1 /* 2 * Adaptec AAC series RAID controller driver 3 * (c) Copyright 2001 Red Hat Inc. 4 * 5 * based on the old aacraid driver that is.. 6 * Adaptec aacraid device driver for Linux. 7 * 8 * Copyright (c) 2000-2007 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/pci.h> 35 #include <linux/spinlock.h> 36 #include <linux/blkdev.h> 37 #include <linux/delay.h> 38 #include <linux/completion.h> 39 #include <linux/time.h> 40 #include <linux/interrupt.h> 41 42 #include <scsi/scsi_host.h> 43 44 #include "aacraid.h" 45 46 static irqreturn_t aac_sa_intr(int irq, void *dev_id) 47 { 48 struct aac_dev *dev = dev_id; 49 unsigned short intstat, mask; 50 51 intstat = sa_readw(dev, DoorbellReg_p); 52 /* 53 * Read mask and invert because drawbridge is reversed. 54 * This allows us to only service interrupts that have been enabled. 55 */ 56 mask = ~(sa_readw(dev, SaDbCSR.PRISETIRQMASK)); 57 58 /* Check to see if this is our interrupt. If it isn't just return */ 59 60 if (intstat & mask) { 61 if (intstat & PrintfReady) { 62 aac_printf(dev, sa_readl(dev, Mailbox5)); 63 sa_writew(dev, DoorbellClrReg_p, PrintfReady); /* clear PrintfReady */ 64 sa_writew(dev, DoorbellReg_s, PrintfDone); 65 } else if (intstat & DOORBELL_1) { // dev -> Host Normal Command Ready 66 sa_writew(dev, DoorbellClrReg_p, DOORBELL_1); 67 aac_command_normal(&dev->queues->queue[HostNormCmdQueue]); 68 } else if (intstat & DOORBELL_2) { // dev -> Host Normal Response Ready 69 sa_writew(dev, DoorbellClrReg_p, DOORBELL_2); 70 aac_response_normal(&dev->queues->queue[HostNormRespQueue]); 71 } else if (intstat & DOORBELL_3) { // dev -> Host Normal Command Not Full 72 sa_writew(dev, DoorbellClrReg_p, DOORBELL_3); 73 } else if (intstat & DOORBELL_4) { // dev -> Host Normal Response Not Full 74 sa_writew(dev, DoorbellClrReg_p, DOORBELL_4); 75 } 76 return IRQ_HANDLED; 77 } 78 return IRQ_NONE; 79 } 80 81 /** 82 * aac_sa_disable_interrupt - disable interrupt 83 * @dev: Which adapter to enable. 84 */ 85 86 static void aac_sa_disable_interrupt (struct aac_dev *dev) 87 { 88 sa_writew(dev, SaDbCSR.PRISETIRQMASK, 0xffff); 89 } 90 91 /** 92 * aac_sa_enable_interrupt - enable interrupt 93 * @dev: Which adapter to enable. 94 */ 95 96 static void aac_sa_enable_interrupt (struct aac_dev *dev) 97 { 98 sa_writew(dev, SaDbCSR.PRICLEARIRQMASK, (PrintfReady | DOORBELL_1 | 99 DOORBELL_2 | DOORBELL_3 | DOORBELL_4)); 100 } 101 102 /** 103 * aac_sa_notify_adapter - handle adapter notification 104 * @dev: Adapter that notification is for 105 * @event: Event to notidy 106 * 107 * Notify the adapter of an event 108 */ 109 110 static void aac_sa_notify_adapter(struct aac_dev *dev, u32 event) 111 { 112 switch (event) { 113 114 case AdapNormCmdQue: 115 sa_writew(dev, DoorbellReg_s,DOORBELL_1); 116 break; 117 case HostNormRespNotFull: 118 sa_writew(dev, DoorbellReg_s,DOORBELL_4); 119 break; 120 case AdapNormRespQue: 121 sa_writew(dev, DoorbellReg_s,DOORBELL_2); 122 break; 123 case HostNormCmdNotFull: 124 sa_writew(dev, DoorbellReg_s,DOORBELL_3); 125 break; 126 case HostShutdown: 127 /* 128 sa_sync_cmd(dev, HOST_CRASHING, 0, 0, 0, 0, 0, 0, 129 NULL, NULL, NULL, NULL, NULL); 130 */ 131 break; 132 case FastIo: 133 sa_writew(dev, DoorbellReg_s,DOORBELL_6); 134 break; 135 case AdapPrintfDone: 136 sa_writew(dev, DoorbellReg_s,DOORBELL_5); 137 break; 138 default: 139 BUG(); 140 break; 141 } 142 } 143 144 145 /** 146 * sa_sync_cmd - send a command and wait 147 * @dev: Adapter 148 * @command: Command to execute 149 * @p1: first parameter 150 * @ret: adapter status 151 * 152 * This routine will send a synchronous command to the adapter and wait 153 * for its completion. 154 */ 155 156 static int sa_sync_cmd(struct aac_dev *dev, u32 command, 157 u32 p1, u32 p2, u32 p3, u32 p4, u32 p5, u32 p6, 158 u32 *ret, u32 *r1, u32 *r2, u32 *r3, u32 *r4) 159 { 160 unsigned long start; 161 int ok; 162 /* 163 * Write the Command into Mailbox 0 164 */ 165 sa_writel(dev, Mailbox0, command); 166 /* 167 * Write the parameters into Mailboxes 1 - 4 168 */ 169 sa_writel(dev, Mailbox1, p1); 170 sa_writel(dev, Mailbox2, p2); 171 sa_writel(dev, Mailbox3, p3); 172 sa_writel(dev, Mailbox4, p4); 173 174 /* 175 * Clear the synch command doorbell to start on a clean slate. 176 */ 177 sa_writew(dev, DoorbellClrReg_p, DOORBELL_0); 178 /* 179 * Signal that there is a new synch command 180 */ 181 sa_writew(dev, DoorbellReg_s, DOORBELL_0); 182 183 ok = 0; 184 start = jiffies; 185 186 while(time_before(jiffies, start+30*HZ)) 187 { 188 /* 189 * Delay 5uS so that the monitor gets access 190 */ 191 udelay(5); 192 /* 193 * Mon110 will set doorbell0 bit when it has 194 * completed the command. 195 */ 196 if(sa_readw(dev, DoorbellReg_p) & DOORBELL_0) { 197 ok = 1; 198 break; 199 } 200 msleep(1); 201 } 202 203 if (ok != 1) 204 return -ETIMEDOUT; 205 /* 206 * Clear the synch command doorbell. 207 */ 208 sa_writew(dev, DoorbellClrReg_p, DOORBELL_0); 209 /* 210 * Pull the synch status from Mailbox 0. 211 */ 212 if (ret) 213 *ret = sa_readl(dev, Mailbox0); 214 if (r1) 215 *r1 = sa_readl(dev, Mailbox1); 216 if (r2) 217 *r2 = sa_readl(dev, Mailbox2); 218 if (r3) 219 *r3 = sa_readl(dev, Mailbox3); 220 if (r4) 221 *r4 = sa_readl(dev, Mailbox4); 222 return 0; 223 } 224 225 /** 226 * aac_sa_interrupt_adapter - interrupt an adapter 227 * @dev: Which adapter to enable. 228 * 229 * Breakpoint an adapter. 230 */ 231 232 static void aac_sa_interrupt_adapter (struct aac_dev *dev) 233 { 234 sa_sync_cmd(dev, BREAKPOINT_REQUEST, 0, 0, 0, 0, 0, 0, 235 NULL, NULL, NULL, NULL, NULL); 236 } 237 238 /** 239 * aac_sa_start_adapter - activate adapter 240 * @dev: Adapter 241 * 242 * Start up processing on an ARM based AAC adapter 243 */ 244 245 static void aac_sa_start_adapter(struct aac_dev *dev) 246 { 247 struct aac_init *init; 248 /* 249 * Fill in the remaining pieces of the init. 250 */ 251 init = dev->init; 252 init->HostElapsedSeconds = cpu_to_le32(get_seconds()); 253 /* We can only use a 32 bit address here */ 254 sa_sync_cmd(dev, INIT_STRUCT_BASE_ADDRESS, 255 (u32)(ulong)dev->init_pa, 0, 0, 0, 0, 0, 256 NULL, NULL, NULL, NULL, NULL); 257 } 258 259 static int aac_sa_restart_adapter(struct aac_dev *dev, int bled) 260 { 261 return -EINVAL; 262 } 263 264 /** 265 * aac_sa_check_health 266 * @dev: device to check if healthy 267 * 268 * Will attempt to determine if the specified adapter is alive and 269 * capable of handling requests, returning 0 if alive. 270 */ 271 static int aac_sa_check_health(struct aac_dev *dev) 272 { 273 long status = sa_readl(dev, Mailbox7); 274 275 /* 276 * Check to see if the board failed any self tests. 277 */ 278 if (status & SELF_TEST_FAILED) 279 return -1; 280 /* 281 * Check to see if the board panic'd while booting. 282 */ 283 if (status & KERNEL_PANIC) 284 return -2; 285 /* 286 * Wait for the adapter to be up and running. Wait up to 3 minutes 287 */ 288 if (!(status & KERNEL_UP_AND_RUNNING)) 289 return -3; 290 /* 291 * Everything is OK 292 */ 293 return 0; 294 } 295 296 /** 297 * aac_sa_ioremap 298 * @size: mapping resize request 299 * 300 */ 301 static int aac_sa_ioremap(struct aac_dev * dev, u32 size) 302 { 303 if (!size) { 304 iounmap(dev->regs.sa); 305 return 0; 306 } 307 dev->base = dev->regs.sa = ioremap(dev->scsi_host_ptr->base, size); 308 return (dev->base == NULL) ? -1 : 0; 309 } 310 311 /** 312 * aac_sa_init - initialize an ARM based AAC card 313 * @dev: device to configure 314 * 315 * Allocate and set up resources for the ARM based AAC variants. The 316 * device_interface in the commregion will be allocated and linked 317 * to the comm region. 318 */ 319 320 int aac_sa_init(struct aac_dev *dev) 321 { 322 unsigned long start; 323 unsigned long status; 324 int instance; 325 const char *name; 326 327 instance = dev->id; 328 name = dev->name; 329 330 if (aac_sa_ioremap(dev, dev->base_size)) { 331 printk(KERN_WARNING "%s: unable to map adapter.\n", name); 332 goto error_iounmap; 333 } 334 335 /* 336 * Check to see if the board failed any self tests. 337 */ 338 if (sa_readl(dev, Mailbox7) & SELF_TEST_FAILED) { 339 printk(KERN_WARNING "%s%d: adapter self-test failed.\n", name, instance); 340 goto error_iounmap; 341 } 342 /* 343 * Check to see if the board panic'd while booting. 344 */ 345 if (sa_readl(dev, Mailbox7) & KERNEL_PANIC) { 346 printk(KERN_WARNING "%s%d: adapter kernel panic'd.\n", name, instance); 347 goto error_iounmap; 348 } 349 start = jiffies; 350 /* 351 * Wait for the adapter to be up and running. Wait up to 3 minutes. 352 */ 353 while (!(sa_readl(dev, Mailbox7) & KERNEL_UP_AND_RUNNING)) { 354 if (time_after(jiffies, start+startup_timeout*HZ)) { 355 status = sa_readl(dev, Mailbox7); 356 printk(KERN_WARNING "%s%d: adapter kernel failed to start, init status = %lx.\n", 357 name, instance, status); 358 goto error_iounmap; 359 } 360 msleep(1); 361 } 362 363 /* 364 * Fill in the function dispatch table. 365 */ 366 367 dev->a_ops.adapter_interrupt = aac_sa_interrupt_adapter; 368 dev->a_ops.adapter_disable_int = aac_sa_disable_interrupt; 369 dev->a_ops.adapter_enable_int = aac_sa_enable_interrupt; 370 dev->a_ops.adapter_notify = aac_sa_notify_adapter; 371 dev->a_ops.adapter_sync_cmd = sa_sync_cmd; 372 dev->a_ops.adapter_check_health = aac_sa_check_health; 373 dev->a_ops.adapter_restart = aac_sa_restart_adapter; 374 dev->a_ops.adapter_intr = aac_sa_intr; 375 dev->a_ops.adapter_deliver = aac_rx_deliver_producer; 376 dev->a_ops.adapter_ioremap = aac_sa_ioremap; 377 378 /* 379 * First clear out all interrupts. Then enable the one's that 380 * we can handle. 381 */ 382 aac_adapter_disable_int(dev); 383 aac_adapter_enable_int(dev); 384 385 if(aac_init_adapter(dev) == NULL) 386 goto error_irq; 387 if (request_irq(dev->pdev->irq, dev->a_ops.adapter_intr, 388 IRQF_SHARED|IRQF_DISABLED, 389 "aacraid", (void *)dev ) < 0) { 390 printk(KERN_WARNING "%s%d: Interrupt unavailable.\n", 391 name, instance); 392 goto error_iounmap; 393 } 394 aac_adapter_enable_int(dev); 395 396 /* 397 * Tell the adapter that all is configure, and it can start 398 * accepting requests 399 */ 400 aac_sa_start_adapter(dev); 401 return 0; 402 403 error_irq: 404 aac_sa_disable_interrupt(dev); 405 free_irq(dev->pdev->irq, (void *)dev); 406 407 error_iounmap: 408 409 return -1; 410 } 411 412