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authorKristian Høgsberg <krh@bitplanet.net>2009-11-17 09:46:56 -0500
committerKristian Høgsberg <krh@bitplanet.net>2009-11-17 10:54:11 -0500
commit9dd3613073aa2491cef440725fdfa0cf1e8f1a42 (patch)
tree956c84be2fae4b4e6de2840a94d30dffa6573066 /linux-core/drm_memory.c
parenta66cf9ce68bdf9bd887f91a38ced4b59c129b3c7 (diff)
Drop shared-core, bsd-core, linux-core and scripts subdirs
Diffstat (limited to 'linux-core/drm_memory.c')
-rw-r--r--linux-core/drm_memory.c366
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);