Change Details

Don't assume that csio->data_ptr is pointer to a data buffer that can be passed to icl_get_pdu_data and icl_append_data. For unmapped I/O requests, use pmap_map_io_transient to map individual pages to obtain a pointer to pass down to icl_get_pdu_data and icl_append_data. Sponsored by: Chelsio Communications

Don't assume that csio->data_ptr is pointer to a data buffer that can be passed to icl_get_pdu_data and icl_append_data. For unmapped I/O requests, csio->data_ptr is instead a pointer to a struct bio as indicated by CAM_DATA_BIO. To support these requests, add icl_pdu_append_bio and icl_pdu_get_bio methods which pass a pointer to the bio and an offset and length relative to the bio's buffer. Note that only backends supporting unmapped requests need to implement these hooks. Implement simple no-op hooks for the iser backend. Sponsored by: Chelsio Communications

Don't assume that csio->data_ptr is pointer to a data buffer that can be passed to icl_get_pdu_data and icl_append_data. For unmapped I/O requests, use pmap_map_io_transient to map individual pages to obtaincsio->data_ptr is instead a pointer to a struct bio as a pointer to pass down to icl_get_pdu_data and icl_append_dataindicated by CAM_DATA_BIO. To support these requests, add icl_pdu_append_bio and icl_pdu_get_bio methods which pass a pointer to the bio and an offset and length relative to the bio's buffer. Note that only backends supporting unmapped requests need to implement these hooks. Implement simple no-op hooks for the iser backend. Sponsored by: Chelsio Communications