Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756513Ab1CHXKJ (ORCPT ); Tue, 8 Mar 2011 18:10:09 -0500 Received: from g1t0026.austin.hp.com ([15.216.28.33]:21023 "EHLO g1t0026.austin.hp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756432Ab1CHXKE (ORCPT ); Tue, 8 Mar 2011 18:10:04 -0500 Subject: [PATCH 2/2] hpsa: export resettable_on_kexec host attribute To: james.bottomley@hansenpartnership.com From: "Stephen M. Cameron" Cc: linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org, smcameron@yahoo.com, thenzl@redhat.com, akpm@linux-foundation.org, mikem@beardog.cce.hp.com Date: Tue, 08 Mar 2011 17:10:03 -0600 Message-ID: <20110308231003.22291.20417.stgit@beardog.cce.hp.com> In-Reply-To: <20110308230749.22291.56200.stgit@beardog.cce.hp.com> References: <20110308230749.22291.56200.stgit@beardog.cce.hp.com> User-Agent: StGit/0.15 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2960 Lines: 86 From: Stephen M. Cameron This attribute, requested by Redhat, allows kexec-tools to know whether the controller can honor the reset_devices kernel parameter and actually reset the controller. For kdump to work properly it is necessary that the reset_devices parameter be honored. This attribute enables kexec-tools to warn the user if they attempt to designate a non-resettable controller as the dump device. Signed-off-by: Stephen M. Cameron --- drivers/scsi/hpsa.c | 41 +++++++++++++++++++++++++++++++++++++++++ 1 files changed, 41 insertions(+), 0 deletions(-) diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c index dcabef4..1d4fe80 100644 --- a/drivers/scsi/hpsa.c +++ b/drivers/scsi/hpsa.c @@ -273,6 +273,44 @@ static ssize_t host_show_transport_mode(struct device *dev, "performant" : "simple"); } +/* List of controllers which cannot be reset on kexec with reset_devices */ +static u32 unresettable_controller[] = { + 0x324a103C, /* Smart Array P712m */ + 0x324b103C, /* SmartArray P711m */ + 0x3223103C, /* Smart Array P800 */ + 0x3234103C, /* Smart Array P400 */ + 0x3235103C, /* Smart Array P400i */ + 0x3211103C, /* Smart Array E200i */ + 0x3212103C, /* Smart Array E200 */ + 0x3213103C, /* Smart Array E200i */ + 0x3214103C, /* Smart Array E200i */ + 0x3215103C, /* Smart Array E200i */ + 0x3237103C, /* Smart Array E500 */ + 0x3223103C, /* Smart Array P800 */ + 0x3234103C, /* Smart Array P400 */ + 0x323D103C, /* Smart Array P700m */ +}; + +static int resettable_on_kexec(struct ctlr_info *h) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(unresettable_controller); i++) + if (unresettable_controller[i] == h->board_id) + return 0; + return 1; +} + +static ssize_t host_show_resettable_on_kexec(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct ctlr_info *h; + struct Scsi_Host *shost = class_to_shost(dev); + + h = shost_to_hba(shost); + return snprintf(buf, 20, "%d\n", resettable_on_kexec(h)); +} + static inline int is_logical_dev_addr_mode(unsigned char scsi3addr[]) { return (scsi3addr[3] & 0xC0) == 0x40; @@ -379,6 +417,8 @@ static DEVICE_ATTR(commands_outstanding, S_IRUGO, host_show_commands_outstanding, NULL); static DEVICE_ATTR(transport_mode, S_IRUGO, host_show_transport_mode, NULL); +static DEVICE_ATTR(resettable_on_kexec, S_IRUGO, + host_show_resettable_on_kexec, NULL); static struct device_attribute *hpsa_sdev_attrs[] = { &dev_attr_raid_level, @@ -392,6 +432,7 @@ static struct device_attribute *hpsa_shost_attrs[] = { &dev_attr_firmware_revision, &dev_attr_commands_outstanding, &dev_attr_transport_mode, + &dev_attr_resettable_on_kexec, NULL, }; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/