Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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
16static struct dentry *cxl_debugfs;
17
18void 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 */
35static int debugfs_io_u64_get(void *data, u64 *val)
36{
37 *val = in_be64((u64 __iomem *)data);
38 return 0;
39}
40
41static int debugfs_io_u64_set(void *data, u64 val)
42{
43 out_be64((u64 __iomem *)data, val);
44 return 0;
45}
46DEFINE_SIMPLE_ATTRIBUTE(fops_io_x64, debugfs_io_u64_get, debugfs_io_u64_set, "0x%016llx\n");
47
48static 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
54void cxl_debugfs_add_adapter_psl_regs(struct cxl *adapter, struct dentry *dir)
55{
56 debugfs_create_io_x64("fir1", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_FIR1));
57 debugfs_create_io_x64("fir2", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_FIR2));
58 debugfs_create_io_x64("fir_cntl", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_FIR_CNTL));
59 debugfs_create_io_x64("trace", S_IRUSR | S_IWUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_TRACE));
60}
61
62void cxl_debugfs_add_adapter_xsl_regs(struct cxl *adapter, struct dentry *dir)
63{
64 debugfs_create_io_x64("fec", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_XSL_FEC));
65}
66
67int cxl_debugfs_adapter_add(struct cxl *adapter)
68{
69 struct dentry *dir;
70 char buf[32];
71
72 if (!cxl_debugfs)
73 return -ENODEV;
74
75 snprintf(buf, 32, "card%i", adapter->adapter_num);
76 dir = debugfs_create_dir(buf, cxl_debugfs);
77 if (IS_ERR(dir))
78 return PTR_ERR(dir);
79 adapter->debugfs = dir;
80
81 debugfs_create_io_x64("err_ivte", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_ErrIVTE));
82
83 if (adapter->native->sl_ops->debugfs_add_adapter_sl_regs)
84 adapter->native->sl_ops->debugfs_add_adapter_sl_regs(adapter, dir);
85 return 0;
86}
87
88void cxl_debugfs_adapter_remove(struct cxl *adapter)
89{
90 debugfs_remove_recursive(adapter->debugfs);
91}
92
93void cxl_debugfs_add_afu_psl_regs(struct cxl_afu *afu, struct dentry *dir)
94{
95 debugfs_create_io_x64("fir", S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_FIR_SLICE_An));
96 debugfs_create_io_x64("serr", S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_SERR_An));
97 debugfs_create_io_x64("afu_debug", S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_AFU_DEBUG_An));
98 debugfs_create_io_x64("trace", S_IRUSR | S_IWUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_SLICE_TRACE));
99}
100
101int cxl_debugfs_afu_add(struct cxl_afu *afu)
102{
103 struct dentry *dir;
104 char buf[32];
105
106 if (!afu->adapter->debugfs)
107 return -ENODEV;
108
109 snprintf(buf, 32, "psl%i.%i", afu->adapter->adapter_num, afu->slice);
110 dir = debugfs_create_dir(buf, afu->adapter->debugfs);
111 if (IS_ERR(dir))
112 return PTR_ERR(dir);
113 afu->debugfs = dir;
114
115 debugfs_create_io_x64("sr", S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_SR_An));
116 debugfs_create_io_x64("dsisr", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_PSL_DSISR_An));
117 debugfs_create_io_x64("dar", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_PSL_DAR_An));
118 debugfs_create_io_x64("sstp0", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_SSTP0_An));
119 debugfs_create_io_x64("sstp1", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_SSTP1_An));
120 debugfs_create_io_x64("err_status", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_PSL_ErrStat_An));
121
122 if (afu->adapter->native->sl_ops->debugfs_add_afu_sl_regs)
123 afu->adapter->native->sl_ops->debugfs_add_afu_sl_regs(afu, dir);
124
125 return 0;
126}
127
128void cxl_debugfs_afu_remove(struct cxl_afu *afu)
129{
130 debugfs_remove_recursive(afu->debugfs);
131}
132
133int __init cxl_debugfs_init(void)
134{
135 struct dentry *ent;
136
137 if (!cpu_has_feature(CPU_FTR_HVMODE))
138 return 0;
139
140 ent = debugfs_create_dir("cxl", NULL);
141 if (IS_ERR(ent))
142 return PTR_ERR(ent);
143 cxl_debugfs = ent;
144
145 return 0;
146}
147
148void cxl_debugfs_exit(void)
149{
150 debugfs_remove_recursive(cxl_debugfs);
151}