mirror of https://gitee.com/openkylin/linux.git
45 lines
1.6 KiB
C
45 lines
1.6 KiB
C
/* QLogic FCoE Offload Driver
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* Copyright (c) 2016 Cavium Inc.
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*
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* This software is available under the terms of the GNU General Public License
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* (GPL) Version 2, available from the file COPYING in the main directory of
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* this source tree.
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*/
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#include "drv_scsi_fw_funcs.h"
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#define SCSI_NUM_SGES_IN_CACHE 0x4
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bool scsi_is_slow_sgl(u16 num_sges, bool small_mid_sge)
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{
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return (num_sges > SCSI_NUM_SGES_SLOW_SGL_THR && small_mid_sge);
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}
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void init_scsi_sgl_context(struct scsi_sgl_params *ctx_sgl_params,
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struct scsi_cached_sges *ctx_data_desc,
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struct scsi_sgl_task_params *sgl_task_params)
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{
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/* no need to check for sgl_task_params->sgl validity */
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u8 num_sges_to_init = sgl_task_params->num_sges >
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SCSI_NUM_SGES_IN_CACHE ? SCSI_NUM_SGES_IN_CACHE :
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sgl_task_params->num_sges;
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u8 sge_index;
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u32 val;
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val = cpu_to_le32(sgl_task_params->sgl_phys_addr.lo);
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ctx_sgl_params->sgl_addr.lo = val;
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val = cpu_to_le32(sgl_task_params->sgl_phys_addr.hi);
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ctx_sgl_params->sgl_addr.hi = val;
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val = cpu_to_le32(sgl_task_params->total_buffer_size);
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ctx_sgl_params->sgl_total_length = val;
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ctx_sgl_params->sgl_num_sges = cpu_to_le16(sgl_task_params->num_sges);
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for (sge_index = 0; sge_index < num_sges_to_init; sge_index++) {
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val = cpu_to_le32(sgl_task_params->sgl[sge_index].sge_addr.lo);
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ctx_data_desc->sge[sge_index].sge_addr.lo = val;
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val = cpu_to_le32(sgl_task_params->sgl[sge_index].sge_addr.hi);
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ctx_data_desc->sge[sge_index].sge_addr.hi = val;
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val = cpu_to_le32(sgl_task_params->sgl[sge_index].sge_len);
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ctx_data_desc->sge[sge_index].sge_len = val;
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}
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}
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