sa.c 9.8 KB

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