From patchwork Tue Nov 4 10:42:43 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Adrian Hunter X-Patchwork-Id: 5225111 Return-Path: X-Original-To: patchwork-linux-mmc@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 6F179C11AC for ; Tue, 4 Nov 2014 10:44:45 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 9DDCC201EF for ; Tue, 4 Nov 2014 10:44:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 99A5A201BC for ; Tue, 4 Nov 2014 10:44:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752661AbaKDKoi (ORCPT ); Tue, 4 Nov 2014 05:44:38 -0500 Received: from mga14.intel.com ([192.55.52.115]:34410 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752867AbaKDKof (ORCPT ); Tue, 4 Nov 2014 05:44:35 -0500 Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga103.fm.intel.com with ESMTP; 04 Nov 2014 02:38:20 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.07,312,1413270000"; d="scan'208";a="616733033" Received: from ahunter-desktop.fi.intel.com ([10.237.72.97]) by fmsmga001.fm.intel.com with ESMTP; 04 Nov 2014 02:44:32 -0800 From: Adrian Hunter To: Ulf Hansson , Chris Ball Cc: linux-mmc Subject: [PATCH V2 09/15] mmc: sdhci: Define maximum segments Date: Tue, 4 Nov 2014 12:42:43 +0200 Message-Id: <1415097769-19032-10-git-send-email-adrian.hunter@intel.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1415097769-19032-1-git-send-email-adrian.hunter@intel.com> References: <1415097769-19032-1-git-send-email-adrian.hunter@intel.com> Organization: Intel Finland Oy, Registered Address: PL 281, 00181 Helsinki, Business Identity Code: 0357606 - 4, Domiciled in Helsinki Sender: linux-mmc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org X-Spam-Status: No, score=-7.5 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Define the maximum number of segments instead of having the constant 128 appearing in the code in various places. Signed-off-by: Adrian Hunter Signed-off-by: Ulf Hansson --- drivers/mmc/host/sdhci.c | 8 ++++---- drivers/mmc/host/sdhci.h | 6 ++++++ 2 files changed, 10 insertions(+), 4 deletions(-) diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index 053b55d..586c739 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -2877,8 +2877,8 @@ int sdhci_add_host(struct sdhci_host *host) * descriptor for each segment, plus 1 for a nop end descriptor, * all multipled by the descriptor size. */ - host->adma_table_sz = (128 * 2 + 1) * 8; - host->align_buffer_sz = 128 * 4; + host->adma_table_sz = (SDHCI_MAX_SEGS * 2 + 1) * 8; + host->align_buffer_sz = SDHCI_MAX_SEGS * 4; host->desc_sz = 8; host->align_sz = 4; host->align_mask = 3; @@ -3192,11 +3192,11 @@ int sdhci_add_host(struct sdhci_host *host) * can do scatter/gather or not. */ if (host->flags & SDHCI_USE_ADMA) - mmc->max_segs = 128; + mmc->max_segs = SDHCI_MAX_SEGS; else if (host->flags & SDHCI_USE_SDMA) mmc->max_segs = 1; else /* PIO */ - mmc->max_segs = 128; + mmc->max_segs = SDHCI_MAX_SEGS; /* * Maximum number of sectors in one transfer. Limited by DMA boundary diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h index 31896a7..6ae75cd 100644 --- a/drivers/mmc/host/sdhci.h +++ b/drivers/mmc/host/sdhci.h @@ -266,6 +266,12 @@ #define SDHCI_DEFAULT_BOUNDARY_SIZE (512 * 1024) #define SDHCI_DEFAULT_BOUNDARY_ARG (ilog2(SDHCI_DEFAULT_BOUNDARY_SIZE) - 12) +/* + * Maximum segments assuming a 512KiB maximum requisition size and a minimum + * 4KiB page size. + */ +#define SDHCI_MAX_SEGS 128 + struct sdhci_ops { #ifdef CONFIG_MMC_SDHCI_IO_ACCESSORS u32 (*read_l)(struct sdhci_host *host, int reg);