From mboxrd@z Thu Jan 1 00:00:00 1970 From: akpm@linux-foundation.org Subject: [patch 2/7] Dell CERC support for megaraid_mbox Date: Tue, 04 Mar 2008 15:24:22 -0800 Message-ID: <200803042324.m24NOM3A003084@imap1.linux-foundation.org> Return-path: Received: from smtp1.linux-foundation.org ([140.211.169.13]:54860 "EHLO smtp1.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934496AbYCDXYx (ORCPT ); Tue, 4 Mar 2008 18:24:53 -0500 Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: James.Bottomley@HansenPartnership.com Cc: linux-scsi@vger.kernel.org, akpm@linux-foundation.org, hare@suse.de, Bo.Yang@lsi.com, James.Bottomley@SteelEye.com, Sumant.Patro@lsi.com From: Hannes Reinecke Newer Dell CERC firmware (>= 6.62) implement a random deletion handling compatible with the legacy megaraid driver. The legacy handling shifted the target ID by 0x80 only for I/O commands (READ/WRITE/etc), whereas megaraid_mbox shifts the target ID always if random deletion is supported. The resulted in megaraid_mbox sending an INQUIRY to the wrong channel, and not finding any devices, obviously. So we disable the random deletion support if the offending firmware is found. Addresses http://bugzilla.kernel.org/show_bug.cgi?id=6695 Signed-off-by: Hannes Reinecke Cc: "Patro, Sumant" Cc: James Bottomley Cc: "Yang, Bo" Signed-off-by: Andrew Morton --- drivers/scsi/megaraid/megaraid_mbox.c | 17 +++++++++++++++++ drivers/scsi/megaraid/megaraid_mbox.h | 1 + 2 files changed, 18 insertions(+) diff -puN drivers/scsi/megaraid/megaraid_mbox.c~dell-cerc-support-for-megaraid_mbox drivers/scsi/megaraid/megaraid_mbox.c --- a/drivers/scsi/megaraid/megaraid_mbox.c~dell-cerc-support-for-megaraid_mbox +++ a/drivers/scsi/megaraid/megaraid_mbox.c @@ -3168,6 +3168,23 @@ megaraid_mbox_support_random_del(adapter uint8_t raw_mbox[sizeof(mbox_t)]; int rval; + /* + * Newer firmware on Dell CERC expect a different + * random deletion handling, so disable it. + */ + if (adapter->pdev->vendor == PCI_VENDOR_ID_AMI && + adapter->pdev->device == PCI_DEVICE_ID_AMI_MEGARAID3 && + adapter->pdev->subsystem_vendor == PCI_VENDOR_ID_DELL && + adapter->pdev->subsystem_device == PCI_SUBSYS_ID_CERC_ATA100_4CH && + (adapter->fw_version[0] > '6' || + (adapter->fw_version[0] == '6' && + adapter->fw_version[2] > '6') || + (adapter->fw_version[0] == '6' + && adapter->fw_version[2] == '6' + && adapter->fw_version[3] > '1'))) { + con_log(CL_DLEVEL1, ("megaraid: disable random deletion\n")); + return 0; + } mbox = (mbox_t *)raw_mbox; diff -puN drivers/scsi/megaraid/megaraid_mbox.h~dell-cerc-support-for-megaraid_mbox drivers/scsi/megaraid/megaraid_mbox.h --- a/drivers/scsi/megaraid/megaraid_mbox.h~dell-cerc-support-for-megaraid_mbox +++ a/drivers/scsi/megaraid/megaraid_mbox.h @@ -88,6 +88,7 @@ #define PCI_SUBSYS_ID_PERC3_QC 0x0471 #define PCI_SUBSYS_ID_PERC3_DC 0x0493 #define PCI_SUBSYS_ID_PERC3_SC 0x0475 +#define PCI_SUBSYS_ID_CERC_ATA100_4CH 0x0511 #define MBOX_MAX_SCSI_CMDS 128 // number of cmds reserved for kernel _