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 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 ver_sig_regs[] = { 29 { .name = "SIGNATURE" }, /* Must be 0th */ 30 { .name = "VERSION" }, /* Must be 1st */ 31 }; 32 33 static struct debugfs_reg32 pid_cid_regs[] = { 34 CC_DEBUG_REG(PERIPHERAL_ID_0), 35 CC_DEBUG_REG(PERIPHERAL_ID_1), 36 CC_DEBUG_REG(PERIPHERAL_ID_2), 37 CC_DEBUG_REG(PERIPHERAL_ID_3), 38 CC_DEBUG_REG(PERIPHERAL_ID_4), 39 CC_DEBUG_REG(COMPONENT_ID_0), 40 CC_DEBUG_REG(COMPONENT_ID_1), 41 CC_DEBUG_REG(COMPONENT_ID_2), 42 CC_DEBUG_REG(COMPONENT_ID_3), 43 }; 44 45 static struct debugfs_reg32 debug_regs[] = { 46 CC_DEBUG_REG(HOST_IRR), 47 CC_DEBUG_REG(HOST_POWER_DOWN_EN), 48 CC_DEBUG_REG(AXIM_MON_ERR), 49 CC_DEBUG_REG(DSCRPTR_QUEUE_CONTENT), 50 CC_DEBUG_REG(HOST_IMR), 51 CC_DEBUG_REG(AXIM_CFG), 52 CC_DEBUG_REG(AXIM_CACHE_PARAMS), 53 CC_DEBUG_REG(GPR_HOST), 54 CC_DEBUG_REG(AXIM_MON_COMP), 55 }; 56 57 void __init cc_debugfs_global_init(void) 58 { 59 cc_debugfs_dir = debugfs_create_dir("ccree", NULL); 60 } 61 62 void __exit cc_debugfs_global_fini(void) 63 { 64 debugfs_remove(cc_debugfs_dir); 65 } 66 67 int cc_debugfs_init(struct cc_drvdata *drvdata) 68 { 69 struct device *dev = drvdata_to_dev(drvdata); 70 struct cc_debugfs_ctx *ctx; 71 struct debugfs_regset32 *regset, *verset; 72 73 ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL); 74 if (!ctx) 75 return -ENOMEM; 76 77 regset = devm_kzalloc(dev, sizeof(*regset), GFP_KERNEL); 78 if (!regset) 79 return -ENOMEM; 80 81 regset->regs = debug_regs; 82 regset->nregs = ARRAY_SIZE(debug_regs); 83 regset->base = drvdata->cc_base; 84 85 ctx->dir = debugfs_create_dir(drvdata->plat_dev->name, cc_debugfs_dir); 86 87 debugfs_create_regset32("regs", 0400, ctx->dir, regset); 88 debugfs_create_bool("coherent", 0400, ctx->dir, &drvdata->coherent); 89 90 verset = devm_kzalloc(dev, sizeof(*verset), GFP_KERNEL); 91 /* Failing here is not important enough to fail the module load */ 92 if (!regset) 93 goto out; 94 95 if (drvdata->hw_rev <= CC_HW_REV_712) { 96 ver_sig_regs[0].offset = drvdata->sig_offset; 97 ver_sig_regs[1].offset = drvdata->ver_offset; 98 verset->regs = ver_sig_regs; 99 verset->nregs = ARRAY_SIZE(ver_sig_regs); 100 } else { 101 verset->regs = pid_cid_regs; 102 verset->nregs = ARRAY_SIZE(pid_cid_regs); 103 } 104 verset->base = drvdata->cc_base; 105 106 debugfs_create_regset32("version", 0400, ctx->dir, verset); 107 108 out: 109 drvdata->debugfs = ctx; 110 return 0; 111 } 112 113 void cc_debugfs_fini(struct cc_drvdata *drvdata) 114 { 115 struct cc_debugfs_ctx *ctx = (struct cc_debugfs_ctx *)drvdata->debugfs; 116 117 debugfs_remove_recursive(ctx->dir); 118 } 119