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1/**************************************************************************
2 *
3 * Copyright (c) 2007-2010 VMware, Inc., Palo Alto, CA., USA
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
16 * of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
21 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
22 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
23 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
24 * USE OR OTHER DEALINGS IN THE SOFTWARE.
25 *
26 **************************************************************************/
27/*
28 * Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
29 */
30
31#include "vmwgfx_drv.h"
32#include <drm/ttm/ttm_module.h>
33#include <drm/ttm/ttm_bo_driver.h>
34#include <drm/ttm/ttm_placement.h>
35#include <linux/idr.h>
36#include <linux/spinlock.h>
37#include <linux/kernel.h>
38
39struct vmwgfx_gmrid_man {
40 spinlock_t lock;
41 struct ida gmr_ida;
42 uint32_t max_gmr_ids;
43 uint32_t max_gmr_pages;
44 uint32_t used_gmr_pages;
45};
46
47static int vmw_gmrid_man_get_node(struct ttm_mem_type_manager *man,
48 struct ttm_buffer_object *bo,
49 const struct ttm_place *place,
50 struct ttm_mem_reg *mem)
51{
52 struct vmwgfx_gmrid_man *gman =
53 (struct vmwgfx_gmrid_man *)man->priv;
54 int ret = 0;
55 int id;
56
57 mem->mm_node = NULL;
58
59 spin_lock(&gman->lock);
60
61 if (gman->max_gmr_pages > 0) {
62 gman->used_gmr_pages += bo->num_pages;
63 if (unlikely(gman->used_gmr_pages > gman->max_gmr_pages))
64 goto out_err_locked;
65 }
66
67 do {
68 spin_unlock(&gman->lock);
69 if (unlikely(ida_pre_get(&gman->gmr_ida, GFP_KERNEL) == 0)) {
70 ret = -ENOMEM;
71 goto out_err;
72 }
73 spin_lock(&gman->lock);
74
75 ret = ida_get_new(&gman->gmr_ida, &id);
76 if (unlikely(ret == 0 && id >= gman->max_gmr_ids)) {
77 ida_remove(&gman->gmr_ida, id);
78 ret = 0;
79 goto out_err_locked;
80 }
81 } while (ret == -EAGAIN);
82
83 if (likely(ret == 0)) {
84 mem->mm_node = gman;
85 mem->start = id;
86 mem->num_pages = bo->num_pages;
87 } else
88 goto out_err_locked;
89
90 spin_unlock(&gman->lock);
91 return 0;
92
93out_err:
94 spin_lock(&gman->lock);
95out_err_locked:
96 gman->used_gmr_pages -= bo->num_pages;
97 spin_unlock(&gman->lock);
98 return ret;
99}
100
101static void vmw_gmrid_man_put_node(struct ttm_mem_type_manager *man,
102 struct ttm_mem_reg *mem)
103{
104 struct vmwgfx_gmrid_man *gman =
105 (struct vmwgfx_gmrid_man *)man->priv;
106
107 if (mem->mm_node) {
108 spin_lock(&gman->lock);
109 ida_remove(&gman->gmr_ida, mem->start);
110 gman->used_gmr_pages -= mem->num_pages;
111 spin_unlock(&gman->lock);
112 mem->mm_node = NULL;
113 }
114}
115
116static int vmw_gmrid_man_init(struct ttm_mem_type_manager *man,
117 unsigned long p_size)
118{
119 struct vmw_private *dev_priv =
120 container_of(man->bdev, struct vmw_private, bdev);
121 struct vmwgfx_gmrid_man *gman =
122 kzalloc(sizeof(*gman), GFP_KERNEL);
123
124 if (unlikely(gman == NULL))
125 return -ENOMEM;
126
127 spin_lock_init(&gman->lock);
128 gman->used_gmr_pages = 0;
129 ida_init(&gman->gmr_ida);
130
131 switch (p_size) {
132 case VMW_PL_GMR:
133 gman->max_gmr_ids = dev_priv->max_gmr_ids;
134 gman->max_gmr_pages = dev_priv->max_gmr_pages;
135 break;
136 case VMW_PL_MOB:
137 gman->max_gmr_ids = VMWGFX_NUM_MOB;
138 gman->max_gmr_pages = dev_priv->max_mob_pages;
139 break;
140 default:
141 BUG();
142 }
143 man->priv = (void *) gman;
144 return 0;
145}
146
147static int vmw_gmrid_man_takedown(struct ttm_mem_type_manager *man)
148{
149 struct vmwgfx_gmrid_man *gman =
150 (struct vmwgfx_gmrid_man *)man->priv;
151
152 if (gman) {
153 ida_destroy(&gman->gmr_ida);
154 kfree(gman);
155 }
156 return 0;
157}
158
159static void vmw_gmrid_man_debug(struct ttm_mem_type_manager *man,
160 const char *prefix)
161{
162 printk(KERN_INFO "%s: No debug info available for the GMR "
163 "id manager.\n", prefix);
164}
165
166const struct ttm_mem_type_manager_func vmw_gmrid_manager_func = {
167 vmw_gmrid_man_init,
168 vmw_gmrid_man_takedown,
169 vmw_gmrid_man_get_node,
170 vmw_gmrid_man_put_node,
171 vmw_gmrid_man_debug
172};
1// SPDX-License-Identifier: GPL-2.0 OR MIT
2/**************************************************************************
3 *
4 * Copyright 2007-2010 VMware, Inc., Palo Alto, CA., USA
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
16 * of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
21 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
22 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
23 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
24 * USE OR OTHER DEALINGS IN THE SOFTWARE.
25 *
26 **************************************************************************/
27/*
28 * Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
29 */
30
31#include "vmwgfx_drv.h"
32#include <drm/ttm/ttm_module.h>
33#include <drm/ttm/ttm_bo_driver.h>
34#include <drm/ttm/ttm_placement.h>
35#include <linux/idr.h>
36#include <linux/spinlock.h>
37#include <linux/kernel.h>
38
39struct vmwgfx_gmrid_man {
40 spinlock_t lock;
41 struct ida gmr_ida;
42 uint32_t max_gmr_ids;
43 uint32_t max_gmr_pages;
44 uint32_t used_gmr_pages;
45};
46
47static int vmw_gmrid_man_get_node(struct ttm_mem_type_manager *man,
48 struct ttm_buffer_object *bo,
49 const struct ttm_place *place,
50 struct ttm_mem_reg *mem)
51{
52 struct vmwgfx_gmrid_man *gman =
53 (struct vmwgfx_gmrid_man *)man->priv;
54 int id;
55
56 id = ida_alloc_max(&gman->gmr_ida, gman->max_gmr_ids - 1, GFP_KERNEL);
57 if (id < 0)
58 return id;
59
60 spin_lock(&gman->lock);
61
62 if (gman->max_gmr_pages > 0) {
63 gman->used_gmr_pages += bo->num_pages;
64 if (unlikely(gman->used_gmr_pages > gman->max_gmr_pages))
65 goto nospace;
66 }
67
68 mem->mm_node = gman;
69 mem->start = id;
70 mem->num_pages = bo->num_pages;
71
72 spin_unlock(&gman->lock);
73 return 0;
74
75nospace:
76 gman->used_gmr_pages -= bo->num_pages;
77 spin_unlock(&gman->lock);
78 ida_free(&gman->gmr_ida, id);
79 return -ENOSPC;
80}
81
82static void vmw_gmrid_man_put_node(struct ttm_mem_type_manager *man,
83 struct ttm_mem_reg *mem)
84{
85 struct vmwgfx_gmrid_man *gman =
86 (struct vmwgfx_gmrid_man *)man->priv;
87
88 if (mem->mm_node) {
89 ida_free(&gman->gmr_ida, mem->start);
90 spin_lock(&gman->lock);
91 gman->used_gmr_pages -= mem->num_pages;
92 spin_unlock(&gman->lock);
93 mem->mm_node = NULL;
94 }
95}
96
97static int vmw_gmrid_man_init(struct ttm_mem_type_manager *man,
98 unsigned long p_size)
99{
100 struct vmw_private *dev_priv =
101 container_of(man->bdev, struct vmw_private, bdev);
102 struct vmwgfx_gmrid_man *gman =
103 kzalloc(sizeof(*gman), GFP_KERNEL);
104
105 if (unlikely(!gman))
106 return -ENOMEM;
107
108 spin_lock_init(&gman->lock);
109 gman->used_gmr_pages = 0;
110 ida_init(&gman->gmr_ida);
111
112 switch (p_size) {
113 case VMW_PL_GMR:
114 gman->max_gmr_ids = dev_priv->max_gmr_ids;
115 gman->max_gmr_pages = dev_priv->max_gmr_pages;
116 break;
117 case VMW_PL_MOB:
118 gman->max_gmr_ids = VMWGFX_NUM_MOB;
119 gman->max_gmr_pages = dev_priv->max_mob_pages;
120 break;
121 default:
122 BUG();
123 }
124 man->priv = (void *) gman;
125 return 0;
126}
127
128static int vmw_gmrid_man_takedown(struct ttm_mem_type_manager *man)
129{
130 struct vmwgfx_gmrid_man *gman =
131 (struct vmwgfx_gmrid_man *)man->priv;
132
133 if (gman) {
134 ida_destroy(&gman->gmr_ida);
135 kfree(gman);
136 }
137 return 0;
138}
139
140static void vmw_gmrid_man_debug(struct ttm_mem_type_manager *man,
141 struct drm_printer *printer)
142{
143 drm_printf(printer, "No debug info available for the GMR id manager\n");
144}
145
146const struct ttm_mem_type_manager_func vmw_gmrid_manager_func = {
147 .init = vmw_gmrid_man_init,
148 .takedown = vmw_gmrid_man_takedown,
149 .get_node = vmw_gmrid_man_get_node,
150 .put_node = vmw_gmrid_man_put_node,
151 .debug = vmw_gmrid_man_debug
152};