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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
12static struct dentry *cxl_debugfs;
13
14/* Helpers to export CXL mmaped IO registers via debugfs */
15static int debugfs_io_u64_get(void *data, u64 *val)
16{
17 *val = in_be64((u64 __iomem *)data);
18 return 0;
19}
20
21static int debugfs_io_u64_set(void *data, u64 val)
22{
23 out_be64((u64 __iomem *)data, val);
24 return 0;
25}
26DEFINE_DEBUGFS_ATTRIBUTE(fops_io_x64, debugfs_io_u64_get, debugfs_io_u64_set,
27 "0x%016llx\n");
28
29static 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
36void 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
49void 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
57void 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
75void cxl_debugfs_adapter_remove(struct cxl *adapter)
76{
77 debugfs_remove_recursive(adapter->debugfs);
78}
79
80void 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
85void 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
96void 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
118void cxl_debugfs_afu_remove(struct cxl_afu *afu)
119{
120 debugfs_remove_recursive(afu->debugfs);
121}
122
123void __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
131void cxl_debugfs_exit(void)
132{
133 debugfs_remove_recursive(cxl_debugfs);
134}
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_DEBUGFS_ATTRIBUTE(fops_io_x64, debugfs_io_u64_get, debugfs_io_u64_set,
47 "0x%016llx\n");
48
49static 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
56void 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
64void 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
69int 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
90void cxl_debugfs_adapter_remove(struct cxl *adapter)
91{
92 debugfs_remove_recursive(adapter->debugfs);
93}
94
95void 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
103int 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
130void cxl_debugfs_afu_remove(struct cxl_afu *afu)
131{
132 debugfs_remove_recursive(afu->debugfs);
133}
134
135int __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
150void cxl_debugfs_exit(void)
151{
152 debugfs_remove_recursive(cxl_debugfs);
153}