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/**********************************************************************
* Author: Cavium, Inc.
*
* Contact: support@cavium.com
* Please include "LiquidIO" in the subject.
*
* Copyright (c) 2003-2015 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.
*
* This file may also be available under a different license from Cavium.
* Contact Cavium, Inc. for more information
**********************************************************************/
#include <linux/interrupt.h>
#include <linux/pci.h>
#include <linux/netdevice.h>
#include "liquidio_common.h"
#include "octeon_droq.h"
#include "octeon_iq.h"
#include "response_manager.h"
#include "octeon_device.h"
#include "octeon_nic.h"
#include "octeon_main.h"
void *
octeon_alloc_soft_command_resp(struct octeon_device *oct,
union octeon_instr_64B *cmd,
u32 rdatasize)
{
struct octeon_soft_command *sc;
struct octeon_instr_ih2 *ih2;
struct octeon_instr_irh *irh;
struct octeon_instr_rdp *rdp;
sc = (struct octeon_soft_command *)
octeon_alloc_soft_command(oct, 0, rdatasize, 0);
if (!sc)
return NULL;
/* Copy existing command structure into the soft command */
memcpy(&sc->cmd, cmd, sizeof(union octeon_instr_64B));
/* Add in the response related fields. Opcode and Param are already
* there.
*/
ih2 = (struct octeon_instr_ih2 *)&sc->cmd.cmd2.ih2;
rdp = (struct octeon_instr_rdp *)&sc->cmd.cmd2.rdp;
irh = (struct octeon_instr_irh *)&sc->cmd.cmd2.irh;
ih2->fsz = 40; /* irh + ossp[0] + ossp[1] + rdp + rptr = 40 bytes */
irh->rflag = 1; /* a response is required */
rdp->pcie_port = oct->pcie_port;
rdp->rlen = rdatasize;
*sc->status_word = COMPLETION_WORD_INIT;
sc->cmd.cmd2.rptr = sc->dmarptr;
sc->wait_time = 1000;
sc->timeout = jiffies + sc->wait_time;
return sc;
}
int octnet_send_nic_data_pkt(struct octeon_device *oct,
struct octnic_data_pkt *ndata,
u32 xmit_more)
{
int ring_doorbell;
ring_doorbell = !xmit_more;
return octeon_send_command(oct, ndata->q_no, ring_doorbell, &ndata->cmd,
ndata->buf, ndata->datasize,
ndata->reqtype);
}
static void octnet_link_ctrl_callback(struct octeon_device *oct,
u32 status,
void *sc_ptr)
{
struct octeon_soft_command *sc = (struct octeon_soft_command *)sc_ptr;
struct octnic_ctrl_pkt *nctrl;
nctrl = (struct octnic_ctrl_pkt *)sc->ctxptr;
/* Call the callback function if status is OK.
* Status is OK only if a response was expected and core returned
* success.
* If no response was expected, status is OK if the command was posted
* successfully.
*/
if (!status && nctrl->cb_fn)
nctrl->cb_fn(nctrl);
octeon_free_soft_command(oct, sc);
}
static inline struct octeon_soft_command
*octnic_alloc_ctrl_pkt_sc(struct octeon_device *oct,
struct octnic_ctrl_pkt *nctrl)
{
struct octeon_soft_command *sc = NULL;
u8 *data;
u32 rdatasize;
u32 uddsize = 0, datasize = 0;
uddsize = (u32)(nctrl->ncmd.s.more * 8);
datasize = OCTNET_CMD_SIZE + uddsize;
rdatasize = (nctrl->wait_time) ? 16 : 0;
sc = (struct octeon_soft_command *)
octeon_alloc_soft_command(oct, datasize, rdatasize,
sizeof(struct octnic_ctrl_pkt));
if (!sc)
return NULL;
memcpy(sc->ctxptr, nctrl, sizeof(struct octnic_ctrl_pkt));
data = (u8 *)sc->virtdptr;
memcpy(data, &nctrl->ncmd, OCTNET_CMD_SIZE);
octeon_swap_8B_data((u64 *)data, (OCTNET_CMD_SIZE >> 3));
if (uddsize) {
/* Endian-Swap for UDD should have been done by caller. */
memcpy(data + OCTNET_CMD_SIZE, nctrl->udd, uddsize);
}
sc->iq_no = (u32)nctrl->iq_no;
octeon_prepare_soft_command(oct, sc, OPCODE_NIC, OPCODE_NIC_CMD,
0, 0, 0);
sc->callback = octnet_link_ctrl_callback;
sc->callback_arg = sc;
sc->wait_time = nctrl->wait_time;
return sc;
}
int
octnet_send_nic_ctrl_pkt(struct octeon_device *oct,
struct octnic_ctrl_pkt *nctrl)
{
int retval;
struct octeon_soft_command *sc = NULL;
spin_lock_bh(&oct->cmd_resp_wqlock);
/* Allow only rx ctrl command to stop traffic on the chip
* during offline operations
*/
if ((oct->cmd_resp_state == OCT_DRV_OFFLINE) &&
(nctrl->ncmd.s.cmd != OCTNET_CMD_RX_CTL)) {
spin_unlock_bh(&oct->cmd_resp_wqlock);
dev_err(&oct->pci_dev->dev,
"%s cmd:%d not processed since driver offline\n",
__func__, nctrl->ncmd.s.cmd);
return -1;
}
sc = octnic_alloc_ctrl_pkt_sc(oct, nctrl);
if (!sc) {
dev_err(&oct->pci_dev->dev, "%s soft command alloc failed\n",
__func__);
spin_unlock_bh(&oct->cmd_resp_wqlock);
return -1;
}
retval = octeon_send_soft_command(oct, sc);
if (retval == IQ_SEND_FAILED) {
octeon_free_soft_command(oct, sc);
dev_err(&oct->pci_dev->dev, "%s soft command:%d send failed status: %x\n",
__func__, nctrl->ncmd.s.cmd, retval);
spin_unlock_bh(&oct->cmd_resp_wqlock);
return -1;
}
spin_unlock_bh(&oct->cmd_resp_wqlock);
return retval;
}
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