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_SIMPLE_ATTRIBUTE(fops_io_x64, debugfs_io_u64_get, debugfs_io_u64_set, "0x%016llx\n"); 47 48 static struct dentry *debugfs_create_io_x64(const char *name, umode_t mode, 49 struct dentry *parent, u64 __iomem *value) 50 { 51 return debugfs_create_file(name, mode, parent, (void __force *)value, &fops_io_x64); 52 } 53 54 int cxl_debugfs_adapter_add(struct cxl *adapter) 55 { 56 struct dentry *dir; 57 char buf[32]; 58 59 if (!cxl_debugfs) 60 return -ENODEV; 61 62 snprintf(buf, 32, "card%i", adapter->adapter_num); 63 dir = debugfs_create_dir(buf, cxl_debugfs); 64 if (IS_ERR(dir)) 65 return PTR_ERR(dir); 66 adapter->debugfs = dir; 67 68 debugfs_create_io_x64("fir1", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_FIR1)); 69 debugfs_create_io_x64("fir2", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_FIR2)); 70 debugfs_create_io_x64("fir_cntl", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_FIR_CNTL)); 71 debugfs_create_io_x64("err_ivte", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_ErrIVTE)); 72 73 debugfs_create_io_x64("trace", S_IRUSR | S_IWUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_TRACE)); 74 75 return 0; 76 } 77 78 void cxl_debugfs_adapter_remove(struct cxl *adapter) 79 { 80 debugfs_remove_recursive(adapter->debugfs); 81 } 82 83 int cxl_debugfs_afu_add(struct cxl_afu *afu) 84 { 85 struct dentry *dir; 86 char buf[32]; 87 88 if (!afu->adapter->debugfs) 89 return -ENODEV; 90 91 snprintf(buf, 32, "psl%i.%i", afu->adapter->adapter_num, afu->slice); 92 dir = debugfs_create_dir(buf, afu->adapter->debugfs); 93 if (IS_ERR(dir)) 94 return PTR_ERR(dir); 95 afu->debugfs = 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("sr", S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_SR_An)); 101 102 debugfs_create_io_x64("dsisr", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_PSL_DSISR_An)); 103 debugfs_create_io_x64("dar", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_PSL_DAR_An)); 104 debugfs_create_io_x64("sstp0", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_SSTP0_An)); 105 debugfs_create_io_x64("sstp1", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_SSTP1_An)); 106 debugfs_create_io_x64("err_status", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_PSL_ErrStat_An)); 107 108 debugfs_create_io_x64("trace", S_IRUSR | S_IWUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_SLICE_TRACE)); 109 110 return 0; 111 } 112 113 void cxl_debugfs_afu_remove(struct cxl_afu *afu) 114 { 115 debugfs_remove_recursive(afu->debugfs); 116 } 117 118 int __init cxl_debugfs_init(void) 119 { 120 struct dentry *ent; 121 ent = debugfs_create_dir("cxl", NULL); 122 if (IS_ERR(ent)) 123 return PTR_ERR(ent); 124 cxl_debugfs = ent; 125 126 return 0; 127 } 128 129 void cxl_debugfs_exit(void) 130 { 131 debugfs_remove_recursive(cxl_debugfs); 132 } 133