root / hw / usb / libhw.c @ b43a2851
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1 | 4f4321c1 | Gerd Hoffmann | /*
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2 | 4f4321c1 | Gerd Hoffmann | * QEMU USB emulation, libhw bits.
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3 | 4f4321c1 | Gerd Hoffmann | *
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4 | 4f4321c1 | Gerd Hoffmann | * Permission is hereby granted, free of charge, to any person obtaining a copy
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5 | 4f4321c1 | Gerd Hoffmann | * of this software and associated documentation files (the "Software"), to deal
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6 | 4f4321c1 | Gerd Hoffmann | * in the Software without restriction, including without limitation the rights
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7 | 4f4321c1 | Gerd Hoffmann | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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8 | 4f4321c1 | Gerd Hoffmann | * copies of the Software, and to permit persons to whom the Software is
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9 | 4f4321c1 | Gerd Hoffmann | * furnished to do so, subject to the following conditions:
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10 | 4f4321c1 | Gerd Hoffmann | *
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11 | 4f4321c1 | Gerd Hoffmann | * The above copyright notice and this permission notice shall be included in
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12 | 4f4321c1 | Gerd Hoffmann | * all copies or substantial portions of the Software.
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13 | 4f4321c1 | Gerd Hoffmann | *
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14 | 4f4321c1 | Gerd Hoffmann | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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15 | 4f4321c1 | Gerd Hoffmann | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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16 | 4f4321c1 | Gerd Hoffmann | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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17 | 4f4321c1 | Gerd Hoffmann | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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18 | 4f4321c1 | Gerd Hoffmann | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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19 | 4f4321c1 | Gerd Hoffmann | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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20 | 4f4321c1 | Gerd Hoffmann | * THE SOFTWARE.
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21 | 4f4321c1 | Gerd Hoffmann | */
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22 | 4f4321c1 | Gerd Hoffmann | #include "qemu-common.h" |
23 | 4f4321c1 | Gerd Hoffmann | #include "cpu-common.h" |
24 | f1ae32a1 | Gerd Hoffmann | #include "hw/usb.h" |
25 | 4f4321c1 | Gerd Hoffmann | #include "dma.h" |
26 | 4f4321c1 | Gerd Hoffmann | |
27 | 4f4321c1 | Gerd Hoffmann | int usb_packet_map(USBPacket *p, QEMUSGList *sgl)
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28 | 4f4321c1 | Gerd Hoffmann | { |
29 | e2f89926 | David Gibson | DMADirection dir = (p->pid == USB_TOKEN_IN) ? |
30 | e2f89926 | David Gibson | DMA_DIRECTION_FROM_DEVICE : DMA_DIRECTION_TO_DEVICE; |
31 | e2f89926 | David Gibson | dma_addr_t len; |
32 | 4f4321c1 | Gerd Hoffmann | void *mem;
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33 | 4f4321c1 | Gerd Hoffmann | int i;
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34 | 4f4321c1 | Gerd Hoffmann | |
35 | 4f4321c1 | Gerd Hoffmann | for (i = 0; i < sgl->nsg; i++) { |
36 | 4f4321c1 | Gerd Hoffmann | len = sgl->sg[i].len; |
37 | e2f89926 | David Gibson | mem = dma_memory_map(sgl->dma, sgl->sg[i].base, &len, dir); |
38 | 4f4321c1 | Gerd Hoffmann | if (!mem) {
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39 | 4f4321c1 | Gerd Hoffmann | goto err;
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40 | 4f4321c1 | Gerd Hoffmann | } |
41 | 4f4321c1 | Gerd Hoffmann | qemu_iovec_add(&p->iov, mem, len); |
42 | 4f4321c1 | Gerd Hoffmann | if (len != sgl->sg[i].len) {
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43 | 4f4321c1 | Gerd Hoffmann | goto err;
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44 | 4f4321c1 | Gerd Hoffmann | } |
45 | 4f4321c1 | Gerd Hoffmann | } |
46 | 4f4321c1 | Gerd Hoffmann | return 0; |
47 | 4f4321c1 | Gerd Hoffmann | |
48 | 4f4321c1 | Gerd Hoffmann | err:
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49 | e2f89926 | David Gibson | usb_packet_unmap(p, sgl); |
50 | 4f4321c1 | Gerd Hoffmann | return -1; |
51 | 4f4321c1 | Gerd Hoffmann | } |
52 | 4f4321c1 | Gerd Hoffmann | |
53 | e2f89926 | David Gibson | void usb_packet_unmap(USBPacket *p, QEMUSGList *sgl)
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54 | 4f4321c1 | Gerd Hoffmann | { |
55 | e2f89926 | David Gibson | DMADirection dir = (p->pid == USB_TOKEN_IN) ? |
56 | e2f89926 | David Gibson | DMA_DIRECTION_FROM_DEVICE : DMA_DIRECTION_TO_DEVICE; |
57 | 4f4321c1 | Gerd Hoffmann | int i;
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58 | 4f4321c1 | Gerd Hoffmann | |
59 | 4f4321c1 | Gerd Hoffmann | for (i = 0; i < p->iov.niov; i++) { |
60 | e2f89926 | David Gibson | dma_memory_unmap(sgl->dma, p->iov.iov[i].iov_base, |
61 | e2f89926 | David Gibson | p->iov.iov[i].iov_len, dir, |
62 | e2f89926 | David Gibson | p->iov.iov[i].iov_len); |
63 | 4f4321c1 | Gerd Hoffmann | } |
64 | 4f4321c1 | Gerd Hoffmann | } |