spapr_iommu: pass object ownership to parent/owner
[qemu/ar7.git] / hw / usb / libhw.c
blob73cdf0c97d0afa8eff820e5b1d9f5d0ae9201beb
1 /*
2 * QEMU USB emulation, libhw bits.
4 * Permission is hereby granted, free of charge, to any person obtaining a copy
5 * of this software and associated documentation files (the "Software"), to deal
6 * in the Software without restriction, including without limitation the rights
7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8 * copies of the Software, and to permit persons to whom the Software is
9 * furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
20 * THE SOFTWARE.
22 #include "qemu/osdep.h"
23 #include "qemu-common.h"
24 #include "hw/hw.h"
25 #include "hw/usb.h"
26 #include "sysemu/dma.h"
28 int usb_packet_map(USBPacket *p, QEMUSGList *sgl)
30 DMADirection dir = (p->pid == USB_TOKEN_IN) ?
31 DMA_DIRECTION_FROM_DEVICE : DMA_DIRECTION_TO_DEVICE;
32 void *mem;
33 int i;
35 for (i = 0; i < sgl->nsg; i++) {
36 dma_addr_t base = sgl->sg[i].base;
37 dma_addr_t len = sgl->sg[i].len;
39 while (len) {
40 dma_addr_t xlen = len;
41 mem = dma_memory_map(sgl->as, base, &xlen, dir);
42 if (!mem) {
43 goto err;
45 if (xlen > len) {
46 xlen = len;
48 qemu_iovec_add(&p->iov, mem, xlen);
49 len -= xlen;
50 base += xlen;
53 return 0;
55 err:
56 usb_packet_unmap(p, sgl);
57 return -1;
60 void usb_packet_unmap(USBPacket *p, QEMUSGList *sgl)
62 DMADirection dir = (p->pid == USB_TOKEN_IN) ?
63 DMA_DIRECTION_FROM_DEVICE : DMA_DIRECTION_TO_DEVICE;
64 int i;
66 for (i = 0; i < p->iov.niov; i++) {
67 dma_memory_unmap(sgl->as, p->iov.iov[i].iov_base,
68 p->iov.iov[i].iov_len, dir,
69 p->iov.iov[i].iov_len);