xref: /illumos-gate/usr/src/uts/common/io/qede/579xx/drivers/ecore/hsi_repository/iscsi_common.h (revision 14b24e2b79293068c8e016a69ef1d872fb5e2fd5)
1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, v.1,  (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://opensource.org/licenses/CDDL-1.0.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21 
22 /*
23 * Copyright 2014-2017 Cavium, Inc.
24 * The contents of this file are subject to the terms of the Common Development
25 * and Distribution License, v.1,  (the "License").
26 
27 * You may not use this file except in compliance with the License.
28 
29 * You can obtain a copy of the License at available
30 * at http://opensource.org/licenses/CDDL-1.0
31 
32 * See the License for the specific language governing permissions and
33 * limitations under the License.
34 */
35 
36 #ifndef __ISCSI_COMMON__
37 #define __ISCSI_COMMON__
38 /**********************/
39 /* ISCSI FW CONSTANTS */
40 /**********************/
41 
42 /* iSCSI HSI constants */
43 #define ISCSI_DEFAULT_MTU	(1500)
44 
45 /* KWQ (kernel work queue) layer codes */
46 #define ISCSI_SLOW_PATH_LAYER_CODE   (6)
47 
48 /* iSCSI parameter defaults */
49 #define ISCSI_DEFAULT_HEADER_DIGEST         (0)
50 #define ISCSI_DEFAULT_DATA_DIGEST           (0)
51 #define ISCSI_DEFAULT_INITIAL_R2T           (1)
52 #define ISCSI_DEFAULT_IMMEDIATE_DATA        (1)
53 #define ISCSI_DEFAULT_MAX_PDU_LENGTH        (0x2000)
54 #define ISCSI_DEFAULT_FIRST_BURST_LENGTH    (0x10000)
55 #define ISCSI_DEFAULT_MAX_BURST_LENGTH      (0x40000)
56 #define ISCSI_DEFAULT_MAX_OUTSTANDING_R2T   (1)
57 
58 /* iSCSI parameter limits */
59 #define ISCSI_MIN_VAL_MAX_PDU_LENGTH        (0x200)
60 #define ISCSI_MAX_VAL_MAX_PDU_LENGTH        (0xffffff)
61 #define ISCSI_MIN_VAL_BURST_LENGTH          (0x200)
62 #define ISCSI_MAX_VAL_BURST_LENGTH          (0xffffff)
63 #define ISCSI_MIN_VAL_MAX_OUTSTANDING_R2T   (1)
64 #define ISCSI_MAX_VAL_MAX_OUTSTANDING_R2T   (0xff) // 0x10000 according to RFC
65 
66 #define ISCSI_AHS_CNTL_SIZE 4
67 
68 #define ISCSI_WQE_NUM_SGES_SLOWIO           (0xf)
69 
70 /* iSCSI reserved params */
71 #define ISCSI_ITT_ALL_ONES					(0xffffffff)
72 #define ISCSI_TTT_ALL_ONES					(0xffffffff)
73 
74 #define ISCSI_OPTION_1_OFF_CHIP_TCP 1
75 #define ISCSI_OPTION_2_ON_CHIP_TCP 2
76 
77 #define ISCSI_INITIATOR_MODE 0
78 #define ISCSI_TARGET_MODE 1
79 
80 
81 /* iSCSI request op codes */
82 #define ISCSI_OPCODE_NOP_OUT				(0)
83 #define ISCSI_OPCODE_SCSI_CMD       		(1)
84 #define ISCSI_OPCODE_TMF_REQUEST			(2)
85 #define ISCSI_OPCODE_LOGIN_REQUEST			(3)
86 #define ISCSI_OPCODE_TEXT_REQUEST       	(4)
87 #define ISCSI_OPCODE_DATA_OUT				(5)
88 #define ISCSI_OPCODE_LOGOUT_REQUEST     	(6)
89 
90 /* iSCSI response/messages op codes */
91 #define ISCSI_OPCODE_NOP_IN             (0x20)
92 #define ISCSI_OPCODE_SCSI_RESPONSE      (0x21)
93 #define ISCSI_OPCODE_TMF_RESPONSE       (0x22)
94 #define ISCSI_OPCODE_LOGIN_RESPONSE     (0x23)
95 #define ISCSI_OPCODE_TEXT_RESPONSE      (0x24)
96 #define ISCSI_OPCODE_DATA_IN            (0x25)
97 #define ISCSI_OPCODE_LOGOUT_RESPONSE    (0x26)
98 #define ISCSI_OPCODE_R2T                (0x31)
99 #define ISCSI_OPCODE_ASYNC_MSG          (0x32)
100 #define ISCSI_OPCODE_REJECT             (0x3f)
101 
102 /* iSCSI stages */
103 #define ISCSI_STAGE_SECURITY_NEGOTIATION            (0)
104 #define ISCSI_STAGE_LOGIN_OPERATIONAL_NEGOTIATION   (1)
105 #define ISCSI_STAGE_FULL_FEATURE_PHASE              (3)
106 
107 /* iSCSI CQE errors */
108 #define CQE_ERROR_BITMAP_DATA_DIGEST          (0x08)
109 #define CQE_ERROR_BITMAP_RCV_ON_INVALID_CONN  (0x10)
110 #define CQE_ERROR_BITMAP_DATA_TRUNCATED       (0x20)
111 
112 
113 /*
114  * ISCSI SGL entry
115  */
116 struct cqe_error_bitmap
117 {
118 	u8 cqe_error_status_bits;
119 #define CQE_ERROR_BITMAP_DIF_ERR_BITS_MASK         0x7 /* Mark task with DIF error (3 bit): [0]-CRC/checksum, [1]-app tag, [2]-reference tag */
120 #define CQE_ERROR_BITMAP_DIF_ERR_BITS_SHIFT        0
121 #define CQE_ERROR_BITMAP_DATA_DIGEST_ERR_MASK      0x1 /* Mark task with data digest error (1 bit) */
122 #define CQE_ERROR_BITMAP_DATA_DIGEST_ERR_SHIFT     3
123 #define CQE_ERROR_BITMAP_RCV_ON_INVALID_CONN_MASK  0x1 /* Mark receive on invalid connection */
124 #define CQE_ERROR_BITMAP_RCV_ON_INVALID_CONN_SHIFT 4
125 #define CQE_ERROR_BITMAP_DATA_TRUNCATED_ERR_MASK   0x1 /* Target Mode - Mark middle task error, data truncated */
126 #define CQE_ERROR_BITMAP_DATA_TRUNCATED_ERR_SHIFT  5
127 #define CQE_ERROR_BITMAP_UNDER_RUN_ERR_MASK        0x1
128 #define CQE_ERROR_BITMAP_UNDER_RUN_ERR_SHIFT       6
129 #define CQE_ERROR_BITMAP_RESERVED2_MASK            0x1
130 #define CQE_ERROR_BITMAP_RESERVED2_SHIFT           7
131 };
132 
133 
134 union cqe_error_status
135 {
136 	u8 error_status /* all error bits as uint8 */;
137 	struct cqe_error_bitmap error_bits /* cqe errors bitmap */;
138 };
139 
140 
141 /*
142  * iSCSI Login Response PDU header
143  */
144 struct data_hdr
145 {
146 	__le32 data[12] /* iscsi header data */;
147 };
148 
149 
150 /*
151  * iSCSI Asynchronous Message PDU header
152  */
153 struct iscsi_async_msg_hdr
154 {
155 	__le16 reserved0 /* reserved */;
156 	u8 flags_attr;
157 #define ISCSI_ASYNC_MSG_HDR_RSRV_MASK           0x7F /* reserved */
158 #define ISCSI_ASYNC_MSG_HDR_RSRV_SHIFT          0
159 #define ISCSI_ASYNC_MSG_HDR_CONST1_MASK         0x1 /* const1 */
160 #define ISCSI_ASYNC_MSG_HDR_CONST1_SHIFT        7
161 	u8 opcode /* opcode */;
162 	__le32 hdr_second_dword;
163 #define ISCSI_ASYNC_MSG_HDR_DATA_SEG_LEN_MASK   0xFFFFFF /* DataSegmentLength */
164 #define ISCSI_ASYNC_MSG_HDR_DATA_SEG_LEN_SHIFT  0
165 #define ISCSI_ASYNC_MSG_HDR_TOTAL_AHS_LEN_MASK  0xFF /* TotalAHSLength */
166 #define ISCSI_ASYNC_MSG_HDR_TOTAL_AHS_LEN_SHIFT 24
167 	struct regpair lun /* Logical Unit Number */;
168 	__le32 all_ones /* should be 0xffffffff */;
169 	__le32 reserved1 /* reserved */;
170 	__le32 stat_sn /* stat_sn */;
171 	__le32 exp_cmd_sn /* exp_cmd_sn */;
172 	__le32 max_cmd_sn /* max_cmd_sn */;
173 	__le16 param1_rsrv /* Parameter1 or Reserved */;
174 	u8 async_vcode /* AsuncVCode */;
175 	u8 async_event /* AsyncEvent */;
176 	__le16 param3_rsrv /* Parameter3 or Reserved */;
177 	__le16 param2_rsrv /* Parameter2 or Reserved */;
178 	__le32 reserved7 /* reserved */;
179 };
180 
181 
182 /*
183  * iSCSI Command PDU header
184  */
185 struct iscsi_cmd_hdr
186 {
187 	__le16 reserved1 /* reserved */;
188 	u8 flags_attr;
189 #define ISCSI_CMD_HDR_ATTR_MASK           0x7 /* attributes */
190 #define ISCSI_CMD_HDR_ATTR_SHIFT          0
191 #define ISCSI_CMD_HDR_RSRV_MASK           0x3 /* reserved */
192 #define ISCSI_CMD_HDR_RSRV_SHIFT          3
193 #define ISCSI_CMD_HDR_WRITE_MASK          0x1 /* write */
194 #define ISCSI_CMD_HDR_WRITE_SHIFT         5
195 #define ISCSI_CMD_HDR_READ_MASK           0x1 /* read */
196 #define ISCSI_CMD_HDR_READ_SHIFT          6
197 #define ISCSI_CMD_HDR_FINAL_MASK          0x1 /* final */
198 #define ISCSI_CMD_HDR_FINAL_SHIFT         7
199 	u8 hdr_first_byte;
200 #define ISCSI_CMD_HDR_OPCODE_MASK         0x3F /* Opcode */
201 #define ISCSI_CMD_HDR_OPCODE_SHIFT        0
202 #define ISCSI_CMD_HDR_IMM_MASK            0x1 /* Immediate delivery */
203 #define ISCSI_CMD_HDR_IMM_SHIFT           6
204 #define ISCSI_CMD_HDR_RSRV1_MASK          0x1 /* first bit of iSCSI PDU header */
205 #define ISCSI_CMD_HDR_RSRV1_SHIFT         7
206 	__le32 hdr_second_dword;
207 #define ISCSI_CMD_HDR_DATA_SEG_LEN_MASK   0xFFFFFF /* DataSegmentLength */
208 #define ISCSI_CMD_HDR_DATA_SEG_LEN_SHIFT  0
209 #define ISCSI_CMD_HDR_TOTAL_AHS_LEN_MASK  0xFF /* TotalAHSLength */
210 #define ISCSI_CMD_HDR_TOTAL_AHS_LEN_SHIFT 24
211 	struct regpair lun /* Logical Unit Number. [constant, initialized] */;
212 	__le32 itt /* Initiator Task Tag (only 2 bytes are significant). [constant, initialized] */;
213 	__le32 expected_transfer_length /* Expected Data Transfer Length (only 3 bytes are significant) */;
214 	__le32 cmd_sn /* CmdSn. [constant, initialized] */;
215 	__le32 exp_stat_sn /* various fields for middle-path PDU. [constant, initialized] */;
216 	__le32 cdb[4] /* CDB. [constant, initialized] */;
217 };
218 
219 
220 /*
221  * iSCSI Common PDU header
222  */
223 struct iscsi_common_hdr
224 {
225 	u8 hdr_status /* Status field of ISCSI header */;
226 	u8 hdr_response /* Response field of ISCSI header for Responses / Reserved for Data-In */;
227 	u8 hdr_flags /* Flags field of ISCSI header */;
228 	u8 hdr_first_byte;
229 #define ISCSI_COMMON_HDR_OPCODE_MASK         0x3F /* Opcode */
230 #define ISCSI_COMMON_HDR_OPCODE_SHIFT        0
231 #define ISCSI_COMMON_HDR_IMM_MASK            0x1 /* Immediate */
232 #define ISCSI_COMMON_HDR_IMM_SHIFT           6
233 #define ISCSI_COMMON_HDR_RSRV_MASK           0x1 /* first bit of iSCSI PDU header */
234 #define ISCSI_COMMON_HDR_RSRV_SHIFT          7
235 	__le32 hdr_second_dword;
236 #define ISCSI_COMMON_HDR_DATA_SEG_LEN_MASK   0xFFFFFF /* DataSegmentLength */
237 #define ISCSI_COMMON_HDR_DATA_SEG_LEN_SHIFT  0
238 #define ISCSI_COMMON_HDR_TOTAL_AHS_LEN_MASK  0xFF /* TotalAHSLength */
239 #define ISCSI_COMMON_HDR_TOTAL_AHS_LEN_SHIFT 24
240 	struct regpair lun_reserved /* Bytes 8..15 : LUN (if PDU contains a LUN field) or reserved */;
241 	__le32 itt /* ITT - common to all headers */;
242 	__le32 ttt /* bytes 20 to 23 - common ttt to various PDU headers */;
243 	__le32 cmdstat_sn /* bytes 24 to 27 - common cmd_sn (initiator) or stat_sn (target) to various PDU headers */;
244 	__le32 exp_statcmd_sn /* bytes 28 to 31 - common expected stat_sn (initiator) or cmd_sn (target) to various PDU headers */;
245 	__le32 max_cmd_sn /* bytes 32 to 35 - common max cmd_sn to various PDU headers */;
246 	__le32 data[3] /* bytes 36 to 47 */;
247 };
248 
249 
250 /*
251  * ISCSI connection offload params passed by driver to FW in ISCSI offload ramrod
252  */
253 struct iscsi_conn_offload_params
254 {
255 	struct regpair sq_pbl_addr /* PBL SQ pointer */;
256 	struct regpair r2tq_pbl_addr /* PBL R2TQ pointer */;
257 	struct regpair xhq_pbl_addr /* PBL XHQ pointer */;
258 	struct regpair uhq_pbl_addr /* PBL UHQ pointer */;
259 	__le32 initial_ack /* Initial ack, received from TCP */;
260 	__le16 physical_q0 /* Physical QM queue to be tied to logical Q0 */;
261 	__le16 physical_q1 /* Physical QM queue to be tied to logical Q1 */;
262 	u8 flags;
263 #define ISCSI_CONN_OFFLOAD_PARAMS_TCP_ON_CHIP_1B_MASK   0x1 /* TCP connect/terminate option. 0 - TCP on host (option-1); 1 - TCP on chip (option-2). */
264 #define ISCSI_CONN_OFFLOAD_PARAMS_TCP_ON_CHIP_1B_SHIFT  0
265 #define ISCSI_CONN_OFFLOAD_PARAMS_TARGET_MODE_MASK      0x1 /* iSCSI connect mode: 0-iSCSI Initiator, 1-iSCSI Target */
266 #define ISCSI_CONN_OFFLOAD_PARAMS_TARGET_MODE_SHIFT     1
267 #define ISCSI_CONN_OFFLOAD_PARAMS_RESTRICTED_MODE_MASK  0x1 /* Restricted mode: 0 - un-restricted (deviating from the RFC), 1 - restricted (according to the RFC) */
268 #define ISCSI_CONN_OFFLOAD_PARAMS_RESTRICTED_MODE_SHIFT 2
269 #define ISCSI_CONN_OFFLOAD_PARAMS_RESERVED1_MASK        0x1F /* reserved */
270 #define ISCSI_CONN_OFFLOAD_PARAMS_RESERVED1_SHIFT       3
271 	u8 pbl_page_size_log /* Page size with PBEs log; Page Size = 2^(page_size_log+12) */;
272 	u8 pbe_page_size_log /* PBE page size with log; Page Size = 2^(page_size_log+12) */;
273 	u8 default_cq /* Default CQ used to write unsolicited data */;
274 	__le32 stat_sn /* StatSn for Target Mode only: the first Login Response StatSn value for Target mode */;
275 };
276 
277 
278 /*
279  * spe message header
280  */
281 struct iscsi_slow_path_hdr
282 {
283 	u8 op_code /* iscsi bus-drv message opcode */;
284 	u8 flags;
285 #define ISCSI_SLOW_PATH_HDR_RESERVED0_MASK   0xF
286 #define ISCSI_SLOW_PATH_HDR_RESERVED0_SHIFT  0
287 #define ISCSI_SLOW_PATH_HDR_LAYER_CODE_MASK  0x7 /* protocol layer (L2,L3,L4,L5) */
288 #define ISCSI_SLOW_PATH_HDR_LAYER_CODE_SHIFT 4
289 #define ISCSI_SLOW_PATH_HDR_RESERVED1_MASK   0x1
290 #define ISCSI_SLOW_PATH_HDR_RESERVED1_SHIFT  7
291 };
292 
293 /*
294  * ISCSI connection update params passed by driver to FW in ISCSI update ramrod
295  */
296 struct iscsi_conn_update_ramrod_params
297 {
298 	struct iscsi_slow_path_hdr hdr /* spe message header. */;
299 	__le16 conn_id /* ISCSI Connection ID. (MOTI_COHEN : draft for DrvSim sake) */;
300 	__le32 fw_cid /* Context ID (cid) of the connection. (MOTI_COHEN : draft for DrvSim sake) */;
301 	u8 flags;
302 #define ISCSI_CONN_UPDATE_RAMROD_PARAMS_HD_EN_MASK           0x1 /* Is header digest enabled */
303 #define ISCSI_CONN_UPDATE_RAMROD_PARAMS_HD_EN_SHIFT          0
304 #define ISCSI_CONN_UPDATE_RAMROD_PARAMS_DD_EN_MASK           0x1 /* Is data digest enabled */
305 #define ISCSI_CONN_UPDATE_RAMROD_PARAMS_DD_EN_SHIFT          1
306 #define ISCSI_CONN_UPDATE_RAMROD_PARAMS_INITIAL_R2T_MASK     0x1 /* Initial R2T */
307 #define ISCSI_CONN_UPDATE_RAMROD_PARAMS_INITIAL_R2T_SHIFT    2
308 #define ISCSI_CONN_UPDATE_RAMROD_PARAMS_IMMEDIATE_DATA_MASK  0x1 /* Immediate data */
309 #define ISCSI_CONN_UPDATE_RAMROD_PARAMS_IMMEDIATE_DATA_SHIFT 3
310 #define ISCSI_CONN_UPDATE_RAMROD_PARAMS_DIF_BLOCK_SIZE_MASK  0x1 /* 0 - 512B, 1 - 4K */
311 #define ISCSI_CONN_UPDATE_RAMROD_PARAMS_DIF_BLOCK_SIZE_SHIFT 4
312 #define ISCSI_CONN_UPDATE_RAMROD_PARAMS_DIF_ON_HOST_EN_MASK  0x1 /* 0 - no DIF, 1 - could be enabled per task */
313 #define ISCSI_CONN_UPDATE_RAMROD_PARAMS_DIF_ON_HOST_EN_SHIFT 5
314 #define ISCSI_CONN_UPDATE_RAMROD_PARAMS_RESERVED1_MASK       0x3
315 #define ISCSI_CONN_UPDATE_RAMROD_PARAMS_RESERVED1_SHIFT      6
316 	u8 reserved0[3];
317 	__le32 max_seq_size /* Maximum sequence size. Valid for TX and RX */;
318 	__le32 max_send_pdu_length /* Maximum PDU size. Valid for the TX */;
319 	__le32 max_recv_pdu_length /* Maximum PDU size. Valid for the RX */;
320 	__le32 first_seq_length /* Initial sequence length */;
321 	__le32 exp_stat_sn /* ExpStatSn - Option1 Only */;
322 };
323 
324 
325 /*
326  * iSCSI Command PDU header with Extended CDB (Initiator Mode)
327  */
328 struct iscsi_ext_cdb_cmd_hdr
329 {
330 	__le16 reserved1 /* reserved */;
331 	u8 flags_attr;
332 #define ISCSI_EXT_CDB_CMD_HDR_ATTR_MASK          0x7 /* attributes */
333 #define ISCSI_EXT_CDB_CMD_HDR_ATTR_SHIFT         0
334 #define ISCSI_EXT_CDB_CMD_HDR_RSRV_MASK          0x3 /* reserved */
335 #define ISCSI_EXT_CDB_CMD_HDR_RSRV_SHIFT         3
336 #define ISCSI_EXT_CDB_CMD_HDR_WRITE_MASK         0x1 /* write */
337 #define ISCSI_EXT_CDB_CMD_HDR_WRITE_SHIFT        5
338 #define ISCSI_EXT_CDB_CMD_HDR_READ_MASK          0x1 /* read */
339 #define ISCSI_EXT_CDB_CMD_HDR_READ_SHIFT         6
340 #define ISCSI_EXT_CDB_CMD_HDR_FINAL_MASK         0x1 /* final */
341 #define ISCSI_EXT_CDB_CMD_HDR_FINAL_SHIFT        7
342 	u8 opcode /* opcode. [constant, initialized] */;
343 	__le32 hdr_second_dword;
344 #define ISCSI_EXT_CDB_CMD_HDR_DATA_SEG_LEN_MASK  0xFFFFFF /* DataSegmentLength */
345 #define ISCSI_EXT_CDB_CMD_HDR_DATA_SEG_LEN_SHIFT 0
346 #define ISCSI_EXT_CDB_CMD_HDR_CDB_SIZE_MASK      0xFF /* The Extended CDB size in bytes. Maximum Extended CDB size supported is CDB 64B. */
347 #define ISCSI_EXT_CDB_CMD_HDR_CDB_SIZE_SHIFT     24
348 	struct regpair lun /* Logical Unit Number. [constant, initialized] */;
349 	__le32 itt /* Initiator Task Tag (only 2 bytes are significant). [constant, initialized] */;
350 	__le32 expected_transfer_length /* Expected Data Transfer Length (only 3 bytes are significant) */;
351 	__le32 cmd_sn /* CmdSn. [constant, initialized] */;
352 	__le32 exp_stat_sn /* various fields for middle-path PDU. [constant, initialized] */;
353 	struct scsi_sge cdb_sge /* Extended CDBs dedicated SGE */;
354 };
355 
356 /*
357  * iSCSI login request PDU header
358  */
359 struct iscsi_login_req_hdr
360 {
361 	u8 version_min /* Version-min */;
362 	u8 version_max /* Version-max */;
363 	u8 flags_attr;
364 #define ISCSI_LOGIN_REQ_HDR_NSG_MASK            0x3 /* Next Stage (NSG) */
365 #define ISCSI_LOGIN_REQ_HDR_NSG_SHIFT           0
366 #define ISCSI_LOGIN_REQ_HDR_CSG_MASK            0x3 /* Current stage (CSG) */
367 #define ISCSI_LOGIN_REQ_HDR_CSG_SHIFT           2
368 #define ISCSI_LOGIN_REQ_HDR_RSRV_MASK           0x3 /* reserved */
369 #define ISCSI_LOGIN_REQ_HDR_RSRV_SHIFT          4
370 #define ISCSI_LOGIN_REQ_HDR_C_MASK              0x1 /* C (Continue) bit */
371 #define ISCSI_LOGIN_REQ_HDR_C_SHIFT             6
372 #define ISCSI_LOGIN_REQ_HDR_T_MASK              0x1 /* T (Transit) bit */
373 #define ISCSI_LOGIN_REQ_HDR_T_SHIFT             7
374 	u8 opcode /* opcode. [constant, initialized] */;
375 	__le32 hdr_second_dword;
376 #define ISCSI_LOGIN_REQ_HDR_DATA_SEG_LEN_MASK   0xFFFFFF /* DataSegmentLength */
377 #define ISCSI_LOGIN_REQ_HDR_DATA_SEG_LEN_SHIFT  0
378 #define ISCSI_LOGIN_REQ_HDR_TOTAL_AHS_LEN_MASK  0xFF /* TotalAHSLength */
379 #define ISCSI_LOGIN_REQ_HDR_TOTAL_AHS_LEN_SHIFT 24
380 	__le32 isid_tabc /* Session identifier high double word [constant, initialized] */;
381 	__le16 tsih /* TSIH */;
382 	__le16 isid_d /* Session identifier low word [constant, initialized] */;
383 	__le32 itt /* Initiator Task Tag (only 2 bytes are significant). [constant, initialized] */;
384 	__le16 reserved1;
385 	__le16 cid /* Unique Connection ID within the session [constant, initialized] */;
386 	__le32 cmd_sn /* CmdSn. [constant, initialized] */;
387 	__le32 exp_stat_sn /* various fields for middle-path PDU. [constant, initialized] */;
388 	__le32 reserved2[4];
389 };
390 
391 /*
392  * iSCSI logout request PDU header
393  */
394 struct iscsi_logout_req_hdr
395 {
396 	__le16 reserved0 /* reserved */;
397 	u8 reason_code /* Reason Code */;
398 	u8 opcode /* opcode. [constant, initialized] */;
399 	__le32 reserved1;
400 	__le32 reserved2[2] /* Reserved */;
401 	__le32 itt /* Initiator Task Tag (only 2 bytes are significant). [constant, initialized] */;
402 	__le16 reserved3 /* Reserved */;
403 	__le16 cid /* Unique Connection ID within the session [constant, initialized] */;
404 	__le32 cmd_sn /* CmdSn. [constant, initialized] */;
405 	__le32 exp_stat_sn /* various fields for middle-path PDU. [constant, initialized] */;
406 	__le32 reserved4[4] /* Reserved */;
407 };
408 
409 /*
410  * iSCSI Data-out PDU header
411  */
412 struct iscsi_data_out_hdr
413 {
414 	__le16 reserved1 /* reserved */;
415 	u8 flags_attr;
416 #define ISCSI_DATA_OUT_HDR_RSRV_MASK   0x7F /* reserved */
417 #define ISCSI_DATA_OUT_HDR_RSRV_SHIFT  0
418 #define ISCSI_DATA_OUT_HDR_FINAL_MASK  0x1 /* final */
419 #define ISCSI_DATA_OUT_HDR_FINAL_SHIFT 7
420 	u8 opcode /* opcode */;
421 	__le32 reserved2 /* reserved */;
422 	struct regpair lun /* Logical Unit Number */;
423 	__le32 itt /* Initiator Task Tag (only 2 bytes are significant) */;
424 	__le32 ttt /* Target Transfer Tag (from R2T) */;
425 	__le32 reserved3 /* resrved */;
426 	__le32 exp_stat_sn /* Expected StatSn */;
427 	__le32 reserved4 /* resrved */;
428 	__le32 data_sn /* DataSN - PDU index in sequnece */;
429 	__le32 buffer_offset /* Buffer Offset - offset in task */;
430 	__le32 reserved5 /* resrved */;
431 };
432 
433 /*
434  * iSCSI Data-in PDU header
435  */
436 struct iscsi_data_in_hdr
437 {
438 	u8 status_rsvd /* Status or reserved */;
439 	u8 reserved1 /* reserved */;
440 	u8 flags;
441 #define ISCSI_DATA_IN_HDR_STATUS_MASK     0x1 /* Status */
442 #define ISCSI_DATA_IN_HDR_STATUS_SHIFT    0
443 #define ISCSI_DATA_IN_HDR_UNDERFLOW_MASK  0x1 /* Residual Underflow */
444 #define ISCSI_DATA_IN_HDR_UNDERFLOW_SHIFT 1
445 #define ISCSI_DATA_IN_HDR_OVERFLOW_MASK   0x1 /* Residual Overflow */
446 #define ISCSI_DATA_IN_HDR_OVERFLOW_SHIFT  2
447 #define ISCSI_DATA_IN_HDR_RSRV_MASK       0x7 /* reserved - 0 */
448 #define ISCSI_DATA_IN_HDR_RSRV_SHIFT      3
449 #define ISCSI_DATA_IN_HDR_ACK_MASK        0x1 /* Acknowledge */
450 #define ISCSI_DATA_IN_HDR_ACK_SHIFT       6
451 #define ISCSI_DATA_IN_HDR_FINAL_MASK      0x1 /* final */
452 #define ISCSI_DATA_IN_HDR_FINAL_SHIFT     7
453 	u8 opcode /* opcode */;
454 	__le32 reserved2 /* reserved */;
455 	struct regpair lun /* Logical Unit Number */;
456 	__le32 itt /* Initiator Task Tag (only 2 bytes are significant) */;
457 	__le32 ttt /* Target Transfer Tag (from R2T) */;
458 	__le32 stat_sn /* StatSN or reserved */;
459 	__le32 exp_cmd_sn /* Expected CmdSn */;
460 	__le32 max_cmd_sn /* MaxCmdSn */;
461 	__le32 data_sn /* DataSN - PDU index in sequnece */;
462 	__le32 buffer_offset /* Buffer Offset - offset in task */;
463 	__le32 residual_count /* Residual Count */;
464 };
465 
466 /*
467  * iSCSI R2T PDU header
468  */
469 struct iscsi_r2t_hdr
470 {
471 	u8 reserved0[3] /* reserved */;
472 	u8 opcode /* opcode */;
473 	__le32 reserved2 /* reserved */;
474 	struct regpair lun /* Logical Unit Number */;
475 	__le32 itt /* Initiator Task Tag */;
476 	__le32 ttt /* Target Transfer Tag */;
477 	__le32 stat_sn /* stat sn */;
478 	__le32 exp_cmd_sn /* Expected CmdSn */;
479 	__le32 max_cmd_sn /* Max CmdSn */;
480 	__le32 r2t_sn /* DataSN - PDU index in sequnece */;
481 	__le32 buffer_offset /* Buffer Offset - offset in task */;
482 	__le32 desired_data_trns_len /* Desired data trnsfer len */;
483 };
484 
485 /*
486  * iSCSI NOP-out PDU header
487  */
488 struct iscsi_nop_out_hdr
489 {
490 	__le16 reserved1 /* reserved */;
491 	u8 flags_attr;
492 #define ISCSI_NOP_OUT_HDR_RSRV_MASK    0x7F /* reserved */
493 #define ISCSI_NOP_OUT_HDR_RSRV_SHIFT   0
494 #define ISCSI_NOP_OUT_HDR_CONST1_MASK  0x1 /* const1 */
495 #define ISCSI_NOP_OUT_HDR_CONST1_SHIFT 7
496 	u8 opcode /* opcode */;
497 	__le32 reserved2 /* reserved */;
498 	struct regpair lun /* Logical Unit Number */;
499 	__le32 itt /* Initiator Task Tag (only 2 bytes are significant) */;
500 	__le32 ttt /* Target Transfer Tag (from R2T) */;
501 	__le32 cmd_sn /* CmdSN */;
502 	__le32 exp_stat_sn /* Expected StatSn */;
503 	__le32 reserved3 /* reserved */;
504 	__le32 reserved4 /* reserved */;
505 	__le32 reserved5 /* reserved */;
506 	__le32 reserved6 /* reserved */;
507 };
508 
509 /*
510  * iSCSI NOP-in PDU header
511  */
512 struct iscsi_nop_in_hdr
513 {
514 	__le16 reserved0 /* reserved */;
515 	u8 flags_attr;
516 #define ISCSI_NOP_IN_HDR_RSRV_MASK           0x7F /* reserved */
517 #define ISCSI_NOP_IN_HDR_RSRV_SHIFT          0
518 #define ISCSI_NOP_IN_HDR_CONST1_MASK         0x1 /* const1 */
519 #define ISCSI_NOP_IN_HDR_CONST1_SHIFT        7
520 	u8 opcode /* opcode */;
521 	__le32 hdr_second_dword;
522 #define ISCSI_NOP_IN_HDR_DATA_SEG_LEN_MASK   0xFFFFFF /* DataSegmentLength */
523 #define ISCSI_NOP_IN_HDR_DATA_SEG_LEN_SHIFT  0
524 #define ISCSI_NOP_IN_HDR_TOTAL_AHS_LEN_MASK  0xFF /* TotalAHSLength */
525 #define ISCSI_NOP_IN_HDR_TOTAL_AHS_LEN_SHIFT 24
526 	struct regpair lun /* Logical Unit Number */;
527 	__le32 itt /* Initiator Task Tag (only 2 bytes are significant) */;
528 	__le32 ttt /* Target Transfer Tag */;
529 	__le32 stat_sn /* stat_sn */;
530 	__le32 exp_cmd_sn /* exp_cmd_sn */;
531 	__le32 max_cmd_sn /* max_cmd_sn */;
532 	__le32 reserved5 /* reserved */;
533 	__le32 reserved6 /* reserved */;
534 	__le32 reserved7 /* reserved */;
535 };
536 
537 /*
538  * iSCSI Login Response PDU header
539  */
540 struct iscsi_login_response_hdr
541 {
542 	u8 version_active /* Version-active */;
543 	u8 version_max /* Version-max */;
544 	u8 flags_attr;
545 #define ISCSI_LOGIN_RESPONSE_HDR_NSG_MASK            0x3 /* Next Stage (NSG) */
546 #define ISCSI_LOGIN_RESPONSE_HDR_NSG_SHIFT           0
547 #define ISCSI_LOGIN_RESPONSE_HDR_CSG_MASK            0x3 /* Current stage (CSG) */
548 #define ISCSI_LOGIN_RESPONSE_HDR_CSG_SHIFT           2
549 #define ISCSI_LOGIN_RESPONSE_HDR_RSRV_MASK           0x3 /* reserved */
550 #define ISCSI_LOGIN_RESPONSE_HDR_RSRV_SHIFT          4
551 #define ISCSI_LOGIN_RESPONSE_HDR_C_MASK              0x1 /* C (Continue) bit */
552 #define ISCSI_LOGIN_RESPONSE_HDR_C_SHIFT             6
553 #define ISCSI_LOGIN_RESPONSE_HDR_T_MASK              0x1 /* T (Transit) bit */
554 #define ISCSI_LOGIN_RESPONSE_HDR_T_SHIFT             7
555 	u8 opcode /* opcode. [constant, initialized] */;
556 	__le32 hdr_second_dword;
557 #define ISCSI_LOGIN_RESPONSE_HDR_DATA_SEG_LEN_MASK   0xFFFFFF /* DataSegmentLength */
558 #define ISCSI_LOGIN_RESPONSE_HDR_DATA_SEG_LEN_SHIFT  0
559 #define ISCSI_LOGIN_RESPONSE_HDR_TOTAL_AHS_LEN_MASK  0xFF /* TotalAHSLength */
560 #define ISCSI_LOGIN_RESPONSE_HDR_TOTAL_AHS_LEN_SHIFT 24
561 	__le32 isid_tabc /* Session identifier high double word [constant, initialized] */;
562 	__le16 tsih /* TSIH */;
563 	__le16 isid_d /* Session identifier low word [constant, initialized] */;
564 	__le32 itt /* Initiator Task Tag (only 2 bytes are significant). [constant, initialized] */;
565 	__le32 reserved1;
566 	__le32 stat_sn /* CmdSn. [constant, initialized] */;
567 	__le32 exp_cmd_sn /* various fields for middle-path PDU. [constant, initialized] */;
568 	__le32 max_cmd_sn /* max_cmd_sn */;
569 	__le16 reserved2;
570 	u8 status_detail /* status_detail */;
571 	u8 status_class /* status_class */;
572 	__le32 reserved4[2];
573 };
574 
575 /*
576  * iSCSI Logout Response PDU header
577  */
578 struct iscsi_logout_response_hdr
579 {
580 	u8 reserved1 /* reserved */;
581 	u8 response /* response */;
582 	u8 flags /* flags and attributes */;
583 	u8 opcode /* opcode. [constant, initialized] */;
584 	__le32 hdr_second_dword;
585 #define ISCSI_LOGOUT_RESPONSE_HDR_DATA_SEG_LEN_MASK   0xFFFFFF /* DataSegmentLength */
586 #define ISCSI_LOGOUT_RESPONSE_HDR_DATA_SEG_LEN_SHIFT  0
587 #define ISCSI_LOGOUT_RESPONSE_HDR_TOTAL_AHS_LEN_MASK  0xFF /* TotalAHSLength */
588 #define ISCSI_LOGOUT_RESPONSE_HDR_TOTAL_AHS_LEN_SHIFT 24
589 	__le32 reserved2[2] /* Reserved */;
590 	__le32 itt /* Initiator Task Tag (only 2 bytes are significant). [constant, initialized] */;
591 	__le32 reserved3 /* Reserved */;
592 	__le32 stat_sn /* CmdSN */;
593 	__le32 exp_cmd_sn /* Expected StatSn */;
594 	__le32 max_cmd_sn /* CmdSN */;
595 	__le32 reserved4 /* Reserved */;
596 	__le16 time_2_retain /* Time to Retain  */;
597 	__le16 time_2_wait /* Time to wait */;
598 	__le32 reserved5[1] /* Reserved */;
599 };
600 
601 /*
602  * iSCSI Text Request PDU header
603  */
604 struct iscsi_text_request_hdr
605 {
606 	__le16 reserved0 /* reserved */;
607 	u8 flags_attr;
608 #define ISCSI_TEXT_REQUEST_HDR_RSRV_MASK           0x3F /* reserved */
609 #define ISCSI_TEXT_REQUEST_HDR_RSRV_SHIFT          0
610 #define ISCSI_TEXT_REQUEST_HDR_C_MASK              0x1 /* C (Continue) bit */
611 #define ISCSI_TEXT_REQUEST_HDR_C_SHIFT             6
612 #define ISCSI_TEXT_REQUEST_HDR_F_MASK              0x1 /* F (Final) bit */
613 #define ISCSI_TEXT_REQUEST_HDR_F_SHIFT             7
614 	u8 opcode /* opcode. [constant, initialized] */;
615 	__le32 hdr_second_dword;
616 #define ISCSI_TEXT_REQUEST_HDR_DATA_SEG_LEN_MASK   0xFFFFFF /* DataSegmentLength */
617 #define ISCSI_TEXT_REQUEST_HDR_DATA_SEG_LEN_SHIFT  0
618 #define ISCSI_TEXT_REQUEST_HDR_TOTAL_AHS_LEN_MASK  0xFF /* TotalAHSLength */
619 #define ISCSI_TEXT_REQUEST_HDR_TOTAL_AHS_LEN_SHIFT 24
620 	struct regpair lun /* Logical Unit Number */;
621 	__le32 itt /* Initiator Task Tag (only 2 bytes are significant). [constant, initialized] */;
622 	__le32 ttt /* Referenced Task Tag or 0xffffffff */;
623 	__le32 cmd_sn /* cmd_sn */;
624 	__le32 exp_stat_sn /* exp_stat_sn */;
625 	__le32 reserved4[4] /* Reserved */;
626 };
627 
628 /*
629  * iSCSI Text Response PDU header
630  */
631 struct iscsi_text_response_hdr
632 {
633 	__le16 reserved1 /* reserved */;
634 	u8 flags;
635 #define ISCSI_TEXT_RESPONSE_HDR_RSRV_MASK           0x3F /* reserved */
636 #define ISCSI_TEXT_RESPONSE_HDR_RSRV_SHIFT          0
637 #define ISCSI_TEXT_RESPONSE_HDR_C_MASK              0x1 /* C (Continue) bit */
638 #define ISCSI_TEXT_RESPONSE_HDR_C_SHIFT             6
639 #define ISCSI_TEXT_RESPONSE_HDR_F_MASK              0x1 /* F (Final) bit */
640 #define ISCSI_TEXT_RESPONSE_HDR_F_SHIFT             7
641 	u8 opcode /* opcode. [constant, initialized] */;
642 	__le32 hdr_second_dword;
643 #define ISCSI_TEXT_RESPONSE_HDR_DATA_SEG_LEN_MASK   0xFFFFFF /* DataSegmentLength */
644 #define ISCSI_TEXT_RESPONSE_HDR_DATA_SEG_LEN_SHIFT  0
645 #define ISCSI_TEXT_RESPONSE_HDR_TOTAL_AHS_LEN_MASK  0xFF /* TotalAHSLength */
646 #define ISCSI_TEXT_RESPONSE_HDR_TOTAL_AHS_LEN_SHIFT 24
647 	struct regpair lun /* Logical Unit Number */;
648 	__le32 itt /* Initiator Task Tag (only 2 bytes are significant). [constant, initialized] */;
649 	__le32 ttt /* Target Task Tag */;
650 	__le32 stat_sn /* CmdSN */;
651 	__le32 exp_cmd_sn /* Expected StatSn */;
652 	__le32 max_cmd_sn /* CmdSN */;
653 	__le32 reserved4[3] /* Reserved */;
654 };
655 
656 /*
657  * iSCSI TMF Request PDU header
658  */
659 struct iscsi_tmf_request_hdr
660 {
661 	__le16 reserved0 /* reserved */;
662 	u8 function /* function */;
663 	u8 opcode /* opcode. [constant, initialized] */;
664 	__le32 hdr_second_dword;
665 #define ISCSI_TMF_REQUEST_HDR_DATA_SEG_LEN_MASK   0xFFFFFF /* DataSegmentLength */
666 #define ISCSI_TMF_REQUEST_HDR_DATA_SEG_LEN_SHIFT  0
667 #define ISCSI_TMF_REQUEST_HDR_TOTAL_AHS_LEN_MASK  0xFF /* TotalAHSLength */
668 #define ISCSI_TMF_REQUEST_HDR_TOTAL_AHS_LEN_SHIFT 24
669 	struct regpair lun /* Logical Unit Number */;
670 	__le32 itt /* Initiator Task Tag (only 2 bytes are significant). [constant, initialized] */;
671 	__le32 rtt /* Referenced Task Tag or 0xffffffff */;
672 	__le32 cmd_sn /* cmd_sn */;
673 	__le32 exp_stat_sn /* exp_stat_sn */;
674 	__le32 ref_cmd_sn /* ref_cmd_sn */;
675 	__le32 exp_data_sn /* exp_data_sn */;
676 	__le32 reserved4[2] /* Reserved */;
677 };
678 
679 struct iscsi_tmf_response_hdr
680 {
681 	u8 reserved2 /* reserved2 */;
682 	u8 hdr_response /* Response field of ISCSI header for Responses / Reserved for Data-In */;
683 	u8 hdr_flags /* Flags field of ISCSI header */;
684 	u8 opcode /* opcode. [constant, initialized] */;
685 	__le32 hdr_second_dword;
686 #define ISCSI_TMF_RESPONSE_HDR_DATA_SEG_LEN_MASK   0xFFFFFF /* DataSegmentLength */
687 #define ISCSI_TMF_RESPONSE_HDR_DATA_SEG_LEN_SHIFT  0
688 #define ISCSI_TMF_RESPONSE_HDR_TOTAL_AHS_LEN_MASK  0xFF /* TotalAHSLength */
689 #define ISCSI_TMF_RESPONSE_HDR_TOTAL_AHS_LEN_SHIFT 24
690 	struct regpair reserved0;
691 	__le32 itt /* Initiator Task Tag (only 2 bytes are significant). [constant, initialized] */;
692 	__le32 reserved1 /* Reserved */;
693 	__le32 stat_sn /* stat_sn */;
694 	__le32 exp_cmd_sn /* exp_cmd_sn */;
695 	__le32 max_cmd_sn /* max_cmd_sn */;
696 	__le32 reserved4[3] /* Reserved */;
697 };
698 
699 /*
700  * iSCSI Response PDU header
701  */
702 struct iscsi_response_hdr
703 {
704 	u8 hdr_status /* Status field of ISCSI header */;
705 	u8 hdr_response /* Response field of ISCSI header for Responses / Reserved for Data-In */;
706 	u8 hdr_flags /* Flags field of ISCSI header */;
707 	u8 opcode /* opcode. [constant, initialized] */;
708 	__le32 hdr_second_dword;
709 #define ISCSI_RESPONSE_HDR_DATA_SEG_LEN_MASK   0xFFFFFF /* DataSegmentLength */
710 #define ISCSI_RESPONSE_HDR_DATA_SEG_LEN_SHIFT  0
711 #define ISCSI_RESPONSE_HDR_TOTAL_AHS_LEN_MASK  0xFF /* TotalAHSLength */
712 #define ISCSI_RESPONSE_HDR_TOTAL_AHS_LEN_SHIFT 24
713 	struct regpair lun /* Logical Unit Number */;
714 	__le32 itt /* Initiator Task Tag (only 2 bytes are significant). [constant, initialized] */;
715 	__le32 snack_tag /* Currently ERL>0 is not supported */;
716 	__le32 stat_sn /* CmdSN */;
717 	__le32 exp_cmd_sn /* Expected StatSn */;
718 	__le32 max_cmd_sn /* CmdSN */;
719 	__le32 exp_data_sn /* exp_data_sn */;
720 	__le32 bi_residual_count /* bi residual count */;
721 	__le32 residual_count /* residual count */;
722 };
723 
724 /*
725  * iSCSI Reject PDU header
726  */
727 struct iscsi_reject_hdr
728 {
729 	u8 reserved4 /* Reserved */;
730 	u8 hdr_reason /* The reject reason */;
731 	u8 hdr_flags /* Flags field of ISCSI header */;
732 	u8 opcode /* opcode. [constant, initialized] */;
733 	__le32 hdr_second_dword;
734 #define ISCSI_REJECT_HDR_DATA_SEG_LEN_MASK   0xFFFFFF /* DataSegmentLength */
735 #define ISCSI_REJECT_HDR_DATA_SEG_LEN_SHIFT  0
736 #define ISCSI_REJECT_HDR_TOTAL_AHS_LEN_MASK  0xFF /* TotalAHSLength */
737 #define ISCSI_REJECT_HDR_TOTAL_AHS_LEN_SHIFT 24
738 	struct regpair reserved0;
739 	__le32 all_ones;
740 	__le32 reserved2;
741 	__le32 stat_sn /* stat_sn */;
742 	__le32 exp_cmd_sn /* exp_cmd_sn */;
743 	__le32 max_cmd_sn /* max_cmd_sn */;
744 	__le32 data_sn /* data_sn */;
745 	__le32 reserved3[2] /* reserved3 */;
746 };
747 
748 /*
749  * PDU header part of Ystorm task context
750  */
751 union iscsi_task_hdr
752 {
753 	struct iscsi_common_hdr common /* Command PDU header */;
754 	struct data_hdr data /* Command PDU header */;
755 	struct iscsi_cmd_hdr cmd /* Command PDU header */;
756 	struct iscsi_ext_cdb_cmd_hdr ext_cdb_cmd /* Command PDU header with extended CDB - Initiator Mode */;
757 	struct iscsi_login_req_hdr login_req /* Login request PDU header */;
758 	struct iscsi_logout_req_hdr logout_req /* Logout request PDU header */;
759 	struct iscsi_data_out_hdr data_out /* Data-out PDU header */;
760 	struct iscsi_data_in_hdr data_in /* Data-in PDU header */;
761 	struct iscsi_r2t_hdr r2t /* R2T PDU header */;
762 	struct iscsi_nop_out_hdr nop_out /* NOP-out PDU header */;
763 	struct iscsi_nop_in_hdr nop_in /* NOP-in PDU header */;
764 	struct iscsi_login_response_hdr login_response /* Login response PDU header */;
765 	struct iscsi_logout_response_hdr logout_response /* Logout response PDU header */;
766 	struct iscsi_text_request_hdr text_request /* Text request PDU header */;
767 	struct iscsi_text_response_hdr text_response /* Text response PDU header */;
768 	struct iscsi_tmf_request_hdr tmf_request /* TMF request PDU header */;
769 	struct iscsi_tmf_response_hdr tmf_response /* TMF response PDU header */;
770 	struct iscsi_response_hdr response /* Text response PDU header */;
771 	struct iscsi_reject_hdr reject /* Reject PDU header */;
772 	struct iscsi_async_msg_hdr async_msg /* Asynchronous Message PDU header */;
773 };
774 
775 /*
776  * iSCSI CQ element
777  */
778 struct iscsi_cqe_common
779 {
780 	__le16 conn_id /* Drivers connection Id */;
781 	u8 cqe_type /* Indicates CQE type */;
782 	union cqe_error_status error_bitmap /* CQE error status */;
783 	__le32 reserved[3];
784 	union iscsi_task_hdr iscsi_hdr /* iscsi header union */;
785 };
786 
787 /*
788  * iSCSI CQ element
789  */
790 struct iscsi_cqe_solicited
791 {
792 	__le16 conn_id /* Drivers connection Id */;
793 	u8 cqe_type /* Indicates CQE type */;
794 	union cqe_error_status error_bitmap /* CQE error status */;
795 	__le16 itid /* initiator itt (Initiator mode) or target ttt (Target mode) */;
796 	u8 task_type /* Task type */;
797 	u8 fw_dbg_field /* FW debug params */;
798 	u8 caused_conn_err /* Equals 1 if this TID caused the connection error, otherwise equals 0. */;
799 	u8 reserved0[3];
800 	__le32 reserved1[1];
801 	union iscsi_task_hdr iscsi_hdr /* iscsi header union */;
802 };
803 
804 /*
805  * iSCSI CQ element
806  */
807 struct iscsi_cqe_unsolicited
808 {
809 	__le16 conn_id /* Drivers connection Id */;
810 	u8 cqe_type /* Indicates CQE type */;
811 	union cqe_error_status error_bitmap /* CQE error status */;
812 	__le16 reserved0 /* Reserved */;
813 	u8 reserved1 /* Reserved */;
814 	u8 unsol_cqe_type /* Represent this unsolicited CQE position in a sequence of packets belonging to the same unsolicited PDU */;
815 	struct regpair rqe_opaque /* Relevant for Unsolicited CQE only: The opaque data of RQ BDQ */;
816 	union iscsi_task_hdr iscsi_hdr /* iscsi header union */;
817 };
818 
819 /*
820  * iSCSI CQ element
821  */
822 union iscsi_cqe
823 {
824 	struct iscsi_cqe_common cqe_common /* Common CQE */;
825 	struct iscsi_cqe_solicited cqe_solicited /* Solicited CQE */;
826 	struct iscsi_cqe_unsolicited cqe_unsolicited /* Unsolicited CQE. relevant only when cqe_opcode == ISCSI_CQE_TYPE_UNSOLICITED */;
827 };
828 
829 
830 /*
831  * iSCSI CQE type
832  */
833 enum iscsi_cqes_type
834 {
835 	ISCSI_CQE_TYPE_SOLICITED=1 /* iSCSI CQE with solicited data */,
836 	ISCSI_CQE_TYPE_UNSOLICITED /* iSCSI CQE with unsolicited data */,
837 	ISCSI_CQE_TYPE_SOLICITED_WITH_SENSE /* iSCSI CQE with solicited with sense data */,
838 	ISCSI_CQE_TYPE_TASK_CLEANUP /* iSCSI CQE task cleanup */,
839 	ISCSI_CQE_TYPE_DUMMY /* iSCSI Dummy CQE */,
840 	MAX_ISCSI_CQES_TYPE
841 };
842 
843 
844 
845 
846 
847 /*
848  * iSCSI CQE type
849  */
850 enum iscsi_cqe_unsolicited_type
851 {
852 	ISCSI_CQE_UNSOLICITED_NONE /* iSCSI CQE with unsolicited data */,
853 	ISCSI_CQE_UNSOLICITED_SINGLE /* iSCSI CQE with unsolicited data */,
854 	ISCSI_CQE_UNSOLICITED_FIRST /* iSCSI CQE with unsolicited data */,
855 	ISCSI_CQE_UNSOLICITED_MIDDLE /* iSCSI CQE with unsolicited data */,
856 	ISCSI_CQE_UNSOLICITED_LAST /* iSCSI CQE with unsolicited data */,
857 	MAX_ISCSI_CQE_UNSOLICITED_TYPE
858 };
859 
860 
861 
862 
863 /*
864  * iscsi debug modes
865  */
866 struct iscsi_debug_modes
867 {
868 	u8 flags;
869 #define ISCSI_DEBUG_MODES_ASSERT_IF_RX_CONN_ERROR_MASK         0x1 /* Assert on Rx connection error */
870 #define ISCSI_DEBUG_MODES_ASSERT_IF_RX_CONN_ERROR_SHIFT        0
871 #define ISCSI_DEBUG_MODES_ASSERT_IF_RECV_RESET_MASK            0x1 /* Assert if TCP RESET arrived */
872 #define ISCSI_DEBUG_MODES_ASSERT_IF_RECV_RESET_SHIFT           1
873 #define ISCSI_DEBUG_MODES_ASSERT_IF_RECV_FIN_MASK              0x1 /* Assert if TCP FIN arrived */
874 #define ISCSI_DEBUG_MODES_ASSERT_IF_RECV_FIN_SHIFT             2
875 #define ISCSI_DEBUG_MODES_ASSERT_IF_RECV_CLEANUP_MASK          0x1 /* Assert if cleanup flow */
876 #define ISCSI_DEBUG_MODES_ASSERT_IF_RECV_CLEANUP_SHIFT         3
877 #define ISCSI_DEBUG_MODES_ASSERT_IF_RECV_REJECT_OR_ASYNC_MASK  0x1 /* Assert if REJECT PDU or ASYNC PDU arrived */
878 #define ISCSI_DEBUG_MODES_ASSERT_IF_RECV_REJECT_OR_ASYNC_SHIFT 4
879 #define ISCSI_DEBUG_MODES_ASSERT_IF_RECV_NOP_MASK              0x1 /* Assert if NOP IN PDU or NOP OUT PDU arrived */
880 #define ISCSI_DEBUG_MODES_ASSERT_IF_RECV_NOP_SHIFT             5
881 #define ISCSI_DEBUG_MODES_ASSERT_IF_DATA_DIGEST_ERROR_MASK     0x1 /* Assert if data digest error */
882 #define ISCSI_DEBUG_MODES_ASSERT_IF_DATA_DIGEST_ERROR_SHIFT    6
883 #define ISCSI_DEBUG_MODES_ASSERT_IF_DIF_ERROR_MASK             0x1 /* Assert if DIF error */
884 #define ISCSI_DEBUG_MODES_ASSERT_IF_DIF_ERROR_SHIFT            7
885 };
886 
887 
888 /*
889  * iSCSI DIF flags
890  */
891 struct iscsi_dif_flags
892 {
893 	u8 flags;
894 #define ISCSI_DIF_FLAGS_PROT_INTERVAL_SIZE_LOG_MASK  0xF /* Protection log interval (9=512 10=1024  11=2048 12=4096 13=8192) */
895 #define ISCSI_DIF_FLAGS_PROT_INTERVAL_SIZE_LOG_SHIFT 0
896 #define ISCSI_DIF_FLAGS_DIF_TO_PEER_MASK             0x1 /* If DIF protection is configured against target (0=no, 1=yes) */
897 #define ISCSI_DIF_FLAGS_DIF_TO_PEER_SHIFT            4
898 #define ISCSI_DIF_FLAGS_HOST_INTERFACE_MASK          0x7 /* If DIF/DIX protection is configured against the host (0=none, 1=DIF, 2=DIX 2 bytes, 3=DIX 4 bytes, 4=DIX 8 bytes) */
899 #define ISCSI_DIF_FLAGS_HOST_INTERFACE_SHIFT         5
900 };
901 
902 
903 /*
904  * iSCSI kernel completion queue IDs
905  */
906 enum iscsi_eqe_opcode
907 {
908 	ISCSI_EVENT_TYPE_INIT_FUNC=0 /* iSCSI response after init Ramrod */,
909 	ISCSI_EVENT_TYPE_DESTROY_FUNC /* iSCSI response after destroy Ramrod */,
910 	ISCSI_EVENT_TYPE_OFFLOAD_CONN /* iSCSI response after option 2 offload Ramrod */,
911 	ISCSI_EVENT_TYPE_UPDATE_CONN /* iSCSI response after update Ramrod */,
912 	ISCSI_EVENT_TYPE_CLEAR_SQ /* iSCSI response after clear sq Ramrod */,
913 	ISCSI_EVENT_TYPE_TERMINATE_CONN /* iSCSI response after termination Ramrod */,
914 	ISCSI_EVENT_TYPE_MAC_UPDATE_CONN /* iSCSI response after MAC address update Ramrod */,
915 	ISCSI_EVENT_TYPE_ASYN_CONNECT_COMPLETE /* iSCSI response after option 2 connect completed (A-syn EQE) */,
916 	ISCSI_EVENT_TYPE_ASYN_TERMINATE_DONE /* iSCSI response after option 2 termination completed (A-syn EQE) */,
917 	RESERVED9 /* reserved9 */,
918 	ISCSI_EVENT_TYPE_START_OF_ERROR_TYPES=10 /* Never returned in EQE, used to separate Regular event types from Error event types */,
919 	ISCSI_EVENT_TYPE_ASYN_ABORT_RCVD /* iSCSI abort response after TCP RST packet recieve (A-syn EQE) */,
920 	ISCSI_EVENT_TYPE_ASYN_CLOSE_RCVD /* iSCSI response after close receive (A-syn EQE) */,
921 	ISCSI_EVENT_TYPE_ASYN_SYN_RCVD /* iSCSI response after TCP SYN+ACK packet receive (A-syn EQE) */,
922 	ISCSI_EVENT_TYPE_ASYN_MAX_RT_TIME /* iSCSI error - tcp max retransmit time (A-syn EQE) */,
923 	ISCSI_EVENT_TYPE_ASYN_MAX_RT_CNT /* iSCSI error - tcp max retransmit count (A-syn EQE) */,
924 	ISCSI_EVENT_TYPE_ASYN_MAX_KA_PROBES_CNT /* iSCSI error - tcp ka probes count (A-syn EQE) */,
925 	ISCSI_EVENT_TYPE_ASYN_FIN_WAIT2 /* iSCSI error - tcp fin wait 2 (A-syn EQE) */,
926 	ISCSI_EVENT_TYPE_ISCSI_CONN_ERROR /* iSCSI error response (A-syn EQE) */,
927 	ISCSI_EVENT_TYPE_TCP_CONN_ERROR /* iSCSI error - tcp error (A-syn EQE) */,
928 	MAX_ISCSI_EQE_OPCODE
929 };
930 
931 
932 /*
933  * iSCSI EQE and CQE completion status
934  */
935 enum iscsi_error_types
936 {
937 	ISCSI_STATUS_NONE=0,
938 	ISCSI_CQE_ERROR_UNSOLICITED_RCV_ON_INVALID_CONN=1,
939 	ISCSI_CONN_ERROR_TASK_CID_MISMATCH /* iSCSI connection error - Corrupted Task context  */,
940 	ISCSI_CONN_ERROR_TASK_NOT_VALID /* iSCSI connection error - The task is not valid  */,
941 	ISCSI_CONN_ERROR_RQ_RING_IS_FULL /* iSCSI connection error - RQ full  */,
942 	ISCSI_CONN_ERROR_CMDQ_RING_IS_FULL /* iSCSI connection error - CMDQ full (Target only)  */,
943 	ISCSI_CONN_ERROR_HQE_CACHING_FAILED /* iSCSI connection error - HQ error  */,
944 	ISCSI_CONN_ERROR_HEADER_DIGEST_ERROR /* iSCSI connection error - Header digest error */,
945 	ISCSI_CONN_ERROR_LOCAL_COMPLETION_ERROR /* iSCSI connection error - Local completion bit is not correct   (A-syn EQE) */,
946 	ISCSI_CONN_ERROR_DATA_OVERRUN /* iSCSI connection error - data overrun */,
947 	ISCSI_CONN_ERROR_OUT_OF_SGES_ERROR /* iSCSI connection error - out of sges in task context */,
948 	ISCSI_CONN_ERROR_IP_OPTIONS_ERROR /* TCP connection error - IP option error  */,
949 	ISCSI_CONN_ERROR_PRS_ERRORS /* TCP connection error - error indication form parser */,
950 	ISCSI_CONN_ERROR_CONNECT_INVALID_TCP_OPTION /* TCP connection error - tcp options error(option 2 only)  */,
951 	ISCSI_CONN_ERROR_TCP_IP_FRAGMENT_ERROR /* TCP connection error - IP fragmentation error  */,
952 	ISCSI_CONN_ERROR_PROTOCOL_ERR_AHS_LEN /* iSCSI connection error - invalid AHS length (Target only)  */,
953 	ISCSI_CONN_ERROR_PROTOCOL_ERR_AHS_TYPE /* iSCSI connection error - invalid AHS type (Target only)  */,
954 	ISCSI_CONN_ERROR_PROTOCOL_ERR_ITT_OUT_OF_RANGE /* iSCSI connection error - invalid ITT  */,
955 	ISCSI_CONN_ERROR_PROTOCOL_ERR_TTT_OUT_OF_RANGE /* iSCSI connection error - invalid TTT (Target only)  */,
956 	ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SEG_LEN_EXCEEDS_PDU_SIZE /* iSCSI connection error - PDU data_seg_len > max receive pdu size */,
957 	ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_OPCODE /* iSCSI connection error - invalid PDU opcode */,
958 	ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_OPCODE_BEFORE_UPDATE /* iSCSI connection error - invalid PDU opcode before update ramrod (Option 2 only)  */,
959 	ISCSI_CONN_ERROR_UNVALID_NOPIN_DSL /* iSCSI connection error - NOPIN dsl > 0 and ITT = 0xffffffff (Initiator only)  */,
960 	ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_CARRIES_NO_DATA /* iSCSI connection error - R2T dsl > 0 (Initiator only)  */,
961 	ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SN /* iSCSI connection error - DATA-SN error  */,
962 	ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_IN_TTT /* iSCSI connection error - DATA-IN TTT error (Initiator only)  */,
963 	ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_OUT_ITT /* iSCSI connection error - DATA-OUT ITT error (Target only)  */,
964 	ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_TTT /* iSCSI connection error - R2T TTT error (Initiator only)  */,
965 	ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_BUFFER_OFFSET /* iSCSI connection error - R2T buffer offset error (Initiator only)  */,
966 	ISCSI_CONN_ERROR_PROTOCOL_ERR_BUFFER_OFFSET_OOO /* iSCSI connection error - DATA PDU buffer offset error  */,
967 	ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_SN /* iSCSI connection error - R2T SN error (Initiator only)  */,
968 	ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_0 /* iSCSI connection error - R2T desired data transfer length = 0 (Initiator only)  */,
969 	ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_1 /* iSCSI connection error - R2T desired data transfer length less then max burst size (Initiator only)  */,
970 	ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_2 /* iSCSI connection error - R2T desired data transfer length + buffer offset > task size (Initiator only)  */,
971 	ISCSI_CONN_ERROR_PROTOCOL_ERR_LUN /* iSCSI connection error - R2T unvalid LUN (Initiator only)  */,
972 	ISCSI_CONN_ERROR_PROTOCOL_ERR_F_BIT_ZERO /* iSCSI connection error - All data has been already received, however it is not the end of sequence (Initiator only)  */,
973 	ISCSI_CONN_ERROR_PROTOCOL_ERR_F_BIT_ZERO_S_BIT_ONE /* iSCSI connection error - S-bit and final bit = 1 (Initiator only)  */,
974 	ISCSI_CONN_ERROR_PROTOCOL_ERR_EXP_STAT_SN /* iSCSI connection error - STAT SN error (Initiator only)  */,
975 	ISCSI_CONN_ERROR_PROTOCOL_ERR_DSL_NOT_ZERO /* iSCSI connection error - TMF or LOGOUT PDUs dsl > 0 (Initiator only)  */,
976 	ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_DSL /* iSCSI connection error - CMD PDU dsl>0 while immediate data is disabled (Target only)  */,
977 	ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SEG_LEN_TOO_BIG /* iSCSI connection error - Data In overrun (Initiator only)  */,
978 	ISCSI_CONN_ERROR_PROTOCOL_ERR_OUTSTANDING_R2T_COUNT /* iSCSI connection error - >1 outstanding R2T (Initiator only)  */,
979 	ISCSI_CONN_ERROR_PROTOCOL_ERR_DIF_TX /* iSCSI connection error - DIF Tx error + DIF error drop is enabled (Target only)  */,
980 	ISCSI_CONN_ERROR_SENSE_DATA_LENGTH /* iSCSI connection error - Sense data length > 256 (Initiator only)  */,
981 	ISCSI_CONN_ERROR_DATA_PLACEMENT_ERROR /* iSCSI connection error - Data placement error  */,
982 	ISCSI_CONN_ERROR_INVALID_ITT /* iSCSI connection error - Invalid ITT (Target Only) */,
983 	ISCSI_ERROR_UNKNOWN /* iSCSI connection error  */,
984 	MAX_ISCSI_ERROR_TYPES
985 };
986 
987 
988 
989 
990 
991 
992 
993 
994 
995 
996 /*
997  * iSCSI Ramrod Command IDs
998  */
999 enum iscsi_ramrod_cmd_id
1000 {
1001 	ISCSI_RAMROD_CMD_ID_UNUSED=0,
1002 	ISCSI_RAMROD_CMD_ID_INIT_FUNC=1 /* iSCSI function init Ramrod */,
1003 	ISCSI_RAMROD_CMD_ID_DESTROY_FUNC=2 /* iSCSI function destroy Ramrod */,
1004 	ISCSI_RAMROD_CMD_ID_OFFLOAD_CONN=3 /* iSCSI connection offload Ramrod */,
1005 	ISCSI_RAMROD_CMD_ID_UPDATE_CONN=4 /* iSCSI connection update Ramrod  */,
1006 	ISCSI_RAMROD_CMD_ID_TERMINATION_CONN=5 /* iSCSI connection offload Ramrod. Command ID known only to FW and VBD */,
1007 	ISCSI_RAMROD_CMD_ID_CLEAR_SQ=6 /* iSCSI connection clear-sq ramrod.  */,
1008 	ISCSI_RAMROD_CMD_ID_MAC_UPDATE=7 /* iSCSI connection update MAC address ramrod.  */,
1009 	MAX_ISCSI_RAMROD_CMD_ID
1010 };
1011 
1012 
1013 struct iscsi_reg1
1014 {
1015 	__le32 reg1_map;
1016 #define ISCSI_REG1_NUM_SGES_MASK   0xF /* Written to R2tQE */
1017 #define ISCSI_REG1_NUM_SGES_SHIFT  0
1018 #define ISCSI_REG1_RESERVED1_MASK  0xFFFFFFF /* reserved */
1019 #define ISCSI_REG1_RESERVED1_SHIFT 4
1020 };
1021 
1022 
1023 
1024 
1025 /*
1026  * Union of data/r2t sequence number
1027  */
1028 union iscsi_seq_num
1029 {
1030 	__le16 data_sn /* data-in sequence number */;
1031 	__le16 r2t_sn /* r2t pdu sequence number */;
1032 };
1033 
1034 
1035 
1036 /*
1037  * ISCSI connection termination request
1038  */
1039 struct iscsi_spe_conn_mac_update
1040 {
1041 	struct iscsi_slow_path_hdr hdr /* spe message header. */;
1042 	__le16 conn_id /* ISCSI Connection ID. */;
1043 	__le32 fw_cid /* Context ID (cid) of the connection. */;
1044 	__le16 remote_mac_addr_lo /* new remote mac address lo */;
1045 	__le16 remote_mac_addr_mid /* new remote mac address mid */;
1046 	__le16 remote_mac_addr_hi /* new remote mac address hi */;
1047 	u8 reserved0[2];
1048 };
1049 
1050 
1051 /*
1052  * ISCSI and TCP connection(Option 1) offload params passed by driver to FW in ISCSI offload ramrod
1053  */
1054 struct iscsi_spe_conn_offload
1055 {
1056 	struct iscsi_slow_path_hdr hdr /* spe message header. */;
1057 	__le16 conn_id /* ISCSI Connection ID. */;
1058 	__le32 fw_cid;
1059 	struct iscsi_conn_offload_params iscsi /* iSCSI session offload params */;
1060 	struct tcp_offload_params tcp /* iSCSI session offload params */;
1061 };
1062 
1063 
1064 /*
1065  * ISCSI and TCP connection(Option 2) offload params passed by driver to FW in ISCSI offload ramrod
1066  */
1067 struct iscsi_spe_conn_offload_option2
1068 {
1069 	struct iscsi_slow_path_hdr hdr /* spe message header. */;
1070 	__le16 conn_id /* ISCSI Connection ID. */;
1071 	__le32 fw_cid;
1072 	struct iscsi_conn_offload_params iscsi /* iSCSI session offload params */;
1073 	struct tcp_offload_params_opt2 tcp /* iSCSI session offload params */;
1074 };
1075 
1076 
1077 /*
1078  * ISCSI connection termination request
1079  */
1080 struct iscsi_spe_conn_termination
1081 {
1082 	struct iscsi_slow_path_hdr hdr /* spe message header. */;
1083 	__le16 conn_id /* ISCSI Connection ID. */;
1084 	__le32 fw_cid /* Context ID (cid) of the connection. */;
1085 	u8 abortive /* Mark termination as abort(reset) flow */;
1086 	u8 reserved0[7];
1087 	struct regpair queue_cnts_addr /* cmdq and unsolicited counters termination params */;
1088 	struct regpair query_params_addr /* query_params_ptr */;
1089 };
1090 
1091 
1092 /*
1093  * iSCSI firmware function destroy parameters
1094  */
1095 struct iscsi_spe_func_dstry
1096 {
1097 	struct iscsi_slow_path_hdr hdr /* spe message header. */;
1098 	__le16 reserved0;
1099 	__le32 reserved1;
1100 };
1101 
1102 
1103 /*
1104  * iSCSI firmware function init parameters
1105  */
1106 struct iscsi_spe_func_init
1107 {
1108 	struct iscsi_slow_path_hdr hdr /* spe message header. */;
1109 	__le16 half_way_close_timeout /* Half Way Close Timeout in Option 2 Close */;
1110 	u8 num_sq_pages_in_ring /* Number of entries in the SQ PBL. Provided by driver at function init spe */;
1111 	u8 num_r2tq_pages_in_ring /* Number of entries in the R2TQ PBL. Provided by driver at function init spe */;
1112 	u8 num_uhq_pages_in_ring /* Number of entries in the uHQ PBL (xHQ entries is X2). Provided by driver at function init spe */;
1113 	u8 ll2_rx_queue_id /* Queue ID of the Light-L2 Rx Queue */;
1114 	u8 ooo_enable /* Enable Out Of Order mode (enable = 1) */;
1115 	struct iscsi_debug_modes debug_mode /* Use iscsi_debug_mode flags */;
1116 	__le16 reserved1;
1117 	__le32 reserved2;
1118 	__le32 reserved3;
1119 	__le32 reserved4;
1120 	struct scsi_init_func_params func_params /* Common SCSI init params passed by driver to FW in function init ramrod */;
1121 	struct scsi_init_func_queues q_params /* SCSI RQ/CQ firmware function init parameters */;
1122 };
1123 
1124 
1125 /*
1126  * The iscsi storm task context of Ystorm
1127  */
1128 struct ystorm_iscsi_task_state
1129 {
1130 	struct scsi_cached_sges data_desc;
1131 	struct scsi_sgl_params sgl_params;
1132 	__le32 exp_r2t_sn /* Initiator mode - Expected R2T PDU index in sequence. [variable, initialized 0] */;
1133 	__le32 buffer_offset /* Payload data offset */;
1134 	union iscsi_seq_num seq_num /* PDU index in sequence */;
1135 	struct iscsi_dif_flags dif_flags /* Dif flags */;
1136 	u8 flags;
1137 #define YSTORM_ISCSI_TASK_STATE_LOCAL_COMP_MASK  0x1 /* local_completion  */
1138 #define YSTORM_ISCSI_TASK_STATE_LOCAL_COMP_SHIFT 0
1139 #define YSTORM_ISCSI_TASK_STATE_SLOW_IO_MASK     0x1 /* Equals 1 if SGL is predicted and 0 otherwise. */
1140 #define YSTORM_ISCSI_TASK_STATE_SLOW_IO_SHIFT    1
1141 #define YSTORM_ISCSI_TASK_STATE_RESERVED0_MASK   0x3F
1142 #define YSTORM_ISCSI_TASK_STATE_RESERVED0_SHIFT  2
1143 };
1144 
1145 /*
1146  * The iscsi storm task context of Ystorm
1147  */
1148 struct ystorm_iscsi_task_rxmit_opt
1149 {
1150 	__le32 fast_rxmit_sge_offset /* SGE offset from which to continue dummy-read or start fast retransmit */;
1151 	__le32 scan_start_buffer_offset /* Starting buffer offset of next retransmit SGL scan */;
1152 	__le32 fast_rxmit_buffer_offset /* Buffer offset from which to continue dummy-read or start fast retransmit */;
1153 	u8 scan_start_sgl_index /* Starting SGL index of next retransmit SGL scan */;
1154 	u8 fast_rxmit_sgl_index /* SGL index from which to continue dummy-read or start fast retransmit */;
1155 	__le16 reserved /* reserved */;
1156 };
1157 
1158 /*
1159  * The iscsi storm task context of Ystorm
1160  */
1161 struct ystorm_iscsi_task_st_ctx
1162 {
1163 	struct ystorm_iscsi_task_state state /* iSCSI task parameters and state */;
1164 	struct ystorm_iscsi_task_rxmit_opt rxmit_opt /* iSCSI retransmit optimizations parameters */;
1165 	union iscsi_task_hdr pdu_hdr /* PDU header - [constant initialized] */;
1166 };
1167 
1168 struct e4_ystorm_iscsi_task_ag_ctx
1169 {
1170 	u8 reserved /* cdu_validation */;
1171 	u8 byte1 /* state */;
1172 	__le16 word0 /* icid */;
1173 	u8 flags0;
1174 #define E4_YSTORM_ISCSI_TASK_AG_CTX_NIBBLE0_MASK     0xF /* connection_type */
1175 #define E4_YSTORM_ISCSI_TASK_AG_CTX_NIBBLE0_SHIFT    0
1176 #define E4_YSTORM_ISCSI_TASK_AG_CTX_BIT0_MASK        0x1 /* exist_in_qm0 */
1177 #define E4_YSTORM_ISCSI_TASK_AG_CTX_BIT0_SHIFT       4
1178 #define E4_YSTORM_ISCSI_TASK_AG_CTX_BIT1_MASK        0x1 /* exist_in_qm1 */
1179 #define E4_YSTORM_ISCSI_TASK_AG_CTX_BIT1_SHIFT       5
1180 #define E4_YSTORM_ISCSI_TASK_AG_CTX_VALID_MASK       0x1 /* bit2 */
1181 #define E4_YSTORM_ISCSI_TASK_AG_CTX_VALID_SHIFT      6
1182 #define E4_YSTORM_ISCSI_TASK_AG_CTX_BIT3_MASK        0x1 /* bit3 */
1183 #define E4_YSTORM_ISCSI_TASK_AG_CTX_BIT3_SHIFT       7
1184 	u8 flags1;
1185 #define E4_YSTORM_ISCSI_TASK_AG_CTX_CF0_MASK         0x3 /* cf0 */
1186 #define E4_YSTORM_ISCSI_TASK_AG_CTX_CF0_SHIFT        0
1187 #define E4_YSTORM_ISCSI_TASK_AG_CTX_CF1_MASK         0x3 /* cf1 */
1188 #define E4_YSTORM_ISCSI_TASK_AG_CTX_CF1_SHIFT        2
1189 #define E4_YSTORM_ISCSI_TASK_AG_CTX_CF2SPECIAL_MASK  0x3 /* cf2special */
1190 #define E4_YSTORM_ISCSI_TASK_AG_CTX_CF2SPECIAL_SHIFT 4
1191 #define E4_YSTORM_ISCSI_TASK_AG_CTX_CF0EN_MASK       0x1 /* cf0en */
1192 #define E4_YSTORM_ISCSI_TASK_AG_CTX_CF0EN_SHIFT      6
1193 #define E4_YSTORM_ISCSI_TASK_AG_CTX_CF1EN_MASK       0x1 /* cf1en */
1194 #define E4_YSTORM_ISCSI_TASK_AG_CTX_CF1EN_SHIFT      7
1195 	u8 flags2;
1196 #define E4_YSTORM_ISCSI_TASK_AG_CTX_BIT4_MASK        0x1 /* bit4 */
1197 #define E4_YSTORM_ISCSI_TASK_AG_CTX_BIT4_SHIFT       0
1198 #define E4_YSTORM_ISCSI_TASK_AG_CTX_RULE0EN_MASK     0x1 /* rule0en */
1199 #define E4_YSTORM_ISCSI_TASK_AG_CTX_RULE0EN_SHIFT    1
1200 #define E4_YSTORM_ISCSI_TASK_AG_CTX_RULE1EN_MASK     0x1 /* rule1en */
1201 #define E4_YSTORM_ISCSI_TASK_AG_CTX_RULE1EN_SHIFT    2
1202 #define E4_YSTORM_ISCSI_TASK_AG_CTX_RULE2EN_MASK     0x1 /* rule2en */
1203 #define E4_YSTORM_ISCSI_TASK_AG_CTX_RULE2EN_SHIFT    3
1204 #define E4_YSTORM_ISCSI_TASK_AG_CTX_RULE3EN_MASK     0x1 /* rule3en */
1205 #define E4_YSTORM_ISCSI_TASK_AG_CTX_RULE3EN_SHIFT    4
1206 #define E4_YSTORM_ISCSI_TASK_AG_CTX_RULE4EN_MASK     0x1 /* rule4en */
1207 #define E4_YSTORM_ISCSI_TASK_AG_CTX_RULE4EN_SHIFT    5
1208 #define E4_YSTORM_ISCSI_TASK_AG_CTX_RULE5EN_MASK     0x1 /* rule5en */
1209 #define E4_YSTORM_ISCSI_TASK_AG_CTX_RULE5EN_SHIFT    6
1210 #define E4_YSTORM_ISCSI_TASK_AG_CTX_RULE6EN_MASK     0x1 /* rule6en */
1211 #define E4_YSTORM_ISCSI_TASK_AG_CTX_RULE6EN_SHIFT    7
1212 	u8 byte2 /* byte2 */;
1213 	__le32 TTT /* reg0 */;
1214 	u8 byte3 /* byte3 */;
1215 	u8 byte4 /* byte4 */;
1216 	__le16 word1 /* word1 */;
1217 };
1218 
1219 struct e4_mstorm_iscsi_task_ag_ctx
1220 {
1221 	u8 cdu_validation /* cdu_validation */;
1222 	u8 byte1 /* state */;
1223 	__le16 task_cid /* icid */;
1224 	u8 flags0;
1225 #define E4_MSTORM_ISCSI_TASK_AG_CTX_CONNECTION_TYPE_MASK     0xF /* connection_type */
1226 #define E4_MSTORM_ISCSI_TASK_AG_CTX_CONNECTION_TYPE_SHIFT    0
1227 #define E4_MSTORM_ISCSI_TASK_AG_CTX_EXIST_IN_QM0_MASK        0x1 /* exist_in_qm0 */
1228 #define E4_MSTORM_ISCSI_TASK_AG_CTX_EXIST_IN_QM0_SHIFT       4
1229 #define E4_MSTORM_ISCSI_TASK_AG_CTX_BIT1_MASK                0x1 /* exist_in_qm1 */
1230 #define E4_MSTORM_ISCSI_TASK_AG_CTX_BIT1_SHIFT               5
1231 #define E4_MSTORM_ISCSI_TASK_AG_CTX_VALID_MASK               0x1 /* bit2 */
1232 #define E4_MSTORM_ISCSI_TASK_AG_CTX_VALID_SHIFT              6
1233 #define E4_MSTORM_ISCSI_TASK_AG_CTX_TASK_CLEANUP_FLAG_MASK   0x1 /* bit3 */
1234 #define E4_MSTORM_ISCSI_TASK_AG_CTX_TASK_CLEANUP_FLAG_SHIFT  7
1235 	u8 flags1;
1236 #define E4_MSTORM_ISCSI_TASK_AG_CTX_TASK_CLEANUP_CF_MASK     0x3 /* cf0 */
1237 #define E4_MSTORM_ISCSI_TASK_AG_CTX_TASK_CLEANUP_CF_SHIFT    0
1238 #define E4_MSTORM_ISCSI_TASK_AG_CTX_CF1_MASK                 0x3 /* cf1 */
1239 #define E4_MSTORM_ISCSI_TASK_AG_CTX_CF1_SHIFT                2
1240 #define E4_MSTORM_ISCSI_TASK_AG_CTX_CF2_MASK                 0x3 /* cf2 */
1241 #define E4_MSTORM_ISCSI_TASK_AG_CTX_CF2_SHIFT                4
1242 #define E4_MSTORM_ISCSI_TASK_AG_CTX_TASK_CLEANUP_CF_EN_MASK  0x1 /* cf0en */
1243 #define E4_MSTORM_ISCSI_TASK_AG_CTX_TASK_CLEANUP_CF_EN_SHIFT 6
1244 #define E4_MSTORM_ISCSI_TASK_AG_CTX_CF1EN_MASK               0x1 /* cf1en */
1245 #define E4_MSTORM_ISCSI_TASK_AG_CTX_CF1EN_SHIFT              7
1246 	u8 flags2;
1247 #define E4_MSTORM_ISCSI_TASK_AG_CTX_CF2EN_MASK               0x1 /* cf2en */
1248 #define E4_MSTORM_ISCSI_TASK_AG_CTX_CF2EN_SHIFT              0
1249 #define E4_MSTORM_ISCSI_TASK_AG_CTX_RULE0EN_MASK             0x1 /* rule0en */
1250 #define E4_MSTORM_ISCSI_TASK_AG_CTX_RULE0EN_SHIFT            1
1251 #define E4_MSTORM_ISCSI_TASK_AG_CTX_RULE1EN_MASK             0x1 /* rule1en */
1252 #define E4_MSTORM_ISCSI_TASK_AG_CTX_RULE1EN_SHIFT            2
1253 #define E4_MSTORM_ISCSI_TASK_AG_CTX_RULE2EN_MASK             0x1 /* rule2en */
1254 #define E4_MSTORM_ISCSI_TASK_AG_CTX_RULE2EN_SHIFT            3
1255 #define E4_MSTORM_ISCSI_TASK_AG_CTX_RULE3EN_MASK             0x1 /* rule3en */
1256 #define E4_MSTORM_ISCSI_TASK_AG_CTX_RULE3EN_SHIFT            4
1257 #define E4_MSTORM_ISCSI_TASK_AG_CTX_RULE4EN_MASK             0x1 /* rule4en */
1258 #define E4_MSTORM_ISCSI_TASK_AG_CTX_RULE4EN_SHIFT            5
1259 #define E4_MSTORM_ISCSI_TASK_AG_CTX_RULE5EN_MASK             0x1 /* rule5en */
1260 #define E4_MSTORM_ISCSI_TASK_AG_CTX_RULE5EN_SHIFT            6
1261 #define E4_MSTORM_ISCSI_TASK_AG_CTX_RULE6EN_MASK             0x1 /* rule6en */
1262 #define E4_MSTORM_ISCSI_TASK_AG_CTX_RULE6EN_SHIFT            7
1263 	u8 byte2 /* byte2 */;
1264 	__le32 reg0 /* reg0 */;
1265 	u8 byte3 /* byte3 */;
1266 	u8 byte4 /* byte4 */;
1267 	__le16 word1 /* word1 */;
1268 };
1269 
1270 struct e4_ustorm_iscsi_task_ag_ctx
1271 {
1272 	u8 reserved /* cdu_validation */;
1273 	u8 state /* state */;
1274 	__le16 icid /* icid */;
1275 	u8 flags0;
1276 #define E4_USTORM_ISCSI_TASK_AG_CTX_CONNECTION_TYPE_MASK        0xF /* connection_type */
1277 #define E4_USTORM_ISCSI_TASK_AG_CTX_CONNECTION_TYPE_SHIFT       0
1278 #define E4_USTORM_ISCSI_TASK_AG_CTX_EXIST_IN_QM0_MASK           0x1 /* exist_in_qm0 */
1279 #define E4_USTORM_ISCSI_TASK_AG_CTX_EXIST_IN_QM0_SHIFT          4
1280 #define E4_USTORM_ISCSI_TASK_AG_CTX_BIT1_MASK                   0x1 /* exist_in_qm1 */
1281 #define E4_USTORM_ISCSI_TASK_AG_CTX_BIT1_SHIFT                  5
1282 #define E4_USTORM_ISCSI_TASK_AG_CTX_HQ_SCANNED_CF_MASK          0x3 /* timer0cf */
1283 #define E4_USTORM_ISCSI_TASK_AG_CTX_HQ_SCANNED_CF_SHIFT         6
1284 	u8 flags1;
1285 #define E4_USTORM_ISCSI_TASK_AG_CTX_RESERVED1_MASK              0x3 /* timer1cf */
1286 #define E4_USTORM_ISCSI_TASK_AG_CTX_RESERVED1_SHIFT             0
1287 #define E4_USTORM_ISCSI_TASK_AG_CTX_R2T2RECV_MASK               0x3 /* timer2cf */
1288 #define E4_USTORM_ISCSI_TASK_AG_CTX_R2T2RECV_SHIFT              2
1289 #define E4_USTORM_ISCSI_TASK_AG_CTX_CF3_MASK                    0x3 /* timer_stop_all */
1290 #define E4_USTORM_ISCSI_TASK_AG_CTX_CF3_SHIFT                   4
1291 #define E4_USTORM_ISCSI_TASK_AG_CTX_DIF_ERROR_CF_MASK           0x3 /* cf4 */
1292 #define E4_USTORM_ISCSI_TASK_AG_CTX_DIF_ERROR_CF_SHIFT          6
1293 	u8 flags2;
1294 #define E4_USTORM_ISCSI_TASK_AG_CTX_HQ_SCANNED_CF_EN_MASK       0x1 /* cf0en */
1295 #define E4_USTORM_ISCSI_TASK_AG_CTX_HQ_SCANNED_CF_EN_SHIFT      0
1296 #define E4_USTORM_ISCSI_TASK_AG_CTX_DISABLE_DATA_ACKED_MASK     0x1 /* cf1en */
1297 #define E4_USTORM_ISCSI_TASK_AG_CTX_DISABLE_DATA_ACKED_SHIFT    1
1298 #define E4_USTORM_ISCSI_TASK_AG_CTX_R2T2RECV_EN_MASK            0x1 /* cf2en */
1299 #define E4_USTORM_ISCSI_TASK_AG_CTX_R2T2RECV_EN_SHIFT           2
1300 #define E4_USTORM_ISCSI_TASK_AG_CTX_CF3EN_MASK                  0x1 /* cf3en */
1301 #define E4_USTORM_ISCSI_TASK_AG_CTX_CF3EN_SHIFT                 3
1302 #define E4_USTORM_ISCSI_TASK_AG_CTX_DIF_ERROR_CF_EN_MASK        0x1 /* cf4en */
1303 #define E4_USTORM_ISCSI_TASK_AG_CTX_DIF_ERROR_CF_EN_SHIFT       4
1304 #define E4_USTORM_ISCSI_TASK_AG_CTX_CMP_DATA_TOTAL_EXP_EN_MASK  0x1 /* rule0en */
1305 #define E4_USTORM_ISCSI_TASK_AG_CTX_CMP_DATA_TOTAL_EXP_EN_SHIFT 5
1306 #define E4_USTORM_ISCSI_TASK_AG_CTX_RULE1EN_MASK                0x1 /* rule1en */
1307 #define E4_USTORM_ISCSI_TASK_AG_CTX_RULE1EN_SHIFT               6
1308 #define E4_USTORM_ISCSI_TASK_AG_CTX_CMP_CONT_RCV_EXP_EN_MASK    0x1 /* rule2en */
1309 #define E4_USTORM_ISCSI_TASK_AG_CTX_CMP_CONT_RCV_EXP_EN_SHIFT   7
1310 	u8 flags3;
1311 #define E4_USTORM_ISCSI_TASK_AG_CTX_RULE3EN_MASK                0x1 /* rule3en */
1312 #define E4_USTORM_ISCSI_TASK_AG_CTX_RULE3EN_SHIFT               0
1313 #define E4_USTORM_ISCSI_TASK_AG_CTX_RULE4EN_MASK                0x1 /* rule4en */
1314 #define E4_USTORM_ISCSI_TASK_AG_CTX_RULE4EN_SHIFT               1
1315 #define E4_USTORM_ISCSI_TASK_AG_CTX_RULE5EN_MASK                0x1 /* rule5en */
1316 #define E4_USTORM_ISCSI_TASK_AG_CTX_RULE5EN_SHIFT               2
1317 #define E4_USTORM_ISCSI_TASK_AG_CTX_RULE6EN_MASK                0x1 /* rule6en */
1318 #define E4_USTORM_ISCSI_TASK_AG_CTX_RULE6EN_SHIFT               3
1319 #define E4_USTORM_ISCSI_TASK_AG_CTX_DIF_ERROR_TYPE_MASK         0xF /* nibble1 */
1320 #define E4_USTORM_ISCSI_TASK_AG_CTX_DIF_ERROR_TYPE_SHIFT        4
1321 	__le32 dif_err_intervals /* reg0 */;
1322 	__le32 dif_error_1st_interval /* reg1 */;
1323 	__le32 rcv_cont_len /* reg2 */;
1324 	__le32 exp_cont_len /* reg3 */;
1325 	__le32 total_data_acked /* reg4 */;
1326 	__le32 exp_data_acked /* reg5 */;
1327 	u8 next_tid_valid /* byte2 */;
1328 	u8 byte3 /* byte3 */;
1329 	__le16 word1 /* word1 */;
1330 	__le16 next_tid /* word2 */;
1331 	__le16 word3 /* word3 */;
1332 	__le32 hdr_residual_count /* reg6 */;
1333 	__le32 exp_r2t_sn /* reg7 */;
1334 };
1335 
1336 /*
1337  * The iscsi storm task context of Mstorm
1338  */
1339 struct mstorm_iscsi_task_st_ctx
1340 {
1341 	struct scsi_cached_sges data_desc /* Union of Data SGL / cached sge */;
1342 	struct scsi_sgl_params sgl_params;
1343 	__le32 rem_task_size /* Remaining task size, used for placement verification */;
1344 	__le32 data_buffer_offset /* Buffer offset */;
1345 	u8 task_type /* Task type, (use: iscsi_task_type enum) */;
1346 	struct iscsi_dif_flags dif_flags /* sizes of host/peer protection intervals + protection log interval */;
1347 	u8 reserved0[2] /* reserved0 */;
1348 	struct regpair sense_db /* Pointer to sense data buffer */;
1349 	__le32 expected_itt /* ITT - for target mode validations */;
1350 	__le32 reserved1 /* reserved1 */;
1351 };
1352 
1353 /*
1354  * The iscsi storm task context of Ustorm
1355  */
1356 struct ustorm_iscsi_task_st_ctx
1357 {
1358 	__le32 rem_rcv_len /* Remaining data to be received in bytes. Used in validations */;
1359 	__le32 exp_data_transfer_len /* iSCSI Initiator - The size of the transmitted task, iSCSI Target - the size of the Rx continuation */;
1360 	__le32 exp_data_sn /* Expected data SN */;
1361 	struct regpair lun /* LUN */;
1362 	struct iscsi_reg1 reg1;
1363 	u8 flags2;
1364 #define USTORM_ISCSI_TASK_ST_CTX_AHS_EXIST_MASK              0x1 /* Initiator Mode - Mark AHS exist */
1365 #define USTORM_ISCSI_TASK_ST_CTX_AHS_EXIST_SHIFT             0
1366 #define USTORM_ISCSI_TASK_ST_CTX_RESERVED1_MASK              0x7F
1367 #define USTORM_ISCSI_TASK_ST_CTX_RESERVED1_SHIFT             1
1368 	struct iscsi_dif_flags dif_flags /* Dif flags (written to R2T WQE) */;
1369 	__le16 reserved3;
1370 	__le32 reserved4;
1371 	__le32 reserved5;
1372 	__le32 reserved6;
1373 	__le32 reserved7;
1374 	u8 task_type /* Task Type */;
1375 	u8 error_flags;
1376 #define USTORM_ISCSI_TASK_ST_CTX_DATA_DIGEST_ERROR_MASK      0x1 /* Mark task with data digest error (1 bit) */
1377 #define USTORM_ISCSI_TASK_ST_CTX_DATA_DIGEST_ERROR_SHIFT     0
1378 #define USTORM_ISCSI_TASK_ST_CTX_DATA_TRUNCATED_ERROR_MASK   0x1 /* Target Mode - Mark middle task error, data truncated */
1379 #define USTORM_ISCSI_TASK_ST_CTX_DATA_TRUNCATED_ERROR_SHIFT  1
1380 #define USTORM_ISCSI_TASK_ST_CTX_UNDER_RUN_ERROR_MASK        0x1
1381 #define USTORM_ISCSI_TASK_ST_CTX_UNDER_RUN_ERROR_SHIFT       2
1382 #define USTORM_ISCSI_TASK_ST_CTX_RESERVED8_MASK              0x1F
1383 #define USTORM_ISCSI_TASK_ST_CTX_RESERVED8_SHIFT             3
1384 	u8 flags;
1385 #define USTORM_ISCSI_TASK_ST_CTX_CQE_WRITE_MASK              0x3 /* mark task cqe write (for cleanup flow) */
1386 #define USTORM_ISCSI_TASK_ST_CTX_CQE_WRITE_SHIFT             0
1387 #define USTORM_ISCSI_TASK_ST_CTX_LOCAL_COMP_MASK             0x1 /* local completion bit */
1388 #define USTORM_ISCSI_TASK_ST_CTX_LOCAL_COMP_SHIFT            2
1389 #define USTORM_ISCSI_TASK_ST_CTX_Q0_R2TQE_WRITE_MASK         0x1 /* write R2TQE from Q0 flow */
1390 #define USTORM_ISCSI_TASK_ST_CTX_Q0_R2TQE_WRITE_SHIFT        3
1391 #define USTORM_ISCSI_TASK_ST_CTX_TOTAL_DATA_ACKED_DONE_MASK  0x1 /* Mark total data acked or disabled */
1392 #define USTORM_ISCSI_TASK_ST_CTX_TOTAL_DATA_ACKED_DONE_SHIFT 4
1393 #define USTORM_ISCSI_TASK_ST_CTX_HQ_SCANNED_DONE_MASK        0x1 /* Mark HQ scanned or disabled */
1394 #define USTORM_ISCSI_TASK_ST_CTX_HQ_SCANNED_DONE_SHIFT       5
1395 #define USTORM_ISCSI_TASK_ST_CTX_R2T2RECV_DONE_MASK          0x1 /* Mark HQ scanned or disabled */
1396 #define USTORM_ISCSI_TASK_ST_CTX_R2T2RECV_DONE_SHIFT         6
1397 #define USTORM_ISCSI_TASK_ST_CTX_RESERVED0_MASK              0x1
1398 #define USTORM_ISCSI_TASK_ST_CTX_RESERVED0_SHIFT             7
1399 	u8 cq_rss_number /* Task CQ_RSS number 0.63 */;
1400 };
1401 
1402 /*
1403  * iscsi task context
1404  */
1405 struct iscsi_task_context
1406 {
1407 	struct ystorm_iscsi_task_st_ctx ystorm_st_context /* ystorm storm context */;
1408 	struct e4_ystorm_iscsi_task_ag_ctx ystorm_ag_context /* ystorm aggregative context */;
1409 	struct regpair ystorm_ag_padding[2] /* padding */;
1410 	struct tdif_task_context tdif_context /* tdif context */;
1411 	struct e4_mstorm_iscsi_task_ag_ctx mstorm_ag_context /* mstorm aggregative context */;
1412 	struct regpair mstorm_ag_padding[2] /* padding */;
1413 	struct e4_ustorm_iscsi_task_ag_ctx ustorm_ag_context /* ustorm aggregative context */;
1414 	struct mstorm_iscsi_task_st_ctx mstorm_st_context /* mstorm storm context */;
1415 	struct ustorm_iscsi_task_st_ctx ustorm_st_context /* ustorm storm context */;
1416 	struct rdif_task_context rdif_context /* rdif context */;
1417 };
1418 
1419 
1420 
1421 /*
1422  * iSCSI task type
1423  */
1424 enum iscsi_task_type
1425 {
1426 	ISCSI_TASK_TYPE_INITIATOR_WRITE,
1427 	ISCSI_TASK_TYPE_INITIATOR_READ,
1428 	ISCSI_TASK_TYPE_MIDPATH,
1429 	ISCSI_TASK_TYPE_UNSOLIC,
1430 	ISCSI_TASK_TYPE_EXCHCLEANUP,
1431 	ISCSI_TASK_TYPE_IRRELEVANT,
1432 	ISCSI_TASK_TYPE_TARGET_WRITE,
1433 	ISCSI_TASK_TYPE_TARGET_READ,
1434 	ISCSI_TASK_TYPE_TARGET_RESPONSE,
1435 	ISCSI_TASK_TYPE_LOGIN_RESPONSE,
1436 	MAX_ISCSI_TASK_TYPE
1437 };
1438 
1439 
1440 
1441 
1442 
1443 
1444 /*
1445  * iSCSI DesiredDataTransferLength/ttt union
1446  */
1447 union iscsi_ttt_txlen_union
1448 {
1449 	__le32 desired_tx_len /* desired data transfer length */;
1450 	__le32 ttt /* target transfer tag */;
1451 };
1452 
1453 
1454 /*
1455  * iSCSI uHQ element
1456  */
1457 struct iscsi_uhqe
1458 {
1459 	__le32 reg1;
1460 #define ISCSI_UHQE_PDU_PAYLOAD_LEN_MASK     0xFFFFF /* iSCSI payload (doesnt include padding or digest) or AHS length */
1461 #define ISCSI_UHQE_PDU_PAYLOAD_LEN_SHIFT    0
1462 #define ISCSI_UHQE_LOCAL_COMP_MASK          0x1 /* local compleiton flag */
1463 #define ISCSI_UHQE_LOCAL_COMP_SHIFT         20
1464 #define ISCSI_UHQE_TOGGLE_BIT_MASK          0x1 /* toggle bit to protect from uHQ full */
1465 #define ISCSI_UHQE_TOGGLE_BIT_SHIFT         21
1466 #define ISCSI_UHQE_PURE_PAYLOAD_MASK        0x1 /* indicates whether pdu_payload_len contains pure payload length. if not, pdu_payload_len is AHS length */
1467 #define ISCSI_UHQE_PURE_PAYLOAD_SHIFT       22
1468 #define ISCSI_UHQE_LOGIN_RESPONSE_PDU_MASK  0x1 /* indicates login pdu */
1469 #define ISCSI_UHQE_LOGIN_RESPONSE_PDU_SHIFT 23
1470 #define ISCSI_UHQE_TASK_ID_HI_MASK          0xFF /* most significant byte of task_id */
1471 #define ISCSI_UHQE_TASK_ID_HI_SHIFT         24
1472 	__le32 reg2;
1473 #define ISCSI_UHQE_BUFFER_OFFSET_MASK       0xFFFFFF /* absolute offset in task */
1474 #define ISCSI_UHQE_BUFFER_OFFSET_SHIFT      0
1475 #define ISCSI_UHQE_TASK_ID_LO_MASK          0xFF /* least significant byte of task_id */
1476 #define ISCSI_UHQE_TASK_ID_LO_SHIFT         24
1477 };
1478 
1479 
1480 /*
1481  * iSCSI WQ element
1482  */
1483 struct iscsi_wqe
1484 {
1485 	__le16 task_id /* The task identifier (itt) includes all the relevant information required for the task processing */;
1486 	u8 flags;
1487 #define ISCSI_WQE_WQE_TYPE_MASK  0x7 /* Wqe type [use iscsi_wqe_type] */
1488 #define ISCSI_WQE_WQE_TYPE_SHIFT 0
1489 #define ISCSI_WQE_NUM_SGES_MASK  0xF /* The driver will give a hint about sizes of SGEs for better credits evaluation at Xstorm */
1490 #define ISCSI_WQE_NUM_SGES_SHIFT 3
1491 #define ISCSI_WQE_RESPONSE_MASK  0x1 /* 1 if this Wqe triggers a response and advances stat_sn, 0 otherwise */
1492 #define ISCSI_WQE_RESPONSE_SHIFT 7
1493 	struct iscsi_dif_flags prot_flags /* Task data-integrity flags (protection) */;
1494 	__le32 contlen_cdbsize;
1495 #define ISCSI_WQE_CONT_LEN_MASK  0xFFFFFF /* expected/desired data transfer length */
1496 #define ISCSI_WQE_CONT_LEN_SHIFT 0
1497 #define ISCSI_WQE_CDB_SIZE_MASK  0xFF /* Initiator mode only: equals SCSI command CDB size if extended CDB is used, otherwise equals zero.  */
1498 #define ISCSI_WQE_CDB_SIZE_SHIFT 24
1499 };
1500 
1501 
1502 /*
1503  * iSCSI wqe type
1504  */
1505 enum iscsi_wqe_type
1506 {
1507 	ISCSI_WQE_TYPE_NORMAL /* iSCSI WQE type normal. excluding status bit in target mode. */,
1508 	ISCSI_WQE_TYPE_TASK_CLEANUP /* iSCSI WQE type task cleanup */,
1509 	ISCSI_WQE_TYPE_MIDDLE_PATH /* iSCSI WQE type middle path */,
1510 	ISCSI_WQE_TYPE_LOGIN /* iSCSI WQE type login */,
1511 	ISCSI_WQE_TYPE_FIRST_R2T_CONT /* iSCSI WQE type First Write Continuation (Target) */,
1512 	ISCSI_WQE_TYPE_NONFIRST_R2T_CONT /* iSCSI WQE type Non-First Write Continuation (Target) */,
1513 	ISCSI_WQE_TYPE_RESPONSE /* iSCSI WQE type SCSI response */,
1514 	MAX_ISCSI_WQE_TYPE
1515 };
1516 
1517 
1518 /*
1519  * iSCSI xHQ element
1520  */
1521 struct iscsi_xhqe
1522 {
1523 	union iscsi_ttt_txlen_union ttt_or_txlen /* iSCSI DesiredDataTransferLength/ttt union */;
1524 	__le32 exp_stat_sn /* expected StatSn */;
1525 	struct iscsi_dif_flags prot_flags /* Task data-integrity flags (protection) */;
1526 	u8 total_ahs_length /* Initiator mode only: Total AHS Length. greater than zero if and only if PDU is SCSI command and CDB > 16 */;
1527 	u8 opcode /* Type opcode for command PDU */;
1528 	u8 flags;
1529 #define ISCSI_XHQE_FINAL_MASK       0x1 /* The Final(F) for this PDU */
1530 #define ISCSI_XHQE_FINAL_SHIFT      0
1531 #define ISCSI_XHQE_STATUS_BIT_MASK  0x1 /* Whether this PDU is Data-In PDU with status_bit = 1 */
1532 #define ISCSI_XHQE_STATUS_BIT_SHIFT 1
1533 #define ISCSI_XHQE_NUM_SGES_MASK    0xF /* If Predicted IO equals Min(8, number of SGEs in SGL), otherwise equals 0 */
1534 #define ISCSI_XHQE_NUM_SGES_SHIFT   2
1535 #define ISCSI_XHQE_RESERVED0_MASK   0x3 /* reserved */
1536 #define ISCSI_XHQE_RESERVED0_SHIFT  6
1537 	union iscsi_seq_num seq_num /* R2T/DataSN sequence number */;
1538 	__le16 reserved1;
1539 };
1540 
1541 
1542 /*
1543  * Per PF iSCSI receive path statistics - mStorm RAM structure
1544  */
1545 struct mstorm_iscsi_stats_drv
1546 {
1547 	struct regpair iscsi_rx_dropped_PDUs_task_not_valid /* Number of Rx silently dropped PDUs due to task not valid */;
1548 };
1549 
1550 
1551 
1552 /*
1553  * Per PF iSCSI transmit path statistics - pStorm RAM structure
1554  */
1555 struct pstorm_iscsi_stats_drv
1556 {
1557 	struct regpair iscsi_tx_bytes_cnt /* Counts the number of tx bytes that were transmitted */;
1558 	struct regpair iscsi_tx_packet_cnt /* Counts the number of tx packets that were transmitted */;
1559 };
1560 
1561 
1562 /*
1563  * Per PF iSCSI receive path statistics - tStorm RAM structure
1564  */
1565 struct tstorm_iscsi_stats_drv
1566 {
1567 	struct regpair iscsi_rx_bytes_cnt /* Counts the number of rx bytes that were received */;
1568 	struct regpair iscsi_rx_packet_cnt /* Counts the number of rx packets that were received */;
1569 	struct regpair iscsi_rx_new_ooo_isle_events_cnt /* Counts the number of new out-of-order isle event */;
1570 	__le32 iscsi_cmdq_threshold_cnt /* Counts the number of times elements in cmdQ reached threshold */;
1571 	__le32 iscsi_rq_threshold_cnt /* Counts the number of times elements in RQQ reached threshold */;
1572 	__le32 iscsi_immq_threshold_cnt /* Counts the number of times elements in immQ reached threshold */;
1573 };
1574 
1575 
1576 /*
1577  * Per PF iSCSI receive path statistics - uStorm RAM structure
1578  */
1579 struct ustorm_iscsi_stats_drv
1580 {
1581 	struct regpair iscsi_rx_data_pdu_cnt /* Number of data PDUs that were received */;
1582 	struct regpair iscsi_rx_r2t_pdu_cnt /* Number of R2T PDUs that were received */;
1583 	struct regpair iscsi_rx_total_pdu_cnt /* Number of total PDUs that were received */;
1584 };
1585 
1586 
1587 
1588 /*
1589  * Per PF iSCSI transmit path statistics - xStorm RAM structure
1590  */
1591 struct xstorm_iscsi_stats_drv
1592 {
1593 	struct regpair iscsi_tx_go_to_slow_start_event_cnt /* Number of times slow start event occurred */;
1594 	struct regpair iscsi_tx_fast_retransmit_event_cnt /* Number of times fast retransmit event occurred */;
1595 };
1596 
1597 
1598 /*
1599  * Per PF iSCSI transmit path statistics - yStorm RAM structure
1600  */
1601 struct ystorm_iscsi_stats_drv
1602 {
1603 	struct regpair iscsi_tx_data_pdu_cnt /* Number of data PDUs that were transmitted */;
1604 	struct regpair iscsi_tx_r2t_pdu_cnt /* Number of R2T PDUs that were transmitted */;
1605 	struct regpair iscsi_tx_total_pdu_cnt /* Number of total PDUs that were transmitted */;
1606 };
1607 
1608 
1609 
1610 
1611 
1612 
1613 struct e4_tstorm_iscsi_task_ag_ctx
1614 {
1615 	u8 byte0 /* cdu_validation */;
1616 	u8 byte1 /* state */;
1617 	__le16 word0 /* icid */;
1618 	u8 flags0;
1619 #define E4_TSTORM_ISCSI_TASK_AG_CTX_NIBBLE0_MASK  0xF /* connection_type */
1620 #define E4_TSTORM_ISCSI_TASK_AG_CTX_NIBBLE0_SHIFT 0
1621 #define E4_TSTORM_ISCSI_TASK_AG_CTX_BIT0_MASK     0x1 /* exist_in_qm0 */
1622 #define E4_TSTORM_ISCSI_TASK_AG_CTX_BIT0_SHIFT    4
1623 #define E4_TSTORM_ISCSI_TASK_AG_CTX_BIT1_MASK     0x1 /* exist_in_qm1 */
1624 #define E4_TSTORM_ISCSI_TASK_AG_CTX_BIT1_SHIFT    5
1625 #define E4_TSTORM_ISCSI_TASK_AG_CTX_BIT2_MASK     0x1 /* bit2 */
1626 #define E4_TSTORM_ISCSI_TASK_AG_CTX_BIT2_SHIFT    6
1627 #define E4_TSTORM_ISCSI_TASK_AG_CTX_BIT3_MASK     0x1 /* bit3 */
1628 #define E4_TSTORM_ISCSI_TASK_AG_CTX_BIT3_SHIFT    7
1629 	u8 flags1;
1630 #define E4_TSTORM_ISCSI_TASK_AG_CTX_BIT4_MASK     0x1 /* bit4 */
1631 #define E4_TSTORM_ISCSI_TASK_AG_CTX_BIT4_SHIFT    0
1632 #define E4_TSTORM_ISCSI_TASK_AG_CTX_BIT5_MASK     0x1 /* bit5 */
1633 #define E4_TSTORM_ISCSI_TASK_AG_CTX_BIT5_SHIFT    1
1634 #define E4_TSTORM_ISCSI_TASK_AG_CTX_CF0_MASK      0x3 /* timer0cf */
1635 #define E4_TSTORM_ISCSI_TASK_AG_CTX_CF0_SHIFT     2
1636 #define E4_TSTORM_ISCSI_TASK_AG_CTX_CF1_MASK      0x3 /* timer1cf */
1637 #define E4_TSTORM_ISCSI_TASK_AG_CTX_CF1_SHIFT     4
1638 #define E4_TSTORM_ISCSI_TASK_AG_CTX_CF2_MASK      0x3 /* timer2cf */
1639 #define E4_TSTORM_ISCSI_TASK_AG_CTX_CF2_SHIFT     6
1640 	u8 flags2;
1641 #define E4_TSTORM_ISCSI_TASK_AG_CTX_CF3_MASK      0x3 /* timer_stop_all */
1642 #define E4_TSTORM_ISCSI_TASK_AG_CTX_CF3_SHIFT     0
1643 #define E4_TSTORM_ISCSI_TASK_AG_CTX_CF4_MASK      0x3 /* cf4 */
1644 #define E4_TSTORM_ISCSI_TASK_AG_CTX_CF4_SHIFT     2
1645 #define E4_TSTORM_ISCSI_TASK_AG_CTX_CF5_MASK      0x3 /* cf5 */
1646 #define E4_TSTORM_ISCSI_TASK_AG_CTX_CF5_SHIFT     4
1647 #define E4_TSTORM_ISCSI_TASK_AG_CTX_CF6_MASK      0x3 /* cf6 */
1648 #define E4_TSTORM_ISCSI_TASK_AG_CTX_CF6_SHIFT     6
1649 	u8 flags3;
1650 #define E4_TSTORM_ISCSI_TASK_AG_CTX_CF7_MASK      0x3 /* cf7 */
1651 #define E4_TSTORM_ISCSI_TASK_AG_CTX_CF7_SHIFT     0
1652 #define E4_TSTORM_ISCSI_TASK_AG_CTX_CF0EN_MASK    0x1 /* cf0en */
1653 #define E4_TSTORM_ISCSI_TASK_AG_CTX_CF0EN_SHIFT   2
1654 #define E4_TSTORM_ISCSI_TASK_AG_CTX_CF1EN_MASK    0x1 /* cf1en */
1655 #define E4_TSTORM_ISCSI_TASK_AG_CTX_CF1EN_SHIFT   3
1656 #define E4_TSTORM_ISCSI_TASK_AG_CTX_CF2EN_MASK    0x1 /* cf2en */
1657 #define E4_TSTORM_ISCSI_TASK_AG_CTX_CF2EN_SHIFT   4
1658 #define E4_TSTORM_ISCSI_TASK_AG_CTX_CF3EN_MASK    0x1 /* cf3en */
1659 #define E4_TSTORM_ISCSI_TASK_AG_CTX_CF3EN_SHIFT   5
1660 #define E4_TSTORM_ISCSI_TASK_AG_CTX_CF4EN_MASK    0x1 /* cf4en */
1661 #define E4_TSTORM_ISCSI_TASK_AG_CTX_CF4EN_SHIFT   6
1662 #define E4_TSTORM_ISCSI_TASK_AG_CTX_CF5EN_MASK    0x1 /* cf5en */
1663 #define E4_TSTORM_ISCSI_TASK_AG_CTX_CF5EN_SHIFT   7
1664 	u8 flags4;
1665 #define E4_TSTORM_ISCSI_TASK_AG_CTX_CF6EN_MASK    0x1 /* cf6en */
1666 #define E4_TSTORM_ISCSI_TASK_AG_CTX_CF6EN_SHIFT   0
1667 #define E4_TSTORM_ISCSI_TASK_AG_CTX_CF7EN_MASK    0x1 /* cf7en */
1668 #define E4_TSTORM_ISCSI_TASK_AG_CTX_CF7EN_SHIFT   1
1669 #define E4_TSTORM_ISCSI_TASK_AG_CTX_RULE0EN_MASK  0x1 /* rule0en */
1670 #define E4_TSTORM_ISCSI_TASK_AG_CTX_RULE0EN_SHIFT 2
1671 #define E4_TSTORM_ISCSI_TASK_AG_CTX_RULE1EN_MASK  0x1 /* rule1en */
1672 #define E4_TSTORM_ISCSI_TASK_AG_CTX_RULE1EN_SHIFT 3
1673 #define E4_TSTORM_ISCSI_TASK_AG_CTX_RULE2EN_MASK  0x1 /* rule2en */
1674 #define E4_TSTORM_ISCSI_TASK_AG_CTX_RULE2EN_SHIFT 4
1675 #define E4_TSTORM_ISCSI_TASK_AG_CTX_RULE3EN_MASK  0x1 /* rule3en */
1676 #define E4_TSTORM_ISCSI_TASK_AG_CTX_RULE3EN_SHIFT 5
1677 #define E4_TSTORM_ISCSI_TASK_AG_CTX_RULE4EN_MASK  0x1 /* rule4en */
1678 #define E4_TSTORM_ISCSI_TASK_AG_CTX_RULE4EN_SHIFT 6
1679 #define E4_TSTORM_ISCSI_TASK_AG_CTX_RULE5EN_MASK  0x1 /* rule5en */
1680 #define E4_TSTORM_ISCSI_TASK_AG_CTX_RULE5EN_SHIFT 7
1681 	u8 byte2 /* byte2 */;
1682 	__le16 word1 /* word1 */;
1683 	__le32 reg0 /* reg0 */;
1684 	u8 byte3 /* byte3 */;
1685 	u8 byte4 /* byte4 */;
1686 	__le16 word2 /* word2 */;
1687 	__le16 word3 /* word3 */;
1688 	__le16 word4 /* word4 */;
1689 	__le32 reg1 /* reg1 */;
1690 	__le32 reg2 /* reg2 */;
1691 };
1692 
1693 
1694 
1695 
1696 struct e5_mstorm_iscsi_task_ag_ctx
1697 {
1698 	u8 cdu_validation /* cdu_validation */;
1699 	u8 byte1 /* state_and_core_id */;
1700 	__le16 task_cid /* icid */;
1701 	u8 flags0;
1702 #define E5_MSTORM_ISCSI_TASK_AG_CTX_CONNECTION_TYPE_MASK     0xF /* connection_type */
1703 #define E5_MSTORM_ISCSI_TASK_AG_CTX_CONNECTION_TYPE_SHIFT    0
1704 #define E5_MSTORM_ISCSI_TASK_AG_CTX_EXIST_IN_QM0_MASK        0x1 /* exist_in_qm0 */
1705 #define E5_MSTORM_ISCSI_TASK_AG_CTX_EXIST_IN_QM0_SHIFT       4
1706 #define E5_MSTORM_ISCSI_TASK_AG_CTX_BIT1_MASK                0x1 /* exist_in_qm1 */
1707 #define E5_MSTORM_ISCSI_TASK_AG_CTX_BIT1_SHIFT               5
1708 #define E5_MSTORM_ISCSI_TASK_AG_CTX_VALID_MASK               0x1 /* bit2 */
1709 #define E5_MSTORM_ISCSI_TASK_AG_CTX_VALID_SHIFT              6
1710 #define E5_MSTORM_ISCSI_TASK_AG_CTX_TASK_CLEANUP_FLAG_MASK   0x1 /* bit3 */
1711 #define E5_MSTORM_ISCSI_TASK_AG_CTX_TASK_CLEANUP_FLAG_SHIFT  7
1712 	u8 flags1;
1713 #define E5_MSTORM_ISCSI_TASK_AG_CTX_TASK_CLEANUP_CF_MASK     0x3 /* cf0 */
1714 #define E5_MSTORM_ISCSI_TASK_AG_CTX_TASK_CLEANUP_CF_SHIFT    0
1715 #define E5_MSTORM_ISCSI_TASK_AG_CTX_CF1_MASK                 0x3 /* cf1 */
1716 #define E5_MSTORM_ISCSI_TASK_AG_CTX_CF1_SHIFT                2
1717 #define E5_MSTORM_ISCSI_TASK_AG_CTX_CF2_MASK                 0x3 /* cf2 */
1718 #define E5_MSTORM_ISCSI_TASK_AG_CTX_CF2_SHIFT                4
1719 #define E5_MSTORM_ISCSI_TASK_AG_CTX_TASK_CLEANUP_CF_EN_MASK  0x1 /* cf0en */
1720 #define E5_MSTORM_ISCSI_TASK_AG_CTX_TASK_CLEANUP_CF_EN_SHIFT 6
1721 #define E5_MSTORM_ISCSI_TASK_AG_CTX_CF1EN_MASK               0x1 /* cf1en */
1722 #define E5_MSTORM_ISCSI_TASK_AG_CTX_CF1EN_SHIFT              7
1723 	u8 flags2;
1724 #define E5_MSTORM_ISCSI_TASK_AG_CTX_CF2EN_MASK               0x1 /* cf2en */
1725 #define E5_MSTORM_ISCSI_TASK_AG_CTX_CF2EN_SHIFT              0
1726 #define E5_MSTORM_ISCSI_TASK_AG_CTX_RULE0EN_MASK             0x1 /* rule0en */
1727 #define E5_MSTORM_ISCSI_TASK_AG_CTX_RULE0EN_SHIFT            1
1728 #define E5_MSTORM_ISCSI_TASK_AG_CTX_RULE1EN_MASK             0x1 /* rule1en */
1729 #define E5_MSTORM_ISCSI_TASK_AG_CTX_RULE1EN_SHIFT            2
1730 #define E5_MSTORM_ISCSI_TASK_AG_CTX_RULE2EN_MASK             0x1 /* rule2en */
1731 #define E5_MSTORM_ISCSI_TASK_AG_CTX_RULE2EN_SHIFT            3
1732 #define E5_MSTORM_ISCSI_TASK_AG_CTX_RULE3EN_MASK             0x1 /* rule3en */
1733 #define E5_MSTORM_ISCSI_TASK_AG_CTX_RULE3EN_SHIFT            4
1734 #define E5_MSTORM_ISCSI_TASK_AG_CTX_RULE4EN_MASK             0x1 /* rule4en */
1735 #define E5_MSTORM_ISCSI_TASK_AG_CTX_RULE4EN_SHIFT            5
1736 #define E5_MSTORM_ISCSI_TASK_AG_CTX_RULE5EN_MASK             0x1 /* rule5en */
1737 #define E5_MSTORM_ISCSI_TASK_AG_CTX_RULE5EN_SHIFT            6
1738 #define E5_MSTORM_ISCSI_TASK_AG_CTX_RULE6EN_MASK             0x1 /* rule6en */
1739 #define E5_MSTORM_ISCSI_TASK_AG_CTX_RULE6EN_SHIFT            7
1740 	u8 flags3;
1741 #define E5_MSTORM_ISCSI_TASK_AG_CTX_E4_RESERVED1_MASK        0x1 /* bit4 */
1742 #define E5_MSTORM_ISCSI_TASK_AG_CTX_E4_RESERVED1_SHIFT       0
1743 #define E5_MSTORM_ISCSI_TASK_AG_CTX_E4_RESERVED2_MASK        0x3 /* cf3 */
1744 #define E5_MSTORM_ISCSI_TASK_AG_CTX_E4_RESERVED2_SHIFT       1
1745 #define E5_MSTORM_ISCSI_TASK_AG_CTX_E4_RESERVED3_MASK        0x3 /* cf4 */
1746 #define E5_MSTORM_ISCSI_TASK_AG_CTX_E4_RESERVED3_SHIFT       3
1747 #define E5_MSTORM_ISCSI_TASK_AG_CTX_E4_RESERVED4_MASK        0x1 /* cf3en */
1748 #define E5_MSTORM_ISCSI_TASK_AG_CTX_E4_RESERVED4_SHIFT       5
1749 #define E5_MSTORM_ISCSI_TASK_AG_CTX_E4_RESERVED5_MASK        0x1 /* cf4en */
1750 #define E5_MSTORM_ISCSI_TASK_AG_CTX_E4_RESERVED5_SHIFT       6
1751 #define E5_MSTORM_ISCSI_TASK_AG_CTX_E4_RESERVED6_MASK        0x1 /* rule7en */
1752 #define E5_MSTORM_ISCSI_TASK_AG_CTX_E4_RESERVED6_SHIFT       7
1753 	__le32 reg0 /* reg0 */;
1754 	u8 byte2 /* byte2 */;
1755 	u8 byte3 /* byte3 */;
1756 	u8 byte4 /* byte4 */;
1757 	u8 e4_reserved7 /* byte5 */;
1758 };
1759 
1760 
1761 struct e5_tstorm_iscsi_task_ag_ctx
1762 {
1763 	u8 byte0 /* cdu_validation */;
1764 	u8 byte1 /* state_and_core_id */;
1765 	__le16 word0 /* icid */;
1766 	u8 flags0;
1767 #define E5_TSTORM_ISCSI_TASK_AG_CTX_NIBBLE0_MASK  0xF /* connection_type */
1768 #define E5_TSTORM_ISCSI_TASK_AG_CTX_NIBBLE0_SHIFT 0
1769 #define E5_TSTORM_ISCSI_TASK_AG_CTX_BIT0_MASK     0x1 /* exist_in_qm0 */
1770 #define E5_TSTORM_ISCSI_TASK_AG_CTX_BIT0_SHIFT    4
1771 #define E5_TSTORM_ISCSI_TASK_AG_CTX_BIT1_MASK     0x1 /* exist_in_qm1 */
1772 #define E5_TSTORM_ISCSI_TASK_AG_CTX_BIT1_SHIFT    5
1773 #define E5_TSTORM_ISCSI_TASK_AG_CTX_BIT2_MASK     0x1 /* bit2 */
1774 #define E5_TSTORM_ISCSI_TASK_AG_CTX_BIT2_SHIFT    6
1775 #define E5_TSTORM_ISCSI_TASK_AG_CTX_BIT3_MASK     0x1 /* bit3 */
1776 #define E5_TSTORM_ISCSI_TASK_AG_CTX_BIT3_SHIFT    7
1777 	u8 flags1;
1778 #define E5_TSTORM_ISCSI_TASK_AG_CTX_BIT4_MASK     0x1 /* bit4 */
1779 #define E5_TSTORM_ISCSI_TASK_AG_CTX_BIT4_SHIFT    0
1780 #define E5_TSTORM_ISCSI_TASK_AG_CTX_BIT5_MASK     0x1 /* bit5 */
1781 #define E5_TSTORM_ISCSI_TASK_AG_CTX_BIT5_SHIFT    1
1782 #define E5_TSTORM_ISCSI_TASK_AG_CTX_CF0_MASK      0x3 /* timer0cf */
1783 #define E5_TSTORM_ISCSI_TASK_AG_CTX_CF0_SHIFT     2
1784 #define E5_TSTORM_ISCSI_TASK_AG_CTX_CF1_MASK      0x3 /* timer1cf */
1785 #define E5_TSTORM_ISCSI_TASK_AG_CTX_CF1_SHIFT     4
1786 #define E5_TSTORM_ISCSI_TASK_AG_CTX_CF2_MASK      0x3 /* timer2cf */
1787 #define E5_TSTORM_ISCSI_TASK_AG_CTX_CF2_SHIFT     6
1788 	u8 flags2;
1789 #define E5_TSTORM_ISCSI_TASK_AG_CTX_CF3_MASK      0x3 /* timer_stop_all */
1790 #define E5_TSTORM_ISCSI_TASK_AG_CTX_CF3_SHIFT     0
1791 #define E5_TSTORM_ISCSI_TASK_AG_CTX_CF4_MASK      0x3 /* cf4 */
1792 #define E5_TSTORM_ISCSI_TASK_AG_CTX_CF4_SHIFT     2
1793 #define E5_TSTORM_ISCSI_TASK_AG_CTX_CF5_MASK      0x3 /* cf5 */
1794 #define E5_TSTORM_ISCSI_TASK_AG_CTX_CF5_SHIFT     4
1795 #define E5_TSTORM_ISCSI_TASK_AG_CTX_CF6_MASK      0x3 /* cf6 */
1796 #define E5_TSTORM_ISCSI_TASK_AG_CTX_CF6_SHIFT     6
1797 	u8 flags3;
1798 #define E5_TSTORM_ISCSI_TASK_AG_CTX_CF7_MASK      0x3 /* cf7 */
1799 #define E5_TSTORM_ISCSI_TASK_AG_CTX_CF7_SHIFT     0
1800 #define E5_TSTORM_ISCSI_TASK_AG_CTX_CF0EN_MASK    0x1 /* cf0en */
1801 #define E5_TSTORM_ISCSI_TASK_AG_CTX_CF0EN_SHIFT   2
1802 #define E5_TSTORM_ISCSI_TASK_AG_CTX_CF1EN_MASK    0x1 /* cf1en */
1803 #define E5_TSTORM_ISCSI_TASK_AG_CTX_CF1EN_SHIFT   3
1804 #define E5_TSTORM_ISCSI_TASK_AG_CTX_CF2EN_MASK    0x1 /* cf2en */
1805 #define E5_TSTORM_ISCSI_TASK_AG_CTX_CF2EN_SHIFT   4
1806 #define E5_TSTORM_ISCSI_TASK_AG_CTX_CF3EN_MASK    0x1 /* cf3en */
1807 #define E5_TSTORM_ISCSI_TASK_AG_CTX_CF3EN_SHIFT   5
1808 #define E5_TSTORM_ISCSI_TASK_AG_CTX_CF4EN_MASK    0x1 /* cf4en */
1809 #define E5_TSTORM_ISCSI_TASK_AG_CTX_CF4EN_SHIFT   6
1810 #define E5_TSTORM_ISCSI_TASK_AG_CTX_CF5EN_MASK    0x1 /* cf5en */
1811 #define E5_TSTORM_ISCSI_TASK_AG_CTX_CF5EN_SHIFT   7
1812 	u8 flags4;
1813 #define E5_TSTORM_ISCSI_TASK_AG_CTX_CF6EN_MASK    0x1 /* cf6en */
1814 #define E5_TSTORM_ISCSI_TASK_AG_CTX_CF6EN_SHIFT   0
1815 #define E5_TSTORM_ISCSI_TASK_AG_CTX_CF7EN_MASK    0x1 /* cf7en */
1816 #define E5_TSTORM_ISCSI_TASK_AG_CTX_CF7EN_SHIFT   1
1817 #define E5_TSTORM_ISCSI_TASK_AG_CTX_RULE0EN_MASK  0x1 /* rule0en */
1818 #define E5_TSTORM_ISCSI_TASK_AG_CTX_RULE0EN_SHIFT 2
1819 #define E5_TSTORM_ISCSI_TASK_AG_CTX_RULE1EN_MASK  0x1 /* rule1en */
1820 #define E5_TSTORM_ISCSI_TASK_AG_CTX_RULE1EN_SHIFT 3
1821 #define E5_TSTORM_ISCSI_TASK_AG_CTX_RULE2EN_MASK  0x1 /* rule2en */
1822 #define E5_TSTORM_ISCSI_TASK_AG_CTX_RULE2EN_SHIFT 4
1823 #define E5_TSTORM_ISCSI_TASK_AG_CTX_RULE3EN_MASK  0x1 /* rule3en */
1824 #define E5_TSTORM_ISCSI_TASK_AG_CTX_RULE3EN_SHIFT 5
1825 #define E5_TSTORM_ISCSI_TASK_AG_CTX_RULE4EN_MASK  0x1 /* rule4en */
1826 #define E5_TSTORM_ISCSI_TASK_AG_CTX_RULE4EN_SHIFT 6
1827 #define E5_TSTORM_ISCSI_TASK_AG_CTX_RULE5EN_MASK  0x1 /* rule5en */
1828 #define E5_TSTORM_ISCSI_TASK_AG_CTX_RULE5EN_SHIFT 7
1829 	u8 byte2 /* byte2 */;
1830 	__le16 word1 /* word1 */;
1831 	__le32 reg0 /* reg0 */;
1832 	u8 byte3 /* regpair0 */;
1833 	u8 byte4 /* byte4 */;
1834 	__le16 word2 /* word2 */;
1835 	__le16 word3 /* word3 */;
1836 	__le16 word4 /* word4 */;
1837 	__le32 reg1 /* regpair1 */;
1838 	__le32 reg2 /* reg2 */;
1839 };
1840 
1841 
1842 struct e5_ustorm_iscsi_task_ag_ctx
1843 {
1844 	u8 reserved /* cdu_validation */;
1845 	u8 state_and_core_id /* state_and_core_id */;
1846 	__le16 icid /* icid */;
1847 	u8 flags0;
1848 #define E5_USTORM_ISCSI_TASK_AG_CTX_CONNECTION_TYPE_MASK        0xF /* connection_type */
1849 #define E5_USTORM_ISCSI_TASK_AG_CTX_CONNECTION_TYPE_SHIFT       0
1850 #define E5_USTORM_ISCSI_TASK_AG_CTX_EXIST_IN_QM0_MASK           0x1 /* exist_in_qm0 */
1851 #define E5_USTORM_ISCSI_TASK_AG_CTX_EXIST_IN_QM0_SHIFT          4
1852 #define E5_USTORM_ISCSI_TASK_AG_CTX_BIT1_MASK                   0x1 /* exist_in_qm1 */
1853 #define E5_USTORM_ISCSI_TASK_AG_CTX_BIT1_SHIFT                  5
1854 #define E5_USTORM_ISCSI_TASK_AG_CTX_HQ_SCANNED_CF_MASK          0x3 /* timer0cf */
1855 #define E5_USTORM_ISCSI_TASK_AG_CTX_HQ_SCANNED_CF_SHIFT         6
1856 	u8 flags1;
1857 #define E5_USTORM_ISCSI_TASK_AG_CTX_RESERVED1_MASK              0x3 /* timer1cf */
1858 #define E5_USTORM_ISCSI_TASK_AG_CTX_RESERVED1_SHIFT             0
1859 #define E5_USTORM_ISCSI_TASK_AG_CTX_R2T2RECV_MASK               0x3 /* timer2cf */
1860 #define E5_USTORM_ISCSI_TASK_AG_CTX_R2T2RECV_SHIFT              2
1861 #define E5_USTORM_ISCSI_TASK_AG_CTX_CF3_MASK                    0x3 /* timer_stop_all */
1862 #define E5_USTORM_ISCSI_TASK_AG_CTX_CF3_SHIFT                   4
1863 #define E5_USTORM_ISCSI_TASK_AG_CTX_DIF_ERROR_CF_MASK           0x3 /* dif_error_cf */
1864 #define E5_USTORM_ISCSI_TASK_AG_CTX_DIF_ERROR_CF_SHIFT          6
1865 	u8 flags2;
1866 #define E5_USTORM_ISCSI_TASK_AG_CTX_HQ_SCANNED_CF_EN_MASK       0x1 /* cf0en */
1867 #define E5_USTORM_ISCSI_TASK_AG_CTX_HQ_SCANNED_CF_EN_SHIFT      0
1868 #define E5_USTORM_ISCSI_TASK_AG_CTX_DISABLE_DATA_ACKED_MASK     0x1 /* cf1en */
1869 #define E5_USTORM_ISCSI_TASK_AG_CTX_DISABLE_DATA_ACKED_SHIFT    1
1870 #define E5_USTORM_ISCSI_TASK_AG_CTX_R2T2RECV_EN_MASK            0x1 /* cf2en */
1871 #define E5_USTORM_ISCSI_TASK_AG_CTX_R2T2RECV_EN_SHIFT           2
1872 #define E5_USTORM_ISCSI_TASK_AG_CTX_CF3EN_MASK                  0x1 /* cf3en */
1873 #define E5_USTORM_ISCSI_TASK_AG_CTX_CF3EN_SHIFT                 3
1874 #define E5_USTORM_ISCSI_TASK_AG_CTX_DIF_ERROR_CF_EN_MASK        0x1 /* cf4en */
1875 #define E5_USTORM_ISCSI_TASK_AG_CTX_DIF_ERROR_CF_EN_SHIFT       4
1876 #define E5_USTORM_ISCSI_TASK_AG_CTX_CMP_DATA_TOTAL_EXP_EN_MASK  0x1 /* rule0en */
1877 #define E5_USTORM_ISCSI_TASK_AG_CTX_CMP_DATA_TOTAL_EXP_EN_SHIFT 5
1878 #define E5_USTORM_ISCSI_TASK_AG_CTX_RULE1EN_MASK                0x1 /* rule1en */
1879 #define E5_USTORM_ISCSI_TASK_AG_CTX_RULE1EN_SHIFT               6
1880 #define E5_USTORM_ISCSI_TASK_AG_CTX_CMP_CONT_RCV_EXP_EN_MASK    0x1 /* rule2en */
1881 #define E5_USTORM_ISCSI_TASK_AG_CTX_CMP_CONT_RCV_EXP_EN_SHIFT   7
1882 	u8 flags3;
1883 #define E5_USTORM_ISCSI_TASK_AG_CTX_RULE3EN_MASK                0x1 /* rule3en */
1884 #define E5_USTORM_ISCSI_TASK_AG_CTX_RULE3EN_SHIFT               0
1885 #define E5_USTORM_ISCSI_TASK_AG_CTX_RULE4EN_MASK                0x1 /* rule4en */
1886 #define E5_USTORM_ISCSI_TASK_AG_CTX_RULE4EN_SHIFT               1
1887 #define E5_USTORM_ISCSI_TASK_AG_CTX_RULE5EN_MASK                0x1 /* rule5en */
1888 #define E5_USTORM_ISCSI_TASK_AG_CTX_RULE5EN_SHIFT               2
1889 #define E5_USTORM_ISCSI_TASK_AG_CTX_RULE6EN_MASK                0x1 /* rule6en */
1890 #define E5_USTORM_ISCSI_TASK_AG_CTX_RULE6EN_SHIFT               3
1891 #define E5_USTORM_ISCSI_TASK_AG_CTX_E4_RESERVED1_MASK           0x1 /* bit2 */
1892 #define E5_USTORM_ISCSI_TASK_AG_CTX_E4_RESERVED1_SHIFT          4
1893 #define E5_USTORM_ISCSI_TASK_AG_CTX_E4_RESERVED2_MASK           0x1 /* bit3 */
1894 #define E5_USTORM_ISCSI_TASK_AG_CTX_E4_RESERVED2_SHIFT          5
1895 #define E5_USTORM_ISCSI_TASK_AG_CTX_E4_RESERVED3_MASK           0x1 /* bit4 */
1896 #define E5_USTORM_ISCSI_TASK_AG_CTX_E4_RESERVED3_SHIFT          6
1897 #define E5_USTORM_ISCSI_TASK_AG_CTX_E4_RESERVED4_MASK           0x1 /* rule7en */
1898 #define E5_USTORM_ISCSI_TASK_AG_CTX_E4_RESERVED4_SHIFT          7
1899 	u8 flags4;
1900 #define E5_USTORM_ISCSI_TASK_AG_CTX_E4_RESERVED5_MASK           0x3 /* cf5 */
1901 #define E5_USTORM_ISCSI_TASK_AG_CTX_E4_RESERVED5_SHIFT          0
1902 #define E5_USTORM_ISCSI_TASK_AG_CTX_E4_RESERVED6_MASK           0x1 /* cf5en */
1903 #define E5_USTORM_ISCSI_TASK_AG_CTX_E4_RESERVED6_SHIFT          2
1904 #define E5_USTORM_ISCSI_TASK_AG_CTX_E4_RESERVED7_MASK           0x1 /* rule8en */
1905 #define E5_USTORM_ISCSI_TASK_AG_CTX_E4_RESERVED7_SHIFT          3
1906 #define E5_USTORM_ISCSI_TASK_AG_CTX_DIF_ERROR_TYPE_MASK         0xF /* dif_error_type */
1907 #define E5_USTORM_ISCSI_TASK_AG_CTX_DIF_ERROR_TYPE_SHIFT        4
1908 	u8 next_tid_valid /* byte2 */;
1909 	u8 byte3 /* byte3 */;
1910 	u8 e4_reserved8 /* byte4 */;
1911 	__le32 dif_err_intervals /* dif_err_intervals */;
1912 	__le32 dif_error_1st_interval /* dif_error_1st_interval */;
1913 	__le32 rcv_cont_len /* reg2 */;
1914 	__le32 exp_cont_len /* reg3 */;
1915 	__le32 total_data_acked /* reg4 */;
1916 	__le32 exp_data_acked /* reg5 */;
1917 	__le16 word1 /* word1 */;
1918 	__le16 next_tid /* word2 */;
1919 	__le32 hdr_residual_count /* reg6 */;
1920 	__le32 exp_r2t_sn /* reg7 */;
1921 };
1922 
1923 
1924 struct e5_ystorm_iscsi_task_ag_ctx
1925 {
1926 	u8 reserved /* cdu_validation */;
1927 	u8 byte1 /* state_and_core_id */;
1928 	__le16 word0 /* icid */;
1929 	u8 flags0;
1930 #define E5_YSTORM_ISCSI_TASK_AG_CTX_NIBBLE0_MASK       0xF /* connection_type */
1931 #define E5_YSTORM_ISCSI_TASK_AG_CTX_NIBBLE0_SHIFT      0
1932 #define E5_YSTORM_ISCSI_TASK_AG_CTX_BIT0_MASK          0x1 /* exist_in_qm0 */
1933 #define E5_YSTORM_ISCSI_TASK_AG_CTX_BIT0_SHIFT         4
1934 #define E5_YSTORM_ISCSI_TASK_AG_CTX_BIT1_MASK          0x1 /* exist_in_qm1 */
1935 #define E5_YSTORM_ISCSI_TASK_AG_CTX_BIT1_SHIFT         5
1936 #define E5_YSTORM_ISCSI_TASK_AG_CTX_VALID_MASK         0x1 /* bit2 */
1937 #define E5_YSTORM_ISCSI_TASK_AG_CTX_VALID_SHIFT        6
1938 #define E5_YSTORM_ISCSI_TASK_AG_CTX_BIT3_MASK          0x1 /* bit3 */
1939 #define E5_YSTORM_ISCSI_TASK_AG_CTX_BIT3_SHIFT         7
1940 	u8 flags1;
1941 #define E5_YSTORM_ISCSI_TASK_AG_CTX_CF0_MASK           0x3 /* cf0 */
1942 #define E5_YSTORM_ISCSI_TASK_AG_CTX_CF0_SHIFT          0
1943 #define E5_YSTORM_ISCSI_TASK_AG_CTX_CF1_MASK           0x3 /* cf1 */
1944 #define E5_YSTORM_ISCSI_TASK_AG_CTX_CF1_SHIFT          2
1945 #define E5_YSTORM_ISCSI_TASK_AG_CTX_CF2SPECIAL_MASK    0x3 /* cf2special */
1946 #define E5_YSTORM_ISCSI_TASK_AG_CTX_CF2SPECIAL_SHIFT   4
1947 #define E5_YSTORM_ISCSI_TASK_AG_CTX_CF0EN_MASK         0x1 /* cf0en */
1948 #define E5_YSTORM_ISCSI_TASK_AG_CTX_CF0EN_SHIFT        6
1949 #define E5_YSTORM_ISCSI_TASK_AG_CTX_CF1EN_MASK         0x1 /* cf1en */
1950 #define E5_YSTORM_ISCSI_TASK_AG_CTX_CF1EN_SHIFT        7
1951 	u8 flags2;
1952 #define E5_YSTORM_ISCSI_TASK_AG_CTX_BIT4_MASK          0x1 /* bit4 */
1953 #define E5_YSTORM_ISCSI_TASK_AG_CTX_BIT4_SHIFT         0
1954 #define E5_YSTORM_ISCSI_TASK_AG_CTX_RULE0EN_MASK       0x1 /* rule0en */
1955 #define E5_YSTORM_ISCSI_TASK_AG_CTX_RULE0EN_SHIFT      1
1956 #define E5_YSTORM_ISCSI_TASK_AG_CTX_RULE1EN_MASK       0x1 /* rule1en */
1957 #define E5_YSTORM_ISCSI_TASK_AG_CTX_RULE1EN_SHIFT      2
1958 #define E5_YSTORM_ISCSI_TASK_AG_CTX_RULE2EN_MASK       0x1 /* rule2en */
1959 #define E5_YSTORM_ISCSI_TASK_AG_CTX_RULE2EN_SHIFT      3
1960 #define E5_YSTORM_ISCSI_TASK_AG_CTX_RULE3EN_MASK       0x1 /* rule3en */
1961 #define E5_YSTORM_ISCSI_TASK_AG_CTX_RULE3EN_SHIFT      4
1962 #define E5_YSTORM_ISCSI_TASK_AG_CTX_RULE4EN_MASK       0x1 /* rule4en */
1963 #define E5_YSTORM_ISCSI_TASK_AG_CTX_RULE4EN_SHIFT      5
1964 #define E5_YSTORM_ISCSI_TASK_AG_CTX_RULE5EN_MASK       0x1 /* rule5en */
1965 #define E5_YSTORM_ISCSI_TASK_AG_CTX_RULE5EN_SHIFT      6
1966 #define E5_YSTORM_ISCSI_TASK_AG_CTX_RULE6EN_MASK       0x1 /* rule6en */
1967 #define E5_YSTORM_ISCSI_TASK_AG_CTX_RULE6EN_SHIFT      7
1968 	u8 flags3;
1969 #define E5_YSTORM_ISCSI_TASK_AG_CTX_E4_RESERVED1_MASK  0x1 /* bit5 */
1970 #define E5_YSTORM_ISCSI_TASK_AG_CTX_E4_RESERVED1_SHIFT 0
1971 #define E5_YSTORM_ISCSI_TASK_AG_CTX_E4_RESERVED2_MASK  0x3 /* cf3 */
1972 #define E5_YSTORM_ISCSI_TASK_AG_CTX_E4_RESERVED2_SHIFT 1
1973 #define E5_YSTORM_ISCSI_TASK_AG_CTX_E4_RESERVED3_MASK  0x3 /* cf4 */
1974 #define E5_YSTORM_ISCSI_TASK_AG_CTX_E4_RESERVED3_SHIFT 3
1975 #define E5_YSTORM_ISCSI_TASK_AG_CTX_E4_RESERVED4_MASK  0x1 /* cf3en */
1976 #define E5_YSTORM_ISCSI_TASK_AG_CTX_E4_RESERVED4_SHIFT 5
1977 #define E5_YSTORM_ISCSI_TASK_AG_CTX_E4_RESERVED5_MASK  0x1 /* cf4en */
1978 #define E5_YSTORM_ISCSI_TASK_AG_CTX_E4_RESERVED5_SHIFT 6
1979 #define E5_YSTORM_ISCSI_TASK_AG_CTX_E4_RESERVED6_MASK  0x1 /* rule7en */
1980 #define E5_YSTORM_ISCSI_TASK_AG_CTX_E4_RESERVED6_SHIFT 7
1981 	__le32 TTT /* reg0 */;
1982 	u8 byte2 /* byte2 */;
1983 	u8 byte3 /* byte3 */;
1984 	u8 byte4 /* byte4 */;
1985 	u8 e4_reserved7 /* byte5 */;
1986 };
1987 
1988 
1989 /*
1990  * iSCSI doorbell data
1991  */
1992 struct iscsi_db_data
1993 {
1994 	u8 params;
1995 #define ISCSI_DB_DATA_DEST_MASK         0x3 /* destination of doorbell (use enum db_dest) */
1996 #define ISCSI_DB_DATA_DEST_SHIFT        0
1997 #define ISCSI_DB_DATA_AGG_CMD_MASK      0x3 /* aggregative command to CM (use enum db_agg_cmd_sel) */
1998 #define ISCSI_DB_DATA_AGG_CMD_SHIFT     2
1999 #define ISCSI_DB_DATA_BYPASS_EN_MASK    0x1 /* enable QM bypass */
2000 #define ISCSI_DB_DATA_BYPASS_EN_SHIFT   4
2001 #define ISCSI_DB_DATA_RESERVED_MASK     0x1
2002 #define ISCSI_DB_DATA_RESERVED_SHIFT    5
2003 #define ISCSI_DB_DATA_AGG_VAL_SEL_MASK  0x3 /* aggregative value selection */
2004 #define ISCSI_DB_DATA_AGG_VAL_SEL_SHIFT 6
2005 	u8 agg_flags /* bit for every DQ counter flags in CM context that DQ can increment */;
2006 	__le16 sq_prod;
2007 };
2008 
2009 #endif /* __ISCSI_COMMON__ */
2010