Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6
[linux-2.6.git] / drivers / scsi / bnx2i / bnx2i_hwi.c
1 /* bnx2i_hwi.c: Broadcom NetXtreme II iSCSI driver.
2  *
3  * Copyright (c) 2006 - 2011 Broadcom Corporation
4  * Copyright (c) 2007, 2008 Red Hat, Inc.  All rights reserved.
5  * Copyright (c) 2007, 2008 Mike Christie
6  *
7  * This program is free software; you can redistribute it and/or modify
8  * it under the terms of the GNU General Public License as published by
9  * the Free Software Foundation.
10  *
11  * Written by: Anil Veerabhadrappa (anilgv@broadcom.com)
12  * Maintained by: Eddie Wai (eddie.wai@broadcom.com)
13  */
14
15 #include <linux/gfp.h>
16 #include <scsi/scsi_tcq.h>
17 #include <scsi/libiscsi.h>
18 #include "bnx2i.h"
19
20 DECLARE_PER_CPU(struct bnx2i_percpu_s, bnx2i_percpu);
21
22 /**
23  * bnx2i_get_cid_num - get cid from ep
24  * @ep:         endpoint pointer
25  *
26  * Only applicable to 57710 family of devices
27  */
28 static u32 bnx2i_get_cid_num(struct bnx2i_endpoint *ep)
29 {
30         u32 cid;
31
32         if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
33                 cid = ep->ep_cid;
34         else
35                 cid = GET_CID_NUM(ep->ep_cid);
36         return cid;
37 }
38
39
40 /**
41  * bnx2i_adjust_qp_size - Adjust SQ/RQ/CQ size for 57710 device type
42  * @hba:                Adapter for which adjustments is to be made
43  *
44  * Only applicable to 57710 family of devices
45  */
46 static void bnx2i_adjust_qp_size(struct bnx2i_hba *hba)
47 {
48         u32 num_elements_per_pg;
49
50         if (test_bit(BNX2I_NX2_DEV_5706, &hba->cnic_dev_type) ||
51             test_bit(BNX2I_NX2_DEV_5708, &hba->cnic_dev_type) ||
52             test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type)) {
53                 if (!is_power_of_2(hba->max_sqes))
54                         hba->max_sqes = rounddown_pow_of_two(hba->max_sqes);
55
56                 if (!is_power_of_2(hba->max_rqes))
57                         hba->max_rqes = rounddown_pow_of_two(hba->max_rqes);
58         }
59
60         /* Adjust each queue size if the user selection does not
61          * yield integral num of page buffers
62          */
63         /* adjust SQ */
64         num_elements_per_pg = PAGE_SIZE / BNX2I_SQ_WQE_SIZE;
65         if (hba->max_sqes < num_elements_per_pg)
66                 hba->max_sqes = num_elements_per_pg;
67         else if (hba->max_sqes % num_elements_per_pg)
68                 hba->max_sqes = (hba->max_sqes + num_elements_per_pg - 1) &
69                                  ~(num_elements_per_pg - 1);
70
71         /* adjust CQ */
72         num_elements_per_pg = PAGE_SIZE / BNX2I_CQE_SIZE;
73         if (hba->max_cqes < num_elements_per_pg)
74                 hba->max_cqes = num_elements_per_pg;
75         else if (hba->max_cqes % num_elements_per_pg)
76                 hba->max_cqes = (hba->max_cqes + num_elements_per_pg - 1) &
77                                  ~(num_elements_per_pg - 1);
78
79         /* adjust RQ */
80         num_elements_per_pg = PAGE_SIZE / BNX2I_RQ_WQE_SIZE;
81         if (hba->max_rqes < num_elements_per_pg)
82                 hba->max_rqes = num_elements_per_pg;
83         else if (hba->max_rqes % num_elements_per_pg)
84                 hba->max_rqes = (hba->max_rqes + num_elements_per_pg - 1) &
85                                  ~(num_elements_per_pg - 1);
86 }
87
88
89 /**
90  * bnx2i_get_link_state - get network interface link state
91  * @hba:        adapter instance pointer
92  *
93  * updates adapter structure flag based on netdev state
94  */
95 static void bnx2i_get_link_state(struct bnx2i_hba *hba)
96 {
97         if (test_bit(__LINK_STATE_NOCARRIER, &hba->netdev->state))
98                 set_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state);
99         else
100                 clear_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state);
101 }
102
103
104 /**
105  * bnx2i_iscsi_license_error - displays iscsi license related error message
106  * @hba:                adapter instance pointer
107  * @error_code:         error classification
108  *
109  * Puts out an error log when driver is unable to offload iscsi connection
110  *      due to license restrictions
111  */
112 static void bnx2i_iscsi_license_error(struct bnx2i_hba *hba, u32 error_code)
113 {
114         if (error_code == ISCSI_KCQE_COMPLETION_STATUS_ISCSI_NOT_SUPPORTED)
115                 /* iSCSI offload not supported on this device */
116                 printk(KERN_ERR "bnx2i: iSCSI not supported, dev=%s\n",
117                                 hba->netdev->name);
118         if (error_code == ISCSI_KCQE_COMPLETION_STATUS_LOM_ISCSI_NOT_ENABLED)
119                 /* iSCSI offload not supported on this LOM device */
120                 printk(KERN_ERR "bnx2i: LOM is not enable to "
121                                 "offload iSCSI connections, dev=%s\n",
122                                 hba->netdev->name);
123         set_bit(ADAPTER_STATE_INIT_FAILED, &hba->adapter_state);
124 }
125
126
127 /**
128  * bnx2i_arm_cq_event_coalescing - arms CQ to enable EQ notification
129  * @ep:         endpoint (transport indentifier) structure
130  * @action:     action, ARM or DISARM. For now only ARM_CQE is used
131  *
132  * Arm'ing CQ will enable chip to generate global EQ events inorder to interrupt
133  *      the driver. EQ event is generated CQ index is hit or at least 1 CQ is
134  *      outstanding and on chip timer expires
135  */
136 int bnx2i_arm_cq_event_coalescing(struct bnx2i_endpoint *ep, u8 action)
137 {
138         struct bnx2i_5771x_cq_db *cq_db;
139         u16 cq_index;
140         u16 next_index = 0;
141         u32 num_active_cmds;
142
143         /* Coalesce CQ entries only on 10G devices */
144         if (!test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
145                 return 0;
146
147         /* Do not update CQ DB multiple times before firmware writes
148          * '0xFFFF' to CQDB->SQN field. Deviation may cause spurious
149          * interrupts and other unwanted results
150          */
151         cq_db = (struct bnx2i_5771x_cq_db *) ep->qp.cq_pgtbl_virt;
152
153         if (action != CNIC_ARM_CQE_FP)
154                 if (cq_db->sqn[0] && cq_db->sqn[0] != 0xFFFF)
155                         return 0;
156
157         if (action == CNIC_ARM_CQE || action == CNIC_ARM_CQE_FP) {
158                 num_active_cmds = atomic_read(&ep->num_active_cmds);
159                 if (num_active_cmds <= event_coal_min)
160                         next_index = 1;
161                 else {
162                         next_index = num_active_cmds >> ep->ec_shift;
163                         if (next_index > num_active_cmds - event_coal_min)
164                                 next_index = num_active_cmds - event_coal_min;
165                 }
166                 if (!next_index)
167                         next_index = 1;
168                 cq_index = ep->qp.cqe_exp_seq_sn + next_index - 1;
169                 if (cq_index > ep->qp.cqe_size * 2)
170                         cq_index -= ep->qp.cqe_size * 2;
171                 if (!cq_index)
172                         cq_index = 1;
173
174                 cq_db->sqn[0] = cq_index;
175         }
176         return next_index;
177 }
178
179
180 /**
181  * bnx2i_get_rq_buf - copy RQ buffer contents to driver buffer
182  * @conn:               iscsi connection on which RQ event occurred
183  * @ptr:                driver buffer to which RQ buffer contents is to
184  *                      be copied
185  * @len:                length of valid data inside RQ buf
186  *
187  * Copies RQ buffer contents from shared (DMA'able) memory region to
188  *      driver buffer. RQ is used to DMA unsolicitated iscsi pdu's and
189  *      scsi sense info
190  */
191 void bnx2i_get_rq_buf(struct bnx2i_conn *bnx2i_conn, char *ptr, int len)
192 {
193         if (!bnx2i_conn->ep->qp.rqe_left)
194                 return;
195
196         bnx2i_conn->ep->qp.rqe_left--;
197         memcpy(ptr, (u8 *) bnx2i_conn->ep->qp.rq_cons_qe, len);
198         if (bnx2i_conn->ep->qp.rq_cons_qe == bnx2i_conn->ep->qp.rq_last_qe) {
199                 bnx2i_conn->ep->qp.rq_cons_qe = bnx2i_conn->ep->qp.rq_first_qe;
200                 bnx2i_conn->ep->qp.rq_cons_idx = 0;
201         } else {
202                 bnx2i_conn->ep->qp.rq_cons_qe++;
203                 bnx2i_conn->ep->qp.rq_cons_idx++;
204         }
205 }
206
207
208 static void bnx2i_ring_577xx_doorbell(struct bnx2i_conn *conn)
209 {
210         struct bnx2i_5771x_dbell dbell;
211         u32 msg;
212
213         memset(&dbell, 0, sizeof(dbell));
214         dbell.dbell.header = (B577XX_ISCSI_CONNECTION_TYPE <<
215                               B577XX_DOORBELL_HDR_CONN_TYPE_SHIFT);
216         msg = *((u32 *)&dbell);
217         /* TODO : get doorbell register mapping */
218         writel(cpu_to_le32(msg), conn->ep->qp.ctx_base);
219 }
220
221
222 /**
223  * bnx2i_put_rq_buf - Replenish RQ buffer, if required ring on chip doorbell
224  * @conn:       iscsi connection on which event to post
225  * @count:      number of RQ buffer being posted to chip
226  *
227  * No need to ring hardware doorbell for 57710 family of devices
228  */
229 void bnx2i_put_rq_buf(struct bnx2i_conn *bnx2i_conn, int count)
230 {
231         struct bnx2i_5771x_sq_rq_db *rq_db;
232         u16 hi_bit = (bnx2i_conn->ep->qp.rq_prod_idx & 0x8000);
233         struct bnx2i_endpoint *ep = bnx2i_conn->ep;
234
235         ep->qp.rqe_left += count;
236         ep->qp.rq_prod_idx &= 0x7FFF;
237         ep->qp.rq_prod_idx += count;
238
239         if (ep->qp.rq_prod_idx > bnx2i_conn->hba->max_rqes) {
240                 ep->qp.rq_prod_idx %= bnx2i_conn->hba->max_rqes;
241                 if (!hi_bit)
242                         ep->qp.rq_prod_idx |= 0x8000;
243         } else
244                 ep->qp.rq_prod_idx |= hi_bit;
245
246         if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
247                 rq_db = (struct bnx2i_5771x_sq_rq_db *) ep->qp.rq_pgtbl_virt;
248                 rq_db->prod_idx = ep->qp.rq_prod_idx;
249                 /* no need to ring hardware doorbell for 57710 */
250         } else {
251                 writew(ep->qp.rq_prod_idx,
252                        ep->qp.ctx_base + CNIC_RECV_DOORBELL);
253         }
254         mmiowb();
255 }
256
257
258 /**
259  * bnx2i_ring_sq_dbell - Ring SQ doorbell to wake-up the processing engine
260  * @conn:               iscsi connection to which new SQ entries belong
261  * @count:              number of SQ WQEs to post
262  *
263  * SQ DB is updated in host memory and TX Doorbell is rung for 57710 family
264  *      of devices. For 5706/5708/5709 new SQ WQE count is written into the
265  *      doorbell register
266  */
267 static void bnx2i_ring_sq_dbell(struct bnx2i_conn *bnx2i_conn, int count)
268 {
269         struct bnx2i_5771x_sq_rq_db *sq_db;
270         struct bnx2i_endpoint *ep = bnx2i_conn->ep;
271
272         atomic_inc(&ep->num_active_cmds);
273         wmb();  /* flush SQ WQE memory before the doorbell is rung */
274         if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
275                 sq_db = (struct bnx2i_5771x_sq_rq_db *) ep->qp.sq_pgtbl_virt;
276                 sq_db->prod_idx = ep->qp.sq_prod_idx;
277                 bnx2i_ring_577xx_doorbell(bnx2i_conn);
278         } else
279                 writew(count, ep->qp.ctx_base + CNIC_SEND_DOORBELL);
280
281         mmiowb(); /* flush posted PCI writes */
282 }
283
284
285 /**
286  * bnx2i_ring_dbell_update_sq_params - update SQ driver parameters
287  * @conn:       iscsi connection to which new SQ entries belong
288  * @count:      number of SQ WQEs to post
289  *
290  * this routine will update SQ driver parameters and ring the doorbell
291  */
292 static void bnx2i_ring_dbell_update_sq_params(struct bnx2i_conn *bnx2i_conn,
293                                               int count)
294 {
295         int tmp_cnt;
296
297         if (count == 1) {
298                 if (bnx2i_conn->ep->qp.sq_prod_qe ==
299                     bnx2i_conn->ep->qp.sq_last_qe)
300                         bnx2i_conn->ep->qp.sq_prod_qe =
301                                                 bnx2i_conn->ep->qp.sq_first_qe;
302                 else
303                         bnx2i_conn->ep->qp.sq_prod_qe++;
304         } else {
305                 if ((bnx2i_conn->ep->qp.sq_prod_qe + count) <=
306                     bnx2i_conn->ep->qp.sq_last_qe)
307                         bnx2i_conn->ep->qp.sq_prod_qe += count;
308                 else {
309                         tmp_cnt = bnx2i_conn->ep->qp.sq_last_qe -
310                                 bnx2i_conn->ep->qp.sq_prod_qe;
311                         bnx2i_conn->ep->qp.sq_prod_qe =
312                                 &bnx2i_conn->ep->qp.sq_first_qe[count -
313                                                                 (tmp_cnt + 1)];
314                 }
315         }
316         bnx2i_conn->ep->qp.sq_prod_idx += count;
317         /* Ring the doorbell */
318         bnx2i_ring_sq_dbell(bnx2i_conn, bnx2i_conn->ep->qp.sq_prod_idx);
319 }
320
321
322 /**
323  * bnx2i_send_iscsi_login - post iSCSI login request MP WQE to hardware
324  * @conn:       iscsi connection
325  * @cmd:        driver command structure which is requesting
326  *              a WQE to sent to chip for further processing
327  *
328  * prepare and post an iSCSI Login request WQE to CNIC firmware
329  */
330 int bnx2i_send_iscsi_login(struct bnx2i_conn *bnx2i_conn,
331                            struct iscsi_task *task)
332 {
333         struct bnx2i_cmd *bnx2i_cmd;
334         struct bnx2i_login_request *login_wqe;
335         struct iscsi_login *login_hdr;
336         u32 dword;
337
338         bnx2i_cmd = (struct bnx2i_cmd *)task->dd_data;
339         login_hdr = (struct iscsi_login *)task->hdr;
340         login_wqe = (struct bnx2i_login_request *)
341                                                 bnx2i_conn->ep->qp.sq_prod_qe;
342
343         login_wqe->op_code = login_hdr->opcode;
344         login_wqe->op_attr = login_hdr->flags;
345         login_wqe->version_max = login_hdr->max_version;
346         login_wqe->version_min = login_hdr->min_version;
347         login_wqe->data_length = ntoh24(login_hdr->dlength);
348         login_wqe->isid_lo = *((u32 *) login_hdr->isid);
349         login_wqe->isid_hi = *((u16 *) login_hdr->isid + 2);
350         login_wqe->tsih = login_hdr->tsih;
351         login_wqe->itt = task->itt |
352                 (ISCSI_TASK_TYPE_MPATH << ISCSI_LOGIN_REQUEST_TYPE_SHIFT);
353         login_wqe->cid = login_hdr->cid;
354
355         login_wqe->cmd_sn = be32_to_cpu(login_hdr->cmdsn);
356         login_wqe->exp_stat_sn = be32_to_cpu(login_hdr->exp_statsn);
357         login_wqe->flags = ISCSI_LOGIN_REQUEST_UPDATE_EXP_STAT_SN;
358
359         login_wqe->resp_bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_bd_dma;
360         login_wqe->resp_bd_list_addr_hi =
361                 (u32) ((u64) bnx2i_conn->gen_pdu.resp_bd_dma >> 32);
362
363         dword = ((1 << ISCSI_LOGIN_REQUEST_NUM_RESP_BDS_SHIFT) |
364                  (bnx2i_conn->gen_pdu.resp_buf_size <<
365                   ISCSI_LOGIN_REQUEST_RESP_BUFFER_LENGTH_SHIFT));
366         login_wqe->resp_buffer = dword;
367         login_wqe->bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.req_bd_dma;
368         login_wqe->bd_list_addr_hi =
369                 (u32) ((u64) bnx2i_conn->gen_pdu.req_bd_dma >> 32);
370         login_wqe->num_bds = 1;
371         login_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
372
373         bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
374         return 0;
375 }
376
377 /**
378  * bnx2i_send_iscsi_tmf - post iSCSI task management request MP WQE to hardware
379  * @conn:       iscsi connection
380  * @mtask:      driver command structure which is requesting
381  *              a WQE to sent to chip for further processing
382  *
383  * prepare and post an iSCSI Login request WQE to CNIC firmware
384  */
385 int bnx2i_send_iscsi_tmf(struct bnx2i_conn *bnx2i_conn,
386                          struct iscsi_task *mtask)
387 {
388         struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
389         struct iscsi_tm *tmfabort_hdr;
390         struct scsi_cmnd *ref_sc;
391         struct iscsi_task *ctask;
392         struct bnx2i_cmd *bnx2i_cmd;
393         struct bnx2i_tmf_request *tmfabort_wqe;
394         u32 dword;
395         u32 scsi_lun[2];
396
397         bnx2i_cmd = (struct bnx2i_cmd *)mtask->dd_data;
398         tmfabort_hdr = (struct iscsi_tm *)mtask->hdr;
399         tmfabort_wqe = (struct bnx2i_tmf_request *)
400                                                 bnx2i_conn->ep->qp.sq_prod_qe;
401
402         tmfabort_wqe->op_code = tmfabort_hdr->opcode;
403         tmfabort_wqe->op_attr = tmfabort_hdr->flags;
404
405         tmfabort_wqe->itt = (mtask->itt | (ISCSI_TASK_TYPE_MPATH << 14));
406         tmfabort_wqe->reserved2 = 0;
407         tmfabort_wqe->cmd_sn = be32_to_cpu(tmfabort_hdr->cmdsn);
408
409         switch (tmfabort_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) {
410         case ISCSI_TM_FUNC_ABORT_TASK:
411         case ISCSI_TM_FUNC_TASK_REASSIGN:
412                 ctask = iscsi_itt_to_task(conn, tmfabort_hdr->rtt);
413                 if (!ctask || !ctask->sc)
414                         /*
415                          * the iscsi layer must have completed the cmd while
416                          * was starting up.
417                          *
418                          * Note: In the case of a SCSI cmd timeout, the task's
419                          *       sc is still active; hence ctask->sc != 0
420                          *       In this case, the task must be aborted
421                          */
422                         return 0;
423
424                 ref_sc = ctask->sc;
425                 if (ref_sc->sc_data_direction == DMA_TO_DEVICE)
426                         dword = (ISCSI_TASK_TYPE_WRITE <<
427                                  ISCSI_CMD_REQUEST_TYPE_SHIFT);
428                 else
429                         dword = (ISCSI_TASK_TYPE_READ <<
430                                  ISCSI_CMD_REQUEST_TYPE_SHIFT);
431                 tmfabort_wqe->ref_itt = (dword |
432                                         (tmfabort_hdr->rtt & ISCSI_ITT_MASK));
433                 break;
434         default:
435                 tmfabort_wqe->ref_itt = RESERVED_ITT;
436         }
437         memcpy(scsi_lun, &tmfabort_hdr->lun, sizeof(struct scsi_lun));
438         tmfabort_wqe->lun[0] = be32_to_cpu(scsi_lun[0]);
439         tmfabort_wqe->lun[1] = be32_to_cpu(scsi_lun[1]);
440
441         tmfabort_wqe->ref_cmd_sn = be32_to_cpu(tmfabort_hdr->refcmdsn);
442
443         tmfabort_wqe->bd_list_addr_lo = (u32) bnx2i_conn->hba->mp_bd_dma;
444         tmfabort_wqe->bd_list_addr_hi = (u32)
445                                 ((u64) bnx2i_conn->hba->mp_bd_dma >> 32);
446         tmfabort_wqe->num_bds = 1;
447         tmfabort_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
448
449         bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
450         return 0;
451 }
452
453 /**
454  * bnx2i_send_iscsi_text - post iSCSI text WQE to hardware
455  * @conn:       iscsi connection
456  * @mtask:      driver command structure which is requesting
457  *              a WQE to sent to chip for further processing
458  *
459  * prepare and post an iSCSI Text request WQE to CNIC firmware
460  */
461 int bnx2i_send_iscsi_text(struct bnx2i_conn *bnx2i_conn,
462                           struct iscsi_task *mtask)
463 {
464         struct bnx2i_cmd *bnx2i_cmd;
465         struct bnx2i_text_request *text_wqe;
466         struct iscsi_text *text_hdr;
467         u32 dword;
468
469         bnx2i_cmd = (struct bnx2i_cmd *)mtask->dd_data;
470         text_hdr = (struct iscsi_text *)mtask->hdr;
471         text_wqe = (struct bnx2i_text_request *) bnx2i_conn->ep->qp.sq_prod_qe;
472
473         memset(text_wqe, 0, sizeof(struct bnx2i_text_request));
474
475         text_wqe->op_code = text_hdr->opcode;
476         text_wqe->op_attr = text_hdr->flags;
477         text_wqe->data_length = ntoh24(text_hdr->dlength);
478         text_wqe->itt = mtask->itt |
479                 (ISCSI_TASK_TYPE_MPATH << ISCSI_TEXT_REQUEST_TYPE_SHIFT);
480         text_wqe->ttt = be32_to_cpu(text_hdr->ttt);
481
482         text_wqe->cmd_sn = be32_to_cpu(text_hdr->cmdsn);
483
484         text_wqe->resp_bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_bd_dma;
485         text_wqe->resp_bd_list_addr_hi =
486                         (u32) ((u64) bnx2i_conn->gen_pdu.resp_bd_dma >> 32);
487
488         dword = ((1 << ISCSI_TEXT_REQUEST_NUM_RESP_BDS_SHIFT) |
489                  (bnx2i_conn->gen_pdu.resp_buf_size <<
490                   ISCSI_TEXT_REQUEST_RESP_BUFFER_LENGTH_SHIFT));
491         text_wqe->resp_buffer = dword;
492         text_wqe->bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.req_bd_dma;
493         text_wqe->bd_list_addr_hi =
494                         (u32) ((u64) bnx2i_conn->gen_pdu.req_bd_dma >> 32);
495         text_wqe->num_bds = 1;
496         text_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
497
498         bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
499         return 0;
500 }
501
502
503 /**
504  * bnx2i_send_iscsi_scsicmd - post iSCSI scsicmd request WQE to hardware
505  * @conn:       iscsi connection
506  * @cmd:        driver command structure which is requesting
507  *              a WQE to sent to chip for further processing
508  *
509  * prepare and post an iSCSI SCSI-CMD request WQE to CNIC firmware
510  */
511 int bnx2i_send_iscsi_scsicmd(struct bnx2i_conn *bnx2i_conn,
512                              struct bnx2i_cmd *cmd)
513 {
514         struct bnx2i_cmd_request *scsi_cmd_wqe;
515
516         scsi_cmd_wqe = (struct bnx2i_cmd_request *)
517                                                 bnx2i_conn->ep->qp.sq_prod_qe;
518         memcpy(scsi_cmd_wqe, &cmd->req, sizeof(struct bnx2i_cmd_request));
519         scsi_cmd_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
520
521         bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
522         return 0;
523 }
524
525 /**
526  * bnx2i_send_iscsi_nopout - post iSCSI NOPOUT request WQE to hardware
527  * @conn:               iscsi connection
528  * @cmd:                driver command structure which is requesting
529  *                      a WQE to sent to chip for further processing
530  * @datap:              payload buffer pointer
531  * @data_len:           payload data length
532  * @unsol:              indicated whether nopout pdu is unsolicited pdu or
533  *                      in response to target's NOPIN w/ TTT != FFFFFFFF
534  *
535  * prepare and post a nopout request WQE to CNIC firmware
536  */
537 int bnx2i_send_iscsi_nopout(struct bnx2i_conn *bnx2i_conn,
538                             struct iscsi_task *task,
539                             char *datap, int data_len, int unsol)
540 {
541         struct bnx2i_endpoint *ep = bnx2i_conn->ep;
542         struct bnx2i_cmd *bnx2i_cmd;
543         struct bnx2i_nop_out_request *nopout_wqe;
544         struct iscsi_nopout *nopout_hdr;
545
546         bnx2i_cmd = (struct bnx2i_cmd *)task->dd_data;
547         nopout_hdr = (struct iscsi_nopout *)task->hdr;
548         nopout_wqe = (struct bnx2i_nop_out_request *)ep->qp.sq_prod_qe;
549
550         memset(nopout_wqe, 0x00, sizeof(struct bnx2i_nop_out_request));
551
552         nopout_wqe->op_code = nopout_hdr->opcode;
553         nopout_wqe->op_attr = ISCSI_FLAG_CMD_FINAL;
554         memcpy(nopout_wqe->lun, &nopout_hdr->lun, 8);
555
556         if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
557                 u32 tmp = nopout_wqe->lun[0];
558                 /* 57710 requires LUN field to be swapped */
559                 nopout_wqe->lun[0] = nopout_wqe->lun[1];
560                 nopout_wqe->lun[1] = tmp;
561         }
562
563         nopout_wqe->itt = ((u16)task->itt |
564                            (ISCSI_TASK_TYPE_MPATH <<
565                             ISCSI_TMF_REQUEST_TYPE_SHIFT));
566         nopout_wqe->ttt = nopout_hdr->ttt;
567         nopout_wqe->flags = 0;
568         if (!unsol)
569                 nopout_wqe->flags = ISCSI_NOP_OUT_REQUEST_LOCAL_COMPLETION;
570         else if (nopout_hdr->itt == RESERVED_ITT)
571                 nopout_wqe->flags = ISCSI_NOP_OUT_REQUEST_LOCAL_COMPLETION;
572
573         nopout_wqe->cmd_sn = be32_to_cpu(nopout_hdr->cmdsn);
574         nopout_wqe->data_length = data_len;
575         if (data_len) {
576                 /* handle payload data, not required in first release */
577                 printk(KERN_ALERT "NOPOUT: WARNING!! payload len != 0\n");
578         } else {
579                 nopout_wqe->bd_list_addr_lo = (u32)
580                                         bnx2i_conn->hba->mp_bd_dma;
581                 nopout_wqe->bd_list_addr_hi =
582                         (u32) ((u64) bnx2i_conn->hba->mp_bd_dma >> 32);
583                 nopout_wqe->num_bds = 1;
584         }
585         nopout_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
586
587         bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
588         return 0;
589 }
590
591
592 /**
593  * bnx2i_send_iscsi_logout - post iSCSI logout request WQE to hardware
594  * @conn:       iscsi connection
595  * @cmd:        driver command structure which is requesting
596  *              a WQE to sent to chip for further processing
597  *
598  * prepare and post logout request WQE to CNIC firmware
599  */
600 int bnx2i_send_iscsi_logout(struct bnx2i_conn *bnx2i_conn,
601                             struct iscsi_task *task)
602 {
603         struct bnx2i_cmd *bnx2i_cmd;
604         struct bnx2i_logout_request *logout_wqe;
605         struct iscsi_logout *logout_hdr;
606
607         bnx2i_cmd = (struct bnx2i_cmd *)task->dd_data;
608         logout_hdr = (struct iscsi_logout *)task->hdr;
609
610         logout_wqe = (struct bnx2i_logout_request *)
611                                                 bnx2i_conn->ep->qp.sq_prod_qe;
612         memset(logout_wqe, 0x00, sizeof(struct bnx2i_logout_request));
613
614         logout_wqe->op_code = logout_hdr->opcode;
615         logout_wqe->cmd_sn = be32_to_cpu(logout_hdr->cmdsn);
616         logout_wqe->op_attr =
617                         logout_hdr->flags | ISCSI_LOGOUT_REQUEST_ALWAYS_ONE;
618         logout_wqe->itt = ((u16)task->itt |
619                            (ISCSI_TASK_TYPE_MPATH <<
620                             ISCSI_LOGOUT_REQUEST_TYPE_SHIFT));
621         logout_wqe->data_length = 0;
622         logout_wqe->cid = 0;
623
624         logout_wqe->bd_list_addr_lo = (u32) bnx2i_conn->hba->mp_bd_dma;
625         logout_wqe->bd_list_addr_hi = (u32)
626                                 ((u64) bnx2i_conn->hba->mp_bd_dma >> 32);
627         logout_wqe->num_bds = 1;
628         logout_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
629
630         bnx2i_conn->ep->state = EP_STATE_LOGOUT_SENT;
631
632         bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
633         return 0;
634 }
635
636
637 /**
638  * bnx2i_update_iscsi_conn - post iSCSI logout request WQE to hardware
639  * @conn:       iscsi connection which requires iscsi parameter update
640  *
641  * sends down iSCSI Conn Update request to move iSCSI conn to FFP
642  */
643 void bnx2i_update_iscsi_conn(struct iscsi_conn *conn)
644 {
645         struct bnx2i_conn *bnx2i_conn = conn->dd_data;
646         struct bnx2i_hba *hba = bnx2i_conn->hba;
647         struct kwqe *kwqe_arr[2];
648         struct iscsi_kwqe_conn_update *update_wqe;
649         struct iscsi_kwqe_conn_update conn_update_kwqe;
650
651         update_wqe = &conn_update_kwqe;
652
653         update_wqe->hdr.op_code = ISCSI_KWQE_OPCODE_UPDATE_CONN;
654         update_wqe->hdr.flags =
655                 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
656
657         /* 5771x requires conn context id to be passed as is */
658         if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_conn->ep->hba->cnic_dev_type))
659                 update_wqe->context_id = bnx2i_conn->ep->ep_cid;
660         else
661                 update_wqe->context_id = (bnx2i_conn->ep->ep_cid >> 7);
662         update_wqe->conn_flags = 0;
663         if (conn->hdrdgst_en)
664                 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_HEADER_DIGEST;
665         if (conn->datadgst_en)
666                 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_DATA_DIGEST;
667         if (conn->session->initial_r2t_en)
668                 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_INITIAL_R2T;
669         if (conn->session->imm_data_en)
670                 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_IMMEDIATE_DATA;
671
672         update_wqe->max_send_pdu_length = conn->max_xmit_dlength;
673         update_wqe->max_recv_pdu_length = conn->max_recv_dlength;
674         update_wqe->first_burst_length = conn->session->first_burst;
675         update_wqe->max_burst_length = conn->session->max_burst;
676         update_wqe->exp_stat_sn = conn->exp_statsn;
677         update_wqe->max_outstanding_r2ts = conn->session->max_r2t;
678         update_wqe->session_error_recovery_level = conn->session->erl;
679         iscsi_conn_printk(KERN_ALERT, conn,
680                           "bnx2i: conn update - MBL 0x%x FBL 0x%x"
681                           "MRDSL_I 0x%x MRDSL_T 0x%x \n",
682                           update_wqe->max_burst_length,
683                           update_wqe->first_burst_length,
684                           update_wqe->max_recv_pdu_length,
685                           update_wqe->max_send_pdu_length);
686
687         kwqe_arr[0] = (struct kwqe *) update_wqe;
688         if (hba->cnic && hba->cnic->submit_kwqes)
689                 hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 1);
690 }
691
692
693 /**
694  * bnx2i_ep_ofld_timer - post iSCSI logout request WQE to hardware
695  * @data:       endpoint (transport handle) structure pointer
696  *
697  * routine to handle connection offload/destroy request timeout
698  */
699 void bnx2i_ep_ofld_timer(unsigned long data)
700 {
701         struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) data;
702
703         if (ep->state == EP_STATE_OFLD_START) {
704                 printk(KERN_ALERT "ofld_timer: CONN_OFLD timeout\n");
705                 ep->state = EP_STATE_OFLD_FAILED;
706         } else if (ep->state == EP_STATE_DISCONN_START) {
707                 printk(KERN_ALERT "ofld_timer: CONN_DISCON timeout\n");
708                 ep->state = EP_STATE_DISCONN_TIMEDOUT;
709         } else if (ep->state == EP_STATE_CLEANUP_START) {
710                 printk(KERN_ALERT "ofld_timer: CONN_CLEANUP timeout\n");
711                 ep->state = EP_STATE_CLEANUP_FAILED;
712         }
713
714         wake_up_interruptible(&ep->ofld_wait);
715 }
716
717
718 static int bnx2i_power_of2(u32 val)
719 {
720         u32 power = 0;
721         if (val & (val - 1))
722                 return power;
723         val--;
724         while (val) {
725                 val = val >> 1;
726                 power++;
727         }
728         return power;
729 }
730
731
732 /**
733  * bnx2i_send_cmd_cleanup_req - send iscsi cmd context clean-up request
734  * @hba:        adapter structure pointer
735  * @cmd:        driver command structure which is requesting
736  *              a WQE to sent to chip for further processing
737  *
738  * prepares and posts CONN_OFLD_REQ1/2 KWQE
739  */
740 void bnx2i_send_cmd_cleanup_req(struct bnx2i_hba *hba, struct bnx2i_cmd *cmd)
741 {
742         struct bnx2i_cleanup_request *cmd_cleanup;
743
744         cmd_cleanup =
745                 (struct bnx2i_cleanup_request *)cmd->conn->ep->qp.sq_prod_qe;
746         memset(cmd_cleanup, 0x00, sizeof(struct bnx2i_cleanup_request));
747
748         cmd_cleanup->op_code = ISCSI_OPCODE_CLEANUP_REQUEST;
749         cmd_cleanup->itt = cmd->req.itt;
750         cmd_cleanup->cq_index = 0; /* CQ# used for completion, 5771x only */
751
752         bnx2i_ring_dbell_update_sq_params(cmd->conn, 1);
753 }
754
755
756 /**
757  * bnx2i_send_conn_destroy - initiates iscsi connection teardown process
758  * @hba:        adapter structure pointer
759  * @ep:         endpoint (transport indentifier) structure
760  *
761  * this routine prepares and posts CONN_OFLD_REQ1/2 KWQE to initiate
762  *      iscsi connection context clean-up process
763  */
764 int bnx2i_send_conn_destroy(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
765 {
766         struct kwqe *kwqe_arr[2];
767         struct iscsi_kwqe_conn_destroy conn_cleanup;
768         int rc = -EINVAL;
769
770         memset(&conn_cleanup, 0x00, sizeof(struct iscsi_kwqe_conn_destroy));
771
772         conn_cleanup.hdr.op_code = ISCSI_KWQE_OPCODE_DESTROY_CONN;
773         conn_cleanup.hdr.flags =
774                 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
775         /* 5771x requires conn context id to be passed as is */
776         if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
777                 conn_cleanup.context_id = ep->ep_cid;
778         else
779                 conn_cleanup.context_id = (ep->ep_cid >> 7);
780
781         conn_cleanup.reserved0 = (u16)ep->ep_iscsi_cid;
782
783         kwqe_arr[0] = (struct kwqe *) &conn_cleanup;
784         if (hba->cnic && hba->cnic->submit_kwqes)
785                 rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 1);
786
787         return rc;
788 }
789
790
791 /**
792  * bnx2i_570x_send_conn_ofld_req - initiates iscsi conn context setup process
793  * @hba:                adapter structure pointer
794  * @ep:                 endpoint (transport indentifier) structure
795  *
796  * 5706/5708/5709 specific - prepares and posts CONN_OFLD_REQ1/2 KWQE
797  */
798 static int bnx2i_570x_send_conn_ofld_req(struct bnx2i_hba *hba,
799                                          struct bnx2i_endpoint *ep)
800 {
801         struct kwqe *kwqe_arr[2];
802         struct iscsi_kwqe_conn_offload1 ofld_req1;
803         struct iscsi_kwqe_conn_offload2 ofld_req2;
804         dma_addr_t dma_addr;
805         int num_kwqes = 2;
806         u32 *ptbl;
807         int rc = -EINVAL;
808
809         ofld_req1.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN1;
810         ofld_req1.hdr.flags =
811                 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
812
813         ofld_req1.iscsi_conn_id = (u16) ep->ep_iscsi_cid;
814
815         dma_addr = ep->qp.sq_pgtbl_phys;
816         ofld_req1.sq_page_table_addr_lo = (u32) dma_addr;
817         ofld_req1.sq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
818
819         dma_addr = ep->qp.cq_pgtbl_phys;
820         ofld_req1.cq_page_table_addr_lo = (u32) dma_addr;
821         ofld_req1.cq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
822
823         ofld_req2.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN2;
824         ofld_req2.hdr.flags =
825                 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
826
827         dma_addr = ep->qp.rq_pgtbl_phys;
828         ofld_req2.rq_page_table_addr_lo = (u32) dma_addr;
829         ofld_req2.rq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
830
831         ptbl = (u32 *) ep->qp.sq_pgtbl_virt;
832
833         ofld_req2.sq_first_pte.hi = *ptbl++;
834         ofld_req2.sq_first_pte.lo = *ptbl;
835
836         ptbl = (u32 *) ep->qp.cq_pgtbl_virt;
837         ofld_req2.cq_first_pte.hi = *ptbl++;
838         ofld_req2.cq_first_pte.lo = *ptbl;
839
840         kwqe_arr[0] = (struct kwqe *) &ofld_req1;
841         kwqe_arr[1] = (struct kwqe *) &ofld_req2;
842         ofld_req2.num_additional_wqes = 0;
843
844         if (hba->cnic && hba->cnic->submit_kwqes)
845                 rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, num_kwqes);
846
847         return rc;
848 }
849
850
851 /**
852  * bnx2i_5771x_send_conn_ofld_req - initiates iscsi connection context creation
853  * @hba:                adapter structure pointer
854  * @ep:                 endpoint (transport indentifier) structure
855  *
856  * 57710 specific - prepares and posts CONN_OFLD_REQ1/2 KWQE
857  */
858 static int bnx2i_5771x_send_conn_ofld_req(struct bnx2i_hba *hba,
859                                           struct bnx2i_endpoint *ep)
860 {
861         struct kwqe *kwqe_arr[5];
862         struct iscsi_kwqe_conn_offload1 ofld_req1;
863         struct iscsi_kwqe_conn_offload2 ofld_req2;
864         struct iscsi_kwqe_conn_offload3 ofld_req3[1];
865         dma_addr_t dma_addr;
866         int num_kwqes = 2;
867         u32 *ptbl;
868         int rc = -EINVAL;
869
870         ofld_req1.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN1;
871         ofld_req1.hdr.flags =
872                 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
873
874         ofld_req1.iscsi_conn_id = (u16) ep->ep_iscsi_cid;
875
876         dma_addr = ep->qp.sq_pgtbl_phys + ISCSI_SQ_DB_SIZE;
877         ofld_req1.sq_page_table_addr_lo = (u32) dma_addr;
878         ofld_req1.sq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
879
880         dma_addr = ep->qp.cq_pgtbl_phys + ISCSI_CQ_DB_SIZE;
881         ofld_req1.cq_page_table_addr_lo = (u32) dma_addr;
882         ofld_req1.cq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
883
884         ofld_req2.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN2;
885         ofld_req2.hdr.flags =
886                 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
887
888         dma_addr = ep->qp.rq_pgtbl_phys + ISCSI_RQ_DB_SIZE;
889         ofld_req2.rq_page_table_addr_lo = (u32) dma_addr;
890         ofld_req2.rq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
891
892         ptbl = (u32 *)((u8 *)ep->qp.sq_pgtbl_virt + ISCSI_SQ_DB_SIZE);
893         ofld_req2.sq_first_pte.hi = *ptbl++;
894         ofld_req2.sq_first_pte.lo = *ptbl;
895
896         ptbl = (u32 *)((u8 *)ep->qp.cq_pgtbl_virt + ISCSI_CQ_DB_SIZE);
897         ofld_req2.cq_first_pte.hi = *ptbl++;
898         ofld_req2.cq_first_pte.lo = *ptbl;
899
900         kwqe_arr[0] = (struct kwqe *) &ofld_req1;
901         kwqe_arr[1] = (struct kwqe *) &ofld_req2;
902
903         ofld_req2.num_additional_wqes = 1;
904         memset(ofld_req3, 0x00, sizeof(ofld_req3[0]));
905         ptbl = (u32 *)((u8 *)ep->qp.rq_pgtbl_virt + ISCSI_RQ_DB_SIZE);
906         ofld_req3[0].qp_first_pte[0].hi = *ptbl++;
907         ofld_req3[0].qp_first_pte[0].lo = *ptbl;
908
909         kwqe_arr[2] = (struct kwqe *) ofld_req3;
910         /* need if we decide to go with multiple KCQE's per conn */
911         num_kwqes += 1;
912
913         if (hba->cnic && hba->cnic->submit_kwqes)
914                 rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, num_kwqes);
915
916         return rc;
917 }
918
919 /**
920  * bnx2i_send_conn_ofld_req - initiates iscsi connection context setup process
921  *
922  * @hba:                adapter structure pointer
923  * @ep:                 endpoint (transport indentifier) structure
924  *
925  * this routine prepares and posts CONN_OFLD_REQ1/2 KWQE
926  */
927 int bnx2i_send_conn_ofld_req(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
928 {
929         int rc;
930
931         if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type))
932                 rc = bnx2i_5771x_send_conn_ofld_req(hba, ep);
933         else
934                 rc = bnx2i_570x_send_conn_ofld_req(hba, ep);
935
936         return rc;
937 }
938
939
940 /**
941  * setup_qp_page_tables - iscsi QP page table setup function
942  * @ep:         endpoint (transport indentifier) structure
943  *
944  * Sets up page tables for SQ/RQ/CQ, 1G/sec (5706/5708/5709) devices requires
945  *      64-bit address in big endian format. Whereas 10G/sec (57710) requires
946  *      PT in little endian format
947  */
948 static void setup_qp_page_tables(struct bnx2i_endpoint *ep)
949 {
950         int num_pages;
951         u32 *ptbl;
952         dma_addr_t page;
953         int cnic_dev_10g;
954
955         if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
956                 cnic_dev_10g = 1;
957         else
958                 cnic_dev_10g = 0;
959
960         /* SQ page table */
961         memset(ep->qp.sq_pgtbl_virt, 0, ep->qp.sq_pgtbl_size);
962         num_pages = ep->qp.sq_mem_size / PAGE_SIZE;
963         page = ep->qp.sq_phys;
964
965         if (cnic_dev_10g)
966                 ptbl = (u32 *)((u8 *)ep->qp.sq_pgtbl_virt + ISCSI_SQ_DB_SIZE);
967         else
968                 ptbl = (u32 *) ep->qp.sq_pgtbl_virt;
969         while (num_pages--) {
970                 if (cnic_dev_10g) {
971                         /* PTE is written in little endian format for 57710 */
972                         *ptbl = (u32) page;
973                         ptbl++;
974                         *ptbl = (u32) ((u64) page >> 32);
975                         ptbl++;
976                         page += PAGE_SIZE;
977                 } else {
978                         /* PTE is written in big endian format for
979                          * 5706/5708/5709 devices */
980                         *ptbl = (u32) ((u64) page >> 32);
981                         ptbl++;
982                         *ptbl = (u32) page;
983                         ptbl++;
984                         page += PAGE_SIZE;
985                 }
986         }
987
988         /* RQ page table */
989         memset(ep->qp.rq_pgtbl_virt, 0, ep->qp.rq_pgtbl_size);
990         num_pages = ep->qp.rq_mem_size / PAGE_SIZE;
991         page = ep->qp.rq_phys;
992
993         if (cnic_dev_10g)
994                 ptbl = (u32 *)((u8 *)ep->qp.rq_pgtbl_virt + ISCSI_RQ_DB_SIZE);
995         else
996                 ptbl = (u32 *) ep->qp.rq_pgtbl_virt;
997         while (num_pages--) {
998                 if (cnic_dev_10g) {
999                         /* PTE is written in little endian format for 57710 */
1000                         *ptbl = (u32) page;
1001                         ptbl++;
1002                         *ptbl = (u32) ((u64) page >> 32);
1003                         ptbl++;
1004                         page += PAGE_SIZE;
1005                 } else {
1006                         /* PTE is written in big endian format for
1007                          * 5706/5708/5709 devices */
1008                         *ptbl = (u32) ((u64) page >> 32);
1009                         ptbl++;
1010                         *ptbl = (u32) page;
1011                         ptbl++;
1012                         page += PAGE_SIZE;
1013                 }
1014         }
1015
1016         /* CQ page table */
1017         memset(ep->qp.cq_pgtbl_virt, 0, ep->qp.cq_pgtbl_size);
1018         num_pages = ep->qp.cq_mem_size / PAGE_SIZE;
1019         page = ep->qp.cq_phys;
1020
1021         if (cnic_dev_10g)
1022                 ptbl = (u32 *)((u8 *)ep->qp.cq_pgtbl_virt + ISCSI_CQ_DB_SIZE);
1023         else
1024                 ptbl = (u32 *) ep->qp.cq_pgtbl_virt;
1025         while (num_pages--) {
1026                 if (cnic_dev_10g) {
1027                         /* PTE is written in little endian format for 57710 */
1028                         *ptbl = (u32) page;
1029                         ptbl++;
1030                         *ptbl = (u32) ((u64) page >> 32);
1031                         ptbl++;
1032                         page += PAGE_SIZE;
1033                 } else {
1034                         /* PTE is written in big endian format for
1035                          * 5706/5708/5709 devices */
1036                         *ptbl = (u32) ((u64) page >> 32);
1037                         ptbl++;
1038                         *ptbl = (u32) page;
1039                         ptbl++;
1040                         page += PAGE_SIZE;
1041                 }
1042         }
1043 }
1044
1045
1046 /**
1047  * bnx2i_alloc_qp_resc - allocates required resources for QP.
1048  * @hba:        adapter structure pointer
1049  * @ep:         endpoint (transport indentifier) structure
1050  *
1051  * Allocate QP (transport layer for iSCSI connection) resources, DMA'able
1052  *      memory for SQ/RQ/CQ and page tables. EP structure elements such
1053  *      as producer/consumer indexes/pointers, queue sizes and page table
1054  *      contents are setup
1055  */
1056 int bnx2i_alloc_qp_resc(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
1057 {
1058         struct bnx2i_5771x_cq_db *cq_db;
1059
1060         ep->hba = hba;
1061         ep->conn = NULL;
1062         ep->ep_cid = ep->ep_iscsi_cid = ep->ep_pg_cid = 0;
1063
1064         /* Allocate page table memory for SQ which is page aligned */
1065         ep->qp.sq_mem_size = hba->max_sqes * BNX2I_SQ_WQE_SIZE;
1066         ep->qp.sq_mem_size =
1067                 (ep->qp.sq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
1068         ep->qp.sq_pgtbl_size =
1069                 (ep->qp.sq_mem_size / PAGE_SIZE) * sizeof(void *);
1070         ep->qp.sq_pgtbl_size =
1071                 (ep->qp.sq_pgtbl_size + (PAGE_SIZE - 1)) & PAGE_MASK;
1072
1073         ep->qp.sq_pgtbl_virt =
1074                 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.sq_pgtbl_size,
1075                                    &ep->qp.sq_pgtbl_phys, GFP_KERNEL);
1076         if (!ep->qp.sq_pgtbl_virt) {
1077                 printk(KERN_ALERT "bnx2i: unable to alloc SQ PT mem (%d)\n",
1078                                   ep->qp.sq_pgtbl_size);
1079                 goto mem_alloc_err;
1080         }
1081
1082         /* Allocate memory area for actual SQ element */
1083         ep->qp.sq_virt =
1084                 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.sq_mem_size,
1085                                    &ep->qp.sq_phys, GFP_KERNEL);
1086         if (!ep->qp.sq_virt) {
1087                 printk(KERN_ALERT "bnx2i: unable to alloc SQ BD memory %d\n",
1088                                   ep->qp.sq_mem_size);
1089                 goto mem_alloc_err;
1090         }
1091
1092         memset(ep->qp.sq_virt, 0x00, ep->qp.sq_mem_size);
1093         ep->qp.sq_first_qe = ep->qp.sq_virt;
1094         ep->qp.sq_prod_qe = ep->qp.sq_first_qe;
1095         ep->qp.sq_cons_qe = ep->qp.sq_first_qe;
1096         ep->qp.sq_last_qe = &ep->qp.sq_first_qe[hba->max_sqes - 1];
1097         ep->qp.sq_prod_idx = 0;
1098         ep->qp.sq_cons_idx = 0;
1099         ep->qp.sqe_left = hba->max_sqes;
1100
1101         /* Allocate page table memory for CQ which is page aligned */
1102         ep->qp.cq_mem_size = hba->max_cqes * BNX2I_CQE_SIZE;
1103         ep->qp.cq_mem_size =
1104                 (ep->qp.cq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
1105         ep->qp.cq_pgtbl_size =
1106                 (ep->qp.cq_mem_size / PAGE_SIZE) * sizeof(void *);
1107         ep->qp.cq_pgtbl_size =
1108                 (ep->qp.cq_pgtbl_size + (PAGE_SIZE - 1)) & PAGE_MASK;
1109
1110         ep->qp.cq_pgtbl_virt =
1111                 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.cq_pgtbl_size,
1112                                    &ep->qp.cq_pgtbl_phys, GFP_KERNEL);
1113         if (!ep->qp.cq_pgtbl_virt) {
1114                 printk(KERN_ALERT "bnx2i: unable to alloc CQ PT memory %d\n",
1115                                   ep->qp.cq_pgtbl_size);
1116                 goto mem_alloc_err;
1117         }
1118
1119         /* Allocate memory area for actual CQ element */
1120         ep->qp.cq_virt =
1121                 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.cq_mem_size,
1122                                    &ep->qp.cq_phys, GFP_KERNEL);
1123         if (!ep->qp.cq_virt) {
1124                 printk(KERN_ALERT "bnx2i: unable to alloc CQ BD memory %d\n",
1125                                   ep->qp.cq_mem_size);
1126                 goto mem_alloc_err;
1127         }
1128         memset(ep->qp.cq_virt, 0x00, ep->qp.cq_mem_size);
1129
1130         ep->qp.cq_first_qe = ep->qp.cq_virt;
1131         ep->qp.cq_prod_qe = ep->qp.cq_first_qe;
1132         ep->qp.cq_cons_qe = ep->qp.cq_first_qe;
1133         ep->qp.cq_last_qe = &ep->qp.cq_first_qe[hba->max_cqes - 1];
1134         ep->qp.cq_prod_idx = 0;
1135         ep->qp.cq_cons_idx = 0;
1136         ep->qp.cqe_left = hba->max_cqes;
1137         ep->qp.cqe_exp_seq_sn = ISCSI_INITIAL_SN;
1138         ep->qp.cqe_size = hba->max_cqes;
1139
1140         /* Invalidate all EQ CQE index, req only for 57710 */
1141         cq_db = (struct bnx2i_5771x_cq_db *) ep->qp.cq_pgtbl_virt;
1142         memset(cq_db->sqn, 0xFF, sizeof(cq_db->sqn[0]) * BNX2X_MAX_CQS);
1143
1144         /* Allocate page table memory for RQ which is page aligned */
1145         ep->qp.rq_mem_size = hba->max_rqes * BNX2I_RQ_WQE_SIZE;
1146         ep->qp.rq_mem_size =
1147                 (ep->qp.rq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
1148         ep->qp.rq_pgtbl_size =
1149                 (ep->qp.rq_mem_size / PAGE_SIZE) * sizeof(void *);
1150         ep->qp.rq_pgtbl_size =
1151                 (ep->qp.rq_pgtbl_size + (PAGE_SIZE - 1)) & PAGE_MASK;
1152
1153         ep->qp.rq_pgtbl_virt =
1154                 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.rq_pgtbl_size,
1155                                    &ep->qp.rq_pgtbl_phys, GFP_KERNEL);
1156         if (!ep->qp.rq_pgtbl_virt) {
1157                 printk(KERN_ALERT "bnx2i: unable to alloc RQ PT mem %d\n",
1158                                   ep->qp.rq_pgtbl_size);
1159                 goto mem_alloc_err;
1160         }
1161
1162         /* Allocate memory area for actual RQ element */
1163         ep->qp.rq_virt =
1164                 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.rq_mem_size,
1165                                    &ep->qp.rq_phys, GFP_KERNEL);
1166         if (!ep->qp.rq_virt) {
1167                 printk(KERN_ALERT "bnx2i: unable to alloc RQ BD memory %d\n",
1168                                   ep->qp.rq_mem_size);
1169                 goto mem_alloc_err;
1170         }
1171
1172         ep->qp.rq_first_qe = ep->qp.rq_virt;
1173         ep->qp.rq_prod_qe = ep->qp.rq_first_qe;
1174         ep->qp.rq_cons_qe = ep->qp.rq_first_qe;
1175         ep->qp.rq_last_qe = &ep->qp.rq_first_qe[hba->max_rqes - 1];
1176         ep->qp.rq_prod_idx = 0x8000;
1177         ep->qp.rq_cons_idx = 0;
1178         ep->qp.rqe_left = hba->max_rqes;
1179
1180         setup_qp_page_tables(ep);
1181
1182         return 0;
1183
1184 mem_alloc_err:
1185         bnx2i_free_qp_resc(hba, ep);
1186         return -ENOMEM;
1187 }
1188
1189
1190
1191 /**
1192  * bnx2i_free_qp_resc - free memory resources held by QP
1193  * @hba:        adapter structure pointer
1194  * @ep: endpoint (transport indentifier) structure
1195  *
1196  * Free QP resources - SQ/RQ/CQ memory and page tables.
1197  */
1198 void bnx2i_free_qp_resc(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
1199 {
1200         if (ep->qp.ctx_base) {
1201                 iounmap(ep->qp.ctx_base);
1202                 ep->qp.ctx_base = NULL;
1203         }
1204         /* Free SQ mem */
1205         if (ep->qp.sq_pgtbl_virt) {
1206                 dma_free_coherent(&hba->pcidev->dev, ep->qp.sq_pgtbl_size,
1207                                   ep->qp.sq_pgtbl_virt, ep->qp.sq_pgtbl_phys);
1208                 ep->qp.sq_pgtbl_virt = NULL;
1209                 ep->qp.sq_pgtbl_phys = 0;
1210         }
1211         if (ep->qp.sq_virt) {
1212                 dma_free_coherent(&hba->pcidev->dev, ep->qp.sq_mem_size,
1213                                   ep->qp.sq_virt, ep->qp.sq_phys);
1214                 ep->qp.sq_virt = NULL;
1215                 ep->qp.sq_phys = 0;
1216         }
1217
1218         /* Free RQ mem */
1219         if (ep->qp.rq_pgtbl_virt) {
1220                 dma_free_coherent(&hba->pcidev->dev, ep->qp.rq_pgtbl_size,
1221                                   ep->qp.rq_pgtbl_virt, ep->qp.rq_pgtbl_phys);
1222                 ep->qp.rq_pgtbl_virt = NULL;
1223                 ep->qp.rq_pgtbl_phys = 0;
1224         }
1225         if (ep->qp.rq_virt) {
1226                 dma_free_coherent(&hba->pcidev->dev, ep->qp.rq_mem_size,
1227                                   ep->qp.rq_virt, ep->qp.rq_phys);
1228                 ep->qp.rq_virt = NULL;
1229                 ep->qp.rq_phys = 0;
1230         }
1231
1232         /* Free CQ mem */
1233         if (ep->qp.cq_pgtbl_virt) {
1234                 dma_free_coherent(&hba->pcidev->dev, ep->qp.cq_pgtbl_size,
1235                                   ep->qp.cq_pgtbl_virt, ep->qp.cq_pgtbl_phys);
1236                 ep->qp.cq_pgtbl_virt = NULL;
1237                 ep->qp.cq_pgtbl_phys = 0;
1238         }
1239         if (ep->qp.cq_virt) {
1240                 dma_free_coherent(&hba->pcidev->dev, ep->qp.cq_mem_size,
1241                                   ep->qp.cq_virt, ep->qp.cq_phys);
1242                 ep->qp.cq_virt = NULL;
1243                 ep->qp.cq_phys = 0;
1244         }
1245 }
1246
1247
1248 /**
1249  * bnx2i_send_fw_iscsi_init_msg - initiates initial handshake with iscsi f/w
1250  * @hba:        adapter structure pointer
1251  *
1252  * Send down iscsi_init KWQEs which initiates the initial handshake with the f/w
1253  *      This results in iSCSi support validation and on-chip context manager
1254  *      initialization.  Firmware completes this handshake with a CQE carrying
1255  *      the result of iscsi support validation. Parameter carried by
1256  *      iscsi init request determines the number of offloaded connection and
1257  *      tolerance level for iscsi protocol violation this hba/chip can support
1258  */
1259 int bnx2i_send_fw_iscsi_init_msg(struct bnx2i_hba *hba)
1260 {
1261         struct kwqe *kwqe_arr[3];
1262         struct iscsi_kwqe_init1 iscsi_init;
1263         struct iscsi_kwqe_init2 iscsi_init2;
1264         int rc = 0;
1265         u64 mask64;
1266
1267         bnx2i_adjust_qp_size(hba);
1268
1269         iscsi_init.flags =
1270                 ISCSI_PAGE_SIZE_4K << ISCSI_KWQE_INIT1_PAGE_SIZE_SHIFT;
1271         if (en_tcp_dack)
1272                 iscsi_init.flags |= ISCSI_KWQE_INIT1_DELAYED_ACK_ENABLE;
1273         iscsi_init.reserved0 = 0;
1274         iscsi_init.num_cqs = 1;
1275         iscsi_init.hdr.op_code = ISCSI_KWQE_OPCODE_INIT1;
1276         iscsi_init.hdr.flags =
1277                 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
1278
1279         iscsi_init.dummy_buffer_addr_lo = (u32) hba->dummy_buf_dma;
1280         iscsi_init.dummy_buffer_addr_hi =
1281                 (u32) ((u64) hba->dummy_buf_dma >> 32);
1282
1283         hba->num_ccell = hba->max_sqes >> 1;
1284         hba->ctx_ccell_tasks =
1285                         ((hba->num_ccell & 0xFFFF) | (hba->max_sqes << 16));
1286         iscsi_init.num_ccells_per_conn = hba->num_ccell;
1287         iscsi_init.num_tasks_per_conn = hba->max_sqes;
1288         iscsi_init.sq_wqes_per_page = PAGE_SIZE / BNX2I_SQ_WQE_SIZE;
1289         iscsi_init.sq_num_wqes = hba->max_sqes;
1290         iscsi_init.cq_log_wqes_per_page =
1291                 (u8) bnx2i_power_of2(PAGE_SIZE / BNX2I_CQE_SIZE);
1292         iscsi_init.cq_num_wqes = hba->max_cqes;
1293         iscsi_init.cq_num_pages = (hba->max_cqes * BNX2I_CQE_SIZE +
1294                                    (PAGE_SIZE - 1)) / PAGE_SIZE;
1295         iscsi_init.sq_num_pages = (hba->max_sqes * BNX2I_SQ_WQE_SIZE +
1296                                    (PAGE_SIZE - 1)) / PAGE_SIZE;
1297         iscsi_init.rq_buffer_size = BNX2I_RQ_WQE_SIZE;
1298         iscsi_init.rq_num_wqes = hba->max_rqes;
1299
1300
1301         iscsi_init2.hdr.op_code = ISCSI_KWQE_OPCODE_INIT2;
1302         iscsi_init2.hdr.flags =
1303                 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
1304         iscsi_init2.max_cq_sqn = hba->max_cqes * 2 + 1;
1305         mask64 = 0x0ULL;
1306         mask64 |= (
1307                 /* CISCO MDS */
1308                 (1UL <<
1309                   ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_NOT_RSRV) |
1310                 /* HP MSA1510i */
1311                 (1UL <<
1312                   ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_EXP_DATASN) |
1313                 /* EMC */
1314                 (1ULL << ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_LUN));
1315         if (error_mask1)
1316                 iscsi_init2.error_bit_map[0] = error_mask1;
1317         else
1318                 iscsi_init2.error_bit_map[0] = (u32) mask64;
1319
1320         if (error_mask2)
1321                 iscsi_init2.error_bit_map[1] = error_mask2;
1322         else
1323                 iscsi_init2.error_bit_map[1] = (u32) (mask64 >> 32);
1324
1325         iscsi_error_mask = mask64;
1326
1327         kwqe_arr[0] = (struct kwqe *) &iscsi_init;
1328         kwqe_arr[1] = (struct kwqe *) &iscsi_init2;
1329
1330         if (hba->cnic && hba->cnic->submit_kwqes)
1331                 rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 2);
1332         return rc;
1333 }
1334
1335
1336 /**
1337  * bnx2i_process_scsi_cmd_resp - this function handles scsi cmd completion.
1338  * @session:    iscsi session
1339  * @bnx2i_conn: bnx2i connection
1340  * @cqe:        pointer to newly DMA'ed CQE entry for processing
1341  *
1342  * process SCSI CMD Response CQE & complete the request to SCSI-ML
1343  */
1344 int bnx2i_process_scsi_cmd_resp(struct iscsi_session *session,
1345                                 struct bnx2i_conn *bnx2i_conn,
1346                                 struct cqe *cqe)
1347 {
1348         struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1349         struct bnx2i_cmd_response *resp_cqe;
1350         struct bnx2i_cmd *bnx2i_cmd;
1351         struct iscsi_task *task;
1352         struct iscsi_cmd_rsp *hdr;
1353         u32 datalen = 0;
1354
1355         resp_cqe = (struct bnx2i_cmd_response *)cqe;
1356         spin_lock_bh(&session->lock);
1357         task = iscsi_itt_to_task(conn,
1358                                  resp_cqe->itt & ISCSI_CMD_RESPONSE_INDEX);
1359         if (!task)
1360                 goto fail;
1361
1362         bnx2i_cmd = task->dd_data;
1363
1364         if (bnx2i_cmd->req.op_attr & ISCSI_CMD_REQUEST_READ) {
1365                 conn->datain_pdus_cnt +=
1366                         resp_cqe->task_stat.read_stat.num_data_outs;
1367                 conn->rxdata_octets +=
1368                         bnx2i_cmd->req.total_data_transfer_length;
1369         } else {
1370                 conn->dataout_pdus_cnt +=
1371                         resp_cqe->task_stat.read_stat.num_data_outs;
1372                 conn->r2t_pdus_cnt +=
1373                         resp_cqe->task_stat.read_stat.num_r2ts;
1374                 conn->txdata_octets +=
1375                         bnx2i_cmd->req.total_data_transfer_length;
1376         }
1377         bnx2i_iscsi_unmap_sg_list(bnx2i_cmd);
1378
1379         hdr = (struct iscsi_cmd_rsp *)task->hdr;
1380         resp_cqe = (struct bnx2i_cmd_response *)cqe;
1381         hdr->opcode = resp_cqe->op_code;
1382         hdr->max_cmdsn = cpu_to_be32(resp_cqe->max_cmd_sn);
1383         hdr->exp_cmdsn = cpu_to_be32(resp_cqe->exp_cmd_sn);
1384         hdr->response = resp_cqe->response;
1385         hdr->cmd_status = resp_cqe->status;
1386         hdr->flags = resp_cqe->response_flags;
1387         hdr->residual_count = cpu_to_be32(resp_cqe->residual_count);
1388
1389         if (resp_cqe->op_code == ISCSI_OP_SCSI_DATA_IN)
1390                 goto done;
1391
1392         if (resp_cqe->status == SAM_STAT_CHECK_CONDITION) {
1393                 datalen = resp_cqe->data_length;
1394                 if (datalen < 2)
1395                         goto done;
1396
1397                 if (datalen > BNX2I_RQ_WQE_SIZE) {
1398                         iscsi_conn_printk(KERN_ERR, conn,
1399                                           "sense data len %d > RQ sz\n",
1400                                           datalen);
1401                         datalen = BNX2I_RQ_WQE_SIZE;
1402                 } else if (datalen > ISCSI_DEF_MAX_RECV_SEG_LEN) {
1403                         iscsi_conn_printk(KERN_ERR, conn,
1404                                           "sense data len %d > conn data\n",
1405                                           datalen);
1406                         datalen = ISCSI_DEF_MAX_RECV_SEG_LEN;
1407                 }
1408
1409                 bnx2i_get_rq_buf(bnx2i_cmd->conn, conn->data, datalen);
1410                 bnx2i_put_rq_buf(bnx2i_cmd->conn, 1);
1411         }
1412
1413 done:
1414         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr,
1415                              conn->data, datalen);
1416 fail:
1417         spin_unlock_bh(&session->lock);
1418         return 0;
1419 }
1420
1421
1422 /**
1423  * bnx2i_process_login_resp - this function handles iscsi login response
1424  * @session:            iscsi session pointer
1425  * @bnx2i_conn:         iscsi connection pointer
1426  * @cqe:                pointer to newly DMA'ed CQE entry for processing
1427  *
1428  * process Login Response CQE & complete it to open-iscsi user daemon
1429  */
1430 static int bnx2i_process_login_resp(struct iscsi_session *session,
1431                                     struct bnx2i_conn *bnx2i_conn,
1432                                     struct cqe *cqe)
1433 {
1434         struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1435         struct iscsi_task *task;
1436         struct bnx2i_login_response *login;
1437         struct iscsi_login_rsp *resp_hdr;
1438         int pld_len;
1439         int pad_len;
1440
1441         login = (struct bnx2i_login_response *) cqe;
1442         spin_lock(&session->lock);
1443         task = iscsi_itt_to_task(conn,
1444                                  login->itt & ISCSI_LOGIN_RESPONSE_INDEX);
1445         if (!task)
1446                 goto done;
1447
1448         resp_hdr = (struct iscsi_login_rsp *) &bnx2i_conn->gen_pdu.resp_hdr;
1449         memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1450         resp_hdr->opcode = login->op_code;
1451         resp_hdr->flags = login->response_flags;
1452         resp_hdr->max_version = login->version_max;
1453         resp_hdr->active_version = login->version_active;
1454         resp_hdr->hlength = 0;
1455
1456         hton24(resp_hdr->dlength, login->data_length);
1457         memcpy(resp_hdr->isid, &login->isid_lo, 6);
1458         resp_hdr->tsih = cpu_to_be16(login->tsih);
1459         resp_hdr->itt = task->hdr->itt;
1460         resp_hdr->statsn = cpu_to_be32(login->stat_sn);
1461         resp_hdr->exp_cmdsn = cpu_to_be32(login->exp_cmd_sn);
1462         resp_hdr->max_cmdsn = cpu_to_be32(login->max_cmd_sn);
1463         resp_hdr->status_class = login->status_class;
1464         resp_hdr->status_detail = login->status_detail;
1465         pld_len = login->data_length;
1466         bnx2i_conn->gen_pdu.resp_wr_ptr =
1467                                         bnx2i_conn->gen_pdu.resp_buf + pld_len;
1468
1469         pad_len = 0;
1470         if (pld_len & 0x3)
1471                 pad_len = 4 - (pld_len % 4);
1472
1473         if (pad_len) {
1474                 int i = 0;
1475                 for (i = 0; i < pad_len; i++) {
1476                         bnx2i_conn->gen_pdu.resp_wr_ptr[0] = 0;
1477                         bnx2i_conn->gen_pdu.resp_wr_ptr++;
1478                 }
1479         }
1480
1481         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr,
1482                 bnx2i_conn->gen_pdu.resp_buf,
1483                 bnx2i_conn->gen_pdu.resp_wr_ptr - bnx2i_conn->gen_pdu.resp_buf);
1484 done:
1485         spin_unlock(&session->lock);
1486         return 0;
1487 }
1488
1489
1490 /**
1491  * bnx2i_process_text_resp - this function handles iscsi text response
1492  * @session:    iscsi session pointer
1493  * @bnx2i_conn: iscsi connection pointer
1494  * @cqe:        pointer to newly DMA'ed CQE entry for processing
1495  *
1496  * process iSCSI Text Response CQE&  complete it to open-iscsi user daemon
1497  */
1498 static int bnx2i_process_text_resp(struct iscsi_session *session,
1499                                    struct bnx2i_conn *bnx2i_conn,
1500                                    struct cqe *cqe)
1501 {
1502         struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1503         struct iscsi_task *task;
1504         struct bnx2i_text_response *text;
1505         struct iscsi_text_rsp *resp_hdr;
1506         int pld_len;
1507         int pad_len;
1508
1509         text = (struct bnx2i_text_response *) cqe;
1510         spin_lock(&session->lock);
1511         task = iscsi_itt_to_task(conn, text->itt & ISCSI_LOGIN_RESPONSE_INDEX);
1512         if (!task)
1513                 goto done;
1514
1515         resp_hdr = (struct iscsi_text_rsp *)&bnx2i_conn->gen_pdu.resp_hdr;
1516         memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1517         resp_hdr->opcode = text->op_code;
1518         resp_hdr->flags = text->response_flags;
1519         resp_hdr->hlength = 0;
1520
1521         hton24(resp_hdr->dlength, text->data_length);
1522         resp_hdr->itt = task->hdr->itt;
1523         resp_hdr->ttt = cpu_to_be32(text->ttt);
1524         resp_hdr->statsn = task->hdr->exp_statsn;
1525         resp_hdr->exp_cmdsn = cpu_to_be32(text->exp_cmd_sn);
1526         resp_hdr->max_cmdsn = cpu_to_be32(text->max_cmd_sn);
1527         pld_len = text->data_length;
1528         bnx2i_conn->gen_pdu.resp_wr_ptr = bnx2i_conn->gen_pdu.resp_buf +
1529                                           pld_len;
1530         pad_len = 0;
1531         if (pld_len & 0x3)
1532                 pad_len = 4 - (pld_len % 4);
1533
1534         if (pad_len) {
1535                 int i = 0;
1536                 for (i = 0; i < pad_len; i++) {
1537                         bnx2i_conn->gen_pdu.resp_wr_ptr[0] = 0;
1538                         bnx2i_conn->gen_pdu.resp_wr_ptr++;
1539                 }
1540         }
1541         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr,
1542                              bnx2i_conn->gen_pdu.resp_buf,
1543                              bnx2i_conn->gen_pdu.resp_wr_ptr -
1544                              bnx2i_conn->gen_pdu.resp_buf);
1545 done:
1546         spin_unlock(&session->lock);
1547         return 0;
1548 }
1549
1550
1551 /**
1552  * bnx2i_process_tmf_resp - this function handles iscsi TMF response
1553  * @session:            iscsi session pointer
1554  * @bnx2i_conn:         iscsi connection pointer
1555  * @cqe:                pointer to newly DMA'ed CQE entry for processing
1556  *
1557  * process iSCSI TMF Response CQE and wake up the driver eh thread.
1558  */
1559 static int bnx2i_process_tmf_resp(struct iscsi_session *session,
1560                                   struct bnx2i_conn *bnx2i_conn,
1561                                   struct cqe *cqe)
1562 {
1563         struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1564         struct iscsi_task *task;
1565         struct bnx2i_tmf_response *tmf_cqe;
1566         struct iscsi_tm_rsp *resp_hdr;
1567
1568         tmf_cqe = (struct bnx2i_tmf_response *)cqe;
1569         spin_lock(&session->lock);
1570         task = iscsi_itt_to_task(conn,
1571                                  tmf_cqe->itt & ISCSI_TMF_RESPONSE_INDEX);
1572         if (!task)
1573                 goto done;
1574
1575         resp_hdr = (struct iscsi_tm_rsp *) &bnx2i_conn->gen_pdu.resp_hdr;
1576         memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1577         resp_hdr->opcode = tmf_cqe->op_code;
1578         resp_hdr->max_cmdsn = cpu_to_be32(tmf_cqe->max_cmd_sn);
1579         resp_hdr->exp_cmdsn = cpu_to_be32(tmf_cqe->exp_cmd_sn);
1580         resp_hdr->itt = task->hdr->itt;
1581         resp_hdr->response = tmf_cqe->response;
1582
1583         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0);
1584 done:
1585         spin_unlock(&session->lock);
1586         return 0;
1587 }
1588
1589 /**
1590  * bnx2i_process_logout_resp - this function handles iscsi logout response
1591  * @session:            iscsi session pointer
1592  * @bnx2i_conn:         iscsi connection pointer
1593  * @cqe:                pointer to newly DMA'ed CQE entry for processing
1594  *
1595  * process iSCSI Logout Response CQE & make function call to
1596  * notify the user daemon.
1597  */
1598 static int bnx2i_process_logout_resp(struct iscsi_session *session,
1599                                      struct bnx2i_conn *bnx2i_conn,
1600                                      struct cqe *cqe)
1601 {
1602         struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1603         struct iscsi_task *task;
1604         struct bnx2i_logout_response *logout;
1605         struct iscsi_logout_rsp *resp_hdr;
1606
1607         logout = (struct bnx2i_logout_response *) cqe;
1608         spin_lock(&session->lock);
1609         task = iscsi_itt_to_task(conn,
1610                                  logout->itt & ISCSI_LOGOUT_RESPONSE_INDEX);
1611         if (!task)
1612                 goto done;
1613
1614         resp_hdr = (struct iscsi_logout_rsp *) &bnx2i_conn->gen_pdu.resp_hdr;
1615         memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1616         resp_hdr->opcode = logout->op_code;
1617         resp_hdr->flags = logout->response;
1618         resp_hdr->hlength = 0;
1619
1620         resp_hdr->itt = task->hdr->itt;
1621         resp_hdr->statsn = task->hdr->exp_statsn;
1622         resp_hdr->exp_cmdsn = cpu_to_be32(logout->exp_cmd_sn);
1623         resp_hdr->max_cmdsn = cpu_to_be32(logout->max_cmd_sn);
1624
1625         resp_hdr->t2wait = cpu_to_be32(logout->time_to_wait);
1626         resp_hdr->t2retain = cpu_to_be32(logout->time_to_retain);
1627
1628         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0);
1629
1630         bnx2i_conn->ep->state = EP_STATE_LOGOUT_RESP_RCVD;
1631 done:
1632         spin_unlock(&session->lock);
1633         return 0;
1634 }
1635
1636 /**
1637  * bnx2i_process_nopin_local_cmpl - this function handles iscsi nopin CQE
1638  * @session:            iscsi session pointer
1639  * @bnx2i_conn:         iscsi connection pointer
1640  * @cqe:                pointer to newly DMA'ed CQE entry for processing
1641  *
1642  * process iSCSI NOPIN local completion CQE, frees IIT and command structures
1643  */
1644 static void bnx2i_process_nopin_local_cmpl(struct iscsi_session *session,
1645                                            struct bnx2i_conn *bnx2i_conn,
1646                                            struct cqe *cqe)
1647 {
1648         struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1649         struct bnx2i_nop_in_msg *nop_in;
1650         struct iscsi_task *task;
1651
1652         nop_in = (struct bnx2i_nop_in_msg *)cqe;
1653         spin_lock(&session->lock);
1654         task = iscsi_itt_to_task(conn,
1655                                  nop_in->itt & ISCSI_NOP_IN_MSG_INDEX);
1656         if (task)
1657                 __iscsi_put_task(task);
1658         spin_unlock(&session->lock);
1659 }
1660
1661 /**
1662  * bnx2i_unsol_pdu_adjust_rq - makes adjustments to RQ after unsol pdu is recvd
1663  * @conn:       iscsi connection
1664  *
1665  * Firmware advances RQ producer index for every unsolicited PDU even if
1666  *      payload data length is '0'. This function makes corresponding
1667  *      adjustments on the driver side to match this f/w behavior
1668  */
1669 static void bnx2i_unsol_pdu_adjust_rq(struct bnx2i_conn *bnx2i_conn)
1670 {
1671         char dummy_rq_data[2];
1672         bnx2i_get_rq_buf(bnx2i_conn, dummy_rq_data, 1);
1673         bnx2i_put_rq_buf(bnx2i_conn, 1);
1674 }
1675
1676
1677 /**
1678  * bnx2i_process_nopin_mesg - this function handles iscsi nopin CQE
1679  * @session:            iscsi session pointer
1680  * @bnx2i_conn:         iscsi connection pointer
1681  * @cqe:                pointer to newly DMA'ed CQE entry for processing
1682  *
1683  * process iSCSI target's proactive iSCSI NOPIN request
1684  */
1685 static int bnx2i_process_nopin_mesg(struct iscsi_session *session,
1686                                      struct bnx2i_conn *bnx2i_conn,
1687                                      struct cqe *cqe)
1688 {
1689         struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1690         struct iscsi_task *task;
1691         struct bnx2i_nop_in_msg *nop_in;
1692         struct iscsi_nopin *hdr;
1693         int tgt_async_nop = 0;
1694
1695         nop_in = (struct bnx2i_nop_in_msg *)cqe;
1696
1697         spin_lock(&session->lock);
1698         hdr = (struct iscsi_nopin *)&bnx2i_conn->gen_pdu.resp_hdr;
1699         memset(hdr, 0, sizeof(struct iscsi_hdr));
1700         hdr->opcode = nop_in->op_code;
1701         hdr->max_cmdsn = cpu_to_be32(nop_in->max_cmd_sn);
1702         hdr->exp_cmdsn = cpu_to_be32(nop_in->exp_cmd_sn);
1703         hdr->ttt = cpu_to_be32(nop_in->ttt);
1704
1705         if (nop_in->itt == (u16) RESERVED_ITT) {
1706                 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
1707                 hdr->itt = RESERVED_ITT;
1708                 tgt_async_nop = 1;
1709                 goto done;
1710         }
1711
1712         /* this is a response to one of our nop-outs */
1713         task = iscsi_itt_to_task(conn,
1714                          (itt_t) (nop_in->itt & ISCSI_NOP_IN_MSG_INDEX));
1715         if (task) {
1716                 hdr->flags = ISCSI_FLAG_CMD_FINAL;
1717                 hdr->itt = task->hdr->itt;
1718                 hdr->ttt = cpu_to_be32(nop_in->ttt);
1719                 memcpy(&hdr->lun, nop_in->lun, 8);
1720         }
1721 done:
1722         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, NULL, 0);
1723         spin_unlock(&session->lock);
1724
1725         return tgt_async_nop;
1726 }
1727
1728
1729 /**
1730  * bnx2i_process_async_mesg - this function handles iscsi async message
1731  * @session:            iscsi session pointer
1732  * @bnx2i_conn:         iscsi connection pointer
1733  * @cqe:                pointer to newly DMA'ed CQE entry for processing
1734  *
1735  * process iSCSI ASYNC Message
1736  */
1737 static void bnx2i_process_async_mesg(struct iscsi_session *session,
1738                                      struct bnx2i_conn *bnx2i_conn,
1739                                      struct cqe *cqe)
1740 {
1741         struct bnx2i_async_msg *async_cqe;
1742         struct iscsi_async *resp_hdr;
1743         u8 async_event;
1744
1745         bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
1746
1747         async_cqe = (struct bnx2i_async_msg *)cqe;
1748         async_event = async_cqe->async_event;
1749
1750         if (async_event == ISCSI_ASYNC_MSG_SCSI_EVENT) {
1751                 iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data,
1752                                   "async: scsi events not supported\n");
1753                 return;
1754         }
1755
1756         spin_lock(&session->lock);
1757         resp_hdr = (struct iscsi_async *) &bnx2i_conn->gen_pdu.resp_hdr;
1758         memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1759         resp_hdr->opcode = async_cqe->op_code;
1760         resp_hdr->flags = 0x80;
1761
1762         memcpy(&resp_hdr->lun, async_cqe->lun, 8);
1763         resp_hdr->exp_cmdsn = cpu_to_be32(async_cqe->exp_cmd_sn);
1764         resp_hdr->max_cmdsn = cpu_to_be32(async_cqe->max_cmd_sn);
1765
1766         resp_hdr->async_event = async_cqe->async_event;
1767         resp_hdr->async_vcode = async_cqe->async_vcode;
1768
1769         resp_hdr->param1 = cpu_to_be16(async_cqe->param1);
1770         resp_hdr->param2 = cpu_to_be16(async_cqe->param2);
1771         resp_hdr->param3 = cpu_to_be16(async_cqe->param3);
1772
1773         __iscsi_complete_pdu(bnx2i_conn->cls_conn->dd_data,
1774                              (struct iscsi_hdr *)resp_hdr, NULL, 0);
1775         spin_unlock(&session->lock);
1776 }
1777
1778
1779 /**
1780  * bnx2i_process_reject_mesg - process iscsi reject pdu
1781  * @session:            iscsi session pointer
1782  * @bnx2i_conn:         iscsi connection pointer
1783  * @cqe:                pointer to newly DMA'ed CQE entry for processing
1784  *
1785  * process iSCSI REJECT message
1786  */
1787 static void bnx2i_process_reject_mesg(struct iscsi_session *session,
1788                                       struct bnx2i_conn *bnx2i_conn,
1789                                       struct cqe *cqe)
1790 {
1791         struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1792         struct bnx2i_reject_msg *reject;
1793         struct iscsi_reject *hdr;
1794
1795         reject = (struct bnx2i_reject_msg *) cqe;
1796         if (reject->data_length) {
1797                 bnx2i_get_rq_buf(bnx2i_conn, conn->data, reject->data_length);
1798                 bnx2i_put_rq_buf(bnx2i_conn, 1);
1799         } else
1800                 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
1801
1802         spin_lock(&session->lock);
1803         hdr = (struct iscsi_reject *) &bnx2i_conn->gen_pdu.resp_hdr;
1804         memset(hdr, 0, sizeof(struct iscsi_hdr));
1805         hdr->opcode = reject->op_code;
1806         hdr->reason = reject->reason;
1807         hton24(hdr->dlength, reject->data_length);
1808         hdr->max_cmdsn = cpu_to_be32(reject->max_cmd_sn);
1809         hdr->exp_cmdsn = cpu_to_be32(reject->exp_cmd_sn);
1810         hdr->ffffffff = cpu_to_be32(RESERVED_ITT);
1811         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, conn->data,
1812                              reject->data_length);
1813         spin_unlock(&session->lock);
1814 }
1815
1816 /**
1817  * bnx2i_process_cmd_cleanup_resp - process scsi command clean-up completion
1818  * @session:            iscsi session pointer
1819  * @bnx2i_conn:         iscsi connection pointer
1820  * @cqe:                pointer to newly DMA'ed CQE entry for processing
1821  *
1822  * process command cleanup response CQE during conn shutdown or error recovery
1823  */
1824 static void bnx2i_process_cmd_cleanup_resp(struct iscsi_session *session,
1825                                            struct bnx2i_conn *bnx2i_conn,
1826                                            struct cqe *cqe)
1827 {
1828         struct bnx2i_cleanup_response *cmd_clean_rsp;
1829         struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1830         struct iscsi_task *task;
1831
1832         cmd_clean_rsp = (struct bnx2i_cleanup_response *)cqe;
1833         spin_lock(&session->lock);
1834         task = iscsi_itt_to_task(conn,
1835                         cmd_clean_rsp->itt & ISCSI_CLEANUP_RESPONSE_INDEX);
1836         if (!task)
1837                 printk(KERN_ALERT "bnx2i: cmd clean ITT %x not active\n",
1838                         cmd_clean_rsp->itt & ISCSI_CLEANUP_RESPONSE_INDEX);
1839         spin_unlock(&session->lock);
1840         complete(&bnx2i_conn->cmd_cleanup_cmpl);
1841 }
1842
1843
1844 /**
1845  * bnx2i_percpu_io_thread - thread per cpu for ios
1846  *
1847  * @arg:        ptr to bnx2i_percpu_info structure
1848  */
1849 int bnx2i_percpu_io_thread(void *arg)
1850 {
1851         struct bnx2i_percpu_s *p = arg;
1852         struct bnx2i_work *work, *tmp;
1853         LIST_HEAD(work_list);
1854
1855         set_user_nice(current, -20);
1856
1857         while (!kthread_should_stop()) {
1858                 spin_lock_bh(&p->p_work_lock);
1859                 while (!list_empty(&p->work_list)) {
1860                         list_splice_init(&p->work_list, &work_list);
1861                         spin_unlock_bh(&p->p_work_lock);
1862
1863                         list_for_each_entry_safe(work, tmp, &work_list, list) {
1864                                 list_del_init(&work->list);
1865                                 /* work allocated in the bh, freed here */
1866                                 bnx2i_process_scsi_cmd_resp(work->session,
1867                                                             work->bnx2i_conn,
1868                                                             &work->cqe);
1869                                 atomic_dec(&work->bnx2i_conn->work_cnt);
1870                                 kfree(work);
1871                         }
1872                         spin_lock_bh(&p->p_work_lock);
1873                 }
1874                 set_current_state(TASK_INTERRUPTIBLE);
1875                 spin_unlock_bh(&p->p_work_lock);
1876                 schedule();
1877         }
1878         __set_current_state(TASK_RUNNING);
1879
1880         return 0;
1881 }
1882
1883
1884 /**
1885  * bnx2i_queue_scsi_cmd_resp - queue cmd completion to the percpu thread
1886  * @bnx2i_conn:         bnx2i connection
1887  *
1888  * this function is called by generic KCQ handler to queue all pending cmd
1889  * completion CQEs
1890  *
1891  * The implementation is to queue the cmd response based on the
1892  * last recorded command for the given connection.  The
1893  * cpu_id gets recorded upon task_xmit.  No out-of-order completion!
1894  */
1895 static int bnx2i_queue_scsi_cmd_resp(struct iscsi_session *session,
1896                                      struct bnx2i_conn *bnx2i_conn,
1897                                      struct bnx2i_nop_in_msg *cqe)
1898 {
1899         struct bnx2i_work *bnx2i_work = NULL;
1900         struct bnx2i_percpu_s *p = NULL;
1901         struct iscsi_task *task;
1902         struct scsi_cmnd *sc;
1903         int rc = 0;
1904         int cpu;
1905
1906         spin_lock(&session->lock);
1907         task = iscsi_itt_to_task(bnx2i_conn->cls_conn->dd_data,
1908                                  cqe->itt & ISCSI_CMD_RESPONSE_INDEX);
1909         if (!task) {
1910                 spin_unlock(&session->lock);
1911                 return -EINVAL;
1912         }
1913         sc = task->sc;
1914         spin_unlock(&session->lock);
1915
1916         if (!blk_rq_cpu_valid(sc->request))
1917                 cpu = smp_processor_id();
1918         else
1919                 cpu = sc->request->cpu;
1920
1921         p = &per_cpu(bnx2i_percpu, cpu);
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  */
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 qp_info *qp;
1960         struct bnx2i_nop_in_msg *nopin;
1961         int tgt_async_msg;
1962         int cqe_cnt = 0;
1963
1964         if (bnx2i_conn->ep == NULL)
1965                 return 0;
1966
1967         qp = &bnx2i_conn->ep->qp;
1968
1969         if (!qp->cq_virt) {
1970                 printk(KERN_ALERT "bnx2i (%s): cq resr freed in bh execution!",
1971                         bnx2i_conn->hba->netdev->name);
1972                 goto out;
1973         }
1974         while (1) {
1975                 nopin = (struct bnx2i_nop_in_msg *) qp->cq_cons_qe;
1976                 if (nopin->cq_req_sn != qp->cqe_exp_seq_sn)
1977                         break;
1978
1979                 if (unlikely(test_bit(ISCSI_SUSPEND_BIT, &conn->suspend_rx))) {
1980                         if (nopin->op_code == ISCSI_OP_NOOP_IN &&
1981                             nopin->itt == (u16) RESERVED_ITT) {
1982                                 printk(KERN_ALERT "bnx2i: Unsolicited "
1983                                         "NOP-In detected for suspended "
1984                                         "connection dev=%s!\n",
1985                                         bnx2i_conn->hba->netdev->name);
1986                                 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
1987                                 goto cqe_out;
1988                         }
1989                         break;
1990                 }
1991                 tgt_async_msg = 0;
1992
1993                 switch (nopin->op_code) {
1994                 case ISCSI_OP_SCSI_CMD_RSP:
1995                 case ISCSI_OP_SCSI_DATA_IN:
1996                         /* Run the kthread engine only for data cmds
1997                            All other cmds will be completed in this bh! */
1998                         bnx2i_queue_scsi_cmd_resp(session, bnx2i_conn, nopin);
1999                         break;
2000                 case ISCSI_OP_LOGIN_RSP:
2001                         bnx2i_process_login_resp(session, bnx2i_conn,
2002                                                  qp->cq_cons_qe);
2003                         break;
2004                 case ISCSI_OP_SCSI_TMFUNC_RSP:
2005                         bnx2i_process_tmf_resp(session, bnx2i_conn,
2006                                                qp->cq_cons_qe);
2007                         break;
2008                 case ISCSI_OP_TEXT_RSP:
2009                         bnx2i_process_text_resp(session, bnx2i_conn,
2010                                                 qp->cq_cons_qe);
2011                         break;
2012                 case ISCSI_OP_LOGOUT_RSP:
2013                         bnx2i_process_logout_resp(session, bnx2i_conn,
2014                                                   qp->cq_cons_qe);
2015                         break;
2016                 case ISCSI_OP_NOOP_IN:
2017                         if (bnx2i_process_nopin_mesg(session, bnx2i_conn,
2018                                                      qp->cq_cons_qe))
2019                                 tgt_async_msg = 1;
2020                         break;
2021                 case ISCSI_OPCODE_NOPOUT_LOCAL_COMPLETION:
2022                         bnx2i_process_nopin_local_cmpl(session, bnx2i_conn,
2023                                                        qp->cq_cons_qe);
2024                         break;
2025                 case ISCSI_OP_ASYNC_EVENT:
2026                         bnx2i_process_async_mesg(session, bnx2i_conn,
2027                                                  qp->cq_cons_qe);
2028                         tgt_async_msg = 1;
2029                         break;
2030                 case ISCSI_OP_REJECT:
2031                         bnx2i_process_reject_mesg(session, bnx2i_conn,
2032                                                   qp->cq_cons_qe);
2033                         break;
2034                 case ISCSI_OPCODE_CLEANUP_RESPONSE:
2035                         bnx2i_process_cmd_cleanup_resp(session, bnx2i_conn,
2036                                                        qp->cq_cons_qe);
2037                         break;
2038                 default:
2039                         printk(KERN_ALERT "bnx2i: unknown opcode 0x%x\n",
2040                                           nopin->op_code);
2041                 }
2042                 if (!tgt_async_msg) {
2043                         if (!atomic_read(&bnx2i_conn->ep->num_active_cmds))
2044                                 printk(KERN_ALERT "bnx2i (%s): no active cmd! "
2045                                        "op 0x%x\n",
2046                                        bnx2i_conn->hba->netdev->name,
2047                                        nopin->op_code);
2048                         else
2049                                 atomic_dec(&bnx2i_conn->ep->num_active_cmds);
2050                 }
2051 cqe_out:
2052                 /* clear out in production version only, till beta keep opcode
2053                  * field intact, will be helpful in debugging (context dump)
2054                  * nopin->op_code = 0;
2055                  */
2056                 cqe_cnt++;
2057                 qp->cqe_exp_seq_sn++;
2058                 if (qp->cqe_exp_seq_sn == (qp->cqe_size * 2 + 1))
2059                         qp->cqe_exp_seq_sn = ISCSI_INITIAL_SN;
2060
2061                 if (qp->cq_cons_qe == qp->cq_last_qe) {
2062                         qp->cq_cons_qe = qp->cq_first_qe;
2063                         qp->cq_cons_idx = 0;
2064                 } else {
2065                         qp->cq_cons_qe++;
2066                         qp->cq_cons_idx++;
2067                 }
2068         }
2069 out:
2070         return cqe_cnt;
2071 }
2072
2073 /**
2074  * bnx2i_fastpath_notification - process global event queue (KCQ)
2075  * @hba:                adapter structure pointer
2076  * @new_cqe_kcqe:       pointer to newly DMA'ed KCQE entry
2077  *
2078  * Fast path event notification handler, KCQ entry carries context id
2079  *      of the connection that has 1 or more pending CQ entries
2080  */
2081 static void bnx2i_fastpath_notification(struct bnx2i_hba *hba,
2082                                         struct iscsi_kcqe *new_cqe_kcqe)
2083 {
2084         struct bnx2i_conn *bnx2i_conn;
2085         u32 iscsi_cid;
2086         int nxt_idx;
2087
2088         iscsi_cid = new_cqe_kcqe->iscsi_conn_id;
2089         bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
2090
2091         if (!bnx2i_conn) {
2092                 printk(KERN_ALERT "cid #%x not valid\n", iscsi_cid);
2093                 return;
2094         }
2095         if (!bnx2i_conn->ep) {
2096                 printk(KERN_ALERT "cid #%x - ep not bound\n", iscsi_cid);
2097                 return;
2098         }
2099
2100         bnx2i_process_new_cqes(bnx2i_conn);
2101         nxt_idx = bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep,
2102                                                 CNIC_ARM_CQE_FP);
2103         if (nxt_idx && nxt_idx == bnx2i_process_new_cqes(bnx2i_conn))
2104                 bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep, CNIC_ARM_CQE_FP);
2105 }
2106
2107
2108 /**
2109  * bnx2i_process_update_conn_cmpl - process iscsi conn update completion KCQE
2110  * @hba:                adapter structure pointer
2111  * @update_kcqe:        kcqe pointer
2112  *
2113  * CONN_UPDATE completion handler, this completes iSCSI connection FFP migration
2114  */
2115 static void bnx2i_process_update_conn_cmpl(struct bnx2i_hba *hba,
2116                                            struct iscsi_kcqe *update_kcqe)
2117 {
2118         struct bnx2i_conn *conn;
2119         u32 iscsi_cid;
2120
2121         iscsi_cid = update_kcqe->iscsi_conn_id;
2122         conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
2123
2124         if (!conn) {
2125                 printk(KERN_ALERT "conn_update: cid %x not valid\n", iscsi_cid);
2126                 return;
2127         }
2128         if (!conn->ep) {
2129                 printk(KERN_ALERT "cid %x does not have ep bound\n", iscsi_cid);
2130                 return;
2131         }
2132
2133         if (update_kcqe->completion_status) {
2134                 printk(KERN_ALERT "request failed cid %x\n", iscsi_cid);
2135                 conn->ep->state = EP_STATE_ULP_UPDATE_FAILED;
2136         } else
2137                 conn->ep->state = EP_STATE_ULP_UPDATE_COMPL;
2138
2139         wake_up_interruptible(&conn->ep->ofld_wait);
2140 }
2141
2142
2143 /**
2144  * bnx2i_recovery_que_add_conn - add connection to recovery queue
2145  * @hba:                adapter structure pointer
2146  * @bnx2i_conn:         iscsi connection
2147  *
2148  * Add connection to recovery queue and schedule adapter eh worker
2149  */
2150 static void bnx2i_recovery_que_add_conn(struct bnx2i_hba *hba,
2151                                         struct bnx2i_conn *bnx2i_conn)
2152 {
2153         iscsi_conn_failure(bnx2i_conn->cls_conn->dd_data,
2154                            ISCSI_ERR_CONN_FAILED);
2155 }
2156
2157
2158 /**
2159  * bnx2i_process_tcp_error - process error notification on a given connection
2160  *
2161  * @hba:                adapter structure pointer
2162  * @tcp_err:            tcp error kcqe pointer
2163  *
2164  * handles tcp level error notifications from FW.
2165  */
2166 static void bnx2i_process_tcp_error(struct bnx2i_hba *hba,
2167                                     struct iscsi_kcqe *tcp_err)
2168 {
2169         struct bnx2i_conn *bnx2i_conn;
2170         u32 iscsi_cid;
2171
2172         iscsi_cid = tcp_err->iscsi_conn_id;
2173         bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
2174
2175         if (!bnx2i_conn) {
2176                 printk(KERN_ALERT "bnx2i - cid 0x%x not valid\n", iscsi_cid);
2177                 return;
2178         }
2179
2180         printk(KERN_ALERT "bnx2i - cid 0x%x had TCP errors, error code 0x%x\n",
2181                           iscsi_cid, tcp_err->completion_status);
2182         bnx2i_recovery_que_add_conn(bnx2i_conn->hba, bnx2i_conn);
2183 }
2184
2185
2186 /**
2187  * bnx2i_process_iscsi_error - process error notification on a given connection
2188  * @hba:                adapter structure pointer
2189  * @iscsi_err:          iscsi error kcqe pointer
2190  *
2191  * handles iscsi error notifications from the FW. Firmware based in initial
2192  *      handshake classifies iscsi protocol / TCP rfc violation into either
2193  *      warning or error indications. If indication is of "Error" type, driver
2194  *      will initiate session recovery for that connection/session. For
2195  *      "Warning" type indication, driver will put out a system log message
2196  *      (there will be only one message for each type for the life of the
2197  *      session, this is to avoid un-necessarily overloading the system)
2198  */
2199 static void bnx2i_process_iscsi_error(struct bnx2i_hba *hba,
2200                                       struct iscsi_kcqe *iscsi_err)
2201 {
2202         struct bnx2i_conn *bnx2i_conn;
2203         u32 iscsi_cid;
2204         char warn_notice[] = "iscsi_warning";
2205         char error_notice[] = "iscsi_error";
2206         char additional_notice[64];
2207         char *message;
2208         int need_recovery;
2209         u64 err_mask64;
2210
2211         iscsi_cid = iscsi_err->iscsi_conn_id;
2212         bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
2213         if (!bnx2i_conn) {
2214                 printk(KERN_ALERT "bnx2i - cid 0x%x not valid\n", iscsi_cid);
2215                 return;
2216         }
2217
2218         err_mask64 = (0x1ULL << iscsi_err->completion_status);
2219
2220         if (err_mask64 & iscsi_error_mask) {
2221                 need_recovery = 0;
2222                 message = warn_notice;
2223         } else {
2224                 need_recovery = 1;
2225                 message = error_notice;
2226         }
2227
2228         switch (iscsi_err->completion_status) {
2229         case ISCSI_KCQE_COMPLETION_STATUS_HDR_DIG_ERR:
2230                 strcpy(additional_notice, "hdr digest err");
2231                 break;
2232         case ISCSI_KCQE_COMPLETION_STATUS_DATA_DIG_ERR:
2233                 strcpy(additional_notice, "data digest err");
2234                 break;
2235         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_OPCODE:
2236                 strcpy(additional_notice, "wrong opcode rcvd");
2237                 break;
2238         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_AHS_LEN:
2239                 strcpy(additional_notice, "AHS len > 0 rcvd");
2240                 break;
2241         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_ITT:
2242                 strcpy(additional_notice, "invalid ITT rcvd");
2243                 break;
2244         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_STATSN:
2245                 strcpy(additional_notice, "wrong StatSN rcvd");
2246                 break;
2247         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_EXP_DATASN:
2248                 strcpy(additional_notice, "wrong DataSN rcvd");
2249                 break;
2250         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T:
2251                 strcpy(additional_notice, "pend R2T violation");
2252                 break;
2253         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_0:
2254                 strcpy(additional_notice, "ERL0, UO");
2255                 break;
2256         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_1:
2257                 strcpy(additional_notice, "ERL0, U1");
2258                 break;
2259         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_2:
2260                 strcpy(additional_notice, "ERL0, U2");
2261                 break;
2262         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_3:
2263                 strcpy(additional_notice, "ERL0, U3");
2264                 break;
2265         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_4:
2266                 strcpy(additional_notice, "ERL0, U4");
2267                 break;
2268         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_5:
2269                 strcpy(additional_notice, "ERL0, U5");
2270                 break;
2271         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_6:
2272                 strcpy(additional_notice, "ERL0, U6");
2273                 break;
2274         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REMAIN_RCV_LEN:
2275                 strcpy(additional_notice, "invalid resi len");
2276                 break;
2277         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_MAX_RCV_PDU_LEN:
2278                 strcpy(additional_notice, "MRDSL violation");
2279                 break;
2280         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_F_BIT_ZERO:
2281                 strcpy(additional_notice, "F-bit not set");
2282                 break;
2283         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_NOT_RSRV:
2284                 strcpy(additional_notice, "invalid TTT");
2285                 break;
2286         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DATASN:
2287                 strcpy(additional_notice, "invalid DataSN");
2288                 break;
2289         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REMAIN_BURST_LEN:
2290                 strcpy(additional_notice, "burst len violation");
2291                 break;
2292         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_BUFFER_OFF:
2293                 strcpy(additional_notice, "buf offset violation");
2294                 break;
2295         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_LUN:
2296                 strcpy(additional_notice, "invalid LUN field");
2297                 break;
2298         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_R2TSN:
2299                 strcpy(additional_notice, "invalid R2TSN field");
2300                 break;
2301 #define BNX2I_ERR_DESIRED_DATA_TRNS_LEN_0       \
2302         ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_0
2303         case BNX2I_ERR_DESIRED_DATA_TRNS_LEN_0:
2304                 strcpy(additional_notice, "invalid cmd len1");
2305                 break;
2306 #define BNX2I_ERR_DESIRED_DATA_TRNS_LEN_1       \
2307         ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_1
2308         case BNX2I_ERR_DESIRED_DATA_TRNS_LEN_1:
2309                 strcpy(additional_notice, "invalid cmd len2");
2310                 break;
2311         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T_EXCEED:
2312                 strcpy(additional_notice,
2313                        "pend r2t exceeds MaxOutstandingR2T value");
2314                 break;
2315         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_IS_RSRV:
2316                 strcpy(additional_notice, "TTT is rsvd");
2317                 break;
2318         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_MAX_BURST_LEN:
2319                 strcpy(additional_notice, "MBL violation");
2320                 break;
2321 #define BNX2I_ERR_DATA_SEG_LEN_NOT_ZERO         \
2322         ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DATA_SEG_LEN_NOT_ZERO
2323         case BNX2I_ERR_DATA_SEG_LEN_NOT_ZERO:
2324                 strcpy(additional_notice, "data seg len != 0");
2325                 break;
2326         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REJECT_PDU_LEN:
2327                 strcpy(additional_notice, "reject pdu len error");
2328                 break;
2329         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_ASYNC_PDU_LEN:
2330                 strcpy(additional_notice, "async pdu len error");
2331                 break;
2332         case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_NOPIN_PDU_LEN:
2333                 strcpy(additional_notice, "nopin pdu len error");
2334                 break;
2335 #define BNX2_ERR_PEND_R2T_IN_CLEANUP                    \
2336         ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T_IN_CLEANUP
2337         case BNX2_ERR_PEND_R2T_IN_CLEANUP:
2338                 strcpy(additional_notice, "pend r2t in cleanup");
2339                 break;
2340
2341         case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_IP_FRAGMENT:
2342                 strcpy(additional_notice, "IP fragments rcvd");
2343                 break;
2344         case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_IP_OPTIONS:
2345                 strcpy(additional_notice, "IP options error");
2346                 break;
2347         case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_URGENT_FLAG:
2348                 strcpy(additional_notice, "urgent flag error");
2349                 break;
2350         default:
2351                 printk(KERN_ALERT "iscsi_err - unknown err %x\n",
2352                                   iscsi_err->completion_status);
2353         }
2354
2355         if (need_recovery) {
2356                 iscsi_conn_printk(KERN_ALERT,
2357                                   bnx2i_conn->cls_conn->dd_data,
2358                                   "bnx2i: %s - %s\n",
2359                                   message, additional_notice);
2360
2361                 iscsi_conn_printk(KERN_ALERT,
2362                                   bnx2i_conn->cls_conn->dd_data,
2363                                   "conn_err - hostno %d conn %p, "
2364                                   "iscsi_cid %x cid %x\n",
2365                                   bnx2i_conn->hba->shost->host_no,
2366                                   bnx2i_conn, bnx2i_conn->ep->ep_iscsi_cid,
2367                                   bnx2i_conn->ep->ep_cid);
2368                 bnx2i_recovery_que_add_conn(bnx2i_conn->hba, bnx2i_conn);
2369         } else
2370                 if (!test_and_set_bit(iscsi_err->completion_status,
2371                                       (void *) &bnx2i_conn->violation_notified))
2372                         iscsi_conn_printk(KERN_ALERT,
2373                                           bnx2i_conn->cls_conn->dd_data,
2374                                           "bnx2i: %s - %s\n",
2375                                           message, additional_notice);
2376 }
2377
2378
2379 /**
2380  * bnx2i_process_conn_destroy_cmpl - process iscsi conn destroy completion
2381  * @hba:                adapter structure pointer
2382  * @conn_destroy:       conn destroy kcqe pointer
2383  *
2384  * handles connection destroy completion request.
2385  */
2386 static void bnx2i_process_conn_destroy_cmpl(struct bnx2i_hba *hba,
2387                                             struct iscsi_kcqe *conn_destroy)
2388 {
2389         struct bnx2i_endpoint *ep;
2390
2391         ep = bnx2i_find_ep_in_destroy_list(hba, conn_destroy->iscsi_conn_id);
2392         if (!ep) {
2393                 printk(KERN_ALERT "bnx2i_conn_destroy_cmpl: no pending "
2394                                   "offload request, unexpected complection\n");
2395                 return;
2396         }
2397
2398         if (hba != ep->hba) {
2399                 printk(KERN_ALERT "conn destroy- error hba mis-match\n");
2400                 return;
2401         }
2402
2403         if (conn_destroy->completion_status) {
2404                 printk(KERN_ALERT "conn_destroy_cmpl: op failed\n");
2405                 ep->state = EP_STATE_CLEANUP_FAILED;
2406         } else
2407                 ep->state = EP_STATE_CLEANUP_CMPL;
2408         wake_up_interruptible(&ep->ofld_wait);
2409 }
2410
2411
2412 /**
2413  * bnx2i_process_ofld_cmpl - process initial iscsi conn offload completion
2414  * @hba:                adapter structure pointer
2415  * @ofld_kcqe:          conn offload kcqe pointer
2416  *
2417  * handles initial connection offload completion, ep_connect() thread is
2418  *      woken-up to continue with LLP connect process
2419  */
2420 static void bnx2i_process_ofld_cmpl(struct bnx2i_hba *hba,
2421                                     struct iscsi_kcqe *ofld_kcqe)
2422 {
2423         u32 cid_addr;
2424         struct bnx2i_endpoint *ep;
2425         u32 cid_num;
2426
2427         ep = bnx2i_find_ep_in_ofld_list(hba, ofld_kcqe->iscsi_conn_id);
2428         if (!ep) {
2429                 printk(KERN_ALERT "ofld_cmpl: no pend offload request\n");
2430                 return;
2431         }
2432
2433         if (hba != ep->hba) {
2434                 printk(KERN_ALERT "ofld_cmpl: error hba mis-match\n");
2435                 return;
2436         }
2437
2438         if (ofld_kcqe->completion_status) {
2439                 ep->state = EP_STATE_OFLD_FAILED;
2440                 if (ofld_kcqe->completion_status ==
2441                     ISCSI_KCQE_COMPLETION_STATUS_CTX_ALLOC_FAILURE)
2442                         printk(KERN_ALERT "bnx2i (%s): ofld1 cmpl - unable "
2443                                 "to allocate iSCSI context resources\n",
2444                                 hba->netdev->name);
2445                 else if (ofld_kcqe->completion_status ==
2446                          ISCSI_KCQE_COMPLETION_STATUS_INVALID_OPCODE)
2447                         printk(KERN_ALERT "bnx2i (%s): ofld1 cmpl - invalid "
2448                                 "opcode\n", hba->netdev->name);
2449                 else if (ofld_kcqe->completion_status ==
2450                          ISCSI_KCQE_COMPLETION_STATUS_CID_BUSY)
2451                         /* error status code valid only for 5771x chipset */
2452                         ep->state = EP_STATE_OFLD_FAILED_CID_BUSY;
2453                 else
2454                         printk(KERN_ALERT "bnx2i (%s): ofld1 cmpl - invalid "
2455                                 "error code %d\n", hba->netdev->name,
2456                                 ofld_kcqe->completion_status);
2457         } else {
2458                 ep->state = EP_STATE_OFLD_COMPL;
2459                 cid_addr = ofld_kcqe->iscsi_conn_context_id;
2460                 cid_num = bnx2i_get_cid_num(ep);
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  * @hba:                adapter structure pointer
2470  * @update_kcqe:        kcqe pointer
2471  *
2472  * Generic KCQ event handler/dispatcher
2473  */
2474 static void bnx2i_indicate_kcqe(void *context, struct kcqe *kcqe[],
2475                                 u32 num_cqe)
2476 {
2477         struct bnx2i_hba *hba = context;
2478         int i = 0;
2479         struct iscsi_kcqe *ikcqe = NULL;
2480
2481         while (i < num_cqe) {
2482                 ikcqe = (struct iscsi_kcqe *) kcqe[i++];
2483
2484                 if (ikcqe->op_code ==
2485                     ISCSI_KCQE_OPCODE_CQ_EVENT_NOTIFICATION)
2486                         bnx2i_fastpath_notification(hba, ikcqe);
2487                 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_OFFLOAD_CONN)
2488                         bnx2i_process_ofld_cmpl(hba, ikcqe);
2489                 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_UPDATE_CONN)
2490                         bnx2i_process_update_conn_cmpl(hba, ikcqe);
2491                 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_INIT) {
2492                         if (ikcqe->completion_status !=
2493                             ISCSI_KCQE_COMPLETION_STATUS_SUCCESS)
2494                                 bnx2i_iscsi_license_error(hba, ikcqe->\
2495                                                           completion_status);
2496                         else {
2497                                 set_bit(ADAPTER_STATE_UP, &hba->adapter_state);
2498                                 bnx2i_get_link_state(hba);
2499                                 printk(KERN_INFO "bnx2i [%.2x:%.2x.%.2x]: "
2500                                                  "ISCSI_INIT passed\n",
2501                                                  (u8)hba->pcidev->bus->number,
2502                                                  hba->pci_devno,
2503                                                  (u8)hba->pci_func);
2504
2505
2506                         }
2507                 } else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_DESTROY_CONN)
2508                         bnx2i_process_conn_destroy_cmpl(hba, ikcqe);
2509                 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_ISCSI_ERROR)
2510                         bnx2i_process_iscsi_error(hba, ikcqe);
2511                 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_TCP_ERROR)
2512                         bnx2i_process_tcp_error(hba, ikcqe);
2513                 else
2514                         printk(KERN_ALERT "bnx2i: unknown opcode 0x%x\n",
2515                                           ikcqe->op_code);
2516         }
2517 }
2518
2519
2520 /**
2521  * bnx2i_indicate_netevent - Generic netdev event handler
2522  * @context:    adapter structure pointer
2523  * @event:      event type
2524  * @vlan_id:    vlans id - associated vlan id with this event
2525  *
2526  * Handles four netdev events, NETDEV_UP, NETDEV_DOWN,
2527  *      NETDEV_GOING_DOWN and NETDEV_CHANGE
2528  */
2529 static void bnx2i_indicate_netevent(void *context, unsigned long event,
2530                                     u16 vlan_id)
2531 {
2532         struct bnx2i_hba *hba = context;
2533
2534         /* Ignore all netevent coming from vlans */
2535         if (vlan_id != 0)
2536                 return;
2537
2538         switch (event) {
2539         case NETDEV_UP:
2540                 if (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state))
2541                         bnx2i_send_fw_iscsi_init_msg(hba);
2542                 break;
2543         case NETDEV_DOWN:
2544                 clear_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state);
2545                 clear_bit(ADAPTER_STATE_UP, &hba->adapter_state);
2546                 break;
2547         case NETDEV_GOING_DOWN:
2548                 set_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state);
2549                 iscsi_host_for_each_session(hba->shost,
2550                                             bnx2i_drop_session);
2551                 break;
2552         case NETDEV_CHANGE:
2553                 bnx2i_get_link_state(hba);
2554                 break;
2555         default:
2556                 ;
2557         }
2558 }
2559
2560
2561 /**
2562  * bnx2i_cm_connect_cmpl - process iscsi conn establishment completion
2563  * @cm_sk:              cnic sock structure pointer
2564  *
2565  * function callback exported via bnx2i - cnic driver interface to
2566  *      indicate completion of option-2 TCP connect request.
2567  */
2568 static void bnx2i_cm_connect_cmpl(struct cnic_sock *cm_sk)
2569 {
2570         struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2571
2572         if (test_bit(ADAPTER_STATE_GOING_DOWN, &ep->hba->adapter_state))
2573                 ep->state = EP_STATE_CONNECT_FAILED;
2574         else if (test_bit(SK_F_OFFLD_COMPLETE, &cm_sk->flags))
2575                 ep->state = EP_STATE_CONNECT_COMPL;
2576         else
2577                 ep->state = EP_STATE_CONNECT_FAILED;
2578
2579         wake_up_interruptible(&ep->ofld_wait);
2580 }
2581
2582
2583 /**
2584  * bnx2i_cm_close_cmpl - process tcp conn close completion
2585  * @cm_sk:      cnic sock structure pointer
2586  *
2587  * function callback exported via bnx2i - cnic driver interface to
2588  *      indicate completion of option-2 graceful TCP connect shutdown
2589  */
2590 static void bnx2i_cm_close_cmpl(struct cnic_sock *cm_sk)
2591 {
2592         struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2593
2594         ep->state = EP_STATE_DISCONN_COMPL;
2595         wake_up_interruptible(&ep->ofld_wait);
2596 }
2597
2598
2599 /**
2600  * bnx2i_cm_abort_cmpl - process abortive tcp conn teardown completion
2601  * @cm_sk:      cnic sock structure pointer
2602  *
2603  * function callback exported via bnx2i - cnic driver interface to
2604  *      indicate completion of option-2 abortive TCP connect termination
2605  */
2606 static void bnx2i_cm_abort_cmpl(struct cnic_sock *cm_sk)
2607 {
2608         struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2609
2610         ep->state = EP_STATE_DISCONN_COMPL;
2611         wake_up_interruptible(&ep->ofld_wait);
2612 }
2613
2614
2615 /**
2616  * bnx2i_cm_remote_close - process received TCP FIN
2617  * @hba:                adapter structure pointer
2618  * @update_kcqe:        kcqe pointer
2619  *
2620  * function callback exported via bnx2i - cnic driver interface to indicate
2621  *      async TCP events such as FIN
2622  */
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  * @hba:                adapter structure pointer
2635  * @update_kcqe:        kcqe pointer
2636  *
2637  * function callback exported via bnx2i - cnic driver interface to
2638  *      indicate async TCP events (RST) sent by the peer.
2639  */
2640 static void bnx2i_cm_remote_abort(struct cnic_sock *cm_sk)
2641 {
2642         struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2643         u32 old_state = ep->state;
2644
2645         ep->state = EP_STATE_TCP_RST_RCVD;
2646         if (old_state == EP_STATE_DISCONN_START)
2647                 wake_up_interruptible(&ep->ofld_wait);
2648         else
2649                 if (ep->conn)
2650                         bnx2i_recovery_que_add_conn(ep->hba, ep->conn);
2651 }
2652
2653
2654 static int bnx2i_send_nl_mesg(void *context, u32 msg_type,
2655                               char *buf, u16 buflen)
2656 {
2657         struct bnx2i_hba *hba = context;
2658         int rc;
2659
2660         if (!hba)
2661                 return -ENODEV;
2662
2663         rc = iscsi_offload_mesg(hba->shost, &bnx2i_iscsi_transport,
2664                                 msg_type, buf, buflen);
2665         if (rc)
2666                 printk(KERN_ALERT "bnx2i: private nl message send error\n");
2667
2668         return rc;
2669 }
2670
2671
2672 /**
2673  * bnx2i_cnic_cb - global template of bnx2i - cnic driver interface structure
2674  *                      carrying callback function pointers
2675  *
2676  */
2677 struct cnic_ulp_ops bnx2i_cnic_cb = {
2678         .cnic_init = bnx2i_ulp_init,
2679         .cnic_exit = bnx2i_ulp_exit,
2680         .cnic_start = bnx2i_start,
2681         .cnic_stop = bnx2i_stop,
2682         .indicate_kcqes = bnx2i_indicate_kcqe,
2683         .indicate_netevent = bnx2i_indicate_netevent,
2684         .cm_connect_complete = bnx2i_cm_connect_cmpl,
2685         .cm_close_complete = bnx2i_cm_close_cmpl,
2686         .cm_abort_complete = bnx2i_cm_abort_cmpl,
2687         .cm_remote_close = bnx2i_cm_remote_close,
2688         .cm_remote_abort = bnx2i_cm_remote_abort,
2689         .iscsi_nl_send_msg = bnx2i_send_nl_mesg,
2690         .owner = THIS_MODULE
2691 };
2692
2693
2694 /**
2695  * bnx2i_map_ep_dbell_regs - map connection doorbell registers
2696  * @ep: bnx2i endpoint
2697  *
2698  * maps connection's SQ and RQ doorbell registers, 5706/5708/5709 hosts these
2699  *      register in BAR #0. Whereas in 57710 these register are accessed by
2700  *      mapping BAR #1
2701  */
2702 int bnx2i_map_ep_dbell_regs(struct bnx2i_endpoint *ep)
2703 {
2704         u32 cid_num;
2705         u32 reg_off;
2706         u32 first_l4l5;
2707         u32 ctx_sz;
2708         u32 config2;
2709         resource_size_t reg_base;
2710
2711         cid_num = bnx2i_get_cid_num(ep);
2712
2713         if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
2714                 reg_base = pci_resource_start(ep->hba->pcidev,
2715                                               BNX2X_DOORBELL_PCI_BAR);
2716                 reg_off = BNX2I_5771X_DBELL_PAGE_SIZE * (cid_num & 0x1FFFF) +
2717                           DPM_TRIGER_TYPE;
2718                 ep->qp.ctx_base = ioremap_nocache(reg_base + reg_off, 4);
2719                 goto arm_cq;
2720         }
2721
2722         reg_base = ep->hba->netdev->base_addr;
2723         if ((test_bit(BNX2I_NX2_DEV_5709, &ep->hba->cnic_dev_type)) &&
2724             (ep->hba->mail_queue_access == BNX2I_MQ_BIN_MODE)) {
2725                 config2 = REG_RD(ep->hba, BNX2_MQ_CONFIG2);
2726                 first_l4l5 = config2 & BNX2_MQ_CONFIG2_FIRST_L4L5;
2727                 ctx_sz = (config2 & BNX2_MQ_CONFIG2_CONT_SZ) >> 3;
2728                 if (ctx_sz)
2729                         reg_off = CTX_OFFSET + MAX_CID_CNT * MB_KERNEL_CTX_SIZE
2730                                   + BNX2I_570X_PAGE_SIZE_DEFAULT *
2731                                   (((cid_num - first_l4l5) / ctx_sz) + 256);
2732                 else
2733                         reg_off = CTX_OFFSET + (MB_KERNEL_CTX_SIZE * cid_num);
2734         } else
2735                 /* 5709 device in normal node and 5706/5708 devices */
2736                 reg_off = CTX_OFFSET + (MB_KERNEL_CTX_SIZE * cid_num);
2737
2738         ep->qp.ctx_base = ioremap_nocache(reg_base + reg_off,
2739                                           MB_KERNEL_CTX_SIZE);
2740         if (!ep->qp.ctx_base)
2741                 return -ENOMEM;
2742
2743 arm_cq:
2744         bnx2i_arm_cq_event_coalescing(ep, CNIC_ARM_CQE);
2745         return 0;
2746 }