From: Asutosh Das <quic_asutoshd@quicinc.com>
To: Eddie Huang <eddie.huang@mediatek.com>
Cc: Can Guo <quic_cang@quicinc.com>, <quic_nitirawa@quicinc.com>,
<quic_rampraka@quicinc.com>, <quic_bhaskarv@quicinc.com>,
<quic_richardp@quicinc.com>, <linux-scsi@vger.kernel.org>,
<linux-arm-msm@vger.kernel.org>, <quic_nguyenb@quicinc.com>,
<quic_xiaosenh@quicinc.com>, <bvanassche@acm.org>,
<avri.altman@wdc.com>, <mani@kernel.org>, <beanhuo@micron.com>,
<stanley.chu@mediatek.com>, <liang-yen.wang@mediatek.com>
Subject: Re: Fwd: [PATCH v2 06/17] ufs: core: mcq: Configure resource regions
Date: Mon, 17 Oct 2022 18:47:54 -0700 [thread overview]
Message-ID: <20221018014754.GE10252@asutoshd-linux1.qualcomm.com> (raw)
In-Reply-To: <83fe64628b6d44f28637a6a8ba6b21eb0848caaa.camel@mediatek.com>
On Mon, Oct 17 2022 at 02:27 -0700, Eddie Huang wrote:
>Hi Can,
>
[...]
>Let me explain more detail about Mediatek UFS register assignment:
>a. 0x0 ~ 0x5FF: UFS common register
>b. 0x1600 ~ : MCQ register
>c. 0x2200: UFS common vendor specific register
>d. 0x2800: SQ/CQ head/tail pointer and interrupt status/enable register
> 0x2800 SQ0_head
> 0x2814 SQ0_IS
> 0x281C CQ0_head
> 0x2824 CQ0_IS
>
>The register location meet UFSHCI4.0 spec definition
>
>In legacy doorbell mode, need region a, c registers
>In MCQ mode, need region a, b, c, d registers
>
>As you can see, region b in the middle of region a and c. If I declare
>"mcq" in device tree, i.e.
>reg = <0, 0x11270000, 0, 0x2300>,
> <0, 0x11271600, 0, 0x1400>;
>reg-names = "ufs_mem", "mcq";
>
>Linux kernel boot fail due to register region overlapped and
>devm_ioremap_resource() return error.
>
>If I don't declare "mcq" region in device tree, Linux kernel still boot
>fail due to ufshcd_mcq_config_resource() call devm_ioreamap_resource()
>using calculated res_mcq which is overlapped with ufs_mem.
>
>We treat UFS as a single IP, so we suggest:
>1. Map whole UFS register (include MCQ) in ufshcd_pltfrm_init()
>2. In ufshcd_mcq_config_resource() assign mcq_base address directly,
>ie,
> hba->mcq_base = hba->mmio_base + MCQ_SQATTR_OFFSET(hba-
>>mcq_capabilities)
>3. In ufshcd_mcq_vops_op_runtime_config(), assign SQD, SQIS, CQD, CQIS
>base, offset and stride
>
>This is why I propose ufshcd_mcq_config_resource() to be customized,
>not in common code
How about we add a vops to ufshcd_mcq_config_resource().
SoC vendors should make sure that the vops populates the mcq_base.
>Regards,
>Eddie Huang
>
>
next prev parent reply other threads:[~2022-10-18 1:48 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-06 1:05 [PATCH v2 00/17] Add Multi Circular Queue Support Asutosh Das
2022-10-06 1:06 ` [PATCH v2 01/17] ufs: core: Probe for ext_iid support Asutosh Das
2022-10-06 1:06 ` [PATCH v2 02/17] ufs: core: Optimize duplicate code to read extended feature Asutosh Das
2022-10-06 1:06 ` [PATCH v2 03/17] ufs: core: Introduce Multi-circular queue capability Asutosh Das
2022-10-06 1:06 ` [PATCH v2 04/17] ufs: core: Defer adding host to scsi if mcq is supported Asutosh Das
2022-10-06 1:06 ` [PATCH v2 05/17] ufs: core: mcq: Introduce Multi Circular Queue Asutosh Das
2022-10-18 5:29 ` Eddie Huang
2022-10-18 16:00 ` Asutosh Das
2022-10-19 10:28 ` Eddie Huang
2022-10-06 1:06 ` [PATCH v2 06/17] ufs: core: mcq: Configure resource regions Asutosh Das
[not found] ` <5bd645ba24e1dc17343dd8d7b52fe6ea1eb6333d.camel@medaitek.com>
2022-10-14 9:31 ` Can Guo
[not found] ` <6592c7fe-0828-6bb3-17a8-9db53aac1873@quicinc.com>
2022-10-17 9:27 ` Fwd: " Eddie Huang
2022-10-18 1:47 ` Asutosh Das [this message]
2022-10-18 2:56 ` Eddie Huang
2022-10-19 19:50 ` Asutosh Das
2022-10-19 21:06 ` Bart Van Assche
2022-10-19 22:11 ` Asutosh Das
2022-10-20 1:13 ` Eddie Huang
2022-10-06 1:06 ` [PATCH v2 07/17] ufs: core: mcq: Calculate queue depth Asutosh Das
2022-10-06 1:06 ` [PATCH v2 08/17] ufs: core: mcq: Allocate memory for mcq mode Asutosh Das
[not found] ` <813a86729b42693d2ac0b6e29ab7867feef69e23.camel@medaitek.com>
2022-10-17 21:17 ` Asutosh Das
2022-10-06 1:06 ` [PATCH v2 09/17] ufs: core: mcq: Configure operation and runtime interface Asutosh Das
2022-10-06 1:06 ` [PATCH v2 10/17] ufs: core: mcq: Use shared tags for MCQ mode Asutosh Das
2022-10-06 1:06 ` [PATCH v2 11/17] ufs: core: Prepare ufshcd_send_command for mcq Asutosh Das
2022-10-06 1:06 ` [PATCH v2 12/17] ufs: core: mcq: Find hardware queue to queue request Asutosh Das
2022-10-06 1:06 ` [PATCH v2 13/17] ufs: core: Prepare for completion in mcq Asutosh Das
2022-10-06 1:06 ` [PATCH v2 14/17] ufs: mcq: Add completion support of a cqe Asutosh Das
2022-10-06 1:06 ` [PATCH v2 15/17] ufs: core: mcq: Add completion support in poll Asutosh Das
2022-10-06 1:06 ` [PATCH v2 16/17] ufs: core: mcq: Enable Multi Circular Queue Asutosh Das
2022-10-06 1:06 ` [PATCH v2 17/17] ufs: qcom-host: Enable multi circular queue capability Asutosh Das
[not found] ` <CGME20221006010736epcas2p20777225a537d4f2124e9a7264b2fffcf@epcms2p3>
2022-10-06 3:50 ` [PATCH v2 01/17] ufs: core: Probe for ext_iid support Daejun Park
2022-10-17 21:03 ` Asutosh Das
[not found] ` <CGME20221006010745epcas2p38b37890b7e1fefb45b8fbb0e14ab0a82@epcms2p7>
2022-10-07 2:41 ` [PATCH v2 06/17] ufs: core: mcq: Configure resource regions Daejun Park
2022-10-17 20:54 ` Asutosh Das
[not found] ` <CGME20221006010745epcas2p38b37890b7e1fefb45b8fbb0e14ab0a82@epcms2p8>
2022-10-07 3:44 ` Daejun Park
2022-10-17 21:03 ` (2) " Asutosh Das
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