1 /* QLogic FCoE Offload Driver
2  * Copyright (c) 2016-2017 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
86