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, 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_disable_interrupt - disable interrupt
86 * @dev: Which adapter to enable.
89 static void aac_sa_disable_interrupt (struct aac_dev *dev)
91 sa_writew(dev, SaDbCSR.PRISETIRQMASK, 0xffff);
95 * aac_sa_notify_adapter - handle adapter notification
96 * @dev: Adapter that notification is for
97 * @event: Event to notidy
99 * Notify the adapter of an event
102 static void aac_sa_notify_adapter(struct aac_dev *dev, u32 event)
107 sa_writew(dev, DoorbellReg_s,DOORBELL_1);
109 case HostNormRespNotFull:
110 sa_writew(dev, DoorbellReg_s,DOORBELL_4);
112 case AdapNormRespQue:
113 sa_writew(dev, DoorbellReg_s,DOORBELL_2);
115 case HostNormCmdNotFull:
116 sa_writew(dev, DoorbellReg_s,DOORBELL_3);
120 sa_sync_cmd(dev, HOST_CRASHING, 0, 0, 0, 0, 0, 0,
121 NULL, NULL, NULL, NULL, NULL);
125 sa_writew(dev, DoorbellReg_s,DOORBELL_6);
128 sa_writew(dev, DoorbellReg_s,DOORBELL_5);
138 * sa_sync_cmd - send a command and wait
140 * @command: Command to execute
141 * @p1: first parameter
142 * @ret: adapter status
144 * This routine will send a synchronous command to the adapter and wait
145 * for its completion.
148 static int sa_sync_cmd(struct aac_dev *dev, u32 command,
149 u32 p1, u32 p2, u32 p3, u32 p4, u32 p5, u32 p6,
150 u32 *ret, u32 *r1, u32 *r2, u32 *r3, u32 *r4)
155 * Write the Command into Mailbox 0
157 sa_writel(dev, Mailbox0, command);
159 * Write the parameters into Mailboxes 1 - 4
161 sa_writel(dev, Mailbox1, p1);
162 sa_writel(dev, Mailbox2, p2);
163 sa_writel(dev, Mailbox3, p3);
164 sa_writel(dev, Mailbox4, p4);
167 * Clear the synch command doorbell to start on a clean slate.
169 sa_writew(dev, DoorbellClrReg_p, DOORBELL_0);
171 * Signal that there is a new synch command
173 sa_writew(dev, DoorbellReg_s, DOORBELL_0);
178 while(time_before(jiffies, start+30*HZ))
181 * Delay 5uS so that the monitor gets access
185 * Mon110 will set doorbell0 bit when it has
186 * completed the command.
188 if(sa_readw(dev, DoorbellReg_p) & DOORBELL_0) {
192 schedule_timeout_uninterruptible(1);
198 * Clear the synch command doorbell.
200 sa_writew(dev, DoorbellClrReg_p, DOORBELL_0);
202 * Pull the synch status from Mailbox 0.
205 *ret = sa_readl(dev, Mailbox0);
207 *r1 = sa_readl(dev, Mailbox1);
209 *r2 = sa_readl(dev, Mailbox2);
211 *r3 = sa_readl(dev, Mailbox3);
213 *r4 = sa_readl(dev, Mailbox4);
218 * aac_sa_interrupt_adapter - interrupt an adapter
219 * @dev: Which adapter to enable.
221 * Breakpoint an adapter.
224 static void aac_sa_interrupt_adapter (struct aac_dev *dev)
226 sa_sync_cmd(dev, BREAKPOINT_REQUEST, 0, 0, 0, 0, 0, 0,
227 NULL, NULL, NULL, NULL, NULL);
231 * aac_sa_start_adapter - activate adapter
234 * Start up processing on an ARM based AAC adapter
237 static void aac_sa_start_adapter(struct aac_dev *dev)
239 struct aac_init *init;
241 * Fill in the remaining pieces of the init.
244 init->HostElapsedSeconds = cpu_to_le32(get_seconds());
245 /* We can only use a 32 bit address here */
246 sa_sync_cmd(dev, INIT_STRUCT_BASE_ADDRESS,
247 (u32)(ulong)dev->init_pa, 0, 0, 0, 0, 0,
248 NULL, NULL, NULL, NULL, NULL);
252 * aac_sa_check_health
253 * @dev: device to check if healthy
255 * Will attempt to determine if the specified adapter is alive and
256 * capable of handling requests, returning 0 if alive.
258 static int aac_sa_check_health(struct aac_dev *dev)
260 long status = sa_readl(dev, Mailbox7);
263 * Check to see if the board failed any self tests.
265 if (status & SELF_TEST_FAILED)
268 * Check to see if the board panic'd while booting.
270 if (status & KERNEL_PANIC)
273 * Wait for the adapter to be up and running. Wait up to 3 minutes
275 if (!(status & KERNEL_UP_AND_RUNNING))
284 * aac_sa_init - initialize an ARM based AAC card
285 * @dev: device to configure
287 * Allocate and set up resources for the ARM based AAC variants. The
288 * device_interface in the commregion will be allocated and linked
289 * to the comm region.
292 int aac_sa_init(struct aac_dev *dev)
295 unsigned long status;
303 * Check to see if the board failed any self tests.
305 if (sa_readl(dev, Mailbox7) & SELF_TEST_FAILED) {
306 printk(KERN_WARNING "%s%d: adapter self-test failed.\n", name, instance);
310 * Check to see if the board panic'd while booting.
312 if (sa_readl(dev, Mailbox7) & KERNEL_PANIC) {
313 printk(KERN_WARNING "%s%d: adapter kernel panic'd.\n", name, instance);
318 * Wait for the adapter to be up and running. Wait up to 3 minutes.
320 while (!(sa_readl(dev, Mailbox7) & KERNEL_UP_AND_RUNNING)) {
321 if (time_after(jiffies, start+180*HZ)) {
322 status = sa_readl(dev, Mailbox7);
323 printk(KERN_WARNING "%s%d: adapter kernel failed to start, init status = %lx.\n",
324 name, instance, status);
327 schedule_timeout_uninterruptible(1);
330 if (request_irq(dev->scsi_host_ptr->irq, aac_sa_intr, SA_SHIRQ|SA_INTERRUPT, "aacraid", (void *)dev ) < 0) {
331 printk(KERN_WARNING "%s%d: Interrupt unavailable.\n", name, instance);
336 * Fill in the function dispatch table.
339 dev->a_ops.adapter_interrupt = aac_sa_interrupt_adapter;
340 dev->a_ops.adapter_disable_int = aac_sa_disable_interrupt;
341 dev->a_ops.adapter_notify = aac_sa_notify_adapter;
342 dev->a_ops.adapter_sync_cmd = sa_sync_cmd;
343 dev->a_ops.adapter_check_health = aac_sa_check_health;
346 * First clear out all interrupts. Then enable the one's that
349 sa_writew(dev, SaDbCSR.PRISETIRQMASK, 0xffff);
350 sa_writew(dev, SaDbCSR.PRICLEARIRQMASK, (PrintfReady | DOORBELL_1 |
351 DOORBELL_2 | DOORBELL_3 | DOORBELL_4));
353 if(aac_init_adapter(dev) == NULL)
357 * Tell the adapter that all is configure, and it can start
360 aac_sa_start_adapter(dev);
364 sa_writew(dev, SaDbCSR.PRISETIRQMASK, 0xffff);
365 free_irq(dev->scsi_host_ptr->irq, (void *)dev);