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}