[PATCH 12/17] 53c700: convert to dma_alloc_noncoherent

Christoph Hellwig
2020-09-14T16:43:22Z

Use the new non-coherent DMA API including proper ownership transfers.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
drivers/scsi/53c700.c | 11 +++++++++--
drivers/scsi/53c700.h | 16 ++++++++--------
2 files changed, 17 insertions(+), 10 deletions(-)

diff --git a/drivers/scsi/53c700.c b/drivers/scsi/53c700.c
index 9a343f8ecb6c3e..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 *
diff --git a/drivers/scsi/53c700.h b/drivers/scsi/53c700.h
index 0f545b05fe611d..c9f8c497babb3d 100644
--- a/drivers/scsi/53c700.h
+++ b/drivers/scsi/53c700.h
@@ -423,33 +423,33 @@ struct NCR_700_Host_Parameters {
#define NCR_710_MIN_XFERP 0
#define NCR_700_MIN_PERIOD 25 /* for SDTR message, 100ns */

-#define script_patch_32(dev, script, symbol, value) \
+#define script_patch_32(h, script, symbol, value) \
{ \
int i; \
dma_addr_t da = value; \
for(i=0; i< (sizeof(A_##symbol##_used) / sizeof(__u32)); i++) { \
__u32 val = bS_to_cpu((script)[A_##symbol##_used[i]]) + da; \
(script)[A_##symbol##_used[i]] = bS_to_host(val); \
- dma_sync_to_dev((dev), &(script)[A_##symbol##_used[i]], 4); \
+ dma_sync_to_dev((h), &(script)[A_##symbol##_used[i]], 4); \
DEBUG((" script, patching %s at %d to %pad\n", \
#symbol, A_##symbol##_used[i], &da)); \
} \
}

-#define script_patch_32_abs(dev, script, symbol, value) \
+#define script_patch_32_abs(h, script, symbol, value) \
{ \
int i; \
dma_addr_t da = value; \
for(i=0; i< (sizeof(A_##symbol##_used) / sizeof(__u32)); i++) { \
(script)[A_##symbol##_used[i]] = bS_to_host(da); \
- dma_sync_to_dev((dev), &(script)[A_##symbol##_used[i]], 4); \
+ dma_sync_to_dev((h), &(script)[A_##symbol##_used[i]], 4); \
DEBUG((" script, patching %s at %d to %pad\n", \
#symbol, A_##symbol##_used[i], &da)); \
} \
}

/* Used for patching the SCSI ID in the SELECT instruction */
-#define script_patch_ID(dev, script, symbol, value) \
+#define script_patch_ID(h, script, symbol, value) \
{ \
int i; \
for(i=0; i< (sizeof(A_##symbol##_used) / sizeof(__u32)); i++) { \
@@ -457,13 +457,13 @@ struct NCR_700_Host_Parameters {
val &= 0xff00ffff; \
val |= ((value) & 0xff) << 16; \
(script)[A_##symbol##_used[i]] = bS_to_host(val); \
- dma_sync_to_dev((dev), &(script)[A_##symbol##_used[i]], 4); \
+ dma_sync_to_dev((h), &(script)[A_##symbol##_used[i]], 4); \
DEBUG((" script, patching ID field %s at %d to 0x%x\n", \
#symbol, A_##symbol##_used[i], val)); \
} \
}

-#define script_patch_16(dev, script, symbol, value) \
+#define script_patch_16(h, script, symbol, value) \
{ \
int i; \
for(i=0; i< (sizeof(A_##symbol##_used) / sizeof(__u32)); i++) { \
@@ -471,7 +471,7 @@ struct NCR_700_Host_Parameters {
val &= 0xffff0000; \
val |= ((value) & 0xffff); \
(script)[A_##symbol##_used[i]] = bS_to_host(val); \
- dma_sync_to_dev((dev), &(script)[A_##symbol##_used[i]], 4); \
+ dma_sync_to_dev((h), &(script)[A_##symbol##_used[i]], 4); \
DEBUG((" script, patching short field %s at %d to 0x%x\n", \
#symbol, A_##symbol##_used[i], val)); \
} \
--
2.28.0