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(struct cxl *adapter) 19 { 20 int slice; 21 22 /* Stop the trace */ 23 cxl_p1_write(adapter, CXL_PSL_TRACE, 0x8000000000000017LL); 24 25 /* Stop the slice traces */ 26 spin_lock(&adapter->afu_list_lock); 27 for (slice = 0; slice < adapter->slices; slice++) { 28 if (adapter->afu[slice]) 29 cxl_p1n_write(adapter->afu[slice], CXL_PSL_SLICE_TRACE, 0x8000000000000000LL); 30 } 31 spin_unlock(&adapter->afu_list_lock); 32 } 33 34 /* Helpers to export CXL mmaped IO registers via debugfs */ 35 static int debugfs_io_u64_get(void *data, u64 *val) 36 { 37 *val = in_be64((u64 __iomem *)data); 38 return 0; 39 } 40 41 static int debugfs_io_u64_set(void *data, u64 val) 42 { 43 out_be64((u64 __iomem *)data, val); 44 return 0; 45 } 46 DEFINE_DEBUGFS_ATTRIBUTE(fops_io_x64, debugfs_io_u64_get, debugfs_io_u64_set, 47 "0x%016llx\n"); 48 49 static struct dentry *debugfs_create_io_x64(const char *name, umode_t mode, 50 struct dentry *parent, u64 __iomem *value) 51 { 52 return debugfs_create_file_unsafe(name, mode, parent, 53 (void __force *)value, &fops_io_x64); 54 } 55 56 void cxl_debugfs_add_adapter_psl_regs(struct cxl *adapter, struct dentry *dir) 57 { 58 debugfs_create_io_x64("fir1", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_FIR1)); 59 debugfs_create_io_x64("fir2", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_FIR2)); 60 debugfs_create_io_x64("fir_cntl", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_FIR_CNTL)); 61 debugfs_create_io_x64("trace", S_IRUSR | S_IWUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_TRACE)); 62 } 63 64 void cxl_debugfs_add_adapter_xsl_regs(struct cxl *adapter, struct dentry *dir) 65 { 66 debugfs_create_io_x64("fec", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_XSL_FEC)); 67 } 68 69 int cxl_debugfs_adapter_add(struct cxl *adapter) 70 { 71 struct dentry *dir; 72 char buf[32]; 73 74 if (!cxl_debugfs) 75 return -ENODEV; 76 77 snprintf(buf, 32, "card%i", adapter->adapter_num); 78 dir = debugfs_create_dir(buf, cxl_debugfs); 79 if (IS_ERR(dir)) 80 return PTR_ERR(dir); 81 adapter->debugfs = dir; 82 83 debugfs_create_io_x64("err_ivte", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_ErrIVTE)); 84 85 if (adapter->native->sl_ops->debugfs_add_adapter_sl_regs) 86 adapter->native->sl_ops->debugfs_add_adapter_sl_regs(adapter, dir); 87 return 0; 88 } 89 90 void cxl_debugfs_adapter_remove(struct cxl *adapter) 91 { 92 debugfs_remove_recursive(adapter->debugfs); 93 } 94 95 void cxl_debugfs_add_afu_psl_regs(struct cxl_afu *afu, struct dentry *dir) 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 debugfs_create_io_x64("sstp0", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_SSTP0_An)); 121 debugfs_create_io_x64("sstp1", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_SSTP1_An)); 122 debugfs_create_io_x64("err_status", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_PSL_ErrStat_An)); 123 124 if (afu->adapter->native->sl_ops->debugfs_add_afu_sl_regs) 125 afu->adapter->native->sl_ops->debugfs_add_afu_sl_regs(afu, dir); 126 127 return 0; 128 } 129 130 void cxl_debugfs_afu_remove(struct cxl_afu *afu) 131 { 132 debugfs_remove_recursive(afu->debugfs); 133 } 134 135 int __init cxl_debugfs_init(void) 136 { 137 struct dentry *ent; 138 139 if (!cpu_has_feature(CPU_FTR_HVMODE)) 140 return 0; 141 142 ent = debugfs_create_dir("cxl", NULL); 143 if (IS_ERR(ent)) 144 return PTR_ERR(ent); 145 cxl_debugfs = ent; 146 147 return 0; 148 } 149 150 void cxl_debugfs_exit(void) 151 { 152 debugfs_remove_recursive(cxl_debugfs); 153 } 154