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Index: sys/compat/linuxkpi/common/include/linux/dma-mapping.h
===================================================================
--- sys/compat/linuxkpi/common/include/linux/dma-mapping.h
+++ sys/compat/linuxkpi/common/include/linux/dma-mapping.h
@@ -103,6 +103,7 @@
void linux_dma_unmap_sg_attrs(struct device *dev, struct scatterlist *sg,
int nents __unused, enum dma_data_direction dir __unused,
unsigned long attrs __unused);
+void linuxkpi_dma_sync(struct device *, dma_addr_t, size_t, bus_dmasync_op_t);
static inline int
dma_supported(struct device *dev, u64 dma_mask)
@@ -208,6 +209,25 @@
dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size,
enum dma_data_direction direction)
{
+ bus_dmasync_op_t op;
+
+ switch (direction) {
+ case DMA_BIDIRECTIONAL:
+ op = BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE;
+ linuxkpi_dma_sync(dev, dma_handle, size, op);
+ op = BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE;
+ break;
+ case DMA_TO_DEVICE:
+ op = BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE;
+ break;
+ case DMA_FROM_DEVICE:
+ op = BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE;
+ break;
+ default:
+ return;
+ }
+
+ linuxkpi_dma_sync(dev, dma_handle, size, op);
}
static inline void
@@ -221,6 +241,25 @@
dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle,
size_t size, enum dma_data_direction direction)
{
+ bus_dmasync_op_t op;
+
+ switch (direction) {
+ case DMA_BIDIRECTIONAL:
+ op = BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE;
+ linuxkpi_dma_sync(dev, dma_handle, size, op);
+ op = BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE;
+ break;
+ case DMA_TO_DEVICE:
+ op = BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE;
+ break;
+ case DMA_FROM_DEVICE:
+ op = BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE;
+ break;
+ default:
+ return;
+ }
+
+ linuxkpi_dma_sync(dev, dma_handle, size, op);
}
static inline void
Index: sys/compat/linuxkpi/common/src/linux_pci.c
===================================================================
--- sys/compat/linuxkpi/common/src/linux_pci.c
+++ sys/compat/linuxkpi/common/src/linux_pci.c
@@ -935,6 +935,29 @@
return (mem);
}
+void
+linuxkpi_dma_sync(struct device *dev, dma_addr_t dma_addr, size_t size,
+ bus_dmasync_op_t op)
+{
+ struct linux_dma_priv *priv;
+ struct linux_dma_obj *obj;
+
+ priv = dev->dma_priv;
+
+ if (pctrie_is_empty(&priv->ptree))
+ return;
+
+ DMA_PRIV_LOCK(priv);
+ obj = LINUX_DMA_PCTRIE_LOOKUP(&priv->ptree, dma_addr);
+ if (obj == NULL) {
+ DMA_PRIV_UNLOCK(priv);
+ return;
+ }
+
+ bus_dmamap_sync(obj->dmat, obj->dmamap, op);
+ DMA_PRIV_UNLOCK(priv);
+}
+
int
linux_dma_map_sg_attrs(struct device *dev, struct scatterlist *sgl, int nents,
enum dma_data_direction dir __unused, unsigned long attrs __unused)

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