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Diffstat (limited to 'drivers/char/drm/drm_scatter.c')
-rw-r--r--drivers/char/drm/drm_scatter.c227
1 files changed, 0 insertions, 227 deletions
diff --git a/drivers/char/drm/drm_scatter.c b/drivers/char/drm/drm_scatter.c
deleted file mode 100644
index b2b0f3d41714..000000000000
--- a/drivers/char/drm/drm_scatter.c
+++ /dev/null
@@ -1,227 +0,0 @@
-/**
- * \file drm_scatter.c
- * IOCTLs to manage scatter/gather memory
- *
- * \author Gareth Hughes <gareth@valinux.com>
- */
-
-/*
- * Created: Mon Dec 18 23:20:54 2000 by gareth@valinux.com
- *
- * 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
- * PRECISION INSIGHT 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/vmalloc.h>
-#include "drmP.h"
-
-#define DEBUG_SCATTER 0
-
-static inline void *drm_vmalloc_dma(unsigned long size)
-{
-#if defined(__powerpc__) && defined(CONFIG_NOT_COHERENT_CACHE)
- return __vmalloc(size, GFP_KERNEL, PAGE_KERNEL | _PAGE_NO_CACHE);
-#else
- return vmalloc_32(size);
-#endif
-}
-
-void drm_sg_cleanup(struct drm_sg_mem * entry)
-{
- struct page *page;
- int i;
-
- for (i = 0; i < entry->pages; i++) {
- page = entry->pagelist[i];
- if (page)
- ClearPageReserved(page);
- }
-
- vfree(entry->virtual);
-
- drm_free(entry->busaddr,
- entry->pages * sizeof(*entry->busaddr), DRM_MEM_PAGES);
- drm_free(entry->pagelist,
- entry->pages * sizeof(*entry->pagelist), DRM_MEM_PAGES);
- drm_free(entry, sizeof(*entry), DRM_MEM_SGLISTS);
-}
-
-#ifdef _LP64
-# define ScatterHandle(x) (unsigned int)((x >> 32) + (x & ((1L << 32) - 1)))
-#else
-# define ScatterHandle(x) (unsigned int)(x)
-#endif
-
-int drm_sg_alloc(struct drm_device *dev, struct drm_scatter_gather * request)
-{
- struct drm_sg_mem *entry;
- unsigned long pages, i, j;
-
- DRM_DEBUG("\n");
-
- if (!drm_core_check_feature(dev, DRIVER_SG))
- return -EINVAL;
-
- if (dev->sg)
- return -EINVAL;
-
- entry = drm_alloc(sizeof(*entry), DRM_MEM_SGLISTS);
- if (!entry)
- return -ENOMEM;
-
- memset(entry, 0, sizeof(*entry));
- pages = (request->size + PAGE_SIZE - 1) / PAGE_SIZE;
- DRM_DEBUG("size=%ld pages=%ld\n", request->size, pages);
-
- entry->pages = pages;
- entry->pagelist = drm_alloc(pages * sizeof(*entry->pagelist),
- DRM_MEM_PAGES);
- if (!entry->pagelist) {
- drm_free(entry, sizeof(*entry), DRM_MEM_SGLISTS);
- return -ENOMEM;
- }
-
- memset(entry->pagelist, 0, pages * sizeof(*entry->pagelist));
-
- entry->busaddr = drm_alloc(pages * sizeof(*entry->busaddr),
- DRM_MEM_PAGES);
- if (!entry->busaddr) {
- drm_free(entry->pagelist,
- entry->pages * sizeof(*entry->pagelist),
- DRM_MEM_PAGES);
- drm_free(entry, sizeof(*entry), DRM_MEM_SGLISTS);
- return -ENOMEM;
- }
- memset((void *)entry->busaddr, 0, pages * sizeof(*entry->busaddr));
-
- entry->virtual = drm_vmalloc_dma(pages << PAGE_SHIFT);
- if (!entry->virtual) {
- drm_free(entry->busaddr,
- entry->pages * sizeof(*entry->busaddr), DRM_MEM_PAGES);
- drm_free(entry->pagelist,
- entry->pages * sizeof(*entry->pagelist),
- DRM_MEM_PAGES);
- drm_free(entry, sizeof(*entry), DRM_MEM_SGLISTS);
- return -ENOMEM;
- }
-
- /* This also forces the mapping of COW pages, so our page list
- * will be valid. Please don't remove it...
- */
- memset(entry->virtual, 0, pages << PAGE_SHIFT);
-
- entry->handle = ScatterHandle((unsigned long)entry->virtual);
-
- DRM_DEBUG("handle = %08lx\n", entry->handle);
- DRM_DEBUG("virtual = %p\n", entry->virtual);
-
- for (i = (unsigned long)entry->virtual, j = 0; j < pages;
- i += PAGE_SIZE, j++) {
- entry->pagelist[j] = vmalloc_to_page((void *)i);
- if (!entry->pagelist[j])
- goto failed;
- SetPageReserved(entry->pagelist[j]);
- }
-
- request->handle = entry->handle;
-
- dev->sg = entry;
-
-#if DEBUG_SCATTER
- /* Verify that each page points to its virtual address, and vice
- * versa.
- */
- {
- int error = 0;
-
- for (i = 0; i < pages; i++) {
- unsigned long *tmp;
-
- tmp = page_address(entry->pagelist[i]);
- for (j = 0;
- j < PAGE_SIZE / sizeof(unsigned long);
- j++, tmp++) {
- *tmp = 0xcafebabe;
- }
- tmp = (unsigned long *)((u8 *) entry->virtual +
- (PAGE_SIZE * i));
- for (j = 0;
- j < PAGE_SIZE / sizeof(unsigned long);
- j++, tmp++) {
- if (*tmp != 0xcafebabe && error == 0) {
- error = 1;
- DRM_ERROR("Scatter allocation error, "
- "pagelist does not match "
- "virtual mapping\n");
- }
- }
- tmp = page_address(entry->pagelist[i]);
- for (j = 0;
- j < PAGE_SIZE / sizeof(unsigned long);
- j++, tmp++) {
- *tmp = 0;
- }
- }
- if (error == 0)
- DRM_ERROR("Scatter allocation matches pagelist\n");
- }
-#endif
-
- return 0;
-
- failed:
- drm_sg_cleanup(entry);
- return -ENOMEM;
-}
-EXPORT_SYMBOL(drm_sg_alloc);
-
-
-int drm_sg_alloc_ioctl(struct drm_device *dev, void *data,
- struct drm_file *file_priv)
-{
- struct drm_scatter_gather *request = data;
-
- return drm_sg_alloc(dev, request);
-
-}
-
-int drm_sg_free(struct drm_device *dev, void *data,
- struct drm_file *file_priv)
-{
- struct drm_scatter_gather *request = data;
- struct drm_sg_mem *entry;
-
- if (!drm_core_check_feature(dev, DRIVER_SG))
- return -EINVAL;
-
- entry = dev->sg;
- dev->sg = NULL;
-
- if (!entry || entry->handle != request->handle)
- return -EINVAL;
-
- DRM_DEBUG("virtual = %p\n", entry->virtual);
-
- drm_sg_cleanup(entry);
-
- return 0;
-}