aic79xx_osm.h 24 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#166 $
  40. *
  41. */
  42. #ifndef _AIC79XX_LINUX_H_
  43. #define _AIC79XX_LINUX_H_
  44. #include <linux/types.h>
  45. #include <linux/blkdev.h>
  46. #include <linux/delay.h>
  47. #include <linux/ioport.h>
  48. #include <linux/pci.h>
  49. #include <linux/interrupt.h>
  50. #include <linux/module.h>
  51. #include <linux/slab.h>
  52. #include <asm/byteorder.h>
  53. #include <asm/io.h>
  54. #include <scsi/scsi.h>
  55. #include <scsi/scsi_cmnd.h>
  56. #include <scsi/scsi_eh.h>
  57. #include <scsi/scsi_device.h>
  58. #include <scsi/scsi_host.h>
  59. #include <scsi/scsi_tcq.h>
  60. #include <scsi/scsi_transport.h>
  61. #include <scsi/scsi_transport_spi.h>
  62. /* Core SCSI definitions */
  63. #define AIC_LIB_PREFIX ahd
  64. /* Name space conflict with BSD queue macros */
  65. #ifdef LIST_HEAD
  66. #undef LIST_HEAD
  67. #endif
  68. #include "cam.h"
  69. #include "queue.h"
  70. #include "scsi_message.h"
  71. #include "scsi_iu.h"
  72. #include "aiclib.h"
  73. /*********************************** Debugging ********************************/
  74. #ifdef CONFIG_AIC79XX_DEBUG_ENABLE
  75. #ifdef CONFIG_AIC79XX_DEBUG_MASK
  76. #define AHD_DEBUG 1
  77. #define AHD_DEBUG_OPTS CONFIG_AIC79XX_DEBUG_MASK
  78. #else
  79. /*
  80. * Compile in debugging code, but do not enable any printfs.
  81. */
  82. #define AHD_DEBUG 1
  83. #define AHD_DEBUG_OPTS 0
  84. #endif
  85. /* No debugging code. */
  86. #endif
  87. /********************************** Misc Macros *******************************/
  88. #define powerof2(x) ((((x)-1)&(x))==0)
  89. /************************* Forward Declarations *******************************/
  90. struct ahd_softc;
  91. typedef struct pci_dev *ahd_dev_softc_t;
  92. typedef struct scsi_cmnd *ahd_io_ctx_t;
  93. /******************************* Byte Order ***********************************/
  94. #define ahd_htobe16(x) cpu_to_be16(x)
  95. #define ahd_htobe32(x) cpu_to_be32(x)
  96. #define ahd_htobe64(x) cpu_to_be64(x)
  97. #define ahd_htole16(x) cpu_to_le16(x)
  98. #define ahd_htole32(x) cpu_to_le32(x)
  99. #define ahd_htole64(x) cpu_to_le64(x)
  100. #define ahd_be16toh(x) be16_to_cpu(x)
  101. #define ahd_be32toh(x) be32_to_cpu(x)
  102. #define ahd_be64toh(x) be64_to_cpu(x)
  103. #define ahd_le16toh(x) le16_to_cpu(x)
  104. #define ahd_le32toh(x) le32_to_cpu(x)
  105. #define ahd_le64toh(x) le64_to_cpu(x)
  106. /************************* Configuration Data *********************************/
  107. extern uint32_t aic79xx_allow_memio;
  108. extern struct scsi_host_template aic79xx_driver_template;
  109. /***************************** Bus Space/DMA **********************************/
  110. typedef uint32_t bus_size_t;
  111. typedef enum {
  112. BUS_SPACE_MEMIO,
  113. BUS_SPACE_PIO
  114. } bus_space_tag_t;
  115. typedef union {
  116. u_long ioport;
  117. volatile uint8_t __iomem *maddr;
  118. } bus_space_handle_t;
  119. typedef struct bus_dma_segment
  120. {
  121. dma_addr_t ds_addr;
  122. bus_size_t ds_len;
  123. } bus_dma_segment_t;
  124. struct ahd_linux_dma_tag
  125. {
  126. bus_size_t alignment;
  127. bus_size_t boundary;
  128. bus_size_t maxsize;
  129. };
  130. typedef struct ahd_linux_dma_tag* bus_dma_tag_t;
  131. typedef dma_addr_t bus_dmamap_t;
  132. typedef int bus_dma_filter_t(void*, dma_addr_t);
  133. typedef void bus_dmamap_callback_t(void *, bus_dma_segment_t *, int, int);
  134. #define BUS_DMA_WAITOK 0x0
  135. #define BUS_DMA_NOWAIT 0x1
  136. #define BUS_DMA_ALLOCNOW 0x2
  137. #define BUS_DMA_LOAD_SEGS 0x4 /*
  138. * Argument is an S/G list not
  139. * a single buffer.
  140. */
  141. #define BUS_SPACE_MAXADDR 0xFFFFFFFF
  142. #define BUS_SPACE_MAXADDR_32BIT 0xFFFFFFFF
  143. #define BUS_SPACE_MAXSIZE_32BIT 0xFFFFFFFF
  144. int ahd_dma_tag_create(struct ahd_softc *, bus_dma_tag_t /*parent*/,
  145. bus_size_t /*alignment*/, bus_size_t /*boundary*/,
  146. dma_addr_t /*lowaddr*/, dma_addr_t /*highaddr*/,
  147. bus_dma_filter_t*/*filter*/, void */*filterarg*/,
  148. bus_size_t /*maxsize*/, int /*nsegments*/,
  149. bus_size_t /*maxsegsz*/, int /*flags*/,
  150. bus_dma_tag_t */*dma_tagp*/);
  151. void ahd_dma_tag_destroy(struct ahd_softc *, bus_dma_tag_t /*tag*/);
  152. int ahd_dmamem_alloc(struct ahd_softc *, bus_dma_tag_t /*dmat*/,
  153. void** /*vaddr*/, int /*flags*/,
  154. bus_dmamap_t* /*mapp*/);
  155. void ahd_dmamem_free(struct ahd_softc *, bus_dma_tag_t /*dmat*/,
  156. void* /*vaddr*/, bus_dmamap_t /*map*/);
  157. void ahd_dmamap_destroy(struct ahd_softc *, bus_dma_tag_t /*tag*/,
  158. bus_dmamap_t /*map*/);
  159. int ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t /*dmat*/,
  160. bus_dmamap_t /*map*/, void * /*buf*/,
  161. bus_size_t /*buflen*/, bus_dmamap_callback_t *,
  162. void */*callback_arg*/, int /*flags*/);
  163. int ahd_dmamap_unload(struct ahd_softc *, bus_dma_tag_t, bus_dmamap_t);
  164. /*
  165. * Operations performed by ahd_dmamap_sync().
  166. */
  167. #define BUS_DMASYNC_PREREAD 0x01 /* pre-read synchronization */
  168. #define BUS_DMASYNC_POSTREAD 0x02 /* post-read synchronization */
  169. #define BUS_DMASYNC_PREWRITE 0x04 /* pre-write synchronization */
  170. #define BUS_DMASYNC_POSTWRITE 0x08 /* post-write synchronization */
  171. /*
  172. * XXX
  173. * ahd_dmamap_sync is only used on buffers allocated with
  174. * the pci_alloc_consistent() API. Although I'm not sure how
  175. * this works on architectures with a write buffer, Linux does
  176. * not have an API to sync "coherent" memory. Perhaps we need
  177. * to do an mb()?
  178. */
  179. #define ahd_dmamap_sync(ahd, dma_tag, dmamap, offset, len, op)
  180. /************************** Timer DataStructures ******************************/
  181. typedef struct timer_list ahd_timer_t;
  182. /********************************** Includes **********************************/
  183. #ifdef CONFIG_AIC79XX_REG_PRETTY_PRINT
  184. #define AIC_DEBUG_REGISTERS 1
  185. #else
  186. #define AIC_DEBUG_REGISTERS 0
  187. #endif
  188. #include "aic79xx.h"
  189. /***************************** Timer Facilities *******************************/
  190. #define ahd_timer_init init_timer
  191. #define ahd_timer_stop del_timer_sync
  192. typedef void ahd_linux_callback_t (u_long);
  193. static __inline void ahd_timer_reset(ahd_timer_t *timer, int usec,
  194. ahd_callback_t *func, void *arg);
  195. static __inline void
  196. ahd_timer_reset(ahd_timer_t *timer, int usec, ahd_callback_t *func, void *arg)
  197. {
  198. struct ahd_softc *ahd;
  199. ahd = (struct ahd_softc *)arg;
  200. del_timer(timer);
  201. timer->data = (u_long)arg;
  202. timer->expires = jiffies + (usec * HZ)/1000000;
  203. timer->function = (ahd_linux_callback_t*)func;
  204. add_timer(timer);
  205. }
  206. /***************************** SMP support ************************************/
  207. #include <linux/spinlock.h>
  208. #define AIC79XX_DRIVER_VERSION "3.0"
  209. /*************************** Device Data Structures ***************************/
  210. /*
  211. * A per probed device structure used to deal with some error recovery
  212. * scenarios that the Linux mid-layer code just doesn't know how to
  213. * handle. The structure allocated for a device only becomes persistent
  214. * after a successfully completed inquiry command to the target when
  215. * that inquiry data indicates a lun is present.
  216. */
  217. typedef enum {
  218. AHD_DEV_FREEZE_TIL_EMPTY = 0x02, /* Freeze queue until active == 0 */
  219. AHD_DEV_Q_BASIC = 0x10, /* Allow basic device queuing */
  220. AHD_DEV_Q_TAGGED = 0x20, /* Allow full SCSI2 command queueing */
  221. AHD_DEV_PERIODIC_OTAG = 0x40, /* Send OTAG to prevent starvation */
  222. } ahd_linux_dev_flags;
  223. struct ahd_linux_device {
  224. TAILQ_ENTRY(ahd_linux_device) links;
  225. /*
  226. * The number of transactions currently
  227. * queued to the device.
  228. */
  229. int active;
  230. /*
  231. * The currently allowed number of
  232. * transactions that can be queued to
  233. * the device. Must be signed for
  234. * conversion from tagged to untagged
  235. * mode where the device may have more
  236. * than one outstanding active transaction.
  237. */
  238. int openings;
  239. /*
  240. * A positive count indicates that this
  241. * device's queue is halted.
  242. */
  243. u_int qfrozen;
  244. /*
  245. * Cumulative command counter.
  246. */
  247. u_long commands_issued;
  248. /*
  249. * The number of tagged transactions when
  250. * running at our current opening level
  251. * that have been successfully received by
  252. * this device since the last QUEUE FULL.
  253. */
  254. u_int tag_success_count;
  255. #define AHD_TAG_SUCCESS_INTERVAL 50
  256. ahd_linux_dev_flags flags;
  257. /*
  258. * Per device timer.
  259. */
  260. struct timer_list timer;
  261. /*
  262. * The high limit for the tags variable.
  263. */
  264. u_int maxtags;
  265. /*
  266. * The computed number of tags outstanding
  267. * at the time of the last QUEUE FULL event.
  268. */
  269. u_int tags_on_last_queuefull;
  270. /*
  271. * How many times we have seen a queue full
  272. * with the same number of tags. This is used
  273. * to stop our adaptive queue depth algorithm
  274. * on devices with a fixed number of tags.
  275. */
  276. u_int last_queuefull_same_count;
  277. #define AHD_LOCK_TAGS_COUNT 50
  278. /*
  279. * How many transactions have been queued
  280. * without the device going idle. We use
  281. * this statistic to determine when to issue
  282. * an ordered tag to prevent transaction
  283. * starvation. This statistic is only updated
  284. * if the AHD_DEV_PERIODIC_OTAG flag is set
  285. * on this device.
  286. */
  287. u_int commands_since_idle_or_otag;
  288. #define AHD_OTAG_THRESH 500
  289. };
  290. /********************* Definitions Required by the Core ***********************/
  291. /*
  292. * Number of SG segments we require. So long as the S/G segments for
  293. * a particular transaction are allocated in a physically contiguous
  294. * manner and are allocated below 4GB, the number of S/G segments is
  295. * unrestricted.
  296. */
  297. #define AHD_NSEG 128
  298. /*
  299. * Per-SCB OSM storage.
  300. */
  301. struct scb_platform_data {
  302. struct ahd_linux_device *dev;
  303. dma_addr_t buf_busaddr;
  304. uint32_t xfer_len;
  305. uint32_t sense_resid; /* Auto-Sense residual */
  306. };
  307. /*
  308. * Define a structure used for each host adapter. All members are
  309. * aligned on a boundary >= the size of the member to honor the
  310. * alignment restrictions of the various platforms supported by
  311. * this driver.
  312. */
  313. struct ahd_platform_data {
  314. /*
  315. * Fields accessed from interrupt context.
  316. */
  317. struct scsi_target *starget[AHD_NUM_TARGETS];
  318. spinlock_t spin_lock;
  319. struct completion *eh_done;
  320. struct Scsi_Host *host; /* pointer to scsi host */
  321. #define AHD_LINUX_NOIRQ ((uint32_t)~0)
  322. uint32_t irq; /* IRQ for this adapter */
  323. uint32_t bios_address;
  324. uint32_t mem_busaddr; /* Mem Base Addr */
  325. };
  326. /************************** OS Utility Wrappers *******************************/
  327. #define printf printk
  328. #define M_NOWAIT GFP_ATOMIC
  329. #define M_WAITOK 0
  330. #define malloc(size, type, flags) kmalloc(size, flags)
  331. #define free(ptr, type) kfree(ptr)
  332. static __inline void ahd_delay(long);
  333. static __inline void
  334. ahd_delay(long usec)
  335. {
  336. /*
  337. * udelay on Linux can have problems for
  338. * multi-millisecond waits. Wait at most
  339. * 1024us per call.
  340. */
  341. while (usec > 0) {
  342. udelay(usec % 1024);
  343. usec -= 1024;
  344. }
  345. }
  346. /***************************** Low Level I/O **********************************/
  347. static __inline uint8_t ahd_inb(struct ahd_softc * ahd, long port);
  348. static __inline uint16_t ahd_inw_atomic(struct ahd_softc * ahd, long port);
  349. static __inline void ahd_outb(struct ahd_softc * ahd, long port, uint8_t val);
  350. static __inline void ahd_outw_atomic(struct ahd_softc * ahd,
  351. long port, uint16_t val);
  352. static __inline void ahd_outsb(struct ahd_softc * ahd, long port,
  353. uint8_t *, int count);
  354. static __inline void ahd_insb(struct ahd_softc * ahd, long port,
  355. uint8_t *, int count);
  356. static __inline uint8_t
  357. ahd_inb(struct ahd_softc * ahd, long port)
  358. {
  359. uint8_t x;
  360. if (ahd->tags[0] == BUS_SPACE_MEMIO) {
  361. x = readb(ahd->bshs[0].maddr + port);
  362. } else {
  363. x = inb(ahd->bshs[(port) >> 8].ioport + ((port) & 0xFF));
  364. }
  365. mb();
  366. return (x);
  367. }
  368. static __inline uint16_t
  369. ahd_inw_atomic(struct ahd_softc * ahd, long port)
  370. {
  371. uint8_t x;
  372. if (ahd->tags[0] == BUS_SPACE_MEMIO) {
  373. x = readw(ahd->bshs[0].maddr + port);
  374. } else {
  375. x = inw(ahd->bshs[(port) >> 8].ioport + ((port) & 0xFF));
  376. }
  377. mb();
  378. return (x);
  379. }
  380. static __inline void
  381. ahd_outb(struct ahd_softc * ahd, long port, uint8_t val)
  382. {
  383. if (ahd->tags[0] == BUS_SPACE_MEMIO) {
  384. writeb(val, ahd->bshs[0].maddr + port);
  385. } else {
  386. outb(val, ahd->bshs[(port) >> 8].ioport + (port & 0xFF));
  387. }
  388. mb();
  389. }
  390. static __inline void
  391. ahd_outw_atomic(struct ahd_softc * ahd, long port, uint16_t val)
  392. {
  393. if (ahd->tags[0] == BUS_SPACE_MEMIO) {
  394. writew(val, ahd->bshs[0].maddr + port);
  395. } else {
  396. outw(val, ahd->bshs[(port) >> 8].ioport + (port & 0xFF));
  397. }
  398. mb();
  399. }
  400. static __inline void
  401. ahd_outsb(struct ahd_softc * ahd, long port, uint8_t *array, int count)
  402. {
  403. int i;
  404. /*
  405. * There is probably a more efficient way to do this on Linux
  406. * but we don't use this for anything speed critical and this
  407. * should work.
  408. */
  409. for (i = 0; i < count; i++)
  410. ahd_outb(ahd, port, *array++);
  411. }
  412. static __inline void
  413. ahd_insb(struct ahd_softc * ahd, long port, uint8_t *array, int count)
  414. {
  415. int i;
  416. /*
  417. * There is probably a more efficient way to do this on Linux
  418. * but we don't use this for anything speed critical and this
  419. * should work.
  420. */
  421. for (i = 0; i < count; i++)
  422. *array++ = ahd_inb(ahd, port);
  423. }
  424. /**************************** Initialization **********************************/
  425. int ahd_linux_register_host(struct ahd_softc *,
  426. struct scsi_host_template *);
  427. /*************************** Pretty Printing **********************************/
  428. struct info_str {
  429. char *buffer;
  430. int length;
  431. off_t offset;
  432. int pos;
  433. };
  434. /******************************** Locking *************************************/
  435. static __inline void
  436. ahd_lockinit(struct ahd_softc *ahd)
  437. {
  438. spin_lock_init(&ahd->platform_data->spin_lock);
  439. }
  440. static __inline void
  441. ahd_lock(struct ahd_softc *ahd, unsigned long *flags)
  442. {
  443. spin_lock_irqsave(&ahd->platform_data->spin_lock, *flags);
  444. }
  445. static __inline void
  446. ahd_unlock(struct ahd_softc *ahd, unsigned long *flags)
  447. {
  448. spin_unlock_irqrestore(&ahd->platform_data->spin_lock, *flags);
  449. }
  450. /******************************* PCI Definitions ******************************/
  451. /*
  452. * PCIM_xxx: mask to locate subfield in register
  453. * PCIR_xxx: config register offset
  454. * PCIC_xxx: device class
  455. * PCIS_xxx: device subclass
  456. * PCIP_xxx: device programming interface
  457. * PCIV_xxx: PCI vendor ID (only required to fixup ancient devices)
  458. * PCID_xxx: device ID
  459. */
  460. #define PCIR_DEVVENDOR 0x00
  461. #define PCIR_VENDOR 0x00
  462. #define PCIR_DEVICE 0x02
  463. #define PCIR_COMMAND 0x04
  464. #define PCIM_CMD_PORTEN 0x0001
  465. #define PCIM_CMD_MEMEN 0x0002
  466. #define PCIM_CMD_BUSMASTEREN 0x0004
  467. #define PCIM_CMD_MWRICEN 0x0010
  468. #define PCIM_CMD_PERRESPEN 0x0040
  469. #define PCIM_CMD_SERRESPEN 0x0100
  470. #define PCIR_STATUS 0x06
  471. #define PCIR_REVID 0x08
  472. #define PCIR_PROGIF 0x09
  473. #define PCIR_SUBCLASS 0x0a
  474. #define PCIR_CLASS 0x0b
  475. #define PCIR_CACHELNSZ 0x0c
  476. #define PCIR_LATTIMER 0x0d
  477. #define PCIR_HEADERTYPE 0x0e
  478. #define PCIM_MFDEV 0x80
  479. #define PCIR_BIST 0x0f
  480. #define PCIR_CAP_PTR 0x34
  481. /* config registers for header type 0 devices */
  482. #define PCIR_MAPS 0x10
  483. #define PCIR_SUBVEND_0 0x2c
  484. #define PCIR_SUBDEV_0 0x2e
  485. /****************************** PCI-X definitions *****************************/
  486. #define PCIXR_COMMAND 0x96
  487. #define PCIXR_DEVADDR 0x98
  488. #define PCIXM_DEVADDR_FNUM 0x0003 /* Function Number */
  489. #define PCIXM_DEVADDR_DNUM 0x00F8 /* Device Number */
  490. #define PCIXM_DEVADDR_BNUM 0xFF00 /* Bus Number */
  491. #define PCIXR_STATUS 0x9A
  492. #define PCIXM_STATUS_64BIT 0x0001 /* Active 64bit connection to device. */
  493. #define PCIXM_STATUS_133CAP 0x0002 /* Device is 133MHz capable */
  494. #define PCIXM_STATUS_SCDISC 0x0004 /* Split Completion Discarded */
  495. #define PCIXM_STATUS_UNEXPSC 0x0008 /* Unexpected Split Completion */
  496. #define PCIXM_STATUS_CMPLEXDEV 0x0010 /* Device Complexity (set == bridge) */
  497. #define PCIXM_STATUS_MAXMRDBC 0x0060 /* Maximum Burst Read Count */
  498. #define PCIXM_STATUS_MAXSPLITS 0x0380 /* Maximum Split Transactions */
  499. #define PCIXM_STATUS_MAXCRDS 0x1C00 /* Maximum Cumulative Read Size */
  500. #define PCIXM_STATUS_RCVDSCEM 0x2000 /* Received a Split Comp w/Error msg */
  501. typedef enum
  502. {
  503. AHD_POWER_STATE_D0,
  504. AHD_POWER_STATE_D1,
  505. AHD_POWER_STATE_D2,
  506. AHD_POWER_STATE_D3
  507. } ahd_power_state;
  508. void ahd_power_state_change(struct ahd_softc *ahd,
  509. ahd_power_state new_state);
  510. /******************************* PCI Routines *********************************/
  511. int ahd_linux_pci_init(void);
  512. void ahd_linux_pci_exit(void);
  513. int ahd_pci_map_registers(struct ahd_softc *ahd);
  514. int ahd_pci_map_int(struct ahd_softc *ahd);
  515. static __inline uint32_t ahd_pci_read_config(ahd_dev_softc_t pci,
  516. int reg, int width);
  517. static __inline uint32_t
  518. ahd_pci_read_config(ahd_dev_softc_t pci, int reg, int width)
  519. {
  520. switch (width) {
  521. case 1:
  522. {
  523. uint8_t retval;
  524. pci_read_config_byte(pci, reg, &retval);
  525. return (retval);
  526. }
  527. case 2:
  528. {
  529. uint16_t retval;
  530. pci_read_config_word(pci, reg, &retval);
  531. return (retval);
  532. }
  533. case 4:
  534. {
  535. uint32_t retval;
  536. pci_read_config_dword(pci, reg, &retval);
  537. return (retval);
  538. }
  539. default:
  540. panic("ahd_pci_read_config: Read size too big");
  541. /* NOTREACHED */
  542. return (0);
  543. }
  544. }
  545. static __inline void ahd_pci_write_config(ahd_dev_softc_t pci,
  546. int reg, uint32_t value,
  547. int width);
  548. static __inline void
  549. ahd_pci_write_config(ahd_dev_softc_t pci, int reg, uint32_t value, int width)
  550. {
  551. switch (width) {
  552. case 1:
  553. pci_write_config_byte(pci, reg, value);
  554. break;
  555. case 2:
  556. pci_write_config_word(pci, reg, value);
  557. break;
  558. case 4:
  559. pci_write_config_dword(pci, reg, value);
  560. break;
  561. default:
  562. panic("ahd_pci_write_config: Write size too big");
  563. /* NOTREACHED */
  564. }
  565. }
  566. static __inline int ahd_get_pci_function(ahd_dev_softc_t);
  567. static __inline int
  568. ahd_get_pci_function(ahd_dev_softc_t pci)
  569. {
  570. return (PCI_FUNC(pci->devfn));
  571. }
  572. static __inline int ahd_get_pci_slot(ahd_dev_softc_t);
  573. static __inline int
  574. ahd_get_pci_slot(ahd_dev_softc_t pci)
  575. {
  576. return (PCI_SLOT(pci->devfn));
  577. }
  578. static __inline int ahd_get_pci_bus(ahd_dev_softc_t);
  579. static __inline int
  580. ahd_get_pci_bus(ahd_dev_softc_t pci)
  581. {
  582. return (pci->bus->number);
  583. }
  584. static __inline void ahd_flush_device_writes(struct ahd_softc *);
  585. static __inline void
  586. ahd_flush_device_writes(struct ahd_softc *ahd)
  587. {
  588. /* XXX Is this sufficient for all architectures??? */
  589. ahd_inb(ahd, INTSTAT);
  590. }
  591. /**************************** Proc FS Support *********************************/
  592. int ahd_linux_proc_info(struct Scsi_Host *, char *, char **,
  593. off_t, int, int);
  594. /*********************** Transaction Access Wrappers **************************/
  595. static __inline void ahd_cmd_set_transaction_status(struct scsi_cmnd *, uint32_t);
  596. static __inline void ahd_set_transaction_status(struct scb *, uint32_t);
  597. static __inline void ahd_cmd_set_scsi_status(struct scsi_cmnd *, uint32_t);
  598. static __inline void ahd_set_scsi_status(struct scb *, uint32_t);
  599. static __inline uint32_t ahd_cmd_get_transaction_status(struct scsi_cmnd *cmd);
  600. static __inline uint32_t ahd_get_transaction_status(struct scb *);
  601. static __inline uint32_t ahd_cmd_get_scsi_status(struct scsi_cmnd *cmd);
  602. static __inline uint32_t ahd_get_scsi_status(struct scb *);
  603. static __inline void ahd_set_transaction_tag(struct scb *, int, u_int);
  604. static __inline u_long ahd_get_transfer_length(struct scb *);
  605. static __inline int ahd_get_transfer_dir(struct scb *);
  606. static __inline void ahd_set_residual(struct scb *, u_long);
  607. static __inline void ahd_set_sense_residual(struct scb *scb, u_long resid);
  608. static __inline u_long ahd_get_residual(struct scb *);
  609. static __inline u_long ahd_get_sense_residual(struct scb *);
  610. static __inline int ahd_perform_autosense(struct scb *);
  611. static __inline uint32_t ahd_get_sense_bufsize(struct ahd_softc *,
  612. struct scb *);
  613. static __inline void ahd_notify_xfer_settings_change(struct ahd_softc *,
  614. struct ahd_devinfo *);
  615. static __inline void ahd_platform_scb_free(struct ahd_softc *ahd,
  616. struct scb *scb);
  617. static __inline void ahd_freeze_scb(struct scb *scb);
  618. static __inline
  619. void ahd_cmd_set_transaction_status(struct scsi_cmnd *cmd, uint32_t status)
  620. {
  621. cmd->result &= ~(CAM_STATUS_MASK << 16);
  622. cmd->result |= status << 16;
  623. }
  624. static __inline
  625. void ahd_set_transaction_status(struct scb *scb, uint32_t status)
  626. {
  627. ahd_cmd_set_transaction_status(scb->io_ctx,status);
  628. }
  629. static __inline
  630. void ahd_cmd_set_scsi_status(struct scsi_cmnd *cmd, uint32_t status)
  631. {
  632. cmd->result &= ~0xFFFF;
  633. cmd->result |= status;
  634. }
  635. static __inline
  636. void ahd_set_scsi_status(struct scb *scb, uint32_t status)
  637. {
  638. ahd_cmd_set_scsi_status(scb->io_ctx, status);
  639. }
  640. static __inline
  641. uint32_t ahd_cmd_get_transaction_status(struct scsi_cmnd *cmd)
  642. {
  643. return ((cmd->result >> 16) & CAM_STATUS_MASK);
  644. }
  645. static __inline
  646. uint32_t ahd_get_transaction_status(struct scb *scb)
  647. {
  648. return (ahd_cmd_get_transaction_status(scb->io_ctx));
  649. }
  650. static __inline
  651. uint32_t ahd_cmd_get_scsi_status(struct scsi_cmnd *cmd)
  652. {
  653. return (cmd->result & 0xFFFF);
  654. }
  655. static __inline
  656. uint32_t ahd_get_scsi_status(struct scb *scb)
  657. {
  658. return (ahd_cmd_get_scsi_status(scb->io_ctx));
  659. }
  660. static __inline
  661. void ahd_set_transaction_tag(struct scb *scb, int enabled, u_int type)
  662. {
  663. /*
  664. * Nothing to do for linux as the incoming transaction
  665. * has no concept of tag/non tagged, etc.
  666. */
  667. }
  668. static __inline
  669. u_long ahd_get_transfer_length(struct scb *scb)
  670. {
  671. return (scb->platform_data->xfer_len);
  672. }
  673. static __inline
  674. int ahd_get_transfer_dir(struct scb *scb)
  675. {
  676. return (scb->io_ctx->sc_data_direction);
  677. }
  678. static __inline
  679. void ahd_set_residual(struct scb *scb, u_long resid)
  680. {
  681. scb->io_ctx->resid = resid;
  682. }
  683. static __inline
  684. void ahd_set_sense_residual(struct scb *scb, u_long resid)
  685. {
  686. scb->platform_data->sense_resid = resid;
  687. }
  688. static __inline
  689. u_long ahd_get_residual(struct scb *scb)
  690. {
  691. return (scb->io_ctx->resid);
  692. }
  693. static __inline
  694. u_long ahd_get_sense_residual(struct scb *scb)
  695. {
  696. return (scb->platform_data->sense_resid);
  697. }
  698. static __inline
  699. int ahd_perform_autosense(struct scb *scb)
  700. {
  701. /*
  702. * We always perform autosense in Linux.
  703. * On other platforms this is set on a
  704. * per-transaction basis.
  705. */
  706. return (1);
  707. }
  708. static __inline uint32_t
  709. ahd_get_sense_bufsize(struct ahd_softc *ahd, struct scb *scb)
  710. {
  711. return (sizeof(struct scsi_sense_data));
  712. }
  713. static __inline void
  714. ahd_notify_xfer_settings_change(struct ahd_softc *ahd,
  715. struct ahd_devinfo *devinfo)
  716. {
  717. /* Nothing to do here for linux */
  718. }
  719. static __inline void
  720. ahd_platform_scb_free(struct ahd_softc *ahd, struct scb *scb)
  721. {
  722. ahd->flags &= ~AHD_RESOURCE_SHORTAGE;
  723. }
  724. int ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg);
  725. void ahd_platform_free(struct ahd_softc *ahd);
  726. void ahd_platform_init(struct ahd_softc *ahd);
  727. void ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb);
  728. static __inline void
  729. ahd_freeze_scb(struct scb *scb)
  730. {
  731. if ((scb->io_ctx->result & (CAM_DEV_QFRZN << 16)) == 0) {
  732. scb->io_ctx->result |= CAM_DEV_QFRZN << 16;
  733. scb->platform_data->dev->qfrozen++;
  734. }
  735. }
  736. void ahd_platform_set_tags(struct ahd_softc *ahd, struct scsi_device *sdev,
  737. struct ahd_devinfo *devinfo, ahd_queue_alg);
  738. int ahd_platform_abort_scbs(struct ahd_softc *ahd, int target,
  739. char channel, int lun, u_int tag,
  740. role_t role, uint32_t status);
  741. irqreturn_t
  742. ahd_linux_isr(int irq, void *dev_id);
  743. void ahd_done(struct ahd_softc*, struct scb*);
  744. void ahd_send_async(struct ahd_softc *, char channel,
  745. u_int target, u_int lun, ac_code);
  746. void ahd_print_path(struct ahd_softc *, struct scb *);
  747. #ifdef CONFIG_PCI
  748. #define AHD_PCI_CONFIG 1
  749. #else
  750. #define AHD_PCI_CONFIG 0
  751. #endif
  752. #define bootverbose aic79xx_verbose
  753. extern uint32_t aic79xx_verbose;
  754. #endif /* _AIC79XX_LINUX_H_ */