WebSVN – Kolibri OS – Blame – /drivers/video/drm/vmwgfx/vmwgfx_execbuf.c

Rev	Author	Line No.	Line
4075	Serge	1	/**************************************************************************
		2	*
		3	* Copyright © 2009 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_reg.h"
		30	#include
		31	#include
		32
		33	#define VMW_RES_HT_ORDER 12
		34
		35	/**
		36	* struct vmw_resource_relocation - Relocation info for resources
		37	*
		38	* @head: List head for the software context's relocation list.
		39	* @res: Non-ref-counted pointer to the resource.
		40	* @offset: Offset of 4 byte entries into the command buffer where the
		41	* id that needs fixup is located.
		42	*/
		43	struct vmw_resource_relocation {
		44	struct list_head head;
		45	const struct vmw_resource *res;
		46	unsigned long offset;
		47	};
		48
		49	/**
		50	* struct vmw_resource_val_node - Validation info for resources
		51	*
		52	* @head: List head for the software context's resource list.
		53	* @hash: Hash entry for quick resouce to val_node lookup.
		54	* @res: Ref-counted pointer to the resource.
		55	* @switch_backup: Boolean whether to switch backup buffer on unreserve.
		56	* @new_backup: Refcounted pointer to the new backup buffer.
		57	* @new_backup_offset: New backup buffer offset if @new_backup is non-NUll.
		58	* @first_usage: Set to true the first time the resource is referenced in
		59	* the command stream.
		60	* @no_buffer_needed: Resources do not need to allocate buffer backup on
		61	* reservation. The command stream will provide one.
		62	*/
		63	struct vmw_resource_val_node {
		64	struct list_head head;
		65	struct drm_hash_item hash;
		66	struct vmw_resource *res;
		67	struct vmw_dma_buffer *new_backup;
		68	unsigned long new_backup_offset;
		69	bool first_usage;
		70	bool no_buffer_needed;
		71	};
		72
		73	/**
		74	* vmw_resource_unreserve - unreserve resources previously reserved for
		75	* command submission.
		76	*
		77	* @list_head: list of resources to unreserve.
		78	* @backoff: Whether command submission failed.
		79	*/
		80	static void vmw_resource_list_unreserve(struct list_head *list,
		81	bool backoff)
		82	{
		83	struct vmw_resource_val_node *val;
		84
		85	list_for_each_entry(val, list, head) {
		86	struct vmw_resource *res = val->res;
		87	struct vmw_dma_buffer *new_backup =
		88	backoff ? NULL : val->new_backup;
		89
		90	vmw_resource_unreserve(res, new_backup,
		91	val->new_backup_offset);
		92	vmw_dmabuf_unreference(&val->new_backup);
		93	}
		94	}
		95
		96
		97	/**
		98	* vmw_resource_val_add - Add a resource to the software context's
		99	* resource list if it's not already on it.
		100	*
		101	* @sw_context: Pointer to the software context.
		102	* @res: Pointer to the resource.
		103	* @p_node On successful return points to a valid pointer to a
		104	* struct vmw_resource_val_node, if non-NULL on entry.
		105	*/
		106	static int vmw_resource_val_add(struct vmw_sw_context *sw_context,
		107	struct vmw_resource *res,
		108	struct vmw_resource_val_node **p_node)
		109	{
		110	struct vmw_resource_val_node *node;
		111	struct drm_hash_item *hash;
		112	int ret;
		113
		114	if (likely(drm_ht_find_item(&sw_context->res_ht, (unsigned long) res,
		115	&hash) == 0)) {
		116	node = container_of(hash, struct vmw_resource_val_node, hash);
		117	node->first_usage = false;
		118	if (unlikely(p_node != NULL))
		119	*p_node = node;
		120	return 0;
		121	}
		122
		123	node = kzalloc(sizeof(*node), GFP_KERNEL);
		124	if (unlikely(node == NULL)) {
		125	DRM_ERROR("Failed to allocate a resource validation "
		126	"entry.\n");
		127	return -ENOMEM;
		128	}
		129
		130	node->hash.key = (unsigned long) res;
		131	ret = drm_ht_insert_item(&sw_context->res_ht, &node->hash);
		132	if (unlikely(ret != 0)) {
		133	DRM_ERROR("Failed to initialize a resource validation "
		134	"entry.\n");
		135	kfree(node);
		136	return ret;
		137	}
		138	list_add_tail(&node->head, &sw_context->resource_list);
		139	node->res = vmw_resource_reference(res);
		140	node->first_usage = true;
		141
		142	if (unlikely(p_node != NULL))
		143	*p_node = node;
		144
		145	return 0;
		146	}
		147
		148	/**
		149	* vmw_resource_relocation_add - Add a relocation to the relocation list
		150	*
		151	* @list: Pointer to head of relocation list.
		152	* @res: The resource.
		153	* @offset: Offset into the command buffer currently being parsed where the
		154	* id that needs fixup is located. Granularity is 4 bytes.
		155	*/
		156	static int vmw_resource_relocation_add(struct list_head *list,
		157	const struct vmw_resource *res,
		158	unsigned long offset)
		159	{
		160	struct vmw_resource_relocation *rel;
		161
		162	rel = kmalloc(sizeof(*rel), GFP_KERNEL);
		163	if (unlikely(rel == NULL)) {
		164	DRM_ERROR("Failed to allocate a resource relocation.\n");
		165	return -ENOMEM;
		166	}
		167
		168	rel->res = res;
		169	rel->offset = offset;
		170	list_add_tail(&rel->head, list);
		171
		172	return 0;
		173	}
		174
		175	/**
		176	* vmw_resource_relocations_free - Free all relocations on a list
		177	*
		178	* @list: Pointer to the head of the relocation list.
		179	*/
		180	static void vmw_resource_relocations_free(struct list_head *list)
		181	{
		182	struct vmw_resource_relocation rel, n;
		183
		184	list_for_each_entry_safe(rel, n, list, head) {
		185	list_del(&rel->head);
		186	kfree(rel);
		187	}
		188	}
		189
		190	/**
		191	* vmw_resource_relocations_apply - Apply all relocations on a list
		192	*
		193	* @cb: Pointer to the start of the command buffer bein patch. This need
		194	* not be the same buffer as the one being parsed when the relocation
		195	* list was built, but the contents must be the same modulo the
		196	* resource ids.
		197	* @list: Pointer to the head of the relocation list.
		198	*/
		199	static void vmw_resource_relocations_apply(uint32_t *cb,
		200	struct list_head *list)
		201	{
		202	struct vmw_resource_relocation *rel;
		203
		204	list_for_each_entry(rel, list, head)
		205	cb[rel->offset] = rel->res->id;
		206	}
		207
		208	static int vmw_cmd_invalid(struct vmw_private *dev_priv,
		209	struct vmw_sw_context *sw_context,
		210	SVGA3dCmdHeader *header)
		211	{
		212	return 0; //capable(CAP_SYS_ADMIN) ? : -EINVAL;
		213	}
		214
		215	static int vmw_cmd_ok(struct vmw_private *dev_priv,
		216	struct vmw_sw_context *sw_context,
		217	SVGA3dCmdHeader *header)
		218	{
		219	return 0;
		220	}
		221
		222	/**
		223	* vmw_bo_to_validate_list - add a bo to a validate list
		224	*
		225	* @sw_context: The software context used for this command submission batch.
		226	* @bo: The buffer object to add.
		227	* @p_val_node: If non-NULL Will be updated with the validate node number
		228	* on return.
		229	*
		230	* Returns -EINVAL if the limit of number of buffer objects per command
		231	* submission is reached.
		232	*/
		233	static int vmw_bo_to_validate_list(struct vmw_sw_context *sw_context,
		234	struct ttm_buffer_object *bo,
		235	uint32_t *p_val_node)
		236	{
		237	uint32_t val_node;
		238	struct vmw_validate_buffer *vval_buf;
		239	struct ttm_validate_buffer *val_buf;
		240	struct drm_hash_item *hash;
		241	int ret;
		242
		243	if (likely(drm_ht_find_item(&sw_context->res_ht, (unsigned long) bo,
		244	&hash) == 0)) {
		245	vval_buf = container_of(hash, struct vmw_validate_buffer,
		246	hash);
		247	val_buf = &vval_buf->base;
		248	val_node = vval_buf - sw_context->val_bufs;
		249	} else {
		250	val_node = sw_context->cur_val_buf;
		251	if (unlikely(val_node >= VMWGFX_MAX_VALIDATIONS)) {
		252	DRM_ERROR("Max number of DMA buffers per submission "
		253	"exceeded.\n");
		254	return -EINVAL;
		255	}
		256	vval_buf = &sw_context->val_bufs[val_node];
		257	vval_buf->hash.key = (unsigned long) bo;
		258	ret = drm_ht_insert_item(&sw_context->res_ht, &vval_buf->hash);
		259	if (unlikely(ret != 0)) {
		260	DRM_ERROR("Failed to initialize a buffer validation "
		261	"entry.\n");
		262	return ret;
		263	}
		264	++sw_context->cur_val_buf;
		265	val_buf = &vval_buf->base;
		266	val_buf->bo = ttm_bo_reference(bo);
		267	val_buf->reserved = false;
		268	list_add_tail(&val_buf->head, &sw_context->validate_nodes);
		269	}
		270
		271	sw_context->fence_flags \|= DRM_VMW_FENCE_FLAG_EXEC;
		272
		273	if (p_val_node)
		274	*p_val_node = val_node;
		275
		276	return 0;
		277	}
		278
		279	/**
		280	* vmw_resources_reserve - Reserve all resources on the sw_context's
		281	* resource list.
		282	*
		283	* @sw_context: Pointer to the software context.
		284	*
		285	* Note that since vmware's command submission currently is protected by
		286	* the cmdbuf mutex, no fancy deadlock avoidance is required for resources,
		287	* since only a single thread at once will attempt this.
		288	*/
		289	static int vmw_resources_reserve(struct vmw_sw_context *sw_context)
		290	{
		291	struct vmw_resource_val_node *val;
		292	int ret;
		293
		294	list_for_each_entry(val, &sw_context->resource_list, head) {
		295	struct vmw_resource *res = val->res;
		296
		297	ret = vmw_resource_reserve(res, val->no_buffer_needed);
		298	if (unlikely(ret != 0))
		299	return ret;
		300
		301	if (res->backup) {
		302	struct ttm_buffer_object *bo = &res->backup->base;
		303
		304	ret = vmw_bo_to_validate_list
		305	(sw_context, bo, NULL);
		306
		307	if (unlikely(ret != 0))
		308	return ret;
		309	}
		310	}
		311	return 0;
		312	}
		313
		314	/**
		315	* vmw_resources_validate - Validate all resources on the sw_context's
		316	* resource list.
		317	*
		318	* @sw_context: Pointer to the software context.
		319	*
		320	* Before this function is called, all resource backup buffers must have
		321	* been validated.
		322	*/
		323	static int vmw_resources_validate(struct vmw_sw_context *sw_context)
		324	{
		325	struct vmw_resource_val_node *val;
		326	int ret;
		327
		328	list_for_each_entry(val, &sw_context->resource_list, head) {
		329	struct vmw_resource *res = val->res;
		330
		331	ret = vmw_resource_validate(res);
		332	if (unlikely(ret != 0)) {
		333	if (ret != -ERESTARTSYS)
		334	DRM_ERROR("Failed to validate resource.\n");
		335	return ret;
		336	}
		337	}
		338	return 0;
		339	}
		340
		341	/**
		342	* vmw_cmd_res_check - Check that a resource is present and if so, put it
		343	* on the resource validate list unless it's already there.
		344	*
		345	* @dev_priv: Pointer to a device private structure.
		346	* @sw_context: Pointer to the software context.
		347	* @res_type: Resource type.
		348	* @converter: User-space visisble type specific information.
		349	* @id: Pointer to the location in the command buffer currently being
		350	* parsed from where the user-space resource id handle is located.
		351	*/
		352	static int vmw_cmd_res_check(struct vmw_private *dev_priv,
		353	struct vmw_sw_context *sw_context,
		354	enum vmw_res_type res_type,
		355	const struct vmw_user_resource_conv *converter,
		356	uint32_t *id,
		357	struct vmw_resource_val_node **p_val)
		358	{
		359	struct vmw_res_cache_entry *rcache =
		360	&sw_context->res_cache[res_type];
		361	struct vmw_resource *res;
		362	struct vmw_resource_val_node *node;
		363	int ret;
		364
		365	if (*id == SVGA3D_INVALID_ID)
		366	return 0;
		367
		368	/*
		369	* Fastpath in case of repeated commands referencing the same
		370	* resource
		371	*/
		372
		373	if (likely(rcache->valid && *id == rcache->handle)) {
		374	const struct vmw_resource *res = rcache->res;
		375
		376	rcache->node->first_usage = false;
		377	if (p_val)
		378	*p_val = rcache->node;
		379
		380	return vmw_resource_relocation_add
		381	(&sw_context->res_relocations, res,
		382	id - sw_context->buf_start);
		383	}
		384
		385	ret = vmw_user_resource_lookup_handle(dev_priv,
		386	sw_context->tfile,
		387	*id,
		388	converter,
		389	&res);
		390	if (unlikely(ret != 0)) {
		391	DRM_ERROR("Could not find or use resource 0x%08x.\n",
		392	(unsigned) *id);
		393	// dump_stack();
		394	return ret;
		395	}
		396
		397	rcache->valid = true;
		398	rcache->res = res;
		399	rcache->handle = *id;
		400
		401	ret = vmw_resource_relocation_add(&sw_context->res_relocations,
		402	res,
		403	id - sw_context->buf_start);
		404	if (unlikely(ret != 0))
		405	goto out_no_reloc;
		406
		407	ret = vmw_resource_val_add(sw_context, res, &node);
		408	if (unlikely(ret != 0))
		409	goto out_no_reloc;
		410
		411	rcache->node = node;
		412	if (p_val)
		413	*p_val = node;
		414	vmw_resource_unreference(&res);
		415	return 0;
		416
		417	out_no_reloc:
		418	BUG_ON(sw_context->error_resource != NULL);
		419	sw_context->error_resource = res;
		420
		421	return ret;
		422	}
		423
		424	/**
		425	* vmw_cmd_cid_check - Check a command header for valid context information.
		426	*
		427	* @dev_priv: Pointer to a device private structure.
		428	* @sw_context: Pointer to the software context.
		429	* @header: A command header with an embedded user-space context handle.
		430	*
		431	* Convenience function: Call vmw_cmd_res_check with the user-space context
		432	* handle embedded in @header.
		433	*/
		434	static int vmw_cmd_cid_check(struct vmw_private *dev_priv,
		435	struct vmw_sw_context *sw_context,
		436	SVGA3dCmdHeader *header)
		437	{
		438	struct vmw_cid_cmd {
		439	SVGA3dCmdHeader header;
		440	__le32 cid;
		441	} *cmd;
		442
		443	cmd = container_of(header, struct vmw_cid_cmd, header);
		444	return vmw_cmd_res_check(dev_priv, sw_context, vmw_res_context,
		445	user_context_converter, &cmd->cid, NULL);
		446	}
		447
		448	static int vmw_cmd_set_render_target_check(struct vmw_private *dev_priv,
		449	struct vmw_sw_context *sw_context,
		450	SVGA3dCmdHeader *header)
		451	{
		452	struct vmw_sid_cmd {
		453	SVGA3dCmdHeader header;
		454	SVGA3dCmdSetRenderTarget body;
		455	} *cmd;
		456	int ret;
		457
		458	ret = vmw_cmd_cid_check(dev_priv, sw_context, header);
		459	if (unlikely(ret != 0))
		460	return ret;
		461
		462	cmd = container_of(header, struct vmw_sid_cmd, header);
		463	ret = vmw_cmd_res_check(dev_priv, sw_context, vmw_res_surface,
		464	user_surface_converter,
		465	&cmd->body.target.sid, NULL);
		466	return ret;
		467	}
		468
		469	static int vmw_cmd_surface_copy_check(struct vmw_private *dev_priv,
		470	struct vmw_sw_context *sw_context,
		471	SVGA3dCmdHeader *header)
		472	{
		473	struct vmw_sid_cmd {
		474	SVGA3dCmdHeader header;
		475	SVGA3dCmdSurfaceCopy body;
		476	} *cmd;
		477	int ret;
		478
		479	cmd = container_of(header, struct vmw_sid_cmd, header);
		480	ret = vmw_cmd_res_check(dev_priv, sw_context, vmw_res_surface,
		481	user_surface_converter,
		482	&cmd->body.src.sid, NULL);
		483	if (unlikely(ret != 0))
		484	return ret;
		485	return vmw_cmd_res_check(dev_priv, sw_context, vmw_res_surface,
		486	user_surface_converter,
		487	&cmd->body.dest.sid, NULL);
		488	}
		489
		490	static int vmw_cmd_stretch_blt_check(struct vmw_private *dev_priv,
		491	struct vmw_sw_context *sw_context,
		492	SVGA3dCmdHeader *header)
		493	{
		494	struct vmw_sid_cmd {
		495	SVGA3dCmdHeader header;
		496	SVGA3dCmdSurfaceStretchBlt body;
		497	} *cmd;
		498	int ret;
		499
		500	cmd = container_of(header, struct vmw_sid_cmd, header);
		501	ret = vmw_cmd_res_check(dev_priv, sw_context, vmw_res_surface,
		502	user_surface_converter,
		503	&cmd->body.src.sid, NULL);
		504	if (unlikely(ret != 0))
		505	return ret;
		506	return vmw_cmd_res_check(dev_priv, sw_context, vmw_res_surface,
		507	user_surface_converter,
		508	&cmd->body.dest.sid, NULL);
		509	}
		510
		511	static int vmw_cmd_blt_surf_screen_check(struct vmw_private *dev_priv,
		512	struct vmw_sw_context *sw_context,
		513	SVGA3dCmdHeader *header)
		514	{
		515	struct vmw_sid_cmd {
		516	SVGA3dCmdHeader header;
		517	SVGA3dCmdBlitSurfaceToScreen body;
		518	} *cmd;
		519
		520	cmd = container_of(header, struct vmw_sid_cmd, header);
		521
		522	if (unlikely(!sw_context->kernel)) {
		523	DRM_ERROR("Kernel only SVGA3d command: %u.\n", cmd->header.id);
		524	return -EPERM;
		525	}
		526
		527	return vmw_cmd_res_check(dev_priv, sw_context, vmw_res_surface,
		528	user_surface_converter,
		529	&cmd->body.srcImage.sid, NULL);
		530	}
		531
		532	static int vmw_cmd_present_check(struct vmw_private *dev_priv,
		533	struct vmw_sw_context *sw_context,
		534	SVGA3dCmdHeader *header)
		535	{
		536	struct vmw_sid_cmd {
		537	SVGA3dCmdHeader header;
		538	SVGA3dCmdPresent body;
		539	} *cmd;
		540
		541
		542	cmd = container_of(header, struct vmw_sid_cmd, header);
		543
		544	if (unlikely(!sw_context->kernel)) {
		545	DRM_ERROR("Kernel only SVGA3d command: %u.\n", cmd->header.id);
		546	return -EPERM;
		547	}
		548
		549	return vmw_cmd_res_check(dev_priv, sw_context, vmw_res_surface,
		550	user_surface_converter, &cmd->body.sid,
		551	NULL);
		552	}
		553
		554	/**
		555	* vmw_query_bo_switch_prepare - Prepare to switch pinned buffer for queries.
		556	*
		557	* @dev_priv: The device private structure.
		558	* @new_query_bo: The new buffer holding query results.
		559	* @sw_context: The software context used for this command submission.
		560	*
		561	* This function checks whether @new_query_bo is suitable for holding
		562	* query results, and if another buffer currently is pinned for query
		563	* results. If so, the function prepares the state of @sw_context for
		564	* switching pinned buffers after successful submission of the current
		565	* command batch.
		566	*/
		567	static int vmw_query_bo_switch_prepare(struct vmw_private *dev_priv,
		568	struct ttm_buffer_object *new_query_bo,
		569	struct vmw_sw_context *sw_context)
		570	{
		571	struct vmw_res_cache_entry *ctx_entry =
		572	&sw_context->res_cache[vmw_res_context];
		573	int ret;
		574
		575	BUG_ON(!ctx_entry->valid);
		576	sw_context->last_query_ctx = ctx_entry->res;
		577
		578	if (unlikely(new_query_bo != sw_context->cur_query_bo)) {
		579
		580	if (unlikely(new_query_bo->num_pages > 4)) {
		581	DRM_ERROR("Query buffer too large.\n");
		582	return -EINVAL;
		583	}
		584
		585	if (unlikely(sw_context->cur_query_bo != NULL)) {
		586	sw_context->needs_post_query_barrier = true;
		587	ret = vmw_bo_to_validate_list(sw_context,
		588	sw_context->cur_query_bo,
		589	NULL);
		590	if (unlikely(ret != 0))
		591	return ret;
		592	}
		593	sw_context->cur_query_bo = new_query_bo;
		594
		595	ret = vmw_bo_to_validate_list(sw_context,
		596	dev_priv->dummy_query_bo,
		597	NULL);
		598	if (unlikely(ret != 0))
		599	return ret;
		600
		601	}
		602
		603	return 0;
		604	}
		605
		606
		607	/**
		608	* vmw_query_bo_switch_commit - Finalize switching pinned query buffer
		609	*
		610	* @dev_priv: The device private structure.
		611	* @sw_context: The software context used for this command submission batch.
		612	*
		613	* This function will check if we're switching query buffers, and will then,
		614	* issue a dummy occlusion query wait used as a query barrier. When the fence
		615	* object following that query wait has signaled, we are sure that all
		616	* preceding queries have finished, and the old query buffer can be unpinned.
		617	* However, since both the new query buffer and the old one are fenced with
		618	* that fence, we can do an asynchronus unpin now, and be sure that the
		619	* old query buffer won't be moved until the fence has signaled.
		620	*
		621	* As mentioned above, both the new - and old query buffers need to be fenced
		622	* using a sequence emitted after calling this function.
		623	*/
		624	static void vmw_query_bo_switch_commit(struct vmw_private *dev_priv,
		625	struct vmw_sw_context *sw_context)
		626	{
		627	/*
		628	* The validate list should still hold references to all
		629	* contexts here.
		630	*/
		631
		632	if (sw_context->needs_post_query_barrier) {
		633	struct vmw_res_cache_entry *ctx_entry =
		634	&sw_context->res_cache[vmw_res_context];
		635	struct vmw_resource *ctx;
		636	int ret;
		637
		638	BUG_ON(!ctx_entry->valid);
		639	ctx = ctx_entry->res;
		640
		641	ret = vmw_fifo_emit_dummy_query(dev_priv, ctx->id);
		642
		643	if (unlikely(ret != 0))
		644	DRM_ERROR("Out of fifo space for dummy query.\n");
		645	}
		646
		647	if (dev_priv->pinned_bo != sw_context->cur_query_bo) {
		648	if (dev_priv->pinned_bo) {
		649	vmw_bo_pin(dev_priv->pinned_bo, false);
		650	ttm_bo_unref(&dev_priv->pinned_bo);
		651	}
		652
		653	if (!sw_context->needs_post_query_barrier) {
		654	vmw_bo_pin(sw_context->cur_query_bo, true);
		655
		656	/*
		657	* We pin also the dummy_query_bo buffer so that we
		658	* don't need to validate it when emitting
		659	* dummy queries in context destroy paths.
		660	*/
		661
		662	vmw_bo_pin(dev_priv->dummy_query_bo, true);
		663	dev_priv->dummy_query_bo_pinned = true;
		664
		665	BUG_ON(sw_context->last_query_ctx == NULL);
		666	dev_priv->query_cid = sw_context->last_query_ctx->id;
		667	dev_priv->query_cid_valid = true;
		668	dev_priv->pinned_bo =
		669	ttm_bo_reference(sw_context->cur_query_bo);
		670	}
		671	}
		672	}
		673
		674	/**
		675	* vmw_translate_guest_pointer - Prepare to translate a user-space buffer
		676	* handle to a valid SVGAGuestPtr
		677	*
		678	* @dev_priv: Pointer to a device private structure.
		679	* @sw_context: The software context used for this command batch validation.
		680	* @ptr: Pointer to the user-space handle to be translated.
		681	* @vmw_bo_p: Points to a location that, on successful return will carry
		682	* a reference-counted pointer to the DMA buffer identified by the
		683	* user-space handle in @id.
		684	*
		685	* This function saves information needed to translate a user-space buffer
		686	* handle to a valid SVGAGuestPtr. The translation does not take place
		687	* immediately, but during a call to vmw_apply_relocations().
		688	* This function builds a relocation list and a list of buffers to validate.
		689	* The former needs to be freed using either vmw_apply_relocations() or
		690	* vmw_free_relocations(). The latter needs to be freed using
		691	* vmw_clear_validations.
		692	*/
		693	static int vmw_translate_guest_ptr(struct vmw_private *dev_priv,
		694	struct vmw_sw_context *sw_context,
		695	SVGAGuestPtr *ptr,
		696	struct vmw_dma_buffer **vmw_bo_p)
		697	{
		698	struct vmw_dma_buffer *vmw_bo = NULL;
		699	struct ttm_buffer_object *bo;
		700	uint32_t handle = ptr->gmrId;
		701	struct vmw_relocation *reloc;
		702	int ret;
		703
		704	ret = vmw_user_dmabuf_lookup(sw_context->tfile, handle, &vmw_bo);
		705	if (unlikely(ret != 0)) {
		706	DRM_ERROR("Could not find or use GMR region.\n");
		707	return -EINVAL;
		708	}
		709	bo = &vmw_bo->base;
		710
		711	if (unlikely(sw_context->cur_reloc >= VMWGFX_MAX_RELOCATIONS)) {
		712	DRM_ERROR("Max number relocations per submission"
		713	" exceeded\n");
		714	ret = -EINVAL;
		715	goto out_no_reloc;
		716	}
		717
		718	reloc = &sw_context->relocs[sw_context->cur_reloc++];
		719	reloc->location = ptr;
		720
		721	ret = vmw_bo_to_validate_list(sw_context, bo, &reloc->index);
		722	if (unlikely(ret != 0))
		723	goto out_no_reloc;
		724
		725	*vmw_bo_p = vmw_bo;
		726	return 0;
		727
		728	out_no_reloc:
		729	vmw_dmabuf_unreference(&vmw_bo);
		730	vmw_bo_p = NULL;
		731	return ret;
		732	}
		733
		734	/**
		735	* vmw_cmd_begin_query - validate a SVGA_3D_CMD_BEGIN_QUERY command.
		736	*
		737	* @dev_priv: Pointer to a device private struct.
		738	* @sw_context: The software context used for this command submission.
		739	* @header: Pointer to the command header in the command stream.
		740	*/
		741	static int vmw_cmd_begin_query(struct vmw_private *dev_priv,
		742	struct vmw_sw_context *sw_context,
		743	SVGA3dCmdHeader *header)
		744	{
		745	struct vmw_begin_query_cmd {
		746	SVGA3dCmdHeader header;
		747	SVGA3dCmdBeginQuery q;
		748	} *cmd;
		749
		750	cmd = container_of(header, struct vmw_begin_query_cmd,
		751	header);
		752
		753	return vmw_cmd_res_check(dev_priv, sw_context, vmw_res_context,
		754	user_context_converter, &cmd->q.cid,
		755	NULL);
		756	}
		757
		758	/**
		759	* vmw_cmd_end_query - validate a SVGA_3D_CMD_END_QUERY command.
		760	*
		761	* @dev_priv: Pointer to a device private struct.
		762	* @sw_context: The software context used for this command submission.
		763	* @header: Pointer to the command header in the command stream.
		764	*/
		765	static int vmw_cmd_end_query(struct vmw_private *dev_priv,
		766	struct vmw_sw_context *sw_context,
		767	SVGA3dCmdHeader *header)
		768	{
		769	struct vmw_dma_buffer *vmw_bo;
		770	struct vmw_query_cmd {
		771	SVGA3dCmdHeader header;
		772	SVGA3dCmdEndQuery q;
		773	} *cmd;
		774	int ret;
		775
		776	cmd = container_of(header, struct vmw_query_cmd, header);
		777	ret = vmw_cmd_cid_check(dev_priv, sw_context, header);
		778	if (unlikely(ret != 0))
		779	return ret;
		780
		781	ret = vmw_translate_guest_ptr(dev_priv, sw_context,
		782	&cmd->q.guestResult,
		783	&vmw_bo);
		784	if (unlikely(ret != 0))
		785	return ret;
		786
		787	ret = vmw_query_bo_switch_prepare(dev_priv, &vmw_bo->base, sw_context);
		788
		789	vmw_dmabuf_unreference(&vmw_bo);
		790	return ret;
		791	}
		792
		793	/*
		794	* vmw_cmd_wait_query - validate a SVGA_3D_CMD_WAIT_QUERY command.
		795	*
		796	* @dev_priv: Pointer to a device private struct.
		797	* @sw_context: The software context used for this command submission.
		798	* @header: Pointer to the command header in the command stream.
		799	*/
		800	static int vmw_cmd_wait_query(struct vmw_private *dev_priv,
		801	struct vmw_sw_context *sw_context,
		802	SVGA3dCmdHeader *header)
		803	{
		804	struct vmw_dma_buffer *vmw_bo;
		805	struct vmw_query_cmd {
		806	SVGA3dCmdHeader header;
		807	SVGA3dCmdWaitForQuery q;
		808	} *cmd;
		809	int ret;
		810
		811	cmd = container_of(header, struct vmw_query_cmd, header);
		812	ret = vmw_cmd_cid_check(dev_priv, sw_context, header);
		813	if (unlikely(ret != 0))
		814	return ret;
		815
		816	ret = vmw_translate_guest_ptr(dev_priv, sw_context,
		817	&cmd->q.guestResult,
		818	&vmw_bo);
		819	if (unlikely(ret != 0))
		820	return ret;
		821
		822	vmw_dmabuf_unreference(&vmw_bo);
		823	return 0;
		824	}
		825
		826	static int vmw_cmd_dma(struct vmw_private *dev_priv,
		827	struct vmw_sw_context *sw_context,
		828	SVGA3dCmdHeader *header)
		829	{
		830	struct vmw_dma_buffer *vmw_bo = NULL;
		831	struct vmw_surface *srf = NULL;
		832	struct vmw_dma_cmd {
		833	SVGA3dCmdHeader header;
		834	SVGA3dCmdSurfaceDMA dma;
		835	} *cmd;
		836	int ret;
		837
		838	cmd = container_of(header, struct vmw_dma_cmd, header);
		839	ret = vmw_translate_guest_ptr(dev_priv, sw_context,
		840	&cmd->dma.guest.ptr,
		841	&vmw_bo);
		842	if (unlikely(ret != 0))
		843	return ret;
		844
		845	ret = vmw_cmd_res_check(dev_priv, sw_context, vmw_res_surface,
		846	user_surface_converter, &cmd->dma.host.sid,
		847	NULL);
		848	if (unlikely(ret != 0)) {
		849	if (unlikely(ret != -ERESTARTSYS))
		850	DRM_ERROR("could not find surface for DMA.\n");
		851	goto out_no_surface;
		852	}
		853
		854	srf = vmw_res_to_srf(sw_context->res_cache[vmw_res_surface].res);
		855
		856	// vmw_kms_cursor_snoop(srf, sw_context->tfile, &vmw_bo->base, header);
		857
		858	out_no_surface:
		859	vmw_dmabuf_unreference(&vmw_bo);
		860	return ret;
		861	}
		862
		863	static int vmw_cmd_draw(struct vmw_private *dev_priv,
		864	struct vmw_sw_context *sw_context,
		865	SVGA3dCmdHeader *header)
		866	{
		867	struct vmw_draw_cmd {
		868	SVGA3dCmdHeader header;
		869	SVGA3dCmdDrawPrimitives body;
		870	} *cmd;
		871	SVGA3dVertexDecl decl = (SVGA3dVertexDecl )(
		872	(unsigned long)header + sizeof(*cmd));
		873	SVGA3dPrimitiveRange *range;
		874	uint32_t i;
		875	uint32_t maxnum;
		876	int ret;
		877
		878	ret = vmw_cmd_cid_check(dev_priv, sw_context, header);
		879	if (unlikely(ret != 0))
		880	return ret;
		881
		882	cmd = container_of(header, struct vmw_draw_cmd, header);
		883	maxnum = (header->size - sizeof(cmd->body)) / sizeof(*decl);
		884
		885	if (unlikely(cmd->body.numVertexDecls > maxnum)) {
		886	DRM_ERROR("Illegal number of vertex declarations.\n");
		887	return -EINVAL;
		888	}
		889
		890	for (i = 0; i < cmd->body.numVertexDecls; ++i, ++decl) {
		891	ret = vmw_cmd_res_check(dev_priv, sw_context, vmw_res_surface,
		892	user_surface_converter,
		893	&decl->array.surfaceId, NULL);
		894	if (unlikely(ret != 0))
		895	return ret;
		896	}
		897
		898	maxnum = (header->size - sizeof(cmd->body) -
		899	cmd->body.numVertexDecls * sizeof(decl)) / sizeof(range);
		900	if (unlikely(cmd->body.numRanges > maxnum)) {
		901	DRM_ERROR("Illegal number of index ranges.\n");
		902	return -EINVAL;
		903	}
		904
		905	range = (SVGA3dPrimitiveRange *) decl;
		906	for (i = 0; i < cmd->body.numRanges; ++i, ++range) {
		907	ret = vmw_cmd_res_check(dev_priv, sw_context, vmw_res_surface,
		908	user_surface_converter,
		909	&range->indexArray.surfaceId, NULL);
		910	if (unlikely(ret != 0))
		911	return ret;
		912	}
		913	return 0;
		914	}
		915
		916
		917	static int vmw_cmd_tex_state(struct vmw_private *dev_priv,
		918	struct vmw_sw_context *sw_context,
		919	SVGA3dCmdHeader *header)
		920	{
		921	struct vmw_tex_state_cmd {
		922	SVGA3dCmdHeader header;
		923	SVGA3dCmdSetTextureState state;
		924	};
		925
		926	SVGA3dTextureState last_state = (SVGA3dTextureState )
		927	((unsigned long) header + header->size + sizeof(header));
		928	SVGA3dTextureState cur_state = (SVGA3dTextureState )
		929	((unsigned long) header + sizeof(struct vmw_tex_state_cmd));
		930	int ret;
		931
		932	ret = vmw_cmd_cid_check(dev_priv, sw_context, header);
		933	if (unlikely(ret != 0))
		934	return ret;
		935
		936	for (; cur_state < last_state; ++cur_state) {
		937	if (likely(cur_state->name != SVGA3D_TS_BIND_TEXTURE))
		938	continue;
		939
		940	ret = vmw_cmd_res_check(dev_priv, sw_context, vmw_res_surface,
		941	user_surface_converter,
		942	&cur_state->value, NULL);
		943	if (unlikely(ret != 0))
		944	return ret;
		945	}
		946
		947	return 0;
		948	}
		949
		950	static int vmw_cmd_check_define_gmrfb(struct vmw_private *dev_priv,
		951	struct vmw_sw_context *sw_context,
		952	void *buf)
		953	{
		954	struct vmw_dma_buffer *vmw_bo;
		955	int ret;
		956
		957	struct {
		958	uint32_t header;
		959	SVGAFifoCmdDefineGMRFB body;
		960	} *cmd = buf;
		961
		962	ret = vmw_translate_guest_ptr(dev_priv, sw_context,
		963	&cmd->body.ptr,
		964	&vmw_bo);
		965	if (unlikely(ret != 0))
		966	return ret;
		967
		968	vmw_dmabuf_unreference(&vmw_bo);
		969
		970	return ret;
		971	}
		972
		973	/**
		974	* vmw_cmd_set_shader - Validate an SVGA_3D_CMD_SET_SHADER
		975	* command
		976	*
		977	* @dev_priv: Pointer to a device private struct.
		978	* @sw_context: The software context being used for this batch.
		979	* @header: Pointer to the command header in the command stream.
		980	*/
		981	static int vmw_cmd_set_shader(struct vmw_private *dev_priv,
		982	struct vmw_sw_context *sw_context,
		983	SVGA3dCmdHeader *header)
		984	{
		985	struct vmw_set_shader_cmd {
		986	SVGA3dCmdHeader header;
		987	SVGA3dCmdSetShader body;
		988	} *cmd;
		989	int ret;
		990
		991	cmd = container_of(header, struct vmw_set_shader_cmd,
		992	header);
		993
		994	ret = vmw_cmd_cid_check(dev_priv, sw_context, header);
		995	if (unlikely(ret != 0))
		996	return ret;
		997
		998	return 0;
		999	}
		1000
		1001	static int vmw_cmd_check_not_3d(struct vmw_private *dev_priv,
		1002	struct vmw_sw_context *sw_context,
		1003	void buf, uint32_t size)
		1004	{
		1005	uint32_t size_remaining = *size;
		1006	uint32_t cmd_id;
		1007
		1008	cmd_id = le32_to_cpu(((uint32_t *)buf)[0]);
		1009	switch (cmd_id) {
		1010	case SVGA_CMD_UPDATE:
		1011	*size = sizeof(uint32_t) + sizeof(SVGAFifoCmdUpdate);
		1012	break;
		1013	case SVGA_CMD_DEFINE_GMRFB:
		1014	*size = sizeof(uint32_t) + sizeof(SVGAFifoCmdDefineGMRFB);
		1015	break;
		1016	case SVGA_CMD_BLIT_GMRFB_TO_SCREEN:
		1017	*size = sizeof(uint32_t) + sizeof(SVGAFifoCmdBlitGMRFBToScreen);
		1018	break;
		1019	case SVGA_CMD_BLIT_SCREEN_TO_GMRFB:
		1020	*size = sizeof(uint32_t) + sizeof(SVGAFifoCmdBlitGMRFBToScreen);
		1021	break;
		1022	default:
		1023	DRM_ERROR("Unsupported SVGA command: %u.\n", cmd_id);
		1024	return -EINVAL;
		1025	}
		1026
		1027	if (*size > size_remaining) {
		1028	DRM_ERROR("Invalid SVGA command (size mismatch):"
		1029	" %u.\n", cmd_id);
		1030	return -EINVAL;
		1031	}
		1032
		1033	if (unlikely(!sw_context->kernel)) {
		1034	DRM_ERROR("Kernel only SVGA command: %u.\n", cmd_id);
		1035	return -EPERM;
		1036	}
		1037
		1038	if (cmd_id == SVGA_CMD_DEFINE_GMRFB)
		1039	return vmw_cmd_check_define_gmrfb(dev_priv, sw_context, buf);
		1040
		1041	return 0;
		1042	}
		1043
		1044	typedef int (vmw_cmd_func) (struct vmw_private ,
		1045	struct vmw_sw_context *,
		1046	SVGA3dCmdHeader *);
		1047
		1048	#define VMW_CMD_DEF(cmd, func) \
		1049	[cmd - SVGA_3D_CMD_BASE] = func
		1050
		1051	static vmw_cmd_func vmw_cmd_funcs[SVGA_3D_CMD_MAX] = {
		1052	VMW_CMD_DEF(SVGA_3D_CMD_SURFACE_DEFINE, &vmw_cmd_invalid),
		1053	VMW_CMD_DEF(SVGA_3D_CMD_SURFACE_DESTROY, &vmw_cmd_invalid),
		1054	VMW_CMD_DEF(SVGA_3D_CMD_SURFACE_COPY, &vmw_cmd_surface_copy_check),
		1055	VMW_CMD_DEF(SVGA_3D_CMD_SURFACE_STRETCHBLT, &vmw_cmd_stretch_blt_check),
		1056	VMW_CMD_DEF(SVGA_3D_CMD_SURFACE_DMA, &vmw_cmd_dma),
		1057	VMW_CMD_DEF(SVGA_3D_CMD_CONTEXT_DEFINE, &vmw_cmd_invalid),
		1058	VMW_CMD_DEF(SVGA_3D_CMD_CONTEXT_DESTROY, &vmw_cmd_invalid),
		1059	VMW_CMD_DEF(SVGA_3D_CMD_SETTRANSFORM, &vmw_cmd_cid_check),
		1060	VMW_CMD_DEF(SVGA_3D_CMD_SETZRANGE, &vmw_cmd_cid_check),
		1061	VMW_CMD_DEF(SVGA_3D_CMD_SETRENDERSTATE, &vmw_cmd_cid_check),
		1062	VMW_CMD_DEF(SVGA_3D_CMD_SETRENDERTARGET,
		1063	&vmw_cmd_set_render_target_check),
		1064	VMW_CMD_DEF(SVGA_3D_CMD_SETTEXTURESTATE, &vmw_cmd_tex_state),
		1065	VMW_CMD_DEF(SVGA_3D_CMD_SETMATERIAL, &vmw_cmd_cid_check),
		1066	VMW_CMD_DEF(SVGA_3D_CMD_SETLIGHTDATA, &vmw_cmd_cid_check),
		1067	VMW_CMD_DEF(SVGA_3D_CMD_SETLIGHTENABLED, &vmw_cmd_cid_check),
		1068	VMW_CMD_DEF(SVGA_3D_CMD_SETVIEWPORT, &vmw_cmd_cid_check),
		1069	VMW_CMD_DEF(SVGA_3D_CMD_SETCLIPPLANE, &vmw_cmd_cid_check),
		1070	VMW_CMD_DEF(SVGA_3D_CMD_CLEAR, &vmw_cmd_cid_check),
		1071	VMW_CMD_DEF(SVGA_3D_CMD_PRESENT, &vmw_cmd_present_check),
		1072	VMW_CMD_DEF(SVGA_3D_CMD_SHADER_DEFINE, &vmw_cmd_cid_check),
		1073	VMW_CMD_DEF(SVGA_3D_CMD_SHADER_DESTROY, &vmw_cmd_cid_check),
		1074	VMW_CMD_DEF(SVGA_3D_CMD_SET_SHADER, &vmw_cmd_set_shader),
		1075	VMW_CMD_DEF(SVGA_3D_CMD_SET_SHADER_CONST, &vmw_cmd_cid_check),
		1076	VMW_CMD_DEF(SVGA_3D_CMD_DRAW_PRIMITIVES, &vmw_cmd_draw),
		1077	VMW_CMD_DEF(SVGA_3D_CMD_SETSCISSORRECT, &vmw_cmd_cid_check),
		1078	VMW_CMD_DEF(SVGA_3D_CMD_BEGIN_QUERY, &vmw_cmd_begin_query),
		1079	VMW_CMD_DEF(SVGA_3D_CMD_END_QUERY, &vmw_cmd_end_query),
		1080	VMW_CMD_DEF(SVGA_3D_CMD_WAIT_FOR_QUERY, &vmw_cmd_wait_query),
		1081	VMW_CMD_DEF(SVGA_3D_CMD_PRESENT_READBACK, &vmw_cmd_ok),
		1082	VMW_CMD_DEF(SVGA_3D_CMD_BLIT_SURFACE_TO_SCREEN,
		1083	&vmw_cmd_blt_surf_screen_check),
		1084	VMW_CMD_DEF(SVGA_3D_CMD_SURFACE_DEFINE_V2, &vmw_cmd_invalid),
		1085	VMW_CMD_DEF(SVGA_3D_CMD_GENERATE_MIPMAPS, &vmw_cmd_invalid),
		1086	VMW_CMD_DEF(SVGA_3D_CMD_ACTIVATE_SURFACE, &vmw_cmd_invalid),
		1087	VMW_CMD_DEF(SVGA_3D_CMD_DEACTIVATE_SURFACE, &vmw_cmd_invalid),
		1088	};
		1089
		1090	static int vmw_cmd_check(struct vmw_private *dev_priv,
		1091	struct vmw_sw_context *sw_context,
		1092	void buf, uint32_t size)
		1093	{
		1094	uint32_t cmd_id;
		1095	uint32_t size_remaining = *size;
		1096	SVGA3dCmdHeader header = (SVGA3dCmdHeader ) buf;
		1097	int ret;
		1098
		1099	cmd_id = le32_to_cpu(((uint32_t *)buf)[0]);
		1100	/* Handle any none 3D commands */
		1101	if (unlikely(cmd_id < SVGA_CMD_MAX))
		1102	return vmw_cmd_check_not_3d(dev_priv, sw_context, buf, size);
		1103
		1104
		1105	cmd_id = le32_to_cpu(header->id);
		1106	*size = le32_to_cpu(header->size) + sizeof(SVGA3dCmdHeader);
		1107
		1108	cmd_id -= SVGA_3D_CMD_BASE;
		1109	if (unlikely(*size > size_remaining))
		1110	goto out_err;
		1111
		1112	if (unlikely(cmd_id >= SVGA_3D_CMD_MAX - SVGA_3D_CMD_BASE))
		1113	goto out_err;
		1114
		1115	ret = vmw_cmd_funcs[cmd_id](dev_priv, sw_context, header);
		1116	if (unlikely(ret != 0))
		1117	goto out_err;
		1118
		1119	return 0;
		1120	out_err:
		1121	DRM_ERROR("Illegal / Invalid SVGA3D command: %d\n",
		1122	cmd_id + SVGA_3D_CMD_BASE);
		1123	return -EINVAL;
		1124	}
		1125
		1126	static int vmw_cmd_check_all(struct vmw_private *dev_priv,
		1127	struct vmw_sw_context *sw_context,
		1128	void *buf,
		1129	uint32_t size)
		1130	{
		1131	int32_t cur_size = size;
		1132	int ret;
		1133
		1134	sw_context->buf_start = buf;
		1135
		1136	while (cur_size > 0) {
		1137	size = cur_size;
		1138	ret = vmw_cmd_check(dev_priv, sw_context, buf, &size);
		1139	if (unlikely(ret != 0))
		1140	return ret;
		1141	buf = (void *)((unsigned long) buf + size);
		1142	cur_size -= size;
		1143	}
		1144
		1145	if (unlikely(cur_size != 0)) {
		1146	DRM_ERROR("Command verifier out of sync.\n");
		1147	return -EINVAL;
		1148	}
		1149
		1150	return 0;
		1151	}
		1152
		1153	static void vmw_free_relocations(struct vmw_sw_context *sw_context)
		1154	{
		1155	sw_context->cur_reloc = 0;
		1156	}
		1157
		1158	static void vmw_apply_relocations(struct vmw_sw_context *sw_context)
		1159	{
		1160	uint32_t i;
		1161	struct vmw_relocation *reloc;
		1162	struct ttm_validate_buffer *validate;
		1163	struct ttm_buffer_object *bo;
		1164
		1165	for (i = 0; i < sw_context->cur_reloc; ++i) {
		1166	reloc = &sw_context->relocs[i];
		1167	validate = &sw_context->val_bufs[reloc->index].base;
		1168	bo = validate->bo;
		1169	switch (bo->mem.mem_type) {
		1170	case TTM_PL_VRAM:
		1171	reloc->location->offset += bo->offset;
		1172	reloc->location->gmrId = SVGA_GMR_FRAMEBUFFER;
		1173	break;
		1174	case VMW_PL_GMR:
		1175	reloc->location->gmrId = bo->mem.start;
		1176	break;
		1177	default:
		1178	BUG();
		1179	}
		1180	}
		1181	vmw_free_relocations(sw_context);
		1182	}
		1183
		1184	/**
		1185	* vmw_resource_list_unrefererence - Free up a resource list and unreference
		1186	* all resources referenced by it.
		1187	*
		1188	* @list: The resource list.
		1189	*/
		1190	static void vmw_resource_list_unreference(struct list_head *list)
		1191	{
		1192	struct vmw_resource_val_node val, val_next;
		1193
		1194	/*
		1195	* Drop references to resources held during command submission.
		1196	*/
		1197
		1198	list_for_each_entry_safe(val, val_next, list, head) {
		1199	list_del_init(&val->head);
		1200	vmw_resource_unreference(&val->res);
		1201	kfree(val);
		1202	}
		1203	}
		1204
		1205	static void vmw_clear_validations(struct vmw_sw_context *sw_context)
		1206	{
		1207	struct vmw_validate_buffer entry, next;
		1208	struct vmw_resource_val_node *val;
		1209
		1210	/*
		1211	* Drop references to DMA buffers held during command submission.
		1212	*/
		1213	list_for_each_entry_safe(entry, next, &sw_context->validate_nodes,
		1214	base.head) {
		1215	list_del(&entry->base.head);
		1216	ttm_bo_unref(&entry->base.bo);
		1217	(void) drm_ht_remove_item(&sw_context->res_ht, &entry->hash);
		1218	sw_context->cur_val_buf--;
		1219	}
		1220	BUG_ON(sw_context->cur_val_buf != 0);
		1221
		1222	list_for_each_entry(val, &sw_context->resource_list, head)
		1223	(void) drm_ht_remove_item(&sw_context->res_ht, &val->hash);
		1224	}
		1225
		1226	static int vmw_validate_single_buffer(struct vmw_private *dev_priv,
		1227	struct ttm_buffer_object *bo)
		1228	{
		1229	int ret;
		1230
		1231
		1232	/*
		1233	* Don't validate pinned buffers.
		1234	*/
		1235
		1236	if (bo == dev_priv->pinned_bo \|\|
		1237	(bo == dev_priv->dummy_query_bo &&
		1238	dev_priv->dummy_query_bo_pinned))
		1239	return 0;
		1240
		1241	/**
		1242	* Put BO in VRAM if there is space, otherwise as a GMR.
		1243	* If there is no space in VRAM and GMR ids are all used up,
		1244	* start evicting GMRs to make room. If the DMA buffer can't be
		1245	* used as a GMR, this will return -ENOMEM.
		1246	*/
		1247
		1248	ret = ttm_bo_validate(bo, &vmw_vram_gmr_placement, true, false);
		1249	if (likely(ret == 0 \|\| ret == -ERESTARTSYS))
		1250	return ret;
		1251
		1252	/**
		1253	* If that failed, try VRAM again, this time evicting
		1254	* previous contents.
		1255	*/
		1256
		1257	DRM_INFO("Falling through to VRAM.\n");
		1258	ret = ttm_bo_validate(bo, &vmw_vram_placement, true, false);
		1259	return ret;
		1260	}
		1261
		1262
		1263	static int vmw_validate_buffers(struct vmw_private *dev_priv,
		1264	struct vmw_sw_context *sw_context)
		1265	{
		1266	struct vmw_validate_buffer *entry;
		1267	int ret;
		1268
		1269	list_for_each_entry(entry, &sw_context->validate_nodes, base.head) {
		1270	ret = vmw_validate_single_buffer(dev_priv, entry->base.bo);
		1271	if (unlikely(ret != 0))
		1272	return ret;
		1273	}
		1274	return 0;
		1275	}
		1276
		1277	static int vmw_resize_cmd_bounce(struct vmw_sw_context *sw_context,
		1278	uint32_t size)
		1279	{
		1280	if (likely(sw_context->cmd_bounce_size >= size))
		1281	return 0;
		1282
		1283	if (sw_context->cmd_bounce_size == 0)
		1284	sw_context->cmd_bounce_size = VMWGFX_CMD_BOUNCE_INIT_SIZE;
		1285
		1286	while (sw_context->cmd_bounce_size < size) {
		1287	sw_context->cmd_bounce_size =
		1288	PAGE_ALIGN(sw_context->cmd_bounce_size +
		1289	(sw_context->cmd_bounce_size >> 1));
		1290	}
		1291
		1292	if (sw_context->cmd_bounce != NULL)
		1293	vfree(sw_context->cmd_bounce);
		1294
		1295	sw_context->cmd_bounce = KernelAlloc(sw_context->cmd_bounce_size);
		1296
		1297	if (sw_context->cmd_bounce == NULL) {
		1298	DRM_ERROR("Failed to allocate command bounce buffer.\n");
		1299	sw_context->cmd_bounce_size = 0;
		1300	return -ENOMEM;
		1301	}
		1302
		1303	return 0;
		1304	}
		1305
		1306	/**
		1307	* vmw_execbuf_fence_commands - create and submit a command stream fence
		1308	*
		1309	* Creates a fence object and submits a command stream marker.
		1310	* If this fails for some reason, We sync the fifo and return NULL.
		1311	* It is then safe to fence buffers with a NULL pointer.
		1312	*
		1313	* If @p_handle is not NULL @file_priv must also not be NULL. Creates
		1314	* a userspace handle if @p_handle is not NULL, otherwise not.
		1315	*/
		1316
		1317	int vmw_execbuf_fence_commands(struct drm_file *file_priv,
		1318	struct vmw_private *dev_priv,
		1319	struct vmw_fence_obj **p_fence,
		1320	uint32_t *p_handle)
		1321	{
		1322	uint32_t sequence;
		1323	int ret;
		1324	bool synced = false;
		1325
		1326	/* p_handle implies file_priv. */
		1327	BUG_ON(p_handle != NULL && file_priv == NULL);
		1328
		1329	ret = vmw_fifo_send_fence(dev_priv, &sequence);
		1330	if (unlikely(ret != 0)) {
		1331	DRM_ERROR("Fence submission error. Syncing.\n");
		1332	synced = true;
		1333	}
		1334
		1335	if (p_handle != NULL)
		1336	ret = vmw_user_fence_create(file_priv, dev_priv->fman,
		1337	sequence,
		1338	DRM_VMW_FENCE_FLAG_EXEC,
		1339	p_fence, p_handle);
		1340	else
		1341	ret = vmw_fence_create(dev_priv->fman, sequence,
		1342	DRM_VMW_FENCE_FLAG_EXEC,
		1343	p_fence);
		1344
		1345	if (unlikely(ret != 0 && !synced)) {
		1346	(void) vmw_fallback_wait(dev_priv, false, false,
		1347	sequence, false,
		1348	VMW_FENCE_WAIT_TIMEOUT);
		1349	*p_fence = NULL;
		1350	}
		1351
		1352	return 0;
		1353	}
		1354
		1355	/**
		1356	* vmw_execbuf_copy_fence_user - copy fence object information to
		1357	* user-space.
		1358	*
		1359	* @dev_priv: Pointer to a vmw_private struct.
		1360	* @vmw_fp: Pointer to the struct vmw_fpriv representing the calling file.
		1361	* @ret: Return value from fence object creation.
		1362	* @user_fence_rep: User space address of a struct drm_vmw_fence_rep to
		1363	* which the information should be copied.
		1364	* @fence: Pointer to the fenc object.
		1365	* @fence_handle: User-space fence handle.
		1366	*
		1367	* This function copies fence information to user-space. If copying fails,
		1368	* The user-space struct drm_vmw_fence_rep::error member is hopefully
		1369	* left untouched, and if it's preloaded with an -EFAULT by user-space,
		1370	* the error will hopefully be detected.
		1371	* Also if copying fails, user-space will be unable to signal the fence
		1372	* object so we wait for it immediately, and then unreference the
		1373	* user-space reference.
		1374	*/
		1375	void
		1376	vmw_execbuf_copy_fence_user(struct vmw_private *dev_priv,
		1377	struct vmw_fpriv *vmw_fp,
		1378	int ret,
		1379	struct drm_vmw_fence_rep __user *user_fence_rep,
		1380	struct vmw_fence_obj *fence,
		1381	uint32_t fence_handle)
		1382	{
		1383	struct drm_vmw_fence_rep fence_rep;
		1384
		1385	if (user_fence_rep == NULL)
		1386	return;
		1387
		1388	memset(&fence_rep, 0, sizeof(fence_rep));
		1389
		1390	fence_rep.error = ret;
		1391	if (ret == 0) {
		1392	BUG_ON(fence == NULL);
		1393
		1394	fence_rep.handle = fence_handle;
		1395	fence_rep.seqno = fence->seqno;
		1396	vmw_update_seqno(dev_priv, &dev_priv->fifo);
		1397	fence_rep.passed_seqno = dev_priv->last_read_seqno;
		1398	}
		1399
		1400	/*
		1401	* copy_to_user errors will be detected by user space not
		1402	* seeing fence_rep::error filled in. Typically
		1403	* user-space would have pre-set that member to -EFAULT.
		1404	*/
		1405	// ret = copy_to_user(user_fence_rep, &fence_rep,
		1406	// sizeof(fence_rep));
		1407
		1408	/*
		1409	* User-space lost the fence object. We need to sync
		1410	* and unreference the handle.
		1411	*/
		1412	if (unlikely(ret != 0) && (fence_rep.error == 0)) {
		1413	ttm_ref_object_base_unref(vmw_fp->tfile,
		1414	fence_handle, TTM_REF_USAGE);
		1415	DRM_ERROR("Fence copy error. Syncing.\n");
		1416	(void) vmw_fence_obj_wait(fence, fence->signal_mask,
		1417	false, false,
		1418	VMW_FENCE_WAIT_TIMEOUT);
		1419	}
		1420	}
		1421
		1422	int vmw_execbuf_process(struct drm_file *file_priv,
		1423	struct vmw_private *dev_priv,
		1424	void __user *user_commands,
		1425	void *kernel_commands,
		1426	uint32_t command_size,
		1427	uint64_t throttle_us,
		1428	struct drm_vmw_fence_rep __user *user_fence_rep,
		1429	struct vmw_fence_obj **out_fence)
		1430	{
		1431	struct vmw_sw_context *sw_context = &dev_priv->ctx;
		1432	struct vmw_fence_obj *fence = NULL;
		1433	struct vmw_resource *error_resource;
		1434	struct list_head resource_list;
		1435	struct ww_acquire_ctx ticket;
		1436	uint32_t handle;
		1437	void *cmd;
		1438	int ret;
		1439
		1440	ret = mutex_lock_interruptible(&dev_priv->cmdbuf_mutex);
		1441	if (unlikely(ret != 0))
		1442	return -ERESTARTSYS;
		1443
		1444	/*
		1445	if (kernel_commands == NULL) {
		1446	sw_context->kernel = false;
		1447
		1448	ret = vmw_resize_cmd_bounce(sw_context, command_size);
		1449	if (unlikely(ret != 0))
		1450	goto out_unlock;
		1451
		1452
		1453	ret = copy_from_user(sw_context->cmd_bounce,
		1454	user_commands, command_size);
		1455
		1456	if (unlikely(ret != 0)) {
		1457	ret = -EFAULT;
		1458	DRM_ERROR("Failed copying commands.\n");
		1459	goto out_unlock;
		1460	}
		1461	kernel_commands = sw_context->cmd_bounce;
		1462	} else */
		1463	sw_context->kernel = true;
		1464
		1465	sw_context->tfile = vmw_fpriv(file_priv)->tfile;
		1466	sw_context->cur_reloc = 0;
		1467	sw_context->cur_val_buf = 0;
		1468	sw_context->fence_flags = 0;
		1469	INIT_LIST_HEAD(&sw_context->resource_list);
		1470	sw_context->cur_query_bo = dev_priv->pinned_bo;
		1471	sw_context->last_query_ctx = NULL;
		1472	sw_context->needs_post_query_barrier = false;
		1473	memset(sw_context->res_cache, 0, sizeof(sw_context->res_cache));
		1474	INIT_LIST_HEAD(&sw_context->validate_nodes);
		1475	INIT_LIST_HEAD(&sw_context->res_relocations);
		1476	if (!sw_context->res_ht_initialized) {
		1477	ret = drm_ht_create(&sw_context->res_ht, VMW_RES_HT_ORDER);
		1478	if (unlikely(ret != 0))
		1479	goto out_unlock;
		1480	sw_context->res_ht_initialized = true;
		1481	}
		1482
		1483	INIT_LIST_HEAD(&resource_list);
		1484	ret = vmw_cmd_check_all(dev_priv, sw_context, kernel_commands,
		1485	command_size);
		1486	if (unlikely(ret != 0))
		1487	goto out_err;
		1488
		1489	ret = vmw_resources_reserve(sw_context);
		1490	if (unlikely(ret != 0))
		1491	goto out_err;
		1492
		1493	ret = ttm_eu_reserve_buffers(&ticket, &sw_context->validate_nodes);
		1494	if (unlikely(ret != 0))
		1495	goto out_err;
		1496
		1497	ret = vmw_validate_buffers(dev_priv, sw_context);
		1498	if (unlikely(ret != 0))
		1499	goto out_err;
		1500
		1501	ret = vmw_resources_validate(sw_context);
		1502	if (unlikely(ret != 0))
		1503	goto out_err;
		1504
		1505	if (throttle_us) {
		1506	ret = vmw_wait_lag(dev_priv, &dev_priv->fifo.marker_queue,
		1507	throttle_us);
		1508
		1509	if (unlikely(ret != 0))
		1510	goto out_err;
		1511	}
		1512
		1513	cmd = vmw_fifo_reserve(dev_priv, command_size);
		1514	if (unlikely(cmd == NULL)) {
		1515	DRM_ERROR("Failed reserving fifo space for commands.\n");
		1516	ret = -ENOMEM;
		1517	goto out_err;
		1518	}
		1519
		1520	vmw_apply_relocations(sw_context);
		1521	memcpy(cmd, kernel_commands, command_size);
		1522
		1523	vmw_resource_relocations_apply(cmd, &sw_context->res_relocations);
		1524	vmw_resource_relocations_free(&sw_context->res_relocations);
		1525
		1526	vmw_fifo_commit(dev_priv, command_size);
		1527
		1528	vmw_query_bo_switch_commit(dev_priv, sw_context);
		1529	ret = vmw_execbuf_fence_commands(file_priv, dev_priv,
		1530	&fence,
		1531	(user_fence_rep) ? &handle : NULL);
		1532	/*
		1533	* This error is harmless, because if fence submission fails,
		1534	* vmw_fifo_send_fence will sync. The error will be propagated to
		1535	* user-space in @fence_rep
		1536	*/
		1537
		1538	if (ret != 0)
		1539	DRM_ERROR("Fence submission error. Syncing.\n");
		1540
		1541	vmw_resource_list_unreserve(&sw_context->resource_list, false);
		1542	ttm_eu_fence_buffer_objects(&ticket, &sw_context->validate_nodes,
		1543	(void *) fence);
		1544
		1545	if (unlikely(dev_priv->pinned_bo != NULL &&
		1546	!dev_priv->query_cid_valid))
		1547	__vmw_execbuf_release_pinned_bo(dev_priv, fence);
		1548
		1549	vmw_clear_validations(sw_context);
		1550	vmw_execbuf_copy_fence_user(dev_priv, vmw_fpriv(file_priv), ret,
		1551	user_fence_rep, fence, handle);
		1552
		1553	/* Don't unreference when handing fence out */
		1554	if (unlikely(out_fence != NULL)) {
		1555	*out_fence = fence;
		1556	fence = NULL;
		1557	} else if (likely(fence != NULL)) {
		1558	vmw_fence_obj_unreference(&fence);
		1559	}
		1560
		1561	list_splice_init(&sw_context->resource_list, &resource_list);
		1562	mutex_unlock(&dev_priv->cmdbuf_mutex);
		1563
		1564	/*
		1565	* Unreference resources outside of the cmdbuf_mutex to
		1566	* avoid deadlocks in resource destruction paths.
		1567	*/
		1568	vmw_resource_list_unreference(&resource_list);
		1569
		1570	return 0;
		1571
		1572	out_err:
		1573	vmw_resource_relocations_free(&sw_context->res_relocations);
		1574	vmw_free_relocations(sw_context);
		1575	ttm_eu_backoff_reservation(&ticket, &sw_context->validate_nodes);
		1576	vmw_resource_list_unreserve(&sw_context->resource_list, true);
		1577	vmw_clear_validations(sw_context);
		1578	if (unlikely(dev_priv->pinned_bo != NULL &&
		1579	!dev_priv->query_cid_valid))
		1580	__vmw_execbuf_release_pinned_bo(dev_priv, NULL);
		1581	out_unlock:
		1582	list_splice_init(&sw_context->resource_list, &resource_list);
		1583	error_resource = sw_context->error_resource;
		1584	sw_context->error_resource = NULL;
		1585	mutex_unlock(&dev_priv->cmdbuf_mutex);
		1586
		1587	/*
		1588	* Unreference resources outside of the cmdbuf_mutex to
		1589	* avoid deadlocks in resource destruction paths.
		1590	*/
		1591	vmw_resource_list_unreference(&resource_list);
		1592	if (unlikely(error_resource != NULL))
		1593	vmw_resource_unreference(&error_resource);
		1594
		1595	return ret;
		1596	}
		1597
		1598	/**
		1599	* vmw_execbuf_unpin_panic - Idle the fifo and unpin the query buffer.
		1600	*
		1601	* @dev_priv: The device private structure.
		1602	*
		1603	* This function is called to idle the fifo and unpin the query buffer
		1604	* if the normal way to do this hits an error, which should typically be
		1605	* extremely rare.
		1606	*/
		1607	static void vmw_execbuf_unpin_panic(struct vmw_private *dev_priv)
		1608	{
		1609	DRM_ERROR("Can't unpin query buffer. Trying to recover.\n");
		1610
		1611	(void) vmw_fallback_wait(dev_priv, false, true, 0, false, 10*HZ);
		1612	vmw_bo_pin(dev_priv->pinned_bo, false);
		1613	vmw_bo_pin(dev_priv->dummy_query_bo, false);
		1614	dev_priv->dummy_query_bo_pinned = false;
		1615	}
		1616
		1617
		1618	/**
		1619	* __vmw_execbuf_release_pinned_bo - Flush queries and unpin the pinned
		1620	* query bo.
		1621	*
		1622	* @dev_priv: The device private structure.
		1623	* @fence: If non-NULL should point to a struct vmw_fence_obj issued
		1624	* _after_ a query barrier that flushes all queries touching the current
		1625	* buffer pointed to by @dev_priv->pinned_bo
		1626	*
		1627	* This function should be used to unpin the pinned query bo, or
		1628	* as a query barrier when we need to make sure that all queries have
		1629	* finished before the next fifo command. (For example on hardware
		1630	* context destructions where the hardware may otherwise leak unfinished
		1631	* queries).
		1632	*
		1633	* This function does not return any failure codes, but make attempts
		1634	* to do safe unpinning in case of errors.
		1635	*
		1636	* The function will synchronize on the previous query barrier, and will
		1637	* thus not finish until that barrier has executed.
		1638	*
		1639	* the @dev_priv->cmdbuf_mutex needs to be held by the current thread
		1640	* before calling this function.
		1641	*/
		1642	void __vmw_execbuf_release_pinned_bo(struct vmw_private *dev_priv,
		1643	struct vmw_fence_obj *fence)
		1644	{
		1645	int ret = 0;
		1646	struct list_head validate_list;
		1647	struct ttm_validate_buffer pinned_val, query_val;
		1648	struct vmw_fence_obj *lfence = NULL;
		1649	struct ww_acquire_ctx ticket;
		1650
		1651	if (dev_priv->pinned_bo == NULL)
		1652	goto out_unlock;
		1653
		1654	INIT_LIST_HEAD(&validate_list);
		1655
		1656	pinned_val.bo = ttm_bo_reference(dev_priv->pinned_bo);
		1657	list_add_tail(&pinned_val.head, &validate_list);
		1658
		1659	query_val.bo = ttm_bo_reference(dev_priv->dummy_query_bo);
		1660	list_add_tail(&query_val.head, &validate_list);
		1661
		1662	do {
		1663	ret = ttm_eu_reserve_buffers(&ticket, &validate_list);
		1664	} while (ret == -ERESTARTSYS);
		1665
		1666	if (unlikely(ret != 0)) {
		1667	vmw_execbuf_unpin_panic(dev_priv);
		1668	goto out_no_reserve;
		1669	}
		1670
		1671	if (dev_priv->query_cid_valid) {
		1672	BUG_ON(fence != NULL);
		1673	ret = vmw_fifo_emit_dummy_query(dev_priv, dev_priv->query_cid);
		1674	if (unlikely(ret != 0)) {
		1675	vmw_execbuf_unpin_panic(dev_priv);
		1676	goto out_no_emit;
		1677	}
		1678	dev_priv->query_cid_valid = false;
		1679	}
		1680
		1681	vmw_bo_pin(dev_priv->pinned_bo, false);
		1682	vmw_bo_pin(dev_priv->dummy_query_bo, false);
		1683	dev_priv->dummy_query_bo_pinned = false;
		1684
		1685	if (fence == NULL) {
		1686	(void) vmw_execbuf_fence_commands(NULL, dev_priv, &lfence,
		1687	NULL);
		1688	fence = lfence;
		1689	}
		1690	ttm_eu_fence_buffer_objects(&ticket, &validate_list, (void *) fence);
		1691	if (lfence != NULL)
		1692	vmw_fence_obj_unreference(&lfence);
		1693
		1694	ttm_bo_unref(&query_val.bo);
		1695	ttm_bo_unref(&pinned_val.bo);
		1696	ttm_bo_unref(&dev_priv->pinned_bo);
		1697
		1698	out_unlock:
		1699	return;
		1700
		1701	out_no_emit:
		1702	ttm_eu_backoff_reservation(&ticket, &validate_list);
		1703	out_no_reserve:
		1704	ttm_bo_unref(&query_val.bo);
		1705	ttm_bo_unref(&pinned_val.bo);
		1706	ttm_bo_unref(&dev_priv->pinned_bo);
		1707	}
		1708
		1709	/**
		1710	* vmw_execbuf_release_pinned_bo - Flush queries and unpin the pinned
		1711	* query bo.
		1712	*
		1713	* @dev_priv: The device private structure.
		1714	*
		1715	* This function should be used to unpin the pinned query bo, or
		1716	* as a query barrier when we need to make sure that all queries have
		1717	* finished before the next fifo command. (For example on hardware
		1718	* context destructions where the hardware may otherwise leak unfinished
		1719	* queries).
		1720	*
		1721	* This function does not return any failure codes, but make attempts
		1722	* to do safe unpinning in case of errors.
		1723	*
		1724	* The function will synchronize on the previous query barrier, and will
		1725	* thus not finish until that barrier has executed.
		1726	*/
		1727	void vmw_execbuf_release_pinned_bo(struct vmw_private *dev_priv)
		1728	{
		1729	mutex_lock(&dev_priv->cmdbuf_mutex);
		1730	if (dev_priv->query_cid_valid)
		1731	__vmw_execbuf_release_pinned_bo(dev_priv, NULL);
		1732	mutex_unlock(&dev_priv->cmdbuf_mutex);
		1733	}
		1734
		1735
		1736	int vmw_execbuf_ioctl(struct drm_device dev, void data,
		1737	struct drm_file *file_priv)
		1738	{
		1739	struct vmw_private *dev_priv = vmw_priv(dev);
		1740	struct drm_vmw_execbuf_arg arg = (struct drm_vmw_execbuf_arg )data;
		1741	// struct vmw_master *vmaster = vmw_master(file_priv->master);
		1742	int ret;
		1743
		1744	/*
		1745	* This will allow us to extend the ioctl argument while
		1746	* maintaining backwards compatibility:
		1747	* We take different code paths depending on the value of
		1748	* arg->version.
		1749	*/
		1750
		1751	if (unlikely(arg->version != DRM_VMW_EXECBUF_VERSION)) {
		1752	DRM_ERROR("Incorrect execbuf version.\n");
		1753	DRM_ERROR("You're running outdated experimental "
		1754	"vmwgfx user-space drivers.");
		1755	return -EINVAL;
		1756	}
		1757
		1758	// ret = ttm_read_lock(&vmaster->lock, true);
		1759	if (unlikely(ret != 0))
		1760	return ret;
		1761
		1762	ret = vmw_execbuf_process(file_priv, dev_priv,
		1763	(void __user *)(unsigned long)arg->commands,
		1764	NULL, arg->command_size, arg->throttle_us,
		1765	(void __user *)(unsigned long)arg->fence_rep,
		1766	NULL);
		1767
		1768	if (unlikely(ret != 0))
		1769	goto out_unlock;
		1770
		1771	// vmw_kms_cursor_post_execbuf(dev_priv);
		1772
		1773	out_unlock:
		1774	// ttm_read_unlock(&vmaster->lock);
		1775	return ret;
		1776	}

Subversion Repositories Kolibri OS

(root)/drivers/video/drm/vmwgfx/vmwgfx_execbuf.c – Rev 4111