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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 99 100 101 102 103 104 | // SPDX-License-Identifier: GPL-2.0
/* Copyright (C) 2012-2018 ARM Limited or its affiliates. */
#include <linux/kernel.h>
#include <linux/debugfs.h>
#include <linux/stringify.h>
#include "cc_driver.h"
#include "cc_crypto_ctx.h"
#include "cc_debugfs.h"
struct cc_debugfs_ctx {
struct dentry *dir;
};
#define CC_DEBUG_REG(_X) { \
.name = __stringify(_X),\
.offset = CC_REG(_X) \
}
/*
* This is a global var for the dentry of the
* debugfs ccree/ dir. It is not tied down to
* a specific instance of ccree, hence it is
* global.
*/
static struct dentry *cc_debugfs_dir;
static struct debugfs_reg32 debug_regs[] = {
{ .name = "SIGNATURE" }, /* Must be 0th */
{ .name = "VERSION" }, /* Must be 1st */
CC_DEBUG_REG(HOST_IRR),
CC_DEBUG_REG(HOST_POWER_DOWN_EN),
CC_DEBUG_REG(AXIM_MON_ERR),
CC_DEBUG_REG(DSCRPTR_QUEUE_CONTENT),
CC_DEBUG_REG(HOST_IMR),
CC_DEBUG_REG(AXIM_CFG),
CC_DEBUG_REG(AXIM_CACHE_PARAMS),
CC_DEBUG_REG(GPR_HOST),
CC_DEBUG_REG(AXIM_MON_COMP),
};
int __init cc_debugfs_global_init(void)
{
cc_debugfs_dir = debugfs_create_dir("ccree", NULL);
return !cc_debugfs_dir;
}
void __exit cc_debugfs_global_fini(void)
{
debugfs_remove(cc_debugfs_dir);
}
int cc_debugfs_init(struct cc_drvdata *drvdata)
{
struct device *dev = drvdata_to_dev(drvdata);
struct cc_debugfs_ctx *ctx;
struct debugfs_regset32 *regset;
struct dentry *file;
debug_regs[0].offset = drvdata->sig_offset;
debug_regs[1].offset = drvdata->ver_offset;
ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
if (!ctx)
return -ENOMEM;
regset = devm_kzalloc(dev, sizeof(*regset), GFP_KERNEL);
if (!regset)
return -ENOMEM;
regset->regs = debug_regs;
regset->nregs = ARRAY_SIZE(debug_regs);
regset->base = drvdata->cc_base;
ctx->dir = debugfs_create_dir(drvdata->plat_dev->name, cc_debugfs_dir);
if (!ctx->dir)
return -ENFILE;
file = debugfs_create_regset32("regs", 0400, ctx->dir, regset);
if (!file) {
debugfs_remove(ctx->dir);
return -ENFILE;
}
file = debugfs_create_bool("coherent", 0400, ctx->dir,
&drvdata->coherent);
if (!file) {
debugfs_remove_recursive(ctx->dir);
return -ENFILE;
}
drvdata->debugfs = ctx;
return 0;
}
void cc_debugfs_fini(struct cc_drvdata *drvdata)
{
struct cc_debugfs_ctx *ctx = (struct cc_debugfs_ctx *)drvdata->debugfs;
debugfs_remove_recursive(ctx->dir);
}
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