| /* |
| * 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 "hw/usb.h" |
| #include "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; |
| dma_addr_t len; |
| void *mem; |
| int i; |
| |
| for (i = 0; i < sgl->nsg; i++) { |
| len = sgl->sg[i].len; |
| mem = dma_memory_map(sgl->dma, sgl->sg[i].base, &len, dir); |
| 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, 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); |
| } |
| } |