1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
|
// 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;
ctx->pid = task_pid_nr(current);
get_task_comm(ctx->pname, current);
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);
}
|
