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/sched.h>
35 #include <linux/pci.h>
36 #include <linux/spinlock.h>
37 #include <linux/slab.h>
38 #include <linux/blkdev.h>
39 #include <linux/delay.h>
40 #include <linux/completion.h>
41 #include <linux/interrupt.h>
42 #include <asm/semaphore.h>
44 #include <scsi/scsi_host.h>
48 static irqreturn_t aac_rkt_intr(int irq, void *dev_id, struct pt_regs *regs)
50 struct aac_dev *dev = dev_id;
51 unsigned long bellbits;
53 intstat = rkt_readb(dev, MUnit.OISR);
55 * Read mask and invert because drawbridge is reversed.
56 * This allows us to only service interrupts that have
60 /* Check to see if this is our interrupt. If it isn't just return */
63 bellbits = rkt_readl(dev, OutboundDoorbellReg);
64 if (bellbits & DoorBellPrintfReady) {
65 aac_printf(dev, le32_to_cpu(rkt_readl (dev, IndexRegs.Mailbox[5])));
66 rkt_writel(dev, MUnit.ODR,DoorBellPrintfReady);
67 rkt_writel(dev, InboundDoorbellReg,DoorBellPrintfDone);
69 else if (bellbits & DoorBellAdapterNormCmdReady) {
70 aac_command_normal(&dev->queues->queue[HostNormCmdQueue]);
71 rkt_writel(dev, MUnit.ODR, DoorBellAdapterNormCmdReady);
73 else if (bellbits & DoorBellAdapterNormRespReady) {
74 aac_response_normal(&dev->queues->queue[HostNormRespQueue]);
75 rkt_writel(dev, MUnit.ODR,DoorBellAdapterNormRespReady);
77 else if (bellbits & DoorBellAdapterNormCmdNotFull) {
78 rkt_writel(dev, MUnit.ODR, DoorBellAdapterNormCmdNotFull);
80 else if (bellbits & DoorBellAdapterNormRespNotFull) {
81 rkt_writel(dev, MUnit.ODR, DoorBellAdapterNormCmdNotFull);
82 rkt_writel(dev, MUnit.ODR, DoorBellAdapterNormRespNotFull);
90 * aac_rkt_enable_interrupt - Enable event reporting
92 * @event: Event to enable
94 * Enable event reporting from the i960 for a given event.
97 static void aac_rkt_enable_interrupt(struct aac_dev * dev, u32 event)
102 dev->irq_mask &= ~(OUTBOUNDDOORBELL_1);
105 case HostNormRespQue:
106 dev->irq_mask &= ~(OUTBOUNDDOORBELL_2);
109 case AdapNormCmdNotFull:
110 dev->irq_mask &= ~(OUTBOUNDDOORBELL_3);
113 case AdapNormRespNotFull:
114 dev->irq_mask &= ~(OUTBOUNDDOORBELL_4);
120 * aac_rkt_disable_interrupt - Disable event reporting
122 * @event: Event to enable
124 * Disable event reporting from the i960 for a given event.
127 static void aac_rkt_disable_interrupt(struct aac_dev *dev, u32 event)
132 dev->irq_mask |= (OUTBOUNDDOORBELL_1);
135 case HostNormRespQue:
136 dev->irq_mask |= (OUTBOUNDDOORBELL_2);
139 case AdapNormCmdNotFull:
140 dev->irq_mask |= (OUTBOUNDDOORBELL_3);
143 case AdapNormRespNotFull:
144 dev->irq_mask |= (OUTBOUNDDOORBELL_4);
150 * rkt_sync_cmd - send a command and wait
152 * @command: Command to execute
153 * @p1: first parameter
154 * @ret: adapter status
156 * This routine will send a synchronous comamnd to the adapter and wait
157 * for its completion.
160 static int rkt_sync_cmd(struct aac_dev *dev, u32 command, u32 p1, u32 *status)
165 * Write the command into Mailbox 0
167 rkt_writel(dev, InboundMailbox0, cpu_to_le32(command));
169 * Write the parameters into Mailboxes 1 - 4
171 rkt_writel(dev, InboundMailbox1, cpu_to_le32(p1));
172 rkt_writel(dev, InboundMailbox2, 0);
173 rkt_writel(dev, InboundMailbox3, 0);
174 rkt_writel(dev, InboundMailbox4, 0);
176 * Clear the synch command doorbell to start on a clean slate.
178 rkt_writel(dev, OutboundDoorbellReg, OUTBOUNDDOORBELL_0);
180 * Disable doorbell interrupts
182 rkt_writeb(dev, MUnit.OIMR, dev->OIMR |= 0x04);
184 * Force the completion of the mask register write before issuing
187 rkt_readb (dev, MUnit.OIMR);
189 * Signal that there is a new synch command
191 rkt_writel(dev, InboundDoorbellReg, INBOUNDDOORBELL_0);
197 * Wait up to 30 seconds
199 while (time_before(jiffies, start+30*HZ))
201 udelay(5); /* Delay 5 microseconds to let Mon960 get info. */
203 * Mon960 will set doorbell0 bit when it has completed the command.
205 if (rkt_readl(dev, OutboundDoorbellReg) & OUTBOUNDDOORBELL_0) {
207 * Clear the doorbell.
209 rkt_writel(dev, OutboundDoorbellReg, OUTBOUNDDOORBELL_0);
214 * Yield the processor in case we are slow
216 set_current_state(TASK_UNINTERRUPTIBLE);
221 * Restore interrupt mask even though we timed out
223 rkt_writeb(dev, MUnit.OIMR, dev->OIMR &= 0xfb);
227 * Pull the synch status from Mailbox 0.
229 *status = le32_to_cpu(rkt_readl(dev, IndexRegs.Mailbox[0]));
231 * Clear the synch command doorbell.
233 rkt_writel(dev, OutboundDoorbellReg, OUTBOUNDDOORBELL_0);
235 * Restore interrupt mask
237 rkt_writeb(dev, MUnit.OIMR, dev->OIMR &= 0xfb);
243 * aac_rkt_interrupt_adapter - interrupt adapter
246 * Send an interrupt to the i960 and breakpoint it.
249 static void aac_rkt_interrupt_adapter(struct aac_dev *dev)
252 rkt_sync_cmd(dev, BREAKPOINT_REQUEST, 0, &ret);
256 * aac_rkt_notify_adapter - send an event to the adapter
258 * @event: Event to send
260 * Notify the i960 that something it probably cares about has
264 static void aac_rkt_notify_adapter(struct aac_dev *dev, u32 event)
269 rkt_writel(dev, MUnit.IDR,INBOUNDDOORBELL_1);
271 case HostNormRespNotFull:
272 rkt_writel(dev, MUnit.IDR,INBOUNDDOORBELL_4);
274 case AdapNormRespQue:
275 rkt_writel(dev, MUnit.IDR,INBOUNDDOORBELL_2);
277 case HostNormCmdNotFull:
278 rkt_writel(dev, MUnit.IDR,INBOUNDDOORBELL_3);
281 // rkt_sync_cmd(dev, HOST_CRASHING, 0, 0, 0, 0, &ret);
284 rkt_writel(dev, MUnit.IDR,INBOUNDDOORBELL_6);
287 rkt_writel(dev, MUnit.IDR,INBOUNDDOORBELL_5);
296 * aac_rkt_start_adapter - activate adapter
299 * Start up processing on an i960 based AAC adapter
302 static void aac_rkt_start_adapter(struct aac_dev *dev)
305 struct aac_init *init;
308 init->HostElapsedSeconds = cpu_to_le32(jiffies/HZ);
310 * Tell the adapter we are back and up and running so it will scan
311 * its command queues and enable our interrupts
313 dev->irq_mask = (DoorBellPrintfReady | OUTBOUNDDOORBELL_1 | OUTBOUNDDOORBELL_2 | OUTBOUNDDOORBELL_3 | OUTBOUNDDOORBELL_4);
315 * First clear out all interrupts. Then enable the one's that we
318 rkt_writeb(dev, MUnit.OIMR, 0xff);
319 rkt_writel(dev, MUnit.ODR, 0xffffffff);
320 // rkt_writeb(dev, MUnit.OIMR, ~(u8)OUTBOUND_DOORBELL_INTERRUPT_MASK);
321 rkt_writeb(dev, MUnit.OIMR, dev->OIMR = 0xfb);
323 // We can only use a 32 bit address here
324 rkt_sync_cmd(dev, INIT_STRUCT_BASE_ADDRESS, (u32)(ulong)dev->init_pa, &status);
328 * aac_rkt_check_health
329 * @dev: device to check if healthy
331 * Will attempt to determine if the specified adapter is alive and
332 * capable of handling requests, returning 0 if alive.
334 static int aac_rkt_check_health(struct aac_dev *dev)
336 long status = rkt_readl(dev, IndexRegs.Mailbox[7]);
339 * Check to see if the board failed any self tests.
341 if (status & SELF_TEST_FAILED)
344 * Check to see if the board panic'd while booting.
346 if (status & KERNEL_PANIC)
349 * Wait for the adapter to be up and running. Wait up to 3 minutes
351 if (!(status & KERNEL_UP_AND_RUNNING))
357 } /* aac_rkt_check_health */
360 * aac_rkt_init - initialize an i960 based AAC card
361 * @dev: device to configure
362 * @devnum: adapter number
364 * Allocate and set up resources for the i960 based AAC variants. The
365 * device_interface in the commregion will be allocated and linked
366 * to the comm region.
369 int aac_rkt_init(struct aac_dev *dev, unsigned long num)
372 unsigned long status;
381 * Map in the registers from the adapter.
383 if((dev->regs.rkt = (struct rkt_registers *)ioremap((unsigned long)dev->scsi_host_ptr->base, 8192))==NULL)
385 printk(KERN_WARNING "aacraid: unable to map i960.\n" );
389 * Check to see if the board failed any self tests.
391 if (rkt_readl(dev, IndexRegs.Mailbox[7]) & SELF_TEST_FAILED) {
392 printk(KERN_ERR "%s%d: adapter self-test failed.\n", dev->name, instance);
396 * Check to see if the board panic'd while booting.
398 if (rkt_readl(dev, IndexRegs.Mailbox[7]) & KERNEL_PANIC) {
399 printk(KERN_ERR "%s%d: adapter kernel panic'd.\n", dev->name, instance);
404 * Wait for the adapter to be up and running. Wait up to 3 minutes
406 while (!(rkt_readl(dev, IndexRegs.Mailbox[7]) & KERNEL_UP_AND_RUNNING))
408 if(time_after(jiffies, start+180*HZ))
410 status = rkt_readl(dev, IndexRegs.Mailbox[7]) >> 16;
411 printk(KERN_ERR "%s%d: adapter kernel failed to start, init status = %ld.\n", dev->name, instance, status);
414 set_current_state(TASK_UNINTERRUPTIBLE);
417 if (request_irq(dev->scsi_host_ptr->irq, aac_rkt_intr, SA_SHIRQ|SA_INTERRUPT, "aacraid", (void *)dev)<0)
419 printk(KERN_ERR "%s%d: Interrupt unavailable.\n", name, instance);
423 * Fill in the function dispatch table.
425 dev->a_ops.adapter_interrupt = aac_rkt_interrupt_adapter;
426 dev->a_ops.adapter_enable_int = aac_rkt_enable_interrupt;
427 dev->a_ops.adapter_disable_int = aac_rkt_disable_interrupt;
428 dev->a_ops.adapter_notify = aac_rkt_notify_adapter;
429 dev->a_ops.adapter_sync_cmd = rkt_sync_cmd;
430 dev->a_ops.adapter_check_health = aac_rkt_check_health;
432 if (aac_init_adapter(dev) == NULL)
435 * Start any kernel threads needed
437 dev->thread_pid = kernel_thread((int (*)(void *))aac_command_thread, dev, 0);
438 if(dev->thread_pid < 0)
440 printk(KERN_ERR "aacraid: Unable to create rkt thread.\n");
444 * Tell the adapter that all is configured, and it can start
447 aac_rkt_start_adapter(dev);