Return to libhw.c CVS log

Up to [Qemu by Fabrice Bellard] / qemu / hw / usb

Annotation of qemu/hw/usb/libhw.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  * QEMU USB emulation, libhw bits.
                      3:  *
                      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:
                     10:  *
                     11:  * The above copyright notice and this permission notice shall be included in
                     12:  * all copies or substantial portions of the Software.
                     13:  *
                     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.
                     21:  */
                     22: #include "qemu-common.h"
                     23: #include "cpu-common.h"
                     24: #include "hw/usb.h"
                     25: #include "dma.h"
                     26: 
                     27: int usb_packet_map(USBPacket *p, QEMUSGList *sgl)
                     28: {
                     29:     int is_write = (p->pid == USB_TOKEN_IN);
                     30:     target_phys_addr_t len;
                     31:     void *mem;
                     32:     int i;
                     33: 
                     34:     for (i = 0; i < sgl->nsg; i++) {
                     35:         len = sgl->sg[i].len;
                     36:         mem = cpu_physical_memory_map(sgl->sg[i].base, &len,
                     37:                                       is_write);
                     38:         if (!mem) {
                     39:             goto err;
                     40:         }
                     41:         qemu_iovec_add(&p->iov, mem, len);
                     42:         if (len != sgl->sg[i].len) {
                     43:             goto err;
                     44:         }
                     45:     }
                     46:     return 0;
                     47: 
                     48: err:
                     49:     usb_packet_unmap(p);
                     50:     return -1;
                     51: }
                     52: 
                     53: void usb_packet_unmap(USBPacket *p)
                     54: {
                     55:     int is_write = (p->pid == USB_TOKEN_IN);
                     56:     int i;
                     57: 
                     58:     for (i = 0; i < p->iov.niov; i++) {
                     59:         cpu_physical_memory_unmap(p->iov.iov[i].iov_base,
                     60:                                   p->iov.iov[i].iov_len, is_write,
                     61:                                   p->iov.iov[i].iov_len);
                     62:     }
                     63: }

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.