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/*
* 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 "exec/cpu-common.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->dma, 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->dma, p->iov.iov[i].iov_base,
p->iov.iov[i].iov_len, dir,
p->iov.iov[i].iov_len);
}
}
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