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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, | |
f1217ed0 | 49 | const struct ttm_place *place, |
135cba0d TH |
50 | struct ttm_mem_reg *mem) |
51 | { | |
52 | struct vmwgfx_gmrid_man *gman = | |
53 | (struct vmwgfx_gmrid_man *)man->priv; | |
fb17f189 | 54 | int ret = 0; |
135cba0d TH |
55 | int id; |
56 | ||
57 | mem->mm_node = NULL; | |
58 | ||
fb17f189 TH |
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 | } | |
135cba0d | 66 | |
fb17f189 TH |
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 | } | |
135cba0d | 73 | spin_lock(&gman->lock); |
135cba0d | 74 | |
fb17f189 | 75 | ret = ida_get_new(&gman->gmr_ida, &id); |
135cba0d TH |
76 | if (unlikely(ret == 0 && id >= gman->max_gmr_ids)) { |
77 | ida_remove(&gman->gmr_ida, id); | |
fb17f189 TH |
78 | ret = 0; |
79 | goto out_err_locked; | |
135cba0d | 80 | } |
135cba0d TH |
81 | } while (ret == -EAGAIN); |
82 | ||
83 | if (likely(ret == 0)) { | |
84 | mem->mm_node = gman; | |
85 | mem->start = id; | |
fb17f189 TH |
86 | mem->num_pages = bo->num_pages; |
87 | } else | |
88 | goto out_err_locked; | |
89 | ||
90 | spin_unlock(&gman->lock); | |
91 | return 0; | |
135cba0d | 92 | |
fb17f189 TH |
93 | out_err: |
94 | spin_lock(&gman->lock); | |
95 | out_err_locked: | |
96 | gman->used_gmr_pages -= bo->num_pages; | |
97 | spin_unlock(&gman->lock); | |
135cba0d TH |
98 | return ret; |
99 | } | |
100 | ||
101 | static 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); | |
fb17f189 | 110 | gman->used_gmr_pages -= mem->num_pages; |
135cba0d TH |
111 | spin_unlock(&gman->lock); |
112 | mem->mm_node = NULL; | |
113 | } | |
114 | } | |
115 | ||
116 | static int vmw_gmrid_man_init(struct ttm_mem_type_manager *man, | |
117 | unsigned long p_size) | |
118 | { | |
fb17f189 TH |
119 | struct vmw_private *dev_priv = |
120 | container_of(man->bdev, struct vmw_private, bdev); | |
135cba0d TH |
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); | |
fb17f189 | 128 | gman->used_gmr_pages = 0; |
135cba0d | 129 | ida_init(&gman->gmr_ida); |
6da768aa TH |
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 | } | |
135cba0d TH |
143 | man->priv = (void *) gman; |
144 | return 0; | |
145 | } | |
146 | ||
147 | static 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 | ||
159 | static 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 | ||
166 | const struct ttm_mem_type_manager_func vmw_gmrid_manager_func = { | |
5ca16d8e KC |
167 | .init = vmw_gmrid_man_init, |
168 | .takedown = vmw_gmrid_man_takedown, | |
169 | .get_node = vmw_gmrid_man_get_node, | |
170 | .put_node = vmw_gmrid_man_put_node, | |
171 | .debug = vmw_gmrid_man_debug | |
135cba0d | 172 | }; |