Commit 6247e086 authored by Yi Zou's avatar Yi Zou Committed by Jeff Kirsher

net: add ndo_fcoe_ddp_target() to support FCoE DDP in target mode

The Fiber Channel over Ethernet (FCoE) Direct Data Placement (DDP) can also be
used for FCoE target, where the DDP used for read I/O on an initiator can be
used on an FCoE target to speed up the write I/O to the target from the initiator.
The added ndo_fcoe_ddp_target() works in the similar way as the existing
ndo_fcoe_ddp_setup() to allow the underlying hardware set up the DDP context
accordingly when it gets called from the FCoE target implementation on top
the existing Open-FCoE fcoe/libfc protocol stack so without losing the ability
to provide DDP for read I/O as an initiator, it can also provide DDP offload
to the write I/O coming from the initiator as a target.
Signed-off-by: default avatarYi Zou <yi.zou@intel.com>
Signed-off-by: default avatarKiran Patil <kiran.patil@intel.com>
Tested-by: default avatarKavindya Deegala <kavindya.s.deegala@intel.com>
Signed-off-by: default avatarJeff Kirsher <jeffrey.t.kirsher@intel.com>
parent 90827996
...@@ -871,6 +871,10 @@ struct net_device_ops { ...@@ -871,6 +871,10 @@ struct net_device_ops {
unsigned int sgc); unsigned int sgc);
int (*ndo_fcoe_ddp_done)(struct net_device *dev, int (*ndo_fcoe_ddp_done)(struct net_device *dev,
u16 xid); u16 xid);
int (*ndo_fcoe_ddp_target)(struct net_device *dev,
u16 xid,
struct scatterlist *sgl,
unsigned int sgc);
#define NETDEV_FCOE_WWNN 0 #define NETDEV_FCOE_WWNN 0
#define NETDEV_FCOE_WWPN 1 #define NETDEV_FCOE_WWPN 1
int (*ndo_fcoe_get_wwn)(struct net_device *dev, int (*ndo_fcoe_get_wwn)(struct net_device *dev,
......
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