1 /* 2 * Copyright 2014 IBM Corp. 3 * 4 * This program is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU General Public License 6 * as published by the Free Software Foundation; either version 7 * 2 of the License, or (at your option) any later version. 8 */ 9 10 #include <linux/debugfs.h> 11 #include <linux/kernel.h> 12 #include <linux/slab.h> 13 14 #include "cxl.h" 15 16 static struct dentry *cxl_debugfs; 17 18 /* Helpers to export CXL mmaped IO registers via debugfs */ 19 static int debugfs_io_u64_get(void *data, u64 *val) 20 { 21 *val = in_be64((u64 __iomem *)data); 22 return 0; 23 } 24 25 static int debugfs_io_u64_set(void *data, u64 val) 26 { 27 out_be64((u64 __iomem *)data, val); 28 return 0; 29 } 30 DEFINE_DEBUGFS_ATTRIBUTE(fops_io_x64, debugfs_io_u64_get, debugfs_io_u64_set, 31 "0x%016llx\n"); 32 33 static struct dentry *debugfs_create_io_x64(const char *name, umode_t mode, 34 struct dentry *parent, u64 __iomem *value) 35 { 36 return debugfs_create_file_unsafe(name, mode, parent, 37 (void __force *)value, &fops_io_x64); 38 } 39 40 void cxl_debugfs_add_adapter_regs_psl9(struct cxl *adapter, struct dentry *dir) 41 { 42 debugfs_create_io_x64("fir1", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL9_FIR1)); 43 debugfs_create_io_x64("fir_mask", 0400, dir, 44 _cxl_p1_addr(adapter, CXL_PSL9_FIR_MASK)); 45 debugfs_create_io_x64("fir_cntl", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL9_FIR_CNTL)); 46 debugfs_create_io_x64("trace", S_IRUSR | S_IWUSR, dir, _cxl_p1_addr(adapter, CXL_PSL9_TRACECFG)); 47 debugfs_create_io_x64("debug", 0600, dir, 48 _cxl_p1_addr(adapter, CXL_PSL9_DEBUG)); 49 debugfs_create_io_x64("xsl-debug", 0600, dir, 50 _cxl_p1_addr(adapter, CXL_XSL9_DBG)); 51 } 52 53 void cxl_debugfs_add_adapter_regs_psl8(struct cxl *adapter, struct dentry *dir) 54 { 55 debugfs_create_io_x64("fir1", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_FIR1)); 56 debugfs_create_io_x64("fir2", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_FIR2)); 57 debugfs_create_io_x64("fir_cntl", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_FIR_CNTL)); 58 debugfs_create_io_x64("trace", S_IRUSR | S_IWUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_TRACE)); 59 } 60 61 int cxl_debugfs_adapter_add(struct cxl *adapter) 62 { 63 struct dentry *dir; 64 char buf[32]; 65 66 if (!cxl_debugfs) 67 return -ENODEV; 68 69 snprintf(buf, 32, "card%i", adapter->adapter_num); 70 dir = debugfs_create_dir(buf, cxl_debugfs); 71 if (IS_ERR(dir)) 72 return PTR_ERR(dir); 73 adapter->debugfs = dir; 74 75 debugfs_create_io_x64("err_ivte", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_ErrIVTE)); 76 77 if (adapter->native->sl_ops->debugfs_add_adapter_regs) 78 adapter->native->sl_ops->debugfs_add_adapter_regs(adapter, dir); 79 return 0; 80 } 81 82 void cxl_debugfs_adapter_remove(struct cxl *adapter) 83 { 84 debugfs_remove_recursive(adapter->debugfs); 85 } 86 87 void cxl_debugfs_add_afu_regs_psl9(struct cxl_afu *afu, struct dentry *dir) 88 { 89 debugfs_create_io_x64("serr", S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_SERR_An)); 90 } 91 92 void cxl_debugfs_add_afu_regs_psl8(struct cxl_afu *afu, struct dentry *dir) 93 { 94 debugfs_create_io_x64("sstp0", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_SSTP0_An)); 95 debugfs_create_io_x64("sstp1", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_SSTP1_An)); 96 97 debugfs_create_io_x64("fir", S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_FIR_SLICE_An)); 98 debugfs_create_io_x64("serr", S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_SERR_An)); 99 debugfs_create_io_x64("afu_debug", S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_AFU_DEBUG_An)); 100 debugfs_create_io_x64("trace", S_IRUSR | S_IWUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_SLICE_TRACE)); 101 } 102 103 int cxl_debugfs_afu_add(struct cxl_afu *afu) 104 { 105 struct dentry *dir; 106 char buf[32]; 107 108 if (!afu->adapter->debugfs) 109 return -ENODEV; 110 111 snprintf(buf, 32, "psl%i.%i", afu->adapter->adapter_num, afu->slice); 112 dir = debugfs_create_dir(buf, afu->adapter->debugfs); 113 if (IS_ERR(dir)) 114 return PTR_ERR(dir); 115 afu->debugfs = dir; 116 117 debugfs_create_io_x64("sr", S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_SR_An)); 118 debugfs_create_io_x64("dsisr", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_PSL_DSISR_An)); 119 debugfs_create_io_x64("dar", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_PSL_DAR_An)); 120 121 debugfs_create_io_x64("err_status", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_PSL_ErrStat_An)); 122 123 if (afu->adapter->native->sl_ops->debugfs_add_afu_regs) 124 afu->adapter->native->sl_ops->debugfs_add_afu_regs(afu, dir); 125 126 return 0; 127 } 128 129 void cxl_debugfs_afu_remove(struct cxl_afu *afu) 130 { 131 debugfs_remove_recursive(afu->debugfs); 132 } 133 134 int __init cxl_debugfs_init(void) 135 { 136 struct dentry *ent; 137 138 if (!cpu_has_feature(CPU_FTR_HVMODE)) 139 return 0; 140 141 ent = debugfs_create_dir("cxl", NULL); 142 if (IS_ERR(ent)) 143 return PTR_ERR(ent); 144 cxl_debugfs = ent; 145 146 return 0; 147 } 148 149 void cxl_debugfs_exit(void) 150 { 151 debugfs_remove_recursive(cxl_debugfs); 152 } 153