Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1// SPDX-License-Identifier: GPL-2.0
2/* Copyright (C) 2012-2018 ARM Limited or its affiliates. */
3
4#include <linux/kernel.h>
5#include <linux/debugfs.h>
6#include <linux/stringify.h>
7#include "cc_driver.h"
8#include "cc_crypto_ctx.h"
9#include "cc_debugfs.h"
10
11struct cc_debugfs_ctx {
12 struct dentry *dir;
13};
14
15#define CC_DEBUG_REG(_X) { \
16 .name = __stringify(_X),\
17 .offset = CC_REG(_X) \
18 }
19
20/*
21 * This is a global var for the dentry of the
22 * debugfs ccree/ dir. It is not tied down to
23 * a specific instance of ccree, hence it is
24 * global.
25 */
26static struct dentry *cc_debugfs_dir;
27
28static struct debugfs_reg32 debug_regs[] = {
29 { .name = "SIGNATURE" }, /* Must be 0th */
30 { .name = "VERSION" }, /* Must be 1st */
31 CC_DEBUG_REG(HOST_IRR),
32 CC_DEBUG_REG(HOST_POWER_DOWN_EN),
33 CC_DEBUG_REG(AXIM_MON_ERR),
34 CC_DEBUG_REG(DSCRPTR_QUEUE_CONTENT),
35 CC_DEBUG_REG(HOST_IMR),
36 CC_DEBUG_REG(AXIM_CFG),
37 CC_DEBUG_REG(AXIM_CACHE_PARAMS),
38 CC_DEBUG_REG(GPR_HOST),
39 CC_DEBUG_REG(AXIM_MON_COMP),
40};
41
42void __init cc_debugfs_global_init(void)
43{
44 cc_debugfs_dir = debugfs_create_dir("ccree", NULL);
45}
46
47void __exit cc_debugfs_global_fini(void)
48{
49 debugfs_remove(cc_debugfs_dir);
50}
51
52int cc_debugfs_init(struct cc_drvdata *drvdata)
53{
54 struct device *dev = drvdata_to_dev(drvdata);
55 struct cc_debugfs_ctx *ctx;
56 struct debugfs_regset32 *regset;
57
58 debug_regs[0].offset = drvdata->sig_offset;
59 debug_regs[1].offset = drvdata->ver_offset;
60
61 ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
62 if (!ctx)
63 return -ENOMEM;
64
65 regset = devm_kzalloc(dev, sizeof(*regset), GFP_KERNEL);
66 if (!regset)
67 return -ENOMEM;
68
69 regset->regs = debug_regs;
70 regset->nregs = ARRAY_SIZE(debug_regs);
71 regset->base = drvdata->cc_base;
72
73 ctx->dir = debugfs_create_dir(drvdata->plat_dev->name, cc_debugfs_dir);
74
75 debugfs_create_regset32("regs", 0400, ctx->dir, regset);
76 debugfs_create_bool("coherent", 0400, ctx->dir, &drvdata->coherent);
77
78 drvdata->debugfs = ctx;
79
80 return 0;
81}
82
83void cc_debugfs_fini(struct cc_drvdata *drvdata)
84{
85 struct cc_debugfs_ctx *ctx = (struct cc_debugfs_ctx *)drvdata->debugfs;
86
87 debugfs_remove_recursive(ctx->dir);
88}