4f4321c11f
Zap data pointer from USBPacket, add a QEMUIOVector instead. Add a bunch of helper functions to manage USBPacket data. Switch over users to the new interface. Note that USBPacket->len was used for two purposes: First to pass in the buffer size and second to return the number of transfered bytes or the status code on async transfers. There is a new result variable for the latter. A new status code was added to catch uninitialized result. Nobody creates iovecs with more than one element (yet). Some users are (temporarely) limited to iovecs with a single element to keep the patch size as small as possible. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
64 lines
2 KiB
C
64 lines
2 KiB
C
/*
|
|
* 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 "cpu-common.h"
|
|
#include "usb.h"
|
|
#include "dma.h"
|
|
|
|
int usb_packet_map(USBPacket *p, QEMUSGList *sgl)
|
|
{
|
|
int is_write = (p->pid == USB_TOKEN_IN);
|
|
target_phys_addr_t len;
|
|
void *mem;
|
|
int i;
|
|
|
|
for (i = 0; i < sgl->nsg; i++) {
|
|
len = sgl->sg[i].len;
|
|
mem = cpu_physical_memory_map(sgl->sg[i].base, &len,
|
|
is_write);
|
|
if (!mem) {
|
|
goto err;
|
|
}
|
|
qemu_iovec_add(&p->iov, mem, len);
|
|
if (len != sgl->sg[i].len) {
|
|
goto err;
|
|
}
|
|
}
|
|
return 0;
|
|
|
|
err:
|
|
usb_packet_unmap(p);
|
|
return -1;
|
|
}
|
|
|
|
void usb_packet_unmap(USBPacket *p)
|
|
{
|
|
int is_write = (p->pid == USB_TOKEN_IN);
|
|
int i;
|
|
|
|
for (i = 0; i < p->iov.niov; i++) {
|
|
cpu_physical_memory_unmap(p->iov.iov[i].iov_base,
|
|
p->iov.iov[i].iov_len, is_write,
|
|
p->iov.iov[i].iov_len);
|
|
}
|
|
}
|