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 inline void qdio_perf_stat_inc(atomic_long_t *count)
  29 {
  30         if (qdio_performance_stats)
  31                 atomic_long_inc(count);
  32 }
  33
  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  */
  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 }
  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  */
 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
 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
 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
 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 }