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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / scsi / bnx2i / bnx2i_hwi.c
blobe53ebc5eff85e3f7d211862cdecbd7ed3f5820ed
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 }
257
258
259 /**
260 * bnx2i_ring_sq_dbell - Ring SQ doorbell to wake-up the processing engine
261 * @conn: iscsi connection to which new SQ entries belong
262 * @count: number of SQ WQEs to post
263 *
264 * SQ DB is updated in host memory and TX Doorbell is rung for 57710 family
265 * of devices. For 5706/5708/5709 new SQ WQE count is written into the
266 * doorbell register
267 */
268 static void bnx2i_ring_sq_dbell(struct bnx2i_conn *bnx2i_conn, int count)
269 {
270 struct bnx2i_5771x_sq_rq_db *sq_db;
271 struct bnx2i_endpoint *ep = bnx2i_conn->ep;
272
273 atomic_inc(&ep->num_active_cmds);
274 wmb(); /* flush SQ WQE memory before the doorbell is rung */
275 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
276 sq_db = (struct bnx2i_5771x_sq_rq_db *) ep->qp.sq_pgtbl_virt;
277 sq_db->prod_idx = ep->qp.sq_prod_idx;
278 bnx2i_ring_577xx_doorbell(bnx2i_conn);
279 } else
280 writew(count, ep->qp.ctx_base + CNIC_SEND_DOORBELL);
281 }
282
283
284 /**
285 * bnx2i_ring_dbell_update_sq_params - update SQ driver parameters
286 * @conn: iscsi connection to which new SQ entries belong
287 * @count: number of SQ WQEs to post
288 *
289 * this routine will update SQ driver parameters and ring the doorbell
290 */
291 static void bnx2i_ring_dbell_update_sq_params(struct bnx2i_conn *bnx2i_conn,
292 int count)
293 {
294 int tmp_cnt;
295
296 if (count == 1) {
297 if (bnx2i_conn->ep->qp.sq_prod_qe ==
298 bnx2i_conn->ep->qp.sq_last_qe)
299 bnx2i_conn->ep->qp.sq_prod_qe =
300 bnx2i_conn->ep->qp.sq_first_qe;
301 else
302 bnx2i_conn->ep->qp.sq_prod_qe++;
303 } else {
304 if ((bnx2i_conn->ep->qp.sq_prod_qe + count) <=
305 bnx2i_conn->ep->qp.sq_last_qe)
306 bnx2i_conn->ep->qp.sq_prod_qe += count;
307 else {
308 tmp_cnt = bnx2i_conn->ep->qp.sq_last_qe -
309 bnx2i_conn->ep->qp.sq_prod_qe;
310 bnx2i_conn->ep->qp.sq_prod_qe =
311 &bnx2i_conn->ep->qp.sq_first_qe[count -
312 (tmp_cnt + 1)];
313 }
314 }
315 bnx2i_conn->ep->qp.sq_prod_idx += count;
316 /* Ring the doorbell */
317 bnx2i_ring_sq_dbell(bnx2i_conn, bnx2i_conn->ep->qp.sq_prod_idx);
318 }
319
320
321 /**
322 * bnx2i_send_iscsi_login - post iSCSI login request MP WQE to hardware
323 * @conn: iscsi connection
324 * @cmd: driver command structure which is requesting
325 * a WQE to sent to chip for further processing
326 *
327 * prepare and post an iSCSI Login request WQE to CNIC firmware
328 */
329 int bnx2i_send_iscsi_login(struct bnx2i_conn *bnx2i_conn,
330 struct iscsi_task *task)
331 {
332 struct bnx2i_login_request *login_wqe;
333 struct iscsi_login_req *login_hdr;
334 u32 dword;
335
336 login_hdr = (struct iscsi_login_req *)task->hdr;
337 login_wqe = (struct bnx2i_login_request *)
338 bnx2i_conn->ep->qp.sq_prod_qe;
339
340 login_wqe->op_code = login_hdr->opcode;
341 login_wqe->op_attr = login_hdr->flags;
342 login_wqe->version_max = login_hdr->max_version;
343 login_wqe->version_min = login_hdr->min_version;
344 login_wqe->data_length = ntoh24(login_hdr->dlength);
345 login_wqe->isid_lo = *((u32 *) login_hdr->isid);
346 login_wqe->isid_hi = *((u16 *) login_hdr->isid + 2);
347 login_wqe->tsih = login_hdr->tsih;
348 login_wqe->itt = task->itt |
349 (ISCSI_TASK_TYPE_MPATH << ISCSI_LOGIN_REQUEST_TYPE_SHIFT);
350 login_wqe->cid = login_hdr->cid;
351
352 login_wqe->cmd_sn = be32_to_cpu(login_hdr->cmdsn);
353 login_wqe->exp_stat_sn = be32_to_cpu(login_hdr->exp_statsn);
354 login_wqe->flags = ISCSI_LOGIN_REQUEST_UPDATE_EXP_STAT_SN;
355
356 login_wqe->resp_bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_bd_dma;
357 login_wqe->resp_bd_list_addr_hi =
358 (u32) ((u64) bnx2i_conn->gen_pdu.resp_bd_dma >> 32);
359
360 dword = ((1 << ISCSI_LOGIN_REQUEST_NUM_RESP_BDS_SHIFT) |
361 (bnx2i_conn->gen_pdu.resp_buf_size <<
362 ISCSI_LOGIN_REQUEST_RESP_BUFFER_LENGTH_SHIFT));
363 login_wqe->resp_buffer = dword;
364 login_wqe->bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.req_bd_dma;
365 login_wqe->bd_list_addr_hi =
366 (u32) ((u64) bnx2i_conn->gen_pdu.req_bd_dma >> 32);
367 login_wqe->num_bds = 1;
368 login_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
369
370 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
371 return 0;
372 }
373
374 /**
375 * bnx2i_send_iscsi_tmf - post iSCSI task management request MP WQE to hardware
376 * @conn: iscsi connection
377 * @mtask: driver command structure which is requesting
378 * a WQE to sent to chip for further processing
379 *
380 * prepare and post an iSCSI Login request WQE to CNIC firmware
381 */
382 int bnx2i_send_iscsi_tmf(struct bnx2i_conn *bnx2i_conn,
383 struct iscsi_task *mtask)
384 {
385 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
386 struct iscsi_tm *tmfabort_hdr;
387 struct scsi_cmnd *ref_sc;
388 struct iscsi_task *ctask;
389 struct bnx2i_tmf_request *tmfabort_wqe;
390 u32 dword;
391 u32 scsi_lun[2];
392
393 tmfabort_hdr = (struct iscsi_tm *)mtask->hdr;
394 tmfabort_wqe = (struct bnx2i_tmf_request *)
395 bnx2i_conn->ep->qp.sq_prod_qe;
396
397 tmfabort_wqe->op_code = tmfabort_hdr->opcode;
398 tmfabort_wqe->op_attr = tmfabort_hdr->flags;
399
400 tmfabort_wqe->itt = (mtask->itt | (ISCSI_TASK_TYPE_MPATH << 14));
401 tmfabort_wqe->reserved2 = 0;
402 tmfabort_wqe->cmd_sn = be32_to_cpu(tmfabort_hdr->cmdsn);
403
404 switch (tmfabort_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) {
405 case ISCSI_TM_FUNC_ABORT_TASK:
406 case ISCSI_TM_FUNC_TASK_REASSIGN:
407 ctask = iscsi_itt_to_task(conn, tmfabort_hdr->rtt);
408 if (!ctask || !ctask->sc)
409 /*
410 * the iscsi layer must have completed the cmd while
411 * was starting up.
412 *
413 * Note: In the case of a SCSI cmd timeout, the task's
414 * sc is still active; hence ctask->sc != 0
415 * In this case, the task must be aborted
416 */
417 return 0;
418
419 ref_sc = ctask->sc;
420 if (ref_sc->sc_data_direction == DMA_TO_DEVICE)
421 dword = (ISCSI_TASK_TYPE_WRITE <<
422 ISCSI_CMD_REQUEST_TYPE_SHIFT);
423 else
424 dword = (ISCSI_TASK_TYPE_READ <<
425 ISCSI_CMD_REQUEST_TYPE_SHIFT);
426 tmfabort_wqe->ref_itt = (dword |
427 (tmfabort_hdr->rtt & ISCSI_ITT_MASK));
428 break;
429 default:
430 tmfabort_wqe->ref_itt = RESERVED_ITT;
431 }
432 memcpy(scsi_lun, &tmfabort_hdr->lun, sizeof(struct scsi_lun));
433 tmfabort_wqe->lun[0] = be32_to_cpu(scsi_lun[0]);
434 tmfabort_wqe->lun[1] = be32_to_cpu(scsi_lun[1]);
435
436 tmfabort_wqe->ref_cmd_sn = be32_to_cpu(tmfabort_hdr->refcmdsn);
437
438 tmfabort_wqe->bd_list_addr_lo = (u32) bnx2i_conn->hba->mp_bd_dma;
439 tmfabort_wqe->bd_list_addr_hi = (u32)
440 ((u64) bnx2i_conn->hba->mp_bd_dma >> 32);
441 tmfabort_wqe->num_bds = 1;
442 tmfabort_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
443
444 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
445 return 0;
446 }
447
448 /**
449 * bnx2i_send_iscsi_text - post iSCSI text WQE to hardware
450 * @conn: iscsi connection
451 * @mtask: driver command structure which is requesting
452 * a WQE to sent to chip for further processing
453 *
454 * prepare and post an iSCSI Text request WQE to CNIC firmware
455 */
456 int bnx2i_send_iscsi_text(struct bnx2i_conn *bnx2i_conn,
457 struct iscsi_task *mtask)
458 {
459 struct bnx2i_text_request *text_wqe;
460 struct iscsi_text *text_hdr;
461 u32 dword;
462
463 text_hdr = (struct iscsi_text *)mtask->hdr;
464 text_wqe = (struct bnx2i_text_request *) bnx2i_conn->ep->qp.sq_prod_qe;
465
466 memset(text_wqe, 0, sizeof(struct bnx2i_text_request));
467
468 text_wqe->op_code = text_hdr->opcode;
469 text_wqe->op_attr = text_hdr->flags;
470 text_wqe->data_length = ntoh24(text_hdr->dlength);
471 text_wqe->itt = mtask->itt |
472 (ISCSI_TASK_TYPE_MPATH << ISCSI_TEXT_REQUEST_TYPE_SHIFT);
473 text_wqe->ttt = be32_to_cpu(text_hdr->ttt);
474
475 text_wqe->cmd_sn = be32_to_cpu(text_hdr->cmdsn);
476
477 text_wqe->resp_bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_bd_dma;
478 text_wqe->resp_bd_list_addr_hi =
479 (u32) ((u64) bnx2i_conn->gen_pdu.resp_bd_dma >> 32);
480
481 dword = ((1 << ISCSI_TEXT_REQUEST_NUM_RESP_BDS_SHIFT) |
482 (bnx2i_conn->gen_pdu.resp_buf_size <<
483 ISCSI_TEXT_REQUEST_RESP_BUFFER_LENGTH_SHIFT));
484 text_wqe->resp_buffer = dword;
485 text_wqe->bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.req_bd_dma;
486 text_wqe->bd_list_addr_hi =
487 (u32) ((u64) bnx2i_conn->gen_pdu.req_bd_dma >> 32);
488 text_wqe->num_bds = 1;
489 text_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
490
491 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
492 return 0;
493 }
494
495
496 /**
497 * bnx2i_send_iscsi_scsicmd - post iSCSI scsicmd request WQE to hardware
498 * @conn: iscsi connection
499 * @cmd: driver command structure which is requesting
500 * a WQE to sent to chip for further processing
501 *
502 * prepare and post an iSCSI SCSI-CMD request WQE to CNIC firmware
503 */
504 int bnx2i_send_iscsi_scsicmd(struct bnx2i_conn *bnx2i_conn,
505 struct bnx2i_cmd *cmd)
506 {
507 struct bnx2i_cmd_request *scsi_cmd_wqe;
508
509 scsi_cmd_wqe = (struct bnx2i_cmd_request *)
510 bnx2i_conn->ep->qp.sq_prod_qe;
511 memcpy(scsi_cmd_wqe, &cmd->req, sizeof(struct bnx2i_cmd_request));
512 scsi_cmd_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
513
514 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
515 return 0;
516 }
517
518 /**
519 * bnx2i_send_iscsi_nopout - post iSCSI NOPOUT request WQE to hardware
520 * @conn: iscsi connection
521 * @cmd: driver command structure which is requesting
522 * a WQE to sent to chip for further processing
523 * @datap: payload buffer pointer
524 * @data_len: payload data length
525 * @unsol: indicated whether nopout pdu is unsolicited pdu or
526 * in response to target's NOPIN w/ TTT != FFFFFFFF
527 *
528 * prepare and post a nopout request WQE to CNIC firmware
529 */
530 int bnx2i_send_iscsi_nopout(struct bnx2i_conn *bnx2i_conn,
531 struct iscsi_task *task,
532 char *datap, int data_len, int unsol)
533 {
534 struct bnx2i_endpoint *ep = bnx2i_conn->ep;
535 struct bnx2i_nop_out_request *nopout_wqe;
536 struct iscsi_nopout *nopout_hdr;
537
538 nopout_hdr = (struct iscsi_nopout *)task->hdr;
539 nopout_wqe = (struct bnx2i_nop_out_request *)ep->qp.sq_prod_qe;
540
541 memset(nopout_wqe, 0x00, sizeof(struct bnx2i_nop_out_request));
542
543 nopout_wqe->op_code = nopout_hdr->opcode;
544 nopout_wqe->op_attr = ISCSI_FLAG_CMD_FINAL;
545 memcpy(nopout_wqe->lun, &nopout_hdr->lun, 8);
546
547 /* 57710 requires LUN field to be swapped */
548 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
549 swap(nopout_wqe->lun[0], nopout_wqe->lun[1]);
550
551 nopout_wqe->itt = ((u16)task->itt |
552 (ISCSI_TASK_TYPE_MPATH <<
553 ISCSI_TMF_REQUEST_TYPE_SHIFT));
554 nopout_wqe->ttt = be32_to_cpu(nopout_hdr->ttt);
555 nopout_wqe->flags = 0;
556 if (!unsol)
557 nopout_wqe->flags = ISCSI_NOP_OUT_REQUEST_LOCAL_COMPLETION;
558 else if (nopout_hdr->itt == RESERVED_ITT)
559 nopout_wqe->flags = ISCSI_NOP_OUT_REQUEST_LOCAL_COMPLETION;
560
561 nopout_wqe->cmd_sn = be32_to_cpu(nopout_hdr->cmdsn);
562 nopout_wqe->data_length = data_len;
563 if (data_len) {
564 /* handle payload data, not required in first release */
565 printk(KERN_ALERT "NOPOUT: WARNING!! payload len != 0\n");
566 } else {
567 nopout_wqe->bd_list_addr_lo = (u32)
568 bnx2i_conn->hba->mp_bd_dma;
569 nopout_wqe->bd_list_addr_hi =
570 (u32) ((u64) bnx2i_conn->hba->mp_bd_dma >> 32);
571 nopout_wqe->num_bds = 1;
572 }
573 nopout_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
574
575 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
576 return 0;
577 }
578
579
580 /**
581 * bnx2i_send_iscsi_logout - post iSCSI logout request WQE to hardware
582 * @conn: iscsi connection
583 * @cmd: driver command structure which is requesting
584 * a WQE to sent to chip for further processing
585 *
586 * prepare and post logout request WQE to CNIC firmware
587 */
588 int bnx2i_send_iscsi_logout(struct bnx2i_conn *bnx2i_conn,
589 struct iscsi_task *task)
590 {
591 struct bnx2i_logout_request *logout_wqe;
592 struct iscsi_logout *logout_hdr;
593
594 logout_hdr = (struct iscsi_logout *)task->hdr;
595
596 logout_wqe = (struct bnx2i_logout_request *)
597 bnx2i_conn->ep->qp.sq_prod_qe;
598 memset(logout_wqe, 0x00, sizeof(struct bnx2i_logout_request));
599
600 logout_wqe->op_code = logout_hdr->opcode;
601 logout_wqe->cmd_sn = be32_to_cpu(logout_hdr->cmdsn);
602 logout_wqe->op_attr =
603 logout_hdr->flags | ISCSI_LOGOUT_REQUEST_ALWAYS_ONE;
604 logout_wqe->itt = ((u16)task->itt |
605 (ISCSI_TASK_TYPE_MPATH <<
606 ISCSI_LOGOUT_REQUEST_TYPE_SHIFT));
607 logout_wqe->data_length = 0;
608 logout_wqe->cid = 0;
609
610 logout_wqe->bd_list_addr_lo = (u32) bnx2i_conn->hba->mp_bd_dma;
611 logout_wqe->bd_list_addr_hi = (u32)
612 ((u64) bnx2i_conn->hba->mp_bd_dma >> 32);
613 logout_wqe->num_bds = 1;
614 logout_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
615
616 bnx2i_conn->ep->state = EP_STATE_LOGOUT_SENT;
617
618 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
619 return 0;
620 }
621
622
623 /**
624 * bnx2i_update_iscsi_conn - post iSCSI logout request WQE to hardware
625 * @conn: iscsi connection which requires iscsi parameter update
626 *
627 * sends down iSCSI Conn Update request to move iSCSI conn to FFP
628 */
629 void bnx2i_update_iscsi_conn(struct iscsi_conn *conn)
630 {
631 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
632 struct bnx2i_hba *hba = bnx2i_conn->hba;
633 struct kwqe *kwqe_arr[2];
634 struct iscsi_kwqe_conn_update *update_wqe;
635 struct iscsi_kwqe_conn_update conn_update_kwqe;
636
637 update_wqe = &conn_update_kwqe;
638
639 update_wqe->hdr.op_code = ISCSI_KWQE_OPCODE_UPDATE_CONN;
640 update_wqe->hdr.flags =
641 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
642
643 /* 5771x requires conn context id to be passed as is */
644 if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_conn->ep->hba->cnic_dev_type))
645 update_wqe->context_id = bnx2i_conn->ep->ep_cid;
646 else
647 update_wqe->context_id = (bnx2i_conn->ep->ep_cid >> 7);
648 update_wqe->conn_flags = 0;
649 if (conn->hdrdgst_en)
650 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_HEADER_DIGEST;
651 if (conn->datadgst_en)
652 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_DATA_DIGEST;
653 if (conn->session->initial_r2t_en)
654 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_INITIAL_R2T;
655 if (conn->session->imm_data_en)
656 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_IMMEDIATE_DATA;
657
658 update_wqe->max_send_pdu_length = conn->max_xmit_dlength;
659 update_wqe->max_recv_pdu_length = conn->max_recv_dlength;
660 update_wqe->first_burst_length = conn->session->first_burst;
661 update_wqe->max_burst_length = conn->session->max_burst;
662 update_wqe->exp_stat_sn = conn->exp_statsn;
663 update_wqe->max_outstanding_r2ts = conn->session->max_r2t;
664 update_wqe->session_error_recovery_level = conn->session->erl;
665 iscsi_conn_printk(KERN_ALERT, conn,
666 "bnx2i: conn update - MBL 0x%x FBL 0x%x"
667 "MRDSL_I 0x%x MRDSL_T 0x%x \n",
668 update_wqe->max_burst_length,
669 update_wqe->first_burst_length,
670 update_wqe->max_recv_pdu_length,
671 update_wqe->max_send_pdu_length);
672
673 kwqe_arr[0] = (struct kwqe *) update_wqe;
674 if (hba->cnic && hba->cnic->submit_kwqes)
675 hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 1);
676 }
677
678
679 /**
680 * bnx2i_ep_ofld_timer - post iSCSI logout request WQE to hardware
681 * @data: endpoint (transport handle) structure pointer
682 *
683 * routine to handle connection offload/destroy request timeout
684 */
685 void bnx2i_ep_ofld_timer(struct timer_list *t)
686 {
687 struct bnx2i_endpoint *ep = from_timer(ep, t, ofld_timer);
688
689 if (ep->state == EP_STATE_OFLD_START) {
690 printk(KERN_ALERT "ofld_timer: CONN_OFLD timeout\n");
691 ep->state = EP_STATE_OFLD_FAILED;
692 } else if (ep->state == EP_STATE_DISCONN_START) {
693 printk(KERN_ALERT "ofld_timer: CONN_DISCON timeout\n");
694 ep->state = EP_STATE_DISCONN_TIMEDOUT;
695 } else if (ep->state == EP_STATE_CLEANUP_START) {
696 printk(KERN_ALERT "ofld_timer: CONN_CLEANUP timeout\n");
697 ep->state = EP_STATE_CLEANUP_FAILED;
698 }
699
700 wake_up_interruptible(&ep->ofld_wait);
701 }
702
703
704 static int bnx2i_power_of2(u32 val)
705 {
706 u32 power = 0;
707 if (val & (val - 1))
708 return power;
709 val--;
710 while (val) {
711 val = val >> 1;
712 power++;
713 }
714 return power;
715 }
716
717
718 /**
719 * bnx2i_send_cmd_cleanup_req - send iscsi cmd context clean-up request
720 * @hba: adapter structure pointer
721 * @cmd: driver command structure which is requesting
722 * a WQE to sent to chip for further processing
723 *
724 * prepares and posts CONN_OFLD_REQ1/2 KWQE
725 */
726 void bnx2i_send_cmd_cleanup_req(struct bnx2i_hba *hba, struct bnx2i_cmd *cmd)
727 {
728 struct bnx2i_cleanup_request *cmd_cleanup;
729
730 cmd_cleanup =
731 (struct bnx2i_cleanup_request *)cmd->conn->ep->qp.sq_prod_qe;
732 memset(cmd_cleanup, 0x00, sizeof(struct bnx2i_cleanup_request));
733
734 cmd_cleanup->op_code = ISCSI_OPCODE_CLEANUP_REQUEST;
735 cmd_cleanup->itt = cmd->req.itt;
736 cmd_cleanup->cq_index = 0; /* CQ# used for completion, 5771x only */
737
738 bnx2i_ring_dbell_update_sq_params(cmd->conn, 1);
739 }
740
741
742 /**
743 * bnx2i_send_conn_destroy - initiates iscsi connection teardown process
744 * @hba: adapter structure pointer
745 * @ep: endpoint (transport identifier) structure
746 *
747 * this routine prepares and posts CONN_OFLD_REQ1/2 KWQE to initiate
748 * iscsi connection context clean-up process
749 */
750 int bnx2i_send_conn_destroy(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
751 {
752 struct kwqe *kwqe_arr[2];
753 struct iscsi_kwqe_conn_destroy conn_cleanup;
754 int rc = -EINVAL;
755
756 memset(&conn_cleanup, 0x00, sizeof(struct iscsi_kwqe_conn_destroy));
757
758 conn_cleanup.hdr.op_code = ISCSI_KWQE_OPCODE_DESTROY_CONN;
759 conn_cleanup.hdr.flags =
760 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
761 /* 5771x requires conn context id to be passed as is */
762 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
763 conn_cleanup.context_id = ep->ep_cid;
764 else
765 conn_cleanup.context_id = (ep->ep_cid >> 7);
766
767 conn_cleanup.reserved0 = (u16)ep->ep_iscsi_cid;
768
769 kwqe_arr[0] = (struct kwqe *) &conn_cleanup;
770 if (hba->cnic && hba->cnic->submit_kwqes)
771 rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 1);
772
773 return rc;
774 }
775
776
777 /**
778 * bnx2i_570x_send_conn_ofld_req - initiates iscsi conn context setup process
779 * @hba: adapter structure pointer
780 * @ep: endpoint (transport identifier) structure
781 *
782 * 5706/5708/5709 specific - prepares and posts CONN_OFLD_REQ1/2 KWQE
783 */
784 static int bnx2i_570x_send_conn_ofld_req(struct bnx2i_hba *hba,
785 struct bnx2i_endpoint *ep)
786 {
787 struct kwqe *kwqe_arr[2];
788 struct iscsi_kwqe_conn_offload1 ofld_req1;
789 struct iscsi_kwqe_conn_offload2 ofld_req2;
790 dma_addr_t dma_addr;
791 int num_kwqes = 2;
792 u32 *ptbl;
793 int rc = -EINVAL;
794
795 ofld_req1.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN1;
796 ofld_req1.hdr.flags =
797 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
798
799 ofld_req1.iscsi_conn_id = (u16) ep->ep_iscsi_cid;
800
801 dma_addr = ep->qp.sq_pgtbl_phys;
802 ofld_req1.sq_page_table_addr_lo = (u32) dma_addr;
803 ofld_req1.sq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
804
805 dma_addr = ep->qp.cq_pgtbl_phys;
806 ofld_req1.cq_page_table_addr_lo = (u32) dma_addr;
807 ofld_req1.cq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
808
809 ofld_req2.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN2;
810 ofld_req2.hdr.flags =
811 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
812
813 dma_addr = ep->qp.rq_pgtbl_phys;
814 ofld_req2.rq_page_table_addr_lo = (u32) dma_addr;
815 ofld_req2.rq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
816
817 ptbl = (u32 *) ep->qp.sq_pgtbl_virt;
818
819 ofld_req2.sq_first_pte.hi = *ptbl++;
820 ofld_req2.sq_first_pte.lo = *ptbl;
821
822 ptbl = (u32 *) ep->qp.cq_pgtbl_virt;
823 ofld_req2.cq_first_pte.hi = *ptbl++;
824 ofld_req2.cq_first_pte.lo = *ptbl;
825
826 kwqe_arr[0] = (struct kwqe *) &ofld_req1;
827 kwqe_arr[1] = (struct kwqe *) &ofld_req2;
828 ofld_req2.num_additional_wqes = 0;
829
830 if (hba->cnic && hba->cnic->submit_kwqes)
831 rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, num_kwqes);
832
833 return rc;
834 }
835
836
837 /**
838 * bnx2i_5771x_send_conn_ofld_req - initiates iscsi connection context creation
839 * @hba: adapter structure pointer
840 * @ep: endpoint (transport identifier) structure
841 *
842 * 57710 specific - prepares and posts CONN_OFLD_REQ1/2 KWQE
843 */
844 static int bnx2i_5771x_send_conn_ofld_req(struct bnx2i_hba *hba,
845 struct bnx2i_endpoint *ep)
846 {
847 struct kwqe *kwqe_arr[5];
848 struct iscsi_kwqe_conn_offload1 ofld_req1;
849 struct iscsi_kwqe_conn_offload2 ofld_req2;
850 struct iscsi_kwqe_conn_offload3 ofld_req3[1];
851 dma_addr_t dma_addr;
852 int num_kwqes = 2;
853 u32 *ptbl;
854 int rc = -EINVAL;
855
856 ofld_req1.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN1;
857 ofld_req1.hdr.flags =
858 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
859
860 ofld_req1.iscsi_conn_id = (u16) ep->ep_iscsi_cid;
861
862 dma_addr = ep->qp.sq_pgtbl_phys + ISCSI_SQ_DB_SIZE;
863 ofld_req1.sq_page_table_addr_lo = (u32) dma_addr;
864 ofld_req1.sq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
865
866 dma_addr = ep->qp.cq_pgtbl_phys + ISCSI_CQ_DB_SIZE;
867 ofld_req1.cq_page_table_addr_lo = (u32) dma_addr;
868 ofld_req1.cq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
869
870 ofld_req2.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN2;
871 ofld_req2.hdr.flags =
872 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
873
874 dma_addr = ep->qp.rq_pgtbl_phys + ISCSI_RQ_DB_SIZE;
875 ofld_req2.rq_page_table_addr_lo = (u32) dma_addr;
876 ofld_req2.rq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
877
878 ptbl = (u32 *)((u8 *)ep->qp.sq_pgtbl_virt + ISCSI_SQ_DB_SIZE);
879 ofld_req2.sq_first_pte.hi = *ptbl++;
880 ofld_req2.sq_first_pte.lo = *ptbl;
881
882 ptbl = (u32 *)((u8 *)ep->qp.cq_pgtbl_virt + ISCSI_CQ_DB_SIZE);
883 ofld_req2.cq_first_pte.hi = *ptbl++;
884 ofld_req2.cq_first_pte.lo = *ptbl;
885
886 kwqe_arr[0] = (struct kwqe *) &ofld_req1;
887 kwqe_arr[1] = (struct kwqe *) &ofld_req2;
888
889 ofld_req2.num_additional_wqes = 1;
890 memset(ofld_req3, 0x00, sizeof(ofld_req3[0]));
891 ptbl = (u32 *)((u8 *)ep->qp.rq_pgtbl_virt + ISCSI_RQ_DB_SIZE);
892 ofld_req3[0].qp_first_pte[0].hi = *ptbl++;
893 ofld_req3[0].qp_first_pte[0].lo = *ptbl;
894
895 kwqe_arr[2] = (struct kwqe *) ofld_req3;
896 /* need if we decide to go with multiple KCQE's per conn */
897 num_kwqes += 1;
898
899 if (hba->cnic && hba->cnic->submit_kwqes)
900 rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, num_kwqes);
901
902 return rc;
903 }
904
905 /**
906 * bnx2i_send_conn_ofld_req - initiates iscsi connection context setup process
907 *
908 * @hba: adapter structure pointer
909 * @ep: endpoint (transport identifier) structure
910 *
911 * this routine prepares and posts CONN_OFLD_REQ1/2 KWQE
912 */
913 int bnx2i_send_conn_ofld_req(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
914 {
915 int rc;
916
917 if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type))
918 rc = bnx2i_5771x_send_conn_ofld_req(hba, ep);
919 else
920 rc = bnx2i_570x_send_conn_ofld_req(hba, ep);
921
922 return rc;
923 }
924
925
926 /**
927 * setup_qp_page_tables - iscsi QP page table setup function
928 * @ep: endpoint (transport identifier) structure
929 *
930 * Sets up page tables for SQ/RQ/CQ, 1G/sec (5706/5708/5709) devices requires
931 * 64-bit address in big endian format. Whereas 10G/sec (57710) requires
932 * PT in little endian format
933 */
934 static void setup_qp_page_tables(struct bnx2i_endpoint *ep)
935 {
936 int num_pages;
937 u32 *ptbl;
938 dma_addr_t page;
939 int cnic_dev_10g;
940
941 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
942 cnic_dev_10g = 1;
943 else
944 cnic_dev_10g = 0;
945
946 /* SQ page table */
947 memset(ep->qp.sq_pgtbl_virt, 0, ep->qp.sq_pgtbl_size);
948 num_pages = ep->qp.sq_mem_size / CNIC_PAGE_SIZE;
949 page = ep->qp.sq_phys;
950
951 if (cnic_dev_10g)
952 ptbl = (u32 *)((u8 *)ep->qp.sq_pgtbl_virt + ISCSI_SQ_DB_SIZE);
953 else
954 ptbl = (u32 *) ep->qp.sq_pgtbl_virt;
955 while (num_pages--) {
956 if (cnic_dev_10g) {
957 /* PTE is written in little endian format for 57710 */
958 *ptbl = (u32) page;
959 ptbl++;
960 *ptbl = (u32) ((u64) page >> 32);
961 ptbl++;
962 page += CNIC_PAGE_SIZE;
963 } else {
964 /* PTE is written in big endian format for
965 * 5706/5708/5709 devices */
966 *ptbl = (u32) ((u64) page >> 32);
967 ptbl++;
968 *ptbl = (u32) page;
969 ptbl++;
970 page += CNIC_PAGE_SIZE;
971 }
972 }
973
974 /* RQ page table */
975 memset(ep->qp.rq_pgtbl_virt, 0, ep->qp.rq_pgtbl_size);
976 num_pages = ep->qp.rq_mem_size / CNIC_PAGE_SIZE;
977 page = ep->qp.rq_phys;
978
979 if (cnic_dev_10g)
980 ptbl = (u32 *)((u8 *)ep->qp.rq_pgtbl_virt + ISCSI_RQ_DB_SIZE);
981 else
982 ptbl = (u32 *) ep->qp.rq_pgtbl_virt;
983 while (num_pages--) {
984 if (cnic_dev_10g) {
985 /* PTE is written in little endian format for 57710 */
986 *ptbl = (u32) page;
987 ptbl++;
988 *ptbl = (u32) ((u64) page >> 32);
989 ptbl++;
990 page += CNIC_PAGE_SIZE;
991 } else {
992 /* PTE is written in big endian format for
993 * 5706/5708/5709 devices */
994 *ptbl = (u32) ((u64) page >> 32);
995 ptbl++;
996 *ptbl = (u32) page;
997 ptbl++;
998 page += CNIC_PAGE_SIZE;
999 }
1000 }
1001
1002 /* CQ page table */
1003 memset(ep->qp.cq_pgtbl_virt, 0, ep->qp.cq_pgtbl_size);
1004 num_pages = ep->qp.cq_mem_size / CNIC_PAGE_SIZE;
1005 page = ep->qp.cq_phys;
1006
1007 if (cnic_dev_10g)
1008 ptbl = (u32 *)((u8 *)ep->qp.cq_pgtbl_virt + ISCSI_CQ_DB_SIZE);
1009 else
1010 ptbl = (u32 *) ep->qp.cq_pgtbl_virt;
1011 while (num_pages--) {
1012 if (cnic_dev_10g) {
1013 /* PTE is written in little endian format for 57710 */
1014 *ptbl = (u32) page;
1015 ptbl++;
1016 *ptbl = (u32) ((u64) page >> 32);
1017 ptbl++;
1018 page += CNIC_PAGE_SIZE;
1019 } else {
1020 /* PTE is written in big endian format for
1021 * 5706/5708/5709 devices */
1022 *ptbl = (u32) ((u64) page >> 32);
1023 ptbl++;
1024 *ptbl = (u32) page;
1025 ptbl++;
1026 page += CNIC_PAGE_SIZE;
1027 }
1028 }
1029 }
1030
1031
1032 /**
1033 * bnx2i_alloc_qp_resc - allocates required resources for QP.
1034 * @hba: adapter structure pointer
1035 * @ep: endpoint (transport identifier) structure
1036 *
1037 * Allocate QP (transport layer for iSCSI connection) resources, DMA'able
1038 * memory for SQ/RQ/CQ and page tables. EP structure elements such
1039 * as producer/consumer indexes/pointers, queue sizes and page table
1040 * contents are setup
1041 */
1042 int bnx2i_alloc_qp_resc(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
1043 {
1044 struct bnx2i_5771x_cq_db *cq_db;
1045
1046 ep->hba = hba;
1047 ep->conn = NULL;
1048 ep->ep_cid = ep->ep_iscsi_cid = ep->ep_pg_cid = 0;
1049
1050 /* Allocate page table memory for SQ which is page aligned */
1051 ep->qp.sq_mem_size = hba->max_sqes * BNX2I_SQ_WQE_SIZE;
1052 ep->qp.sq_mem_size =
1053 (ep->qp.sq_mem_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK;
1054 ep->qp.sq_pgtbl_size =
1055 (ep->qp.sq_mem_size / CNIC_PAGE_SIZE) * sizeof(void *);
1056 ep->qp.sq_pgtbl_size =
1057 (ep->qp.sq_pgtbl_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK;
1058
1059 ep->qp.sq_pgtbl_virt =
1060 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.sq_pgtbl_size,
1061 &ep->qp.sq_pgtbl_phys, GFP_KERNEL);
1062 if (!ep->qp.sq_pgtbl_virt) {
1063 printk(KERN_ALERT "bnx2i: unable to alloc SQ PT mem (%d)\n",
1064 ep->qp.sq_pgtbl_size);
1065 goto mem_alloc_err;
1066 }
1067
1068 /* Allocate memory area for actual SQ element */
1069 ep->qp.sq_virt =
1070 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.sq_mem_size,
1071 &ep->qp.sq_phys, GFP_KERNEL);
1072 if (!ep->qp.sq_virt) {
1073 printk(KERN_ALERT "bnx2i: unable to alloc SQ BD memory %d\n",
1074 ep->qp.sq_mem_size);
1075 goto mem_alloc_err;
1076 }
1077
1078 ep->qp.sq_first_qe = ep->qp.sq_virt;
1079 ep->qp.sq_prod_qe = ep->qp.sq_first_qe;
1080 ep->qp.sq_cons_qe = ep->qp.sq_first_qe;
1081 ep->qp.sq_last_qe = &ep->qp.sq_first_qe[hba->max_sqes - 1];
1082 ep->qp.sq_prod_idx = 0;
1083 ep->qp.sq_cons_idx = 0;
1084 ep->qp.sqe_left = hba->max_sqes;
1085
1086 /* Allocate page table memory for CQ which is page aligned */
1087 ep->qp.cq_mem_size = hba->max_cqes * BNX2I_CQE_SIZE;
1088 ep->qp.cq_mem_size =
1089 (ep->qp.cq_mem_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK;
1090 ep->qp.cq_pgtbl_size =
1091 (ep->qp.cq_mem_size / CNIC_PAGE_SIZE) * sizeof(void *);
1092 ep->qp.cq_pgtbl_size =
1093 (ep->qp.cq_pgtbl_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK;
1094
1095 ep->qp.cq_pgtbl_virt =
1096 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.cq_pgtbl_size,
1097 &ep->qp.cq_pgtbl_phys, GFP_KERNEL);
1098 if (!ep->qp.cq_pgtbl_virt) {
1099 printk(KERN_ALERT "bnx2i: unable to alloc CQ PT memory %d\n",
1100 ep->qp.cq_pgtbl_size);
1101 goto mem_alloc_err;
1102 }
1103
1104 /* Allocate memory area for actual CQ element */
1105 ep->qp.cq_virt =
1106 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.cq_mem_size,
1107 &ep->qp.cq_phys, GFP_KERNEL);
1108 if (!ep->qp.cq_virt) {
1109 printk(KERN_ALERT "bnx2i: unable to alloc CQ BD memory %d\n",
1110 ep->qp.cq_mem_size);
1111 goto mem_alloc_err;
1112 }
1113
1114 ep->qp.cq_first_qe = ep->qp.cq_virt;
1115 ep->qp.cq_prod_qe = ep->qp.cq_first_qe;
1116 ep->qp.cq_cons_qe = ep->qp.cq_first_qe;
1117 ep->qp.cq_last_qe = &ep->qp.cq_first_qe[hba->max_cqes - 1];
1118 ep->qp.cq_prod_idx = 0;
1119 ep->qp.cq_cons_idx = 0;
1120 ep->qp.cqe_left = hba->max_cqes;
1121 ep->qp.cqe_exp_seq_sn = ISCSI_INITIAL_SN;
1122 ep->qp.cqe_size = hba->max_cqes;
1123
1124 /* Invalidate all EQ CQE index, req only for 57710 */
1125 cq_db = (struct bnx2i_5771x_cq_db *) ep->qp.cq_pgtbl_virt;
1126 memset(cq_db->sqn, 0xFF, sizeof(cq_db->sqn[0]) * BNX2X_MAX_CQS);
1127
1128 /* Allocate page table memory for RQ which is page aligned */
1129 ep->qp.rq_mem_size = hba->max_rqes * BNX2I_RQ_WQE_SIZE;
1130 ep->qp.rq_mem_size =
1131 (ep->qp.rq_mem_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK;
1132 ep->qp.rq_pgtbl_size =
1133 (ep->qp.rq_mem_size / CNIC_PAGE_SIZE) * sizeof(void *);
1134 ep->qp.rq_pgtbl_size =
1135 (ep->qp.rq_pgtbl_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK;
1136
1137 ep->qp.rq_pgtbl_virt =
1138 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.rq_pgtbl_size,
1139 &ep->qp.rq_pgtbl_phys, GFP_KERNEL);
1140 if (!ep->qp.rq_pgtbl_virt) {
1141 printk(KERN_ALERT "bnx2i: unable to alloc RQ PT mem %d\n",
1142 ep->qp.rq_pgtbl_size);
1143 goto mem_alloc_err;
1144 }
1145
1146 /* Allocate memory area for actual RQ element */
1147 ep->qp.rq_virt =
1148 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.rq_mem_size,
1149 &ep->qp.rq_phys, GFP_KERNEL);
1150 if (!ep->qp.rq_virt) {
1151 printk(KERN_ALERT "bnx2i: unable to alloc RQ BD memory %d\n",
1152 ep->qp.rq_mem_size);
1153 goto mem_alloc_err;
1154 }
1155
1156 ep->qp.rq_first_qe = ep->qp.rq_virt;
1157 ep->qp.rq_prod_qe = ep->qp.rq_first_qe;
1158 ep->qp.rq_cons_qe = ep->qp.rq_first_qe;
1159 ep->qp.rq_last_qe = &ep->qp.rq_first_qe[hba->max_rqes - 1];
1160 ep->qp.rq_prod_idx = 0x8000;
1161 ep->qp.rq_cons_idx = 0;
1162 ep->qp.rqe_left = hba->max_rqes;
1163
1164 setup_qp_page_tables(ep);
1165
1166 return 0;
1167
1168 mem_alloc_err:
1169 bnx2i_free_qp_resc(hba, ep);
1170 return -ENOMEM;
1171 }
1172
1173
1174
1175 /**
1176 * bnx2i_free_qp_resc - free memory resources held by QP
1177 * @hba: adapter structure pointer
1178 * @ep: endpoint (transport identifier) structure
1179 *
1180 * Free QP resources - SQ/RQ/CQ memory and page tables.
1181 */
1182 void bnx2i_free_qp_resc(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
1183 {
1184 if (ep->qp.ctx_base) {
1185 iounmap(ep->qp.ctx_base);
1186 ep->qp.ctx_base = NULL;
1187 }
1188 /* Free SQ mem */
1189 if (ep->qp.sq_pgtbl_virt) {
1190 dma_free_coherent(&hba->pcidev->dev, ep->qp.sq_pgtbl_size,
1191 ep->qp.sq_pgtbl_virt, ep->qp.sq_pgtbl_phys);
1192 ep->qp.sq_pgtbl_virt = NULL;
1193 ep->qp.sq_pgtbl_phys = 0;
1194 }
1195 if (ep->qp.sq_virt) {
1196 dma_free_coherent(&hba->pcidev->dev, ep->qp.sq_mem_size,
1197 ep->qp.sq_virt, ep->qp.sq_phys);
1198 ep->qp.sq_virt = NULL;
1199 ep->qp.sq_phys = 0;
1200 }
1201
1202 /* Free RQ mem */
1203 if (ep->qp.rq_pgtbl_virt) {
1204 dma_free_coherent(&hba->pcidev->dev, ep->qp.rq_pgtbl_size,
1205 ep->qp.rq_pgtbl_virt, ep->qp.rq_pgtbl_phys);
1206 ep->qp.rq_pgtbl_virt = NULL;
1207 ep->qp.rq_pgtbl_phys = 0;
1208 }
1209 if (ep->qp.rq_virt) {
1210 dma_free_coherent(&hba->pcidev->dev, ep->qp.rq_mem_size,
1211 ep->qp.rq_virt, ep->qp.rq_phys);
1212 ep->qp.rq_virt = NULL;
1213 ep->qp.rq_phys = 0;
1214 }
1215
1216 /* Free CQ mem */
1217 if (ep->qp.cq_pgtbl_virt) {
1218 dma_free_coherent(&hba->pcidev->dev, ep->qp.cq_pgtbl_size,
1219 ep->qp.cq_pgtbl_virt, ep->qp.cq_pgtbl_phys);
1220 ep->qp.cq_pgtbl_virt = NULL;
1221 ep->qp.cq_pgtbl_phys = 0;
1222 }
1223 if (ep->qp.cq_virt) {
1224 dma_free_coherent(&hba->pcidev->dev, ep->qp.cq_mem_size,
1225 ep->qp.cq_virt, ep->qp.cq_phys);
1226 ep->qp.cq_virt = NULL;
1227 ep->qp.cq_phys = 0;
1228 }
1229 }
1230
1231
1232 /**
1233 * bnx2i_send_fw_iscsi_init_msg - initiates initial handshake with iscsi f/w
1234 * @hba: adapter structure pointer
1235 *
1236 * Send down iscsi_init KWQEs which initiates the initial handshake with the f/w
1237 * This results in iSCSi support validation and on-chip context manager
1238 * initialization. Firmware completes this handshake with a CQE carrying
1239 * the result of iscsi support validation. Parameter carried by
1240 * iscsi init request determines the number of offloaded connection and
1241 * tolerance level for iscsi protocol violation this hba/chip can support
1242 */
1243 int bnx2i_send_fw_iscsi_init_msg(struct bnx2i_hba *hba)
1244 {
1245 struct kwqe *kwqe_arr[3];
1246 struct iscsi_kwqe_init1 iscsi_init;
1247 struct iscsi_kwqe_init2 iscsi_init2;
1248 int rc = 0;
1249 u64 mask64;
1250
1251 memset(&iscsi_init, 0x00, sizeof(struct iscsi_kwqe_init1));
1252 memset(&iscsi_init2, 0x00, sizeof(struct iscsi_kwqe_init2));
1253
1254 bnx2i_adjust_qp_size(hba);
1255
1256 iscsi_init.flags =
1257 (CNIC_PAGE_BITS - 8) << ISCSI_KWQE_INIT1_PAGE_SIZE_SHIFT;
1258 if (en_tcp_dack)
1259 iscsi_init.flags |= ISCSI_KWQE_INIT1_DELAYED_ACK_ENABLE;
1260 iscsi_init.reserved0 = 0;
1261 iscsi_init.num_cqs = 1;
1262 iscsi_init.hdr.op_code = ISCSI_KWQE_OPCODE_INIT1;
1263 iscsi_init.hdr.flags =
1264 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
1265
1266 iscsi_init.dummy_buffer_addr_lo = (u32) hba->dummy_buf_dma;
1267 iscsi_init.dummy_buffer_addr_hi =
1268 (u32) ((u64) hba->dummy_buf_dma >> 32);
1269
1270 hba->num_ccell = hba->max_sqes >> 1;
1271 hba->ctx_ccell_tasks =
1272 ((hba->num_ccell & 0xFFFF) | (hba->max_sqes << 16));
1273 iscsi_init.num_ccells_per_conn = hba->num_ccell;
1274 iscsi_init.num_tasks_per_conn = hba->max_sqes;
1275 iscsi_init.sq_wqes_per_page = CNIC_PAGE_SIZE / BNX2I_SQ_WQE_SIZE;
1276 iscsi_init.sq_num_wqes = hba->max_sqes;
1277 iscsi_init.cq_log_wqes_per_page =
1278 (u8) bnx2i_power_of2(CNIC_PAGE_SIZE / BNX2I_CQE_SIZE);
1279 iscsi_init.cq_num_wqes = hba->max_cqes;
1280 iscsi_init.cq_num_pages = (hba->max_cqes * BNX2I_CQE_SIZE +
1281 (CNIC_PAGE_SIZE - 1)) / CNIC_PAGE_SIZE;
1282 iscsi_init.sq_num_pages = (hba->max_sqes * BNX2I_SQ_WQE_SIZE +
1283 (CNIC_PAGE_SIZE - 1)) / CNIC_PAGE_SIZE;
1284 iscsi_init.rq_buffer_size = BNX2I_RQ_WQE_SIZE;
1285 iscsi_init.rq_num_wqes = hba->max_rqes;
1286
1287
1288 iscsi_init2.hdr.op_code = ISCSI_KWQE_OPCODE_INIT2;
1289 iscsi_init2.hdr.flags =
1290 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
1291 iscsi_init2.max_cq_sqn = hba->max_cqes * 2 + 1;
1292 mask64 = 0x0ULL;
1293 mask64 |= (
1294 /* CISCO MDS */
1295 (1UL <<
1296 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_NOT_RSRV) |
1297 /* HP MSA1510i */
1298 (1UL <<
1299 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_EXP_DATASN) |
1300 /* EMC */
1301 (1ULL << ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_LUN));
1302 if (error_mask1) {
1303 iscsi_init2.error_bit_map[0] = error_mask1;
1304 mask64 ^= (u32)(mask64);
1305 mask64 |= error_mask1;
1306 } else
1307 iscsi_init2.error_bit_map[0] = (u32) mask64;
1308
1309 if (error_mask2) {
1310 iscsi_init2.error_bit_map[1] = error_mask2;
1311 mask64 &= 0xffffffff;
1312 mask64 |= ((u64)error_mask2 << 32);
1313 } else
1314 iscsi_init2.error_bit_map[1] = (u32) (mask64 >> 32);
1315
1316 iscsi_error_mask = mask64;
1317
1318 kwqe_arr[0] = (struct kwqe *) &iscsi_init;
1319 kwqe_arr[1] = (struct kwqe *) &iscsi_init2;
1320
1321 if (hba->cnic && hba->cnic->submit_kwqes)
1322 rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 2);
1323 return rc;
1324 }
1325
1326
1327 /**
1328 * bnx2i_process_scsi_cmd_resp - this function handles scsi cmd completion.
1329 * @session: iscsi session
1330 * @bnx2i_conn: bnx2i connection
1331 * @cqe: pointer to newly DMA'ed CQE entry for processing
1332 *
1333 * process SCSI CMD Response CQE & complete the request to SCSI-ML
1334 */
1335 int bnx2i_process_scsi_cmd_resp(struct iscsi_session *session,
1336 struct bnx2i_conn *bnx2i_conn,
1337 struct cqe *cqe)
1338 {
1339 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1340 struct bnx2i_hba *hba = bnx2i_conn->hba;
1341 struct bnx2i_cmd_response *resp_cqe;
1342 struct bnx2i_cmd *bnx2i_cmd;
1343 struct iscsi_task *task;
1344 struct iscsi_scsi_rsp *hdr;
1345 u32 datalen = 0;
1346
1347 resp_cqe = (struct bnx2i_cmd_response *)cqe;
1348 spin_lock_bh(&session->back_lock);
1349 task = iscsi_itt_to_task(conn,
1350 resp_cqe->itt & ISCSI_CMD_RESPONSE_INDEX);
1351 if (!task)
1352 goto fail;
1353
1354 bnx2i_cmd = task->dd_data;
1355
1356 if (bnx2i_cmd->req.op_attr & ISCSI_CMD_REQUEST_READ) {
1357 conn->datain_pdus_cnt +=
1358 resp_cqe->task_stat.read_stat.num_data_ins;
1359 conn->rxdata_octets +=
1360 bnx2i_cmd->req.total_data_transfer_length;
1361 ADD_STATS_64(hba, rx_pdus,
1362 resp_cqe->task_stat.read_stat.num_data_ins);
1363 ADD_STATS_64(hba, rx_bytes,
1364 bnx2i_cmd->req.total_data_transfer_length);
1365 } else {
1366 conn->dataout_pdus_cnt +=
1367 resp_cqe->task_stat.write_stat.num_data_outs;
1368 conn->r2t_pdus_cnt +=
1369 resp_cqe->task_stat.write_stat.num_r2ts;
1370 conn->txdata_octets +=
1371 bnx2i_cmd->req.total_data_transfer_length;
1372 ADD_STATS_64(hba, tx_pdus,
1373 resp_cqe->task_stat.write_stat.num_data_outs);
1374 ADD_STATS_64(hba, tx_bytes,
1375 bnx2i_cmd->req.total_data_transfer_length);
1376 ADD_STATS_64(hba, rx_pdus,
1377 resp_cqe->task_stat.write_stat.num_r2ts);
1378 }
1379 bnx2i_iscsi_unmap_sg_list(bnx2i_cmd);
1380
1381 hdr = (struct iscsi_scsi_rsp *)task->hdr;
1382 resp_cqe = (struct bnx2i_cmd_response *)cqe;
1383 hdr->opcode = resp_cqe->op_code;
1384 hdr->max_cmdsn = cpu_to_be32(resp_cqe->max_cmd_sn);
1385 hdr->exp_cmdsn = cpu_to_be32(resp_cqe->exp_cmd_sn);
1386 hdr->response = resp_cqe->response;
1387 hdr->cmd_status = resp_cqe->status;
1388 hdr->flags = resp_cqe->response_flags;
1389 hdr->residual_count = cpu_to_be32(resp_cqe->residual_count);
1390
1391 if (resp_cqe->op_code == ISCSI_OP_SCSI_DATA_IN)
1392 goto done;
1393
1394 if (resp_cqe->status == SAM_STAT_CHECK_CONDITION) {
1395 datalen = resp_cqe->data_length;
1396 if (datalen < 2)
1397 goto done;
1398
1399 if (datalen > BNX2I_RQ_WQE_SIZE) {
1400 iscsi_conn_printk(KERN_ERR, conn,
1401 "sense data len %d > RQ sz\n",
1402 datalen);
1403 datalen = BNX2I_RQ_WQE_SIZE;
1404 } else if (datalen > ISCSI_DEF_MAX_RECV_SEG_LEN) {
1405 iscsi_conn_printk(KERN_ERR, conn,
1406 "sense data len %d > conn data\n",
1407 datalen);
1408 datalen = ISCSI_DEF_MAX_RECV_SEG_LEN;
1409 }
1410
1411 bnx2i_get_rq_buf(bnx2i_cmd->conn, conn->data, datalen);
1412 bnx2i_put_rq_buf(bnx2i_cmd->conn, 1);
1413 }
1414
1415 done:
1416 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr,
1417 conn->data, datalen);
1418 fail:
1419 spin_unlock_bh(&session->back_lock);
1420 return 0;
1421 }
1422
1423
1424 /**
1425 * bnx2i_process_login_resp - this function handles iscsi login response
1426 * @session: iscsi session pointer
1427 * @bnx2i_conn: iscsi connection pointer
1428 * @cqe: pointer to newly DMA'ed CQE entry for processing
1429 *
1430 * process Login Response CQE & complete it to open-iscsi user daemon
1431 */
1432 static int bnx2i_process_login_resp(struct iscsi_session *session,
1433 struct bnx2i_conn *bnx2i_conn,
1434 struct cqe *cqe)
1435 {
1436 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1437 struct iscsi_task *task;
1438 struct bnx2i_login_response *login;
1439 struct iscsi_login_rsp *resp_hdr;
1440 int pld_len;
1441 int pad_len;
1442
1443 login = (struct bnx2i_login_response *) cqe;
1444 spin_lock(&session->back_lock);
1445 task = iscsi_itt_to_task(conn,
1446 login->itt & ISCSI_LOGIN_RESPONSE_INDEX);
1447 if (!task)
1448 goto done;
1449
1450 resp_hdr = (struct iscsi_login_rsp *) &bnx2i_conn->gen_pdu.resp_hdr;
1451 memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1452 resp_hdr->opcode = login->op_code;
1453 resp_hdr->flags = login->response_flags;
1454 resp_hdr->max_version = login->version_max;
1455 resp_hdr->active_version = login->version_active;
1456 resp_hdr->hlength = 0;
1457
1458 hton24(resp_hdr->dlength, login->data_length);
1459 memcpy(resp_hdr->isid, &login->isid_lo, 6);
1460 resp_hdr->tsih = cpu_to_be16(login->tsih);
1461 resp_hdr->itt = task->hdr->itt;
1462 resp_hdr->statsn = cpu_to_be32(login->stat_sn);
1463 resp_hdr->exp_cmdsn = cpu_to_be32(login->exp_cmd_sn);
1464 resp_hdr->max_cmdsn = cpu_to_be32(login->max_cmd_sn);
1465 resp_hdr->status_class = login->status_class;
1466 resp_hdr->status_detail = login->status_detail;
1467 pld_len = login->data_length;
1468 bnx2i_conn->gen_pdu.resp_wr_ptr =
1469 bnx2i_conn->gen_pdu.resp_buf + pld_len;
1470
1471 pad_len = 0;
1472 if (pld_len & 0x3)
1473 pad_len = 4 - (pld_len % 4);
1474
1475 if (pad_len) {
1476 int i = 0;
1477 for (i = 0; i < pad_len; i++) {
1478 bnx2i_conn->gen_pdu.resp_wr_ptr[0] = 0;
1479 bnx2i_conn->gen_pdu.resp_wr_ptr++;
1480 }
1481 }
1482
1483 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr,
1484 bnx2i_conn->gen_pdu.resp_buf,
1485 bnx2i_conn->gen_pdu.resp_wr_ptr - bnx2i_conn->gen_pdu.resp_buf);
1486 done:
1487 spin_unlock(&session->back_lock);
1488 return 0;
1489 }
1490
1491
1492 /**
1493 * bnx2i_process_text_resp - this function handles iscsi text response
1494 * @session: iscsi session pointer
1495 * @bnx2i_conn: iscsi connection pointer
1496 * @cqe: pointer to newly DMA'ed CQE entry for processing
1497 *
1498 * process iSCSI Text Response CQE& complete it to open-iscsi user daemon
1499 */
1500 static int bnx2i_process_text_resp(struct iscsi_session *session,
1501 struct bnx2i_conn *bnx2i_conn,
1502 struct cqe *cqe)
1503 {
1504 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1505 struct iscsi_task *task;
1506 struct bnx2i_text_response *text;
1507 struct iscsi_text_rsp *resp_hdr;
1508 int pld_len;
1509 int pad_len;
1510
1511 text = (struct bnx2i_text_response *) cqe;
1512 spin_lock(&session->back_lock);
1513 task = iscsi_itt_to_task(conn, text->itt & ISCSI_LOGIN_RESPONSE_INDEX);
1514 if (!task)
1515 goto done;
1516
1517 resp_hdr = (struct iscsi_text_rsp *)&bnx2i_conn->gen_pdu.resp_hdr;
1518 memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1519 resp_hdr->opcode = text->op_code;
1520 resp_hdr->flags = text->response_flags;
1521 resp_hdr->hlength = 0;
1522
1523 hton24(resp_hdr->dlength, text->data_length);
1524 resp_hdr->itt = task->hdr->itt;
1525 resp_hdr->ttt = cpu_to_be32(text->ttt);
1526 resp_hdr->statsn = task->hdr->exp_statsn;
1527 resp_hdr->exp_cmdsn = cpu_to_be32(text->exp_cmd_sn);
1528 resp_hdr->max_cmdsn = cpu_to_be32(text->max_cmd_sn);
1529 pld_len = text->data_length;
1530 bnx2i_conn->gen_pdu.resp_wr_ptr = bnx2i_conn->gen_pdu.resp_buf +
1531 pld_len;
1532 pad_len = 0;
1533 if (pld_len & 0x3)
1534 pad_len = 4 - (pld_len % 4);
1535
1536 if (pad_len) {
1537 int i = 0;
1538 for (i = 0; i < pad_len; i++) {
1539 bnx2i_conn->gen_pdu.resp_wr_ptr[0] = 0;
1540 bnx2i_conn->gen_pdu.resp_wr_ptr++;
1541 }
1542 }
1543 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr,
1544 bnx2i_conn->gen_pdu.resp_buf,
1545 bnx2i_conn->gen_pdu.resp_wr_ptr -
1546 bnx2i_conn->gen_pdu.resp_buf);
1547 done:
1548 spin_unlock(&session->back_lock);
1549 return 0;
1550 }
1551
1552
1553 /**
1554 * bnx2i_process_tmf_resp - this function handles iscsi TMF response
1555 * @session: iscsi session pointer
1556 * @bnx2i_conn: iscsi connection pointer
1557 * @cqe: pointer to newly DMA'ed CQE entry for processing
1558 *
1559 * process iSCSI TMF Response CQE and wake up the driver eh thread.
1560 */
1561 static int bnx2i_process_tmf_resp(struct iscsi_session *session,
1562 struct bnx2i_conn *bnx2i_conn,
1563 struct cqe *cqe)
1564 {
1565 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1566 struct iscsi_task *task;
1567 struct bnx2i_tmf_response *tmf_cqe;
1568 struct iscsi_tm_rsp *resp_hdr;
1569
1570 tmf_cqe = (struct bnx2i_tmf_response *)cqe;
1571 spin_lock(&session->back_lock);
1572 task = iscsi_itt_to_task(conn,
1573 tmf_cqe->itt & ISCSI_TMF_RESPONSE_INDEX);
1574 if (!task)
1575 goto done;
1576
1577 resp_hdr = (struct iscsi_tm_rsp *) &bnx2i_conn->gen_pdu.resp_hdr;
1578 memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1579 resp_hdr->opcode = tmf_cqe->op_code;
1580 resp_hdr->max_cmdsn = cpu_to_be32(tmf_cqe->max_cmd_sn);
1581 resp_hdr->exp_cmdsn = cpu_to_be32(tmf_cqe->exp_cmd_sn);
1582 resp_hdr->itt = task->hdr->itt;
1583 resp_hdr->response = tmf_cqe->response;
1584
1585 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0);
1586 done:
1587 spin_unlock(&session->back_lock);
1588 return 0;
1589 }
1590
1591 /**
1592 * bnx2i_process_logout_resp - this function handles iscsi logout response
1593 * @session: iscsi session pointer
1594 * @bnx2i_conn: iscsi connection pointer
1595 * @cqe: pointer to newly DMA'ed CQE entry for processing
1596 *
1597 * process iSCSI Logout Response CQE & make function call to
1598 * notify the user daemon.
1599 */
1600 static int bnx2i_process_logout_resp(struct iscsi_session *session,
1601 struct bnx2i_conn *bnx2i_conn,
1602 struct cqe *cqe)
1603 {
1604 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1605 struct iscsi_task *task;
1606 struct bnx2i_logout_response *logout;
1607 struct iscsi_logout_rsp *resp_hdr;
1608
1609 logout = (struct bnx2i_logout_response *) cqe;
1610 spin_lock(&session->back_lock);
1611 task = iscsi_itt_to_task(conn,
1612 logout->itt & ISCSI_LOGOUT_RESPONSE_INDEX);
1613 if (!task)
1614 goto done;
1615
1616 resp_hdr = (struct iscsi_logout_rsp *) &bnx2i_conn->gen_pdu.resp_hdr;
1617 memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1618 resp_hdr->opcode = logout->op_code;
1619 resp_hdr->flags = logout->response;
1620 resp_hdr->hlength = 0;
1621
1622 resp_hdr->itt = task->hdr->itt;
1623 resp_hdr->statsn = task->hdr->exp_statsn;
1624 resp_hdr->exp_cmdsn = cpu_to_be32(logout->exp_cmd_sn);
1625 resp_hdr->max_cmdsn = cpu_to_be32(logout->max_cmd_sn);
1626
1627 resp_hdr->t2wait = cpu_to_be32(logout->time_to_wait);
1628 resp_hdr->t2retain = cpu_to_be32(logout->time_to_retain);
1629
1630 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0);
1631
1632 bnx2i_conn->ep->state = EP_STATE_LOGOUT_RESP_RCVD;
1633 done:
1634 spin_unlock(&session->back_lock);
1635 return 0;
1636 }
1637
1638 /**
1639 * bnx2i_process_nopin_local_cmpl - this function handles iscsi nopin CQE
1640 * @session: iscsi session pointer
1641 * @bnx2i_conn: iscsi connection pointer
1642 * @cqe: pointer to newly DMA'ed CQE entry for processing
1643 *
1644 * process iSCSI NOPIN local completion CQE, frees IIT and command structures
1645 */
1646 static void bnx2i_process_nopin_local_cmpl(struct iscsi_session *session,
1647 struct bnx2i_conn *bnx2i_conn,
1648 struct cqe *cqe)
1649 {
1650 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1651 struct bnx2i_nop_in_msg *nop_in;
1652 struct iscsi_task *task;
1653
1654 nop_in = (struct bnx2i_nop_in_msg *)cqe;
1655 spin_lock(&session->back_lock);
1656 task = iscsi_itt_to_task(conn,
1657 nop_in->itt & ISCSI_NOP_IN_MSG_INDEX);
1658 if (task)
1659 __iscsi_put_task(task);
1660 spin_unlock(&session->back_lock);
1661 }
1662
1663 /**
1664 * bnx2i_unsol_pdu_adjust_rq - makes adjustments to RQ after unsol pdu is recvd
1665 * @conn: iscsi connection
1666 *
1667 * Firmware advances RQ producer index for every unsolicited PDU even if
1668 * payload data length is '0'. This function makes corresponding
1669 * adjustments on the driver side to match this f/w behavior
1670 */
1671 static void bnx2i_unsol_pdu_adjust_rq(struct bnx2i_conn *bnx2i_conn)
1672 {
1673 char dummy_rq_data[2];
1674 bnx2i_get_rq_buf(bnx2i_conn, dummy_rq_data, 1);
1675 bnx2i_put_rq_buf(bnx2i_conn, 1);
1676 }
1677
1678
1679 /**
1680 * bnx2i_process_nopin_mesg - this function handles iscsi nopin CQE
1681 * @session: iscsi session pointer
1682 * @bnx2i_conn: iscsi connection pointer
1683 * @cqe: pointer to newly DMA'ed CQE entry for processing
1684 *
1685 * process iSCSI target's proactive iSCSI NOPIN request
1686 */
1687 static int bnx2i_process_nopin_mesg(struct iscsi_session *session,
1688 struct bnx2i_conn *bnx2i_conn,
1689 struct cqe *cqe)
1690 {
1691 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1692 struct iscsi_task *task;
1693 struct bnx2i_nop_in_msg *nop_in;
1694 struct iscsi_nopin *hdr;
1695 int tgt_async_nop = 0;
1696
1697 nop_in = (struct bnx2i_nop_in_msg *)cqe;
1698
1699 spin_lock(&session->back_lock);
1700 hdr = (struct iscsi_nopin *)&bnx2i_conn->gen_pdu.resp_hdr;
1701 memset(hdr, 0, sizeof(struct iscsi_hdr));
1702 hdr->opcode = nop_in->op_code;
1703 hdr->max_cmdsn = cpu_to_be32(nop_in->max_cmd_sn);
1704 hdr->exp_cmdsn = cpu_to_be32(nop_in->exp_cmd_sn);
1705 hdr->ttt = cpu_to_be32(nop_in->ttt);
1706
1707 if (nop_in->itt == (u16) RESERVED_ITT) {
1708 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
1709 hdr->itt = RESERVED_ITT;
1710 tgt_async_nop = 1;
1711 goto done;
1712 }
1713
1714 /* this is a response to one of our nop-outs */
1715 task = iscsi_itt_to_task(conn,
1716 (itt_t) (nop_in->itt & ISCSI_NOP_IN_MSG_INDEX));
1717 if (task) {
1718 hdr->flags = ISCSI_FLAG_CMD_FINAL;
1719 hdr->itt = task->hdr->itt;
1720 hdr->ttt = cpu_to_be32(nop_in->ttt);
1721 memcpy(&hdr->lun, nop_in->lun, 8);
1722 }
1723 done:
1724 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, NULL, 0);
1725 spin_unlock(&session->back_lock);
1726
1727 return tgt_async_nop;
1728 }
1729
1730
1731 /**
1732 * bnx2i_process_async_mesg - this function handles iscsi async message
1733 * @session: iscsi session pointer
1734 * @bnx2i_conn: iscsi connection pointer
1735 * @cqe: pointer to newly DMA'ed CQE entry for processing
1736 *
1737 * process iSCSI ASYNC Message
1738 */
1739 static void bnx2i_process_async_mesg(struct iscsi_session *session,
1740 struct bnx2i_conn *bnx2i_conn,
1741 struct cqe *cqe)
1742 {
1743 struct bnx2i_async_msg *async_cqe;
1744 struct iscsi_async *resp_hdr;
1745 u8 async_event;
1746
1747 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
1748
1749 async_cqe = (struct bnx2i_async_msg *)cqe;
1750 async_event = async_cqe->async_event;
1751
1752 if (async_event == ISCSI_ASYNC_MSG_SCSI_EVENT) {
1753 iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data,
1754 "async: scsi events not supported\n");
1755 return;
1756 }
1757
1758 spin_lock(&session->back_lock);
1759 resp_hdr = (struct iscsi_async *) &bnx2i_conn->gen_pdu.resp_hdr;
1760 memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1761 resp_hdr->opcode = async_cqe->op_code;
1762 resp_hdr->flags = 0x80;
1763
1764 memcpy(&resp_hdr->lun, async_cqe->lun, 8);
1765 resp_hdr->exp_cmdsn = cpu_to_be32(async_cqe->exp_cmd_sn);
1766 resp_hdr->max_cmdsn = cpu_to_be32(async_cqe->max_cmd_sn);
1767
1768 resp_hdr->async_event = async_cqe->async_event;
1769 resp_hdr->async_vcode = async_cqe->async_vcode;
1770
1771 resp_hdr->param1 = cpu_to_be16(async_cqe->param1);
1772 resp_hdr->param2 = cpu_to_be16(async_cqe->param2);
1773 resp_hdr->param3 = cpu_to_be16(async_cqe->param3);
1774
1775 __iscsi_complete_pdu(bnx2i_conn->cls_conn->dd_data,
1776 (struct iscsi_hdr *)resp_hdr, NULL, 0);
1777 spin_unlock(&session->back_lock);
1778 }
1779
1780
1781 /**
1782 * bnx2i_process_reject_mesg - process iscsi reject pdu
1783 * @session: iscsi session pointer
1784 * @bnx2i_conn: iscsi connection pointer
1785 * @cqe: pointer to newly DMA'ed CQE entry for processing
1786 *
1787 * process iSCSI REJECT message
1788 */
1789 static void bnx2i_process_reject_mesg(struct iscsi_session *session,
1790 struct bnx2i_conn *bnx2i_conn,
1791 struct cqe *cqe)
1792 {
1793 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1794 struct bnx2i_reject_msg *reject;
1795 struct iscsi_reject *hdr;
1796
1797 reject = (struct bnx2i_reject_msg *) cqe;
1798 if (reject->data_length) {
1799 bnx2i_get_rq_buf(bnx2i_conn, conn->data, reject->data_length);
1800 bnx2i_put_rq_buf(bnx2i_conn, 1);
1801 } else
1802 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
1803
1804 spin_lock(&session->back_lock);
1805 hdr = (struct iscsi_reject *) &bnx2i_conn->gen_pdu.resp_hdr;
1806 memset(hdr, 0, sizeof(struct iscsi_hdr));
1807 hdr->opcode = reject->op_code;
1808 hdr->reason = reject->reason;
1809 hton24(hdr->dlength, reject->data_length);
1810 hdr->max_cmdsn = cpu_to_be32(reject->max_cmd_sn);
1811 hdr->exp_cmdsn = cpu_to_be32(reject->exp_cmd_sn);
1812 hdr->ffffffff = cpu_to_be32(RESERVED_ITT);
1813 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, conn->data,
1814 reject->data_length);
1815 spin_unlock(&session->back_lock);
1816 }
1817
1818 /**
1819 * bnx2i_process_cmd_cleanup_resp - process scsi command clean-up completion
1820 * @session: iscsi session pointer
1821 * @bnx2i_conn: iscsi connection pointer
1822 * @cqe: pointer to newly DMA'ed CQE entry for processing
1823 *
1824 * process command cleanup response CQE during conn shutdown or error recovery
1825 */
1826 static void bnx2i_process_cmd_cleanup_resp(struct iscsi_session *session,
1827 struct bnx2i_conn *bnx2i_conn,
1828 struct cqe *cqe)
1829 {
1830 struct bnx2i_cleanup_response *cmd_clean_rsp;
1831 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1832 struct iscsi_task *task;
1833
1834 cmd_clean_rsp = (struct bnx2i_cleanup_response *)cqe;
1835 spin_lock(&session->back_lock);
1836 task = iscsi_itt_to_task(conn,
1837 cmd_clean_rsp->itt & ISCSI_CLEANUP_RESPONSE_INDEX);
1838 if (!task)
1839 printk(KERN_ALERT "bnx2i: cmd clean ITT %x not active\n",
1840 cmd_clean_rsp->itt & ISCSI_CLEANUP_RESPONSE_INDEX);
1841 spin_unlock(&session->back_lock);
1842 complete(&bnx2i_conn->cmd_cleanup_cmpl);
1843 }
1844
1845
1846 /**
1847 * bnx2i_percpu_io_thread - thread per cpu for ios
1848 *
1849 * @arg: ptr to bnx2i_percpu_info structure
1850 */
1851 int bnx2i_percpu_io_thread(void *arg)
1852 {
1853 struct bnx2i_percpu_s *p = arg;
1854 struct bnx2i_work *work, *tmp;
1855 LIST_HEAD(work_list);
1856
1857 set_user_nice(current, MIN_NICE);
1858
1859 while (!kthread_should_stop()) {
1860 spin_lock_bh(&p->p_work_lock);
1861 while (!list_empty(&p->work_list)) {
1862 list_splice_init(&p->work_list, &work_list);
1863 spin_unlock_bh(&p->p_work_lock);
1864
1865 list_for_each_entry_safe(work, tmp, &work_list, list) {
1866 list_del_init(&work->list);
1867 /* work allocated in the bh, freed here */
1868 bnx2i_process_scsi_cmd_resp(work->session,
1869 work->bnx2i_conn,
1870 &work->cqe);
1871 atomic_dec(&work->bnx2i_conn->work_cnt);
1872 kfree(work);
1873 }
1874 spin_lock_bh(&p->p_work_lock);
1875 }
1876 set_current_state(TASK_INTERRUPTIBLE);
1877 spin_unlock_bh(&p->p_work_lock);
1878 schedule();
1879 }
1880 __set_current_state(TASK_RUNNING);
1881
1882 return 0;
1883 }
1884
1885
1886 /**
1887 * bnx2i_queue_scsi_cmd_resp - queue cmd completion to the percpu thread
1888 * @bnx2i_conn: bnx2i connection
1889 *
1890 * this function is called by generic KCQ handler to queue all pending cmd
1891 * completion CQEs
1892 *
1893 * The implementation is to queue the cmd response based on the
1894 * last recorded command for the given connection. The
1895 * cpu_id gets recorded upon task_xmit. No out-of-order completion!
1896 */
1897 static int bnx2i_queue_scsi_cmd_resp(struct iscsi_session *session,
1898 struct bnx2i_conn *bnx2i_conn,
1899 struct bnx2i_nop_in_msg *cqe)
1900 {
1901 struct bnx2i_work *bnx2i_work = NULL;
1902 struct bnx2i_percpu_s *p = NULL;
1903 struct iscsi_task *task;
1904 struct scsi_cmnd *sc;
1905 int rc = 0;
1906
1907 spin_lock(&session->back_lock);
1908 task = iscsi_itt_to_task(bnx2i_conn->cls_conn->dd_data,
1909 cqe->itt & ISCSI_CMD_RESPONSE_INDEX);
1910 if (!task || !task->sc) {
1911 spin_unlock(&session->back_lock);
1912 return -EINVAL;
1913 }
1914 sc = task->sc;
1915
1916 spin_unlock(&session->back_lock);
1917
1918 p = &per_cpu(bnx2i_percpu, blk_mq_rq_cpu(sc->request));
1919 spin_lock(&p->p_work_lock);
1920 if (unlikely(!p->iothread)) {
1921 rc = -EINVAL;
1922 goto err;
1923 }
1924 /* Alloc and copy to the cqe */
1925 bnx2i_work = kzalloc(sizeof(struct bnx2i_work), GFP_ATOMIC);
1926 if (bnx2i_work) {
1927 INIT_LIST_HEAD(&bnx2i_work->list);
1928 bnx2i_work->session = session;
1929 bnx2i_work->bnx2i_conn = bnx2i_conn;
1930 memcpy(&bnx2i_work->cqe, cqe, sizeof(struct cqe));
1931 list_add_tail(&bnx2i_work->list, &p->work_list);
1932 atomic_inc(&bnx2i_conn->work_cnt);
1933 wake_up_process(p->iothread);
1934 spin_unlock(&p->p_work_lock);
1935 goto done;
1936 } else
1937 rc = -ENOMEM;
1938 err:
1939 spin_unlock(&p->p_work_lock);
1940 bnx2i_process_scsi_cmd_resp(session, bnx2i_conn, (struct cqe *)cqe);
1941 done:
1942 return rc;
1943 }
1944
1945
1946 /**
1947 * bnx2i_process_new_cqes - process newly DMA'ed CQE's
1948 * @bnx2i_conn: bnx2i connection
1949 *
1950 * this function is called by generic KCQ handler to process all pending CQE's
1951 */
1952 static int bnx2i_process_new_cqes(struct bnx2i_conn *bnx2i_conn)
1953 {
1954 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1955 struct iscsi_session *session = conn->session;
1956 struct bnx2i_hba *hba = bnx2i_conn->hba;
1957 struct qp_info *qp;
1958 struct bnx2i_nop_in_msg *nopin;
1959 int tgt_async_msg;
1960 int cqe_cnt = 0;
1961
1962 if (bnx2i_conn->ep == NULL)
1963 return 0;
1964
1965 qp = &bnx2i_conn->ep->qp;
1966
1967 if (!qp->cq_virt) {
1968 printk(KERN_ALERT "bnx2i (%s): cq resr freed in bh execution!",
1969 hba->netdev->name);
1970 goto out;
1971 }
1972 while (1) {
1973 nopin = (struct bnx2i_nop_in_msg *) qp->cq_cons_qe;
1974 if (nopin->cq_req_sn != qp->cqe_exp_seq_sn)
1975 break;
1976
1977 if (unlikely(test_bit(ISCSI_SUSPEND_BIT, &conn->suspend_rx))) {
1978 if (nopin->op_code == ISCSI_OP_NOOP_IN &&
1979 nopin->itt == (u16) RESERVED_ITT) {
1980 printk(KERN_ALERT "bnx2i: Unsolicited "
1981 "NOP-In detected for suspended "
1982 "connection dev=%s!\n",
1983 hba->netdev->name);
1984 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
1985 goto cqe_out;
1986 }
1987 break;
1988 }
1989 tgt_async_msg = 0;
1990
1991 switch (nopin->op_code) {
1992 case ISCSI_OP_SCSI_CMD_RSP:
1993 case ISCSI_OP_SCSI_DATA_IN:
1994 /* Run the kthread engine only for data cmds
1995 All other cmds will be completed in this bh! */
1996 bnx2i_queue_scsi_cmd_resp(session, bnx2i_conn, nopin);
1997 goto done;
1998 case ISCSI_OP_LOGIN_RSP:
1999 bnx2i_process_login_resp(session, bnx2i_conn,
2000 qp->cq_cons_qe);
2001 break;
2002 case ISCSI_OP_SCSI_TMFUNC_RSP:
2003 bnx2i_process_tmf_resp(session, bnx2i_conn,
2004 qp->cq_cons_qe);
2005 break;
2006 case ISCSI_OP_TEXT_RSP:
2007 bnx2i_process_text_resp(session, bnx2i_conn,
2008 qp->cq_cons_qe);
2009 break;
2010 case ISCSI_OP_LOGOUT_RSP:
2011 bnx2i_process_logout_resp(session, bnx2i_conn,
2012 qp->cq_cons_qe);
2013 break;
2014 case ISCSI_OP_NOOP_IN:
2015 if (bnx2i_process_nopin_mesg(session, bnx2i_conn,
2016 qp->cq_cons_qe))
2017 tgt_async_msg = 1;
2018 break;
2019 case ISCSI_OPCODE_NOPOUT_LOCAL_COMPLETION:
2020 bnx2i_process_nopin_local_cmpl(session, bnx2i_conn,
2021 qp->cq_cons_qe);
2022 break;
2023 case ISCSI_OP_ASYNC_EVENT:
2024 bnx2i_process_async_mesg(session, bnx2i_conn,
2025 qp->cq_cons_qe);
2026 tgt_async_msg = 1;
2027 break;
2028 case ISCSI_OP_REJECT:
2029 bnx2i_process_reject_mesg(session, bnx2i_conn,
2030 qp->cq_cons_qe);
2031 break;
2032 case ISCSI_OPCODE_CLEANUP_RESPONSE:
2033 bnx2i_process_cmd_cleanup_resp(session, bnx2i_conn,
2034 qp->cq_cons_qe);
2035 break;
2036 default:
2037 printk(KERN_ALERT "bnx2i: unknown opcode 0x%x\n",
2038 nopin->op_code);
2039 }
2040
2041 ADD_STATS_64(hba, rx_pdus, 1);
2042 ADD_STATS_64(hba, rx_bytes, nopin->data_length);
2043 done:
2044 if (!tgt_async_msg) {
2045 if (!atomic_read(&bnx2i_conn->ep->num_active_cmds))
2046 printk(KERN_ALERT "bnx2i (%s): no active cmd! "
2047 "op 0x%x\n",
2048 hba->netdev->name,
2049 nopin->op_code);
2050 else
2051 atomic_dec(&bnx2i_conn->ep->num_active_cmds);
2052 }
2053 cqe_out:
2054 /* clear out in production version only, till beta keep opcode
2055 * field intact, will be helpful in debugging (context dump)
2056 * nopin->op_code = 0;
2057 */
2058 cqe_cnt++;
2059 qp->cqe_exp_seq_sn++;
2060 if (qp->cqe_exp_seq_sn == (qp->cqe_size * 2 + 1))
2061 qp->cqe_exp_seq_sn = ISCSI_INITIAL_SN;
2062
2063 if (qp->cq_cons_qe == qp->cq_last_qe) {
2064 qp->cq_cons_qe = qp->cq_first_qe;
2065 qp->cq_cons_idx = 0;
2066 } else {
2067 qp->cq_cons_qe++;
2068 qp->cq_cons_idx++;
2069 }
2070 }
2071 out:
2072 return cqe_cnt;
2073 }
2074
2075 /**
2076 * bnx2i_fastpath_notification - process global event queue (KCQ)
2077 * @hba: adapter structure pointer
2078 * @new_cqe_kcqe: pointer to newly DMA'ed KCQE entry
2079 *
2080 * Fast path event notification handler, KCQ entry carries context id
2081 * of the connection that has 1 or more pending CQ entries
2082 */
2083 static void bnx2i_fastpath_notification(struct bnx2i_hba *hba,
2084 struct iscsi_kcqe *new_cqe_kcqe)
2085 {
2086 struct bnx2i_conn *bnx2i_conn;
2087 u32 iscsi_cid;
2088 int nxt_idx;
2089
2090 iscsi_cid = new_cqe_kcqe->iscsi_conn_id;
2091 bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
2092
2093 if (!bnx2i_conn) {
2094 printk(KERN_ALERT "cid #%x not valid\n", iscsi_cid);
2095 return;
2096 }
2097 if (!bnx2i_conn->ep) {
2098 printk(KERN_ALERT "cid #%x - ep not bound\n", iscsi_cid);
2099 return;
2100 }
2101
2102 bnx2i_process_new_cqes(bnx2i_conn);
2103 nxt_idx = bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep,
2104 CNIC_ARM_CQE_FP);
2105 if (nxt_idx && nxt_idx == bnx2i_process_new_cqes(bnx2i_conn))
2106 bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep, CNIC_ARM_CQE_FP);
2107 }
2108
2109
2110 /**
2111 * bnx2i_process_update_conn_cmpl - process iscsi conn update completion KCQE
2112 * @hba: adapter structure pointer
2113 * @update_kcqe: kcqe pointer
2114 *
2115 * CONN_UPDATE completion handler, this completes iSCSI connection FFP migration
2116 */
2117 static void bnx2i_process_update_conn_cmpl(struct bnx2i_hba *hba,
2118 struct iscsi_kcqe *update_kcqe)
2119 {
2120 struct bnx2i_conn *conn;
2121 u32 iscsi_cid;
2122
2123 iscsi_cid = update_kcqe->iscsi_conn_id;
2124 conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
2125
2126 if (!conn) {
2127 printk(KERN_ALERT "conn_update: cid %x not valid\n", iscsi_cid);
2128 return;
2129 }
2130 if (!conn->ep) {
2131 printk(KERN_ALERT "cid %x does not have ep bound\n", iscsi_cid);
2132 return;
2133 }
2134
2135 if (update_kcqe->completion_status) {
2136 printk(KERN_ALERT "request failed cid %x\n", iscsi_cid);
2137 conn->ep->state = EP_STATE_ULP_UPDATE_FAILED;
2138 } else
2139 conn->ep->state = EP_STATE_ULP_UPDATE_COMPL;
2140
2141 wake_up_interruptible(&conn->ep->ofld_wait);
2142 }
2143
2144
2145 /**
2146 * bnx2i_recovery_que_add_conn - add connection to recovery queue
2147 * @hba: adapter structure pointer
2148 * @bnx2i_conn: iscsi connection
2149 *
2150 * Add connection to recovery queue and schedule adapter eh worker
2151 */
2152 static void bnx2i_recovery_que_add_conn(struct bnx2i_hba *hba,
2153 struct bnx2i_conn *bnx2i_conn)
2154 {
2155 iscsi_conn_failure(bnx2i_conn->cls_conn->dd_data,
2156 ISCSI_ERR_CONN_FAILED);
2157 }
2158
2159
2160 /**
2161 * bnx2i_process_tcp_error - process error notification on a given connection
2162 *
2163 * @hba: adapter structure pointer
2164 * @tcp_err: tcp error kcqe pointer
2165 *
2166 * handles tcp level error notifications from FW.
2167 */
2168 static void bnx2i_process_tcp_error(struct bnx2i_hba *hba,
2169 struct iscsi_kcqe *tcp_err)
2170 {
2171 struct bnx2i_conn *bnx2i_conn;
2172 u32 iscsi_cid;
2173
2174 iscsi_cid = tcp_err->iscsi_conn_id;
2175 bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
2176
2177 if (!bnx2i_conn) {
2178 printk(KERN_ALERT "bnx2i - cid 0x%x not valid\n", iscsi_cid);
2179 return;
2180 }
2181
2182 printk(KERN_ALERT "bnx2i - cid 0x%x had TCP errors, error code 0x%x\n",
2183 iscsi_cid, tcp_err->completion_status);
2184 bnx2i_recovery_que_add_conn(bnx2i_conn->hba, bnx2i_conn);
2185 }
2186
2187
2188 /**
2189 * bnx2i_process_iscsi_error - process error notification on a given connection
2190 * @hba: adapter structure pointer
2191 * @iscsi_err: iscsi error kcqe pointer
2192 *
2193 * handles iscsi error notifications from the FW. Firmware based in initial
2194 * handshake classifies iscsi protocol / TCP rfc violation into either
2195 * warning or error indications. If indication is of "Error" type, driver
2196 * will initiate session recovery for that connection/session. For
2197 * "Warning" type indication, driver will put out a system log message
2198 * (there will be only one message for each type for the life of the
2199 * session, this is to avoid un-necessarily overloading the system)
2200 */
2201 static void bnx2i_process_iscsi_error(struct bnx2i_hba *hba,
2202 struct iscsi_kcqe *iscsi_err)
2203 {
2204 struct bnx2i_conn *bnx2i_conn;
2205 u32 iscsi_cid;
2206 char warn_notice[] = "iscsi_warning";
2207 char error_notice[] = "iscsi_error";
2208 char additional_notice[64];
2209 char *message;
2210 int need_recovery;
2211 u64 err_mask64;
2212
2213 iscsi_cid = iscsi_err->iscsi_conn_id;
2214 bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
2215 if (!bnx2i_conn) {
2216 printk(KERN_ALERT "bnx2i - cid 0x%x not valid\n", iscsi_cid);
2217 return;
2218 }
2219
2220 err_mask64 = (0x1ULL << iscsi_err->completion_status);
2221
2222 if (err_mask64 & iscsi_error_mask) {
2223 need_recovery = 0;
2224 message = warn_notice;
2225 } else {
2226 need_recovery = 1;
2227 message = error_notice;
2228 }
2229
2230 switch (iscsi_err->completion_status) {
2231 case ISCSI_KCQE_COMPLETION_STATUS_HDR_DIG_ERR:
2232 strcpy(additional_notice, "hdr digest err");
2233 break;
2234 case ISCSI_KCQE_COMPLETION_STATUS_DATA_DIG_ERR:
2235 strcpy(additional_notice, "data digest err");
2236 break;
2237 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_OPCODE:
2238 strcpy(additional_notice, "wrong opcode rcvd");
2239 break;
2240 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_AHS_LEN:
2241 strcpy(additional_notice, "AHS len > 0 rcvd");
2242 break;
2243 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_ITT:
2244 strcpy(additional_notice, "invalid ITT rcvd");
2245 break;
2246 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_STATSN:
2247 strcpy(additional_notice, "wrong StatSN rcvd");
2248 break;
2249 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_EXP_DATASN:
2250 strcpy(additional_notice, "wrong DataSN rcvd");
2251 break;
2252 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T:
2253 strcpy(additional_notice, "pend R2T violation");
2254 break;
2255 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_0:
2256 strcpy(additional_notice, "ERL0, UO");
2257 break;
2258 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_1:
2259 strcpy(additional_notice, "ERL0, U1");
2260 break;
2261 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_2:
2262 strcpy(additional_notice, "ERL0, U2");
2263 break;
2264 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_3:
2265 strcpy(additional_notice, "ERL0, U3");
2266 break;
2267 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_4:
2268 strcpy(additional_notice, "ERL0, U4");
2269 break;
2270 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_5:
2271 strcpy(additional_notice, "ERL0, U5");
2272 break;
2273 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_6:
2274 strcpy(additional_notice, "ERL0, U6");
2275 break;
2276 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REMAIN_RCV_LEN:
2277 strcpy(additional_notice, "invalid resi len");
2278 break;
2279 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_MAX_RCV_PDU_LEN:
2280 strcpy(additional_notice, "MRDSL violation");
2281 break;
2282 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_F_BIT_ZERO:
2283 strcpy(additional_notice, "F-bit not set");
2284 break;
2285 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_NOT_RSRV:
2286 strcpy(additional_notice, "invalid TTT");
2287 break;
2288 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DATASN:
2289 strcpy(additional_notice, "invalid DataSN");
2290 break;
2291 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REMAIN_BURST_LEN:
2292 strcpy(additional_notice, "burst len violation");
2293 break;
2294 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_BUFFER_OFF:
2295 strcpy(additional_notice, "buf offset violation");
2296 break;
2297 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_LUN:
2298 strcpy(additional_notice, "invalid LUN field");
2299 break;
2300 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_R2TSN:
2301 strcpy(additional_notice, "invalid R2TSN field");
2302 break;
2303 #define BNX2I_ERR_DESIRED_DATA_TRNS_LEN_0 \
2304 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_0
2305 case BNX2I_ERR_DESIRED_DATA_TRNS_LEN_0:
2306 strcpy(additional_notice, "invalid cmd len1");
2307 break;
2308 #define BNX2I_ERR_DESIRED_DATA_TRNS_LEN_1 \
2309 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_1
2310 case BNX2I_ERR_DESIRED_DATA_TRNS_LEN_1:
2311 strcpy(additional_notice, "invalid cmd len2");
2312 break;
2313 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T_EXCEED:
2314 strcpy(additional_notice,
2315 "pend r2t exceeds MaxOutstandingR2T value");
2316 break;
2317 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_IS_RSRV:
2318 strcpy(additional_notice, "TTT is rsvd");
2319 break;
2320 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_MAX_BURST_LEN:
2321 strcpy(additional_notice, "MBL violation");
2322 break;
2323 #define BNX2I_ERR_DATA_SEG_LEN_NOT_ZERO \
2324 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DATA_SEG_LEN_NOT_ZERO
2325 case BNX2I_ERR_DATA_SEG_LEN_NOT_ZERO:
2326 strcpy(additional_notice, "data seg len != 0");
2327 break;
2328 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REJECT_PDU_LEN:
2329 strcpy(additional_notice, "reject pdu len error");
2330 break;
2331 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_ASYNC_PDU_LEN:
2332 strcpy(additional_notice, "async pdu len error");
2333 break;
2334 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_NOPIN_PDU_LEN:
2335 strcpy(additional_notice, "nopin pdu len error");
2336 break;
2337 #define BNX2_ERR_PEND_R2T_IN_CLEANUP \
2338 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T_IN_CLEANUP
2339 case BNX2_ERR_PEND_R2T_IN_CLEANUP:
2340 strcpy(additional_notice, "pend r2t in cleanup");
2341 break;
2342
2343 case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_IP_FRAGMENT:
2344 strcpy(additional_notice, "IP fragments rcvd");
2345 break;
2346 case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_IP_OPTIONS:
2347 strcpy(additional_notice, "IP options error");
2348 break;
2349 case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_URGENT_FLAG:
2350 strcpy(additional_notice, "urgent flag error");
2351 break;
2352 default:
2353 printk(KERN_ALERT "iscsi_err - unknown err %x\n",
2354 iscsi_err->completion_status);
2355 }
2356
2357 if (need_recovery) {
2358 iscsi_conn_printk(KERN_ALERT,
2359 bnx2i_conn->cls_conn->dd_data,
2360 "bnx2i: %s - %s\n",
2361 message, additional_notice);
2362
2363 iscsi_conn_printk(KERN_ALERT,
2364 bnx2i_conn->cls_conn->dd_data,
2365 "conn_err - hostno %d conn %p, "
2366 "iscsi_cid %x cid %x\n",
2367 bnx2i_conn->hba->shost->host_no,
2368 bnx2i_conn, bnx2i_conn->ep->ep_iscsi_cid,
2369 bnx2i_conn->ep->ep_cid);
2370 bnx2i_recovery_que_add_conn(bnx2i_conn->hba, bnx2i_conn);
2371 } else
2372 if (!test_and_set_bit(iscsi_err->completion_status,
2373 (void *) &bnx2i_conn->violation_notified))
2374 iscsi_conn_printk(KERN_ALERT,
2375 bnx2i_conn->cls_conn->dd_data,
2376 "bnx2i: %s - %s\n",
2377 message, additional_notice);
2378 }
2379
2380
2381 /**
2382 * bnx2i_process_conn_destroy_cmpl - process iscsi conn destroy completion
2383 * @hba: adapter structure pointer
2384 * @conn_destroy: conn destroy kcqe pointer
2385 *
2386 * handles connection destroy completion request.
2387 */
2388 static void bnx2i_process_conn_destroy_cmpl(struct bnx2i_hba *hba,
2389 struct iscsi_kcqe *conn_destroy)
2390 {
2391 struct bnx2i_endpoint *ep;
2392
2393 ep = bnx2i_find_ep_in_destroy_list(hba, conn_destroy->iscsi_conn_id);
2394 if (!ep) {
2395 printk(KERN_ALERT "bnx2i_conn_destroy_cmpl: no pending "
2396 "offload request, unexpected completion\n");
2397 return;
2398 }
2399
2400 if (hba != ep->hba) {
2401 printk(KERN_ALERT "conn destroy- error hba mis-match\n");
2402 return;
2403 }
2404
2405 if (conn_destroy->completion_status) {
2406 printk(KERN_ALERT "conn_destroy_cmpl: op failed\n");
2407 ep->state = EP_STATE_CLEANUP_FAILED;
2408 } else
2409 ep->state = EP_STATE_CLEANUP_CMPL;
2410 wake_up_interruptible(&ep->ofld_wait);
2411 }
2412
2413
2414 /**
2415 * bnx2i_process_ofld_cmpl - process initial iscsi conn offload completion
2416 * @hba: adapter structure pointer
2417 * @ofld_kcqe: conn offload kcqe pointer
2418 *
2419 * handles initial connection offload completion, ep_connect() thread is
2420 * woken-up to continue with LLP connect process
2421 */
2422 static void bnx2i_process_ofld_cmpl(struct bnx2i_hba *hba,
2423 struct iscsi_kcqe *ofld_kcqe)
2424 {
2425 u32 cid_addr;
2426 struct bnx2i_endpoint *ep;
2427
2428 ep = bnx2i_find_ep_in_ofld_list(hba, ofld_kcqe->iscsi_conn_id);
2429 if (!ep) {
2430 printk(KERN_ALERT "ofld_cmpl: no pend offload request\n");
2431 return;
2432 }
2433
2434 if (hba != ep->hba) {
2435 printk(KERN_ALERT "ofld_cmpl: error hba mis-match\n");
2436 return;
2437 }
2438
2439 if (ofld_kcqe->completion_status) {
2440 ep->state = EP_STATE_OFLD_FAILED;
2441 if (ofld_kcqe->completion_status ==
2442 ISCSI_KCQE_COMPLETION_STATUS_CTX_ALLOC_FAILURE)
2443 printk(KERN_ALERT "bnx2i (%s): ofld1 cmpl - unable "
2444 "to allocate iSCSI context resources\n",
2445 hba->netdev->name);
2446 else if (ofld_kcqe->completion_status ==
2447 ISCSI_KCQE_COMPLETION_STATUS_INVALID_OPCODE)
2448 printk(KERN_ALERT "bnx2i (%s): ofld1 cmpl - invalid "
2449 "opcode\n", hba->netdev->name);
2450 else if (ofld_kcqe->completion_status ==
2451 ISCSI_KCQE_COMPLETION_STATUS_CID_BUSY)
2452 /* error status code valid only for 5771x chipset */
2453 ep->state = EP_STATE_OFLD_FAILED_CID_BUSY;
2454 else
2455 printk(KERN_ALERT "bnx2i (%s): ofld1 cmpl - invalid "
2456 "error code %d\n", hba->netdev->name,
2457 ofld_kcqe->completion_status);
2458 } else {
2459 ep->state = EP_STATE_OFLD_COMPL;
2460 cid_addr = ofld_kcqe->iscsi_conn_context_id;
2461 ep->ep_cid = cid_addr;
2462 ep->qp.ctx_base = NULL;
2463 }
2464 wake_up_interruptible(&ep->ofld_wait);
2465 }
2466
2467 /**
2468 * bnx2i_indicate_kcqe - process iscsi conn update completion KCQE
2469 * @hba: adapter structure pointer
2470 * @update_kcqe: kcqe pointer
2471 *
2472 * Generic KCQ event handler/dispatcher
2473 */
2474 static void bnx2i_indicate_kcqe(void *context, struct kcqe *kcqe[],
2475 u32 num_cqe)
2476 {
2477 struct bnx2i_hba *hba = context;
2478 int i = 0;
2479 struct iscsi_kcqe *ikcqe = NULL;
2480
2481 while (i < num_cqe) {
2482 ikcqe = (struct iscsi_kcqe *) kcqe[i++];
2483
2484 if (ikcqe->op_code ==
2485 ISCSI_KCQE_OPCODE_CQ_EVENT_NOTIFICATION)
2486 bnx2i_fastpath_notification(hba, ikcqe);
2487 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_OFFLOAD_CONN)
2488 bnx2i_process_ofld_cmpl(hba, ikcqe);
2489 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_UPDATE_CONN)
2490 bnx2i_process_update_conn_cmpl(hba, ikcqe);
2491 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_INIT) {
2492 if (ikcqe->completion_status !=
2493 ISCSI_KCQE_COMPLETION_STATUS_SUCCESS)
2494 bnx2i_iscsi_license_error(hba, ikcqe->\
2495 completion_status);
2496 else {
2497 set_bit(ADAPTER_STATE_UP, &hba->adapter_state);
2498 bnx2i_get_link_state(hba);
2499 printk(KERN_INFO "bnx2i [%.2x:%.2x.%.2x]: "
2500 "ISCSI_INIT passed\n",
2501 (u8)hba->pcidev->bus->number,
2502 hba->pci_devno,
2503 (u8)hba->pci_func);
2504
2505
2506 }
2507 } else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_DESTROY_CONN)
2508 bnx2i_process_conn_destroy_cmpl(hba, ikcqe);
2509 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_ISCSI_ERROR)
2510 bnx2i_process_iscsi_error(hba, ikcqe);
2511 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_TCP_ERROR)
2512 bnx2i_process_tcp_error(hba, ikcqe);
2513 else
2514 printk(KERN_ALERT "bnx2i: unknown opcode 0x%x\n",
2515 ikcqe->op_code);
2516 }
2517 }
2518
2519
2520 /**
2521 * bnx2i_indicate_netevent - Generic netdev event handler
2522 * @context: adapter structure pointer
2523 * @event: event type
2524 * @vlan_id: vlans id - associated vlan id with this event
2525 *
2526 * Handles four netdev events, NETDEV_UP, NETDEV_DOWN,
2527 * NETDEV_GOING_DOWN and NETDEV_CHANGE
2528 */
2529 static void bnx2i_indicate_netevent(void *context, unsigned long event,
2530 u16 vlan_id)
2531 {
2532 struct bnx2i_hba *hba = context;
2533
2534 /* Ignore all netevent coming from vlans */
2535 if (vlan_id != 0)
2536 return;
2537
2538 switch (event) {
2539 case NETDEV_UP:
2540 if (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state))
2541 bnx2i_send_fw_iscsi_init_msg(hba);
2542 break;
2543 case NETDEV_DOWN:
2544 clear_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state);
2545 clear_bit(ADAPTER_STATE_UP, &hba->adapter_state);
2546 break;
2547 case NETDEV_GOING_DOWN:
2548 set_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state);
2549 iscsi_host_for_each_session(hba->shost,
2550 bnx2i_drop_session);
2551 break;
2552 case NETDEV_CHANGE:
2553 bnx2i_get_link_state(hba);
2554 break;
2555 default:
2556 ;
2557 }
2558 }
2559
2560
2561 /**
2562 * bnx2i_cm_connect_cmpl - process iscsi conn establishment completion
2563 * @cm_sk: cnic sock structure pointer
2564 *
2565 * function callback exported via bnx2i - cnic driver interface to
2566 * indicate completion of option-2 TCP connect request.
2567 */
2568 static void bnx2i_cm_connect_cmpl(struct cnic_sock *cm_sk)
2569 {
2570 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2571
2572 if (test_bit(ADAPTER_STATE_GOING_DOWN, &ep->hba->adapter_state))
2573 ep->state = EP_STATE_CONNECT_FAILED;
2574 else if (test_bit(SK_F_OFFLD_COMPLETE, &cm_sk->flags))
2575 ep->state = EP_STATE_CONNECT_COMPL;
2576 else
2577 ep->state = EP_STATE_CONNECT_FAILED;
2578
2579 wake_up_interruptible(&ep->ofld_wait);
2580 }
2581
2582
2583 /**
2584 * bnx2i_cm_close_cmpl - process tcp conn close completion
2585 * @cm_sk: cnic sock structure pointer
2586 *
2587 * function callback exported via bnx2i - cnic driver interface to
2588 * indicate completion of option-2 graceful TCP connect shutdown
2589 */
2590 static void bnx2i_cm_close_cmpl(struct cnic_sock *cm_sk)
2591 {
2592 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2593
2594 ep->state = EP_STATE_DISCONN_COMPL;
2595 wake_up_interruptible(&ep->ofld_wait);
2596 }
2597
2598
2599 /**
2600 * bnx2i_cm_abort_cmpl - process abortive tcp conn teardown completion
2601 * @cm_sk: cnic sock structure pointer
2602 *
2603 * function callback exported via bnx2i - cnic driver interface to
2604 * indicate completion of option-2 abortive TCP connect termination
2605 */
2606 static void bnx2i_cm_abort_cmpl(struct cnic_sock *cm_sk)
2607 {
2608 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2609
2610 ep->state = EP_STATE_DISCONN_COMPL;
2611 wake_up_interruptible(&ep->ofld_wait);
2612 }
2613
2614
2615 /**
2616 * bnx2i_cm_remote_close - process received TCP FIN
2617 * @hba: adapter structure pointer
2618 * @update_kcqe: kcqe pointer
2619 *
2620 * function callback exported via bnx2i - cnic driver interface to indicate
2621 * async TCP events such as FIN
2622 */
2623 static void bnx2i_cm_remote_close(struct cnic_sock *cm_sk)
2624 {
2625 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2626
2627 ep->state = EP_STATE_TCP_FIN_RCVD;
2628 if (ep->conn)
2629 bnx2i_recovery_que_add_conn(ep->hba, ep->conn);
2630 }
2631
2632 /**
2633 * bnx2i_cm_remote_abort - process TCP RST and start conn cleanup
2634 * @hba: adapter structure pointer
2635 * @update_kcqe: kcqe pointer
2636 *
2637 * function callback exported via bnx2i - cnic driver interface to
2638 * indicate async TCP events (RST) sent by the peer.
2639 */
2640 static void bnx2i_cm_remote_abort(struct cnic_sock *cm_sk)
2641 {
2642 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2643 u32 old_state = ep->state;
2644
2645 ep->state = EP_STATE_TCP_RST_RCVD;
2646 if (old_state == EP_STATE_DISCONN_START)
2647 wake_up_interruptible(&ep->ofld_wait);
2648 else
2649 if (ep->conn)
2650 bnx2i_recovery_que_add_conn(ep->hba, ep->conn);
2651 }
2652
2653
2654 static int bnx2i_send_nl_mesg(void *context, u32 msg_type,
2655 char *buf, u16 buflen)
2656 {
2657 struct bnx2i_hba *hba = context;
2658 int rc;
2659
2660 if (!hba)
2661 return -ENODEV;
2662
2663 rc = iscsi_offload_mesg(hba->shost, &bnx2i_iscsi_transport,
2664 msg_type, buf, buflen);
2665 if (rc)
2666 printk(KERN_ALERT "bnx2i: private nl message send error\n");
2667
2668 return rc;
2669 }
2670
2671
2672 /**
2673 * bnx2i_cnic_cb - global template of bnx2i - cnic driver interface structure
2674 * carrying callback function pointers
2675 *
2676 */
2677 struct cnic_ulp_ops bnx2i_cnic_cb = {
2678 .cnic_init = bnx2i_ulp_init,
2679 .cnic_exit = bnx2i_ulp_exit,
2680 .cnic_start = bnx2i_start,
2681 .cnic_stop = bnx2i_stop,
2682 .indicate_kcqes = bnx2i_indicate_kcqe,
2683 .indicate_netevent = bnx2i_indicate_netevent,
2684 .cm_connect_complete = bnx2i_cm_connect_cmpl,
2685 .cm_close_complete = bnx2i_cm_close_cmpl,
2686 .cm_abort_complete = bnx2i_cm_abort_cmpl,
2687 .cm_remote_close = bnx2i_cm_remote_close,
2688 .cm_remote_abort = bnx2i_cm_remote_abort,
2689 .iscsi_nl_send_msg = bnx2i_send_nl_mesg,
2690 .cnic_get_stats = bnx2i_get_stats,
2691 .owner = THIS_MODULE
2692 };
2693
2694
2695 /**
2696 * bnx2i_map_ep_dbell_regs - map connection doorbell registers
2697 * @ep: bnx2i endpoint
2698 *
2699 * maps connection's SQ and RQ doorbell registers, 5706/5708/5709 hosts these
2700 * register in BAR #0. Whereas in 57710 these register are accessed by
2701 * mapping BAR #1
2702 */
2703 int bnx2i_map_ep_dbell_regs(struct bnx2i_endpoint *ep)
2704 {
2705 u32 cid_num;
2706 u32 reg_off;
2707 u32 first_l4l5;
2708 u32 ctx_sz;
2709 u32 config2;
2710 resource_size_t reg_base;
2711
2712 cid_num = bnx2i_get_cid_num(ep);
2713
2714 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
2715 reg_base = pci_resource_start(ep->hba->pcidev,
2716 BNX2X_DOORBELL_PCI_BAR);
2717 reg_off = (1 << BNX2X_DB_SHIFT) * (cid_num & 0x1FFFF);
2718 ep->qp.ctx_base = ioremap(reg_base + reg_off, 4);
2719 if (!ep->qp.ctx_base)
2720 return -ENOMEM;
2721 goto arm_cq;
2722 }
2723
2724 if ((test_bit(BNX2I_NX2_DEV_5709, &ep->hba->cnic_dev_type)) &&
2725 (ep->hba->mail_queue_access == BNX2I_MQ_BIN_MODE)) {
2726 config2 = REG_RD(ep->hba, BNX2_MQ_CONFIG2);
2727 first_l4l5 = config2 & BNX2_MQ_CONFIG2_FIRST_L4L5;
2728 ctx_sz = (config2 & BNX2_MQ_CONFIG2_CONT_SZ) >> 3;
2729 if (ctx_sz)
2730 reg_off = CTX_OFFSET + MAX_CID_CNT * MB_KERNEL_CTX_SIZE
2731 + BNX2I_570X_PAGE_SIZE_DEFAULT *
2732 (((cid_num - first_l4l5) / ctx_sz) + 256);
2733 else
2734 reg_off = CTX_OFFSET + (MB_KERNEL_CTX_SIZE * cid_num);
2735 } else
2736 /* 5709 device in normal node and 5706/5708 devices */
2737 reg_off = CTX_OFFSET + (MB_KERNEL_CTX_SIZE * cid_num);
2738
2739 ep->qp.ctx_base = ioremap(ep->hba->reg_base + reg_off,
2740 MB_KERNEL_CTX_SIZE);
2741 if (!ep->qp.ctx_base)
2742 return -ENOMEM;
2743
2744 arm_cq:
2745 bnx2i_arm_cq_event_coalescing(ep, CNIC_ARM_CQE);
2746 return 0;
2747 }
Linux with added FPC-III support