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("fir_mask", 0400, dir, 66 _cxl_p1_addr(adapter, CXL_PSL9_FIR_MASK)); 67 debugfs_create_io_x64("fir_cntl", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL9_FIR_CNTL)); 68 debugfs_create_io_x64("trace", S_IRUSR | S_IWUSR, dir, _cxl_p1_addr(adapter, CXL_PSL9_TRACECFG)); 69 } 70 71 void cxl_debugfs_add_adapter_regs_psl8(struct cxl *adapter, struct dentry *dir) 72 { 73 debugfs_create_io_x64("fir1", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_FIR1)); 74 debugfs_create_io_x64("fir2", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_FIR2)); 75 debugfs_create_io_x64("fir_cntl", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_FIR_CNTL)); 76 debugfs_create_io_x64("trace", S_IRUSR | S_IWUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_TRACE)); 77 } 78 79 void cxl_debugfs_add_adapter_regs_xsl(struct cxl *adapter, struct dentry *dir) 80 { 81 debugfs_create_io_x64("fec", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_XSL_FEC)); 82 } 83 84 int cxl_debugfs_adapter_add(struct cxl *adapter) 85 { 86 struct dentry *dir; 87 char buf[32]; 88 89 if (!cxl_debugfs) 90 return -ENODEV; 91 92 snprintf(buf, 32, "card%i", adapter->adapter_num); 93 dir = debugfs_create_dir(buf, cxl_debugfs); 94 if (IS_ERR(dir)) 95 return PTR_ERR(dir); 96 adapter->debugfs = dir; 97 98 debugfs_create_io_x64("err_ivte", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_ErrIVTE)); 99 100 if (adapter->native->sl_ops->debugfs_add_adapter_regs) 101 adapter->native->sl_ops->debugfs_add_adapter_regs(adapter, dir); 102 return 0; 103 } 104 105 void cxl_debugfs_adapter_remove(struct cxl *adapter) 106 { 107 debugfs_remove_recursive(adapter->debugfs); 108 } 109 110 void cxl_debugfs_add_afu_regs_psl9(struct cxl_afu *afu, struct dentry *dir) 111 { 112 debugfs_create_io_x64("serr", S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_SERR_An)); 113 } 114 115 void cxl_debugfs_add_afu_regs_psl8(struct cxl_afu *afu, struct dentry *dir) 116 { 117 debugfs_create_io_x64("sstp0", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_SSTP0_An)); 118 debugfs_create_io_x64("sstp1", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_SSTP1_An)); 119 120 debugfs_create_io_x64("fir", S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_FIR_SLICE_An)); 121 debugfs_create_io_x64("serr", S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_SERR_An)); 122 debugfs_create_io_x64("afu_debug", S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_AFU_DEBUG_An)); 123 debugfs_create_io_x64("trace", S_IRUSR | S_IWUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_SLICE_TRACE)); 124 } 125 126 int cxl_debugfs_afu_add(struct cxl_afu *afu) 127 { 128 struct dentry *dir; 129 char buf[32]; 130 131 if (!afu->adapter->debugfs) 132 return -ENODEV; 133 134 snprintf(buf, 32, "psl%i.%i", afu->adapter->adapter_num, afu->slice); 135 dir = debugfs_create_dir(buf, afu->adapter->debugfs); 136 if (IS_ERR(dir)) 137 return PTR_ERR(dir); 138 afu->debugfs = dir; 139 140 debugfs_create_io_x64("sr", S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_SR_An)); 141 debugfs_create_io_x64("dsisr", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_PSL_DSISR_An)); 142 debugfs_create_io_x64("dar", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_PSL_DAR_An)); 143 144 debugfs_create_io_x64("err_status", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_PSL_ErrStat_An)); 145 146 if (afu->adapter->native->sl_ops->debugfs_add_afu_regs) 147 afu->adapter->native->sl_ops->debugfs_add_afu_regs(afu, dir); 148 149 return 0; 150 } 151 152 void cxl_debugfs_afu_remove(struct cxl_afu *afu) 153 { 154 debugfs_remove_recursive(afu->debugfs); 155 } 156 157 int __init cxl_debugfs_init(void) 158 { 159 struct dentry *ent; 160 161 if (!cpu_has_feature(CPU_FTR_HVMODE)) 162 return 0; 163 164 ent = debugfs_create_dir("cxl", NULL); 165 if (IS_ERR(ent)) 166 return PTR_ERR(ent); 167 cxl_debugfs = ent; 168 169 return 0; 170 } 171 172 void cxl_debugfs_exit(void) 173 { 174 debugfs_remove_recursive(cxl_debugfs); 175 } 176