1/* QLogic FCoE Offload Driver
2 * Copyright (c) 2016-2018 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
12bool 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
17void 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