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 
scsi_is_slow_sgl(u16 num_sges,bool small_mid_sge)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 
init_scsi_sgl_context(struct scsi_sgl_params * ctx_sgl_params,struct scsi_cached_sges * ctx_data_desc,struct scsi_sgl_task_params * sgl_task_params)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