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scsi: bnx2i: add error handling for ioremap_nocache
[mirror_ubuntu-bionic-kernel.git] / drivers / scsi / bnx2i / bnx2i_hwi.c
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f39a7757 1/* bnx2i_hwi.c: QLogic NetXtreme II iSCSI driver.
cf4e6363 2 *
0b3bf387 3 * Copyright (c) 2006 - 2013 Broadcom Corporation
cf4e6363
MC		 4 * Copyright (c) 2007, 2008 Red Hat, Inc. All rights reserved.
5 * Copyright (c) 2007, 2008 Mike Christie
f39a7757 6 * Copyright (c) 2014, QLogic Corporation
cf4e6363
MC		 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)
f39a7757
VC		 13 * Previously Maintained by: Eddie Wai (eddie.wai@broadcom.com)
14 * Maintained by: QLogic-Storage-Upstream@qlogic.com
cf4e6363
MC		 15 */
16
5a0e3ad6 17#include <linux/gfp.h>
cf4e6363
MC		 18#include <scsi/scsi_tcq.h>
19#include <scsi/libiscsi.h>
20#include "bnx2i.h"
21
b5cf6b63
EW		 22DECLARE_PER_CPU(struct bnx2i_percpu_s, bnx2i_percpu);
23
cf4e6363
MC		 24/**
25 * bnx2i_get_cid_num - get cid from ep
26 * @ep: endpoint pointer
27 *
28 * Only applicable to 57710 family of devices
29 */
30static 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 */
48static 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 */
be1fefc2 66 num_elements_per_pg = CNIC_PAGE_SIZE / BNX2I_SQ_WQE_SIZE;
cf4e6363
MC		 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 */
be1fefc2 74 num_elements_per_pg = CNIC_PAGE_SIZE / BNX2I_CQE_SIZE;
cf4e6363
MC		 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 */
be1fefc2 82 num_elements_per_pg = CNIC_PAGE_SIZE / BNX2I_RQ_WQE_SIZE;
cf4e6363
MC		 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 */
97static 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 */
114static 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
3f79410c 131 * @ep: endpoint (transport identifier) structure
cf4e6363
MC		 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 */
b5cf6b63 138int bnx2i_arm_cq_event_coalescing(struct bnx2i_endpoint *ep, u8 action)
cf4e6363
MC		 139{
140 struct bnx2i_5771x_cq_db *cq_db;
141 u16 cq_index;
b5cf6b63 142 u16 next_index = 0;
8776193b 143 u32 num_active_cmds;
cf4e6363 144
8776193b 145 /* Coalesce CQ entries only on 10G devices */
cf4e6363 146 if (!test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
b5cf6b63 147 return 0;
cf4e6363 148
8776193b
AV		 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;
8776193b 154
9ae58e14
EW		 155 if (action != CNIC_ARM_CQE_FP)
156 if (cq_db->sqn[0] && cq_db->sqn[0] != 0xFFFF)
b5cf6b63 157 return 0;
9ae58e14
EW		 158
159 if (action == CNIC_ARM_CQE || action == CNIC_ARM_CQE_FP) {
b5cf6b63 160 num_active_cmds = atomic_read(&ep->num_active_cmds);
8776193b
AV		 161 if (num_active_cmds <= event_coal_min)
162 next_index = 1;
b5cf6b63
EW		 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 }
8776193b
AV		 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)
cf4e6363 174 cq_index = 1;
8776193b
AV		 175
176 cq_db->sqn[0] = cq_index;
cf4e6363 177 }
b5cf6b63 178 return next_index;
cf4e6363
MC		 179}
180
181
182/**
183 * bnx2i_get_rq_buf - copy RQ buffer contents to driver buffer
25985edc 184 * @conn: iscsi connection on which RQ event occurred
cf4e6363
MC		 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 */
193void 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
210static 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 * @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 */
231void 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 mmiowb();
257}
258
259
260/**
261 * bnx2i_ring_sq_dbell - Ring SQ doorbell to wake-up the processing engine
262 * @conn: iscsi connection to which new SQ entries belong
263 * @count: number of SQ WQEs to post
264 *
265 * SQ DB is updated in host memory and TX Doorbell is rung for 57710 family
266 * of devices. For 5706/5708/5709 new SQ WQE count is written into the
267 * doorbell register
268 */
269static void bnx2i_ring_sq_dbell(struct bnx2i_conn *bnx2i_conn, int count)
270{
271 struct bnx2i_5771x_sq_rq_db *sq_db;
272 struct bnx2i_endpoint *ep = bnx2i_conn->ep;
273
b5cf6b63 274 atomic_inc(&ep->num_active_cmds);
cf4e6363
MC		 275 wmb(); /* flush SQ WQE memory before the doorbell is rung */
276 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
277 sq_db = (struct bnx2i_5771x_sq_rq_db *) ep->qp.sq_pgtbl_virt;
278 sq_db->prod_idx = ep->qp.sq_prod_idx;
279 bnx2i_ring_577xx_doorbell(bnx2i_conn);
280 } else
281 writew(count, ep->qp.ctx_base + CNIC_SEND_DOORBELL);
282
283 mmiowb(); /* flush posted PCI writes */
284}
285
286
287/**
288 * bnx2i_ring_dbell_update_sq_params - update SQ driver parameters
289 * @conn: iscsi connection to which new SQ entries belong
290 * @count: number of SQ WQEs to post
291 *
292 * this routine will update SQ driver parameters and ring the doorbell
293 */
294static void bnx2i_ring_dbell_update_sq_params(struct bnx2i_conn *bnx2i_conn,
295 int count)
296{
297 int tmp_cnt;
298
299 if (count == 1) {
300 if (bnx2i_conn->ep->qp.sq_prod_qe ==
301 bnx2i_conn->ep->qp.sq_last_qe)
302 bnx2i_conn->ep->qp.sq_prod_qe =
303 bnx2i_conn->ep->qp.sq_first_qe;
304 else
305 bnx2i_conn->ep->qp.sq_prod_qe++;
306 } else {
307 if ((bnx2i_conn->ep->qp.sq_prod_qe + count) <=
308 bnx2i_conn->ep->qp.sq_last_qe)
309 bnx2i_conn->ep->qp.sq_prod_qe += count;
310 else {
311 tmp_cnt = bnx2i_conn->ep->qp.sq_last_qe -
312 bnx2i_conn->ep->qp.sq_prod_qe;
313 bnx2i_conn->ep->qp.sq_prod_qe =
314 &bnx2i_conn->ep->qp.sq_first_qe[count -
315 (tmp_cnt + 1)];
316 }
317 }
318 bnx2i_conn->ep->qp.sq_prod_idx += count;
319 /* Ring the doorbell */
320 bnx2i_ring_sq_dbell(bnx2i_conn, bnx2i_conn->ep->qp.sq_prod_idx);
321}
322
323
324/**
325 * bnx2i_send_iscsi_login - post iSCSI login request MP WQE to hardware
326 * @conn: iscsi connection
327 * @cmd: driver command structure which is requesting
328 * a WQE to sent to chip for further processing
329 *
330 * prepare and post an iSCSI Login request WQE to CNIC firmware
331 */
332int bnx2i_send_iscsi_login(struct bnx2i_conn *bnx2i_conn,
333 struct iscsi_task *task)
334{
cf4e6363 335 struct bnx2i_login_request *login_wqe;
12352183 336 struct iscsi_login_req *login_hdr;
cf4e6363
MC		 337 u32 dword;
338
12352183 339 login_hdr = (struct iscsi_login_req *)task->hdr;
cf4e6363
MC		 340 login_wqe = (struct bnx2i_login_request *)
341 bnx2i_conn->ep->qp.sq_prod_qe;
342
343 login_wqe->op_code = login_hdr->opcode;
344 login_wqe->op_attr = login_hdr->flags;
345 login_wqe->version_max = login_hdr->max_version;
346 login_wqe->version_min = login_hdr->min_version;
347 login_wqe->data_length = ntoh24(login_hdr->dlength);
348 login_wqe->isid_lo = *((u32 *) login_hdr->isid);
349 login_wqe->isid_hi = *((u16 *) login_hdr->isid + 2);
350 login_wqe->tsih = login_hdr->tsih;
351 login_wqe->itt = task->itt |
352 (ISCSI_TASK_TYPE_MPATH << ISCSI_LOGIN_REQUEST_TYPE_SHIFT);
353 login_wqe->cid = login_hdr->cid;
354
355 login_wqe->cmd_sn = be32_to_cpu(login_hdr->cmdsn);
356 login_wqe->exp_stat_sn = be32_to_cpu(login_hdr->exp_statsn);
2e15efc7 357 login_wqe->flags = ISCSI_LOGIN_REQUEST_UPDATE_EXP_STAT_SN;
cf4e6363
MC		 358
359 login_wqe->resp_bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_bd_dma;
360 login_wqe->resp_bd_list_addr_hi =
361 (u32) ((u64) bnx2i_conn->gen_pdu.resp_bd_dma >> 32);
362
363 dword = ((1 << ISCSI_LOGIN_REQUEST_NUM_RESP_BDS_SHIFT) |
364 (bnx2i_conn->gen_pdu.resp_buf_size <<
365 ISCSI_LOGIN_REQUEST_RESP_BUFFER_LENGTH_SHIFT));
366 login_wqe->resp_buffer = dword;
cf4e6363
MC		 367 login_wqe->bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.req_bd_dma;
368 login_wqe->bd_list_addr_hi =
369 (u32) ((u64) bnx2i_conn->gen_pdu.req_bd_dma >> 32);
370 login_wqe->num_bds = 1;
371 login_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
372
373 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
374 return 0;
375}
376
377/**
378 * bnx2i_send_iscsi_tmf - post iSCSI task management request MP WQE to hardware
379 * @conn: iscsi connection
380 * @mtask: driver command structure which is requesting
381 * a WQE to sent to chip for further processing
382 *
383 * prepare and post an iSCSI Login request WQE to CNIC firmware
384 */
385int bnx2i_send_iscsi_tmf(struct bnx2i_conn *bnx2i_conn,
386 struct iscsi_task *mtask)
387{
388 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
389 struct iscsi_tm *tmfabort_hdr;
390 struct scsi_cmnd *ref_sc;
391 struct iscsi_task *ctask;
cf4e6363
MC		 392 struct bnx2i_tmf_request *tmfabort_wqe;
393 u32 dword;
cf464fc5 394 u32 scsi_lun[2];
cf4e6363 395
cf4e6363
MC		 396 tmfabort_hdr = (struct iscsi_tm *)mtask->hdr;
397 tmfabort_wqe = (struct bnx2i_tmf_request *)
398 bnx2i_conn->ep->qp.sq_prod_qe;
399
400 tmfabort_wqe->op_code = tmfabort_hdr->opcode;
c47b4012 401 tmfabort_wqe->op_attr = tmfabort_hdr->flags;
cf4e6363
MC		 402
403 tmfabort_wqe->itt = (mtask->itt | (ISCSI_TASK_TYPE_MPATH << 14));
404 tmfabort_wqe->reserved2 = 0;
405 tmfabort_wqe->cmd_sn = be32_to_cpu(tmfabort_hdr->cmdsn);
406
c47b4012
EW		 407 switch (tmfabort_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) {
408 case ISCSI_TM_FUNC_ABORT_TASK:
409 case ISCSI_TM_FUNC_TASK_REASSIGN:
410 ctask = iscsi_itt_to_task(conn, tmfabort_hdr->rtt);
411 if (!ctask || !ctask->sc)
412 /*
413 * the iscsi layer must have completed the cmd while
414 * was starting up.
415 *
416 * Note: In the case of a SCSI cmd timeout, the task's
417 * sc is still active; hence ctask->sc != 0
418 * In this case, the task must be aborted
419 */
420 return 0;
421
422 ref_sc = ctask->sc;
423 if (ref_sc->sc_data_direction == DMA_TO_DEVICE)
424 dword = (ISCSI_TASK_TYPE_WRITE <<
425 ISCSI_CMD_REQUEST_TYPE_SHIFT);
426 else
427 dword = (ISCSI_TASK_TYPE_READ <<
428 ISCSI_CMD_REQUEST_TYPE_SHIFT);
429 tmfabort_wqe->ref_itt = (dword |
430 (tmfabort_hdr->rtt & ISCSI_ITT_MASK));
431 break;
432 default:
433 tmfabort_wqe->ref_itt = RESERVED_ITT;
434 }
516f43a2 435 memcpy(scsi_lun, &tmfabort_hdr->lun, sizeof(struct scsi_lun));
cf464fc5
EW		 436 tmfabort_wqe->lun[0] = be32_to_cpu(scsi_lun[0]);
437 tmfabort_wqe->lun[1] = be32_to_cpu(scsi_lun[1]);
438
cf4e6363
MC		 439 tmfabort_wqe->ref_cmd_sn = be32_to_cpu(tmfabort_hdr->refcmdsn);
440
441 tmfabort_wqe->bd_list_addr_lo = (u32) bnx2i_conn->hba->mp_bd_dma;
442 tmfabort_wqe->bd_list_addr_hi = (u32)
443 ((u64) bnx2i_conn->hba->mp_bd_dma >> 32);
444 tmfabort_wqe->num_bds = 1;
445 tmfabort_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
446
447 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
448 return 0;
449}
450
09813ba5
EW		 451/**
452 * bnx2i_send_iscsi_text - post iSCSI text WQE to hardware
453 * @conn: iscsi connection
454 * @mtask: driver command structure which is requesting
455 * a WQE to sent to chip for further processing
456 *
457 * prepare and post an iSCSI Text request WQE to CNIC firmware
458 */
459int bnx2i_send_iscsi_text(struct bnx2i_conn *bnx2i_conn,
460 struct iscsi_task *mtask)
461{
09813ba5
EW		 462 struct bnx2i_text_request *text_wqe;
463 struct iscsi_text *text_hdr;
464 u32 dword;
465
09813ba5
EW		 466 text_hdr = (struct iscsi_text *)mtask->hdr;
467 text_wqe = (struct bnx2i_text_request *) bnx2i_conn->ep->qp.sq_prod_qe;
468
469 memset(text_wqe, 0, sizeof(struct bnx2i_text_request));
470
471 text_wqe->op_code = text_hdr->opcode;
472 text_wqe->op_attr = text_hdr->flags;
473 text_wqe->data_length = ntoh24(text_hdr->dlength);
474 text_wqe->itt = mtask->itt |
475 (ISCSI_TASK_TYPE_MPATH << ISCSI_TEXT_REQUEST_TYPE_SHIFT);
476 text_wqe->ttt = be32_to_cpu(text_hdr->ttt);
477
478 text_wqe->cmd_sn = be32_to_cpu(text_hdr->cmdsn);
479
480 text_wqe->resp_bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_bd_dma;
481 text_wqe->resp_bd_list_addr_hi =
482 (u32) ((u64) bnx2i_conn->gen_pdu.resp_bd_dma >> 32);
483
484 dword = ((1 << ISCSI_TEXT_REQUEST_NUM_RESP_BDS_SHIFT) |
485 (bnx2i_conn->gen_pdu.resp_buf_size <<
486 ISCSI_TEXT_REQUEST_RESP_BUFFER_LENGTH_SHIFT));
487 text_wqe->resp_buffer = dword;
488 text_wqe->bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.req_bd_dma;
489 text_wqe->bd_list_addr_hi =
490 (u32) ((u64) bnx2i_conn->gen_pdu.req_bd_dma >> 32);
491 text_wqe->num_bds = 1;
492 text_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
493
494 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
495 return 0;
496}
497
498
cf4e6363
MC		 499/**
500 * bnx2i_send_iscsi_scsicmd - post iSCSI scsicmd request WQE to hardware
501 * @conn: iscsi connection
502 * @cmd: driver command structure which is requesting
503 * a WQE to sent to chip for further processing
504 *
505 * prepare and post an iSCSI SCSI-CMD request WQE to CNIC firmware
506 */
507int bnx2i_send_iscsi_scsicmd(struct bnx2i_conn *bnx2i_conn,
508 struct bnx2i_cmd *cmd)
509{
510 struct bnx2i_cmd_request *scsi_cmd_wqe;
511
512 scsi_cmd_wqe = (struct bnx2i_cmd_request *)
513 bnx2i_conn->ep->qp.sq_prod_qe;
514 memcpy(scsi_cmd_wqe, &cmd->req, sizeof(struct bnx2i_cmd_request));
515 scsi_cmd_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
516
517 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
518 return 0;
519}
520
521/**
522 * bnx2i_send_iscsi_nopout - post iSCSI NOPOUT request WQE to hardware
523 * @conn: iscsi connection
524 * @cmd: driver command structure which is requesting
525 * a WQE to sent to chip for further processing
cf4e6363
MC		 526 * @datap: payload buffer pointer
527 * @data_len: payload data length
528 * @unsol: indicated whether nopout pdu is unsolicited pdu or
529 * in response to target's NOPIN w/ TTT != FFFFFFFF
530 *
531 * prepare and post a nopout request WQE to CNIC firmware
532 */
533int bnx2i_send_iscsi_nopout(struct bnx2i_conn *bnx2i_conn,
39304072 534 struct iscsi_task *task,
cf4e6363
MC		 535 char *datap, int data_len, int unsol)
536{
537 struct bnx2i_endpoint *ep = bnx2i_conn->ep;
cf4e6363
MC		 538 struct bnx2i_nop_out_request *nopout_wqe;
539 struct iscsi_nopout *nopout_hdr;
540
cf4e6363
MC		 541 nopout_hdr = (struct iscsi_nopout *)task->hdr;
542 nopout_wqe = (struct bnx2i_nop_out_request *)ep->qp.sq_prod_qe;
70e14722
EW		 543
544 memset(nopout_wqe, 0x00, sizeof(struct bnx2i_nop_out_request));
545
cf4e6363
MC		 546 nopout_wqe->op_code = nopout_hdr->opcode;
547 nopout_wqe->op_attr = ISCSI_FLAG_CMD_FINAL;
516f43a2 548 memcpy(nopout_wqe->lun, &nopout_hdr->lun, 8);
cf4e6363
MC		 549
550 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
ee15bd2d 551 u32 tmp = nopout_wqe->lun[0];
cf4e6363 552 /* 57710 requires LUN field to be swapped */
ee15bd2d
EW		 553 nopout_wqe->lun[0] = nopout_wqe->lun[1];
554 nopout_wqe->lun[1] = tmp;
cf4e6363
MC		 555 }
556
557 nopout_wqe->itt = ((u16)task->itt |
558 (ISCSI_TASK_TYPE_MPATH <<
559 ISCSI_TMF_REQUEST_TYPE_SHIFT));
610602f3 560 nopout_wqe->ttt = be32_to_cpu(nopout_hdr->ttt);
cf4e6363
MC		 561 nopout_wqe->flags = 0;
562 if (!unsol)
563 nopout_wqe->flags = ISCSI_NOP_OUT_REQUEST_LOCAL_COMPLETION;
564 else if (nopout_hdr->itt == RESERVED_ITT)
565 nopout_wqe->flags = ISCSI_NOP_OUT_REQUEST_LOCAL_COMPLETION;
566
567 nopout_wqe->cmd_sn = be32_to_cpu(nopout_hdr->cmdsn);
568 nopout_wqe->data_length = data_len;
569 if (data_len) {
570 /* handle payload data, not required in first release */
571 printk(KERN_ALERT "NOPOUT: WARNING!! payload len != 0\n");
572 } else {
573 nopout_wqe->bd_list_addr_lo = (u32)
574 bnx2i_conn->hba->mp_bd_dma;
575 nopout_wqe->bd_list_addr_hi =
576 (u32) ((u64) bnx2i_conn->hba->mp_bd_dma >> 32);
577 nopout_wqe->num_bds = 1;
578 }
579 nopout_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
580
581 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
582 return 0;
583}
584
585
586/**
587 * bnx2i_send_iscsi_logout - post iSCSI logout request WQE to hardware
588 * @conn: iscsi connection
589 * @cmd: driver command structure which is requesting
590 * a WQE to sent to chip for further processing
591 *
592 * prepare and post logout request WQE to CNIC firmware
593 */
594int bnx2i_send_iscsi_logout(struct bnx2i_conn *bnx2i_conn,
595 struct iscsi_task *task)
596{
cf4e6363
MC		 597 struct bnx2i_logout_request *logout_wqe;
598 struct iscsi_logout *logout_hdr;
599
cf4e6363
MC		 600 logout_hdr = (struct iscsi_logout *)task->hdr;
601
602 logout_wqe = (struct bnx2i_logout_request *)
603 bnx2i_conn->ep->qp.sq_prod_qe;
604 memset(logout_wqe, 0x00, sizeof(struct bnx2i_logout_request));
605
606 logout_wqe->op_code = logout_hdr->opcode;
607 logout_wqe->cmd_sn = be32_to_cpu(logout_hdr->cmdsn);
608 logout_wqe->op_attr =
609 logout_hdr->flags | ISCSI_LOGOUT_REQUEST_ALWAYS_ONE;
610 logout_wqe->itt = ((u16)task->itt |
611 (ISCSI_TASK_TYPE_MPATH <<
612 ISCSI_LOGOUT_REQUEST_TYPE_SHIFT));
613 logout_wqe->data_length = 0;
614 logout_wqe->cid = 0;
615
616 logout_wqe->bd_list_addr_lo = (u32) bnx2i_conn->hba->mp_bd_dma;
617 logout_wqe->bd_list_addr_hi = (u32)
618 ((u64) bnx2i_conn->hba->mp_bd_dma >> 32);
619 logout_wqe->num_bds = 1;
620 logout_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
621
2eefb20d
EW		 622 bnx2i_conn->ep->state = EP_STATE_LOGOUT_SENT;
623
cf4e6363
MC		 624 bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
625 return 0;
626}
627
628
629/**
630 * bnx2i_update_iscsi_conn - post iSCSI logout request WQE to hardware
631 * @conn: iscsi connection which requires iscsi parameter update
632 *
633 * sends down iSCSI Conn Update request to move iSCSI conn to FFP
634 */
635void bnx2i_update_iscsi_conn(struct iscsi_conn *conn)
636{
637 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
638 struct bnx2i_hba *hba = bnx2i_conn->hba;
639 struct kwqe *kwqe_arr[2];
640 struct iscsi_kwqe_conn_update *update_wqe;
641 struct iscsi_kwqe_conn_update conn_update_kwqe;
642
643 update_wqe = &conn_update_kwqe;
644
645 update_wqe->hdr.op_code = ISCSI_KWQE_OPCODE_UPDATE_CONN;
646 update_wqe->hdr.flags =
647 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
648
649 /* 5771x requires conn context id to be passed as is */
650 if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_conn->ep->hba->cnic_dev_type))
651 update_wqe->context_id = bnx2i_conn->ep->ep_cid;
652 else
653 update_wqe->context_id = (bnx2i_conn->ep->ep_cid >> 7);
654 update_wqe->conn_flags = 0;
655 if (conn->hdrdgst_en)
656 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_HEADER_DIGEST;
657 if (conn->datadgst_en)
658 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_DATA_DIGEST;
659 if (conn->session->initial_r2t_en)
660 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_INITIAL_R2T;
661 if (conn->session->imm_data_en)
662 update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_IMMEDIATE_DATA;
663
664 update_wqe->max_send_pdu_length = conn->max_xmit_dlength;
665 update_wqe->max_recv_pdu_length = conn->max_recv_dlength;
666 update_wqe->first_burst_length = conn->session->first_burst;
667 update_wqe->max_burst_length = conn->session->max_burst;
668 update_wqe->exp_stat_sn = conn->exp_statsn;
669 update_wqe->max_outstanding_r2ts = conn->session->max_r2t;
670 update_wqe->session_error_recovery_level = conn->session->erl;
671 iscsi_conn_printk(KERN_ALERT, conn,
672 "bnx2i: conn update - MBL 0x%x FBL 0x%x"
673 "MRDSL_I 0x%x MRDSL_T 0x%x \n",
674 update_wqe->max_burst_length,
675 update_wqe->first_burst_length,
676 update_wqe->max_recv_pdu_length,
677 update_wqe->max_send_pdu_length);
678
679 kwqe_arr[0] = (struct kwqe *) update_wqe;
680 if (hba->cnic && hba->cnic->submit_kwqes)
681 hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 1);
682}
683
684
685/**
686 * bnx2i_ep_ofld_timer - post iSCSI logout request WQE to hardware
687 * @data: endpoint (transport handle) structure pointer
688 *
689 * routine to handle connection offload/destroy request timeout
690 */
abef7510 691void bnx2i_ep_ofld_timer(struct timer_list *t)
cf4e6363 692{
abef7510 693 struct bnx2i_endpoint *ep = from_timer(ep, t, ofld_timer);
cf4e6363
MC		 694
695 if (ep->state == EP_STATE_OFLD_START) {
696 printk(KERN_ALERT "ofld_timer: CONN_OFLD timeout\n");
697 ep->state = EP_STATE_OFLD_FAILED;
698 } else if (ep->state == EP_STATE_DISCONN_START) {
699 printk(KERN_ALERT "ofld_timer: CONN_DISCON timeout\n");
700 ep->state = EP_STATE_DISCONN_TIMEDOUT;
701 } else if (ep->state == EP_STATE_CLEANUP_START) {
702 printk(KERN_ALERT "ofld_timer: CONN_CLEANUP timeout\n");
703 ep->state = EP_STATE_CLEANUP_FAILED;
704 }
705
706 wake_up_interruptible(&ep->ofld_wait);
707}
708
709
710static int bnx2i_power_of2(u32 val)
711{
712 u32 power = 0;
713 if (val & (val - 1))
714 return power;
715 val--;
716 while (val) {
717 val = val >> 1;
718 power++;
719 }
720 return power;
721}
722
723
724/**
725 * bnx2i_send_cmd_cleanup_req - send iscsi cmd context clean-up request
726 * @hba: adapter structure pointer
727 * @cmd: driver command structure which is requesting
728 * a WQE to sent to chip for further processing
729 *
730 * prepares and posts CONN_OFLD_REQ1/2 KWQE
731 */
732void bnx2i_send_cmd_cleanup_req(struct bnx2i_hba *hba, struct bnx2i_cmd *cmd)
733{
734 struct bnx2i_cleanup_request *cmd_cleanup;
735
736 cmd_cleanup =
737 (struct bnx2i_cleanup_request *)cmd->conn->ep->qp.sq_prod_qe;
738 memset(cmd_cleanup, 0x00, sizeof(struct bnx2i_cleanup_request));
739
740 cmd_cleanup->op_code = ISCSI_OPCODE_CLEANUP_REQUEST;
741 cmd_cleanup->itt = cmd->req.itt;
742 cmd_cleanup->cq_index = 0; /* CQ# used for completion, 5771x only */
743
744 bnx2i_ring_dbell_update_sq_params(cmd->conn, 1);
745}
746
747
748/**
749 * bnx2i_send_conn_destroy - initiates iscsi connection teardown process
750 * @hba: adapter structure pointer
3f79410c 751 * @ep: endpoint (transport identifier) structure
cf4e6363
MC		 752 *
753 * this routine prepares and posts CONN_OFLD_REQ1/2 KWQE to initiate
754 * iscsi connection context clean-up process
755 */
bee34877 756int bnx2i_send_conn_destroy(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
cf4e6363
MC		 757{
758 struct kwqe *kwqe_arr[2];
759 struct iscsi_kwqe_conn_destroy conn_cleanup;
bee34877 760 int rc = -EINVAL;
cf4e6363
MC		 761
762 memset(&conn_cleanup, 0x00, sizeof(struct iscsi_kwqe_conn_destroy));
763
764 conn_cleanup.hdr.op_code = ISCSI_KWQE_OPCODE_DESTROY_CONN;
765 conn_cleanup.hdr.flags =
766 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
767 /* 5771x requires conn context id to be passed as is */
768 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
769 conn_cleanup.context_id = ep->ep_cid;
770 else
771 conn_cleanup.context_id = (ep->ep_cid >> 7);
772
773 conn_cleanup.reserved0 = (u16)ep->ep_iscsi_cid;
774
775 kwqe_arr[0] = (struct kwqe *) &conn_cleanup;
776 if (hba->cnic && hba->cnic->submit_kwqes)
bee34877
EW		 777 rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 1);
778
779 return rc;
cf4e6363
MC		 780}
781
782
783/**
784 * bnx2i_570x_send_conn_ofld_req - initiates iscsi conn context setup process
785 * @hba: adapter structure pointer
3f79410c 786 * @ep: endpoint (transport identifier) structure
cf4e6363
MC		 787 *
788 * 5706/5708/5709 specific - prepares and posts CONN_OFLD_REQ1/2 KWQE
789 */
bee34877
EW		 790static int bnx2i_570x_send_conn_ofld_req(struct bnx2i_hba *hba,
791 struct bnx2i_endpoint *ep)
cf4e6363
MC		 792{
793 struct kwqe *kwqe_arr[2];
794 struct iscsi_kwqe_conn_offload1 ofld_req1;
795 struct iscsi_kwqe_conn_offload2 ofld_req2;
796 dma_addr_t dma_addr;
797 int num_kwqes = 2;
798 u32 *ptbl;
bee34877 799 int rc = -EINVAL;
cf4e6363
MC		 800
801 ofld_req1.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN1;
802 ofld_req1.hdr.flags =
803 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
804
805 ofld_req1.iscsi_conn_id = (u16) ep->ep_iscsi_cid;
806
807 dma_addr = ep->qp.sq_pgtbl_phys;
808 ofld_req1.sq_page_table_addr_lo = (u32) dma_addr;
809 ofld_req1.sq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
810
811 dma_addr = ep->qp.cq_pgtbl_phys;
812 ofld_req1.cq_page_table_addr_lo = (u32) dma_addr;
813 ofld_req1.cq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
814
815 ofld_req2.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN2;
816 ofld_req2.hdr.flags =
817 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
818
819 dma_addr = ep->qp.rq_pgtbl_phys;
820 ofld_req2.rq_page_table_addr_lo = (u32) dma_addr;
821 ofld_req2.rq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
822
823 ptbl = (u32 *) ep->qp.sq_pgtbl_virt;
824
825 ofld_req2.sq_first_pte.hi = *ptbl++;
826 ofld_req2.sq_first_pte.lo = *ptbl;
827
828 ptbl = (u32 *) ep->qp.cq_pgtbl_virt;
829 ofld_req2.cq_first_pte.hi = *ptbl++;
830 ofld_req2.cq_first_pte.lo = *ptbl;
831
832 kwqe_arr[0] = (struct kwqe *) &ofld_req1;
833 kwqe_arr[1] = (struct kwqe *) &ofld_req2;
834 ofld_req2.num_additional_wqes = 0;
835
836 if (hba->cnic && hba->cnic->submit_kwqes)
bee34877
EW		 837 rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, num_kwqes);
838
839 return rc;
cf4e6363
MC		 840}
841
842
843/**
844 * bnx2i_5771x_send_conn_ofld_req - initiates iscsi connection context creation
845 * @hba: adapter structure pointer
3f79410c 846 * @ep: endpoint (transport identifier) structure
cf4e6363
MC		 847 *
848 * 57710 specific - prepares and posts CONN_OFLD_REQ1/2 KWQE
849 */
bee34877
EW		 850static int bnx2i_5771x_send_conn_ofld_req(struct bnx2i_hba *hba,
851 struct bnx2i_endpoint *ep)
cf4e6363
MC		 852{
853 struct kwqe *kwqe_arr[5];
854 struct iscsi_kwqe_conn_offload1 ofld_req1;
855 struct iscsi_kwqe_conn_offload2 ofld_req2;
856 struct iscsi_kwqe_conn_offload3 ofld_req3[1];
857 dma_addr_t dma_addr;
858 int num_kwqes = 2;
859 u32 *ptbl;
bee34877 860 int rc = -EINVAL;
cf4e6363
MC		 861
862 ofld_req1.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN1;
863 ofld_req1.hdr.flags =
864 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
865
866 ofld_req1.iscsi_conn_id = (u16) ep->ep_iscsi_cid;
867
868 dma_addr = ep->qp.sq_pgtbl_phys + ISCSI_SQ_DB_SIZE;
869 ofld_req1.sq_page_table_addr_lo = (u32) dma_addr;
870 ofld_req1.sq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
871
872 dma_addr = ep->qp.cq_pgtbl_phys + ISCSI_CQ_DB_SIZE;
873 ofld_req1.cq_page_table_addr_lo = (u32) dma_addr;
874 ofld_req1.cq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
875
876 ofld_req2.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN2;
877 ofld_req2.hdr.flags =
878 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
879
880 dma_addr = ep->qp.rq_pgtbl_phys + ISCSI_RQ_DB_SIZE;
881 ofld_req2.rq_page_table_addr_lo = (u32) dma_addr;
882 ofld_req2.rq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
883
884 ptbl = (u32 *)((u8 *)ep->qp.sq_pgtbl_virt + ISCSI_SQ_DB_SIZE);
885 ofld_req2.sq_first_pte.hi = *ptbl++;
886 ofld_req2.sq_first_pte.lo = *ptbl;
887
888 ptbl = (u32 *)((u8 *)ep->qp.cq_pgtbl_virt + ISCSI_CQ_DB_SIZE);
889 ofld_req2.cq_first_pte.hi = *ptbl++;
890 ofld_req2.cq_first_pte.lo = *ptbl;
891
892 kwqe_arr[0] = (struct kwqe *) &ofld_req1;
893 kwqe_arr[1] = (struct kwqe *) &ofld_req2;
894
895 ofld_req2.num_additional_wqes = 1;
896 memset(ofld_req3, 0x00, sizeof(ofld_req3[0]));
897 ptbl = (u32 *)((u8 *)ep->qp.rq_pgtbl_virt + ISCSI_RQ_DB_SIZE);
898 ofld_req3[0].qp_first_pte[0].hi = *ptbl++;
899 ofld_req3[0].qp_first_pte[0].lo = *ptbl;
900
901 kwqe_arr[2] = (struct kwqe *) ofld_req3;
902 /* need if we decide to go with multiple KCQE's per conn */
903 num_kwqes += 1;
904
905 if (hba->cnic && hba->cnic->submit_kwqes)
bee34877
EW		 906 rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, num_kwqes);
907
908 return rc;
cf4e6363
MC		 909}
910
911/**
912 * bnx2i_send_conn_ofld_req - initiates iscsi connection context setup process
913 *
914 * @hba: adapter structure pointer
3f79410c 915 * @ep: endpoint (transport identifier) structure
cf4e6363
MC		 916 *
917 * this routine prepares and posts CONN_OFLD_REQ1/2 KWQE
918 */
bee34877 919int bnx2i_send_conn_ofld_req(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
cf4e6363 920{
bee34877
EW		 921 int rc;
922
cf4e6363 923 if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type))
bee34877 924 rc = bnx2i_5771x_send_conn_ofld_req(hba, ep);
cf4e6363 925 else
bee34877
EW		 926 rc = bnx2i_570x_send_conn_ofld_req(hba, ep);
927
928 return rc;
cf4e6363
MC		 929}
930
931
932/**
933 * setup_qp_page_tables - iscsi QP page table setup function
3f79410c 934 * @ep: endpoint (transport identifier) structure
cf4e6363
MC		 935 *
936 * Sets up page tables for SQ/RQ/CQ, 1G/sec (5706/5708/5709) devices requires
937 * 64-bit address in big endian format. Whereas 10G/sec (57710) requires
938 * PT in little endian format
939 */
940static void setup_qp_page_tables(struct bnx2i_endpoint *ep)
941{
942 int num_pages;
943 u32 *ptbl;
944 dma_addr_t page;
945 int cnic_dev_10g;
946
947 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
948 cnic_dev_10g = 1;
949 else
950 cnic_dev_10g = 0;
951
952 /* SQ page table */
953 memset(ep->qp.sq_pgtbl_virt, 0, ep->qp.sq_pgtbl_size);
be1fefc2 954 num_pages = ep->qp.sq_mem_size / CNIC_PAGE_SIZE;
cf4e6363
MC		 955 page = ep->qp.sq_phys;
956
957 if (cnic_dev_10g)
958 ptbl = (u32 *)((u8 *)ep->qp.sq_pgtbl_virt + ISCSI_SQ_DB_SIZE);
959 else
960 ptbl = (u32 *) ep->qp.sq_pgtbl_virt;
961 while (num_pages--) {
962 if (cnic_dev_10g) {
963 /* PTE is written in little endian format for 57710 */
964 *ptbl = (u32) page;
965 ptbl++;
966 *ptbl = (u32) ((u64) page >> 32);
967 ptbl++;
be1fefc2 968 page += CNIC_PAGE_SIZE;
cf4e6363
MC		 969 } else {
970 /* PTE is written in big endian format for
971 * 5706/5708/5709 devices */
972 *ptbl = (u32) ((u64) page >> 32);
973 ptbl++;
974 *ptbl = (u32) page;
975 ptbl++;
be1fefc2 976 page += CNIC_PAGE_SIZE;
cf4e6363
MC		 977 }
978 }
979
980 /* RQ page table */
981 memset(ep->qp.rq_pgtbl_virt, 0, ep->qp.rq_pgtbl_size);
be1fefc2 982 num_pages = ep->qp.rq_mem_size / CNIC_PAGE_SIZE;
cf4e6363
MC		 983 page = ep->qp.rq_phys;
984
985 if (cnic_dev_10g)
986 ptbl = (u32 *)((u8 *)ep->qp.rq_pgtbl_virt + ISCSI_RQ_DB_SIZE);
987 else
988 ptbl = (u32 *) ep->qp.rq_pgtbl_virt;
989 while (num_pages--) {
990 if (cnic_dev_10g) {
991 /* PTE is written in little endian format for 57710 */
992 *ptbl = (u32) page;
993 ptbl++;
994 *ptbl = (u32) ((u64) page >> 32);
995 ptbl++;
be1fefc2 996 page += CNIC_PAGE_SIZE;
cf4e6363
MC		 997 } else {
998 /* PTE is written in big endian format for
999 * 5706/5708/5709 devices */
1000 *ptbl = (u32) ((u64) page >> 32);
1001 ptbl++;
1002 *ptbl = (u32) page;
1003 ptbl++;
be1fefc2 1004 page += CNIC_PAGE_SIZE;
cf4e6363
MC		 1005 }
1006 }
1007
1008 /* CQ page table */
1009 memset(ep->qp.cq_pgtbl_virt, 0, ep->qp.cq_pgtbl_size);
be1fefc2 1010 num_pages = ep->qp.cq_mem_size / CNIC_PAGE_SIZE;
cf4e6363
MC		 1011 page = ep->qp.cq_phys;
1012
1013 if (cnic_dev_10g)
1014 ptbl = (u32 *)((u8 *)ep->qp.cq_pgtbl_virt + ISCSI_CQ_DB_SIZE);
1015 else
1016 ptbl = (u32 *) ep->qp.cq_pgtbl_virt;
1017 while (num_pages--) {
1018 if (cnic_dev_10g) {
1019 /* PTE is written in little endian format for 57710 */
1020 *ptbl = (u32) page;
1021 ptbl++;
1022 *ptbl = (u32) ((u64) page >> 32);
1023 ptbl++;
be1fefc2 1024 page += CNIC_PAGE_SIZE;
cf4e6363
MC		 1025 } else {
1026 /* PTE is written in big endian format for
1027 * 5706/5708/5709 devices */
1028 *ptbl = (u32) ((u64) page >> 32);
1029 ptbl++;
1030 *ptbl = (u32) page;
1031 ptbl++;
be1fefc2 1032 page += CNIC_PAGE_SIZE;
cf4e6363
MC		 1033 }
1034 }
1035}
1036
1037
1038/**
1039 * bnx2i_alloc_qp_resc - allocates required resources for QP.
1040 * @hba: adapter structure pointer
3f79410c 1041 * @ep: endpoint (transport identifier) structure
cf4e6363
MC		 1042 *
1043 * Allocate QP (transport layer for iSCSI connection) resources, DMA'able
1044 * memory for SQ/RQ/CQ and page tables. EP structure elements such
1045 * as producer/consumer indexes/pointers, queue sizes and page table
1046 * contents are setup
1047 */
1048int bnx2i_alloc_qp_resc(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
1049{
1050 struct bnx2i_5771x_cq_db *cq_db;
1051
1052 ep->hba = hba;
1053 ep->conn = NULL;
1054 ep->ep_cid = ep->ep_iscsi_cid = ep->ep_pg_cid = 0;
1055
1056 /* Allocate page table memory for SQ which is page aligned */
1057 ep->qp.sq_mem_size = hba->max_sqes * BNX2I_SQ_WQE_SIZE;
1058 ep->qp.sq_mem_size =
be1fefc2 1059 (ep->qp.sq_mem_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK;
cf4e6363 1060 ep->qp.sq_pgtbl_size =
be1fefc2 1061 (ep->qp.sq_mem_size / CNIC_PAGE_SIZE) * sizeof(void *);
cf4e6363 1062 ep->qp.sq_pgtbl_size =
be1fefc2 1063 (ep->qp.sq_pgtbl_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK;
cf4e6363
MC		 1064
1065 ep->qp.sq_pgtbl_virt =
1066 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.sq_pgtbl_size,
1067 &ep->qp.sq_pgtbl_phys, GFP_KERNEL);
1068 if (!ep->qp.sq_pgtbl_virt) {
1069 printk(KERN_ALERT "bnx2i: unable to alloc SQ PT mem (%d)\n",
1070 ep->qp.sq_pgtbl_size);
1071 goto mem_alloc_err;
1072 }
1073
1074 /* Allocate memory area for actual SQ element */
1075 ep->qp.sq_virt =
1076 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.sq_mem_size,
1077 &ep->qp.sq_phys, GFP_KERNEL);
1078 if (!ep->qp.sq_virt) {
1079 printk(KERN_ALERT "bnx2i: unable to alloc SQ BD memory %d\n",
1080 ep->qp.sq_mem_size);
1081 goto mem_alloc_err;
1082 }
1083
1084 memset(ep->qp.sq_virt, 0x00, ep->qp.sq_mem_size);
1085 ep->qp.sq_first_qe = ep->qp.sq_virt;
1086 ep->qp.sq_prod_qe = ep->qp.sq_first_qe;
1087 ep->qp.sq_cons_qe = ep->qp.sq_first_qe;
1088 ep->qp.sq_last_qe = &ep->qp.sq_first_qe[hba->max_sqes - 1];
1089 ep->qp.sq_prod_idx = 0;
1090 ep->qp.sq_cons_idx = 0;
1091 ep->qp.sqe_left = hba->max_sqes;
1092
1093 /* Allocate page table memory for CQ which is page aligned */
1094 ep->qp.cq_mem_size = hba->max_cqes * BNX2I_CQE_SIZE;
1095 ep->qp.cq_mem_size =
be1fefc2 1096 (ep->qp.cq_mem_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK;
cf4e6363 1097 ep->qp.cq_pgtbl_size =
be1fefc2 1098 (ep->qp.cq_mem_size / CNIC_PAGE_SIZE) * sizeof(void *);
cf4e6363 1099 ep->qp.cq_pgtbl_size =
be1fefc2 1100 (ep->qp.cq_pgtbl_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK;
cf4e6363
MC		 1101
1102 ep->qp.cq_pgtbl_virt =
1103 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.cq_pgtbl_size,
1104 &ep->qp.cq_pgtbl_phys, GFP_KERNEL);
1105 if (!ep->qp.cq_pgtbl_virt) {
1106 printk(KERN_ALERT "bnx2i: unable to alloc CQ PT memory %d\n",
1107 ep->qp.cq_pgtbl_size);
1108 goto mem_alloc_err;
1109 }
1110
1111 /* Allocate memory area for actual CQ element */
1112 ep->qp.cq_virt =
1113 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.cq_mem_size,
1114 &ep->qp.cq_phys, GFP_KERNEL);
1115 if (!ep->qp.cq_virt) {
1116 printk(KERN_ALERT "bnx2i: unable to alloc CQ BD memory %d\n",
1117 ep->qp.cq_mem_size);
1118 goto mem_alloc_err;
1119 }
1120 memset(ep->qp.cq_virt, 0x00, ep->qp.cq_mem_size);
1121
1122 ep->qp.cq_first_qe = ep->qp.cq_virt;
1123 ep->qp.cq_prod_qe = ep->qp.cq_first_qe;
1124 ep->qp.cq_cons_qe = ep->qp.cq_first_qe;
1125 ep->qp.cq_last_qe = &ep->qp.cq_first_qe[hba->max_cqes - 1];
1126 ep->qp.cq_prod_idx = 0;
1127 ep->qp.cq_cons_idx = 0;
1128 ep->qp.cqe_left = hba->max_cqes;
1129 ep->qp.cqe_exp_seq_sn = ISCSI_INITIAL_SN;
1130 ep->qp.cqe_size = hba->max_cqes;
1131
1132 /* Invalidate all EQ CQE index, req only for 57710 */
1133 cq_db = (struct bnx2i_5771x_cq_db *) ep->qp.cq_pgtbl_virt;
1134 memset(cq_db->sqn, 0xFF, sizeof(cq_db->sqn[0]) * BNX2X_MAX_CQS);
1135
1136 /* Allocate page table memory for RQ which is page aligned */
1137 ep->qp.rq_mem_size = hba->max_rqes * BNX2I_RQ_WQE_SIZE;
1138 ep->qp.rq_mem_size =
be1fefc2 1139 (ep->qp.rq_mem_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK;
cf4e6363 1140 ep->qp.rq_pgtbl_size =
be1fefc2 1141 (ep->qp.rq_mem_size / CNIC_PAGE_SIZE) * sizeof(void *);
cf4e6363 1142 ep->qp.rq_pgtbl_size =
be1fefc2 1143 (ep->qp.rq_pgtbl_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK;
cf4e6363
MC		 1144
1145 ep->qp.rq_pgtbl_virt =
1146 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.rq_pgtbl_size,
1147 &ep->qp.rq_pgtbl_phys, GFP_KERNEL);
1148 if (!ep->qp.rq_pgtbl_virt) {
1149 printk(KERN_ALERT "bnx2i: unable to alloc RQ PT mem %d\n",
1150 ep->qp.rq_pgtbl_size);
1151 goto mem_alloc_err;
1152 }
1153
1154 /* Allocate memory area for actual RQ element */
1155 ep->qp.rq_virt =
1156 dma_alloc_coherent(&hba->pcidev->dev, ep->qp.rq_mem_size,
1157 &ep->qp.rq_phys, GFP_KERNEL);
1158 if (!ep->qp.rq_virt) {
1159 printk(KERN_ALERT "bnx2i: unable to alloc RQ BD memory %d\n",
1160 ep->qp.rq_mem_size);
1161 goto mem_alloc_err;
1162 }
1163
1164 ep->qp.rq_first_qe = ep->qp.rq_virt;
1165 ep->qp.rq_prod_qe = ep->qp.rq_first_qe;
1166 ep->qp.rq_cons_qe = ep->qp.rq_first_qe;
1167 ep->qp.rq_last_qe = &ep->qp.rq_first_qe[hba->max_rqes - 1];
1168 ep->qp.rq_prod_idx = 0x8000;
1169 ep->qp.rq_cons_idx = 0;
1170 ep->qp.rqe_left = hba->max_rqes;
1171
1172 setup_qp_page_tables(ep);
1173
1174 return 0;
1175
1176mem_alloc_err:
1177 bnx2i_free_qp_resc(hba, ep);
1178 return -ENOMEM;
1179}
1180
1181
1182
1183/**
1184 * bnx2i_free_qp_resc - free memory resources held by QP
1185 * @hba: adapter structure pointer
3f79410c 1186 * @ep: endpoint (transport identifier) structure
cf4e6363
MC		 1187 *
1188 * Free QP resources - SQ/RQ/CQ memory and page tables.
1189 */
1190void bnx2i_free_qp_resc(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
1191{
1192 if (ep->qp.ctx_base) {
1193 iounmap(ep->qp.ctx_base);
1194 ep->qp.ctx_base = NULL;
1195 }
1196 /* Free SQ mem */
1197 if (ep->qp.sq_pgtbl_virt) {
1198 dma_free_coherent(&hba->pcidev->dev, ep->qp.sq_pgtbl_size,
1199 ep->qp.sq_pgtbl_virt, ep->qp.sq_pgtbl_phys);
1200 ep->qp.sq_pgtbl_virt = NULL;
1201 ep->qp.sq_pgtbl_phys = 0;
1202 }
1203 if (ep->qp.sq_virt) {
1204 dma_free_coherent(&hba->pcidev->dev, ep->qp.sq_mem_size,
1205 ep->qp.sq_virt, ep->qp.sq_phys);
1206 ep->qp.sq_virt = NULL;
1207 ep->qp.sq_phys = 0;
1208 }
1209
1210 /* Free RQ mem */
1211 if (ep->qp.rq_pgtbl_virt) {
1212 dma_free_coherent(&hba->pcidev->dev, ep->qp.rq_pgtbl_size,
1213 ep->qp.rq_pgtbl_virt, ep->qp.rq_pgtbl_phys);
1214 ep->qp.rq_pgtbl_virt = NULL;
1215 ep->qp.rq_pgtbl_phys = 0;
1216 }
1217 if (ep->qp.rq_virt) {
1218 dma_free_coherent(&hba->pcidev->dev, ep->qp.rq_mem_size,
1219 ep->qp.rq_virt, ep->qp.rq_phys);
1220 ep->qp.rq_virt = NULL;
1221 ep->qp.rq_phys = 0;
1222 }
1223
1224 /* Free CQ mem */
1225 if (ep->qp.cq_pgtbl_virt) {
1226 dma_free_coherent(&hba->pcidev->dev, ep->qp.cq_pgtbl_size,
1227 ep->qp.cq_pgtbl_virt, ep->qp.cq_pgtbl_phys);
1228 ep->qp.cq_pgtbl_virt = NULL;
1229 ep->qp.cq_pgtbl_phys = 0;
1230 }
1231 if (ep->qp.cq_virt) {
1232 dma_free_coherent(&hba->pcidev->dev, ep->qp.cq_mem_size,
1233 ep->qp.cq_virt, ep->qp.cq_phys);
1234 ep->qp.cq_virt = NULL;
1235 ep->qp.cq_phys = 0;
1236 }
1237}
1238
1239
1240/**
1241 * bnx2i_send_fw_iscsi_init_msg - initiates initial handshake with iscsi f/w
1242 * @hba: adapter structure pointer
1243 *
1244 * Send down iscsi_init KWQEs which initiates the initial handshake with the f/w
1245 * This results in iSCSi support validation and on-chip context manager
1246 * initialization. Firmware completes this handshake with a CQE carrying
1247 * the result of iscsi support validation. Parameter carried by
1248 * iscsi init request determines the number of offloaded connection and
1249 * tolerance level for iscsi protocol violation this hba/chip can support
1250 */
1251int bnx2i_send_fw_iscsi_init_msg(struct bnx2i_hba *hba)
1252{
1253 struct kwqe *kwqe_arr[3];
1254 struct iscsi_kwqe_init1 iscsi_init;
1255 struct iscsi_kwqe_init2 iscsi_init2;
1256 int rc = 0;
1257 u64 mask64;
1258
d6532207
EW		 1259 memset(&iscsi_init, 0x00, sizeof(struct iscsi_kwqe_init1));
1260 memset(&iscsi_init2, 0x00, sizeof(struct iscsi_kwqe_init2));
1261
cf4e6363
MC		 1262 bnx2i_adjust_qp_size(hba);
1263
1264 iscsi_init.flags =
be1fefc2 1265 (CNIC_PAGE_BITS - 8) << ISCSI_KWQE_INIT1_PAGE_SIZE_SHIFT;
cf4e6363
MC		 1266 if (en_tcp_dack)
1267 iscsi_init.flags |= ISCSI_KWQE_INIT1_DELAYED_ACK_ENABLE;
1268 iscsi_init.reserved0 = 0;
1269 iscsi_init.num_cqs = 1;
1270 iscsi_init.hdr.op_code = ISCSI_KWQE_OPCODE_INIT1;
1271 iscsi_init.hdr.flags =
1272 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
1273
1274 iscsi_init.dummy_buffer_addr_lo = (u32) hba->dummy_buf_dma;
1275 iscsi_init.dummy_buffer_addr_hi =
1276 (u32) ((u64) hba->dummy_buf_dma >> 32);
1277
7287c63e 1278 hba->num_ccell = hba->max_sqes >> 1;
cf4e6363
MC		 1279 hba->ctx_ccell_tasks =
1280 ((hba->num_ccell & 0xFFFF) | (hba->max_sqes << 16));
1281 iscsi_init.num_ccells_per_conn = hba->num_ccell;
1282 iscsi_init.num_tasks_per_conn = hba->max_sqes;
be1fefc2 1283 iscsi_init.sq_wqes_per_page = CNIC_PAGE_SIZE / BNX2I_SQ_WQE_SIZE;
cf4e6363
MC		 1284 iscsi_init.sq_num_wqes = hba->max_sqes;
1285 iscsi_init.cq_log_wqes_per_page =
be1fefc2 1286 (u8) bnx2i_power_of2(CNIC_PAGE_SIZE / BNX2I_CQE_SIZE);
cf4e6363
MC		 1287 iscsi_init.cq_num_wqes = hba->max_cqes;
1288 iscsi_init.cq_num_pages = (hba->max_cqes * BNX2I_CQE_SIZE +
be1fefc2 1289 (CNIC_PAGE_SIZE - 1)) / CNIC_PAGE_SIZE;
cf4e6363 1290 iscsi_init.sq_num_pages = (hba->max_sqes * BNX2I_SQ_WQE_SIZE +
be1fefc2 1291 (CNIC_PAGE_SIZE - 1)) / CNIC_PAGE_SIZE;
cf4e6363
MC		 1292 iscsi_init.rq_buffer_size = BNX2I_RQ_WQE_SIZE;
1293 iscsi_init.rq_num_wqes = hba->max_rqes;
1294
1295
1296 iscsi_init2.hdr.op_code = ISCSI_KWQE_OPCODE_INIT2;
1297 iscsi_init2.hdr.flags =
1298 (ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
1299 iscsi_init2.max_cq_sqn = hba->max_cqes * 2 + 1;
1300 mask64 = 0x0ULL;
1301 mask64 |= (
1302 /* CISCO MDS */
1303 (1UL <<
1304 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_NOT_RSRV) |
1305 /* HP MSA1510i */
1306 (1UL <<
1307 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_EXP_DATASN) |
1308 /* EMC */
1309 (1ULL << ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_LUN));
70fc872c 1310 if (error_mask1) {
cf4e6363 1311 iscsi_init2.error_bit_map[0] = error_mask1;
d4a0d607 1312 mask64 ^= (u32)(mask64);
70fc872c
EW		 1313 mask64 |= error_mask1;
1314 } else
cf4e6363
MC		 1315 iscsi_init2.error_bit_map[0] = (u32) mask64;
1316
70fc872c 1317 if (error_mask2) {
cf4e6363 1318 iscsi_init2.error_bit_map[1] = error_mask2;
70fc872c
EW		 1319 mask64 &= 0xffffffff;
1320 mask64 |= ((u64)error_mask2 << 32);
1321 } else
cf4e6363
MC		 1322 iscsi_init2.error_bit_map[1] = (u32) (mask64 >> 32);
1323
1324 iscsi_error_mask = mask64;
1325
1326 kwqe_arr[0] = (struct kwqe *) &iscsi_init;
1327 kwqe_arr[1] = (struct kwqe *) &iscsi_init2;
1328
1329 if (hba->cnic && hba->cnic->submit_kwqes)
1330 rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 2);
1331 return rc;
1332}
1333
1334
1335/**
1336 * bnx2i_process_scsi_cmd_resp - this function handles scsi cmd completion.
b5cf6b63
EW		 1337 * @session: iscsi session
1338 * @bnx2i_conn: bnx2i connection
cf4e6363
MC		 1339 * @cqe: pointer to newly DMA'ed CQE entry for processing
1340 *
1341 * process SCSI CMD Response CQE & complete the request to SCSI-ML
1342 */
b5cf6b63
EW		 1343int bnx2i_process_scsi_cmd_resp(struct iscsi_session *session,
1344 struct bnx2i_conn *bnx2i_conn,
1345 struct cqe *cqe)
cf4e6363
MC		 1346{
1347 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
2e499d3c 1348 struct bnx2i_hba *hba = bnx2i_conn->hba;
cf4e6363
MC		 1349 struct bnx2i_cmd_response *resp_cqe;
1350 struct bnx2i_cmd *bnx2i_cmd;
1351 struct iscsi_task *task;
12352183 1352 struct iscsi_scsi_rsp *hdr;
cf4e6363
MC		 1353 u32 datalen = 0;
1354
1355 resp_cqe = (struct bnx2i_cmd_response *)cqe;
659743b0 1356 spin_lock_bh(&session->back_lock);
cf4e6363
MC		 1357 task = iscsi_itt_to_task(conn,
1358 resp_cqe->itt & ISCSI_CMD_RESPONSE_INDEX);
1359 if (!task)
1360 goto fail;
1361
1362 bnx2i_cmd = task->dd_data;
1363
1364 if (bnx2i_cmd->req.op_attr & ISCSI_CMD_REQUEST_READ) {
1365 conn->datain_pdus_cnt +=
2e499d3c 1366 resp_cqe->task_stat.read_stat.num_data_ins;
cf4e6363
MC		 1367 conn->rxdata_octets +=
1368 bnx2i_cmd->req.total_data_transfer_length;
2e499d3c
BW		 1369 ADD_STATS_64(hba, rx_pdus,
1370 resp_cqe->task_stat.read_stat.num_data_ins);
1371 ADD_STATS_64(hba, rx_bytes,
1372 bnx2i_cmd->req.total_data_transfer_length);
cf4e6363
MC		 1373 } else {
1374 conn->dataout_pdus_cnt +=
2e499d3c 1375 resp_cqe->task_stat.write_stat.num_data_outs;
cf4e6363 1376 conn->r2t_pdus_cnt +=
2e499d3c 1377 resp_cqe->task_stat.write_stat.num_r2ts;
cf4e6363
MC		 1378 conn->txdata_octets +=
1379 bnx2i_cmd->req.total_data_transfer_length;
2e499d3c
BW		 1380 ADD_STATS_64(hba, tx_pdus,
1381 resp_cqe->task_stat.write_stat.num_data_outs);
1382 ADD_STATS_64(hba, tx_bytes,
1383 bnx2i_cmd->req.total_data_transfer_length);
1384 ADD_STATS_64(hba, rx_pdus,
1385 resp_cqe->task_stat.write_stat.num_r2ts);
cf4e6363
MC		 1386 }
1387 bnx2i_iscsi_unmap_sg_list(bnx2i_cmd);
1388
12352183 1389 hdr = (struct iscsi_scsi_rsp *)task->hdr;
cf4e6363
MC		 1390 resp_cqe = (struct bnx2i_cmd_response *)cqe;
1391 hdr->opcode = resp_cqe->op_code;
1392 hdr->max_cmdsn = cpu_to_be32(resp_cqe->max_cmd_sn);
1393 hdr->exp_cmdsn = cpu_to_be32(resp_cqe->exp_cmd_sn);
1394 hdr->response = resp_cqe->response;
1395 hdr->cmd_status = resp_cqe->status;
1396 hdr->flags = resp_cqe->response_flags;
1397 hdr->residual_count = cpu_to_be32(resp_cqe->residual_count);
1398
1399 if (resp_cqe->op_code == ISCSI_OP_SCSI_DATA_IN)
1400 goto done;
1401
1402 if (resp_cqe->status == SAM_STAT_CHECK_CONDITION) {
1403 datalen = resp_cqe->data_length;
1404 if (datalen < 2)
1405 goto done;
1406
1407 if (datalen > BNX2I_RQ_WQE_SIZE) {
1408 iscsi_conn_printk(KERN_ERR, conn,
1409 "sense data len %d > RQ sz\n",
1410 datalen);
1411 datalen = BNX2I_RQ_WQE_SIZE;
1412 } else if (datalen > ISCSI_DEF_MAX_RECV_SEG_LEN) {
1413 iscsi_conn_printk(KERN_ERR, conn,
1414 "sense data len %d > conn data\n",
1415 datalen);
1416 datalen = ISCSI_DEF_MAX_RECV_SEG_LEN;
1417 }
1418
1419 bnx2i_get_rq_buf(bnx2i_cmd->conn, conn->data, datalen);
1420 bnx2i_put_rq_buf(bnx2i_cmd->conn, 1);
1421 }
1422
1423done:
1424 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr,
1425 conn->data, datalen);
1426fail:
659743b0 1427 spin_unlock_bh(&session->back_lock);
cf4e6363
MC		 1428 return 0;
1429}
1430
1431
1432/**
1433 * bnx2i_process_login_resp - this function handles iscsi login response
1434 * @session: iscsi session pointer
1435 * @bnx2i_conn: iscsi connection pointer
1436 * @cqe: pointer to newly DMA'ed CQE entry for processing
1437 *
1438 * process Login Response CQE & complete it to open-iscsi user daemon
1439 */
1440static int bnx2i_process_login_resp(struct iscsi_session *session,
1441 struct bnx2i_conn *bnx2i_conn,
1442 struct cqe *cqe)
1443{
1444 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1445 struct iscsi_task *task;
1446 struct bnx2i_login_response *login;
1447 struct iscsi_login_rsp *resp_hdr;
1448 int pld_len;
1449 int pad_len;
1450
1451 login = (struct bnx2i_login_response *) cqe;
659743b0 1452 spin_lock(&session->back_lock);
cf4e6363
MC		 1453 task = iscsi_itt_to_task(conn,
1454 login->itt & ISCSI_LOGIN_RESPONSE_INDEX);
1455 if (!task)
1456 goto done;
1457
1458 resp_hdr = (struct iscsi_login_rsp *) &bnx2i_conn->gen_pdu.resp_hdr;
1459 memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1460 resp_hdr->opcode = login->op_code;
1461 resp_hdr->flags = login->response_flags;
1462 resp_hdr->max_version = login->version_max;
a419aef8 1463 resp_hdr->active_version = login->version_active;
cf4e6363
MC		 1464 resp_hdr->hlength = 0;
1465
1466 hton24(resp_hdr->dlength, login->data_length);
1467 memcpy(resp_hdr->isid, &login->isid_lo, 6);
1468 resp_hdr->tsih = cpu_to_be16(login->tsih);
1469 resp_hdr->itt = task->hdr->itt;
1470 resp_hdr->statsn = cpu_to_be32(login->stat_sn);
1471 resp_hdr->exp_cmdsn = cpu_to_be32(login->exp_cmd_sn);
1472 resp_hdr->max_cmdsn = cpu_to_be32(login->max_cmd_sn);
1473 resp_hdr->status_class = login->status_class;
1474 resp_hdr->status_detail = login->status_detail;
1475 pld_len = login->data_length;
1476 bnx2i_conn->gen_pdu.resp_wr_ptr =
1477 bnx2i_conn->gen_pdu.resp_buf + pld_len;
1478
1479 pad_len = 0;
1480 if (pld_len & 0x3)
1481 pad_len = 4 - (pld_len % 4);
1482
1483 if (pad_len) {
1484 int i = 0;
1485 for (i = 0; i < pad_len; i++) {
1486 bnx2i_conn->gen_pdu.resp_wr_ptr[0] = 0;
1487 bnx2i_conn->gen_pdu.resp_wr_ptr++;
1488 }
1489 }
1490
1491 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr,
1492 bnx2i_conn->gen_pdu.resp_buf,
1493 bnx2i_conn->gen_pdu.resp_wr_ptr - bnx2i_conn->gen_pdu.resp_buf);
1494done:
659743b0 1495 spin_unlock(&session->back_lock);
cf4e6363
MC		 1496 return 0;
1497}
1498
09813ba5
EW		 1499
1500/**
1501 * bnx2i_process_text_resp - this function handles iscsi text response
1502 * @session: iscsi session pointer
1503 * @bnx2i_conn: iscsi connection pointer
1504 * @cqe: pointer to newly DMA'ed CQE entry for processing
1505 *
1506 * process iSCSI Text Response CQE& complete it to open-iscsi user daemon
1507 */
1508static int bnx2i_process_text_resp(struct iscsi_session *session,
1509 struct bnx2i_conn *bnx2i_conn,
1510 struct cqe *cqe)
1511{
1512 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1513 struct iscsi_task *task;
1514 struct bnx2i_text_response *text;
1515 struct iscsi_text_rsp *resp_hdr;
1516 int pld_len;
1517 int pad_len;
1518
1519 text = (struct bnx2i_text_response *) cqe;
659743b0 1520 spin_lock(&session->back_lock);
09813ba5
EW		 1521 task = iscsi_itt_to_task(conn, text->itt & ISCSI_LOGIN_RESPONSE_INDEX);
1522 if (!task)
1523 goto done;
1524
1525 resp_hdr = (struct iscsi_text_rsp *)&bnx2i_conn->gen_pdu.resp_hdr;
1526 memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1527 resp_hdr->opcode = text->op_code;
1528 resp_hdr->flags = text->response_flags;
1529 resp_hdr->hlength = 0;
1530
1531 hton24(resp_hdr->dlength, text->data_length);
1532 resp_hdr->itt = task->hdr->itt;
1533 resp_hdr->ttt = cpu_to_be32(text->ttt);
1534 resp_hdr->statsn = task->hdr->exp_statsn;
1535 resp_hdr->exp_cmdsn = cpu_to_be32(text->exp_cmd_sn);
1536 resp_hdr->max_cmdsn = cpu_to_be32(text->max_cmd_sn);
1537 pld_len = text->data_length;
1538 bnx2i_conn->gen_pdu.resp_wr_ptr = bnx2i_conn->gen_pdu.resp_buf +
1539 pld_len;
1540 pad_len = 0;
1541 if (pld_len & 0x3)
1542 pad_len = 4 - (pld_len % 4);
1543
1544 if (pad_len) {
1545 int i = 0;
1546 for (i = 0; i < pad_len; i++) {
1547 bnx2i_conn->gen_pdu.resp_wr_ptr[0] = 0;
1548 bnx2i_conn->gen_pdu.resp_wr_ptr++;
1549 }
1550 }
1551 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr,
1552 bnx2i_conn->gen_pdu.resp_buf,
1553 bnx2i_conn->gen_pdu.resp_wr_ptr -
1554 bnx2i_conn->gen_pdu.resp_buf);
1555done:
659743b0 1556 spin_unlock(&session->back_lock);
09813ba5
EW		 1557 return 0;
1558}
1559
1560
cf4e6363
MC		 1561/**
1562 * bnx2i_process_tmf_resp - this function handles iscsi TMF response
1563 * @session: iscsi session pointer
1564 * @bnx2i_conn: iscsi connection pointer
1565 * @cqe: pointer to newly DMA'ed CQE entry for processing
1566 *
1567 * process iSCSI TMF Response CQE and wake up the driver eh thread.
1568 */
1569static int bnx2i_process_tmf_resp(struct iscsi_session *session,
1570 struct bnx2i_conn *bnx2i_conn,
1571 struct cqe *cqe)
1572{
1573 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1574 struct iscsi_task *task;
1575 struct bnx2i_tmf_response *tmf_cqe;
1576 struct iscsi_tm_rsp *resp_hdr;
1577
1578 tmf_cqe = (struct bnx2i_tmf_response *)cqe;
659743b0 1579 spin_lock(&session->back_lock);
cf4e6363
MC		 1580 task = iscsi_itt_to_task(conn,
1581 tmf_cqe->itt & ISCSI_TMF_RESPONSE_INDEX);
1582 if (!task)
1583 goto done;
1584
1585 resp_hdr = (struct iscsi_tm_rsp *) &bnx2i_conn->gen_pdu.resp_hdr;
1586 memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1587 resp_hdr->opcode = tmf_cqe->op_code;
1588 resp_hdr->max_cmdsn = cpu_to_be32(tmf_cqe->max_cmd_sn);
1589 resp_hdr->exp_cmdsn = cpu_to_be32(tmf_cqe->exp_cmd_sn);
1590 resp_hdr->itt = task->hdr->itt;
1591 resp_hdr->response = tmf_cqe->response;
1592
1593 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0);
1594done:
659743b0 1595 spin_unlock(&session->back_lock);
cf4e6363
MC		 1596 return 0;
1597}
1598
1599/**
1600 * bnx2i_process_logout_resp - this function handles iscsi logout response
1601 * @session: iscsi session pointer
1602 * @bnx2i_conn: iscsi connection pointer
1603 * @cqe: pointer to newly DMA'ed CQE entry for processing
1604 *
1605 * process iSCSI Logout Response CQE & make function call to
1606 * notify the user daemon.
1607 */
1608static int bnx2i_process_logout_resp(struct iscsi_session *session,
1609 struct bnx2i_conn *bnx2i_conn,
1610 struct cqe *cqe)
1611{
1612 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1613 struct iscsi_task *task;
1614 struct bnx2i_logout_response *logout;
1615 struct iscsi_logout_rsp *resp_hdr;
1616
1617 logout = (struct bnx2i_logout_response *) cqe;
659743b0 1618 spin_lock(&session->back_lock);
cf4e6363
MC		 1619 task = iscsi_itt_to_task(conn,
1620 logout->itt & ISCSI_LOGOUT_RESPONSE_INDEX);
1621 if (!task)
1622 goto done;
1623
1624 resp_hdr = (struct iscsi_logout_rsp *) &bnx2i_conn->gen_pdu.resp_hdr;
1625 memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1626 resp_hdr->opcode = logout->op_code;
1627 resp_hdr->flags = logout->response;
1628 resp_hdr->hlength = 0;
1629
1630 resp_hdr->itt = task->hdr->itt;
1631 resp_hdr->statsn = task->hdr->exp_statsn;
1632 resp_hdr->exp_cmdsn = cpu_to_be32(logout->exp_cmd_sn);
1633 resp_hdr->max_cmdsn = cpu_to_be32(logout->max_cmd_sn);
1634
1635 resp_hdr->t2wait = cpu_to_be32(logout->time_to_wait);
1636 resp_hdr->t2retain = cpu_to_be32(logout->time_to_retain);
1637
1638 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0);
2eefb20d
EW		 1639
1640 bnx2i_conn->ep->state = EP_STATE_LOGOUT_RESP_RCVD;
cf4e6363 1641done:
659743b0 1642 spin_unlock(&session->back_lock);
cf4e6363
MC		 1643 return 0;
1644}
1645
1646/**
1647 * bnx2i_process_nopin_local_cmpl - this function handles iscsi nopin CQE
1648 * @session: iscsi session pointer
1649 * @bnx2i_conn: iscsi connection pointer
1650 * @cqe: pointer to newly DMA'ed CQE entry for processing
1651 *
1652 * process iSCSI NOPIN local completion CQE, frees IIT and command structures
1653 */
1654static void bnx2i_process_nopin_local_cmpl(struct iscsi_session *session,
1655 struct bnx2i_conn *bnx2i_conn,
1656 struct cqe *cqe)
1657{
1658 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1659 struct bnx2i_nop_in_msg *nop_in;
1660 struct iscsi_task *task;
1661
1662 nop_in = (struct bnx2i_nop_in_msg *)cqe;
659743b0 1663 spin_lock(&session->back_lock);
cf4e6363
MC		 1664 task = iscsi_itt_to_task(conn,
1665 nop_in->itt & ISCSI_NOP_IN_MSG_INDEX);
1666 if (task)
8eea2f55 1667 __iscsi_put_task(task);
659743b0 1668 spin_unlock(&session->back_lock);
cf4e6363
MC		 1669}
1670
1671/**
1672 * bnx2i_unsol_pdu_adjust_rq - makes adjustments to RQ after unsol pdu is recvd
1673 * @conn: iscsi connection
1674 *
1675 * Firmware advances RQ producer index for every unsolicited PDU even if
1676 * payload data length is '0'. This function makes corresponding
1677 * adjustments on the driver side to match this f/w behavior
1678 */
1679static void bnx2i_unsol_pdu_adjust_rq(struct bnx2i_conn *bnx2i_conn)
1680{
1681 char dummy_rq_data[2];
1682 bnx2i_get_rq_buf(bnx2i_conn, dummy_rq_data, 1);
1683 bnx2i_put_rq_buf(bnx2i_conn, 1);
1684}
1685
1686
1687/**
1688 * bnx2i_process_nopin_mesg - this function handles iscsi nopin CQE
1689 * @session: iscsi session pointer
1690 * @bnx2i_conn: iscsi connection pointer
1691 * @cqe: pointer to newly DMA'ed CQE entry for processing
1692 *
1693 * process iSCSI target's proactive iSCSI NOPIN request
1694 */
1695static int bnx2i_process_nopin_mesg(struct iscsi_session *session,
1696 struct bnx2i_conn *bnx2i_conn,
1697 struct cqe *cqe)
1698{
1699 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1700 struct iscsi_task *task;
1701 struct bnx2i_nop_in_msg *nop_in;
1702 struct iscsi_nopin *hdr;
cf4e6363
MC		 1703 int tgt_async_nop = 0;
1704
1705 nop_in = (struct bnx2i_nop_in_msg *)cqe;
cf4e6363 1706
659743b0 1707 spin_lock(&session->back_lock);
cf4e6363
MC		 1708 hdr = (struct iscsi_nopin *)&bnx2i_conn->gen_pdu.resp_hdr;
1709 memset(hdr, 0, sizeof(struct iscsi_hdr));
1710 hdr->opcode = nop_in->op_code;
1711 hdr->max_cmdsn = cpu_to_be32(nop_in->max_cmd_sn);
1712 hdr->exp_cmdsn = cpu_to_be32(nop_in->exp_cmd_sn);
1713 hdr->ttt = cpu_to_be32(nop_in->ttt);
1714
5ee32576 1715 if (nop_in->itt == (u16) RESERVED_ITT) {
cf4e6363
MC		 1716 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
1717 hdr->itt = RESERVED_ITT;
1718 tgt_async_nop = 1;
1719 goto done;
1720 }
1721
1722 /* this is a response to one of our nop-outs */
5ee32576
EW		 1723 task = iscsi_itt_to_task(conn,
1724 (itt_t) (nop_in->itt & ISCSI_NOP_IN_MSG_INDEX));
cf4e6363
MC		 1725 if (task) {
1726 hdr->flags = ISCSI_FLAG_CMD_FINAL;
1727 hdr->itt = task->hdr->itt;
1728 hdr->ttt = cpu_to_be32(nop_in->ttt);
516f43a2 1729 memcpy(&hdr->lun, nop_in->lun, 8);
cf4e6363
MC		 1730 }
1731done:
1732 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, NULL, 0);
659743b0 1733 spin_unlock(&session->back_lock);
cf4e6363
MC		 1734
1735 return tgt_async_nop;
1736}
1737
1738
1739/**
1740 * bnx2i_process_async_mesg - this function handles iscsi async message
1741 * @session: iscsi session pointer
1742 * @bnx2i_conn: iscsi connection pointer
1743 * @cqe: pointer to newly DMA'ed CQE entry for processing
1744 *
1745 * process iSCSI ASYNC Message
1746 */
1747static void bnx2i_process_async_mesg(struct iscsi_session *session,
1748 struct bnx2i_conn *bnx2i_conn,
1749 struct cqe *cqe)
1750{
1751 struct bnx2i_async_msg *async_cqe;
1752 struct iscsi_async *resp_hdr;
1753 u8 async_event;
1754
1755 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
1756
1757 async_cqe = (struct bnx2i_async_msg *)cqe;
1758 async_event = async_cqe->async_event;
1759
1760 if (async_event == ISCSI_ASYNC_MSG_SCSI_EVENT) {
1761 iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data,
1762 "async: scsi events not supported\n");
1763 return;
1764 }
1765
659743b0 1766 spin_lock(&session->back_lock);
cf4e6363
MC		 1767 resp_hdr = (struct iscsi_async *) &bnx2i_conn->gen_pdu.resp_hdr;
1768 memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
1769 resp_hdr->opcode = async_cqe->op_code;
1770 resp_hdr->flags = 0x80;
1771
516f43a2 1772 memcpy(&resp_hdr->lun, async_cqe->lun, 8);
cf4e6363
MC		 1773 resp_hdr->exp_cmdsn = cpu_to_be32(async_cqe->exp_cmd_sn);
1774 resp_hdr->max_cmdsn = cpu_to_be32(async_cqe->max_cmd_sn);
1775
1776 resp_hdr->async_event = async_cqe->async_event;
1777 resp_hdr->async_vcode = async_cqe->async_vcode;
1778
1779 resp_hdr->param1 = cpu_to_be16(async_cqe->param1);
1780 resp_hdr->param2 = cpu_to_be16(async_cqe->param2);
1781 resp_hdr->param3 = cpu_to_be16(async_cqe->param3);
1782
1783 __iscsi_complete_pdu(bnx2i_conn->cls_conn->dd_data,
1784 (struct iscsi_hdr *)resp_hdr, NULL, 0);
659743b0 1785 spin_unlock(&session->back_lock);
cf4e6363
MC		 1786}
1787
1788
1789/**
1790 * bnx2i_process_reject_mesg - process iscsi reject pdu
1791 * @session: iscsi session pointer
1792 * @bnx2i_conn: iscsi connection pointer
1793 * @cqe: pointer to newly DMA'ed CQE entry for processing
1794 *
1795 * process iSCSI REJECT message
1796 */
1797static void bnx2i_process_reject_mesg(struct iscsi_session *session,
1798 struct bnx2i_conn *bnx2i_conn,
1799 struct cqe *cqe)
1800{
1801 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1802 struct bnx2i_reject_msg *reject;
1803 struct iscsi_reject *hdr;
1804
1805 reject = (struct bnx2i_reject_msg *) cqe;
1806 if (reject->data_length) {
1807 bnx2i_get_rq_buf(bnx2i_conn, conn->data, reject->data_length);
1808 bnx2i_put_rq_buf(bnx2i_conn, 1);
1809 } else
1810 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
1811
659743b0 1812 spin_lock(&session->back_lock);
cf4e6363
MC		 1813 hdr = (struct iscsi_reject *) &bnx2i_conn->gen_pdu.resp_hdr;
1814 memset(hdr, 0, sizeof(struct iscsi_hdr));
1815 hdr->opcode = reject->op_code;
1816 hdr->reason = reject->reason;
1817 hton24(hdr->dlength, reject->data_length);
1818 hdr->max_cmdsn = cpu_to_be32(reject->max_cmd_sn);
1819 hdr->exp_cmdsn = cpu_to_be32(reject->exp_cmd_sn);
1820 hdr->ffffffff = cpu_to_be32(RESERVED_ITT);
1821 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, conn->data,
1822 reject->data_length);
659743b0 1823 spin_unlock(&session->back_lock);
cf4e6363
MC		 1824}
1825
1826/**
1827 * bnx2i_process_cmd_cleanup_resp - process scsi command clean-up completion
1828 * @session: iscsi session pointer
1829 * @bnx2i_conn: iscsi connection pointer
1830 * @cqe: pointer to newly DMA'ed CQE entry for processing
1831 *
1832 * process command cleanup response CQE during conn shutdown or error recovery
1833 */
1834static void bnx2i_process_cmd_cleanup_resp(struct iscsi_session *session,
1835 struct bnx2i_conn *bnx2i_conn,
1836 struct cqe *cqe)
1837{
1838 struct bnx2i_cleanup_response *cmd_clean_rsp;
1839 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1840 struct iscsi_task *task;
1841
1842 cmd_clean_rsp = (struct bnx2i_cleanup_response *)cqe;
659743b0 1843 spin_lock(&session->back_lock);
cf4e6363
MC		 1844 task = iscsi_itt_to_task(conn,
1845 cmd_clean_rsp->itt & ISCSI_CLEANUP_RESPONSE_INDEX);
1846 if (!task)
1847 printk(KERN_ALERT "bnx2i: cmd clean ITT %x not active\n",
1848 cmd_clean_rsp->itt & ISCSI_CLEANUP_RESPONSE_INDEX);
659743b0 1849 spin_unlock(&session->back_lock);
cf4e6363
MC		 1850 complete(&bnx2i_conn->cmd_cleanup_cmpl);
1851}
1852
1853
b5cf6b63
EW		 1854/**
1855 * bnx2i_percpu_io_thread - thread per cpu for ios
1856 *
1857 * @arg: ptr to bnx2i_percpu_info structure
1858 */
1859int bnx2i_percpu_io_thread(void *arg)
1860{
1861 struct bnx2i_percpu_s *p = arg;
1862 struct bnx2i_work *work, *tmp;
1863 LIST_HEAD(work_list);
1864
8698a745 1865 set_user_nice(current, MIN_NICE);
b5cf6b63
EW		 1866
1867 while (!kthread_should_stop()) {
1868 spin_lock_bh(&p->p_work_lock);
1869 while (!list_empty(&p->work_list)) {
1870 list_splice_init(&p->work_list, &work_list);
1871 spin_unlock_bh(&p->p_work_lock);
1872
1873 list_for_each_entry_safe(work, tmp, &work_list, list) {
1874 list_del_init(&work->list);
1875 /* work allocated in the bh, freed here */
1876 bnx2i_process_scsi_cmd_resp(work->session,
1877 work->bnx2i_conn,
1878 &work->cqe);
1879 atomic_dec(&work->bnx2i_conn->work_cnt);
1880 kfree(work);
1881 }
1882 spin_lock_bh(&p->p_work_lock);
1883 }
1884 set_current_state(TASK_INTERRUPTIBLE);
1885 spin_unlock_bh(&p->p_work_lock);
1886 schedule();
1887 }
1888 __set_current_state(TASK_RUNNING);
1889
1890 return 0;
1891}
1892
1893
1894/**
1895 * bnx2i_queue_scsi_cmd_resp - queue cmd completion to the percpu thread
1896 * @bnx2i_conn: bnx2i connection
1897 *
1898 * this function is called by generic KCQ handler to queue all pending cmd
1899 * completion CQEs
1900 *
1901 * The implementation is to queue the cmd response based on the
1902 * last recorded command for the given connection. The
1903 * cpu_id gets recorded upon task_xmit. No out-of-order completion!
1904 */
1905static int bnx2i_queue_scsi_cmd_resp(struct iscsi_session *session,
1906 struct bnx2i_conn *bnx2i_conn,
1907 struct bnx2i_nop_in_msg *cqe)
1908{
1909 struct bnx2i_work *bnx2i_work = NULL;
1910 struct bnx2i_percpu_s *p = NULL;
1911 struct iscsi_task *task;
1912 struct scsi_cmnd *sc;
1913 int rc = 0;
0d83ab65 1914 int cpu;
b5cf6b63 1915
659743b0 1916 spin_lock(&session->back_lock);
b5cf6b63
EW		 1917 task = iscsi_itt_to_task(bnx2i_conn->cls_conn->dd_data,
1918 cqe->itt & ISCSI_CMD_RESPONSE_INDEX);
a878185c 1919 if (!task || !task->sc) {
659743b0 1920 spin_unlock(&session->back_lock);
b5cf6b63
EW		 1921 return -EINVAL;
1922 }
1923 sc = task->sc;
b5cf6b63 1924
0d83ab65
EW		 1925 if (!blk_rq_cpu_valid(sc->request))
1926 cpu = smp_processor_id();
1927 else
1928 cpu = sc->request->cpu;
1929
659743b0 1930 spin_unlock(&session->back_lock);
a878185c 1931
0d83ab65 1932 p = &per_cpu(bnx2i_percpu, cpu);
b5cf6b63
EW		 1933 spin_lock(&p->p_work_lock);
1934 if (unlikely(!p->iothread)) {
1935 rc = -EINVAL;
1936 goto err;
1937 }
1938 /* Alloc and copy to the cqe */
1939 bnx2i_work = kzalloc(sizeof(struct bnx2i_work), GFP_ATOMIC);
1940 if (bnx2i_work) {
1941 INIT_LIST_HEAD(&bnx2i_work->list);
1942 bnx2i_work->session = session;
1943 bnx2i_work->bnx2i_conn = bnx2i_conn;
1944 memcpy(&bnx2i_work->cqe, cqe, sizeof(struct cqe));
1945 list_add_tail(&bnx2i_work->list, &p->work_list);
1946 atomic_inc(&bnx2i_conn->work_cnt);
1947 wake_up_process(p->iothread);
1948 spin_unlock(&p->p_work_lock);
1949 goto done;
1950 } else
1951 rc = -ENOMEM;
1952err:
1953 spin_unlock(&p->p_work_lock);
1954 bnx2i_process_scsi_cmd_resp(session, bnx2i_conn, (struct cqe *)cqe);
1955done:
1956 return rc;
1957}
1958
cf4e6363
MC		 1959
1960/**
1961 * bnx2i_process_new_cqes - process newly DMA'ed CQE's
b5cf6b63 1962 * @bnx2i_conn: bnx2i connection
cf4e6363
MC		 1963 *
1964 * this function is called by generic KCQ handler to process all pending CQE's
1965 */
b5cf6b63 1966static int bnx2i_process_new_cqes(struct bnx2i_conn *bnx2i_conn)
cf4e6363
MC		 1967{
1968 struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
1969 struct iscsi_session *session = conn->session;
2e499d3c 1970 struct bnx2i_hba *hba = bnx2i_conn->hba;
b5cf6b63 1971 struct qp_info *qp;
cf4e6363
MC		 1972 struct bnx2i_nop_in_msg *nopin;
1973 int tgt_async_msg;
b5cf6b63 1974 int cqe_cnt = 0;
cf4e6363 1975
b5cf6b63
EW		 1976 if (bnx2i_conn->ep == NULL)
1977 return 0;
1978
1979 qp = &bnx2i_conn->ep->qp;
1980
1981 if (!qp->cq_virt) {
1982 printk(KERN_ALERT "bnx2i (%s): cq resr freed in bh execution!",
2e499d3c 1983 hba->netdev->name);
b5cf6b63
EW		 1984 goto out;
1985 }
cf4e6363
MC		 1986 while (1) {
1987 nopin = (struct bnx2i_nop_in_msg *) qp->cq_cons_qe;
1988 if (nopin->cq_req_sn != qp->cqe_exp_seq_sn)
1989 break;
1990
5ee32576
EW		 1991 if (unlikely(test_bit(ISCSI_SUSPEND_BIT, &conn->suspend_rx))) {
1992 if (nopin->op_code == ISCSI_OP_NOOP_IN &&
1993 nopin->itt == (u16) RESERVED_ITT) {
1994 printk(KERN_ALERT "bnx2i: Unsolicited "
2e499d3c
BW		 1995 "NOP-In detected for suspended "
1996 "connection dev=%s!\n",
1997 hba->netdev->name);
5ee32576
EW		 1998 bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
1999 goto cqe_out;
2000 }
cf4e6363 2001 break;
5ee32576 2002 }
cf4e6363
MC		 2003 tgt_async_msg = 0;
2004
2005 switch (nopin->op_code) {
2006 case ISCSI_OP_SCSI_CMD_RSP:
2007 case ISCSI_OP_SCSI_DATA_IN:
b5cf6b63
EW		 2008 /* Run the kthread engine only for data cmds
2009 All other cmds will be completed in this bh! */
2010 bnx2i_queue_scsi_cmd_resp(session, bnx2i_conn, nopin);
2e499d3c 2011 goto done;
cf4e6363
MC		 2012 case ISCSI_OP_LOGIN_RSP:
2013 bnx2i_process_login_resp(session, bnx2i_conn,
2014 qp->cq_cons_qe);
2015 break;
2016 case ISCSI_OP_SCSI_TMFUNC_RSP:
2017 bnx2i_process_tmf_resp(session, bnx2i_conn,
2018 qp->cq_cons_qe);
09813ba5
EW		 2019 break;
2020 case ISCSI_OP_TEXT_RSP:
2021 bnx2i_process_text_resp(session, bnx2i_conn,
2022 qp->cq_cons_qe);
cf4e6363
MC		 2023 break;
2024 case ISCSI_OP_LOGOUT_RSP:
2025 bnx2i_process_logout_resp(session, bnx2i_conn,
2026 qp->cq_cons_qe);
2027 break;
2028 case ISCSI_OP_NOOP_IN:
2029 if (bnx2i_process_nopin_mesg(session, bnx2i_conn,
2030 qp->cq_cons_qe))
2031 tgt_async_msg = 1;
2032 break;
2033 case ISCSI_OPCODE_NOPOUT_LOCAL_COMPLETION:
2034 bnx2i_process_nopin_local_cmpl(session, bnx2i_conn,
2035 qp->cq_cons_qe);
2036 break;
2037 case ISCSI_OP_ASYNC_EVENT:
2038 bnx2i_process_async_mesg(session, bnx2i_conn,
2039 qp->cq_cons_qe);
2040 tgt_async_msg = 1;
2041 break;
2042 case ISCSI_OP_REJECT:
2043 bnx2i_process_reject_mesg(session, bnx2i_conn,
2044 qp->cq_cons_qe);
2045 break;
2046 case ISCSI_OPCODE_CLEANUP_RESPONSE:
2047 bnx2i_process_cmd_cleanup_resp(session, bnx2i_conn,
2048 qp->cq_cons_qe);
2049 break;
2050 default:
2051 printk(KERN_ALERT "bnx2i: unknown opcode 0x%x\n",
2052 nopin->op_code);
2053 }
2e499d3c
BW		 2054
2055 ADD_STATS_64(hba, rx_pdus, 1);
2056 ADD_STATS_64(hba, rx_bytes, nopin->data_length);
2057done:
b5cf6b63
EW		 2058 if (!tgt_async_msg) {
2059 if (!atomic_read(&bnx2i_conn->ep->num_active_cmds))
2060 printk(KERN_ALERT "bnx2i (%s): no active cmd! "
2061 "op 0x%x\n",
2e499d3c 2062 hba->netdev->name,
b5cf6b63
EW		 2063 nopin->op_code);
2064 else
2065 atomic_dec(&bnx2i_conn->ep->num_active_cmds);
2066 }
5ee32576 2067cqe_out:
cf4e6363
MC		 2068 /* clear out in production version only, till beta keep opcode
2069 * field intact, will be helpful in debugging (context dump)
2070 * nopin->op_code = 0;
2071 */
b5cf6b63 2072 cqe_cnt++;
cf4e6363
MC		 2073 qp->cqe_exp_seq_sn++;
2074 if (qp->cqe_exp_seq_sn == (qp->cqe_size * 2 + 1))
2075 qp->cqe_exp_seq_sn = ISCSI_INITIAL_SN;
2076
2077 if (qp->cq_cons_qe == qp->cq_last_qe) {
2078 qp->cq_cons_qe = qp->cq_first_qe;
2079 qp->cq_cons_idx = 0;
2080 } else {
2081 qp->cq_cons_qe++;
2082 qp->cq_cons_idx++;
2083 }
2084 }
b5cf6b63
EW		 2085out:
2086 return cqe_cnt;
cf4e6363
MC		 2087}
2088
2089/**
2090 * bnx2i_fastpath_notification - process global event queue (KCQ)
2091 * @hba: adapter structure pointer
2092 * @new_cqe_kcqe: pointer to newly DMA'ed KCQE entry
2093 *
2094 * Fast path event notification handler, KCQ entry carries context id
2095 * of the connection that has 1 or more pending CQ entries
2096 */
2097static void bnx2i_fastpath_notification(struct bnx2i_hba *hba,
2098 struct iscsi_kcqe *new_cqe_kcqe)
2099{
9ae58e14 2100 struct bnx2i_conn *bnx2i_conn;
cf4e6363 2101 u32 iscsi_cid;
b5cf6b63 2102 int nxt_idx;
cf4e6363
MC		 2103
2104 iscsi_cid = new_cqe_kcqe->iscsi_conn_id;
9ae58e14 2105 bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
cf4e6363 2106
9ae58e14 2107 if (!bnx2i_conn) {
cf4e6363
MC		 2108 printk(KERN_ALERT "cid #%x not valid\n", iscsi_cid);
2109 return;
2110 }
9ae58e14 2111 if (!bnx2i_conn->ep) {
cf4e6363
MC		 2112 printk(KERN_ALERT "cid #%x - ep not bound\n", iscsi_cid);
2113 return;
2114 }
b5cf6b63 2115
9ae58e14 2116 bnx2i_process_new_cqes(bnx2i_conn);
b5cf6b63
EW		 2117 nxt_idx = bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep,
2118 CNIC_ARM_CQE_FP);
2119 if (nxt_idx && nxt_idx == bnx2i_process_new_cqes(bnx2i_conn))
2120 bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep, CNIC_ARM_CQE_FP);
cf4e6363
MC		 2121}
2122
2123
2124/**
2125 * bnx2i_process_update_conn_cmpl - process iscsi conn update completion KCQE
2126 * @hba: adapter structure pointer
2127 * @update_kcqe: kcqe pointer
2128 *
2129 * CONN_UPDATE completion handler, this completes iSCSI connection FFP migration
2130 */
2131static void bnx2i_process_update_conn_cmpl(struct bnx2i_hba *hba,
2132 struct iscsi_kcqe *update_kcqe)
2133{
2134 struct bnx2i_conn *conn;
2135 u32 iscsi_cid;
2136
2137 iscsi_cid = update_kcqe->iscsi_conn_id;
2138 conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
2139
2140 if (!conn) {
2141 printk(KERN_ALERT "conn_update: cid %x not valid\n", iscsi_cid);
2142 return;
2143 }
2144 if (!conn->ep) {
2145 printk(KERN_ALERT "cid %x does not have ep bound\n", iscsi_cid);
2146 return;
2147 }
2148
2149 if (update_kcqe->completion_status) {
2150 printk(KERN_ALERT "request failed cid %x\n", iscsi_cid);
2151 conn->ep->state = EP_STATE_ULP_UPDATE_FAILED;
2152 } else
2153 conn->ep->state = EP_STATE_ULP_UPDATE_COMPL;
2154
2155 wake_up_interruptible(&conn->ep->ofld_wait);
2156}
2157
2158
2159/**
2160 * bnx2i_recovery_que_add_conn - add connection to recovery queue
2161 * @hba: adapter structure pointer
2162 * @bnx2i_conn: iscsi connection
2163 *
2164 * Add connection to recovery queue and schedule adapter eh worker
2165 */
2166static void bnx2i_recovery_que_add_conn(struct bnx2i_hba *hba,
2167 struct bnx2i_conn *bnx2i_conn)
2168{
2169 iscsi_conn_failure(bnx2i_conn->cls_conn->dd_data,
2170 ISCSI_ERR_CONN_FAILED);
2171}
2172
2173
2174/**
2175 * bnx2i_process_tcp_error - process error notification on a given connection
2176 *
2177 * @hba: adapter structure pointer
2178 * @tcp_err: tcp error kcqe pointer
2179 *
2180 * handles tcp level error notifications from FW.
2181 */
2182static void bnx2i_process_tcp_error(struct bnx2i_hba *hba,
2183 struct iscsi_kcqe *tcp_err)
2184{
2185 struct bnx2i_conn *bnx2i_conn;
2186 u32 iscsi_cid;
2187
2188 iscsi_cid = tcp_err->iscsi_conn_id;
2189 bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
2190
2191 if (!bnx2i_conn) {
2192 printk(KERN_ALERT "bnx2i - cid 0x%x not valid\n", iscsi_cid);
2193 return;
2194 }
2195
2196 printk(KERN_ALERT "bnx2i - cid 0x%x had TCP errors, error code 0x%x\n",
2197 iscsi_cid, tcp_err->completion_status);
2198 bnx2i_recovery_que_add_conn(bnx2i_conn->hba, bnx2i_conn);
2199}
2200
2201
2202/**
2203 * bnx2i_process_iscsi_error - process error notification on a given connection
2204 * @hba: adapter structure pointer
2205 * @iscsi_err: iscsi error kcqe pointer
2206 *
2207 * handles iscsi error notifications from the FW. Firmware based in initial
2208 * handshake classifies iscsi protocol / TCP rfc violation into either
2209 * warning or error indications. If indication is of "Error" type, driver
2210 * will initiate session recovery for that connection/session. For
2211 * "Warning" type indication, driver will put out a system log message
2212 * (there will be only one message for each type for the life of the
2213 * session, this is to avoid un-necessarily overloading the system)
2214 */
2215static void bnx2i_process_iscsi_error(struct bnx2i_hba *hba,
2216 struct iscsi_kcqe *iscsi_err)
2217{
2218 struct bnx2i_conn *bnx2i_conn;
2219 u32 iscsi_cid;
2220 char warn_notice[] = "iscsi_warning";
2221 char error_notice[] = "iscsi_error";
2222 char additional_notice[64];
2223 char *message;
2224 int need_recovery;
2225 u64 err_mask64;
2226
2227 iscsi_cid = iscsi_err->iscsi_conn_id;
2228 bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
2229 if (!bnx2i_conn) {
2230 printk(KERN_ALERT "bnx2i - cid 0x%x not valid\n", iscsi_cid);
2231 return;
2232 }
2233
2234 err_mask64 = (0x1ULL << iscsi_err->completion_status);
2235
2236 if (err_mask64 & iscsi_error_mask) {
2237 need_recovery = 0;
2238 message = warn_notice;
2239 } else {
2240 need_recovery = 1;
2241 message = error_notice;
2242 }
2243
2244 switch (iscsi_err->completion_status) {
2245 case ISCSI_KCQE_COMPLETION_STATUS_HDR_DIG_ERR:
2246 strcpy(additional_notice, "hdr digest err");
2247 break;
2248 case ISCSI_KCQE_COMPLETION_STATUS_DATA_DIG_ERR:
2249 strcpy(additional_notice, "data digest err");
2250 break;
2251 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_OPCODE:
2252 strcpy(additional_notice, "wrong opcode rcvd");
2253 break;
2254 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_AHS_LEN:
2255 strcpy(additional_notice, "AHS len > 0 rcvd");
2256 break;
2257 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_ITT:
2258 strcpy(additional_notice, "invalid ITT rcvd");
2259 break;
2260 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_STATSN:
2261 strcpy(additional_notice, "wrong StatSN rcvd");
2262 break;
2263 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_EXP_DATASN:
2264 strcpy(additional_notice, "wrong DataSN rcvd");
2265 break;
2266 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T:
2267 strcpy(additional_notice, "pend R2T violation");
2268 break;
2269 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_0:
2270 strcpy(additional_notice, "ERL0, UO");
2271 break;
2272 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_1:
2273 strcpy(additional_notice, "ERL0, U1");
2274 break;
2275 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_2:
2276 strcpy(additional_notice, "ERL0, U2");
2277 break;
2278 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_3:
2279 strcpy(additional_notice, "ERL0, U3");
2280 break;
2281 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_4:
2282 strcpy(additional_notice, "ERL0, U4");
2283 break;
2284 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_5:
2285 strcpy(additional_notice, "ERL0, U5");
2286 break;
2287 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_6:
2288 strcpy(additional_notice, "ERL0, U6");
2289 break;
2290 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REMAIN_RCV_LEN:
2291 strcpy(additional_notice, "invalid resi len");
2292 break;
2293 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_MAX_RCV_PDU_LEN:
2294 strcpy(additional_notice, "MRDSL violation");
2295 break;
2296 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_F_BIT_ZERO:
2297 strcpy(additional_notice, "F-bit not set");
2298 break;
2299 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_NOT_RSRV:
2300 strcpy(additional_notice, "invalid TTT");
2301 break;
2302 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DATASN:
2303 strcpy(additional_notice, "invalid DataSN");
2304 break;
2305 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REMAIN_BURST_LEN:
2306 strcpy(additional_notice, "burst len violation");
2307 break;
2308 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_BUFFER_OFF:
2309 strcpy(additional_notice, "buf offset violation");
2310 break;
2311 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_LUN:
2312 strcpy(additional_notice, "invalid LUN field");
2313 break;
2314 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_R2TSN:
2315 strcpy(additional_notice, "invalid R2TSN field");
2316 break;
2317#define BNX2I_ERR_DESIRED_DATA_TRNS_LEN_0 \
2318 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_0
2319 case BNX2I_ERR_DESIRED_DATA_TRNS_LEN_0:
2320 strcpy(additional_notice, "invalid cmd len1");
2321 break;
2322#define BNX2I_ERR_DESIRED_DATA_TRNS_LEN_1 \
2323 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_1
2324 case BNX2I_ERR_DESIRED_DATA_TRNS_LEN_1:
2325 strcpy(additional_notice, "invalid cmd len2");
2326 break;
2327 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T_EXCEED:
2328 strcpy(additional_notice,
2329 "pend r2t exceeds MaxOutstandingR2T value");
2330 break;
2331 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_IS_RSRV:
2332 strcpy(additional_notice, "TTT is rsvd");
2333 break;
2334 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_MAX_BURST_LEN:
2335 strcpy(additional_notice, "MBL violation");
2336 break;
2337#define BNX2I_ERR_DATA_SEG_LEN_NOT_ZERO \
2338 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DATA_SEG_LEN_NOT_ZERO
2339 case BNX2I_ERR_DATA_SEG_LEN_NOT_ZERO:
2340 strcpy(additional_notice, "data seg len != 0");
2341 break;
2342 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REJECT_PDU_LEN:
2343 strcpy(additional_notice, "reject pdu len error");
2344 break;
2345 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_ASYNC_PDU_LEN:
2346 strcpy(additional_notice, "async pdu len error");
2347 break;
2348 case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_NOPIN_PDU_LEN:
2349 strcpy(additional_notice, "nopin pdu len error");
2350 break;
2351#define BNX2_ERR_PEND_R2T_IN_CLEANUP \
2352 ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T_IN_CLEANUP
2353 case BNX2_ERR_PEND_R2T_IN_CLEANUP:
2354 strcpy(additional_notice, "pend r2t in cleanup");
2355 break;
2356
2357 case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_IP_FRAGMENT:
2358 strcpy(additional_notice, "IP fragments rcvd");
2359 break;
2360 case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_IP_OPTIONS:
2361 strcpy(additional_notice, "IP options error");
2362 break;
2363 case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_URGENT_FLAG:
2364 strcpy(additional_notice, "urgent flag error");
2365 break;
2366 default:
2367 printk(KERN_ALERT "iscsi_err - unknown err %x\n",
2368 iscsi_err->completion_status);
2369 }
2370
2371 if (need_recovery) {
2372 iscsi_conn_printk(KERN_ALERT,
2373 bnx2i_conn->cls_conn->dd_data,
2374 "bnx2i: %s - %s\n",
2375 message, additional_notice);
2376
2377 iscsi_conn_printk(KERN_ALERT,
2378 bnx2i_conn->cls_conn->dd_data,
2379 "conn_err - hostno %d conn %p, "
2380 "iscsi_cid %x cid %x\n",
2381 bnx2i_conn->hba->shost->host_no,
2382 bnx2i_conn, bnx2i_conn->ep->ep_iscsi_cid,
2383 bnx2i_conn->ep->ep_cid);
2384 bnx2i_recovery_que_add_conn(bnx2i_conn->hba, bnx2i_conn);
2385 } else
2386 if (!test_and_set_bit(iscsi_err->completion_status,
2387 (void *) &bnx2i_conn->violation_notified))
2388 iscsi_conn_printk(KERN_ALERT,
2389 bnx2i_conn->cls_conn->dd_data,
2390 "bnx2i: %s - %s\n",
2391 message, additional_notice);
2392}
2393
2394
2395/**
2396 * bnx2i_process_conn_destroy_cmpl - process iscsi conn destroy completion
2397 * @hba: adapter structure pointer
2398 * @conn_destroy: conn destroy kcqe pointer
2399 *
2400 * handles connection destroy completion request.
2401 */
2402static void bnx2i_process_conn_destroy_cmpl(struct bnx2i_hba *hba,
2403 struct iscsi_kcqe *conn_destroy)
2404{
2405 struct bnx2i_endpoint *ep;
2406
2407 ep = bnx2i_find_ep_in_destroy_list(hba, conn_destroy->iscsi_conn_id);
2408 if (!ep) {
2409 printk(KERN_ALERT "bnx2i_conn_destroy_cmpl: no pending "
09d2a4e7 2410 "offload request, unexpected completion\n");
cf4e6363
MC		 2411 return;
2412 }
2413
2414 if (hba != ep->hba) {
2415 printk(KERN_ALERT "conn destroy- error hba mis-match\n");
2416 return;
2417 }
2418
2419 if (conn_destroy->completion_status) {
2420 printk(KERN_ALERT "conn_destroy_cmpl: op failed\n");
2421 ep->state = EP_STATE_CLEANUP_FAILED;
2422 } else
2423 ep->state = EP_STATE_CLEANUP_CMPL;
2424 wake_up_interruptible(&ep->ofld_wait);
2425}
2426
2427
2428/**
2429 * bnx2i_process_ofld_cmpl - process initial iscsi conn offload completion
2430 * @hba: adapter structure pointer
2431 * @ofld_kcqe: conn offload kcqe pointer
2432 *
2433 * handles initial connection offload completion, ep_connect() thread is
2434 * woken-up to continue with LLP connect process
2435 */
2436static void bnx2i_process_ofld_cmpl(struct bnx2i_hba *hba,
2437 struct iscsi_kcqe *ofld_kcqe)
2438{
2439 u32 cid_addr;
2440 struct bnx2i_endpoint *ep;
2441 u32 cid_num;
2442
2443 ep = bnx2i_find_ep_in_ofld_list(hba, ofld_kcqe->iscsi_conn_id);
2444 if (!ep) {
2445 printk(KERN_ALERT "ofld_cmpl: no pend offload request\n");
2446 return;
2447 }
2448
2449 if (hba != ep->hba) {
2450 printk(KERN_ALERT "ofld_cmpl: error hba mis-match\n");
2451 return;
2452 }
2453
2454 if (ofld_kcqe->completion_status) {
bee34877 2455 ep->state = EP_STATE_OFLD_FAILED;
cf4e6363
MC		 2456 if (ofld_kcqe->completion_status ==
2457 ISCSI_KCQE_COMPLETION_STATUS_CTX_ALLOC_FAILURE)
bee34877
EW		 2458 printk(KERN_ALERT "bnx2i (%s): ofld1 cmpl - unable "
2459 "to allocate iSCSI context resources\n",
2460 hba->netdev->name);
2461 else if (ofld_kcqe->completion_status ==
2462 ISCSI_KCQE_COMPLETION_STATUS_INVALID_OPCODE)
2463 printk(KERN_ALERT "bnx2i (%s): ofld1 cmpl - invalid "
2464 "opcode\n", hba->netdev->name);
2465 else if (ofld_kcqe->completion_status ==
b5cf6b63 2466 ISCSI_KCQE_COMPLETION_STATUS_CID_BUSY)
bee34877
EW		 2467 /* error status code valid only for 5771x chipset */
2468 ep->state = EP_STATE_OFLD_FAILED_CID_BUSY;
2469 else
2470 printk(KERN_ALERT "bnx2i (%s): ofld1 cmpl - invalid "
2471 "error code %d\n", hba->netdev->name,
2472 ofld_kcqe->completion_status);
cf4e6363
MC		 2473 } else {
2474 ep->state = EP_STATE_OFLD_COMPL;
2475 cid_addr = ofld_kcqe->iscsi_conn_context_id;
2476 cid_num = bnx2i_get_cid_num(ep);
2477 ep->ep_cid = cid_addr;
2478 ep->qp.ctx_base = NULL;
2479 }
2480 wake_up_interruptible(&ep->ofld_wait);
2481}
2482
2483/**
2484 * bnx2i_indicate_kcqe - process iscsi conn update completion KCQE
2485 * @hba: adapter structure pointer
2486 * @update_kcqe: kcqe pointer
2487 *
2488 * Generic KCQ event handler/dispatcher
2489 */
2490static void bnx2i_indicate_kcqe(void *context, struct kcqe *kcqe[],
2491 u32 num_cqe)
2492{
2493 struct bnx2i_hba *hba = context;
2494 int i = 0;
2495 struct iscsi_kcqe *ikcqe = NULL;
2496
2497 while (i < num_cqe) {
2498 ikcqe = (struct iscsi_kcqe *) kcqe[i++];
2499
2500 if (ikcqe->op_code ==
2501 ISCSI_KCQE_OPCODE_CQ_EVENT_NOTIFICATION)
2502 bnx2i_fastpath_notification(hba, ikcqe);
2503 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_OFFLOAD_CONN)
2504 bnx2i_process_ofld_cmpl(hba, ikcqe);
2505 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_UPDATE_CONN)
2506 bnx2i_process_update_conn_cmpl(hba, ikcqe);
2507 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_INIT) {
2508 if (ikcqe->completion_status !=
2509 ISCSI_KCQE_COMPLETION_STATUS_SUCCESS)
2510 bnx2i_iscsi_license_error(hba, ikcqe->\
2511 completion_status);
2512 else {
2513 set_bit(ADAPTER_STATE_UP, &hba->adapter_state);
2514 bnx2i_get_link_state(hba);
2515 printk(KERN_INFO "bnx2i [%.2x:%.2x.%.2x]: "
2516 "ISCSI_INIT passed\n",
2517 (u8)hba->pcidev->bus->number,
2518 hba->pci_devno,
2519 (u8)hba->pci_func);
2520
2521
2522 }
2523 } else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_DESTROY_CONN)
2524 bnx2i_process_conn_destroy_cmpl(hba, ikcqe);
2525 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_ISCSI_ERROR)
2526 bnx2i_process_iscsi_error(hba, ikcqe);
2527 else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_TCP_ERROR)
2528 bnx2i_process_tcp_error(hba, ikcqe);
2529 else
2530 printk(KERN_ALERT "bnx2i: unknown opcode 0x%x\n",
2531 ikcqe->op_code);
2532 }
2533}
2534
2535
2536/**
2537 * bnx2i_indicate_netevent - Generic netdev event handler
2538 * @context: adapter structure pointer
2539 * @event: event type
415199f2 2540 * @vlan_id: vlans id - associated vlan id with this event
cf4e6363
MC		 2541 *
2542 * Handles four netdev events, NETDEV_UP, NETDEV_DOWN,
2543 * NETDEV_GOING_DOWN and NETDEV_CHANGE
2544 */
415199f2
MC		 2545static void bnx2i_indicate_netevent(void *context, unsigned long event,
2546 u16 vlan_id)
cf4e6363
MC		 2547{
2548 struct bnx2i_hba *hba = context;
2549
415199f2
MC		 2550 /* Ignore all netevent coming from vlans */
2551 if (vlan_id != 0)
2552 return;
2553
cf4e6363
MC		 2554 switch (event) {
2555 case NETDEV_UP:
2556 if (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state))
2557 bnx2i_send_fw_iscsi_init_msg(hba);
2558 break;
2559 case NETDEV_DOWN:
2560 clear_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state);
2561 clear_bit(ADAPTER_STATE_UP, &hba->adapter_state);
2562 break;
2563 case NETDEV_GOING_DOWN:
2564 set_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state);
2565 iscsi_host_for_each_session(hba->shost,
2566 bnx2i_drop_session);
2567 break;
2568 case NETDEV_CHANGE:
2569 bnx2i_get_link_state(hba);
2570 break;
2571 default:
2572 ;
2573 }
2574}
2575
2576
2577/**
2578 * bnx2i_cm_connect_cmpl - process iscsi conn establishment completion
2579 * @cm_sk: cnic sock structure pointer
2580 *
2581 * function callback exported via bnx2i - cnic driver interface to
2582 * indicate completion of option-2 TCP connect request.
2583 */
2584static void bnx2i_cm_connect_cmpl(struct cnic_sock *cm_sk)
2585{
2586 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2587
2588 if (test_bit(ADAPTER_STATE_GOING_DOWN, &ep->hba->adapter_state))
2589 ep->state = EP_STATE_CONNECT_FAILED;
2590 else if (test_bit(SK_F_OFFLD_COMPLETE, &cm_sk->flags))
2591 ep->state = EP_STATE_CONNECT_COMPL;
2592 else
2593 ep->state = EP_STATE_CONNECT_FAILED;
2594
2595 wake_up_interruptible(&ep->ofld_wait);
2596}
2597
2598
2599/**
2600 * bnx2i_cm_close_cmpl - process tcp conn close completion
2601 * @cm_sk: cnic sock structure pointer
2602 *
2603 * function callback exported via bnx2i - cnic driver interface to
2604 * indicate completion of option-2 graceful TCP connect shutdown
2605 */
2606static void bnx2i_cm_close_cmpl(struct cnic_sock *cm_sk)
2607{
2608 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2609
2610 ep->state = EP_STATE_DISCONN_COMPL;
2611 wake_up_interruptible(&ep->ofld_wait);
2612}
2613
2614
2615/**
2616 * bnx2i_cm_abort_cmpl - process abortive tcp conn teardown completion
2617 * @cm_sk: cnic sock structure pointer
2618 *
2619 * function callback exported via bnx2i - cnic driver interface to
2620 * indicate completion of option-2 abortive TCP connect termination
2621 */
2622static void bnx2i_cm_abort_cmpl(struct cnic_sock *cm_sk)
2623{
2624 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2625
2626 ep->state = EP_STATE_DISCONN_COMPL;
2627 wake_up_interruptible(&ep->ofld_wait);
2628}
2629
2630
2631/**
2632 * bnx2i_cm_remote_close - process received TCP FIN
2633 * @hba: adapter structure pointer
2634 * @update_kcqe: kcqe pointer
2635 *
2636 * function callback exported via bnx2i - cnic driver interface to indicate
2637 * async TCP events such as FIN
2638 */
2639static void bnx2i_cm_remote_close(struct cnic_sock *cm_sk)
2640{
2641 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
2642
2643 ep->state = EP_STATE_TCP_FIN_RCVD;
2644 if (ep->conn)
2645 bnx2i_recovery_que_add_conn(ep->hba, ep->conn);
2646}
2647
2648/**
2649 * bnx2i_cm_remote_abort - process TCP RST and start conn cleanup
2650 * @hba: adapter structure pointer
2651 * @update_kcqe: kcqe pointer
2652 *
2653 * function callback exported via bnx2i - cnic driver interface to
2654 * indicate async TCP events (RST) sent by the peer.
2655 */
2656static void bnx2i_cm_remote_abort(struct cnic_sock *cm_sk)
2657{
2658 struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
94810e82 2659 u32 old_state = ep->state;
cf4e6363
MC		 2660
2661 ep->state = EP_STATE_TCP_RST_RCVD;
94810e82
EW		 2662 if (old_state == EP_STATE_DISCONN_START)
2663 wake_up_interruptible(&ep->ofld_wait);
2664 else
2665 if (ep->conn)
2666 bnx2i_recovery_que_add_conn(ep->hba, ep->conn);
cf4e6363
MC		 2667}
2668
2669
939b82e5 2670static int bnx2i_send_nl_mesg(void *context, u32 msg_type,
b5cf6b63 2671 char *buf, u16 buflen)
cf4e6363 2672{
939b82e5
MC		 2673 struct bnx2i_hba *hba = context;
2674 int rc;
cf4e6363 2675
cf4e6363 2676 if (!hba)
939b82e5 2677 return -ENODEV;
cf4e6363 2678
939b82e5
MC		 2679 rc = iscsi_offload_mesg(hba->shost, &bnx2i_iscsi_transport,
2680 msg_type, buf, buflen);
2681 if (rc)
cf4e6363
MC		 2682 printk(KERN_ALERT "bnx2i: private nl message send error\n");
2683
939b82e5 2684 return rc;
cf4e6363
MC		 2685}
2686
2687
2688/**
2689 * bnx2i_cnic_cb - global template of bnx2i - cnic driver interface structure
2690 * carrying callback function pointers
2691 *
2692 */
2693struct cnic_ulp_ops bnx2i_cnic_cb = {
2694 .cnic_init = bnx2i_ulp_init,
2695 .cnic_exit = bnx2i_ulp_exit,
2696 .cnic_start = bnx2i_start,
2697 .cnic_stop = bnx2i_stop,
2698 .indicate_kcqes = bnx2i_indicate_kcqe,
2699 .indicate_netevent = bnx2i_indicate_netevent,
2700 .cm_connect_complete = bnx2i_cm_connect_cmpl,
2701 .cm_close_complete = bnx2i_cm_close_cmpl,
2702 .cm_abort_complete = bnx2i_cm_abort_cmpl,
2703 .cm_remote_close = bnx2i_cm_remote_close,
2704 .cm_remote_abort = bnx2i_cm_remote_abort,
2705 .iscsi_nl_send_msg = bnx2i_send_nl_mesg,
2e499d3c 2706 .cnic_get_stats = bnx2i_get_stats,
cf4e6363
MC		 2707 .owner = THIS_MODULE
2708};
2709
2710
2711/**
2712 * bnx2i_map_ep_dbell_regs - map connection doorbell registers
2713 * @ep: bnx2i endpoint
2714 *
2715 * maps connection's SQ and RQ doorbell registers, 5706/5708/5709 hosts these
2716 * register in BAR #0. Whereas in 57710 these register are accessed by
2717 * mapping BAR #1
2718 */
2719int bnx2i_map_ep_dbell_regs(struct bnx2i_endpoint *ep)
2720{
2721 u32 cid_num;
2722 u32 reg_off;
2723 u32 first_l4l5;
2724 u32 ctx_sz;
2725 u32 config2;
2726 resource_size_t reg_base;
2727
2728 cid_num = bnx2i_get_cid_num(ep);
2729
2730 if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
2731 reg_base = pci_resource_start(ep->hba->pcidev,
2732 BNX2X_DOORBELL_PCI_BAR);
f78afb35 2733 reg_off = (1 << BNX2X_DB_SHIFT) * (cid_num & 0x1FFFF);
cf4e6363 2734 ep->qp.ctx_base = ioremap_nocache(reg_base + reg_off, 4);
55d637d7
ZJ		 2735 if (!ep->qp.ctx_base)
2736 return -ENOMEM;
cf4e6363
MC		 2737 goto arm_cq;
2738 }
2739
cf4e6363
MC		 2740 if ((test_bit(BNX2I_NX2_DEV_5709, &ep->hba->cnic_dev_type)) &&
2741 (ep->hba->mail_queue_access == BNX2I_MQ_BIN_MODE)) {
2742 config2 = REG_RD(ep->hba, BNX2_MQ_CONFIG2);
2743 first_l4l5 = config2 & BNX2_MQ_CONFIG2_FIRST_L4L5;
2744 ctx_sz = (config2 & BNX2_MQ_CONFIG2_CONT_SZ) >> 3;
2745 if (ctx_sz)
2746 reg_off = CTX_OFFSET + MAX_CID_CNT * MB_KERNEL_CTX_SIZE
53203244 2747 + BNX2I_570X_PAGE_SIZE_DEFAULT *
cf4e6363
MC		 2748 (((cid_num - first_l4l5) / ctx_sz) + 256);
2749 else
2750 reg_off = CTX_OFFSET + (MB_KERNEL_CTX_SIZE * cid_num);
2751 } else
2752 /* 5709 device in normal node and 5706/5708 devices */
2753 reg_off = CTX_OFFSET + (MB_KERNEL_CTX_SIZE * cid_num);
2754
a7717180 2755 ep->qp.ctx_base = ioremap_nocache(ep->hba->reg_base + reg_off,
cf4e6363
MC		 2756 MB_KERNEL_CTX_SIZE);
2757 if (!ep->qp.ctx_base)
2758 return -ENOMEM;
2759
2760arm_cq:
2761 bnx2i_arm_cq_event_coalescing(ep, CNIC_ARM_CQE);
2762 return 0;
2763}
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