linux/drivers/crypto/ccree/cc_debugfs.c
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   1// SPDX-License-Identifier: GPL-2.0
   2/* Copyright (C) 2012-2019 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
  11#define CC_DEBUG_REG(_X) {      \
  12        .name = __stringify(_X),\
  13        .offset = CC_REG(_X)    \
  14        }
  15
  16/*
  17 * This is a global var for the dentry of the
  18 * debugfs ccree/ dir. It is not tied down to
  19 * a specific instance of ccree, hence it is
  20 * global.
  21 */
  22static struct dentry *cc_debugfs_dir;
  23
  24static struct debugfs_reg32 ver_sig_regs[] = {
  25        { .name = "SIGNATURE" }, /* Must be 0th */
  26        { .name = "VERSION" }, /* Must be 1st */
  27};
  28
  29static const struct debugfs_reg32 pid_cid_regs[] = {
  30        CC_DEBUG_REG(PERIPHERAL_ID_0),
  31        CC_DEBUG_REG(PERIPHERAL_ID_1),
  32        CC_DEBUG_REG(PERIPHERAL_ID_2),
  33        CC_DEBUG_REG(PERIPHERAL_ID_3),
  34        CC_DEBUG_REG(PERIPHERAL_ID_4),
  35        CC_DEBUG_REG(COMPONENT_ID_0),
  36        CC_DEBUG_REG(COMPONENT_ID_1),
  37        CC_DEBUG_REG(COMPONENT_ID_2),
  38        CC_DEBUG_REG(COMPONENT_ID_3),
  39};
  40
  41static const struct debugfs_reg32 debug_regs[] = {
  42        CC_DEBUG_REG(HOST_IRR),
  43        CC_DEBUG_REG(HOST_POWER_DOWN_EN),
  44        CC_DEBUG_REG(AXIM_MON_ERR),
  45        CC_DEBUG_REG(DSCRPTR_QUEUE_CONTENT),
  46        CC_DEBUG_REG(HOST_IMR),
  47        CC_DEBUG_REG(AXIM_CFG),
  48        CC_DEBUG_REG(AXIM_CACHE_PARAMS),
  49        CC_DEBUG_REG(GPR_HOST),
  50        CC_DEBUG_REG(AXIM_MON_COMP),
  51};
  52
  53void __init cc_debugfs_global_init(void)
  54{
  55        cc_debugfs_dir = debugfs_create_dir("ccree", NULL);
  56}
  57
  58void __exit cc_debugfs_global_fini(void)
  59{
  60        debugfs_remove(cc_debugfs_dir);
  61}
  62
  63int cc_debugfs_init(struct cc_drvdata *drvdata)
  64{
  65        struct device *dev = drvdata_to_dev(drvdata);
  66        struct debugfs_regset32 *regset, *verset;
  67
  68        regset = devm_kzalloc(dev, sizeof(*regset), GFP_KERNEL);
  69        if (!regset)
  70                return -ENOMEM;
  71
  72        regset->regs = debug_regs;
  73        regset->nregs = ARRAY_SIZE(debug_regs);
  74        regset->base = drvdata->cc_base;
  75        regset->dev = dev;
  76
  77        drvdata->dir = debugfs_create_dir(drvdata->plat_dev->name,
  78                                          cc_debugfs_dir);
  79
  80        debugfs_create_regset32("regs", 0400, drvdata->dir, regset);
  81        debugfs_create_bool("coherent", 0400, drvdata->dir, &drvdata->coherent);
  82
  83        verset = devm_kzalloc(dev, sizeof(*verset), GFP_KERNEL);
  84        /* Failing here is not important enough to fail the module load */
  85        if (!verset)
  86                return 0;
  87
  88        if (drvdata->hw_rev <= CC_HW_REV_712) {
  89                ver_sig_regs[0].offset = drvdata->sig_offset;
  90                ver_sig_regs[1].offset = drvdata->ver_offset;
  91                verset->regs = ver_sig_regs;
  92                verset->nregs = ARRAY_SIZE(ver_sig_regs);
  93        } else {
  94                verset->regs = pid_cid_regs;
  95                verset->nregs = ARRAY_SIZE(pid_cid_regs);
  96        }
  97        verset->base = drvdata->cc_base;
  98        verset->dev = dev;
  99
 100        debugfs_create_regset32("version", 0400, drvdata->dir, verset);
 101        return 0;
 102}
 103
 104void cc_debugfs_fini(struct cc_drvdata *drvdata)
 105{
 106        debugfs_remove_recursive(drvdata->dir);
 107}
 108