1 /*
2 * drivers/s390/cio/qdio_perf.c
3 *
4 * Copyright IBM Corp. 2008
5 *
6 * Author: Jan Glauber (jang@linux.vnet.ibm.com)
7 */
8 #include <linux/kernel.h>
9 #include <linux/proc_fs.h>
10 #include <linux/seq_file.h>
11 #include <asm/ccwdev.h>
12
13 #include "cio.h"
14 #include "css.h"
15 #include "device.h"
16 #include "ioasm.h"
17 #include "chsc.h"
18 #include "qdio_debug.h"
19 #include "qdio_perf.h"
20
21 int qdio_performance_stats;
22 struct qdio_perf_stats perf_stats;
23
24 #ifdef CONFIG_PROC_FS
25 static struct proc_dir_entry *qdio_perf_pde;
26 #endif
27
qdio_perf_stat_inc(atomic_long_t * count)28 inline void qdio_perf_stat_inc(atomic_long_t *count)
29 {
30 if (qdio_performance_stats)
31 atomic_long_inc(count);
32 }
33
qdio_perf_stat_dec(atomic_long_t * count)34 inline void qdio_perf_stat_dec(atomic_long_t *count)
35 {
36 if (qdio_performance_stats)
37 atomic_long_dec(count);
38 }
39
40 /*
41 * procfs functions
42 */
qdio_perf_proc_show(struct seq_file * m,void * v)43 static int qdio_perf_proc_show(struct seq_file *m, void *v)
44 {
45 seq_printf(m, "Number of qdio interrupts\t\t\t: %li\n",
46 (long)atomic_long_read(&perf_stats.qdio_int));
47 seq_printf(m, "Number of PCI interrupts\t\t\t: %li\n",
48 (long)atomic_long_read(&perf_stats.pci_int));
49 seq_printf(m, "Number of adapter interrupts\t\t\t: %li\n",
50 (long)atomic_long_read(&perf_stats.thin_int));
51 seq_printf(m, "\n");
52 seq_printf(m, "Inbound tasklet runs\t\t\t\t: %li\n",
53 (long)atomic_long_read(&perf_stats.tasklet_inbound));
54 seq_printf(m, "Outbound tasklet runs\t\t\t\t: %li\n",
55 (long)atomic_long_read(&perf_stats.tasklet_outbound));
56 seq_printf(m, "Adapter interrupt tasklet runs/loops\t\t: %li/%li\n",
57 (long)atomic_long_read(&perf_stats.tasklet_thinint),
58 (long)atomic_long_read(&perf_stats.tasklet_thinint_loop));
59 seq_printf(m, "Adapter interrupt inbound tasklet runs/loops\t: %li/%li\n",
60 (long)atomic_long_read(&perf_stats.thinint_inbound),
61 (long)atomic_long_read(&perf_stats.thinint_inbound_loop));
62 seq_printf(m, "\n");
63 seq_printf(m, "Number of SIGA In issued\t\t\t: %li\n",
64 (long)atomic_long_read(&perf_stats.siga_in));
65 seq_printf(m, "Number of SIGA Out issued\t\t\t: %li\n",
66 (long)atomic_long_read(&perf_stats.siga_out));
67 seq_printf(m, "Number of SIGA Sync issued\t\t\t: %li\n",
68 (long)atomic_long_read(&perf_stats.siga_sync));
69 seq_printf(m, "\n");
70 seq_printf(m, "Number of inbound transfers\t\t\t: %li\n",
71 (long)atomic_long_read(&perf_stats.inbound_handler));
72 seq_printf(m, "Number of outbound transfers\t\t\t: %li\n",
73 (long)atomic_long_read(&perf_stats.outbound_handler));
74 seq_printf(m, "\n");
75 seq_printf(m, "Number of fast requeues (outg. SBAL w/o SIGA)\t: %li\n",
76 (long)atomic_long_read(&perf_stats.fast_requeue));
77 seq_printf(m, "Number of outbound target full condition\t: %li\n",
78 (long)atomic_long_read(&perf_stats.outbound_target_full));
79 seq_printf(m, "Number of outbound tasklet mod_timer calls\t: %li\n",
80 (long)atomic_long_read(&perf_stats.debug_tl_out_timer));
81 seq_printf(m, "Number of stop polling calls\t\t\t: %li\n",
82 (long)atomic_long_read(&perf_stats.debug_stop_polling));
83 seq_printf(m, "AI inbound tasklet loops after stop polling\t: %li\n",
84 (long)atomic_long_read(&perf_stats.thinint_inbound_loop2));
85 seq_printf(m, "QEBSM EQBS total/incomplete\t\t\t: %li/%li\n",
86 (long)atomic_long_read(&perf_stats.debug_eqbs_all),
87 (long)atomic_long_read(&perf_stats.debug_eqbs_incomplete));
88 seq_printf(m, "QEBSM SQBS total/incomplete\t\t\t: %li/%li\n",
89 (long)atomic_long_read(&perf_stats.debug_sqbs_all),
90 (long)atomic_long_read(&perf_stats.debug_sqbs_incomplete));
91 seq_printf(m, "\n");
92 return 0;
93 }
qdio_perf_seq_open(struct inode * inode,struct file * filp)94 static int qdio_perf_seq_open(struct inode *inode, struct file *filp)
95 {
96 return single_open(filp, qdio_perf_proc_show, NULL);
97 }
98
99 static struct file_operations qdio_perf_proc_fops = {
100 .owner = THIS_MODULE,
101 .open = qdio_perf_seq_open,
102 .read = seq_read,
103 .llseek = seq_lseek,
104 .release = single_release,
105 };
106
107 /*
108 * sysfs functions
109 */
qdio_perf_stats_show(struct bus_type * bus,char * buf)110 static ssize_t qdio_perf_stats_show(struct bus_type *bus, char *buf)
111 {
112 return sprintf(buf, "%i\n", qdio_performance_stats ? 1 : 0);
113 }
114
qdio_perf_stats_store(struct bus_type * bus,const char * buf,size_t count)115 static ssize_t qdio_perf_stats_store(struct bus_type *bus,
116 const char *buf, size_t count)
117 {
118 unsigned long i;
119
120 if (strict_strtoul(buf, 16, &i) != 0)
121 return -EINVAL;
122 if ((i != 0) && (i != 1))
123 return -EINVAL;
124 if (i == qdio_performance_stats)
125 return count;
126
127 qdio_performance_stats = i;
128 /* reset performance statistics */
129 if (i == 0)
130 memset(&perf_stats, 0, sizeof(struct qdio_perf_stats));
131 return count;
132 }
133
134 static BUS_ATTR(qdio_performance_stats, 0644, qdio_perf_stats_show,
135 qdio_perf_stats_store);
136
qdio_setup_perf_stats(void)137 int __init qdio_setup_perf_stats(void)
138 {
139 int rc;
140
141 rc = bus_create_file(&ccw_bus_type, &bus_attr_qdio_performance_stats);
142 if (rc)
143 return rc;
144
145 #ifdef CONFIG_PROC_FS
146 memset(&perf_stats, 0, sizeof(struct qdio_perf_stats));
147 qdio_perf_pde = proc_create("qdio_perf", S_IFREG | S_IRUGO,
148 NULL, &qdio_perf_proc_fops);
149 #endif
150 return 0;
151 }
152
qdio_remove_perf_stats(void)153 void qdio_remove_perf_stats(void)
154 {
155 #ifdef CONFIG_PROC_FS
156 remove_proc_entry("qdio_perf", NULL);
157 #endif
158 bus_remove_file(&ccw_bus_type, &bus_attr_qdio_performance_stats);
159 }
160