1 // SPDX-License-Identifier: GPL-2.0-only 2 /* QLogic FCoE Offload Driver 3 * Copyright (c) 2016-2018 Cavium Inc. 4 */ 5 #include "drv_scsi_fw_funcs.h" 6 7 #define SCSI_NUM_SGES_IN_CACHE 0x4 8 9 bool scsi_is_slow_sgl(u16 num_sges, bool small_mid_sge) 10 { 11 return (num_sges > SCSI_NUM_SGES_SLOW_SGL_THR && small_mid_sge); 12 } 13 14 void init_scsi_sgl_context(struct scsi_sgl_params *ctx_sgl_params, 15 struct scsi_cached_sges *ctx_data_desc, 16 struct scsi_sgl_task_params *sgl_task_params) 17 { 18 /* no need to check for sgl_task_params->sgl validity */ 19 u8 num_sges_to_init = sgl_task_params->num_sges > 20 SCSI_NUM_SGES_IN_CACHE ? SCSI_NUM_SGES_IN_CACHE : 21 sgl_task_params->num_sges; 22 u8 sge_index; 23 u32 val; 24 25 val = cpu_to_le32(sgl_task_params->sgl_phys_addr.lo); 26 ctx_sgl_params->sgl_addr.lo = val; 27 val = cpu_to_le32(sgl_task_params->sgl_phys_addr.hi); 28 ctx_sgl_params->sgl_addr.hi = val; 29 val = cpu_to_le32(sgl_task_params->total_buffer_size); 30 ctx_sgl_params->sgl_total_length = val; 31 ctx_sgl_params->sgl_num_sges = cpu_to_le16(sgl_task_params->num_sges); 32 33 for (sge_index = 0; sge_index < num_sges_to_init; sge_index++) { 34 val = cpu_to_le32(sgl_task_params->sgl[sge_index].sge_addr.lo); 35 ctx_data_desc->sge[sge_index].sge_addr.lo = val; 36 val = cpu_to_le32(sgl_task_params->sgl[sge_index].sge_addr.hi); 37 ctx_data_desc->sge[sge_index].sge_addr.hi = val; 38 val = cpu_to_le32(sgl_task_params->sgl[sge_index].sge_len); 39 ctx_data_desc->sge[sge_index].sge_len = val; 40 } 41 } 42