Merge branch 'reiserfs/kill-bkl' of git://git.kernel.org/pub/scm/linux/kernel/git...
[linux-2.6.git] / drivers / s390 / cio / qdio_perf.c
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
28 /*
29  * procfs functions
30  */
31 static int qdio_perf_proc_show(struct seq_file *m, void *v)
32 {
33         seq_printf(m, "Number of qdio interrupts\t\t\t: %li\n",
34                    (long)atomic_long_read(&perf_stats.qdio_int));
35         seq_printf(m, "Number of PCI interrupts\t\t\t: %li\n",
36                    (long)atomic_long_read(&perf_stats.pci_int));
37         seq_printf(m, "Number of adapter interrupts\t\t\t: %li\n",
38                    (long)atomic_long_read(&perf_stats.thin_int));
39         seq_printf(m, "\n");
40         seq_printf(m, "Inbound tasklet runs\t\t\t\t: %li\n",
41                    (long)atomic_long_read(&perf_stats.tasklet_inbound));
42         seq_printf(m, "Outbound tasklet runs\t\t\t\t: %li\n",
43                    (long)atomic_long_read(&perf_stats.tasklet_outbound));
44         seq_printf(m, "Adapter interrupt tasklet runs/loops\t\t: %li/%li\n",
45                    (long)atomic_long_read(&perf_stats.tasklet_thinint),
46                    (long)atomic_long_read(&perf_stats.tasklet_thinint_loop));
47         seq_printf(m, "Adapter interrupt inbound tasklet runs/loops\t: %li/%li\n",
48                    (long)atomic_long_read(&perf_stats.thinint_inbound),
49                    (long)atomic_long_read(&perf_stats.thinint_inbound_loop));
50         seq_printf(m, "\n");
51         seq_printf(m, "Number of SIGA In issued\t\t\t: %li\n",
52                    (long)atomic_long_read(&perf_stats.siga_in));
53         seq_printf(m, "Number of SIGA Out issued\t\t\t: %li\n",
54                    (long)atomic_long_read(&perf_stats.siga_out));
55         seq_printf(m, "Number of SIGA Sync issued\t\t\t: %li\n",
56                    (long)atomic_long_read(&perf_stats.siga_sync));
57         seq_printf(m, "\n");
58         seq_printf(m, "Number of inbound transfers\t\t\t: %li\n",
59                    (long)atomic_long_read(&perf_stats.inbound_handler));
60         seq_printf(m, "Number of outbound transfers\t\t\t: %li\n",
61                    (long)atomic_long_read(&perf_stats.outbound_handler));
62         seq_printf(m, "\n");
63         seq_printf(m, "Number of fast requeues (outg. SBAL w/o SIGA)\t: %li\n",
64                    (long)atomic_long_read(&perf_stats.fast_requeue));
65         seq_printf(m, "Number of outbound target full condition\t: %li\n",
66                    (long)atomic_long_read(&perf_stats.outbound_target_full));
67         seq_printf(m, "Number of inbound queue full condition\t\t: %li\n",
68                    (long)atomic_long_read(&perf_stats.inbound_queue_full));
69         seq_printf(m, "Number of outbound tasklet mod_timer calls\t: %li\n",
70                    (long)atomic_long_read(&perf_stats.debug_tl_out_timer));
71         seq_printf(m, "Number of stop polling calls\t\t\t: %li\n",
72                    (long)atomic_long_read(&perf_stats.debug_stop_polling));
73         seq_printf(m, "AI inbound tasklet loops after stop polling\t: %li\n",
74                    (long)atomic_long_read(&perf_stats.thinint_inbound_loop2));
75         seq_printf(m, "QEBSM EQBS total/incomplete\t\t\t: %li/%li\n",
76                    (long)atomic_long_read(&perf_stats.debug_eqbs_all),
77                    (long)atomic_long_read(&perf_stats.debug_eqbs_incomplete));
78         seq_printf(m, "QEBSM SQBS total/incomplete\t\t\t: %li/%li\n",
79                    (long)atomic_long_read(&perf_stats.debug_sqbs_all),
80                    (long)atomic_long_read(&perf_stats.debug_sqbs_incomplete));
81         seq_printf(m, "\n");
82         return 0;
83 }
84 static int qdio_perf_seq_open(struct inode *inode, struct file *filp)
85 {
86         return single_open(filp, qdio_perf_proc_show, NULL);
87 }
88
89 static const struct file_operations qdio_perf_proc_fops = {
90         .owner   = THIS_MODULE,
91         .open    = qdio_perf_seq_open,
92         .read    = seq_read,
93         .llseek  = seq_lseek,
94         .release = single_release,
95 };
96
97 /*
98  * sysfs functions
99  */
100 static ssize_t qdio_perf_stats_show(struct bus_type *bus, char *buf)
101 {
102         return sprintf(buf, "%i\n", qdio_performance_stats ? 1 : 0);
103 }
104
105 static ssize_t qdio_perf_stats_store(struct bus_type *bus,
106                               const char *buf, size_t count)
107 {
108         unsigned long i;
109
110         if (strict_strtoul(buf, 16, &i) != 0)
111                 return -EINVAL;
112         if ((i != 0) && (i != 1))
113                 return -EINVAL;
114         if (i == qdio_performance_stats)
115                 return count;
116
117         qdio_performance_stats = i;
118         /* reset performance statistics */
119         if (i == 0)
120                 memset(&perf_stats, 0, sizeof(struct qdio_perf_stats));
121         return count;
122 }
123
124 static BUS_ATTR(qdio_performance_stats, 0644, qdio_perf_stats_show,
125                 qdio_perf_stats_store);
126
127 int __init qdio_setup_perf_stats(void)
128 {
129         int rc;
130
131         rc = bus_create_file(&ccw_bus_type, &bus_attr_qdio_performance_stats);
132         if (rc)
133                 return rc;
134
135 #ifdef CONFIG_PROC_FS
136         memset(&perf_stats, 0, sizeof(struct qdio_perf_stats));
137         qdio_perf_pde = proc_create("qdio_perf", S_IFREG | S_IRUGO,
138                                     NULL, &qdio_perf_proc_fops);
139 #endif
140         return 0;
141 }
142
143 void qdio_remove_perf_stats(void)
144 {
145 #ifdef CONFIG_PROC_FS
146         remove_proc_entry("qdio_perf", NULL);
147 #endif
148         bus_remove_file(&ccw_bus_type, &bus_attr_qdio_performance_stats);
149 }