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1/**************************************************************************
2 *
3 * Copyright © 2014-2015 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 * Treat context OTables as resources to make use of the resource
29 * backing MOB eviction mechanism, that is used to read back the COTable
30 * whenever the backing MOB is evicted.
31 */
32
33#include "vmwgfx_drv.h"
34#include "vmwgfx_resource_priv.h"
35#include <ttm/ttm_placement.h>
36#include "vmwgfx_so.h"
37
38/**
39 * struct vmw_cotable - Context Object Table resource
40 *
41 * @res: struct vmw_resource we are deriving from.
42 * @ctx: non-refcounted pointer to the owning context.
43 * @size_read_back: Size of data read back during eviction.
44 * @seen_entries: Seen entries in command stream for this cotable.
45 * @type: The cotable type.
46 * @scrubbed: Whether the cotable has been scrubbed.
47 * @resource_list: List of resources in the cotable.
48 */
49struct vmw_cotable {
50 struct vmw_resource res;
51 struct vmw_resource *ctx;
52 size_t size_read_back;
53 int seen_entries;
54 u32 type;
55 bool scrubbed;
56 struct list_head resource_list;
57};
58
59/**
60 * struct vmw_cotable_info - Static info about cotable types
61 *
62 * @min_initial_entries: Min number of initial intries at cotable allocation
63 * for this cotable type.
64 * @size: Size of each entry.
65 */
66struct vmw_cotable_info {
67 u32 min_initial_entries;
68 u32 size;
69 void (*unbind_func)(struct vmw_private *, struct list_head *,
70 bool);
71};
72
73static const struct vmw_cotable_info co_info[] = {
74 {1, sizeof(SVGACOTableDXRTViewEntry), &vmw_view_cotable_list_destroy},
75 {1, sizeof(SVGACOTableDXDSViewEntry), &vmw_view_cotable_list_destroy},
76 {1, sizeof(SVGACOTableDXSRViewEntry), &vmw_view_cotable_list_destroy},
77 {1, sizeof(SVGACOTableDXElementLayoutEntry), NULL},
78 {1, sizeof(SVGACOTableDXBlendStateEntry), NULL},
79 {1, sizeof(SVGACOTableDXDepthStencilEntry), NULL},
80 {1, sizeof(SVGACOTableDXRasterizerStateEntry), NULL},
81 {1, sizeof(SVGACOTableDXSamplerEntry), NULL},
82 {1, sizeof(SVGACOTableDXStreamOutputEntry), NULL},
83 {1, sizeof(SVGACOTableDXQueryEntry), NULL},
84 {1, sizeof(SVGACOTableDXShaderEntry), &vmw_dx_shader_cotable_list_scrub}
85};
86
87/*
88 * Cotables with bindings that we remove must be scrubbed first,
89 * otherwise, the device will swap in an invalid context when we remove
90 * bindings before scrubbing a cotable...
91 */
92const SVGACOTableType vmw_cotable_scrub_order[] = {
93 SVGA_COTABLE_RTVIEW,
94 SVGA_COTABLE_DSVIEW,
95 SVGA_COTABLE_SRVIEW,
96 SVGA_COTABLE_DXSHADER,
97 SVGA_COTABLE_ELEMENTLAYOUT,
98 SVGA_COTABLE_BLENDSTATE,
99 SVGA_COTABLE_DEPTHSTENCIL,
100 SVGA_COTABLE_RASTERIZERSTATE,
101 SVGA_COTABLE_SAMPLER,
102 SVGA_COTABLE_STREAMOUTPUT,
103 SVGA_COTABLE_DXQUERY,
104};
105
106static int vmw_cotable_bind(struct vmw_resource *res,
107 struct ttm_validate_buffer *val_buf);
108static int vmw_cotable_unbind(struct vmw_resource *res,
109 bool readback,
110 struct ttm_validate_buffer *val_buf);
111static int vmw_cotable_create(struct vmw_resource *res);
112static int vmw_cotable_destroy(struct vmw_resource *res);
113
114static const struct vmw_res_func vmw_cotable_func = {
115 .res_type = vmw_res_cotable,
116 .needs_backup = true,
117 .may_evict = true,
118 .type_name = "context guest backed object tables",
119 .backup_placement = &vmw_mob_placement,
120 .create = vmw_cotable_create,
121 .destroy = vmw_cotable_destroy,
122 .bind = vmw_cotable_bind,
123 .unbind = vmw_cotable_unbind,
124};
125
126/**
127 * vmw_cotable - Convert a struct vmw_resource pointer to a struct
128 * vmw_cotable pointer
129 *
130 * @res: Pointer to the resource.
131 */
132static struct vmw_cotable *vmw_cotable(struct vmw_resource *res)
133{
134 return container_of(res, struct vmw_cotable, res);
135}
136
137/**
138 * vmw_cotable_destroy - Cotable resource destroy callback
139 *
140 * @res: Pointer to the cotable resource.
141 *
142 * There is no device cotable destroy command, so this function only
143 * makes sure that the resource id is set to invalid.
144 */
145static int vmw_cotable_destroy(struct vmw_resource *res)
146{
147 res->id = -1;
148 return 0;
149}
150
151/**
152 * vmw_cotable_unscrub - Undo a cotable unscrub operation
153 *
154 * @res: Pointer to the cotable resource
155 *
156 * This function issues commands to (re)bind the cotable to
157 * its backing mob, which needs to be validated and reserved at this point.
158 * This is identical to bind() except the function interface looks different.
159 */
160static int vmw_cotable_unscrub(struct vmw_resource *res)
161{
162 struct vmw_cotable *vcotbl = vmw_cotable(res);
163 struct vmw_private *dev_priv = res->dev_priv;
164 struct ttm_buffer_object *bo = &res->backup->base;
165 struct {
166 SVGA3dCmdHeader header;
167 SVGA3dCmdDXSetCOTable body;
168 } *cmd;
169
170 WARN_ON_ONCE(bo->mem.mem_type != VMW_PL_MOB);
171 lockdep_assert_held(&bo->resv->lock.base);
172
173 cmd = vmw_fifo_reserve_dx(dev_priv, sizeof(*cmd), SVGA3D_INVALID_ID);
174 if (!cmd) {
175 DRM_ERROR("Failed reserving FIFO space for cotable "
176 "binding.\n");
177 return -ENOMEM;
178 }
179
180 WARN_ON(vcotbl->ctx->id == SVGA3D_INVALID_ID);
181 WARN_ON(bo->mem.mem_type != VMW_PL_MOB);
182 cmd->header.id = SVGA_3D_CMD_DX_SET_COTABLE;
183 cmd->header.size = sizeof(cmd->body);
184 cmd->body.cid = vcotbl->ctx->id;
185 cmd->body.type = vcotbl->type;
186 cmd->body.mobid = bo->mem.start;
187 cmd->body.validSizeInBytes = vcotbl->size_read_back;
188
189 vmw_fifo_commit_flush(dev_priv, sizeof(*cmd));
190 vcotbl->scrubbed = false;
191
192 return 0;
193}
194
195/**
196 * vmw_cotable_bind - Undo a cotable unscrub operation
197 *
198 * @res: Pointer to the cotable resource
199 * @val_buf: Pointer to a struct ttm_validate_buffer prepared by the caller
200 * for convenience / fencing.
201 *
202 * This function issues commands to (re)bind the cotable to
203 * its backing mob, which needs to be validated and reserved at this point.
204 */
205static int vmw_cotable_bind(struct vmw_resource *res,
206 struct ttm_validate_buffer *val_buf)
207{
208 /*
209 * The create() callback may have changed @res->backup without
210 * the caller noticing, and with val_buf->bo still pointing to
211 * the old backup buffer. Although hackish, and not used currently,
212 * take the opportunity to correct the value here so that it's not
213 * misused in the future.
214 */
215 val_buf->bo = &res->backup->base;
216
217 return vmw_cotable_unscrub(res);
218}
219
220/**
221 * vmw_cotable_scrub - Scrub the cotable from the device.
222 *
223 * @res: Pointer to the cotable resource.
224 * @readback: Whether initiate a readback of the cotable data to the backup
225 * buffer.
226 *
227 * In some situations (context swapouts) it might be desirable to make the
228 * device forget about the cotable without performing a full unbind. A full
229 * unbind requires reserved backup buffers and it might not be possible to
230 * reserve them due to locking order violation issues. The vmw_cotable_scrub
231 * function implements a partial unbind() without that requirement but with the
232 * following restrictions.
233 * 1) Before the cotable is again used by the GPU, vmw_cotable_unscrub() must
234 * be called.
235 * 2) Before the cotable backing buffer is used by the CPU, or during the
236 * resource destruction, vmw_cotable_unbind() must be called.
237 */
238int vmw_cotable_scrub(struct vmw_resource *res, bool readback)
239{
240 struct vmw_cotable *vcotbl = vmw_cotable(res);
241 struct vmw_private *dev_priv = res->dev_priv;
242 size_t submit_size;
243
244 struct {
245 SVGA3dCmdHeader header;
246 SVGA3dCmdDXReadbackCOTable body;
247 } *cmd0;
248 struct {
249 SVGA3dCmdHeader header;
250 SVGA3dCmdDXSetCOTable body;
251 } *cmd1;
252
253 if (vcotbl->scrubbed)
254 return 0;
255
256 if (co_info[vcotbl->type].unbind_func)
257 co_info[vcotbl->type].unbind_func(dev_priv,
258 &vcotbl->resource_list,
259 readback);
260 submit_size = sizeof(*cmd1);
261 if (readback)
262 submit_size += sizeof(*cmd0);
263
264 cmd1 = vmw_fifo_reserve_dx(dev_priv, submit_size, SVGA3D_INVALID_ID);
265 if (!cmd1) {
266 DRM_ERROR("Failed reserving FIFO space for cotable "
267 "unbinding.\n");
268 return -ENOMEM;
269 }
270
271 vcotbl->size_read_back = 0;
272 if (readback) {
273 cmd0 = (void *) cmd1;
274 cmd0->header.id = SVGA_3D_CMD_DX_READBACK_COTABLE;
275 cmd0->header.size = sizeof(cmd0->body);
276 cmd0->body.cid = vcotbl->ctx->id;
277 cmd0->body.type = vcotbl->type;
278 cmd1 = (void *) &cmd0[1];
279 vcotbl->size_read_back = res->backup_size;
280 }
281 cmd1->header.id = SVGA_3D_CMD_DX_SET_COTABLE;
282 cmd1->header.size = sizeof(cmd1->body);
283 cmd1->body.cid = vcotbl->ctx->id;
284 cmd1->body.type = vcotbl->type;
285 cmd1->body.mobid = SVGA3D_INVALID_ID;
286 cmd1->body.validSizeInBytes = 0;
287 vmw_fifo_commit_flush(dev_priv, submit_size);
288 vcotbl->scrubbed = true;
289
290 /* Trigger a create() on next validate. */
291 res->id = -1;
292
293 return 0;
294}
295
296/**
297 * vmw_cotable_unbind - Cotable resource unbind callback
298 *
299 * @res: Pointer to the cotable resource.
300 * @readback: Whether to read back cotable data to the backup buffer.
301 * val_buf: Pointer to a struct ttm_validate_buffer prepared by the caller
302 * for convenience / fencing.
303 *
304 * Unbinds the cotable from the device and fences the backup buffer.
305 */
306static int vmw_cotable_unbind(struct vmw_resource *res,
307 bool readback,
308 struct ttm_validate_buffer *val_buf)
309{
310 struct vmw_cotable *vcotbl = vmw_cotable(res);
311 struct vmw_private *dev_priv = res->dev_priv;
312 struct ttm_buffer_object *bo = val_buf->bo;
313 struct vmw_fence_obj *fence;
314
315 if (list_empty(&res->mob_head))
316 return 0;
317
318 WARN_ON_ONCE(bo->mem.mem_type != VMW_PL_MOB);
319 lockdep_assert_held(&bo->resv->lock.base);
320
321 mutex_lock(&dev_priv->binding_mutex);
322 if (!vcotbl->scrubbed)
323 vmw_dx_context_scrub_cotables(vcotbl->ctx, readback);
324 mutex_unlock(&dev_priv->binding_mutex);
325 (void) vmw_execbuf_fence_commands(NULL, dev_priv, &fence, NULL);
326 vmw_fence_single_bo(bo, fence);
327 if (likely(fence != NULL))
328 vmw_fence_obj_unreference(&fence);
329
330 return 0;
331}
332
333/**
334 * vmw_cotable_readback - Read back a cotable without unbinding.
335 *
336 * @res: The cotable resource.
337 *
338 * Reads back a cotable to its backing mob without scrubbing the MOB from
339 * the cotable. The MOB is fenced for subsequent CPU access.
340 */
341static int vmw_cotable_readback(struct vmw_resource *res)
342{
343 struct vmw_cotable *vcotbl = vmw_cotable(res);
344 struct vmw_private *dev_priv = res->dev_priv;
345
346 struct {
347 SVGA3dCmdHeader header;
348 SVGA3dCmdDXReadbackCOTable body;
349 } *cmd;
350 struct vmw_fence_obj *fence;
351
352 if (!vcotbl->scrubbed) {
353 cmd = vmw_fifo_reserve_dx(dev_priv, sizeof(*cmd),
354 SVGA3D_INVALID_ID);
355 if (!cmd) {
356 DRM_ERROR("Failed reserving FIFO space for cotable "
357 "readback.\n");
358 return -ENOMEM;
359 }
360 cmd->header.id = SVGA_3D_CMD_DX_READBACK_COTABLE;
361 cmd->header.size = sizeof(cmd->body);
362 cmd->body.cid = vcotbl->ctx->id;
363 cmd->body.type = vcotbl->type;
364 vcotbl->size_read_back = res->backup_size;
365 vmw_fifo_commit(dev_priv, sizeof(*cmd));
366 }
367
368 (void) vmw_execbuf_fence_commands(NULL, dev_priv, &fence, NULL);
369 vmw_fence_single_bo(&res->backup->base, fence);
370 vmw_fence_obj_unreference(&fence);
371
372 return 0;
373}
374
375/**
376 * vmw_cotable_resize - Resize a cotable.
377 *
378 * @res: The cotable resource.
379 * @new_size: The new size.
380 *
381 * Resizes a cotable and binds the new backup buffer.
382 * On failure the cotable is left intact.
383 * Important! This function may not fail once the MOB switch has been
384 * committed to hardware. That would put the device context in an
385 * invalid state which we can't currently recover from.
386 */
387static int vmw_cotable_resize(struct vmw_resource *res, size_t new_size)
388{
389 struct vmw_private *dev_priv = res->dev_priv;
390 struct vmw_cotable *vcotbl = vmw_cotable(res);
391 struct vmw_dma_buffer *buf, *old_buf = res->backup;
392 struct ttm_buffer_object *bo, *old_bo = &res->backup->base;
393 size_t old_size = res->backup_size;
394 size_t old_size_read_back = vcotbl->size_read_back;
395 size_t cur_size_read_back;
396 struct ttm_bo_kmap_obj old_map, new_map;
397 int ret;
398 size_t i;
399
400 ret = vmw_cotable_readback(res);
401 if (ret)
402 return ret;
403
404 cur_size_read_back = vcotbl->size_read_back;
405 vcotbl->size_read_back = old_size_read_back;
406
407 /*
408 * While device is processing, Allocate and reserve a buffer object
409 * for the new COTable. Initially pin the buffer object to make sure
410 * we can use tryreserve without failure.
411 */
412 buf = kzalloc(sizeof(*buf), GFP_KERNEL);
413 if (!buf)
414 return -ENOMEM;
415
416 ret = vmw_dmabuf_init(dev_priv, buf, new_size, &vmw_mob_ne_placement,
417 true, vmw_dmabuf_bo_free);
418 if (ret) {
419 DRM_ERROR("Failed initializing new cotable MOB.\n");
420 return ret;
421 }
422
423 bo = &buf->base;
424 WARN_ON_ONCE(ttm_bo_reserve(bo, false, true, false, NULL));
425
426 ret = ttm_bo_wait(old_bo, false, false, false);
427 if (unlikely(ret != 0)) {
428 DRM_ERROR("Failed waiting for cotable unbind.\n");
429 goto out_wait;
430 }
431
432 /*
433 * Do a page by page copy of COTables. This eliminates slow vmap()s.
434 * This should really be a TTM utility.
435 */
436 for (i = 0; i < old_bo->num_pages; ++i) {
437 bool dummy;
438
439 ret = ttm_bo_kmap(old_bo, i, 1, &old_map);
440 if (unlikely(ret != 0)) {
441 DRM_ERROR("Failed mapping old COTable on resize.\n");
442 goto out_wait;
443 }
444 ret = ttm_bo_kmap(bo, i, 1, &new_map);
445 if (unlikely(ret != 0)) {
446 DRM_ERROR("Failed mapping new COTable on resize.\n");
447 goto out_map_new;
448 }
449 memcpy(ttm_kmap_obj_virtual(&new_map, &dummy),
450 ttm_kmap_obj_virtual(&old_map, &dummy),
451 PAGE_SIZE);
452 ttm_bo_kunmap(&new_map);
453 ttm_bo_kunmap(&old_map);
454 }
455
456 /* Unpin new buffer, and switch backup buffers. */
457 ret = ttm_bo_validate(bo, &vmw_mob_placement, false, false);
458 if (unlikely(ret != 0)) {
459 DRM_ERROR("Failed validating new COTable backup buffer.\n");
460 goto out_wait;
461 }
462
463 res->backup = buf;
464 res->backup_size = new_size;
465 vcotbl->size_read_back = cur_size_read_back;
466
467 /*
468 * Now tell the device to switch. If this fails, then we need to
469 * revert the full resize.
470 */
471 ret = vmw_cotable_unscrub(res);
472 if (ret) {
473 DRM_ERROR("Failed switching COTable backup buffer.\n");
474 res->backup = old_buf;
475 res->backup_size = old_size;
476 vcotbl->size_read_back = old_size_read_back;
477 goto out_wait;
478 }
479
480 /* Let go of the old mob. */
481 list_del(&res->mob_head);
482 list_add_tail(&res->mob_head, &buf->res_list);
483 vmw_dmabuf_unreference(&old_buf);
484 res->id = vcotbl->type;
485
486 return 0;
487
488out_map_new:
489 ttm_bo_kunmap(&old_map);
490out_wait:
491 ttm_bo_unreserve(bo);
492 vmw_dmabuf_unreference(&buf);
493
494 return ret;
495}
496
497/**
498 * vmw_cotable_create - Cotable resource create callback
499 *
500 * @res: Pointer to a cotable resource.
501 *
502 * There is no separate create command for cotables, so this callback, which
503 * is called before bind() in the validation sequence is instead used for two
504 * things.
505 * 1) Unscrub the cotable if it is scrubbed and still attached to a backup
506 * buffer, that is, if @res->mob_head is non-empty.
507 * 2) Resize the cotable if needed.
508 */
509static int vmw_cotable_create(struct vmw_resource *res)
510{
511 struct vmw_cotable *vcotbl = vmw_cotable(res);
512 size_t new_size = res->backup_size;
513 size_t needed_size;
514 int ret;
515
516 /* Check whether we need to resize the cotable */
517 needed_size = (vcotbl->seen_entries + 1) * co_info[vcotbl->type].size;
518 while (needed_size > new_size)
519 new_size *= 2;
520
521 if (likely(new_size <= res->backup_size)) {
522 if (vcotbl->scrubbed && !list_empty(&res->mob_head)) {
523 ret = vmw_cotable_unscrub(res);
524 if (ret)
525 return ret;
526 }
527 res->id = vcotbl->type;
528 return 0;
529 }
530
531 return vmw_cotable_resize(res, new_size);
532}
533
534/**
535 * vmw_hw_cotable_destroy - Cotable hw_destroy callback
536 *
537 * @res: Pointer to a cotable resource.
538 *
539 * The final (part of resource destruction) destroy callback.
540 */
541static void vmw_hw_cotable_destroy(struct vmw_resource *res)
542{
543 (void) vmw_cotable_destroy(res);
544}
545
546static size_t cotable_acc_size;
547
548/**
549 * vmw_cotable_free - Cotable resource destructor
550 *
551 * @res: Pointer to a cotable resource.
552 */
553static void vmw_cotable_free(struct vmw_resource *res)
554{
555 struct vmw_private *dev_priv = res->dev_priv;
556
557 kfree(res);
558 ttm_mem_global_free(vmw_mem_glob(dev_priv), cotable_acc_size);
559}
560
561/**
562 * vmw_cotable_alloc - Create a cotable resource
563 *
564 * @dev_priv: Pointer to a device private struct.
565 * @ctx: Pointer to the context resource.
566 * The cotable resource will not add a refcount.
567 * @type: The cotable type.
568 */
569struct vmw_resource *vmw_cotable_alloc(struct vmw_private *dev_priv,
570 struct vmw_resource *ctx,
571 u32 type)
572{
573 struct vmw_cotable *vcotbl;
574 int ret;
575 u32 num_entries;
576
577 if (unlikely(cotable_acc_size == 0))
578 cotable_acc_size = ttm_round_pot(sizeof(struct vmw_cotable));
579
580 ret = ttm_mem_global_alloc(vmw_mem_glob(dev_priv),
581 cotable_acc_size, false, true);
582 if (unlikely(ret))
583 return ERR_PTR(ret);
584
585 vcotbl = kzalloc(sizeof(*vcotbl), GFP_KERNEL);
586 if (unlikely(vcotbl == NULL)) {
587 ret = -ENOMEM;
588 goto out_no_alloc;
589 }
590
591 ret = vmw_resource_init(dev_priv, &vcotbl->res, true,
592 vmw_cotable_free, &vmw_cotable_func);
593 if (unlikely(ret != 0))
594 goto out_no_init;
595
596 INIT_LIST_HEAD(&vcotbl->resource_list);
597 vcotbl->res.id = type;
598 vcotbl->res.backup_size = PAGE_SIZE;
599 num_entries = PAGE_SIZE / co_info[type].size;
600 if (num_entries < co_info[type].min_initial_entries) {
601 vcotbl->res.backup_size = co_info[type].min_initial_entries *
602 co_info[type].size;
603 vcotbl->res.backup_size =
604 (vcotbl->res.backup_size + PAGE_SIZE - 1) & PAGE_MASK;
605 }
606
607 vcotbl->scrubbed = true;
608 vcotbl->seen_entries = -1;
609 vcotbl->type = type;
610 vcotbl->ctx = ctx;
611
612 vmw_resource_activate(&vcotbl->res, vmw_hw_cotable_destroy);
613
614 return &vcotbl->res;
615
616out_no_init:
617 kfree(vcotbl);
618out_no_alloc:
619 ttm_mem_global_free(vmw_mem_glob(dev_priv), cotable_acc_size);
620 return ERR_PTR(ret);
621}
622
623/**
624 * vmw_cotable_notify - Notify the cotable about an item creation
625 *
626 * @res: Pointer to a cotable resource.
627 * @id: Item id.
628 */
629int vmw_cotable_notify(struct vmw_resource *res, int id)
630{
631 struct vmw_cotable *vcotbl = vmw_cotable(res);
632
633 if (id < 0 || id >= SVGA_COTABLE_MAX_IDS) {
634 DRM_ERROR("Illegal COTable id. Type is %u. Id is %d\n",
635 (unsigned) vcotbl->type, id);
636 return -EINVAL;
637 }
638
639 if (vcotbl->seen_entries < id) {
640 /* Trigger a call to create() on next validate */
641 res->id = -1;
642 vcotbl->seen_entries = id;
643 }
644
645 return 0;
646}
647
648/**
649 * vmw_cotable_add_view - add a view to the cotable's list of active views.
650 *
651 * @res: pointer struct vmw_resource representing the cotable.
652 * @head: pointer to the struct list_head member of the resource, dedicated
653 * to the cotable active resource list.
654 */
655void vmw_cotable_add_resource(struct vmw_resource *res, struct list_head *head)
656{
657 struct vmw_cotable *vcotbl =
658 container_of(res, struct vmw_cotable, res);
659
660 list_add_tail(head, &vcotbl->resource_list);
661}
1// SPDX-License-Identifier: GPL-2.0 OR MIT
2/**************************************************************************
3 *
4 * Copyright 2014-2015 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 * Treat context OTables as resources to make use of the resource
29 * backing MOB eviction mechanism, that is used to read back the COTable
30 * whenever the backing MOB is evicted.
31 */
32
33#include <drm/ttm/ttm_placement.h>
34
35#include "vmwgfx_drv.h"
36#include "vmwgfx_resource_priv.h"
37#include "vmwgfx_so.h"
38
39/**
40 * struct vmw_cotable - Context Object Table resource
41 *
42 * @res: struct vmw_resource we are deriving from.
43 * @ctx: non-refcounted pointer to the owning context.
44 * @size_read_back: Size of data read back during eviction.
45 * @seen_entries: Seen entries in command stream for this cotable.
46 * @type: The cotable type.
47 * @scrubbed: Whether the cotable has been scrubbed.
48 * @resource_list: List of resources in the cotable.
49 */
50struct vmw_cotable {
51 struct vmw_resource res;
52 struct vmw_resource *ctx;
53 size_t size_read_back;
54 int seen_entries;
55 u32 type;
56 bool scrubbed;
57 struct list_head resource_list;
58};
59
60/**
61 * struct vmw_cotable_info - Static info about cotable types
62 *
63 * @min_initial_entries: Min number of initial intries at cotable allocation
64 * for this cotable type.
65 * @size: Size of each entry.
66 * @unbind_func: Unbind call-back function.
67 */
68struct vmw_cotable_info {
69 u32 min_initial_entries;
70 u32 size;
71 void (*unbind_func)(struct vmw_private *, struct list_head *,
72 bool);
73};
74
75static const struct vmw_cotable_info co_info[] = {
76 {1, sizeof(SVGACOTableDXRTViewEntry), &vmw_view_cotable_list_destroy},
77 {1, sizeof(SVGACOTableDXDSViewEntry), &vmw_view_cotable_list_destroy},
78 {1, sizeof(SVGACOTableDXSRViewEntry), &vmw_view_cotable_list_destroy},
79 {1, sizeof(SVGACOTableDXElementLayoutEntry), NULL},
80 {1, sizeof(SVGACOTableDXBlendStateEntry), NULL},
81 {1, sizeof(SVGACOTableDXDepthStencilEntry), NULL},
82 {1, sizeof(SVGACOTableDXRasterizerStateEntry), NULL},
83 {1, sizeof(SVGACOTableDXSamplerEntry), NULL},
84 {1, sizeof(SVGACOTableDXStreamOutputEntry), &vmw_dx_streamoutput_cotable_list_scrub},
85 {1, sizeof(SVGACOTableDXQueryEntry), NULL},
86 {1, sizeof(SVGACOTableDXShaderEntry), &vmw_dx_shader_cotable_list_scrub},
87 {1, sizeof(SVGACOTableDXUAViewEntry), &vmw_view_cotable_list_destroy}
88};
89
90/*
91 * Cotables with bindings that we remove must be scrubbed first,
92 * otherwise, the device will swap in an invalid context when we remove
93 * bindings before scrubbing a cotable...
94 */
95const SVGACOTableType vmw_cotable_scrub_order[] = {
96 SVGA_COTABLE_RTVIEW,
97 SVGA_COTABLE_DSVIEW,
98 SVGA_COTABLE_SRVIEW,
99 SVGA_COTABLE_DXSHADER,
100 SVGA_COTABLE_ELEMENTLAYOUT,
101 SVGA_COTABLE_BLENDSTATE,
102 SVGA_COTABLE_DEPTHSTENCIL,
103 SVGA_COTABLE_RASTERIZERSTATE,
104 SVGA_COTABLE_SAMPLER,
105 SVGA_COTABLE_STREAMOUTPUT,
106 SVGA_COTABLE_DXQUERY,
107 SVGA_COTABLE_UAVIEW,
108};
109
110static int vmw_cotable_bind(struct vmw_resource *res,
111 struct ttm_validate_buffer *val_buf);
112static int vmw_cotable_unbind(struct vmw_resource *res,
113 bool readback,
114 struct ttm_validate_buffer *val_buf);
115static int vmw_cotable_create(struct vmw_resource *res);
116static int vmw_cotable_destroy(struct vmw_resource *res);
117
118static const struct vmw_res_func vmw_cotable_func = {
119 .res_type = vmw_res_cotable,
120 .needs_backup = true,
121 .may_evict = true,
122 .prio = 3,
123 .dirty_prio = 3,
124 .type_name = "context guest backed object tables",
125 .backup_placement = &vmw_mob_placement,
126 .create = vmw_cotable_create,
127 .destroy = vmw_cotable_destroy,
128 .bind = vmw_cotable_bind,
129 .unbind = vmw_cotable_unbind,
130};
131
132/**
133 * vmw_cotable - Convert a struct vmw_resource pointer to a struct
134 * vmw_cotable pointer
135 *
136 * @res: Pointer to the resource.
137 */
138static struct vmw_cotable *vmw_cotable(struct vmw_resource *res)
139{
140 return container_of(res, struct vmw_cotable, res);
141}
142
143/**
144 * vmw_cotable_destroy - Cotable resource destroy callback
145 *
146 * @res: Pointer to the cotable resource.
147 *
148 * There is no device cotable destroy command, so this function only
149 * makes sure that the resource id is set to invalid.
150 */
151static int vmw_cotable_destroy(struct vmw_resource *res)
152{
153 res->id = -1;
154 return 0;
155}
156
157/**
158 * vmw_cotable_unscrub - Undo a cotable unscrub operation
159 *
160 * @res: Pointer to the cotable resource
161 *
162 * This function issues commands to (re)bind the cotable to
163 * its backing mob, which needs to be validated and reserved at this point.
164 * This is identical to bind() except the function interface looks different.
165 */
166static int vmw_cotable_unscrub(struct vmw_resource *res)
167{
168 struct vmw_cotable *vcotbl = vmw_cotable(res);
169 struct vmw_private *dev_priv = res->dev_priv;
170 struct ttm_buffer_object *bo = &res->backup->base;
171 struct {
172 SVGA3dCmdHeader header;
173 SVGA3dCmdDXSetCOTable body;
174 } *cmd;
175
176 WARN_ON_ONCE(bo->resource->mem_type != VMW_PL_MOB);
177 dma_resv_assert_held(bo->base.resv);
178
179 cmd = VMW_CMD_RESERVE(dev_priv, sizeof(*cmd));
180 if (!cmd)
181 return -ENOMEM;
182
183 WARN_ON(vcotbl->ctx->id == SVGA3D_INVALID_ID);
184 WARN_ON(bo->resource->mem_type != VMW_PL_MOB);
185 cmd->header.id = SVGA_3D_CMD_DX_SET_COTABLE;
186 cmd->header.size = sizeof(cmd->body);
187 cmd->body.cid = vcotbl->ctx->id;
188 cmd->body.type = vcotbl->type;
189 cmd->body.mobid = bo->resource->start;
190 cmd->body.validSizeInBytes = vcotbl->size_read_back;
191
192 vmw_cmd_commit_flush(dev_priv, sizeof(*cmd));
193 vcotbl->scrubbed = false;
194
195 return 0;
196}
197
198/**
199 * vmw_cotable_bind - Undo a cotable unscrub operation
200 *
201 * @res: Pointer to the cotable resource
202 * @val_buf: Pointer to a struct ttm_validate_buffer prepared by the caller
203 * for convenience / fencing.
204 *
205 * This function issues commands to (re)bind the cotable to
206 * its backing mob, which needs to be validated and reserved at this point.
207 */
208static int vmw_cotable_bind(struct vmw_resource *res,
209 struct ttm_validate_buffer *val_buf)
210{
211 /*
212 * The create() callback may have changed @res->backup without
213 * the caller noticing, and with val_buf->bo still pointing to
214 * the old backup buffer. Although hackish, and not used currently,
215 * take the opportunity to correct the value here so that it's not
216 * misused in the future.
217 */
218 val_buf->bo = &res->backup->base;
219
220 return vmw_cotable_unscrub(res);
221}
222
223/**
224 * vmw_cotable_scrub - Scrub the cotable from the device.
225 *
226 * @res: Pointer to the cotable resource.
227 * @readback: Whether initiate a readback of the cotable data to the backup
228 * buffer.
229 *
230 * In some situations (context swapouts) it might be desirable to make the
231 * device forget about the cotable without performing a full unbind. A full
232 * unbind requires reserved backup buffers and it might not be possible to
233 * reserve them due to locking order violation issues. The vmw_cotable_scrub
234 * function implements a partial unbind() without that requirement but with the
235 * following restrictions.
236 * 1) Before the cotable is again used by the GPU, vmw_cotable_unscrub() must
237 * be called.
238 * 2) Before the cotable backing buffer is used by the CPU, or during the
239 * resource destruction, vmw_cotable_unbind() must be called.
240 */
241int vmw_cotable_scrub(struct vmw_resource *res, bool readback)
242{
243 struct vmw_cotable *vcotbl = vmw_cotable(res);
244 struct vmw_private *dev_priv = res->dev_priv;
245 size_t submit_size;
246
247 struct {
248 SVGA3dCmdHeader header;
249 SVGA3dCmdDXReadbackCOTable body;
250 } *cmd0;
251 struct {
252 SVGA3dCmdHeader header;
253 SVGA3dCmdDXSetCOTable body;
254 } *cmd1;
255
256 if (vcotbl->scrubbed)
257 return 0;
258
259 if (co_info[vcotbl->type].unbind_func)
260 co_info[vcotbl->type].unbind_func(dev_priv,
261 &vcotbl->resource_list,
262 readback);
263 submit_size = sizeof(*cmd1);
264 if (readback)
265 submit_size += sizeof(*cmd0);
266
267 cmd1 = VMW_CMD_RESERVE(dev_priv, submit_size);
268 if (!cmd1)
269 return -ENOMEM;
270
271 vcotbl->size_read_back = 0;
272 if (readback) {
273 cmd0 = (void *) cmd1;
274 cmd0->header.id = SVGA_3D_CMD_DX_READBACK_COTABLE;
275 cmd0->header.size = sizeof(cmd0->body);
276 cmd0->body.cid = vcotbl->ctx->id;
277 cmd0->body.type = vcotbl->type;
278 cmd1 = (void *) &cmd0[1];
279 vcotbl->size_read_back = res->backup_size;
280 }
281 cmd1->header.id = SVGA_3D_CMD_DX_SET_COTABLE;
282 cmd1->header.size = sizeof(cmd1->body);
283 cmd1->body.cid = vcotbl->ctx->id;
284 cmd1->body.type = vcotbl->type;
285 cmd1->body.mobid = SVGA3D_INVALID_ID;
286 cmd1->body.validSizeInBytes = 0;
287 vmw_cmd_commit_flush(dev_priv, submit_size);
288 vcotbl->scrubbed = true;
289
290 /* Trigger a create() on next validate. */
291 res->id = -1;
292
293 return 0;
294}
295
296/**
297 * vmw_cotable_unbind - Cotable resource unbind callback
298 *
299 * @res: Pointer to the cotable resource.
300 * @readback: Whether to read back cotable data to the backup buffer.
301 * @val_buf: Pointer to a struct ttm_validate_buffer prepared by the caller
302 * for convenience / fencing.
303 *
304 * Unbinds the cotable from the device and fences the backup buffer.
305 */
306static int vmw_cotable_unbind(struct vmw_resource *res,
307 bool readback,
308 struct ttm_validate_buffer *val_buf)
309{
310 struct vmw_cotable *vcotbl = vmw_cotable(res);
311 struct vmw_private *dev_priv = res->dev_priv;
312 struct ttm_buffer_object *bo = val_buf->bo;
313 struct vmw_fence_obj *fence;
314
315 if (!vmw_resource_mob_attached(res))
316 return 0;
317
318 WARN_ON_ONCE(bo->resource->mem_type != VMW_PL_MOB);
319 dma_resv_assert_held(bo->base.resv);
320
321 mutex_lock(&dev_priv->binding_mutex);
322 if (!vcotbl->scrubbed)
323 vmw_dx_context_scrub_cotables(vcotbl->ctx, readback);
324 mutex_unlock(&dev_priv->binding_mutex);
325 (void) vmw_execbuf_fence_commands(NULL, dev_priv, &fence, NULL);
326 vmw_bo_fence_single(bo, fence);
327 if (likely(fence != NULL))
328 vmw_fence_obj_unreference(&fence);
329
330 return 0;
331}
332
333/**
334 * vmw_cotable_readback - Read back a cotable without unbinding.
335 *
336 * @res: The cotable resource.
337 *
338 * Reads back a cotable to its backing mob without scrubbing the MOB from
339 * the cotable. The MOB is fenced for subsequent CPU access.
340 */
341static int vmw_cotable_readback(struct vmw_resource *res)
342{
343 struct vmw_cotable *vcotbl = vmw_cotable(res);
344 struct vmw_private *dev_priv = res->dev_priv;
345
346 struct {
347 SVGA3dCmdHeader header;
348 SVGA3dCmdDXReadbackCOTable body;
349 } *cmd;
350 struct vmw_fence_obj *fence;
351
352 if (!vcotbl->scrubbed) {
353 cmd = VMW_CMD_RESERVE(dev_priv, sizeof(*cmd));
354 if (!cmd)
355 return -ENOMEM;
356
357 cmd->header.id = SVGA_3D_CMD_DX_READBACK_COTABLE;
358 cmd->header.size = sizeof(cmd->body);
359 cmd->body.cid = vcotbl->ctx->id;
360 cmd->body.type = vcotbl->type;
361 vcotbl->size_read_back = res->backup_size;
362 vmw_cmd_commit(dev_priv, sizeof(*cmd));
363 }
364
365 (void) vmw_execbuf_fence_commands(NULL, dev_priv, &fence, NULL);
366 vmw_bo_fence_single(&res->backup->base, fence);
367 vmw_fence_obj_unreference(&fence);
368
369 return 0;
370}
371
372/**
373 * vmw_cotable_resize - Resize a cotable.
374 *
375 * @res: The cotable resource.
376 * @new_size: The new size.
377 *
378 * Resizes a cotable and binds the new backup buffer.
379 * On failure the cotable is left intact.
380 * Important! This function may not fail once the MOB switch has been
381 * committed to hardware. That would put the device context in an
382 * invalid state which we can't currently recover from.
383 */
384static int vmw_cotable_resize(struct vmw_resource *res, size_t new_size)
385{
386 struct ttm_operation_ctx ctx = { false, false };
387 struct vmw_private *dev_priv = res->dev_priv;
388 struct vmw_cotable *vcotbl = vmw_cotable(res);
389 struct vmw_buffer_object *buf, *old_buf = res->backup;
390 struct ttm_buffer_object *bo, *old_bo = &res->backup->base;
391 size_t old_size = res->backup_size;
392 size_t old_size_read_back = vcotbl->size_read_back;
393 size_t cur_size_read_back;
394 struct ttm_bo_kmap_obj old_map, new_map;
395 int ret;
396 size_t i;
397
398 ret = vmw_cotable_readback(res);
399 if (ret)
400 return ret;
401
402 cur_size_read_back = vcotbl->size_read_back;
403 vcotbl->size_read_back = old_size_read_back;
404
405 /*
406 * While device is processing, Allocate and reserve a buffer object
407 * for the new COTable. Initially pin the buffer object to make sure
408 * we can use tryreserve without failure.
409 */
410 buf = kzalloc(sizeof(*buf), GFP_KERNEL);
411 if (!buf)
412 return -ENOMEM;
413
414 ret = vmw_bo_init(dev_priv, buf, new_size, &vmw_mob_placement,
415 true, true, vmw_bo_bo_free);
416 if (ret) {
417 DRM_ERROR("Failed initializing new cotable MOB.\n");
418 return ret;
419 }
420
421 bo = &buf->base;
422 WARN_ON_ONCE(ttm_bo_reserve(bo, false, true, NULL));
423
424 ret = ttm_bo_wait(old_bo, false, false);
425 if (unlikely(ret != 0)) {
426 DRM_ERROR("Failed waiting for cotable unbind.\n");
427 goto out_wait;
428 }
429
430 /*
431 * Do a page by page copy of COTables. This eliminates slow vmap()s.
432 * This should really be a TTM utility.
433 */
434 for (i = 0; i < old_bo->resource->num_pages; ++i) {
435 bool dummy;
436
437 ret = ttm_bo_kmap(old_bo, i, 1, &old_map);
438 if (unlikely(ret != 0)) {
439 DRM_ERROR("Failed mapping old COTable on resize.\n");
440 goto out_wait;
441 }
442 ret = ttm_bo_kmap(bo, i, 1, &new_map);
443 if (unlikely(ret != 0)) {
444 DRM_ERROR("Failed mapping new COTable on resize.\n");
445 goto out_map_new;
446 }
447 memcpy(ttm_kmap_obj_virtual(&new_map, &dummy),
448 ttm_kmap_obj_virtual(&old_map, &dummy),
449 PAGE_SIZE);
450 ttm_bo_kunmap(&new_map);
451 ttm_bo_kunmap(&old_map);
452 }
453
454 /* Unpin new buffer, and switch backup buffers. */
455 ret = ttm_bo_validate(bo, &vmw_mob_placement, &ctx);
456 if (unlikely(ret != 0)) {
457 DRM_ERROR("Failed validating new COTable backup buffer.\n");
458 goto out_wait;
459 }
460
461 vmw_resource_mob_detach(res);
462 res->backup = buf;
463 res->backup_size = new_size;
464 vcotbl->size_read_back = cur_size_read_back;
465
466 /*
467 * Now tell the device to switch. If this fails, then we need to
468 * revert the full resize.
469 */
470 ret = vmw_cotable_unscrub(res);
471 if (ret) {
472 DRM_ERROR("Failed switching COTable backup buffer.\n");
473 res->backup = old_buf;
474 res->backup_size = old_size;
475 vcotbl->size_read_back = old_size_read_back;
476 vmw_resource_mob_attach(res);
477 goto out_wait;
478 }
479
480 vmw_resource_mob_attach(res);
481 /* Let go of the old mob. */
482 vmw_bo_unreference(&old_buf);
483 res->id = vcotbl->type;
484
485 /* Release the pin acquired in vmw_bo_init */
486 ttm_bo_unpin(bo);
487
488 return 0;
489
490out_map_new:
491 ttm_bo_kunmap(&old_map);
492out_wait:
493 ttm_bo_unpin(bo);
494 ttm_bo_unreserve(bo);
495 vmw_bo_unreference(&buf);
496
497 return ret;
498}
499
500/**
501 * vmw_cotable_create - Cotable resource create callback
502 *
503 * @res: Pointer to a cotable resource.
504 *
505 * There is no separate create command for cotables, so this callback, which
506 * is called before bind() in the validation sequence is instead used for two
507 * things.
508 * 1) Unscrub the cotable if it is scrubbed and still attached to a backup
509 * buffer.
510 * 2) Resize the cotable if needed.
511 */
512static int vmw_cotable_create(struct vmw_resource *res)
513{
514 struct vmw_cotable *vcotbl = vmw_cotable(res);
515 size_t new_size = res->backup_size;
516 size_t needed_size;
517 int ret;
518
519 /* Check whether we need to resize the cotable */
520 needed_size = (vcotbl->seen_entries + 1) * co_info[vcotbl->type].size;
521 while (needed_size > new_size)
522 new_size *= 2;
523
524 if (likely(new_size <= res->backup_size)) {
525 if (vcotbl->scrubbed && vmw_resource_mob_attached(res)) {
526 ret = vmw_cotable_unscrub(res);
527 if (ret)
528 return ret;
529 }
530 res->id = vcotbl->type;
531 return 0;
532 }
533
534 return vmw_cotable_resize(res, new_size);
535}
536
537/**
538 * vmw_hw_cotable_destroy - Cotable hw_destroy callback
539 *
540 * @res: Pointer to a cotable resource.
541 *
542 * The final (part of resource destruction) destroy callback.
543 */
544static void vmw_hw_cotable_destroy(struct vmw_resource *res)
545{
546 (void) vmw_cotable_destroy(res);
547}
548
549static size_t cotable_acc_size;
550
551/**
552 * vmw_cotable_free - Cotable resource destructor
553 *
554 * @res: Pointer to a cotable resource.
555 */
556static void vmw_cotable_free(struct vmw_resource *res)
557{
558 struct vmw_private *dev_priv = res->dev_priv;
559
560 kfree(res);
561 ttm_mem_global_free(vmw_mem_glob(dev_priv), cotable_acc_size);
562}
563
564/**
565 * vmw_cotable_alloc - Create a cotable resource
566 *
567 * @dev_priv: Pointer to a device private struct.
568 * @ctx: Pointer to the context resource.
569 * The cotable resource will not add a refcount.
570 * @type: The cotable type.
571 */
572struct vmw_resource *vmw_cotable_alloc(struct vmw_private *dev_priv,
573 struct vmw_resource *ctx,
574 u32 type)
575{
576 struct vmw_cotable *vcotbl;
577 struct ttm_operation_ctx ttm_opt_ctx = {
578 .interruptible = true,
579 .no_wait_gpu = false
580 };
581 int ret;
582 u32 num_entries;
583
584 if (unlikely(cotable_acc_size == 0))
585 cotable_acc_size = ttm_round_pot(sizeof(struct vmw_cotable));
586
587 ret = ttm_mem_global_alloc(vmw_mem_glob(dev_priv),
588 cotable_acc_size, &ttm_opt_ctx);
589 if (unlikely(ret))
590 return ERR_PTR(ret);
591
592 vcotbl = kzalloc(sizeof(*vcotbl), GFP_KERNEL);
593 if (unlikely(!vcotbl)) {
594 ret = -ENOMEM;
595 goto out_no_alloc;
596 }
597
598 ret = vmw_resource_init(dev_priv, &vcotbl->res, true,
599 vmw_cotable_free, &vmw_cotable_func);
600 if (unlikely(ret != 0))
601 goto out_no_init;
602
603 INIT_LIST_HEAD(&vcotbl->resource_list);
604 vcotbl->res.id = type;
605 vcotbl->res.backup_size = PAGE_SIZE;
606 num_entries = PAGE_SIZE / co_info[type].size;
607 if (num_entries < co_info[type].min_initial_entries) {
608 vcotbl->res.backup_size = co_info[type].min_initial_entries *
609 co_info[type].size;
610 vcotbl->res.backup_size =
611 (vcotbl->res.backup_size + PAGE_SIZE - 1) & PAGE_MASK;
612 }
613
614 vcotbl->scrubbed = true;
615 vcotbl->seen_entries = -1;
616 vcotbl->type = type;
617 vcotbl->ctx = ctx;
618
619 vcotbl->res.hw_destroy = vmw_hw_cotable_destroy;
620
621 return &vcotbl->res;
622
623out_no_init:
624 kfree(vcotbl);
625out_no_alloc:
626 ttm_mem_global_free(vmw_mem_glob(dev_priv), cotable_acc_size);
627 return ERR_PTR(ret);
628}
629
630/**
631 * vmw_cotable_notify - Notify the cotable about an item creation
632 *
633 * @res: Pointer to a cotable resource.
634 * @id: Item id.
635 */
636int vmw_cotable_notify(struct vmw_resource *res, int id)
637{
638 struct vmw_cotable *vcotbl = vmw_cotable(res);
639
640 if (id < 0 || id >= SVGA_COTABLE_MAX_IDS) {
641 DRM_ERROR("Illegal COTable id. Type is %u. Id is %d\n",
642 (unsigned) vcotbl->type, id);
643 return -EINVAL;
644 }
645
646 if (vcotbl->seen_entries < id) {
647 /* Trigger a call to create() on next validate */
648 res->id = -1;
649 vcotbl->seen_entries = id;
650 }
651
652 return 0;
653}
654
655/**
656 * vmw_cotable_add_resource - add a view to the cotable's list of active views.
657 *
658 * @res: pointer struct vmw_resource representing the cotable.
659 * @head: pointer to the struct list_head member of the resource, dedicated
660 * to the cotable active resource list.
661 */
662void vmw_cotable_add_resource(struct vmw_resource *res, struct list_head *head)
663{
664 struct vmw_cotable *vcotbl =
665 container_of(res, struct vmw_cotable, res);
666
667 list_add_tail(head, &vcotbl->resource_list);
668}