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1// SPDX-License-Identifier: GPL-2.0 OR MIT
2/**************************************************************************
3 *
4 * Copyright 2009-2015 VMware, Inc., Palo Alto, CA., USA
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 <drm/ttm/ttm_placement.h>
29
30#include "vmwgfx_drv.h"
31#include "vmwgfx_resource_priv.h"
32#include "vmwgfx_binding.h"
33
34struct vmw_shader {
35 struct vmw_resource res;
36 SVGA3dShaderType type;
37 uint32_t size;
38 uint8_t num_input_sig;
39 uint8_t num_output_sig;
40};
41
42struct vmw_user_shader {
43 struct ttm_base_object base;
44 struct vmw_shader shader;
45};
46
47struct vmw_dx_shader {
48 struct vmw_resource res;
49 struct vmw_resource *ctx;
50 struct vmw_resource *cotable;
51 u32 id;
52 bool committed;
53 struct list_head cotable_head;
54};
55
56static uint64_t vmw_user_shader_size;
57static uint64_t vmw_shader_size;
58static size_t vmw_shader_dx_size;
59
60static void vmw_user_shader_free(struct vmw_resource *res);
61static struct vmw_resource *
62vmw_user_shader_base_to_res(struct ttm_base_object *base);
63
64static int vmw_gb_shader_create(struct vmw_resource *res);
65static int vmw_gb_shader_bind(struct vmw_resource *res,
66 struct ttm_validate_buffer *val_buf);
67static int vmw_gb_shader_unbind(struct vmw_resource *res,
68 bool readback,
69 struct ttm_validate_buffer *val_buf);
70static int vmw_gb_shader_destroy(struct vmw_resource *res);
71
72static int vmw_dx_shader_create(struct vmw_resource *res);
73static int vmw_dx_shader_bind(struct vmw_resource *res,
74 struct ttm_validate_buffer *val_buf);
75static int vmw_dx_shader_unbind(struct vmw_resource *res,
76 bool readback,
77 struct ttm_validate_buffer *val_buf);
78static void vmw_dx_shader_commit_notify(struct vmw_resource *res,
79 enum vmw_cmdbuf_res_state state);
80static bool vmw_shader_id_ok(u32 user_key, SVGA3dShaderType shader_type);
81static u32 vmw_shader_key(u32 user_key, SVGA3dShaderType shader_type);
82static uint64_t vmw_user_shader_size;
83
84static const struct vmw_user_resource_conv user_shader_conv = {
85 .object_type = VMW_RES_SHADER,
86 .base_obj_to_res = vmw_user_shader_base_to_res,
87 .res_free = vmw_user_shader_free
88};
89
90const struct vmw_user_resource_conv *user_shader_converter =
91 &user_shader_conv;
92
93
94static const struct vmw_res_func vmw_gb_shader_func = {
95 .res_type = vmw_res_shader,
96 .needs_backup = true,
97 .may_evict = true,
98 .prio = 3,
99 .dirty_prio = 3,
100 .type_name = "guest backed shaders",
101 .backup_placement = &vmw_mob_placement,
102 .create = vmw_gb_shader_create,
103 .destroy = vmw_gb_shader_destroy,
104 .bind = vmw_gb_shader_bind,
105 .unbind = vmw_gb_shader_unbind
106};
107
108static const struct vmw_res_func vmw_dx_shader_func = {
109 .res_type = vmw_res_shader,
110 .needs_backup = true,
111 .may_evict = true,
112 .prio = 3,
113 .dirty_prio = 3,
114 .type_name = "dx shaders",
115 .backup_placement = &vmw_mob_placement,
116 .create = vmw_dx_shader_create,
117 /*
118 * The destroy callback is only called with a committed resource on
119 * context destroy, in which case we destroy the cotable anyway,
120 * so there's no need to destroy DX shaders separately.
121 */
122 .destroy = NULL,
123 .bind = vmw_dx_shader_bind,
124 .unbind = vmw_dx_shader_unbind,
125 .commit_notify = vmw_dx_shader_commit_notify,
126};
127
128/**
129 * Shader management:
130 */
131
132static inline struct vmw_shader *
133vmw_res_to_shader(struct vmw_resource *res)
134{
135 return container_of(res, struct vmw_shader, res);
136}
137
138/**
139 * vmw_res_to_dx_shader - typecast a struct vmw_resource to a
140 * struct vmw_dx_shader
141 *
142 * @res: Pointer to the struct vmw_resource.
143 */
144static inline struct vmw_dx_shader *
145vmw_res_to_dx_shader(struct vmw_resource *res)
146{
147 return container_of(res, struct vmw_dx_shader, res);
148}
149
150static void vmw_hw_shader_destroy(struct vmw_resource *res)
151{
152 if (likely(res->func->destroy))
153 (void) res->func->destroy(res);
154 else
155 res->id = -1;
156}
157
158
159static int vmw_gb_shader_init(struct vmw_private *dev_priv,
160 struct vmw_resource *res,
161 uint32_t size,
162 uint64_t offset,
163 SVGA3dShaderType type,
164 uint8_t num_input_sig,
165 uint8_t num_output_sig,
166 struct vmw_buffer_object *byte_code,
167 void (*res_free) (struct vmw_resource *res))
168{
169 struct vmw_shader *shader = vmw_res_to_shader(res);
170 int ret;
171
172 ret = vmw_resource_init(dev_priv, res, true, res_free,
173 &vmw_gb_shader_func);
174
175 if (unlikely(ret != 0)) {
176 if (res_free)
177 res_free(res);
178 else
179 kfree(res);
180 return ret;
181 }
182
183 res->backup_size = size;
184 if (byte_code) {
185 res->backup = vmw_bo_reference(byte_code);
186 res->backup_offset = offset;
187 }
188 shader->size = size;
189 shader->type = type;
190 shader->num_input_sig = num_input_sig;
191 shader->num_output_sig = num_output_sig;
192
193 res->hw_destroy = vmw_hw_shader_destroy;
194 return 0;
195}
196
197/*
198 * GB shader code:
199 */
200
201static int vmw_gb_shader_create(struct vmw_resource *res)
202{
203 struct vmw_private *dev_priv = res->dev_priv;
204 struct vmw_shader *shader = vmw_res_to_shader(res);
205 int ret;
206 struct {
207 SVGA3dCmdHeader header;
208 SVGA3dCmdDefineGBShader body;
209 } *cmd;
210
211 if (likely(res->id != -1))
212 return 0;
213
214 ret = vmw_resource_alloc_id(res);
215 if (unlikely(ret != 0)) {
216 DRM_ERROR("Failed to allocate a shader id.\n");
217 goto out_no_id;
218 }
219
220 if (unlikely(res->id >= VMWGFX_NUM_GB_SHADER)) {
221 ret = -EBUSY;
222 goto out_no_fifo;
223 }
224
225 cmd = VMW_FIFO_RESERVE(dev_priv, sizeof(*cmd));
226 if (unlikely(cmd == NULL)) {
227 ret = -ENOMEM;
228 goto out_no_fifo;
229 }
230
231 cmd->header.id = SVGA_3D_CMD_DEFINE_GB_SHADER;
232 cmd->header.size = sizeof(cmd->body);
233 cmd->body.shid = res->id;
234 cmd->body.type = shader->type;
235 cmd->body.sizeInBytes = shader->size;
236 vmw_fifo_commit(dev_priv, sizeof(*cmd));
237 vmw_fifo_resource_inc(dev_priv);
238
239 return 0;
240
241out_no_fifo:
242 vmw_resource_release_id(res);
243out_no_id:
244 return ret;
245}
246
247static int vmw_gb_shader_bind(struct vmw_resource *res,
248 struct ttm_validate_buffer *val_buf)
249{
250 struct vmw_private *dev_priv = res->dev_priv;
251 struct {
252 SVGA3dCmdHeader header;
253 SVGA3dCmdBindGBShader body;
254 } *cmd;
255 struct ttm_buffer_object *bo = val_buf->bo;
256
257 BUG_ON(bo->mem.mem_type != VMW_PL_MOB);
258
259 cmd = VMW_FIFO_RESERVE(dev_priv, sizeof(*cmd));
260 if (unlikely(cmd == NULL))
261 return -ENOMEM;
262
263 cmd->header.id = SVGA_3D_CMD_BIND_GB_SHADER;
264 cmd->header.size = sizeof(cmd->body);
265 cmd->body.shid = res->id;
266 cmd->body.mobid = bo->mem.start;
267 cmd->body.offsetInBytes = res->backup_offset;
268 res->backup_dirty = false;
269 vmw_fifo_commit(dev_priv, sizeof(*cmd));
270
271 return 0;
272}
273
274static int vmw_gb_shader_unbind(struct vmw_resource *res,
275 bool readback,
276 struct ttm_validate_buffer *val_buf)
277{
278 struct vmw_private *dev_priv = res->dev_priv;
279 struct {
280 SVGA3dCmdHeader header;
281 SVGA3dCmdBindGBShader body;
282 } *cmd;
283 struct vmw_fence_obj *fence;
284
285 BUG_ON(res->backup->base.mem.mem_type != VMW_PL_MOB);
286
287 cmd = VMW_FIFO_RESERVE(dev_priv, sizeof(*cmd));
288 if (unlikely(cmd == NULL))
289 return -ENOMEM;
290
291 cmd->header.id = SVGA_3D_CMD_BIND_GB_SHADER;
292 cmd->header.size = sizeof(cmd->body);
293 cmd->body.shid = res->id;
294 cmd->body.mobid = SVGA3D_INVALID_ID;
295 cmd->body.offsetInBytes = 0;
296 vmw_fifo_commit(dev_priv, sizeof(*cmd));
297
298 /*
299 * Create a fence object and fence the backup buffer.
300 */
301
302 (void) vmw_execbuf_fence_commands(NULL, dev_priv,
303 &fence, NULL);
304
305 vmw_bo_fence_single(val_buf->bo, fence);
306
307 if (likely(fence != NULL))
308 vmw_fence_obj_unreference(&fence);
309
310 return 0;
311}
312
313static int vmw_gb_shader_destroy(struct vmw_resource *res)
314{
315 struct vmw_private *dev_priv = res->dev_priv;
316 struct {
317 SVGA3dCmdHeader header;
318 SVGA3dCmdDestroyGBShader body;
319 } *cmd;
320
321 if (likely(res->id == -1))
322 return 0;
323
324 mutex_lock(&dev_priv->binding_mutex);
325 vmw_binding_res_list_scrub(&res->binding_head);
326
327 cmd = VMW_FIFO_RESERVE(dev_priv, sizeof(*cmd));
328 if (unlikely(cmd == NULL)) {
329 mutex_unlock(&dev_priv->binding_mutex);
330 return -ENOMEM;
331 }
332
333 cmd->header.id = SVGA_3D_CMD_DESTROY_GB_SHADER;
334 cmd->header.size = sizeof(cmd->body);
335 cmd->body.shid = res->id;
336 vmw_fifo_commit(dev_priv, sizeof(*cmd));
337 mutex_unlock(&dev_priv->binding_mutex);
338 vmw_resource_release_id(res);
339 vmw_fifo_resource_dec(dev_priv);
340
341 return 0;
342}
343
344/*
345 * DX shader code:
346 */
347
348/**
349 * vmw_dx_shader_commit_notify - Notify that a shader operation has been
350 * committed to hardware from a user-supplied command stream.
351 *
352 * @res: Pointer to the shader resource.
353 * @state: Indicating whether a creation or removal has been committed.
354 *
355 */
356static void vmw_dx_shader_commit_notify(struct vmw_resource *res,
357 enum vmw_cmdbuf_res_state state)
358{
359 struct vmw_dx_shader *shader = vmw_res_to_dx_shader(res);
360 struct vmw_private *dev_priv = res->dev_priv;
361
362 if (state == VMW_CMDBUF_RES_ADD) {
363 mutex_lock(&dev_priv->binding_mutex);
364 vmw_cotable_add_resource(shader->cotable,
365 &shader->cotable_head);
366 shader->committed = true;
367 res->id = shader->id;
368 mutex_unlock(&dev_priv->binding_mutex);
369 } else {
370 mutex_lock(&dev_priv->binding_mutex);
371 list_del_init(&shader->cotable_head);
372 shader->committed = false;
373 res->id = -1;
374 mutex_unlock(&dev_priv->binding_mutex);
375 }
376}
377
378/**
379 * vmw_dx_shader_unscrub - Have the device reattach a MOB to a DX shader.
380 *
381 * @res: The shader resource
382 *
383 * This function reverts a scrub operation.
384 */
385static int vmw_dx_shader_unscrub(struct vmw_resource *res)
386{
387 struct vmw_dx_shader *shader = vmw_res_to_dx_shader(res);
388 struct vmw_private *dev_priv = res->dev_priv;
389 struct {
390 SVGA3dCmdHeader header;
391 SVGA3dCmdDXBindShader body;
392 } *cmd;
393
394 if (!list_empty(&shader->cotable_head) || !shader->committed)
395 return 0;
396
397 cmd = VMW_FIFO_RESERVE_DX(dev_priv, sizeof(*cmd), shader->ctx->id);
398 if (unlikely(cmd == NULL))
399 return -ENOMEM;
400
401 cmd->header.id = SVGA_3D_CMD_DX_BIND_SHADER;
402 cmd->header.size = sizeof(cmd->body);
403 cmd->body.cid = shader->ctx->id;
404 cmd->body.shid = shader->id;
405 cmd->body.mobid = res->backup->base.mem.start;
406 cmd->body.offsetInBytes = res->backup_offset;
407 vmw_fifo_commit(dev_priv, sizeof(*cmd));
408
409 vmw_cotable_add_resource(shader->cotable, &shader->cotable_head);
410
411 return 0;
412}
413
414/**
415 * vmw_dx_shader_create - The DX shader create callback
416 *
417 * @res: The DX shader resource
418 *
419 * The create callback is called as part of resource validation and
420 * makes sure that we unscrub the shader if it's previously been scrubbed.
421 */
422static int vmw_dx_shader_create(struct vmw_resource *res)
423{
424 struct vmw_private *dev_priv = res->dev_priv;
425 struct vmw_dx_shader *shader = vmw_res_to_dx_shader(res);
426 int ret = 0;
427
428 WARN_ON_ONCE(!shader->committed);
429
430 if (vmw_resource_mob_attached(res)) {
431 mutex_lock(&dev_priv->binding_mutex);
432 ret = vmw_dx_shader_unscrub(res);
433 mutex_unlock(&dev_priv->binding_mutex);
434 }
435
436 res->id = shader->id;
437 return ret;
438}
439
440/**
441 * vmw_dx_shader_bind - The DX shader bind callback
442 *
443 * @res: The DX shader resource
444 * @val_buf: Pointer to the validate buffer.
445 *
446 */
447static int vmw_dx_shader_bind(struct vmw_resource *res,
448 struct ttm_validate_buffer *val_buf)
449{
450 struct vmw_private *dev_priv = res->dev_priv;
451 struct ttm_buffer_object *bo = val_buf->bo;
452
453 BUG_ON(bo->mem.mem_type != VMW_PL_MOB);
454 mutex_lock(&dev_priv->binding_mutex);
455 vmw_dx_shader_unscrub(res);
456 mutex_unlock(&dev_priv->binding_mutex);
457
458 return 0;
459}
460
461/**
462 * vmw_dx_shader_scrub - Have the device unbind a MOB from a DX shader.
463 *
464 * @res: The shader resource
465 *
466 * This function unbinds a MOB from the DX shader without requiring the
467 * MOB dma_buffer to be reserved. The driver still considers the MOB bound.
468 * However, once the driver eventually decides to unbind the MOB, it doesn't
469 * need to access the context.
470 */
471static int vmw_dx_shader_scrub(struct vmw_resource *res)
472{
473 struct vmw_dx_shader *shader = vmw_res_to_dx_shader(res);
474 struct vmw_private *dev_priv = res->dev_priv;
475 struct {
476 SVGA3dCmdHeader header;
477 SVGA3dCmdDXBindShader body;
478 } *cmd;
479
480 if (list_empty(&shader->cotable_head))
481 return 0;
482
483 WARN_ON_ONCE(!shader->committed);
484 cmd = VMW_FIFO_RESERVE(dev_priv, sizeof(*cmd));
485 if (unlikely(cmd == NULL))
486 return -ENOMEM;
487
488 cmd->header.id = SVGA_3D_CMD_DX_BIND_SHADER;
489 cmd->header.size = sizeof(cmd->body);
490 cmd->body.cid = shader->ctx->id;
491 cmd->body.shid = res->id;
492 cmd->body.mobid = SVGA3D_INVALID_ID;
493 cmd->body.offsetInBytes = 0;
494 vmw_fifo_commit(dev_priv, sizeof(*cmd));
495 res->id = -1;
496 list_del_init(&shader->cotable_head);
497
498 return 0;
499}
500
501/**
502 * vmw_dx_shader_unbind - The dx shader unbind callback.
503 *
504 * @res: The shader resource
505 * @readback: Whether this is a readback unbind. Currently unused.
506 * @val_buf: MOB buffer information.
507 */
508static int vmw_dx_shader_unbind(struct vmw_resource *res,
509 bool readback,
510 struct ttm_validate_buffer *val_buf)
511{
512 struct vmw_private *dev_priv = res->dev_priv;
513 struct vmw_fence_obj *fence;
514 int ret;
515
516 BUG_ON(res->backup->base.mem.mem_type != VMW_PL_MOB);
517
518 mutex_lock(&dev_priv->binding_mutex);
519 ret = vmw_dx_shader_scrub(res);
520 mutex_unlock(&dev_priv->binding_mutex);
521
522 if (ret)
523 return ret;
524
525 (void) vmw_execbuf_fence_commands(NULL, dev_priv,
526 &fence, NULL);
527 vmw_bo_fence_single(val_buf->bo, fence);
528
529 if (likely(fence != NULL))
530 vmw_fence_obj_unreference(&fence);
531
532 return 0;
533}
534
535/**
536 * vmw_dx_shader_cotable_list_scrub - The cotable unbind_func callback for
537 * DX shaders.
538 *
539 * @dev_priv: Pointer to device private structure.
540 * @list: The list of cotable resources.
541 * @readback: Whether the call was part of a readback unbind.
542 *
543 * Scrubs all shader MOBs so that any subsequent shader unbind or shader
544 * destroy operation won't need to swap in the context.
545 */
546void vmw_dx_shader_cotable_list_scrub(struct vmw_private *dev_priv,
547 struct list_head *list,
548 bool readback)
549{
550 struct vmw_dx_shader *entry, *next;
551
552 lockdep_assert_held_once(&dev_priv->binding_mutex);
553
554 list_for_each_entry_safe(entry, next, list, cotable_head) {
555 WARN_ON(vmw_dx_shader_scrub(&entry->res));
556 if (!readback)
557 entry->committed = false;
558 }
559}
560
561/**
562 * vmw_dx_shader_res_free - The DX shader free callback
563 *
564 * @res: The shader resource
565 *
566 * Frees the DX shader resource and updates memory accounting.
567 */
568static void vmw_dx_shader_res_free(struct vmw_resource *res)
569{
570 struct vmw_private *dev_priv = res->dev_priv;
571 struct vmw_dx_shader *shader = vmw_res_to_dx_shader(res);
572
573 vmw_resource_unreference(&shader->cotable);
574 kfree(shader);
575 ttm_mem_global_free(vmw_mem_glob(dev_priv), vmw_shader_dx_size);
576}
577
578/**
579 * vmw_dx_shader_add - Add a shader resource as a command buffer managed
580 * resource.
581 *
582 * @man: The command buffer resource manager.
583 * @ctx: Pointer to the context resource.
584 * @user_key: The id used for this shader.
585 * @shader_type: The shader type.
586 * @list: The list of staged command buffer managed resources.
587 */
588int vmw_dx_shader_add(struct vmw_cmdbuf_res_manager *man,
589 struct vmw_resource *ctx,
590 u32 user_key,
591 SVGA3dShaderType shader_type,
592 struct list_head *list)
593{
594 struct vmw_dx_shader *shader;
595 struct vmw_resource *res;
596 struct vmw_private *dev_priv = ctx->dev_priv;
597 struct ttm_operation_ctx ttm_opt_ctx = {
598 .interruptible = true,
599 .no_wait_gpu = false
600 };
601 int ret;
602
603 if (!vmw_shader_dx_size)
604 vmw_shader_dx_size = ttm_round_pot(sizeof(*shader));
605
606 if (!vmw_shader_id_ok(user_key, shader_type))
607 return -EINVAL;
608
609 ret = ttm_mem_global_alloc(vmw_mem_glob(dev_priv), vmw_shader_dx_size,
610 &ttm_opt_ctx);
611 if (ret) {
612 if (ret != -ERESTARTSYS)
613 DRM_ERROR("Out of graphics memory for shader "
614 "creation.\n");
615 return ret;
616 }
617
618 shader = kmalloc(sizeof(*shader), GFP_KERNEL);
619 if (!shader) {
620 ttm_mem_global_free(vmw_mem_glob(dev_priv), vmw_shader_dx_size);
621 return -ENOMEM;
622 }
623
624 res = &shader->res;
625 shader->ctx = ctx;
626 shader->cotable = vmw_resource_reference
627 (vmw_context_cotable(ctx, SVGA_COTABLE_DXSHADER));
628 shader->id = user_key;
629 shader->committed = false;
630 INIT_LIST_HEAD(&shader->cotable_head);
631 ret = vmw_resource_init(dev_priv, res, true,
632 vmw_dx_shader_res_free, &vmw_dx_shader_func);
633 if (ret)
634 goto out_resource_init;
635
636 /*
637 * The user_key name-space is not per shader type for DX shaders,
638 * so when hashing, use a single zero shader type.
639 */
640 ret = vmw_cmdbuf_res_add(man, vmw_cmdbuf_res_shader,
641 vmw_shader_key(user_key, 0),
642 res, list);
643 if (ret)
644 goto out_resource_init;
645
646 res->id = shader->id;
647 res->hw_destroy = vmw_hw_shader_destroy;
648
649out_resource_init:
650 vmw_resource_unreference(&res);
651
652 return ret;
653}
654
655
656
657/**
658 * User-space shader management:
659 */
660
661static struct vmw_resource *
662vmw_user_shader_base_to_res(struct ttm_base_object *base)
663{
664 return &(container_of(base, struct vmw_user_shader, base)->
665 shader.res);
666}
667
668static void vmw_user_shader_free(struct vmw_resource *res)
669{
670 struct vmw_user_shader *ushader =
671 container_of(res, struct vmw_user_shader, shader.res);
672 struct vmw_private *dev_priv = res->dev_priv;
673
674 ttm_base_object_kfree(ushader, base);
675 ttm_mem_global_free(vmw_mem_glob(dev_priv),
676 vmw_user_shader_size);
677}
678
679static void vmw_shader_free(struct vmw_resource *res)
680{
681 struct vmw_shader *shader = vmw_res_to_shader(res);
682 struct vmw_private *dev_priv = res->dev_priv;
683
684 kfree(shader);
685 ttm_mem_global_free(vmw_mem_glob(dev_priv),
686 vmw_shader_size);
687}
688
689/**
690 * This function is called when user space has no more references on the
691 * base object. It releases the base-object's reference on the resource object.
692 */
693
694static void vmw_user_shader_base_release(struct ttm_base_object **p_base)
695{
696 struct ttm_base_object *base = *p_base;
697 struct vmw_resource *res = vmw_user_shader_base_to_res(base);
698
699 *p_base = NULL;
700 vmw_resource_unreference(&res);
701}
702
703int vmw_shader_destroy_ioctl(struct drm_device *dev, void *data,
704 struct drm_file *file_priv)
705{
706 struct drm_vmw_shader_arg *arg = (struct drm_vmw_shader_arg *)data;
707 struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
708
709 return ttm_ref_object_base_unref(tfile, arg->handle,
710 TTM_REF_USAGE);
711}
712
713static int vmw_user_shader_alloc(struct vmw_private *dev_priv,
714 struct vmw_buffer_object *buffer,
715 size_t shader_size,
716 size_t offset,
717 SVGA3dShaderType shader_type,
718 uint8_t num_input_sig,
719 uint8_t num_output_sig,
720 struct ttm_object_file *tfile,
721 u32 *handle)
722{
723 struct vmw_user_shader *ushader;
724 struct vmw_resource *res, *tmp;
725 struct ttm_operation_ctx ctx = {
726 .interruptible = true,
727 .no_wait_gpu = false
728 };
729 int ret;
730
731 if (unlikely(vmw_user_shader_size == 0))
732 vmw_user_shader_size =
733 ttm_round_pot(sizeof(struct vmw_user_shader)) +
734 VMW_IDA_ACC_SIZE + TTM_OBJ_EXTRA_SIZE;
735
736 ret = ttm_mem_global_alloc(vmw_mem_glob(dev_priv),
737 vmw_user_shader_size,
738 &ctx);
739 if (unlikely(ret != 0)) {
740 if (ret != -ERESTARTSYS)
741 DRM_ERROR("Out of graphics memory for shader "
742 "creation.\n");
743 goto out;
744 }
745
746 ushader = kzalloc(sizeof(*ushader), GFP_KERNEL);
747 if (unlikely(!ushader)) {
748 ttm_mem_global_free(vmw_mem_glob(dev_priv),
749 vmw_user_shader_size);
750 ret = -ENOMEM;
751 goto out;
752 }
753
754 res = &ushader->shader.res;
755 ushader->base.shareable = false;
756 ushader->base.tfile = NULL;
757
758 /*
759 * From here on, the destructor takes over resource freeing.
760 */
761
762 ret = vmw_gb_shader_init(dev_priv, res, shader_size,
763 offset, shader_type, num_input_sig,
764 num_output_sig, buffer,
765 vmw_user_shader_free);
766 if (unlikely(ret != 0))
767 goto out;
768
769 tmp = vmw_resource_reference(res);
770 ret = ttm_base_object_init(tfile, &ushader->base, false,
771 VMW_RES_SHADER,
772 &vmw_user_shader_base_release, NULL);
773
774 if (unlikely(ret != 0)) {
775 vmw_resource_unreference(&tmp);
776 goto out_err;
777 }
778
779 if (handle)
780 *handle = ushader->base.handle;
781out_err:
782 vmw_resource_unreference(&res);
783out:
784 return ret;
785}
786
787
788static struct vmw_resource *vmw_shader_alloc(struct vmw_private *dev_priv,
789 struct vmw_buffer_object *buffer,
790 size_t shader_size,
791 size_t offset,
792 SVGA3dShaderType shader_type)
793{
794 struct vmw_shader *shader;
795 struct vmw_resource *res;
796 struct ttm_operation_ctx ctx = {
797 .interruptible = true,
798 .no_wait_gpu = false
799 };
800 int ret;
801
802 if (unlikely(vmw_shader_size == 0))
803 vmw_shader_size =
804 ttm_round_pot(sizeof(struct vmw_shader)) +
805 VMW_IDA_ACC_SIZE;
806
807 ret = ttm_mem_global_alloc(vmw_mem_glob(dev_priv),
808 vmw_shader_size,
809 &ctx);
810 if (unlikely(ret != 0)) {
811 if (ret != -ERESTARTSYS)
812 DRM_ERROR("Out of graphics memory for shader "
813 "creation.\n");
814 goto out_err;
815 }
816
817 shader = kzalloc(sizeof(*shader), GFP_KERNEL);
818 if (unlikely(!shader)) {
819 ttm_mem_global_free(vmw_mem_glob(dev_priv),
820 vmw_shader_size);
821 ret = -ENOMEM;
822 goto out_err;
823 }
824
825 res = &shader->res;
826
827 /*
828 * From here on, the destructor takes over resource freeing.
829 */
830 ret = vmw_gb_shader_init(dev_priv, res, shader_size,
831 offset, shader_type, 0, 0, buffer,
832 vmw_shader_free);
833
834out_err:
835 return ret ? ERR_PTR(ret) : res;
836}
837
838
839static int vmw_shader_define(struct drm_device *dev, struct drm_file *file_priv,
840 enum drm_vmw_shader_type shader_type_drm,
841 u32 buffer_handle, size_t size, size_t offset,
842 uint8_t num_input_sig, uint8_t num_output_sig,
843 uint32_t *shader_handle)
844{
845 struct vmw_private *dev_priv = vmw_priv(dev);
846 struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
847 struct vmw_buffer_object *buffer = NULL;
848 SVGA3dShaderType shader_type;
849 int ret;
850
851 if (buffer_handle != SVGA3D_INVALID_ID) {
852 ret = vmw_user_bo_lookup(tfile, buffer_handle,
853 &buffer, NULL);
854 if (unlikely(ret != 0)) {
855 VMW_DEBUG_USER("Couldn't find buffer for shader creation.\n");
856 return ret;
857 }
858
859 if ((u64)buffer->base.num_pages * PAGE_SIZE <
860 (u64)size + (u64)offset) {
861 VMW_DEBUG_USER("Illegal buffer- or shader size.\n");
862 ret = -EINVAL;
863 goto out_bad_arg;
864 }
865 }
866
867 switch (shader_type_drm) {
868 case drm_vmw_shader_type_vs:
869 shader_type = SVGA3D_SHADERTYPE_VS;
870 break;
871 case drm_vmw_shader_type_ps:
872 shader_type = SVGA3D_SHADERTYPE_PS;
873 break;
874 default:
875 VMW_DEBUG_USER("Illegal shader type.\n");
876 ret = -EINVAL;
877 goto out_bad_arg;
878 }
879
880 ret = ttm_read_lock(&dev_priv->reservation_sem, true);
881 if (unlikely(ret != 0))
882 goto out_bad_arg;
883
884 ret = vmw_user_shader_alloc(dev_priv, buffer, size, offset,
885 shader_type, num_input_sig,
886 num_output_sig, tfile, shader_handle);
887
888 ttm_read_unlock(&dev_priv->reservation_sem);
889out_bad_arg:
890 vmw_bo_unreference(&buffer);
891 return ret;
892}
893
894/**
895 * vmw_shader_id_ok - Check whether a compat shader user key and
896 * shader type are within valid bounds.
897 *
898 * @user_key: User space id of the shader.
899 * @shader_type: Shader type.
900 *
901 * Returns true if valid false if not.
902 */
903static bool vmw_shader_id_ok(u32 user_key, SVGA3dShaderType shader_type)
904{
905 return user_key <= ((1 << 20) - 1) && (unsigned) shader_type < 16;
906}
907
908/**
909 * vmw_shader_key - Compute a hash key suitable for a compat shader.
910 *
911 * @user_key: User space id of the shader.
912 * @shader_type: Shader type.
913 *
914 * Returns a hash key suitable for a command buffer managed resource
915 * manager hash table.
916 */
917static u32 vmw_shader_key(u32 user_key, SVGA3dShaderType shader_type)
918{
919 return user_key | (shader_type << 20);
920}
921
922/**
923 * vmw_shader_remove - Stage a compat shader for removal.
924 *
925 * @man: Pointer to the compat shader manager identifying the shader namespace.
926 * @user_key: The key that is used to identify the shader. The key is
927 * unique to the shader type.
928 * @shader_type: Shader type.
929 * @list: Caller's list of staged command buffer resource actions.
930 */
931int vmw_shader_remove(struct vmw_cmdbuf_res_manager *man,
932 u32 user_key, SVGA3dShaderType shader_type,
933 struct list_head *list)
934{
935 struct vmw_resource *dummy;
936
937 if (!vmw_shader_id_ok(user_key, shader_type))
938 return -EINVAL;
939
940 return vmw_cmdbuf_res_remove(man, vmw_cmdbuf_res_shader,
941 vmw_shader_key(user_key, shader_type),
942 list, &dummy);
943}
944
945/**
946 * vmw_compat_shader_add - Create a compat shader and stage it for addition
947 * as a command buffer managed resource.
948 *
949 * @man: Pointer to the compat shader manager identifying the shader namespace.
950 * @user_key: The key that is used to identify the shader. The key is
951 * unique to the shader type.
952 * @bytecode: Pointer to the bytecode of the shader.
953 * @shader_type: Shader type.
954 * @tfile: Pointer to a struct ttm_object_file that the guest-backed shader is
955 * to be created with.
956 * @list: Caller's list of staged command buffer resource actions.
957 *
958 */
959int vmw_compat_shader_add(struct vmw_private *dev_priv,
960 struct vmw_cmdbuf_res_manager *man,
961 u32 user_key, const void *bytecode,
962 SVGA3dShaderType shader_type,
963 size_t size,
964 struct list_head *list)
965{
966 struct ttm_operation_ctx ctx = { false, true };
967 struct vmw_buffer_object *buf;
968 struct ttm_bo_kmap_obj map;
969 bool is_iomem;
970 int ret;
971 struct vmw_resource *res;
972
973 if (!vmw_shader_id_ok(user_key, shader_type))
974 return -EINVAL;
975
976 /* Allocate and pin a DMA buffer */
977 buf = kzalloc(sizeof(*buf), GFP_KERNEL);
978 if (unlikely(!buf))
979 return -ENOMEM;
980
981 ret = vmw_bo_init(dev_priv, buf, size, &vmw_sys_ne_placement,
982 true, vmw_bo_bo_free);
983 if (unlikely(ret != 0))
984 goto out;
985
986 ret = ttm_bo_reserve(&buf->base, false, true, NULL);
987 if (unlikely(ret != 0))
988 goto no_reserve;
989
990 /* Map and copy shader bytecode. */
991 ret = ttm_bo_kmap(&buf->base, 0, PAGE_ALIGN(size) >> PAGE_SHIFT,
992 &map);
993 if (unlikely(ret != 0)) {
994 ttm_bo_unreserve(&buf->base);
995 goto no_reserve;
996 }
997
998 memcpy(ttm_kmap_obj_virtual(&map, &is_iomem), bytecode, size);
999 WARN_ON(is_iomem);
1000
1001 ttm_bo_kunmap(&map);
1002 ret = ttm_bo_validate(&buf->base, &vmw_sys_placement, &ctx);
1003 WARN_ON(ret != 0);
1004 ttm_bo_unreserve(&buf->base);
1005
1006 res = vmw_shader_alloc(dev_priv, buf, size, 0, shader_type);
1007 if (unlikely(ret != 0))
1008 goto no_reserve;
1009
1010 ret = vmw_cmdbuf_res_add(man, vmw_cmdbuf_res_shader,
1011 vmw_shader_key(user_key, shader_type),
1012 res, list);
1013 vmw_resource_unreference(&res);
1014no_reserve:
1015 vmw_bo_unreference(&buf);
1016out:
1017 return ret;
1018}
1019
1020/**
1021 * vmw_shader_lookup - Look up a compat shader
1022 *
1023 * @man: Pointer to the command buffer managed resource manager identifying
1024 * the shader namespace.
1025 * @user_key: The user space id of the shader.
1026 * @shader_type: The shader type.
1027 *
1028 * Returns a refcounted pointer to a struct vmw_resource if the shader was
1029 * found. An error pointer otherwise.
1030 */
1031struct vmw_resource *
1032vmw_shader_lookup(struct vmw_cmdbuf_res_manager *man,
1033 u32 user_key,
1034 SVGA3dShaderType shader_type)
1035{
1036 if (!vmw_shader_id_ok(user_key, shader_type))
1037 return ERR_PTR(-EINVAL);
1038
1039 return vmw_cmdbuf_res_lookup(man, vmw_cmdbuf_res_shader,
1040 vmw_shader_key(user_key, shader_type));
1041}
1042
1043int vmw_shader_define_ioctl(struct drm_device *dev, void *data,
1044 struct drm_file *file_priv)
1045{
1046 struct drm_vmw_shader_create_arg *arg =
1047 (struct drm_vmw_shader_create_arg *)data;
1048
1049 return vmw_shader_define(dev, file_priv, arg->shader_type,
1050 arg->buffer_handle,
1051 arg->size, arg->offset,
1052 0, 0,
1053 &arg->shader_handle);
1054}
1// SPDX-License-Identifier: GPL-2.0 OR MIT
2/**************************************************************************
3 *
4 * Copyright 2009-2015 VMware, Inc., Palo Alto, CA., USA
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 <drm/ttm/ttm_placement.h>
29
30#include "vmwgfx_drv.h"
31#include "vmwgfx_resource_priv.h"
32#include "vmwgfx_binding.h"
33
34struct vmw_shader {
35 struct vmw_resource res;
36 SVGA3dShaderType type;
37 uint32_t size;
38 uint8_t num_input_sig;
39 uint8_t num_output_sig;
40};
41
42struct vmw_user_shader {
43 struct ttm_base_object base;
44 struct vmw_shader shader;
45};
46
47struct vmw_dx_shader {
48 struct vmw_resource res;
49 struct vmw_resource *ctx;
50 struct vmw_resource *cotable;
51 u32 id;
52 bool committed;
53 struct list_head cotable_head;
54};
55
56static void vmw_user_shader_free(struct vmw_resource *res);
57static struct vmw_resource *
58vmw_user_shader_base_to_res(struct ttm_base_object *base);
59
60static int vmw_gb_shader_create(struct vmw_resource *res);
61static int vmw_gb_shader_bind(struct vmw_resource *res,
62 struct ttm_validate_buffer *val_buf);
63static int vmw_gb_shader_unbind(struct vmw_resource *res,
64 bool readback,
65 struct ttm_validate_buffer *val_buf);
66static int vmw_gb_shader_destroy(struct vmw_resource *res);
67
68static int vmw_dx_shader_create(struct vmw_resource *res);
69static int vmw_dx_shader_bind(struct vmw_resource *res,
70 struct ttm_validate_buffer *val_buf);
71static int vmw_dx_shader_unbind(struct vmw_resource *res,
72 bool readback,
73 struct ttm_validate_buffer *val_buf);
74static void vmw_dx_shader_commit_notify(struct vmw_resource *res,
75 enum vmw_cmdbuf_res_state state);
76static bool vmw_shader_id_ok(u32 user_key, SVGA3dShaderType shader_type);
77static u32 vmw_shader_key(u32 user_key, SVGA3dShaderType shader_type);
78
79static const struct vmw_user_resource_conv user_shader_conv = {
80 .object_type = VMW_RES_SHADER,
81 .base_obj_to_res = vmw_user_shader_base_to_res,
82 .res_free = vmw_user_shader_free
83};
84
85const struct vmw_user_resource_conv *user_shader_converter =
86 &user_shader_conv;
87
88
89static const struct vmw_res_func vmw_gb_shader_func = {
90 .res_type = vmw_res_shader,
91 .needs_backup = true,
92 .may_evict = true,
93 .prio = 3,
94 .dirty_prio = 3,
95 .type_name = "guest backed shaders",
96 .backup_placement = &vmw_mob_placement,
97 .create = vmw_gb_shader_create,
98 .destroy = vmw_gb_shader_destroy,
99 .bind = vmw_gb_shader_bind,
100 .unbind = vmw_gb_shader_unbind
101};
102
103static const struct vmw_res_func vmw_dx_shader_func = {
104 .res_type = vmw_res_shader,
105 .needs_backup = true,
106 .may_evict = true,
107 .prio = 3,
108 .dirty_prio = 3,
109 .type_name = "dx shaders",
110 .backup_placement = &vmw_mob_placement,
111 .create = vmw_dx_shader_create,
112 /*
113 * The destroy callback is only called with a committed resource on
114 * context destroy, in which case we destroy the cotable anyway,
115 * so there's no need to destroy DX shaders separately.
116 */
117 .destroy = NULL,
118 .bind = vmw_dx_shader_bind,
119 .unbind = vmw_dx_shader_unbind,
120 .commit_notify = vmw_dx_shader_commit_notify,
121};
122
123/*
124 * Shader management:
125 */
126
127static inline struct vmw_shader *
128vmw_res_to_shader(struct vmw_resource *res)
129{
130 return container_of(res, struct vmw_shader, res);
131}
132
133/**
134 * vmw_res_to_dx_shader - typecast a struct vmw_resource to a
135 * struct vmw_dx_shader
136 *
137 * @res: Pointer to the struct vmw_resource.
138 */
139static inline struct vmw_dx_shader *
140vmw_res_to_dx_shader(struct vmw_resource *res)
141{
142 return container_of(res, struct vmw_dx_shader, res);
143}
144
145static void vmw_hw_shader_destroy(struct vmw_resource *res)
146{
147 if (likely(res->func->destroy))
148 (void) res->func->destroy(res);
149 else
150 res->id = -1;
151}
152
153
154static int vmw_gb_shader_init(struct vmw_private *dev_priv,
155 struct vmw_resource *res,
156 uint32_t size,
157 uint64_t offset,
158 SVGA3dShaderType type,
159 uint8_t num_input_sig,
160 uint8_t num_output_sig,
161 struct vmw_buffer_object *byte_code,
162 void (*res_free) (struct vmw_resource *res))
163{
164 struct vmw_shader *shader = vmw_res_to_shader(res);
165 int ret;
166
167 ret = vmw_resource_init(dev_priv, res, true, res_free,
168 &vmw_gb_shader_func);
169
170 if (unlikely(ret != 0)) {
171 if (res_free)
172 res_free(res);
173 else
174 kfree(res);
175 return ret;
176 }
177
178 res->backup_size = size;
179 if (byte_code) {
180 res->backup = vmw_bo_reference(byte_code);
181 res->backup_offset = offset;
182 }
183 shader->size = size;
184 shader->type = type;
185 shader->num_input_sig = num_input_sig;
186 shader->num_output_sig = num_output_sig;
187
188 res->hw_destroy = vmw_hw_shader_destroy;
189 return 0;
190}
191
192/*
193 * GB shader code:
194 */
195
196static int vmw_gb_shader_create(struct vmw_resource *res)
197{
198 struct vmw_private *dev_priv = res->dev_priv;
199 struct vmw_shader *shader = vmw_res_to_shader(res);
200 int ret;
201 struct {
202 SVGA3dCmdHeader header;
203 SVGA3dCmdDefineGBShader body;
204 } *cmd;
205
206 if (likely(res->id != -1))
207 return 0;
208
209 ret = vmw_resource_alloc_id(res);
210 if (unlikely(ret != 0)) {
211 DRM_ERROR("Failed to allocate a shader id.\n");
212 goto out_no_id;
213 }
214
215 if (unlikely(res->id >= VMWGFX_NUM_GB_SHADER)) {
216 ret = -EBUSY;
217 goto out_no_fifo;
218 }
219
220 cmd = VMW_CMD_RESERVE(dev_priv, sizeof(*cmd));
221 if (unlikely(cmd == NULL)) {
222 ret = -ENOMEM;
223 goto out_no_fifo;
224 }
225
226 cmd->header.id = SVGA_3D_CMD_DEFINE_GB_SHADER;
227 cmd->header.size = sizeof(cmd->body);
228 cmd->body.shid = res->id;
229 cmd->body.type = shader->type;
230 cmd->body.sizeInBytes = shader->size;
231 vmw_cmd_commit(dev_priv, sizeof(*cmd));
232 vmw_fifo_resource_inc(dev_priv);
233
234 return 0;
235
236out_no_fifo:
237 vmw_resource_release_id(res);
238out_no_id:
239 return ret;
240}
241
242static int vmw_gb_shader_bind(struct vmw_resource *res,
243 struct ttm_validate_buffer *val_buf)
244{
245 struct vmw_private *dev_priv = res->dev_priv;
246 struct {
247 SVGA3dCmdHeader header;
248 SVGA3dCmdBindGBShader body;
249 } *cmd;
250 struct ttm_buffer_object *bo = val_buf->bo;
251
252 BUG_ON(bo->resource->mem_type != VMW_PL_MOB);
253
254 cmd = VMW_CMD_RESERVE(dev_priv, sizeof(*cmd));
255 if (unlikely(cmd == NULL))
256 return -ENOMEM;
257
258 cmd->header.id = SVGA_3D_CMD_BIND_GB_SHADER;
259 cmd->header.size = sizeof(cmd->body);
260 cmd->body.shid = res->id;
261 cmd->body.mobid = bo->resource->start;
262 cmd->body.offsetInBytes = res->backup_offset;
263 res->backup_dirty = false;
264 vmw_cmd_commit(dev_priv, sizeof(*cmd));
265
266 return 0;
267}
268
269static int vmw_gb_shader_unbind(struct vmw_resource *res,
270 bool readback,
271 struct ttm_validate_buffer *val_buf)
272{
273 struct vmw_private *dev_priv = res->dev_priv;
274 struct {
275 SVGA3dCmdHeader header;
276 SVGA3dCmdBindGBShader body;
277 } *cmd;
278 struct vmw_fence_obj *fence;
279
280 BUG_ON(res->backup->base.resource->mem_type != VMW_PL_MOB);
281
282 cmd = VMW_CMD_RESERVE(dev_priv, sizeof(*cmd));
283 if (unlikely(cmd == NULL))
284 return -ENOMEM;
285
286 cmd->header.id = SVGA_3D_CMD_BIND_GB_SHADER;
287 cmd->header.size = sizeof(cmd->body);
288 cmd->body.shid = res->id;
289 cmd->body.mobid = SVGA3D_INVALID_ID;
290 cmd->body.offsetInBytes = 0;
291 vmw_cmd_commit(dev_priv, sizeof(*cmd));
292
293 /*
294 * Create a fence object and fence the backup buffer.
295 */
296
297 (void) vmw_execbuf_fence_commands(NULL, dev_priv,
298 &fence, NULL);
299
300 vmw_bo_fence_single(val_buf->bo, fence);
301
302 if (likely(fence != NULL))
303 vmw_fence_obj_unreference(&fence);
304
305 return 0;
306}
307
308static int vmw_gb_shader_destroy(struct vmw_resource *res)
309{
310 struct vmw_private *dev_priv = res->dev_priv;
311 struct {
312 SVGA3dCmdHeader header;
313 SVGA3dCmdDestroyGBShader body;
314 } *cmd;
315
316 if (likely(res->id == -1))
317 return 0;
318
319 mutex_lock(&dev_priv->binding_mutex);
320 vmw_binding_res_list_scrub(&res->binding_head);
321
322 cmd = VMW_CMD_RESERVE(dev_priv, sizeof(*cmd));
323 if (unlikely(cmd == NULL)) {
324 mutex_unlock(&dev_priv->binding_mutex);
325 return -ENOMEM;
326 }
327
328 cmd->header.id = SVGA_3D_CMD_DESTROY_GB_SHADER;
329 cmd->header.size = sizeof(cmd->body);
330 cmd->body.shid = res->id;
331 vmw_cmd_commit(dev_priv, sizeof(*cmd));
332 mutex_unlock(&dev_priv->binding_mutex);
333 vmw_resource_release_id(res);
334 vmw_fifo_resource_dec(dev_priv);
335
336 return 0;
337}
338
339/*
340 * DX shader code:
341 */
342
343/**
344 * vmw_dx_shader_commit_notify - Notify that a shader operation has been
345 * committed to hardware from a user-supplied command stream.
346 *
347 * @res: Pointer to the shader resource.
348 * @state: Indicating whether a creation or removal has been committed.
349 *
350 */
351static void vmw_dx_shader_commit_notify(struct vmw_resource *res,
352 enum vmw_cmdbuf_res_state state)
353{
354 struct vmw_dx_shader *shader = vmw_res_to_dx_shader(res);
355 struct vmw_private *dev_priv = res->dev_priv;
356
357 if (state == VMW_CMDBUF_RES_ADD) {
358 mutex_lock(&dev_priv->binding_mutex);
359 vmw_cotable_add_resource(shader->cotable,
360 &shader->cotable_head);
361 shader->committed = true;
362 res->id = shader->id;
363 mutex_unlock(&dev_priv->binding_mutex);
364 } else {
365 mutex_lock(&dev_priv->binding_mutex);
366 list_del_init(&shader->cotable_head);
367 shader->committed = false;
368 res->id = -1;
369 mutex_unlock(&dev_priv->binding_mutex);
370 }
371}
372
373/**
374 * vmw_dx_shader_unscrub - Have the device reattach a MOB to a DX shader.
375 *
376 * @res: The shader resource
377 *
378 * This function reverts a scrub operation.
379 */
380static int vmw_dx_shader_unscrub(struct vmw_resource *res)
381{
382 struct vmw_dx_shader *shader = vmw_res_to_dx_shader(res);
383 struct vmw_private *dev_priv = res->dev_priv;
384 struct {
385 SVGA3dCmdHeader header;
386 SVGA3dCmdDXBindShader body;
387 } *cmd;
388
389 if (!list_empty(&shader->cotable_head) || !shader->committed)
390 return 0;
391
392 cmd = VMW_CMD_CTX_RESERVE(dev_priv, sizeof(*cmd), shader->ctx->id);
393 if (unlikely(cmd == NULL))
394 return -ENOMEM;
395
396 cmd->header.id = SVGA_3D_CMD_DX_BIND_SHADER;
397 cmd->header.size = sizeof(cmd->body);
398 cmd->body.cid = shader->ctx->id;
399 cmd->body.shid = shader->id;
400 cmd->body.mobid = res->backup->base.resource->start;
401 cmd->body.offsetInBytes = res->backup_offset;
402 vmw_cmd_commit(dev_priv, sizeof(*cmd));
403
404 vmw_cotable_add_resource(shader->cotable, &shader->cotable_head);
405
406 return 0;
407}
408
409/**
410 * vmw_dx_shader_create - The DX shader create callback
411 *
412 * @res: The DX shader resource
413 *
414 * The create callback is called as part of resource validation and
415 * makes sure that we unscrub the shader if it's previously been scrubbed.
416 */
417static int vmw_dx_shader_create(struct vmw_resource *res)
418{
419 struct vmw_private *dev_priv = res->dev_priv;
420 struct vmw_dx_shader *shader = vmw_res_to_dx_shader(res);
421 int ret = 0;
422
423 WARN_ON_ONCE(!shader->committed);
424
425 if (vmw_resource_mob_attached(res)) {
426 mutex_lock(&dev_priv->binding_mutex);
427 ret = vmw_dx_shader_unscrub(res);
428 mutex_unlock(&dev_priv->binding_mutex);
429 }
430
431 res->id = shader->id;
432 return ret;
433}
434
435/**
436 * vmw_dx_shader_bind - The DX shader bind callback
437 *
438 * @res: The DX shader resource
439 * @val_buf: Pointer to the validate buffer.
440 *
441 */
442static int vmw_dx_shader_bind(struct vmw_resource *res,
443 struct ttm_validate_buffer *val_buf)
444{
445 struct vmw_private *dev_priv = res->dev_priv;
446 struct ttm_buffer_object *bo = val_buf->bo;
447
448 BUG_ON(bo->resource->mem_type != VMW_PL_MOB);
449 mutex_lock(&dev_priv->binding_mutex);
450 vmw_dx_shader_unscrub(res);
451 mutex_unlock(&dev_priv->binding_mutex);
452
453 return 0;
454}
455
456/**
457 * vmw_dx_shader_scrub - Have the device unbind a MOB from a DX shader.
458 *
459 * @res: The shader resource
460 *
461 * This function unbinds a MOB from the DX shader without requiring the
462 * MOB dma_buffer to be reserved. The driver still considers the MOB bound.
463 * However, once the driver eventually decides to unbind the MOB, it doesn't
464 * need to access the context.
465 */
466static int vmw_dx_shader_scrub(struct vmw_resource *res)
467{
468 struct vmw_dx_shader *shader = vmw_res_to_dx_shader(res);
469 struct vmw_private *dev_priv = res->dev_priv;
470 struct {
471 SVGA3dCmdHeader header;
472 SVGA3dCmdDXBindShader body;
473 } *cmd;
474
475 if (list_empty(&shader->cotable_head))
476 return 0;
477
478 WARN_ON_ONCE(!shader->committed);
479 cmd = VMW_CMD_RESERVE(dev_priv, sizeof(*cmd));
480 if (unlikely(cmd == NULL))
481 return -ENOMEM;
482
483 cmd->header.id = SVGA_3D_CMD_DX_BIND_SHADER;
484 cmd->header.size = sizeof(cmd->body);
485 cmd->body.cid = shader->ctx->id;
486 cmd->body.shid = res->id;
487 cmd->body.mobid = SVGA3D_INVALID_ID;
488 cmd->body.offsetInBytes = 0;
489 vmw_cmd_commit(dev_priv, sizeof(*cmd));
490 res->id = -1;
491 list_del_init(&shader->cotable_head);
492
493 return 0;
494}
495
496/**
497 * vmw_dx_shader_unbind - The dx shader unbind callback.
498 *
499 * @res: The shader resource
500 * @readback: Whether this is a readback unbind. Currently unused.
501 * @val_buf: MOB buffer information.
502 */
503static int vmw_dx_shader_unbind(struct vmw_resource *res,
504 bool readback,
505 struct ttm_validate_buffer *val_buf)
506{
507 struct vmw_private *dev_priv = res->dev_priv;
508 struct vmw_fence_obj *fence;
509 int ret;
510
511 BUG_ON(res->backup->base.resource->mem_type != VMW_PL_MOB);
512
513 mutex_lock(&dev_priv->binding_mutex);
514 ret = vmw_dx_shader_scrub(res);
515 mutex_unlock(&dev_priv->binding_mutex);
516
517 if (ret)
518 return ret;
519
520 (void) vmw_execbuf_fence_commands(NULL, dev_priv,
521 &fence, NULL);
522 vmw_bo_fence_single(val_buf->bo, fence);
523
524 if (likely(fence != NULL))
525 vmw_fence_obj_unreference(&fence);
526
527 return 0;
528}
529
530/**
531 * vmw_dx_shader_cotable_list_scrub - The cotable unbind_func callback for
532 * DX shaders.
533 *
534 * @dev_priv: Pointer to device private structure.
535 * @list: The list of cotable resources.
536 * @readback: Whether the call was part of a readback unbind.
537 *
538 * Scrubs all shader MOBs so that any subsequent shader unbind or shader
539 * destroy operation won't need to swap in the context.
540 */
541void vmw_dx_shader_cotable_list_scrub(struct vmw_private *dev_priv,
542 struct list_head *list,
543 bool readback)
544{
545 struct vmw_dx_shader *entry, *next;
546
547 lockdep_assert_held_once(&dev_priv->binding_mutex);
548
549 list_for_each_entry_safe(entry, next, list, cotable_head) {
550 WARN_ON(vmw_dx_shader_scrub(&entry->res));
551 if (!readback)
552 entry->committed = false;
553 }
554}
555
556/**
557 * vmw_dx_shader_res_free - The DX shader free callback
558 *
559 * @res: The shader resource
560 *
561 * Frees the DX shader resource.
562 */
563static void vmw_dx_shader_res_free(struct vmw_resource *res)
564{
565 struct vmw_dx_shader *shader = vmw_res_to_dx_shader(res);
566
567 vmw_resource_unreference(&shader->cotable);
568 kfree(shader);
569}
570
571/**
572 * vmw_dx_shader_add - Add a shader resource as a command buffer managed
573 * resource.
574 *
575 * @man: The command buffer resource manager.
576 * @ctx: Pointer to the context resource.
577 * @user_key: The id used for this shader.
578 * @shader_type: The shader type.
579 * @list: The list of staged command buffer managed resources.
580 */
581int vmw_dx_shader_add(struct vmw_cmdbuf_res_manager *man,
582 struct vmw_resource *ctx,
583 u32 user_key,
584 SVGA3dShaderType shader_type,
585 struct list_head *list)
586{
587 struct vmw_dx_shader *shader;
588 struct vmw_resource *res;
589 struct vmw_private *dev_priv = ctx->dev_priv;
590 int ret;
591
592 if (!vmw_shader_id_ok(user_key, shader_type))
593 return -EINVAL;
594
595 shader = kmalloc(sizeof(*shader), GFP_KERNEL);
596 if (!shader) {
597 return -ENOMEM;
598 }
599
600 res = &shader->res;
601 shader->ctx = ctx;
602 shader->cotable = vmw_resource_reference
603 (vmw_context_cotable(ctx, SVGA_COTABLE_DXSHADER));
604 shader->id = user_key;
605 shader->committed = false;
606 INIT_LIST_HEAD(&shader->cotable_head);
607 ret = vmw_resource_init(dev_priv, res, true,
608 vmw_dx_shader_res_free, &vmw_dx_shader_func);
609 if (ret)
610 goto out_resource_init;
611
612 /*
613 * The user_key name-space is not per shader type for DX shaders,
614 * so when hashing, use a single zero shader type.
615 */
616 ret = vmw_cmdbuf_res_add(man, vmw_cmdbuf_res_shader,
617 vmw_shader_key(user_key, 0),
618 res, list);
619 if (ret)
620 goto out_resource_init;
621
622 res->id = shader->id;
623 res->hw_destroy = vmw_hw_shader_destroy;
624
625out_resource_init:
626 vmw_resource_unreference(&res);
627
628 return ret;
629}
630
631
632
633/*
634 * User-space shader management:
635 */
636
637static struct vmw_resource *
638vmw_user_shader_base_to_res(struct ttm_base_object *base)
639{
640 return &(container_of(base, struct vmw_user_shader, base)->
641 shader.res);
642}
643
644static void vmw_user_shader_free(struct vmw_resource *res)
645{
646 struct vmw_user_shader *ushader =
647 container_of(res, struct vmw_user_shader, shader.res);
648
649 ttm_base_object_kfree(ushader, base);
650}
651
652static void vmw_shader_free(struct vmw_resource *res)
653{
654 struct vmw_shader *shader = vmw_res_to_shader(res);
655
656 kfree(shader);
657}
658
659/*
660 * This function is called when user space has no more references on the
661 * base object. It releases the base-object's reference on the resource object.
662 */
663
664static void vmw_user_shader_base_release(struct ttm_base_object **p_base)
665{
666 struct ttm_base_object *base = *p_base;
667 struct vmw_resource *res = vmw_user_shader_base_to_res(base);
668
669 *p_base = NULL;
670 vmw_resource_unreference(&res);
671}
672
673int vmw_shader_destroy_ioctl(struct drm_device *dev, void *data,
674 struct drm_file *file_priv)
675{
676 struct drm_vmw_shader_arg *arg = (struct drm_vmw_shader_arg *)data;
677 struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
678
679 return ttm_ref_object_base_unref(tfile, arg->handle);
680}
681
682static int vmw_user_shader_alloc(struct vmw_private *dev_priv,
683 struct vmw_buffer_object *buffer,
684 size_t shader_size,
685 size_t offset,
686 SVGA3dShaderType shader_type,
687 uint8_t num_input_sig,
688 uint8_t num_output_sig,
689 struct ttm_object_file *tfile,
690 u32 *handle)
691{
692 struct vmw_user_shader *ushader;
693 struct vmw_resource *res, *tmp;
694 int ret;
695
696 ushader = kzalloc(sizeof(*ushader), GFP_KERNEL);
697 if (unlikely(!ushader)) {
698 ret = -ENOMEM;
699 goto out;
700 }
701
702 res = &ushader->shader.res;
703 ushader->base.shareable = false;
704 ushader->base.tfile = NULL;
705
706 /*
707 * From here on, the destructor takes over resource freeing.
708 */
709
710 ret = vmw_gb_shader_init(dev_priv, res, shader_size,
711 offset, shader_type, num_input_sig,
712 num_output_sig, buffer,
713 vmw_user_shader_free);
714 if (unlikely(ret != 0))
715 goto out;
716
717 tmp = vmw_resource_reference(res);
718 ret = ttm_base_object_init(tfile, &ushader->base, false,
719 VMW_RES_SHADER,
720 &vmw_user_shader_base_release);
721
722 if (unlikely(ret != 0)) {
723 vmw_resource_unreference(&tmp);
724 goto out_err;
725 }
726
727 if (handle)
728 *handle = ushader->base.handle;
729out_err:
730 vmw_resource_unreference(&res);
731out:
732 return ret;
733}
734
735
736static struct vmw_resource *vmw_shader_alloc(struct vmw_private *dev_priv,
737 struct vmw_buffer_object *buffer,
738 size_t shader_size,
739 size_t offset,
740 SVGA3dShaderType shader_type)
741{
742 struct vmw_shader *shader;
743 struct vmw_resource *res;
744 int ret;
745
746 shader = kzalloc(sizeof(*shader), GFP_KERNEL);
747 if (unlikely(!shader)) {
748 ret = -ENOMEM;
749 goto out_err;
750 }
751
752 res = &shader->res;
753
754 /*
755 * From here on, the destructor takes over resource freeing.
756 */
757 ret = vmw_gb_shader_init(dev_priv, res, shader_size,
758 offset, shader_type, 0, 0, buffer,
759 vmw_shader_free);
760
761out_err:
762 return ret ? ERR_PTR(ret) : res;
763}
764
765
766static int vmw_shader_define(struct drm_device *dev, struct drm_file *file_priv,
767 enum drm_vmw_shader_type shader_type_drm,
768 u32 buffer_handle, size_t size, size_t offset,
769 uint8_t num_input_sig, uint8_t num_output_sig,
770 uint32_t *shader_handle)
771{
772 struct vmw_private *dev_priv = vmw_priv(dev);
773 struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
774 struct vmw_buffer_object *buffer = NULL;
775 SVGA3dShaderType shader_type;
776 int ret;
777
778 if (buffer_handle != SVGA3D_INVALID_ID) {
779 ret = vmw_user_bo_lookup(file_priv, buffer_handle, &buffer);
780 if (unlikely(ret != 0)) {
781 VMW_DEBUG_USER("Couldn't find buffer for shader creation.\n");
782 return ret;
783 }
784
785 if ((u64)buffer->base.base.size < (u64)size + (u64)offset) {
786 VMW_DEBUG_USER("Illegal buffer- or shader size.\n");
787 ret = -EINVAL;
788 goto out_bad_arg;
789 }
790 }
791
792 switch (shader_type_drm) {
793 case drm_vmw_shader_type_vs:
794 shader_type = SVGA3D_SHADERTYPE_VS;
795 break;
796 case drm_vmw_shader_type_ps:
797 shader_type = SVGA3D_SHADERTYPE_PS;
798 break;
799 default:
800 VMW_DEBUG_USER("Illegal shader type.\n");
801 ret = -EINVAL;
802 goto out_bad_arg;
803 }
804
805 ret = vmw_user_shader_alloc(dev_priv, buffer, size, offset,
806 shader_type, num_input_sig,
807 num_output_sig, tfile, shader_handle);
808out_bad_arg:
809 vmw_bo_unreference(&buffer);
810 drm_gem_object_put(&buffer->base.base);
811 return ret;
812}
813
814/**
815 * vmw_shader_id_ok - Check whether a compat shader user key and
816 * shader type are within valid bounds.
817 *
818 * @user_key: User space id of the shader.
819 * @shader_type: Shader type.
820 *
821 * Returns true if valid false if not.
822 */
823static bool vmw_shader_id_ok(u32 user_key, SVGA3dShaderType shader_type)
824{
825 return user_key <= ((1 << 20) - 1) && (unsigned) shader_type < 16;
826}
827
828/**
829 * vmw_shader_key - Compute a hash key suitable for a compat shader.
830 *
831 * @user_key: User space id of the shader.
832 * @shader_type: Shader type.
833 *
834 * Returns a hash key suitable for a command buffer managed resource
835 * manager hash table.
836 */
837static u32 vmw_shader_key(u32 user_key, SVGA3dShaderType shader_type)
838{
839 return user_key | (shader_type << 20);
840}
841
842/**
843 * vmw_shader_remove - Stage a compat shader for removal.
844 *
845 * @man: Pointer to the compat shader manager identifying the shader namespace.
846 * @user_key: The key that is used to identify the shader. The key is
847 * unique to the shader type.
848 * @shader_type: Shader type.
849 * @list: Caller's list of staged command buffer resource actions.
850 */
851int vmw_shader_remove(struct vmw_cmdbuf_res_manager *man,
852 u32 user_key, SVGA3dShaderType shader_type,
853 struct list_head *list)
854{
855 struct vmw_resource *dummy;
856
857 if (!vmw_shader_id_ok(user_key, shader_type))
858 return -EINVAL;
859
860 return vmw_cmdbuf_res_remove(man, vmw_cmdbuf_res_shader,
861 vmw_shader_key(user_key, shader_type),
862 list, &dummy);
863}
864
865/**
866 * vmw_compat_shader_add - Create a compat shader and stage it for addition
867 * as a command buffer managed resource.
868 *
869 * @dev_priv: Pointer to device private structure.
870 * @man: Pointer to the compat shader manager identifying the shader namespace.
871 * @user_key: The key that is used to identify the shader. The key is
872 * unique to the shader type.
873 * @bytecode: Pointer to the bytecode of the shader.
874 * @shader_type: Shader type.
875 * @size: Command size.
876 * @list: Caller's list of staged command buffer resource actions.
877 *
878 */
879int vmw_compat_shader_add(struct vmw_private *dev_priv,
880 struct vmw_cmdbuf_res_manager *man,
881 u32 user_key, const void *bytecode,
882 SVGA3dShaderType shader_type,
883 size_t size,
884 struct list_head *list)
885{
886 struct ttm_operation_ctx ctx = { false, true };
887 struct vmw_buffer_object *buf;
888 struct ttm_bo_kmap_obj map;
889 bool is_iomem;
890 int ret;
891 struct vmw_resource *res;
892
893 if (!vmw_shader_id_ok(user_key, shader_type))
894 return -EINVAL;
895
896 ret = vmw_bo_create(dev_priv, size, &vmw_sys_placement,
897 true, true, vmw_bo_bo_free, &buf);
898 if (unlikely(ret != 0))
899 goto out;
900
901 ret = ttm_bo_reserve(&buf->base, false, true, NULL);
902 if (unlikely(ret != 0))
903 goto no_reserve;
904
905 /* Map and copy shader bytecode. */
906 ret = ttm_bo_kmap(&buf->base, 0, PFN_UP(size), &map);
907 if (unlikely(ret != 0)) {
908 ttm_bo_unreserve(&buf->base);
909 goto no_reserve;
910 }
911
912 memcpy(ttm_kmap_obj_virtual(&map, &is_iomem), bytecode, size);
913 WARN_ON(is_iomem);
914
915 ttm_bo_kunmap(&map);
916 ret = ttm_bo_validate(&buf->base, &vmw_sys_placement, &ctx);
917 WARN_ON(ret != 0);
918 ttm_bo_unreserve(&buf->base);
919
920 res = vmw_shader_alloc(dev_priv, buf, size, 0, shader_type);
921 if (unlikely(ret != 0))
922 goto no_reserve;
923
924 ret = vmw_cmdbuf_res_add(man, vmw_cmdbuf_res_shader,
925 vmw_shader_key(user_key, shader_type),
926 res, list);
927 vmw_resource_unreference(&res);
928no_reserve:
929 vmw_bo_unreference(&buf);
930out:
931 return ret;
932}
933
934/**
935 * vmw_shader_lookup - Look up a compat shader
936 *
937 * @man: Pointer to the command buffer managed resource manager identifying
938 * the shader namespace.
939 * @user_key: The user space id of the shader.
940 * @shader_type: The shader type.
941 *
942 * Returns a refcounted pointer to a struct vmw_resource if the shader was
943 * found. An error pointer otherwise.
944 */
945struct vmw_resource *
946vmw_shader_lookup(struct vmw_cmdbuf_res_manager *man,
947 u32 user_key,
948 SVGA3dShaderType shader_type)
949{
950 if (!vmw_shader_id_ok(user_key, shader_type))
951 return ERR_PTR(-EINVAL);
952
953 return vmw_cmdbuf_res_lookup(man, vmw_cmdbuf_res_shader,
954 vmw_shader_key(user_key, shader_type));
955}
956
957int vmw_shader_define_ioctl(struct drm_device *dev, void *data,
958 struct drm_file *file_priv)
959{
960 struct drm_vmw_shader_create_arg *arg =
961 (struct drm_vmw_shader_create_arg *)data;
962
963 return vmw_shader_define(dev, file_priv, arg->shader_type,
964 arg->buffer_handle,
965 arg->size, arg->offset,
966 0, 0,
967 &arg->shader_handle);
968}