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Annotation of qemu/hw/usb/libhw.c, revision 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: }

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