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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
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
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
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
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
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}
177
