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