2 * Adaptec AAC series RAID controller driver
3 * (c) Copyright 2001 Red Hat Inc. <alan@redhat.com>
5 * based on the old aacraid driver that is..
6 * Adaptec aacraid device driver for Linux.
8 * Copyright (c) 2000 Adaptec, Inc. (aacraid@adaptec.com)
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2, or (at your option)
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; see the file COPYING. If not, write to
22 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
27 * Abstract: Hardware miniport for Drawbridge specific hardware functions.
31 #include <linux/kernel.h>
32 #include <linux/init.h>
33 #include <linux/types.h>
34 #include <linux/pci.h>
35 #include <linux/spinlock.h>
36 #include <linux/slab.h>
37 #include <linux/blkdev.h>
38 #include <linux/delay.h>
39 #include <linux/completion.h>
40 #include <linux/time.h>
41 #include <linux/interrupt.h>
42 #include <asm/semaphore.h>
44 #include <scsi/scsi_host.h>
48 static irqreturn_t aac_rx_intr_producer(int irq, void *dev_id)
50 struct aac_dev *dev = dev_id;
51 unsigned long bellbits;
52 u8 intstat = rx_readb(dev, MUnit.OISR);
55 * Read mask and invert because drawbridge is reversed.
56 * This allows us to only service interrupts that have
58 * Check to see if this is our interrupt. If it isn't just return
60 if (intstat & ~(dev->OIMR)) {
61 bellbits = rx_readl(dev, OutboundDoorbellReg);
62 if (bellbits & DoorBellPrintfReady) {
63 aac_printf(dev, readl (&dev->IndexRegs->Mailbox[5]));
64 rx_writel(dev, MUnit.ODR,DoorBellPrintfReady);
65 rx_writel(dev, InboundDoorbellReg,DoorBellPrintfDone);
67 else if (bellbits & DoorBellAdapterNormCmdReady) {
68 rx_writel(dev, MUnit.ODR, DoorBellAdapterNormCmdReady);
69 aac_command_normal(&dev->queues->queue[HostNormCmdQueue]);
71 else if (bellbits & DoorBellAdapterNormRespReady) {
72 rx_writel(dev, MUnit.ODR,DoorBellAdapterNormRespReady);
73 aac_response_normal(&dev->queues->queue[HostNormRespQueue]);
75 else if (bellbits & DoorBellAdapterNormCmdNotFull) {
76 rx_writel(dev, MUnit.ODR, DoorBellAdapterNormCmdNotFull);
78 else if (bellbits & DoorBellAdapterNormRespNotFull) {
79 rx_writel(dev, MUnit.ODR, DoorBellAdapterNormCmdNotFull);
80 rx_writel(dev, MUnit.ODR, DoorBellAdapterNormRespNotFull);
87 static irqreturn_t aac_rx_intr_message(int irq, void *dev_id)
89 struct aac_dev *dev = dev_id;
90 u32 Index = rx_readl(dev, MUnit.OutboundQueue);
91 if (Index == 0xFFFFFFFFL)
92 Index = rx_readl(dev, MUnit.OutboundQueue);
93 if (Index != 0xFFFFFFFFL) {
95 if (aac_intr_normal(dev, Index)) {
96 rx_writel(dev, MUnit.OutboundQueue, Index);
97 rx_writel(dev, MUnit.ODR, DoorBellAdapterNormRespReady);
99 Index = rx_readl(dev, MUnit.OutboundQueue);
100 } while (Index != 0xFFFFFFFFL);
107 * aac_rx_disable_interrupt - Disable interrupts
111 static void aac_rx_disable_interrupt(struct aac_dev *dev)
113 rx_writeb(dev, MUnit.OIMR, dev->OIMR = 0xff);
117 * aac_rx_enable_interrupt_producer - Enable interrupts
121 static void aac_rx_enable_interrupt_producer(struct aac_dev *dev)
123 rx_writeb(dev, MUnit.OIMR, dev->OIMR = 0xfb);
127 * aac_rx_enable_interrupt_message - Enable interrupts
131 static void aac_rx_enable_interrupt_message(struct aac_dev *dev)
133 rx_writeb(dev, MUnit.OIMR, dev->OIMR = 0xf7);
137 * rx_sync_cmd - send a command and wait
139 * @command: Command to execute
140 * @p1: first parameter
141 * @ret: adapter status
143 * This routine will send a synchronous command to the adapter and wait
144 * for its completion.
147 static int rx_sync_cmd(struct aac_dev *dev, u32 command,
148 u32 p1, u32 p2, u32 p3, u32 p4, u32 p5, u32 p6,
149 u32 *status, u32 * r1, u32 * r2, u32 * r3, u32 * r4)
154 * Write the command into Mailbox 0
156 writel(command, &dev->IndexRegs->Mailbox[0]);
158 * Write the parameters into Mailboxes 1 - 6
160 writel(p1, &dev->IndexRegs->Mailbox[1]);
161 writel(p2, &dev->IndexRegs->Mailbox[2]);
162 writel(p3, &dev->IndexRegs->Mailbox[3]);
163 writel(p4, &dev->IndexRegs->Mailbox[4]);
165 * Clear the synch command doorbell to start on a clean slate.
167 rx_writel(dev, OutboundDoorbellReg, OUTBOUNDDOORBELL_0);
169 * Disable doorbell interrupts
171 rx_writeb(dev, MUnit.OIMR, dev->OIMR = 0xff);
173 * Force the completion of the mask register write before issuing
176 rx_readb (dev, MUnit.OIMR);
178 * Signal that there is a new synch command
180 rx_writel(dev, InboundDoorbellReg, INBOUNDDOORBELL_0);
186 * Wait up to 30 seconds
188 while (time_before(jiffies, start+30*HZ))
190 udelay(5); /* Delay 5 microseconds to let Mon960 get info. */
192 * Mon960 will set doorbell0 bit when it has completed the command.
194 if (rx_readl(dev, OutboundDoorbellReg) & OUTBOUNDDOORBELL_0) {
196 * Clear the doorbell.
198 rx_writel(dev, OutboundDoorbellReg, OUTBOUNDDOORBELL_0);
203 * Yield the processor in case we are slow
209 * Restore interrupt mask even though we timed out
211 aac_adapter_enable_int(dev);
215 * Pull the synch status from Mailbox 0.
218 *status = readl(&dev->IndexRegs->Mailbox[0]);
220 *r1 = readl(&dev->IndexRegs->Mailbox[1]);
222 *r2 = readl(&dev->IndexRegs->Mailbox[2]);
224 *r3 = readl(&dev->IndexRegs->Mailbox[3]);
226 *r4 = readl(&dev->IndexRegs->Mailbox[4]);
228 * Clear the synch command doorbell.
230 rx_writel(dev, OutboundDoorbellReg, OUTBOUNDDOORBELL_0);
232 * Restore interrupt mask
234 aac_adapter_enable_int(dev);
240 * aac_rx_interrupt_adapter - interrupt adapter
243 * Send an interrupt to the i960 and breakpoint it.
246 static void aac_rx_interrupt_adapter(struct aac_dev *dev)
248 rx_sync_cmd(dev, BREAKPOINT_REQUEST, 0, 0, 0, 0, 0, 0, NULL, NULL, NULL, NULL, NULL);
252 * aac_rx_notify_adapter - send an event to the adapter
254 * @event: Event to send
256 * Notify the i960 that something it probably cares about has
260 static void aac_rx_notify_adapter(struct aac_dev *dev, u32 event)
265 rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_1);
267 case HostNormRespNotFull:
268 rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_4);
270 case AdapNormRespQue:
271 rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_2);
273 case HostNormCmdNotFull:
274 rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_3);
279 rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_6);
282 rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_5);
291 * aac_rx_start_adapter - activate adapter
294 * Start up processing on an i960 based AAC adapter
297 void aac_rx_start_adapter(struct aac_dev *dev)
299 struct aac_init *init;
302 init->HostElapsedSeconds = cpu_to_le32(get_seconds());
303 // We can only use a 32 bit address here
304 rx_sync_cmd(dev, INIT_STRUCT_BASE_ADDRESS, (u32)(ulong)dev->init_pa,
305 0, 0, 0, 0, 0, NULL, NULL, NULL, NULL, NULL);
309 * aac_rx_check_health
310 * @dev: device to check if healthy
312 * Will attempt to determine if the specified adapter is alive and
313 * capable of handling requests, returning 0 if alive.
315 static int aac_rx_check_health(struct aac_dev *dev)
317 u32 status = rx_readl(dev, MUnit.OMRx[0]);
320 * Check to see if the board failed any self tests.
322 if (status & SELF_TEST_FAILED)
325 * Check to see if the board panic'd.
327 if (status & KERNEL_PANIC) {
333 dma_addr_t paddr, baddr;
336 if ((status & 0xFF000000L) == 0xBC000000L)
337 return (status >> 16) & 0xFF;
338 buffer = pci_alloc_consistent(dev->pdev, 512, &baddr);
342 post = pci_alloc_consistent(dev->pdev,
343 sizeof(struct POSTSTATUS), &paddr);
345 pci_free_consistent(dev->pdev, 512, buffer, baddr);
348 memset(buffer, 0, 512);
349 post->Post_Command = cpu_to_le32(COMMAND_POST_RESULTS);
350 post->Post_Address = cpu_to_le32(baddr);
351 rx_writel(dev, MUnit.IMRx[0], paddr);
352 rx_sync_cmd(dev, COMMAND_POST_RESULTS, baddr, 0, 0, 0, 0, 0,
353 NULL, NULL, NULL, NULL, NULL);
354 pci_free_consistent(dev->pdev, sizeof(struct POSTSTATUS),
356 if ((buffer[0] == '0') && ((buffer[1] == 'x') || (buffer[1] == 'X'))) {
357 ret = (buffer[2] <= '9') ? (buffer[2] - '0') : (buffer[2] - 'A' + 10);
359 ret += (buffer[3] <= '9') ? (buffer[3] - '0') : (buffer[3] - 'A' + 10);
361 pci_free_consistent(dev->pdev, 512, buffer, baddr);
365 * Wait for the adapter to be up and running.
367 if (!(status & KERNEL_UP_AND_RUNNING))
376 * aac_rx_deliver_producer
379 * Will send a fib, returning 0 if successful.
381 static int aac_rx_deliver_producer(struct fib * fib)
383 struct aac_dev *dev = fib->dev;
384 struct aac_queue *q = &dev->queues->queue[AdapNormCmdQueue];
385 unsigned long qflags;
387 unsigned long nointr = 0;
389 spin_lock_irqsave(q->lock, qflags);
390 aac_queue_get( dev, &Index, AdapNormCmdQueue, fib->hw_fib, 1, fib, &nointr);
393 *(q->headers.producer) = cpu_to_le32(Index + 1);
394 spin_unlock_irqrestore(q->lock, qflags);
395 if (!(nointr & aac_config.irq_mod))
396 aac_adapter_notify(dev, AdapNormCmdQueue);
402 * aac_rx_deliver_message
405 * Will send a fib, returning 0 if successful.
407 static int aac_rx_deliver_message(struct fib * fib)
409 struct aac_dev *dev = fib->dev;
410 struct aac_queue *q = &dev->queues->queue[AdapNormCmdQueue];
411 unsigned long qflags;
414 volatile void __iomem *device;
416 unsigned long count = 10000000L; /* 50 seconds */
417 spin_lock_irqsave(q->lock, qflags);
419 spin_unlock_irqrestore(q->lock, qflags);
421 Index = rx_readl(dev, MUnit.InboundQueue);
422 if (Index == 0xFFFFFFFFL)
423 Index = rx_readl(dev, MUnit.InboundQueue);
424 if (Index != 0xFFFFFFFFL)
427 spin_lock_irqsave(q->lock, qflags);
429 spin_unlock_irqrestore(q->lock, qflags);
434 device = dev->base + Index;
435 addr = fib->hw_fib_pa;
436 writel((u32)(addr & 0xffffffff), device);
437 device += sizeof(u32);
438 writel((u32)(addr >> 32), device);
439 device += sizeof(u32);
440 writel(le16_to_cpu(fib->hw_fib->header.Size), device);
441 rx_writel(dev, MUnit.InboundQueue, Index);
447 * @size: mapping resize request
450 static int aac_rx_ioremap(struct aac_dev * dev, u32 size)
453 iounmap(dev->regs.rx);
456 dev->base = dev->regs.rx = ioremap(dev->scsi_host_ptr->base, size);
457 if (dev->base == NULL)
459 dev->IndexRegs = &dev->regs.rx->IndexRegs;
463 static int aac_rx_restart_adapter(struct aac_dev *dev)
467 printk(KERN_ERR "%s%d: adapter kernel panic'd.\n",
470 if (aac_rx_check_health(dev) <= 0)
472 if (rx_sync_cmd(dev, IOP_RESET, 0, 0, 0, 0, 0, 0,
473 &var, NULL, NULL, NULL, NULL))
475 if (var != 0x00000001)
477 if (rx_readl(dev, MUnit.OMRx[0]) & KERNEL_PANIC)
483 * aac_rx_select_comm - Select communications method
485 * @comm: communications method
488 int aac_rx_select_comm(struct aac_dev *dev, int comm)
491 case AAC_COMM_PRODUCER:
492 dev->a_ops.adapter_enable_int = aac_rx_enable_interrupt_producer;
493 dev->a_ops.adapter_intr = aac_rx_intr_producer;
494 dev->a_ops.adapter_deliver = aac_rx_deliver_producer;
496 case AAC_COMM_MESSAGE:
497 dev->a_ops.adapter_enable_int = aac_rx_enable_interrupt_message;
498 dev->a_ops.adapter_intr = aac_rx_intr_message;
499 dev->a_ops.adapter_deliver = aac_rx_deliver_message;
508 * aac_rx_init - initialize an i960 based AAC card
509 * @dev: device to configure
511 * Allocate and set up resources for the i960 based AAC variants. The
512 * device_interface in the commregion will be allocated and linked
513 * to the comm region.
516 int _aac_rx_init(struct aac_dev *dev)
519 unsigned long status;
526 if (aac_adapter_ioremap(dev, dev->base_size)) {
527 printk(KERN_WARNING "%s: unable to map adapter.\n", name);
532 * Check to see if the board panic'd while booting.
534 status = rx_readl(dev, MUnit.OMRx[0]);
535 if (status & KERNEL_PANIC)
536 if (aac_rx_restart_adapter(dev))
539 * Check to see if the board failed any self tests.
541 status = rx_readl(dev, MUnit.OMRx[0]);
542 if (status & SELF_TEST_FAILED) {
543 printk(KERN_ERR "%s%d: adapter self-test failed.\n", dev->name, instance);
547 * Check to see if the monitor panic'd while booting.
549 if (status & MONITOR_PANIC) {
550 printk(KERN_ERR "%s%d: adapter monitor panic.\n", dev->name, instance);
555 * Wait for the adapter to be up and running. Wait up to 3 minutes
557 while (!((status = rx_readl(dev, MUnit.OMRx[0])) & KERNEL_UP_AND_RUNNING))
559 if(time_after(jiffies, start+startup_timeout*HZ))
561 printk(KERN_ERR "%s%d: adapter kernel failed to start, init status = %lx.\n",
562 dev->name, instance, status);
568 * Fill in the common function dispatch table.
570 dev->a_ops.adapter_interrupt = aac_rx_interrupt_adapter;
571 dev->a_ops.adapter_disable_int = aac_rx_disable_interrupt;
572 dev->a_ops.adapter_notify = aac_rx_notify_adapter;
573 dev->a_ops.adapter_sync_cmd = rx_sync_cmd;
574 dev->a_ops.adapter_check_health = aac_rx_check_health;
577 * First clear out all interrupts. Then enable the one's that we
580 aac_adapter_comm(dev, AAC_COMM_PRODUCER);
581 aac_adapter_disable_int(dev);
582 rx_writel(dev, MUnit.ODR, 0xffffffff);
583 aac_adapter_enable_int(dev);
585 if (aac_init_adapter(dev) == NULL)
587 aac_adapter_comm(dev, dev->comm_interface);
588 if (request_irq(dev->scsi_host_ptr->irq, dev->a_ops.adapter_intr,
589 IRQF_SHARED|IRQF_DISABLED, "aacraid", dev) < 0) {
590 printk(KERN_ERR "%s%d: Interrupt unavailable.\n",
594 aac_adapter_enable_int(dev);
596 * Tell the adapter that all is configured, and it can
597 * start accepting requests
599 aac_rx_start_adapter(dev);
608 int aac_rx_init(struct aac_dev *dev)
611 * Fill in the function dispatch table.
613 dev->a_ops.adapter_ioremap = aac_rx_ioremap;
614 dev->a_ops.adapter_comm = aac_rx_select_comm;
616 return _aac_rx_init(dev);