linux-kernel - Re: [PATCH 2/2] scsi: ufs: qcom: Add support for scaling interconnects

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Date:   Wed, 2 Aug 2023 09:33:53 +0530
From:   Manivannan Sadhasivam <mani@...nel.org>
To:     Bart Van Assche <bvanassche@....org>
Cc:     Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
        andersson@...nel.org, konrad.dybcio@...aro.org, jejb@...ux.ibm.com,
        martin.petersen@...cle.com, linux-arm-msm@...r.kernel.org,
        linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
        Brian Masney <bmasney@...hat.com>
Subject: Re: [PATCH 2/2] scsi: ufs: qcom: Add support for scaling
 interconnects

On Mon, Jul 31, 2023 at 01:09:52PM -0700, Bart Van Assche wrote:
> On 7/31/23 07:50, Manivannan Sadhasivam wrote:
> > +struct __ufs_qcom_bw_table {
> > +	u32 mem_bw;
> > +	u32 cfg_bw;
> > +} ufs_qcom_bw_table[MODE_MAX + 1][QCOM_UFS_MAX_GEAR + 1][QCOM_UFS_MAX_LANE + 1] = {
> > +	[MODE_MIN][0][0]		   = { 0,		0 }, /* Bandwidth values in KB/s */
> > +	[MODE_PWM][UFS_PWM_G1][UFS_LANE_1] = { 922,		1000 },
> > +	[MODE_PWM][UFS_PWM_G2][UFS_LANE_1] = { 1844,		1000 },
> > +	[MODE_PWM][UFS_PWM_G3][UFS_LANE_1] = { 3688,		1000 },
> > +	[MODE_PWM][UFS_PWM_G4][UFS_LANE_1] = { 7376,		1000 },
> > +	[MODE_PWM][UFS_PWM_G1][UFS_LANE_2] = { 1844,		1000 },
> > +	[MODE_PWM][UFS_PWM_G2][UFS_LANE_2] = { 3688,		1000 },
> > +	[MODE_PWM][UFS_PWM_G3][UFS_LANE_2] = { 7376,		1000 },
> > +	[MODE_PWM][UFS_PWM_G4][UFS_LANE_2] = { 14752,		1000 },
> > +	[MODE_HS_RA][UFS_HS_G1][UFS_LANE_1] = { 127796,		1000 },
> > +	[MODE_HS_RA][UFS_HS_G2][UFS_LANE_1] = { 255591,		1000 },
> > +	[MODE_HS_RA][UFS_HS_G3][UFS_LANE_1] = { 1492582,	102400 },
> > +	[MODE_HS_RA][UFS_HS_G4][UFS_LANE_1] = { 2915200,	204800 },
> > +	[MODE_HS_RA][UFS_HS_G1][UFS_LANE_2] = { 255591,		1000 },
> > +	[MODE_HS_RA][UFS_HS_G2][UFS_LANE_2] = { 511181,		1000 },
> > +	[MODE_HS_RA][UFS_HS_G3][UFS_LANE_2] = { 1492582,	204800 },
> > +	[MODE_HS_RA][UFS_HS_G4][UFS_LANE_2] = { 2915200,	409600 },
> > +	[MODE_HS_RB][UFS_HS_G1][UFS_LANE_1] = { 149422,		1000 },
> > +	[MODE_HS_RB][UFS_HS_G2][UFS_LANE_1] = { 298189,		1000 },
> > +	[MODE_HS_RB][UFS_HS_G3][UFS_LANE_1] = { 1492582,	102400 },
> > +	[MODE_HS_RB][UFS_HS_G4][UFS_LANE_1] = { 2915200,	204800 },
> > +	[MODE_HS_RB][UFS_HS_G1][UFS_LANE_2] = { 298189,		1000 },
> > +	[MODE_HS_RB][UFS_HS_G2][UFS_LANE_2] = { 596378,		1000 },
> > +	[MODE_HS_RB][UFS_HS_G3][UFS_LANE_2] = { 1492582,	204800 },
> > +	[MODE_HS_RB][UFS_HS_G4][UFS_LANE_2] = { 2915200,	409600 },
> > +	[MODE_MAX][0][0]		    = { 7643136,	307200 },
> > +};
> 
> Why has the above data structure not been declared as 'static const'?
> 

Missed that! Sent a patch now. Thanks for spotting.

- Mani

> Thanks,
> 
> Bart.

-- 
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