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 outbound tasklet mod_timer calls\t: %li\n",
  68                    (long)atomic_long_read(&perf_stats.debug_tl_out_timer));
  69         seq_printf(m, "Number of stop polling calls\t\t\t: %li\n",
  70                    (long)atomic_long_read(&perf_stats.debug_stop_polling));
  71         seq_printf(m, "AI inbound tasklet loops after stop polling\t: %li\n",
  72                    (long)atomic_long_read(&perf_stats.thinint_inbound_loop2));
  73         seq_printf(m, "QEBSM EQBS total/incomplete\t\t\t: %li/%li\n",
  74                    (long)atomic_long_read(&perf_stats.debug_eqbs_all),
  75                    (long)atomic_long_read(&perf_stats.debug_eqbs_incomplete));
  76         seq_printf(m, "QEBSM SQBS total/incomplete\t\t\t: %li/%li\n",
  77                    (long)atomic_long_read(&perf_stats.debug_sqbs_all),
  78                    (long)atomic_long_read(&perf_stats.debug_sqbs_incomplete));
  79         seq_printf(m, "\n");
  80         return 0;
  81 }
  82 static int qdio_perf_seq_open(struct inode *inode, struct file *filp)
  83 {
  84         return single_open(filp, qdio_perf_proc_show, NULL);
  85 }
  86
  87 static const struct file_operations qdio_perf_proc_fops = {
  88         .owner   = THIS_MODULE,
  89         .open    = qdio_perf_seq_open,
  90         .read    = seq_read,
  91         .llseek  = seq_lseek,
  92         .release = single_release,
  93 };
  94
  95 /*
  96  * sysfs functions
  97  */
  98 static ssize_t qdio_perf_stats_show(struct bus_type *bus, char *buf)
  99 {
 100         return sprintf(buf, "%i\n", qdio_performance_stats ? 1 : 0);
 101 }
 102
 103 static ssize_t qdio_perf_stats_store(struct bus_type *bus,
 104                               const char *buf, size_t count)
 105 {
 106         unsigned long i;
 107
 108         if (strict_strtoul(buf, 16, &i) != 0)
 109                 return -EINVAL;
 110         if ((i != 0) && (i != 1))
 111                 return -EINVAL;
 112         if (i == qdio_performance_stats)
 113                 return count;
 114
 115         qdio_performance_stats = i;
 116         /* reset performance statistics */
 117         if (i == 0)
 118                 memset(&perf_stats, 0, sizeof(struct qdio_perf_stats));
 119         return count;
 120 }
 121
 122 static BUS_ATTR(qdio_performance_stats, 0644, qdio_perf_stats_show,
 123                 qdio_perf_stats_store);
 124
 125 int __init qdio_setup_perf_stats(void)
 126 {
 127         int rc;
 128
 129         rc = bus_create_file(&ccw_bus_type, &bus_attr_qdio_performance_stats);
 130         if (rc)
 131                 return rc;
 132
 133 #ifdef CONFIG_PROC_FS
 134         memset(&perf_stats, 0, sizeof(struct qdio_perf_stats));
 135         qdio_perf_pde = proc_create("qdio_perf", S_IFREG | S_IRUGO,
 136                                     NULL, &qdio_perf_proc_fops);
 137 #endif
 138         return 0;
 139 }
 140
 141 void qdio_remove_perf_stats(void)
 142 {
 143 #ifdef CONFIG_PROC_FS
 144         remove_proc_entry("qdio_perf", NULL);
 145 #endif
 146         bus_remove_file(&ccw_bus_type, &bus_attr_qdio_performance_stats);
 147 }