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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright IBM Corp. 2012,2015
4 *
5 * Author(s):
6 * Jan Glauber <jang@linux.vnet.ibm.com>
7 */
8
9#define KMSG_COMPONENT "zpci"
10#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
11
12#include <linux/kernel.h>
13#include <linux/seq_file.h>
14#include <linux/debugfs.h>
15#include <linux/export.h>
16#include <linux/pci.h>
17#include <asm/debug.h>
18
19#include <asm/pci_dma.h>
20
21static struct dentry *debugfs_root;
22debug_info_t *pci_debug_msg_id;
23EXPORT_SYMBOL_GPL(pci_debug_msg_id);
24debug_info_t *pci_debug_err_id;
25EXPORT_SYMBOL_GPL(pci_debug_err_id);
26
27static char *pci_common_names[] = {
28 "Load operations",
29 "Store operations",
30 "Store block operations",
31 "Refresh operations",
32};
33
34static char *pci_fmt0_names[] = {
35 "DMA read bytes",
36 "DMA write bytes",
37};
38
39static char *pci_fmt1_names[] = {
40 "Received bytes",
41 "Received packets",
42 "Transmitted bytes",
43 "Transmitted packets",
44};
45
46static char *pci_fmt2_names[] = {
47 "Consumed work units",
48 "Maximum work units",
49};
50
51static char *pci_fmt3_names[] = {
52 "Transmitted bytes",
53};
54
55static char *pci_sw_names[] = {
56 "Allocated pages",
57 "Mapped pages",
58 "Unmapped pages",
59};
60
61static void pci_fmb_show(struct seq_file *m, char *name[], int length,
62 u64 *data)
63{
64 int i;
65
66 for (i = 0; i < length; i++, data++)
67 seq_printf(m, "%26s:\t%llu\n", name[i], *data);
68}
69
70static void pci_sw_counter_show(struct seq_file *m)
71{
72 struct zpci_dev *zdev = m->private;
73 atomic64_t *counter = &zdev->allocated_pages;
74 int i;
75
76 for (i = 0; i < ARRAY_SIZE(pci_sw_names); i++, counter++)
77 seq_printf(m, "%26s:\t%llu\n", pci_sw_names[i],
78 atomic64_read(counter));
79}
80
81static int pci_perf_show(struct seq_file *m, void *v)
82{
83 struct zpci_dev *zdev = m->private;
84
85 if (!zdev)
86 return 0;
87
88 mutex_lock(&zdev->lock);
89 if (!zdev->fmb) {
90 mutex_unlock(&zdev->lock);
91 seq_puts(m, "FMB statistics disabled\n");
92 return 0;
93 }
94
95 /* header */
96 seq_printf(m, "Update interval: %u ms\n", zdev->fmb_update);
97 seq_printf(m, "Samples: %u\n", zdev->fmb->samples);
98 seq_printf(m, "Last update TOD: %Lx\n", zdev->fmb->last_update);
99
100 pci_fmb_show(m, pci_common_names, ARRAY_SIZE(pci_common_names),
101 &zdev->fmb->ld_ops);
102
103 switch (zdev->fmb->format) {
104 case 0:
105 if (!(zdev->fmb->fmt_ind & ZPCI_FMB_DMA_COUNTER_VALID))
106 break;
107 pci_fmb_show(m, pci_fmt0_names, ARRAY_SIZE(pci_fmt0_names),
108 &zdev->fmb->fmt0.dma_rbytes);
109 break;
110 case 1:
111 pci_fmb_show(m, pci_fmt1_names, ARRAY_SIZE(pci_fmt1_names),
112 &zdev->fmb->fmt1.rx_bytes);
113 break;
114 case 2:
115 pci_fmb_show(m, pci_fmt2_names, ARRAY_SIZE(pci_fmt2_names),
116 &zdev->fmb->fmt2.consumed_work_units);
117 break;
118 case 3:
119 pci_fmb_show(m, pci_fmt3_names, ARRAY_SIZE(pci_fmt3_names),
120 &zdev->fmb->fmt3.tx_bytes);
121 break;
122 default:
123 seq_puts(m, "Unknown format\n");
124 }
125
126 pci_sw_counter_show(m);
127 mutex_unlock(&zdev->lock);
128 return 0;
129}
130
131static ssize_t pci_perf_seq_write(struct file *file, const char __user *ubuf,
132 size_t count, loff_t *off)
133{
134 struct zpci_dev *zdev = ((struct seq_file *) file->private_data)->private;
135 unsigned long val;
136 int rc;
137
138 if (!zdev)
139 return 0;
140
141 rc = kstrtoul_from_user(ubuf, count, 10, &val);
142 if (rc)
143 return rc;
144
145 mutex_lock(&zdev->lock);
146 switch (val) {
147 case 0:
148 rc = zpci_fmb_disable_device(zdev);
149 break;
150 case 1:
151 rc = zpci_fmb_enable_device(zdev);
152 break;
153 }
154 mutex_unlock(&zdev->lock);
155 return rc ? rc : count;
156}
157
158static int pci_perf_seq_open(struct inode *inode, struct file *filp)
159{
160 return single_open(filp, pci_perf_show,
161 file_inode(filp)->i_private);
162}
163
164static const struct file_operations debugfs_pci_perf_fops = {
165 .open = pci_perf_seq_open,
166 .read = seq_read,
167 .write = pci_perf_seq_write,
168 .llseek = seq_lseek,
169 .release = single_release,
170};
171
172void zpci_debug_init_device(struct zpci_dev *zdev, const char *name)
173{
174 zdev->debugfs_dev = debugfs_create_dir(name, debugfs_root);
175
176 debugfs_create_file("statistics", S_IFREG | S_IRUGO | S_IWUSR,
177 zdev->debugfs_dev, zdev, &debugfs_pci_perf_fops);
178}
179
180void zpci_debug_exit_device(struct zpci_dev *zdev)
181{
182 debugfs_remove_recursive(zdev->debugfs_dev);
183}
184
185int __init zpci_debug_init(void)
186{
187 /* event trace buffer */
188 pci_debug_msg_id = debug_register("pci_msg", 8, 1, 8 * sizeof(long));
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);
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, 3);
200
201 debugfs_root = debugfs_create_dir("pci", NULL);
202 return 0;
203}
204
205void zpci_debug_exit(void)
206{
207 debug_unregister(pci_debug_msg_id);
208 debug_unregister(pci_debug_err_id);
209 debugfs_remove(debugfs_root);
210}
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright IBM Corp. 2012,2015
4 *
5 * Author(s):
6 * Jan Glauber <jang@linux.vnet.ibm.com>
7 */
8
9#define KMSG_COMPONENT "zpci"
10#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
11
12#include <linux/kernel.h>
13#include <linux/seq_file.h>
14#include <linux/debugfs.h>
15#include <linux/export.h>
16#include <linux/pci.h>
17#include <asm/debug.h>
18
19#include <asm/pci_dma.h>
20
21static struct dentry *debugfs_root;
22debug_info_t *pci_debug_msg_id;
23EXPORT_SYMBOL_GPL(pci_debug_msg_id);
24debug_info_t *pci_debug_err_id;
25EXPORT_SYMBOL_GPL(pci_debug_err_id);
26
27static char *pci_common_names[] = {
28 "Load operations",
29 "Store operations",
30 "Store block operations",
31 "Refresh operations",
32};
33
34static char *pci_fmt0_names[] = {
35 "DMA read bytes",
36 "DMA write bytes",
37};
38
39static char *pci_fmt1_names[] = {
40 "Received bytes",
41 "Received packets",
42 "Transmitted bytes",
43 "Transmitted packets",
44};
45
46static char *pci_fmt2_names[] = {
47 "Consumed work units",
48 "Maximum work units",
49};
50
51static char *pci_fmt3_names[] = {
52 "Transmitted bytes",
53};
54
55static char *pci_sw_names[] = {
56 "Mapped pages",
57 "Unmapped pages",
58 "Global RPCITs",
59 "Sync Map RPCITs",
60 "Sync RPCITs",
61};
62
63static 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
72static void pci_sw_counter_show(struct seq_file *m)
73{
74 struct zpci_iommu_ctrs *ctrs = zpci_get_iommu_ctrs(m->private);
75 atomic64_t *counter;
76 int i;
77
78 if (!ctrs)
79 return;
80
81 counter = &ctrs->mapped_pages;
82 for (i = 0; i < ARRAY_SIZE(pci_sw_names); i++, counter++)
83 seq_printf(m, "%26s:\t%llu\n", pci_sw_names[i],
84 atomic64_read(counter));
85}
86
87static int pci_perf_show(struct seq_file *m, void *v)
88{
89 struct zpci_dev *zdev = m->private;
90
91 if (!zdev)
92 return 0;
93
94 mutex_lock(&zdev->lock);
95 if (!zdev->fmb) {
96 mutex_unlock(&zdev->lock);
97 seq_puts(m, "FMB statistics disabled\n");
98 return 0;
99 }
100
101 /* header */
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
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;
124 case 3:
125 pci_fmb_show(m, pci_fmt3_names, ARRAY_SIZE(pci_fmt3_names),
126 &zdev->fmb->fmt3.tx_bytes);
127 break;
128 default:
129 seq_puts(m, "Unknown format\n");
130 }
131
132 pci_sw_counter_show(m);
133 mutex_unlock(&zdev->lock);
134 return 0;
135}
136
137static 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
151 mutex_lock(&zdev->lock);
152 switch (val) {
153 case 0:
154 rc = zpci_fmb_disable_device(zdev);
155 break;
156 case 1:
157 rc = zpci_fmb_enable_device(zdev);
158 break;
159 }
160 mutex_unlock(&zdev->lock);
161 return rc ? rc : count;
162}
163
164static int pci_perf_seq_open(struct inode *inode, struct file *filp)
165{
166 return single_open(filp, pci_perf_show,
167 file_inode(filp)->i_private);
168}
169
170static 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
178void zpci_debug_init_device(struct zpci_dev *zdev, const char *name)
179{
180 zdev->debugfs_dev = debugfs_create_dir(name, debugfs_root);
181
182 debugfs_create_file("statistics", S_IFREG | S_IRUGO | S_IWUSR,
183 zdev->debugfs_dev, zdev, &debugfs_pci_perf_fops);
184}
185
186void zpci_debug_exit_device(struct zpci_dev *zdev)
187{
188 debugfs_remove_recursive(zdev->debugfs_dev);
189}
190
191int __init zpci_debug_init(void)
192{
193 /* event trace buffer */
194 pci_debug_msg_id = debug_register("pci_msg", 8, 1, 8 * sizeof(long));
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);
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);
205 debug_set_level(pci_debug_err_id, 3);
206
207 debugfs_root = debugfs_create_dir("pci", NULL);
208 return 0;
209}
210
211void zpci_debug_exit(void)
212{
213 debug_unregister(pci_debug_msg_id);
214 debug_unregister(pci_debug_err_id);
215 debugfs_remove(debugfs_root);
216}