xref: /linux/drivers/scsi/qedf/drv_scsi_fw_funcs.c (revision 75bf465f0bc33e9b776a46d6a1b9b990f5fb7c37)
1*3287e96aSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only
2be086e7cSMintz, Yuval /* QLogic FCoE Offload Driver
35d1c8b5bSChad Dupuis  * Copyright (c) 2016-2018 Cavium Inc.
4be086e7cSMintz, Yuval  */
5be086e7cSMintz, Yuval #include "drv_scsi_fw_funcs.h"
6be086e7cSMintz, Yuval 
7be086e7cSMintz, Yuval #define SCSI_NUM_SGES_IN_CACHE 0x4
8be086e7cSMintz, Yuval 
9be086e7cSMintz, Yuval bool scsi_is_slow_sgl(u16 num_sges, bool small_mid_sge)
10be086e7cSMintz, Yuval {
11be086e7cSMintz, Yuval 	return (num_sges > SCSI_NUM_SGES_SLOW_SGL_THR && small_mid_sge);
12be086e7cSMintz, Yuval }
13be086e7cSMintz, Yuval 
14be086e7cSMintz, Yuval void init_scsi_sgl_context(struct scsi_sgl_params *ctx_sgl_params,
15be086e7cSMintz, Yuval 			   struct scsi_cached_sges *ctx_data_desc,
16be086e7cSMintz, Yuval 			   struct scsi_sgl_task_params *sgl_task_params)
17be086e7cSMintz, Yuval {
18be086e7cSMintz, Yuval 	/* no need to check for sgl_task_params->sgl validity */
19be086e7cSMintz, Yuval 	u8 num_sges_to_init = sgl_task_params->num_sges >
20be086e7cSMintz, Yuval 			      SCSI_NUM_SGES_IN_CACHE ? SCSI_NUM_SGES_IN_CACHE :
21be086e7cSMintz, Yuval 			      sgl_task_params->num_sges;
22be086e7cSMintz, Yuval 	u8 sge_index;
23be086e7cSMintz, Yuval 	u32 val;
24be086e7cSMintz, Yuval 
25be086e7cSMintz, Yuval 	val = cpu_to_le32(sgl_task_params->sgl_phys_addr.lo);
26be086e7cSMintz, Yuval 	ctx_sgl_params->sgl_addr.lo = val;
27be086e7cSMintz, Yuval 	val = cpu_to_le32(sgl_task_params->sgl_phys_addr.hi);
28be086e7cSMintz, Yuval 	ctx_sgl_params->sgl_addr.hi = val;
29be086e7cSMintz, Yuval 	val = cpu_to_le32(sgl_task_params->total_buffer_size);
30be086e7cSMintz, Yuval 	ctx_sgl_params->sgl_total_length = val;
31be086e7cSMintz, Yuval 	ctx_sgl_params->sgl_num_sges = cpu_to_le16(sgl_task_params->num_sges);
32be086e7cSMintz, Yuval 
33be086e7cSMintz, Yuval 	for (sge_index = 0; sge_index < num_sges_to_init; sge_index++) {
34be086e7cSMintz, Yuval 		val = cpu_to_le32(sgl_task_params->sgl[sge_index].sge_addr.lo);
35be086e7cSMintz, Yuval 		ctx_data_desc->sge[sge_index].sge_addr.lo = val;
36be086e7cSMintz, Yuval 		val = cpu_to_le32(sgl_task_params->sgl[sge_index].sge_addr.hi);
37be086e7cSMintz, Yuval 		ctx_data_desc->sge[sge_index].sge_addr.hi = val;
38be086e7cSMintz, Yuval 		val = cpu_to_le32(sgl_task_params->sgl[sge_index].sge_len);
39be086e7cSMintz, Yuval 		ctx_data_desc->sge[sge_index].sge_len = val;
40be086e7cSMintz, Yuval 	}
41be086e7cSMintz, Yuval }
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