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 } 108