Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 |
| 69 | aac_command_normal(&dev->queues->queue[HostNormCmdQueue]); |
| 70 | sa_writew(dev, DoorbellClrReg_p, DOORBELL_1); |
| 71 | } else if (intstat & DOORBELL_2) { // dev -> Host Normal Response Ready |
| 72 | aac_response_normal(&dev->queues->queue[HostNormRespQueue]); |
| 73 | sa_writew(dev, DoorbellClrReg_p, DOORBELL_2); |
| 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 | |
| 84 | /** |
Mark Haverkamp | bd1aac8 | 2005-08-03 15:39:01 -0700 | [diff] [blame] | 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 | |
| 94 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Adrian Bunk | 4833869 | 2005-04-25 19:45:58 -0700 | [diff] [blame] | 102 | static void aac_sa_notify_adapter(struct aac_dev *dev, u32 event) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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: |
Mark Haverkamp | 7c00ffa | 2005-05-16 18:28:42 -0700 | [diff] [blame] | 119 | /* |
| 120 | sa_sync_cmd(dev, HOST_CRASHING, 0, 0, 0, 0, 0, 0, |
| 121 | NULL, NULL, NULL, NULL, NULL); |
| 122 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Mark Haverkamp | 7c00ffa | 2005-05-16 18:28:42 -0700 | [diff] [blame] | 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) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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); |
Mark Haverkamp | 7c00ffa | 2005-05-16 18:28:42 -0700 | [diff] [blame] | 162 | sa_writel(dev, Mailbox2, p2); |
| 163 | sa_writel(dev, Mailbox3, p3); |
| 164 | sa_writel(dev, Mailbox4, p4); |
| 165 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | } |
| 192 | set_current_state(TASK_UNINTERRUPTIBLE); |
| 193 | schedule_timeout(1); |
| 194 | } |
| 195 | |
| 196 | if (ok != 1) |
| 197 | return -ETIMEDOUT; |
| 198 | /* |
| 199 | * Clear the synch command doorbell. |
| 200 | */ |
| 201 | sa_writew(dev, DoorbellClrReg_p, DOORBELL_0); |
| 202 | /* |
| 203 | * Pull the synch status from Mailbox 0. |
| 204 | */ |
| 205 | if (ret) |
| 206 | *ret = sa_readl(dev, Mailbox0); |
Mark Haverkamp | 7c00ffa | 2005-05-16 18:28:42 -0700 | [diff] [blame] | 207 | if (r1) |
| 208 | *r1 = sa_readl(dev, Mailbox1); |
| 209 | if (r2) |
| 210 | *r2 = sa_readl(dev, Mailbox2); |
| 211 | if (r3) |
| 212 | *r3 = sa_readl(dev, Mailbox3); |
| 213 | if (r4) |
| 214 | *r4 = sa_readl(dev, Mailbox4); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | return 0; |
| 216 | } |
| 217 | |
| 218 | /** |
| 219 | * aac_sa_interrupt_adapter - interrupt an adapter |
| 220 | * @dev: Which adapter to enable. |
| 221 | * |
| 222 | * Breakpoint an adapter. |
| 223 | */ |
| 224 | |
| 225 | static void aac_sa_interrupt_adapter (struct aac_dev *dev) |
| 226 | { |
Mark Haverkamp | 7c00ffa | 2005-05-16 18:28:42 -0700 | [diff] [blame] | 227 | sa_sync_cmd(dev, BREAKPOINT_REQUEST, 0, 0, 0, 0, 0, 0, |
Mark Haverkamp | bd1aac8 | 2005-08-03 15:39:01 -0700 | [diff] [blame] | 228 | NULL, NULL, NULL, NULL, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 229 | } |
| 230 | |
| 231 | /** |
| 232 | * aac_sa_start_adapter - activate adapter |
| 233 | * @dev: Adapter |
| 234 | * |
| 235 | * Start up processing on an ARM based AAC adapter |
| 236 | */ |
| 237 | |
| 238 | static void aac_sa_start_adapter(struct aac_dev *dev) |
| 239 | { |
| 240 | u32 ret; |
| 241 | struct aac_init *init; |
| 242 | /* |
| 243 | * Fill in the remaining pieces of the init. |
| 244 | */ |
| 245 | init = dev->init; |
| 246 | init->HostElapsedSeconds = cpu_to_le32(get_seconds()); |
| 247 | |
| 248 | /* |
| 249 | * Tell the adapter we are back and up and running so it will scan its command |
| 250 | * queues and enable our interrupts |
| 251 | */ |
| 252 | dev->irq_mask = (PrintfReady | DOORBELL_1 | DOORBELL_2 | DOORBELL_3 | DOORBELL_4); |
| 253 | /* |
| 254 | * First clear out all interrupts. Then enable the one's that |
| 255 | * we can handle. |
| 256 | */ |
Mark Haverkamp | 56b5871 | 2005-04-27 06:05:51 -0700 | [diff] [blame] | 257 | sa_writew(dev, SaDbCSR.PRISETIRQMASK, 0xffff); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 258 | sa_writew(dev, SaDbCSR.PRICLEARIRQMASK, (PrintfReady | DOORBELL_1 | DOORBELL_2 | DOORBELL_3 | DOORBELL_4)); |
| 259 | /* We can only use a 32 bit address here */ |
Mark Haverkamp | 7c00ffa | 2005-05-16 18:28:42 -0700 | [diff] [blame] | 260 | sa_sync_cmd(dev, INIT_STRUCT_BASE_ADDRESS, |
| 261 | (u32)(ulong)dev->init_pa, 0, 0, 0, 0, 0, |
| 262 | &ret, NULL, NULL, NULL, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | } |
| 264 | |
| 265 | /** |
| 266 | * aac_sa_check_health |
| 267 | * @dev: device to check if healthy |
| 268 | * |
| 269 | * Will attempt to determine if the specified adapter is alive and |
| 270 | * capable of handling requests, returning 0 if alive. |
| 271 | */ |
| 272 | static int aac_sa_check_health(struct aac_dev *dev) |
| 273 | { |
| 274 | long status = sa_readl(dev, Mailbox7); |
| 275 | |
| 276 | /* |
| 277 | * Check to see if the board failed any self tests. |
| 278 | */ |
| 279 | if (status & SELF_TEST_FAILED) |
| 280 | return -1; |
| 281 | /* |
| 282 | * Check to see if the board panic'd while booting. |
| 283 | */ |
| 284 | if (status & KERNEL_PANIC) |
| 285 | return -2; |
| 286 | /* |
| 287 | * Wait for the adapter to be up and running. Wait up to 3 minutes |
| 288 | */ |
| 289 | if (!(status & KERNEL_UP_AND_RUNNING)) |
| 290 | return -3; |
| 291 | /* |
| 292 | * Everything is OK |
| 293 | */ |
| 294 | return 0; |
| 295 | } |
| 296 | |
| 297 | /** |
| 298 | * aac_sa_init - initialize an ARM based AAC card |
| 299 | * @dev: device to configure |
| 300 | * |
| 301 | * Allocate and set up resources for the ARM based AAC variants. The |
| 302 | * device_interface in the commregion will be allocated and linked |
| 303 | * to the comm region. |
| 304 | */ |
| 305 | |
| 306 | int aac_sa_init(struct aac_dev *dev) |
| 307 | { |
| 308 | unsigned long start; |
| 309 | unsigned long status; |
| 310 | int instance; |
| 311 | const char *name; |
| 312 | |
| 313 | instance = dev->id; |
| 314 | name = dev->name; |
| 315 | |
| 316 | /* |
| 317 | * Map in the registers from the adapter. |
| 318 | */ |
| 319 | |
| 320 | if((dev->regs.sa = ioremap((unsigned long)dev->scsi_host_ptr->base, 8192))==NULL) |
| 321 | { |
| 322 | printk(KERN_WARNING "aacraid: unable to map ARM.\n" ); |
| 323 | goto error_iounmap; |
| 324 | } |
| 325 | /* |
| 326 | * Check to see if the board failed any self tests. |
| 327 | */ |
| 328 | if (sa_readl(dev, Mailbox7) & SELF_TEST_FAILED) { |
| 329 | printk(KERN_WARNING "%s%d: adapter self-test failed.\n", name, instance); |
| 330 | goto error_iounmap; |
| 331 | } |
| 332 | /* |
| 333 | * Check to see if the board panic'd while booting. |
| 334 | */ |
| 335 | if (sa_readl(dev, Mailbox7) & KERNEL_PANIC) { |
| 336 | printk(KERN_WARNING "%s%d: adapter kernel panic'd.\n", name, instance); |
| 337 | goto error_iounmap; |
| 338 | } |
| 339 | start = jiffies; |
| 340 | /* |
| 341 | * Wait for the adapter to be up and running. Wait up to 3 minutes. |
| 342 | */ |
| 343 | while (!(sa_readl(dev, Mailbox7) & KERNEL_UP_AND_RUNNING)) { |
| 344 | if (time_after(jiffies, start+180*HZ)) { |
| 345 | status = sa_readl(dev, Mailbox7); |
| 346 | printk(KERN_WARNING "%s%d: adapter kernel failed to start, init status = %lx.\n", |
| 347 | name, instance, status); |
| 348 | goto error_iounmap; |
| 349 | } |
| 350 | set_current_state(TASK_UNINTERRUPTIBLE); |
| 351 | schedule_timeout(1); |
| 352 | } |
| 353 | |
| 354 | if (request_irq(dev->scsi_host_ptr->irq, aac_sa_intr, SA_SHIRQ|SA_INTERRUPT, "aacraid", (void *)dev ) < 0) { |
| 355 | printk(KERN_WARNING "%s%d: Interrupt unavailable.\n", name, instance); |
| 356 | goto error_iounmap; |
| 357 | } |
| 358 | |
| 359 | /* |
| 360 | * Fill in the function dispatch table. |
| 361 | */ |
| 362 | |
| 363 | dev->a_ops.adapter_interrupt = aac_sa_interrupt_adapter; |
Mark Haverkamp | bd1aac8 | 2005-08-03 15:39:01 -0700 | [diff] [blame] | 364 | dev->a_ops.adapter_disable_int = aac_sa_disable_interrupt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | dev->a_ops.adapter_notify = aac_sa_notify_adapter; |
| 366 | dev->a_ops.adapter_sync_cmd = sa_sync_cmd; |
| 367 | dev->a_ops.adapter_check_health = aac_sa_check_health; |
| 368 | |
Mark Haverkamp | bd1aac8 | 2005-08-03 15:39:01 -0700 | [diff] [blame] | 369 | /* |
| 370 | * First clear out all interrupts. Then enable the one's that |
| 371 | * we can handle. |
| 372 | */ |
| 373 | sa_writew(dev, SaDbCSR.PRISETIRQMASK, 0xffff); |
| 374 | sa_writew(dev, SaDbCSR.PRICLEARIRQMASK, (PrintfReady | DOORBELL_1 | |
| 375 | DOORBELL_2 | DOORBELL_3 | DOORBELL_4)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | |
| 377 | if(aac_init_adapter(dev) == NULL) |
| 378 | goto error_irq; |
| 379 | |
| 380 | /* |
| 381 | * Start any kernel threads needed |
| 382 | */ |
| 383 | dev->thread_pid = kernel_thread((int (*)(void *))aac_command_thread, dev, 0); |
| 384 | if (dev->thread_pid < 0) { |
| 385 | printk(KERN_ERR "aacraid: Unable to create command thread.\n"); |
| 386 | goto error_kfree; |
| 387 | } |
| 388 | |
| 389 | /* |
| 390 | * Tell the adapter that all is configure, and it can start |
| 391 | * accepting requests |
| 392 | */ |
| 393 | aac_sa_start_adapter(dev); |
| 394 | return 0; |
| 395 | |
| 396 | |
| 397 | error_kfree: |
| 398 | kfree(dev->queues); |
| 399 | |
| 400 | error_irq: |
Mark Haverkamp | bd1aac8 | 2005-08-03 15:39:01 -0700 | [diff] [blame] | 401 | sa_writew(dev, SaDbCSR.PRISETIRQMASK, 0xffff); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | free_irq(dev->scsi_host_ptr->irq, (void *)dev); |
| 403 | |
| 404 | error_iounmap: |
| 405 | iounmap(dev->regs.sa); |
| 406 | |
| 407 | return -1; |
| 408 | } |
| 409 | |