From e44e3482bdb4d0ebde2d8b41830ac2cdb07948fb Mon Sep 17 00:00:00 2001 From: Yang Zhang Date: Fri, 28 Aug 2015 09:58:54 +0800 Subject: Add qemu 2.4.0 Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5 Signed-off-by: Yang Zhang --- qemu/hw/usb/libhw.c | 70 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 70 insertions(+) create mode 100644 qemu/hw/usb/libhw.c (limited to 'qemu/hw/usb/libhw.c') diff --git a/qemu/hw/usb/libhw.c b/qemu/hw/usb/libhw.c new file mode 100644 index 000000000..8df11c461 --- /dev/null +++ b/qemu/hw/usb/libhw.c @@ -0,0 +1,70 @@ +/* + * QEMU USB emulation, libhw bits. + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ +#include "qemu-common.h" +#include "hw/hw.h" +#include "hw/usb.h" +#include "sysemu/dma.h" + +int usb_packet_map(USBPacket *p, QEMUSGList *sgl) +{ + DMADirection dir = (p->pid == USB_TOKEN_IN) ? + DMA_DIRECTION_FROM_DEVICE : DMA_DIRECTION_TO_DEVICE; + void *mem; + int i; + + for (i = 0; i < sgl->nsg; i++) { + dma_addr_t base = sgl->sg[i].base; + dma_addr_t len = sgl->sg[i].len; + + while (len) { + dma_addr_t xlen = len; + mem = dma_memory_map(sgl->as, base, &xlen, dir); + if (!mem) { + goto err; + } + if (xlen > len) { + xlen = len; + } + qemu_iovec_add(&p->iov, mem, xlen); + len -= xlen; + base += xlen; + } + } + return 0; + +err: + usb_packet_unmap(p, sgl); + return -1; +} + +void usb_packet_unmap(USBPacket *p, QEMUSGList *sgl) +{ + DMADirection dir = (p->pid == USB_TOKEN_IN) ? + DMA_DIRECTION_FROM_DEVICE : DMA_DIRECTION_TO_DEVICE; + int i; + + for (i = 0; i < p->iov.niov; i++) { + dma_memory_unmap(sgl->as, p->iov.iov[i].iov_base, + p->iov.iov[i].iov_len, dir, + p->iov.iov[i].iov_len); + } +} -- cgit 1.2.3-korg