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From:   Christophe JAILLET <christophe.jaillet@wanadoo.fr>
To:     maintainers@bluecherrydvr.com, anton@corp.bluecherry.net,
        andrey_utkin@fastmail.com, ismael@iodev.co.uk, mchehab@kernel.org
Cc:     linux-media@vger.kernel.org, linux-kernel@vger.kernel.org,
        kernel-janitors@vger.kernel.org,
        Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Subject: [PATCH] media: solo6x10: switch from 'pci_' to 'dma_' API
Date:   Fri, 27 Nov 2020 21:34:40 +0100
Message-Id: <20201127203440.1381359-1-christophe.jaillet@wanadoo.fr>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

The wrappers in include/linux/pci-dma-compat.h should go away.

The patch has been generated with the coccinelle script below and has been
hand modified to replace GFP_ with a correct flag.
It has been compile tested.

When memory is allocated in 'snd_solo_pcm_open()' (solo6x10-g723.c)
GFP_KERNEL can be used because this flag is already used jew a few lines
above.

When memory is allocated in 'solo_enc_alloc()' (solo6x10-v4l2-enc.c)
GFP_KERNEL can be used because this flag is already used jew a few lines
above.

When memory is allocated in 'solo_enc_v4l2_init()' (solo6x10-v4l2-enc.c)
GFP_KERNEL can be used because calls 'solo_enc_alloc()' which already uses
this flag.

@@
@@
-    PCI_DMA_BIDIRECTIONAL
+    DMA_BIDIRECTIONAL

@@
@@
-    PCI_DMA_TODEVICE
+    DMA_TO_DEVICE

@@
@@
-    PCI_DMA_FROMDEVICE
+    DMA_FROM_DEVICE

@@
@@
-    PCI_DMA_NONE
+    DMA_NONE

@@
expression e1, e2, e3;
@@
-    pci_alloc_consistent(e1, e2, e3)
+    dma_alloc_coherent(&e1->dev, e2, e3, GFP_)

@@
expression e1, e2, e3;
@@
-    pci_zalloc_consistent(e1, e2, e3)
+    dma_alloc_coherent(&e1->dev, e2, e3, GFP_)

@@
expression e1, e2, e3, e4;
@@
-    pci_free_consistent(e1, e2, e3, e4)
+    dma_free_coherent(&e1->dev, e2, e3, e4)

@@
expression e1, e2, e3, e4;
@@
-    pci_map_single(e1, e2, e3, e4)
+    dma_map_single(&e1->dev, e2, e3, e4)

@@
expression e1, e2, e3, e4;
@@
-    pci_unmap_single(e1, e2, e3, e4)
+    dma_unmap_single(&e1->dev, e2, e3, e4)

@@
expression e1, e2, e3, e4, e5;
@@
-    pci_map_page(e1, e2, e3, e4, e5)
+    dma_map_page(&e1->dev, e2, e3, e4, e5)

@@
expression e1, e2, e3, e4;
@@
-    pci_unmap_page(e1, e2, e3, e4)
+    dma_unmap_page(&e1->dev, e2, e3, e4)

@@
expression e1, e2, e3, e4;
@@
-    pci_map_sg(e1, e2, e3, e4)
+    dma_map_sg(&e1->dev, e2, e3, e4)

@@
expression e1, e2, e3, e4;
@@
-    pci_unmap_sg(e1, e2, e3, e4)
+    dma_unmap_sg(&e1->dev, e2, e3, e4)

@@
expression e1, e2, e3, e4;
@@
-    pci_dma_sync_single_for_cpu(e1, e2, e3, e4)
+    dma_sync_single_for_cpu(&e1->dev, e2, e3, e4)

@@
expression e1, e2, e3, e4;
@@
-    pci_dma_sync_single_for_device(e1, e2, e3, e4)
+    dma_sync_single_for_device(&e1->dev, e2, e3, e4)

@@
expression e1, e2, e3, e4;
@@
-    pci_dma_sync_sg_for_cpu(e1, e2, e3, e4)
+    dma_sync_sg_for_cpu(&e1->dev, e2, e3, e4)

@@
expression e1, e2, e3, e4;
@@
-    pci_dma_sync_sg_for_device(e1, e2, e3, e4)
+    dma_sync_sg_for_device(&e1->dev, e2, e3, e4)

@@
expression e1, e2;
@@
-    pci_dma_mapping_error(e1, e2)
+    dma_mapping_error(&e1->dev, e2)

@@
expression e1, e2;
@@
-    pci_set_dma_mask(e1, e2)
+    dma_set_mask(&e1->dev, e2)

@@
expression e1, e2;
@@
-    pci_set_consistent_dma_mask(e1, e2)
+    dma_set_coherent_mask(&e1->dev, e2)

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
---
If needed, see post from Christoph Hellwig on the kernel-janitors ML:
   https://marc.info/?l=kernel-janitors&m=158745678307186&w=4
---
 drivers/media/pci/solo6x10/solo6x10-g723.c    | 11 +++---
 drivers/media/pci/solo6x10/solo6x10-p2m.c     | 10 +++---
 .../media/pci/solo6x10/solo6x10-v4l2-enc.c    | 35 ++++++++++---------
 3 files changed, 29 insertions(+), 27 deletions(-)

diff --git a/drivers/media/pci/solo6x10/solo6x10-g723.c b/drivers/media/pci/solo6x10/solo6x10-g723.c
index d137b94869d8..6cebad665565 100644
--- a/drivers/media/pci/solo6x10/solo6x10-g723.c
+++ b/drivers/media/pci/solo6x10/solo6x10-g723.c
@@ -124,9 +124,10 @@ static int snd_solo_pcm_open(struct snd_pcm_substream *ss)
 	if (solo_pcm == NULL)
 		goto oom;
 
-	solo_pcm->g723_buf = pci_alloc_consistent(solo_dev->pdev,
-						  G723_PERIOD_BYTES,
-						  &solo_pcm->g723_dma);
+	solo_pcm->g723_buf = dma_alloc_coherent(&solo_dev->pdev->dev,
+						G723_PERIOD_BYTES,
+						&solo_pcm->g723_dma,
+						GFP_KERNEL);
 	if (solo_pcm->g723_buf == NULL)
 		goto oom;
 
@@ -148,8 +149,8 @@ static int snd_solo_pcm_close(struct snd_pcm_substream *ss)
 	struct solo_snd_pcm *solo_pcm = snd_pcm_substream_chip(ss);
 
 	snd_pcm_substream_chip(ss) = solo_pcm->solo_dev;
-	pci_free_consistent(solo_pcm->solo_dev->pdev, G723_PERIOD_BYTES,
-			    solo_pcm->g723_buf, solo_pcm->g723_dma);
+	dma_free_coherent(&solo_pcm->solo_dev->pdev->dev, G723_PERIOD_BYTES,
+			  solo_pcm->g723_buf, solo_pcm->g723_dma);
 	kfree(solo_pcm);
 
 	return 0;
diff --git a/drivers/media/pci/solo6x10/solo6x10-p2m.c b/drivers/media/pci/solo6x10/solo6x10-p2m.c
index db2afc6a5fcb..ca70a864a3ef 100644
--- a/drivers/media/pci/solo6x10/solo6x10-p2m.c
+++ b/drivers/media/pci/solo6x10/solo6x10-p2m.c
@@ -37,16 +37,16 @@ int solo_p2m_dma(struct solo_dev *solo_dev, int wr,
 	if (WARN_ON_ONCE(!size))
 		return -EINVAL;
 
-	dma_addr = pci_map_single(solo_dev->pdev, sys_addr, size,
-				  wr ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE);
-	if (pci_dma_mapping_error(solo_dev->pdev, dma_addr))
+	dma_addr = dma_map_single(&solo_dev->pdev->dev, sys_addr, size,
+				  wr ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
+	if (dma_mapping_error(&solo_dev->pdev->dev, dma_addr))
 		return -ENOMEM;
 
 	ret = solo_p2m_dma_t(solo_dev, wr, dma_addr, ext_addr, size,
 			     repeat, ext_size);
 
-	pci_unmap_single(solo_dev->pdev, dma_addr, size,
-			 wr ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE);
+	dma_unmap_single(&solo_dev->pdev->dev, dma_addr, size,
+			 wr ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
 
 	return ret;
 }
diff --git a/drivers/media/pci/solo6x10/solo6x10-v4l2-enc.c b/drivers/media/pci/solo6x10/solo6x10-v4l2-enc.c
index 3cf7bd6186aa..0abcad4e84fa 100644
--- a/drivers/media/pci/solo6x10/solo6x10-v4l2-enc.c
+++ b/drivers/media/pci/solo6x10/solo6x10-v4l2-enc.c
@@ -1286,10 +1286,11 @@ static struct solo_enc_dev *solo_enc_alloc(struct solo_dev *solo_dev,
 	memcpy(solo_enc->jpeg_header, jpeg_header, solo_enc->jpeg_len);
 
 	solo_enc->desc_nelts = 32;
-	solo_enc->desc_items = pci_alloc_consistent(solo_dev->pdev,
-				      sizeof(struct solo_p2m_desc) *
-				      solo_enc->desc_nelts,
-				      &solo_enc->desc_dma);
+	solo_enc->desc_items = dma_alloc_coherent(&solo_dev->pdev->dev,
+						  sizeof(struct solo_p2m_desc) *
+						  solo_enc->desc_nelts,
+						  &solo_enc->desc_dma,
+						  GFP_KERNEL);
 	ret = -ENOMEM;
 	if (solo_enc->desc_items == NULL)
 		goto hdl_free;
@@ -1317,9 +1318,9 @@ static struct solo_enc_dev *solo_enc_alloc(struct solo_dev *solo_dev,
 vdev_release:
 	video_device_release(solo_enc->vfd);
 pci_free:
-	pci_free_consistent(solo_enc->solo_dev->pdev,
-			sizeof(struct solo_p2m_desc) * solo_enc->desc_nelts,
-			solo_enc->desc_items, solo_enc->desc_dma);
+	dma_free_coherent(&solo_enc->solo_dev->pdev->dev,
+			  sizeof(struct solo_p2m_desc) * solo_enc->desc_nelts,
+			  solo_enc->desc_items, solo_enc->desc_dma);
 hdl_free:
 	v4l2_ctrl_handler_free(hdl);
 	kfree(solo_enc);
@@ -1331,9 +1332,9 @@ static void solo_enc_free(struct solo_enc_dev *solo_enc)
 	if (solo_enc == NULL)
 		return;
 
-	pci_free_consistent(solo_enc->solo_dev->pdev,
-			sizeof(struct solo_p2m_desc) * solo_enc->desc_nelts,
-			solo_enc->desc_items, solo_enc->desc_dma);
+	dma_free_coherent(&solo_enc->solo_dev->pdev->dev,
+			  sizeof(struct solo_p2m_desc) * solo_enc->desc_nelts,
+			  solo_enc->desc_items, solo_enc->desc_dma);
 	video_unregister_device(solo_enc->vfd);
 	v4l2_ctrl_handler_free(&solo_enc->hdl);
 	kfree(solo_enc);
@@ -1346,9 +1347,9 @@ int solo_enc_v4l2_init(struct solo_dev *solo_dev, unsigned nr)
 	init_waitqueue_head(&solo_dev->ring_thread_wait);
 
 	solo_dev->vh_size = sizeof(vop_header);
-	solo_dev->vh_buf = pci_alloc_consistent(solo_dev->pdev,
-						solo_dev->vh_size,
-						&solo_dev->vh_dma);
+	solo_dev->vh_buf = dma_alloc_coherent(&solo_dev->pdev->dev,
+					      solo_dev->vh_size,
+					      &solo_dev->vh_dma, GFP_KERNEL);
 	if (solo_dev->vh_buf == NULL)
 		return -ENOMEM;
 
@@ -1363,8 +1364,8 @@ int solo_enc_v4l2_init(struct solo_dev *solo_dev, unsigned nr)
 
 		while (i--)
 			solo_enc_free(solo_dev->v4l2_enc[i]);
-		pci_free_consistent(solo_dev->pdev, solo_dev->vh_size,
-				    solo_dev->vh_buf, solo_dev->vh_dma);
+		dma_free_coherent(&solo_dev->pdev->dev, solo_dev->vh_size,
+				  solo_dev->vh_buf, solo_dev->vh_dma);
 		solo_dev->vh_buf = NULL;
 		return ret;
 	}
@@ -1391,6 +1392,6 @@ void solo_enc_v4l2_exit(struct solo_dev *solo_dev)
 		solo_enc_free(solo_dev->v4l2_enc[i]);
 
 	if (solo_dev->vh_buf)
-		pci_free_consistent(solo_dev->pdev, solo_dev->vh_size,
-			    solo_dev->vh_buf, solo_dev->vh_dma);
+		dma_free_coherent(&solo_dev->pdev->dev, solo_dev->vh_size,
+				  solo_dev->vh_buf, solo_dev->vh_dma);
 }
-- 
2.27.0