From owner-cvs-src@FreeBSD.ORG Wed Dec 14 03:26:49 2005 Return-Path: X-Original-To: cvs-src@FreeBSD.org Delivered-To: cvs-src@FreeBSD.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id EA2F716A41F; Wed, 14 Dec 2005 03:26:49 +0000 (GMT) (envelope-from scottl@FreeBSD.org) Received: from repoman.freebsd.org (repoman.freebsd.org [216.136.204.115]) by mx1.FreeBSD.org (Postfix) with ESMTP id 5ABA443D45; Wed, 14 Dec 2005 03:26:49 +0000 (GMT) (envelope-from scottl@FreeBSD.org) Received: from repoman.freebsd.org (localhost [127.0.0.1]) by repoman.freebsd.org (8.13.1/8.13.1) with ESMTP id jBE3QnMQ010667; Wed, 14 Dec 2005 03:26:49 GMT (envelope-from scottl@repoman.freebsd.org) Received: (from scottl@localhost) by repoman.freebsd.org (8.13.1/8.13.1/Submit) id jBE3QnUT010666; Wed, 14 Dec 2005 03:26:49 GMT (envelope-from scottl) Message-Id: <200512140326.jBE3QnUT010666@repoman.freebsd.org> From: Scott Long Date: Wed, 14 Dec 2005 03:26:49 +0000 (UTC) To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org X-FreeBSD-CVS-Branch: HEAD Cc: Subject: cvs commit: src/sys/dev/amr amr.c amr_cam.c amr_disk.c amr_pci.c amrio.h amrreg.h amrvar.h X-BeenThere: cvs-src@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: CVS commit messages for the src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 14 Dec 2005 03:26:50 -0000 scottl 2005-12-14 03:26:49 UTC FreeBSD src repository Modified files: sys/dev/amr amr.c amr_cam.c amr_disk.c amr_pci.c amrio.h amrreg.h amrvar.h Log: Mega update to the LSI MegaRAID driver: 1. Implement a large set of ioctl shims so that the Linux management apps from LSI will work. This includes infrastructure to support adding, deleting and rescanning arrays at runtime. This is based on work from Doug Ambrosko, heavily augmented by LSI and Yahoo. 2. Implement full 64-bit DMA support. Systems with more than 4GB of RAM can now operate without the cost of bounce buffers. Cards that cannot do 64-bit DMA will automatically revert to using bounce buffers. This option can be forced off by setting the 'hw.amr.force_sg32" tunable in the loader. It should only be turned off for debugging purposes. This work was sponsored by Yahoo. 3. Streamline the command delivery and interrupt handler paths after much discussion with Dell and LSI. The logic now closely matches the intended design, making it both more robust and much faster. Certain i/o failures under heavy load should be fixed with this. 4. Optimize the locking. In the interrupt handler, the card can be checked for completed commands without any locks held, due to the handler being implicitely serialized and there being no need to look at any shared data. Only grab the lock to return the command structure to the free pool. A small optimization can still be made to collect all of the completions together and then free them together under a single lock. Items 3 and 4 significantly increase the performance of the driver. On an LSI 320-2X card, transactions per second went from 13,000 to 31,000 in my testing with these changes. However, these changes are still fairly experimental and shouldn't be merged to 6.x until there is more testing. Thanks to Doug Ambrosko, LSI, Dell, and Yahoo for contributing towards this. Revision Changes Path 1.71 +739 -203 src/sys/dev/amr/amr.c 1.18 +9 -6 src/sys/dev/amr/amr_cam.c 1.38 +2 -2 src/sys/dev/amr/amr_disk.c 1.32 +121 -61 src/sys/dev/amr/amr_pci.c 1.7 +1 -1 src/sys/dev/amr/amrio.h 1.9 +50 -6 src/sys/dev/amr/amrreg.h 1.29 +28 -7 src/sys/dev/amr/amrvar.h