From patchwork Sun May 6 18:18:43 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dan Williams X-Patchwork-Id: 157145 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 78E84B6FAF for ; Mon, 7 May 2012 04:02:56 +1000 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754567Ab2EFSCx (ORCPT ); Sun, 6 May 2012 14:02:53 -0400 Received: from mga11.intel.com ([192.55.52.93]:26408 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754543Ab2EFSCu (ORCPT ); Sun, 6 May 2012 14:02:50 -0400 Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga102.fm.intel.com with ESMTP; 06 May 2012 11:02:50 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.71,315,1320652800"; d="scan'208";a="162634010" Received: from dwillia2-linux.jf.intel.com ([10.23.45.110]) by fmsmga002.fm.intel.com with ESMTP; 06 May 2012 11:02:50 -0700 Received: from dwillia2-linux.jf.intel.com (localhost.localdomain [IPv6:::1]) by dwillia2-linux.jf.intel.com (Postfix) with ESMTP id 47C8C80010; Sun, 6 May 2012 11:18:43 -0700 (PDT) Subject: [PATCH 09/18] libsas: trim sas_task of slow path infrastructure To: linux-scsi@vger.kernel.org From: Dan Williams Cc: linux-ide@vger.kernel.org, Christoph Hellwig , Jack Wang Date: Sun, 06 May 2012 11:18:43 -0700 Message-ID: <20120506181843.17912.8162.stgit@dwillia2-linux.jf.intel.com> In-Reply-To: <20120506181611.17912.3798.stgit@dwillia2-linux.jf.intel.com> References: <20120506181611.17912.3798.stgit@dwillia2-linux.jf.intel.com> User-Agent: StGit/0.16-1-g7004 MIME-Version: 1.0 Sender: linux-ide-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-ide@vger.kernel.org The timer and the completion are only used for slow path tasks (smp, and lldd tmfs), yet we incur the allocation space and cpu setup time for every fast path task. Cc: Christoph Hellwig Acked-by: Jack Wang Signed-off-by: Dan Williams --- drivers/scsi/libsas/sas_expander.c | 20 ++++++++++---------- drivers/scsi/libsas/sas_init.c | 23 +++++++++++++++++++++-- drivers/scsi/libsas/sas_scsi_host.c | 8 ++++++-- drivers/scsi/mvsas/mv_sas.c | 20 ++++++++++---------- drivers/scsi/pm8001/pm8001_sas.c | 34 +++++++++++++++++----------------- include/scsi/libsas.h | 14 +++++++++----- 6 files changed, 73 insertions(+), 46 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html diff --git a/drivers/scsi/libsas/sas_expander.c b/drivers/scsi/libsas/sas_expander.c index caa0525..f1e8e0a 100644 --- a/drivers/scsi/libsas/sas_expander.c +++ b/drivers/scsi/libsas/sas_expander.c @@ -51,14 +51,14 @@ static void smp_task_timedout(unsigned long _task) task->task_state_flags |= SAS_TASK_STATE_ABORTED; spin_unlock_irqrestore(&task->task_state_lock, flags); - complete(&task->completion); + complete(&task->slow_task->completion); } static void smp_task_done(struct sas_task *task) { - if (!del_timer(&task->timer)) + if (!del_timer(&task->slow_task->timer)) return; - complete(&task->completion); + complete(&task->slow_task->completion); } /* Give it some long enough timeout. In seconds. */ @@ -79,7 +79,7 @@ static int smp_execute_task(struct domain_device *dev, void *req, int req_size, break; } - task = sas_alloc_task(GFP_KERNEL); + task = sas_alloc_slow_task(GFP_KERNEL); if (!task) { res = -ENOMEM; break; @@ -91,20 +91,20 @@ static int smp_execute_task(struct domain_device *dev, void *req, int req_size, task->task_done = smp_task_done; - task->timer.data = (unsigned long) task; - task->timer.function = smp_task_timedout; - task->timer.expires = jiffies + SMP_TIMEOUT*HZ; - add_timer(&task->timer); + task->slow_task->timer.data = (unsigned long) task; + task->slow_task->timer.function = smp_task_timedout; + task->slow_task->timer.expires = jiffies + SMP_TIMEOUT*HZ; + add_timer(&task->slow_task->timer); res = i->dft->lldd_execute_task(task, 1, GFP_KERNEL); if (res) { - del_timer(&task->timer); + del_timer(&task->slow_task->timer); SAS_DPRINTK("executing SMP task failed:%d\n", res); break; } - wait_for_completion(&task->completion); + wait_for_completion(&task->slow_task->completion); res = -ECOMM; if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) { SAS_DPRINTK("smp task timed out or aborted\n"); diff --git a/drivers/scsi/libsas/sas_init.c b/drivers/scsi/libsas/sas_init.c index 1bbab3d..014297c 100644 --- a/drivers/scsi/libsas/sas_init.c +++ b/drivers/scsi/libsas/sas_init.c @@ -48,18 +48,37 @@ struct sas_task *sas_alloc_task(gfp_t flags) INIT_LIST_HEAD(&task->list); spin_lock_init(&task->task_state_lock); task->task_state_flags = SAS_TASK_STATE_PENDING; - init_timer(&task->timer); - init_completion(&task->completion); } return task; } EXPORT_SYMBOL_GPL(sas_alloc_task); +struct sas_task *sas_alloc_slow_task(gfp_t flags) +{ + struct sas_task *task = sas_alloc_task(flags); + struct sas_task_slow *slow = kmalloc(sizeof(*slow), flags); + + if (!task || !slow) { + if (task) + kmem_cache_free(sas_task_cache, task); + kfree(slow); + return NULL; + } + + task->slow_task = slow; + init_timer(&slow->timer); + init_completion(&slow->completion); + + return task; +} +EXPORT_SYMBOL_GPL(sas_alloc_slow_task); + void sas_free_task(struct sas_task *task) { if (task) { BUG_ON(!list_empty(&task->list)); + kfree(task->slow_task); kmem_cache_free(sas_task_cache, task); } } diff --git a/drivers/scsi/libsas/sas_scsi_host.c b/drivers/scsi/libsas/sas_scsi_host.c index 6764148..6e795a1 100644 --- a/drivers/scsi/libsas/sas_scsi_host.c +++ b/drivers/scsi/libsas/sas_scsi_host.c @@ -1134,9 +1134,13 @@ void sas_task_abort(struct sas_task *task) /* Escape for libsas internal commands */ if (!sc) { - if (!del_timer(&task->timer)) + struct sas_task_slow *slow = task->slow_task; + + if (!slow) + return; + if (!del_timer(&slow->timer)) return; - task->timer.function(task->timer.data); + slow->timer.function(slow->timer.data); return; } diff --git a/drivers/scsi/mvsas/mv_sas.c b/drivers/scsi/mvsas/mv_sas.c index fd3b283..7d46c1a 100644 --- a/drivers/scsi/mvsas/mv_sas.c +++ b/drivers/scsi/mvsas/mv_sas.c @@ -1365,9 +1365,9 @@ void mvs_dev_gone(struct domain_device *dev) static void mvs_task_done(struct sas_task *task) { - if (!del_timer(&task->timer)) + if (!del_timer(&task->slow_task->timer)) return; - complete(&task->completion); + complete(&task->slow_task->completion); } static void mvs_tmf_timedout(unsigned long data) @@ -1375,7 +1375,7 @@ static void mvs_tmf_timedout(unsigned long data) struct sas_task *task = (struct sas_task *)data; task->task_state_flags |= SAS_TASK_STATE_ABORTED; - complete(&task->completion); + complete(&task->slow_task->completion); } #define MVS_TASK_TIMEOUT 20 @@ -1386,7 +1386,7 @@ static int mvs_exec_internal_tmf_task(struct domain_device *dev, struct sas_task *task = NULL; for (retry = 0; retry < 3; retry++) { - task = sas_alloc_task(GFP_KERNEL); + task = sas_alloc_slow_task(GFP_KERNEL); if (!task) return -ENOMEM; @@ -1396,20 +1396,20 @@ static int mvs_exec_internal_tmf_task(struct domain_device *dev, memcpy(&task->ssp_task, parameter, para_len); task->task_done = mvs_task_done; - task->timer.data = (unsigned long) task; - task->timer.function = mvs_tmf_timedout; - task->timer.expires = jiffies + MVS_TASK_TIMEOUT*HZ; - add_timer(&task->timer); + task->slow_task->timer.data = (unsigned long) task; + task->slow_task->timer.function = mvs_tmf_timedout; + task->slow_task->timer.expires = jiffies + MVS_TASK_TIMEOUT*HZ; + add_timer(&task->slow_task->timer); res = mvs_task_exec(task, 1, GFP_KERNEL, NULL, 1, tmf); if (res) { - del_timer(&task->timer); + del_timer(&task->slow_task->timer); mv_printk("executing internel task failed:%d\n", res); goto ex_err; } - wait_for_completion(&task->completion); + wait_for_completion(&task->slow_task->completion); res = TMF_RESP_FUNC_FAILED; /* Even TMF timed out, return direct. */ if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) { diff --git a/drivers/scsi/pm8001/pm8001_sas.c b/drivers/scsi/pm8001/pm8001_sas.c index fdbba57..b961112 100644 --- a/drivers/scsi/pm8001/pm8001_sas.c +++ b/drivers/scsi/pm8001/pm8001_sas.c @@ -650,9 +650,9 @@ int pm8001_dev_found(struct domain_device *dev) static void pm8001_task_done(struct sas_task *task) { - if (!del_timer(&task->timer)) + if (!del_timer(&task->slow_task->timer)) return; - complete(&task->completion); + complete(&task->slow_task->completion); } static void pm8001_tmf_timedout(unsigned long data) @@ -660,7 +660,7 @@ static void pm8001_tmf_timedout(unsigned long data) struct sas_task *task = (struct sas_task *)data; task->task_state_flags |= SAS_TASK_STATE_ABORTED; - complete(&task->completion); + complete(&task->slow_task->completion); } #define PM8001_TASK_TIMEOUT 20 @@ -683,7 +683,7 @@ static int pm8001_exec_internal_tmf_task(struct domain_device *dev, struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev); for (retry = 0; retry < 3; retry++) { - task = sas_alloc_task(GFP_KERNEL); + task = sas_alloc_slow_task(GFP_KERNEL); if (!task) return -ENOMEM; @@ -691,21 +691,21 @@ static int pm8001_exec_internal_tmf_task(struct domain_device *dev, task->task_proto = dev->tproto; memcpy(&task->ssp_task, parameter, para_len); task->task_done = pm8001_task_done; - task->timer.data = (unsigned long)task; - task->timer.function = pm8001_tmf_timedout; - task->timer.expires = jiffies + PM8001_TASK_TIMEOUT*HZ; - add_timer(&task->timer); + task->slow_task->timer.data = (unsigned long)task; + task->slow_task->timer.function = pm8001_tmf_timedout; + task->slow_task->timer.expires = jiffies + PM8001_TASK_TIMEOUT*HZ; + add_timer(&task->slow_task->timer); res = pm8001_task_exec(task, 1, GFP_KERNEL, 1, tmf); if (res) { - del_timer(&task->timer); + del_timer(&task->slow_task->timer); PM8001_FAIL_DBG(pm8001_ha, pm8001_printk("Executing internal task " "failed\n")); goto ex_err; } - wait_for_completion(&task->completion); + wait_for_completion(&task->slow_task->completion); res = -TMF_RESP_FUNC_FAILED; /* Even TMF timed out, return direct. */ if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) { @@ -765,17 +765,17 @@ pm8001_exec_internal_task_abort(struct pm8001_hba_info *pm8001_ha, struct sas_task *task = NULL; for (retry = 0; retry < 3; retry++) { - task = sas_alloc_task(GFP_KERNEL); + task = sas_alloc_slow_task(GFP_KERNEL); if (!task) return -ENOMEM; task->dev = dev; task->task_proto = dev->tproto; task->task_done = pm8001_task_done; - task->timer.data = (unsigned long)task; - task->timer.function = pm8001_tmf_timedout; - task->timer.expires = jiffies + PM8001_TASK_TIMEOUT * HZ; - add_timer(&task->timer); + task->slow_task->timer.data = (unsigned long)task; + task->slow_task->timer.function = pm8001_tmf_timedout; + task->slow_task->timer.expires = jiffies + PM8001_TASK_TIMEOUT * HZ; + add_timer(&task->slow_task->timer); res = pm8001_tag_alloc(pm8001_ha, &ccb_tag); if (res) @@ -789,13 +789,13 @@ pm8001_exec_internal_task_abort(struct pm8001_hba_info *pm8001_ha, pm8001_dev, flag, task_tag, ccb_tag); if (res) { - del_timer(&task->timer); + del_timer(&task->slow_task->timer); PM8001_FAIL_DBG(pm8001_ha, pm8001_printk("Executing internal task " "failed\n")); goto ex_err; } - wait_for_completion(&task->completion); + wait_for_completion(&task->slow_task->completion); res = TMF_RESP_FUNC_FAILED; /* Even TMF timed out, return direct. */ if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) { diff --git a/include/scsi/libsas.h b/include/scsi/libsas.h index 7c4bd08..996ee7c 100644 --- a/include/scsi/libsas.h +++ b/include/scsi/libsas.h @@ -612,10 +612,6 @@ struct sas_task { enum sas_protocol task_proto; - /* Used by the discovery code. */ - struct timer_list timer; - struct completion completion; - union { struct sas_ata_task ata_task; struct sas_smp_task smp_task; @@ -632,8 +628,15 @@ struct sas_task { void *lldd_task; /* for use by LLDDs */ void *uldd_task; + struct sas_task_slow *slow_task; +}; - struct work_struct abort_work; +struct sas_task_slow { + /* standard/extra infrastructure for slow path commands (SMP and + * internal lldd commands + */ + struct timer_list timer; + struct completion completion; }; #define SAS_TASK_STATE_PENDING 1 @@ -643,6 +646,7 @@ struct sas_task { #define SAS_TASK_AT_INITIATOR 16 extern struct sas_task *sas_alloc_task(gfp_t flags); +extern struct sas_task *sas_alloc_slow_task(gfp_t flags); extern void sas_free_task(struct sas_task *task); struct sas_domain_function_template {