linux-kernel - RE: [PATCH 1/12] scsi: megaraid_sas - Online Controller Reset - I: Enable Online Controller Reset Bit in register related functions

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Date:	Tue, 20 Jul 2010 07:08:19 -0600
From:	"Yang, Bo" <Bo.Yang@....com>
To:	"Yang, Bo" <Bo.Yang@....com>,
	James Bottomley <James.Bottomley@...e.de>
CC:	Yinghai Lu <yinghai@...nel.org>,
	"linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
	"akpm@...l.org" <akpm@...l.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH 1/12] scsi: megaraid_sas - Online Controller Reset - I:
 Enable Online Controller Reset Bit in register related functions

James,

Do you get chances to view this changes and apply the patches to the main tree?

Thanks,

Bo Yang

-----Original Message-----
From: Yang, Bo 
Sent: Monday, June 21, 2010 11:36 AM
To: 'James Bottomley'
Cc: Yinghai Lu; linux-scsi@...r.kernel.org; akpm@...l.org; linux-kernel@...r.kernel.org
Subject: RE: [PATCH 1/12] scsi: megaraid_sas - Online Controller Reset - I: Enable Online Controller Reset Bit in register related functions

James,

Attached is the changelog for OCR. 

Signed-off-by Bo Yang<bo.yang@....com>

---
Documentation/scsi/ChangeLog.megaraid_sas |   33 ++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff -rupN old/Documentation/scsi/ChangeLog.megaraid_sas new/Documentation/scsi/ChangeLog.megaraid_sas
--- old/Documentation/scsi/ChangeLog.megaraid_sas	2010-06-20 03:41:31.000000000 -0400
+++ new/Documentation/scsi/ChangeLog.megaraid_sas	2010-06-20 03:55:42.000000000 -0400
@@ -1,3 +1,36 @@
+1 Release Date    : Thur.  May 03, 2010 09:12:45 PST 2009 -
+			(emaild-id:megaraidlinux@....com)
+			Bo Yang
+
+2 Current Version : 00.00.04.17.1-rc1
+3 Older Version   : 00.00.04.17.1-rc1
+
+1.	Add the Online Controller Reset (OCR) to the Driver.
+	OCR is the new feature for megaraid_sas driver which
+	will allow the fw to do the chip reset which will not
+	affact the OS behavious.
+
+	To add the OCR support, driver need to do: 
+		a). reset the controller chips -- Xscale and Gen2 which
+		will change the function calls and add the reset function
+		related to this two chips.
+		
+		b). during the reset, driver will store the pending cmds
+		which not returned by FW to driver's pending queue.  Driver
+		will re-issue those pending cmds again to FW after the OCR
+		finished.
+		
+		c). In driver's timeout routine, driver will report to
+		OS as reset. Also driver's queue routine will block the
+		cmds until the OCR finished.
+		
+		d). in Driver's ISR routine, if driver get the FW state as
+		state change, FW in Failure status and FW support online controller
+		reset (OCR), driver will start to do the controller reset.
+		
+		e). In driver's IOCTL routine, the application cmds will wait for the
+		OCR to finish, then issue the cmds to FW.
+		 
 1 Release Date    : Thur.  Oct 29, 2009 09:12:45 PST 2009 -
 			(emaild-id:megaraidlinux@....com)
 			Bo Yang


-----Original Message-----
From: James Bottomley [mailto:James.Bottomley@...e.de] 
Sent: Sunday, June 20, 2010 4:49 PM
To: Yang, Bo
Cc: Yinghai Lu; linux-scsi@...r.kernel.org; akpm@...l.org; linux-kernel@...r.kernel.org
Subject: RE: [PATCH 1/12] scsi: megaraid_sas - Online Controller Reset - I: Enable Online Controller Reset Bit in register related functions

On Sun, 2010-06-20 at 14:19 -0600, Yang, Bo wrote:
> Yes.  

OK, can you give me the single changelog for this one commit, then,
please?

Thanks,

James