Name
i2o_dma_map_sg —
Map a SG List to controller and fill in I2O message.
Synopsis
int i2o_dma_map_sg ( | struct i2o_controller * | c, |
| | struct scatterlist * | sg, |
| | int | sg_count, |
| | enum dma_data_direction | direction, |
| | u32 ** | sg_ptr); |
Arguments
c
I2O controller
sg
SG list to be mapped
sg_count
number of elements in the SG list
direction
DMA_TO_DEVICE / DMA_FROM_DEVICE
sg_ptr
pointer to the SG list inside the I2O message
Description
This function does all necessary DMA handling and also writes the I2O
SGL elements into the I2O message. For details on DMA handling see also
dma_map_sg. The pointer sg_ptr will only be set to the end of the SG
list if the allocation was successful.
Returns 0 on failure or 1 on success.