drivers/crypto/ccree/cc_debugfs.c

   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  */
  22 static struct dentry *cc_debugfs_dir;
  23
  24 static struct debugfs_reg32 ver_sig_regs[] = {
  25         { .name = "SIGNATURE" }, /* Must be 0th */
  26         { .name = "VERSION" }, /* Must be 1st */
  27 };
  28
  29 static 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
  41 static 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
  53 void __init cc_debugfs_global_init(void)
  54 {
  55         cc_debugfs_dir = debugfs_create_dir("ccree", NULL);
  56 }
  57
  58 void cc_debugfs_global_fini(void)
  59 {
  60         debugfs_remove(cc_debugfs_dir);
  61 }
  62
  63 int 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
 104 void cc_debugfs_fini(struct cc_drvdata *drvdata)
 105 {
 106         debugfs_remove_recursive(drvdata->dir);
 107 }