diff options
Diffstat (limited to 'linux-core/drm_memory.c')
| -rw-r--r-- | linux-core/drm_memory.c | 366 |
1 files changed, 0 insertions, 366 deletions
diff --git a/linux-core/drm_memory.c b/linux-core/drm_memory.c deleted file mode 100644 index b6f0485c..00000000 --- a/linux-core/drm_memory.c +++ /dev/null @@ -1,366 +0,0 @@ -/** - * \file drm_memory.c - * 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/highmem.h> -#include "drmP.h" - -static struct { - spinlock_t lock; - uint64_t cur_used; - uint64_t emer_used; - uint64_t low_threshold; - uint64_t high_threshold; - uint64_t emer_threshold; -} drm_memctl = { - .lock = SPIN_LOCK_UNLOCKED -}; - -static inline size_t drm_size_align(size_t size) -{ - size_t tmpSize = 4; - if (size > PAGE_SIZE) - return PAGE_ALIGN(size); - - while (tmpSize < size) - tmpSize <<= 1; - - return (size_t) tmpSize; -} - -int drm_alloc_memctl(size_t size) -{ - int ret = 0; - unsigned long a_size = drm_size_align(size); - unsigned long new_used; - - spin_lock(&drm_memctl.lock); - new_used = drm_memctl.cur_used + a_size; - if (likely(new_used < drm_memctl.high_threshold)) { - drm_memctl.cur_used = new_used; - goto out; - } - - /* - * Allow small allocations from root-only processes to - * succeed until the emergency threshold is reached. - */ - - new_used += drm_memctl.emer_used; - if (unlikely(!DRM_SUSER(DRM_CURPROC) || - (a_size > 16*PAGE_SIZE) || - (new_used > drm_memctl.emer_threshold))) { - ret = -ENOMEM; - goto out; - } - - drm_memctl.cur_used = drm_memctl.high_threshold; - drm_memctl.emer_used = new_used - drm_memctl.high_threshold; -out: - spin_unlock(&drm_memctl.lock); - return ret; -} -EXPORT_SYMBOL(drm_alloc_memctl); - - -void drm_free_memctl(size_t size) -{ - unsigned long a_size = drm_size_align(size); - - spin_lock(&drm_memctl.lock); - if (likely(a_size >= drm_memctl.emer_used)) { - a_size -= drm_memctl.emer_used; - drm_memctl.emer_used = 0; - } else { - drm_memctl.emer_used -= a_size; - a_size = 0; - } - drm_memctl.cur_used -= a_size; - spin_unlock(&drm_memctl.lock); -} -EXPORT_SYMBOL(drm_free_memctl); - -void drm_query_memctl(uint64_t *cur_used, - uint64_t *emer_used, - uint64_t *low_threshold, - uint64_t *high_threshold, - uint64_t *emer_threshold) -{ - spin_lock(&drm_memctl.lock); - *cur_used = drm_memctl.cur_used; - *emer_used = drm_memctl.emer_used; - *low_threshold = drm_memctl.low_threshold; - *high_threshold = drm_memctl.high_threshold; - *emer_threshold = drm_memctl.emer_threshold; - spin_unlock(&drm_memctl.lock); -} -EXPORT_SYMBOL(drm_query_memctl); - -void drm_init_memctl(size_t p_low_threshold, - size_t p_high_threshold, - size_t unit_size) -{ - spin_lock(&drm_memctl.lock); - drm_memctl.emer_used = 0; - drm_memctl.cur_used = 0; - drm_memctl.low_threshold = p_low_threshold * unit_size; - drm_memctl.high_threshold = p_high_threshold * unit_size; - drm_memctl.emer_threshold = (drm_memctl.high_threshold >> 4) + - drm_memctl.high_threshold; - spin_unlock(&drm_memctl.lock); -} - - -#ifndef DEBUG_MEMORY - -/** 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) -{ - return kcalloc(nmemb, size, GFP_KERNEL); -} -EXPORT_SYMBOL(drm_calloc); - -/** 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, DRM_MIN(oldsize,size)); - 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); -} - -#if __OS_HAS_AGP -static void *agp_remap(unsigned long offset, unsigned long size, - struct drm_device * 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 - - list_for_each_entry(agpmem, &dev->agp->memory, head) - 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; -} - -/** Wrapper around agp_allocate_memory() */ -DRM_AGP_MEM *drm_alloc_agp(struct drm_device *dev, int pages, u32 type) -{ - return drm_agp_allocate_memory(dev->agp->bridge, 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; -} -EXPORT_SYMBOL(drm_free_agp); - -/** 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); -} -EXPORT_SYMBOL(drm_unbind_agp); - -#else /* __OS_HAS_AGP*/ -static void *agp_remap(unsigned long offset, unsigned long size, - struct drm_device * dev) -{ - return NULL; -} -#endif /* agp */ -#else -static void *agp_remap(unsigned long offset, unsigned long size, - struct drm_device * dev) -{ - return NULL; -} -#endif /* debug_memory */ - -void drm_core_ioremap(struct drm_map *map, struct drm_device *dev) -{ - if (drm_core_has_AGP(dev) && - dev->agp && dev->agp->cant_use_aperture && map->type == _DRM_AGP) - map->handle = agp_remap(map->offset, map->size, dev); - else - map->handle = ioremap(map->offset, map->size); -} -EXPORT_SYMBOL_GPL(drm_core_ioremap); - - -#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,26) -void drm_core_ioremap_wc(struct drm_map *map, struct drm_device *dev) -{ - map->handle = ioremap_wc(map->offset, map->size); -} -EXPORT_SYMBOL_GPL(drm_core_ioremap_wc); -#endif - -void drm_core_ioremapfree(struct drm_map *map, struct drm_device *dev) -{ - if (!map->handle || !map->size) - return; - - if (drm_core_has_AGP(dev) && - dev->agp && dev->agp->cant_use_aperture && map->type == _DRM_AGP) - vunmap(map->handle); - else - iounmap(map->handle); -} -EXPORT_SYMBOL_GPL(drm_core_ioremapfree); |