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adbb3901 | 1 | // SPDX-License-Identifier: GPL-2.0 |
d0b08853 | 2 | /* |
f9dc447e | 3 | * Copyright IBM Corp. 2012,2015 |
d0b08853 JG |
4 | * |
5 | * Author(s): | |
6 | * Jan Glauber <jang@linux.vnet.ibm.com> | |
7 | */ | |
8 | ||
896cb7e6 GS |
9 | #define KMSG_COMPONENT "zpci" |
10 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
d0b08853 JG |
11 | |
12 | #include <linux/kernel.h> | |
13 | #include <linux/seq_file.h> | |
14 | #include <linux/debugfs.h> | |
a2ab8333 | 15 | #include <linux/export.h> |
d0b08853 JG |
16 | #include <linux/pci.h> |
17 | #include <asm/debug.h> | |
18 | ||
19 | #include <asm/pci_dma.h> | |
20 | ||
21 | static struct dentry *debugfs_root; | |
a2ab8333 SO |
22 | debug_info_t *pci_debug_msg_id; |
23 | EXPORT_SYMBOL_GPL(pci_debug_msg_id); | |
24 | debug_info_t *pci_debug_err_id; | |
25 | EXPORT_SYMBOL_GPL(pci_debug_err_id); | |
d0b08853 | 26 | |
f9dc447e | 27 | static char *pci_common_names[] = { |
d0b08853 JG |
28 | "Load operations", |
29 | "Store operations", | |
30 | "Store block operations", | |
31 | "Refresh operations", | |
f9dc447e SO |
32 | }; |
33 | ||
34 | static char *pci_fmt0_names[] = { | |
d0b08853 JG |
35 | "DMA read bytes", |
36 | "DMA write bytes", | |
6001018a SO |
37 | }; |
38 | ||
f9dc447e SO |
39 | static char *pci_fmt1_names[] = { |
40 | "Received bytes", | |
41 | "Received packets", | |
42 | "Transmitted bytes", | |
43 | "Transmitted packets", | |
44 | }; | |
45 | ||
46 | static char *pci_fmt2_names[] = { | |
47 | "Consumed work units", | |
48 | "Maximum work units", | |
49 | }; | |
50 | ||
6001018a | 51 | static char *pci_sw_names[] = { |
d0b08853 JG |
52 | "Allocated pages", |
53 | "Mapped pages", | |
54 | "Unmapped pages", | |
55 | }; | |
56 | ||
f9dc447e SO |
57 | static void pci_fmb_show(struct seq_file *m, char *name[], int length, |
58 | u64 *data) | |
59 | { | |
60 | int i; | |
61 | ||
62 | for (i = 0; i < length; i++, data++) | |
63 | seq_printf(m, "%26s:\t%llu\n", name[i], *data); | |
64 | } | |
65 | ||
6001018a SO |
66 | static void pci_sw_counter_show(struct seq_file *m) |
67 | { | |
68 | struct zpci_dev *zdev = m->private; | |
69 | atomic64_t *counter = &zdev->allocated_pages; | |
70 | int i; | |
71 | ||
72 | for (i = 0; i < ARRAY_SIZE(pci_sw_names); i++, counter++) | |
126b30c3 | 73 | seq_printf(m, "%26s:\t%lu\n", pci_sw_names[i], |
6001018a SO |
74 | atomic64_read(counter)); |
75 | } | |
76 | ||
d0b08853 JG |
77 | static int pci_perf_show(struct seq_file *m, void *v) |
78 | { | |
79 | struct zpci_dev *zdev = m->private; | |
d0b08853 JG |
80 | |
81 | if (!zdev) | |
82 | return 0; | |
80ed156a SO |
83 | |
84 | mutex_lock(&zdev->lock); | |
c2f0b61d | 85 | if (!zdev->fmb) { |
80ed156a | 86 | mutex_unlock(&zdev->lock); |
c2f0b61d JP |
87 | seq_puts(m, "FMB statistics disabled\n"); |
88 | return 0; | |
89 | } | |
d0b08853 JG |
90 | |
91 | /* header */ | |
92 | seq_printf(m, "FMB @ %p\n", zdev->fmb); | |
93 | seq_printf(m, "Update interval: %u ms\n", zdev->fmb_update); | |
94 | seq_printf(m, "Samples: %u\n", zdev->fmb->samples); | |
95 | seq_printf(m, "Last update TOD: %Lx\n", zdev->fmb->last_update); | |
96 | ||
f9dc447e SO |
97 | pci_fmb_show(m, pci_common_names, ARRAY_SIZE(pci_common_names), |
98 | &zdev->fmb->ld_ops); | |
99 | ||
100 | switch (zdev->fmb->format) { | |
101 | case 0: | |
102 | if (!(zdev->fmb->fmt_ind & ZPCI_FMB_DMA_COUNTER_VALID)) | |
103 | break; | |
104 | pci_fmb_show(m, pci_fmt0_names, ARRAY_SIZE(pci_fmt0_names), | |
105 | &zdev->fmb->fmt0.dma_rbytes); | |
106 | break; | |
107 | case 1: | |
108 | pci_fmb_show(m, pci_fmt1_names, ARRAY_SIZE(pci_fmt1_names), | |
109 | &zdev->fmb->fmt1.rx_bytes); | |
110 | break; | |
111 | case 2: | |
112 | pci_fmb_show(m, pci_fmt2_names, ARRAY_SIZE(pci_fmt2_names), | |
113 | &zdev->fmb->fmt2.consumed_work_units); | |
114 | break; | |
115 | default: | |
116 | seq_puts(m, "Unknown format\n"); | |
117 | } | |
d0b08853 | 118 | |
6001018a | 119 | pci_sw_counter_show(m); |
80ed156a | 120 | mutex_unlock(&zdev->lock); |
d0b08853 JG |
121 | return 0; |
122 | } | |
123 | ||
124 | static ssize_t pci_perf_seq_write(struct file *file, const char __user *ubuf, | |
125 | size_t count, loff_t *off) | |
126 | { | |
127 | struct zpci_dev *zdev = ((struct seq_file *) file->private_data)->private; | |
128 | unsigned long val; | |
129 | int rc; | |
130 | ||
131 | if (!zdev) | |
132 | return 0; | |
133 | ||
134 | rc = kstrtoul_from_user(ubuf, count, 10, &val); | |
135 | if (rc) | |
136 | return rc; | |
137 | ||
80ed156a | 138 | mutex_lock(&zdev->lock); |
d0b08853 JG |
139 | switch (val) { |
140 | case 0: | |
141 | rc = zpci_fmb_disable_device(zdev); | |
d0b08853 JG |
142 | break; |
143 | case 1: | |
144 | rc = zpci_fmb_enable_device(zdev); | |
d0b08853 JG |
145 | break; |
146 | } | |
80ed156a SO |
147 | mutex_unlock(&zdev->lock); |
148 | return rc ? rc : count; | |
d0b08853 JG |
149 | } |
150 | ||
151 | static int pci_perf_seq_open(struct inode *inode, struct file *filp) | |
152 | { | |
153 | return single_open(filp, pci_perf_show, | |
496ad9aa | 154 | file_inode(filp)->i_private); |
d0b08853 JG |
155 | } |
156 | ||
157 | static const struct file_operations debugfs_pci_perf_fops = { | |
158 | .open = pci_perf_seq_open, | |
159 | .read = seq_read, | |
160 | .write = pci_perf_seq_write, | |
161 | .llseek = seq_lseek, | |
162 | .release = single_release, | |
163 | }; | |
164 | ||
9a99649f | 165 | void zpci_debug_init_device(struct zpci_dev *zdev, const char *name) |
d0b08853 | 166 | { |
9a99649f | 167 | zdev->debugfs_dev = debugfs_create_dir(name, debugfs_root); |
d0b08853 JG |
168 | if (IS_ERR(zdev->debugfs_dev)) |
169 | zdev->debugfs_dev = NULL; | |
170 | ||
171 | zdev->debugfs_perf = debugfs_create_file("statistics", | |
172 | S_IFREG | S_IRUGO | S_IWUSR, | |
173 | zdev->debugfs_dev, zdev, | |
174 | &debugfs_pci_perf_fops); | |
175 | if (IS_ERR(zdev->debugfs_perf)) | |
176 | zdev->debugfs_perf = NULL; | |
d0b08853 JG |
177 | } |
178 | ||
179 | void zpci_debug_exit_device(struct zpci_dev *zdev) | |
180 | { | |
181 | debugfs_remove(zdev->debugfs_perf); | |
d0b08853 JG |
182 | debugfs_remove(zdev->debugfs_dev); |
183 | } | |
184 | ||
185 | int __init zpci_debug_init(void) | |
186 | { | |
187 | /* event trace buffer */ | |
f7e1e65d | 188 | pci_debug_msg_id = debug_register("pci_msg", 8, 1, 8 * sizeof(long)); |
d0b08853 JG |
189 | if (!pci_debug_msg_id) |
190 | return -EINVAL; | |
191 | debug_register_view(pci_debug_msg_id, &debug_sprintf_view); | |
192 | debug_set_level(pci_debug_msg_id, 3); | |
d0b08853 JG |
193 | |
194 | /* error log */ | |
195 | pci_debug_err_id = debug_register("pci_error", 2, 1, 16); | |
196 | if (!pci_debug_err_id) | |
197 | return -EINVAL; | |
198 | debug_register_view(pci_debug_err_id, &debug_hex_ascii_view); | |
199 | debug_set_level(pci_debug_err_id, 6); | |
d0b08853 JG |
200 | |
201 | debugfs_root = debugfs_create_dir("pci", NULL); | |
202 | return 0; | |
203 | } | |
204 | ||
205 | void zpci_debug_exit(void) | |
206 | { | |
8c080bd0 ME |
207 | debug_unregister(pci_debug_msg_id); |
208 | debug_unregister(pci_debug_err_id); | |
d0b08853 JG |
209 | debugfs_remove(debugfs_root); |
210 | } |