From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754126AbcEDPcf (ORCPT ); Wed, 4 May 2016 11:32:35 -0400 Received: from mail-wm0-f53.google.com ([74.125.82.53]:35087 "EHLO mail-wm0-f53.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753594AbcEDPcB (ORCPT ); Wed, 4 May 2016 11:32:01 -0400 From: "=?UTF-8?q?Javier=20Gonz=C3=A1lez?=" X-Google-Original-From: =?UTF-8?q?Javier=20Gonz=C3=A1lez?= To: mb@lightnvm.io Cc: linux-kernel@vger.kernel.org, linux-block@vger.kernel.org, =?UTF-8?q?Javier=20Gonz=C3=A1lez?= Subject: [PATCH 4/4] lightnvm: Precalculate max/min sectors per req. Date: Wed, 4 May 2016 17:31:32 +0200 Message-Id: <1462375892-26533-4-git-send-email-javier@cnexlabs.com> X-Mailer: git-send-email 2.5.0 In-Reply-To: <1462375892-26533-1-git-send-email-javier@cnexlabs.com> References: <1462375892-26533-1-git-send-email-javier@cnexlabs.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add two precalculated values to nvm_rq: (i) maximum number of sectors per general request; and (ii) minimum number of sectors per write request. Signed-off-by: Javier González --- drivers/lightnvm/core.c | 3 +++ include/linux/lightnvm.h | 4 +++- 2 files changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c index 4cd9803..85682d91 100644 --- a/drivers/lightnvm/core.c +++ b/drivers/lightnvm/core.c @@ -573,6 +573,9 @@ static int nvm_core_init(struct nvm_dev *dev) dev->plane_mode = NVM_PLANE_SINGLE; dev->max_rq_size = dev->ops->max_phys_sect * dev->sec_size; + dev->max_sec_rq = dev->ops->max_phys_sect; + /* assume max_phys_sect % dev->min_write_pgs == 0 */ + dev->min_sec_w_rq = dev->sec_per_pl * (dev->sec_size / PAGE_SIZE); if (grp->mpos & 0x020202) dev->plane_mode = NVM_PLANE_DOUBLE; diff --git a/include/linux/lightnvm.h b/include/linux/lightnvm.h index 67e72f5..c2dfd0c 100644 --- a/include/linux/lightnvm.h +++ b/include/linux/lightnvm.h @@ -351,7 +351,9 @@ struct nvm_dev { /* Calculated/Cached values. These do not reflect the actual usable * blocks at run-time. */ - int max_rq_size; + int max_rq_size; /* maximum size of a single request */ + int max_sec_rq; /* maximum amount of sectors that fit in one req. */ + int min_sec_w_rq; /* minimum amount of sectors required on write req. */ int plane_mode; /* drive device in single, double or quad mode */ int sec_per_pl; /* all sectors across planes */ -- 2.5.0