Commit | Line | Data |
---|---|---|
135cba0d TH |
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" | |
760285e7 DH |
32 | #include <drm/ttm/ttm_module.h> |
33 | #include <drm/ttm/ttm_bo_driver.h> | |
34 | #include <drm/ttm/ttm_placement.h> | |
135cba0d TH |
35 | #include <linux/idr.h> |
36 | #include <linux/spinlock.h> | |
37 | #include <linux/kernel.h> | |
38 | ||
39 | struct vmwgfx_gmrid_man { | |
40 | spinlock_t lock; | |
41 | struct ida gmr_ida; | |
42 | uint32_t max_gmr_ids; | |
fb17f189 TH |
43 | uint32_t max_gmr_pages; |
44 | uint32_t used_gmr_pages; | |
135cba0d TH |
45 | }; |
46 | ||
47 | static int vmw_gmrid_man_get_node(struct ttm_mem_type_manager *man, | |
48 | struct ttm_buffer_object *bo, | |
49 | struct ttm_placement *placement, | |
e3f20279 | 50 | uint32_t flags, |
135cba0d TH |
51 | struct ttm_mem_reg *mem) |
52 | { | |
53 | struct vmwgfx_gmrid_man *gman = | |
54 | (struct vmwgfx_gmrid_man *)man->priv; | |
fb17f189 | 55 | int ret = 0; |
135cba0d TH |
56 | int id; |
57 | ||
58 | mem->mm_node = NULL; | |
59 | ||
fb17f189 TH |
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 out_err_locked; | |
66 | } | |
135cba0d | 67 | |
fb17f189 TH |
68 | do { |
69 | spin_unlock(&gman->lock); | |
70 | if (unlikely(ida_pre_get(&gman->gmr_ida, GFP_KERNEL) == 0)) { | |
71 | ret = -ENOMEM; | |
72 | goto out_err; | |
73 | } | |
135cba0d | 74 | spin_lock(&gman->lock); |
135cba0d | 75 | |
fb17f189 | 76 | ret = ida_get_new(&gman->gmr_ida, &id); |
135cba0d TH |
77 | if (unlikely(ret == 0 && id >= gman->max_gmr_ids)) { |
78 | ida_remove(&gman->gmr_ida, id); | |
fb17f189 TH |
79 | ret = 0; |
80 | goto out_err_locked; | |
135cba0d | 81 | } |
135cba0d TH |
82 | } while (ret == -EAGAIN); |
83 | ||
84 | if (likely(ret == 0)) { | |
85 | mem->mm_node = gman; | |
86 | mem->start = id; | |
fb17f189 TH |
87 | mem->num_pages = bo->num_pages; |
88 | } else | |
89 | goto out_err_locked; | |
90 | ||
91 | spin_unlock(&gman->lock); | |
92 | return 0; | |
135cba0d | 93 | |
fb17f189 TH |
94 | out_err: |
95 | spin_lock(&gman->lock); | |
96 | out_err_locked: | |
97 | gman->used_gmr_pages -= bo->num_pages; | |
98 | spin_unlock(&gman->lock); | |
135cba0d TH |
99 | return ret; |
100 | } | |
101 | ||
102 | static void vmw_gmrid_man_put_node(struct ttm_mem_type_manager *man, | |
103 | struct ttm_mem_reg *mem) | |
104 | { | |
105 | struct vmwgfx_gmrid_man *gman = | |
106 | (struct vmwgfx_gmrid_man *)man->priv; | |
107 | ||
108 | if (mem->mm_node) { | |
109 | spin_lock(&gman->lock); | |
110 | ida_remove(&gman->gmr_ida, mem->start); | |
fb17f189 | 111 | gman->used_gmr_pages -= mem->num_pages; |
135cba0d TH |
112 | spin_unlock(&gman->lock); |
113 | mem->mm_node = NULL; | |
114 | } | |
115 | } | |
116 | ||
117 | static int vmw_gmrid_man_init(struct ttm_mem_type_manager *man, | |
118 | unsigned long p_size) | |
119 | { | |
fb17f189 TH |
120 | struct vmw_private *dev_priv = |
121 | container_of(man->bdev, struct vmw_private, bdev); | |
135cba0d TH |
122 | struct vmwgfx_gmrid_man *gman = |
123 | kzalloc(sizeof(*gman), GFP_KERNEL); | |
124 | ||
125 | if (unlikely(gman == NULL)) | |
126 | return -ENOMEM; | |
127 | ||
128 | spin_lock_init(&gman->lock); | |
fb17f189 | 129 | gman->used_gmr_pages = 0; |
135cba0d | 130 | ida_init(&gman->gmr_ida); |
6da768aa TH |
131 | |
132 | switch (p_size) { | |
133 | case VMW_PL_GMR: | |
134 | gman->max_gmr_ids = dev_priv->max_gmr_ids; | |
135 | gman->max_gmr_pages = dev_priv->max_gmr_pages; | |
136 | break; | |
137 | case VMW_PL_MOB: | |
138 | gman->max_gmr_ids = VMWGFX_NUM_MOB; | |
139 | gman->max_gmr_pages = dev_priv->max_mob_pages; | |
140 | break; | |
141 | default: | |
142 | BUG(); | |
143 | } | |
135cba0d TH |
144 | man->priv = (void *) gman; |
145 | return 0; | |
146 | } | |
147 | ||
148 | static int vmw_gmrid_man_takedown(struct ttm_mem_type_manager *man) | |
149 | { | |
150 | struct vmwgfx_gmrid_man *gman = | |
151 | (struct vmwgfx_gmrid_man *)man->priv; | |
152 | ||
153 | if (gman) { | |
154 | ida_destroy(&gman->gmr_ida); | |
155 | kfree(gman); | |
156 | } | |
157 | return 0; | |
158 | } | |
159 | ||
160 | static void vmw_gmrid_man_debug(struct ttm_mem_type_manager *man, | |
161 | const char *prefix) | |
162 | { | |
163 | printk(KERN_INFO "%s: No debug info available for the GMR " | |
164 | "id manager.\n", prefix); | |
165 | } | |
166 | ||
167 | const struct ttm_mem_type_manager_func vmw_gmrid_manager_func = { | |
168 | vmw_gmrid_man_init, | |
169 | vmw_gmrid_man_takedown, | |
170 | vmw_gmrid_man_get_node, | |
171 | vmw_gmrid_man_put_node, | |
172 | vmw_gmrid_man_debug | |
173 | }; |