enic: Feature Add: Add loopback capability to enic devices

Hardware has the loopback capability to queue the packets transmitted from
a device to the receive queue of the same device. enic now supports the
loopback capability.

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

1 files changed, 13 insertions, 12 deletions

diff --git a/drivers/net/enic/enic_res.h b/drivers/net/enic/enic_res.h
index 3f6e039c2fd2..8b25a07a67d1 100644
--- a/drivers/net/enic/enic_res.h
+++ b/drivers/net/enic/enic_res.h
@@ -43,7 +43,7 @@ static inline void enic_queue_wq_desc_ex(struct vnic_wq *wq,
         void *os_buf, dma_addr_t dma_addr, unsigned int len,
         unsigned int mss_or_csum_offset, unsigned int hdr_len,
         int vlan_tag_insert, unsigned int vlan_tag,
-        int offload_mode, int cq_entry, int sop, int eop)
+        int offload_mode, int cq_entry, int sop, int eop, int loopback)
 {
         struct wq_enet_desc *desc = vnic_wq_next_desc(wq);
 
@@ -56,61 +56,62 @@ static inline void enic_queue_wq_desc_ex(struct vnic_wq *wq,
                 0, /* fcoe_encap */
                 (u8)vlan_tag_insert,
                 (u16)vlan_tag,
-                0 /* loopback */);
+                (u8)loopback);
 
         vnic_wq_post(wq, os_buf, dma_addr, len, sop, eop);
 }
 
 static inline void enic_queue_wq_desc_cont(struct vnic_wq *wq,
-        void *os_buf, dma_addr_t dma_addr, unsigned int len, int eop)
+        void *os_buf, dma_addr_t dma_addr, unsigned int len,
+        int eop, int loopback)
 {
         enic_queue_wq_desc_ex(wq, os_buf, dma_addr, len,
                 0, 0, 0, 0, 0,
-                eop, 0 /* !SOP */, eop);
+                eop, 0 /* !SOP */, eop, loopback);
 }
 
 static inline void enic_queue_wq_desc(struct vnic_wq *wq, void *os_buf,
         dma_addr_t dma_addr, unsigned int len, int vlan_tag_insert,
-        unsigned int vlan_tag, int eop)
+        unsigned int vlan_tag, int eop, int loopback)
 {
         enic_queue_wq_desc_ex(wq, os_buf, dma_addr, len,
                 0, 0, vlan_tag_insert, vlan_tag,
                 WQ_ENET_OFFLOAD_MODE_CSUM,
-                eop, 1 /* SOP */, eop);
+                eop, 1 /* SOP */, eop, loopback);
 }
 
 static inline void enic_queue_wq_desc_csum(struct vnic_wq *wq,
         void *os_buf, dma_addr_t dma_addr, unsigned int len,
         int ip_csum, int tcpudp_csum, int vlan_tag_insert,
-        unsigned int vlan_tag, int eop)
+        unsigned int vlan_tag, int eop, int loopback)
 {
         enic_queue_wq_desc_ex(wq, os_buf, dma_addr, len,
                 (ip_csum ? 1 : 0) + (tcpudp_csum ? 2 : 0),
                 0, vlan_tag_insert, vlan_tag,
                 WQ_ENET_OFFLOAD_MODE_CSUM,
-                eop, 1 /* SOP */, eop);
+                eop, 1 /* SOP */, eop, loopback);
 }
 
 static inline void enic_queue_wq_desc_csum_l4(struct vnic_wq *wq,
         void *os_buf, dma_addr_t dma_addr, unsigned int len,
         unsigned int csum_offset, unsigned int hdr_len,
-        int vlan_tag_insert, unsigned int vlan_tag, int eop)
+        int vlan_tag_insert, unsigned int vlan_tag, int eop, int loopback)
 {
         enic_queue_wq_desc_ex(wq, os_buf, dma_addr, len,
                 csum_offset, hdr_len, vlan_tag_insert, vlan_tag,
                 WQ_ENET_OFFLOAD_MODE_CSUM_L4,
-                eop, 1 /* SOP */, eop);
+                eop, 1 /* SOP */, eop, loopback);
 }
 
 static inline void enic_queue_wq_desc_tso(struct vnic_wq *wq,
         void *os_buf, dma_addr_t dma_addr, unsigned int len,
         unsigned int mss, unsigned int hdr_len, int vlan_tag_insert,
-        unsigned int vlan_tag, int eop)
+        unsigned int vlan_tag, int eop, int loopback)
 {
         enic_queue_wq_desc_ex(wq, os_buf, dma_addr, len,
                 mss, hdr_len, vlan_tag_insert, vlan_tag,
                 WQ_ENET_OFFLOAD_MODE_TSO,
-                eop, 1 /* SOP */, eop);
+                eop, 1 /* SOP */, eop, loopback);
 }
 
 static inline void enic_queue_rq_desc(struct vnic_rq *rq,