xref: /openbmc/linux/drivers/scsi/qedi/qedi_fw.c (revision db22de3e)
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * QLogic iSCSI Offload Driver
4  * Copyright (c) 2016 Cavium Inc.
5  */
6 
7 #include <linux/blkdev.h>
8 #include <scsi/scsi_tcq.h>
9 #include <linux/delay.h>
10 
11 #include "qedi.h"
12 #include "qedi_iscsi.h"
13 #include "qedi_gbl.h"
14 #include "qedi_fw_iscsi.h"
15 #include "qedi_fw_scsi.h"
16 
17 static int send_iscsi_tmf(struct qedi_conn *qedi_conn,
18 			  struct iscsi_task *mtask, struct iscsi_task *ctask);
19 
qedi_iscsi_unmap_sg_list(struct qedi_cmd * cmd)20 void qedi_iscsi_unmap_sg_list(struct qedi_cmd *cmd)
21 {
22 	struct scsi_cmnd *sc = cmd->scsi_cmd;
23 
24 	if (cmd->io_tbl.sge_valid && sc) {
25 		cmd->io_tbl.sge_valid = 0;
26 		scsi_dma_unmap(sc);
27 	}
28 }
29 
qedi_process_logout_resp(struct qedi_ctx * qedi,union iscsi_cqe * cqe,struct iscsi_task * task,struct qedi_conn * qedi_conn)30 static void qedi_process_logout_resp(struct qedi_ctx *qedi,
31 				     union iscsi_cqe *cqe,
32 				     struct iscsi_task *task,
33 				     struct qedi_conn *qedi_conn)
34 {
35 	struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
36 	struct iscsi_logout_rsp *resp_hdr;
37 	struct iscsi_session *session = conn->session;
38 	struct iscsi_logout_response_hdr *cqe_logout_response;
39 	struct qedi_cmd *cmd;
40 
41 	cmd = (struct qedi_cmd *)task->dd_data;
42 	cqe_logout_response = &cqe->cqe_common.iscsi_hdr.logout_response;
43 	spin_lock(&session->back_lock);
44 	resp_hdr = (struct iscsi_logout_rsp *)&qedi_conn->gen_pdu.resp_hdr;
45 	memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
46 	resp_hdr->opcode = cqe_logout_response->opcode;
47 	resp_hdr->flags = cqe_logout_response->flags;
48 	resp_hdr->hlength = 0;
49 
50 	resp_hdr->itt = build_itt(cqe->cqe_solicited.itid, conn->session->age);
51 	resp_hdr->statsn = cpu_to_be32(cqe_logout_response->stat_sn);
52 	resp_hdr->exp_cmdsn = cpu_to_be32(cqe_logout_response->exp_cmd_sn);
53 	resp_hdr->max_cmdsn = cpu_to_be32(cqe_logout_response->max_cmd_sn);
54 
55 	resp_hdr->t2wait = cpu_to_be32(cqe_logout_response->time_2_wait);
56 	resp_hdr->t2retain = cpu_to_be32(cqe_logout_response->time_2_retain);
57 
58 	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
59 		  "Freeing tid=0x%x for cid=0x%x\n",
60 		  cmd->task_id, qedi_conn->iscsi_conn_id);
61 
62 	spin_lock(&qedi_conn->list_lock);
63 	if (likely(cmd->io_cmd_in_list)) {
64 		cmd->io_cmd_in_list = false;
65 		list_del_init(&cmd->io_cmd);
66 		qedi_conn->active_cmd_count--;
67 	} else {
68 		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
69 			  "Active cmd list node already deleted, tid=0x%x, cid=0x%x, io_cmd_node=%p\n",
70 			  cmd->task_id, qedi_conn->iscsi_conn_id,
71 			  &cmd->io_cmd);
72 	}
73 	spin_unlock(&qedi_conn->list_lock);
74 
75 	cmd->state = RESPONSE_RECEIVED;
76 	__iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0);
77 
78 	spin_unlock(&session->back_lock);
79 }
80 
qedi_process_text_resp(struct qedi_ctx * qedi,union iscsi_cqe * cqe,struct iscsi_task * task,struct qedi_conn * qedi_conn)81 static void qedi_process_text_resp(struct qedi_ctx *qedi,
82 				   union iscsi_cqe *cqe,
83 				   struct iscsi_task *task,
84 				   struct qedi_conn *qedi_conn)
85 {
86 	struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
87 	struct iscsi_session *session = conn->session;
88 	struct iscsi_task_context *task_ctx;
89 	struct iscsi_text_rsp *resp_hdr_ptr;
90 	struct iscsi_text_response_hdr *cqe_text_response;
91 	struct qedi_cmd *cmd;
92 	int pld_len;
93 
94 	cmd = (struct qedi_cmd *)task->dd_data;
95 	task_ctx = qedi_get_task_mem(&qedi->tasks, cmd->task_id);
96 
97 	cqe_text_response = &cqe->cqe_common.iscsi_hdr.text_response;
98 	spin_lock(&session->back_lock);
99 	resp_hdr_ptr =  (struct iscsi_text_rsp *)&qedi_conn->gen_pdu.resp_hdr;
100 	memset(resp_hdr_ptr, 0, sizeof(struct iscsi_hdr));
101 	resp_hdr_ptr->opcode = cqe_text_response->opcode;
102 	resp_hdr_ptr->flags = cqe_text_response->flags;
103 	resp_hdr_ptr->hlength = 0;
104 
105 	hton24(resp_hdr_ptr->dlength,
106 	       (cqe_text_response->hdr_second_dword &
107 		ISCSI_TEXT_RESPONSE_HDR_DATA_SEG_LEN_MASK));
108 
109 	resp_hdr_ptr->itt = build_itt(cqe->cqe_solicited.itid,
110 				      conn->session->age);
111 	resp_hdr_ptr->ttt = cqe_text_response->ttt;
112 	resp_hdr_ptr->statsn = cpu_to_be32(cqe_text_response->stat_sn);
113 	resp_hdr_ptr->exp_cmdsn = cpu_to_be32(cqe_text_response->exp_cmd_sn);
114 	resp_hdr_ptr->max_cmdsn = cpu_to_be32(cqe_text_response->max_cmd_sn);
115 
116 	pld_len = cqe_text_response->hdr_second_dword &
117 		  ISCSI_TEXT_RESPONSE_HDR_DATA_SEG_LEN_MASK;
118 	qedi_conn->gen_pdu.resp_wr_ptr = qedi_conn->gen_pdu.resp_buf + pld_len;
119 
120 	memset(task_ctx, '\0', sizeof(*task_ctx));
121 
122 	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
123 		  "Freeing tid=0x%x for cid=0x%x\n",
124 		  cmd->task_id, qedi_conn->iscsi_conn_id);
125 
126 	spin_lock(&qedi_conn->list_lock);
127 	if (likely(cmd->io_cmd_in_list)) {
128 		cmd->io_cmd_in_list = false;
129 		list_del_init(&cmd->io_cmd);
130 		qedi_conn->active_cmd_count--;
131 	} else {
132 		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
133 			  "Active cmd list node already deleted, tid=0x%x, cid=0x%x, io_cmd_node=%p\n",
134 			  cmd->task_id, qedi_conn->iscsi_conn_id,
135 			  &cmd->io_cmd);
136 	}
137 	spin_unlock(&qedi_conn->list_lock);
138 
139 	cmd->state = RESPONSE_RECEIVED;
140 
141 	__iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr_ptr,
142 			     qedi_conn->gen_pdu.resp_buf,
143 			     (qedi_conn->gen_pdu.resp_wr_ptr -
144 			      qedi_conn->gen_pdu.resp_buf));
145 	spin_unlock(&session->back_lock);
146 }
147 
qedi_tmf_resp_work(struct work_struct * work)148 static void qedi_tmf_resp_work(struct work_struct *work)
149 {
150 	struct qedi_cmd *qedi_cmd =
151 				container_of(work, struct qedi_cmd, tmf_work);
152 	struct qedi_conn *qedi_conn = qedi_cmd->conn;
153 	struct qedi_ctx *qedi = qedi_conn->qedi;
154 	struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
155 	struct iscsi_session *session = conn->session;
156 	struct iscsi_tm_rsp *resp_hdr_ptr;
157 	int rval = 0;
158 
159 	resp_hdr_ptr =  (struct iscsi_tm_rsp *)qedi_cmd->tmf_resp_buf;
160 
161 	rval = qedi_cleanup_all_io(qedi, qedi_conn, qedi_cmd->task, true);
162 	if (rval)
163 		goto exit_tmf_resp;
164 
165 	spin_lock(&session->back_lock);
166 	__iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr_ptr, NULL, 0);
167 	spin_unlock(&session->back_lock);
168 
169 exit_tmf_resp:
170 	kfree(resp_hdr_ptr);
171 
172 	spin_lock(&qedi_conn->tmf_work_lock);
173 	qedi_conn->fw_cleanup_works--;
174 	spin_unlock(&qedi_conn->tmf_work_lock);
175 }
176 
qedi_process_tmf_resp(struct qedi_ctx * qedi,union iscsi_cqe * cqe,struct iscsi_task * task,struct qedi_conn * qedi_conn)177 static void qedi_process_tmf_resp(struct qedi_ctx *qedi,
178 				  union iscsi_cqe *cqe,
179 				  struct iscsi_task *task,
180 				  struct qedi_conn *qedi_conn)
181 
182 {
183 	struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
184 	struct iscsi_session *session = conn->session;
185 	struct iscsi_tmf_response_hdr *cqe_tmp_response;
186 	struct iscsi_tm_rsp *resp_hdr_ptr;
187 	struct iscsi_tm *tmf_hdr;
188 	struct qedi_cmd *qedi_cmd = NULL;
189 
190 	cqe_tmp_response = &cqe->cqe_common.iscsi_hdr.tmf_response;
191 
192 	qedi_cmd = task->dd_data;
193 	qedi_cmd->tmf_resp_buf = kzalloc(sizeof(*resp_hdr_ptr), GFP_ATOMIC);
194 	if (!qedi_cmd->tmf_resp_buf) {
195 		QEDI_ERR(&qedi->dbg_ctx,
196 			 "Failed to allocate resp buf, cid=0x%x\n",
197 			  qedi_conn->iscsi_conn_id);
198 		return;
199 	}
200 
201 	spin_lock(&session->back_lock);
202 	resp_hdr_ptr =  (struct iscsi_tm_rsp *)qedi_cmd->tmf_resp_buf;
203 	memset(resp_hdr_ptr, 0, sizeof(struct iscsi_tm_rsp));
204 
205 	/* Fill up the header */
206 	resp_hdr_ptr->opcode = cqe_tmp_response->opcode;
207 	resp_hdr_ptr->flags = cqe_tmp_response->hdr_flags;
208 	resp_hdr_ptr->response = cqe_tmp_response->hdr_response;
209 	resp_hdr_ptr->hlength = 0;
210 
211 	hton24(resp_hdr_ptr->dlength,
212 	       (cqe_tmp_response->hdr_second_dword &
213 		ISCSI_TMF_RESPONSE_HDR_DATA_SEG_LEN_MASK));
214 	resp_hdr_ptr->itt = build_itt(cqe->cqe_solicited.itid,
215 				      conn->session->age);
216 	resp_hdr_ptr->statsn = cpu_to_be32(cqe_tmp_response->stat_sn);
217 	resp_hdr_ptr->exp_cmdsn  = cpu_to_be32(cqe_tmp_response->exp_cmd_sn);
218 	resp_hdr_ptr->max_cmdsn = cpu_to_be32(cqe_tmp_response->max_cmd_sn);
219 
220 	tmf_hdr = (struct iscsi_tm *)qedi_cmd->task->hdr;
221 
222 	spin_lock(&qedi_conn->list_lock);
223 	if (likely(qedi_cmd->io_cmd_in_list)) {
224 		qedi_cmd->io_cmd_in_list = false;
225 		list_del_init(&qedi_cmd->io_cmd);
226 		qedi_conn->active_cmd_count--;
227 	}
228 	spin_unlock(&qedi_conn->list_lock);
229 
230 	spin_lock(&qedi_conn->tmf_work_lock);
231 	switch (tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) {
232 	case ISCSI_TM_FUNC_LOGICAL_UNIT_RESET:
233 	case ISCSI_TM_FUNC_TARGET_WARM_RESET:
234 	case ISCSI_TM_FUNC_TARGET_COLD_RESET:
235 		if (qedi_conn->ep_disconnect_starting) {
236 			/* Session is down so ep_disconnect will clean up */
237 			spin_unlock(&qedi_conn->tmf_work_lock);
238 			goto unblock_sess;
239 		}
240 
241 		qedi_conn->fw_cleanup_works++;
242 		spin_unlock(&qedi_conn->tmf_work_lock);
243 
244 		INIT_WORK(&qedi_cmd->tmf_work, qedi_tmf_resp_work);
245 		queue_work(qedi->tmf_thread, &qedi_cmd->tmf_work);
246 		goto unblock_sess;
247 	}
248 	spin_unlock(&qedi_conn->tmf_work_lock);
249 
250 	__iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr_ptr, NULL, 0);
251 	kfree(resp_hdr_ptr);
252 
253 unblock_sess:
254 	spin_unlock(&session->back_lock);
255 }
256 
qedi_process_login_resp(struct qedi_ctx * qedi,union iscsi_cqe * cqe,struct iscsi_task * task,struct qedi_conn * qedi_conn)257 static void qedi_process_login_resp(struct qedi_ctx *qedi,
258 				    union iscsi_cqe *cqe,
259 				    struct iscsi_task *task,
260 				    struct qedi_conn *qedi_conn)
261 {
262 	struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
263 	struct iscsi_session *session = conn->session;
264 	struct iscsi_task_context *task_ctx;
265 	struct iscsi_login_rsp *resp_hdr_ptr;
266 	struct iscsi_login_response_hdr *cqe_login_response;
267 	struct qedi_cmd *cmd;
268 	int pld_len;
269 
270 	cmd = (struct qedi_cmd *)task->dd_data;
271 
272 	cqe_login_response = &cqe->cqe_common.iscsi_hdr.login_response;
273 	task_ctx = qedi_get_task_mem(&qedi->tasks, cmd->task_id);
274 
275 	spin_lock(&session->back_lock);
276 	resp_hdr_ptr =  (struct iscsi_login_rsp *)&qedi_conn->gen_pdu.resp_hdr;
277 	memset(resp_hdr_ptr, 0, sizeof(struct iscsi_login_rsp));
278 	resp_hdr_ptr->opcode = cqe_login_response->opcode;
279 	resp_hdr_ptr->flags = cqe_login_response->flags_attr;
280 	resp_hdr_ptr->hlength = 0;
281 
282 	hton24(resp_hdr_ptr->dlength,
283 	       (cqe_login_response->hdr_second_dword &
284 		ISCSI_LOGIN_RESPONSE_HDR_DATA_SEG_LEN_MASK));
285 	resp_hdr_ptr->itt = build_itt(cqe->cqe_solicited.itid,
286 				      conn->session->age);
287 	resp_hdr_ptr->tsih = cqe_login_response->tsih;
288 	resp_hdr_ptr->statsn = cpu_to_be32(cqe_login_response->stat_sn);
289 	resp_hdr_ptr->exp_cmdsn = cpu_to_be32(cqe_login_response->exp_cmd_sn);
290 	resp_hdr_ptr->max_cmdsn = cpu_to_be32(cqe_login_response->max_cmd_sn);
291 	resp_hdr_ptr->status_class = cqe_login_response->status_class;
292 	resp_hdr_ptr->status_detail = cqe_login_response->status_detail;
293 	pld_len = cqe_login_response->hdr_second_dword &
294 		  ISCSI_LOGIN_RESPONSE_HDR_DATA_SEG_LEN_MASK;
295 	qedi_conn->gen_pdu.resp_wr_ptr = qedi_conn->gen_pdu.resp_buf + pld_len;
296 
297 	spin_lock(&qedi_conn->list_lock);
298 	if (likely(cmd->io_cmd_in_list)) {
299 		cmd->io_cmd_in_list = false;
300 		list_del_init(&cmd->io_cmd);
301 		qedi_conn->active_cmd_count--;
302 	}
303 	spin_unlock(&qedi_conn->list_lock);
304 
305 	memset(task_ctx, '\0', sizeof(*task_ctx));
306 
307 	__iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr_ptr,
308 			     qedi_conn->gen_pdu.resp_buf,
309 			     (qedi_conn->gen_pdu.resp_wr_ptr -
310 			     qedi_conn->gen_pdu.resp_buf));
311 
312 	spin_unlock(&session->back_lock);
313 	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
314 		  "Freeing tid=0x%x for cid=0x%x\n",
315 		  cmd->task_id, qedi_conn->iscsi_conn_id);
316 	cmd->state = RESPONSE_RECEIVED;
317 }
318 
qedi_get_rq_bdq_buf(struct qedi_ctx * qedi,struct iscsi_cqe_unsolicited * cqe,char * ptr,int len)319 static void qedi_get_rq_bdq_buf(struct qedi_ctx *qedi,
320 				struct iscsi_cqe_unsolicited *cqe,
321 				char *ptr, int len)
322 {
323 	u16 idx = 0;
324 
325 	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
326 		  "pld_len [%d], bdq_prod_idx [%d], idx [%d]\n",
327 		  len, qedi->bdq_prod_idx,
328 		  (qedi->bdq_prod_idx % qedi->rq_num_entries));
329 
330 	/* Obtain buffer address from rqe_opaque */
331 	idx = cqe->rqe_opaque;
332 	if (idx > (QEDI_BDQ_NUM - 1)) {
333 		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
334 			  "wrong idx %d returned by FW, dropping the unsolicited pkt\n",
335 			  idx);
336 		return;
337 	}
338 
339 	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
340 		  "rqe_opaque [0x%p], idx [%d]\n", cqe->rqe_opaque, idx);
341 
342 	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
343 		  "unsol_cqe_type = %d\n", cqe->unsol_cqe_type);
344 	switch (cqe->unsol_cqe_type) {
345 	case ISCSI_CQE_UNSOLICITED_SINGLE:
346 	case ISCSI_CQE_UNSOLICITED_FIRST:
347 		if (len)
348 			memcpy(ptr, (void *)qedi->bdq[idx].buf_addr, len);
349 		break;
350 	case ISCSI_CQE_UNSOLICITED_MIDDLE:
351 	case ISCSI_CQE_UNSOLICITED_LAST:
352 		break;
353 	default:
354 		break;
355 	}
356 }
357 
qedi_put_rq_bdq_buf(struct qedi_ctx * qedi,struct iscsi_cqe_unsolicited * cqe,int count)358 static void qedi_put_rq_bdq_buf(struct qedi_ctx *qedi,
359 				struct iscsi_cqe_unsolicited *cqe,
360 				int count)
361 {
362 	u16 idx = 0;
363 	struct scsi_bd *pbl;
364 
365 	/* Obtain buffer address from rqe_opaque */
366 	idx = cqe->rqe_opaque;
367 	if (idx > (QEDI_BDQ_NUM - 1)) {
368 		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
369 			  "wrong idx %d returned by FW, dropping the unsolicited pkt\n",
370 			  idx);
371 		return;
372 	}
373 
374 	pbl = (struct scsi_bd *)qedi->bdq_pbl;
375 	pbl += (qedi->bdq_prod_idx % qedi->rq_num_entries);
376 	pbl->address.hi = cpu_to_le32(QEDI_U64_HI(qedi->bdq[idx].buf_dma));
377 	pbl->address.lo = cpu_to_le32(QEDI_U64_LO(qedi->bdq[idx].buf_dma));
378 	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
379 		  "pbl [0x%p] pbl->address hi [0x%llx] lo [0x%llx] idx [%d]\n",
380 		  pbl, pbl->address.hi, pbl->address.lo, idx);
381 	pbl->opaque.iscsi_opaque.reserved_zero[0] = 0;
382 	pbl->opaque.iscsi_opaque.reserved_zero[1] = 0;
383 	pbl->opaque.iscsi_opaque.reserved_zero[2] = 0;
384 	pbl->opaque.iscsi_opaque.opaque = cpu_to_le32(idx);
385 
386 	/* Increment producer to let f/w know we've handled the frame */
387 	qedi->bdq_prod_idx += count;
388 
389 	writew(qedi->bdq_prod_idx, qedi->bdq_primary_prod);
390 	readw(qedi->bdq_primary_prod);
391 
392 	writew(qedi->bdq_prod_idx, qedi->bdq_secondary_prod);
393 	readw(qedi->bdq_secondary_prod);
394 }
395 
qedi_unsol_pdu_adjust_bdq(struct qedi_ctx * qedi,struct iscsi_cqe_unsolicited * cqe,u32 pdu_len,u32 num_bdqs,char * bdq_data)396 static void qedi_unsol_pdu_adjust_bdq(struct qedi_ctx *qedi,
397 				      struct iscsi_cqe_unsolicited *cqe,
398 				      u32 pdu_len, u32 num_bdqs,
399 				      char *bdq_data)
400 {
401 	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
402 		  "num_bdqs [%d]\n", num_bdqs);
403 
404 	qedi_get_rq_bdq_buf(qedi, cqe, bdq_data, pdu_len);
405 	qedi_put_rq_bdq_buf(qedi, cqe, (num_bdqs + 1));
406 }
407 
qedi_process_nopin_mesg(struct qedi_ctx * qedi,union iscsi_cqe * cqe,struct iscsi_task * task,struct qedi_conn * qedi_conn,u16 que_idx)408 static int qedi_process_nopin_mesg(struct qedi_ctx *qedi,
409 				   union iscsi_cqe *cqe,
410 				   struct iscsi_task *task,
411 				   struct qedi_conn *qedi_conn, u16 que_idx)
412 {
413 	struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
414 	struct iscsi_session *session = conn->session;
415 	struct iscsi_nop_in_hdr *cqe_nop_in;
416 	struct iscsi_nopin *hdr;
417 	struct qedi_cmd *cmd;
418 	int tgt_async_nop = 0;
419 	u32 lun[2];
420 	u32 pdu_len, num_bdqs;
421 	char bdq_data[QEDI_BDQ_BUF_SIZE];
422 	unsigned long flags;
423 
424 	spin_lock_bh(&session->back_lock);
425 	cqe_nop_in = &cqe->cqe_common.iscsi_hdr.nop_in;
426 
427 	pdu_len = cqe_nop_in->hdr_second_dword &
428 		  ISCSI_NOP_IN_HDR_DATA_SEG_LEN_MASK;
429 	num_bdqs = pdu_len / QEDI_BDQ_BUF_SIZE;
430 
431 	hdr = (struct iscsi_nopin *)&qedi_conn->gen_pdu.resp_hdr;
432 	memset(hdr, 0, sizeof(struct iscsi_hdr));
433 	hdr->opcode = cqe_nop_in->opcode;
434 	hdr->max_cmdsn = cpu_to_be32(cqe_nop_in->max_cmd_sn);
435 	hdr->exp_cmdsn = cpu_to_be32(cqe_nop_in->exp_cmd_sn);
436 	hdr->statsn = cpu_to_be32(cqe_nop_in->stat_sn);
437 	hdr->ttt = cpu_to_be32(cqe_nop_in->ttt);
438 
439 	if (cqe->cqe_common.cqe_type == ISCSI_CQE_TYPE_UNSOLICITED) {
440 		spin_lock_irqsave(&qedi->hba_lock, flags);
441 		qedi_unsol_pdu_adjust_bdq(qedi, &cqe->cqe_unsolicited,
442 					  pdu_len, num_bdqs, bdq_data);
443 		hdr->itt = RESERVED_ITT;
444 		tgt_async_nop = 1;
445 		spin_unlock_irqrestore(&qedi->hba_lock, flags);
446 		goto done;
447 	}
448 
449 	/* Response to one of our nop-outs */
450 	if (task) {
451 		cmd = task->dd_data;
452 		hdr->flags = ISCSI_FLAG_CMD_FINAL;
453 		hdr->itt = build_itt(cqe->cqe_solicited.itid,
454 				     conn->session->age);
455 		lun[0] = 0xffffffff;
456 		lun[1] = 0xffffffff;
457 		memcpy(&hdr->lun, lun, sizeof(struct scsi_lun));
458 		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
459 			  "Freeing tid=0x%x for cid=0x%x\n",
460 			  cmd->task_id, qedi_conn->iscsi_conn_id);
461 		cmd->state = RESPONSE_RECEIVED;
462 		spin_lock(&qedi_conn->list_lock);
463 		if (likely(cmd->io_cmd_in_list)) {
464 			cmd->io_cmd_in_list = false;
465 			list_del_init(&cmd->io_cmd);
466 			qedi_conn->active_cmd_count--;
467 		}
468 
469 		spin_unlock(&qedi_conn->list_lock);
470 	}
471 
472 done:
473 	__iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, bdq_data, pdu_len);
474 
475 	spin_unlock_bh(&session->back_lock);
476 	return tgt_async_nop;
477 }
478 
qedi_process_async_mesg(struct qedi_ctx * qedi,union iscsi_cqe * cqe,struct iscsi_task * task,struct qedi_conn * qedi_conn,u16 que_idx)479 static void qedi_process_async_mesg(struct qedi_ctx *qedi,
480 				    union iscsi_cqe *cqe,
481 				    struct iscsi_task *task,
482 				    struct qedi_conn *qedi_conn,
483 				    u16 que_idx)
484 {
485 	struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
486 	struct iscsi_session *session = conn->session;
487 	struct iscsi_async_msg_hdr *cqe_async_msg;
488 	struct iscsi_async *resp_hdr;
489 	u32 lun[2];
490 	u32 pdu_len, num_bdqs;
491 	char bdq_data[QEDI_BDQ_BUF_SIZE];
492 	unsigned long flags;
493 
494 	spin_lock_bh(&session->back_lock);
495 
496 	cqe_async_msg = &cqe->cqe_common.iscsi_hdr.async_msg;
497 	pdu_len = cqe_async_msg->hdr_second_dword &
498 		ISCSI_ASYNC_MSG_HDR_DATA_SEG_LEN_MASK;
499 	num_bdqs = pdu_len / QEDI_BDQ_BUF_SIZE;
500 
501 	if (cqe->cqe_common.cqe_type == ISCSI_CQE_TYPE_UNSOLICITED) {
502 		spin_lock_irqsave(&qedi->hba_lock, flags);
503 		qedi_unsol_pdu_adjust_bdq(qedi, &cqe->cqe_unsolicited,
504 					  pdu_len, num_bdqs, bdq_data);
505 		spin_unlock_irqrestore(&qedi->hba_lock, flags);
506 	}
507 
508 	resp_hdr = (struct iscsi_async *)&qedi_conn->gen_pdu.resp_hdr;
509 	memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
510 	resp_hdr->opcode = cqe_async_msg->opcode;
511 	resp_hdr->flags = 0x80;
512 
513 	lun[0] = cpu_to_be32(cqe_async_msg->lun.lo);
514 	lun[1] = cpu_to_be32(cqe_async_msg->lun.hi);
515 	memcpy(&resp_hdr->lun, lun, sizeof(struct scsi_lun));
516 	resp_hdr->exp_cmdsn = cpu_to_be32(cqe_async_msg->exp_cmd_sn);
517 	resp_hdr->max_cmdsn = cpu_to_be32(cqe_async_msg->max_cmd_sn);
518 	resp_hdr->statsn = cpu_to_be32(cqe_async_msg->stat_sn);
519 
520 	resp_hdr->async_event = cqe_async_msg->async_event;
521 	resp_hdr->async_vcode = cqe_async_msg->async_vcode;
522 
523 	resp_hdr->param1 = cpu_to_be16(cqe_async_msg->param1_rsrv);
524 	resp_hdr->param2 = cpu_to_be16(cqe_async_msg->param2_rsrv);
525 	resp_hdr->param3 = cpu_to_be16(cqe_async_msg->param3_rsrv);
526 
527 	__iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, bdq_data,
528 			     pdu_len);
529 
530 	spin_unlock_bh(&session->back_lock);
531 }
532 
qedi_process_reject_mesg(struct qedi_ctx * qedi,union iscsi_cqe * cqe,struct iscsi_task * task,struct qedi_conn * qedi_conn,uint16_t que_idx)533 static void qedi_process_reject_mesg(struct qedi_ctx *qedi,
534 				     union iscsi_cqe *cqe,
535 				     struct iscsi_task *task,
536 				     struct qedi_conn *qedi_conn,
537 				     uint16_t que_idx)
538 {
539 	struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
540 	struct iscsi_session *session = conn->session;
541 	struct iscsi_reject_hdr *cqe_reject;
542 	struct iscsi_reject *hdr;
543 	u32 pld_len, num_bdqs;
544 	unsigned long flags;
545 
546 	spin_lock_bh(&session->back_lock);
547 	cqe_reject = &cqe->cqe_common.iscsi_hdr.reject;
548 	pld_len = cqe_reject->hdr_second_dword &
549 		  ISCSI_REJECT_HDR_DATA_SEG_LEN_MASK;
550 	num_bdqs = pld_len / QEDI_BDQ_BUF_SIZE;
551 
552 	if (cqe->cqe_common.cqe_type == ISCSI_CQE_TYPE_UNSOLICITED) {
553 		spin_lock_irqsave(&qedi->hba_lock, flags);
554 		qedi_unsol_pdu_adjust_bdq(qedi, &cqe->cqe_unsolicited,
555 					  pld_len, num_bdqs, conn->data);
556 		spin_unlock_irqrestore(&qedi->hba_lock, flags);
557 	}
558 	hdr = (struct iscsi_reject *)&qedi_conn->gen_pdu.resp_hdr;
559 	memset(hdr, 0, sizeof(struct iscsi_hdr));
560 	hdr->opcode = cqe_reject->opcode;
561 	hdr->reason = cqe_reject->hdr_reason;
562 	hdr->flags = cqe_reject->hdr_flags;
563 	hton24(hdr->dlength, (cqe_reject->hdr_second_dword &
564 			      ISCSI_REJECT_HDR_DATA_SEG_LEN_MASK));
565 	hdr->max_cmdsn = cpu_to_be32(cqe_reject->max_cmd_sn);
566 	hdr->exp_cmdsn = cpu_to_be32(cqe_reject->exp_cmd_sn);
567 	hdr->statsn = cpu_to_be32(cqe_reject->stat_sn);
568 	hdr->ffffffff = cpu_to_be32(0xffffffff);
569 
570 	__iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr,
571 			     conn->data, pld_len);
572 	spin_unlock_bh(&session->back_lock);
573 }
574 
qedi_scsi_completion(struct qedi_ctx * qedi,union iscsi_cqe * cqe,struct iscsi_task * task,struct iscsi_conn * conn)575 static void qedi_scsi_completion(struct qedi_ctx *qedi,
576 				 union iscsi_cqe *cqe,
577 				 struct iscsi_task *task,
578 				 struct iscsi_conn *conn)
579 {
580 	struct scsi_cmnd *sc_cmd;
581 	struct qedi_cmd *cmd = task->dd_data;
582 	struct iscsi_session *session = conn->session;
583 	struct iscsi_scsi_rsp *hdr;
584 	struct iscsi_data_in_hdr *cqe_data_in;
585 	int datalen = 0;
586 	struct qedi_conn *qedi_conn;
587 	u32 iscsi_cid;
588 	u8 cqe_err_bits = 0;
589 
590 	iscsi_cid  = cqe->cqe_common.conn_id;
591 	qedi_conn = qedi->cid_que.conn_cid_tbl[iscsi_cid];
592 
593 	cqe_data_in = &cqe->cqe_common.iscsi_hdr.data_in;
594 	cqe_err_bits =
595 		cqe->cqe_common.error_bitmap.error_bits.cqe_error_status_bits;
596 
597 	spin_lock_bh(&session->back_lock);
598 	/* get the scsi command */
599 	sc_cmd = cmd->scsi_cmd;
600 
601 	if (!sc_cmd) {
602 		QEDI_WARN(&qedi->dbg_ctx, "sc_cmd is NULL!\n");
603 		goto error;
604 	}
605 
606 	if (!iscsi_cmd(sc_cmd)->task) {
607 		QEDI_WARN(&qedi->dbg_ctx,
608 			  "NULL task pointer, returned in another context.\n");
609 		goto error;
610 	}
611 
612 	if (!scsi_cmd_to_rq(sc_cmd)->q) {
613 		QEDI_WARN(&qedi->dbg_ctx,
614 			  "request->q is NULL so request is not valid, sc_cmd=%p.\n",
615 			  sc_cmd);
616 		goto error;
617 	}
618 
619 	qedi_iscsi_unmap_sg_list(cmd);
620 
621 	hdr = (struct iscsi_scsi_rsp *)task->hdr;
622 	hdr->opcode = cqe_data_in->opcode;
623 	hdr->max_cmdsn = cpu_to_be32(cqe_data_in->max_cmd_sn);
624 	hdr->exp_cmdsn = cpu_to_be32(cqe_data_in->exp_cmd_sn);
625 	hdr->itt = build_itt(cqe->cqe_solicited.itid, conn->session->age);
626 	hdr->response = cqe_data_in->reserved1;
627 	hdr->cmd_status = cqe_data_in->status_rsvd;
628 	hdr->flags = cqe_data_in->flags;
629 	hdr->residual_count = cpu_to_be32(cqe_data_in->residual_count);
630 
631 	if (hdr->cmd_status == SAM_STAT_CHECK_CONDITION) {
632 		datalen = cqe_data_in->reserved2 &
633 			  ISCSI_COMMON_HDR_DATA_SEG_LEN_MASK;
634 		memcpy((char *)conn->data, (char *)cmd->sense_buffer, datalen);
635 	}
636 
637 	/* If f/w reports data underrun err then set residual to IO transfer
638 	 * length, set Underrun flag and clear Overrun flag explicitly
639 	 */
640 	if (unlikely(cqe_err_bits &&
641 		     GET_FIELD(cqe_err_bits, CQE_ERROR_BITMAP_UNDER_RUN_ERR))) {
642 		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
643 			  "Under flow itt=0x%x proto flags=0x%x tid=0x%x cid 0x%x fw resid 0x%x sc dlen 0x%x\n",
644 			  hdr->itt, cqe_data_in->flags, cmd->task_id,
645 			  qedi_conn->iscsi_conn_id, hdr->residual_count,
646 			  scsi_bufflen(sc_cmd));
647 		hdr->residual_count = cpu_to_be32(scsi_bufflen(sc_cmd));
648 		hdr->flags |= ISCSI_FLAG_CMD_UNDERFLOW;
649 		hdr->flags &= (~ISCSI_FLAG_CMD_OVERFLOW);
650 	}
651 
652 	spin_lock(&qedi_conn->list_lock);
653 	if (likely(cmd->io_cmd_in_list)) {
654 		cmd->io_cmd_in_list = false;
655 		list_del_init(&cmd->io_cmd);
656 		qedi_conn->active_cmd_count--;
657 	}
658 	spin_unlock(&qedi_conn->list_lock);
659 
660 	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
661 		  "Freeing tid=0x%x for cid=0x%x\n",
662 		  cmd->task_id, qedi_conn->iscsi_conn_id);
663 	cmd->state = RESPONSE_RECEIVED;
664 	if (qedi_io_tracing)
665 		qedi_trace_io(qedi, task, cmd->task_id, QEDI_IO_TRACE_RSP);
666 
667 	__iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr,
668 			     conn->data, datalen);
669 error:
670 	spin_unlock_bh(&session->back_lock);
671 }
672 
qedi_mtask_completion(struct qedi_ctx * qedi,union iscsi_cqe * cqe,struct iscsi_task * task,struct qedi_conn * conn,uint16_t que_idx)673 static void qedi_mtask_completion(struct qedi_ctx *qedi,
674 				  union iscsi_cqe *cqe,
675 				  struct iscsi_task *task,
676 				  struct qedi_conn *conn, uint16_t que_idx)
677 {
678 	struct iscsi_conn *iscsi_conn;
679 	u32 hdr_opcode;
680 
681 	hdr_opcode = cqe->cqe_common.iscsi_hdr.common.hdr_first_byte;
682 	iscsi_conn = conn->cls_conn->dd_data;
683 
684 	switch (hdr_opcode) {
685 	case ISCSI_OPCODE_SCSI_RESPONSE:
686 	case ISCSI_OPCODE_DATA_IN:
687 		qedi_scsi_completion(qedi, cqe, task, iscsi_conn);
688 		break;
689 	case ISCSI_OPCODE_LOGIN_RESPONSE:
690 		qedi_process_login_resp(qedi, cqe, task, conn);
691 		break;
692 	case ISCSI_OPCODE_TMF_RESPONSE:
693 		qedi_process_tmf_resp(qedi, cqe, task, conn);
694 		break;
695 	case ISCSI_OPCODE_TEXT_RESPONSE:
696 		qedi_process_text_resp(qedi, cqe, task, conn);
697 		break;
698 	case ISCSI_OPCODE_LOGOUT_RESPONSE:
699 		qedi_process_logout_resp(qedi, cqe, task, conn);
700 		break;
701 	case ISCSI_OPCODE_NOP_IN:
702 		qedi_process_nopin_mesg(qedi, cqe, task, conn, que_idx);
703 		break;
704 	default:
705 		QEDI_ERR(&qedi->dbg_ctx, "unknown opcode\n");
706 	}
707 }
708 
qedi_process_nopin_local_cmpl(struct qedi_ctx * qedi,struct iscsi_cqe_solicited * cqe,struct iscsi_task * task,struct qedi_conn * qedi_conn)709 static void qedi_process_nopin_local_cmpl(struct qedi_ctx *qedi,
710 					  struct iscsi_cqe_solicited *cqe,
711 					  struct iscsi_task *task,
712 					  struct qedi_conn *qedi_conn)
713 {
714 	struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
715 	struct iscsi_session *session = conn->session;
716 	struct qedi_cmd *cmd = task->dd_data;
717 
718 	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_UNSOL,
719 		  "itid=0x%x, cmd task id=0x%x\n",
720 		  cqe->itid, cmd->task_id);
721 
722 	cmd->state = RESPONSE_RECEIVED;
723 
724 	spin_lock_bh(&session->back_lock);
725 	__iscsi_put_task(task);
726 	spin_unlock_bh(&session->back_lock);
727 }
728 
qedi_process_cmd_cleanup_resp(struct qedi_ctx * qedi,struct iscsi_cqe_solicited * cqe,struct iscsi_conn * conn)729 static void qedi_process_cmd_cleanup_resp(struct qedi_ctx *qedi,
730 					  struct iscsi_cqe_solicited *cqe,
731 					  struct iscsi_conn *conn)
732 {
733 	struct qedi_work_map *work, *work_tmp;
734 	u32 proto_itt = cqe->itid;
735 	int found = 0;
736 	struct qedi_cmd *qedi_cmd = NULL;
737 	u32 iscsi_cid;
738 	struct qedi_conn *qedi_conn;
739 	struct qedi_cmd *dbg_cmd;
740 	struct iscsi_task *mtask, *task;
741 	struct iscsi_tm *tmf_hdr = NULL;
742 
743 	iscsi_cid = cqe->conn_id;
744 	qedi_conn = qedi->cid_que.conn_cid_tbl[iscsi_cid];
745 	if (!qedi_conn) {
746 		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
747 			  "icid not found 0x%x\n", cqe->conn_id);
748 		return;
749 	}
750 
751 	/* Based on this itt get the corresponding qedi_cmd */
752 	spin_lock_bh(&qedi_conn->tmf_work_lock);
753 	list_for_each_entry_safe(work, work_tmp, &qedi_conn->tmf_work_list,
754 				 list) {
755 		if (work->rtid == proto_itt) {
756 			/* We found the command */
757 			qedi_cmd = work->qedi_cmd;
758 			if (!qedi_cmd->list_tmf_work) {
759 				QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
760 					  "TMF work not found, cqe->tid=0x%x, cid=0x%x\n",
761 					  proto_itt, qedi_conn->iscsi_conn_id);
762 				WARN_ON(1);
763 			}
764 			found = 1;
765 			mtask = qedi_cmd->task;
766 			task = work->ctask;
767 			tmf_hdr = (struct iscsi_tm *)mtask->hdr;
768 
769 			list_del_init(&work->list);
770 			kfree(work);
771 			qedi_cmd->list_tmf_work = NULL;
772 		}
773 	}
774 	spin_unlock_bh(&qedi_conn->tmf_work_lock);
775 
776 	if (!found)
777 		goto check_cleanup_reqs;
778 
779 	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
780 		  "TMF work, cqe->tid=0x%x, tmf flags=0x%x, cid=0x%x\n",
781 		  proto_itt, tmf_hdr->flags, qedi_conn->iscsi_conn_id);
782 
783 	spin_lock_bh(&conn->session->back_lock);
784 	if (iscsi_task_is_completed(task)) {
785 		QEDI_NOTICE(&qedi->dbg_ctx,
786 			    "IO task completed, tmf rtt=0x%x, cid=0x%x\n",
787 			   get_itt(tmf_hdr->rtt), qedi_conn->iscsi_conn_id);
788 		goto unlock;
789 	}
790 
791 	dbg_cmd = task->dd_data;
792 
793 	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
794 		  "Abort tmf rtt=0x%x, i/o itt=0x%x, i/o tid=0x%x, cid=0x%x\n",
795 		  get_itt(tmf_hdr->rtt), get_itt(task->itt), dbg_cmd->task_id,
796 		  qedi_conn->iscsi_conn_id);
797 
798 	spin_lock(&qedi_conn->list_lock);
799 	if (likely(dbg_cmd->io_cmd_in_list)) {
800 		dbg_cmd->io_cmd_in_list = false;
801 		list_del_init(&dbg_cmd->io_cmd);
802 		qedi_conn->active_cmd_count--;
803 	}
804 	spin_unlock(&qedi_conn->list_lock);
805 	qedi_cmd->state = CLEANUP_RECV;
806 unlock:
807 	spin_unlock_bh(&conn->session->back_lock);
808 	wake_up_interruptible(&qedi_conn->wait_queue);
809 	return;
810 
811 check_cleanup_reqs:
812 	if (atomic_inc_return(&qedi_conn->cmd_cleanup_cmpl) ==
813 	    qedi_conn->cmd_cleanup_req) {
814 		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
815 			  "Freeing tid=0x%x for cid=0x%x\n",
816 			  cqe->itid, qedi_conn->iscsi_conn_id);
817 		wake_up(&qedi_conn->wait_queue);
818 	}
819 }
820 
qedi_fp_process_cqes(struct qedi_work * work)821 void qedi_fp_process_cqes(struct qedi_work *work)
822 {
823 	struct qedi_ctx *qedi = work->qedi;
824 	union iscsi_cqe *cqe = &work->cqe;
825 	struct iscsi_task *task = NULL;
826 	struct iscsi_nopout *nopout_hdr;
827 	struct qedi_conn *q_conn;
828 	struct iscsi_conn *conn;
829 	struct qedi_cmd *qedi_cmd;
830 	u32 comp_type;
831 	u32 iscsi_cid;
832 	u32 hdr_opcode;
833 	u16 que_idx = work->que_idx;
834 	u8 cqe_err_bits = 0;
835 
836 	comp_type = cqe->cqe_common.cqe_type;
837 	hdr_opcode = cqe->cqe_common.iscsi_hdr.common.hdr_first_byte;
838 	cqe_err_bits =
839 		cqe->cqe_common.error_bitmap.error_bits.cqe_error_status_bits;
840 
841 	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
842 		  "fw_cid=0x%x, cqe type=0x%x, opcode=0x%x\n",
843 		  cqe->cqe_common.conn_id, comp_type, hdr_opcode);
844 
845 	if (comp_type >= MAX_ISCSI_CQES_TYPE) {
846 		QEDI_WARN(&qedi->dbg_ctx, "Invalid CqE type\n");
847 		return;
848 	}
849 
850 	iscsi_cid  = cqe->cqe_common.conn_id;
851 	q_conn = qedi->cid_que.conn_cid_tbl[iscsi_cid];
852 	if (!q_conn) {
853 		QEDI_WARN(&qedi->dbg_ctx,
854 			  "Session no longer exists for cid=0x%x!!\n",
855 			  iscsi_cid);
856 		return;
857 	}
858 
859 	conn = q_conn->cls_conn->dd_data;
860 
861 	if (unlikely(cqe_err_bits &&
862 		     GET_FIELD(cqe_err_bits,
863 			       CQE_ERROR_BITMAP_DATA_DIGEST_ERR))) {
864 		iscsi_conn_failure(conn, ISCSI_ERR_DATA_DGST);
865 		return;
866 	}
867 
868 	switch (comp_type) {
869 	case ISCSI_CQE_TYPE_SOLICITED:
870 	case ISCSI_CQE_TYPE_SOLICITED_WITH_SENSE:
871 		qedi_cmd = container_of(work, struct qedi_cmd, cqe_work);
872 		task = qedi_cmd->task;
873 		if (!task) {
874 			QEDI_WARN(&qedi->dbg_ctx, "task is NULL\n");
875 			return;
876 		}
877 
878 		/* Process NOPIN local completion */
879 		nopout_hdr = (struct iscsi_nopout *)task->hdr;
880 		if ((nopout_hdr->itt == RESERVED_ITT) &&
881 		    (cqe->cqe_solicited.itid != (u16)RESERVED_ITT)) {
882 			qedi_process_nopin_local_cmpl(qedi, &cqe->cqe_solicited,
883 						      task, q_conn);
884 		} else {
885 			cqe->cqe_solicited.itid =
886 					       qedi_get_itt(cqe->cqe_solicited);
887 			/* Process other solicited responses */
888 			qedi_mtask_completion(qedi, cqe, task, q_conn, que_idx);
889 		}
890 		break;
891 	case ISCSI_CQE_TYPE_UNSOLICITED:
892 		switch (hdr_opcode) {
893 		case ISCSI_OPCODE_NOP_IN:
894 			qedi_process_nopin_mesg(qedi, cqe, task, q_conn,
895 						que_idx);
896 			break;
897 		case ISCSI_OPCODE_ASYNC_MSG:
898 			qedi_process_async_mesg(qedi, cqe, task, q_conn,
899 						que_idx);
900 			break;
901 		case ISCSI_OPCODE_REJECT:
902 			qedi_process_reject_mesg(qedi, cqe, task, q_conn,
903 						 que_idx);
904 			break;
905 		}
906 		goto exit_fp_process;
907 	case ISCSI_CQE_TYPE_DUMMY:
908 		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM, "Dummy CqE\n");
909 		goto exit_fp_process;
910 	case ISCSI_CQE_TYPE_TASK_CLEANUP:
911 		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM, "CleanUp CqE\n");
912 		qedi_process_cmd_cleanup_resp(qedi, &cqe->cqe_solicited, conn);
913 		goto exit_fp_process;
914 	default:
915 		QEDI_ERR(&qedi->dbg_ctx, "Error cqe.\n");
916 		break;
917 	}
918 
919 exit_fp_process:
920 	return;
921 }
922 
qedi_ring_doorbell(struct qedi_conn * qedi_conn)923 static void qedi_ring_doorbell(struct qedi_conn *qedi_conn)
924 {
925 	qedi_conn->ep->db_data.sq_prod = qedi_conn->ep->fw_sq_prod_idx;
926 
927 	/* wmb - Make sure fw idx is coherent */
928 	wmb();
929 	writel(*(u32 *)&qedi_conn->ep->db_data, qedi_conn->ep->p_doorbell);
930 
931 	/* Make sure fw write idx is coherent, and include both memory barriers
932 	 * as a failsafe as for some architectures the call is the same but on
933 	 * others they are two different assembly operations.
934 	 */
935 	wmb();
936 	QEDI_INFO(&qedi_conn->qedi->dbg_ctx, QEDI_LOG_MP_REQ,
937 		  "prod_idx=0x%x, fw_prod_idx=0x%x, cid=0x%x\n",
938 		  qedi_conn->ep->sq_prod_idx, qedi_conn->ep->fw_sq_prod_idx,
939 		  qedi_conn->iscsi_conn_id);
940 }
941 
qedi_get_wqe_idx(struct qedi_conn * qedi_conn)942 static u16 qedi_get_wqe_idx(struct qedi_conn *qedi_conn)
943 {
944 	struct qedi_endpoint *ep;
945 	u16 rval;
946 
947 	ep = qedi_conn->ep;
948 	rval = ep->sq_prod_idx;
949 
950 	/* Increament SQ index */
951 	ep->sq_prod_idx++;
952 	ep->fw_sq_prod_idx++;
953 	if (ep->sq_prod_idx == QEDI_SQ_SIZE)
954 		ep->sq_prod_idx = 0;
955 
956 	return rval;
957 }
958 
qedi_send_iscsi_login(struct qedi_conn * qedi_conn,struct iscsi_task * task)959 int qedi_send_iscsi_login(struct qedi_conn *qedi_conn,
960 			  struct iscsi_task *task)
961 {
962 	struct iscsi_login_req_hdr login_req_pdu_header;
963 	struct scsi_sgl_task_params tx_sgl_task_params;
964 	struct scsi_sgl_task_params rx_sgl_task_params;
965 	struct iscsi_task_params task_params;
966 	struct iscsi_task_context *fw_task_ctx;
967 	struct qedi_ctx *qedi = qedi_conn->qedi;
968 	struct iscsi_login_req *login_hdr;
969 	struct scsi_sge *resp_sge = NULL;
970 	struct qedi_cmd *qedi_cmd;
971 	struct qedi_endpoint *ep;
972 	s16 tid = 0;
973 	u16 sq_idx = 0;
974 	int rval = 0;
975 
976 	resp_sge = (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
977 	qedi_cmd = (struct qedi_cmd *)task->dd_data;
978 	ep = qedi_conn->ep;
979 	login_hdr = (struct iscsi_login_req *)task->hdr;
980 
981 	tid = qedi_get_task_idx(qedi);
982 	if (tid == -1)
983 		return -ENOMEM;
984 
985 	fw_task_ctx =
986 	     (struct iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
987 							       tid);
988 	memset(fw_task_ctx, 0, sizeof(struct iscsi_task_context));
989 
990 	qedi_cmd->task_id = tid;
991 
992 	memset(&task_params, 0, sizeof(task_params));
993 	memset(&login_req_pdu_header, 0, sizeof(login_req_pdu_header));
994 	memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params));
995 	memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params));
996 	/* Update header info */
997 	login_req_pdu_header.opcode = login_hdr->opcode;
998 	login_req_pdu_header.version_min = login_hdr->min_version;
999 	login_req_pdu_header.version_max = login_hdr->max_version;
1000 	login_req_pdu_header.flags_attr = login_hdr->flags;
1001 	login_req_pdu_header.isid_tabc = swab32p((u32 *)login_hdr->isid);
1002 	login_req_pdu_header.isid_d = swab16p((u16 *)&login_hdr->isid[4]);
1003 
1004 	login_req_pdu_header.tsih = login_hdr->tsih;
1005 	login_req_pdu_header.hdr_second_dword = ntoh24(login_hdr->dlength);
1006 
1007 	qedi_update_itt_map(qedi, tid, task->itt, qedi_cmd);
1008 	login_req_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt));
1009 	login_req_pdu_header.cid = qedi_conn->iscsi_conn_id;
1010 	login_req_pdu_header.cmd_sn = be32_to_cpu(login_hdr->cmdsn);
1011 	login_req_pdu_header.exp_stat_sn = be32_to_cpu(login_hdr->exp_statsn);
1012 	login_req_pdu_header.exp_stat_sn = 0;
1013 
1014 	/* Fill tx AHS and rx buffer */
1015 	tx_sgl_task_params.sgl =
1016 			       (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
1017 	tx_sgl_task_params.sgl_phys_addr.lo =
1018 					 (u32)(qedi_conn->gen_pdu.req_dma_addr);
1019 	tx_sgl_task_params.sgl_phys_addr.hi =
1020 			      (u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32);
1021 	tx_sgl_task_params.total_buffer_size = ntoh24(login_hdr->dlength);
1022 	tx_sgl_task_params.num_sges = 1;
1023 
1024 	rx_sgl_task_params.sgl =
1025 			      (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1026 	rx_sgl_task_params.sgl_phys_addr.lo =
1027 					(u32)(qedi_conn->gen_pdu.resp_dma_addr);
1028 	rx_sgl_task_params.sgl_phys_addr.hi =
1029 			     (u32)((u64)qedi_conn->gen_pdu.resp_dma_addr >> 32);
1030 	rx_sgl_task_params.total_buffer_size = resp_sge->sge_len;
1031 	rx_sgl_task_params.num_sges = 1;
1032 
1033 	/* Fill fw input params */
1034 	task_params.context = fw_task_ctx;
1035 	task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
1036 	task_params.itid = tid;
1037 	task_params.cq_rss_number = 0;
1038 	task_params.tx_io_size = ntoh24(login_hdr->dlength);
1039 	task_params.rx_io_size = resp_sge->sge_len;
1040 
1041 	sq_idx = qedi_get_wqe_idx(qedi_conn);
1042 	task_params.sqe = &ep->sq[sq_idx];
1043 
1044 	memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
1045 	rval = init_initiator_login_request_task(&task_params,
1046 						 &login_req_pdu_header,
1047 						 &tx_sgl_task_params,
1048 						 &rx_sgl_task_params);
1049 	if (rval)
1050 		return -1;
1051 
1052 	spin_lock(&qedi_conn->list_lock);
1053 	list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
1054 	qedi_cmd->io_cmd_in_list = true;
1055 	qedi_conn->active_cmd_count++;
1056 	spin_unlock(&qedi_conn->list_lock);
1057 
1058 	qedi_ring_doorbell(qedi_conn);
1059 	return 0;
1060 }
1061 
qedi_send_iscsi_logout(struct qedi_conn * qedi_conn,struct iscsi_task * task)1062 int qedi_send_iscsi_logout(struct qedi_conn *qedi_conn,
1063 			   struct iscsi_task *task)
1064 {
1065 	struct iscsi_logout_req_hdr logout_pdu_header;
1066 	struct scsi_sgl_task_params tx_sgl_task_params;
1067 	struct scsi_sgl_task_params rx_sgl_task_params;
1068 	struct iscsi_task_params task_params;
1069 	struct iscsi_task_context *fw_task_ctx;
1070 	struct iscsi_logout *logout_hdr = NULL;
1071 	struct qedi_ctx *qedi = qedi_conn->qedi;
1072 	struct qedi_cmd *qedi_cmd;
1073 	struct qedi_endpoint *ep;
1074 	s16 tid = 0;
1075 	u16 sq_idx = 0;
1076 	int rval = 0;
1077 
1078 	qedi_cmd = (struct qedi_cmd *)task->dd_data;
1079 	logout_hdr = (struct iscsi_logout *)task->hdr;
1080 	ep = qedi_conn->ep;
1081 
1082 	tid = qedi_get_task_idx(qedi);
1083 	if (tid == -1)
1084 		return -ENOMEM;
1085 
1086 	fw_task_ctx =
1087 	     (struct iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
1088 							       tid);
1089 	memset(fw_task_ctx, 0, sizeof(struct iscsi_task_context));
1090 
1091 	qedi_cmd->task_id = tid;
1092 
1093 	memset(&task_params, 0, sizeof(task_params));
1094 	memset(&logout_pdu_header, 0, sizeof(logout_pdu_header));
1095 	memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params));
1096 	memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params));
1097 
1098 	/* Update header info */
1099 	logout_pdu_header.opcode = logout_hdr->opcode;
1100 	logout_pdu_header.reason_code = 0x80 | logout_hdr->flags;
1101 	qedi_update_itt_map(qedi, tid, task->itt, qedi_cmd);
1102 	logout_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt));
1103 	logout_pdu_header.exp_stat_sn = be32_to_cpu(logout_hdr->exp_statsn);
1104 	logout_pdu_header.cmd_sn = be32_to_cpu(logout_hdr->cmdsn);
1105 	logout_pdu_header.cid = qedi_conn->iscsi_conn_id;
1106 
1107 	/* Fill fw input params */
1108 	task_params.context = fw_task_ctx;
1109 	task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
1110 	task_params.itid = tid;
1111 	task_params.cq_rss_number = 0;
1112 	task_params.tx_io_size = 0;
1113 	task_params.rx_io_size = 0;
1114 
1115 	sq_idx = qedi_get_wqe_idx(qedi_conn);
1116 	task_params.sqe = &ep->sq[sq_idx];
1117 	memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
1118 
1119 	rval = init_initiator_logout_request_task(&task_params,
1120 						  &logout_pdu_header,
1121 						  NULL, NULL);
1122 	if (rval)
1123 		return -1;
1124 
1125 	spin_lock(&qedi_conn->list_lock);
1126 	list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
1127 	qedi_cmd->io_cmd_in_list = true;
1128 	qedi_conn->active_cmd_count++;
1129 	spin_unlock(&qedi_conn->list_lock);
1130 
1131 	qedi_ring_doorbell(qedi_conn);
1132 	return 0;
1133 }
1134 
qedi_cleanup_all_io(struct qedi_ctx * qedi,struct qedi_conn * qedi_conn,struct iscsi_task * task,bool in_recovery)1135 int qedi_cleanup_all_io(struct qedi_ctx *qedi, struct qedi_conn *qedi_conn,
1136 			struct iscsi_task *task, bool in_recovery)
1137 {
1138 	int rval;
1139 	struct iscsi_task *ctask;
1140 	struct qedi_cmd *cmd, *cmd_tmp;
1141 	struct iscsi_tm *tmf_hdr;
1142 	unsigned int lun = 0;
1143 	bool lun_reset = false;
1144 	struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
1145 	struct iscsi_session *session = conn->session;
1146 
1147 	/* From recovery, task is NULL or from tmf resp valid task */
1148 	if (task) {
1149 		tmf_hdr = (struct iscsi_tm *)task->hdr;
1150 
1151 		if ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
1152 			ISCSI_TM_FUNC_LOGICAL_UNIT_RESET) {
1153 			lun_reset = true;
1154 			lun = scsilun_to_int(&tmf_hdr->lun);
1155 		}
1156 	}
1157 
1158 	qedi_conn->cmd_cleanup_req = 0;
1159 	atomic_set(&qedi_conn->cmd_cleanup_cmpl, 0);
1160 
1161 	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1162 		  "active_cmd_count=%d, cid=0x%x, in_recovery=%d, lun_reset=%d\n",
1163 		  qedi_conn->active_cmd_count, qedi_conn->iscsi_conn_id,
1164 		  in_recovery, lun_reset);
1165 
1166 	if (lun_reset)
1167 		spin_lock_bh(&session->back_lock);
1168 
1169 	spin_lock(&qedi_conn->list_lock);
1170 
1171 	list_for_each_entry_safe(cmd, cmd_tmp, &qedi_conn->active_cmd_list,
1172 				 io_cmd) {
1173 		ctask = cmd->task;
1174 		if (ctask == task)
1175 			continue;
1176 
1177 		if (lun_reset) {
1178 			if (cmd->scsi_cmd && cmd->scsi_cmd->device) {
1179 				QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1180 					  "tid=0x%x itt=0x%x scsi_cmd_ptr=%p device=%p task_state=%d cmd_state=0%x cid=0x%x\n",
1181 					  cmd->task_id, get_itt(ctask->itt),
1182 					  cmd->scsi_cmd, cmd->scsi_cmd->device,
1183 					  ctask->state, cmd->state,
1184 					  qedi_conn->iscsi_conn_id);
1185 				if (cmd->scsi_cmd->device->lun != lun)
1186 					continue;
1187 			}
1188 		}
1189 		qedi_conn->cmd_cleanup_req++;
1190 		qedi_iscsi_cleanup_task(ctask, true);
1191 
1192 		cmd->io_cmd_in_list = false;
1193 		list_del_init(&cmd->io_cmd);
1194 		qedi_conn->active_cmd_count--;
1195 		QEDI_WARN(&qedi->dbg_ctx,
1196 			  "Deleted active cmd list node io_cmd=%p, cid=0x%x\n",
1197 			  &cmd->io_cmd, qedi_conn->iscsi_conn_id);
1198 	}
1199 
1200 	spin_unlock(&qedi_conn->list_lock);
1201 
1202 	if (lun_reset)
1203 		spin_unlock_bh(&session->back_lock);
1204 
1205 	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1206 		  "cmd_cleanup_req=%d, cid=0x%x\n",
1207 		  qedi_conn->cmd_cleanup_req,
1208 		  qedi_conn->iscsi_conn_id);
1209 
1210 	rval  = wait_event_interruptible_timeout(qedi_conn->wait_queue,
1211 				(qedi_conn->cmd_cleanup_req ==
1212 				 atomic_read(&qedi_conn->cmd_cleanup_cmpl)) ||
1213 				test_bit(QEDI_IN_RECOVERY, &qedi->flags),
1214 				5 * HZ);
1215 	if (rval) {
1216 		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1217 			  "i/o cmd_cleanup_req=%d, equal to cmd_cleanup_cmpl=%d, cid=0x%x\n",
1218 			  qedi_conn->cmd_cleanup_req,
1219 			  atomic_read(&qedi_conn->cmd_cleanup_cmpl),
1220 			  qedi_conn->iscsi_conn_id);
1221 
1222 		return 0;
1223 	}
1224 
1225 	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1226 		  "i/o cmd_cleanup_req=%d, not equal to cmd_cleanup_cmpl=%d, cid=0x%x\n",
1227 		  qedi_conn->cmd_cleanup_req,
1228 		  atomic_read(&qedi_conn->cmd_cleanup_cmpl),
1229 		  qedi_conn->iscsi_conn_id);
1230 
1231 	iscsi_host_for_each_session(qedi->shost,
1232 				    qedi_mark_device_missing);
1233 	qedi_ops->common->drain(qedi->cdev);
1234 
1235 	/* Enable IOs for all other sessions except current.*/
1236 	if (!wait_event_interruptible_timeout(qedi_conn->wait_queue,
1237 				(qedi_conn->cmd_cleanup_req ==
1238 				 atomic_read(&qedi_conn->cmd_cleanup_cmpl)) ||
1239 				test_bit(QEDI_IN_RECOVERY, &qedi->flags),
1240 				5 * HZ)) {
1241 		iscsi_host_for_each_session(qedi->shost,
1242 					    qedi_mark_device_available);
1243 		return -1;
1244 	}
1245 
1246 	iscsi_host_for_each_session(qedi->shost,
1247 				    qedi_mark_device_available);
1248 
1249 	return 0;
1250 }
1251 
qedi_clearsq(struct qedi_ctx * qedi,struct qedi_conn * qedi_conn,struct iscsi_task * task)1252 void qedi_clearsq(struct qedi_ctx *qedi, struct qedi_conn *qedi_conn,
1253 		  struct iscsi_task *task)
1254 {
1255 	struct qedi_endpoint *qedi_ep;
1256 	int rval;
1257 
1258 	qedi_ep = qedi_conn->ep;
1259 	qedi_conn->cmd_cleanup_req = 0;
1260 	atomic_set(&qedi_conn->cmd_cleanup_cmpl, 0);
1261 
1262 	if (!qedi_ep) {
1263 		QEDI_WARN(&qedi->dbg_ctx,
1264 			  "Cannot proceed, ep already disconnected, cid=0x%x\n",
1265 			  qedi_conn->iscsi_conn_id);
1266 		return;
1267 	}
1268 
1269 	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1270 		  "Clearing SQ for cid=0x%x, conn=%p, ep=%p\n",
1271 		  qedi_conn->iscsi_conn_id, qedi_conn, qedi_ep);
1272 
1273 	qedi_ops->clear_sq(qedi->cdev, qedi_ep->handle);
1274 
1275 	rval = qedi_cleanup_all_io(qedi, qedi_conn, task, true);
1276 	if (rval) {
1277 		QEDI_ERR(&qedi->dbg_ctx,
1278 			 "fatal error, need hard reset, cid=0x%x\n",
1279 			 qedi_conn->iscsi_conn_id);
1280 		WARN_ON(1);
1281 	}
1282 }
1283 
qedi_wait_for_cleanup_request(struct qedi_ctx * qedi,struct qedi_conn * qedi_conn,struct iscsi_task * task,struct qedi_cmd * qedi_cmd,struct qedi_work_map * list_work)1284 static int qedi_wait_for_cleanup_request(struct qedi_ctx *qedi,
1285 					 struct qedi_conn *qedi_conn,
1286 					 struct iscsi_task *task,
1287 					 struct qedi_cmd *qedi_cmd,
1288 					 struct qedi_work_map *list_work)
1289 {
1290 	struct qedi_cmd *cmd = (struct qedi_cmd *)task->dd_data;
1291 	int wait;
1292 
1293 	wait  = wait_event_interruptible_timeout(qedi_conn->wait_queue,
1294 						 ((qedi_cmd->state ==
1295 						   CLEANUP_RECV) ||
1296 						 ((qedi_cmd->type == TYPEIO) &&
1297 						  (cmd->state ==
1298 						   RESPONSE_RECEIVED))),
1299 						 5 * HZ);
1300 	if (!wait) {
1301 		qedi_cmd->state = CLEANUP_WAIT_FAILED;
1302 
1303 		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1304 			  "Cleanup timedout tid=0x%x, issue connection recovery, cid=0x%x\n",
1305 			  cmd->task_id, qedi_conn->iscsi_conn_id);
1306 
1307 		return -1;
1308 	}
1309 	return 0;
1310 }
1311 
qedi_abort_work(struct work_struct * work)1312 static void qedi_abort_work(struct work_struct *work)
1313 {
1314 	struct qedi_cmd *qedi_cmd =
1315 		container_of(work, struct qedi_cmd, tmf_work);
1316 	struct qedi_conn *qedi_conn = qedi_cmd->conn;
1317 	struct qedi_ctx *qedi = qedi_conn->qedi;
1318 	struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
1319 	struct qedi_work_map *list_work = NULL;
1320 	struct iscsi_task *mtask;
1321 	struct qedi_cmd *cmd;
1322 	struct iscsi_task *ctask;
1323 	struct iscsi_tm *tmf_hdr;
1324 	s16 rval = 0;
1325 
1326 	mtask = qedi_cmd->task;
1327 	tmf_hdr = (struct iscsi_tm *)mtask->hdr;
1328 
1329 	spin_lock_bh(&conn->session->back_lock);
1330 	ctask = iscsi_itt_to_ctask(conn, tmf_hdr->rtt);
1331 	if (!ctask) {
1332 		spin_unlock_bh(&conn->session->back_lock);
1333 		QEDI_ERR(&qedi->dbg_ctx, "Invalid RTT. Letting abort timeout.\n");
1334 		goto clear_cleanup;
1335 	}
1336 
1337 	if (iscsi_task_is_completed(ctask)) {
1338 		spin_unlock_bh(&conn->session->back_lock);
1339 		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1340 			  "Task already completed\n");
1341 		/*
1342 		 * We have to still send the TMF because libiscsi needs the
1343 		 * response to avoid a timeout.
1344 		 */
1345 		goto send_tmf;
1346 	}
1347 	spin_unlock_bh(&conn->session->back_lock);
1348 
1349 	cmd = (struct qedi_cmd *)ctask->dd_data;
1350 	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1351 		  "Abort tmf rtt=0x%x, cmd itt=0x%x, cmd tid=0x%x, cid=0x%x\n",
1352 		  get_itt(tmf_hdr->rtt), get_itt(ctask->itt), cmd->task_id,
1353 		  qedi_conn->iscsi_conn_id);
1354 
1355 	if (qedi_do_not_recover) {
1356 		QEDI_ERR(&qedi->dbg_ctx, "DONT SEND CLEANUP/ABORT %d\n",
1357 			 qedi_do_not_recover);
1358 		goto clear_cleanup;
1359 	}
1360 
1361 	list_work = kzalloc(sizeof(*list_work), GFP_NOIO);
1362 	if (!list_work) {
1363 		QEDI_ERR(&qedi->dbg_ctx, "Memory allocation failed\n");
1364 		goto clear_cleanup;
1365 	}
1366 
1367 	qedi_cmd->type = TYPEIO;
1368 	qedi_cmd->state = CLEANUP_WAIT;
1369 	list_work->qedi_cmd = qedi_cmd;
1370 	list_work->rtid = cmd->task_id;
1371 	list_work->state = QEDI_WORK_SCHEDULED;
1372 	list_work->ctask = ctask;
1373 	qedi_cmd->list_tmf_work = list_work;
1374 
1375 	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1376 		  "Queue tmf work=%p, list node=%p, cid=0x%x, tmf flags=0x%x\n",
1377 		  list_work->ptr_tmf_work, list_work, qedi_conn->iscsi_conn_id,
1378 		  tmf_hdr->flags);
1379 
1380 	spin_lock_bh(&qedi_conn->tmf_work_lock);
1381 	list_add_tail(&list_work->list, &qedi_conn->tmf_work_list);
1382 	spin_unlock_bh(&qedi_conn->tmf_work_lock);
1383 
1384 	qedi_iscsi_cleanup_task(ctask, false);
1385 
1386 	rval = qedi_wait_for_cleanup_request(qedi, qedi_conn, ctask, qedi_cmd,
1387 					     list_work);
1388 	if (rval == -1) {
1389 		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1390 			  "FW cleanup got escalated, cid=0x%x\n",
1391 			  qedi_conn->iscsi_conn_id);
1392 		goto ldel_exit;
1393 	}
1394 
1395 send_tmf:
1396 	send_iscsi_tmf(qedi_conn, qedi_cmd->task, ctask);
1397 	goto clear_cleanup;
1398 
1399 ldel_exit:
1400 	spin_lock_bh(&qedi_conn->tmf_work_lock);
1401 	if (qedi_cmd->list_tmf_work) {
1402 		list_del_init(&list_work->list);
1403 		qedi_cmd->list_tmf_work = NULL;
1404 		kfree(list_work);
1405 	}
1406 	spin_unlock_bh(&qedi_conn->tmf_work_lock);
1407 
1408 	spin_lock(&qedi_conn->list_lock);
1409 	if (likely(cmd->io_cmd_in_list)) {
1410 		cmd->io_cmd_in_list = false;
1411 		list_del_init(&cmd->io_cmd);
1412 		qedi_conn->active_cmd_count--;
1413 	}
1414 	spin_unlock(&qedi_conn->list_lock);
1415 
1416 clear_cleanup:
1417 	spin_lock(&qedi_conn->tmf_work_lock);
1418 	qedi_conn->fw_cleanup_works--;
1419 	spin_unlock(&qedi_conn->tmf_work_lock);
1420 }
1421 
send_iscsi_tmf(struct qedi_conn * qedi_conn,struct iscsi_task * mtask,struct iscsi_task * ctask)1422 static int send_iscsi_tmf(struct qedi_conn *qedi_conn, struct iscsi_task *mtask,
1423 			  struct iscsi_task *ctask)
1424 {
1425 	struct iscsi_tmf_request_hdr tmf_pdu_header;
1426 	struct iscsi_task_params task_params;
1427 	struct qedi_ctx *qedi = qedi_conn->qedi;
1428 	struct iscsi_task_context *fw_task_ctx;
1429 	struct iscsi_tm *tmf_hdr;
1430 	struct qedi_cmd *qedi_cmd;
1431 	struct qedi_cmd *cmd;
1432 	struct qedi_endpoint *ep;
1433 	u32 scsi_lun[2];
1434 	s16 tid = 0;
1435 	u16 sq_idx = 0;
1436 
1437 	tmf_hdr = (struct iscsi_tm *)mtask->hdr;
1438 	qedi_cmd = (struct qedi_cmd *)mtask->dd_data;
1439 	ep = qedi_conn->ep;
1440 	if (!ep)
1441 		return -ENODEV;
1442 
1443 	tid = qedi_get_task_idx(qedi);
1444 	if (tid == -1)
1445 		return -ENOMEM;
1446 
1447 	fw_task_ctx =
1448 	     (struct iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
1449 							       tid);
1450 	memset(fw_task_ctx, 0, sizeof(struct iscsi_task_context));
1451 
1452 	qedi_cmd->task_id = tid;
1453 
1454 	memset(&task_params, 0, sizeof(task_params));
1455 	memset(&tmf_pdu_header, 0, sizeof(tmf_pdu_header));
1456 
1457 	/* Update header info */
1458 	qedi_update_itt_map(qedi, tid, mtask->itt, qedi_cmd);
1459 	tmf_pdu_header.itt = qedi_set_itt(tid, get_itt(mtask->itt));
1460 	tmf_pdu_header.cmd_sn = be32_to_cpu(tmf_hdr->cmdsn);
1461 
1462 	memcpy(scsi_lun, &tmf_hdr->lun, sizeof(struct scsi_lun));
1463 	tmf_pdu_header.lun.lo = be32_to_cpu(scsi_lun[0]);
1464 	tmf_pdu_header.lun.hi = be32_to_cpu(scsi_lun[1]);
1465 
1466 	if ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
1467 	     ISCSI_TM_FUNC_ABORT_TASK) {
1468 		cmd = (struct qedi_cmd *)ctask->dd_data;
1469 		tmf_pdu_header.rtt =
1470 				qedi_set_itt(cmd->task_id,
1471 					     get_itt(tmf_hdr->rtt));
1472 	} else {
1473 		tmf_pdu_header.rtt = ISCSI_RESERVED_TAG;
1474 	}
1475 
1476 	tmf_pdu_header.opcode = tmf_hdr->opcode;
1477 	tmf_pdu_header.function = tmf_hdr->flags;
1478 	tmf_pdu_header.hdr_second_dword = ntoh24(tmf_hdr->dlength);
1479 	tmf_pdu_header.ref_cmd_sn = be32_to_cpu(tmf_hdr->refcmdsn);
1480 
1481 	/* Fill fw input params */
1482 	task_params.context = fw_task_ctx;
1483 	task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
1484 	task_params.itid = tid;
1485 	task_params.cq_rss_number = 0;
1486 	task_params.tx_io_size = 0;
1487 	task_params.rx_io_size = 0;
1488 
1489 	sq_idx = qedi_get_wqe_idx(qedi_conn);
1490 	task_params.sqe = &ep->sq[sq_idx];
1491 
1492 	memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
1493 	init_initiator_tmf_request_task(&task_params, &tmf_pdu_header);
1494 
1495 	spin_lock(&qedi_conn->list_lock);
1496 	list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
1497 	qedi_cmd->io_cmd_in_list = true;
1498 	qedi_conn->active_cmd_count++;
1499 	spin_unlock(&qedi_conn->list_lock);
1500 
1501 	qedi_ring_doorbell(qedi_conn);
1502 	return 0;
1503 }
1504 
qedi_send_iscsi_tmf(struct qedi_conn * qedi_conn,struct iscsi_task * mtask)1505 int qedi_send_iscsi_tmf(struct qedi_conn *qedi_conn, struct iscsi_task *mtask)
1506 {
1507 	struct iscsi_tm *tmf_hdr = (struct iscsi_tm *)mtask->hdr;
1508 	struct qedi_cmd *qedi_cmd = mtask->dd_data;
1509 	struct qedi_ctx *qedi = qedi_conn->qedi;
1510 	int rc = 0;
1511 
1512 	switch (tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) {
1513 	case ISCSI_TM_FUNC_ABORT_TASK:
1514 		spin_lock(&qedi_conn->tmf_work_lock);
1515 		qedi_conn->fw_cleanup_works++;
1516 		spin_unlock(&qedi_conn->tmf_work_lock);
1517 
1518 		INIT_WORK(&qedi_cmd->tmf_work, qedi_abort_work);
1519 		queue_work(qedi->tmf_thread, &qedi_cmd->tmf_work);
1520 		break;
1521 	case ISCSI_TM_FUNC_LOGICAL_UNIT_RESET:
1522 	case ISCSI_TM_FUNC_TARGET_WARM_RESET:
1523 	case ISCSI_TM_FUNC_TARGET_COLD_RESET:
1524 		rc = send_iscsi_tmf(qedi_conn, mtask, NULL);
1525 		break;
1526 	default:
1527 		QEDI_ERR(&qedi->dbg_ctx, "Invalid tmf, cid=0x%x\n",
1528 			 qedi_conn->iscsi_conn_id);
1529 		return -EINVAL;
1530 	}
1531 
1532 	return rc;
1533 }
1534 
qedi_send_iscsi_text(struct qedi_conn * qedi_conn,struct iscsi_task * task)1535 int qedi_send_iscsi_text(struct qedi_conn *qedi_conn,
1536 			 struct iscsi_task *task)
1537 {
1538 	struct iscsi_text_request_hdr text_request_pdu_header;
1539 	struct scsi_sgl_task_params tx_sgl_task_params;
1540 	struct scsi_sgl_task_params rx_sgl_task_params;
1541 	struct iscsi_task_params task_params;
1542 	struct iscsi_task_context *fw_task_ctx;
1543 	struct qedi_ctx *qedi = qedi_conn->qedi;
1544 	struct iscsi_text *text_hdr;
1545 	struct scsi_sge *req_sge = NULL;
1546 	struct scsi_sge *resp_sge = NULL;
1547 	struct qedi_cmd *qedi_cmd;
1548 	struct qedi_endpoint *ep;
1549 	s16 tid = 0;
1550 	u16 sq_idx = 0;
1551 	int rval = 0;
1552 
1553 	req_sge = (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
1554 	resp_sge = (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1555 	qedi_cmd = (struct qedi_cmd *)task->dd_data;
1556 	text_hdr = (struct iscsi_text *)task->hdr;
1557 	ep = qedi_conn->ep;
1558 
1559 	tid = qedi_get_task_idx(qedi);
1560 	if (tid == -1)
1561 		return -ENOMEM;
1562 
1563 	fw_task_ctx =
1564 	     (struct iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
1565 							       tid);
1566 	memset(fw_task_ctx, 0, sizeof(struct iscsi_task_context));
1567 
1568 	qedi_cmd->task_id = tid;
1569 
1570 	memset(&task_params, 0, sizeof(task_params));
1571 	memset(&text_request_pdu_header, 0, sizeof(text_request_pdu_header));
1572 	memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params));
1573 	memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params));
1574 
1575 	/* Update header info */
1576 	text_request_pdu_header.opcode = text_hdr->opcode;
1577 	text_request_pdu_header.flags_attr = text_hdr->flags;
1578 
1579 	qedi_update_itt_map(qedi, tid, task->itt, qedi_cmd);
1580 	text_request_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt));
1581 	text_request_pdu_header.ttt = text_hdr->ttt;
1582 	text_request_pdu_header.cmd_sn = be32_to_cpu(text_hdr->cmdsn);
1583 	text_request_pdu_header.exp_stat_sn = be32_to_cpu(text_hdr->exp_statsn);
1584 	text_request_pdu_header.hdr_second_dword = ntoh24(text_hdr->dlength);
1585 
1586 	/* Fill tx AHS and rx buffer */
1587 	tx_sgl_task_params.sgl =
1588 			       (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
1589 	tx_sgl_task_params.sgl_phys_addr.lo =
1590 					 (u32)(qedi_conn->gen_pdu.req_dma_addr);
1591 	tx_sgl_task_params.sgl_phys_addr.hi =
1592 			      (u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32);
1593 	tx_sgl_task_params.total_buffer_size = req_sge->sge_len;
1594 	tx_sgl_task_params.num_sges = 1;
1595 
1596 	rx_sgl_task_params.sgl =
1597 			      (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1598 	rx_sgl_task_params.sgl_phys_addr.lo =
1599 					(u32)(qedi_conn->gen_pdu.resp_dma_addr);
1600 	rx_sgl_task_params.sgl_phys_addr.hi =
1601 			     (u32)((u64)qedi_conn->gen_pdu.resp_dma_addr >> 32);
1602 	rx_sgl_task_params.total_buffer_size = resp_sge->sge_len;
1603 	rx_sgl_task_params.num_sges = 1;
1604 
1605 	/* Fill fw input params */
1606 	task_params.context = fw_task_ctx;
1607 	task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
1608 	task_params.itid = tid;
1609 	task_params.cq_rss_number = 0;
1610 	task_params.tx_io_size = ntoh24(text_hdr->dlength);
1611 	task_params.rx_io_size = resp_sge->sge_len;
1612 
1613 	sq_idx = qedi_get_wqe_idx(qedi_conn);
1614 	task_params.sqe = &ep->sq[sq_idx];
1615 
1616 	memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
1617 	rval = init_initiator_text_request_task(&task_params,
1618 						&text_request_pdu_header,
1619 						&tx_sgl_task_params,
1620 						&rx_sgl_task_params);
1621 	if (rval)
1622 		return -1;
1623 
1624 	spin_lock(&qedi_conn->list_lock);
1625 	list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
1626 	qedi_cmd->io_cmd_in_list = true;
1627 	qedi_conn->active_cmd_count++;
1628 	spin_unlock(&qedi_conn->list_lock);
1629 
1630 	qedi_ring_doorbell(qedi_conn);
1631 	return 0;
1632 }
1633 
qedi_send_iscsi_nopout(struct qedi_conn * qedi_conn,struct iscsi_task * task,char * datap,int data_len,int unsol)1634 int qedi_send_iscsi_nopout(struct qedi_conn *qedi_conn,
1635 			   struct iscsi_task *task,
1636 			   char *datap, int data_len, int unsol)
1637 {
1638 	struct iscsi_nop_out_hdr nop_out_pdu_header;
1639 	struct scsi_sgl_task_params tx_sgl_task_params;
1640 	struct scsi_sgl_task_params rx_sgl_task_params;
1641 	struct iscsi_task_params task_params;
1642 	struct qedi_ctx *qedi = qedi_conn->qedi;
1643 	struct iscsi_task_context *fw_task_ctx;
1644 	struct iscsi_nopout *nopout_hdr;
1645 	struct scsi_sge *resp_sge = NULL;
1646 	struct qedi_cmd *qedi_cmd;
1647 	struct qedi_endpoint *ep;
1648 	u32 scsi_lun[2];
1649 	s16 tid = 0;
1650 	u16 sq_idx = 0;
1651 	int rval = 0;
1652 
1653 	resp_sge = (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1654 	qedi_cmd = (struct qedi_cmd *)task->dd_data;
1655 	nopout_hdr = (struct iscsi_nopout *)task->hdr;
1656 	ep = qedi_conn->ep;
1657 
1658 	tid = qedi_get_task_idx(qedi);
1659 	if (tid == -1)
1660 		return -ENOMEM;
1661 
1662 	fw_task_ctx =
1663 	     (struct iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
1664 							       tid);
1665 	memset(fw_task_ctx, 0, sizeof(struct iscsi_task_context));
1666 
1667 	qedi_cmd->task_id = tid;
1668 
1669 	memset(&task_params, 0, sizeof(task_params));
1670 	memset(&nop_out_pdu_header, 0, sizeof(nop_out_pdu_header));
1671 	memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params));
1672 	memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params));
1673 
1674 	/* Update header info */
1675 	nop_out_pdu_header.opcode = nopout_hdr->opcode;
1676 	SET_FIELD(nop_out_pdu_header.flags_attr, ISCSI_NOP_OUT_HDR_CONST1, 1);
1677 	SET_FIELD(nop_out_pdu_header.flags_attr, ISCSI_NOP_OUT_HDR_RSRV, 0);
1678 
1679 	memcpy(scsi_lun, &nopout_hdr->lun, sizeof(struct scsi_lun));
1680 	nop_out_pdu_header.lun.lo = be32_to_cpu(scsi_lun[0]);
1681 	nop_out_pdu_header.lun.hi = be32_to_cpu(scsi_lun[1]);
1682 	nop_out_pdu_header.cmd_sn = be32_to_cpu(nopout_hdr->cmdsn);
1683 	nop_out_pdu_header.exp_stat_sn = be32_to_cpu(nopout_hdr->exp_statsn);
1684 
1685 	qedi_update_itt_map(qedi, tid, task->itt, qedi_cmd);
1686 
1687 	if (nopout_hdr->ttt != ISCSI_TTT_ALL_ONES) {
1688 		nop_out_pdu_header.itt = be32_to_cpu(nopout_hdr->itt);
1689 		nop_out_pdu_header.ttt = be32_to_cpu(nopout_hdr->ttt);
1690 	} else {
1691 		nop_out_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt));
1692 		nop_out_pdu_header.ttt = ISCSI_TTT_ALL_ONES;
1693 
1694 		spin_lock(&qedi_conn->list_lock);
1695 		list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
1696 		qedi_cmd->io_cmd_in_list = true;
1697 		qedi_conn->active_cmd_count++;
1698 		spin_unlock(&qedi_conn->list_lock);
1699 	}
1700 
1701 	/* Fill tx AHS and rx buffer */
1702 	if (data_len) {
1703 		tx_sgl_task_params.sgl =
1704 			       (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
1705 		tx_sgl_task_params.sgl_phys_addr.lo =
1706 					 (u32)(qedi_conn->gen_pdu.req_dma_addr);
1707 		tx_sgl_task_params.sgl_phys_addr.hi =
1708 			      (u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32);
1709 		tx_sgl_task_params.total_buffer_size = data_len;
1710 		tx_sgl_task_params.num_sges = 1;
1711 
1712 		rx_sgl_task_params.sgl =
1713 			      (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1714 		rx_sgl_task_params.sgl_phys_addr.lo =
1715 					(u32)(qedi_conn->gen_pdu.resp_dma_addr);
1716 		rx_sgl_task_params.sgl_phys_addr.hi =
1717 			     (u32)((u64)qedi_conn->gen_pdu.resp_dma_addr >> 32);
1718 		rx_sgl_task_params.total_buffer_size = resp_sge->sge_len;
1719 		rx_sgl_task_params.num_sges = 1;
1720 	}
1721 
1722 	/* Fill fw input params */
1723 	task_params.context = fw_task_ctx;
1724 	task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
1725 	task_params.itid = tid;
1726 	task_params.cq_rss_number = 0;
1727 	task_params.tx_io_size = data_len;
1728 	task_params.rx_io_size = resp_sge->sge_len;
1729 
1730 	sq_idx = qedi_get_wqe_idx(qedi_conn);
1731 	task_params.sqe = &ep->sq[sq_idx];
1732 
1733 	memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
1734 	rval = init_initiator_nop_out_task(&task_params,
1735 					   &nop_out_pdu_header,
1736 					   &tx_sgl_task_params,
1737 					   &rx_sgl_task_params);
1738 	if (rval)
1739 		return -1;
1740 
1741 	qedi_ring_doorbell(qedi_conn);
1742 	return 0;
1743 }
1744 
qedi_split_bd(struct qedi_cmd * cmd,u64 addr,int sg_len,int bd_index)1745 static int qedi_split_bd(struct qedi_cmd *cmd, u64 addr, int sg_len,
1746 			 int bd_index)
1747 {
1748 	struct scsi_sge *bd = cmd->io_tbl.sge_tbl;
1749 	int frag_size, sg_frags;
1750 
1751 	sg_frags = 0;
1752 
1753 	while (sg_len) {
1754 		if (addr % QEDI_PAGE_SIZE)
1755 			frag_size =
1756 				   (QEDI_PAGE_SIZE - (addr % QEDI_PAGE_SIZE));
1757 		else
1758 			frag_size = (sg_len > QEDI_BD_SPLIT_SZ) ? 0 :
1759 				    (sg_len % QEDI_BD_SPLIT_SZ);
1760 
1761 		if (frag_size == 0)
1762 			frag_size = QEDI_BD_SPLIT_SZ;
1763 
1764 		bd[bd_index + sg_frags].sge_addr.lo = (addr & 0xffffffff);
1765 		bd[bd_index + sg_frags].sge_addr.hi = (addr >> 32);
1766 		bd[bd_index + sg_frags].sge_len = (u16)frag_size;
1767 		QEDI_INFO(&cmd->conn->qedi->dbg_ctx, QEDI_LOG_IO,
1768 			  "split sge %d: addr=%llx, len=%x",
1769 			  (bd_index + sg_frags), addr, frag_size);
1770 
1771 		addr += (u64)frag_size;
1772 		sg_frags++;
1773 		sg_len -= frag_size;
1774 	}
1775 	return sg_frags;
1776 }
1777 
qedi_map_scsi_sg(struct qedi_ctx * qedi,struct qedi_cmd * cmd)1778 static int qedi_map_scsi_sg(struct qedi_ctx *qedi, struct qedi_cmd *cmd)
1779 {
1780 	struct scsi_cmnd *sc = cmd->scsi_cmd;
1781 	struct scsi_sge *bd = cmd->io_tbl.sge_tbl;
1782 	struct scatterlist *sg;
1783 	int byte_count = 0;
1784 	int bd_count = 0;
1785 	int sg_count;
1786 	int sg_len;
1787 	int sg_frags;
1788 	u64 addr, end_addr;
1789 	int i;
1790 
1791 	WARN_ON(scsi_sg_count(sc) > QEDI_ISCSI_MAX_BDS_PER_CMD);
1792 
1793 	sg_count = dma_map_sg(&qedi->pdev->dev, scsi_sglist(sc),
1794 			      scsi_sg_count(sc), sc->sc_data_direction);
1795 
1796 	/*
1797 	 * New condition to send single SGE as cached-SGL.
1798 	 * Single SGE with length less than 64K.
1799 	 */
1800 	sg = scsi_sglist(sc);
1801 	if ((sg_count == 1) && (sg_dma_len(sg) <= MAX_SGLEN_FOR_CACHESGL)) {
1802 		sg_len = sg_dma_len(sg);
1803 		addr = (u64)sg_dma_address(sg);
1804 
1805 		bd[bd_count].sge_addr.lo = (addr & 0xffffffff);
1806 		bd[bd_count].sge_addr.hi = (addr >> 32);
1807 		bd[bd_count].sge_len = (u16)sg_len;
1808 
1809 		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO,
1810 			  "single-cached-sgl: bd_count:%d addr=%llx, len=%x",
1811 			  sg_count, addr, sg_len);
1812 
1813 		return ++bd_count;
1814 	}
1815 
1816 	scsi_for_each_sg(sc, sg, sg_count, i) {
1817 		sg_len = sg_dma_len(sg);
1818 		addr = (u64)sg_dma_address(sg);
1819 		end_addr = (addr + sg_len);
1820 
1821 		/*
1822 		 * first sg elem in the 'list',
1823 		 * check if end addr is page-aligned.
1824 		 */
1825 		if ((i == 0) && (sg_count > 1) && (end_addr % QEDI_PAGE_SIZE))
1826 			cmd->use_slowpath = true;
1827 
1828 		/*
1829 		 * last sg elem in the 'list',
1830 		 * check if start addr is page-aligned.
1831 		 */
1832 		else if ((i == (sg_count - 1)) &&
1833 			 (sg_count > 1) && (addr % QEDI_PAGE_SIZE))
1834 			cmd->use_slowpath = true;
1835 
1836 		/*
1837 		 * middle sg elements in list,
1838 		 * check if start and end addr is page-aligned
1839 		 */
1840 		else if ((i != 0) && (i != (sg_count - 1)) &&
1841 			 ((addr % QEDI_PAGE_SIZE) ||
1842 			 (end_addr % QEDI_PAGE_SIZE)))
1843 			cmd->use_slowpath = true;
1844 
1845 		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO, "sg[%d] size=0x%x",
1846 			  i, sg_len);
1847 
1848 		if (sg_len > QEDI_BD_SPLIT_SZ) {
1849 			sg_frags = qedi_split_bd(cmd, addr, sg_len, bd_count);
1850 		} else {
1851 			sg_frags = 1;
1852 			bd[bd_count].sge_addr.lo = addr & 0xffffffff;
1853 			bd[bd_count].sge_addr.hi = addr >> 32;
1854 			bd[bd_count].sge_len = sg_len;
1855 		}
1856 		byte_count += sg_len;
1857 		bd_count += sg_frags;
1858 	}
1859 
1860 	if (byte_count != scsi_bufflen(sc))
1861 		QEDI_ERR(&qedi->dbg_ctx,
1862 			 "byte_count = %d != scsi_bufflen = %d\n", byte_count,
1863 			 scsi_bufflen(sc));
1864 	else
1865 		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO, "byte_count = %d\n",
1866 			  byte_count);
1867 
1868 	WARN_ON(byte_count != scsi_bufflen(sc));
1869 
1870 	return bd_count;
1871 }
1872 
qedi_iscsi_map_sg_list(struct qedi_cmd * cmd)1873 static void qedi_iscsi_map_sg_list(struct qedi_cmd *cmd)
1874 {
1875 	int bd_count;
1876 	struct scsi_cmnd *sc = cmd->scsi_cmd;
1877 
1878 	if (scsi_sg_count(sc)) {
1879 		bd_count  = qedi_map_scsi_sg(cmd->conn->qedi, cmd);
1880 		if (bd_count == 0)
1881 			return;
1882 	} else {
1883 		struct scsi_sge *bd = cmd->io_tbl.sge_tbl;
1884 
1885 		bd[0].sge_addr.lo = 0;
1886 		bd[0].sge_addr.hi = 0;
1887 		bd[0].sge_len = 0;
1888 		bd_count = 0;
1889 	}
1890 	cmd->io_tbl.sge_valid = bd_count;
1891 }
1892 
qedi_cpy_scsi_cdb(struct scsi_cmnd * sc,u32 * dstp)1893 static void qedi_cpy_scsi_cdb(struct scsi_cmnd *sc, u32 *dstp)
1894 {
1895 	u32 dword;
1896 	int lpcnt;
1897 	u8 *srcp;
1898 
1899 	lpcnt = sc->cmd_len / sizeof(dword);
1900 	srcp = (u8 *)sc->cmnd;
1901 	while (lpcnt--) {
1902 		memcpy(&dword, (const void *)srcp, 4);
1903 		*dstp = cpu_to_be32(dword);
1904 		srcp += 4;
1905 		dstp++;
1906 	}
1907 	if (sc->cmd_len & 0x3) {
1908 		dword = (u32)srcp[0] | ((u32)srcp[1] << 8);
1909 		*dstp = cpu_to_be32(dword);
1910 	}
1911 }
1912 
qedi_trace_io(struct qedi_ctx * qedi,struct iscsi_task * task,u16 tid,int8_t direction)1913 void qedi_trace_io(struct qedi_ctx *qedi, struct iscsi_task *task,
1914 		   u16 tid, int8_t direction)
1915 {
1916 	struct qedi_io_log *io_log;
1917 	struct iscsi_conn *conn = task->conn;
1918 	struct qedi_conn *qedi_conn = conn->dd_data;
1919 	struct scsi_cmnd *sc_cmd = task->sc;
1920 	unsigned long flags;
1921 
1922 	spin_lock_irqsave(&qedi->io_trace_lock, flags);
1923 
1924 	io_log = &qedi->io_trace_buf[qedi->io_trace_idx];
1925 	io_log->direction = direction;
1926 	io_log->task_id = tid;
1927 	io_log->cid = qedi_conn->iscsi_conn_id;
1928 	io_log->lun = sc_cmd->device->lun;
1929 	io_log->op = sc_cmd->cmnd[0];
1930 	io_log->lba[0] = sc_cmd->cmnd[2];
1931 	io_log->lba[1] = sc_cmd->cmnd[3];
1932 	io_log->lba[2] = sc_cmd->cmnd[4];
1933 	io_log->lba[3] = sc_cmd->cmnd[5];
1934 	io_log->bufflen = scsi_bufflen(sc_cmd);
1935 	io_log->sg_count = scsi_sg_count(sc_cmd);
1936 	io_log->fast_sgs = qedi->fast_sgls;
1937 	io_log->cached_sgs = qedi->cached_sgls;
1938 	io_log->slow_sgs = qedi->slow_sgls;
1939 	io_log->cached_sge = qedi->use_cached_sge;
1940 	io_log->slow_sge = qedi->use_slow_sge;
1941 	io_log->fast_sge = qedi->use_fast_sge;
1942 	io_log->result = sc_cmd->result;
1943 	io_log->jiffies = jiffies;
1944 	io_log->blk_req_cpu = smp_processor_id();
1945 
1946 	if (direction == QEDI_IO_TRACE_REQ) {
1947 		/* For requests we only care about the submission CPU */
1948 		io_log->req_cpu = smp_processor_id() % qedi->num_queues;
1949 		io_log->intr_cpu = 0;
1950 		io_log->blk_rsp_cpu = 0;
1951 	} else if (direction == QEDI_IO_TRACE_RSP) {
1952 		io_log->req_cpu = smp_processor_id() % qedi->num_queues;
1953 		io_log->intr_cpu = qedi->intr_cpu;
1954 		io_log->blk_rsp_cpu = smp_processor_id();
1955 	}
1956 
1957 	qedi->io_trace_idx++;
1958 	if (qedi->io_trace_idx == QEDI_IO_TRACE_SIZE)
1959 		qedi->io_trace_idx = 0;
1960 
1961 	qedi->use_cached_sge = false;
1962 	qedi->use_slow_sge = false;
1963 	qedi->use_fast_sge = false;
1964 
1965 	spin_unlock_irqrestore(&qedi->io_trace_lock, flags);
1966 }
1967 
qedi_iscsi_send_ioreq(struct iscsi_task * task)1968 int qedi_iscsi_send_ioreq(struct iscsi_task *task)
1969 {
1970 	struct iscsi_conn *conn = task->conn;
1971 	struct iscsi_session *session = conn->session;
1972 	struct Scsi_Host *shost = iscsi_session_to_shost(session->cls_session);
1973 	struct qedi_ctx *qedi = iscsi_host_priv(shost);
1974 	struct qedi_conn *qedi_conn = conn->dd_data;
1975 	struct qedi_cmd *cmd = task->dd_data;
1976 	struct scsi_cmnd *sc = task->sc;
1977 	struct iscsi_cmd_hdr cmd_pdu_header;
1978 	struct scsi_sgl_task_params tx_sgl_task_params;
1979 	struct scsi_sgl_task_params rx_sgl_task_params;
1980 	struct scsi_sgl_task_params *prx_sgl = NULL;
1981 	struct scsi_sgl_task_params *ptx_sgl = NULL;
1982 	struct iscsi_task_params task_params;
1983 	struct iscsi_conn_params conn_params;
1984 	struct scsi_initiator_cmd_params cmd_params;
1985 	struct iscsi_task_context *fw_task_ctx;
1986 	struct iscsi_cls_conn *cls_conn;
1987 	struct iscsi_scsi_req *hdr = (struct iscsi_scsi_req *)task->hdr;
1988 	enum iscsi_task_type task_type = MAX_ISCSI_TASK_TYPE;
1989 	struct qedi_endpoint *ep;
1990 	u32 scsi_lun[2];
1991 	s16 tid = 0;
1992 	u16 sq_idx = 0;
1993 	u16 cq_idx;
1994 	int rval = 0;
1995 
1996 	ep = qedi_conn->ep;
1997 	cls_conn = qedi_conn->cls_conn;
1998 	conn = cls_conn->dd_data;
1999 
2000 	qedi_iscsi_map_sg_list(cmd);
2001 	int_to_scsilun(sc->device->lun, (struct scsi_lun *)scsi_lun);
2002 
2003 	tid = qedi_get_task_idx(qedi);
2004 	if (tid == -1)
2005 		return -ENOMEM;
2006 
2007 	fw_task_ctx =
2008 	     (struct iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
2009 							       tid);
2010 	memset(fw_task_ctx, 0, sizeof(struct iscsi_task_context));
2011 
2012 	cmd->task_id = tid;
2013 
2014 	memset(&task_params, 0, sizeof(task_params));
2015 	memset(&cmd_pdu_header, 0, sizeof(cmd_pdu_header));
2016 	memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params));
2017 	memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params));
2018 	memset(&conn_params, 0, sizeof(conn_params));
2019 	memset(&cmd_params, 0, sizeof(cmd_params));
2020 
2021 	cq_idx = smp_processor_id() % qedi->num_queues;
2022 	/* Update header info */
2023 	SET_FIELD(cmd_pdu_header.flags_attr, ISCSI_CMD_HDR_ATTR,
2024 		  ISCSI_ATTR_SIMPLE);
2025 	if (hdr->cdb[0] != TEST_UNIT_READY) {
2026 		if (sc->sc_data_direction == DMA_TO_DEVICE) {
2027 			SET_FIELD(cmd_pdu_header.flags_attr,
2028 				  ISCSI_CMD_HDR_WRITE, 1);
2029 			task_type = ISCSI_TASK_TYPE_INITIATOR_WRITE;
2030 		} else {
2031 			SET_FIELD(cmd_pdu_header.flags_attr,
2032 				  ISCSI_CMD_HDR_READ, 1);
2033 			task_type = ISCSI_TASK_TYPE_INITIATOR_READ;
2034 		}
2035 	}
2036 
2037 	cmd_pdu_header.lun.lo = be32_to_cpu(scsi_lun[0]);
2038 	cmd_pdu_header.lun.hi = be32_to_cpu(scsi_lun[1]);
2039 
2040 	qedi_update_itt_map(qedi, tid, task->itt, cmd);
2041 	cmd_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt));
2042 	cmd_pdu_header.expected_transfer_length = cpu_to_be32(hdr->data_length);
2043 	cmd_pdu_header.hdr_second_dword = ntoh24(hdr->dlength);
2044 	cmd_pdu_header.cmd_sn = be32_to_cpu(hdr->cmdsn);
2045 	cmd_pdu_header.hdr_first_byte = hdr->opcode;
2046 	qedi_cpy_scsi_cdb(sc, (u32 *)cmd_pdu_header.cdb);
2047 
2048 	/* Fill tx AHS and rx buffer */
2049 	if (task_type == ISCSI_TASK_TYPE_INITIATOR_WRITE) {
2050 		tx_sgl_task_params.sgl = cmd->io_tbl.sge_tbl;
2051 		tx_sgl_task_params.sgl_phys_addr.lo =
2052 						 (u32)(cmd->io_tbl.sge_tbl_dma);
2053 		tx_sgl_task_params.sgl_phys_addr.hi =
2054 				      (u32)((u64)cmd->io_tbl.sge_tbl_dma >> 32);
2055 		tx_sgl_task_params.total_buffer_size = scsi_bufflen(sc);
2056 		tx_sgl_task_params.num_sges = cmd->io_tbl.sge_valid;
2057 		if (cmd->use_slowpath)
2058 			tx_sgl_task_params.small_mid_sge = true;
2059 	} else if (task_type == ISCSI_TASK_TYPE_INITIATOR_READ) {
2060 		rx_sgl_task_params.sgl = cmd->io_tbl.sge_tbl;
2061 		rx_sgl_task_params.sgl_phys_addr.lo =
2062 						 (u32)(cmd->io_tbl.sge_tbl_dma);
2063 		rx_sgl_task_params.sgl_phys_addr.hi =
2064 				      (u32)((u64)cmd->io_tbl.sge_tbl_dma >> 32);
2065 		rx_sgl_task_params.total_buffer_size = scsi_bufflen(sc);
2066 		rx_sgl_task_params.num_sges = cmd->io_tbl.sge_valid;
2067 	}
2068 
2069 	/* Add conn param */
2070 	conn_params.first_burst_length = conn->session->first_burst;
2071 	conn_params.max_send_pdu_length = conn->max_xmit_dlength;
2072 	conn_params.max_burst_length = conn->session->max_burst;
2073 	if (conn->session->initial_r2t_en)
2074 		conn_params.initial_r2t = true;
2075 	if (conn->session->imm_data_en)
2076 		conn_params.immediate_data = true;
2077 
2078 	/* Add cmd params */
2079 	cmd_params.sense_data_buffer_phys_addr.lo = (u32)cmd->sense_buffer_dma;
2080 	cmd_params.sense_data_buffer_phys_addr.hi =
2081 					(u32)((u64)cmd->sense_buffer_dma >> 32);
2082 	/* Fill fw input params */
2083 	task_params.context = fw_task_ctx;
2084 	task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
2085 	task_params.itid = tid;
2086 	task_params.cq_rss_number = cq_idx;
2087 	if (task_type == ISCSI_TASK_TYPE_INITIATOR_WRITE)
2088 		task_params.tx_io_size = scsi_bufflen(sc);
2089 	else if (task_type == ISCSI_TASK_TYPE_INITIATOR_READ)
2090 		task_params.rx_io_size = scsi_bufflen(sc);
2091 
2092 	sq_idx = qedi_get_wqe_idx(qedi_conn);
2093 	task_params.sqe = &ep->sq[sq_idx];
2094 
2095 	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO,
2096 		  "%s: %s-SGL: sg_len=0x%x num_sges=0x%x first-sge-lo=0x%x first-sge-hi=0x%x\n",
2097 		  (task_type == ISCSI_TASK_TYPE_INITIATOR_WRITE) ?
2098 		  "Write " : "Read ", (cmd->io_tbl.sge_valid == 1) ?
2099 		  "Single" : (cmd->use_slowpath ? "SLOW" : "FAST"),
2100 		  (u16)cmd->io_tbl.sge_valid, scsi_bufflen(sc),
2101 		  (u32)(cmd->io_tbl.sge_tbl_dma),
2102 		  (u32)((u64)cmd->io_tbl.sge_tbl_dma >> 32));
2103 
2104 	memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
2105 
2106 	if (task_params.tx_io_size != 0)
2107 		ptx_sgl = &tx_sgl_task_params;
2108 	if (task_params.rx_io_size != 0)
2109 		prx_sgl = &rx_sgl_task_params;
2110 
2111 	rval = init_initiator_rw_iscsi_task(&task_params, &conn_params,
2112 					    &cmd_params, &cmd_pdu_header,
2113 					    ptx_sgl, prx_sgl,
2114 					    NULL);
2115 	if (rval)
2116 		return -1;
2117 
2118 	spin_lock(&qedi_conn->list_lock);
2119 	list_add_tail(&cmd->io_cmd, &qedi_conn->active_cmd_list);
2120 	cmd->io_cmd_in_list = true;
2121 	qedi_conn->active_cmd_count++;
2122 	spin_unlock(&qedi_conn->list_lock);
2123 
2124 	qedi_ring_doorbell(qedi_conn);
2125 	return 0;
2126 }
2127 
qedi_iscsi_cleanup_task(struct iscsi_task * task,bool mark_cmd_node_deleted)2128 int qedi_iscsi_cleanup_task(struct iscsi_task *task, bool mark_cmd_node_deleted)
2129 {
2130 	struct iscsi_task_params task_params;
2131 	struct qedi_endpoint *ep;
2132 	struct iscsi_conn *conn = task->conn;
2133 	struct qedi_conn *qedi_conn = conn->dd_data;
2134 	struct qedi_cmd *cmd = task->dd_data;
2135 	u16 sq_idx = 0;
2136 	int rval = 0;
2137 
2138 	QEDI_INFO(&qedi_conn->qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
2139 		  "issue cleanup tid=0x%x itt=0x%x task_state=%d cmd_state=0%x cid=0x%x\n",
2140 		  cmd->task_id, get_itt(task->itt), task->state,
2141 		  cmd->state, qedi_conn->iscsi_conn_id);
2142 
2143 	memset(&task_params, 0, sizeof(task_params));
2144 	ep = qedi_conn->ep;
2145 
2146 	sq_idx = qedi_get_wqe_idx(qedi_conn);
2147 
2148 	task_params.sqe = &ep->sq[sq_idx];
2149 	memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
2150 	task_params.itid = cmd->task_id;
2151 
2152 	rval = init_cleanup_task(&task_params);
2153 	if (rval)
2154 		return rval;
2155 
2156 	qedi_ring_doorbell(qedi_conn);
2157 	return 0;
2158 }
2159