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

[Ziqi Chen]

Hi  Powen,

The Bao. D . Nguyen (quic_nguyenb@xxxxxxxxxxx) 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