1 /* QLogic FCoE Offload Driver 2 * Copyright (c) 2016-2017 Cavium Inc. 3 * 4 * This software is available under the terms of the GNU General Public License 5 * (GPL) Version 2, available from the file COPYING in the main directory of 6 * this source tree. 7 */ 8 #include "drv_scsi_fw_funcs.h" 9 10 #define SCSI_NUM_SGES_IN_CACHE 0x4 11 12 bool scsi_is_slow_sgl(u16 num_sges, bool small_mid_sge) 13 { 14 return (num_sges > SCSI_NUM_SGES_SLOW_SGL_THR && small_mid_sge); 15 } 16 17 void init_scsi_sgl_context(struct scsi_sgl_params *ctx_sgl_params, 18 struct scsi_cached_sges *ctx_data_desc, 19 struct scsi_sgl_task_params *sgl_task_params) 20 { 21 /* no need to check for sgl_task_params->sgl validity */ 22 u8 num_sges_to_init = sgl_task_params->num_sges > 23 SCSI_NUM_SGES_IN_CACHE ? SCSI_NUM_SGES_IN_CACHE : 24 sgl_task_params->num_sges; 25 u8 sge_index; 26 u32 val; 27 28 val = cpu_to_le32(sgl_task_params->sgl_phys_addr.lo); 29 ctx_sgl_params->sgl_addr.lo = val; 30 val = cpu_to_le32(sgl_task_params->sgl_phys_addr.hi); 31 ctx_sgl_params->sgl_addr.hi = val; 32 val = cpu_to_le32(sgl_task_params->total_buffer_size); 33 ctx_sgl_params->sgl_total_length = val; 34 ctx_sgl_params->sgl_num_sges = cpu_to_le16(sgl_task_params->num_sges); 35 36 for (sge_index = 0; sge_index < num_sges_to_init; sge_index++) { 37 val = cpu_to_le32(sgl_task_params->sgl[sge_index].sge_addr.lo); 38 ctx_data_desc->sge[sge_index].sge_addr.lo = val; 39 val = cpu_to_le32(sgl_task_params->sgl[sge_index].sge_addr.hi); 40 ctx_data_desc->sge[sge_index].sge_addr.hi = val; 41 val = cpu_to_le32(sgl_task_params->sgl[sge_index].sge_len); 42 ctx_data_desc->sge[sge_index].sge_len = val; 43 } 44 } 45