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) 2000-2007 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/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_sa_intr(int irq, void *dev_id)
50 struct aac_dev *dev = dev_id;
51 unsigned short intstat, mask;
53 intstat = sa_readw(dev, DoorbellReg_p);
55 * Read mask and invert because drawbridge is reversed.
56 * This allows us to only service interrupts that have been enabled.
58 mask = ~(sa_readw(dev, SaDbCSR.PRISETIRQMASK));
60 /* Check to see if this is our interrupt. If it isn't just return */
63 if (intstat & PrintfReady) {
64 aac_printf(dev, sa_readl(dev, Mailbox5));
65 sa_writew(dev, DoorbellClrReg_p, PrintfReady); /* clear PrintfReady */
66 sa_writew(dev, DoorbellReg_s, PrintfDone);
67 } else if (intstat & DOORBELL_1) { // dev -> Host Normal Command Ready
68 sa_writew(dev, DoorbellClrReg_p, DOORBELL_1);
69 aac_command_normal(&dev->queues->queue[HostNormCmdQueue]);
70 } else if (intstat & DOORBELL_2) { // dev -> Host Normal Response Ready
71 sa_writew(dev, DoorbellClrReg_p, DOORBELL_2);
72 aac_response_normal(&dev->queues->queue[HostNormRespQueue]);
73 } else if (intstat & DOORBELL_3) { // dev -> Host Normal Command Not Full
74 sa_writew(dev, DoorbellClrReg_p, DOORBELL_3);
75 } else if (intstat & DOORBELL_4) { // dev -> Host Normal Response Not Full
76 sa_writew(dev, DoorbellClrReg_p, DOORBELL_4);
84 * aac_sa_disable_interrupt - disable interrupt
85 * @dev: Which adapter to enable.
88 static void aac_sa_disable_interrupt (struct aac_dev *dev)
90 sa_writew(dev, SaDbCSR.PRISETIRQMASK, 0xffff);
94 * aac_sa_enable_interrupt - enable interrupt
95 * @dev: Which adapter to enable.
98 static void aac_sa_enable_interrupt (struct aac_dev *dev)
100 sa_writew(dev, SaDbCSR.PRICLEARIRQMASK, (PrintfReady | DOORBELL_1 |
101 DOORBELL_2 | DOORBELL_3 | DOORBELL_4));
105 * aac_sa_notify_adapter - handle adapter notification
106 * @dev: Adapter that notification is for
107 * @event: Event to notidy
109 * Notify the adapter of an event
112 static void aac_sa_notify_adapter(struct aac_dev *dev, u32 event)
117 sa_writew(dev, DoorbellReg_s,DOORBELL_1);
119 case HostNormRespNotFull:
120 sa_writew(dev, DoorbellReg_s,DOORBELL_4);
122 case AdapNormRespQue:
123 sa_writew(dev, DoorbellReg_s,DOORBELL_2);
125 case HostNormCmdNotFull:
126 sa_writew(dev, DoorbellReg_s,DOORBELL_3);
130 sa_sync_cmd(dev, HOST_CRASHING, 0, 0, 0, 0, 0, 0,
131 NULL, NULL, NULL, NULL, NULL);
135 sa_writew(dev, DoorbellReg_s,DOORBELL_6);
138 sa_writew(dev, DoorbellReg_s,DOORBELL_5);
148 * sa_sync_cmd - send a command and wait
150 * @command: Command to execute
151 * @p1: first parameter
152 * @ret: adapter status
154 * This routine will send a synchronous command to the adapter and wait
155 * for its completion.
158 static int sa_sync_cmd(struct aac_dev *dev, u32 command,
159 u32 p1, u32 p2, u32 p3, u32 p4, u32 p5, u32 p6,
160 u32 *ret, u32 *r1, u32 *r2, u32 *r3, u32 *r4)
165 * Write the Command into Mailbox 0
167 sa_writel(dev, Mailbox0, command);
169 * Write the parameters into Mailboxes 1 - 4
171 sa_writel(dev, Mailbox1, p1);
172 sa_writel(dev, Mailbox2, p2);
173 sa_writel(dev, Mailbox3, p3);
174 sa_writel(dev, Mailbox4, p4);
177 * Clear the synch command doorbell to start on a clean slate.
179 sa_writew(dev, DoorbellClrReg_p, DOORBELL_0);
181 * Signal that there is a new synch command
183 sa_writew(dev, DoorbellReg_s, DOORBELL_0);
188 while(time_before(jiffies, start+30*HZ))
191 * Delay 5uS so that the monitor gets access
195 * Mon110 will set doorbell0 bit when it has
196 * completed the command.
198 if(sa_readw(dev, DoorbellReg_p) & DOORBELL_0) {
208 * Clear the synch command doorbell.
210 sa_writew(dev, DoorbellClrReg_p, DOORBELL_0);
212 * Pull the synch status from Mailbox 0.
215 *ret = sa_readl(dev, Mailbox0);
217 *r1 = sa_readl(dev, Mailbox1);
219 *r2 = sa_readl(dev, Mailbox2);
221 *r3 = sa_readl(dev, Mailbox3);
223 *r4 = sa_readl(dev, Mailbox4);
228 * aac_sa_interrupt_adapter - interrupt an adapter
229 * @dev: Which adapter to enable.
231 * Breakpoint an adapter.
234 static void aac_sa_interrupt_adapter (struct aac_dev *dev)
236 sa_sync_cmd(dev, BREAKPOINT_REQUEST, 0, 0, 0, 0, 0, 0,
237 NULL, NULL, NULL, NULL, NULL);
241 * aac_sa_start_adapter - activate adapter
244 * Start up processing on an ARM based AAC adapter
247 static void aac_sa_start_adapter(struct aac_dev *dev)
249 struct aac_init *init;
251 * Fill in the remaining pieces of the init.
254 init->HostElapsedSeconds = cpu_to_le32(get_seconds());
255 /* We can only use a 32 bit address here */
256 sa_sync_cmd(dev, INIT_STRUCT_BASE_ADDRESS,
257 (u32)(ulong)dev->init_pa, 0, 0, 0, 0, 0,
258 NULL, NULL, NULL, NULL, NULL);
261 static int aac_sa_restart_adapter(struct aac_dev *dev, int bled)
267 * aac_sa_check_health
268 * @dev: device to check if healthy
270 * Will attempt to determine if the specified adapter is alive and
271 * capable of handling requests, returning 0 if alive.
273 static int aac_sa_check_health(struct aac_dev *dev)
275 long status = sa_readl(dev, Mailbox7);
278 * Check to see if the board failed any self tests.
280 if (status & SELF_TEST_FAILED)
283 * Check to see if the board panic'd while booting.
285 if (status & KERNEL_PANIC)
288 * Wait for the adapter to be up and running. Wait up to 3 minutes
290 if (!(status & KERNEL_UP_AND_RUNNING))
300 * @size: mapping resize request
303 static int aac_sa_ioremap(struct aac_dev * dev, u32 size)
306 iounmap(dev->regs.sa);
309 dev->base = dev->regs.sa = ioremap(dev->scsi_host_ptr->base, size);
310 return (dev->base == NULL) ? -1 : 0;
314 * aac_sa_init - initialize an ARM based AAC card
315 * @dev: device to configure
317 * Allocate and set up resources for the ARM based AAC variants. The
318 * device_interface in the commregion will be allocated and linked
319 * to the comm region.
322 int aac_sa_init(struct aac_dev *dev)
325 unsigned long status;
332 if (aac_sa_ioremap(dev, dev->base_size)) {
333 printk(KERN_WARNING "%s: unable to map adapter.\n", name);
338 * Check to see if the board failed any self tests.
340 if (sa_readl(dev, Mailbox7) & SELF_TEST_FAILED) {
341 printk(KERN_WARNING "%s%d: adapter self-test failed.\n", name, instance);
345 * Check to see if the board panic'd while booting.
347 if (sa_readl(dev, Mailbox7) & KERNEL_PANIC) {
348 printk(KERN_WARNING "%s%d: adapter kernel panic'd.\n", name, instance);
353 * Wait for the adapter to be up and running. Wait up to 3 minutes.
355 while (!(sa_readl(dev, Mailbox7) & KERNEL_UP_AND_RUNNING)) {
356 if (time_after(jiffies, start+startup_timeout*HZ)) {
357 status = sa_readl(dev, Mailbox7);
358 printk(KERN_WARNING "%s%d: adapter kernel failed to start, init status = %lx.\n",
359 name, instance, status);
366 * Fill in the function dispatch table.
369 dev->a_ops.adapter_interrupt = aac_sa_interrupt_adapter;
370 dev->a_ops.adapter_disable_int = aac_sa_disable_interrupt;
371 dev->a_ops.adapter_enable_int = aac_sa_enable_interrupt;
372 dev->a_ops.adapter_notify = aac_sa_notify_adapter;
373 dev->a_ops.adapter_sync_cmd = sa_sync_cmd;
374 dev->a_ops.adapter_check_health = aac_sa_check_health;
375 dev->a_ops.adapter_restart = aac_sa_restart_adapter;
376 dev->a_ops.adapter_intr = aac_sa_intr;
377 dev->a_ops.adapter_deliver = aac_rx_deliver_producer;
378 dev->a_ops.adapter_ioremap = aac_sa_ioremap;
381 * First clear out all interrupts. Then enable the one's that
384 aac_adapter_disable_int(dev);
385 aac_adapter_enable_int(dev);
387 if(aac_init_adapter(dev) == NULL)
389 if (request_irq(dev->pdev->irq, dev->a_ops.adapter_intr,
390 IRQF_SHARED|IRQF_DISABLED,
391 "aacraid", (void *)dev ) < 0) {
392 printk(KERN_WARNING "%s%d: Interrupt unavailable.\n",
396 aac_adapter_enable_int(dev);
399 * Tell the adapter that all is configure, and it can start
402 aac_sa_start_adapter(dev);
406 aac_sa_disable_interrupt(dev);
407 free_irq(dev->pdev->irq, (void *)dev);