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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 "ttm/ttm_module.h"
33#include "ttm/ttm_bo_driver.h"
34#include "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};
44
45static int vmw_gmrid_man_get_node(struct ttm_mem_type_manager *man,
46 struct ttm_buffer_object *bo,
47 struct ttm_placement *placement,
48 struct ttm_mem_reg *mem)
49{
50 struct vmwgfx_gmrid_man *gman =
51 (struct vmwgfx_gmrid_man *)man->priv;
52 int ret;
53 int id;
54
55 mem->mm_node = NULL;
56
57 do {
58 if (unlikely(ida_pre_get(&gman->gmr_ida, GFP_KERNEL) == 0))
59 return -ENOMEM;
60
61 spin_lock(&gman->lock);
62 ret = ida_get_new(&gman->gmr_ida, &id);
63
64 if (unlikely(ret == 0 && id >= gman->max_gmr_ids)) {
65 ida_remove(&gman->gmr_ida, id);
66 spin_unlock(&gman->lock);
67 return 0;
68 }
69
70 spin_unlock(&gman->lock);
71
72 } while (ret == -EAGAIN);
73
74 if (likely(ret == 0)) {
75 mem->mm_node = gman;
76 mem->start = id;
77 }
78
79 return ret;
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 spin_lock(&gman->lock);
90 ida_remove(&gman->gmr_ida, mem->start);
91 spin_unlock(&gman->lock);
92 mem->mm_node = NULL;
93 }
94}
95
96static int vmw_gmrid_man_init(struct ttm_mem_type_manager *man,
97 unsigned long p_size)
98{
99 struct vmwgfx_gmrid_man *gman =
100 kzalloc(sizeof(*gman), GFP_KERNEL);
101
102 if (unlikely(gman == NULL))
103 return -ENOMEM;
104
105 spin_lock_init(&gman->lock);
106 ida_init(&gman->gmr_ida);
107 gman->max_gmr_ids = p_size;
108 man->priv = (void *) gman;
109 return 0;
110}
111
112static int vmw_gmrid_man_takedown(struct ttm_mem_type_manager *man)
113{
114 struct vmwgfx_gmrid_man *gman =
115 (struct vmwgfx_gmrid_man *)man->priv;
116
117 if (gman) {
118 ida_destroy(&gman->gmr_ida);
119 kfree(gman);
120 }
121 return 0;
122}
123
124static void vmw_gmrid_man_debug(struct ttm_mem_type_manager *man,
125 const char *prefix)
126{
127 printk(KERN_INFO "%s: No debug info available for the GMR "
128 "id manager.\n", prefix);
129}
130
131const struct ttm_mem_type_manager_func vmw_gmrid_manager_func = {
132 vmw_gmrid_man_init,
133 vmw_gmrid_man_takedown,
134 vmw_gmrid_man_get_node,
135 vmw_gmrid_man_put_node,
136 vmw_gmrid_man_debug
137};
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 mem->mm_node = NULL;
57
58 id = ida_alloc_max(&gman->gmr_ida, gman->max_gmr_ids - 1, GFP_KERNEL);
59 if (id < 0)
60 return (id != -ENOMEM ? 0 : id);
61
62 spin_lock(&gman->lock);
63
64 if (gman->max_gmr_pages > 0) {
65 gman->used_gmr_pages += bo->num_pages;
66 if (unlikely(gman->used_gmr_pages > gman->max_gmr_pages))
67 goto nospace;
68 }
69
70 mem->mm_node = gman;
71 mem->start = id;
72 mem->num_pages = bo->num_pages;
73
74 spin_unlock(&gman->lock);
75 return 0;
76
77nospace:
78 gman->used_gmr_pages -= bo->num_pages;
79 spin_unlock(&gman->lock);
80 ida_free(&gman->gmr_ida, id);
81 return 0;
82}
83
84static void vmw_gmrid_man_put_node(struct ttm_mem_type_manager *man,
85 struct ttm_mem_reg *mem)
86{
87 struct vmwgfx_gmrid_man *gman =
88 (struct vmwgfx_gmrid_man *)man->priv;
89
90 if (mem->mm_node) {
91 ida_free(&gman->gmr_ida, mem->start);
92 spin_lock(&gman->lock);
93 gman->used_gmr_pages -= mem->num_pages;
94 spin_unlock(&gman->lock);
95 mem->mm_node = NULL;
96 }
97}
98
99static int vmw_gmrid_man_init(struct ttm_mem_type_manager *man,
100 unsigned long p_size)
101{
102 struct vmw_private *dev_priv =
103 container_of(man->bdev, struct vmw_private, bdev);
104 struct vmwgfx_gmrid_man *gman =
105 kzalloc(sizeof(*gman), GFP_KERNEL);
106
107 if (unlikely(!gman))
108 return -ENOMEM;
109
110 spin_lock_init(&gman->lock);
111 gman->used_gmr_pages = 0;
112 ida_init(&gman->gmr_ida);
113
114 switch (p_size) {
115 case VMW_PL_GMR:
116 gman->max_gmr_ids = dev_priv->max_gmr_ids;
117 gman->max_gmr_pages = dev_priv->max_gmr_pages;
118 break;
119 case VMW_PL_MOB:
120 gman->max_gmr_ids = VMWGFX_NUM_MOB;
121 gman->max_gmr_pages = dev_priv->max_mob_pages;
122 break;
123 default:
124 BUG();
125 }
126 man->priv = (void *) gman;
127 return 0;
128}
129
130static int vmw_gmrid_man_takedown(struct ttm_mem_type_manager *man)
131{
132 struct vmwgfx_gmrid_man *gman =
133 (struct vmwgfx_gmrid_man *)man->priv;
134
135 if (gman) {
136 ida_destroy(&gman->gmr_ida);
137 kfree(gman);
138 }
139 return 0;
140}
141
142static void vmw_gmrid_man_debug(struct ttm_mem_type_manager *man,
143 struct drm_printer *printer)
144{
145 drm_printf(printer, "No debug info available for the GMR id manager\n");
146}
147
148const struct ttm_mem_type_manager_func vmw_gmrid_manager_func = {
149 .init = vmw_gmrid_man_init,
150 .takedown = vmw_gmrid_man_takedown,
151 .get_node = vmw_gmrid_man_get_node,
152 .put_node = vmw_gmrid_man_put_node,
153 .debug = vmw_gmrid_man_debug
154};