diff options
Diffstat (limited to 'arch/s390/pci/pci_debug.c')
| -rw-r--r-- | arch/s390/pci/pci_debug.c | 33 |
1 files changed, 22 insertions, 11 deletions
diff --git a/arch/s390/pci/pci_debug.c b/arch/s390/pci/pci_debug.c index c22d4402ae45..4129b0a5fd78 100644 --- a/arch/s390/pci/pci_debug.c +++ b/arch/s390/pci/pci_debug.c @@ -31,12 +31,25 @@ static char *pci_perf_names[] = { "Refresh operations", "DMA read bytes", "DMA write bytes", - /* software counters */ +}; + +static char *pci_sw_names[] = { "Allocated pages", "Mapped pages", "Unmapped pages", }; +static void pci_sw_counter_show(struct seq_file *m) +{ + struct zpci_dev *zdev = m->private; + atomic64_t *counter = &zdev->allocated_pages; + int i; + + for (i = 0; i < ARRAY_SIZE(pci_sw_names); i++, counter++) + seq_printf(m, "%26s:\t%llu\n", pci_sw_names[i], + atomic64_read(counter)); +} + static int pci_perf_show(struct seq_file *m, void *v) { struct zpci_dev *zdev = m->private; @@ -45,7 +58,10 @@ static int pci_perf_show(struct seq_file *m, void *v) if (!zdev) return 0; + + mutex_lock(&zdev->lock); if (!zdev->fmb) { + mutex_unlock(&zdev->lock); seq_puts(m, "FMB statistics disabled\n"); return 0; } @@ -65,12 +81,9 @@ static int pci_perf_show(struct seq_file *m, void *v) for (i = 4; i < 6; i++) seq_printf(m, "%26s:\t%llu\n", pci_perf_names[i], *(stat + i)); - /* software counters */ - for (i = 6; i < ARRAY_SIZE(pci_perf_names); i++) - seq_printf(m, "%26s:\t%llu\n", - pci_perf_names[i], - atomic64_read((atomic64_t *) (stat + i))); + pci_sw_counter_show(m); + mutex_unlock(&zdev->lock); return 0; } @@ -88,19 +101,17 @@ static ssize_t pci_perf_seq_write(struct file *file, const char __user *ubuf, if (rc) return rc; + mutex_lock(&zdev->lock); switch (val) { case 0: rc = zpci_fmb_disable_device(zdev); - if (rc) - return rc; break; case 1: rc = zpci_fmb_enable_device(zdev); - if (rc) - return rc; break; } - return count; + mutex_unlock(&zdev->lock); + return rc ? rc : count; } static int pci_perf_seq_open(struct inode *inode, struct file *filp) |