drm/ttm: move memory accounting into vmwgfx v4
[linux-2.6-microblaze.git] / drivers / gpu / drm / ttm / ttm_device.c
1 /* SPDX-License-Identifier: GPL-2.0 OR MIT */
2
3 /*
4  * Copyright (c) 2006-2009 VMware, Inc., Palo Alto, CA., USA
5  * Copyright 2020 Advanced Micro Devices, Inc.
6  *
7  * Permission is hereby granted, free of charge, to any person obtaining a
8  * copy of this software and associated documentation files (the "Software"),
9  * to deal in the Software without restriction, including without limitation
10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11  * and/or sell copies of the Software, and to permit persons to whom the
12  * Software is furnished to do so, subject to the following conditions:
13  *
14  * The above copyright notice and this permission notice shall be included in
15  * all copies or substantial portions of the Software.
16  *
17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
20  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
21  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
22  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
23  * OTHER DEALINGS IN THE SOFTWARE.
24  *
25  * Authors: Christian König
26  */
27
28 #define pr_fmt(fmt) "[TTM DEVICE] " fmt
29
30 #include <linux/mm.h>
31
32 #include <drm/ttm/ttm_device.h>
33 #include <drm/ttm/ttm_tt.h>
34 #include <drm/ttm/ttm_placement.h>
35 #include <drm/ttm/ttm_bo_api.h>
36
37 #include "ttm_module.h"
38
39 /**
40  * ttm_global_mutex - protecting the global state
41  */
42 DEFINE_MUTEX(ttm_global_mutex);
43 unsigned ttm_glob_use_count;
44 struct ttm_global ttm_glob;
45 EXPORT_SYMBOL(ttm_glob);
46
47 static void ttm_global_release(void)
48 {
49         struct ttm_global *glob = &ttm_glob;
50
51         mutex_lock(&ttm_global_mutex);
52         if (--ttm_glob_use_count > 0)
53                 goto out;
54
55         ttm_pool_mgr_fini();
56         ttm_tt_mgr_fini();
57
58         __free_page(glob->dummy_read_page);
59         memset(glob, 0, sizeof(*glob));
60 out:
61         mutex_unlock(&ttm_global_mutex);
62 }
63
64 static int ttm_global_init(void)
65 {
66         struct ttm_global *glob = &ttm_glob;
67         unsigned long num_pages;
68         struct sysinfo si;
69         int ret = 0;
70         unsigned i;
71
72         mutex_lock(&ttm_global_mutex);
73         if (++ttm_glob_use_count > 1)
74                 goto out;
75
76         si_meminfo(&si);
77
78         /* Limit the number of pages in the pool to about 50% of the total
79          * system memory.
80          */
81         num_pages = ((u64)si.totalram * si.mem_unit) >> PAGE_SHIFT;
82         ttm_pool_mgr_init(num_pages * 50 / 100);
83         ttm_tt_mgr_init();
84
85         spin_lock_init(&glob->lru_lock);
86         glob->dummy_read_page = alloc_page(__GFP_ZERO | GFP_DMA32);
87
88         if (unlikely(glob->dummy_read_page == NULL)) {
89                 ret = -ENOMEM;
90                 goto out;
91         }
92
93         for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i)
94                 INIT_LIST_HEAD(&glob->swap_lru[i]);
95         INIT_LIST_HEAD(&glob->device_list);
96         atomic_set(&glob->bo_count, 0);
97
98         debugfs_create_atomic_t("buffer_objects", 0444, ttm_debugfs_root,
99                                 &glob->bo_count);
100 out:
101         mutex_unlock(&ttm_global_mutex);
102         return ret;
103 }
104
105 static void ttm_init_sysman(struct ttm_device *bdev)
106 {
107         struct ttm_resource_manager *man = &bdev->sysman;
108
109         /*
110          * Initialize the system memory buffer type.
111          * Other types need to be driver / IOCTL initialized.
112          */
113         man->use_tt = true;
114
115         ttm_resource_manager_init(man, 0);
116         ttm_set_driver_manager(bdev, TTM_PL_SYSTEM, man);
117         ttm_resource_manager_set_used(man, true);
118 }
119
120 static void ttm_device_delayed_workqueue(struct work_struct *work)
121 {
122         struct ttm_device *bdev =
123                 container_of(work, struct ttm_device, wq.work);
124
125         if (!ttm_bo_delayed_delete(bdev, false))
126                 schedule_delayed_work(&bdev->wq,
127                                       ((HZ / 100) < 1) ? 1 : HZ / 100);
128 }
129
130 /**
131  * ttm_device_init
132  *
133  * @bdev: A pointer to a struct ttm_device to initialize.
134  * @funcs: Function table for the device.
135  * @dev: The core kernel device pointer for DMA mappings and allocations.
136  * @mapping: The address space to use for this bo.
137  * @vma_manager: A pointer to a vma manager.
138  * @use_dma_alloc: If coherent DMA allocation API should be used.
139  * @use_dma32: If we should use GFP_DMA32 for device memory allocations.
140  *
141  * Initializes a struct ttm_device:
142  * Returns:
143  * !0: Failure.
144  */
145 int ttm_device_init(struct ttm_device *bdev, struct ttm_device_funcs *funcs,
146                     struct device *dev, struct address_space *mapping,
147                     struct drm_vma_offset_manager *vma_manager,
148                     bool use_dma_alloc, bool use_dma32)
149 {
150         struct ttm_global *glob = &ttm_glob;
151         int ret;
152
153         if (WARN_ON(vma_manager == NULL))
154                 return -EINVAL;
155
156         ret = ttm_global_init();
157         if (ret)
158                 return ret;
159
160         bdev->funcs = funcs;
161
162         ttm_init_sysman(bdev);
163         ttm_pool_init(&bdev->pool, dev, use_dma_alloc, use_dma32);
164
165         bdev->vma_manager = vma_manager;
166         INIT_DELAYED_WORK(&bdev->wq, ttm_device_delayed_workqueue);
167         INIT_LIST_HEAD(&bdev->ddestroy);
168         bdev->dev_mapping = mapping;
169         mutex_lock(&ttm_global_mutex);
170         list_add_tail(&bdev->device_list, &glob->device_list);
171         mutex_unlock(&ttm_global_mutex);
172
173         return 0;
174 }
175 EXPORT_SYMBOL(ttm_device_init);
176
177 void ttm_device_fini(struct ttm_device *bdev)
178 {
179         struct ttm_global *glob = &ttm_glob;
180         struct ttm_resource_manager *man;
181         unsigned i;
182
183         man = ttm_manager_type(bdev, TTM_PL_SYSTEM);
184         ttm_resource_manager_set_used(man, false);
185         ttm_set_driver_manager(bdev, TTM_PL_SYSTEM, NULL);
186
187         mutex_lock(&ttm_global_mutex);
188         list_del(&bdev->device_list);
189         mutex_unlock(&ttm_global_mutex);
190
191         cancel_delayed_work_sync(&bdev->wq);
192
193         if (ttm_bo_delayed_delete(bdev, true))
194                 pr_debug("Delayed destroy list was clean\n");
195
196         spin_lock(&glob->lru_lock);
197         for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i)
198                 if (list_empty(&man->lru[0]))
199                         pr_debug("Swap list %d was clean\n", i);
200         spin_unlock(&glob->lru_lock);
201
202         ttm_pool_fini(&bdev->pool);
203         ttm_global_release();
204 }
205 EXPORT_SYMBOL(ttm_device_fini);