1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Adaptec AAC series RAID controller driver 4 * (c) Copyright 2001 Red Hat Inc. 5 * 6 * based on the old aacraid driver that is.. 7 * Adaptec aacraid device driver for Linux. 8 * 9 * Copyright (c) 2000-2010 Adaptec, Inc. 10 * 2010-2015 PMC-Sierra, Inc. (aacraid@pmc-sierra.com) 11 * 2016-2017 Microsemi Corp. (aacraid@microsemi.com) 12 * 13 * Module Name: 14 * sa.c 15 * 16 * Abstract: Drawbridge specific support functions 17 */ 18 19 #include <linux/kernel.h> 20 #include <linux/init.h> 21 #include <linux/types.h> 22 #include <linux/pci.h> 23 #include <linux/spinlock.h> 24 #include <linux/blkdev.h> 25 #include <linux/delay.h> 26 #include <linux/completion.h> 27 #include <linux/time.h> 28 #include <linux/interrupt.h> 29 30 #include <scsi/scsi_host.h> 31 32 #include "aacraid.h" 33 34 static irqreturn_t aac_sa_intr(int irq, void *dev_id) 35 { 36 struct aac_dev *dev = dev_id; 37 unsigned short intstat, mask; 38 39 intstat = sa_readw(dev, DoorbellReg_p); 40 /* 41 * Read mask and invert because drawbridge is reversed. 42 * This allows us to only service interrupts that have been enabled. 43 */ 44 mask = ~(sa_readw(dev, SaDbCSR.PRISETIRQMASK)); 45 46 /* Check to see if this is our interrupt. If it isn't just return */ 47 48 if (intstat & mask) { 49 if (intstat & PrintfReady) { 50 aac_printf(dev, sa_readl(dev, Mailbox5)); 51 sa_writew(dev, DoorbellClrReg_p, PrintfReady); /* clear PrintfReady */ 52 sa_writew(dev, DoorbellReg_s, PrintfDone); 53 } else if (intstat & DOORBELL_1) { // dev -> Host Normal Command Ready 54 sa_writew(dev, DoorbellClrReg_p, DOORBELL_1); 55 aac_command_normal(&dev->queues->queue[HostNormCmdQueue]); 56 } else if (intstat & DOORBELL_2) { // dev -> Host Normal Response Ready 57 sa_writew(dev, DoorbellClrReg_p, DOORBELL_2); 58 aac_response_normal(&dev->queues->queue[HostNormRespQueue]); 59 } else if (intstat & DOORBELL_3) { // dev -> Host Normal Command Not Full 60 sa_writew(dev, DoorbellClrReg_p, DOORBELL_3); 61 } else if (intstat & DOORBELL_4) { // dev -> Host Normal Response Not Full 62 sa_writew(dev, DoorbellClrReg_p, DOORBELL_4); 63 } 64 return IRQ_HANDLED; 65 } 66 return IRQ_NONE; 67 } 68 69 /** 70 * aac_sa_disable_interrupt - disable interrupt 71 * @dev: Which adapter to enable. 72 */ 73 74 static void aac_sa_disable_interrupt (struct aac_dev *dev) 75 { 76 sa_writew(dev, SaDbCSR.PRISETIRQMASK, 0xffff); 77 } 78 79 /** 80 * aac_sa_enable_interrupt - enable interrupt 81 * @dev: Which adapter to enable. 82 */ 83 84 static void aac_sa_enable_interrupt (struct aac_dev *dev) 85 { 86 sa_writew(dev, SaDbCSR.PRICLEARIRQMASK, (PrintfReady | DOORBELL_1 | 87 DOORBELL_2 | DOORBELL_3 | DOORBELL_4)); 88 } 89 90 /** 91 * aac_sa_notify_adapter - handle adapter notification 92 * @dev: Adapter that notification is for 93 * @event: Event to notidy 94 * 95 * Notify the adapter of an event 96 */ 97 98 static void aac_sa_notify_adapter(struct aac_dev *dev, u32 event) 99 { 100 switch (event) { 101 102 case AdapNormCmdQue: 103 sa_writew(dev, DoorbellReg_s,DOORBELL_1); 104 break; 105 case HostNormRespNotFull: 106 sa_writew(dev, DoorbellReg_s,DOORBELL_4); 107 break; 108 case AdapNormRespQue: 109 sa_writew(dev, DoorbellReg_s,DOORBELL_2); 110 break; 111 case HostNormCmdNotFull: 112 sa_writew(dev, DoorbellReg_s,DOORBELL_3); 113 break; 114 case HostShutdown: 115 /* 116 sa_sync_cmd(dev, HOST_CRASHING, 0, 0, 0, 0, 0, 0, 117 NULL, NULL, NULL, NULL, NULL); 118 */ 119 break; 120 case FastIo: 121 sa_writew(dev, DoorbellReg_s,DOORBELL_6); 122 break; 123 case AdapPrintfDone: 124 sa_writew(dev, DoorbellReg_s,DOORBELL_5); 125 break; 126 default: 127 BUG(); 128 break; 129 } 130 } 131 132 133 /** 134 * sa_sync_cmd - send a command and wait 135 * @dev: Adapter 136 * @command: Command to execute 137 * @p1: first parameter 138 * @ret: adapter status 139 * 140 * This routine will send a synchronous command to the adapter and wait 141 * for its completion. 142 */ 143 144 static int sa_sync_cmd(struct aac_dev *dev, u32 command, 145 u32 p1, u32 p2, u32 p3, u32 p4, u32 p5, u32 p6, 146 u32 *ret, u32 *r1, u32 *r2, u32 *r3, u32 *r4) 147 { 148 unsigned long start; 149 int ok; 150 /* 151 * Write the Command into Mailbox 0 152 */ 153 sa_writel(dev, Mailbox0, command); 154 /* 155 * Write the parameters into Mailboxes 1 - 4 156 */ 157 sa_writel(dev, Mailbox1, p1); 158 sa_writel(dev, Mailbox2, p2); 159 sa_writel(dev, Mailbox3, p3); 160 sa_writel(dev, Mailbox4, p4); 161 162 /* 163 * Clear the synch command doorbell to start on a clean slate. 164 */ 165 sa_writew(dev, DoorbellClrReg_p, DOORBELL_0); 166 /* 167 * Signal that there is a new synch command 168 */ 169 sa_writew(dev, DoorbellReg_s, DOORBELL_0); 170 171 ok = 0; 172 start = jiffies; 173 174 while(time_before(jiffies, start+30*HZ)) 175 { 176 /* 177 * Delay 5uS so that the monitor gets access 178 */ 179 udelay(5); 180 /* 181 * Mon110 will set doorbell0 bit when it has 182 * completed the command. 183 */ 184 if(sa_readw(dev, DoorbellReg_p) & DOORBELL_0) { 185 ok = 1; 186 break; 187 } 188 msleep(1); 189 } 190 191 if (ok != 1) 192 return -ETIMEDOUT; 193 /* 194 * Clear the synch command doorbell. 195 */ 196 sa_writew(dev, DoorbellClrReg_p, DOORBELL_0); 197 /* 198 * Pull the synch status from Mailbox 0. 199 */ 200 if (ret) 201 *ret = sa_readl(dev, Mailbox0); 202 if (r1) 203 *r1 = sa_readl(dev, Mailbox1); 204 if (r2) 205 *r2 = sa_readl(dev, Mailbox2); 206 if (r3) 207 *r3 = sa_readl(dev, Mailbox3); 208 if (r4) 209 *r4 = sa_readl(dev, Mailbox4); 210 return 0; 211 } 212 213 /** 214 * aac_sa_interrupt_adapter - interrupt an adapter 215 * @dev: Which adapter to enable. 216 * 217 * Breakpoint an adapter. 218 */ 219 220 static void aac_sa_interrupt_adapter (struct aac_dev *dev) 221 { 222 sa_sync_cmd(dev, BREAKPOINT_REQUEST, 0, 0, 0, 0, 0, 0, 223 NULL, NULL, NULL, NULL, NULL); 224 } 225 226 /** 227 * aac_sa_start_adapter - activate adapter 228 * @dev: Adapter 229 * 230 * Start up processing on an ARM based AAC adapter 231 */ 232 233 static void aac_sa_start_adapter(struct aac_dev *dev) 234 { 235 union aac_init *init; 236 /* 237 * Fill in the remaining pieces of the init. 238 */ 239 init = dev->init; 240 init->r7.host_elapsed_seconds = cpu_to_le32(ktime_get_real_seconds()); 241 /* We can only use a 32 bit address here */ 242 sa_sync_cmd(dev, INIT_STRUCT_BASE_ADDRESS, 243 (u32)(ulong)dev->init_pa, 0, 0, 0, 0, 0, 244 NULL, NULL, NULL, NULL, NULL); 245 } 246 247 static int aac_sa_restart_adapter(struct aac_dev *dev, int bled, u8 reset_type) 248 { 249 return -EINVAL; 250 } 251 252 /** 253 * aac_sa_check_health 254 * @dev: device to check if healthy 255 * 256 * Will attempt to determine if the specified adapter is alive and 257 * capable of handling requests, returning 0 if alive. 258 */ 259 static int aac_sa_check_health(struct aac_dev *dev) 260 { 261 long status = sa_readl(dev, Mailbox7); 262 263 /* 264 * Check to see if the board failed any self tests. 265 */ 266 if (status & SELF_TEST_FAILED) 267 return -1; 268 /* 269 * Check to see if the board panic'd while booting. 270 */ 271 if (status & KERNEL_PANIC) 272 return -2; 273 /* 274 * Wait for the adapter to be up and running. Wait up to 3 minutes 275 */ 276 if (!(status & KERNEL_UP_AND_RUNNING)) 277 return -3; 278 /* 279 * Everything is OK 280 */ 281 return 0; 282 } 283 284 /** 285 * aac_sa_ioremap 286 * @size: mapping resize request 287 * 288 */ 289 static int aac_sa_ioremap(struct aac_dev * dev, u32 size) 290 { 291 if (!size) { 292 iounmap(dev->regs.sa); 293 return 0; 294 } 295 dev->base = dev->regs.sa = ioremap(dev->base_start, size); 296 return (dev->base == NULL) ? -1 : 0; 297 } 298 299 /** 300 * aac_sa_init - initialize an ARM based AAC card 301 * @dev: device to configure 302 * 303 * Allocate and set up resources for the ARM based AAC variants. The 304 * device_interface in the commregion will be allocated and linked 305 * to the comm region. 306 */ 307 308 int aac_sa_init(struct aac_dev *dev) 309 { 310 unsigned long start; 311 unsigned long status; 312 int instance; 313 const char *name; 314 315 instance = dev->id; 316 name = dev->name; 317 318 /* 319 * Fill in the function dispatch table. 320 */ 321 322 dev->a_ops.adapter_interrupt = aac_sa_interrupt_adapter; 323 dev->a_ops.adapter_disable_int = aac_sa_disable_interrupt; 324 dev->a_ops.adapter_enable_int = aac_sa_enable_interrupt; 325 dev->a_ops.adapter_notify = aac_sa_notify_adapter; 326 dev->a_ops.adapter_sync_cmd = sa_sync_cmd; 327 dev->a_ops.adapter_check_health = aac_sa_check_health; 328 dev->a_ops.adapter_restart = aac_sa_restart_adapter; 329 dev->a_ops.adapter_start = aac_sa_start_adapter; 330 dev->a_ops.adapter_intr = aac_sa_intr; 331 dev->a_ops.adapter_deliver = aac_rx_deliver_producer; 332 dev->a_ops.adapter_ioremap = aac_sa_ioremap; 333 334 if (aac_sa_ioremap(dev, dev->base_size)) { 335 printk(KERN_WARNING "%s: unable to map adapter.\n", name); 336 goto error_iounmap; 337 } 338 339 /* 340 * Check to see if the board failed any self tests. 341 */ 342 if (sa_readl(dev, Mailbox7) & SELF_TEST_FAILED) { 343 printk(KERN_WARNING "%s%d: adapter self-test failed.\n", name, instance); 344 goto error_iounmap; 345 } 346 /* 347 * Check to see if the board panic'd while booting. 348 */ 349 if (sa_readl(dev, Mailbox7) & KERNEL_PANIC) { 350 printk(KERN_WARNING "%s%d: adapter kernel panic'd.\n", name, instance); 351 goto error_iounmap; 352 } 353 start = jiffies; 354 /* 355 * Wait for the adapter to be up and running. Wait up to 3 minutes. 356 */ 357 while (!(sa_readl(dev, Mailbox7) & KERNEL_UP_AND_RUNNING)) { 358 if (time_after(jiffies, start+startup_timeout*HZ)) { 359 status = sa_readl(dev, Mailbox7); 360 printk(KERN_WARNING "%s%d: adapter kernel failed to start, init status = %lx.\n", 361 name, instance, status); 362 goto error_iounmap; 363 } 364 msleep(1); 365 } 366 367 /* 368 * First clear out all interrupts. Then enable the one's that 369 * we can handle. 370 */ 371 aac_adapter_disable_int(dev); 372 aac_adapter_enable_int(dev); 373 374 if(aac_init_adapter(dev) == NULL) 375 goto error_irq; 376 dev->sync_mode = 0; /* sync. mode not supported */ 377 if (request_irq(dev->pdev->irq, dev->a_ops.adapter_intr, 378 IRQF_SHARED, "aacraid", (void *)dev) < 0) { 379 printk(KERN_WARNING "%s%d: Interrupt unavailable.\n", 380 name, instance); 381 goto error_iounmap; 382 } 383 dev->dbg_base = dev->base_start; 384 dev->dbg_base_mapped = dev->base; 385 dev->dbg_size = dev->base_size; 386 387 aac_adapter_enable_int(dev); 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 error_irq: 397 aac_sa_disable_interrupt(dev); 398 free_irq(dev->pdev->irq, (void *)dev); 399 400 error_iounmap: 401 402 return -1; 403 } 404 405