295 lines
8.0 KiB
C
295 lines
8.0 KiB
C
/**********************************************************************
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* Author: Cavium, Inc.
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*
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* Contact: support@cavium.com
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* Please include "LiquidIO" in the subject.
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*
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* Copyright (c) 2003-2016 Cavium, Inc.
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*
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* This file is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License, Version 2, as
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* published by the Free Software Foundation.
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*
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* This file is distributed in the hope that it will be useful, but
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* AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
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* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
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* NONINFRINGEMENT. See the GNU General Public License for more
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* details.
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**********************************************************************/
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/*! \file octeon_nic.h
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* \brief Host NIC Driver: Routine to send network data &
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* control packet to Octeon.
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*/
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#ifndef __OCTEON_NIC_H__
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#define __OCTEON_NIC_H__
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/* Maximum number of 8-byte words can be sent in a NIC control message.
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*/
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#define MAX_NCTRL_UDD 32
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typedef void (*octnic_ctrl_pkt_cb_fn_t) (void *);
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/* Structure of control information passed by the NIC module to the OSI
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* layer when sending control commands to Octeon device software.
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*/
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struct octnic_ctrl_pkt {
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/** Command to be passed to the Octeon device software. */
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union octnet_cmd ncmd;
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/** Send buffer */
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void *data;
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u64 dmadata;
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/** Response buffer */
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void *rdata;
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u64 dmardata;
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/** Additional data that may be needed by some commands. */
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u64 udd[MAX_NCTRL_UDD];
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/** Input queue to use to send this command. */
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u64 iq_no;
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/** Time to wait for Octeon software to respond to this control command.
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* If wait_time is 0, OSI assumes no response is expected.
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*/
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size_t wait_time;
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/** The network device that issued the control command. */
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u64 netpndev;
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/** Callback function called when the command has been fetched */
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octnic_ctrl_pkt_cb_fn_t cb_fn;
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u32 status;
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u16 *response_code;
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struct completion *completion;
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};
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#define MAX_UDD_SIZE(nctrl) (sizeof((nctrl)->udd))
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/** Structure of data information passed by the NIC module to the OSI
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* layer when forwarding data to Octeon device software.
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*/
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struct octnic_data_pkt {
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/** Pointer to information maintained by NIC module for this packet. The
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* OSI layer passes this as-is to the driver.
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*/
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void *buf;
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/** Type of buffer passed in "buf" above. */
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u32 reqtype;
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/** Total data bytes to be transferred in this command. */
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u32 datasize;
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/** Command to be passed to the Octeon device software. */
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union octeon_instr_64B cmd;
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/** Input queue to use to send this command. */
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u32 q_no;
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};
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/** Structure passed by NIC module to OSI layer to prepare a command to send
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* network data to Octeon.
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*/
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union octnic_cmd_setup {
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struct {
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u32 iq_no:8;
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u32 gather:1;
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u32 timestamp:1;
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u32 ip_csum:1;
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u32 transport_csum:1;
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u32 tnl_csum:1;
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u32 rsvd:19;
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union {
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u32 datasize;
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u32 gatherptrs;
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} u;
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} s;
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u64 u64;
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};
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static inline int octnet_iq_is_full(struct octeon_device *oct, u32 q_no)
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{
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return ((u32)atomic_read(&oct->instr_queue[q_no]->instr_pending)
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>= (oct->instr_queue[q_no]->max_count - 2));
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}
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static inline void
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octnet_prepare_pci_cmd_o2(struct octeon_device *oct,
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union octeon_instr_64B *cmd,
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union octnic_cmd_setup *setup, u32 tag)
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{
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struct octeon_instr_ih2 *ih2;
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struct octeon_instr_irh *irh;
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union octnic_packet_params packet_params;
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int port;
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memset(cmd, 0, sizeof(union octeon_instr_64B));
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ih2 = (struct octeon_instr_ih2 *)&cmd->cmd2.ih2;
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/* assume that rflag is cleared so therefore front data will only have
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* irh and ossp[0], ossp[1] for a total of 32 bytes
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*/
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ih2->fsz = LIO_PCICMD_O2;
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ih2->tagtype = ORDERED_TAG;
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ih2->grp = DEFAULT_POW_GRP;
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port = (int)oct->instr_queue[setup->s.iq_no]->txpciq.s.port;
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if (tag)
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ih2->tag = tag;
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else
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ih2->tag = LIO_DATA(port);
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ih2->raw = 1;
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ih2->qos = (port & 3) + 4; /* map qos based on interface */
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if (!setup->s.gather) {
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ih2->dlengsz = setup->s.u.datasize;
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} else {
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ih2->gather = 1;
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ih2->dlengsz = setup->s.u.gatherptrs;
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}
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irh = (struct octeon_instr_irh *)&cmd->cmd2.irh;
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irh->opcode = OPCODE_NIC;
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irh->subcode = OPCODE_NIC_NW_DATA;
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packet_params.u32 = 0;
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packet_params.s.ip_csum = setup->s.ip_csum;
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packet_params.s.transport_csum = setup->s.transport_csum;
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packet_params.s.tnl_csum = setup->s.tnl_csum;
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packet_params.s.tsflag = setup->s.timestamp;
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irh->ossp = packet_params.u32;
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}
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static inline void
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octnet_prepare_pci_cmd_o3(struct octeon_device *oct,
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union octeon_instr_64B *cmd,
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union octnic_cmd_setup *setup, u32 tag)
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{
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struct octeon_instr_irh *irh;
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struct octeon_instr_ih3 *ih3;
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struct octeon_instr_pki_ih3 *pki_ih3;
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union octnic_packet_params packet_params;
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int port;
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memset(cmd, 0, sizeof(union octeon_instr_64B));
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ih3 = (struct octeon_instr_ih3 *)&cmd->cmd3.ih3;
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pki_ih3 = (struct octeon_instr_pki_ih3 *)&cmd->cmd3.pki_ih3;
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/* assume that rflag is cleared so therefore front data will only have
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* irh and ossp[1] and ossp[2] for a total of 24 bytes
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*/
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ih3->pkind = oct->instr_queue[setup->s.iq_no]->txpciq.s.pkind;
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/*PKI IH*/
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ih3->fsz = LIO_PCICMD_O3;
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if (!setup->s.gather) {
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ih3->dlengsz = setup->s.u.datasize;
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} else {
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ih3->gather = 1;
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ih3->dlengsz = setup->s.u.gatherptrs;
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}
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pki_ih3->w = 1;
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pki_ih3->raw = 1;
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pki_ih3->utag = 1;
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pki_ih3->utt = 1;
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pki_ih3->uqpg = oct->instr_queue[setup->s.iq_no]->txpciq.s.use_qpg;
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port = (int)oct->instr_queue[setup->s.iq_no]->txpciq.s.port;
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if (tag)
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pki_ih3->tag = tag;
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else
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pki_ih3->tag = LIO_DATA(port);
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pki_ih3->tagtype = ORDERED_TAG;
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pki_ih3->qpg = oct->instr_queue[setup->s.iq_no]->txpciq.s.qpg;
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pki_ih3->pm = 0x7; /*0x7 - meant for Parse nothing, uninterpreted*/
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pki_ih3->sl = 8; /* sl will be sizeof(pki_ih3)*/
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irh = (struct octeon_instr_irh *)&cmd->cmd3.irh;
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irh->opcode = OPCODE_NIC;
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irh->subcode = OPCODE_NIC_NW_DATA;
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packet_params.u32 = 0;
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packet_params.s.ip_csum = setup->s.ip_csum;
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packet_params.s.transport_csum = setup->s.transport_csum;
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packet_params.s.tnl_csum = setup->s.tnl_csum;
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packet_params.s.tsflag = setup->s.timestamp;
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irh->ossp = packet_params.u32;
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}
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/** Utility function to prepare a 64B NIC instruction based on a setup command
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* @param cmd - pointer to instruction to be filled in.
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* @param setup - pointer to the setup structure
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* @param q_no - which queue for back pressure
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*
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* Assumes the cmd instruction is pre-allocated, but no fields are filled in.
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*/
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static inline void
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octnet_prepare_pci_cmd(struct octeon_device *oct, union octeon_instr_64B *cmd,
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union octnic_cmd_setup *setup, u32 tag)
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{
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if (OCTEON_CN6XXX(oct))
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octnet_prepare_pci_cmd_o2(oct, cmd, setup, tag);
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else
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octnet_prepare_pci_cmd_o3(oct, cmd, setup, tag);
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}
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/** Allocate and a soft command with space for a response immediately following
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* the commnad.
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* @param oct - octeon device pointer
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* @param cmd - pointer to the command structure, pre-filled for everything
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* except the response.
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* @param rdatasize - size in bytes of the response.
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*
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* @returns pointer to allocated buffer with command copied into it, and
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* response space immediately following.
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*/
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void *
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octeon_alloc_soft_command_resp(struct octeon_device *oct,
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union octeon_instr_64B *cmd,
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u32 rdatasize);
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/** Send a NIC data packet to the device
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* @param oct - octeon device pointer
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* @param ndata - control structure with queueing, and buffer information
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*
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* @returns IQ_FAILED if it failed to add to the input queue. IQ_STOP if it the
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* queue should be stopped, and IQ_SEND_OK if it sent okay.
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*/
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int octnet_send_nic_data_pkt(struct octeon_device *oct,
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struct octnic_data_pkt *ndata);
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/** Send a NIC control packet to the device
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* @param oct - octeon device pointer
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* @param nctrl - control structure with command, timout, and callback info
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* @returns IQ_FAILED if it failed to add to the input queue. IQ_STOP if it the
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* queue should be stopped, and IQ_SEND_OK if it sent okay.
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*/
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int
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octnet_send_nic_ctrl_pkt(struct octeon_device *oct,
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struct octnic_ctrl_pkt *nctrl);
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#endif
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