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3eab3d9e TH |
1 | /************************************************************************** |
2 | * | |
3 | * Copyright © 2015 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 "ttm/ttm_bo_api.h" | |
30 | ||
31 | /* | |
32 | * Size of inline command buffers. Try to make sure that a page size is a | |
33 | * multiple of the DMA pool allocation size. | |
34 | */ | |
35 | #define VMW_CMDBUF_INLINE_ALIGN 64 | |
9b590783 TH |
36 | #define VMW_CMDBUF_INLINE_SIZE \ |
37 | (1024 - ALIGN(sizeof(SVGACBHeader), VMW_CMDBUF_INLINE_ALIGN)) | |
3eab3d9e TH |
38 | |
39 | /** | |
40 | * struct vmw_cmdbuf_context - Command buffer context queues | |
41 | * | |
42 | * @submitted: List of command buffers that have been submitted to the | |
43 | * manager but not yet submitted to hardware. | |
44 | * @hw_submitted: List of command buffers submitted to hardware. | |
45 | * @preempted: List of preempted command buffers. | |
46 | * @num_hw_submitted: Number of buffers currently being processed by hardware | |
47 | */ | |
48 | struct vmw_cmdbuf_context { | |
49 | struct list_head submitted; | |
50 | struct list_head hw_submitted; | |
51 | struct list_head preempted; | |
52 | unsigned num_hw_submitted; | |
53 | }; | |
54 | ||
55 | /** | |
56 | * struct vmw_cmdbuf_man: - Command buffer manager | |
57 | * | |
58 | * @cur_mutex: Mutex protecting the command buffer used for incremental small | |
59 | * kernel command submissions, @cur. | |
60 | * @space_mutex: Mutex to protect against starvation when we allocate | |
61 | * main pool buffer space. | |
62 | * @work: A struct work_struct implementeing command buffer error handling. | |
63 | * Immutable. | |
64 | * @dev_priv: Pointer to the device private struct. Immutable. | |
65 | * @ctx: Array of command buffer context queues. The queues and the context | |
66 | * data is protected by @lock. | |
67 | * @error: List of command buffers that have caused device errors. | |
68 | * Protected by @lock. | |
69 | * @mm: Range manager for the command buffer space. Manager allocations and | |
70 | * frees are protected by @lock. | |
71 | * @cmd_space: Buffer object for the command buffer space, unless we were | |
72 | * able to make a contigous coherent DMA memory allocation, @handle. Immutable. | |
73 | * @map_obj: Mapping state for @cmd_space. Immutable. | |
74 | * @map: Pointer to command buffer space. May be a mapped buffer object or | |
75 | * a contigous coherent DMA memory allocation. Immutable. | |
76 | * @cur: Command buffer for small kernel command submissions. Protected by | |
77 | * the @cur_mutex. | |
78 | * @cur_pos: Space already used in @cur. Protected by @cur_mutex. | |
79 | * @default_size: Default size for the @cur command buffer. Immutable. | |
80 | * @max_hw_submitted: Max number of in-flight command buffers the device can | |
81 | * handle. Immutable. | |
82 | * @lock: Spinlock protecting command submission queues. | |
83 | * @header: Pool of DMA memory for device command buffer headers. | |
84 | * Internal protection. | |
85 | * @dheaders: Pool of DMA memory for device command buffer headers with trailing | |
86 | * space for inline data. Internal protection. | |
87 | * @tasklet: Tasklet struct for irq processing. Immutable. | |
88 | * @alloc_queue: Wait queue for processes waiting to allocate command buffer | |
89 | * space. | |
90 | * @idle_queue: Wait queue for processes waiting for command buffer idle. | |
91 | * @irq_on: Whether the process function has requested irq to be turned on. | |
92 | * Protected by @lock. | |
93 | * @using_mob: Whether the command buffer space is a MOB or a contigous DMA | |
94 | * allocation. Immutable. | |
95 | * @has_pool: Has a large pool of DMA memory which allows larger allocations. | |
96 | * Typically this is false only during bootstrap. | |
97 | * @handle: DMA address handle for the command buffer space if @using_mob is | |
98 | * false. Immutable. | |
99 | * @size: The size of the command buffer space. Immutable. | |
100 | */ | |
101 | struct vmw_cmdbuf_man { | |
102 | struct mutex cur_mutex; | |
103 | struct mutex space_mutex; | |
104 | struct work_struct work; | |
105 | struct vmw_private *dev_priv; | |
106 | struct vmw_cmdbuf_context ctx[SVGA_CB_CONTEXT_MAX]; | |
107 | struct list_head error; | |
108 | struct drm_mm mm; | |
109 | struct ttm_buffer_object *cmd_space; | |
110 | struct ttm_bo_kmap_obj map_obj; | |
111 | u8 *map; | |
112 | struct vmw_cmdbuf_header *cur; | |
113 | size_t cur_pos; | |
114 | size_t default_size; | |
115 | unsigned max_hw_submitted; | |
116 | spinlock_t lock; | |
117 | struct dma_pool *headers; | |
118 | struct dma_pool *dheaders; | |
119 | struct tasklet_struct tasklet; | |
120 | wait_queue_head_t alloc_queue; | |
121 | wait_queue_head_t idle_queue; | |
122 | bool irq_on; | |
123 | bool using_mob; | |
124 | bool has_pool; | |
125 | dma_addr_t handle; | |
126 | size_t size; | |
127 | }; | |
128 | ||
129 | /** | |
130 | * struct vmw_cmdbuf_header - Command buffer metadata | |
131 | * | |
132 | * @man: The command buffer manager. | |
133 | * @cb_header: Device command buffer header, allocated from a DMA pool. | |
134 | * @cb_context: The device command buffer context. | |
135 | * @list: List head for attaching to the manager lists. | |
136 | * @node: The range manager node. | |
137 | * @handle. The DMA address of @cb_header. Handed to the device on command | |
138 | * buffer submission. | |
139 | * @cmd: Pointer to the command buffer space of this buffer. | |
140 | * @size: Size of the command buffer space of this buffer. | |
141 | * @reserved: Reserved space of this buffer. | |
142 | * @inline_space: Whether inline command buffer space is used. | |
143 | */ | |
144 | struct vmw_cmdbuf_header { | |
145 | struct vmw_cmdbuf_man *man; | |
146 | SVGACBHeader *cb_header; | |
147 | SVGACBContext cb_context; | |
148 | struct list_head list; | |
9b590783 | 149 | struct drm_mm_node node; |
3eab3d9e TH |
150 | dma_addr_t handle; |
151 | u8 *cmd; | |
152 | size_t size; | |
153 | size_t reserved; | |
154 | bool inline_space; | |
155 | }; | |
156 | ||
157 | /** | |
158 | * struct vmw_cmdbuf_dheader - Device command buffer header with inline | |
159 | * command buffer space. | |
160 | * | |
161 | * @cb_header: Device command buffer header. | |
162 | * @cmd: Inline command buffer space. | |
163 | */ | |
164 | struct vmw_cmdbuf_dheader { | |
165 | SVGACBHeader cb_header; | |
166 | u8 cmd[VMW_CMDBUF_INLINE_SIZE] __aligned(VMW_CMDBUF_INLINE_ALIGN); | |
167 | }; | |
168 | ||
169 | /** | |
170 | * struct vmw_cmdbuf_alloc_info - Command buffer space allocation metadata | |
171 | * | |
172 | * @page_size: Size of requested command buffer space in pages. | |
9b590783 TH |
173 | * @node: Pointer to the range manager node. |
174 | * @done: True if this allocation has succeeded. | |
3eab3d9e TH |
175 | */ |
176 | struct vmw_cmdbuf_alloc_info { | |
177 | size_t page_size; | |
178 | struct drm_mm_node *node; | |
9b590783 | 179 | bool done; |
3eab3d9e TH |
180 | }; |
181 | ||
182 | /* Loop over each context in the command buffer manager. */ | |
183 | #define for_each_cmdbuf_ctx(_man, _i, _ctx) \ | |
184 | for (_i = 0, _ctx = &(_man)->ctx[0]; (_i) < SVGA_CB_CONTEXT_MAX; \ | |
185 | ++(_i), ++(_ctx)) | |
186 | ||
187 | static int vmw_cmdbuf_startstop(struct vmw_cmdbuf_man *man, bool enable); | |
188 | ||
189 | ||
190 | /** | |
191 | * vmw_cmdbuf_cur_lock - Helper to lock the cur_mutex. | |
192 | * | |
193 | * @man: The range manager. | |
194 | * @interruptible: Whether to wait interruptible when locking. | |
195 | */ | |
196 | static int vmw_cmdbuf_cur_lock(struct vmw_cmdbuf_man *man, bool interruptible) | |
197 | { | |
198 | if (interruptible) { | |
199 | if (mutex_lock_interruptible(&man->cur_mutex)) | |
200 | return -ERESTARTSYS; | |
201 | } else { | |
202 | mutex_lock(&man->cur_mutex); | |
203 | } | |
204 | ||
205 | return 0; | |
206 | } | |
207 | ||
208 | /** | |
209 | * vmw_cmdbuf_cur_unlock - Helper to unlock the cur_mutex. | |
210 | * | |
211 | * @man: The range manager. | |
212 | */ | |
213 | static void vmw_cmdbuf_cur_unlock(struct vmw_cmdbuf_man *man) | |
214 | { | |
215 | mutex_unlock(&man->cur_mutex); | |
216 | } | |
217 | ||
218 | /** | |
219 | * vmw_cmdbuf_header_inline_free - Free a struct vmw_cmdbuf_header that has | |
220 | * been used for the device context with inline command buffers. | |
221 | * Need not be called locked. | |
222 | * | |
223 | * @header: Pointer to the header to free. | |
224 | */ | |
225 | static void vmw_cmdbuf_header_inline_free(struct vmw_cmdbuf_header *header) | |
226 | { | |
227 | struct vmw_cmdbuf_dheader *dheader; | |
228 | ||
229 | if (WARN_ON_ONCE(!header->inline_space)) | |
230 | return; | |
231 | ||
232 | dheader = container_of(header->cb_header, struct vmw_cmdbuf_dheader, | |
233 | cb_header); | |
234 | dma_pool_free(header->man->dheaders, dheader, header->handle); | |
235 | kfree(header); | |
236 | } | |
237 | ||
238 | /** | |
239 | * __vmw_cmdbuf_header_free - Free a struct vmw_cmdbuf_header and its | |
240 | * associated structures. | |
241 | * | |
242 | * header: Pointer to the header to free. | |
243 | * | |
244 | * For internal use. Must be called with man::lock held. | |
245 | */ | |
246 | static void __vmw_cmdbuf_header_free(struct vmw_cmdbuf_header *header) | |
247 | { | |
248 | struct vmw_cmdbuf_man *man = header->man; | |
249 | ||
fb89ac51 | 250 | lockdep_assert_held_once(&man->lock); |
3eab3d9e TH |
251 | |
252 | if (header->inline_space) { | |
253 | vmw_cmdbuf_header_inline_free(header); | |
254 | return; | |
255 | } | |
256 | ||
9b590783 | 257 | drm_mm_remove_node(&header->node); |
3eab3d9e TH |
258 | wake_up_all(&man->alloc_queue); |
259 | if (header->cb_header) | |
260 | dma_pool_free(man->headers, header->cb_header, | |
261 | header->handle); | |
262 | kfree(header); | |
263 | } | |
264 | ||
265 | /** | |
266 | * vmw_cmdbuf_header_free - Free a struct vmw_cmdbuf_header and its | |
267 | * associated structures. | |
268 | * | |
269 | * @header: Pointer to the header to free. | |
270 | */ | |
271 | void vmw_cmdbuf_header_free(struct vmw_cmdbuf_header *header) | |
272 | { | |
273 | struct vmw_cmdbuf_man *man = header->man; | |
274 | ||
275 | /* Avoid locking if inline_space */ | |
276 | if (header->inline_space) { | |
277 | vmw_cmdbuf_header_inline_free(header); | |
278 | return; | |
279 | } | |
280 | spin_lock_bh(&man->lock); | |
281 | __vmw_cmdbuf_header_free(header); | |
282 | spin_unlock_bh(&man->lock); | |
283 | } | |
284 | ||
285 | ||
286 | /** | |
287 | * vmw_cmbuf_header_submit: Submit a command buffer to hardware. | |
288 | * | |
289 | * @header: The header of the buffer to submit. | |
290 | */ | |
291 | static int vmw_cmdbuf_header_submit(struct vmw_cmdbuf_header *header) | |
292 | { | |
293 | struct vmw_cmdbuf_man *man = header->man; | |
294 | u32 val; | |
295 | ||
0e7c875d | 296 | val = upper_32_bits(header->handle); |
3eab3d9e | 297 | vmw_write(man->dev_priv, SVGA_REG_COMMAND_HIGH, val); |
2e3cc8cf | 298 | |
0e7c875d | 299 | val = lower_32_bits(header->handle); |
3eab3d9e TH |
300 | val |= header->cb_context & SVGA_CB_CONTEXT_MASK; |
301 | vmw_write(man->dev_priv, SVGA_REG_COMMAND_LOW, val); | |
302 | ||
303 | return header->cb_header->status; | |
304 | } | |
305 | ||
306 | /** | |
307 | * vmw_cmdbuf_ctx_init: Initialize a command buffer context. | |
308 | * | |
309 | * @ctx: The command buffer context to initialize | |
310 | */ | |
311 | static void vmw_cmdbuf_ctx_init(struct vmw_cmdbuf_context *ctx) | |
312 | { | |
313 | INIT_LIST_HEAD(&ctx->hw_submitted); | |
314 | INIT_LIST_HEAD(&ctx->submitted); | |
315 | INIT_LIST_HEAD(&ctx->preempted); | |
316 | ctx->num_hw_submitted = 0; | |
317 | } | |
318 | ||
319 | /** | |
320 | * vmw_cmdbuf_ctx_submit: Submit command buffers from a command buffer | |
321 | * context. | |
322 | * | |
323 | * @man: The command buffer manager. | |
324 | * @ctx: The command buffer context. | |
325 | * | |
326 | * Submits command buffers to hardware until there are no more command | |
327 | * buffers to submit or the hardware can't handle more command buffers. | |
328 | */ | |
329 | static void vmw_cmdbuf_ctx_submit(struct vmw_cmdbuf_man *man, | |
330 | struct vmw_cmdbuf_context *ctx) | |
331 | { | |
332 | while (ctx->num_hw_submitted < man->max_hw_submitted && | |
333 | !list_empty(&ctx->submitted)) { | |
334 | struct vmw_cmdbuf_header *entry; | |
335 | SVGACBStatus status; | |
336 | ||
337 | entry = list_first_entry(&ctx->submitted, | |
338 | struct vmw_cmdbuf_header, | |
339 | list); | |
340 | ||
341 | status = vmw_cmdbuf_header_submit(entry); | |
342 | ||
343 | /* This should never happen */ | |
344 | if (WARN_ON_ONCE(status == SVGA_CB_STATUS_QUEUE_FULL)) { | |
345 | entry->cb_header->status = SVGA_CB_STATUS_NONE; | |
346 | break; | |
347 | } | |
348 | ||
349 | list_del(&entry->list); | |
350 | list_add_tail(&entry->list, &ctx->hw_submitted); | |
351 | ctx->num_hw_submitted++; | |
352 | } | |
353 | ||
354 | } | |
355 | ||
356 | /** | |
357 | * vmw_cmdbuf_ctx_submit: Process a command buffer context. | |
358 | * | |
359 | * @man: The command buffer manager. | |
360 | * @ctx: The command buffer context. | |
361 | * | |
362 | * Submit command buffers to hardware if possible, and process finished | |
363 | * buffers. Typically freeing them, but on preemption or error take | |
364 | * appropriate action. Wake up waiters if appropriate. | |
365 | */ | |
366 | static void vmw_cmdbuf_ctx_process(struct vmw_cmdbuf_man *man, | |
367 | struct vmw_cmdbuf_context *ctx, | |
368 | int *notempty) | |
369 | { | |
370 | struct vmw_cmdbuf_header *entry, *next; | |
371 | ||
372 | vmw_cmdbuf_ctx_submit(man, ctx); | |
373 | ||
374 | list_for_each_entry_safe(entry, next, &ctx->hw_submitted, list) { | |
375 | SVGACBStatus status = entry->cb_header->status; | |
376 | ||
377 | if (status == SVGA_CB_STATUS_NONE) | |
378 | break; | |
379 | ||
380 | list_del(&entry->list); | |
381 | wake_up_all(&man->idle_queue); | |
382 | ctx->num_hw_submitted--; | |
383 | switch (status) { | |
384 | case SVGA_CB_STATUS_COMPLETED: | |
385 | __vmw_cmdbuf_header_free(entry); | |
386 | break; | |
387 | case SVGA_CB_STATUS_COMMAND_ERROR: | |
388 | case SVGA_CB_STATUS_CB_HEADER_ERROR: | |
389 | list_add_tail(&entry->list, &man->error); | |
390 | schedule_work(&man->work); | |
391 | break; | |
392 | case SVGA_CB_STATUS_PREEMPTED: | |
393 | list_add(&entry->list, &ctx->preempted); | |
394 | break; | |
395 | default: | |
396 | WARN_ONCE(true, "Undefined command buffer status.\n"); | |
397 | __vmw_cmdbuf_header_free(entry); | |
398 | break; | |
399 | } | |
400 | } | |
401 | ||
402 | vmw_cmdbuf_ctx_submit(man, ctx); | |
403 | if (!list_empty(&ctx->submitted)) | |
404 | (*notempty)++; | |
405 | } | |
406 | ||
407 | /** | |
408 | * vmw_cmdbuf_man_process - Process all command buffer contexts and | |
409 | * switch on and off irqs as appropriate. | |
410 | * | |
411 | * @man: The command buffer manager. | |
412 | * | |
413 | * Calls vmw_cmdbuf_ctx_process() on all contexts. If any context has | |
414 | * command buffers left that are not submitted to hardware, Make sure | |
09dc1387 | 415 | * IRQ handling is turned on. Otherwise, make sure it's turned off. |
3eab3d9e | 416 | */ |
09dc1387 | 417 | static void vmw_cmdbuf_man_process(struct vmw_cmdbuf_man *man) |
3eab3d9e | 418 | { |
09dc1387 | 419 | int notempty; |
3eab3d9e TH |
420 | struct vmw_cmdbuf_context *ctx; |
421 | int i; | |
422 | ||
09dc1387 TH |
423 | retry: |
424 | notempty = 0; | |
3eab3d9e TH |
425 | for_each_cmdbuf_ctx(man, i, ctx) |
426 | vmw_cmdbuf_ctx_process(man, ctx, ¬empty); | |
427 | ||
428 | if (man->irq_on && !notempty) { | |
429 | vmw_generic_waiter_remove(man->dev_priv, | |
430 | SVGA_IRQFLAG_COMMAND_BUFFER, | |
431 | &man->dev_priv->cmdbuf_waiters); | |
432 | man->irq_on = false; | |
433 | } else if (!man->irq_on && notempty) { | |
434 | vmw_generic_waiter_add(man->dev_priv, | |
435 | SVGA_IRQFLAG_COMMAND_BUFFER, | |
436 | &man->dev_priv->cmdbuf_waiters); | |
437 | man->irq_on = true; | |
438 | ||
439 | /* Rerun in case we just missed an irq. */ | |
09dc1387 | 440 | goto retry; |
3eab3d9e | 441 | } |
3eab3d9e TH |
442 | } |
443 | ||
444 | /** | |
445 | * vmw_cmdbuf_ctx_add - Schedule a command buffer for submission on a | |
446 | * command buffer context | |
447 | * | |
448 | * @man: The command buffer manager. | |
449 | * @header: The header of the buffer to submit. | |
450 | * @cb_context: The command buffer context to use. | |
451 | * | |
452 | * This function adds @header to the "submitted" queue of the command | |
453 | * buffer context identified by @cb_context. It then calls the command buffer | |
454 | * manager processing to potentially submit the buffer to hardware. | |
455 | * @man->lock needs to be held when calling this function. | |
456 | */ | |
457 | static void vmw_cmdbuf_ctx_add(struct vmw_cmdbuf_man *man, | |
458 | struct vmw_cmdbuf_header *header, | |
459 | SVGACBContext cb_context) | |
460 | { | |
461 | if (!(header->cb_header->flags & SVGA_CB_FLAG_DX_CONTEXT)) | |
462 | header->cb_header->dxContext = 0; | |
463 | header->cb_context = cb_context; | |
464 | list_add_tail(&header->list, &man->ctx[cb_context].submitted); | |
465 | ||
09dc1387 | 466 | vmw_cmdbuf_man_process(man); |
3eab3d9e TH |
467 | } |
468 | ||
469 | /** | |
470 | * vmw_cmdbuf_man_tasklet - The main part of the command buffer interrupt | |
471 | * handler implemented as a tasklet. | |
472 | * | |
473 | * @data: Tasklet closure. A pointer to the command buffer manager cast to | |
474 | * an unsigned long. | |
475 | * | |
476 | * The bottom half (tasklet) of the interrupt handler simply calls into the | |
477 | * command buffer processor to free finished buffers and submit any | |
478 | * queued buffers to hardware. | |
479 | */ | |
480 | static void vmw_cmdbuf_man_tasklet(unsigned long data) | |
481 | { | |
482 | struct vmw_cmdbuf_man *man = (struct vmw_cmdbuf_man *) data; | |
483 | ||
484 | spin_lock(&man->lock); | |
09dc1387 | 485 | vmw_cmdbuf_man_process(man); |
3eab3d9e TH |
486 | spin_unlock(&man->lock); |
487 | } | |
488 | ||
489 | /** | |
490 | * vmw_cmdbuf_work_func - The deferred work function that handles | |
491 | * command buffer errors. | |
492 | * | |
493 | * @work: The work func closure argument. | |
494 | * | |
495 | * Restarting the command buffer context after an error requires process | |
496 | * context, so it is deferred to this work function. | |
497 | */ | |
498 | static void vmw_cmdbuf_work_func(struct work_struct *work) | |
499 | { | |
500 | struct vmw_cmdbuf_man *man = | |
501 | container_of(work, struct vmw_cmdbuf_man, work); | |
502 | struct vmw_cmdbuf_header *entry, *next; | |
09dc1387 | 503 | uint32_t dummy; |
6a5278ee | 504 | bool restart = false; |
3eab3d9e TH |
505 | |
506 | spin_lock_bh(&man->lock); | |
507 | list_for_each_entry_safe(entry, next, &man->error, list) { | |
508 | restart = true; | |
509 | DRM_ERROR("Command buffer error.\n"); | |
510 | ||
511 | list_del(&entry->list); | |
512 | __vmw_cmdbuf_header_free(entry); | |
513 | wake_up_all(&man->idle_queue); | |
514 | } | |
515 | spin_unlock_bh(&man->lock); | |
516 | ||
517 | if (restart && vmw_cmdbuf_startstop(man, true)) | |
518 | DRM_ERROR("Failed restarting command buffer context 0.\n"); | |
519 | ||
09dc1387 TH |
520 | /* Send a new fence in case one was removed */ |
521 | vmw_fifo_send_fence(man->dev_priv, &dummy); | |
3eab3d9e TH |
522 | } |
523 | ||
524 | /** | |
525 | * vmw_cmdbuf_man idle - Check whether the command buffer manager is idle. | |
526 | * | |
527 | * @man: The command buffer manager. | |
528 | * @check_preempted: Check also the preempted queue for pending command buffers. | |
529 | * | |
530 | */ | |
531 | static bool vmw_cmdbuf_man_idle(struct vmw_cmdbuf_man *man, | |
532 | bool check_preempted) | |
533 | { | |
534 | struct vmw_cmdbuf_context *ctx; | |
535 | bool idle = false; | |
536 | int i; | |
537 | ||
538 | spin_lock_bh(&man->lock); | |
539 | vmw_cmdbuf_man_process(man); | |
540 | for_each_cmdbuf_ctx(man, i, ctx) { | |
541 | if (!list_empty(&ctx->submitted) || | |
542 | !list_empty(&ctx->hw_submitted) || | |
543 | (check_preempted && !list_empty(&ctx->preempted))) | |
544 | goto out_unlock; | |
545 | } | |
546 | ||
547 | idle = list_empty(&man->error); | |
548 | ||
549 | out_unlock: | |
550 | spin_unlock_bh(&man->lock); | |
551 | ||
552 | return idle; | |
553 | } | |
554 | ||
555 | /** | |
556 | * __vmw_cmdbuf_cur_flush - Flush the current command buffer for small kernel | |
557 | * command submissions | |
558 | * | |
559 | * @man: The command buffer manager. | |
560 | * | |
561 | * Flushes the current command buffer without allocating a new one. A new one | |
562 | * is automatically allocated when needed. Call with @man->cur_mutex held. | |
563 | */ | |
564 | static void __vmw_cmdbuf_cur_flush(struct vmw_cmdbuf_man *man) | |
565 | { | |
566 | struct vmw_cmdbuf_header *cur = man->cur; | |
567 | ||
568 | WARN_ON(!mutex_is_locked(&man->cur_mutex)); | |
569 | ||
570 | if (!cur) | |
571 | return; | |
572 | ||
573 | spin_lock_bh(&man->lock); | |
574 | if (man->cur_pos == 0) { | |
575 | __vmw_cmdbuf_header_free(cur); | |
576 | goto out_unlock; | |
577 | } | |
578 | ||
579 | man->cur->cb_header->length = man->cur_pos; | |
580 | vmw_cmdbuf_ctx_add(man, man->cur, SVGA_CB_CONTEXT_0); | |
581 | out_unlock: | |
582 | spin_unlock_bh(&man->lock); | |
583 | man->cur = NULL; | |
584 | man->cur_pos = 0; | |
585 | } | |
586 | ||
587 | /** | |
588 | * vmw_cmdbuf_cur_flush - Flush the current command buffer for small kernel | |
589 | * command submissions | |
590 | * | |
591 | * @man: The command buffer manager. | |
592 | * @interruptible: Whether to sleep interruptible when sleeping. | |
593 | * | |
594 | * Flushes the current command buffer without allocating a new one. A new one | |
595 | * is automatically allocated when needed. | |
596 | */ | |
597 | int vmw_cmdbuf_cur_flush(struct vmw_cmdbuf_man *man, | |
598 | bool interruptible) | |
599 | { | |
600 | int ret = vmw_cmdbuf_cur_lock(man, interruptible); | |
601 | ||
602 | if (ret) | |
603 | return ret; | |
604 | ||
605 | __vmw_cmdbuf_cur_flush(man); | |
606 | vmw_cmdbuf_cur_unlock(man); | |
607 | ||
608 | return 0; | |
609 | } | |
610 | ||
611 | /** | |
612 | * vmw_cmdbuf_idle - Wait for command buffer manager idle. | |
613 | * | |
614 | * @man: The command buffer manager. | |
615 | * @interruptible: Sleep interruptible while waiting. | |
616 | * @timeout: Time out after this many ticks. | |
617 | * | |
618 | * Wait until the command buffer manager has processed all command buffers, | |
619 | * or until a timeout occurs. If a timeout occurs, the function will return | |
620 | * -EBUSY. | |
621 | */ | |
622 | int vmw_cmdbuf_idle(struct vmw_cmdbuf_man *man, bool interruptible, | |
623 | unsigned long timeout) | |
624 | { | |
625 | int ret; | |
626 | ||
627 | ret = vmw_cmdbuf_cur_flush(man, interruptible); | |
628 | vmw_generic_waiter_add(man->dev_priv, | |
629 | SVGA_IRQFLAG_COMMAND_BUFFER, | |
630 | &man->dev_priv->cmdbuf_waiters); | |
631 | ||
632 | if (interruptible) { | |
633 | ret = wait_event_interruptible_timeout | |
634 | (man->idle_queue, vmw_cmdbuf_man_idle(man, true), | |
635 | timeout); | |
636 | } else { | |
637 | ret = wait_event_timeout | |
638 | (man->idle_queue, vmw_cmdbuf_man_idle(man, true), | |
639 | timeout); | |
640 | } | |
641 | vmw_generic_waiter_remove(man->dev_priv, | |
642 | SVGA_IRQFLAG_COMMAND_BUFFER, | |
643 | &man->dev_priv->cmdbuf_waiters); | |
644 | if (ret == 0) { | |
645 | if (!vmw_cmdbuf_man_idle(man, true)) | |
646 | ret = -EBUSY; | |
647 | else | |
648 | ret = 0; | |
649 | } | |
650 | if (ret > 0) | |
651 | ret = 0; | |
652 | ||
653 | return ret; | |
654 | } | |
655 | ||
656 | /** | |
657 | * vmw_cmdbuf_try_alloc - Try to allocate buffer space from the main pool. | |
658 | * | |
659 | * @man: The command buffer manager. | |
660 | * @info: Allocation info. Will hold the size on entry and allocated mm node | |
661 | * on successful return. | |
662 | * | |
663 | * Try to allocate buffer space from the main pool. Returns true if succeeded. | |
664 | * If a fatal error was hit, the error code is returned in @info->ret. | |
665 | */ | |
666 | static bool vmw_cmdbuf_try_alloc(struct vmw_cmdbuf_man *man, | |
667 | struct vmw_cmdbuf_alloc_info *info) | |
668 | { | |
669 | int ret; | |
670 | ||
9b590783 | 671 | if (info->done) |
3eab3d9e | 672 | return true; |
9b590783 TH |
673 | |
674 | memset(info->node, 0, sizeof(*info->node)); | |
3eab3d9e | 675 | spin_lock_bh(&man->lock); |
9b590783 TH |
676 | ret = drm_mm_insert_node_generic(&man->mm, info->node, info->page_size, |
677 | 0, 0, | |
3eab3d9e TH |
678 | DRM_MM_SEARCH_DEFAULT, |
679 | DRM_MM_CREATE_DEFAULT); | |
575f9c86 | 680 | if (ret) { |
09dc1387 | 681 | vmw_cmdbuf_man_process(man); |
575f9c86 TH |
682 | ret = drm_mm_insert_node_generic(&man->mm, info->node, |
683 | info->page_size, 0, 0, | |
684 | DRM_MM_SEARCH_DEFAULT, | |
685 | DRM_MM_CREATE_DEFAULT); | |
686 | } | |
687 | ||
3eab3d9e | 688 | spin_unlock_bh(&man->lock); |
9b590783 | 689 | info->done = !ret; |
3eab3d9e | 690 | |
9b590783 | 691 | return info->done; |
3eab3d9e TH |
692 | } |
693 | ||
694 | /** | |
695 | * vmw_cmdbuf_alloc_space - Allocate buffer space from the main pool. | |
696 | * | |
697 | * @man: The command buffer manager. | |
9b590783 | 698 | * @node: Pointer to pre-allocated range-manager node. |
3eab3d9e TH |
699 | * @size: The size of the allocation. |
700 | * @interruptible: Whether to sleep interruptible while waiting for space. | |
701 | * | |
702 | * This function allocates buffer space from the main pool, and if there is | |
703 | * no space available ATM, it turns on IRQ handling and sleeps waiting for it to | |
704 | * become available. | |
705 | */ | |
b9eb1a61 TH |
706 | static int vmw_cmdbuf_alloc_space(struct vmw_cmdbuf_man *man, |
707 | struct drm_mm_node *node, | |
708 | size_t size, | |
709 | bool interruptible) | |
3eab3d9e TH |
710 | { |
711 | struct vmw_cmdbuf_alloc_info info; | |
712 | ||
713 | info.page_size = PAGE_ALIGN(size) >> PAGE_SHIFT; | |
9b590783 TH |
714 | info.node = node; |
715 | info.done = false; | |
3eab3d9e TH |
716 | |
717 | /* | |
718 | * To prevent starvation of large requests, only one allocating call | |
719 | * at a time waiting for space. | |
720 | */ | |
721 | if (interruptible) { | |
722 | if (mutex_lock_interruptible(&man->space_mutex)) | |
9b590783 | 723 | return -ERESTARTSYS; |
3eab3d9e TH |
724 | } else { |
725 | mutex_lock(&man->space_mutex); | |
726 | } | |
727 | ||
728 | /* Try to allocate space without waiting. */ | |
9b590783 TH |
729 | if (vmw_cmdbuf_try_alloc(man, &info)) |
730 | goto out_unlock; | |
3eab3d9e TH |
731 | |
732 | vmw_generic_waiter_add(man->dev_priv, | |
733 | SVGA_IRQFLAG_COMMAND_BUFFER, | |
734 | &man->dev_priv->cmdbuf_waiters); | |
735 | ||
736 | if (interruptible) { | |
737 | int ret; | |
738 | ||
739 | ret = wait_event_interruptible | |
740 | (man->alloc_queue, vmw_cmdbuf_try_alloc(man, &info)); | |
741 | if (ret) { | |
742 | vmw_generic_waiter_remove | |
743 | (man->dev_priv, SVGA_IRQFLAG_COMMAND_BUFFER, | |
744 | &man->dev_priv->cmdbuf_waiters); | |
745 | mutex_unlock(&man->space_mutex); | |
9b590783 | 746 | return ret; |
3eab3d9e TH |
747 | } |
748 | } else { | |
749 | wait_event(man->alloc_queue, vmw_cmdbuf_try_alloc(man, &info)); | |
750 | } | |
751 | vmw_generic_waiter_remove(man->dev_priv, | |
752 | SVGA_IRQFLAG_COMMAND_BUFFER, | |
753 | &man->dev_priv->cmdbuf_waiters); | |
9b590783 TH |
754 | |
755 | out_unlock: | |
3eab3d9e | 756 | mutex_unlock(&man->space_mutex); |
3eab3d9e | 757 | |
9b590783 | 758 | return 0; |
3eab3d9e TH |
759 | } |
760 | ||
761 | /** | |
762 | * vmw_cmdbuf_space_pool - Set up a command buffer header with command buffer | |
763 | * space from the main pool. | |
764 | * | |
765 | * @man: The command buffer manager. | |
766 | * @header: Pointer to the header to set up. | |
767 | * @size: The requested size of the buffer space. | |
768 | * @interruptible: Whether to sleep interruptible while waiting for space. | |
769 | */ | |
770 | static int vmw_cmdbuf_space_pool(struct vmw_cmdbuf_man *man, | |
771 | struct vmw_cmdbuf_header *header, | |
772 | size_t size, | |
773 | bool interruptible) | |
774 | { | |
775 | SVGACBHeader *cb_hdr; | |
776 | size_t offset; | |
777 | int ret; | |
778 | ||
779 | if (!man->has_pool) | |
780 | return -ENOMEM; | |
781 | ||
9b590783 | 782 | ret = vmw_cmdbuf_alloc_space(man, &header->node, size, interruptible); |
3eab3d9e | 783 | |
9b590783 TH |
784 | if (ret) |
785 | return ret; | |
3eab3d9e TH |
786 | |
787 | header->cb_header = dma_pool_alloc(man->headers, GFP_KERNEL, | |
788 | &header->handle); | |
789 | if (!header->cb_header) { | |
790 | ret = -ENOMEM; | |
791 | goto out_no_cb_header; | |
792 | } | |
793 | ||
9b590783 | 794 | header->size = header->node.size << PAGE_SHIFT; |
3eab3d9e | 795 | cb_hdr = header->cb_header; |
9b590783 | 796 | offset = header->node.start << PAGE_SHIFT; |
3eab3d9e TH |
797 | header->cmd = man->map + offset; |
798 | memset(cb_hdr, 0, sizeof(*cb_hdr)); | |
799 | if (man->using_mob) { | |
800 | cb_hdr->flags = SVGA_CB_FLAG_MOB; | |
801 | cb_hdr->ptr.mob.mobid = man->cmd_space->mem.start; | |
802 | cb_hdr->ptr.mob.mobOffset = offset; | |
803 | } else { | |
804 | cb_hdr->ptr.pa = (u64)man->handle + (u64)offset; | |
805 | } | |
806 | ||
807 | return 0; | |
808 | ||
809 | out_no_cb_header: | |
810 | spin_lock_bh(&man->lock); | |
9b590783 | 811 | drm_mm_remove_node(&header->node); |
3eab3d9e | 812 | spin_unlock_bh(&man->lock); |
3eab3d9e TH |
813 | |
814 | return ret; | |
815 | } | |
816 | ||
817 | /** | |
818 | * vmw_cmdbuf_space_inline - Set up a command buffer header with | |
819 | * inline command buffer space. | |
820 | * | |
821 | * @man: The command buffer manager. | |
822 | * @header: Pointer to the header to set up. | |
823 | * @size: The requested size of the buffer space. | |
824 | */ | |
825 | static int vmw_cmdbuf_space_inline(struct vmw_cmdbuf_man *man, | |
826 | struct vmw_cmdbuf_header *header, | |
827 | int size) | |
828 | { | |
829 | struct vmw_cmdbuf_dheader *dheader; | |
830 | SVGACBHeader *cb_hdr; | |
831 | ||
832 | if (WARN_ON_ONCE(size > VMW_CMDBUF_INLINE_SIZE)) | |
833 | return -ENOMEM; | |
834 | ||
835 | dheader = dma_pool_alloc(man->dheaders, GFP_KERNEL, | |
836 | &header->handle); | |
837 | if (!dheader) | |
838 | return -ENOMEM; | |
839 | ||
840 | header->inline_space = true; | |
841 | header->size = VMW_CMDBUF_INLINE_SIZE; | |
842 | cb_hdr = &dheader->cb_header; | |
843 | header->cb_header = cb_hdr; | |
844 | header->cmd = dheader->cmd; | |
845 | memset(dheader, 0, sizeof(*dheader)); | |
846 | cb_hdr->status = SVGA_CB_STATUS_NONE; | |
847 | cb_hdr->flags = SVGA_CB_FLAG_NONE; | |
848 | cb_hdr->ptr.pa = (u64)header->handle + | |
849 | (u64)offsetof(struct vmw_cmdbuf_dheader, cmd); | |
850 | ||
851 | return 0; | |
852 | } | |
853 | ||
854 | /** | |
855 | * vmw_cmdbuf_alloc - Allocate a command buffer header complete with | |
856 | * command buffer space. | |
857 | * | |
858 | * @man: The command buffer manager. | |
859 | * @size: The requested size of the buffer space. | |
860 | * @interruptible: Whether to sleep interruptible while waiting for space. | |
861 | * @p_header: points to a header pointer to populate on successful return. | |
862 | * | |
863 | * Returns a pointer to command buffer space if successful. Otherwise | |
864 | * returns an error pointer. The header pointer returned in @p_header should | |
865 | * be used for upcoming calls to vmw_cmdbuf_reserve() and vmw_cmdbuf_commit(). | |
866 | */ | |
867 | void *vmw_cmdbuf_alloc(struct vmw_cmdbuf_man *man, | |
868 | size_t size, bool interruptible, | |
869 | struct vmw_cmdbuf_header **p_header) | |
870 | { | |
871 | struct vmw_cmdbuf_header *header; | |
872 | int ret = 0; | |
873 | ||
874 | *p_header = NULL; | |
875 | ||
876 | header = kzalloc(sizeof(*header), GFP_KERNEL); | |
877 | if (!header) | |
878 | return ERR_PTR(-ENOMEM); | |
879 | ||
880 | if (size <= VMW_CMDBUF_INLINE_SIZE) | |
881 | ret = vmw_cmdbuf_space_inline(man, header, size); | |
882 | else | |
883 | ret = vmw_cmdbuf_space_pool(man, header, size, interruptible); | |
884 | ||
885 | if (ret) { | |
886 | kfree(header); | |
887 | return ERR_PTR(ret); | |
888 | } | |
889 | ||
890 | header->man = man; | |
891 | INIT_LIST_HEAD(&header->list); | |
892 | header->cb_header->status = SVGA_CB_STATUS_NONE; | |
893 | *p_header = header; | |
894 | ||
895 | return header->cmd; | |
896 | } | |
897 | ||
898 | /** | |
899 | * vmw_cmdbuf_reserve_cur - Reserve space for commands in the current | |
900 | * command buffer. | |
901 | * | |
902 | * @man: The command buffer manager. | |
903 | * @size: The requested size of the commands. | |
904 | * @ctx_id: The context id if any. Otherwise set to SVGA3D_REG_INVALID. | |
905 | * @interruptible: Whether to sleep interruptible while waiting for space. | |
906 | * | |
907 | * Returns a pointer to command buffer space if successful. Otherwise | |
908 | * returns an error pointer. | |
909 | */ | |
910 | static void *vmw_cmdbuf_reserve_cur(struct vmw_cmdbuf_man *man, | |
911 | size_t size, | |
912 | int ctx_id, | |
913 | bool interruptible) | |
914 | { | |
915 | struct vmw_cmdbuf_header *cur; | |
916 | void *ret; | |
917 | ||
918 | if (vmw_cmdbuf_cur_lock(man, interruptible)) | |
919 | return ERR_PTR(-ERESTARTSYS); | |
920 | ||
921 | cur = man->cur; | |
922 | if (cur && (size + man->cur_pos > cur->size || | |
d80efd5c TH |
923 | ((cur->cb_header->flags & SVGA_CB_FLAG_DX_CONTEXT) && |
924 | ctx_id != cur->cb_header->dxContext))) | |
3eab3d9e TH |
925 | __vmw_cmdbuf_cur_flush(man); |
926 | ||
927 | if (!man->cur) { | |
928 | ret = vmw_cmdbuf_alloc(man, | |
929 | max_t(size_t, size, man->default_size), | |
930 | interruptible, &man->cur); | |
931 | if (IS_ERR(ret)) { | |
932 | vmw_cmdbuf_cur_unlock(man); | |
933 | return ret; | |
934 | } | |
935 | ||
936 | cur = man->cur; | |
937 | } | |
938 | ||
939 | if (ctx_id != SVGA3D_INVALID_ID) { | |
940 | cur->cb_header->flags |= SVGA_CB_FLAG_DX_CONTEXT; | |
941 | cur->cb_header->dxContext = ctx_id; | |
942 | } | |
943 | ||
944 | cur->reserved = size; | |
945 | ||
946 | return (void *) (man->cur->cmd + man->cur_pos); | |
947 | } | |
948 | ||
949 | /** | |
950 | * vmw_cmdbuf_commit_cur - Commit commands in the current command buffer. | |
951 | * | |
952 | * @man: The command buffer manager. | |
953 | * @size: The size of the commands actually written. | |
954 | * @flush: Whether to flush the command buffer immediately. | |
955 | */ | |
956 | static void vmw_cmdbuf_commit_cur(struct vmw_cmdbuf_man *man, | |
957 | size_t size, bool flush) | |
958 | { | |
959 | struct vmw_cmdbuf_header *cur = man->cur; | |
960 | ||
961 | WARN_ON(!mutex_is_locked(&man->cur_mutex)); | |
962 | ||
963 | WARN_ON(size > cur->reserved); | |
964 | man->cur_pos += size; | |
965 | if (!size) | |
966 | cur->cb_header->flags &= ~SVGA_CB_FLAG_DX_CONTEXT; | |
967 | if (flush) | |
968 | __vmw_cmdbuf_cur_flush(man); | |
969 | vmw_cmdbuf_cur_unlock(man); | |
970 | } | |
971 | ||
972 | /** | |
973 | * vmw_cmdbuf_reserve - Reserve space for commands in a command buffer. | |
974 | * | |
975 | * @man: The command buffer manager. | |
976 | * @size: The requested size of the commands. | |
977 | * @ctx_id: The context id if any. Otherwise set to SVGA3D_REG_INVALID. | |
978 | * @interruptible: Whether to sleep interruptible while waiting for space. | |
979 | * @header: Header of the command buffer. NULL if the current command buffer | |
980 | * should be used. | |
981 | * | |
982 | * Returns a pointer to command buffer space if successful. Otherwise | |
983 | * returns an error pointer. | |
984 | */ | |
985 | void *vmw_cmdbuf_reserve(struct vmw_cmdbuf_man *man, size_t size, | |
986 | int ctx_id, bool interruptible, | |
987 | struct vmw_cmdbuf_header *header) | |
988 | { | |
989 | if (!header) | |
990 | return vmw_cmdbuf_reserve_cur(man, size, ctx_id, interruptible); | |
991 | ||
992 | if (size > header->size) | |
993 | return ERR_PTR(-EINVAL); | |
994 | ||
995 | if (ctx_id != SVGA3D_INVALID_ID) { | |
996 | header->cb_header->flags |= SVGA_CB_FLAG_DX_CONTEXT; | |
997 | header->cb_header->dxContext = ctx_id; | |
998 | } | |
999 | ||
1000 | header->reserved = size; | |
1001 | return header->cmd; | |
1002 | } | |
1003 | ||
1004 | /** | |
1005 | * vmw_cmdbuf_commit - Commit commands in a command buffer. | |
1006 | * | |
1007 | * @man: The command buffer manager. | |
1008 | * @size: The size of the commands actually written. | |
1009 | * @header: Header of the command buffer. NULL if the current command buffer | |
1010 | * should be used. | |
1011 | * @flush: Whether to flush the command buffer immediately. | |
1012 | */ | |
1013 | void vmw_cmdbuf_commit(struct vmw_cmdbuf_man *man, size_t size, | |
1014 | struct vmw_cmdbuf_header *header, bool flush) | |
1015 | { | |
1016 | if (!header) { | |
1017 | vmw_cmdbuf_commit_cur(man, size, flush); | |
1018 | return; | |
1019 | } | |
1020 | ||
1021 | (void) vmw_cmdbuf_cur_lock(man, false); | |
1022 | __vmw_cmdbuf_cur_flush(man); | |
1023 | WARN_ON(size > header->reserved); | |
1024 | man->cur = header; | |
1025 | man->cur_pos = size; | |
1026 | if (!size) | |
1027 | header->cb_header->flags &= ~SVGA_CB_FLAG_DX_CONTEXT; | |
1028 | if (flush) | |
1029 | __vmw_cmdbuf_cur_flush(man); | |
1030 | vmw_cmdbuf_cur_unlock(man); | |
1031 | } | |
1032 | ||
1033 | /** | |
1034 | * vmw_cmdbuf_tasklet_schedule - Schedule the interrupt handler bottom half. | |
1035 | * | |
1036 | * @man: The command buffer manager. | |
1037 | */ | |
1038 | void vmw_cmdbuf_tasklet_schedule(struct vmw_cmdbuf_man *man) | |
1039 | { | |
1040 | if (!man) | |
1041 | return; | |
1042 | ||
1043 | tasklet_schedule(&man->tasklet); | |
1044 | } | |
1045 | ||
1046 | /** | |
1047 | * vmw_cmdbuf_send_device_command - Send a command through the device context. | |
1048 | * | |
1049 | * @man: The command buffer manager. | |
1050 | * @command: Pointer to the command to send. | |
1051 | * @size: Size of the command. | |
1052 | * | |
1053 | * Synchronously sends a device context command. | |
1054 | */ | |
1055 | static int vmw_cmdbuf_send_device_command(struct vmw_cmdbuf_man *man, | |
1056 | const void *command, | |
1057 | size_t size) | |
1058 | { | |
1059 | struct vmw_cmdbuf_header *header; | |
1060 | int status; | |
1061 | void *cmd = vmw_cmdbuf_alloc(man, size, false, &header); | |
1062 | ||
1063 | if (IS_ERR(cmd)) | |
1064 | return PTR_ERR(cmd); | |
1065 | ||
1066 | memcpy(cmd, command, size); | |
1067 | header->cb_header->length = size; | |
1068 | header->cb_context = SVGA_CB_CONTEXT_DEVICE; | |
1069 | spin_lock_bh(&man->lock); | |
1070 | status = vmw_cmdbuf_header_submit(header); | |
1071 | spin_unlock_bh(&man->lock); | |
1072 | vmw_cmdbuf_header_free(header); | |
1073 | ||
1074 | if (status != SVGA_CB_STATUS_COMPLETED) { | |
1075 | DRM_ERROR("Device context command failed with status %d\n", | |
1076 | status); | |
1077 | return -EINVAL; | |
1078 | } | |
1079 | ||
1080 | return 0; | |
1081 | } | |
1082 | ||
1083 | /** | |
1084 | * vmw_cmdbuf_startstop - Send a start / stop command through the device | |
1085 | * context. | |
1086 | * | |
1087 | * @man: The command buffer manager. | |
1088 | * @enable: Whether to enable or disable the context. | |
1089 | * | |
1090 | * Synchronously sends a device start / stop context command. | |
1091 | */ | |
1092 | static int vmw_cmdbuf_startstop(struct vmw_cmdbuf_man *man, | |
1093 | bool enable) | |
1094 | { | |
1095 | struct { | |
1096 | uint32 id; | |
1097 | SVGADCCmdStartStop body; | |
1098 | } __packed cmd; | |
1099 | ||
1100 | cmd.id = SVGA_DC_CMD_START_STOP_CONTEXT; | |
1101 | cmd.body.enable = (enable) ? 1 : 0; | |
1102 | cmd.body.context = SVGA_CB_CONTEXT_0; | |
1103 | ||
1104 | return vmw_cmdbuf_send_device_command(man, &cmd, sizeof(cmd)); | |
1105 | } | |
1106 | ||
1107 | /** | |
1108 | * vmw_cmdbuf_set_pool_size - Set command buffer manager sizes | |
1109 | * | |
1110 | * @man: The command buffer manager. | |
1111 | * @size: The size of the main space pool. | |
1112 | * @default_size: The default size of the command buffer for small kernel | |
1113 | * submissions. | |
1114 | * | |
1115 | * Set the size and allocate the main command buffer space pool, | |
1116 | * as well as the default size of the command buffer for | |
1117 | * small kernel submissions. If successful, this enables large command | |
1118 | * submissions. Note that this function requires that rudimentary command | |
1119 | * submission is already available and that the MOB memory manager is alive. | |
1120 | * Returns 0 on success. Negative error code on failure. | |
1121 | */ | |
1122 | int vmw_cmdbuf_set_pool_size(struct vmw_cmdbuf_man *man, | |
1123 | size_t size, size_t default_size) | |
1124 | { | |
1125 | struct vmw_private *dev_priv = man->dev_priv; | |
1126 | bool dummy; | |
1127 | int ret; | |
1128 | ||
1129 | if (man->has_pool) | |
1130 | return -EINVAL; | |
1131 | ||
1132 | /* First, try to allocate a huge chunk of DMA memory */ | |
1133 | size = PAGE_ALIGN(size); | |
1134 | man->map = dma_alloc_coherent(&dev_priv->dev->pdev->dev, size, | |
1135 | &man->handle, GFP_KERNEL); | |
1136 | if (man->map) { | |
1137 | man->using_mob = false; | |
1138 | } else { | |
1139 | /* | |
1140 | * DMA memory failed. If we can have command buffers in a | |
1141 | * MOB, try to use that instead. Note that this will | |
1142 | * actually call into the already enabled manager, when | |
1143 | * binding the MOB. | |
1144 | */ | |
8ce75f8a | 1145 | if (!(dev_priv->capabilities & SVGA_CAP_DX)) |
3eab3d9e TH |
1146 | return -ENOMEM; |
1147 | ||
1148 | ret = ttm_bo_create(&dev_priv->bdev, size, ttm_bo_type_device, | |
1149 | &vmw_mob_ne_placement, 0, false, NULL, | |
1150 | &man->cmd_space); | |
1151 | if (ret) | |
1152 | return ret; | |
1153 | ||
1154 | man->using_mob = true; | |
1155 | ret = ttm_bo_kmap(man->cmd_space, 0, size >> PAGE_SHIFT, | |
1156 | &man->map_obj); | |
1157 | if (ret) | |
1158 | goto out_no_map; | |
1159 | ||
1160 | man->map = ttm_kmap_obj_virtual(&man->map_obj, &dummy); | |
1161 | } | |
1162 | ||
1163 | man->size = size; | |
1164 | drm_mm_init(&man->mm, 0, size >> PAGE_SHIFT); | |
1165 | ||
1166 | man->has_pool = true; | |
09dc1387 TH |
1167 | |
1168 | /* | |
1169 | * For now, set the default size to VMW_CMDBUF_INLINE_SIZE to | |
1170 | * prevent deadlocks from happening when vmw_cmdbuf_space_pool() | |
1171 | * needs to wait for space and we block on further command | |
1172 | * submissions to be able to free up space. | |
1173 | */ | |
1174 | man->default_size = VMW_CMDBUF_INLINE_SIZE; | |
3eab3d9e TH |
1175 | DRM_INFO("Using command buffers with %s pool.\n", |
1176 | (man->using_mob) ? "MOB" : "DMA"); | |
1177 | ||
1178 | return 0; | |
1179 | ||
1180 | out_no_map: | |
1181 | if (man->using_mob) | |
1182 | ttm_bo_unref(&man->cmd_space); | |
1183 | ||
1184 | return ret; | |
1185 | } | |
1186 | ||
1187 | /** | |
1188 | * vmw_cmdbuf_man_create: Create a command buffer manager and enable it for | |
1189 | * inline command buffer submissions only. | |
1190 | * | |
1191 | * @dev_priv: Pointer to device private structure. | |
1192 | * | |
1193 | * Returns a pointer to a cummand buffer manager to success or error pointer | |
1194 | * on failure. The command buffer manager will be enabled for submissions of | |
1195 | * size VMW_CMDBUF_INLINE_SIZE only. | |
1196 | */ | |
1197 | struct vmw_cmdbuf_man *vmw_cmdbuf_man_create(struct vmw_private *dev_priv) | |
1198 | { | |
1199 | struct vmw_cmdbuf_man *man; | |
1200 | struct vmw_cmdbuf_context *ctx; | |
1201 | int i; | |
1202 | int ret; | |
1203 | ||
1204 | if (!(dev_priv->capabilities & SVGA_CAP_COMMAND_BUFFERS)) | |
1205 | return ERR_PTR(-ENOSYS); | |
1206 | ||
1207 | man = kzalloc(sizeof(*man), GFP_KERNEL); | |
1208 | if (!man) | |
1209 | return ERR_PTR(-ENOMEM); | |
1210 | ||
1211 | man->headers = dma_pool_create("vmwgfx cmdbuf", | |
1212 | &dev_priv->dev->pdev->dev, | |
1213 | sizeof(SVGACBHeader), | |
1214 | 64, PAGE_SIZE); | |
1215 | if (!man->headers) { | |
1216 | ret = -ENOMEM; | |
1217 | goto out_no_pool; | |
1218 | } | |
1219 | ||
1220 | man->dheaders = dma_pool_create("vmwgfx inline cmdbuf", | |
1221 | &dev_priv->dev->pdev->dev, | |
1222 | sizeof(struct vmw_cmdbuf_dheader), | |
1223 | 64, PAGE_SIZE); | |
1224 | if (!man->dheaders) { | |
1225 | ret = -ENOMEM; | |
1226 | goto out_no_dpool; | |
1227 | } | |
1228 | ||
1229 | for_each_cmdbuf_ctx(man, i, ctx) | |
1230 | vmw_cmdbuf_ctx_init(ctx); | |
1231 | ||
1232 | INIT_LIST_HEAD(&man->error); | |
1233 | spin_lock_init(&man->lock); | |
1234 | mutex_init(&man->cur_mutex); | |
1235 | mutex_init(&man->space_mutex); | |
1236 | tasklet_init(&man->tasklet, vmw_cmdbuf_man_tasklet, | |
1237 | (unsigned long) man); | |
1238 | man->default_size = VMW_CMDBUF_INLINE_SIZE; | |
1239 | init_waitqueue_head(&man->alloc_queue); | |
1240 | init_waitqueue_head(&man->idle_queue); | |
1241 | man->dev_priv = dev_priv; | |
1242 | man->max_hw_submitted = SVGA_CB_MAX_QUEUED_PER_CONTEXT - 1; | |
1243 | INIT_WORK(&man->work, &vmw_cmdbuf_work_func); | |
1244 | vmw_generic_waiter_add(dev_priv, SVGA_IRQFLAG_ERROR, | |
1245 | &dev_priv->error_waiters); | |
1246 | ret = vmw_cmdbuf_startstop(man, true); | |
1247 | if (ret) { | |
1248 | DRM_ERROR("Failed starting command buffer context 0.\n"); | |
1249 | vmw_cmdbuf_man_destroy(man); | |
1250 | return ERR_PTR(ret); | |
1251 | } | |
1252 | ||
1253 | return man; | |
1254 | ||
1255 | out_no_dpool: | |
1256 | dma_pool_destroy(man->headers); | |
1257 | out_no_pool: | |
1258 | kfree(man); | |
1259 | ||
1260 | return ERR_PTR(ret); | |
1261 | } | |
1262 | ||
1263 | /** | |
1264 | * vmw_cmdbuf_remove_pool - Take down the main buffer space pool. | |
1265 | * | |
1266 | * @man: Pointer to a command buffer manager. | |
1267 | * | |
1268 | * This function removes the main buffer space pool, and should be called | |
1269 | * before MOB memory management is removed. When this function has been called, | |
1270 | * only small command buffer submissions of size VMW_CMDBUF_INLINE_SIZE or | |
1271 | * less are allowed, and the default size of the command buffer for small kernel | |
1272 | * submissions is also set to this size. | |
1273 | */ | |
1274 | void vmw_cmdbuf_remove_pool(struct vmw_cmdbuf_man *man) | |
1275 | { | |
1276 | if (!man->has_pool) | |
1277 | return; | |
1278 | ||
1279 | man->has_pool = false; | |
1280 | man->default_size = VMW_CMDBUF_INLINE_SIZE; | |
1281 | (void) vmw_cmdbuf_idle(man, false, 10*HZ); | |
1282 | if (man->using_mob) { | |
1283 | (void) ttm_bo_kunmap(&man->map_obj); | |
1284 | ttm_bo_unref(&man->cmd_space); | |
1285 | } else { | |
1286 | dma_free_coherent(&man->dev_priv->dev->pdev->dev, | |
1287 | man->size, man->map, man->handle); | |
1288 | } | |
1289 | } | |
1290 | ||
1291 | /** | |
1292 | * vmw_cmdbuf_man_destroy - Take down a command buffer manager. | |
1293 | * | |
1294 | * @man: Pointer to a command buffer manager. | |
1295 | * | |
1296 | * This function idles and then destroys a command buffer manager. | |
1297 | */ | |
1298 | void vmw_cmdbuf_man_destroy(struct vmw_cmdbuf_man *man) | |
1299 | { | |
1300 | WARN_ON_ONCE(man->has_pool); | |
1301 | (void) vmw_cmdbuf_idle(man, false, 10*HZ); | |
1302 | if (vmw_cmdbuf_startstop(man, false)) | |
1303 | DRM_ERROR("Failed stopping command buffer context 0.\n"); | |
1304 | ||
1305 | vmw_generic_waiter_remove(man->dev_priv, SVGA_IRQFLAG_ERROR, | |
1306 | &man->dev_priv->error_waiters); | |
1307 | tasklet_kill(&man->tasklet); | |
1308 | (void) cancel_work_sync(&man->work); | |
1309 | dma_pool_destroy(man->dheaders); | |
1310 | dma_pool_destroy(man->headers); | |
1311 | mutex_destroy(&man->cur_mutex); | |
1312 | mutex_destroy(&man->space_mutex); | |
1313 | kfree(man); | |
1314 | } |