diff mbox series

[13/18] 53c700: convert to dma_alloc_noncoherent

Message ID 20200915155122.1768241-14-hch@lst.de (mailing list archive)
State Awaiting Upstream
Headers show
Series [01/18] media/v4l2: remove V4L2-FLAG-MEMORY-NON-CONSISTENT flag | expand

Commit Message

Christoph Hellwig Sept. 15, 2020, 3:51 p.m. UTC 
Use the new non-coherent DMA API including proper ownership transfers.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 drivers/scsi/53c700.c | 20 ++++++++++++++------
 1 file changed, 14 insertions(+), 6 deletions(-)

Comments

Thomas Bogendoerfer Sept. 22, 2020, 8:51 a.m. UTC | #1 
On Tue, Sep 15, 2020 at 05:51:17PM +0200, Christoph Hellwig wrote:
> Use the new non-coherent DMA API including proper ownership transfers.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
>  drivers/scsi/53c700.c | 20 ++++++++++++++------
>  1 file changed, 14 insertions(+), 6 deletions(-)

Tested-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
diff mbox series

Patch

diff --git a/drivers/scsi/53c700.c b/drivers/scsi/53c700.c
index c59226d7e2f6b5..5117d90ccd9edf 100644
--- a/drivers/scsi/53c700.c
+++ b/drivers/scsi/53c700.c
@@ -269,18 +269,25 @@  NCR_700_get_SXFER(struct scsi_device *SDp)
 					      spi_period(SDp->sdev_target));
 }
 
+static inline dma_addr_t virt_to_dma(struct NCR_700_Host_Parameters *h, void *p)
+{
+	return h->pScript + ((uintptr_t)p - (uintptr_t)h->script);
+}
+
 static inline void dma_sync_to_dev(struct NCR_700_Host_Parameters *h,
 		void *addr, size_t size)
 {
 	if (h->noncoherent)
-		dma_cache_sync(h->dev, addr, size, DMA_TO_DEVICE);
+		dma_sync_single_for_device(h->dev, virt_to_dma(h, addr),
+					   size, DMA_BIDIRECTIONAL);
 }
 
 static inline void dma_sync_from_dev(struct NCR_700_Host_Parameters *h,
 		void *addr, size_t size)
 {
 	if (h->noncoherent)
-		dma_cache_sync(h->dev, addr, size, DMA_FROM_DEVICE);
+		dma_sync_single_for_device(h->dev, virt_to_dma(h, addr), size,
+					   DMA_BIDIRECTIONAL);
 }
 
 struct Scsi_Host *
@@ -300,8 +307,8 @@  NCR_700_detect(struct scsi_host_template *tpnt,
 	memory = dma_alloc_coherent(dev, TOTAL_MEM_SIZE, &pScript, GFP_KERNEL);
 	if (!memory) {
 		hostdata->noncoherent = 1;
-		memory = dma_alloc_attrs(dev, TOTAL_MEM_SIZE, &pScript,
-					 GFP_KERNEL, DMA_ATTR_NON_CONSISTENT);
+		memory = dma_alloc_noncoherent(dev, TOTAL_MEM_SIZE, &pScript,
+					 DMA_BIDIRECTIONAL, GFP_KERNEL);
 	}
 	if (!memory) {
 		printk(KERN_ERR "53c700: Failed to allocate memory for driver, detaching\n");
@@ -414,8 +421,9 @@  NCR_700_release(struct Scsi_Host *host)
 		(struct NCR_700_Host_Parameters *)host->hostdata[0];
 
 	if (hostdata->noncoherent)
-		dma_free_attrs(hostdata->dev, TOTAL_MEM_SIZE, hostdata->script,
-			       hostdata->pScript, DMA_ATTR_NON_CONSISTENT);
+		dma_free_noncoherent(hostdata->dev, TOTAL_MEM_SIZE,
+				hostdata->script, hostdata->pScript,
+				DMA_BIDIRECTIONAL);
 	else
 		dma_free_coherent(hostdata->dev, TOTAL_MEM_SIZE,
 				  hostdata->script, hostdata->pScript);