99 lines
2.0 KiB
C
99 lines
2.0 KiB
C
// SPDX-License-Identifier: GPL-2.0 OR MIT
|
|
/* Copyright 2018-2019 Qiang Yu <yuq825@gmail.com> */
|
|
|
|
#include <linux/slab.h>
|
|
|
|
#include "lima_device.h"
|
|
#include "lima_ctx.h"
|
|
|
|
int lima_ctx_create(struct lima_device *dev, struct lima_ctx_mgr *mgr, u32 *id)
|
|
{
|
|
struct lima_ctx *ctx;
|
|
int i, err;
|
|
|
|
ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
|
|
if (!ctx)
|
|
return -ENOMEM;
|
|
ctx->dev = dev;
|
|
kref_init(&ctx->refcnt);
|
|
|
|
for (i = 0; i < lima_pipe_num; i++) {
|
|
err = lima_sched_context_init(dev->pipe + i, ctx->context + i, &ctx->guilty);
|
|
if (err)
|
|
goto err_out0;
|
|
}
|
|
|
|
err = xa_alloc(&mgr->handles, id, ctx, xa_limit_32b, GFP_KERNEL);
|
|
if (err < 0)
|
|
goto err_out0;
|
|
|
|
return 0;
|
|
|
|
err_out0:
|
|
for (i--; i >= 0; i--)
|
|
lima_sched_context_fini(dev->pipe + i, ctx->context + i);
|
|
kfree(ctx);
|
|
return err;
|
|
}
|
|
|
|
static void lima_ctx_do_release(struct kref *ref)
|
|
{
|
|
struct lima_ctx *ctx = container_of(ref, struct lima_ctx, refcnt);
|
|
int i;
|
|
|
|
for (i = 0; i < lima_pipe_num; i++)
|
|
lima_sched_context_fini(ctx->dev->pipe + i, ctx->context + i);
|
|
kfree(ctx);
|
|
}
|
|
|
|
int lima_ctx_free(struct lima_ctx_mgr *mgr, u32 id)
|
|
{
|
|
struct lima_ctx *ctx;
|
|
int ret = 0;
|
|
|
|
mutex_lock(&mgr->lock);
|
|
ctx = xa_erase(&mgr->handles, id);
|
|
if (ctx)
|
|
kref_put(&ctx->refcnt, lima_ctx_do_release);
|
|
else
|
|
ret = -EINVAL;
|
|
mutex_unlock(&mgr->lock);
|
|
return ret;
|
|
}
|
|
|
|
struct lima_ctx *lima_ctx_get(struct lima_ctx_mgr *mgr, u32 id)
|
|
{
|
|
struct lima_ctx *ctx;
|
|
|
|
mutex_lock(&mgr->lock);
|
|
ctx = xa_load(&mgr->handles, id);
|
|
if (ctx)
|
|
kref_get(&ctx->refcnt);
|
|
mutex_unlock(&mgr->lock);
|
|
return ctx;
|
|
}
|
|
|
|
void lima_ctx_put(struct lima_ctx *ctx)
|
|
{
|
|
kref_put(&ctx->refcnt, lima_ctx_do_release);
|
|
}
|
|
|
|
void lima_ctx_mgr_init(struct lima_ctx_mgr *mgr)
|
|
{
|
|
mutex_init(&mgr->lock);
|
|
xa_init_flags(&mgr->handles, XA_FLAGS_ALLOC);
|
|
}
|
|
|
|
void lima_ctx_mgr_fini(struct lima_ctx_mgr *mgr)
|
|
{
|
|
struct lima_ctx *ctx;
|
|
unsigned long id;
|
|
|
|
xa_for_each(&mgr->handles, id, ctx) {
|
|
kref_put(&ctx->refcnt, lima_ctx_do_release);
|
|
}
|
|
|
|
xa_destroy(&mgr->handles);
|
|
mutex_destroy(&mgr->lock);
|
|
}
|