diff options
Diffstat (limited to 'drivers/dma/ioat/sysfs.c')
| -rw-r--r-- | drivers/dma/ioat/sysfs.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/drivers/dma/ioat/sysfs.c b/drivers/dma/ioat/sysfs.c index cb4a857ee21b..3ac677f29e8f 100644 --- a/drivers/dma/ioat/sysfs.c +++ b/drivers/dma/ioat/sysfs.c @@ -64,8 +64,24 @@ ioat_attr_show(struct kobject *kobj, struct attribute *attr, char *page) return entry->show(&ioat_chan->dma_chan, page); } +static ssize_t +ioat_attr_store(struct kobject *kobj, struct attribute *attr, +const char *page, size_t count) +{ + struct ioat_sysfs_entry *entry; + struct ioatdma_chan *ioat_chan; + + entry = container_of(attr, struct ioat_sysfs_entry, attr); + ioat_chan = container_of(kobj, struct ioatdma_chan, kobj); + + if (!entry->store) + return -EIO; + return entry->store(&ioat_chan->dma_chan, page, count); +} + const struct sysfs_ops ioat_sysfs_ops = { .show = ioat_attr_show, + .store = ioat_attr_store, }; void ioat_kobject_add(struct ioatdma_device *ioat_dma, struct kobj_type *type) @@ -121,11 +137,37 @@ static ssize_t ring_active_show(struct dma_chan *c, char *page) } static struct ioat_sysfs_entry ring_active_attr = __ATTR_RO(ring_active); +static ssize_t intr_coalesce_show(struct dma_chan *c, char *page) +{ + struct ioatdma_chan *ioat_chan = to_ioat_chan(c); + + return sprintf(page, "%d\n", ioat_chan->intr_coalesce); +} + +static ssize_t intr_coalesce_store(struct dma_chan *c, const char *page, +size_t count) +{ + int intr_coalesce = 0; + struct ioatdma_chan *ioat_chan = to_ioat_chan(c); + + if (sscanf(page, "%du", &intr_coalesce) != -1) { + if ((intr_coalesce < 0) || + (intr_coalesce > IOAT_INTRDELAY_MASK)) + return -EINVAL; + ioat_chan->intr_coalesce = intr_coalesce; + } + + return count; +} + +static struct ioat_sysfs_entry intr_coalesce_attr = __ATTR_RW(intr_coalesce); + static struct attribute *ioat_attrs[] = { &ring_size_attr.attr, &ring_active_attr.attr, &ioat_cap_attr.attr, &ioat_version_attr.attr, + &intr_coalesce_attr.attr, NULL, }; |