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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 | ||
0ac94282 SO |
51 | static char *pci_fmt3_names[] = { |
52 | "Transmitted bytes", | |
53 | }; | |
54 | ||
6001018a | 55 | static char *pci_sw_names[] = { |
d0b08853 JG |
56 | "Mapped pages", |
57 | "Unmapped pages", | |
c76c067e NS |
58 | "Global RPCITs", |
59 | "Sync Map RPCITs", | |
60 | "Sync RPCITs", | |
d0b08853 JG |
61 | }; |
62 | ||
f9dc447e SO |
63 | static void pci_fmb_show(struct seq_file *m, char *name[], int length, |
64 | u64 *data) | |
65 | { | |
66 | int i; | |
67 | ||
68 | for (i = 0; i < length; i++, data++) | |
69 | seq_printf(m, "%26s:\t%llu\n", name[i], *data); | |
70 | } | |
71 | ||
6001018a SO |
72 | static void pci_sw_counter_show(struct seq_file *m) |
73 | { | |
c76c067e NS |
74 | struct zpci_iommu_ctrs *ctrs = zpci_get_iommu_ctrs(m->private); |
75 | atomic64_t *counter; | |
6001018a SO |
76 | int i; |
77 | ||
c76c067e NS |
78 | if (!ctrs) |
79 | return; | |
80 | ||
81 | counter = &ctrs->mapped_pages; | |
6001018a | 82 | for (i = 0; i < ARRAY_SIZE(pci_sw_names); i++, counter++) |
982164d6 | 83 | seq_printf(m, "%26s:\t%llu\n", pci_sw_names[i], |
6a6a9d5f | 84 | atomic64_read(counter)); |
6001018a SO |
85 | } |
86 | ||
d0b08853 JG |
87 | static int pci_perf_show(struct seq_file *m, void *v) |
88 | { | |
89 | struct zpci_dev *zdev = m->private; | |
d0b08853 JG |
90 | |
91 | if (!zdev) | |
92 | return 0; | |
80ed156a | 93 | |
0d48566d | 94 | mutex_lock(&zdev->fmb_lock); |
c2f0b61d | 95 | if (!zdev->fmb) { |
0d48566d | 96 | mutex_unlock(&zdev->fmb_lock); |
c2f0b61d JP |
97 | seq_puts(m, "FMB statistics disabled\n"); |
98 | return 0; | |
99 | } | |
d0b08853 JG |
100 | |
101 | /* header */ | |
d0b08853 JG |
102 | seq_printf(m, "Update interval: %u ms\n", zdev->fmb_update); |
103 | seq_printf(m, "Samples: %u\n", zdev->fmb->samples); | |
104 | seq_printf(m, "Last update TOD: %Lx\n", zdev->fmb->last_update); | |
105 | ||
f9dc447e SO |
106 | pci_fmb_show(m, pci_common_names, ARRAY_SIZE(pci_common_names), |
107 | &zdev->fmb->ld_ops); | |
108 | ||
109 | switch (zdev->fmb->format) { | |
110 | case 0: | |
111 | if (!(zdev->fmb->fmt_ind & ZPCI_FMB_DMA_COUNTER_VALID)) | |
112 | break; | |
113 | pci_fmb_show(m, pci_fmt0_names, ARRAY_SIZE(pci_fmt0_names), | |
114 | &zdev->fmb->fmt0.dma_rbytes); | |
115 | break; | |
116 | case 1: | |
117 | pci_fmb_show(m, pci_fmt1_names, ARRAY_SIZE(pci_fmt1_names), | |
118 | &zdev->fmb->fmt1.rx_bytes); | |
119 | break; | |
120 | case 2: | |
121 | pci_fmb_show(m, pci_fmt2_names, ARRAY_SIZE(pci_fmt2_names), | |
122 | &zdev->fmb->fmt2.consumed_work_units); | |
123 | break; | |
0ac94282 SO |
124 | case 3: |
125 | pci_fmb_show(m, pci_fmt3_names, ARRAY_SIZE(pci_fmt3_names), | |
126 | &zdev->fmb->fmt3.tx_bytes); | |
127 | break; | |
f9dc447e SO |
128 | default: |
129 | seq_puts(m, "Unknown format\n"); | |
130 | } | |
d0b08853 | 131 | |
6001018a | 132 | pci_sw_counter_show(m); |
0d48566d | 133 | mutex_unlock(&zdev->fmb_lock); |
d0b08853 JG |
134 | return 0; |
135 | } | |
136 | ||
137 | static ssize_t pci_perf_seq_write(struct file *file, const char __user *ubuf, | |
138 | size_t count, loff_t *off) | |
139 | { | |
140 | struct zpci_dev *zdev = ((struct seq_file *) file->private_data)->private; | |
141 | unsigned long val; | |
142 | int rc; | |
143 | ||
144 | if (!zdev) | |
145 | return 0; | |
146 | ||
147 | rc = kstrtoul_from_user(ubuf, count, 10, &val); | |
148 | if (rc) | |
149 | return rc; | |
150 | ||
0d48566d | 151 | mutex_lock(&zdev->fmb_lock); |
d0b08853 JG |
152 | switch (val) { |
153 | case 0: | |
154 | rc = zpci_fmb_disable_device(zdev); | |
d0b08853 JG |
155 | break; |
156 | case 1: | |
157 | rc = zpci_fmb_enable_device(zdev); | |
d0b08853 JG |
158 | break; |
159 | } | |
0d48566d | 160 | mutex_unlock(&zdev->fmb_lock); |
80ed156a | 161 | return rc ? rc : count; |
d0b08853 JG |
162 | } |
163 | ||
164 | static int pci_perf_seq_open(struct inode *inode, struct file *filp) | |
165 | { | |
166 | return single_open(filp, pci_perf_show, | |
496ad9aa | 167 | file_inode(filp)->i_private); |
d0b08853 JG |
168 | } |
169 | ||
170 | static const struct file_operations debugfs_pci_perf_fops = { | |
171 | .open = pci_perf_seq_open, | |
172 | .read = seq_read, | |
173 | .write = pci_perf_seq_write, | |
174 | .llseek = seq_lseek, | |
175 | .release = single_release, | |
176 | }; | |
177 | ||
9a99649f | 178 | void zpci_debug_init_device(struct zpci_dev *zdev, const char *name) |
d0b08853 | 179 | { |
9a99649f | 180 | zdev->debugfs_dev = debugfs_create_dir(name, debugfs_root); |
d7f2f7c7 GKH |
181 | |
182 | debugfs_create_file("statistics", S_IFREG | S_IRUGO | S_IWUSR, | |
183 | zdev->debugfs_dev, zdev, &debugfs_pci_perf_fops); | |
d0b08853 JG |
184 | } |
185 | ||
186 | void zpci_debug_exit_device(struct zpci_dev *zdev) | |
187 | { | |
d7f2f7c7 | 188 | debugfs_remove_recursive(zdev->debugfs_dev); |
d0b08853 JG |
189 | } |
190 | ||
191 | int __init zpci_debug_init(void) | |
192 | { | |
193 | /* event trace buffer */ | |
f7e1e65d | 194 | pci_debug_msg_id = debug_register("pci_msg", 8, 1, 8 * sizeof(long)); |
d0b08853 JG |
195 | if (!pci_debug_msg_id) |
196 | return -EINVAL; | |
197 | debug_register_view(pci_debug_msg_id, &debug_sprintf_view); | |
198 | debug_set_level(pci_debug_msg_id, 3); | |
d0b08853 JG |
199 | |
200 | /* error log */ | |
201 | pci_debug_err_id = debug_register("pci_error", 2, 1, 16); | |
202 | if (!pci_debug_err_id) | |
203 | return -EINVAL; | |
204 | debug_register_view(pci_debug_err_id, &debug_hex_ascii_view); | |
52c79e63 | 205 | debug_set_level(pci_debug_err_id, 3); |
d0b08853 JG |
206 | |
207 | debugfs_root = debugfs_create_dir("pci", NULL); | |
208 | return 0; | |
209 | } | |
210 | ||
211 | void zpci_debug_exit(void) | |
212 | { | |
8c080bd0 ME |
213 | debug_unregister(pci_debug_msg_id); |
214 | debug_unregister(pci_debug_err_id); | |
d0b08853 JG |
215 | debugfs_remove(debugfs_root); |
216 | } |