1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright 2014 IBM Corp. 4 */ 5 6 #include <linux/debugfs.h> 7 #include <linux/kernel.h> 8 #include <linux/slab.h> 9 10 #include "cxl.h" 11 12 static struct dentry *cxl_debugfs; 13 14 /* Helpers to export CXL mmaped IO registers via debugfs */ 15 static int debugfs_io_u64_get(void *data, u64 *val) 16 { 17 *val = in_be64((u64 __iomem *)data); 18 return 0; 19 } 20 21 static int debugfs_io_u64_set(void *data, u64 val) 22 { 23 out_be64((u64 __iomem *)data, val); 24 return 0; 25 } 26 DEFINE_DEBUGFS_ATTRIBUTE(fops_io_x64, debugfs_io_u64_get, debugfs_io_u64_set, 27 "0x%016llx\n"); 28 29 static void debugfs_create_io_x64(const char *name, umode_t mode, 30 struct dentry *parent, u64 __iomem *value) 31 { 32 debugfs_create_file_unsafe(name, mode, parent, (void __force *)value, 33 &fops_io_x64); 34 } 35 36 void cxl_debugfs_add_adapter_regs_psl9(struct cxl *adapter, struct dentry *dir) 37 { 38 debugfs_create_io_x64("fir1", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL9_FIR1)); 39 debugfs_create_io_x64("fir_mask", 0400, dir, 40 _cxl_p1_addr(adapter, CXL_PSL9_FIR_MASK)); 41 debugfs_create_io_x64("fir_cntl", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL9_FIR_CNTL)); 42 debugfs_create_io_x64("trace", S_IRUSR | S_IWUSR, dir, _cxl_p1_addr(adapter, CXL_PSL9_TRACECFG)); 43 debugfs_create_io_x64("debug", 0600, dir, 44 _cxl_p1_addr(adapter, CXL_PSL9_DEBUG)); 45 debugfs_create_io_x64("xsl-debug", 0600, dir, 46 _cxl_p1_addr(adapter, CXL_XSL9_DBG)); 47 } 48 49 void cxl_debugfs_add_adapter_regs_psl8(struct cxl *adapter, struct dentry *dir) 50 { 51 debugfs_create_io_x64("fir1", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_FIR1)); 52 debugfs_create_io_x64("fir2", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_FIR2)); 53 debugfs_create_io_x64("fir_cntl", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_FIR_CNTL)); 54 debugfs_create_io_x64("trace", S_IRUSR | S_IWUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_TRACE)); 55 } 56 57 void cxl_debugfs_adapter_add(struct cxl *adapter) 58 { 59 struct dentry *dir; 60 char buf[32]; 61 62 if (!cxl_debugfs) 63 return; 64 65 snprintf(buf, 32, "card%i", adapter->adapter_num); 66 dir = debugfs_create_dir(buf, cxl_debugfs); 67 adapter->debugfs = dir; 68 69 debugfs_create_io_x64("err_ivte", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_ErrIVTE)); 70 71 if (adapter->native->sl_ops->debugfs_add_adapter_regs) 72 adapter->native->sl_ops->debugfs_add_adapter_regs(adapter, dir); 73 } 74 75 void cxl_debugfs_adapter_remove(struct cxl *adapter) 76 { 77 debugfs_remove_recursive(adapter->debugfs); 78 } 79 80 void cxl_debugfs_add_afu_regs_psl9(struct cxl_afu *afu, struct dentry *dir) 81 { 82 debugfs_create_io_x64("serr", S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_SERR_An)); 83 } 84 85 void cxl_debugfs_add_afu_regs_psl8(struct cxl_afu *afu, struct dentry *dir) 86 { 87 debugfs_create_io_x64("sstp0", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_SSTP0_An)); 88 debugfs_create_io_x64("sstp1", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_SSTP1_An)); 89 90 debugfs_create_io_x64("fir", S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_FIR_SLICE_An)); 91 debugfs_create_io_x64("serr", S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_SERR_An)); 92 debugfs_create_io_x64("afu_debug", S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_AFU_DEBUG_An)); 93 debugfs_create_io_x64("trace", S_IRUSR | S_IWUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_SLICE_TRACE)); 94 } 95 96 void cxl_debugfs_afu_add(struct cxl_afu *afu) 97 { 98 struct dentry *dir; 99 char buf[32]; 100 101 if (!afu->adapter->debugfs) 102 return; 103 104 snprintf(buf, 32, "psl%i.%i", afu->adapter->adapter_num, afu->slice); 105 dir = debugfs_create_dir(buf, afu->adapter->debugfs); 106 afu->debugfs = dir; 107 108 debugfs_create_io_x64("sr", S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_SR_An)); 109 debugfs_create_io_x64("dsisr", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_PSL_DSISR_An)); 110 debugfs_create_io_x64("dar", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_PSL_DAR_An)); 111 112 debugfs_create_io_x64("err_status", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_PSL_ErrStat_An)); 113 114 if (afu->adapter->native->sl_ops->debugfs_add_afu_regs) 115 afu->adapter->native->sl_ops->debugfs_add_afu_regs(afu, dir); 116 } 117 118 void cxl_debugfs_afu_remove(struct cxl_afu *afu) 119 { 120 debugfs_remove_recursive(afu->debugfs); 121 } 122 123 void __init cxl_debugfs_init(void) 124 { 125 if (!cpu_has_feature(CPU_FTR_HVMODE)) 126 return; 127 128 cxl_debugfs = debugfs_create_dir("cxl", NULL); 129 } 130 131 void cxl_debugfs_exit(void) 132 { 133 debugfs_remove_recursive(cxl_debugfs); 134 } 135