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Staging: hv: blk dev depends on SCSI
[linux-2.6/linux-2.6-openrd.git] / drivers / scsi / bnx2i / bnx2i_hwi.c
blob906cef5cda86e113b4563419eded632a8edc3bc5
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
137 if (!test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
138 return;
139
140 if (action == CNIC_ARM_CQE) {
141 cq_index = ep->qp.cqe_exp_seq_sn +
142 ep->num_active_cmds / event_coal_div;
143 cq_index %= (ep->qp.cqe_size * 2 + 1);
144 if (!cq_index) {
145 cq_index = 1;
146 cq_db = (struct bnx2i_5771x_cq_db *)
147 ep->qp.cq_pgtbl_virt;
148 cq_db->sqn[0] = cq_index;
149 }
150 }
151 }
152
153
154 /**
155 * bnx2i_get_rq_buf - copy RQ buffer contents to driver buffer
156 * @conn: iscsi connection on which RQ event occured
157 * @ptr: driver buffer to which RQ buffer contents is to
158 * be copied
159 * @len: length of valid data inside RQ buf
160 *
161 * Copies RQ buffer contents from shared (DMA'able) memory region to
162 * driver buffer. RQ is used to DMA unsolicitated iscsi pdu's and
163 * scsi sense info
164 */
165 void bnx2i_get_rq_buf(struct bnx2i_conn *bnx2i_conn, char *ptr, int len)
166 {
167 if (!bnx2i_conn->ep->qp.rqe_left)
168 return;
169
170 bnx2i_conn->ep->qp.rqe_left--;
171 memcpy(ptr, (u8 *) bnx2i_conn->ep->qp.rq_cons_qe, len);
172 if (bnx2i_conn->ep->qp.rq_cons_qe == bnx2i_conn->ep->qp.rq_last_qe) {
173 bnx2i_conn->ep->qp.rq_cons_qe = bnx2i_conn->ep->qp.rq_first_qe;
174 bnx2i_conn->ep->qp.rq_cons_idx = 0;
175 } else {
176 bnx2i_conn->ep->qp.rq_cons_qe++;
177 bnx2i_conn->ep->qp.rq_cons_idx++;
178 }
179 }
180
181
182 static void bnx2i_ring_577xx_doorbell(struct bnx2i_conn *conn)
183 {
184 struct bnx2i_5771x_dbell dbell;
185 u32 msg;
186
187 memset(&dbell, 0, sizeof(dbell));
188 dbell.dbell.header = (B577XX_ISCSI_CONNECTION_TYPE <<
189 B577XX_DOORBELL_HDR_CONN_TYPE_SHIFT);
190 msg = *((u32 *)&dbell);
191 /* TODO : get doorbell register mapping */
192 writel(cpu_to_le32(msg), conn->ep->qp.ctx_base);
193 }
194
195
196 /**
197 * bnx2i_put_rq_buf - Replenish RQ buffer, if required ring on chip doorbell
198 * @conn: iscsi connection on which event to post
199 * @count: number of RQ buffer being posted to chip
200 *
201 * No need to ring hardware doorbell for 57710 family of devices
202 */
203 void bnx2i_put_rq_buf(struct bnx2i_conn *bnx2i_conn, int count)
204 {
205 struct bnx2i_5771x_sq_rq_db *rq_db;
206 u16 hi_bit = (bnx2i_conn->ep->qp.rq_prod_idx & 0x8000);
207 struct bnx2i_endpoint *ep = bnx2i_conn->ep;
208
209 ep->qp.rqe_left += count;
210 ep->qp.rq_prod_idx &= 0x7FFF;
211 ep->qp.rq_prod_idx += count;
212
213 if (ep->qp.rq_prod_idx > bnx2i_conn->hba->max_rqes) {
214 ep->qp.rq_prod_idx %= bnx2i_conn->hba->max_rqes;
215 if (!hi_bit)
216 ep->qp.rq_prod_idx |= 0x8000;
217 } else
218 ep->qp.rq_prod_idx |= hi_bit;
219
220 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
221 rq_db = (struct bnx2i_5771x_sq_rq_db *) ep->qp.rq_pgtbl_virt;
222 rq_db->prod_idx = ep->qp.rq_prod_idx;
223 /* no need to ring hardware doorbell for 57710 */
224 } else {
225 writew(ep->qp.rq_prod_idx,
226 ep->qp.ctx_base + CNIC_RECV_DOORBELL);
227 }
228 mmiowb();
229 }
230
231
232 /**
233 * bnx2i_ring_sq_dbell - Ring SQ doorbell to wake-up the processing engine
234 * @conn: iscsi connection to which new SQ entries belong
235 * @count: number of SQ WQEs to post
236 *
237 * SQ DB is updated in host memory and TX Doorbell is rung for 57710 family
238 * of devices. For 5706/5708/5709 new SQ WQE count is written into the
239 * doorbell register
240 */
241 static void bnx2i_ring_sq_dbell(struct bnx2i_conn *bnx2i_conn, int count)
242 {
243 struct bnx2i_5771x_sq_rq_db *sq_db;
244 struct bnx2i_endpoint *ep = bnx2i_conn->ep;
245
246 ep->num_active_cmds++;
247 wmb(); /* flush SQ WQE memory before the doorbell is rung */
248 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
249 sq_db = (struct bnx2i_5771x_sq_rq_db *) ep->qp.sq_pgtbl_virt;
250 sq_db->prod_idx = ep->qp.sq_prod_idx;
251 bnx2i_ring_577xx_doorbell(bnx2i_conn);
252 } else
253 writew(count, ep->qp.ctx_base + CNIC_SEND_DOORBELL);
254
255 mmiowb(); /* flush posted PCI writes */
256 }
257
258
259 /**
260 * bnx2i_ring_dbell_update_sq_params - update SQ driver parameters
261 * @conn: iscsi connection to which new SQ entries belong
262 * @count: number of SQ WQEs to post
263 *
264 * this routine will update SQ driver parameters and ring the doorbell
265 */
266 static void bnx2i_ring_dbell_update_sq_params(struct bnx2i_conn *bnx2i_conn,
267 int count)
268 {
269 int tmp_cnt;
270
271 if (count == 1) {
272 if (bnx2i_conn->ep->qp.sq_prod_qe ==
273 bnx2i_conn->ep->qp.sq_last_qe)
274 bnx2i_conn->ep->qp.sq_prod_qe =
275 bnx2i_conn->ep->qp.sq_first_qe;
276 else
277 bnx2i_conn->ep->qp.sq_prod_qe++;
278 } else {
279 if ((bnx2i_conn->ep->qp.sq_prod_qe + count) <=
280 bnx2i_conn->ep->qp.sq_last_qe)
281 bnx2i_conn->ep->qp.sq_prod_qe += count;
282 else {
283 tmp_cnt = bnx2i_conn->ep->qp.sq_last_qe -
284 bnx2i_conn->ep->qp.sq_prod_qe;
285 bnx2i_conn->ep->qp.sq_prod_qe =
286 &bnx2i_conn->ep->qp.sq_first_qe[count -
287 (tmp_cnt + 1)];
288 }
289 }
290 bnx2i_conn->ep->qp.sq_prod_idx += count;
291 /* Ring the doorbell */
292 bnx2i_ring_sq_dbell(bnx2i_conn, bnx2i_conn->ep->qp.sq_prod_idx);
293 }
294
295
296 /**
297 * bnx2i_send_iscsi_login - post iSCSI login request MP WQE to hardware
298 * @conn: iscsi connection
299 * @cmd: driver command structure which is requesting
300 * a WQE to sent to chip for further processing
301 *
302 * prepare and post an iSCSI Login request WQE to CNIC firmware
303 */
304 int bnx2i_send_iscsi_login(struct bnx2i_conn *bnx2i_conn,
305 struct iscsi_task *task)
306 {
307 struct bnx2i_cmd *bnx2i_cmd;
308 struct bnx2i_login_request *login_wqe;
309 struct iscsi_login *login_hdr;
310 u32 dword;
311
312 bnx2i_cmd = (struct bnx2i_cmd *)task->dd_data;
313 login_hdr = (struct iscsi_login *)task->hdr;
314 login_wqe = (struct bnx2i_login_request *)
315 bnx2i_conn->ep->qp.sq_prod_qe;
316
317 login_wqe->op_code = login_hdr->opcode;
318 login_wqe->op_attr = login_hdr->flags;
319 login_wqe->version_max = login_hdr->max_version;
320 login_wqe->version_min = login_hdr->min_version;
321 login_wqe->data_length = ntoh24(login_hdr->dlength);
322 login_wqe->isid_lo = *((u32 *) login_hdr->isid);
323 login_wqe->isid_hi = *((u16 *) login_hdr->isid + 2);
324 login_wqe->tsih = login_hdr->tsih;
325 login_wqe->itt = task->itt |
326 (ISCSI_TASK_TYPE_MPATH << ISCSI_LOGIN_REQUEST_TYPE_SHIFT);
327 login_wqe->cid = login_hdr->cid;
328
329 login_wqe->cmd_sn = be32_to_cpu(login_hdr->cmdsn);
330 login_wqe->exp_stat_sn = be32_to_cpu(login_hdr->exp_statsn);
331
332 login_wqe->resp_bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_bd_dma;
333 login_wqe->resp_bd_list_addr_hi =
334 (u32) ((u64) bnx2i_conn->gen_pdu.resp_bd_dma >> 32);
335
336 dword = ((1 << ISCSI_LOGIN_REQUEST_NUM_RESP_BDS_SHIFT) |
337 (bnx2i_conn->gen_pdu.resp_buf_size <<
338 ISCSI_LOGIN_REQUEST_RESP_BUFFER_LENGTH_SHIFT));
339 login_wqe->resp_buffer = dword;
340 login_wqe->flags = 0;
341 login_wqe->bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.req_bd_dma;
342 login_wqe->bd_list_addr_hi =
343 (u32) ((u64) bnx2i_conn->gen_pdu.req_bd_dma >> 32);
344 login_wqe->num_bds = 1;
345 login_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
346
347 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
348 return 0;
349 }
350
351 /**
352 * bnx2i_send_iscsi_tmf - post iSCSI task management request MP WQE to hardware
353 * @conn: iscsi connection
354 * @mtask: driver command structure which is requesting
355 * a WQE to sent to chip for further processing
356 *
357 * prepare and post an iSCSI Login request WQE to CNIC firmware
358 */
359 int bnx2i_send_iscsi_tmf(struct bnx2i_conn *bnx2i_conn,
360 struct iscsi_task *mtask)
361 {
362 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
363 struct iscsi_tm *tmfabort_hdr;
364 struct scsi_cmnd *ref_sc;
365 struct iscsi_task *ctask;
366 struct bnx2i_cmd *bnx2i_cmd;
367 struct bnx2i_tmf_request *tmfabort_wqe;
368 u32 dword;
369
370 bnx2i_cmd = (struct bnx2i_cmd *)mtask->dd_data;
371 tmfabort_hdr = (struct iscsi_tm *)mtask->hdr;
372 tmfabort_wqe = (struct bnx2i_tmf_request *)
373 bnx2i_conn->ep->qp.sq_prod_qe;
374
375 tmfabort_wqe->op_code = tmfabort_hdr->opcode;
376 tmfabort_wqe->op_attr = 0;
377 tmfabort_wqe->op_attr =
378 ISCSI_TMF_REQUEST_ALWAYS_ONE | ISCSI_TM_FUNC_ABORT_TASK;
379 tmfabort_wqe->lun[0] = be32_to_cpu(tmfabort_hdr->lun[0]);
380 tmfabort_wqe->lun[1] = be32_to_cpu(tmfabort_hdr->lun[1]);
381
382 tmfabort_wqe->itt = (mtask->itt | (ISCSI_TASK_TYPE_MPATH << 14));
383 tmfabort_wqe->reserved2 = 0;
384 tmfabort_wqe->cmd_sn = be32_to_cpu(tmfabort_hdr->cmdsn);
385
386 ctask = iscsi_itt_to_task(conn, tmfabort_hdr->rtt);
387 if (!ctask || ctask->sc)
388 /*
389 * the iscsi layer must have completed the cmd while this
390 * was starting up.
391 */
392 return 0;
393 ref_sc = ctask->sc;
394
395 if (ref_sc->sc_data_direction == DMA_TO_DEVICE)
396 dword = (ISCSI_TASK_TYPE_WRITE << ISCSI_CMD_REQUEST_TYPE_SHIFT);
397 else
398 dword = (ISCSI_TASK_TYPE_READ << ISCSI_CMD_REQUEST_TYPE_SHIFT);
399 tmfabort_wqe->ref_itt = (dword | tmfabort_hdr->rtt);
400 tmfabort_wqe->ref_cmd_sn = be32_to_cpu(tmfabort_hdr->refcmdsn);
401
402 tmfabort_wqe->bd_list_addr_lo = (u32) bnx2i_conn->hba->mp_bd_dma;
403 tmfabort_wqe->bd_list_addr_hi = (u32)
404 ((u64) bnx2i_conn->hba->mp_bd_dma >> 32);
405 tmfabort_wqe->num_bds = 1;
406 tmfabort_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
407
408 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
409 return 0;
410 }
411
412 /**
413 * bnx2i_send_iscsi_scsicmd - post iSCSI scsicmd request WQE to hardware
414 * @conn: iscsi connection
415 * @cmd: driver command structure which is requesting
416 * a WQE to sent to chip for further processing
417 *
418 * prepare and post an iSCSI SCSI-CMD request WQE to CNIC firmware
419 */
420 int bnx2i_send_iscsi_scsicmd(struct bnx2i_conn *bnx2i_conn,
421 struct bnx2i_cmd *cmd)
422 {
423 struct bnx2i_cmd_request *scsi_cmd_wqe;
424
425 scsi_cmd_wqe = (struct bnx2i_cmd_request *)
426 bnx2i_conn->ep->qp.sq_prod_qe;
427 memcpy(scsi_cmd_wqe, &cmd->req, sizeof(struct bnx2i_cmd_request));
428 scsi_cmd_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
429
430 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
431 return 0;
432 }
433
434 /**
435 * bnx2i_send_iscsi_nopout - post iSCSI NOPOUT request WQE to hardware
436 * @conn: iscsi connection
437 * @cmd: driver command structure which is requesting
438 * a WQE to sent to chip for further processing
439 * @ttt: TTT to be used when building pdu header
440 * @datap: payload buffer pointer
441 * @data_len: payload data length
442 * @unsol: indicated whether nopout pdu is unsolicited pdu or
443 * in response to target's NOPIN w/ TTT != FFFFFFFF
444 *
445 * prepare and post a nopout request WQE to CNIC firmware
446 */
447 int bnx2i_send_iscsi_nopout(struct bnx2i_conn *bnx2i_conn,
448 struct iscsi_task *task, u32 ttt,
449 char *datap, int data_len, int unsol)
450 {
451 struct bnx2i_endpoint *ep = bnx2i_conn->ep;
452 struct bnx2i_cmd *bnx2i_cmd;
453 struct bnx2i_nop_out_request *nopout_wqe;
454 struct iscsi_nopout *nopout_hdr;
455
456 bnx2i_cmd = (struct bnx2i_cmd *)task->dd_data;
457 nopout_hdr = (struct iscsi_nopout *)task->hdr;
458 nopout_wqe = (struct bnx2i_nop_out_request *)ep->qp.sq_prod_qe;
459 nopout_wqe->op_code = nopout_hdr->opcode;
460 nopout_wqe->op_attr = ISCSI_FLAG_CMD_FINAL;
461 memcpy(nopout_wqe->lun, nopout_hdr->lun, 8);
462
463 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
464 u32 tmp = nopout_hdr->lun[0];
465 /* 57710 requires LUN field to be swapped */
466 nopout_hdr->lun[0] = nopout_hdr->lun[1];
467 nopout_hdr->lun[1] = tmp;
468 }
469
470 nopout_wqe->itt = ((u16)task->itt |
471 (ISCSI_TASK_TYPE_MPATH <<
472 ISCSI_TMF_REQUEST_TYPE_SHIFT));
473 nopout_wqe->ttt = ttt;
474 nopout_wqe->flags = 0;
475 if (!unsol)
476 nopout_wqe->flags = ISCSI_NOP_OUT_REQUEST_LOCAL_COMPLETION;
477 else if (nopout_hdr->itt == RESERVED_ITT)
478 nopout_wqe->flags = ISCSI_NOP_OUT_REQUEST_LOCAL_COMPLETION;
479
480 nopout_wqe->cmd_sn = be32_to_cpu(nopout_hdr->cmdsn);
481 nopout_wqe->data_length = data_len;
482 if (data_len) {
483 /* handle payload data, not required in first release */
484 printk(KERN_ALERT "NOPOUT: WARNING!! payload len != 0\n");
485 } else {
486 nopout_wqe->bd_list_addr_lo = (u32)
487 bnx2i_conn->hba->mp_bd_dma;
488 nopout_wqe->bd_list_addr_hi =
489 (u32) ((u64) bnx2i_conn->hba->mp_bd_dma >> 32);
490 nopout_wqe->num_bds = 1;
491 }
492 nopout_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
493
494 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
495 return 0;
496 }
497
498
499 /**
500 * bnx2i_send_iscsi_logout - post iSCSI logout request WQE to hardware
501 * @conn: iscsi connection
502 * @cmd: driver command structure which is requesting
503 * a WQE to sent to chip for further processing
504 *
505 * prepare and post logout request WQE to CNIC firmware
506 */
507 int bnx2i_send_iscsi_logout(struct bnx2i_conn *bnx2i_conn,
508 struct iscsi_task *task)
509 {
510 struct bnx2i_cmd *bnx2i_cmd;
511 struct bnx2i_logout_request *logout_wqe;
512 struct iscsi_logout *logout_hdr;
513
514 bnx2i_cmd = (struct bnx2i_cmd *)task->dd_data;
515 logout_hdr = (struct iscsi_logout *)task->hdr;
516
517 logout_wqe = (struct bnx2i_logout_request *)
518 bnx2i_conn->ep->qp.sq_prod_qe;
519 memset(logout_wqe, 0x00, sizeof(struct bnx2i_logout_request));
520
521 logout_wqe->op_code = logout_hdr->opcode;
522 logout_wqe->cmd_sn = be32_to_cpu(logout_hdr->cmdsn);
523 logout_wqe->op_attr =
524 logout_hdr->flags | ISCSI_LOGOUT_REQUEST_ALWAYS_ONE;
525 logout_wqe->itt = ((u16)task->itt |
526 (ISCSI_TASK_TYPE_MPATH <<
527 ISCSI_LOGOUT_REQUEST_TYPE_SHIFT));
528 logout_wqe->data_length = 0;
529 logout_wqe->cid = 0;
530
531 logout_wqe->bd_list_addr_lo = (u32) bnx2i_conn->hba->mp_bd_dma;
532 logout_wqe->bd_list_addr_hi = (u32)
533 ((u64) bnx2i_conn->hba->mp_bd_dma >> 32);
534 logout_wqe->num_bds = 1;
535 logout_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
536
537 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
538 return 0;
539 }
540
541
542 /**
543 * bnx2i_update_iscsi_conn - post iSCSI logout request WQE to hardware
544 * @conn: iscsi connection which requires iscsi parameter update
545 *
546 * sends down iSCSI Conn Update request to move iSCSI conn to FFP
547 */
548 void bnx2i_update_iscsi_conn(struct iscsi_conn *conn)
549 {
550 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
551 struct bnx2i_hba *hba = bnx2i_conn->hba;
552 struct kwqe *kwqe_arr[2];
553 struct iscsi_kwqe_conn_update *update_wqe;
554 struct iscsi_kwqe_conn_update conn_update_kwqe;
555
556 update_wqe = &conn_update_kwqe;
557
558 update_wqe->hdr.op_code = ISCSI_KWQE_OPCODE_UPDATE_CONN;
559 update_wqe->hdr.flags =
560 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
561
562 /* 5771x requires conn context id to be passed as is */
563 if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_conn->ep->hba->cnic_dev_type))
564 update_wqe->context_id = bnx2i_conn->ep->ep_cid;
565 else
566 update_wqe->context_id = (bnx2i_conn->ep->ep_cid >> 7);
567 update_wqe->conn_flags = 0;
568 if (conn->hdrdgst_en)
569 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_HEADER_DIGEST;
570 if (conn->datadgst_en)
571 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_DATA_DIGEST;
572 if (conn->session->initial_r2t_en)
573 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_INITIAL_R2T;
574 if (conn->session->imm_data_en)
575 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_IMMEDIATE_DATA;
576
577 update_wqe->max_send_pdu_length = conn->max_xmit_dlength;
578 update_wqe->max_recv_pdu_length = conn->max_recv_dlength;
579 update_wqe->first_burst_length = conn->session->first_burst;
580 update_wqe->max_burst_length = conn->session->max_burst;
581 update_wqe->exp_stat_sn = conn->exp_statsn;
582 update_wqe->max_outstanding_r2ts = conn->session->max_r2t;
583 update_wqe->session_error_recovery_level = conn->session->erl;
584 iscsi_conn_printk(KERN_ALERT, conn,
585 "bnx2i: conn update - MBL 0x%x FBL 0x%x"
586 "MRDSL_I 0x%x MRDSL_T 0x%x \n",
587 update_wqe->max_burst_length,
588 update_wqe->first_burst_length,
589 update_wqe->max_recv_pdu_length,
590 update_wqe->max_send_pdu_length);
591
592 kwqe_arr[0] = (struct kwqe *) update_wqe;
593 if (hba->cnic && hba->cnic->submit_kwqes)
594 hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 1);
595 }
596
597
598 /**
599 * bnx2i_ep_ofld_timer - post iSCSI logout request WQE to hardware
600 * @data: endpoint (transport handle) structure pointer
601 *
602 * routine to handle connection offload/destroy request timeout
603 */
604 void bnx2i_ep_ofld_timer(unsigned long data)
605 {
606 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) data;
607
608 if (ep->state == EP_STATE_OFLD_START) {
609 printk(KERN_ALERT "ofld_timer: CONN_OFLD timeout\n");
610 ep->state = EP_STATE_OFLD_FAILED;
611 } else if (ep->state == EP_STATE_DISCONN_START) {
612 printk(KERN_ALERT "ofld_timer: CONN_DISCON timeout\n");
613 ep->state = EP_STATE_DISCONN_TIMEDOUT;
614 } else if (ep->state == EP_STATE_CLEANUP_START) {
615 printk(KERN_ALERT "ofld_timer: CONN_CLEANUP timeout\n");
616 ep->state = EP_STATE_CLEANUP_FAILED;
617 }
618
619 wake_up_interruptible(&ep->ofld_wait);
620 }
621
622
623 static int bnx2i_power_of2(u32 val)
624 {
625 u32 power = 0;
626 if (val & (val - 1))
627 return power;
628 val--;
629 while (val) {
630 val = val >> 1;
631 power++;
632 }
633 return power;
634 }
635
636
637 /**
638 * bnx2i_send_cmd_cleanup_req - send iscsi cmd context clean-up request
639 * @hba: adapter structure pointer
640 * @cmd: driver command structure which is requesting
641 * a WQE to sent to chip for further processing
642 *
643 * prepares and posts CONN_OFLD_REQ1/2 KWQE
644 */
645 void bnx2i_send_cmd_cleanup_req(struct bnx2i_hba *hba, struct bnx2i_cmd *cmd)
646 {
647 struct bnx2i_cleanup_request *cmd_cleanup;
648
649 cmd_cleanup =
650 (struct bnx2i_cleanup_request *)cmd->conn->ep->qp.sq_prod_qe;
651 memset(cmd_cleanup, 0x00, sizeof(struct bnx2i_cleanup_request));
652
653 cmd_cleanup->op_code = ISCSI_OPCODE_CLEANUP_REQUEST;
654 cmd_cleanup->itt = cmd->req.itt;
655 cmd_cleanup->cq_index = 0; /* CQ# used for completion, 5771x only */
656
657 bnx2i_ring_dbell_update_sq_params(cmd->conn, 1);
658 }
659
660
661 /**
662 * bnx2i_send_conn_destroy - initiates iscsi connection teardown process
663 * @hba: adapter structure pointer
664 * @ep: endpoint (transport indentifier) structure
665 *
666 * this routine prepares and posts CONN_OFLD_REQ1/2 KWQE to initiate
667 * iscsi connection context clean-up process
668 */
669 void bnx2i_send_conn_destroy(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
670 {
671 struct kwqe *kwqe_arr[2];
672 struct iscsi_kwqe_conn_destroy conn_cleanup;
673
674 memset(&conn_cleanup, 0x00, sizeof(struct iscsi_kwqe_conn_destroy));
675
676 conn_cleanup.hdr.op_code = ISCSI_KWQE_OPCODE_DESTROY_CONN;
677 conn_cleanup.hdr.flags =
678 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
679 /* 5771x requires conn context id to be passed as is */
680 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
681 conn_cleanup.context_id = ep->ep_cid;
682 else
683 conn_cleanup.context_id = (ep->ep_cid >> 7);
684
685 conn_cleanup.reserved0 = (u16)ep->ep_iscsi_cid;
686
687 kwqe_arr[0] = (struct kwqe *) &conn_cleanup;
688 if (hba->cnic && hba->cnic->submit_kwqes)
689 hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 1);
690 }
691
692
693 /**
694 * bnx2i_570x_send_conn_ofld_req - initiates iscsi conn context setup process
695 * @hba: adapter structure pointer
696 * @ep: endpoint (transport indentifier) structure
697 *
698 * 5706/5708/5709 specific - prepares and posts CONN_OFLD_REQ1/2 KWQE
699 */
700 static void bnx2i_570x_send_conn_ofld_req(struct bnx2i_hba *hba,
701 struct bnx2i_endpoint *ep)
702 {
703 struct kwqe *kwqe_arr[2];
704 struct iscsi_kwqe_conn_offload1 ofld_req1;
705 struct iscsi_kwqe_conn_offload2 ofld_req2;
706 dma_addr_t dma_addr;
707 int num_kwqes = 2;
708 u32 *ptbl;
709
710 ofld_req1.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN1;
711 ofld_req1.hdr.flags =
712 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
713
714 ofld_req1.iscsi_conn_id = (u16) ep->ep_iscsi_cid;
715
716 dma_addr = ep->qp.sq_pgtbl_phys;
717 ofld_req1.sq_page_table_addr_lo = (u32) dma_addr;
718 ofld_req1.sq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
719
720 dma_addr = ep->qp.cq_pgtbl_phys;
721 ofld_req1.cq_page_table_addr_lo = (u32) dma_addr;
722 ofld_req1.cq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
723
724 ofld_req2.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN2;
725 ofld_req2.hdr.flags =
726 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
727
728 dma_addr = ep->qp.rq_pgtbl_phys;
729 ofld_req2.rq_page_table_addr_lo = (u32) dma_addr;
730 ofld_req2.rq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
731
732 ptbl = (u32 *) ep->qp.sq_pgtbl_virt;
733
734 ofld_req2.sq_first_pte.hi = *ptbl++;
735 ofld_req2.sq_first_pte.lo = *ptbl;
736
737 ptbl = (u32 *) ep->qp.cq_pgtbl_virt;
738 ofld_req2.cq_first_pte.hi = *ptbl++;
739 ofld_req2.cq_first_pte.lo = *ptbl;
740
741 kwqe_arr[0] = (struct kwqe *) &ofld_req1;
742 kwqe_arr[1] = (struct kwqe *) &ofld_req2;
743 ofld_req2.num_additional_wqes = 0;
744
745 if (hba->cnic && hba->cnic->submit_kwqes)
746 hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, num_kwqes);
747 }
748
749
750 /**
751 * bnx2i_5771x_send_conn_ofld_req - initiates iscsi connection context creation
752 * @hba: adapter structure pointer
753 * @ep: endpoint (transport indentifier) structure
754 *
755 * 57710 specific - prepares and posts CONN_OFLD_REQ1/2 KWQE
756 */
757 static void bnx2i_5771x_send_conn_ofld_req(struct bnx2i_hba *hba,
758 struct bnx2i_endpoint *ep)
759 {
760 struct kwqe *kwqe_arr[5];
761 struct iscsi_kwqe_conn_offload1 ofld_req1;
762 struct iscsi_kwqe_conn_offload2 ofld_req2;
763 struct iscsi_kwqe_conn_offload3 ofld_req3[1];
764 dma_addr_t dma_addr;
765 int num_kwqes = 2;
766 u32 *ptbl;
767
768 ofld_req1.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN1;
769 ofld_req1.hdr.flags =
770 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
771
772 ofld_req1.iscsi_conn_id = (u16) ep->ep_iscsi_cid;
773
774 dma_addr = ep->qp.sq_pgtbl_phys + ISCSI_SQ_DB_SIZE;
775 ofld_req1.sq_page_table_addr_lo = (u32) dma_addr;
776 ofld_req1.sq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
777
778 dma_addr = ep->qp.cq_pgtbl_phys + ISCSI_CQ_DB_SIZE;
779 ofld_req1.cq_page_table_addr_lo = (u32) dma_addr;
780 ofld_req1.cq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
781
782 ofld_req2.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN2;
783 ofld_req2.hdr.flags =
784 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
785
786 dma_addr = ep->qp.rq_pgtbl_phys + ISCSI_RQ_DB_SIZE;
787 ofld_req2.rq_page_table_addr_lo = (u32) dma_addr;
788 ofld_req2.rq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
789
790 ptbl = (u32 *)((u8 *)ep->qp.sq_pgtbl_virt + ISCSI_SQ_DB_SIZE);
791 ofld_req2.sq_first_pte.hi = *ptbl++;
792 ofld_req2.sq_first_pte.lo = *ptbl;
793
794 ptbl = (u32 *)((u8 *)ep->qp.cq_pgtbl_virt + ISCSI_CQ_DB_SIZE);
795 ofld_req2.cq_first_pte.hi = *ptbl++;
796 ofld_req2.cq_first_pte.lo = *ptbl;
797
798 kwqe_arr[0] = (struct kwqe *) &ofld_req1;
799 kwqe_arr[1] = (struct kwqe *) &ofld_req2;
800
801 ofld_req2.num_additional_wqes = 1;
802 memset(ofld_req3, 0x00, sizeof(ofld_req3[0]));
803 ptbl = (u32 *)((u8 *)ep->qp.rq_pgtbl_virt + ISCSI_RQ_DB_SIZE);
804 ofld_req3[0].qp_first_pte[0].hi = *ptbl++;
805 ofld_req3[0].qp_first_pte[0].lo = *ptbl;
806
807 kwqe_arr[2] = (struct kwqe *) ofld_req3;
808 /* need if we decide to go with multiple KCQE's per conn */
809 num_kwqes += 1;
810
811 if (hba->cnic && hba->cnic->submit_kwqes)
812 hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, num_kwqes);
813 }
814
815 /**
816 * bnx2i_send_conn_ofld_req - initiates iscsi connection context setup process
817 *
818 * @hba: adapter structure pointer
819 * @ep: endpoint (transport indentifier) structure
820 *
821 * this routine prepares and posts CONN_OFLD_REQ1/2 KWQE
822 */
823 void bnx2i_send_conn_ofld_req(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
824 {
825 if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type))
826 bnx2i_5771x_send_conn_ofld_req(hba, ep);
827 else
828 bnx2i_570x_send_conn_ofld_req(hba, ep);
829 }
830
831
832 /**
833 * setup_qp_page_tables - iscsi QP page table setup function
834 * @ep: endpoint (transport indentifier) structure
835 *
836 * Sets up page tables for SQ/RQ/CQ, 1G/sec (5706/5708/5709) devices requires
837 * 64-bit address in big endian format. Whereas 10G/sec (57710) requires
838 * PT in little endian format
839 */
840 static void setup_qp_page_tables(struct bnx2i_endpoint *ep)
841 {
842 int num_pages;
843 u32 *ptbl;
844 dma_addr_t page;
845 int cnic_dev_10g;
846
847 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
848 cnic_dev_10g = 1;
849 else
850 cnic_dev_10g = 0;
851
852 /* SQ page table */
853 memset(ep->qp.sq_pgtbl_virt, 0, ep->qp.sq_pgtbl_size);
854 num_pages = ep->qp.sq_mem_size / PAGE_SIZE;
855 page = ep->qp.sq_phys;
856
857 if (cnic_dev_10g)
858 ptbl = (u32 *)((u8 *)ep->qp.sq_pgtbl_virt + ISCSI_SQ_DB_SIZE);
859 else
860 ptbl = (u32 *) ep->qp.sq_pgtbl_virt;
861 while (num_pages--) {
862 if (cnic_dev_10g) {
863 /* PTE is written in little endian format for 57710 */
864 *ptbl = (u32) page;
865 ptbl++;
866 *ptbl = (u32) ((u64) page >> 32);
867 ptbl++;
868 page += PAGE_SIZE;
869 } else {
870 /* PTE is written in big endian format for
871 * 5706/5708/5709 devices */
872 *ptbl = (u32) ((u64) page >> 32);
873 ptbl++;
874 *ptbl = (u32) page;
875 ptbl++;
876 page += PAGE_SIZE;
877 }
878 }
879
880 /* RQ page table */
881 memset(ep->qp.rq_pgtbl_virt, 0, ep->qp.rq_pgtbl_size);
882 num_pages = ep->qp.rq_mem_size / PAGE_SIZE;
883 page = ep->qp.rq_phys;
884
885 if (cnic_dev_10g)
886 ptbl = (u32 *)((u8 *)ep->qp.rq_pgtbl_virt + ISCSI_RQ_DB_SIZE);
887 else
888 ptbl = (u32 *) ep->qp.rq_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 /* CQ page table */
909 memset(ep->qp.cq_pgtbl_virt, 0, ep->qp.cq_pgtbl_size);
910 num_pages = ep->qp.cq_mem_size / PAGE_SIZE;
911 page = ep->qp.cq_phys;
912
913 if (cnic_dev_10g)
914 ptbl = (u32 *)((u8 *)ep->qp.cq_pgtbl_virt + ISCSI_CQ_DB_SIZE);
915 else
916 ptbl = (u32 *) ep->qp.cq_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
937
938 /**
939 * bnx2i_alloc_qp_resc - allocates required resources for QP.
940 * @hba: adapter structure pointer
941 * @ep: endpoint (transport indentifier) structure
942 *
943 * Allocate QP (transport layer for iSCSI connection) resources, DMA'able
944 * memory for SQ/RQ/CQ and page tables. EP structure elements such
945 * as producer/consumer indexes/pointers, queue sizes and page table
946 * contents are setup
947 */
948 int bnx2i_alloc_qp_resc(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
949 {
950 struct bnx2i_5771x_cq_db *cq_db;
951
952 ep->hba = hba;
953 ep->conn = NULL;
954 ep->ep_cid = ep->ep_iscsi_cid = ep->ep_pg_cid = 0;
955
956 /* Allocate page table memory for SQ which is page aligned */
957 ep->qp.sq_mem_size = hba->max_sqes * BNX2I_SQ_WQE_SIZE;
958 ep->qp.sq_mem_size =
959 (ep->qp.sq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
960 ep->qp.sq_pgtbl_size =
961 (ep->qp.sq_mem_size / PAGE_SIZE) * sizeof(void *);
962 ep->qp.sq_pgtbl_size =
963 (ep->qp.sq_pgtbl_size + (PAGE_SIZE - 1)) & PAGE_MASK;
964
965 ep->qp.sq_pgtbl_virt =
966 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.sq_pgtbl_size,
967 &ep->qp.sq_pgtbl_phys, GFP_KERNEL);
968 if (!ep->qp.sq_pgtbl_virt) {
969 printk(KERN_ALERT "bnx2i: unable to alloc SQ PT mem (%d)\n",
970 ep->qp.sq_pgtbl_size);
971 goto mem_alloc_err;
972 }
973
974 /* Allocate memory area for actual SQ element */
975 ep->qp.sq_virt =
976 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.sq_mem_size,
977 &ep->qp.sq_phys, GFP_KERNEL);
978 if (!ep->qp.sq_virt) {
979 printk(KERN_ALERT "bnx2i: unable to alloc SQ BD memory %d\n",
980 ep->qp.sq_mem_size);
981 goto mem_alloc_err;
982 }
983
984 memset(ep->qp.sq_virt, 0x00, ep->qp.sq_mem_size);
985 ep->qp.sq_first_qe = ep->qp.sq_virt;
986 ep->qp.sq_prod_qe = ep->qp.sq_first_qe;
987 ep->qp.sq_cons_qe = ep->qp.sq_first_qe;
988 ep->qp.sq_last_qe = &ep->qp.sq_first_qe[hba->max_sqes - 1];
989 ep->qp.sq_prod_idx = 0;
990 ep->qp.sq_cons_idx = 0;
991 ep->qp.sqe_left = hba->max_sqes;
992
993 /* Allocate page table memory for CQ which is page aligned */
994 ep->qp.cq_mem_size = hba->max_cqes * BNX2I_CQE_SIZE;
995 ep->qp.cq_mem_size =
996 (ep->qp.cq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
997 ep->qp.cq_pgtbl_size =
998 (ep->qp.cq_mem_size / PAGE_SIZE) * sizeof(void *);
999 ep->qp.cq_pgtbl_size =
1000 (ep->qp.cq_pgtbl_size + (PAGE_SIZE - 1)) & PAGE_MASK;
1001
1002 ep->qp.cq_pgtbl_virt =
1003 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.cq_pgtbl_size,
1004 &ep->qp.cq_pgtbl_phys, GFP_KERNEL);
1005 if (!ep->qp.cq_pgtbl_virt) {
1006 printk(KERN_ALERT "bnx2i: unable to alloc CQ PT memory %d\n",
1007 ep->qp.cq_pgtbl_size);
1008 goto mem_alloc_err;
1009 }
1010
1011 /* Allocate memory area for actual CQ element */
1012 ep->qp.cq_virt =
1013 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.cq_mem_size,
1014 &ep->qp.cq_phys, GFP_KERNEL);
1015 if (!ep->qp.cq_virt) {
1016 printk(KERN_ALERT "bnx2i: unable to alloc CQ BD memory %d\n",
1017 ep->qp.cq_mem_size);
1018 goto mem_alloc_err;
1019 }
1020 memset(ep->qp.cq_virt, 0x00, ep->qp.cq_mem_size);
1021
1022 ep->qp.cq_first_qe = ep->qp.cq_virt;
1023 ep->qp.cq_prod_qe = ep->qp.cq_first_qe;
1024 ep->qp.cq_cons_qe = ep->qp.cq_first_qe;
1025 ep->qp.cq_last_qe = &ep->qp.cq_first_qe[hba->max_cqes - 1];
1026 ep->qp.cq_prod_idx = 0;
1027 ep->qp.cq_cons_idx = 0;
1028 ep->qp.cqe_left = hba->max_cqes;
1029 ep->qp.cqe_exp_seq_sn = ISCSI_INITIAL_SN;
1030 ep->qp.cqe_size = hba->max_cqes;
1031
1032 /* Invalidate all EQ CQE index, req only for 57710 */
1033 cq_db = (struct bnx2i_5771x_cq_db *) ep->qp.cq_pgtbl_virt;
1034 memset(cq_db->sqn, 0xFF, sizeof(cq_db->sqn[0]) * BNX2X_MAX_CQS);
1035
1036 /* Allocate page table memory for RQ which is page aligned */
1037 ep->qp.rq_mem_size = hba->max_rqes * BNX2I_RQ_WQE_SIZE;
1038 ep->qp.rq_mem_size =
1039 (ep->qp.rq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
1040 ep->qp.rq_pgtbl_size =
1041 (ep->qp.rq_mem_size / PAGE_SIZE) * sizeof(void *);
1042 ep->qp.rq_pgtbl_size =
1043 (ep->qp.rq_pgtbl_size + (PAGE_SIZE - 1)) & PAGE_MASK;
1044
1045 ep->qp.rq_pgtbl_virt =
1046 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.rq_pgtbl_size,
1047 &ep->qp.rq_pgtbl_phys, GFP_KERNEL);
1048 if (!ep->qp.rq_pgtbl_virt) {
1049 printk(KERN_ALERT "bnx2i: unable to alloc RQ PT mem %d\n",
1050 ep->qp.rq_pgtbl_size);
1051 goto mem_alloc_err;
1052 }
1053
1054 /* Allocate memory area for actual RQ element */
1055 ep->qp.rq_virt =
1056 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.rq_mem_size,
1057 &ep->qp.rq_phys, GFP_KERNEL);
1058 if (!ep->qp.rq_virt) {
1059 printk(KERN_ALERT "bnx2i: unable to alloc RQ BD memory %d\n",
1060 ep->qp.rq_mem_size);
1061 goto mem_alloc_err;
1062 }
1063
1064 ep->qp.rq_first_qe = ep->qp.rq_virt;
1065 ep->qp.rq_prod_qe = ep->qp.rq_first_qe;
1066 ep->qp.rq_cons_qe = ep->qp.rq_first_qe;
1067 ep->qp.rq_last_qe = &ep->qp.rq_first_qe[hba->max_rqes - 1];
1068 ep->qp.rq_prod_idx = 0x8000;
1069 ep->qp.rq_cons_idx = 0;
1070 ep->qp.rqe_left = hba->max_rqes;
1071
1072 setup_qp_page_tables(ep);
1073
1074 return 0;
1075
1076 mem_alloc_err:
1077 bnx2i_free_qp_resc(hba, ep);
1078 return -ENOMEM;
1079 }
1080
1081
1082
1083 /**
1084 * bnx2i_free_qp_resc - free memory resources held by QP
1085 * @hba: adapter structure pointer
1086 * @ep: endpoint (transport indentifier) structure
1087 *
1088 * Free QP resources - SQ/RQ/CQ memory and page tables.
1089 */
1090 void bnx2i_free_qp_resc(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
1091 {
1092 if (ep->qp.ctx_base) {
1093 iounmap(ep->qp.ctx_base);
1094 ep->qp.ctx_base = NULL;
1095 }
1096 /* Free SQ mem */
1097 if (ep->qp.sq_pgtbl_virt) {
1098 dma_free_coherent(&hba->pcidev->dev, ep->qp.sq_pgtbl_size,
1099 ep->qp.sq_pgtbl_virt, ep->qp.sq_pgtbl_phys);
1100 ep->qp.sq_pgtbl_virt = NULL;
1101 ep->qp.sq_pgtbl_phys = 0;
1102 }
1103 if (ep->qp.sq_virt) {
1104 dma_free_coherent(&hba->pcidev->dev, ep->qp.sq_mem_size,
1105 ep->qp.sq_virt, ep->qp.sq_phys);
1106 ep->qp.sq_virt = NULL;
1107 ep->qp.sq_phys = 0;
1108 }
1109
1110 /* Free RQ mem */
1111 if (ep->qp.rq_pgtbl_virt) {
1112 dma_free_coherent(&hba->pcidev->dev, ep->qp.rq_pgtbl_size,
1113 ep->qp.rq_pgtbl_virt, ep->qp.rq_pgtbl_phys);
1114 ep->qp.rq_pgtbl_virt = NULL;
1115 ep->qp.rq_pgtbl_phys = 0;
1116 }
1117 if (ep->qp.rq_virt) {
1118 dma_free_coherent(&hba->pcidev->dev, ep->qp.rq_mem_size,
1119 ep->qp.rq_virt, ep->qp.rq_phys);
1120 ep->qp.rq_virt = NULL;
1121 ep->qp.rq_phys = 0;
1122 }
1123
1124 /* Free CQ mem */
1125 if (ep->qp.cq_pgtbl_virt) {
1126 dma_free_coherent(&hba->pcidev->dev, ep->qp.cq_pgtbl_size,
1127 ep->qp.cq_pgtbl_virt, ep->qp.cq_pgtbl_phys);
1128 ep->qp.cq_pgtbl_virt = NULL;
1129 ep->qp.cq_pgtbl_phys = 0;
1130 }
1131 if (ep->qp.cq_virt) {
1132 dma_free_coherent(&hba->pcidev->dev, ep->qp.cq_mem_size,
1133 ep->qp.cq_virt, ep->qp.cq_phys);
1134 ep->qp.cq_virt = NULL;
1135 ep->qp.cq_phys = 0;
1136 }
1137 }
1138
1139
1140 /**
1141 * bnx2i_send_fw_iscsi_init_msg - initiates initial handshake with iscsi f/w
1142 * @hba: adapter structure pointer
1143 *
1144 * Send down iscsi_init KWQEs which initiates the initial handshake with the f/w
1145 * This results in iSCSi support validation and on-chip context manager
1146 * initialization. Firmware completes this handshake with a CQE carrying
1147 * the result of iscsi support validation. Parameter carried by
1148 * iscsi init request determines the number of offloaded connection and
1149 * tolerance level for iscsi protocol violation this hba/chip can support
1150 */
1151 int bnx2i_send_fw_iscsi_init_msg(struct bnx2i_hba *hba)
1152 {
1153 struct kwqe *kwqe_arr[3];
1154 struct iscsi_kwqe_init1 iscsi_init;
1155 struct iscsi_kwqe_init2 iscsi_init2;
1156 int rc = 0;
1157 u64 mask64;
1158
1159 bnx2i_adjust_qp_size(hba);
1160
1161 iscsi_init.flags =
1162 ISCSI_PAGE_SIZE_4K << ISCSI_KWQE_INIT1_PAGE_SIZE_SHIFT;
1163 if (en_tcp_dack)
1164 iscsi_init.flags |= ISCSI_KWQE_INIT1_DELAYED_ACK_ENABLE;
1165 iscsi_init.reserved0 = 0;
1166 iscsi_init.num_cqs = 1;
1167 iscsi_init.hdr.op_code = ISCSI_KWQE_OPCODE_INIT1;
1168 iscsi_init.hdr.flags =
1169 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
1170
1171 iscsi_init.dummy_buffer_addr_lo = (u32) hba->dummy_buf_dma;
1172 iscsi_init.dummy_buffer_addr_hi =
1173 (u32) ((u64) hba->dummy_buf_dma >> 32);
1174
1175 hba->ctx_ccell_tasks =
1176 ((hba->num_ccell & 0xFFFF) | (hba->max_sqes << 16));
1177 iscsi_init.num_ccells_per_conn = hba->num_ccell;
1178 iscsi_init.num_tasks_per_conn = hba->max_sqes;
1179 iscsi_init.sq_wqes_per_page = PAGE_SIZE / BNX2I_SQ_WQE_SIZE;
1180 iscsi_init.sq_num_wqes = hba->max_sqes;
1181 iscsi_init.cq_log_wqes_per_page =
1182 (u8) bnx2i_power_of2(PAGE_SIZE / BNX2I_CQE_SIZE);
1183 iscsi_init.cq_num_wqes = hba->max_cqes;
1184 iscsi_init.cq_num_pages = (hba->max_cqes * BNX2I_CQE_SIZE +
1185 (PAGE_SIZE - 1)) / PAGE_SIZE;
1186 iscsi_init.sq_num_pages = (hba->max_sqes * BNX2I_SQ_WQE_SIZE +
1187 (PAGE_SIZE - 1)) / PAGE_SIZE;
1188 iscsi_init.rq_buffer_size = BNX2I_RQ_WQE_SIZE;
1189 iscsi_init.rq_num_wqes = hba->max_rqes;
1190
1191
1192 iscsi_init2.hdr.op_code = ISCSI_KWQE_OPCODE_INIT2;
1193 iscsi_init2.hdr.flags =
1194 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
1195 iscsi_init2.max_cq_sqn = hba->max_cqes * 2 + 1;
1196 mask64 = 0x0ULL;
1197 mask64 |= (
1198 /* CISCO MDS */
1199 (1UL <<
1200 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_NOT_RSRV) |
1201 /* HP MSA1510i */
1202 (1UL <<
1203 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_EXP_DATASN) |
1204 /* EMC */
1205 (1ULL << ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_LUN));
1206 if (error_mask1)
1207 iscsi_init2.error_bit_map[0] = error_mask1;
1208 else
1209 iscsi_init2.error_bit_map[0] = (u32) mask64;
1210
1211 if (error_mask2)
1212 iscsi_init2.error_bit_map[1] = error_mask2;
1213 else
1214 iscsi_init2.error_bit_map[1] = (u32) (mask64 >> 32);
1215
1216 iscsi_error_mask = mask64;
1217
1218 kwqe_arr[0] = (struct kwqe *) &iscsi_init;
1219 kwqe_arr[1] = (struct kwqe *) &iscsi_init2;
1220
1221 if (hba->cnic && hba->cnic->submit_kwqes)
1222 rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 2);
1223 return rc;
1224 }
1225
1226
1227 /**
1228 * bnx2i_process_scsi_cmd_resp - this function handles scsi cmd completion.
1229 * @conn: iscsi connection
1230 * @cqe: pointer to newly DMA'ed CQE entry for processing
1231 *
1232 * process SCSI CMD Response CQE & complete the request to SCSI-ML
1233 */
1234 static int bnx2i_process_scsi_cmd_resp(struct iscsi_session *session,
1235 struct bnx2i_conn *bnx2i_conn,
1236 struct cqe *cqe)
1237 {
1238 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1239 struct bnx2i_cmd_response *resp_cqe;
1240 struct bnx2i_cmd *bnx2i_cmd;
1241 struct iscsi_task *task;
1242 struct iscsi_cmd_rsp *hdr;
1243 u32 datalen = 0;
1244
1245 resp_cqe = (struct bnx2i_cmd_response *)cqe;
1246 spin_lock(&session->lock);
1247 task = iscsi_itt_to_task(conn,
1248 resp_cqe->itt & ISCSI_CMD_RESPONSE_INDEX);
1249 if (!task)
1250 goto fail;
1251
1252 bnx2i_cmd = task->dd_data;
1253
1254 if (bnx2i_cmd->req.op_attr & ISCSI_CMD_REQUEST_READ) {
1255 conn->datain_pdus_cnt +=
1256 resp_cqe->task_stat.read_stat.num_data_outs;
1257 conn->rxdata_octets +=
1258 bnx2i_cmd->req.total_data_transfer_length;
1259 } else {
1260 conn->dataout_pdus_cnt +=
1261 resp_cqe->task_stat.read_stat.num_data_outs;
1262 conn->r2t_pdus_cnt +=
1263 resp_cqe->task_stat.read_stat.num_r2ts;
1264 conn->txdata_octets +=
1265 bnx2i_cmd->req.total_data_transfer_length;
1266 }
1267 bnx2i_iscsi_unmap_sg_list(bnx2i_cmd);
1268
1269 hdr = (struct iscsi_cmd_rsp *)task->hdr;
1270 resp_cqe = (struct bnx2i_cmd_response *)cqe;
1271 hdr->opcode = resp_cqe->op_code;
1272 hdr->max_cmdsn = cpu_to_be32(resp_cqe->max_cmd_sn);
1273 hdr->exp_cmdsn = cpu_to_be32(resp_cqe->exp_cmd_sn);
1274 hdr->response = resp_cqe->response;
1275 hdr->cmd_status = resp_cqe->status;
1276 hdr->flags = resp_cqe->response_flags;
1277 hdr->residual_count = cpu_to_be32(resp_cqe->residual_count);
1278
1279 if (resp_cqe->op_code == ISCSI_OP_SCSI_DATA_IN)
1280 goto done;
1281
1282 if (resp_cqe->status == SAM_STAT_CHECK_CONDITION) {
1283 datalen = resp_cqe->data_length;
1284 if (datalen < 2)
1285 goto done;
1286
1287 if (datalen > BNX2I_RQ_WQE_SIZE) {
1288 iscsi_conn_printk(KERN_ERR, conn,
1289 "sense data len %d > RQ sz\n",
1290 datalen);
1291 datalen = BNX2I_RQ_WQE_SIZE;
1292 } else if (datalen > ISCSI_DEF_MAX_RECV_SEG_LEN) {
1293 iscsi_conn_printk(KERN_ERR, conn,
1294 "sense data len %d > conn data\n",
1295 datalen);
1296 datalen = ISCSI_DEF_MAX_RECV_SEG_LEN;
1297 }
1298
1299 bnx2i_get_rq_buf(bnx2i_cmd->conn, conn->data, datalen);
1300 bnx2i_put_rq_buf(bnx2i_cmd->conn, 1);
1301 }
1302
1303 done:
1304 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr,
1305 conn->data, datalen);
1306 fail:
1307 spin_unlock(&session->lock);
1308 return 0;
1309 }
1310
1311
1312 /**
1313 * bnx2i_process_login_resp - this function handles iscsi login response
1314 * @session: iscsi session pointer
1315 * @bnx2i_conn: iscsi connection pointer
1316 * @cqe: pointer to newly DMA'ed CQE entry for processing
1317 *
1318 * process Login Response CQE & complete it to open-iscsi user daemon
1319 */
1320 static int bnx2i_process_login_resp(struct iscsi_session *session,
1321 struct bnx2i_conn *bnx2i_conn,
1322 struct cqe *cqe)
1323 {
1324 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1325 struct iscsi_task *task;
1326 struct bnx2i_login_response *login;
1327 struct iscsi_login_rsp *resp_hdr;
1328 int pld_len;
1329 int pad_len;
1330
1331 login = (struct bnx2i_login_response *) cqe;
1332 spin_lock(&session->lock);
1333 task = iscsi_itt_to_task(conn,
1334 login->itt & ISCSI_LOGIN_RESPONSE_INDEX);
1335 if (!task)
1336 goto done;
1337
1338 resp_hdr = (struct iscsi_login_rsp *) &bnx2i_conn->gen_pdu.resp_hdr;
1339 memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1340 resp_hdr->opcode = login->op_code;
1341 resp_hdr->flags = login->response_flags;
1342 resp_hdr->max_version = login->version_max;
1343 resp_hdr->active_version = login->version_active;;
1344 resp_hdr->hlength = 0;
1345
1346 hton24(resp_hdr->dlength, login->data_length);
1347 memcpy(resp_hdr->isid, &login->isid_lo, 6);
1348 resp_hdr->tsih = cpu_to_be16(login->tsih);
1349 resp_hdr->itt = task->hdr->itt;
1350 resp_hdr->statsn = cpu_to_be32(login->stat_sn);
1351 resp_hdr->exp_cmdsn = cpu_to_be32(login->exp_cmd_sn);
1352 resp_hdr->max_cmdsn = cpu_to_be32(login->max_cmd_sn);
1353 resp_hdr->status_class = login->status_class;
1354 resp_hdr->status_detail = login->status_detail;
1355 pld_len = login->data_length;
1356 bnx2i_conn->gen_pdu.resp_wr_ptr =
1357 bnx2i_conn->gen_pdu.resp_buf + pld_len;
1358
1359 pad_len = 0;
1360 if (pld_len & 0x3)
1361 pad_len = 4 - (pld_len % 4);
1362
1363 if (pad_len) {
1364 int i = 0;
1365 for (i = 0; i < pad_len; i++) {
1366 bnx2i_conn->gen_pdu.resp_wr_ptr[0] = 0;
1367 bnx2i_conn->gen_pdu.resp_wr_ptr++;
1368 }
1369 }
1370
1371 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr,
1372 bnx2i_conn->gen_pdu.resp_buf,
1373 bnx2i_conn->gen_pdu.resp_wr_ptr - bnx2i_conn->gen_pdu.resp_buf);
1374 done:
1375 spin_unlock(&session->lock);
1376 return 0;
1377 }
1378
1379 /**
1380 * bnx2i_process_tmf_resp - this function handles iscsi TMF response
1381 * @session: iscsi session pointer
1382 * @bnx2i_conn: iscsi connection pointer
1383 * @cqe: pointer to newly DMA'ed CQE entry for processing
1384 *
1385 * process iSCSI TMF Response CQE and wake up the driver eh thread.
1386 */
1387 static int bnx2i_process_tmf_resp(struct iscsi_session *session,
1388 struct bnx2i_conn *bnx2i_conn,
1389 struct cqe *cqe)
1390 {
1391 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1392 struct iscsi_task *task;
1393 struct bnx2i_tmf_response *tmf_cqe;
1394 struct iscsi_tm_rsp *resp_hdr;
1395
1396 tmf_cqe = (struct bnx2i_tmf_response *)cqe;
1397 spin_lock(&session->lock);
1398 task = iscsi_itt_to_task(conn,
1399 tmf_cqe->itt & ISCSI_TMF_RESPONSE_INDEX);
1400 if (!task)
1401 goto done;
1402
1403 resp_hdr = (struct iscsi_tm_rsp *) &bnx2i_conn->gen_pdu.resp_hdr;
1404 memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1405 resp_hdr->opcode = tmf_cqe->op_code;
1406 resp_hdr->max_cmdsn = cpu_to_be32(tmf_cqe->max_cmd_sn);
1407 resp_hdr->exp_cmdsn = cpu_to_be32(tmf_cqe->exp_cmd_sn);
1408 resp_hdr->itt = task->hdr->itt;
1409 resp_hdr->response = tmf_cqe->response;
1410
1411 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0);
1412 done:
1413 spin_unlock(&session->lock);
1414 return 0;
1415 }
1416
1417 /**
1418 * bnx2i_process_logout_resp - this function handles iscsi logout response
1419 * @session: iscsi session pointer
1420 * @bnx2i_conn: iscsi connection pointer
1421 * @cqe: pointer to newly DMA'ed CQE entry for processing
1422 *
1423 * process iSCSI Logout Response CQE & make function call to
1424 * notify the user daemon.
1425 */
1426 static int bnx2i_process_logout_resp(struct iscsi_session *session,
1427 struct bnx2i_conn *bnx2i_conn,
1428 struct cqe *cqe)
1429 {
1430 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1431 struct iscsi_task *task;
1432 struct bnx2i_logout_response *logout;
1433 struct iscsi_logout_rsp *resp_hdr;
1434
1435 logout = (struct bnx2i_logout_response *) cqe;
1436 spin_lock(&session->lock);
1437 task = iscsi_itt_to_task(conn,
1438 logout->itt & ISCSI_LOGOUT_RESPONSE_INDEX);
1439 if (!task)
1440 goto done;
1441
1442 resp_hdr = (struct iscsi_logout_rsp *) &bnx2i_conn->gen_pdu.resp_hdr;
1443 memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1444 resp_hdr->opcode = logout->op_code;
1445 resp_hdr->flags = logout->response;
1446 resp_hdr->hlength = 0;
1447
1448 resp_hdr->itt = task->hdr->itt;
1449 resp_hdr->statsn = task->hdr->exp_statsn;
1450 resp_hdr->exp_cmdsn = cpu_to_be32(logout->exp_cmd_sn);
1451 resp_hdr->max_cmdsn = cpu_to_be32(logout->max_cmd_sn);
1452
1453 resp_hdr->t2wait = cpu_to_be32(logout->time_to_wait);
1454 resp_hdr->t2retain = cpu_to_be32(logout->time_to_retain);
1455
1456 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0);
1457 done:
1458 spin_unlock(&session->lock);
1459 return 0;
1460 }
1461
1462 /**
1463 * bnx2i_process_nopin_local_cmpl - this function handles iscsi nopin CQE
1464 * @session: iscsi session pointer
1465 * @bnx2i_conn: iscsi connection pointer
1466 * @cqe: pointer to newly DMA'ed CQE entry for processing
1467 *
1468 * process iSCSI NOPIN local completion CQE, frees IIT and command structures
1469 */
1470 static void bnx2i_process_nopin_local_cmpl(struct iscsi_session *session,
1471 struct bnx2i_conn *bnx2i_conn,
1472 struct cqe *cqe)
1473 {
1474 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1475 struct bnx2i_nop_in_msg *nop_in;
1476 struct iscsi_task *task;
1477
1478 nop_in = (struct bnx2i_nop_in_msg *)cqe;
1479 spin_lock(&session->lock);
1480 task = iscsi_itt_to_task(conn,
1481 nop_in->itt & ISCSI_NOP_IN_MSG_INDEX);
1482 if (task)
1483 iscsi_put_task(task);
1484 spin_unlock(&session->lock);
1485 }
1486
1487 /**
1488 * bnx2i_unsol_pdu_adjust_rq - makes adjustments to RQ after unsol pdu is recvd
1489 * @conn: iscsi connection
1490 *
1491 * Firmware advances RQ producer index for every unsolicited PDU even if
1492 * payload data length is '0'. This function makes corresponding
1493 * adjustments on the driver side to match this f/w behavior
1494 */
1495 static void bnx2i_unsol_pdu_adjust_rq(struct bnx2i_conn *bnx2i_conn)
1496 {
1497 char dummy_rq_data[2];
1498 bnx2i_get_rq_buf(bnx2i_conn, dummy_rq_data, 1);
1499 bnx2i_put_rq_buf(bnx2i_conn, 1);
1500 }
1501
1502
1503 /**
1504 * bnx2i_process_nopin_mesg - this function handles iscsi nopin CQE
1505 * @session: iscsi session pointer
1506 * @bnx2i_conn: iscsi connection pointer
1507 * @cqe: pointer to newly DMA'ed CQE entry for processing
1508 *
1509 * process iSCSI target's proactive iSCSI NOPIN request
1510 */
1511 static int bnx2i_process_nopin_mesg(struct iscsi_session *session,
1512 struct bnx2i_conn *bnx2i_conn,
1513 struct cqe *cqe)
1514 {
1515 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1516 struct iscsi_task *task;
1517 struct bnx2i_nop_in_msg *nop_in;
1518 struct iscsi_nopin *hdr;
1519 u32 itt;
1520 int tgt_async_nop = 0;
1521
1522 nop_in = (struct bnx2i_nop_in_msg *)cqe;
1523 itt = nop_in->itt & ISCSI_NOP_IN_MSG_INDEX;
1524
1525 spin_lock(&session->lock);
1526 hdr = (struct iscsi_nopin *)&bnx2i_conn->gen_pdu.resp_hdr;
1527 memset(hdr, 0, sizeof(struct iscsi_hdr));
1528 hdr->opcode = nop_in->op_code;
1529 hdr->max_cmdsn = cpu_to_be32(nop_in->max_cmd_sn);
1530 hdr->exp_cmdsn = cpu_to_be32(nop_in->exp_cmd_sn);
1531 hdr->ttt = cpu_to_be32(nop_in->ttt);
1532
1533 if (itt == (u16) RESERVED_ITT) {
1534 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
1535 hdr->itt = RESERVED_ITT;
1536 tgt_async_nop = 1;
1537 goto done;
1538 }
1539
1540 /* this is a response to one of our nop-outs */
1541 task = iscsi_itt_to_task(conn, itt);
1542 if (task) {
1543 hdr->flags = ISCSI_FLAG_CMD_FINAL;
1544 hdr->itt = task->hdr->itt;
1545 hdr->ttt = cpu_to_be32(nop_in->ttt);
1546 memcpy(hdr->lun, nop_in->lun, 8);
1547 }
1548 done:
1549 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, NULL, 0);
1550 spin_unlock(&session->lock);
1551
1552 return tgt_async_nop;
1553 }
1554
1555
1556 /**
1557 * bnx2i_process_async_mesg - this function handles iscsi async message
1558 * @session: iscsi session pointer
1559 * @bnx2i_conn: iscsi connection pointer
1560 * @cqe: pointer to newly DMA'ed CQE entry for processing
1561 *
1562 * process iSCSI ASYNC Message
1563 */
1564 static void bnx2i_process_async_mesg(struct iscsi_session *session,
1565 struct bnx2i_conn *bnx2i_conn,
1566 struct cqe *cqe)
1567 {
1568 struct bnx2i_async_msg *async_cqe;
1569 struct iscsi_async *resp_hdr;
1570 u8 async_event;
1571
1572 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
1573
1574 async_cqe = (struct bnx2i_async_msg *)cqe;
1575 async_event = async_cqe->async_event;
1576
1577 if (async_event == ISCSI_ASYNC_MSG_SCSI_EVENT) {
1578 iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data,
1579 "async: scsi events not supported\n");
1580 return;
1581 }
1582
1583 spin_lock(&session->lock);
1584 resp_hdr = (struct iscsi_async *) &bnx2i_conn->gen_pdu.resp_hdr;
1585 memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1586 resp_hdr->opcode = async_cqe->op_code;
1587 resp_hdr->flags = 0x80;
1588
1589 memcpy(resp_hdr->lun, async_cqe->lun, 8);
1590 resp_hdr->exp_cmdsn = cpu_to_be32(async_cqe->exp_cmd_sn);
1591 resp_hdr->max_cmdsn = cpu_to_be32(async_cqe->max_cmd_sn);
1592
1593 resp_hdr->async_event = async_cqe->async_event;
1594 resp_hdr->async_vcode = async_cqe->async_vcode;
1595
1596 resp_hdr->param1 = cpu_to_be16(async_cqe->param1);
1597 resp_hdr->param2 = cpu_to_be16(async_cqe->param2);
1598 resp_hdr->param3 = cpu_to_be16(async_cqe->param3);
1599
1600 __iscsi_complete_pdu(bnx2i_conn->cls_conn->dd_data,
1601 (struct iscsi_hdr *)resp_hdr, NULL, 0);
1602 spin_unlock(&session->lock);
1603 }
1604
1605
1606 /**
1607 * bnx2i_process_reject_mesg - process iscsi reject pdu
1608 * @session: iscsi session pointer
1609 * @bnx2i_conn: iscsi connection pointer
1610 * @cqe: pointer to newly DMA'ed CQE entry for processing
1611 *
1612 * process iSCSI REJECT message
1613 */
1614 static void bnx2i_process_reject_mesg(struct iscsi_session *session,
1615 struct bnx2i_conn *bnx2i_conn,
1616 struct cqe *cqe)
1617 {
1618 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1619 struct bnx2i_reject_msg *reject;
1620 struct iscsi_reject *hdr;
1621
1622 reject = (struct bnx2i_reject_msg *) cqe;
1623 if (reject->data_length) {
1624 bnx2i_get_rq_buf(bnx2i_conn, conn->data, reject->data_length);
1625 bnx2i_put_rq_buf(bnx2i_conn, 1);
1626 } else
1627 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
1628
1629 spin_lock(&session->lock);
1630 hdr = (struct iscsi_reject *) &bnx2i_conn->gen_pdu.resp_hdr;
1631 memset(hdr, 0, sizeof(struct iscsi_hdr));
1632 hdr->opcode = reject->op_code;
1633 hdr->reason = reject->reason;
1634 hton24(hdr->dlength, reject->data_length);
1635 hdr->max_cmdsn = cpu_to_be32(reject->max_cmd_sn);
1636 hdr->exp_cmdsn = cpu_to_be32(reject->exp_cmd_sn);
1637 hdr->ffffffff = cpu_to_be32(RESERVED_ITT);
1638 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, conn->data,
1639 reject->data_length);
1640 spin_unlock(&session->lock);
1641 }
1642
1643 /**
1644 * bnx2i_process_cmd_cleanup_resp - process scsi command clean-up completion
1645 * @session: iscsi session pointer
1646 * @bnx2i_conn: iscsi connection pointer
1647 * @cqe: pointer to newly DMA'ed CQE entry for processing
1648 *
1649 * process command cleanup response CQE during conn shutdown or error recovery
1650 */
1651 static void bnx2i_process_cmd_cleanup_resp(struct iscsi_session *session,
1652 struct bnx2i_conn *bnx2i_conn,
1653 struct cqe *cqe)
1654 {
1655 struct bnx2i_cleanup_response *cmd_clean_rsp;
1656 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1657 struct iscsi_task *task;
1658
1659 cmd_clean_rsp = (struct bnx2i_cleanup_response *)cqe;
1660 spin_lock(&session->lock);
1661 task = iscsi_itt_to_task(conn,
1662 cmd_clean_rsp->itt & ISCSI_CLEANUP_RESPONSE_INDEX);
1663 if (!task)
1664 printk(KERN_ALERT "bnx2i: cmd clean ITT %x not active\n",
1665 cmd_clean_rsp->itt & ISCSI_CLEANUP_RESPONSE_INDEX);
1666 spin_unlock(&session->lock);
1667 complete(&bnx2i_conn->cmd_cleanup_cmpl);
1668 }
1669
1670
1671
1672 /**
1673 * bnx2i_process_new_cqes - process newly DMA'ed CQE's
1674 * @bnx2i_conn: iscsi connection
1675 *
1676 * this function is called by generic KCQ handler to process all pending CQE's
1677 */
1678 static void bnx2i_process_new_cqes(struct bnx2i_conn *bnx2i_conn)
1679 {
1680 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1681 struct iscsi_session *session = conn->session;
1682 struct qp_info *qp = &bnx2i_conn->ep->qp;
1683 struct bnx2i_nop_in_msg *nopin;
1684 int tgt_async_msg;
1685
1686 while (1) {
1687 nopin = (struct bnx2i_nop_in_msg *) qp->cq_cons_qe;
1688 if (nopin->cq_req_sn != qp->cqe_exp_seq_sn)
1689 break;
1690
1691 if (unlikely(test_bit(ISCSI_SUSPEND_BIT, &conn->suspend_rx)))
1692 break;
1693
1694 tgt_async_msg = 0;
1695
1696 switch (nopin->op_code) {
1697 case ISCSI_OP_SCSI_CMD_RSP:
1698 case ISCSI_OP_SCSI_DATA_IN:
1699 bnx2i_process_scsi_cmd_resp(session, bnx2i_conn,
1700 qp->cq_cons_qe);
1701 break;
1702 case ISCSI_OP_LOGIN_RSP:
1703 bnx2i_process_login_resp(session, bnx2i_conn,
1704 qp->cq_cons_qe);
1705 break;
1706 case ISCSI_OP_SCSI_TMFUNC_RSP:
1707 bnx2i_process_tmf_resp(session, bnx2i_conn,
1708 qp->cq_cons_qe);
1709 break;
1710 case ISCSI_OP_LOGOUT_RSP:
1711 bnx2i_process_logout_resp(session, bnx2i_conn,
1712 qp->cq_cons_qe);
1713 break;
1714 case ISCSI_OP_NOOP_IN:
1715 if (bnx2i_process_nopin_mesg(session, bnx2i_conn,
1716 qp->cq_cons_qe))
1717 tgt_async_msg = 1;
1718 break;
1719 case ISCSI_OPCODE_NOPOUT_LOCAL_COMPLETION:
1720 bnx2i_process_nopin_local_cmpl(session, bnx2i_conn,
1721 qp->cq_cons_qe);
1722 break;
1723 case ISCSI_OP_ASYNC_EVENT:
1724 bnx2i_process_async_mesg(session, bnx2i_conn,
1725 qp->cq_cons_qe);
1726 tgt_async_msg = 1;
1727 break;
1728 case ISCSI_OP_REJECT:
1729 bnx2i_process_reject_mesg(session, bnx2i_conn,
1730 qp->cq_cons_qe);
1731 break;
1732 case ISCSI_OPCODE_CLEANUP_RESPONSE:
1733 bnx2i_process_cmd_cleanup_resp(session, bnx2i_conn,
1734 qp->cq_cons_qe);
1735 break;
1736 default:
1737 printk(KERN_ALERT "bnx2i: unknown opcode 0x%x\n",
1738 nopin->op_code);
1739 }
1740
1741 if (!tgt_async_msg)
1742 bnx2i_conn->ep->num_active_cmds--;
1743
1744 /* clear out in production version only, till beta keep opcode
1745 * field intact, will be helpful in debugging (context dump)
1746 * nopin->op_code = 0;
1747 */
1748 qp->cqe_exp_seq_sn++;
1749 if (qp->cqe_exp_seq_sn == (qp->cqe_size * 2 + 1))
1750 qp->cqe_exp_seq_sn = ISCSI_INITIAL_SN;
1751
1752 if (qp->cq_cons_qe == qp->cq_last_qe) {
1753 qp->cq_cons_qe = qp->cq_first_qe;
1754 qp->cq_cons_idx = 0;
1755 } else {
1756 qp->cq_cons_qe++;
1757 qp->cq_cons_idx++;
1758 }
1759 }
1760 bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep, CNIC_ARM_CQE);
1761 }
1762
1763 /**
1764 * bnx2i_fastpath_notification - process global event queue (KCQ)
1765 * @hba: adapter structure pointer
1766 * @new_cqe_kcqe: pointer to newly DMA'ed KCQE entry
1767 *
1768 * Fast path event notification handler, KCQ entry carries context id
1769 * of the connection that has 1 or more pending CQ entries
1770 */
1771 static void bnx2i_fastpath_notification(struct bnx2i_hba *hba,
1772 struct iscsi_kcqe *new_cqe_kcqe)
1773 {
1774 struct bnx2i_conn *conn;
1775 u32 iscsi_cid;
1776
1777 iscsi_cid = new_cqe_kcqe->iscsi_conn_id;
1778 conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
1779
1780 if (!conn) {
1781 printk(KERN_ALERT "cid #%x not valid\n", iscsi_cid);
1782 return;
1783 }
1784 if (!conn->ep) {
1785 printk(KERN_ALERT "cid #%x - ep not bound\n", iscsi_cid);
1786 return;
1787 }
1788
1789 bnx2i_process_new_cqes(conn);
1790 }
1791
1792
1793 /**
1794 * bnx2i_process_update_conn_cmpl - process iscsi conn update completion KCQE
1795 * @hba: adapter structure pointer
1796 * @update_kcqe: kcqe pointer
1797 *
1798 * CONN_UPDATE completion handler, this completes iSCSI connection FFP migration
1799 */
1800 static void bnx2i_process_update_conn_cmpl(struct bnx2i_hba *hba,
1801 struct iscsi_kcqe *update_kcqe)
1802 {
1803 struct bnx2i_conn *conn;
1804 u32 iscsi_cid;
1805
1806 iscsi_cid = update_kcqe->iscsi_conn_id;
1807 conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
1808
1809 if (!conn) {
1810 printk(KERN_ALERT "conn_update: cid %x not valid\n", iscsi_cid);
1811 return;
1812 }
1813 if (!conn->ep) {
1814 printk(KERN_ALERT "cid %x does not have ep bound\n", iscsi_cid);
1815 return;
1816 }
1817
1818 if (update_kcqe->completion_status) {
1819 printk(KERN_ALERT "request failed cid %x\n", iscsi_cid);
1820 conn->ep->state = EP_STATE_ULP_UPDATE_FAILED;
1821 } else
1822 conn->ep->state = EP_STATE_ULP_UPDATE_COMPL;
1823
1824 wake_up_interruptible(&conn->ep->ofld_wait);
1825 }
1826
1827
1828 /**
1829 * bnx2i_recovery_que_add_conn - add connection to recovery queue
1830 * @hba: adapter structure pointer
1831 * @bnx2i_conn: iscsi connection
1832 *
1833 * Add connection to recovery queue and schedule adapter eh worker
1834 */
1835 static void bnx2i_recovery_que_add_conn(struct bnx2i_hba *hba,
1836 struct bnx2i_conn *bnx2i_conn)
1837 {
1838 iscsi_conn_failure(bnx2i_conn->cls_conn->dd_data,
1839 ISCSI_ERR_CONN_FAILED);
1840 }
1841
1842
1843 /**
1844 * bnx2i_process_tcp_error - process error notification on a given connection
1845 *
1846 * @hba: adapter structure pointer
1847 * @tcp_err: tcp error kcqe pointer
1848 *
1849 * handles tcp level error notifications from FW.
1850 */
1851 static void bnx2i_process_tcp_error(struct bnx2i_hba *hba,
1852 struct iscsi_kcqe *tcp_err)
1853 {
1854 struct bnx2i_conn *bnx2i_conn;
1855 u32 iscsi_cid;
1856
1857 iscsi_cid = tcp_err->iscsi_conn_id;
1858 bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
1859
1860 if (!bnx2i_conn) {
1861 printk(KERN_ALERT "bnx2i - cid 0x%x not valid\n", iscsi_cid);
1862 return;
1863 }
1864
1865 printk(KERN_ALERT "bnx2i - cid 0x%x had TCP errors, error code 0x%x\n",
1866 iscsi_cid, tcp_err->completion_status);
1867 bnx2i_recovery_que_add_conn(bnx2i_conn->hba, bnx2i_conn);
1868 }
1869
1870
1871 /**
1872 * bnx2i_process_iscsi_error - process error notification on a given connection
1873 * @hba: adapter structure pointer
1874 * @iscsi_err: iscsi error kcqe pointer
1875 *
1876 * handles iscsi error notifications from the FW. Firmware based in initial
1877 * handshake classifies iscsi protocol / TCP rfc violation into either
1878 * warning or error indications. If indication is of "Error" type, driver
1879 * will initiate session recovery for that connection/session. For
1880 * "Warning" type indication, driver will put out a system log message
1881 * (there will be only one message for each type for the life of the
1882 * session, this is to avoid un-necessarily overloading the system)
1883 */
1884 static void bnx2i_process_iscsi_error(struct bnx2i_hba *hba,
1885 struct iscsi_kcqe *iscsi_err)
1886 {
1887 struct bnx2i_conn *bnx2i_conn;
1888 u32 iscsi_cid;
1889 char warn_notice[] = "iscsi_warning";
1890 char error_notice[] = "iscsi_error";
1891 char additional_notice[64];
1892 char *message;
1893 int need_recovery;
1894 u64 err_mask64;
1895
1896 iscsi_cid = iscsi_err->iscsi_conn_id;
1897 bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
1898 if (!bnx2i_conn) {
1899 printk(KERN_ALERT "bnx2i - cid 0x%x not valid\n", iscsi_cid);
1900 return;
1901 }
1902
1903 err_mask64 = (0x1ULL << iscsi_err->completion_status);
1904
1905 if (err_mask64 & iscsi_error_mask) {
1906 need_recovery = 0;
1907 message = warn_notice;
1908 } else {
1909 need_recovery = 1;
1910 message = error_notice;
1911 }
1912
1913 switch (iscsi_err->completion_status) {
1914 case ISCSI_KCQE_COMPLETION_STATUS_HDR_DIG_ERR:
1915 strcpy(additional_notice, "hdr digest err");
1916 break;
1917 case ISCSI_KCQE_COMPLETION_STATUS_DATA_DIG_ERR:
1918 strcpy(additional_notice, "data digest err");
1919 break;
1920 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_OPCODE:
1921 strcpy(additional_notice, "wrong opcode rcvd");
1922 break;
1923 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_AHS_LEN:
1924 strcpy(additional_notice, "AHS len > 0 rcvd");
1925 break;
1926 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_ITT:
1927 strcpy(additional_notice, "invalid ITT rcvd");
1928 break;
1929 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_STATSN:
1930 strcpy(additional_notice, "wrong StatSN rcvd");
1931 break;
1932 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_EXP_DATASN:
1933 strcpy(additional_notice, "wrong DataSN rcvd");
1934 break;
1935 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T:
1936 strcpy(additional_notice, "pend R2T violation");
1937 break;
1938 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_0:
1939 strcpy(additional_notice, "ERL0, UO");
1940 break;
1941 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_1:
1942 strcpy(additional_notice, "ERL0, U1");
1943 break;
1944 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_2:
1945 strcpy(additional_notice, "ERL0, U2");
1946 break;
1947 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_3:
1948 strcpy(additional_notice, "ERL0, U3");
1949 break;
1950 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_4:
1951 strcpy(additional_notice, "ERL0, U4");
1952 break;
1953 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_5:
1954 strcpy(additional_notice, "ERL0, U5");
1955 break;
1956 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_6:
1957 strcpy(additional_notice, "ERL0, U6");
1958 break;
1959 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REMAIN_RCV_LEN:
1960 strcpy(additional_notice, "invalid resi len");
1961 break;
1962 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_MAX_RCV_PDU_LEN:
1963 strcpy(additional_notice, "MRDSL violation");
1964 break;
1965 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_F_BIT_ZERO:
1966 strcpy(additional_notice, "F-bit not set");
1967 break;
1968 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_NOT_RSRV:
1969 strcpy(additional_notice, "invalid TTT");
1970 break;
1971 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DATASN:
1972 strcpy(additional_notice, "invalid DataSN");
1973 break;
1974 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REMAIN_BURST_LEN:
1975 strcpy(additional_notice, "burst len violation");
1976 break;
1977 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_BUFFER_OFF:
1978 strcpy(additional_notice, "buf offset violation");
1979 break;
1980 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_LUN:
1981 strcpy(additional_notice, "invalid LUN field");
1982 break;
1983 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_R2TSN:
1984 strcpy(additional_notice, "invalid R2TSN field");
1985 break;
1986 #define BNX2I_ERR_DESIRED_DATA_TRNS_LEN_0 \
1987 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_0
1988 case BNX2I_ERR_DESIRED_DATA_TRNS_LEN_0:
1989 strcpy(additional_notice, "invalid cmd len1");
1990 break;
1991 #define BNX2I_ERR_DESIRED_DATA_TRNS_LEN_1 \
1992 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_1
1993 case BNX2I_ERR_DESIRED_DATA_TRNS_LEN_1:
1994 strcpy(additional_notice, "invalid cmd len2");
1995 break;
1996 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T_EXCEED:
1997 strcpy(additional_notice,
1998 "pend r2t exceeds MaxOutstandingR2T value");
1999 break;
2000 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_IS_RSRV:
2001 strcpy(additional_notice, "TTT is rsvd");
2002 break;
2003 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_MAX_BURST_LEN:
2004 strcpy(additional_notice, "MBL violation");
2005 break;
2006 #define BNX2I_ERR_DATA_SEG_LEN_NOT_ZERO \
2007 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DATA_SEG_LEN_NOT_ZERO
2008 case BNX2I_ERR_DATA_SEG_LEN_NOT_ZERO:
2009 strcpy(additional_notice, "data seg len != 0");
2010 break;
2011 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REJECT_PDU_LEN:
2012 strcpy(additional_notice, "reject pdu len error");
2013 break;
2014 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_ASYNC_PDU_LEN:
2015 strcpy(additional_notice, "async pdu len error");
2016 break;
2017 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_NOPIN_PDU_LEN:
2018 strcpy(additional_notice, "nopin pdu len error");
2019 break;
2020 #define BNX2_ERR_PEND_R2T_IN_CLEANUP \
2021 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T_IN_CLEANUP
2022 case BNX2_ERR_PEND_R2T_IN_CLEANUP:
2023 strcpy(additional_notice, "pend r2t in cleanup");
2024 break;
2025
2026 case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_IP_FRAGMENT:
2027 strcpy(additional_notice, "IP fragments rcvd");
2028 break;
2029 case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_IP_OPTIONS:
2030 strcpy(additional_notice, "IP options error");
2031 break;
2032 case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_URGENT_FLAG:
2033 strcpy(additional_notice, "urgent flag error");
2034 break;
2035 default:
2036 printk(KERN_ALERT "iscsi_err - unknown err %x\n",
2037 iscsi_err->completion_status);
2038 }
2039
2040 if (need_recovery) {
2041 iscsi_conn_printk(KERN_ALERT,
2042 bnx2i_conn->cls_conn->dd_data,
2043 "bnx2i: %s - %s\n",
2044 message, additional_notice);
2045
2046 iscsi_conn_printk(KERN_ALERT,
2047 bnx2i_conn->cls_conn->dd_data,
2048 "conn_err - hostno %d conn %p, "
2049 "iscsi_cid %x cid %x\n",
2050 bnx2i_conn->hba->shost->host_no,
2051 bnx2i_conn, bnx2i_conn->ep->ep_iscsi_cid,
2052 bnx2i_conn->ep->ep_cid);
2053 bnx2i_recovery_que_add_conn(bnx2i_conn->hba, bnx2i_conn);
2054 } else
2055 if (!test_and_set_bit(iscsi_err->completion_status,
2056 (void *) &bnx2i_conn->violation_notified))
2057 iscsi_conn_printk(KERN_ALERT,
2058 bnx2i_conn->cls_conn->dd_data,
2059 "bnx2i: %s - %s\n",
2060 message, additional_notice);
2061 }
2062
2063
2064 /**
2065 * bnx2i_process_conn_destroy_cmpl - process iscsi conn destroy completion
2066 * @hba: adapter structure pointer
2067 * @conn_destroy: conn destroy kcqe pointer
2068 *
2069 * handles connection destroy completion request.
2070 */
2071 static void bnx2i_process_conn_destroy_cmpl(struct bnx2i_hba *hba,
2072 struct iscsi_kcqe *conn_destroy)
2073 {
2074 struct bnx2i_endpoint *ep;
2075
2076 ep = bnx2i_find_ep_in_destroy_list(hba, conn_destroy->iscsi_conn_id);
2077 if (!ep) {
2078 printk(KERN_ALERT "bnx2i_conn_destroy_cmpl: no pending "
2079 "offload request, unexpected complection\n");
2080 return;
2081 }
2082
2083 if (hba != ep->hba) {
2084 printk(KERN_ALERT "conn destroy- error hba mis-match\n");
2085 return;
2086 }
2087
2088 if (conn_destroy->completion_status) {
2089 printk(KERN_ALERT "conn_destroy_cmpl: op failed\n");
2090 ep->state = EP_STATE_CLEANUP_FAILED;
2091 } else
2092 ep->state = EP_STATE_CLEANUP_CMPL;
2093 wake_up_interruptible(&ep->ofld_wait);
2094 }
2095
2096
2097 /**
2098 * bnx2i_process_ofld_cmpl - process initial iscsi conn offload completion
2099 * @hba: adapter structure pointer
2100 * @ofld_kcqe: conn offload kcqe pointer
2101 *
2102 * handles initial connection offload completion, ep_connect() thread is
2103 * woken-up to continue with LLP connect process
2104 */
2105 static void bnx2i_process_ofld_cmpl(struct bnx2i_hba *hba,
2106 struct iscsi_kcqe *ofld_kcqe)
2107 {
2108 u32 cid_addr;
2109 struct bnx2i_endpoint *ep;
2110 u32 cid_num;
2111
2112 ep = bnx2i_find_ep_in_ofld_list(hba, ofld_kcqe->iscsi_conn_id);
2113 if (!ep) {
2114 printk(KERN_ALERT "ofld_cmpl: no pend offload request\n");
2115 return;
2116 }
2117
2118 if (hba != ep->hba) {
2119 printk(KERN_ALERT "ofld_cmpl: error hba mis-match\n");
2120 return;
2121 }
2122
2123 if (ofld_kcqe->completion_status) {
2124 if (ofld_kcqe->completion_status ==
2125 ISCSI_KCQE_COMPLETION_STATUS_CTX_ALLOC_FAILURE)
2126 printk(KERN_ALERT "bnx2i: unable to allocate"
2127 " iSCSI context resources\n");
2128 ep->state = EP_STATE_OFLD_FAILED;
2129 } else {
2130 ep->state = EP_STATE_OFLD_COMPL;
2131 cid_addr = ofld_kcqe->iscsi_conn_context_id;
2132 cid_num = bnx2i_get_cid_num(ep);
2133 ep->ep_cid = cid_addr;
2134 ep->qp.ctx_base = NULL;
2135 }
2136 wake_up_interruptible(&ep->ofld_wait);
2137 }
2138
2139 /**
2140 * bnx2i_indicate_kcqe - process iscsi conn update completion KCQE
2141 * @hba: adapter structure pointer
2142 * @update_kcqe: kcqe pointer
2143 *
2144 * Generic KCQ event handler/dispatcher
2145 */
2146 static void bnx2i_indicate_kcqe(void *context, struct kcqe *kcqe[],
2147 u32 num_cqe)
2148 {
2149 struct bnx2i_hba *hba = context;
2150 int i = 0;
2151 struct iscsi_kcqe *ikcqe = NULL;
2152
2153 while (i < num_cqe) {
2154 ikcqe = (struct iscsi_kcqe *) kcqe[i++];
2155
2156 if (ikcqe->op_code ==
2157 ISCSI_KCQE_OPCODE_CQ_EVENT_NOTIFICATION)
2158 bnx2i_fastpath_notification(hba, ikcqe);
2159 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_OFFLOAD_CONN)
2160 bnx2i_process_ofld_cmpl(hba, ikcqe);
2161 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_UPDATE_CONN)
2162 bnx2i_process_update_conn_cmpl(hba, ikcqe);
2163 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_INIT) {
2164 if (ikcqe->completion_status !=
2165 ISCSI_KCQE_COMPLETION_STATUS_SUCCESS)
2166 bnx2i_iscsi_license_error(hba, ikcqe->\
2167 completion_status);
2168 else {
2169 set_bit(ADAPTER_STATE_UP, &hba->adapter_state);
2170 bnx2i_get_link_state(hba);
2171 printk(KERN_INFO "bnx2i [%.2x:%.2x.%.2x]: "
2172 "ISCSI_INIT passed\n",
2173 (u8)hba->pcidev->bus->number,
2174 hba->pci_devno,
2175 (u8)hba->pci_func);
2176
2177
2178 }
2179 } else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_DESTROY_CONN)
2180 bnx2i_process_conn_destroy_cmpl(hba, ikcqe);
2181 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_ISCSI_ERROR)
2182 bnx2i_process_iscsi_error(hba, ikcqe);
2183 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_TCP_ERROR)
2184 bnx2i_process_tcp_error(hba, ikcqe);
2185 else
2186 printk(KERN_ALERT "bnx2i: unknown opcode 0x%x\n",
2187 ikcqe->op_code);
2188 }
2189 }
2190
2191
2192 /**
2193 * bnx2i_indicate_netevent - Generic netdev event handler
2194 * @context: adapter structure pointer
2195 * @event: event type
2196 *
2197 * Handles four netdev events, NETDEV_UP, NETDEV_DOWN,
2198 * NETDEV_GOING_DOWN and NETDEV_CHANGE
2199 */
2200 static void bnx2i_indicate_netevent(void *context, unsigned long event)
2201 {
2202 struct bnx2i_hba *hba = context;
2203
2204 switch (event) {
2205 case NETDEV_UP:
2206 if (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state))
2207 bnx2i_send_fw_iscsi_init_msg(hba);
2208 break;
2209 case NETDEV_DOWN:
2210 clear_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state);
2211 clear_bit(ADAPTER_STATE_UP, &hba->adapter_state);
2212 break;
2213 case NETDEV_GOING_DOWN:
2214 set_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state);
2215 iscsi_host_for_each_session(hba->shost,
2216 bnx2i_drop_session);
2217 break;
2218 case NETDEV_CHANGE:
2219 bnx2i_get_link_state(hba);
2220 break;
2221 default:
2222 ;
2223 }
2224 }
2225
2226
2227 /**
2228 * bnx2i_cm_connect_cmpl - process iscsi conn establishment completion
2229 * @cm_sk: cnic sock structure pointer
2230 *
2231 * function callback exported via bnx2i - cnic driver interface to
2232 * indicate completion of option-2 TCP connect request.
2233 */
2234 static void bnx2i_cm_connect_cmpl(struct cnic_sock *cm_sk)
2235 {
2236 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2237
2238 if (test_bit(ADAPTER_STATE_GOING_DOWN, &ep->hba->adapter_state))
2239 ep->state = EP_STATE_CONNECT_FAILED;
2240 else if (test_bit(SK_F_OFFLD_COMPLETE, &cm_sk->flags))
2241 ep->state = EP_STATE_CONNECT_COMPL;
2242 else
2243 ep->state = EP_STATE_CONNECT_FAILED;
2244
2245 wake_up_interruptible(&ep->ofld_wait);
2246 }
2247
2248
2249 /**
2250 * bnx2i_cm_close_cmpl - process tcp conn close completion
2251 * @cm_sk: cnic sock structure pointer
2252 *
2253 * function callback exported via bnx2i - cnic driver interface to
2254 * indicate completion of option-2 graceful TCP connect shutdown
2255 */
2256 static void bnx2i_cm_close_cmpl(struct cnic_sock *cm_sk)
2257 {
2258 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2259
2260 ep->state = EP_STATE_DISCONN_COMPL;
2261 wake_up_interruptible(&ep->ofld_wait);
2262 }
2263
2264
2265 /**
2266 * bnx2i_cm_abort_cmpl - process abortive tcp conn teardown completion
2267 * @cm_sk: cnic sock structure pointer
2268 *
2269 * function callback exported via bnx2i - cnic driver interface to
2270 * indicate completion of option-2 abortive TCP connect termination
2271 */
2272 static void bnx2i_cm_abort_cmpl(struct cnic_sock *cm_sk)
2273 {
2274 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2275
2276 ep->state = EP_STATE_DISCONN_COMPL;
2277 wake_up_interruptible(&ep->ofld_wait);
2278 }
2279
2280
2281 /**
2282 * bnx2i_cm_remote_close - process received TCP FIN
2283 * @hba: adapter structure pointer
2284 * @update_kcqe: kcqe pointer
2285 *
2286 * function callback exported via bnx2i - cnic driver interface to indicate
2287 * async TCP events such as FIN
2288 */
2289 static void bnx2i_cm_remote_close(struct cnic_sock *cm_sk)
2290 {
2291 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2292
2293 ep->state = EP_STATE_TCP_FIN_RCVD;
2294 if (ep->conn)
2295 bnx2i_recovery_que_add_conn(ep->hba, ep->conn);
2296 }
2297
2298 /**
2299 * bnx2i_cm_remote_abort - process TCP RST and start conn cleanup
2300 * @hba: adapter structure pointer
2301 * @update_kcqe: kcqe pointer
2302 *
2303 * function callback exported via bnx2i - cnic driver interface to
2304 * indicate async TCP events (RST) sent by the peer.
2305 */
2306 static void bnx2i_cm_remote_abort(struct cnic_sock *cm_sk)
2307 {
2308 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2309
2310 ep->state = EP_STATE_TCP_RST_RCVD;
2311 if (ep->conn)
2312 bnx2i_recovery_que_add_conn(ep->hba, ep->conn);
2313 }
2314
2315
2316 static void bnx2i_send_nl_mesg(struct cnic_dev *dev, u32 msg_type,
2317 char *buf, u16 buflen)
2318 {
2319 struct bnx2i_hba *hba;
2320
2321 hba = bnx2i_find_hba_for_cnic(dev);
2322 if (!hba)
2323 return;
2324
2325 if (iscsi_offload_mesg(hba->shost, &bnx2i_iscsi_transport,
2326 msg_type, buf, buflen))
2327 printk(KERN_ALERT "bnx2i: private nl message send error\n");
2328
2329 }
2330
2331
2332 /**
2333 * bnx2i_cnic_cb - global template of bnx2i - cnic driver interface structure
2334 * carrying callback function pointers
2335 *
2336 */
2337 struct cnic_ulp_ops bnx2i_cnic_cb = {
2338 .cnic_init = bnx2i_ulp_init,
2339 .cnic_exit = bnx2i_ulp_exit,
2340 .cnic_start = bnx2i_start,
2341 .cnic_stop = bnx2i_stop,
2342 .indicate_kcqes = bnx2i_indicate_kcqe,
2343 .indicate_netevent = bnx2i_indicate_netevent,
2344 .cm_connect_complete = bnx2i_cm_connect_cmpl,
2345 .cm_close_complete = bnx2i_cm_close_cmpl,
2346 .cm_abort_complete = bnx2i_cm_abort_cmpl,
2347 .cm_remote_close = bnx2i_cm_remote_close,
2348 .cm_remote_abort = bnx2i_cm_remote_abort,
2349 .iscsi_nl_send_msg = bnx2i_send_nl_mesg,
2350 .owner = THIS_MODULE
2351 };
2352
2353
2354 /**
2355 * bnx2i_map_ep_dbell_regs - map connection doorbell registers
2356 * @ep: bnx2i endpoint
2357 *
2358 * maps connection's SQ and RQ doorbell registers, 5706/5708/5709 hosts these
2359 * register in BAR #0. Whereas in 57710 these register are accessed by
2360 * mapping BAR #1
2361 */
2362 int bnx2i_map_ep_dbell_regs(struct bnx2i_endpoint *ep)
2363 {
2364 u32 cid_num;
2365 u32 reg_off;
2366 u32 first_l4l5;
2367 u32 ctx_sz;
2368 u32 config2;
2369 resource_size_t reg_base;
2370
2371 cid_num = bnx2i_get_cid_num(ep);
2372
2373 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
2374 reg_base = pci_resource_start(ep->hba->pcidev,
2375 BNX2X_DOORBELL_PCI_BAR);
2376 reg_off = PAGE_SIZE * (cid_num & 0x1FFFF) + DPM_TRIGER_TYPE;
2377 ep->qp.ctx_base = ioremap_nocache(reg_base + reg_off, 4);
2378 goto arm_cq;
2379 }
2380
2381 reg_base = ep->hba->netdev->base_addr;
2382 if ((test_bit(BNX2I_NX2_DEV_5709, &ep->hba->cnic_dev_type)) &&
2383 (ep->hba->mail_queue_access == BNX2I_MQ_BIN_MODE)) {
2384 config2 = REG_RD(ep->hba, BNX2_MQ_CONFIG2);
2385 first_l4l5 = config2 & BNX2_MQ_CONFIG2_FIRST_L4L5;
2386 ctx_sz = (config2 & BNX2_MQ_CONFIG2_CONT_SZ) >> 3;
2387 if (ctx_sz)
2388 reg_off = CTX_OFFSET + MAX_CID_CNT * MB_KERNEL_CTX_SIZE
2389 + PAGE_SIZE *
2390 (((cid_num - first_l4l5) / ctx_sz) + 256);
2391 else
2392 reg_off = CTX_OFFSET + (MB_KERNEL_CTX_SIZE * cid_num);
2393 } else
2394 /* 5709 device in normal node and 5706/5708 devices */
2395 reg_off = CTX_OFFSET + (MB_KERNEL_CTX_SIZE * cid_num);
2396
2397 ep->qp.ctx_base = ioremap_nocache(reg_base + reg_off,
2398 MB_KERNEL_CTX_SIZE);
2399 if (!ep->qp.ctx_base)
2400 return -ENOMEM;
2401
2402 arm_cq:
2403 bnx2i_arm_cq_event_coalescing(ep, CNIC_ARM_CQE);
2404 return 0;
2405 }
linux 2.6 git repository for openrd