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 * rx.c
26 *
27 * Abstract: Hardware miniport for Drawbridge specific hardware functions.
28 *
29 */
30
31 #include <linux/config.h>
32 #include <linux/kernel.h>
33 #include <linux/init.h>
34 #include <linux/types.h>
35 #include <linux/sched.h>
36 #include <linux/pci.h>
37 #include <linux/spinlock.h>
38 #include <linux/slab.h>
39 #include <linux/blk.h>
40 #include <linux/delay.h>
41 #include <linux/completion.h>
42 #include <asm/semaphore.h>
43 #include "scsi.h"
44 #include "hosts.h"
45
46 #include "aacraid.h"
47
aac_rx_intr(int irq,void * dev_id,struct pt_regs * regs)48 static void aac_rx_intr(int irq, void *dev_id, struct pt_regs *regs)
49 {
50 struct aac_dev *dev = dev_id;
51 unsigned long bellbits;
52 u8 intstat, mask;
53 intstat = rx_readb(dev, MUnit.OISR);
54 /*
55 * Read mask and invert because drawbridge is reversed.
56 * This allows us to only service interrupts that have
57 * been enabled.
58 */
59 mask = ~(rx_readb(dev, MUnit.OIMR));
60 /* Check to see if this is our interrupt. If it isn't just return */
61 if (intstat & mask)
62 {
63 bellbits = rx_readl(dev, OutboundDoorbellReg);
64 if (bellbits & DoorBellPrintfReady) {
65 aac_printf(dev, le32_to_cpu(rx_readl (dev, IndexRegs.Mailbox[5])));
66 rx_writel(dev, MUnit.ODR,DoorBellPrintfReady);
67 rx_writel(dev, InboundDoorbellReg,DoorBellPrintfDone);
68 }
69 else if (bellbits & DoorBellAdapterNormCmdReady) {
70 aac_command_normal(&dev->queues->queue[HostNormCmdQueue]);
71 rx_writel(dev, MUnit.ODR, DoorBellAdapterNormCmdReady);
72 }
73 else if (bellbits & DoorBellAdapterNormRespReady) {
74 aac_response_normal(&dev->queues->queue[HostNormRespQueue]);
75 rx_writel(dev, MUnit.ODR,DoorBellAdapterNormRespReady);
76 }
77 else if (bellbits & DoorBellAdapterNormCmdNotFull) {
78 rx_writel(dev, MUnit.ODR, DoorBellAdapterNormCmdNotFull);
79 }
80 else if (bellbits & DoorBellAdapterNormRespNotFull) {
81 rx_writel(dev, MUnit.ODR, DoorBellAdapterNormCmdNotFull);
82 rx_writel(dev, MUnit.ODR, DoorBellAdapterNormRespNotFull);
83 }
84 }
85 }
86
87 /**
88 * aac_rx_enable_interrupt - Enable event reporting
89 * @dev: Adapter
90 * @event: Event to enable
91 *
92 * Enable event reporting from the i960 for a given event.
93 */
94
aac_rx_enable_interrupt(struct aac_dev * dev,u32 event)95 static void aac_rx_enable_interrupt(struct aac_dev * dev, u32 event)
96 {
97 switch (event) {
98
99 case HostNormCmdQue:
100 dev->irq_mask &= ~(OUTBOUNDDOORBELL_1);
101 break;
102
103 case HostNormRespQue:
104 dev->irq_mask &= ~(OUTBOUNDDOORBELL_2);
105 break;
106
107 case AdapNormCmdNotFull:
108 dev->irq_mask &= ~(OUTBOUNDDOORBELL_3);
109 break;
110
111 case AdapNormRespNotFull:
112 dev->irq_mask &= ~(OUTBOUNDDOORBELL_4);
113 break;
114 }
115 }
116
117 /**
118 * aac_rx_disable_interrupt - Disable event reporting
119 * @dev: Adapter
120 * @event: Event to enable
121 *
122 * Disable event reporting from the i960 for a given event.
123 */
124
aac_rx_disable_interrupt(struct aac_dev * dev,u32 event)125 static void aac_rx_disable_interrupt(struct aac_dev *dev, u32 event)
126 {
127 switch (event) {
128
129 case HostNormCmdQue:
130 dev->irq_mask |= (OUTBOUNDDOORBELL_1);
131 break;
132
133 case HostNormRespQue:
134 dev->irq_mask |= (OUTBOUNDDOORBELL_2);
135 break;
136
137 case AdapNormCmdNotFull:
138 dev->irq_mask |= (OUTBOUNDDOORBELL_3);
139 break;
140
141 case AdapNormRespNotFull:
142 dev->irq_mask |= (OUTBOUNDDOORBELL_4);
143 break;
144 }
145 }
146
147 /**
148 * rx_sync_cmd - send a command and wait
149 * @dev: Adapter
150 * @command: Command to execute
151 * @p1: first parameter
152 * @ret: adapter status
153 *
154 * This routine will send a synchronous comamnd to the adapter and wait
155 * for its completion.
156 */
157
rx_sync_cmd(struct aac_dev * dev,u32 command,u32 p1,u32 * status)158 static int rx_sync_cmd(struct aac_dev *dev, u32 command, u32 p1, u32 *status)
159 {
160 unsigned long start;
161 int ok;
162 /*
163 * Write the command into Mailbox 0
164 */
165 rx_writel(dev, InboundMailbox0, cpu_to_le32(command));
166 /*
167 * Write the parameters into Mailboxes 1 - 4
168 */
169 rx_writel(dev, InboundMailbox1, cpu_to_le32(p1));
170 rx_writel(dev, InboundMailbox2, 0);
171 rx_writel(dev, InboundMailbox3, 0);
172 rx_writel(dev, InboundMailbox4, 0);
173 /*
174 * Clear the synch command doorbell to start on a clean slate.
175 */
176 rx_writel(dev, OutboundDoorbellReg, OUTBOUNDDOORBELL_0);
177 /*
178 * Disable doorbell interrupts
179 */
180 rx_writeb(dev, MUnit.OIMR, rx_readb(dev, MUnit.OIMR) | 0x04);
181 /*
182 * Force the completion of the mask register write before issuing
183 * the interrupt.
184 */
185 rx_readb (dev, MUnit.OIMR);
186 /*
187 * Signal that there is a new synch command
188 */
189 rx_writel(dev, InboundDoorbellReg, INBOUNDDOORBELL_0);
190
191 ok = 0;
192 start = jiffies;
193
194 /*
195 * Wait up to 30 seconds
196 */
197 while (time_before(jiffies, start+30*HZ))
198 {
199 udelay(5); /* Delay 5 microseconds to let Mon960 get info. */
200 /*
201 * Mon960 will set doorbell0 bit when it has completed the command.
202 */
203 if (rx_readl(dev, OutboundDoorbellReg) & OUTBOUNDDOORBELL_0) {
204 /*
205 * Clear the doorbell.
206 */
207 rx_writel(dev, OutboundDoorbellReg, OUTBOUNDDOORBELL_0);
208 ok = 1;
209 break;
210 }
211 /*
212 * Yield the processor in case we are slow
213 */
214 set_current_state(TASK_UNINTERRUPTIBLE);
215 schedule_timeout(1);
216 }
217 if (ok != 1) {
218 /*
219 * Restore interrupt mask even though we timed out
220 */
221 rx_writeb(dev, MUnit.OIMR, rx_readl(dev, MUnit.OIMR) & 0xfb);
222 return -ETIMEDOUT;
223 }
224 /*
225 * Pull the synch status from Mailbox 0.
226 */
227 *status = le32_to_cpu(rx_readl(dev, IndexRegs.Mailbox[0]));
228 /*
229 * Clear the synch command doorbell.
230 */
231 rx_writel(dev, OutboundDoorbellReg, OUTBOUNDDOORBELL_0);
232 /*
233 * Restore interrupt mask
234 */
235 rx_writeb(dev, MUnit.OIMR, rx_readl(dev, MUnit.OIMR) & 0xfb);
236 return 0;
237
238 }
239
240 /**
241 * aac_rx_interrupt_adapter - interrupt adapter
242 * @dev: Adapter
243 *
244 * Send an interrupt to the i960 and breakpoint it.
245 */
246
aac_rx_interrupt_adapter(struct aac_dev * dev)247 static void aac_rx_interrupt_adapter(struct aac_dev *dev)
248 {
249 u32 ret;
250 rx_sync_cmd(dev, BREAKPOINT_REQUEST, 0, &ret);
251 }
252
253 /**
254 * aac_rx_notify_adapter - send an event to the adapter
255 * @dev: Adapter
256 * @event: Event to send
257 *
258 * Notify the i960 that something it probably cares about has
259 * happened.
260 */
261
aac_rx_notify_adapter(struct aac_dev * dev,u32 event)262 static void aac_rx_notify_adapter(struct aac_dev *dev, u32 event)
263 {
264 switch (event) {
265
266 case AdapNormCmdQue:
267 rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_1);
268 break;
269 case HostNormRespNotFull:
270 rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_4);
271 break;
272 case AdapNormRespQue:
273 rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_2);
274 break;
275 case HostNormCmdNotFull:
276 rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_3);
277 break;
278 case HostShutdown:
279 // rx_sync_cmd(dev, HOST_CRASHING, 0, 0, 0, 0, &ret);
280 break;
281 case FastIo:
282 rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_6);
283 break;
284 case AdapPrintfDone:
285 rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_5);
286 break;
287 default:
288 BUG();
289 break;
290 }
291 }
292
293 /**
294 * aac_rx_start_adapter - activate adapter
295 * @dev: Adapter
296 *
297 * Start up processing on an i960 based AAC adapter
298 */
299
aac_rx_start_adapter(struct aac_dev * dev)300 static void aac_rx_start_adapter(struct aac_dev *dev)
301 {
302 u32 status;
303 struct aac_init *init;
304
305 init = dev->init;
306 init->HostElapsedSeconds = cpu_to_le32(jiffies/HZ);
307 /*
308 * Tell the adapter we are back and up and running so it will scan
309 * its command queues and enable our interrupts
310 */
311 dev->irq_mask = (DoorBellPrintfReady | OUTBOUNDDOORBELL_1 | OUTBOUNDDOORBELL_2 | OUTBOUNDDOORBELL_3 | OUTBOUNDDOORBELL_4);
312 /*
313 * First clear out all interrupts. Then enable the one's that we
314 * can handle.
315 */
316 rx_writeb(dev, MUnit.OIMR, 0xff);
317 rx_writel(dev, MUnit.ODR, 0xffffffff);
318 // rx_writeb(dev, MUnit.OIMR, ~(u8)OUTBOUND_DOORBELL_INTERRUPT_MASK);
319 rx_writeb(dev, MUnit.OIMR, 0xfb);
320
321 // We can only use a 32 bit address here
322 rx_sync_cmd(dev, INIT_STRUCT_BASE_ADDRESS, (u32)(ulong)dev->init_pa, &status);
323 }
324
325 /**
326 * aac_rx_init - initialize an i960 based AAC card
327 * @dev: device to configure
328 * @devnum: adapter number
329 *
330 * Allocate and set up resources for the i960 based AAC variants. The
331 * device_interface in the commregion will be allocated and linked
332 * to the comm region.
333 */
334
aac_rx_init(struct aac_dev * dev,unsigned long num)335 int aac_rx_init(struct aac_dev *dev, unsigned long num)
336 {
337 unsigned long start;
338 unsigned long status;
339 int instance;
340 const char * name;
341
342 dev->devnum = num;
343 instance = dev->id;
344 name = dev->name;
345
346 /*
347 * Map in the registers from the adapter.
348 */
349 if((dev->regs.rx = (struct rx_registers *)ioremap((unsigned long)dev->scsi_host_ptr->base, 8192))==NULL)
350 {
351 printk(KERN_WARNING "aacraid: unable to map i960.\n" );
352 return -1;
353 }
354 /*
355 * Check to see if the board failed any self tests.
356 */
357 if (rx_readl(dev, IndexRegs.Mailbox[7]) & SELF_TEST_FAILED) {
358 printk(KERN_ERR "%s%d: adapter self-test failed.\n", dev->name, instance);
359 return -1;
360 }
361 /*
362 * Check to see if the board panic'd while booting.
363 */
364 if (rx_readl(dev, IndexRegs.Mailbox[7]) & KERNEL_PANIC) {
365 printk(KERN_ERR "%s%d: adapter kernel panic'd.\n", dev->name, instance);
366 return -1;
367 }
368 start = jiffies;
369 /*
370 * Wait for the adapter to be up and running. Wait up to 3 minutes
371 */
372 while (!(rx_readl(dev, IndexRegs.Mailbox[7]) & KERNEL_UP_AND_RUNNING))
373 {
374 if(time_after(jiffies, start+180*HZ))
375 {
376 status = rx_readl(dev, IndexRegs.Mailbox[7]) >> 16;
377 printk(KERN_ERR "%s%d: adapter kernel failed to start, init status = %ld.\n", dev->name, instance, status);
378 return -1;
379 }
380 set_current_state(TASK_UNINTERRUPTIBLE);
381 schedule_timeout(1);
382 }
383 if (request_irq(dev->scsi_host_ptr->irq, aac_rx_intr, SA_SHIRQ|SA_INTERRUPT, "aacraid", (void *)dev)<0)
384 {
385 printk(KERN_ERR "%s%d: Interrupt unavailable.\n", name, instance);
386 return -1;
387 }
388 /*
389 * Fill in the function dispatch table.
390 */
391 dev->a_ops.adapter_interrupt = aac_rx_interrupt_adapter;
392 dev->a_ops.adapter_enable_int = aac_rx_enable_interrupt;
393 dev->a_ops.adapter_disable_int = aac_rx_disable_interrupt;
394 dev->a_ops.adapter_notify = aac_rx_notify_adapter;
395 dev->a_ops.adapter_sync_cmd = rx_sync_cmd;
396
397 if (aac_init_adapter(dev) == NULL)
398 return -1;
399 /*
400 * Start any kernel threads needed
401 */
402 dev->thread_pid = kernel_thread((int (*)(void *))aac_command_thread, dev, 0);
403 if(dev->thread_pid < 0)
404 {
405 printk(KERN_ERR "aacraid: Unable to create rx thread.\n");
406 return -1;
407 }
408 /*
409 * Tell the adapter that all is configured, and it can start
410 * accepting requests
411 */
412 aac_rx_start_adapter(dev);
413 return 0;
414 }
415