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2071a3e9 FV |
1 | /* |
2 | * Copyright (C) 2015 CERN (www.cern.ch) | |
3 | * Author: Federico Vaga <federico.vaga@cern.ch> | |
4 | * | |
5 | * Released according to the GNU GPL, version 2 or any later version. | |
6 | */ | |
7 | ||
8 | #include <linux/module.h> | |
9 | #include <linux/device.h> | |
10 | #include <linux/init.h> | |
11 | #include <linux/fs.h> | |
12 | #include <linux/debugfs.h> | |
13 | #include <linux/seq_file.h> | |
14 | #include <asm/byteorder.h> | |
15 | ||
16 | #include <linux/fmc.h> | |
17 | #include <linux/sdb.h> | |
18 | #include <linux/fmc-sdb.h> | |
19 | ||
20 | #define FMC_DBG_SDB_DUMP "dump_sdb" | |
21 | ||
22 | static char *__strip_trailing_space(char *buf, char *str, int len) | |
23 | { | |
24 | int i = len - 1; | |
25 | ||
26 | memcpy(buf, str, len); | |
27 | buf[len] = '\0'; | |
28 | while (i >= 0 && buf[i] == ' ') | |
29 | buf[i--] = '\0'; | |
30 | return buf; | |
31 | } | |
32 | ||
33 | #define __sdb_string(buf, field) ({ \ | |
34 | BUILD_BUG_ON(sizeof(buf) < sizeof(field)); \ | |
35 | __strip_trailing_space(buf, (void *)(field), sizeof(field)); \ | |
36 | }) | |
37 | ||
38 | /** | |
39 | * We do not check seq_printf() errors because we want to see things in any case | |
40 | */ | |
41 | static void fmc_sdb_dump_recursive(struct fmc_device *fmc, struct seq_file *s, | |
42 | const struct sdb_array *arr) | |
43 | { | |
44 | unsigned long base = arr->baseaddr; | |
45 | int i, j, n = arr->len, level = arr->level; | |
46 | char tmp[64]; | |
47 | ||
48 | for (i = 0; i < n; i++) { | |
49 | union sdb_record *r; | |
50 | struct sdb_product *p; | |
51 | struct sdb_component *c; | |
52 | ||
53 | r = &arr->record[i]; | |
54 | c = &r->dev.sdb_component; | |
55 | p = &c->product; | |
56 | ||
57 | for (j = 0; j < level; j++) | |
58 | seq_printf(s, " "); | |
59 | switch (r->empty.record_type) { | |
60 | case sdb_type_interconnect: | |
61 | seq_printf(s, "%08llx:%08x %.19s\n", | |
62 | __be64_to_cpu(p->vendor_id), | |
63 | __be32_to_cpu(p->device_id), | |
64 | p->name); | |
65 | break; | |
66 | case sdb_type_device: | |
67 | seq_printf(s, "%08llx:%08x %.19s (%08llx-%08llx)\n", | |
68 | __be64_to_cpu(p->vendor_id), | |
69 | __be32_to_cpu(p->device_id), | |
70 | p->name, | |
71 | __be64_to_cpu(c->addr_first) + base, | |
72 | __be64_to_cpu(c->addr_last) + base); | |
73 | break; | |
74 | case sdb_type_bridge: | |
75 | seq_printf(s, "%08llx:%08x %.19s (bridge: %08llx)\n", | |
76 | __be64_to_cpu(p->vendor_id), | |
77 | __be32_to_cpu(p->device_id), | |
78 | p->name, | |
79 | __be64_to_cpu(c->addr_first) + base); | |
80 | if (IS_ERR(arr->subtree[i])) { | |
81 | seq_printf(s, "SDB: (bridge error %li)\n", | |
82 | PTR_ERR(arr->subtree[i])); | |
83 | break; | |
84 | } | |
85 | fmc_sdb_dump_recursive(fmc, s, arr->subtree[i]); | |
86 | break; | |
87 | case sdb_type_integration: | |
88 | seq_printf(s, "integration\n"); | |
89 | break; | |
90 | case sdb_type_repo_url: | |
91 | seq_printf(s, "Synthesis repository: %s\n", | |
92 | __sdb_string(tmp, r->repo_url.repo_url)); | |
93 | break; | |
94 | case sdb_type_synthesis: | |
95 | seq_printf(s, "Bitstream '%s' ", | |
96 | __sdb_string(tmp, r->synthesis.syn_name)); | |
97 | seq_printf(s, "synthesized %08x by %s ", | |
98 | __be32_to_cpu(r->synthesis.date), | |
99 | __sdb_string(tmp, r->synthesis.user_name)); | |
100 | seq_printf(s, "(%s version %x), ", | |
101 | __sdb_string(tmp, r->synthesis.tool_name), | |
102 | __be32_to_cpu(r->synthesis.tool_version)); | |
103 | seq_printf(s, "commit %pm\n", | |
104 | r->synthesis.commit_id); | |
105 | break; | |
106 | case sdb_type_empty: | |
107 | seq_printf(s, "empty\n"); | |
108 | break; | |
109 | default: | |
110 | seq_printf(s, "UNKNOWN TYPE 0x%02x\n", | |
111 | r->empty.record_type); | |
112 | break; | |
113 | } | |
114 | } | |
115 | } | |
116 | ||
117 | static int fmc_sdb_dump(struct seq_file *s, void *offset) | |
118 | { | |
119 | struct fmc_device *fmc = s->private; | |
120 | ||
121 | if (!fmc->sdb) { | |
122 | seq_printf(s, "no SDB information\n"); | |
123 | return 0; | |
124 | } | |
125 | ||
126 | seq_printf(s, "FMC: %s (%s), slot %i, device %s\n", dev_name(fmc->hwdev), | |
127 | fmc->carrier_name, fmc->slot_id, dev_name(&fmc->dev)); | |
128 | /* Dump SDB information */ | |
129 | fmc_sdb_dump_recursive(fmc, s, fmc->sdb); | |
130 | ||
131 | return 0; | |
132 | } | |
133 | ||
134 | ||
135 | static int fmc_sdb_dump_open(struct inode *inode, struct file *file) | |
136 | { | |
137 | struct fmc_device *fmc = inode->i_private; | |
138 | ||
139 | return single_open(file, fmc_sdb_dump, fmc); | |
140 | } | |
141 | ||
142 | ||
143 | const struct file_operations fmc_dbgfs_sdb_dump = { | |
144 | .owner = THIS_MODULE, | |
145 | .open = fmc_sdb_dump_open, | |
146 | .read = seq_read, | |
147 | .llseek = seq_lseek, | |
148 | .release = single_release, | |
149 | }; | |
150 | ||
151 | int fmc_debug_init(struct fmc_device *fmc) | |
152 | { | |
153 | fmc->dbg_dir = debugfs_create_dir(dev_name(&fmc->dev), NULL); | |
154 | if (IS_ERR_OR_NULL(fmc->dbg_dir)) { | |
155 | pr_err("FMC: Cannot create debugfs\n"); | |
156 | return PTR_ERR(fmc->dbg_dir); | |
157 | } | |
158 | ||
159 | fmc->dbg_sdb_dump = debugfs_create_file(FMC_DBG_SDB_DUMP, 0444, | |
160 | fmc->dbg_dir, fmc, | |
161 | &fmc_dbgfs_sdb_dump); | |
162 | if (IS_ERR_OR_NULL(fmc->dbg_sdb_dump)) | |
163 | pr_err("FMC: Cannot create debugfs file %s\n", | |
164 | FMC_DBG_SDB_DUMP); | |
165 | ||
166 | return 0; | |
167 | } | |
168 | ||
169 | void fmc_debug_exit(struct fmc_device *fmc) | |
170 | { | |
171 | if (fmc->dbg_dir) | |
172 | debugfs_remove_recursive(fmc->dbg_dir); | |
173 | } |