diff options
Diffstat (limited to 'drivers/gpu/drm/radeon/radeon_sa.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/radeon_sa.c | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_sa.c b/drivers/gpu/drm/radeon/radeon_sa.c new file mode 100644 index 00000000000..4cce47e7dc0 --- /dev/null +++ b/drivers/gpu/drm/radeon/radeon_sa.c @@ -0,0 +1,189 @@ +/* + * 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; + + 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); + + /* 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 ((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 */ + return -ENOMEM; + } + +out: + sa_bo->manager = sa_manager; + sa_bo->offset = offset; + sa_bo->size = size; + list_add(&sa_bo->list, head); + return 0; +} + +void radeon_sa_bo_free(struct radeon_device *rdev, struct radeon_sa_bo *sa_bo) +{ + list_del_init(&sa_bo->list); +} |