ -#define DEBUG_MEMORY 0 #if __OS_HAS_AGP @@ -58,312 +57,26 @@ # endif #endif -#include - -/* - * 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) +static inline unsigned long drm_follow_page(void *vaddr) { - 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); + pgd_t *pgd = pgd_offset_k((unsigned long)vaddr); + pud_t *pud = pud_offset(pgd, (unsigned long)vaddr); + pmd_t *pmd = pmd_offset(pud, (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 (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); - } - return ioremap(offset, size); -} +#else /* __OS_HAS_AGP */ -static inline void *drm_ioremap_nocache(unsigned long offset, unsigned long size, - drm_device_t *dev) -{ - 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); - } - return ioremap_nocache(offset, size); -} - -static inline void drm_ioremapfree(void *pt, unsigned long size, drm_device_t *dev) -{ - /* - * 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; - } - } - - 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) +static inline unsigned long drm_follow_page(void *vaddr) { 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 __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; -} +#endif -/** Wrapper around agp_bind_memory() */ -int DRM(bind_agp)(DRM_AGP_MEM *handle, unsigned int start) -{ - return DRM(agp_bind_memory)(handle, start); -} +void *drm_ioremap(unsigned long offset, unsigned long size, + drm_device_t * dev); -/** Wrapper around agp_unbind_memory() */ -int DRM(unbind_agp)(DRM_AGP_MEM *handle) -{ - return DRM(agp_unbind_memory)(handle); -} -#endif /* agp */ -#endif /* debug_memory */ +void drm_ioremapfree(void *pt, unsigned long size, + drm_device_t * dev);