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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_dev *zdev = m->private;
75 struct zpci_iommu_ctrs *ctrs;
76 atomic64_t *counter;
77 unsigned long flags;
78 int i;
79
80 spin_lock_irqsave(&zdev->dom_lock, flags);
81 ctrs = zpci_get_iommu_ctrs(m->private);
82 if (!ctrs)
83 goto unlock;
84
85 counter = &ctrs->mapped_pages;
86 for (i = 0; i < ARRAY_SIZE(pci_sw_names); i++, counter++)
87 seq_printf(m, "%26s:\t%llu\n", pci_sw_names[i],
88 atomic64_read(counter));
89unlock:
90 spin_unlock_irqrestore(&zdev->dom_lock, flags);
91}
92
93static int pci_perf_show(struct seq_file *m, void *v)
94{
95 struct zpci_dev *zdev = m->private;
96
97 if (!zdev)
98 return 0;
99
100 mutex_lock(&zdev->fmb_lock);
101 if (!zdev->fmb) {
102 mutex_unlock(&zdev->fmb_lock);
103 seq_puts(m, "FMB statistics disabled\n");
104 return 0;
105 }
106
107 /* header */
108 seq_printf(m, "Update interval: %u ms\n", zdev->fmb_update);
109 seq_printf(m, "Samples: %u\n", zdev->fmb->samples);
110 seq_printf(m, "Last update TOD: %Lx\n", zdev->fmb->last_update);
111
112 pci_fmb_show(m, pci_common_names, ARRAY_SIZE(pci_common_names),
113 &zdev->fmb->ld_ops);
114
115 switch (zdev->fmb->format) {
116 case 0:
117 if (!(zdev->fmb->fmt_ind & ZPCI_FMB_DMA_COUNTER_VALID))
118 break;
119 pci_fmb_show(m, pci_fmt0_names, ARRAY_SIZE(pci_fmt0_names),
120 &zdev->fmb->fmt0.dma_rbytes);
121 break;
122 case 1:
123 pci_fmb_show(m, pci_fmt1_names, ARRAY_SIZE(pci_fmt1_names),
124 &zdev->fmb->fmt1.rx_bytes);
125 break;
126 case 2:
127 pci_fmb_show(m, pci_fmt2_names, ARRAY_SIZE(pci_fmt2_names),
128 &zdev->fmb->fmt2.consumed_work_units);
129 break;
130 case 3:
131 pci_fmb_show(m, pci_fmt3_names, ARRAY_SIZE(pci_fmt3_names),
132 &zdev->fmb->fmt3.tx_bytes);
133 break;
134 default:
135 seq_puts(m, "Unknown format\n");
136 }
137
138 pci_sw_counter_show(m);
139 mutex_unlock(&zdev->fmb_lock);
140 return 0;
141}
142
143static ssize_t pci_perf_seq_write(struct file *file, const char __user *ubuf,
144 size_t count, loff_t *off)
145{
146 struct zpci_dev *zdev = ((struct seq_file *) file->private_data)->private;
147 unsigned long val;
148 int rc;
149
150 if (!zdev)
151 return 0;
152
153 rc = kstrtoul_from_user(ubuf, count, 10, &val);
154 if (rc)
155 return rc;
156
157 mutex_lock(&zdev->fmb_lock);
158 switch (val) {
159 case 0:
160 rc = zpci_fmb_disable_device(zdev);
161 break;
162 case 1:
163 rc = zpci_fmb_enable_device(zdev);
164 break;
165 }
166 mutex_unlock(&zdev->fmb_lock);
167 return rc ? rc : count;
168}
169
170static int pci_perf_seq_open(struct inode *inode, struct file *filp)
171{
172 return single_open(filp, pci_perf_show,
173 file_inode(filp)->i_private);
174}
175
176static const struct file_operations debugfs_pci_perf_fops = {
177 .open = pci_perf_seq_open,
178 .read = seq_read,
179 .write = pci_perf_seq_write,
180 .llseek = seq_lseek,
181 .release = single_release,
182};
183
184void zpci_debug_init_device(struct zpci_dev *zdev, const char *name)
185{
186 zdev->debugfs_dev = debugfs_create_dir(name, debugfs_root);
187
188 debugfs_create_file("statistics", S_IFREG | S_IRUGO | S_IWUSR,
189 zdev->debugfs_dev, zdev, &debugfs_pci_perf_fops);
190}
191
192void zpci_debug_exit_device(struct zpci_dev *zdev)
193{
194 debugfs_remove_recursive(zdev->debugfs_dev);
195}
196
197int __init zpci_debug_init(void)
198{
199 /* event trace buffer */
200 pci_debug_msg_id = debug_register("pci_msg", 8, 1, 8 * sizeof(long));
201 if (!pci_debug_msg_id)
202 return -EINVAL;
203 debug_register_view(pci_debug_msg_id, &debug_sprintf_view);
204 debug_set_level(pci_debug_msg_id, 3);
205
206 /* error log */
207 pci_debug_err_id = debug_register("pci_error", 2, 1, 16);
208 if (!pci_debug_err_id)
209 return -EINVAL;
210 debug_register_view(pci_debug_err_id, &debug_hex_ascii_view);
211 debug_set_level(pci_debug_err_id, 3);
212
213 debugfs_root = debugfs_create_dir("pci", NULL);
214 return 0;
215}
216
217void zpci_debug_exit(void)
218{
219 debug_unregister(pci_debug_msg_id);
220 debug_unregister(pci_debug_err_id);
221 debugfs_remove(debugfs_root);
222}