From patchwork Thu Jun 9 10:29:10 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Garry X-Patchwork-Id: 12875193 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A983ECCA47E for ; Thu, 9 Jun 2022 10:37:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243031AbiFIKhG (ORCPT ); Thu, 9 Jun 2022 06:37:06 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58870 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243075AbiFIKgx (ORCPT ); Thu, 9 Jun 2022 06:36:53 -0400 Received: from frasgout.his.huawei.com (frasgout.his.huawei.com [185.176.79.56]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2565B215A42; Thu, 9 Jun 2022 03:36:28 -0700 (PDT) Received: from fraeml712-chm.china.huawei.com (unknown [172.18.147.201]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4LJgQr35Vbz67sRl; Thu, 9 Jun 2022 18:32:52 +0800 (CST) Received: from lhreml724-chm.china.huawei.com (10.201.108.75) by fraeml712-chm.china.huawei.com (10.206.15.61) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.24; Thu, 9 Jun 2022 12:36:26 +0200 Received: from localhost.localdomain (10.69.192.58) by lhreml724-chm.china.huawei.com (10.201.108.75) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.24; Thu, 9 Jun 2022 11:36:22 +0100 From: John Garry To: , , , , , , CC: , , , , , John Garry Subject: [PATCH RFC v2 09/18] scsi: ipr: Support reserved commands Date: Thu, 9 Jun 2022 18:29:10 +0800 Message-ID: <1654770559-101375-10-git-send-email-john.garry@huawei.com> X-Mailer: git-send-email 2.8.1 In-Reply-To: <1654770559-101375-1-git-send-email-john.garry@huawei.com> References: <1654770559-101375-1-git-send-email-john.garry@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.69.192.58] X-ClientProxiedBy: dggems702-chm.china.huawei.com (10.3.19.179) To lhreml724-chm.china.huawei.com (10.201.108.75) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org Support a single reserved command for ATA internal commands. We also add SHT reserved_queuecommand callback to support queueing those internal commands. Signed-off-by: John Garry --- drivers/scsi/ipr.c | 17 ++++++++++++++++- 1 file changed, 16 insertions(+), 1 deletion(-) diff --git a/drivers/scsi/ipr.c b/drivers/scsi/ipr.c index 256ec6d08c16..4f4cf39cd2bc 100644 --- a/drivers/scsi/ipr.c +++ b/drivers/scsi/ipr.c @@ -6740,6 +6740,19 @@ static const char *ipr_ioa_info(struct Scsi_Host *host) return buffer; } +static int ipr_reserved_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *scmd) +{ + struct ata_queued_cmd *qc = (struct ata_queued_cmd *)scmd->host_scribble; + struct ata_port *ap = qc->ap; + int ret; + + /* We're only going to be seeing ATA internal commands */ + spin_lock_irq(ap->lock); + ret = ata_sas_queuecmd(scmd, ap); + spin_unlock_irq(ap->lock); + return ret; +} + static struct scsi_host_template driver_template = { .module = THIS_MODULE, .name = "IPR", @@ -6749,6 +6762,7 @@ static struct scsi_host_template driver_template = { .compat_ioctl = ipr_ioctl, #endif .queuecommand = ipr_queuecommand, + .reserved_queuecommand = ipr_reserved_queuecommand, .dma_need_drain = ata_scsi_dma_need_drain, .eh_abort_handler = ipr_eh_abort, .eh_device_reset_handler = ipr_eh_dev_reset, @@ -9991,7 +10005,8 @@ static void ipr_init_ioa_cfg(struct ipr_ioa_cfg *ioa_cfg, host->unique_id = host->host_no; host->max_cmd_len = IPR_MAX_CDB_LEN; - host->can_queue = ioa_cfg->max_cmds; + host->can_queue = ioa_cfg->max_cmds - 1; + host->nr_reserved_cmds = 1; pci_set_drvdata(pdev, ioa_cfg); for (i = 0; i < ARRAY_SIZE(ioa_cfg->hrrq); i++) {