[PATCH 2/5] IB/hfi1: Add a new VL sysfs attribute for sdma engines

Dennis Dalessandro
2016-09-25T14:44:30Z

This patch adds a read-only "VL" attribute for the sysfs entry of each
sdma engine. It will allow the user to check VL to sdma engine mappings.

Reviewed-by: Dennis Dalessandro <dennis.dalessandro-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Reviewed-by: Sebastian Sanchez <sebastian.sanchez-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Reviewed-by: Jianxin Xiong <jianxin.xiong-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Tadeusz Struk <tadeusz.struk-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
---
drivers/infiniband/hw/hfi1/sysfs.c | 15 ++++++++++++++-
1 files changed, 14 insertions(+), 1 deletions(-)

diff --git a/drivers/infiniband/hw/hfi1/sysfs.c b/drivers/infiniband/hw/hfi1/sysfs.c
index 836eea5..edba224 100644
--- a/drivers/infiniband/hw/hfi1/sysfs.c
+++ b/drivers/infiniband/hw/hfi1/sysfs.c
@@ -826,12 +826,25 @@ static ssize_t sde_store_cpu_to_sde_map(struct sdma_engine *sde,
return sdma_set_cpu_to_sde_map(sde, buf, count);
}

+static ssize_t sde_show_vl(struct sdma_engine *sde, char *buf)
+{
+ int vl;
+
+ vl = sdma_engine_get_vl(sde);
+ if (vl < 0)
+ return vl;
+
+ return snprintf(buf, PAGE_SIZE, "%d\n", vl);
+}
+
static SDE_ATTR(cpu_list, S_IWUSR | S_IRUGO,
sde_show_cpu_to_sde_map,
sde_store_cpu_to_sde_map);
+static SDE_ATTR(vl, S_IRUGO, sde_show_vl, NULL);

static struct sde_attribute *sde_attribs[] = {
- &sde_attr_cpu_list
+ &sde_attr_cpu_list,
+ &sde_attr_vl