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Date: Sun, 13 Sep 2020 16:57:16 +0200
From: Christophe JAILLET <christophe.jaillet@...adoo.fr>
To: mchehab@...nel.org, romain.perier@...il.com,
hverkuil-cisco@...all.nl, allen.lkml@...il.com
Cc: linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
kernel-janitors@...r.kernel.org,
Christophe JAILLET <christophe.jaillet@...adoo.fr>
Subject: [PATCH] media: mantis: switch from 'pci_' to 'dma_' API
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 'mantis_alloc_buffers()' (mantis_dma.c)
GFP_KERNEL can be used because it is called from 'mantis_dma_init()' which
is only called from probe functions and no lock is taken in the between.
@@
@@
- 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@...adoo.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/mantis/mantis_dma.c | 20 ++++++++++----------
drivers/media/pci/mantis/mantis_pci.c | 2 +-
2 files changed, 11 insertions(+), 11 deletions(-)
diff --git a/drivers/media/pci/mantis/mantis_dma.c b/drivers/media/pci/mantis/mantis_dma.c
index 4df571ff272b..80c843936493 100644
--- a/drivers/media/pci/mantis/mantis_dma.c
+++ b/drivers/media/pci/mantis/mantis_dma.c
@@ -52,8 +52,8 @@ int mantis_dma_exit(struct mantis_pci *mantis)
mantis->buf_cpu,
MANTIS_BUF_SIZE);
- pci_free_consistent(mantis->pdev, MANTIS_BUF_SIZE,
- mantis->buf_cpu, mantis->buf_dma);
+ dma_free_coherent(&mantis->pdev->dev, MANTIS_BUF_SIZE,
+ mantis->buf_cpu, mantis->buf_dma);
mantis->buf_cpu = NULL;
}
@@ -64,8 +64,8 @@ int mantis_dma_exit(struct mantis_pci *mantis)
mantis->risc_cpu,
MANTIS_RISC_SIZE);
- pci_free_consistent(mantis->pdev, MANTIS_RISC_SIZE,
- mantis->risc_cpu, mantis->risc_dma);
+ dma_free_coherent(&mantis->pdev->dev, MANTIS_RISC_SIZE,
+ mantis->risc_cpu, mantis->risc_dma);
mantis->risc_cpu = NULL;
}
@@ -77,9 +77,9 @@ EXPORT_SYMBOL_GPL(mantis_dma_exit);
static inline int mantis_alloc_buffers(struct mantis_pci *mantis)
{
if (!mantis->buf_cpu) {
- mantis->buf_cpu = pci_alloc_consistent(mantis->pdev,
- MANTIS_BUF_SIZE,
- &mantis->buf_dma);
+ mantis->buf_cpu = dma_alloc_coherent(&mantis->pdev->dev,
+ MANTIS_BUF_SIZE,
+ &mantis->buf_dma, GFP_KERNEL);
if (!mantis->buf_cpu) {
dprintk(MANTIS_ERROR, 1,
"DMA buffer allocation failed");
@@ -92,9 +92,9 @@ static inline int mantis_alloc_buffers(struct mantis_pci *mantis)
mantis->buf_cpu, MANTIS_BUF_SIZE);
}
if (!mantis->risc_cpu) {
- mantis->risc_cpu = pci_alloc_consistent(mantis->pdev,
- MANTIS_RISC_SIZE,
- &mantis->risc_dma);
+ mantis->risc_cpu = dma_alloc_coherent(&mantis->pdev->dev,
+ MANTIS_RISC_SIZE,
+ &mantis->risc_dma, GFP_KERNEL);
if (!mantis->risc_cpu) {
dprintk(MANTIS_ERROR, 1,
diff --git a/drivers/media/pci/mantis/mantis_pci.c b/drivers/media/pci/mantis/mantis_pci.c
index 3bfb3e99c93a..9fbce74b00c8 100644
--- a/drivers/media/pci/mantis/mantis_pci.c
+++ b/drivers/media/pci/mantis/mantis_pci.c
@@ -55,7 +55,7 @@ int mantis_pci_init(struct mantis_pci *mantis)
goto fail0;
}
- err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
+ err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
if (err != 0) {
dprintk(MANTIS_ERROR, 1, "ERROR: Unable to obtain 32 bit DMA <%i>", err);
ret = -ENOMEM;
--
2.25.1
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