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 void cxl_stop_trace_psl9(struct cxl *adapter) 19 { 20 /* Stop the trace */ 21 cxl_p1_write(adapter, CXL_PSL9_TRACECFG, 0x4480000000000000ULL); 22 } 23 24 void cxl_stop_trace_psl8(struct cxl *adapter) 25 { 26 int slice; 27 28 /* Stop the trace */ 29 cxl_p1_write(adapter, CXL_PSL_TRACE, 0x8000000000000017LL); 30 31 /* Stop the slice traces */ 32 spin_lock(&adapter->afu_list_lock); 33 for (slice = 0; slice < adapter->slices; slice++) { 34 if (adapter->afu[slice]) 35 cxl_p1n_write(adapter->afu[slice], CXL_PSL_SLICE_TRACE, 0x8000000000000000LL); 36 } 37 spin_unlock(&adapter->afu_list_lock); 38 } 39 40 /* Helpers to export CXL mmaped IO registers via debugfs */ 41 static int debugfs_io_u64_get(void *data, u64 *val) 42 { 43 *val = in_be64((u64 __iomem *)data); 44 return 0; 45 } 46 47 static int debugfs_io_u64_set(void *data, u64 val) 48 { 49 out_be64((u64 __iomem *)data, val); 50 return 0; 51 } 52 DEFINE_DEBUGFS_ATTRIBUTE(fops_io_x64, debugfs_io_u64_get, debugfs_io_u64_set, 53 "0x%016llx\n"); 54 55 static struct dentry *debugfs_create_io_x64(const char *name, umode_t mode, 56 struct dentry *parent, u64 __iomem *value) 57 { 58 return debugfs_create_file_unsafe(name, mode, parent, 59 (void __force *)value, &fops_io_x64); 60 } 61 62 void cxl_debugfs_add_adapter_regs_psl9(struct cxl *adapter, struct dentry *dir) 63 { 64 debugfs_create_io_x64("fir1", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL9_FIR1)); 65 debugfs_create_io_x64("fir2", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL9_FIR2)); 66 debugfs_create_io_x64("fir_cntl", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL9_FIR_CNTL)); 67 debugfs_create_io_x64("trace", S_IRUSR | S_IWUSR, dir, _cxl_p1_addr(adapter, CXL_PSL9_TRACECFG)); 68 } 69 70 void cxl_debugfs_add_adapter_regs_psl8(struct cxl *adapter, struct dentry *dir) 71 { 72 debugfs_create_io_x64("fir1", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_FIR1)); 73 debugfs_create_io_x64("fir2", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_FIR2)); 74 debugfs_create_io_x64("fir_cntl", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_FIR_CNTL)); 75 debugfs_create_io_x64("trace", S_IRUSR | S_IWUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_TRACE)); 76 } 77 78 void cxl_debugfs_add_adapter_regs_xsl(struct cxl *adapter, struct dentry *dir) 79 { 80 debugfs_create_io_x64("fec", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_XSL_FEC)); 81 } 82 83 int cxl_debugfs_adapter_add(struct cxl *adapter) 84 { 85 struct dentry *dir; 86 char buf[32]; 87 88 if (!cxl_debugfs) 89 return -ENODEV; 90 91 snprintf(buf, 32, "card%i", adapter->adapter_num); 92 dir = debugfs_create_dir(buf, cxl_debugfs); 93 if (IS_ERR(dir)) 94 return PTR_ERR(dir); 95 adapter->debugfs = dir; 96 97 debugfs_create_io_x64("err_ivte", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_ErrIVTE)); 98 99 if (adapter->native->sl_ops->debugfs_add_adapter_regs) 100 adapter->native->sl_ops->debugfs_add_adapter_regs(adapter, dir); 101 return 0; 102 } 103 104 void cxl_debugfs_adapter_remove(struct cxl *adapter) 105 { 106 debugfs_remove_recursive(adapter->debugfs); 107 } 108 109 void cxl_debugfs_add_afu_regs_psl9(struct cxl_afu *afu, struct dentry *dir) 110 { 111 debugfs_create_io_x64("serr", S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_SERR_An)); 112 } 113 114 void cxl_debugfs_add_afu_regs_psl8(struct cxl_afu *afu, struct dentry *dir) 115 { 116 debugfs_create_io_x64("sstp0", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_SSTP0_An)); 117 debugfs_create_io_x64("sstp1", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_SSTP1_An)); 118 119 debugfs_create_io_x64("fir", S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_FIR_SLICE_An)); 120 debugfs_create_io_x64("serr", S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_SERR_An)); 121 debugfs_create_io_x64("afu_debug", S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_AFU_DEBUG_An)); 122 debugfs_create_io_x64("trace", S_IRUSR | S_IWUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_SLICE_TRACE)); 123 } 124 125 int cxl_debugfs_afu_add(struct cxl_afu *afu) 126 { 127 struct dentry *dir; 128 char buf[32]; 129 130 if (!afu->adapter->debugfs) 131 return -ENODEV; 132 133 snprintf(buf, 32, "psl%i.%i", afu->adapter->adapter_num, afu->slice); 134 dir = debugfs_create_dir(buf, afu->adapter->debugfs); 135 if (IS_ERR(dir)) 136 return PTR_ERR(dir); 137 afu->debugfs = dir; 138 139 debugfs_create_io_x64("sr", S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_SR_An)); 140 debugfs_create_io_x64("dsisr", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_PSL_DSISR_An)); 141 debugfs_create_io_x64("dar", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_PSL_DAR_An)); 142 143 debugfs_create_io_x64("err_status", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_PSL_ErrStat_An)); 144 145 if (afu->adapter->native->sl_ops->debugfs_add_afu_regs) 146 afu->adapter->native->sl_ops->debugfs_add_afu_regs(afu, dir); 147 148 return 0; 149 } 150 151 void cxl_debugfs_afu_remove(struct cxl_afu *afu) 152 { 153 debugfs_remove_recursive(afu->debugfs); 154 } 155 156 int __init cxl_debugfs_init(void) 157 { 158 struct dentry *ent; 159 160 if (!cpu_has_feature(CPU_FTR_HVMODE)) 161 return 0; 162 163 ent = debugfs_create_dir("cxl", NULL); 164 if (IS_ERR(ent)) 165 return PTR_ERR(ent); 166 cxl_debugfs = ent; 167 168 return 0; 169 } 170 171 void cxl_debugfs_exit(void) 172 { 173 debugfs_remove_recursive(cxl_debugfs); 174 } 175