You need implement tran_getcap() routine, and set SCSI_CAP_DMA_MAX
capability.
sample code is as below:
------%<------
xxx_attach() {
....
hba_tran->tran_getcap =xxx_scsi_getcap;
...
}
static int
xxx_tran_getcap(struct scsi_address *ap, char *cap, int tgtonly) {
switch (ckey) {
case SCSI_CAP_DMA_MAX:
rval = (int)xxx->dma_attr.dma_attr_maxxfer;
break;
default:
rval = UNDEFINED;
break;
}
------%<------
Javen
ram vegesna wrote:
>
> Hi,
>
> How can we tell the OS (scsi midlayer) to limit of I/O size
> that the device can handle?
> So, that OS will split any bigger size IO request into chunks of the
> specified size.
>
> Please, let me know if I have to change some parameter in
> ddi_dma_attr_t structure.
>
> Note : I am using Solaris 10 x86
>
> Thanks,
> Ram
>
>
> ------------------------------------------------------------------------
>
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