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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / scsi / aacraid / src.c
blob787ec9baebb0b8d2cc03e40c6c7234cc01c20ae3
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Adaptec AAC series RAID controller driver
4 * (c) Copyright 2001 Red Hat Inc.
5 *
6 * based on the old aacraid driver that is..
7 * Adaptec aacraid device driver for Linux.
8 *
9 * Copyright (c) 2000-2010 Adaptec, Inc.
10 * 2010-2015 PMC-Sierra, Inc. (aacraid@pmc-sierra.com)
11 * 2016-2017 Microsemi Corp. (aacraid@microsemi.com)
12 *
13 * Module Name:
14 * src.c
15 *
16 * Abstract: Hardware Device Interface for PMC SRC based controllers
17 */
18
19 #include <linux/kernel.h>
20 #include <linux/init.h>
21 #include <linux/types.h>
22 #include <linux/pci.h>
23 #include <linux/spinlock.h>
24 #include <linux/slab.h>
25 #include <linux/blkdev.h>
26 #include <linux/delay.h>
27 #include <linux/completion.h>
28 #include <linux/time.h>
29 #include <linux/interrupt.h>
30 #include <scsi/scsi_host.h>
31
32 #include "aacraid.h"
33
34 static int aac_src_get_sync_status(struct aac_dev *dev);
35
36 static irqreturn_t aac_src_intr_message(int irq, void *dev_id)
37 {
38 struct aac_msix_ctx *ctx;
39 struct aac_dev *dev;
40 unsigned long bellbits, bellbits_shifted;
41 int vector_no;
42 int isFastResponse, mode;
43 u32 index, handle;
44
45 ctx = (struct aac_msix_ctx *)dev_id;
46 dev = ctx->dev;
47 vector_no = ctx->vector_no;
48
49 if (dev->msi_enabled) {
50 mode = AAC_INT_MODE_MSI;
51 if (vector_no == 0) {
52 bellbits = src_readl(dev, MUnit.ODR_MSI);
53 if (bellbits & 0x40000)
54 mode |= AAC_INT_MODE_AIF;
55 if (bellbits & 0x1000)
56 mode |= AAC_INT_MODE_SYNC;
57 }
58 } else {
59 mode = AAC_INT_MODE_INTX;
60 bellbits = src_readl(dev, MUnit.ODR_R);
61 if (bellbits & PmDoorBellResponseSent) {
62 bellbits = PmDoorBellResponseSent;
63 src_writel(dev, MUnit.ODR_C, bellbits);
64 src_readl(dev, MUnit.ODR_C);
65 } else {
66 bellbits_shifted = (bellbits >> SRC_ODR_SHIFT);
67 src_writel(dev, MUnit.ODR_C, bellbits);
68 src_readl(dev, MUnit.ODR_C);
69
70 if (bellbits_shifted & DoorBellAifPending)
71 mode |= AAC_INT_MODE_AIF;
72 else if (bellbits_shifted & OUTBOUNDDOORBELL_0)
73 mode |= AAC_INT_MODE_SYNC;
74 }
75 }
76
77 if (mode & AAC_INT_MODE_SYNC) {
78 unsigned long sflags;
79 struct list_head *entry;
80 int send_it = 0;
81 extern int aac_sync_mode;
82
83 if (!aac_sync_mode && !dev->msi_enabled) {
84 src_writel(dev, MUnit.ODR_C, bellbits);
85 src_readl(dev, MUnit.ODR_C);
86 }
87
88 if (dev->sync_fib) {
89 if (dev->sync_fib->callback)
90 dev->sync_fib->callback(dev->sync_fib->callback_data,
91 dev->sync_fib);
92 spin_lock_irqsave(&dev->sync_fib->event_lock, sflags);
93 if (dev->sync_fib->flags & FIB_CONTEXT_FLAG_WAIT) {
94 dev->management_fib_count--;
95 complete(&dev->sync_fib->event_wait);
96 }
97 spin_unlock_irqrestore(&dev->sync_fib->event_lock,
98 sflags);
99 spin_lock_irqsave(&dev->sync_lock, sflags);
100 if (!list_empty(&dev->sync_fib_list)) {
101 entry = dev->sync_fib_list.next;
102 dev->sync_fib = list_entry(entry,
103 struct fib,
104 fiblink);
105 list_del(entry);
106 send_it = 1;
107 } else {
108 dev->sync_fib = NULL;
109 }
110 spin_unlock_irqrestore(&dev->sync_lock, sflags);
111 if (send_it) {
112 aac_adapter_sync_cmd(dev, SEND_SYNCHRONOUS_FIB,
113 (u32)dev->sync_fib->hw_fib_pa,
114 0, 0, 0, 0, 0,
115 NULL, NULL, NULL, NULL, NULL);
116 }
117 }
118 if (!dev->msi_enabled)
119 mode = 0;
120
121 }
122
123 if (mode & AAC_INT_MODE_AIF) {
124 /* handle AIF */
125 if (dev->sa_firmware) {
126 u32 events = src_readl(dev, MUnit.SCR0);
127
128 aac_intr_normal(dev, events, 1, 0, NULL);
129 writel(events, &dev->IndexRegs->Mailbox[0]);
130 src_writel(dev, MUnit.IDR, 1 << 23);
131 } else {
132 if (dev->aif_thread && dev->fsa_dev)
133 aac_intr_normal(dev, 0, 2, 0, NULL);
134 }
135 if (dev->msi_enabled)
136 aac_src_access_devreg(dev, AAC_CLEAR_AIF_BIT);
137 mode = 0;
138 }
139
140 if (mode) {
141 index = dev->host_rrq_idx[vector_no];
142
143 for (;;) {
144 isFastResponse = 0;
145 /* remove toggle bit (31) */
146 handle = le32_to_cpu((dev->host_rrq[index])
147 & 0x7fffffff);
148 /* check fast response bits (30, 1) */
149 if (handle & 0x40000000)
150 isFastResponse = 1;
151 handle &= 0x0000ffff;
152 if (handle == 0)
153 break;
154 handle >>= 2;
155 if (dev->msi_enabled && dev->max_msix > 1)
156 atomic_dec(&dev->rrq_outstanding[vector_no]);
157 aac_intr_normal(dev, handle, 0, isFastResponse, NULL);
158 dev->host_rrq[index++] = 0;
159 if (index == (vector_no + 1) * dev->vector_cap)
160 index = vector_no * dev->vector_cap;
161 dev->host_rrq_idx[vector_no] = index;
162 }
163 mode = 0;
164 }
165
166 return IRQ_HANDLED;
167 }
168
169 /**
170 * aac_src_disable_interrupt - Disable interrupts
171 * @dev: Adapter
172 */
173
174 static void aac_src_disable_interrupt(struct aac_dev *dev)
175 {
176 src_writel(dev, MUnit.OIMR, dev->OIMR = 0xffffffff);
177 }
178
179 /**
180 * aac_src_enable_interrupt_message - Enable interrupts
181 * @dev: Adapter
182 */
183
184 static void aac_src_enable_interrupt_message(struct aac_dev *dev)
185 {
186 aac_src_access_devreg(dev, AAC_ENABLE_INTERRUPT);
187 }
188
189 /**
190 * src_sync_cmd - send a command and wait
191 * @dev: Adapter
192 * @command: Command to execute
193 * @p1: first parameter
194 * @ret: adapter status
195 *
196 * This routine will send a synchronous command to the adapter and wait
197 * for its completion.
198 */
199
200 static int src_sync_cmd(struct aac_dev *dev, u32 command,
201 u32 p1, u32 p2, u32 p3, u32 p4, u32 p5, u32 p6,
202 u32 *status, u32 * r1, u32 * r2, u32 * r3, u32 * r4)
203 {
204 unsigned long start;
205 unsigned long delay;
206 int ok;
207
208 /*
209 * Write the command into Mailbox 0
210 */
211 writel(command, &dev->IndexRegs->Mailbox[0]);
212 /*
213 * Write the parameters into Mailboxes 1 - 6
214 */
215 writel(p1, &dev->IndexRegs->Mailbox[1]);
216 writel(p2, &dev->IndexRegs->Mailbox[2]);
217 writel(p3, &dev->IndexRegs->Mailbox[3]);
218 writel(p4, &dev->IndexRegs->Mailbox[4]);
219
220 /*
221 * Clear the synch command doorbell to start on a clean slate.
222 */
223 if (!dev->msi_enabled)
224 src_writel(dev,
225 MUnit.ODR_C,
226 OUTBOUNDDOORBELL_0 << SRC_ODR_SHIFT);
227
228 /*
229 * Disable doorbell interrupts
230 */
231 src_writel(dev, MUnit.OIMR, dev->OIMR = 0xffffffff);
232
233 /*
234 * Force the completion of the mask register write before issuing
235 * the interrupt.
236 */
237 src_readl(dev, MUnit.OIMR);
238
239 /*
240 * Signal that there is a new synch command
241 */
242 src_writel(dev, MUnit.IDR, INBOUNDDOORBELL_0 << SRC_IDR_SHIFT);
243
244 if ((!dev->sync_mode || command != SEND_SYNCHRONOUS_FIB) &&
245 !dev->in_soft_reset) {
246 ok = 0;
247 start = jiffies;
248
249 if (command == IOP_RESET_ALWAYS) {
250 /* Wait up to 10 sec */
251 delay = 10*HZ;
252 } else {
253 /* Wait up to 5 minutes */
254 delay = 300*HZ;
255 }
256 while (time_before(jiffies, start+delay)) {
257 udelay(5); /* Delay 5 microseconds to let Mon960 get info. */
258 /*
259 * Mon960 will set doorbell0 bit when it has completed the command.
260 */
261 if (aac_src_get_sync_status(dev) & OUTBOUNDDOORBELL_0) {
262 /*
263 * Clear the doorbell.
264 */
265 if (dev->msi_enabled)
266 aac_src_access_devreg(dev,
267 AAC_CLEAR_SYNC_BIT);
268 else
269 src_writel(dev,
270 MUnit.ODR_C,
271 OUTBOUNDDOORBELL_0 << SRC_ODR_SHIFT);
272 ok = 1;
273 break;
274 }
275 /*
276 * Yield the processor in case we are slow
277 */
278 msleep(1);
279 }
280 if (unlikely(ok != 1)) {
281 /*
282 * Restore interrupt mask even though we timed out
283 */
284 aac_adapter_enable_int(dev);
285 return -ETIMEDOUT;
286 }
287 /*
288 * Pull the synch status from Mailbox 0.
289 */
290 if (status)
291 *status = readl(&dev->IndexRegs->Mailbox[0]);
292 if (r1)
293 *r1 = readl(&dev->IndexRegs->Mailbox[1]);
294 if (r2)
295 *r2 = readl(&dev->IndexRegs->Mailbox[2]);
296 if (r3)
297 *r3 = readl(&dev->IndexRegs->Mailbox[3]);
298 if (r4)
299 *r4 = readl(&dev->IndexRegs->Mailbox[4]);
300 if (command == GET_COMM_PREFERRED_SETTINGS)
301 dev->max_msix =
302 readl(&dev->IndexRegs->Mailbox[5]) & 0xFFFF;
303 /*
304 * Clear the synch command doorbell.
305 */
306 if (!dev->msi_enabled)
307 src_writel(dev,
308 MUnit.ODR_C,
309 OUTBOUNDDOORBELL_0 << SRC_ODR_SHIFT);
310 }
311
312 /*
313 * Restore interrupt mask
314 */
315 aac_adapter_enable_int(dev);
316 return 0;
317 }
318
319 /**
320 * aac_src_interrupt_adapter - interrupt adapter
321 * @dev: Adapter
322 *
323 * Send an interrupt to the i960 and breakpoint it.
324 */
325
326 static void aac_src_interrupt_adapter(struct aac_dev *dev)
327 {
328 src_sync_cmd(dev, BREAKPOINT_REQUEST,
329 0, 0, 0, 0, 0, 0,
330 NULL, NULL, NULL, NULL, NULL);
331 }
332
333 /**
334 * aac_src_notify_adapter - send an event to the adapter
335 * @dev: Adapter
336 * @event: Event to send
337 *
338 * Notify the i960 that something it probably cares about has
339 * happened.
340 */
341
342 static void aac_src_notify_adapter(struct aac_dev *dev, u32 event)
343 {
344 switch (event) {
345
346 case AdapNormCmdQue:
347 src_writel(dev, MUnit.ODR_C,
348 INBOUNDDOORBELL_1 << SRC_ODR_SHIFT);
349 break;
350 case HostNormRespNotFull:
351 src_writel(dev, MUnit.ODR_C,
352 INBOUNDDOORBELL_4 << SRC_ODR_SHIFT);
353 break;
354 case AdapNormRespQue:
355 src_writel(dev, MUnit.ODR_C,
356 INBOUNDDOORBELL_2 << SRC_ODR_SHIFT);
357 break;
358 case HostNormCmdNotFull:
359 src_writel(dev, MUnit.ODR_C,
360 INBOUNDDOORBELL_3 << SRC_ODR_SHIFT);
361 break;
362 case FastIo:
363 src_writel(dev, MUnit.ODR_C,
364 INBOUNDDOORBELL_6 << SRC_ODR_SHIFT);
365 break;
366 case AdapPrintfDone:
367 src_writel(dev, MUnit.ODR_C,
368 INBOUNDDOORBELL_5 << SRC_ODR_SHIFT);
369 break;
370 default:
371 BUG();
372 break;
373 }
374 }
375
376 /**
377 * aac_src_start_adapter - activate adapter
378 * @dev: Adapter
379 *
380 * Start up processing on an i960 based AAC adapter
381 */
382
383 static void aac_src_start_adapter(struct aac_dev *dev)
384 {
385 union aac_init *init;
386 int i;
387
388 /* reset host_rrq_idx first */
389 for (i = 0; i < dev->max_msix; i++) {
390 dev->host_rrq_idx[i] = i * dev->vector_cap;
391 atomic_set(&dev->rrq_outstanding[i], 0);
392 }
393 atomic_set(&dev->msix_counter, 0);
394 dev->fibs_pushed_no = 0;
395
396 init = dev->init;
397 if (dev->comm_interface == AAC_COMM_MESSAGE_TYPE3) {
398 init->r8.host_elapsed_seconds =
399 cpu_to_le32(ktime_get_real_seconds());
400 src_sync_cmd(dev, INIT_STRUCT_BASE_ADDRESS,
401 lower_32_bits(dev->init_pa),
402 upper_32_bits(dev->init_pa),
403 sizeof(struct _r8) +
404 (AAC_MAX_HRRQ - 1) * sizeof(struct _rrq),
405 0, 0, 0, NULL, NULL, NULL, NULL, NULL);
406 } else {
407 init->r7.host_elapsed_seconds =
408 cpu_to_le32(ktime_get_real_seconds());
409 // We can only use a 32 bit address here
410 src_sync_cmd(dev, INIT_STRUCT_BASE_ADDRESS,
411 (u32)(ulong)dev->init_pa, 0, 0, 0, 0, 0,
412 NULL, NULL, NULL, NULL, NULL);
413 }
414
415 }
416
417 /**
418 * aac_src_check_health
419 * @dev: device to check if healthy
420 *
421 * Will attempt to determine if the specified adapter is alive and
422 * capable of handling requests, returning 0 if alive.
423 */
424 static int aac_src_check_health(struct aac_dev *dev)
425 {
426 u32 status = src_readl(dev, MUnit.OMR);
427
428 /*
429 * Check to see if the board panic'd.
430 */
431 if (unlikely(status & KERNEL_PANIC))
432 goto err_blink;
433
434 /*
435 * Check to see if the board failed any self tests.
436 */
437 if (unlikely(status & SELF_TEST_FAILED))
438 goto err_out;
439
440 /*
441 * Check to see if the board failed any self tests.
442 */
443 if (unlikely(status & MONITOR_PANIC))
444 goto err_out;
445
446 /*
447 * Wait for the adapter to be up and running.
448 */
449 if (unlikely(!(status & KERNEL_UP_AND_RUNNING)))
450 return -3;
451 /*
452 * Everything is OK
453 */
454 return 0;
455
456 err_out:
457 return -1;
458
459 err_blink:
460 return (status >> 16) & 0xFF;
461 }
462
463 static inline u32 aac_get_vector(struct aac_dev *dev)
464 {
465 return atomic_inc_return(&dev->msix_counter)%dev->max_msix;
466 }
467
468 /**
469 * aac_src_deliver_message
470 * @fib: fib to issue
471 *
472 * Will send a fib, returning 0 if successful.
473 */
474 static int aac_src_deliver_message(struct fib *fib)
475 {
476 struct aac_dev *dev = fib->dev;
477 struct aac_queue *q = &dev->queues->queue[AdapNormCmdQueue];
478 u32 fibsize;
479 dma_addr_t address;
480 struct aac_fib_xporthdr *pFibX;
481 int native_hba;
482 #if !defined(writeq)
483 unsigned long flags;
484 #endif
485
486 u16 vector_no;
487
488 atomic_inc(&q->numpending);
489
490 native_hba = (fib->flags & FIB_CONTEXT_FLAG_NATIVE_HBA) ? 1 : 0;
491
492
493 if (dev->msi_enabled && dev->max_msix > 1 &&
494 (native_hba || fib->hw_fib_va->header.Command != AifRequest)) {
495
496 if ((dev->comm_interface == AAC_COMM_MESSAGE_TYPE3)
497 && dev->sa_firmware)
498 vector_no = aac_get_vector(dev);
499 else
500 vector_no = fib->vector_no;
501
502 if (native_hba) {
503 if (fib->flags & FIB_CONTEXT_FLAG_NATIVE_HBA_TMF) {
504 struct aac_hba_tm_req *tm_req;
505
506 tm_req = (struct aac_hba_tm_req *)
507 fib->hw_fib_va;
508 if (tm_req->iu_type ==
509 HBA_IU_TYPE_SCSI_TM_REQ) {
510 ((struct aac_hba_tm_req *)
511 fib->hw_fib_va)->reply_qid
512 = vector_no;
513 ((struct aac_hba_tm_req *)
514 fib->hw_fib_va)->request_id
515 += (vector_no << 16);
516 } else {
517 ((struct aac_hba_reset_req *)
518 fib->hw_fib_va)->reply_qid
519 = vector_no;
520 ((struct aac_hba_reset_req *)
521 fib->hw_fib_va)->request_id
522 += (vector_no << 16);
523 }
524 } else {
525 ((struct aac_hba_cmd_req *)
526 fib->hw_fib_va)->reply_qid
527 = vector_no;
528 ((struct aac_hba_cmd_req *)
529 fib->hw_fib_va)->request_id
530 += (vector_no << 16);
531 }
532 } else {
533 fib->hw_fib_va->header.Handle += (vector_no << 16);
534 }
535 } else {
536 vector_no = 0;
537 }
538
539 atomic_inc(&dev->rrq_outstanding[vector_no]);
540
541 if (native_hba) {
542 address = fib->hw_fib_pa;
543 fibsize = (fib->hbacmd_size + 127) / 128 - 1;
544 if (fibsize > 31)
545 fibsize = 31;
546 address |= fibsize;
547 #if defined(writeq)
548 src_writeq(dev, MUnit.IQN_L, (u64)address);
549 #else
550 spin_lock_irqsave(&fib->dev->iq_lock, flags);
551 src_writel(dev, MUnit.IQN_H,
552 upper_32_bits(address) & 0xffffffff);
553 src_writel(dev, MUnit.IQN_L, address & 0xffffffff);
554 spin_unlock_irqrestore(&fib->dev->iq_lock, flags);
555 #endif
556 } else {
557 if (dev->comm_interface == AAC_COMM_MESSAGE_TYPE2 ||
558 dev->comm_interface == AAC_COMM_MESSAGE_TYPE3) {
559 /* Calculate the amount to the fibsize bits */
560 fibsize = (le16_to_cpu(fib->hw_fib_va->header.Size)
561 + 127) / 128 - 1;
562 /* New FIB header, 32-bit */
563 address = fib->hw_fib_pa;
564 fib->hw_fib_va->header.StructType = FIB_MAGIC2;
565 fib->hw_fib_va->header.SenderFibAddress =
566 cpu_to_le32((u32)address);
567 fib->hw_fib_va->header.u.TimeStamp = 0;
568 WARN_ON(upper_32_bits(address) != 0L);
569 } else {
570 /* Calculate the amount to the fibsize bits */
571 fibsize = (sizeof(struct aac_fib_xporthdr) +
572 le16_to_cpu(fib->hw_fib_va->header.Size)
573 + 127) / 128 - 1;
574 /* Fill XPORT header */
575 pFibX = (struct aac_fib_xporthdr *)
576 ((unsigned char *)fib->hw_fib_va -
577 sizeof(struct aac_fib_xporthdr));
578 pFibX->Handle = fib->hw_fib_va->header.Handle;
579 pFibX->HostAddress =
580 cpu_to_le64((u64)fib->hw_fib_pa);
581 pFibX->Size = cpu_to_le32(
582 le16_to_cpu(fib->hw_fib_va->header.Size));
583 address = fib->hw_fib_pa -
584 (u64)sizeof(struct aac_fib_xporthdr);
585 }
586 if (fibsize > 31)
587 fibsize = 31;
588 address |= fibsize;
589
590 #if defined(writeq)
591 src_writeq(dev, MUnit.IQ_L, (u64)address);
592 #else
593 spin_lock_irqsave(&fib->dev->iq_lock, flags);
594 src_writel(dev, MUnit.IQ_H,
595 upper_32_bits(address) & 0xffffffff);
596 src_writel(dev, MUnit.IQ_L, address & 0xffffffff);
597 spin_unlock_irqrestore(&fib->dev->iq_lock, flags);
598 #endif
599 }
600 return 0;
601 }
602
603 /**
604 * aac_src_ioremap
605 * @size: mapping resize request
606 *
607 */
608 static int aac_src_ioremap(struct aac_dev *dev, u32 size)
609 {
610 if (!size) {
611 iounmap(dev->regs.src.bar1);
612 dev->regs.src.bar1 = NULL;
613 iounmap(dev->regs.src.bar0);
614 dev->base = dev->regs.src.bar0 = NULL;
615 return 0;
616 }
617 dev->regs.src.bar1 = ioremap(pci_resource_start(dev->pdev, 2),
618 AAC_MIN_SRC_BAR1_SIZE);
619 dev->base = NULL;
620 if (dev->regs.src.bar1 == NULL)
621 return -1;
622 dev->base = dev->regs.src.bar0 = ioremap(dev->base_start, size);
623 if (dev->base == NULL) {
624 iounmap(dev->regs.src.bar1);
625 dev->regs.src.bar1 = NULL;
626 return -1;
627 }
628 dev->IndexRegs = &((struct src_registers __iomem *)
629 dev->base)->u.tupelo.IndexRegs;
630 return 0;
631 }
632
633 /**
634 * aac_srcv_ioremap
635 * @size: mapping resize request
636 *
637 */
638 static int aac_srcv_ioremap(struct aac_dev *dev, u32 size)
639 {
640 if (!size) {
641 iounmap(dev->regs.src.bar0);
642 dev->base = dev->regs.src.bar0 = NULL;
643 return 0;
644 }
645
646 dev->regs.src.bar1 =
647 ioremap(pci_resource_start(dev->pdev, 2), AAC_MIN_SRCV_BAR1_SIZE);
648 dev->base = NULL;
649 if (dev->regs.src.bar1 == NULL)
650 return -1;
651 dev->base = dev->regs.src.bar0 = ioremap(dev->base_start, size);
652 if (dev->base == NULL) {
653 iounmap(dev->regs.src.bar1);
654 dev->regs.src.bar1 = NULL;
655 return -1;
656 }
657 dev->IndexRegs = &((struct src_registers __iomem *)
658 dev->base)->u.denali.IndexRegs;
659 return 0;
660 }
661
662 void aac_set_intx_mode(struct aac_dev *dev)
663 {
664 if (dev->msi_enabled) {
665 aac_src_access_devreg(dev, AAC_ENABLE_INTX);
666 dev->msi_enabled = 0;
667 msleep(5000); /* Delay 5 seconds */
668 }
669 }
670
671 static void aac_clear_omr(struct aac_dev *dev)
672 {
673 u32 omr_value = 0;
674
675 omr_value = src_readl(dev, MUnit.OMR);
676
677 /*
678 * Check for PCI Errors or Kernel Panic
679 */
680 if ((omr_value == INVALID_OMR) || (omr_value & KERNEL_PANIC))
681 omr_value = 0;
682
683 /*
684 * Preserve MSIX Value if any
685 */
686 src_writel(dev, MUnit.OMR, omr_value & AAC_INT_MODE_MSIX);
687 src_readl(dev, MUnit.OMR);
688 }
689
690 static void aac_dump_fw_fib_iop_reset(struct aac_dev *dev)
691 {
692 __le32 supported_options3;
693
694 if (!aac_fib_dump)
695 return;
696
697 supported_options3 = dev->supplement_adapter_info.supported_options3;
698 if (!(supported_options3 & AAC_OPTION_SUPPORTED3_IOP_RESET_FIB_DUMP))
699 return;
700
701 aac_adapter_sync_cmd(dev, IOP_RESET_FW_FIB_DUMP,
702 0, 0, 0, 0, 0, 0, NULL, NULL, NULL, NULL, NULL);
703 }
704
705 static bool aac_is_ctrl_up_and_running(struct aac_dev *dev)
706 {
707 bool ctrl_up = true;
708 unsigned long status, start;
709 bool is_up = false;
710
711 start = jiffies;
712 do {
713 schedule();
714 status = src_readl(dev, MUnit.OMR);
715
716 if (status == 0xffffffff)
717 status = 0;
718
719 if (status & KERNEL_BOOTING) {
720 start = jiffies;
721 continue;
722 }
723
724 if (time_after(jiffies, start+HZ*SOFT_RESET_TIME)) {
725 ctrl_up = false;
726 break;
727 }
728
729 is_up = status & KERNEL_UP_AND_RUNNING;
730
731 } while (!is_up);
732
733 return ctrl_up;
734 }
735
736 static void aac_src_drop_io(struct aac_dev *dev)
737 {
738 if (!dev->soft_reset_support)
739 return;
740
741 aac_adapter_sync_cmd(dev, DROP_IO,
742 0, 0, 0, 0, 0, 0, NULL, NULL, NULL, NULL, NULL);
743 }
744
745 static void aac_notify_fw_of_iop_reset(struct aac_dev *dev)
746 {
747 aac_adapter_sync_cmd(dev, IOP_RESET_ALWAYS, 0, 0, 0, 0, 0, 0, NULL,
748 NULL, NULL, NULL, NULL);
749 aac_src_drop_io(dev);
750 }
751
752 static void aac_send_iop_reset(struct aac_dev *dev)
753 {
754 aac_dump_fw_fib_iop_reset(dev);
755
756 aac_notify_fw_of_iop_reset(dev);
757
758 aac_set_intx_mode(dev);
759
760 aac_clear_omr(dev);
761
762 src_writel(dev, MUnit.IDR, IOP_SRC_RESET_MASK);
763
764 msleep(5000);
765 }
766
767 static void aac_send_hardware_soft_reset(struct aac_dev *dev)
768 {
769 u_int32_t val;
770
771 aac_clear_omr(dev);
772 val = readl(((char *)(dev->base) + IBW_SWR_OFFSET));
773 val |= 0x01;
774 writel(val, ((char *)(dev->base) + IBW_SWR_OFFSET));
775 msleep_interruptible(20000);
776 }
777
778 static int aac_src_restart_adapter(struct aac_dev *dev, int bled, u8 reset_type)
779 {
780 bool is_ctrl_up;
781 int ret = 0;
782
783 if (bled < 0)
784 goto invalid_out;
785
786 if (bled)
787 dev_err(&dev->pdev->dev, "adapter kernel panic'd %x.\n", bled);
788
789 /*
790 * When there is a BlinkLED, IOP_RESET has not effect
791 */
792 if (bled >= 2 && dev->sa_firmware && reset_type & HW_IOP_RESET)
793 reset_type &= ~HW_IOP_RESET;
794
795 dev->a_ops.adapter_enable_int = aac_src_disable_interrupt;
796
797 dev_err(&dev->pdev->dev, "Controller reset type is %d\n", reset_type);
798
799 if (reset_type & HW_IOP_RESET) {
800 dev_info(&dev->pdev->dev, "Issuing IOP reset\n");
801 aac_send_iop_reset(dev);
802
803 /*
804 * Creates a delay or wait till up and running comes thru
805 */
806 is_ctrl_up = aac_is_ctrl_up_and_running(dev);
807 if (!is_ctrl_up)
808 dev_err(&dev->pdev->dev, "IOP reset failed\n");
809 else {
810 dev_info(&dev->pdev->dev, "IOP reset succeeded\n");
811 goto set_startup;
812 }
813 }
814
815 if (!dev->sa_firmware) {
816 dev_err(&dev->pdev->dev, "ARC Reset attempt failed\n");
817 ret = -ENODEV;
818 goto out;
819 }
820
821 if (reset_type & HW_SOFT_RESET) {
822 dev_info(&dev->pdev->dev, "Issuing SOFT reset\n");
823 aac_send_hardware_soft_reset(dev);
824 dev->msi_enabled = 0;
825
826 is_ctrl_up = aac_is_ctrl_up_and_running(dev);
827 if (!is_ctrl_up) {
828 dev_err(&dev->pdev->dev, "SOFT reset failed\n");
829 ret = -ENODEV;
830 goto out;
831 } else
832 dev_info(&dev->pdev->dev, "SOFT reset succeeded\n");
833 }
834
835 set_startup:
836 if (startup_timeout < 300)
837 startup_timeout = 300;
838
839 out:
840 return ret;
841
842 invalid_out:
843 if (src_readl(dev, MUnit.OMR) & KERNEL_PANIC)
844 ret = -ENODEV;
845 goto out;
846 }
847
848 /**
849 * aac_src_select_comm - Select communications method
850 * @dev: Adapter
851 * @comm: communications method
852 */
853 static int aac_src_select_comm(struct aac_dev *dev, int comm)
854 {
855 switch (comm) {
856 case AAC_COMM_MESSAGE:
857 dev->a_ops.adapter_intr = aac_src_intr_message;
858 dev->a_ops.adapter_deliver = aac_src_deliver_message;
859 break;
860 default:
861 return 1;
862 }
863 return 0;
864 }
865
866 /**
867 * aac_src_init - initialize an Cardinal Frey Bar card
868 * @dev: device to configure
869 *
870 */
871
872 int aac_src_init(struct aac_dev *dev)
873 {
874 unsigned long start;
875 unsigned long status;
876 int restart = 0;
877 int instance = dev->id;
878 const char *name = dev->name;
879
880 dev->a_ops.adapter_ioremap = aac_src_ioremap;
881 dev->a_ops.adapter_comm = aac_src_select_comm;
882
883 dev->base_size = AAC_MIN_SRC_BAR0_SIZE;
884 if (aac_adapter_ioremap(dev, dev->base_size)) {
885 printk(KERN_WARNING "%s: unable to map adapter.\n", name);
886 goto error_iounmap;
887 }
888
889 /* Failure to reset here is an option ... */
890 dev->a_ops.adapter_sync_cmd = src_sync_cmd;
891 dev->a_ops.adapter_enable_int = aac_src_disable_interrupt;
892
893 if (dev->init_reset) {
894 dev->init_reset = false;
895 if (!aac_src_restart_adapter(dev, 0, IOP_HWSOFT_RESET))
896 ++restart;
897 }
898
899 /*
900 * Check to see if the board panic'd while booting.
901 */
902 status = src_readl(dev, MUnit.OMR);
903 if (status & KERNEL_PANIC) {
904 if (aac_src_restart_adapter(dev,
905 aac_src_check_health(dev), IOP_HWSOFT_RESET))
906 goto error_iounmap;
907 ++restart;
908 }
909 /*
910 * Check to see if the board failed any self tests.
911 */
912 status = src_readl(dev, MUnit.OMR);
913 if (status & SELF_TEST_FAILED) {
914 printk(KERN_ERR "%s%d: adapter self-test failed.\n",
915 dev->name, instance);
916 goto error_iounmap;
917 }
918 /*
919 * Check to see if the monitor panic'd while booting.
920 */
921 if (status & MONITOR_PANIC) {
922 printk(KERN_ERR "%s%d: adapter monitor panic.\n",
923 dev->name, instance);
924 goto error_iounmap;
925 }
926 start = jiffies;
927 /*
928 * Wait for the adapter to be up and running. Wait up to 3 minutes
929 */
930 while (!((status = src_readl(dev, MUnit.OMR)) &
931 KERNEL_UP_AND_RUNNING)) {
932 if ((restart &&
933 (status & (KERNEL_PANIC|SELF_TEST_FAILED|MONITOR_PANIC))) ||
934 time_after(jiffies, start+HZ*startup_timeout)) {
935 printk(KERN_ERR "%s%d: adapter kernel failed to start, init status = %lx.\n",
936 dev->name, instance, status);
937 goto error_iounmap;
938 }
939 if (!restart &&
940 ((status & (KERNEL_PANIC|SELF_TEST_FAILED|MONITOR_PANIC)) ||
941 time_after(jiffies, start + HZ *
942 ((startup_timeout > 60)
943 ? (startup_timeout - 60)
944 : (startup_timeout / 2))))) {
945 if (likely(!aac_src_restart_adapter(dev,
946 aac_src_check_health(dev), IOP_HWSOFT_RESET)))
947 start = jiffies;
948 ++restart;
949 }
950 msleep(1);
951 }
952 if (restart && aac_commit)
953 aac_commit = 1;
954 /*
955 * Fill in the common function dispatch table.
956 */
957 dev->a_ops.adapter_interrupt = aac_src_interrupt_adapter;
958 dev->a_ops.adapter_disable_int = aac_src_disable_interrupt;
959 dev->a_ops.adapter_enable_int = aac_src_disable_interrupt;
960 dev->a_ops.adapter_notify = aac_src_notify_adapter;
961 dev->a_ops.adapter_sync_cmd = src_sync_cmd;
962 dev->a_ops.adapter_check_health = aac_src_check_health;
963 dev->a_ops.adapter_restart = aac_src_restart_adapter;
964 dev->a_ops.adapter_start = aac_src_start_adapter;
965
966 /*
967 * First clear out all interrupts. Then enable the one's that we
968 * can handle.
969 */
970 aac_adapter_comm(dev, AAC_COMM_MESSAGE);
971 aac_adapter_disable_int(dev);
972 src_writel(dev, MUnit.ODR_C, 0xffffffff);
973 aac_adapter_enable_int(dev);
974
975 if (aac_init_adapter(dev) == NULL)
976 goto error_iounmap;
977 if (dev->comm_interface != AAC_COMM_MESSAGE_TYPE1)
978 goto error_iounmap;
979
980 dev->msi = !pci_enable_msi(dev->pdev);
981
982 dev->aac_msix[0].vector_no = 0;
983 dev->aac_msix[0].dev = dev;
984
985 if (request_irq(dev->pdev->irq, dev->a_ops.adapter_intr,
986 IRQF_SHARED, "aacraid", &(dev->aac_msix[0])) < 0) {
987
988 if (dev->msi)
989 pci_disable_msi(dev->pdev);
990
991 printk(KERN_ERR "%s%d: Interrupt unavailable.\n",
992 name, instance);
993 goto error_iounmap;
994 }
995 dev->dbg_base = pci_resource_start(dev->pdev, 2);
996 dev->dbg_base_mapped = dev->regs.src.bar1;
997 dev->dbg_size = AAC_MIN_SRC_BAR1_SIZE;
998 dev->a_ops.adapter_enable_int = aac_src_enable_interrupt_message;
999
1000 aac_adapter_enable_int(dev);
1001
1002 if (!dev->sync_mode) {
1003 /*
1004 * Tell the adapter that all is configured, and it can
1005 * start accepting requests
1006 */
1007 aac_src_start_adapter(dev);
1008 }
1009 return 0;
1010
1011 error_iounmap:
1012
1013 return -1;
1014 }
1015
1016 static int aac_src_wait_sync(struct aac_dev *dev, int *status)
1017 {
1018 unsigned long start = jiffies;
1019 unsigned long usecs = 0;
1020 int delay = 5 * HZ;
1021 int rc = 1;
1022
1023 while (time_before(jiffies, start+delay)) {
1024 /*
1025 * Delay 5 microseconds to let Mon960 get info.
1026 */
1027 udelay(5);
1028
1029 /*
1030 * Mon960 will set doorbell0 bit when it has completed the
1031 * command.
1032 */
1033 if (aac_src_get_sync_status(dev) & OUTBOUNDDOORBELL_0) {
1034 /*
1035 * Clear: the doorbell.
1036 */
1037 if (dev->msi_enabled)
1038 aac_src_access_devreg(dev, AAC_CLEAR_SYNC_BIT);
1039 else
1040 src_writel(dev, MUnit.ODR_C,
1041 OUTBOUNDDOORBELL_0 << SRC_ODR_SHIFT);
1042 rc = 0;
1043
1044 break;
1045 }
1046
1047 /*
1048 * Yield the processor in case we are slow
1049 */
1050 usecs = 1 * USEC_PER_MSEC;
1051 usleep_range(usecs, usecs + 50);
1052 }
1053 /*
1054 * Pull the synch status from Mailbox 0.
1055 */
1056 if (status && !rc) {
1057 status[0] = readl(&dev->IndexRegs->Mailbox[0]);
1058 status[1] = readl(&dev->IndexRegs->Mailbox[1]);
1059 status[2] = readl(&dev->IndexRegs->Mailbox[2]);
1060 status[3] = readl(&dev->IndexRegs->Mailbox[3]);
1061 status[4] = readl(&dev->IndexRegs->Mailbox[4]);
1062 }
1063
1064 return rc;
1065 }
1066
1067 /**
1068 * aac_src_soft_reset - perform soft reset to speed up
1069 * access
1070 *
1071 * Assumptions: That the controller is in a state where we can
1072 * bring it back to life with an init struct. We can only use
1073 * fast sync commands, as the timeout is 5 seconds.
1074 *
1075 * @dev: device to configure
1076 *
1077 */
1078
1079 static int aac_src_soft_reset(struct aac_dev *dev)
1080 {
1081 u32 status_omr = src_readl(dev, MUnit.OMR);
1082 u32 status[5];
1083 int rc = 1;
1084 int state = 0;
1085 char *state_str[7] = {
1086 "GET_ADAPTER_PROPERTIES Failed",
1087 "GET_ADAPTER_PROPERTIES timeout",
1088 "SOFT_RESET not supported",
1089 "DROP_IO Failed",
1090 "DROP_IO timeout",
1091 "Check Health failed"
1092 };
1093
1094 if (status_omr == INVALID_OMR)
1095 return 1; // pcie hosed
1096
1097 if (!(status_omr & KERNEL_UP_AND_RUNNING))
1098 return 1; // not up and running
1099
1100 /*
1101 * We go into soft reset mode to allow us to handle response
1102 */
1103 dev->in_soft_reset = 1;
1104 dev->msi_enabled = status_omr & AAC_INT_MODE_MSIX;
1105
1106 /* Get adapter properties */
1107 rc = aac_adapter_sync_cmd(dev, GET_ADAPTER_PROPERTIES, 0, 0, 0,
1108 0, 0, 0, status+0, status+1, status+2, status+3, status+4);
1109 if (rc)
1110 goto out;
1111
1112 state++;
1113 if (aac_src_wait_sync(dev, status)) {
1114 rc = 1;
1115 goto out;
1116 }
1117
1118 state++;
1119 if (!(status[1] & le32_to_cpu(AAC_OPT_EXTENDED) &&
1120 (status[4] & le32_to_cpu(AAC_EXTOPT_SOFT_RESET)))) {
1121 rc = 2;
1122 goto out;
1123 }
1124
1125 if ((status[1] & le32_to_cpu(AAC_OPT_EXTENDED)) &&
1126 (status[4] & le32_to_cpu(AAC_EXTOPT_SA_FIRMWARE)))
1127 dev->sa_firmware = 1;
1128
1129 state++;
1130 rc = aac_adapter_sync_cmd(dev, DROP_IO, 0, 0, 0, 0, 0, 0,
1131 status+0, status+1, status+2, status+3, status+4);
1132
1133 if (rc)
1134 goto out;
1135
1136 state++;
1137 if (aac_src_wait_sync(dev, status)) {
1138 rc = 3;
1139 goto out;
1140 }
1141
1142 if (status[1])
1143 dev_err(&dev->pdev->dev, "%s: %d outstanding I/O pending\n",
1144 __func__, status[1]);
1145
1146 state++;
1147 rc = aac_src_check_health(dev);
1148
1149 out:
1150 dev->in_soft_reset = 0;
1151 dev->msi_enabled = 0;
1152 if (rc)
1153 dev_err(&dev->pdev->dev, "%s: %s status = %d", __func__,
1154 state_str[state], rc);
1155
1156 return rc;
1157 }
1158 /**
1159 * aac_srcv_init - initialize an SRCv card
1160 * @dev: device to configure
1161 *
1162 */
1163
1164 int aac_srcv_init(struct aac_dev *dev)
1165 {
1166 unsigned long start;
1167 unsigned long status;
1168 int restart = 0;
1169 int instance = dev->id;
1170 const char *name = dev->name;
1171
1172 dev->a_ops.adapter_ioremap = aac_srcv_ioremap;
1173 dev->a_ops.adapter_comm = aac_src_select_comm;
1174
1175 dev->base_size = AAC_MIN_SRCV_BAR0_SIZE;
1176 if (aac_adapter_ioremap(dev, dev->base_size)) {
1177 printk(KERN_WARNING "%s: unable to map adapter.\n", name);
1178 goto error_iounmap;
1179 }
1180
1181 /* Failure to reset here is an option ... */
1182 dev->a_ops.adapter_sync_cmd = src_sync_cmd;
1183 dev->a_ops.adapter_enable_int = aac_src_disable_interrupt;
1184
1185 if (dev->init_reset) {
1186 dev->init_reset = false;
1187 if (aac_src_soft_reset(dev)) {
1188 aac_src_restart_adapter(dev, 0, IOP_HWSOFT_RESET);
1189 ++restart;
1190 }
1191 }
1192
1193 /*
1194 * Check to see if flash update is running.
1195 * Wait for the adapter to be up and running. Wait up to 5 minutes
1196 */
1197 status = src_readl(dev, MUnit.OMR);
1198 if (status & FLASH_UPD_PENDING) {
1199 start = jiffies;
1200 do {
1201 status = src_readl(dev, MUnit.OMR);
1202 if (time_after(jiffies, start+HZ*FWUPD_TIMEOUT)) {
1203 printk(KERN_ERR "%s%d: adapter flash update failed.\n",
1204 dev->name, instance);
1205 goto error_iounmap;
1206 }
1207 } while (!(status & FLASH_UPD_SUCCESS) &&
1208 !(status & FLASH_UPD_FAILED));
1209 /* Delay 10 seconds.
1210 * Because right now FW is doing a soft reset,
1211 * do not read scratch pad register at this time
1212 */
1213 ssleep(10);
1214 }
1215 /*
1216 * Check to see if the board panic'd while booting.
1217 */
1218 status = src_readl(dev, MUnit.OMR);
1219 if (status & KERNEL_PANIC) {
1220 if (aac_src_restart_adapter(dev,
1221 aac_src_check_health(dev), IOP_HWSOFT_RESET))
1222 goto error_iounmap;
1223 ++restart;
1224 }
1225 /*
1226 * Check to see if the board failed any self tests.
1227 */
1228 status = src_readl(dev, MUnit.OMR);
1229 if (status & SELF_TEST_FAILED) {
1230 printk(KERN_ERR "%s%d: adapter self-test failed.\n", dev->name, instance);
1231 goto error_iounmap;
1232 }
1233 /*
1234 * Check to see if the monitor panic'd while booting.
1235 */
1236 if (status & MONITOR_PANIC) {
1237 printk(KERN_ERR "%s%d: adapter monitor panic.\n", dev->name, instance);
1238 goto error_iounmap;
1239 }
1240
1241 start = jiffies;
1242 /*
1243 * Wait for the adapter to be up and running. Wait up to 3 minutes
1244 */
1245 do {
1246 status = src_readl(dev, MUnit.OMR);
1247 if (status == INVALID_OMR)
1248 status = 0;
1249
1250 if ((restart &&
1251 (status & (KERNEL_PANIC|SELF_TEST_FAILED|MONITOR_PANIC))) ||
1252 time_after(jiffies, start+HZ*startup_timeout)) {
1253 printk(KERN_ERR "%s%d: adapter kernel failed to start, init status = %lx.\n",
1254 dev->name, instance, status);
1255 goto error_iounmap;
1256 }
1257 if (!restart &&
1258 ((status & (KERNEL_PANIC|SELF_TEST_FAILED|MONITOR_PANIC)) ||
1259 time_after(jiffies, start + HZ *
1260 ((startup_timeout > 60)
1261 ? (startup_timeout - 60)
1262 : (startup_timeout / 2))))) {
1263 if (likely(!aac_src_restart_adapter(dev,
1264 aac_src_check_health(dev), IOP_HWSOFT_RESET)))
1265 start = jiffies;
1266 ++restart;
1267 }
1268 msleep(1);
1269 } while (!(status & KERNEL_UP_AND_RUNNING));
1270
1271 if (restart && aac_commit)
1272 aac_commit = 1;
1273 /*
1274 * Fill in the common function dispatch table.
1275 */
1276 dev->a_ops.adapter_interrupt = aac_src_interrupt_adapter;
1277 dev->a_ops.adapter_disable_int = aac_src_disable_interrupt;
1278 dev->a_ops.adapter_enable_int = aac_src_disable_interrupt;
1279 dev->a_ops.adapter_notify = aac_src_notify_adapter;
1280 dev->a_ops.adapter_sync_cmd = src_sync_cmd;
1281 dev->a_ops.adapter_check_health = aac_src_check_health;
1282 dev->a_ops.adapter_restart = aac_src_restart_adapter;
1283 dev->a_ops.adapter_start = aac_src_start_adapter;
1284
1285 /*
1286 * First clear out all interrupts. Then enable the one's that we
1287 * can handle.
1288 */
1289 aac_adapter_comm(dev, AAC_COMM_MESSAGE);
1290 aac_adapter_disable_int(dev);
1291 src_writel(dev, MUnit.ODR_C, 0xffffffff);
1292 aac_adapter_enable_int(dev);
1293
1294 if (aac_init_adapter(dev) == NULL)
1295 goto error_iounmap;
1296 if ((dev->comm_interface != AAC_COMM_MESSAGE_TYPE2) &&
1297 (dev->comm_interface != AAC_COMM_MESSAGE_TYPE3))
1298 goto error_iounmap;
1299 if (dev->msi_enabled)
1300 aac_src_access_devreg(dev, AAC_ENABLE_MSIX);
1301
1302 if (aac_acquire_irq(dev))
1303 goto error_iounmap;
1304
1305 dev->dbg_base = pci_resource_start(dev->pdev, 2);
1306 dev->dbg_base_mapped = dev->regs.src.bar1;
1307 dev->dbg_size = AAC_MIN_SRCV_BAR1_SIZE;
1308 dev->a_ops.adapter_enable_int = aac_src_enable_interrupt_message;
1309
1310 aac_adapter_enable_int(dev);
1311
1312 if (!dev->sync_mode) {
1313 /*
1314 * Tell the adapter that all is configured, and it can
1315 * start accepting requests
1316 */
1317 aac_src_start_adapter(dev);
1318 }
1319 return 0;
1320
1321 error_iounmap:
1322
1323 return -1;
1324 }
1325
1326 void aac_src_access_devreg(struct aac_dev *dev, int mode)
1327 {
1328 u_int32_t val;
1329
1330 switch (mode) {
1331 case AAC_ENABLE_INTERRUPT:
1332 src_writel(dev,
1333 MUnit.OIMR,
1334 dev->OIMR = (dev->msi_enabled ?
1335 AAC_INT_ENABLE_TYPE1_MSIX :
1336 AAC_INT_ENABLE_TYPE1_INTX));
1337 break;
1338
1339 case AAC_DISABLE_INTERRUPT:
1340 src_writel(dev,
1341 MUnit.OIMR,
1342 dev->OIMR = AAC_INT_DISABLE_ALL);
1343 break;
1344
1345 case AAC_ENABLE_MSIX:
1346 /* set bit 6 */
1347 val = src_readl(dev, MUnit.IDR);
1348 val |= 0x40;
1349 src_writel(dev, MUnit.IDR, val);
1350 src_readl(dev, MUnit.IDR);
1351 /* unmask int. */
1352 val = PMC_ALL_INTERRUPT_BITS;
1353 src_writel(dev, MUnit.IOAR, val);
1354 val = src_readl(dev, MUnit.OIMR);
1355 src_writel(dev,
1356 MUnit.OIMR,
1357 val & (~(PMC_GLOBAL_INT_BIT2 | PMC_GLOBAL_INT_BIT0)));
1358 break;
1359
1360 case AAC_DISABLE_MSIX:
1361 /* reset bit 6 */
1362 val = src_readl(dev, MUnit.IDR);
1363 val &= ~0x40;
1364 src_writel(dev, MUnit.IDR, val);
1365 src_readl(dev, MUnit.IDR);
1366 break;
1367
1368 case AAC_CLEAR_AIF_BIT:
1369 /* set bit 5 */
1370 val = src_readl(dev, MUnit.IDR);
1371 val |= 0x20;
1372 src_writel(dev, MUnit.IDR, val);
1373 src_readl(dev, MUnit.IDR);
1374 break;
1375
1376 case AAC_CLEAR_SYNC_BIT:
1377 /* set bit 4 */
1378 val = src_readl(dev, MUnit.IDR);
1379 val |= 0x10;
1380 src_writel(dev, MUnit.IDR, val);
1381 src_readl(dev, MUnit.IDR);
1382 break;
1383
1384 case AAC_ENABLE_INTX:
1385 /* set bit 7 */
1386 val = src_readl(dev, MUnit.IDR);
1387 val |= 0x80;
1388 src_writel(dev, MUnit.IDR, val);
1389 src_readl(dev, MUnit.IDR);
1390 /* unmask int. */
1391 val = PMC_ALL_INTERRUPT_BITS;
1392 src_writel(dev, MUnit.IOAR, val);
1393 src_readl(dev, MUnit.IOAR);
1394 val = src_readl(dev, MUnit.OIMR);
1395 src_writel(dev, MUnit.OIMR,
1396 val & (~(PMC_GLOBAL_INT_BIT2)));
1397 break;
1398
1399 default:
1400 break;
1401 }
1402 }
1403
1404 static int aac_src_get_sync_status(struct aac_dev *dev)
1405 {
1406 int msix_val = 0;
1407 int legacy_val = 0;
1408
1409 msix_val = src_readl(dev, MUnit.ODR_MSI) & SRC_MSI_READ_MASK ? 1 : 0;
1410
1411 if (!dev->msi_enabled) {
1412 /*
1413 * if Legacy int status indicates cmd is not complete
1414 * sample MSIx register to see if it indiactes cmd complete,
1415 * if yes set the controller in MSIx mode and consider cmd
1416 * completed
1417 */
1418 legacy_val = src_readl(dev, MUnit.ODR_R) >> SRC_ODR_SHIFT;
1419 if (!(legacy_val & 1) && msix_val)
1420 dev->msi_enabled = 1;
1421 return legacy_val;
1422 }
1423
1424 return msix_val;
1425 }
Linux with added FPC-III support