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1 | /************************************************************************** |
2 | * | |
3 | * Copyright © 2014 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 | ||
30 | #define VMW_CMDBUF_RES_MAN_HT_ORDER 12 | |
31 | ||
32 | enum vmw_cmdbuf_res_state { | |
33 | VMW_CMDBUF_RES_COMMITED, | |
34 | VMW_CMDBUF_RES_ADD, | |
35 | VMW_CMDBUF_RES_DEL | |
36 | }; | |
37 | ||
38 | /** | |
39 | * struct vmw_cmdbuf_res - Command buffer managed resource entry. | |
40 | * | |
41 | * @res: Refcounted pointer to a struct vmw_resource. | |
42 | * @hash: Hash entry for the manager hash table. | |
43 | * @head: List head used either by the staging list or the manager list | |
44 | * of commited resources. | |
45 | * @state: Staging state of this resource entry. | |
46 | * @man: Pointer to a resource manager for this entry. | |
47 | */ | |
48 | struct vmw_cmdbuf_res { | |
49 | struct vmw_resource *res; | |
50 | struct drm_hash_item hash; | |
51 | struct list_head head; | |
52 | enum vmw_cmdbuf_res_state state; | |
53 | struct vmw_cmdbuf_res_manager *man; | |
54 | }; | |
55 | ||
56 | /** | |
57 | * struct vmw_cmdbuf_res_manager - Command buffer resource manager. | |
58 | * | |
59 | * @resources: Hash table containing staged and commited command buffer | |
60 | * resources | |
61 | * @list: List of commited command buffer resources. | |
62 | * @dev_priv: Pointer to a device private structure. | |
63 | * | |
64 | * @resources and @list are protected by the cmdbuf mutex for now. | |
65 | */ | |
66 | struct vmw_cmdbuf_res_manager { | |
67 | struct drm_open_hash resources; | |
68 | struct list_head list; | |
69 | struct vmw_private *dev_priv; | |
70 | }; | |
71 | ||
72 | ||
73 | /** | |
74 | * vmw_cmdbuf_res_lookup - Look up a command buffer resource | |
75 | * | |
76 | * @man: Pointer to the command buffer resource manager | |
77 | * @resource_type: The resource type, that combined with the user key | |
78 | * identifies the resource. | |
79 | * @user_key: The user key. | |
80 | * | |
81 | * Returns a valid refcounted struct vmw_resource pointer on success, | |
82 | * an error pointer on failure. | |
83 | */ | |
84 | struct vmw_resource * | |
85 | vmw_cmdbuf_res_lookup(struct vmw_cmdbuf_res_manager *man, | |
86 | enum vmw_cmdbuf_res_type res_type, | |
87 | u32 user_key) | |
88 | { | |
89 | struct drm_hash_item *hash; | |
90 | int ret; | |
91 | unsigned long key = user_key | (res_type << 24); | |
92 | ||
93 | ret = drm_ht_find_item(&man->resources, key, &hash); | |
94 | if (unlikely(ret != 0)) | |
95 | return ERR_PTR(ret); | |
96 | ||
97 | return vmw_resource_reference | |
98 | (drm_hash_entry(hash, struct vmw_cmdbuf_res, hash)->res); | |
99 | } | |
100 | ||
101 | /** | |
102 | * vmw_cmdbuf_res_free - Free a command buffer resource. | |
103 | * | |
104 | * @man: Pointer to the command buffer resource manager | |
105 | * @entry: Pointer to a struct vmw_cmdbuf_res. | |
106 | * | |
107 | * Frees a struct vmw_cmdbuf_res entry and drops its reference to the | |
108 | * struct vmw_resource. | |
109 | */ | |
110 | static void vmw_cmdbuf_res_free(struct vmw_cmdbuf_res_manager *man, | |
111 | struct vmw_cmdbuf_res *entry) | |
112 | { | |
113 | list_del(&entry->head); | |
114 | WARN_ON(drm_ht_remove_item(&man->resources, &entry->hash)); | |
115 | vmw_resource_unreference(&entry->res); | |
116 | kfree(entry); | |
117 | } | |
118 | ||
119 | /** | |
120 | * vmw_cmdbuf_res_commit - Commit a list of command buffer resource actions | |
121 | * | |
122 | * @list: Caller's list of command buffer resource actions. | |
123 | * | |
124 | * This function commits a list of command buffer resource | |
125 | * additions or removals. | |
126 | * It is typically called when the execbuf ioctl call triggering these | |
127 | * actions has commited the fifo contents to the device. | |
128 | */ | |
129 | void vmw_cmdbuf_res_commit(struct list_head *list) | |
130 | { | |
131 | struct vmw_cmdbuf_res *entry, *next; | |
132 | ||
133 | list_for_each_entry_safe(entry, next, list, head) { | |
134 | list_del(&entry->head); | |
135 | switch (entry->state) { | |
136 | case VMW_CMDBUF_RES_ADD: | |
137 | entry->state = VMW_CMDBUF_RES_COMMITED; | |
138 | list_add_tail(&entry->head, &entry->man->list); | |
139 | break; | |
140 | case VMW_CMDBUF_RES_DEL: | |
141 | vmw_resource_unreference(&entry->res); | |
142 | kfree(entry); | |
143 | break; | |
144 | default: | |
145 | BUG(); | |
146 | break; | |
147 | } | |
148 | } | |
149 | } | |
150 | ||
151 | /** | |
152 | * vmw_cmdbuf_res_revert - Revert a list of command buffer resource actions | |
153 | * | |
154 | * @man: Pointer to the command buffer resource manager | |
155 | * @list: Caller's list of command buffer resource action | |
156 | * | |
157 | * This function reverts a list of command buffer resource | |
158 | * additions or removals. | |
159 | * It is typically called when the execbuf ioctl call triggering these | |
160 | * actions failed for some reason, and the command stream was never | |
161 | * submitted. | |
162 | */ | |
163 | void vmw_cmdbuf_res_revert(struct list_head *list) | |
164 | { | |
165 | struct vmw_cmdbuf_res *entry, *next; | |
166 | int ret; | |
167 | ||
168 | list_for_each_entry_safe(entry, next, list, head) { | |
169 | switch (entry->state) { | |
170 | case VMW_CMDBUF_RES_ADD: | |
171 | vmw_cmdbuf_res_free(entry->man, entry); | |
172 | break; | |
173 | case VMW_CMDBUF_RES_DEL: | |
174 | ret = drm_ht_insert_item(&entry->man->resources, | |
175 | &entry->hash); | |
176 | list_del(&entry->head); | |
177 | list_add_tail(&entry->head, &entry->man->list); | |
178 | entry->state = VMW_CMDBUF_RES_COMMITED; | |
179 | break; | |
180 | default: | |
181 | BUG(); | |
182 | break; | |
183 | } | |
184 | } | |
185 | } | |
186 | ||
187 | /** | |
188 | * vmw_cmdbuf_res_add - Stage a command buffer managed resource for addition. | |
189 | * | |
190 | * @man: Pointer to the command buffer resource manager. | |
191 | * @res_type: The resource type. | |
192 | * @user_key: The user-space id of the resource. | |
193 | * @res: Valid (refcount != 0) pointer to a struct vmw_resource. | |
194 | * @list: The staging list. | |
195 | * | |
196 | * This function allocates a struct vmw_cmdbuf_res entry and adds the | |
197 | * resource to the hash table of the manager identified by @man. The | |
198 | * entry is then put on the staging list identified by @list. | |
199 | */ | |
200 | int vmw_cmdbuf_res_add(struct vmw_cmdbuf_res_manager *man, | |
201 | enum vmw_cmdbuf_res_type res_type, | |
202 | u32 user_key, | |
203 | struct vmw_resource *res, | |
204 | struct list_head *list) | |
205 | { | |
206 | struct vmw_cmdbuf_res *cres; | |
207 | int ret; | |
208 | ||
209 | cres = kzalloc(sizeof(*cres), GFP_KERNEL); | |
210 | if (unlikely(cres == NULL)) | |
211 | return -ENOMEM; | |
212 | ||
213 | cres->hash.key = user_key | (res_type << 24); | |
214 | ret = drm_ht_insert_item(&man->resources, &cres->hash); | |
215 | if (unlikely(ret != 0)) | |
216 | goto out_invalid_key; | |
217 | ||
218 | cres->state = VMW_CMDBUF_RES_ADD; | |
219 | cres->res = vmw_resource_reference(res); | |
220 | cres->man = man; | |
221 | list_add_tail(&cres->head, list); | |
222 | ||
223 | out_invalid_key: | |
224 | return ret; | |
225 | } | |
226 | ||
227 | /** | |
228 | * vmw_cmdbuf_res_remove - Stage a command buffer managed resource for removal. | |
229 | * | |
230 | * @man: Pointer to the command buffer resource manager. | |
231 | * @res_type: The resource type. | |
232 | * @user_key: The user-space id of the resource. | |
233 | * @list: The staging list. | |
234 | * | |
235 | * This function looks up the struct vmw_cmdbuf_res entry from the manager | |
236 | * hash table and, if it exists, removes it. Depending on its current staging | |
237 | * state it then either removes the entry from the staging list or adds it | |
238 | * to it with a staging state of removal. | |
239 | */ | |
240 | int vmw_cmdbuf_res_remove(struct vmw_cmdbuf_res_manager *man, | |
241 | enum vmw_cmdbuf_res_type res_type, | |
242 | u32 user_key, | |
243 | struct list_head *list) | |
244 | { | |
245 | struct vmw_cmdbuf_res *entry; | |
246 | struct drm_hash_item *hash; | |
247 | int ret; | |
248 | ||
0468ab5b TH |
249 | ret = drm_ht_find_item(&man->resources, user_key | (res_type << 24), |
250 | &hash); | |
18e4a466 TH |
251 | if (likely(ret != 0)) |
252 | return -EINVAL; | |
253 | ||
254 | entry = drm_hash_entry(hash, struct vmw_cmdbuf_res, hash); | |
255 | ||
256 | switch (entry->state) { | |
257 | case VMW_CMDBUF_RES_ADD: | |
258 | vmw_cmdbuf_res_free(man, entry); | |
259 | break; | |
260 | case VMW_CMDBUF_RES_COMMITED: | |
261 | (void) drm_ht_remove_item(&man->resources, &entry->hash); | |
262 | list_del(&entry->head); | |
263 | entry->state = VMW_CMDBUF_RES_DEL; | |
264 | list_add_tail(&entry->head, list); | |
265 | break; | |
266 | default: | |
267 | BUG(); | |
268 | break; | |
269 | } | |
270 | ||
271 | return 0; | |
272 | } | |
273 | ||
274 | /** | |
275 | * vmw_cmdbuf_res_man_create - Allocate a command buffer managed resource | |
276 | * manager. | |
277 | * | |
278 | * @dev_priv: Pointer to a struct vmw_private | |
279 | * | |
280 | * Allocates and initializes a command buffer managed resource manager. Returns | |
281 | * an error pointer on failure. | |
282 | */ | |
283 | struct vmw_cmdbuf_res_manager * | |
284 | vmw_cmdbuf_res_man_create(struct vmw_private *dev_priv) | |
285 | { | |
286 | struct vmw_cmdbuf_res_manager *man; | |
287 | int ret; | |
288 | ||
289 | man = kzalloc(sizeof(*man), GFP_KERNEL); | |
290 | if (man == NULL) | |
291 | return ERR_PTR(-ENOMEM); | |
292 | ||
293 | man->dev_priv = dev_priv; | |
294 | INIT_LIST_HEAD(&man->list); | |
295 | ret = drm_ht_create(&man->resources, VMW_CMDBUF_RES_MAN_HT_ORDER); | |
296 | if (ret == 0) | |
297 | return man; | |
298 | ||
299 | kfree(man); | |
300 | return ERR_PTR(ret); | |
301 | } | |
302 | ||
303 | /** | |
304 | * vmw_cmdbuf_res_man_destroy - Destroy a command buffer managed resource | |
305 | * manager. | |
306 | * | |
307 | * @man: Pointer to the manager to destroy. | |
308 | * | |
309 | * This function destroys a command buffer managed resource manager and | |
310 | * unreferences / frees all command buffer managed resources and -entries | |
311 | * associated with it. | |
312 | */ | |
313 | void vmw_cmdbuf_res_man_destroy(struct vmw_cmdbuf_res_manager *man) | |
314 | { | |
315 | struct vmw_cmdbuf_res *entry, *next; | |
316 | ||
317 | list_for_each_entry_safe(entry, next, &man->list, head) | |
318 | vmw_cmdbuf_res_free(man, entry); | |
319 | ||
320 | kfree(man); | |
321 | } | |
322 | ||
323 | /** | |
324 | * | |
325 | * vmw_cmdbuf_res_man_size - Return the size of a command buffer managed | |
326 | * resource manager | |
327 | * | |
328 | * Returns the approximate allocation size of a command buffer managed | |
329 | * resource manager. | |
330 | */ | |
331 | size_t vmw_cmdbuf_res_man_size(void) | |
332 | { | |
333 | static size_t res_man_size; | |
334 | ||
335 | if (unlikely(res_man_size == 0)) | |
336 | res_man_size = | |
337 | ttm_round_pot(sizeof(struct vmw_cmdbuf_res_manager)) + | |
338 | ttm_round_pot(sizeof(struct hlist_head) << | |
339 | VMW_CMDBUF_RES_MAN_HT_ORDER); | |
340 | ||
341 | return res_man_size; | |
342 | } |