1a1d2a633SQiang Yu // SPDX-License-Identifier: GPL-2.0 OR MIT
2a1d2a633SQiang Yu /* Copyright 2018-2019 Qiang Yu <yuq825@gmail.com> */
3a1d2a633SQiang Yu
4a1d2a633SQiang Yu #include <linux/slab.h>
5a1d2a633SQiang Yu
6a1d2a633SQiang Yu #include "lima_device.h"
7a1d2a633SQiang Yu #include "lima_ctx.h"
8a1d2a633SQiang Yu
lima_ctx_create(struct lima_device * dev,struct lima_ctx_mgr * mgr,u32 * id)9a1d2a633SQiang Yu int lima_ctx_create(struct lima_device *dev, struct lima_ctx_mgr *mgr, u32 *id)
10a1d2a633SQiang Yu {
11a1d2a633SQiang Yu struct lima_ctx *ctx;
12a1d2a633SQiang Yu int i, err;
13a1d2a633SQiang Yu
14a1d2a633SQiang Yu ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
15a1d2a633SQiang Yu if (!ctx)
16a1d2a633SQiang Yu return -ENOMEM;
17a1d2a633SQiang Yu ctx->dev = dev;
18a1d2a633SQiang Yu kref_init(&ctx->refcnt);
19a1d2a633SQiang Yu
20a1d2a633SQiang Yu for (i = 0; i < lima_pipe_num; i++) {
21a1d2a633SQiang Yu err = lima_sched_context_init(dev->pipe + i, ctx->context + i, &ctx->guilty);
22a1d2a633SQiang Yu if (err)
23a1d2a633SQiang Yu goto err_out0;
24a1d2a633SQiang Yu }
25a1d2a633SQiang Yu
2614d2bd53SDave Airlie err = xa_alloc(&mgr->handles, id, ctx, xa_limit_32b, GFP_KERNEL);
27a1d2a633SQiang Yu if (err < 0)
28a1d2a633SQiang Yu goto err_out0;
29a1d2a633SQiang Yu
306ebd24b6SQiang Yu ctx->pid = task_pid_nr(current);
316ebd24b6SQiang Yu get_task_comm(ctx->pname, current);
326ebd24b6SQiang Yu
33a1d2a633SQiang Yu return 0;
34a1d2a633SQiang Yu
35a1d2a633SQiang Yu err_out0:
36a1d2a633SQiang Yu for (i--; i >= 0; i--)
37a1d2a633SQiang Yu lima_sched_context_fini(dev->pipe + i, ctx->context + i);
38a1d2a633SQiang Yu kfree(ctx);
39a1d2a633SQiang Yu return err;
40a1d2a633SQiang Yu }
41a1d2a633SQiang Yu
lima_ctx_do_release(struct kref * ref)42a1d2a633SQiang Yu static void lima_ctx_do_release(struct kref *ref)
43a1d2a633SQiang Yu {
44a1d2a633SQiang Yu struct lima_ctx *ctx = container_of(ref, struct lima_ctx, refcnt);
45a1d2a633SQiang Yu int i;
46a1d2a633SQiang Yu
47*8678c8b3SQiang Yu for (i = 0; i < lima_pipe_num; i++)
48a1d2a633SQiang Yu lima_sched_context_fini(ctx->dev->pipe + i, ctx->context + i);
49a1d2a633SQiang Yu kfree(ctx);
50a1d2a633SQiang Yu }
51a1d2a633SQiang Yu
lima_ctx_free(struct lima_ctx_mgr * mgr,u32 id)52a1d2a633SQiang Yu int lima_ctx_free(struct lima_ctx_mgr *mgr, u32 id)
53a1d2a633SQiang Yu {
54a1d2a633SQiang Yu struct lima_ctx *ctx;
55a1d2a633SQiang Yu int ret = 0;
56a1d2a633SQiang Yu
57a1d2a633SQiang Yu mutex_lock(&mgr->lock);
58a1d2a633SQiang Yu ctx = xa_erase(&mgr->handles, id);
59a1d2a633SQiang Yu if (ctx)
60a1d2a633SQiang Yu kref_put(&ctx->refcnt, lima_ctx_do_release);
61a1d2a633SQiang Yu else
62a1d2a633SQiang Yu ret = -EINVAL;
63a1d2a633SQiang Yu mutex_unlock(&mgr->lock);
64a1d2a633SQiang Yu return ret;
65a1d2a633SQiang Yu }
66a1d2a633SQiang Yu
lima_ctx_get(struct lima_ctx_mgr * mgr,u32 id)67a1d2a633SQiang Yu struct lima_ctx *lima_ctx_get(struct lima_ctx_mgr *mgr, u32 id)
68a1d2a633SQiang Yu {
69a1d2a633SQiang Yu struct lima_ctx *ctx;
70a1d2a633SQiang Yu
71a1d2a633SQiang Yu mutex_lock(&mgr->lock);
72a1d2a633SQiang Yu ctx = xa_load(&mgr->handles, id);
73a1d2a633SQiang Yu if (ctx)
74a1d2a633SQiang Yu kref_get(&ctx->refcnt);
75a1d2a633SQiang Yu mutex_unlock(&mgr->lock);
76a1d2a633SQiang Yu return ctx;
77a1d2a633SQiang Yu }
78a1d2a633SQiang Yu
lima_ctx_put(struct lima_ctx * ctx)79a1d2a633SQiang Yu void lima_ctx_put(struct lima_ctx *ctx)
80a1d2a633SQiang Yu {
81a1d2a633SQiang Yu kref_put(&ctx->refcnt, lima_ctx_do_release);
82a1d2a633SQiang Yu }
83a1d2a633SQiang Yu
lima_ctx_mgr_init(struct lima_ctx_mgr * mgr)84a1d2a633SQiang Yu void lima_ctx_mgr_init(struct lima_ctx_mgr *mgr)
85a1d2a633SQiang Yu {
86a1d2a633SQiang Yu mutex_init(&mgr->lock);
87a1d2a633SQiang Yu xa_init_flags(&mgr->handles, XA_FLAGS_ALLOC);
88a1d2a633SQiang Yu }
89a1d2a633SQiang Yu
lima_ctx_mgr_fini(struct lima_ctx_mgr * mgr)90a1d2a633SQiang Yu void lima_ctx_mgr_fini(struct lima_ctx_mgr *mgr)
91a1d2a633SQiang Yu {
92a1d2a633SQiang Yu struct lima_ctx *ctx;
93a1d2a633SQiang Yu unsigned long id;
94a1d2a633SQiang Yu
95a1d2a633SQiang Yu xa_for_each(&mgr->handles, id, ctx) {
96a1d2a633SQiang Yu kref_put(&ctx->refcnt, lima_ctx_do_release);
97a1d2a633SQiang Yu }
98a1d2a633SQiang Yu
99a1d2a633SQiang Yu xa_destroy(&mgr->handles);
100a1d2a633SQiang Yu mutex_destroy(&mgr->lock);
101a1d2a633SQiang Yu }
102