1 /* bnx2i_hwi.c: QLogic NetXtreme II iSCSI driver.
2 *
3 * Copyright (c) 2006 - 2013 Broadcom Corporation
4 * Copyright (c) 2007, 2008 Red Hat, Inc. All rights reserved.
5 * Copyright (c) 2007, 2008 Mike Christie
6 * Copyright (c) 2014, QLogic Corporation
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation.
11 *
12 * Written by: Anil Veerabhadrappa (anilgv@broadcom.com)
13 * Previously Maintained by: Eddie Wai (eddie.wai@broadcom.com)
14 * Maintained by: QLogic-Storage-Upstream@qlogic.com
15 */
16
17 #include <linux/gfp.h>
18 #include <scsi/scsi_tcq.h>
19 #include <scsi/libiscsi.h>
20 #include "bnx2i.h"
21
22 DECLARE_PER_CPU(struct bnx2i_percpu_s, bnx2i_percpu);
23
24 /**
25 * bnx2i_get_cid_num - get cid from ep
26 * @ep: endpoint pointer
27 *
28 * Only applicable to 57710 family of devices
29 */
bnx2i_get_cid_num(struct bnx2i_endpoint * ep)30 static u32 bnx2i_get_cid_num(struct bnx2i_endpoint *ep)
31 {
32 u32 cid;
33
34 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
35 cid = ep->ep_cid;
36 else
37 cid = GET_CID_NUM(ep->ep_cid);
38 return cid;
39 }
40
41
42 /**
43 * bnx2i_adjust_qp_size - Adjust SQ/RQ/CQ size for 57710 device type
44 * @hba: Adapter for which adjustments is to be made
45 *
46 * Only applicable to 57710 family of devices
47 */
bnx2i_adjust_qp_size(struct bnx2i_hba * hba)48 static void bnx2i_adjust_qp_size(struct bnx2i_hba *hba)
49 {
50 u32 num_elements_per_pg;
51
52 if (test_bit(BNX2I_NX2_DEV_5706, &hba->cnic_dev_type) ||
53 test_bit(BNX2I_NX2_DEV_5708, &hba->cnic_dev_type) ||
54 test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type)) {
55 if (!is_power_of_2(hba->max_sqes))
56 hba->max_sqes = rounddown_pow_of_two(hba->max_sqes);
57
58 if (!is_power_of_2(hba->max_rqes))
59 hba->max_rqes = rounddown_pow_of_two(hba->max_rqes);
60 }
61
62 /* Adjust each queue size if the user selection does not
63 * yield integral num of page buffers
64 */
65 /* adjust SQ */
66 num_elements_per_pg = CNIC_PAGE_SIZE / BNX2I_SQ_WQE_SIZE;
67 if (hba->max_sqes < num_elements_per_pg)
68 hba->max_sqes = num_elements_per_pg;
69 else if (hba->max_sqes % num_elements_per_pg)
70 hba->max_sqes = (hba->max_sqes + num_elements_per_pg - 1) &
71 ~(num_elements_per_pg - 1);
72
73 /* adjust CQ */
74 num_elements_per_pg = CNIC_PAGE_SIZE / BNX2I_CQE_SIZE;
75 if (hba->max_cqes < num_elements_per_pg)
76 hba->max_cqes = num_elements_per_pg;
77 else if (hba->max_cqes % num_elements_per_pg)
78 hba->max_cqes = (hba->max_cqes + num_elements_per_pg - 1) &
79 ~(num_elements_per_pg - 1);
80
81 /* adjust RQ */
82 num_elements_per_pg = CNIC_PAGE_SIZE / BNX2I_RQ_WQE_SIZE;
83 if (hba->max_rqes < num_elements_per_pg)
84 hba->max_rqes = num_elements_per_pg;
85 else if (hba->max_rqes % num_elements_per_pg)
86 hba->max_rqes = (hba->max_rqes + num_elements_per_pg - 1) &
87 ~(num_elements_per_pg - 1);
88 }
89
90
91 /**
92 * bnx2i_get_link_state - get network interface link state
93 * @hba: adapter instance pointer
94 *
95 * updates adapter structure flag based on netdev state
96 */
bnx2i_get_link_state(struct bnx2i_hba * hba)97 static void bnx2i_get_link_state(struct bnx2i_hba *hba)
98 {
99 if (test_bit(__LINK_STATE_NOCARRIER, &hba->netdev->state))
100 set_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state);
101 else
102 clear_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state);
103 }
104
105
106 /**
107 * bnx2i_iscsi_license_error - displays iscsi license related error message
108 * @hba: adapter instance pointer
109 * @error_code: error classification
110 *
111 * Puts out an error log when driver is unable to offload iscsi connection
112 * due to license restrictions
113 */
bnx2i_iscsi_license_error(struct bnx2i_hba * hba,u32 error_code)114 static void bnx2i_iscsi_license_error(struct bnx2i_hba *hba, u32 error_code)
115 {
116 if (error_code == ISCSI_KCQE_COMPLETION_STATUS_ISCSI_NOT_SUPPORTED)
117 /* iSCSI offload not supported on this device */
118 printk(KERN_ERR "bnx2i: iSCSI not supported, dev=%s\n",
119 hba->netdev->name);
120 if (error_code == ISCSI_KCQE_COMPLETION_STATUS_LOM_ISCSI_NOT_ENABLED)
121 /* iSCSI offload not supported on this LOM device */
122 printk(KERN_ERR "bnx2i: LOM is not enable to "
123 "offload iSCSI connections, dev=%s\n",
124 hba->netdev->name);
125 set_bit(ADAPTER_STATE_INIT_FAILED, &hba->adapter_state);
126 }
127
128
129 /**
130 * bnx2i_arm_cq_event_coalescing - arms CQ to enable EQ notification
131 * @ep: endpoint (transport identifier) structure
132 * @action: action, ARM or DISARM. For now only ARM_CQE is used
133 *
134 * Arm'ing CQ will enable chip to generate global EQ events inorder to interrupt
135 * the driver. EQ event is generated CQ index is hit or at least 1 CQ is
136 * outstanding and on chip timer expires
137 */
bnx2i_arm_cq_event_coalescing(struct bnx2i_endpoint * ep,u8 action)138 int bnx2i_arm_cq_event_coalescing(struct bnx2i_endpoint *ep, u8 action)
139 {
140 struct bnx2i_5771x_cq_db *cq_db;
141 u16 cq_index;
142 u16 next_index = 0;
143 u32 num_active_cmds;
144
145 /* Coalesce CQ entries only on 10G devices */
146 if (!test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
147 return 0;
148
149 /* Do not update CQ DB multiple times before firmware writes
150 * '0xFFFF' to CQDB->SQN field. Deviation may cause spurious
151 * interrupts and other unwanted results
152 */
153 cq_db = (struct bnx2i_5771x_cq_db *) ep->qp.cq_pgtbl_virt;
154
155 if (action != CNIC_ARM_CQE_FP)
156 if (cq_db->sqn[0] && cq_db->sqn[0] != 0xFFFF)
157 return 0;
158
159 if (action == CNIC_ARM_CQE || action == CNIC_ARM_CQE_FP) {
160 num_active_cmds = atomic_read(&ep->num_active_cmds);
161 if (num_active_cmds <= event_coal_min)
162 next_index = 1;
163 else {
164 next_index = num_active_cmds >> ep->ec_shift;
165 if (next_index > num_active_cmds - event_coal_min)
166 next_index = num_active_cmds - event_coal_min;
167 }
168 if (!next_index)
169 next_index = 1;
170 cq_index = ep->qp.cqe_exp_seq_sn + next_index - 1;
171 if (cq_index > ep->qp.cqe_size * 2)
172 cq_index -= ep->qp.cqe_size * 2;
173 if (!cq_index)
174 cq_index = 1;
175
176 cq_db->sqn[0] = cq_index;
177 }
178 return next_index;
179 }
180
181
182 /**
183 * bnx2i_get_rq_buf - copy RQ buffer contents to driver buffer
184 * @bnx2i_conn: iscsi connection on which RQ event occurred
185 * @ptr: driver buffer to which RQ buffer contents is to
186 * be copied
187 * @len: length of valid data inside RQ buf
188 *
189 * Copies RQ buffer contents from shared (DMA'able) memory region to
190 * driver buffer. RQ is used to DMA unsolicitated iscsi pdu's and
191 * scsi sense info
192 */
bnx2i_get_rq_buf(struct bnx2i_conn * bnx2i_conn,char * ptr,int len)193 void bnx2i_get_rq_buf(struct bnx2i_conn *bnx2i_conn, char *ptr, int len)
194 {
195 if (!bnx2i_conn->ep->qp.rqe_left)
196 return;
197
198 bnx2i_conn->ep->qp.rqe_left--;
199 memcpy(ptr, (u8 *) bnx2i_conn->ep->qp.rq_cons_qe, len);
200 if (bnx2i_conn->ep->qp.rq_cons_qe == bnx2i_conn->ep->qp.rq_last_qe) {
201 bnx2i_conn->ep->qp.rq_cons_qe = bnx2i_conn->ep->qp.rq_first_qe;
202 bnx2i_conn->ep->qp.rq_cons_idx = 0;
203 } else {
204 bnx2i_conn->ep->qp.rq_cons_qe++;
205 bnx2i_conn->ep->qp.rq_cons_idx++;
206 }
207 }
208
209
bnx2i_ring_577xx_doorbell(struct bnx2i_conn * conn)210 static void bnx2i_ring_577xx_doorbell(struct bnx2i_conn *conn)
211 {
212 struct bnx2i_5771x_dbell dbell;
213 u32 msg;
214
215 memset(&dbell, 0, sizeof(dbell));
216 dbell.dbell.header = (B577XX_ISCSI_CONNECTION_TYPE <<
217 B577XX_DOORBELL_HDR_CONN_TYPE_SHIFT);
218 msg = *((u32 *)&dbell);
219 /* TODO : get doorbell register mapping */
220 writel(cpu_to_le32(msg), conn->ep->qp.ctx_base);
221 }
222
223
224 /**
225 * bnx2i_put_rq_buf - Replenish RQ buffer, if required ring on chip doorbell
226 * @bnx2i_conn: iscsi connection on which event to post
227 * @count: number of RQ buffer being posted to chip
228 *
229 * No need to ring hardware doorbell for 57710 family of devices
230 */
bnx2i_put_rq_buf(struct bnx2i_conn * bnx2i_conn,int count)231 void bnx2i_put_rq_buf(struct bnx2i_conn *bnx2i_conn, int count)
232 {
233 struct bnx2i_5771x_sq_rq_db *rq_db;
234 u16 hi_bit = (bnx2i_conn->ep->qp.rq_prod_idx & 0x8000);
235 struct bnx2i_endpoint *ep = bnx2i_conn->ep;
236
237 ep->qp.rqe_left += count;
238 ep->qp.rq_prod_idx &= 0x7FFF;
239 ep->qp.rq_prod_idx += count;
240
241 if (ep->qp.rq_prod_idx > bnx2i_conn->hba->max_rqes) {
242 ep->qp.rq_prod_idx %= bnx2i_conn->hba->max_rqes;
243 if (!hi_bit)
244 ep->qp.rq_prod_idx |= 0x8000;
245 } else
246 ep->qp.rq_prod_idx |= hi_bit;
247
248 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
249 rq_db = (struct bnx2i_5771x_sq_rq_db *) ep->qp.rq_pgtbl_virt;
250 rq_db->prod_idx = ep->qp.rq_prod_idx;
251 /* no need to ring hardware doorbell for 57710 */
252 } else {
253 writew(ep->qp.rq_prod_idx,
254 ep->qp.ctx_base + CNIC_RECV_DOORBELL);
255 }
256 }
257
258
259 /**
260 * bnx2i_ring_sq_dbell - Ring SQ doorbell to wake-up the processing engine
261 * @bnx2i_conn: iscsi connection to which new SQ entries belong
262 * @count: number of SQ WQEs to post
263 *
264 * SQ DB is updated in host memory and TX Doorbell is rung for 57710 family
265 * of devices. For 5706/5708/5709 new SQ WQE count is written into the
266 * doorbell register
267 */
bnx2i_ring_sq_dbell(struct bnx2i_conn * bnx2i_conn,int count)268 static void bnx2i_ring_sq_dbell(struct bnx2i_conn *bnx2i_conn, int count)
269 {
270 struct bnx2i_5771x_sq_rq_db *sq_db;
271 struct bnx2i_endpoint *ep = bnx2i_conn->ep;
272
273 atomic_inc(&ep->num_active_cmds);
274 wmb(); /* flush SQ WQE memory before the doorbell is rung */
275 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
276 sq_db = (struct bnx2i_5771x_sq_rq_db *) ep->qp.sq_pgtbl_virt;
277 sq_db->prod_idx = ep->qp.sq_prod_idx;
278 bnx2i_ring_577xx_doorbell(bnx2i_conn);
279 } else
280 writew(count, ep->qp.ctx_base + CNIC_SEND_DOORBELL);
281 }
282
283
284 /**
285 * bnx2i_ring_dbell_update_sq_params - update SQ driver parameters
286 * @bnx2i_conn: iscsi connection to which new SQ entries belong
287 * @count: number of SQ WQEs to post
288 *
289 * this routine will update SQ driver parameters and ring the doorbell
290 */
bnx2i_ring_dbell_update_sq_params(struct bnx2i_conn * bnx2i_conn,int count)291 static void bnx2i_ring_dbell_update_sq_params(struct bnx2i_conn *bnx2i_conn,
292 int count)
293 {
294 int tmp_cnt;
295
296 if (count == 1) {
297 if (bnx2i_conn->ep->qp.sq_prod_qe ==
298 bnx2i_conn->ep->qp.sq_last_qe)
299 bnx2i_conn->ep->qp.sq_prod_qe =
300 bnx2i_conn->ep->qp.sq_first_qe;
301 else
302 bnx2i_conn->ep->qp.sq_prod_qe++;
303 } else {
304 if ((bnx2i_conn->ep->qp.sq_prod_qe + count) <=
305 bnx2i_conn->ep->qp.sq_last_qe)
306 bnx2i_conn->ep->qp.sq_prod_qe += count;
307 else {
308 tmp_cnt = bnx2i_conn->ep->qp.sq_last_qe -
309 bnx2i_conn->ep->qp.sq_prod_qe;
310 bnx2i_conn->ep->qp.sq_prod_qe =
311 &bnx2i_conn->ep->qp.sq_first_qe[count -
312 (tmp_cnt + 1)];
313 }
314 }
315 bnx2i_conn->ep->qp.sq_prod_idx += count;
316 /* Ring the doorbell */
317 bnx2i_ring_sq_dbell(bnx2i_conn, bnx2i_conn->ep->qp.sq_prod_idx);
318 }
319
320
321 /**
322 * bnx2i_send_iscsi_login - post iSCSI login request MP WQE to hardware
323 * @bnx2i_conn: iscsi connection
324 * @task: transport layer's command structure pointer which is requesting
325 * a WQE to sent to chip for further processing
326 *
327 * prepare and post an iSCSI Login request WQE to CNIC firmware
328 */
bnx2i_send_iscsi_login(struct bnx2i_conn * bnx2i_conn,struct iscsi_task * task)329 int bnx2i_send_iscsi_login(struct bnx2i_conn *bnx2i_conn,
330 struct iscsi_task *task)
331 {
332 struct bnx2i_login_request *login_wqe;
333 struct iscsi_login_req *login_hdr;
334 u32 dword;
335
336 login_hdr = (struct iscsi_login_req *)task->hdr;
337 login_wqe = (struct bnx2i_login_request *)
338 bnx2i_conn->ep->qp.sq_prod_qe;
339
340 login_wqe->op_code = login_hdr->opcode;
341 login_wqe->op_attr = login_hdr->flags;
342 login_wqe->version_max = login_hdr->max_version;
343 login_wqe->version_min = login_hdr->min_version;
344 login_wqe->data_length = ntoh24(login_hdr->dlength);
345 login_wqe->isid_lo = *((u32 *) login_hdr->isid);
346 login_wqe->isid_hi = *((u16 *) login_hdr->isid + 2);
347 login_wqe->tsih = login_hdr->tsih;
348 login_wqe->itt = task->itt |
349 (ISCSI_TASK_TYPE_MPATH << ISCSI_LOGIN_REQUEST_TYPE_SHIFT);
350 login_wqe->cid = login_hdr->cid;
351
352 login_wqe->cmd_sn = be32_to_cpu(login_hdr->cmdsn);
353 login_wqe->exp_stat_sn = be32_to_cpu(login_hdr->exp_statsn);
354 login_wqe->flags = ISCSI_LOGIN_REQUEST_UPDATE_EXP_STAT_SN;
355
356 login_wqe->resp_bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_bd_dma;
357 login_wqe->resp_bd_list_addr_hi =
358 (u32) ((u64) bnx2i_conn->gen_pdu.resp_bd_dma >> 32);
359
360 dword = ((1 << ISCSI_LOGIN_REQUEST_NUM_RESP_BDS_SHIFT) |
361 (bnx2i_conn->gen_pdu.resp_buf_size <<
362 ISCSI_LOGIN_REQUEST_RESP_BUFFER_LENGTH_SHIFT));
363 login_wqe->resp_buffer = dword;
364 login_wqe->bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.req_bd_dma;
365 login_wqe->bd_list_addr_hi =
366 (u32) ((u64) bnx2i_conn->gen_pdu.req_bd_dma >> 32);
367 login_wqe->num_bds = 1;
368 login_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
369
370 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
371 return 0;
372 }
373
374 /**
375 * bnx2i_send_iscsi_tmf - post iSCSI task management request MP WQE to hardware
376 * @bnx2i_conn: iscsi connection
377 * @mtask: driver command structure which is requesting
378 * a WQE to sent to chip for further processing
379 *
380 * prepare and post an iSCSI Login request WQE to CNIC firmware
381 */
bnx2i_send_iscsi_tmf(struct bnx2i_conn * bnx2i_conn,struct iscsi_task * mtask)382 int bnx2i_send_iscsi_tmf(struct bnx2i_conn *bnx2i_conn,
383 struct iscsi_task *mtask)
384 {
385 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
386 struct iscsi_tm *tmfabort_hdr;
387 struct scsi_cmnd *ref_sc;
388 struct iscsi_task *ctask;
389 struct bnx2i_tmf_request *tmfabort_wqe;
390 u32 dword;
391 u32 scsi_lun[2];
392
393 tmfabort_hdr = (struct iscsi_tm *)mtask->hdr;
394 tmfabort_wqe = (struct bnx2i_tmf_request *)
395 bnx2i_conn->ep->qp.sq_prod_qe;
396
397 tmfabort_wqe->op_code = tmfabort_hdr->opcode;
398 tmfabort_wqe->op_attr = tmfabort_hdr->flags;
399
400 tmfabort_wqe->itt = (mtask->itt | (ISCSI_TASK_TYPE_MPATH << 14));
401 tmfabort_wqe->reserved2 = 0;
402 tmfabort_wqe->cmd_sn = be32_to_cpu(tmfabort_hdr->cmdsn);
403
404 switch (tmfabort_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) {
405 case ISCSI_TM_FUNC_ABORT_TASK:
406 case ISCSI_TM_FUNC_TASK_REASSIGN:
407 ctask = iscsi_itt_to_task(conn, tmfabort_hdr->rtt);
408 if (!ctask || !ctask->sc)
409 /*
410 * the iscsi layer must have completed the cmd while
411 * was starting up.
412 *
413 * Note: In the case of a SCSI cmd timeout, the task's
414 * sc is still active; hence ctask->sc != 0
415 * In this case, the task must be aborted
416 */
417 return 0;
418
419 ref_sc = ctask->sc;
420 if (ref_sc->sc_data_direction == DMA_TO_DEVICE)
421 dword = (ISCSI_TASK_TYPE_WRITE <<
422 ISCSI_CMD_REQUEST_TYPE_SHIFT);
423 else
424 dword = (ISCSI_TASK_TYPE_READ <<
425 ISCSI_CMD_REQUEST_TYPE_SHIFT);
426 tmfabort_wqe->ref_itt = (dword |
427 (tmfabort_hdr->rtt & ISCSI_ITT_MASK));
428 break;
429 default:
430 tmfabort_wqe->ref_itt = RESERVED_ITT;
431 }
432 memcpy(scsi_lun, &tmfabort_hdr->lun, sizeof(struct scsi_lun));
433 tmfabort_wqe->lun[0] = be32_to_cpu(scsi_lun[0]);
434 tmfabort_wqe->lun[1] = be32_to_cpu(scsi_lun[1]);
435
436 tmfabort_wqe->ref_cmd_sn = be32_to_cpu(tmfabort_hdr->refcmdsn);
437
438 tmfabort_wqe->bd_list_addr_lo = (u32) bnx2i_conn->hba->mp_bd_dma;
439 tmfabort_wqe->bd_list_addr_hi = (u32)
440 ((u64) bnx2i_conn->hba->mp_bd_dma >> 32);
441 tmfabort_wqe->num_bds = 1;
442 tmfabort_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
443
444 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
445 return 0;
446 }
447
448 /**
449 * bnx2i_send_iscsi_text - post iSCSI text WQE to hardware
450 * @bnx2i_conn: iscsi connection
451 * @mtask: driver command structure which is requesting
452 * a WQE to sent to chip for further processing
453 *
454 * prepare and post an iSCSI Text request WQE to CNIC firmware
455 */
bnx2i_send_iscsi_text(struct bnx2i_conn * bnx2i_conn,struct iscsi_task * mtask)456 int bnx2i_send_iscsi_text(struct bnx2i_conn *bnx2i_conn,
457 struct iscsi_task *mtask)
458 {
459 struct bnx2i_text_request *text_wqe;
460 struct iscsi_text *text_hdr;
461 u32 dword;
462
463 text_hdr = (struct iscsi_text *)mtask->hdr;
464 text_wqe = (struct bnx2i_text_request *) bnx2i_conn->ep->qp.sq_prod_qe;
465
466 memset(text_wqe, 0, sizeof(struct bnx2i_text_request));
467
468 text_wqe->op_code = text_hdr->opcode;
469 text_wqe->op_attr = text_hdr->flags;
470 text_wqe->data_length = ntoh24(text_hdr->dlength);
471 text_wqe->itt = mtask->itt |
472 (ISCSI_TASK_TYPE_MPATH << ISCSI_TEXT_REQUEST_TYPE_SHIFT);
473 text_wqe->ttt = be32_to_cpu(text_hdr->ttt);
474
475 text_wqe->cmd_sn = be32_to_cpu(text_hdr->cmdsn);
476
477 text_wqe->resp_bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_bd_dma;
478 text_wqe->resp_bd_list_addr_hi =
479 (u32) ((u64) bnx2i_conn->gen_pdu.resp_bd_dma >> 32);
480
481 dword = ((1 << ISCSI_TEXT_REQUEST_NUM_RESP_BDS_SHIFT) |
482 (bnx2i_conn->gen_pdu.resp_buf_size <<
483 ISCSI_TEXT_REQUEST_RESP_BUFFER_LENGTH_SHIFT));
484 text_wqe->resp_buffer = dword;
485 text_wqe->bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.req_bd_dma;
486 text_wqe->bd_list_addr_hi =
487 (u32) ((u64) bnx2i_conn->gen_pdu.req_bd_dma >> 32);
488 text_wqe->num_bds = 1;
489 text_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
490
491 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
492 return 0;
493 }
494
495
496 /**
497 * bnx2i_send_iscsi_scsicmd - post iSCSI scsicmd request WQE to hardware
498 * @bnx2i_conn: iscsi connection
499 * @cmd: driver command structure which is requesting
500 * a WQE to sent to chip for further processing
501 *
502 * prepare and post an iSCSI SCSI-CMD request WQE to CNIC firmware
503 */
bnx2i_send_iscsi_scsicmd(struct bnx2i_conn * bnx2i_conn,struct bnx2i_cmd * cmd)504 int bnx2i_send_iscsi_scsicmd(struct bnx2i_conn *bnx2i_conn,
505 struct bnx2i_cmd *cmd)
506 {
507 struct bnx2i_cmd_request *scsi_cmd_wqe;
508
509 scsi_cmd_wqe = (struct bnx2i_cmd_request *)
510 bnx2i_conn->ep->qp.sq_prod_qe;
511 memcpy(scsi_cmd_wqe, &cmd->req, sizeof(struct bnx2i_cmd_request));
512 scsi_cmd_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
513
514 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
515 return 0;
516 }
517
518 /**
519 * bnx2i_send_iscsi_nopout - post iSCSI NOPOUT request WQE to hardware
520 * @bnx2i_conn: iscsi connection
521 * @task: transport layer's command structure pointer which is
522 * requesting a WQE to sent to chip for further processing
523 * @datap: payload buffer pointer
524 * @data_len: payload data length
525 * @unsol: indicated whether nopout pdu is unsolicited pdu or
526 * in response to target's NOPIN w/ TTT != FFFFFFFF
527 *
528 * prepare and post a nopout request WQE to CNIC firmware
529 */
bnx2i_send_iscsi_nopout(struct bnx2i_conn * bnx2i_conn,struct iscsi_task * task,char * datap,int data_len,int unsol)530 int bnx2i_send_iscsi_nopout(struct bnx2i_conn *bnx2i_conn,
531 struct iscsi_task *task,
532 char *datap, int data_len, int unsol)
533 {
534 struct bnx2i_endpoint *ep = bnx2i_conn->ep;
535 struct bnx2i_nop_out_request *nopout_wqe;
536 struct iscsi_nopout *nopout_hdr;
537
538 nopout_hdr = (struct iscsi_nopout *)task->hdr;
539 nopout_wqe = (struct bnx2i_nop_out_request *)ep->qp.sq_prod_qe;
540
541 memset(nopout_wqe, 0x00, sizeof(struct bnx2i_nop_out_request));
542
543 nopout_wqe->op_code = nopout_hdr->opcode;
544 nopout_wqe->op_attr = ISCSI_FLAG_CMD_FINAL;
545 memcpy(nopout_wqe->lun, &nopout_hdr->lun, 8);
546
547 /* 57710 requires LUN field to be swapped */
548 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
549 swap(nopout_wqe->lun[0], nopout_wqe->lun[1]);
550
551 nopout_wqe->itt = ((u16)task->itt |
552 (ISCSI_TASK_TYPE_MPATH <<
553 ISCSI_TMF_REQUEST_TYPE_SHIFT));
554 nopout_wqe->ttt = be32_to_cpu(nopout_hdr->ttt);
555 nopout_wqe->flags = 0;
556 if (!unsol)
557 nopout_wqe->flags = ISCSI_NOP_OUT_REQUEST_LOCAL_COMPLETION;
558 else if (nopout_hdr->itt == RESERVED_ITT)
559 nopout_wqe->flags = ISCSI_NOP_OUT_REQUEST_LOCAL_COMPLETION;
560
561 nopout_wqe->cmd_sn = be32_to_cpu(nopout_hdr->cmdsn);
562 nopout_wqe->data_length = data_len;
563 if (data_len) {
564 /* handle payload data, not required in first release */
565 printk(KERN_ALERT "NOPOUT: WARNING!! payload len != 0\n");
566 } else {
567 nopout_wqe->bd_list_addr_lo = (u32)
568 bnx2i_conn->hba->mp_bd_dma;
569 nopout_wqe->bd_list_addr_hi =
570 (u32) ((u64) bnx2i_conn->hba->mp_bd_dma >> 32);
571 nopout_wqe->num_bds = 1;
572 }
573 nopout_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
574
575 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
576 return 0;
577 }
578
579
580 /**
581 * bnx2i_send_iscsi_logout - post iSCSI logout request WQE to hardware
582 * @bnx2i_conn: iscsi connection
583 * @task: transport layer's command structure pointer which is
584 * requesting a WQE to sent to chip for further processing
585 *
586 * prepare and post logout request WQE to CNIC firmware
587 */
bnx2i_send_iscsi_logout(struct bnx2i_conn * bnx2i_conn,struct iscsi_task * task)588 int bnx2i_send_iscsi_logout(struct bnx2i_conn *bnx2i_conn,
589 struct iscsi_task *task)
590 {
591 struct bnx2i_logout_request *logout_wqe;
592 struct iscsi_logout *logout_hdr;
593
594 logout_hdr = (struct iscsi_logout *)task->hdr;
595
596 logout_wqe = (struct bnx2i_logout_request *)
597 bnx2i_conn->ep->qp.sq_prod_qe;
598 memset(logout_wqe, 0x00, sizeof(struct bnx2i_logout_request));
599
600 logout_wqe->op_code = logout_hdr->opcode;
601 logout_wqe->cmd_sn = be32_to_cpu(logout_hdr->cmdsn);
602 logout_wqe->op_attr =
603 logout_hdr->flags | ISCSI_LOGOUT_REQUEST_ALWAYS_ONE;
604 logout_wqe->itt = ((u16)task->itt |
605 (ISCSI_TASK_TYPE_MPATH <<
606 ISCSI_LOGOUT_REQUEST_TYPE_SHIFT));
607 logout_wqe->data_length = 0;
608 logout_wqe->cid = 0;
609
610 logout_wqe->bd_list_addr_lo = (u32) bnx2i_conn->hba->mp_bd_dma;
611 logout_wqe->bd_list_addr_hi = (u32)
612 ((u64) bnx2i_conn->hba->mp_bd_dma >> 32);
613 logout_wqe->num_bds = 1;
614 logout_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
615
616 bnx2i_conn->ep->state = EP_STATE_LOGOUT_SENT;
617
618 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
619 return 0;
620 }
621
622
623 /**
624 * bnx2i_update_iscsi_conn - post iSCSI logout request WQE to hardware
625 * @conn: iscsi connection which requires iscsi parameter update
626 *
627 * sends down iSCSI Conn Update request to move iSCSI conn to FFP
628 */
bnx2i_update_iscsi_conn(struct iscsi_conn * conn)629 void bnx2i_update_iscsi_conn(struct iscsi_conn *conn)
630 {
631 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
632 struct bnx2i_hba *hba = bnx2i_conn->hba;
633 struct kwqe *kwqe_arr[2];
634 struct iscsi_kwqe_conn_update *update_wqe;
635 struct iscsi_kwqe_conn_update conn_update_kwqe;
636
637 update_wqe = &conn_update_kwqe;
638
639 update_wqe->hdr.op_code = ISCSI_KWQE_OPCODE_UPDATE_CONN;
640 update_wqe->hdr.flags =
641 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
642
643 /* 5771x requires conn context id to be passed as is */
644 if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_conn->ep->hba->cnic_dev_type))
645 update_wqe->context_id = bnx2i_conn->ep->ep_cid;
646 else
647 update_wqe->context_id = (bnx2i_conn->ep->ep_cid >> 7);
648 update_wqe->conn_flags = 0;
649 if (conn->hdrdgst_en)
650 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_HEADER_DIGEST;
651 if (conn->datadgst_en)
652 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_DATA_DIGEST;
653 if (conn->session->initial_r2t_en)
654 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_INITIAL_R2T;
655 if (conn->session->imm_data_en)
656 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_IMMEDIATE_DATA;
657
658 update_wqe->max_send_pdu_length = conn->max_xmit_dlength;
659 update_wqe->max_recv_pdu_length = conn->max_recv_dlength;
660 update_wqe->first_burst_length = conn->session->first_burst;
661 update_wqe->max_burst_length = conn->session->max_burst;
662 update_wqe->exp_stat_sn = conn->exp_statsn;
663 update_wqe->max_outstanding_r2ts = conn->session->max_r2t;
664 update_wqe->session_error_recovery_level = conn->session->erl;
665 iscsi_conn_printk(KERN_ALERT, conn,
666 "bnx2i: conn update - MBL 0x%x FBL 0x%x"
667 "MRDSL_I 0x%x MRDSL_T 0x%x \n",
668 update_wqe->max_burst_length,
669 update_wqe->first_burst_length,
670 update_wqe->max_recv_pdu_length,
671 update_wqe->max_send_pdu_length);
672
673 kwqe_arr[0] = (struct kwqe *) update_wqe;
674 if (hba->cnic && hba->cnic->submit_kwqes)
675 hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 1);
676 }
677
678
679 /**
680 * bnx2i_ep_ofld_timer - post iSCSI logout request WQE to hardware
681 * @t: timer context used to fetch the endpoint (transport
682 * handle) structure pointer
683 *
684 * routine to handle connection offload/destroy request timeout
685 */
bnx2i_ep_ofld_timer(struct timer_list * t)686 void bnx2i_ep_ofld_timer(struct timer_list *t)
687 {
688 struct bnx2i_endpoint *ep = from_timer(ep, t, ofld_timer);
689
690 if (ep->state == EP_STATE_OFLD_START) {
691 printk(KERN_ALERT "ofld_timer: CONN_OFLD timeout\n");
692 ep->state = EP_STATE_OFLD_FAILED;
693 } else if (ep->state == EP_STATE_DISCONN_START) {
694 printk(KERN_ALERT "ofld_timer: CONN_DISCON timeout\n");
695 ep->state = EP_STATE_DISCONN_TIMEDOUT;
696 } else if (ep->state == EP_STATE_CLEANUP_START) {
697 printk(KERN_ALERT "ofld_timer: CONN_CLEANUP timeout\n");
698 ep->state = EP_STATE_CLEANUP_FAILED;
699 }
700
701 wake_up_interruptible(&ep->ofld_wait);
702 }
703
704
bnx2i_power_of2(u32 val)705 static int bnx2i_power_of2(u32 val)
706 {
707 u32 power = 0;
708 if (val & (val - 1))
709 return power;
710 val--;
711 while (val) {
712 val = val >> 1;
713 power++;
714 }
715 return power;
716 }
717
718
719 /**
720 * bnx2i_send_cmd_cleanup_req - send iscsi cmd context clean-up request
721 * @hba: adapter structure pointer
722 * @cmd: driver command structure which is requesting
723 * a WQE to sent to chip for further processing
724 *
725 * prepares and posts CONN_OFLD_REQ1/2 KWQE
726 */
bnx2i_send_cmd_cleanup_req(struct bnx2i_hba * hba,struct bnx2i_cmd * cmd)727 void bnx2i_send_cmd_cleanup_req(struct bnx2i_hba *hba, struct bnx2i_cmd *cmd)
728 {
729 struct bnx2i_cleanup_request *cmd_cleanup;
730
731 cmd_cleanup =
732 (struct bnx2i_cleanup_request *)cmd->conn->ep->qp.sq_prod_qe;
733 memset(cmd_cleanup, 0x00, sizeof(struct bnx2i_cleanup_request));
734
735 cmd_cleanup->op_code = ISCSI_OPCODE_CLEANUP_REQUEST;
736 cmd_cleanup->itt = cmd->req.itt;
737 cmd_cleanup->cq_index = 0; /* CQ# used for completion, 5771x only */
738
739 bnx2i_ring_dbell_update_sq_params(cmd->conn, 1);
740 }
741
742
743 /**
744 * bnx2i_send_conn_destroy - initiates iscsi connection teardown process
745 * @hba: adapter structure pointer
746 * @ep: endpoint (transport identifier) structure
747 *
748 * this routine prepares and posts CONN_OFLD_REQ1/2 KWQE to initiate
749 * iscsi connection context clean-up process
750 */
bnx2i_send_conn_destroy(struct bnx2i_hba * hba,struct bnx2i_endpoint * ep)751 int bnx2i_send_conn_destroy(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
752 {
753 struct kwqe *kwqe_arr[2];
754 struct iscsi_kwqe_conn_destroy conn_cleanup;
755 int rc = -EINVAL;
756
757 memset(&conn_cleanup, 0x00, sizeof(struct iscsi_kwqe_conn_destroy));
758
759 conn_cleanup.hdr.op_code = ISCSI_KWQE_OPCODE_DESTROY_CONN;
760 conn_cleanup.hdr.flags =
761 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
762 /* 5771x requires conn context id to be passed as is */
763 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
764 conn_cleanup.context_id = ep->ep_cid;
765 else
766 conn_cleanup.context_id = (ep->ep_cid >> 7);
767
768 conn_cleanup.reserved0 = (u16)ep->ep_iscsi_cid;
769
770 kwqe_arr[0] = (struct kwqe *) &conn_cleanup;
771 if (hba->cnic && hba->cnic->submit_kwqes)
772 rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 1);
773
774 return rc;
775 }
776
777
778 /**
779 * bnx2i_570x_send_conn_ofld_req - initiates iscsi conn context setup process
780 * @hba: adapter structure pointer
781 * @ep: endpoint (transport identifier) structure
782 *
783 * 5706/5708/5709 specific - prepares and posts CONN_OFLD_REQ1/2 KWQE
784 */
bnx2i_570x_send_conn_ofld_req(struct bnx2i_hba * hba,struct bnx2i_endpoint * ep)785 static int bnx2i_570x_send_conn_ofld_req(struct bnx2i_hba *hba,
786 struct bnx2i_endpoint *ep)
787 {
788 struct kwqe *kwqe_arr[2];
789 struct iscsi_kwqe_conn_offload1 ofld_req1;
790 struct iscsi_kwqe_conn_offload2 ofld_req2;
791 dma_addr_t dma_addr;
792 int num_kwqes = 2;
793 u32 *ptbl;
794 int rc = -EINVAL;
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;
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;
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;
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 *) ep->qp.sq_pgtbl_virt;
819
820 ofld_req2.sq_first_pte.hi = *ptbl++;
821 ofld_req2.sq_first_pte.lo = *ptbl;
822
823 ptbl = (u32 *) ep->qp.cq_pgtbl_virt;
824 ofld_req2.cq_first_pte.hi = *ptbl++;
825 ofld_req2.cq_first_pte.lo = *ptbl;
826
827 kwqe_arr[0] = (struct kwqe *) &ofld_req1;
828 kwqe_arr[1] = (struct kwqe *) &ofld_req2;
829 ofld_req2.num_additional_wqes = 0;
830
831 if (hba->cnic && hba->cnic->submit_kwqes)
832 rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, num_kwqes);
833
834 return rc;
835 }
836
837
838 /**
839 * bnx2i_5771x_send_conn_ofld_req - initiates iscsi connection context creation
840 * @hba: adapter structure pointer
841 * @ep: endpoint (transport identifier) structure
842 *
843 * 57710 specific - prepares and posts CONN_OFLD_REQ1/2 KWQE
844 */
bnx2i_5771x_send_conn_ofld_req(struct bnx2i_hba * hba,struct bnx2i_endpoint * ep)845 static int bnx2i_5771x_send_conn_ofld_req(struct bnx2i_hba *hba,
846 struct bnx2i_endpoint *ep)
847 {
848 struct kwqe *kwqe_arr[5];
849 struct iscsi_kwqe_conn_offload1 ofld_req1;
850 struct iscsi_kwqe_conn_offload2 ofld_req2;
851 struct iscsi_kwqe_conn_offload3 ofld_req3[1];
852 dma_addr_t dma_addr;
853 int num_kwqes = 2;
854 u32 *ptbl;
855 int rc = -EINVAL;
856
857 ofld_req1.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN1;
858 ofld_req1.hdr.flags =
859 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
860
861 ofld_req1.iscsi_conn_id = (u16) ep->ep_iscsi_cid;
862
863 dma_addr = ep->qp.sq_pgtbl_phys + ISCSI_SQ_DB_SIZE;
864 ofld_req1.sq_page_table_addr_lo = (u32) dma_addr;
865 ofld_req1.sq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
866
867 dma_addr = ep->qp.cq_pgtbl_phys + ISCSI_CQ_DB_SIZE;
868 ofld_req1.cq_page_table_addr_lo = (u32) dma_addr;
869 ofld_req1.cq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
870
871 ofld_req2.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN2;
872 ofld_req2.hdr.flags =
873 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
874
875 dma_addr = ep->qp.rq_pgtbl_phys + ISCSI_RQ_DB_SIZE;
876 ofld_req2.rq_page_table_addr_lo = (u32) dma_addr;
877 ofld_req2.rq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
878
879 ptbl = (u32 *)((u8 *)ep->qp.sq_pgtbl_virt + ISCSI_SQ_DB_SIZE);
880 ofld_req2.sq_first_pte.hi = *ptbl++;
881 ofld_req2.sq_first_pte.lo = *ptbl;
882
883 ptbl = (u32 *)((u8 *)ep->qp.cq_pgtbl_virt + ISCSI_CQ_DB_SIZE);
884 ofld_req2.cq_first_pte.hi = *ptbl++;
885 ofld_req2.cq_first_pte.lo = *ptbl;
886
887 kwqe_arr[0] = (struct kwqe *) &ofld_req1;
888 kwqe_arr[1] = (struct kwqe *) &ofld_req2;
889
890 ofld_req2.num_additional_wqes = 1;
891 memset(ofld_req3, 0x00, sizeof(ofld_req3[0]));
892 ptbl = (u32 *)((u8 *)ep->qp.rq_pgtbl_virt + ISCSI_RQ_DB_SIZE);
893 ofld_req3[0].qp_first_pte[0].hi = *ptbl++;
894 ofld_req3[0].qp_first_pte[0].lo = *ptbl;
895
896 kwqe_arr[2] = (struct kwqe *) ofld_req3;
897 /* need if we decide to go with multiple KCQE's per conn */
898 num_kwqes += 1;
899
900 if (hba->cnic && hba->cnic->submit_kwqes)
901 rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, num_kwqes);
902
903 return rc;
904 }
905
906 /**
907 * bnx2i_send_conn_ofld_req - initiates iscsi connection context setup process
908 *
909 * @hba: adapter structure pointer
910 * @ep: endpoint (transport identifier) structure
911 *
912 * this routine prepares and posts CONN_OFLD_REQ1/2 KWQE
913 */
bnx2i_send_conn_ofld_req(struct bnx2i_hba * hba,struct bnx2i_endpoint * ep)914 int bnx2i_send_conn_ofld_req(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
915 {
916 int rc;
917
918 if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type))
919 rc = bnx2i_5771x_send_conn_ofld_req(hba, ep);
920 else
921 rc = bnx2i_570x_send_conn_ofld_req(hba, ep);
922
923 return rc;
924 }
925
926
927 /**
928 * setup_qp_page_tables - iscsi QP page table setup function
929 * @ep: endpoint (transport identifier) structure
930 *
931 * Sets up page tables for SQ/RQ/CQ, 1G/sec (5706/5708/5709) devices requires
932 * 64-bit address in big endian format. Whereas 10G/sec (57710) requires
933 * PT in little endian format
934 */
setup_qp_page_tables(struct bnx2i_endpoint * ep)935 static void setup_qp_page_tables(struct bnx2i_endpoint *ep)
936 {
937 int num_pages;
938 u32 *ptbl;
939 dma_addr_t page;
940 int cnic_dev_10g;
941
942 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
943 cnic_dev_10g = 1;
944 else
945 cnic_dev_10g = 0;
946
947 /* SQ page table */
948 memset(ep->qp.sq_pgtbl_virt, 0, ep->qp.sq_pgtbl_size);
949 num_pages = ep->qp.sq_mem_size / CNIC_PAGE_SIZE;
950 page = ep->qp.sq_phys;
951
952 if (cnic_dev_10g)
953 ptbl = (u32 *)((u8 *)ep->qp.sq_pgtbl_virt + ISCSI_SQ_DB_SIZE);
954 else
955 ptbl = (u32 *) ep->qp.sq_pgtbl_virt;
956 while (num_pages--) {
957 if (cnic_dev_10g) {
958 /* PTE is written in little endian format for 57710 */
959 *ptbl = (u32) page;
960 ptbl++;
961 *ptbl = (u32) ((u64) page >> 32);
962 ptbl++;
963 page += CNIC_PAGE_SIZE;
964 } else {
965 /* PTE is written in big endian format for
966 * 5706/5708/5709 devices */
967 *ptbl = (u32) ((u64) page >> 32);
968 ptbl++;
969 *ptbl = (u32) page;
970 ptbl++;
971 page += CNIC_PAGE_SIZE;
972 }
973 }
974
975 /* RQ page table */
976 memset(ep->qp.rq_pgtbl_virt, 0, ep->qp.rq_pgtbl_size);
977 num_pages = ep->qp.rq_mem_size / CNIC_PAGE_SIZE;
978 page = ep->qp.rq_phys;
979
980 if (cnic_dev_10g)
981 ptbl = (u32 *)((u8 *)ep->qp.rq_pgtbl_virt + ISCSI_RQ_DB_SIZE);
982 else
983 ptbl = (u32 *) ep->qp.rq_pgtbl_virt;
984 while (num_pages--) {
985 if (cnic_dev_10g) {
986 /* PTE is written in little endian format for 57710 */
987 *ptbl = (u32) page;
988 ptbl++;
989 *ptbl = (u32) ((u64) page >> 32);
990 ptbl++;
991 page += CNIC_PAGE_SIZE;
992 } else {
993 /* PTE is written in big endian format for
994 * 5706/5708/5709 devices */
995 *ptbl = (u32) ((u64) page >> 32);
996 ptbl++;
997 *ptbl = (u32) page;
998 ptbl++;
999 page += CNIC_PAGE_SIZE;
1000 }
1001 }
1002
1003 /* CQ page table */
1004 memset(ep->qp.cq_pgtbl_virt, 0, ep->qp.cq_pgtbl_size);
1005 num_pages = ep->qp.cq_mem_size / CNIC_PAGE_SIZE;
1006 page = ep->qp.cq_phys;
1007
1008 if (cnic_dev_10g)
1009 ptbl = (u32 *)((u8 *)ep->qp.cq_pgtbl_virt + ISCSI_CQ_DB_SIZE);
1010 else
1011 ptbl = (u32 *) ep->qp.cq_pgtbl_virt;
1012 while (num_pages--) {
1013 if (cnic_dev_10g) {
1014 /* PTE is written in little endian format for 57710 */
1015 *ptbl = (u32) page;
1016 ptbl++;
1017 *ptbl = (u32) ((u64) page >> 32);
1018 ptbl++;
1019 page += CNIC_PAGE_SIZE;
1020 } else {
1021 /* PTE is written in big endian format for
1022 * 5706/5708/5709 devices */
1023 *ptbl = (u32) ((u64) page >> 32);
1024 ptbl++;
1025 *ptbl = (u32) page;
1026 ptbl++;
1027 page += CNIC_PAGE_SIZE;
1028 }
1029 }
1030 }
1031
1032
1033 /**
1034 * bnx2i_alloc_qp_resc - allocates required resources for QP.
1035 * @hba: adapter structure pointer
1036 * @ep: endpoint (transport identifier) structure
1037 *
1038 * Allocate QP (transport layer for iSCSI connection) resources, DMA'able
1039 * memory for SQ/RQ/CQ and page tables. EP structure elements such
1040 * as producer/consumer indexes/pointers, queue sizes and page table
1041 * contents are setup
1042 */
bnx2i_alloc_qp_resc(struct bnx2i_hba * hba,struct bnx2i_endpoint * ep)1043 int bnx2i_alloc_qp_resc(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
1044 {
1045 struct bnx2i_5771x_cq_db *cq_db;
1046
1047 ep->hba = hba;
1048 ep->conn = NULL;
1049 ep->ep_cid = ep->ep_iscsi_cid = ep->ep_pg_cid = 0;
1050
1051 /* Allocate page table memory for SQ which is page aligned */
1052 ep->qp.sq_mem_size = hba->max_sqes * BNX2I_SQ_WQE_SIZE;
1053 ep->qp.sq_mem_size =
1054 (ep->qp.sq_mem_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK;
1055 ep->qp.sq_pgtbl_size =
1056 (ep->qp.sq_mem_size / CNIC_PAGE_SIZE) * sizeof(void *);
1057 ep->qp.sq_pgtbl_size =
1058 (ep->qp.sq_pgtbl_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK;
1059
1060 ep->qp.sq_pgtbl_virt =
1061 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.sq_pgtbl_size,
1062 &ep->qp.sq_pgtbl_phys, GFP_KERNEL);
1063 if (!ep->qp.sq_pgtbl_virt) {
1064 printk(KERN_ALERT "bnx2i: unable to alloc SQ PT mem (%d)\n",
1065 ep->qp.sq_pgtbl_size);
1066 goto mem_alloc_err;
1067 }
1068
1069 /* Allocate memory area for actual SQ element */
1070 ep->qp.sq_virt =
1071 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.sq_mem_size,
1072 &ep->qp.sq_phys, GFP_KERNEL);
1073 if (!ep->qp.sq_virt) {
1074 printk(KERN_ALERT "bnx2i: unable to alloc SQ BD memory %d\n",
1075 ep->qp.sq_mem_size);
1076 goto mem_alloc_err;
1077 }
1078
1079 ep->qp.sq_first_qe = ep->qp.sq_virt;
1080 ep->qp.sq_prod_qe = ep->qp.sq_first_qe;
1081 ep->qp.sq_cons_qe = ep->qp.sq_first_qe;
1082 ep->qp.sq_last_qe = &ep->qp.sq_first_qe[hba->max_sqes - 1];
1083 ep->qp.sq_prod_idx = 0;
1084 ep->qp.sq_cons_idx = 0;
1085 ep->qp.sqe_left = hba->max_sqes;
1086
1087 /* Allocate page table memory for CQ which is page aligned */
1088 ep->qp.cq_mem_size = hba->max_cqes * BNX2I_CQE_SIZE;
1089 ep->qp.cq_mem_size =
1090 (ep->qp.cq_mem_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK;
1091 ep->qp.cq_pgtbl_size =
1092 (ep->qp.cq_mem_size / CNIC_PAGE_SIZE) * sizeof(void *);
1093 ep->qp.cq_pgtbl_size =
1094 (ep->qp.cq_pgtbl_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK;
1095
1096 ep->qp.cq_pgtbl_virt =
1097 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.cq_pgtbl_size,
1098 &ep->qp.cq_pgtbl_phys, GFP_KERNEL);
1099 if (!ep->qp.cq_pgtbl_virt) {
1100 printk(KERN_ALERT "bnx2i: unable to alloc CQ PT memory %d\n",
1101 ep->qp.cq_pgtbl_size);
1102 goto mem_alloc_err;
1103 }
1104
1105 /* Allocate memory area for actual CQ element */
1106 ep->qp.cq_virt =
1107 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.cq_mem_size,
1108 &ep->qp.cq_phys, GFP_KERNEL);
1109 if (!ep->qp.cq_virt) {
1110 printk(KERN_ALERT "bnx2i: unable to alloc CQ BD memory %d\n",
1111 ep->qp.cq_mem_size);
1112 goto mem_alloc_err;
1113 }
1114
1115 ep->qp.cq_first_qe = ep->qp.cq_virt;
1116 ep->qp.cq_prod_qe = ep->qp.cq_first_qe;
1117 ep->qp.cq_cons_qe = ep->qp.cq_first_qe;
1118 ep->qp.cq_last_qe = &ep->qp.cq_first_qe[hba->max_cqes - 1];
1119 ep->qp.cq_prod_idx = 0;
1120 ep->qp.cq_cons_idx = 0;
1121 ep->qp.cqe_left = hba->max_cqes;
1122 ep->qp.cqe_exp_seq_sn = ISCSI_INITIAL_SN;
1123 ep->qp.cqe_size = hba->max_cqes;
1124
1125 /* Invalidate all EQ CQE index, req only for 57710 */
1126 cq_db = (struct bnx2i_5771x_cq_db *) ep->qp.cq_pgtbl_virt;
1127 memset(cq_db->sqn, 0xFF, sizeof(cq_db->sqn[0]) * BNX2X_MAX_CQS);
1128
1129 /* Allocate page table memory for RQ which is page aligned */
1130 ep->qp.rq_mem_size = hba->max_rqes * BNX2I_RQ_WQE_SIZE;
1131 ep->qp.rq_mem_size =
1132 (ep->qp.rq_mem_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK;
1133 ep->qp.rq_pgtbl_size =
1134 (ep->qp.rq_mem_size / CNIC_PAGE_SIZE) * sizeof(void *);
1135 ep->qp.rq_pgtbl_size =
1136 (ep->qp.rq_pgtbl_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK;
1137
1138 ep->qp.rq_pgtbl_virt =
1139 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.rq_pgtbl_size,
1140 &ep->qp.rq_pgtbl_phys, GFP_KERNEL);
1141 if (!ep->qp.rq_pgtbl_virt) {
1142 printk(KERN_ALERT "bnx2i: unable to alloc RQ PT mem %d\n",
1143 ep->qp.rq_pgtbl_size);
1144 goto mem_alloc_err;
1145 }
1146
1147 /* Allocate memory area for actual RQ element */
1148 ep->qp.rq_virt =
1149 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.rq_mem_size,
1150 &ep->qp.rq_phys, GFP_KERNEL);
1151 if (!ep->qp.rq_virt) {
1152 printk(KERN_ALERT "bnx2i: unable to alloc RQ BD memory %d\n",
1153 ep->qp.rq_mem_size);
1154 goto mem_alloc_err;
1155 }
1156
1157 ep->qp.rq_first_qe = ep->qp.rq_virt;
1158 ep->qp.rq_prod_qe = ep->qp.rq_first_qe;
1159 ep->qp.rq_cons_qe = ep->qp.rq_first_qe;
1160 ep->qp.rq_last_qe = &ep->qp.rq_first_qe[hba->max_rqes - 1];
1161 ep->qp.rq_prod_idx = 0x8000;
1162 ep->qp.rq_cons_idx = 0;
1163 ep->qp.rqe_left = hba->max_rqes;
1164
1165 setup_qp_page_tables(ep);
1166
1167 return 0;
1168
1169 mem_alloc_err:
1170 bnx2i_free_qp_resc(hba, ep);
1171 return -ENOMEM;
1172 }
1173
1174
1175
1176 /**
1177 * bnx2i_free_qp_resc - free memory resources held by QP
1178 * @hba: adapter structure pointer
1179 * @ep: endpoint (transport identifier) structure
1180 *
1181 * Free QP resources - SQ/RQ/CQ memory and page tables.
1182 */
bnx2i_free_qp_resc(struct bnx2i_hba * hba,struct bnx2i_endpoint * ep)1183 void bnx2i_free_qp_resc(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
1184 {
1185 if (ep->qp.ctx_base) {
1186 iounmap(ep->qp.ctx_base);
1187 ep->qp.ctx_base = NULL;
1188 }
1189 /* Free SQ mem */
1190 if (ep->qp.sq_pgtbl_virt) {
1191 dma_free_coherent(&hba->pcidev->dev, ep->qp.sq_pgtbl_size,
1192 ep->qp.sq_pgtbl_virt, ep->qp.sq_pgtbl_phys);
1193 ep->qp.sq_pgtbl_virt = NULL;
1194 ep->qp.sq_pgtbl_phys = 0;
1195 }
1196 if (ep->qp.sq_virt) {
1197 dma_free_coherent(&hba->pcidev->dev, ep->qp.sq_mem_size,
1198 ep->qp.sq_virt, ep->qp.sq_phys);
1199 ep->qp.sq_virt = NULL;
1200 ep->qp.sq_phys = 0;
1201 }
1202
1203 /* Free RQ mem */
1204 if (ep->qp.rq_pgtbl_virt) {
1205 dma_free_coherent(&hba->pcidev->dev, ep->qp.rq_pgtbl_size,
1206 ep->qp.rq_pgtbl_virt, ep->qp.rq_pgtbl_phys);
1207 ep->qp.rq_pgtbl_virt = NULL;
1208 ep->qp.rq_pgtbl_phys = 0;
1209 }
1210 if (ep->qp.rq_virt) {
1211 dma_free_coherent(&hba->pcidev->dev, ep->qp.rq_mem_size,
1212 ep->qp.rq_virt, ep->qp.rq_phys);
1213 ep->qp.rq_virt = NULL;
1214 ep->qp.rq_phys = 0;
1215 }
1216
1217 /* Free CQ mem */
1218 if (ep->qp.cq_pgtbl_virt) {
1219 dma_free_coherent(&hba->pcidev->dev, ep->qp.cq_pgtbl_size,
1220 ep->qp.cq_pgtbl_virt, ep->qp.cq_pgtbl_phys);
1221 ep->qp.cq_pgtbl_virt = NULL;
1222 ep->qp.cq_pgtbl_phys = 0;
1223 }
1224 if (ep->qp.cq_virt) {
1225 dma_free_coherent(&hba->pcidev->dev, ep->qp.cq_mem_size,
1226 ep->qp.cq_virt, ep->qp.cq_phys);
1227 ep->qp.cq_virt = NULL;
1228 ep->qp.cq_phys = 0;
1229 }
1230 }
1231
1232
1233 /**
1234 * bnx2i_send_fw_iscsi_init_msg - initiates initial handshake with iscsi f/w
1235 * @hba: adapter structure pointer
1236 *
1237 * Send down iscsi_init KWQEs which initiates the initial handshake with the f/w
1238 * This results in iSCSi support validation and on-chip context manager
1239 * initialization. Firmware completes this handshake with a CQE carrying
1240 * the result of iscsi support validation. Parameter carried by
1241 * iscsi init request determines the number of offloaded connection and
1242 * tolerance level for iscsi protocol violation this hba/chip can support
1243 */
bnx2i_send_fw_iscsi_init_msg(struct bnx2i_hba * hba)1244 int bnx2i_send_fw_iscsi_init_msg(struct bnx2i_hba *hba)
1245 {
1246 struct kwqe *kwqe_arr[3];
1247 struct iscsi_kwqe_init1 iscsi_init;
1248 struct iscsi_kwqe_init2 iscsi_init2;
1249 int rc = 0;
1250 u64 mask64;
1251
1252 memset(&iscsi_init, 0x00, sizeof(struct iscsi_kwqe_init1));
1253 memset(&iscsi_init2, 0x00, sizeof(struct iscsi_kwqe_init2));
1254
1255 bnx2i_adjust_qp_size(hba);
1256
1257 iscsi_init.flags =
1258 (CNIC_PAGE_BITS - 8) << ISCSI_KWQE_INIT1_PAGE_SIZE_SHIFT;
1259 if (en_tcp_dack)
1260 iscsi_init.flags |= ISCSI_KWQE_INIT1_DELAYED_ACK_ENABLE;
1261 iscsi_init.reserved0 = 0;
1262 iscsi_init.num_cqs = 1;
1263 iscsi_init.hdr.op_code = ISCSI_KWQE_OPCODE_INIT1;
1264 iscsi_init.hdr.flags =
1265 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
1266
1267 iscsi_init.dummy_buffer_addr_lo = (u32) hba->dummy_buf_dma;
1268 iscsi_init.dummy_buffer_addr_hi =
1269 (u32) ((u64) hba->dummy_buf_dma >> 32);
1270
1271 hba->num_ccell = hba->max_sqes >> 1;
1272 hba->ctx_ccell_tasks =
1273 ((hba->num_ccell & 0xFFFF) | (hba->max_sqes << 16));
1274 iscsi_init.num_ccells_per_conn = hba->num_ccell;
1275 iscsi_init.num_tasks_per_conn = hba->max_sqes;
1276 iscsi_init.sq_wqes_per_page = CNIC_PAGE_SIZE / BNX2I_SQ_WQE_SIZE;
1277 iscsi_init.sq_num_wqes = hba->max_sqes;
1278 iscsi_init.cq_log_wqes_per_page =
1279 (u8) bnx2i_power_of2(CNIC_PAGE_SIZE / BNX2I_CQE_SIZE);
1280 iscsi_init.cq_num_wqes = hba->max_cqes;
1281 iscsi_init.cq_num_pages = (hba->max_cqes * BNX2I_CQE_SIZE +
1282 (CNIC_PAGE_SIZE - 1)) / CNIC_PAGE_SIZE;
1283 iscsi_init.sq_num_pages = (hba->max_sqes * BNX2I_SQ_WQE_SIZE +
1284 (CNIC_PAGE_SIZE - 1)) / CNIC_PAGE_SIZE;
1285 iscsi_init.rq_buffer_size = BNX2I_RQ_WQE_SIZE;
1286 iscsi_init.rq_num_wqes = hba->max_rqes;
1287
1288
1289 iscsi_init2.hdr.op_code = ISCSI_KWQE_OPCODE_INIT2;
1290 iscsi_init2.hdr.flags =
1291 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
1292 iscsi_init2.max_cq_sqn = hba->max_cqes * 2 + 1;
1293 mask64 = 0x0ULL;
1294 mask64 |= (
1295 /* CISCO MDS */
1296 (1UL <<
1297 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_NOT_RSRV) |
1298 /* HP MSA1510i */
1299 (1UL <<
1300 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_EXP_DATASN) |
1301 /* EMC */
1302 (1ULL << ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_LUN));
1303 if (error_mask1) {
1304 iscsi_init2.error_bit_map[0] = error_mask1;
1305 mask64 ^= (u32)(mask64);
1306 mask64 |= error_mask1;
1307 } else
1308 iscsi_init2.error_bit_map[0] = (u32) mask64;
1309
1310 if (error_mask2) {
1311 iscsi_init2.error_bit_map[1] = error_mask2;
1312 mask64 &= 0xffffffff;
1313 mask64 |= ((u64)error_mask2 << 32);
1314 } else
1315 iscsi_init2.error_bit_map[1] = (u32) (mask64 >> 32);
1316
1317 iscsi_error_mask = mask64;
1318
1319 kwqe_arr[0] = (struct kwqe *) &iscsi_init;
1320 kwqe_arr[1] = (struct kwqe *) &iscsi_init2;
1321
1322 if (hba->cnic && hba->cnic->submit_kwqes)
1323 rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 2);
1324 return rc;
1325 }
1326
1327
1328 /**
1329 * bnx2i_process_scsi_cmd_resp - this function handles scsi cmd completion.
1330 * @session: iscsi session
1331 * @bnx2i_conn: bnx2i connection
1332 * @cqe: pointer to newly DMA'ed CQE entry for processing
1333 *
1334 * process SCSI CMD Response CQE & complete the request to SCSI-ML
1335 */
bnx2i_process_scsi_cmd_resp(struct iscsi_session * session,struct bnx2i_conn * bnx2i_conn,struct cqe * cqe)1336 int bnx2i_process_scsi_cmd_resp(struct iscsi_session *session,
1337 struct bnx2i_conn *bnx2i_conn,
1338 struct cqe *cqe)
1339 {
1340 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1341 struct bnx2i_hba *hba = bnx2i_conn->hba;
1342 struct bnx2i_cmd_response *resp_cqe;
1343 struct bnx2i_cmd *bnx2i_cmd;
1344 struct iscsi_task *task;
1345 struct iscsi_scsi_rsp *hdr;
1346 u32 datalen = 0;
1347
1348 resp_cqe = (struct bnx2i_cmd_response *)cqe;
1349 spin_lock_bh(&session->back_lock);
1350 task = iscsi_itt_to_task(conn,
1351 resp_cqe->itt & ISCSI_CMD_RESPONSE_INDEX);
1352 if (!task)
1353 goto fail;
1354
1355 bnx2i_cmd = task->dd_data;
1356
1357 if (bnx2i_cmd->req.op_attr & ISCSI_CMD_REQUEST_READ) {
1358 conn->datain_pdus_cnt +=
1359 resp_cqe->task_stat.read_stat.num_data_ins;
1360 conn->rxdata_octets +=
1361 bnx2i_cmd->req.total_data_transfer_length;
1362 ADD_STATS_64(hba, rx_pdus,
1363 resp_cqe->task_stat.read_stat.num_data_ins);
1364 ADD_STATS_64(hba, rx_bytes,
1365 bnx2i_cmd->req.total_data_transfer_length);
1366 } else {
1367 conn->dataout_pdus_cnt +=
1368 resp_cqe->task_stat.write_stat.num_data_outs;
1369 conn->r2t_pdus_cnt +=
1370 resp_cqe->task_stat.write_stat.num_r2ts;
1371 conn->txdata_octets +=
1372 bnx2i_cmd->req.total_data_transfer_length;
1373 ADD_STATS_64(hba, tx_pdus,
1374 resp_cqe->task_stat.write_stat.num_data_outs);
1375 ADD_STATS_64(hba, tx_bytes,
1376 bnx2i_cmd->req.total_data_transfer_length);
1377 ADD_STATS_64(hba, rx_pdus,
1378 resp_cqe->task_stat.write_stat.num_r2ts);
1379 }
1380 bnx2i_iscsi_unmap_sg_list(bnx2i_cmd);
1381
1382 hdr = (struct iscsi_scsi_rsp *)task->hdr;
1383 resp_cqe = (struct bnx2i_cmd_response *)cqe;
1384 hdr->opcode = resp_cqe->op_code;
1385 hdr->max_cmdsn = cpu_to_be32(resp_cqe->max_cmd_sn);
1386 hdr->exp_cmdsn = cpu_to_be32(resp_cqe->exp_cmd_sn);
1387 hdr->response = resp_cqe->response;
1388 hdr->cmd_status = resp_cqe->status;
1389 hdr->flags = resp_cqe->response_flags;
1390 hdr->residual_count = cpu_to_be32(resp_cqe->residual_count);
1391
1392 if (resp_cqe->op_code == ISCSI_OP_SCSI_DATA_IN)
1393 goto done;
1394
1395 if (resp_cqe->status == SAM_STAT_CHECK_CONDITION) {
1396 datalen = resp_cqe->data_length;
1397 if (datalen < 2)
1398 goto done;
1399
1400 if (datalen > BNX2I_RQ_WQE_SIZE) {
1401 iscsi_conn_printk(KERN_ERR, conn,
1402 "sense data len %d > RQ sz\n",
1403 datalen);
1404 datalen = BNX2I_RQ_WQE_SIZE;
1405 } else if (datalen > ISCSI_DEF_MAX_RECV_SEG_LEN) {
1406 iscsi_conn_printk(KERN_ERR, conn,
1407 "sense data len %d > conn data\n",
1408 datalen);
1409 datalen = ISCSI_DEF_MAX_RECV_SEG_LEN;
1410 }
1411
1412 bnx2i_get_rq_buf(bnx2i_cmd->conn, conn->data, datalen);
1413 bnx2i_put_rq_buf(bnx2i_cmd->conn, 1);
1414 }
1415
1416 done:
1417 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr,
1418 conn->data, datalen);
1419 fail:
1420 spin_unlock_bh(&session->back_lock);
1421 return 0;
1422 }
1423
1424
1425 /**
1426 * bnx2i_process_login_resp - this function handles iscsi login response
1427 * @session: iscsi session pointer
1428 * @bnx2i_conn: iscsi connection pointer
1429 * @cqe: pointer to newly DMA'ed CQE entry for processing
1430 *
1431 * process Login Response CQE & complete it to open-iscsi user daemon
1432 */
bnx2i_process_login_resp(struct iscsi_session * session,struct bnx2i_conn * bnx2i_conn,struct cqe * cqe)1433 static int bnx2i_process_login_resp(struct iscsi_session *session,
1434 struct bnx2i_conn *bnx2i_conn,
1435 struct cqe *cqe)
1436 {
1437 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1438 struct iscsi_task *task;
1439 struct bnx2i_login_response *login;
1440 struct iscsi_login_rsp *resp_hdr;
1441 int pld_len;
1442 int pad_len;
1443
1444 login = (struct bnx2i_login_response *) cqe;
1445 spin_lock(&session->back_lock);
1446 task = iscsi_itt_to_task(conn,
1447 login->itt & ISCSI_LOGIN_RESPONSE_INDEX);
1448 if (!task)
1449 goto done;
1450
1451 resp_hdr = (struct iscsi_login_rsp *) &bnx2i_conn->gen_pdu.resp_hdr;
1452 memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1453 resp_hdr->opcode = login->op_code;
1454 resp_hdr->flags = login->response_flags;
1455 resp_hdr->max_version = login->version_max;
1456 resp_hdr->active_version = login->version_active;
1457 resp_hdr->hlength = 0;
1458
1459 hton24(resp_hdr->dlength, login->data_length);
1460 memcpy(resp_hdr->isid, &login->isid_lo, 6);
1461 resp_hdr->tsih = cpu_to_be16(login->tsih);
1462 resp_hdr->itt = task->hdr->itt;
1463 resp_hdr->statsn = cpu_to_be32(login->stat_sn);
1464 resp_hdr->exp_cmdsn = cpu_to_be32(login->exp_cmd_sn);
1465 resp_hdr->max_cmdsn = cpu_to_be32(login->max_cmd_sn);
1466 resp_hdr->status_class = login->status_class;
1467 resp_hdr->status_detail = login->status_detail;
1468 pld_len = login->data_length;
1469 bnx2i_conn->gen_pdu.resp_wr_ptr =
1470 bnx2i_conn->gen_pdu.resp_buf + pld_len;
1471
1472 pad_len = 0;
1473 if (pld_len & 0x3)
1474 pad_len = 4 - (pld_len % 4);
1475
1476 if (pad_len) {
1477 int i = 0;
1478 for (i = 0; i < pad_len; i++) {
1479 bnx2i_conn->gen_pdu.resp_wr_ptr[0] = 0;
1480 bnx2i_conn->gen_pdu.resp_wr_ptr++;
1481 }
1482 }
1483
1484 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr,
1485 bnx2i_conn->gen_pdu.resp_buf,
1486 bnx2i_conn->gen_pdu.resp_wr_ptr - bnx2i_conn->gen_pdu.resp_buf);
1487 done:
1488 spin_unlock(&session->back_lock);
1489 return 0;
1490 }
1491
1492
1493 /**
1494 * bnx2i_process_text_resp - this function handles iscsi text response
1495 * @session: iscsi session pointer
1496 * @bnx2i_conn: iscsi connection pointer
1497 * @cqe: pointer to newly DMA'ed CQE entry for processing
1498 *
1499 * process iSCSI Text Response CQE& complete it to open-iscsi user daemon
1500 */
bnx2i_process_text_resp(struct iscsi_session * session,struct bnx2i_conn * bnx2i_conn,struct cqe * cqe)1501 static int bnx2i_process_text_resp(struct iscsi_session *session,
1502 struct bnx2i_conn *bnx2i_conn,
1503 struct cqe *cqe)
1504 {
1505 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1506 struct iscsi_task *task;
1507 struct bnx2i_text_response *text;
1508 struct iscsi_text_rsp *resp_hdr;
1509 int pld_len;
1510 int pad_len;
1511
1512 text = (struct bnx2i_text_response *) cqe;
1513 spin_lock(&session->back_lock);
1514 task = iscsi_itt_to_task(conn, text->itt & ISCSI_LOGIN_RESPONSE_INDEX);
1515 if (!task)
1516 goto done;
1517
1518 resp_hdr = (struct iscsi_text_rsp *)&bnx2i_conn->gen_pdu.resp_hdr;
1519 memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1520 resp_hdr->opcode = text->op_code;
1521 resp_hdr->flags = text->response_flags;
1522 resp_hdr->hlength = 0;
1523
1524 hton24(resp_hdr->dlength, text->data_length);
1525 resp_hdr->itt = task->hdr->itt;
1526 resp_hdr->ttt = cpu_to_be32(text->ttt);
1527 resp_hdr->statsn = task->hdr->exp_statsn;
1528 resp_hdr->exp_cmdsn = cpu_to_be32(text->exp_cmd_sn);
1529 resp_hdr->max_cmdsn = cpu_to_be32(text->max_cmd_sn);
1530 pld_len = text->data_length;
1531 bnx2i_conn->gen_pdu.resp_wr_ptr = bnx2i_conn->gen_pdu.resp_buf +
1532 pld_len;
1533 pad_len = 0;
1534 if (pld_len & 0x3)
1535 pad_len = 4 - (pld_len % 4);
1536
1537 if (pad_len) {
1538 int i = 0;
1539 for (i = 0; i < pad_len; i++) {
1540 bnx2i_conn->gen_pdu.resp_wr_ptr[0] = 0;
1541 bnx2i_conn->gen_pdu.resp_wr_ptr++;
1542 }
1543 }
1544 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr,
1545 bnx2i_conn->gen_pdu.resp_buf,
1546 bnx2i_conn->gen_pdu.resp_wr_ptr -
1547 bnx2i_conn->gen_pdu.resp_buf);
1548 done:
1549 spin_unlock(&session->back_lock);
1550 return 0;
1551 }
1552
1553
1554 /**
1555 * bnx2i_process_tmf_resp - this function handles iscsi TMF response
1556 * @session: iscsi session pointer
1557 * @bnx2i_conn: iscsi connection pointer
1558 * @cqe: pointer to newly DMA'ed CQE entry for processing
1559 *
1560 * process iSCSI TMF Response CQE and wake up the driver eh thread.
1561 */
bnx2i_process_tmf_resp(struct iscsi_session * session,struct bnx2i_conn * bnx2i_conn,struct cqe * cqe)1562 static int bnx2i_process_tmf_resp(struct iscsi_session *session,
1563 struct bnx2i_conn *bnx2i_conn,
1564 struct cqe *cqe)
1565 {
1566 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1567 struct iscsi_task *task;
1568 struct bnx2i_tmf_response *tmf_cqe;
1569 struct iscsi_tm_rsp *resp_hdr;
1570
1571 tmf_cqe = (struct bnx2i_tmf_response *)cqe;
1572 spin_lock(&session->back_lock);
1573 task = iscsi_itt_to_task(conn,
1574 tmf_cqe->itt & ISCSI_TMF_RESPONSE_INDEX);
1575 if (!task)
1576 goto done;
1577
1578 resp_hdr = (struct iscsi_tm_rsp *) &bnx2i_conn->gen_pdu.resp_hdr;
1579 memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1580 resp_hdr->opcode = tmf_cqe->op_code;
1581 resp_hdr->max_cmdsn = cpu_to_be32(tmf_cqe->max_cmd_sn);
1582 resp_hdr->exp_cmdsn = cpu_to_be32(tmf_cqe->exp_cmd_sn);
1583 resp_hdr->itt = task->hdr->itt;
1584 resp_hdr->response = tmf_cqe->response;
1585
1586 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0);
1587 done:
1588 spin_unlock(&session->back_lock);
1589 return 0;
1590 }
1591
1592 /**
1593 * bnx2i_process_logout_resp - this function handles iscsi logout response
1594 * @session: iscsi session pointer
1595 * @bnx2i_conn: iscsi connection pointer
1596 * @cqe: pointer to newly DMA'ed CQE entry for processing
1597 *
1598 * process iSCSI Logout Response CQE & make function call to
1599 * notify the user daemon.
1600 */
bnx2i_process_logout_resp(struct iscsi_session * session,struct bnx2i_conn * bnx2i_conn,struct cqe * cqe)1601 static int bnx2i_process_logout_resp(struct iscsi_session *session,
1602 struct bnx2i_conn *bnx2i_conn,
1603 struct cqe *cqe)
1604 {
1605 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1606 struct iscsi_task *task;
1607 struct bnx2i_logout_response *logout;
1608 struct iscsi_logout_rsp *resp_hdr;
1609
1610 logout = (struct bnx2i_logout_response *) cqe;
1611 spin_lock(&session->back_lock);
1612 task = iscsi_itt_to_task(conn,
1613 logout->itt & ISCSI_LOGOUT_RESPONSE_INDEX);
1614 if (!task)
1615 goto done;
1616
1617 resp_hdr = (struct iscsi_logout_rsp *) &bnx2i_conn->gen_pdu.resp_hdr;
1618 memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1619 resp_hdr->opcode = logout->op_code;
1620 resp_hdr->flags = logout->response;
1621 resp_hdr->hlength = 0;
1622
1623 resp_hdr->itt = task->hdr->itt;
1624 resp_hdr->statsn = task->hdr->exp_statsn;
1625 resp_hdr->exp_cmdsn = cpu_to_be32(logout->exp_cmd_sn);
1626 resp_hdr->max_cmdsn = cpu_to_be32(logout->max_cmd_sn);
1627
1628 resp_hdr->t2wait = cpu_to_be32(logout->time_to_wait);
1629 resp_hdr->t2retain = cpu_to_be32(logout->time_to_retain);
1630
1631 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0);
1632
1633 bnx2i_conn->ep->state = EP_STATE_LOGOUT_RESP_RCVD;
1634 done:
1635 spin_unlock(&session->back_lock);
1636 return 0;
1637 }
1638
1639 /**
1640 * bnx2i_process_nopin_local_cmpl - this function handles iscsi nopin CQE
1641 * @session: iscsi session pointer
1642 * @bnx2i_conn: iscsi connection pointer
1643 * @cqe: pointer to newly DMA'ed CQE entry for processing
1644 *
1645 * process iSCSI NOPIN local completion CQE, frees IIT and command structures
1646 */
bnx2i_process_nopin_local_cmpl(struct iscsi_session * session,struct bnx2i_conn * bnx2i_conn,struct cqe * cqe)1647 static void bnx2i_process_nopin_local_cmpl(struct iscsi_session *session,
1648 struct bnx2i_conn *bnx2i_conn,
1649 struct cqe *cqe)
1650 {
1651 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1652 struct bnx2i_nop_in_msg *nop_in;
1653 struct iscsi_task *task;
1654
1655 nop_in = (struct bnx2i_nop_in_msg *)cqe;
1656 spin_lock(&session->back_lock);
1657 task = iscsi_itt_to_task(conn,
1658 nop_in->itt & ISCSI_NOP_IN_MSG_INDEX);
1659 if (task)
1660 __iscsi_put_task(task);
1661 spin_unlock(&session->back_lock);
1662 }
1663
1664 /**
1665 * bnx2i_unsol_pdu_adjust_rq - makes adjustments to RQ after unsol pdu is recvd
1666 * @bnx2i_conn: iscsi connection
1667 *
1668 * Firmware advances RQ producer index for every unsolicited PDU even if
1669 * payload data length is '0'. This function makes corresponding
1670 * adjustments on the driver side to match this f/w behavior
1671 */
bnx2i_unsol_pdu_adjust_rq(struct bnx2i_conn * bnx2i_conn)1672 static void bnx2i_unsol_pdu_adjust_rq(struct bnx2i_conn *bnx2i_conn)
1673 {
1674 char dummy_rq_data[2];
1675 bnx2i_get_rq_buf(bnx2i_conn, dummy_rq_data, 1);
1676 bnx2i_put_rq_buf(bnx2i_conn, 1);
1677 }
1678
1679
1680 /**
1681 * bnx2i_process_nopin_mesg - this function handles iscsi nopin CQE
1682 * @session: iscsi session pointer
1683 * @bnx2i_conn: iscsi connection pointer
1684 * @cqe: pointer to newly DMA'ed CQE entry for processing
1685 *
1686 * process iSCSI target's proactive iSCSI NOPIN request
1687 */
bnx2i_process_nopin_mesg(struct iscsi_session * session,struct bnx2i_conn * bnx2i_conn,struct cqe * cqe)1688 static int bnx2i_process_nopin_mesg(struct iscsi_session *session,
1689 struct bnx2i_conn *bnx2i_conn,
1690 struct cqe *cqe)
1691 {
1692 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1693 struct iscsi_task *task;
1694 struct bnx2i_nop_in_msg *nop_in;
1695 struct iscsi_nopin *hdr;
1696 int tgt_async_nop = 0;
1697
1698 nop_in = (struct bnx2i_nop_in_msg *)cqe;
1699
1700 spin_lock(&session->back_lock);
1701 hdr = (struct iscsi_nopin *)&bnx2i_conn->gen_pdu.resp_hdr;
1702 memset(hdr, 0, sizeof(struct iscsi_hdr));
1703 hdr->opcode = nop_in->op_code;
1704 hdr->max_cmdsn = cpu_to_be32(nop_in->max_cmd_sn);
1705 hdr->exp_cmdsn = cpu_to_be32(nop_in->exp_cmd_sn);
1706 hdr->ttt = cpu_to_be32(nop_in->ttt);
1707
1708 if (nop_in->itt == (u16) RESERVED_ITT) {
1709 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
1710 hdr->itt = RESERVED_ITT;
1711 tgt_async_nop = 1;
1712 goto done;
1713 }
1714
1715 /* this is a response to one of our nop-outs */
1716 task = iscsi_itt_to_task(conn,
1717 (itt_t) (nop_in->itt & ISCSI_NOP_IN_MSG_INDEX));
1718 if (task) {
1719 hdr->flags = ISCSI_FLAG_CMD_FINAL;
1720 hdr->itt = task->hdr->itt;
1721 hdr->ttt = cpu_to_be32(nop_in->ttt);
1722 memcpy(&hdr->lun, nop_in->lun, 8);
1723 }
1724 done:
1725 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, NULL, 0);
1726 spin_unlock(&session->back_lock);
1727
1728 return tgt_async_nop;
1729 }
1730
1731
1732 /**
1733 * bnx2i_process_async_mesg - this function handles iscsi async message
1734 * @session: iscsi session pointer
1735 * @bnx2i_conn: iscsi connection pointer
1736 * @cqe: pointer to newly DMA'ed CQE entry for processing
1737 *
1738 * process iSCSI ASYNC Message
1739 */
bnx2i_process_async_mesg(struct iscsi_session * session,struct bnx2i_conn * bnx2i_conn,struct cqe * cqe)1740 static void bnx2i_process_async_mesg(struct iscsi_session *session,
1741 struct bnx2i_conn *bnx2i_conn,
1742 struct cqe *cqe)
1743 {
1744 struct bnx2i_async_msg *async_cqe;
1745 struct iscsi_async *resp_hdr;
1746 u8 async_event;
1747
1748 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
1749
1750 async_cqe = (struct bnx2i_async_msg *)cqe;
1751 async_event = async_cqe->async_event;
1752
1753 if (async_event == ISCSI_ASYNC_MSG_SCSI_EVENT) {
1754 iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data,
1755 "async: scsi events not supported\n");
1756 return;
1757 }
1758
1759 spin_lock(&session->back_lock);
1760 resp_hdr = (struct iscsi_async *) &bnx2i_conn->gen_pdu.resp_hdr;
1761 memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1762 resp_hdr->opcode = async_cqe->op_code;
1763 resp_hdr->flags = 0x80;
1764
1765 memcpy(&resp_hdr->lun, async_cqe->lun, 8);
1766 resp_hdr->exp_cmdsn = cpu_to_be32(async_cqe->exp_cmd_sn);
1767 resp_hdr->max_cmdsn = cpu_to_be32(async_cqe->max_cmd_sn);
1768
1769 resp_hdr->async_event = async_cqe->async_event;
1770 resp_hdr->async_vcode = async_cqe->async_vcode;
1771
1772 resp_hdr->param1 = cpu_to_be16(async_cqe->param1);
1773 resp_hdr->param2 = cpu_to_be16(async_cqe->param2);
1774 resp_hdr->param3 = cpu_to_be16(async_cqe->param3);
1775
1776 __iscsi_complete_pdu(bnx2i_conn->cls_conn->dd_data,
1777 (struct iscsi_hdr *)resp_hdr, NULL, 0);
1778 spin_unlock(&session->back_lock);
1779 }
1780
1781
1782 /**
1783 * bnx2i_process_reject_mesg - process iscsi reject pdu
1784 * @session: iscsi session pointer
1785 * @bnx2i_conn: iscsi connection pointer
1786 * @cqe: pointer to newly DMA'ed CQE entry for processing
1787 *
1788 * process iSCSI REJECT message
1789 */
bnx2i_process_reject_mesg(struct iscsi_session * session,struct bnx2i_conn * bnx2i_conn,struct cqe * cqe)1790 static void bnx2i_process_reject_mesg(struct iscsi_session *session,
1791 struct bnx2i_conn *bnx2i_conn,
1792 struct cqe *cqe)
1793 {
1794 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1795 struct bnx2i_reject_msg *reject;
1796 struct iscsi_reject *hdr;
1797
1798 reject = (struct bnx2i_reject_msg *) cqe;
1799 if (reject->data_length) {
1800 bnx2i_get_rq_buf(bnx2i_conn, conn->data, reject->data_length);
1801 bnx2i_put_rq_buf(bnx2i_conn, 1);
1802 } else
1803 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
1804
1805 spin_lock(&session->back_lock);
1806 hdr = (struct iscsi_reject *) &bnx2i_conn->gen_pdu.resp_hdr;
1807 memset(hdr, 0, sizeof(struct iscsi_hdr));
1808 hdr->opcode = reject->op_code;
1809 hdr->reason = reject->reason;
1810 hton24(hdr->dlength, reject->data_length);
1811 hdr->max_cmdsn = cpu_to_be32(reject->max_cmd_sn);
1812 hdr->exp_cmdsn = cpu_to_be32(reject->exp_cmd_sn);
1813 hdr->ffffffff = cpu_to_be32(RESERVED_ITT);
1814 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, conn->data,
1815 reject->data_length);
1816 spin_unlock(&session->back_lock);
1817 }
1818
1819 /**
1820 * bnx2i_process_cmd_cleanup_resp - process scsi command clean-up completion
1821 * @session: iscsi session pointer
1822 * @bnx2i_conn: iscsi connection pointer
1823 * @cqe: pointer to newly DMA'ed CQE entry for processing
1824 *
1825 * process command cleanup response CQE during conn shutdown or error recovery
1826 */
bnx2i_process_cmd_cleanup_resp(struct iscsi_session * session,struct bnx2i_conn * bnx2i_conn,struct cqe * cqe)1827 static void bnx2i_process_cmd_cleanup_resp(struct iscsi_session *session,
1828 struct bnx2i_conn *bnx2i_conn,
1829 struct cqe *cqe)
1830 {
1831 struct bnx2i_cleanup_response *cmd_clean_rsp;
1832 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1833 struct iscsi_task *task;
1834
1835 cmd_clean_rsp = (struct bnx2i_cleanup_response *)cqe;
1836 spin_lock(&session->back_lock);
1837 task = iscsi_itt_to_task(conn,
1838 cmd_clean_rsp->itt & ISCSI_CLEANUP_RESPONSE_INDEX);
1839 if (!task)
1840 printk(KERN_ALERT "bnx2i: cmd clean ITT %x not active\n",
1841 cmd_clean_rsp->itt & ISCSI_CLEANUP_RESPONSE_INDEX);
1842 spin_unlock(&session->back_lock);
1843 complete(&bnx2i_conn->cmd_cleanup_cmpl);
1844 }
1845
1846
1847 /**
1848 * bnx2i_percpu_io_thread - thread per cpu for ios
1849 *
1850 * @arg: ptr to bnx2i_percpu_info structure
1851 */
bnx2i_percpu_io_thread(void * arg)1852 int bnx2i_percpu_io_thread(void *arg)
1853 {
1854 struct bnx2i_percpu_s *p = arg;
1855 struct bnx2i_work *work, *tmp;
1856 LIST_HEAD(work_list);
1857
1858 set_user_nice(current, MIN_NICE);
1859
1860 while (!kthread_should_stop()) {
1861 spin_lock_bh(&p->p_work_lock);
1862 while (!list_empty(&p->work_list)) {
1863 list_splice_init(&p->work_list, &work_list);
1864 spin_unlock_bh(&p->p_work_lock);
1865
1866 list_for_each_entry_safe(work, tmp, &work_list, list) {
1867 list_del_init(&work->list);
1868 /* work allocated in the bh, freed here */
1869 bnx2i_process_scsi_cmd_resp(work->session,
1870 work->bnx2i_conn,
1871 &work->cqe);
1872 atomic_dec(&work->bnx2i_conn->work_cnt);
1873 kfree(work);
1874 }
1875 spin_lock_bh(&p->p_work_lock);
1876 }
1877 set_current_state(TASK_INTERRUPTIBLE);
1878 spin_unlock_bh(&p->p_work_lock);
1879 schedule();
1880 }
1881 __set_current_state(TASK_RUNNING);
1882
1883 return 0;
1884 }
1885
1886
1887 /**
1888 * bnx2i_queue_scsi_cmd_resp - queue cmd completion to the percpu thread
1889 * @session: iscsi session
1890 * @bnx2i_conn: bnx2i connection
1891 * @cqe: pointer to newly DMA'ed CQE entry for processing
1892 *
1893 * this function is called by generic KCQ handler to queue all pending cmd
1894 * completion CQEs
1895 *
1896 * The implementation is to queue the cmd response based on the
1897 * last recorded command for the given connection. The
1898 * cpu_id gets recorded upon task_xmit. No out-of-order completion!
1899 */
bnx2i_queue_scsi_cmd_resp(struct iscsi_session * session,struct bnx2i_conn * bnx2i_conn,struct bnx2i_nop_in_msg * cqe)1900 static int bnx2i_queue_scsi_cmd_resp(struct iscsi_session *session,
1901 struct bnx2i_conn *bnx2i_conn,
1902 struct bnx2i_nop_in_msg *cqe)
1903 {
1904 struct bnx2i_work *bnx2i_work = NULL;
1905 struct bnx2i_percpu_s *p = NULL;
1906 struct iscsi_task *task;
1907 struct scsi_cmnd *sc;
1908 int rc = 0;
1909
1910 spin_lock(&session->back_lock);
1911 task = iscsi_itt_to_task(bnx2i_conn->cls_conn->dd_data,
1912 cqe->itt & ISCSI_CMD_RESPONSE_INDEX);
1913 if (!task || !task->sc) {
1914 spin_unlock(&session->back_lock);
1915 return -EINVAL;
1916 }
1917 sc = task->sc;
1918
1919 spin_unlock(&session->back_lock);
1920
1921 p = &per_cpu(bnx2i_percpu, blk_mq_rq_cpu(scsi_cmd_to_rq(sc)));
1922 spin_lock(&p->p_work_lock);
1923 if (unlikely(!p->iothread)) {
1924 rc = -EINVAL;
1925 goto err;
1926 }
1927 /* Alloc and copy to the cqe */
1928 bnx2i_work = kzalloc(sizeof(struct bnx2i_work), GFP_ATOMIC);
1929 if (bnx2i_work) {
1930 INIT_LIST_HEAD(&bnx2i_work->list);
1931 bnx2i_work->session = session;
1932 bnx2i_work->bnx2i_conn = bnx2i_conn;
1933 memcpy(&bnx2i_work->cqe, cqe, sizeof(struct cqe));
1934 list_add_tail(&bnx2i_work->list, &p->work_list);
1935 atomic_inc(&bnx2i_conn->work_cnt);
1936 wake_up_process(p->iothread);
1937 spin_unlock(&p->p_work_lock);
1938 goto done;
1939 } else
1940 rc = -ENOMEM;
1941 err:
1942 spin_unlock(&p->p_work_lock);
1943 bnx2i_process_scsi_cmd_resp(session, bnx2i_conn, (struct cqe *)cqe);
1944 done:
1945 return rc;
1946 }
1947
1948
1949 /**
1950 * bnx2i_process_new_cqes - process newly DMA'ed CQE's
1951 * @bnx2i_conn: bnx2i connection
1952 *
1953 * this function is called by generic KCQ handler to process all pending CQE's
1954 */
bnx2i_process_new_cqes(struct bnx2i_conn * bnx2i_conn)1955 static int bnx2i_process_new_cqes(struct bnx2i_conn *bnx2i_conn)
1956 {
1957 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1958 struct iscsi_session *session = conn->session;
1959 struct bnx2i_hba *hba = bnx2i_conn->hba;
1960 struct qp_info *qp;
1961 struct bnx2i_nop_in_msg *nopin;
1962 int tgt_async_msg;
1963 int cqe_cnt = 0;
1964
1965 if (bnx2i_conn->ep == NULL)
1966 return 0;
1967
1968 qp = &bnx2i_conn->ep->qp;
1969
1970 if (!qp->cq_virt) {
1971 printk(KERN_ALERT "bnx2i (%s): cq resr freed in bh execution!",
1972 hba->netdev->name);
1973 goto out;
1974 }
1975 while (1) {
1976 nopin = (struct bnx2i_nop_in_msg *) qp->cq_cons_qe;
1977 if (nopin->cq_req_sn != qp->cqe_exp_seq_sn)
1978 break;
1979
1980 if (unlikely(test_bit(ISCSI_CONN_FLAG_SUSPEND_RX, &conn->flags))) {
1981 if (nopin->op_code == ISCSI_OP_NOOP_IN &&
1982 nopin->itt == (u16) RESERVED_ITT) {
1983 printk(KERN_ALERT "bnx2i: Unsolicited "
1984 "NOP-In detected for suspended "
1985 "connection dev=%s!\n",
1986 hba->netdev->name);
1987 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
1988 goto cqe_out;
1989 }
1990 break;
1991 }
1992 tgt_async_msg = 0;
1993
1994 switch (nopin->op_code) {
1995 case ISCSI_OP_SCSI_CMD_RSP:
1996 case ISCSI_OP_SCSI_DATA_IN:
1997 /* Run the kthread engine only for data cmds
1998 All other cmds will be completed in this bh! */
1999 bnx2i_queue_scsi_cmd_resp(session, bnx2i_conn, nopin);
2000 goto done;
2001 case ISCSI_OP_LOGIN_RSP:
2002 bnx2i_process_login_resp(session, bnx2i_conn,
2003 qp->cq_cons_qe);
2004 break;
2005 case ISCSI_OP_SCSI_TMFUNC_RSP:
2006 bnx2i_process_tmf_resp(session, bnx2i_conn,
2007 qp->cq_cons_qe);
2008 break;
2009 case ISCSI_OP_TEXT_RSP:
2010 bnx2i_process_text_resp(session, bnx2i_conn,
2011 qp->cq_cons_qe);
2012 break;
2013 case ISCSI_OP_LOGOUT_RSP:
2014 bnx2i_process_logout_resp(session, bnx2i_conn,
2015 qp->cq_cons_qe);
2016 break;
2017 case ISCSI_OP_NOOP_IN:
2018 if (bnx2i_process_nopin_mesg(session, bnx2i_conn,
2019 qp->cq_cons_qe))
2020 tgt_async_msg = 1;
2021 break;
2022 case ISCSI_OPCODE_NOPOUT_LOCAL_COMPLETION:
2023 bnx2i_process_nopin_local_cmpl(session, bnx2i_conn,
2024 qp->cq_cons_qe);
2025 break;
2026 case ISCSI_OP_ASYNC_EVENT:
2027 bnx2i_process_async_mesg(session, bnx2i_conn,
2028 qp->cq_cons_qe);
2029 tgt_async_msg = 1;
2030 break;
2031 case ISCSI_OP_REJECT:
2032 bnx2i_process_reject_mesg(session, bnx2i_conn,
2033 qp->cq_cons_qe);
2034 break;
2035 case ISCSI_OPCODE_CLEANUP_RESPONSE:
2036 bnx2i_process_cmd_cleanup_resp(session, bnx2i_conn,
2037 qp->cq_cons_qe);
2038 break;
2039 default:
2040 printk(KERN_ALERT "bnx2i: unknown opcode 0x%x\n",
2041 nopin->op_code);
2042 }
2043
2044 ADD_STATS_64(hba, rx_pdus, 1);
2045 ADD_STATS_64(hba, rx_bytes, nopin->data_length);
2046 done:
2047 if (!tgt_async_msg) {
2048 if (!atomic_read(&bnx2i_conn->ep->num_active_cmds))
2049 printk(KERN_ALERT "bnx2i (%s): no active cmd! "
2050 "op 0x%x\n",
2051 hba->netdev->name,
2052 nopin->op_code);
2053 else
2054 atomic_dec(&bnx2i_conn->ep->num_active_cmds);
2055 }
2056 cqe_out:
2057 /* clear out in production version only, till beta keep opcode
2058 * field intact, will be helpful in debugging (context dump)
2059 * nopin->op_code = 0;
2060 */
2061 cqe_cnt++;
2062 qp->cqe_exp_seq_sn++;
2063 if (qp->cqe_exp_seq_sn == (qp->cqe_size * 2 + 1))
2064 qp->cqe_exp_seq_sn = ISCSI_INITIAL_SN;
2065
2066 if (qp->cq_cons_qe == qp->cq_last_qe) {
2067 qp->cq_cons_qe = qp->cq_first_qe;
2068 qp->cq_cons_idx = 0;
2069 } else {
2070 qp->cq_cons_qe++;
2071 qp->cq_cons_idx++;
2072 }
2073 }
2074 out:
2075 return cqe_cnt;
2076 }
2077
2078 /**
2079 * bnx2i_fastpath_notification - process global event queue (KCQ)
2080 * @hba: adapter structure pointer
2081 * @new_cqe_kcqe: pointer to newly DMA'ed KCQE entry
2082 *
2083 * Fast path event notification handler, KCQ entry carries context id
2084 * of the connection that has 1 or more pending CQ entries
2085 */
bnx2i_fastpath_notification(struct bnx2i_hba * hba,struct iscsi_kcqe * new_cqe_kcqe)2086 static void bnx2i_fastpath_notification(struct bnx2i_hba *hba,
2087 struct iscsi_kcqe *new_cqe_kcqe)
2088 {
2089 struct bnx2i_conn *bnx2i_conn;
2090 u32 iscsi_cid;
2091 int nxt_idx;
2092
2093 iscsi_cid = new_cqe_kcqe->iscsi_conn_id;
2094 bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
2095
2096 if (!bnx2i_conn) {
2097 printk(KERN_ALERT "cid #%x not valid\n", iscsi_cid);
2098 return;
2099 }
2100 if (!bnx2i_conn->ep) {
2101 printk(KERN_ALERT "cid #%x - ep not bound\n", iscsi_cid);
2102 return;
2103 }
2104
2105 bnx2i_process_new_cqes(bnx2i_conn);
2106 nxt_idx = bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep,
2107 CNIC_ARM_CQE_FP);
2108 if (nxt_idx && nxt_idx == bnx2i_process_new_cqes(bnx2i_conn))
2109 bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep, CNIC_ARM_CQE_FP);
2110 }
2111
2112
2113 /**
2114 * bnx2i_process_update_conn_cmpl - process iscsi conn update completion KCQE
2115 * @hba: adapter structure pointer
2116 * @update_kcqe: kcqe pointer
2117 *
2118 * CONN_UPDATE completion handler, this completes iSCSI connection FFP migration
2119 */
bnx2i_process_update_conn_cmpl(struct bnx2i_hba * hba,struct iscsi_kcqe * update_kcqe)2120 static void bnx2i_process_update_conn_cmpl(struct bnx2i_hba *hba,
2121 struct iscsi_kcqe *update_kcqe)
2122 {
2123 struct bnx2i_conn *conn;
2124 u32 iscsi_cid;
2125
2126 iscsi_cid = update_kcqe->iscsi_conn_id;
2127 conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
2128
2129 if (!conn) {
2130 printk(KERN_ALERT "conn_update: cid %x not valid\n", iscsi_cid);
2131 return;
2132 }
2133 if (!conn->ep) {
2134 printk(KERN_ALERT "cid %x does not have ep bound\n", iscsi_cid);
2135 return;
2136 }
2137
2138 if (update_kcqe->completion_status) {
2139 printk(KERN_ALERT "request failed cid %x\n", iscsi_cid);
2140 conn->ep->state = EP_STATE_ULP_UPDATE_FAILED;
2141 } else
2142 conn->ep->state = EP_STATE_ULP_UPDATE_COMPL;
2143
2144 wake_up_interruptible(&conn->ep->ofld_wait);
2145 }
2146
2147
2148 /**
2149 * bnx2i_recovery_que_add_conn - add connection to recovery queue
2150 * @hba: adapter structure pointer
2151 * @bnx2i_conn: iscsi connection
2152 *
2153 * Add connection to recovery queue and schedule adapter eh worker
2154 */
bnx2i_recovery_que_add_conn(struct bnx2i_hba * hba,struct bnx2i_conn * bnx2i_conn)2155 static void bnx2i_recovery_que_add_conn(struct bnx2i_hba *hba,
2156 struct bnx2i_conn *bnx2i_conn)
2157 {
2158 iscsi_conn_failure(bnx2i_conn->cls_conn->dd_data,
2159 ISCSI_ERR_CONN_FAILED);
2160 }
2161
2162
2163 /**
2164 * bnx2i_process_tcp_error - process error notification on a given connection
2165 *
2166 * @hba: adapter structure pointer
2167 * @tcp_err: tcp error kcqe pointer
2168 *
2169 * handles tcp level error notifications from FW.
2170 */
bnx2i_process_tcp_error(struct bnx2i_hba * hba,struct iscsi_kcqe * tcp_err)2171 static void bnx2i_process_tcp_error(struct bnx2i_hba *hba,
2172 struct iscsi_kcqe *tcp_err)
2173 {
2174 struct bnx2i_conn *bnx2i_conn;
2175 u32 iscsi_cid;
2176
2177 iscsi_cid = tcp_err->iscsi_conn_id;
2178 bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
2179
2180 if (!bnx2i_conn) {
2181 printk(KERN_ALERT "bnx2i - cid 0x%x not valid\n", iscsi_cid);
2182 return;
2183 }
2184
2185 printk(KERN_ALERT "bnx2i - cid 0x%x had TCP errors, error code 0x%x\n",
2186 iscsi_cid, tcp_err->completion_status);
2187 bnx2i_recovery_que_add_conn(bnx2i_conn->hba, bnx2i_conn);
2188 }
2189
2190
2191 /**
2192 * bnx2i_process_iscsi_error - process error notification on a given connection
2193 * @hba: adapter structure pointer
2194 * @iscsi_err: iscsi error kcqe pointer
2195 *
2196 * handles iscsi error notifications from the FW. Firmware based in initial
2197 * handshake classifies iscsi protocol / TCP rfc violation into either
2198 * warning or error indications. If indication is of "Error" type, driver
2199 * will initiate session recovery for that connection/session. For
2200 * "Warning" type indication, driver will put out a system log message
2201 * (there will be only one message for each type for the life of the
2202 * session, this is to avoid un-necessarily overloading the system)
2203 */
bnx2i_process_iscsi_error(struct bnx2i_hba * hba,struct iscsi_kcqe * iscsi_err)2204 static void bnx2i_process_iscsi_error(struct bnx2i_hba *hba,
2205 struct iscsi_kcqe *iscsi_err)
2206 {
2207 struct bnx2i_conn *bnx2i_conn;
2208 u32 iscsi_cid;
2209 const char *additional_notice = "";
2210 const char *message;
2211 int need_recovery;
2212 u64 err_mask64;
2213
2214 iscsi_cid = iscsi_err->iscsi_conn_id;
2215 bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
2216 if (!bnx2i_conn) {
2217 printk(KERN_ALERT "bnx2i - cid 0x%x not valid\n", iscsi_cid);
2218 return;
2219 }
2220
2221 err_mask64 = (0x1ULL << iscsi_err->completion_status);
2222
2223 if (err_mask64 & iscsi_error_mask) {
2224 need_recovery = 0;
2225 message = "iscsi_warning";
2226 } else {
2227 need_recovery = 1;
2228 message = "iscsi_error";
2229 }
2230
2231 switch (iscsi_err->completion_status) {
2232 case ISCSI_KCQE_COMPLETION_STATUS_HDR_DIG_ERR:
2233 additional_notice = "hdr digest err";
2234 break;
2235 case ISCSI_KCQE_COMPLETION_STATUS_DATA_DIG_ERR:
2236 additional_notice = "data digest err";
2237 break;
2238 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_OPCODE:
2239 additional_notice = "wrong opcode rcvd";
2240 break;
2241 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_AHS_LEN:
2242 additional_notice = "AHS len > 0 rcvd";
2243 break;
2244 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_ITT:
2245 additional_notice = "invalid ITT rcvd";
2246 break;
2247 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_STATSN:
2248 additional_notice = "wrong StatSN rcvd";
2249 break;
2250 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_EXP_DATASN:
2251 additional_notice = "wrong DataSN rcvd";
2252 break;
2253 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T:
2254 additional_notice = "pend R2T violation";
2255 break;
2256 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_0:
2257 additional_notice = "ERL0, UO";
2258 break;
2259 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_1:
2260 additional_notice = "ERL0, U1";
2261 break;
2262 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_2:
2263 additional_notice = "ERL0, U2";
2264 break;
2265 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_3:
2266 additional_notice = "ERL0, U3";
2267 break;
2268 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_4:
2269 additional_notice = "ERL0, U4";
2270 break;
2271 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_5:
2272 additional_notice = "ERL0, U5";
2273 break;
2274 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_6:
2275 additional_notice = "ERL0, U6";
2276 break;
2277 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REMAIN_RCV_LEN:
2278 additional_notice = "invalid resi len";
2279 break;
2280 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_MAX_RCV_PDU_LEN:
2281 additional_notice = "MRDSL violation";
2282 break;
2283 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_F_BIT_ZERO:
2284 additional_notice = "F-bit not set";
2285 break;
2286 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_NOT_RSRV:
2287 additional_notice = "invalid TTT";
2288 break;
2289 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DATASN:
2290 additional_notice = "invalid DataSN";
2291 break;
2292 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REMAIN_BURST_LEN:
2293 additional_notice = "burst len violation";
2294 break;
2295 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_BUFFER_OFF:
2296 additional_notice = "buf offset violation";
2297 break;
2298 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_LUN:
2299 additional_notice = "invalid LUN field";
2300 break;
2301 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_R2TSN:
2302 additional_notice = "invalid R2TSN field";
2303 break;
2304 #define BNX2I_ERR_DESIRED_DATA_TRNS_LEN_0 \
2305 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_0
2306 case BNX2I_ERR_DESIRED_DATA_TRNS_LEN_0:
2307 additional_notice = "invalid cmd len1";
2308 break;
2309 #define BNX2I_ERR_DESIRED_DATA_TRNS_LEN_1 \
2310 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_1
2311 case BNX2I_ERR_DESIRED_DATA_TRNS_LEN_1:
2312 additional_notice = "invalid cmd len2";
2313 break;
2314 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T_EXCEED:
2315 additional_notice = "pend r2t exceeds MaxOutstandingR2T value";
2316 break;
2317 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_IS_RSRV:
2318 additional_notice = "TTT is rsvd";
2319 break;
2320 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_MAX_BURST_LEN:
2321 additional_notice = "MBL violation";
2322 break;
2323 #define BNX2I_ERR_DATA_SEG_LEN_NOT_ZERO \
2324 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DATA_SEG_LEN_NOT_ZERO
2325 case BNX2I_ERR_DATA_SEG_LEN_NOT_ZERO:
2326 additional_notice = "data seg len != 0";
2327 break;
2328 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REJECT_PDU_LEN:
2329 additional_notice = "reject pdu len error";
2330 break;
2331 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_ASYNC_PDU_LEN:
2332 additional_notice = "async pdu len error";
2333 break;
2334 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_NOPIN_PDU_LEN:
2335 additional_notice = "nopin pdu len error";
2336 break;
2337 #define BNX2_ERR_PEND_R2T_IN_CLEANUP \
2338 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T_IN_CLEANUP
2339 case BNX2_ERR_PEND_R2T_IN_CLEANUP:
2340 additional_notice = "pend r2t in cleanup";
2341 break;
2342
2343 case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_IP_FRAGMENT:
2344 additional_notice = "IP fragments rcvd";
2345 break;
2346 case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_IP_OPTIONS:
2347 additional_notice = "IP options error";
2348 break;
2349 case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_URGENT_FLAG:
2350 additional_notice = "urgent flag error";
2351 break;
2352 default:
2353 printk(KERN_ALERT "iscsi_err - unknown err %x\n",
2354 iscsi_err->completion_status);
2355 }
2356
2357 if (need_recovery) {
2358 iscsi_conn_printk(KERN_ALERT,
2359 bnx2i_conn->cls_conn->dd_data,
2360 "bnx2i: %s - %s\n",
2361 message, additional_notice);
2362
2363 iscsi_conn_printk(KERN_ALERT,
2364 bnx2i_conn->cls_conn->dd_data,
2365 "conn_err - hostno %d conn %p, "
2366 "iscsi_cid %x cid %x\n",
2367 bnx2i_conn->hba->shost->host_no,
2368 bnx2i_conn, bnx2i_conn->ep->ep_iscsi_cid,
2369 bnx2i_conn->ep->ep_cid);
2370 bnx2i_recovery_que_add_conn(bnx2i_conn->hba, bnx2i_conn);
2371 } else
2372 if (!test_and_set_bit(iscsi_err->completion_status,
2373 (void *) &bnx2i_conn->violation_notified))
2374 iscsi_conn_printk(KERN_ALERT,
2375 bnx2i_conn->cls_conn->dd_data,
2376 "bnx2i: %s - %s\n",
2377 message, additional_notice);
2378 }
2379
2380
2381 /**
2382 * bnx2i_process_conn_destroy_cmpl - process iscsi conn destroy completion
2383 * @hba: adapter structure pointer
2384 * @conn_destroy: conn destroy kcqe pointer
2385 *
2386 * handles connection destroy completion request.
2387 */
bnx2i_process_conn_destroy_cmpl(struct bnx2i_hba * hba,struct iscsi_kcqe * conn_destroy)2388 static void bnx2i_process_conn_destroy_cmpl(struct bnx2i_hba *hba,
2389 struct iscsi_kcqe *conn_destroy)
2390 {
2391 struct bnx2i_endpoint *ep;
2392
2393 ep = bnx2i_find_ep_in_destroy_list(hba, conn_destroy->iscsi_conn_id);
2394 if (!ep) {
2395 printk(KERN_ALERT "bnx2i_conn_destroy_cmpl: no pending "
2396 "offload request, unexpected completion\n");
2397 return;
2398 }
2399
2400 if (hba != ep->hba) {
2401 printk(KERN_ALERT "conn destroy- error hba mismatch\n");
2402 return;
2403 }
2404
2405 if (conn_destroy->completion_status) {
2406 printk(KERN_ALERT "conn_destroy_cmpl: op failed\n");
2407 ep->state = EP_STATE_CLEANUP_FAILED;
2408 } else
2409 ep->state = EP_STATE_CLEANUP_CMPL;
2410 wake_up_interruptible(&ep->ofld_wait);
2411 }
2412
2413
2414 /**
2415 * bnx2i_process_ofld_cmpl - process initial iscsi conn offload completion
2416 * @hba: adapter structure pointer
2417 * @ofld_kcqe: conn offload kcqe pointer
2418 *
2419 * handles initial connection offload completion, ep_connect() thread is
2420 * woken-up to continue with LLP connect process
2421 */
bnx2i_process_ofld_cmpl(struct bnx2i_hba * hba,struct iscsi_kcqe * ofld_kcqe)2422 static void bnx2i_process_ofld_cmpl(struct bnx2i_hba *hba,
2423 struct iscsi_kcqe *ofld_kcqe)
2424 {
2425 u32 cid_addr;
2426 struct bnx2i_endpoint *ep;
2427
2428 ep = bnx2i_find_ep_in_ofld_list(hba, ofld_kcqe->iscsi_conn_id);
2429 if (!ep) {
2430 printk(KERN_ALERT "ofld_cmpl: no pend offload request\n");
2431 return;
2432 }
2433
2434 if (hba != ep->hba) {
2435 printk(KERN_ALERT "ofld_cmpl: error hba mismatch\n");
2436 return;
2437 }
2438
2439 if (ofld_kcqe->completion_status) {
2440 ep->state = EP_STATE_OFLD_FAILED;
2441 if (ofld_kcqe->completion_status ==
2442 ISCSI_KCQE_COMPLETION_STATUS_CTX_ALLOC_FAILURE)
2443 printk(KERN_ALERT "bnx2i (%s): ofld1 cmpl - unable "
2444 "to allocate iSCSI context resources\n",
2445 hba->netdev->name);
2446 else if (ofld_kcqe->completion_status ==
2447 ISCSI_KCQE_COMPLETION_STATUS_INVALID_OPCODE)
2448 printk(KERN_ALERT "bnx2i (%s): ofld1 cmpl - invalid "
2449 "opcode\n", hba->netdev->name);
2450 else if (ofld_kcqe->completion_status ==
2451 ISCSI_KCQE_COMPLETION_STATUS_CID_BUSY)
2452 /* error status code valid only for 5771x chipset */
2453 ep->state = EP_STATE_OFLD_FAILED_CID_BUSY;
2454 else
2455 printk(KERN_ALERT "bnx2i (%s): ofld1 cmpl - invalid "
2456 "error code %d\n", hba->netdev->name,
2457 ofld_kcqe->completion_status);
2458 } else {
2459 ep->state = EP_STATE_OFLD_COMPL;
2460 cid_addr = ofld_kcqe->iscsi_conn_context_id;
2461 ep->ep_cid = cid_addr;
2462 ep->qp.ctx_base = NULL;
2463 }
2464 wake_up_interruptible(&ep->ofld_wait);
2465 }
2466
2467 /**
2468 * bnx2i_indicate_kcqe - process iscsi conn update completion KCQE
2469 * @context: adapter structure pointer
2470 * @kcqe: kcqe pointer
2471 * @num_cqe: number of kcqes to process
2472 *
2473 * Generic KCQ event handler/dispatcher
2474 */
bnx2i_indicate_kcqe(void * context,struct kcqe * kcqe[],u32 num_cqe)2475 static void bnx2i_indicate_kcqe(void *context, struct kcqe *kcqe[],
2476 u32 num_cqe)
2477 {
2478 struct bnx2i_hba *hba = context;
2479 int i = 0;
2480 struct iscsi_kcqe *ikcqe = NULL;
2481
2482 while (i < num_cqe) {
2483 ikcqe = (struct iscsi_kcqe *) kcqe[i++];
2484
2485 if (ikcqe->op_code ==
2486 ISCSI_KCQE_OPCODE_CQ_EVENT_NOTIFICATION)
2487 bnx2i_fastpath_notification(hba, ikcqe);
2488 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_OFFLOAD_CONN)
2489 bnx2i_process_ofld_cmpl(hba, ikcqe);
2490 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_UPDATE_CONN)
2491 bnx2i_process_update_conn_cmpl(hba, ikcqe);
2492 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_INIT) {
2493 if (ikcqe->completion_status !=
2494 ISCSI_KCQE_COMPLETION_STATUS_SUCCESS)
2495 bnx2i_iscsi_license_error(hba, ikcqe->\
2496 completion_status);
2497 else {
2498 set_bit(ADAPTER_STATE_UP, &hba->adapter_state);
2499 bnx2i_get_link_state(hba);
2500 printk(KERN_INFO "bnx2i [%.2x:%.2x.%.2x]: "
2501 "ISCSI_INIT passed\n",
2502 (u8)hba->pcidev->bus->number,
2503 hba->pci_devno,
2504 (u8)hba->pci_func);
2505
2506
2507 }
2508 } else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_DESTROY_CONN)
2509 bnx2i_process_conn_destroy_cmpl(hba, ikcqe);
2510 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_ISCSI_ERROR)
2511 bnx2i_process_iscsi_error(hba, ikcqe);
2512 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_TCP_ERROR)
2513 bnx2i_process_tcp_error(hba, ikcqe);
2514 else
2515 printk(KERN_ALERT "bnx2i: unknown opcode 0x%x\n",
2516 ikcqe->op_code);
2517 }
2518 }
2519
2520
2521 /**
2522 * bnx2i_indicate_netevent - Generic netdev event handler
2523 * @context: adapter structure pointer
2524 * @event: event type
2525 * @vlan_id: vlans id - associated vlan id with this event
2526 *
2527 * Handles four netdev events, NETDEV_UP, NETDEV_DOWN,
2528 * NETDEV_GOING_DOWN and NETDEV_CHANGE
2529 */
bnx2i_indicate_netevent(void * context,unsigned long event,u16 vlan_id)2530 static void bnx2i_indicate_netevent(void *context, unsigned long event,
2531 u16 vlan_id)
2532 {
2533 struct bnx2i_hba *hba = context;
2534
2535 /* Ignore all netevent coming from vlans */
2536 if (vlan_id != 0)
2537 return;
2538
2539 switch (event) {
2540 case NETDEV_UP:
2541 if (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state))
2542 bnx2i_send_fw_iscsi_init_msg(hba);
2543 break;
2544 case NETDEV_DOWN:
2545 clear_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state);
2546 clear_bit(ADAPTER_STATE_UP, &hba->adapter_state);
2547 break;
2548 case NETDEV_GOING_DOWN:
2549 set_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state);
2550 iscsi_host_for_each_session(hba->shost,
2551 bnx2i_drop_session);
2552 break;
2553 case NETDEV_CHANGE:
2554 bnx2i_get_link_state(hba);
2555 break;
2556 default:
2557 ;
2558 }
2559 }
2560
2561
2562 /**
2563 * bnx2i_cm_connect_cmpl - process iscsi conn establishment completion
2564 * @cm_sk: cnic sock structure pointer
2565 *
2566 * function callback exported via bnx2i - cnic driver interface to
2567 * indicate completion of option-2 TCP connect request.
2568 */
bnx2i_cm_connect_cmpl(struct cnic_sock * cm_sk)2569 static void bnx2i_cm_connect_cmpl(struct cnic_sock *cm_sk)
2570 {
2571 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2572
2573 if (test_bit(ADAPTER_STATE_GOING_DOWN, &ep->hba->adapter_state))
2574 ep->state = EP_STATE_CONNECT_FAILED;
2575 else if (test_bit(SK_F_OFFLD_COMPLETE, &cm_sk->flags))
2576 ep->state = EP_STATE_CONNECT_COMPL;
2577 else
2578 ep->state = EP_STATE_CONNECT_FAILED;
2579
2580 wake_up_interruptible(&ep->ofld_wait);
2581 }
2582
2583
2584 /**
2585 * bnx2i_cm_close_cmpl - process tcp conn close completion
2586 * @cm_sk: cnic sock structure pointer
2587 *
2588 * function callback exported via bnx2i - cnic driver interface to
2589 * indicate completion of option-2 graceful TCP connect shutdown
2590 */
bnx2i_cm_close_cmpl(struct cnic_sock * cm_sk)2591 static void bnx2i_cm_close_cmpl(struct cnic_sock *cm_sk)
2592 {
2593 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2594
2595 ep->state = EP_STATE_DISCONN_COMPL;
2596 wake_up_interruptible(&ep->ofld_wait);
2597 }
2598
2599
2600 /**
2601 * bnx2i_cm_abort_cmpl - process abortive tcp conn teardown completion
2602 * @cm_sk: cnic sock structure pointer
2603 *
2604 * function callback exported via bnx2i - cnic driver interface to
2605 * indicate completion of option-2 abortive TCP connect termination
2606 */
bnx2i_cm_abort_cmpl(struct cnic_sock * cm_sk)2607 static void bnx2i_cm_abort_cmpl(struct cnic_sock *cm_sk)
2608 {
2609 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2610
2611 ep->state = EP_STATE_DISCONN_COMPL;
2612 wake_up_interruptible(&ep->ofld_wait);
2613 }
2614
2615
2616 /**
2617 * bnx2i_cm_remote_close - process received TCP FIN
2618 * @cm_sk: cnic sock structure pointer
2619 *
2620 * function callback exported via bnx2i - cnic driver interface to indicate
2621 * async TCP events such as FIN
2622 */
bnx2i_cm_remote_close(struct cnic_sock * cm_sk)2623 static void bnx2i_cm_remote_close(struct cnic_sock *cm_sk)
2624 {
2625 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2626
2627 ep->state = EP_STATE_TCP_FIN_RCVD;
2628 if (ep->conn)
2629 bnx2i_recovery_que_add_conn(ep->hba, ep->conn);
2630 }
2631
2632 /**
2633 * bnx2i_cm_remote_abort - process TCP RST and start conn cleanup
2634 * @cm_sk: cnic sock structure pointer
2635 *
2636 * function callback exported via bnx2i - cnic driver interface to
2637 * indicate async TCP events (RST) sent by the peer.
2638 */
bnx2i_cm_remote_abort(struct cnic_sock * cm_sk)2639 static void bnx2i_cm_remote_abort(struct cnic_sock *cm_sk)
2640 {
2641 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2642 u32 old_state = ep->state;
2643
2644 ep->state = EP_STATE_TCP_RST_RCVD;
2645 if (old_state == EP_STATE_DISCONN_START)
2646 wake_up_interruptible(&ep->ofld_wait);
2647 else
2648 if (ep->conn)
2649 bnx2i_recovery_que_add_conn(ep->hba, ep->conn);
2650 }
2651
2652
bnx2i_send_nl_mesg(void * context,u32 msg_type,char * buf,u16 buflen)2653 static int bnx2i_send_nl_mesg(void *context, u32 msg_type,
2654 char *buf, u16 buflen)
2655 {
2656 struct bnx2i_hba *hba = context;
2657 int rc;
2658
2659 if (!hba)
2660 return -ENODEV;
2661
2662 rc = iscsi_offload_mesg(hba->shost, &bnx2i_iscsi_transport,
2663 msg_type, buf, buflen);
2664 if (rc)
2665 printk(KERN_ALERT "bnx2i: private nl message send error\n");
2666
2667 return rc;
2668 }
2669
2670
2671 /*
2672 * bnx2i_cnic_cb - global template of bnx2i - cnic driver interface structure
2673 * carrying callback function pointers
2674 */
2675 struct cnic_ulp_ops bnx2i_cnic_cb = {
2676 .cnic_init = bnx2i_ulp_init,
2677 .cnic_exit = bnx2i_ulp_exit,
2678 .cnic_start = bnx2i_start,
2679 .cnic_stop = bnx2i_stop,
2680 .indicate_kcqes = bnx2i_indicate_kcqe,
2681 .indicate_netevent = bnx2i_indicate_netevent,
2682 .cm_connect_complete = bnx2i_cm_connect_cmpl,
2683 .cm_close_complete = bnx2i_cm_close_cmpl,
2684 .cm_abort_complete = bnx2i_cm_abort_cmpl,
2685 .cm_remote_close = bnx2i_cm_remote_close,
2686 .cm_remote_abort = bnx2i_cm_remote_abort,
2687 .iscsi_nl_send_msg = bnx2i_send_nl_mesg,
2688 .cnic_get_stats = bnx2i_get_stats,
2689 .owner = THIS_MODULE
2690 };
2691
2692
2693 /**
2694 * bnx2i_map_ep_dbell_regs - map connection doorbell registers
2695 * @ep: bnx2i endpoint
2696 *
2697 * maps connection's SQ and RQ doorbell registers, 5706/5708/5709 hosts these
2698 * register in BAR #0. Whereas in 57710 these register are accessed by
2699 * mapping BAR #1
2700 */
bnx2i_map_ep_dbell_regs(struct bnx2i_endpoint * ep)2701 int bnx2i_map_ep_dbell_regs(struct bnx2i_endpoint *ep)
2702 {
2703 u32 cid_num;
2704 u32 reg_off;
2705 u32 first_l4l5;
2706 u32 ctx_sz;
2707 u32 config2;
2708 resource_size_t reg_base;
2709
2710 cid_num = bnx2i_get_cid_num(ep);
2711
2712 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
2713 reg_base = pci_resource_start(ep->hba->pcidev,
2714 BNX2X_DOORBELL_PCI_BAR);
2715 reg_off = (1 << BNX2X_DB_SHIFT) * (cid_num & 0x1FFFF);
2716 ep->qp.ctx_base = ioremap(reg_base + reg_off, 4);
2717 if (!ep->qp.ctx_base)
2718 return -ENOMEM;
2719 goto arm_cq;
2720 }
2721
2722 if ((test_bit(BNX2I_NX2_DEV_5709, &ep->hba->cnic_dev_type)) &&
2723 (ep->hba->mail_queue_access == BNX2I_MQ_BIN_MODE)) {
2724 config2 = REG_RD(ep->hba, BNX2_MQ_CONFIG2);
2725 first_l4l5 = config2 & BNX2_MQ_CONFIG2_FIRST_L4L5;
2726 ctx_sz = (config2 & BNX2_MQ_CONFIG2_CONT_SZ) >> 3;
2727 if (ctx_sz)
2728 reg_off = CTX_OFFSET + MAX_CID_CNT * MB_KERNEL_CTX_SIZE
2729 + BNX2I_570X_PAGE_SIZE_DEFAULT *
2730 (((cid_num - first_l4l5) / ctx_sz) + 256);
2731 else
2732 reg_off = CTX_OFFSET + (MB_KERNEL_CTX_SIZE * cid_num);
2733 } else
2734 /* 5709 device in normal node and 5706/5708 devices */
2735 reg_off = CTX_OFFSET + (MB_KERNEL_CTX_SIZE * cid_num);
2736
2737 ep->qp.ctx_base = ioremap(ep->hba->reg_base + reg_off,
2738 MB_KERNEL_CTX_SIZE);
2739 if (!ep->qp.ctx_base)
2740 return -ENOMEM;
2741
2742 arm_cq:
2743 bnx2i_arm_cq_event_coalescing(ep, CNIC_ARM_CQE);
2744 return 0;
2745 }
2746