2 * Adaptec AAC series RAID controller driver
3 * (c) Copyright 2001 Red Hat Inc. <alan@redhat.com>
5 * based on the old aacraid driver that is..
6 * Adaptec aacraid device driver for Linux.
8 * Copyright (c) 2000 Adaptec, Inc. (aacraid@adaptec.com)
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)
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.
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.
27 * Abstract: Hardware miniport for Drawbridge specific hardware functions.
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>
45 #include <scsi/scsi_host.h>
49 static irqreturn_t aac_rx_intr(int irq, void *dev_id, struct pt_regs *regs)
51 struct aac_dev *dev = dev_id;
52 unsigned long bellbits;
54 intstat = rx_readb(dev, MUnit.OISR);
56 * Read mask and invert because drawbridge is reversed.
57 * This allows us to only service interrupts that have
61 /* Check to see if this is our interrupt. If it isn't just return */
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);
70 else if (bellbits & DoorBellAdapterNormCmdReady) {
71 rx_writel(dev, MUnit.ODR, DoorBellAdapterNormCmdReady);
72 aac_command_normal(&dev->queues->queue[HostNormCmdQueue]);
74 else if (bellbits & DoorBellAdapterNormRespReady) {
75 aac_response_normal(&dev->queues->queue[HostNormRespQueue]);
76 rx_writel(dev, MUnit.ODR,DoorBellAdapterNormRespReady);
78 else if (bellbits & DoorBellAdapterNormCmdNotFull) {
79 rx_writel(dev, MUnit.ODR, DoorBellAdapterNormCmdNotFull);
81 else if (bellbits & DoorBellAdapterNormRespNotFull) {
82 rx_writel(dev, MUnit.ODR, DoorBellAdapterNormCmdNotFull);
83 rx_writel(dev, MUnit.ODR, DoorBellAdapterNormRespNotFull);
91 * rx_sync_cmd - send a command and wait
93 * @command: Command to execute
94 * @p1: first parameter
95 * @ret: adapter status
97 * This routine will send a synchronous comamnd to the adapter and wait
101 static int rx_sync_cmd(struct aac_dev *dev, u32 command, u32 p1, u32 *status)
106 * Write the command into Mailbox 0
108 rx_writel(dev, InboundMailbox0, cpu_to_le32(command));
110 * Write the parameters into Mailboxes 1 - 4
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);
117 * Clear the synch command doorbell to start on a clean slate.
119 rx_writel(dev, OutboundDoorbellReg, OUTBOUNDDOORBELL_0);
121 * Disable doorbell interrupts
123 rx_writeb(dev, MUnit.OIMR, dev->OIMR |= 0x04);
125 * Force the completion of the mask register write before issuing
128 rx_readb (dev, MUnit.OIMR);
130 * Signal that there is a new synch command
132 rx_writel(dev, InboundDoorbellReg, INBOUNDDOORBELL_0);
138 * Wait up to 30 seconds
140 while (time_before(jiffies, start+30*HZ))
142 udelay(5); /* Delay 5 microseconds to let Mon960 get info. */
144 * Mon960 will set doorbell0 bit when it has completed the command.
146 if (rx_readl(dev, OutboundDoorbellReg) & OUTBOUNDDOORBELL_0) {
148 * Clear the doorbell.
150 rx_writel(dev, OutboundDoorbellReg, OUTBOUNDDOORBELL_0);
155 * Yield the processor in case we are slow
157 set_current_state(TASK_UNINTERRUPTIBLE);
162 * Restore interrupt mask even though we timed out
164 rx_writeb(dev, MUnit.OIMR, dev->OIMR &= 0xfb);
168 * Pull the synch status from Mailbox 0.
170 *status = le32_to_cpu(rx_readl(dev, IndexRegs.Mailbox[0]));
172 * Clear the synch command doorbell.
174 rx_writel(dev, OutboundDoorbellReg, OUTBOUNDDOORBELL_0);
176 * Restore interrupt mask
178 rx_writeb(dev, MUnit.OIMR, dev->OIMR &= 0xfb);
184 * aac_rx_interrupt_adapter - interrupt adapter
187 * Send an interrupt to the i960 and breakpoint it.
190 static void aac_rx_interrupt_adapter(struct aac_dev *dev)
193 rx_sync_cmd(dev, BREAKPOINT_REQUEST, 0, &ret);
197 * aac_rx_notify_adapter - send an event to the adapter
199 * @event: Event to send
201 * Notify the i960 that something it probably cares about has
205 static void aac_rx_notify_adapter(struct aac_dev *dev, u32 event)
210 rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_1);
212 case HostNormRespNotFull:
213 rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_4);
215 case AdapNormRespQue:
216 rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_2);
218 case HostNormCmdNotFull:
219 rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_3);
222 // rx_sync_cmd(dev, HOST_CRASHING, 0, 0, 0, 0, &ret);
225 rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_6);
228 rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_5);
237 * aac_rx_start_adapter - activate adapter
240 * Start up processing on an i960 based AAC adapter
243 static void aac_rx_start_adapter(struct aac_dev *dev)
246 struct aac_init *init;
249 init->HostElapsedSeconds = cpu_to_le32(get_seconds());
251 * Tell the adapter we are back and up and running so it will scan
252 * its command queues and enable our interrupts
254 dev->irq_mask = (DoorBellPrintfReady | OUTBOUNDDOORBELL_1 | OUTBOUNDDOORBELL_2 | OUTBOUNDDOORBELL_3 | OUTBOUNDDOORBELL_4);
256 * First clear out all interrupts. Then enable the one's that we
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);
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);
269 * aac_rx_check_health
270 * @dev: device to check if healthy
272 * Will attempt to determine if the specified adapter is alive and
273 * capable of handling requests, returning 0 if alive.
275 static int aac_rx_check_health(struct aac_dev *dev)
277 u32 status = le32_to_cpu(rx_readl(dev, MUnit.OMRx[0]));
280 * Check to see if the board failed any self tests.
282 if (status & SELF_TEST_FAILED)
285 * Check to see if the board panic'd.
287 if (status & KERNEL_PANIC) {
293 dma_addr_t paddr, baddr;
296 if ((status & 0xFF000000L) == 0xBC000000L)
297 return (status >> 16) & 0xFF;
298 buffer = pci_alloc_consistent(dev->pdev, 512, &baddr);
302 post = pci_alloc_consistent(dev->pdev,
303 sizeof(struct POSTSTATUS), &paddr);
305 pci_free_consistent(dev->pdev, 512, buffer, baddr);
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),
315 if ((buffer[0] == '0') && (buffer[1] == 'x')) {
316 ret = (buffer[2] <= '9') ? (buffer[2] - '0') : (buffer[2] - 'A' + 10);
318 ret += (buffer[3] <= '9') ? (buffer[3] - '0') : (buffer[3] - 'A' + 10);
320 pci_free_consistent(dev->pdev, 512, buffer, baddr);
324 * Wait for the adapter to be up and running.
326 if (!(status & KERNEL_UP_AND_RUNNING))
335 * aac_rx_init - initialize an i960 based AAC card
336 * @dev: device to configure
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.
343 int aac_rx_init(struct aac_dev *dev)
346 unsigned long status;
354 * Map in the registers from the adapter.
356 if((dev->regs.rx = ioremap((unsigned long)dev->scsi_host_ptr->base, 8192))==NULL)
358 printk(KERN_WARNING "aacraid: unable to map i960.\n" );
362 * Check to see if the board failed any self tests.
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);
369 * Check to see if the board panic'd while booting.
371 if (rx_readl(dev, MUnit.OMRx[0]) & KERNEL_PANIC) {
372 printk(KERN_ERR "%s%d: adapter kernel panic.\n", dev->name, instance);
376 * Check to see if the monitor panic'd while booting.
378 if (rx_readl(dev, MUnit.OMRx[0]) & MONITOR_PANIC) {
379 printk(KERN_ERR "%s%d: adapter monitor panic.\n", dev->name, instance);
384 * Wait for the adapter to be up and running. Wait up to 3 minutes
386 while ((!(rx_readl(dev, IndexRegs.Mailbox[7]) & KERNEL_UP_AND_RUNNING))
387 || (!(rx_readl(dev, MUnit.OMRx[0]) & KERNEL_UP_AND_RUNNING)))
389 if(time_after(jiffies, start+180*HZ))
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);
395 set_current_state(TASK_UNINTERRUPTIBLE);
398 if (request_irq(dev->scsi_host_ptr->irq, aac_rx_intr, SA_SHIRQ|SA_INTERRUPT, "aacraid", (void *)dev)<0)
400 printk(KERN_ERR "%s%d: Interrupt unavailable.\n", name, instance);
404 * Fill in the function dispatch table.
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;
411 if (aac_init_adapter(dev) == NULL)
414 * Start any kernel threads needed
416 dev->thread_pid = kernel_thread((int (*)(void *))aac_command_thread, dev, 0);
417 if(dev->thread_pid < 0)
419 printk(KERN_ERR "aacraid: Unable to create rx thread.\n");
423 * Tell the adapter that all is configured, and it can start
426 aac_rx_start_adapter(dev);
433 free_irq(dev->scsi_host_ptr->irq, (void *)dev);
436 iounmap(dev->regs.rx);