[PATCH v2 4/7] scsi: ufs: core: Add hwq print for debug

[Powen Kao (高伯文)]

Hi Bao,

Sure, we can first integrate ur patch and see if anything is missing
that need further upstream. Due to comapct schedule, I would kindly ask
if it will be ready by the end of this week? :) Thanks


On Mon, 2023-02-27 at 18:57 -0800, Bao D. Nguyen wrote:
> On 2/26/2023 7:14 Sure PM, Ziqi Chen wrote:
> > Hi Powen,
> > 
> > The Bao. D . Nguyen (quic_nguyenb at quicinc.com) from QCOM already
> > made 
> > patch to support MCQ abort.
> > 
> > ++ Bao here to be aware of it in case your error handing patch 
> > conflict with his abort handling patch.
> > 
> > 
> > Best Regards,
> > 
> > Ziqi
> > 
> > 
> > On 2/23/2023 10:13 PM, Powen Kao (高伯文) wrote:
> > > Hi Ziqi,
> > > 
> > > Thanks for ur comments.
> > > 
> > > This piece of code successfully dump relevent registers on our
> > > platform. As you know, mcq error handling flow is not ready yet
> > > so the
> > > insertion point might not seems to be reasonable.
> > > 
> > > Maybe drop this patch for now, I will send it later with error
> > > handling
> > > patches.
> > > 
> > > 
> > > On Thu, 2023-02-23 at 18:14 +0800, Ziqi Chen wrote:
> > > > Hi Po-Wen,
> > > > 
> > > > On 2/22/2023 11:04 AM, Po-Wen Kao wrote:
> > > > > +void ufshcd_mcq_print_hwqs(struct ufs_hba *hba, unsigned
> > > > > long
> > > > > bitmap)
> > > > > +{
> > > > > +    int id, i;
> > > > > +    char prefix[15];
> > > > > +
> > > > > +    if (!is_mcq_enabled(hba))
> > > > > +        return;
> > > > > +
> > > > > +    for_each_set_bit(id, &bitmap, hba->nr_hw_queues) {
> > > > > +        snprintf(prefix, sizeof(prefix), "q%d SQCFG: ", id);
> > > > > +        ufshcd_hex_dump(prefix,
> > > > > +            hba->mcq_base + MCQ_QCFG_SIZE * id,
> > > > > MCQ_QCFG_SQ_SIZE);
> > > > 
> > > > Is your purpose dump per hardware queue registers here?  If
> > > > yes, why
> > > > don't use ufsmcq_readl() to save to a buffer and then use
> > > > ufshcd_hex_dump()
> > > > 
> > > > to dump ? Are you sure ufshcd_hex_dump() can dump register
> > > > directly?
> > > > 
> > > > > +
> > > > > +        snprintf(prefix, sizeof(prefix), "q%d CQCFG: ", id);
> > > > > +        ufshcd_hex_dump(prefix,
> > > > > +            hba->mcq_base + MCQ_QCFG_SIZE * id +
> > > > > MCQ_QCFG_SQ_SIZE, MCQ_QCFG_CQ_SIZE);
> > > > 
> > > > Same to above comment.
> > > > > +
> > > > > +        for (i = 0; i < OPR_MAX ; i++) {
> > > > > +            snprintf(prefix, sizeof(prefix), "q%d OPR%d: ",
> > > > > id, i);
> > > > > +            ufshcd_hex_dump(prefix, mcq_opr_base(hba, i,
> > > > > id), mcq_opr_size[i]);
> > > > 
> > > > Same.
> > > > > +        }
> > > > > +    }
> > > > > +}
> > > > > +
> > > > > 
> > > > >    @@ -574,7 +569,16 @@ void ufshcd_print_trs(struct ufs_hba
> > > > > *hba,
> > > > > unsigned long bitmap, bool pr_prdt)
> > > > >            if (pr_prdt)
> > > > >                ufshcd_hex_dump("UPIU PRDT: ", lrbp-
> > > > > > ucd_prdt_ptr,
> > > > > 
> > > > >                    ufshcd_sg_entry_size(hba) *
> > > > > prdt_length);
> > > > > +
> > > > > +        if (is_mcq_enabled(hba)) {
> > > > > +            cmd = lrbp->cmd;
> > > > > +            if (!cmd)
> > > > > +                return;
> > > > > +            hwq = ufshcd_mcq_req_to_hwq(hba,
> > > > > scsi_cmd_to_rq(cmd));
> > > > > +            ufshcd_mcq_print_hwqs(hba, 1 << hwq->id);
> > > > 
> > > > Calling registers dump function in ufshcd_print_trs() is not
> > > > reasonable,
> > > > eg.. for each aborted request, it would print out all hwq
> > > > registers,
> > > > it's not make sense.
> > > > 
> > > > I think we should move it out of ufshcd_print_trs().
> > > > 
> > > > > +        }
> > > > >        }
> > > > > +
> > > > >    }
> > > > 
> > > > Best Regards,
> > > > 
> > > > Ziqi
> > > > 
> 
> Hi Powen,
> 
> I am going to push the mcq abort handling and mcq error handling
> code 
> upstream for review in a couple days. Would that work for you?
> 
> Regards,
> Bao
>