From patchwork Wed Apr 27 11:15:39 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andy Shevchenko X-Patchwork-Id: 8955771 Return-Path: X-Original-To: patchwork-dmaengine@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 8B40B9F1C1 for ; Wed, 27 Apr 2016 11:17:44 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 916DC200CC for ; Wed, 27 Apr 2016 11:17:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 84328200F0 for ; Wed, 27 Apr 2016 11:17:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752854AbcD0LRc (ORCPT ); Wed, 27 Apr 2016 07:17:32 -0400 Received: from mga11.intel.com ([192.55.52.93]:3325 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752244AbcD0LP5 (ORCPT ); Wed, 27 Apr 2016 07:15:57 -0400 Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga102.fm.intel.com with ESMTP; 27 Apr 2016 04:15:54 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.24,541,1455004800"; d="scan'208";a="953959555" Received: from black.fi.intel.com ([10.237.72.93]) by fmsmga001.fm.intel.com with ESMTP; 27 Apr 2016 04:15:42 -0700 Received: by black.fi.intel.com (Postfix, from userid 1003) id 504062CA; Wed, 27 Apr 2016 14:15:41 +0300 (EEST) From: Andy Shevchenko To: Viresh Kumar , Vinod Koul , linux-kernel@vger.kernel.org, dmaengine@vger.kernel.org, Rob Herring , Mark Brown , Vineet Gupta , Tejun Heo Cc: Andy Shevchenko Subject: [PATCH v7 3/4] dmaengine: dw: keep entire platform data in struct dw_dma Date: Wed, 27 Apr 2016 14:15:39 +0300 Message-Id: <1461755740-3932-4-git-send-email-andriy.shevchenko@linux.intel.com> X-Mailer: git-send-email 2.8.0.rc3 In-Reply-To: <1461755740-3932-1-git-send-email-andriy.shevchenko@linux.intel.com> References: <1461755740-3932-1-git-send-email-andriy.shevchenko@linux.intel.com> Sender: dmaengine-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: dmaengine@vger.kernel.org X-Spam-Status: No, score=-7.9 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 Keep the entire platform data in the struct dw_dma. It makes the driver a bit cleaner. Acked-by: Viresh Kumar Signed-off-by: Andy Shevchenko --- drivers/dma/dw/core.c | 30 +++++++++++++++--------------- drivers/dma/dw/platform.c | 4 ++-- drivers/dma/dw/regs.h | 5 ++--- include/linux/platform_data/dma-dw.h | 2 +- 4 files changed, 20 insertions(+), 21 deletions(-) diff --git a/drivers/dma/dw/core.c b/drivers/dma/dw/core.c index 992da25..30843a1 100644 --- a/drivers/dma/dw/core.c +++ b/drivers/dma/dw/core.c @@ -665,7 +665,7 @@ dwc_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dest, dma_addr_t src, u8 m_master = dwc->m_master; unsigned int src_width; unsigned int dst_width; - unsigned int data_width = dw->data_width[m_master]; + unsigned int data_width = dw->pdata->data_width[m_master]; u32 ctllo; u8 lms = DWC_LLP_LMS(m_master); @@ -745,7 +745,7 @@ dwc_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl, dma_addr_t reg; unsigned int reg_width; unsigned int mem_width; - unsigned int data_width = dw->data_width[m_master]; + unsigned int data_width = dw->pdata->data_width[m_master]; unsigned int i; struct scatterlist *sg; size_t total_len = 0; @@ -1444,7 +1444,6 @@ int dw_dma_probe(struct dw_dma_chip *chip, struct dw_dma_platform_data *pdata) struct dw_dma *dw; bool autocfg = false; unsigned int dw_params; - unsigned int max_blk_size = 0; unsigned int i; int err; @@ -1452,6 +1451,10 @@ int dw_dma_probe(struct dw_dma_chip *chip, struct dw_dma_platform_data *pdata) if (!dw) return -ENOMEM; + dw->pdata = devm_kzalloc(chip->dev, sizeof(*dw->pdata), GFP_KERNEL); + if (!dw->pdata) + return -ENOMEM; + dw->regs = chip->regs; chip->dw = dw; @@ -1467,11 +1470,8 @@ int dw_dma_probe(struct dw_dma_chip *chip, struct dw_dma_platform_data *pdata) goto err_pdata; } - pdata = devm_kzalloc(chip->dev, sizeof(*pdata), GFP_KERNEL); - if (!pdata) { - err = -ENOMEM; - goto err_pdata; - } + /* Reassign the platform data pointer */ + pdata = dw->pdata; /* Get hardware configuration parameters */ pdata->nr_channels = (dw_params >> DW_PARAMS_NR_CHAN & 7) + 1; @@ -1480,7 +1480,7 @@ int dw_dma_probe(struct dw_dma_chip *chip, struct dw_dma_platform_data *pdata) pdata->data_width[i] = 4 << (dw_params >> DW_PARAMS_DATA_WIDTH(i) & 3); } - max_blk_size = dma_readl(dw, MAX_BLK_SIZE); + pdata->block_size = dma_readl(dw, MAX_BLK_SIZE); /* Fill platform data with the default values */ pdata->is_private = true; @@ -1490,6 +1490,11 @@ int dw_dma_probe(struct dw_dma_chip *chip, struct dw_dma_platform_data *pdata) } else if (pdata->nr_channels > DW_DMA_MAX_NR_CHANNELS) { err = -EINVAL; goto err_pdata; + } else { + memcpy(dw->pdata, pdata, sizeof(*dw->pdata)); + + /* Reassign the platform data pointer */ + pdata = dw->pdata; } dw->chan = devm_kcalloc(chip->dev, pdata->nr_channels, sizeof(*dw->chan), @@ -1499,11 +1504,6 @@ int dw_dma_probe(struct dw_dma_chip *chip, struct dw_dma_platform_data *pdata) goto err_pdata; } - /* Get hardware configuration parameters */ - dw->nr_masters = pdata->nr_masters; - for (i = 0; i < dw->nr_masters; i++) - dw->data_width[i] = pdata->data_width[i]; - /* Calculate all channel mask before DMA setup */ dw->all_chan_mask = (1 << pdata->nr_channels) - 1; @@ -1570,7 +1570,7 @@ int dw_dma_probe(struct dw_dma_chip *chip, struct dw_dma_platform_data *pdata) * up to 0x0a for 4095. */ dwc->block_size = - (4 << ((max_blk_size >> 4 * i) & 0xf)) - 1; + (4 << ((pdata->block_size >> 4 * i) & 0xf)) - 1; dwc->nollp = (dwc_params >> DWC_PARAMS_MBLK_EN & 0x1) == 0; } else { diff --git a/drivers/dma/dw/platform.c b/drivers/dma/dw/platform.c index 2420fb7..0a49011 100644 --- a/drivers/dma/dw/platform.c +++ b/drivers/dma/dw/platform.c @@ -47,8 +47,8 @@ static struct dma_chan *dw_dma_of_xlate(struct of_phandle_args *dma_spec, if (WARN_ON(slave.src_id >= DW_DMA_MAX_NR_REQUESTS || slave.dst_id >= DW_DMA_MAX_NR_REQUESTS || - slave.m_master >= dw->nr_masters || - slave.p_master >= dw->nr_masters)) + slave.m_master >= dw->pdata->nr_masters || + slave.p_master >= dw->pdata->nr_masters)) return NULL; dma_cap_zero(cap); diff --git a/drivers/dma/dw/regs.h b/drivers/dma/dw/regs.h index 0ab02eb..4b7bd78 100644 --- a/drivers/dma/dw/regs.h +++ b/drivers/dma/dw/regs.h @@ -281,9 +281,8 @@ struct dw_dma { u8 all_chan_mask; u8 in_use; - /* hardware configuration */ - unsigned char nr_masters; - unsigned char data_width[DW_DMA_MAX_NR_MASTERS]; + /* platform data */ + struct dw_dma_platform_data *pdata; }; static inline struct dw_dma_regs __iomem *__dw_regs(struct dw_dma *dw) diff --git a/include/linux/platform_data/dma-dw.h b/include/linux/platform_data/dma-dw.h index ad76811..d15d8ba 100644 --- a/include/linux/platform_data/dma-dw.h +++ b/include/linux/platform_data/dma-dw.h @@ -55,7 +55,7 @@ struct dw_dma_platform_data { #define CHAN_PRIORITY_ASCENDING 0 /* chan0 highest */ #define CHAN_PRIORITY_DESCENDING 1 /* chan7 highest */ unsigned char chan_priority; - unsigned short block_size; + unsigned int block_size; unsigned char nr_masters; unsigned char data_width[DW_DMA_MAX_NR_MASTERS]; };