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1/**************************************************************************
2 *
3 * Copyright © 2009-2015 VMware, Inc., Palo Alto, CA., USA
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
16 * of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
21 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
22 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
23 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
24 * USE OR OTHER DEALINGS IN THE SOFTWARE.
25 *
26 **************************************************************************/
27
28#include "vmwgfx_drv.h"
29#include "vmwgfx_resource_priv.h"
30#include "vmwgfx_binding.h"
31#include "ttm/ttm_placement.h"
32
33struct vmw_shader {
34 struct vmw_resource res;
35 SVGA3dShaderType type;
36 uint32_t size;
37 uint8_t num_input_sig;
38 uint8_t num_output_sig;
39};
40
41struct vmw_user_shader {
42 struct ttm_base_object base;
43 struct vmw_shader shader;
44};
45
46struct vmw_dx_shader {
47 struct vmw_resource res;
48 struct vmw_resource *ctx;
49 struct vmw_resource *cotable;
50 u32 id;
51 bool committed;
52 struct list_head cotable_head;
53};
54
55static uint64_t vmw_user_shader_size;
56static uint64_t vmw_shader_size;
57static size_t vmw_shader_dx_size;
58
59static void vmw_user_shader_free(struct vmw_resource *res);
60static struct vmw_resource *
61vmw_user_shader_base_to_res(struct ttm_base_object *base);
62
63static int vmw_gb_shader_create(struct vmw_resource *res);
64static int vmw_gb_shader_bind(struct vmw_resource *res,
65 struct ttm_validate_buffer *val_buf);
66static int vmw_gb_shader_unbind(struct vmw_resource *res,
67 bool readback,
68 struct ttm_validate_buffer *val_buf);
69static int vmw_gb_shader_destroy(struct vmw_resource *res);
70
71static int vmw_dx_shader_create(struct vmw_resource *res);
72static int vmw_dx_shader_bind(struct vmw_resource *res,
73 struct ttm_validate_buffer *val_buf);
74static int vmw_dx_shader_unbind(struct vmw_resource *res,
75 bool readback,
76 struct ttm_validate_buffer *val_buf);
77static void vmw_dx_shader_commit_notify(struct vmw_resource *res,
78 enum vmw_cmdbuf_res_state state);
79static bool vmw_shader_id_ok(u32 user_key, SVGA3dShaderType shader_type);
80static u32 vmw_shader_key(u32 user_key, SVGA3dShaderType shader_type);
81static uint64_t vmw_user_shader_size;
82
83static const struct vmw_user_resource_conv user_shader_conv = {
84 .object_type = VMW_RES_SHADER,
85 .base_obj_to_res = vmw_user_shader_base_to_res,
86 .res_free = vmw_user_shader_free
87};
88
89const struct vmw_user_resource_conv *user_shader_converter =
90 &user_shader_conv;
91
92
93static const struct vmw_res_func vmw_gb_shader_func = {
94 .res_type = vmw_res_shader,
95 .needs_backup = true,
96 .may_evict = true,
97 .type_name = "guest backed shaders",
98 .backup_placement = &vmw_mob_placement,
99 .create = vmw_gb_shader_create,
100 .destroy = vmw_gb_shader_destroy,
101 .bind = vmw_gb_shader_bind,
102 .unbind = vmw_gb_shader_unbind
103};
104
105static const struct vmw_res_func vmw_dx_shader_func = {
106 .res_type = vmw_res_shader,
107 .needs_backup = true,
108 .may_evict = false,
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_dma_buffer *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_dmabuf_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 vmw_resource_activate(res, 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_fifo_reserve(dev_priv, sizeof(*cmd));
221 if (unlikely(cmd == NULL)) {
222 DRM_ERROR("Failed reserving FIFO space for shader "
223 "creation.\n");
224 ret = -ENOMEM;
225 goto out_no_fifo;
226 }
227
228 cmd->header.id = SVGA_3D_CMD_DEFINE_GB_SHADER;
229 cmd->header.size = sizeof(cmd->body);
230 cmd->body.shid = res->id;
231 cmd->body.type = shader->type;
232 cmd->body.sizeInBytes = shader->size;
233 vmw_fifo_commit(dev_priv, sizeof(*cmd));
234 vmw_fifo_resource_inc(dev_priv);
235
236 return 0;
237
238out_no_fifo:
239 vmw_resource_release_id(res);
240out_no_id:
241 return ret;
242}
243
244static int vmw_gb_shader_bind(struct vmw_resource *res,
245 struct ttm_validate_buffer *val_buf)
246{
247 struct vmw_private *dev_priv = res->dev_priv;
248 struct {
249 SVGA3dCmdHeader header;
250 SVGA3dCmdBindGBShader body;
251 } *cmd;
252 struct ttm_buffer_object *bo = val_buf->bo;
253
254 BUG_ON(bo->mem.mem_type != VMW_PL_MOB);
255
256 cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
257 if (unlikely(cmd == NULL)) {
258 DRM_ERROR("Failed reserving FIFO space for shader "
259 "binding.\n");
260 return -ENOMEM;
261 }
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 DRM_ERROR("Failed reserving FIFO space for shader "
290 "unbinding.\n");
291 return -ENOMEM;
292 }
293
294 cmd->header.id = SVGA_3D_CMD_BIND_GB_SHADER;
295 cmd->header.size = sizeof(cmd->body);
296 cmd->body.shid = res->id;
297 cmd->body.mobid = SVGA3D_INVALID_ID;
298 cmd->body.offsetInBytes = 0;
299 vmw_fifo_commit(dev_priv, sizeof(*cmd));
300
301 /*
302 * Create a fence object and fence the backup buffer.
303 */
304
305 (void) vmw_execbuf_fence_commands(NULL, dev_priv,
306 &fence, NULL);
307
308 vmw_fence_single_bo(val_buf->bo, fence);
309
310 if (likely(fence != NULL))
311 vmw_fence_obj_unreference(&fence);
312
313 return 0;
314}
315
316static int vmw_gb_shader_destroy(struct vmw_resource *res)
317{
318 struct vmw_private *dev_priv = res->dev_priv;
319 struct {
320 SVGA3dCmdHeader header;
321 SVGA3dCmdDestroyGBShader body;
322 } *cmd;
323
324 if (likely(res->id == -1))
325 return 0;
326
327 mutex_lock(&dev_priv->binding_mutex);
328 vmw_binding_res_list_scrub(&res->binding_head);
329
330 cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
331 if (unlikely(cmd == NULL)) {
332 DRM_ERROR("Failed reserving FIFO space for shader "
333 "destruction.\n");
334 mutex_unlock(&dev_priv->binding_mutex);
335 return -ENOMEM;
336 }
337
338 cmd->header.id = SVGA_3D_CMD_DESTROY_GB_SHADER;
339 cmd->header.size = sizeof(cmd->body);
340 cmd->body.shid = res->id;
341 vmw_fifo_commit(dev_priv, sizeof(*cmd));
342 mutex_unlock(&dev_priv->binding_mutex);
343 vmw_resource_release_id(res);
344 vmw_fifo_resource_dec(dev_priv);
345
346 return 0;
347}
348
349/*
350 * DX shader code:
351 */
352
353/**
354 * vmw_dx_shader_commit_notify - Notify that a shader operation has been
355 * committed to hardware from a user-supplied command stream.
356 *
357 * @res: Pointer to the shader resource.
358 * @state: Indicating whether a creation or removal has been committed.
359 *
360 */
361static void vmw_dx_shader_commit_notify(struct vmw_resource *res,
362 enum vmw_cmdbuf_res_state state)
363{
364 struct vmw_dx_shader *shader = vmw_res_to_dx_shader(res);
365 struct vmw_private *dev_priv = res->dev_priv;
366
367 if (state == VMW_CMDBUF_RES_ADD) {
368 mutex_lock(&dev_priv->binding_mutex);
369 vmw_cotable_add_resource(shader->cotable,
370 &shader->cotable_head);
371 shader->committed = true;
372 res->id = shader->id;
373 mutex_unlock(&dev_priv->binding_mutex);
374 } else {
375 mutex_lock(&dev_priv->binding_mutex);
376 list_del_init(&shader->cotable_head);
377 shader->committed = false;
378 res->id = -1;
379 mutex_unlock(&dev_priv->binding_mutex);
380 }
381}
382
383/**
384 * vmw_dx_shader_unscrub - Have the device reattach a MOB to a DX shader.
385 *
386 * @res: The shader resource
387 *
388 * This function reverts a scrub operation.
389 */
390static int vmw_dx_shader_unscrub(struct vmw_resource *res)
391{
392 struct vmw_dx_shader *shader = vmw_res_to_dx_shader(res);
393 struct vmw_private *dev_priv = res->dev_priv;
394 struct {
395 SVGA3dCmdHeader header;
396 SVGA3dCmdDXBindShader body;
397 } *cmd;
398
399 if (!list_empty(&shader->cotable_head) || !shader->committed)
400 return 0;
401
402 cmd = vmw_fifo_reserve_dx(dev_priv, sizeof(*cmd),
403 shader->ctx->id);
404 if (unlikely(cmd == NULL)) {
405 DRM_ERROR("Failed reserving FIFO space for shader "
406 "scrubbing.\n");
407 return -ENOMEM;
408 }
409
410 cmd->header.id = SVGA_3D_CMD_DX_BIND_SHADER;
411 cmd->header.size = sizeof(cmd->body);
412 cmd->body.cid = shader->ctx->id;
413 cmd->body.shid = shader->id;
414 cmd->body.mobid = res->backup->base.mem.start;
415 cmd->body.offsetInBytes = res->backup_offset;
416 vmw_fifo_commit(dev_priv, sizeof(*cmd));
417
418 vmw_cotable_add_resource(shader->cotable, &shader->cotable_head);
419
420 return 0;
421}
422
423/**
424 * vmw_dx_shader_create - The DX shader create callback
425 *
426 * @res: The DX shader resource
427 *
428 * The create callback is called as part of resource validation and
429 * makes sure that we unscrub the shader if it's previously been scrubbed.
430 */
431static int vmw_dx_shader_create(struct vmw_resource *res)
432{
433 struct vmw_private *dev_priv = res->dev_priv;
434 struct vmw_dx_shader *shader = vmw_res_to_dx_shader(res);
435 int ret = 0;
436
437 WARN_ON_ONCE(!shader->committed);
438
439 if (!list_empty(&res->mob_head)) {
440 mutex_lock(&dev_priv->binding_mutex);
441 ret = vmw_dx_shader_unscrub(res);
442 mutex_unlock(&dev_priv->binding_mutex);
443 }
444
445 res->id = shader->id;
446 return ret;
447}
448
449/**
450 * vmw_dx_shader_bind - The DX shader bind callback
451 *
452 * @res: The DX shader resource
453 * @val_buf: Pointer to the validate buffer.
454 *
455 */
456static int vmw_dx_shader_bind(struct vmw_resource *res,
457 struct ttm_validate_buffer *val_buf)
458{
459 struct vmw_private *dev_priv = res->dev_priv;
460 struct ttm_buffer_object *bo = val_buf->bo;
461
462 BUG_ON(bo->mem.mem_type != VMW_PL_MOB);
463 mutex_lock(&dev_priv->binding_mutex);
464 vmw_dx_shader_unscrub(res);
465 mutex_unlock(&dev_priv->binding_mutex);
466
467 return 0;
468}
469
470/**
471 * vmw_dx_shader_scrub - Have the device unbind a MOB from a DX shader.
472 *
473 * @res: The shader resource
474 *
475 * This function unbinds a MOB from the DX shader without requiring the
476 * MOB dma_buffer to be reserved. The driver still considers the MOB bound.
477 * However, once the driver eventually decides to unbind the MOB, it doesn't
478 * need to access the context.
479 */
480static int vmw_dx_shader_scrub(struct vmw_resource *res)
481{
482 struct vmw_dx_shader *shader = vmw_res_to_dx_shader(res);
483 struct vmw_private *dev_priv = res->dev_priv;
484 struct {
485 SVGA3dCmdHeader header;
486 SVGA3dCmdDXBindShader body;
487 } *cmd;
488
489 if (list_empty(&shader->cotable_head))
490 return 0;
491
492 WARN_ON_ONCE(!shader->committed);
493 cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
494 if (unlikely(cmd == NULL)) {
495 DRM_ERROR("Failed reserving FIFO space for shader "
496 "scrubbing.\n");
497 return -ENOMEM;
498 }
499
500 cmd->header.id = SVGA_3D_CMD_DX_BIND_SHADER;
501 cmd->header.size = sizeof(cmd->body);
502 cmd->body.cid = shader->ctx->id;
503 cmd->body.shid = res->id;
504 cmd->body.mobid = SVGA3D_INVALID_ID;
505 cmd->body.offsetInBytes = 0;
506 vmw_fifo_commit(dev_priv, sizeof(*cmd));
507 res->id = -1;
508 list_del_init(&shader->cotable_head);
509
510 return 0;
511}
512
513/**
514 * vmw_dx_shader_unbind - The dx shader unbind callback.
515 *
516 * @res: The shader resource
517 * @readback: Whether this is a readback unbind. Currently unused.
518 * @val_buf: MOB buffer information.
519 */
520static int vmw_dx_shader_unbind(struct vmw_resource *res,
521 bool readback,
522 struct ttm_validate_buffer *val_buf)
523{
524 struct vmw_private *dev_priv = res->dev_priv;
525 struct vmw_fence_obj *fence;
526 int ret;
527
528 BUG_ON(res->backup->base.mem.mem_type != VMW_PL_MOB);
529
530 mutex_lock(&dev_priv->binding_mutex);
531 ret = vmw_dx_shader_scrub(res);
532 mutex_unlock(&dev_priv->binding_mutex);
533
534 if (ret)
535 return ret;
536
537 (void) vmw_execbuf_fence_commands(NULL, dev_priv,
538 &fence, NULL);
539 vmw_fence_single_bo(val_buf->bo, fence);
540
541 if (likely(fence != NULL))
542 vmw_fence_obj_unreference(&fence);
543
544 return 0;
545}
546
547/**
548 * vmw_dx_shader_cotable_list_scrub - The cotable unbind_func callback for
549 * DX shaders.
550 *
551 * @dev_priv: Pointer to device private structure.
552 * @list: The list of cotable resources.
553 * @readback: Whether the call was part of a readback unbind.
554 *
555 * Scrubs all shader MOBs so that any subsequent shader unbind or shader
556 * destroy operation won't need to swap in the context.
557 */
558void vmw_dx_shader_cotable_list_scrub(struct vmw_private *dev_priv,
559 struct list_head *list,
560 bool readback)
561{
562 struct vmw_dx_shader *entry, *next;
563
564 WARN_ON_ONCE(!mutex_is_locked(&dev_priv->binding_mutex));
565
566 list_for_each_entry_safe(entry, next, list, cotable_head) {
567 WARN_ON(vmw_dx_shader_scrub(&entry->res));
568 if (!readback)
569 entry->committed = false;
570 }
571}
572
573/**
574 * vmw_dx_shader_res_free - The DX shader free callback
575 *
576 * @res: The shader resource
577 *
578 * Frees the DX shader resource and updates memory accounting.
579 */
580static void vmw_dx_shader_res_free(struct vmw_resource *res)
581{
582 struct vmw_private *dev_priv = res->dev_priv;
583 struct vmw_dx_shader *shader = vmw_res_to_dx_shader(res);
584
585 vmw_resource_unreference(&shader->cotable);
586 kfree(shader);
587 ttm_mem_global_free(vmw_mem_glob(dev_priv), vmw_shader_dx_size);
588}
589
590/**
591 * vmw_dx_shader_add - Add a shader resource as a command buffer managed
592 * resource.
593 *
594 * @man: The command buffer resource manager.
595 * @ctx: Pointer to the context resource.
596 * @user_key: The id used for this shader.
597 * @shader_type: The shader type.
598 * @list: The list of staged command buffer managed resources.
599 */
600int vmw_dx_shader_add(struct vmw_cmdbuf_res_manager *man,
601 struct vmw_resource *ctx,
602 u32 user_key,
603 SVGA3dShaderType shader_type,
604 struct list_head *list)
605{
606 struct vmw_dx_shader *shader;
607 struct vmw_resource *res;
608 struct vmw_private *dev_priv = ctx->dev_priv;
609 int ret;
610
611 if (!vmw_shader_dx_size)
612 vmw_shader_dx_size = ttm_round_pot(sizeof(*shader));
613
614 if (!vmw_shader_id_ok(user_key, shader_type))
615 return -EINVAL;
616
617 ret = ttm_mem_global_alloc(vmw_mem_glob(dev_priv), vmw_shader_dx_size,
618 false, true);
619 if (ret) {
620 if (ret != -ERESTARTSYS)
621 DRM_ERROR("Out of graphics memory for shader "
622 "creation.\n");
623 return ret;
624 }
625
626 shader = kmalloc(sizeof(*shader), GFP_KERNEL);
627 if (!shader) {
628 ttm_mem_global_free(vmw_mem_glob(dev_priv), vmw_shader_dx_size);
629 return -ENOMEM;
630 }
631
632 res = &shader->res;
633 shader->ctx = ctx;
634 shader->cotable = vmw_context_cotable(ctx, SVGA_COTABLE_DXSHADER);
635 shader->id = user_key;
636 shader->committed = false;
637 INIT_LIST_HEAD(&shader->cotable_head);
638 ret = vmw_resource_init(dev_priv, res, true,
639 vmw_dx_shader_res_free, &vmw_dx_shader_func);
640 if (ret)
641 goto out_resource_init;
642
643 /*
644 * The user_key name-space is not per shader type for DX shaders,
645 * so when hashing, use a single zero shader type.
646 */
647 ret = vmw_cmdbuf_res_add(man, vmw_cmdbuf_res_shader,
648 vmw_shader_key(user_key, 0),
649 res, list);
650 if (ret)
651 goto out_resource_init;
652
653 res->id = shader->id;
654 vmw_resource_activate(res, vmw_hw_shader_destroy);
655
656out_resource_init:
657 vmw_resource_unreference(&res);
658
659 return ret;
660}
661
662
663
664/**
665 * User-space shader management:
666 */
667
668static struct vmw_resource *
669vmw_user_shader_base_to_res(struct ttm_base_object *base)
670{
671 return &(container_of(base, struct vmw_user_shader, base)->
672 shader.res);
673}
674
675static void vmw_user_shader_free(struct vmw_resource *res)
676{
677 struct vmw_user_shader *ushader =
678 container_of(res, struct vmw_user_shader, shader.res);
679 struct vmw_private *dev_priv = res->dev_priv;
680
681 ttm_base_object_kfree(ushader, base);
682 ttm_mem_global_free(vmw_mem_glob(dev_priv),
683 vmw_user_shader_size);
684}
685
686static void vmw_shader_free(struct vmw_resource *res)
687{
688 struct vmw_shader *shader = vmw_res_to_shader(res);
689 struct vmw_private *dev_priv = res->dev_priv;
690
691 kfree(shader);
692 ttm_mem_global_free(vmw_mem_glob(dev_priv),
693 vmw_shader_size);
694}
695
696/**
697 * This function is called when user space has no more references on the
698 * base object. It releases the base-object's reference on the resource object.
699 */
700
701static void vmw_user_shader_base_release(struct ttm_base_object **p_base)
702{
703 struct ttm_base_object *base = *p_base;
704 struct vmw_resource *res = vmw_user_shader_base_to_res(base);
705
706 *p_base = NULL;
707 vmw_resource_unreference(&res);
708}
709
710int vmw_shader_destroy_ioctl(struct drm_device *dev, void *data,
711 struct drm_file *file_priv)
712{
713 struct drm_vmw_shader_arg *arg = (struct drm_vmw_shader_arg *)data;
714 struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
715
716 return ttm_ref_object_base_unref(tfile, arg->handle,
717 TTM_REF_USAGE);
718}
719
720static int vmw_user_shader_alloc(struct vmw_private *dev_priv,
721 struct vmw_dma_buffer *buffer,
722 size_t shader_size,
723 size_t offset,
724 SVGA3dShaderType shader_type,
725 uint8_t num_input_sig,
726 uint8_t num_output_sig,
727 struct ttm_object_file *tfile,
728 u32 *handle)
729{
730 struct vmw_user_shader *ushader;
731 struct vmw_resource *res, *tmp;
732 int ret;
733
734 /*
735 * Approximate idr memory usage with 128 bytes. It will be limited
736 * by maximum number_of shaders anyway.
737 */
738 if (unlikely(vmw_user_shader_size == 0))
739 vmw_user_shader_size =
740 ttm_round_pot(sizeof(struct vmw_user_shader)) + 128;
741
742 ret = ttm_mem_global_alloc(vmw_mem_glob(dev_priv),
743 vmw_user_shader_size,
744 false, true);
745 if (unlikely(ret != 0)) {
746 if (ret != -ERESTARTSYS)
747 DRM_ERROR("Out of graphics memory for shader "
748 "creation.\n");
749 goto out;
750 }
751
752 ushader = kzalloc(sizeof(*ushader), GFP_KERNEL);
753 if (unlikely(ushader == NULL)) {
754 ttm_mem_global_free(vmw_mem_glob(dev_priv),
755 vmw_user_shader_size);
756 ret = -ENOMEM;
757 goto out;
758 }
759
760 res = &ushader->shader.res;
761 ushader->base.shareable = false;
762 ushader->base.tfile = NULL;
763
764 /*
765 * From here on, the destructor takes over resource freeing.
766 */
767
768 ret = vmw_gb_shader_init(dev_priv, res, shader_size,
769 offset, shader_type, num_input_sig,
770 num_output_sig, buffer,
771 vmw_user_shader_free);
772 if (unlikely(ret != 0))
773 goto out;
774
775 tmp = vmw_resource_reference(res);
776 ret = ttm_base_object_init(tfile, &ushader->base, false,
777 VMW_RES_SHADER,
778 &vmw_user_shader_base_release, NULL);
779
780 if (unlikely(ret != 0)) {
781 vmw_resource_unreference(&tmp);
782 goto out_err;
783 }
784
785 if (handle)
786 *handle = ushader->base.hash.key;
787out_err:
788 vmw_resource_unreference(&res);
789out:
790 return ret;
791}
792
793
794static struct vmw_resource *vmw_shader_alloc(struct vmw_private *dev_priv,
795 struct vmw_dma_buffer *buffer,
796 size_t shader_size,
797 size_t offset,
798 SVGA3dShaderType shader_type)
799{
800 struct vmw_shader *shader;
801 struct vmw_resource *res;
802 int ret;
803
804 /*
805 * Approximate idr memory usage with 128 bytes. It will be limited
806 * by maximum number_of shaders anyway.
807 */
808 if (unlikely(vmw_shader_size == 0))
809 vmw_shader_size =
810 ttm_round_pot(sizeof(struct vmw_shader)) + 128;
811
812 ret = ttm_mem_global_alloc(vmw_mem_glob(dev_priv),
813 vmw_shader_size,
814 false, true);
815 if (unlikely(ret != 0)) {
816 if (ret != -ERESTARTSYS)
817 DRM_ERROR("Out of graphics memory for shader "
818 "creation.\n");
819 goto out_err;
820 }
821
822 shader = kzalloc(sizeof(*shader), GFP_KERNEL);
823 if (unlikely(shader == NULL)) {
824 ttm_mem_global_free(vmw_mem_glob(dev_priv),
825 vmw_shader_size);
826 ret = -ENOMEM;
827 goto out_err;
828 }
829
830 res = &shader->res;
831
832 /*
833 * From here on, the destructor takes over resource freeing.
834 */
835 ret = vmw_gb_shader_init(dev_priv, res, shader_size,
836 offset, shader_type, 0, 0, buffer,
837 vmw_shader_free);
838
839out_err:
840 return ret ? ERR_PTR(ret) : res;
841}
842
843
844static int vmw_shader_define(struct drm_device *dev, struct drm_file *file_priv,
845 enum drm_vmw_shader_type shader_type_drm,
846 u32 buffer_handle, size_t size, size_t offset,
847 uint8_t num_input_sig, uint8_t num_output_sig,
848 uint32_t *shader_handle)
849{
850 struct vmw_private *dev_priv = vmw_priv(dev);
851 struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
852 struct vmw_dma_buffer *buffer = NULL;
853 SVGA3dShaderType shader_type;
854 int ret;
855
856 if (buffer_handle != SVGA3D_INVALID_ID) {
857 ret = vmw_user_dmabuf_lookup(tfile, buffer_handle,
858 &buffer, NULL);
859 if (unlikely(ret != 0)) {
860 DRM_ERROR("Could not find buffer for shader "
861 "creation.\n");
862 return ret;
863 }
864
865 if ((u64)buffer->base.num_pages * PAGE_SIZE <
866 (u64)size + (u64)offset) {
867 DRM_ERROR("Illegal buffer- or shader size.\n");
868 ret = -EINVAL;
869 goto out_bad_arg;
870 }
871 }
872
873 switch (shader_type_drm) {
874 case drm_vmw_shader_type_vs:
875 shader_type = SVGA3D_SHADERTYPE_VS;
876 break;
877 case drm_vmw_shader_type_ps:
878 shader_type = SVGA3D_SHADERTYPE_PS;
879 break;
880 default:
881 DRM_ERROR("Illegal shader type.\n");
882 ret = -EINVAL;
883 goto out_bad_arg;
884 }
885
886 ret = ttm_read_lock(&dev_priv->reservation_sem, true);
887 if (unlikely(ret != 0))
888 goto out_bad_arg;
889
890 ret = vmw_user_shader_alloc(dev_priv, buffer, size, offset,
891 shader_type, num_input_sig,
892 num_output_sig, tfile, shader_handle);
893
894 ttm_read_unlock(&dev_priv->reservation_sem);
895out_bad_arg:
896 vmw_dmabuf_unreference(&buffer);
897 return ret;
898}
899
900/**
901 * vmw_shader_id_ok - Check whether a compat shader user key and
902 * shader type are within valid bounds.
903 *
904 * @user_key: User space id of the shader.
905 * @shader_type: Shader type.
906 *
907 * Returns true if valid false if not.
908 */
909static bool vmw_shader_id_ok(u32 user_key, SVGA3dShaderType shader_type)
910{
911 return user_key <= ((1 << 20) - 1) && (unsigned) shader_type < 16;
912}
913
914/**
915 * vmw_shader_key - Compute a hash key suitable for a compat shader.
916 *
917 * @user_key: User space id of the shader.
918 * @shader_type: Shader type.
919 *
920 * Returns a hash key suitable for a command buffer managed resource
921 * manager hash table.
922 */
923static u32 vmw_shader_key(u32 user_key, SVGA3dShaderType shader_type)
924{
925 return user_key | (shader_type << 20);
926}
927
928/**
929 * vmw_shader_remove - Stage a compat shader for removal.
930 *
931 * @man: Pointer to the compat shader manager identifying the shader namespace.
932 * @user_key: The key that is used to identify the shader. The key is
933 * unique to the shader type.
934 * @shader_type: Shader type.
935 * @list: Caller's list of staged command buffer resource actions.
936 */
937int vmw_shader_remove(struct vmw_cmdbuf_res_manager *man,
938 u32 user_key, SVGA3dShaderType shader_type,
939 struct list_head *list)
940{
941 struct vmw_resource *dummy;
942
943 if (!vmw_shader_id_ok(user_key, shader_type))
944 return -EINVAL;
945
946 return vmw_cmdbuf_res_remove(man, vmw_cmdbuf_res_shader,
947 vmw_shader_key(user_key, shader_type),
948 list, &dummy);
949}
950
951/**
952 * vmw_compat_shader_add - Create a compat shader and stage it for addition
953 * as a command buffer managed resource.
954 *
955 * @man: Pointer to the compat shader manager identifying the shader namespace.
956 * @user_key: The key that is used to identify the shader. The key is
957 * unique to the shader type.
958 * @bytecode: Pointer to the bytecode of the shader.
959 * @shader_type: Shader type.
960 * @tfile: Pointer to a struct ttm_object_file that the guest-backed shader is
961 * to be created with.
962 * @list: Caller's list of staged command buffer resource actions.
963 *
964 */
965int vmw_compat_shader_add(struct vmw_private *dev_priv,
966 struct vmw_cmdbuf_res_manager *man,
967 u32 user_key, const void *bytecode,
968 SVGA3dShaderType shader_type,
969 size_t size,
970 struct list_head *list)
971{
972 struct vmw_dma_buffer *buf;
973 struct ttm_bo_kmap_obj map;
974 bool is_iomem;
975 int ret;
976 struct vmw_resource *res;
977
978 if (!vmw_shader_id_ok(user_key, shader_type))
979 return -EINVAL;
980
981 /* Allocate and pin a DMA buffer */
982 buf = kzalloc(sizeof(*buf), GFP_KERNEL);
983 if (unlikely(buf == NULL))
984 return -ENOMEM;
985
986 ret = vmw_dmabuf_init(dev_priv, buf, size, &vmw_sys_ne_placement,
987 true, vmw_dmabuf_bo_free);
988 if (unlikely(ret != 0))
989 goto out;
990
991 ret = ttm_bo_reserve(&buf->base, false, true, false, NULL);
992 if (unlikely(ret != 0))
993 goto no_reserve;
994
995 /* Map and copy shader bytecode. */
996 ret = ttm_bo_kmap(&buf->base, 0, PAGE_ALIGN(size) >> PAGE_SHIFT,
997 &map);
998 if (unlikely(ret != 0)) {
999 ttm_bo_unreserve(&buf->base);
1000 goto no_reserve;
1001 }
1002
1003 memcpy(ttm_kmap_obj_virtual(&map, &is_iomem), bytecode, size);
1004 WARN_ON(is_iomem);
1005
1006 ttm_bo_kunmap(&map);
1007 ret = ttm_bo_validate(&buf->base, &vmw_sys_placement, false, true);
1008 WARN_ON(ret != 0);
1009 ttm_bo_unreserve(&buf->base);
1010
1011 res = vmw_shader_alloc(dev_priv, buf, size, 0, shader_type);
1012 if (unlikely(ret != 0))
1013 goto no_reserve;
1014
1015 ret = vmw_cmdbuf_res_add(man, vmw_cmdbuf_res_shader,
1016 vmw_shader_key(user_key, shader_type),
1017 res, list);
1018 vmw_resource_unreference(&res);
1019no_reserve:
1020 vmw_dmabuf_unreference(&buf);
1021out:
1022 return ret;
1023}
1024
1025/**
1026 * vmw_shader_lookup - Look up a compat shader
1027 *
1028 * @man: Pointer to the command buffer managed resource manager identifying
1029 * the shader namespace.
1030 * @user_key: The user space id of the shader.
1031 * @shader_type: The shader type.
1032 *
1033 * Returns a refcounted pointer to a struct vmw_resource if the shader was
1034 * found. An error pointer otherwise.
1035 */
1036struct vmw_resource *
1037vmw_shader_lookup(struct vmw_cmdbuf_res_manager *man,
1038 u32 user_key,
1039 SVGA3dShaderType shader_type)
1040{
1041 if (!vmw_shader_id_ok(user_key, shader_type))
1042 return ERR_PTR(-EINVAL);
1043
1044 return vmw_cmdbuf_res_lookup(man, vmw_cmdbuf_res_shader,
1045 vmw_shader_key(user_key, shader_type));
1046}
1047
1048int vmw_shader_define_ioctl(struct drm_device *dev, void *data,
1049 struct drm_file *file_priv)
1050{
1051 struct drm_vmw_shader_create_arg *arg =
1052 (struct drm_vmw_shader_create_arg *)data;
1053
1054 return vmw_shader_define(dev, file_priv, arg->shader_type,
1055 arg->buffer_handle,
1056 arg->size, arg->offset,
1057 0, 0,
1058 &arg->shader_handle);
1059}
1/**************************************************************************
2 *
3 * Copyright © 2009-2012 VMware, Inc., Palo Alto, CA., USA
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
16 * of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
21 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
22 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
23 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
24 * USE OR OTHER DEALINGS IN THE SOFTWARE.
25 *
26 **************************************************************************/
27
28#include "vmwgfx_drv.h"
29#include "vmwgfx_resource_priv.h"
30#include "ttm/ttm_placement.h"
31
32#define VMW_COMPAT_SHADER_HT_ORDER 12
33
34struct vmw_shader {
35 struct vmw_resource res;
36 SVGA3dShaderType type;
37 uint32_t size;
38};
39
40struct vmw_user_shader {
41 struct ttm_base_object base;
42 struct vmw_shader shader;
43};
44
45/**
46 * enum vmw_compat_shader_state - Staging state for compat shaders
47 */
48enum vmw_compat_shader_state {
49 VMW_COMPAT_COMMITED,
50 VMW_COMPAT_ADD,
51 VMW_COMPAT_DEL
52};
53
54/**
55 * struct vmw_compat_shader - Metadata for compat shaders.
56 *
57 * @handle: The TTM handle of the guest backed shader.
58 * @tfile: The struct ttm_object_file the guest backed shader is registered
59 * with.
60 * @hash: Hash item for lookup.
61 * @head: List head for staging lists or the compat shader manager list.
62 * @state: Staging state.
63 *
64 * The structure is protected by the cmdbuf lock.
65 */
66struct vmw_compat_shader {
67 u32 handle;
68 struct ttm_object_file *tfile;
69 struct drm_hash_item hash;
70 struct list_head head;
71 enum vmw_compat_shader_state state;
72};
73
74/**
75 * struct vmw_compat_shader_manager - Compat shader manager.
76 *
77 * @shaders: Hash table containing staged and commited compat shaders
78 * @list: List of commited shaders.
79 * @dev_priv: Pointer to a device private structure.
80 *
81 * @shaders and @list are protected by the cmdbuf mutex for now.
82 */
83struct vmw_compat_shader_manager {
84 struct drm_open_hash shaders;
85 struct list_head list;
86 struct vmw_private *dev_priv;
87};
88
89static void vmw_user_shader_free(struct vmw_resource *res);
90static struct vmw_resource *
91vmw_user_shader_base_to_res(struct ttm_base_object *base);
92
93static int vmw_gb_shader_create(struct vmw_resource *res);
94static int vmw_gb_shader_bind(struct vmw_resource *res,
95 struct ttm_validate_buffer *val_buf);
96static int vmw_gb_shader_unbind(struct vmw_resource *res,
97 bool readback,
98 struct ttm_validate_buffer *val_buf);
99static int vmw_gb_shader_destroy(struct vmw_resource *res);
100
101static uint64_t vmw_user_shader_size;
102
103static const struct vmw_user_resource_conv user_shader_conv = {
104 .object_type = VMW_RES_SHADER,
105 .base_obj_to_res = vmw_user_shader_base_to_res,
106 .res_free = vmw_user_shader_free
107};
108
109const struct vmw_user_resource_conv *user_shader_converter =
110 &user_shader_conv;
111
112
113static const struct vmw_res_func vmw_gb_shader_func = {
114 .res_type = vmw_res_shader,
115 .needs_backup = true,
116 .may_evict = true,
117 .type_name = "guest backed shaders",
118 .backup_placement = &vmw_mob_placement,
119 .create = vmw_gb_shader_create,
120 .destroy = vmw_gb_shader_destroy,
121 .bind = vmw_gb_shader_bind,
122 .unbind = vmw_gb_shader_unbind
123};
124
125/**
126 * Shader management:
127 */
128
129static inline struct vmw_shader *
130vmw_res_to_shader(struct vmw_resource *res)
131{
132 return container_of(res, struct vmw_shader, res);
133}
134
135static void vmw_hw_shader_destroy(struct vmw_resource *res)
136{
137 (void) vmw_gb_shader_destroy(res);
138}
139
140static int vmw_gb_shader_init(struct vmw_private *dev_priv,
141 struct vmw_resource *res,
142 uint32_t size,
143 uint64_t offset,
144 SVGA3dShaderType type,
145 struct vmw_dma_buffer *byte_code,
146 void (*res_free) (struct vmw_resource *res))
147{
148 struct vmw_shader *shader = vmw_res_to_shader(res);
149 int ret;
150
151 ret = vmw_resource_init(dev_priv, res, true,
152 res_free, &vmw_gb_shader_func);
153
154
155 if (unlikely(ret != 0)) {
156 if (res_free)
157 res_free(res);
158 else
159 kfree(res);
160 return ret;
161 }
162
163 res->backup_size = size;
164 if (byte_code) {
165 res->backup = vmw_dmabuf_reference(byte_code);
166 res->backup_offset = offset;
167 }
168 shader->size = size;
169 shader->type = type;
170
171 vmw_resource_activate(res, vmw_hw_shader_destroy);
172 return 0;
173}
174
175static int vmw_gb_shader_create(struct vmw_resource *res)
176{
177 struct vmw_private *dev_priv = res->dev_priv;
178 struct vmw_shader *shader = vmw_res_to_shader(res);
179 int ret;
180 struct {
181 SVGA3dCmdHeader header;
182 SVGA3dCmdDefineGBShader body;
183 } *cmd;
184
185 if (likely(res->id != -1))
186 return 0;
187
188 ret = vmw_resource_alloc_id(res);
189 if (unlikely(ret != 0)) {
190 DRM_ERROR("Failed to allocate a shader id.\n");
191 goto out_no_id;
192 }
193
194 if (unlikely(res->id >= VMWGFX_NUM_GB_SHADER)) {
195 ret = -EBUSY;
196 goto out_no_fifo;
197 }
198
199 cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
200 if (unlikely(cmd == NULL)) {
201 DRM_ERROR("Failed reserving FIFO space for shader "
202 "creation.\n");
203 ret = -ENOMEM;
204 goto out_no_fifo;
205 }
206
207 cmd->header.id = SVGA_3D_CMD_DEFINE_GB_SHADER;
208 cmd->header.size = sizeof(cmd->body);
209 cmd->body.shid = res->id;
210 cmd->body.type = shader->type;
211 cmd->body.sizeInBytes = shader->size;
212 vmw_fifo_commit(dev_priv, sizeof(*cmd));
213 (void) vmw_3d_resource_inc(dev_priv, false);
214
215 return 0;
216
217out_no_fifo:
218 vmw_resource_release_id(res);
219out_no_id:
220 return ret;
221}
222
223static int vmw_gb_shader_bind(struct vmw_resource *res,
224 struct ttm_validate_buffer *val_buf)
225{
226 struct vmw_private *dev_priv = res->dev_priv;
227 struct {
228 SVGA3dCmdHeader header;
229 SVGA3dCmdBindGBShader body;
230 } *cmd;
231 struct ttm_buffer_object *bo = val_buf->bo;
232
233 BUG_ON(bo->mem.mem_type != VMW_PL_MOB);
234
235 cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
236 if (unlikely(cmd == NULL)) {
237 DRM_ERROR("Failed reserving FIFO space for shader "
238 "binding.\n");
239 return -ENOMEM;
240 }
241
242 cmd->header.id = SVGA_3D_CMD_BIND_GB_SHADER;
243 cmd->header.size = sizeof(cmd->body);
244 cmd->body.shid = res->id;
245 cmd->body.mobid = bo->mem.start;
246 cmd->body.offsetInBytes = 0;
247 res->backup_dirty = false;
248 vmw_fifo_commit(dev_priv, sizeof(*cmd));
249
250 return 0;
251}
252
253static int vmw_gb_shader_unbind(struct vmw_resource *res,
254 bool readback,
255 struct ttm_validate_buffer *val_buf)
256{
257 struct vmw_private *dev_priv = res->dev_priv;
258 struct {
259 SVGA3dCmdHeader header;
260 SVGA3dCmdBindGBShader body;
261 } *cmd;
262 struct vmw_fence_obj *fence;
263
264 BUG_ON(res->backup->base.mem.mem_type != VMW_PL_MOB);
265
266 cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
267 if (unlikely(cmd == NULL)) {
268 DRM_ERROR("Failed reserving FIFO space for shader "
269 "unbinding.\n");
270 return -ENOMEM;
271 }
272
273 cmd->header.id = SVGA_3D_CMD_BIND_GB_SHADER;
274 cmd->header.size = sizeof(cmd->body);
275 cmd->body.shid = res->id;
276 cmd->body.mobid = SVGA3D_INVALID_ID;
277 cmd->body.offsetInBytes = 0;
278 vmw_fifo_commit(dev_priv, sizeof(*cmd));
279
280 /*
281 * Create a fence object and fence the backup buffer.
282 */
283
284 (void) vmw_execbuf_fence_commands(NULL, dev_priv,
285 &fence, NULL);
286
287 vmw_fence_single_bo(val_buf->bo, fence);
288
289 if (likely(fence != NULL))
290 vmw_fence_obj_unreference(&fence);
291
292 return 0;
293}
294
295static int vmw_gb_shader_destroy(struct vmw_resource *res)
296{
297 struct vmw_private *dev_priv = res->dev_priv;
298 struct {
299 SVGA3dCmdHeader header;
300 SVGA3dCmdDestroyGBShader body;
301 } *cmd;
302
303 if (likely(res->id == -1))
304 return 0;
305
306 mutex_lock(&dev_priv->binding_mutex);
307 vmw_context_binding_res_list_scrub(&res->binding_head);
308
309 cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
310 if (unlikely(cmd == NULL)) {
311 DRM_ERROR("Failed reserving FIFO space for shader "
312 "destruction.\n");
313 mutex_unlock(&dev_priv->binding_mutex);
314 return -ENOMEM;
315 }
316
317 cmd->header.id = SVGA_3D_CMD_DESTROY_GB_SHADER;
318 cmd->header.size = sizeof(cmd->body);
319 cmd->body.shid = res->id;
320 vmw_fifo_commit(dev_priv, sizeof(*cmd));
321 mutex_unlock(&dev_priv->binding_mutex);
322 vmw_resource_release_id(res);
323 vmw_3d_resource_dec(dev_priv, false);
324
325 return 0;
326}
327
328/**
329 * User-space shader management:
330 */
331
332static struct vmw_resource *
333vmw_user_shader_base_to_res(struct ttm_base_object *base)
334{
335 return &(container_of(base, struct vmw_user_shader, base)->
336 shader.res);
337}
338
339static void vmw_user_shader_free(struct vmw_resource *res)
340{
341 struct vmw_user_shader *ushader =
342 container_of(res, struct vmw_user_shader, shader.res);
343 struct vmw_private *dev_priv = res->dev_priv;
344
345 ttm_base_object_kfree(ushader, base);
346 ttm_mem_global_free(vmw_mem_glob(dev_priv),
347 vmw_user_shader_size);
348}
349
350/**
351 * This function is called when user space has no more references on the
352 * base object. It releases the base-object's reference on the resource object.
353 */
354
355static void vmw_user_shader_base_release(struct ttm_base_object **p_base)
356{
357 struct ttm_base_object *base = *p_base;
358 struct vmw_resource *res = vmw_user_shader_base_to_res(base);
359
360 *p_base = NULL;
361 vmw_resource_unreference(&res);
362}
363
364int vmw_shader_destroy_ioctl(struct drm_device *dev, void *data,
365 struct drm_file *file_priv)
366{
367 struct drm_vmw_shader_arg *arg = (struct drm_vmw_shader_arg *)data;
368 struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
369
370 return ttm_ref_object_base_unref(tfile, arg->handle,
371 TTM_REF_USAGE);
372}
373
374static int vmw_shader_alloc(struct vmw_private *dev_priv,
375 struct vmw_dma_buffer *buffer,
376 size_t shader_size,
377 size_t offset,
378 SVGA3dShaderType shader_type,
379 struct ttm_object_file *tfile,
380 u32 *handle)
381{
382 struct vmw_user_shader *ushader;
383 struct vmw_resource *res, *tmp;
384 int ret;
385
386 /*
387 * Approximate idr memory usage with 128 bytes. It will be limited
388 * by maximum number_of shaders anyway.
389 */
390 if (unlikely(vmw_user_shader_size == 0))
391 vmw_user_shader_size =
392 ttm_round_pot(sizeof(struct vmw_user_shader)) + 128;
393
394 ret = ttm_mem_global_alloc(vmw_mem_glob(dev_priv),
395 vmw_user_shader_size,
396 false, true);
397 if (unlikely(ret != 0)) {
398 if (ret != -ERESTARTSYS)
399 DRM_ERROR("Out of graphics memory for shader "
400 "creation.\n");
401 goto out;
402 }
403
404 ushader = kzalloc(sizeof(*ushader), GFP_KERNEL);
405 if (unlikely(ushader == NULL)) {
406 ttm_mem_global_free(vmw_mem_glob(dev_priv),
407 vmw_user_shader_size);
408 ret = -ENOMEM;
409 goto out;
410 }
411
412 res = &ushader->shader.res;
413 ushader->base.shareable = false;
414 ushader->base.tfile = NULL;
415
416 /*
417 * From here on, the destructor takes over resource freeing.
418 */
419
420 ret = vmw_gb_shader_init(dev_priv, res, shader_size,
421 offset, shader_type, buffer,
422 vmw_user_shader_free);
423 if (unlikely(ret != 0))
424 goto out;
425
426 tmp = vmw_resource_reference(res);
427 ret = ttm_base_object_init(tfile, &ushader->base, false,
428 VMW_RES_SHADER,
429 &vmw_user_shader_base_release, NULL);
430
431 if (unlikely(ret != 0)) {
432 vmw_resource_unreference(&tmp);
433 goto out_err;
434 }
435
436 if (handle)
437 *handle = ushader->base.hash.key;
438out_err:
439 vmw_resource_unreference(&res);
440out:
441 return ret;
442}
443
444
445int vmw_shader_define_ioctl(struct drm_device *dev, void *data,
446 struct drm_file *file_priv)
447{
448 struct vmw_private *dev_priv = vmw_priv(dev);
449 struct drm_vmw_shader_create_arg *arg =
450 (struct drm_vmw_shader_create_arg *)data;
451 struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
452 struct vmw_dma_buffer *buffer = NULL;
453 SVGA3dShaderType shader_type;
454 int ret;
455
456 if (arg->buffer_handle != SVGA3D_INVALID_ID) {
457 ret = vmw_user_dmabuf_lookup(tfile, arg->buffer_handle,
458 &buffer);
459 if (unlikely(ret != 0)) {
460 DRM_ERROR("Could not find buffer for shader "
461 "creation.\n");
462 return ret;
463 }
464
465 if ((u64)buffer->base.num_pages * PAGE_SIZE <
466 (u64)arg->size + (u64)arg->offset) {
467 DRM_ERROR("Illegal buffer- or shader size.\n");
468 ret = -EINVAL;
469 goto out_bad_arg;
470 }
471 }
472
473 switch (arg->shader_type) {
474 case drm_vmw_shader_type_vs:
475 shader_type = SVGA3D_SHADERTYPE_VS;
476 break;
477 case drm_vmw_shader_type_ps:
478 shader_type = SVGA3D_SHADERTYPE_PS;
479 break;
480 case drm_vmw_shader_type_gs:
481 shader_type = SVGA3D_SHADERTYPE_GS;
482 break;
483 default:
484 DRM_ERROR("Illegal shader type.\n");
485 ret = -EINVAL;
486 goto out_bad_arg;
487 }
488
489 ret = ttm_read_lock(&dev_priv->reservation_sem, true);
490 if (unlikely(ret != 0))
491 goto out_bad_arg;
492
493 ret = vmw_shader_alloc(dev_priv, buffer, arg->size, arg->offset,
494 shader_type, tfile, &arg->shader_handle);
495
496 ttm_read_unlock(&dev_priv->reservation_sem);
497out_bad_arg:
498 vmw_dmabuf_unreference(&buffer);
499 return ret;
500}
501
502/**
503 * vmw_compat_shader_lookup - Look up a compat shader
504 *
505 * @man: Pointer to the compat shader manager.
506 * @shader_type: The shader type, that combined with the user_key identifies
507 * the shader.
508 * @user_key: On entry, this should be a pointer to the user_key.
509 * On successful exit, it will contain the guest-backed shader's TTM handle.
510 *
511 * Returns 0 on success. Non-zero on failure, in which case the value pointed
512 * to by @user_key is unmodified.
513 */
514int vmw_compat_shader_lookup(struct vmw_compat_shader_manager *man,
515 SVGA3dShaderType shader_type,
516 u32 *user_key)
517{
518 struct drm_hash_item *hash;
519 int ret;
520 unsigned long key = *user_key | (shader_type << 24);
521
522 ret = drm_ht_find_item(&man->shaders, key, &hash);
523 if (unlikely(ret != 0))
524 return ret;
525
526 *user_key = drm_hash_entry(hash, struct vmw_compat_shader,
527 hash)->handle;
528
529 return 0;
530}
531
532/**
533 * vmw_compat_shader_free - Free a compat shader.
534 *
535 * @man: Pointer to the compat shader manager.
536 * @entry: Pointer to a struct vmw_compat_shader.
537 *
538 * Frees a struct vmw_compat_shder entry and drops its reference to the
539 * guest backed shader.
540 */
541static void vmw_compat_shader_free(struct vmw_compat_shader_manager *man,
542 struct vmw_compat_shader *entry)
543{
544 list_del(&entry->head);
545 WARN_ON(drm_ht_remove_item(&man->shaders, &entry->hash));
546 WARN_ON(ttm_ref_object_base_unref(entry->tfile, entry->handle,
547 TTM_REF_USAGE));
548 kfree(entry);
549}
550
551/**
552 * vmw_compat_shaders_commit - Commit a list of compat shader actions.
553 *
554 * @man: Pointer to the compat shader manager.
555 * @list: Caller's list of compat shader actions.
556 *
557 * This function commits a list of compat shader additions or removals.
558 * It is typically called when the execbuf ioctl call triggering these
559 * actions has commited the fifo contents to the device.
560 */
561void vmw_compat_shaders_commit(struct vmw_compat_shader_manager *man,
562 struct list_head *list)
563{
564 struct vmw_compat_shader *entry, *next;
565
566 list_for_each_entry_safe(entry, next, list, head) {
567 list_del(&entry->head);
568 switch (entry->state) {
569 case VMW_COMPAT_ADD:
570 entry->state = VMW_COMPAT_COMMITED;
571 list_add_tail(&entry->head, &man->list);
572 break;
573 case VMW_COMPAT_DEL:
574 ttm_ref_object_base_unref(entry->tfile, entry->handle,
575 TTM_REF_USAGE);
576 kfree(entry);
577 break;
578 default:
579 BUG();
580 break;
581 }
582 }
583}
584
585/**
586 * vmw_compat_shaders_revert - Revert a list of compat shader actions
587 *
588 * @man: Pointer to the compat shader manager.
589 * @list: Caller's list of compat shader actions.
590 *
591 * This function reverts a list of compat shader additions or removals.
592 * It is typically called when the execbuf ioctl call triggering these
593 * actions failed for some reason, and the command stream was never
594 * submitted.
595 */
596void vmw_compat_shaders_revert(struct vmw_compat_shader_manager *man,
597 struct list_head *list)
598{
599 struct vmw_compat_shader *entry, *next;
600 int ret;
601
602 list_for_each_entry_safe(entry, next, list, head) {
603 switch (entry->state) {
604 case VMW_COMPAT_ADD:
605 vmw_compat_shader_free(man, entry);
606 break;
607 case VMW_COMPAT_DEL:
608 ret = drm_ht_insert_item(&man->shaders, &entry->hash);
609 list_del(&entry->head);
610 list_add_tail(&entry->head, &man->list);
611 entry->state = VMW_COMPAT_COMMITED;
612 break;
613 default:
614 BUG();
615 break;
616 }
617 }
618}
619
620/**
621 * vmw_compat_shader_remove - Stage a compat shader for removal.
622 *
623 * @man: Pointer to the compat shader manager
624 * @user_key: The key that is used to identify the shader. The key is
625 * unique to the shader type.
626 * @shader_type: Shader type.
627 * @list: Caller's list of staged shader actions.
628 *
629 * This function stages a compat shader for removal and removes the key from
630 * the shader manager's hash table. If the shader was previously only staged
631 * for addition it is completely removed (But the execbuf code may keep a
632 * reference if it was bound to a context between addition and removal). If
633 * it was previously commited to the manager, it is staged for removal.
634 */
635int vmw_compat_shader_remove(struct vmw_compat_shader_manager *man,
636 u32 user_key, SVGA3dShaderType shader_type,
637 struct list_head *list)
638{
639 struct vmw_compat_shader *entry;
640 struct drm_hash_item *hash;
641 int ret;
642
643 ret = drm_ht_find_item(&man->shaders, user_key | (shader_type << 24),
644 &hash);
645 if (likely(ret != 0))
646 return -EINVAL;
647
648 entry = drm_hash_entry(hash, struct vmw_compat_shader, hash);
649
650 switch (entry->state) {
651 case VMW_COMPAT_ADD:
652 vmw_compat_shader_free(man, entry);
653 break;
654 case VMW_COMPAT_COMMITED:
655 (void) drm_ht_remove_item(&man->shaders, &entry->hash);
656 list_del(&entry->head);
657 entry->state = VMW_COMPAT_DEL;
658 list_add_tail(&entry->head, list);
659 break;
660 default:
661 BUG();
662 break;
663 }
664
665 return 0;
666}
667
668/**
669 * vmw_compat_shader_add - Create a compat shader and add the
670 * key to the manager
671 *
672 * @man: Pointer to the compat shader manager
673 * @user_key: The key that is used to identify the shader. The key is
674 * unique to the shader type.
675 * @bytecode: Pointer to the bytecode of the shader.
676 * @shader_type: Shader type.
677 * @tfile: Pointer to a struct ttm_object_file that the guest-backed shader is
678 * to be created with.
679 * @list: Caller's list of staged shader actions.
680 *
681 * Note that only the key is added to the shader manager's hash table.
682 * The shader is not yet added to the shader manager's list of shaders.
683 */
684int vmw_compat_shader_add(struct vmw_compat_shader_manager *man,
685 u32 user_key, const void *bytecode,
686 SVGA3dShaderType shader_type,
687 size_t size,
688 struct ttm_object_file *tfile,
689 struct list_head *list)
690{
691 struct vmw_dma_buffer *buf;
692 struct ttm_bo_kmap_obj map;
693 bool is_iomem;
694 struct vmw_compat_shader *compat;
695 u32 handle;
696 int ret;
697
698 if (user_key > ((1 << 24) - 1) || (unsigned) shader_type > 16)
699 return -EINVAL;
700
701 /* Allocate and pin a DMA buffer */
702 buf = kzalloc(sizeof(*buf), GFP_KERNEL);
703 if (unlikely(buf == NULL))
704 return -ENOMEM;
705
706 ret = vmw_dmabuf_init(man->dev_priv, buf, size, &vmw_sys_ne_placement,
707 true, vmw_dmabuf_bo_free);
708 if (unlikely(ret != 0))
709 goto out;
710
711 ret = ttm_bo_reserve(&buf->base, false, true, false, NULL);
712 if (unlikely(ret != 0))
713 goto no_reserve;
714
715 /* Map and copy shader bytecode. */
716 ret = ttm_bo_kmap(&buf->base, 0, PAGE_ALIGN(size) >> PAGE_SHIFT,
717 &map);
718 if (unlikely(ret != 0)) {
719 ttm_bo_unreserve(&buf->base);
720 goto no_reserve;
721 }
722
723 memcpy(ttm_kmap_obj_virtual(&map, &is_iomem), bytecode, size);
724 WARN_ON(is_iomem);
725
726 ttm_bo_kunmap(&map);
727 ret = ttm_bo_validate(&buf->base, &vmw_sys_placement, false, true);
728 WARN_ON(ret != 0);
729 ttm_bo_unreserve(&buf->base);
730
731 /* Create a guest-backed shader container backed by the dma buffer */
732 ret = vmw_shader_alloc(man->dev_priv, buf, size, 0, shader_type,
733 tfile, &handle);
734 vmw_dmabuf_unreference(&buf);
735 if (unlikely(ret != 0))
736 goto no_reserve;
737 /*
738 * Create a compat shader structure and stage it for insertion
739 * in the manager
740 */
741 compat = kzalloc(sizeof(*compat), GFP_KERNEL);
742 if (compat == NULL)
743 goto no_compat;
744
745 compat->hash.key = user_key | (shader_type << 24);
746 ret = drm_ht_insert_item(&man->shaders, &compat->hash);
747 if (unlikely(ret != 0))
748 goto out_invalid_key;
749
750 compat->state = VMW_COMPAT_ADD;
751 compat->handle = handle;
752 compat->tfile = tfile;
753 list_add_tail(&compat->head, list);
754
755 return 0;
756
757out_invalid_key:
758 kfree(compat);
759no_compat:
760 ttm_ref_object_base_unref(tfile, handle, TTM_REF_USAGE);
761no_reserve:
762out:
763 return ret;
764}
765
766/**
767 * vmw_compat_shader_man_create - Create a compat shader manager
768 *
769 * @dev_priv: Pointer to a device private structure.
770 *
771 * Typically done at file open time. If successful returns a pointer to a
772 * compat shader manager. Otherwise returns an error pointer.
773 */
774struct vmw_compat_shader_manager *
775vmw_compat_shader_man_create(struct vmw_private *dev_priv)
776{
777 struct vmw_compat_shader_manager *man;
778 int ret;
779
780 man = kzalloc(sizeof(*man), GFP_KERNEL);
781 if (man == NULL)
782 return ERR_PTR(-ENOMEM);
783
784 man->dev_priv = dev_priv;
785 INIT_LIST_HEAD(&man->list);
786 ret = drm_ht_create(&man->shaders, VMW_COMPAT_SHADER_HT_ORDER);
787 if (ret == 0)
788 return man;
789
790 kfree(man);
791 return ERR_PTR(ret);
792}
793
794/**
795 * vmw_compat_shader_man_destroy - Destroy a compat shader manager
796 *
797 * @man: Pointer to the shader manager to destroy.
798 *
799 * Typically done at file close time.
800 */
801void vmw_compat_shader_man_destroy(struct vmw_compat_shader_manager *man)
802{
803 struct vmw_compat_shader *entry, *next;
804
805 mutex_lock(&man->dev_priv->cmdbuf_mutex);
806 list_for_each_entry_safe(entry, next, &man->list, head)
807 vmw_compat_shader_free(man, entry);
808
809 mutex_unlock(&man->dev_priv->cmdbuf_mutex);
810 kfree(man);
811}