crypto/ccree/cc_debugfs.c

0001 // SPDX-License-Identifier: GPL-2.0
0002 /* Copyright (C) 2012-2019 ARM Limited or its affiliates. */
0003
0004 #include <linux/kernel.h>
0005 #include <linux/debugfs.h>
0006 #include <linux/stringify.h>
0007 #include "cc_driver.h"
0008 #include "cc_crypto_ctx.h"
0009 #include "cc_debugfs.h"
0010
0011 #define CC_DEBUG_REG(_X) {  \
0012     .name = __stringify(_X),\
0013     .offset = CC_REG(_X)    \
0014     }
0015
0016 /*
0017  * This is a global var for the dentry of the
0018  * debugfs ccree/ dir. It is not tied down to
0019  * a specific instance of ccree, hence it is
0020  * global.
0021  */
0022 static struct dentry *cc_debugfs_dir;
0023
0024 static struct debugfs_reg32 ver_sig_regs[] = {
0025     { .name = "SIGNATURE" }, /* Must be 0th */
0026     { .name = "VERSION" }, /* Must be 1st */
0027 };
0028
0029 static const struct debugfs_reg32 pid_cid_regs[] = {
0030     CC_DEBUG_REG(PERIPHERAL_ID_0),
0031     CC_DEBUG_REG(PERIPHERAL_ID_1),
0032     CC_DEBUG_REG(PERIPHERAL_ID_2),
0033     CC_DEBUG_REG(PERIPHERAL_ID_3),
0034     CC_DEBUG_REG(PERIPHERAL_ID_4),
0035     CC_DEBUG_REG(COMPONENT_ID_0),
0036     CC_DEBUG_REG(COMPONENT_ID_1),
0037     CC_DEBUG_REG(COMPONENT_ID_2),
0038     CC_DEBUG_REG(COMPONENT_ID_3),
0039 };
0040
0041 static const struct debugfs_reg32 debug_regs[] = {
0042     CC_DEBUG_REG(HOST_IRR),
0043     CC_DEBUG_REG(HOST_POWER_DOWN_EN),
0044     CC_DEBUG_REG(AXIM_MON_ERR),
0045     CC_DEBUG_REG(DSCRPTR_QUEUE_CONTENT),
0046     CC_DEBUG_REG(HOST_IMR),
0047     CC_DEBUG_REG(AXIM_CFG),
0048     CC_DEBUG_REG(AXIM_CACHE_PARAMS),
0049     CC_DEBUG_REG(GPR_HOST),
0050     CC_DEBUG_REG(AXIM_MON_COMP),
0051 };
0052
0053 void __init cc_debugfs_global_init(void)
0054 {
0055     cc_debugfs_dir = debugfs_create_dir("ccree", NULL);
0056 }
0057
0058 void __exit cc_debugfs_global_fini(void)
0059 {
0060     debugfs_remove(cc_debugfs_dir);
0061 }
0062
0063 int cc_debugfs_init(struct cc_drvdata *drvdata)
0064 {
0065     struct device *dev = drvdata_to_dev(drvdata);
0066     struct debugfs_regset32 *regset, *verset;
0067
0068     regset = devm_kzalloc(dev, sizeof(*regset), GFP_KERNEL);
0069     if (!regset)
0070         return -ENOMEM;
0071
0072     regset->regs = debug_regs;
0073     regset->nregs = ARRAY_SIZE(debug_regs);
0074     regset->base = drvdata->cc_base;
0075     regset->dev = dev;
0076
0077     drvdata->dir = debugfs_create_dir(drvdata->plat_dev->name,
0078                       cc_debugfs_dir);
0079
0080     debugfs_create_regset32("regs", 0400, drvdata->dir, regset);
0081     debugfs_create_bool("coherent", 0400, drvdata->dir, &drvdata->coherent);
0082
0083     verset = devm_kzalloc(dev, sizeof(*verset), GFP_KERNEL);
0084     /* Failing here is not important enough to fail the module load */
0085     if (!verset)
0086         return 0;
0087
0088     if (drvdata->hw_rev <= CC_HW_REV_712) {
0089         ver_sig_regs[0].offset = drvdata->sig_offset;
0090         ver_sig_regs[1].offset = drvdata->ver_offset;
0091         verset->regs = ver_sig_regs;
0092         verset->nregs = ARRAY_SIZE(ver_sig_regs);
0093     } else {
0094         verset->regs = pid_cid_regs;
0095         verset->nregs = ARRAY_SIZE(pid_cid_regs);
0096     }
0097     verset->base = drvdata->cc_base;
0098     verset->dev = dev;
0099
0100     debugfs_create_regset32("version", 0400, drvdata->dir, verset);
0101     return 0;
0102 }
0103
0104 void cc_debugfs_fini(struct cc_drvdata *drvdata)
0105 {
0106     debugfs_remove_recursive(drvdata->dir);
0107 }