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Linux 2.6.34-rc3
[pohmelfs.git] / drivers / scsi / bnx2i / bnx2i_hwi.c
blob1af578dec276da2b2254cf85451d9c4c235503f0
1 /* bnx2i_hwi.c: Broadcom NetXtreme II iSCSI driver.
2 *
3 * Copyright (c) 2006 - 2009 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 */
13
14 #include <scsi/scsi_tcq.h>
15 #include <scsi/libiscsi.h>
16 #include "bnx2i.h"
17
18 /**
19 * bnx2i_get_cid_num - get cid from ep
20 * @ep: endpoint pointer
21 *
22 * Only applicable to 57710 family of devices
23 */
24 static u32 bnx2i_get_cid_num(struct bnx2i_endpoint *ep)
25 {
26 u32 cid;
27
28 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
29 cid = ep->ep_cid;
30 else
31 cid = GET_CID_NUM(ep->ep_cid);
32 return cid;
33 }
34
35
36 /**
37 * bnx2i_adjust_qp_size - Adjust SQ/RQ/CQ size for 57710 device type
38 * @hba: Adapter for which adjustments is to be made
39 *
40 * Only applicable to 57710 family of devices
41 */
42 static void bnx2i_adjust_qp_size(struct bnx2i_hba *hba)
43 {
44 u32 num_elements_per_pg;
45
46 if (test_bit(BNX2I_NX2_DEV_5706, &hba->cnic_dev_type) ||
47 test_bit(BNX2I_NX2_DEV_5708, &hba->cnic_dev_type) ||
48 test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type)) {
49 if (!is_power_of_2(hba->max_sqes))
50 hba->max_sqes = rounddown_pow_of_two(hba->max_sqes);
51
52 if (!is_power_of_2(hba->max_rqes))
53 hba->max_rqes = rounddown_pow_of_two(hba->max_rqes);
54 }
55
56 /* Adjust each queue size if the user selection does not
57 * yield integral num of page buffers
58 */
59 /* adjust SQ */
60 num_elements_per_pg = PAGE_SIZE / BNX2I_SQ_WQE_SIZE;
61 if (hba->max_sqes < num_elements_per_pg)
62 hba->max_sqes = num_elements_per_pg;
63 else if (hba->max_sqes % num_elements_per_pg)
64 hba->max_sqes = (hba->max_sqes + num_elements_per_pg - 1) &
65 ~(num_elements_per_pg - 1);
66
67 /* adjust CQ */
68 num_elements_per_pg = PAGE_SIZE / BNX2I_CQE_SIZE;
69 if (hba->max_cqes < num_elements_per_pg)
70 hba->max_cqes = num_elements_per_pg;
71 else if (hba->max_cqes % num_elements_per_pg)
72 hba->max_cqes = (hba->max_cqes + num_elements_per_pg - 1) &
73 ~(num_elements_per_pg - 1);
74
75 /* adjust RQ */
76 num_elements_per_pg = PAGE_SIZE / BNX2I_RQ_WQE_SIZE;
77 if (hba->max_rqes < num_elements_per_pg)
78 hba->max_rqes = num_elements_per_pg;
79 else if (hba->max_rqes % num_elements_per_pg)
80 hba->max_rqes = (hba->max_rqes + num_elements_per_pg - 1) &
81 ~(num_elements_per_pg - 1);
82 }
83
84
85 /**
86 * bnx2i_get_link_state - get network interface link state
87 * @hba: adapter instance pointer
88 *
89 * updates adapter structure flag based on netdev state
90 */
91 static void bnx2i_get_link_state(struct bnx2i_hba *hba)
92 {
93 if (test_bit(__LINK_STATE_NOCARRIER, &hba->netdev->state))
94 set_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state);
95 else
96 clear_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state);
97 }
98
99
100 /**
101 * bnx2i_iscsi_license_error - displays iscsi license related error message
102 * @hba: adapter instance pointer
103 * @error_code: error classification
104 *
105 * Puts out an error log when driver is unable to offload iscsi connection
106 * due to license restrictions
107 */
108 static void bnx2i_iscsi_license_error(struct bnx2i_hba *hba, u32 error_code)
109 {
110 if (error_code == ISCSI_KCQE_COMPLETION_STATUS_ISCSI_NOT_SUPPORTED)
111 /* iSCSI offload not supported on this device */
112 printk(KERN_ERR "bnx2i: iSCSI not supported, dev=%s\n",
113 hba->netdev->name);
114 if (error_code == ISCSI_KCQE_COMPLETION_STATUS_LOM_ISCSI_NOT_ENABLED)
115 /* iSCSI offload not supported on this LOM device */
116 printk(KERN_ERR "bnx2i: LOM is not enable to "
117 "offload iSCSI connections, dev=%s\n",
118 hba->netdev->name);
119 set_bit(ADAPTER_STATE_INIT_FAILED, &hba->adapter_state);
120 }
121
122
123 /**
124 * bnx2i_arm_cq_event_coalescing - arms CQ to enable EQ notification
125 * @ep: endpoint (transport indentifier) structure
126 * @action: action, ARM or DISARM. For now only ARM_CQE is used
127 *
128 * Arm'ing CQ will enable chip to generate global EQ events inorder to interrupt
129 * the driver. EQ event is generated CQ index is hit or at least 1 CQ is
130 * outstanding and on chip timer expires
131 */
132 void bnx2i_arm_cq_event_coalescing(struct bnx2i_endpoint *ep, u8 action)
133 {
134 struct bnx2i_5771x_cq_db *cq_db;
135 u16 cq_index;
136 u16 next_index;
137 u32 num_active_cmds;
138
139
140 /* Coalesce CQ entries only on 10G devices */
141 if (!test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
142 return;
143
144 /* Do not update CQ DB multiple times before firmware writes
145 * '0xFFFF' to CQDB->SQN field. Deviation may cause spurious
146 * interrupts and other unwanted results
147 */
148 cq_db = (struct bnx2i_5771x_cq_db *) ep->qp.cq_pgtbl_virt;
149 if (cq_db->sqn[0] && cq_db->sqn[0] != 0xFFFF)
150 return;
151
152 if (action == CNIC_ARM_CQE) {
153 num_active_cmds = ep->num_active_cmds;
154 if (num_active_cmds <= event_coal_min)
155 next_index = 1;
156 else
157 next_index = event_coal_min +
158 (num_active_cmds - event_coal_min) / event_coal_div;
159 if (!next_index)
160 next_index = 1;
161 cq_index = ep->qp.cqe_exp_seq_sn + next_index - 1;
162 if (cq_index > ep->qp.cqe_size * 2)
163 cq_index -= ep->qp.cqe_size * 2;
164 if (!cq_index)
165 cq_index = 1;
166
167 cq_db->sqn[0] = cq_index;
168 }
169 }
170
171
172 /**
173 * bnx2i_get_rq_buf - copy RQ buffer contents to driver buffer
174 * @conn: iscsi connection on which RQ event occured
175 * @ptr: driver buffer to which RQ buffer contents is to
176 * be copied
177 * @len: length of valid data inside RQ buf
178 *
179 * Copies RQ buffer contents from shared (DMA'able) memory region to
180 * driver buffer. RQ is used to DMA unsolicitated iscsi pdu's and
181 * scsi sense info
182 */
183 void bnx2i_get_rq_buf(struct bnx2i_conn *bnx2i_conn, char *ptr, int len)
184 {
185 if (!bnx2i_conn->ep->qp.rqe_left)
186 return;
187
188 bnx2i_conn->ep->qp.rqe_left--;
189 memcpy(ptr, (u8 *) bnx2i_conn->ep->qp.rq_cons_qe, len);
190 if (bnx2i_conn->ep->qp.rq_cons_qe == bnx2i_conn->ep->qp.rq_last_qe) {
191 bnx2i_conn->ep->qp.rq_cons_qe = bnx2i_conn->ep->qp.rq_first_qe;
192 bnx2i_conn->ep->qp.rq_cons_idx = 0;
193 } else {
194 bnx2i_conn->ep->qp.rq_cons_qe++;
195 bnx2i_conn->ep->qp.rq_cons_idx++;
196 }
197 }
198
199
200 static void bnx2i_ring_577xx_doorbell(struct bnx2i_conn *conn)
201 {
202 struct bnx2i_5771x_dbell dbell;
203 u32 msg;
204
205 memset(&dbell, 0, sizeof(dbell));
206 dbell.dbell.header = (B577XX_ISCSI_CONNECTION_TYPE <<
207 B577XX_DOORBELL_HDR_CONN_TYPE_SHIFT);
208 msg = *((u32 *)&dbell);
209 /* TODO : get doorbell register mapping */
210 writel(cpu_to_le32(msg), conn->ep->qp.ctx_base);
211 }
212
213
214 /**
215 * bnx2i_put_rq_buf - Replenish RQ buffer, if required ring on chip doorbell
216 * @conn: iscsi connection on which event to post
217 * @count: number of RQ buffer being posted to chip
218 *
219 * No need to ring hardware doorbell for 57710 family of devices
220 */
221 void bnx2i_put_rq_buf(struct bnx2i_conn *bnx2i_conn, int count)
222 {
223 struct bnx2i_5771x_sq_rq_db *rq_db;
224 u16 hi_bit = (bnx2i_conn->ep->qp.rq_prod_idx & 0x8000);
225 struct bnx2i_endpoint *ep = bnx2i_conn->ep;
226
227 ep->qp.rqe_left += count;
228 ep->qp.rq_prod_idx &= 0x7FFF;
229 ep->qp.rq_prod_idx += count;
230
231 if (ep->qp.rq_prod_idx > bnx2i_conn->hba->max_rqes) {
232 ep->qp.rq_prod_idx %= bnx2i_conn->hba->max_rqes;
233 if (!hi_bit)
234 ep->qp.rq_prod_idx |= 0x8000;
235 } else
236 ep->qp.rq_prod_idx |= hi_bit;
237
238 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
239 rq_db = (struct bnx2i_5771x_sq_rq_db *) ep->qp.rq_pgtbl_virt;
240 rq_db->prod_idx = ep->qp.rq_prod_idx;
241 /* no need to ring hardware doorbell for 57710 */
242 } else {
243 writew(ep->qp.rq_prod_idx,
244 ep->qp.ctx_base + CNIC_RECV_DOORBELL);
245 }
246 mmiowb();
247 }
248
249
250 /**
251 * bnx2i_ring_sq_dbell - Ring SQ doorbell to wake-up the processing engine
252 * @conn: iscsi connection to which new SQ entries belong
253 * @count: number of SQ WQEs to post
254 *
255 * SQ DB is updated in host memory and TX Doorbell is rung for 57710 family
256 * of devices. For 5706/5708/5709 new SQ WQE count is written into the
257 * doorbell register
258 */
259 static void bnx2i_ring_sq_dbell(struct bnx2i_conn *bnx2i_conn, int count)
260 {
261 struct bnx2i_5771x_sq_rq_db *sq_db;
262 struct bnx2i_endpoint *ep = bnx2i_conn->ep;
263
264 ep->num_active_cmds++;
265 wmb(); /* flush SQ WQE memory before the doorbell is rung */
266 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
267 sq_db = (struct bnx2i_5771x_sq_rq_db *) ep->qp.sq_pgtbl_virt;
268 sq_db->prod_idx = ep->qp.sq_prod_idx;
269 bnx2i_ring_577xx_doorbell(bnx2i_conn);
270 } else
271 writew(count, ep->qp.ctx_base + CNIC_SEND_DOORBELL);
272
273 mmiowb(); /* flush posted PCI writes */
274 }
275
276
277 /**
278 * bnx2i_ring_dbell_update_sq_params - update SQ driver parameters
279 * @conn: iscsi connection to which new SQ entries belong
280 * @count: number of SQ WQEs to post
281 *
282 * this routine will update SQ driver parameters and ring the doorbell
283 */
284 static void bnx2i_ring_dbell_update_sq_params(struct bnx2i_conn *bnx2i_conn,
285 int count)
286 {
287 int tmp_cnt;
288
289 if (count == 1) {
290 if (bnx2i_conn->ep->qp.sq_prod_qe ==
291 bnx2i_conn->ep->qp.sq_last_qe)
292 bnx2i_conn->ep->qp.sq_prod_qe =
293 bnx2i_conn->ep->qp.sq_first_qe;
294 else
295 bnx2i_conn->ep->qp.sq_prod_qe++;
296 } else {
297 if ((bnx2i_conn->ep->qp.sq_prod_qe + count) <=
298 bnx2i_conn->ep->qp.sq_last_qe)
299 bnx2i_conn->ep->qp.sq_prod_qe += count;
300 else {
301 tmp_cnt = bnx2i_conn->ep->qp.sq_last_qe -
302 bnx2i_conn->ep->qp.sq_prod_qe;
303 bnx2i_conn->ep->qp.sq_prod_qe =
304 &bnx2i_conn->ep->qp.sq_first_qe[count -
305 (tmp_cnt + 1)];
306 }
307 }
308 bnx2i_conn->ep->qp.sq_prod_idx += count;
309 /* Ring the doorbell */
310 bnx2i_ring_sq_dbell(bnx2i_conn, bnx2i_conn->ep->qp.sq_prod_idx);
311 }
312
313
314 /**
315 * bnx2i_send_iscsi_login - post iSCSI login request MP WQE to hardware
316 * @conn: iscsi connection
317 * @cmd: driver command structure which is requesting
318 * a WQE to sent to chip for further processing
319 *
320 * prepare and post an iSCSI Login request WQE to CNIC firmware
321 */
322 int bnx2i_send_iscsi_login(struct bnx2i_conn *bnx2i_conn,
323 struct iscsi_task *task)
324 {
325 struct bnx2i_cmd *bnx2i_cmd;
326 struct bnx2i_login_request *login_wqe;
327 struct iscsi_login *login_hdr;
328 u32 dword;
329
330 bnx2i_cmd = (struct bnx2i_cmd *)task->dd_data;
331 login_hdr = (struct iscsi_login *)task->hdr;
332 login_wqe = (struct bnx2i_login_request *)
333 bnx2i_conn->ep->qp.sq_prod_qe;
334
335 login_wqe->op_code = login_hdr->opcode;
336 login_wqe->op_attr = login_hdr->flags;
337 login_wqe->version_max = login_hdr->max_version;
338 login_wqe->version_min = login_hdr->min_version;
339 login_wqe->data_length = ntoh24(login_hdr->dlength);
340 login_wqe->isid_lo = *((u32 *) login_hdr->isid);
341 login_wqe->isid_hi = *((u16 *) login_hdr->isid + 2);
342 login_wqe->tsih = login_hdr->tsih;
343 login_wqe->itt = task->itt |
344 (ISCSI_TASK_TYPE_MPATH << ISCSI_LOGIN_REQUEST_TYPE_SHIFT);
345 login_wqe->cid = login_hdr->cid;
346
347 login_wqe->cmd_sn = be32_to_cpu(login_hdr->cmdsn);
348 login_wqe->exp_stat_sn = be32_to_cpu(login_hdr->exp_statsn);
349
350 login_wqe->resp_bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_bd_dma;
351 login_wqe->resp_bd_list_addr_hi =
352 (u32) ((u64) bnx2i_conn->gen_pdu.resp_bd_dma >> 32);
353
354 dword = ((1 << ISCSI_LOGIN_REQUEST_NUM_RESP_BDS_SHIFT) |
355 (bnx2i_conn->gen_pdu.resp_buf_size <<
356 ISCSI_LOGIN_REQUEST_RESP_BUFFER_LENGTH_SHIFT));
357 login_wqe->resp_buffer = dword;
358 login_wqe->flags = 0;
359 login_wqe->bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.req_bd_dma;
360 login_wqe->bd_list_addr_hi =
361 (u32) ((u64) bnx2i_conn->gen_pdu.req_bd_dma >> 32);
362 login_wqe->num_bds = 1;
363 login_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
364
365 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
366 return 0;
367 }
368
369 /**
370 * bnx2i_send_iscsi_tmf - post iSCSI task management request MP WQE to hardware
371 * @conn: iscsi connection
372 * @mtask: driver command structure which is requesting
373 * a WQE to sent to chip for further processing
374 *
375 * prepare and post an iSCSI Login request WQE to CNIC firmware
376 */
377 int bnx2i_send_iscsi_tmf(struct bnx2i_conn *bnx2i_conn,
378 struct iscsi_task *mtask)
379 {
380 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
381 struct iscsi_tm *tmfabort_hdr;
382 struct scsi_cmnd *ref_sc;
383 struct iscsi_task *ctask;
384 struct bnx2i_cmd *bnx2i_cmd;
385 struct bnx2i_tmf_request *tmfabort_wqe;
386 u32 dword;
387 u32 scsi_lun[2];
388
389 bnx2i_cmd = (struct bnx2i_cmd *)mtask->dd_data;
390 tmfabort_hdr = (struct iscsi_tm *)mtask->hdr;
391 tmfabort_wqe = (struct bnx2i_tmf_request *)
392 bnx2i_conn->ep->qp.sq_prod_qe;
393
394 tmfabort_wqe->op_code = tmfabort_hdr->opcode;
395 tmfabort_wqe->op_attr = 0;
396 tmfabort_wqe->op_attr =
397 ISCSI_TMF_REQUEST_ALWAYS_ONE | ISCSI_TM_FUNC_ABORT_TASK;
398
399 tmfabort_wqe->itt = (mtask->itt | (ISCSI_TASK_TYPE_MPATH << 14));
400 tmfabort_wqe->reserved2 = 0;
401 tmfabort_wqe->cmd_sn = be32_to_cpu(tmfabort_hdr->cmdsn);
402
403 ctask = iscsi_itt_to_task(conn, tmfabort_hdr->rtt);
404 if (!ctask || !ctask->sc)
405 /*
406 * the iscsi layer must have completed the cmd while this
407 * was starting up.
408 *
409 * Note: In the case of a SCSI cmd timeout, the task's sc
410 * is still active; hence ctask->sc != 0
411 * In this case, the task must be aborted
412 */
413 return 0;
414
415 ref_sc = ctask->sc;
416
417 /* Retrieve LUN directly from the ref_sc */
418 int_to_scsilun(ref_sc->device->lun, (struct scsi_lun *) scsi_lun);
419 tmfabort_wqe->lun[0] = be32_to_cpu(scsi_lun[0]);
420 tmfabort_wqe->lun[1] = be32_to_cpu(scsi_lun[1]);
421
422 if (ref_sc->sc_data_direction == DMA_TO_DEVICE)
423 dword = (ISCSI_TASK_TYPE_WRITE << ISCSI_CMD_REQUEST_TYPE_SHIFT);
424 else
425 dword = (ISCSI_TASK_TYPE_READ << ISCSI_CMD_REQUEST_TYPE_SHIFT);
426 tmfabort_wqe->ref_itt = (dword | (tmfabort_hdr->rtt & ISCSI_ITT_MASK));
427 tmfabort_wqe->ref_cmd_sn = be32_to_cpu(tmfabort_hdr->refcmdsn);
428
429 tmfabort_wqe->bd_list_addr_lo = (u32) bnx2i_conn->hba->mp_bd_dma;
430 tmfabort_wqe->bd_list_addr_hi = (u32)
431 ((u64) bnx2i_conn->hba->mp_bd_dma >> 32);
432 tmfabort_wqe->num_bds = 1;
433 tmfabort_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
434
435 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
436 return 0;
437 }
438
439 /**
440 * bnx2i_send_iscsi_scsicmd - post iSCSI scsicmd request WQE to hardware
441 * @conn: iscsi connection
442 * @cmd: driver command structure which is requesting
443 * a WQE to sent to chip for further processing
444 *
445 * prepare and post an iSCSI SCSI-CMD request WQE to CNIC firmware
446 */
447 int bnx2i_send_iscsi_scsicmd(struct bnx2i_conn *bnx2i_conn,
448 struct bnx2i_cmd *cmd)
449 {
450 struct bnx2i_cmd_request *scsi_cmd_wqe;
451
452 scsi_cmd_wqe = (struct bnx2i_cmd_request *)
453 bnx2i_conn->ep->qp.sq_prod_qe;
454 memcpy(scsi_cmd_wqe, &cmd->req, sizeof(struct bnx2i_cmd_request));
455 scsi_cmd_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
456
457 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
458 return 0;
459 }
460
461 /**
462 * bnx2i_send_iscsi_nopout - post iSCSI NOPOUT request WQE to hardware
463 * @conn: iscsi connection
464 * @cmd: driver command structure which is requesting
465 * a WQE to sent to chip for further processing
466 * @ttt: TTT to be used when building pdu header
467 * @datap: payload buffer pointer
468 * @data_len: payload data length
469 * @unsol: indicated whether nopout pdu is unsolicited pdu or
470 * in response to target's NOPIN w/ TTT != FFFFFFFF
471 *
472 * prepare and post a nopout request WQE to CNIC firmware
473 */
474 int bnx2i_send_iscsi_nopout(struct bnx2i_conn *bnx2i_conn,
475 struct iscsi_task *task, u32 ttt,
476 char *datap, int data_len, int unsol)
477 {
478 struct bnx2i_endpoint *ep = bnx2i_conn->ep;
479 struct bnx2i_cmd *bnx2i_cmd;
480 struct bnx2i_nop_out_request *nopout_wqe;
481 struct iscsi_nopout *nopout_hdr;
482
483 bnx2i_cmd = (struct bnx2i_cmd *)task->dd_data;
484 nopout_hdr = (struct iscsi_nopout *)task->hdr;
485 nopout_wqe = (struct bnx2i_nop_out_request *)ep->qp.sq_prod_qe;
486 nopout_wqe->op_code = nopout_hdr->opcode;
487 nopout_wqe->op_attr = ISCSI_FLAG_CMD_FINAL;
488 memcpy(nopout_wqe->lun, nopout_hdr->lun, 8);
489
490 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
491 u32 tmp = nopout_hdr->lun[0];
492 /* 57710 requires LUN field to be swapped */
493 nopout_hdr->lun[0] = nopout_hdr->lun[1];
494 nopout_hdr->lun[1] = tmp;
495 }
496
497 nopout_wqe->itt = ((u16)task->itt |
498 (ISCSI_TASK_TYPE_MPATH <<
499 ISCSI_TMF_REQUEST_TYPE_SHIFT));
500 nopout_wqe->ttt = ttt;
501 nopout_wqe->flags = 0;
502 if (!unsol)
503 nopout_wqe->flags = ISCSI_NOP_OUT_REQUEST_LOCAL_COMPLETION;
504 else if (nopout_hdr->itt == RESERVED_ITT)
505 nopout_wqe->flags = ISCSI_NOP_OUT_REQUEST_LOCAL_COMPLETION;
506
507 nopout_wqe->cmd_sn = be32_to_cpu(nopout_hdr->cmdsn);
508 nopout_wqe->data_length = data_len;
509 if (data_len) {
510 /* handle payload data, not required in first release */
511 printk(KERN_ALERT "NOPOUT: WARNING!! payload len != 0\n");
512 } else {
513 nopout_wqe->bd_list_addr_lo = (u32)
514 bnx2i_conn->hba->mp_bd_dma;
515 nopout_wqe->bd_list_addr_hi =
516 (u32) ((u64) bnx2i_conn->hba->mp_bd_dma >> 32);
517 nopout_wqe->num_bds = 1;
518 }
519 nopout_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 /**
527 * bnx2i_send_iscsi_logout - post iSCSI logout request WQE to hardware
528 * @conn: iscsi connection
529 * @cmd: driver command structure which is requesting
530 * a WQE to sent to chip for further processing
531 *
532 * prepare and post logout request WQE to CNIC firmware
533 */
534 int bnx2i_send_iscsi_logout(struct bnx2i_conn *bnx2i_conn,
535 struct iscsi_task *task)
536 {
537 struct bnx2i_cmd *bnx2i_cmd;
538 struct bnx2i_logout_request *logout_wqe;
539 struct iscsi_logout *logout_hdr;
540
541 bnx2i_cmd = (struct bnx2i_cmd *)task->dd_data;
542 logout_hdr = (struct iscsi_logout *)task->hdr;
543
544 logout_wqe = (struct bnx2i_logout_request *)
545 bnx2i_conn->ep->qp.sq_prod_qe;
546 memset(logout_wqe, 0x00, sizeof(struct bnx2i_logout_request));
547
548 logout_wqe->op_code = logout_hdr->opcode;
549 logout_wqe->cmd_sn = be32_to_cpu(logout_hdr->cmdsn);
550 logout_wqe->op_attr =
551 logout_hdr->flags | ISCSI_LOGOUT_REQUEST_ALWAYS_ONE;
552 logout_wqe->itt = ((u16)task->itt |
553 (ISCSI_TASK_TYPE_MPATH <<
554 ISCSI_LOGOUT_REQUEST_TYPE_SHIFT));
555 logout_wqe->data_length = 0;
556 logout_wqe->cid = 0;
557
558 logout_wqe->bd_list_addr_lo = (u32) bnx2i_conn->hba->mp_bd_dma;
559 logout_wqe->bd_list_addr_hi = (u32)
560 ((u64) bnx2i_conn->hba->mp_bd_dma >> 32);
561 logout_wqe->num_bds = 1;
562 logout_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
563
564 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
565 return 0;
566 }
567
568
569 /**
570 * bnx2i_update_iscsi_conn - post iSCSI logout request WQE to hardware
571 * @conn: iscsi connection which requires iscsi parameter update
572 *
573 * sends down iSCSI Conn Update request to move iSCSI conn to FFP
574 */
575 void bnx2i_update_iscsi_conn(struct iscsi_conn *conn)
576 {
577 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
578 struct bnx2i_hba *hba = bnx2i_conn->hba;
579 struct kwqe *kwqe_arr[2];
580 struct iscsi_kwqe_conn_update *update_wqe;
581 struct iscsi_kwqe_conn_update conn_update_kwqe;
582
583 update_wqe = &conn_update_kwqe;
584
585 update_wqe->hdr.op_code = ISCSI_KWQE_OPCODE_UPDATE_CONN;
586 update_wqe->hdr.flags =
587 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
588
589 /* 5771x requires conn context id to be passed as is */
590 if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_conn->ep->hba->cnic_dev_type))
591 update_wqe->context_id = bnx2i_conn->ep->ep_cid;
592 else
593 update_wqe->context_id = (bnx2i_conn->ep->ep_cid >> 7);
594 update_wqe->conn_flags = 0;
595 if (conn->hdrdgst_en)
596 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_HEADER_DIGEST;
597 if (conn->datadgst_en)
598 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_DATA_DIGEST;
599 if (conn->session->initial_r2t_en)
600 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_INITIAL_R2T;
601 if (conn->session->imm_data_en)
602 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_IMMEDIATE_DATA;
603
604 update_wqe->max_send_pdu_length = conn->max_xmit_dlength;
605 update_wqe->max_recv_pdu_length = conn->max_recv_dlength;
606 update_wqe->first_burst_length = conn->session->first_burst;
607 update_wqe->max_burst_length = conn->session->max_burst;
608 update_wqe->exp_stat_sn = conn->exp_statsn;
609 update_wqe->max_outstanding_r2ts = conn->session->max_r2t;
610 update_wqe->session_error_recovery_level = conn->session->erl;
611 iscsi_conn_printk(KERN_ALERT, conn,
612 "bnx2i: conn update - MBL 0x%x FBL 0x%x"
613 "MRDSL_I 0x%x MRDSL_T 0x%x \n",
614 update_wqe->max_burst_length,
615 update_wqe->first_burst_length,
616 update_wqe->max_recv_pdu_length,
617 update_wqe->max_send_pdu_length);
618
619 kwqe_arr[0] = (struct kwqe *) update_wqe;
620 if (hba->cnic && hba->cnic->submit_kwqes)
621 hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 1);
622 }
623
624
625 /**
626 * bnx2i_ep_ofld_timer - post iSCSI logout request WQE to hardware
627 * @data: endpoint (transport handle) structure pointer
628 *
629 * routine to handle connection offload/destroy request timeout
630 */
631 void bnx2i_ep_ofld_timer(unsigned long data)
632 {
633 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) data;
634
635 if (ep->state == EP_STATE_OFLD_START) {
636 printk(KERN_ALERT "ofld_timer: CONN_OFLD timeout\n");
637 ep->state = EP_STATE_OFLD_FAILED;
638 } else if (ep->state == EP_STATE_DISCONN_START) {
639 printk(KERN_ALERT "ofld_timer: CONN_DISCON timeout\n");
640 ep->state = EP_STATE_DISCONN_TIMEDOUT;
641 } else if (ep->state == EP_STATE_CLEANUP_START) {
642 printk(KERN_ALERT "ofld_timer: CONN_CLEANUP timeout\n");
643 ep->state = EP_STATE_CLEANUP_FAILED;
644 }
645
646 wake_up_interruptible(&ep->ofld_wait);
647 }
648
649
650 static int bnx2i_power_of2(u32 val)
651 {
652 u32 power = 0;
653 if (val & (val - 1))
654 return power;
655 val--;
656 while (val) {
657 val = val >> 1;
658 power++;
659 }
660 return power;
661 }
662
663
664 /**
665 * bnx2i_send_cmd_cleanup_req - send iscsi cmd context clean-up request
666 * @hba: adapter structure pointer
667 * @cmd: driver command structure which is requesting
668 * a WQE to sent to chip for further processing
669 *
670 * prepares and posts CONN_OFLD_REQ1/2 KWQE
671 */
672 void bnx2i_send_cmd_cleanup_req(struct bnx2i_hba *hba, struct bnx2i_cmd *cmd)
673 {
674 struct bnx2i_cleanup_request *cmd_cleanup;
675
676 cmd_cleanup =
677 (struct bnx2i_cleanup_request *)cmd->conn->ep->qp.sq_prod_qe;
678 memset(cmd_cleanup, 0x00, sizeof(struct bnx2i_cleanup_request));
679
680 cmd_cleanup->op_code = ISCSI_OPCODE_CLEANUP_REQUEST;
681 cmd_cleanup->itt = cmd->req.itt;
682 cmd_cleanup->cq_index = 0; /* CQ# used for completion, 5771x only */
683
684 bnx2i_ring_dbell_update_sq_params(cmd->conn, 1);
685 }
686
687
688 /**
689 * bnx2i_send_conn_destroy - initiates iscsi connection teardown process
690 * @hba: adapter structure pointer
691 * @ep: endpoint (transport indentifier) structure
692 *
693 * this routine prepares and posts CONN_OFLD_REQ1/2 KWQE to initiate
694 * iscsi connection context clean-up process
695 */
696 void bnx2i_send_conn_destroy(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
697 {
698 struct kwqe *kwqe_arr[2];
699 struct iscsi_kwqe_conn_destroy conn_cleanup;
700
701 memset(&conn_cleanup, 0x00, sizeof(struct iscsi_kwqe_conn_destroy));
702
703 conn_cleanup.hdr.op_code = ISCSI_KWQE_OPCODE_DESTROY_CONN;
704 conn_cleanup.hdr.flags =
705 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
706 /* 5771x requires conn context id to be passed as is */
707 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
708 conn_cleanup.context_id = ep->ep_cid;
709 else
710 conn_cleanup.context_id = (ep->ep_cid >> 7);
711
712 conn_cleanup.reserved0 = (u16)ep->ep_iscsi_cid;
713
714 kwqe_arr[0] = (struct kwqe *) &conn_cleanup;
715 if (hba->cnic && hba->cnic->submit_kwqes)
716 hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 1);
717 }
718
719
720 /**
721 * bnx2i_570x_send_conn_ofld_req - initiates iscsi conn context setup process
722 * @hba: adapter structure pointer
723 * @ep: endpoint (transport indentifier) structure
724 *
725 * 5706/5708/5709 specific - prepares and posts CONN_OFLD_REQ1/2 KWQE
726 */
727 static void bnx2i_570x_send_conn_ofld_req(struct bnx2i_hba *hba,
728 struct bnx2i_endpoint *ep)
729 {
730 struct kwqe *kwqe_arr[2];
731 struct iscsi_kwqe_conn_offload1 ofld_req1;
732 struct iscsi_kwqe_conn_offload2 ofld_req2;
733 dma_addr_t dma_addr;
734 int num_kwqes = 2;
735 u32 *ptbl;
736
737 ofld_req1.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN1;
738 ofld_req1.hdr.flags =
739 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
740
741 ofld_req1.iscsi_conn_id = (u16) ep->ep_iscsi_cid;
742
743 dma_addr = ep->qp.sq_pgtbl_phys;
744 ofld_req1.sq_page_table_addr_lo = (u32) dma_addr;
745 ofld_req1.sq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
746
747 dma_addr = ep->qp.cq_pgtbl_phys;
748 ofld_req1.cq_page_table_addr_lo = (u32) dma_addr;
749 ofld_req1.cq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
750
751 ofld_req2.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN2;
752 ofld_req2.hdr.flags =
753 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
754
755 dma_addr = ep->qp.rq_pgtbl_phys;
756 ofld_req2.rq_page_table_addr_lo = (u32) dma_addr;
757 ofld_req2.rq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
758
759 ptbl = (u32 *) ep->qp.sq_pgtbl_virt;
760
761 ofld_req2.sq_first_pte.hi = *ptbl++;
762 ofld_req2.sq_first_pte.lo = *ptbl;
763
764 ptbl = (u32 *) ep->qp.cq_pgtbl_virt;
765 ofld_req2.cq_first_pte.hi = *ptbl++;
766 ofld_req2.cq_first_pte.lo = *ptbl;
767
768 kwqe_arr[0] = (struct kwqe *) &ofld_req1;
769 kwqe_arr[1] = (struct kwqe *) &ofld_req2;
770 ofld_req2.num_additional_wqes = 0;
771
772 if (hba->cnic && hba->cnic->submit_kwqes)
773 hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, num_kwqes);
774 }
775
776
777 /**
778 * bnx2i_5771x_send_conn_ofld_req - initiates iscsi connection context creation
779 * @hba: adapter structure pointer
780 * @ep: endpoint (transport indentifier) structure
781 *
782 * 57710 specific - prepares and posts CONN_OFLD_REQ1/2 KWQE
783 */
784 static void bnx2i_5771x_send_conn_ofld_req(struct bnx2i_hba *hba,
785 struct bnx2i_endpoint *ep)
786 {
787 struct kwqe *kwqe_arr[5];
788 struct iscsi_kwqe_conn_offload1 ofld_req1;
789 struct iscsi_kwqe_conn_offload2 ofld_req2;
790 struct iscsi_kwqe_conn_offload3 ofld_req3[1];
791 dma_addr_t dma_addr;
792 int num_kwqes = 2;
793 u32 *ptbl;
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 + ISCSI_SQ_DB_SIZE;
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 + ISCSI_CQ_DB_SIZE;
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 + ISCSI_RQ_DB_SIZE;
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 *)((u8 *)ep->qp.sq_pgtbl_virt + ISCSI_SQ_DB_SIZE);
818 ofld_req2.sq_first_pte.hi = *ptbl++;
819 ofld_req2.sq_first_pte.lo = *ptbl;
820
821 ptbl = (u32 *)((u8 *)ep->qp.cq_pgtbl_virt + ISCSI_CQ_DB_SIZE);
822 ofld_req2.cq_first_pte.hi = *ptbl++;
823 ofld_req2.cq_first_pte.lo = *ptbl;
824
825 kwqe_arr[0] = (struct kwqe *) &ofld_req1;
826 kwqe_arr[1] = (struct kwqe *) &ofld_req2;
827
828 ofld_req2.num_additional_wqes = 1;
829 memset(ofld_req3, 0x00, sizeof(ofld_req3[0]));
830 ptbl = (u32 *)((u8 *)ep->qp.rq_pgtbl_virt + ISCSI_RQ_DB_SIZE);
831 ofld_req3[0].qp_first_pte[0].hi = *ptbl++;
832 ofld_req3[0].qp_first_pte[0].lo = *ptbl;
833
834 kwqe_arr[2] = (struct kwqe *) ofld_req3;
835 /* need if we decide to go with multiple KCQE's per conn */
836 num_kwqes += 1;
837
838 if (hba->cnic && hba->cnic->submit_kwqes)
839 hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, num_kwqes);
840 }
841
842 /**
843 * bnx2i_send_conn_ofld_req - initiates iscsi connection context setup process
844 *
845 * @hba: adapter structure pointer
846 * @ep: endpoint (transport indentifier) structure
847 *
848 * this routine prepares and posts CONN_OFLD_REQ1/2 KWQE
849 */
850 void bnx2i_send_conn_ofld_req(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
851 {
852 if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type))
853 bnx2i_5771x_send_conn_ofld_req(hba, ep);
854 else
855 bnx2i_570x_send_conn_ofld_req(hba, ep);
856 }
857
858
859 /**
860 * setup_qp_page_tables - iscsi QP page table setup function
861 * @ep: endpoint (transport indentifier) structure
862 *
863 * Sets up page tables for SQ/RQ/CQ, 1G/sec (5706/5708/5709) devices requires
864 * 64-bit address in big endian format. Whereas 10G/sec (57710) requires
865 * PT in little endian format
866 */
867 static void setup_qp_page_tables(struct bnx2i_endpoint *ep)
868 {
869 int num_pages;
870 u32 *ptbl;
871 dma_addr_t page;
872 int cnic_dev_10g;
873
874 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
875 cnic_dev_10g = 1;
876 else
877 cnic_dev_10g = 0;
878
879 /* SQ page table */
880 memset(ep->qp.sq_pgtbl_virt, 0, ep->qp.sq_pgtbl_size);
881 num_pages = ep->qp.sq_mem_size / PAGE_SIZE;
882 page = ep->qp.sq_phys;
883
884 if (cnic_dev_10g)
885 ptbl = (u32 *)((u8 *)ep->qp.sq_pgtbl_virt + ISCSI_SQ_DB_SIZE);
886 else
887 ptbl = (u32 *) ep->qp.sq_pgtbl_virt;
888 while (num_pages--) {
889 if (cnic_dev_10g) {
890 /* PTE is written in little endian format for 57710 */
891 *ptbl = (u32) page;
892 ptbl++;
893 *ptbl = (u32) ((u64) page >> 32);
894 ptbl++;
895 page += PAGE_SIZE;
896 } else {
897 /* PTE is written in big endian format for
898 * 5706/5708/5709 devices */
899 *ptbl = (u32) ((u64) page >> 32);
900 ptbl++;
901 *ptbl = (u32) page;
902 ptbl++;
903 page += PAGE_SIZE;
904 }
905 }
906
907 /* RQ page table */
908 memset(ep->qp.rq_pgtbl_virt, 0, ep->qp.rq_pgtbl_size);
909 num_pages = ep->qp.rq_mem_size / PAGE_SIZE;
910 page = ep->qp.rq_phys;
911
912 if (cnic_dev_10g)
913 ptbl = (u32 *)((u8 *)ep->qp.rq_pgtbl_virt + ISCSI_RQ_DB_SIZE);
914 else
915 ptbl = (u32 *) ep->qp.rq_pgtbl_virt;
916 while (num_pages--) {
917 if (cnic_dev_10g) {
918 /* PTE is written in little endian format for 57710 */
919 *ptbl = (u32) page;
920 ptbl++;
921 *ptbl = (u32) ((u64) page >> 32);
922 ptbl++;
923 page += PAGE_SIZE;
924 } else {
925 /* PTE is written in big endian format for
926 * 5706/5708/5709 devices */
927 *ptbl = (u32) ((u64) page >> 32);
928 ptbl++;
929 *ptbl = (u32) page;
930 ptbl++;
931 page += PAGE_SIZE;
932 }
933 }
934
935 /* CQ page table */
936 memset(ep->qp.cq_pgtbl_virt, 0, ep->qp.cq_pgtbl_size);
937 num_pages = ep->qp.cq_mem_size / PAGE_SIZE;
938 page = ep->qp.cq_phys;
939
940 if (cnic_dev_10g)
941 ptbl = (u32 *)((u8 *)ep->qp.cq_pgtbl_virt + ISCSI_CQ_DB_SIZE);
942 else
943 ptbl = (u32 *) ep->qp.cq_pgtbl_virt;
944 while (num_pages--) {
945 if (cnic_dev_10g) {
946 /* PTE is written in little endian format for 57710 */
947 *ptbl = (u32) page;
948 ptbl++;
949 *ptbl = (u32) ((u64) page >> 32);
950 ptbl++;
951 page += PAGE_SIZE;
952 } else {
953 /* PTE is written in big endian format for
954 * 5706/5708/5709 devices */
955 *ptbl = (u32) ((u64) page >> 32);
956 ptbl++;
957 *ptbl = (u32) page;
958 ptbl++;
959 page += PAGE_SIZE;
960 }
961 }
962 }
963
964
965 /**
966 * bnx2i_alloc_qp_resc - allocates required resources for QP.
967 * @hba: adapter structure pointer
968 * @ep: endpoint (transport indentifier) structure
969 *
970 * Allocate QP (transport layer for iSCSI connection) resources, DMA'able
971 * memory for SQ/RQ/CQ and page tables. EP structure elements such
972 * as producer/consumer indexes/pointers, queue sizes and page table
973 * contents are setup
974 */
975 int bnx2i_alloc_qp_resc(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
976 {
977 struct bnx2i_5771x_cq_db *cq_db;
978
979 ep->hba = hba;
980 ep->conn = NULL;
981 ep->ep_cid = ep->ep_iscsi_cid = ep->ep_pg_cid = 0;
982
983 /* Allocate page table memory for SQ which is page aligned */
984 ep->qp.sq_mem_size = hba->max_sqes * BNX2I_SQ_WQE_SIZE;
985 ep->qp.sq_mem_size =
986 (ep->qp.sq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
987 ep->qp.sq_pgtbl_size =
988 (ep->qp.sq_mem_size / PAGE_SIZE) * sizeof(void *);
989 ep->qp.sq_pgtbl_size =
990 (ep->qp.sq_pgtbl_size + (PAGE_SIZE - 1)) & PAGE_MASK;
991
992 ep->qp.sq_pgtbl_virt =
993 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.sq_pgtbl_size,
994 &ep->qp.sq_pgtbl_phys, GFP_KERNEL);
995 if (!ep->qp.sq_pgtbl_virt) {
996 printk(KERN_ALERT "bnx2i: unable to alloc SQ PT mem (%d)\n",
997 ep->qp.sq_pgtbl_size);
998 goto mem_alloc_err;
999 }
1000
1001 /* Allocate memory area for actual SQ element */
1002 ep->qp.sq_virt =
1003 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.sq_mem_size,
1004 &ep->qp.sq_phys, GFP_KERNEL);
1005 if (!ep->qp.sq_virt) {
1006 printk(KERN_ALERT "bnx2i: unable to alloc SQ BD memory %d\n",
1007 ep->qp.sq_mem_size);
1008 goto mem_alloc_err;
1009 }
1010
1011 memset(ep->qp.sq_virt, 0x00, ep->qp.sq_mem_size);
1012 ep->qp.sq_first_qe = ep->qp.sq_virt;
1013 ep->qp.sq_prod_qe = ep->qp.sq_first_qe;
1014 ep->qp.sq_cons_qe = ep->qp.sq_first_qe;
1015 ep->qp.sq_last_qe = &ep->qp.sq_first_qe[hba->max_sqes - 1];
1016 ep->qp.sq_prod_idx = 0;
1017 ep->qp.sq_cons_idx = 0;
1018 ep->qp.sqe_left = hba->max_sqes;
1019
1020 /* Allocate page table memory for CQ which is page aligned */
1021 ep->qp.cq_mem_size = hba->max_cqes * BNX2I_CQE_SIZE;
1022 ep->qp.cq_mem_size =
1023 (ep->qp.cq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
1024 ep->qp.cq_pgtbl_size =
1025 (ep->qp.cq_mem_size / PAGE_SIZE) * sizeof(void *);
1026 ep->qp.cq_pgtbl_size =
1027 (ep->qp.cq_pgtbl_size + (PAGE_SIZE - 1)) & PAGE_MASK;
1028
1029 ep->qp.cq_pgtbl_virt =
1030 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.cq_pgtbl_size,
1031 &ep->qp.cq_pgtbl_phys, GFP_KERNEL);
1032 if (!ep->qp.cq_pgtbl_virt) {
1033 printk(KERN_ALERT "bnx2i: unable to alloc CQ PT memory %d\n",
1034 ep->qp.cq_pgtbl_size);
1035 goto mem_alloc_err;
1036 }
1037
1038 /* Allocate memory area for actual CQ element */
1039 ep->qp.cq_virt =
1040 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.cq_mem_size,
1041 &ep->qp.cq_phys, GFP_KERNEL);
1042 if (!ep->qp.cq_virt) {
1043 printk(KERN_ALERT "bnx2i: unable to alloc CQ BD memory %d\n",
1044 ep->qp.cq_mem_size);
1045 goto mem_alloc_err;
1046 }
1047 memset(ep->qp.cq_virt, 0x00, ep->qp.cq_mem_size);
1048
1049 ep->qp.cq_first_qe = ep->qp.cq_virt;
1050 ep->qp.cq_prod_qe = ep->qp.cq_first_qe;
1051 ep->qp.cq_cons_qe = ep->qp.cq_first_qe;
1052 ep->qp.cq_last_qe = &ep->qp.cq_first_qe[hba->max_cqes - 1];
1053 ep->qp.cq_prod_idx = 0;
1054 ep->qp.cq_cons_idx = 0;
1055 ep->qp.cqe_left = hba->max_cqes;
1056 ep->qp.cqe_exp_seq_sn = ISCSI_INITIAL_SN;
1057 ep->qp.cqe_size = hba->max_cqes;
1058
1059 /* Invalidate all EQ CQE index, req only for 57710 */
1060 cq_db = (struct bnx2i_5771x_cq_db *) ep->qp.cq_pgtbl_virt;
1061 memset(cq_db->sqn, 0xFF, sizeof(cq_db->sqn[0]) * BNX2X_MAX_CQS);
1062
1063 /* Allocate page table memory for RQ which is page aligned */
1064 ep->qp.rq_mem_size = hba->max_rqes * BNX2I_RQ_WQE_SIZE;
1065 ep->qp.rq_mem_size =
1066 (ep->qp.rq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
1067 ep->qp.rq_pgtbl_size =
1068 (ep->qp.rq_mem_size / PAGE_SIZE) * sizeof(void *);
1069 ep->qp.rq_pgtbl_size =
1070 (ep->qp.rq_pgtbl_size + (PAGE_SIZE - 1)) & PAGE_MASK;
1071
1072 ep->qp.rq_pgtbl_virt =
1073 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.rq_pgtbl_size,
1074 &ep->qp.rq_pgtbl_phys, GFP_KERNEL);
1075 if (!ep->qp.rq_pgtbl_virt) {
1076 printk(KERN_ALERT "bnx2i: unable to alloc RQ PT mem %d\n",
1077 ep->qp.rq_pgtbl_size);
1078 goto mem_alloc_err;
1079 }
1080
1081 /* Allocate memory area for actual RQ element */
1082 ep->qp.rq_virt =
1083 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.rq_mem_size,
1084 &ep->qp.rq_phys, GFP_KERNEL);
1085 if (!ep->qp.rq_virt) {
1086 printk(KERN_ALERT "bnx2i: unable to alloc RQ BD memory %d\n",
1087 ep->qp.rq_mem_size);
1088 goto mem_alloc_err;
1089 }
1090
1091 ep->qp.rq_first_qe = ep->qp.rq_virt;
1092 ep->qp.rq_prod_qe = ep->qp.rq_first_qe;
1093 ep->qp.rq_cons_qe = ep->qp.rq_first_qe;
1094 ep->qp.rq_last_qe = &ep->qp.rq_first_qe[hba->max_rqes - 1];
1095 ep->qp.rq_prod_idx = 0x8000;
1096 ep->qp.rq_cons_idx = 0;
1097 ep->qp.rqe_left = hba->max_rqes;
1098
1099 setup_qp_page_tables(ep);
1100
1101 return 0;
1102
1103 mem_alloc_err:
1104 bnx2i_free_qp_resc(hba, ep);
1105 return -ENOMEM;
1106 }
1107
1108
1109
1110 /**
1111 * bnx2i_free_qp_resc - free memory resources held by QP
1112 * @hba: adapter structure pointer
1113 * @ep: endpoint (transport indentifier) structure
1114 *
1115 * Free QP resources - SQ/RQ/CQ memory and page tables.
1116 */
1117 void bnx2i_free_qp_resc(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
1118 {
1119 if (ep->qp.ctx_base) {
1120 iounmap(ep->qp.ctx_base);
1121 ep->qp.ctx_base = NULL;
1122 }
1123 /* Free SQ mem */
1124 if (ep->qp.sq_pgtbl_virt) {
1125 dma_free_coherent(&hba->pcidev->dev, ep->qp.sq_pgtbl_size,
1126 ep->qp.sq_pgtbl_virt, ep->qp.sq_pgtbl_phys);
1127 ep->qp.sq_pgtbl_virt = NULL;
1128 ep->qp.sq_pgtbl_phys = 0;
1129 }
1130 if (ep->qp.sq_virt) {
1131 dma_free_coherent(&hba->pcidev->dev, ep->qp.sq_mem_size,
1132 ep->qp.sq_virt, ep->qp.sq_phys);
1133 ep->qp.sq_virt = NULL;
1134 ep->qp.sq_phys = 0;
1135 }
1136
1137 /* Free RQ mem */
1138 if (ep->qp.rq_pgtbl_virt) {
1139 dma_free_coherent(&hba->pcidev->dev, ep->qp.rq_pgtbl_size,
1140 ep->qp.rq_pgtbl_virt, ep->qp.rq_pgtbl_phys);
1141 ep->qp.rq_pgtbl_virt = NULL;
1142 ep->qp.rq_pgtbl_phys = 0;
1143 }
1144 if (ep->qp.rq_virt) {
1145 dma_free_coherent(&hba->pcidev->dev, ep->qp.rq_mem_size,
1146 ep->qp.rq_virt, ep->qp.rq_phys);
1147 ep->qp.rq_virt = NULL;
1148 ep->qp.rq_phys = 0;
1149 }
1150
1151 /* Free CQ mem */
1152 if (ep->qp.cq_pgtbl_virt) {
1153 dma_free_coherent(&hba->pcidev->dev, ep->qp.cq_pgtbl_size,
1154 ep->qp.cq_pgtbl_virt, ep->qp.cq_pgtbl_phys);
1155 ep->qp.cq_pgtbl_virt = NULL;
1156 ep->qp.cq_pgtbl_phys = 0;
1157 }
1158 if (ep->qp.cq_virt) {
1159 dma_free_coherent(&hba->pcidev->dev, ep->qp.cq_mem_size,
1160 ep->qp.cq_virt, ep->qp.cq_phys);
1161 ep->qp.cq_virt = NULL;
1162 ep->qp.cq_phys = 0;
1163 }
1164 }
1165
1166
1167 /**
1168 * bnx2i_send_fw_iscsi_init_msg - initiates initial handshake with iscsi f/w
1169 * @hba: adapter structure pointer
1170 *
1171 * Send down iscsi_init KWQEs which initiates the initial handshake with the f/w
1172 * This results in iSCSi support validation and on-chip context manager
1173 * initialization. Firmware completes this handshake with a CQE carrying
1174 * the result of iscsi support validation. Parameter carried by
1175 * iscsi init request determines the number of offloaded connection and
1176 * tolerance level for iscsi protocol violation this hba/chip can support
1177 */
1178 int bnx2i_send_fw_iscsi_init_msg(struct bnx2i_hba *hba)
1179 {
1180 struct kwqe *kwqe_arr[3];
1181 struct iscsi_kwqe_init1 iscsi_init;
1182 struct iscsi_kwqe_init2 iscsi_init2;
1183 int rc = 0;
1184 u64 mask64;
1185
1186 bnx2i_adjust_qp_size(hba);
1187
1188 iscsi_init.flags =
1189 ISCSI_PAGE_SIZE_4K << ISCSI_KWQE_INIT1_PAGE_SIZE_SHIFT;
1190 if (en_tcp_dack)
1191 iscsi_init.flags |= ISCSI_KWQE_INIT1_DELAYED_ACK_ENABLE;
1192 iscsi_init.reserved0 = 0;
1193 iscsi_init.num_cqs = 1;
1194 iscsi_init.hdr.op_code = ISCSI_KWQE_OPCODE_INIT1;
1195 iscsi_init.hdr.flags =
1196 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
1197
1198 iscsi_init.dummy_buffer_addr_lo = (u32) hba->dummy_buf_dma;
1199 iscsi_init.dummy_buffer_addr_hi =
1200 (u32) ((u64) hba->dummy_buf_dma >> 32);
1201
1202 hba->ctx_ccell_tasks =
1203 ((hba->num_ccell & 0xFFFF) | (hba->max_sqes << 16));
1204 iscsi_init.num_ccells_per_conn = hba->num_ccell;
1205 iscsi_init.num_tasks_per_conn = hba->max_sqes;
1206 iscsi_init.sq_wqes_per_page = PAGE_SIZE / BNX2I_SQ_WQE_SIZE;
1207 iscsi_init.sq_num_wqes = hba->max_sqes;
1208 iscsi_init.cq_log_wqes_per_page =
1209 (u8) bnx2i_power_of2(PAGE_SIZE / BNX2I_CQE_SIZE);
1210 iscsi_init.cq_num_wqes = hba->max_cqes;
1211 iscsi_init.cq_num_pages = (hba->max_cqes * BNX2I_CQE_SIZE +
1212 (PAGE_SIZE - 1)) / PAGE_SIZE;
1213 iscsi_init.sq_num_pages = (hba->max_sqes * BNX2I_SQ_WQE_SIZE +
1214 (PAGE_SIZE - 1)) / PAGE_SIZE;
1215 iscsi_init.rq_buffer_size = BNX2I_RQ_WQE_SIZE;
1216 iscsi_init.rq_num_wqes = hba->max_rqes;
1217
1218
1219 iscsi_init2.hdr.op_code = ISCSI_KWQE_OPCODE_INIT2;
1220 iscsi_init2.hdr.flags =
1221 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
1222 iscsi_init2.max_cq_sqn = hba->max_cqes * 2 + 1;
1223 mask64 = 0x0ULL;
1224 mask64 |= (
1225 /* CISCO MDS */
1226 (1UL <<
1227 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_NOT_RSRV) |
1228 /* HP MSA1510i */
1229 (1UL <<
1230 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_EXP_DATASN) |
1231 /* EMC */
1232 (1ULL << ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_LUN));
1233 if (error_mask1)
1234 iscsi_init2.error_bit_map[0] = error_mask1;
1235 else
1236 iscsi_init2.error_bit_map[0] = (u32) mask64;
1237
1238 if (error_mask2)
1239 iscsi_init2.error_bit_map[1] = error_mask2;
1240 else
1241 iscsi_init2.error_bit_map[1] = (u32) (mask64 >> 32);
1242
1243 iscsi_error_mask = mask64;
1244
1245 kwqe_arr[0] = (struct kwqe *) &iscsi_init;
1246 kwqe_arr[1] = (struct kwqe *) &iscsi_init2;
1247
1248 if (hba->cnic && hba->cnic->submit_kwqes)
1249 rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 2);
1250 return rc;
1251 }
1252
1253
1254 /**
1255 * bnx2i_process_scsi_cmd_resp - this function handles scsi cmd completion.
1256 * @conn: iscsi connection
1257 * @cqe: pointer to newly DMA'ed CQE entry for processing
1258 *
1259 * process SCSI CMD Response CQE & complete the request to SCSI-ML
1260 */
1261 static int bnx2i_process_scsi_cmd_resp(struct iscsi_session *session,
1262 struct bnx2i_conn *bnx2i_conn,
1263 struct cqe *cqe)
1264 {
1265 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1266 struct bnx2i_cmd_response *resp_cqe;
1267 struct bnx2i_cmd *bnx2i_cmd;
1268 struct iscsi_task *task;
1269 struct iscsi_cmd_rsp *hdr;
1270 u32 datalen = 0;
1271
1272 resp_cqe = (struct bnx2i_cmd_response *)cqe;
1273 spin_lock(&session->lock);
1274 task = iscsi_itt_to_task(conn,
1275 resp_cqe->itt & ISCSI_CMD_RESPONSE_INDEX);
1276 if (!task)
1277 goto fail;
1278
1279 bnx2i_cmd = task->dd_data;
1280
1281 if (bnx2i_cmd->req.op_attr & ISCSI_CMD_REQUEST_READ) {
1282 conn->datain_pdus_cnt +=
1283 resp_cqe->task_stat.read_stat.num_data_outs;
1284 conn->rxdata_octets +=
1285 bnx2i_cmd->req.total_data_transfer_length;
1286 } else {
1287 conn->dataout_pdus_cnt +=
1288 resp_cqe->task_stat.read_stat.num_data_outs;
1289 conn->r2t_pdus_cnt +=
1290 resp_cqe->task_stat.read_stat.num_r2ts;
1291 conn->txdata_octets +=
1292 bnx2i_cmd->req.total_data_transfer_length;
1293 }
1294 bnx2i_iscsi_unmap_sg_list(bnx2i_cmd);
1295
1296 hdr = (struct iscsi_cmd_rsp *)task->hdr;
1297 resp_cqe = (struct bnx2i_cmd_response *)cqe;
1298 hdr->opcode = resp_cqe->op_code;
1299 hdr->max_cmdsn = cpu_to_be32(resp_cqe->max_cmd_sn);
1300 hdr->exp_cmdsn = cpu_to_be32(resp_cqe->exp_cmd_sn);
1301 hdr->response = resp_cqe->response;
1302 hdr->cmd_status = resp_cqe->status;
1303 hdr->flags = resp_cqe->response_flags;
1304 hdr->residual_count = cpu_to_be32(resp_cqe->residual_count);
1305
1306 if (resp_cqe->op_code == ISCSI_OP_SCSI_DATA_IN)
1307 goto done;
1308
1309 if (resp_cqe->status == SAM_STAT_CHECK_CONDITION) {
1310 datalen = resp_cqe->data_length;
1311 if (datalen < 2)
1312 goto done;
1313
1314 if (datalen > BNX2I_RQ_WQE_SIZE) {
1315 iscsi_conn_printk(KERN_ERR, conn,
1316 "sense data len %d > RQ sz\n",
1317 datalen);
1318 datalen = BNX2I_RQ_WQE_SIZE;
1319 } else if (datalen > ISCSI_DEF_MAX_RECV_SEG_LEN) {
1320 iscsi_conn_printk(KERN_ERR, conn,
1321 "sense data len %d > conn data\n",
1322 datalen);
1323 datalen = ISCSI_DEF_MAX_RECV_SEG_LEN;
1324 }
1325
1326 bnx2i_get_rq_buf(bnx2i_cmd->conn, conn->data, datalen);
1327 bnx2i_put_rq_buf(bnx2i_cmd->conn, 1);
1328 }
1329
1330 done:
1331 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr,
1332 conn->data, datalen);
1333 fail:
1334 spin_unlock(&session->lock);
1335 return 0;
1336 }
1337
1338
1339 /**
1340 * bnx2i_process_login_resp - this function handles iscsi login response
1341 * @session: iscsi session pointer
1342 * @bnx2i_conn: iscsi connection pointer
1343 * @cqe: pointer to newly DMA'ed CQE entry for processing
1344 *
1345 * process Login Response CQE & complete it to open-iscsi user daemon
1346 */
1347 static int bnx2i_process_login_resp(struct iscsi_session *session,
1348 struct bnx2i_conn *bnx2i_conn,
1349 struct cqe *cqe)
1350 {
1351 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1352 struct iscsi_task *task;
1353 struct bnx2i_login_response *login;
1354 struct iscsi_login_rsp *resp_hdr;
1355 int pld_len;
1356 int pad_len;
1357
1358 login = (struct bnx2i_login_response *) cqe;
1359 spin_lock(&session->lock);
1360 task = iscsi_itt_to_task(conn,
1361 login->itt & ISCSI_LOGIN_RESPONSE_INDEX);
1362 if (!task)
1363 goto done;
1364
1365 resp_hdr = (struct iscsi_login_rsp *) &bnx2i_conn->gen_pdu.resp_hdr;
1366 memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1367 resp_hdr->opcode = login->op_code;
1368 resp_hdr->flags = login->response_flags;
1369 resp_hdr->max_version = login->version_max;
1370 resp_hdr->active_version = login->version_active;
1371 resp_hdr->hlength = 0;
1372
1373 hton24(resp_hdr->dlength, login->data_length);
1374 memcpy(resp_hdr->isid, &login->isid_lo, 6);
1375 resp_hdr->tsih = cpu_to_be16(login->tsih);
1376 resp_hdr->itt = task->hdr->itt;
1377 resp_hdr->statsn = cpu_to_be32(login->stat_sn);
1378 resp_hdr->exp_cmdsn = cpu_to_be32(login->exp_cmd_sn);
1379 resp_hdr->max_cmdsn = cpu_to_be32(login->max_cmd_sn);
1380 resp_hdr->status_class = login->status_class;
1381 resp_hdr->status_detail = login->status_detail;
1382 pld_len = login->data_length;
1383 bnx2i_conn->gen_pdu.resp_wr_ptr =
1384 bnx2i_conn->gen_pdu.resp_buf + pld_len;
1385
1386 pad_len = 0;
1387 if (pld_len & 0x3)
1388 pad_len = 4 - (pld_len % 4);
1389
1390 if (pad_len) {
1391 int i = 0;
1392 for (i = 0; i < pad_len; i++) {
1393 bnx2i_conn->gen_pdu.resp_wr_ptr[0] = 0;
1394 bnx2i_conn->gen_pdu.resp_wr_ptr++;
1395 }
1396 }
1397
1398 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr,
1399 bnx2i_conn->gen_pdu.resp_buf,
1400 bnx2i_conn->gen_pdu.resp_wr_ptr - bnx2i_conn->gen_pdu.resp_buf);
1401 done:
1402 spin_unlock(&session->lock);
1403 return 0;
1404 }
1405
1406 /**
1407 * bnx2i_process_tmf_resp - this function handles iscsi TMF response
1408 * @session: iscsi session pointer
1409 * @bnx2i_conn: iscsi connection pointer
1410 * @cqe: pointer to newly DMA'ed CQE entry for processing
1411 *
1412 * process iSCSI TMF Response CQE and wake up the driver eh thread.
1413 */
1414 static int bnx2i_process_tmf_resp(struct iscsi_session *session,
1415 struct bnx2i_conn *bnx2i_conn,
1416 struct cqe *cqe)
1417 {
1418 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1419 struct iscsi_task *task;
1420 struct bnx2i_tmf_response *tmf_cqe;
1421 struct iscsi_tm_rsp *resp_hdr;
1422
1423 tmf_cqe = (struct bnx2i_tmf_response *)cqe;
1424 spin_lock(&session->lock);
1425 task = iscsi_itt_to_task(conn,
1426 tmf_cqe->itt & ISCSI_TMF_RESPONSE_INDEX);
1427 if (!task)
1428 goto done;
1429
1430 resp_hdr = (struct iscsi_tm_rsp *) &bnx2i_conn->gen_pdu.resp_hdr;
1431 memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1432 resp_hdr->opcode = tmf_cqe->op_code;
1433 resp_hdr->max_cmdsn = cpu_to_be32(tmf_cqe->max_cmd_sn);
1434 resp_hdr->exp_cmdsn = cpu_to_be32(tmf_cqe->exp_cmd_sn);
1435 resp_hdr->itt = task->hdr->itt;
1436 resp_hdr->response = tmf_cqe->response;
1437
1438 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0);
1439 done:
1440 spin_unlock(&session->lock);
1441 return 0;
1442 }
1443
1444 /**
1445 * bnx2i_process_logout_resp - this function handles iscsi logout response
1446 * @session: iscsi session pointer
1447 * @bnx2i_conn: iscsi connection pointer
1448 * @cqe: pointer to newly DMA'ed CQE entry for processing
1449 *
1450 * process iSCSI Logout Response CQE & make function call to
1451 * notify the user daemon.
1452 */
1453 static int bnx2i_process_logout_resp(struct iscsi_session *session,
1454 struct bnx2i_conn *bnx2i_conn,
1455 struct cqe *cqe)
1456 {
1457 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1458 struct iscsi_task *task;
1459 struct bnx2i_logout_response *logout;
1460 struct iscsi_logout_rsp *resp_hdr;
1461
1462 logout = (struct bnx2i_logout_response *) cqe;
1463 spin_lock(&session->lock);
1464 task = iscsi_itt_to_task(conn,
1465 logout->itt & ISCSI_LOGOUT_RESPONSE_INDEX);
1466 if (!task)
1467 goto done;
1468
1469 resp_hdr = (struct iscsi_logout_rsp *) &bnx2i_conn->gen_pdu.resp_hdr;
1470 memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1471 resp_hdr->opcode = logout->op_code;
1472 resp_hdr->flags = logout->response;
1473 resp_hdr->hlength = 0;
1474
1475 resp_hdr->itt = task->hdr->itt;
1476 resp_hdr->statsn = task->hdr->exp_statsn;
1477 resp_hdr->exp_cmdsn = cpu_to_be32(logout->exp_cmd_sn);
1478 resp_hdr->max_cmdsn = cpu_to_be32(logout->max_cmd_sn);
1479
1480 resp_hdr->t2wait = cpu_to_be32(logout->time_to_wait);
1481 resp_hdr->t2retain = cpu_to_be32(logout->time_to_retain);
1482
1483 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0);
1484 done:
1485 spin_unlock(&session->lock);
1486 return 0;
1487 }
1488
1489 /**
1490 * bnx2i_process_nopin_local_cmpl - this function handles iscsi nopin CQE
1491 * @session: iscsi session pointer
1492 * @bnx2i_conn: iscsi connection pointer
1493 * @cqe: pointer to newly DMA'ed CQE entry for processing
1494 *
1495 * process iSCSI NOPIN local completion CQE, frees IIT and command structures
1496 */
1497 static void bnx2i_process_nopin_local_cmpl(struct iscsi_session *session,
1498 struct bnx2i_conn *bnx2i_conn,
1499 struct cqe *cqe)
1500 {
1501 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1502 struct bnx2i_nop_in_msg *nop_in;
1503 struct iscsi_task *task;
1504
1505 nop_in = (struct bnx2i_nop_in_msg *)cqe;
1506 spin_lock(&session->lock);
1507 task = iscsi_itt_to_task(conn,
1508 nop_in->itt & ISCSI_NOP_IN_MSG_INDEX);
1509 if (task)
1510 iscsi_put_task(task);
1511 spin_unlock(&session->lock);
1512 }
1513
1514 /**
1515 * bnx2i_unsol_pdu_adjust_rq - makes adjustments to RQ after unsol pdu is recvd
1516 * @conn: iscsi connection
1517 *
1518 * Firmware advances RQ producer index for every unsolicited PDU even if
1519 * payload data length is '0'. This function makes corresponding
1520 * adjustments on the driver side to match this f/w behavior
1521 */
1522 static void bnx2i_unsol_pdu_adjust_rq(struct bnx2i_conn *bnx2i_conn)
1523 {
1524 char dummy_rq_data[2];
1525 bnx2i_get_rq_buf(bnx2i_conn, dummy_rq_data, 1);
1526 bnx2i_put_rq_buf(bnx2i_conn, 1);
1527 }
1528
1529
1530 /**
1531 * bnx2i_process_nopin_mesg - this function handles iscsi nopin CQE
1532 * @session: iscsi session pointer
1533 * @bnx2i_conn: iscsi connection pointer
1534 * @cqe: pointer to newly DMA'ed CQE entry for processing
1535 *
1536 * process iSCSI target's proactive iSCSI NOPIN request
1537 */
1538 static int bnx2i_process_nopin_mesg(struct iscsi_session *session,
1539 struct bnx2i_conn *bnx2i_conn,
1540 struct cqe *cqe)
1541 {
1542 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1543 struct iscsi_task *task;
1544 struct bnx2i_nop_in_msg *nop_in;
1545 struct iscsi_nopin *hdr;
1546 u32 itt;
1547 int tgt_async_nop = 0;
1548
1549 nop_in = (struct bnx2i_nop_in_msg *)cqe;
1550 itt = nop_in->itt & ISCSI_NOP_IN_MSG_INDEX;
1551
1552 spin_lock(&session->lock);
1553 hdr = (struct iscsi_nopin *)&bnx2i_conn->gen_pdu.resp_hdr;
1554 memset(hdr, 0, sizeof(struct iscsi_hdr));
1555 hdr->opcode = nop_in->op_code;
1556 hdr->max_cmdsn = cpu_to_be32(nop_in->max_cmd_sn);
1557 hdr->exp_cmdsn = cpu_to_be32(nop_in->exp_cmd_sn);
1558 hdr->ttt = cpu_to_be32(nop_in->ttt);
1559
1560 if (itt == (u16) RESERVED_ITT) {
1561 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
1562 hdr->itt = RESERVED_ITT;
1563 tgt_async_nop = 1;
1564 goto done;
1565 }
1566
1567 /* this is a response to one of our nop-outs */
1568 task = iscsi_itt_to_task(conn, itt);
1569 if (task) {
1570 hdr->flags = ISCSI_FLAG_CMD_FINAL;
1571 hdr->itt = task->hdr->itt;
1572 hdr->ttt = cpu_to_be32(nop_in->ttt);
1573 memcpy(hdr->lun, nop_in->lun, 8);
1574 }
1575 done:
1576 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, NULL, 0);
1577 spin_unlock(&session->lock);
1578
1579 return tgt_async_nop;
1580 }
1581
1582
1583 /**
1584 * bnx2i_process_async_mesg - this function handles iscsi async message
1585 * @session: iscsi session pointer
1586 * @bnx2i_conn: iscsi connection pointer
1587 * @cqe: pointer to newly DMA'ed CQE entry for processing
1588 *
1589 * process iSCSI ASYNC Message
1590 */
1591 static void bnx2i_process_async_mesg(struct iscsi_session *session,
1592 struct bnx2i_conn *bnx2i_conn,
1593 struct cqe *cqe)
1594 {
1595 struct bnx2i_async_msg *async_cqe;
1596 struct iscsi_async *resp_hdr;
1597 u8 async_event;
1598
1599 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
1600
1601 async_cqe = (struct bnx2i_async_msg *)cqe;
1602 async_event = async_cqe->async_event;
1603
1604 if (async_event == ISCSI_ASYNC_MSG_SCSI_EVENT) {
1605 iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data,
1606 "async: scsi events not supported\n");
1607 return;
1608 }
1609
1610 spin_lock(&session->lock);
1611 resp_hdr = (struct iscsi_async *) &bnx2i_conn->gen_pdu.resp_hdr;
1612 memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1613 resp_hdr->opcode = async_cqe->op_code;
1614 resp_hdr->flags = 0x80;
1615
1616 memcpy(resp_hdr->lun, async_cqe->lun, 8);
1617 resp_hdr->exp_cmdsn = cpu_to_be32(async_cqe->exp_cmd_sn);
1618 resp_hdr->max_cmdsn = cpu_to_be32(async_cqe->max_cmd_sn);
1619
1620 resp_hdr->async_event = async_cqe->async_event;
1621 resp_hdr->async_vcode = async_cqe->async_vcode;
1622
1623 resp_hdr->param1 = cpu_to_be16(async_cqe->param1);
1624 resp_hdr->param2 = cpu_to_be16(async_cqe->param2);
1625 resp_hdr->param3 = cpu_to_be16(async_cqe->param3);
1626
1627 __iscsi_complete_pdu(bnx2i_conn->cls_conn->dd_data,
1628 (struct iscsi_hdr *)resp_hdr, NULL, 0);
1629 spin_unlock(&session->lock);
1630 }
1631
1632
1633 /**
1634 * bnx2i_process_reject_mesg - process iscsi reject pdu
1635 * @session: iscsi session pointer
1636 * @bnx2i_conn: iscsi connection pointer
1637 * @cqe: pointer to newly DMA'ed CQE entry for processing
1638 *
1639 * process iSCSI REJECT message
1640 */
1641 static void bnx2i_process_reject_mesg(struct iscsi_session *session,
1642 struct bnx2i_conn *bnx2i_conn,
1643 struct cqe *cqe)
1644 {
1645 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1646 struct bnx2i_reject_msg *reject;
1647 struct iscsi_reject *hdr;
1648
1649 reject = (struct bnx2i_reject_msg *) cqe;
1650 if (reject->data_length) {
1651 bnx2i_get_rq_buf(bnx2i_conn, conn->data, reject->data_length);
1652 bnx2i_put_rq_buf(bnx2i_conn, 1);
1653 } else
1654 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
1655
1656 spin_lock(&session->lock);
1657 hdr = (struct iscsi_reject *) &bnx2i_conn->gen_pdu.resp_hdr;
1658 memset(hdr, 0, sizeof(struct iscsi_hdr));
1659 hdr->opcode = reject->op_code;
1660 hdr->reason = reject->reason;
1661 hton24(hdr->dlength, reject->data_length);
1662 hdr->max_cmdsn = cpu_to_be32(reject->max_cmd_sn);
1663 hdr->exp_cmdsn = cpu_to_be32(reject->exp_cmd_sn);
1664 hdr->ffffffff = cpu_to_be32(RESERVED_ITT);
1665 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, conn->data,
1666 reject->data_length);
1667 spin_unlock(&session->lock);
1668 }
1669
1670 /**
1671 * bnx2i_process_cmd_cleanup_resp - process scsi command clean-up completion
1672 * @session: iscsi session pointer
1673 * @bnx2i_conn: iscsi connection pointer
1674 * @cqe: pointer to newly DMA'ed CQE entry for processing
1675 *
1676 * process command cleanup response CQE during conn shutdown or error recovery
1677 */
1678 static void bnx2i_process_cmd_cleanup_resp(struct iscsi_session *session,
1679 struct bnx2i_conn *bnx2i_conn,
1680 struct cqe *cqe)
1681 {
1682 struct bnx2i_cleanup_response *cmd_clean_rsp;
1683 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1684 struct iscsi_task *task;
1685
1686 cmd_clean_rsp = (struct bnx2i_cleanup_response *)cqe;
1687 spin_lock(&session->lock);
1688 task = iscsi_itt_to_task(conn,
1689 cmd_clean_rsp->itt & ISCSI_CLEANUP_RESPONSE_INDEX);
1690 if (!task)
1691 printk(KERN_ALERT "bnx2i: cmd clean ITT %x not active\n",
1692 cmd_clean_rsp->itt & ISCSI_CLEANUP_RESPONSE_INDEX);
1693 spin_unlock(&session->lock);
1694 complete(&bnx2i_conn->cmd_cleanup_cmpl);
1695 }
1696
1697
1698
1699 /**
1700 * bnx2i_process_new_cqes - process newly DMA'ed CQE's
1701 * @bnx2i_conn: iscsi connection
1702 *
1703 * this function is called by generic KCQ handler to process all pending CQE's
1704 */
1705 static void bnx2i_process_new_cqes(struct bnx2i_conn *bnx2i_conn)
1706 {
1707 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1708 struct iscsi_session *session = conn->session;
1709 struct qp_info *qp = &bnx2i_conn->ep->qp;
1710 struct bnx2i_nop_in_msg *nopin;
1711 int tgt_async_msg;
1712
1713 while (1) {
1714 nopin = (struct bnx2i_nop_in_msg *) qp->cq_cons_qe;
1715 if (nopin->cq_req_sn != qp->cqe_exp_seq_sn)
1716 break;
1717
1718 if (unlikely(test_bit(ISCSI_SUSPEND_BIT, &conn->suspend_rx)))
1719 break;
1720
1721 tgt_async_msg = 0;
1722
1723 switch (nopin->op_code) {
1724 case ISCSI_OP_SCSI_CMD_RSP:
1725 case ISCSI_OP_SCSI_DATA_IN:
1726 bnx2i_process_scsi_cmd_resp(session, bnx2i_conn,
1727 qp->cq_cons_qe);
1728 break;
1729 case ISCSI_OP_LOGIN_RSP:
1730 bnx2i_process_login_resp(session, bnx2i_conn,
1731 qp->cq_cons_qe);
1732 break;
1733 case ISCSI_OP_SCSI_TMFUNC_RSP:
1734 bnx2i_process_tmf_resp(session, bnx2i_conn,
1735 qp->cq_cons_qe);
1736 break;
1737 case ISCSI_OP_LOGOUT_RSP:
1738 bnx2i_process_logout_resp(session, bnx2i_conn,
1739 qp->cq_cons_qe);
1740 break;
1741 case ISCSI_OP_NOOP_IN:
1742 if (bnx2i_process_nopin_mesg(session, bnx2i_conn,
1743 qp->cq_cons_qe))
1744 tgt_async_msg = 1;
1745 break;
1746 case ISCSI_OPCODE_NOPOUT_LOCAL_COMPLETION:
1747 bnx2i_process_nopin_local_cmpl(session, bnx2i_conn,
1748 qp->cq_cons_qe);
1749 break;
1750 case ISCSI_OP_ASYNC_EVENT:
1751 bnx2i_process_async_mesg(session, bnx2i_conn,
1752 qp->cq_cons_qe);
1753 tgt_async_msg = 1;
1754 break;
1755 case ISCSI_OP_REJECT:
1756 bnx2i_process_reject_mesg(session, bnx2i_conn,
1757 qp->cq_cons_qe);
1758 break;
1759 case ISCSI_OPCODE_CLEANUP_RESPONSE:
1760 bnx2i_process_cmd_cleanup_resp(session, bnx2i_conn,
1761 qp->cq_cons_qe);
1762 break;
1763 default:
1764 printk(KERN_ALERT "bnx2i: unknown opcode 0x%x\n",
1765 nopin->op_code);
1766 }
1767
1768 if (!tgt_async_msg)
1769 bnx2i_conn->ep->num_active_cmds--;
1770
1771 /* clear out in production version only, till beta keep opcode
1772 * field intact, will be helpful in debugging (context dump)
1773 * nopin->op_code = 0;
1774 */
1775 qp->cqe_exp_seq_sn++;
1776 if (qp->cqe_exp_seq_sn == (qp->cqe_size * 2 + 1))
1777 qp->cqe_exp_seq_sn = ISCSI_INITIAL_SN;
1778
1779 if (qp->cq_cons_qe == qp->cq_last_qe) {
1780 qp->cq_cons_qe = qp->cq_first_qe;
1781 qp->cq_cons_idx = 0;
1782 } else {
1783 qp->cq_cons_qe++;
1784 qp->cq_cons_idx++;
1785 }
1786 }
1787 bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep, CNIC_ARM_CQE);
1788 }
1789
1790 /**
1791 * bnx2i_fastpath_notification - process global event queue (KCQ)
1792 * @hba: adapter structure pointer
1793 * @new_cqe_kcqe: pointer to newly DMA'ed KCQE entry
1794 *
1795 * Fast path event notification handler, KCQ entry carries context id
1796 * of the connection that has 1 or more pending CQ entries
1797 */
1798 static void bnx2i_fastpath_notification(struct bnx2i_hba *hba,
1799 struct iscsi_kcqe *new_cqe_kcqe)
1800 {
1801 struct bnx2i_conn *conn;
1802 u32 iscsi_cid;
1803
1804 iscsi_cid = new_cqe_kcqe->iscsi_conn_id;
1805 conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
1806
1807 if (!conn) {
1808 printk(KERN_ALERT "cid #%x not valid\n", iscsi_cid);
1809 return;
1810 }
1811 if (!conn->ep) {
1812 printk(KERN_ALERT "cid #%x - ep not bound\n", iscsi_cid);
1813 return;
1814 }
1815
1816 bnx2i_process_new_cqes(conn);
1817 }
1818
1819
1820 /**
1821 * bnx2i_process_update_conn_cmpl - process iscsi conn update completion KCQE
1822 * @hba: adapter structure pointer
1823 * @update_kcqe: kcqe pointer
1824 *
1825 * CONN_UPDATE completion handler, this completes iSCSI connection FFP migration
1826 */
1827 static void bnx2i_process_update_conn_cmpl(struct bnx2i_hba *hba,
1828 struct iscsi_kcqe *update_kcqe)
1829 {
1830 struct bnx2i_conn *conn;
1831 u32 iscsi_cid;
1832
1833 iscsi_cid = update_kcqe->iscsi_conn_id;
1834 conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
1835
1836 if (!conn) {
1837 printk(KERN_ALERT "conn_update: cid %x not valid\n", iscsi_cid);
1838 return;
1839 }
1840 if (!conn->ep) {
1841 printk(KERN_ALERT "cid %x does not have ep bound\n", iscsi_cid);
1842 return;
1843 }
1844
1845 if (update_kcqe->completion_status) {
1846 printk(KERN_ALERT "request failed cid %x\n", iscsi_cid);
1847 conn->ep->state = EP_STATE_ULP_UPDATE_FAILED;
1848 } else
1849 conn->ep->state = EP_STATE_ULP_UPDATE_COMPL;
1850
1851 wake_up_interruptible(&conn->ep->ofld_wait);
1852 }
1853
1854
1855 /**
1856 * bnx2i_recovery_que_add_conn - add connection to recovery queue
1857 * @hba: adapter structure pointer
1858 * @bnx2i_conn: iscsi connection
1859 *
1860 * Add connection to recovery queue and schedule adapter eh worker
1861 */
1862 static void bnx2i_recovery_que_add_conn(struct bnx2i_hba *hba,
1863 struct bnx2i_conn *bnx2i_conn)
1864 {
1865 iscsi_conn_failure(bnx2i_conn->cls_conn->dd_data,
1866 ISCSI_ERR_CONN_FAILED);
1867 }
1868
1869
1870 /**
1871 * bnx2i_process_tcp_error - process error notification on a given connection
1872 *
1873 * @hba: adapter structure pointer
1874 * @tcp_err: tcp error kcqe pointer
1875 *
1876 * handles tcp level error notifications from FW.
1877 */
1878 static void bnx2i_process_tcp_error(struct bnx2i_hba *hba,
1879 struct iscsi_kcqe *tcp_err)
1880 {
1881 struct bnx2i_conn *bnx2i_conn;
1882 u32 iscsi_cid;
1883
1884 iscsi_cid = tcp_err->iscsi_conn_id;
1885 bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
1886
1887 if (!bnx2i_conn) {
1888 printk(KERN_ALERT "bnx2i - cid 0x%x not valid\n", iscsi_cid);
1889 return;
1890 }
1891
1892 printk(KERN_ALERT "bnx2i - cid 0x%x had TCP errors, error code 0x%x\n",
1893 iscsi_cid, tcp_err->completion_status);
1894 bnx2i_recovery_que_add_conn(bnx2i_conn->hba, bnx2i_conn);
1895 }
1896
1897
1898 /**
1899 * bnx2i_process_iscsi_error - process error notification on a given connection
1900 * @hba: adapter structure pointer
1901 * @iscsi_err: iscsi error kcqe pointer
1902 *
1903 * handles iscsi error notifications from the FW. Firmware based in initial
1904 * handshake classifies iscsi protocol / TCP rfc violation into either
1905 * warning or error indications. If indication is of "Error" type, driver
1906 * will initiate session recovery for that connection/session. For
1907 * "Warning" type indication, driver will put out a system log message
1908 * (there will be only one message for each type for the life of the
1909 * session, this is to avoid un-necessarily overloading the system)
1910 */
1911 static void bnx2i_process_iscsi_error(struct bnx2i_hba *hba,
1912 struct iscsi_kcqe *iscsi_err)
1913 {
1914 struct bnx2i_conn *bnx2i_conn;
1915 u32 iscsi_cid;
1916 char warn_notice[] = "iscsi_warning";
1917 char error_notice[] = "iscsi_error";
1918 char additional_notice[64];
1919 char *message;
1920 int need_recovery;
1921 u64 err_mask64;
1922
1923 iscsi_cid = iscsi_err->iscsi_conn_id;
1924 bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
1925 if (!bnx2i_conn) {
1926 printk(KERN_ALERT "bnx2i - cid 0x%x not valid\n", iscsi_cid);
1927 return;
1928 }
1929
1930 err_mask64 = (0x1ULL << iscsi_err->completion_status);
1931
1932 if (err_mask64 & iscsi_error_mask) {
1933 need_recovery = 0;
1934 message = warn_notice;
1935 } else {
1936 need_recovery = 1;
1937 message = error_notice;
1938 }
1939
1940 switch (iscsi_err->completion_status) {
1941 case ISCSI_KCQE_COMPLETION_STATUS_HDR_DIG_ERR:
1942 strcpy(additional_notice, "hdr digest err");
1943 break;
1944 case ISCSI_KCQE_COMPLETION_STATUS_DATA_DIG_ERR:
1945 strcpy(additional_notice, "data digest err");
1946 break;
1947 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_OPCODE:
1948 strcpy(additional_notice, "wrong opcode rcvd");
1949 break;
1950 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_AHS_LEN:
1951 strcpy(additional_notice, "AHS len > 0 rcvd");
1952 break;
1953 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_ITT:
1954 strcpy(additional_notice, "invalid ITT rcvd");
1955 break;
1956 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_STATSN:
1957 strcpy(additional_notice, "wrong StatSN rcvd");
1958 break;
1959 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_EXP_DATASN:
1960 strcpy(additional_notice, "wrong DataSN rcvd");
1961 break;
1962 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T:
1963 strcpy(additional_notice, "pend R2T violation");
1964 break;
1965 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_0:
1966 strcpy(additional_notice, "ERL0, UO");
1967 break;
1968 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_1:
1969 strcpy(additional_notice, "ERL0, U1");
1970 break;
1971 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_2:
1972 strcpy(additional_notice, "ERL0, U2");
1973 break;
1974 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_3:
1975 strcpy(additional_notice, "ERL0, U3");
1976 break;
1977 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_4:
1978 strcpy(additional_notice, "ERL0, U4");
1979 break;
1980 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_5:
1981 strcpy(additional_notice, "ERL0, U5");
1982 break;
1983 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_6:
1984 strcpy(additional_notice, "ERL0, U6");
1985 break;
1986 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REMAIN_RCV_LEN:
1987 strcpy(additional_notice, "invalid resi len");
1988 break;
1989 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_MAX_RCV_PDU_LEN:
1990 strcpy(additional_notice, "MRDSL violation");
1991 break;
1992 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_F_BIT_ZERO:
1993 strcpy(additional_notice, "F-bit not set");
1994 break;
1995 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_NOT_RSRV:
1996 strcpy(additional_notice, "invalid TTT");
1997 break;
1998 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DATASN:
1999 strcpy(additional_notice, "invalid DataSN");
2000 break;
2001 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REMAIN_BURST_LEN:
2002 strcpy(additional_notice, "burst len violation");
2003 break;
2004 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_BUFFER_OFF:
2005 strcpy(additional_notice, "buf offset violation");
2006 break;
2007 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_LUN:
2008 strcpy(additional_notice, "invalid LUN field");
2009 break;
2010 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_R2TSN:
2011 strcpy(additional_notice, "invalid R2TSN field");
2012 break;
2013 #define BNX2I_ERR_DESIRED_DATA_TRNS_LEN_0 \
2014 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_0
2015 case BNX2I_ERR_DESIRED_DATA_TRNS_LEN_0:
2016 strcpy(additional_notice, "invalid cmd len1");
2017 break;
2018 #define BNX2I_ERR_DESIRED_DATA_TRNS_LEN_1 \
2019 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_1
2020 case BNX2I_ERR_DESIRED_DATA_TRNS_LEN_1:
2021 strcpy(additional_notice, "invalid cmd len2");
2022 break;
2023 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T_EXCEED:
2024 strcpy(additional_notice,
2025 "pend r2t exceeds MaxOutstandingR2T value");
2026 break;
2027 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_IS_RSRV:
2028 strcpy(additional_notice, "TTT is rsvd");
2029 break;
2030 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_MAX_BURST_LEN:
2031 strcpy(additional_notice, "MBL violation");
2032 break;
2033 #define BNX2I_ERR_DATA_SEG_LEN_NOT_ZERO \
2034 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DATA_SEG_LEN_NOT_ZERO
2035 case BNX2I_ERR_DATA_SEG_LEN_NOT_ZERO:
2036 strcpy(additional_notice, "data seg len != 0");
2037 break;
2038 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REJECT_PDU_LEN:
2039 strcpy(additional_notice, "reject pdu len error");
2040 break;
2041 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_ASYNC_PDU_LEN:
2042 strcpy(additional_notice, "async pdu len error");
2043 break;
2044 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_NOPIN_PDU_LEN:
2045 strcpy(additional_notice, "nopin pdu len error");
2046 break;
2047 #define BNX2_ERR_PEND_R2T_IN_CLEANUP \
2048 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T_IN_CLEANUP
2049 case BNX2_ERR_PEND_R2T_IN_CLEANUP:
2050 strcpy(additional_notice, "pend r2t in cleanup");
2051 break;
2052
2053 case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_IP_FRAGMENT:
2054 strcpy(additional_notice, "IP fragments rcvd");
2055 break;
2056 case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_IP_OPTIONS:
2057 strcpy(additional_notice, "IP options error");
2058 break;
2059 case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_URGENT_FLAG:
2060 strcpy(additional_notice, "urgent flag error");
2061 break;
2062 default:
2063 printk(KERN_ALERT "iscsi_err - unknown err %x\n",
2064 iscsi_err->completion_status);
2065 }
2066
2067 if (need_recovery) {
2068 iscsi_conn_printk(KERN_ALERT,
2069 bnx2i_conn->cls_conn->dd_data,
2070 "bnx2i: %s - %s\n",
2071 message, additional_notice);
2072
2073 iscsi_conn_printk(KERN_ALERT,
2074 bnx2i_conn->cls_conn->dd_data,
2075 "conn_err - hostno %d conn %p, "
2076 "iscsi_cid %x cid %x\n",
2077 bnx2i_conn->hba->shost->host_no,
2078 bnx2i_conn, bnx2i_conn->ep->ep_iscsi_cid,
2079 bnx2i_conn->ep->ep_cid);
2080 bnx2i_recovery_que_add_conn(bnx2i_conn->hba, bnx2i_conn);
2081 } else
2082 if (!test_and_set_bit(iscsi_err->completion_status,
2083 (void *) &bnx2i_conn->violation_notified))
2084 iscsi_conn_printk(KERN_ALERT,
2085 bnx2i_conn->cls_conn->dd_data,
2086 "bnx2i: %s - %s\n",
2087 message, additional_notice);
2088 }
2089
2090
2091 /**
2092 * bnx2i_process_conn_destroy_cmpl - process iscsi conn destroy completion
2093 * @hba: adapter structure pointer
2094 * @conn_destroy: conn destroy kcqe pointer
2095 *
2096 * handles connection destroy completion request.
2097 */
2098 static void bnx2i_process_conn_destroy_cmpl(struct bnx2i_hba *hba,
2099 struct iscsi_kcqe *conn_destroy)
2100 {
2101 struct bnx2i_endpoint *ep;
2102
2103 ep = bnx2i_find_ep_in_destroy_list(hba, conn_destroy->iscsi_conn_id);
2104 if (!ep) {
2105 printk(KERN_ALERT "bnx2i_conn_destroy_cmpl: no pending "
2106 "offload request, unexpected complection\n");
2107 return;
2108 }
2109
2110 if (hba != ep->hba) {
2111 printk(KERN_ALERT "conn destroy- error hba mis-match\n");
2112 return;
2113 }
2114
2115 if (conn_destroy->completion_status) {
2116 printk(KERN_ALERT "conn_destroy_cmpl: op failed\n");
2117 ep->state = EP_STATE_CLEANUP_FAILED;
2118 } else
2119 ep->state = EP_STATE_CLEANUP_CMPL;
2120 wake_up_interruptible(&ep->ofld_wait);
2121 }
2122
2123
2124 /**
2125 * bnx2i_process_ofld_cmpl - process initial iscsi conn offload completion
2126 * @hba: adapter structure pointer
2127 * @ofld_kcqe: conn offload kcqe pointer
2128 *
2129 * handles initial connection offload completion, ep_connect() thread is
2130 * woken-up to continue with LLP connect process
2131 */
2132 static void bnx2i_process_ofld_cmpl(struct bnx2i_hba *hba,
2133 struct iscsi_kcqe *ofld_kcqe)
2134 {
2135 u32 cid_addr;
2136 struct bnx2i_endpoint *ep;
2137 u32 cid_num;
2138
2139 ep = bnx2i_find_ep_in_ofld_list(hba, ofld_kcqe->iscsi_conn_id);
2140 if (!ep) {
2141 printk(KERN_ALERT "ofld_cmpl: no pend offload request\n");
2142 return;
2143 }
2144
2145 if (hba != ep->hba) {
2146 printk(KERN_ALERT "ofld_cmpl: error hba mis-match\n");
2147 return;
2148 }
2149
2150 if (ofld_kcqe->completion_status) {
2151 if (ofld_kcqe->completion_status ==
2152 ISCSI_KCQE_COMPLETION_STATUS_CTX_ALLOC_FAILURE)
2153 printk(KERN_ALERT "bnx2i: unable to allocate"
2154 " iSCSI context resources\n");
2155 ep->state = EP_STATE_OFLD_FAILED;
2156 } else {
2157 ep->state = EP_STATE_OFLD_COMPL;
2158 cid_addr = ofld_kcqe->iscsi_conn_context_id;
2159 cid_num = bnx2i_get_cid_num(ep);
2160 ep->ep_cid = cid_addr;
2161 ep->qp.ctx_base = NULL;
2162 }
2163 wake_up_interruptible(&ep->ofld_wait);
2164 }
2165
2166 /**
2167 * bnx2i_indicate_kcqe - process iscsi conn update completion KCQE
2168 * @hba: adapter structure pointer
2169 * @update_kcqe: kcqe pointer
2170 *
2171 * Generic KCQ event handler/dispatcher
2172 */
2173 static void bnx2i_indicate_kcqe(void *context, struct kcqe *kcqe[],
2174 u32 num_cqe)
2175 {
2176 struct bnx2i_hba *hba = context;
2177 int i = 0;
2178 struct iscsi_kcqe *ikcqe = NULL;
2179
2180 while (i < num_cqe) {
2181 ikcqe = (struct iscsi_kcqe *) kcqe[i++];
2182
2183 if (ikcqe->op_code ==
2184 ISCSI_KCQE_OPCODE_CQ_EVENT_NOTIFICATION)
2185 bnx2i_fastpath_notification(hba, ikcqe);
2186 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_OFFLOAD_CONN)
2187 bnx2i_process_ofld_cmpl(hba, ikcqe);
2188 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_UPDATE_CONN)
2189 bnx2i_process_update_conn_cmpl(hba, ikcqe);
2190 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_INIT) {
2191 if (ikcqe->completion_status !=
2192 ISCSI_KCQE_COMPLETION_STATUS_SUCCESS)
2193 bnx2i_iscsi_license_error(hba, ikcqe->\
2194 completion_status);
2195 else {
2196 set_bit(ADAPTER_STATE_UP, &hba->adapter_state);
2197 bnx2i_get_link_state(hba);
2198 printk(KERN_INFO "bnx2i [%.2x:%.2x.%.2x]: "
2199 "ISCSI_INIT passed\n",
2200 (u8)hba->pcidev->bus->number,
2201 hba->pci_devno,
2202 (u8)hba->pci_func);
2203
2204
2205 }
2206 } else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_DESTROY_CONN)
2207 bnx2i_process_conn_destroy_cmpl(hba, ikcqe);
2208 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_ISCSI_ERROR)
2209 bnx2i_process_iscsi_error(hba, ikcqe);
2210 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_TCP_ERROR)
2211 bnx2i_process_tcp_error(hba, ikcqe);
2212 else
2213 printk(KERN_ALERT "bnx2i: unknown opcode 0x%x\n",
2214 ikcqe->op_code);
2215 }
2216 }
2217
2218
2219 /**
2220 * bnx2i_indicate_netevent - Generic netdev event handler
2221 * @context: adapter structure pointer
2222 * @event: event type
2223 *
2224 * Handles four netdev events, NETDEV_UP, NETDEV_DOWN,
2225 * NETDEV_GOING_DOWN and NETDEV_CHANGE
2226 */
2227 static void bnx2i_indicate_netevent(void *context, unsigned long event)
2228 {
2229 struct bnx2i_hba *hba = context;
2230
2231 switch (event) {
2232 case NETDEV_UP:
2233 if (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state))
2234 bnx2i_send_fw_iscsi_init_msg(hba);
2235 break;
2236 case NETDEV_DOWN:
2237 clear_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state);
2238 clear_bit(ADAPTER_STATE_UP, &hba->adapter_state);
2239 break;
2240 case NETDEV_GOING_DOWN:
2241 set_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state);
2242 iscsi_host_for_each_session(hba->shost,
2243 bnx2i_drop_session);
2244 break;
2245 case NETDEV_CHANGE:
2246 bnx2i_get_link_state(hba);
2247 break;
2248 default:
2249 ;
2250 }
2251 }
2252
2253
2254 /**
2255 * bnx2i_cm_connect_cmpl - process iscsi conn establishment completion
2256 * @cm_sk: cnic sock structure pointer
2257 *
2258 * function callback exported via bnx2i - cnic driver interface to
2259 * indicate completion of option-2 TCP connect request.
2260 */
2261 static void bnx2i_cm_connect_cmpl(struct cnic_sock *cm_sk)
2262 {
2263 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2264
2265 if (test_bit(ADAPTER_STATE_GOING_DOWN, &ep->hba->adapter_state))
2266 ep->state = EP_STATE_CONNECT_FAILED;
2267 else if (test_bit(SK_F_OFFLD_COMPLETE, &cm_sk->flags))
2268 ep->state = EP_STATE_CONNECT_COMPL;
2269 else
2270 ep->state = EP_STATE_CONNECT_FAILED;
2271
2272 wake_up_interruptible(&ep->ofld_wait);
2273 }
2274
2275
2276 /**
2277 * bnx2i_cm_close_cmpl - process tcp conn close completion
2278 * @cm_sk: cnic sock structure pointer
2279 *
2280 * function callback exported via bnx2i - cnic driver interface to
2281 * indicate completion of option-2 graceful TCP connect shutdown
2282 */
2283 static void bnx2i_cm_close_cmpl(struct cnic_sock *cm_sk)
2284 {
2285 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2286
2287 ep->state = EP_STATE_DISCONN_COMPL;
2288 wake_up_interruptible(&ep->ofld_wait);
2289 }
2290
2291
2292 /**
2293 * bnx2i_cm_abort_cmpl - process abortive tcp conn teardown completion
2294 * @cm_sk: cnic sock structure pointer
2295 *
2296 * function callback exported via bnx2i - cnic driver interface to
2297 * indicate completion of option-2 abortive TCP connect termination
2298 */
2299 static void bnx2i_cm_abort_cmpl(struct cnic_sock *cm_sk)
2300 {
2301 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2302
2303 ep->state = EP_STATE_DISCONN_COMPL;
2304 wake_up_interruptible(&ep->ofld_wait);
2305 }
2306
2307
2308 /**
2309 * bnx2i_cm_remote_close - process received TCP FIN
2310 * @hba: adapter structure pointer
2311 * @update_kcqe: kcqe pointer
2312 *
2313 * function callback exported via bnx2i - cnic driver interface to indicate
2314 * async TCP events such as FIN
2315 */
2316 static void bnx2i_cm_remote_close(struct cnic_sock *cm_sk)
2317 {
2318 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2319
2320 ep->state = EP_STATE_TCP_FIN_RCVD;
2321 if (ep->conn)
2322 bnx2i_recovery_que_add_conn(ep->hba, ep->conn);
2323 }
2324
2325 /**
2326 * bnx2i_cm_remote_abort - process TCP RST and start conn cleanup
2327 * @hba: adapter structure pointer
2328 * @update_kcqe: kcqe pointer
2329 *
2330 * function callback exported via bnx2i - cnic driver interface to
2331 * indicate async TCP events (RST) sent by the peer.
2332 */
2333 static void bnx2i_cm_remote_abort(struct cnic_sock *cm_sk)
2334 {
2335 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2336
2337 ep->state = EP_STATE_TCP_RST_RCVD;
2338 if (ep->conn)
2339 bnx2i_recovery_que_add_conn(ep->hba, ep->conn);
2340 }
2341
2342
2343 static void bnx2i_send_nl_mesg(struct cnic_dev *dev, u32 msg_type,
2344 char *buf, u16 buflen)
2345 {
2346 struct bnx2i_hba *hba;
2347
2348 hba = bnx2i_find_hba_for_cnic(dev);
2349 if (!hba)
2350 return;
2351
2352 if (iscsi_offload_mesg(hba->shost, &bnx2i_iscsi_transport,
2353 msg_type, buf, buflen))
2354 printk(KERN_ALERT "bnx2i: private nl message send error\n");
2355
2356 }
2357
2358
2359 /**
2360 * bnx2i_cnic_cb - global template of bnx2i - cnic driver interface structure
2361 * carrying callback function pointers
2362 *
2363 */
2364 struct cnic_ulp_ops bnx2i_cnic_cb = {
2365 .cnic_init = bnx2i_ulp_init,
2366 .cnic_exit = bnx2i_ulp_exit,
2367 .cnic_start = bnx2i_start,
2368 .cnic_stop = bnx2i_stop,
2369 .indicate_kcqes = bnx2i_indicate_kcqe,
2370 .indicate_netevent = bnx2i_indicate_netevent,
2371 .cm_connect_complete = bnx2i_cm_connect_cmpl,
2372 .cm_close_complete = bnx2i_cm_close_cmpl,
2373 .cm_abort_complete = bnx2i_cm_abort_cmpl,
2374 .cm_remote_close = bnx2i_cm_remote_close,
2375 .cm_remote_abort = bnx2i_cm_remote_abort,
2376 .iscsi_nl_send_msg = bnx2i_send_nl_mesg,
2377 .owner = THIS_MODULE
2378 };
2379
2380
2381 /**
2382 * bnx2i_map_ep_dbell_regs - map connection doorbell registers
2383 * @ep: bnx2i endpoint
2384 *
2385 * maps connection's SQ and RQ doorbell registers, 5706/5708/5709 hosts these
2386 * register in BAR #0. Whereas in 57710 these register are accessed by
2387 * mapping BAR #1
2388 */
2389 int bnx2i_map_ep_dbell_regs(struct bnx2i_endpoint *ep)
2390 {
2391 u32 cid_num;
2392 u32 reg_off;
2393 u32 first_l4l5;
2394 u32 ctx_sz;
2395 u32 config2;
2396 resource_size_t reg_base;
2397
2398 cid_num = bnx2i_get_cid_num(ep);
2399
2400 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
2401 reg_base = pci_resource_start(ep->hba->pcidev,
2402 BNX2X_DOORBELL_PCI_BAR);
2403 reg_off = PAGE_SIZE * (cid_num & 0x1FFFF) + DPM_TRIGER_TYPE;
2404 ep->qp.ctx_base = ioremap_nocache(reg_base + reg_off, 4);
2405 goto arm_cq;
2406 }
2407
2408 reg_base = ep->hba->netdev->base_addr;
2409 if ((test_bit(BNX2I_NX2_DEV_5709, &ep->hba->cnic_dev_type)) &&
2410 (ep->hba->mail_queue_access == BNX2I_MQ_BIN_MODE)) {
2411 config2 = REG_RD(ep->hba, BNX2_MQ_CONFIG2);
2412 first_l4l5 = config2 & BNX2_MQ_CONFIG2_FIRST_L4L5;
2413 ctx_sz = (config2 & BNX2_MQ_CONFIG2_CONT_SZ) >> 3;
2414 if (ctx_sz)
2415 reg_off = CTX_OFFSET + MAX_CID_CNT * MB_KERNEL_CTX_SIZE
2416 + BNX2I_570X_PAGE_SIZE_DEFAULT *
2417 (((cid_num - first_l4l5) / ctx_sz) + 256);
2418 else
2419 reg_off = CTX_OFFSET + (MB_KERNEL_CTX_SIZE * cid_num);
2420 } else
2421 /* 5709 device in normal node and 5706/5708 devices */
2422 reg_off = CTX_OFFSET + (MB_KERNEL_CTX_SIZE * cid_num);
2423
2424 ep->qp.ctx_base = ioremap_nocache(reg_base + reg_off,
2425 MB_KERNEL_CTX_SIZE);
2426 if (!ep->qp.ctx_base)
2427 return -ENOMEM;
2428
2429 arm_cq:
2430 bnx2i_arm_cq_event_coalescing(ep, CNIC_ARM_CQE);
2431 return 0;
2432 }