Commit 729c8456 authored by Anil Ravindranath's avatar Anil Ravindranath Committed by James Bottomley
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[SCSI] pmcraid: support SMI-S object model of storage pool 



PMC-Sierra mgmt application uses SMI-S model. According to SMI-S, the
object model exposed by the SMI-S provider should show an StoragePool
which contains member disks of a RAID Virtual disk and StorageVolume
based on the StoragePool. But according to SMI-S, there is a possibility
where StoragePool is created but StorageVolume is not yet created. To
satisfy this scenario, we are trying a hidden RAID Virtual disk. The
hidden RAID virtual disk will not be exposed to OS. Once a StorageVolume
is created for this RAID virtual disk it is exposed.

Signed-off-by: default avatarAnil <Ravindranath&lt;anil_ravindranath@pmc-sierra.com>
Signed-off-by: default avatarJames Bottomley <James.Bottomley@suse.de>
parent 48de68a4

drivers/scsi/pmcraid.c

+25 −9
Original line number Diff line number Diff line 
/*

 * pmcraid.c -- driver for PMC Sierra MaxRAID controller adapters

 *

 * Written By: PMC Sierra Corporation

 * Written By: Anil Ravindranath<anil_ravindranath@pmc-sierra.com>

 *             PMC-Sierra Inc

 *

 * Copyright (C) 2008, 2009 PMC Sierra Inc

 *
@@ -79,7 +80,7 @@ DECLARE_BITMAP(pmcraid_minor, PMCRAID_MAX_ADAPTERS); 
/*

 * Module parameters

 */

MODULE_AUTHOR("PMC Sierra Corporation, anil_ravindranath@pmc-sierra.com");

MODULE_AUTHOR("Anil Ravindranath<anil_ravindranath@pmc-sierra.com>");

MODULE_DESCRIPTION("PMC Sierra MaxRAID Controller Driver");

MODULE_LICENSE("GPL");

MODULE_VERSION(PMCRAID_DRIVER_VERSION);
@@ -162,10 +163,10 @@ static int pmcraid_slave_alloc(struct scsi_device *scsi_dev) 
	spin_lock_irqsave(&pinstance->resource_lock, lock_flags);

	list_for_each_entry(temp, &pinstance->used_res_q, queue) {



		/* do not expose VSETs with order-ids >= 240 */

		/* do not expose VSETs with order-ids > MAX_VSET_TARGETS */

		if (RES_IS_VSET(temp->cfg_entry)) {

			target = temp->cfg_entry.unique_flags1;

			if (target >= PMCRAID_MAX_VSET_TARGETS)

			if (target > PMCRAID_MAX_VSET_TARGETS)

				continue;

			bus = PMCRAID_VSET_BUS_ID;

			lun = 0;
@@ -1210,7 +1211,7 @@ static int pmcraid_expose_resource(struct pmcraid_config_table_entry *cfgte) 
	int retval = 0;



	if (cfgte->resource_type == RES_TYPE_VSET)

		retval = ((cfgte->unique_flags1 & 0xFF) < 0xFE);

		retval = ((cfgte->unique_flags1 & 0x80) == 0);

	else if (cfgte->resource_type == RES_TYPE_GSCSI)

		retval = (RES_BUS(cfgte->resource_address) !=

				PMCRAID_VIRTUAL_ENCL_BUS_ID);
@@ -1361,6 +1362,7 @@ static int pmcraid_notify_aen(struct pmcraid_instance *pinstance, u8 type) 
 * Return value:

 *  none

 */



static void pmcraid_handle_config_change(struct pmcraid_instance *pinstance)

{

	struct pmcraid_config_table_entry *cfg_entry;
@@ -1368,9 +1370,10 @@ static void pmcraid_handle_config_change(struct pmcraid_instance *pinstance) 
	struct pmcraid_cmd *cmd;

	struct pmcraid_cmd *cfgcmd;

	struct pmcraid_resource_entry *res = NULL;

	u32 new_entry = 1;

	unsigned long lock_flags;

	unsigned long host_lock_flags;

	u32 new_entry = 1;

	u32 hidden_entry = 0;

	int rc;



	ccn_hcam = (struct pmcraid_hcam_ccn *)pinstance->ccn.hcam;
@@ -1406,9 +1409,15 @@ static void pmcraid_handle_config_change(struct pmcraid_instance *pinstance) 
	}



	/* If this resource is not going to be added to mid-layer, just notify

	 * applications and return

	 * applications and return. If this notification is about hiding a VSET

	 * resource, check if it was exposed already.

	 */

	if (!pmcraid_expose_resource(cfg_entry))

	if (pinstance->ccn.hcam->notification_type ==

	    NOTIFICATION_TYPE_ENTRY_CHANGED &&

	    cfg_entry->resource_type == RES_TYPE_VSET &&

	    cfg_entry->unique_flags1 & 0x80) {

		hidden_entry = 1;

	} else if (!pmcraid_expose_resource(cfg_entry))

		goto out_notify_apps;



	spin_lock_irqsave(&pinstance->resource_lock, lock_flags);
@@ -1424,6 +1433,12 @@ static void pmcraid_handle_config_change(struct pmcraid_instance *pinstance) 


	if (new_entry) {



		if (hidden_entry) {

			spin_unlock_irqrestore(&pinstance->resource_lock,

						lock_flags);

			goto out_notify_apps;

		}



		/* If there are more number of resources than what driver can

		 * manage, do not notify the applications about the CCN. Just

		 * ignore this notifications and re-register the same HCAM
@@ -1454,8 +1469,9 @@ static void pmcraid_handle_config_change(struct pmcraid_instance *pinstance) 
		sizeof(struct pmcraid_config_table_entry));



	if (pinstance->ccn.hcam->notification_type ==

	    NOTIFICATION_TYPE_ENTRY_DELETED) {

	    NOTIFICATION_TYPE_ENTRY_DELETED || hidden_entry) {

		if (res->scsi_dev) {

			res->cfg_entry.unique_flags1 &= 0x7F;

			res->change_detected = RES_CHANGE_DEL;

			res->cfg_entry.resource_handle =

				PMCRAID_INVALID_RES_HANDLE;

drivers/scsi/pmcraid.h

+4 −1
Original line number Diff line number Diff line 
/*

 * pmcraid.h -- PMC Sierra MaxRAID controller driver header file

 *

 * Written By: Anil Ravindranath<anil_ravindranath@pmc-sierra.com>

 *             PMC-Sierra Inc

 *

 * Copyright (C) 2008, 2009 PMC Sierra Inc.

 *

 * This program is free software; you can redistribute it and/or modify
@@ -106,7 +109,7 @@ 
#define PMCRAID_VSET_LUN_ID                      0x0

#define PMCRAID_PHYS_BUS_ID                      0x0

#define PMCRAID_VIRTUAL_ENCL_BUS_ID              0x8

#define PMCRAID_MAX_VSET_TARGETS                 240

#define PMCRAID_MAX_VSET_TARGETS                 0x7F

#define PMCRAID_MAX_VSET_LUNS_PER_TARGET         8



#define PMCRAID_IOA_MAX_SECTORS                  32767

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