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