From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753285AbdLEJzf (ORCPT ); Tue, 5 Dec 2017 04:55:35 -0500 Received: from mail-pf0-f173.google.com ([209.85.192.173]:36283 "EHLO mail-pf0-f173.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753098AbdLEJzM (ORCPT ); Tue, 5 Dec 2017 04:55:12 -0500 X-Google-Smtp-Source: AGs4zMbqYSPG3i5o2gF+dXErwgMkFP5weFX4v9DbO8BE9CfaFpGl8QQFRi12xCd60RBAlUY6D1XJ5w== Subject: [PATCH 8/17] scsi: arcmsr: add driver option cmd_per_lun to set host->cmd_per_lun value by user From: Ching Huang To: martin.petersen@oracle.com, linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org Cc: James.Bottomley@HansenPartnership.com, sfr@canb.auug.org.au Content-Type: text/plain; charset="UTF-8" Date: Tue, 05 Dec 2017 09:55:02 +0800 Message-ID: <1512438902.4577.55.camel@Centos6.3-64> Mime-Version: 1.0 X-Mailer: Evolution 2.32.3 (2.32.3-37.el6) Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Ching Huang add driver option cmd_per_lun to set host->cmd_per_lun value by user Signed-off-by: Ching Huang --- diff -uprN a/drivers/scsi/arcmsr/arcmsr.h b/drivers/scsi/arcmsr/arcmsr.h --- a/drivers/scsi/arcmsr/arcmsr.h 2017-12-05 15:26:06.000000000 +0800 +++ b/drivers/scsi/arcmsr/arcmsr.h 2017-12-05 15:26:32.000000000 +0800 @@ -56,7 +56,9 @@ struct device_attribute; #define ARCMSR_MAX_XFER_SECTORS_C 304 #define ARCMSR_MAX_TARGETID 17 #define ARCMSR_MAX_TARGETLUN 8 -#define ARCMSR_MAX_CMD_PERLUN ARCMSR_MAX_OUTSTANDING_CMD +#define ARCMSR_MAX_CMD_PERLUN 128 +#define ARCMSR_DEFAULT_CMD_PERLUN 32 +#define ARCMSR_MIN_CMD_PERLUN 1 #define ARCMSR_MAX_QBUFFER 4096 #define ARCMSR_DEFAULT_SG_ENTRIES 38 #define ARCMSR_MAX_HBB_POSTQUEUE 264 diff -uprN a/drivers/scsi/arcmsr/arcmsr_hba.c b/drivers/scsi/arcmsr/arcmsr_hba.c --- a/drivers/scsi/arcmsr/arcmsr_hba.c 2017-12-05 11:46:30.000000000 +0800 +++ b/drivers/scsi/arcmsr/arcmsr_hba.c 2017-12-05 11:46:18.000000000 +0800 @@ -79,6 +79,10 @@ static int host_can_queue = ARCMSR_DEFAU module_param(host_can_queue, int, S_IRUGO); MODULE_PARM_DESC(host_can_queue, " adapter queue depth(32 ~ 1024), default is 128"); +static int cmd_per_lun = ARCMSR_DEFAULT_CMD_PERLUN; +module_param(cmd_per_lun, int, S_IRUGO); +MODULE_PARM_DESC(cmd_per_lun, " device queue depth(1 ~ 128), default is 32"); + #define ARCMSR_SLEEPTIME 10 #define ARCMSR_RETRYCOUNT 12 @@ -141,7 +145,7 @@ static struct scsi_host_template arcmsr_ .this_id = ARCMSR_SCSI_INITIATOR_ID, .sg_tablesize = ARCMSR_DEFAULT_SG_ENTRIES, .max_sectors = ARCMSR_MAX_XFER_SECTORS_C, - .cmd_per_lun = ARCMSR_MAX_CMD_PERLUN, + .cmd_per_lun = ARCMSR_DEFAULT_CMD_PERLUN, .use_clustering = ENABLE_CLUSTERING, .shost_attrs = arcmsr_host_attrs, .no_write_same = 1, @@ -884,7 +888,9 @@ static int arcmsr_probe(struct pci_dev * if ((host_can_queue < ARCMSR_MIN_OUTSTANDING_CMD) || (host_can_queue > ARCMSR_MAX_OUTSTANDING_CMD)) host_can_queue = ARCMSR_DEFAULT_OUTSTANDING_CMD; host->can_queue = host_can_queue; /* max simultaneous cmds */ - host->cmd_per_lun = ARCMSR_MAX_CMD_PERLUN; + if ((cmd_per_lun < ARCMSR_MIN_CMD_PERLUN) || (cmd_per_lun > ARCMSR_MAX_CMD_PERLUN)) + cmd_per_lun = ARCMSR_DEFAULT_CMD_PERLUN; + host->cmd_per_lun = cmd_per_lun; host->this_id = ARCMSR_SCSI_INITIATOR_ID; host->unique_id = (bus << 8) | dev_fun; pci_set_drvdata(pdev, host);