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: Drawbridge specific support 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/time.h>
42 #include <linux/interrupt.h>
43 #include <asm/semaphore.h>
45 #include <scsi/scsi_host.h>
49 static irqreturn_t aac_sa_intr(int irq, void *dev_id, struct pt_regs *regs)
51 struct aac_dev *dev = dev_id;
52 unsigned short intstat, mask;
54 intstat = sa_readw(dev, DoorbellReg_p);
56 * Read mask and invert because drawbridge is reversed.
57 * This allows us to only service interrupts that have been enabled.
59 mask = ~(sa_readw(dev, SaDbCSR.PRISETIRQMASK));
61 /* Check to see if this is our interrupt. If it isn't just return */
64 if (intstat & PrintfReady) {
65 aac_printf(dev, le32_to_cpu(sa_readl(dev, Mailbox5)));
66 sa_writew(dev, DoorbellClrReg_p, PrintfReady); /* clear PrintfReady */
67 sa_writew(dev, DoorbellReg_s, PrintfDone);
68 } else if (intstat & DOORBELL_1) { // dev -> Host Normal Command Ready
69 aac_command_normal(&dev->queues->queue[HostNormCmdQueue]);
70 sa_writew(dev, DoorbellClrReg_p, DOORBELL_1);
71 } else if (intstat & DOORBELL_2) { // dev -> Host Normal Response Ready
72 aac_response_normal(&dev->queues->queue[HostNormRespQueue]);
73 sa_writew(dev, DoorbellClrReg_p, DOORBELL_2);
74 } else if (intstat & DOORBELL_3) { // dev -> Host Normal Command Not Full
75 sa_writew(dev, DoorbellClrReg_p, DOORBELL_3);
76 } else if (intstat & DOORBELL_4) { // dev -> Host Normal Response Not Full
77 sa_writew(dev, DoorbellClrReg_p, DOORBELL_4);
85 * aac_sa_enable_interrupt - enable an interrupt event
86 * @dev: Which adapter to enable.
87 * @event: Which adapter event.
89 * This routine will enable the corresponding adapter event to cause an interrupt on
93 void aac_sa_enable_interrupt(struct aac_dev *dev, u32 event)
98 sa_writew(dev, SaDbCSR.PRICLEARIRQMASK, DOORBELL_1);
101 case HostNormRespQue:
102 sa_writew(dev, SaDbCSR.PRICLEARIRQMASK, DOORBELL_2);
105 case AdapNormCmdNotFull:
106 sa_writew(dev, SaDbCSR.PRICLEARIRQMASK, DOORBELL_3);
109 case AdapNormRespNotFull:
110 sa_writew(dev, SaDbCSR.PRICLEARIRQMASK, DOORBELL_4);
116 * aac_sa_disable_interrupt - disable an interrupt event
117 * @dev: Which adapter to enable.
118 * @event: Which adapter event.
120 * This routine will enable the corresponding adapter event to cause an interrupt on
124 void aac_sa_disable_interrupt (struct aac_dev *dev, u32 event)
129 sa_writew(dev, SaDbCSR.PRISETIRQMASK, DOORBELL_1);
132 case HostNormRespQue:
133 sa_writew(dev, SaDbCSR.PRISETIRQMASK, DOORBELL_2);
136 case AdapNormCmdNotFull:
137 sa_writew(dev, SaDbCSR.PRISETIRQMASK, DOORBELL_3);
140 case AdapNormRespNotFull:
141 sa_writew(dev, SaDbCSR.PRISETIRQMASK, DOORBELL_4);
147 * aac_sa_notify_adapter - handle adapter notification
148 * @dev: Adapter that notification is for
149 * @event: Event to notidy
151 * Notify the adapter of an event
154 void aac_sa_notify_adapter(struct aac_dev *dev, u32 event)
159 sa_writew(dev, DoorbellReg_s,DOORBELL_1);
161 case HostNormRespNotFull:
162 sa_writew(dev, DoorbellReg_s,DOORBELL_4);
164 case AdapNormRespQue:
165 sa_writew(dev, DoorbellReg_s,DOORBELL_2);
167 case HostNormCmdNotFull:
168 sa_writew(dev, DoorbellReg_s,DOORBELL_3);
171 //sa_sync_cmd(dev, HOST_CRASHING, 0, &ret);
174 sa_writew(dev, DoorbellReg_s,DOORBELL_6);
177 sa_writew(dev, DoorbellReg_s,DOORBELL_5);
187 * sa_sync_cmd - send a command and wait
189 * @command: Command to execute
190 * @p1: first parameter
191 * @ret: adapter status
193 * This routine will send a synchronous comamnd to the adapter and wait
194 * for its completion.
197 static int sa_sync_cmd(struct aac_dev *dev, u32 command, u32 p1, u32 *ret)
202 * Write the Command into Mailbox 0
204 sa_writel(dev, Mailbox0, cpu_to_le32(command));
206 * Write the parameters into Mailboxes 1 - 4
208 sa_writel(dev, Mailbox1, cpu_to_le32(p1));
209 sa_writel(dev, Mailbox2, 0);
210 sa_writel(dev, Mailbox3, 0);
211 sa_writel(dev, Mailbox4, 0);
213 * Clear the synch command doorbell to start on a clean slate.
215 sa_writew(dev, DoorbellClrReg_p, DOORBELL_0);
217 * Signal that there is a new synch command
219 sa_writew(dev, DoorbellReg_s, DOORBELL_0);
224 while(time_before(jiffies, start+30*HZ))
227 * Delay 5uS so that the monitor gets access
231 * Mon110 will set doorbell0 bit when it has
232 * completed the command.
234 if(sa_readw(dev, DoorbellReg_p) & DOORBELL_0) {
238 set_current_state(TASK_UNINTERRUPTIBLE);
245 * Clear the synch command doorbell.
247 sa_writew(dev, DoorbellClrReg_p, DOORBELL_0);
249 * Pull the synch status from Mailbox 0.
251 *ret = le32_to_cpu(sa_readl(dev, Mailbox0));
256 * aac_sa_interrupt_adapter - interrupt an adapter
257 * @dev: Which adapter to enable.
259 * Breakpoint an adapter.
262 static void aac_sa_interrupt_adapter (struct aac_dev *dev)
265 sa_sync_cmd(dev, BREAKPOINT_REQUEST, 0, &ret);
269 * aac_sa_start_adapter - activate adapter
272 * Start up processing on an ARM based AAC adapter
275 static void aac_sa_start_adapter(struct aac_dev *dev)
278 struct aac_init *init;
280 * Fill in the remaining pieces of the init.
283 init->HostElapsedSeconds = cpu_to_le32(jiffies/HZ);
287 * Tell the adapter we are back and up and running so it will scan its command
288 * queues and enable our interrupts
290 dev->irq_mask = (PrintfReady | DOORBELL_1 | DOORBELL_2 | DOORBELL_3 | DOORBELL_4);
292 * First clear out all interrupts. Then enable the one's that
296 sa_writew(dev, SaDbCSR.PRISETIRQMASK, cpu_to_le16(0xffff));
297 sa_writew(dev, SaDbCSR.PRICLEARIRQMASK, (PrintfReady | DOORBELL_1 | DOORBELL_2 | DOORBELL_3 | DOORBELL_4));
298 dprintk(("SYNCCMD\n"));
299 /* We can only use a 32 bit address here */
300 sa_sync_cmd(dev, INIT_STRUCT_BASE_ADDRESS, (u32)(ulong)dev->init_pa, &ret);
304 * aac_sa_check_health
305 * @dev: device to check if healthy
307 * Will attempt to determine if the specified adapter is alive and
308 * capable of handling requests, returning 0 if alive.
310 static int aac_sa_check_health(struct aac_dev *dev)
312 long status = sa_readl(dev, Mailbox7);
315 * Check to see if the board failed any self tests.
317 if (status & SELF_TEST_FAILED)
320 * Check to see if the board panic'd while booting.
322 if (status & KERNEL_PANIC)
325 * Wait for the adapter to be up and running. Wait up to 3 minutes
327 if (!(status & KERNEL_UP_AND_RUNNING))
336 * aac_sa_init - initialize an ARM based AAC card
337 * @dev: device to configure
339 * Allocate and set up resources for the ARM based AAC variants. The
340 * device_interface in the commregion will be allocated and linked
341 * to the comm region.
344 int aac_sa_init(struct aac_dev *dev)
347 unsigned long status;
351 dprintk(("PREINST\n"));
356 * Map in the registers from the adapter.
358 dprintk(("PREMAP\n"));
360 if((dev->regs.sa = (struct sa_registers *)ioremap((unsigned long)dev->scsi_host_ptr->base, 8192))==NULL)
362 printk(KERN_WARNING "aacraid: unable to map ARM.\n" );
366 * Check to see if the board failed any self tests.
368 if (sa_readl(dev, Mailbox7) & SELF_TEST_FAILED) {
369 printk(KERN_WARNING "%s%d: adapter self-test failed.\n", name, instance);
373 * Check to see if the board panic'd while booting.
375 if (sa_readl(dev, Mailbox7) & KERNEL_PANIC) {
376 printk(KERN_WARNING "%s%d: adapter kernel panic'd.\n", name, instance);
381 * Wait for the adapter to be up and running. Wait up to 3 minutes.
383 while (!(sa_readl(dev, Mailbox7) & KERNEL_UP_AND_RUNNING)) {
384 if (time_after(jiffies, start+180*HZ)) {
385 status = sa_readl(dev, Mailbox7) >> 16;
386 printk(KERN_WARNING "%s%d: adapter kernel failed to start, init status = %d.\n", name, instance, le32_to_cpu(status));
389 set_current_state(TASK_UNINTERRUPTIBLE);
393 dprintk(("ATIRQ\n"));
394 if (request_irq(dev->scsi_host_ptr->irq, aac_sa_intr, SA_SHIRQ|SA_INTERRUPT, "aacraid", (void *)dev ) < 0) {
395 printk(KERN_WARNING "%s%d: Interrupt unavailable.\n", name, instance);
400 * Fill in the function dispatch table.
403 dev->a_ops.adapter_interrupt = aac_sa_interrupt_adapter;
404 dev->a_ops.adapter_enable_int = aac_sa_enable_interrupt;
405 dev->a_ops.adapter_disable_int = aac_sa_disable_interrupt;
406 dev->a_ops.adapter_notify = aac_sa_notify_adapter;
407 dev->a_ops.adapter_sync_cmd = sa_sync_cmd;
408 dev->a_ops.adapter_check_health = aac_sa_check_health;
410 dprintk(("FUNCDONE\n"));
412 if(aac_init_adapter(dev) == NULL)
415 dprintk(("NEWADAPTDONE\n"));
417 * Start any kernel threads needed
419 dev->thread_pid = kernel_thread((int (*)(void *))aac_command_thread, dev, 0);
420 if (dev->thread_pid < 0) {
421 printk(KERN_ERR "aacraid: Unable to create command thread.\n");
426 * Tell the adapter that all is configure, and it can start
429 dprintk(("STARTING\n"));
430 aac_sa_start_adapter(dev);
431 dprintk(("STARTED\n"));
439 free_irq(dev->scsi_host_ptr->irq, (void *)dev);
442 iounmap(dev->regs.sa);