diff options
Diffstat (limited to 'shared-core/radeon_mem.c')
-rw-r--r-- | shared-core/radeon_mem.c | 302 |
1 files changed, 0 insertions, 302 deletions
diff --git a/shared-core/radeon_mem.c b/shared-core/radeon_mem.c deleted file mode 100644 index dbd73c50..00000000 --- a/shared-core/radeon_mem.c +++ /dev/null @@ -1,302 +0,0 @@ -/* radeon_mem.c -- Simple GART/fb memory manager for radeon -*- linux-c -*- */ -/* - * Copyright (C) The Weather Channel, Inc. 2002. All Rights Reserved. - * - * The Weather Channel (TM) funded Tungsten Graphics to develop the - * initial release of the Radeon 8500 driver under the XFree86 license. - * This notice must be preserved. - * - * 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. - * - * Authors: - * Keith Whitwell <keith@tungstengraphics.com> - */ - -#include "drmP.h" -#include "drm.h" -#include "radeon_drm.h" -#include "radeon_drv.h" - -/* Very simple allocator for GART memory, working on a static range - * already mapped into each client's address space. - */ - -static struct mem_block *split_block(struct mem_block *p, int start, int size, - struct drm_file *file_priv) -{ - /* Maybe cut off the start of an existing block */ - if (start > p->start) { - struct mem_block *newblock = - drm_alloc(sizeof(*newblock), DRM_MEM_BUFS); - if (!newblock) - goto out; - newblock->start = start; - newblock->size = p->size - (start - p->start); - newblock->file_priv = NULL; - newblock->next = p->next; - newblock->prev = p; - p->next->prev = newblock; - p->next = newblock; - p->size -= newblock->size; - p = newblock; - } - - /* Maybe cut off the end of an existing block */ - if (size < p->size) { - struct mem_block *newblock = - drm_alloc(sizeof(*newblock), DRM_MEM_BUFS); - if (!newblock) - goto out; - newblock->start = start + size; - newblock->size = p->size - size; - newblock->file_priv = NULL; - newblock->next = p->next; - newblock->prev = p; - p->next->prev = newblock; - p->next = newblock; - p->size = size; - } - - out: - /* Our block is in the middle */ - p->file_priv = file_priv; - return p; -} - -static struct mem_block *alloc_block(struct mem_block *heap, int size, - int align2, struct drm_file *file_priv) -{ - struct mem_block *p; - int mask = (1 << align2) - 1; - - list_for_each(p, heap) { - int start = (p->start + mask) & ~mask; - if (p->file_priv == NULL && start + size <= p->start + p->size) - return split_block(p, start, size, file_priv); - } - - return NULL; -} - -static struct mem_block *find_block(struct mem_block *heap, int start) -{ - struct mem_block *p; - - list_for_each(p, heap) - if (p->start == start) - return p; - - return NULL; -} - -static void free_block(struct mem_block *p) -{ - p->file_priv = NULL; - - /* Assumes a single contiguous range. Needs a special file_priv in - * 'heap' to stop it being subsumed. - */ - if (p->next->file_priv == NULL) { - struct mem_block *q = p->next; - p->size += q->size; - p->next = q->next; - p->next->prev = p; - drm_free(q, sizeof(*q), DRM_MEM_BUFS); - } - - if (p->prev->file_priv == NULL) { - struct mem_block *q = p->prev; - q->size += p->size; - q->next = p->next; - q->next->prev = q; - drm_free(p, sizeof(*q), DRM_MEM_BUFS); - } -} - -/* Initialize. How to check for an uninitialized heap? - */ -static int init_heap(struct mem_block **heap, int start, int size) -{ - struct mem_block *blocks = drm_alloc(sizeof(*blocks), DRM_MEM_BUFS); - - if (!blocks) - return -ENOMEM; - - *heap = drm_alloc(sizeof(**heap), DRM_MEM_BUFS); - if (!*heap) { - drm_free(blocks, sizeof(*blocks), DRM_MEM_BUFS); - return -ENOMEM; - } - - blocks->start = start; - blocks->size = size; - blocks->file_priv = NULL; - blocks->next = blocks->prev = *heap; - - memset(*heap, 0, sizeof(**heap)); - (*heap)->file_priv = (struct drm_file *) - 1; - (*heap)->next = (*heap)->prev = blocks; - return 0; -} - -/* Free all blocks associated with the releasing file. - */ -void radeon_mem_release(struct drm_file *file_priv, struct mem_block *heap) -{ - struct mem_block *p; - - if (!heap || !heap->next) - return; - - list_for_each(p, heap) { - if (p->file_priv == file_priv) - p->file_priv = NULL; - } - - /* Assumes a single contiguous range. Needs a special file_priv in - * 'heap' to stop it being subsumed. - */ - list_for_each(p, heap) { - while (p->file_priv == NULL && p->next->file_priv == NULL) { - struct mem_block *q = p->next; - p->size += q->size; - p->next = q->next; - p->next->prev = p; - drm_free(q, sizeof(*q), DRM_MEM_DRIVER); - } - } -} - -/* Shutdown. - */ -void radeon_mem_takedown(struct mem_block **heap) -{ - struct mem_block *p; - - if (!*heap) - return; - - for (p = (*heap)->next; p != *heap;) { - struct mem_block *q = p; - p = p->next; - drm_free(q, sizeof(*q), DRM_MEM_DRIVER); - } - - drm_free(*heap, sizeof(**heap), DRM_MEM_DRIVER); - *heap = NULL; -} - -/* IOCTL HANDLERS */ - -static struct mem_block **get_heap(drm_radeon_private_t * dev_priv, int region) -{ - switch (region) { - case RADEON_MEM_REGION_GART: - return &dev_priv->gart_heap; - case RADEON_MEM_REGION_FB: - return &dev_priv->fb_heap; - default: - return NULL; - } -} - -int radeon_mem_alloc(struct drm_device *dev, void *data, struct drm_file *file_priv) -{ - drm_radeon_private_t *dev_priv = dev->dev_private; - drm_radeon_mem_alloc_t *alloc = data; - struct mem_block *block, **heap; - - if (!dev_priv) { - DRM_ERROR("called with no initialization\n"); - return -EINVAL; - } - - heap = get_heap(dev_priv, alloc->region); - if (!heap || !*heap) - return -EFAULT; - - /* Make things easier on ourselves: all allocations at least - * 4k aligned. - */ - if (alloc->alignment < 12) - alloc->alignment = 12; - - block = alloc_block(*heap, alloc->size, alloc->alignment, file_priv); - - if (!block) - return -ENOMEM; - - if (DRM_COPY_TO_USER(alloc->region_offset, &block->start, - sizeof(int))) { - DRM_ERROR("copy_to_user\n"); - return -EFAULT; - } - - return 0; -} - -int radeon_mem_free(struct drm_device *dev, void *data, struct drm_file *file_priv) -{ - drm_radeon_private_t *dev_priv = dev->dev_private; - drm_radeon_mem_free_t *memfree = data; - struct mem_block *block, **heap; - - if (!dev_priv) { - DRM_ERROR("called with no initialization\n"); - return -EINVAL; - } - - heap = get_heap(dev_priv, memfree->region); - if (!heap || !*heap) - return -EFAULT; - - block = find_block(*heap, memfree->region_offset); - if (!block) - return -EFAULT; - - if (block->file_priv != file_priv) - return -EPERM; - - free_block(block); - return 0; -} - -int radeon_mem_init_heap(struct drm_device *dev, void *data, struct drm_file *file_priv) -{ - drm_radeon_private_t *dev_priv = dev->dev_private; - drm_radeon_mem_init_heap_t *initheap = data; - struct mem_block **heap; - - if (!dev_priv) { - DRM_ERROR("called with no initialization\n"); - return -EINVAL; - } - - heap = get_heap(dev_priv, initheap->region); - if (!heap) - return -EFAULT; - - if (*heap) { - DRM_ERROR("heap already initialized?"); - return -EFAULT; - } - - return init_heap(heap, initheap->start, initheap->size); -} |