mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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14adc89298
KMS support is out and stable for a couple of years now and the userspace code has deprecated or abandoned the old UMS interface. So make the KMS interface the default and deprecate the UMS interface in the kernel as well. v2: rebased on alex/drm-next-3.9-wip Signed-off-by: Christian König <christian.koenig@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
303 lines
7.2 KiB
C
303 lines
7.2 KiB
C
/* radeon_mem.c -- Simple GART/fb memory manager for radeon -*- linux-c -*- */
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/*
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* Copyright (C) The Weather Channel, Inc. 2002. All Rights Reserved.
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*
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* The Weather Channel (TM) funded Tungsten Graphics to develop the
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* initial release of the Radeon 8500 driver under the XFree86 license.
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* This notice must be preserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*
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* Authors:
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* Keith Whitwell <keith@tungstengraphics.com>
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*
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* ------------------------ This file is DEPRECATED! -------------------------
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*/
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#include <drm/drmP.h>
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#include <drm/radeon_drm.h>
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#include "radeon_drv.h"
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/* Very simple allocator for GART memory, working on a static range
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* already mapped into each client's address space.
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*/
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static struct mem_block *split_block(struct mem_block *p, int start, int size,
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struct drm_file *file_priv)
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{
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/* Maybe cut off the start of an existing block */
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if (start > p->start) {
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struct mem_block *newblock = kmalloc(sizeof(*newblock),
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GFP_KERNEL);
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if (!newblock)
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goto out;
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newblock->start = start;
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newblock->size = p->size - (start - p->start);
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newblock->file_priv = NULL;
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newblock->next = p->next;
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newblock->prev = p;
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p->next->prev = newblock;
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p->next = newblock;
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p->size -= newblock->size;
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p = newblock;
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}
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/* Maybe cut off the end of an existing block */
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if (size < p->size) {
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struct mem_block *newblock = kmalloc(sizeof(*newblock),
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GFP_KERNEL);
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if (!newblock)
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goto out;
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newblock->start = start + size;
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newblock->size = p->size - size;
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newblock->file_priv = NULL;
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newblock->next = p->next;
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newblock->prev = p;
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p->next->prev = newblock;
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p->next = newblock;
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p->size = size;
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}
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out:
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/* Our block is in the middle */
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p->file_priv = file_priv;
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return p;
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}
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static struct mem_block *alloc_block(struct mem_block *heap, int size,
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int align2, struct drm_file *file_priv)
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{
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struct mem_block *p;
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int mask = (1 << align2) - 1;
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list_for_each(p, heap) {
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int start = (p->start + mask) & ~mask;
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if (p->file_priv == NULL && start + size <= p->start + p->size)
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return split_block(p, start, size, file_priv);
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}
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return NULL;
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}
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static struct mem_block *find_block(struct mem_block *heap, int start)
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{
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struct mem_block *p;
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list_for_each(p, heap)
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if (p->start == start)
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return p;
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return NULL;
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}
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static void free_block(struct mem_block *p)
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{
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p->file_priv = NULL;
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/* Assumes a single contiguous range. Needs a special file_priv in
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* 'heap' to stop it being subsumed.
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*/
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if (p->next->file_priv == NULL) {
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struct mem_block *q = p->next;
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p->size += q->size;
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p->next = q->next;
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p->next->prev = p;
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kfree(q);
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}
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if (p->prev->file_priv == NULL) {
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struct mem_block *q = p->prev;
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q->size += p->size;
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q->next = p->next;
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q->next->prev = q;
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kfree(p);
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}
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}
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/* Initialize. How to check for an uninitialized heap?
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*/
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static int init_heap(struct mem_block **heap, int start, int size)
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{
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struct mem_block *blocks = kmalloc(sizeof(*blocks), GFP_KERNEL);
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if (!blocks)
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return -ENOMEM;
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*heap = kzalloc(sizeof(**heap), GFP_KERNEL);
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if (!*heap) {
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kfree(blocks);
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return -ENOMEM;
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}
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blocks->start = start;
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blocks->size = size;
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blocks->file_priv = NULL;
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blocks->next = blocks->prev = *heap;
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(*heap)->file_priv = (struct drm_file *) - 1;
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(*heap)->next = (*heap)->prev = blocks;
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return 0;
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}
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/* Free all blocks associated with the releasing file.
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*/
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void radeon_mem_release(struct drm_file *file_priv, struct mem_block *heap)
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{
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struct mem_block *p;
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if (!heap || !heap->next)
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return;
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list_for_each(p, heap) {
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if (p->file_priv == file_priv)
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p->file_priv = NULL;
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}
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/* Assumes a single contiguous range. Needs a special file_priv in
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* 'heap' to stop it being subsumed.
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*/
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list_for_each(p, heap) {
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while (p->file_priv == NULL && p->next->file_priv == NULL) {
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struct mem_block *q = p->next;
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p->size += q->size;
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p->next = q->next;
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p->next->prev = p;
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kfree(q);
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}
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}
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}
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/* Shutdown.
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*/
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void radeon_mem_takedown(struct mem_block **heap)
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{
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struct mem_block *p;
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if (!*heap)
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return;
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for (p = (*heap)->next; p != *heap;) {
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struct mem_block *q = p;
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p = p->next;
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kfree(q);
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}
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kfree(*heap);
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*heap = NULL;
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}
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/* IOCTL HANDLERS */
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static struct mem_block **get_heap(drm_radeon_private_t * dev_priv, int region)
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{
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switch (region) {
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case RADEON_MEM_REGION_GART:
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return &dev_priv->gart_heap;
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case RADEON_MEM_REGION_FB:
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return &dev_priv->fb_heap;
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default:
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return NULL;
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}
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}
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int radeon_mem_alloc(struct drm_device *dev, void *data, struct drm_file *file_priv)
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{
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drm_radeon_private_t *dev_priv = dev->dev_private;
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drm_radeon_mem_alloc_t *alloc = data;
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struct mem_block *block, **heap;
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if (!dev_priv) {
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DRM_ERROR("called with no initialization\n");
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return -EINVAL;
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}
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heap = get_heap(dev_priv, alloc->region);
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if (!heap || !*heap)
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return -EFAULT;
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/* Make things easier on ourselves: all allocations at least
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* 4k aligned.
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*/
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if (alloc->alignment < 12)
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alloc->alignment = 12;
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block = alloc_block(*heap, alloc->size, alloc->alignment, file_priv);
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if (!block)
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return -ENOMEM;
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if (DRM_COPY_TO_USER(alloc->region_offset, &block->start,
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sizeof(int))) {
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DRM_ERROR("copy_to_user\n");
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return -EFAULT;
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}
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return 0;
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}
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int radeon_mem_free(struct drm_device *dev, void *data, struct drm_file *file_priv)
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{
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drm_radeon_private_t *dev_priv = dev->dev_private;
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drm_radeon_mem_free_t *memfree = data;
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struct mem_block *block, **heap;
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if (!dev_priv) {
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DRM_ERROR("called with no initialization\n");
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return -EINVAL;
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}
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heap = get_heap(dev_priv, memfree->region);
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if (!heap || !*heap)
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return -EFAULT;
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block = find_block(*heap, memfree->region_offset);
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if (!block)
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return -EFAULT;
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if (block->file_priv != file_priv)
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return -EPERM;
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free_block(block);
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return 0;
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}
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int radeon_mem_init_heap(struct drm_device *dev, void *data, struct drm_file *file_priv)
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{
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drm_radeon_private_t *dev_priv = dev->dev_private;
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drm_radeon_mem_init_heap_t *initheap = data;
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struct mem_block **heap;
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if (!dev_priv) {
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DRM_ERROR("called with no initialization\n");
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return -EINVAL;
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}
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heap = get_heap(dev_priv, initheap->region);
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if (!heap)
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return -EFAULT;
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if (*heap) {
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DRM_ERROR("heap already initialized?");
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return -EFAULT;
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}
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return init_heap(heap, initheap->start, initheap->size);
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}
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