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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_sw_names[] = {
52 "Allocated pages",
53 "Mapped pages",
54 "Unmapped pages",
55};
56
57static 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
66static 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++)
73 seq_printf(m, "%26s:\t%lu\n", pci_sw_names[i],
74 atomic64_read(counter));
75}
76
77static int pci_perf_show(struct seq_file *m, void *v)
78{
79 struct zpci_dev *zdev = m->private;
80
81 if (!zdev)
82 return 0;
83
84 mutex_lock(&zdev->lock);
85 if (!zdev->fmb) {
86 mutex_unlock(&zdev->lock);
87 seq_puts(m, "FMB statistics disabled\n");
88 return 0;
89 }
90
91
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
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 }
118
119 pci_sw_counter_show(m);
120 mutex_unlock(&zdev->lock);
121 return 0;
122}
123
124static 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
138 mutex_lock(&zdev->lock);
139 switch (val) {
140 case 0:
141 rc = zpci_fmb_disable_device(zdev);
142 break;
143 case 1:
144 rc = zpci_fmb_enable_device(zdev);
145 break;
146 }
147 mutex_unlock(&zdev->lock);
148 return rc ? rc : count;
149}
150
151static int pci_perf_seq_open(struct inode *inode, struct file *filp)
152{
153 return single_open(filp, pci_perf_show,
154 file_inode(filp)->i_private);
155}
156
157static 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
165void zpci_debug_init_device(struct zpci_dev *zdev, const char *name)
166{
167 zdev->debugfs_dev = debugfs_create_dir(name, debugfs_root);
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;
177}
178
179void zpci_debug_exit_device(struct zpci_dev *zdev)
180{
181 debugfs_remove(zdev->debugfs_perf);
182 debugfs_remove(zdev->debugfs_dev);
183}
184
185int __init zpci_debug_init(void)
186{
187
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
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);
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}
211
