| 1058,15 → 1058,22 |
|---|
| ; this corresponds to 1001h bytes. If the requested size is |
| ; greater, we should split the transfer into several descriptors. |
| ; Boundaries to split must be multiples of endpoint transfer size |
| ; to avoid short packets except in the end of the transfer, |
| ; 1000h is always a good value. |
| ; to avoid short packets except in the end of the transfer. |
| cmp [size], 1001h |
| jbe .lastpacket |
| ; 2. While the remaining data cannot fit in one packet, |
| ; allocate page-sized descriptors. |
| mov edi, 1000h |
| ; allocate full-sized descriptors. |
| ; 2a. Calculate size of one descriptor: must be a multiple of transfer size |
| ; and must be not greater than 1001h. |
| movzx ecx, word [ebx+ohci_pipe.Flags+2-sizeof.ohci_pipe] |
| mov eax, 1001h |
| xor edx, edx |
| mov edi, eax |
| div ecx |
| sub edi, edx |
| ; 2b. Allocate in loop. |
| mov [packetSize], edi |
| .fullpackets: |
| cmp [size], edi |
| jbe .lastpacket |
| call ohci_alloc_packet |
| test eax, eax |
| jz .fail |
| 1073,7 → 1080,8 |
|---|
| mov [td], eax |
| add [buffer], edi |
| sub [size], edi |
| jmp .fullpackets |
| cmp [size], 1001h |
| ja .fullpackets |
| ; 3. The remaining data can fit in one descriptor; |
| ; allocate the last descriptor with size = size of remaining data. |
| .lastpacket: |