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1da177e4 LT |
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, 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 command 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, command); | |
143 | /* | |
144 | * Write the parameters into Mailboxes 1 - 4 | |
145 | */ | |
146 | sa_writel(dev, Mailbox1, 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 | if (ret) | |
190 | *ret = sa_readl(dev, Mailbox0); | |
191 | return 0; | |
192 | } | |
193 | ||
194 | /** | |
195 | * aac_sa_interrupt_adapter - interrupt an adapter | |
196 | * @dev: Which adapter to enable. | |
197 | * | |
198 | * Breakpoint an adapter. | |
199 | */ | |
200 | ||
201 | static void aac_sa_interrupt_adapter (struct aac_dev *dev) | |
202 | { | |
203 | u32 ret; | |
204 | sa_sync_cmd(dev, BREAKPOINT_REQUEST, 0, &ret); | |
205 | } | |
206 | ||
207 | /** | |
208 | * aac_sa_start_adapter - activate adapter | |
209 | * @dev: Adapter | |
210 | * | |
211 | * Start up processing on an ARM based AAC adapter | |
212 | */ | |
213 | ||
214 | static void aac_sa_start_adapter(struct aac_dev *dev) | |
215 | { | |
216 | u32 ret; | |
217 | struct aac_init *init; | |
218 | /* | |
219 | * Fill in the remaining pieces of the init. | |
220 | */ | |
221 | init = dev->init; | |
222 | init->HostElapsedSeconds = cpu_to_le32(get_seconds()); | |
223 | ||
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 | sa_writew(dev, SaDbCSR.PRISETIRQMASK, cpu_to_le16(0xffff)); | |
234 | sa_writew(dev, SaDbCSR.PRICLEARIRQMASK, (PrintfReady | DOORBELL_1 | DOORBELL_2 | DOORBELL_3 | DOORBELL_4)); | |
235 | /* We can only use a 32 bit address here */ | |
236 | sa_sync_cmd(dev, INIT_STRUCT_BASE_ADDRESS, (u32)(ulong)dev->init_pa, &ret); | |
237 | } | |
238 | ||
239 | /** | |
240 | * aac_sa_check_health | |
241 | * @dev: device to check if healthy | |
242 | * | |
243 | * Will attempt to determine if the specified adapter is alive and | |
244 | * capable of handling requests, returning 0 if alive. | |
245 | */ | |
246 | static int aac_sa_check_health(struct aac_dev *dev) | |
247 | { | |
248 | long status = sa_readl(dev, Mailbox7); | |
249 | ||
250 | /* | |
251 | * Check to see if the board failed any self tests. | |
252 | */ | |
253 | if (status & SELF_TEST_FAILED) | |
254 | return -1; | |
255 | /* | |
256 | * Check to see if the board panic'd while booting. | |
257 | */ | |
258 | if (status & KERNEL_PANIC) | |
259 | return -2; | |
260 | /* | |
261 | * Wait for the adapter to be up and running. Wait up to 3 minutes | |
262 | */ | |
263 | if (!(status & KERNEL_UP_AND_RUNNING)) | |
264 | return -3; | |
265 | /* | |
266 | * Everything is OK | |
267 | */ | |
268 | return 0; | |
269 | } | |
270 | ||
271 | /** | |
272 | * aac_sa_init - initialize an ARM based AAC card | |
273 | * @dev: device to configure | |
274 | * | |
275 | * Allocate and set up resources for the ARM based AAC variants. The | |
276 | * device_interface in the commregion will be allocated and linked | |
277 | * to the comm region. | |
278 | */ | |
279 | ||
280 | int aac_sa_init(struct aac_dev *dev) | |
281 | { | |
282 | unsigned long start; | |
283 | unsigned long status; | |
284 | int instance; | |
285 | const char *name; | |
286 | ||
287 | instance = dev->id; | |
288 | name = dev->name; | |
289 | ||
290 | /* | |
291 | * Map in the registers from the adapter. | |
292 | */ | |
293 | ||
294 | if((dev->regs.sa = ioremap((unsigned long)dev->scsi_host_ptr->base, 8192))==NULL) | |
295 | { | |
296 | printk(KERN_WARNING "aacraid: unable to map ARM.\n" ); | |
297 | goto error_iounmap; | |
298 | } | |
299 | /* | |
300 | * Check to see if the board failed any self tests. | |
301 | */ | |
302 | if (sa_readl(dev, Mailbox7) & SELF_TEST_FAILED) { | |
303 | printk(KERN_WARNING "%s%d: adapter self-test failed.\n", name, instance); | |
304 | goto error_iounmap; | |
305 | } | |
306 | /* | |
307 | * Check to see if the board panic'd while booting. | |
308 | */ | |
309 | if (sa_readl(dev, Mailbox7) & KERNEL_PANIC) { | |
310 | printk(KERN_WARNING "%s%d: adapter kernel panic'd.\n", name, instance); | |
311 | goto error_iounmap; | |
312 | } | |
313 | start = jiffies; | |
314 | /* | |
315 | * Wait for the adapter to be up and running. Wait up to 3 minutes. | |
316 | */ | |
317 | while (!(sa_readl(dev, Mailbox7) & KERNEL_UP_AND_RUNNING)) { | |
318 | if (time_after(jiffies, start+180*HZ)) { | |
319 | status = sa_readl(dev, Mailbox7); | |
320 | printk(KERN_WARNING "%s%d: adapter kernel failed to start, init status = %lx.\n", | |
321 | name, instance, status); | |
322 | goto error_iounmap; | |
323 | } | |
324 | set_current_state(TASK_UNINTERRUPTIBLE); | |
325 | schedule_timeout(1); | |
326 | } | |
327 | ||
328 | if (request_irq(dev->scsi_host_ptr->irq, aac_sa_intr, SA_SHIRQ|SA_INTERRUPT, "aacraid", (void *)dev ) < 0) { | |
329 | printk(KERN_WARNING "%s%d: Interrupt unavailable.\n", name, instance); | |
330 | goto error_iounmap; | |
331 | } | |
332 | ||
333 | /* | |
334 | * Fill in the function dispatch table. | |
335 | */ | |
336 | ||
337 | dev->a_ops.adapter_interrupt = aac_sa_interrupt_adapter; | |
338 | dev->a_ops.adapter_notify = aac_sa_notify_adapter; | |
339 | dev->a_ops.adapter_sync_cmd = sa_sync_cmd; | |
340 | dev->a_ops.adapter_check_health = aac_sa_check_health; | |
341 | ||
342 | ||
343 | if(aac_init_adapter(dev) == NULL) | |
344 | goto error_irq; | |
345 | ||
346 | /* | |
347 | * Start any kernel threads needed | |
348 | */ | |
349 | dev->thread_pid = kernel_thread((int (*)(void *))aac_command_thread, dev, 0); | |
350 | if (dev->thread_pid < 0) { | |
351 | printk(KERN_ERR "aacraid: Unable to create command thread.\n"); | |
352 | goto error_kfree; | |
353 | } | |
354 | ||
355 | /* | |
356 | * Tell the adapter that all is configure, and it can start | |
357 | * accepting requests | |
358 | */ | |
359 | aac_sa_start_adapter(dev); | |
360 | return 0; | |
361 | ||
362 | ||
363 | error_kfree: | |
364 | kfree(dev->queues); | |
365 | ||
366 | error_irq: | |
367 | free_irq(dev->scsi_host_ptr->irq, (void *)dev); | |
368 | ||
369 | error_iounmap: | |
370 | iounmap(dev->regs.sa); | |
371 | ||
372 | return -1; | |
373 | } | |
374 |