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| author |   Ohad Sharabi <osharabi@habana.ai> | 2022-03-24 16:34:49 +0200 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-05-22 21:01:18 +0200 |
| commit | ab4ea5872842766b0155b2517db61a4ae99d98e0 (patch) | |
| tree | 40c6c06043e36b7ed25b4afff96aaff28bf8cb53 /drivers/misc/habanalabs/common/device.c | |
| parent | habanalabs/gaudi: use lower_32_bits() for casting (diff) | |
| download | linux-dev-ab4ea5872842766b0155b2517db61a4ae99d98e0.tar.xz linux-dev-ab4ea5872842766b0155b2517db61a4ae99d98e0.zip | |
habanalabs: use for_each_sgtable_dma_sg for dma sgt
Instead of using for_each_sg when iterating sgt that contains dma
entries, use the more proper for_each_sgtable_dma_sg macro.
In addition, both Goya and Gaudi have the exact same implementation
of the asic function that encapsulate the usage of this macro, so
it is better to move that implementation to the common code.
Signed-off-by: Ohad Sharabi <osharabi@habana.ai>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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 * |