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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 "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}
1/*
2 * Copyright IBM Corp. 2012
3 *
4 * Author(s):
5 * Jan Glauber <jang@linux.vnet.ibm.com>
6 */
7
8#define KMSG_COMPONENT "zpci"
9#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
10
11#include <linux/kernel.h>
12#include <linux/seq_file.h>
13#include <linux/debugfs.h>
14#include <linux/export.h>
15#include <linux/pci.h>
16#include <asm/debug.h>
17
18#include <asm/pci_dma.h>
19
20static struct dentry *debugfs_root;
21debug_info_t *pci_debug_msg_id;
22EXPORT_SYMBOL_GPL(pci_debug_msg_id);
23debug_info_t *pci_debug_err_id;
24EXPORT_SYMBOL_GPL(pci_debug_err_id);
25
26static char *pci_perf_names[] = {
27 /* hardware counters */
28 "Load operations",
29 "Store operations",
30 "Store block operations",
31 "Refresh operations",
32 "DMA read bytes",
33 "DMA write bytes",
34};
35
36static char *pci_sw_names[] = {
37 "Allocated pages",
38 "Mapped pages",
39 "Unmapped pages",
40};
41
42static void pci_sw_counter_show(struct seq_file *m)
43{
44 struct zpci_dev *zdev = m->private;
45 atomic64_t *counter = &zdev->allocated_pages;
46 int i;
47
48 for (i = 0; i < ARRAY_SIZE(pci_sw_names); i++, counter++)
49 seq_printf(m, "%26s:\t%llu\n", pci_sw_names[i],
50 atomic64_read(counter));
51}
52
53static int pci_perf_show(struct seq_file *m, void *v)
54{
55 struct zpci_dev *zdev = m->private;
56 u64 *stat;
57 int i;
58
59 if (!zdev)
60 return 0;
61
62 mutex_lock(&zdev->lock);
63 if (!zdev->fmb) {
64 mutex_unlock(&zdev->lock);
65 seq_puts(m, "FMB statistics disabled\n");
66 return 0;
67 }
68
69 /* header */
70 seq_printf(m, "FMB @ %p\n", zdev->fmb);
71 seq_printf(m, "Update interval: %u ms\n", zdev->fmb_update);
72 seq_printf(m, "Samples: %u\n", zdev->fmb->samples);
73 seq_printf(m, "Last update TOD: %Lx\n", zdev->fmb->last_update);
74
75 /* hardware counters */
76 stat = (u64 *) &zdev->fmb->ld_ops;
77 for (i = 0; i < 4; i++)
78 seq_printf(m, "%26s:\t%llu\n",
79 pci_perf_names[i], *(stat + i));
80 if (zdev->fmb->dma_valid)
81 for (i = 4; i < 6; i++)
82 seq_printf(m, "%26s:\t%llu\n",
83 pci_perf_names[i], *(stat + i));
84
85 pci_sw_counter_show(m);
86 mutex_unlock(&zdev->lock);
87 return 0;
88}
89
90static ssize_t pci_perf_seq_write(struct file *file, const char __user *ubuf,
91 size_t count, loff_t *off)
92{
93 struct zpci_dev *zdev = ((struct seq_file *) file->private_data)->private;
94 unsigned long val;
95 int rc;
96
97 if (!zdev)
98 return 0;
99
100 rc = kstrtoul_from_user(ubuf, count, 10, &val);
101 if (rc)
102 return rc;
103
104 mutex_lock(&zdev->lock);
105 switch (val) {
106 case 0:
107 rc = zpci_fmb_disable_device(zdev);
108 break;
109 case 1:
110 rc = zpci_fmb_enable_device(zdev);
111 break;
112 }
113 mutex_unlock(&zdev->lock);
114 return rc ? rc : count;
115}
116
117static int pci_perf_seq_open(struct inode *inode, struct file *filp)
118{
119 return single_open(filp, pci_perf_show,
120 file_inode(filp)->i_private);
121}
122
123static const struct file_operations debugfs_pci_perf_fops = {
124 .open = pci_perf_seq_open,
125 .read = seq_read,
126 .write = pci_perf_seq_write,
127 .llseek = seq_lseek,
128 .release = single_release,
129};
130
131void zpci_debug_init_device(struct zpci_dev *zdev, const char *name)
132{
133 zdev->debugfs_dev = debugfs_create_dir(name, debugfs_root);
134 if (IS_ERR(zdev->debugfs_dev))
135 zdev->debugfs_dev = NULL;
136
137 zdev->debugfs_perf = debugfs_create_file("statistics",
138 S_IFREG | S_IRUGO | S_IWUSR,
139 zdev->debugfs_dev, zdev,
140 &debugfs_pci_perf_fops);
141 if (IS_ERR(zdev->debugfs_perf))
142 zdev->debugfs_perf = NULL;
143}
144
145void zpci_debug_exit_device(struct zpci_dev *zdev)
146{
147 debugfs_remove(zdev->debugfs_perf);
148 debugfs_remove(zdev->debugfs_dev);
149}
150
151int __init zpci_debug_init(void)
152{
153 /* event trace buffer */
154 pci_debug_msg_id = debug_register("pci_msg", 8, 1, 8 * sizeof(long));
155 if (!pci_debug_msg_id)
156 return -EINVAL;
157 debug_register_view(pci_debug_msg_id, &debug_sprintf_view);
158 debug_set_level(pci_debug_msg_id, 3);
159
160 /* error log */
161 pci_debug_err_id = debug_register("pci_error", 2, 1, 16);
162 if (!pci_debug_err_id)
163 return -EINVAL;
164 debug_register_view(pci_debug_err_id, &debug_hex_ascii_view);
165 debug_set_level(pci_debug_err_id, 6);
166
167 debugfs_root = debugfs_create_dir("pci", NULL);
168 return 0;
169}
170
171void zpci_debug_exit(void)
172{
173 debug_unregister(pci_debug_msg_id);
174 debug_unregister(pci_debug_err_id);
175 debugfs_remove(debugfs_root);
176}