Commit | Line | Data |
---|---|---|
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 | |
1da177e4 | 69 | sa_writew(dev, DoorbellClrReg_p, DOORBELL_1); |
df3b7668 | 70 | aac_command_normal(&dev->queues->queue[HostNormCmdQueue]); |
1da177e4 | 71 | } else if (intstat & DOORBELL_2) { // dev -> Host Normal Response Ready |
1da177e4 | 72 | sa_writew(dev, DoorbellClrReg_p, DOORBELL_2); |
df3b7668 | 73 | aac_response_normal(&dev->queues->queue[HostNormRespQueue]); |
1da177e4 LT |
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 | ||
bd1aac80 MH |
84 | /** |
85 | * aac_sa_disable_interrupt - disable interrupt | |
86 | * @dev: Which adapter to enable. | |
87 | */ | |
88 | ||
89 | static void aac_sa_disable_interrupt (struct aac_dev *dev) | |
90 | { | |
91 | sa_writew(dev, SaDbCSR.PRISETIRQMASK, 0xffff); | |
92 | } | |
93 | ||
1da177e4 LT |
94 | /** |
95 | * aac_sa_notify_adapter - handle adapter notification | |
96 | * @dev: Adapter that notification is for | |
97 | * @event: Event to notidy | |
98 | * | |
99 | * Notify the adapter of an event | |
100 | */ | |
101 | ||
4833869e | 102 | static void aac_sa_notify_adapter(struct aac_dev *dev, u32 event) |
1da177e4 LT |
103 | { |
104 | switch (event) { | |
105 | ||
106 | case AdapNormCmdQue: | |
107 | sa_writew(dev, DoorbellReg_s,DOORBELL_1); | |
108 | break; | |
109 | case HostNormRespNotFull: | |
110 | sa_writew(dev, DoorbellReg_s,DOORBELL_4); | |
111 | break; | |
112 | case AdapNormRespQue: | |
113 | sa_writew(dev, DoorbellReg_s,DOORBELL_2); | |
114 | break; | |
115 | case HostNormCmdNotFull: | |
116 | sa_writew(dev, DoorbellReg_s,DOORBELL_3); | |
117 | break; | |
118 | case HostShutdown: | |
7c00ffa3 MH |
119 | /* |
120 | sa_sync_cmd(dev, HOST_CRASHING, 0, 0, 0, 0, 0, 0, | |
121 | NULL, NULL, NULL, NULL, NULL); | |
122 | */ | |
1da177e4 LT |
123 | break; |
124 | case FastIo: | |
125 | sa_writew(dev, DoorbellReg_s,DOORBELL_6); | |
126 | break; | |
127 | case AdapPrintfDone: | |
128 | sa_writew(dev, DoorbellReg_s,DOORBELL_5); | |
129 | break; | |
130 | default: | |
131 | BUG(); | |
132 | break; | |
133 | } | |
134 | } | |
135 | ||
136 | ||
137 | /** | |
138 | * sa_sync_cmd - send a command and wait | |
139 | * @dev: Adapter | |
140 | * @command: Command to execute | |
141 | * @p1: first parameter | |
142 | * @ret: adapter status | |
143 | * | |
144 | * This routine will send a synchronous command to the adapter and wait | |
145 | * for its completion. | |
146 | */ | |
147 | ||
7c00ffa3 MH |
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) | |
1da177e4 LT |
151 | { |
152 | unsigned long start; | |
153 | int ok; | |
154 | /* | |
155 | * Write the Command into Mailbox 0 | |
156 | */ | |
157 | sa_writel(dev, Mailbox0, command); | |
158 | /* | |
159 | * Write the parameters into Mailboxes 1 - 4 | |
160 | */ | |
161 | sa_writel(dev, Mailbox1, p1); | |
7c00ffa3 MH |
162 | sa_writel(dev, Mailbox2, p2); |
163 | sa_writel(dev, Mailbox3, p3); | |
164 | sa_writel(dev, Mailbox4, p4); | |
165 | ||
1da177e4 LT |
166 | /* |
167 | * Clear the synch command doorbell to start on a clean slate. | |
168 | */ | |
169 | sa_writew(dev, DoorbellClrReg_p, DOORBELL_0); | |
170 | /* | |
171 | * Signal that there is a new synch command | |
172 | */ | |
173 | sa_writew(dev, DoorbellReg_s, DOORBELL_0); | |
174 | ||
175 | ok = 0; | |
176 | start = jiffies; | |
177 | ||
178 | while(time_before(jiffies, start+30*HZ)) | |
179 | { | |
180 | /* | |
181 | * Delay 5uS so that the monitor gets access | |
182 | */ | |
183 | udelay(5); | |
184 | /* | |
185 | * Mon110 will set doorbell0 bit when it has | |
186 | * completed the command. | |
187 | */ | |
188 | if(sa_readw(dev, DoorbellReg_p) & DOORBELL_0) { | |
189 | ok = 1; | |
190 | break; | |
191 | } | |
1241f359 | 192 | msleep(1); |
1da177e4 LT |
193 | } |
194 | ||
195 | if (ok != 1) | |
196 | return -ETIMEDOUT; | |
197 | /* | |
198 | * Clear the synch command doorbell. | |
199 | */ | |
200 | sa_writew(dev, DoorbellClrReg_p, DOORBELL_0); | |
201 | /* | |
202 | * Pull the synch status from Mailbox 0. | |
203 | */ | |
204 | if (ret) | |
205 | *ret = sa_readl(dev, Mailbox0); | |
7c00ffa3 MH |
206 | if (r1) |
207 | *r1 = sa_readl(dev, Mailbox1); | |
208 | if (r2) | |
209 | *r2 = sa_readl(dev, Mailbox2); | |
210 | if (r3) | |
211 | *r3 = sa_readl(dev, Mailbox3); | |
212 | if (r4) | |
213 | *r4 = sa_readl(dev, Mailbox4); | |
1da177e4 LT |
214 | return 0; |
215 | } | |
216 | ||
217 | /** | |
218 | * aac_sa_interrupt_adapter - interrupt an adapter | |
219 | * @dev: Which adapter to enable. | |
220 | * | |
221 | * Breakpoint an adapter. | |
222 | */ | |
223 | ||
224 | static void aac_sa_interrupt_adapter (struct aac_dev *dev) | |
225 | { | |
7c00ffa3 | 226 | sa_sync_cmd(dev, BREAKPOINT_REQUEST, 0, 0, 0, 0, 0, 0, |
bd1aac80 | 227 | NULL, NULL, NULL, NULL, NULL); |
1da177e4 LT |
228 | } |
229 | ||
230 | /** | |
231 | * aac_sa_start_adapter - activate adapter | |
232 | * @dev: Adapter | |
233 | * | |
234 | * Start up processing on an ARM based AAC adapter | |
235 | */ | |
236 | ||
237 | static void aac_sa_start_adapter(struct aac_dev *dev) | |
238 | { | |
1da177e4 LT |
239 | struct aac_init *init; |
240 | /* | |
241 | * Fill in the remaining pieces of the init. | |
242 | */ | |
243 | init = dev->init; | |
244 | init->HostElapsedSeconds = cpu_to_le32(get_seconds()); | |
1da177e4 | 245 | /* We can only use a 32 bit address here */ |
7c00ffa3 MH |
246 | sa_sync_cmd(dev, INIT_STRUCT_BASE_ADDRESS, |
247 | (u32)(ulong)dev->init_pa, 0, 0, 0, 0, 0, | |
8e0c5ebd | 248 | NULL, NULL, NULL, NULL, NULL); |
1da177e4 LT |
249 | } |
250 | ||
251 | /** | |
252 | * aac_sa_check_health | |
253 | * @dev: device to check if healthy | |
254 | * | |
255 | * Will attempt to determine if the specified adapter is alive and | |
256 | * capable of handling requests, returning 0 if alive. | |
257 | */ | |
258 | static int aac_sa_check_health(struct aac_dev *dev) | |
259 | { | |
260 | long status = sa_readl(dev, Mailbox7); | |
261 | ||
262 | /* | |
263 | * Check to see if the board failed any self tests. | |
264 | */ | |
265 | if (status & SELF_TEST_FAILED) | |
266 | return -1; | |
267 | /* | |
268 | * Check to see if the board panic'd while booting. | |
269 | */ | |
270 | if (status & KERNEL_PANIC) | |
271 | return -2; | |
272 | /* | |
273 | * Wait for the adapter to be up and running. Wait up to 3 minutes | |
274 | */ | |
275 | if (!(status & KERNEL_UP_AND_RUNNING)) | |
276 | return -3; | |
277 | /* | |
278 | * Everything is OK | |
279 | */ | |
280 | return 0; | |
281 | } | |
282 | ||
283 | /** | |
284 | * aac_sa_init - initialize an ARM based AAC card | |
285 | * @dev: device to configure | |
286 | * | |
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. | |
290 | */ | |
291 | ||
292 | int aac_sa_init(struct aac_dev *dev) | |
293 | { | |
294 | unsigned long start; | |
295 | unsigned long status; | |
296 | int instance; | |
297 | const char *name; | |
298 | ||
299 | instance = dev->id; | |
300 | name = dev->name; | |
301 | ||
1da177e4 LT |
302 | /* |
303 | * Check to see if the board failed any self tests. | |
304 | */ | |
305 | if (sa_readl(dev, Mailbox7) & SELF_TEST_FAILED) { | |
306 | printk(KERN_WARNING "%s%d: adapter self-test failed.\n", name, instance); | |
307 | goto error_iounmap; | |
308 | } | |
309 | /* | |
310 | * Check to see if the board panic'd while booting. | |
311 | */ | |
312 | if (sa_readl(dev, Mailbox7) & KERNEL_PANIC) { | |
313 | printk(KERN_WARNING "%s%d: adapter kernel panic'd.\n", name, instance); | |
314 | goto error_iounmap; | |
315 | } | |
316 | start = jiffies; | |
317 | /* | |
318 | * Wait for the adapter to be up and running. Wait up to 3 minutes. | |
319 | */ | |
320 | while (!(sa_readl(dev, Mailbox7) & KERNEL_UP_AND_RUNNING)) { | |
404d9a90 | 321 | if (time_after(jiffies, start+startup_timeout*HZ)) { |
1da177e4 LT |
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); | |
325 | goto error_iounmap; | |
326 | } | |
404d9a90 | 327 | msleep(1); |
1da177e4 LT |
328 | } |
329 | ||
1d6f359a | 330 | if (request_irq(dev->scsi_host_ptr->irq, aac_sa_intr, IRQF_SHARED|IRQF_DISABLED, "aacraid", (void *)dev ) < 0) { |
1da177e4 LT |
331 | printk(KERN_WARNING "%s%d: Interrupt unavailable.\n", name, instance); |
332 | goto error_iounmap; | |
333 | } | |
334 | ||
335 | /* | |
336 | * Fill in the function dispatch table. | |
337 | */ | |
338 | ||
339 | dev->a_ops.adapter_interrupt = aac_sa_interrupt_adapter; | |
bd1aac80 | 340 | dev->a_ops.adapter_disable_int = aac_sa_disable_interrupt; |
1da177e4 LT |
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; | |
344 | ||
bd1aac80 MH |
345 | /* |
346 | * First clear out all interrupts. Then enable the one's that | |
347 | * we can handle. | |
348 | */ | |
349 | sa_writew(dev, SaDbCSR.PRISETIRQMASK, 0xffff); | |
350 | sa_writew(dev, SaDbCSR.PRICLEARIRQMASK, (PrintfReady | DOORBELL_1 | | |
351 | DOORBELL_2 | DOORBELL_3 | DOORBELL_4)); | |
1da177e4 LT |
352 | |
353 | if(aac_init_adapter(dev) == NULL) | |
354 | goto error_irq; | |
355 | ||
1da177e4 LT |
356 | /* |
357 | * Tell the adapter that all is configure, and it can start | |
358 | * accepting requests | |
359 | */ | |
360 | aac_sa_start_adapter(dev); | |
361 | return 0; | |
362 | ||
1da177e4 | 363 | error_irq: |
bd1aac80 | 364 | sa_writew(dev, SaDbCSR.PRISETIRQMASK, 0xffff); |
1da177e4 LT |
365 | free_irq(dev->scsi_host_ptr->irq, (void *)dev); |
366 | ||
367 | error_iounmap: | |
1da177e4 LT |
368 | |
369 | return -1; | |
370 | } | |
371 |