enic: feature add: add ethtool -c/C support

Only rx_usec and tx_usec options for ethtool -C are settable as those
are the only settings that make sense to HW.  Adds driver reporting of
intr coalescing timer value in usec units rather than HW units.

Signed-off-by: Vasanthy Kolluri <vkolluri@cisco.com>
Signed-off-by: Scott Feldman <scofeldm@cisco.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 7 insertions, 5 deletions

diff --git a/drivers/net/enic/enic_res.c b/drivers/net/enic/enic_res.c
index a605da1475c6..02839bf0fe8b 100644
--- a/drivers/net/enic/enic_res.c
+++ b/drivers/net/enic/enic_res.c
@@ -66,9 +66,9 @@ int enic_get_vnic_config(struct enic *enic)
         GET_CONFIG(wq_desc_count);
         GET_CONFIG(rq_desc_count);
         GET_CONFIG(mtu);
-        GET_CONFIG(intr_timer);
         GET_CONFIG(intr_timer_type);
         GET_CONFIG(intr_mode);
+        GET_CONFIG(intr_timer_usec);
 
         c->wq_desc_count =
                 min_t(u32, ENIC_MAX_WQ_DESCS,
@@ -88,15 +88,17 @@ int enic_get_vnic_config(struct enic *enic)
                 max_t(u16, ENIC_MIN_MTU,
                 c->mtu));
 
-        c->intr_timer = min_t(u16, VNIC_INTR_TIMER_MAX, c->intr_timer);
+        c->intr_timer_usec = min_t(u32,
+                INTR_COALESCE_HW_TO_USEC(VNIC_INTR_TIMER_MAX),
+                c->intr_timer_usec);
 
         printk(KERN_INFO PFX "vNIC MAC addr %pM wq/rq %d/%d\n",
                 enic->mac_addr, c->wq_desc_count, c->rq_desc_count);
         printk(KERN_INFO PFX "vNIC mtu %d csum tx/rx %d/%d tso/lro %d/%d "
-                "intr timer %d\n",
+                "intr timer %d usec\n",
                 c->mtu, ENIC_SETTING(enic, TXCSUM),
                 ENIC_SETTING(enic, RXCSUM), ENIC_SETTING(enic, TSO),
-                ENIC_SETTING(enic, LRO), c->intr_timer);
+                ENIC_SETTING(enic, LRO), c->intr_timer_usec);
 
         return 0;
 }
@@ -303,7 +305,7 @@ void enic_init_vnic_resources(struct enic *enic)
 
         for (i = 0; i < enic->intr_count; i++) {
                 vnic_intr_init(&enic->intr[i],
-                        enic->config.intr_timer,
+                        INTR_COALESCE_USEC_TO_HW(enic->config.intr_timer_usec),
                         enic->config.intr_timer_type,
                         mask_on_assertion);
         }