1 /*
2 * Adaptec AAC series RAID controller driver
3 * (c) Copyright 2001 Red Hat Inc. <alan@redhat.com>
4 *
5 * based on the old aacraid driver that is..
6 * Adaptec aacraid device driver for Linux.
7 *
8 * Copyright (c) 2000 Adaptec, Inc. (aacraid@adaptec.com)
9 *
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)
13 * any later version.
14 *
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.
19 *
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.
23 *
24 * Module Name:
25 * sa.c
26 *
27 * Abstract: Drawbridge specific support functions
28 *
29 */
30
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>
44
45 #include <scsi/scsi_host.h>
46
47 #include "aacraid.h"
48
49 static irqreturn_t aac_sa_intr(int irq, void *dev_id, struct pt_regs *regs)
50 {
51 struct aac_dev *dev = dev_id;
52 unsigned short intstat, mask;
53
54 intstat = sa_readw(dev, DoorbellReg_p);
55 /*
56 * Read mask and invert because drawbridge is reversed.
57 * This allows us to only service interrupts that have been enabled.
58 */
59 mask = ~(sa_readw(dev, SaDbCSR.PRISETIRQMASK));
60
61 /* Check to see if this is our interrupt. If it isn't just return */
62
63 if (intstat & mask) {
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);
78 }
79 return IRQ_HANDLED;
80 }
81 return IRQ_NONE;
82 }
83
84 /**
85 * aac_sa_notify_adapter - handle adapter notification
86 * @dev: Adapter that notification is for
87 * @event: Event to notidy
88 *
89 * Notify the adapter of an event
90 */
91
92 void aac_sa_notify_adapter(struct aac_dev *dev, u32 event)
93 {
94 switch (event) {
95
96 case AdapNormCmdQue:
97 sa_writew(dev, DoorbellReg_s,DOORBELL_1);
98 break;
99 case HostNormRespNotFull:
100 sa_writew(dev, DoorbellReg_s,DOORBELL_4);
101 break;
102 case AdapNormRespQue:
103 sa_writew(dev, DoorbellReg_s,DOORBELL_2);
104 break;
105 case HostNormCmdNotFull:
106 sa_writew(dev, DoorbellReg_s,DOORBELL_3);
107 break;
108 case HostShutdown:
109 //sa_sync_cmd(dev, HOST_CRASHING, 0, &ret);
110 break;
111 case FastIo:
112 sa_writew(dev, DoorbellReg_s,DOORBELL_6);
113 break;
114 case AdapPrintfDone:
115 sa_writew(dev, DoorbellReg_s,DOORBELL_5);
116 break;
117 default:
118 BUG();
119 break;
120 }
121 }
122
123
124 /**
125 * sa_sync_cmd - send a command and wait
126 * @dev: Adapter
127 * @command: Command to execute
128 * @p1: first parameter
129 * @ret: adapter status
130 *
131 * This routine will send a synchronous comamnd to the adapter and wait
132 * for its completion.
133 */
134
135 static int sa_sync_cmd(struct aac_dev *dev, u32 command, u32 p1, u32 *ret)
136 {
137 unsigned long start;
138 int ok;
139 /*
140 * Write the Command into Mailbox 0
141 */
142 sa_writel(dev, Mailbox0, cpu_to_le32(command));
143 /*
144 * Write the parameters into Mailboxes 1 - 4
145 */
146 sa_writel(dev, Mailbox1, cpu_to_le32(p1));
147 sa_writel(dev, Mailbox2, 0);
148 sa_writel(dev, Mailbox3, 0);
149 sa_writel(dev, Mailbox4, 0);
150 /*
151 * Clear the synch command doorbell to start on a clean slate.
152 */
153 sa_writew(dev, DoorbellClrReg_p, DOORBELL_0);
154 /*
155 * Signal that there is a new synch command
156 */
157 sa_writew(dev, DoorbellReg_s, DOORBELL_0);
158
159 ok = 0;
160 start = jiffies;
161
162 while(time_before(jiffies, start+30*HZ))
163 {
164 /*
165 * Delay 5uS so that the monitor gets access
166 */
167 udelay(5);
168 /*
169 * Mon110 will set doorbell0 bit when it has
170 * completed the command.
171 */
172 if(sa_readw(dev, DoorbellReg_p) & DOORBELL_0) {
173 ok = 1;
174 break;
175 }
176 set_current_state(TASK_UNINTERRUPTIBLE);
177 schedule_timeout(1);
178 }
179
180 if (ok != 1)
181 return -ETIMEDOUT;
182 /*
183 * Clear the synch command doorbell.
184 */
185 sa_writew(dev, DoorbellClrReg_p, DOORBELL_0);
186 /*
187 * Pull the synch status from Mailbox 0.
188 */
189 *ret = le32_to_cpu(sa_readl(dev, Mailbox0));
190 return 0;
191 }
192
193 /**
194 * aac_sa_interrupt_adapter - interrupt an adapter
195 * @dev: Which adapter to enable.
196 *
197 * Breakpoint an adapter.
198 */
199
200 static void aac_sa_interrupt_adapter (struct aac_dev *dev)
201 {
202 u32 ret;
203 sa_sync_cmd(dev, BREAKPOINT_REQUEST, 0, &ret);
204 }
205
206 /**
207 * aac_sa_start_adapter - activate adapter
208 * @dev: Adapter
209 *
210 * Start up processing on an ARM based AAC adapter
211 */
212
213 static void aac_sa_start_adapter(struct aac_dev *dev)
214 {
215 u32 ret;
216 struct aac_init *init;
217 /*
218 * Fill in the remaining pieces of the init.
219 */
220 init = dev->init;
221 init->HostElapsedSeconds = cpu_to_le32(jiffies/HZ);
222
223 dprintk(("INIT\n"));
224 /*
225 * Tell the adapter we are back and up and running so it will scan its command
226 * queues and enable our interrupts
227 */
228 dev->irq_mask = (PrintfReady | DOORBELL_1 | DOORBELL_2 | DOORBELL_3 | DOORBELL_4);
229 /*
230 * First clear out all interrupts. Then enable the one's that
231 * we can handle.
232 */
233 dprintk(("MASK\n"));
234 sa_writew(dev, SaDbCSR.PRISETIRQMASK, cpu_to_le16(0xffff));
235 sa_writew(dev, SaDbCSR.PRICLEARIRQMASK, (PrintfReady | DOORBELL_1 | DOORBELL_2 | DOORBELL_3 | DOORBELL_4));
236 dprintk(("SYNCCMD\n"));
237 /* We can only use a 32 bit address here */
238 sa_sync_cmd(dev, INIT_STRUCT_BASE_ADDRESS, (u32)(ulong)dev->init_pa, &ret);
239 }
240
241 /**
242 * aac_sa_check_health
243 * @dev: device to check if healthy
244 *
245 * Will attempt to determine if the specified adapter is alive and
246 * capable of handling requests, returning 0 if alive.
247 */
248 static int aac_sa_check_health(struct aac_dev *dev)
249 {
250 long status = sa_readl(dev, Mailbox7);
251
252 /*
253 * Check to see if the board failed any self tests.
254 */
255 if (status & SELF_TEST_FAILED)
256 return -1;
257 /*
258 * Check to see if the board panic'd while booting.
259 */
260 if (status & KERNEL_PANIC)
261 return -2;
262 /*
263 * Wait for the adapter to be up and running. Wait up to 3 minutes
264 */
265 if (!(status & KERNEL_UP_AND_RUNNING))
266 return -3;
267 /*
268 * Everything is OK
269 */
270 return 0;
271 }
272
273 /**
274 * aac_sa_init - initialize an ARM based AAC card
275 * @dev: device to configure
276 *
277 * Allocate and set up resources for the ARM based AAC variants. The
278 * device_interface in the commregion will be allocated and linked
279 * to the comm region.
280 */
281
282 int aac_sa_init(struct aac_dev *dev)
283 {
284 unsigned long start;
285 unsigned long status;
286 int instance;
287 const char *name;
288
289 dprintk(("PREINST\n"));
290 instance = dev->id;
291 name = dev->name;
292
293 /*
294 * Map in the registers from the adapter.
295 */
296 dprintk(("PREMAP\n"));
297
298 if((dev->regs.sa = ioremap((unsigned long)dev->scsi_host_ptr->base, 8192))==NULL)
299 {
300 printk(KERN_WARNING "aacraid: unable to map ARM.\n" );
301 goto error_iounmap;
302 }
303 /*
304 * Check to see if the board failed any self tests.
305 */
306 if (sa_readl(dev, Mailbox7) & SELF_TEST_FAILED) {
307 printk(KERN_WARNING "%s%d: adapter self-test failed.\n", name, instance);
308 goto error_iounmap;
309 }
310 /*
311 * Check to see if the board panic'd while booting.
312 */
313 if (sa_readl(dev, Mailbox7) & KERNEL_PANIC) {
314 printk(KERN_WARNING "%s%d: adapter kernel panic'd.\n", name, instance);
315 goto error_iounmap;
316 }
317 start = jiffies;
318 /*
319 * Wait for the adapter to be up and running. Wait up to 3 minutes.
320 */
321 while (!(sa_readl(dev, Mailbox7) & KERNEL_UP_AND_RUNNING)) {
322 if (time_after(jiffies, start+180*HZ)) {
323 status = sa_readl(dev, Mailbox7) >> 16;
324 printk(KERN_WARNING "%s%d: adapter kernel failed to start, init status = %d.\n", name, instance, le32_to_cpu(status));
325 goto error_iounmap;
326 }
327 set_current_state(TASK_UNINTERRUPTIBLE);
328 schedule_timeout(1);
329 }
330
331 dprintk(("ATIRQ\n"));
332 if (request_irq(dev->scsi_host_ptr->irq, aac_sa_intr, SA_SHIRQ|SA_INTERRUPT, "aacraid", (void *)dev ) < 0) {
333 printk(KERN_WARNING "%s%d: Interrupt unavailable.\n", name, instance);
334 goto error_iounmap;
335 }
336
337 /*
338 * Fill in the function dispatch table.
339 */
340
341 dev->a_ops.adapter_interrupt = aac_sa_interrupt_adapter;
342 dev->a_ops.adapter_notify = aac_sa_notify_adapter;
343 dev->a_ops.adapter_sync_cmd = sa_sync_cmd;
344 dev->a_ops.adapter_check_health = aac_sa_check_health;
345
346 dprintk(("FUNCDONE\n"));
347
348 if(aac_init_adapter(dev) == NULL)
349 goto error_irq;
350
351 dprintk(("NEWADAPTDONE\n"));
352 /*
353 * Start any kernel threads needed
354 */
355 dev->thread_pid = kernel_thread((int (*)(void *))aac_command_thread, dev, 0);
356 if (dev->thread_pid < 0) {
357 printk(KERN_ERR "aacraid: Unable to create command thread.\n");
358 goto error_kfree;
359 }
360
361 /*
362 * Tell the adapter that all is configure, and it can start
363 * accepting requests
364 */
365 dprintk(("STARTING\n"));
366 aac_sa_start_adapter(dev);
367 dprintk(("STARTED\n"));
368 return 0;
369
370
371 error_kfree:
372 kfree(dev->queues);
373
374 error_irq:
375 free_irq(dev->scsi_host_ptr->irq, (void *)dev);
376
377 error_iounmap:
378 iounmap(dev->regs.sa);
379
380 return -1;
381 }
382
383
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