1 /* bnx2i_hwi.c: QLogic NetXtreme II iSCSI driver.
2  *
3  * Copyright (c) 2006 - 2013 Broadcom Corporation
4  * Copyright (c) 2007, 2008 Red Hat, Inc.  All rights reserved.
5  * Copyright (c) 2007, 2008 Mike Christie
6  * Copyright (c) 2014, QLogic Corporation
7  *
8  * This program is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License as published by
10  * the Free Software Foundation.
11  *
12  * Written by: Anil Veerabhadrappa (anilgv@broadcom.com)
13  * Previously Maintained by: Eddie Wai (eddie.wai@broadcom.com)
14  * Maintained by: QLogic-Storage-Upstream@qlogic.com
15  */
16 
17 #include <linux/gfp.h>
18 #include <scsi/scsi_tcq.h>
19 #include <scsi/libiscsi.h>
20 #include "bnx2i.h"
21 
22 DECLARE_PER_CPU(struct bnx2i_percpu_s, bnx2i_percpu);
23 
24 /**
25  * bnx2i_get_cid_num - get cid from ep
26  * @ep: 	endpoint pointer
27  *
28  * Only applicable to 57710 family of devices
29  */
bnx2i_get_cid_num(struct bnx2i_endpoint * ep)30 static u32 bnx2i_get_cid_num(struct bnx2i_endpoint *ep)
31 {
32 	u32 cid;
33 
34 	if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
35 		cid = ep->ep_cid;
36 	else
37 		cid = GET_CID_NUM(ep->ep_cid);
38 	return cid;
39 }
40 
41 
42 /**
43  * bnx2i_adjust_qp_size - Adjust SQ/RQ/CQ size for 57710 device type
44  * @hba: 		Adapter for which adjustments is to be made
45  *
46  * Only applicable to 57710 family of devices
47  */
bnx2i_adjust_qp_size(struct bnx2i_hba * hba)48 static void bnx2i_adjust_qp_size(struct bnx2i_hba *hba)
49 {
50 	u32 num_elements_per_pg;
51 
52 	if (test_bit(BNX2I_NX2_DEV_5706, &hba->cnic_dev_type) ||
53 	    test_bit(BNX2I_NX2_DEV_5708, &hba->cnic_dev_type) ||
54 	    test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type)) {
55 		if (!is_power_of_2(hba->max_sqes))
56 			hba->max_sqes = rounddown_pow_of_two(hba->max_sqes);
57 
58 		if (!is_power_of_2(hba->max_rqes))
59 			hba->max_rqes = rounddown_pow_of_two(hba->max_rqes);
60 	}
61 
62 	/* Adjust each queue size if the user selection does not
63 	 * yield integral num of page buffers
64 	 */
65 	/* adjust SQ */
66 	num_elements_per_pg = CNIC_PAGE_SIZE / BNX2I_SQ_WQE_SIZE;
67 	if (hba->max_sqes < num_elements_per_pg)
68 		hba->max_sqes = num_elements_per_pg;
69 	else if (hba->max_sqes % num_elements_per_pg)
70 		hba->max_sqes = (hba->max_sqes + num_elements_per_pg - 1) &
71 				 ~(num_elements_per_pg - 1);
72 
73 	/* adjust CQ */
74 	num_elements_per_pg = CNIC_PAGE_SIZE / BNX2I_CQE_SIZE;
75 	if (hba->max_cqes < num_elements_per_pg)
76 		hba->max_cqes = num_elements_per_pg;
77 	else if (hba->max_cqes % num_elements_per_pg)
78 		hba->max_cqes = (hba->max_cqes + num_elements_per_pg - 1) &
79 				 ~(num_elements_per_pg - 1);
80 
81 	/* adjust RQ */
82 	num_elements_per_pg = CNIC_PAGE_SIZE / BNX2I_RQ_WQE_SIZE;
83 	if (hba->max_rqes < num_elements_per_pg)
84 		hba->max_rqes = num_elements_per_pg;
85 	else if (hba->max_rqes % num_elements_per_pg)
86 		hba->max_rqes = (hba->max_rqes + num_elements_per_pg - 1) &
87 				 ~(num_elements_per_pg - 1);
88 }
89 
90 
91 /**
92  * bnx2i_get_link_state - get network interface link state
93  * @hba:	adapter instance pointer
94  *
95  * updates adapter structure flag based on netdev state
96  */
bnx2i_get_link_state(struct bnx2i_hba * hba)97 static void bnx2i_get_link_state(struct bnx2i_hba *hba)
98 {
99 	if (test_bit(__LINK_STATE_NOCARRIER, &hba->netdev->state))
100 		set_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state);
101 	else
102 		clear_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state);
103 }
104 
105 
106 /**
107  * bnx2i_iscsi_license_error - displays iscsi license related error message
108  * @hba:		adapter instance pointer
109  * @error_code:		error classification
110  *
111  * Puts out an error log when driver is unable to offload iscsi connection
112  *	due to license restrictions
113  */
bnx2i_iscsi_license_error(struct bnx2i_hba * hba,u32 error_code)114 static void bnx2i_iscsi_license_error(struct bnx2i_hba *hba, u32 error_code)
115 {
116 	if (error_code == ISCSI_KCQE_COMPLETION_STATUS_ISCSI_NOT_SUPPORTED)
117 		/* iSCSI offload not supported on this device */
118 		printk(KERN_ERR "bnx2i: iSCSI not supported, dev=%s\n",
119 				hba->netdev->name);
120 	if (error_code == ISCSI_KCQE_COMPLETION_STATUS_LOM_ISCSI_NOT_ENABLED)
121 		/* iSCSI offload not supported on this LOM device */
122 		printk(KERN_ERR "bnx2i: LOM is not enable to "
123 				"offload iSCSI connections, dev=%s\n",
124 				hba->netdev->name);
125 	set_bit(ADAPTER_STATE_INIT_FAILED, &hba->adapter_state);
126 }
127 
128 
129 /**
130  * bnx2i_arm_cq_event_coalescing - arms CQ to enable EQ notification
131  * @ep:		endpoint (transport identifier) structure
132  * @action:	action, ARM or DISARM. For now only ARM_CQE is used
133  *
134  * Arm'ing CQ will enable chip to generate global EQ events inorder to interrupt
135  *	the driver. EQ event is generated CQ index is hit or at least 1 CQ is
136  *	outstanding and on chip timer expires
137  */
bnx2i_arm_cq_event_coalescing(struct bnx2i_endpoint * ep,u8 action)138 int bnx2i_arm_cq_event_coalescing(struct bnx2i_endpoint *ep, u8 action)
139 {
140 	struct bnx2i_5771x_cq_db *cq_db;
141 	u16 cq_index;
142 	u16 next_index = 0;
143 	u32 num_active_cmds;
144 
145 	/* Coalesce CQ entries only on 10G devices */
146 	if (!test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
147 		return 0;
148 
149 	/* Do not update CQ DB multiple times before firmware writes
150 	 * '0xFFFF' to CQDB->SQN field. Deviation may cause spurious
151 	 * interrupts and other unwanted results
152 	 */
153 	cq_db = (struct bnx2i_5771x_cq_db *) ep->qp.cq_pgtbl_virt;
154 
155 	if (action != CNIC_ARM_CQE_FP)
156 		if (cq_db->sqn[0] && cq_db->sqn[0] != 0xFFFF)
157 			return 0;
158 
159 	if (action == CNIC_ARM_CQE || action == CNIC_ARM_CQE_FP) {
160 		num_active_cmds = atomic_read(&ep->num_active_cmds);
161 		if (num_active_cmds <= event_coal_min)
162 			next_index = 1;
163 		else {
164 			next_index = num_active_cmds >> ep->ec_shift;
165 			if (next_index > num_active_cmds - event_coal_min)
166 				next_index = num_active_cmds - event_coal_min;
167 		}
168 		if (!next_index)
169 			next_index = 1;
170 		cq_index = ep->qp.cqe_exp_seq_sn + next_index - 1;
171 		if (cq_index > ep->qp.cqe_size * 2)
172 			cq_index -= ep->qp.cqe_size * 2;
173 		if (!cq_index)
174 			cq_index = 1;
175 
176 		cq_db->sqn[0] = cq_index;
177 	}
178 	return next_index;
179 }
180 
181 
182 /**
183  * bnx2i_get_rq_buf - copy RQ buffer contents to driver buffer
184  * @bnx2i_conn:		iscsi connection on which RQ event occurred
185  * @ptr:		driver buffer to which RQ buffer contents is to
186  *			be copied
187  * @len:		length of valid data inside RQ buf
188  *
189  * Copies RQ buffer contents from shared (DMA'able) memory region to
190  *	driver buffer. RQ is used to DMA unsolicitated iscsi pdu's and
191  *	scsi sense info
192  */
bnx2i_get_rq_buf(struct bnx2i_conn * bnx2i_conn,char * ptr,int len)193 void bnx2i_get_rq_buf(struct bnx2i_conn *bnx2i_conn, char *ptr, int len)
194 {
195 	if (!bnx2i_conn->ep->qp.rqe_left)
196 		return;
197 
198 	bnx2i_conn->ep->qp.rqe_left--;
199 	memcpy(ptr, (u8 *) bnx2i_conn->ep->qp.rq_cons_qe, len);
200 	if (bnx2i_conn->ep->qp.rq_cons_qe == bnx2i_conn->ep->qp.rq_last_qe) {
201 		bnx2i_conn->ep->qp.rq_cons_qe = bnx2i_conn->ep->qp.rq_first_qe;
202 		bnx2i_conn->ep->qp.rq_cons_idx = 0;
203 	} else {
204 		bnx2i_conn->ep->qp.rq_cons_qe++;
205 		bnx2i_conn->ep->qp.rq_cons_idx++;
206 	}
207 }
208 
209 
bnx2i_ring_577xx_doorbell(struct bnx2i_conn * conn)210 static void bnx2i_ring_577xx_doorbell(struct bnx2i_conn *conn)
211 {
212 	struct bnx2i_5771x_dbell dbell;
213 	u32 msg;
214 
215 	memset(&dbell, 0, sizeof(dbell));
216 	dbell.dbell.header = (B577XX_ISCSI_CONNECTION_TYPE <<
217 			      B577XX_DOORBELL_HDR_CONN_TYPE_SHIFT);
218 	msg = *((u32 *)&dbell);
219 	/* TODO : get doorbell register mapping */
220 	writel(cpu_to_le32(msg), conn->ep->qp.ctx_base);
221 }
222 
223 
224 /**
225  * bnx2i_put_rq_buf - Replenish RQ buffer, if required ring on chip doorbell
226  * @bnx2i_conn:	iscsi connection on which event to post
227  * @count:	number of RQ buffer being posted to chip
228  *
229  * No need to ring hardware doorbell for 57710 family of devices
230  */
bnx2i_put_rq_buf(struct bnx2i_conn * bnx2i_conn,int count)231 void bnx2i_put_rq_buf(struct bnx2i_conn *bnx2i_conn, int count)
232 {
233 	struct bnx2i_5771x_sq_rq_db *rq_db;
234 	u16 hi_bit = (bnx2i_conn->ep->qp.rq_prod_idx & 0x8000);
235 	struct bnx2i_endpoint *ep = bnx2i_conn->ep;
236 
237 	ep->qp.rqe_left += count;
238 	ep->qp.rq_prod_idx &= 0x7FFF;
239 	ep->qp.rq_prod_idx += count;
240 
241 	if (ep->qp.rq_prod_idx > bnx2i_conn->hba->max_rqes) {
242 		ep->qp.rq_prod_idx %= bnx2i_conn->hba->max_rqes;
243 		if (!hi_bit)
244 			ep->qp.rq_prod_idx |= 0x8000;
245 	} else
246 		ep->qp.rq_prod_idx |= hi_bit;
247 
248 	if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
249 		rq_db = (struct bnx2i_5771x_sq_rq_db *) ep->qp.rq_pgtbl_virt;
250 		rq_db->prod_idx = ep->qp.rq_prod_idx;
251 		/* no need to ring hardware doorbell for 57710 */
252 	} else {
253 		writew(ep->qp.rq_prod_idx,
254 		       ep->qp.ctx_base + CNIC_RECV_DOORBELL);
255 	}
256 }
257 
258 
259 /**
260  * bnx2i_ring_sq_dbell - Ring SQ doorbell to wake-up the processing engine
261  * @bnx2i_conn:		iscsi connection to which new SQ entries belong
262  * @count: 		number of SQ WQEs to post
263  *
264  * SQ DB is updated in host memory and TX Doorbell is rung for 57710 family
265  *	of devices. For 5706/5708/5709 new SQ WQE count is written into the
266  *	doorbell register
267  */
bnx2i_ring_sq_dbell(struct bnx2i_conn * bnx2i_conn,int count)268 static void bnx2i_ring_sq_dbell(struct bnx2i_conn *bnx2i_conn, int count)
269 {
270 	struct bnx2i_5771x_sq_rq_db *sq_db;
271 	struct bnx2i_endpoint *ep = bnx2i_conn->ep;
272 
273 	atomic_inc(&ep->num_active_cmds);
274 	wmb();	/* flush SQ WQE memory before the doorbell is rung */
275 	if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
276 		sq_db = (struct bnx2i_5771x_sq_rq_db *) ep->qp.sq_pgtbl_virt;
277 		sq_db->prod_idx = ep->qp.sq_prod_idx;
278 		bnx2i_ring_577xx_doorbell(bnx2i_conn);
279 	} else
280 		writew(count, ep->qp.ctx_base + CNIC_SEND_DOORBELL);
281 }
282 
283 
284 /**
285  * bnx2i_ring_dbell_update_sq_params - update SQ driver parameters
286  * @bnx2i_conn:	iscsi connection to which new SQ entries belong
287  * @count:	number of SQ WQEs to post
288  *
289  * this routine will update SQ driver parameters and ring the doorbell
290  */
bnx2i_ring_dbell_update_sq_params(struct bnx2i_conn * bnx2i_conn,int count)291 static void bnx2i_ring_dbell_update_sq_params(struct bnx2i_conn *bnx2i_conn,
292 					      int count)
293 {
294 	int tmp_cnt;
295 
296 	if (count == 1) {
297 		if (bnx2i_conn->ep->qp.sq_prod_qe ==
298 		    bnx2i_conn->ep->qp.sq_last_qe)
299 			bnx2i_conn->ep->qp.sq_prod_qe =
300 						bnx2i_conn->ep->qp.sq_first_qe;
301 		else
302 			bnx2i_conn->ep->qp.sq_prod_qe++;
303 	} else {
304 		if ((bnx2i_conn->ep->qp.sq_prod_qe + count) <=
305 		    bnx2i_conn->ep->qp.sq_last_qe)
306 			bnx2i_conn->ep->qp.sq_prod_qe += count;
307 		else {
308 			tmp_cnt = bnx2i_conn->ep->qp.sq_last_qe -
309 				bnx2i_conn->ep->qp.sq_prod_qe;
310 			bnx2i_conn->ep->qp.sq_prod_qe =
311 				&bnx2i_conn->ep->qp.sq_first_qe[count -
312 								(tmp_cnt + 1)];
313 		}
314 	}
315 	bnx2i_conn->ep->qp.sq_prod_idx += count;
316 	/* Ring the doorbell */
317 	bnx2i_ring_sq_dbell(bnx2i_conn, bnx2i_conn->ep->qp.sq_prod_idx);
318 }
319 
320 
321 /**
322  * bnx2i_send_iscsi_login - post iSCSI login request MP WQE to hardware
323  * @bnx2i_conn:	iscsi connection
324  * @task: transport layer's command structure pointer which is requesting
325  *	  a WQE to sent to chip for further processing
326  *
327  * prepare and post an iSCSI Login request WQE to CNIC firmware
328  */
bnx2i_send_iscsi_login(struct bnx2i_conn * bnx2i_conn,struct iscsi_task * task)329 int bnx2i_send_iscsi_login(struct bnx2i_conn *bnx2i_conn,
330 			   struct iscsi_task *task)
331 {
332 	struct bnx2i_login_request *login_wqe;
333 	struct iscsi_login_req *login_hdr;
334 	u32 dword;
335 
336 	login_hdr = (struct iscsi_login_req *)task->hdr;
337 	login_wqe = (struct bnx2i_login_request *)
338 						bnx2i_conn->ep->qp.sq_prod_qe;
339 
340 	login_wqe->op_code = login_hdr->opcode;
341 	login_wqe->op_attr = login_hdr->flags;
342 	login_wqe->version_max = login_hdr->max_version;
343 	login_wqe->version_min = login_hdr->min_version;
344 	login_wqe->data_length = ntoh24(login_hdr->dlength);
345 	login_wqe->isid_lo = *((u32 *) login_hdr->isid);
346 	login_wqe->isid_hi = *((u16 *) login_hdr->isid + 2);
347 	login_wqe->tsih = login_hdr->tsih;
348 	login_wqe->itt = task->itt |
349 		(ISCSI_TASK_TYPE_MPATH << ISCSI_LOGIN_REQUEST_TYPE_SHIFT);
350 	login_wqe->cid = login_hdr->cid;
351 
352 	login_wqe->cmd_sn = be32_to_cpu(login_hdr->cmdsn);
353 	login_wqe->exp_stat_sn = be32_to_cpu(login_hdr->exp_statsn);
354 	login_wqe->flags = ISCSI_LOGIN_REQUEST_UPDATE_EXP_STAT_SN;
355 
356 	login_wqe->resp_bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_bd_dma;
357 	login_wqe->resp_bd_list_addr_hi =
358 		(u32) ((u64) bnx2i_conn->gen_pdu.resp_bd_dma >> 32);
359 
360 	dword = ((1 << ISCSI_LOGIN_REQUEST_NUM_RESP_BDS_SHIFT) |
361 		 (bnx2i_conn->gen_pdu.resp_buf_size <<
362 		  ISCSI_LOGIN_REQUEST_RESP_BUFFER_LENGTH_SHIFT));
363 	login_wqe->resp_buffer = dword;
364 	login_wqe->bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.req_bd_dma;
365 	login_wqe->bd_list_addr_hi =
366 		(u32) ((u64) bnx2i_conn->gen_pdu.req_bd_dma >> 32);
367 	login_wqe->num_bds = 1;
368 	login_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
369 
370 	bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
371 	return 0;
372 }
373 
374 /**
375  * bnx2i_send_iscsi_tmf - post iSCSI task management request MP WQE to hardware
376  * @bnx2i_conn:	iscsi connection
377  * @mtask:	driver command structure which is requesting
378  *		a WQE to sent to chip for further processing
379  *
380  * prepare and post an iSCSI Login request WQE to CNIC firmware
381  */
bnx2i_send_iscsi_tmf(struct bnx2i_conn * bnx2i_conn,struct iscsi_task * mtask)382 int bnx2i_send_iscsi_tmf(struct bnx2i_conn *bnx2i_conn,
383 			 struct iscsi_task *mtask)
384 {
385 	struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
386 	struct iscsi_tm *tmfabort_hdr;
387 	struct scsi_cmnd *ref_sc;
388 	struct iscsi_task *ctask;
389 	struct bnx2i_tmf_request *tmfabort_wqe;
390 	u32 dword;
391 	u32 scsi_lun[2];
392 
393 	tmfabort_hdr = (struct iscsi_tm *)mtask->hdr;
394 	tmfabort_wqe = (struct bnx2i_tmf_request *)
395 						bnx2i_conn->ep->qp.sq_prod_qe;
396 
397 	tmfabort_wqe->op_code = tmfabort_hdr->opcode;
398 	tmfabort_wqe->op_attr = tmfabort_hdr->flags;
399 
400 	tmfabort_wqe->itt = (mtask->itt | (ISCSI_TASK_TYPE_MPATH << 14));
401 	tmfabort_wqe->reserved2 = 0;
402 	tmfabort_wqe->cmd_sn = be32_to_cpu(tmfabort_hdr->cmdsn);
403 
404 	switch (tmfabort_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) {
405 	case ISCSI_TM_FUNC_ABORT_TASK:
406 	case ISCSI_TM_FUNC_TASK_REASSIGN:
407 		ctask = iscsi_itt_to_task(conn, tmfabort_hdr->rtt);
408 		if (!ctask || !ctask->sc)
409 			/*
410 			 * the iscsi layer must have completed the cmd while
411 			 * was starting up.
412 			 *
413 			 * Note: In the case of a SCSI cmd timeout, the task's
414 			 *       sc is still active; hence ctask->sc != 0
415 			 *       In this case, the task must be aborted
416 			 */
417 			return 0;
418 
419 		ref_sc = ctask->sc;
420 		if (ref_sc->sc_data_direction == DMA_TO_DEVICE)
421 			dword = (ISCSI_TASK_TYPE_WRITE <<
422 				 ISCSI_CMD_REQUEST_TYPE_SHIFT);
423 		else
424 			dword = (ISCSI_TASK_TYPE_READ <<
425 				 ISCSI_CMD_REQUEST_TYPE_SHIFT);
426 		tmfabort_wqe->ref_itt = (dword |
427 					(tmfabort_hdr->rtt & ISCSI_ITT_MASK));
428 		break;
429 	default:
430 		tmfabort_wqe->ref_itt = RESERVED_ITT;
431 	}
432 	memcpy(scsi_lun, &tmfabort_hdr->lun, sizeof(struct scsi_lun));
433 	tmfabort_wqe->lun[0] = be32_to_cpu(scsi_lun[0]);
434 	tmfabort_wqe->lun[1] = be32_to_cpu(scsi_lun[1]);
435 
436 	tmfabort_wqe->ref_cmd_sn = be32_to_cpu(tmfabort_hdr->refcmdsn);
437 
438 	tmfabort_wqe->bd_list_addr_lo = (u32) bnx2i_conn->hba->mp_bd_dma;
439 	tmfabort_wqe->bd_list_addr_hi = (u32)
440 				((u64) bnx2i_conn->hba->mp_bd_dma >> 32);
441 	tmfabort_wqe->num_bds = 1;
442 	tmfabort_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
443 
444 	bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
445 	return 0;
446 }
447 
448 /**
449  * bnx2i_send_iscsi_text - post iSCSI text WQE to hardware
450  * @bnx2i_conn:	iscsi connection
451  * @mtask:	driver command structure which is requesting
452  *		a WQE to sent to chip for further processing
453  *
454  * prepare and post an iSCSI Text request WQE to CNIC firmware
455  */
bnx2i_send_iscsi_text(struct bnx2i_conn * bnx2i_conn,struct iscsi_task * mtask)456 int bnx2i_send_iscsi_text(struct bnx2i_conn *bnx2i_conn,
457 			  struct iscsi_task *mtask)
458 {
459 	struct bnx2i_text_request *text_wqe;
460 	struct iscsi_text *text_hdr;
461 	u32 dword;
462 
463 	text_hdr = (struct iscsi_text *)mtask->hdr;
464 	text_wqe = (struct bnx2i_text_request *) bnx2i_conn->ep->qp.sq_prod_qe;
465 
466 	memset(text_wqe, 0, sizeof(struct bnx2i_text_request));
467 
468 	text_wqe->op_code = text_hdr->opcode;
469 	text_wqe->op_attr = text_hdr->flags;
470 	text_wqe->data_length = ntoh24(text_hdr->dlength);
471 	text_wqe->itt = mtask->itt |
472 		(ISCSI_TASK_TYPE_MPATH << ISCSI_TEXT_REQUEST_TYPE_SHIFT);
473 	text_wqe->ttt = be32_to_cpu(text_hdr->ttt);
474 
475 	text_wqe->cmd_sn = be32_to_cpu(text_hdr->cmdsn);
476 
477 	text_wqe->resp_bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_bd_dma;
478 	text_wqe->resp_bd_list_addr_hi =
479 			(u32) ((u64) bnx2i_conn->gen_pdu.resp_bd_dma >> 32);
480 
481 	dword = ((1 << ISCSI_TEXT_REQUEST_NUM_RESP_BDS_SHIFT) |
482 		 (bnx2i_conn->gen_pdu.resp_buf_size <<
483 		  ISCSI_TEXT_REQUEST_RESP_BUFFER_LENGTH_SHIFT));
484 	text_wqe->resp_buffer = dword;
485 	text_wqe->bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.req_bd_dma;
486 	text_wqe->bd_list_addr_hi =
487 			(u32) ((u64) bnx2i_conn->gen_pdu.req_bd_dma >> 32);
488 	text_wqe->num_bds = 1;
489 	text_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
490 
491 	bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
492 	return 0;
493 }
494 
495 
496 /**
497  * bnx2i_send_iscsi_scsicmd - post iSCSI scsicmd request WQE to hardware
498  * @bnx2i_conn:	iscsi connection
499  * @cmd:	driver command structure which is requesting
500  *		a WQE to sent to chip for further processing
501  *
502  * prepare and post an iSCSI SCSI-CMD request WQE to CNIC firmware
503  */
bnx2i_send_iscsi_scsicmd(struct bnx2i_conn * bnx2i_conn,struct bnx2i_cmd * cmd)504 int bnx2i_send_iscsi_scsicmd(struct bnx2i_conn *bnx2i_conn,
505 			     struct bnx2i_cmd *cmd)
506 {
507 	struct bnx2i_cmd_request *scsi_cmd_wqe;
508 
509 	scsi_cmd_wqe = (struct bnx2i_cmd_request *)
510 						bnx2i_conn->ep->qp.sq_prod_qe;
511 	memcpy(scsi_cmd_wqe, &cmd->req, sizeof(struct bnx2i_cmd_request));
512 	scsi_cmd_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
513 
514 	bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
515 	return 0;
516 }
517 
518 /**
519  * bnx2i_send_iscsi_nopout - post iSCSI NOPOUT request WQE to hardware
520  * @bnx2i_conn:		iscsi connection
521  * @task:		transport layer's command structure pointer which is
522  *                      requesting a WQE to sent to chip for further processing
523  * @datap:		payload buffer pointer
524  * @data_len:		payload data length
525  * @unsol:		indicated whether nopout pdu is unsolicited pdu or
526  *			in response to target's NOPIN w/ TTT != FFFFFFFF
527  *
528  * prepare and post a nopout request WQE to CNIC firmware
529  */
bnx2i_send_iscsi_nopout(struct bnx2i_conn * bnx2i_conn,struct iscsi_task * task,char * datap,int data_len,int unsol)530 int bnx2i_send_iscsi_nopout(struct bnx2i_conn *bnx2i_conn,
531 			    struct iscsi_task *task,
532 			    char *datap, int data_len, int unsol)
533 {
534 	struct bnx2i_endpoint *ep = bnx2i_conn->ep;
535 	struct bnx2i_nop_out_request *nopout_wqe;
536 	struct iscsi_nopout *nopout_hdr;
537 
538 	nopout_hdr = (struct iscsi_nopout *)task->hdr;
539 	nopout_wqe = (struct bnx2i_nop_out_request *)ep->qp.sq_prod_qe;
540 
541 	memset(nopout_wqe, 0x00, sizeof(struct bnx2i_nop_out_request));
542 
543 	nopout_wqe->op_code = nopout_hdr->opcode;
544 	nopout_wqe->op_attr = ISCSI_FLAG_CMD_FINAL;
545 	memcpy(nopout_wqe->lun, &nopout_hdr->lun, 8);
546 
547 	/* 57710 requires LUN field to be swapped */
548 	if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
549 		swap(nopout_wqe->lun[0], nopout_wqe->lun[1]);
550 
551 	nopout_wqe->itt = ((u16)task->itt |
552 			   (ISCSI_TASK_TYPE_MPATH <<
553 			    ISCSI_TMF_REQUEST_TYPE_SHIFT));
554 	nopout_wqe->ttt = be32_to_cpu(nopout_hdr->ttt);
555 	nopout_wqe->flags = 0;
556 	if (!unsol)
557 		nopout_wqe->flags = ISCSI_NOP_OUT_REQUEST_LOCAL_COMPLETION;
558 	else if (nopout_hdr->itt == RESERVED_ITT)
559 		nopout_wqe->flags = ISCSI_NOP_OUT_REQUEST_LOCAL_COMPLETION;
560 
561 	nopout_wqe->cmd_sn = be32_to_cpu(nopout_hdr->cmdsn);
562 	nopout_wqe->data_length = data_len;
563 	if (data_len) {
564 		/* handle payload data, not required in first release */
565 		printk(KERN_ALERT "NOPOUT: WARNING!! payload len != 0\n");
566 	} else {
567 		nopout_wqe->bd_list_addr_lo = (u32)
568 					bnx2i_conn->hba->mp_bd_dma;
569 		nopout_wqe->bd_list_addr_hi =
570 			(u32) ((u64) bnx2i_conn->hba->mp_bd_dma >> 32);
571 		nopout_wqe->num_bds = 1;
572 	}
573 	nopout_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
574 
575 	bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
576 	return 0;
577 }
578 
579 
580 /**
581  * bnx2i_send_iscsi_logout - post iSCSI logout request WQE to hardware
582  * @bnx2i_conn:	iscsi connection
583  * @task:	transport layer's command structure pointer which is
584  *		requesting a WQE to sent to chip for further processing
585  *
586  * prepare and post logout request WQE to CNIC firmware
587  */
bnx2i_send_iscsi_logout(struct bnx2i_conn * bnx2i_conn,struct iscsi_task * task)588 int bnx2i_send_iscsi_logout(struct bnx2i_conn *bnx2i_conn,
589 			    struct iscsi_task *task)
590 {
591 	struct bnx2i_logout_request *logout_wqe;
592 	struct iscsi_logout *logout_hdr;
593 
594 	logout_hdr = (struct iscsi_logout *)task->hdr;
595 
596 	logout_wqe = (struct bnx2i_logout_request *)
597 						bnx2i_conn->ep->qp.sq_prod_qe;
598 	memset(logout_wqe, 0x00, sizeof(struct bnx2i_logout_request));
599 
600 	logout_wqe->op_code = logout_hdr->opcode;
601 	logout_wqe->cmd_sn = be32_to_cpu(logout_hdr->cmdsn);
602 	logout_wqe->op_attr =
603 			logout_hdr->flags | ISCSI_LOGOUT_REQUEST_ALWAYS_ONE;
604 	logout_wqe->itt = ((u16)task->itt |
605 			   (ISCSI_TASK_TYPE_MPATH <<
606 			    ISCSI_LOGOUT_REQUEST_TYPE_SHIFT));
607 	logout_wqe->data_length = 0;
608 	logout_wqe->cid = 0;
609 
610 	logout_wqe->bd_list_addr_lo = (u32) bnx2i_conn->hba->mp_bd_dma;
611 	logout_wqe->bd_list_addr_hi = (u32)
612 				((u64) bnx2i_conn->hba->mp_bd_dma >> 32);
613 	logout_wqe->num_bds = 1;
614 	logout_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
615 
616 	bnx2i_conn->ep->state = EP_STATE_LOGOUT_SENT;
617 
618 	bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
619 	return 0;
620 }
621 
622 
623 /**
624  * bnx2i_update_iscsi_conn - post iSCSI logout request WQE to hardware
625  * @conn:	iscsi connection which requires iscsi parameter update
626  *
627  * sends down iSCSI Conn Update request to move iSCSI conn to FFP
628  */
bnx2i_update_iscsi_conn(struct iscsi_conn * conn)629 void bnx2i_update_iscsi_conn(struct iscsi_conn *conn)
630 {
631 	struct bnx2i_conn *bnx2i_conn = conn->dd_data;
632 	struct bnx2i_hba *hba = bnx2i_conn->hba;
633 	struct kwqe *kwqe_arr[2];
634 	struct iscsi_kwqe_conn_update *update_wqe;
635 	struct iscsi_kwqe_conn_update conn_update_kwqe;
636 
637 	update_wqe = &conn_update_kwqe;
638 
639 	update_wqe->hdr.op_code = ISCSI_KWQE_OPCODE_UPDATE_CONN;
640 	update_wqe->hdr.flags =
641 		(ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
642 
643 	/* 5771x requires conn context id to be passed as is */
644 	if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_conn->ep->hba->cnic_dev_type))
645 		update_wqe->context_id = bnx2i_conn->ep->ep_cid;
646 	else
647 		update_wqe->context_id = (bnx2i_conn->ep->ep_cid >> 7);
648 	update_wqe->conn_flags = 0;
649 	if (conn->hdrdgst_en)
650 		update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_HEADER_DIGEST;
651 	if (conn->datadgst_en)
652 		update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_DATA_DIGEST;
653 	if (conn->session->initial_r2t_en)
654 		update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_INITIAL_R2T;
655 	if (conn->session->imm_data_en)
656 		update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_IMMEDIATE_DATA;
657 
658 	update_wqe->max_send_pdu_length = conn->max_xmit_dlength;
659 	update_wqe->max_recv_pdu_length = conn->max_recv_dlength;
660 	update_wqe->first_burst_length = conn->session->first_burst;
661 	update_wqe->max_burst_length = conn->session->max_burst;
662 	update_wqe->exp_stat_sn = conn->exp_statsn;
663 	update_wqe->max_outstanding_r2ts = conn->session->max_r2t;
664 	update_wqe->session_error_recovery_level = conn->session->erl;
665 	iscsi_conn_printk(KERN_ALERT, conn,
666 			  "bnx2i: conn update - MBL 0x%x FBL 0x%x"
667 			  "MRDSL_I 0x%x MRDSL_T 0x%x \n",
668 			  update_wqe->max_burst_length,
669 			  update_wqe->first_burst_length,
670 			  update_wqe->max_recv_pdu_length,
671 			  update_wqe->max_send_pdu_length);
672 
673 	kwqe_arr[0] = (struct kwqe *) update_wqe;
674 	if (hba->cnic && hba->cnic->submit_kwqes)
675 		hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 1);
676 }
677 
678 
679 /**
680  * bnx2i_ep_ofld_timer - post iSCSI logout request WQE to hardware
681  * @t:	timer context used to fetch the endpoint (transport
682  *	handle) structure pointer
683  *
684  * routine to handle connection offload/destroy request timeout
685  */
bnx2i_ep_ofld_timer(struct timer_list * t)686 void bnx2i_ep_ofld_timer(struct timer_list *t)
687 {
688 	struct bnx2i_endpoint *ep = from_timer(ep, t, ofld_timer);
689 
690 	if (ep->state == EP_STATE_OFLD_START) {
691 		printk(KERN_ALERT "ofld_timer: CONN_OFLD timeout\n");
692 		ep->state = EP_STATE_OFLD_FAILED;
693 	} else if (ep->state == EP_STATE_DISCONN_START) {
694 		printk(KERN_ALERT "ofld_timer: CONN_DISCON timeout\n");
695 		ep->state = EP_STATE_DISCONN_TIMEDOUT;
696 	} else if (ep->state == EP_STATE_CLEANUP_START) {
697 		printk(KERN_ALERT "ofld_timer: CONN_CLEANUP timeout\n");
698 		ep->state = EP_STATE_CLEANUP_FAILED;
699 	}
700 
701 	wake_up_interruptible(&ep->ofld_wait);
702 }
703 
704 
bnx2i_power_of2(u32 val)705 static int bnx2i_power_of2(u32 val)
706 {
707 	u32 power = 0;
708 	if (val & (val - 1))
709 		return power;
710 	val--;
711 	while (val) {
712 		val = val >> 1;
713 		power++;
714 	}
715 	return power;
716 }
717 
718 
719 /**
720  * bnx2i_send_cmd_cleanup_req - send iscsi cmd context clean-up request
721  * @hba:	adapter structure pointer
722  * @cmd:	driver command structure which is requesting
723  *		a WQE to sent to chip for further processing
724  *
725  * prepares and posts CONN_OFLD_REQ1/2 KWQE
726  */
bnx2i_send_cmd_cleanup_req(struct bnx2i_hba * hba,struct bnx2i_cmd * cmd)727 void bnx2i_send_cmd_cleanup_req(struct bnx2i_hba *hba, struct bnx2i_cmd *cmd)
728 {
729 	struct bnx2i_cleanup_request *cmd_cleanup;
730 
731 	cmd_cleanup =
732 		(struct bnx2i_cleanup_request *)cmd->conn->ep->qp.sq_prod_qe;
733 	memset(cmd_cleanup, 0x00, sizeof(struct bnx2i_cleanup_request));
734 
735 	cmd_cleanup->op_code = ISCSI_OPCODE_CLEANUP_REQUEST;
736 	cmd_cleanup->itt = cmd->req.itt;
737 	cmd_cleanup->cq_index = 0; /* CQ# used for completion, 5771x only */
738 
739 	bnx2i_ring_dbell_update_sq_params(cmd->conn, 1);
740 }
741 
742 
743 /**
744  * bnx2i_send_conn_destroy - initiates iscsi connection teardown process
745  * @hba:	adapter structure pointer
746  * @ep:		endpoint (transport identifier) structure
747  *
748  * this routine prepares and posts CONN_OFLD_REQ1/2 KWQE to initiate
749  * 	iscsi connection context clean-up process
750  */
bnx2i_send_conn_destroy(struct bnx2i_hba * hba,struct bnx2i_endpoint * ep)751 int bnx2i_send_conn_destroy(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
752 {
753 	struct kwqe *kwqe_arr[2];
754 	struct iscsi_kwqe_conn_destroy conn_cleanup;
755 	int rc = -EINVAL;
756 
757 	memset(&conn_cleanup, 0x00, sizeof(struct iscsi_kwqe_conn_destroy));
758 
759 	conn_cleanup.hdr.op_code = ISCSI_KWQE_OPCODE_DESTROY_CONN;
760 	conn_cleanup.hdr.flags =
761 		(ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
762 	/* 5771x requires conn context id to be passed as is */
763 	if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
764 		conn_cleanup.context_id = ep->ep_cid;
765 	else
766 		conn_cleanup.context_id = (ep->ep_cid >> 7);
767 
768 	conn_cleanup.reserved0 = (u16)ep->ep_iscsi_cid;
769 
770 	kwqe_arr[0] = (struct kwqe *) &conn_cleanup;
771 	if (hba->cnic && hba->cnic->submit_kwqes)
772 		rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 1);
773 
774 	return rc;
775 }
776 
777 
778 /**
779  * bnx2i_570x_send_conn_ofld_req - initiates iscsi conn context setup process
780  * @hba: 		adapter structure pointer
781  * @ep: 		endpoint (transport identifier) structure
782  *
783  * 5706/5708/5709 specific - prepares and posts CONN_OFLD_REQ1/2 KWQE
784  */
bnx2i_570x_send_conn_ofld_req(struct bnx2i_hba * hba,struct bnx2i_endpoint * ep)785 static int bnx2i_570x_send_conn_ofld_req(struct bnx2i_hba *hba,
786 					 struct bnx2i_endpoint *ep)
787 {
788 	struct kwqe *kwqe_arr[2];
789 	struct iscsi_kwqe_conn_offload1 ofld_req1;
790 	struct iscsi_kwqe_conn_offload2 ofld_req2;
791 	dma_addr_t dma_addr;
792 	int num_kwqes = 2;
793 	u32 *ptbl;
794 	int rc = -EINVAL;
795 
796 	ofld_req1.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN1;
797 	ofld_req1.hdr.flags =
798 		(ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
799 
800 	ofld_req1.iscsi_conn_id = (u16) ep->ep_iscsi_cid;
801 
802 	dma_addr = ep->qp.sq_pgtbl_phys;
803 	ofld_req1.sq_page_table_addr_lo = (u32) dma_addr;
804 	ofld_req1.sq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
805 
806 	dma_addr = ep->qp.cq_pgtbl_phys;
807 	ofld_req1.cq_page_table_addr_lo = (u32) dma_addr;
808 	ofld_req1.cq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
809 
810 	ofld_req2.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN2;
811 	ofld_req2.hdr.flags =
812 		(ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
813 
814 	dma_addr = ep->qp.rq_pgtbl_phys;
815 	ofld_req2.rq_page_table_addr_lo = (u32) dma_addr;
816 	ofld_req2.rq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
817 
818 	ptbl = (u32 *) ep->qp.sq_pgtbl_virt;
819 
820 	ofld_req2.sq_first_pte.hi = *ptbl++;
821 	ofld_req2.sq_first_pte.lo = *ptbl;
822 
823 	ptbl = (u32 *) ep->qp.cq_pgtbl_virt;
824 	ofld_req2.cq_first_pte.hi = *ptbl++;
825 	ofld_req2.cq_first_pte.lo = *ptbl;
826 
827 	kwqe_arr[0] = (struct kwqe *) &ofld_req1;
828 	kwqe_arr[1] = (struct kwqe *) &ofld_req2;
829 	ofld_req2.num_additional_wqes = 0;
830 
831 	if (hba->cnic && hba->cnic->submit_kwqes)
832 		rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, num_kwqes);
833 
834 	return rc;
835 }
836 
837 
838 /**
839  * bnx2i_5771x_send_conn_ofld_req - initiates iscsi connection context creation
840  * @hba: 		adapter structure pointer
841  * @ep: 		endpoint (transport identifier) structure
842  *
843  * 57710 specific - prepares and posts CONN_OFLD_REQ1/2 KWQE
844  */
bnx2i_5771x_send_conn_ofld_req(struct bnx2i_hba * hba,struct bnx2i_endpoint * ep)845 static int bnx2i_5771x_send_conn_ofld_req(struct bnx2i_hba *hba,
846 					  struct bnx2i_endpoint *ep)
847 {
848 	struct kwqe *kwqe_arr[5];
849 	struct iscsi_kwqe_conn_offload1 ofld_req1;
850 	struct iscsi_kwqe_conn_offload2 ofld_req2;
851 	struct iscsi_kwqe_conn_offload3 ofld_req3[1];
852 	dma_addr_t dma_addr;
853 	int num_kwqes = 2;
854 	u32 *ptbl;
855 	int rc = -EINVAL;
856 
857 	ofld_req1.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN1;
858 	ofld_req1.hdr.flags =
859 		(ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
860 
861 	ofld_req1.iscsi_conn_id = (u16) ep->ep_iscsi_cid;
862 
863 	dma_addr = ep->qp.sq_pgtbl_phys + ISCSI_SQ_DB_SIZE;
864 	ofld_req1.sq_page_table_addr_lo = (u32) dma_addr;
865 	ofld_req1.sq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
866 
867 	dma_addr = ep->qp.cq_pgtbl_phys + ISCSI_CQ_DB_SIZE;
868 	ofld_req1.cq_page_table_addr_lo = (u32) dma_addr;
869 	ofld_req1.cq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
870 
871 	ofld_req2.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN2;
872 	ofld_req2.hdr.flags =
873 		(ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
874 
875 	dma_addr = ep->qp.rq_pgtbl_phys + ISCSI_RQ_DB_SIZE;
876 	ofld_req2.rq_page_table_addr_lo = (u32) dma_addr;
877 	ofld_req2.rq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
878 
879 	ptbl = (u32 *)((u8 *)ep->qp.sq_pgtbl_virt + ISCSI_SQ_DB_SIZE);
880 	ofld_req2.sq_first_pte.hi = *ptbl++;
881 	ofld_req2.sq_first_pte.lo = *ptbl;
882 
883 	ptbl = (u32 *)((u8 *)ep->qp.cq_pgtbl_virt + ISCSI_CQ_DB_SIZE);
884 	ofld_req2.cq_first_pte.hi = *ptbl++;
885 	ofld_req2.cq_first_pte.lo = *ptbl;
886 
887 	kwqe_arr[0] = (struct kwqe *) &ofld_req1;
888 	kwqe_arr[1] = (struct kwqe *) &ofld_req2;
889 
890 	ofld_req2.num_additional_wqes = 1;
891 	memset(ofld_req3, 0x00, sizeof(ofld_req3[0]));
892 	ptbl = (u32 *)((u8 *)ep->qp.rq_pgtbl_virt + ISCSI_RQ_DB_SIZE);
893 	ofld_req3[0].qp_first_pte[0].hi = *ptbl++;
894 	ofld_req3[0].qp_first_pte[0].lo = *ptbl;
895 
896 	kwqe_arr[2] = (struct kwqe *) ofld_req3;
897 	/* need if we decide to go with multiple KCQE's per conn */
898 	num_kwqes += 1;
899 
900 	if (hba->cnic && hba->cnic->submit_kwqes)
901 		rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, num_kwqes);
902 
903 	return rc;
904 }
905 
906 /**
907  * bnx2i_send_conn_ofld_req - initiates iscsi connection context setup process
908  *
909  * @hba: 		adapter structure pointer
910  * @ep: 		endpoint (transport identifier) structure
911  *
912  * this routine prepares and posts CONN_OFLD_REQ1/2 KWQE
913  */
bnx2i_send_conn_ofld_req(struct bnx2i_hba * hba,struct bnx2i_endpoint * ep)914 int bnx2i_send_conn_ofld_req(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
915 {
916 	int rc;
917 
918 	if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type))
919 		rc = bnx2i_5771x_send_conn_ofld_req(hba, ep);
920 	else
921 		rc = bnx2i_570x_send_conn_ofld_req(hba, ep);
922 
923 	return rc;
924 }
925 
926 
927 /**
928  * setup_qp_page_tables - iscsi QP page table setup function
929  * @ep:		endpoint (transport identifier) structure
930  *
931  * Sets up page tables for SQ/RQ/CQ, 1G/sec (5706/5708/5709) devices requires
932  * 	64-bit address in big endian format. Whereas 10G/sec (57710) requires
933  * 	PT in little endian format
934  */
setup_qp_page_tables(struct bnx2i_endpoint * ep)935 static void setup_qp_page_tables(struct bnx2i_endpoint *ep)
936 {
937 	int num_pages;
938 	u32 *ptbl;
939 	dma_addr_t page;
940 	int cnic_dev_10g;
941 
942 	if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
943 		cnic_dev_10g = 1;
944 	else
945 		cnic_dev_10g = 0;
946 
947 	/* SQ page table */
948 	memset(ep->qp.sq_pgtbl_virt, 0, ep->qp.sq_pgtbl_size);
949 	num_pages = ep->qp.sq_mem_size / CNIC_PAGE_SIZE;
950 	page = ep->qp.sq_phys;
951 
952 	if (cnic_dev_10g)
953 		ptbl = (u32 *)((u8 *)ep->qp.sq_pgtbl_virt + ISCSI_SQ_DB_SIZE);
954 	else
955 		ptbl = (u32 *) ep->qp.sq_pgtbl_virt;
956 	while (num_pages--) {
957 		if (cnic_dev_10g) {
958 			/* PTE is written in little endian format for 57710 */
959 			*ptbl = (u32) page;
960 			ptbl++;
961 			*ptbl = (u32) ((u64) page >> 32);
962 			ptbl++;
963 			page += CNIC_PAGE_SIZE;
964 		} else {
965 			/* PTE is written in big endian format for
966 			 * 5706/5708/5709 devices */
967 			*ptbl = (u32) ((u64) page >> 32);
968 			ptbl++;
969 			*ptbl = (u32) page;
970 			ptbl++;
971 			page += CNIC_PAGE_SIZE;
972 		}
973 	}
974 
975 	/* RQ page table */
976 	memset(ep->qp.rq_pgtbl_virt, 0, ep->qp.rq_pgtbl_size);
977 	num_pages = ep->qp.rq_mem_size / CNIC_PAGE_SIZE;
978 	page = ep->qp.rq_phys;
979 
980 	if (cnic_dev_10g)
981 		ptbl = (u32 *)((u8 *)ep->qp.rq_pgtbl_virt + ISCSI_RQ_DB_SIZE);
982 	else
983 		ptbl = (u32 *) ep->qp.rq_pgtbl_virt;
984 	while (num_pages--) {
985 		if (cnic_dev_10g) {
986 			/* PTE is written in little endian format for 57710 */
987 			*ptbl = (u32) page;
988 			ptbl++;
989 			*ptbl = (u32) ((u64) page >> 32);
990 			ptbl++;
991 			page += CNIC_PAGE_SIZE;
992 		} else {
993 			/* PTE is written in big endian format for
994 			 * 5706/5708/5709 devices */
995 			*ptbl = (u32) ((u64) page >> 32);
996 			ptbl++;
997 			*ptbl = (u32) page;
998 			ptbl++;
999 			page += CNIC_PAGE_SIZE;
1000 		}
1001 	}
1002 
1003 	/* CQ page table */
1004 	memset(ep->qp.cq_pgtbl_virt, 0, ep->qp.cq_pgtbl_size);
1005 	num_pages = ep->qp.cq_mem_size / CNIC_PAGE_SIZE;
1006 	page = ep->qp.cq_phys;
1007 
1008 	if (cnic_dev_10g)
1009 		ptbl = (u32 *)((u8 *)ep->qp.cq_pgtbl_virt + ISCSI_CQ_DB_SIZE);
1010 	else
1011 		ptbl = (u32 *) ep->qp.cq_pgtbl_virt;
1012 	while (num_pages--) {
1013 		if (cnic_dev_10g) {
1014 			/* PTE is written in little endian format for 57710 */
1015 			*ptbl = (u32) page;
1016 			ptbl++;
1017 			*ptbl = (u32) ((u64) page >> 32);
1018 			ptbl++;
1019 			page += CNIC_PAGE_SIZE;
1020 		} else {
1021 			/* PTE is written in big endian format for
1022 			 * 5706/5708/5709 devices */
1023 			*ptbl = (u32) ((u64) page >> 32);
1024 			ptbl++;
1025 			*ptbl = (u32) page;
1026 			ptbl++;
1027 			page += CNIC_PAGE_SIZE;
1028 		}
1029 	}
1030 }
1031 
1032 
1033 /**
1034  * bnx2i_alloc_qp_resc - allocates required resources for QP.
1035  * @hba:	adapter structure pointer
1036  * @ep:		endpoint (transport identifier) structure
1037  *
1038  * Allocate QP (transport layer for iSCSI connection) resources, DMA'able
1039  *	memory for SQ/RQ/CQ and page tables. EP structure elements such
1040  *	as producer/consumer indexes/pointers, queue sizes and page table
1041  *	contents are setup
1042  */
bnx2i_alloc_qp_resc(struct bnx2i_hba * hba,struct bnx2i_endpoint * ep)1043 int bnx2i_alloc_qp_resc(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
1044 {
1045 	struct bnx2i_5771x_cq_db *cq_db;
1046 
1047 	ep->hba = hba;
1048 	ep->conn = NULL;
1049 	ep->ep_cid = ep->ep_iscsi_cid = ep->ep_pg_cid = 0;
1050 
1051 	/* Allocate page table memory for SQ which is page aligned */
1052 	ep->qp.sq_mem_size = hba->max_sqes * BNX2I_SQ_WQE_SIZE;
1053 	ep->qp.sq_mem_size =
1054 		(ep->qp.sq_mem_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK;
1055 	ep->qp.sq_pgtbl_size =
1056 		(ep->qp.sq_mem_size / CNIC_PAGE_SIZE) * sizeof(void *);
1057 	ep->qp.sq_pgtbl_size =
1058 		(ep->qp.sq_pgtbl_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK;
1059 
1060 	ep->qp.sq_pgtbl_virt =
1061 		dma_alloc_coherent(&hba->pcidev->dev, ep->qp.sq_pgtbl_size,
1062 				   &ep->qp.sq_pgtbl_phys, GFP_KERNEL);
1063 	if (!ep->qp.sq_pgtbl_virt) {
1064 		printk(KERN_ALERT "bnx2i: unable to alloc SQ PT mem (%d)\n",
1065 				  ep->qp.sq_pgtbl_size);
1066 		goto mem_alloc_err;
1067 	}
1068 
1069 	/* Allocate memory area for actual SQ element */
1070 	ep->qp.sq_virt =
1071 		dma_alloc_coherent(&hba->pcidev->dev, ep->qp.sq_mem_size,
1072 				   &ep->qp.sq_phys, GFP_KERNEL);
1073 	if (!ep->qp.sq_virt) {
1074 		printk(KERN_ALERT "bnx2i: unable to alloc SQ BD memory %d\n",
1075 				  ep->qp.sq_mem_size);
1076 		goto mem_alloc_err;
1077 	}
1078 
1079 	ep->qp.sq_first_qe = ep->qp.sq_virt;
1080 	ep->qp.sq_prod_qe = ep->qp.sq_first_qe;
1081 	ep->qp.sq_cons_qe = ep->qp.sq_first_qe;
1082 	ep->qp.sq_last_qe = &ep->qp.sq_first_qe[hba->max_sqes - 1];
1083 	ep->qp.sq_prod_idx = 0;
1084 	ep->qp.sq_cons_idx = 0;
1085 	ep->qp.sqe_left = hba->max_sqes;
1086 
1087 	/* Allocate page table memory for CQ which is page aligned */
1088 	ep->qp.cq_mem_size = hba->max_cqes * BNX2I_CQE_SIZE;
1089 	ep->qp.cq_mem_size =
1090 		(ep->qp.cq_mem_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK;
1091 	ep->qp.cq_pgtbl_size =
1092 		(ep->qp.cq_mem_size / CNIC_PAGE_SIZE) * sizeof(void *);
1093 	ep->qp.cq_pgtbl_size =
1094 		(ep->qp.cq_pgtbl_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK;
1095 
1096 	ep->qp.cq_pgtbl_virt =
1097 		dma_alloc_coherent(&hba->pcidev->dev, ep->qp.cq_pgtbl_size,
1098 				   &ep->qp.cq_pgtbl_phys, GFP_KERNEL);
1099 	if (!ep->qp.cq_pgtbl_virt) {
1100 		printk(KERN_ALERT "bnx2i: unable to alloc CQ PT memory %d\n",
1101 				  ep->qp.cq_pgtbl_size);
1102 		goto mem_alloc_err;
1103 	}
1104 
1105 	/* Allocate memory area for actual CQ element */
1106 	ep->qp.cq_virt =
1107 		dma_alloc_coherent(&hba->pcidev->dev, ep->qp.cq_mem_size,
1108 				   &ep->qp.cq_phys, GFP_KERNEL);
1109 	if (!ep->qp.cq_virt) {
1110 		printk(KERN_ALERT "bnx2i: unable to alloc CQ BD memory %d\n",
1111 				  ep->qp.cq_mem_size);
1112 		goto mem_alloc_err;
1113 	}
1114 
1115 	ep->qp.cq_first_qe = ep->qp.cq_virt;
1116 	ep->qp.cq_prod_qe = ep->qp.cq_first_qe;
1117 	ep->qp.cq_cons_qe = ep->qp.cq_first_qe;
1118 	ep->qp.cq_last_qe = &ep->qp.cq_first_qe[hba->max_cqes - 1];
1119 	ep->qp.cq_prod_idx = 0;
1120 	ep->qp.cq_cons_idx = 0;
1121 	ep->qp.cqe_left = hba->max_cqes;
1122 	ep->qp.cqe_exp_seq_sn = ISCSI_INITIAL_SN;
1123 	ep->qp.cqe_size = hba->max_cqes;
1124 
1125 	/* Invalidate all EQ CQE index, req only for 57710 */
1126 	cq_db = (struct bnx2i_5771x_cq_db *) ep->qp.cq_pgtbl_virt;
1127 	memset(cq_db->sqn, 0xFF, sizeof(cq_db->sqn[0]) * BNX2X_MAX_CQS);
1128 
1129 	/* Allocate page table memory for RQ which is page aligned */
1130 	ep->qp.rq_mem_size = hba->max_rqes * BNX2I_RQ_WQE_SIZE;
1131 	ep->qp.rq_mem_size =
1132 		(ep->qp.rq_mem_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK;
1133 	ep->qp.rq_pgtbl_size =
1134 		(ep->qp.rq_mem_size / CNIC_PAGE_SIZE) * sizeof(void *);
1135 	ep->qp.rq_pgtbl_size =
1136 		(ep->qp.rq_pgtbl_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK;
1137 
1138 	ep->qp.rq_pgtbl_virt =
1139 		dma_alloc_coherent(&hba->pcidev->dev, ep->qp.rq_pgtbl_size,
1140 				   &ep->qp.rq_pgtbl_phys, GFP_KERNEL);
1141 	if (!ep->qp.rq_pgtbl_virt) {
1142 		printk(KERN_ALERT "bnx2i: unable to alloc RQ PT mem %d\n",
1143 				  ep->qp.rq_pgtbl_size);
1144 		goto mem_alloc_err;
1145 	}
1146 
1147 	/* Allocate memory area for actual RQ element */
1148 	ep->qp.rq_virt =
1149 		dma_alloc_coherent(&hba->pcidev->dev, ep->qp.rq_mem_size,
1150 				   &ep->qp.rq_phys, GFP_KERNEL);
1151 	if (!ep->qp.rq_virt) {
1152 		printk(KERN_ALERT "bnx2i: unable to alloc RQ BD memory %d\n",
1153 				  ep->qp.rq_mem_size);
1154 		goto mem_alloc_err;
1155 	}
1156 
1157 	ep->qp.rq_first_qe = ep->qp.rq_virt;
1158 	ep->qp.rq_prod_qe = ep->qp.rq_first_qe;
1159 	ep->qp.rq_cons_qe = ep->qp.rq_first_qe;
1160 	ep->qp.rq_last_qe = &ep->qp.rq_first_qe[hba->max_rqes - 1];
1161 	ep->qp.rq_prod_idx = 0x8000;
1162 	ep->qp.rq_cons_idx = 0;
1163 	ep->qp.rqe_left = hba->max_rqes;
1164 
1165 	setup_qp_page_tables(ep);
1166 
1167 	return 0;
1168 
1169 mem_alloc_err:
1170 	bnx2i_free_qp_resc(hba, ep);
1171 	return -ENOMEM;
1172 }
1173 
1174 
1175 
1176 /**
1177  * bnx2i_free_qp_resc - free memory resources held by QP
1178  * @hba:	adapter structure pointer
1179  * @ep:	endpoint (transport identifier) structure
1180  *
1181  * Free QP resources - SQ/RQ/CQ memory and page tables.
1182  */
bnx2i_free_qp_resc(struct bnx2i_hba * hba,struct bnx2i_endpoint * ep)1183 void bnx2i_free_qp_resc(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
1184 {
1185 	if (ep->qp.ctx_base) {
1186 		iounmap(ep->qp.ctx_base);
1187 		ep->qp.ctx_base = NULL;
1188 	}
1189 	/* Free SQ mem */
1190 	if (ep->qp.sq_pgtbl_virt) {
1191 		dma_free_coherent(&hba->pcidev->dev, ep->qp.sq_pgtbl_size,
1192 				  ep->qp.sq_pgtbl_virt, ep->qp.sq_pgtbl_phys);
1193 		ep->qp.sq_pgtbl_virt = NULL;
1194 		ep->qp.sq_pgtbl_phys = 0;
1195 	}
1196 	if (ep->qp.sq_virt) {
1197 		dma_free_coherent(&hba->pcidev->dev, ep->qp.sq_mem_size,
1198 				  ep->qp.sq_virt, ep->qp.sq_phys);
1199 		ep->qp.sq_virt = NULL;
1200 		ep->qp.sq_phys = 0;
1201 	}
1202 
1203 	/* Free RQ mem */
1204 	if (ep->qp.rq_pgtbl_virt) {
1205 		dma_free_coherent(&hba->pcidev->dev, ep->qp.rq_pgtbl_size,
1206 				  ep->qp.rq_pgtbl_virt, ep->qp.rq_pgtbl_phys);
1207 		ep->qp.rq_pgtbl_virt = NULL;
1208 		ep->qp.rq_pgtbl_phys = 0;
1209 	}
1210 	if (ep->qp.rq_virt) {
1211 		dma_free_coherent(&hba->pcidev->dev, ep->qp.rq_mem_size,
1212 				  ep->qp.rq_virt, ep->qp.rq_phys);
1213 		ep->qp.rq_virt = NULL;
1214 		ep->qp.rq_phys = 0;
1215 	}
1216 
1217 	/* Free CQ mem */
1218 	if (ep->qp.cq_pgtbl_virt) {
1219 		dma_free_coherent(&hba->pcidev->dev, ep->qp.cq_pgtbl_size,
1220 				  ep->qp.cq_pgtbl_virt, ep->qp.cq_pgtbl_phys);
1221 		ep->qp.cq_pgtbl_virt = NULL;
1222 		ep->qp.cq_pgtbl_phys = 0;
1223 	}
1224 	if (ep->qp.cq_virt) {
1225 		dma_free_coherent(&hba->pcidev->dev, ep->qp.cq_mem_size,
1226 				  ep->qp.cq_virt, ep->qp.cq_phys);
1227 		ep->qp.cq_virt = NULL;
1228 		ep->qp.cq_phys = 0;
1229 	}
1230 }
1231 
1232 
1233 /**
1234  * bnx2i_send_fw_iscsi_init_msg - initiates initial handshake with iscsi f/w
1235  * @hba:	adapter structure pointer
1236  *
1237  * Send down iscsi_init KWQEs which initiates the initial handshake with the f/w
1238  * 	This results in iSCSi support validation and on-chip context manager
1239  * 	initialization.  Firmware completes this handshake with a CQE carrying
1240  * 	the result of iscsi support validation. Parameter carried by
1241  * 	iscsi init request determines the number of offloaded connection and
1242  * 	tolerance level for iscsi protocol violation this hba/chip can support
1243  */
bnx2i_send_fw_iscsi_init_msg(struct bnx2i_hba * hba)1244 int bnx2i_send_fw_iscsi_init_msg(struct bnx2i_hba *hba)
1245 {
1246 	struct kwqe *kwqe_arr[3];
1247 	struct iscsi_kwqe_init1 iscsi_init;
1248 	struct iscsi_kwqe_init2 iscsi_init2;
1249 	int rc = 0;
1250 	u64 mask64;
1251 
1252 	memset(&iscsi_init, 0x00, sizeof(struct iscsi_kwqe_init1));
1253 	memset(&iscsi_init2, 0x00, sizeof(struct iscsi_kwqe_init2));
1254 
1255 	bnx2i_adjust_qp_size(hba);
1256 
1257 	iscsi_init.flags =
1258 		(CNIC_PAGE_BITS - 8) << ISCSI_KWQE_INIT1_PAGE_SIZE_SHIFT;
1259 	if (en_tcp_dack)
1260 		iscsi_init.flags |= ISCSI_KWQE_INIT1_DELAYED_ACK_ENABLE;
1261 	iscsi_init.reserved0 = 0;
1262 	iscsi_init.num_cqs = 1;
1263 	iscsi_init.hdr.op_code = ISCSI_KWQE_OPCODE_INIT1;
1264 	iscsi_init.hdr.flags =
1265 		(ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
1266 
1267 	iscsi_init.dummy_buffer_addr_lo = (u32) hba->dummy_buf_dma;
1268 	iscsi_init.dummy_buffer_addr_hi =
1269 		(u32) ((u64) hba->dummy_buf_dma >> 32);
1270 
1271 	hba->num_ccell = hba->max_sqes >> 1;
1272 	hba->ctx_ccell_tasks =
1273 			((hba->num_ccell & 0xFFFF) | (hba->max_sqes << 16));
1274 	iscsi_init.num_ccells_per_conn = hba->num_ccell;
1275 	iscsi_init.num_tasks_per_conn = hba->max_sqes;
1276 	iscsi_init.sq_wqes_per_page = CNIC_PAGE_SIZE / BNX2I_SQ_WQE_SIZE;
1277 	iscsi_init.sq_num_wqes = hba->max_sqes;
1278 	iscsi_init.cq_log_wqes_per_page =
1279 		(u8) bnx2i_power_of2(CNIC_PAGE_SIZE / BNX2I_CQE_SIZE);
1280 	iscsi_init.cq_num_wqes = hba->max_cqes;
1281 	iscsi_init.cq_num_pages = (hba->max_cqes * BNX2I_CQE_SIZE +
1282 				   (CNIC_PAGE_SIZE - 1)) / CNIC_PAGE_SIZE;
1283 	iscsi_init.sq_num_pages = (hba->max_sqes * BNX2I_SQ_WQE_SIZE +
1284 				   (CNIC_PAGE_SIZE - 1)) / CNIC_PAGE_SIZE;
1285 	iscsi_init.rq_buffer_size = BNX2I_RQ_WQE_SIZE;
1286 	iscsi_init.rq_num_wqes = hba->max_rqes;
1287 
1288 
1289 	iscsi_init2.hdr.op_code = ISCSI_KWQE_OPCODE_INIT2;
1290 	iscsi_init2.hdr.flags =
1291 		(ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
1292 	iscsi_init2.max_cq_sqn = hba->max_cqes * 2 + 1;
1293 	mask64 = 0x0ULL;
1294 	mask64 |= (
1295 		/* CISCO MDS */
1296 		(1UL <<
1297 		  ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_NOT_RSRV) |
1298 		/* HP MSA1510i */
1299 		(1UL <<
1300 		  ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_EXP_DATASN) |
1301 		/* EMC */
1302 		(1ULL << ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_LUN));
1303 	if (error_mask1) {
1304 		iscsi_init2.error_bit_map[0] = error_mask1;
1305 		mask64 ^= (u32)(mask64);
1306 		mask64 |= error_mask1;
1307 	} else
1308 		iscsi_init2.error_bit_map[0] = (u32) mask64;
1309 
1310 	if (error_mask2) {
1311 		iscsi_init2.error_bit_map[1] = error_mask2;
1312 		mask64 &= 0xffffffff;
1313 		mask64 |= ((u64)error_mask2 << 32);
1314 	} else
1315 		iscsi_init2.error_bit_map[1] = (u32) (mask64 >> 32);
1316 
1317 	iscsi_error_mask = mask64;
1318 
1319 	kwqe_arr[0] = (struct kwqe *) &iscsi_init;
1320 	kwqe_arr[1] = (struct kwqe *) &iscsi_init2;
1321 
1322 	if (hba->cnic && hba->cnic->submit_kwqes)
1323 		rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 2);
1324 	return rc;
1325 }
1326 
1327 
1328 /**
1329  * bnx2i_process_scsi_cmd_resp - this function handles scsi cmd completion.
1330  * @session:	iscsi session
1331  * @bnx2i_conn:	bnx2i connection
1332  * @cqe:	pointer to newly DMA'ed CQE entry for processing
1333  *
1334  * process SCSI CMD Response CQE & complete the request to SCSI-ML
1335  */
bnx2i_process_scsi_cmd_resp(struct iscsi_session * session,struct bnx2i_conn * bnx2i_conn,struct cqe * cqe)1336 int bnx2i_process_scsi_cmd_resp(struct iscsi_session *session,
1337 				struct bnx2i_conn *bnx2i_conn,
1338 				struct cqe *cqe)
1339 {
1340 	struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1341 	struct bnx2i_hba *hba = bnx2i_conn->hba;
1342 	struct bnx2i_cmd_response *resp_cqe;
1343 	struct bnx2i_cmd *bnx2i_cmd;
1344 	struct iscsi_task *task;
1345 	struct iscsi_scsi_rsp *hdr;
1346 	u32 datalen = 0;
1347 
1348 	resp_cqe = (struct bnx2i_cmd_response *)cqe;
1349 	spin_lock_bh(&session->back_lock);
1350 	task = iscsi_itt_to_task(conn,
1351 				 resp_cqe->itt & ISCSI_CMD_RESPONSE_INDEX);
1352 	if (!task)
1353 		goto fail;
1354 
1355 	bnx2i_cmd = task->dd_data;
1356 
1357 	if (bnx2i_cmd->req.op_attr & ISCSI_CMD_REQUEST_READ) {
1358 		conn->datain_pdus_cnt +=
1359 			resp_cqe->task_stat.read_stat.num_data_ins;
1360 		conn->rxdata_octets +=
1361 			bnx2i_cmd->req.total_data_transfer_length;
1362 		ADD_STATS_64(hba, rx_pdus,
1363 			     resp_cqe->task_stat.read_stat.num_data_ins);
1364 		ADD_STATS_64(hba, rx_bytes,
1365 			     bnx2i_cmd->req.total_data_transfer_length);
1366 	} else {
1367 		conn->dataout_pdus_cnt +=
1368 			resp_cqe->task_stat.write_stat.num_data_outs;
1369 		conn->r2t_pdus_cnt +=
1370 			resp_cqe->task_stat.write_stat.num_r2ts;
1371 		conn->txdata_octets +=
1372 			bnx2i_cmd->req.total_data_transfer_length;
1373 		ADD_STATS_64(hba, tx_pdus,
1374 			     resp_cqe->task_stat.write_stat.num_data_outs);
1375 		ADD_STATS_64(hba, tx_bytes,
1376 			     bnx2i_cmd->req.total_data_transfer_length);
1377 		ADD_STATS_64(hba, rx_pdus,
1378 			     resp_cqe->task_stat.write_stat.num_r2ts);
1379 	}
1380 	bnx2i_iscsi_unmap_sg_list(bnx2i_cmd);
1381 
1382 	hdr = (struct iscsi_scsi_rsp *)task->hdr;
1383 	resp_cqe = (struct bnx2i_cmd_response *)cqe;
1384 	hdr->opcode = resp_cqe->op_code;
1385 	hdr->max_cmdsn = cpu_to_be32(resp_cqe->max_cmd_sn);
1386 	hdr->exp_cmdsn = cpu_to_be32(resp_cqe->exp_cmd_sn);
1387 	hdr->response = resp_cqe->response;
1388 	hdr->cmd_status = resp_cqe->status;
1389 	hdr->flags = resp_cqe->response_flags;
1390 	hdr->residual_count = cpu_to_be32(resp_cqe->residual_count);
1391 
1392 	if (resp_cqe->op_code == ISCSI_OP_SCSI_DATA_IN)
1393 		goto done;
1394 
1395 	if (resp_cqe->status == SAM_STAT_CHECK_CONDITION) {
1396 		datalen = resp_cqe->data_length;
1397 		if (datalen < 2)
1398 			goto done;
1399 
1400 		if (datalen > BNX2I_RQ_WQE_SIZE) {
1401 			iscsi_conn_printk(KERN_ERR, conn,
1402 					  "sense data len %d > RQ sz\n",
1403 					  datalen);
1404 			datalen = BNX2I_RQ_WQE_SIZE;
1405 		} else if (datalen > ISCSI_DEF_MAX_RECV_SEG_LEN) {
1406 			iscsi_conn_printk(KERN_ERR, conn,
1407 					  "sense data len %d > conn data\n",
1408 					  datalen);
1409 			datalen = ISCSI_DEF_MAX_RECV_SEG_LEN;
1410 		}
1411 
1412 		bnx2i_get_rq_buf(bnx2i_cmd->conn, conn->data, datalen);
1413 		bnx2i_put_rq_buf(bnx2i_cmd->conn, 1);
1414 	}
1415 
1416 done:
1417 	__iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr,
1418 			     conn->data, datalen);
1419 fail:
1420 	spin_unlock_bh(&session->back_lock);
1421 	return 0;
1422 }
1423 
1424 
1425 /**
1426  * bnx2i_process_login_resp - this function handles iscsi login response
1427  * @session:		iscsi session pointer
1428  * @bnx2i_conn:		iscsi connection pointer
1429  * @cqe:		pointer to newly DMA'ed CQE entry for processing
1430  *
1431  * process Login Response CQE & complete it to open-iscsi user daemon
1432  */
bnx2i_process_login_resp(struct iscsi_session * session,struct bnx2i_conn * bnx2i_conn,struct cqe * cqe)1433 static int bnx2i_process_login_resp(struct iscsi_session *session,
1434 				    struct bnx2i_conn *bnx2i_conn,
1435 				    struct cqe *cqe)
1436 {
1437 	struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1438 	struct iscsi_task *task;
1439 	struct bnx2i_login_response *login;
1440 	struct iscsi_login_rsp *resp_hdr;
1441 	int pld_len;
1442 	int pad_len;
1443 
1444 	login = (struct bnx2i_login_response *) cqe;
1445 	spin_lock(&session->back_lock);
1446 	task = iscsi_itt_to_task(conn,
1447 				 login->itt & ISCSI_LOGIN_RESPONSE_INDEX);
1448 	if (!task)
1449 		goto done;
1450 
1451 	resp_hdr = (struct iscsi_login_rsp *) &bnx2i_conn->gen_pdu.resp_hdr;
1452 	memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1453 	resp_hdr->opcode = login->op_code;
1454 	resp_hdr->flags = login->response_flags;
1455 	resp_hdr->max_version = login->version_max;
1456 	resp_hdr->active_version = login->version_active;
1457 	resp_hdr->hlength = 0;
1458 
1459 	hton24(resp_hdr->dlength, login->data_length);
1460 	memcpy(resp_hdr->isid, &login->isid_lo, 6);
1461 	resp_hdr->tsih = cpu_to_be16(login->tsih);
1462 	resp_hdr->itt = task->hdr->itt;
1463 	resp_hdr->statsn = cpu_to_be32(login->stat_sn);
1464 	resp_hdr->exp_cmdsn = cpu_to_be32(login->exp_cmd_sn);
1465 	resp_hdr->max_cmdsn = cpu_to_be32(login->max_cmd_sn);
1466 	resp_hdr->status_class = login->status_class;
1467 	resp_hdr->status_detail = login->status_detail;
1468 	pld_len = login->data_length;
1469 	bnx2i_conn->gen_pdu.resp_wr_ptr =
1470 					bnx2i_conn->gen_pdu.resp_buf + pld_len;
1471 
1472 	pad_len = 0;
1473 	if (pld_len & 0x3)
1474 		pad_len = 4 - (pld_len % 4);
1475 
1476 	if (pad_len) {
1477 		int i = 0;
1478 		for (i = 0; i < pad_len; i++) {
1479 			bnx2i_conn->gen_pdu.resp_wr_ptr[0] = 0;
1480 			bnx2i_conn->gen_pdu.resp_wr_ptr++;
1481 		}
1482 	}
1483 
1484 	__iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr,
1485 		bnx2i_conn->gen_pdu.resp_buf,
1486 		bnx2i_conn->gen_pdu.resp_wr_ptr - bnx2i_conn->gen_pdu.resp_buf);
1487 done:
1488 	spin_unlock(&session->back_lock);
1489 	return 0;
1490 }
1491 
1492 
1493 /**
1494  * bnx2i_process_text_resp - this function handles iscsi text response
1495  * @session:	iscsi session pointer
1496  * @bnx2i_conn:	iscsi connection pointer
1497  * @cqe:	pointer to newly DMA'ed CQE entry for processing
1498  *
1499  * process iSCSI Text Response CQE&  complete it to open-iscsi user daemon
1500  */
bnx2i_process_text_resp(struct iscsi_session * session,struct bnx2i_conn * bnx2i_conn,struct cqe * cqe)1501 static int bnx2i_process_text_resp(struct iscsi_session *session,
1502 				   struct bnx2i_conn *bnx2i_conn,
1503 				   struct cqe *cqe)
1504 {
1505 	struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1506 	struct iscsi_task *task;
1507 	struct bnx2i_text_response *text;
1508 	struct iscsi_text_rsp *resp_hdr;
1509 	int pld_len;
1510 	int pad_len;
1511 
1512 	text = (struct bnx2i_text_response *) cqe;
1513 	spin_lock(&session->back_lock);
1514 	task = iscsi_itt_to_task(conn, text->itt & ISCSI_LOGIN_RESPONSE_INDEX);
1515 	if (!task)
1516 		goto done;
1517 
1518 	resp_hdr = (struct iscsi_text_rsp *)&bnx2i_conn->gen_pdu.resp_hdr;
1519 	memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1520 	resp_hdr->opcode = text->op_code;
1521 	resp_hdr->flags = text->response_flags;
1522 	resp_hdr->hlength = 0;
1523 
1524 	hton24(resp_hdr->dlength, text->data_length);
1525 	resp_hdr->itt = task->hdr->itt;
1526 	resp_hdr->ttt = cpu_to_be32(text->ttt);
1527 	resp_hdr->statsn = task->hdr->exp_statsn;
1528 	resp_hdr->exp_cmdsn = cpu_to_be32(text->exp_cmd_sn);
1529 	resp_hdr->max_cmdsn = cpu_to_be32(text->max_cmd_sn);
1530 	pld_len = text->data_length;
1531 	bnx2i_conn->gen_pdu.resp_wr_ptr = bnx2i_conn->gen_pdu.resp_buf +
1532 					  pld_len;
1533 	pad_len = 0;
1534 	if (pld_len & 0x3)
1535 		pad_len = 4 - (pld_len % 4);
1536 
1537 	if (pad_len) {
1538 		int i = 0;
1539 		for (i = 0; i < pad_len; i++) {
1540 			bnx2i_conn->gen_pdu.resp_wr_ptr[0] = 0;
1541 			bnx2i_conn->gen_pdu.resp_wr_ptr++;
1542 		}
1543 	}
1544 	__iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr,
1545 			     bnx2i_conn->gen_pdu.resp_buf,
1546 			     bnx2i_conn->gen_pdu.resp_wr_ptr -
1547 			     bnx2i_conn->gen_pdu.resp_buf);
1548 done:
1549 	spin_unlock(&session->back_lock);
1550 	return 0;
1551 }
1552 
1553 
1554 /**
1555  * bnx2i_process_tmf_resp - this function handles iscsi TMF response
1556  * @session:		iscsi session pointer
1557  * @bnx2i_conn:		iscsi connection pointer
1558  * @cqe:		pointer to newly DMA'ed CQE entry for processing
1559  *
1560  * process iSCSI TMF Response CQE and wake up the driver eh thread.
1561  */
bnx2i_process_tmf_resp(struct iscsi_session * session,struct bnx2i_conn * bnx2i_conn,struct cqe * cqe)1562 static int bnx2i_process_tmf_resp(struct iscsi_session *session,
1563 				  struct bnx2i_conn *bnx2i_conn,
1564 				  struct cqe *cqe)
1565 {
1566 	struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1567 	struct iscsi_task *task;
1568 	struct bnx2i_tmf_response *tmf_cqe;
1569 	struct iscsi_tm_rsp *resp_hdr;
1570 
1571 	tmf_cqe = (struct bnx2i_tmf_response *)cqe;
1572 	spin_lock(&session->back_lock);
1573 	task = iscsi_itt_to_task(conn,
1574 				 tmf_cqe->itt & ISCSI_TMF_RESPONSE_INDEX);
1575 	if (!task)
1576 		goto done;
1577 
1578 	resp_hdr = (struct iscsi_tm_rsp *) &bnx2i_conn->gen_pdu.resp_hdr;
1579 	memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1580 	resp_hdr->opcode = tmf_cqe->op_code;
1581 	resp_hdr->max_cmdsn = cpu_to_be32(tmf_cqe->max_cmd_sn);
1582 	resp_hdr->exp_cmdsn = cpu_to_be32(tmf_cqe->exp_cmd_sn);
1583 	resp_hdr->itt = task->hdr->itt;
1584 	resp_hdr->response = tmf_cqe->response;
1585 
1586 	__iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0);
1587 done:
1588 	spin_unlock(&session->back_lock);
1589 	return 0;
1590 }
1591 
1592 /**
1593  * bnx2i_process_logout_resp - this function handles iscsi logout response
1594  * @session:		iscsi session pointer
1595  * @bnx2i_conn:		iscsi connection pointer
1596  * @cqe:		pointer to newly DMA'ed CQE entry for processing
1597  *
1598  * process iSCSI Logout Response CQE & make function call to
1599  * notify the user daemon.
1600  */
bnx2i_process_logout_resp(struct iscsi_session * session,struct bnx2i_conn * bnx2i_conn,struct cqe * cqe)1601 static int bnx2i_process_logout_resp(struct iscsi_session *session,
1602 				     struct bnx2i_conn *bnx2i_conn,
1603 				     struct cqe *cqe)
1604 {
1605 	struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1606 	struct iscsi_task *task;
1607 	struct bnx2i_logout_response *logout;
1608 	struct iscsi_logout_rsp *resp_hdr;
1609 
1610 	logout = (struct bnx2i_logout_response *) cqe;
1611 	spin_lock(&session->back_lock);
1612 	task = iscsi_itt_to_task(conn,
1613 				 logout->itt & ISCSI_LOGOUT_RESPONSE_INDEX);
1614 	if (!task)
1615 		goto done;
1616 
1617 	resp_hdr = (struct iscsi_logout_rsp *) &bnx2i_conn->gen_pdu.resp_hdr;
1618 	memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1619 	resp_hdr->opcode = logout->op_code;
1620 	resp_hdr->flags = logout->response;
1621 	resp_hdr->hlength = 0;
1622 
1623 	resp_hdr->itt = task->hdr->itt;
1624 	resp_hdr->statsn = task->hdr->exp_statsn;
1625 	resp_hdr->exp_cmdsn = cpu_to_be32(logout->exp_cmd_sn);
1626 	resp_hdr->max_cmdsn = cpu_to_be32(logout->max_cmd_sn);
1627 
1628 	resp_hdr->t2wait = cpu_to_be32(logout->time_to_wait);
1629 	resp_hdr->t2retain = cpu_to_be32(logout->time_to_retain);
1630 
1631 	__iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0);
1632 
1633 	bnx2i_conn->ep->state = EP_STATE_LOGOUT_RESP_RCVD;
1634 done:
1635 	spin_unlock(&session->back_lock);
1636 	return 0;
1637 }
1638 
1639 /**
1640  * bnx2i_process_nopin_local_cmpl - this function handles iscsi nopin CQE
1641  * @session:		iscsi session pointer
1642  * @bnx2i_conn:		iscsi connection pointer
1643  * @cqe:		pointer to newly DMA'ed CQE entry for processing
1644  *
1645  * process iSCSI NOPIN local completion CQE, frees IIT and command structures
1646  */
bnx2i_process_nopin_local_cmpl(struct iscsi_session * session,struct bnx2i_conn * bnx2i_conn,struct cqe * cqe)1647 static void bnx2i_process_nopin_local_cmpl(struct iscsi_session *session,
1648 					   struct bnx2i_conn *bnx2i_conn,
1649 					   struct cqe *cqe)
1650 {
1651 	struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1652 	struct bnx2i_nop_in_msg *nop_in;
1653 	struct iscsi_task *task;
1654 
1655 	nop_in = (struct bnx2i_nop_in_msg *)cqe;
1656 	spin_lock(&session->back_lock);
1657 	task = iscsi_itt_to_task(conn,
1658 				 nop_in->itt & ISCSI_NOP_IN_MSG_INDEX);
1659 	if (task)
1660 		__iscsi_put_task(task);
1661 	spin_unlock(&session->back_lock);
1662 }
1663 
1664 /**
1665  * bnx2i_unsol_pdu_adjust_rq - makes adjustments to RQ after unsol pdu is recvd
1666  * @bnx2i_conn:	iscsi connection
1667  *
1668  * Firmware advances RQ producer index for every unsolicited PDU even if
1669  *	payload data length is '0'. This function makes corresponding
1670  *	adjustments on the driver side to match this f/w behavior
1671  */
bnx2i_unsol_pdu_adjust_rq(struct bnx2i_conn * bnx2i_conn)1672 static void bnx2i_unsol_pdu_adjust_rq(struct bnx2i_conn *bnx2i_conn)
1673 {
1674 	char dummy_rq_data[2];
1675 	bnx2i_get_rq_buf(bnx2i_conn, dummy_rq_data, 1);
1676 	bnx2i_put_rq_buf(bnx2i_conn, 1);
1677 }
1678 
1679 
1680 /**
1681  * bnx2i_process_nopin_mesg - this function handles iscsi nopin CQE
1682  * @session:		iscsi session pointer
1683  * @bnx2i_conn:		iscsi connection pointer
1684  * @cqe:		pointer to newly DMA'ed CQE entry for processing
1685  *
1686  * process iSCSI target's proactive iSCSI NOPIN request
1687  */
bnx2i_process_nopin_mesg(struct iscsi_session * session,struct bnx2i_conn * bnx2i_conn,struct cqe * cqe)1688 static int bnx2i_process_nopin_mesg(struct iscsi_session *session,
1689 				     struct bnx2i_conn *bnx2i_conn,
1690 				     struct cqe *cqe)
1691 {
1692 	struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1693 	struct iscsi_task *task;
1694 	struct bnx2i_nop_in_msg *nop_in;
1695 	struct iscsi_nopin *hdr;
1696 	int tgt_async_nop = 0;
1697 
1698 	nop_in = (struct bnx2i_nop_in_msg *)cqe;
1699 
1700 	spin_lock(&session->back_lock);
1701 	hdr = (struct iscsi_nopin *)&bnx2i_conn->gen_pdu.resp_hdr;
1702 	memset(hdr, 0, sizeof(struct iscsi_hdr));
1703 	hdr->opcode = nop_in->op_code;
1704 	hdr->max_cmdsn = cpu_to_be32(nop_in->max_cmd_sn);
1705 	hdr->exp_cmdsn = cpu_to_be32(nop_in->exp_cmd_sn);
1706 	hdr->ttt = cpu_to_be32(nop_in->ttt);
1707 
1708 	if (nop_in->itt == (u16) RESERVED_ITT) {
1709 		bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
1710 		hdr->itt = RESERVED_ITT;
1711 		tgt_async_nop = 1;
1712 		goto done;
1713 	}
1714 
1715 	/* this is a response to one of our nop-outs */
1716 	task = iscsi_itt_to_task(conn,
1717 			 (itt_t) (nop_in->itt & ISCSI_NOP_IN_MSG_INDEX));
1718 	if (task) {
1719 		hdr->flags = ISCSI_FLAG_CMD_FINAL;
1720 		hdr->itt = task->hdr->itt;
1721 		hdr->ttt = cpu_to_be32(nop_in->ttt);
1722 		memcpy(&hdr->lun, nop_in->lun, 8);
1723 	}
1724 done:
1725 	__iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, NULL, 0);
1726 	spin_unlock(&session->back_lock);
1727 
1728 	return tgt_async_nop;
1729 }
1730 
1731 
1732 /**
1733  * bnx2i_process_async_mesg - this function handles iscsi async message
1734  * @session:		iscsi session pointer
1735  * @bnx2i_conn:		iscsi connection pointer
1736  * @cqe:		pointer to newly DMA'ed CQE entry for processing
1737  *
1738  * process iSCSI ASYNC Message
1739  */
bnx2i_process_async_mesg(struct iscsi_session * session,struct bnx2i_conn * bnx2i_conn,struct cqe * cqe)1740 static void bnx2i_process_async_mesg(struct iscsi_session *session,
1741 				     struct bnx2i_conn *bnx2i_conn,
1742 				     struct cqe *cqe)
1743 {
1744 	struct bnx2i_async_msg *async_cqe;
1745 	struct iscsi_async *resp_hdr;
1746 	u8 async_event;
1747 
1748 	bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
1749 
1750 	async_cqe = (struct bnx2i_async_msg *)cqe;
1751 	async_event = async_cqe->async_event;
1752 
1753 	if (async_event == ISCSI_ASYNC_MSG_SCSI_EVENT) {
1754 		iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data,
1755 				  "async: scsi events not supported\n");
1756 		return;
1757 	}
1758 
1759 	spin_lock(&session->back_lock);
1760 	resp_hdr = (struct iscsi_async *) &bnx2i_conn->gen_pdu.resp_hdr;
1761 	memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1762 	resp_hdr->opcode = async_cqe->op_code;
1763 	resp_hdr->flags = 0x80;
1764 
1765 	memcpy(&resp_hdr->lun, async_cqe->lun, 8);
1766 	resp_hdr->exp_cmdsn = cpu_to_be32(async_cqe->exp_cmd_sn);
1767 	resp_hdr->max_cmdsn = cpu_to_be32(async_cqe->max_cmd_sn);
1768 
1769 	resp_hdr->async_event = async_cqe->async_event;
1770 	resp_hdr->async_vcode = async_cqe->async_vcode;
1771 
1772 	resp_hdr->param1 = cpu_to_be16(async_cqe->param1);
1773 	resp_hdr->param2 = cpu_to_be16(async_cqe->param2);
1774 	resp_hdr->param3 = cpu_to_be16(async_cqe->param3);
1775 
1776 	__iscsi_complete_pdu(bnx2i_conn->cls_conn->dd_data,
1777 			     (struct iscsi_hdr *)resp_hdr, NULL, 0);
1778 	spin_unlock(&session->back_lock);
1779 }
1780 
1781 
1782 /**
1783  * bnx2i_process_reject_mesg - process iscsi reject pdu
1784  * @session:		iscsi session pointer
1785  * @bnx2i_conn:		iscsi connection pointer
1786  * @cqe:		pointer to newly DMA'ed CQE entry for processing
1787  *
1788  * process iSCSI REJECT message
1789  */
bnx2i_process_reject_mesg(struct iscsi_session * session,struct bnx2i_conn * bnx2i_conn,struct cqe * cqe)1790 static void bnx2i_process_reject_mesg(struct iscsi_session *session,
1791 				      struct bnx2i_conn *bnx2i_conn,
1792 				      struct cqe *cqe)
1793 {
1794 	struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1795 	struct bnx2i_reject_msg *reject;
1796 	struct iscsi_reject *hdr;
1797 
1798 	reject = (struct bnx2i_reject_msg *) cqe;
1799 	if (reject->data_length) {
1800 		bnx2i_get_rq_buf(bnx2i_conn, conn->data, reject->data_length);
1801 		bnx2i_put_rq_buf(bnx2i_conn, 1);
1802 	} else
1803 		bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
1804 
1805 	spin_lock(&session->back_lock);
1806 	hdr = (struct iscsi_reject *) &bnx2i_conn->gen_pdu.resp_hdr;
1807 	memset(hdr, 0, sizeof(struct iscsi_hdr));
1808 	hdr->opcode = reject->op_code;
1809 	hdr->reason = reject->reason;
1810 	hton24(hdr->dlength, reject->data_length);
1811 	hdr->max_cmdsn = cpu_to_be32(reject->max_cmd_sn);
1812 	hdr->exp_cmdsn = cpu_to_be32(reject->exp_cmd_sn);
1813 	hdr->ffffffff = cpu_to_be32(RESERVED_ITT);
1814 	__iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, conn->data,
1815 			     reject->data_length);
1816 	spin_unlock(&session->back_lock);
1817 }
1818 
1819 /**
1820  * bnx2i_process_cmd_cleanup_resp - process scsi command clean-up completion
1821  * @session:		iscsi session pointer
1822  * @bnx2i_conn:		iscsi connection pointer
1823  * @cqe:		pointer to newly DMA'ed CQE entry for processing
1824  *
1825  * process command cleanup response CQE during conn shutdown or error recovery
1826  */
bnx2i_process_cmd_cleanup_resp(struct iscsi_session * session,struct bnx2i_conn * bnx2i_conn,struct cqe * cqe)1827 static void bnx2i_process_cmd_cleanup_resp(struct iscsi_session *session,
1828 					   struct bnx2i_conn *bnx2i_conn,
1829 					   struct cqe *cqe)
1830 {
1831 	struct bnx2i_cleanup_response *cmd_clean_rsp;
1832 	struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1833 	struct iscsi_task *task;
1834 
1835 	cmd_clean_rsp = (struct bnx2i_cleanup_response *)cqe;
1836 	spin_lock(&session->back_lock);
1837 	task = iscsi_itt_to_task(conn,
1838 			cmd_clean_rsp->itt & ISCSI_CLEANUP_RESPONSE_INDEX);
1839 	if (!task)
1840 		printk(KERN_ALERT "bnx2i: cmd clean ITT %x not active\n",
1841 			cmd_clean_rsp->itt & ISCSI_CLEANUP_RESPONSE_INDEX);
1842 	spin_unlock(&session->back_lock);
1843 	complete(&bnx2i_conn->cmd_cleanup_cmpl);
1844 }
1845 
1846 
1847 /**
1848  * bnx2i_percpu_io_thread - thread per cpu for ios
1849  *
1850  * @arg:	ptr to bnx2i_percpu_info structure
1851  */
bnx2i_percpu_io_thread(void * arg)1852 int bnx2i_percpu_io_thread(void *arg)
1853 {
1854 	struct bnx2i_percpu_s *p = arg;
1855 	struct bnx2i_work *work, *tmp;
1856 	LIST_HEAD(work_list);
1857 
1858 	set_user_nice(current, MIN_NICE);
1859 
1860 	while (!kthread_should_stop()) {
1861 		spin_lock_bh(&p->p_work_lock);
1862 		while (!list_empty(&p->work_list)) {
1863 			list_splice_init(&p->work_list, &work_list);
1864 			spin_unlock_bh(&p->p_work_lock);
1865 
1866 			list_for_each_entry_safe(work, tmp, &work_list, list) {
1867 				list_del_init(&work->list);
1868 				/* work allocated in the bh, freed here */
1869 				bnx2i_process_scsi_cmd_resp(work->session,
1870 							    work->bnx2i_conn,
1871 							    &work->cqe);
1872 				atomic_dec(&work->bnx2i_conn->work_cnt);
1873 				kfree(work);
1874 			}
1875 			spin_lock_bh(&p->p_work_lock);
1876 		}
1877 		set_current_state(TASK_INTERRUPTIBLE);
1878 		spin_unlock_bh(&p->p_work_lock);
1879 		schedule();
1880 	}
1881 	__set_current_state(TASK_RUNNING);
1882 
1883 	return 0;
1884 }
1885 
1886 
1887 /**
1888  * bnx2i_queue_scsi_cmd_resp - queue cmd completion to the percpu thread
1889  * @session:		iscsi session
1890  * @bnx2i_conn:		bnx2i connection
1891  * @cqe:		pointer to newly DMA'ed CQE entry for processing
1892  *
1893  * this function is called by generic KCQ handler to queue all pending cmd
1894  * completion CQEs
1895  *
1896  * The implementation is to queue the cmd response based on the
1897  * last recorded command for the given connection.  The
1898  * cpu_id gets recorded upon task_xmit.  No out-of-order completion!
1899  */
bnx2i_queue_scsi_cmd_resp(struct iscsi_session * session,struct bnx2i_conn * bnx2i_conn,struct bnx2i_nop_in_msg * cqe)1900 static int bnx2i_queue_scsi_cmd_resp(struct iscsi_session *session,
1901 				     struct bnx2i_conn *bnx2i_conn,
1902 				     struct bnx2i_nop_in_msg *cqe)
1903 {
1904 	struct bnx2i_work *bnx2i_work = NULL;
1905 	struct bnx2i_percpu_s *p = NULL;
1906 	struct iscsi_task *task;
1907 	struct scsi_cmnd *sc;
1908 	int rc = 0;
1909 
1910 	spin_lock(&session->back_lock);
1911 	task = iscsi_itt_to_task(bnx2i_conn->cls_conn->dd_data,
1912 				 cqe->itt & ISCSI_CMD_RESPONSE_INDEX);
1913 	if (!task || !task->sc) {
1914 		spin_unlock(&session->back_lock);
1915 		return -EINVAL;
1916 	}
1917 	sc = task->sc;
1918 
1919 	spin_unlock(&session->back_lock);
1920 
1921 	p = &per_cpu(bnx2i_percpu, blk_mq_rq_cpu(scsi_cmd_to_rq(sc)));
1922 	spin_lock(&p->p_work_lock);
1923 	if (unlikely(!p->iothread)) {
1924 		rc = -EINVAL;
1925 		goto err;
1926 	}
1927 	/* Alloc and copy to the cqe */
1928 	bnx2i_work = kzalloc(sizeof(struct bnx2i_work), GFP_ATOMIC);
1929 	if (bnx2i_work) {
1930 		INIT_LIST_HEAD(&bnx2i_work->list);
1931 		bnx2i_work->session = session;
1932 		bnx2i_work->bnx2i_conn = bnx2i_conn;
1933 		memcpy(&bnx2i_work->cqe, cqe, sizeof(struct cqe));
1934 		list_add_tail(&bnx2i_work->list, &p->work_list);
1935 		atomic_inc(&bnx2i_conn->work_cnt);
1936 		wake_up_process(p->iothread);
1937 		spin_unlock(&p->p_work_lock);
1938 		goto done;
1939 	} else
1940 		rc = -ENOMEM;
1941 err:
1942 	spin_unlock(&p->p_work_lock);
1943 	bnx2i_process_scsi_cmd_resp(session, bnx2i_conn, (struct cqe *)cqe);
1944 done:
1945 	return rc;
1946 }
1947 
1948 
1949 /**
1950  * bnx2i_process_new_cqes - process newly DMA'ed CQE's
1951  * @bnx2i_conn:		bnx2i connection
1952  *
1953  * this function is called by generic KCQ handler to process all pending CQE's
1954  */
bnx2i_process_new_cqes(struct bnx2i_conn * bnx2i_conn)1955 static int bnx2i_process_new_cqes(struct bnx2i_conn *bnx2i_conn)
1956 {
1957 	struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1958 	struct iscsi_session *session = conn->session;
1959 	struct bnx2i_hba *hba = bnx2i_conn->hba;
1960 	struct qp_info *qp;
1961 	struct bnx2i_nop_in_msg *nopin;
1962 	int tgt_async_msg;
1963 	int cqe_cnt = 0;
1964 
1965 	if (bnx2i_conn->ep == NULL)
1966 		return 0;
1967 
1968 	qp = &bnx2i_conn->ep->qp;
1969 
1970 	if (!qp->cq_virt) {
1971 		printk(KERN_ALERT "bnx2i (%s): cq resr freed in bh execution!",
1972 		       hba->netdev->name);
1973 		goto out;
1974 	}
1975 	while (1) {
1976 		nopin = (struct bnx2i_nop_in_msg *) qp->cq_cons_qe;
1977 		if (nopin->cq_req_sn != qp->cqe_exp_seq_sn)
1978 			break;
1979 
1980 		if (unlikely(test_bit(ISCSI_CONN_FLAG_SUSPEND_RX, &conn->flags))) {
1981 			if (nopin->op_code == ISCSI_OP_NOOP_IN &&
1982 			    nopin->itt == (u16) RESERVED_ITT) {
1983 				printk(KERN_ALERT "bnx2i: Unsolicited "
1984 				       "NOP-In detected for suspended "
1985 				       "connection dev=%s!\n",
1986 				       hba->netdev->name);
1987 				bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
1988 				goto cqe_out;
1989 			}
1990 			break;
1991 		}
1992 		tgt_async_msg = 0;
1993 
1994 		switch (nopin->op_code) {
1995 		case ISCSI_OP_SCSI_CMD_RSP:
1996 		case ISCSI_OP_SCSI_DATA_IN:
1997 			/* Run the kthread engine only for data cmds
1998 			   All other cmds will be completed in this bh! */
1999 			bnx2i_queue_scsi_cmd_resp(session, bnx2i_conn, nopin);
2000 			goto done;
2001 		case ISCSI_OP_LOGIN_RSP:
2002 			bnx2i_process_login_resp(session, bnx2i_conn,
2003 						 qp->cq_cons_qe);
2004 			break;
2005 		case ISCSI_OP_SCSI_TMFUNC_RSP:
2006 			bnx2i_process_tmf_resp(session, bnx2i_conn,
2007 					       qp->cq_cons_qe);
2008 			break;
2009 		case ISCSI_OP_TEXT_RSP:
2010 			bnx2i_process_text_resp(session, bnx2i_conn,
2011 						qp->cq_cons_qe);
2012 			break;
2013 		case ISCSI_OP_LOGOUT_RSP:
2014 			bnx2i_process_logout_resp(session, bnx2i_conn,
2015 						  qp->cq_cons_qe);
2016 			break;
2017 		case ISCSI_OP_NOOP_IN:
2018 			if (bnx2i_process_nopin_mesg(session, bnx2i_conn,
2019 						     qp->cq_cons_qe))
2020 				tgt_async_msg = 1;
2021 			break;
2022 		case ISCSI_OPCODE_NOPOUT_LOCAL_COMPLETION:
2023 			bnx2i_process_nopin_local_cmpl(session, bnx2i_conn,
2024 						       qp->cq_cons_qe);
2025 			break;
2026 		case ISCSI_OP_ASYNC_EVENT:
2027 			bnx2i_process_async_mesg(session, bnx2i_conn,
2028 						 qp->cq_cons_qe);
2029 			tgt_async_msg = 1;
2030 			break;
2031 		case ISCSI_OP_REJECT:
2032 			bnx2i_process_reject_mesg(session, bnx2i_conn,
2033 						  qp->cq_cons_qe);
2034 			break;
2035 		case ISCSI_OPCODE_CLEANUP_RESPONSE:
2036 			bnx2i_process_cmd_cleanup_resp(session, bnx2i_conn,
2037 						       qp->cq_cons_qe);
2038 			break;
2039 		default:
2040 			printk(KERN_ALERT "bnx2i: unknown opcode 0x%x\n",
2041 					  nopin->op_code);
2042 		}
2043 
2044 		ADD_STATS_64(hba, rx_pdus, 1);
2045 		ADD_STATS_64(hba, rx_bytes, nopin->data_length);
2046 done:
2047 		if (!tgt_async_msg) {
2048 			if (!atomic_read(&bnx2i_conn->ep->num_active_cmds))
2049 				printk(KERN_ALERT "bnx2i (%s): no active cmd! "
2050 				       "op 0x%x\n",
2051 				       hba->netdev->name,
2052 				       nopin->op_code);
2053 			else
2054 				atomic_dec(&bnx2i_conn->ep->num_active_cmds);
2055 		}
2056 cqe_out:
2057 		/* clear out in production version only, till beta keep opcode
2058 		 * field intact, will be helpful in debugging (context dump)
2059 		 * nopin->op_code = 0;
2060 		 */
2061 		cqe_cnt++;
2062 		qp->cqe_exp_seq_sn++;
2063 		if (qp->cqe_exp_seq_sn == (qp->cqe_size * 2 + 1))
2064 			qp->cqe_exp_seq_sn = ISCSI_INITIAL_SN;
2065 
2066 		if (qp->cq_cons_qe == qp->cq_last_qe) {
2067 			qp->cq_cons_qe = qp->cq_first_qe;
2068 			qp->cq_cons_idx = 0;
2069 		} else {
2070 			qp->cq_cons_qe++;
2071 			qp->cq_cons_idx++;
2072 		}
2073 	}
2074 out:
2075 	return cqe_cnt;
2076 }
2077 
2078 /**
2079  * bnx2i_fastpath_notification - process global event queue (KCQ)
2080  * @hba:		adapter structure pointer
2081  * @new_cqe_kcqe:	pointer to newly DMA'ed KCQE entry
2082  *
2083  * Fast path event notification handler, KCQ entry carries context id
2084  *	of the connection that has 1 or more pending CQ entries
2085  */
bnx2i_fastpath_notification(struct bnx2i_hba * hba,struct iscsi_kcqe * new_cqe_kcqe)2086 static void bnx2i_fastpath_notification(struct bnx2i_hba *hba,
2087 					struct iscsi_kcqe *new_cqe_kcqe)
2088 {
2089 	struct bnx2i_conn *bnx2i_conn;
2090 	u32 iscsi_cid;
2091 	int nxt_idx;
2092 
2093 	iscsi_cid = new_cqe_kcqe->iscsi_conn_id;
2094 	bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
2095 
2096 	if (!bnx2i_conn) {
2097 		printk(KERN_ALERT "cid #%x not valid\n", iscsi_cid);
2098 		return;
2099 	}
2100 	if (!bnx2i_conn->ep) {
2101 		printk(KERN_ALERT "cid #%x - ep not bound\n", iscsi_cid);
2102 		return;
2103 	}
2104 
2105 	bnx2i_process_new_cqes(bnx2i_conn);
2106 	nxt_idx = bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep,
2107 						CNIC_ARM_CQE_FP);
2108 	if (nxt_idx && nxt_idx == bnx2i_process_new_cqes(bnx2i_conn))
2109 		bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep, CNIC_ARM_CQE_FP);
2110 }
2111 
2112 
2113 /**
2114  * bnx2i_process_update_conn_cmpl - process iscsi conn update completion KCQE
2115  * @hba:		adapter structure pointer
2116  * @update_kcqe:	kcqe pointer
2117  *
2118  * CONN_UPDATE completion handler, this completes iSCSI connection FFP migration
2119  */
bnx2i_process_update_conn_cmpl(struct bnx2i_hba * hba,struct iscsi_kcqe * update_kcqe)2120 static void bnx2i_process_update_conn_cmpl(struct bnx2i_hba *hba,
2121 					   struct iscsi_kcqe *update_kcqe)
2122 {
2123 	struct bnx2i_conn *conn;
2124 	u32 iscsi_cid;
2125 
2126 	iscsi_cid = update_kcqe->iscsi_conn_id;
2127 	conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
2128 
2129 	if (!conn) {
2130 		printk(KERN_ALERT "conn_update: cid %x not valid\n", iscsi_cid);
2131 		return;
2132 	}
2133 	if (!conn->ep) {
2134 		printk(KERN_ALERT "cid %x does not have ep bound\n", iscsi_cid);
2135 		return;
2136 	}
2137 
2138 	if (update_kcqe->completion_status) {
2139 		printk(KERN_ALERT "request failed cid %x\n", iscsi_cid);
2140 		conn->ep->state = EP_STATE_ULP_UPDATE_FAILED;
2141 	} else
2142 		conn->ep->state = EP_STATE_ULP_UPDATE_COMPL;
2143 
2144 	wake_up_interruptible(&conn->ep->ofld_wait);
2145 }
2146 
2147 
2148 /**
2149  * bnx2i_recovery_que_add_conn - add connection to recovery queue
2150  * @hba:		adapter structure pointer
2151  * @bnx2i_conn:		iscsi connection
2152  *
2153  * Add connection to recovery queue and schedule adapter eh worker
2154  */
bnx2i_recovery_que_add_conn(struct bnx2i_hba * hba,struct bnx2i_conn * bnx2i_conn)2155 static void bnx2i_recovery_que_add_conn(struct bnx2i_hba *hba,
2156 					struct bnx2i_conn *bnx2i_conn)
2157 {
2158 	iscsi_conn_failure(bnx2i_conn->cls_conn->dd_data,
2159 			   ISCSI_ERR_CONN_FAILED);
2160 }
2161 
2162 
2163 /**
2164  * bnx2i_process_tcp_error - process error notification on a given connection
2165  *
2166  * @hba: 		adapter structure pointer
2167  * @tcp_err: 		tcp error kcqe pointer
2168  *
2169  * handles tcp level error notifications from FW.
2170  */
bnx2i_process_tcp_error(struct bnx2i_hba * hba,struct iscsi_kcqe * tcp_err)2171 static void bnx2i_process_tcp_error(struct bnx2i_hba *hba,
2172 				    struct iscsi_kcqe *tcp_err)
2173 {
2174 	struct bnx2i_conn *bnx2i_conn;
2175 	u32 iscsi_cid;
2176 
2177 	iscsi_cid = tcp_err->iscsi_conn_id;
2178 	bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
2179 
2180 	if (!bnx2i_conn) {
2181 		printk(KERN_ALERT "bnx2i - cid 0x%x not valid\n", iscsi_cid);
2182 		return;
2183 	}
2184 
2185 	printk(KERN_ALERT "bnx2i - cid 0x%x had TCP errors, error code 0x%x\n",
2186 			  iscsi_cid, tcp_err->completion_status);
2187 	bnx2i_recovery_que_add_conn(bnx2i_conn->hba, bnx2i_conn);
2188 }
2189 
2190 
2191 /**
2192  * bnx2i_process_iscsi_error - process error notification on a given connection
2193  * @hba:		adapter structure pointer
2194  * @iscsi_err:		iscsi error kcqe pointer
2195  *
2196  * handles iscsi error notifications from the FW. Firmware based in initial
2197  *	handshake classifies iscsi protocol / TCP rfc violation into either
2198  *	warning or error indications. If indication is of "Error" type, driver
2199  *	will initiate session recovery for that connection/session. For
2200  *	"Warning" type indication, driver will put out a system log message
2201  *	(there will be only one message for each type for the life of the
2202  *	session, this is to avoid un-necessarily overloading the system)
2203  */
bnx2i_process_iscsi_error(struct bnx2i_hba * hba,struct iscsi_kcqe * iscsi_err)2204 static void bnx2i_process_iscsi_error(struct bnx2i_hba *hba,
2205 				      struct iscsi_kcqe *iscsi_err)
2206 {
2207 	struct bnx2i_conn *bnx2i_conn;
2208 	u32 iscsi_cid;
2209 	const char *additional_notice = "";
2210 	const char *message;
2211 	int need_recovery;
2212 	u64 err_mask64;
2213 
2214 	iscsi_cid = iscsi_err->iscsi_conn_id;
2215 	bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
2216 	if (!bnx2i_conn) {
2217 		printk(KERN_ALERT "bnx2i - cid 0x%x not valid\n", iscsi_cid);
2218 		return;
2219 	}
2220 
2221 	err_mask64 = (0x1ULL << iscsi_err->completion_status);
2222 
2223 	if (err_mask64 & iscsi_error_mask) {
2224 		need_recovery = 0;
2225 		message = "iscsi_warning";
2226 	} else {
2227 		need_recovery = 1;
2228 		message = "iscsi_error";
2229 	}
2230 
2231 	switch (iscsi_err->completion_status) {
2232 	case ISCSI_KCQE_COMPLETION_STATUS_HDR_DIG_ERR:
2233 		additional_notice = "hdr digest err";
2234 		break;
2235 	case ISCSI_KCQE_COMPLETION_STATUS_DATA_DIG_ERR:
2236 		additional_notice = "data digest err";
2237 		break;
2238 	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_OPCODE:
2239 		additional_notice = "wrong opcode rcvd";
2240 		break;
2241 	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_AHS_LEN:
2242 		additional_notice = "AHS len > 0 rcvd";
2243 		break;
2244 	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_ITT:
2245 		additional_notice = "invalid ITT rcvd";
2246 		break;
2247 	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_STATSN:
2248 		additional_notice = "wrong StatSN rcvd";
2249 		break;
2250 	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_EXP_DATASN:
2251 		additional_notice = "wrong DataSN rcvd";
2252 		break;
2253 	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T:
2254 		additional_notice = "pend R2T violation";
2255 		break;
2256 	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_0:
2257 		additional_notice = "ERL0, UO";
2258 		break;
2259 	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_1:
2260 		additional_notice = "ERL0, U1";
2261 		break;
2262 	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_2:
2263 		additional_notice = "ERL0, U2";
2264 		break;
2265 	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_3:
2266 		additional_notice = "ERL0, U3";
2267 		break;
2268 	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_4:
2269 		additional_notice = "ERL0, U4";
2270 		break;
2271 	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_5:
2272 		additional_notice = "ERL0, U5";
2273 		break;
2274 	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_6:
2275 		additional_notice = "ERL0, U6";
2276 		break;
2277 	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REMAIN_RCV_LEN:
2278 		additional_notice = "invalid resi len";
2279 		break;
2280 	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_MAX_RCV_PDU_LEN:
2281 		additional_notice = "MRDSL violation";
2282 		break;
2283 	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_F_BIT_ZERO:
2284 		additional_notice = "F-bit not set";
2285 		break;
2286 	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_NOT_RSRV:
2287 		additional_notice = "invalid TTT";
2288 		break;
2289 	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DATASN:
2290 		additional_notice = "invalid DataSN";
2291 		break;
2292 	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REMAIN_BURST_LEN:
2293 		additional_notice = "burst len violation";
2294 		break;
2295 	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_BUFFER_OFF:
2296 		additional_notice = "buf offset violation";
2297 		break;
2298 	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_LUN:
2299 		additional_notice = "invalid LUN field";
2300 		break;
2301 	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_R2TSN:
2302 		additional_notice = "invalid R2TSN field";
2303 		break;
2304 #define BNX2I_ERR_DESIRED_DATA_TRNS_LEN_0 	\
2305 	ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_0
2306 	case BNX2I_ERR_DESIRED_DATA_TRNS_LEN_0:
2307 		additional_notice = "invalid cmd len1";
2308 		break;
2309 #define BNX2I_ERR_DESIRED_DATA_TRNS_LEN_1 	\
2310 	ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_1
2311 	case BNX2I_ERR_DESIRED_DATA_TRNS_LEN_1:
2312 		additional_notice = "invalid cmd len2";
2313 		break;
2314 	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T_EXCEED:
2315 		additional_notice = "pend r2t exceeds MaxOutstandingR2T value";
2316 		break;
2317 	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_IS_RSRV:
2318 		additional_notice = "TTT is rsvd";
2319 		break;
2320 	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_MAX_BURST_LEN:
2321 		additional_notice = "MBL violation";
2322 		break;
2323 #define BNX2I_ERR_DATA_SEG_LEN_NOT_ZERO 	\
2324 	ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DATA_SEG_LEN_NOT_ZERO
2325 	case BNX2I_ERR_DATA_SEG_LEN_NOT_ZERO:
2326 		additional_notice = "data seg len != 0";
2327 		break;
2328 	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REJECT_PDU_LEN:
2329 		additional_notice = "reject pdu len error";
2330 		break;
2331 	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_ASYNC_PDU_LEN:
2332 		additional_notice = "async pdu len error";
2333 		break;
2334 	case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_NOPIN_PDU_LEN:
2335 		additional_notice = "nopin pdu len error";
2336 		break;
2337 #define BNX2_ERR_PEND_R2T_IN_CLEANUP			\
2338 	ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T_IN_CLEANUP
2339 	case BNX2_ERR_PEND_R2T_IN_CLEANUP:
2340 		additional_notice = "pend r2t in cleanup";
2341 		break;
2342 
2343 	case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_IP_FRAGMENT:
2344 		additional_notice = "IP fragments rcvd";
2345 		break;
2346 	case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_IP_OPTIONS:
2347 		additional_notice = "IP options error";
2348 		break;
2349 	case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_URGENT_FLAG:
2350 		additional_notice = "urgent flag error";
2351 		break;
2352 	default:
2353 		printk(KERN_ALERT "iscsi_err - unknown err %x\n",
2354 				  iscsi_err->completion_status);
2355 	}
2356 
2357 	if (need_recovery) {
2358 		iscsi_conn_printk(KERN_ALERT,
2359 				  bnx2i_conn->cls_conn->dd_data,
2360 				  "bnx2i: %s - %s\n",
2361 				  message, additional_notice);
2362 
2363 		iscsi_conn_printk(KERN_ALERT,
2364 				  bnx2i_conn->cls_conn->dd_data,
2365 				  "conn_err - hostno %d conn %p, "
2366 				  "iscsi_cid %x cid %x\n",
2367 				  bnx2i_conn->hba->shost->host_no,
2368 				  bnx2i_conn, bnx2i_conn->ep->ep_iscsi_cid,
2369 				  bnx2i_conn->ep->ep_cid);
2370 		bnx2i_recovery_que_add_conn(bnx2i_conn->hba, bnx2i_conn);
2371 	} else
2372 		if (!test_and_set_bit(iscsi_err->completion_status,
2373 				      (void *) &bnx2i_conn->violation_notified))
2374 			iscsi_conn_printk(KERN_ALERT,
2375 					  bnx2i_conn->cls_conn->dd_data,
2376 					  "bnx2i: %s - %s\n",
2377 					  message, additional_notice);
2378 }
2379 
2380 
2381 /**
2382  * bnx2i_process_conn_destroy_cmpl - process iscsi conn destroy completion
2383  * @hba:		adapter structure pointer
2384  * @conn_destroy:	conn destroy kcqe pointer
2385  *
2386  * handles connection destroy completion request.
2387  */
bnx2i_process_conn_destroy_cmpl(struct bnx2i_hba * hba,struct iscsi_kcqe * conn_destroy)2388 static void bnx2i_process_conn_destroy_cmpl(struct bnx2i_hba *hba,
2389 					    struct iscsi_kcqe *conn_destroy)
2390 {
2391 	struct bnx2i_endpoint *ep;
2392 
2393 	ep = bnx2i_find_ep_in_destroy_list(hba, conn_destroy->iscsi_conn_id);
2394 	if (!ep) {
2395 		printk(KERN_ALERT "bnx2i_conn_destroy_cmpl: no pending "
2396 				  "offload request, unexpected completion\n");
2397 		return;
2398 	}
2399 
2400 	if (hba != ep->hba) {
2401 		printk(KERN_ALERT "conn destroy- error hba mismatch\n");
2402 		return;
2403 	}
2404 
2405 	if (conn_destroy->completion_status) {
2406 		printk(KERN_ALERT "conn_destroy_cmpl: op failed\n");
2407 		ep->state = EP_STATE_CLEANUP_FAILED;
2408 	} else
2409 		ep->state = EP_STATE_CLEANUP_CMPL;
2410 	wake_up_interruptible(&ep->ofld_wait);
2411 }
2412 
2413 
2414 /**
2415  * bnx2i_process_ofld_cmpl - process initial iscsi conn offload completion
2416  * @hba:		adapter structure pointer
2417  * @ofld_kcqe:		conn offload kcqe pointer
2418  *
2419  * handles initial connection offload completion, ep_connect() thread is
2420  *	woken-up to continue with LLP connect process
2421  */
bnx2i_process_ofld_cmpl(struct bnx2i_hba * hba,struct iscsi_kcqe * ofld_kcqe)2422 static void bnx2i_process_ofld_cmpl(struct bnx2i_hba *hba,
2423 				    struct iscsi_kcqe *ofld_kcqe)
2424 {
2425 	u32 cid_addr;
2426 	struct bnx2i_endpoint *ep;
2427 
2428 	ep = bnx2i_find_ep_in_ofld_list(hba, ofld_kcqe->iscsi_conn_id);
2429 	if (!ep) {
2430 		printk(KERN_ALERT "ofld_cmpl: no pend offload request\n");
2431 		return;
2432 	}
2433 
2434 	if (hba != ep->hba) {
2435 		printk(KERN_ALERT "ofld_cmpl: error hba mismatch\n");
2436 		return;
2437 	}
2438 
2439 	if (ofld_kcqe->completion_status) {
2440 		ep->state = EP_STATE_OFLD_FAILED;
2441 		if (ofld_kcqe->completion_status ==
2442 		    ISCSI_KCQE_COMPLETION_STATUS_CTX_ALLOC_FAILURE)
2443 			printk(KERN_ALERT "bnx2i (%s): ofld1 cmpl - unable "
2444 				"to allocate iSCSI context resources\n",
2445 				hba->netdev->name);
2446 		else if (ofld_kcqe->completion_status ==
2447 			 ISCSI_KCQE_COMPLETION_STATUS_INVALID_OPCODE)
2448 			printk(KERN_ALERT "bnx2i (%s): ofld1 cmpl - invalid "
2449 				"opcode\n", hba->netdev->name);
2450 		else if (ofld_kcqe->completion_status ==
2451 			 ISCSI_KCQE_COMPLETION_STATUS_CID_BUSY)
2452 			/* error status code valid only for 5771x chipset */
2453 			ep->state = EP_STATE_OFLD_FAILED_CID_BUSY;
2454 		else
2455 			printk(KERN_ALERT "bnx2i (%s): ofld1 cmpl - invalid "
2456 				"error code %d\n", hba->netdev->name,
2457 				ofld_kcqe->completion_status);
2458 	} else {
2459 		ep->state = EP_STATE_OFLD_COMPL;
2460 		cid_addr = ofld_kcqe->iscsi_conn_context_id;
2461 		ep->ep_cid = cid_addr;
2462 		ep->qp.ctx_base = NULL;
2463 	}
2464 	wake_up_interruptible(&ep->ofld_wait);
2465 }
2466 
2467 /**
2468  * bnx2i_indicate_kcqe - process iscsi conn update completion KCQE
2469  * @context:		adapter structure pointer
2470  * @kcqe:		kcqe pointer
2471  * @num_cqe:		number of kcqes to process
2472  *
2473  * Generic KCQ event handler/dispatcher
2474  */
bnx2i_indicate_kcqe(void * context,struct kcqe * kcqe[],u32 num_cqe)2475 static void bnx2i_indicate_kcqe(void *context, struct kcqe *kcqe[],
2476 				u32 num_cqe)
2477 {
2478 	struct bnx2i_hba *hba = context;
2479 	int i = 0;
2480 	struct iscsi_kcqe *ikcqe = NULL;
2481 
2482 	while (i < num_cqe) {
2483 		ikcqe = (struct iscsi_kcqe *) kcqe[i++];
2484 
2485 		if (ikcqe->op_code ==
2486 		    ISCSI_KCQE_OPCODE_CQ_EVENT_NOTIFICATION)
2487 			bnx2i_fastpath_notification(hba, ikcqe);
2488 		else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_OFFLOAD_CONN)
2489 			bnx2i_process_ofld_cmpl(hba, ikcqe);
2490 		else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_UPDATE_CONN)
2491 			bnx2i_process_update_conn_cmpl(hba, ikcqe);
2492 		else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_INIT) {
2493 			if (ikcqe->completion_status !=
2494 			    ISCSI_KCQE_COMPLETION_STATUS_SUCCESS)
2495 				bnx2i_iscsi_license_error(hba, ikcqe->\
2496 							  completion_status);
2497 			else {
2498 				set_bit(ADAPTER_STATE_UP, &hba->adapter_state);
2499 				bnx2i_get_link_state(hba);
2500 				printk(KERN_INFO "bnx2i [%.2x:%.2x.%.2x]: "
2501 						 "ISCSI_INIT passed\n",
2502 						 (u8)hba->pcidev->bus->number,
2503 						 hba->pci_devno,
2504 						 (u8)hba->pci_func);
2505 
2506 
2507 			}
2508 		} else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_DESTROY_CONN)
2509 			bnx2i_process_conn_destroy_cmpl(hba, ikcqe);
2510 		else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_ISCSI_ERROR)
2511 			bnx2i_process_iscsi_error(hba, ikcqe);
2512 		else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_TCP_ERROR)
2513 			bnx2i_process_tcp_error(hba, ikcqe);
2514 		else
2515 			printk(KERN_ALERT "bnx2i: unknown opcode 0x%x\n",
2516 					  ikcqe->op_code);
2517 	}
2518 }
2519 
2520 
2521 /**
2522  * bnx2i_indicate_netevent - Generic netdev event handler
2523  * @context:	adapter structure pointer
2524  * @event:	event type
2525  * @vlan_id:	vlans id - associated vlan id with this event
2526  *
2527  * Handles four netdev events, NETDEV_UP, NETDEV_DOWN,
2528  *	NETDEV_GOING_DOWN and NETDEV_CHANGE
2529  */
bnx2i_indicate_netevent(void * context,unsigned long event,u16 vlan_id)2530 static void bnx2i_indicate_netevent(void *context, unsigned long event,
2531 				    u16 vlan_id)
2532 {
2533 	struct bnx2i_hba *hba = context;
2534 
2535 	/* Ignore all netevent coming from vlans */
2536 	if (vlan_id != 0)
2537 		return;
2538 
2539 	switch (event) {
2540 	case NETDEV_UP:
2541 		if (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state))
2542 			bnx2i_send_fw_iscsi_init_msg(hba);
2543 		break;
2544 	case NETDEV_DOWN:
2545 		clear_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state);
2546 		clear_bit(ADAPTER_STATE_UP, &hba->adapter_state);
2547 		break;
2548 	case NETDEV_GOING_DOWN:
2549 		set_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state);
2550 		iscsi_host_for_each_session(hba->shost,
2551 					    bnx2i_drop_session);
2552 		break;
2553 	case NETDEV_CHANGE:
2554 		bnx2i_get_link_state(hba);
2555 		break;
2556 	default:
2557 		;
2558 	}
2559 }
2560 
2561 
2562 /**
2563  * bnx2i_cm_connect_cmpl - process iscsi conn establishment completion
2564  * @cm_sk: 		cnic sock structure pointer
2565  *
2566  * function callback exported via bnx2i - cnic driver interface to
2567  *	indicate completion of option-2 TCP connect request.
2568  */
bnx2i_cm_connect_cmpl(struct cnic_sock * cm_sk)2569 static void bnx2i_cm_connect_cmpl(struct cnic_sock *cm_sk)
2570 {
2571 	struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2572 
2573 	if (test_bit(ADAPTER_STATE_GOING_DOWN, &ep->hba->adapter_state))
2574 		ep->state = EP_STATE_CONNECT_FAILED;
2575 	else if (test_bit(SK_F_OFFLD_COMPLETE, &cm_sk->flags))
2576 		ep->state = EP_STATE_CONNECT_COMPL;
2577 	else
2578 		ep->state = EP_STATE_CONNECT_FAILED;
2579 
2580 	wake_up_interruptible(&ep->ofld_wait);
2581 }
2582 
2583 
2584 /**
2585  * bnx2i_cm_close_cmpl - process tcp conn close completion
2586  * @cm_sk:	cnic sock structure pointer
2587  *
2588  * function callback exported via bnx2i - cnic driver interface to
2589  *	indicate completion of option-2 graceful TCP connect shutdown
2590  */
bnx2i_cm_close_cmpl(struct cnic_sock * cm_sk)2591 static void bnx2i_cm_close_cmpl(struct cnic_sock *cm_sk)
2592 {
2593 	struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2594 
2595 	ep->state = EP_STATE_DISCONN_COMPL;
2596 	wake_up_interruptible(&ep->ofld_wait);
2597 }
2598 
2599 
2600 /**
2601  * bnx2i_cm_abort_cmpl - process abortive tcp conn teardown completion
2602  * @cm_sk:	cnic sock structure pointer
2603  *
2604  * function callback exported via bnx2i - cnic driver interface to
2605  *	indicate completion of option-2 abortive TCP connect termination
2606  */
bnx2i_cm_abort_cmpl(struct cnic_sock * cm_sk)2607 static void bnx2i_cm_abort_cmpl(struct cnic_sock *cm_sk)
2608 {
2609 	struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2610 
2611 	ep->state = EP_STATE_DISCONN_COMPL;
2612 	wake_up_interruptible(&ep->ofld_wait);
2613 }
2614 
2615 
2616 /**
2617  * bnx2i_cm_remote_close - process received TCP FIN
2618  * @cm_sk:	cnic sock structure pointer
2619  *
2620  * function callback exported via bnx2i - cnic driver interface to indicate
2621  *	async TCP events such as FIN
2622  */
bnx2i_cm_remote_close(struct cnic_sock * cm_sk)2623 static void bnx2i_cm_remote_close(struct cnic_sock *cm_sk)
2624 {
2625 	struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2626 
2627 	ep->state = EP_STATE_TCP_FIN_RCVD;
2628 	if (ep->conn)
2629 		bnx2i_recovery_que_add_conn(ep->hba, ep->conn);
2630 }
2631 
2632 /**
2633  * bnx2i_cm_remote_abort - process TCP RST and start conn cleanup
2634  * @cm_sk:	cnic sock structure pointer
2635  *
2636  * function callback exported via bnx2i - cnic driver interface to
2637  *	indicate async TCP events (RST) sent by the peer.
2638  */
bnx2i_cm_remote_abort(struct cnic_sock * cm_sk)2639 static void bnx2i_cm_remote_abort(struct cnic_sock *cm_sk)
2640 {
2641 	struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2642 	u32 old_state = ep->state;
2643 
2644 	ep->state = EP_STATE_TCP_RST_RCVD;
2645 	if (old_state == EP_STATE_DISCONN_START)
2646 		wake_up_interruptible(&ep->ofld_wait);
2647 	else
2648 		if (ep->conn)
2649 			bnx2i_recovery_que_add_conn(ep->hba, ep->conn);
2650 }
2651 
2652 
bnx2i_send_nl_mesg(void * context,u32 msg_type,char * buf,u16 buflen)2653 static int bnx2i_send_nl_mesg(void *context, u32 msg_type,
2654 			      char *buf, u16 buflen)
2655 {
2656 	struct bnx2i_hba *hba = context;
2657 	int rc;
2658 
2659 	if (!hba)
2660 		return -ENODEV;
2661 
2662 	rc = iscsi_offload_mesg(hba->shost, &bnx2i_iscsi_transport,
2663 				msg_type, buf, buflen);
2664 	if (rc)
2665 		printk(KERN_ALERT "bnx2i: private nl message send error\n");
2666 
2667 	return rc;
2668 }
2669 
2670 
2671 /*
2672  * bnx2i_cnic_cb - global template of bnx2i - cnic driver interface structure
2673  *			carrying callback function pointers
2674  */
2675 struct cnic_ulp_ops bnx2i_cnic_cb = {
2676 	.cnic_init = bnx2i_ulp_init,
2677 	.cnic_exit = bnx2i_ulp_exit,
2678 	.cnic_start = bnx2i_start,
2679 	.cnic_stop = bnx2i_stop,
2680 	.indicate_kcqes = bnx2i_indicate_kcqe,
2681 	.indicate_netevent = bnx2i_indicate_netevent,
2682 	.cm_connect_complete = bnx2i_cm_connect_cmpl,
2683 	.cm_close_complete = bnx2i_cm_close_cmpl,
2684 	.cm_abort_complete = bnx2i_cm_abort_cmpl,
2685 	.cm_remote_close = bnx2i_cm_remote_close,
2686 	.cm_remote_abort = bnx2i_cm_remote_abort,
2687 	.iscsi_nl_send_msg = bnx2i_send_nl_mesg,
2688 	.cnic_get_stats = bnx2i_get_stats,
2689 	.owner = THIS_MODULE
2690 };
2691 
2692 
2693 /**
2694  * bnx2i_map_ep_dbell_regs - map connection doorbell registers
2695  * @ep: bnx2i endpoint
2696  *
2697  * maps connection's SQ and RQ doorbell registers, 5706/5708/5709 hosts these
2698  *	register in BAR #0. Whereas in 57710 these register are accessed by
2699  *	mapping BAR #1
2700  */
bnx2i_map_ep_dbell_regs(struct bnx2i_endpoint * ep)2701 int bnx2i_map_ep_dbell_regs(struct bnx2i_endpoint *ep)
2702 {
2703 	u32 cid_num;
2704 	u32 reg_off;
2705 	u32 first_l4l5;
2706 	u32 ctx_sz;
2707 	u32 config2;
2708 	resource_size_t reg_base;
2709 
2710 	cid_num = bnx2i_get_cid_num(ep);
2711 
2712 	if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
2713 		reg_base = pci_resource_start(ep->hba->pcidev,
2714 					      BNX2X_DOORBELL_PCI_BAR);
2715 		reg_off = (1 << BNX2X_DB_SHIFT) * (cid_num & 0x1FFFF);
2716 		ep->qp.ctx_base = ioremap(reg_base + reg_off, 4);
2717 		if (!ep->qp.ctx_base)
2718 			return -ENOMEM;
2719 		goto arm_cq;
2720 	}
2721 
2722 	if ((test_bit(BNX2I_NX2_DEV_5709, &ep->hba->cnic_dev_type)) &&
2723 	    (ep->hba->mail_queue_access == BNX2I_MQ_BIN_MODE)) {
2724 		config2 = REG_RD(ep->hba, BNX2_MQ_CONFIG2);
2725 		first_l4l5 = config2 & BNX2_MQ_CONFIG2_FIRST_L4L5;
2726 		ctx_sz = (config2 & BNX2_MQ_CONFIG2_CONT_SZ) >> 3;
2727 		if (ctx_sz)
2728 			reg_off = CTX_OFFSET + MAX_CID_CNT * MB_KERNEL_CTX_SIZE
2729 				  + BNX2I_570X_PAGE_SIZE_DEFAULT *
2730 				  (((cid_num - first_l4l5) / ctx_sz) + 256);
2731 		else
2732 			reg_off = CTX_OFFSET + (MB_KERNEL_CTX_SIZE * cid_num);
2733 	} else
2734 		/* 5709 device in normal node and 5706/5708 devices */
2735 		reg_off = CTX_OFFSET + (MB_KERNEL_CTX_SIZE * cid_num);
2736 
2737 	ep->qp.ctx_base = ioremap(ep->hba->reg_base + reg_off,
2738 					  MB_KERNEL_CTX_SIZE);
2739 	if (!ep->qp.ctx_base)
2740 		return -ENOMEM;
2741 
2742 arm_cq:
2743 	bnx2i_arm_cq_event_coalescing(ep, CNIC_ARM_CQE);
2744 	return 0;
2745 }
2746