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/*
* Copyright 2021 Google LLC
* SPDX-License-Identifier: MIT
*/
#include "render_state.h"
#include <inttypes.h>
#ifdef ENABLE_RENDER_SERVER_WORKER_THREAD
#include "c11/threads.h"
#endif
#include "render_context.h"
#include "vkr_renderer.h"
/* Workers call into vkr renderer. When they are processes, not much care is
* required. But when workers are threads, we need to grab a lock to protect
* vkr renderer.
*/
struct render_state {
#ifdef ENABLE_RENDER_SERVER_WORKER_THREAD
/* protect renderer interface */
mtx_t renderer_mutex;
/* protect the below global states */
mtx_t state_mutex;
#endif
/* track and init/fini just once */
int init_count;
/* track the render_context */
struct list_head contexts;
};
struct render_state state = {
#ifdef ENABLE_RENDER_SERVER_WORKER_THREAD
.renderer_mutex = _MTX_INITIALIZER_NP,
.state_mutex = _MTX_INITIALIZER_NP,
#endif
.init_count = 0,
};
#ifdef ENABLE_RENDER_SERVER_WORKER_THREAD
static inline mtx_t *
render_state_lock(mtx_t *mtx)
{
mtx_lock(mtx);
return mtx;
}
static void
render_state_unlock(mtx_t **mtx)
{
mtx_unlock(*mtx);
}
#define SCOPE_LOCK_STATE() \
mtx_t *_state_mtx __attribute__((cleanup(render_state_unlock), unused)) = \
render_state_lock(&state.state_mutex)
#define SCOPE_LOCK_RENDERER() \
mtx_t *_renderer_mtx __attribute__((cleanup(render_state_unlock), unused)) = \
render_state_lock(&state.renderer_mutex)
#else
#define SCOPE_LOCK_STATE()
#define SCOPE_LOCK_RENDERER()
#endif /* ENABLE_RENDER_SERVER_WORKER_THREAD */
static struct render_context *
render_state_lookup_context(uint32_t ctx_id)
{
struct render_context *ctx = NULL;
SCOPE_LOCK_STATE();
#ifdef ENABLE_RENDER_SERVER_WORKER_THREAD
list_for_each_entry (struct render_context, iter, &state.contexts, head) {
if (iter->ctx_id == ctx_id) {
ctx = iter;
break;
}
}
#else
assert(list_is_singular(&state.contexts));
ctx = list_first_entry(&state.contexts, struct render_context, head);
assert(ctx->ctx_id == ctx_id);
(void)ctx_id;
#endif
return ctx;
}
static void
render_state_cb_debug_logger(const char *fmt, va_list ap)
{
char buf[1024];
vsnprintf(buf, sizeof(buf), fmt, ap);
render_log(buf);
}
static void
render_state_cb_retire_fence(uint32_t ctx_id, uint32_t ring_idx, uint64_t fence_id)
{
struct render_context *ctx = render_state_lookup_context(ctx_id);
assert(ctx);
const uint32_t seqno = (uint32_t)fence_id;
render_context_update_timeline(ctx, ring_idx, seqno);
}
static const struct vkr_renderer_callbacks render_state_cbs = {
.debug_logger = render_state_cb_debug_logger,
.retire_fence = render_state_cb_retire_fence,
};
static void
render_state_add_context(struct render_context *ctx)
{
SCOPE_LOCK_STATE();
list_addtail(&ctx->head, &state.contexts);
}
static void
render_state_remove_context(struct render_context *ctx)
{
SCOPE_LOCK_STATE();
list_del(&ctx->head);
}
void
render_state_fini(void)
{
SCOPE_LOCK_STATE();
if (state.init_count) {
state.init_count--;
if (!state.init_count)
vkr_renderer_fini();
}
}
bool
render_state_init(uint32_t init_flags)
{
static const uint32_t required_flags = VIRGL_RENDERER_VENUS | VIRGL_RENDERER_NO_VIRGL;
if ((init_flags & required_flags) != required_flags)
return false;
SCOPE_LOCK_STATE();
if (!state.init_count) {
/* always use sync thread and async fence cb for low latency */
static const uint32_t vkr_flags =
VKR_RENDERER_THREAD_SYNC | VKR_RENDERER_ASYNC_FENCE_CB;
if (!vkr_renderer_init(vkr_flags, &render_state_cbs))
return false;
list_inithead(&state.contexts);
}
state.init_count++;
return true;
}
bool
render_state_create_context(struct render_context *ctx,
uint32_t flags,
uint32_t name_len,
const char *name)
{
{
SCOPE_LOCK_RENDERER();
if (!vkr_renderer_create_context(ctx->ctx_id, flags, name_len, name))
return false;
}
render_state_add_context(ctx);
return true;
}
void
render_state_destroy_context(uint32_t ctx_id)
{
struct render_context *ctx = render_state_lookup_context(ctx_id);
if (!ctx)
return;
{
SCOPE_LOCK_RENDERER();
vkr_renderer_destroy_context(ctx_id);
}
render_state_remove_context(ctx);
}
bool
render_state_submit_cmd(uint32_t ctx_id, void *cmd, uint32_t size)
{
SCOPE_LOCK_RENDERER();
return vkr_renderer_submit_cmd(ctx_id, cmd, size);
}
bool
render_state_submit_fence(uint32_t ctx_id,
uint32_t flags,
uint64_t ring_idx,
uint64_t fence_id)
{
SCOPE_LOCK_RENDERER();
return vkr_renderer_submit_fence(ctx_id, flags, ring_idx, fence_id);
}
bool
render_state_create_resource(uint32_t ctx_id,
uint32_t res_id,
uint64_t blob_id,
uint64_t blob_size,
uint32_t blob_flags,
enum virgl_resource_fd_type *out_fd_type,
int *out_res_fd,
uint32_t *out_map_info,
struct virgl_resource_vulkan_info *out_vulkan_info)
{
SCOPE_LOCK_RENDERER();
return vkr_renderer_create_resource(ctx_id, res_id, blob_id, blob_size, blob_flags,
out_fd_type, out_res_fd, out_map_info,
out_vulkan_info);
}
bool
render_state_import_resource(uint32_t ctx_id,
uint32_t res_id,
enum virgl_resource_fd_type fd_type,
int fd,
uint64_t size)
{
SCOPE_LOCK_RENDERER();
return vkr_renderer_import_resource(ctx_id, res_id, fd_type, fd, size);
}
void
render_state_destroy_resource(uint32_t ctx_id, uint32_t res_id)
{
SCOPE_LOCK_RENDERER();
vkr_renderer_destroy_resource(ctx_id, res_id);
}
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