intel/ixgbe/ixgbe_fcoe.c

34  * ixgbe_fcoe_ddp_put - free the ddp context for a given xid
36  * @xid: the xid that corresponding ddp will be freed
44 int ixgbe_fcoe_ddp_put(struct net_device *netdev, u16 xid)
56 	if (xid >= netdev->fcoe_ddp_xid)
61 	ddp = &fcoe->ddp[xid];
74 		IXGBE_WRITE_REG(hw, IXGBE_FCDFC(0, xid), 0);
75 		IXGBE_WRITE_REG(hw, IXGBE_FCDFC(3, xid),
76 				(xid | IXGBE_FCFLTRW_WE));
79 		IXGBE_WRITE_REG(hw, IXGBE_FCDDC(2, xid), 0);
82 		IXGBE_WRITE_REG(hw, IXGBE_FCDDC(3, xid),
83 				(xid | IXGBE_FCDMARW_WE));
86 		IXGBE_WRITE_REG(hw, IXGBE_FCDDC(3, xid),
87 				(xid | IXGBE_FCDMARW_RE));
88 		fcbuff = IXGBE_READ_REG(hw, IXGBE_FCDDC(2, xid));
94 				(xid | IXGBE_FCFLTRW_WE));
97 				(xid | IXGBE_FCDMARW_WE));
101 				(xid | IXGBE_FCDMARW_RE));
126  * @xid: the exchange id requesting ddp
133 static int ixgbe_fcoe_ddp_setup(struct net_device *netdev, u16 xid,
157 	if (xid >= netdev->fcoe_ddp_xid) {
158 		e_warn(drv, "xid=0x%x out-of-range\n", xid);
168 	ddp = &fcoe->ddp[xid];
170 		e_err(drv, "xid 0x%x w/ non-null sgl=%p nents=%d\n",
171 		      xid, ddp->sgl, ddp->sgc);
184 		e_warn(drv, "xid=0x%x no ddp pool for fcoe\n", xid);
191 		e_err(drv, "xid 0x%x DMA map error\n", xid);
270 	fcdmarw = xid;
274 	fcfltrw = xid;
292 		IXGBE_WRITE_REG(hw, IXGBE_FCDDC(0, xid),
294 		IXGBE_WRITE_REG(hw, IXGBE_FCDDC(1, xid), (u64)ddp->udp >> 32);
295 		IXGBE_WRITE_REG(hw, IXGBE_FCDDC(2, xid), fcbuff);
296 		IXGBE_WRITE_REG(hw, IXGBE_FCDDC(3, xid), fcdmarw);
298 		IXGBE_WRITE_REG(hw, IXGBE_FCDFC(0, xid), IXGBE_FCFLT_VALID);
299 		IXGBE_WRITE_REG(hw, IXGBE_FCDFC(1, xid), 0);
300 		IXGBE_WRITE_REG(hw, IXGBE_FCDFC(3, xid), fcfltrw);
333  * @xid: the exchange id requesting ddp
339  * to set up ddp for the corresponding xid of the given sglist for
344 int ixgbe_fcoe_ddp_get(struct net_device *netdev, u16 xid,
347 	return ixgbe_fcoe_ddp_setup(netdev, xid, sgl, sgc, 0);
353  * @xid: the exchange id requesting ddp
359  * to set up ddp for the corresponding xid of the given sglist for
365 int ixgbe_fcoe_ddp_target(struct net_device *netdev, u16 xid,
368 	return ixgbe_fcoe_ddp_setup(netdev, xid, sgl, sgc, 1);
396 	u16 xid;
412 		xid =  be16_to_cpu(fh->fh_ox_id);
414 		xid =  be16_to_cpu(fh->fh_rx_id);
420 	if (xid >= ddp_max)
424 	ddp = &fcoe->ddp[xid];