accel/habanalabs: remove unused asic functions

asic_dma_{un}map_single() asic-specific functions are no longer called
from the common code, so delete these functions.

In addition, delete the gaudi2 implementation as they are also not
called.

Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
Reviewed-by: Ofir Bitton <obitton@habana.ai>

Author: ogabbay

drivers/accel/habanalabs/common/habanalabs.h

@@ -1520,8 +1520,6 @@ struct engines_data {
  * @asic_dma_pool_free: free small DMA allocation from pool.
  * @cpu_accessible_dma_pool_alloc: allocate CPU PQ packet from DMA pool.
  * @cpu_accessible_dma_pool_free: free CPU PQ packet from DMA pool.
- * @asic_dma_unmap_single: unmap a single DMA buffer
- * @asic_dma_map_single: map a single buffer to a DMA
  * @hl_dma_unmap_sgtable: DMA unmap scatter-gather table.
  * @cs_parser: parse Command Submission.
  * @asic_dma_map_sgtable: DMA map scatter-gather table.
@@ -1645,12 +1643,6 @@ struct hl_asic_funcs {
 				size_t size, dma_addr_t *dma_handle);
 	void (*cpu_accessible_dma_pool_free)(struct hl_device *hdev,
 				size_t size, void *vaddr);
-	void (*asic_dma_unmap_single)(struct hl_device *hdev,
-				dma_addr_t dma_addr, int len,
-				enum dma_data_direction dir);
-	dma_addr_t (*asic_dma_map_single)(struct hl_device *hdev,
-				void *addr, int len,
-				enum dma_data_direction dir);
 	void (*hl_dma_unmap_sgtable)(struct hl_device *hdev,
 				struct sg_table *sgt,
 				enum dma_data_direction dir);

drivers/accel/habanalabs/gaudi2/gaudi2.c

@@ -6731,24 +6731,6 @@ static void gaudi2_cpu_accessible_dma_pool_free(struct hl_device *hdev, size_t s
 	hl_fw_cpu_accessible_dma_pool_free(hdev, size, vaddr);
 }
 
-static dma_addr_t gaudi2_dma_map_single(struct hl_device *hdev, void *addr, int len,
-					enum dma_data_direction dir)
-{
-	dma_addr_t dma_addr;
-
-	dma_addr = dma_map_single(&hdev->pdev->dev, addr, len, dir);
-	if (unlikely(dma_mapping_error(&hdev->pdev->dev, dma_addr)))
-		return 0;
-
-	return dma_addr;
-}
-
-static void gaudi2_dma_unmap_single(struct hl_device *hdev, dma_addr_t addr, int len,
-					enum dma_data_direction dir)
-{
-	dma_unmap_single(&hdev->pdev->dev, addr, len, dir);
-}
-
 static int gaudi2_validate_cb_address(struct hl_device *hdev, struct hl_cs_parser *parser)
 {
 	struct asic_fixed_properties *asic_prop = &hdev->asic_prop;
@@ -11515,8 +11497,6 @@ static const struct hl_asic_funcs gaudi2_funcs = {
 	.asic_dma_pool_free = gaudi2_dma_pool_free,
 	.cpu_accessible_dma_pool_alloc = gaudi2_cpu_accessible_dma_pool_alloc,
 	.cpu_accessible_dma_pool_free = gaudi2_cpu_accessible_dma_pool_free,
-	.asic_dma_unmap_single = gaudi2_dma_unmap_single,
-	.asic_dma_map_single = gaudi2_dma_map_single,
 	.hl_dma_unmap_sgtable = hl_dma_unmap_sgtable,
 	.cs_parser = gaudi2_cs_parser,
 	.asic_dma_map_sgtable = hl_dma_map_sgtable,