/*
 * This file is provided under a dual BSD/GPLv2 license.  When using or
 *   redistributing this file, you may do so under either license.
 *
 *   GPL LICENSE SUMMARY
 *
 *   Copyright(c) 2017 Intel Corporation. All rights reserved.
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of version 2 of the GNU General Public License as
 *   published by the Free Software Foundation.
 *
 *   BSD LICENSE
 *
 *   Copyright(c) 2017 Intel Corporation. All rights reserved.
 *
 *   Redistribution and use in source and binary forms, with or without
 *   modification, are permitted provided that the following conditions
 *   are met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copy
 *       notice, this list of conditions and the following disclaimer in
 *       the documentation and/or other materials provided with the
 *       distribution.
 *     * Neither the name of Intel Corporation nor the names of its
 *       contributors may be used to endorse or promote products derived
 *       from this software without specific prior written permission.
 *
 *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * Intel PCIe GEN3 NTB Linux driver
 *
 */

#include <linux/debugfs.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/random.h>
#include <linux/slab.h>
#include <linux/ntb.h>

#include "ntb_hw_intel.h"
#include "ntb_hw_gen1.h"
#include "ntb_hw_gen3.h"

static int gen3_poll_link(struct intel_ntb_dev *ndev);

static const struct intel_ntb_reg gen3_reg = {
        .poll_link              = gen3_poll_link,
        .link_is_up             = xeon_link_is_up,
        .db_ioread              = gen3_db_ioread,
        .db_iowrite             = gen3_db_iowrite,
        .db_size                = sizeof(u32),
        .ntb_ctl                = GEN3_NTBCNTL_OFFSET,
        .mw_bar                 = {2, 4},
};

static const struct intel_ntb_alt_reg gen3_pri_reg = {
        .db_bell                = GEN3_EM_DOORBELL_OFFSET,
        .db_clear               = GEN3_IM_INT_STATUS_OFFSET,
        .db_mask                = GEN3_IM_INT_DISABLE_OFFSET,
        .spad                   = GEN3_IM_SPAD_OFFSET,
};

static const struct intel_ntb_alt_reg gen3_b2b_reg = {
        .db_bell                = GEN3_IM_DOORBELL_OFFSET,
        .db_clear               = GEN3_EM_INT_STATUS_OFFSET,
        .db_mask                = GEN3_EM_INT_DISABLE_OFFSET,
        .spad                   = GEN3_B2B_SPAD_OFFSET,
};

static const struct intel_ntb_xlat_reg gen3_sec_xlat = {
/*      .bar0_base              = GEN3_EMBAR0_OFFSET, */
        .bar2_limit             = GEN3_IMBAR1XLMT_OFFSET,
        .bar2_xlat              = GEN3_IMBAR1XBASE_OFFSET,
};

static int gen3_poll_link(struct intel_ntb_dev *ndev)
{
        u16 reg_val;
        int rc;

        ndev->reg->db_iowrite(ndev->db_link_mask,
                              ndev->self_mmio +
                              ndev->self_reg->db_clear);

        rc = pci_read_config_word(ndev->ntb.pdev,
                                  GEN3_LINK_STATUS_OFFSET, &reg_val);
        if (rc)
                return 0;

        if (reg_val == ndev->lnk_sta)
                return 0;

        ndev->lnk_sta = reg_val;

        return 1;
}

static int gen3_init_isr(struct intel_ntb_dev *ndev)
{
        int i;

        /*
         * The MSIX vectors and the interrupt status bits are not lined up
         * on Skylake. By default the link status bit is bit 32, however it
         * is by default MSIX vector0. We need to fixup to line them up.
         * The vectors at reset is 1-32,0. We need to reprogram to 0-32.
         */

        for (i = 0; i < GEN3_DB_MSIX_VECTOR_COUNT; i++)
                iowrite8(i, ndev->self_mmio + GEN3_INTVEC_OFFSET + i);

        /* move link status down one as workaround */
        if (ndev->hwerr_flags & NTB_HWERR_MSIX_VECTOR32_BAD) {
                iowrite8(GEN3_DB_MSIX_VECTOR_COUNT - 2,
                         ndev->self_mmio + GEN3_INTVEC_OFFSET +
                         (GEN3_DB_MSIX_VECTOR_COUNT - 1));
        }

        return ndev_init_isr(ndev, GEN3_DB_MSIX_VECTOR_COUNT,
                             GEN3_DB_MSIX_VECTOR_COUNT,
                             GEN3_DB_MSIX_VECTOR_SHIFT,
                             GEN3_DB_TOTAL_SHIFT);
}

static int gen3_setup_b2b_mw(struct intel_ntb_dev *ndev,
                            const struct intel_b2b_addr *addr,
                            const struct intel_b2b_addr *peer_addr)
{
        struct pci_dev *pdev;
        void __iomem *mmio;
        phys_addr_t bar_addr;

        pdev = ndev->ntb.pdev;
        mmio = ndev->self_mmio;

        /* setup incoming bar limits == base addrs (zero length windows) */
        bar_addr = addr->bar2_addr64;
        iowrite64(bar_addr, mmio + GEN3_IMBAR1XLMT_OFFSET);
        bar_addr = ioread64(mmio + GEN3_IMBAR1XLMT_OFFSET);
        dev_dbg(&pdev->dev, "IMBAR1XLMT %#018llx\n", bar_addr);

        bar_addr = addr->bar4_addr64;
        iowrite64(bar_addr, mmio + GEN3_IMBAR2XLMT_OFFSET);
        bar_addr = ioread64(mmio + GEN3_IMBAR2XLMT_OFFSET);
        dev_dbg(&pdev->dev, "IMBAR2XLMT %#018llx\n", bar_addr);

        /* zero incoming translation addrs */
        iowrite64(0, mmio + GEN3_IMBAR1XBASE_OFFSET);
        iowrite64(0, mmio + GEN3_IMBAR2XBASE_OFFSET);

        ndev->peer_mmio = ndev->self_mmio;

        return 0;
}

static int gen3_init_ntb(struct intel_ntb_dev *ndev)
{
        int rc;


        ndev->mw_count = XEON_MW_COUNT;
        ndev->spad_count = GEN3_SPAD_COUNT;
        ndev->db_count = GEN3_DB_COUNT;
        ndev->db_link_mask = GEN3_DB_LINK_BIT;

        /* DB fixup for using 31 right now */
        if (ndev->hwerr_flags & NTB_HWERR_MSIX_VECTOR32_BAD)
                ndev->db_link_mask |= BIT_ULL(31);

        switch (ndev->ntb.topo) {
        case NTB_TOPO_B2B_USD:
        case NTB_TOPO_B2B_DSD:
                ndev->self_reg = &gen3_pri_reg;
                ndev->peer_reg = &gen3_b2b_reg;
                ndev->xlat_reg = &gen3_sec_xlat;

                if (ndev->ntb.topo == NTB_TOPO_B2B_USD) {
                        rc = gen3_setup_b2b_mw(ndev,
                                              &xeon_b2b_dsd_addr,
                                              &xeon_b2b_usd_addr);
                } else {
                        rc = gen3_setup_b2b_mw(ndev,
                                              &xeon_b2b_usd_addr,
                                              &xeon_b2b_dsd_addr);
                }

                if (rc)
                        return rc;

                /* Enable Bus Master and Memory Space on the secondary side */
                iowrite16(PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER,
                          ndev->self_mmio + GEN3_SPCICMD_OFFSET);

                break;

        default:
                return -EINVAL;
        }

        ndev->db_valid_mask = BIT_ULL(ndev->db_count) - 1;

        ndev->reg->db_iowrite(ndev->db_valid_mask,
                              ndev->self_mmio +
                              ndev->self_reg->db_mask);

        return 0;
}

int gen3_init_dev(struct intel_ntb_dev *ndev)
{
        struct pci_dev *pdev;
        u8 ppd;
        int rc;

        pdev = ndev->ntb.pdev;

        ndev->reg = &gen3_reg;

        rc = pci_read_config_byte(pdev, XEON_PPD_OFFSET, &ppd);
        if (rc)
                return -EIO;

        ndev->ntb.topo = xeon_ppd_topo(ndev, ppd);
        dev_dbg(&pdev->dev, "ppd %#x topo %s\n", ppd,
                ntb_topo_string(ndev->ntb.topo));
        if (ndev->ntb.topo == NTB_TOPO_NONE)
                return -EINVAL;

        ndev->hwerr_flags |= NTB_HWERR_MSIX_VECTOR32_BAD;

        rc = gen3_init_ntb(ndev);
        if (rc)
                return rc;

        return gen3_init_isr(ndev);
}

ssize_t ndev_ntb3_debugfs_read(struct file *filp, char __user *ubuf,
                                      size_t count, loff_t *offp)
{
        struct intel_ntb_dev *ndev;
        void __iomem *mmio;
        char *buf;
        size_t buf_size;
        ssize_t ret, off;
        union { u64 v64; u32 v32; u16 v16; } u;

        ndev = filp->private_data;
        mmio = ndev->self_mmio;

        buf_size = min(count, 0x800ul);

        buf = kmalloc(buf_size, GFP_KERNEL);
        if (!buf)
                return -ENOMEM;

        off = 0;

        off += scnprintf(buf + off, buf_size - off,
                         "NTB Device Information:\n");

        off += scnprintf(buf + off, buf_size - off,
                         "Connection Topology -\t%s\n",
                         ntb_topo_string(ndev->ntb.topo));

        off += scnprintf(buf + off, buf_size - off,
                         "NTB CTL -\t\t%#06x\n", ndev->ntb_ctl);
        off += scnprintf(buf + off, buf_size - off,
                         "LNK STA -\t\t%#06x\n", ndev->lnk_sta);

        if (!ndev->reg->link_is_up(ndev))
                off += scnprintf(buf + off, buf_size - off,
                                 "Link Status -\t\tDown\n");
        else {
                off += scnprintf(buf + off, buf_size - off,
                                 "Link Status -\t\tUp\n");
                off += scnprintf(buf + off, buf_size - off,
                                 "Link Speed -\t\tPCI-E Gen %u\n",
                                 NTB_LNK_STA_SPEED(ndev->lnk_sta));
                off += scnprintf(buf + off, buf_size - off,
                                 "Link Width -\t\tx%u\n",
                                 NTB_LNK_STA_WIDTH(ndev->lnk_sta));
        }

        off += scnprintf(buf + off, buf_size - off,
                         "Memory Window Count -\t%u\n", ndev->mw_count);
        off += scnprintf(buf + off, buf_size - off,
                         "Scratchpad Count -\t%u\n", ndev->spad_count);
        off += scnprintf(buf + off, buf_size - off,
                         "Doorbell Count -\t%u\n", ndev->db_count);
        off += scnprintf(buf + off, buf_size - off,
                         "Doorbell Vector Count -\t%u\n", ndev->db_vec_count);
        off += scnprintf(buf + off, buf_size - off,
                         "Doorbell Vector Shift -\t%u\n", ndev->db_vec_shift);

        off += scnprintf(buf + off, buf_size - off,
                         "Doorbell Valid Mask -\t%#llx\n", ndev->db_valid_mask);
        off += scnprintf(buf + off, buf_size - off,
                         "Doorbell Link Mask -\t%#llx\n", ndev->db_link_mask);
        off += scnprintf(buf + off, buf_size - off,
                         "Doorbell Mask Cached -\t%#llx\n", ndev->db_mask);

        u.v64 = ndev_db_read(ndev, mmio + ndev->self_reg->db_mask);
        off += scnprintf(buf + off, buf_size - off,
                         "Doorbell Mask -\t\t%#llx\n", u.v64);

        u.v64 = ndev_db_read(ndev, mmio + ndev->self_reg->db_bell);
        off += scnprintf(buf + off, buf_size - off,
                         "Doorbell Bell -\t\t%#llx\n", u.v64);

        off += scnprintf(buf + off, buf_size - off,
                         "\nNTB Incoming XLAT:\n");

        u.v64 = ioread64(mmio + GEN3_IMBAR1XBASE_OFFSET);
        off += scnprintf(buf + off, buf_size - off,
                         "IMBAR1XBASE -\t\t%#018llx\n", u.v64);

        u.v64 = ioread64(mmio + GEN3_IMBAR2XBASE_OFFSET);
        off += scnprintf(buf + off, buf_size - off,
                         "IMBAR2XBASE -\t\t%#018llx\n", u.v64);

        u.v64 = ioread64(mmio + GEN3_IMBAR1XLMT_OFFSET);
        off += scnprintf(buf + off, buf_size - off,
                         "IMBAR1XLMT -\t\t\t%#018llx\n", u.v64);

        u.v64 = ioread64(mmio + GEN3_IMBAR2XLMT_OFFSET);
        off += scnprintf(buf + off, buf_size - off,
                         "IMBAR2XLMT -\t\t\t%#018llx\n", u.v64);

        if (ntb_topo_is_b2b(ndev->ntb.topo)) {
                off += scnprintf(buf + off, buf_size - off,
                                 "\nNTB Outgoing B2B XLAT:\n");

                u.v64 = ioread64(mmio + GEN3_EMBAR1XBASE_OFFSET);
                off += scnprintf(buf + off, buf_size - off,
                                 "EMBAR1XBASE -\t\t%#018llx\n", u.v64);

                u.v64 = ioread64(mmio + GEN3_EMBAR2XBASE_OFFSET);
                off += scnprintf(buf + off, buf_size - off,
                                 "EMBAR2XBASE -\t\t%#018llx\n", u.v64);

                u.v64 = ioread64(mmio + GEN3_EMBAR1XLMT_OFFSET);
                off += scnprintf(buf + off, buf_size - off,
                                 "EMBAR1XLMT -\t\t%#018llx\n", u.v64);

                u.v64 = ioread64(mmio + GEN3_EMBAR2XLMT_OFFSET);
                off += scnprintf(buf + off, buf_size - off,
                                 "EMBAR2XLMT -\t\t%#018llx\n", u.v64);

                off += scnprintf(buf + off, buf_size - off,
                                 "\nNTB Secondary BAR:\n");

                u.v64 = ioread64(mmio + GEN3_EMBAR0_OFFSET);
                off += scnprintf(buf + off, buf_size - off,
                                 "EMBAR0 -\t\t%#018llx\n", u.v64);

                u.v64 = ioread64(mmio + GEN3_EMBAR1_OFFSET);
                off += scnprintf(buf + off, buf_size - off,
                                 "EMBAR1 -\t\t%#018llx\n", u.v64);

                u.v64 = ioread64(mmio + GEN3_EMBAR2_OFFSET);
                off += scnprintf(buf + off, buf_size - off,
                                 "EMBAR2 -\t\t%#018llx\n", u.v64);
        }

        off += scnprintf(buf + off, buf_size - off,
                         "\nNTB Statistics:\n");

        u.v16 = ioread16(mmio + GEN3_USMEMMISS_OFFSET);
        off += scnprintf(buf + off, buf_size - off,
                         "Upstream Memory Miss -\t%u\n", u.v16);

        off += scnprintf(buf + off, buf_size - off,
                         "\nNTB Hardware Errors:\n");

        if (!pci_read_config_word(ndev->ntb.pdev,
                                  GEN3_DEVSTS_OFFSET, &u.v16))
                off += scnprintf(buf + off, buf_size - off,
                                 "DEVSTS -\t\t%#06x\n", u.v16);

        if (!pci_read_config_word(ndev->ntb.pdev,
                                  GEN3_LINK_STATUS_OFFSET, &u.v16))
                off += scnprintf(buf + off, buf_size - off,
                                 "LNKSTS -\t\t%#06x\n", u.v16);

        if (!pci_read_config_dword(ndev->ntb.pdev,
                                   GEN3_UNCERRSTS_OFFSET, &u.v32))
                off += scnprintf(buf + off, buf_size - off,
                                 "UNCERRSTS -\t\t%#06x\n", u.v32);

        if (!pci_read_config_dword(ndev->ntb.pdev,
                                   GEN3_CORERRSTS_OFFSET, &u.v32))
                off += scnprintf(buf + off, buf_size - off,
                                 "CORERRSTS -\t\t%#06x\n", u.v32);

        ret = simple_read_from_buffer(ubuf, count, offp, buf, off);
        kfree(buf);
        return ret;
}

static int intel_ntb3_link_enable(struct ntb_dev *ntb,
                                  enum ntb_speed max_speed,
                                  enum ntb_width max_width)
{
        struct intel_ntb_dev *ndev;
        u32 ntb_ctl;

        ndev = container_of(ntb, struct intel_ntb_dev, ntb);

        dev_dbg(&ntb->pdev->dev,
                "Enabling link with max_speed %d max_width %d\n",
                max_speed, max_width);

        if (max_speed != NTB_SPEED_AUTO)
                dev_dbg(&ntb->pdev->dev, "ignoring max_speed %d\n", max_speed);
        if (max_width != NTB_WIDTH_AUTO)
                dev_dbg(&ntb->pdev->dev, "ignoring max_width %d\n", max_width);

        ntb_ctl = ioread32(ndev->self_mmio + ndev->reg->ntb_ctl);
        ntb_ctl &= ~(NTB_CTL_DISABLE | NTB_CTL_CFG_LOCK);
        ntb_ctl |= NTB_CTL_P2S_BAR2_SNOOP | NTB_CTL_S2P_BAR2_SNOOP;
        ntb_ctl |= NTB_CTL_P2S_BAR4_SNOOP | NTB_CTL_S2P_BAR4_SNOOP;
        iowrite32(ntb_ctl, ndev->self_mmio + ndev->reg->ntb_ctl);

        return 0;
}
static int intel_ntb3_mw_set_trans(struct ntb_dev *ntb, int pidx, int idx,
                                   dma_addr_t addr, resource_size_t size)
{
        struct intel_ntb_dev *ndev = ntb_ndev(ntb);
        unsigned long xlat_reg, limit_reg;
        resource_size_t bar_size, mw_size;
        void __iomem *mmio;
        u64 base, limit, reg_val;
        int bar;

        if (pidx != NTB_DEF_PEER_IDX)
                return -EINVAL;

        if (idx >= ndev->b2b_idx && !ndev->b2b_off)
                idx += 1;

        bar = ndev_mw_to_bar(ndev, idx);
        if (bar < 0)
                return bar;

        bar_size = pci_resource_len(ndev->ntb.pdev, bar);

        if (idx == ndev->b2b_idx)
                mw_size = bar_size - ndev->b2b_off;
        else
                mw_size = bar_size;

        /* hardware requires that addr is aligned to bar size */
        if (addr & (bar_size - 1))
                return -EINVAL;

        /* make sure the range fits in the usable mw size */
        if (size > mw_size)
                return -EINVAL;

        mmio = ndev->self_mmio;
        xlat_reg = ndev->xlat_reg->bar2_xlat + (idx * 0x10);
        limit_reg = ndev->xlat_reg->bar2_limit + (idx * 0x10);
        base = pci_resource_start(ndev->ntb.pdev, bar);

        /* Set the limit if supported, if size is not mw_size */
        if (limit_reg && size != mw_size)
                limit = base + size;
        else
                limit = base + mw_size;

        /* set and verify setting the translation address */
        iowrite64(addr, mmio + xlat_reg);
        reg_val = ioread64(mmio + xlat_reg);
        if (reg_val != addr) {
                iowrite64(0, mmio + xlat_reg);
                return -EIO;
        }

        dev_dbg(&ntb->pdev->dev, "BAR %d IMBARXBASE: %#Lx\n", bar, reg_val);

        /* set and verify setting the limit */
        iowrite64(limit, mmio + limit_reg);
        reg_val = ioread64(mmio + limit_reg);
        if (reg_val != limit) {
                iowrite64(base, mmio + limit_reg);
                iowrite64(0, mmio + xlat_reg);
                return -EIO;
        }

        dev_dbg(&ntb->pdev->dev, "BAR %d IMBARXLMT: %#Lx\n", bar, reg_val);

        /* setup the EP */
        limit_reg = ndev->xlat_reg->bar2_limit + (idx * 0x10) + 0x4000;
        base = ioread64(mmio + GEN3_EMBAR1_OFFSET + (8 * idx));
        base &= ~0xf;

        if (limit_reg && size != mw_size)
                limit = base + size;
        else
                limit = base + mw_size;

        /* set and verify setting the limit */
        iowrite64(limit, mmio + limit_reg);
        reg_val = ioread64(mmio + limit_reg);
        if (reg_val != limit) {
                iowrite64(base, mmio + limit_reg);
                iowrite64(0, mmio + xlat_reg);
                return -EIO;
        }

        dev_dbg(&ntb->pdev->dev, "BAR %d EMBARXLMT: %#Lx\n", bar, reg_val);

        return 0;
}

static int intel_ntb3_peer_db_addr(struct ntb_dev *ntb, phys_addr_t *db_addr,
                                   resource_size_t *db_size,
                                   u64 *db_data, int db_bit)
{
        phys_addr_t db_addr_base;
        struct intel_ntb_dev *ndev = ntb_ndev(ntb);

        if (unlikely(db_bit >= BITS_PER_LONG_LONG))
                return -EINVAL;

        if (unlikely(BIT_ULL(db_bit) & ~ntb_ndev(ntb)->db_valid_mask))
                return -EINVAL;

        ndev_db_addr(ndev, &db_addr_base, db_size, ndev->peer_addr,
                                ndev->peer_reg->db_bell);

        if (db_addr) {
                *db_addr = db_addr_base + (db_bit * 4);
                dev_dbg(&ndev->ntb.pdev->dev, "Peer db addr %llx db bit %d\n",
                                *db_addr, db_bit);
        }

        if (db_data) {
                *db_data = 1;
                dev_dbg(&ndev->ntb.pdev->dev, "Peer db data %llx db bit %d\n",
                                *db_data, db_bit);
        }

        return 0;
}

static int intel_ntb3_peer_db_set(struct ntb_dev *ntb, u64 db_bits)
{
        struct intel_ntb_dev *ndev = ntb_ndev(ntb);
        int bit;

        if (db_bits & ~ndev->db_valid_mask)
                return -EINVAL;

        while (db_bits) {
                bit = __ffs(db_bits);
                iowrite32(1, ndev->peer_mmio +
                                ndev->peer_reg->db_bell + (bit * 4));
                db_bits &= db_bits - 1;
        }

        return 0;
}

static u64 intel_ntb3_db_read(struct ntb_dev *ntb)
{
        struct intel_ntb_dev *ndev = ntb_ndev(ntb);

        return ndev_db_read(ndev,
                            ndev->self_mmio +
                            ndev->self_reg->db_clear);
}

static int intel_ntb3_db_clear(struct ntb_dev *ntb, u64 db_bits)
{
        struct intel_ntb_dev *ndev = ntb_ndev(ntb);

        return ndev_db_write(ndev, db_bits,
                             ndev->self_mmio +
                             ndev->self_reg->db_clear);
}

const struct ntb_dev_ops intel_ntb3_ops = {
        .mw_count               = intel_ntb_mw_count,
        .mw_get_align           = intel_ntb_mw_get_align,
        .mw_set_trans           = intel_ntb3_mw_set_trans,
        .peer_mw_count          = intel_ntb_peer_mw_count,
        .peer_mw_get_addr       = intel_ntb_peer_mw_get_addr,
        .link_is_up             = intel_ntb_link_is_up,
        .link_enable            = intel_ntb3_link_enable,
        .link_disable           = intel_ntb_link_disable,
        .db_valid_mask          = intel_ntb_db_valid_mask,
        .db_vector_count        = intel_ntb_db_vector_count,
        .db_vector_mask         = intel_ntb_db_vector_mask,
        .db_read                = intel_ntb3_db_read,
        .db_clear               = intel_ntb3_db_clear,
        .db_set_mask            = intel_ntb_db_set_mask,
        .db_clear_mask          = intel_ntb_db_clear_mask,
        .peer_db_addr           = intel_ntb3_peer_db_addr,
        .peer_db_set            = intel_ntb3_peer_db_set,
        .spad_is_unsafe         = intel_ntb_spad_is_unsafe,
        .spad_count             = intel_ntb_spad_count,
        .spad_read              = intel_ntb_spad_read,
        .spad_write             = intel_ntb_spad_write,
        .peer_spad_addr         = intel_ntb_peer_spad_addr,
        .peer_spad_read         = intel_ntb_peer_spad_read,
        .peer_spad_write        = intel_ntb_peer_spad_write,
};