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tty/serial: atmel_serial: whitespace and braces modifications
[zen-stable.git] / drivers / scsi / bnx2i / bnx2i_hwi.c
blob9ae80cd5953bce99f24d9f7b85dd77d332b25a6f
1 /* bnx2i_hwi.c: Broadcom NetXtreme II iSCSI driver.
2 *
3 * Copyright (c) 2006 - 2011 Broadcom Corporation
4 * Copyright (c) 2007, 2008 Red Hat, Inc. All rights reserved.
5 * Copyright (c) 2007, 2008 Mike Christie
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation.
10 *
11 * Written by: Anil Veerabhadrappa (anilgv@broadcom.com)
12 * Maintained by: Eddie Wai (eddie.wai@broadcom.com)
13 */
14
15 #include <linux/gfp.h>
16 #include <scsi/scsi_tcq.h>
17 #include <scsi/libiscsi.h>
18 #include "bnx2i.h"
19
20 DECLARE_PER_CPU(struct bnx2i_percpu_s, bnx2i_percpu);
21
22 /**
23 * bnx2i_get_cid_num - get cid from ep
24 * @ep: endpoint pointer
25 *
26 * Only applicable to 57710 family of devices
27 */
28 static u32 bnx2i_get_cid_num(struct bnx2i_endpoint *ep)
29 {
30 u32 cid;
31
32 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
33 cid = ep->ep_cid;
34 else
35 cid = GET_CID_NUM(ep->ep_cid);
36 return cid;
37 }
38
39
40 /**
41 * bnx2i_adjust_qp_size - Adjust SQ/RQ/CQ size for 57710 device type
42 * @hba: Adapter for which adjustments is to be made
43 *
44 * Only applicable to 57710 family of devices
45 */
46 static void bnx2i_adjust_qp_size(struct bnx2i_hba *hba)
47 {
48 u32 num_elements_per_pg;
49
50 if (test_bit(BNX2I_NX2_DEV_5706, &hba->cnic_dev_type) ||
51 test_bit(BNX2I_NX2_DEV_5708, &hba->cnic_dev_type) ||
52 test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type)) {
53 if (!is_power_of_2(hba->max_sqes))
54 hba->max_sqes = rounddown_pow_of_two(hba->max_sqes);
55
56 if (!is_power_of_2(hba->max_rqes))
57 hba->max_rqes = rounddown_pow_of_two(hba->max_rqes);
58 }
59
60 /* Adjust each queue size if the user selection does not
61 * yield integral num of page buffers
62 */
63 /* adjust SQ */
64 num_elements_per_pg = PAGE_SIZE / BNX2I_SQ_WQE_SIZE;
65 if (hba->max_sqes < num_elements_per_pg)
66 hba->max_sqes = num_elements_per_pg;
67 else if (hba->max_sqes % num_elements_per_pg)
68 hba->max_sqes = (hba->max_sqes + num_elements_per_pg - 1) &
69 ~(num_elements_per_pg - 1);
70
71 /* adjust CQ */
72 num_elements_per_pg = PAGE_SIZE / BNX2I_CQE_SIZE;
73 if (hba->max_cqes < num_elements_per_pg)
74 hba->max_cqes = num_elements_per_pg;
75 else if (hba->max_cqes % num_elements_per_pg)
76 hba->max_cqes = (hba->max_cqes + num_elements_per_pg - 1) &
77 ~(num_elements_per_pg - 1);
78
79 /* adjust RQ */
80 num_elements_per_pg = PAGE_SIZE / BNX2I_RQ_WQE_SIZE;
81 if (hba->max_rqes < num_elements_per_pg)
82 hba->max_rqes = num_elements_per_pg;
83 else if (hba->max_rqes % num_elements_per_pg)
84 hba->max_rqes = (hba->max_rqes + num_elements_per_pg - 1) &
85 ~(num_elements_per_pg - 1);
86 }
87
88
89 /**
90 * bnx2i_get_link_state - get network interface link state
91 * @hba: adapter instance pointer
92 *
93 * updates adapter structure flag based on netdev state
94 */
95 static void bnx2i_get_link_state(struct bnx2i_hba *hba)
96 {
97 if (test_bit(__LINK_STATE_NOCARRIER, &hba->netdev->state))
98 set_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state);
99 else
100 clear_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state);
101 }
102
103
104 /**
105 * bnx2i_iscsi_license_error - displays iscsi license related error message
106 * @hba: adapter instance pointer
107 * @error_code: error classification
108 *
109 * Puts out an error log when driver is unable to offload iscsi connection
110 * due to license restrictions
111 */
112 static void bnx2i_iscsi_license_error(struct bnx2i_hba *hba, u32 error_code)
113 {
114 if (error_code == ISCSI_KCQE_COMPLETION_STATUS_ISCSI_NOT_SUPPORTED)
115 /* iSCSI offload not supported on this device */
116 printk(KERN_ERR "bnx2i: iSCSI not supported, dev=%s\n",
117 hba->netdev->name);
118 if (error_code == ISCSI_KCQE_COMPLETION_STATUS_LOM_ISCSI_NOT_ENABLED)
119 /* iSCSI offload not supported on this LOM device */
120 printk(KERN_ERR "bnx2i: LOM is not enable to "
121 "offload iSCSI connections, dev=%s\n",
122 hba->netdev->name);
123 set_bit(ADAPTER_STATE_INIT_FAILED, &hba->adapter_state);
124 }
125
126
127 /**
128 * bnx2i_arm_cq_event_coalescing - arms CQ to enable EQ notification
129 * @ep: endpoint (transport indentifier) structure
130 * @action: action, ARM or DISARM. For now only ARM_CQE is used
131 *
132 * Arm'ing CQ will enable chip to generate global EQ events inorder to interrupt
133 * the driver. EQ event is generated CQ index is hit or at least 1 CQ is
134 * outstanding and on chip timer expires
135 */
136 int bnx2i_arm_cq_event_coalescing(struct bnx2i_endpoint *ep, u8 action)
137 {
138 struct bnx2i_5771x_cq_db *cq_db;
139 u16 cq_index;
140 u16 next_index = 0;
141 u32 num_active_cmds;
142
143 /* Coalesce CQ entries only on 10G devices */
144 if (!test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
145 return 0;
146
147 /* Do not update CQ DB multiple times before firmware writes
148 * '0xFFFF' to CQDB->SQN field. Deviation may cause spurious
149 * interrupts and other unwanted results
150 */
151 cq_db = (struct bnx2i_5771x_cq_db *) ep->qp.cq_pgtbl_virt;
152
153 if (action != CNIC_ARM_CQE_FP)
154 if (cq_db->sqn[0] && cq_db->sqn[0] != 0xFFFF)
155 return 0;
156
157 if (action == CNIC_ARM_CQE || action == CNIC_ARM_CQE_FP) {
158 num_active_cmds = atomic_read(&ep->num_active_cmds);
159 if (num_active_cmds <= event_coal_min)
160 next_index = 1;
161 else {
162 next_index = num_active_cmds >> ep->ec_shift;
163 if (next_index > num_active_cmds - event_coal_min)
164 next_index = num_active_cmds - event_coal_min;
165 }
166 if (!next_index)
167 next_index = 1;
168 cq_index = ep->qp.cqe_exp_seq_sn + next_index - 1;
169 if (cq_index > ep->qp.cqe_size * 2)
170 cq_index -= ep->qp.cqe_size * 2;
171 if (!cq_index)
172 cq_index = 1;
173
174 cq_db->sqn[0] = cq_index;
175 }
176 return next_index;
177 }
178
179
180 /**
181 * bnx2i_get_rq_buf - copy RQ buffer contents to driver buffer
182 * @conn: iscsi connection on which RQ event occurred
183 * @ptr: driver buffer to which RQ buffer contents is to
184 * be copied
185 * @len: length of valid data inside RQ buf
186 *
187 * Copies RQ buffer contents from shared (DMA'able) memory region to
188 * driver buffer. RQ is used to DMA unsolicitated iscsi pdu's and
189 * scsi sense info
190 */
191 void bnx2i_get_rq_buf(struct bnx2i_conn *bnx2i_conn, char *ptr, int len)
192 {
193 if (!bnx2i_conn->ep->qp.rqe_left)
194 return;
195
196 bnx2i_conn->ep->qp.rqe_left--;
197 memcpy(ptr, (u8 *) bnx2i_conn->ep->qp.rq_cons_qe, len);
198 if (bnx2i_conn->ep->qp.rq_cons_qe == bnx2i_conn->ep->qp.rq_last_qe) {
199 bnx2i_conn->ep->qp.rq_cons_qe = bnx2i_conn->ep->qp.rq_first_qe;
200 bnx2i_conn->ep->qp.rq_cons_idx = 0;
201 } else {
202 bnx2i_conn->ep->qp.rq_cons_qe++;
203 bnx2i_conn->ep->qp.rq_cons_idx++;
204 }
205 }
206
207
208 static void bnx2i_ring_577xx_doorbell(struct bnx2i_conn *conn)
209 {
210 struct bnx2i_5771x_dbell dbell;
211 u32 msg;
212
213 memset(&dbell, 0, sizeof(dbell));
214 dbell.dbell.header = (B577XX_ISCSI_CONNECTION_TYPE <<
215 B577XX_DOORBELL_HDR_CONN_TYPE_SHIFT);
216 msg = *((u32 *)&dbell);
217 /* TODO : get doorbell register mapping */
218 writel(cpu_to_le32(msg), conn->ep->qp.ctx_base);
219 }
220
221
222 /**
223 * bnx2i_put_rq_buf - Replenish RQ buffer, if required ring on chip doorbell
224 * @conn: iscsi connection on which event to post
225 * @count: number of RQ buffer being posted to chip
226 *
227 * No need to ring hardware doorbell for 57710 family of devices
228 */
229 void bnx2i_put_rq_buf(struct bnx2i_conn *bnx2i_conn, int count)
230 {
231 struct bnx2i_5771x_sq_rq_db *rq_db;
232 u16 hi_bit = (bnx2i_conn->ep->qp.rq_prod_idx & 0x8000);
233 struct bnx2i_endpoint *ep = bnx2i_conn->ep;
234
235 ep->qp.rqe_left += count;
236 ep->qp.rq_prod_idx &= 0x7FFF;
237 ep->qp.rq_prod_idx += count;
238
239 if (ep->qp.rq_prod_idx > bnx2i_conn->hba->max_rqes) {
240 ep->qp.rq_prod_idx %= bnx2i_conn->hba->max_rqes;
241 if (!hi_bit)
242 ep->qp.rq_prod_idx |= 0x8000;
243 } else
244 ep->qp.rq_prod_idx |= hi_bit;
245
246 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
247 rq_db = (struct bnx2i_5771x_sq_rq_db *) ep->qp.rq_pgtbl_virt;
248 rq_db->prod_idx = ep->qp.rq_prod_idx;
249 /* no need to ring hardware doorbell for 57710 */
250 } else {
251 writew(ep->qp.rq_prod_idx,
252 ep->qp.ctx_base + CNIC_RECV_DOORBELL);
253 }
254 mmiowb();
255 }
256
257
258 /**
259 * bnx2i_ring_sq_dbell - Ring SQ doorbell to wake-up the processing engine
260 * @conn: iscsi connection to which new SQ entries belong
261 * @count: number of SQ WQEs to post
262 *
263 * SQ DB is updated in host memory and TX Doorbell is rung for 57710 family
264 * of devices. For 5706/5708/5709 new SQ WQE count is written into the
265 * doorbell register
266 */
267 static void bnx2i_ring_sq_dbell(struct bnx2i_conn *bnx2i_conn, int count)
268 {
269 struct bnx2i_5771x_sq_rq_db *sq_db;
270 struct bnx2i_endpoint *ep = bnx2i_conn->ep;
271
272 atomic_inc(&ep->num_active_cmds);
273 wmb(); /* flush SQ WQE memory before the doorbell is rung */
274 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
275 sq_db = (struct bnx2i_5771x_sq_rq_db *) ep->qp.sq_pgtbl_virt;
276 sq_db->prod_idx = ep->qp.sq_prod_idx;
277 bnx2i_ring_577xx_doorbell(bnx2i_conn);
278 } else
279 writew(count, ep->qp.ctx_base + CNIC_SEND_DOORBELL);
280
281 mmiowb(); /* flush posted PCI writes */
282 }
283
284
285 /**
286 * bnx2i_ring_dbell_update_sq_params - update SQ driver parameters
287 * @conn: iscsi connection to which new SQ entries belong
288 * @count: number of SQ WQEs to post
289 *
290 * this routine will update SQ driver parameters and ring the doorbell
291 */
292 static void bnx2i_ring_dbell_update_sq_params(struct bnx2i_conn *bnx2i_conn,
293 int count)
294 {
295 int tmp_cnt;
296
297 if (count == 1) {
298 if (bnx2i_conn->ep->qp.sq_prod_qe ==
299 bnx2i_conn->ep->qp.sq_last_qe)
300 bnx2i_conn->ep->qp.sq_prod_qe =
301 bnx2i_conn->ep->qp.sq_first_qe;
302 else
303 bnx2i_conn->ep->qp.sq_prod_qe++;
304 } else {
305 if ((bnx2i_conn->ep->qp.sq_prod_qe + count) <=
306 bnx2i_conn->ep->qp.sq_last_qe)
307 bnx2i_conn->ep->qp.sq_prod_qe += count;
308 else {
309 tmp_cnt = bnx2i_conn->ep->qp.sq_last_qe -
310 bnx2i_conn->ep->qp.sq_prod_qe;
311 bnx2i_conn->ep->qp.sq_prod_qe =
312 &bnx2i_conn->ep->qp.sq_first_qe[count -
313 (tmp_cnt + 1)];
314 }
315 }
316 bnx2i_conn->ep->qp.sq_prod_idx += count;
317 /* Ring the doorbell */
318 bnx2i_ring_sq_dbell(bnx2i_conn, bnx2i_conn->ep->qp.sq_prod_idx);
319 }
320
321
322 /**
323 * bnx2i_send_iscsi_login - post iSCSI login request MP WQE to hardware
324 * @conn: iscsi connection
325 * @cmd: driver command structure which is requesting
326 * a WQE to sent to chip for further processing
327 *
328 * prepare and post an iSCSI Login request WQE to CNIC firmware
329 */
330 int bnx2i_send_iscsi_login(struct bnx2i_conn *bnx2i_conn,
331 struct iscsi_task *task)
332 {
333 struct bnx2i_cmd *bnx2i_cmd;
334 struct bnx2i_login_request *login_wqe;
335 struct iscsi_login_req *login_hdr;
336 u32 dword;
337
338 bnx2i_cmd = (struct bnx2i_cmd *)task->dd_data;
339 login_hdr = (struct iscsi_login_req *)task->hdr;
340 login_wqe = (struct bnx2i_login_request *)
341 bnx2i_conn->ep->qp.sq_prod_qe;
342
343 login_wqe->op_code = login_hdr->opcode;
344 login_wqe->op_attr = login_hdr->flags;
345 login_wqe->version_max = login_hdr->max_version;
346 login_wqe->version_min = login_hdr->min_version;
347 login_wqe->data_length = ntoh24(login_hdr->dlength);
348 login_wqe->isid_lo = *((u32 *) login_hdr->isid);
349 login_wqe->isid_hi = *((u16 *) login_hdr->isid + 2);
350 login_wqe->tsih = login_hdr->tsih;
351 login_wqe->itt = task->itt |
352 (ISCSI_TASK_TYPE_MPATH << ISCSI_LOGIN_REQUEST_TYPE_SHIFT);
353 login_wqe->cid = login_hdr->cid;
354
355 login_wqe->cmd_sn = be32_to_cpu(login_hdr->cmdsn);
356 login_wqe->exp_stat_sn = be32_to_cpu(login_hdr->exp_statsn);
357 login_wqe->flags = ISCSI_LOGIN_REQUEST_UPDATE_EXP_STAT_SN;
358
359 login_wqe->resp_bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_bd_dma;
360 login_wqe->resp_bd_list_addr_hi =
361 (u32) ((u64) bnx2i_conn->gen_pdu.resp_bd_dma >> 32);
362
363 dword = ((1 << ISCSI_LOGIN_REQUEST_NUM_RESP_BDS_SHIFT) |
364 (bnx2i_conn->gen_pdu.resp_buf_size <<
365 ISCSI_LOGIN_REQUEST_RESP_BUFFER_LENGTH_SHIFT));
366 login_wqe->resp_buffer = dword;
367 login_wqe->bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.req_bd_dma;
368 login_wqe->bd_list_addr_hi =
369 (u32) ((u64) bnx2i_conn->gen_pdu.req_bd_dma >> 32);
370 login_wqe->num_bds = 1;
371 login_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
372
373 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
374 return 0;
375 }
376
377 /**
378 * bnx2i_send_iscsi_tmf - post iSCSI task management request MP WQE to hardware
379 * @conn: iscsi connection
380 * @mtask: driver command structure which is requesting
381 * a WQE to sent to chip for further processing
382 *
383 * prepare and post an iSCSI Login request WQE to CNIC firmware
384 */
385 int bnx2i_send_iscsi_tmf(struct bnx2i_conn *bnx2i_conn,
386 struct iscsi_task *mtask)
387 {
388 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
389 struct iscsi_tm *tmfabort_hdr;
390 struct scsi_cmnd *ref_sc;
391 struct iscsi_task *ctask;
392 struct bnx2i_cmd *bnx2i_cmd;
393 struct bnx2i_tmf_request *tmfabort_wqe;
394 u32 dword;
395 u32 scsi_lun[2];
396
397 bnx2i_cmd = (struct bnx2i_cmd *)mtask->dd_data;
398 tmfabort_hdr = (struct iscsi_tm *)mtask->hdr;
399 tmfabort_wqe = (struct bnx2i_tmf_request *)
400 bnx2i_conn->ep->qp.sq_prod_qe;
401
402 tmfabort_wqe->op_code = tmfabort_hdr->opcode;
403 tmfabort_wqe->op_attr = tmfabort_hdr->flags;
404
405 tmfabort_wqe->itt = (mtask->itt | (ISCSI_TASK_TYPE_MPATH << 14));
406 tmfabort_wqe->reserved2 = 0;
407 tmfabort_wqe->cmd_sn = be32_to_cpu(tmfabort_hdr->cmdsn);
408
409 switch (tmfabort_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) {
410 case ISCSI_TM_FUNC_ABORT_TASK:
411 case ISCSI_TM_FUNC_TASK_REASSIGN:
412 ctask = iscsi_itt_to_task(conn, tmfabort_hdr->rtt);
413 if (!ctask || !ctask->sc)
414 /*
415 * the iscsi layer must have completed the cmd while
416 * was starting up.
417 *
418 * Note: In the case of a SCSI cmd timeout, the task's
419 * sc is still active; hence ctask->sc != 0
420 * In this case, the task must be aborted
421 */
422 return 0;
423
424 ref_sc = ctask->sc;
425 if (ref_sc->sc_data_direction == DMA_TO_DEVICE)
426 dword = (ISCSI_TASK_TYPE_WRITE <<
427 ISCSI_CMD_REQUEST_TYPE_SHIFT);
428 else
429 dword = (ISCSI_TASK_TYPE_READ <<
430 ISCSI_CMD_REQUEST_TYPE_SHIFT);
431 tmfabort_wqe->ref_itt = (dword |
432 (tmfabort_hdr->rtt & ISCSI_ITT_MASK));
433 break;
434 default:
435 tmfabort_wqe->ref_itt = RESERVED_ITT;
436 }
437 memcpy(scsi_lun, &tmfabort_hdr->lun, sizeof(struct scsi_lun));
438 tmfabort_wqe->lun[0] = be32_to_cpu(scsi_lun[0]);
439 tmfabort_wqe->lun[1] = be32_to_cpu(scsi_lun[1]);
440
441 tmfabort_wqe->ref_cmd_sn = be32_to_cpu(tmfabort_hdr->refcmdsn);
442
443 tmfabort_wqe->bd_list_addr_lo = (u32) bnx2i_conn->hba->mp_bd_dma;
444 tmfabort_wqe->bd_list_addr_hi = (u32)
445 ((u64) bnx2i_conn->hba->mp_bd_dma >> 32);
446 tmfabort_wqe->num_bds = 1;
447 tmfabort_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
448
449 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
450 return 0;
451 }
452
453 /**
454 * bnx2i_send_iscsi_text - post iSCSI text WQE to hardware
455 * @conn: iscsi connection
456 * @mtask: driver command structure which is requesting
457 * a WQE to sent to chip for further processing
458 *
459 * prepare and post an iSCSI Text request WQE to CNIC firmware
460 */
461 int bnx2i_send_iscsi_text(struct bnx2i_conn *bnx2i_conn,
462 struct iscsi_task *mtask)
463 {
464 struct bnx2i_cmd *bnx2i_cmd;
465 struct bnx2i_text_request *text_wqe;
466 struct iscsi_text *text_hdr;
467 u32 dword;
468
469 bnx2i_cmd = (struct bnx2i_cmd *)mtask->dd_data;
470 text_hdr = (struct iscsi_text *)mtask->hdr;
471 text_wqe = (struct bnx2i_text_request *) bnx2i_conn->ep->qp.sq_prod_qe;
472
473 memset(text_wqe, 0, sizeof(struct bnx2i_text_request));
474
475 text_wqe->op_code = text_hdr->opcode;
476 text_wqe->op_attr = text_hdr->flags;
477 text_wqe->data_length = ntoh24(text_hdr->dlength);
478 text_wqe->itt = mtask->itt |
479 (ISCSI_TASK_TYPE_MPATH << ISCSI_TEXT_REQUEST_TYPE_SHIFT);
480 text_wqe->ttt = be32_to_cpu(text_hdr->ttt);
481
482 text_wqe->cmd_sn = be32_to_cpu(text_hdr->cmdsn);
483
484 text_wqe->resp_bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_bd_dma;
485 text_wqe->resp_bd_list_addr_hi =
486 (u32) ((u64) bnx2i_conn->gen_pdu.resp_bd_dma >> 32);
487
488 dword = ((1 << ISCSI_TEXT_REQUEST_NUM_RESP_BDS_SHIFT) |
489 (bnx2i_conn->gen_pdu.resp_buf_size <<
490 ISCSI_TEXT_REQUEST_RESP_BUFFER_LENGTH_SHIFT));
491 text_wqe->resp_buffer = dword;
492 text_wqe->bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.req_bd_dma;
493 text_wqe->bd_list_addr_hi =
494 (u32) ((u64) bnx2i_conn->gen_pdu.req_bd_dma >> 32);
495 text_wqe->num_bds = 1;
496 text_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
497
498 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
499 return 0;
500 }
501
502
503 /**
504 * bnx2i_send_iscsi_scsicmd - post iSCSI scsicmd request WQE to hardware
505 * @conn: iscsi connection
506 * @cmd: driver command structure which is requesting
507 * a WQE to sent to chip for further processing
508 *
509 * prepare and post an iSCSI SCSI-CMD request WQE to CNIC firmware
510 */
511 int bnx2i_send_iscsi_scsicmd(struct bnx2i_conn *bnx2i_conn,
512 struct bnx2i_cmd *cmd)
513 {
514 struct bnx2i_cmd_request *scsi_cmd_wqe;
515
516 scsi_cmd_wqe = (struct bnx2i_cmd_request *)
517 bnx2i_conn->ep->qp.sq_prod_qe;
518 memcpy(scsi_cmd_wqe, &cmd->req, sizeof(struct bnx2i_cmd_request));
519 scsi_cmd_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
520
521 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
522 return 0;
523 }
524
525 /**
526 * bnx2i_send_iscsi_nopout - post iSCSI NOPOUT request WQE to hardware
527 * @conn: iscsi connection
528 * @cmd: driver command structure which is requesting
529 * a WQE to sent to chip for further processing
530 * @datap: payload buffer pointer
531 * @data_len: payload data length
532 * @unsol: indicated whether nopout pdu is unsolicited pdu or
533 * in response to target's NOPIN w/ TTT != FFFFFFFF
534 *
535 * prepare and post a nopout request WQE to CNIC firmware
536 */
537 int bnx2i_send_iscsi_nopout(struct bnx2i_conn *bnx2i_conn,
538 struct iscsi_task *task,
539 char *datap, int data_len, int unsol)
540 {
541 struct bnx2i_endpoint *ep = bnx2i_conn->ep;
542 struct bnx2i_cmd *bnx2i_cmd;
543 struct bnx2i_nop_out_request *nopout_wqe;
544 struct iscsi_nopout *nopout_hdr;
545
546 bnx2i_cmd = (struct bnx2i_cmd *)task->dd_data;
547 nopout_hdr = (struct iscsi_nopout *)task->hdr;
548 nopout_wqe = (struct bnx2i_nop_out_request *)ep->qp.sq_prod_qe;
549
550 memset(nopout_wqe, 0x00, sizeof(struct bnx2i_nop_out_request));
551
552 nopout_wqe->op_code = nopout_hdr->opcode;
553 nopout_wqe->op_attr = ISCSI_FLAG_CMD_FINAL;
554 memcpy(nopout_wqe->lun, &nopout_hdr->lun, 8);
555
556 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
557 u32 tmp = nopout_wqe->lun[0];
558 /* 57710 requires LUN field to be swapped */
559 nopout_wqe->lun[0] = nopout_wqe->lun[1];
560 nopout_wqe->lun[1] = tmp;
561 }
562
563 nopout_wqe->itt = ((u16)task->itt |
564 (ISCSI_TASK_TYPE_MPATH <<
565 ISCSI_TMF_REQUEST_TYPE_SHIFT));
566 nopout_wqe->ttt = nopout_hdr->ttt;
567 nopout_wqe->flags = 0;
568 if (!unsol)
569 nopout_wqe->flags = ISCSI_NOP_OUT_REQUEST_LOCAL_COMPLETION;
570 else if (nopout_hdr->itt == RESERVED_ITT)
571 nopout_wqe->flags = ISCSI_NOP_OUT_REQUEST_LOCAL_COMPLETION;
572
573 nopout_wqe->cmd_sn = be32_to_cpu(nopout_hdr->cmdsn);
574 nopout_wqe->data_length = data_len;
575 if (data_len) {
576 /* handle payload data, not required in first release */
577 printk(KERN_ALERT "NOPOUT: WARNING!! payload len != 0\n");
578 } else {
579 nopout_wqe->bd_list_addr_lo = (u32)
580 bnx2i_conn->hba->mp_bd_dma;
581 nopout_wqe->bd_list_addr_hi =
582 (u32) ((u64) bnx2i_conn->hba->mp_bd_dma >> 32);
583 nopout_wqe->num_bds = 1;
584 }
585 nopout_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
586
587 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
588 return 0;
589 }
590
591
592 /**
593 * bnx2i_send_iscsi_logout - post iSCSI logout request WQE to hardware
594 * @conn: iscsi connection
595 * @cmd: driver command structure which is requesting
596 * a WQE to sent to chip for further processing
597 *
598 * prepare and post logout request WQE to CNIC firmware
599 */
600 int bnx2i_send_iscsi_logout(struct bnx2i_conn *bnx2i_conn,
601 struct iscsi_task *task)
602 {
603 struct bnx2i_cmd *bnx2i_cmd;
604 struct bnx2i_logout_request *logout_wqe;
605 struct iscsi_logout *logout_hdr;
606
607 bnx2i_cmd = (struct bnx2i_cmd *)task->dd_data;
608 logout_hdr = (struct iscsi_logout *)task->hdr;
609
610 logout_wqe = (struct bnx2i_logout_request *)
611 bnx2i_conn->ep->qp.sq_prod_qe;
612 memset(logout_wqe, 0x00, sizeof(struct bnx2i_logout_request));
613
614 logout_wqe->op_code = logout_hdr->opcode;
615 logout_wqe->cmd_sn = be32_to_cpu(logout_hdr->cmdsn);
616 logout_wqe->op_attr =
617 logout_hdr->flags | ISCSI_LOGOUT_REQUEST_ALWAYS_ONE;
618 logout_wqe->itt = ((u16)task->itt |
619 (ISCSI_TASK_TYPE_MPATH <<
620 ISCSI_LOGOUT_REQUEST_TYPE_SHIFT));
621 logout_wqe->data_length = 0;
622 logout_wqe->cid = 0;
623
624 logout_wqe->bd_list_addr_lo = (u32) bnx2i_conn->hba->mp_bd_dma;
625 logout_wqe->bd_list_addr_hi = (u32)
626 ((u64) bnx2i_conn->hba->mp_bd_dma >> 32);
627 logout_wqe->num_bds = 1;
628 logout_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
629
630 bnx2i_conn->ep->state = EP_STATE_LOGOUT_SENT;
631
632 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
633 return 0;
634 }
635
636
637 /**
638 * bnx2i_update_iscsi_conn - post iSCSI logout request WQE to hardware
639 * @conn: iscsi connection which requires iscsi parameter update
640 *
641 * sends down iSCSI Conn Update request to move iSCSI conn to FFP
642 */
643 void bnx2i_update_iscsi_conn(struct iscsi_conn *conn)
644 {
645 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
646 struct bnx2i_hba *hba = bnx2i_conn->hba;
647 struct kwqe *kwqe_arr[2];
648 struct iscsi_kwqe_conn_update *update_wqe;
649 struct iscsi_kwqe_conn_update conn_update_kwqe;
650
651 update_wqe = &conn_update_kwqe;
652
653 update_wqe->hdr.op_code = ISCSI_KWQE_OPCODE_UPDATE_CONN;
654 update_wqe->hdr.flags =
655 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
656
657 /* 5771x requires conn context id to be passed as is */
658 if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_conn->ep->hba->cnic_dev_type))
659 update_wqe->context_id = bnx2i_conn->ep->ep_cid;
660 else
661 update_wqe->context_id = (bnx2i_conn->ep->ep_cid >> 7);
662 update_wqe->conn_flags = 0;
663 if (conn->hdrdgst_en)
664 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_HEADER_DIGEST;
665 if (conn->datadgst_en)
666 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_DATA_DIGEST;
667 if (conn->session->initial_r2t_en)
668 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_INITIAL_R2T;
669 if (conn->session->imm_data_en)
670 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_IMMEDIATE_DATA;
671
672 update_wqe->max_send_pdu_length = conn->max_xmit_dlength;
673 update_wqe->max_recv_pdu_length = conn->max_recv_dlength;
674 update_wqe->first_burst_length = conn->session->first_burst;
675 update_wqe->max_burst_length = conn->session->max_burst;
676 update_wqe->exp_stat_sn = conn->exp_statsn;
677 update_wqe->max_outstanding_r2ts = conn->session->max_r2t;
678 update_wqe->session_error_recovery_level = conn->session->erl;
679 iscsi_conn_printk(KERN_ALERT, conn,
680 "bnx2i: conn update - MBL 0x%x FBL 0x%x"
681 "MRDSL_I 0x%x MRDSL_T 0x%x \n",
682 update_wqe->max_burst_length,
683 update_wqe->first_burst_length,
684 update_wqe->max_recv_pdu_length,
685 update_wqe->max_send_pdu_length);
686
687 kwqe_arr[0] = (struct kwqe *) update_wqe;
688 if (hba->cnic && hba->cnic->submit_kwqes)
689 hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 1);
690 }
691
692
693 /**
694 * bnx2i_ep_ofld_timer - post iSCSI logout request WQE to hardware
695 * @data: endpoint (transport handle) structure pointer
696 *
697 * routine to handle connection offload/destroy request timeout
698 */
699 void bnx2i_ep_ofld_timer(unsigned long data)
700 {
701 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) data;
702
703 if (ep->state == EP_STATE_OFLD_START) {
704 printk(KERN_ALERT "ofld_timer: CONN_OFLD timeout\n");
705 ep->state = EP_STATE_OFLD_FAILED;
706 } else if (ep->state == EP_STATE_DISCONN_START) {
707 printk(KERN_ALERT "ofld_timer: CONN_DISCON timeout\n");
708 ep->state = EP_STATE_DISCONN_TIMEDOUT;
709 } else if (ep->state == EP_STATE_CLEANUP_START) {
710 printk(KERN_ALERT "ofld_timer: CONN_CLEANUP timeout\n");
711 ep->state = EP_STATE_CLEANUP_FAILED;
712 }
713
714 wake_up_interruptible(&ep->ofld_wait);
715 }
716
717
718 static int bnx2i_power_of2(u32 val)
719 {
720 u32 power = 0;
721 if (val & (val - 1))
722 return power;
723 val--;
724 while (val) {
725 val = val >> 1;
726 power++;
727 }
728 return power;
729 }
730
731
732 /**
733 * bnx2i_send_cmd_cleanup_req - send iscsi cmd context clean-up request
734 * @hba: adapter structure pointer
735 * @cmd: driver command structure which is requesting
736 * a WQE to sent to chip for further processing
737 *
738 * prepares and posts CONN_OFLD_REQ1/2 KWQE
739 */
740 void bnx2i_send_cmd_cleanup_req(struct bnx2i_hba *hba, struct bnx2i_cmd *cmd)
741 {
742 struct bnx2i_cleanup_request *cmd_cleanup;
743
744 cmd_cleanup =
745 (struct bnx2i_cleanup_request *)cmd->conn->ep->qp.sq_prod_qe;
746 memset(cmd_cleanup, 0x00, sizeof(struct bnx2i_cleanup_request));
747
748 cmd_cleanup->op_code = ISCSI_OPCODE_CLEANUP_REQUEST;
749 cmd_cleanup->itt = cmd->req.itt;
750 cmd_cleanup->cq_index = 0; /* CQ# used for completion, 5771x only */
751
752 bnx2i_ring_dbell_update_sq_params(cmd->conn, 1);
753 }
754
755
756 /**
757 * bnx2i_send_conn_destroy - initiates iscsi connection teardown process
758 * @hba: adapter structure pointer
759 * @ep: endpoint (transport indentifier) structure
760 *
761 * this routine prepares and posts CONN_OFLD_REQ1/2 KWQE to initiate
762 * iscsi connection context clean-up process
763 */
764 int bnx2i_send_conn_destroy(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
765 {
766 struct kwqe *kwqe_arr[2];
767 struct iscsi_kwqe_conn_destroy conn_cleanup;
768 int rc = -EINVAL;
769
770 memset(&conn_cleanup, 0x00, sizeof(struct iscsi_kwqe_conn_destroy));
771
772 conn_cleanup.hdr.op_code = ISCSI_KWQE_OPCODE_DESTROY_CONN;
773 conn_cleanup.hdr.flags =
774 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
775 /* 5771x requires conn context id to be passed as is */
776 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
777 conn_cleanup.context_id = ep->ep_cid;
778 else
779 conn_cleanup.context_id = (ep->ep_cid >> 7);
780
781 conn_cleanup.reserved0 = (u16)ep->ep_iscsi_cid;
782
783 kwqe_arr[0] = (struct kwqe *) &conn_cleanup;
784 if (hba->cnic && hba->cnic->submit_kwqes)
785 rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 1);
786
787 return rc;
788 }
789
790
791 /**
792 * bnx2i_570x_send_conn_ofld_req - initiates iscsi conn context setup process
793 * @hba: adapter structure pointer
794 * @ep: endpoint (transport indentifier) structure
795 *
796 * 5706/5708/5709 specific - prepares and posts CONN_OFLD_REQ1/2 KWQE
797 */
798 static int bnx2i_570x_send_conn_ofld_req(struct bnx2i_hba *hba,
799 struct bnx2i_endpoint *ep)
800 {
801 struct kwqe *kwqe_arr[2];
802 struct iscsi_kwqe_conn_offload1 ofld_req1;
803 struct iscsi_kwqe_conn_offload2 ofld_req2;
804 dma_addr_t dma_addr;
805 int num_kwqes = 2;
806 u32 *ptbl;
807 int rc = -EINVAL;
808
809 ofld_req1.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN1;
810 ofld_req1.hdr.flags =
811 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
812
813 ofld_req1.iscsi_conn_id = (u16) ep->ep_iscsi_cid;
814
815 dma_addr = ep->qp.sq_pgtbl_phys;
816 ofld_req1.sq_page_table_addr_lo = (u32) dma_addr;
817 ofld_req1.sq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
818
819 dma_addr = ep->qp.cq_pgtbl_phys;
820 ofld_req1.cq_page_table_addr_lo = (u32) dma_addr;
821 ofld_req1.cq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
822
823 ofld_req2.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN2;
824 ofld_req2.hdr.flags =
825 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
826
827 dma_addr = ep->qp.rq_pgtbl_phys;
828 ofld_req2.rq_page_table_addr_lo = (u32) dma_addr;
829 ofld_req2.rq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
830
831 ptbl = (u32 *) ep->qp.sq_pgtbl_virt;
832
833 ofld_req2.sq_first_pte.hi = *ptbl++;
834 ofld_req2.sq_first_pte.lo = *ptbl;
835
836 ptbl = (u32 *) ep->qp.cq_pgtbl_virt;
837 ofld_req2.cq_first_pte.hi = *ptbl++;
838 ofld_req2.cq_first_pte.lo = *ptbl;
839
840 kwqe_arr[0] = (struct kwqe *) &ofld_req1;
841 kwqe_arr[1] = (struct kwqe *) &ofld_req2;
842 ofld_req2.num_additional_wqes = 0;
843
844 if (hba->cnic && hba->cnic->submit_kwqes)
845 rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, num_kwqes);
846
847 return rc;
848 }
849
850
851 /**
852 * bnx2i_5771x_send_conn_ofld_req - initiates iscsi connection context creation
853 * @hba: adapter structure pointer
854 * @ep: endpoint (transport indentifier) structure
855 *
856 * 57710 specific - prepares and posts CONN_OFLD_REQ1/2 KWQE
857 */
858 static int bnx2i_5771x_send_conn_ofld_req(struct bnx2i_hba *hba,
859 struct bnx2i_endpoint *ep)
860 {
861 struct kwqe *kwqe_arr[5];
862 struct iscsi_kwqe_conn_offload1 ofld_req1;
863 struct iscsi_kwqe_conn_offload2 ofld_req2;
864 struct iscsi_kwqe_conn_offload3 ofld_req3[1];
865 dma_addr_t dma_addr;
866 int num_kwqes = 2;
867 u32 *ptbl;
868 int rc = -EINVAL;
869
870 ofld_req1.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN1;
871 ofld_req1.hdr.flags =
872 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
873
874 ofld_req1.iscsi_conn_id = (u16) ep->ep_iscsi_cid;
875
876 dma_addr = ep->qp.sq_pgtbl_phys + ISCSI_SQ_DB_SIZE;
877 ofld_req1.sq_page_table_addr_lo = (u32) dma_addr;
878 ofld_req1.sq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
879
880 dma_addr = ep->qp.cq_pgtbl_phys + ISCSI_CQ_DB_SIZE;
881 ofld_req1.cq_page_table_addr_lo = (u32) dma_addr;
882 ofld_req1.cq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
883
884 ofld_req2.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN2;
885 ofld_req2.hdr.flags =
886 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
887
888 dma_addr = ep->qp.rq_pgtbl_phys + ISCSI_RQ_DB_SIZE;
889 ofld_req2.rq_page_table_addr_lo = (u32) dma_addr;
890 ofld_req2.rq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
891
892 ptbl = (u32 *)((u8 *)ep->qp.sq_pgtbl_virt + ISCSI_SQ_DB_SIZE);
893 ofld_req2.sq_first_pte.hi = *ptbl++;
894 ofld_req2.sq_first_pte.lo = *ptbl;
895
896 ptbl = (u32 *)((u8 *)ep->qp.cq_pgtbl_virt + ISCSI_CQ_DB_SIZE);
897 ofld_req2.cq_first_pte.hi = *ptbl++;
898 ofld_req2.cq_first_pte.lo = *ptbl;
899
900 kwqe_arr[0] = (struct kwqe *) &ofld_req1;
901 kwqe_arr[1] = (struct kwqe *) &ofld_req2;
902
903 ofld_req2.num_additional_wqes = 1;
904 memset(ofld_req3, 0x00, sizeof(ofld_req3[0]));
905 ptbl = (u32 *)((u8 *)ep->qp.rq_pgtbl_virt + ISCSI_RQ_DB_SIZE);
906 ofld_req3[0].qp_first_pte[0].hi = *ptbl++;
907 ofld_req3[0].qp_first_pte[0].lo = *ptbl;
908
909 kwqe_arr[2] = (struct kwqe *) ofld_req3;
910 /* need if we decide to go with multiple KCQE's per conn */
911 num_kwqes += 1;
912
913 if (hba->cnic && hba->cnic->submit_kwqes)
914 rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, num_kwqes);
915
916 return rc;
917 }
918
919 /**
920 * bnx2i_send_conn_ofld_req - initiates iscsi connection context setup process
921 *
922 * @hba: adapter structure pointer
923 * @ep: endpoint (transport indentifier) structure
924 *
925 * this routine prepares and posts CONN_OFLD_REQ1/2 KWQE
926 */
927 int bnx2i_send_conn_ofld_req(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
928 {
929 int rc;
930
931 if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type))
932 rc = bnx2i_5771x_send_conn_ofld_req(hba, ep);
933 else
934 rc = bnx2i_570x_send_conn_ofld_req(hba, ep);
935
936 return rc;
937 }
938
939
940 /**
941 * setup_qp_page_tables - iscsi QP page table setup function
942 * @ep: endpoint (transport indentifier) structure
943 *
944 * Sets up page tables for SQ/RQ/CQ, 1G/sec (5706/5708/5709) devices requires
945 * 64-bit address in big endian format. Whereas 10G/sec (57710) requires
946 * PT in little endian format
947 */
948 static void setup_qp_page_tables(struct bnx2i_endpoint *ep)
949 {
950 int num_pages;
951 u32 *ptbl;
952 dma_addr_t page;
953 int cnic_dev_10g;
954
955 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
956 cnic_dev_10g = 1;
957 else
958 cnic_dev_10g = 0;
959
960 /* SQ page table */
961 memset(ep->qp.sq_pgtbl_virt, 0, ep->qp.sq_pgtbl_size);
962 num_pages = ep->qp.sq_mem_size / PAGE_SIZE;
963 page = ep->qp.sq_phys;
964
965 if (cnic_dev_10g)
966 ptbl = (u32 *)((u8 *)ep->qp.sq_pgtbl_virt + ISCSI_SQ_DB_SIZE);
967 else
968 ptbl = (u32 *) ep->qp.sq_pgtbl_virt;
969 while (num_pages--) {
970 if (cnic_dev_10g) {
971 /* PTE is written in little endian format for 57710 */
972 *ptbl = (u32) page;
973 ptbl++;
974 *ptbl = (u32) ((u64) page >> 32);
975 ptbl++;
976 page += PAGE_SIZE;
977 } else {
978 /* PTE is written in big endian format for
979 * 5706/5708/5709 devices */
980 *ptbl = (u32) ((u64) page >> 32);
981 ptbl++;
982 *ptbl = (u32) page;
983 ptbl++;
984 page += PAGE_SIZE;
985 }
986 }
987
988 /* RQ page table */
989 memset(ep->qp.rq_pgtbl_virt, 0, ep->qp.rq_pgtbl_size);
990 num_pages = ep->qp.rq_mem_size / PAGE_SIZE;
991 page = ep->qp.rq_phys;
992
993 if (cnic_dev_10g)
994 ptbl = (u32 *)((u8 *)ep->qp.rq_pgtbl_virt + ISCSI_RQ_DB_SIZE);
995 else
996 ptbl = (u32 *) ep->qp.rq_pgtbl_virt;
997 while (num_pages--) {
998 if (cnic_dev_10g) {
999 /* PTE is written in little endian format for 57710 */
1000 *ptbl = (u32) page;
1001 ptbl++;
1002 *ptbl = (u32) ((u64) page >> 32);
1003 ptbl++;
1004 page += PAGE_SIZE;
1005 } else {
1006 /* PTE is written in big endian format for
1007 * 5706/5708/5709 devices */
1008 *ptbl = (u32) ((u64) page >> 32);
1009 ptbl++;
1010 *ptbl = (u32) page;
1011 ptbl++;
1012 page += PAGE_SIZE;
1013 }
1014 }
1015
1016 /* CQ page table */
1017 memset(ep->qp.cq_pgtbl_virt, 0, ep->qp.cq_pgtbl_size);
1018 num_pages = ep->qp.cq_mem_size / PAGE_SIZE;
1019 page = ep->qp.cq_phys;
1020
1021 if (cnic_dev_10g)
1022 ptbl = (u32 *)((u8 *)ep->qp.cq_pgtbl_virt + ISCSI_CQ_DB_SIZE);
1023 else
1024 ptbl = (u32 *) ep->qp.cq_pgtbl_virt;
1025 while (num_pages--) {
1026 if (cnic_dev_10g) {
1027 /* PTE is written in little endian format for 57710 */
1028 *ptbl = (u32) page;
1029 ptbl++;
1030 *ptbl = (u32) ((u64) page >> 32);
1031 ptbl++;
1032 page += PAGE_SIZE;
1033 } else {
1034 /* PTE is written in big endian format for
1035 * 5706/5708/5709 devices */
1036 *ptbl = (u32) ((u64) page >> 32);
1037 ptbl++;
1038 *ptbl = (u32) page;
1039 ptbl++;
1040 page += PAGE_SIZE;
1041 }
1042 }
1043 }
1044
1045
1046 /**
1047 * bnx2i_alloc_qp_resc - allocates required resources for QP.
1048 * @hba: adapter structure pointer
1049 * @ep: endpoint (transport indentifier) structure
1050 *
1051 * Allocate QP (transport layer for iSCSI connection) resources, DMA'able
1052 * memory for SQ/RQ/CQ and page tables. EP structure elements such
1053 * as producer/consumer indexes/pointers, queue sizes and page table
1054 * contents are setup
1055 */
1056 int bnx2i_alloc_qp_resc(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
1057 {
1058 struct bnx2i_5771x_cq_db *cq_db;
1059
1060 ep->hba = hba;
1061 ep->conn = NULL;
1062 ep->ep_cid = ep->ep_iscsi_cid = ep->ep_pg_cid = 0;
1063
1064 /* Allocate page table memory for SQ which is page aligned */
1065 ep->qp.sq_mem_size = hba->max_sqes * BNX2I_SQ_WQE_SIZE;
1066 ep->qp.sq_mem_size =
1067 (ep->qp.sq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
1068 ep->qp.sq_pgtbl_size =
1069 (ep->qp.sq_mem_size / PAGE_SIZE) * sizeof(void *);
1070 ep->qp.sq_pgtbl_size =
1071 (ep->qp.sq_pgtbl_size + (PAGE_SIZE - 1)) & PAGE_MASK;
1072
1073 ep->qp.sq_pgtbl_virt =
1074 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.sq_pgtbl_size,
1075 &ep->qp.sq_pgtbl_phys, GFP_KERNEL);
1076 if (!ep->qp.sq_pgtbl_virt) {
1077 printk(KERN_ALERT "bnx2i: unable to alloc SQ PT mem (%d)\n",
1078 ep->qp.sq_pgtbl_size);
1079 goto mem_alloc_err;
1080 }
1081
1082 /* Allocate memory area for actual SQ element */
1083 ep->qp.sq_virt =
1084 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.sq_mem_size,
1085 &ep->qp.sq_phys, GFP_KERNEL);
1086 if (!ep->qp.sq_virt) {
1087 printk(KERN_ALERT "bnx2i: unable to alloc SQ BD memory %d\n",
1088 ep->qp.sq_mem_size);
1089 goto mem_alloc_err;
1090 }
1091
1092 memset(ep->qp.sq_virt, 0x00, ep->qp.sq_mem_size);
1093 ep->qp.sq_first_qe = ep->qp.sq_virt;
1094 ep->qp.sq_prod_qe = ep->qp.sq_first_qe;
1095 ep->qp.sq_cons_qe = ep->qp.sq_first_qe;
1096 ep->qp.sq_last_qe = &ep->qp.sq_first_qe[hba->max_sqes - 1];
1097 ep->qp.sq_prod_idx = 0;
1098 ep->qp.sq_cons_idx = 0;
1099 ep->qp.sqe_left = hba->max_sqes;
1100
1101 /* Allocate page table memory for CQ which is page aligned */
1102 ep->qp.cq_mem_size = hba->max_cqes * BNX2I_CQE_SIZE;
1103 ep->qp.cq_mem_size =
1104 (ep->qp.cq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
1105 ep->qp.cq_pgtbl_size =
1106 (ep->qp.cq_mem_size / PAGE_SIZE) * sizeof(void *);
1107 ep->qp.cq_pgtbl_size =
1108 (ep->qp.cq_pgtbl_size + (PAGE_SIZE - 1)) & PAGE_MASK;
1109
1110 ep->qp.cq_pgtbl_virt =
1111 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.cq_pgtbl_size,
1112 &ep->qp.cq_pgtbl_phys, GFP_KERNEL);
1113 if (!ep->qp.cq_pgtbl_virt) {
1114 printk(KERN_ALERT "bnx2i: unable to alloc CQ PT memory %d\n",
1115 ep->qp.cq_pgtbl_size);
1116 goto mem_alloc_err;
1117 }
1118
1119 /* Allocate memory area for actual CQ element */
1120 ep->qp.cq_virt =
1121 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.cq_mem_size,
1122 &ep->qp.cq_phys, GFP_KERNEL);
1123 if (!ep->qp.cq_virt) {
1124 printk(KERN_ALERT "bnx2i: unable to alloc CQ BD memory %d\n",
1125 ep->qp.cq_mem_size);
1126 goto mem_alloc_err;
1127 }
1128 memset(ep->qp.cq_virt, 0x00, ep->qp.cq_mem_size);
1129
1130 ep->qp.cq_first_qe = ep->qp.cq_virt;
1131 ep->qp.cq_prod_qe = ep->qp.cq_first_qe;
1132 ep->qp.cq_cons_qe = ep->qp.cq_first_qe;
1133 ep->qp.cq_last_qe = &ep->qp.cq_first_qe[hba->max_cqes - 1];
1134 ep->qp.cq_prod_idx = 0;
1135 ep->qp.cq_cons_idx = 0;
1136 ep->qp.cqe_left = hba->max_cqes;
1137 ep->qp.cqe_exp_seq_sn = ISCSI_INITIAL_SN;
1138 ep->qp.cqe_size = hba->max_cqes;
1139
1140 /* Invalidate all EQ CQE index, req only for 57710 */
1141 cq_db = (struct bnx2i_5771x_cq_db *) ep->qp.cq_pgtbl_virt;
1142 memset(cq_db->sqn, 0xFF, sizeof(cq_db->sqn[0]) * BNX2X_MAX_CQS);
1143
1144 /* Allocate page table memory for RQ which is page aligned */
1145 ep->qp.rq_mem_size = hba->max_rqes * BNX2I_RQ_WQE_SIZE;
1146 ep->qp.rq_mem_size =
1147 (ep->qp.rq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
1148 ep->qp.rq_pgtbl_size =
1149 (ep->qp.rq_mem_size / PAGE_SIZE) * sizeof(void *);
1150 ep->qp.rq_pgtbl_size =
1151 (ep->qp.rq_pgtbl_size + (PAGE_SIZE - 1)) & PAGE_MASK;
1152
1153 ep->qp.rq_pgtbl_virt =
1154 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.rq_pgtbl_size,
1155 &ep->qp.rq_pgtbl_phys, GFP_KERNEL);
1156 if (!ep->qp.rq_pgtbl_virt) {
1157 printk(KERN_ALERT "bnx2i: unable to alloc RQ PT mem %d\n",
1158 ep->qp.rq_pgtbl_size);
1159 goto mem_alloc_err;
1160 }
1161
1162 /* Allocate memory area for actual RQ element */
1163 ep->qp.rq_virt =
1164 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.rq_mem_size,
1165 &ep->qp.rq_phys, GFP_KERNEL);
1166 if (!ep->qp.rq_virt) {
1167 printk(KERN_ALERT "bnx2i: unable to alloc RQ BD memory %d\n",
1168 ep->qp.rq_mem_size);
1169 goto mem_alloc_err;
1170 }
1171
1172 ep->qp.rq_first_qe = ep->qp.rq_virt;
1173 ep->qp.rq_prod_qe = ep->qp.rq_first_qe;
1174 ep->qp.rq_cons_qe = ep->qp.rq_first_qe;
1175 ep->qp.rq_last_qe = &ep->qp.rq_first_qe[hba->max_rqes - 1];
1176 ep->qp.rq_prod_idx = 0x8000;
1177 ep->qp.rq_cons_idx = 0;
1178 ep->qp.rqe_left = hba->max_rqes;
1179
1180 setup_qp_page_tables(ep);
1181
1182 return 0;
1183
1184 mem_alloc_err:
1185 bnx2i_free_qp_resc(hba, ep);
1186 return -ENOMEM;
1187 }
1188
1189
1190
1191 /**
1192 * bnx2i_free_qp_resc - free memory resources held by QP
1193 * @hba: adapter structure pointer
1194 * @ep: endpoint (transport indentifier) structure
1195 *
1196 * Free QP resources - SQ/RQ/CQ memory and page tables.
1197 */
1198 void bnx2i_free_qp_resc(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
1199 {
1200 if (ep->qp.ctx_base) {
1201 iounmap(ep->qp.ctx_base);
1202 ep->qp.ctx_base = NULL;
1203 }
1204 /* Free SQ mem */
1205 if (ep->qp.sq_pgtbl_virt) {
1206 dma_free_coherent(&hba->pcidev->dev, ep->qp.sq_pgtbl_size,
1207 ep->qp.sq_pgtbl_virt, ep->qp.sq_pgtbl_phys);
1208 ep->qp.sq_pgtbl_virt = NULL;
1209 ep->qp.sq_pgtbl_phys = 0;
1210 }
1211 if (ep->qp.sq_virt) {
1212 dma_free_coherent(&hba->pcidev->dev, ep->qp.sq_mem_size,
1213 ep->qp.sq_virt, ep->qp.sq_phys);
1214 ep->qp.sq_virt = NULL;
1215 ep->qp.sq_phys = 0;
1216 }
1217
1218 /* Free RQ mem */
1219 if (ep->qp.rq_pgtbl_virt) {
1220 dma_free_coherent(&hba->pcidev->dev, ep->qp.rq_pgtbl_size,
1221 ep->qp.rq_pgtbl_virt, ep->qp.rq_pgtbl_phys);
1222 ep->qp.rq_pgtbl_virt = NULL;
1223 ep->qp.rq_pgtbl_phys = 0;
1224 }
1225 if (ep->qp.rq_virt) {
1226 dma_free_coherent(&hba->pcidev->dev, ep->qp.rq_mem_size,
1227 ep->qp.rq_virt, ep->qp.rq_phys);
1228 ep->qp.rq_virt = NULL;
1229 ep->qp.rq_phys = 0;
1230 }
1231
1232 /* Free CQ mem */
1233 if (ep->qp.cq_pgtbl_virt) {
1234 dma_free_coherent(&hba->pcidev->dev, ep->qp.cq_pgtbl_size,
1235 ep->qp.cq_pgtbl_virt, ep->qp.cq_pgtbl_phys);
1236 ep->qp.cq_pgtbl_virt = NULL;
1237 ep->qp.cq_pgtbl_phys = 0;
1238 }
1239 if (ep->qp.cq_virt) {
1240 dma_free_coherent(&hba->pcidev->dev, ep->qp.cq_mem_size,
1241 ep->qp.cq_virt, ep->qp.cq_phys);
1242 ep->qp.cq_virt = NULL;
1243 ep->qp.cq_phys = 0;
1244 }
1245 }
1246
1247
1248 /**
1249 * bnx2i_send_fw_iscsi_init_msg - initiates initial handshake with iscsi f/w
1250 * @hba: adapter structure pointer
1251 *
1252 * Send down iscsi_init KWQEs which initiates the initial handshake with the f/w
1253 * This results in iSCSi support validation and on-chip context manager
1254 * initialization. Firmware completes this handshake with a CQE carrying
1255 * the result of iscsi support validation. Parameter carried by
1256 * iscsi init request determines the number of offloaded connection and
1257 * tolerance level for iscsi protocol violation this hba/chip can support
1258 */
1259 int bnx2i_send_fw_iscsi_init_msg(struct bnx2i_hba *hba)
1260 {
1261 struct kwqe *kwqe_arr[3];
1262 struct iscsi_kwqe_init1 iscsi_init;
1263 struct iscsi_kwqe_init2 iscsi_init2;
1264 int rc = 0;
1265 u64 mask64;
1266
1267 bnx2i_adjust_qp_size(hba);
1268
1269 iscsi_init.flags =
1270 ISCSI_PAGE_SIZE_4K << ISCSI_KWQE_INIT1_PAGE_SIZE_SHIFT;
1271 if (en_tcp_dack)
1272 iscsi_init.flags |= ISCSI_KWQE_INIT1_DELAYED_ACK_ENABLE;
1273 iscsi_init.reserved0 = 0;
1274 iscsi_init.num_cqs = 1;
1275 iscsi_init.hdr.op_code = ISCSI_KWQE_OPCODE_INIT1;
1276 iscsi_init.hdr.flags =
1277 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
1278
1279 iscsi_init.dummy_buffer_addr_lo = (u32) hba->dummy_buf_dma;
1280 iscsi_init.dummy_buffer_addr_hi =
1281 (u32) ((u64) hba->dummy_buf_dma >> 32);
1282
1283 hba->num_ccell = hba->max_sqes >> 1;
1284 hba->ctx_ccell_tasks =
1285 ((hba->num_ccell & 0xFFFF) | (hba->max_sqes << 16));
1286 iscsi_init.num_ccells_per_conn = hba->num_ccell;
1287 iscsi_init.num_tasks_per_conn = hba->max_sqes;
1288 iscsi_init.sq_wqes_per_page = PAGE_SIZE / BNX2I_SQ_WQE_SIZE;
1289 iscsi_init.sq_num_wqes = hba->max_sqes;
1290 iscsi_init.cq_log_wqes_per_page =
1291 (u8) bnx2i_power_of2(PAGE_SIZE / BNX2I_CQE_SIZE);
1292 iscsi_init.cq_num_wqes = hba->max_cqes;
1293 iscsi_init.cq_num_pages = (hba->max_cqes * BNX2I_CQE_SIZE +
1294 (PAGE_SIZE - 1)) / PAGE_SIZE;
1295 iscsi_init.sq_num_pages = (hba->max_sqes * BNX2I_SQ_WQE_SIZE +
1296 (PAGE_SIZE - 1)) / PAGE_SIZE;
1297 iscsi_init.rq_buffer_size = BNX2I_RQ_WQE_SIZE;
1298 iscsi_init.rq_num_wqes = hba->max_rqes;
1299
1300
1301 iscsi_init2.hdr.op_code = ISCSI_KWQE_OPCODE_INIT2;
1302 iscsi_init2.hdr.flags =
1303 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
1304 iscsi_init2.max_cq_sqn = hba->max_cqes * 2 + 1;
1305 mask64 = 0x0ULL;
1306 mask64 |= (
1307 /* CISCO MDS */
1308 (1UL <<
1309 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_NOT_RSRV) |
1310 /* HP MSA1510i */
1311 (1UL <<
1312 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_EXP_DATASN) |
1313 /* EMC */
1314 (1ULL << ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_LUN));
1315 if (error_mask1)
1316 iscsi_init2.error_bit_map[0] = error_mask1;
1317 else
1318 iscsi_init2.error_bit_map[0] = (u32) mask64;
1319
1320 if (error_mask2)
1321 iscsi_init2.error_bit_map[1] = error_mask2;
1322 else
1323 iscsi_init2.error_bit_map[1] = (u32) (mask64 >> 32);
1324
1325 iscsi_error_mask = mask64;
1326
1327 kwqe_arr[0] = (struct kwqe *) &iscsi_init;
1328 kwqe_arr[1] = (struct kwqe *) &iscsi_init2;
1329
1330 if (hba->cnic && hba->cnic->submit_kwqes)
1331 rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 2);
1332 return rc;
1333 }
1334
1335
1336 /**
1337 * bnx2i_process_scsi_cmd_resp - this function handles scsi cmd completion.
1338 * @session: iscsi session
1339 * @bnx2i_conn: bnx2i connection
1340 * @cqe: pointer to newly DMA'ed CQE entry for processing
1341 *
1342 * process SCSI CMD Response CQE & complete the request to SCSI-ML
1343 */
1344 int bnx2i_process_scsi_cmd_resp(struct iscsi_session *session,
1345 struct bnx2i_conn *bnx2i_conn,
1346 struct cqe *cqe)
1347 {
1348 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1349 struct bnx2i_cmd_response *resp_cqe;
1350 struct bnx2i_cmd *bnx2i_cmd;
1351 struct iscsi_task *task;
1352 struct iscsi_scsi_rsp *hdr;
1353 u32 datalen = 0;
1354
1355 resp_cqe = (struct bnx2i_cmd_response *)cqe;
1356 spin_lock_bh(&session->lock);
1357 task = iscsi_itt_to_task(conn,
1358 resp_cqe->itt & ISCSI_CMD_RESPONSE_INDEX);
1359 if (!task)
1360 goto fail;
1361
1362 bnx2i_cmd = task->dd_data;
1363
1364 if (bnx2i_cmd->req.op_attr & ISCSI_CMD_REQUEST_READ) {
1365 conn->datain_pdus_cnt +=
1366 resp_cqe->task_stat.read_stat.num_data_outs;
1367 conn->rxdata_octets +=
1368 bnx2i_cmd->req.total_data_transfer_length;
1369 } else {
1370 conn->dataout_pdus_cnt +=
1371 resp_cqe->task_stat.read_stat.num_data_outs;
1372 conn->r2t_pdus_cnt +=
1373 resp_cqe->task_stat.read_stat.num_r2ts;
1374 conn->txdata_octets +=
1375 bnx2i_cmd->req.total_data_transfer_length;
1376 }
1377 bnx2i_iscsi_unmap_sg_list(bnx2i_cmd);
1378
1379 hdr = (struct iscsi_scsi_rsp *)task->hdr;
1380 resp_cqe = (struct bnx2i_cmd_response *)cqe;
1381 hdr->opcode = resp_cqe->op_code;
1382 hdr->max_cmdsn = cpu_to_be32(resp_cqe->max_cmd_sn);
1383 hdr->exp_cmdsn = cpu_to_be32(resp_cqe->exp_cmd_sn);
1384 hdr->response = resp_cqe->response;
1385 hdr->cmd_status = resp_cqe->status;
1386 hdr->flags = resp_cqe->response_flags;
1387 hdr->residual_count = cpu_to_be32(resp_cqe->residual_count);
1388
1389 if (resp_cqe->op_code == ISCSI_OP_SCSI_DATA_IN)
1390 goto done;
1391
1392 if (resp_cqe->status == SAM_STAT_CHECK_CONDITION) {
1393 datalen = resp_cqe->data_length;
1394 if (datalen < 2)
1395 goto done;
1396
1397 if (datalen > BNX2I_RQ_WQE_SIZE) {
1398 iscsi_conn_printk(KERN_ERR, conn,
1399 "sense data len %d > RQ sz\n",
1400 datalen);
1401 datalen = BNX2I_RQ_WQE_SIZE;
1402 } else if (datalen > ISCSI_DEF_MAX_RECV_SEG_LEN) {
1403 iscsi_conn_printk(KERN_ERR, conn,
1404 "sense data len %d > conn data\n",
1405 datalen);
1406 datalen = ISCSI_DEF_MAX_RECV_SEG_LEN;
1407 }
1408
1409 bnx2i_get_rq_buf(bnx2i_cmd->conn, conn->data, datalen);
1410 bnx2i_put_rq_buf(bnx2i_cmd->conn, 1);
1411 }
1412
1413 done:
1414 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr,
1415 conn->data, datalen);
1416 fail:
1417 spin_unlock_bh(&session->lock);
1418 return 0;
1419 }
1420
1421
1422 /**
1423 * bnx2i_process_login_resp - this function handles iscsi login response
1424 * @session: iscsi session pointer
1425 * @bnx2i_conn: iscsi connection pointer
1426 * @cqe: pointer to newly DMA'ed CQE entry for processing
1427 *
1428 * process Login Response CQE & complete it to open-iscsi user daemon
1429 */
1430 static int bnx2i_process_login_resp(struct iscsi_session *session,
1431 struct bnx2i_conn *bnx2i_conn,
1432 struct cqe *cqe)
1433 {
1434 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1435 struct iscsi_task *task;
1436 struct bnx2i_login_response *login;
1437 struct iscsi_login_rsp *resp_hdr;
1438 int pld_len;
1439 int pad_len;
1440
1441 login = (struct bnx2i_login_response *) cqe;
1442 spin_lock(&session->lock);
1443 task = iscsi_itt_to_task(conn,
1444 login->itt & ISCSI_LOGIN_RESPONSE_INDEX);
1445 if (!task)
1446 goto done;
1447
1448 resp_hdr = (struct iscsi_login_rsp *) &bnx2i_conn->gen_pdu.resp_hdr;
1449 memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1450 resp_hdr->opcode = login->op_code;
1451 resp_hdr->flags = login->response_flags;
1452 resp_hdr->max_version = login->version_max;
1453 resp_hdr->active_version = login->version_active;
1454 resp_hdr->hlength = 0;
1455
1456 hton24(resp_hdr->dlength, login->data_length);
1457 memcpy(resp_hdr->isid, &login->isid_lo, 6);
1458 resp_hdr->tsih = cpu_to_be16(login->tsih);
1459 resp_hdr->itt = task->hdr->itt;
1460 resp_hdr->statsn = cpu_to_be32(login->stat_sn);
1461 resp_hdr->exp_cmdsn = cpu_to_be32(login->exp_cmd_sn);
1462 resp_hdr->max_cmdsn = cpu_to_be32(login->max_cmd_sn);
1463 resp_hdr->status_class = login->status_class;
1464 resp_hdr->status_detail = login->status_detail;
1465 pld_len = login->data_length;
1466 bnx2i_conn->gen_pdu.resp_wr_ptr =
1467 bnx2i_conn->gen_pdu.resp_buf + pld_len;
1468
1469 pad_len = 0;
1470 if (pld_len & 0x3)
1471 pad_len = 4 - (pld_len % 4);
1472
1473 if (pad_len) {
1474 int i = 0;
1475 for (i = 0; i < pad_len; i++) {
1476 bnx2i_conn->gen_pdu.resp_wr_ptr[0] = 0;
1477 bnx2i_conn->gen_pdu.resp_wr_ptr++;
1478 }
1479 }
1480
1481 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr,
1482 bnx2i_conn->gen_pdu.resp_buf,
1483 bnx2i_conn->gen_pdu.resp_wr_ptr - bnx2i_conn->gen_pdu.resp_buf);
1484 done:
1485 spin_unlock(&session->lock);
1486 return 0;
1487 }
1488
1489
1490 /**
1491 * bnx2i_process_text_resp - this function handles iscsi text response
1492 * @session: iscsi session pointer
1493 * @bnx2i_conn: iscsi connection pointer
1494 * @cqe: pointer to newly DMA'ed CQE entry for processing
1495 *
1496 * process iSCSI Text Response CQE& complete it to open-iscsi user daemon
1497 */
1498 static int bnx2i_process_text_resp(struct iscsi_session *session,
1499 struct bnx2i_conn *bnx2i_conn,
1500 struct cqe *cqe)
1501 {
1502 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1503 struct iscsi_task *task;
1504 struct bnx2i_text_response *text;
1505 struct iscsi_text_rsp *resp_hdr;
1506 int pld_len;
1507 int pad_len;
1508
1509 text = (struct bnx2i_text_response *) cqe;
1510 spin_lock(&session->lock);
1511 task = iscsi_itt_to_task(conn, text->itt & ISCSI_LOGIN_RESPONSE_INDEX);
1512 if (!task)
1513 goto done;
1514
1515 resp_hdr = (struct iscsi_text_rsp *)&bnx2i_conn->gen_pdu.resp_hdr;
1516 memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1517 resp_hdr->opcode = text->op_code;
1518 resp_hdr->flags = text->response_flags;
1519 resp_hdr->hlength = 0;
1520
1521 hton24(resp_hdr->dlength, text->data_length);
1522 resp_hdr->itt = task->hdr->itt;
1523 resp_hdr->ttt = cpu_to_be32(text->ttt);
1524 resp_hdr->statsn = task->hdr->exp_statsn;
1525 resp_hdr->exp_cmdsn = cpu_to_be32(text->exp_cmd_sn);
1526 resp_hdr->max_cmdsn = cpu_to_be32(text->max_cmd_sn);
1527 pld_len = text->data_length;
1528 bnx2i_conn->gen_pdu.resp_wr_ptr = bnx2i_conn->gen_pdu.resp_buf +
1529 pld_len;
1530 pad_len = 0;
1531 if (pld_len & 0x3)
1532 pad_len = 4 - (pld_len % 4);
1533
1534 if (pad_len) {
1535 int i = 0;
1536 for (i = 0; i < pad_len; i++) {
1537 bnx2i_conn->gen_pdu.resp_wr_ptr[0] = 0;
1538 bnx2i_conn->gen_pdu.resp_wr_ptr++;
1539 }
1540 }
1541 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr,
1542 bnx2i_conn->gen_pdu.resp_buf,
1543 bnx2i_conn->gen_pdu.resp_wr_ptr -
1544 bnx2i_conn->gen_pdu.resp_buf);
1545 done:
1546 spin_unlock(&session->lock);
1547 return 0;
1548 }
1549
1550
1551 /**
1552 * bnx2i_process_tmf_resp - this function handles iscsi TMF response
1553 * @session: iscsi session pointer
1554 * @bnx2i_conn: iscsi connection pointer
1555 * @cqe: pointer to newly DMA'ed CQE entry for processing
1556 *
1557 * process iSCSI TMF Response CQE and wake up the driver eh thread.
1558 */
1559 static int bnx2i_process_tmf_resp(struct iscsi_session *session,
1560 struct bnx2i_conn *bnx2i_conn,
1561 struct cqe *cqe)
1562 {
1563 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1564 struct iscsi_task *task;
1565 struct bnx2i_tmf_response *tmf_cqe;
1566 struct iscsi_tm_rsp *resp_hdr;
1567
1568 tmf_cqe = (struct bnx2i_tmf_response *)cqe;
1569 spin_lock(&session->lock);
1570 task = iscsi_itt_to_task(conn,
1571 tmf_cqe->itt & ISCSI_TMF_RESPONSE_INDEX);
1572 if (!task)
1573 goto done;
1574
1575 resp_hdr = (struct iscsi_tm_rsp *) &bnx2i_conn->gen_pdu.resp_hdr;
1576 memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1577 resp_hdr->opcode = tmf_cqe->op_code;
1578 resp_hdr->max_cmdsn = cpu_to_be32(tmf_cqe->max_cmd_sn);
1579 resp_hdr->exp_cmdsn = cpu_to_be32(tmf_cqe->exp_cmd_sn);
1580 resp_hdr->itt = task->hdr->itt;
1581 resp_hdr->response = tmf_cqe->response;
1582
1583 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0);
1584 done:
1585 spin_unlock(&session->lock);
1586 return 0;
1587 }
1588
1589 /**
1590 * bnx2i_process_logout_resp - this function handles iscsi logout response
1591 * @session: iscsi session pointer
1592 * @bnx2i_conn: iscsi connection pointer
1593 * @cqe: pointer to newly DMA'ed CQE entry for processing
1594 *
1595 * process iSCSI Logout Response CQE & make function call to
1596 * notify the user daemon.
1597 */
1598 static int bnx2i_process_logout_resp(struct iscsi_session *session,
1599 struct bnx2i_conn *bnx2i_conn,
1600 struct cqe *cqe)
1601 {
1602 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1603 struct iscsi_task *task;
1604 struct bnx2i_logout_response *logout;
1605 struct iscsi_logout_rsp *resp_hdr;
1606
1607 logout = (struct bnx2i_logout_response *) cqe;
1608 spin_lock(&session->lock);
1609 task = iscsi_itt_to_task(conn,
1610 logout->itt & ISCSI_LOGOUT_RESPONSE_INDEX);
1611 if (!task)
1612 goto done;
1613
1614 resp_hdr = (struct iscsi_logout_rsp *) &bnx2i_conn->gen_pdu.resp_hdr;
1615 memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1616 resp_hdr->opcode = logout->op_code;
1617 resp_hdr->flags = logout->response;
1618 resp_hdr->hlength = 0;
1619
1620 resp_hdr->itt = task->hdr->itt;
1621 resp_hdr->statsn = task->hdr->exp_statsn;
1622 resp_hdr->exp_cmdsn = cpu_to_be32(logout->exp_cmd_sn);
1623 resp_hdr->max_cmdsn = cpu_to_be32(logout->max_cmd_sn);
1624
1625 resp_hdr->t2wait = cpu_to_be32(logout->time_to_wait);
1626 resp_hdr->t2retain = cpu_to_be32(logout->time_to_retain);
1627
1628 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0);
1629
1630 bnx2i_conn->ep->state = EP_STATE_LOGOUT_RESP_RCVD;
1631 done:
1632 spin_unlock(&session->lock);
1633 return 0;
1634 }
1635
1636 /**
1637 * bnx2i_process_nopin_local_cmpl - this function handles iscsi nopin CQE
1638 * @session: iscsi session pointer
1639 * @bnx2i_conn: iscsi connection pointer
1640 * @cqe: pointer to newly DMA'ed CQE entry for processing
1641 *
1642 * process iSCSI NOPIN local completion CQE, frees IIT and command structures
1643 */
1644 static void bnx2i_process_nopin_local_cmpl(struct iscsi_session *session,
1645 struct bnx2i_conn *bnx2i_conn,
1646 struct cqe *cqe)
1647 {
1648 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1649 struct bnx2i_nop_in_msg *nop_in;
1650 struct iscsi_task *task;
1651
1652 nop_in = (struct bnx2i_nop_in_msg *)cqe;
1653 spin_lock(&session->lock);
1654 task = iscsi_itt_to_task(conn,
1655 nop_in->itt & ISCSI_NOP_IN_MSG_INDEX);
1656 if (task)
1657 __iscsi_put_task(task);
1658 spin_unlock(&session->lock);
1659 }
1660
1661 /**
1662 * bnx2i_unsol_pdu_adjust_rq - makes adjustments to RQ after unsol pdu is recvd
1663 * @conn: iscsi connection
1664 *
1665 * Firmware advances RQ producer index for every unsolicited PDU even if
1666 * payload data length is '0'. This function makes corresponding
1667 * adjustments on the driver side to match this f/w behavior
1668 */
1669 static void bnx2i_unsol_pdu_adjust_rq(struct bnx2i_conn *bnx2i_conn)
1670 {
1671 char dummy_rq_data[2];
1672 bnx2i_get_rq_buf(bnx2i_conn, dummy_rq_data, 1);
1673 bnx2i_put_rq_buf(bnx2i_conn, 1);
1674 }
1675
1676
1677 /**
1678 * bnx2i_process_nopin_mesg - this function handles iscsi nopin CQE
1679 * @session: iscsi session pointer
1680 * @bnx2i_conn: iscsi connection pointer
1681 * @cqe: pointer to newly DMA'ed CQE entry for processing
1682 *
1683 * process iSCSI target's proactive iSCSI NOPIN request
1684 */
1685 static int bnx2i_process_nopin_mesg(struct iscsi_session *session,
1686 struct bnx2i_conn *bnx2i_conn,
1687 struct cqe *cqe)
1688 {
1689 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1690 struct iscsi_task *task;
1691 struct bnx2i_nop_in_msg *nop_in;
1692 struct iscsi_nopin *hdr;
1693 int tgt_async_nop = 0;
1694
1695 nop_in = (struct bnx2i_nop_in_msg *)cqe;
1696
1697 spin_lock(&session->lock);
1698 hdr = (struct iscsi_nopin *)&bnx2i_conn->gen_pdu.resp_hdr;
1699 memset(hdr, 0, sizeof(struct iscsi_hdr));
1700 hdr->opcode = nop_in->op_code;
1701 hdr->max_cmdsn = cpu_to_be32(nop_in->max_cmd_sn);
1702 hdr->exp_cmdsn = cpu_to_be32(nop_in->exp_cmd_sn);
1703 hdr->ttt = cpu_to_be32(nop_in->ttt);
1704
1705 if (nop_in->itt == (u16) RESERVED_ITT) {
1706 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
1707 hdr->itt = RESERVED_ITT;
1708 tgt_async_nop = 1;
1709 goto done;
1710 }
1711
1712 /* this is a response to one of our nop-outs */
1713 task = iscsi_itt_to_task(conn,
1714 (itt_t) (nop_in->itt & ISCSI_NOP_IN_MSG_INDEX));
1715 if (task) {
1716 hdr->flags = ISCSI_FLAG_CMD_FINAL;
1717 hdr->itt = task->hdr->itt;
1718 hdr->ttt = cpu_to_be32(nop_in->ttt);
1719 memcpy(&hdr->lun, nop_in->lun, 8);
1720 }
1721 done:
1722 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, NULL, 0);
1723 spin_unlock(&session->lock);
1724
1725 return tgt_async_nop;
1726 }
1727
1728
1729 /**
1730 * bnx2i_process_async_mesg - this function handles iscsi async message
1731 * @session: iscsi session pointer
1732 * @bnx2i_conn: iscsi connection pointer
1733 * @cqe: pointer to newly DMA'ed CQE entry for processing
1734 *
1735 * process iSCSI ASYNC Message
1736 */
1737 static void bnx2i_process_async_mesg(struct iscsi_session *session,
1738 struct bnx2i_conn *bnx2i_conn,
1739 struct cqe *cqe)
1740 {
1741 struct bnx2i_async_msg *async_cqe;
1742 struct iscsi_async *resp_hdr;
1743 u8 async_event;
1744
1745 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
1746
1747 async_cqe = (struct bnx2i_async_msg *)cqe;
1748 async_event = async_cqe->async_event;
1749
1750 if (async_event == ISCSI_ASYNC_MSG_SCSI_EVENT) {
1751 iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data,
1752 "async: scsi events not supported\n");
1753 return;
1754 }
1755
1756 spin_lock(&session->lock);
1757 resp_hdr = (struct iscsi_async *) &bnx2i_conn->gen_pdu.resp_hdr;
1758 memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1759 resp_hdr->opcode = async_cqe->op_code;
1760 resp_hdr->flags = 0x80;
1761
1762 memcpy(&resp_hdr->lun, async_cqe->lun, 8);
1763 resp_hdr->exp_cmdsn = cpu_to_be32(async_cqe->exp_cmd_sn);
1764 resp_hdr->max_cmdsn = cpu_to_be32(async_cqe->max_cmd_sn);
1765
1766 resp_hdr->async_event = async_cqe->async_event;
1767 resp_hdr->async_vcode = async_cqe->async_vcode;
1768
1769 resp_hdr->param1 = cpu_to_be16(async_cqe->param1);
1770 resp_hdr->param2 = cpu_to_be16(async_cqe->param2);
1771 resp_hdr->param3 = cpu_to_be16(async_cqe->param3);
1772
1773 __iscsi_complete_pdu(bnx2i_conn->cls_conn->dd_data,
1774 (struct iscsi_hdr *)resp_hdr, NULL, 0);
1775 spin_unlock(&session->lock);
1776 }
1777
1778
1779 /**
1780 * bnx2i_process_reject_mesg - process iscsi reject pdu
1781 * @session: iscsi session pointer
1782 * @bnx2i_conn: iscsi connection pointer
1783 * @cqe: pointer to newly DMA'ed CQE entry for processing
1784 *
1785 * process iSCSI REJECT message
1786 */
1787 static void bnx2i_process_reject_mesg(struct iscsi_session *session,
1788 struct bnx2i_conn *bnx2i_conn,
1789 struct cqe *cqe)
1790 {
1791 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1792 struct bnx2i_reject_msg *reject;
1793 struct iscsi_reject *hdr;
1794
1795 reject = (struct bnx2i_reject_msg *) cqe;
1796 if (reject->data_length) {
1797 bnx2i_get_rq_buf(bnx2i_conn, conn->data, reject->data_length);
1798 bnx2i_put_rq_buf(bnx2i_conn, 1);
1799 } else
1800 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
1801
1802 spin_lock(&session->lock);
1803 hdr = (struct iscsi_reject *) &bnx2i_conn->gen_pdu.resp_hdr;
1804 memset(hdr, 0, sizeof(struct iscsi_hdr));
1805 hdr->opcode = reject->op_code;
1806 hdr->reason = reject->reason;
1807 hton24(hdr->dlength, reject->data_length);
1808 hdr->max_cmdsn = cpu_to_be32(reject->max_cmd_sn);
1809 hdr->exp_cmdsn = cpu_to_be32(reject->exp_cmd_sn);
1810 hdr->ffffffff = cpu_to_be32(RESERVED_ITT);
1811 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, conn->data,
1812 reject->data_length);
1813 spin_unlock(&session->lock);
1814 }
1815
1816 /**
1817 * bnx2i_process_cmd_cleanup_resp - process scsi command clean-up completion
1818 * @session: iscsi session pointer
1819 * @bnx2i_conn: iscsi connection pointer
1820 * @cqe: pointer to newly DMA'ed CQE entry for processing
1821 *
1822 * process command cleanup response CQE during conn shutdown or error recovery
1823 */
1824 static void bnx2i_process_cmd_cleanup_resp(struct iscsi_session *session,
1825 struct bnx2i_conn *bnx2i_conn,
1826 struct cqe *cqe)
1827 {
1828 struct bnx2i_cleanup_response *cmd_clean_rsp;
1829 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1830 struct iscsi_task *task;
1831
1832 cmd_clean_rsp = (struct bnx2i_cleanup_response *)cqe;
1833 spin_lock(&session->lock);
1834 task = iscsi_itt_to_task(conn,
1835 cmd_clean_rsp->itt & ISCSI_CLEANUP_RESPONSE_INDEX);
1836 if (!task)
1837 printk(KERN_ALERT "bnx2i: cmd clean ITT %x not active\n",
1838 cmd_clean_rsp->itt & ISCSI_CLEANUP_RESPONSE_INDEX);
1839 spin_unlock(&session->lock);
1840 complete(&bnx2i_conn->cmd_cleanup_cmpl);
1841 }
1842
1843
1844 /**
1845 * bnx2i_percpu_io_thread - thread per cpu for ios
1846 *
1847 * @arg: ptr to bnx2i_percpu_info structure
1848 */
1849 int bnx2i_percpu_io_thread(void *arg)
1850 {
1851 struct bnx2i_percpu_s *p = arg;
1852 struct bnx2i_work *work, *tmp;
1853 LIST_HEAD(work_list);
1854
1855 set_user_nice(current, -20);
1856
1857 while (!kthread_should_stop()) {
1858 spin_lock_bh(&p->p_work_lock);
1859 while (!list_empty(&p->work_list)) {
1860 list_splice_init(&p->work_list, &work_list);
1861 spin_unlock_bh(&p->p_work_lock);
1862
1863 list_for_each_entry_safe(work, tmp, &work_list, list) {
1864 list_del_init(&work->list);
1865 /* work allocated in the bh, freed here */
1866 bnx2i_process_scsi_cmd_resp(work->session,
1867 work->bnx2i_conn,
1868 &work->cqe);
1869 atomic_dec(&work->bnx2i_conn->work_cnt);
1870 kfree(work);
1871 }
1872 spin_lock_bh(&p->p_work_lock);
1873 }
1874 set_current_state(TASK_INTERRUPTIBLE);
1875 spin_unlock_bh(&p->p_work_lock);
1876 schedule();
1877 }
1878 __set_current_state(TASK_RUNNING);
1879
1880 return 0;
1881 }
1882
1883
1884 /**
1885 * bnx2i_queue_scsi_cmd_resp - queue cmd completion to the percpu thread
1886 * @bnx2i_conn: bnx2i connection
1887 *
1888 * this function is called by generic KCQ handler to queue all pending cmd
1889 * completion CQEs
1890 *
1891 * The implementation is to queue the cmd response based on the
1892 * last recorded command for the given connection. The
1893 * cpu_id gets recorded upon task_xmit. No out-of-order completion!
1894 */
1895 static int bnx2i_queue_scsi_cmd_resp(struct iscsi_session *session,
1896 struct bnx2i_conn *bnx2i_conn,
1897 struct bnx2i_nop_in_msg *cqe)
1898 {
1899 struct bnx2i_work *bnx2i_work = NULL;
1900 struct bnx2i_percpu_s *p = NULL;
1901 struct iscsi_task *task;
1902 struct scsi_cmnd *sc;
1903 int rc = 0;
1904 int cpu;
1905
1906 spin_lock(&session->lock);
1907 task = iscsi_itt_to_task(bnx2i_conn->cls_conn->dd_data,
1908 cqe->itt & ISCSI_CMD_RESPONSE_INDEX);
1909 if (!task) {
1910 spin_unlock(&session->lock);
1911 return -EINVAL;
1912 }
1913 sc = task->sc;
1914 spin_unlock(&session->lock);
1915
1916 if (!blk_rq_cpu_valid(sc->request))
1917 cpu = smp_processor_id();
1918 else
1919 cpu = sc->request->cpu;
1920
1921 p = &per_cpu(bnx2i_percpu, cpu);
1922 spin_lock(&p->p_work_lock);
1923 if (unlikely(!p->iothread)) {
1924 rc = -EINVAL;
1925 goto err;
1926 }
1927 /* Alloc and copy to the cqe */
1928 bnx2i_work = kzalloc(sizeof(struct bnx2i_work), GFP_ATOMIC);
1929 if (bnx2i_work) {
1930 INIT_LIST_HEAD(&bnx2i_work->list);
1931 bnx2i_work->session = session;
1932 bnx2i_work->bnx2i_conn = bnx2i_conn;
1933 memcpy(&bnx2i_work->cqe, cqe, sizeof(struct cqe));
1934 list_add_tail(&bnx2i_work->list, &p->work_list);
1935 atomic_inc(&bnx2i_conn->work_cnt);
1936 wake_up_process(p->iothread);
1937 spin_unlock(&p->p_work_lock);
1938 goto done;
1939 } else
1940 rc = -ENOMEM;
1941 err:
1942 spin_unlock(&p->p_work_lock);
1943 bnx2i_process_scsi_cmd_resp(session, bnx2i_conn, (struct cqe *)cqe);
1944 done:
1945 return rc;
1946 }
1947
1948
1949 /**
1950 * bnx2i_process_new_cqes - process newly DMA'ed CQE's
1951 * @bnx2i_conn: bnx2i connection
1952 *
1953 * this function is called by generic KCQ handler to process all pending CQE's
1954 */
1955 static int bnx2i_process_new_cqes(struct bnx2i_conn *bnx2i_conn)
1956 {
1957 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1958 struct iscsi_session *session = conn->session;
1959 struct qp_info *qp;
1960 struct bnx2i_nop_in_msg *nopin;
1961 int tgt_async_msg;
1962 int cqe_cnt = 0;
1963
1964 if (bnx2i_conn->ep == NULL)
1965 return 0;
1966
1967 qp = &bnx2i_conn->ep->qp;
1968
1969 if (!qp->cq_virt) {
1970 printk(KERN_ALERT "bnx2i (%s): cq resr freed in bh execution!",
1971 bnx2i_conn->hba->netdev->name);
1972 goto out;
1973 }
1974 while (1) {
1975 nopin = (struct bnx2i_nop_in_msg *) qp->cq_cons_qe;
1976 if (nopin->cq_req_sn != qp->cqe_exp_seq_sn)
1977 break;
1978
1979 if (unlikely(test_bit(ISCSI_SUSPEND_BIT, &conn->suspend_rx))) {
1980 if (nopin->op_code == ISCSI_OP_NOOP_IN &&
1981 nopin->itt == (u16) RESERVED_ITT) {
1982 printk(KERN_ALERT "bnx2i: Unsolicited "
1983 "NOP-In detected for suspended "
1984 "connection dev=%s!\n",
1985 bnx2i_conn->hba->netdev->name);
1986 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
1987 goto cqe_out;
1988 }
1989 break;
1990 }
1991 tgt_async_msg = 0;
1992
1993 switch (nopin->op_code) {
1994 case ISCSI_OP_SCSI_CMD_RSP:
1995 case ISCSI_OP_SCSI_DATA_IN:
1996 /* Run the kthread engine only for data cmds
1997 All other cmds will be completed in this bh! */
1998 bnx2i_queue_scsi_cmd_resp(session, bnx2i_conn, nopin);
1999 break;
2000 case ISCSI_OP_LOGIN_RSP:
2001 bnx2i_process_login_resp(session, bnx2i_conn,
2002 qp->cq_cons_qe);
2003 break;
2004 case ISCSI_OP_SCSI_TMFUNC_RSP:
2005 bnx2i_process_tmf_resp(session, bnx2i_conn,
2006 qp->cq_cons_qe);
2007 break;
2008 case ISCSI_OP_TEXT_RSP:
2009 bnx2i_process_text_resp(session, bnx2i_conn,
2010 qp->cq_cons_qe);
2011 break;
2012 case ISCSI_OP_LOGOUT_RSP:
2013 bnx2i_process_logout_resp(session, bnx2i_conn,
2014 qp->cq_cons_qe);
2015 break;
2016 case ISCSI_OP_NOOP_IN:
2017 if (bnx2i_process_nopin_mesg(session, bnx2i_conn,
2018 qp->cq_cons_qe))
2019 tgt_async_msg = 1;
2020 break;
2021 case ISCSI_OPCODE_NOPOUT_LOCAL_COMPLETION:
2022 bnx2i_process_nopin_local_cmpl(session, bnx2i_conn,
2023 qp->cq_cons_qe);
2024 break;
2025 case ISCSI_OP_ASYNC_EVENT:
2026 bnx2i_process_async_mesg(session, bnx2i_conn,
2027 qp->cq_cons_qe);
2028 tgt_async_msg = 1;
2029 break;
2030 case ISCSI_OP_REJECT:
2031 bnx2i_process_reject_mesg(session, bnx2i_conn,
2032 qp->cq_cons_qe);
2033 break;
2034 case ISCSI_OPCODE_CLEANUP_RESPONSE:
2035 bnx2i_process_cmd_cleanup_resp(session, bnx2i_conn,
2036 qp->cq_cons_qe);
2037 break;
2038 default:
2039 printk(KERN_ALERT "bnx2i: unknown opcode 0x%x\n",
2040 nopin->op_code);
2041 }
2042 if (!tgt_async_msg) {
2043 if (!atomic_read(&bnx2i_conn->ep->num_active_cmds))
2044 printk(KERN_ALERT "bnx2i (%s): no active cmd! "
2045 "op 0x%x\n",
2046 bnx2i_conn->hba->netdev->name,
2047 nopin->op_code);
2048 else
2049 atomic_dec(&bnx2i_conn->ep->num_active_cmds);
2050 }
2051 cqe_out:
2052 /* clear out in production version only, till beta keep opcode
2053 * field intact, will be helpful in debugging (context dump)
2054 * nopin->op_code = 0;
2055 */
2056 cqe_cnt++;
2057 qp->cqe_exp_seq_sn++;
2058 if (qp->cqe_exp_seq_sn == (qp->cqe_size * 2 + 1))
2059 qp->cqe_exp_seq_sn = ISCSI_INITIAL_SN;
2060
2061 if (qp->cq_cons_qe == qp->cq_last_qe) {
2062 qp->cq_cons_qe = qp->cq_first_qe;
2063 qp->cq_cons_idx = 0;
2064 } else {
2065 qp->cq_cons_qe++;
2066 qp->cq_cons_idx++;
2067 }
2068 }
2069 out:
2070 return cqe_cnt;
2071 }
2072
2073 /**
2074 * bnx2i_fastpath_notification - process global event queue (KCQ)
2075 * @hba: adapter structure pointer
2076 * @new_cqe_kcqe: pointer to newly DMA'ed KCQE entry
2077 *
2078 * Fast path event notification handler, KCQ entry carries context id
2079 * of the connection that has 1 or more pending CQ entries
2080 */
2081 static void bnx2i_fastpath_notification(struct bnx2i_hba *hba,
2082 struct iscsi_kcqe *new_cqe_kcqe)
2083 {
2084 struct bnx2i_conn *bnx2i_conn;
2085 u32 iscsi_cid;
2086 int nxt_idx;
2087
2088 iscsi_cid = new_cqe_kcqe->iscsi_conn_id;
2089 bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
2090
2091 if (!bnx2i_conn) {
2092 printk(KERN_ALERT "cid #%x not valid\n", iscsi_cid);
2093 return;
2094 }
2095 if (!bnx2i_conn->ep) {
2096 printk(KERN_ALERT "cid #%x - ep not bound\n", iscsi_cid);
2097 return;
2098 }
2099
2100 bnx2i_process_new_cqes(bnx2i_conn);
2101 nxt_idx = bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep,
2102 CNIC_ARM_CQE_FP);
2103 if (nxt_idx && nxt_idx == bnx2i_process_new_cqes(bnx2i_conn))
2104 bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep, CNIC_ARM_CQE_FP);
2105 }
2106
2107
2108 /**
2109 * bnx2i_process_update_conn_cmpl - process iscsi conn update completion KCQE
2110 * @hba: adapter structure pointer
2111 * @update_kcqe: kcqe pointer
2112 *
2113 * CONN_UPDATE completion handler, this completes iSCSI connection FFP migration
2114 */
2115 static void bnx2i_process_update_conn_cmpl(struct bnx2i_hba *hba,
2116 struct iscsi_kcqe *update_kcqe)
2117 {
2118 struct bnx2i_conn *conn;
2119 u32 iscsi_cid;
2120
2121 iscsi_cid = update_kcqe->iscsi_conn_id;
2122 conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
2123
2124 if (!conn) {
2125 printk(KERN_ALERT "conn_update: cid %x not valid\n", iscsi_cid);
2126 return;
2127 }
2128 if (!conn->ep) {
2129 printk(KERN_ALERT "cid %x does not have ep bound\n", iscsi_cid);
2130 return;
2131 }
2132
2133 if (update_kcqe->completion_status) {
2134 printk(KERN_ALERT "request failed cid %x\n", iscsi_cid);
2135 conn->ep->state = EP_STATE_ULP_UPDATE_FAILED;
2136 } else
2137 conn->ep->state = EP_STATE_ULP_UPDATE_COMPL;
2138
2139 wake_up_interruptible(&conn->ep->ofld_wait);
2140 }
2141
2142
2143 /**
2144 * bnx2i_recovery_que_add_conn - add connection to recovery queue
2145 * @hba: adapter structure pointer
2146 * @bnx2i_conn: iscsi connection
2147 *
2148 * Add connection to recovery queue and schedule adapter eh worker
2149 */
2150 static void bnx2i_recovery_que_add_conn(struct bnx2i_hba *hba,
2151 struct bnx2i_conn *bnx2i_conn)
2152 {
2153 iscsi_conn_failure(bnx2i_conn->cls_conn->dd_data,
2154 ISCSI_ERR_CONN_FAILED);
2155 }
2156
2157
2158 /**
2159 * bnx2i_process_tcp_error - process error notification on a given connection
2160 *
2161 * @hba: adapter structure pointer
2162 * @tcp_err: tcp error kcqe pointer
2163 *
2164 * handles tcp level error notifications from FW.
2165 */
2166 static void bnx2i_process_tcp_error(struct bnx2i_hba *hba,
2167 struct iscsi_kcqe *tcp_err)
2168 {
2169 struct bnx2i_conn *bnx2i_conn;
2170 u32 iscsi_cid;
2171
2172 iscsi_cid = tcp_err->iscsi_conn_id;
2173 bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
2174
2175 if (!bnx2i_conn) {
2176 printk(KERN_ALERT "bnx2i - cid 0x%x not valid\n", iscsi_cid);
2177 return;
2178 }
2179
2180 printk(KERN_ALERT "bnx2i - cid 0x%x had TCP errors, error code 0x%x\n",
2181 iscsi_cid, tcp_err->completion_status);
2182 bnx2i_recovery_que_add_conn(bnx2i_conn->hba, bnx2i_conn);
2183 }
2184
2185
2186 /**
2187 * bnx2i_process_iscsi_error - process error notification on a given connection
2188 * @hba: adapter structure pointer
2189 * @iscsi_err: iscsi error kcqe pointer
2190 *
2191 * handles iscsi error notifications from the FW. Firmware based in initial
2192 * handshake classifies iscsi protocol / TCP rfc violation into either
2193 * warning or error indications. If indication is of "Error" type, driver
2194 * will initiate session recovery for that connection/session. For
2195 * "Warning" type indication, driver will put out a system log message
2196 * (there will be only one message for each type for the life of the
2197 * session, this is to avoid un-necessarily overloading the system)
2198 */
2199 static void bnx2i_process_iscsi_error(struct bnx2i_hba *hba,
2200 struct iscsi_kcqe *iscsi_err)
2201 {
2202 struct bnx2i_conn *bnx2i_conn;
2203 u32 iscsi_cid;
2204 char warn_notice[] = "iscsi_warning";
2205 char error_notice[] = "iscsi_error";
2206 char additional_notice[64];
2207 char *message;
2208 int need_recovery;
2209 u64 err_mask64;
2210
2211 iscsi_cid = iscsi_err->iscsi_conn_id;
2212 bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
2213 if (!bnx2i_conn) {
2214 printk(KERN_ALERT "bnx2i - cid 0x%x not valid\n", iscsi_cid);
2215 return;
2216 }
2217
2218 err_mask64 = (0x1ULL << iscsi_err->completion_status);
2219
2220 if (err_mask64 & iscsi_error_mask) {
2221 need_recovery = 0;
2222 message = warn_notice;
2223 } else {
2224 need_recovery = 1;
2225 message = error_notice;
2226 }
2227
2228 switch (iscsi_err->completion_status) {
2229 case ISCSI_KCQE_COMPLETION_STATUS_HDR_DIG_ERR:
2230 strcpy(additional_notice, "hdr digest err");
2231 break;
2232 case ISCSI_KCQE_COMPLETION_STATUS_DATA_DIG_ERR:
2233 strcpy(additional_notice, "data digest err");
2234 break;
2235 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_OPCODE:
2236 strcpy(additional_notice, "wrong opcode rcvd");
2237 break;
2238 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_AHS_LEN:
2239 strcpy(additional_notice, "AHS len > 0 rcvd");
2240 break;
2241 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_ITT:
2242 strcpy(additional_notice, "invalid ITT rcvd");
2243 break;
2244 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_STATSN:
2245 strcpy(additional_notice, "wrong StatSN rcvd");
2246 break;
2247 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_EXP_DATASN:
2248 strcpy(additional_notice, "wrong DataSN rcvd");
2249 break;
2250 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T:
2251 strcpy(additional_notice, "pend R2T violation");
2252 break;
2253 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_0:
2254 strcpy(additional_notice, "ERL0, UO");
2255 break;
2256 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_1:
2257 strcpy(additional_notice, "ERL0, U1");
2258 break;
2259 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_2:
2260 strcpy(additional_notice, "ERL0, U2");
2261 break;
2262 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_3:
2263 strcpy(additional_notice, "ERL0, U3");
2264 break;
2265 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_4:
2266 strcpy(additional_notice, "ERL0, U4");
2267 break;
2268 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_5:
2269 strcpy(additional_notice, "ERL0, U5");
2270 break;
2271 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_6:
2272 strcpy(additional_notice, "ERL0, U6");
2273 break;
2274 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REMAIN_RCV_LEN:
2275 strcpy(additional_notice, "invalid resi len");
2276 break;
2277 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_MAX_RCV_PDU_LEN:
2278 strcpy(additional_notice, "MRDSL violation");
2279 break;
2280 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_F_BIT_ZERO:
2281 strcpy(additional_notice, "F-bit not set");
2282 break;
2283 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_NOT_RSRV:
2284 strcpy(additional_notice, "invalid TTT");
2285 break;
2286 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DATASN:
2287 strcpy(additional_notice, "invalid DataSN");
2288 break;
2289 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REMAIN_BURST_LEN:
2290 strcpy(additional_notice, "burst len violation");
2291 break;
2292 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_BUFFER_OFF:
2293 strcpy(additional_notice, "buf offset violation");
2294 break;
2295 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_LUN:
2296 strcpy(additional_notice, "invalid LUN field");
2297 break;
2298 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_R2TSN:
2299 strcpy(additional_notice, "invalid R2TSN field");
2300 break;
2301 #define BNX2I_ERR_DESIRED_DATA_TRNS_LEN_0 \
2302 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_0
2303 case BNX2I_ERR_DESIRED_DATA_TRNS_LEN_0:
2304 strcpy(additional_notice, "invalid cmd len1");
2305 break;
2306 #define BNX2I_ERR_DESIRED_DATA_TRNS_LEN_1 \
2307 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_1
2308 case BNX2I_ERR_DESIRED_DATA_TRNS_LEN_1:
2309 strcpy(additional_notice, "invalid cmd len2");
2310 break;
2311 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T_EXCEED:
2312 strcpy(additional_notice,
2313 "pend r2t exceeds MaxOutstandingR2T value");
2314 break;
2315 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_IS_RSRV:
2316 strcpy(additional_notice, "TTT is rsvd");
2317 break;
2318 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_MAX_BURST_LEN:
2319 strcpy(additional_notice, "MBL violation");
2320 break;
2321 #define BNX2I_ERR_DATA_SEG_LEN_NOT_ZERO \
2322 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DATA_SEG_LEN_NOT_ZERO
2323 case BNX2I_ERR_DATA_SEG_LEN_NOT_ZERO:
2324 strcpy(additional_notice, "data seg len != 0");
2325 break;
2326 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REJECT_PDU_LEN:
2327 strcpy(additional_notice, "reject pdu len error");
2328 break;
2329 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_ASYNC_PDU_LEN:
2330 strcpy(additional_notice, "async pdu len error");
2331 break;
2332 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_NOPIN_PDU_LEN:
2333 strcpy(additional_notice, "nopin pdu len error");
2334 break;
2335 #define BNX2_ERR_PEND_R2T_IN_CLEANUP \
2336 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T_IN_CLEANUP
2337 case BNX2_ERR_PEND_R2T_IN_CLEANUP:
2338 strcpy(additional_notice, "pend r2t in cleanup");
2339 break;
2340
2341 case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_IP_FRAGMENT:
2342 strcpy(additional_notice, "IP fragments rcvd");
2343 break;
2344 case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_IP_OPTIONS:
2345 strcpy(additional_notice, "IP options error");
2346 break;
2347 case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_URGENT_FLAG:
2348 strcpy(additional_notice, "urgent flag error");
2349 break;
2350 default:
2351 printk(KERN_ALERT "iscsi_err - unknown err %x\n",
2352 iscsi_err->completion_status);
2353 }
2354
2355 if (need_recovery) {
2356 iscsi_conn_printk(KERN_ALERT,
2357 bnx2i_conn->cls_conn->dd_data,
2358 "bnx2i: %s - %s\n",
2359 message, additional_notice);
2360
2361 iscsi_conn_printk(KERN_ALERT,
2362 bnx2i_conn->cls_conn->dd_data,
2363 "conn_err - hostno %d conn %p, "
2364 "iscsi_cid %x cid %x\n",
2365 bnx2i_conn->hba->shost->host_no,
2366 bnx2i_conn, bnx2i_conn->ep->ep_iscsi_cid,
2367 bnx2i_conn->ep->ep_cid);
2368 bnx2i_recovery_que_add_conn(bnx2i_conn->hba, bnx2i_conn);
2369 } else
2370 if (!test_and_set_bit(iscsi_err->completion_status,
2371 (void *) &bnx2i_conn->violation_notified))
2372 iscsi_conn_printk(KERN_ALERT,
2373 bnx2i_conn->cls_conn->dd_data,
2374 "bnx2i: %s - %s\n",
2375 message, additional_notice);
2376 }
2377
2378
2379 /**
2380 * bnx2i_process_conn_destroy_cmpl - process iscsi conn destroy completion
2381 * @hba: adapter structure pointer
2382 * @conn_destroy: conn destroy kcqe pointer
2383 *
2384 * handles connection destroy completion request.
2385 */
2386 static void bnx2i_process_conn_destroy_cmpl(struct bnx2i_hba *hba,
2387 struct iscsi_kcqe *conn_destroy)
2388 {
2389 struct bnx2i_endpoint *ep;
2390
2391 ep = bnx2i_find_ep_in_destroy_list(hba, conn_destroy->iscsi_conn_id);
2392 if (!ep) {
2393 printk(KERN_ALERT "bnx2i_conn_destroy_cmpl: no pending "
2394 "offload request, unexpected complection\n");
2395 return;
2396 }
2397
2398 if (hba != ep->hba) {
2399 printk(KERN_ALERT "conn destroy- error hba mis-match\n");
2400 return;
2401 }
2402
2403 if (conn_destroy->completion_status) {
2404 printk(KERN_ALERT "conn_destroy_cmpl: op failed\n");
2405 ep->state = EP_STATE_CLEANUP_FAILED;
2406 } else
2407 ep->state = EP_STATE_CLEANUP_CMPL;
2408 wake_up_interruptible(&ep->ofld_wait);
2409 }
2410
2411
2412 /**
2413 * bnx2i_process_ofld_cmpl - process initial iscsi conn offload completion
2414 * @hba: adapter structure pointer
2415 * @ofld_kcqe: conn offload kcqe pointer
2416 *
2417 * handles initial connection offload completion, ep_connect() thread is
2418 * woken-up to continue with LLP connect process
2419 */
2420 static void bnx2i_process_ofld_cmpl(struct bnx2i_hba *hba,
2421 struct iscsi_kcqe *ofld_kcqe)
2422 {
2423 u32 cid_addr;
2424 struct bnx2i_endpoint *ep;
2425 u32 cid_num;
2426
2427 ep = bnx2i_find_ep_in_ofld_list(hba, ofld_kcqe->iscsi_conn_id);
2428 if (!ep) {
2429 printk(KERN_ALERT "ofld_cmpl: no pend offload request\n");
2430 return;
2431 }
2432
2433 if (hba != ep->hba) {
2434 printk(KERN_ALERT "ofld_cmpl: error hba mis-match\n");
2435 return;
2436 }
2437
2438 if (ofld_kcqe->completion_status) {
2439 ep->state = EP_STATE_OFLD_FAILED;
2440 if (ofld_kcqe->completion_status ==
2441 ISCSI_KCQE_COMPLETION_STATUS_CTX_ALLOC_FAILURE)
2442 printk(KERN_ALERT "bnx2i (%s): ofld1 cmpl - unable "
2443 "to allocate iSCSI context resources\n",
2444 hba->netdev->name);
2445 else if (ofld_kcqe->completion_status ==
2446 ISCSI_KCQE_COMPLETION_STATUS_INVALID_OPCODE)
2447 printk(KERN_ALERT "bnx2i (%s): ofld1 cmpl - invalid "
2448 "opcode\n", hba->netdev->name);
2449 else if (ofld_kcqe->completion_status ==
2450 ISCSI_KCQE_COMPLETION_STATUS_CID_BUSY)
2451 /* error status code valid only for 5771x chipset */
2452 ep->state = EP_STATE_OFLD_FAILED_CID_BUSY;
2453 else
2454 printk(KERN_ALERT "bnx2i (%s): ofld1 cmpl - invalid "
2455 "error code %d\n", hba->netdev->name,
2456 ofld_kcqe->completion_status);
2457 } else {
2458 ep->state = EP_STATE_OFLD_COMPL;
2459 cid_addr = ofld_kcqe->iscsi_conn_context_id;
2460 cid_num = bnx2i_get_cid_num(ep);
2461 ep->ep_cid = cid_addr;
2462 ep->qp.ctx_base = NULL;
2463 }
2464 wake_up_interruptible(&ep->ofld_wait);
2465 }
2466
2467 /**
2468 * bnx2i_indicate_kcqe - process iscsi conn update completion KCQE
2469 * @hba: adapter structure pointer
2470 * @update_kcqe: kcqe pointer
2471 *
2472 * Generic KCQ event handler/dispatcher
2473 */
2474 static void bnx2i_indicate_kcqe(void *context, struct kcqe *kcqe[],
2475 u32 num_cqe)
2476 {
2477 struct bnx2i_hba *hba = context;
2478 int i = 0;
2479 struct iscsi_kcqe *ikcqe = NULL;
2480
2481 while (i < num_cqe) {
2482 ikcqe = (struct iscsi_kcqe *) kcqe[i++];
2483
2484 if (ikcqe->op_code ==
2485 ISCSI_KCQE_OPCODE_CQ_EVENT_NOTIFICATION)
2486 bnx2i_fastpath_notification(hba, ikcqe);
2487 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_OFFLOAD_CONN)
2488 bnx2i_process_ofld_cmpl(hba, ikcqe);
2489 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_UPDATE_CONN)
2490 bnx2i_process_update_conn_cmpl(hba, ikcqe);
2491 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_INIT) {
2492 if (ikcqe->completion_status !=
2493 ISCSI_KCQE_COMPLETION_STATUS_SUCCESS)
2494 bnx2i_iscsi_license_error(hba, ikcqe->\
2495 completion_status);
2496 else {
2497 set_bit(ADAPTER_STATE_UP, &hba->adapter_state);
2498 bnx2i_get_link_state(hba);
2499 printk(KERN_INFO "bnx2i [%.2x:%.2x.%.2x]: "
2500 "ISCSI_INIT passed\n",
2501 (u8)hba->pcidev->bus->number,
2502 hba->pci_devno,
2503 (u8)hba->pci_func);
2504
2505
2506 }
2507 } else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_DESTROY_CONN)
2508 bnx2i_process_conn_destroy_cmpl(hba, ikcqe);
2509 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_ISCSI_ERROR)
2510 bnx2i_process_iscsi_error(hba, ikcqe);
2511 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_TCP_ERROR)
2512 bnx2i_process_tcp_error(hba, ikcqe);
2513 else
2514 printk(KERN_ALERT "bnx2i: unknown opcode 0x%x\n",
2515 ikcqe->op_code);
2516 }
2517 }
2518
2519
2520 /**
2521 * bnx2i_indicate_netevent - Generic netdev event handler
2522 * @context: adapter structure pointer
2523 * @event: event type
2524 * @vlan_id: vlans id - associated vlan id with this event
2525 *
2526 * Handles four netdev events, NETDEV_UP, NETDEV_DOWN,
2527 * NETDEV_GOING_DOWN and NETDEV_CHANGE
2528 */
2529 static void bnx2i_indicate_netevent(void *context, unsigned long event,
2530 u16 vlan_id)
2531 {
2532 struct bnx2i_hba *hba = context;
2533
2534 /* Ignore all netevent coming from vlans */
2535 if (vlan_id != 0)
2536 return;
2537
2538 switch (event) {
2539 case NETDEV_UP:
2540 if (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state))
2541 bnx2i_send_fw_iscsi_init_msg(hba);
2542 break;
2543 case NETDEV_DOWN:
2544 clear_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state);
2545 clear_bit(ADAPTER_STATE_UP, &hba->adapter_state);
2546 break;
2547 case NETDEV_GOING_DOWN:
2548 set_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state);
2549 iscsi_host_for_each_session(hba->shost,
2550 bnx2i_drop_session);
2551 break;
2552 case NETDEV_CHANGE:
2553 bnx2i_get_link_state(hba);
2554 break;
2555 default:
2556 ;
2557 }
2558 }
2559
2560
2561 /**
2562 * bnx2i_cm_connect_cmpl - process iscsi conn establishment completion
2563 * @cm_sk: cnic sock structure pointer
2564 *
2565 * function callback exported via bnx2i - cnic driver interface to
2566 * indicate completion of option-2 TCP connect request.
2567 */
2568 static void bnx2i_cm_connect_cmpl(struct cnic_sock *cm_sk)
2569 {
2570 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2571
2572 if (test_bit(ADAPTER_STATE_GOING_DOWN, &ep->hba->adapter_state))
2573 ep->state = EP_STATE_CONNECT_FAILED;
2574 else if (test_bit(SK_F_OFFLD_COMPLETE, &cm_sk->flags))
2575 ep->state = EP_STATE_CONNECT_COMPL;
2576 else
2577 ep->state = EP_STATE_CONNECT_FAILED;
2578
2579 wake_up_interruptible(&ep->ofld_wait);
2580 }
2581
2582
2583 /**
2584 * bnx2i_cm_close_cmpl - process tcp conn close completion
2585 * @cm_sk: cnic sock structure pointer
2586 *
2587 * function callback exported via bnx2i - cnic driver interface to
2588 * indicate completion of option-2 graceful TCP connect shutdown
2589 */
2590 static void bnx2i_cm_close_cmpl(struct cnic_sock *cm_sk)
2591 {
2592 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2593
2594 ep->state = EP_STATE_DISCONN_COMPL;
2595 wake_up_interruptible(&ep->ofld_wait);
2596 }
2597
2598
2599 /**
2600 * bnx2i_cm_abort_cmpl - process abortive tcp conn teardown completion
2601 * @cm_sk: cnic sock structure pointer
2602 *
2603 * function callback exported via bnx2i - cnic driver interface to
2604 * indicate completion of option-2 abortive TCP connect termination
2605 */
2606 static void bnx2i_cm_abort_cmpl(struct cnic_sock *cm_sk)
2607 {
2608 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2609
2610 ep->state = EP_STATE_DISCONN_COMPL;
2611 wake_up_interruptible(&ep->ofld_wait);
2612 }
2613
2614
2615 /**
2616 * bnx2i_cm_remote_close - process received TCP FIN
2617 * @hba: adapter structure pointer
2618 * @update_kcqe: kcqe pointer
2619 *
2620 * function callback exported via bnx2i - cnic driver interface to indicate
2621 * async TCP events such as FIN
2622 */
2623 static void bnx2i_cm_remote_close(struct cnic_sock *cm_sk)
2624 {
2625 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2626
2627 ep->state = EP_STATE_TCP_FIN_RCVD;
2628 if (ep->conn)
2629 bnx2i_recovery_que_add_conn(ep->hba, ep->conn);
2630 }
2631
2632 /**
2633 * bnx2i_cm_remote_abort - process TCP RST and start conn cleanup
2634 * @hba: adapter structure pointer
2635 * @update_kcqe: kcqe pointer
2636 *
2637 * function callback exported via bnx2i - cnic driver interface to
2638 * indicate async TCP events (RST) sent by the peer.
2639 */
2640 static void bnx2i_cm_remote_abort(struct cnic_sock *cm_sk)
2641 {
2642 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2643 u32 old_state = ep->state;
2644
2645 ep->state = EP_STATE_TCP_RST_RCVD;
2646 if (old_state == EP_STATE_DISCONN_START)
2647 wake_up_interruptible(&ep->ofld_wait);
2648 else
2649 if (ep->conn)
2650 bnx2i_recovery_que_add_conn(ep->hba, ep->conn);
2651 }
2652
2653
2654 static int bnx2i_send_nl_mesg(void *context, u32 msg_type,
2655 char *buf, u16 buflen)
2656 {
2657 struct bnx2i_hba *hba = context;
2658 int rc;
2659
2660 if (!hba)
2661 return -ENODEV;
2662
2663 rc = iscsi_offload_mesg(hba->shost, &bnx2i_iscsi_transport,
2664 msg_type, buf, buflen);
2665 if (rc)
2666 printk(KERN_ALERT "bnx2i: private nl message send error\n");
2667
2668 return rc;
2669 }
2670
2671
2672 /**
2673 * bnx2i_cnic_cb - global template of bnx2i - cnic driver interface structure
2674 * carrying callback function pointers
2675 *
2676 */
2677 struct cnic_ulp_ops bnx2i_cnic_cb = {
2678 .cnic_init = bnx2i_ulp_init,
2679 .cnic_exit = bnx2i_ulp_exit,
2680 .cnic_start = bnx2i_start,
2681 .cnic_stop = bnx2i_stop,
2682 .indicate_kcqes = bnx2i_indicate_kcqe,
2683 .indicate_netevent = bnx2i_indicate_netevent,
2684 .cm_connect_complete = bnx2i_cm_connect_cmpl,
2685 .cm_close_complete = bnx2i_cm_close_cmpl,
2686 .cm_abort_complete = bnx2i_cm_abort_cmpl,
2687 .cm_remote_close = bnx2i_cm_remote_close,
2688 .cm_remote_abort = bnx2i_cm_remote_abort,
2689 .iscsi_nl_send_msg = bnx2i_send_nl_mesg,
2690 .owner = THIS_MODULE
2691 };
2692
2693
2694 /**
2695 * bnx2i_map_ep_dbell_regs - map connection doorbell registers
2696 * @ep: bnx2i endpoint
2697 *
2698 * maps connection's SQ and RQ doorbell registers, 5706/5708/5709 hosts these
2699 * register in BAR #0. Whereas in 57710 these register are accessed by
2700 * mapping BAR #1
2701 */
2702 int bnx2i_map_ep_dbell_regs(struct bnx2i_endpoint *ep)
2703 {
2704 u32 cid_num;
2705 u32 reg_off;
2706 u32 first_l4l5;
2707 u32 ctx_sz;
2708 u32 config2;
2709 resource_size_t reg_base;
2710
2711 cid_num = bnx2i_get_cid_num(ep);
2712
2713 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
2714 reg_base = pci_resource_start(ep->hba->pcidev,
2715 BNX2X_DOORBELL_PCI_BAR);
2716 reg_off = BNX2I_5771X_DBELL_PAGE_SIZE * (cid_num & 0x1FFFF) +
2717 DPM_TRIGER_TYPE;
2718 ep->qp.ctx_base = ioremap_nocache(reg_base + reg_off, 4);
2719 goto arm_cq;
2720 }
2721
2722 reg_base = ep->hba->netdev->base_addr;
2723 if ((test_bit(BNX2I_NX2_DEV_5709, &ep->hba->cnic_dev_type)) &&
2724 (ep->hba->mail_queue_access == BNX2I_MQ_BIN_MODE)) {
2725 config2 = REG_RD(ep->hba, BNX2_MQ_CONFIG2);
2726 first_l4l5 = config2 & BNX2_MQ_CONFIG2_FIRST_L4L5;
2727 ctx_sz = (config2 & BNX2_MQ_CONFIG2_CONT_SZ) >> 3;
2728 if (ctx_sz)
2729 reg_off = CTX_OFFSET + MAX_CID_CNT * MB_KERNEL_CTX_SIZE
2730 + BNX2I_570X_PAGE_SIZE_DEFAULT *
2731 (((cid_num - first_l4l5) / ctx_sz) + 256);
2732 else
2733 reg_off = CTX_OFFSET + (MB_KERNEL_CTX_SIZE * cid_num);
2734 } else
2735 /* 5709 device in normal node and 5706/5708 devices */
2736 reg_off = CTX_OFFSET + (MB_KERNEL_CTX_SIZE * cid_num);
2737
2738 ep->qp.ctx_base = ioremap_nocache(reg_base + reg_off,
2739 MB_KERNEL_CTX_SIZE);
2740 if (!ep->qp.ctx_base)
2741 return -ENOMEM;
2742
2743 arm_cq:
2744 bnx2i_arm_cq_event_coalescing(ep, CNIC_ARM_CQE);
2745 return 0;
2746 }