Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 1c3afc42 authored by Moger, Babu's avatar Moger, Babu Committed by James Bottomley
Browse files

[SCSI] scsi_dh_rdac : Detect the different RDAC operating modes 



This patch detects different operating RDAC modes during the
discovery. It also collects the information about the preferred path.

Signed-off-by: default avatarBabu Moger <babu.moger@lsi.com>
Reviewed-by: default avatarYanling Qi <yanling.qi@lsi.com>
Reviewed-by: default avatarSudhir Dachepalli <Sudhir.Dachepalli@lis.com>
Reviewed-by: default avatarSomasundaram Krishnasamy <Somasundaram.Krishnasamy@lsi.com>
Reviewed-by: default avatarBob Stankey <Robert.Stankey@lsi.com>
Reviewed-by: default avatarVijay Chauhan <Vijay.Chauhan@lsi.com>
Signed-off-by: default avatarJames Bottomley <James.Bottomley@suse.de>
parent eebe9b96

drivers/scsi/device_handler/scsi_dh_rdac.c

+20 −13
Original line number Original line Diff line number Diff line
@@ -194,7 +194,6 @@ struct rdac_dh_data { 




#define RDAC_LUN_UNOWNED	0

#define RDAC_LUN_UNOWNED	0

#define RDAC_LUN_OWNED		1

#define RDAC_LUN_OWNED		1

#define RDAC_LUN_AVT		2

	char			lun_state;

	char			lun_state;





#define RDAC_PREFERRED		0

#define RDAC_PREFERRED		0
@@ -473,25 +472,33 @@ static int check_ownership(struct scsi_device *sdev, struct rdac_dh_data *h) 
	int err;

	int err;

	struct c9_inquiry *inqp;

	struct c9_inquiry *inqp;





	h->lun_state = RDAC_LUN_UNOWNED;

	h->state = RDAC_STATE_ACTIVE;

	h->state = RDAC_STATE_ACTIVE;

	err = submit_inquiry(sdev, 0xC9, sizeof(struct c9_inquiry), h);

	err = submit_inquiry(sdev, 0xC9, sizeof(struct c9_inquiry), h);

	if (err == SCSI_DH_OK) {

	if (err == SCSI_DH_OK) {

		inqp = &h->inq.c9;

		inqp = &h->inq.c9;

		if ((inqp->avte_cvp >> 7) == 0x1) {

		/* detect the operating mode */

			/* LUN in AVT mode */

		if ((inqp->avte_cvp >> 5) & 0x1)

			sdev_printk(KERN_NOTICE, sdev,

			h->mode = RDAC_MODE_IOSHIP; /* LUN in IOSHIP mode */

				    "%s: AVT mode detected\n",

		else if (inqp->avte_cvp >> 7)

				    RDAC_NAME);

			h->mode = RDAC_MODE_AVT; /* LUN in AVT mode */

			h->lun_state = RDAC_LUN_AVT;

		else

		} else if ((inqp->avte_cvp & 0x1) != 0) {

			h->mode = RDAC_MODE; /* LUN in RDAC mode */

			/* LUN was owned by the controller */



		/* Update ownership */

		if (inqp->avte_cvp & 0x1)

			h->lun_state = RDAC_LUN_OWNED;

			h->lun_state = RDAC_LUN_OWNED;

		}

		else {

			h->lun_state = RDAC_LUN_UNOWNED;

			if (h->mode == RDAC_MODE)

				h->state = RDAC_STATE_PASSIVE;

		}

		}





	if (h->lun_state == RDAC_LUN_UNOWNED)

		/* Update path prio*/

		h->state = RDAC_STATE_PASSIVE;

		if (inqp->path_prio & 0x1)

			h->preferred = RDAC_PREFERRED;

		else

			h->preferred = RDAC_NON_PREFERRED;

	}





	return err;

	return err;

}

}