From: Leon Romanovsky <leonro@nvidia.com>
MIPS jazz uses physical addresses for mapping pages, so convert
it to get them directly from DMA mapping routine.
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
---
arch/mips/jazz/jazzdma.c | 20 +++++++++++++-------
1 file changed, 13 insertions(+), 7 deletions(-)
diff --git a/arch/mips/jazz/jazzdma.c b/arch/mips/jazz/jazzdma.c
index c97b089b9902..45fe71aa454b 100644
--- a/arch/mips/jazz/jazzdma.c
+++ b/arch/mips/jazz/jazzdma.c
@@ -521,18 +521,24 @@ static void jazz_dma_free(struct device *dev, size_t size, void *vaddr,
__free_pages(virt_to_page(vaddr), get_order(size));
}
-static dma_addr_t jazz_dma_map_page(struct device *dev, struct page *page,
- unsigned long offset, size_t size, enum dma_data_direction dir,
- unsigned long attrs)
+static dma_addr_t jazz_dma_map_phys(struct device *dev, phys_addr_t phys,
+ size_t size, enum dma_data_direction dir, unsigned long attrs)
{
- phys_addr_t phys = page_to_phys(page) + offset;
+ if (attrs & DMA_ATTR_MMIO)
+ /*
+ * This check is included because older versions of the code lacked
+ * MMIO path support, and my ability to test this path is limited.
+ * However, from a software technical standpoint, there is no restriction,
+ * as the following code operates solely on physical addresses.
+ */
+ return DMA_MAPPING_ERROR;
if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC))
arch_sync_dma_for_device(phys, size, dir);
return vdma_alloc(phys, size);
}
-static void jazz_dma_unmap_page(struct device *dev, dma_addr_t dma_addr,
+static void jazz_dma_unmap_phys(struct device *dev, dma_addr_t dma_addr,
size_t size, enum dma_data_direction dir, unsigned long attrs)
{
if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC))
@@ -607,8 +613,8 @@ static void jazz_dma_sync_sg_for_cpu(struct device *dev,
const struct dma_map_ops jazz_dma_ops = {
.alloc = jazz_dma_alloc,
.free = jazz_dma_free,
- .map_page = jazz_dma_map_page,
- .unmap_page = jazz_dma_unmap_page,
+ .map_phys = jazz_dma_map_phys,
+ .unmap_phys = jazz_dma_unmap_phys,
.map_sg = jazz_dma_map_sg,
.unmap_sg = jazz_dma_unmap_sg,
.sync_single_for_cpu = jazz_dma_sync_single_for_cpu,
--
2.51.0