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dff96888 | 1 | // SPDX-License-Identifier: GPL-2.0 OR MIT |
3eab3d9e TH |
2 | /************************************************************************** |
3 | * | |
dff96888 | 4 | * Copyright 2015 VMware, Inc., Palo Alto, CA., USA |
3eab3d9e TH |
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 | ||
008be682 MY |
28 | #include <drm/ttm/ttm_bo_api.h> |
29 | ||
3eab3d9e | 30 | #include "vmwgfx_drv.h" |
3eab3d9e TH |
31 | |
32 | /* | |
33 | * Size of inline command buffers. Try to make sure that a page size is a | |
34 | * multiple of the DMA pool allocation size. | |
35 | */ | |
36 | #define VMW_CMDBUF_INLINE_ALIGN 64 | |
9b590783 TH |
37 | #define VMW_CMDBUF_INLINE_SIZE \ |
38 | (1024 - ALIGN(sizeof(SVGACBHeader), VMW_CMDBUF_INLINE_ALIGN)) | |
3eab3d9e TH |
39 | |
40 | /** | |
41 | * struct vmw_cmdbuf_context - Command buffer context queues | |
42 | * | |
43 | * @submitted: List of command buffers that have been submitted to the | |
44 | * manager but not yet submitted to hardware. | |
45 | * @hw_submitted: List of command buffers submitted to hardware. | |
46 | * @preempted: List of preempted command buffers. | |
47 | * @num_hw_submitted: Number of buffers currently being processed by hardware | |
48 | */ | |
49 | struct vmw_cmdbuf_context { | |
50 | struct list_head submitted; | |
51 | struct list_head hw_submitted; | |
52 | struct list_head preempted; | |
53 | unsigned num_hw_submitted; | |
65b97a2b | 54 | bool block_submission; |
3eab3d9e TH |
55 | }; |
56 | ||
57 | /** | |
58 | * struct vmw_cmdbuf_man: - Command buffer manager | |
59 | * | |
60 | * @cur_mutex: Mutex protecting the command buffer used for incremental small | |
61 | * kernel command submissions, @cur. | |
62 | * @space_mutex: Mutex to protect against starvation when we allocate | |
63 | * main pool buffer space. | |
65b97a2b TH |
64 | * @error_mutex: Mutex to serialize the work queue error handling. |
65 | * Note this is not needed if the same workqueue handler | |
66 | * can't race with itself... | |
3eab3d9e TH |
67 | * @work: A struct work_struct implementeing command buffer error handling. |
68 | * Immutable. | |
69 | * @dev_priv: Pointer to the device private struct. Immutable. | |
70 | * @ctx: Array of command buffer context queues. The queues and the context | |
71 | * data is protected by @lock. | |
72 | * @error: List of command buffers that have caused device errors. | |
73 | * Protected by @lock. | |
74 | * @mm: Range manager for the command buffer space. Manager allocations and | |
75 | * frees are protected by @lock. | |
76 | * @cmd_space: Buffer object for the command buffer space, unless we were | |
77 | * able to make a contigous coherent DMA memory allocation, @handle. Immutable. | |
78 | * @map_obj: Mapping state for @cmd_space. Immutable. | |
79 | * @map: Pointer to command buffer space. May be a mapped buffer object or | |
80 | * a contigous coherent DMA memory allocation. Immutable. | |
81 | * @cur: Command buffer for small kernel command submissions. Protected by | |
82 | * the @cur_mutex. | |
83 | * @cur_pos: Space already used in @cur. Protected by @cur_mutex. | |
84 | * @default_size: Default size for the @cur command buffer. Immutable. | |
85 | * @max_hw_submitted: Max number of in-flight command buffers the device can | |
86 | * handle. Immutable. | |
87 | * @lock: Spinlock protecting command submission queues. | |
88 | * @header: Pool of DMA memory for device command buffer headers. | |
89 | * Internal protection. | |
90 | * @dheaders: Pool of DMA memory for device command buffer headers with trailing | |
91 | * space for inline data. Internal protection. | |
3eab3d9e TH |
92 | * @alloc_queue: Wait queue for processes waiting to allocate command buffer |
93 | * space. | |
94 | * @idle_queue: Wait queue for processes waiting for command buffer idle. | |
95 | * @irq_on: Whether the process function has requested irq to be turned on. | |
96 | * Protected by @lock. | |
97 | * @using_mob: Whether the command buffer space is a MOB or a contigous DMA | |
98 | * allocation. Immutable. | |
99 | * @has_pool: Has a large pool of DMA memory which allows larger allocations. | |
100 | * Typically this is false only during bootstrap. | |
101 | * @handle: DMA address handle for the command buffer space if @using_mob is | |
102 | * false. Immutable. | |
103 | * @size: The size of the command buffer space. Immutable. | |
dc366364 | 104 | * @num_contexts: Number of contexts actually enabled. |
3eab3d9e TH |
105 | */ |
106 | struct vmw_cmdbuf_man { | |
107 | struct mutex cur_mutex; | |
108 | struct mutex space_mutex; | |
65b97a2b | 109 | struct mutex error_mutex; |
3eab3d9e TH |
110 | struct work_struct work; |
111 | struct vmw_private *dev_priv; | |
112 | struct vmw_cmdbuf_context ctx[SVGA_CB_CONTEXT_MAX]; | |
113 | struct list_head error; | |
114 | struct drm_mm mm; | |
115 | struct ttm_buffer_object *cmd_space; | |
116 | struct ttm_bo_kmap_obj map_obj; | |
117 | u8 *map; | |
118 | struct vmw_cmdbuf_header *cur; | |
119 | size_t cur_pos; | |
120 | size_t default_size; | |
121 | unsigned max_hw_submitted; | |
122 | spinlock_t lock; | |
123 | struct dma_pool *headers; | |
124 | struct dma_pool *dheaders; | |
3eab3d9e TH |
125 | wait_queue_head_t alloc_queue; |
126 | wait_queue_head_t idle_queue; | |
127 | bool irq_on; | |
128 | bool using_mob; | |
129 | bool has_pool; | |
130 | dma_addr_t handle; | |
131 | size_t size; | |
dc366364 | 132 | u32 num_contexts; |
3eab3d9e TH |
133 | }; |
134 | ||
135 | /** | |
136 | * struct vmw_cmdbuf_header - Command buffer metadata | |
137 | * | |
138 | * @man: The command buffer manager. | |
139 | * @cb_header: Device command buffer header, allocated from a DMA pool. | |
140 | * @cb_context: The device command buffer context. | |
141 | * @list: List head for attaching to the manager lists. | |
142 | * @node: The range manager node. | |
143 | * @handle. The DMA address of @cb_header. Handed to the device on command | |
144 | * buffer submission. | |
145 | * @cmd: Pointer to the command buffer space of this buffer. | |
146 | * @size: Size of the command buffer space of this buffer. | |
147 | * @reserved: Reserved space of this buffer. | |
148 | * @inline_space: Whether inline command buffer space is used. | |
149 | */ | |
150 | struct vmw_cmdbuf_header { | |
151 | struct vmw_cmdbuf_man *man; | |
152 | SVGACBHeader *cb_header; | |
153 | SVGACBContext cb_context; | |
154 | struct list_head list; | |
9b590783 | 155 | struct drm_mm_node node; |
3eab3d9e TH |
156 | dma_addr_t handle; |
157 | u8 *cmd; | |
158 | size_t size; | |
159 | size_t reserved; | |
160 | bool inline_space; | |
161 | }; | |
162 | ||
163 | /** | |
164 | * struct vmw_cmdbuf_dheader - Device command buffer header with inline | |
165 | * command buffer space. | |
166 | * | |
167 | * @cb_header: Device command buffer header. | |
168 | * @cmd: Inline command buffer space. | |
169 | */ | |
170 | struct vmw_cmdbuf_dheader { | |
171 | SVGACBHeader cb_header; | |
172 | u8 cmd[VMW_CMDBUF_INLINE_SIZE] __aligned(VMW_CMDBUF_INLINE_ALIGN); | |
173 | }; | |
174 | ||
175 | /** | |
176 | * struct vmw_cmdbuf_alloc_info - Command buffer space allocation metadata | |
177 | * | |
178 | * @page_size: Size of requested command buffer space in pages. | |
9b590783 TH |
179 | * @node: Pointer to the range manager node. |
180 | * @done: True if this allocation has succeeded. | |
3eab3d9e TH |
181 | */ |
182 | struct vmw_cmdbuf_alloc_info { | |
183 | size_t page_size; | |
184 | struct drm_mm_node *node; | |
9b590783 | 185 | bool done; |
3eab3d9e TH |
186 | }; |
187 | ||
188 | /* Loop over each context in the command buffer manager. */ | |
65b97a2b | 189 | #define for_each_cmdbuf_ctx(_man, _i, _ctx) \ |
dc366364 | 190 | for (_i = 0, _ctx = &(_man)->ctx[0]; (_i) < (_man)->num_contexts; \ |
3eab3d9e TH |
191 | ++(_i), ++(_ctx)) |
192 | ||
65b97a2b TH |
193 | static int vmw_cmdbuf_startstop(struct vmw_cmdbuf_man *man, u32 context, |
194 | bool enable); | |
195 | static int vmw_cmdbuf_preempt(struct vmw_cmdbuf_man *man, u32 context); | |
3eab3d9e TH |
196 | |
197 | /** | |
198 | * vmw_cmdbuf_cur_lock - Helper to lock the cur_mutex. | |
199 | * | |
200 | * @man: The range manager. | |
201 | * @interruptible: Whether to wait interruptible when locking. | |
202 | */ | |
203 | static int vmw_cmdbuf_cur_lock(struct vmw_cmdbuf_man *man, bool interruptible) | |
204 | { | |
205 | if (interruptible) { | |
206 | if (mutex_lock_interruptible(&man->cur_mutex)) | |
207 | return -ERESTARTSYS; | |
208 | } else { | |
209 | mutex_lock(&man->cur_mutex); | |
210 | } | |
211 | ||
212 | return 0; | |
213 | } | |
214 | ||
215 | /** | |
216 | * vmw_cmdbuf_cur_unlock - Helper to unlock the cur_mutex. | |
217 | * | |
218 | * @man: The range manager. | |
219 | */ | |
220 | static void vmw_cmdbuf_cur_unlock(struct vmw_cmdbuf_man *man) | |
221 | { | |
222 | mutex_unlock(&man->cur_mutex); | |
223 | } | |
224 | ||
225 | /** | |
226 | * vmw_cmdbuf_header_inline_free - Free a struct vmw_cmdbuf_header that has | |
227 | * been used for the device context with inline command buffers. | |
228 | * Need not be called locked. | |
229 | * | |
230 | * @header: Pointer to the header to free. | |
231 | */ | |
232 | static void vmw_cmdbuf_header_inline_free(struct vmw_cmdbuf_header *header) | |
233 | { | |
234 | struct vmw_cmdbuf_dheader *dheader; | |
235 | ||
236 | if (WARN_ON_ONCE(!header->inline_space)) | |
237 | return; | |
238 | ||
239 | dheader = container_of(header->cb_header, struct vmw_cmdbuf_dheader, | |
240 | cb_header); | |
241 | dma_pool_free(header->man->dheaders, dheader, header->handle); | |
242 | kfree(header); | |
243 | } | |
244 | ||
245 | /** | |
246 | * __vmw_cmdbuf_header_free - Free a struct vmw_cmdbuf_header and its | |
247 | * associated structures. | |
248 | * | |
249 | * header: Pointer to the header to free. | |
250 | * | |
251 | * For internal use. Must be called with man::lock held. | |
252 | */ | |
253 | static void __vmw_cmdbuf_header_free(struct vmw_cmdbuf_header *header) | |
254 | { | |
255 | struct vmw_cmdbuf_man *man = header->man; | |
256 | ||
fb89ac51 | 257 | lockdep_assert_held_once(&man->lock); |
3eab3d9e TH |
258 | |
259 | if (header->inline_space) { | |
260 | vmw_cmdbuf_header_inline_free(header); | |
261 | return; | |
262 | } | |
263 | ||
9b590783 | 264 | drm_mm_remove_node(&header->node); |
3eab3d9e TH |
265 | wake_up_all(&man->alloc_queue); |
266 | if (header->cb_header) | |
267 | dma_pool_free(man->headers, header->cb_header, | |
268 | header->handle); | |
269 | kfree(header); | |
270 | } | |
271 | ||
272 | /** | |
273 | * vmw_cmdbuf_header_free - Free a struct vmw_cmdbuf_header and its | |
274 | * associated structures. | |
275 | * | |
276 | * @header: Pointer to the header to free. | |
277 | */ | |
278 | void vmw_cmdbuf_header_free(struct vmw_cmdbuf_header *header) | |
279 | { | |
280 | struct vmw_cmdbuf_man *man = header->man; | |
281 | ||
282 | /* Avoid locking if inline_space */ | |
283 | if (header->inline_space) { | |
284 | vmw_cmdbuf_header_inline_free(header); | |
285 | return; | |
286 | } | |
ef369904 | 287 | spin_lock(&man->lock); |
3eab3d9e | 288 | __vmw_cmdbuf_header_free(header); |
ef369904 | 289 | spin_unlock(&man->lock); |
3eab3d9e TH |
290 | } |
291 | ||
292 | ||
293 | /** | |
294 | * vmw_cmbuf_header_submit: Submit a command buffer to hardware. | |
295 | * | |
296 | * @header: The header of the buffer to submit. | |
297 | */ | |
298 | static int vmw_cmdbuf_header_submit(struct vmw_cmdbuf_header *header) | |
299 | { | |
300 | struct vmw_cmdbuf_man *man = header->man; | |
301 | u32 val; | |
302 | ||
0e7c875d | 303 | val = upper_32_bits(header->handle); |
3eab3d9e | 304 | vmw_write(man->dev_priv, SVGA_REG_COMMAND_HIGH, val); |
2e3cc8cf | 305 | |
0e7c875d | 306 | val = lower_32_bits(header->handle); |
3eab3d9e TH |
307 | val |= header->cb_context & SVGA_CB_CONTEXT_MASK; |
308 | vmw_write(man->dev_priv, SVGA_REG_COMMAND_LOW, val); | |
309 | ||
310 | return header->cb_header->status; | |
311 | } | |
312 | ||
313 | /** | |
314 | * vmw_cmdbuf_ctx_init: Initialize a command buffer context. | |
315 | * | |
316 | * @ctx: The command buffer context to initialize | |
317 | */ | |
318 | static void vmw_cmdbuf_ctx_init(struct vmw_cmdbuf_context *ctx) | |
319 | { | |
320 | INIT_LIST_HEAD(&ctx->hw_submitted); | |
321 | INIT_LIST_HEAD(&ctx->submitted); | |
322 | INIT_LIST_HEAD(&ctx->preempted); | |
323 | ctx->num_hw_submitted = 0; | |
324 | } | |
325 | ||
326 | /** | |
327 | * vmw_cmdbuf_ctx_submit: Submit command buffers from a command buffer | |
328 | * context. | |
329 | * | |
330 | * @man: The command buffer manager. | |
331 | * @ctx: The command buffer context. | |
332 | * | |
333 | * Submits command buffers to hardware until there are no more command | |
334 | * buffers to submit or the hardware can't handle more command buffers. | |
335 | */ | |
336 | static void vmw_cmdbuf_ctx_submit(struct vmw_cmdbuf_man *man, | |
337 | struct vmw_cmdbuf_context *ctx) | |
338 | { | |
339 | while (ctx->num_hw_submitted < man->max_hw_submitted && | |
65b97a2b TH |
340 | !list_empty(&ctx->submitted) && |
341 | !ctx->block_submission) { | |
3eab3d9e TH |
342 | struct vmw_cmdbuf_header *entry; |
343 | SVGACBStatus status; | |
344 | ||
345 | entry = list_first_entry(&ctx->submitted, | |
346 | struct vmw_cmdbuf_header, | |
347 | list); | |
348 | ||
349 | status = vmw_cmdbuf_header_submit(entry); | |
350 | ||
351 | /* This should never happen */ | |
352 | if (WARN_ON_ONCE(status == SVGA_CB_STATUS_QUEUE_FULL)) { | |
353 | entry->cb_header->status = SVGA_CB_STATUS_NONE; | |
354 | break; | |
355 | } | |
356 | ||
357 | list_del(&entry->list); | |
358 | list_add_tail(&entry->list, &ctx->hw_submitted); | |
359 | ctx->num_hw_submitted++; | |
360 | } | |
361 | ||
362 | } | |
363 | ||
364 | /** | |
365 | * vmw_cmdbuf_ctx_submit: Process a command buffer context. | |
366 | * | |
367 | * @man: The command buffer manager. | |
368 | * @ctx: The command buffer context. | |
369 | * | |
370 | * Submit command buffers to hardware if possible, and process finished | |
371 | * buffers. Typically freeing them, but on preemption or error take | |
372 | * appropriate action. Wake up waiters if appropriate. | |
373 | */ | |
374 | static void vmw_cmdbuf_ctx_process(struct vmw_cmdbuf_man *man, | |
375 | struct vmw_cmdbuf_context *ctx, | |
376 | int *notempty) | |
377 | { | |
378 | struct vmw_cmdbuf_header *entry, *next; | |
379 | ||
380 | vmw_cmdbuf_ctx_submit(man, ctx); | |
381 | ||
382 | list_for_each_entry_safe(entry, next, &ctx->hw_submitted, list) { | |
383 | SVGACBStatus status = entry->cb_header->status; | |
384 | ||
385 | if (status == SVGA_CB_STATUS_NONE) | |
386 | break; | |
387 | ||
388 | list_del(&entry->list); | |
389 | wake_up_all(&man->idle_queue); | |
390 | ctx->num_hw_submitted--; | |
391 | switch (status) { | |
392 | case SVGA_CB_STATUS_COMPLETED: | |
393 | __vmw_cmdbuf_header_free(entry); | |
394 | break; | |
395 | case SVGA_CB_STATUS_COMMAND_ERROR: | |
4062dd3e | 396 | WARN_ONCE(true, "Command buffer error.\n"); |
65b97a2b | 397 | entry->cb_header->status = SVGA_CB_STATUS_NONE; |
3eab3d9e TH |
398 | list_add_tail(&entry->list, &man->error); |
399 | schedule_work(&man->work); | |
400 | break; | |
401 | case SVGA_CB_STATUS_PREEMPTED: | |
65b97a2b TH |
402 | entry->cb_header->status = SVGA_CB_STATUS_NONE; |
403 | list_add_tail(&entry->list, &ctx->preempted); | |
404 | break; | |
405 | case SVGA_CB_STATUS_CB_HEADER_ERROR: | |
406 | WARN_ONCE(true, "Command buffer header error.\n"); | |
407 | __vmw_cmdbuf_header_free(entry); | |
3eab3d9e TH |
408 | break; |
409 | default: | |
410 | WARN_ONCE(true, "Undefined command buffer status.\n"); | |
411 | __vmw_cmdbuf_header_free(entry); | |
412 | break; | |
413 | } | |
414 | } | |
415 | ||
416 | vmw_cmdbuf_ctx_submit(man, ctx); | |
417 | if (!list_empty(&ctx->submitted)) | |
418 | (*notempty)++; | |
419 | } | |
420 | ||
421 | /** | |
422 | * vmw_cmdbuf_man_process - Process all command buffer contexts and | |
423 | * switch on and off irqs as appropriate. | |
424 | * | |
425 | * @man: The command buffer manager. | |
426 | * | |
427 | * Calls vmw_cmdbuf_ctx_process() on all contexts. If any context has | |
428 | * command buffers left that are not submitted to hardware, Make sure | |
09dc1387 | 429 | * IRQ handling is turned on. Otherwise, make sure it's turned off. |
3eab3d9e | 430 | */ |
09dc1387 | 431 | static void vmw_cmdbuf_man_process(struct vmw_cmdbuf_man *man) |
3eab3d9e | 432 | { |
09dc1387 | 433 | int notempty; |
3eab3d9e TH |
434 | struct vmw_cmdbuf_context *ctx; |
435 | int i; | |
436 | ||
09dc1387 TH |
437 | retry: |
438 | notempty = 0; | |
3eab3d9e TH |
439 | for_each_cmdbuf_ctx(man, i, ctx) |
440 | vmw_cmdbuf_ctx_process(man, ctx, ¬empty); | |
441 | ||
442 | if (man->irq_on && !notempty) { | |
443 | vmw_generic_waiter_remove(man->dev_priv, | |
444 | SVGA_IRQFLAG_COMMAND_BUFFER, | |
445 | &man->dev_priv->cmdbuf_waiters); | |
446 | man->irq_on = false; | |
447 | } else if (!man->irq_on && notempty) { | |
448 | vmw_generic_waiter_add(man->dev_priv, | |
449 | SVGA_IRQFLAG_COMMAND_BUFFER, | |
450 | &man->dev_priv->cmdbuf_waiters); | |
451 | man->irq_on = true; | |
452 | ||
453 | /* Rerun in case we just missed an irq. */ | |
09dc1387 | 454 | goto retry; |
3eab3d9e | 455 | } |
3eab3d9e TH |
456 | } |
457 | ||
458 | /** | |
459 | * vmw_cmdbuf_ctx_add - Schedule a command buffer for submission on a | |
460 | * command buffer context | |
461 | * | |
462 | * @man: The command buffer manager. | |
463 | * @header: The header of the buffer to submit. | |
464 | * @cb_context: The command buffer context to use. | |
465 | * | |
466 | * This function adds @header to the "submitted" queue of the command | |
467 | * buffer context identified by @cb_context. It then calls the command buffer | |
468 | * manager processing to potentially submit the buffer to hardware. | |
469 | * @man->lock needs to be held when calling this function. | |
470 | */ | |
471 | static void vmw_cmdbuf_ctx_add(struct vmw_cmdbuf_man *man, | |
472 | struct vmw_cmdbuf_header *header, | |
473 | SVGACBContext cb_context) | |
474 | { | |
475 | if (!(header->cb_header->flags & SVGA_CB_FLAG_DX_CONTEXT)) | |
476 | header->cb_header->dxContext = 0; | |
477 | header->cb_context = cb_context; | |
478 | list_add_tail(&header->list, &man->ctx[cb_context].submitted); | |
479 | ||
09dc1387 | 480 | vmw_cmdbuf_man_process(man); |
3eab3d9e TH |
481 | } |
482 | ||
483 | /** | |
ef369904 TH |
484 | * vmw_cmdbuf_irqthread - The main part of the command buffer interrupt |
485 | * handler implemented as a threaded irq task. | |
3eab3d9e | 486 | * |
ef369904 | 487 | * @man: Pointer to the command buffer manager. |
3eab3d9e | 488 | * |
ef369904 | 489 | * The bottom half of the interrupt handler simply calls into the |
3eab3d9e TH |
490 | * command buffer processor to free finished buffers and submit any |
491 | * queued buffers to hardware. | |
492 | */ | |
ef369904 | 493 | void vmw_cmdbuf_irqthread(struct vmw_cmdbuf_man *man) |
3eab3d9e | 494 | { |
3eab3d9e | 495 | spin_lock(&man->lock); |
09dc1387 | 496 | vmw_cmdbuf_man_process(man); |
3eab3d9e TH |
497 | spin_unlock(&man->lock); |
498 | } | |
499 | ||
500 | /** | |
501 | * vmw_cmdbuf_work_func - The deferred work function that handles | |
502 | * command buffer errors. | |
503 | * | |
504 | * @work: The work func closure argument. | |
505 | * | |
506 | * Restarting the command buffer context after an error requires process | |
507 | * context, so it is deferred to this work function. | |
508 | */ | |
509 | static void vmw_cmdbuf_work_func(struct work_struct *work) | |
510 | { | |
511 | struct vmw_cmdbuf_man *man = | |
512 | container_of(work, struct vmw_cmdbuf_man, work); | |
513 | struct vmw_cmdbuf_header *entry, *next; | |
09dc1387 | 514 | uint32_t dummy; |
65b97a2b TH |
515 | bool send_fence = false; |
516 | struct list_head restart_head[SVGA_CB_CONTEXT_MAX]; | |
517 | int i; | |
518 | struct vmw_cmdbuf_context *ctx; | |
dc366364 | 519 | bool global_block = false; |
3eab3d9e | 520 | |
b2130cca | 521 | for_each_cmdbuf_ctx(man, i, ctx) |
65b97a2b | 522 | INIT_LIST_HEAD(&restart_head[i]); |
65b97a2b TH |
523 | |
524 | mutex_lock(&man->error_mutex); | |
ef369904 | 525 | spin_lock(&man->lock); |
3eab3d9e | 526 | list_for_each_entry_safe(entry, next, &man->error, list) { |
65b97a2b TH |
527 | SVGACBHeader *cb_hdr = entry->cb_header; |
528 | SVGA3dCmdHeader *header = (SVGA3dCmdHeader *) | |
529 | (entry->cmd + cb_hdr->errorOffset); | |
530 | u32 error_cmd_size, new_start_offset; | |
531 | const char *cmd_name; | |
532 | ||
533 | list_del_init(&entry->list); | |
dc366364 | 534 | global_block = true; |
65b97a2b TH |
535 | |
536 | if (!vmw_cmd_describe(header, &error_cmd_size, &cmd_name)) { | |
4062dd3e DR |
537 | VMW_DEBUG_USER("Unknown command causing device error.\n"); |
538 | VMW_DEBUG_USER("Command buffer offset is %lu\n", | |
539 | (unsigned long) cb_hdr->errorOffset); | |
65b97a2b TH |
540 | __vmw_cmdbuf_header_free(entry); |
541 | send_fence = true; | |
542 | continue; | |
543 | } | |
3eab3d9e | 544 | |
4062dd3e DR |
545 | VMW_DEBUG_USER("Command \"%s\" causing device error.\n", |
546 | cmd_name); | |
547 | VMW_DEBUG_USER("Command buffer offset is %lu\n", | |
548 | (unsigned long) cb_hdr->errorOffset); | |
549 | VMW_DEBUG_USER("Command size is %lu\n", | |
550 | (unsigned long) error_cmd_size); | |
65b97a2b TH |
551 | |
552 | new_start_offset = cb_hdr->errorOffset + error_cmd_size; | |
553 | ||
554 | if (new_start_offset >= cb_hdr->length) { | |
555 | __vmw_cmdbuf_header_free(entry); | |
556 | send_fence = true; | |
557 | continue; | |
558 | } | |
559 | ||
560 | if (man->using_mob) | |
561 | cb_hdr->ptr.mob.mobOffset += new_start_offset; | |
562 | else | |
563 | cb_hdr->ptr.pa += (u64) new_start_offset; | |
564 | ||
565 | entry->cmd += new_start_offset; | |
566 | cb_hdr->length -= new_start_offset; | |
567 | cb_hdr->errorOffset = 0; | |
1f1a36cc | 568 | cb_hdr->offset = 0; |
dc366364 | 569 | |
65b97a2b | 570 | list_add_tail(&entry->list, &restart_head[entry->cb_context]); |
65b97a2b | 571 | } |
dc366364 TH |
572 | |
573 | for_each_cmdbuf_ctx(man, i, ctx) | |
574 | man->ctx[i].block_submission = true; | |
575 | ||
65b97a2b TH |
576 | spin_unlock(&man->lock); |
577 | ||
dc366364 TH |
578 | /* Preempt all contexts */ |
579 | if (global_block && vmw_cmdbuf_preempt(man, 0)) | |
580 | DRM_ERROR("Failed preempting command buffer contexts\n"); | |
65b97a2b TH |
581 | |
582 | spin_lock(&man->lock); | |
583 | for_each_cmdbuf_ctx(man, i, ctx) { | |
65b97a2b TH |
584 | /* Move preempted command buffers to the preempted queue. */ |
585 | vmw_cmdbuf_ctx_process(man, ctx, &dummy); | |
586 | ||
587 | /* | |
588 | * Add the preempted queue after the command buffer | |
589 | * that caused an error. | |
590 | */ | |
591 | list_splice_init(&ctx->preempted, restart_head[i].prev); | |
592 | ||
593 | /* | |
594 | * Finally add all command buffers first in the submitted | |
595 | * queue, to rerun them. | |
596 | */ | |
65b97a2b TH |
597 | |
598 | ctx->block_submission = false; | |
dc366364 | 599 | list_splice_init(&restart_head[i], &ctx->submitted); |
3eab3d9e | 600 | } |
65b97a2b TH |
601 | |
602 | vmw_cmdbuf_man_process(man); | |
ef369904 | 603 | spin_unlock(&man->lock); |
3eab3d9e | 604 | |
dc366364 TH |
605 | if (global_block && vmw_cmdbuf_startstop(man, 0, true)) |
606 | DRM_ERROR("Failed restarting command buffer contexts\n"); | |
3eab3d9e | 607 | |
09dc1387 | 608 | /* Send a new fence in case one was removed */ |
65b97a2b TH |
609 | if (send_fence) { |
610 | vmw_fifo_send_fence(man->dev_priv, &dummy); | |
611 | wake_up_all(&man->idle_queue); | |
612 | } | |
613 | ||
614 | mutex_unlock(&man->error_mutex); | |
3eab3d9e TH |
615 | } |
616 | ||
617 | /** | |
618 | * vmw_cmdbuf_man idle - Check whether the command buffer manager is idle. | |
619 | * | |
620 | * @man: The command buffer manager. | |
621 | * @check_preempted: Check also the preempted queue for pending command buffers. | |
622 | * | |
623 | */ | |
624 | static bool vmw_cmdbuf_man_idle(struct vmw_cmdbuf_man *man, | |
625 | bool check_preempted) | |
626 | { | |
627 | struct vmw_cmdbuf_context *ctx; | |
628 | bool idle = false; | |
629 | int i; | |
630 | ||
ef369904 | 631 | spin_lock(&man->lock); |
3eab3d9e TH |
632 | vmw_cmdbuf_man_process(man); |
633 | for_each_cmdbuf_ctx(man, i, ctx) { | |
634 | if (!list_empty(&ctx->submitted) || | |
635 | !list_empty(&ctx->hw_submitted) || | |
636 | (check_preempted && !list_empty(&ctx->preempted))) | |
637 | goto out_unlock; | |
638 | } | |
639 | ||
640 | idle = list_empty(&man->error); | |
641 | ||
642 | out_unlock: | |
ef369904 | 643 | spin_unlock(&man->lock); |
3eab3d9e TH |
644 | |
645 | return idle; | |
646 | } | |
647 | ||
648 | /** | |
649 | * __vmw_cmdbuf_cur_flush - Flush the current command buffer for small kernel | |
650 | * command submissions | |
651 | * | |
652 | * @man: The command buffer manager. | |
653 | * | |
654 | * Flushes the current command buffer without allocating a new one. A new one | |
655 | * is automatically allocated when needed. Call with @man->cur_mutex held. | |
656 | */ | |
657 | static void __vmw_cmdbuf_cur_flush(struct vmw_cmdbuf_man *man) | |
658 | { | |
659 | struct vmw_cmdbuf_header *cur = man->cur; | |
660 | ||
d76ce03e | 661 | lockdep_assert_held_once(&man->cur_mutex); |
3eab3d9e TH |
662 | |
663 | if (!cur) | |
664 | return; | |
665 | ||
ef369904 | 666 | spin_lock(&man->lock); |
3eab3d9e TH |
667 | if (man->cur_pos == 0) { |
668 | __vmw_cmdbuf_header_free(cur); | |
669 | goto out_unlock; | |
670 | } | |
671 | ||
672 | man->cur->cb_header->length = man->cur_pos; | |
673 | vmw_cmdbuf_ctx_add(man, man->cur, SVGA_CB_CONTEXT_0); | |
674 | out_unlock: | |
ef369904 | 675 | spin_unlock(&man->lock); |
3eab3d9e TH |
676 | man->cur = NULL; |
677 | man->cur_pos = 0; | |
678 | } | |
679 | ||
680 | /** | |
681 | * vmw_cmdbuf_cur_flush - Flush the current command buffer for small kernel | |
682 | * command submissions | |
683 | * | |
684 | * @man: The command buffer manager. | |
685 | * @interruptible: Whether to sleep interruptible when sleeping. | |
686 | * | |
687 | * Flushes the current command buffer without allocating a new one. A new one | |
688 | * is automatically allocated when needed. | |
689 | */ | |
690 | int vmw_cmdbuf_cur_flush(struct vmw_cmdbuf_man *man, | |
691 | bool interruptible) | |
692 | { | |
693 | int ret = vmw_cmdbuf_cur_lock(man, interruptible); | |
694 | ||
695 | if (ret) | |
696 | return ret; | |
697 | ||
698 | __vmw_cmdbuf_cur_flush(man); | |
699 | vmw_cmdbuf_cur_unlock(man); | |
700 | ||
701 | return 0; | |
702 | } | |
703 | ||
704 | /** | |
705 | * vmw_cmdbuf_idle - Wait for command buffer manager idle. | |
706 | * | |
707 | * @man: The command buffer manager. | |
708 | * @interruptible: Sleep interruptible while waiting. | |
709 | * @timeout: Time out after this many ticks. | |
710 | * | |
711 | * Wait until the command buffer manager has processed all command buffers, | |
712 | * or until a timeout occurs. If a timeout occurs, the function will return | |
713 | * -EBUSY. | |
714 | */ | |
715 | int vmw_cmdbuf_idle(struct vmw_cmdbuf_man *man, bool interruptible, | |
716 | unsigned long timeout) | |
717 | { | |
718 | int ret; | |
719 | ||
720 | ret = vmw_cmdbuf_cur_flush(man, interruptible); | |
721 | vmw_generic_waiter_add(man->dev_priv, | |
722 | SVGA_IRQFLAG_COMMAND_BUFFER, | |
723 | &man->dev_priv->cmdbuf_waiters); | |
724 | ||
725 | if (interruptible) { | |
726 | ret = wait_event_interruptible_timeout | |
727 | (man->idle_queue, vmw_cmdbuf_man_idle(man, true), | |
728 | timeout); | |
729 | } else { | |
730 | ret = wait_event_timeout | |
731 | (man->idle_queue, vmw_cmdbuf_man_idle(man, true), | |
732 | timeout); | |
733 | } | |
734 | vmw_generic_waiter_remove(man->dev_priv, | |
735 | SVGA_IRQFLAG_COMMAND_BUFFER, | |
736 | &man->dev_priv->cmdbuf_waiters); | |
737 | if (ret == 0) { | |
738 | if (!vmw_cmdbuf_man_idle(man, true)) | |
739 | ret = -EBUSY; | |
740 | else | |
741 | ret = 0; | |
742 | } | |
743 | if (ret > 0) | |
744 | ret = 0; | |
745 | ||
746 | return ret; | |
747 | } | |
748 | ||
749 | /** | |
750 | * vmw_cmdbuf_try_alloc - Try to allocate buffer space from the main pool. | |
751 | * | |
752 | * @man: The command buffer manager. | |
753 | * @info: Allocation info. Will hold the size on entry and allocated mm node | |
754 | * on successful return. | |
755 | * | |
756 | * Try to allocate buffer space from the main pool. Returns true if succeeded. | |
757 | * If a fatal error was hit, the error code is returned in @info->ret. | |
758 | */ | |
759 | static bool vmw_cmdbuf_try_alloc(struct vmw_cmdbuf_man *man, | |
760 | struct vmw_cmdbuf_alloc_info *info) | |
761 | { | |
762 | int ret; | |
763 | ||
9b590783 | 764 | if (info->done) |
3eab3d9e | 765 | return true; |
6034d9d4 | 766 | |
9b590783 | 767 | memset(info->node, 0, sizeof(*info->node)); |
ef369904 | 768 | spin_lock(&man->lock); |
4e64e553 | 769 | ret = drm_mm_insert_node(&man->mm, info->node, info->page_size); |
575f9c86 | 770 | if (ret) { |
09dc1387 | 771 | vmw_cmdbuf_man_process(man); |
4e64e553 | 772 | ret = drm_mm_insert_node(&man->mm, info->node, info->page_size); |
575f9c86 TH |
773 | } |
774 | ||
ef369904 | 775 | spin_unlock(&man->lock); |
9b590783 | 776 | info->done = !ret; |
3eab3d9e | 777 | |
9b590783 | 778 | return info->done; |
3eab3d9e TH |
779 | } |
780 | ||
781 | /** | |
782 | * vmw_cmdbuf_alloc_space - Allocate buffer space from the main pool. | |
783 | * | |
784 | * @man: The command buffer manager. | |
9b590783 | 785 | * @node: Pointer to pre-allocated range-manager node. |
3eab3d9e TH |
786 | * @size: The size of the allocation. |
787 | * @interruptible: Whether to sleep interruptible while waiting for space. | |
788 | * | |
789 | * This function allocates buffer space from the main pool, and if there is | |
790 | * no space available ATM, it turns on IRQ handling and sleeps waiting for it to | |
791 | * become available. | |
792 | */ | |
b9eb1a61 TH |
793 | static int vmw_cmdbuf_alloc_space(struct vmw_cmdbuf_man *man, |
794 | struct drm_mm_node *node, | |
795 | size_t size, | |
796 | bool interruptible) | |
3eab3d9e TH |
797 | { |
798 | struct vmw_cmdbuf_alloc_info info; | |
799 | ||
800 | info.page_size = PAGE_ALIGN(size) >> PAGE_SHIFT; | |
9b590783 TH |
801 | info.node = node; |
802 | info.done = false; | |
3eab3d9e TH |
803 | |
804 | /* | |
805 | * To prevent starvation of large requests, only one allocating call | |
806 | * at a time waiting for space. | |
807 | */ | |
808 | if (interruptible) { | |
809 | if (mutex_lock_interruptible(&man->space_mutex)) | |
9b590783 | 810 | return -ERESTARTSYS; |
3eab3d9e TH |
811 | } else { |
812 | mutex_lock(&man->space_mutex); | |
813 | } | |
814 | ||
815 | /* Try to allocate space without waiting. */ | |
9b590783 TH |
816 | if (vmw_cmdbuf_try_alloc(man, &info)) |
817 | goto out_unlock; | |
3eab3d9e TH |
818 | |
819 | vmw_generic_waiter_add(man->dev_priv, | |
820 | SVGA_IRQFLAG_COMMAND_BUFFER, | |
821 | &man->dev_priv->cmdbuf_waiters); | |
822 | ||
823 | if (interruptible) { | |
824 | int ret; | |
825 | ||
826 | ret = wait_event_interruptible | |
827 | (man->alloc_queue, vmw_cmdbuf_try_alloc(man, &info)); | |
828 | if (ret) { | |
829 | vmw_generic_waiter_remove | |
830 | (man->dev_priv, SVGA_IRQFLAG_COMMAND_BUFFER, | |
831 | &man->dev_priv->cmdbuf_waiters); | |
832 | mutex_unlock(&man->space_mutex); | |
9b590783 | 833 | return ret; |
3eab3d9e TH |
834 | } |
835 | } else { | |
836 | wait_event(man->alloc_queue, vmw_cmdbuf_try_alloc(man, &info)); | |
837 | } | |
838 | vmw_generic_waiter_remove(man->dev_priv, | |
839 | SVGA_IRQFLAG_COMMAND_BUFFER, | |
840 | &man->dev_priv->cmdbuf_waiters); | |
9b590783 TH |
841 | |
842 | out_unlock: | |
3eab3d9e | 843 | mutex_unlock(&man->space_mutex); |
3eab3d9e | 844 | |
9b590783 | 845 | return 0; |
3eab3d9e TH |
846 | } |
847 | ||
848 | /** | |
849 | * vmw_cmdbuf_space_pool - Set up a command buffer header with command buffer | |
850 | * space from the main pool. | |
851 | * | |
852 | * @man: The command buffer manager. | |
853 | * @header: Pointer to the header to set up. | |
854 | * @size: The requested size of the buffer space. | |
855 | * @interruptible: Whether to sleep interruptible while waiting for space. | |
856 | */ | |
857 | static int vmw_cmdbuf_space_pool(struct vmw_cmdbuf_man *man, | |
858 | struct vmw_cmdbuf_header *header, | |
859 | size_t size, | |
860 | bool interruptible) | |
861 | { | |
862 | SVGACBHeader *cb_hdr; | |
863 | size_t offset; | |
864 | int ret; | |
865 | ||
866 | if (!man->has_pool) | |
867 | return -ENOMEM; | |
868 | ||
9b590783 | 869 | ret = vmw_cmdbuf_alloc_space(man, &header->node, size, interruptible); |
3eab3d9e | 870 | |
9b590783 TH |
871 | if (ret) |
872 | return ret; | |
3eab3d9e | 873 | |
a02f6da6 SJ |
874 | header->cb_header = dma_pool_zalloc(man->headers, GFP_KERNEL, |
875 | &header->handle); | |
3eab3d9e TH |
876 | if (!header->cb_header) { |
877 | ret = -ENOMEM; | |
878 | goto out_no_cb_header; | |
879 | } | |
880 | ||
9b590783 | 881 | header->size = header->node.size << PAGE_SHIFT; |
3eab3d9e | 882 | cb_hdr = header->cb_header; |
9b590783 | 883 | offset = header->node.start << PAGE_SHIFT; |
3eab3d9e | 884 | header->cmd = man->map + offset; |
3eab3d9e TH |
885 | if (man->using_mob) { |
886 | cb_hdr->flags = SVGA_CB_FLAG_MOB; | |
887 | cb_hdr->ptr.mob.mobid = man->cmd_space->mem.start; | |
888 | cb_hdr->ptr.mob.mobOffset = offset; | |
889 | } else { | |
890 | cb_hdr->ptr.pa = (u64)man->handle + (u64)offset; | |
891 | } | |
892 | ||
893 | return 0; | |
894 | ||
895 | out_no_cb_header: | |
ef369904 | 896 | spin_lock(&man->lock); |
9b590783 | 897 | drm_mm_remove_node(&header->node); |
ef369904 | 898 | spin_unlock(&man->lock); |
3eab3d9e TH |
899 | |
900 | return ret; | |
901 | } | |
902 | ||
903 | /** | |
904 | * vmw_cmdbuf_space_inline - Set up a command buffer header with | |
905 | * inline command buffer space. | |
906 | * | |
907 | * @man: The command buffer manager. | |
908 | * @header: Pointer to the header to set up. | |
909 | * @size: The requested size of the buffer space. | |
910 | */ | |
911 | static int vmw_cmdbuf_space_inline(struct vmw_cmdbuf_man *man, | |
912 | struct vmw_cmdbuf_header *header, | |
913 | int size) | |
914 | { | |
915 | struct vmw_cmdbuf_dheader *dheader; | |
916 | SVGACBHeader *cb_hdr; | |
917 | ||
918 | if (WARN_ON_ONCE(size > VMW_CMDBUF_INLINE_SIZE)) | |
919 | return -ENOMEM; | |
920 | ||
a02f6da6 SJ |
921 | dheader = dma_pool_zalloc(man->dheaders, GFP_KERNEL, |
922 | &header->handle); | |
3eab3d9e TH |
923 | if (!dheader) |
924 | return -ENOMEM; | |
925 | ||
926 | header->inline_space = true; | |
927 | header->size = VMW_CMDBUF_INLINE_SIZE; | |
928 | cb_hdr = &dheader->cb_header; | |
929 | header->cb_header = cb_hdr; | |
930 | header->cmd = dheader->cmd; | |
3eab3d9e TH |
931 | cb_hdr->status = SVGA_CB_STATUS_NONE; |
932 | cb_hdr->flags = SVGA_CB_FLAG_NONE; | |
933 | cb_hdr->ptr.pa = (u64)header->handle + | |
934 | (u64)offsetof(struct vmw_cmdbuf_dheader, cmd); | |
935 | ||
936 | return 0; | |
937 | } | |
938 | ||
939 | /** | |
940 | * vmw_cmdbuf_alloc - Allocate a command buffer header complete with | |
941 | * command buffer space. | |
942 | * | |
943 | * @man: The command buffer manager. | |
944 | * @size: The requested size of the buffer space. | |
945 | * @interruptible: Whether to sleep interruptible while waiting for space. | |
946 | * @p_header: points to a header pointer to populate on successful return. | |
947 | * | |
948 | * Returns a pointer to command buffer space if successful. Otherwise | |
949 | * returns an error pointer. The header pointer returned in @p_header should | |
950 | * be used for upcoming calls to vmw_cmdbuf_reserve() and vmw_cmdbuf_commit(). | |
951 | */ | |
952 | void *vmw_cmdbuf_alloc(struct vmw_cmdbuf_man *man, | |
953 | size_t size, bool interruptible, | |
954 | struct vmw_cmdbuf_header **p_header) | |
955 | { | |
956 | struct vmw_cmdbuf_header *header; | |
957 | int ret = 0; | |
958 | ||
959 | *p_header = NULL; | |
960 | ||
961 | header = kzalloc(sizeof(*header), GFP_KERNEL); | |
962 | if (!header) | |
963 | return ERR_PTR(-ENOMEM); | |
964 | ||
965 | if (size <= VMW_CMDBUF_INLINE_SIZE) | |
966 | ret = vmw_cmdbuf_space_inline(man, header, size); | |
967 | else | |
968 | ret = vmw_cmdbuf_space_pool(man, header, size, interruptible); | |
969 | ||
970 | if (ret) { | |
971 | kfree(header); | |
972 | return ERR_PTR(ret); | |
973 | } | |
974 | ||
975 | header->man = man; | |
976 | INIT_LIST_HEAD(&header->list); | |
977 | header->cb_header->status = SVGA_CB_STATUS_NONE; | |
978 | *p_header = header; | |
979 | ||
980 | return header->cmd; | |
981 | } | |
982 | ||
983 | /** | |
984 | * vmw_cmdbuf_reserve_cur - Reserve space for commands in the current | |
985 | * command buffer. | |
986 | * | |
987 | * @man: The command buffer manager. | |
988 | * @size: The requested size of the commands. | |
989 | * @ctx_id: The context id if any. Otherwise set to SVGA3D_REG_INVALID. | |
990 | * @interruptible: Whether to sleep interruptible while waiting for space. | |
991 | * | |
992 | * Returns a pointer to command buffer space if successful. Otherwise | |
993 | * returns an error pointer. | |
994 | */ | |
995 | static void *vmw_cmdbuf_reserve_cur(struct vmw_cmdbuf_man *man, | |
996 | size_t size, | |
997 | int ctx_id, | |
998 | bool interruptible) | |
999 | { | |
1000 | struct vmw_cmdbuf_header *cur; | |
1001 | void *ret; | |
1002 | ||
1003 | if (vmw_cmdbuf_cur_lock(man, interruptible)) | |
1004 | return ERR_PTR(-ERESTARTSYS); | |
1005 | ||
1006 | cur = man->cur; | |
1007 | if (cur && (size + man->cur_pos > cur->size || | |
d80efd5c TH |
1008 | ((cur->cb_header->flags & SVGA_CB_FLAG_DX_CONTEXT) && |
1009 | ctx_id != cur->cb_header->dxContext))) | |
3eab3d9e TH |
1010 | __vmw_cmdbuf_cur_flush(man); |
1011 | ||
1012 | if (!man->cur) { | |
1013 | ret = vmw_cmdbuf_alloc(man, | |
1014 | max_t(size_t, size, man->default_size), | |
1015 | interruptible, &man->cur); | |
1016 | if (IS_ERR(ret)) { | |
1017 | vmw_cmdbuf_cur_unlock(man); | |
1018 | return ret; | |
1019 | } | |
1020 | ||
1021 | cur = man->cur; | |
1022 | } | |
1023 | ||
1024 | if (ctx_id != SVGA3D_INVALID_ID) { | |
1025 | cur->cb_header->flags |= SVGA_CB_FLAG_DX_CONTEXT; | |
1026 | cur->cb_header->dxContext = ctx_id; | |
1027 | } | |
1028 | ||
1029 | cur->reserved = size; | |
1030 | ||
1031 | return (void *) (man->cur->cmd + man->cur_pos); | |
1032 | } | |
1033 | ||
1034 | /** | |
1035 | * vmw_cmdbuf_commit_cur - Commit commands in the current command buffer. | |
1036 | * | |
1037 | * @man: The command buffer manager. | |
1038 | * @size: The size of the commands actually written. | |
1039 | * @flush: Whether to flush the command buffer immediately. | |
1040 | */ | |
1041 | static void vmw_cmdbuf_commit_cur(struct vmw_cmdbuf_man *man, | |
1042 | size_t size, bool flush) | |
1043 | { | |
1044 | struct vmw_cmdbuf_header *cur = man->cur; | |
1045 | ||
d76ce03e | 1046 | lockdep_assert_held_once(&man->cur_mutex); |
3eab3d9e TH |
1047 | |
1048 | WARN_ON(size > cur->reserved); | |
1049 | man->cur_pos += size; | |
1050 | if (!size) | |
1051 | cur->cb_header->flags &= ~SVGA_CB_FLAG_DX_CONTEXT; | |
1052 | if (flush) | |
1053 | __vmw_cmdbuf_cur_flush(man); | |
1054 | vmw_cmdbuf_cur_unlock(man); | |
1055 | } | |
1056 | ||
1057 | /** | |
1058 | * vmw_cmdbuf_reserve - Reserve space for commands in a command buffer. | |
1059 | * | |
1060 | * @man: The command buffer manager. | |
1061 | * @size: The requested size of the commands. | |
1062 | * @ctx_id: The context id if any. Otherwise set to SVGA3D_REG_INVALID. | |
1063 | * @interruptible: Whether to sleep interruptible while waiting for space. | |
1064 | * @header: Header of the command buffer. NULL if the current command buffer | |
1065 | * should be used. | |
1066 | * | |
1067 | * Returns a pointer to command buffer space if successful. Otherwise | |
1068 | * returns an error pointer. | |
1069 | */ | |
1070 | void *vmw_cmdbuf_reserve(struct vmw_cmdbuf_man *man, size_t size, | |
1071 | int ctx_id, bool interruptible, | |
1072 | struct vmw_cmdbuf_header *header) | |
1073 | { | |
1074 | if (!header) | |
1075 | return vmw_cmdbuf_reserve_cur(man, size, ctx_id, interruptible); | |
1076 | ||
1077 | if (size > header->size) | |
1078 | return ERR_PTR(-EINVAL); | |
1079 | ||
1080 | if (ctx_id != SVGA3D_INVALID_ID) { | |
1081 | header->cb_header->flags |= SVGA_CB_FLAG_DX_CONTEXT; | |
1082 | header->cb_header->dxContext = ctx_id; | |
1083 | } | |
1084 | ||
1085 | header->reserved = size; | |
1086 | return header->cmd; | |
1087 | } | |
1088 | ||
1089 | /** | |
1090 | * vmw_cmdbuf_commit - Commit commands in a command buffer. | |
1091 | * | |
1092 | * @man: The command buffer manager. | |
1093 | * @size: The size of the commands actually written. | |
1094 | * @header: Header of the command buffer. NULL if the current command buffer | |
1095 | * should be used. | |
1096 | * @flush: Whether to flush the command buffer immediately. | |
1097 | */ | |
1098 | void vmw_cmdbuf_commit(struct vmw_cmdbuf_man *man, size_t size, | |
1099 | struct vmw_cmdbuf_header *header, bool flush) | |
1100 | { | |
1101 | if (!header) { | |
1102 | vmw_cmdbuf_commit_cur(man, size, flush); | |
1103 | return; | |
1104 | } | |
1105 | ||
1106 | (void) vmw_cmdbuf_cur_lock(man, false); | |
1107 | __vmw_cmdbuf_cur_flush(man); | |
1108 | WARN_ON(size > header->reserved); | |
1109 | man->cur = header; | |
1110 | man->cur_pos = size; | |
1111 | if (!size) | |
1112 | header->cb_header->flags &= ~SVGA_CB_FLAG_DX_CONTEXT; | |
1113 | if (flush) | |
1114 | __vmw_cmdbuf_cur_flush(man); | |
1115 | vmw_cmdbuf_cur_unlock(man); | |
1116 | } | |
1117 | ||
3eab3d9e TH |
1118 | |
1119 | /** | |
1120 | * vmw_cmdbuf_send_device_command - Send a command through the device context. | |
1121 | * | |
1122 | * @man: The command buffer manager. | |
1123 | * @command: Pointer to the command to send. | |
1124 | * @size: Size of the command. | |
1125 | * | |
1126 | * Synchronously sends a device context command. | |
1127 | */ | |
1128 | static int vmw_cmdbuf_send_device_command(struct vmw_cmdbuf_man *man, | |
1129 | const void *command, | |
1130 | size_t size) | |
1131 | { | |
1132 | struct vmw_cmdbuf_header *header; | |
1133 | int status; | |
1134 | void *cmd = vmw_cmdbuf_alloc(man, size, false, &header); | |
1135 | ||
1136 | if (IS_ERR(cmd)) | |
1137 | return PTR_ERR(cmd); | |
1138 | ||
1139 | memcpy(cmd, command, size); | |
1140 | header->cb_header->length = size; | |
1141 | header->cb_context = SVGA_CB_CONTEXT_DEVICE; | |
ef369904 | 1142 | spin_lock(&man->lock); |
3eab3d9e | 1143 | status = vmw_cmdbuf_header_submit(header); |
ef369904 | 1144 | spin_unlock(&man->lock); |
3eab3d9e TH |
1145 | vmw_cmdbuf_header_free(header); |
1146 | ||
1147 | if (status != SVGA_CB_STATUS_COMPLETED) { | |
1148 | DRM_ERROR("Device context command failed with status %d\n", | |
1149 | status); | |
1150 | return -EINVAL; | |
1151 | } | |
1152 | ||
1153 | return 0; | |
1154 | } | |
1155 | ||
65b97a2b TH |
1156 | /** |
1157 | * vmw_cmdbuf_preempt - Send a preempt command through the device | |
1158 | * context. | |
1159 | * | |
1160 | * @man: The command buffer manager. | |
1161 | * | |
1162 | * Synchronously sends a preempt command. | |
1163 | */ | |
1164 | static int vmw_cmdbuf_preempt(struct vmw_cmdbuf_man *man, u32 context) | |
1165 | { | |
1166 | struct { | |
1167 | uint32 id; | |
1168 | SVGADCCmdPreempt body; | |
1169 | } __packed cmd; | |
1170 | ||
1171 | cmd.id = SVGA_DC_CMD_PREEMPT; | |
1172 | cmd.body.context = SVGA_CB_CONTEXT_0 + context; | |
1173 | cmd.body.ignoreIDZero = 0; | |
1174 | ||
1175 | return vmw_cmdbuf_send_device_command(man, &cmd, sizeof(cmd)); | |
1176 | } | |
1177 | ||
1178 | ||
3eab3d9e TH |
1179 | /** |
1180 | * vmw_cmdbuf_startstop - Send a start / stop command through the device | |
1181 | * context. | |
1182 | * | |
1183 | * @man: The command buffer manager. | |
1184 | * @enable: Whether to enable or disable the context. | |
1185 | * | |
1186 | * Synchronously sends a device start / stop context command. | |
1187 | */ | |
65b97a2b | 1188 | static int vmw_cmdbuf_startstop(struct vmw_cmdbuf_man *man, u32 context, |
3eab3d9e TH |
1189 | bool enable) |
1190 | { | |
1191 | struct { | |
1192 | uint32 id; | |
1193 | SVGADCCmdStartStop body; | |
1194 | } __packed cmd; | |
1195 | ||
1196 | cmd.id = SVGA_DC_CMD_START_STOP_CONTEXT; | |
1197 | cmd.body.enable = (enable) ? 1 : 0; | |
65b97a2b | 1198 | cmd.body.context = SVGA_CB_CONTEXT_0 + context; |
3eab3d9e TH |
1199 | |
1200 | return vmw_cmdbuf_send_device_command(man, &cmd, sizeof(cmd)); | |
1201 | } | |
1202 | ||
1203 | /** | |
1204 | * vmw_cmdbuf_set_pool_size - Set command buffer manager sizes | |
1205 | * | |
1206 | * @man: The command buffer manager. | |
1207 | * @size: The size of the main space pool. | |
1208 | * @default_size: The default size of the command buffer for small kernel | |
1209 | * submissions. | |
1210 | * | |
1211 | * Set the size and allocate the main command buffer space pool, | |
1212 | * as well as the default size of the command buffer for | |
1213 | * small kernel submissions. If successful, this enables large command | |
1214 | * submissions. Note that this function requires that rudimentary command | |
1215 | * submission is already available and that the MOB memory manager is alive. | |
1216 | * Returns 0 on success. Negative error code on failure. | |
1217 | */ | |
1218 | int vmw_cmdbuf_set_pool_size(struct vmw_cmdbuf_man *man, | |
1219 | size_t size, size_t default_size) | |
1220 | { | |
1221 | struct vmw_private *dev_priv = man->dev_priv; | |
1222 | bool dummy; | |
1223 | int ret; | |
1224 | ||
1225 | if (man->has_pool) | |
1226 | return -EINVAL; | |
1227 | ||
1228 | /* First, try to allocate a huge chunk of DMA memory */ | |
1229 | size = PAGE_ALIGN(size); | |
1230 | man->map = dma_alloc_coherent(&dev_priv->dev->pdev->dev, size, | |
1231 | &man->handle, GFP_KERNEL); | |
1232 | if (man->map) { | |
1233 | man->using_mob = false; | |
1234 | } else { | |
1235 | /* | |
1236 | * DMA memory failed. If we can have command buffers in a | |
1237 | * MOB, try to use that instead. Note that this will | |
1238 | * actually call into the already enabled manager, when | |
1239 | * binding the MOB. | |
1240 | */ | |
8ce75f8a | 1241 | if (!(dev_priv->capabilities & SVGA_CAP_DX)) |
3eab3d9e TH |
1242 | return -ENOMEM; |
1243 | ||
1244 | ret = ttm_bo_create(&dev_priv->bdev, size, ttm_bo_type_device, | |
724daa4f | 1245 | &vmw_mob_ne_placement, 0, false, |
3eab3d9e TH |
1246 | &man->cmd_space); |
1247 | if (ret) | |
1248 | return ret; | |
1249 | ||
1250 | man->using_mob = true; | |
1251 | ret = ttm_bo_kmap(man->cmd_space, 0, size >> PAGE_SHIFT, | |
1252 | &man->map_obj); | |
1253 | if (ret) | |
1254 | goto out_no_map; | |
1255 | ||
1256 | man->map = ttm_kmap_obj_virtual(&man->map_obj, &dummy); | |
1257 | } | |
1258 | ||
1259 | man->size = size; | |
1260 | drm_mm_init(&man->mm, 0, size >> PAGE_SHIFT); | |
1261 | ||
1262 | man->has_pool = true; | |
09dc1387 TH |
1263 | |
1264 | /* | |
1265 | * For now, set the default size to VMW_CMDBUF_INLINE_SIZE to | |
1266 | * prevent deadlocks from happening when vmw_cmdbuf_space_pool() | |
1267 | * needs to wait for space and we block on further command | |
1268 | * submissions to be able to free up space. | |
1269 | */ | |
1270 | man->default_size = VMW_CMDBUF_INLINE_SIZE; | |
3eab3d9e TH |
1271 | DRM_INFO("Using command buffers with %s pool.\n", |
1272 | (man->using_mob) ? "MOB" : "DMA"); | |
1273 | ||
1274 | return 0; | |
1275 | ||
1276 | out_no_map: | |
6034d9d4 TZ |
1277 | if (man->using_mob) { |
1278 | ttm_bo_put(man->cmd_space); | |
1279 | man->cmd_space = NULL; | |
1280 | } | |
3eab3d9e TH |
1281 | |
1282 | return ret; | |
1283 | } | |
1284 | ||
1285 | /** | |
1286 | * vmw_cmdbuf_man_create: Create a command buffer manager and enable it for | |
1287 | * inline command buffer submissions only. | |
1288 | * | |
1289 | * @dev_priv: Pointer to device private structure. | |
1290 | * | |
1291 | * Returns a pointer to a cummand buffer manager to success or error pointer | |
1292 | * on failure. The command buffer manager will be enabled for submissions of | |
1293 | * size VMW_CMDBUF_INLINE_SIZE only. | |
1294 | */ | |
1295 | struct vmw_cmdbuf_man *vmw_cmdbuf_man_create(struct vmw_private *dev_priv) | |
1296 | { | |
1297 | struct vmw_cmdbuf_man *man; | |
1298 | struct vmw_cmdbuf_context *ctx; | |
65b97a2b | 1299 | unsigned int i; |
3eab3d9e TH |
1300 | int ret; |
1301 | ||
1302 | if (!(dev_priv->capabilities & SVGA_CAP_COMMAND_BUFFERS)) | |
1303 | return ERR_PTR(-ENOSYS); | |
1304 | ||
1305 | man = kzalloc(sizeof(*man), GFP_KERNEL); | |
1306 | if (!man) | |
1307 | return ERR_PTR(-ENOMEM); | |
1308 | ||
dc366364 TH |
1309 | man->num_contexts = (dev_priv->capabilities & SVGA_CAP_HP_CMD_QUEUE) ? |
1310 | 2 : 1; | |
3eab3d9e TH |
1311 | man->headers = dma_pool_create("vmwgfx cmdbuf", |
1312 | &dev_priv->dev->pdev->dev, | |
1313 | sizeof(SVGACBHeader), | |
1314 | 64, PAGE_SIZE); | |
1315 | if (!man->headers) { | |
1316 | ret = -ENOMEM; | |
1317 | goto out_no_pool; | |
1318 | } | |
1319 | ||
1320 | man->dheaders = dma_pool_create("vmwgfx inline cmdbuf", | |
1321 | &dev_priv->dev->pdev->dev, | |
1322 | sizeof(struct vmw_cmdbuf_dheader), | |
1323 | 64, PAGE_SIZE); | |
1324 | if (!man->dheaders) { | |
1325 | ret = -ENOMEM; | |
1326 | goto out_no_dpool; | |
1327 | } | |
1328 | ||
1329 | for_each_cmdbuf_ctx(man, i, ctx) | |
1330 | vmw_cmdbuf_ctx_init(ctx); | |
1331 | ||
1332 | INIT_LIST_HEAD(&man->error); | |
1333 | spin_lock_init(&man->lock); | |
1334 | mutex_init(&man->cur_mutex); | |
1335 | mutex_init(&man->space_mutex); | |
65b97a2b | 1336 | mutex_init(&man->error_mutex); |
3eab3d9e TH |
1337 | man->default_size = VMW_CMDBUF_INLINE_SIZE; |
1338 | init_waitqueue_head(&man->alloc_queue); | |
1339 | init_waitqueue_head(&man->idle_queue); | |
1340 | man->dev_priv = dev_priv; | |
1341 | man->max_hw_submitted = SVGA_CB_MAX_QUEUED_PER_CONTEXT - 1; | |
1342 | INIT_WORK(&man->work, &vmw_cmdbuf_work_func); | |
1343 | vmw_generic_waiter_add(dev_priv, SVGA_IRQFLAG_ERROR, | |
1344 | &dev_priv->error_waiters); | |
dc366364 TH |
1345 | ret = vmw_cmdbuf_startstop(man, 0, true); |
1346 | if (ret) { | |
1347 | DRM_ERROR("Failed starting command buffer contexts\n"); | |
1348 | vmw_cmdbuf_man_destroy(man); | |
1349 | return ERR_PTR(ret); | |
3eab3d9e TH |
1350 | } |
1351 | ||
1352 | return man; | |
1353 | ||
1354 | out_no_dpool: | |
1355 | dma_pool_destroy(man->headers); | |
1356 | out_no_pool: | |
1357 | kfree(man); | |
1358 | ||
1359 | return ERR_PTR(ret); | |
1360 | } | |
1361 | ||
1362 | /** | |
1363 | * vmw_cmdbuf_remove_pool - Take down the main buffer space pool. | |
1364 | * | |
1365 | * @man: Pointer to a command buffer manager. | |
1366 | * | |
1367 | * This function removes the main buffer space pool, and should be called | |
1368 | * before MOB memory management is removed. When this function has been called, | |
1369 | * only small command buffer submissions of size VMW_CMDBUF_INLINE_SIZE or | |
1370 | * less are allowed, and the default size of the command buffer for small kernel | |
1371 | * submissions is also set to this size. | |
1372 | */ | |
1373 | void vmw_cmdbuf_remove_pool(struct vmw_cmdbuf_man *man) | |
1374 | { | |
1375 | if (!man->has_pool) | |
1376 | return; | |
1377 | ||
1378 | man->has_pool = false; | |
1379 | man->default_size = VMW_CMDBUF_INLINE_SIZE; | |
1380 | (void) vmw_cmdbuf_idle(man, false, 10*HZ); | |
1381 | if (man->using_mob) { | |
1382 | (void) ttm_bo_kunmap(&man->map_obj); | |
6034d9d4 TZ |
1383 | ttm_bo_put(man->cmd_space); |
1384 | man->cmd_space = NULL; | |
3eab3d9e TH |
1385 | } else { |
1386 | dma_free_coherent(&man->dev_priv->dev->pdev->dev, | |
1387 | man->size, man->map, man->handle); | |
1388 | } | |
1389 | } | |
1390 | ||
1391 | /** | |
1392 | * vmw_cmdbuf_man_destroy - Take down a command buffer manager. | |
1393 | * | |
1394 | * @man: Pointer to a command buffer manager. | |
1395 | * | |
1396 | * This function idles and then destroys a command buffer manager. | |
1397 | */ | |
1398 | void vmw_cmdbuf_man_destroy(struct vmw_cmdbuf_man *man) | |
1399 | { | |
1400 | WARN_ON_ONCE(man->has_pool); | |
1401 | (void) vmw_cmdbuf_idle(man, false, 10*HZ); | |
65b97a2b | 1402 | |
dc366364 TH |
1403 | if (vmw_cmdbuf_startstop(man, 0, false)) |
1404 | DRM_ERROR("Failed stopping command buffer contexts.\n"); | |
3eab3d9e TH |
1405 | |
1406 | vmw_generic_waiter_remove(man->dev_priv, SVGA_IRQFLAG_ERROR, | |
1407 | &man->dev_priv->error_waiters); | |
3eab3d9e TH |
1408 | (void) cancel_work_sync(&man->work); |
1409 | dma_pool_destroy(man->dheaders); | |
1410 | dma_pool_destroy(man->headers); | |
1411 | mutex_destroy(&man->cur_mutex); | |
1412 | mutex_destroy(&man->space_mutex); | |
65b97a2b | 1413 | mutex_destroy(&man->error_mutex); |
3eab3d9e TH |
1414 | kfree(man); |
1415 | } |