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/*
* Copyright 2011 Red Hat Inc.
* 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, sub license, 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 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 NON-INFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDERS, AUTHORS 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.
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
*/
/*
* Authors:
* Jerome Glisse <glisse@freedesktop.org>
*/
#include "drmP.h"
#include "drm.h"
#include "radeon.h"
int radeon_sa_bo_manager_init(struct radeon_device *rdev,
struct radeon_sa_manager *sa_manager,
unsigned size, u32 domain)
{
int r;
spin_lock_init(&sa_manager->lock);
sa_manager->bo = NULL;
sa_manager->size = size;
sa_manager->domain = domain;
INIT_LIST_HEAD(&sa_manager->sa_bo);
r = radeon_bo_create(rdev, size, RADEON_GPU_PAGE_SIZE, true,
RADEON_GEM_DOMAIN_CPU, &sa_manager->bo);
if (r) {
dev_err(rdev->dev, "(%d) failed to allocate bo for manager\n", r);
return r;
}
return r;
}
void radeon_sa_bo_manager_fini(struct radeon_device *rdev,
struct radeon_sa_manager *sa_manager)
{
struct radeon_sa_bo *sa_bo, *tmp;
if (!list_empty(&sa_manager->sa_bo)) {
dev_err(rdev->dev, "sa_manager is not empty, clearing anyway\n");
}
list_for_each_entry_safe(sa_bo, tmp, &sa_manager->sa_bo, list) {
list_del_init(&sa_bo->list);
}
radeon_bo_unref(&sa_manager->bo);
sa_manager->size = 0;
}
int radeon_sa_bo_manager_start(struct radeon_device *rdev,
struct radeon_sa_manager *sa_manager)
{
int r;
if (sa_manager->bo == NULL) {
dev_err(rdev->dev, "no bo for sa manager\n");
return -EINVAL;
}
/* map the buffer */
r = radeon_bo_reserve(sa_manager->bo, false);
if (r) {
dev_err(rdev->dev, "(%d) failed to reserve manager bo\n", r);
return r;
}
r = radeon_bo_pin(sa_manager->bo, sa_manager->domain, &sa_manager->gpu_addr);
if (r) {
radeon_bo_unreserve(sa_manager->bo);
dev_err(rdev->dev, "(%d) failed to pin manager bo\n", r);
return r;
}
r = radeon_bo_kmap(sa_manager->bo, &sa_manager->cpu_ptr);
radeon_bo_unreserve(sa_manager->bo);
return r;
}
int radeon_sa_bo_manager_suspend(struct radeon_device *rdev,
struct radeon_sa_manager *sa_manager)
{
int r;
if (sa_manager->bo == NULL) {
dev_err(rdev->dev, "no bo for sa manager\n");
return -EINVAL;
}
r = radeon_bo_reserve(sa_manager->bo, false);
if (!r) {
radeon_bo_kunmap(sa_manager->bo);
radeon_bo_unpin(sa_manager->bo);
radeon_bo_unreserve(sa_manager->bo);
}
return r;
}
/*
* Principe is simple, we keep a list of sub allocation in offset
* order (first entry has offset == 0, last entry has the highest
* offset).
*
* When allocating new object we first check if there is room at
* the end total_size - (last_object_offset + last_object_size) >=
* alloc_size. If so we allocate new object there.
*
* When there is not enough room at the end, we start waiting for
* each sub object until we reach object_offset+object_size >=
* alloc_size, this object then become the sub object we return.
*
* Alignment can't be bigger than page size
*/
int radeon_sa_bo_new(struct radeon_device *rdev,
struct radeon_sa_manager *sa_manager,
struct radeon_sa_bo *sa_bo,
unsigned size, unsigned align)
{
struct radeon_sa_bo *tmp;
struct list_head *head;
unsigned offset = 0, wasted = 0;
BUG_ON(align > RADEON_GPU_PAGE_SIZE);
BUG_ON(size > sa_manager->size);
spin_lock(&sa_manager->lock);
/* no one ? */
head = sa_manager->sa_bo.prev;
if (list_empty(&sa_manager->sa_bo)) {
goto out;
}
/* look for a hole big enough */
offset = 0;
list_for_each_entry(tmp, &sa_manager->sa_bo, list) {
/* room before this object ? */
if (offset < tmp->offset && (tmp->offset - offset) >= size) {
head = tmp->list.prev;
goto out;
}
offset = tmp->offset + tmp->size;
wasted = offset % align;
if (wasted) {
wasted = align - wasted;
}
offset += wasted;
}
/* room at the end ? */
head = sa_manager->sa_bo.prev;
tmp = list_entry(head, struct radeon_sa_bo, list);
offset = tmp->offset + tmp->size;
wasted = offset % align;
if (wasted) {
wasted = align - wasted;
}
offset += wasted;
if ((sa_manager->size - offset) < size) {
/* failed to find somethings big enough */
spin_unlock(&sa_manager->lock);
return -ENOMEM;
}
out:
sa_bo->manager = sa_manager;
sa_bo->offset = offset;
sa_bo->size = size;
list_add(&sa_bo->list, head);
spin_unlock(&sa_manager->lock);
return 0;
}
void radeon_sa_bo_free(struct radeon_device *rdev, struct radeon_sa_bo *sa_bo)
{
spin_lock(&sa_bo->manager->lock);
list_del_init(&sa_bo->list);
spin_unlock(&sa_bo->manager->lock);
}
#if defined(CONFIG_DEBUG_FS)
void radeon_sa_bo_dump_debug_info(struct radeon_sa_manager *sa_manager,
struct seq_file *m)
{
struct radeon_sa_bo *i;
spin_lock(&sa_manager->lock);
list_for_each_entry(i, &sa_manager->sa_bo, list) {
seq_printf(m, "offset %08d: size %4d\n", i->offset, i->size);
}
spin_unlock(&sa_manager->lock);
}
#endif
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