1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Copyright 2014 IBM Corp.
6 #include <linux/debugfs.h>
7 #include <linux/kernel.h>
8 #include <linux/slab.h>
12 static struct dentry *cxl_debugfs;
14 /* Helpers to export CXL mmaped IO registers via debugfs */
15 static int debugfs_io_u64_get(void *data, u64 *val)
17 *val = in_be64((u64 __iomem *)data);
21 static int debugfs_io_u64_set(void *data, u64 val)
23 out_be64((u64 __iomem *)data, val);
26 DEFINE_DEBUGFS_ATTRIBUTE(fops_io_x64, debugfs_io_u64_get, debugfs_io_u64_set,
29 static struct dentry *debugfs_create_io_x64(const char *name, umode_t mode,
30 struct dentry *parent, u64 __iomem *value)
32 return debugfs_create_file_unsafe(name, mode, parent,
33 (void __force *)value, &fops_io_x64);
36 void cxl_debugfs_add_adapter_regs_psl9(struct cxl *adapter, struct dentry *dir)
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));
49 void cxl_debugfs_add_adapter_regs_psl8(struct cxl *adapter, struct dentry *dir)
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));
57 int cxl_debugfs_adapter_add(struct cxl *adapter)
65 snprintf(buf, 32, "card%i", adapter->adapter_num);
66 dir = debugfs_create_dir(buf, cxl_debugfs);
69 adapter->debugfs = dir;
71 debugfs_create_io_x64("err_ivte", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_ErrIVTE));
73 if (adapter->native->sl_ops->debugfs_add_adapter_regs)
74 adapter->native->sl_ops->debugfs_add_adapter_regs(adapter, dir);
78 void cxl_debugfs_adapter_remove(struct cxl *adapter)
80 debugfs_remove_recursive(adapter->debugfs);
83 void cxl_debugfs_add_afu_regs_psl9(struct cxl_afu *afu, struct dentry *dir)
85 debugfs_create_io_x64("serr", S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_SERR_An));
88 void cxl_debugfs_add_afu_regs_psl8(struct cxl_afu *afu, struct dentry *dir)
90 debugfs_create_io_x64("sstp0", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_SSTP0_An));
91 debugfs_create_io_x64("sstp1", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_SSTP1_An));
93 debugfs_create_io_x64("fir", S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_FIR_SLICE_An));
94 debugfs_create_io_x64("serr", S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_SERR_An));
95 debugfs_create_io_x64("afu_debug", S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_AFU_DEBUG_An));
96 debugfs_create_io_x64("trace", S_IRUSR | S_IWUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_SLICE_TRACE));
99 int cxl_debugfs_afu_add(struct cxl_afu *afu)
104 if (!afu->adapter->debugfs)
107 snprintf(buf, 32, "psl%i.%i", afu->adapter->adapter_num, afu->slice);
108 dir = debugfs_create_dir(buf, afu->adapter->debugfs);
113 debugfs_create_io_x64("sr", S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_SR_An));
114 debugfs_create_io_x64("dsisr", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_PSL_DSISR_An));
115 debugfs_create_io_x64("dar", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_PSL_DAR_An));
117 debugfs_create_io_x64("err_status", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_PSL_ErrStat_An));
119 if (afu->adapter->native->sl_ops->debugfs_add_afu_regs)
120 afu->adapter->native->sl_ops->debugfs_add_afu_regs(afu, dir);
125 void cxl_debugfs_afu_remove(struct cxl_afu *afu)
127 debugfs_remove_recursive(afu->debugfs);
130 int __init cxl_debugfs_init(void)
134 if (!cpu_has_feature(CPU_FTR_HVMODE))
137 ent = debugfs_create_dir("cxl", NULL);
145 void cxl_debugfs_exit(void)
147 debugfs_remove_recursive(cxl_debugfs);