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Merge branch 'for-linus' of git://oss.sgi.com/xfs/xfs
[linux/fpc-iii.git] / drivers / scsi / bnx2i / bnx2i_hwi.c
blob3a66ca24c7bde9366c63c5be27831b664e6fcc9d
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 <linux/gfp.h>
15 #include <scsi/scsi_tcq.h>
16 #include <scsi/libiscsi.h>
17 #include "bnx2i.h"
18
19 /**
20 * bnx2i_get_cid_num - get cid from ep
21 * @ep: endpoint pointer
22 *
23 * Only applicable to 57710 family of devices
24 */
25 static u32 bnx2i_get_cid_num(struct bnx2i_endpoint *ep)
26 {
27 u32 cid;
28
29 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
30 cid = ep->ep_cid;
31 else
32 cid = GET_CID_NUM(ep->ep_cid);
33 return cid;
34 }
35
36
37 /**
38 * bnx2i_adjust_qp_size - Adjust SQ/RQ/CQ size for 57710 device type
39 * @hba: Adapter for which adjustments is to be made
40 *
41 * Only applicable to 57710 family of devices
42 */
43 static void bnx2i_adjust_qp_size(struct bnx2i_hba *hba)
44 {
45 u32 num_elements_per_pg;
46
47 if (test_bit(BNX2I_NX2_DEV_5706, &hba->cnic_dev_type) ||
48 test_bit(BNX2I_NX2_DEV_5708, &hba->cnic_dev_type) ||
49 test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type)) {
50 if (!is_power_of_2(hba->max_sqes))
51 hba->max_sqes = rounddown_pow_of_two(hba->max_sqes);
52
53 if (!is_power_of_2(hba->max_rqes))
54 hba->max_rqes = rounddown_pow_of_two(hba->max_rqes);
55 }
56
57 /* Adjust each queue size if the user selection does not
58 * yield integral num of page buffers
59 */
60 /* adjust SQ */
61 num_elements_per_pg = PAGE_SIZE / BNX2I_SQ_WQE_SIZE;
62 if (hba->max_sqes < num_elements_per_pg)
63 hba->max_sqes = num_elements_per_pg;
64 else if (hba->max_sqes % num_elements_per_pg)
65 hba->max_sqes = (hba->max_sqes + num_elements_per_pg - 1) &
66 ~(num_elements_per_pg - 1);
67
68 /* adjust CQ */
69 num_elements_per_pg = PAGE_SIZE / BNX2I_CQE_SIZE;
70 if (hba->max_cqes < num_elements_per_pg)
71 hba->max_cqes = num_elements_per_pg;
72 else if (hba->max_cqes % num_elements_per_pg)
73 hba->max_cqes = (hba->max_cqes + num_elements_per_pg - 1) &
74 ~(num_elements_per_pg - 1);
75
76 /* adjust RQ */
77 num_elements_per_pg = PAGE_SIZE / BNX2I_RQ_WQE_SIZE;
78 if (hba->max_rqes < num_elements_per_pg)
79 hba->max_rqes = num_elements_per_pg;
80 else if (hba->max_rqes % num_elements_per_pg)
81 hba->max_rqes = (hba->max_rqes + num_elements_per_pg - 1) &
82 ~(num_elements_per_pg - 1);
83 }
84
85
86 /**
87 * bnx2i_get_link_state - get network interface link state
88 * @hba: adapter instance pointer
89 *
90 * updates adapter structure flag based on netdev state
91 */
92 static void bnx2i_get_link_state(struct bnx2i_hba *hba)
93 {
94 if (test_bit(__LINK_STATE_NOCARRIER, &hba->netdev->state))
95 set_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state);
96 else
97 clear_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state);
98 }
99
100
101 /**
102 * bnx2i_iscsi_license_error - displays iscsi license related error message
103 * @hba: adapter instance pointer
104 * @error_code: error classification
105 *
106 * Puts out an error log when driver is unable to offload iscsi connection
107 * due to license restrictions
108 */
109 static void bnx2i_iscsi_license_error(struct bnx2i_hba *hba, u32 error_code)
110 {
111 if (error_code == ISCSI_KCQE_COMPLETION_STATUS_ISCSI_NOT_SUPPORTED)
112 /* iSCSI offload not supported on this device */
113 printk(KERN_ERR "bnx2i: iSCSI not supported, dev=%s\n",
114 hba->netdev->name);
115 if (error_code == ISCSI_KCQE_COMPLETION_STATUS_LOM_ISCSI_NOT_ENABLED)
116 /* iSCSI offload not supported on this LOM device */
117 printk(KERN_ERR "bnx2i: LOM is not enable to "
118 "offload iSCSI connections, dev=%s\n",
119 hba->netdev->name);
120 set_bit(ADAPTER_STATE_INIT_FAILED, &hba->adapter_state);
121 }
122
123
124 /**
125 * bnx2i_arm_cq_event_coalescing - arms CQ to enable EQ notification
126 * @ep: endpoint (transport indentifier) structure
127 * @action: action, ARM or DISARM. For now only ARM_CQE is used
128 *
129 * Arm'ing CQ will enable chip to generate global EQ events inorder to interrupt
130 * the driver. EQ event is generated CQ index is hit or at least 1 CQ is
131 * outstanding and on chip timer expires
132 */
133 void bnx2i_arm_cq_event_coalescing(struct bnx2i_endpoint *ep, u8 action)
134 {
135 struct bnx2i_5771x_cq_db *cq_db;
136 u16 cq_index;
137 u16 next_index;
138 u32 num_active_cmds;
139
140
141 /* Coalesce CQ entries only on 10G devices */
142 if (!test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
143 return;
144
145 /* Do not update CQ DB multiple times before firmware writes
146 * '0xFFFF' to CQDB->SQN field. Deviation may cause spurious
147 * interrupts and other unwanted results
148 */
149 cq_db = (struct bnx2i_5771x_cq_db *) ep->qp.cq_pgtbl_virt;
150 if (cq_db->sqn[0] && cq_db->sqn[0] != 0xFFFF)
151 return;
152
153 if (action == CNIC_ARM_CQE) {
154 num_active_cmds = ep->num_active_cmds;
155 if (num_active_cmds <= event_coal_min)
156 next_index = 1;
157 else
158 next_index = event_coal_min +
159 (num_active_cmds - event_coal_min) / event_coal_div;
160 if (!next_index)
161 next_index = 1;
162 cq_index = ep->qp.cqe_exp_seq_sn + next_index - 1;
163 if (cq_index > ep->qp.cqe_size * 2)
164 cq_index -= ep->qp.cqe_size * 2;
165 if (!cq_index)
166 cq_index = 1;
167
168 cq_db->sqn[0] = cq_index;
169 }
170 }
171
172
173 /**
174 * bnx2i_get_rq_buf - copy RQ buffer contents to driver buffer
175 * @conn: iscsi connection on which RQ event occured
176 * @ptr: driver buffer to which RQ buffer contents is to
177 * be copied
178 * @len: length of valid data inside RQ buf
179 *
180 * Copies RQ buffer contents from shared (DMA'able) memory region to
181 * driver buffer. RQ is used to DMA unsolicitated iscsi pdu's and
182 * scsi sense info
183 */
184 void bnx2i_get_rq_buf(struct bnx2i_conn *bnx2i_conn, char *ptr, int len)
185 {
186 if (!bnx2i_conn->ep->qp.rqe_left)
187 return;
188
189 bnx2i_conn->ep->qp.rqe_left--;
190 memcpy(ptr, (u8 *) bnx2i_conn->ep->qp.rq_cons_qe, len);
191 if (bnx2i_conn->ep->qp.rq_cons_qe == bnx2i_conn->ep->qp.rq_last_qe) {
192 bnx2i_conn->ep->qp.rq_cons_qe = bnx2i_conn->ep->qp.rq_first_qe;
193 bnx2i_conn->ep->qp.rq_cons_idx = 0;
194 } else {
195 bnx2i_conn->ep->qp.rq_cons_qe++;
196 bnx2i_conn->ep->qp.rq_cons_idx++;
197 }
198 }
199
200
201 static void bnx2i_ring_577xx_doorbell(struct bnx2i_conn *conn)
202 {
203 struct bnx2i_5771x_dbell dbell;
204 u32 msg;
205
206 memset(&dbell, 0, sizeof(dbell));
207 dbell.dbell.header = (B577XX_ISCSI_CONNECTION_TYPE <<
208 B577XX_DOORBELL_HDR_CONN_TYPE_SHIFT);
209 msg = *((u32 *)&dbell);
210 /* TODO : get doorbell register mapping */
211 writel(cpu_to_le32(msg), conn->ep->qp.ctx_base);
212 }
213
214
215 /**
216 * bnx2i_put_rq_buf - Replenish RQ buffer, if required ring on chip doorbell
217 * @conn: iscsi connection on which event to post
218 * @count: number of RQ buffer being posted to chip
219 *
220 * No need to ring hardware doorbell for 57710 family of devices
221 */
222 void bnx2i_put_rq_buf(struct bnx2i_conn *bnx2i_conn, int count)
223 {
224 struct bnx2i_5771x_sq_rq_db *rq_db;
225 u16 hi_bit = (bnx2i_conn->ep->qp.rq_prod_idx & 0x8000);
226 struct bnx2i_endpoint *ep = bnx2i_conn->ep;
227
228 ep->qp.rqe_left += count;
229 ep->qp.rq_prod_idx &= 0x7FFF;
230 ep->qp.rq_prod_idx += count;
231
232 if (ep->qp.rq_prod_idx > bnx2i_conn->hba->max_rqes) {
233 ep->qp.rq_prod_idx %= bnx2i_conn->hba->max_rqes;
234 if (!hi_bit)
235 ep->qp.rq_prod_idx |= 0x8000;
236 } else
237 ep->qp.rq_prod_idx |= hi_bit;
238
239 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
240 rq_db = (struct bnx2i_5771x_sq_rq_db *) ep->qp.rq_pgtbl_virt;
241 rq_db->prod_idx = ep->qp.rq_prod_idx;
242 /* no need to ring hardware doorbell for 57710 */
243 } else {
244 writew(ep->qp.rq_prod_idx,
245 ep->qp.ctx_base + CNIC_RECV_DOORBELL);
246 }
247 mmiowb();
248 }
249
250
251 /**
252 * bnx2i_ring_sq_dbell - Ring SQ doorbell to wake-up the processing engine
253 * @conn: iscsi connection to which new SQ entries belong
254 * @count: number of SQ WQEs to post
255 *
256 * SQ DB is updated in host memory and TX Doorbell is rung for 57710 family
257 * of devices. For 5706/5708/5709 new SQ WQE count is written into the
258 * doorbell register
259 */
260 static void bnx2i_ring_sq_dbell(struct bnx2i_conn *bnx2i_conn, int count)
261 {
262 struct bnx2i_5771x_sq_rq_db *sq_db;
263 struct bnx2i_endpoint *ep = bnx2i_conn->ep;
264
265 ep->num_active_cmds++;
266 wmb(); /* flush SQ WQE memory before the doorbell is rung */
267 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
268 sq_db = (struct bnx2i_5771x_sq_rq_db *) ep->qp.sq_pgtbl_virt;
269 sq_db->prod_idx = ep->qp.sq_prod_idx;
270 bnx2i_ring_577xx_doorbell(bnx2i_conn);
271 } else
272 writew(count, ep->qp.ctx_base + CNIC_SEND_DOORBELL);
273
274 mmiowb(); /* flush posted PCI writes */
275 }
276
277
278 /**
279 * bnx2i_ring_dbell_update_sq_params - update SQ driver parameters
280 * @conn: iscsi connection to which new SQ entries belong
281 * @count: number of SQ WQEs to post
282 *
283 * this routine will update SQ driver parameters and ring the doorbell
284 */
285 static void bnx2i_ring_dbell_update_sq_params(struct bnx2i_conn *bnx2i_conn,
286 int count)
287 {
288 int tmp_cnt;
289
290 if (count == 1) {
291 if (bnx2i_conn->ep->qp.sq_prod_qe ==
292 bnx2i_conn->ep->qp.sq_last_qe)
293 bnx2i_conn->ep->qp.sq_prod_qe =
294 bnx2i_conn->ep->qp.sq_first_qe;
295 else
296 bnx2i_conn->ep->qp.sq_prod_qe++;
297 } else {
298 if ((bnx2i_conn->ep->qp.sq_prod_qe + count) <=
299 bnx2i_conn->ep->qp.sq_last_qe)
300 bnx2i_conn->ep->qp.sq_prod_qe += count;
301 else {
302 tmp_cnt = bnx2i_conn->ep->qp.sq_last_qe -
303 bnx2i_conn->ep->qp.sq_prod_qe;
304 bnx2i_conn->ep->qp.sq_prod_qe =
305 &bnx2i_conn->ep->qp.sq_first_qe[count -
306 (tmp_cnt + 1)];
307 }
308 }
309 bnx2i_conn->ep->qp.sq_prod_idx += count;
310 /* Ring the doorbell */
311 bnx2i_ring_sq_dbell(bnx2i_conn, bnx2i_conn->ep->qp.sq_prod_idx);
312 }
313
314
315 /**
316 * bnx2i_send_iscsi_login - post iSCSI login request MP WQE to hardware
317 * @conn: iscsi connection
318 * @cmd: driver command structure which is requesting
319 * a WQE to sent to chip for further processing
320 *
321 * prepare and post an iSCSI Login request WQE to CNIC firmware
322 */
323 int bnx2i_send_iscsi_login(struct bnx2i_conn *bnx2i_conn,
324 struct iscsi_task *task)
325 {
326 struct bnx2i_cmd *bnx2i_cmd;
327 struct bnx2i_login_request *login_wqe;
328 struct iscsi_login *login_hdr;
329 u32 dword;
330
331 bnx2i_cmd = (struct bnx2i_cmd *)task->dd_data;
332 login_hdr = (struct iscsi_login *)task->hdr;
333 login_wqe = (struct bnx2i_login_request *)
334 bnx2i_conn->ep->qp.sq_prod_qe;
335
336 login_wqe->op_code = login_hdr->opcode;
337 login_wqe->op_attr = login_hdr->flags;
338 login_wqe->version_max = login_hdr->max_version;
339 login_wqe->version_min = login_hdr->min_version;
340 login_wqe->data_length = ntoh24(login_hdr->dlength);
341 login_wqe->isid_lo = *((u32 *) login_hdr->isid);
342 login_wqe->isid_hi = *((u16 *) login_hdr->isid + 2);
343 login_wqe->tsih = login_hdr->tsih;
344 login_wqe->itt = task->itt |
345 (ISCSI_TASK_TYPE_MPATH << ISCSI_LOGIN_REQUEST_TYPE_SHIFT);
346 login_wqe->cid = login_hdr->cid;
347
348 login_wqe->cmd_sn = be32_to_cpu(login_hdr->cmdsn);
349 login_wqe->exp_stat_sn = be32_to_cpu(login_hdr->exp_statsn);
350 login_wqe->flags = ISCSI_LOGIN_REQUEST_UPDATE_EXP_STAT_SN;
351
352 login_wqe->resp_bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_bd_dma;
353 login_wqe->resp_bd_list_addr_hi =
354 (u32) ((u64) bnx2i_conn->gen_pdu.resp_bd_dma >> 32);
355
356 dword = ((1 << ISCSI_LOGIN_REQUEST_NUM_RESP_BDS_SHIFT) |
357 (bnx2i_conn->gen_pdu.resp_buf_size <<
358 ISCSI_LOGIN_REQUEST_RESP_BUFFER_LENGTH_SHIFT));
359 login_wqe->resp_buffer = dword;
360 login_wqe->bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.req_bd_dma;
361 login_wqe->bd_list_addr_hi =
362 (u32) ((u64) bnx2i_conn->gen_pdu.req_bd_dma >> 32);
363 login_wqe->num_bds = 1;
364 login_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
365
366 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
367 return 0;
368 }
369
370 /**
371 * bnx2i_send_iscsi_tmf - post iSCSI task management request MP WQE to hardware
372 * @conn: iscsi connection
373 * @mtask: driver command structure which is requesting
374 * a WQE to sent to chip for further processing
375 *
376 * prepare and post an iSCSI Login request WQE to CNIC firmware
377 */
378 int bnx2i_send_iscsi_tmf(struct bnx2i_conn *bnx2i_conn,
379 struct iscsi_task *mtask)
380 {
381 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
382 struct iscsi_tm *tmfabort_hdr;
383 struct scsi_cmnd *ref_sc;
384 struct iscsi_task *ctask;
385 struct bnx2i_cmd *bnx2i_cmd;
386 struct bnx2i_tmf_request *tmfabort_wqe;
387 u32 dword;
388 u32 scsi_lun[2];
389
390 bnx2i_cmd = (struct bnx2i_cmd *)mtask->dd_data;
391 tmfabort_hdr = (struct iscsi_tm *)mtask->hdr;
392 tmfabort_wqe = (struct bnx2i_tmf_request *)
393 bnx2i_conn->ep->qp.sq_prod_qe;
394
395 tmfabort_wqe->op_code = tmfabort_hdr->opcode;
396 tmfabort_wqe->op_attr = 0;
397 tmfabort_wqe->op_attr =
398 ISCSI_TMF_REQUEST_ALWAYS_ONE | ISCSI_TM_FUNC_ABORT_TASK;
399
400 tmfabort_wqe->itt = (mtask->itt | (ISCSI_TASK_TYPE_MPATH << 14));
401 tmfabort_wqe->reserved2 = 0;
402 tmfabort_wqe->cmd_sn = be32_to_cpu(tmfabort_hdr->cmdsn);
403
404 ctask = iscsi_itt_to_task(conn, tmfabort_hdr->rtt);
405 if (!ctask || !ctask->sc)
406 /*
407 * the iscsi layer must have completed the cmd while this
408 * was starting up.
409 *
410 * Note: In the case of a SCSI cmd timeout, the task's sc
411 * is still active; hence ctask->sc != 0
412 * In this case, the task must be aborted
413 */
414 return 0;
415
416 ref_sc = ctask->sc;
417
418 /* Retrieve LUN directly from the ref_sc */
419 int_to_scsilun(ref_sc->device->lun, (struct scsi_lun *) scsi_lun);
420 tmfabort_wqe->lun[0] = be32_to_cpu(scsi_lun[0]);
421 tmfabort_wqe->lun[1] = be32_to_cpu(scsi_lun[1]);
422
423 if (ref_sc->sc_data_direction == DMA_TO_DEVICE)
424 dword = (ISCSI_TASK_TYPE_WRITE << ISCSI_CMD_REQUEST_TYPE_SHIFT);
425 else
426 dword = (ISCSI_TASK_TYPE_READ << ISCSI_CMD_REQUEST_TYPE_SHIFT);
427 tmfabort_wqe->ref_itt = (dword | (tmfabort_hdr->rtt & ISCSI_ITT_MASK));
428 tmfabort_wqe->ref_cmd_sn = be32_to_cpu(tmfabort_hdr->refcmdsn);
429
430 tmfabort_wqe->bd_list_addr_lo = (u32) bnx2i_conn->hba->mp_bd_dma;
431 tmfabort_wqe->bd_list_addr_hi = (u32)
432 ((u64) bnx2i_conn->hba->mp_bd_dma >> 32);
433 tmfabort_wqe->num_bds = 1;
434 tmfabort_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
435
436 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
437 return 0;
438 }
439
440 /**
441 * bnx2i_send_iscsi_scsicmd - post iSCSI scsicmd request WQE to hardware
442 * @conn: iscsi connection
443 * @cmd: driver command structure which is requesting
444 * a WQE to sent to chip for further processing
445 *
446 * prepare and post an iSCSI SCSI-CMD request WQE to CNIC firmware
447 */
448 int bnx2i_send_iscsi_scsicmd(struct bnx2i_conn *bnx2i_conn,
449 struct bnx2i_cmd *cmd)
450 {
451 struct bnx2i_cmd_request *scsi_cmd_wqe;
452
453 scsi_cmd_wqe = (struct bnx2i_cmd_request *)
454 bnx2i_conn->ep->qp.sq_prod_qe;
455 memcpy(scsi_cmd_wqe, &cmd->req, sizeof(struct bnx2i_cmd_request));
456 scsi_cmd_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
457
458 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
459 return 0;
460 }
461
462 /**
463 * bnx2i_send_iscsi_nopout - post iSCSI NOPOUT request WQE to hardware
464 * @conn: iscsi connection
465 * @cmd: driver command structure which is requesting
466 * a WQE to sent to chip for further processing
467 * @ttt: TTT to be used when building pdu header
468 * @datap: payload buffer pointer
469 * @data_len: payload data length
470 * @unsol: indicated whether nopout pdu is unsolicited pdu or
471 * in response to target's NOPIN w/ TTT != FFFFFFFF
472 *
473 * prepare and post a nopout request WQE to CNIC firmware
474 */
475 int bnx2i_send_iscsi_nopout(struct bnx2i_conn *bnx2i_conn,
476 struct iscsi_task *task, u32 ttt,
477 char *datap, int data_len, int unsol)
478 {
479 struct bnx2i_endpoint *ep = bnx2i_conn->ep;
480 struct bnx2i_cmd *bnx2i_cmd;
481 struct bnx2i_nop_out_request *nopout_wqe;
482 struct iscsi_nopout *nopout_hdr;
483
484 bnx2i_cmd = (struct bnx2i_cmd *)task->dd_data;
485 nopout_hdr = (struct iscsi_nopout *)task->hdr;
486 nopout_wqe = (struct bnx2i_nop_out_request *)ep->qp.sq_prod_qe;
487 nopout_wqe->op_code = nopout_hdr->opcode;
488 nopout_wqe->op_attr = ISCSI_FLAG_CMD_FINAL;
489 memcpy(nopout_wqe->lun, nopout_hdr->lun, 8);
490
491 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
492 u32 tmp = nopout_hdr->lun[0];
493 /* 57710 requires LUN field to be swapped */
494 nopout_hdr->lun[0] = nopout_hdr->lun[1];
495 nopout_hdr->lun[1] = tmp;
496 }
497
498 nopout_wqe->itt = ((u16)task->itt |
499 (ISCSI_TASK_TYPE_MPATH <<
500 ISCSI_TMF_REQUEST_TYPE_SHIFT));
501 nopout_wqe->ttt = ttt;
502 nopout_wqe->flags = 0;
503 if (!unsol)
504 nopout_wqe->flags = ISCSI_NOP_OUT_REQUEST_LOCAL_COMPLETION;
505 else if (nopout_hdr->itt == RESERVED_ITT)
506 nopout_wqe->flags = ISCSI_NOP_OUT_REQUEST_LOCAL_COMPLETION;
507
508 nopout_wqe->cmd_sn = be32_to_cpu(nopout_hdr->cmdsn);
509 nopout_wqe->data_length = data_len;
510 if (data_len) {
511 /* handle payload data, not required in first release */
512 printk(KERN_ALERT "NOPOUT: WARNING!! payload len != 0\n");
513 } else {
514 nopout_wqe->bd_list_addr_lo = (u32)
515 bnx2i_conn->hba->mp_bd_dma;
516 nopout_wqe->bd_list_addr_hi =
517 (u32) ((u64) bnx2i_conn->hba->mp_bd_dma >> 32);
518 nopout_wqe->num_bds = 1;
519 }
520 nopout_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
521
522 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
523 return 0;
524 }
525
526
527 /**
528 * bnx2i_send_iscsi_logout - post iSCSI logout request WQE to hardware
529 * @conn: iscsi connection
530 * @cmd: driver command structure which is requesting
531 * a WQE to sent to chip for further processing
532 *
533 * prepare and post logout request WQE to CNIC firmware
534 */
535 int bnx2i_send_iscsi_logout(struct bnx2i_conn *bnx2i_conn,
536 struct iscsi_task *task)
537 {
538 struct bnx2i_cmd *bnx2i_cmd;
539 struct bnx2i_logout_request *logout_wqe;
540 struct iscsi_logout *logout_hdr;
541
542 bnx2i_cmd = (struct bnx2i_cmd *)task->dd_data;
543 logout_hdr = (struct iscsi_logout *)task->hdr;
544
545 logout_wqe = (struct bnx2i_logout_request *)
546 bnx2i_conn->ep->qp.sq_prod_qe;
547 memset(logout_wqe, 0x00, sizeof(struct bnx2i_logout_request));
548
549 logout_wqe->op_code = logout_hdr->opcode;
550 logout_wqe->cmd_sn = be32_to_cpu(logout_hdr->cmdsn);
551 logout_wqe->op_attr =
552 logout_hdr->flags | ISCSI_LOGOUT_REQUEST_ALWAYS_ONE;
553 logout_wqe->itt = ((u16)task->itt |
554 (ISCSI_TASK_TYPE_MPATH <<
555 ISCSI_LOGOUT_REQUEST_TYPE_SHIFT));
556 logout_wqe->data_length = 0;
557 logout_wqe->cid = 0;
558
559 logout_wqe->bd_list_addr_lo = (u32) bnx2i_conn->hba->mp_bd_dma;
560 logout_wqe->bd_list_addr_hi = (u32)
561 ((u64) bnx2i_conn->hba->mp_bd_dma >> 32);
562 logout_wqe->num_bds = 1;
563 logout_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
564
565 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
566 return 0;
567 }
568
569
570 /**
571 * bnx2i_update_iscsi_conn - post iSCSI logout request WQE to hardware
572 * @conn: iscsi connection which requires iscsi parameter update
573 *
574 * sends down iSCSI Conn Update request to move iSCSI conn to FFP
575 */
576 void bnx2i_update_iscsi_conn(struct iscsi_conn *conn)
577 {
578 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
579 struct bnx2i_hba *hba = bnx2i_conn->hba;
580 struct kwqe *kwqe_arr[2];
581 struct iscsi_kwqe_conn_update *update_wqe;
582 struct iscsi_kwqe_conn_update conn_update_kwqe;
583
584 update_wqe = &conn_update_kwqe;
585
586 update_wqe->hdr.op_code = ISCSI_KWQE_OPCODE_UPDATE_CONN;
587 update_wqe->hdr.flags =
588 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
589
590 /* 5771x requires conn context id to be passed as is */
591 if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_conn->ep->hba->cnic_dev_type))
592 update_wqe->context_id = bnx2i_conn->ep->ep_cid;
593 else
594 update_wqe->context_id = (bnx2i_conn->ep->ep_cid >> 7);
595 update_wqe->conn_flags = 0;
596 if (conn->hdrdgst_en)
597 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_HEADER_DIGEST;
598 if (conn->datadgst_en)
599 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_DATA_DIGEST;
600 if (conn->session->initial_r2t_en)
601 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_INITIAL_R2T;
602 if (conn->session->imm_data_en)
603 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_IMMEDIATE_DATA;
604
605 update_wqe->max_send_pdu_length = conn->max_xmit_dlength;
606 update_wqe->max_recv_pdu_length = conn->max_recv_dlength;
607 update_wqe->first_burst_length = conn->session->first_burst;
608 update_wqe->max_burst_length = conn->session->max_burst;
609 update_wqe->exp_stat_sn = conn->exp_statsn;
610 update_wqe->max_outstanding_r2ts = conn->session->max_r2t;
611 update_wqe->session_error_recovery_level = conn->session->erl;
612 iscsi_conn_printk(KERN_ALERT, conn,
613 "bnx2i: conn update - MBL 0x%x FBL 0x%x"
614 "MRDSL_I 0x%x MRDSL_T 0x%x \n",
615 update_wqe->max_burst_length,
616 update_wqe->first_burst_length,
617 update_wqe->max_recv_pdu_length,
618 update_wqe->max_send_pdu_length);
619
620 kwqe_arr[0] = (struct kwqe *) update_wqe;
621 if (hba->cnic && hba->cnic->submit_kwqes)
622 hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 1);
623 }
624
625
626 /**
627 * bnx2i_ep_ofld_timer - post iSCSI logout request WQE to hardware
628 * @data: endpoint (transport handle) structure pointer
629 *
630 * routine to handle connection offload/destroy request timeout
631 */
632 void bnx2i_ep_ofld_timer(unsigned long data)
633 {
634 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) data;
635
636 if (ep->state == EP_STATE_OFLD_START) {
637 printk(KERN_ALERT "ofld_timer: CONN_OFLD timeout\n");
638 ep->state = EP_STATE_OFLD_FAILED;
639 } else if (ep->state == EP_STATE_DISCONN_START) {
640 printk(KERN_ALERT "ofld_timer: CONN_DISCON timeout\n");
641 ep->state = EP_STATE_DISCONN_TIMEDOUT;
642 } else if (ep->state == EP_STATE_CLEANUP_START) {
643 printk(KERN_ALERT "ofld_timer: CONN_CLEANUP timeout\n");
644 ep->state = EP_STATE_CLEANUP_FAILED;
645 }
646
647 wake_up_interruptible(&ep->ofld_wait);
648 }
649
650
651 static int bnx2i_power_of2(u32 val)
652 {
653 u32 power = 0;
654 if (val & (val - 1))
655 return power;
656 val--;
657 while (val) {
658 val = val >> 1;
659 power++;
660 }
661 return power;
662 }
663
664
665 /**
666 * bnx2i_send_cmd_cleanup_req - send iscsi cmd context clean-up request
667 * @hba: adapter structure pointer
668 * @cmd: driver command structure which is requesting
669 * a WQE to sent to chip for further processing
670 *
671 * prepares and posts CONN_OFLD_REQ1/2 KWQE
672 */
673 void bnx2i_send_cmd_cleanup_req(struct bnx2i_hba *hba, struct bnx2i_cmd *cmd)
674 {
675 struct bnx2i_cleanup_request *cmd_cleanup;
676
677 cmd_cleanup =
678 (struct bnx2i_cleanup_request *)cmd->conn->ep->qp.sq_prod_qe;
679 memset(cmd_cleanup, 0x00, sizeof(struct bnx2i_cleanup_request));
680
681 cmd_cleanup->op_code = ISCSI_OPCODE_CLEANUP_REQUEST;
682 cmd_cleanup->itt = cmd->req.itt;
683 cmd_cleanup->cq_index = 0; /* CQ# used for completion, 5771x only */
684
685 bnx2i_ring_dbell_update_sq_params(cmd->conn, 1);
686 }
687
688
689 /**
690 * bnx2i_send_conn_destroy - initiates iscsi connection teardown process
691 * @hba: adapter structure pointer
692 * @ep: endpoint (transport indentifier) structure
693 *
694 * this routine prepares and posts CONN_OFLD_REQ1/2 KWQE to initiate
695 * iscsi connection context clean-up process
696 */
697 void bnx2i_send_conn_destroy(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
698 {
699 struct kwqe *kwqe_arr[2];
700 struct iscsi_kwqe_conn_destroy conn_cleanup;
701
702 memset(&conn_cleanup, 0x00, sizeof(struct iscsi_kwqe_conn_destroy));
703
704 conn_cleanup.hdr.op_code = ISCSI_KWQE_OPCODE_DESTROY_CONN;
705 conn_cleanup.hdr.flags =
706 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
707 /* 5771x requires conn context id to be passed as is */
708 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
709 conn_cleanup.context_id = ep->ep_cid;
710 else
711 conn_cleanup.context_id = (ep->ep_cid >> 7);
712
713 conn_cleanup.reserved0 = (u16)ep->ep_iscsi_cid;
714
715 kwqe_arr[0] = (struct kwqe *) &conn_cleanup;
716 if (hba->cnic && hba->cnic->submit_kwqes)
717 hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 1);
718 }
719
720
721 /**
722 * bnx2i_570x_send_conn_ofld_req - initiates iscsi conn context setup process
723 * @hba: adapter structure pointer
724 * @ep: endpoint (transport indentifier) structure
725 *
726 * 5706/5708/5709 specific - prepares and posts CONN_OFLD_REQ1/2 KWQE
727 */
728 static void bnx2i_570x_send_conn_ofld_req(struct bnx2i_hba *hba,
729 struct bnx2i_endpoint *ep)
730 {
731 struct kwqe *kwqe_arr[2];
732 struct iscsi_kwqe_conn_offload1 ofld_req1;
733 struct iscsi_kwqe_conn_offload2 ofld_req2;
734 dma_addr_t dma_addr;
735 int num_kwqes = 2;
736 u32 *ptbl;
737
738 ofld_req1.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN1;
739 ofld_req1.hdr.flags =
740 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
741
742 ofld_req1.iscsi_conn_id = (u16) ep->ep_iscsi_cid;
743
744 dma_addr = ep->qp.sq_pgtbl_phys;
745 ofld_req1.sq_page_table_addr_lo = (u32) dma_addr;
746 ofld_req1.sq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
747
748 dma_addr = ep->qp.cq_pgtbl_phys;
749 ofld_req1.cq_page_table_addr_lo = (u32) dma_addr;
750 ofld_req1.cq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
751
752 ofld_req2.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN2;
753 ofld_req2.hdr.flags =
754 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
755
756 dma_addr = ep->qp.rq_pgtbl_phys;
757 ofld_req2.rq_page_table_addr_lo = (u32) dma_addr;
758 ofld_req2.rq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
759
760 ptbl = (u32 *) ep->qp.sq_pgtbl_virt;
761
762 ofld_req2.sq_first_pte.hi = *ptbl++;
763 ofld_req2.sq_first_pte.lo = *ptbl;
764
765 ptbl = (u32 *) ep->qp.cq_pgtbl_virt;
766 ofld_req2.cq_first_pte.hi = *ptbl++;
767 ofld_req2.cq_first_pte.lo = *ptbl;
768
769 kwqe_arr[0] = (struct kwqe *) &ofld_req1;
770 kwqe_arr[1] = (struct kwqe *) &ofld_req2;
771 ofld_req2.num_additional_wqes = 0;
772
773 if (hba->cnic && hba->cnic->submit_kwqes)
774 hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, num_kwqes);
775 }
776
777
778 /**
779 * bnx2i_5771x_send_conn_ofld_req - initiates iscsi connection context creation
780 * @hba: adapter structure pointer
781 * @ep: endpoint (transport indentifier) structure
782 *
783 * 57710 specific - prepares and posts CONN_OFLD_REQ1/2 KWQE
784 */
785 static void bnx2i_5771x_send_conn_ofld_req(struct bnx2i_hba *hba,
786 struct bnx2i_endpoint *ep)
787 {
788 struct kwqe *kwqe_arr[5];
789 struct iscsi_kwqe_conn_offload1 ofld_req1;
790 struct iscsi_kwqe_conn_offload2 ofld_req2;
791 struct iscsi_kwqe_conn_offload3 ofld_req3[1];
792 dma_addr_t dma_addr;
793 int num_kwqes = 2;
794 u32 *ptbl;
795
796 ofld_req1.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN1;
797 ofld_req1.hdr.flags =
798 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
799
800 ofld_req1.iscsi_conn_id = (u16) ep->ep_iscsi_cid;
801
802 dma_addr = ep->qp.sq_pgtbl_phys + ISCSI_SQ_DB_SIZE;
803 ofld_req1.sq_page_table_addr_lo = (u32) dma_addr;
804 ofld_req1.sq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
805
806 dma_addr = ep->qp.cq_pgtbl_phys + ISCSI_CQ_DB_SIZE;
807 ofld_req1.cq_page_table_addr_lo = (u32) dma_addr;
808 ofld_req1.cq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
809
810 ofld_req2.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN2;
811 ofld_req2.hdr.flags =
812 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
813
814 dma_addr = ep->qp.rq_pgtbl_phys + ISCSI_RQ_DB_SIZE;
815 ofld_req2.rq_page_table_addr_lo = (u32) dma_addr;
816 ofld_req2.rq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
817
818 ptbl = (u32 *)((u8 *)ep->qp.sq_pgtbl_virt + ISCSI_SQ_DB_SIZE);
819 ofld_req2.sq_first_pte.hi = *ptbl++;
820 ofld_req2.sq_first_pte.lo = *ptbl;
821
822 ptbl = (u32 *)((u8 *)ep->qp.cq_pgtbl_virt + ISCSI_CQ_DB_SIZE);
823 ofld_req2.cq_first_pte.hi = *ptbl++;
824 ofld_req2.cq_first_pte.lo = *ptbl;
825
826 kwqe_arr[0] = (struct kwqe *) &ofld_req1;
827 kwqe_arr[1] = (struct kwqe *) &ofld_req2;
828
829 ofld_req2.num_additional_wqes = 1;
830 memset(ofld_req3, 0x00, sizeof(ofld_req3[0]));
831 ptbl = (u32 *)((u8 *)ep->qp.rq_pgtbl_virt + ISCSI_RQ_DB_SIZE);
832 ofld_req3[0].qp_first_pte[0].hi = *ptbl++;
833 ofld_req3[0].qp_first_pte[0].lo = *ptbl;
834
835 kwqe_arr[2] = (struct kwqe *) ofld_req3;
836 /* need if we decide to go with multiple KCQE's per conn */
837 num_kwqes += 1;
838
839 if (hba->cnic && hba->cnic->submit_kwqes)
840 hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, num_kwqes);
841 }
842
843 /**
844 * bnx2i_send_conn_ofld_req - initiates iscsi connection context setup process
845 *
846 * @hba: adapter structure pointer
847 * @ep: endpoint (transport indentifier) structure
848 *
849 * this routine prepares and posts CONN_OFLD_REQ1/2 KWQE
850 */
851 void bnx2i_send_conn_ofld_req(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
852 {
853 if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type))
854 bnx2i_5771x_send_conn_ofld_req(hba, ep);
855 else
856 bnx2i_570x_send_conn_ofld_req(hba, ep);
857 }
858
859
860 /**
861 * setup_qp_page_tables - iscsi QP page table setup function
862 * @ep: endpoint (transport indentifier) structure
863 *
864 * Sets up page tables for SQ/RQ/CQ, 1G/sec (5706/5708/5709) devices requires
865 * 64-bit address in big endian format. Whereas 10G/sec (57710) requires
866 * PT in little endian format
867 */
868 static void setup_qp_page_tables(struct bnx2i_endpoint *ep)
869 {
870 int num_pages;
871 u32 *ptbl;
872 dma_addr_t page;
873 int cnic_dev_10g;
874
875 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
876 cnic_dev_10g = 1;
877 else
878 cnic_dev_10g = 0;
879
880 /* SQ page table */
881 memset(ep->qp.sq_pgtbl_virt, 0, ep->qp.sq_pgtbl_size);
882 num_pages = ep->qp.sq_mem_size / PAGE_SIZE;
883 page = ep->qp.sq_phys;
884
885 if (cnic_dev_10g)
886 ptbl = (u32 *)((u8 *)ep->qp.sq_pgtbl_virt + ISCSI_SQ_DB_SIZE);
887 else
888 ptbl = (u32 *) ep->qp.sq_pgtbl_virt;
889 while (num_pages--) {
890 if (cnic_dev_10g) {
891 /* PTE is written in little endian format for 57710 */
892 *ptbl = (u32) page;
893 ptbl++;
894 *ptbl = (u32) ((u64) page >> 32);
895 ptbl++;
896 page += PAGE_SIZE;
897 } else {
898 /* PTE is written in big endian format for
899 * 5706/5708/5709 devices */
900 *ptbl = (u32) ((u64) page >> 32);
901 ptbl++;
902 *ptbl = (u32) page;
903 ptbl++;
904 page += PAGE_SIZE;
905 }
906 }
907
908 /* RQ page table */
909 memset(ep->qp.rq_pgtbl_virt, 0, ep->qp.rq_pgtbl_size);
910 num_pages = ep->qp.rq_mem_size / PAGE_SIZE;
911 page = ep->qp.rq_phys;
912
913 if (cnic_dev_10g)
914 ptbl = (u32 *)((u8 *)ep->qp.rq_pgtbl_virt + ISCSI_RQ_DB_SIZE);
915 else
916 ptbl = (u32 *) ep->qp.rq_pgtbl_virt;
917 while (num_pages--) {
918 if (cnic_dev_10g) {
919 /* PTE is written in little endian format for 57710 */
920 *ptbl = (u32) page;
921 ptbl++;
922 *ptbl = (u32) ((u64) page >> 32);
923 ptbl++;
924 page += PAGE_SIZE;
925 } else {
926 /* PTE is written in big endian format for
927 * 5706/5708/5709 devices */
928 *ptbl = (u32) ((u64) page >> 32);
929 ptbl++;
930 *ptbl = (u32) page;
931 ptbl++;
932 page += PAGE_SIZE;
933 }
934 }
935
936 /* CQ page table */
937 memset(ep->qp.cq_pgtbl_virt, 0, ep->qp.cq_pgtbl_size);
938 num_pages = ep->qp.cq_mem_size / PAGE_SIZE;
939 page = ep->qp.cq_phys;
940
941 if (cnic_dev_10g)
942 ptbl = (u32 *)((u8 *)ep->qp.cq_pgtbl_virt + ISCSI_CQ_DB_SIZE);
943 else
944 ptbl = (u32 *) ep->qp.cq_pgtbl_virt;
945 while (num_pages--) {
946 if (cnic_dev_10g) {
947 /* PTE is written in little endian format for 57710 */
948 *ptbl = (u32) page;
949 ptbl++;
950 *ptbl = (u32) ((u64) page >> 32);
951 ptbl++;
952 page += PAGE_SIZE;
953 } else {
954 /* PTE is written in big endian format for
955 * 5706/5708/5709 devices */
956 *ptbl = (u32) ((u64) page >> 32);
957 ptbl++;
958 *ptbl = (u32) page;
959 ptbl++;
960 page += PAGE_SIZE;
961 }
962 }
963 }
964
965
966 /**
967 * bnx2i_alloc_qp_resc - allocates required resources for QP.
968 * @hba: adapter structure pointer
969 * @ep: endpoint (transport indentifier) structure
970 *
971 * Allocate QP (transport layer for iSCSI connection) resources, DMA'able
972 * memory for SQ/RQ/CQ and page tables. EP structure elements such
973 * as producer/consumer indexes/pointers, queue sizes and page table
974 * contents are setup
975 */
976 int bnx2i_alloc_qp_resc(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
977 {
978 struct bnx2i_5771x_cq_db *cq_db;
979
980 ep->hba = hba;
981 ep->conn = NULL;
982 ep->ep_cid = ep->ep_iscsi_cid = ep->ep_pg_cid = 0;
983
984 /* Allocate page table memory for SQ which is page aligned */
985 ep->qp.sq_mem_size = hba->max_sqes * BNX2I_SQ_WQE_SIZE;
986 ep->qp.sq_mem_size =
987 (ep->qp.sq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
988 ep->qp.sq_pgtbl_size =
989 (ep->qp.sq_mem_size / PAGE_SIZE) * sizeof(void *);
990 ep->qp.sq_pgtbl_size =
991 (ep->qp.sq_pgtbl_size + (PAGE_SIZE - 1)) & PAGE_MASK;
992
993 ep->qp.sq_pgtbl_virt =
994 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.sq_pgtbl_size,
995 &ep->qp.sq_pgtbl_phys, GFP_KERNEL);
996 if (!ep->qp.sq_pgtbl_virt) {
997 printk(KERN_ALERT "bnx2i: unable to alloc SQ PT mem (%d)\n",
998 ep->qp.sq_pgtbl_size);
999 goto mem_alloc_err;
1000 }
1001
1002 /* Allocate memory area for actual SQ element */
1003 ep->qp.sq_virt =
1004 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.sq_mem_size,
1005 &ep->qp.sq_phys, GFP_KERNEL);
1006 if (!ep->qp.sq_virt) {
1007 printk(KERN_ALERT "bnx2i: unable to alloc SQ BD memory %d\n",
1008 ep->qp.sq_mem_size);
1009 goto mem_alloc_err;
1010 }
1011
1012 memset(ep->qp.sq_virt, 0x00, ep->qp.sq_mem_size);
1013 ep->qp.sq_first_qe = ep->qp.sq_virt;
1014 ep->qp.sq_prod_qe = ep->qp.sq_first_qe;
1015 ep->qp.sq_cons_qe = ep->qp.sq_first_qe;
1016 ep->qp.sq_last_qe = &ep->qp.sq_first_qe[hba->max_sqes - 1];
1017 ep->qp.sq_prod_idx = 0;
1018 ep->qp.sq_cons_idx = 0;
1019 ep->qp.sqe_left = hba->max_sqes;
1020
1021 /* Allocate page table memory for CQ which is page aligned */
1022 ep->qp.cq_mem_size = hba->max_cqes * BNX2I_CQE_SIZE;
1023 ep->qp.cq_mem_size =
1024 (ep->qp.cq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
1025 ep->qp.cq_pgtbl_size =
1026 (ep->qp.cq_mem_size / PAGE_SIZE) * sizeof(void *);
1027 ep->qp.cq_pgtbl_size =
1028 (ep->qp.cq_pgtbl_size + (PAGE_SIZE - 1)) & PAGE_MASK;
1029
1030 ep->qp.cq_pgtbl_virt =
1031 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.cq_pgtbl_size,
1032 &ep->qp.cq_pgtbl_phys, GFP_KERNEL);
1033 if (!ep->qp.cq_pgtbl_virt) {
1034 printk(KERN_ALERT "bnx2i: unable to alloc CQ PT memory %d\n",
1035 ep->qp.cq_pgtbl_size);
1036 goto mem_alloc_err;
1037 }
1038
1039 /* Allocate memory area for actual CQ element */
1040 ep->qp.cq_virt =
1041 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.cq_mem_size,
1042 &ep->qp.cq_phys, GFP_KERNEL);
1043 if (!ep->qp.cq_virt) {
1044 printk(KERN_ALERT "bnx2i: unable to alloc CQ BD memory %d\n",
1045 ep->qp.cq_mem_size);
1046 goto mem_alloc_err;
1047 }
1048 memset(ep->qp.cq_virt, 0x00, ep->qp.cq_mem_size);
1049
1050 ep->qp.cq_first_qe = ep->qp.cq_virt;
1051 ep->qp.cq_prod_qe = ep->qp.cq_first_qe;
1052 ep->qp.cq_cons_qe = ep->qp.cq_first_qe;
1053 ep->qp.cq_last_qe = &ep->qp.cq_first_qe[hba->max_cqes - 1];
1054 ep->qp.cq_prod_idx = 0;
1055 ep->qp.cq_cons_idx = 0;
1056 ep->qp.cqe_left = hba->max_cqes;
1057 ep->qp.cqe_exp_seq_sn = ISCSI_INITIAL_SN;
1058 ep->qp.cqe_size = hba->max_cqes;
1059
1060 /* Invalidate all EQ CQE index, req only for 57710 */
1061 cq_db = (struct bnx2i_5771x_cq_db *) ep->qp.cq_pgtbl_virt;
1062 memset(cq_db->sqn, 0xFF, sizeof(cq_db->sqn[0]) * BNX2X_MAX_CQS);
1063
1064 /* Allocate page table memory for RQ which is page aligned */
1065 ep->qp.rq_mem_size = hba->max_rqes * BNX2I_RQ_WQE_SIZE;
1066 ep->qp.rq_mem_size =
1067 (ep->qp.rq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
1068 ep->qp.rq_pgtbl_size =
1069 (ep->qp.rq_mem_size / PAGE_SIZE) * sizeof(void *);
1070 ep->qp.rq_pgtbl_size =
1071 (ep->qp.rq_pgtbl_size + (PAGE_SIZE - 1)) & PAGE_MASK;
1072
1073 ep->qp.rq_pgtbl_virt =
1074 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.rq_pgtbl_size,
1075 &ep->qp.rq_pgtbl_phys, GFP_KERNEL);
1076 if (!ep->qp.rq_pgtbl_virt) {
1077 printk(KERN_ALERT "bnx2i: unable to alloc RQ PT mem %d\n",
1078 ep->qp.rq_pgtbl_size);
1079 goto mem_alloc_err;
1080 }
1081
1082 /* Allocate memory area for actual RQ element */
1083 ep->qp.rq_virt =
1084 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.rq_mem_size,
1085 &ep->qp.rq_phys, GFP_KERNEL);
1086 if (!ep->qp.rq_virt) {
1087 printk(KERN_ALERT "bnx2i: unable to alloc RQ BD memory %d\n",
1088 ep->qp.rq_mem_size);
1089 goto mem_alloc_err;
1090 }
1091
1092 ep->qp.rq_first_qe = ep->qp.rq_virt;
1093 ep->qp.rq_prod_qe = ep->qp.rq_first_qe;
1094 ep->qp.rq_cons_qe = ep->qp.rq_first_qe;
1095 ep->qp.rq_last_qe = &ep->qp.rq_first_qe[hba->max_rqes - 1];
1096 ep->qp.rq_prod_idx = 0x8000;
1097 ep->qp.rq_cons_idx = 0;
1098 ep->qp.rqe_left = hba->max_rqes;
1099
1100 setup_qp_page_tables(ep);
1101
1102 return 0;
1103
1104 mem_alloc_err:
1105 bnx2i_free_qp_resc(hba, ep);
1106 return -ENOMEM;
1107 }
1108
1109
1110
1111 /**
1112 * bnx2i_free_qp_resc - free memory resources held by QP
1113 * @hba: adapter structure pointer
1114 * @ep: endpoint (transport indentifier) structure
1115 *
1116 * Free QP resources - SQ/RQ/CQ memory and page tables.
1117 */
1118 void bnx2i_free_qp_resc(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
1119 {
1120 if (ep->qp.ctx_base) {
1121 iounmap(ep->qp.ctx_base);
1122 ep->qp.ctx_base = NULL;
1123 }
1124 /* Free SQ mem */
1125 if (ep->qp.sq_pgtbl_virt) {
1126 dma_free_coherent(&hba->pcidev->dev, ep->qp.sq_pgtbl_size,
1127 ep->qp.sq_pgtbl_virt, ep->qp.sq_pgtbl_phys);
1128 ep->qp.sq_pgtbl_virt = NULL;
1129 ep->qp.sq_pgtbl_phys = 0;
1130 }
1131 if (ep->qp.sq_virt) {
1132 dma_free_coherent(&hba->pcidev->dev, ep->qp.sq_mem_size,
1133 ep->qp.sq_virt, ep->qp.sq_phys);
1134 ep->qp.sq_virt = NULL;
1135 ep->qp.sq_phys = 0;
1136 }
1137
1138 /* Free RQ mem */
1139 if (ep->qp.rq_pgtbl_virt) {
1140 dma_free_coherent(&hba->pcidev->dev, ep->qp.rq_pgtbl_size,
1141 ep->qp.rq_pgtbl_virt, ep->qp.rq_pgtbl_phys);
1142 ep->qp.rq_pgtbl_virt = NULL;
1143 ep->qp.rq_pgtbl_phys = 0;
1144 }
1145 if (ep->qp.rq_virt) {
1146 dma_free_coherent(&hba->pcidev->dev, ep->qp.rq_mem_size,
1147 ep->qp.rq_virt, ep->qp.rq_phys);
1148 ep->qp.rq_virt = NULL;
1149 ep->qp.rq_phys = 0;
1150 }
1151
1152 /* Free CQ mem */
1153 if (ep->qp.cq_pgtbl_virt) {
1154 dma_free_coherent(&hba->pcidev->dev, ep->qp.cq_pgtbl_size,
1155 ep->qp.cq_pgtbl_virt, ep->qp.cq_pgtbl_phys);
1156 ep->qp.cq_pgtbl_virt = NULL;
1157 ep->qp.cq_pgtbl_phys = 0;
1158 }
1159 if (ep->qp.cq_virt) {
1160 dma_free_coherent(&hba->pcidev->dev, ep->qp.cq_mem_size,
1161 ep->qp.cq_virt, ep->qp.cq_phys);
1162 ep->qp.cq_virt = NULL;
1163 ep->qp.cq_phys = 0;
1164 }
1165 }
1166
1167
1168 /**
1169 * bnx2i_send_fw_iscsi_init_msg - initiates initial handshake with iscsi f/w
1170 * @hba: adapter structure pointer
1171 *
1172 * Send down iscsi_init KWQEs which initiates the initial handshake with the f/w
1173 * This results in iSCSi support validation and on-chip context manager
1174 * initialization. Firmware completes this handshake with a CQE carrying
1175 * the result of iscsi support validation. Parameter carried by
1176 * iscsi init request determines the number of offloaded connection and
1177 * tolerance level for iscsi protocol violation this hba/chip can support
1178 */
1179 int bnx2i_send_fw_iscsi_init_msg(struct bnx2i_hba *hba)
1180 {
1181 struct kwqe *kwqe_arr[3];
1182 struct iscsi_kwqe_init1 iscsi_init;
1183 struct iscsi_kwqe_init2 iscsi_init2;
1184 int rc = 0;
1185 u64 mask64;
1186
1187 bnx2i_adjust_qp_size(hba);
1188
1189 iscsi_init.flags =
1190 ISCSI_PAGE_SIZE_4K << ISCSI_KWQE_INIT1_PAGE_SIZE_SHIFT;
1191 if (en_tcp_dack)
1192 iscsi_init.flags |= ISCSI_KWQE_INIT1_DELAYED_ACK_ENABLE;
1193 iscsi_init.reserved0 = 0;
1194 iscsi_init.num_cqs = 1;
1195 iscsi_init.hdr.op_code = ISCSI_KWQE_OPCODE_INIT1;
1196 iscsi_init.hdr.flags =
1197 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
1198
1199 iscsi_init.dummy_buffer_addr_lo = (u32) hba->dummy_buf_dma;
1200 iscsi_init.dummy_buffer_addr_hi =
1201 (u32) ((u64) hba->dummy_buf_dma >> 32);
1202
1203 hba->ctx_ccell_tasks =
1204 ((hba->num_ccell & 0xFFFF) | (hba->max_sqes << 16));
1205 iscsi_init.num_ccells_per_conn = hba->num_ccell;
1206 iscsi_init.num_tasks_per_conn = hba->max_sqes;
1207 iscsi_init.sq_wqes_per_page = PAGE_SIZE / BNX2I_SQ_WQE_SIZE;
1208 iscsi_init.sq_num_wqes = hba->max_sqes;
1209 iscsi_init.cq_log_wqes_per_page =
1210 (u8) bnx2i_power_of2(PAGE_SIZE / BNX2I_CQE_SIZE);
1211 iscsi_init.cq_num_wqes = hba->max_cqes;
1212 iscsi_init.cq_num_pages = (hba->max_cqes * BNX2I_CQE_SIZE +
1213 (PAGE_SIZE - 1)) / PAGE_SIZE;
1214 iscsi_init.sq_num_pages = (hba->max_sqes * BNX2I_SQ_WQE_SIZE +
1215 (PAGE_SIZE - 1)) / PAGE_SIZE;
1216 iscsi_init.rq_buffer_size = BNX2I_RQ_WQE_SIZE;
1217 iscsi_init.rq_num_wqes = hba->max_rqes;
1218
1219
1220 iscsi_init2.hdr.op_code = ISCSI_KWQE_OPCODE_INIT2;
1221 iscsi_init2.hdr.flags =
1222 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
1223 iscsi_init2.max_cq_sqn = hba->max_cqes * 2 + 1;
1224 mask64 = 0x0ULL;
1225 mask64 |= (
1226 /* CISCO MDS */
1227 (1UL <<
1228 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_NOT_RSRV) |
1229 /* HP MSA1510i */
1230 (1UL <<
1231 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_EXP_DATASN) |
1232 /* EMC */
1233 (1ULL << ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_LUN));
1234 if (error_mask1)
1235 iscsi_init2.error_bit_map[0] = error_mask1;
1236 else
1237 iscsi_init2.error_bit_map[0] = (u32) mask64;
1238
1239 if (error_mask2)
1240 iscsi_init2.error_bit_map[1] = error_mask2;
1241 else
1242 iscsi_init2.error_bit_map[1] = (u32) (mask64 >> 32);
1243
1244 iscsi_error_mask = mask64;
1245
1246 kwqe_arr[0] = (struct kwqe *) &iscsi_init;
1247 kwqe_arr[1] = (struct kwqe *) &iscsi_init2;
1248
1249 if (hba->cnic && hba->cnic->submit_kwqes)
1250 rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 2);
1251 return rc;
1252 }
1253
1254
1255 /**
1256 * bnx2i_process_scsi_cmd_resp - this function handles scsi cmd completion.
1257 * @conn: iscsi connection
1258 * @cqe: pointer to newly DMA'ed CQE entry for processing
1259 *
1260 * process SCSI CMD Response CQE & complete the request to SCSI-ML
1261 */
1262 static int bnx2i_process_scsi_cmd_resp(struct iscsi_session *session,
1263 struct bnx2i_conn *bnx2i_conn,
1264 struct cqe *cqe)
1265 {
1266 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1267 struct bnx2i_cmd_response *resp_cqe;
1268 struct bnx2i_cmd *bnx2i_cmd;
1269 struct iscsi_task *task;
1270 struct iscsi_cmd_rsp *hdr;
1271 u32 datalen = 0;
1272
1273 resp_cqe = (struct bnx2i_cmd_response *)cqe;
1274 spin_lock(&session->lock);
1275 task = iscsi_itt_to_task(conn,
1276 resp_cqe->itt & ISCSI_CMD_RESPONSE_INDEX);
1277 if (!task)
1278 goto fail;
1279
1280 bnx2i_cmd = task->dd_data;
1281
1282 if (bnx2i_cmd->req.op_attr & ISCSI_CMD_REQUEST_READ) {
1283 conn->datain_pdus_cnt +=
1284 resp_cqe->task_stat.read_stat.num_data_outs;
1285 conn->rxdata_octets +=
1286 bnx2i_cmd->req.total_data_transfer_length;
1287 } else {
1288 conn->dataout_pdus_cnt +=
1289 resp_cqe->task_stat.read_stat.num_data_outs;
1290 conn->r2t_pdus_cnt +=
1291 resp_cqe->task_stat.read_stat.num_r2ts;
1292 conn->txdata_octets +=
1293 bnx2i_cmd->req.total_data_transfer_length;
1294 }
1295 bnx2i_iscsi_unmap_sg_list(bnx2i_cmd);
1296
1297 hdr = (struct iscsi_cmd_rsp *)task->hdr;
1298 resp_cqe = (struct bnx2i_cmd_response *)cqe;
1299 hdr->opcode = resp_cqe->op_code;
1300 hdr->max_cmdsn = cpu_to_be32(resp_cqe->max_cmd_sn);
1301 hdr->exp_cmdsn = cpu_to_be32(resp_cqe->exp_cmd_sn);
1302 hdr->response = resp_cqe->response;
1303 hdr->cmd_status = resp_cqe->status;
1304 hdr->flags = resp_cqe->response_flags;
1305 hdr->residual_count = cpu_to_be32(resp_cqe->residual_count);
1306
1307 if (resp_cqe->op_code == ISCSI_OP_SCSI_DATA_IN)
1308 goto done;
1309
1310 if (resp_cqe->status == SAM_STAT_CHECK_CONDITION) {
1311 datalen = resp_cqe->data_length;
1312 if (datalen < 2)
1313 goto done;
1314
1315 if (datalen > BNX2I_RQ_WQE_SIZE) {
1316 iscsi_conn_printk(KERN_ERR, conn,
1317 "sense data len %d > RQ sz\n",
1318 datalen);
1319 datalen = BNX2I_RQ_WQE_SIZE;
1320 } else if (datalen > ISCSI_DEF_MAX_RECV_SEG_LEN) {
1321 iscsi_conn_printk(KERN_ERR, conn,
1322 "sense data len %d > conn data\n",
1323 datalen);
1324 datalen = ISCSI_DEF_MAX_RECV_SEG_LEN;
1325 }
1326
1327 bnx2i_get_rq_buf(bnx2i_cmd->conn, conn->data, datalen);
1328 bnx2i_put_rq_buf(bnx2i_cmd->conn, 1);
1329 }
1330
1331 done:
1332 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr,
1333 conn->data, datalen);
1334 fail:
1335 spin_unlock(&session->lock);
1336 return 0;
1337 }
1338
1339
1340 /**
1341 * bnx2i_process_login_resp - this function handles iscsi login response
1342 * @session: iscsi session pointer
1343 * @bnx2i_conn: iscsi connection pointer
1344 * @cqe: pointer to newly DMA'ed CQE entry for processing
1345 *
1346 * process Login Response CQE & complete it to open-iscsi user daemon
1347 */
1348 static int bnx2i_process_login_resp(struct iscsi_session *session,
1349 struct bnx2i_conn *bnx2i_conn,
1350 struct cqe *cqe)
1351 {
1352 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1353 struct iscsi_task *task;
1354 struct bnx2i_login_response *login;
1355 struct iscsi_login_rsp *resp_hdr;
1356 int pld_len;
1357 int pad_len;
1358
1359 login = (struct bnx2i_login_response *) cqe;
1360 spin_lock(&session->lock);
1361 task = iscsi_itt_to_task(conn,
1362 login->itt & ISCSI_LOGIN_RESPONSE_INDEX);
1363 if (!task)
1364 goto done;
1365
1366 resp_hdr = (struct iscsi_login_rsp *) &bnx2i_conn->gen_pdu.resp_hdr;
1367 memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1368 resp_hdr->opcode = login->op_code;
1369 resp_hdr->flags = login->response_flags;
1370 resp_hdr->max_version = login->version_max;
1371 resp_hdr->active_version = login->version_active;
1372 resp_hdr->hlength = 0;
1373
1374 hton24(resp_hdr->dlength, login->data_length);
1375 memcpy(resp_hdr->isid, &login->isid_lo, 6);
1376 resp_hdr->tsih = cpu_to_be16(login->tsih);
1377 resp_hdr->itt = task->hdr->itt;
1378 resp_hdr->statsn = cpu_to_be32(login->stat_sn);
1379 resp_hdr->exp_cmdsn = cpu_to_be32(login->exp_cmd_sn);
1380 resp_hdr->max_cmdsn = cpu_to_be32(login->max_cmd_sn);
1381 resp_hdr->status_class = login->status_class;
1382 resp_hdr->status_detail = login->status_detail;
1383 pld_len = login->data_length;
1384 bnx2i_conn->gen_pdu.resp_wr_ptr =
1385 bnx2i_conn->gen_pdu.resp_buf + pld_len;
1386
1387 pad_len = 0;
1388 if (pld_len & 0x3)
1389 pad_len = 4 - (pld_len % 4);
1390
1391 if (pad_len) {
1392 int i = 0;
1393 for (i = 0; i < pad_len; i++) {
1394 bnx2i_conn->gen_pdu.resp_wr_ptr[0] = 0;
1395 bnx2i_conn->gen_pdu.resp_wr_ptr++;
1396 }
1397 }
1398
1399 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr,
1400 bnx2i_conn->gen_pdu.resp_buf,
1401 bnx2i_conn->gen_pdu.resp_wr_ptr - bnx2i_conn->gen_pdu.resp_buf);
1402 done:
1403 spin_unlock(&session->lock);
1404 return 0;
1405 }
1406
1407 /**
1408 * bnx2i_process_tmf_resp - this function handles iscsi TMF response
1409 * @session: iscsi session pointer
1410 * @bnx2i_conn: iscsi connection pointer
1411 * @cqe: pointer to newly DMA'ed CQE entry for processing
1412 *
1413 * process iSCSI TMF Response CQE and wake up the driver eh thread.
1414 */
1415 static int bnx2i_process_tmf_resp(struct iscsi_session *session,
1416 struct bnx2i_conn *bnx2i_conn,
1417 struct cqe *cqe)
1418 {
1419 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1420 struct iscsi_task *task;
1421 struct bnx2i_tmf_response *tmf_cqe;
1422 struct iscsi_tm_rsp *resp_hdr;
1423
1424 tmf_cqe = (struct bnx2i_tmf_response *)cqe;
1425 spin_lock(&session->lock);
1426 task = iscsi_itt_to_task(conn,
1427 tmf_cqe->itt & ISCSI_TMF_RESPONSE_INDEX);
1428 if (!task)
1429 goto done;
1430
1431 resp_hdr = (struct iscsi_tm_rsp *) &bnx2i_conn->gen_pdu.resp_hdr;
1432 memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1433 resp_hdr->opcode = tmf_cqe->op_code;
1434 resp_hdr->max_cmdsn = cpu_to_be32(tmf_cqe->max_cmd_sn);
1435 resp_hdr->exp_cmdsn = cpu_to_be32(tmf_cqe->exp_cmd_sn);
1436 resp_hdr->itt = task->hdr->itt;
1437 resp_hdr->response = tmf_cqe->response;
1438
1439 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0);
1440 done:
1441 spin_unlock(&session->lock);
1442 return 0;
1443 }
1444
1445 /**
1446 * bnx2i_process_logout_resp - this function handles iscsi logout response
1447 * @session: iscsi session pointer
1448 * @bnx2i_conn: iscsi connection pointer
1449 * @cqe: pointer to newly DMA'ed CQE entry for processing
1450 *
1451 * process iSCSI Logout Response CQE & make function call to
1452 * notify the user daemon.
1453 */
1454 static int bnx2i_process_logout_resp(struct iscsi_session *session,
1455 struct bnx2i_conn *bnx2i_conn,
1456 struct cqe *cqe)
1457 {
1458 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1459 struct iscsi_task *task;
1460 struct bnx2i_logout_response *logout;
1461 struct iscsi_logout_rsp *resp_hdr;
1462
1463 logout = (struct bnx2i_logout_response *) cqe;
1464 spin_lock(&session->lock);
1465 task = iscsi_itt_to_task(conn,
1466 logout->itt & ISCSI_LOGOUT_RESPONSE_INDEX);
1467 if (!task)
1468 goto done;
1469
1470 resp_hdr = (struct iscsi_logout_rsp *) &bnx2i_conn->gen_pdu.resp_hdr;
1471 memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1472 resp_hdr->opcode = logout->op_code;
1473 resp_hdr->flags = logout->response;
1474 resp_hdr->hlength = 0;
1475
1476 resp_hdr->itt = task->hdr->itt;
1477 resp_hdr->statsn = task->hdr->exp_statsn;
1478 resp_hdr->exp_cmdsn = cpu_to_be32(logout->exp_cmd_sn);
1479 resp_hdr->max_cmdsn = cpu_to_be32(logout->max_cmd_sn);
1480
1481 resp_hdr->t2wait = cpu_to_be32(logout->time_to_wait);
1482 resp_hdr->t2retain = cpu_to_be32(logout->time_to_retain);
1483
1484 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0);
1485 done:
1486 spin_unlock(&session->lock);
1487 return 0;
1488 }
1489
1490 /**
1491 * bnx2i_process_nopin_local_cmpl - this function handles iscsi nopin CQE
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 NOPIN local completion CQE, frees IIT and command structures
1497 */
1498 static void bnx2i_process_nopin_local_cmpl(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 bnx2i_nop_in_msg *nop_in;
1504 struct iscsi_task *task;
1505
1506 nop_in = (struct bnx2i_nop_in_msg *)cqe;
1507 spin_lock(&session->lock);
1508 task = iscsi_itt_to_task(conn,
1509 nop_in->itt & ISCSI_NOP_IN_MSG_INDEX);
1510 if (task)
1511 iscsi_put_task(task);
1512 spin_unlock(&session->lock);
1513 }
1514
1515 /**
1516 * bnx2i_unsol_pdu_adjust_rq - makes adjustments to RQ after unsol pdu is recvd
1517 * @conn: iscsi connection
1518 *
1519 * Firmware advances RQ producer index for every unsolicited PDU even if
1520 * payload data length is '0'. This function makes corresponding
1521 * adjustments on the driver side to match this f/w behavior
1522 */
1523 static void bnx2i_unsol_pdu_adjust_rq(struct bnx2i_conn *bnx2i_conn)
1524 {
1525 char dummy_rq_data[2];
1526 bnx2i_get_rq_buf(bnx2i_conn, dummy_rq_data, 1);
1527 bnx2i_put_rq_buf(bnx2i_conn, 1);
1528 }
1529
1530
1531 /**
1532 * bnx2i_process_nopin_mesg - this function handles iscsi nopin CQE
1533 * @session: iscsi session pointer
1534 * @bnx2i_conn: iscsi connection pointer
1535 * @cqe: pointer to newly DMA'ed CQE entry for processing
1536 *
1537 * process iSCSI target's proactive iSCSI NOPIN request
1538 */
1539 static int bnx2i_process_nopin_mesg(struct iscsi_session *session,
1540 struct bnx2i_conn *bnx2i_conn,
1541 struct cqe *cqe)
1542 {
1543 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1544 struct iscsi_task *task;
1545 struct bnx2i_nop_in_msg *nop_in;
1546 struct iscsi_nopin *hdr;
1547 u32 itt;
1548 int tgt_async_nop = 0;
1549
1550 nop_in = (struct bnx2i_nop_in_msg *)cqe;
1551 itt = nop_in->itt & ISCSI_NOP_IN_MSG_INDEX;
1552
1553 spin_lock(&session->lock);
1554 hdr = (struct iscsi_nopin *)&bnx2i_conn->gen_pdu.resp_hdr;
1555 memset(hdr, 0, sizeof(struct iscsi_hdr));
1556 hdr->opcode = nop_in->op_code;
1557 hdr->max_cmdsn = cpu_to_be32(nop_in->max_cmd_sn);
1558 hdr->exp_cmdsn = cpu_to_be32(nop_in->exp_cmd_sn);
1559 hdr->ttt = cpu_to_be32(nop_in->ttt);
1560
1561 if (itt == (u16) RESERVED_ITT) {
1562 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
1563 hdr->itt = RESERVED_ITT;
1564 tgt_async_nop = 1;
1565 goto done;
1566 }
1567
1568 /* this is a response to one of our nop-outs */
1569 task = iscsi_itt_to_task(conn, itt);
1570 if (task) {
1571 hdr->flags = ISCSI_FLAG_CMD_FINAL;
1572 hdr->itt = task->hdr->itt;
1573 hdr->ttt = cpu_to_be32(nop_in->ttt);
1574 memcpy(hdr->lun, nop_in->lun, 8);
1575 }
1576 done:
1577 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, NULL, 0);
1578 spin_unlock(&session->lock);
1579
1580 return tgt_async_nop;
1581 }
1582
1583
1584 /**
1585 * bnx2i_process_async_mesg - this function handles iscsi async message
1586 * @session: iscsi session pointer
1587 * @bnx2i_conn: iscsi connection pointer
1588 * @cqe: pointer to newly DMA'ed CQE entry for processing
1589 *
1590 * process iSCSI ASYNC Message
1591 */
1592 static void bnx2i_process_async_mesg(struct iscsi_session *session,
1593 struct bnx2i_conn *bnx2i_conn,
1594 struct cqe *cqe)
1595 {
1596 struct bnx2i_async_msg *async_cqe;
1597 struct iscsi_async *resp_hdr;
1598 u8 async_event;
1599
1600 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
1601
1602 async_cqe = (struct bnx2i_async_msg *)cqe;
1603 async_event = async_cqe->async_event;
1604
1605 if (async_event == ISCSI_ASYNC_MSG_SCSI_EVENT) {
1606 iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data,
1607 "async: scsi events not supported\n");
1608 return;
1609 }
1610
1611 spin_lock(&session->lock);
1612 resp_hdr = (struct iscsi_async *) &bnx2i_conn->gen_pdu.resp_hdr;
1613 memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1614 resp_hdr->opcode = async_cqe->op_code;
1615 resp_hdr->flags = 0x80;
1616
1617 memcpy(resp_hdr->lun, async_cqe->lun, 8);
1618 resp_hdr->exp_cmdsn = cpu_to_be32(async_cqe->exp_cmd_sn);
1619 resp_hdr->max_cmdsn = cpu_to_be32(async_cqe->max_cmd_sn);
1620
1621 resp_hdr->async_event = async_cqe->async_event;
1622 resp_hdr->async_vcode = async_cqe->async_vcode;
1623
1624 resp_hdr->param1 = cpu_to_be16(async_cqe->param1);
1625 resp_hdr->param2 = cpu_to_be16(async_cqe->param2);
1626 resp_hdr->param3 = cpu_to_be16(async_cqe->param3);
1627
1628 __iscsi_complete_pdu(bnx2i_conn->cls_conn->dd_data,
1629 (struct iscsi_hdr *)resp_hdr, NULL, 0);
1630 spin_unlock(&session->lock);
1631 }
1632
1633
1634 /**
1635 * bnx2i_process_reject_mesg - process iscsi reject pdu
1636 * @session: iscsi session pointer
1637 * @bnx2i_conn: iscsi connection pointer
1638 * @cqe: pointer to newly DMA'ed CQE entry for processing
1639 *
1640 * process iSCSI REJECT message
1641 */
1642 static void bnx2i_process_reject_mesg(struct iscsi_session *session,
1643 struct bnx2i_conn *bnx2i_conn,
1644 struct cqe *cqe)
1645 {
1646 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1647 struct bnx2i_reject_msg *reject;
1648 struct iscsi_reject *hdr;
1649
1650 reject = (struct bnx2i_reject_msg *) cqe;
1651 if (reject->data_length) {
1652 bnx2i_get_rq_buf(bnx2i_conn, conn->data, reject->data_length);
1653 bnx2i_put_rq_buf(bnx2i_conn, 1);
1654 } else
1655 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
1656
1657 spin_lock(&session->lock);
1658 hdr = (struct iscsi_reject *) &bnx2i_conn->gen_pdu.resp_hdr;
1659 memset(hdr, 0, sizeof(struct iscsi_hdr));
1660 hdr->opcode = reject->op_code;
1661 hdr->reason = reject->reason;
1662 hton24(hdr->dlength, reject->data_length);
1663 hdr->max_cmdsn = cpu_to_be32(reject->max_cmd_sn);
1664 hdr->exp_cmdsn = cpu_to_be32(reject->exp_cmd_sn);
1665 hdr->ffffffff = cpu_to_be32(RESERVED_ITT);
1666 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, conn->data,
1667 reject->data_length);
1668 spin_unlock(&session->lock);
1669 }
1670
1671 /**
1672 * bnx2i_process_cmd_cleanup_resp - process scsi command clean-up completion
1673 * @session: iscsi session pointer
1674 * @bnx2i_conn: iscsi connection pointer
1675 * @cqe: pointer to newly DMA'ed CQE entry for processing
1676 *
1677 * process command cleanup response CQE during conn shutdown or error recovery
1678 */
1679 static void bnx2i_process_cmd_cleanup_resp(struct iscsi_session *session,
1680 struct bnx2i_conn *bnx2i_conn,
1681 struct cqe *cqe)
1682 {
1683 struct bnx2i_cleanup_response *cmd_clean_rsp;
1684 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1685 struct iscsi_task *task;
1686
1687 cmd_clean_rsp = (struct bnx2i_cleanup_response *)cqe;
1688 spin_lock(&session->lock);
1689 task = iscsi_itt_to_task(conn,
1690 cmd_clean_rsp->itt & ISCSI_CLEANUP_RESPONSE_INDEX);
1691 if (!task)
1692 printk(KERN_ALERT "bnx2i: cmd clean ITT %x not active\n",
1693 cmd_clean_rsp->itt & ISCSI_CLEANUP_RESPONSE_INDEX);
1694 spin_unlock(&session->lock);
1695 complete(&bnx2i_conn->cmd_cleanup_cmpl);
1696 }
1697
1698
1699
1700 /**
1701 * bnx2i_process_new_cqes - process newly DMA'ed CQE's
1702 * @bnx2i_conn: iscsi connection
1703 *
1704 * this function is called by generic KCQ handler to process all pending CQE's
1705 */
1706 static void bnx2i_process_new_cqes(struct bnx2i_conn *bnx2i_conn)
1707 {
1708 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1709 struct iscsi_session *session = conn->session;
1710 struct qp_info *qp = &bnx2i_conn->ep->qp;
1711 struct bnx2i_nop_in_msg *nopin;
1712 int tgt_async_msg;
1713
1714 while (1) {
1715 nopin = (struct bnx2i_nop_in_msg *) qp->cq_cons_qe;
1716 if (nopin->cq_req_sn != qp->cqe_exp_seq_sn)
1717 break;
1718
1719 if (unlikely(test_bit(ISCSI_SUSPEND_BIT, &conn->suspend_rx)))
1720 break;
1721
1722 tgt_async_msg = 0;
1723
1724 switch (nopin->op_code) {
1725 case ISCSI_OP_SCSI_CMD_RSP:
1726 case ISCSI_OP_SCSI_DATA_IN:
1727 bnx2i_process_scsi_cmd_resp(session, bnx2i_conn,
1728 qp->cq_cons_qe);
1729 break;
1730 case ISCSI_OP_LOGIN_RSP:
1731 bnx2i_process_login_resp(session, bnx2i_conn,
1732 qp->cq_cons_qe);
1733 break;
1734 case ISCSI_OP_SCSI_TMFUNC_RSP:
1735 bnx2i_process_tmf_resp(session, bnx2i_conn,
1736 qp->cq_cons_qe);
1737 break;
1738 case ISCSI_OP_LOGOUT_RSP:
1739 bnx2i_process_logout_resp(session, bnx2i_conn,
1740 qp->cq_cons_qe);
1741 break;
1742 case ISCSI_OP_NOOP_IN:
1743 if (bnx2i_process_nopin_mesg(session, bnx2i_conn,
1744 qp->cq_cons_qe))
1745 tgt_async_msg = 1;
1746 break;
1747 case ISCSI_OPCODE_NOPOUT_LOCAL_COMPLETION:
1748 bnx2i_process_nopin_local_cmpl(session, bnx2i_conn,
1749 qp->cq_cons_qe);
1750 break;
1751 case ISCSI_OP_ASYNC_EVENT:
1752 bnx2i_process_async_mesg(session, bnx2i_conn,
1753 qp->cq_cons_qe);
1754 tgt_async_msg = 1;
1755 break;
1756 case ISCSI_OP_REJECT:
1757 bnx2i_process_reject_mesg(session, bnx2i_conn,
1758 qp->cq_cons_qe);
1759 break;
1760 case ISCSI_OPCODE_CLEANUP_RESPONSE:
1761 bnx2i_process_cmd_cleanup_resp(session, bnx2i_conn,
1762 qp->cq_cons_qe);
1763 break;
1764 default:
1765 printk(KERN_ALERT "bnx2i: unknown opcode 0x%x\n",
1766 nopin->op_code);
1767 }
1768
1769 if (!tgt_async_msg)
1770 bnx2i_conn->ep->num_active_cmds--;
1771
1772 /* clear out in production version only, till beta keep opcode
1773 * field intact, will be helpful in debugging (context dump)
1774 * nopin->op_code = 0;
1775 */
1776 qp->cqe_exp_seq_sn++;
1777 if (qp->cqe_exp_seq_sn == (qp->cqe_size * 2 + 1))
1778 qp->cqe_exp_seq_sn = ISCSI_INITIAL_SN;
1779
1780 if (qp->cq_cons_qe == qp->cq_last_qe) {
1781 qp->cq_cons_qe = qp->cq_first_qe;
1782 qp->cq_cons_idx = 0;
1783 } else {
1784 qp->cq_cons_qe++;
1785 qp->cq_cons_idx++;
1786 }
1787 }
1788 bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep, CNIC_ARM_CQE);
1789 }
1790
1791 /**
1792 * bnx2i_fastpath_notification - process global event queue (KCQ)
1793 * @hba: adapter structure pointer
1794 * @new_cqe_kcqe: pointer to newly DMA'ed KCQE entry
1795 *
1796 * Fast path event notification handler, KCQ entry carries context id
1797 * of the connection that has 1 or more pending CQ entries
1798 */
1799 static void bnx2i_fastpath_notification(struct bnx2i_hba *hba,
1800 struct iscsi_kcqe *new_cqe_kcqe)
1801 {
1802 struct bnx2i_conn *conn;
1803 u32 iscsi_cid;
1804
1805 iscsi_cid = new_cqe_kcqe->iscsi_conn_id;
1806 conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
1807
1808 if (!conn) {
1809 printk(KERN_ALERT "cid #%x not valid\n", iscsi_cid);
1810 return;
1811 }
1812 if (!conn->ep) {
1813 printk(KERN_ALERT "cid #%x - ep not bound\n", iscsi_cid);
1814 return;
1815 }
1816
1817 bnx2i_process_new_cqes(conn);
1818 }
1819
1820
1821 /**
1822 * bnx2i_process_update_conn_cmpl - process iscsi conn update completion KCQE
1823 * @hba: adapter structure pointer
1824 * @update_kcqe: kcqe pointer
1825 *
1826 * CONN_UPDATE completion handler, this completes iSCSI connection FFP migration
1827 */
1828 static void bnx2i_process_update_conn_cmpl(struct bnx2i_hba *hba,
1829 struct iscsi_kcqe *update_kcqe)
1830 {
1831 struct bnx2i_conn *conn;
1832 u32 iscsi_cid;
1833
1834 iscsi_cid = update_kcqe->iscsi_conn_id;
1835 conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
1836
1837 if (!conn) {
1838 printk(KERN_ALERT "conn_update: cid %x not valid\n", iscsi_cid);
1839 return;
1840 }
1841 if (!conn->ep) {
1842 printk(KERN_ALERT "cid %x does not have ep bound\n", iscsi_cid);
1843 return;
1844 }
1845
1846 if (update_kcqe->completion_status) {
1847 printk(KERN_ALERT "request failed cid %x\n", iscsi_cid);
1848 conn->ep->state = EP_STATE_ULP_UPDATE_FAILED;
1849 } else
1850 conn->ep->state = EP_STATE_ULP_UPDATE_COMPL;
1851
1852 wake_up_interruptible(&conn->ep->ofld_wait);
1853 }
1854
1855
1856 /**
1857 * bnx2i_recovery_que_add_conn - add connection to recovery queue
1858 * @hba: adapter structure pointer
1859 * @bnx2i_conn: iscsi connection
1860 *
1861 * Add connection to recovery queue and schedule adapter eh worker
1862 */
1863 static void bnx2i_recovery_que_add_conn(struct bnx2i_hba *hba,
1864 struct bnx2i_conn *bnx2i_conn)
1865 {
1866 iscsi_conn_failure(bnx2i_conn->cls_conn->dd_data,
1867 ISCSI_ERR_CONN_FAILED);
1868 }
1869
1870
1871 /**
1872 * bnx2i_process_tcp_error - process error notification on a given connection
1873 *
1874 * @hba: adapter structure pointer
1875 * @tcp_err: tcp error kcqe pointer
1876 *
1877 * handles tcp level error notifications from FW.
1878 */
1879 static void bnx2i_process_tcp_error(struct bnx2i_hba *hba,
1880 struct iscsi_kcqe *tcp_err)
1881 {
1882 struct bnx2i_conn *bnx2i_conn;
1883 u32 iscsi_cid;
1884
1885 iscsi_cid = tcp_err->iscsi_conn_id;
1886 bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
1887
1888 if (!bnx2i_conn) {
1889 printk(KERN_ALERT "bnx2i - cid 0x%x not valid\n", iscsi_cid);
1890 return;
1891 }
1892
1893 printk(KERN_ALERT "bnx2i - cid 0x%x had TCP errors, error code 0x%x\n",
1894 iscsi_cid, tcp_err->completion_status);
1895 bnx2i_recovery_que_add_conn(bnx2i_conn->hba, bnx2i_conn);
1896 }
1897
1898
1899 /**
1900 * bnx2i_process_iscsi_error - process error notification on a given connection
1901 * @hba: adapter structure pointer
1902 * @iscsi_err: iscsi error kcqe pointer
1903 *
1904 * handles iscsi error notifications from the FW. Firmware based in initial
1905 * handshake classifies iscsi protocol / TCP rfc violation into either
1906 * warning or error indications. If indication is of "Error" type, driver
1907 * will initiate session recovery for that connection/session. For
1908 * "Warning" type indication, driver will put out a system log message
1909 * (there will be only one message for each type for the life of the
1910 * session, this is to avoid un-necessarily overloading the system)
1911 */
1912 static void bnx2i_process_iscsi_error(struct bnx2i_hba *hba,
1913 struct iscsi_kcqe *iscsi_err)
1914 {
1915 struct bnx2i_conn *bnx2i_conn;
1916 u32 iscsi_cid;
1917 char warn_notice[] = "iscsi_warning";
1918 char error_notice[] = "iscsi_error";
1919 char additional_notice[64];
1920 char *message;
1921 int need_recovery;
1922 u64 err_mask64;
1923
1924 iscsi_cid = iscsi_err->iscsi_conn_id;
1925 bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
1926 if (!bnx2i_conn) {
1927 printk(KERN_ALERT "bnx2i - cid 0x%x not valid\n", iscsi_cid);
1928 return;
1929 }
1930
1931 err_mask64 = (0x1ULL << iscsi_err->completion_status);
1932
1933 if (err_mask64 & iscsi_error_mask) {
1934 need_recovery = 0;
1935 message = warn_notice;
1936 } else {
1937 need_recovery = 1;
1938 message = error_notice;
1939 }
1940
1941 switch (iscsi_err->completion_status) {
1942 case ISCSI_KCQE_COMPLETION_STATUS_HDR_DIG_ERR:
1943 strcpy(additional_notice, "hdr digest err");
1944 break;
1945 case ISCSI_KCQE_COMPLETION_STATUS_DATA_DIG_ERR:
1946 strcpy(additional_notice, "data digest err");
1947 break;
1948 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_OPCODE:
1949 strcpy(additional_notice, "wrong opcode rcvd");
1950 break;
1951 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_AHS_LEN:
1952 strcpy(additional_notice, "AHS len > 0 rcvd");
1953 break;
1954 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_ITT:
1955 strcpy(additional_notice, "invalid ITT rcvd");
1956 break;
1957 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_STATSN:
1958 strcpy(additional_notice, "wrong StatSN rcvd");
1959 break;
1960 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_EXP_DATASN:
1961 strcpy(additional_notice, "wrong DataSN rcvd");
1962 break;
1963 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T:
1964 strcpy(additional_notice, "pend R2T violation");
1965 break;
1966 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_0:
1967 strcpy(additional_notice, "ERL0, UO");
1968 break;
1969 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_1:
1970 strcpy(additional_notice, "ERL0, U1");
1971 break;
1972 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_2:
1973 strcpy(additional_notice, "ERL0, U2");
1974 break;
1975 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_3:
1976 strcpy(additional_notice, "ERL0, U3");
1977 break;
1978 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_4:
1979 strcpy(additional_notice, "ERL0, U4");
1980 break;
1981 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_5:
1982 strcpy(additional_notice, "ERL0, U5");
1983 break;
1984 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_6:
1985 strcpy(additional_notice, "ERL0, U6");
1986 break;
1987 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REMAIN_RCV_LEN:
1988 strcpy(additional_notice, "invalid resi len");
1989 break;
1990 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_MAX_RCV_PDU_LEN:
1991 strcpy(additional_notice, "MRDSL violation");
1992 break;
1993 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_F_BIT_ZERO:
1994 strcpy(additional_notice, "F-bit not set");
1995 break;
1996 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_NOT_RSRV:
1997 strcpy(additional_notice, "invalid TTT");
1998 break;
1999 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DATASN:
2000 strcpy(additional_notice, "invalid DataSN");
2001 break;
2002 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REMAIN_BURST_LEN:
2003 strcpy(additional_notice, "burst len violation");
2004 break;
2005 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_BUFFER_OFF:
2006 strcpy(additional_notice, "buf offset violation");
2007 break;
2008 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_LUN:
2009 strcpy(additional_notice, "invalid LUN field");
2010 break;
2011 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_R2TSN:
2012 strcpy(additional_notice, "invalid R2TSN field");
2013 break;
2014 #define BNX2I_ERR_DESIRED_DATA_TRNS_LEN_0 \
2015 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_0
2016 case BNX2I_ERR_DESIRED_DATA_TRNS_LEN_0:
2017 strcpy(additional_notice, "invalid cmd len1");
2018 break;
2019 #define BNX2I_ERR_DESIRED_DATA_TRNS_LEN_1 \
2020 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_1
2021 case BNX2I_ERR_DESIRED_DATA_TRNS_LEN_1:
2022 strcpy(additional_notice, "invalid cmd len2");
2023 break;
2024 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T_EXCEED:
2025 strcpy(additional_notice,
2026 "pend r2t exceeds MaxOutstandingR2T value");
2027 break;
2028 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_IS_RSRV:
2029 strcpy(additional_notice, "TTT is rsvd");
2030 break;
2031 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_MAX_BURST_LEN:
2032 strcpy(additional_notice, "MBL violation");
2033 break;
2034 #define BNX2I_ERR_DATA_SEG_LEN_NOT_ZERO \
2035 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DATA_SEG_LEN_NOT_ZERO
2036 case BNX2I_ERR_DATA_SEG_LEN_NOT_ZERO:
2037 strcpy(additional_notice, "data seg len != 0");
2038 break;
2039 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REJECT_PDU_LEN:
2040 strcpy(additional_notice, "reject pdu len error");
2041 break;
2042 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_ASYNC_PDU_LEN:
2043 strcpy(additional_notice, "async pdu len error");
2044 break;
2045 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_NOPIN_PDU_LEN:
2046 strcpy(additional_notice, "nopin pdu len error");
2047 break;
2048 #define BNX2_ERR_PEND_R2T_IN_CLEANUP \
2049 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T_IN_CLEANUP
2050 case BNX2_ERR_PEND_R2T_IN_CLEANUP:
2051 strcpy(additional_notice, "pend r2t in cleanup");
2052 break;
2053
2054 case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_IP_FRAGMENT:
2055 strcpy(additional_notice, "IP fragments rcvd");
2056 break;
2057 case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_IP_OPTIONS:
2058 strcpy(additional_notice, "IP options error");
2059 break;
2060 case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_URGENT_FLAG:
2061 strcpy(additional_notice, "urgent flag error");
2062 break;
2063 default:
2064 printk(KERN_ALERT "iscsi_err - unknown err %x\n",
2065 iscsi_err->completion_status);
2066 }
2067
2068 if (need_recovery) {
2069 iscsi_conn_printk(KERN_ALERT,
2070 bnx2i_conn->cls_conn->dd_data,
2071 "bnx2i: %s - %s\n",
2072 message, additional_notice);
2073
2074 iscsi_conn_printk(KERN_ALERT,
2075 bnx2i_conn->cls_conn->dd_data,
2076 "conn_err - hostno %d conn %p, "
2077 "iscsi_cid %x cid %x\n",
2078 bnx2i_conn->hba->shost->host_no,
2079 bnx2i_conn, bnx2i_conn->ep->ep_iscsi_cid,
2080 bnx2i_conn->ep->ep_cid);
2081 bnx2i_recovery_que_add_conn(bnx2i_conn->hba, bnx2i_conn);
2082 } else
2083 if (!test_and_set_bit(iscsi_err->completion_status,
2084 (void *) &bnx2i_conn->violation_notified))
2085 iscsi_conn_printk(KERN_ALERT,
2086 bnx2i_conn->cls_conn->dd_data,
2087 "bnx2i: %s - %s\n",
2088 message, additional_notice);
2089 }
2090
2091
2092 /**
2093 * bnx2i_process_conn_destroy_cmpl - process iscsi conn destroy completion
2094 * @hba: adapter structure pointer
2095 * @conn_destroy: conn destroy kcqe pointer
2096 *
2097 * handles connection destroy completion request.
2098 */
2099 static void bnx2i_process_conn_destroy_cmpl(struct bnx2i_hba *hba,
2100 struct iscsi_kcqe *conn_destroy)
2101 {
2102 struct bnx2i_endpoint *ep;
2103
2104 ep = bnx2i_find_ep_in_destroy_list(hba, conn_destroy->iscsi_conn_id);
2105 if (!ep) {
2106 printk(KERN_ALERT "bnx2i_conn_destroy_cmpl: no pending "
2107 "offload request, unexpected complection\n");
2108 return;
2109 }
2110
2111 if (hba != ep->hba) {
2112 printk(KERN_ALERT "conn destroy- error hba mis-match\n");
2113 return;
2114 }
2115
2116 if (conn_destroy->completion_status) {
2117 printk(KERN_ALERT "conn_destroy_cmpl: op failed\n");
2118 ep->state = EP_STATE_CLEANUP_FAILED;
2119 } else
2120 ep->state = EP_STATE_CLEANUP_CMPL;
2121 wake_up_interruptible(&ep->ofld_wait);
2122 }
2123
2124
2125 /**
2126 * bnx2i_process_ofld_cmpl - process initial iscsi conn offload completion
2127 * @hba: adapter structure pointer
2128 * @ofld_kcqe: conn offload kcqe pointer
2129 *
2130 * handles initial connection offload completion, ep_connect() thread is
2131 * woken-up to continue with LLP connect process
2132 */
2133 static void bnx2i_process_ofld_cmpl(struct bnx2i_hba *hba,
2134 struct iscsi_kcqe *ofld_kcqe)
2135 {
2136 u32 cid_addr;
2137 struct bnx2i_endpoint *ep;
2138 u32 cid_num;
2139
2140 ep = bnx2i_find_ep_in_ofld_list(hba, ofld_kcqe->iscsi_conn_id);
2141 if (!ep) {
2142 printk(KERN_ALERT "ofld_cmpl: no pend offload request\n");
2143 return;
2144 }
2145
2146 if (hba != ep->hba) {
2147 printk(KERN_ALERT "ofld_cmpl: error hba mis-match\n");
2148 return;
2149 }
2150
2151 if (ofld_kcqe->completion_status) {
2152 if (ofld_kcqe->completion_status ==
2153 ISCSI_KCQE_COMPLETION_STATUS_CTX_ALLOC_FAILURE)
2154 printk(KERN_ALERT "bnx2i: unable to allocate"
2155 " iSCSI context resources\n");
2156 ep->state = EP_STATE_OFLD_FAILED;
2157 } else {
2158 ep->state = EP_STATE_OFLD_COMPL;
2159 cid_addr = ofld_kcqe->iscsi_conn_context_id;
2160 cid_num = bnx2i_get_cid_num(ep);
2161 ep->ep_cid = cid_addr;
2162 ep->qp.ctx_base = NULL;
2163 }
2164 wake_up_interruptible(&ep->ofld_wait);
2165 }
2166
2167 /**
2168 * bnx2i_indicate_kcqe - process iscsi conn update completion KCQE
2169 * @hba: adapter structure pointer
2170 * @update_kcqe: kcqe pointer
2171 *
2172 * Generic KCQ event handler/dispatcher
2173 */
2174 static void bnx2i_indicate_kcqe(void *context, struct kcqe *kcqe[],
2175 u32 num_cqe)
2176 {
2177 struct bnx2i_hba *hba = context;
2178 int i = 0;
2179 struct iscsi_kcqe *ikcqe = NULL;
2180
2181 while (i < num_cqe) {
2182 ikcqe = (struct iscsi_kcqe *) kcqe[i++];
2183
2184 if (ikcqe->op_code ==
2185 ISCSI_KCQE_OPCODE_CQ_EVENT_NOTIFICATION)
2186 bnx2i_fastpath_notification(hba, ikcqe);
2187 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_OFFLOAD_CONN)
2188 bnx2i_process_ofld_cmpl(hba, ikcqe);
2189 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_UPDATE_CONN)
2190 bnx2i_process_update_conn_cmpl(hba, ikcqe);
2191 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_INIT) {
2192 if (ikcqe->completion_status !=
2193 ISCSI_KCQE_COMPLETION_STATUS_SUCCESS)
2194 bnx2i_iscsi_license_error(hba, ikcqe->\
2195 completion_status);
2196 else {
2197 set_bit(ADAPTER_STATE_UP, &hba->adapter_state);
2198 bnx2i_get_link_state(hba);
2199 printk(KERN_INFO "bnx2i [%.2x:%.2x.%.2x]: "
2200 "ISCSI_INIT passed\n",
2201 (u8)hba->pcidev->bus->number,
2202 hba->pci_devno,
2203 (u8)hba->pci_func);
2204
2205
2206 }
2207 } else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_DESTROY_CONN)
2208 bnx2i_process_conn_destroy_cmpl(hba, ikcqe);
2209 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_ISCSI_ERROR)
2210 bnx2i_process_iscsi_error(hba, ikcqe);
2211 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_TCP_ERROR)
2212 bnx2i_process_tcp_error(hba, ikcqe);
2213 else
2214 printk(KERN_ALERT "bnx2i: unknown opcode 0x%x\n",
2215 ikcqe->op_code);
2216 }
2217 }
2218
2219
2220 /**
2221 * bnx2i_indicate_netevent - Generic netdev event handler
2222 * @context: adapter structure pointer
2223 * @event: event type
2224 *
2225 * Handles four netdev events, NETDEV_UP, NETDEV_DOWN,
2226 * NETDEV_GOING_DOWN and NETDEV_CHANGE
2227 */
2228 static void bnx2i_indicate_netevent(void *context, unsigned long event)
2229 {
2230 struct bnx2i_hba *hba = context;
2231
2232 switch (event) {
2233 case NETDEV_UP:
2234 if (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state))
2235 bnx2i_send_fw_iscsi_init_msg(hba);
2236 break;
2237 case NETDEV_DOWN:
2238 clear_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state);
2239 clear_bit(ADAPTER_STATE_UP, &hba->adapter_state);
2240 break;
2241 case NETDEV_GOING_DOWN:
2242 set_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state);
2243 iscsi_host_for_each_session(hba->shost,
2244 bnx2i_drop_session);
2245 break;
2246 case NETDEV_CHANGE:
2247 bnx2i_get_link_state(hba);
2248 break;
2249 default:
2250 ;
2251 }
2252 }
2253
2254
2255 /**
2256 * bnx2i_cm_connect_cmpl - process iscsi conn establishment completion
2257 * @cm_sk: cnic sock structure pointer
2258 *
2259 * function callback exported via bnx2i - cnic driver interface to
2260 * indicate completion of option-2 TCP connect request.
2261 */
2262 static void bnx2i_cm_connect_cmpl(struct cnic_sock *cm_sk)
2263 {
2264 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2265
2266 if (test_bit(ADAPTER_STATE_GOING_DOWN, &ep->hba->adapter_state))
2267 ep->state = EP_STATE_CONNECT_FAILED;
2268 else if (test_bit(SK_F_OFFLD_COMPLETE, &cm_sk->flags))
2269 ep->state = EP_STATE_CONNECT_COMPL;
2270 else
2271 ep->state = EP_STATE_CONNECT_FAILED;
2272
2273 wake_up_interruptible(&ep->ofld_wait);
2274 }
2275
2276
2277 /**
2278 * bnx2i_cm_close_cmpl - process tcp conn close completion
2279 * @cm_sk: cnic sock structure pointer
2280 *
2281 * function callback exported via bnx2i - cnic driver interface to
2282 * indicate completion of option-2 graceful TCP connect shutdown
2283 */
2284 static void bnx2i_cm_close_cmpl(struct cnic_sock *cm_sk)
2285 {
2286 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2287
2288 ep->state = EP_STATE_DISCONN_COMPL;
2289 wake_up_interruptible(&ep->ofld_wait);
2290 }
2291
2292
2293 /**
2294 * bnx2i_cm_abort_cmpl - process abortive tcp conn teardown completion
2295 * @cm_sk: cnic sock structure pointer
2296 *
2297 * function callback exported via bnx2i - cnic driver interface to
2298 * indicate completion of option-2 abortive TCP connect termination
2299 */
2300 static void bnx2i_cm_abort_cmpl(struct cnic_sock *cm_sk)
2301 {
2302 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2303
2304 ep->state = EP_STATE_DISCONN_COMPL;
2305 wake_up_interruptible(&ep->ofld_wait);
2306 }
2307
2308
2309 /**
2310 * bnx2i_cm_remote_close - process received TCP FIN
2311 * @hba: adapter structure pointer
2312 * @update_kcqe: kcqe pointer
2313 *
2314 * function callback exported via bnx2i - cnic driver interface to indicate
2315 * async TCP events such as FIN
2316 */
2317 static void bnx2i_cm_remote_close(struct cnic_sock *cm_sk)
2318 {
2319 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2320
2321 ep->state = EP_STATE_TCP_FIN_RCVD;
2322 if (ep->conn)
2323 bnx2i_recovery_que_add_conn(ep->hba, ep->conn);
2324 }
2325
2326 /**
2327 * bnx2i_cm_remote_abort - process TCP RST and start conn cleanup
2328 * @hba: adapter structure pointer
2329 * @update_kcqe: kcqe pointer
2330 *
2331 * function callback exported via bnx2i - cnic driver interface to
2332 * indicate async TCP events (RST) sent by the peer.
2333 */
2334 static void bnx2i_cm_remote_abort(struct cnic_sock *cm_sk)
2335 {
2336 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2337
2338 ep->state = EP_STATE_TCP_RST_RCVD;
2339 if (ep->conn)
2340 bnx2i_recovery_que_add_conn(ep->hba, ep->conn);
2341 }
2342
2343
2344 static void bnx2i_send_nl_mesg(struct cnic_dev *dev, u32 msg_type,
2345 char *buf, u16 buflen)
2346 {
2347 struct bnx2i_hba *hba;
2348
2349 hba = bnx2i_find_hba_for_cnic(dev);
2350 if (!hba)
2351 return;
2352
2353 if (iscsi_offload_mesg(hba->shost, &bnx2i_iscsi_transport,
2354 msg_type, buf, buflen))
2355 printk(KERN_ALERT "bnx2i: private nl message send error\n");
2356
2357 }
2358
2359
2360 /**
2361 * bnx2i_cnic_cb - global template of bnx2i - cnic driver interface structure
2362 * carrying callback function pointers
2363 *
2364 */
2365 struct cnic_ulp_ops bnx2i_cnic_cb = {
2366 .cnic_init = bnx2i_ulp_init,
2367 .cnic_exit = bnx2i_ulp_exit,
2368 .cnic_start = bnx2i_start,
2369 .cnic_stop = bnx2i_stop,
2370 .indicate_kcqes = bnx2i_indicate_kcqe,
2371 .indicate_netevent = bnx2i_indicate_netevent,
2372 .cm_connect_complete = bnx2i_cm_connect_cmpl,
2373 .cm_close_complete = bnx2i_cm_close_cmpl,
2374 .cm_abort_complete = bnx2i_cm_abort_cmpl,
2375 .cm_remote_close = bnx2i_cm_remote_close,
2376 .cm_remote_abort = bnx2i_cm_remote_abort,
2377 .iscsi_nl_send_msg = bnx2i_send_nl_mesg,
2378 .owner = THIS_MODULE
2379 };
2380
2381
2382 /**
2383 * bnx2i_map_ep_dbell_regs - map connection doorbell registers
2384 * @ep: bnx2i endpoint
2385 *
2386 * maps connection's SQ and RQ doorbell registers, 5706/5708/5709 hosts these
2387 * register in BAR #0. Whereas in 57710 these register are accessed by
2388 * mapping BAR #1
2389 */
2390 int bnx2i_map_ep_dbell_regs(struct bnx2i_endpoint *ep)
2391 {
2392 u32 cid_num;
2393 u32 reg_off;
2394 u32 first_l4l5;
2395 u32 ctx_sz;
2396 u32 config2;
2397 resource_size_t reg_base;
2398
2399 cid_num = bnx2i_get_cid_num(ep);
2400
2401 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
2402 reg_base = pci_resource_start(ep->hba->pcidev,
2403 BNX2X_DOORBELL_PCI_BAR);
2404 reg_off = PAGE_SIZE * (cid_num & 0x1FFFF) + DPM_TRIGER_TYPE;
2405 ep->qp.ctx_base = ioremap_nocache(reg_base + reg_off, 4);
2406 goto arm_cq;
2407 }
2408
2409 reg_base = ep->hba->netdev->base_addr;
2410 if ((test_bit(BNX2I_NX2_DEV_5709, &ep->hba->cnic_dev_type)) &&
2411 (ep->hba->mail_queue_access == BNX2I_MQ_BIN_MODE)) {
2412 config2 = REG_RD(ep->hba, BNX2_MQ_CONFIG2);
2413 first_l4l5 = config2 & BNX2_MQ_CONFIG2_FIRST_L4L5;
2414 ctx_sz = (config2 & BNX2_MQ_CONFIG2_CONT_SZ) >> 3;
2415 if (ctx_sz)
2416 reg_off = CTX_OFFSET + MAX_CID_CNT * MB_KERNEL_CTX_SIZE
2417 + BNX2I_570X_PAGE_SIZE_DEFAULT *
2418 (((cid_num - first_l4l5) / ctx_sz) + 256);
2419 else
2420 reg_off = CTX_OFFSET + (MB_KERNEL_CTX_SIZE * cid_num);
2421 } else
2422 /* 5709 device in normal node and 5706/5708 devices */
2423 reg_off = CTX_OFFSET + (MB_KERNEL_CTX_SIZE * cid_num);
2424
2425 ep->qp.ctx_base = ioremap_nocache(reg_base + reg_off,
2426 MB_KERNEL_CTX_SIZE);
2427 if (!ep->qp.ctx_base)
2428 return -ENOMEM;
2429
2430 arm_cq:
2431 bnx2i_arm_cq_event_coalescing(ep, CNIC_ARM_CQE);
2432 return 0;
2433 }
Linux with added FPC-III support