From patchwork Tue Jun 27 09:45:29 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Varadarajan Narayanan X-Patchwork-Id: 9811207 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 4A88B60351 for ; Tue, 27 Jun 2017 09:48:27 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id CA4B725404 for ; Tue, 27 Jun 2017 09:48:25 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id BED912860C; Tue, 27 Jun 2017 09:48:25 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=2.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_HI,T_DKIM_INVALID autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 709D425404 for ; Tue, 27 Jun 2017 09:48:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752894AbdF0Jr5 (ORCPT ); Tue, 27 Jun 2017 05:47:57 -0400 Received: from smtp.codeaurora.org ([198.145.29.96]:52068 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752783AbdF0Jqa (ORCPT ); Tue, 27 Jun 2017 05:46:30 -0400 Received: by smtp.codeaurora.org (Postfix, from userid 1000) id 26709607C5; Tue, 27 Jun 2017 09:46:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1498556789; bh=ZWAjuVlRItF3XuFjvYuJm9YG5X+DVAcaIrXruOOWsrY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=LHgWuli4ULRHNfkC9T4vt+nDY4edrQRSTNEA1aG25BMk9VNEPsMPmz/kDEJ1PQIBm GWGakqG0y+mQjp9l1UDzpAQZyZOuE7rzUNEXUTa9xS2RWos1WM/rzYTQcUL1elsbky vI1cWzpO+04NS45JYG/3K1r3o52V2jZaVcm/ezZs= Received: from varda-linux.qualcomm.com (blr-c-bdr-fw-01_globalnat_allzones-outside.qualcomm.com [103.229.19.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: varada@smtp.codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id 61062607CE; Tue, 27 Jun 2017 09:46:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1498556788; bh=ZWAjuVlRItF3XuFjvYuJm9YG5X+DVAcaIrXruOOWsrY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=KVYbnrS1AU9HjRw/+EDAXdNRYUJ/g6tlAm/C74Nn8Zr7MqlIurGexuTvlEjFEikRB LE8gSD53rmT9ee2UhMjNkmqxha3qFgX1shbdY4H6PFrApTBFFLd/AQ+Ct+paWK3s4W kGRr81y4m2mgBpzbsYMrZ1aWY1Zuu4ap7+sw9vRM= DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 61062607CE Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=none smtp.mailfrom=varada@codeaurora.org From: Varadarajan Narayanan To: broonie@kernel.org, robh+dt@kernel.org, mark.rutland@arm.com, andy.gross@linaro.org, david.brown@linaro.org, linux-spi@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-soc@vger.kernel.org Cc: Varadarajan Narayanan , Matthew McClintock Subject: [PATCH v4 12/14] spi: qup: refactor spi_qup_prep_sg Date: Tue, 27 Jun 2017 15:15:29 +0530 Message-Id: <1498556731-13087-13-git-send-email-varada@codeaurora.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1498556731-13087-1-git-send-email-varada@codeaurora.org> References: <1498556731-13087-1-git-send-email-varada@codeaurora.org> Sender: linux-spi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Take specific sgl and nent to be prepared. This is in preparation for splitting DMA into multiple transacations, this contains no code changes just refactoring. Signed-off-by: Matthew McClintock Signed-off-by: Varadarajan Narayanan --- drivers/spi/spi-qup.c | 25 ++++++++++--------------- 1 file changed, 10 insertions(+), 15 deletions(-) diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c index 026f25e..2423ee5 100644 --- a/drivers/spi/spi-qup.c +++ b/drivers/spi/spi-qup.c @@ -382,26 +382,19 @@ static void spi_qup_write(struct spi_qup *controller) } while (remainder); } -static int spi_qup_prep_sg(struct spi_master *master, struct spi_transfer *xfer, - enum dma_transfer_direction dir, +static int spi_qup_prep_sg(struct spi_master *master, struct scatterlist *sgl, + unsigned int nents, enum dma_transfer_direction dir, dma_async_tx_callback callback, void *data) { unsigned long flags = DMA_PREP_INTERRUPT | DMA_PREP_FENCE; struct dma_async_tx_descriptor *desc; - struct scatterlist *sgl; struct dma_chan *chan; dma_cookie_t cookie; - unsigned int nents; - if (dir == DMA_MEM_TO_DEV) { + if (dir == DMA_MEM_TO_DEV) chan = master->dma_tx; - nents = xfer->tx_sg.nents; - sgl = xfer->tx_sg.sgl; - } else { + else chan = master->dma_rx; - nents = xfer->rx_sg.nents; - sgl = xfer->rx_sg.sgl; - } desc = dmaengine_prep_slave_sg(chan, sgl, nents, dir, flags); if (IS_ERR_OR_NULL(desc)) @@ -444,8 +437,9 @@ static int spi_qup_do_dma(struct spi_device *spi, struct spi_transfer *xfer, } if (xfer->rx_buf) { - ret = spi_qup_prep_sg(master, xfer, DMA_DEV_TO_MEM, - spi_qup_dma_done, &qup->rxc); + ret = spi_qup_prep_sg(master, xfer->rx_sg.sgl, + xfer->rx_sg.nents, DMA_DEV_TO_MEM, + spi_qup_dma_done, &qup->rxc); if (ret) return ret; @@ -453,8 +447,9 @@ static int spi_qup_do_dma(struct spi_device *spi, struct spi_transfer *xfer, } if (xfer->tx_buf) { - ret = spi_qup_prep_sg(master, xfer, DMA_MEM_TO_DEV, - spi_qup_dma_done, &qup->txc); + ret = spi_qup_prep_sg(master, xfer->tx_sg.sgl, + xfer->tx_sg.nents, DMA_MEM_TO_DEV, + spi_qup_dma_done, &qup->txc); if (ret) return ret;