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1 | /************************************************************************** |
2 | * | |
3 | * Copyright © 2016 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 | #include "vmwgfx_drv.h" | |
29 | #include "vmwgfx_resource_priv.h" | |
30 | ||
31 | /** | |
32 | * struct vmw_user_simple_resource - User-space simple resource struct | |
33 | * | |
34 | * @base: The TTM base object implementing user-space visibility. | |
35 | * @account_size: How much memory was accounted for this object. | |
36 | * @simple: The embedded struct vmw_simple_resource. | |
37 | */ | |
38 | struct vmw_user_simple_resource { | |
39 | struct ttm_base_object base; | |
40 | size_t account_size; | |
41 | struct vmw_simple_resource simple; | |
42 | /* | |
43 | * Nothing to be placed after @simple, since size of @simple is | |
44 | * unknown. | |
45 | */ | |
46 | }; | |
47 | ||
48 | ||
49 | /** | |
50 | * vmw_simple_resource_init - Initialize a simple resource object. | |
51 | * | |
52 | * @dev_priv: Pointer to a struct device private. | |
53 | * @simple: The struct vmw_simple_resource to initialize. | |
54 | * @data: Data passed to the information initialization function. | |
55 | * @res_free: Function pointer to destroy the simple resource. | |
56 | * | |
57 | * Returns: | |
58 | * 0 if succeeded. | |
59 | * Negative error value if error, in which case the resource will have been | |
60 | * freed. | |
61 | */ | |
62 | static int vmw_simple_resource_init(struct vmw_private *dev_priv, | |
63 | struct vmw_simple_resource *simple, | |
64 | void *data, | |
65 | void (*res_free)(struct vmw_resource *res)) | |
66 | { | |
67 | struct vmw_resource *res = &simple->res; | |
68 | int ret; | |
69 | ||
70 | ret = vmw_resource_init(dev_priv, res, false, res_free, | |
71 | &simple->func->res_func); | |
72 | ||
73 | if (ret) { | |
74 | res_free(res); | |
75 | return ret; | |
76 | } | |
77 | ||
78 | ret = simple->func->init(res, data); | |
79 | if (ret) { | |
80 | vmw_resource_unreference(&res); | |
81 | return ret; | |
82 | } | |
83 | ||
84 | vmw_resource_activate(&simple->res, simple->func->hw_destroy); | |
85 | ||
86 | return 0; | |
87 | } | |
88 | ||
89 | /** | |
90 | * vmw_simple_resource_free - Free a simple resource object. | |
91 | * | |
92 | * @res: The struct vmw_resource member of the simple resource object. | |
93 | * | |
94 | * Frees memory and memory accounting for the object. | |
95 | */ | |
96 | static void vmw_simple_resource_free(struct vmw_resource *res) | |
97 | { | |
98 | struct vmw_user_simple_resource *usimple = | |
99 | container_of(res, struct vmw_user_simple_resource, | |
100 | simple.res); | |
101 | struct vmw_private *dev_priv = res->dev_priv; | |
102 | size_t size = usimple->account_size; | |
103 | ||
104 | ttm_base_object_kfree(usimple, base); | |
105 | ttm_mem_global_free(vmw_mem_glob(dev_priv), size); | |
106 | } | |
107 | ||
108 | /** | |
109 | * vmw_simple_resource_base_release - TTM object release callback | |
110 | * | |
111 | * @p_base: The struct ttm_base_object member of the simple resource object. | |
112 | * | |
113 | * Called when the last reference to the embedded struct ttm_base_object is | |
114 | * gone. Typically results in an object free, unless there are other | |
115 | * references to the embedded struct vmw_resource. | |
116 | */ | |
117 | static void vmw_simple_resource_base_release(struct ttm_base_object **p_base) | |
118 | { | |
119 | struct ttm_base_object *base = *p_base; | |
120 | struct vmw_user_simple_resource *usimple = | |
121 | container_of(base, struct vmw_user_simple_resource, base); | |
122 | struct vmw_resource *res = &usimple->simple.res; | |
123 | ||
124 | *p_base = NULL; | |
125 | vmw_resource_unreference(&res); | |
126 | } | |
127 | ||
128 | /** | |
129 | * vmw_simple_resource_create_ioctl - Helper to set up an ioctl function to | |
130 | * create a struct vmw_simple_resource. | |
131 | * | |
132 | * @dev: Pointer to a struct drm device. | |
133 | * @data: Ioctl argument. | |
134 | * @file_priv: Pointer to a struct drm_file identifying the caller. | |
135 | * @func: Pointer to a struct vmw_simple_resource_func identifying the | |
136 | * simple resource type. | |
137 | * | |
138 | * Returns: | |
139 | * 0 if success, | |
140 | * Negative error value on error. | |
141 | */ | |
142 | int | |
143 | vmw_simple_resource_create_ioctl(struct drm_device *dev, void *data, | |
144 | struct drm_file *file_priv, | |
145 | const struct vmw_simple_resource_func *func) | |
146 | { | |
147 | struct vmw_private *dev_priv = vmw_priv(dev); | |
148 | struct vmw_user_simple_resource *usimple; | |
149 | struct vmw_resource *res; | |
150 | struct vmw_resource *tmp; | |
151 | struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile; | |
279c01f6 RH |
152 | struct ttm_operation_ctx ctx = { |
153 | .interruptible = true, | |
154 | .no_wait_gpu = false | |
155 | }; | |
d4d21902 TH |
156 | size_t alloc_size; |
157 | size_t account_size; | |
158 | int ret; | |
159 | ||
160 | alloc_size = offsetof(struct vmw_user_simple_resource, simple) + | |
161 | func->size; | |
162 | account_size = ttm_round_pot(alloc_size) + VMW_IDA_ACC_SIZE; | |
163 | ||
164 | ret = ttm_read_lock(&dev_priv->reservation_sem, true); | |
165 | if (ret) | |
166 | return ret; | |
167 | ||
168 | ret = ttm_mem_global_alloc(vmw_mem_glob(dev_priv), account_size, | |
279c01f6 | 169 | &ctx); |
d4d21902 TH |
170 | ttm_read_unlock(&dev_priv->reservation_sem); |
171 | if (ret) { | |
172 | if (ret != -ERESTARTSYS) | |
173 | DRM_ERROR("Out of graphics memory for %s" | |
174 | " creation.\n", func->res_func.type_name); | |
175 | ||
176 | goto out_ret; | |
177 | } | |
178 | ||
179 | usimple = kzalloc(alloc_size, GFP_KERNEL); | |
180 | if (!usimple) { | |
181 | ttm_mem_global_free(vmw_mem_glob(dev_priv), | |
182 | account_size); | |
183 | ret = -ENOMEM; | |
184 | goto out_ret; | |
185 | } | |
186 | ||
187 | usimple->simple.func = func; | |
188 | usimple->account_size = account_size; | |
189 | res = &usimple->simple.res; | |
190 | usimple->base.shareable = false; | |
191 | usimple->base.tfile = NULL; | |
192 | ||
193 | /* | |
194 | * From here on, the destructor takes over resource freeing. | |
195 | */ | |
196 | ret = vmw_simple_resource_init(dev_priv, &usimple->simple, | |
197 | data, vmw_simple_resource_free); | |
198 | if (ret) | |
199 | goto out_ret; | |
200 | ||
201 | tmp = vmw_resource_reference(res); | |
202 | ret = ttm_base_object_init(tfile, &usimple->base, false, | |
203 | func->ttm_res_type, | |
204 | &vmw_simple_resource_base_release, NULL); | |
205 | ||
206 | if (ret) { | |
207 | vmw_resource_unreference(&tmp); | |
208 | goto out_err; | |
209 | } | |
210 | ||
211 | func->set_arg_handle(data, usimple->base.hash.key); | |
212 | out_err: | |
213 | vmw_resource_unreference(&res); | |
214 | out_ret: | |
215 | return ret; | |
216 | } | |
217 | ||
218 | /** | |
219 | * vmw_simple_resource_lookup - Look up a simple resource from its user-space | |
220 | * handle. | |
221 | * | |
222 | * @tfile: struct ttm_object_file identifying the caller. | |
223 | * @handle: The user-space handle. | |
224 | * @func: The struct vmw_simple_resource_func identifying the simple resource | |
225 | * type. | |
226 | * | |
227 | * Returns: Refcounted pointer to the embedded struct vmw_resource if | |
228 | * successfule. Error pointer otherwise. | |
229 | */ | |
230 | struct vmw_resource * | |
231 | vmw_simple_resource_lookup(struct ttm_object_file *tfile, | |
232 | uint32_t handle, | |
233 | const struct vmw_simple_resource_func *func) | |
234 | { | |
235 | struct vmw_user_simple_resource *usimple; | |
236 | struct ttm_base_object *base; | |
237 | struct vmw_resource *res; | |
238 | ||
239 | base = ttm_base_object_lookup(tfile, handle); | |
240 | if (!base) { | |
241 | DRM_ERROR("Invalid %s handle 0x%08lx.\n", | |
242 | func->res_func.type_name, | |
243 | (unsigned long) handle); | |
244 | return ERR_PTR(-ESRCH); | |
245 | } | |
246 | ||
247 | if (ttm_base_object_type(base) != func->ttm_res_type) { | |
248 | ttm_base_object_unref(&base); | |
249 | DRM_ERROR("Invalid type of %s handle 0x%08lx.\n", | |
250 | func->res_func.type_name, | |
251 | (unsigned long) handle); | |
252 | return ERR_PTR(-EINVAL); | |
253 | } | |
254 | ||
255 | usimple = container_of(base, typeof(*usimple), base); | |
256 | res = vmw_resource_reference(&usimple->simple.res); | |
257 | ttm_base_object_unref(&base); | |
258 | ||
259 | return res; | |
260 | } |