forked from mirrors/linux
1a143cdde4
Fix a typo in debugfs interface error path which can result in a panic following a memory allocation failure. Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
118 lines
2.9 KiB
C
118 lines
2.9 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright (C) 2012-2019 ARM Limited or its affiliates. */
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#include <linux/kernel.h>
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#include <linux/debugfs.h>
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#include <linux/stringify.h>
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#include "cc_driver.h"
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#include "cc_crypto_ctx.h"
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#include "cc_debugfs.h"
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struct cc_debugfs_ctx {
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struct dentry *dir;
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};
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#define CC_DEBUG_REG(_X) { \
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.name = __stringify(_X),\
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.offset = CC_REG(_X) \
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}
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/*
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* This is a global var for the dentry of the
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* debugfs ccree/ dir. It is not tied down to
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* a specific instance of ccree, hence it is
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* global.
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*/
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static struct dentry *cc_debugfs_dir;
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static struct debugfs_reg32 ver_sig_regs[] = {
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{ .name = "SIGNATURE" }, /* Must be 0th */
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{ .name = "VERSION" }, /* Must be 1st */
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};
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static struct debugfs_reg32 pid_cid_regs[] = {
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CC_DEBUG_REG(PERIPHERAL_ID_0),
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CC_DEBUG_REG(PERIPHERAL_ID_1),
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CC_DEBUG_REG(PERIPHERAL_ID_2),
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CC_DEBUG_REG(PERIPHERAL_ID_3),
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CC_DEBUG_REG(PERIPHERAL_ID_4),
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CC_DEBUG_REG(COMPONENT_ID_0),
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CC_DEBUG_REG(COMPONENT_ID_1),
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CC_DEBUG_REG(COMPONENT_ID_2),
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CC_DEBUG_REG(COMPONENT_ID_3),
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};
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static struct debugfs_reg32 debug_regs[] = {
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CC_DEBUG_REG(HOST_IRR),
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CC_DEBUG_REG(HOST_POWER_DOWN_EN),
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CC_DEBUG_REG(AXIM_MON_ERR),
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CC_DEBUG_REG(DSCRPTR_QUEUE_CONTENT),
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CC_DEBUG_REG(HOST_IMR),
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CC_DEBUG_REG(AXIM_CFG),
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CC_DEBUG_REG(AXIM_CACHE_PARAMS),
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CC_DEBUG_REG(GPR_HOST),
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CC_DEBUG_REG(AXIM_MON_COMP),
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};
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void __init cc_debugfs_global_init(void)
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{
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cc_debugfs_dir = debugfs_create_dir("ccree", NULL);
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}
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void __exit cc_debugfs_global_fini(void)
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{
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debugfs_remove(cc_debugfs_dir);
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}
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int cc_debugfs_init(struct cc_drvdata *drvdata)
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{
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struct device *dev = drvdata_to_dev(drvdata);
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struct cc_debugfs_ctx *ctx;
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struct debugfs_regset32 *regset, *verset;
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ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
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if (!ctx)
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return -ENOMEM;
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regset = devm_kzalloc(dev, sizeof(*regset), GFP_KERNEL);
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if (!regset)
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return -ENOMEM;
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regset->regs = debug_regs;
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regset->nregs = ARRAY_SIZE(debug_regs);
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regset->base = drvdata->cc_base;
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ctx->dir = debugfs_create_dir(drvdata->plat_dev->name, cc_debugfs_dir);
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debugfs_create_regset32("regs", 0400, ctx->dir, regset);
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debugfs_create_bool("coherent", 0400, ctx->dir, &drvdata->coherent);
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verset = devm_kzalloc(dev, sizeof(*verset), GFP_KERNEL);
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/* Failing here is not important enough to fail the module load */
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if (!verset)
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goto out;
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if (drvdata->hw_rev <= CC_HW_REV_712) {
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ver_sig_regs[0].offset = drvdata->sig_offset;
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ver_sig_regs[1].offset = drvdata->ver_offset;
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verset->regs = ver_sig_regs;
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verset->nregs = ARRAY_SIZE(ver_sig_regs);
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} else {
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verset->regs = pid_cid_regs;
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verset->nregs = ARRAY_SIZE(pid_cid_regs);
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}
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verset->base = drvdata->cc_base;
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debugfs_create_regset32("version", 0400, ctx->dir, verset);
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out:
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drvdata->debugfs = ctx;
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return 0;
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}
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void cc_debugfs_fini(struct cc_drvdata *drvdata)
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{
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struct cc_debugfs_ctx *ctx = (struct cc_debugfs_ctx *)drvdata->debugfs;
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debugfs_remove_recursive(ctx->dir);
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}
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