linux-kernel - Re: [PATCH v2] scsi: ufs: core: Do not open code SZ

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Date:   Tue, 30 May 2023 22:46:41 -0700
From:   "Bao D. Nguyen" <quic_nguyenb@...cinc.com>
To:     Avri Altman <avri.altman@....com>,
        "James E . J . Bottomley" <jejb@...ux.vnet.ibm.com>,
        "Martin K . Petersen" <martin.petersen@...cle.com>
CC:     <linux-scsi@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Keoseong Park <keosung.park@...sung.com>,
        Bean Huo <beanhuo@...ron.com>,
        Stanley Chu <stanley.chu@...iatek.com>
Subject: Re: [PATCH v2] scsi: ufs: core: Do not open code SZ_x

On 5/30/2023 10:17 PM, Avri Altman wrote:
> v1 -> v2: Attend UTMRD as well
> 
> A tad cleanup - No functional change.
While you are at it, how about
blk_queue_update_dma_alignment(q, 4096 - 1) in ufshcd_slave_configure()

and drivers/ufs/core/ufshpb.c
pool_size = PAGE_ALIGN(ufshpb_host_map_kbytes * 1024) / PAGE_SIZE;

Thanks,
Bao
> 
> Signed-off-by: Avri Altman <avri.altman@....com>
> Reviewed-by: Bean Huo <beanhuo@...ron.com>
> Reviewed-by: Stanley Chu <stanley.chu@...iatek.com>
> ---
>   drivers/ufs/core/ufshcd.c | 10 +++++-----
>   include/ufs/ufshci.h      |  2 +-
>   2 files changed, 6 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c
> index fdf5073c7c6c..10a10f8f0bd1 100644
> --- a/drivers/ufs/core/ufshcd.c
> +++ b/drivers/ufs/core/ufshcd.c
> @@ -2519,7 +2519,7 @@ static void ufshcd_sgl_to_prdt(struct ufs_hba *hba, struct ufshcd_lrb *lrbp, int
>   			 * 11b to indicate Dword granularity. A value of '3'
>   			 * indicates 4 bytes, '7' indicates 8 bytes, etc."
>   			 */
> -			WARN_ONCE(len > 256 * 1024, "len = %#x\n", len);
> +			WARN_ONCE(len > SZ_256K, "len = %#x\n", len);
>   			prd->size = cpu_to_le32(len - 1);
>   			prd->addr = cpu_to_le64(sg->dma_address);
>   			prd->reserved = 0;
> @@ -3765,7 +3765,7 @@ static int ufshcd_memory_alloc(struct ufs_hba *hba)
>   
>   	/*
>   	 * Allocate memory for UTP Transfer descriptors
> -	 * UFSHCI requires 1024 byte alignment of UTRD
> +	 * UFSHCI requires 1KB alignment of UTRD
>   	 */
>   	utrdl_size = (sizeof(struct utp_transfer_req_desc) * hba->nutrs);
>   	hba->utrdl_base_addr = dmam_alloc_coherent(hba->dev,
> @@ -3773,7 +3773,7 @@ static int ufshcd_memory_alloc(struct ufs_hba *hba)
>   						   &hba->utrdl_dma_addr,
>   						   GFP_KERNEL);
>   	if (!hba->utrdl_base_addr ||
> -	    WARN_ON(hba->utrdl_dma_addr & (1024 - 1))) {
> +	    WARN_ON(hba->utrdl_dma_addr & (SZ_1K - 1))) {
>   		dev_err(hba->dev,
>   			"Transfer Descriptor Memory allocation failed\n");
>   		goto out;
> @@ -3797,7 +3797,7 @@ static int ufshcd_memory_alloc(struct ufs_hba *hba)
>   						    &hba->utmrdl_dma_addr,
>   						    GFP_KERNEL);
>   	if (!hba->utmrdl_base_addr ||
> -	    WARN_ON(hba->utmrdl_dma_addr & (1024 - 1))) {
> +	    WARN_ON(hba->utmrdl_dma_addr & (SZ_1K - 1))) {
>   		dev_err(hba->dev,
>   		"Task Management Descriptor Memory allocation failed\n");
>   		goto out;
> @@ -8760,7 +8760,7 @@ static const struct scsi_host_template ufshcd_driver_template = {
>   	.cmd_per_lun		= UFSHCD_CMD_PER_LUN,
>   	.can_queue		= UFSHCD_CAN_QUEUE,
>   	.max_segment_size	= PRDT_DATA_BYTE_COUNT_MAX,
> -	.max_sectors		= (1 << 20) / SECTOR_SIZE, /* 1 MiB */
> +	.max_sectors		= SZ_1M / SECTOR_SIZE,
>   	.max_host_blocked	= 1,
>   	.track_queue_depth	= 1,
>   	.skip_settle_delay	= 1,
> diff --git a/include/ufs/ufshci.h b/include/ufs/ufshci.h
> index 11424bb03814..db2d5db5c88e 100644
> --- a/include/ufs/ufshci.h
> +++ b/include/ufs/ufshci.h
> @@ -453,7 +453,7 @@ enum {
>   };
>   
>   /* The maximum length of the data byte count field in the PRDT is 256KB */
> -#define PRDT_DATA_BYTE_COUNT_MAX	(256 * 1024)
> +#define PRDT_DATA_BYTE_COUNT_MAX	SZ_256K
>   /* The granularity of the data byte count field in the PRDT is 32-bit */
>   #define PRDT_DATA_BYTE_COUNT_PAD	4
>