projects / mirror_qemu.git / blame
| Commit | Line | Data |
|---|---|---|
| dcbf469a YS |
1 | /* |
| 2 | * QEMU paravirtual RDMA - Generic RDMA backend | |
| 3 | * | |
| 4 | * Copyright (C) 2018 Oracle | |
| 5 | * Copyright (C) 2018 Red Hat Inc | |
| 6 | * | |
| 7 | * Authors: | |
| 8 | * Yuval Shaia <yuval.shaia@oracle.com> | |
| 9 | * Marcel Apfelbaum <marcel@redhat.com> | |
| 10 | * | |
| 11 | * This work is licensed under the terms of the GNU GPL, version 2 or later. | |
| 12 | * See the COPYING file in the top-level directory. | |
| 13 | * | |
| 14 | */ | |
| 15 | ||
| b7d89466 | 16 | #include "qemu/osdep.h" |
| dcbf469a YS |
17 | #include "rdma_utils.h" |
| 18 | ||
| ef846e02 YS |
19 | #ifdef PVRDMA_DEBUG |
| 20 | unsigned long pr_dbg_cnt; | |
| 21 | #endif | |
| 22 | ||
| dcbf469a YS |
23 | void *rdma_pci_dma_map(PCIDevice *dev, dma_addr_t addr, dma_addr_t plen) |
| 24 | { | |
| 25 | void *p; | |
| 26 | hwaddr len = plen; | |
| 27 | ||
| 28 | if (!addr) { | |
| 29 | pr_dbg("addr is NULL\n"); | |
| 30 | return NULL; | |
| 31 | } | |
| 32 | ||
| 33 | p = pci_dma_map(dev, addr, &len, DMA_DIRECTION_TO_DEVICE); | |
| 34 | if (!p) { | |
| 6f559013 YS |
35 | pr_dbg("Fail in pci_dma_map, addr=0x%" PRIx64 ", len=%" PRId64 "\n", |
| 36 | addr, len); | |
| dcbf469a YS |
37 | return NULL; |
| 38 | } | |
| 39 | ||
| 40 | if (len != plen) { | |
| 41 | rdma_pci_dma_unmap(dev, p, len); | |
| 42 | return NULL; | |
| 43 | } | |
| 44 | ||
| 6f559013 | 45 | pr_dbg("0x%" PRIx64 " -> %p (len=% " PRId64 ")\n", addr, p, len); |
| dcbf469a YS |
46 | |
| 47 | return p; | |
| 48 | } | |
| 49 | ||
| 50 | void rdma_pci_dma_unmap(PCIDevice *dev, void *buffer, dma_addr_t len) | |
| 51 | { | |
| 52 | pr_dbg("%p\n", buffer); | |
| 53 | if (buffer) { | |
| 54 | pci_dma_unmap(dev, buffer, len, DMA_DIRECTION_TO_DEVICE, 0); | |
| 55 | } | |
| 56 | } |