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| /************************************************************************** |
| * |
| * Copyright (c) 2006-2009 VMware, Inc., Palo Alto, CA., USA |
| * 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 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 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. |
| * |
| **************************************************************************/ |
| /* |
| * Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com> |
| */ |
| /* Notes: |
| * |
| * We store bo pointer in drm_mm_node struct so we know which bo own a |
| * specific node. There is no protection on the pointer, thus to make |
| * sure things don't go berserk you have to access this pointer while |
| * holding the global lru lock and make sure anytime you free a node you |
| * reset the pointer to NULL. |
| */ |
| |
| #include "ttm/ttm_module.h" |
| #include "ttm/ttm_bo_driver.h" |
| #include "ttm/ttm_placement.h" |
| #include <linux/module.h> |
| |
| |
| |
| int ttm_bo_init_mm(struct ttm_bo_device *bdev, unsigned type, |
| unsigned long p_size) |
| { |
| int ret = -EINVAL; |
| struct ttm_mem_type_manager *man; |
| |
| if (type >= TTM_NUM_MEM_TYPES) { |
| printk(KERN_ERR TTM_PFX "Illegal memory type %d\n", type); |
| return ret; |
| } |
| |
| man = &bdev->man[type]; |
| if (man->has_type) { |
| printk(KERN_ERR TTM_PFX |
| "Memory manager already initialized for type %d\n", |
| type); |
| return ret; |
| } |
| |
| ret = bdev->driver->init_mem_type(bdev, type, man); |
| if (ret) |
| return ret; |
| |
| ret = 0; |
| if (type != TTM_PL_SYSTEM) { |
| if (!p_size) { |
| printk(KERN_ERR TTM_PFX |
| "Zero size memory manager type %d\n", |
| type); |
| return ret; |
| } |
| ret = drm_mm_init(&man->manager, 0, p_size); |
| if (ret) |
| return ret; |
| } |
| man->has_type = true; |
| man->use_type = true; |
| man->size = p_size; |
| |
| INIT_LIST_HEAD(&man->lru); |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(ttm_bo_init_mm); |
| |
| int ttm_bo_global_init(struct ttm_global_reference *ref) |
| { |
| struct ttm_bo_global_ref *bo_ref = |
| container_of(ref, struct ttm_bo_global_ref, ref); |
| struct ttm_bo_global *glob = ref->object; |
| int ret; |
| |
| // mutex_init(&glob->device_list_mutex); |
| // spin_lock_init(&glob->lru_lock); |
| glob->mem_glob = bo_ref->mem_glob; |
| // glob->dummy_read_page = alloc_page(__GFP_ZERO | GFP_DMA32); |
| |
| if (unlikely(glob->dummy_read_page == NULL)) { |
| ret = -ENOMEM; |
| goto out_no_drp; |
| } |
| |
| INIT_LIST_HEAD(&glob->swap_lru); |
| INIT_LIST_HEAD(&glob->device_list); |
| |
| // ttm_mem_init_shrink(&glob->shrink, ttm_bo_swapout); |
| ret = ttm_mem_register_shrink(glob->mem_glob, &glob->shrink); |
| if (unlikely(ret != 0)) { |
| printk(KERN_ERR TTM_PFX |
| "Could not register buffer object swapout.\n"); |
| goto out_no_shrink; |
| } |
| |
| glob->ttm_bo_extra_size = |
| ttm_round_pot(sizeof(struct ttm_tt)) + |
| ttm_round_pot(sizeof(struct ttm_backend)); |
| |
| glob->ttm_bo_size = glob->ttm_bo_extra_size + |
| ttm_round_pot(sizeof(struct ttm_buffer_object)); |
| |
| atomic_set(&glob->bo_count, 0); |
| |
| // kobject_init(&glob->kobj, &ttm_bo_glob_kobj_type); |
| // ret = kobject_add(&glob->kobj, ttm_get_kobj(), "buffer_objects"); |
| // if (unlikely(ret != 0)) |
| // kobject_put(&glob->kobj); |
| return ret; |
| out_no_shrink: |
| __free_page(glob->dummy_read_page); |
| out_no_drp: |
| kfree(glob); |
| return ret; |
| } |
| EXPORT_SYMBOL(ttm_bo_global_init); |
| |
| |