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-rw-r--r--include/linux/ata.h96
1 files changed, 85 insertions, 11 deletions
diff --git a/include/linux/ata.h b/include/linux/ata.h
index fba8e1459832..a749f006387f 100644
--- a/include/linux/ata.h
+++ b/include/linux/ata.h
@@ -347,22 +347,12 @@ struct ata_taskfile {
347}; 347};
348 348
349#define ata_id_is_ata(id) (((id)[0] & (1 << 15)) == 0) 349#define ata_id_is_ata(id) (((id)[0] & (1 << 15)) == 0)
350#define ata_id_rahead_enabled(id) ((id)[85] & (1 << 6))
351#define ata_id_wcache_enabled(id) ((id)[85] & (1 << 5))
352#define ata_id_hpa_enabled(id) ((id)[85] & (1 << 10))
353#define ata_id_has_fua(id) ((id)[84] & (1 << 6))
354#define ata_id_has_flush(id) ((id)[83] & (1 << 12))
355#define ata_id_has_flush_ext(id) ((id)[83] & (1 << 13))
356#define ata_id_has_lba48(id) ((id)[83] & (1 << 10))
357#define ata_id_has_hpa(id) ((id)[82] & (1 << 10))
358#define ata_id_has_wcache(id) ((id)[82] & (1 << 5))
359#define ata_id_has_pm(id) ((id)[82] & (1 << 3))
360#define ata_id_has_lba(id) ((id)[49] & (1 << 9)) 350#define ata_id_has_lba(id) ((id)[49] & (1 << 9))
361#define ata_id_has_dma(id) ((id)[49] & (1 << 8)) 351#define ata_id_has_dma(id) ((id)[49] & (1 << 8))
362#define ata_id_has_ncq(id) ((id)[76] & (1 << 8)) 352#define ata_id_has_ncq(id) ((id)[76] & (1 << 8))
363#define ata_id_queue_depth(id) (((id)[75] & 0x1f) + 1) 353#define ata_id_queue_depth(id) (((id)[75] & 0x1f) + 1)
364#define ata_id_removeable(id) ((id)[0] & (1 << 7)) 354#define ata_id_removeable(id) ((id)[0] & (1 << 7))
365#define ata_id_has_dword_io(id) ((id)[50] & (1 << 0)) 355#define ata_id_has_dword_io(id) ((id)[48] & (1 << 0))
366#define ata_id_has_AN(id) \ 356#define ata_id_has_AN(id) \
367 ( (((id)[76] != 0x0000) && ((id)[76] != 0xffff)) && \ 357 ( (((id)[76] != 0x0000) && ((id)[76] != 0xffff)) && \
368 ((id)[78] & (1 << 5)) ) 358 ((id)[78] & (1 << 5)) )
@@ -378,6 +368,90 @@ struct ata_taskfile {
378 368
379#define ata_id_cdb_intr(id) (((id)[0] & 0x60) == 0x20) 369#define ata_id_cdb_intr(id) (((id)[0] & 0x60) == 0x20)
380 370
371static inline int ata_id_has_fua(const u16 *id)
372{
373 if ((id[84] & 0xC000) != 0x4000)
374 return 0;
375 return id[84] & (1 << 6);
376}
377
378static inline int ata_id_has_flush(const u16 *id)
379{
380 if ((id[83] & 0xC000) != 0x4000)
381 return 0;
382 return id[83] & (1 << 12);
383}
384
385static inline int ata_id_has_flush_ext(const u16 *id)
386{
387 if ((id[83] & 0xC000) != 0x4000)
388 return 0;
389 return id[83] & (1 << 13);
390}
391
392static inline int ata_id_has_lba48(const u16 *id)
393{
394 if ((id[83] & 0xC000) != 0x4000)
395 return 0;
396 return id[83] & (1 << 10);
397}
398
399static inline int ata_id_hpa_enabled(const u16 *id)
400{
401 /* Yes children, word 83 valid bits cover word 82 data */
402 if ((id[83] & 0xC000) != 0x4000)
403 return 0;
404 /* And 87 covers 85-87 */
405 if ((id[87] & 0xC000) != 0x4000)
406 return 0;
407 /* Check command sets enabled as well as supported */
408 if ((id[85] & ( 1 << 10)) == 0)
409 return 0;
410 return id[82] & (1 << 10);
411}
412
413static inline int ata_id_has_wcache(const u16 *id)
414{
415 /* Yes children, word 83 valid bits cover word 82 data */
416 if ((id[83] & 0xC000) != 0x4000)
417 return 0;
418 return id[82] & (1 << 5);
419}
420
421static inline int ata_id_has_pm(const u16 *id)
422{
423 if ((id[83] & 0xC000) != 0x4000)
424 return 0;
425 return id[82] & (1 << 3);
426}
427
428static inline int ata_id_rahead_enabled(const u16 *id)
429{
430 if ((id[87] & 0xC000) != 0x4000)
431 return 0;
432 return id[85] & (1 << 6);
433}
434
435static inline int ata_id_wcache_enabled(const u16 *id)
436{
437 if ((id[87] & 0xC000) != 0x4000)
438 return 0;
439 return id[85] & (1 << 5);
440}
441
442/**
443 * ata_id_major_version - get ATA level of drive
444 * @id: Identify data
445 *
446 * Caveats:
447 * ATA-1 considers identify optional
448 * ATA-2 introduces mandatory identify
449 * ATA-3 introduces word 80 and accurate reporting
450 *
451 * The practical impact of this is that ata_id_major_version cannot
452 * reliably report on drives below ATA3.
453 */
454
381static inline unsigned int ata_id_major_version(const u16 *id) 455static inline unsigned int ata_id_major_version(const u16 *id)
382{ 456{
383 unsigned int mver; 457 unsigned int mver;