Il 15/09/2014 18:31, John Snow ha scritto:
>
>
> On 09/13/2014 03:50 PM, Paolo Bonzini wrote:
>> Il 13/09/2014 15:26, Paolo Bonzini ha scritto:
>
> +if (ad->dp_intr_req) {
> +ahci_trigger_irq(ad->hba, ad, PORT_IRQ_SG_DONE);
> +ad->dp_intr_req = 0;
> +}
On 09/13/2014 03:50 PM, Paolo Bonzini wrote:
Il 13/09/2014 15:26, Paolo Bonzini ha scritto:
+if (ad->dp_intr_req) {
+ahci_trigger_irq(ad->hba, ad, PORT_IRQ_SG_DONE);
+ad->dp_intr_req = 0;
+}
Is it also needed in the error case? Especially the short-PRDT case
that you
On 09/13/2014 09:26 AM, Paolo Bonzini wrote:
Il 13/09/2014 06:34, John Snow ha scritto:
AHCI devices support a feature where individual entries in the
scatter-gather list may have interrupt request bits set, in order
to receive notification partway through a command that a portion
of a transfe
Il 13/09/2014 15:26, Paolo Bonzini ha scritto:
>> >
>> > +if (ad->dp_intr_req) {
>> > +ahci_trigger_irq(ad->hba, ad, PORT_IRQ_SG_DONE);
>> > +ad->dp_intr_req = 0;
>> > +}
> Is it also needed in the error case? Especially the short-PRDT case
> that you are adding in the ne
Il 13/09/2014 06:34, John Snow ha scritto:
> AHCI devices support a feature where individual entries in the
> scatter-gather list may have interrupt request bits set, in order
> to receive notification partway through a command that a portion
> of a transfer has completed. AHCI specs refer to this
AHCI devices support a feature where individual entries in the
scatter-gather list may have interrupt request bits set, in order
to receive notification partway through a command that a portion
of a transfer has completed. AHCI specs refer to this as the
DPS bit or Descriptor Processed Status. It i
