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
9bool 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
14void 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

source code of linux/drivers/scsi/qedf/drv_scsi_fw_funcs.c