Merge branch 'master'
[linux-2.6] / drivers / scsi / aacraid / rx.c
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
53         dprintk((KERN_DEBUG "aac_rx_intr(%d,%p,%p)\n", irq, dev_id, regs));
54         if (dev->new_comm_interface) {
55                 u32 Index = rx_readl(dev, MUnit.OutboundQueue);
56                 if (Index == 0xFFFFFFFFL)
57                         Index = rx_readl(dev, MUnit.OutboundQueue);
58                 if (Index != 0xFFFFFFFFL) {
59                         do {
60                                 if (aac_intr_normal(dev, Index)) {
61                                         rx_writel(dev, MUnit.OutboundQueue, Index);
62                                         rx_writel(dev, MUnit.ODR, DoorBellAdapterNormRespReady);
63                                 }
64                                 Index = rx_readl(dev, MUnit.OutboundQueue);
65                         } while (Index != 0xFFFFFFFFL);
66                         return IRQ_HANDLED;
67                 }
68         } else {
69                 unsigned long bellbits;
70                 u8 intstat;
71                 intstat = rx_readb(dev, MUnit.OISR);
72                 /*
73                  *      Read mask and invert because drawbridge is reversed.
74                  *      This allows us to only service interrupts that have 
75                  *      been enabled.
76                  *      Check to see if this is our interrupt.  If it isn't just return
77                  */
78                 if (intstat & ~(dev->OIMR)) 
79                 {
80                         bellbits = rx_readl(dev, OutboundDoorbellReg);
81                         if (bellbits & DoorBellPrintfReady) {
82                                 aac_printf(dev, rx_readl (dev, IndexRegs.Mailbox[5]));
83                                 rx_writel(dev, MUnit.ODR,DoorBellPrintfReady);
84                                 rx_writel(dev, InboundDoorbellReg,DoorBellPrintfDone);
85                         }
86                         else if (bellbits & DoorBellAdapterNormCmdReady) {
87                                 rx_writel(dev, MUnit.ODR, DoorBellAdapterNormCmdReady);
88                                 aac_command_normal(&dev->queues->queue[HostNormCmdQueue]);
89                         }
90                         else if (bellbits & DoorBellAdapterNormRespReady) {
91                                 rx_writel(dev, MUnit.ODR,DoorBellAdapterNormRespReady);
92                                 aac_response_normal(&dev->queues->queue[HostNormRespQueue]);
93                         }
94                         else if (bellbits & DoorBellAdapterNormCmdNotFull) {
95                                 rx_writel(dev, MUnit.ODR, DoorBellAdapterNormCmdNotFull);
96                         }
97                         else if (bellbits & DoorBellAdapterNormRespNotFull) {
98                                 rx_writel(dev, MUnit.ODR, DoorBellAdapterNormCmdNotFull);
99                                 rx_writel(dev, MUnit.ODR, DoorBellAdapterNormRespNotFull);
100                         }
101                         return IRQ_HANDLED;
102                 }
103         }
104         return IRQ_NONE;
105 }
106
107 /**
108  *      aac_rx_disable_interrupt        -       Disable interrupts
109  *      @dev: Adapter
110  */
111
112 static void aac_rx_disable_interrupt(struct aac_dev *dev)
113 {
114         rx_writeb(dev, MUnit.OIMR, dev->OIMR = 0xff);
115 }
116
117 /**
118  *      rx_sync_cmd     -       send a command and wait
119  *      @dev: Adapter
120  *      @command: Command to execute
121  *      @p1: first parameter
122  *      @ret: adapter status
123  *
124  *      This routine will send a synchronous command to the adapter and wait 
125  *      for its completion.
126  */
127
128 static int rx_sync_cmd(struct aac_dev *dev, u32 command,
129         u32 p1, u32 p2, u32 p3, u32 p4, u32 p5, u32 p6,
130         u32 *status, u32 * r1, u32 * r2, u32 * r3, u32 * r4)
131 {
132         unsigned long start;
133         int ok;
134         /*
135          *      Write the command into Mailbox 0
136          */
137         rx_writel(dev, InboundMailbox0, command);
138         /*
139          *      Write the parameters into Mailboxes 1 - 6
140          */
141         rx_writel(dev, InboundMailbox1, p1);
142         rx_writel(dev, InboundMailbox2, p2);
143         rx_writel(dev, InboundMailbox3, p3);
144         rx_writel(dev, InboundMailbox4, p4);
145         /*
146          *      Clear the synch command doorbell to start on a clean slate.
147          */
148         rx_writel(dev, OutboundDoorbellReg, OUTBOUNDDOORBELL_0);
149         /*
150          *      Disable doorbell interrupts
151          */
152         rx_writeb(dev, MUnit.OIMR, dev->OIMR = 0xff);
153         /*
154          *      Force the completion of the mask register write before issuing
155          *      the interrupt.
156          */
157         rx_readb (dev, MUnit.OIMR);
158         /*
159          *      Signal that there is a new synch command
160          */
161         rx_writel(dev, InboundDoorbellReg, INBOUNDDOORBELL_0);
162
163         ok = 0;
164         start = jiffies;
165
166         /*
167          *      Wait up to 30 seconds
168          */
169         while (time_before(jiffies, start+30*HZ)) 
170         {
171                 udelay(5);      /* Delay 5 microseconds to let Mon960 get info. */
172                 /*
173                  *      Mon960 will set doorbell0 bit when it has completed the command.
174                  */
175                 if (rx_readl(dev, OutboundDoorbellReg) & OUTBOUNDDOORBELL_0) {
176                         /*
177                          *      Clear the doorbell.
178                          */
179                         rx_writel(dev, OutboundDoorbellReg, OUTBOUNDDOORBELL_0);
180                         ok = 1;
181                         break;
182                 }
183                 /*
184                  *      Yield the processor in case we are slow 
185                  */
186                 set_current_state(TASK_UNINTERRUPTIBLE);
187                 schedule_timeout(1);
188         }
189         if (ok != 1) {
190                 /*
191                  *      Restore interrupt mask even though we timed out
192                  */
193                 if (dev->new_comm_interface)
194                         rx_writeb(dev, MUnit.OIMR, dev->OIMR = 0xf7);
195                 else
196                         rx_writeb(dev, MUnit.OIMR, dev->OIMR = 0xfb);
197                 return -ETIMEDOUT;
198         }
199         /*
200          *      Pull the synch status from Mailbox 0.
201          */
202         if (status)
203                 *status = rx_readl(dev, IndexRegs.Mailbox[0]);
204         if (r1)
205                 *r1 = rx_readl(dev, IndexRegs.Mailbox[1]);
206         if (r2)
207                 *r2 = rx_readl(dev, IndexRegs.Mailbox[2]);
208         if (r3)
209                 *r3 = rx_readl(dev, IndexRegs.Mailbox[3]);
210         if (r4)
211                 *r4 = rx_readl(dev, IndexRegs.Mailbox[4]);
212         /*
213          *      Clear the synch command doorbell.
214          */
215         rx_writel(dev, OutboundDoorbellReg, OUTBOUNDDOORBELL_0);
216         /*
217          *      Restore interrupt mask
218          */
219         if (dev->new_comm_interface)
220                 rx_writeb(dev, MUnit.OIMR, dev->OIMR = 0xf7);
221         else
222                 rx_writeb(dev, MUnit.OIMR, dev->OIMR = 0xfb);
223         return 0;
224
225 }
226
227 /**
228  *      aac_rx_interrupt_adapter        -       interrupt adapter
229  *      @dev: Adapter
230  *
231  *      Send an interrupt to the i960 and breakpoint it.
232  */
233
234 static void aac_rx_interrupt_adapter(struct aac_dev *dev)
235 {
236         rx_sync_cmd(dev, BREAKPOINT_REQUEST, 0, 0, 0, 0, 0, 0, NULL, NULL, NULL, NULL, NULL);
237 }
238
239 /**
240  *      aac_rx_notify_adapter           -       send an event to the adapter
241  *      @dev: Adapter
242  *      @event: Event to send
243  *
244  *      Notify the i960 that something it probably cares about has
245  *      happened.
246  */
247
248 static void aac_rx_notify_adapter(struct aac_dev *dev, u32 event)
249 {
250         switch (event) {
251
252         case AdapNormCmdQue:
253                 rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_1);
254                 break;
255         case HostNormRespNotFull:
256                 rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_4);
257                 break;
258         case AdapNormRespQue:
259                 rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_2);
260                 break;
261         case HostNormCmdNotFull:
262                 rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_3);
263                 break;
264         case HostShutdown:
265 //              rx_sync_cmd(dev, HOST_CRASHING, 0, 0, 0, 0, 0, 0,
266 //                NULL, NULL, NULL, NULL, NULL);
267                 break;
268         case FastIo:
269                 rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_6);
270                 break;
271         case AdapPrintfDone:
272                 rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_5);
273                 break;
274         default:
275                 BUG();
276                 break;
277         }
278 }
279
280 /**
281  *      aac_rx_start_adapter            -       activate adapter
282  *      @dev:   Adapter
283  *
284  *      Start up processing on an i960 based AAC adapter
285  */
286
287 static void aac_rx_start_adapter(struct aac_dev *dev)
288 {
289         struct aac_init *init;
290
291         init = dev->init;
292         init->HostElapsedSeconds = cpu_to_le32(get_seconds());
293         // We can only use a 32 bit address here
294         rx_sync_cmd(dev, INIT_STRUCT_BASE_ADDRESS, (u32)(ulong)dev->init_pa,
295           0, 0, 0, 0, 0, NULL, NULL, NULL, NULL, NULL);
296 }
297
298 /**
299  *      aac_rx_check_health
300  *      @dev: device to check if healthy
301  *
302  *      Will attempt to determine if the specified adapter is alive and
303  *      capable of handling requests, returning 0 if alive.
304  */
305 static int aac_rx_check_health(struct aac_dev *dev)
306 {
307         u32 status = rx_readl(dev, MUnit.OMRx[0]);
308
309         /*
310          *      Check to see if the board failed any self tests.
311          */
312         if (status & SELF_TEST_FAILED)
313                 return -1;
314         /*
315          *      Check to see if the board panic'd.
316          */
317         if (status & KERNEL_PANIC) {
318                 char * buffer;
319                 struct POSTSTATUS {
320                         __le32 Post_Command;
321                         __le32 Post_Address;
322                 } * post;
323                 dma_addr_t paddr, baddr;
324                 int ret;
325
326                 if ((status & 0xFF000000L) == 0xBC000000L)
327                         return (status >> 16) & 0xFF;
328                 buffer = pci_alloc_consistent(dev->pdev, 512, &baddr);
329                 ret = -2;
330                 if (buffer == NULL)
331                         return ret;
332                 post = pci_alloc_consistent(dev->pdev,
333                   sizeof(struct POSTSTATUS), &paddr);
334                 if (post == NULL) {
335                         pci_free_consistent(dev->pdev, 512, buffer, baddr);
336                         return ret;
337                 }
338                 memset(buffer, 0, 512);
339                 post->Post_Command = cpu_to_le32(COMMAND_POST_RESULTS);
340                 post->Post_Address = cpu_to_le32(baddr);
341                 rx_writel(dev, MUnit.IMRx[0], paddr);
342                 rx_sync_cmd(dev, COMMAND_POST_RESULTS, baddr, 0, 0, 0, 0, 0,
343                   NULL, NULL, NULL, NULL, NULL);
344                 pci_free_consistent(dev->pdev, sizeof(struct POSTSTATUS),
345                   post, paddr);
346                 if ((buffer[0] == '0') && (buffer[1] == 'x')) {
347                         ret = (buffer[2] <= '9') ? (buffer[2] - '0') : (buffer[2] - 'A' + 10);
348                         ret <<= 4;
349                         ret += (buffer[3] <= '9') ? (buffer[3] - '0') : (buffer[3] - 'A' + 10);
350                 }
351                 pci_free_consistent(dev->pdev, 512, buffer, baddr);
352                 return ret;
353         }
354         /*
355          *      Wait for the adapter to be up and running.
356          */
357         if (!(status & KERNEL_UP_AND_RUNNING))
358                 return -3;
359         /*
360          *      Everything is OK
361          */
362         return 0;
363 }
364
365 /**
366  *      aac_rx_send
367  *      @fib: fib to issue
368  *
369  *      Will send a fib, returning 0 if successful.
370  */
371 static int aac_rx_send(struct fib * fib)
372 {
373         u64 addr = fib->hw_fib_pa;
374         struct aac_dev *dev = fib->dev;
375         volatile void __iomem *device = dev->regs.rx;
376         u32 Index;
377
378         dprintk((KERN_DEBUG "%p->aac_rx_send(%p->%llx)\n", dev, fib, addr));
379         Index = rx_readl(dev, MUnit.InboundQueue);
380         if (Index == 0xFFFFFFFFL)
381                 Index = rx_readl(dev, MUnit.InboundQueue);
382         dprintk((KERN_DEBUG "Index = 0x%x\n", Index));
383         if (Index == 0xFFFFFFFFL)
384                 return Index;
385         device += Index;
386         dprintk((KERN_DEBUG "entry = %x %x %u\n", (u32)(addr & 0xffffffff),
387           (u32)(addr >> 32), (u32)le16_to_cpu(fib->hw_fib->header.Size)));
388         writel((u32)(addr & 0xffffffff), device);
389         device += sizeof(u32);
390         writel((u32)(addr >> 32), device);
391         device += sizeof(u32);
392         writel(le16_to_cpu(fib->hw_fib->header.Size), device);
393         rx_writel(dev, MUnit.InboundQueue, Index);
394         dprintk((KERN_DEBUG "aac_rx_send - return 0\n"));
395         return 0;
396 }
397
398 /**
399  *      aac_rx_init     -       initialize an i960 based AAC card
400  *      @dev: device to configure
401  *
402  *      Allocate and set up resources for the i960 based AAC variants. The 
403  *      device_interface in the commregion will be allocated and linked 
404  *      to the comm region.
405  */
406
407 int aac_rx_init(struct aac_dev *dev)
408 {
409         unsigned long start;
410         unsigned long status;
411         int instance;
412         const char * name;
413
414         instance = dev->id;
415         name     = dev->name;
416
417         /*
418          *      Check to see if the board panic'd while booting.
419          */
420         /*
421          *      Check to see if the board failed any self tests.
422          */
423         if (rx_readl(dev, MUnit.OMRx[0]) & SELF_TEST_FAILED) {
424                 printk(KERN_ERR "%s%d: adapter self-test failed.\n", dev->name, instance);
425                 goto error_iounmap;
426         }
427         /*
428          *      Check to see if the board panic'd while booting.
429          */
430         if (rx_readl(dev, MUnit.OMRx[0]) & KERNEL_PANIC) {
431                 printk(KERN_ERR "%s%d: adapter kernel panic.\n", dev->name, instance);
432                 goto error_iounmap;
433         }
434         /*
435          *      Check to see if the monitor panic'd while booting.
436          */
437         if (rx_readl(dev, MUnit.OMRx[0]) & MONITOR_PANIC) {
438                 printk(KERN_ERR "%s%d: adapter monitor panic.\n", dev->name, instance);
439                 goto error_iounmap;
440         }
441         start = jiffies;
442         /*
443          *      Wait for the adapter to be up and running. Wait up to 3 minutes
444          */
445         while ((!(rx_readl(dev, IndexRegs.Mailbox[7]) & KERNEL_UP_AND_RUNNING))
446                 || (!(rx_readl(dev, MUnit.OMRx[0]) & KERNEL_UP_AND_RUNNING)))
447         {
448                 if(time_after(jiffies, start+180*HZ))
449                 {
450                         status = rx_readl(dev, IndexRegs.Mailbox[7]);
451                         printk(KERN_ERR "%s%d: adapter kernel failed to start, init status = %lx.\n", 
452                                         dev->name, instance, status);
453                         goto error_iounmap;
454                 }
455                 set_current_state(TASK_UNINTERRUPTIBLE);
456                 schedule_timeout(1);
457         }
458         if (request_irq(dev->scsi_host_ptr->irq, aac_rx_intr, SA_SHIRQ|SA_INTERRUPT, "aacraid", (void *)dev)<0) 
459         {
460                 printk(KERN_ERR "%s%d: Interrupt unavailable.\n", name, instance);
461                 goto error_iounmap;
462         }
463         /*
464          *      Fill in the function dispatch table.
465          */
466         dev->a_ops.adapter_interrupt = aac_rx_interrupt_adapter;
467         dev->a_ops.adapter_disable_int = aac_rx_disable_interrupt;
468         dev->a_ops.adapter_notify = aac_rx_notify_adapter;
469         dev->a_ops.adapter_sync_cmd = rx_sync_cmd;
470         dev->a_ops.adapter_check_health = aac_rx_check_health;
471         dev->a_ops.adapter_send = aac_rx_send;
472
473         /*
474          *      First clear out all interrupts.  Then enable the one's that we
475          *      can handle.
476          */
477         rx_writeb(dev, MUnit.OIMR, 0xff);
478         rx_writel(dev, MUnit.ODR, 0xffffffff);
479         rx_writeb(dev, MUnit.OIMR, dev->OIMR = 0xfb);
480
481         if (aac_init_adapter(dev) == NULL)
482                 goto error_irq;
483         if (dev->new_comm_interface)
484                 rx_writeb(dev, MUnit.OIMR, dev->OIMR = 0xf7);
485
486         /*
487          *      Tell the adapter that all is configured, and it can start
488          *      accepting requests
489          */
490         aac_rx_start_adapter(dev);
491         return 0;
492
493 error_irq:
494         rx_writeb(dev, MUnit.OIMR, dev->OIMR = 0xff);
495         free_irq(dev->scsi_host_ptr->irq, (void *)dev);
496
497 error_iounmap:
498
499         return -1;
500 }