/********************************************************************** * Author: Cavium, Inc. * * Contact: support@cavium.com * Please include "LiquidIO" in the subject. * * Copyright (c) 2003-2016 Cavium, Inc. * * This file is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License, Version 2, as * published by the Free Software Foundation. * * This file is distributed in the hope that it will be useful, but * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or * NONINFRINGEMENT. See the GNU General Public License for more * details.
**********************************************************************/
/*! \file octeon_nic.h * \brief Host NIC Driver: Routine to send network data & * control packet to Octeon.
*/
#ifndef __OCTEON_NIC_H__ #define __OCTEON_NIC_H__
/* Maximum number of 8-byte words can be sent in a NIC control message.
*/ #define MAX_NCTRL_UDD 32
typedefvoid (*octnic_ctrl_pkt_cb_fn_t) (void *);
/* Structure of control information passed by the NIC module to the OSI * layer when sending control commands to Octeon device software.
*/ struct octnic_ctrl_pkt { /** Command to be passed to the Octeon device software. */ union octnet_cmd ncmd;
/** Send buffer */ void *data;
u64 dmadata;
/** Response buffer */ void *rdata;
u64 dmardata;
/** Additional data that may be needed by some commands. */
u64 udd[MAX_NCTRL_UDD];
/** Input queue to use to send this command. */
u64 iq_no;
/** The network device that issued the control command. */
u64 netpndev;
/** Callback function called when the command has been fetched */
octnic_ctrl_pkt_cb_fn_t cb_fn;
/** Structure of data information passed by the NIC module to the OSI * layer when forwarding data to Octeon device software.
*/ struct octnic_data_pkt { /** Pointer to information maintained by NIC module for this packet. The * OSI layer passes this as-is to the driver.
*/ void *buf;
/** Type of buffer passed in "buf" above. */
u32 reqtype;
/** Total data bytes to be transferred in this command. */
u32 datasize;
/** Command to be passed to the Octeon device software. */ union octeon_instr_64B cmd;
/** Input queue to use to send this command. */
u32 q_no;
};
/** Structure passed by NIC module to OSI layer to prepare a command to send * network data to Octeon.
*/ union octnic_cmd_setup { struct {
u32 iq_no:8;
u32 gather:1;
u32 timestamp:1;
u32 ip_csum:1;
u32 transport_csum:1;
u32 tnl_csum:1;
u32 rsvd:19;
/* assume that rflag is cleared so therefore front data will only have * irh and ossp[1] and ossp[2] for a total of 24 bytes
*/
ih3->pkind = oct->instr_queue[setup->s.iq_no]->txpciq.s.pkind; /*PKI IH*/
ih3->fsz = LIO_PCICMD_O3;
/** Utility function to prepare a 64B NIC instruction based on a setup command * @param cmd - pointer to instruction to be filled in. * @param setup - pointer to the setup structure * @param q_no - which queue for back pressure * * Assumes the cmd instruction is pre-allocated, but no fields are filled in.
*/ staticinlinevoid
octnet_prepare_pci_cmd(struct octeon_device *oct, union octeon_instr_64B *cmd, union octnic_cmd_setup *setup, u32 tag)
{ if (OCTEON_CN6XXX(oct))
octnet_prepare_pci_cmd_o2(oct, cmd, setup, tag); else
octnet_prepare_pci_cmd_o3(oct, cmd, setup, tag);
}
/** Allocate and a soft command with space for a response immediately following * the commnad. * @param oct - octeon device pointer * @param cmd - pointer to the command structure, pre-filled for everything * except the response. * @param rdatasize - size in bytes of the response. * * @returns pointer to allocated buffer with command copied into it, and * response space immediately following.
*/ void *
octeon_alloc_soft_command_resp(struct octeon_device *oct, union octeon_instr_64B *cmd,
u32 rdatasize);
/** Send a NIC data packet to the device * @param oct - octeon device pointer * @param ndata - control structure with queueing, and buffer information * * @returns IQ_FAILED if it failed to add to the input queue. IQ_STOP if the * queue should be stopped, and IQ_SEND_OK if it sent okay.
*/ int octnet_send_nic_data_pkt(struct octeon_device *oct, struct octnic_data_pkt *ndata, int xmit_more);
/** Send a NIC control packet to the device * @param oct - octeon device pointer * @param nctrl - control structure with command, timout, and callback info * @returns IQ_FAILED if it failed to add to the input queue. IQ_STOP if the * queue should be stopped, and IQ_SEND_OK if it sent okay.
*/ int
octnet_send_nic_ctrl_pkt(struct octeon_device *oct, struct octnic_ctrl_pkt *nctrl);
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