summaryrefslogtreecommitdiffstats
path: root/drivers/net/qlge/qlge_mpi.c
blob: c2e43073047eabfa58b40945de95e7d5c7c944cb (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
#include "qlge.h"

static void ql_display_mb_sts(struct ql_adapter *qdev,
						struct mbox_params *mbcp)
{
	int i;
	static char *err_sts[] = {
		"Command Complete",
		"Command Not Supported",
		"Host Interface Error",
		"Checksum Error",
		"Unused Completion Status",
		"Test Failed",
		"Command Parameter Error"};

	QPRINTK(qdev, DRV, DEBUG, "%s.\n",
		err_sts[mbcp->mbox_out[0] & 0x0000000f]);
	for (i = 0; i < mbcp->out_count; i++)
		QPRINTK(qdev, DRV, DEBUG, "mbox_out[%d] = 0x%.08x.\n",
				i, mbcp->mbox_out[i]);
}

int ql_read_mpi_reg(struct ql_adapter *qdev, u32 reg, u32 *data)
{
	int status;
	/* wait for reg to come ready */
	status = ql_wait_reg_rdy(qdev, PROC_ADDR, PROC_ADDR_RDY, PROC_ADDR_ERR);
	if (status)
		goto exit;
	/* set up for reg read */
	ql_write32(qdev, PROC_ADDR, reg | PROC_ADDR_R);
	/* wait for reg to come ready */
	status = ql_wait_reg_rdy(qdev, PROC_ADDR, PROC_ADDR_RDY, PROC_ADDR_ERR);
	if (status)
		goto exit;
	/* get the data */
	*data = ql_read32(qdev, PROC_DATA);
exit:
	return status;
}

int ql_write_mpi_reg(struct ql_adapter *qdev, u32 reg, u32 data)
{
	int status = 0;
	/* wait for reg to come ready */
	status = ql_wait_reg_rdy(qdev, PROC_ADDR, PROC_ADDR_RDY, PROC_ADDR_ERR);
	if (status)
		goto exit;
	/* write the data to the data reg */
	ql_write32(qdev, PROC_DATA, data);
	/* trigger the write */
	ql_write32(qdev, PROC_ADDR, reg);
	/* wait for reg to come ready */
	status = ql_wait_reg_rdy(qdev, PROC_ADDR, PROC_ADDR_RDY, PROC_ADDR_ERR);
	if (status)
		goto exit;
exit:
	return status;
}

int ql_soft_reset_mpi_risc(struct ql_adapter *qdev)
{
	int status;
	status = ql_write_mpi_reg(qdev, 0x00001010, 1);
	return status;
}

static int ql_get_mb_sts(struct ql_adapter *qdev, struct mbox_params *mbcp)
{
	int i, status;

	status = ql_sem_spinlock(qdev, SEM_PROC_REG_MASK);
	if (status)
		return -EBUSY;
	for (i = 0; i < mbcp->out_count; i++) {
		status =
		    ql_read_mpi_reg(qdev, qdev->mailbox_out + i,
				     &mbcp->mbox_out[i]);
		if (status) {
			QPRINTK(qdev, DRV, ERR, "Failed mailbox read.\n");
			break;
		}
	}
	ql_sem_unlock(qdev, SEM_PROC_REG_MASK);	/* does flush too */
	return status;
}

/* Wait for a single mailbox command to complete.
 * Returns zero on success.
 */
static int ql_wait_mbx_cmd_cmplt(struct ql_adapter *qdev)
{
	int count = 100;
	u32 value;

	do {
		value = ql_read32(qdev, STS);
		if (value & STS_PI)
			return 0;
		mdelay(UDELAY_DELAY); /* 100ms */
	} while (--count);
	return -ETIMEDOUT;
}

/* Execute a single mailbox command.
 * Caller must hold PROC_ADDR semaphore.
 */
static int ql_exec_mb_cmd(struct ql_adapter *qdev, struct mbox_params *mbcp)
{
	int i, status;

	/*
	 * Make sure there's nothing pending.
	 * This shouldn't happen.
	 */
	if (ql_read32(qdev, CSR) & CSR_HRI)
		return -EIO;

	status = ql_sem_spinlock(qdev, SEM_PROC_REG_MASK);
	if (status)
		return status;

	/*
	 * Fill the outbound mailboxes.
	 */
	for (i = 0; i < mbcp->in_count; i++) {
		status = ql_write_mpi_reg(qdev, qdev->mailbox_in + i,
						mbcp->mbox_in[i]);
		if (status)
			goto end;
	}
	/*
	 * Wake up the MPI firmware.
	 */
	ql_write32(qdev, CSR, CSR_CMD_SET_H2R_INT);
end:
	ql_sem_unlock(qdev, SEM_PROC_REG_MASK);
	return status;
}

/* We are being asked by firmware to accept
 * a change to the port.  This is only
 * a change to max frame sizes (Tx/Rx), pause
 * parameters, or loopback mode. We wake up a worker
 * to handler processing this since a mailbox command
 * will need to be sent to ACK the request.
 */
static int ql_idc_req_aen(struct ql_adapter *qdev)
{
	int status;
	struct mbox_params *mbcp = &qdev->idc_mbc;

	QPRINTK(qdev, DRV, ERR, "Enter!\n");
	/* Get the status data and start up a thread to
	 * handle the request.
	 */
	mbcp = &qdev->idc_mbc;
	mbcp->out_count = 4;
	status = ql_get_mb_sts(qdev, mbcp);
	if (status) {
		QPRINTK(qdev, DRV, ERR,
			"Could not read MPI, resetting ASIC!\n");
		ql_queue_asic_error(qdev);
	} else	{
		/* Begin polled mode early so
		 * we don't get another interrupt
		 * when we leave mpi_worker.
		 */
		ql_write32(qdev, INTR_MASK, (INTR_MASK_PI << 16));
		queue_delayed_work(qdev->workqueue, &qdev->mpi_idc_work, 0);
	}
	return status;
}

/* Process an inter-device event completion.
 * If good, signal the caller's completion.
 */
static int ql_idc_cmplt_aen(struct ql_adapter *qdev)
{
	int status;
	struct mbox_params *mbcp = &qdev->idc_mbc;
	mbcp->out_count = 4;
	status = ql_get_mb_sts(qdev, mbcp);
	if (status) {
		QPRINTK(qdev, DRV, ERR,
			"Could not read MPI, resetting RISC!\n");
		ql_queue_fw_error(qdev);
	} else
		/* Wake up the sleeping mpi_idc_work thread that is
		 * waiting for this event.
		 */
		complete(&qdev->ide_completion);

	return status;
}

static void ql_link_up(struct ql_adapter *qdev, struct mbox_params *mbcp)
{
	int status;
	mbcp->out_count = 2;

	status = ql_get_mb_sts(qdev, mbcp);
	if (status) {
		QPRINTK(qdev, DRV, ERR,
			"%s: Could not get mailbox status.\n", __func__);
		return;
	}

	qdev->link_status = mbcp->mbox_out[1];
	QPRINTK(qdev, DRV, ERR, "Link Up.\n");

	/* If we're coming back from an IDC event
	 * then set up the CAM and frame routing.
	 */
	if (test_bit(QL_CAM_RT_SET, &qdev->flags)) {
		status = ql_cam_route_initialize(qdev);
		if (status) {
			QPRINTK(qdev, IFUP, ERR,
			"Failed to init CAM/Routing tables.\n");
			return;
		} else
			clear_bit(QL_CAM_RT_SET, &qdev->flags);
	}

	/* Queue up a worker to check the frame
	 * size information, and fix it if it's not
	 * to our liking.
	 */
	if (!test_bit(QL_PORT_CFG, &qdev->flags)) {
		QPRINTK(qdev, DRV, ERR, "Queue Port Config Worker!\n");
		set_bit(QL_PORT_CFG, &qdev->flags);
		/* Begin polled mode early so
		 * we don't get another interrupt
		 * when we leave mpi_worker dpc.
		 */
		ql_write32(qdev, INTR_MASK, (INTR_MASK_PI << 16));
		queue_delayed_work(qdev->workqueue,
				&qdev->mpi_port_cfg_work, 0);
	}

	ql_link_on(qdev);
}

static void ql_link_down(struct ql_adapter *qdev, struct mbox_params *mbcp)
{
	int status;

	mbcp->out_count = 3;

	status = ql_get_mb_sts(qdev, mbcp);
	if (status)
		QPRINTK(qdev, DRV, ERR, "Link down AEN broken!\n");

	ql_link_off(qdev);
}

static int ql_sfp_in(struct ql_adapter *qdev, struct mbox_params *mbcp)
{
	int status;

	mbcp->out_count = 5;

	status = ql_get_mb_sts(qdev, mbcp);
	if (status)
		QPRINTK(qdev, DRV, ERR, "SFP in AEN broken!\n");
	else
		QPRINTK(qdev, DRV, ERR, "SFP insertion detected.\n");

	return status;
}

static int ql_sfp_out(struct ql_adapter *qdev, struct mbox_params *mbcp)
{
	int status;

	mbcp->out_count = 1;

	status = ql_get_mb_sts(qdev, mbcp);
	if (status)
		QPRINTK(qdev, DRV, ERR, "SFP out AEN broken!\n");
	else
		QPRINTK(qdev, DRV, ERR, "SFP removal detected.\n");

	return status;
}

static int ql_aen_lost(struct ql_adapter *qdev, struct mbox_params *mbcp)
{
	int status;

	mbcp->out_count = 6;

	status = ql_get_mb_sts(qdev, mbcp);
	if (status)
		QPRINTK(qdev, DRV, ERR, "Lost AEN broken!\n");
	else {
		int i;
		QPRINTK(qdev, DRV, ERR, "Lost AEN detected.\n");
		for (i = 0; i < mbcp->out_count; i++)
			QPRINTK(qdev, DRV, ERR, "mbox_out[%d] = 0x%.08x.\n",
					i, mbcp->mbox_out[i]);

	}

	return status;
}

static void ql_init_fw_done(struct ql_adapter *qdev, struct mbox_params *mbcp)
{
	int status;

	mbcp->out_count = 2;

	status = ql_get_mb_sts(qdev, mbcp);
	if (status) {
		QPRINTK(qdev, DRV, ERR, "Firmware did not initialize!\n");
	} else {
		QPRINTK(qdev, DRV, ERR, "Firmware Revision  = 0x%.08x.\n",
			mbcp->mbox_out[1]);
		status = ql_cam_route_initialize(qdev);
		if (status)
			QPRINTK(qdev, IFUP, ERR,
				"Failed to init CAM/Routing tables.\n");
	}
}

/* Process an async event and clear it unless it's an
 * error condition.
 *  This can get called iteratively from the mpi_work thread
 *  when events arrive via an interrupt.
 *  It also gets called when a mailbox command is polling for
 *  it's completion. */
static int ql_mpi_handler(struct ql_adapter *qdev, struct mbox_params *mbcp)
{
	int status;
	int orig_count = mbcp->out_count;

	/* Just get mailbox zero for now. */
	mbcp->out_count = 1;
	status = ql_get_mb_sts(qdev, mbcp);
	if (status) {
		QPRINTK(qdev, DRV, ERR,
			"Could not read MPI, resetting ASIC!\n");
		ql_queue_asic_error(qdev);
		goto end;
	}

	switch (mbcp->mbox_out[0]) {

	/* This case is only active when we arrive here
	 * as a result of issuing a mailbox command to
	 * the firmware.
	 */
	case MB_CMD_STS_INTRMDT:
	case MB_CMD_STS_GOOD:
	case MB_CMD_STS_INVLD_CMD:
	case MB_CMD_STS_XFC_ERR:
	case MB_CMD_STS_CSUM_ERR:
	case MB_CMD_STS_ERR:
	case MB_CMD_STS_PARAM_ERR:
		/* We can only get mailbox status if we're polling from an
		 * unfinished command.  Get the rest of the status data and
		 * return back to the caller.
		 * We only end up here when we're polling for a mailbox
		 * command completion.
		 */
		mbcp->out_count = orig_count;
		status = ql_get_mb_sts(qdev, mbcp);
		return status;

	/* We are being asked by firmware to accept
	 * a change to the port.  This is only
	 * a change to max frame sizes (Tx/Rx), pause
	 * parameters, or loopback mode.
	 */
	case AEN_IDC_REQ:
		status = ql_idc_req_aen(qdev);
		break;

	/* Process and inbound IDC event.
	 * This will happen when we're trying to
	 * change tx/rx max frame size, change pause
	 * parameters or loopback mode.
	 */
	case AEN_IDC_CMPLT:
	case AEN_IDC_EXT:
		status = ql_idc_cmplt_aen(qdev);
		break;

	case AEN_LINK_UP:
		ql_link_up(qdev, mbcp);
		break;

	case AEN_LINK_DOWN:
		ql_link_down(qdev, mbcp);
		break;

	case AEN_FW_INIT_DONE:
		/* If we're in process on executing the firmware,
		 * then convert the status to normal mailbox status.
		 */
		if (mbcp->mbox_in[0] == MB_CMD_EX_FW) {
			mbcp->out_count = orig_count;
			status = ql_get_mb_sts(qdev, mbcp);
			mbcp->mbox_out[0] = MB_CMD_STS_GOOD;
			return status;
		}
		ql_init_fw_done(qdev, mbcp);
		break;

	case AEN_AEN_SFP_IN:
		ql_sfp_in(qdev, mbcp);
		break;

	case AEN_AEN_SFP_OUT:
		ql_sfp_out(qdev, mbcp);
		break;

	/* This event can arrive at boot time or after an
	 * MPI reset if the firmware failed to initialize.
	 */
	case AEN_FW_INIT_FAIL:
		/* If we're in process on executing the firmware,
		 * then convert the status to normal mailbox status.
		 */
		if (mbcp->mbox_in[0] == MB_CMD_EX_FW) {
			mbcp->out_count = orig_count;
			status = ql_get_mb_sts(qdev, mbcp);
			mbcp->mbox_out[0] = MB_CMD_STS_ERR;
			return status;
		}
		QPRINTK(qdev, DRV, ERR,
			"Firmware initialization failed.\n");
		status = -EIO;
		ql_queue_fw_error(qdev);
		break;

	case AEN_SYS_ERR:
		QPRINTK(qdev, DRV, ERR,
			"System Error.\n");
		ql_queue_fw_error(qdev);
		status = -EIO;
		break;

	case AEN_AEN_LOST:
		ql_aen_lost(qdev, mbcp);
		break;

	default:
		QPRINTK(qdev, DRV, ERR,
			"Unsupported AE %.08x.\n", mbcp->mbox_out[0]);
		/* Clear the MPI firmware status. */
	}
end:
	ql_write32(qdev, CSR, CSR_CMD_CLR_R2PCI_INT);
	/* Restore the original mailbox count to
	 * what the caller asked for.  This can get
	 * changed when a mailbox command is waiting
	 * for a response and an AEN arrives and
	 * is handled.
	 * */
	mbcp->out_count = orig_count;
	return status;
}

/* Execute a single mailbox command.
 * mbcp is a pointer to an array of u32.  Each
 * element in the array contains the value for it's
 * respective mailbox register.
 */
static int ql_mailbox_command(struct ql_adapter *qdev, struct mbox_params *mbcp)
{
	int status, count;


	/* Begin polled mode for MPI */
	ql_write32(qdev, INTR_MASK, (INTR_MASK_PI << 16));

	/* Load the mailbox registers and wake up MPI RISC. */
	status = ql_exec_mb_cmd(qdev, mbcp);
	if (status)
		goto end;


	/* If we're generating a system error, then there's nothing
	 * to wait for.
	 */
	if (mbcp->mbox_in[0] == MB_CMD_MAKE_SYS_ERR)
		goto end;

	/* Wait for the command to complete. We loop
	 * here because some AEN might arrive while
	 * we're waiting for the mailbox command to
	 * complete. If more than 5 arrive then we can
	 * assume something is wrong. */
	count = 5;
	do {
		/* Wait for the interrupt to come in. */
		status = ql_wait_mbx_cmd_cmplt(qdev);
		if (status)
			goto end;

		/* Process the event.  If it's an AEN, it
		 * will be handled in-line or a worker
		 * will be spawned. If it's our completion
		 * we will catch it below.
		 */
		status = ql_mpi_handler(qdev, mbcp);
		if (status)
			goto end;

		/* It's either the completion for our mailbox
		 * command complete or an AEN.  If it's our
		 * completion then get out.
		 */
		if (((mbcp->mbox_out[0] & 0x0000f000) ==
					MB_CMD_STS_GOOD) ||
			((mbcp->mbox_out[0] & 0x0000f000) ==
					MB_CMD_STS_INTRMDT))
			break;
	} while (--count);

	if (!count) {
		QPRINTK(qdev, DRV, ERR,
			"Timed out waiting for mailbox complete.\n");
		status = -ETIMEDOUT;
		goto end;
	}

	/* Now we can clear the interrupt condition
	 * and look at our status.
	 */
	ql_write32(qdev, CSR, CSR_CMD_CLR_R2PCI_INT);

	if (((mbcp->mbox_out[0] & 0x0000f000) !=
					MB_CMD_STS_GOOD) &&
		((mbcp->mbox_out[0] & 0x0000f000) !=
					MB_CMD_STS_INTRMDT)) {
		ql_display_mb_sts(qdev, mbcp);
		status = -EIO;
	}
end:
	/* End polled mode for MPI */
	ql_write32(qdev, INTR_MASK, (INTR_MASK_PI << 16) | INTR_MASK_PI);
	return status;
}


/* Get MPI firmware version. This will be used for
 * driver banner and for ethtool info.
 * Returns zero on success.
 */
int ql_mb_about_fw(struct ql_adapter *qdev)
{
	struct mbox_params mbc;
	struct mbox_params *mbcp = &mbc;
	int status = 0;

	memset(mbcp, 0, sizeof(struct mbox_params));

	mbcp->in_count = 1;
	mbcp->out_count = 3;

	mbcp->mbox_in[0] = MB_CMD_ABOUT_FW;

	status = ql_mailbox_command(qdev, mbcp);
	if (status)
		return status;

	if (mbcp->mbox_out[0] != MB_CMD_STS_GOOD) {
		QPRINTK(qdev, DRV, ERR,
			"Failed about firmware command\n");
		status = -EIO;
	}

	/* Store the firmware version */
	qdev->fw_rev_id = mbcp->mbox_out[1];

	return status;
}

/* Get functional state for MPI firmware.
 * Returns zero on success.
 */
int ql_mb_get_fw_state(struct ql_adapter *qdev)
{
	struct mbox_params mbc;
	struct mbox_params *mbcp = &mbc;
	int status = 0;

	memset(mbcp, 0, sizeof(struct mbox_params));

	mbcp->in_count = 1;
	mbcp->out_count = 2;

	mbcp->mbox_in[0] = MB_CMD_GET_FW_STATE;

	status = ql_mailbox_command(qdev, mbcp);
	if (status)
		return status;

	if (mbcp->mbox_out[0] != MB_CMD_STS_GOOD) {
		QPRINTK(qdev, DRV, ERR,
			"Failed Get Firmware State.\n");
		status = -EIO;
	}

	/* If bit zero is set in mbx 1 then the firmware is
	 * running, but not initialized.  This should never
	 * happen.
	 */
	if (mbcp->mbox_out[1] & 1) {
		QPRINTK(qdev, DRV, ERR,
			"Firmware waiting for initialization.\n");
		status = -EIO;
	}

	return status;
}

/* Send and ACK mailbox command to the firmware to
 * let it continue with the change.
 */
int ql_mb_idc_ack(struct ql_adapter *qdev)
{
	struct mbox_params mbc;
	struct mbox_params *mbcp = &mbc;
	int status = 0;

	memset(mbcp, 0, sizeof(struct mbox_params));

	mbcp->in_count = 5;
	mbcp->out_count = 1;

	mbcp->mbox_in[0] = MB_CMD_IDC_ACK;
	mbcp->mbox_in[1] = qdev->idc_mbc.mbox_out[1];
	mbcp->mbox_in[2] = qdev->idc_mbc.mbox_out[2];
	mbcp->mbox_in[3] = qdev->idc_mbc.mbox_out[3];
	mbcp->mbox_in[4] = qdev->idc_mbc.mbox_out[4];

	status = ql_mailbox_command(qdev, mbcp);
	if (status)
		return status;

	if (mbcp->mbox_out[0] != MB_CMD_STS_GOOD) {
		QPRINTK(qdev, DRV, ERR,
			"Failed IDC ACK send.\n");
		status = -EIO;
	}
	return status;
}

/* Get link settings and maximum frame size settings
 * for the current port.
 * Most likely will block.
 */
static int ql_mb_set_port_cfg(struct ql_adapter *qdev)
{
	struct mbox_params mbc;
	struct mbox_params *mbcp = &mbc;
	int status = 0;

	memset(mbcp, 0, sizeof(struct mbox_params));

	mbcp->in_count = 3;
	mbcp->out_count = 1;

	mbcp->mbox_in[0] = MB_CMD_SET_PORT_CFG;
	mbcp->mbox_in[1] = qdev->link_config;
	mbcp->mbox_in[2] = qdev->max_frame_size;


	status = ql_mailbox_command(qdev, mbcp);
	if (status)
		return status;

	if (mbcp->mbox_out[0] == MB_CMD_STS_INTRMDT) {
		QPRINTK(qdev, DRV, ERR,
			"Port Config sent, wait for IDC.\n");
	} else	if (mbcp->mbox_out[0] != MB_CMD_STS_GOOD) {
		QPRINTK(qdev, DRV, ERR,
			"Failed Set Port Configuration.\n");
		status = -EIO;
	}
	return status;
}

/* Get link settings and maximum frame size settings
 * for the current port.
 * Most likely will block.
 */
static int ql_mb_get_port_cfg(struct ql_adapter *qdev)
{
	struct mbox_params mbc;
	struct mbox_params *mbcp = &mbc;
	int status = 0;

	memset(mbcp, 0, sizeof(struct mbox_params));

	mbcp->in_count = 1;
	mbcp->out_count = 3;

	mbcp->mbox_in[0] = MB_CMD_GET_PORT_CFG;

	status = ql_mailbox_command(qdev, mbcp);
	if (status)
		return status;

	if (mbcp->mbox_out[0] != MB_CMD_STS_GOOD) {
		QPRINTK(qdev, DRV, ERR,
			"Failed Get Port Configuration.\n");
		status = -EIO;
	} else	{
		QPRINTK(qdev, DRV, DEBUG,
			"Passed Get Port Configuration.\n");
		qdev->link_config = mbcp->mbox_out[1];
		qdev->max_frame_size = mbcp->mbox_out[2];
	}
	return status;
}

/* IDC - Inter Device Communication...
 * Some firmware commands require consent of adjacent FCOE
 * function.  This function waits for the OK, or a
 * counter-request for a little more time.i
 * The firmware will complete the request if the other
 * function doesn't respond.
 */
static int ql_idc_wait(struct ql_adapter *qdev)
{
	int status = -ETIMEDOUT;
	long wait_time = 1 * HZ;
	struct mbox_params *mbcp = &qdev->idc_mbc;
	do {
		/* Wait here for the command to complete
		 * via the IDC process.
		 */
		wait_time =
			wait_for_completion_timeout(&qdev->ide_completion,
							wait_time);
		if (!wait_time) {
			QPRINTK(qdev, DRV, ERR,
				"IDC Timeout.\n");
			break;
		}
		/* Now examine the response from the IDC process.
		 * We might have a good completion or a request for
		 * more wait time.
		 */
		if (mbcp->mbox_out[0] == AEN_IDC_EXT) {
			QPRINTK(qdev, DRV, ERR,
				"IDC Time Extension from function.\n");
			wait_time += (mbcp->mbox_out[1] >> 8) & 0x0000000f;
		} else if (mbcp->mbox_out[0] == AEN_IDC_CMPLT) {
			QPRINTK(qdev, DRV, ERR,
				"IDC Success.\n");
			status = 0;
			break;
		} else {
			QPRINTK(qdev, DRV, ERR,
				"IDC: Invalid State 0x%.04x.\n",
				mbcp->mbox_out[0]);
			status = -EIO;
			break;
		}
	} while (wait_time);

	return status;
}

/* API called in work thread context to set new TX/RX
 * maximum frame size values to match MTU.
 */
static int ql_set_port_cfg(struct ql_adapter *qdev)
{
	int status;
	rtnl_lock();
	status = ql_mb_set_port_cfg(qdev);
	rtnl_unlock();
	if (status)
		return status;
	status = ql_idc_wait(qdev);
	return status;
}

/* The following routines are worker threads that process
 * events that may sleep waiting for completion.
 */

/* This thread gets the maximum TX and RX frame size values
 * from the firmware and, if necessary, changes them to match
 * the MTU setting.
 */
void ql_mpi_port_cfg_work(struct work_struct *work)
{
	struct ql_adapter *qdev =
	    container_of(work, struct ql_adapter, mpi_port_cfg_work.work);
	int status;

	rtnl_lock();
	status = ql_mb_get_port_cfg(qdev);
	rtnl_unlock();
	if (status) {
		QPRINTK(qdev, DRV, ERR,
			"Bug: Failed to get port config data.\n");
		goto err;
	}

	if (qdev->link_config & CFG_JUMBO_FRAME_SIZE &&
			qdev->max_frame_size ==
			CFG_DEFAULT_MAX_FRAME_SIZE)
		goto end;

	qdev->link_config |=	CFG_JUMBO_FRAME_SIZE;
	qdev->max_frame_size = CFG_DEFAULT_MAX_FRAME_SIZE;
	status = ql_set_port_cfg(qdev);
	if (status) {
		QPRINTK(qdev, DRV, ERR,
			"Bug: Failed to set port config data.\n");
		goto err;
	}
end:
	clear_bit(QL_PORT_CFG, &qdev->flags);
	return;
err:
	ql_queue_fw_error(qdev);
	goto end;
}

/* Process an inter-device request.  This is issues by
 * the firmware in response to another function requesting
 * a change to the port. We set a flag to indicate a change
 * has been made and then send a mailbox command ACKing
 * the change request.
 */
void ql_mpi_idc_work(struct work_struct *work)
{
	struct ql_adapter *qdev =
	    container_of(work, struct ql_adapter, mpi_idc_work.work);
	int status;
	struct mbox_params *mbcp = &qdev->idc_mbc;
	u32 aen;

	aen = mbcp->mbox_out[1] >> 16;

	switch (aen) {
	default:
		QPRINTK(qdev, DRV, ERR,
			"Bug: Unhandled IDC action.\n");
		break;
	case MB_CMD_PORT_RESET:
	case MB_CMD_SET_PORT_CFG:
	case MB_CMD_STOP_FW:
		ql_link_off(qdev);
		/* Signal the resulting link up AEN
		 * that the frame routing and mac addr
		 * needs to be set.
		 * */
		set_bit(QL_CAM_RT_SET, &qdev->flags);
		rtnl_lock();
		status = ql_mb_idc_ack(qdev);
		rtnl_unlock();
		if (status) {
			QPRINTK(qdev, DRV, ERR,
			"Bug: No pending IDC!\n");
		}
	}
}

void ql_mpi_work(struct work_struct *work)
{
	struct ql_adapter *qdev =
	    container_of(work, struct ql_adapter, mpi_work.work);
	struct mbox_params mbc;
	struct mbox_params *mbcp = &mbc;
	int err = 0;

	rtnl_lock();

	while (ql_read32(qdev, STS) & STS_PI) {
		memset(mbcp, 0, sizeof(struct mbox_params));
		mbcp->out_count = 1;
		/* Don't continue if an async event
		 * did not complete properly.
		 */
		err = ql_mpi_handler(qdev, mbcp);
		if (err)
			break;
	}

	rtnl_unlock();
	ql_enable_completion_interrupt(qdev, 0);
}

void ql_mpi_reset_work(struct work_struct *work)
{
	struct ql_adapter *qdev =
	    container_of(work, struct ql_adapter, mpi_reset_work.work);
	cancel_delayed_work_sync(&qdev->mpi_work);
	cancel_delayed_work_sync(&qdev->mpi_port_cfg_work);
	cancel_delayed_work_sync(&qdev->mpi_idc_work);
	ql_soft_reset_mpi_risc(qdev);
}
OpenPOWER on IntegriCloud