From dcbf469aeffb3b307d2bc5331797d67979b715e3 Mon Sep 17 00:00:00 2001 From: Yuval Shaia Date: Fri, 9 Feb 2018 15:15:00 +0200 Subject: 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: Dotan Barak Reviewed-by: Zhu Yanjun Signed-off-by: Yuval Shaia Signed-off-by: Marcel Apfelbaum --- hw/rdma/rdma_utils.c | 51 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 51 insertions(+) create mode 100644 hw/rdma/rdma_utils.c (limited to 'hw/rdma/rdma_utils.c') diff --git a/hw/rdma/rdma_utils.c b/hw/rdma/rdma_utils.c new file mode 100644 index 0000000000..0e5caffd40 --- /dev/null +++ b/hw/rdma/rdma_utils.c @@ -0,0 +1,51 @@ +/* + * QEMU paravirtual RDMA - Generic RDMA backend + * + * Copyright (C) 2018 Oracle + * Copyright (C) 2018 Red Hat Inc + * + * Authors: + * Yuval Shaia + * Marcel Apfelbaum + * + * 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); + } +} -- cgit v1.2.3