From d69d8adc5bf045e686338918292aa417c5282852 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Tue, 18 Aug 2020 16:38:25 +0200 Subject: [PATCH] 53c700: convert to dma_alloc_noncoherent Use the new non-coherent DMA API including proper ownership transfers. Signed-off-by: Christoph Hellwig Tested-by: Thomas Bogendoerfer --- drivers/scsi/53c700.c | 20 ++++++++++++++------ 1 file changed, 14 insertions(+), 6 deletions(-) diff --git a/drivers/scsi/53c700.c b/drivers/scsi/53c700.c index c59226d..5117d90 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); -- 2.7.4