1 // SPDX-License-Identifier: GPL-2.0 2 /* Copyright (C) 2012-2018 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 struct cc_debugfs_ctx { 12 struct dentry *dir; 13 }; 14 15 #define CC_DEBUG_REG(_X) { \ 16 .name = __stringify(_X),\ 17 .offset = CC_REG(_X) \ 18 } 19 20 /* 21 * This is a global var for the dentry of the 22 * debugfs ccree/ dir. It is not tied down to 23 * a specific instance of ccree, hence it is 24 * global. 25 */ 26 static struct dentry *cc_debugfs_dir; 27 28 static struct debugfs_reg32 debug_regs[] = { 29 CC_DEBUG_REG(HOST_SIGNATURE), 30 CC_DEBUG_REG(HOST_IRR), 31 CC_DEBUG_REG(HOST_POWER_DOWN_EN), 32 CC_DEBUG_REG(AXIM_MON_ERR), 33 CC_DEBUG_REG(DSCRPTR_QUEUE_CONTENT), 34 CC_DEBUG_REG(HOST_IMR), 35 CC_DEBUG_REG(AXIM_CFG), 36 CC_DEBUG_REG(AXIM_CACHE_PARAMS), 37 CC_DEBUG_REG(HOST_VERSION), 38 CC_DEBUG_REG(GPR_HOST), 39 CC_DEBUG_REG(AXIM_MON_COMP), 40 }; 41 42 int __init cc_debugfs_global_init(void) 43 { 44 cc_debugfs_dir = debugfs_create_dir("ccree", NULL); 45 46 return !cc_debugfs_dir; 47 } 48 49 void __exit cc_debugfs_global_fini(void) 50 { 51 debugfs_remove(cc_debugfs_dir); 52 } 53 54 int cc_debugfs_init(struct cc_drvdata *drvdata) 55 { 56 struct device *dev = drvdata_to_dev(drvdata); 57 struct cc_debugfs_ctx *ctx; 58 struct debugfs_regset32 *regset; 59 struct dentry *file; 60 61 ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL); 62 if (!ctx) 63 return -ENOMEM; 64 65 regset = devm_kzalloc(dev, sizeof(*regset), GFP_KERNEL); 66 if (!regset) 67 return -ENOMEM; 68 69 regset->regs = debug_regs; 70 regset->nregs = ARRAY_SIZE(debug_regs); 71 regset->base = drvdata->cc_base; 72 73 ctx->dir = debugfs_create_dir(drvdata->plat_dev->name, cc_debugfs_dir); 74 if (!ctx->dir) 75 return -ENFILE; 76 77 file = debugfs_create_regset32("regs", 0400, ctx->dir, regset); 78 if (!file) { 79 debugfs_remove(ctx->dir); 80 return -ENFILE; 81 } 82 83 file = debugfs_create_bool("coherent", 0400, ctx->dir, 84 &drvdata->coherent); 85 86 if (!file) { 87 debugfs_remove_recursive(ctx->dir); 88 return -ENFILE; 89 } 90 91 drvdata->debugfs = ctx; 92 93 return 0; 94 } 95 96 void cc_debugfs_fini(struct cc_drvdata *drvdata) 97 { 98 struct cc_debugfs_ctx *ctx = (struct cc_debugfs_ctx *)drvdata->debugfs; 99 100 debugfs_remove_recursive(ctx->dir); 101 } 102