[vulkan] Get particle compute pipelines running

I don't yet know whether they actually work (not rendering yet), but the system isn't locking up, and shutdown is clean, so at least resources are handled correctly.
2024-11-22 20:41:20 +00:00 · 2022-11-28 00:52:07 +09:00 · 2022-11-28 00:52:07 +09:00 · d9b0ee22e6
commit d9b0ee22e6
parent dd1b15c92f
7 changed files with 288 additions and 73 deletions
--- a/include/QF/Vulkan/funclist.h
+++ b/include/QF/Vulkan/funclist.h
@ -101,12 +101,17 @@ DEVICE_LEVEL_VULKAN_FUNCTION (vkEndCommandBuffer)
 DEVICE_LEVEL_VULKAN_FUNCTION (vkResetCommandBuffer)
 DEVICE_LEVEL_VULKAN_FUNCTION (vkCreateSemaphore)
 DEVICE_LEVEL_VULKAN_FUNCTION (vkCreateFence)
+DEVICE_LEVEL_VULKAN_FUNCTION (vkCreateEvent)
 DEVICE_LEVEL_VULKAN_FUNCTION (vkWaitForFences)
 DEVICE_LEVEL_VULKAN_FUNCTION (vkResetFences)
 DEVICE_LEVEL_VULKAN_FUNCTION (vkGetFenceStatus)
+DEVICE_LEVEL_VULKAN_FUNCTION (vkResetEvent)
+DEVICE_LEVEL_VULKAN_FUNCTION (vkSetEvent)
+DEVICE_LEVEL_VULKAN_FUNCTION (vkGetEventStatus)
 DEVICE_LEVEL_VULKAN_FUNCTION (vkQueueSubmit)
 DEVICE_LEVEL_VULKAN_FUNCTION (vkQueueWaitIdle)
 DEVICE_LEVEL_VULKAN_FUNCTION (vkDeviceWaitIdle)
+DEVICE_LEVEL_VULKAN_FUNCTION (vkDestroyEvent)
 DEVICE_LEVEL_VULKAN_FUNCTION (vkDestroyFence)
 DEVICE_LEVEL_VULKAN_FUNCTION (vkDestroySemaphore)
 DEVICE_LEVEL_VULKAN_FUNCTION (vkFreeCommandBuffers)
@ -171,10 +176,15 @@ DEVICE_LEVEL_VULKAN_FUNCTION (vkCmdBeginRenderPass)
 DEVICE_LEVEL_VULKAN_FUNCTION (vkCmdNextSubpass)
 DEVICE_LEVEL_VULKAN_FUNCTION (vkCmdEndRenderPass)
 DEVICE_LEVEL_VULKAN_FUNCTION (vkCmdBindPipeline)
+DEVICE_LEVEL_VULKAN_FUNCTION (vkCmdDispatch)
 DEVICE_LEVEL_VULKAN_FUNCTION (vkCmdClearColorImage)
 DEVICE_LEVEL_VULKAN_FUNCTION (vkCmdExecuteCommands)
 DEVICE_LEVEL_VULKAN_FUNCTION (vkCmdPushConstants)

+DEVICE_LEVEL_VULKAN_FUNCTION (vkCmdResetEvent)
+DEVICE_LEVEL_VULKAN_FUNCTION (vkCmdSetEvent)
+DEVICE_LEVEL_VULKAN_FUNCTION (vkCmdWaitEvents)
+
 DEVICE_LEVEL_VULKAN_FUNCTION (vkCmdSetViewport)
 DEVICE_LEVEL_VULKAN_FUNCTION (vkCmdSetScissor)
 DEVICE_LEVEL_VULKAN_FUNCTION (vkCmdBindVertexBuffers)
--- a/include/QF/Vulkan/qf_particles.h
+++ b/include/QF/Vulkan/qf_particles.h
@ -3,6 +3,7 @@

 #include "QF/darray.h"
 #include "QF/image.h"
+#include "QF/render.h"

 #include "QF/Vulkan/command.h"

@ -37,14 +38,15 @@ typedef enum {

 typedef struct particleframe_s {
 	VkCommandBuffer compute;
-	VkSemaphore physSem;
-	VkSemaphore drawSem;
-	VkSemaphore updateSem;
-	VkBuffer    state;
+	VkEvent     physicsEvent;
+	VkEvent     updateEvent;
+	VkBuffer    states;
 	VkBuffer    params;
 	VkBuffer    system;

-	VkDescriptorSet descriptors;
+	VkDescriptorSet curDescriptors;
+	VkDescriptorSet inDescriptors;
+	VkDescriptorSet newDescriptors;

 	qfv_cmdbufferset_t cmdSet;
 } particleframe_t;
@ -58,7 +60,7 @@ typedef struct particlectx_s {
 	VkPipeline  update;
 	VkPipeline  draw;

-	VkDeviceMemory memory;
+	struct qfv_resource_s *resources;
 	struct qfv_stagebuf_s *stage;

 	VkDescriptorPool pool;
@ -77,5 +79,6 @@ struct psystem_s *Vulkan_ParticleSystem (struct vulkan_ctx_s *ctx);
 void Vulkan_Particles_Init (struct vulkan_ctx_s *ctx);
 void Vulkan_Particles_Shutdown (struct vulkan_ctx_s *ctx);
 void Vulkan_DrawParticles (struct vulkan_ctx_s *ctx);
+void Vulkan_Particles_CreateRenderPasses (struct vulkan_ctx_s *ctx);

 #endif//__QF_Vulkan_qf_particles_h
--- a/include/QF/Vulkan/qf_vid.h
+++ b/include/QF/Vulkan/qf_vid.h
@ -39,6 +39,7 @@
 */

 enum {
+	QFV_rp_particles,
 	QFV_rp_shadowmap,
 	QFV_rp_preoutput,
 	QFV_rp_main,
--- a/libs/video/renderer/vulkan/pl_quake_def.plist
+++ b/libs/video/renderer/vulkan/pl_quake_def.plist
@ -178,11 +178,11 @@
 		};
 		particle_pool = {
 			flags = 0;
-			maxSets = $frames.size;
+			maxSets = "3z * $frames.size";
 			bindings = (
 				{
 					type = storage_buffer;
-					descriptorCount = 3;
+					descriptorCount = "3z * 3z * $frames.size";
 				},
 			);
 		};
@ -499,7 +499,7 @@
 				{
 					stageFlags = compute;
 					offset = 0;
-					size = "16 * 4 + 4";
+					size = "4 * 4 + 4";
 				},
 			);
 		};
--- a/libs/video/renderer/vulkan/shader/partupdate.comp
+++ b/libs/video/renderer/vulkan/shader/partupdate.comp
@ -19,38 +19,38 @@ struct Parameters {
 	vec4        ramp;	// [rate, max, alpha rate, scale rate]
 };

-layout(std140, set = 0, binding = 0) buffer InStates {
-	Particle particles[];
-} inState;
-
-layout(std140, set = 0, binding = 1) buffer InParameters {
-	Parameters parameters[];
-} inParameters;
-
-//doubles as VkDrawIndirectCommand
-layout(std140, set = 0, binding = 2) buffer InSystem {
-	uint        vertexCount;
-	uint        particleCount;	//instanceCount
-	uint        firstVertex;
-	uint        firstInstance;
-} inSystem;
-
-layout(std140, set = 1, binding = 0) buffer OutStates {
+layout(std140, set = 0, binding = 0) buffer OutStates {
 	Particle particles[];
 } outStates;

-layout(std140, set = 1, binding = 1) buffer OutParameters {
+layout(std140, set = 0, binding = 1) buffer OutParameters {
 	Parameters parameters[];
 } outParameters;

 //doubles as VkDrawIndirectCommand
-layout(std140, set = 1, binding = 2) buffer OutSystem {
+layout(std140, set = 0, binding = 2) buffer OutSystem {
 	uint        vertexCount;
 	uint        particleCount;	//instanceCount
 	uint        firstVertex;
 	uint        firstInstance;
 } outSystem;

+layout(std140, set = 1, binding = 0) buffer InStates {
+	Particle particles[];
+} inStates;
+
+layout(std140, set = 1, binding = 1) buffer InParameters {
+	Parameters parameters[];
+} inParameters;
+
+//doubles as VkDrawIndirectCommand
+layout(std140, set = 1, binding = 2) buffer InSystem {
+	uint        vertexCount;
+	uint        particleCount;	//instanceCount
+	uint        firstVertex;
+	uint        firstInstance;
+} inSystem;
+
 layout(std140, set = 2, binding = 0) buffer NewStates {
 	Particle particles[];
 } newStates;
@ -85,21 +85,24 @@ main ()
 	uint        j = 0;
 	// compact existing partles removing dead particles
 	for (uint i = 0; i < inSystem.particleCount; i++) {
-		if (is_dead (inState.particles[i], inParameters.parameters[i])) {
+		if (is_dead (inStates.particles[i], inParameters.parameters[i])) {
 			continue;
 		}
-		outStates.particles[j] = inState.particles[i];
+		outStates.particles[j] = inStates.particles[i];
 		outParameters.parameters[j] = inParameters.parameters[i];
 		j++;
 	}
 	// inject any new particles that aren't DOA
 	for (uint i = 0; i < newSystem.particleCount && j < MaxParticles; i++) {
-		if (is_dead (inState.particles[i], inParameters.parameters[i])) {
+		if (is_dead (newStates.particles[i], newParameters.parameters[i])) {
 			continue;
 		}
 		outStates.particles[j] = newStates.particles[i];
 		outParameters.parameters[j] = newParameters.parameters[i];
 		j++;
 	}
+	outSystem.vertexCount = newSystem.vertexCount;
 	outSystem.particleCount = j;
+	outSystem.firstVertex = newSystem.firstVertex;
+	outSystem.firstInstance = newSystem.firstInstance;
 }
--- a/libs/video/renderer/vulkan/vulkan_particles.c
+++ b/libs/video/renderer/vulkan/vulkan_particles.c
@ -44,16 +44,25 @@

 #include "QF/Vulkan/buffer.h"
 #include "QF/Vulkan/debug.h"
+#include "QF/Vulkan/descriptor.h"
 #include "QF/Vulkan/device.h"
 #include "QF/Vulkan/instance.h"
+#include "QF/Vulkan/resource.h"
 #include "QF/Vulkan/staging.h"
 #include "QF/Vulkan/qf_particles.h"
+#include "QF/Vulkan/qf_renderpass.h"

+#include "r_internal.h"
 #include "vid_vulkan.h"

 //FIXME make dynamic
 #define MaxParticles 2048

+typedef struct {
+	vec4f_t     gravity;
+	float       dT;
+} particle_push_constants_t;
+
 static const char * __attribute__((used)) particle_pass_names[] = {
 	"draw",
 };
@ -69,48 +78,90 @@ create_buffers (vulkan_ctx_t *ctx)
 	qfv_device_t *device = ctx->device;
 	qfv_devfuncs_t *dfunc = device->funcs;
 	particlectx_t *pctx = ctx->particle_context;
-	size_t      size = 0;
 	size_t      mp = MaxParticles;
+	size_t      frames = ctx->frames.size;

-	VkMemoryRequirements stReq, parmReq, sysReq;
-	for (size_t i = 0; i < pctx->frames.size; i++) {
-		__auto_type pframe = &pctx->frames.a[i];
-		pframe->state
-			= QFV_CreateBuffer (device, sizeof (qfv_particle_t) * mp,
-								VK_BUFFER_USAGE_STORAGE_BUFFER_BIT
-								| VK_BUFFER_USAGE_VERTEX_BUFFER_BIT);
-		pframe->params
-			= QFV_CreateBuffer (device, sizeof (qfv_particle_t) * mp,
-								VK_BUFFER_USAGE_STORAGE_BUFFER_BIT);
-		pframe->system
-			= QFV_CreateBuffer (device, sizeof (qfv_particle_t) * mp,
-								VK_BUFFER_USAGE_STORAGE_BUFFER_BIT
-								| VK_BUFFER_USAGE_INDIRECT_BUFFER_BIT);
-		dfunc->vkGetBufferMemoryRequirements (device->dev, pframe->state,
-											  &stReq);
-		dfunc->vkGetBufferMemoryRequirements (device->dev, pframe->params,
-											  &parmReq);
-		dfunc->vkGetBufferMemoryRequirements (device->dev, pframe->system,
-											  &sysReq);
-		size = QFV_NextOffset (size + stReq.size, &stReq);
-		size = QFV_NextOffset (size + parmReq.size, &parmReq);
-		size = QFV_NextOffset (size + sysReq.size, &sysReq);
+	pctx->resources = malloc (sizeof (qfv_resource_t)
+							  // states buffer
+							  + frames * sizeof (qfv_resobj_t)
+							  // params buffer
+							  + frames * sizeof (qfv_resobj_t)
+							  // system buffer
+							  + frames * sizeof (qfv_resobj_t));
+	__auto_type state_objs = (qfv_resobj_t *) &pctx->resources[1];
+	__auto_type param_objs = &state_objs[frames];
+	__auto_type system_objs = &param_objs[frames];
+	pctx->resources[0] = (qfv_resource_t) {
+		.name = "particles",
+		.va_ctx = ctx->va_ctx,
+		.memory_properties = VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT,
+		.num_objects = 3 * frames,
+		.objects = state_objs,
+	};
+	for (size_t i = 0; i < frames; i++) {
+		state_objs[i] = (qfv_resobj_t) {
+			.name = "states",
+			.type = qfv_res_buffer,
+			.buffer = {
+				.size = mp * sizeof (qfv_particle_t),
+				.usage = VK_BUFFER_USAGE_STORAGE_BUFFER_BIT
+						| VK_BUFFER_USAGE_VERTEX_BUFFER_BIT,
+			},
+		};
+		param_objs[i] = (qfv_resobj_t) {
+			.name = "params",
+			.type = qfv_res_buffer,
+			.buffer = {
+				.size = mp * sizeof (qfv_parameters_t),
+				.usage = VK_BUFFER_USAGE_STORAGE_BUFFER_BIT,
+			},
+		};
+		system_objs[i] = (qfv_resobj_t) {
+			.name = "system",
+			.type = qfv_res_buffer,
+			.buffer = {
+				.size = sizeof (qfv_particle_system_t),
+				.usage = VK_BUFFER_USAGE_STORAGE_BUFFER_BIT
+						| VK_BUFFER_USAGE_INDIRECT_BUFFER_BIT,
+			},
+		};
 	}
-	size_t      stageSize = (size / pctx->frames.size)*(pctx->frames.size + 1);
+	QFV_CreateResource (device, pctx->resources);
+
+	size_t      stageSize = (pctx->resources->size / frames)*(frames + 1);
 	pctx->stage = QFV_CreateStagingBuffer (device, "particles", stageSize,
 										   ctx->cmdpool);
-	pctx->memory = QFV_AllocBufferMemory (device, pctx->frames.a[0].state,
-										  VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT,
-										  size, 0);
-	size_t      offset = 0;
-	for (size_t i = 0; i < pctx->frames.size; i++) {
+	for (size_t i = 0; i < frames; i++) {
 		__auto_type pframe = &pctx->frames.a[i];
-		QFV_BindBufferMemory (device, pframe->state, pctx->memory, offset);
-		offset = QFV_NextOffset (offset + stReq.size, &parmReq);
-		QFV_BindBufferMemory (device, pframe->params, pctx->memory, offset);
-		offset = QFV_NextOffset (offset + parmReq.size, &sysReq);
-		QFV_BindBufferMemory (device, pframe->system, pctx->memory, offset);
-		offset = QFV_NextOffset (offset + sysReq.size, &stReq);
+		pframe->states = state_objs[i].buffer.buffer;
+		pframe->params = param_objs[i].buffer.buffer;
+		pframe->system = system_objs[i].buffer.buffer;
+	}
+
+	for (size_t i = 0; i < frames; i++) {
+		__auto_type curr = &pctx->frames.a[i];
+		__auto_type prev = &pctx->frames.a[(i + frames - 1) % frames];
+		VkDescriptorBufferInfo bufferInfo[] = {
+			{ curr->states, 0, VK_WHOLE_SIZE },
+			{ curr->params, 0, VK_WHOLE_SIZE },
+			{ curr->system, 0, VK_WHOLE_SIZE },
+			{ prev->states, 0, VK_WHOLE_SIZE },
+			{ prev->params, 0, VK_WHOLE_SIZE },
+			{ prev->system, 0, VK_WHOLE_SIZE },
+		};
+		VkWriteDescriptorSet write[] = {
+			{ VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET, 0,
+				curr->curDescriptors, 0, 0, 3,
+				VK_DESCRIPTOR_TYPE_STORAGE_BUFFER,
+				.pBufferInfo = bufferInfo + 0
+			},
+			{ VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET, 0,
+				curr->inDescriptors, 0, 0, 3,
+				VK_DESCRIPTOR_TYPE_STORAGE_BUFFER,
+				.pBufferInfo = bufferInfo + 3
+			},
+		};
+		dfunc->vkUpdateDescriptorSets (device->dev, 2, write, 0, 0);
 	}
 }

@ -118,6 +169,7 @@ void
 Vulkan_Particles_Init (vulkan_ctx_t *ctx)
 {
 	qfv_device_t *device = ctx->device;
+	qfv_devfuncs_t *dfunc = device->funcs;

 	qfvPushDebug (ctx, "particles init");

@ -141,9 +193,19 @@ Vulkan_Particles_Init (vulkan_ctx_t *ctx)
 	pctx->pool = Vulkan_CreateDescriptorPool (ctx, "particle_pool");
 	pctx->setLayout = Vulkan_CreateDescriptorSetLayout (ctx, "particle_set");

+	__auto_type layouts = QFV_AllocDescriptorSetLayoutSet (3 * frames, alloca);
+	for (size_t i = 0; i < layouts->size; i++) {
+		layouts->a[i] = pctx->setLayout;
+	}
+	__auto_type sets = QFV_AllocateDescriptorSet (device, pctx->pool, layouts);
+
 	for (size_t i = 0; i < frames; i++) {
 		__auto_type pframe = &pctx->frames.a[i];

+		pframe->curDescriptors = sets->a[i * 3 + 0];
+		pframe->inDescriptors  = sets->a[i * 3 + 1];
+		pframe->newDescriptors = sets->a[i * 3 + 2];
+
 		DARRAY_INIT (&pframe->cmdSet, QFV_particleNumPasses);
 		DARRAY_RESIZE (&pframe->cmdSet, QFV_particleNumPasses);
 		pframe->cmdSet.grow = 0;
@ -156,7 +218,18 @@ Vulkan_Particles_Init (vulkan_ctx_t *ctx)
 								 va (ctx->va_ctx, "cmd:particle:%zd:%s", i,
 									 particle_pass_names[j]));
 		}
+
+		VkEventCreateInfo event = { VK_STRUCTURE_TYPE_EVENT_CREATE_INFO };
+		dfunc->vkCreateEvent (device->dev, &event, 0, &pframe->physicsEvent);
+		dfunc->vkCreateEvent (device->dev, &event, 0, &pframe->updateEvent);
+		QFV_duSetObjectName (device, VK_OBJECT_TYPE_EVENT,
+							 pframe->physicsEvent,
+							 va (ctx->va_ctx, "event:particle:physics:%zd", i));
+		QFV_duSetObjectName (device, VK_OBJECT_TYPE_EVENT,
+							 pframe->updateEvent,
+							 va (ctx->va_ctx, "event:particle:update:%zd", i));
 	}
+	free (sets);
 	create_buffers (ctx);
 	qfvPopDebug (ctx);
 }
@ -167,16 +240,17 @@ Vulkan_Particles_Shutdown (vulkan_ctx_t *ctx)
 	qfv_device_t *device = ctx->device;
 	qfv_devfuncs_t *dfunc = device->funcs;
 	particlectx_t *pctx = ctx->particle_context;
+	size_t      frames = ctx->frames.size;

-	for (size_t i = 0; i < pctx->frames.size; i++) {
+	for (size_t i = 0; i < frames; i++) {
 		__auto_type pframe = &pctx->frames.a[i];
-		free (pframe->cmdSet.a);
-		dfunc->vkDestroyBuffer (device->dev, pframe->state, 0);
-		dfunc->vkDestroyBuffer (device->dev, pframe->params, 0);
-		dfunc->vkDestroyBuffer (device->dev, pframe->system, 0);
+		dfunc->vkDestroyEvent (device->dev, pframe->updateEvent, 0);
+		dfunc->vkDestroyEvent (device->dev, pframe->physicsEvent, 0);
 	}
-	dfunc->vkFreeMemory (device->dev, pctx->memory, 0);
+
 	QFV_DestroyStagingBuffer (pctx->stage);
+	QFV_DestroyResource (device, pctx->resources);
+	free (pctx->resources);

 	dfunc->vkDestroyPipeline (device->dev, pctx->physics, 0);
 	dfunc->vkDestroyPipeline (device->dev, pctx->update, 0);
@ -190,3 +264,125 @@ Vulkan_ParticleSystem (vulkan_ctx_t *ctx)
 {
 	return &ctx->particle_context->psystem;	//FIXME support more
 }
+
+static void
+particles_update (qfv_renderframe_t *rFrame)
+{
+	vulkan_ctx_t *ctx = rFrame->vulkan_ctx;
+	qfv_device_t *device = ctx->device;
+	qfv_devfuncs_t *dfunc = device->funcs;
+	particlectx_t *pctx = ctx->particle_context;
+	__auto_type pframe = &pctx->frames.a[ctx->curFrame];
+
+	qfv_packet_t *packet = QFV_PacketAcquire (pctx->stage);
+
+	__auto_type limits = &device->physDev->properties->limits;
+	VkMemoryRequirements req = {
+		.alignment = limits->minStorageBufferOffsetAlignment
+	};
+	uint32_t    numParticles = min (MaxParticles, pctx->psystem.numparticles);
+	size_t      syssize = sizeof (qfv_particle_system_t);
+	size_t      partoffs = QFV_NextOffset (syssize, &req);
+	size_t      partsize = sizeof (qfv_particle_t) * numParticles;
+	size_t      paramoffs = QFV_NextOffset (partoffs + partsize, &req);
+	size_t      paramsize = sizeof (qfv_parameters_t) * numParticles;
+	size_t      size = paramoffs + paramsize;
+
+	qfv_particle_system_t *system = QFV_PacketExtend (packet, size);
+	*system = (qfv_particle_system_t) {
+		.vertexCount = 1,
+		.particleCount = numParticles,
+	};
+	__auto_type particles = (qfv_particle_t *) ((byte *)system + partoffs);
+	memcpy (particles, pctx->psystem.particles, partsize);
+	qfv_parameters_t *params = (qfv_parameters_t *)((byte *)system + paramoffs);
+	memcpy (params, pctx->psystem.partparams, paramsize);
+
+	VkDescriptorBufferInfo bufferInfo[] = {
+		{ packet->stage->buffer, 0, syssize },
+		{ packet->stage->buffer, partoffs, partsize ? partsize : 1},
+		{ packet->stage->buffer, paramoffs, paramsize ? paramsize : 1},
+	};
+	VkWriteDescriptorSet write[] = {
+		{ VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET, 0,
+			pframe->newDescriptors, 0, 0, 3,
+			VK_DESCRIPTOR_TYPE_STORAGE_BUFFER,
+			.pBufferInfo = bufferInfo
+		},
+	};
+	dfunc->vkUpdateDescriptorSets (device->dev, 1, write, 0, 0);
+
+	dfunc->vkResetEvent (device->dev, pframe->updateEvent);
+	dfunc->vkResetEvent (device->dev, pframe->physicsEvent);
+
+	dfunc->vkCmdBindPipeline (packet->cmd, VK_PIPELINE_BIND_POINT_COMPUTE,
+							  pctx->update);
+	VkDescriptorSet set[3] = {
+		pframe->curDescriptors,
+		pframe->inDescriptors,
+		pframe->newDescriptors,
+	};
+	dfunc->vkCmdBindDescriptorSets (packet->cmd, VK_PIPELINE_BIND_POINT_COMPUTE,
+									pctx->update_layout, 0, 3, set, 0, 0);
+	dfunc->vkCmdDispatch (packet->cmd, 1, 1, 1);
+	dfunc->vkCmdSetEvent (packet->cmd, pframe->updateEvent,
+							VK_PIPELINE_STAGE_COMPUTE_SHADER_BIT);
+
+	VkBufferMemoryBarrier barrier[] = {
+		{ VK_STRUCTURE_TYPE_BUFFER_MEMORY_BARRIER, 0,
+			VK_ACCESS_SHADER_WRITE_BIT,
+			VK_ACCESS_SHADER_READ_BIT
+			| VK_ACCESS_SHADER_WRITE_BIT,
+			0, 0,
+			pframe->states, 0, VK_WHOLE_SIZE },
+		{ VK_STRUCTURE_TYPE_BUFFER_MEMORY_BARRIER, 0,
+			VK_ACCESS_SHADER_WRITE_BIT,
+			VK_ACCESS_SHADER_READ_BIT
+			| VK_ACCESS_SHADER_WRITE_BIT,
+			0, 0,
+			pframe->params, 0, VK_WHOLE_SIZE },
+		{ VK_STRUCTURE_TYPE_BUFFER_MEMORY_BARRIER, 0,
+			VK_ACCESS_SHADER_WRITE_BIT,
+			VK_ACCESS_SHADER_READ_BIT
+			| VK_ACCESS_SHADER_WRITE_BIT,
+			0, 0,
+			pframe->system, 0, VK_WHOLE_SIZE },
+	};
+	dfunc->vkCmdWaitEvents (packet->cmd, 1, &pframe->updateEvent,
+							VK_PIPELINE_STAGE_COMPUTE_SHADER_BIT,
+							VK_PIPELINE_STAGE_COMPUTE_SHADER_BIT,
+							0, 0,
+							3, barrier,
+							0, 0);
+	dfunc->vkCmdBindPipeline (packet->cmd, VK_PIPELINE_BIND_POINT_COMPUTE,
+							  pctx->physics);
+	dfunc->vkCmdBindDescriptorSets (packet->cmd, VK_PIPELINE_BIND_POINT_COMPUTE,
+									pctx->physics_layout, 0, 1, set, 0, 0);
+
+	particle_push_constants_t constants = {
+		.gravity = pctx->psystem.gravity,
+		.dT = vr_data.frametime,
+	};
+	qfv_push_constants_t push_constants[] = {
+		{ VK_SHADER_STAGE_COMPUTE_BIT,
+			field_offset (particle_push_constants_t, gravity),
+			sizeof (vec4f_t), &constants.gravity },
+		{ VK_SHADER_STAGE_COMPUTE_BIT,
+			field_offset (particle_push_constants_t, dT),
+			sizeof (float), &constants.dT },
+	};
+	QFV_PushConstants (device, packet->cmd, pctx->physics_layout,
+					   2, push_constants);
+	dfunc->vkCmdDispatch (packet->cmd, 8, 8, 8);
+	dfunc->vkCmdSetEvent (packet->cmd, pframe->physicsEvent,
+							VK_PIPELINE_STAGE_COMPUTE_SHADER_BIT);
+	QFV_PacketSubmit (packet);
+}
+
+void
+Vulkan_Particles_CreateRenderPasses (vulkan_ctx_t *ctx)
+{
+	__auto_type rp = QFV_RenderPass_New (ctx, "particles", particles_update);
+	rp->order = QFV_rp_particles;
+	DARRAY_APPEND (&ctx->renderPasses, rp);
+}
--- a/libs/video/renderer/vulkan/vulkan_vid_common.c
+++ b/libs/video/renderer/vulkan/vulkan_vid_common.c
@ -54,6 +54,7 @@
 #include "QF/Vulkan/qf_lighting.h"
 #include "QF/Vulkan/qf_main.h"
 #include "QF/Vulkan/qf_output.h"
+#include "QF/Vulkan/qf_particles.h"
 #include "QF/Vulkan/qf_renderpass.h"
 #include "QF/Vulkan/qf_vid.h"

@ -166,6 +167,7 @@ Vulkan_CreateRenderPasses (vulkan_ctx_t *ctx)
 {
 	Vulkan_Output_CreateRenderPasses (ctx);
 	Vulkan_Main_CreateRenderPasses (ctx);
+	Vulkan_Particles_CreateRenderPasses (ctx);
 	Vulkan_Lighting_CreateRenderPasses (ctx);

 	heapsort (ctx->renderPasses.a, ctx->renderPasses.size,