drivers/scsi/qedf/drv_scsi_fw_funcs.h

   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 #ifndef _SCSI_FW_FUNCS_H
   9 #define _SCSI_FW_FUNCS_H
  10 #include <linux/qed/common_hsi.h>
  11 #include <linux/qed/storage_common.h>
  12 #include <linux/qed/fcoe_common.h>
  13
  14 struct scsi_sgl_task_params {
  15         struct scsi_sge *sgl;
  16         struct regpair sgl_phys_addr;
  17         u32 total_buffer_size;
  18         u16 num_sges;
  19
  20          /* true if SGL contains a small (< 4KB) SGE in middle(not 1st or last)
  21           * -> relevant for tx only
  22           */
  23         bool small_mid_sge;
  24 };
  25
  26 struct scsi_dif_task_params {
  27         u32 initial_ref_tag;
  28         bool initial_ref_tag_is_valid;
  29         u16 application_tag;
  30         u16 application_tag_mask;
  31         u16 dif_block_size_log;
  32         bool dif_on_network;
  33         bool dif_on_host;
  34         u8 host_guard_type;
  35         u8 protection_type;
  36         u8 ref_tag_mask;
  37         bool crc_seed;
  38
  39          /* Enable Connection error upon DIF error (segments with DIF errors are
  40           * dropped)
  41           */
  42         bool tx_dif_conn_err_en;
  43         bool ignore_app_tag;
  44         bool keep_ref_tag_const;
  45         bool validate_guard;
  46         bool validate_app_tag;
  47         bool validate_ref_tag;
  48         bool forward_guard;
  49         bool forward_app_tag;
  50         bool forward_ref_tag;
  51         bool forward_app_tag_with_mask;
  52         bool forward_ref_tag_with_mask;
  53 };
  54
  55 struct scsi_initiator_cmd_params {
  56          /* for cdb_size > default CDB size (extended CDB > 16 bytes) ->
  57           * pointer to the CDB buffer SGE
  58           */
  59         struct scsi_sge extended_cdb_sge;
  60
  61         /* Physical address of sense data buffer for sense data - 256B buffer */
  62         struct regpair sense_data_buffer_phys_addr;
  63 };
  64
  65 /**
  66  * @brief scsi_is_slow_sgl - checks for slow SGL
  67  *
  68  * @param num_sges - number of sges in SGL
  69  * @param small_mid_sge - True is the SGL contains an SGE which is smaller than
  70  * 4KB and its not the 1st or last SGE in the SGL
  71  */
  72 bool scsi_is_slow_sgl(u16 num_sges, bool small_mid_sge);
  73
  74 /**
  75  * @brief init_scsi_sgl_context - initializes SGL task context
  76  *
  77  * @param sgl_params - SGL context parameters to initialize (output parameter)
  78  * @param data_desc - context struct containing SGEs array to set (output
  79  * parameter)
  80  * @param sgl_task_params - SGL parameters (input)
  81  */
  82 void init_scsi_sgl_context(struct scsi_sgl_params *sgl_params,
  83         struct scsi_cached_sges *ctx_data_desc,
  84         struct scsi_sgl_task_params *sgl_task_params);
  85 #endif