123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185 |
- /* SPDX-License-Identifier: GPL-2.0 OR MIT */
- /**************************************************************************
- *
- * Copyright (c) 2007-2010 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>
- */
- #include <drm/ttm/ttm_module.h>
- #include <drm/ttm/ttm_bo_driver.h>
- #include <drm/ttm/ttm_placement.h>
- #include <drm/drm_mm.h>
- #include <linux/slab.h>
- #include <linux/spinlock.h>
- #include <linux/module.h>
- /**
- * Currently we use a spinlock for the lock, but a mutex *may* be
- * more appropriate to reduce scheduling latency if the range manager
- * ends up with very fragmented allocation patterns.
- */
- struct ttm_range_manager {
- struct ttm_resource_manager manager;
- struct drm_mm mm;
- spinlock_t lock;
- };
- static inline struct ttm_range_manager *to_range_manager(struct ttm_resource_manager *man)
- {
- return container_of(man, struct ttm_range_manager, manager);
- }
- static int ttm_range_man_alloc(struct ttm_resource_manager *man,
- struct ttm_buffer_object *bo,
- const struct ttm_place *place,
- struct ttm_resource *mem)
- {
- struct ttm_range_manager *rman = to_range_manager(man);
- struct drm_mm *mm = &rman->mm;
- struct drm_mm_node *node;
- enum drm_mm_insert_mode mode;
- unsigned long lpfn;
- int ret;
- lpfn = place->lpfn;
- if (!lpfn)
- lpfn = man->size;
- node = kzalloc(sizeof(*node), GFP_KERNEL);
- if (!node)
- return -ENOMEM;
- mode = DRM_MM_INSERT_BEST;
- if (place->flags & TTM_PL_FLAG_TOPDOWN)
- mode = DRM_MM_INSERT_HIGH;
- spin_lock(&rman->lock);
- ret = drm_mm_insert_node_in_range(mm, node,
- mem->num_pages,
- mem->page_alignment, 0,
- place->fpfn, lpfn, mode);
- spin_unlock(&rman->lock);
- if (unlikely(ret)) {
- kfree(node);
- } else {
- mem->mm_node = node;
- mem->start = node->start;
- }
- return ret;
- }
- static void ttm_range_man_free(struct ttm_resource_manager *man,
- struct ttm_resource *mem)
- {
- struct ttm_range_manager *rman = to_range_manager(man);
- if (mem->mm_node) {
- spin_lock(&rman->lock);
- drm_mm_remove_node(mem->mm_node);
- spin_unlock(&rman->lock);
- kfree(mem->mm_node);
- mem->mm_node = NULL;
- }
- }
- static const struct ttm_resource_manager_func ttm_range_manager_func;
- int ttm_range_man_init(struct ttm_bo_device *bdev,
- unsigned type, bool use_tt,
- unsigned long p_size)
- {
- struct ttm_resource_manager *man;
- struct ttm_range_manager *rman;
- rman = kzalloc(sizeof(*rman), GFP_KERNEL);
- if (!rman)
- return -ENOMEM;
- man = &rman->manager;
- man->use_tt = use_tt;
- man->func = &ttm_range_manager_func;
- ttm_resource_manager_init(man, p_size);
- drm_mm_init(&rman->mm, 0, p_size);
- spin_lock_init(&rman->lock);
- ttm_set_driver_manager(bdev, type, &rman->manager);
- ttm_resource_manager_set_used(man, true);
- return 0;
- }
- EXPORT_SYMBOL(ttm_range_man_init);
- int ttm_range_man_fini(struct ttm_bo_device *bdev,
- unsigned type)
- {
- struct ttm_resource_manager *man = ttm_manager_type(bdev, type);
- struct ttm_range_manager *rman = to_range_manager(man);
- struct drm_mm *mm = &rman->mm;
- int ret;
- if (!man)
- return 0;
- ttm_resource_manager_set_used(man, false);
- ret = ttm_resource_manager_force_list_clean(bdev, man);
- if (ret)
- return ret;
- spin_lock(&rman->lock);
- drm_mm_clean(mm);
- drm_mm_takedown(mm);
- spin_unlock(&rman->lock);
- ttm_resource_manager_cleanup(man);
- ttm_set_driver_manager(bdev, type, NULL);
- kfree(rman);
- return 0;
- }
- EXPORT_SYMBOL(ttm_range_man_fini);
- static void ttm_range_man_debug(struct ttm_resource_manager *man,
- struct drm_printer *printer)
- {
- struct ttm_range_manager *rman = to_range_manager(man);
- spin_lock(&rman->lock);
- drm_mm_print(&rman->mm, printer);
- spin_unlock(&rman->lock);
- }
- static const struct ttm_resource_manager_func ttm_range_manager_func = {
- .alloc = ttm_range_man_alloc,
- .free = ttm_range_man_free,
- .debug = ttm_range_man_debug
- };
|