From sac-owner Thu Nov 11 16:37:16 2004 Received: from sunmail3.sfbay.sun.com (sunmail3.SFBay.Sun.COM [129.149.247.180]) by sac.sfbay.sun.com (8.12.9+Sun/8.12.9) with ESMTP id iAC0bGac005601 for ; Thu, 11 Nov 2004 16:37:16 -0800 (PST) Received: (from noaccess@localhost) by sunmail3.sfbay.sun.com (8.11.7p1+Sun/8.11.7/ENSMAIL,v2.2) id iAC0b6H09238 for one-pager-not-2b-used-directly; Thu, 11 Nov 2004 16:37:06 -0800 (PST) Received: from westmail2san.west.sun.com (westmail2san.West.Sun.COM [129.153.85.6]) by sunmail3.sfbay.sun.com (8.11.7p1+Sun/8.11.7/ENSMAIL,v2.2) with ESMTP id iAC0b4M09220; Thu, 11 Nov 2004 16:37:04 -0800 (PST) Received: from azaka2.West.Sun.COM (azaka2.West.Sun.COM [10.1.48.179]) by westmail2san.west.sun.com (8.12.10+Sun/8.12.10/ENSMAIL,v2.2) with ESMTP id iAC0b4YW004354; Thu, 11 Nov 2004 16:37:04 -0800 (PST) Received: from azaka2 (azaka2 [10.1.48.179]) by azaka2.West.Sun.COM (8.12.9+Sun/8.12.2) with SMTP id iAC0T9Fh001729; Thu, 11 Nov 2004 16:29:09 -0800 (PST) Message-Id: <200411120029.iAC0T9Fh001729@azaka2.West.Sun.COM> Date: Thu, 11 Nov 2004 16:29:09 -0800 (PST) From: Nagendra Singamsetty Reply-To: Nagendra Singamsetty Subject: [/]SATA HBA Framework Support To: one-pager@sun.com MIME-Version: 1.0 Content-Type: TEXT/plain; charset=us-ascii Content-MD5: ldIoUlS2d3Nk3SPJUHtcNw== X-Mailer: dtmail 1.3.0 @(#)CDE Version 1.5_47 SunOS 5.9 sun4u sparc Status: RO Content-Length: 10904 Template Version: @(#)onepager.txt 1.26 03/08/27 SMI This information is Copyright 2006 Sun Microsystems 1. Introduction 1.1. Project/Component Working Name: SATA HBA Framework Support 1.2. Name of Document Author/Supplier: Prasad Singamsetty 1.3. Date of This Document: 11/11/04 1.4. Name of Major Document Customer(s)/Consumer(s): 1.4.1. The PAC or CPT you expect to review your project: Solaris PAC 1.4.2. The ARC(s) you expect to review your project: PSARC 1.4.3. The Director/VP who is "Sponsoring" this project: Andrew K. Roach 1.4.4. The name of your business unit: OPG 1.5. Email Aliases: 1.5.1. Responsible Manager: Neal Pollack 1.5.2. Responsible Engineer: Pawel Wojcik 1.5.3. Marketing Manager: Chris Baker 1.5.4. Interest List: sata-dev 2. Project Summary 2.1. Project Description: Serial ATA (SATA) is the next generation storage interconnect, designed to replace parallel ATA technology. Serial ATA International Organization (SATA-IO) is the group responsible for defining the specification and driving the adoption of this technology. See the reference [1] for more information on this technology. The existing support for SATA controllers in Solaris 10 (starting from build 62) is limited to controllers operating in the basic ATA compatibility (legacy) mode. The objective of this project is to provide formal native mode SATA support in Solaris enabling extended features such as hotplug, NCQ, etc. This project provides framework for writing new SATA controller drivers that use current SCSA framework and 'sd' target driver. The implementation is based on the SATA specification version 1.0a. The SATA Framework would implement generic SATA operations and interface with SCSA framework. The SATA Framework will take care of SCSI to SATA translations, hotplug support, port multiplier support, etc. and the controller specific SATA HBA driver will only deal with hw specific implementation. The project will be implemented in two phases. Phase-I will define and implement SATA Framework interfaces as a kernel module and implement SATA HBA driver for Marvel controller hardware using the new SATA framework. The SATA framework interfaces will be committed as Consolidation Private interfaces initially. The functionality provided in this phase include support for hot plugging of SATA drives, port multipler support (see [2]), etc. Phase-I components will be tested on the new NSG platform, code named ........., that uses Marvel SATA controller (88SX5080). The main components delivered in the phase-I are: * SATA Framework kernel module * cfgadm(1m) plug-in for SATA hotplug feature * SATA HBA driver for Marvel controller hardware (88SX50??) Phase-II of this project will raise the commitment level on the refined SATA Framework interfaces to 'Evolving' state. This would allow third party driver writers to implement new SATA HBA drivers. This phase will also deliver documentation to support writing new SATA HBA drivers and a code template for a sample driver. Note: Additional SATA HBA drivers (e.g: SiliconImage 3124, ICH6, Nforce4, etc.) may be developed in parallel to this project but with a dependency on phase-I components. Also, phase-I components will be tested and delivered only for x86 platforms. 2.2. Risks and Assumptions: This technology is very quickly adopted into the current/new server and desktop platforms and it is necessary to support this technology in Solaris to take advantage of the new SATA features. 3. Business Summary 3.1. Problem Area: The current support for SATA controllers in Solaris 10 (starting from build 62) is limited to controllers operating in a compatibility mode, emulating generic parallel ATA controllers. This uses only the generic ATA interfaces and doesn't take advantage of the native SATA features like Native Command Queuing, extended DMA, etc.. Some of the issues with the current support for SATA controllers include: * Existing pci-ide/ata framework interfaces are not public, thus requiring Sun to invest into development of drivers for any new SATA controllers. * Hotplug feature is not supported in pci-ide/ata framework. * 'cmdk' target driver doesn't have all the functionality as in 'sd' driver (e.g: Tag Queuing feature). * Newer SATA controllers may not support ATA compatibility mode (e.g: Marvel) so the current pci-ide/ata framework is not adequate to support them. * The current 'cmdk' devinfo model doesn't cover all SATA hw configurations (e.g: port multiplier, multiple ports for each controller, etc.). * SATA controllers like Marvel (and may be others) identify themselves as scsi controllers. Due to the above issues the 'sd' target driver framework is more suitable to support new SATA controllers. 3.2. Market/Requester: NSG platforms .... based on Opteron processors use the new SATA controllers. SATA hotplug feature is one of the requirements for ....... platform. Also, there are several new platforms from OEMs like Intel, Dell, HP, etc. that use new SATA controller interfaces which are considered Tier 1 systems for Solaris/X86 market. 3.3. Business Justification: This project is important to support new SATA controllers for NSG platforms and Tier 1 systems from OEMs which are based on Intel or AMD (Opteron) processors. 3.4. Competitive Analysis: Other operating systems like Windows, Linux already have support for new SATA controllers with advanced features like hotplug. 3.5. Opportunity Window/Exposure: Serial ATA (SATA) and Serial Attached SCSI (SAS) are the new generation of higher performance storage technology for desktop as well as low end server platforms. 3.6. How will you know when you are done?: New SATA driver for Marvel controller will use the new SATA framework so testing that driver and functionality such as hoptlug will verify that the framework is complete. 4. Technical Description: 4.1 SATA driver software architecture The proposed SATA driver architecture model consists of the following components: * SATA HBA Framework (new): Implemented as a kernel module that interfaces with the SCSA framework and provides generic SATA interfaces to hw specific SATA HBA driver. * SATA HBA driver(new): Controller/Hardware specific driver (e.g: Marvel driver) in Solaris written for the interfaces defined by the SATA HBA Framework. * SCSA Framework: The current SCSA framework in Solaris. * SD target driver: The current Solaris 'sd' driver. * cfgadm(1m) plugin for SATA (new): Implements SATA specific hotplug operations for cfgadm(1m) framework. The Figure below illustrates the basic driver model. ................... | cfgadm | ........^.......... | v +=================+ | SATA Hot Plug | SATA specific | library | plug-in +=======^===-===-=+ library | Solaris i/o | ^ | | User ======================|=========================|================ | | Kernel | ........v.......... | | SD driver | | .......^........... | | +=========v==========+ ........v.......... | SATA HBA Framework |<---->| SCSA Framework | +=========^==========+ ................... | +=========v==========+ | SATA HBA Driver | | (eg. Marvel driver)| +====================+ | V ( SATA devices: SATA disks, ATAPI CDROMs, ...) 4.2 Changes to Solaris SATA Framework kernel module: This will be a new common platform independent module to support SATA HBA drivers. This module exports new SATA Framework interfaces for the SATA HBA drivers. cfgadm(1m) plugin: Hotplug support for SATA drives differ from the existing SCSI Hotplug implementation so a new plug-in will be created to support SATA device hotplugging. Boot support: It is expected that the new boot subsystem (see PSARC/2004/454) will be integrated into Solaris 10 Update 2 and any changes needed to support booting from SATA disks that use new SATA HBA drivers will be made to the new boot system. It is not considered a requirement (at least for phase-I) to support booting for the current boot architecture in Solaris/X86 which require real-mode drivers to support booting. Marvel driver (new): This project will implement SATA HBA driver for Marvel controller (88SX508? & 88SX504?) with support for hotplug feature. Power Management: Currently Power Management framework is not yet supported in Solaris/X86 so no specific PM requirements are considered in this project. Note: The phase-I deliverables are only tested and delivered for Solaris/X86 platform. SPARC platforms requiring this feature may enable this from a separate project. 5. Reference Documents: [1] Serial ATA 1.0a Specification http://http://www.serialata.org/specifications.asp [2] Serial ATA II: Port Multipler, Revision 1.1 http://http://www.serialata.org/specifications.asp [3] Marvel SATA Host Controller (88SX50xx) specifications http://marvell.com/products/storage/sata/index.jsp 6. Resources and Schedule: 6.1. Projected Availability: Q2CY05 6.2. Cost of Effort: Estimated cost of the project is 2 staff years. 6.3. Cost of Capital Resources: Required hardware and prototype systems from NSG are already available to do this project. 6.4. Product Approval Committee requested information: 6.4.1. Consolidation Name: ON Consolidation 6.4.2. Contributing OpCo/BU/Division Name: OPG 6.4.3. Type of PAC Review and Approval expected: FastTrack 6.4.4. Project Boundary Conditions: TBD 6.4.5. Is this a necessary project for OEM agreements: N/A 6.4.6. Notes/Dependencies: None. 6.4.7. Target RTI Date/Release: RTI Q2CY05; Solaris 11 (Nevada) and Solaris 10 Update 2 6.4.8. Target Code Design Review Date: 6.4.9. Update approval addition: N/A 6.5. ARC review type: Standard PSARC review. 7. Prototype Availability: 7.1. Prototype Availability: Q4CY04 7.2. Prototype Cost: Estimated cost is about 6 staff months.