aic79xx_osm.h 25 KB

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  1. /*
  2. * Adaptec AIC79xx device driver for Linux.
  3. *
  4. * Copyright (c) 2000-2001 Adaptec Inc.
  5. * All rights reserved.
  6. *
  7. * Redistribution and use in source and binary forms, with or without
  8. * modification, are permitted provided that the following conditions
  9. * are met:
  10. * 1. Redistributions of source code must retain the above copyright
  11. * notice, this list of conditions, and the following disclaimer,
  12. * without modification.
  13. * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  14. * substantially similar to the "NO WARRANTY" disclaimer below
  15. * ("Disclaimer") and any redistribution must be conditioned upon
  16. * including a substantially similar Disclaimer requirement for further
  17. * binary redistribution.
  18. * 3. Neither the names of the above-listed copyright holders nor the names
  19. * of any contributors may be used to endorse or promote products derived
  20. * from this software without specific prior written permission.
  21. *
  22. * Alternatively, this software may be distributed under the terms of the
  23. * GNU General Public License ("GPL") version 2 as published by the Free
  24. * Software Foundation.
  25. *
  26. * NO WARRANTY
  27. * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  28. * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  29. * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
  30. * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  31. * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  32. * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  33. * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  34. * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  35. * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  36. * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  37. * POSSIBILITY OF SUCH DAMAGES.
  38. *
  39. * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic79xx_osm.h#137 $
  40. *
  41. */
  42. #ifndef _AIC79XX_LINUX_H_
  43. #define _AIC79XX_LINUX_H_
  44. #include <linux/config.h>
  45. #include <linux/types.h>
  46. #include <linux/blkdev.h>
  47. #include <linux/delay.h>
  48. #include <linux/ioport.h>
  49. #include <linux/pci.h>
  50. #include <linux/smp_lock.h>
  51. #include <linux/version.h>
  52. #include <linux/interrupt.h>
  53. #include <linux/module.h>
  54. #include <linux/slab.h>
  55. #include <asm/byteorder.h>
  56. #include <asm/io.h>
  57. #include <scsi/scsi.h>
  58. #include <scsi/scsi_cmnd.h>
  59. #include <scsi/scsi_eh.h>
  60. #include <scsi/scsi_device.h>
  61. #include <scsi/scsi_host.h>
  62. #include <scsi/scsi_tcq.h>
  63. #include <scsi/scsi_transport.h>
  64. #include <scsi/scsi_transport_spi.h>
  65. /* Core SCSI definitions */
  66. #define AIC_LIB_PREFIX ahd
  67. /* Name space conflict with BSD queue macros */
  68. #ifdef LIST_HEAD
  69. #undef LIST_HEAD
  70. #endif
  71. #include "cam.h"
  72. #include "queue.h"
  73. #include "scsi_message.h"
  74. #include "scsi_iu.h"
  75. #include "aiclib.h"
  76. /*********************************** Debugging ********************************/
  77. #ifdef CONFIG_AIC79XX_DEBUG_ENABLE
  78. #ifdef CONFIG_AIC79XX_DEBUG_MASK
  79. #define AHD_DEBUG 1
  80. #define AHD_DEBUG_OPTS CONFIG_AIC79XX_DEBUG_MASK
  81. #else
  82. /*
  83. * Compile in debugging code, but do not enable any printfs.
  84. */
  85. #define AHD_DEBUG 1
  86. #define AHD_DEBUG_OPTS 0
  87. #endif
  88. /* No debugging code. */
  89. #endif
  90. /********************************** Misc Macros *******************************/
  91. #define roundup(x, y) ((((x)+((y)-1))/(y))*(y))
  92. #define powerof2(x) ((((x)-1)&(x))==0)
  93. /************************* Forward Declarations *******************************/
  94. struct ahd_softc;
  95. typedef struct pci_dev *ahd_dev_softc_t;
  96. typedef struct scsi_cmnd *ahd_io_ctx_t;
  97. /******************************* Byte Order ***********************************/
  98. #define ahd_htobe16(x) cpu_to_be16(x)
  99. #define ahd_htobe32(x) cpu_to_be32(x)
  100. #define ahd_htobe64(x) cpu_to_be64(x)
  101. #define ahd_htole16(x) cpu_to_le16(x)
  102. #define ahd_htole32(x) cpu_to_le32(x)
  103. #define ahd_htole64(x) cpu_to_le64(x)
  104. #define ahd_be16toh(x) be16_to_cpu(x)
  105. #define ahd_be32toh(x) be32_to_cpu(x)
  106. #define ahd_be64toh(x) be64_to_cpu(x)
  107. #define ahd_le16toh(x) le16_to_cpu(x)
  108. #define ahd_le32toh(x) le32_to_cpu(x)
  109. #define ahd_le64toh(x) le64_to_cpu(x)
  110. /************************* Configuration Data *********************************/
  111. extern uint32_t aic79xx_allow_memio;
  112. extern struct scsi_host_template aic79xx_driver_template;
  113. /***************************** Bus Space/DMA **********************************/
  114. typedef uint32_t bus_size_t;
  115. typedef enum {
  116. BUS_SPACE_MEMIO,
  117. BUS_SPACE_PIO
  118. } bus_space_tag_t;
  119. typedef union {
  120. u_long ioport;
  121. volatile uint8_t __iomem *maddr;
  122. } bus_space_handle_t;
  123. typedef struct bus_dma_segment
  124. {
  125. dma_addr_t ds_addr;
  126. bus_size_t ds_len;
  127. } bus_dma_segment_t;
  128. struct ahd_linux_dma_tag
  129. {
  130. bus_size_t alignment;
  131. bus_size_t boundary;
  132. bus_size_t maxsize;
  133. };
  134. typedef struct ahd_linux_dma_tag* bus_dma_tag_t;
  135. typedef dma_addr_t bus_dmamap_t;
  136. typedef int bus_dma_filter_t(void*, dma_addr_t);
  137. typedef void bus_dmamap_callback_t(void *, bus_dma_segment_t *, int, int);
  138. #define BUS_DMA_WAITOK 0x0
  139. #define BUS_DMA_NOWAIT 0x1
  140. #define BUS_DMA_ALLOCNOW 0x2
  141. #define BUS_DMA_LOAD_SEGS 0x4 /*
  142. * Argument is an S/G list not
  143. * a single buffer.
  144. */
  145. #define BUS_SPACE_MAXADDR 0xFFFFFFFF
  146. #define BUS_SPACE_MAXADDR_32BIT 0xFFFFFFFF
  147. #define BUS_SPACE_MAXSIZE_32BIT 0xFFFFFFFF
  148. int ahd_dma_tag_create(struct ahd_softc *, bus_dma_tag_t /*parent*/,
  149. bus_size_t /*alignment*/, bus_size_t /*boundary*/,
  150. dma_addr_t /*lowaddr*/, dma_addr_t /*highaddr*/,
  151. bus_dma_filter_t*/*filter*/, void */*filterarg*/,
  152. bus_size_t /*maxsize*/, int /*nsegments*/,
  153. bus_size_t /*maxsegsz*/, int /*flags*/,
  154. bus_dma_tag_t */*dma_tagp*/);
  155. void ahd_dma_tag_destroy(struct ahd_softc *, bus_dma_tag_t /*tag*/);
  156. int ahd_dmamem_alloc(struct ahd_softc *, bus_dma_tag_t /*dmat*/,
  157. void** /*vaddr*/, int /*flags*/,
  158. bus_dmamap_t* /*mapp*/);
  159. void ahd_dmamem_free(struct ahd_softc *, bus_dma_tag_t /*dmat*/,
  160. void* /*vaddr*/, bus_dmamap_t /*map*/);
  161. void ahd_dmamap_destroy(struct ahd_softc *, bus_dma_tag_t /*tag*/,
  162. bus_dmamap_t /*map*/);
  163. int ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t /*dmat*/,
  164. bus_dmamap_t /*map*/, void * /*buf*/,
  165. bus_size_t /*buflen*/, bus_dmamap_callback_t *,
  166. void */*callback_arg*/, int /*flags*/);
  167. int ahd_dmamap_unload(struct ahd_softc *, bus_dma_tag_t, bus_dmamap_t);
  168. /*
  169. * Operations performed by ahd_dmamap_sync().
  170. */
  171. #define BUS_DMASYNC_PREREAD 0x01 /* pre-read synchronization */
  172. #define BUS_DMASYNC_POSTREAD 0x02 /* post-read synchronization */
  173. #define BUS_DMASYNC_PREWRITE 0x04 /* pre-write synchronization */
  174. #define BUS_DMASYNC_POSTWRITE 0x08 /* post-write synchronization */
  175. /*
  176. * XXX
  177. * ahd_dmamap_sync is only used on buffers allocated with
  178. * the pci_alloc_consistent() API. Although I'm not sure how
  179. * this works on architectures with a write buffer, Linux does
  180. * not have an API to sync "coherent" memory. Perhaps we need
  181. * to do an mb()?
  182. */
  183. #define ahd_dmamap_sync(ahd, dma_tag, dmamap, offset, len, op)
  184. /************************** Timer DataStructures ******************************/
  185. typedef struct timer_list ahd_timer_t;
  186. /********************************** Includes **********************************/
  187. #ifdef CONFIG_AIC79XX_REG_PRETTY_PRINT
  188. #define AIC_DEBUG_REGISTERS 1
  189. #else
  190. #define AIC_DEBUG_REGISTERS 0
  191. #endif
  192. #include "aic79xx.h"
  193. /***************************** Timer Facilities *******************************/
  194. #define ahd_timer_init init_timer
  195. #define ahd_timer_stop del_timer_sync
  196. typedef void ahd_linux_callback_t (u_long);
  197. static __inline void ahd_timer_reset(ahd_timer_t *timer, int usec,
  198. ahd_callback_t *func, void *arg);
  199. static __inline void ahd_scb_timer_reset(struct scb *scb, u_int usec);
  200. static __inline void
  201. ahd_timer_reset(ahd_timer_t *timer, int usec, ahd_callback_t *func, void *arg)
  202. {
  203. struct ahd_softc *ahd;
  204. ahd = (struct ahd_softc *)arg;
  205. del_timer(timer);
  206. timer->data = (u_long)arg;
  207. timer->expires = jiffies + (usec * HZ)/1000000;
  208. timer->function = (ahd_linux_callback_t*)func;
  209. add_timer(timer);
  210. }
  211. static __inline void
  212. ahd_scb_timer_reset(struct scb *scb, u_int usec)
  213. {
  214. mod_timer(&scb->io_ctx->eh_timeout, jiffies + (usec * HZ)/1000000);
  215. }
  216. /***************************** SMP support ************************************/
  217. #include <linux/spinlock.h>
  218. #define AIC79XX_DRIVER_VERSION "1.3.11"
  219. /*************************** Device Data Structures ***************************/
  220. /*
  221. * A per probed device structure used to deal with some error recovery
  222. * scenarios that the Linux mid-layer code just doesn't know how to
  223. * handle. The structure allocated for a device only becomes persistent
  224. * after a successfully completed inquiry command to the target when
  225. * that inquiry data indicates a lun is present.
  226. */
  227. typedef enum {
  228. AHD_DEV_FREEZE_TIL_EMPTY = 0x02, /* Freeze queue until active == 0 */
  229. AHD_DEV_Q_BASIC = 0x10, /* Allow basic device queuing */
  230. AHD_DEV_Q_TAGGED = 0x20, /* Allow full SCSI2 command queueing */
  231. AHD_DEV_PERIODIC_OTAG = 0x40, /* Send OTAG to prevent starvation */
  232. } ahd_linux_dev_flags;
  233. struct ahd_linux_target;
  234. struct ahd_linux_device {
  235. TAILQ_ENTRY(ahd_linux_device) links;
  236. /*
  237. * The number of transactions currently
  238. * queued to the device.
  239. */
  240. int active;
  241. /*
  242. * The currently allowed number of
  243. * transactions that can be queued to
  244. * the device. Must be signed for
  245. * conversion from tagged to untagged
  246. * mode where the device may have more
  247. * than one outstanding active transaction.
  248. */
  249. int openings;
  250. /*
  251. * A positive count indicates that this
  252. * device's queue is halted.
  253. */
  254. u_int qfrozen;
  255. /*
  256. * Cumulative command counter.
  257. */
  258. u_long commands_issued;
  259. /*
  260. * The number of tagged transactions when
  261. * running at our current opening level
  262. * that have been successfully received by
  263. * this device since the last QUEUE FULL.
  264. */
  265. u_int tag_success_count;
  266. #define AHD_TAG_SUCCESS_INTERVAL 50
  267. ahd_linux_dev_flags flags;
  268. /*
  269. * Per device timer.
  270. */
  271. struct timer_list timer;
  272. /*
  273. * The high limit for the tags variable.
  274. */
  275. u_int maxtags;
  276. /*
  277. * The computed number of tags outstanding
  278. * at the time of the last QUEUE FULL event.
  279. */
  280. u_int tags_on_last_queuefull;
  281. /*
  282. * How many times we have seen a queue full
  283. * with the same number of tags. This is used
  284. * to stop our adaptive queue depth algorithm
  285. * on devices with a fixed number of tags.
  286. */
  287. u_int last_queuefull_same_count;
  288. #define AHD_LOCK_TAGS_COUNT 50
  289. /*
  290. * How many transactions have been queued
  291. * without the device going idle. We use
  292. * this statistic to determine when to issue
  293. * an ordered tag to prevent transaction
  294. * starvation. This statistic is only updated
  295. * if the AHD_DEV_PERIODIC_OTAG flag is set
  296. * on this device.
  297. */
  298. u_int commands_since_idle_or_otag;
  299. #define AHD_OTAG_THRESH 500
  300. };
  301. struct ahd_linux_target {
  302. struct scsi_device *sdev[AHD_NUM_LUNS];
  303. struct ahd_transinfo last_tinfo;
  304. struct ahd_softc *ahd;
  305. };
  306. /********************* Definitions Required by the Core ***********************/
  307. /*
  308. * Number of SG segments we require. So long as the S/G segments for
  309. * a particular transaction are allocated in a physically contiguous
  310. * manner and are allocated below 4GB, the number of S/G segments is
  311. * unrestricted.
  312. */
  313. #define AHD_NSEG 128
  314. /*
  315. * Per-SCB OSM storage.
  316. */
  317. struct scb_platform_data {
  318. struct ahd_linux_device *dev;
  319. dma_addr_t buf_busaddr;
  320. uint32_t xfer_len;
  321. uint32_t sense_resid; /* Auto-Sense residual */
  322. };
  323. /*
  324. * Define a structure used for each host adapter. All members are
  325. * aligned on a boundary >= the size of the member to honor the
  326. * alignment restrictions of the various platforms supported by
  327. * this driver.
  328. */
  329. struct ahd_platform_data {
  330. /*
  331. * Fields accessed from interrupt context.
  332. */
  333. struct scsi_target *starget[AHD_NUM_TARGETS];
  334. spinlock_t spin_lock;
  335. u_int qfrozen;
  336. struct timer_list reset_timer;
  337. struct semaphore eh_sem;
  338. struct Scsi_Host *host; /* pointer to scsi host */
  339. #define AHD_LINUX_NOIRQ ((uint32_t)~0)
  340. uint32_t irq; /* IRQ for this adapter */
  341. uint32_t bios_address;
  342. uint32_t mem_busaddr; /* Mem Base Addr */
  343. #define AHD_SCB_UP_EH_SEM 0x1
  344. uint32_t flags;
  345. };
  346. /************************** OS Utility Wrappers *******************************/
  347. #define printf printk
  348. #define M_NOWAIT GFP_ATOMIC
  349. #define M_WAITOK 0
  350. #define malloc(size, type, flags) kmalloc(size, flags)
  351. #define free(ptr, type) kfree(ptr)
  352. static __inline void ahd_delay(long);
  353. static __inline void
  354. ahd_delay(long usec)
  355. {
  356. /*
  357. * udelay on Linux can have problems for
  358. * multi-millisecond waits. Wait at most
  359. * 1024us per call.
  360. */
  361. while (usec > 0) {
  362. udelay(usec % 1024);
  363. usec -= 1024;
  364. }
  365. }
  366. /***************************** Low Level I/O **********************************/
  367. static __inline uint8_t ahd_inb(struct ahd_softc * ahd, long port);
  368. static __inline uint16_t ahd_inw_atomic(struct ahd_softc * ahd, long port);
  369. static __inline void ahd_outb(struct ahd_softc * ahd, long port, uint8_t val);
  370. static __inline void ahd_outw_atomic(struct ahd_softc * ahd,
  371. long port, uint16_t val);
  372. static __inline void ahd_outsb(struct ahd_softc * ahd, long port,
  373. uint8_t *, int count);
  374. static __inline void ahd_insb(struct ahd_softc * ahd, long port,
  375. uint8_t *, int count);
  376. static __inline uint8_t
  377. ahd_inb(struct ahd_softc * ahd, long port)
  378. {
  379. uint8_t x;
  380. if (ahd->tags[0] == BUS_SPACE_MEMIO) {
  381. x = readb(ahd->bshs[0].maddr + port);
  382. } else {
  383. x = inb(ahd->bshs[(port) >> 8].ioport + ((port) & 0xFF));
  384. }
  385. mb();
  386. return (x);
  387. }
  388. static __inline uint16_t
  389. ahd_inw_atomic(struct ahd_softc * ahd, long port)
  390. {
  391. uint8_t x;
  392. if (ahd->tags[0] == BUS_SPACE_MEMIO) {
  393. x = readw(ahd->bshs[0].maddr + port);
  394. } else {
  395. x = inw(ahd->bshs[(port) >> 8].ioport + ((port) & 0xFF));
  396. }
  397. mb();
  398. return (x);
  399. }
  400. static __inline void
  401. ahd_outb(struct ahd_softc * ahd, long port, uint8_t val)
  402. {
  403. if (ahd->tags[0] == BUS_SPACE_MEMIO) {
  404. writeb(val, ahd->bshs[0].maddr + port);
  405. } else {
  406. outb(val, ahd->bshs[(port) >> 8].ioport + (port & 0xFF));
  407. }
  408. mb();
  409. }
  410. static __inline void
  411. ahd_outw_atomic(struct ahd_softc * ahd, long port, uint16_t val)
  412. {
  413. if (ahd->tags[0] == BUS_SPACE_MEMIO) {
  414. writew(val, ahd->bshs[0].maddr + port);
  415. } else {
  416. outw(val, ahd->bshs[(port) >> 8].ioport + (port & 0xFF));
  417. }
  418. mb();
  419. }
  420. static __inline void
  421. ahd_outsb(struct ahd_softc * ahd, long port, uint8_t *array, int count)
  422. {
  423. int i;
  424. /*
  425. * There is probably a more efficient way to do this on Linux
  426. * but we don't use this for anything speed critical and this
  427. * should work.
  428. */
  429. for (i = 0; i < count; i++)
  430. ahd_outb(ahd, port, *array++);
  431. }
  432. static __inline void
  433. ahd_insb(struct ahd_softc * ahd, long port, uint8_t *array, int count)
  434. {
  435. int i;
  436. /*
  437. * There is probably a more efficient way to do this on Linux
  438. * but we don't use this for anything speed critical and this
  439. * should work.
  440. */
  441. for (i = 0; i < count; i++)
  442. *array++ = ahd_inb(ahd, port);
  443. }
  444. /**************************** Initialization **********************************/
  445. int ahd_linux_register_host(struct ahd_softc *,
  446. struct scsi_host_template *);
  447. uint64_t ahd_linux_get_memsize(void);
  448. /*************************** Pretty Printing **********************************/
  449. struct info_str {
  450. char *buffer;
  451. int length;
  452. off_t offset;
  453. int pos;
  454. };
  455. void ahd_format_transinfo(struct info_str *info,
  456. struct ahd_transinfo *tinfo);
  457. /******************************** Locking *************************************/
  458. static __inline void
  459. ahd_lockinit(struct ahd_softc *ahd)
  460. {
  461. spin_lock_init(&ahd->platform_data->spin_lock);
  462. }
  463. static __inline void
  464. ahd_lock(struct ahd_softc *ahd, unsigned long *flags)
  465. {
  466. spin_lock_irqsave(&ahd->platform_data->spin_lock, *flags);
  467. }
  468. static __inline void
  469. ahd_unlock(struct ahd_softc *ahd, unsigned long *flags)
  470. {
  471. spin_unlock_irqrestore(&ahd->platform_data->spin_lock, *flags);
  472. }
  473. /******************************* PCI Definitions ******************************/
  474. /*
  475. * PCIM_xxx: mask to locate subfield in register
  476. * PCIR_xxx: config register offset
  477. * PCIC_xxx: device class
  478. * PCIS_xxx: device subclass
  479. * PCIP_xxx: device programming interface
  480. * PCIV_xxx: PCI vendor ID (only required to fixup ancient devices)
  481. * PCID_xxx: device ID
  482. */
  483. #define PCIR_DEVVENDOR 0x00
  484. #define PCIR_VENDOR 0x00
  485. #define PCIR_DEVICE 0x02
  486. #define PCIR_COMMAND 0x04
  487. #define PCIM_CMD_PORTEN 0x0001
  488. #define PCIM_CMD_MEMEN 0x0002
  489. #define PCIM_CMD_BUSMASTEREN 0x0004
  490. #define PCIM_CMD_MWRICEN 0x0010
  491. #define PCIM_CMD_PERRESPEN 0x0040
  492. #define PCIM_CMD_SERRESPEN 0x0100
  493. #define PCIR_STATUS 0x06
  494. #define PCIR_REVID 0x08
  495. #define PCIR_PROGIF 0x09
  496. #define PCIR_SUBCLASS 0x0a
  497. #define PCIR_CLASS 0x0b
  498. #define PCIR_CACHELNSZ 0x0c
  499. #define PCIR_LATTIMER 0x0d
  500. #define PCIR_HEADERTYPE 0x0e
  501. #define PCIM_MFDEV 0x80
  502. #define PCIR_BIST 0x0f
  503. #define PCIR_CAP_PTR 0x34
  504. /* config registers for header type 0 devices */
  505. #define PCIR_MAPS 0x10
  506. #define PCIR_SUBVEND_0 0x2c
  507. #define PCIR_SUBDEV_0 0x2e
  508. /****************************** PCI-X definitions *****************************/
  509. #define PCIXR_COMMAND 0x96
  510. #define PCIXR_DEVADDR 0x98
  511. #define PCIXM_DEVADDR_FNUM 0x0003 /* Function Number */
  512. #define PCIXM_DEVADDR_DNUM 0x00F8 /* Device Number */
  513. #define PCIXM_DEVADDR_BNUM 0xFF00 /* Bus Number */
  514. #define PCIXR_STATUS 0x9A
  515. #define PCIXM_STATUS_64BIT 0x0001 /* Active 64bit connection to device. */
  516. #define PCIXM_STATUS_133CAP 0x0002 /* Device is 133MHz capable */
  517. #define PCIXM_STATUS_SCDISC 0x0004 /* Split Completion Discarded */
  518. #define PCIXM_STATUS_UNEXPSC 0x0008 /* Unexpected Split Completion */
  519. #define PCIXM_STATUS_CMPLEXDEV 0x0010 /* Device Complexity (set == bridge) */
  520. #define PCIXM_STATUS_MAXMRDBC 0x0060 /* Maximum Burst Read Count */
  521. #define PCIXM_STATUS_MAXSPLITS 0x0380 /* Maximum Split Transactions */
  522. #define PCIXM_STATUS_MAXCRDS 0x1C00 /* Maximum Cumulative Read Size */
  523. #define PCIXM_STATUS_RCVDSCEM 0x2000 /* Received a Split Comp w/Error msg */
  524. extern struct pci_driver aic79xx_pci_driver;
  525. typedef enum
  526. {
  527. AHD_POWER_STATE_D0,
  528. AHD_POWER_STATE_D1,
  529. AHD_POWER_STATE_D2,
  530. AHD_POWER_STATE_D3
  531. } ahd_power_state;
  532. void ahd_power_state_change(struct ahd_softc *ahd,
  533. ahd_power_state new_state);
  534. /******************************* PCI Routines *********************************/
  535. int ahd_linux_pci_init(void);
  536. void ahd_linux_pci_exit(void);
  537. int ahd_pci_map_registers(struct ahd_softc *ahd);
  538. int ahd_pci_map_int(struct ahd_softc *ahd);
  539. static __inline uint32_t ahd_pci_read_config(ahd_dev_softc_t pci,
  540. int reg, int width);
  541. static __inline uint32_t
  542. ahd_pci_read_config(ahd_dev_softc_t pci, int reg, int width)
  543. {
  544. switch (width) {
  545. case 1:
  546. {
  547. uint8_t retval;
  548. pci_read_config_byte(pci, reg, &retval);
  549. return (retval);
  550. }
  551. case 2:
  552. {
  553. uint16_t retval;
  554. pci_read_config_word(pci, reg, &retval);
  555. return (retval);
  556. }
  557. case 4:
  558. {
  559. uint32_t retval;
  560. pci_read_config_dword(pci, reg, &retval);
  561. return (retval);
  562. }
  563. default:
  564. panic("ahd_pci_read_config: Read size too big");
  565. /* NOTREACHED */
  566. return (0);
  567. }
  568. }
  569. static __inline void ahd_pci_write_config(ahd_dev_softc_t pci,
  570. int reg, uint32_t value,
  571. int width);
  572. static __inline void
  573. ahd_pci_write_config(ahd_dev_softc_t pci, int reg, uint32_t value, int width)
  574. {
  575. switch (width) {
  576. case 1:
  577. pci_write_config_byte(pci, reg, value);
  578. break;
  579. case 2:
  580. pci_write_config_word(pci, reg, value);
  581. break;
  582. case 4:
  583. pci_write_config_dword(pci, reg, value);
  584. break;
  585. default:
  586. panic("ahd_pci_write_config: Write size too big");
  587. /* NOTREACHED */
  588. }
  589. }
  590. static __inline int ahd_get_pci_function(ahd_dev_softc_t);
  591. static __inline int
  592. ahd_get_pci_function(ahd_dev_softc_t pci)
  593. {
  594. return (PCI_FUNC(pci->devfn));
  595. }
  596. static __inline int ahd_get_pci_slot(ahd_dev_softc_t);
  597. static __inline int
  598. ahd_get_pci_slot(ahd_dev_softc_t pci)
  599. {
  600. return (PCI_SLOT(pci->devfn));
  601. }
  602. static __inline int ahd_get_pci_bus(ahd_dev_softc_t);
  603. static __inline int
  604. ahd_get_pci_bus(ahd_dev_softc_t pci)
  605. {
  606. return (pci->bus->number);
  607. }
  608. static __inline void ahd_flush_device_writes(struct ahd_softc *);
  609. static __inline void
  610. ahd_flush_device_writes(struct ahd_softc *ahd)
  611. {
  612. /* XXX Is this sufficient for all architectures??? */
  613. ahd_inb(ahd, INTSTAT);
  614. }
  615. /**************************** Proc FS Support *********************************/
  616. int ahd_linux_proc_info(struct Scsi_Host *, char *, char **,
  617. off_t, int, int);
  618. /*********************** Transaction Access Wrappers **************************/
  619. static __inline void ahd_cmd_set_transaction_status(struct scsi_cmnd *, uint32_t);
  620. static __inline void ahd_set_transaction_status(struct scb *, uint32_t);
  621. static __inline void ahd_cmd_set_scsi_status(struct scsi_cmnd *, uint32_t);
  622. static __inline void ahd_set_scsi_status(struct scb *, uint32_t);
  623. static __inline uint32_t ahd_cmd_get_transaction_status(struct scsi_cmnd *cmd);
  624. static __inline uint32_t ahd_get_transaction_status(struct scb *);
  625. static __inline uint32_t ahd_cmd_get_scsi_status(struct scsi_cmnd *cmd);
  626. static __inline uint32_t ahd_get_scsi_status(struct scb *);
  627. static __inline void ahd_set_transaction_tag(struct scb *, int, u_int);
  628. static __inline u_long ahd_get_transfer_length(struct scb *);
  629. static __inline int ahd_get_transfer_dir(struct scb *);
  630. static __inline void ahd_set_residual(struct scb *, u_long);
  631. static __inline void ahd_set_sense_residual(struct scb *scb, u_long resid);
  632. static __inline u_long ahd_get_residual(struct scb *);
  633. static __inline u_long ahd_get_sense_residual(struct scb *);
  634. static __inline int ahd_perform_autosense(struct scb *);
  635. static __inline uint32_t ahd_get_sense_bufsize(struct ahd_softc *,
  636. struct scb *);
  637. static __inline void ahd_notify_xfer_settings_change(struct ahd_softc *,
  638. struct ahd_devinfo *);
  639. static __inline void ahd_platform_scb_free(struct ahd_softc *ahd,
  640. struct scb *scb);
  641. static __inline void ahd_freeze_scb(struct scb *scb);
  642. static __inline
  643. void ahd_cmd_set_transaction_status(struct scsi_cmnd *cmd, uint32_t status)
  644. {
  645. cmd->result &= ~(CAM_STATUS_MASK << 16);
  646. cmd->result |= status << 16;
  647. }
  648. static __inline
  649. void ahd_set_transaction_status(struct scb *scb, uint32_t status)
  650. {
  651. ahd_cmd_set_transaction_status(scb->io_ctx,status);
  652. }
  653. static __inline
  654. void ahd_cmd_set_scsi_status(struct scsi_cmnd *cmd, uint32_t status)
  655. {
  656. cmd->result &= ~0xFFFF;
  657. cmd->result |= status;
  658. }
  659. static __inline
  660. void ahd_set_scsi_status(struct scb *scb, uint32_t status)
  661. {
  662. ahd_cmd_set_scsi_status(scb->io_ctx, status);
  663. }
  664. static __inline
  665. uint32_t ahd_cmd_get_transaction_status(struct scsi_cmnd *cmd)
  666. {
  667. return ((cmd->result >> 16) & CAM_STATUS_MASK);
  668. }
  669. static __inline
  670. uint32_t ahd_get_transaction_status(struct scb *scb)
  671. {
  672. return (ahd_cmd_get_transaction_status(scb->io_ctx));
  673. }
  674. static __inline
  675. uint32_t ahd_cmd_get_scsi_status(struct scsi_cmnd *cmd)
  676. {
  677. return (cmd->result & 0xFFFF);
  678. }
  679. static __inline
  680. uint32_t ahd_get_scsi_status(struct scb *scb)
  681. {
  682. return (ahd_cmd_get_scsi_status(scb->io_ctx));
  683. }
  684. static __inline
  685. void ahd_set_transaction_tag(struct scb *scb, int enabled, u_int type)
  686. {
  687. /*
  688. * Nothing to do for linux as the incoming transaction
  689. * has no concept of tag/non tagged, etc.
  690. */
  691. }
  692. static __inline
  693. u_long ahd_get_transfer_length(struct scb *scb)
  694. {
  695. return (scb->platform_data->xfer_len);
  696. }
  697. static __inline
  698. int ahd_get_transfer_dir(struct scb *scb)
  699. {
  700. return (scb->io_ctx->sc_data_direction);
  701. }
  702. static __inline
  703. void ahd_set_residual(struct scb *scb, u_long resid)
  704. {
  705. scb->io_ctx->resid = resid;
  706. }
  707. static __inline
  708. void ahd_set_sense_residual(struct scb *scb, u_long resid)
  709. {
  710. scb->platform_data->sense_resid = resid;
  711. }
  712. static __inline
  713. u_long ahd_get_residual(struct scb *scb)
  714. {
  715. return (scb->io_ctx->resid);
  716. }
  717. static __inline
  718. u_long ahd_get_sense_residual(struct scb *scb)
  719. {
  720. return (scb->platform_data->sense_resid);
  721. }
  722. static __inline
  723. int ahd_perform_autosense(struct scb *scb)
  724. {
  725. /*
  726. * We always perform autosense in Linux.
  727. * On other platforms this is set on a
  728. * per-transaction basis.
  729. */
  730. return (1);
  731. }
  732. static __inline uint32_t
  733. ahd_get_sense_bufsize(struct ahd_softc *ahd, struct scb *scb)
  734. {
  735. return (sizeof(struct scsi_sense_data));
  736. }
  737. static __inline void
  738. ahd_notify_xfer_settings_change(struct ahd_softc *ahd,
  739. struct ahd_devinfo *devinfo)
  740. {
  741. /* Nothing to do here for linux */
  742. }
  743. static __inline void
  744. ahd_platform_scb_free(struct ahd_softc *ahd, struct scb *scb)
  745. {
  746. ahd->flags &= ~AHD_RESOURCE_SHORTAGE;
  747. }
  748. int ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg);
  749. void ahd_platform_free(struct ahd_softc *ahd);
  750. void ahd_platform_init(struct ahd_softc *ahd);
  751. void ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb);
  752. void ahd_freeze_simq(struct ahd_softc *ahd);
  753. void ahd_release_simq(struct ahd_softc *ahd);
  754. static __inline void
  755. ahd_freeze_scb(struct scb *scb)
  756. {
  757. if ((scb->io_ctx->result & (CAM_DEV_QFRZN << 16)) == 0) {
  758. scb->io_ctx->result |= CAM_DEV_QFRZN << 16;
  759. scb->platform_data->dev->qfrozen++;
  760. }
  761. }
  762. void ahd_platform_set_tags(struct ahd_softc *ahd,
  763. struct ahd_devinfo *devinfo, ahd_queue_alg);
  764. int ahd_platform_abort_scbs(struct ahd_softc *ahd, int target,
  765. char channel, int lun, u_int tag,
  766. role_t role, uint32_t status);
  767. irqreturn_t
  768. ahd_linux_isr(int irq, void *dev_id, struct pt_regs * regs);
  769. void ahd_platform_flushwork(struct ahd_softc *ahd);
  770. int ahd_softc_comp(struct ahd_softc *, struct ahd_softc *);
  771. void ahd_done(struct ahd_softc*, struct scb*);
  772. void ahd_send_async(struct ahd_softc *, char channel,
  773. u_int target, u_int lun, ac_code, void *);
  774. void ahd_print_path(struct ahd_softc *, struct scb *);
  775. #ifdef CONFIG_PCI
  776. #define AHD_PCI_CONFIG 1
  777. #else
  778. #define AHD_PCI_CONFIG 0
  779. #endif
  780. #define bootverbose aic79xx_verbose
  781. extern uint32_t aic79xx_verbose;
  782. #endif /* _AIC79XX_LINUX_H_ */