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/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_rx_intr(int irq, void *dev_id, struct pt_regs *regs)
50 {
51 struct aac_dev *dev = dev_id;
52 unsigned long bellbits;
53 u8 intstat, mask;
54 intstat = rx_readb(dev, MUnit.OISR);
55 /*
56 * Read mask and invert because drawbridge is reversed.
57 * This allows us to only service interrupts that have
58 * been enabled.
59 */
60 mask = ~(dev->OIMR);
61 /* Check to see if this is our interrupt. If it isn't just return */
62 if (intstat & mask)
63 {
64 bellbits = rx_readl(dev, OutboundDoorbellReg);
65 if (bellbits & DoorBellPrintfReady) {
66 aac_printf(dev, le32_to_cpu(rx_readl (dev, IndexRegs.Mailbox[5])));
67 rx_writel(dev, MUnit.ODR,DoorBellPrintfReady);
68 rx_writel(dev, InboundDoorbellReg,DoorBellPrintfDone);
69 }
70 else if (bellbits & DoorBellAdapterNormCmdReady) {
71 rx_writel(dev, MUnit.ODR, DoorBellAdapterNormCmdReady);
72 aac_command_normal(&dev->queues->queue[HostNormCmdQueue]);
73 }
74 else if (bellbits & DoorBellAdapterNormRespReady) {
75 aac_response_normal(&dev->queues->queue[HostNormRespQueue]);
76 rx_writel(dev, MUnit.ODR,DoorBellAdapterNormRespReady);
77 }
78 else if (bellbits & DoorBellAdapterNormCmdNotFull) {
79 rx_writel(dev, MUnit.ODR, DoorBellAdapterNormCmdNotFull);
80 }
81 else if (bellbits & DoorBellAdapterNormRespNotFull) {
82 rx_writel(dev, MUnit.ODR, DoorBellAdapterNormCmdNotFull);
83 rx_writel(dev, MUnit.ODR, DoorBellAdapterNormRespNotFull);
84 }
85 return IRQ_HANDLED;
86 }
87 return IRQ_NONE;
88 }
89
90 /**
91 * rx_sync_cmd - send a command and wait
92 * @dev: Adapter
93 * @command: Command to execute
94 * @p1: first parameter
95 * @ret: adapter status
96 *
97 * This routine will send a synchronous comamnd to the adapter and wait
98 * for its completion.
99 */
100
101 static int rx_sync_cmd(struct aac_dev *dev, u32 command, u32 p1, u32 *status)
102 {
103 unsigned long start;
104 int ok;
105 /*
106 * Write the command into Mailbox 0
107 */
108 rx_writel(dev, InboundMailbox0, cpu_to_le32(command));
109 /*
110 * Write the parameters into Mailboxes 1 - 4
111 */
112 rx_writel(dev, InboundMailbox1, cpu_to_le32(p1));
113 rx_writel(dev, InboundMailbox2, 0);
114 rx_writel(dev, InboundMailbox3, 0);
115 rx_writel(dev, InboundMailbox4, 0);
116 /*
117 * Clear the synch command doorbell to start on a clean slate.
118 */
119 rx_writel(dev, OutboundDoorbellReg, OUTBOUNDDOORBELL_0);
120 /*
121 * Disable doorbell interrupts
122 */
123 rx_writeb(dev, MUnit.OIMR, dev->OIMR |= 0x04);
124 /*
125 * Force the completion of the mask register write before issuing
126 * the interrupt.
127 */
128 rx_readb (dev, MUnit.OIMR);
129 /*
130 * Signal that there is a new synch command
131 */
132 rx_writel(dev, InboundDoorbellReg, INBOUNDDOORBELL_0);
133
134 ok = 0;
135 start = jiffies;
136
137 /*
138 * Wait up to 30 seconds
139 */
140 while (time_before(jiffies, start+30*HZ))
141 {
142 udelay(5); /* Delay 5 microseconds to let Mon960 get info. */
143 /*
144 * Mon960 will set doorbell0 bit when it has completed the command.
145 */
146 if (rx_readl(dev, OutboundDoorbellReg) & OUTBOUNDDOORBELL_0) {
147 /*
148 * Clear the doorbell.
149 */
150 rx_writel(dev, OutboundDoorbellReg, OUTBOUNDDOORBELL_0);
151 ok = 1;
152 break;
153 }
154 /*
155 * Yield the processor in case we are slow
156 */
157 set_current_state(TASK_UNINTERRUPTIBLE);
158 schedule_timeout(1);
159 }
160 if (ok != 1) {
161 /*
162 * Restore interrupt mask even though we timed out
163 */
164 rx_writeb(dev, MUnit.OIMR, dev->OIMR &= 0xfb);
165 return -ETIMEDOUT;
166 }
167 /*
168 * Pull the synch status from Mailbox 0.
169 */
170 *status = le32_to_cpu(rx_readl(dev, IndexRegs.Mailbox[0]));
171 /*
172 * Clear the synch command doorbell.
173 */
174 rx_writel(dev, OutboundDoorbellReg, OUTBOUNDDOORBELL_0);
175 /*
176 * Restore interrupt mask
177 */
178 rx_writeb(dev, MUnit.OIMR, dev->OIMR &= 0xfb);
179 return 0;
180
181 }
182
183 /**
184 * aac_rx_interrupt_adapter - interrupt adapter
185 * @dev: Adapter
186 *
187 * Send an interrupt to the i960 and breakpoint it.
188 */
189
190 static void aac_rx_interrupt_adapter(struct aac_dev *dev)
191 {
192 u32 ret;
193 rx_sync_cmd(dev, BREAKPOINT_REQUEST, 0, &ret);
194 }
195
196 /**
197 * aac_rx_notify_adapter - send an event to the adapter
198 * @dev: Adapter
199 * @event: Event to send
200 *
201 * Notify the i960 that something it probably cares about has
202 * happened.
203 */
204
205 static void aac_rx_notify_adapter(struct aac_dev *dev, u32 event)
206 {
207 switch (event) {
208
209 case AdapNormCmdQue:
210 rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_1);
211 break;
212 case HostNormRespNotFull:
213 rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_4);
214 break;
215 case AdapNormRespQue:
216 rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_2);
217 break;
218 case HostNormCmdNotFull:
219 rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_3);
220 break;
221 case HostShutdown:
222 // rx_sync_cmd(dev, HOST_CRASHING, 0, 0, 0, 0, &ret);
223 break;
224 case FastIo:
225 rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_6);
226 break;
227 case AdapPrintfDone:
228 rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_5);
229 break;
230 default:
231 BUG();
232 break;
233 }
234 }
235
236 /**
237 * aac_rx_start_adapter - activate adapter
238 * @dev: Adapter
239 *
240 * Start up processing on an i960 based AAC adapter
241 */
242
243 static void aac_rx_start_adapter(struct aac_dev *dev)
244 {
245 u32 status;
246 struct aac_init *init;
247
248 init = dev->init;
249 init->HostElapsedSeconds = cpu_to_le32(get_seconds());
250 /*
251 * Tell the adapter we are back and up and running so it will scan
252 * its command queues and enable our interrupts
253 */
254 dev->irq_mask = (DoorBellPrintfReady | OUTBOUNDDOORBELL_1 | OUTBOUNDDOORBELL_2 | OUTBOUNDDOORBELL_3 | OUTBOUNDDOORBELL_4);
255 /*
256 * First clear out all interrupts. Then enable the one's that we
257 * can handle.
258 */
259 rx_writeb(dev, MUnit.OIMR, 0xff);
260 rx_writel(dev, MUnit.ODR, 0xffffffff);
261 // rx_writeb(dev, MUnit.OIMR, ~(u8)OUTBOUND_DOORBELL_INTERRUPT_MASK);
262 rx_writeb(dev, MUnit.OIMR, dev->OIMR = 0xfb);
263
264 // We can only use a 32 bit address here
265 rx_sync_cmd(dev, INIT_STRUCT_BASE_ADDRESS, (u32)(ulong)dev->init_pa, &status);
266 }
267
268 /**
269 * aac_rx_check_health
270 * @dev: device to check if healthy
271 *
272 * Will attempt to determine if the specified adapter is alive and
273 * capable of handling requests, returning 0 if alive.
274 */
275 static int aac_rx_check_health(struct aac_dev *dev)
276 {
277 u32 status = le32_to_cpu(rx_readl(dev, MUnit.OMRx[0]));
278
279 /*
280 * Check to see if the board failed any self tests.
281 */
282 if (status & SELF_TEST_FAILED)
283 return -1;
284 /*
285 * Check to see if the board panic'd.
286 */
287 if (status & KERNEL_PANIC) {
288 char * buffer;
289 struct POSTSTATUS {
290 u32 Post_Command;
291 u32 Post_Address;
292 } * post;
293 dma_addr_t paddr, baddr;
294 int ret;
295
296 if ((status & 0xFF000000L) == 0xBC000000L)
297 return (status >> 16) & 0xFF;
298 buffer = pci_alloc_consistent(dev->pdev, 512, &baddr);
299 ret = -2;
300 if (buffer == NULL)
301 return ret;
302 post = pci_alloc_consistent(dev->pdev,
303 sizeof(struct POSTSTATUS), &paddr);
304 if (post == NULL) {
305 pci_free_consistent(dev->pdev, 512, buffer, baddr);
306 return ret;
307 }
308 memset(buffer, 0, 512);
309 post->Post_Command = cpu_to_le32(COMMAND_POST_RESULTS);
310 post->Post_Address = cpu_to_le32(baddr);
311 rx_writel(dev, MUnit.IMRx[0], cpu_to_le32(paddr));
312 rx_sync_cmd(dev, COMMAND_POST_RESULTS, baddr, &status);
313 pci_free_consistent(dev->pdev, sizeof(struct POSTSTATUS),
314 post, paddr);
315 if ((buffer[0] == '') && (buffer[1] == 'x')) {
316 ret = (buffer[2] <= '9') ? (buffer[2] - '') : (buffer[2] - 'A' + 10);
317 ret <<= 4;
318 ret += (buffer[3] <= '9') ? (buffer[3] - '') : (buffer[3] - 'A' + 10);
319 }
320 pci_free_consistent(dev->pdev, 512, buffer, baddr);
321 return ret;
322 }
323 /*
324 * Wait for the adapter to be up and running.
325 */
326 if (!(status & KERNEL_UP_AND_RUNNING))
327 return -3;
328 /*
329 * Everything is OK
330 */
331 return 0;
332 }
333
334 /**
335 * aac_rx_init - initialize an i960 based AAC card
336 * @dev: device to configure
337 *
338 * Allocate and set up resources for the i960 based AAC variants. The
339 * device_interface in the commregion will be allocated and linked
340 * to the comm region.
341 */
342
343 int aac_rx_init(struct aac_dev *dev)
344 {
345 unsigned long start;
346 unsigned long status;
347 int instance;
348 const char * name;
349
350 instance = dev->id;
351 name = dev->name;
352
353 /*
354 * Map in the registers from the adapter.
355 */
356 if((dev->regs.rx = ioremap((unsigned long)dev->scsi_host_ptr->base, 8192))==NULL)
357 {
358 printk(KERN_WARNING "aacraid: unable to map i960.\n" );
359 return -1;
360 }
361 /*
362 * Check to see if the board failed any self tests.
363 */
364 if (rx_readl(dev, MUnit.OMRx[0]) & SELF_TEST_FAILED) {
365 printk(KERN_ERR "%s%d: adapter self-test failed.\n", dev->name, instance);
366 goto error_iounmap;
367 }
368 /*
369 * Check to see if the board panic'd while booting.
370 */
371 if (rx_readl(dev, MUnit.OMRx[0]) & KERNEL_PANIC) {
372 printk(KERN_ERR "%s%d: adapter kernel panic.\n", dev->name, instance);
373 goto error_iounmap;
374 }
375 /*
376 * Check to see if the monitor panic'd while booting.
377 */
378 if (rx_readl(dev, MUnit.OMRx[0]) & MONITOR_PANIC) {
379 printk(KERN_ERR "%s%d: adapter monitor panic.\n", dev->name, instance);
380 goto error_iounmap;
381 }
382 start = jiffies;
383 /*
384 * Wait for the adapter to be up and running. Wait up to 3 minutes
385 */
386 while ((!(rx_readl(dev, IndexRegs.Mailbox[7]) & KERNEL_UP_AND_RUNNING))
387 || (!(rx_readl(dev, MUnit.OMRx[0]) & KERNEL_UP_AND_RUNNING)))
388 {
389 if(time_after(jiffies, start+180*HZ))
390 {
391 status = rx_readl(dev, IndexRegs.Mailbox[7]) >> 16;
392 printk(KERN_ERR "%s%d: adapter kernel failed to start, init status = %ld.\n", dev->name, instance, status);
393 goto error_iounmap;
394 }
395 set_current_state(TASK_UNINTERRUPTIBLE);
396 schedule_timeout(1);
397 }
398 if (request_irq(dev->scsi_host_ptr->irq, aac_rx_intr, SA_SHIRQ|SA_INTERRUPT, "aacraid", (void *)dev)<0)
399 {
400 printk(KERN_ERR "%s%d: Interrupt unavailable.\n", name, instance);
401 goto error_iounmap;
402 }
403 /*
404 * Fill in the function dispatch table.
405 */
406 dev->a_ops.adapter_interrupt = aac_rx_interrupt_adapter;
407 dev->a_ops.adapter_notify = aac_rx_notify_adapter;
408 dev->a_ops.adapter_sync_cmd = rx_sync_cmd;
409 dev->a_ops.adapter_check_health = aac_rx_check_health;
410
411 if (aac_init_adapter(dev) == NULL)
412 goto error_irq;
413 /*
414 * Start any kernel threads needed
415 */
416 dev->thread_pid = kernel_thread((int (*)(void *))aac_command_thread, dev, 0);
417 if(dev->thread_pid < 0)
418 {
419 printk(KERN_ERR "aacraid: Unable to create rx thread.\n");
420 goto error_kfree;
421 }
422 /*
423 * Tell the adapter that all is configured, and it can start
424 * accepting requests
425 */
426 aac_rx_start_adapter(dev);
427 return 0;
428
429 error_kfree:
430 kfree(dev->queues);
431
432 error_irq:
433 free_irq(dev->scsi_host_ptr->irq, (void *)dev);
434
435 error_iounmap:
436 iounmap(dev->regs.rx);
437
438 return -1;
439 }
440
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