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From:   Christoph Hellwig <hch@lst.de>
To:     Mauro Carvalho Chehab <mchehab@kernel.org>,
        Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
        "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>,
        Joonyoung Shim <jy0922.shim@samsung.com>,
        Seung-Woo Kim <sw0312.kim@samsung.com>,
        Ben Skeggs <bskeggs@redhat.com>,
        Marek Szyprowski <m.szyprowski@samsung.com>,
        Tomasz Figa <tfiga@chromium.org>,
        Matt Porter <mporter@kernel.crashing.org>,
        iommu@lists.linux-foundation.org
Cc:     Stefan Richter <stefanr@s5r6.in-berlin.de>,
        linux1394-devel@lists.sourceforge.net, linux-doc@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-media@vger.kernel.org,
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        alsa-devel@alsa-project.org
Subject: [PATCH 09/18] sgiwd93: convert to dma_alloc_noncoherent
Date:   Tue, 15 Sep 2020 17:51:13 +0200
Message-Id: <20200915155122.1768241-10-hch@lst.de>
In-Reply-To: <20200915155122.1768241-1-hch@lst.de>
References: <20200915155122.1768241-1-hch@lst.de>
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Sender: linux-kernel-owner@vger.kernel.org
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Use the new non-coherent DMA API including proper ownership transfers.
This also means we can allocate the memory as DMA_TO_DEVICE instead
of bidirectional.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 drivers/scsi/sgiwd93.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/scsi/sgiwd93.c b/drivers/scsi/sgiwd93.c
index 3bdf0deb8f1529..cf1030c9dda17f 100644
--- a/drivers/scsi/sgiwd93.c
+++ b/drivers/scsi/sgiwd93.c
@@ -95,7 +95,7 @@ void fill_hpc_entries(struct ip22_hostdata *hd, struct scsi_cmnd *cmd, int din)
 	 */
 	hcp->desc.pbuf = 0;
 	hcp->desc.cntinfo = HPCDMA_EOX;
-	dma_cache_sync(hd->dev, hd->cpu,
+	dma_sync_single_for_device(hd->dev, hd->dma,
 		       (unsigned long)(hcp + 1) - (unsigned long)hd->cpu,
 		       DMA_TO_DEVICE);
 }
@@ -234,8 +234,8 @@ static int sgiwd93_probe(struct platform_device *pdev)
 
 	hdata = host_to_hostdata(host);
 	hdata->dev = &pdev->dev;
-	hdata->cpu = dma_alloc_attrs(&pdev->dev, HPC_DMA_SIZE, &hdata->dma,
-				     GFP_KERNEL, DMA_ATTR_NON_CONSISTENT);
+	hdata->cpu = dma_alloc_noncoherent(&pdev->dev, HPC_DMA_SIZE,
+				&hdata->dma, DMA_TO_DEVICE, GFP_KERNEL);
 	if (!hdata->cpu) {
 		printk(KERN_WARNING "sgiwd93: Could not allocate memory for "
 		       "host %d buffer.\n", unit);
@@ -274,8 +274,8 @@ static int sgiwd93_probe(struct platform_device *pdev)
 out_irq:
 	free_irq(irq, host);
 out_free:
-	dma_free_attrs(&pdev->dev, HPC_DMA_SIZE, hdata->cpu, hdata->dma,
-		       DMA_ATTR_NON_CONSISTENT);
+	dma_free_noncoherent(&pdev->dev, HPC_DMA_SIZE, hdata->cpu, hdata->dma,
+			DMA_TO_DEVICE);
 out_put:
 	scsi_host_put(host);
 out:
@@ -291,8 +291,8 @@ static int sgiwd93_remove(struct platform_device *pdev)
 
 	scsi_remove_host(host);
 	free_irq(pd->irq, host);
-	dma_free_attrs(&pdev->dev, HPC_DMA_SIZE, hdata->cpu, hdata->dma,
-		       DMA_ATTR_NON_CONSISTENT);
+	dma_free_noncoherent(&pdev->dev, HPC_DMA_SIZE, hdata->cpu, hdata->dma,
+			DMA_TO_DEVICE);
 	scsi_host_put(host);
 	return 0;
 }
-- 
2.28.0