On 21/06/2018 22:06, John Snow wrote: > > On 06/20/2018 09:25 AM, Paolo Bonzini wrote: >> + pio_fis_i = is_atapi ? ad->done_atapi_packet : !is_write; > Per DPIOO1, does this go to false for the first DRQ block, or did I > misunderstand? Currently my understanding:
DPIOO1 is the !is_atapi && is_write case, where I is currently always 0. When do we have more than one DRQ block, is it for multi-sector PIO reads? Then perhaps we need something like ad->command->done_first_pio. Paolo > - device->host > DPIOI1 > Interrupt bit shall be set. > - host->device: > DPIOO1: > 0 for first block, 1 otherwise > - ATAPI: > 0 for packet itself > 1 for all data otherwise.
