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1 | /************************************************************************** |
2 | * | |
54fbde8a | 3 | * Copyright © 2014-2015 VMware, Inc., Palo Alto, CA., USA |
18e4a466 TH |
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" | |
d80efd5c | 29 | #include "vmwgfx_resource_priv.h" |
18e4a466 TH |
30 | |
31 | #define VMW_CMDBUF_RES_MAN_HT_ORDER 12 | |
32 | ||
18e4a466 TH |
33 | /** |
34 | * struct vmw_cmdbuf_res - Command buffer managed resource entry. | |
35 | * | |
36 | * @res: Refcounted pointer to a struct vmw_resource. | |
37 | * @hash: Hash entry for the manager hash table. | |
38 | * @head: List head used either by the staging list or the manager list | |
39 | * of commited resources. | |
40 | * @state: Staging state of this resource entry. | |
41 | * @man: Pointer to a resource manager for this entry. | |
42 | */ | |
43 | struct vmw_cmdbuf_res { | |
44 | struct vmw_resource *res; | |
45 | struct drm_hash_item hash; | |
46 | struct list_head head; | |
47 | enum vmw_cmdbuf_res_state state; | |
48 | struct vmw_cmdbuf_res_manager *man; | |
49 | }; | |
50 | ||
51 | /** | |
52 | * struct vmw_cmdbuf_res_manager - Command buffer resource manager. | |
53 | * | |
54 | * @resources: Hash table containing staged and commited command buffer | |
55 | * resources | |
56 | * @list: List of commited command buffer resources. | |
57 | * @dev_priv: Pointer to a device private structure. | |
58 | * | |
59 | * @resources and @list are protected by the cmdbuf mutex for now. | |
60 | */ | |
61 | struct vmw_cmdbuf_res_manager { | |
62 | struct drm_open_hash resources; | |
63 | struct list_head list; | |
64 | struct vmw_private *dev_priv; | |
65 | }; | |
66 | ||
67 | ||
68 | /** | |
69 | * vmw_cmdbuf_res_lookup - Look up a command buffer resource | |
70 | * | |
71 | * @man: Pointer to the command buffer resource manager | |
72 | * @resource_type: The resource type, that combined with the user key | |
73 | * identifies the resource. | |
74 | * @user_key: The user key. | |
75 | * | |
76 | * Returns a valid refcounted struct vmw_resource pointer on success, | |
77 | * an error pointer on failure. | |
78 | */ | |
79 | struct vmw_resource * | |
80 | vmw_cmdbuf_res_lookup(struct vmw_cmdbuf_res_manager *man, | |
81 | enum vmw_cmdbuf_res_type res_type, | |
82 | u32 user_key) | |
83 | { | |
84 | struct drm_hash_item *hash; | |
85 | int ret; | |
86 | unsigned long key = user_key | (res_type << 24); | |
87 | ||
88 | ret = drm_ht_find_item(&man->resources, key, &hash); | |
89 | if (unlikely(ret != 0)) | |
90 | return ERR_PTR(ret); | |
91 | ||
92 | return vmw_resource_reference | |
93 | (drm_hash_entry(hash, struct vmw_cmdbuf_res, hash)->res); | |
94 | } | |
95 | ||
96 | /** | |
97 | * vmw_cmdbuf_res_free - Free a command buffer resource. | |
98 | * | |
99 | * @man: Pointer to the command buffer resource manager | |
100 | * @entry: Pointer to a struct vmw_cmdbuf_res. | |
101 | * | |
102 | * Frees a struct vmw_cmdbuf_res entry and drops its reference to the | |
103 | * struct vmw_resource. | |
104 | */ | |
105 | static void vmw_cmdbuf_res_free(struct vmw_cmdbuf_res_manager *man, | |
106 | struct vmw_cmdbuf_res *entry) | |
107 | { | |
108 | list_del(&entry->head); | |
109 | WARN_ON(drm_ht_remove_item(&man->resources, &entry->hash)); | |
110 | vmw_resource_unreference(&entry->res); | |
111 | kfree(entry); | |
112 | } | |
113 | ||
114 | /** | |
115 | * vmw_cmdbuf_res_commit - Commit a list of command buffer resource actions | |
116 | * | |
117 | * @list: Caller's list of command buffer resource actions. | |
118 | * | |
119 | * This function commits a list of command buffer resource | |
120 | * additions or removals. | |
121 | * It is typically called when the execbuf ioctl call triggering these | |
122 | * actions has commited the fifo contents to the device. | |
123 | */ | |
124 | void vmw_cmdbuf_res_commit(struct list_head *list) | |
125 | { | |
126 | struct vmw_cmdbuf_res *entry, *next; | |
127 | ||
128 | list_for_each_entry_safe(entry, next, list, head) { | |
129 | list_del(&entry->head); | |
d80efd5c TH |
130 | if (entry->res->func->commit_notify) |
131 | entry->res->func->commit_notify(entry->res, | |
132 | entry->state); | |
18e4a466 TH |
133 | switch (entry->state) { |
134 | case VMW_CMDBUF_RES_ADD: | |
d80efd5c | 135 | entry->state = VMW_CMDBUF_RES_COMMITTED; |
18e4a466 TH |
136 | list_add_tail(&entry->head, &entry->man->list); |
137 | break; | |
138 | case VMW_CMDBUF_RES_DEL: | |
139 | vmw_resource_unreference(&entry->res); | |
140 | kfree(entry); | |
141 | break; | |
142 | default: | |
143 | BUG(); | |
144 | break; | |
145 | } | |
146 | } | |
147 | } | |
148 | ||
149 | /** | |
150 | * vmw_cmdbuf_res_revert - Revert a list of command buffer resource actions | |
151 | * | |
152 | * @man: Pointer to the command buffer resource manager | |
153 | * @list: Caller's list of command buffer resource action | |
154 | * | |
155 | * This function reverts a list of command buffer resource | |
156 | * additions or removals. | |
157 | * It is typically called when the execbuf ioctl call triggering these | |
158 | * actions failed for some reason, and the command stream was never | |
159 | * submitted. | |
160 | */ | |
161 | void vmw_cmdbuf_res_revert(struct list_head *list) | |
162 | { | |
163 | struct vmw_cmdbuf_res *entry, *next; | |
164 | int ret; | |
165 | ||
166 | list_for_each_entry_safe(entry, next, list, head) { | |
167 | switch (entry->state) { | |
168 | case VMW_CMDBUF_RES_ADD: | |
169 | vmw_cmdbuf_res_free(entry->man, entry); | |
170 | break; | |
171 | case VMW_CMDBUF_RES_DEL: | |
172 | ret = drm_ht_insert_item(&entry->man->resources, | |
173 | &entry->hash); | |
174 | list_del(&entry->head); | |
175 | list_add_tail(&entry->head, &entry->man->list); | |
d80efd5c | 176 | entry->state = VMW_CMDBUF_RES_COMMITTED; |
18e4a466 TH |
177 | break; |
178 | default: | |
179 | BUG(); | |
180 | break; | |
181 | } | |
182 | } | |
183 | } | |
184 | ||
185 | /** | |
186 | * vmw_cmdbuf_res_add - Stage a command buffer managed resource for addition. | |
187 | * | |
188 | * @man: Pointer to the command buffer resource manager. | |
189 | * @res_type: The resource type. | |
190 | * @user_key: The user-space id of the resource. | |
191 | * @res: Valid (refcount != 0) pointer to a struct vmw_resource. | |
192 | * @list: The staging list. | |
193 | * | |
194 | * This function allocates a struct vmw_cmdbuf_res entry and adds the | |
195 | * resource to the hash table of the manager identified by @man. The | |
196 | * entry is then put on the staging list identified by @list. | |
197 | */ | |
198 | int vmw_cmdbuf_res_add(struct vmw_cmdbuf_res_manager *man, | |
199 | enum vmw_cmdbuf_res_type res_type, | |
200 | u32 user_key, | |
201 | struct vmw_resource *res, | |
202 | struct list_head *list) | |
203 | { | |
204 | struct vmw_cmdbuf_res *cres; | |
205 | int ret; | |
206 | ||
207 | cres = kzalloc(sizeof(*cres), GFP_KERNEL); | |
208 | if (unlikely(cres == NULL)) | |
209 | return -ENOMEM; | |
210 | ||
211 | cres->hash.key = user_key | (res_type << 24); | |
212 | ret = drm_ht_insert_item(&man->resources, &cres->hash); | |
213 | if (unlikely(ret != 0)) | |
214 | goto out_invalid_key; | |
215 | ||
216 | cres->state = VMW_CMDBUF_RES_ADD; | |
217 | cres->res = vmw_resource_reference(res); | |
218 | cres->man = man; | |
219 | list_add_tail(&cres->head, list); | |
220 | ||
221 | out_invalid_key: | |
222 | return ret; | |
223 | } | |
224 | ||
225 | /** | |
226 | * vmw_cmdbuf_res_remove - Stage a command buffer managed resource for removal. | |
227 | * | |
228 | * @man: Pointer to the command buffer resource manager. | |
229 | * @res_type: The resource type. | |
230 | * @user_key: The user-space id of the resource. | |
231 | * @list: The staging list. | |
d80efd5c TH |
232 | * @res_p: If the resource is in an already committed state, points to the |
233 | * struct vmw_resource on successful return. The pointer will be | |
234 | * non ref-counted. | |
18e4a466 TH |
235 | * |
236 | * This function looks up the struct vmw_cmdbuf_res entry from the manager | |
237 | * hash table and, if it exists, removes it. Depending on its current staging | |
238 | * state it then either removes the entry from the staging list or adds it | |
239 | * to it with a staging state of removal. | |
240 | */ | |
241 | int vmw_cmdbuf_res_remove(struct vmw_cmdbuf_res_manager *man, | |
242 | enum vmw_cmdbuf_res_type res_type, | |
243 | u32 user_key, | |
d80efd5c TH |
244 | struct list_head *list, |
245 | struct vmw_resource **res_p) | |
18e4a466 TH |
246 | { |
247 | struct vmw_cmdbuf_res *entry; | |
248 | struct drm_hash_item *hash; | |
249 | int ret; | |
250 | ||
0468ab5b TH |
251 | ret = drm_ht_find_item(&man->resources, user_key | (res_type << 24), |
252 | &hash); | |
18e4a466 TH |
253 | if (likely(ret != 0)) |
254 | return -EINVAL; | |
255 | ||
256 | entry = drm_hash_entry(hash, struct vmw_cmdbuf_res, hash); | |
257 | ||
258 | switch (entry->state) { | |
259 | case VMW_CMDBUF_RES_ADD: | |
260 | vmw_cmdbuf_res_free(man, entry); | |
d80efd5c | 261 | *res_p = NULL; |
18e4a466 | 262 | break; |
d80efd5c | 263 | case VMW_CMDBUF_RES_COMMITTED: |
18e4a466 TH |
264 | (void) drm_ht_remove_item(&man->resources, &entry->hash); |
265 | list_del(&entry->head); | |
266 | entry->state = VMW_CMDBUF_RES_DEL; | |
267 | list_add_tail(&entry->head, list); | |
d80efd5c | 268 | *res_p = entry->res; |
18e4a466 TH |
269 | break; |
270 | default: | |
271 | BUG(); | |
272 | break; | |
273 | } | |
274 | ||
275 | return 0; | |
276 | } | |
277 | ||
278 | /** | |
279 | * vmw_cmdbuf_res_man_create - Allocate a command buffer managed resource | |
280 | * manager. | |
281 | * | |
282 | * @dev_priv: Pointer to a struct vmw_private | |
283 | * | |
284 | * Allocates and initializes a command buffer managed resource manager. Returns | |
285 | * an error pointer on failure. | |
286 | */ | |
287 | struct vmw_cmdbuf_res_manager * | |
288 | vmw_cmdbuf_res_man_create(struct vmw_private *dev_priv) | |
289 | { | |
290 | struct vmw_cmdbuf_res_manager *man; | |
291 | int ret; | |
292 | ||
293 | man = kzalloc(sizeof(*man), GFP_KERNEL); | |
294 | if (man == NULL) | |
295 | return ERR_PTR(-ENOMEM); | |
296 | ||
297 | man->dev_priv = dev_priv; | |
298 | INIT_LIST_HEAD(&man->list); | |
299 | ret = drm_ht_create(&man->resources, VMW_CMDBUF_RES_MAN_HT_ORDER); | |
300 | if (ret == 0) | |
301 | return man; | |
302 | ||
303 | kfree(man); | |
304 | return ERR_PTR(ret); | |
305 | } | |
306 | ||
307 | /** | |
308 | * vmw_cmdbuf_res_man_destroy - Destroy a command buffer managed resource | |
309 | * manager. | |
310 | * | |
311 | * @man: Pointer to the manager to destroy. | |
312 | * | |
313 | * This function destroys a command buffer managed resource manager and | |
314 | * unreferences / frees all command buffer managed resources and -entries | |
315 | * associated with it. | |
316 | */ | |
317 | void vmw_cmdbuf_res_man_destroy(struct vmw_cmdbuf_res_manager *man) | |
318 | { | |
319 | struct vmw_cmdbuf_res *entry, *next; | |
320 | ||
321 | list_for_each_entry_safe(entry, next, &man->list, head) | |
322 | vmw_cmdbuf_res_free(man, entry); | |
323 | ||
324 | kfree(man); | |
325 | } | |
326 | ||
327 | /** | |
328 | * | |
329 | * vmw_cmdbuf_res_man_size - Return the size of a command buffer managed | |
330 | * resource manager | |
331 | * | |
332 | * Returns the approximate allocation size of a command buffer managed | |
333 | * resource manager. | |
334 | */ | |
335 | size_t vmw_cmdbuf_res_man_size(void) | |
336 | { | |
337 | static size_t res_man_size; | |
338 | ||
339 | if (unlikely(res_man_size == 0)) | |
340 | res_man_size = | |
341 | ttm_round_pot(sizeof(struct vmw_cmdbuf_res_manager)) + | |
342 | ttm_round_pot(sizeof(struct hlist_head) << | |
343 | VMW_CMDBUF_RES_MAN_HT_ORDER); | |
344 | ||
345 | return res_man_size; | |
346 | } |