Commit dcbf469a authored by Yuval Shaia's avatar Yuval Shaia Committed by Marcel Apfelbaum
Browse files

hw/rdma: Add wrappers and macros 



As all mapping for this device are from driver to device,
declare wrappers on top of pci_dma_*map functions.

In addition, declare macros to be used for debug messages.

Reviewed-by: default avatarDotan Barak <dotanb@mellanox.com>
Reviewed-by: default avatarZhu Yanjun <yanjun.zhu@oracle.com>
Signed-off-by: default avatarYuval Shaia <yuval.shaia@oracle.com>
Signed-off-by: default avatarMarcel Apfelbaum <marcel@redhat.com>
parent 7605e12a

hw/Makefile.objs

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@@ -18,6 +18,7 @@ devices-dirs-$(CONFIG_IPMI) += ipmi/ 
devices-dirs-$(CONFIG_SOFTMMU) += isa/

devices-dirs-$(CONFIG_SOFTMMU) += misc/

devices-dirs-$(CONFIG_SOFTMMU) += net/

devices-dirs-$(CONFIG_SOFTMMU) += rdma/

devices-dirs-$(CONFIG_SOFTMMU) += nvram/

devices-dirs-$(CONFIG_SOFTMMU) += pci/

devices-dirs-$(CONFIG_PCI) += pci-bridge/ pci-host/

hw/rdma/Makefile.objs

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ifeq ($(CONFIG_RDMA),y)

obj-$(CONFIG_PCI) += rdma_utils.o

endif

hw/rdma/rdma_utils.c

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+51 −0
Original line number Diff line number Diff line 
/*

 * QEMU paravirtual RDMA - Generic RDMA backend

 *

 * Copyright (C) 2018 Oracle

 * Copyright (C) 2018 Red Hat Inc

 *

 * Authors:

 *     Yuval Shaia <yuval.shaia@oracle.com>

 *     Marcel Apfelbaum <marcel@redhat.com>

 *

 * This work is licensed under the terms of the GNU GPL, version 2 or later.

 * See the COPYING file in the top-level directory.

 *

 */



#include "rdma_utils.h"



void *rdma_pci_dma_map(PCIDevice *dev, dma_addr_t addr, dma_addr_t plen)

{

    void *p;

    hwaddr len = plen;



    if (!addr) {

        pr_dbg("addr is NULL\n");

        return NULL;

    }



    p = pci_dma_map(dev, addr, &len, DMA_DIRECTION_TO_DEVICE);

    if (!p) {

        pr_dbg("Fail in pci_dma_map, addr=0x%llx, len=%ld\n",

               (long long unsigned int)addr, len);

        return NULL;

    }



    if (len != plen) {

        rdma_pci_dma_unmap(dev, p, len);

        return NULL;

    }



    pr_dbg("0x%llx -> %p (len=%ld)\n", (long long unsigned int)addr, p, len);



    return p;

}



void rdma_pci_dma_unmap(PCIDevice *dev, void *buffer, dma_addr_t len)

{

    pr_dbg("%p\n", buffer);

    if (buffer) {

        pci_dma_unmap(dev, buffer, len, DMA_DIRECTION_TO_DEVICE, 0);

    }

}

hw/rdma/rdma_utils.h

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Original line number Diff line number Diff line 
/*

 * RDMA device: Debug utilities

 *

 * Copyright (C) 2018 Oracle

 * Copyright (C) 2018 Red Hat Inc

 *

 *

 * Authors:

 *     Yuval Shaia <yuval.shaia@oracle.com>

 *     Marcel Apfelbaum <marcel@redhat.com>

 *

 * This work is licensed under the terms of the GNU GPL, version 2 or later.

 * See the COPYING file in the top-level directory.

 *

 */



#ifndef RDMA_UTILS_H

#define RDMA_UTILS_H



#include <qemu/osdep.h>

#include <include/hw/pci/pci.h>

#include <include/sysemu/dma.h>



#define pr_info(fmt, ...) \

    fprintf(stdout, "%s: %-20s (%3d): " fmt, "pvrdma",  __func__, __LINE__,\

           ## __VA_ARGS__)



#define pr_err(fmt, ...) \

    fprintf(stderr, "%s: Error at %-20s (%3d): " fmt, "pvrdma", __func__, \

        __LINE__, ## __VA_ARGS__)



#ifdef PVRDMA_DEBUG

#define pr_dbg(fmt, ...) \

    fprintf(stdout, "%s: %-20s (%3d): " fmt, "pvrdma", __func__, __LINE__,\

           ## __VA_ARGS__)

#else

#define pr_dbg(fmt, ...)

#endif



void *rdma_pci_dma_map(PCIDevice *dev, dma_addr_t addr, dma_addr_t plen);

void rdma_pci_dma_unmap(PCIDevice *dev, void *buffer, dma_addr_t len);



#endif