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f204e0b8 IM |
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 *)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 | } |