On Jun 27 13:17, Keith Busch wrote:
> On Thu, Jun 16, 2022 at 08:34:07PM +0800, Jinhao Fan wrote:
> > }
> > sq->timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, nvme_process_sq, sq);
> >
> > + if (n->dbbuf_enabled) {
> > + sq->db_addr = n->dbbuf_dbs + (sqid << 3);
> > + sq->ei_addr = n->dbbuf_eis + (sqid << 3);
> > + }
> > +
> > assert(n->cq[cqid]);
> > cq = n->cq[cqid];
> > QTAILQ_INSERT_TAIL(&(cq->sq_list), sq, entry);
> > @@ -4615,6 +4631,10 @@ static void nvme_init_cq(NvmeCQueue *cq, NvmeCtrl
> > *n, uint64_t dma_addr,
> > cq->head = cq->tail = 0;
> > QTAILQ_INIT(&cq->req_list);
> > QTAILQ_INIT(&cq->sq_list);
> > + if (n->dbbuf_enabled) {
> > + cq->db_addr = n->dbbuf_dbs + (cqid << 3) + (1 << 2);
> > + cq->ei_addr = n->dbbuf_eis + (cqid << 3) + (1 << 2);
> > + }
> > n->cq[cqid] = cq;
> > cq->timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, nvme_post_cqes, cq);
> > }
>
> I just notice these address calculations changed from previous versions. What
> happened to taking the doorbell stride into account? Spec says the shadows and
> events follow the same stride spacing as the registers.The stride is fixed at zero.
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