diff options
Diffstat (limited to 'drivers/misc/habanalabs/common/device.c')
| -rw-r--r-- | drivers/misc/habanalabs/common/device.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/drivers/misc/habanalabs/common/device.c b/drivers/misc/habanalabs/common/device.c index 48654dfcd7b6..9bca855b4649 100644 --- a/drivers/misc/habanalabs/common/device.c +++ b/drivers/misc/habanalabs/common/device.c @@ -80,6 +80,38 @@ static int hl_access_sram_dram_region(struct hl_device *hdev, u64 addr, u64 *val return 0; } +int hl_dma_map_sgtable(struct hl_device *hdev, struct sg_table *sgt, enum dma_data_direction dir) +{ + struct asic_fixed_properties *prop = &hdev->asic_prop; + struct scatterlist *sg; + int rc, i; + + rc = dma_map_sgtable(&hdev->pdev->dev, sgt, dir, 0); + if (rc) + return rc; + + /* Shift to the device's base physical address of host memory if necessary */ + if (prop->device_dma_offset_for_host_access) + for_each_sgtable_dma_sg(sgt, sg, i) + sg->dma_address += prop->device_dma_offset_for_host_access; + + return 0; +} + +void hl_dma_unmap_sgtable(struct hl_device *hdev, struct sg_table *sgt, enum dma_data_direction dir) +{ + struct asic_fixed_properties *prop = &hdev->asic_prop; + struct scatterlist *sg; + int i; + + /* Cancel the device's base physical address of host memory if necessary */ + if (prop->device_dma_offset_for_host_access) + for_each_sgtable_dma_sg(sgt, sg, i) + sg->dma_address -= prop->device_dma_offset_for_host_access; + + dma_unmap_sgtable(&hdev->pdev->dev, sgt, dir, 0); +} + /* * hl_access_cfg_region - access the config region * |