linux-ide.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Hannes Reinecke <hare@suse.de>
To: Damien Le Moal <damien.lemoal@wdc.com>,
	Jens Axboe <axboe@kernel.dk>,
	linux-block@vger.kernel.org, linux-ide@vger.kernel.org,
	"Martin K . Petersen" <martin.petersen@oracle.com>,
	linux-scsi@vger.kernel.org
Cc: Sathya Prakash <sathya.prakash@broadcom.com>,
	Sreekanth Reddy <sreekanth.reddy@broadcom.com>,
	Suganath Prabu Subramani  <suganath-prabu.subramani@broadcom.com>
Subject: Re: [PATCH v2 4/9] libata: cleanup ata_dev_configure()
Date: Fri, 6 Aug 2021 11:07:19 +0200	[thread overview]
Message-ID: <cbba17af-a35e-a837-a5a6-1b12d6445f0a@suse.de> (raw)
In-Reply-To: <20210806074252.398482-5-damien.lemoal@wdc.com>

On 8/6/21 9:42 AM, Damien Le Moal wrote:
> Introduce the helper functions ata_dev_config_lba() and
> ata_dev_config_chs() to configure the addressing capabilities of a
> device. Each helper takes a string as argument for the addressing
> information printed after these helpers execution completes.
> 
> Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
> ---
>  drivers/ata/libata-core.c | 110 ++++++++++++++++++++------------------
>  1 file changed, 59 insertions(+), 51 deletions(-)
> 
> diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
> index b13194432e5a..2b6054cdd8fc 100644
> --- a/drivers/ata/libata-core.c
> +++ b/drivers/ata/libata-core.c
> @@ -2363,6 +2363,52 @@ static void ata_dev_config_trusted(struct ata_device *dev)
>  		dev->flags |= ATA_DFLAG_TRUSTED;
>  }
>  
> +static int ata_dev_config_lba(struct ata_device *dev,
> +			      char *info, size_t infosz)
> +{
> +	const u16 *id = dev->id;
> +	int info_ofst;
> +
> +	dev->flags |= ATA_DFLAG_LBA;
> +
> +	if (ata_id_has_lba48(id)) {
> +		dev->flags |= ATA_DFLAG_LBA48;
> +		strscpy(info, "LBA48 ", infosz);
> +
> +		if (dev->n_sectors >= (1UL << 28) &&
> +		    ata_id_has_flush_ext(id))
> +			dev->flags |= ATA_DFLAG_FLUSH_EXT;
> +	} else {
> +		strscpy(info, "LBA ", infosz);
> +	}
> +	info_ofst = strlen(info);
> +
> +	/* config NCQ */
> +	return ata_dev_config_ncq(dev, info + info_ofst,
> +				  infosz - info_ofst);
> +}
> +
> +static void ata_dev_config_chs(struct ata_device *dev,
> +			       char *info, size_t infosz)
> +{
> +	const u16 *id = dev->id;
> +
> +	/* Default translation */
> +	dev->cylinders	= id[1];
> +	dev->heads	= id[3];
> +	dev->sectors	= id[6];
> +
> +	if (ata_id_current_chs_valid(id)) {
> +		/* Current CHS translation is valid. */
> +		dev->cylinders = id[54];
> +		dev->heads     = id[55];
> +		dev->sectors   = id[56];
> +	}
> +
> +	snprintf(info, infosz, "CHS %u/%u/%u",
> +		 dev->cylinders, dev->heads, dev->sectors);
> +}
> +
>  static void ata_dev_config_devslp(struct ata_device *dev)
>  {
>  	u8 *sata_setting = dev->link->ap->sector_buf;
> @@ -2418,6 +2464,7 @@ int ata_dev_configure(struct ata_device *dev)
>  	char revbuf[7];		/* XYZ-99\0 */
>  	char fwrevbuf[ATA_ID_FW_REV_LEN+1];
>  	char modelbuf[ATA_ID_PROD_LEN+1];
> +	char lba_info[40];
>  	int rc;
>  
>  	if (!ata_dev_enabled(dev) && ata_msg_info(ap)) {
> @@ -2539,61 +2586,22 @@ int ata_dev_configure(struct ata_device *dev)
>  		}
>  
>  		if (ata_id_has_lba(id)) {
> -			const char *lba_desc;
> -			char ncq_desc[24];
> -
> -			lba_desc = "LBA";
> -			dev->flags |= ATA_DFLAG_LBA;
> -			if (ata_id_has_lba48(id)) {
> -				dev->flags |= ATA_DFLAG_LBA48;
> -				lba_desc = "LBA48";
> -
> -				if (dev->n_sectors >= (1UL << 28) &&
> -				    ata_id_has_flush_ext(id))
> -					dev->flags |= ATA_DFLAG_FLUSH_EXT;
> -			}
> -
> -			/* config NCQ */
> -			rc = ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc));
> +			rc = ata_dev_config_lba(dev, lba_info, sizeof(lba_info));
>  			if (rc)
>  				return rc;
> -
> -			/* print device info to dmesg */
> -			if (ata_msg_drv(ap) && print_info) {
> -				ata_dev_info(dev, "%s: %s, %s, max %s\n",
> -					     revbuf, modelbuf, fwrevbuf,
> -					     ata_mode_string(xfer_mask));
> -				ata_dev_info(dev,
> -					     "%llu sectors, multi %u: %s %s\n",
> -					(unsigned long long)dev->n_sectors,
> -					dev->multi_count, lba_desc, ncq_desc);
> -			}
>  		} else {
> -			/* CHS */
> -
> -			/* Default translation */
> -			dev->cylinders	= id[1];
> -			dev->heads	= id[3];
> -			dev->sectors	= id[6];
> -
> -			if (ata_id_current_chs_valid(id)) {
> -				/* Current CHS translation is valid. */
> -				dev->cylinders = id[54];
> -				dev->heads     = id[55];
> -				dev->sectors   = id[56];
> -			}
> +			ata_dev_config_chs(dev, lba_info, sizeof(lba_info));
> +		}
>  
> -			/* print device info to dmesg */
> -			if (ata_msg_drv(ap) && print_info) {
> -				ata_dev_info(dev, "%s: %s, %s, max %s\n",
> -					     revbuf,	modelbuf, fwrevbuf,
> -					     ata_mode_string(xfer_mask));
> -				ata_dev_info(dev,
> -					     "%llu sectors, multi %u, CHS %u/%u/%u\n",
> -					     (unsigned long long)dev->n_sectors,
> -					     dev->multi_count, dev->cylinders,
> -					     dev->heads, dev->sectors);
> -			}
> +		/* print device info to dmesg */
> +		if (ata_msg_drv(ap) && print_info) {
> +			ata_dev_info(dev, "%s: %s, %s, max %s\n",
> +				     revbuf, modelbuf, fwrevbuf,
> +				     ata_mode_string(xfer_mask));
> +			ata_dev_info(dev,
> +				     "%llu sectors, multi %u, %s\n",
> +				     (unsigned long long)dev->n_sectors,
> +				     dev->multi_count, lba_info);
>  		}
>  
>  		ata_dev_config_devslp(dev);
> 
Hmm. Can't say I like it.
Can't you move the second 'ata_dev_info()' call into the respective
functions, and kill the temporary buffer?

Cheers,

Hannes
-- 
Dr. Hannes Reinecke		           Kernel Storage Architect
hare@suse.de			                  +49 911 74053 688
SUSE Software Solutions Germany GmbH, Maxfeldstr. 5, 90409 Nürnberg
HRB 36809 (AG Nürnberg), GF: Felix Imendörffer

  reply	other threads:[~2021-08-06  9:07 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-06  7:42 [PATCH v2 0/9] libata cleanups and improvements Damien Le Moal
2021-08-06  7:42 ` [PATCH v2 1/9] libata: fix ata_host_alloc_pinfo() Damien Le Moal
2021-08-06  8:49   ` Hannes Reinecke
2021-08-06 14:25   ` James Bottomley
2021-08-06 14:31     ` Damien Le Moal
2021-08-06  7:42 ` [PATCH v2 2/9] libata: fix ata_host_start() Damien Le Moal
2021-08-06  8:50   ` Hannes Reinecke
2021-08-06 14:31   ` James Bottomley
2021-08-06 14:33     ` Damien Le Moal
2021-08-07  3:32     ` Damien Le Moal
2021-08-06  7:42 ` [PATCH v2 3/9] libata: cleanup device sleep capability detection Damien Le Moal
2021-08-06  8:50   ` Hannes Reinecke
2021-08-06  7:42 ` [PATCH v2 4/9] libata: cleanup ata_dev_configure() Damien Le Moal
2021-08-06  9:07   ` Hannes Reinecke [this message]
2021-08-06  9:12     ` Damien Le Moal
2021-08-06  9:28       ` Hannes Reinecke
2021-08-06  9:32         ` Damien Le Moal
2021-08-06  7:42 ` [PATCH v2 5/9] libata: cleanup NCQ priority handling Damien Le Moal
2021-08-06  9:09   ` Hannes Reinecke
2021-08-06  7:42 ` [PATCH v2 6/9] libata: fix ata_read_log_page() warning Damien Le Moal
2021-08-06  9:10   ` Hannes Reinecke
2021-08-06  7:42 ` [PATCH v2 7/9] libata: print feature list on device scan Damien Le Moal
2021-08-06  9:11   ` Hannes Reinecke
2021-08-06  7:42 ` [PATCH v2 8/9] libahci: Introduce ncq_prio_supported sysfs sttribute Damien Le Moal
2021-08-06  7:42 ` [PATCH v2 9/9] scsi: mpt3sas: Introduce sas_ncq_prio_supported " Damien Le Moal
2021-08-06  9:12   ` Hannes Reinecke
2021-08-06  9:16     ` Damien Le Moal

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=cbba17af-a35e-a837-a5a6-1b12d6445f0a@suse.de \
    --to=hare@suse.de \
    --cc=axboe@kernel.dk \
    --cc=damien.lemoal@wdc.com \
    --cc=linux-block@vger.kernel.org \
    --cc=linux-ide@vger.kernel.org \
    --cc=linux-scsi@vger.kernel.org \
    --cc=martin.petersen@oracle.com \
    --cc=sathya.prakash@broadcom.com \
    --cc=sreekanth.reddy@broadcom.com \
    --cc=suganath-prabu.subramani@broadcom.com \
    --subject='Re: [PATCH v2 4/9] libata: cleanup ata_dev_configure()' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).