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1// SPDX-License-Identifier: GPL-2.0-only
2/* QLogic iSCSI Offload Driver
3 * Copyright (c) 2016 Cavium Inc.
4 */
5
6#include <linux/types.h>
7#include <asm/byteorder.h>
8#include "qedi_hsi.h"
9#include <linux/qed/qed_if.h>
10
11#include "qedi_fw_iscsi.h"
12#include "qedi_fw_scsi.h"
13
14#define SCSI_NUM_SGES_IN_CACHE 0x4
15
16static bool scsi_is_slow_sgl(u16 num_sges, bool small_mid_sge)
17{
18 return (num_sges > SCSI_NUM_SGES_SLOW_SGL_THR && small_mid_sge);
19}
20
21static
22void init_scsi_sgl_context(struct scsi_sgl_params *ctx_sgl_params,
23 struct scsi_cached_sges *ctx_data_desc,
24 struct scsi_sgl_task_params *sgl_task_params)
25{
26 u8 sge_index;
27 u8 num_sges;
28 u32 val;
29
30 num_sges = (sgl_task_params->num_sges > SCSI_NUM_SGES_IN_CACHE) ?
31 SCSI_NUM_SGES_IN_CACHE : sgl_task_params->num_sges;
32
33 /* sgl params */
34 val = cpu_to_le32(sgl_task_params->sgl_phys_addr.lo);
35 ctx_sgl_params->sgl_addr.lo = val;
36 val = cpu_to_le32(sgl_task_params->sgl_phys_addr.hi);
37 ctx_sgl_params->sgl_addr.hi = val;
38 val = cpu_to_le32(sgl_task_params->total_buffer_size);
39 ctx_sgl_params->sgl_total_length = val;
40 ctx_sgl_params->sgl_num_sges = cpu_to_le16(sgl_task_params->num_sges);
41
42 for (sge_index = 0; sge_index < num_sges; sge_index++) {
43 val = cpu_to_le32(sgl_task_params->sgl[sge_index].sge_addr.lo);
44 ctx_data_desc->sge[sge_index].sge_addr.lo = val;
45 val = cpu_to_le32(sgl_task_params->sgl[sge_index].sge_addr.hi);
46 ctx_data_desc->sge[sge_index].sge_addr.hi = val;
47 val = cpu_to_le32(sgl_task_params->sgl[sge_index].sge_len);
48 ctx_data_desc->sge[sge_index].sge_len = val;
49 }
50}
51
52static u32 calc_rw_task_size(struct iscsi_task_params *task_params,
53 enum iscsi_task_type task_type,
54 struct scsi_sgl_task_params *sgl_task_params,
55 struct scsi_dif_task_params *dif_task_params)
56{
57 u32 io_size;
58
59 if (task_type == ISCSI_TASK_TYPE_INITIATOR_WRITE ||
60 task_type == ISCSI_TASK_TYPE_TARGET_READ)
61 io_size = task_params->tx_io_size;
62 else
63 io_size = task_params->rx_io_size;
64
65 if (!io_size)
66 return 0;
67
68 if (!dif_task_params)
69 return io_size;
70
71 return !dif_task_params->dif_on_network ?
72 io_size : sgl_task_params->total_buffer_size;
73}
74
75static void
76init_dif_context_flags(struct iscsi_dif_flags *ctx_dif_flags,
77 struct scsi_dif_task_params *dif_task_params)
78{
79 if (!dif_task_params)
80 return;
81
82 SET_FIELD(ctx_dif_flags->flags, ISCSI_DIF_FLAGS_PROT_INTERVAL_SIZE_LOG,
83 dif_task_params->dif_block_size_log);
84 SET_FIELD(ctx_dif_flags->flags, ISCSI_DIF_FLAGS_DIF_TO_PEER,
85 dif_task_params->dif_on_network ? 1 : 0);
86 SET_FIELD(ctx_dif_flags->flags, ISCSI_DIF_FLAGS_HOST_INTERFACE,
87 dif_task_params->dif_on_host ? 1 : 0);
88}
89
90static void init_sqe(struct iscsi_task_params *task_params,
91 struct scsi_sgl_task_params *sgl_task_params,
92 struct scsi_dif_task_params *dif_task_params,
93 struct iscsi_common_hdr *pdu_header,
94 struct scsi_initiator_cmd_params *cmd_params,
95 enum iscsi_task_type task_type,
96 bool is_cleanup)
97{
98 if (!task_params->sqe)
99 return;
100
101 memset(task_params->sqe, 0, sizeof(*task_params->sqe));
102 task_params->sqe->task_id = cpu_to_le16(task_params->itid);
103 if (is_cleanup) {
104 SET_FIELD(task_params->sqe->flags, ISCSI_WQE_WQE_TYPE,
105 ISCSI_WQE_TYPE_TASK_CLEANUP);
106 return;
107 }
108
109 switch (task_type) {
110 case ISCSI_TASK_TYPE_INITIATOR_WRITE:
111 {
112 u32 buf_size = 0;
113 u32 num_sges = 0;
114
115 init_dif_context_flags(&task_params->sqe->prot_flags,
116 dif_task_params);
117
118 SET_FIELD(task_params->sqe->flags, ISCSI_WQE_WQE_TYPE,
119 ISCSI_WQE_TYPE_NORMAL);
120
121 if (task_params->tx_io_size) {
122 buf_size = calc_rw_task_size(task_params, task_type,
123 sgl_task_params,
124 dif_task_params);
125
126 if (scsi_is_slow_sgl(sgl_task_params->num_sges,
127 sgl_task_params->small_mid_sge))
128 num_sges = ISCSI_WQE_NUM_SGES_SLOWIO;
129 else
130 num_sges = min(sgl_task_params->num_sges,
131 (u16)SCSI_NUM_SGES_SLOW_SGL_THR);
132 }
133
134 SET_FIELD(task_params->sqe->flags, ISCSI_WQE_NUM_SGES,
135 num_sges);
136 SET_FIELD(task_params->sqe->contlen_cdbsize, ISCSI_WQE_CONT_LEN,
137 buf_size);
138
139 if (GET_FIELD(pdu_header->hdr_second_dword,
140 ISCSI_CMD_HDR_TOTAL_AHS_LEN))
141 SET_FIELD(task_params->sqe->contlen_cdbsize,
142 ISCSI_WQE_CDB_SIZE,
143 cmd_params->extended_cdb_sge.sge_len);
144 }
145 break;
146 case ISCSI_TASK_TYPE_INITIATOR_READ:
147 SET_FIELD(task_params->sqe->flags, ISCSI_WQE_WQE_TYPE,
148 ISCSI_WQE_TYPE_NORMAL);
149
150 if (GET_FIELD(pdu_header->hdr_second_dword,
151 ISCSI_CMD_HDR_TOTAL_AHS_LEN))
152 SET_FIELD(task_params->sqe->contlen_cdbsize,
153 ISCSI_WQE_CDB_SIZE,
154 cmd_params->extended_cdb_sge.sge_len);
155 break;
156 case ISCSI_TASK_TYPE_LOGIN_RESPONSE:
157 case ISCSI_TASK_TYPE_MIDPATH:
158 {
159 bool advance_statsn = true;
160
161 if (task_type == ISCSI_TASK_TYPE_LOGIN_RESPONSE)
162 SET_FIELD(task_params->sqe->flags, ISCSI_WQE_WQE_TYPE,
163 ISCSI_WQE_TYPE_LOGIN);
164 else
165 SET_FIELD(task_params->sqe->flags, ISCSI_WQE_WQE_TYPE,
166 ISCSI_WQE_TYPE_MIDDLE_PATH);
167
168 if (task_type == ISCSI_TASK_TYPE_MIDPATH) {
169 u8 opcode = GET_FIELD(pdu_header->hdr_first_byte,
170 ISCSI_COMMON_HDR_OPCODE);
171
172 if (opcode != ISCSI_OPCODE_TEXT_RESPONSE &&
173 (opcode != ISCSI_OPCODE_NOP_IN ||
174 pdu_header->itt == ISCSI_TTT_ALL_ONES))
175 advance_statsn = false;
176 }
177
178 SET_FIELD(task_params->sqe->flags, ISCSI_WQE_RESPONSE,
179 advance_statsn ? 1 : 0);
180
181 if (task_params->tx_io_size) {
182 SET_FIELD(task_params->sqe->contlen_cdbsize,
183 ISCSI_WQE_CONT_LEN, task_params->tx_io_size);
184
185 if (scsi_is_slow_sgl(sgl_task_params->num_sges,
186 sgl_task_params->small_mid_sge))
187 SET_FIELD(task_params->sqe->flags, ISCSI_WQE_NUM_SGES,
188 ISCSI_WQE_NUM_SGES_SLOWIO);
189 else
190 SET_FIELD(task_params->sqe->flags, ISCSI_WQE_NUM_SGES,
191 min(sgl_task_params->num_sges,
192 (u16)SCSI_NUM_SGES_SLOW_SGL_THR));
193 }
194 }
195 break;
196 default:
197 break;
198 }
199}
200
201static void init_default_iscsi_task(struct iscsi_task_params *task_params,
202 struct data_hdr *pdu_header,
203 enum iscsi_task_type task_type)
204{
205 struct iscsi_task_context *context;
206 u32 val;
207 u16 index;
208 u8 val_byte;
209
210 context = task_params->context;
211 val_byte = context->mstorm_ag_context.cdu_validation;
212 memset(context, 0, sizeof(*context));
213 context->mstorm_ag_context.cdu_validation = val_byte;
214
215 for (index = 0; index <
216 ARRAY_SIZE(context->ystorm_st_context.pdu_hdr.data.data);
217 index++) {
218 val = cpu_to_le32(pdu_header->data[index]);
219 context->ystorm_st_context.pdu_hdr.data.data[index] = val;
220 }
221
222 context->mstorm_st_context.task_type = task_type;
223 context->mstorm_ag_context.task_cid =
224 cpu_to_le16(task_params->conn_icid);
225
226 SET_FIELD(context->ustorm_ag_context.flags1,
227 USTORM_ISCSI_TASK_AG_CTX_R2T2RECV, 1);
228
229 context->ustorm_st_context.task_type = task_type;
230 context->ustorm_st_context.cq_rss_number = task_params->cq_rss_number;
231 context->ustorm_ag_context.icid = cpu_to_le16(task_params->conn_icid);
232}
233
234static
235void init_initiator_rw_cdb_ystorm_context(struct ystorm_iscsi_task_st_ctx *ystc,
236 struct scsi_initiator_cmd_params *cmd)
237{
238 union iscsi_task_hdr *ctx_pdu_hdr = &ystc->pdu_hdr;
239 u32 val;
240
241 if (!cmd->extended_cdb_sge.sge_len)
242 return;
243
244 SET_FIELD(ctx_pdu_hdr->ext_cdb_cmd.hdr_second_dword,
245 ISCSI_EXT_CDB_CMD_HDR_CDB_SIZE,
246 cmd->extended_cdb_sge.sge_len);
247 val = cpu_to_le32(cmd->extended_cdb_sge.sge_addr.lo);
248 ctx_pdu_hdr->ext_cdb_cmd.cdb_sge.sge_addr.lo = val;
249 val = cpu_to_le32(cmd->extended_cdb_sge.sge_addr.hi);
250 ctx_pdu_hdr->ext_cdb_cmd.cdb_sge.sge_addr.hi = val;
251 val = cpu_to_le32(cmd->extended_cdb_sge.sge_len);
252 ctx_pdu_hdr->ext_cdb_cmd.cdb_sge.sge_len = val;
253}
254
255static
256void init_ustorm_task_contexts(struct ustorm_iscsi_task_st_ctx *ustorm_st_cxt,
257 struct ustorm_iscsi_task_ag_ctx *ustorm_ag_cxt,
258 u32 remaining_recv_len, u32 expected_data_transfer_len,
259 u8 num_sges, bool tx_dif_conn_err_en)
260{
261 u32 val;
262
263 ustorm_st_cxt->rem_rcv_len = cpu_to_le32(remaining_recv_len);
264 ustorm_ag_cxt->exp_data_acked = cpu_to_le32(expected_data_transfer_len);
265 val = cpu_to_le32(expected_data_transfer_len);
266 ustorm_st_cxt->exp_data_transfer_len = val;
267 SET_FIELD(ustorm_st_cxt->reg1.reg1_map, ISCSI_REG1_NUM_SGES, num_sges);
268 SET_FIELD(ustorm_ag_cxt->flags2,
269 USTORM_ISCSI_TASK_AG_CTX_DIF_ERROR_CF_EN,
270 tx_dif_conn_err_en ? 1 : 0);
271}
272
273static
274void set_rw_exp_data_acked_and_cont_len(struct iscsi_task_context *context,
275 struct iscsi_conn_params *conn_params,
276 enum iscsi_task_type task_type,
277 u32 task_size,
278 u32 exp_data_transfer_len,
279 u8 total_ahs_length)
280{
281 u32 max_unsolicited_data = 0, val;
282
283 if (total_ahs_length &&
284 (task_type == ISCSI_TASK_TYPE_INITIATOR_WRITE ||
285 task_type == ISCSI_TASK_TYPE_INITIATOR_READ))
286 SET_FIELD(context->ustorm_st_context.flags2,
287 USTORM_ISCSI_TASK_ST_CTX_AHS_EXIST, 1);
288
289 switch (task_type) {
290 case ISCSI_TASK_TYPE_INITIATOR_WRITE:
291 if (!conn_params->initial_r2t)
292 max_unsolicited_data = conn_params->first_burst_length;
293 else if (conn_params->immediate_data)
294 max_unsolicited_data =
295 min(conn_params->first_burst_length,
296 conn_params->max_send_pdu_length);
297
298 context->ustorm_ag_context.exp_data_acked =
299 cpu_to_le32(total_ahs_length == 0 ?
300 min(exp_data_transfer_len,
301 max_unsolicited_data) :
302 ((u32)(total_ahs_length +
303 ISCSI_AHS_CNTL_SIZE)));
304 break;
305 case ISCSI_TASK_TYPE_TARGET_READ:
306 val = cpu_to_le32(exp_data_transfer_len);
307 context->ustorm_ag_context.exp_data_acked = val;
308 break;
309 case ISCSI_TASK_TYPE_INITIATOR_READ:
310 context->ustorm_ag_context.exp_data_acked =
311 cpu_to_le32((total_ahs_length == 0 ? 0 :
312 total_ahs_length +
313 ISCSI_AHS_CNTL_SIZE));
314 break;
315 case ISCSI_TASK_TYPE_TARGET_WRITE:
316 val = cpu_to_le32(task_size);
317 context->ustorm_ag_context.exp_cont_len = val;
318 break;
319 default:
320 break;
321 }
322}
323
324static
325void init_rtdif_task_context(struct rdif_task_context *rdif_context,
326 struct tdif_task_context *tdif_context,
327 struct scsi_dif_task_params *dif_task_params,
328 enum iscsi_task_type task_type)
329{
330 u32 val;
331
332 if (!dif_task_params->dif_on_network || !dif_task_params->dif_on_host)
333 return;
334
335 if (task_type == ISCSI_TASK_TYPE_TARGET_WRITE ||
336 task_type == ISCSI_TASK_TYPE_INITIATOR_READ) {
337 rdif_context->app_tag_value =
338 cpu_to_le16(dif_task_params->application_tag);
339 rdif_context->partial_crc_value = cpu_to_le16(0xffff);
340 val = cpu_to_le32(dif_task_params->initial_ref_tag);
341 rdif_context->initial_ref_tag = val;
342 rdif_context->app_tag_mask =
343 cpu_to_le16(dif_task_params->application_tag_mask);
344 SET_FIELD(rdif_context->flags0, RDIF_TASK_CONTEXT_CRC_SEED,
345 dif_task_params->crc_seed ? 1 : 0);
346 SET_FIELD(rdif_context->flags0,
347 RDIF_TASK_CONTEXT_HOST_GUARD_TYPE,
348 dif_task_params->host_guard_type);
349 SET_FIELD(rdif_context->flags0,
350 RDIF_TASK_CONTEXT_PROTECTION_TYPE,
351 dif_task_params->protection_type);
352 SET_FIELD(rdif_context->flags0,
353 RDIF_TASK_CONTEXT_INITIAL_REF_TAG_VALID, 1);
354 SET_FIELD(rdif_context->flags0,
355 RDIF_TASK_CONTEXT_KEEP_REF_TAG_CONST,
356 dif_task_params->keep_ref_tag_const ? 1 : 0);
357 SET_FIELD(rdif_context->flags1,
358 RDIF_TASK_CONTEXT_VALIDATE_APP_TAG,
359 (dif_task_params->validate_app_tag &&
360 dif_task_params->dif_on_network) ? 1 : 0);
361 SET_FIELD(rdif_context->flags1,
362 RDIF_TASK_CONTEXT_VALIDATE_GUARD,
363 (dif_task_params->validate_guard &&
364 dif_task_params->dif_on_network) ? 1 : 0);
365 SET_FIELD(rdif_context->flags1,
366 RDIF_TASK_CONTEXT_VALIDATE_REF_TAG,
367 (dif_task_params->validate_ref_tag &&
368 dif_task_params->dif_on_network) ? 1 : 0);
369 SET_FIELD(rdif_context->flags1,
370 RDIF_TASK_CONTEXT_HOST_INTERFACE,
371 dif_task_params->dif_on_host ? 1 : 0);
372 SET_FIELD(rdif_context->flags1,
373 RDIF_TASK_CONTEXT_NETWORK_INTERFACE,
374 dif_task_params->dif_on_network ? 1 : 0);
375 SET_FIELD(rdif_context->flags1,
376 RDIF_TASK_CONTEXT_FORWARD_GUARD,
377 dif_task_params->forward_guard ? 1 : 0);
378 SET_FIELD(rdif_context->flags1,
379 RDIF_TASK_CONTEXT_FORWARD_APP_TAG,
380 dif_task_params->forward_app_tag ? 1 : 0);
381 SET_FIELD(rdif_context->flags1,
382 RDIF_TASK_CONTEXT_FORWARD_REF_TAG,
383 dif_task_params->forward_ref_tag ? 1 : 0);
384 SET_FIELD(rdif_context->flags1,
385 RDIF_TASK_CONTEXT_FORWARD_APP_TAG_WITH_MASK,
386 dif_task_params->forward_app_tag_with_mask ? 1 : 0);
387 SET_FIELD(rdif_context->flags1,
388 RDIF_TASK_CONTEXT_FORWARD_REF_TAG_WITH_MASK,
389 dif_task_params->forward_ref_tag_with_mask ? 1 : 0);
390 SET_FIELD(rdif_context->flags1,
391 RDIF_TASK_CONTEXT_INTERVAL_SIZE,
392 dif_task_params->dif_block_size_log - 9);
393 SET_FIELD(rdif_context->state,
394 RDIF_TASK_CONTEXT_REF_TAG_MASK,
395 dif_task_params->ref_tag_mask);
396 SET_FIELD(rdif_context->state, RDIF_TASK_CONTEXT_IGNORE_APP_TAG,
397 dif_task_params->ignore_app_tag);
398 }
399
400 if (task_type == ISCSI_TASK_TYPE_TARGET_READ ||
401 task_type == ISCSI_TASK_TYPE_INITIATOR_WRITE) {
402 tdif_context->app_tag_value =
403 cpu_to_le16(dif_task_params->application_tag);
404 tdif_context->partial_crc_value_b =
405 cpu_to_le16(dif_task_params->crc_seed ? 0xffff : 0x0000);
406 tdif_context->partial_crc_value_a =
407 cpu_to_le16(dif_task_params->crc_seed ? 0xffff : 0x0000);
408 SET_FIELD(tdif_context->flags0, TDIF_TASK_CONTEXT_CRC_SEED,
409 dif_task_params->crc_seed ? 1 : 0);
410
411 SET_FIELD(tdif_context->flags0,
412 TDIF_TASK_CONTEXT_SET_ERROR_WITH_EOP,
413 dif_task_params->tx_dif_conn_err_en ? 1 : 0);
414 SET_FIELD(tdif_context->flags1, TDIF_TASK_CONTEXT_FORWARD_GUARD,
415 dif_task_params->forward_guard ? 1 : 0);
416 SET_FIELD(tdif_context->flags1,
417 TDIF_TASK_CONTEXT_FORWARD_APP_TAG,
418 dif_task_params->forward_app_tag ? 1 : 0);
419 SET_FIELD(tdif_context->flags1,
420 TDIF_TASK_CONTEXT_FORWARD_REF_TAG,
421 dif_task_params->forward_ref_tag ? 1 : 0);
422 SET_FIELD(tdif_context->flags1, TDIF_TASK_CONTEXT_INTERVAL_SIZE,
423 dif_task_params->dif_block_size_log - 9);
424 SET_FIELD(tdif_context->flags1,
425 TDIF_TASK_CONTEXT_HOST_INTERFACE,
426 dif_task_params->dif_on_host ? 1 : 0);
427 SET_FIELD(tdif_context->flags1,
428 TDIF_TASK_CONTEXT_NETWORK_INTERFACE,
429 dif_task_params->dif_on_network ? 1 : 0);
430 val = cpu_to_le32(dif_task_params->initial_ref_tag);
431 tdif_context->initial_ref_tag = val;
432 tdif_context->app_tag_mask =
433 cpu_to_le16(dif_task_params->application_tag_mask);
434 SET_FIELD(tdif_context->flags0,
435 TDIF_TASK_CONTEXT_HOST_GUARD_TYPE,
436 dif_task_params->host_guard_type);
437 SET_FIELD(tdif_context->flags0,
438 TDIF_TASK_CONTEXT_PROTECTION_TYPE,
439 dif_task_params->protection_type);
440 SET_FIELD(tdif_context->flags0,
441 TDIF_TASK_CONTEXT_INITIAL_REF_TAG_VALID,
442 dif_task_params->initial_ref_tag_is_valid ? 1 : 0);
443 SET_FIELD(tdif_context->flags0,
444 TDIF_TASK_CONTEXT_KEEP_REF_TAG_CONST,
445 dif_task_params->keep_ref_tag_const ? 1 : 0);
446 SET_FIELD(tdif_context->flags1,
447 TDIF_TASK_CONTEXT_VALIDATE_GUARD,
448 (dif_task_params->validate_guard &&
449 dif_task_params->dif_on_host) ? 1 : 0);
450 SET_FIELD(tdif_context->flags1,
451 TDIF_TASK_CONTEXT_VALIDATE_APP_TAG,
452 (dif_task_params->validate_app_tag &&
453 dif_task_params->dif_on_host) ? 1 : 0);
454 SET_FIELD(tdif_context->flags1,
455 TDIF_TASK_CONTEXT_VALIDATE_REF_TAG,
456 (dif_task_params->validate_ref_tag &&
457 dif_task_params->dif_on_host) ? 1 : 0);
458 SET_FIELD(tdif_context->flags1,
459 TDIF_TASK_CONTEXT_FORWARD_APP_TAG_WITH_MASK,
460 dif_task_params->forward_app_tag_with_mask ? 1 : 0);
461 SET_FIELD(tdif_context->flags1,
462 TDIF_TASK_CONTEXT_FORWARD_REF_TAG_WITH_MASK,
463 dif_task_params->forward_ref_tag_with_mask ? 1 : 0);
464 SET_FIELD(tdif_context->flags1,
465 TDIF_TASK_CONTEXT_REF_TAG_MASK,
466 dif_task_params->ref_tag_mask);
467 SET_FIELD(tdif_context->flags0,
468 TDIF_TASK_CONTEXT_IGNORE_APP_TAG,
469 dif_task_params->ignore_app_tag ? 1 : 0);
470 }
471}
472
473static void set_local_completion_context(struct iscsi_task_context *context)
474{
475 SET_FIELD(context->ystorm_st_context.state.flags,
476 YSTORM_ISCSI_TASK_STATE_LOCAL_COMP, 1);
477 SET_FIELD(context->ustorm_st_context.flags,
478 USTORM_ISCSI_TASK_ST_CTX_LOCAL_COMP, 1);
479}
480
481static int init_rw_iscsi_task(struct iscsi_task_params *task_params,
482 enum iscsi_task_type task_type,
483 struct iscsi_conn_params *conn_params,
484 struct iscsi_common_hdr *pdu_header,
485 struct scsi_sgl_task_params *sgl_task_params,
486 struct scsi_initiator_cmd_params *cmd_params,
487 struct scsi_dif_task_params *dif_task_params)
488{
489 u32 exp_data_transfer_len = conn_params->max_burst_length;
490 struct iscsi_task_context *cxt;
491 bool slow_io = false;
492 u32 task_size, val;
493 u8 num_sges = 0;
494
495 task_size = calc_rw_task_size(task_params, task_type, sgl_task_params,
496 dif_task_params);
497
498 init_default_iscsi_task(task_params, (struct data_hdr *)pdu_header,
499 task_type);
500
501 cxt = task_params->context;
502
503
504 if (task_type == ISCSI_TASK_TYPE_TARGET_READ) {
505 set_local_completion_context(cxt);
506 } else if (task_type == ISCSI_TASK_TYPE_TARGET_WRITE) {
507 val = cpu_to_le32(task_size +
508 ((struct iscsi_r2t_hdr *)pdu_header)->buffer_offset);
509 cxt->ystorm_st_context.pdu_hdr.r2t.desired_data_trns_len = val;
510 cxt->mstorm_st_context.expected_itt =
511 cpu_to_le32(pdu_header->itt);
512 } else {
513 val = cpu_to_le32(task_size);
514 cxt->ystorm_st_context.pdu_hdr.cmd.expected_transfer_length =
515 val;
516 init_initiator_rw_cdb_ystorm_context(&cxt->ystorm_st_context,
517 cmd_params);
518 val = cpu_to_le32(cmd_params->sense_data_buffer_phys_addr.lo);
519 cxt->mstorm_st_context.sense_db.lo = val;
520
521 val = cpu_to_le32(cmd_params->sense_data_buffer_phys_addr.hi);
522 cxt->mstorm_st_context.sense_db.hi = val;
523 }
524
525 if (task_params->tx_io_size) {
526 init_dif_context_flags(&cxt->ystorm_st_context.state.dif_flags,
527 dif_task_params);
528 init_dif_context_flags(&cxt->ustorm_st_context.dif_flags,
529 dif_task_params);
530 init_scsi_sgl_context(&cxt->ystorm_st_context.state.sgl_params,
531 &cxt->ystorm_st_context.state.data_desc,
532 sgl_task_params);
533
534 slow_io = scsi_is_slow_sgl(sgl_task_params->num_sges,
535 sgl_task_params->small_mid_sge);
536
537 num_sges = !slow_io ? min_t(u16, sgl_task_params->num_sges,
538 (u16)SCSI_NUM_SGES_SLOW_SGL_THR) :
539 ISCSI_WQE_NUM_SGES_SLOWIO;
540
541 if (slow_io) {
542 SET_FIELD(cxt->ystorm_st_context.state.flags,
543 YSTORM_ISCSI_TASK_STATE_SLOW_IO, 1);
544 }
545 } else if (task_params->rx_io_size) {
546 init_dif_context_flags(&cxt->mstorm_st_context.dif_flags,
547 dif_task_params);
548 init_scsi_sgl_context(&cxt->mstorm_st_context.sgl_params,
549 &cxt->mstorm_st_context.data_desc,
550 sgl_task_params);
551 num_sges = !scsi_is_slow_sgl(sgl_task_params->num_sges,
552 sgl_task_params->small_mid_sge) ?
553 min_t(u16, sgl_task_params->num_sges,
554 (u16)SCSI_NUM_SGES_SLOW_SGL_THR) :
555 ISCSI_WQE_NUM_SGES_SLOWIO;
556 cxt->mstorm_st_context.rem_task_size = cpu_to_le32(task_size);
557 }
558
559 if (exp_data_transfer_len > task_size ||
560 task_type != ISCSI_TASK_TYPE_TARGET_WRITE)
561 exp_data_transfer_len = task_size;
562
563 init_ustorm_task_contexts(&task_params->context->ustorm_st_context,
564 &task_params->context->ustorm_ag_context,
565 task_size, exp_data_transfer_len, num_sges,
566 dif_task_params ?
567 dif_task_params->tx_dif_conn_err_en : false);
568
569 set_rw_exp_data_acked_and_cont_len(task_params->context, conn_params,
570 task_type, task_size,
571 exp_data_transfer_len,
572 GET_FIELD(pdu_header->hdr_second_dword,
573 ISCSI_CMD_HDR_TOTAL_AHS_LEN));
574
575 if (dif_task_params)
576 init_rtdif_task_context(&task_params->context->rdif_context,
577 &task_params->context->tdif_context,
578 dif_task_params, task_type);
579
580 init_sqe(task_params, sgl_task_params, dif_task_params, pdu_header,
581 cmd_params, task_type, false);
582
583 return 0;
584}
585
586int init_initiator_rw_iscsi_task(struct iscsi_task_params *task_params,
587 struct iscsi_conn_params *conn_params,
588 struct scsi_initiator_cmd_params *cmd_params,
589 struct iscsi_cmd_hdr *cmd_header,
590 struct scsi_sgl_task_params *tx_sgl_params,
591 struct scsi_sgl_task_params *rx_sgl_params,
592 struct scsi_dif_task_params *dif_task_params)
593{
594 if (GET_FIELD(cmd_header->flags_attr, ISCSI_CMD_HDR_WRITE))
595 return init_rw_iscsi_task(task_params,
596 ISCSI_TASK_TYPE_INITIATOR_WRITE,
597 conn_params,
598 (struct iscsi_common_hdr *)cmd_header,
599 tx_sgl_params, cmd_params,
600 dif_task_params);
601 else if (GET_FIELD(cmd_header->flags_attr, ISCSI_CMD_HDR_READ) ||
602 (task_params->rx_io_size == 0 && task_params->tx_io_size == 0))
603 return init_rw_iscsi_task(task_params,
604 ISCSI_TASK_TYPE_INITIATOR_READ,
605 conn_params,
606 (struct iscsi_common_hdr *)cmd_header,
607 rx_sgl_params, cmd_params,
608 dif_task_params);
609 else
610 return -1;
611}
612
613int init_initiator_login_request_task(struct iscsi_task_params *task_params,
614 struct iscsi_login_req_hdr *login_header,
615 struct scsi_sgl_task_params *tx_params,
616 struct scsi_sgl_task_params *rx_params)
617{
618 struct iscsi_task_context *cxt;
619
620 cxt = task_params->context;
621
622 init_default_iscsi_task(task_params,
623 (struct data_hdr *)login_header,
624 ISCSI_TASK_TYPE_MIDPATH);
625
626 init_ustorm_task_contexts(&cxt->ustorm_st_context,
627 &cxt->ustorm_ag_context,
628 task_params->rx_io_size ?
629 rx_params->total_buffer_size : 0,
630 task_params->tx_io_size ?
631 tx_params->total_buffer_size : 0, 0,
632 0);
633
634 if (task_params->tx_io_size)
635 init_scsi_sgl_context(&cxt->ystorm_st_context.state.sgl_params,
636 &cxt->ystorm_st_context.state.data_desc,
637 tx_params);
638
639 if (task_params->rx_io_size)
640 init_scsi_sgl_context(&cxt->mstorm_st_context.sgl_params,
641 &cxt->mstorm_st_context.data_desc,
642 rx_params);
643
644 cxt->mstorm_st_context.rem_task_size =
645 cpu_to_le32(task_params->rx_io_size ?
646 rx_params->total_buffer_size : 0);
647
648 init_sqe(task_params, tx_params, NULL,
649 (struct iscsi_common_hdr *)login_header, NULL,
650 ISCSI_TASK_TYPE_MIDPATH, false);
651
652 return 0;
653}
654
655int init_initiator_nop_out_task(struct iscsi_task_params *task_params,
656 struct iscsi_nop_out_hdr *nop_out_pdu_header,
657 struct scsi_sgl_task_params *tx_sgl_task_params,
658 struct scsi_sgl_task_params *rx_sgl_task_params)
659{
660 struct iscsi_task_context *cxt;
661
662 cxt = task_params->context;
663
664 init_default_iscsi_task(task_params,
665 (struct data_hdr *)nop_out_pdu_header,
666 ISCSI_TASK_TYPE_MIDPATH);
667
668 if (nop_out_pdu_header->itt == ISCSI_ITT_ALL_ONES)
669 set_local_completion_context(task_params->context);
670
671 if (task_params->tx_io_size)
672 init_scsi_sgl_context(&cxt->ystorm_st_context.state.sgl_params,
673 &cxt->ystorm_st_context.state.data_desc,
674 tx_sgl_task_params);
675
676 if (task_params->rx_io_size)
677 init_scsi_sgl_context(&cxt->mstorm_st_context.sgl_params,
678 &cxt->mstorm_st_context.data_desc,
679 rx_sgl_task_params);
680
681 init_ustorm_task_contexts(&cxt->ustorm_st_context,
682 &cxt->ustorm_ag_context,
683 task_params->rx_io_size ?
684 rx_sgl_task_params->total_buffer_size : 0,
685 task_params->tx_io_size ?
686 tx_sgl_task_params->total_buffer_size : 0,
687 0, 0);
688
689 cxt->mstorm_st_context.rem_task_size =
690 cpu_to_le32(task_params->rx_io_size ?
691 rx_sgl_task_params->total_buffer_size :
692 0);
693
694 init_sqe(task_params, tx_sgl_task_params, NULL,
695 (struct iscsi_common_hdr *)nop_out_pdu_header, NULL,
696 ISCSI_TASK_TYPE_MIDPATH, false);
697
698 return 0;
699}
700
701int init_initiator_logout_request_task(struct iscsi_task_params *task_params,
702 struct iscsi_logout_req_hdr *logout_hdr,
703 struct scsi_sgl_task_params *tx_params,
704 struct scsi_sgl_task_params *rx_params)
705{
706 struct iscsi_task_context *cxt;
707
708 cxt = task_params->context;
709
710 init_default_iscsi_task(task_params,
711 (struct data_hdr *)logout_hdr,
712 ISCSI_TASK_TYPE_MIDPATH);
713
714 if (task_params->tx_io_size)
715 init_scsi_sgl_context(&cxt->ystorm_st_context.state.sgl_params,
716 &cxt->ystorm_st_context.state.data_desc,
717 tx_params);
718
719 if (task_params->rx_io_size)
720 init_scsi_sgl_context(&cxt->mstorm_st_context.sgl_params,
721 &cxt->mstorm_st_context.data_desc,
722 rx_params);
723
724 init_ustorm_task_contexts(&cxt->ustorm_st_context,
725 &cxt->ustorm_ag_context,
726 task_params->rx_io_size ?
727 rx_params->total_buffer_size : 0,
728 task_params->tx_io_size ?
729 tx_params->total_buffer_size : 0,
730 0, 0);
731
732 cxt->mstorm_st_context.rem_task_size =
733 cpu_to_le32(task_params->rx_io_size ?
734 rx_params->total_buffer_size : 0);
735
736 init_sqe(task_params, tx_params, NULL,
737 (struct iscsi_common_hdr *)logout_hdr, NULL,
738 ISCSI_TASK_TYPE_MIDPATH, false);
739
740 return 0;
741}
742
743int init_initiator_tmf_request_task(struct iscsi_task_params *task_params,
744 struct iscsi_tmf_request_hdr *tmf_header)
745{
746 init_default_iscsi_task(task_params, (struct data_hdr *)tmf_header,
747 ISCSI_TASK_TYPE_MIDPATH);
748
749 init_sqe(task_params, NULL, NULL,
750 (struct iscsi_common_hdr *)tmf_header, NULL,
751 ISCSI_TASK_TYPE_MIDPATH, false);
752
753 return 0;
754}
755
756int init_initiator_text_request_task(struct iscsi_task_params *task_params,
757 struct iscsi_text_request_hdr *text_header,
758 struct scsi_sgl_task_params *tx_params,
759 struct scsi_sgl_task_params *rx_params)
760{
761 struct iscsi_task_context *cxt;
762
763 cxt = task_params->context;
764
765 init_default_iscsi_task(task_params,
766 (struct data_hdr *)text_header,
767 ISCSI_TASK_TYPE_MIDPATH);
768
769 if (task_params->tx_io_size)
770 init_scsi_sgl_context(&cxt->ystorm_st_context.state.sgl_params,
771 &cxt->ystorm_st_context.state.data_desc,
772 tx_params);
773
774 if (task_params->rx_io_size)
775 init_scsi_sgl_context(&cxt->mstorm_st_context.sgl_params,
776 &cxt->mstorm_st_context.data_desc,
777 rx_params);
778
779 cxt->mstorm_st_context.rem_task_size =
780 cpu_to_le32(task_params->rx_io_size ?
781 rx_params->total_buffer_size : 0);
782
783 init_ustorm_task_contexts(&cxt->ustorm_st_context,
784 &cxt->ustorm_ag_context,
785 task_params->rx_io_size ?
786 rx_params->total_buffer_size : 0,
787 task_params->tx_io_size ?
788 tx_params->total_buffer_size : 0, 0, 0);
789
790 init_sqe(task_params, tx_params, NULL,
791 (struct iscsi_common_hdr *)text_header, NULL,
792 ISCSI_TASK_TYPE_MIDPATH, false);
793
794 return 0;
795}
796
797int init_cleanup_task(struct iscsi_task_params *task_params)
798{
799 init_sqe(task_params, NULL, NULL, NULL, NULL, ISCSI_TASK_TYPE_MIDPATH,
800 true);
801 return 0;
802}