From: Can Guo <quic_cang@quicinc.com>
To: Avri Altman <Avri.Altman@wdc.com>,
"bvanassche@acm.org" <bvanassche@acm.org>,
"stanley.chu@mediatek.com" <stanley.chu@mediatek.com>,
"adrian.hunter@intel.com" <adrian.hunter@intel.com>,
"alim.akhtar@samsung.com" <alim.akhtar@samsung.com>,
"beanhuo@micron.com" <beanhuo@micron.com>,
"quic_asutoshd@quicinc.com" <quic_asutoshd@quicinc.com>,
"quic_nguyenb@quicinc.com" <quic_nguyenb@quicinc.com>,
"quic_ziqichen@quicinc.com" <quic_ziqichen@quicinc.com>,
"linux-scsi@vger.kernel.org" <linux-scsi@vger.kernel.org>,
"kernel-team@android.com" <kernel-team@android.com>
Cc: "James E.J. Bottomley" <jejb@linux.ibm.com>,
"Martin K. Petersen" <martin.petersen@oracle.com>,
Daejun Park <daejun7.park@samsung.com>,
Jinyoung Choi <j-young.choi@samsung.com>,
Kiwoong Kim <kwmad.kim@samsung.com>,
open list <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 1/2] scsi: ufs: Add Multi-Circular Queue support
Date: Tue, 26 Jul 2022 10:55:50 +0800 [thread overview]
Message-ID: <2975315f-f59b-0787-a662-e50766aaf470@quicinc.com> (raw)
In-Reply-To: <DM6PR04MB6575048E121B56FDA56DA27DFC939@DM6PR04MB6575.namprd04.prod.outlook.com>
Hi Avri,
On 7/23/2022 10:59 PM, Avri Altman wrote:
>> +#define MCQ_ROP_OFFSET_n(p, i) \
>> + hba->mcq_rop[(p)].offset + hba->mcq_rop[(p)].stride * (i)
> Can you please explain the 0x100 stride thing?
> Theoretically, each rop set is 48Bytes long, or did I get it wrong?
In the draft, there are 4 sets of MCQ Operation & Runtime Registers,
i.e. SQD_n, SQIS_n, CQD_n and CQIS_n.
They may be interleaved or segregated, depends on realistic HW designs.
For example, either #1 or #2 can be the case, and QCOM uses case #1, in
which 'stride' means the size (in bytes)
that one register has to hop over to reach the same register on next
round (for example, addr of SQHP_n == (addr of SQHP_0) + (stride * n)).
To allow flexibility, SoC vendors, depends on realistic HW designs, (by
using vops_config_mcq_rop) can manipulate
the 'offset' and 'stride' of each MCQ Operation & Runtime Register such
that SQDAO_n, SQISAO_n, CQDAO_n and
CQISAO_n are programmed with wanted offsets/values.
#1 -
SQHP_0
SQTP_0
SQRTC_0
SQCTI_0
SQRTS_0
SQIS_0
SQIE_0
CQHP_0
CQTP_0
CQIS_0
CQIE_0
CQIACR_0
SQHP_1
SQTP_1
SQRTC_1
SQCTI_1
SQRTS_1
SQIS_1
SQIE_1
CQHP_1
CQTP_1
CQIS_1
CQIE_1
CQIACR_1
...
SQHP_n
SQTP_n
SQRTC_n
SQCTI_n
SQRTS_n
SQIS_n
SQIE_n
CQHP_n
CQTP_n
CQIS_n
CQIE_n
CQIACR_n
#2 -
SQHP_0
SQTP_0
SQRTC_0
SQCTI_0
SQRTS_0
SQHP_1
SQTP_1
SQRTC_1
SQCTI_1
SQRTS_1
...
SQHP_n
SQTP_n
SQRTC_n
SQCTI_n
SQRTS_n
SQIS_0
SQIE_0
SQIS_1
SQIE_1
...
SQIS_n
SQIE_n
CQHP_0
CQTP_0
CQHP_1
CQTP_1
...
CQHP_n
CQTP_n
CQIS_0
CQIE_0
CQIACR_0
CQIS_1
CQIE_1
CQIACR_1
...
CQIS_n
CQIE_n
CQIACR_n
Thanks,
Can Guo.
> Thanks,
> Avri
next prev parent reply other threads:[~2022-07-26 2:56 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1658214120-22772-1-git-send-email-quic_cang@quicinc.com>
2022-07-19 7:01 ` [PATCH 1/2] scsi: ufs: Add Multi-Circular Queue support Can Guo
2022-07-19 23:01 ` Bart Van Assche
2022-07-19 23:07 ` Bart Van Assche
2022-07-20 17:34 ` Asutosh Das (asd)
2022-07-20 7:57 ` kernel test robot
2022-07-20 11:41 ` kernel test robot
2022-07-20 16:36 ` kernel test robot
2022-07-22 7:31 ` Avri Altman
2022-07-22 17:35 ` Asutosh Das (asd)
2022-07-22 19:37 ` Avri Altman
2022-07-22 20:14 ` Asutosh Das (asd)
2022-07-22 20:22 ` Avri Altman
2022-07-22 21:05 ` Asutosh Das (asd)
2022-07-22 17:58 ` Bart Van Assche
2022-07-26 6:48 ` Can Guo
2022-07-22 14:42 ` Avri Altman
2022-07-23 14:59 ` Avri Altman
2022-07-26 2:55 ` Can Guo [this message]
2022-07-23 15:26 ` Avri Altman
2022-07-24 3:14 ` Bart Van Assche
2022-07-25 16:24 ` Asutosh Das (asd)
2022-07-23 20:22 ` Avri Altman
2022-07-25 16:26 ` Asutosh Das (asd)
2022-07-25 19:50 ` Avri Altman
2022-07-25 20:24 ` Asutosh Das (asd)
2022-07-23 21:23 ` Avri Altman
2022-07-24 3:15 ` Bart Van Assche
2022-07-25 16:35 ` Asutosh Das (asd)
2022-07-26 22:47 ` Bart Van Assche
2022-07-24 4:07 ` Avri Altman
2022-07-25 16:38 ` Asutosh Das (asd)
2022-07-26 6:35 ` Can Guo
2022-07-26 9:46 ` Avri Altman
2022-07-24 4:32 ` Avri Altman
2022-07-26 6:21 ` Can Guo
2022-07-24 7:21 ` Avri Altman
2022-07-24 21:54 ` Bean Huo
2022-07-25 17:35 ` Asutosh Das (asd)
2022-07-25 9:16 ` Dan Carpenter
2022-07-28 19:10 ` John Garry
2022-07-28 19:15 ` Asutosh Das (asd)
2022-07-28 20:29 ` Bart Van Assche
2022-07-28 21:07 ` Asutosh Das (asd)
2022-07-29 16:43 ` Asutosh Das (asd)
2022-07-29 18:59 ` Bart Van Assche
2022-07-28 19:38 ` Bart Van Assche
2022-07-28 20:00 ` Asutosh Das (asd)
2022-07-19 7:01 ` [PATCH 2/2] scsi: ufs-qcom: Implement three CMQ related vops Can Guo
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