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Release 4.11 drivers/net/ethernet/cavium/liquidio/octeon_mailbox.c

/**********************************************************************
 * 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.
 ***********************************************************************/
#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_main.h"
#include "octeon_mailbox.h"

/**
 * octeon_mbox_read:
 * @oct: Pointer mailbox
 *
 * Reads the 8-bytes of data from the mbox register
 * Writes back the acknowldgement inidcating completion of read
 */

int octeon_mbox_read(struct octeon_mbox *mbox) { union octeon_mbox_message msg; int ret = 0; spin_lock(&mbox->lock); msg.u64 = readq(mbox->mbox_read_reg); if ((msg.u64 == OCTEON_PFVFACK) || (msg.u64 == OCTEON_PFVFSIG)) { spin_unlock(&mbox->lock); return 0; } if (mbox->state & OCTEON_MBOX_STATE_REQUEST_RECEIVING) { mbox->mbox_req.data[mbox->mbox_req.recv_len - 1] = msg.u64; mbox->mbox_req.recv_len++; } else { if (mbox->state & OCTEON_MBOX_STATE_RESPONSE_RECEIVING) { mbox->mbox_resp.data[mbox->mbox_resp.recv_len - 1] = msg.u64; mbox->mbox_resp.recv_len++; } else { if ((mbox->state & OCTEON_MBOX_STATE_IDLE) && (msg.s.type == OCTEON_MBOX_REQUEST)) { mbox->state &= ~OCTEON_MBOX_STATE_IDLE; mbox->state |= OCTEON_MBOX_STATE_REQUEST_RECEIVING; mbox->mbox_req.msg.u64 = msg.u64; mbox->mbox_req.q_no = mbox->q_no; mbox->mbox_req.recv_len = 1; } else { if ((mbox->state & OCTEON_MBOX_STATE_RESPONSE_PENDING) && (msg.s.type == OCTEON_MBOX_RESPONSE)) { mbox->state &= ~OCTEON_MBOX_STATE_RESPONSE_PENDING; mbox->state |= OCTEON_MBOX_STATE_RESPONSE_RECEIVING ; mbox->mbox_resp.msg.u64 = msg.u64; mbox->mbox_resp.q_no = mbox->q_no; mbox->mbox_resp.recv_len = 1; } else { writeq(OCTEON_PFVFERR, mbox->mbox_read_reg); mbox->state |= OCTEON_MBOX_STATE_ERROR; spin_unlock(&mbox->lock); return 1; } } } } if (mbox->state & OCTEON_MBOX_STATE_REQUEST_RECEIVING) { if (mbox->mbox_req.recv_len < msg.s.len) { ret = 0; } else { mbox->state &= ~OCTEON_MBOX_STATE_REQUEST_RECEIVING; mbox->state |= OCTEON_MBOX_STATE_REQUEST_RECEIVED; ret = 1; } } else { if (mbox->state & OCTEON_MBOX_STATE_RESPONSE_RECEIVING) { if (mbox->mbox_resp.recv_len < msg.s.len) { ret = 0; } else { mbox->state &= ~OCTEON_MBOX_STATE_RESPONSE_RECEIVING; mbox->state |= OCTEON_MBOX_STATE_RESPONSE_RECEIVED; ret = 1; } } else { WARN_ON(1); } } writeq(OCTEON_PFVFACK, mbox->mbox_read_reg); spin_unlock(&mbox->lock); return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Raghu Vatsavayi440100.00%1100.00%
Total440100.00%1100.00%

/** * octeon_mbox_write: * @oct: Pointer Octeon Device * @mbox_cmd: Cmd to send to mailbox. * * Populates the queue specific mbox structure * with cmd information. * Write the cmd to mbox register */
int octeon_mbox_write(struct octeon_device *oct, struct octeon_mbox_cmd *mbox_cmd) { struct octeon_mbox *mbox = oct->mbox[mbox_cmd->q_no]; u32 count, i, ret = OCTEON_MBOX_STATUS_SUCCESS; long timeout = LIO_MBOX_WRITE_WAIT_TIME; unsigned long flags; spin_lock_irqsave(&mbox->lock, flags); if ((mbox_cmd->msg.s.type == OCTEON_MBOX_RESPONSE) && !(mbox->state & OCTEON_MBOX_STATE_REQUEST_RECEIVED)) { spin_unlock_irqrestore(&mbox->lock, flags); return OCTEON_MBOX_STATUS_FAILED; } if ((mbox_cmd->msg.s.type == OCTEON_MBOX_REQUEST) && !(mbox->state & OCTEON_MBOX_STATE_IDLE)) { spin_unlock_irqrestore(&mbox->lock, flags); return OCTEON_MBOX_STATUS_BUSY; } if (mbox_cmd->msg.s.type == OCTEON_MBOX_REQUEST) { memcpy(&mbox->mbox_resp, mbox_cmd, sizeof(struct octeon_mbox_cmd)); mbox->state = OCTEON_MBOX_STATE_RESPONSE_PENDING; } spin_unlock_irqrestore(&mbox->lock, flags); count = 0; while (readq(mbox->mbox_write_reg) != OCTEON_PFVFSIG) { schedule_timeout_uninterruptible(timeout); if (count++ == LIO_MBOX_WRITE_WAIT_CNT) { ret = OCTEON_MBOX_STATUS_FAILED; break; } } if (ret == OCTEON_MBOX_STATUS_SUCCESS) { writeq(mbox_cmd->msg.u64, mbox->mbox_write_reg); for (i = 0; i < (u32)(mbox_cmd->msg.s.len - 1); i++) { count = 0; while (readq(mbox->mbox_write_reg) != OCTEON_PFVFACK) { schedule_timeout_uninterruptible(timeout); if (count++ == LIO_MBOX_WRITE_WAIT_CNT) { ret = OCTEON_MBOX_STATUS_FAILED; break; } } writeq(mbox_cmd->data[i], mbox->mbox_write_reg); } } spin_lock_irqsave(&mbox->lock, flags); if (mbox_cmd->msg.s.type == OCTEON_MBOX_RESPONSE) { mbox->state = OCTEON_MBOX_STATE_IDLE; writeq(OCTEON_PFVFSIG, mbox->mbox_read_reg); } else { if ((!mbox_cmd->msg.s.resp_needed) || (ret == OCTEON_MBOX_STATUS_FAILED)) { mbox->state &= ~OCTEON_MBOX_STATE_RESPONSE_PENDING; if (!(mbox->state & (OCTEON_MBOX_STATE_REQUEST_RECEIVING | OCTEON_MBOX_STATE_REQUEST_RECEIVED))) mbox->state = OCTEON_MBOX_STATE_IDLE; } } spin_unlock_irqrestore(&mbox->lock, flags); return ret; }

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PersonTokensPropCommitsCommitProp
Raghu Vatsavayi41198.33%150.00%
Prasad Kanneganti71.67%150.00%
Total418100.00%2100.00%

/** * octeon_mbox_process_cmd: * @mbox: Pointer mailbox * @mbox_cmd: Pointer to command received * * Process the cmd received in mbox */
static int octeon_mbox_process_cmd(struct octeon_mbox *mbox, struct octeon_mbox_cmd *mbox_cmd) { struct octeon_device *oct = mbox->oct_dev; switch (mbox_cmd->msg.s.cmd) { case OCTEON_VF_ACTIVE: dev_dbg(&oct->pci_dev->dev, "got vfactive sending data back\n"); mbox_cmd->msg.s.type = OCTEON_MBOX_RESPONSE; mbox_cmd->msg.s.resp_needed = 1; mbox_cmd->msg.s.len = 2; mbox_cmd->data[0] = 0; /* VF version is in mbox_cmd->data[0] */ ((struct lio_version *)&mbox_cmd->data[0])->major = LIQUIDIO_BASE_MAJOR_VERSION; ((struct lio_version *)&mbox_cmd->data[0])->minor = LIQUIDIO_BASE_MINOR_VERSION; ((struct lio_version *)&mbox_cmd->data[0])->micro = LIQUIDIO_BASE_MICRO_VERSION; memcpy(mbox_cmd->msg.s.params, (uint8_t *)&oct->pfvf_hsword, 6); /* Sending core cofig info to the corresponding active VF.*/ octeon_mbox_write(oct, mbox_cmd); break; case OCTEON_VF_FLR_REQUEST: dev_info(&oct->pci_dev->dev, "got a request for FLR from VF that owns DPI ring %u\n", mbox->q_no); pcie_capability_set_word( oct->sriov_info.dpiring_to_vfpcidev_lut[mbox->q_no], PCI_EXP_DEVCTL, PCI_EXP_DEVCTL_BCR_FLR); break; case OCTEON_PF_CHANGED_VF_MACADDR: if (OCTEON_CN23XX_VF(oct)) octeon_pf_changed_vf_macaddr(oct, mbox_cmd->msg.s.params); break; default: break; } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Raghu Vatsavayi247100.00%1100.00%
Total247100.00%1100.00%

/** *octeon_mbox_process_message: * * Process the received mbox message. */
int octeon_mbox_process_message(struct octeon_mbox *mbox) { struct octeon_mbox_cmd mbox_cmd; unsigned long flags; spin_lock_irqsave(&mbox->lock, flags); if (mbox->state & OCTEON_MBOX_STATE_ERROR) { if (mbox->state & (OCTEON_MBOX_STATE_RESPONSE_PENDING | OCTEON_MBOX_STATE_RESPONSE_RECEIVING)) { memcpy(&mbox_cmd, &mbox->mbox_resp, sizeof(struct octeon_mbox_cmd)); mbox->state = OCTEON_MBOX_STATE_IDLE; writeq(OCTEON_PFVFSIG, mbox->mbox_read_reg); spin_unlock_irqrestore(&mbox->lock, flags); mbox_cmd.recv_status = 1; if (mbox_cmd.fn) mbox_cmd.fn(mbox->oct_dev, &mbox_cmd, mbox_cmd.fn_arg); return 0; } mbox->state = OCTEON_MBOX_STATE_IDLE; writeq(OCTEON_PFVFSIG, mbox->mbox_read_reg); spin_unlock_irqrestore(&mbox->lock, flags); return 0; } if (mbox->state & OCTEON_MBOX_STATE_RESPONSE_RECEIVED) { memcpy(&mbox_cmd, &mbox->mbox_resp, sizeof(struct octeon_mbox_cmd)); mbox->state = OCTEON_MBOX_STATE_IDLE; writeq(OCTEON_PFVFSIG, mbox->mbox_read_reg); spin_unlock_irqrestore(&mbox->lock, flags); mbox_cmd.recv_status = 0; if (mbox_cmd.fn) mbox_cmd.fn(mbox->oct_dev, &mbox_cmd, mbox_cmd.fn_arg); return 0; } if (mbox->state & OCTEON_MBOX_STATE_REQUEST_RECEIVED) { memcpy(&mbox_cmd, &mbox->mbox_req, sizeof(struct octeon_mbox_cmd)); if (!mbox_cmd.msg.s.resp_needed) { mbox->state &= ~OCTEON_MBOX_STATE_REQUEST_RECEIVED; if (!(mbox->state & OCTEON_MBOX_STATE_RESPONSE_PENDING)) mbox->state = OCTEON_MBOX_STATE_IDLE; writeq(OCTEON_PFVFSIG, mbox->mbox_read_reg); } spin_unlock_irqrestore(&mbox->lock, flags); octeon_mbox_process_cmd(mbox, &mbox_cmd); return 0; } WARN_ON(1); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Raghu Vatsavayi33799.70%150.00%
Dan Carpenter10.30%150.00%
Total338100.00%2100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Raghu Vatsavayi146799.46%133.33%
Prasad Kanneganti70.47%133.33%
Dan Carpenter10.07%133.33%
Total1475100.00%3100.00%
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