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Linux 4.9.137
[linux/fpc-iii.git] / drivers / scsi / bnx2i / bnx2i_hwi.c
blob4ca10501647b33573af8ef917810e7c199b97e4d
1 /* bnx2i_hwi.c: QLogic NetXtreme II iSCSI driver.
2 *
3 * Copyright (c) 2006 - 2013 Broadcom Corporation
4 * Copyright (c) 2007, 2008 Red Hat, Inc. All rights reserved.
5 * Copyright (c) 2007, 2008 Mike Christie
6 * Copyright (c) 2014, QLogic Corporation
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation.
11 *
12 * Written by: Anil Veerabhadrappa (anilgv@broadcom.com)
13 * Previously Maintained by: Eddie Wai (eddie.wai@broadcom.com)
14 * Maintained by: QLogic-Storage-Upstream@qlogic.com
15 */
16
17 #include <linux/gfp.h>
18 #include <scsi/scsi_tcq.h>
19 #include <scsi/libiscsi.h>
20 #include "bnx2i.h"
21
22 DECLARE_PER_CPU(struct bnx2i_percpu_s, bnx2i_percpu);
23
24 /**
25 * bnx2i_get_cid_num - get cid from ep
26 * @ep: endpoint pointer
27 *
28 * Only applicable to 57710 family of devices
29 */
30 static u32 bnx2i_get_cid_num(struct bnx2i_endpoint *ep)
31 {
32 u32 cid;
33
34 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
35 cid = ep->ep_cid;
36 else
37 cid = GET_CID_NUM(ep->ep_cid);
38 return cid;
39 }
40
41
42 /**
43 * bnx2i_adjust_qp_size - Adjust SQ/RQ/CQ size for 57710 device type
44 * @hba: Adapter for which adjustments is to be made
45 *
46 * Only applicable to 57710 family of devices
47 */
48 static void bnx2i_adjust_qp_size(struct bnx2i_hba *hba)
49 {
50 u32 num_elements_per_pg;
51
52 if (test_bit(BNX2I_NX2_DEV_5706, &hba->cnic_dev_type) ||
53 test_bit(BNX2I_NX2_DEV_5708, &hba->cnic_dev_type) ||
54 test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type)) {
55 if (!is_power_of_2(hba->max_sqes))
56 hba->max_sqes = rounddown_pow_of_two(hba->max_sqes);
57
58 if (!is_power_of_2(hba->max_rqes))
59 hba->max_rqes = rounddown_pow_of_two(hba->max_rqes);
60 }
61
62 /* Adjust each queue size if the user selection does not
63 * yield integral num of page buffers
64 */
65 /* adjust SQ */
66 num_elements_per_pg = CNIC_PAGE_SIZE / BNX2I_SQ_WQE_SIZE;
67 if (hba->max_sqes < num_elements_per_pg)
68 hba->max_sqes = num_elements_per_pg;
69 else if (hba->max_sqes % num_elements_per_pg)
70 hba->max_sqes = (hba->max_sqes + num_elements_per_pg - 1) &
71 ~(num_elements_per_pg - 1);
72
73 /* adjust CQ */
74 num_elements_per_pg = CNIC_PAGE_SIZE / BNX2I_CQE_SIZE;
75 if (hba->max_cqes < num_elements_per_pg)
76 hba->max_cqes = num_elements_per_pg;
77 else if (hba->max_cqes % num_elements_per_pg)
78 hba->max_cqes = (hba->max_cqes + num_elements_per_pg - 1) &
79 ~(num_elements_per_pg - 1);
80
81 /* adjust RQ */
82 num_elements_per_pg = CNIC_PAGE_SIZE / BNX2I_RQ_WQE_SIZE;
83 if (hba->max_rqes < num_elements_per_pg)
84 hba->max_rqes = num_elements_per_pg;
85 else if (hba->max_rqes % num_elements_per_pg)
86 hba->max_rqes = (hba->max_rqes + num_elements_per_pg - 1) &
87 ~(num_elements_per_pg - 1);
88 }
89
90
91 /**
92 * bnx2i_get_link_state - get network interface link state
93 * @hba: adapter instance pointer
94 *
95 * updates adapter structure flag based on netdev state
96 */
97 static void bnx2i_get_link_state(struct bnx2i_hba *hba)
98 {
99 if (test_bit(__LINK_STATE_NOCARRIER, &hba->netdev->state))
100 set_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state);
101 else
102 clear_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state);
103 }
104
105
106 /**
107 * bnx2i_iscsi_license_error - displays iscsi license related error message
108 * @hba: adapter instance pointer
109 * @error_code: error classification
110 *
111 * Puts out an error log when driver is unable to offload iscsi connection
112 * due to license restrictions
113 */
114 static void bnx2i_iscsi_license_error(struct bnx2i_hba *hba, u32 error_code)
115 {
116 if (error_code == ISCSI_KCQE_COMPLETION_STATUS_ISCSI_NOT_SUPPORTED)
117 /* iSCSI offload not supported on this device */
118 printk(KERN_ERR "bnx2i: iSCSI not supported, dev=%s\n",
119 hba->netdev->name);
120 if (error_code == ISCSI_KCQE_COMPLETION_STATUS_LOM_ISCSI_NOT_ENABLED)
121 /* iSCSI offload not supported on this LOM device */
122 printk(KERN_ERR "bnx2i: LOM is not enable to "
123 "offload iSCSI connections, dev=%s\n",
124 hba->netdev->name);
125 set_bit(ADAPTER_STATE_INIT_FAILED, &hba->adapter_state);
126 }
127
128
129 /**
130 * bnx2i_arm_cq_event_coalescing - arms CQ to enable EQ notification
131 * @ep: endpoint (transport identifier) structure
132 * @action: action, ARM or DISARM. For now only ARM_CQE is used
133 *
134 * Arm'ing CQ will enable chip to generate global EQ events inorder to interrupt
135 * the driver. EQ event is generated CQ index is hit or at least 1 CQ is
136 * outstanding and on chip timer expires
137 */
138 int bnx2i_arm_cq_event_coalescing(struct bnx2i_endpoint *ep, u8 action)
139 {
140 struct bnx2i_5771x_cq_db *cq_db;
141 u16 cq_index;
142 u16 next_index = 0;
143 u32 num_active_cmds;
144
145 /* Coalesce CQ entries only on 10G devices */
146 if (!test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
147 return 0;
148
149 /* Do not update CQ DB multiple times before firmware writes
150 * '0xFFFF' to CQDB->SQN field. Deviation may cause spurious
151 * interrupts and other unwanted results
152 */
153 cq_db = (struct bnx2i_5771x_cq_db *) ep->qp.cq_pgtbl_virt;
154
155 if (action != CNIC_ARM_CQE_FP)
156 if (cq_db->sqn[0] && cq_db->sqn[0] != 0xFFFF)
157 return 0;
158
159 if (action == CNIC_ARM_CQE || action == CNIC_ARM_CQE_FP) {
160 num_active_cmds = atomic_read(&ep->num_active_cmds);
161 if (num_active_cmds <= event_coal_min)
162 next_index = 1;
163 else {
164 next_index = num_active_cmds >> ep->ec_shift;
165 if (next_index > num_active_cmds - event_coal_min)
166 next_index = num_active_cmds - event_coal_min;
167 }
168 if (!next_index)
169 next_index = 1;
170 cq_index = ep->qp.cqe_exp_seq_sn + next_index - 1;
171 if (cq_index > ep->qp.cqe_size * 2)
172 cq_index -= ep->qp.cqe_size * 2;
173 if (!cq_index)
174 cq_index = 1;
175
176 cq_db->sqn[0] = cq_index;
177 }
178 return next_index;
179 }
180
181
182 /**
183 * bnx2i_get_rq_buf - copy RQ buffer contents to driver buffer
184 * @conn: iscsi connection on which RQ event occurred
185 * @ptr: driver buffer to which RQ buffer contents is to
186 * be copied
187 * @len: length of valid data inside RQ buf
188 *
189 * Copies RQ buffer contents from shared (DMA'able) memory region to
190 * driver buffer. RQ is used to DMA unsolicitated iscsi pdu's and
191 * scsi sense info
192 */
193 void bnx2i_get_rq_buf(struct bnx2i_conn *bnx2i_conn, char *ptr, int len)
194 {
195 if (!bnx2i_conn->ep->qp.rqe_left)
196 return;
197
198 bnx2i_conn->ep->qp.rqe_left--;
199 memcpy(ptr, (u8 *) bnx2i_conn->ep->qp.rq_cons_qe, len);
200 if (bnx2i_conn->ep->qp.rq_cons_qe == bnx2i_conn->ep->qp.rq_last_qe) {
201 bnx2i_conn->ep->qp.rq_cons_qe = bnx2i_conn->ep->qp.rq_first_qe;
202 bnx2i_conn->ep->qp.rq_cons_idx = 0;
203 } else {
204 bnx2i_conn->ep->qp.rq_cons_qe++;
205 bnx2i_conn->ep->qp.rq_cons_idx++;
206 }
207 }
208
209
210 static void bnx2i_ring_577xx_doorbell(struct bnx2i_conn *conn)
211 {
212 struct bnx2i_5771x_dbell dbell;
213 u32 msg;
214
215 memset(&dbell, 0, sizeof(dbell));
216 dbell.dbell.header = (B577XX_ISCSI_CONNECTION_TYPE <<
217 B577XX_DOORBELL_HDR_CONN_TYPE_SHIFT);
218 msg = *((u32 *)&dbell);
219 /* TODO : get doorbell register mapping */
220 writel(cpu_to_le32(msg), conn->ep->qp.ctx_base);
221 }
222
223
224 /**
225 * bnx2i_put_rq_buf - Replenish RQ buffer, if required ring on chip doorbell
226 * @conn: iscsi connection on which event to post
227 * @count: number of RQ buffer being posted to chip
228 *
229 * No need to ring hardware doorbell for 57710 family of devices
230 */
231 void bnx2i_put_rq_buf(struct bnx2i_conn *bnx2i_conn, int count)
232 {
233 struct bnx2i_5771x_sq_rq_db *rq_db;
234 u16 hi_bit = (bnx2i_conn->ep->qp.rq_prod_idx & 0x8000);
235 struct bnx2i_endpoint *ep = bnx2i_conn->ep;
236
237 ep->qp.rqe_left += count;
238 ep->qp.rq_prod_idx &= 0x7FFF;
239 ep->qp.rq_prod_idx += count;
240
241 if (ep->qp.rq_prod_idx > bnx2i_conn->hba->max_rqes) {
242 ep->qp.rq_prod_idx %= bnx2i_conn->hba->max_rqes;
243 if (!hi_bit)
244 ep->qp.rq_prod_idx |= 0x8000;
245 } else
246 ep->qp.rq_prod_idx |= hi_bit;
247
248 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
249 rq_db = (struct bnx2i_5771x_sq_rq_db *) ep->qp.rq_pgtbl_virt;
250 rq_db->prod_idx = ep->qp.rq_prod_idx;
251 /* no need to ring hardware doorbell for 57710 */
252 } else {
253 writew(ep->qp.rq_prod_idx,
254 ep->qp.ctx_base + CNIC_RECV_DOORBELL);
255 }
256 mmiowb();
257 }
258
259
260 /**
261 * bnx2i_ring_sq_dbell - Ring SQ doorbell to wake-up the processing engine
262 * @conn: iscsi connection to which new SQ entries belong
263 * @count: number of SQ WQEs to post
264 *
265 * SQ DB is updated in host memory and TX Doorbell is rung for 57710 family
266 * of devices. For 5706/5708/5709 new SQ WQE count is written into the
267 * doorbell register
268 */
269 static void bnx2i_ring_sq_dbell(struct bnx2i_conn *bnx2i_conn, int count)
270 {
271 struct bnx2i_5771x_sq_rq_db *sq_db;
272 struct bnx2i_endpoint *ep = bnx2i_conn->ep;
273
274 atomic_inc(&ep->num_active_cmds);
275 wmb(); /* flush SQ WQE memory before the doorbell is rung */
276 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
277 sq_db = (struct bnx2i_5771x_sq_rq_db *) ep->qp.sq_pgtbl_virt;
278 sq_db->prod_idx = ep->qp.sq_prod_idx;
279 bnx2i_ring_577xx_doorbell(bnx2i_conn);
280 } else
281 writew(count, ep->qp.ctx_base + CNIC_SEND_DOORBELL);
282
283 mmiowb(); /* flush posted PCI writes */
284 }
285
286
287 /**
288 * bnx2i_ring_dbell_update_sq_params - update SQ driver parameters
289 * @conn: iscsi connection to which new SQ entries belong
290 * @count: number of SQ WQEs to post
291 *
292 * this routine will update SQ driver parameters and ring the doorbell
293 */
294 static void bnx2i_ring_dbell_update_sq_params(struct bnx2i_conn *bnx2i_conn,
295 int count)
296 {
297 int tmp_cnt;
298
299 if (count == 1) {
300 if (bnx2i_conn->ep->qp.sq_prod_qe ==
301 bnx2i_conn->ep->qp.sq_last_qe)
302 bnx2i_conn->ep->qp.sq_prod_qe =
303 bnx2i_conn->ep->qp.sq_first_qe;
304 else
305 bnx2i_conn->ep->qp.sq_prod_qe++;
306 } else {
307 if ((bnx2i_conn->ep->qp.sq_prod_qe + count) <=
308 bnx2i_conn->ep->qp.sq_last_qe)
309 bnx2i_conn->ep->qp.sq_prod_qe += count;
310 else {
311 tmp_cnt = bnx2i_conn->ep->qp.sq_last_qe -
312 bnx2i_conn->ep->qp.sq_prod_qe;
313 bnx2i_conn->ep->qp.sq_prod_qe =
314 &bnx2i_conn->ep->qp.sq_first_qe[count -
315 (tmp_cnt + 1)];
316 }
317 }
318 bnx2i_conn->ep->qp.sq_prod_idx += count;
319 /* Ring the doorbell */
320 bnx2i_ring_sq_dbell(bnx2i_conn, bnx2i_conn->ep->qp.sq_prod_idx);
321 }
322
323
324 /**
325 * bnx2i_send_iscsi_login - post iSCSI login request MP WQE to hardware
326 * @conn: iscsi connection
327 * @cmd: driver command structure which is requesting
328 * a WQE to sent to chip for further processing
329 *
330 * prepare and post an iSCSI Login request WQE to CNIC firmware
331 */
332 int bnx2i_send_iscsi_login(struct bnx2i_conn *bnx2i_conn,
333 struct iscsi_task *task)
334 {
335 struct bnx2i_cmd *bnx2i_cmd;
336 struct bnx2i_login_request *login_wqe;
337 struct iscsi_login_req *login_hdr;
338 u32 dword;
339
340 bnx2i_cmd = (struct bnx2i_cmd *)task->dd_data;
341 login_hdr = (struct iscsi_login_req *)task->hdr;
342 login_wqe = (struct bnx2i_login_request *)
343 bnx2i_conn->ep->qp.sq_prod_qe;
344
345 login_wqe->op_code = login_hdr->opcode;
346 login_wqe->op_attr = login_hdr->flags;
347 login_wqe->version_max = login_hdr->max_version;
348 login_wqe->version_min = login_hdr->min_version;
349 login_wqe->data_length = ntoh24(login_hdr->dlength);
350 login_wqe->isid_lo = *((u32 *) login_hdr->isid);
351 login_wqe->isid_hi = *((u16 *) login_hdr->isid + 2);
352 login_wqe->tsih = login_hdr->tsih;
353 login_wqe->itt = task->itt |
354 (ISCSI_TASK_TYPE_MPATH << ISCSI_LOGIN_REQUEST_TYPE_SHIFT);
355 login_wqe->cid = login_hdr->cid;
356
357 login_wqe->cmd_sn = be32_to_cpu(login_hdr->cmdsn);
358 login_wqe->exp_stat_sn = be32_to_cpu(login_hdr->exp_statsn);
359 login_wqe->flags = ISCSI_LOGIN_REQUEST_UPDATE_EXP_STAT_SN;
360
361 login_wqe->resp_bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_bd_dma;
362 login_wqe->resp_bd_list_addr_hi =
363 (u32) ((u64) bnx2i_conn->gen_pdu.resp_bd_dma >> 32);
364
365 dword = ((1 << ISCSI_LOGIN_REQUEST_NUM_RESP_BDS_SHIFT) |
366 (bnx2i_conn->gen_pdu.resp_buf_size <<
367 ISCSI_LOGIN_REQUEST_RESP_BUFFER_LENGTH_SHIFT));
368 login_wqe->resp_buffer = dword;
369 login_wqe->bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.req_bd_dma;
370 login_wqe->bd_list_addr_hi =
371 (u32) ((u64) bnx2i_conn->gen_pdu.req_bd_dma >> 32);
372 login_wqe->num_bds = 1;
373 login_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
374
375 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
376 return 0;
377 }
378
379 /**
380 * bnx2i_send_iscsi_tmf - post iSCSI task management request MP WQE to hardware
381 * @conn: iscsi connection
382 * @mtask: driver command structure which is requesting
383 * a WQE to sent to chip for further processing
384 *
385 * prepare and post an iSCSI Login request WQE to CNIC firmware
386 */
387 int bnx2i_send_iscsi_tmf(struct bnx2i_conn *bnx2i_conn,
388 struct iscsi_task *mtask)
389 {
390 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
391 struct iscsi_tm *tmfabort_hdr;
392 struct scsi_cmnd *ref_sc;
393 struct iscsi_task *ctask;
394 struct bnx2i_cmd *bnx2i_cmd;
395 struct bnx2i_tmf_request *tmfabort_wqe;
396 u32 dword;
397 u32 scsi_lun[2];
398
399 bnx2i_cmd = (struct bnx2i_cmd *)mtask->dd_data;
400 tmfabort_hdr = (struct iscsi_tm *)mtask->hdr;
401 tmfabort_wqe = (struct bnx2i_tmf_request *)
402 bnx2i_conn->ep->qp.sq_prod_qe;
403
404 tmfabort_wqe->op_code = tmfabort_hdr->opcode;
405 tmfabort_wqe->op_attr = tmfabort_hdr->flags;
406
407 tmfabort_wqe->itt = (mtask->itt | (ISCSI_TASK_TYPE_MPATH << 14));
408 tmfabort_wqe->reserved2 = 0;
409 tmfabort_wqe->cmd_sn = be32_to_cpu(tmfabort_hdr->cmdsn);
410
411 switch (tmfabort_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) {
412 case ISCSI_TM_FUNC_ABORT_TASK:
413 case ISCSI_TM_FUNC_TASK_REASSIGN:
414 ctask = iscsi_itt_to_task(conn, tmfabort_hdr->rtt);
415 if (!ctask || !ctask->sc)
416 /*
417 * the iscsi layer must have completed the cmd while
418 * was starting up.
419 *
420 * Note: In the case of a SCSI cmd timeout, the task's
421 * sc is still active; hence ctask->sc != 0
422 * In this case, the task must be aborted
423 */
424 return 0;
425
426 ref_sc = ctask->sc;
427 if (ref_sc->sc_data_direction == DMA_TO_DEVICE)
428 dword = (ISCSI_TASK_TYPE_WRITE <<
429 ISCSI_CMD_REQUEST_TYPE_SHIFT);
430 else
431 dword = (ISCSI_TASK_TYPE_READ <<
432 ISCSI_CMD_REQUEST_TYPE_SHIFT);
433 tmfabort_wqe->ref_itt = (dword |
434 (tmfabort_hdr->rtt & ISCSI_ITT_MASK));
435 break;
436 default:
437 tmfabort_wqe->ref_itt = RESERVED_ITT;
438 }
439 memcpy(scsi_lun, &tmfabort_hdr->lun, sizeof(struct scsi_lun));
440 tmfabort_wqe->lun[0] = be32_to_cpu(scsi_lun[0]);
441 tmfabort_wqe->lun[1] = be32_to_cpu(scsi_lun[1]);
442
443 tmfabort_wqe->ref_cmd_sn = be32_to_cpu(tmfabort_hdr->refcmdsn);
444
445 tmfabort_wqe->bd_list_addr_lo = (u32) bnx2i_conn->hba->mp_bd_dma;
446 tmfabort_wqe->bd_list_addr_hi = (u32)
447 ((u64) bnx2i_conn->hba->mp_bd_dma >> 32);
448 tmfabort_wqe->num_bds = 1;
449 tmfabort_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
450
451 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
452 return 0;
453 }
454
455 /**
456 * bnx2i_send_iscsi_text - post iSCSI text WQE to hardware
457 * @conn: iscsi connection
458 * @mtask: driver command structure which is requesting
459 * a WQE to sent to chip for further processing
460 *
461 * prepare and post an iSCSI Text request WQE to CNIC firmware
462 */
463 int bnx2i_send_iscsi_text(struct bnx2i_conn *bnx2i_conn,
464 struct iscsi_task *mtask)
465 {
466 struct bnx2i_cmd *bnx2i_cmd;
467 struct bnx2i_text_request *text_wqe;
468 struct iscsi_text *text_hdr;
469 u32 dword;
470
471 bnx2i_cmd = (struct bnx2i_cmd *)mtask->dd_data;
472 text_hdr = (struct iscsi_text *)mtask->hdr;
473 text_wqe = (struct bnx2i_text_request *) bnx2i_conn->ep->qp.sq_prod_qe;
474
475 memset(text_wqe, 0, sizeof(struct bnx2i_text_request));
476
477 text_wqe->op_code = text_hdr->opcode;
478 text_wqe->op_attr = text_hdr->flags;
479 text_wqe->data_length = ntoh24(text_hdr->dlength);
480 text_wqe->itt = mtask->itt |
481 (ISCSI_TASK_TYPE_MPATH << ISCSI_TEXT_REQUEST_TYPE_SHIFT);
482 text_wqe->ttt = be32_to_cpu(text_hdr->ttt);
483
484 text_wqe->cmd_sn = be32_to_cpu(text_hdr->cmdsn);
485
486 text_wqe->resp_bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_bd_dma;
487 text_wqe->resp_bd_list_addr_hi =
488 (u32) ((u64) bnx2i_conn->gen_pdu.resp_bd_dma >> 32);
489
490 dword = ((1 << ISCSI_TEXT_REQUEST_NUM_RESP_BDS_SHIFT) |
491 (bnx2i_conn->gen_pdu.resp_buf_size <<
492 ISCSI_TEXT_REQUEST_RESP_BUFFER_LENGTH_SHIFT));
493 text_wqe->resp_buffer = dword;
494 text_wqe->bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.req_bd_dma;
495 text_wqe->bd_list_addr_hi =
496 (u32) ((u64) bnx2i_conn->gen_pdu.req_bd_dma >> 32);
497 text_wqe->num_bds = 1;
498 text_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
499
500 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
501 return 0;
502 }
503
504
505 /**
506 * bnx2i_send_iscsi_scsicmd - post iSCSI scsicmd request WQE to hardware
507 * @conn: iscsi connection
508 * @cmd: driver command structure which is requesting
509 * a WQE to sent to chip for further processing
510 *
511 * prepare and post an iSCSI SCSI-CMD request WQE to CNIC firmware
512 */
513 int bnx2i_send_iscsi_scsicmd(struct bnx2i_conn *bnx2i_conn,
514 struct bnx2i_cmd *cmd)
515 {
516 struct bnx2i_cmd_request *scsi_cmd_wqe;
517
518 scsi_cmd_wqe = (struct bnx2i_cmd_request *)
519 bnx2i_conn->ep->qp.sq_prod_qe;
520 memcpy(scsi_cmd_wqe, &cmd->req, sizeof(struct bnx2i_cmd_request));
521 scsi_cmd_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
522
523 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
524 return 0;
525 }
526
527 /**
528 * bnx2i_send_iscsi_nopout - post iSCSI NOPOUT request WQE to hardware
529 * @conn: iscsi connection
530 * @cmd: driver command structure which is requesting
531 * a WQE to sent to chip for further processing
532 * @datap: payload buffer pointer
533 * @data_len: payload data length
534 * @unsol: indicated whether nopout pdu is unsolicited pdu or
535 * in response to target's NOPIN w/ TTT != FFFFFFFF
536 *
537 * prepare and post a nopout request WQE to CNIC firmware
538 */
539 int bnx2i_send_iscsi_nopout(struct bnx2i_conn *bnx2i_conn,
540 struct iscsi_task *task,
541 char *datap, int data_len, int unsol)
542 {
543 struct bnx2i_endpoint *ep = bnx2i_conn->ep;
544 struct bnx2i_cmd *bnx2i_cmd;
545 struct bnx2i_nop_out_request *nopout_wqe;
546 struct iscsi_nopout *nopout_hdr;
547
548 bnx2i_cmd = (struct bnx2i_cmd *)task->dd_data;
549 nopout_hdr = (struct iscsi_nopout *)task->hdr;
550 nopout_wqe = (struct bnx2i_nop_out_request *)ep->qp.sq_prod_qe;
551
552 memset(nopout_wqe, 0x00, sizeof(struct bnx2i_nop_out_request));
553
554 nopout_wqe->op_code = nopout_hdr->opcode;
555 nopout_wqe->op_attr = ISCSI_FLAG_CMD_FINAL;
556 memcpy(nopout_wqe->lun, &nopout_hdr->lun, 8);
557
558 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
559 u32 tmp = nopout_wqe->lun[0];
560 /* 57710 requires LUN field to be swapped */
561 nopout_wqe->lun[0] = nopout_wqe->lun[1];
562 nopout_wqe->lun[1] = tmp;
563 }
564
565 nopout_wqe->itt = ((u16)task->itt |
566 (ISCSI_TASK_TYPE_MPATH <<
567 ISCSI_TMF_REQUEST_TYPE_SHIFT));
568 nopout_wqe->ttt = be32_to_cpu(nopout_hdr->ttt);
569 nopout_wqe->flags = 0;
570 if (!unsol)
571 nopout_wqe->flags = ISCSI_NOP_OUT_REQUEST_LOCAL_COMPLETION;
572 else if (nopout_hdr->itt == RESERVED_ITT)
573 nopout_wqe->flags = ISCSI_NOP_OUT_REQUEST_LOCAL_COMPLETION;
574
575 nopout_wqe->cmd_sn = be32_to_cpu(nopout_hdr->cmdsn);
576 nopout_wqe->data_length = data_len;
577 if (data_len) {
578 /* handle payload data, not required in first release */
579 printk(KERN_ALERT "NOPOUT: WARNING!! payload len != 0\n");
580 } else {
581 nopout_wqe->bd_list_addr_lo = (u32)
582 bnx2i_conn->hba->mp_bd_dma;
583 nopout_wqe->bd_list_addr_hi =
584 (u32) ((u64) bnx2i_conn->hba->mp_bd_dma >> 32);
585 nopout_wqe->num_bds = 1;
586 }
587 nopout_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
588
589 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
590 return 0;
591 }
592
593
594 /**
595 * bnx2i_send_iscsi_logout - post iSCSI logout request WQE to hardware
596 * @conn: iscsi connection
597 * @cmd: driver command structure which is requesting
598 * a WQE to sent to chip for further processing
599 *
600 * prepare and post logout request WQE to CNIC firmware
601 */
602 int bnx2i_send_iscsi_logout(struct bnx2i_conn *bnx2i_conn,
603 struct iscsi_task *task)
604 {
605 struct bnx2i_cmd *bnx2i_cmd;
606 struct bnx2i_logout_request *logout_wqe;
607 struct iscsi_logout *logout_hdr;
608
609 bnx2i_cmd = (struct bnx2i_cmd *)task->dd_data;
610 logout_hdr = (struct iscsi_logout *)task->hdr;
611
612 logout_wqe = (struct bnx2i_logout_request *)
613 bnx2i_conn->ep->qp.sq_prod_qe;
614 memset(logout_wqe, 0x00, sizeof(struct bnx2i_logout_request));
615
616 logout_wqe->op_code = logout_hdr->opcode;
617 logout_wqe->cmd_sn = be32_to_cpu(logout_hdr->cmdsn);
618 logout_wqe->op_attr =
619 logout_hdr->flags | ISCSI_LOGOUT_REQUEST_ALWAYS_ONE;
620 logout_wqe->itt = ((u16)task->itt |
621 (ISCSI_TASK_TYPE_MPATH <<
622 ISCSI_LOGOUT_REQUEST_TYPE_SHIFT));
623 logout_wqe->data_length = 0;
624 logout_wqe->cid = 0;
625
626 logout_wqe->bd_list_addr_lo = (u32) bnx2i_conn->hba->mp_bd_dma;
627 logout_wqe->bd_list_addr_hi = (u32)
628 ((u64) bnx2i_conn->hba->mp_bd_dma >> 32);
629 logout_wqe->num_bds = 1;
630 logout_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
631
632 bnx2i_conn->ep->state = EP_STATE_LOGOUT_SENT;
633
634 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
635 return 0;
636 }
637
638
639 /**
640 * bnx2i_update_iscsi_conn - post iSCSI logout request WQE to hardware
641 * @conn: iscsi connection which requires iscsi parameter update
642 *
643 * sends down iSCSI Conn Update request to move iSCSI conn to FFP
644 */
645 void bnx2i_update_iscsi_conn(struct iscsi_conn *conn)
646 {
647 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
648 struct bnx2i_hba *hba = bnx2i_conn->hba;
649 struct kwqe *kwqe_arr[2];
650 struct iscsi_kwqe_conn_update *update_wqe;
651 struct iscsi_kwqe_conn_update conn_update_kwqe;
652
653 update_wqe = &conn_update_kwqe;
654
655 update_wqe->hdr.op_code = ISCSI_KWQE_OPCODE_UPDATE_CONN;
656 update_wqe->hdr.flags =
657 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
658
659 /* 5771x requires conn context id to be passed as is */
660 if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_conn->ep->hba->cnic_dev_type))
661 update_wqe->context_id = bnx2i_conn->ep->ep_cid;
662 else
663 update_wqe->context_id = (bnx2i_conn->ep->ep_cid >> 7);
664 update_wqe->conn_flags = 0;
665 if (conn->hdrdgst_en)
666 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_HEADER_DIGEST;
667 if (conn->datadgst_en)
668 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_DATA_DIGEST;
669 if (conn->session->initial_r2t_en)
670 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_INITIAL_R2T;
671 if (conn->session->imm_data_en)
672 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_IMMEDIATE_DATA;
673
674 update_wqe->max_send_pdu_length = conn->max_xmit_dlength;
675 update_wqe->max_recv_pdu_length = conn->max_recv_dlength;
676 update_wqe->first_burst_length = conn->session->first_burst;
677 update_wqe->max_burst_length = conn->session->max_burst;
678 update_wqe->exp_stat_sn = conn->exp_statsn;
679 update_wqe->max_outstanding_r2ts = conn->session->max_r2t;
680 update_wqe->session_error_recovery_level = conn->session->erl;
681 iscsi_conn_printk(KERN_ALERT, conn,
682 "bnx2i: conn update - MBL 0x%x FBL 0x%x"
683 "MRDSL_I 0x%x MRDSL_T 0x%x \n",
684 update_wqe->max_burst_length,
685 update_wqe->first_burst_length,
686 update_wqe->max_recv_pdu_length,
687 update_wqe->max_send_pdu_length);
688
689 kwqe_arr[0] = (struct kwqe *) update_wqe;
690 if (hba->cnic && hba->cnic->submit_kwqes)
691 hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 1);
692 }
693
694
695 /**
696 * bnx2i_ep_ofld_timer - post iSCSI logout request WQE to hardware
697 * @data: endpoint (transport handle) structure pointer
698 *
699 * routine to handle connection offload/destroy request timeout
700 */
701 void bnx2i_ep_ofld_timer(unsigned long data)
702 {
703 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) data;
704
705 if (ep->state == EP_STATE_OFLD_START) {
706 printk(KERN_ALERT "ofld_timer: CONN_OFLD timeout\n");
707 ep->state = EP_STATE_OFLD_FAILED;
708 } else if (ep->state == EP_STATE_DISCONN_START) {
709 printk(KERN_ALERT "ofld_timer: CONN_DISCON timeout\n");
710 ep->state = EP_STATE_DISCONN_TIMEDOUT;
711 } else if (ep->state == EP_STATE_CLEANUP_START) {
712 printk(KERN_ALERT "ofld_timer: CONN_CLEANUP timeout\n");
713 ep->state = EP_STATE_CLEANUP_FAILED;
714 }
715
716 wake_up_interruptible(&ep->ofld_wait);
717 }
718
719
720 static int bnx2i_power_of2(u32 val)
721 {
722 u32 power = 0;
723 if (val & (val - 1))
724 return power;
725 val--;
726 while (val) {
727 val = val >> 1;
728 power++;
729 }
730 return power;
731 }
732
733
734 /**
735 * bnx2i_send_cmd_cleanup_req - send iscsi cmd context clean-up request
736 * @hba: adapter structure pointer
737 * @cmd: driver command structure which is requesting
738 * a WQE to sent to chip for further processing
739 *
740 * prepares and posts CONN_OFLD_REQ1/2 KWQE
741 */
742 void bnx2i_send_cmd_cleanup_req(struct bnx2i_hba *hba, struct bnx2i_cmd *cmd)
743 {
744 struct bnx2i_cleanup_request *cmd_cleanup;
745
746 cmd_cleanup =
747 (struct bnx2i_cleanup_request *)cmd->conn->ep->qp.sq_prod_qe;
748 memset(cmd_cleanup, 0x00, sizeof(struct bnx2i_cleanup_request));
749
750 cmd_cleanup->op_code = ISCSI_OPCODE_CLEANUP_REQUEST;
751 cmd_cleanup->itt = cmd->req.itt;
752 cmd_cleanup->cq_index = 0; /* CQ# used for completion, 5771x only */
753
754 bnx2i_ring_dbell_update_sq_params(cmd->conn, 1);
755 }
756
757
758 /**
759 * bnx2i_send_conn_destroy - initiates iscsi connection teardown process
760 * @hba: adapter structure pointer
761 * @ep: endpoint (transport identifier) structure
762 *
763 * this routine prepares and posts CONN_OFLD_REQ1/2 KWQE to initiate
764 * iscsi connection context clean-up process
765 */
766 int bnx2i_send_conn_destroy(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
767 {
768 struct kwqe *kwqe_arr[2];
769 struct iscsi_kwqe_conn_destroy conn_cleanup;
770 int rc = -EINVAL;
771
772 memset(&conn_cleanup, 0x00, sizeof(struct iscsi_kwqe_conn_destroy));
773
774 conn_cleanup.hdr.op_code = ISCSI_KWQE_OPCODE_DESTROY_CONN;
775 conn_cleanup.hdr.flags =
776 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
777 /* 5771x requires conn context id to be passed as is */
778 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
779 conn_cleanup.context_id = ep->ep_cid;
780 else
781 conn_cleanup.context_id = (ep->ep_cid >> 7);
782
783 conn_cleanup.reserved0 = (u16)ep->ep_iscsi_cid;
784
785 kwqe_arr[0] = (struct kwqe *) &conn_cleanup;
786 if (hba->cnic && hba->cnic->submit_kwqes)
787 rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 1);
788
789 return rc;
790 }
791
792
793 /**
794 * bnx2i_570x_send_conn_ofld_req - initiates iscsi conn context setup process
795 * @hba: adapter structure pointer
796 * @ep: endpoint (transport identifier) structure
797 *
798 * 5706/5708/5709 specific - prepares and posts CONN_OFLD_REQ1/2 KWQE
799 */
800 static int bnx2i_570x_send_conn_ofld_req(struct bnx2i_hba *hba,
801 struct bnx2i_endpoint *ep)
802 {
803 struct kwqe *kwqe_arr[2];
804 struct iscsi_kwqe_conn_offload1 ofld_req1;
805 struct iscsi_kwqe_conn_offload2 ofld_req2;
806 dma_addr_t dma_addr;
807 int num_kwqes = 2;
808 u32 *ptbl;
809 int rc = -EINVAL;
810
811 ofld_req1.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN1;
812 ofld_req1.hdr.flags =
813 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
814
815 ofld_req1.iscsi_conn_id = (u16) ep->ep_iscsi_cid;
816
817 dma_addr = ep->qp.sq_pgtbl_phys;
818 ofld_req1.sq_page_table_addr_lo = (u32) dma_addr;
819 ofld_req1.sq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
820
821 dma_addr = ep->qp.cq_pgtbl_phys;
822 ofld_req1.cq_page_table_addr_lo = (u32) dma_addr;
823 ofld_req1.cq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
824
825 ofld_req2.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN2;
826 ofld_req2.hdr.flags =
827 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
828
829 dma_addr = ep->qp.rq_pgtbl_phys;
830 ofld_req2.rq_page_table_addr_lo = (u32) dma_addr;
831 ofld_req2.rq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
832
833 ptbl = (u32 *) ep->qp.sq_pgtbl_virt;
834
835 ofld_req2.sq_first_pte.hi = *ptbl++;
836 ofld_req2.sq_first_pte.lo = *ptbl;
837
838 ptbl = (u32 *) ep->qp.cq_pgtbl_virt;
839 ofld_req2.cq_first_pte.hi = *ptbl++;
840 ofld_req2.cq_first_pte.lo = *ptbl;
841
842 kwqe_arr[0] = (struct kwqe *) &ofld_req1;
843 kwqe_arr[1] = (struct kwqe *) &ofld_req2;
844 ofld_req2.num_additional_wqes = 0;
845
846 if (hba->cnic && hba->cnic->submit_kwqes)
847 rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, num_kwqes);
848
849 return rc;
850 }
851
852
853 /**
854 * bnx2i_5771x_send_conn_ofld_req - initiates iscsi connection context creation
855 * @hba: adapter structure pointer
856 * @ep: endpoint (transport identifier) structure
857 *
858 * 57710 specific - prepares and posts CONN_OFLD_REQ1/2 KWQE
859 */
860 static int bnx2i_5771x_send_conn_ofld_req(struct bnx2i_hba *hba,
861 struct bnx2i_endpoint *ep)
862 {
863 struct kwqe *kwqe_arr[5];
864 struct iscsi_kwqe_conn_offload1 ofld_req1;
865 struct iscsi_kwqe_conn_offload2 ofld_req2;
866 struct iscsi_kwqe_conn_offload3 ofld_req3[1];
867 dma_addr_t dma_addr;
868 int num_kwqes = 2;
869 u32 *ptbl;
870 int rc = -EINVAL;
871
872 ofld_req1.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN1;
873 ofld_req1.hdr.flags =
874 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
875
876 ofld_req1.iscsi_conn_id = (u16) ep->ep_iscsi_cid;
877
878 dma_addr = ep->qp.sq_pgtbl_phys + ISCSI_SQ_DB_SIZE;
879 ofld_req1.sq_page_table_addr_lo = (u32) dma_addr;
880 ofld_req1.sq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
881
882 dma_addr = ep->qp.cq_pgtbl_phys + ISCSI_CQ_DB_SIZE;
883 ofld_req1.cq_page_table_addr_lo = (u32) dma_addr;
884 ofld_req1.cq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
885
886 ofld_req2.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN2;
887 ofld_req2.hdr.flags =
888 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
889
890 dma_addr = ep->qp.rq_pgtbl_phys + ISCSI_RQ_DB_SIZE;
891 ofld_req2.rq_page_table_addr_lo = (u32) dma_addr;
892 ofld_req2.rq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
893
894 ptbl = (u32 *)((u8 *)ep->qp.sq_pgtbl_virt + ISCSI_SQ_DB_SIZE);
895 ofld_req2.sq_first_pte.hi = *ptbl++;
896 ofld_req2.sq_first_pte.lo = *ptbl;
897
898 ptbl = (u32 *)((u8 *)ep->qp.cq_pgtbl_virt + ISCSI_CQ_DB_SIZE);
899 ofld_req2.cq_first_pte.hi = *ptbl++;
900 ofld_req2.cq_first_pte.lo = *ptbl;
901
902 kwqe_arr[0] = (struct kwqe *) &ofld_req1;
903 kwqe_arr[1] = (struct kwqe *) &ofld_req2;
904
905 ofld_req2.num_additional_wqes = 1;
906 memset(ofld_req3, 0x00, sizeof(ofld_req3[0]));
907 ptbl = (u32 *)((u8 *)ep->qp.rq_pgtbl_virt + ISCSI_RQ_DB_SIZE);
908 ofld_req3[0].qp_first_pte[0].hi = *ptbl++;
909 ofld_req3[0].qp_first_pte[0].lo = *ptbl;
910
911 kwqe_arr[2] = (struct kwqe *) ofld_req3;
912 /* need if we decide to go with multiple KCQE's per conn */
913 num_kwqes += 1;
914
915 if (hba->cnic && hba->cnic->submit_kwqes)
916 rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, num_kwqes);
917
918 return rc;
919 }
920
921 /**
922 * bnx2i_send_conn_ofld_req - initiates iscsi connection context setup process
923 *
924 * @hba: adapter structure pointer
925 * @ep: endpoint (transport identifier) structure
926 *
927 * this routine prepares and posts CONN_OFLD_REQ1/2 KWQE
928 */
929 int bnx2i_send_conn_ofld_req(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
930 {
931 int rc;
932
933 if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type))
934 rc = bnx2i_5771x_send_conn_ofld_req(hba, ep);
935 else
936 rc = bnx2i_570x_send_conn_ofld_req(hba, ep);
937
938 return rc;
939 }
940
941
942 /**
943 * setup_qp_page_tables - iscsi QP page table setup function
944 * @ep: endpoint (transport identifier) structure
945 *
946 * Sets up page tables for SQ/RQ/CQ, 1G/sec (5706/5708/5709) devices requires
947 * 64-bit address in big endian format. Whereas 10G/sec (57710) requires
948 * PT in little endian format
949 */
950 static void setup_qp_page_tables(struct bnx2i_endpoint *ep)
951 {
952 int num_pages;
953 u32 *ptbl;
954 dma_addr_t page;
955 int cnic_dev_10g;
956
957 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
958 cnic_dev_10g = 1;
959 else
960 cnic_dev_10g = 0;
961
962 /* SQ page table */
963 memset(ep->qp.sq_pgtbl_virt, 0, ep->qp.sq_pgtbl_size);
964 num_pages = ep->qp.sq_mem_size / CNIC_PAGE_SIZE;
965 page = ep->qp.sq_phys;
966
967 if (cnic_dev_10g)
968 ptbl = (u32 *)((u8 *)ep->qp.sq_pgtbl_virt + ISCSI_SQ_DB_SIZE);
969 else
970 ptbl = (u32 *) ep->qp.sq_pgtbl_virt;
971 while (num_pages--) {
972 if (cnic_dev_10g) {
973 /* PTE is written in little endian format for 57710 */
974 *ptbl = (u32) page;
975 ptbl++;
976 *ptbl = (u32) ((u64) page >> 32);
977 ptbl++;
978 page += CNIC_PAGE_SIZE;
979 } else {
980 /* PTE is written in big endian format for
981 * 5706/5708/5709 devices */
982 *ptbl = (u32) ((u64) page >> 32);
983 ptbl++;
984 *ptbl = (u32) page;
985 ptbl++;
986 page += CNIC_PAGE_SIZE;
987 }
988 }
989
990 /* RQ page table */
991 memset(ep->qp.rq_pgtbl_virt, 0, ep->qp.rq_pgtbl_size);
992 num_pages = ep->qp.rq_mem_size / CNIC_PAGE_SIZE;
993 page = ep->qp.rq_phys;
994
995 if (cnic_dev_10g)
996 ptbl = (u32 *)((u8 *)ep->qp.rq_pgtbl_virt + ISCSI_RQ_DB_SIZE);
997 else
998 ptbl = (u32 *) ep->qp.rq_pgtbl_virt;
999 while (num_pages--) {
1000 if (cnic_dev_10g) {
1001 /* PTE is written in little endian format for 57710 */
1002 *ptbl = (u32) page;
1003 ptbl++;
1004 *ptbl = (u32) ((u64) page >> 32);
1005 ptbl++;
1006 page += CNIC_PAGE_SIZE;
1007 } else {
1008 /* PTE is written in big endian format for
1009 * 5706/5708/5709 devices */
1010 *ptbl = (u32) ((u64) page >> 32);
1011 ptbl++;
1012 *ptbl = (u32) page;
1013 ptbl++;
1014 page += CNIC_PAGE_SIZE;
1015 }
1016 }
1017
1018 /* CQ page table */
1019 memset(ep->qp.cq_pgtbl_virt, 0, ep->qp.cq_pgtbl_size);
1020 num_pages = ep->qp.cq_mem_size / CNIC_PAGE_SIZE;
1021 page = ep->qp.cq_phys;
1022
1023 if (cnic_dev_10g)
1024 ptbl = (u32 *)((u8 *)ep->qp.cq_pgtbl_virt + ISCSI_CQ_DB_SIZE);
1025 else
1026 ptbl = (u32 *) ep->qp.cq_pgtbl_virt;
1027 while (num_pages--) {
1028 if (cnic_dev_10g) {
1029 /* PTE is written in little endian format for 57710 */
1030 *ptbl = (u32) page;
1031 ptbl++;
1032 *ptbl = (u32) ((u64) page >> 32);
1033 ptbl++;
1034 page += CNIC_PAGE_SIZE;
1035 } else {
1036 /* PTE is written in big endian format for
1037 * 5706/5708/5709 devices */
1038 *ptbl = (u32) ((u64) page >> 32);
1039 ptbl++;
1040 *ptbl = (u32) page;
1041 ptbl++;
1042 page += CNIC_PAGE_SIZE;
1043 }
1044 }
1045 }
1046
1047
1048 /**
1049 * bnx2i_alloc_qp_resc - allocates required resources for QP.
1050 * @hba: adapter structure pointer
1051 * @ep: endpoint (transport identifier) structure
1052 *
1053 * Allocate QP (transport layer for iSCSI connection) resources, DMA'able
1054 * memory for SQ/RQ/CQ and page tables. EP structure elements such
1055 * as producer/consumer indexes/pointers, queue sizes and page table
1056 * contents are setup
1057 */
1058 int bnx2i_alloc_qp_resc(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
1059 {
1060 struct bnx2i_5771x_cq_db *cq_db;
1061
1062 ep->hba = hba;
1063 ep->conn = NULL;
1064 ep->ep_cid = ep->ep_iscsi_cid = ep->ep_pg_cid = 0;
1065
1066 /* Allocate page table memory for SQ which is page aligned */
1067 ep->qp.sq_mem_size = hba->max_sqes * BNX2I_SQ_WQE_SIZE;
1068 ep->qp.sq_mem_size =
1069 (ep->qp.sq_mem_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK;
1070 ep->qp.sq_pgtbl_size =
1071 (ep->qp.sq_mem_size / CNIC_PAGE_SIZE) * sizeof(void *);
1072 ep->qp.sq_pgtbl_size =
1073 (ep->qp.sq_pgtbl_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK;
1074
1075 ep->qp.sq_pgtbl_virt =
1076 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.sq_pgtbl_size,
1077 &ep->qp.sq_pgtbl_phys, GFP_KERNEL);
1078 if (!ep->qp.sq_pgtbl_virt) {
1079 printk(KERN_ALERT "bnx2i: unable to alloc SQ PT mem (%d)\n",
1080 ep->qp.sq_pgtbl_size);
1081 goto mem_alloc_err;
1082 }
1083
1084 /* Allocate memory area for actual SQ element */
1085 ep->qp.sq_virt =
1086 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.sq_mem_size,
1087 &ep->qp.sq_phys, GFP_KERNEL);
1088 if (!ep->qp.sq_virt) {
1089 printk(KERN_ALERT "bnx2i: unable to alloc SQ BD memory %d\n",
1090 ep->qp.sq_mem_size);
1091 goto mem_alloc_err;
1092 }
1093
1094 memset(ep->qp.sq_virt, 0x00, ep->qp.sq_mem_size);
1095 ep->qp.sq_first_qe = ep->qp.sq_virt;
1096 ep->qp.sq_prod_qe = ep->qp.sq_first_qe;
1097 ep->qp.sq_cons_qe = ep->qp.sq_first_qe;
1098 ep->qp.sq_last_qe = &ep->qp.sq_first_qe[hba->max_sqes - 1];
1099 ep->qp.sq_prod_idx = 0;
1100 ep->qp.sq_cons_idx = 0;
1101 ep->qp.sqe_left = hba->max_sqes;
1102
1103 /* Allocate page table memory for CQ which is page aligned */
1104 ep->qp.cq_mem_size = hba->max_cqes * BNX2I_CQE_SIZE;
1105 ep->qp.cq_mem_size =
1106 (ep->qp.cq_mem_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK;
1107 ep->qp.cq_pgtbl_size =
1108 (ep->qp.cq_mem_size / CNIC_PAGE_SIZE) * sizeof(void *);
1109 ep->qp.cq_pgtbl_size =
1110 (ep->qp.cq_pgtbl_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK;
1111
1112 ep->qp.cq_pgtbl_virt =
1113 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.cq_pgtbl_size,
1114 &ep->qp.cq_pgtbl_phys, GFP_KERNEL);
1115 if (!ep->qp.cq_pgtbl_virt) {
1116 printk(KERN_ALERT "bnx2i: unable to alloc CQ PT memory %d\n",
1117 ep->qp.cq_pgtbl_size);
1118 goto mem_alloc_err;
1119 }
1120
1121 /* Allocate memory area for actual CQ element */
1122 ep->qp.cq_virt =
1123 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.cq_mem_size,
1124 &ep->qp.cq_phys, GFP_KERNEL);
1125 if (!ep->qp.cq_virt) {
1126 printk(KERN_ALERT "bnx2i: unable to alloc CQ BD memory %d\n",
1127 ep->qp.cq_mem_size);
1128 goto mem_alloc_err;
1129 }
1130 memset(ep->qp.cq_virt, 0x00, ep->qp.cq_mem_size);
1131
1132 ep->qp.cq_first_qe = ep->qp.cq_virt;
1133 ep->qp.cq_prod_qe = ep->qp.cq_first_qe;
1134 ep->qp.cq_cons_qe = ep->qp.cq_first_qe;
1135 ep->qp.cq_last_qe = &ep->qp.cq_first_qe[hba->max_cqes - 1];
1136 ep->qp.cq_prod_idx = 0;
1137 ep->qp.cq_cons_idx = 0;
1138 ep->qp.cqe_left = hba->max_cqes;
1139 ep->qp.cqe_exp_seq_sn = ISCSI_INITIAL_SN;
1140 ep->qp.cqe_size = hba->max_cqes;
1141
1142 /* Invalidate all EQ CQE index, req only for 57710 */
1143 cq_db = (struct bnx2i_5771x_cq_db *) ep->qp.cq_pgtbl_virt;
1144 memset(cq_db->sqn, 0xFF, sizeof(cq_db->sqn[0]) * BNX2X_MAX_CQS);
1145
1146 /* Allocate page table memory for RQ which is page aligned */
1147 ep->qp.rq_mem_size = hba->max_rqes * BNX2I_RQ_WQE_SIZE;
1148 ep->qp.rq_mem_size =
1149 (ep->qp.rq_mem_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK;
1150 ep->qp.rq_pgtbl_size =
1151 (ep->qp.rq_mem_size / CNIC_PAGE_SIZE) * sizeof(void *);
1152 ep->qp.rq_pgtbl_size =
1153 (ep->qp.rq_pgtbl_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK;
1154
1155 ep->qp.rq_pgtbl_virt =
1156 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.rq_pgtbl_size,
1157 &ep->qp.rq_pgtbl_phys, GFP_KERNEL);
1158 if (!ep->qp.rq_pgtbl_virt) {
1159 printk(KERN_ALERT "bnx2i: unable to alloc RQ PT mem %d\n",
1160 ep->qp.rq_pgtbl_size);
1161 goto mem_alloc_err;
1162 }
1163
1164 /* Allocate memory area for actual RQ element */
1165 ep->qp.rq_virt =
1166 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.rq_mem_size,
1167 &ep->qp.rq_phys, GFP_KERNEL);
1168 if (!ep->qp.rq_virt) {
1169 printk(KERN_ALERT "bnx2i: unable to alloc RQ BD memory %d\n",
1170 ep->qp.rq_mem_size);
1171 goto mem_alloc_err;
1172 }
1173
1174 ep->qp.rq_first_qe = ep->qp.rq_virt;
1175 ep->qp.rq_prod_qe = ep->qp.rq_first_qe;
1176 ep->qp.rq_cons_qe = ep->qp.rq_first_qe;
1177 ep->qp.rq_last_qe = &ep->qp.rq_first_qe[hba->max_rqes - 1];
1178 ep->qp.rq_prod_idx = 0x8000;
1179 ep->qp.rq_cons_idx = 0;
1180 ep->qp.rqe_left = hba->max_rqes;
1181
1182 setup_qp_page_tables(ep);
1183
1184 return 0;
1185
1186 mem_alloc_err:
1187 bnx2i_free_qp_resc(hba, ep);
1188 return -ENOMEM;
1189 }
1190
1191
1192
1193 /**
1194 * bnx2i_free_qp_resc - free memory resources held by QP
1195 * @hba: adapter structure pointer
1196 * @ep: endpoint (transport identifier) structure
1197 *
1198 * Free QP resources - SQ/RQ/CQ memory and page tables.
1199 */
1200 void bnx2i_free_qp_resc(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
1201 {
1202 if (ep->qp.ctx_base) {
1203 iounmap(ep->qp.ctx_base);
1204 ep->qp.ctx_base = NULL;
1205 }
1206 /* Free SQ mem */
1207 if (ep->qp.sq_pgtbl_virt) {
1208 dma_free_coherent(&hba->pcidev->dev, ep->qp.sq_pgtbl_size,
1209 ep->qp.sq_pgtbl_virt, ep->qp.sq_pgtbl_phys);
1210 ep->qp.sq_pgtbl_virt = NULL;
1211 ep->qp.sq_pgtbl_phys = 0;
1212 }
1213 if (ep->qp.sq_virt) {
1214 dma_free_coherent(&hba->pcidev->dev, ep->qp.sq_mem_size,
1215 ep->qp.sq_virt, ep->qp.sq_phys);
1216 ep->qp.sq_virt = NULL;
1217 ep->qp.sq_phys = 0;
1218 }
1219
1220 /* Free RQ mem */
1221 if (ep->qp.rq_pgtbl_virt) {
1222 dma_free_coherent(&hba->pcidev->dev, ep->qp.rq_pgtbl_size,
1223 ep->qp.rq_pgtbl_virt, ep->qp.rq_pgtbl_phys);
1224 ep->qp.rq_pgtbl_virt = NULL;
1225 ep->qp.rq_pgtbl_phys = 0;
1226 }
1227 if (ep->qp.rq_virt) {
1228 dma_free_coherent(&hba->pcidev->dev, ep->qp.rq_mem_size,
1229 ep->qp.rq_virt, ep->qp.rq_phys);
1230 ep->qp.rq_virt = NULL;
1231 ep->qp.rq_phys = 0;
1232 }
1233
1234 /* Free CQ mem */
1235 if (ep->qp.cq_pgtbl_virt) {
1236 dma_free_coherent(&hba->pcidev->dev, ep->qp.cq_pgtbl_size,
1237 ep->qp.cq_pgtbl_virt, ep->qp.cq_pgtbl_phys);
1238 ep->qp.cq_pgtbl_virt = NULL;
1239 ep->qp.cq_pgtbl_phys = 0;
1240 }
1241 if (ep->qp.cq_virt) {
1242 dma_free_coherent(&hba->pcidev->dev, ep->qp.cq_mem_size,
1243 ep->qp.cq_virt, ep->qp.cq_phys);
1244 ep->qp.cq_virt = NULL;
1245 ep->qp.cq_phys = 0;
1246 }
1247 }
1248
1249
1250 /**
1251 * bnx2i_send_fw_iscsi_init_msg - initiates initial handshake with iscsi f/w
1252 * @hba: adapter structure pointer
1253 *
1254 * Send down iscsi_init KWQEs which initiates the initial handshake with the f/w
1255 * This results in iSCSi support validation and on-chip context manager
1256 * initialization. Firmware completes this handshake with a CQE carrying
1257 * the result of iscsi support validation. Parameter carried by
1258 * iscsi init request determines the number of offloaded connection and
1259 * tolerance level for iscsi protocol violation this hba/chip can support
1260 */
1261 int bnx2i_send_fw_iscsi_init_msg(struct bnx2i_hba *hba)
1262 {
1263 struct kwqe *kwqe_arr[3];
1264 struct iscsi_kwqe_init1 iscsi_init;
1265 struct iscsi_kwqe_init2 iscsi_init2;
1266 int rc = 0;
1267 u64 mask64;
1268
1269 memset(&iscsi_init, 0x00, sizeof(struct iscsi_kwqe_init1));
1270 memset(&iscsi_init2, 0x00, sizeof(struct iscsi_kwqe_init2));
1271
1272 bnx2i_adjust_qp_size(hba);
1273
1274 iscsi_init.flags =
1275 (CNIC_PAGE_BITS - 8) << ISCSI_KWQE_INIT1_PAGE_SIZE_SHIFT;
1276 if (en_tcp_dack)
1277 iscsi_init.flags |= ISCSI_KWQE_INIT1_DELAYED_ACK_ENABLE;
1278 iscsi_init.reserved0 = 0;
1279 iscsi_init.num_cqs = 1;
1280 iscsi_init.hdr.op_code = ISCSI_KWQE_OPCODE_INIT1;
1281 iscsi_init.hdr.flags =
1282 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
1283
1284 iscsi_init.dummy_buffer_addr_lo = (u32) hba->dummy_buf_dma;
1285 iscsi_init.dummy_buffer_addr_hi =
1286 (u32) ((u64) hba->dummy_buf_dma >> 32);
1287
1288 hba->num_ccell = hba->max_sqes >> 1;
1289 hba->ctx_ccell_tasks =
1290 ((hba->num_ccell & 0xFFFF) | (hba->max_sqes << 16));
1291 iscsi_init.num_ccells_per_conn = hba->num_ccell;
1292 iscsi_init.num_tasks_per_conn = hba->max_sqes;
1293 iscsi_init.sq_wqes_per_page = CNIC_PAGE_SIZE / BNX2I_SQ_WQE_SIZE;
1294 iscsi_init.sq_num_wqes = hba->max_sqes;
1295 iscsi_init.cq_log_wqes_per_page =
1296 (u8) bnx2i_power_of2(CNIC_PAGE_SIZE / BNX2I_CQE_SIZE);
1297 iscsi_init.cq_num_wqes = hba->max_cqes;
1298 iscsi_init.cq_num_pages = (hba->max_cqes * BNX2I_CQE_SIZE +
1299 (CNIC_PAGE_SIZE - 1)) / CNIC_PAGE_SIZE;
1300 iscsi_init.sq_num_pages = (hba->max_sqes * BNX2I_SQ_WQE_SIZE +
1301 (CNIC_PAGE_SIZE - 1)) / CNIC_PAGE_SIZE;
1302 iscsi_init.rq_buffer_size = BNX2I_RQ_WQE_SIZE;
1303 iscsi_init.rq_num_wqes = hba->max_rqes;
1304
1305
1306 iscsi_init2.hdr.op_code = ISCSI_KWQE_OPCODE_INIT2;
1307 iscsi_init2.hdr.flags =
1308 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
1309 iscsi_init2.max_cq_sqn = hba->max_cqes * 2 + 1;
1310 mask64 = 0x0ULL;
1311 mask64 |= (
1312 /* CISCO MDS */
1313 (1UL <<
1314 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_NOT_RSRV) |
1315 /* HP MSA1510i */
1316 (1UL <<
1317 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_EXP_DATASN) |
1318 /* EMC */
1319 (1ULL << ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_LUN));
1320 if (error_mask1) {
1321 iscsi_init2.error_bit_map[0] = error_mask1;
1322 mask64 ^= (u32)(mask64);
1323 mask64 |= error_mask1;
1324 } else
1325 iscsi_init2.error_bit_map[0] = (u32) mask64;
1326
1327 if (error_mask2) {
1328 iscsi_init2.error_bit_map[1] = error_mask2;
1329 mask64 &= 0xffffffff;
1330 mask64 |= ((u64)error_mask2 << 32);
1331 } else
1332 iscsi_init2.error_bit_map[1] = (u32) (mask64 >> 32);
1333
1334 iscsi_error_mask = mask64;
1335
1336 kwqe_arr[0] = (struct kwqe *) &iscsi_init;
1337 kwqe_arr[1] = (struct kwqe *) &iscsi_init2;
1338
1339 if (hba->cnic && hba->cnic->submit_kwqes)
1340 rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 2);
1341 return rc;
1342 }
1343
1344
1345 /**
1346 * bnx2i_process_scsi_cmd_resp - this function handles scsi cmd completion.
1347 * @session: iscsi session
1348 * @bnx2i_conn: bnx2i connection
1349 * @cqe: pointer to newly DMA'ed CQE entry for processing
1350 *
1351 * process SCSI CMD Response CQE & complete the request to SCSI-ML
1352 */
1353 int bnx2i_process_scsi_cmd_resp(struct iscsi_session *session,
1354 struct bnx2i_conn *bnx2i_conn,
1355 struct cqe *cqe)
1356 {
1357 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1358 struct bnx2i_hba *hba = bnx2i_conn->hba;
1359 struct bnx2i_cmd_response *resp_cqe;
1360 struct bnx2i_cmd *bnx2i_cmd;
1361 struct iscsi_task *task;
1362 struct iscsi_scsi_rsp *hdr;
1363 u32 datalen = 0;
1364
1365 resp_cqe = (struct bnx2i_cmd_response *)cqe;
1366 spin_lock_bh(&session->back_lock);
1367 task = iscsi_itt_to_task(conn,
1368 resp_cqe->itt & ISCSI_CMD_RESPONSE_INDEX);
1369 if (!task)
1370 goto fail;
1371
1372 bnx2i_cmd = task->dd_data;
1373
1374 if (bnx2i_cmd->req.op_attr & ISCSI_CMD_REQUEST_READ) {
1375 conn->datain_pdus_cnt +=
1376 resp_cqe->task_stat.read_stat.num_data_ins;
1377 conn->rxdata_octets +=
1378 bnx2i_cmd->req.total_data_transfer_length;
1379 ADD_STATS_64(hba, rx_pdus,
1380 resp_cqe->task_stat.read_stat.num_data_ins);
1381 ADD_STATS_64(hba, rx_bytes,
1382 bnx2i_cmd->req.total_data_transfer_length);
1383 } else {
1384 conn->dataout_pdus_cnt +=
1385 resp_cqe->task_stat.write_stat.num_data_outs;
1386 conn->r2t_pdus_cnt +=
1387 resp_cqe->task_stat.write_stat.num_r2ts;
1388 conn->txdata_octets +=
1389 bnx2i_cmd->req.total_data_transfer_length;
1390 ADD_STATS_64(hba, tx_pdus,
1391 resp_cqe->task_stat.write_stat.num_data_outs);
1392 ADD_STATS_64(hba, tx_bytes,
1393 bnx2i_cmd->req.total_data_transfer_length);
1394 ADD_STATS_64(hba, rx_pdus,
1395 resp_cqe->task_stat.write_stat.num_r2ts);
1396 }
1397 bnx2i_iscsi_unmap_sg_list(bnx2i_cmd);
1398
1399 hdr = (struct iscsi_scsi_rsp *)task->hdr;
1400 resp_cqe = (struct bnx2i_cmd_response *)cqe;
1401 hdr->opcode = resp_cqe->op_code;
1402 hdr->max_cmdsn = cpu_to_be32(resp_cqe->max_cmd_sn);
1403 hdr->exp_cmdsn = cpu_to_be32(resp_cqe->exp_cmd_sn);
1404 hdr->response = resp_cqe->response;
1405 hdr->cmd_status = resp_cqe->status;
1406 hdr->flags = resp_cqe->response_flags;
1407 hdr->residual_count = cpu_to_be32(resp_cqe->residual_count);
1408
1409 if (resp_cqe->op_code == ISCSI_OP_SCSI_DATA_IN)
1410 goto done;
1411
1412 if (resp_cqe->status == SAM_STAT_CHECK_CONDITION) {
1413 datalen = resp_cqe->data_length;
1414 if (datalen < 2)
1415 goto done;
1416
1417 if (datalen > BNX2I_RQ_WQE_SIZE) {
1418 iscsi_conn_printk(KERN_ERR, conn,
1419 "sense data len %d > RQ sz\n",
1420 datalen);
1421 datalen = BNX2I_RQ_WQE_SIZE;
1422 } else if (datalen > ISCSI_DEF_MAX_RECV_SEG_LEN) {
1423 iscsi_conn_printk(KERN_ERR, conn,
1424 "sense data len %d > conn data\n",
1425 datalen);
1426 datalen = ISCSI_DEF_MAX_RECV_SEG_LEN;
1427 }
1428
1429 bnx2i_get_rq_buf(bnx2i_cmd->conn, conn->data, datalen);
1430 bnx2i_put_rq_buf(bnx2i_cmd->conn, 1);
1431 }
1432
1433 done:
1434 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr,
1435 conn->data, datalen);
1436 fail:
1437 spin_unlock_bh(&session->back_lock);
1438 return 0;
1439 }
1440
1441
1442 /**
1443 * bnx2i_process_login_resp - this function handles iscsi login response
1444 * @session: iscsi session pointer
1445 * @bnx2i_conn: iscsi connection pointer
1446 * @cqe: pointer to newly DMA'ed CQE entry for processing
1447 *
1448 * process Login Response CQE & complete it to open-iscsi user daemon
1449 */
1450 static int bnx2i_process_login_resp(struct iscsi_session *session,
1451 struct bnx2i_conn *bnx2i_conn,
1452 struct cqe *cqe)
1453 {
1454 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1455 struct iscsi_task *task;
1456 struct bnx2i_login_response *login;
1457 struct iscsi_login_rsp *resp_hdr;
1458 int pld_len;
1459 int pad_len;
1460
1461 login = (struct bnx2i_login_response *) cqe;
1462 spin_lock(&session->back_lock);
1463 task = iscsi_itt_to_task(conn,
1464 login->itt & ISCSI_LOGIN_RESPONSE_INDEX);
1465 if (!task)
1466 goto done;
1467
1468 resp_hdr = (struct iscsi_login_rsp *) &bnx2i_conn->gen_pdu.resp_hdr;
1469 memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1470 resp_hdr->opcode = login->op_code;
1471 resp_hdr->flags = login->response_flags;
1472 resp_hdr->max_version = login->version_max;
1473 resp_hdr->active_version = login->version_active;
1474 resp_hdr->hlength = 0;
1475
1476 hton24(resp_hdr->dlength, login->data_length);
1477 memcpy(resp_hdr->isid, &login->isid_lo, 6);
1478 resp_hdr->tsih = cpu_to_be16(login->tsih);
1479 resp_hdr->itt = task->hdr->itt;
1480 resp_hdr->statsn = cpu_to_be32(login->stat_sn);
1481 resp_hdr->exp_cmdsn = cpu_to_be32(login->exp_cmd_sn);
1482 resp_hdr->max_cmdsn = cpu_to_be32(login->max_cmd_sn);
1483 resp_hdr->status_class = login->status_class;
1484 resp_hdr->status_detail = login->status_detail;
1485 pld_len = login->data_length;
1486 bnx2i_conn->gen_pdu.resp_wr_ptr =
1487 bnx2i_conn->gen_pdu.resp_buf + pld_len;
1488
1489 pad_len = 0;
1490 if (pld_len & 0x3)
1491 pad_len = 4 - (pld_len % 4);
1492
1493 if (pad_len) {
1494 int i = 0;
1495 for (i = 0; i < pad_len; i++) {
1496 bnx2i_conn->gen_pdu.resp_wr_ptr[0] = 0;
1497 bnx2i_conn->gen_pdu.resp_wr_ptr++;
1498 }
1499 }
1500
1501 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr,
1502 bnx2i_conn->gen_pdu.resp_buf,
1503 bnx2i_conn->gen_pdu.resp_wr_ptr - bnx2i_conn->gen_pdu.resp_buf);
1504 done:
1505 spin_unlock(&session->back_lock);
1506 return 0;
1507 }
1508
1509
1510 /**
1511 * bnx2i_process_text_resp - this function handles iscsi text response
1512 * @session: iscsi session pointer
1513 * @bnx2i_conn: iscsi connection pointer
1514 * @cqe: pointer to newly DMA'ed CQE entry for processing
1515 *
1516 * process iSCSI Text Response CQE& complete it to open-iscsi user daemon
1517 */
1518 static int bnx2i_process_text_resp(struct iscsi_session *session,
1519 struct bnx2i_conn *bnx2i_conn,
1520 struct cqe *cqe)
1521 {
1522 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1523 struct iscsi_task *task;
1524 struct bnx2i_text_response *text;
1525 struct iscsi_text_rsp *resp_hdr;
1526 int pld_len;
1527 int pad_len;
1528
1529 text = (struct bnx2i_text_response *) cqe;
1530 spin_lock(&session->back_lock);
1531 task = iscsi_itt_to_task(conn, text->itt & ISCSI_LOGIN_RESPONSE_INDEX);
1532 if (!task)
1533 goto done;
1534
1535 resp_hdr = (struct iscsi_text_rsp *)&bnx2i_conn->gen_pdu.resp_hdr;
1536 memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1537 resp_hdr->opcode = text->op_code;
1538 resp_hdr->flags = text->response_flags;
1539 resp_hdr->hlength = 0;
1540
1541 hton24(resp_hdr->dlength, text->data_length);
1542 resp_hdr->itt = task->hdr->itt;
1543 resp_hdr->ttt = cpu_to_be32(text->ttt);
1544 resp_hdr->statsn = task->hdr->exp_statsn;
1545 resp_hdr->exp_cmdsn = cpu_to_be32(text->exp_cmd_sn);
1546 resp_hdr->max_cmdsn = cpu_to_be32(text->max_cmd_sn);
1547 pld_len = text->data_length;
1548 bnx2i_conn->gen_pdu.resp_wr_ptr = bnx2i_conn->gen_pdu.resp_buf +
1549 pld_len;
1550 pad_len = 0;
1551 if (pld_len & 0x3)
1552 pad_len = 4 - (pld_len % 4);
1553
1554 if (pad_len) {
1555 int i = 0;
1556 for (i = 0; i < pad_len; i++) {
1557 bnx2i_conn->gen_pdu.resp_wr_ptr[0] = 0;
1558 bnx2i_conn->gen_pdu.resp_wr_ptr++;
1559 }
1560 }
1561 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr,
1562 bnx2i_conn->gen_pdu.resp_buf,
1563 bnx2i_conn->gen_pdu.resp_wr_ptr -
1564 bnx2i_conn->gen_pdu.resp_buf);
1565 done:
1566 spin_unlock(&session->back_lock);
1567 return 0;
1568 }
1569
1570
1571 /**
1572 * bnx2i_process_tmf_resp - this function handles iscsi TMF response
1573 * @session: iscsi session pointer
1574 * @bnx2i_conn: iscsi connection pointer
1575 * @cqe: pointer to newly DMA'ed CQE entry for processing
1576 *
1577 * process iSCSI TMF Response CQE and wake up the driver eh thread.
1578 */
1579 static int bnx2i_process_tmf_resp(struct iscsi_session *session,
1580 struct bnx2i_conn *bnx2i_conn,
1581 struct cqe *cqe)
1582 {
1583 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1584 struct iscsi_task *task;
1585 struct bnx2i_tmf_response *tmf_cqe;
1586 struct iscsi_tm_rsp *resp_hdr;
1587
1588 tmf_cqe = (struct bnx2i_tmf_response *)cqe;
1589 spin_lock(&session->back_lock);
1590 task = iscsi_itt_to_task(conn,
1591 tmf_cqe->itt & ISCSI_TMF_RESPONSE_INDEX);
1592 if (!task)
1593 goto done;
1594
1595 resp_hdr = (struct iscsi_tm_rsp *) &bnx2i_conn->gen_pdu.resp_hdr;
1596 memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1597 resp_hdr->opcode = tmf_cqe->op_code;
1598 resp_hdr->max_cmdsn = cpu_to_be32(tmf_cqe->max_cmd_sn);
1599 resp_hdr->exp_cmdsn = cpu_to_be32(tmf_cqe->exp_cmd_sn);
1600 resp_hdr->itt = task->hdr->itt;
1601 resp_hdr->response = tmf_cqe->response;
1602
1603 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0);
1604 done:
1605 spin_unlock(&session->back_lock);
1606 return 0;
1607 }
1608
1609 /**
1610 * bnx2i_process_logout_resp - this function handles iscsi logout response
1611 * @session: iscsi session pointer
1612 * @bnx2i_conn: iscsi connection pointer
1613 * @cqe: pointer to newly DMA'ed CQE entry for processing
1614 *
1615 * process iSCSI Logout Response CQE & make function call to
1616 * notify the user daemon.
1617 */
1618 static int bnx2i_process_logout_resp(struct iscsi_session *session,
1619 struct bnx2i_conn *bnx2i_conn,
1620 struct cqe *cqe)
1621 {
1622 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1623 struct iscsi_task *task;
1624 struct bnx2i_logout_response *logout;
1625 struct iscsi_logout_rsp *resp_hdr;
1626
1627 logout = (struct bnx2i_logout_response *) cqe;
1628 spin_lock(&session->back_lock);
1629 task = iscsi_itt_to_task(conn,
1630 logout->itt & ISCSI_LOGOUT_RESPONSE_INDEX);
1631 if (!task)
1632 goto done;
1633
1634 resp_hdr = (struct iscsi_logout_rsp *) &bnx2i_conn->gen_pdu.resp_hdr;
1635 memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1636 resp_hdr->opcode = logout->op_code;
1637 resp_hdr->flags = logout->response;
1638 resp_hdr->hlength = 0;
1639
1640 resp_hdr->itt = task->hdr->itt;
1641 resp_hdr->statsn = task->hdr->exp_statsn;
1642 resp_hdr->exp_cmdsn = cpu_to_be32(logout->exp_cmd_sn);
1643 resp_hdr->max_cmdsn = cpu_to_be32(logout->max_cmd_sn);
1644
1645 resp_hdr->t2wait = cpu_to_be32(logout->time_to_wait);
1646 resp_hdr->t2retain = cpu_to_be32(logout->time_to_retain);
1647
1648 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0);
1649
1650 bnx2i_conn->ep->state = EP_STATE_LOGOUT_RESP_RCVD;
1651 done:
1652 spin_unlock(&session->back_lock);
1653 return 0;
1654 }
1655
1656 /**
1657 * bnx2i_process_nopin_local_cmpl - this function handles iscsi nopin CQE
1658 * @session: iscsi session pointer
1659 * @bnx2i_conn: iscsi connection pointer
1660 * @cqe: pointer to newly DMA'ed CQE entry for processing
1661 *
1662 * process iSCSI NOPIN local completion CQE, frees IIT and command structures
1663 */
1664 static void bnx2i_process_nopin_local_cmpl(struct iscsi_session *session,
1665 struct bnx2i_conn *bnx2i_conn,
1666 struct cqe *cqe)
1667 {
1668 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1669 struct bnx2i_nop_in_msg *nop_in;
1670 struct iscsi_task *task;
1671
1672 nop_in = (struct bnx2i_nop_in_msg *)cqe;
1673 spin_lock(&session->back_lock);
1674 task = iscsi_itt_to_task(conn,
1675 nop_in->itt & ISCSI_NOP_IN_MSG_INDEX);
1676 if (task)
1677 __iscsi_put_task(task);
1678 spin_unlock(&session->back_lock);
1679 }
1680
1681 /**
1682 * bnx2i_unsol_pdu_adjust_rq - makes adjustments to RQ after unsol pdu is recvd
1683 * @conn: iscsi connection
1684 *
1685 * Firmware advances RQ producer index for every unsolicited PDU even if
1686 * payload data length is '0'. This function makes corresponding
1687 * adjustments on the driver side to match this f/w behavior
1688 */
1689 static void bnx2i_unsol_pdu_adjust_rq(struct bnx2i_conn *bnx2i_conn)
1690 {
1691 char dummy_rq_data[2];
1692 bnx2i_get_rq_buf(bnx2i_conn, dummy_rq_data, 1);
1693 bnx2i_put_rq_buf(bnx2i_conn, 1);
1694 }
1695
1696
1697 /**
1698 * bnx2i_process_nopin_mesg - this function handles iscsi nopin CQE
1699 * @session: iscsi session pointer
1700 * @bnx2i_conn: iscsi connection pointer
1701 * @cqe: pointer to newly DMA'ed CQE entry for processing
1702 *
1703 * process iSCSI target's proactive iSCSI NOPIN request
1704 */
1705 static int bnx2i_process_nopin_mesg(struct iscsi_session *session,
1706 struct bnx2i_conn *bnx2i_conn,
1707 struct cqe *cqe)
1708 {
1709 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1710 struct iscsi_task *task;
1711 struct bnx2i_nop_in_msg *nop_in;
1712 struct iscsi_nopin *hdr;
1713 int tgt_async_nop = 0;
1714
1715 nop_in = (struct bnx2i_nop_in_msg *)cqe;
1716
1717 spin_lock(&session->back_lock);
1718 hdr = (struct iscsi_nopin *)&bnx2i_conn->gen_pdu.resp_hdr;
1719 memset(hdr, 0, sizeof(struct iscsi_hdr));
1720 hdr->opcode = nop_in->op_code;
1721 hdr->max_cmdsn = cpu_to_be32(nop_in->max_cmd_sn);
1722 hdr->exp_cmdsn = cpu_to_be32(nop_in->exp_cmd_sn);
1723 hdr->ttt = cpu_to_be32(nop_in->ttt);
1724
1725 if (nop_in->itt == (u16) RESERVED_ITT) {
1726 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
1727 hdr->itt = RESERVED_ITT;
1728 tgt_async_nop = 1;
1729 goto done;
1730 }
1731
1732 /* this is a response to one of our nop-outs */
1733 task = iscsi_itt_to_task(conn,
1734 (itt_t) (nop_in->itt & ISCSI_NOP_IN_MSG_INDEX));
1735 if (task) {
1736 hdr->flags = ISCSI_FLAG_CMD_FINAL;
1737 hdr->itt = task->hdr->itt;
1738 hdr->ttt = cpu_to_be32(nop_in->ttt);
1739 memcpy(&hdr->lun, nop_in->lun, 8);
1740 }
1741 done:
1742 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, NULL, 0);
1743 spin_unlock(&session->back_lock);
1744
1745 return tgt_async_nop;
1746 }
1747
1748
1749 /**
1750 * bnx2i_process_async_mesg - this function handles iscsi async message
1751 * @session: iscsi session pointer
1752 * @bnx2i_conn: iscsi connection pointer
1753 * @cqe: pointer to newly DMA'ed CQE entry for processing
1754 *
1755 * process iSCSI ASYNC Message
1756 */
1757 static void bnx2i_process_async_mesg(struct iscsi_session *session,
1758 struct bnx2i_conn *bnx2i_conn,
1759 struct cqe *cqe)
1760 {
1761 struct bnx2i_async_msg *async_cqe;
1762 struct iscsi_async *resp_hdr;
1763 u8 async_event;
1764
1765 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
1766
1767 async_cqe = (struct bnx2i_async_msg *)cqe;
1768 async_event = async_cqe->async_event;
1769
1770 if (async_event == ISCSI_ASYNC_MSG_SCSI_EVENT) {
1771 iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data,
1772 "async: scsi events not supported\n");
1773 return;
1774 }
1775
1776 spin_lock(&session->back_lock);
1777 resp_hdr = (struct iscsi_async *) &bnx2i_conn->gen_pdu.resp_hdr;
1778 memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1779 resp_hdr->opcode = async_cqe->op_code;
1780 resp_hdr->flags = 0x80;
1781
1782 memcpy(&resp_hdr->lun, async_cqe->lun, 8);
1783 resp_hdr->exp_cmdsn = cpu_to_be32(async_cqe->exp_cmd_sn);
1784 resp_hdr->max_cmdsn = cpu_to_be32(async_cqe->max_cmd_sn);
1785
1786 resp_hdr->async_event = async_cqe->async_event;
1787 resp_hdr->async_vcode = async_cqe->async_vcode;
1788
1789 resp_hdr->param1 = cpu_to_be16(async_cqe->param1);
1790 resp_hdr->param2 = cpu_to_be16(async_cqe->param2);
1791 resp_hdr->param3 = cpu_to_be16(async_cqe->param3);
1792
1793 __iscsi_complete_pdu(bnx2i_conn->cls_conn->dd_data,
1794 (struct iscsi_hdr *)resp_hdr, NULL, 0);
1795 spin_unlock(&session->back_lock);
1796 }
1797
1798
1799 /**
1800 * bnx2i_process_reject_mesg - process iscsi reject pdu
1801 * @session: iscsi session pointer
1802 * @bnx2i_conn: iscsi connection pointer
1803 * @cqe: pointer to newly DMA'ed CQE entry for processing
1804 *
1805 * process iSCSI REJECT message
1806 */
1807 static void bnx2i_process_reject_mesg(struct iscsi_session *session,
1808 struct bnx2i_conn *bnx2i_conn,
1809 struct cqe *cqe)
1810 {
1811 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1812 struct bnx2i_reject_msg *reject;
1813 struct iscsi_reject *hdr;
1814
1815 reject = (struct bnx2i_reject_msg *) cqe;
1816 if (reject->data_length) {
1817 bnx2i_get_rq_buf(bnx2i_conn, conn->data, reject->data_length);
1818 bnx2i_put_rq_buf(bnx2i_conn, 1);
1819 } else
1820 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
1821
1822 spin_lock(&session->back_lock);
1823 hdr = (struct iscsi_reject *) &bnx2i_conn->gen_pdu.resp_hdr;
1824 memset(hdr, 0, sizeof(struct iscsi_hdr));
1825 hdr->opcode = reject->op_code;
1826 hdr->reason = reject->reason;
1827 hton24(hdr->dlength, reject->data_length);
1828 hdr->max_cmdsn = cpu_to_be32(reject->max_cmd_sn);
1829 hdr->exp_cmdsn = cpu_to_be32(reject->exp_cmd_sn);
1830 hdr->ffffffff = cpu_to_be32(RESERVED_ITT);
1831 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, conn->data,
1832 reject->data_length);
1833 spin_unlock(&session->back_lock);
1834 }
1835
1836 /**
1837 * bnx2i_process_cmd_cleanup_resp - process scsi command clean-up completion
1838 * @session: iscsi session pointer
1839 * @bnx2i_conn: iscsi connection pointer
1840 * @cqe: pointer to newly DMA'ed CQE entry for processing
1841 *
1842 * process command cleanup response CQE during conn shutdown or error recovery
1843 */
1844 static void bnx2i_process_cmd_cleanup_resp(struct iscsi_session *session,
1845 struct bnx2i_conn *bnx2i_conn,
1846 struct cqe *cqe)
1847 {
1848 struct bnx2i_cleanup_response *cmd_clean_rsp;
1849 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1850 struct iscsi_task *task;
1851
1852 cmd_clean_rsp = (struct bnx2i_cleanup_response *)cqe;
1853 spin_lock(&session->back_lock);
1854 task = iscsi_itt_to_task(conn,
1855 cmd_clean_rsp->itt & ISCSI_CLEANUP_RESPONSE_INDEX);
1856 if (!task)
1857 printk(KERN_ALERT "bnx2i: cmd clean ITT %x not active\n",
1858 cmd_clean_rsp->itt & ISCSI_CLEANUP_RESPONSE_INDEX);
1859 spin_unlock(&session->back_lock);
1860 complete(&bnx2i_conn->cmd_cleanup_cmpl);
1861 }
1862
1863
1864 /**
1865 * bnx2i_percpu_io_thread - thread per cpu for ios
1866 *
1867 * @arg: ptr to bnx2i_percpu_info structure
1868 */
1869 int bnx2i_percpu_io_thread(void *arg)
1870 {
1871 struct bnx2i_percpu_s *p = arg;
1872 struct bnx2i_work *work, *tmp;
1873 LIST_HEAD(work_list);
1874
1875 set_user_nice(current, MIN_NICE);
1876
1877 while (!kthread_should_stop()) {
1878 spin_lock_bh(&p->p_work_lock);
1879 while (!list_empty(&p->work_list)) {
1880 list_splice_init(&p->work_list, &work_list);
1881 spin_unlock_bh(&p->p_work_lock);
1882
1883 list_for_each_entry_safe(work, tmp, &work_list, list) {
1884 list_del_init(&work->list);
1885 /* work allocated in the bh, freed here */
1886 bnx2i_process_scsi_cmd_resp(work->session,
1887 work->bnx2i_conn,
1888 &work->cqe);
1889 atomic_dec(&work->bnx2i_conn->work_cnt);
1890 kfree(work);
1891 }
1892 spin_lock_bh(&p->p_work_lock);
1893 }
1894 set_current_state(TASK_INTERRUPTIBLE);
1895 spin_unlock_bh(&p->p_work_lock);
1896 schedule();
1897 }
1898 __set_current_state(TASK_RUNNING);
1899
1900 return 0;
1901 }
1902
1903
1904 /**
1905 * bnx2i_queue_scsi_cmd_resp - queue cmd completion to the percpu thread
1906 * @bnx2i_conn: bnx2i connection
1907 *
1908 * this function is called by generic KCQ handler to queue all pending cmd
1909 * completion CQEs
1910 *
1911 * The implementation is to queue the cmd response based on the
1912 * last recorded command for the given connection. The
1913 * cpu_id gets recorded upon task_xmit. No out-of-order completion!
1914 */
1915 static int bnx2i_queue_scsi_cmd_resp(struct iscsi_session *session,
1916 struct bnx2i_conn *bnx2i_conn,
1917 struct bnx2i_nop_in_msg *cqe)
1918 {
1919 struct bnx2i_work *bnx2i_work = NULL;
1920 struct bnx2i_percpu_s *p = NULL;
1921 struct iscsi_task *task;
1922 struct scsi_cmnd *sc;
1923 int rc = 0;
1924 int cpu;
1925
1926 spin_lock(&session->back_lock);
1927 task = iscsi_itt_to_task(bnx2i_conn->cls_conn->dd_data,
1928 cqe->itt & ISCSI_CMD_RESPONSE_INDEX);
1929 if (!task || !task->sc) {
1930 spin_unlock(&session->back_lock);
1931 return -EINVAL;
1932 }
1933 sc = task->sc;
1934
1935 if (!blk_rq_cpu_valid(sc->request))
1936 cpu = smp_processor_id();
1937 else
1938 cpu = sc->request->cpu;
1939
1940 spin_unlock(&session->back_lock);
1941
1942 p = &per_cpu(bnx2i_percpu, cpu);
1943 spin_lock(&p->p_work_lock);
1944 if (unlikely(!p->iothread)) {
1945 rc = -EINVAL;
1946 goto err;
1947 }
1948 /* Alloc and copy to the cqe */
1949 bnx2i_work = kzalloc(sizeof(struct bnx2i_work), GFP_ATOMIC);
1950 if (bnx2i_work) {
1951 INIT_LIST_HEAD(&bnx2i_work->list);
1952 bnx2i_work->session = session;
1953 bnx2i_work->bnx2i_conn = bnx2i_conn;
1954 memcpy(&bnx2i_work->cqe, cqe, sizeof(struct cqe));
1955 list_add_tail(&bnx2i_work->list, &p->work_list);
1956 atomic_inc(&bnx2i_conn->work_cnt);
1957 wake_up_process(p->iothread);
1958 spin_unlock(&p->p_work_lock);
1959 goto done;
1960 } else
1961 rc = -ENOMEM;
1962 err:
1963 spin_unlock(&p->p_work_lock);
1964 bnx2i_process_scsi_cmd_resp(session, bnx2i_conn, (struct cqe *)cqe);
1965 done:
1966 return rc;
1967 }
1968
1969
1970 /**
1971 * bnx2i_process_new_cqes - process newly DMA'ed CQE's
1972 * @bnx2i_conn: bnx2i connection
1973 *
1974 * this function is called by generic KCQ handler to process all pending CQE's
1975 */
1976 static int bnx2i_process_new_cqes(struct bnx2i_conn *bnx2i_conn)
1977 {
1978 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1979 struct iscsi_session *session = conn->session;
1980 struct bnx2i_hba *hba = bnx2i_conn->hba;
1981 struct qp_info *qp;
1982 struct bnx2i_nop_in_msg *nopin;
1983 int tgt_async_msg;
1984 int cqe_cnt = 0;
1985
1986 if (bnx2i_conn->ep == NULL)
1987 return 0;
1988
1989 qp = &bnx2i_conn->ep->qp;
1990
1991 if (!qp->cq_virt) {
1992 printk(KERN_ALERT "bnx2i (%s): cq resr freed in bh execution!",
1993 hba->netdev->name);
1994 goto out;
1995 }
1996 while (1) {
1997 nopin = (struct bnx2i_nop_in_msg *) qp->cq_cons_qe;
1998 if (nopin->cq_req_sn != qp->cqe_exp_seq_sn)
1999 break;
2000
2001 if (unlikely(test_bit(ISCSI_SUSPEND_BIT, &conn->suspend_rx))) {
2002 if (nopin->op_code == ISCSI_OP_NOOP_IN &&
2003 nopin->itt == (u16) RESERVED_ITT) {
2004 printk(KERN_ALERT "bnx2i: Unsolicited "
2005 "NOP-In detected for suspended "
2006 "connection dev=%s!\n",
2007 hba->netdev->name);
2008 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
2009 goto cqe_out;
2010 }
2011 break;
2012 }
2013 tgt_async_msg = 0;
2014
2015 switch (nopin->op_code) {
2016 case ISCSI_OP_SCSI_CMD_RSP:
2017 case ISCSI_OP_SCSI_DATA_IN:
2018 /* Run the kthread engine only for data cmds
2019 All other cmds will be completed in this bh! */
2020 bnx2i_queue_scsi_cmd_resp(session, bnx2i_conn, nopin);
2021 goto done;
2022 case ISCSI_OP_LOGIN_RSP:
2023 bnx2i_process_login_resp(session, bnx2i_conn,
2024 qp->cq_cons_qe);
2025 break;
2026 case ISCSI_OP_SCSI_TMFUNC_RSP:
2027 bnx2i_process_tmf_resp(session, bnx2i_conn,
2028 qp->cq_cons_qe);
2029 break;
2030 case ISCSI_OP_TEXT_RSP:
2031 bnx2i_process_text_resp(session, bnx2i_conn,
2032 qp->cq_cons_qe);
2033 break;
2034 case ISCSI_OP_LOGOUT_RSP:
2035 bnx2i_process_logout_resp(session, bnx2i_conn,
2036 qp->cq_cons_qe);
2037 break;
2038 case ISCSI_OP_NOOP_IN:
2039 if (bnx2i_process_nopin_mesg(session, bnx2i_conn,
2040 qp->cq_cons_qe))
2041 tgt_async_msg = 1;
2042 break;
2043 case ISCSI_OPCODE_NOPOUT_LOCAL_COMPLETION:
2044 bnx2i_process_nopin_local_cmpl(session, bnx2i_conn,
2045 qp->cq_cons_qe);
2046 break;
2047 case ISCSI_OP_ASYNC_EVENT:
2048 bnx2i_process_async_mesg(session, bnx2i_conn,
2049 qp->cq_cons_qe);
2050 tgt_async_msg = 1;
2051 break;
2052 case ISCSI_OP_REJECT:
2053 bnx2i_process_reject_mesg(session, bnx2i_conn,
2054 qp->cq_cons_qe);
2055 break;
2056 case ISCSI_OPCODE_CLEANUP_RESPONSE:
2057 bnx2i_process_cmd_cleanup_resp(session, bnx2i_conn,
2058 qp->cq_cons_qe);
2059 break;
2060 default:
2061 printk(KERN_ALERT "bnx2i: unknown opcode 0x%x\n",
2062 nopin->op_code);
2063 }
2064
2065 ADD_STATS_64(hba, rx_pdus, 1);
2066 ADD_STATS_64(hba, rx_bytes, nopin->data_length);
2067 done:
2068 if (!tgt_async_msg) {
2069 if (!atomic_read(&bnx2i_conn->ep->num_active_cmds))
2070 printk(KERN_ALERT "bnx2i (%s): no active cmd! "
2071 "op 0x%x\n",
2072 hba->netdev->name,
2073 nopin->op_code);
2074 else
2075 atomic_dec(&bnx2i_conn->ep->num_active_cmds);
2076 }
2077 cqe_out:
2078 /* clear out in production version only, till beta keep opcode
2079 * field intact, will be helpful in debugging (context dump)
2080 * nopin->op_code = 0;
2081 */
2082 cqe_cnt++;
2083 qp->cqe_exp_seq_sn++;
2084 if (qp->cqe_exp_seq_sn == (qp->cqe_size * 2 + 1))
2085 qp->cqe_exp_seq_sn = ISCSI_INITIAL_SN;
2086
2087 if (qp->cq_cons_qe == qp->cq_last_qe) {
2088 qp->cq_cons_qe = qp->cq_first_qe;
2089 qp->cq_cons_idx = 0;
2090 } else {
2091 qp->cq_cons_qe++;
2092 qp->cq_cons_idx++;
2093 }
2094 }
2095 out:
2096 return cqe_cnt;
2097 }
2098
2099 /**
2100 * bnx2i_fastpath_notification - process global event queue (KCQ)
2101 * @hba: adapter structure pointer
2102 * @new_cqe_kcqe: pointer to newly DMA'ed KCQE entry
2103 *
2104 * Fast path event notification handler, KCQ entry carries context id
2105 * of the connection that has 1 or more pending CQ entries
2106 */
2107 static void bnx2i_fastpath_notification(struct bnx2i_hba *hba,
2108 struct iscsi_kcqe *new_cqe_kcqe)
2109 {
2110 struct bnx2i_conn *bnx2i_conn;
2111 u32 iscsi_cid;
2112 int nxt_idx;
2113
2114 iscsi_cid = new_cqe_kcqe->iscsi_conn_id;
2115 bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
2116
2117 if (!bnx2i_conn) {
2118 printk(KERN_ALERT "cid #%x not valid\n", iscsi_cid);
2119 return;
2120 }
2121 if (!bnx2i_conn->ep) {
2122 printk(KERN_ALERT "cid #%x - ep not bound\n", iscsi_cid);
2123 return;
2124 }
2125
2126 bnx2i_process_new_cqes(bnx2i_conn);
2127 nxt_idx = bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep,
2128 CNIC_ARM_CQE_FP);
2129 if (nxt_idx && nxt_idx == bnx2i_process_new_cqes(bnx2i_conn))
2130 bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep, CNIC_ARM_CQE_FP);
2131 }
2132
2133
2134 /**
2135 * bnx2i_process_update_conn_cmpl - process iscsi conn update completion KCQE
2136 * @hba: adapter structure pointer
2137 * @update_kcqe: kcqe pointer
2138 *
2139 * CONN_UPDATE completion handler, this completes iSCSI connection FFP migration
2140 */
2141 static void bnx2i_process_update_conn_cmpl(struct bnx2i_hba *hba,
2142 struct iscsi_kcqe *update_kcqe)
2143 {
2144 struct bnx2i_conn *conn;
2145 u32 iscsi_cid;
2146
2147 iscsi_cid = update_kcqe->iscsi_conn_id;
2148 conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
2149
2150 if (!conn) {
2151 printk(KERN_ALERT "conn_update: cid %x not valid\n", iscsi_cid);
2152 return;
2153 }
2154 if (!conn->ep) {
2155 printk(KERN_ALERT "cid %x does not have ep bound\n", iscsi_cid);
2156 return;
2157 }
2158
2159 if (update_kcqe->completion_status) {
2160 printk(KERN_ALERT "request failed cid %x\n", iscsi_cid);
2161 conn->ep->state = EP_STATE_ULP_UPDATE_FAILED;
2162 } else
2163 conn->ep->state = EP_STATE_ULP_UPDATE_COMPL;
2164
2165 wake_up_interruptible(&conn->ep->ofld_wait);
2166 }
2167
2168
2169 /**
2170 * bnx2i_recovery_que_add_conn - add connection to recovery queue
2171 * @hba: adapter structure pointer
2172 * @bnx2i_conn: iscsi connection
2173 *
2174 * Add connection to recovery queue and schedule adapter eh worker
2175 */
2176 static void bnx2i_recovery_que_add_conn(struct bnx2i_hba *hba,
2177 struct bnx2i_conn *bnx2i_conn)
2178 {
2179 iscsi_conn_failure(bnx2i_conn->cls_conn->dd_data,
2180 ISCSI_ERR_CONN_FAILED);
2181 }
2182
2183
2184 /**
2185 * bnx2i_process_tcp_error - process error notification on a given connection
2186 *
2187 * @hba: adapter structure pointer
2188 * @tcp_err: tcp error kcqe pointer
2189 *
2190 * handles tcp level error notifications from FW.
2191 */
2192 static void bnx2i_process_tcp_error(struct bnx2i_hba *hba,
2193 struct iscsi_kcqe *tcp_err)
2194 {
2195 struct bnx2i_conn *bnx2i_conn;
2196 u32 iscsi_cid;
2197
2198 iscsi_cid = tcp_err->iscsi_conn_id;
2199 bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
2200
2201 if (!bnx2i_conn) {
2202 printk(KERN_ALERT "bnx2i - cid 0x%x not valid\n", iscsi_cid);
2203 return;
2204 }
2205
2206 printk(KERN_ALERT "bnx2i - cid 0x%x had TCP errors, error code 0x%x\n",
2207 iscsi_cid, tcp_err->completion_status);
2208 bnx2i_recovery_que_add_conn(bnx2i_conn->hba, bnx2i_conn);
2209 }
2210
2211
2212 /**
2213 * bnx2i_process_iscsi_error - process error notification on a given connection
2214 * @hba: adapter structure pointer
2215 * @iscsi_err: iscsi error kcqe pointer
2216 *
2217 * handles iscsi error notifications from the FW. Firmware based in initial
2218 * handshake classifies iscsi protocol / TCP rfc violation into either
2219 * warning or error indications. If indication is of "Error" type, driver
2220 * will initiate session recovery for that connection/session. For
2221 * "Warning" type indication, driver will put out a system log message
2222 * (there will be only one message for each type for the life of the
2223 * session, this is to avoid un-necessarily overloading the system)
2224 */
2225 static void bnx2i_process_iscsi_error(struct bnx2i_hba *hba,
2226 struct iscsi_kcqe *iscsi_err)
2227 {
2228 struct bnx2i_conn *bnx2i_conn;
2229 u32 iscsi_cid;
2230 char warn_notice[] = "iscsi_warning";
2231 char error_notice[] = "iscsi_error";
2232 char additional_notice[64];
2233 char *message;
2234 int need_recovery;
2235 u64 err_mask64;
2236
2237 iscsi_cid = iscsi_err->iscsi_conn_id;
2238 bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
2239 if (!bnx2i_conn) {
2240 printk(KERN_ALERT "bnx2i - cid 0x%x not valid\n", iscsi_cid);
2241 return;
2242 }
2243
2244 err_mask64 = (0x1ULL << iscsi_err->completion_status);
2245
2246 if (err_mask64 & iscsi_error_mask) {
2247 need_recovery = 0;
2248 message = warn_notice;
2249 } else {
2250 need_recovery = 1;
2251 message = error_notice;
2252 }
2253
2254 switch (iscsi_err->completion_status) {
2255 case ISCSI_KCQE_COMPLETION_STATUS_HDR_DIG_ERR:
2256 strcpy(additional_notice, "hdr digest err");
2257 break;
2258 case ISCSI_KCQE_COMPLETION_STATUS_DATA_DIG_ERR:
2259 strcpy(additional_notice, "data digest err");
2260 break;
2261 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_OPCODE:
2262 strcpy(additional_notice, "wrong opcode rcvd");
2263 break;
2264 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_AHS_LEN:
2265 strcpy(additional_notice, "AHS len > 0 rcvd");
2266 break;
2267 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_ITT:
2268 strcpy(additional_notice, "invalid ITT rcvd");
2269 break;
2270 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_STATSN:
2271 strcpy(additional_notice, "wrong StatSN rcvd");
2272 break;
2273 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_EXP_DATASN:
2274 strcpy(additional_notice, "wrong DataSN rcvd");
2275 break;
2276 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T:
2277 strcpy(additional_notice, "pend R2T violation");
2278 break;
2279 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_0:
2280 strcpy(additional_notice, "ERL0, UO");
2281 break;
2282 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_1:
2283 strcpy(additional_notice, "ERL0, U1");
2284 break;
2285 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_2:
2286 strcpy(additional_notice, "ERL0, U2");
2287 break;
2288 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_3:
2289 strcpy(additional_notice, "ERL0, U3");
2290 break;
2291 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_4:
2292 strcpy(additional_notice, "ERL0, U4");
2293 break;
2294 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_5:
2295 strcpy(additional_notice, "ERL0, U5");
2296 break;
2297 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_6:
2298 strcpy(additional_notice, "ERL0, U6");
2299 break;
2300 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REMAIN_RCV_LEN:
2301 strcpy(additional_notice, "invalid resi len");
2302 break;
2303 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_MAX_RCV_PDU_LEN:
2304 strcpy(additional_notice, "MRDSL violation");
2305 break;
2306 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_F_BIT_ZERO:
2307 strcpy(additional_notice, "F-bit not set");
2308 break;
2309 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_NOT_RSRV:
2310 strcpy(additional_notice, "invalid TTT");
2311 break;
2312 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DATASN:
2313 strcpy(additional_notice, "invalid DataSN");
2314 break;
2315 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REMAIN_BURST_LEN:
2316 strcpy(additional_notice, "burst len violation");
2317 break;
2318 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_BUFFER_OFF:
2319 strcpy(additional_notice, "buf offset violation");
2320 break;
2321 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_LUN:
2322 strcpy(additional_notice, "invalid LUN field");
2323 break;
2324 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_R2TSN:
2325 strcpy(additional_notice, "invalid R2TSN field");
2326 break;
2327 #define BNX2I_ERR_DESIRED_DATA_TRNS_LEN_0 \
2328 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_0
2329 case BNX2I_ERR_DESIRED_DATA_TRNS_LEN_0:
2330 strcpy(additional_notice, "invalid cmd len1");
2331 break;
2332 #define BNX2I_ERR_DESIRED_DATA_TRNS_LEN_1 \
2333 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_1
2334 case BNX2I_ERR_DESIRED_DATA_TRNS_LEN_1:
2335 strcpy(additional_notice, "invalid cmd len2");
2336 break;
2337 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T_EXCEED:
2338 strcpy(additional_notice,
2339 "pend r2t exceeds MaxOutstandingR2T value");
2340 break;
2341 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_IS_RSRV:
2342 strcpy(additional_notice, "TTT is rsvd");
2343 break;
2344 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_MAX_BURST_LEN:
2345 strcpy(additional_notice, "MBL violation");
2346 break;
2347 #define BNX2I_ERR_DATA_SEG_LEN_NOT_ZERO \
2348 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DATA_SEG_LEN_NOT_ZERO
2349 case BNX2I_ERR_DATA_SEG_LEN_NOT_ZERO:
2350 strcpy(additional_notice, "data seg len != 0");
2351 break;
2352 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REJECT_PDU_LEN:
2353 strcpy(additional_notice, "reject pdu len error");
2354 break;
2355 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_ASYNC_PDU_LEN:
2356 strcpy(additional_notice, "async pdu len error");
2357 break;
2358 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_NOPIN_PDU_LEN:
2359 strcpy(additional_notice, "nopin pdu len error");
2360 break;
2361 #define BNX2_ERR_PEND_R2T_IN_CLEANUP \
2362 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T_IN_CLEANUP
2363 case BNX2_ERR_PEND_R2T_IN_CLEANUP:
2364 strcpy(additional_notice, "pend r2t in cleanup");
2365 break;
2366
2367 case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_IP_FRAGMENT:
2368 strcpy(additional_notice, "IP fragments rcvd");
2369 break;
2370 case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_IP_OPTIONS:
2371 strcpy(additional_notice, "IP options error");
2372 break;
2373 case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_URGENT_FLAG:
2374 strcpy(additional_notice, "urgent flag error");
2375 break;
2376 default:
2377 printk(KERN_ALERT "iscsi_err - unknown err %x\n",
2378 iscsi_err->completion_status);
2379 }
2380
2381 if (need_recovery) {
2382 iscsi_conn_printk(KERN_ALERT,
2383 bnx2i_conn->cls_conn->dd_data,
2384 "bnx2i: %s - %s\n",
2385 message, additional_notice);
2386
2387 iscsi_conn_printk(KERN_ALERT,
2388 bnx2i_conn->cls_conn->dd_data,
2389 "conn_err - hostno %d conn %p, "
2390 "iscsi_cid %x cid %x\n",
2391 bnx2i_conn->hba->shost->host_no,
2392 bnx2i_conn, bnx2i_conn->ep->ep_iscsi_cid,
2393 bnx2i_conn->ep->ep_cid);
2394 bnx2i_recovery_que_add_conn(bnx2i_conn->hba, bnx2i_conn);
2395 } else
2396 if (!test_and_set_bit(iscsi_err->completion_status,
2397 (void *) &bnx2i_conn->violation_notified))
2398 iscsi_conn_printk(KERN_ALERT,
2399 bnx2i_conn->cls_conn->dd_data,
2400 "bnx2i: %s - %s\n",
2401 message, additional_notice);
2402 }
2403
2404
2405 /**
2406 * bnx2i_process_conn_destroy_cmpl - process iscsi conn destroy completion
2407 * @hba: adapter structure pointer
2408 * @conn_destroy: conn destroy kcqe pointer
2409 *
2410 * handles connection destroy completion request.
2411 */
2412 static void bnx2i_process_conn_destroy_cmpl(struct bnx2i_hba *hba,
2413 struct iscsi_kcqe *conn_destroy)
2414 {
2415 struct bnx2i_endpoint *ep;
2416
2417 ep = bnx2i_find_ep_in_destroy_list(hba, conn_destroy->iscsi_conn_id);
2418 if (!ep) {
2419 printk(KERN_ALERT "bnx2i_conn_destroy_cmpl: no pending "
2420 "offload request, unexpected completion\n");
2421 return;
2422 }
2423
2424 if (hba != ep->hba) {
2425 printk(KERN_ALERT "conn destroy- error hba mis-match\n");
2426 return;
2427 }
2428
2429 if (conn_destroy->completion_status) {
2430 printk(KERN_ALERT "conn_destroy_cmpl: op failed\n");
2431 ep->state = EP_STATE_CLEANUP_FAILED;
2432 } else
2433 ep->state = EP_STATE_CLEANUP_CMPL;
2434 wake_up_interruptible(&ep->ofld_wait);
2435 }
2436
2437
2438 /**
2439 * bnx2i_process_ofld_cmpl - process initial iscsi conn offload completion
2440 * @hba: adapter structure pointer
2441 * @ofld_kcqe: conn offload kcqe pointer
2442 *
2443 * handles initial connection offload completion, ep_connect() thread is
2444 * woken-up to continue with LLP connect process
2445 */
2446 static void bnx2i_process_ofld_cmpl(struct bnx2i_hba *hba,
2447 struct iscsi_kcqe *ofld_kcqe)
2448 {
2449 u32 cid_addr;
2450 struct bnx2i_endpoint *ep;
2451 u32 cid_num;
2452
2453 ep = bnx2i_find_ep_in_ofld_list(hba, ofld_kcqe->iscsi_conn_id);
2454 if (!ep) {
2455 printk(KERN_ALERT "ofld_cmpl: no pend offload request\n");
2456 return;
2457 }
2458
2459 if (hba != ep->hba) {
2460 printk(KERN_ALERT "ofld_cmpl: error hba mis-match\n");
2461 return;
2462 }
2463
2464 if (ofld_kcqe->completion_status) {
2465 ep->state = EP_STATE_OFLD_FAILED;
2466 if (ofld_kcqe->completion_status ==
2467 ISCSI_KCQE_COMPLETION_STATUS_CTX_ALLOC_FAILURE)
2468 printk(KERN_ALERT "bnx2i (%s): ofld1 cmpl - unable "
2469 "to allocate iSCSI context resources\n",
2470 hba->netdev->name);
2471 else if (ofld_kcqe->completion_status ==
2472 ISCSI_KCQE_COMPLETION_STATUS_INVALID_OPCODE)
2473 printk(KERN_ALERT "bnx2i (%s): ofld1 cmpl - invalid "
2474 "opcode\n", hba->netdev->name);
2475 else if (ofld_kcqe->completion_status ==
2476 ISCSI_KCQE_COMPLETION_STATUS_CID_BUSY)
2477 /* error status code valid only for 5771x chipset */
2478 ep->state = EP_STATE_OFLD_FAILED_CID_BUSY;
2479 else
2480 printk(KERN_ALERT "bnx2i (%s): ofld1 cmpl - invalid "
2481 "error code %d\n", hba->netdev->name,
2482 ofld_kcqe->completion_status);
2483 } else {
2484 ep->state = EP_STATE_OFLD_COMPL;
2485 cid_addr = ofld_kcqe->iscsi_conn_context_id;
2486 cid_num = bnx2i_get_cid_num(ep);
2487 ep->ep_cid = cid_addr;
2488 ep->qp.ctx_base = NULL;
2489 }
2490 wake_up_interruptible(&ep->ofld_wait);
2491 }
2492
2493 /**
2494 * bnx2i_indicate_kcqe - process iscsi conn update completion KCQE
2495 * @hba: adapter structure pointer
2496 * @update_kcqe: kcqe pointer
2497 *
2498 * Generic KCQ event handler/dispatcher
2499 */
2500 static void bnx2i_indicate_kcqe(void *context, struct kcqe *kcqe[],
2501 u32 num_cqe)
2502 {
2503 struct bnx2i_hba *hba = context;
2504 int i = 0;
2505 struct iscsi_kcqe *ikcqe = NULL;
2506
2507 while (i < num_cqe) {
2508 ikcqe = (struct iscsi_kcqe *) kcqe[i++];
2509
2510 if (ikcqe->op_code ==
2511 ISCSI_KCQE_OPCODE_CQ_EVENT_NOTIFICATION)
2512 bnx2i_fastpath_notification(hba, ikcqe);
2513 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_OFFLOAD_CONN)
2514 bnx2i_process_ofld_cmpl(hba, ikcqe);
2515 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_UPDATE_CONN)
2516 bnx2i_process_update_conn_cmpl(hba, ikcqe);
2517 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_INIT) {
2518 if (ikcqe->completion_status !=
2519 ISCSI_KCQE_COMPLETION_STATUS_SUCCESS)
2520 bnx2i_iscsi_license_error(hba, ikcqe->\
2521 completion_status);
2522 else {
2523 set_bit(ADAPTER_STATE_UP, &hba->adapter_state);
2524 bnx2i_get_link_state(hba);
2525 printk(KERN_INFO "bnx2i [%.2x:%.2x.%.2x]: "
2526 "ISCSI_INIT passed\n",
2527 (u8)hba->pcidev->bus->number,
2528 hba->pci_devno,
2529 (u8)hba->pci_func);
2530
2531
2532 }
2533 } else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_DESTROY_CONN)
2534 bnx2i_process_conn_destroy_cmpl(hba, ikcqe);
2535 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_ISCSI_ERROR)
2536 bnx2i_process_iscsi_error(hba, ikcqe);
2537 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_TCP_ERROR)
2538 bnx2i_process_tcp_error(hba, ikcqe);
2539 else
2540 printk(KERN_ALERT "bnx2i: unknown opcode 0x%x\n",
2541 ikcqe->op_code);
2542 }
2543 }
2544
2545
2546 /**
2547 * bnx2i_indicate_netevent - Generic netdev event handler
2548 * @context: adapter structure pointer
2549 * @event: event type
2550 * @vlan_id: vlans id - associated vlan id with this event
2551 *
2552 * Handles four netdev events, NETDEV_UP, NETDEV_DOWN,
2553 * NETDEV_GOING_DOWN and NETDEV_CHANGE
2554 */
2555 static void bnx2i_indicate_netevent(void *context, unsigned long event,
2556 u16 vlan_id)
2557 {
2558 struct bnx2i_hba *hba = context;
2559
2560 /* Ignore all netevent coming from vlans */
2561 if (vlan_id != 0)
2562 return;
2563
2564 switch (event) {
2565 case NETDEV_UP:
2566 if (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state))
2567 bnx2i_send_fw_iscsi_init_msg(hba);
2568 break;
2569 case NETDEV_DOWN:
2570 clear_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state);
2571 clear_bit(ADAPTER_STATE_UP, &hba->adapter_state);
2572 break;
2573 case NETDEV_GOING_DOWN:
2574 set_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state);
2575 iscsi_host_for_each_session(hba->shost,
2576 bnx2i_drop_session);
2577 break;
2578 case NETDEV_CHANGE:
2579 bnx2i_get_link_state(hba);
2580 break;
2581 default:
2582 ;
2583 }
2584 }
2585
2586
2587 /**
2588 * bnx2i_cm_connect_cmpl - process iscsi conn establishment completion
2589 * @cm_sk: cnic sock structure pointer
2590 *
2591 * function callback exported via bnx2i - cnic driver interface to
2592 * indicate completion of option-2 TCP connect request.
2593 */
2594 static void bnx2i_cm_connect_cmpl(struct cnic_sock *cm_sk)
2595 {
2596 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2597
2598 if (test_bit(ADAPTER_STATE_GOING_DOWN, &ep->hba->adapter_state))
2599 ep->state = EP_STATE_CONNECT_FAILED;
2600 else if (test_bit(SK_F_OFFLD_COMPLETE, &cm_sk->flags))
2601 ep->state = EP_STATE_CONNECT_COMPL;
2602 else
2603 ep->state = EP_STATE_CONNECT_FAILED;
2604
2605 wake_up_interruptible(&ep->ofld_wait);
2606 }
2607
2608
2609 /**
2610 * bnx2i_cm_close_cmpl - process tcp conn close completion
2611 * @cm_sk: cnic sock structure pointer
2612 *
2613 * function callback exported via bnx2i - cnic driver interface to
2614 * indicate completion of option-2 graceful TCP connect shutdown
2615 */
2616 static void bnx2i_cm_close_cmpl(struct cnic_sock *cm_sk)
2617 {
2618 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2619
2620 ep->state = EP_STATE_DISCONN_COMPL;
2621 wake_up_interruptible(&ep->ofld_wait);
2622 }
2623
2624
2625 /**
2626 * bnx2i_cm_abort_cmpl - process abortive tcp conn teardown completion
2627 * @cm_sk: cnic sock structure pointer
2628 *
2629 * function callback exported via bnx2i - cnic driver interface to
2630 * indicate completion of option-2 abortive TCP connect termination
2631 */
2632 static void bnx2i_cm_abort_cmpl(struct cnic_sock *cm_sk)
2633 {
2634 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2635
2636 ep->state = EP_STATE_DISCONN_COMPL;
2637 wake_up_interruptible(&ep->ofld_wait);
2638 }
2639
2640
2641 /**
2642 * bnx2i_cm_remote_close - process received TCP FIN
2643 * @hba: adapter structure pointer
2644 * @update_kcqe: kcqe pointer
2645 *
2646 * function callback exported via bnx2i - cnic driver interface to indicate
2647 * async TCP events such as FIN
2648 */
2649 static void bnx2i_cm_remote_close(struct cnic_sock *cm_sk)
2650 {
2651 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2652
2653 ep->state = EP_STATE_TCP_FIN_RCVD;
2654 if (ep->conn)
2655 bnx2i_recovery_que_add_conn(ep->hba, ep->conn);
2656 }
2657
2658 /**
2659 * bnx2i_cm_remote_abort - process TCP RST and start conn cleanup
2660 * @hba: adapter structure pointer
2661 * @update_kcqe: kcqe pointer
2662 *
2663 * function callback exported via bnx2i - cnic driver interface to
2664 * indicate async TCP events (RST) sent by the peer.
2665 */
2666 static void bnx2i_cm_remote_abort(struct cnic_sock *cm_sk)
2667 {
2668 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2669 u32 old_state = ep->state;
2670
2671 ep->state = EP_STATE_TCP_RST_RCVD;
2672 if (old_state == EP_STATE_DISCONN_START)
2673 wake_up_interruptible(&ep->ofld_wait);
2674 else
2675 if (ep->conn)
2676 bnx2i_recovery_que_add_conn(ep->hba, ep->conn);
2677 }
2678
2679
2680 static int bnx2i_send_nl_mesg(void *context, u32 msg_type,
2681 char *buf, u16 buflen)
2682 {
2683 struct bnx2i_hba *hba = context;
2684 int rc;
2685
2686 if (!hba)
2687 return -ENODEV;
2688
2689 rc = iscsi_offload_mesg(hba->shost, &bnx2i_iscsi_transport,
2690 msg_type, buf, buflen);
2691 if (rc)
2692 printk(KERN_ALERT "bnx2i: private nl message send error\n");
2693
2694 return rc;
2695 }
2696
2697
2698 /**
2699 * bnx2i_cnic_cb - global template of bnx2i - cnic driver interface structure
2700 * carrying callback function pointers
2701 *
2702 */
2703 struct cnic_ulp_ops bnx2i_cnic_cb = {
2704 .cnic_init = bnx2i_ulp_init,
2705 .cnic_exit = bnx2i_ulp_exit,
2706 .cnic_start = bnx2i_start,
2707 .cnic_stop = bnx2i_stop,
2708 .indicate_kcqes = bnx2i_indicate_kcqe,
2709 .indicate_netevent = bnx2i_indicate_netevent,
2710 .cm_connect_complete = bnx2i_cm_connect_cmpl,
2711 .cm_close_complete = bnx2i_cm_close_cmpl,
2712 .cm_abort_complete = bnx2i_cm_abort_cmpl,
2713 .cm_remote_close = bnx2i_cm_remote_close,
2714 .cm_remote_abort = bnx2i_cm_remote_abort,
2715 .iscsi_nl_send_msg = bnx2i_send_nl_mesg,
2716 .cnic_get_stats = bnx2i_get_stats,
2717 .owner = THIS_MODULE
2718 };
2719
2720
2721 /**
2722 * bnx2i_map_ep_dbell_regs - map connection doorbell registers
2723 * @ep: bnx2i endpoint
2724 *
2725 * maps connection's SQ and RQ doorbell registers, 5706/5708/5709 hosts these
2726 * register in BAR #0. Whereas in 57710 these register are accessed by
2727 * mapping BAR #1
2728 */
2729 int bnx2i_map_ep_dbell_regs(struct bnx2i_endpoint *ep)
2730 {
2731 u32 cid_num;
2732 u32 reg_off;
2733 u32 first_l4l5;
2734 u32 ctx_sz;
2735 u32 config2;
2736 resource_size_t reg_base;
2737
2738 cid_num = bnx2i_get_cid_num(ep);
2739
2740 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
2741 reg_base = pci_resource_start(ep->hba->pcidev,
2742 BNX2X_DOORBELL_PCI_BAR);
2743 reg_off = (1 << BNX2X_DB_SHIFT) * (cid_num & 0x1FFFF);
2744 ep->qp.ctx_base = ioremap_nocache(reg_base + reg_off, 4);
2745 if (!ep->qp.ctx_base)
2746 return -ENOMEM;
2747 goto arm_cq;
2748 }
2749
2750 if ((test_bit(BNX2I_NX2_DEV_5709, &ep->hba->cnic_dev_type)) &&
2751 (ep->hba->mail_queue_access == BNX2I_MQ_BIN_MODE)) {
2752 config2 = REG_RD(ep->hba, BNX2_MQ_CONFIG2);
2753 first_l4l5 = config2 & BNX2_MQ_CONFIG2_FIRST_L4L5;
2754 ctx_sz = (config2 & BNX2_MQ_CONFIG2_CONT_SZ) >> 3;
2755 if (ctx_sz)
2756 reg_off = CTX_OFFSET + MAX_CID_CNT * MB_KERNEL_CTX_SIZE
2757 + BNX2I_570X_PAGE_SIZE_DEFAULT *
2758 (((cid_num - first_l4l5) / ctx_sz) + 256);
2759 else
2760 reg_off = CTX_OFFSET + (MB_KERNEL_CTX_SIZE * cid_num);
2761 } else
2762 /* 5709 device in normal node and 5706/5708 devices */
2763 reg_off = CTX_OFFSET + (MB_KERNEL_CTX_SIZE * cid_num);
2764
2765 ep->qp.ctx_base = ioremap_nocache(ep->hba->reg_base + reg_off,
2766 MB_KERNEL_CTX_SIZE);
2767 if (!ep->qp.ctx_base)
2768 return -ENOMEM;
2769
2770 arm_cq:
2771 bnx2i_arm_cq_event_coalescing(ep, CNIC_ARM_CQE);
2772 return 0;
2773 }
Linux with added FPC-III support