1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /******************************************************************************
3 ** Device driver for the PCI-SCSI NCR538XX controller family.
5 ** Copyright (C) 1994 Wolfgang Stanglmeier
8 **-----------------------------------------------------------------------------
10 ** This driver has been ported to Linux from the FreeBSD NCR53C8XX driver
11 ** and is currently maintained by
13 ** Gerard Roudier <groudier@free.fr>
15 ** Being given that this driver originates from the FreeBSD version, and
16 ** in order to keep synergy on both, any suggested enhancements and corrections
17 ** received on Linux are automatically a potential candidate for the FreeBSD
20 ** The original driver has been written for 386bsd and FreeBSD by
21 ** Wolfgang Stanglmeier <wolf@cologne.de>
22 ** Stefan Esser <se@mi.Uni-Koeln.de>
24 ** And has been ported to NetBSD by
25 ** Charles M. Hannum <mycroft@gnu.ai.mit.edu>
27 **-----------------------------------------------------------------------------
31 ** December 10 1995 by Gerard Roudier:
32 ** Initial port to Linux.
34 ** June 23 1996 by Gerard Roudier:
35 ** Support for 64 bits architectures (Alpha).
37 ** November 30 1996 by Gerard Roudier:
38 ** Support for Fast-20 scsi.
39 ** Support for large DMA fifo and 128 dwords bursting.
41 ** February 27 1997 by Gerard Roudier:
42 ** Support for Fast-40 scsi.
43 ** Support for on-Board RAM.
45 ** May 3 1997 by Gerard Roudier:
46 ** Full support for scsi scripts instructions pre-fetching.
48 ** May 19 1997 by Richard Waltham <dormouse@farsrobt.demon.co.uk>:
49 ** Support for NvRAM detection and reading.
51 ** August 18 1997 by Cort <cort@cs.nmt.edu>:
52 ** Support for Power/PC (Big Endian).
54 ** June 20 1998 by Gerard Roudier
55 ** Support for up to 64 tags per lun.
56 ** O(1) everywhere (C and SCRIPTS) for normal cases.
57 ** Low PCI traffic for command handling when on-chip RAM is present.
58 ** Aggressive SCSI SCRIPTS optimizations.
60 ** 2005 by Matthew Wilcox and James Bottomley
61 ** PCI-ectomy. This driver now supports only the 720 chip (see the
62 ** NCR_Q720 and zalon drivers for the bus probe logic).
64 *******************************************************************************
68 ** Supported SCSI-II features:
69 ** Synchronous negotiation
70 ** Wide negotiation (depends on the NCR Chip)
71 ** Enable disconnection
72 ** Tagged command queuing
76 ** Supported NCR/SYMBIOS chips:
77 ** 53C720 (Wide, Fast SCSI-2, intfly problems)
80 /* Name and version of the driver */
81 #define SCSI_NCR_DRIVER_NAME "ncr53c8xx-3.4.3g"
83 #define SCSI_NCR_DEBUG_FLAGS (0)
85 #include <linux/blkdev.h>
86 #include <linux/delay.h>
87 #include <linux/dma-mapping.h>
88 #include <linux/errno.h>
89 #include <linux/gfp.h>
90 #include <linux/init.h>
91 #include <linux/interrupt.h>
92 #include <linux/ioport.h>
94 #include <linux/module.h>
95 #include <linux/sched.h>
96 #include <linux/signal.h>
97 #include <linux/spinlock.h>
98 #include <linux/stat.h>
99 #include <linux/string.h>
100 #include <linux/time.h>
101 #include <linux/timer.h>
102 #include <linux/types.h>
107 #include <scsi/scsi.h>
108 #include <scsi/scsi_cmnd.h>
109 #include <scsi/scsi_dbg.h>
110 #include <scsi/scsi_device.h>
111 #include <scsi/scsi_tcq.h>
112 #include <scsi/scsi_transport.h>
113 #include <scsi/scsi_transport_spi.h>
115 #include "ncr53c8xx.h"
117 #define NAME53C8XX "ncr53c8xx"
119 /*==========================================================
123 **==========================================================
126 #define DEBUG_ALLOC (0x0001)
127 #define DEBUG_PHASE (0x0002)
128 #define DEBUG_QUEUE (0x0008)
129 #define DEBUG_RESULT (0x0010)
130 #define DEBUG_POINTER (0x0020)
131 #define DEBUG_SCRIPT (0x0040)
132 #define DEBUG_TINY (0x0080)
133 #define DEBUG_TIMING (0x0100)
134 #define DEBUG_NEGO (0x0200)
135 #define DEBUG_TAGS (0x0400)
136 #define DEBUG_SCATTER (0x0800)
137 #define DEBUG_IC (0x1000)
140 ** Enable/Disable debug messages.
141 ** Can be changed at runtime too.
144 #ifdef SCSI_NCR_DEBUG_INFO_SUPPORT
145 static int ncr_debug
= SCSI_NCR_DEBUG_FLAGS
;
146 #define DEBUG_FLAGS ncr_debug
148 #define DEBUG_FLAGS SCSI_NCR_DEBUG_FLAGS
152 * Locally used status flag
154 #define SAM_STAT_ILLEGAL 0xff
156 static inline struct list_head
*ncr_list_pop(struct list_head
*head
)
158 if (!list_empty(head
)) {
159 struct list_head
*elem
= head
->next
;
168 /*==========================================================
170 ** Simple power of two buddy-like allocator.
172 ** This simple code is not intended to be fast, but to
173 ** provide power of 2 aligned memory allocations.
174 ** Since the SCRIPTS processor only supplies 8 bit
175 ** arithmetic, this allocator allows simple and fast
176 ** address calculations from the SCRIPTS code.
177 ** In addition, cache line alignment is guaranteed for
178 ** power of 2 cache line size.
179 ** Enhanced in linux-2.3.44 to provide a memory pool
180 ** per pcidev to support dynamic dma mapping. (I would
181 ** have preferred a real bus abstraction, btw).
183 **==========================================================
186 #define MEMO_SHIFT 4 /* 16 bytes minimum memory chunk */
187 #if PAGE_SIZE >= 8192
188 #define MEMO_PAGE_ORDER 0 /* 1 PAGE maximum */
190 #define MEMO_PAGE_ORDER 1 /* 2 PAGES maximum */
192 #define MEMO_FREE_UNUSED /* Free unused pages immediately */
194 #define MEMO_GFP_FLAGS GFP_ATOMIC
195 #define MEMO_CLUSTER_SHIFT (PAGE_SHIFT+MEMO_PAGE_ORDER)
196 #define MEMO_CLUSTER_SIZE (1UL << MEMO_CLUSTER_SHIFT)
197 #define MEMO_CLUSTER_MASK (MEMO_CLUSTER_SIZE-1)
199 typedef u_long m_addr_t
; /* Enough bits to bit-hack addresses */
200 typedef struct device
*m_bush_t
; /* Something that addresses DMAable */
202 typedef struct m_link
{ /* Link between free memory chunks */
206 typedef struct m_vtob
{ /* Virtual to Bus address translation */
211 #define VTOB_HASH_SHIFT 5
212 #define VTOB_HASH_SIZE (1UL << VTOB_HASH_SHIFT)
213 #define VTOB_HASH_MASK (VTOB_HASH_SIZE-1)
214 #define VTOB_HASH_CODE(m) \
215 ((((m_addr_t) (m)) >> MEMO_CLUSTER_SHIFT) & VTOB_HASH_MASK)
217 typedef struct m_pool
{ /* Memory pool of a given kind */
219 m_addr_t (*getp
)(struct m_pool
*);
220 void (*freep
)(struct m_pool
*, m_addr_t
);
222 m_vtob_s
*(vtob
[VTOB_HASH_SIZE
]);
224 struct m_link h
[PAGE_SHIFT
-MEMO_SHIFT
+MEMO_PAGE_ORDER
+1];
227 static void *___m_alloc(m_pool_s
*mp
, int size
)
230 int s
= (1 << MEMO_SHIFT
);
235 if (size
> (PAGE_SIZE
<< MEMO_PAGE_ORDER
))
245 if (s
== (PAGE_SIZE
<< MEMO_PAGE_ORDER
)) {
246 h
[j
].next
= (m_link_s
*)mp
->getp(mp
);
248 h
[j
].next
->next
= NULL
;
254 a
= (m_addr_t
) h
[j
].next
;
256 h
[j
].next
= h
[j
].next
->next
;
260 h
[j
].next
= (m_link_s
*) (a
+s
);
261 h
[j
].next
->next
= NULL
;
265 printk("___m_alloc(%d) = %p\n", size
, (void *) a
);
270 static void ___m_free(m_pool_s
*mp
, void *ptr
, int size
)
273 int s
= (1 << MEMO_SHIFT
);
279 printk("___m_free(%p, %d)\n", ptr
, size
);
282 if (size
> (PAGE_SIZE
<< MEMO_PAGE_ORDER
))
293 #ifdef MEMO_FREE_UNUSED
294 if (s
== (PAGE_SIZE
<< MEMO_PAGE_ORDER
)) {
301 while (q
->next
&& q
->next
!= (m_link_s
*) b
) {
305 ((m_link_s
*) a
)->next
= h
[i
].next
;
306 h
[i
].next
= (m_link_s
*) a
;
309 q
->next
= q
->next
->next
;
316 static DEFINE_SPINLOCK(ncr53c8xx_lock
);
318 static void *__m_calloc2(m_pool_s
*mp
, int size
, char *name
, int uflags
)
322 p
= ___m_alloc(mp
, size
);
324 if (DEBUG_FLAGS
& DEBUG_ALLOC
)
325 printk ("new %-10s[%4d] @%p.\n", name
, size
, p
);
329 else if (uflags
& MEMO_WARN
)
330 printk (NAME53C8XX
": failed to allocate %s[%d]\n", name
, size
);
335 #define __m_calloc(mp, s, n) __m_calloc2(mp, s, n, MEMO_WARN)
337 static void __m_free(m_pool_s
*mp
, void *ptr
, int size
, char *name
)
339 if (DEBUG_FLAGS
& DEBUG_ALLOC
)
340 printk ("freeing %-10s[%4d] @%p.\n", name
, size
, ptr
);
342 ___m_free(mp
, ptr
, size
);
347 * With pci bus iommu support, we use a default pool of unmapped memory
348 * for memory we donnot need to DMA from/to and one pool per pcidev for
349 * memory accessed by the PCI chip. `mp0' is the default not DMAable pool.
352 static m_addr_t
___mp0_getp(m_pool_s
*mp
)
354 m_addr_t m
= __get_free_pages(MEMO_GFP_FLAGS
, MEMO_PAGE_ORDER
);
360 static void ___mp0_freep(m_pool_s
*mp
, m_addr_t m
)
362 free_pages(m
, MEMO_PAGE_ORDER
);
366 static m_pool_s mp0
= {NULL
, ___mp0_getp
, ___mp0_freep
};
373 * With pci bus iommu support, we maintain one pool per pcidev and a
374 * hashed reverse table for virtual to bus physical address translations.
376 static m_addr_t
___dma_getp(m_pool_s
*mp
)
381 vbp
= __m_calloc(&mp0
, sizeof(*vbp
), "VTOB");
384 vp
= (m_addr_t
) dma_alloc_coherent(mp
->bush
,
385 PAGE_SIZE
<<MEMO_PAGE_ORDER
,
388 int hc
= VTOB_HASH_CODE(vp
);
391 vbp
->next
= mp
->vtob
[hc
];
398 __m_free(&mp0
, vbp
, sizeof(*vbp
), "VTOB");
402 static void ___dma_freep(m_pool_s
*mp
, m_addr_t m
)
404 m_vtob_s
**vbpp
, *vbp
;
405 int hc
= VTOB_HASH_CODE(m
);
407 vbpp
= &mp
->vtob
[hc
];
408 while (*vbpp
&& (*vbpp
)->vaddr
!= m
)
409 vbpp
= &(*vbpp
)->next
;
412 *vbpp
= (*vbpp
)->next
;
413 dma_free_coherent(mp
->bush
, PAGE_SIZE
<<MEMO_PAGE_ORDER
,
414 (void *)vbp
->vaddr
, (dma_addr_t
)vbp
->baddr
);
415 __m_free(&mp0
, vbp
, sizeof(*vbp
), "VTOB");
420 static inline m_pool_s
*___get_dma_pool(m_bush_t bush
)
423 for (mp
= mp0
.next
; mp
&& mp
->bush
!= bush
; mp
= mp
->next
);
427 static m_pool_s
*___cre_dma_pool(m_bush_t bush
)
430 mp
= __m_calloc(&mp0
, sizeof(*mp
), "MPOOL");
432 memset(mp
, 0, sizeof(*mp
));
434 mp
->getp
= ___dma_getp
;
435 mp
->freep
= ___dma_freep
;
442 static void ___del_dma_pool(m_pool_s
*p
)
444 struct m_pool
**pp
= &mp0
.next
;
446 while (*pp
&& *pp
!= p
)
450 __m_free(&mp0
, p
, sizeof(*p
), "MPOOL");
454 static void *__m_calloc_dma(m_bush_t bush
, int size
, char *name
)
460 spin_lock_irqsave(&ncr53c8xx_lock
, flags
);
461 mp
= ___get_dma_pool(bush
);
463 mp
= ___cre_dma_pool(bush
);
465 m
= __m_calloc(mp
, size
, name
);
468 spin_unlock_irqrestore(&ncr53c8xx_lock
, flags
);
473 static void __m_free_dma(m_bush_t bush
, void *m
, int size
, char *name
)
478 spin_lock_irqsave(&ncr53c8xx_lock
, flags
);
479 mp
= ___get_dma_pool(bush
);
481 __m_free(mp
, m
, size
, name
);
484 spin_unlock_irqrestore(&ncr53c8xx_lock
, flags
);
487 static m_addr_t
__vtobus(m_bush_t bush
, void *m
)
491 int hc
= VTOB_HASH_CODE(m
);
493 m_addr_t a
= ((m_addr_t
) m
) & ~MEMO_CLUSTER_MASK
;
495 spin_lock_irqsave(&ncr53c8xx_lock
, flags
);
496 mp
= ___get_dma_pool(bush
);
499 while (vp
&& (m_addr_t
) vp
->vaddr
!= a
)
502 spin_unlock_irqrestore(&ncr53c8xx_lock
, flags
);
503 return vp
? vp
->baddr
+ (((m_addr_t
) m
) - a
) : 0;
506 #define _m_calloc_dma(np, s, n) __m_calloc_dma(np->dev, s, n)
507 #define _m_free_dma(np, p, s, n) __m_free_dma(np->dev, p, s, n)
508 #define m_calloc_dma(s, n) _m_calloc_dma(np, s, n)
509 #define m_free_dma(p, s, n) _m_free_dma(np, p, s, n)
510 #define _vtobus(np, p) __vtobus(np->dev, p)
511 #define vtobus(p) _vtobus(np, p)
514 * Deal with DMA mapping/unmapping.
517 /* To keep track of the dma mapping (sg/single) that has been set */
518 #define __data_mapped SCp.phase
519 #define __data_mapping SCp.have_data_in
521 static void __unmap_scsi_data(struct device
*dev
, struct scsi_cmnd
*cmd
)
523 switch(cmd
->__data_mapped
) {
528 cmd
->__data_mapped
= 0;
531 static int __map_scsi_sg_data(struct device
*dev
, struct scsi_cmnd
*cmd
)
535 use_sg
= scsi_dma_map(cmd
);
539 cmd
->__data_mapped
= 2;
540 cmd
->__data_mapping
= use_sg
;
545 #define unmap_scsi_data(np, cmd) __unmap_scsi_data(np->dev, cmd)
546 #define map_scsi_sg_data(np, cmd) __map_scsi_sg_data(np->dev, cmd)
548 /*==========================================================
552 ** This structure is initialized from linux config
553 ** options. It can be overridden at boot-up by the boot
556 **==========================================================
558 static struct ncr_driver_setup
559 driver_setup
= SCSI_NCR_DRIVER_SETUP
;
562 #ifdef SCSI_NCR_BOOT_COMMAND_LINE_SUPPORT
563 static struct ncr_driver_setup
564 driver_safe_setup __initdata
= SCSI_NCR_DRIVER_SAFE_SETUP
;
568 #define initverbose (driver_setup.verbose)
569 #define bootverbose (np->verbose)
572 /*===================================================================
574 ** Driver setup from the boot command line
576 **===================================================================
586 #define OPT_MASTER_PARITY 2
587 #define OPT_SCSI_PARITY 3
588 #define OPT_DISCONNECTION 4
589 #define OPT_SPECIAL_FEATURES 5
590 #define OPT_UNUSED_1 6
591 #define OPT_FORCE_SYNC_NEGO 7
592 #define OPT_REVERSE_PROBE 8
593 #define OPT_DEFAULT_SYNC 9
594 #define OPT_VERBOSE 10
596 #define OPT_BURST_MAX 12
597 #define OPT_LED_PIN 13
598 #define OPT_MAX_WIDE 14
599 #define OPT_SETTLE_DELAY 15
600 #define OPT_DIFF_SUPPORT 16
602 #define OPT_PCI_FIX_UP 18
603 #define OPT_BUS_CHECK 19
604 #define OPT_OPTIMIZE 20
605 #define OPT_RECOVERY 21
606 #define OPT_SAFE_SETUP 22
607 #define OPT_USE_NVRAM 23
608 #define OPT_EXCLUDE 24
609 #define OPT_HOST_ID 25
611 #ifdef SCSI_NCR_IARB_SUPPORT
622 static char setup_token
[] __initdata
=
636 #ifdef SCSI_NCR_IARB_SUPPORT
639 ; /* DONNOT REMOVE THIS ';' */
641 static int __init
get_setup_token(char *p
)
643 char *cur
= setup_token
;
647 while (cur
!= NULL
&& (pc
= strchr(cur
, ':')) != NULL
) {
650 if (!strncmp(p
, cur
, pc
- cur
))
657 static int __init
sym53c8xx__setup(char *str
)
659 #ifdef SCSI_NCR_BOOT_COMMAND_LINE_SUPPORT
665 while (cur
!= NULL
&& (pc
= strchr(cur
, ':')) != NULL
) {
677 val
= (int) simple_strtoul(pv
, &pe
, 0);
679 switch (get_setup_token(cur
)) {
681 driver_setup
.default_tags
= val
;
682 if (pe
&& *pe
== '/') {
684 while (*pe
&& *pe
!= ARG_SEP
&&
685 i
< sizeof(driver_setup
.tag_ctrl
)-1) {
686 driver_setup
.tag_ctrl
[i
++] = *pe
++;
688 driver_setup
.tag_ctrl
[i
] = '\0';
691 case OPT_MASTER_PARITY
:
692 driver_setup
.master_parity
= val
;
694 case OPT_SCSI_PARITY
:
695 driver_setup
.scsi_parity
= val
;
697 case OPT_DISCONNECTION
:
698 driver_setup
.disconnection
= val
;
700 case OPT_SPECIAL_FEATURES
:
701 driver_setup
.special_features
= val
;
703 case OPT_FORCE_SYNC_NEGO
:
704 driver_setup
.force_sync_nego
= val
;
706 case OPT_REVERSE_PROBE
:
707 driver_setup
.reverse_probe
= val
;
709 case OPT_DEFAULT_SYNC
:
710 driver_setup
.default_sync
= val
;
713 driver_setup
.verbose
= val
;
716 driver_setup
.debug
= val
;
719 driver_setup
.burst_max
= val
;
722 driver_setup
.led_pin
= val
;
725 driver_setup
.max_wide
= val
? 1:0;
727 case OPT_SETTLE_DELAY
:
728 driver_setup
.settle_delay
= val
;
730 case OPT_DIFF_SUPPORT
:
731 driver_setup
.diff_support
= val
;
734 driver_setup
.irqm
= val
;
737 driver_setup
.pci_fix_up
= val
;
740 driver_setup
.bus_check
= val
;
743 driver_setup
.optimize
= val
;
746 driver_setup
.recovery
= val
;
749 driver_setup
.use_nvram
= val
;
752 memcpy(&driver_setup
, &driver_safe_setup
,
753 sizeof(driver_setup
));
756 if (xi
< SCSI_NCR_MAX_EXCLUDES
)
757 driver_setup
.excludes
[xi
++] = val
;
760 driver_setup
.host_id
= val
;
762 #ifdef SCSI_NCR_IARB_SUPPORT
764 driver_setup
.iarb
= val
;
768 printk("sym53c8xx_setup: unexpected boot option '%.*s' ignored\n", (int)(pc
-cur
+1), cur
);
772 if ((cur
= strchr(cur
, ARG_SEP
)) != NULL
)
775 #endif /* SCSI_NCR_BOOT_COMMAND_LINE_SUPPORT */
780 /*===================================================================
782 ** Get device queue depth from boot command line.
784 **===================================================================
786 #define DEF_DEPTH (driver_setup.default_tags)
787 #define ALL_TARGETS -2
792 static int device_queue_depth(int unit
, int target
, int lun
)
795 char *p
= driver_setup
.tag_ctrl
;
801 while ((c
= *p
++) != 0) {
802 v
= simple_strtoul(p
, &ep
, 0);
811 t
= (target
== v
) ? v
: NO_TARGET
;
816 u
= (lun
== v
) ? v
: NO_LUN
;
820 (t
== ALL_TARGETS
|| t
== target
) &&
821 (u
== ALL_LUNS
|| u
== lun
))
837 /*==========================================================
839 ** The CCB done queue uses an array of CCB virtual
840 ** addresses. Empty entries are flagged using the bogus
841 ** virtual address 0xffffffff.
843 ** Since PCI ensures that only aligned DWORDs are accessed
844 ** atomically, 64 bit little-endian architecture requires
845 ** to test the high order DWORD of the entry to determine
846 ** if it is empty or valid.
848 ** BTW, I will make things differently as soon as I will
849 ** have a better idea, but this is simple and should work.
851 **==========================================================
854 #define SCSI_NCR_CCB_DONE_SUPPORT
855 #ifdef SCSI_NCR_CCB_DONE_SUPPORT
858 #define CCB_DONE_EMPTY 0xffffffffUL
860 /* All 32 bit architectures */
861 #if BITS_PER_LONG == 32
862 #define CCB_DONE_VALID(cp) (((u_long) cp) != CCB_DONE_EMPTY)
864 /* All > 32 bit (64 bit) architectures regardless endian-ness */
866 #define CCB_DONE_VALID(cp) \
867 ((((u_long) cp) & 0xffffffff00000000ul) && \
868 (((u_long) cp) & 0xfffffffful) != CCB_DONE_EMPTY)
871 #endif /* SCSI_NCR_CCB_DONE_SUPPORT */
873 /*==========================================================
875 ** Configuration and Debugging
877 **==========================================================
881 ** SCSI address of this device.
882 ** The boot routines should have set it.
886 #ifndef SCSI_NCR_MYADDR
887 #define SCSI_NCR_MYADDR (7)
891 ** The maximum number of tags per logic unit.
892 ** Used only for disk devices that support tags.
895 #ifndef SCSI_NCR_MAX_TAGS
896 #define SCSI_NCR_MAX_TAGS (8)
900 ** TAGS are actually limited to 64 tags/lun.
901 ** We need to deal with power of 2, for alignment constraints.
903 #if SCSI_NCR_MAX_TAGS > 64
904 #define MAX_TAGS (64)
906 #define MAX_TAGS SCSI_NCR_MAX_TAGS
912 ** Choose appropriate type for tag bitmap.
915 typedef u64 tagmap_t
;
917 typedef u32 tagmap_t
;
921 ** Number of targets supported by the driver.
922 ** n permits target numbers 0..n-1.
923 ** Default is 16, meaning targets #0..#15.
927 #ifdef SCSI_NCR_MAX_TARGET
928 #define MAX_TARGET (SCSI_NCR_MAX_TARGET)
930 #define MAX_TARGET (16)
934 ** Number of logic units supported by the driver.
935 ** n enables logic unit numbers 0..n-1.
936 ** The common SCSI devices require only
937 ** one lun, so take 1 as the default.
940 #ifdef SCSI_NCR_MAX_LUN
941 #define MAX_LUN SCSI_NCR_MAX_LUN
947 ** Asynchronous pre-scaler (ns). Shall be 40
950 #ifndef SCSI_NCR_MIN_ASYNC
951 #define SCSI_NCR_MIN_ASYNC (40)
955 ** The maximum number of jobs scheduled for starting.
956 ** There should be one slot per target, and one slot
957 ** for each tag of each target in use.
958 ** The calculation below is actually quite silly ...
961 #ifdef SCSI_NCR_CAN_QUEUE
962 #define MAX_START (SCSI_NCR_CAN_QUEUE + 4)
964 #define MAX_START (MAX_TARGET + 7 * MAX_TAGS)
968 ** We limit the max number of pending IO to 250.
969 ** since we donnot want to allocate more than 1
970 ** PAGE for 'scripth'.
974 #define MAX_START 250
978 ** The maximum number of segments a transfer is split into.
979 ** We support up to 127 segments for both read and write.
980 ** The data scripts are broken into 2 sub-scripts.
981 ** 80 (MAX_SCATTERL) segments are moved from a sub-script
982 ** in on-chip RAM. This makes data transfers shorter than
983 ** 80k (assuming 1k fs) as fast as possible.
986 #define MAX_SCATTER (SCSI_NCR_MAX_SCATTER)
988 #if (MAX_SCATTER > 80)
989 #define MAX_SCATTERL 80
990 #define MAX_SCATTERH (MAX_SCATTER - MAX_SCATTERL)
992 #define MAX_SCATTERL (MAX_SCATTER-1)
993 #define MAX_SCATTERH 1
1000 #define NCR_SNOOP_TIMEOUT (1000000)
1003 ** Other definitions
1006 #define initverbose (driver_setup.verbose)
1007 #define bootverbose (np->verbose)
1009 /*==========================================================
1011 ** Command control block states.
1013 **==========================================================
1018 #define HS_NEGOTIATE (2) /* sync/wide data transfer*/
1019 #define HS_DISCONNECT (3) /* Disconnected by target */
1021 #define HS_DONEMASK (0x80)
1022 #define HS_COMPLETE (4|HS_DONEMASK)
1023 #define HS_SEL_TIMEOUT (5|HS_DONEMASK) /* Selection timeout */
1024 #define HS_RESET (6|HS_DONEMASK) /* SCSI reset */
1025 #define HS_ABORTED (7|HS_DONEMASK) /* Transfer aborted */
1026 #define HS_TIMEOUT (8|HS_DONEMASK) /* Software timeout */
1027 #define HS_FAIL (9|HS_DONEMASK) /* SCSI or PCI bus errors */
1028 #define HS_UNEXPECTED (10|HS_DONEMASK)/* Unexpected disconnect */
1031 ** Invalid host status values used by the SCRIPTS processor
1032 ** when the nexus is not fully identified.
1033 ** Shall never appear in a CCB.
1036 #define HS_INVALMASK (0x40)
1037 #define HS_SELECTING (0|HS_INVALMASK)
1038 #define HS_IN_RESELECT (1|HS_INVALMASK)
1039 #define HS_STARTING (2|HS_INVALMASK)
1042 ** Flags set by the SCRIPT processor for commands
1043 ** that have been skipped.
1045 #define HS_SKIPMASK (0x20)
1047 /*==========================================================
1049 ** Software Interrupt Codes
1051 **==========================================================
1054 #define SIR_BAD_STATUS (1)
1055 #define SIR_XXXXXXXXXX (2)
1056 #define SIR_NEGO_SYNC (3)
1057 #define SIR_NEGO_WIDE (4)
1058 #define SIR_NEGO_FAILED (5)
1059 #define SIR_NEGO_PROTO (6)
1060 #define SIR_REJECT_RECEIVED (7)
1061 #define SIR_REJECT_SENT (8)
1062 #define SIR_IGN_RESIDUE (9)
1063 #define SIR_MISSING_SAVE (10)
1064 #define SIR_RESEL_NO_MSG_IN (11)
1065 #define SIR_RESEL_NO_IDENTIFY (12)
1066 #define SIR_RESEL_BAD_LUN (13)
1067 #define SIR_RESEL_BAD_TARGET (14)
1068 #define SIR_RESEL_BAD_I_T_L (15)
1069 #define SIR_RESEL_BAD_I_T_L_Q (16)
1070 #define SIR_DONE_OVERFLOW (17)
1071 #define SIR_INTFLY (18)
1072 #define SIR_MAX (18)
1074 /*==========================================================
1076 ** Extended error codes.
1077 ** xerr_status field of struct ccb.
1079 **==========================================================
1083 #define XE_EXTRA_DATA (1) /* unexpected data phase */
1084 #define XE_BAD_PHASE (2) /* illegal phase (4/5) */
1086 /*==========================================================
1088 ** Negotiation status.
1089 ** nego_status field of struct ccb.
1091 **==========================================================
1094 #define NS_NOCHANGE (0)
1099 /*==========================================================
1103 **==========================================================
1106 #define CCB_MAGIC (0xf2691ad2)
1108 /*==========================================================
1110 ** Declaration of structs.
1112 **==========================================================
1115 static struct scsi_transport_template
*ncr53c8xx_transport_template
= NULL
;
1135 #define UC_SETSYNC 10
1136 #define UC_SETTAGS 11
1137 #define UC_SETDEBUG 12
1138 #define UC_SETORDER 13
1139 #define UC_SETWIDE 14
1140 #define UC_SETFLAG 15
1141 #define UC_SETVERBOSE 17
1143 #define UF_TRACE (0x01)
1144 #define UF_NODISC (0x02)
1145 #define UF_NOSCAN (0x04)
1147 /*========================================================================
1149 ** Declaration of structs: target control block
1151 **========================================================================
1154 /*----------------------------------------------------------------
1155 ** During reselection the ncr jumps to this point with SFBR
1156 ** set to the encoded target number with bit 7 set.
1157 ** if it's not this target, jump to the next.
1159 ** JUMP IF (SFBR != #target#), @(next tcb)
1160 **----------------------------------------------------------------
1162 struct link jump_tcb
;
1164 /*----------------------------------------------------------------
1165 ** Load the actual values for the sxfer and the scntl3
1166 ** register (sync/wide mode).
1168 ** SCR_COPY (1), @(sval field of this tcb), @(sxfer register)
1169 ** SCR_COPY (1), @(wval field of this tcb), @(scntl3 register)
1170 **----------------------------------------------------------------
1174 /*----------------------------------------------------------------
1175 ** Get the IDENTIFY message and load the LUN to SFBR.
1177 ** CALL, <RESEL_LUN>
1178 **----------------------------------------------------------------
1180 struct link call_lun
;
1182 /*----------------------------------------------------------------
1183 ** Now look for the right lun.
1186 ** SCR_JUMP ^ IFTRUE(MASK(i, 3)), @(first lcb mod. i)
1188 ** Recent chips will prefetch the 4 JUMPS using only 1 burst.
1189 ** It is kind of hashcoding.
1190 **----------------------------------------------------------------
1192 struct link jump_lcb
[4]; /* JUMPs for reselection */
1193 struct lcb
* lp
[MAX_LUN
]; /* The lcb's of this tcb */
1195 /*----------------------------------------------------------------
1196 ** Pointer to the ccb used for negotiation.
1197 ** Prevent from starting a negotiation for all queued commands
1198 ** when tagged command queuing is enabled.
1199 **----------------------------------------------------------------
1201 struct ccb
* nego_cp
;
1203 /*----------------------------------------------------------------
1205 **----------------------------------------------------------------
1210 /*----------------------------------------------------------------
1211 ** negotiation of wide and synch transfer and device quirks.
1212 **----------------------------------------------------------------
1214 #ifdef SCSI_NCR_BIG_ENDIAN
1217 /*3*/ u_char minsync
;
1219 /*1*/ u_char widedone
;
1220 /*2*/ u_char quirks
;
1221 /*3*/ u_char maxoffs
;
1223 /*0*/ u_char minsync
;
1226 /*0*/ u_char maxoffs
;
1227 /*1*/ u_char quirks
;
1228 /*2*/ u_char widedone
;
1232 /* User settable limits and options. */
1237 struct scsi_target
*starget
;
1240 /*========================================================================
1242 ** Declaration of structs: lun control block
1244 **========================================================================
1247 /*----------------------------------------------------------------
1248 ** During reselection the ncr jumps to this point
1249 ** with SFBR set to the "Identify" message.
1250 ** if it's not this lun, jump to the next.
1252 ** JUMP IF (SFBR != #lun#), @(next lcb of this target)
1254 ** It is this lun. Load TEMP with the nexus jumps table
1255 ** address and jump to RESEL_TAG (or RESEL_NOTAG).
1257 ** SCR_COPY (4), p_jump_ccb, TEMP,
1258 ** SCR_JUMP, <RESEL_TAG>
1259 **----------------------------------------------------------------
1261 struct link jump_lcb
;
1262 ncrcmd load_jump_ccb
[3];
1263 struct link jump_tag
;
1264 ncrcmd p_jump_ccb
; /* Jump table bus address */
1266 /*----------------------------------------------------------------
1267 ** Jump table used by the script processor to directly jump
1268 ** to the CCB corresponding to the reselected nexus.
1269 ** Address is allocated on 256 bytes boundary in order to
1270 ** allow 8 bit calculation of the tag jump entry for up to
1271 ** 64 possible tags.
1272 **----------------------------------------------------------------
1274 u32 jump_ccb_0
; /* Default table if no tags */
1275 u32
*jump_ccb
; /* Virtual address */
1277 /*----------------------------------------------------------------
1278 ** CCB queue management.
1279 **----------------------------------------------------------------
1281 struct list_head free_ccbq
; /* Queue of available CCBs */
1282 struct list_head busy_ccbq
; /* Queue of busy CCBs */
1283 struct list_head wait_ccbq
; /* Queue of waiting for IO CCBs */
1284 struct list_head skip_ccbq
; /* Queue of skipped CCBs */
1285 u_char actccbs
; /* Number of allocated CCBs */
1286 u_char busyccbs
; /* CCBs busy for this lun */
1287 u_char queuedccbs
; /* CCBs queued to the controller*/
1288 u_char queuedepth
; /* Queue depth for this lun */
1289 u_char scdev_depth
; /* SCSI device queue depth */
1290 u_char maxnxs
; /* Max possible nexuses */
1292 /*----------------------------------------------------------------
1293 ** Control of tagged command queuing.
1294 ** Tags allocation is performed using a circular buffer.
1295 ** This avoids using a loop for tag allocation.
1296 **----------------------------------------------------------------
1298 u_char ia_tag
; /* Allocation index */
1299 u_char if_tag
; /* Freeing index */
1300 u_char cb_tags
[MAX_TAGS
]; /* Circular tags buffer */
1301 u_char usetags
; /* Command queuing is active */
1302 u_char maxtags
; /* Max nr of tags asked by user */
1303 u_char numtags
; /* Current number of tags */
1305 /*----------------------------------------------------------------
1306 ** QUEUE FULL control and ORDERED tag control.
1307 **----------------------------------------------------------------
1309 /*----------------------------------------------------------------
1310 ** QUEUE FULL and ORDERED tag control.
1311 **----------------------------------------------------------------
1313 u16 num_good
; /* Nr of GOOD since QUEUE FULL */
1314 tagmap_t tags_umap
; /* Used tags bitmap */
1315 tagmap_t tags_smap
; /* Tags in use at 'tag_stime' */
1316 u_long tags_stime
; /* Last time we set smap=umap */
1317 struct ccb
* held_ccb
; /* CCB held for QUEUE FULL */
1320 /*========================================================================
1322 ** Declaration of structs: the launch script.
1324 **========================================================================
1326 ** It is part of the CCB and is called by the scripts processor to
1327 ** start or restart the data structure (nexus).
1328 ** This 6 DWORDs mini script makes use of prefetching.
1330 **------------------------------------------------------------------------
1333 /*----------------------------------------------------------------
1334 ** SCR_COPY(4), @(p_phys), @(dsa register)
1335 ** SCR_JUMP, @(scheduler_point)
1336 **----------------------------------------------------------------
1338 ncrcmd setup_dsa
[3]; /* Copy 'phys' address to dsa */
1339 struct link schedule
; /* Jump to scheduler point */
1340 ncrcmd p_phys
; /* 'phys' header bus address */
1343 /*========================================================================
1345 ** Declaration of structs: global HEADER.
1347 **========================================================================
1349 ** This substructure is copied from the ccb to a global address after
1350 ** selection (or reselection) and copied back before disconnect.
1352 ** These fields are accessible to the script processor.
1354 **------------------------------------------------------------------------
1358 /*----------------------------------------------------------------
1359 ** Saved data pointer.
1360 ** Points to the position in the script responsible for the
1361 ** actual transfer transfer of data.
1362 ** It's written after reception of a SAVE_DATA_POINTER message.
1363 ** The goalpointer points after the last transfer command.
1364 **----------------------------------------------------------------
1370 /*----------------------------------------------------------------
1371 ** Alternate data pointer.
1372 ** They are copied back to savep/lastp/goalp by the SCRIPTS
1373 ** when the direction is unknown and the device claims data out.
1374 **----------------------------------------------------------------
1379 /*----------------------------------------------------------------
1380 ** The virtual address of the ccb containing this header.
1381 **----------------------------------------------------------------
1385 /*----------------------------------------------------------------
1387 **----------------------------------------------------------------
1389 u_char scr_st
[4]; /* script status */
1390 u_char status
[4]; /* host status. must be the */
1391 /* last DWORD of the header. */
1395 ** The status bytes are used by the host and the script processor.
1397 ** The byte corresponding to the host_status must be stored in the
1398 ** last DWORD of the CCB header since it is used for command
1399 ** completion (ncr_wakeup()). Doing so, we are sure that the header
1400 ** has been entirely copied back to the CCB when the host_status is
1401 ** seen complete by the CPU.
1403 ** The last four bytes (status[4]) are copied to the scratchb register
1404 ** (declared as scr0..scr3 in ncr_reg.h) just after the select/reselect,
1405 ** and copied back just after disconnecting.
1406 ** Inside the script the XX_REG are used.
1408 ** The first four bytes (scr_st[4]) are used inside the script by
1410 ** Because source and destination must have the same alignment
1411 ** in a DWORD, the fields HAVE to be at the chosen offsets.
1412 ** xerr_st 0 (0x34) scratcha
1413 ** sync_st 1 (0x05) sxfer
1414 ** wide_st 3 (0x03) scntl3
1418 ** Last four bytes (script)
1422 #define HS_PRT nc_scr1
1424 #define SS_PRT nc_scr2
1428 ** Last four bytes (host)
1430 #ifdef SCSI_NCR_BIG_ENDIAN
1431 #define actualquirks phys.header.status[3]
1432 #define host_status phys.header.status[2]
1433 #define scsi_status phys.header.status[1]
1434 #define parity_status phys.header.status[0]
1436 #define actualquirks phys.header.status[0]
1437 #define host_status phys.header.status[1]
1438 #define scsi_status phys.header.status[2]
1439 #define parity_status phys.header.status[3]
1443 ** First four bytes (script)
1445 #define xerr_st header.scr_st[0]
1446 #define sync_st header.scr_st[1]
1447 #define nego_st header.scr_st[2]
1448 #define wide_st header.scr_st[3]
1451 ** First four bytes (host)
1453 #define xerr_status phys.xerr_st
1454 #define nego_status phys.nego_st
1456 /*==========================================================
1458 ** Declaration of structs: Data structure block
1460 **==========================================================
1462 ** During execution of a ccb by the script processor,
1463 ** the DSA (data structure address) register points
1464 ** to this substructure of the ccb.
1465 ** This substructure contains the header with
1466 ** the script-processor-changeable data and
1467 ** data blocks for the indirect move commands.
1469 **----------------------------------------------------------
1481 ** Table data for Script
1484 struct scr_tblsel select
;
1485 struct scr_tblmove smsg
;
1486 struct scr_tblmove cmd
;
1487 struct scr_tblmove sense
;
1488 struct scr_tblmove data
[MAX_SCATTER
];
1492 /*========================================================================
1494 ** Declaration of structs: Command control block.
1496 **========================================================================
1499 /*----------------------------------------------------------------
1500 ** This is the data structure which is pointed by the DSA
1501 ** register when it is executed by the script processor.
1502 ** It must be the first entry because it contains the header
1503 ** as first entry that must be cache line aligned.
1504 **----------------------------------------------------------------
1508 /*----------------------------------------------------------------
1509 ** Mini-script used at CCB execution start-up.
1510 ** Load the DSA with the data structure address (phys) and
1511 ** jump to SELECT. Jump to CANCEL if CCB is to be canceled.
1512 **----------------------------------------------------------------
1514 struct launch start
;
1516 /*----------------------------------------------------------------
1517 ** Mini-script used at CCB relection to restart the nexus.
1518 ** Load the DSA with the data structure address (phys) and
1519 ** jump to RESEL_DSA. Jump to ABORT if CCB is to be aborted.
1520 **----------------------------------------------------------------
1522 struct launch restart
;
1524 /*----------------------------------------------------------------
1525 ** If a data transfer phase is terminated too early
1526 ** (after reception of a message (i.e. DISCONNECT)),
1527 ** we have to prepare a mini script to transfer
1528 ** the rest of the data.
1529 **----------------------------------------------------------------
1533 /*----------------------------------------------------------------
1534 ** The general SCSI driver provides a
1535 ** pointer to a control block.
1536 **----------------------------------------------------------------
1538 struct scsi_cmnd
*cmd
; /* SCSI command */
1539 u_char cdb_buf
[16]; /* Copy of CDB */
1540 u_char sense_buf
[64];
1541 int data_len
; /* Total data length */
1543 /*----------------------------------------------------------------
1545 ** We prepare a message to be sent after selection.
1546 ** We may use a second one if the command is rescheduled
1547 ** due to GETCC or QFULL.
1548 ** Contents are IDENTIFY and SIMPLE_TAG.
1549 ** While negotiating sync or wide transfer,
1550 ** a SDTR or WDTR message is appended.
1551 **----------------------------------------------------------------
1553 u_char scsi_smsg
[8];
1554 u_char scsi_smsg2
[8];
1556 /*----------------------------------------------------------------
1558 **----------------------------------------------------------------
1560 u_long p_ccb
; /* BUS address of this CCB */
1561 u_char sensecmd
[6]; /* Sense command */
1562 u_char tag
; /* Tag for this transfer */
1563 /* 255 means no tag */
1568 struct ccb
* link_ccb
; /* Host adapter CCB chain */
1569 struct list_head link_ccbq
; /* Link to unit CCB queue */
1570 u32 startp
; /* Initial data pointer */
1571 u_long magic
; /* Free / busy CCB flag */
1574 #define CCB_PHYS(cp,lbl) (cp->p_ccb + offsetof(struct ccb, lbl))
1577 /*========================================================================
1579 ** Declaration of structs: NCR device descriptor
1581 **========================================================================
1584 /*----------------------------------------------------------------
1585 ** The global header.
1586 ** It is accessible to both the host and the script processor.
1587 ** Must be cache line size aligned (32 for x86) in order to
1588 ** allow cache line bursting when it is copied to/from CCB.
1589 **----------------------------------------------------------------
1593 /*----------------------------------------------------------------
1594 ** CCBs management queues.
1595 **----------------------------------------------------------------
1597 struct scsi_cmnd
*waiting_list
; /* Commands waiting for a CCB */
1598 /* when lcb is not allocated. */
1599 struct scsi_cmnd
*done_list
; /* Commands waiting for done() */
1600 /* callback to be invoked. */
1601 spinlock_t smp_lock
; /* Lock for SMP threading */
1603 /*----------------------------------------------------------------
1604 ** Chip and controller identification.
1605 **----------------------------------------------------------------
1607 int unit
; /* Unit number */
1608 char inst_name
[16]; /* ncb instance name */
1610 /*----------------------------------------------------------------
1611 ** Initial value of some IO register bits.
1612 ** These values are assumed to have been set by BIOS, and may
1613 ** be used for probing adapter implementation differences.
1614 **----------------------------------------------------------------
1616 u_char sv_scntl0
, sv_scntl3
, sv_dmode
, sv_dcntl
, sv_ctest0
, sv_ctest3
,
1617 sv_ctest4
, sv_ctest5
, sv_gpcntl
, sv_stest2
, sv_stest4
;
1619 /*----------------------------------------------------------------
1620 ** Actual initial value of IO register bits used by the
1621 ** driver. They are loaded at initialisation according to
1622 ** features that are to be enabled.
1623 **----------------------------------------------------------------
1625 u_char rv_scntl0
, rv_scntl3
, rv_dmode
, rv_dcntl
, rv_ctest0
, rv_ctest3
,
1626 rv_ctest4
, rv_ctest5
, rv_stest2
;
1628 /*----------------------------------------------------------------
1629 ** Targets management.
1630 ** During reselection the ncr jumps to jump_tcb.
1631 ** The SFBR register is loaded with the encoded target id.
1633 ** SCR_JUMP ^ IFTRUE(MASK(i, 3)), @(next tcb mod. i)
1635 ** Recent chips will prefetch the 4 JUMPS using only 1 burst.
1636 ** It is kind of hashcoding.
1637 **----------------------------------------------------------------
1639 struct link jump_tcb
[4]; /* JUMPs for reselection */
1640 struct tcb target
[MAX_TARGET
]; /* Target data */
1642 /*----------------------------------------------------------------
1643 ** Virtual and physical bus addresses of the chip.
1644 **----------------------------------------------------------------
1646 void __iomem
*vaddr
; /* Virtual and bus address of */
1647 unsigned long paddr
; /* chip's IO registers. */
1648 unsigned long paddr2
; /* On-chip RAM bus address. */
1649 volatile /* Pointer to volatile for */
1650 struct ncr_reg __iomem
*reg
; /* memory mapped IO. */
1652 /*----------------------------------------------------------------
1653 ** SCRIPTS virtual and physical bus addresses.
1654 ** 'script' is loaded in the on-chip RAM if present.
1655 ** 'scripth' stays in main memory.
1656 **----------------------------------------------------------------
1658 struct script
*script0
; /* Copies of script and scripth */
1659 struct scripth
*scripth0
; /* relocated for this ncb. */
1660 struct scripth
*scripth
; /* Actual scripth virt. address */
1661 u_long p_script
; /* Actual script and scripth */
1662 u_long p_scripth
; /* bus addresses. */
1664 /*----------------------------------------------------------------
1665 ** General controller parameters and configuration.
1666 **----------------------------------------------------------------
1669 u_char revision_id
; /* PCI device revision id */
1670 u32 irq
; /* IRQ level */
1671 u32 features
; /* Chip features map */
1672 u_char myaddr
; /* SCSI id of the adapter */
1673 u_char maxburst
; /* log base 2 of dwords burst */
1674 u_char maxwide
; /* Maximum transfer width */
1675 u_char minsync
; /* Minimum sync period factor */
1676 u_char maxsync
; /* Maximum sync period factor */
1677 u_char maxoffs
; /* Max scsi offset */
1678 u_char multiplier
; /* Clock multiplier (1,2,4) */
1679 u_char clock_divn
; /* Number of clock divisors */
1680 u_long clock_khz
; /* SCSI clock frequency in KHz */
1682 /*----------------------------------------------------------------
1683 ** Start queue management.
1684 ** It is filled up by the host processor and accessed by the
1685 ** SCRIPTS processor in order to start SCSI commands.
1686 **----------------------------------------------------------------
1688 u16 squeueput
; /* Next free slot of the queue */
1689 u16 actccbs
; /* Number of allocated CCBs */
1690 u16 queuedccbs
; /* Number of CCBs in start queue*/
1691 u16 queuedepth
; /* Start queue depth */
1693 /*----------------------------------------------------------------
1695 **----------------------------------------------------------------
1697 struct timer_list timer
; /* Timer handler link header */
1699 u_long settle_time
; /* Resetting the SCSI BUS */
1701 /*----------------------------------------------------------------
1702 ** Debugging and profiling.
1703 **----------------------------------------------------------------
1705 struct ncr_reg regdump
; /* Register dump */
1706 u_long regtime
; /* Time it has been done */
1708 /*----------------------------------------------------------------
1709 ** Miscellaneous buffers accessed by the scripts-processor.
1710 ** They shall be DWORD aligned, because they may be read or
1711 ** written with a SCR_COPY script command.
1712 **----------------------------------------------------------------
1714 u_char msgout
[8]; /* Buffer for MESSAGE OUT */
1715 u_char msgin
[8]; /* Buffer for MESSAGE IN */
1716 u32 lastmsg
; /* Last SCSI message sent */
1717 u_char scratch
; /* Scratch for SCSI receive */
1719 /*----------------------------------------------------------------
1720 ** Miscellaneous configuration and status parameters.
1721 **----------------------------------------------------------------
1723 u_char disc
; /* Disconnection allowed */
1724 u_char scsi_mode
; /* Current SCSI BUS mode */
1725 u_char order
; /* Tag order to use */
1726 u_char verbose
; /* Verbosity for this controller*/
1727 int ncr_cache
; /* Used for cache test at init. */
1728 u_long p_ncb
; /* BUS address of this NCB */
1730 /*----------------------------------------------------------------
1731 ** Command completion handling.
1732 **----------------------------------------------------------------
1734 #ifdef SCSI_NCR_CCB_DONE_SUPPORT
1735 struct ccb
*(ccb_done
[MAX_DONE
]);
1738 /*----------------------------------------------------------------
1739 ** Fields that should be removed or changed.
1740 **----------------------------------------------------------------
1742 struct ccb
*ccb
; /* Global CCB */
1743 struct usrcmd user
; /* Command from user */
1744 volatile u_char release_stage
; /* Synchronisation stage on release */
1747 #define NCB_SCRIPT_PHYS(np,lbl) (np->p_script + offsetof (struct script, lbl))
1748 #define NCB_SCRIPTH_PHYS(np,lbl) (np->p_scripth + offsetof (struct scripth,lbl))
1750 /*==========================================================
1753 ** Script for NCR-Processor.
1755 ** Use ncr_script_fill() to create the variable parts.
1756 ** Use ncr_script_copy_and_bind() to make a copy and
1757 ** bind to physical addresses.
1760 **==========================================================
1762 ** We have to know the offsets of all labels before
1763 ** we reach them (for forward jumps).
1764 ** Therefore we declare a struct here.
1765 ** If you make changes inside the script,
1766 ** DONT FORGET TO CHANGE THE LENGTHS HERE!
1768 **----------------------------------------------------------
1772 ** For HP Zalon/53c720 systems, the Zalon interface
1773 ** between CPU and 53c720 does prefetches, which causes
1774 ** problems with self modifying scripts. The problem
1775 ** is overcome by calling a dummy subroutine after each
1776 ** modification, to force a refetch of the script on
1777 ** return from the subroutine.
1780 #ifdef CONFIG_NCR53C8XX_PREFETCH
1781 #define PREFETCH_FLUSH_CNT 2
1782 #define PREFETCH_FLUSH SCR_CALL, PADDRH (wait_dma),
1784 #define PREFETCH_FLUSH_CNT 0
1785 #define PREFETCH_FLUSH
1789 ** Script fragments which are loaded into the on-chip RAM
1790 ** of 825A, 875 and 895 chips.
1794 ncrcmd startpos
[ 1];
1796 ncrcmd select2
[ 9 + PREFETCH_FLUSH_CNT
];
1797 ncrcmd loadpos
[ 4];
1798 ncrcmd send_ident
[ 9];
1799 ncrcmd prepare
[ 6];
1800 ncrcmd prepare2
[ 7];
1801 ncrcmd command
[ 6];
1802 ncrcmd dispatch
[ 32];
1804 ncrcmd no_data
[ 17];
1807 ncrcmd msg_in2
[ 16];
1808 ncrcmd msg_bad
[ 4];
1810 ncrcmd cleanup
[ 6];
1811 ncrcmd complete
[ 9];
1812 ncrcmd cleanup_ok
[ 8 + PREFETCH_FLUSH_CNT
];
1813 ncrcmd cleanup0
[ 1];
1814 #ifndef SCSI_NCR_CCB_DONE_SUPPORT
1815 ncrcmd signal
[ 12];
1818 ncrcmd done_pos
[ 1];
1819 ncrcmd done_plug
[ 2];
1820 ncrcmd done_end
[ 7];
1822 ncrcmd save_dp
[ 7];
1823 ncrcmd restore_dp
[ 5];
1824 ncrcmd disconnect
[ 10];
1825 ncrcmd msg_out
[ 9];
1826 ncrcmd msg_out_done
[ 7];
1828 ncrcmd reselect
[ 8];
1829 ncrcmd reselected
[ 8];
1830 ncrcmd resel_dsa
[ 6 + PREFETCH_FLUSH_CNT
];
1831 ncrcmd loadpos1
[ 4];
1832 ncrcmd resel_lun
[ 6];
1833 ncrcmd resel_tag
[ 6];
1834 ncrcmd jump_to_nexus
[ 4 + PREFETCH_FLUSH_CNT
];
1835 ncrcmd nexus_indirect
[ 4];
1836 ncrcmd resel_notag
[ 4];
1837 ncrcmd data_in
[MAX_SCATTERL
* 4];
1838 ncrcmd data_in2
[ 4];
1839 ncrcmd data_out
[MAX_SCATTERL
* 4];
1840 ncrcmd data_out2
[ 4];
1844 ** Script fragments which stay in main memory for all chips.
1847 ncrcmd tryloop
[MAX_START
*2];
1848 ncrcmd tryloop2
[ 2];
1849 #ifdef SCSI_NCR_CCB_DONE_SUPPORT
1850 ncrcmd done_queue
[MAX_DONE
*5];
1851 ncrcmd done_queue2
[ 2];
1853 ncrcmd select_no_atn
[ 8];
1855 ncrcmd skip
[ 9 + PREFETCH_FLUSH_CNT
];
1857 ncrcmd par_err_data_in
[ 6];
1858 ncrcmd par_err_other
[ 4];
1859 ncrcmd msg_reject
[ 8];
1860 ncrcmd msg_ign_residue
[ 24];
1861 ncrcmd msg_extended
[ 10];
1862 ncrcmd msg_ext_2
[ 10];
1863 ncrcmd msg_wdtr
[ 14];
1864 ncrcmd send_wdtr
[ 7];
1865 ncrcmd msg_ext_3
[ 10];
1866 ncrcmd msg_sdtr
[ 14];
1867 ncrcmd send_sdtr
[ 7];
1868 ncrcmd nego_bad_phase
[ 4];
1869 ncrcmd msg_out_abort
[ 10];
1870 ncrcmd hdata_in
[MAX_SCATTERH
* 4];
1871 ncrcmd hdata_in2
[ 2];
1872 ncrcmd hdata_out
[MAX_SCATTERH
* 4];
1873 ncrcmd hdata_out2
[ 2];
1875 ncrcmd aborttag
[ 4];
1877 ncrcmd abort_resel
[ 20];
1878 ncrcmd resend_ident
[ 4];
1879 ncrcmd clratn_go_on
[ 3];
1880 ncrcmd nxtdsp_go_on
[ 1];
1881 ncrcmd sdata_in
[ 8];
1882 ncrcmd data_io
[ 18];
1883 ncrcmd bad_identify
[ 12];
1884 ncrcmd bad_i_t_l
[ 4];
1885 ncrcmd bad_i_t_l_q
[ 4];
1886 ncrcmd bad_target
[ 8];
1887 ncrcmd bad_status
[ 8];
1888 ncrcmd start_ram
[ 4 + PREFETCH_FLUSH_CNT
];
1889 ncrcmd start_ram0
[ 4];
1890 ncrcmd sto_restart
[ 5];
1891 ncrcmd wait_dma
[ 2];
1892 ncrcmd snooptest
[ 9];
1893 ncrcmd snoopend
[ 2];
1896 /*==========================================================
1899 ** Function headers.
1902 **==========================================================
1905 static void ncr_alloc_ccb (struct ncb
*np
, u_char tn
, u_char ln
);
1906 static void ncr_complete (struct ncb
*np
, struct ccb
*cp
);
1907 static void ncr_exception (struct ncb
*np
);
1908 static void ncr_free_ccb (struct ncb
*np
, struct ccb
*cp
);
1909 static void ncr_init_ccb (struct ncb
*np
, struct ccb
*cp
);
1910 static void ncr_init_tcb (struct ncb
*np
, u_char tn
);
1911 static struct lcb
* ncr_alloc_lcb (struct ncb
*np
, u_char tn
, u_char ln
);
1912 static struct lcb
* ncr_setup_lcb (struct ncb
*np
, struct scsi_device
*sdev
);
1913 static void ncr_getclock (struct ncb
*np
, int mult
);
1914 static void ncr_selectclock (struct ncb
*np
, u_char scntl3
);
1915 static struct ccb
*ncr_get_ccb (struct ncb
*np
, struct scsi_cmnd
*cmd
);
1916 static void ncr_chip_reset (struct ncb
*np
, int delay
);
1917 static void ncr_init (struct ncb
*np
, int reset
, char * msg
, u_long code
);
1918 static int ncr_int_sbmc (struct ncb
*np
);
1919 static int ncr_int_par (struct ncb
*np
);
1920 static void ncr_int_ma (struct ncb
*np
);
1921 static void ncr_int_sir (struct ncb
*np
);
1922 static void ncr_int_sto (struct ncb
*np
);
1923 static void ncr_negotiate (struct ncb
* np
, struct tcb
* tp
);
1924 static int ncr_prepare_nego(struct ncb
*np
, struct ccb
*cp
, u_char
*msgptr
);
1926 static void ncr_script_copy_and_bind
1927 (struct ncb
*np
, ncrcmd
*src
, ncrcmd
*dst
, int len
);
1928 static void ncr_script_fill (struct script
* scr
, struct scripth
* scripth
);
1929 static int ncr_scatter (struct ncb
*np
, struct ccb
*cp
, struct scsi_cmnd
*cmd
);
1930 static void ncr_getsync (struct ncb
*np
, u_char sfac
, u_char
*fakp
, u_char
*scntl3p
);
1931 static void ncr_setsync (struct ncb
*np
, struct ccb
*cp
, u_char scntl3
, u_char sxfer
);
1932 static void ncr_setup_tags (struct ncb
*np
, struct scsi_device
*sdev
);
1933 static void ncr_setwide (struct ncb
*np
, struct ccb
*cp
, u_char wide
, u_char ack
);
1934 static int ncr_snooptest (struct ncb
*np
);
1935 static void ncr_timeout (struct ncb
*np
);
1936 static void ncr_wakeup (struct ncb
*np
, u_long code
);
1937 static void ncr_wakeup_done (struct ncb
*np
);
1938 static void ncr_start_next_ccb (struct ncb
*np
, struct lcb
* lp
, int maxn
);
1939 static void ncr_put_start_queue(struct ncb
*np
, struct ccb
*cp
);
1941 static void insert_into_waiting_list(struct ncb
*np
, struct scsi_cmnd
*cmd
);
1942 static void process_waiting_list(struct ncb
*np
, int sts
);
1944 #define requeue_waiting_list(np) process_waiting_list((np), DID_OK)
1945 #define reset_waiting_list(np) process_waiting_list((np), DID_RESET)
1947 static inline char *ncr_name (struct ncb
*np
)
1949 return np
->inst_name
;
1953 /*==========================================================
1956 ** Scripts for NCR-Processor.
1958 ** Use ncr_script_bind for binding to physical addresses.
1961 **==========================================================
1963 ** NADDR generates a reference to a field of the controller data.
1964 ** PADDR generates a reference to another part of the script.
1965 ** RADDR generates a reference to a script processor register.
1966 ** FADDR generates a reference to a script processor register
1969 **----------------------------------------------------------
1972 #define RELOC_SOFTC 0x40000000
1973 #define RELOC_LABEL 0x50000000
1974 #define RELOC_REGISTER 0x60000000
1975 #define RELOC_LABELH 0x80000000
1976 #define RELOC_MASK 0xf0000000
1978 #define NADDR(label) (RELOC_SOFTC | offsetof(struct ncb, label))
1979 #define PADDR(label) (RELOC_LABEL | offsetof(struct script, label))
1980 #define PADDRH(label) (RELOC_LABELH | offsetof(struct scripth, label))
1981 #define RADDR(label) (RELOC_REGISTER | REG(label))
1982 #define FADDR(label,ofs)(RELOC_REGISTER | ((REG(label))+(ofs)))
1985 static struct script script0 __initdata
= {
1986 /*--------------------------< START >-----------------------*/ {
1988 ** This NOP will be patched with LED ON
1989 ** SCR_REG_REG (gpreg, SCR_AND, 0xfe)
1996 SCR_FROM_REG (ctest2
),
1999 ** Then jump to a certain point in tryloop.
2000 ** Due to the lack of indirect addressing the code
2001 ** is self modifying here.
2004 }/*-------------------------< STARTPOS >--------------------*/,{
2007 }/*-------------------------< SELECT >----------------------*/,{
2009 ** DSA contains the address of a scheduled
2012 ** SCRATCHA contains the address of the script,
2013 ** which starts the next entry.
2015 ** Set Initiator mode.
2017 ** (Target mode is left as an exercise for the reader)
2022 SCR_LOAD_REG (HS_REG
, HS_SELECTING
),
2026 ** And try to select this target.
2028 SCR_SEL_TBL_ATN
^ offsetof (struct dsb
, select
),
2031 }/*-------------------------< SELECT2 >----------------------*/,{
2033 ** Now there are 4 possibilities:
2035 ** (1) The ncr loses arbitration.
2036 ** This is ok, because it will try again,
2037 ** when the bus becomes idle.
2038 ** (But beware of the timeout function!)
2040 ** (2) The ncr is reselected.
2041 ** Then the script processor takes the jump
2042 ** to the RESELECT label.
2044 ** (3) The ncr wins arbitration.
2045 ** Then it will execute SCRIPTS instruction until
2046 ** the next instruction that checks SCSI phase.
2047 ** Then will stop and wait for selection to be
2048 ** complete or selection time-out to occur.
2049 ** As a result the SCRIPTS instructions until
2050 ** LOADPOS + 2 should be executed in parallel with
2051 ** the SCSI core performing selection.
2055 ** The MESSAGE_REJECT problem seems to be due to a selection
2057 ** Wait immediately for the selection to complete.
2058 ** (2.5x behaves so)
2060 SCR_JUMPR
^ IFFALSE (WHEN (SCR_MSG_OUT
)),
2064 ** Next time use the next slot.
2070 ** The ncr doesn't have an indirect load
2071 ** or store command. So we have to
2072 ** copy part of the control block to a
2073 ** fixed place, where we can access it.
2075 ** We patch the address part of a
2076 ** COPY command with the DSA-register.
2082 ** Flush script prefetch if required
2086 ** then we do the actual copy.
2088 SCR_COPY (sizeof (struct head
)),
2090 ** continued after the next label ...
2092 }/*-------------------------< LOADPOS >---------------------*/,{
2096 ** Wait for the next phase or the selection
2097 ** to complete or time-out.
2099 SCR_JUMP
^ IFFALSE (WHEN (SCR_MSG_OUT
)),
2102 }/*-------------------------< SEND_IDENT >----------------------*/,{
2104 ** Selection complete.
2105 ** Send the IDENTIFY and SIMPLE_TAG messages
2106 ** (and the EXTENDED_SDTR message)
2108 SCR_MOVE_TBL
^ SCR_MSG_OUT
,
2109 offsetof (struct dsb
, smsg
),
2110 SCR_JUMP
^ IFTRUE (WHEN (SCR_MSG_OUT
)),
2111 PADDRH (resend_ident
),
2112 SCR_LOAD_REG (scratcha
, 0x80),
2117 }/*-------------------------< PREPARE >----------------------*/,{
2119 ** load the savep (saved pointer) into
2120 ** the TEMP register (actual pointer)
2123 NADDR (header
.savep
),
2126 ** Initialize the status registers
2129 NADDR (header
.status
),
2131 }/*-------------------------< PREPARE2 >---------------------*/,{
2133 ** Initialize the msgout buffer with a NOOP message.
2135 SCR_LOAD_REG (scratcha
, NOP
),
2141 ** Anticipate the COMMAND phase.
2142 ** This is the normal case for initial selection.
2144 SCR_JUMP
^ IFFALSE (WHEN (SCR_COMMAND
)),
2147 }/*-------------------------< COMMAND >--------------------*/,{
2149 ** ... and send the command
2151 SCR_MOVE_TBL
^ SCR_COMMAND
,
2152 offsetof (struct dsb
, cmd
),
2154 ** If status is still HS_NEGOTIATE, negotiation failed.
2155 ** We check this here, since we want to do that
2158 SCR_FROM_REG (HS_REG
),
2160 SCR_INT
^ IFTRUE (DATA (HS_NEGOTIATE
)),
2163 }/*-----------------------< DISPATCH >----------------------*/,{
2165 ** MSG_IN is the only phase that shall be
2166 ** entered at least once for each (re)selection.
2167 ** So we test it first.
2169 SCR_JUMP
^ IFTRUE (WHEN (SCR_MSG_IN
)),
2172 SCR_RETURN
^ IFTRUE (IF (SCR_DATA_OUT
)),
2175 ** DEL 397 - 53C875 Rev 3 - Part Number 609-0392410 - ITEM 4.
2176 ** Possible data corruption during Memory Write and Invalidate.
2177 ** This work-around resets the addressing logic prior to the
2178 ** start of the first MOVE of a DATA IN phase.
2179 ** (See Documentation/scsi/ncr53c8xx.rst for more information)
2181 SCR_JUMPR
^ IFFALSE (IF (SCR_DATA_IN
)),
2188 SCR_JUMP
^ IFTRUE (IF (SCR_STATUS
)),
2190 SCR_JUMP
^ IFTRUE (IF (SCR_COMMAND
)),
2192 SCR_JUMP
^ IFTRUE (IF (SCR_MSG_OUT
)),
2195 ** Discard one illegal phase byte, if required.
2197 SCR_LOAD_REG (scratcha
, XE_BAD_PHASE
),
2202 SCR_JUMPR
^ IFFALSE (IF (SCR_ILG_OUT
)),
2204 SCR_MOVE_ABS (1) ^ SCR_ILG_OUT
,
2206 SCR_JUMPR
^ IFFALSE (IF (SCR_ILG_IN
)),
2208 SCR_MOVE_ABS (1) ^ SCR_ILG_IN
,
2213 }/*-------------------------< CLRACK >----------------------*/,{
2215 ** Terminate possible pending message phase.
2222 }/*-------------------------< NO_DATA >--------------------*/,{
2224 ** The target wants to tranfer too much data
2225 ** or in the wrong direction.
2226 ** Remember that in extended error.
2228 SCR_LOAD_REG (scratcha
, XE_EXTRA_DATA
),
2234 ** Discard one data byte, if required.
2236 SCR_JUMPR
^ IFFALSE (WHEN (SCR_DATA_OUT
)),
2238 SCR_MOVE_ABS (1) ^ SCR_DATA_OUT
,
2240 SCR_JUMPR
^ IFFALSE (IF (SCR_DATA_IN
)),
2242 SCR_MOVE_ABS (1) ^ SCR_DATA_IN
,
2245 ** .. and repeat as required.
2252 }/*-------------------------< STATUS >--------------------*/,{
2256 SCR_MOVE_ABS (1) ^ SCR_STATUS
,
2259 ** save status to scsi_status.
2260 ** mark as complete.
2262 SCR_TO_REG (SS_REG
),
2264 SCR_LOAD_REG (HS_REG
, HS_COMPLETE
),
2268 }/*-------------------------< MSG_IN >--------------------*/,{
2270 ** Get the first byte of the message
2271 ** and save it to SCRATCHA.
2273 ** The script processor doesn't negate the
2274 ** ACK signal after this transfer.
2276 SCR_MOVE_ABS (1) ^ SCR_MSG_IN
,
2278 }/*-------------------------< MSG_IN2 >--------------------*/,{
2280 ** Handle this message.
2282 SCR_JUMP
^ IFTRUE (DATA (COMMAND_COMPLETE
)),
2284 SCR_JUMP
^ IFTRUE (DATA (DISCONNECT
)),
2286 SCR_JUMP
^ IFTRUE (DATA (SAVE_POINTERS
)),
2288 SCR_JUMP
^ IFTRUE (DATA (RESTORE_POINTERS
)),
2290 SCR_JUMP
^ IFTRUE (DATA (EXTENDED_MESSAGE
)),
2291 PADDRH (msg_extended
),
2292 SCR_JUMP
^ IFTRUE (DATA (NOP
)),
2294 SCR_JUMP
^ IFTRUE (DATA (MESSAGE_REJECT
)),
2295 PADDRH (msg_reject
),
2296 SCR_JUMP
^ IFTRUE (DATA (IGNORE_WIDE_RESIDUE
)),
2297 PADDRH (msg_ign_residue
),
2299 ** Rest of the messages left as
2302 ** Unimplemented messages:
2303 ** fall through to MSG_BAD.
2305 }/*-------------------------< MSG_BAD >------------------*/,{
2307 ** unimplemented message - reject it.
2311 SCR_LOAD_REG (scratcha
, MESSAGE_REJECT
),
2313 }/*-------------------------< SETMSG >----------------------*/,{
2321 }/*-------------------------< CLEANUP >-------------------*/,{
2323 ** dsa: Pointer to ccb
2324 ** or xxxxxxFF (no ccb)
2326 ** HS_REG: Host-Status (<>0!)
2330 SCR_JUMP
^ IFTRUE (DATA (0xff)),
2334 ** complete the cleanup.
2339 }/*-------------------------< COMPLETE >-----------------*/,{
2341 ** Complete message.
2343 ** Copy TEMP register to LASTP in header.
2347 NADDR (header
.lastp
),
2349 ** When we terminate the cycle by clearing ACK,
2350 ** the target may disconnect immediately.
2352 ** We don't want to be told of an
2353 ** "unexpected disconnect",
2354 ** so we disable this feature.
2356 SCR_REG_REG (scntl2
, SCR_AND
, 0x7f),
2359 ** Terminate cycle ...
2361 SCR_CLR (SCR_ACK
|SCR_ATN
),
2364 ** ... and wait for the disconnect.
2368 }/*-------------------------< CLEANUP_OK >----------------*/,{
2370 ** Save host status to header.
2374 NADDR (header
.status
),
2376 ** and copy back the header to the ccb.
2382 ** Flush script prefetch if required
2385 SCR_COPY (sizeof (struct head
)),
2387 }/*-------------------------< CLEANUP0 >--------------------*/,{
2389 }/*-------------------------< SIGNAL >----------------------*/,{
2391 ** if job not completed ...
2393 SCR_FROM_REG (HS_REG
),
2396 ** ... start the next command.
2398 SCR_JUMP
^ IFTRUE (MASK (0, (HS_DONEMASK
|HS_SKIPMASK
))),
2401 ** If command resulted in not GOOD status,
2402 ** call the C code if needed.
2404 SCR_FROM_REG (SS_REG
),
2406 SCR_CALL
^ IFFALSE (DATA (SAM_STAT_GOOD
)),
2407 PADDRH (bad_status
),
2409 #ifndef SCSI_NCR_CCB_DONE_SUPPORT
2412 ** ... signal completion to the host
2417 ** Auf zu neuen Schandtaten!
2422 #else /* defined SCSI_NCR_CCB_DONE_SUPPORT */
2425 ** ... signal completion to the host
2428 }/*------------------------< DONE_POS >---------------------*/,{
2429 PADDRH (done_queue
),
2430 }/*------------------------< DONE_PLUG >--------------------*/,{
2433 }/*------------------------< DONE_END >---------------------*/,{
2442 #endif /* SCSI_NCR_CCB_DONE_SUPPORT */
2444 }/*-------------------------< SAVE_DP >------------------*/,{
2447 ** Copy TEMP register to SAVEP in header.
2451 NADDR (header
.savep
),
2456 }/*-------------------------< RESTORE_DP >---------------*/,{
2458 ** RESTORE_DP message:
2459 ** Copy SAVEP in header to TEMP register.
2462 NADDR (header
.savep
),
2467 }/*-------------------------< DISCONNECT >---------------*/,{
2469 ** DISCONNECTing ...
2471 ** disable the "unexpected disconnect" feature,
2472 ** and remove the ACK signal.
2474 SCR_REG_REG (scntl2
, SCR_AND
, 0x7f),
2476 SCR_CLR (SCR_ACK
|SCR_ATN
),
2479 ** Wait for the disconnect.
2484 ** Status is: DISCONNECTED.
2486 SCR_LOAD_REG (HS_REG
, HS_DISCONNECT
),
2491 }/*-------------------------< MSG_OUT >-------------------*/,{
2493 ** The target requests a message.
2495 SCR_MOVE_ABS (1) ^ SCR_MSG_OUT
,
2501 ** If it was no ABORT message ...
2503 SCR_JUMP
^ IFTRUE (DATA (ABORT_TASK_SET
)),
2504 PADDRH (msg_out_abort
),
2506 ** ... wait for the next phase
2507 ** if it's a message out, send it again, ...
2509 SCR_JUMP
^ IFTRUE (WHEN (SCR_MSG_OUT
)),
2511 }/*-------------------------< MSG_OUT_DONE >--------------*/,{
2513 ** ... else clear the message ...
2515 SCR_LOAD_REG (scratcha
, NOP
),
2521 ** ... and process the next phase
2525 }/*-------------------------< IDLE >------------------------*/,{
2528 ** Wait for reselect.
2529 ** This NOP will be patched with LED OFF
2530 ** SCR_REG_REG (gpreg, SCR_OR, 0x01)
2534 }/*-------------------------< RESELECT >--------------------*/,{
2536 ** make the DSA invalid.
2538 SCR_LOAD_REG (dsa
, 0xff),
2542 SCR_LOAD_REG (HS_REG
, HS_IN_RESELECT
),
2545 ** Sleep waiting for a reselection.
2546 ** If SIGP is set, special treatment.
2548 ** Zu allem bereit ..
2552 }/*-------------------------< RESELECTED >------------------*/,{
2554 ** This NOP will be patched with LED ON
2555 ** SCR_REG_REG (gpreg, SCR_AND, 0xfe)
2560 ** ... zu nichts zu gebrauchen ?
2562 ** load the target id into the SFBR
2563 ** and jump to the control block.
2565 ** Look at the declarations of
2570 ** to understand what's going on.
2572 SCR_REG_SFBR (ssid
, SCR_AND
, 0x8F),
2579 }/*-------------------------< RESEL_DSA >-------------------*/,{
2581 ** Ack the IDENTIFY or TAG previously received.
2586 ** The ncr doesn't have an indirect load
2587 ** or store command. So we have to
2588 ** copy part of the control block to a
2589 ** fixed place, where we can access it.
2591 ** We patch the address part of a
2592 ** COPY command with the DSA-register.
2598 ** Flush script prefetch if required
2602 ** then we do the actual copy.
2604 SCR_COPY (sizeof (struct head
)),
2606 ** continued after the next label ...
2609 }/*-------------------------< LOADPOS1 >-------------------*/,{
2613 ** The DSA contains the data structure address.
2618 }/*-------------------------< RESEL_LUN >-------------------*/,{
2620 ** come back to this point
2621 ** to get an IDENTIFY message
2622 ** Wait for a msg_in phase.
2624 SCR_INT
^ IFFALSE (WHEN (SCR_MSG_IN
)),
2625 SIR_RESEL_NO_MSG_IN
,
2628 ** Read the data directly from the BUS DATA lines.
2629 ** This helps to support very old SCSI devices that
2630 ** may reselect without sending an IDENTIFY.
2632 SCR_FROM_REG (sbdl
),
2635 ** It should be an Identify message.
2639 }/*-------------------------< RESEL_TAG >-------------------*/,{
2641 ** Read IDENTIFY + SIMPLE + TAG using a single MOVE.
2642 ** Aggressive optimization, is'nt it?
2643 ** No need to test the SIMPLE TAG message, since the
2644 ** driver only supports conformant devices for tags. ;-)
2646 SCR_MOVE_ABS (3) ^ SCR_MSG_IN
,
2649 ** Read the TAG from the SIDL.
2650 ** Still an aggressive optimization. ;-)
2651 ** Compute the CCB indirect jump address which
2652 ** is (#TAG*2 & 0xfc) due to tag numbering using
2653 ** 1,3,5..MAXTAGS*2+1 actual values.
2655 SCR_REG_SFBR (sidl
, SCR_SHL
, 0),
2657 SCR_SFBR_REG (temp
, SCR_AND
, 0xfc),
2659 }/*-------------------------< JUMP_TO_NEXUS >-------------------*/,{
2662 PADDR (nexus_indirect
),
2664 ** Flush script prefetch if required
2668 }/*-------------------------< NEXUS_INDIRECT >-------------------*/,{
2673 }/*-------------------------< RESEL_NOTAG >-------------------*/,{
2676 ** Read an throw away the IDENTIFY.
2678 SCR_MOVE_ABS (1) ^ SCR_MSG_IN
,
2681 PADDR (jump_to_nexus
),
2682 }/*-------------------------< DATA_IN >--------------------*/,{
2684 ** Because the size depends on the
2685 ** #define MAX_SCATTERL parameter,
2686 ** it is filled in at runtime.
2688 ** ##===========< i=0; i<MAX_SCATTERL >=========
2689 ** || SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_IN)),
2690 ** || PADDR (dispatch),
2691 ** || SCR_MOVE_TBL ^ SCR_DATA_IN,
2692 ** || offsetof (struct dsb, data[ i]),
2693 ** ##==========================================
2695 **---------------------------------------------------------
2698 }/*-------------------------< DATA_IN2 >-------------------*/,{
2703 }/*-------------------------< DATA_OUT >--------------------*/,{
2705 ** Because the size depends on the
2706 ** #define MAX_SCATTERL parameter,
2707 ** it is filled in at runtime.
2709 ** ##===========< i=0; i<MAX_SCATTERL >=========
2710 ** || SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_OUT)),
2711 ** || PADDR (dispatch),
2712 ** || SCR_MOVE_TBL ^ SCR_DATA_OUT,
2713 ** || offsetof (struct dsb, data[ i]),
2714 ** ##==========================================
2716 **---------------------------------------------------------
2719 }/*-------------------------< DATA_OUT2 >-------------------*/,{
2724 }/*--------------------------------------------------------*/
2727 static struct scripth scripth0 __initdata
= {
2728 /*-------------------------< TRYLOOP >---------------------*/{
2730 ** Start the next entry.
2731 ** Called addresses point to the launch script in the CCB.
2732 ** They are patched by the main processor.
2734 ** Because the size depends on the
2735 ** #define MAX_START parameter, it is filled
2738 **-----------------------------------------------------------
2740 ** ##===========< I=0; i<MAX_START >===========
2743 ** ##==========================================
2745 **-----------------------------------------------------------
2748 }/*------------------------< TRYLOOP2 >---------------------*/,{
2752 #ifdef SCSI_NCR_CCB_DONE_SUPPORT
2754 }/*------------------------< DONE_QUEUE >-------------------*/,{
2756 ** Copy the CCB address to the next done entry.
2757 ** Because the size depends on the
2758 ** #define MAX_DONE parameter, it is filled
2761 **-----------------------------------------------------------
2763 ** ##===========< I=0; i<MAX_DONE >===========
2764 ** || SCR_COPY (sizeof(struct ccb *),
2765 ** || NADDR (header.cp),
2766 ** || NADDR (ccb_done[i]),
2768 ** || PADDR (done_end),
2769 ** ##==========================================
2771 **-----------------------------------------------------------
2774 }/*------------------------< DONE_QUEUE2 >------------------*/,{
2776 PADDRH (done_queue
),
2778 #endif /* SCSI_NCR_CCB_DONE_SUPPORT */
2779 }/*------------------------< SELECT_NO_ATN >-----------------*/,{
2781 ** Set Initiator mode.
2782 ** And try to select this target without ATN.
2787 SCR_LOAD_REG (HS_REG
, HS_SELECTING
),
2789 SCR_SEL_TBL
^ offsetof (struct dsb
, select
),
2794 }/*-------------------------< CANCEL >------------------------*/,{
2796 SCR_LOAD_REG (scratcha
, HS_ABORTED
),
2800 }/*-------------------------< SKIP >------------------------*/,{
2801 SCR_LOAD_REG (scratcha
, 0),
2804 ** This entry has been canceled.
2805 ** Next time use the next slot.
2811 ** The ncr doesn't have an indirect load
2812 ** or store command. So we have to
2813 ** copy part of the control block to a
2814 ** fixed place, where we can access it.
2816 ** We patch the address part of a
2817 ** COPY command with the DSA-register.
2823 ** Flush script prefetch if required
2827 ** then we do the actual copy.
2829 SCR_COPY (sizeof (struct head
)),
2831 ** continued after the next label ...
2833 }/*-------------------------< SKIP2 >---------------------*/,{
2837 ** Initialize the status registers
2840 NADDR (header
.status
),
2843 ** Force host status.
2845 SCR_FROM_REG (scratcha
),
2847 SCR_JUMPR
^ IFFALSE (MASK (0, HS_DONEMASK
)),
2849 SCR_REG_REG (HS_REG
, SCR_OR
, HS_SKIPMASK
),
2853 SCR_TO_REG (HS_REG
),
2855 SCR_LOAD_REG (SS_REG
, SAM_STAT_GOOD
),
2860 },/*-------------------------< PAR_ERR_DATA_IN >---------------*/{
2862 ** Ignore all data in byte, until next phase
2864 SCR_JUMP
^ IFFALSE (WHEN (SCR_DATA_IN
)),
2865 PADDRH (par_err_other
),
2866 SCR_MOVE_ABS (1) ^ SCR_DATA_IN
,
2870 },/*-------------------------< PAR_ERR_OTHER >------------------*/{
2874 SCR_REG_REG (PS_REG
, SCR_ADD
, 0x01),
2877 ** jump to dispatcher.
2881 }/*-------------------------< MSG_REJECT >---------------*/,{
2883 ** If a negotiation was in progress,
2884 ** negotiation failed.
2885 ** Otherwise, let the C code print
2888 SCR_FROM_REG (HS_REG
),
2890 SCR_INT
^ IFFALSE (DATA (HS_NEGOTIATE
)),
2891 SIR_REJECT_RECEIVED
,
2892 SCR_INT
^ IFTRUE (DATA (HS_NEGOTIATE
)),
2897 }/*-------------------------< MSG_IGN_RESIDUE >----------*/,{
2903 SCR_JUMP
^ IFFALSE (WHEN (SCR_MSG_IN
)),
2906 ** get residue size.
2908 SCR_MOVE_ABS (1) ^ SCR_MSG_IN
,
2911 ** Size is 0 .. ignore message.
2913 SCR_JUMP
^ IFTRUE (DATA (0)),
2916 ** Size is not 1 .. have to interrupt.
2918 SCR_JUMPR
^ IFFALSE (DATA (1)),
2921 ** Check for residue byte in swide register
2923 SCR_FROM_REG (scntl2
),
2925 SCR_JUMPR
^ IFFALSE (MASK (WSR
, WSR
)),
2928 ** There IS data in the swide register.
2931 SCR_REG_REG (scntl2
, SCR_OR
, WSR
),
2936 ** Load again the size to the sfbr register.
2938 SCR_FROM_REG (scratcha
),
2945 }/*-------------------------< MSG_EXTENDED >-------------*/,{
2951 SCR_JUMP
^ IFFALSE (WHEN (SCR_MSG_IN
)),
2956 SCR_MOVE_ABS (1) ^ SCR_MSG_IN
,
2960 SCR_JUMP
^ IFTRUE (DATA (3)),
2962 SCR_JUMP
^ IFFALSE (DATA (2)),
2964 }/*-------------------------< MSG_EXT_2 >----------------*/,{
2967 SCR_JUMP
^ IFFALSE (WHEN (SCR_MSG_IN
)),
2970 ** get extended message code.
2972 SCR_MOVE_ABS (1) ^ SCR_MSG_IN
,
2974 SCR_JUMP
^ IFTRUE (DATA (EXTENDED_WDTR
)),
2977 ** unknown extended message
2981 }/*-------------------------< MSG_WDTR >-----------------*/,{
2984 SCR_JUMP
^ IFFALSE (WHEN (SCR_MSG_IN
)),
2987 ** get data bus width
2989 SCR_MOVE_ABS (1) ^ SCR_MSG_IN
,
2992 ** let the host do the real work.
2997 ** let the target fetch our answer.
3003 SCR_JUMP
^ IFFALSE (WHEN (SCR_MSG_OUT
)),
3004 PADDRH (nego_bad_phase
),
3006 }/*-------------------------< SEND_WDTR >----------------*/,{
3008 ** Send the EXTENDED_WDTR
3010 SCR_MOVE_ABS (4) ^ SCR_MSG_OUT
,
3016 PADDR (msg_out_done
),
3018 }/*-------------------------< MSG_EXT_3 >----------------*/,{
3021 SCR_JUMP
^ IFFALSE (WHEN (SCR_MSG_IN
)),
3024 ** get extended message code.
3026 SCR_MOVE_ABS (1) ^ SCR_MSG_IN
,
3028 SCR_JUMP
^ IFTRUE (DATA (EXTENDED_SDTR
)),
3031 ** unknown extended message
3036 }/*-------------------------< MSG_SDTR >-----------------*/,{
3039 SCR_JUMP
^ IFFALSE (WHEN (SCR_MSG_IN
)),
3042 ** get period and offset
3044 SCR_MOVE_ABS (2) ^ SCR_MSG_IN
,
3047 ** let the host do the real work.
3052 ** let the target fetch our answer.
3058 SCR_JUMP
^ IFFALSE (WHEN (SCR_MSG_OUT
)),
3059 PADDRH (nego_bad_phase
),
3061 }/*-------------------------< SEND_SDTR >-------------*/,{
3063 ** Send the EXTENDED_SDTR
3065 SCR_MOVE_ABS (5) ^ SCR_MSG_OUT
,
3071 PADDR (msg_out_done
),
3073 }/*-------------------------< NEGO_BAD_PHASE >------------*/,{
3079 }/*-------------------------< MSG_OUT_ABORT >-------------*/,{
3081 ** After ABORT message,
3083 ** expect an immediate disconnect, ...
3085 SCR_REG_REG (scntl2
, SCR_AND
, 0x7f),
3087 SCR_CLR (SCR_ACK
|SCR_ATN
),
3092 ** ... and set the status to "ABORTED"
3094 SCR_LOAD_REG (HS_REG
, HS_ABORTED
),
3099 }/*-------------------------< HDATA_IN >-------------------*/,{
3101 ** Because the size depends on the
3102 ** #define MAX_SCATTERH parameter,
3103 ** it is filled in at runtime.
3105 ** ##==< i=MAX_SCATTERL; i<MAX_SCATTERL+MAX_SCATTERH >==
3106 ** || SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_IN)),
3107 ** || PADDR (dispatch),
3108 ** || SCR_MOVE_TBL ^ SCR_DATA_IN,
3109 ** || offsetof (struct dsb, data[ i]),
3110 ** ##===================================================
3112 **---------------------------------------------------------
3115 }/*-------------------------< HDATA_IN2 >------------------*/,{
3119 }/*-------------------------< HDATA_OUT >-------------------*/,{
3121 ** Because the size depends on the
3122 ** #define MAX_SCATTERH parameter,
3123 ** it is filled in at runtime.
3125 ** ##==< i=MAX_SCATTERL; i<MAX_SCATTERL+MAX_SCATTERH >==
3126 ** || SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_OUT)),
3127 ** || PADDR (dispatch),
3128 ** || SCR_MOVE_TBL ^ SCR_DATA_OUT,
3129 ** || offsetof (struct dsb, data[ i]),
3130 ** ##===================================================
3132 **---------------------------------------------------------
3135 }/*-------------------------< HDATA_OUT2 >------------------*/,{
3139 }/*-------------------------< RESET >----------------------*/,{
3141 ** Send a TARGET_RESET message if bad IDENTIFY
3142 ** received on reselection.
3144 SCR_LOAD_REG (scratcha
, ABORT_TASK
),
3147 PADDRH (abort_resel
),
3148 }/*-------------------------< ABORTTAG >-------------------*/,{
3150 ** Abort a wrong tag received on reselection.
3152 SCR_LOAD_REG (scratcha
, ABORT_TASK
),
3155 PADDRH (abort_resel
),
3156 }/*-------------------------< ABORT >----------------------*/,{
3158 ** Abort a reselection when no active CCB.
3160 SCR_LOAD_REG (scratcha
, ABORT_TASK_SET
),
3162 }/*-------------------------< ABORT_RESEL >----------------*/,{
3172 ** we expect an immediate disconnect
3174 SCR_REG_REG (scntl2
, SCR_AND
, 0x7f),
3176 SCR_MOVE_ABS (1) ^ SCR_MSG_OUT
,
3181 SCR_CLR (SCR_ACK
|SCR_ATN
),
3187 }/*-------------------------< RESEND_IDENT >-------------------*/,{
3189 ** The target stays in MSG OUT phase after having acked
3190 ** Identify [+ Tag [+ Extended message ]]. Targets shall
3191 ** behave this way on parity error.
3192 ** We must send it again all the messages.
3194 SCR_SET (SCR_ATN
), /* Shall be asserted 2 deskew delays before the */
3195 0, /* 1rst ACK = 90 ns. Hope the NCR is'nt too fast */
3198 }/*-------------------------< CLRATN_GO_ON >-------------------*/,{
3202 }/*-------------------------< NXTDSP_GO_ON >-------------------*/,{
3204 }/*-------------------------< SDATA_IN >-------------------*/,{
3205 SCR_CALL
^ IFFALSE (WHEN (SCR_DATA_IN
)),
3207 SCR_MOVE_TBL
^ SCR_DATA_IN
,
3208 offsetof (struct dsb
, sense
),
3213 }/*-------------------------< DATA_IO >--------------------*/,{
3215 ** We jump here if the data direction was unknown at the
3216 ** time we had to queue the command to the scripts processor.
3217 ** Pointers had been set as follow in this situation:
3218 ** savep --> DATA_IO
3219 ** lastp --> start pointer when DATA_IN
3220 ** goalp --> goal pointer when DATA_IN
3221 ** wlastp --> start pointer when DATA_OUT
3222 ** wgoalp --> goal pointer when DATA_OUT
3223 ** This script sets savep/lastp/goalp according to the
3224 ** direction chosen by the target.
3226 SCR_JUMPR
^ IFTRUE (WHEN (SCR_DATA_OUT
)),
3229 ** Direction is DATA IN.
3230 ** Warning: we jump here, even when phase is DATA OUT.
3233 NADDR (header
.lastp
),
3234 NADDR (header
.savep
),
3237 ** Jump to the SCRIPTS according to actual direction.
3240 NADDR (header
.savep
),
3245 ** Direction is DATA OUT.
3248 NADDR (header
.wlastp
),
3249 NADDR (header
.lastp
),
3251 NADDR (header
.wgoalp
),
3252 NADDR (header
.goalp
),
3255 }/*-------------------------< BAD_IDENTIFY >---------------*/,{
3257 ** If message phase but not an IDENTIFY,
3258 ** get some help from the C code.
3259 ** Old SCSI device may behave so.
3261 SCR_JUMPR
^ IFTRUE (MASK (0x80, 0x80)),
3264 SIR_RESEL_NO_IDENTIFY
,
3268 ** Message is an IDENTIFY, but lun is unknown.
3269 ** Read the message, since we got it directly
3270 ** from the SCSI BUS data lines.
3271 ** Signal problem to C code for logging the event.
3272 ** Send an ABORT_TASK_SET to clear all pending tasks.
3276 SCR_MOVE_ABS (1) ^ SCR_MSG_IN
,
3280 }/*-------------------------< BAD_I_T_L >------------------*/,{
3282 ** We donnot have a task for that I_T_L.
3283 ** Signal problem to C code for logging the event.
3284 ** Send an ABORT_TASK_SET message.
3287 SIR_RESEL_BAD_I_T_L
,
3290 }/*-------------------------< BAD_I_T_L_Q >----------------*/,{
3292 ** We donnot have a task that matches the tag.
3293 ** Signal problem to C code for logging the event.
3294 ** Send an ABORT_TASK message.
3297 SIR_RESEL_BAD_I_T_L_Q
,
3300 }/*-------------------------< BAD_TARGET >-----------------*/,{
3302 ** We donnot know the target that reselected us.
3303 ** Grab the first message if any (IDENTIFY).
3304 ** Signal problem to C code for logging the event.
3305 ** TARGET_RESET message.
3308 SIR_RESEL_BAD_TARGET
,
3309 SCR_JUMPR
^ IFFALSE (WHEN (SCR_MSG_IN
)),
3311 SCR_MOVE_ABS (1) ^ SCR_MSG_IN
,
3315 }/*-------------------------< BAD_STATUS >-----------------*/,{
3317 ** If command resulted in either TASK_SET FULL,
3318 ** CHECK CONDITION or COMMAND TERMINATED,
3321 SCR_INT
^ IFTRUE (DATA (SAM_STAT_TASK_SET_FULL
)),
3323 SCR_INT
^ IFTRUE (DATA (SAM_STAT_CHECK_CONDITION
)),
3325 SCR_INT
^ IFTRUE (DATA (SAM_STAT_COMMAND_TERMINATED
)),
3329 }/*-------------------------< START_RAM >-------------------*/,{
3331 ** Load the script into on-chip RAM,
3332 ** and jump to start point.
3336 PADDRH (start_ram0
),
3338 ** Flush script prefetch if required
3341 SCR_COPY (sizeof (struct script
)),
3342 }/*-------------------------< START_RAM0 >--------------------*/,{
3347 }/*-------------------------< STO_RESTART >-------------------*/,{
3350 ** Repair start queue (e.g. next time use the next slot)
3351 ** and jump to start point.
3358 }/*-------------------------< WAIT_DMA >-------------------*/,{
3360 ** For HP Zalon/53c720 systems, the Zalon interface
3361 ** between CPU and 53c720 does prefetches, which causes
3362 ** problems with self modifying scripts. The problem
3363 ** is overcome by calling a dummy subroutine after each
3364 ** modification, to force a refetch of the script on
3365 ** return from the subroutine.
3369 }/*-------------------------< SNOOPTEST >-------------------*/,{
3371 ** Read the variable.
3377 ** Write the variable.
3383 ** Read back the variable.
3388 }/*-------------------------< SNOOPEND >-------------------*/,{
3394 }/*--------------------------------------------------------*/
3397 /*==========================================================
3400 ** Fill in #define dependent parts of the script
3403 **==========================================================
3406 void __init
ncr_script_fill (struct script
* scr
, struct scripth
* scrh
)
3412 for (i
=0; i
<MAX_START
; i
++) {
3417 BUG_ON((u_long
)p
!= (u_long
)&scrh
->tryloop
+ sizeof (scrh
->tryloop
));
3419 #ifdef SCSI_NCR_CCB_DONE_SUPPORT
3421 p
= scrh
->done_queue
;
3422 for (i
= 0; i
<MAX_DONE
; i
++) {
3423 *p
++ =SCR_COPY (sizeof(struct ccb
*));
3424 *p
++ =NADDR (header
.cp
);
3425 *p
++ =NADDR (ccb_done
[i
]);
3427 *p
++ =PADDR (done_end
);
3430 BUG_ON((u_long
)p
!= (u_long
)&scrh
->done_queue
+sizeof(scrh
->done_queue
));
3432 #endif /* SCSI_NCR_CCB_DONE_SUPPORT */
3435 for (i
=0; i
<MAX_SCATTERH
; i
++) {
3436 *p
++ =SCR_CALL
^ IFFALSE (WHEN (SCR_DATA_IN
));
3437 *p
++ =PADDR (dispatch
);
3438 *p
++ =SCR_MOVE_TBL
^ SCR_DATA_IN
;
3439 *p
++ =offsetof (struct dsb
, data
[i
]);
3442 BUG_ON((u_long
)p
!= (u_long
)&scrh
->hdata_in
+ sizeof (scrh
->hdata_in
));
3445 for (i
=MAX_SCATTERH
; i
<MAX_SCATTERH
+MAX_SCATTERL
; i
++) {
3446 *p
++ =SCR_CALL
^ IFFALSE (WHEN (SCR_DATA_IN
));
3447 *p
++ =PADDR (dispatch
);
3448 *p
++ =SCR_MOVE_TBL
^ SCR_DATA_IN
;
3449 *p
++ =offsetof (struct dsb
, data
[i
]);
3452 BUG_ON((u_long
)p
!= (u_long
)&scr
->data_in
+ sizeof (scr
->data_in
));
3454 p
= scrh
->hdata_out
;
3455 for (i
=0; i
<MAX_SCATTERH
; i
++) {
3456 *p
++ =SCR_CALL
^ IFFALSE (WHEN (SCR_DATA_OUT
));
3457 *p
++ =PADDR (dispatch
);
3458 *p
++ =SCR_MOVE_TBL
^ SCR_DATA_OUT
;
3459 *p
++ =offsetof (struct dsb
, data
[i
]);
3462 BUG_ON((u_long
)p
!= (u_long
)&scrh
->hdata_out
+ sizeof (scrh
->hdata_out
));
3465 for (i
=MAX_SCATTERH
; i
<MAX_SCATTERH
+MAX_SCATTERL
; i
++) {
3466 *p
++ =SCR_CALL
^ IFFALSE (WHEN (SCR_DATA_OUT
));
3467 *p
++ =PADDR (dispatch
);
3468 *p
++ =SCR_MOVE_TBL
^ SCR_DATA_OUT
;
3469 *p
++ =offsetof (struct dsb
, data
[i
]);
3472 BUG_ON((u_long
) p
!= (u_long
)&scr
->data_out
+ sizeof (scr
->data_out
));
3475 /*==========================================================
3478 ** Copy and rebind a script.
3481 **==========================================================
3485 ncr_script_copy_and_bind (struct ncb
*np
, ncrcmd
*src
, ncrcmd
*dst
, int len
)
3487 ncrcmd opcode
, new, old
, tmp1
, tmp2
;
3488 ncrcmd
*start
, *end
;
3498 *dst
++ = cpu_to_scr(opcode
);
3501 ** If we forget to change the length
3502 ** in struct script, a field will be
3503 ** padded with 0. This is an illegal
3508 printk (KERN_ERR
"%s: ERROR0 IN SCRIPT at %d.\n",
3509 ncr_name(np
), (int) (src
-start
-1));
3513 if (DEBUG_FLAGS
& DEBUG_SCRIPT
)
3514 printk (KERN_DEBUG
"%p: <%x>\n",
3515 (src
-1), (unsigned)opcode
);
3518 ** We don't have to decode ALL commands
3520 switch (opcode
>> 28) {
3524 ** COPY has TWO arguments.
3529 if ((tmp1
& RELOC_MASK
) == RELOC_KVAR
)
3534 if ((tmp2
& RELOC_MASK
) == RELOC_KVAR
)
3537 if ((tmp1
^ tmp2
) & 3) {
3538 printk (KERN_ERR
"%s: ERROR1 IN SCRIPT at %d.\n",
3539 ncr_name(np
), (int) (src
-start
-1));
3543 ** If PREFETCH feature not enabled, remove
3544 ** the NO FLUSH bit if present.
3546 if ((opcode
& SCR_NO_FLUSH
) && !(np
->features
& FE_PFEN
)) {
3547 dst
[-1] = cpu_to_scr(opcode
& ~SCR_NO_FLUSH
);
3554 ** MOVE (absolute address)
3562 ** don't relocate if relative :-)
3564 if (opcode
& 0x00800000)
3586 switch (old
& RELOC_MASK
) {
3587 case RELOC_REGISTER
:
3588 new = (old
& ~RELOC_MASK
) + np
->paddr
;
3591 new = (old
& ~RELOC_MASK
) + np
->p_script
;
3594 new = (old
& ~RELOC_MASK
) + np
->p_scripth
;
3597 new = (old
& ~RELOC_MASK
) + np
->p_ncb
;
3601 if (((old
& ~RELOC_MASK
) <
3602 SCRIPT_KVAR_FIRST
) ||
3603 ((old
& ~RELOC_MASK
) >
3605 panic("ncr KVAR out of range");
3606 new = vtophys(script_kvars
[old
&
3611 /* Don't relocate a 0 address. */
3618 panic("ncr_script_copy_and_bind: weird relocation %x\n", old
);
3622 *dst
++ = cpu_to_scr(new);
3625 *dst
++ = cpu_to_scr(*src
++);
3631 ** Linux host data structure
3638 #define PRINT_ADDR(cmd, arg...) dev_info(&cmd->device->sdev_gendev , ## arg)
3640 static void ncr_print_msg(struct ccb
*cp
, char *label
, u_char
*msg
)
3642 PRINT_ADDR(cp
->cmd
, "%s: ", label
);
3648 /*==========================================================
3650 ** NCR chip clock divisor table.
3651 ** Divisors are multiplied by 10,000,000 in order to make
3652 ** calculations more simple.
3654 **==========================================================
3658 static u_long div_10M
[] =
3659 {2*_5M
, 3*_5M
, 4*_5M
, 6*_5M
, 8*_5M
, 12*_5M
, 16*_5M
};
3662 /*===============================================================
3664 ** Prepare io register values used by ncr_init() according
3665 ** to selected and supported features.
3667 ** NCR chips allow burst lengths of 2, 4, 8, 16, 32, 64, 128
3668 ** transfers. 32,64,128 are only supported by 875 and 895 chips.
3669 ** We use log base 2 (burst length) as internal code, with
3670 ** value 0 meaning "burst disabled".
3672 **===============================================================
3676 * Burst length from burst code.
3678 #define burst_length(bc) (!(bc))? 0 : 1 << (bc)
3681 * Burst code from io register bits. Burst enable is ctest0 for c720
3683 #define burst_code(dmode, ctest0) \
3684 (ctest0) & 0x80 ? 0 : (((dmode) & 0xc0) >> 6) + 1
3687 * Set initial io register bits from burst code.
3689 static inline void ncr_init_burst(struct ncb
*np
, u_char bc
)
3691 u_char
*be
= &np
->rv_ctest0
;
3693 np
->rv_dmode
&= ~(0x3 << 6);
3694 np
->rv_ctest5
&= ~0x4;
3700 np
->rv_dmode
|= ((bc
& 0x3) << 6);
3701 np
->rv_ctest5
|= (bc
& 0x4);
3705 static void __init
ncr_prepare_setting(struct ncb
*np
)
3712 ** Save assumed BIOS setting
3715 np
->sv_scntl0
= INB(nc_scntl0
) & 0x0a;
3716 np
->sv_scntl3
= INB(nc_scntl3
) & 0x07;
3717 np
->sv_dmode
= INB(nc_dmode
) & 0xce;
3718 np
->sv_dcntl
= INB(nc_dcntl
) & 0xa8;
3719 np
->sv_ctest0
= INB(nc_ctest0
) & 0x84;
3720 np
->sv_ctest3
= INB(nc_ctest3
) & 0x01;
3721 np
->sv_ctest4
= INB(nc_ctest4
) & 0x80;
3722 np
->sv_ctest5
= INB(nc_ctest5
) & 0x24;
3723 np
->sv_gpcntl
= INB(nc_gpcntl
);
3724 np
->sv_stest2
= INB(nc_stest2
) & 0x20;
3725 np
->sv_stest4
= INB(nc_stest4
);
3731 np
->maxwide
= (np
->features
& FE_WIDE
)? 1 : 0;
3734 * Guess the frequency of the chip's clock.
3736 if (np
->features
& FE_ULTRA
)
3737 np
->clock_khz
= 80000;
3739 np
->clock_khz
= 40000;
3742 * Get the clock multiplier factor.
3744 if (np
->features
& FE_QUAD
)
3746 else if (np
->features
& FE_DBLR
)
3752 * Measure SCSI clock frequency for chips
3753 * it may vary from assumed one.
3755 if (np
->features
& FE_VARCLK
)
3756 ncr_getclock(np
, np
->multiplier
);
3759 * Divisor to be used for async (timer pre-scaler).
3761 i
= np
->clock_divn
- 1;
3763 if (10ul * SCSI_NCR_MIN_ASYNC
* np
->clock_khz
> div_10M
[i
]) {
3768 np
->rv_scntl3
= i
+1;
3771 * Minimum synchronous period factor supported by the chip.
3772 * Btw, 'period' is in tenths of nanoseconds.
3775 period
= (4 * div_10M
[0] + np
->clock_khz
- 1) / np
->clock_khz
;
3776 if (period
<= 250) np
->minsync
= 10;
3777 else if (period
<= 303) np
->minsync
= 11;
3778 else if (period
<= 500) np
->minsync
= 12;
3779 else np
->minsync
= (period
+ 40 - 1) / 40;
3782 * Check against chip SCSI standard support (SCSI-2,ULTRA,ULTRA2).
3785 if (np
->minsync
< 25 && !(np
->features
& FE_ULTRA
))
3789 * Maximum synchronous period factor supported by the chip.
3792 period
= (11 * div_10M
[np
->clock_divn
- 1]) / (4 * np
->clock_khz
);
3793 np
->maxsync
= period
> 2540 ? 254 : period
/ 10;
3796 ** Prepare initial value of other IO registers
3798 #if defined SCSI_NCR_TRUST_BIOS_SETTING
3799 np
->rv_scntl0
= np
->sv_scntl0
;
3800 np
->rv_dmode
= np
->sv_dmode
;
3801 np
->rv_dcntl
= np
->sv_dcntl
;
3802 np
->rv_ctest0
= np
->sv_ctest0
;
3803 np
->rv_ctest3
= np
->sv_ctest3
;
3804 np
->rv_ctest4
= np
->sv_ctest4
;
3805 np
->rv_ctest5
= np
->sv_ctest5
;
3806 burst_max
= burst_code(np
->sv_dmode
, np
->sv_ctest0
);
3810 ** Select burst length (dwords)
3812 burst_max
= driver_setup
.burst_max
;
3813 if (burst_max
== 255)
3814 burst_max
= burst_code(np
->sv_dmode
, np
->sv_ctest0
);
3817 if (burst_max
> np
->maxburst
)
3818 burst_max
= np
->maxburst
;
3821 ** Select all supported special features
3823 if (np
->features
& FE_ERL
)
3824 np
->rv_dmode
|= ERL
; /* Enable Read Line */
3825 if (np
->features
& FE_BOF
)
3826 np
->rv_dmode
|= BOF
; /* Burst Opcode Fetch */
3827 if (np
->features
& FE_ERMP
)
3828 np
->rv_dmode
|= ERMP
; /* Enable Read Multiple */
3829 if (np
->features
& FE_PFEN
)
3830 np
->rv_dcntl
|= PFEN
; /* Prefetch Enable */
3831 if (np
->features
& FE_CLSE
)
3832 np
->rv_dcntl
|= CLSE
; /* Cache Line Size Enable */
3833 if (np
->features
& FE_WRIE
)
3834 np
->rv_ctest3
|= WRIE
; /* Write and Invalidate */
3835 if (np
->features
& FE_DFS
)
3836 np
->rv_ctest5
|= DFS
; /* Dma Fifo Size */
3837 if (np
->features
& FE_MUX
)
3838 np
->rv_ctest4
|= MUX
; /* Host bus multiplex mode */
3839 if (np
->features
& FE_EA
)
3840 np
->rv_dcntl
|= EA
; /* Enable ACK */
3841 if (np
->features
& FE_EHP
)
3842 np
->rv_ctest0
|= EHP
; /* Even host parity */
3845 ** Select some other
3847 if (driver_setup
.master_parity
)
3848 np
->rv_ctest4
|= MPEE
; /* Master parity checking */
3849 if (driver_setup
.scsi_parity
)
3850 np
->rv_scntl0
|= 0x0a; /* full arb., ena parity, par->ATN */
3853 ** Get SCSI addr of host adapter (set by bios?).
3855 if (np
->myaddr
== 255) {
3856 np
->myaddr
= INB(nc_scid
) & 0x07;
3858 np
->myaddr
= SCSI_NCR_MYADDR
;
3861 #endif /* SCSI_NCR_TRUST_BIOS_SETTING */
3864 * Prepare initial io register bits for burst length
3866 ncr_init_burst(np
, burst_max
);
3869 ** Set SCSI BUS mode.
3871 ** - ULTRA2 chips (895/895A/896) report the current
3872 ** BUS mode through the STEST4 IO register.
3873 ** - For previous generation chips (825/825A/875),
3874 ** user has to tell us how to check against HVD,
3875 ** since a 100% safe algorithm is not possible.
3877 np
->scsi_mode
= SMODE_SE
;
3878 if (np
->features
& FE_DIFF
) {
3879 switch(driver_setup
.diff_support
) {
3880 case 4: /* Trust previous settings if present, then GPIO3 */
3881 if (np
->sv_scntl3
) {
3882 if (np
->sv_stest2
& 0x20)
3883 np
->scsi_mode
= SMODE_HVD
;
3887 case 3: /* SYMBIOS controllers report HVD through GPIO3 */
3888 if (INB(nc_gpreg
) & 0x08)
3891 case 2: /* Set HVD unconditionally */
3892 np
->scsi_mode
= SMODE_HVD
;
3894 case 1: /* Trust previous settings for HVD */
3895 if (np
->sv_stest2
& 0x20)
3896 np
->scsi_mode
= SMODE_HVD
;
3898 default:/* Don't care about HVD */
3902 if (np
->scsi_mode
== SMODE_HVD
)
3903 np
->rv_stest2
|= 0x20;
3906 ** Set LED support from SCRIPTS.
3907 ** Ignore this feature for boards known to use a
3908 ** specific GPIO wiring and for the 895A or 896
3909 ** that drive the LED directly.
3910 ** Also probe initial setting of GPIO0 as output.
3912 if ((driver_setup
.led_pin
) &&
3913 !(np
->features
& FE_LEDC
) && !(np
->sv_gpcntl
& 0x01))
3914 np
->features
|= FE_LED0
;
3919 switch(driver_setup
.irqm
& 3) {
3921 np
->rv_dcntl
|= IRQM
;
3924 np
->rv_dcntl
|= (np
->sv_dcntl
& IRQM
);
3931 ** Configure targets according to driver setup.
3932 ** Allow to override sync, wide and NOSCAN from
3933 ** boot command line.
3935 for (i
= 0 ; i
< MAX_TARGET
; i
++) {
3936 struct tcb
*tp
= &np
->target
[i
];
3938 tp
->usrsync
= driver_setup
.default_sync
;
3939 tp
->usrwide
= driver_setup
.max_wide
;
3940 tp
->usrtags
= MAX_TAGS
;
3941 tp
->period
= 0xffff;
3942 if (!driver_setup
.disconnection
)
3943 np
->target
[i
].usrflag
= UF_NODISC
;
3947 ** Announce all that stuff to user.
3950 printk(KERN_INFO
"%s: ID %d, Fast-%d%s%s\n", ncr_name(np
),
3952 np
->minsync
< 12 ? 40 : (np
->minsync
< 25 ? 20 : 10),
3953 (np
->rv_scntl0
& 0xa) ? ", Parity Checking" : ", NO Parity",
3954 (np
->rv_stest2
& 0x20) ? ", Differential" : "");
3956 if (bootverbose
> 1) {
3957 printk (KERN_INFO
"%s: initial SCNTL3/DMODE/DCNTL/CTEST3/4/5 = "
3958 "(hex) %02x/%02x/%02x/%02x/%02x/%02x\n",
3959 ncr_name(np
), np
->sv_scntl3
, np
->sv_dmode
, np
->sv_dcntl
,
3960 np
->sv_ctest3
, np
->sv_ctest4
, np
->sv_ctest5
);
3962 printk (KERN_INFO
"%s: final SCNTL3/DMODE/DCNTL/CTEST3/4/5 = "
3963 "(hex) %02x/%02x/%02x/%02x/%02x/%02x\n",
3964 ncr_name(np
), np
->rv_scntl3
, np
->rv_dmode
, np
->rv_dcntl
,
3965 np
->rv_ctest3
, np
->rv_ctest4
, np
->rv_ctest5
);
3968 if (bootverbose
&& np
->paddr2
)
3969 printk (KERN_INFO
"%s: on-chip RAM at 0x%lx\n",
3970 ncr_name(np
), np
->paddr2
);
3973 /*==========================================================
3976 ** Done SCSI commands list management.
3978 ** We donnot enter the scsi_done() callback immediately
3979 ** after a command has been seen as completed but we
3980 ** insert it into a list which is flushed outside any kind
3981 ** of driver critical section.
3982 ** This allows to do minimal stuff under interrupt and
3983 ** inside critical sections and to also avoid locking up
3984 ** on recursive calls to driver entry points under SMP.
3985 ** In fact, the only kernel point which is entered by the
3986 ** driver with a driver lock set is kmalloc(GFP_ATOMIC)
3987 ** that shall not reenter the driver under any circumstances,
3990 **==========================================================
3992 static inline void ncr_queue_done_cmd(struct ncb
*np
, struct scsi_cmnd
*cmd
)
3994 unmap_scsi_data(np
, cmd
);
3995 cmd
->host_scribble
= (char *) np
->done_list
;
3996 np
->done_list
= cmd
;
3999 static inline void ncr_flush_done_cmds(struct scsi_cmnd
*lcmd
)
4001 struct scsi_cmnd
*cmd
;
4005 lcmd
= (struct scsi_cmnd
*) cmd
->host_scribble
;
4006 cmd
->scsi_done(cmd
);
4010 /*==========================================================
4013 ** Prepare the next negotiation message if needed.
4015 ** Fill in the part of message buffer that contains the
4016 ** negotiation and the nego_status field of the CCB.
4017 ** Returns the size of the message in bytes.
4020 **==========================================================
4024 static int ncr_prepare_nego(struct ncb
*np
, struct ccb
*cp
, u_char
*msgptr
)
4026 struct tcb
*tp
= &np
->target
[cp
->target
];
4029 struct scsi_target
*starget
= tp
->starget
;
4031 /* negotiate wide transfers ? */
4032 if (!tp
->widedone
) {
4033 if (spi_support_wide(starget
)) {
4039 /* negotiate synchronous transfers? */
4040 if (!nego
&& !tp
->period
) {
4041 if (spi_support_sync(starget
)) {
4045 dev_info(&starget
->dev
, "target did not report SYNC.\n");
4051 msglen
+= spi_populate_sync_msg(msgptr
+ msglen
,
4052 tp
->maxoffs
? tp
->minsync
: 0, tp
->maxoffs
);
4055 msglen
+= spi_populate_width_msg(msgptr
+ msglen
, tp
->usrwide
);
4059 cp
->nego_status
= nego
;
4063 if (DEBUG_FLAGS
& DEBUG_NEGO
) {
4064 ncr_print_msg(cp
, nego
== NS_WIDE
?
4065 "wide msgout":"sync_msgout", msgptr
);
4074 /*==========================================================
4077 ** Start execution of a SCSI command.
4078 ** This is called from the generic SCSI driver.
4081 **==========================================================
4083 static int ncr_queue_command (struct ncb
*np
, struct scsi_cmnd
*cmd
)
4085 struct scsi_device
*sdev
= cmd
->device
;
4086 struct tcb
*tp
= &np
->target
[sdev
->id
];
4087 struct lcb
*lp
= tp
->lp
[sdev
->lun
];
4091 u_char idmsg
, *msgptr
;
4096 /*---------------------------------------------
4098 ** Some shortcuts ...
4100 **---------------------------------------------
4102 if ((sdev
->id
== np
->myaddr
) ||
4103 (sdev
->id
>= MAX_TARGET
) ||
4104 (sdev
->lun
>= MAX_LUN
)) {
4105 return(DID_BAD_TARGET
);
4108 /*---------------------------------------------
4110 ** Complete the 1st TEST UNIT READY command
4111 ** with error condition if the device is
4112 ** flagged NOSCAN, in order to speed up
4115 **---------------------------------------------
4117 if ((cmd
->cmnd
[0] == 0 || cmd
->cmnd
[0] == 0x12) &&
4118 (tp
->usrflag
& UF_NOSCAN
)) {
4119 tp
->usrflag
&= ~UF_NOSCAN
;
4120 return DID_BAD_TARGET
;
4123 if (DEBUG_FLAGS
& DEBUG_TINY
) {
4124 PRINT_ADDR(cmd
, "CMD=%x ", cmd
->cmnd
[0]);
4127 /*---------------------------------------------------
4129 ** Assign a ccb / bind cmd.
4130 ** If resetting, shorten settle_time if necessary
4131 ** in order to avoid spurious timeouts.
4132 ** If resetting or no free ccb,
4133 ** insert cmd into the waiting list.
4135 **----------------------------------------------------
4137 if (np
->settle_time
&& scsi_cmd_to_rq(cmd
)->timeout
>= HZ
) {
4138 u_long tlimit
= jiffies
+ scsi_cmd_to_rq(cmd
)->timeout
- HZ
;
4139 if (time_after(np
->settle_time
, tlimit
))
4140 np
->settle_time
= tlimit
;
4143 if (np
->settle_time
|| !(cp
=ncr_get_ccb (np
, cmd
))) {
4144 insert_into_waiting_list(np
, cmd
);
4149 /*----------------------------------------------------
4151 ** Build the identify / tag / sdtr message
4153 **----------------------------------------------------
4156 idmsg
= IDENTIFY(0, sdev
->lun
);
4158 if (cp
->tag
!= NO_TAG
||
4159 (cp
!= np
->ccb
&& np
->disc
&& !(tp
->usrflag
& UF_NODISC
)))
4162 msgptr
= cp
->scsi_smsg
;
4164 msgptr
[msglen
++] = idmsg
;
4166 if (cp
->tag
!= NO_TAG
) {
4167 char order
= np
->order
;
4170 ** Force ordered tag if necessary to avoid timeouts
4171 ** and to preserve interactivity.
4173 if (lp
&& time_after(jiffies
, lp
->tags_stime
)) {
4174 if (lp
->tags_smap
) {
4175 order
= ORDERED_QUEUE_TAG
;
4176 if ((DEBUG_FLAGS
& DEBUG_TAGS
)||bootverbose
>2){
4178 "ordered tag forced.\n");
4181 lp
->tags_stime
= jiffies
+ 3*HZ
;
4182 lp
->tags_smap
= lp
->tags_umap
;
4187 ** Ordered write ops, unordered read ops.
4189 switch (cmd
->cmnd
[0]) {
4190 case 0x08: /* READ_SMALL (6) */
4191 case 0x28: /* READ_BIG (10) */
4192 case 0xa8: /* READ_HUGE (12) */
4193 order
= SIMPLE_QUEUE_TAG
;
4196 order
= ORDERED_QUEUE_TAG
;
4199 msgptr
[msglen
++] = order
;
4201 ** Actual tags are numbered 1,3,5,..2*MAXTAGS+1,
4202 ** since we may have to deal with devices that have
4203 ** problems with #TAG 0 or too great #TAG numbers.
4205 msgptr
[msglen
++] = (cp
->tag
<< 1) + 1;
4208 /*----------------------------------------------------
4210 ** Build the data descriptors
4212 **----------------------------------------------------
4215 direction
= cmd
->sc_data_direction
;
4216 if (direction
!= DMA_NONE
) {
4217 segments
= ncr_scatter(np
, cp
, cp
->cmd
);
4219 ncr_free_ccb(np
, cp
);
4228 /*---------------------------------------------------
4230 ** negotiation required?
4232 ** (nego_status is filled by ncr_prepare_nego())
4234 **---------------------------------------------------
4237 cp
->nego_status
= 0;
4239 if ((!tp
->widedone
|| !tp
->period
) && !tp
->nego_cp
&& lp
) {
4240 msglen
+= ncr_prepare_nego (np
, cp
, msgptr
+ msglen
);
4243 /*----------------------------------------------------
4245 ** Determine xfer direction.
4247 **----------------------------------------------------
4250 direction
= DMA_NONE
;
4253 ** If data direction is BIDIRECTIONAL, speculate FROM_DEVICE
4254 ** but prepare alternate pointers for TO_DEVICE in case
4255 ** of our speculation will be just wrong.
4256 ** SCRIPTS will swap values if needed.
4259 case DMA_BIDIRECTIONAL
:
4261 goalp
= NCB_SCRIPT_PHYS (np
, data_out2
) + 8;
4262 if (segments
<= MAX_SCATTERL
)
4263 lastp
= goalp
- 8 - (segments
* 16);
4265 lastp
= NCB_SCRIPTH_PHYS (np
, hdata_out2
);
4266 lastp
-= (segments
- MAX_SCATTERL
) * 16;
4268 if (direction
!= DMA_BIDIRECTIONAL
)
4270 cp
->phys
.header
.wgoalp
= cpu_to_scr(goalp
);
4271 cp
->phys
.header
.wlastp
= cpu_to_scr(lastp
);
4273 case DMA_FROM_DEVICE
:
4274 goalp
= NCB_SCRIPT_PHYS (np
, data_in2
) + 8;
4275 if (segments
<= MAX_SCATTERL
)
4276 lastp
= goalp
- 8 - (segments
* 16);
4278 lastp
= NCB_SCRIPTH_PHYS (np
, hdata_in2
);
4279 lastp
-= (segments
- MAX_SCATTERL
) * 16;
4284 lastp
= goalp
= NCB_SCRIPT_PHYS (np
, no_data
);
4289 ** Set all pointers values needed by SCRIPTS.
4290 ** If direction is unknown, start at data_io.
4292 cp
->phys
.header
.lastp
= cpu_to_scr(lastp
);
4293 cp
->phys
.header
.goalp
= cpu_to_scr(goalp
);
4295 if (direction
== DMA_BIDIRECTIONAL
)
4296 cp
->phys
.header
.savep
=
4297 cpu_to_scr(NCB_SCRIPTH_PHYS (np
, data_io
));
4299 cp
->phys
.header
.savep
= cpu_to_scr(lastp
);
4302 ** Save the initial data pointer in order to be able
4303 ** to redo the command.
4305 cp
->startp
= cp
->phys
.header
.savep
;
4307 /*----------------------------------------------------
4311 **----------------------------------------------------
4314 ** physical -> virtual backlink
4315 ** Generic SCSI command
4321 cp
->start
.schedule
.l_paddr
= cpu_to_scr(NCB_SCRIPT_PHYS (np
, select
));
4322 cp
->restart
.schedule
.l_paddr
= cpu_to_scr(NCB_SCRIPT_PHYS (np
, resel_dsa
));
4326 cp
->phys
.select
.sel_id
= sdev_id(sdev
);
4327 cp
->phys
.select
.sel_scntl3
= tp
->wval
;
4328 cp
->phys
.select
.sel_sxfer
= tp
->sval
;
4332 cp
->phys
.smsg
.addr
= cpu_to_scr(CCB_PHYS (cp
, scsi_smsg
));
4333 cp
->phys
.smsg
.size
= cpu_to_scr(msglen
);
4338 memcpy(cp
->cdb_buf
, cmd
->cmnd
, min_t(int, cmd
->cmd_len
, sizeof(cp
->cdb_buf
)));
4339 cp
->phys
.cmd
.addr
= cpu_to_scr(CCB_PHYS (cp
, cdb_buf
[0]));
4340 cp
->phys
.cmd
.size
= cpu_to_scr(cmd
->cmd_len
);
4345 cp
->actualquirks
= 0;
4346 cp
->host_status
= cp
->nego_status
? HS_NEGOTIATE
: HS_BUSY
;
4347 cp
->scsi_status
= SAM_STAT_ILLEGAL
;
4348 cp
->parity_status
= 0;
4350 cp
->xerr_status
= XE_OK
;
4352 /*----------------------------------------------------
4354 ** Critical region: start this job.
4356 **----------------------------------------------------
4359 /* activate this job. */
4360 cp
->magic
= CCB_MAGIC
;
4363 ** insert next CCBs into start queue.
4364 ** 2 max at a time is enough to flush the CCB wait queue.
4368 ncr_start_next_ccb(np
, lp
, 2);
4370 ncr_put_start_queue(np
, cp
);
4372 /* Command is successfully queued. */
4378 /*==========================================================
4381 ** Insert a CCB into the start queue and wake up the
4382 ** SCRIPTS processor.
4385 **==========================================================
4388 static void ncr_start_next_ccb(struct ncb
*np
, struct lcb
*lp
, int maxn
)
4390 struct list_head
*qp
;
4396 while (maxn
-- && lp
->queuedccbs
< lp
->queuedepth
) {
4397 qp
= ncr_list_pop(&lp
->wait_ccbq
);
4401 cp
= list_entry(qp
, struct ccb
, link_ccbq
);
4402 list_add_tail(qp
, &lp
->busy_ccbq
);
4403 lp
->jump_ccb
[cp
->tag
== NO_TAG
? 0 : cp
->tag
] =
4404 cpu_to_scr(CCB_PHYS (cp
, restart
));
4405 ncr_put_start_queue(np
, cp
);
4409 static void ncr_put_start_queue(struct ncb
*np
, struct ccb
*cp
)
4414 ** insert into start queue.
4416 if (!np
->squeueput
) np
->squeueput
= 1;
4417 qidx
= np
->squeueput
+ 2;
4418 if (qidx
>= MAX_START
+ MAX_START
) qidx
= 1;
4420 np
->scripth
->tryloop
[qidx
] = cpu_to_scr(NCB_SCRIPT_PHYS (np
, idle
));
4422 np
->scripth
->tryloop
[np
->squeueput
] = cpu_to_scr(CCB_PHYS (cp
, start
));
4424 np
->squeueput
= qidx
;
4428 if (DEBUG_FLAGS
& DEBUG_QUEUE
)
4429 printk ("%s: queuepos=%d.\n", ncr_name (np
), np
->squeueput
);
4432 ** Script processor may be waiting for reselect.
4436 OUTB (nc_istat
, SIGP
);
4440 static int ncr_reset_scsi_bus(struct ncb
*np
, int enab_int
, int settle_delay
)
4445 np
->settle_time
= jiffies
+ settle_delay
* HZ
;
4447 if (bootverbose
> 1)
4448 printk("%s: resetting, "
4449 "command processing suspended for %d seconds\n",
4450 ncr_name(np
), settle_delay
);
4452 ncr_chip_reset(np
, 100);
4453 udelay(2000); /* The 895 needs time for the bus mode to settle */
4455 OUTW (nc_sien
, RST
);
4457 ** Enable Tolerant, reset IRQD if present and
4458 ** properly set IRQ mode, prior to resetting the bus.
4460 OUTB (nc_stest3
, TE
);
4461 OUTB (nc_scntl1
, CRST
);
4464 if (!driver_setup
.bus_check
)
4467 ** Check for no terminators or SCSI bus shorts to ground.
4468 ** Read SCSI data bus, data parity bits and control signals.
4469 ** We are expecting RESET to be TRUE and other signals to be
4473 term
= INB(nc_sstat0
);
4474 term
= ((term
& 2) << 7) + ((term
& 1) << 17); /* rst sdp0 */
4475 term
|= ((INB(nc_sstat2
) & 0x01) << 26) | /* sdp1 */
4476 ((INW(nc_sbdl
) & 0xff) << 9) | /* d7-0 */
4477 ((INW(nc_sbdl
) & 0xff00) << 10) | /* d15-8 */
4478 INB(nc_sbcl
); /* req ack bsy sel atn msg cd io */
4480 if (!(np
->features
& FE_WIDE
))
4483 if (term
!= (2<<7)) {
4484 printk("%s: suspicious SCSI data while resetting the BUS.\n",
4486 printk("%s: %sdp0,d7-0,rst,req,ack,bsy,sel,atn,msg,c/d,i/o = "
4487 "0x%lx, expecting 0x%lx\n",
4489 (np
->features
& FE_WIDE
) ? "dp1,d15-8," : "",
4490 (u_long
)term
, (u_long
)(2<<7));
4491 if (driver_setup
.bus_check
== 1)
4495 OUTB (nc_scntl1
, 0);
4500 * Start reset process.
4501 * If reset in progress do nothing.
4502 * The interrupt handler will reinitialize the chip.
4503 * The timeout handler will wait for settle_time before
4504 * clearing it and so resuming command processing.
4506 static void ncr_start_reset(struct ncb
*np
)
4508 if (!np
->settle_time
) {
4509 ncr_reset_scsi_bus(np
, 1, driver_setup
.settle_delay
);
4513 /*==========================================================
4516 ** Reset the SCSI BUS.
4517 ** This is called from the generic SCSI driver.
4520 **==========================================================
4522 static int ncr_reset_bus (struct ncb
*np
)
4525 * Return immediately if reset is in progress.
4527 if (np
->settle_time
) {
4531 * Start the reset process.
4532 * The script processor is then assumed to be stopped.
4533 * Commands will now be queued in the waiting list until a settle
4534 * delay of 2 seconds will be completed.
4536 ncr_start_reset(np
);
4538 * Wake-up all awaiting commands with DID_RESET.
4540 reset_waiting_list(np
);
4542 * Wake-up all pending commands with HS_RESET -> DID_RESET.
4544 ncr_wakeup(np
, HS_RESET
);
4549 static void ncr_detach(struct ncb
*np
)
4558 /* Local copy so we don't access np after freeing it! */
4559 strlcpy(inst_name
, ncr_name(np
), sizeof(inst_name
));
4561 printk("%s: releasing host resources\n", ncr_name(np
));
4564 ** Stop the ncr_timeout process
4565 ** Set release_stage to 1 and wait that ncr_timeout() set it to 2.
4568 #ifdef DEBUG_NCR53C8XX
4569 printk("%s: stopping the timer\n", ncr_name(np
));
4571 np
->release_stage
= 1;
4572 for (i
= 50 ; i
&& np
->release_stage
!= 2 ; i
--)
4574 if (np
->release_stage
!= 2)
4575 printk("%s: the timer seems to be already stopped\n", ncr_name(np
));
4576 else np
->release_stage
= 2;
4579 ** Disable chip interrupts
4582 #ifdef DEBUG_NCR53C8XX
4583 printk("%s: disabling chip interrupts\n", ncr_name(np
));
4590 ** Restore bios setting for automatic clock detection.
4593 printk("%s: resetting chip\n", ncr_name(np
));
4594 ncr_chip_reset(np
, 100);
4596 OUTB(nc_dmode
, np
->sv_dmode
);
4597 OUTB(nc_dcntl
, np
->sv_dcntl
);
4598 OUTB(nc_ctest0
, np
->sv_ctest0
);
4599 OUTB(nc_ctest3
, np
->sv_ctest3
);
4600 OUTB(nc_ctest4
, np
->sv_ctest4
);
4601 OUTB(nc_ctest5
, np
->sv_ctest5
);
4602 OUTB(nc_gpcntl
, np
->sv_gpcntl
);
4603 OUTB(nc_stest2
, np
->sv_stest2
);
4605 ncr_selectclock(np
, np
->sv_scntl3
);
4608 ** Free allocated ccb(s)
4611 while ((cp
=np
->ccb
->link_ccb
) != NULL
) {
4612 np
->ccb
->link_ccb
= cp
->link_ccb
;
4613 if (cp
->host_status
) {
4614 printk("%s: shall free an active ccb (host_status=%d)\n",
4615 ncr_name(np
), cp
->host_status
);
4617 #ifdef DEBUG_NCR53C8XX
4618 printk("%s: freeing ccb (%lx)\n", ncr_name(np
), (u_long
) cp
);
4620 m_free_dma(cp
, sizeof(*cp
), "CCB");
4623 /* Free allocated tp(s) */
4625 for (target
= 0; target
< MAX_TARGET
; target
++) {
4626 tp
=&np
->target
[target
];
4627 for (lun
= 0 ; lun
< MAX_LUN
; lun
++) {
4630 #ifdef DEBUG_NCR53C8XX
4631 printk("%s: freeing lp (%lx)\n", ncr_name(np
), (u_long
) lp
);
4633 if (lp
->jump_ccb
!= &lp
->jump_ccb_0
)
4634 m_free_dma(lp
->jump_ccb
,256,"JUMP_CCB");
4635 m_free_dma(lp
, sizeof(*lp
), "LCB");
4641 m_free_dma(np
->scripth0
, sizeof(struct scripth
), "SCRIPTH");
4643 m_free_dma(np
->script0
, sizeof(struct script
), "SCRIPT");
4645 m_free_dma(np
->ccb
, sizeof(struct ccb
), "CCB");
4646 m_free_dma(np
, sizeof(struct ncb
), "NCB");
4648 printk("%s: host resources successfully released\n", inst_name
);
4651 /*==========================================================
4654 ** Complete execution of a SCSI command.
4655 ** Signal completion to the generic SCSI driver.
4658 **==========================================================
4661 void ncr_complete (struct ncb
*np
, struct ccb
*cp
)
4663 struct scsi_cmnd
*cmd
;
4671 if (!cp
|| cp
->magic
!= CCB_MAGIC
|| !cp
->cmd
)
4675 ** Print minimal debug information.
4678 if (DEBUG_FLAGS
& DEBUG_TINY
)
4679 printk ("CCB=%lx STAT=%x/%x\n", (unsigned long)cp
,
4680 cp
->host_status
,cp
->scsi_status
);
4683 ** Get command, target and lun pointers.
4688 tp
= &np
->target
[cmd
->device
->id
];
4689 lp
= tp
->lp
[cmd
->device
->lun
];
4692 ** We donnot queue more than 1 ccb per target
4693 ** with negotiation at any time. If this ccb was
4694 ** used for negotiation, clear this info in the tcb.
4697 if (cp
== tp
->nego_cp
)
4701 ** If auto-sense performed, change scsi status.
4703 if (cp
->auto_sense
) {
4704 cp
->scsi_status
= cp
->auto_sense
;
4708 ** If we were recovering from queue full or performing
4709 ** auto-sense, requeue skipped CCBs to the wait queue.
4712 if (lp
&& lp
->held_ccb
) {
4713 if (cp
== lp
->held_ccb
) {
4714 list_splice_init(&lp
->skip_ccbq
, &lp
->wait_ccbq
);
4715 lp
->held_ccb
= NULL
;
4720 ** Check for parity errors.
4723 if (cp
->parity_status
> 1) {
4724 PRINT_ADDR(cmd
, "%d parity error(s).\n",cp
->parity_status
);
4728 ** Check for extended errors.
4731 if (cp
->xerr_status
!= XE_OK
) {
4732 switch (cp
->xerr_status
) {
4734 PRINT_ADDR(cmd
, "extraneous data discarded.\n");
4737 PRINT_ADDR(cmd
, "invalid scsi phase (4/5).\n");
4740 PRINT_ADDR(cmd
, "extended error %d.\n",
4744 if (cp
->host_status
==HS_COMPLETE
)
4745 cp
->host_status
= HS_FAIL
;
4749 ** Print out any error for debugging purpose.
4751 if (DEBUG_FLAGS
& (DEBUG_RESULT
|DEBUG_TINY
)) {
4752 if (cp
->host_status
!= HS_COMPLETE
||
4753 cp
->scsi_status
!= SAM_STAT_GOOD
) {
4754 PRINT_ADDR(cmd
, "ERROR: cmd=%x host_status=%x "
4755 "scsi_status=%x\n", cmd
->cmnd
[0],
4756 cp
->host_status
, cp
->scsi_status
);
4761 ** Check the status.
4764 if ( (cp
->host_status
== HS_COMPLETE
)
4765 && (cp
->scsi_status
== SAM_STAT_GOOD
||
4766 cp
->scsi_status
== SAM_STAT_CONDITION_MET
)) {
4768 * All went well (GOOD status).
4769 * CONDITION MET status is returned on
4770 * `Pre-Fetch' or `Search data' success.
4772 set_status_byte(cmd
, cp
->scsi_status
);
4776 ** Could dig out the correct value for resid,
4777 ** but it would be quite complicated.
4779 /* if (cp->phys.header.lastp != cp->phys.header.goalp) */
4782 ** Allocate the lcb if not yet.
4785 ncr_alloc_lcb (np
, cmd
->device
->id
, cmd
->device
->lun
);
4787 tp
->bytes
+= cp
->data_len
;
4791 ** If tags was reduced due to queue full,
4792 ** increase tags if 1000 good status received.
4794 if (lp
&& lp
->usetags
&& lp
->numtags
< lp
->maxtags
) {
4796 if (lp
->num_good
>= 1000) {
4799 ncr_setup_tags (np
, cmd
->device
);
4802 } else if ((cp
->host_status
== HS_COMPLETE
)
4803 && (cp
->scsi_status
== SAM_STAT_CHECK_CONDITION
)) {
4805 ** Check condition code
4807 set_status_byte(cmd
, SAM_STAT_CHECK_CONDITION
);
4810 ** Copy back sense data to caller's buffer.
4812 memcpy(cmd
->sense_buffer
, cp
->sense_buf
,
4813 min_t(size_t, SCSI_SENSE_BUFFERSIZE
,
4814 sizeof(cp
->sense_buf
)));
4816 if (DEBUG_FLAGS
& (DEBUG_RESULT
|DEBUG_TINY
)) {
4817 u_char
*p
= cmd
->sense_buffer
;
4819 PRINT_ADDR(cmd
, "sense data:");
4820 for (i
=0; i
<14; i
++) printk (" %x", *p
++);
4823 } else if ((cp
->host_status
== HS_COMPLETE
)
4824 && (cp
->scsi_status
== SAM_STAT_RESERVATION_CONFLICT
)) {
4826 ** Reservation Conflict condition code
4828 set_status_byte(cmd
, SAM_STAT_RESERVATION_CONFLICT
);
4830 } else if ((cp
->host_status
== HS_COMPLETE
)
4831 && (cp
->scsi_status
== SAM_STAT_BUSY
||
4832 cp
->scsi_status
== SAM_STAT_TASK_SET_FULL
)) {
4837 set_status_byte(cmd
, cp
->scsi_status
);
4839 } else if ((cp
->host_status
== HS_SEL_TIMEOUT
)
4840 || (cp
->host_status
== HS_TIMEOUT
)) {
4845 set_status_byte(cmd
, cp
->scsi_status
);
4846 set_host_byte(cmd
, DID_TIME_OUT
);
4848 } else if (cp
->host_status
== HS_RESET
) {
4853 set_status_byte(cmd
, cp
->scsi_status
);
4854 set_host_byte(cmd
, DID_RESET
);
4856 } else if (cp
->host_status
== HS_ABORTED
) {
4861 set_status_byte(cmd
, cp
->scsi_status
);
4862 set_host_byte(cmd
, DID_ABORT
);
4867 ** Other protocol messes
4869 PRINT_ADDR(cmd
, "COMMAND FAILED (%x %x) @%p.\n",
4870 cp
->host_status
, cp
->scsi_status
, cp
);
4872 set_status_byte(cmd
, cp
->scsi_status
);
4873 set_host_byte(cmd
, DID_ERROR
);
4880 if (tp
->usrflag
& UF_TRACE
) {
4883 PRINT_ADDR(cmd
, " CMD:");
4884 p
= (u_char
*) &cmd
->cmnd
[0];
4885 for (i
=0; i
<cmd
->cmd_len
; i
++) printk (" %x", *p
++);
4887 if (cp
->host_status
==HS_COMPLETE
) {
4888 switch (cp
->scsi_status
) {
4892 case SAM_STAT_CHECK_CONDITION
:
4894 p
= (u_char
*) &cmd
->sense_buffer
;
4895 for (i
=0; i
<14; i
++)
4896 printk (" %x", *p
++);
4899 printk (" STAT: %x\n", cp
->scsi_status
);
4902 } else printk (" HOSTERROR: %x", cp
->host_status
);
4909 ncr_free_ccb (np
, cp
);
4912 ** requeue awaiting scsi commands for this lun.
4914 if (lp
&& lp
->queuedccbs
< lp
->queuedepth
&&
4915 !list_empty(&lp
->wait_ccbq
))
4916 ncr_start_next_ccb(np
, lp
, 2);
4919 ** requeue awaiting scsi commands for this controller.
4921 if (np
->waiting_list
)
4922 requeue_waiting_list(np
);
4925 ** signal completion to generic driver.
4927 ncr_queue_done_cmd(np
, cmd
);
4930 /*==========================================================
4933 ** Signal all (or one) control block done.
4936 **==========================================================
4940 ** This CCB has been skipped by the NCR.
4941 ** Queue it in the corresponding unit queue.
4943 static void ncr_ccb_skipped(struct ncb
*np
, struct ccb
*cp
)
4945 struct tcb
*tp
= &np
->target
[cp
->target
];
4946 struct lcb
*lp
= tp
->lp
[cp
->lun
];
4948 if (lp
&& cp
!= np
->ccb
) {
4949 cp
->host_status
&= ~HS_SKIPMASK
;
4950 cp
->start
.schedule
.l_paddr
=
4951 cpu_to_scr(NCB_SCRIPT_PHYS (np
, select
));
4952 list_move_tail(&cp
->link_ccbq
, &lp
->skip_ccbq
);
4964 ** The NCR has completed CCBs.
4965 ** Look at the DONE QUEUE if enabled, otherwise scan all CCBs
4967 void ncr_wakeup_done (struct ncb
*np
)
4970 #ifdef SCSI_NCR_CCB_DONE_SUPPORT
4973 i
= np
->ccb_done_ic
;
4979 cp
= np
->ccb_done
[j
];
4980 if (!CCB_DONE_VALID(cp
))
4983 np
->ccb_done
[j
] = (struct ccb
*)CCB_DONE_EMPTY
;
4984 np
->scripth
->done_queue
[5*j
+ 4] =
4985 cpu_to_scr(NCB_SCRIPT_PHYS (np
, done_plug
));
4987 np
->scripth
->done_queue
[5*i
+ 4] =
4988 cpu_to_scr(NCB_SCRIPT_PHYS (np
, done_end
));
4990 if (cp
->host_status
& HS_DONEMASK
)
4991 ncr_complete (np
, cp
);
4992 else if (cp
->host_status
& HS_SKIPMASK
)
4993 ncr_ccb_skipped (np
, cp
);
4997 np
->ccb_done_ic
= i
;
5001 if (cp
->host_status
& HS_DONEMASK
)
5002 ncr_complete (np
, cp
);
5003 else if (cp
->host_status
& HS_SKIPMASK
)
5004 ncr_ccb_skipped (np
, cp
);
5011 ** Complete all active CCBs.
5013 void ncr_wakeup (struct ncb
*np
, u_long code
)
5015 struct ccb
*cp
= np
->ccb
;
5018 if (cp
->host_status
!= HS_IDLE
) {
5019 cp
->host_status
= code
;
5020 ncr_complete (np
, cp
);
5030 /* Some initialisation must be done immediately following reset, for 53c720,
5031 * at least. EA (dcntl bit 5) isn't set here as it is set once only in
5032 * the _detect function.
5034 static void ncr_chip_reset(struct ncb
*np
, int delay
)
5036 OUTB (nc_istat
, SRST
);
5038 OUTB (nc_istat
, 0 );
5040 if (np
->features
& FE_EHP
)
5041 OUTB (nc_ctest0
, EHP
);
5042 if (np
->features
& FE_MUX
)
5043 OUTB (nc_ctest4
, MUX
);
5047 /*==========================================================
5053 **==========================================================
5056 void ncr_init (struct ncb
*np
, int reset
, char * msg
, u_long code
)
5061 ** Reset chip if asked, otherwise just clear fifos.
5065 OUTB (nc_istat
, SRST
);
5069 OUTB (nc_stest3
, TE
|CSF
);
5070 OUTONB (nc_ctest3
, CLF
);
5077 if (msg
) printk (KERN_INFO
"%s: restart (%s).\n", ncr_name (np
), msg
);
5080 ** Clear Start Queue
5082 np
->queuedepth
= MAX_START
- 1; /* 1 entry needed as end marker */
5083 for (i
= 1; i
< MAX_START
+ MAX_START
; i
+= 2)
5084 np
->scripth0
->tryloop
[i
] =
5085 cpu_to_scr(NCB_SCRIPT_PHYS (np
, idle
));
5088 ** Start at first entry.
5091 np
->script0
->startpos
[0] = cpu_to_scr(NCB_SCRIPTH_PHYS (np
, tryloop
));
5093 #ifdef SCSI_NCR_CCB_DONE_SUPPORT
5097 for (i
= 0; i
< MAX_DONE
; i
++) {
5098 np
->ccb_done
[i
] = (struct ccb
*)CCB_DONE_EMPTY
;
5099 np
->scripth0
->done_queue
[5*i
+ 4] =
5100 cpu_to_scr(NCB_SCRIPT_PHYS (np
, done_end
));
5105 ** Start at first entry.
5107 np
->script0
->done_pos
[0] = cpu_to_scr(NCB_SCRIPTH_PHYS (np
,done_queue
));
5108 np
->ccb_done_ic
= MAX_DONE
-1;
5109 np
->scripth0
->done_queue
[5*(MAX_DONE
-1) + 4] =
5110 cpu_to_scr(NCB_SCRIPT_PHYS (np
, done_plug
));
5113 ** Wakeup all pending jobs.
5115 ncr_wakeup (np
, code
);
5122 ** Remove reset; big delay because the 895 needs time for the
5123 ** bus mode to settle
5125 ncr_chip_reset(np
, 2000);
5127 OUTB (nc_scntl0
, np
->rv_scntl0
| 0xc0);
5128 /* full arb., ena parity, par->ATN */
5129 OUTB (nc_scntl1
, 0x00); /* odd parity, and remove CRST!! */
5131 ncr_selectclock(np
, np
->rv_scntl3
); /* Select SCSI clock */
5133 OUTB (nc_scid
, RRE
|np
->myaddr
); /* Adapter SCSI address */
5134 OUTW (nc_respid
, 1ul<<np
->myaddr
); /* Id to respond to */
5135 OUTB (nc_istat
, SIGP
); /* Signal Process */
5136 OUTB (nc_dmode
, np
->rv_dmode
); /* Burst length, dma mode */
5137 OUTB (nc_ctest5
, np
->rv_ctest5
); /* Large fifo + large burst */
5139 OUTB (nc_dcntl
, NOCOM
|np
->rv_dcntl
); /* Protect SFBR */
5140 OUTB (nc_ctest0
, np
->rv_ctest0
); /* 720: CDIS and EHP */
5141 OUTB (nc_ctest3
, np
->rv_ctest3
); /* Write and invalidate */
5142 OUTB (nc_ctest4
, np
->rv_ctest4
); /* Master parity checking */
5144 OUTB (nc_stest2
, EXT
|np
->rv_stest2
); /* Extended Sreq/Sack filtering */
5145 OUTB (nc_stest3
, TE
); /* TolerANT enable */
5146 OUTB (nc_stime0
, 0x0c ); /* HTH disabled STO 0.25 sec */
5149 ** Disable disconnects.
5155 ** Enable GPIO0 pin for writing if LED support.
5158 if (np
->features
& FE_LED0
) {
5159 OUTOFFB (nc_gpcntl
, 0x01);
5166 OUTW (nc_sien
, STO
|HTH
|MA
|SGE
|UDC
|RST
|PAR
);
5167 OUTB (nc_dien
, MDPE
|BF
|ABRT
|SSI
|SIR
|IID
);
5170 ** Fill in target structure.
5171 ** Reinitialize usrsync.
5172 ** Reinitialize usrwide.
5173 ** Prepare sync negotiation according to actual SCSI bus mode.
5176 for (i
=0;i
<MAX_TARGET
;i
++) {
5177 struct tcb
*tp
= &np
->target
[i
];
5180 tp
->wval
= np
->rv_scntl3
;
5182 if (tp
->usrsync
!= 255) {
5183 if (tp
->usrsync
<= np
->maxsync
) {
5184 if (tp
->usrsync
< np
->minsync
) {
5185 tp
->usrsync
= np
->minsync
;
5192 if (tp
->usrwide
> np
->maxwide
)
5193 tp
->usrwide
= np
->maxwide
;
5198 ** Start script processor.
5202 printk ("%s: Downloading SCSI SCRIPTS.\n",
5204 OUTL (nc_scratcha
, vtobus(np
->script0
));
5205 OUTL_DSP (NCB_SCRIPTH_PHYS (np
, start_ram
));
5208 OUTL_DSP (NCB_SCRIPT_PHYS (np
, start
));
5211 /*==========================================================
5213 ** Prepare the negotiation values for wide and
5214 ** synchronous transfers.
5216 **==========================================================
5219 static void ncr_negotiate (struct ncb
* np
, struct tcb
* tp
)
5222 ** minsync unit is 4ns !
5225 u_long minsync
= tp
->usrsync
;
5228 ** SCSI bus mode limit
5231 if (np
->scsi_mode
&& np
->scsi_mode
== SMODE_SE
) {
5232 if (minsync
< 12) minsync
= 12;
5239 if (minsync
< np
->minsync
)
5240 minsync
= np
->minsync
;
5246 if (minsync
> np
->maxsync
)
5249 if (tp
->maxoffs
> np
->maxoffs
)
5250 tp
->maxoffs
= np
->maxoffs
;
5252 tp
->minsync
= minsync
;
5253 tp
->maxoffs
= (minsync
<255 ? tp
->maxoffs
: 0);
5256 ** period=0: has to negotiate sync transfer
5262 ** widedone=0: has to negotiate wide transfer
5267 /*==========================================================
5269 ** Get clock factor and sync divisor for a given
5270 ** synchronous factor period.
5271 ** Returns the clock factor (in sxfer) and scntl3
5272 ** synchronous divisor field.
5274 **==========================================================
5277 static void ncr_getsync(struct ncb
*np
, u_char sfac
, u_char
*fakp
, u_char
*scntl3p
)
5279 u_long clk
= np
->clock_khz
; /* SCSI clock frequency in kHz */
5280 int div
= np
->clock_divn
; /* Number of divisors supported */
5281 u_long fak
; /* Sync factor in sxfer */
5282 u_long per
; /* Period in tenths of ns */
5283 u_long kpc
; /* (per * clk) */
5286 ** Compute the synchronous period in tenths of nano-seconds
5288 if (sfac
<= 10) per
= 250;
5289 else if (sfac
== 11) per
= 303;
5290 else if (sfac
== 12) per
= 500;
5291 else per
= 40 * sfac
;
5294 ** Look for the greatest clock divisor that allows an
5295 ** input speed faster than the period.
5299 if (kpc
>= (div_10M
[div
] << 2)) break;
5302 ** Calculate the lowest clock factor that allows an output
5303 ** speed not faster than the period.
5305 fak
= (kpc
- 1) / div_10M
[div
] + 1;
5307 if (fak
< 4) fak
= 4; /* Should never happen, too bad ... */
5310 ** Compute and return sync parameters for the ncr
5313 *scntl3p
= ((div
+1) << 4) + (sfac
< 25 ? 0x80 : 0);
5317 /*==========================================================
5319 ** Set actual values, sync status and patch all ccbs of
5320 ** a target according to new sync/wide agreement.
5322 **==========================================================
5325 static void ncr_set_sync_wide_status (struct ncb
*np
, u_char target
)
5328 struct tcb
*tp
= &np
->target
[target
];
5331 ** set actual value and sync_status
5333 OUTB (nc_sxfer
, tp
->sval
);
5334 np
->sync_st
= tp
->sval
;
5335 OUTB (nc_scntl3
, tp
->wval
);
5336 np
->wide_st
= tp
->wval
;
5339 ** patch ALL ccbs of this target.
5341 for (cp
= np
->ccb
; cp
; cp
= cp
->link_ccb
) {
5342 if (!cp
->cmd
) continue;
5343 if (scmd_id(cp
->cmd
) != target
) continue;
5344 cp
->phys
.select
.sel_scntl3
= tp
->wval
;
5345 cp
->phys
.select
.sel_sxfer
= tp
->sval
;
5349 /*==========================================================
5351 ** Switch sync mode for current job and it's target
5353 **==========================================================
5356 static void ncr_setsync (struct ncb
*np
, struct ccb
*cp
, u_char scntl3
, u_char sxfer
)
5358 struct scsi_cmnd
*cmd
= cp
->cmd
;
5360 u_char target
= INB (nc_sdid
) & 0x0f;
5363 BUG_ON(target
!= (scmd_id(cmd
) & 0xf));
5365 tp
= &np
->target
[target
];
5367 if (!scntl3
|| !(sxfer
& 0x1f))
5368 scntl3
= np
->rv_scntl3
;
5369 scntl3
= (scntl3
& 0xf0) | (tp
->wval
& EWS
) | (np
->rv_scntl3
& 0x07);
5372 ** Deduce the value of controller sync period from scntl3.
5373 ** period is in tenths of nano-seconds.
5376 idiv
= ((scntl3
>> 4) & 0x7);
5377 if ((sxfer
& 0x1f) && idiv
)
5378 tp
->period
= (((sxfer
>>5)+4)*div_10M
[idiv
-1])/np
->clock_khz
;
5380 tp
->period
= 0xffff;
5382 /* Stop there if sync parameters are unchanged */
5383 if (tp
->sval
== sxfer
&& tp
->wval
== scntl3
)
5388 if (sxfer
& 0x01f) {
5389 /* Disable extended Sreq/Sack filtering */
5390 if (tp
->period
<= 2000)
5391 OUTOFFB(nc_stest2
, EXT
);
5394 spi_display_xfer_agreement(tp
->starget
);
5397 ** set actual value and sync_status
5398 ** patch ALL ccbs of this target.
5400 ncr_set_sync_wide_status(np
, target
);
5403 /*==========================================================
5405 ** Switch wide mode for current job and it's target
5406 ** SCSI specs say: a SCSI device that accepts a WDTR
5407 ** message shall reset the synchronous agreement to
5408 ** asynchronous mode.
5410 **==========================================================
5413 static void ncr_setwide (struct ncb
*np
, struct ccb
*cp
, u_char wide
, u_char ack
)
5415 struct scsi_cmnd
*cmd
= cp
->cmd
;
5416 u16 target
= INB (nc_sdid
) & 0x0f;
5421 BUG_ON(target
!= (scmd_id(cmd
) & 0xf));
5423 tp
= &np
->target
[target
];
5424 tp
->widedone
= wide
+1;
5425 scntl3
= (tp
->wval
& (~EWS
)) | (wide
? EWS
: 0);
5427 sxfer
= ack
? 0 : tp
->sval
;
5430 ** Stop there if sync/wide parameters are unchanged
5432 if (tp
->sval
== sxfer
&& tp
->wval
== scntl3
) return;
5437 ** Bells and whistles ;-)
5439 if (bootverbose
>= 2) {
5440 dev_info(&cmd
->device
->sdev_target
->dev
, "WIDE SCSI %sabled.\n",
5441 (scntl3
& EWS
) ? "en" : "dis");
5445 ** set actual value and sync_status
5446 ** patch ALL ccbs of this target.
5448 ncr_set_sync_wide_status(np
, target
);
5451 /*==========================================================
5453 ** Switch tagged mode for a target.
5455 **==========================================================
5458 static void ncr_setup_tags (struct ncb
*np
, struct scsi_device
*sdev
)
5460 unsigned char tn
= sdev
->id
, ln
= sdev
->lun
;
5461 struct tcb
*tp
= &np
->target
[tn
];
5462 struct lcb
*lp
= tp
->lp
[ln
];
5463 u_char reqtags
, maxdepth
;
5468 if ((!tp
) || (!lp
) || !sdev
)
5472 ** If SCSI device queue depth is not yet set, leave here.
5474 if (!lp
->scdev_depth
)
5478 ** Donnot allow more tags than the SCSI driver can queue
5480 ** Donnot allow more tags than we can handle.
5482 maxdepth
= lp
->scdev_depth
;
5483 if (maxdepth
> lp
->maxnxs
) maxdepth
= lp
->maxnxs
;
5484 if (lp
->maxtags
> maxdepth
) lp
->maxtags
= maxdepth
;
5485 if (lp
->numtags
> maxdepth
) lp
->numtags
= maxdepth
;
5488 ** only devices conformant to ANSI Version >= 2
5489 ** only devices capable of tagged commands
5490 ** only if enabled by user ..
5492 if (sdev
->tagged_supported
&& lp
->numtags
> 1) {
5493 reqtags
= lp
->numtags
;
5499 ** Update max number of tags
5501 lp
->numtags
= reqtags
;
5502 if (lp
->numtags
> lp
->maxtags
)
5503 lp
->maxtags
= lp
->numtags
;
5506 ** If we want to switch tag mode, we must wait
5507 ** for no CCB to be active.
5509 if (reqtags
> 1 && lp
->usetags
) { /* Stay in tagged mode */
5510 if (lp
->queuedepth
== reqtags
) /* Already announced */
5512 lp
->queuedepth
= reqtags
;
5514 else if (reqtags
<= 1 && !lp
->usetags
) { /* Stay in untagged mode */
5515 lp
->queuedepth
= reqtags
;
5518 else { /* Want to switch tag mode */
5519 if (lp
->busyccbs
) /* If not yet safe, return */
5521 lp
->queuedepth
= reqtags
;
5522 lp
->usetags
= reqtags
> 1 ? 1 : 0;
5526 ** Patch the lun mini-script, according to tag mode.
5528 lp
->jump_tag
.l_paddr
= lp
->usetags
?
5529 cpu_to_scr(NCB_SCRIPT_PHYS(np
, resel_tag
)) :
5530 cpu_to_scr(NCB_SCRIPT_PHYS(np
, resel_notag
));
5533 ** Announce change to user.
5537 dev_info(&sdev
->sdev_gendev
,
5538 "tagged command queue depth set to %d\n",
5541 dev_info(&sdev
->sdev_gendev
,
5542 "tagged command queueing disabled\n");
5547 /*==========================================================
5550 ** ncr timeout handler.
5553 **==========================================================
5555 ** Misused to keep the driver running when
5556 ** interrupts are not configured correctly.
5558 **----------------------------------------------------------
5561 static void ncr_timeout (struct ncb
*np
)
5563 u_long thistime
= jiffies
;
5566 ** If release process in progress, let's go
5567 ** Set the release stage from 1 to 2 to synchronize
5568 ** with the release process.
5571 if (np
->release_stage
) {
5572 if (np
->release_stage
== 1) np
->release_stage
= 2;
5576 np
->timer
.expires
= jiffies
+ SCSI_NCR_TIMER_INTERVAL
;
5577 add_timer(&np
->timer
);
5580 ** If we are resetting the ncr, wait for settle_time before
5581 ** clearing it. Then command processing will be resumed.
5583 if (np
->settle_time
) {
5584 if (np
->settle_time
<= thistime
) {
5585 if (bootverbose
> 1)
5586 printk("%s: command processing resumed\n", ncr_name(np
));
5587 np
->settle_time
= 0;
5589 requeue_waiting_list(np
);
5595 ** Since the generic scsi driver only allows us 0.5 second
5596 ** to perform abort of a command, we must look at ccbs about
5597 ** every 0.25 second.
5599 if (np
->lasttime
+ 4*HZ
< thistime
) {
5601 ** block ncr interrupts
5603 np
->lasttime
= thistime
;
5606 #ifdef SCSI_NCR_BROKEN_INTR
5607 if (INB(nc_istat
) & (INTF
|SIP
|DIP
)) {
5610 ** Process pending interrupts.
5612 if (DEBUG_FLAGS
& DEBUG_TINY
) printk ("{");
5614 if (DEBUG_FLAGS
& DEBUG_TINY
) printk ("}");
5616 #endif /* SCSI_NCR_BROKEN_INTR */
5619 /*==========================================================
5621 ** log message for real hard errors
5623 ** "ncr0 targ 0?: ERROR (ds:si) (so-si-sd) (sxfer/scntl3) @ name (dsp:dbc)."
5624 ** " reg: r0 r1 r2 r3 r4 r5 r6 ..... rf."
5626 ** exception register:
5631 ** so: control lines as driver by NCR.
5632 ** si: control lines as seen by NCR.
5633 ** sd: scsi data lines as seen by NCR.
5636 ** sxfer: (see the manual)
5637 ** scntl3: (see the manual)
5639 ** current script command:
5640 ** dsp: script address (relative to start of script).
5641 ** dbc: first word of script command.
5643 ** First 16 register of the chip:
5646 **==========================================================
5649 static void ncr_log_hard_error(struct ncb
*np
, u16 sist
, u_char dstat
)
5655 u_char
*script_base
;
5660 if (dsp
> np
->p_script
&& dsp
<= np
->p_script
+ sizeof(struct script
)) {
5661 script_ofs
= dsp
- np
->p_script
;
5662 script_size
= sizeof(struct script
);
5663 script_base
= (u_char
*) np
->script0
;
5664 script_name
= "script";
5666 else if (np
->p_scripth
< dsp
&&
5667 dsp
<= np
->p_scripth
+ sizeof(struct scripth
)) {
5668 script_ofs
= dsp
- np
->p_scripth
;
5669 script_size
= sizeof(struct scripth
);
5670 script_base
= (u_char
*) np
->scripth0
;
5671 script_name
= "scripth";
5676 script_name
= "mem";
5679 printk ("%s:%d: ERROR (%x:%x) (%x-%x-%x) (%x/%x) @ (%s %x:%08x).\n",
5680 ncr_name (np
), (unsigned)INB (nc_sdid
)&0x0f, dstat
, sist
,
5681 (unsigned)INB (nc_socl
), (unsigned)INB (nc_sbcl
), (unsigned)INB (nc_sbdl
),
5682 (unsigned)INB (nc_sxfer
),(unsigned)INB (nc_scntl3
), script_name
, script_ofs
,
5683 (unsigned)INL (nc_dbc
));
5685 if (((script_ofs
& 3) == 0) &&
5686 (unsigned)script_ofs
< script_size
) {
5687 printk ("%s: script cmd = %08x\n", ncr_name(np
),
5688 scr_to_cpu((int) *(ncrcmd
*)(script_base
+ script_ofs
)));
5691 printk ("%s: regdump:", ncr_name(np
));
5693 printk (" %02x", (unsigned)INB_OFF(i
));
5697 /*============================================================
5699 ** ncr chip exception handler.
5701 **============================================================
5703 ** In normal cases, interrupt conditions occur one at a
5704 ** time. The ncr is able to stack in some extra registers
5705 ** other interrupts that will occur after the first one.
5706 ** But, several interrupts may occur at the same time.
5708 ** We probably should only try to deal with the normal
5709 ** case, but it seems that multiple interrupts occur in
5710 ** some cases that are not abnormal at all.
5712 ** The most frequent interrupt condition is Phase Mismatch.
5713 ** We should want to service this interrupt quickly.
5714 ** A SCSI parity error may be delivered at the same time.
5715 ** The SIR interrupt is not very frequent in this driver,
5716 ** since the INTFLY is likely used for command completion
5718 ** The Selection Timeout interrupt may be triggered with
5720 ** The SBMC interrupt (SCSI Bus Mode Change) may probably
5721 ** occur at any time.
5723 ** This handler try to deal as cleverly as possible with all
5726 **============================================================
5729 void ncr_exception (struct ncb
*np
)
5731 u_char istat
, dstat
;
5736 ** interrupt on the fly ?
5737 ** Since the global header may be copied back to a CCB
5738 ** using a posted PCI memory write, the last operation on
5739 ** the istat register is a READ in order to flush posted
5740 ** PCI write commands.
5742 istat
= INB (nc_istat
);
5744 OUTB (nc_istat
, (istat
& SIGP
) | INTF
);
5745 istat
= INB (nc_istat
);
5746 if (DEBUG_FLAGS
& DEBUG_TINY
) printk ("F ");
5747 ncr_wakeup_done (np
);
5750 if (!(istat
& (SIP
|DIP
)))
5754 OUTB (nc_istat
, CABRT
);
5757 ** Steinbach's Guideline for Systems Programming:
5758 ** Never test for an error condition you don't know how to handle.
5761 sist
= (istat
& SIP
) ? INW (nc_sist
) : 0;
5762 dstat
= (istat
& DIP
) ? INB (nc_dstat
) : 0;
5764 if (DEBUG_FLAGS
& DEBUG_TINY
)
5765 printk ("<%d|%x:%x|%x:%x>",
5768 (unsigned)INL(nc_dsp
),
5769 (unsigned)INL(nc_dbc
));
5771 /*========================================================
5772 ** First, interrupts we want to service cleanly.
5774 ** Phase mismatch is the most frequent interrupt, and
5775 ** so we have to service it as quickly and as cleanly
5777 ** Programmed interrupts are rarely used in this driver,
5778 ** but we must handle them cleanly anyway.
5779 ** We try to deal with PAR and SBMC combined with
5780 ** some other interrupt(s).
5781 **=========================================================
5784 if (!(sist
& (STO
|GEN
|HTH
|SGE
|UDC
|RST
)) &&
5785 !(dstat
& (MDPE
|BF
|ABRT
|IID
))) {
5786 if ((sist
& SBMC
) && ncr_int_sbmc (np
))
5788 if ((sist
& PAR
) && ncr_int_par (np
))
5799 ** DEL 397 - 53C875 Rev 3 - Part Number 609-0392410 - ITEM 2.
5801 if (!(sist
& (SBMC
|PAR
)) && !(dstat
& SSI
)) {
5802 printk( "%s: unknown interrupt(s) ignored, "
5803 "ISTAT=%x DSTAT=%x SIST=%x\n",
5804 ncr_name(np
), istat
, dstat
, sist
);
5811 /*========================================================
5812 ** Now, interrupts that need some fixing up.
5813 ** Order and multiple interrupts is so less important.
5815 ** If SRST has been asserted, we just reset the chip.
5817 ** Selection is intirely handled by the chip. If the
5818 ** chip says STO, we trust it. Seems some other
5819 ** interrupts may occur at the same time (UDC, IID), so
5820 ** we ignore them. In any case we do enough fix-up
5821 ** in the service routine.
5822 ** We just exclude some fatal dma errors.
5823 **=========================================================
5827 ncr_init (np
, 1, bootverbose
? "scsi reset" : NULL
, HS_RESET
);
5832 !(dstat
& (MDPE
|BF
|ABRT
))) {
5834 ** DEL 397 - 53C875 Rev 3 - Part Number 609-0392410 - ITEM 1.
5836 OUTONB (nc_ctest3
, CLF
);
5842 /*=========================================================
5843 ** Now, interrupts we are not able to recover cleanly.
5844 ** (At least for the moment).
5846 ** Do the register dump.
5847 ** Log message for real hard errors.
5849 ** For MDPE, BF, ABORT, IID, SGE and HTH we reset the
5850 ** BUS and the chip.
5851 ** We are more soft for UDC.
5852 **=========================================================
5855 if (time_after(jiffies
, np
->regtime
)) {
5856 np
->regtime
= jiffies
+ 10*HZ
;
5857 for (i
= 0; i
<sizeof(np
->regdump
); i
++)
5858 ((char*)&np
->regdump
)[i
] = INB_OFF(i
);
5859 np
->regdump
.nc_dstat
= dstat
;
5860 np
->regdump
.nc_sist
= sist
;
5863 ncr_log_hard_error(np
, sist
, dstat
);
5865 printk ("%s: have to clear fifos.\n", ncr_name (np
));
5866 OUTB (nc_stest3
, TE
|CSF
);
5867 OUTONB (nc_ctest3
, CLF
);
5869 if ((sist
& (SGE
)) ||
5870 (dstat
& (MDPE
|BF
|ABRT
|IID
))) {
5871 ncr_start_reset(np
);
5876 printk ("%s: handshake timeout\n", ncr_name(np
));
5877 ncr_start_reset(np
);
5882 printk ("%s: unexpected disconnect\n", ncr_name(np
));
5883 OUTB (HS_PRT
, HS_UNEXPECTED
);
5884 OUTL_DSP (NCB_SCRIPT_PHYS (np
, cleanup
));
5888 /*=========================================================
5889 ** We just miss the cause of the interrupt. :(
5890 ** Print a message. The timeout will do the real work.
5891 **=========================================================
5893 printk ("%s: unknown interrupt\n", ncr_name(np
));
5896 /*==========================================================
5898 ** ncr chip exception handler for selection timeout
5900 **==========================================================
5902 ** There seems to be a bug in the 53c810.
5903 ** Although a STO-Interrupt is pending,
5904 ** it continues executing script commands.
5905 ** But it will fail and interrupt (IID) on
5906 ** the next instruction where it's looking
5907 ** for a valid phase.
5909 **----------------------------------------------------------
5912 void ncr_int_sto (struct ncb
*np
)
5916 if (DEBUG_FLAGS
& DEBUG_TINY
) printk ("T");
5919 ** look for ccb and set the status.
5924 while (cp
&& (CCB_PHYS (cp
, phys
) != dsa
))
5928 cp
-> host_status
= HS_SEL_TIMEOUT
;
5929 ncr_complete (np
, cp
);
5933 ** repair start queue and jump to start point.
5936 OUTL_DSP (NCB_SCRIPTH_PHYS (np
, sto_restart
));
5940 /*==========================================================
5942 ** ncr chip exception handler for SCSI bus mode change
5944 **==========================================================
5946 ** spi2-r12 11.2.3 says a transceiver mode change must
5947 ** generate a reset event and a device that detects a reset
5948 ** event shall initiate a hard reset. It says also that a
5949 ** device that detects a mode change shall set data transfer
5950 ** mode to eight bit asynchronous, etc...
5951 ** So, just resetting should be enough.
5954 **----------------------------------------------------------
5957 static int ncr_int_sbmc (struct ncb
*np
)
5959 u_char scsi_mode
= INB (nc_stest4
) & SMODE
;
5961 if (scsi_mode
!= np
->scsi_mode
) {
5962 printk("%s: SCSI bus mode change from %x to %x.\n",
5963 ncr_name(np
), np
->scsi_mode
, scsi_mode
);
5965 np
->scsi_mode
= scsi_mode
;
5969 ** Suspend command processing for 1 second and
5970 ** reinitialize all except the chip.
5972 np
->settle_time
= jiffies
+ HZ
;
5973 ncr_init (np
, 0, bootverbose
? "scsi mode change" : NULL
, HS_RESET
);
5979 /*==========================================================
5981 ** ncr chip exception handler for SCSI parity error.
5983 **==========================================================
5986 **----------------------------------------------------------
5989 static int ncr_int_par (struct ncb
*np
)
5991 u_char hsts
= INB (HS_PRT
);
5992 u32 dbc
= INL (nc_dbc
);
5993 u_char sstat1
= INB (nc_sstat1
);
5998 printk("%s: SCSI parity error detected: SCR1=%d DBC=%x SSTAT1=%x\n",
5999 ncr_name(np
), hsts
, dbc
, sstat1
);
6002 * Ignore the interrupt if the NCR is not connected
6003 * to the SCSI bus, since the right work should have
6004 * been done on unexpected disconnection handling.
6006 if (!(INB (nc_scntl1
) & ISCON
))
6010 * If the nexus is not clearly identified, reset the bus.
6011 * We will try to do better later.
6013 if (hsts
& HS_INVALMASK
)
6017 * If the SCSI parity error occurs in MSG IN phase, prepare a
6018 * MSG PARITY message. Otherwise, prepare a INITIATOR DETECTED
6019 * ERROR message and let the device decide to retry the command
6020 * or to terminate with check condition. If we were in MSG IN
6021 * phase waiting for the response of a negotiation, we will
6022 * get SIR_NEGO_FAILED at dispatch.
6024 if (!(dbc
& 0xc0000000))
6025 phase
= (dbc
>> 24) & 7;
6027 msg
= MSG_PARITY_ERROR
;
6029 msg
= INITIATOR_ERROR
;
6033 * If the NCR stopped on a MOVE ^ DATA_IN, we jump to a
6034 * script that will ignore all data in bytes until phase
6035 * change, since we are not sure the chip will wait the phase
6036 * change prior to delivering the interrupt.
6039 jmp
= NCB_SCRIPTH_PHYS (np
, par_err_data_in
);
6041 jmp
= NCB_SCRIPTH_PHYS (np
, par_err_other
);
6043 OUTONB (nc_ctest3
, CLF
); /* clear dma fifo */
6044 OUTB (nc_stest3
, TE
|CSF
); /* clear scsi fifo */
6046 np
->msgout
[0] = msg
;
6051 ncr_start_reset(np
);
6055 /*==========================================================
6058 ** ncr chip exception handler for phase errors.
6061 **==========================================================
6063 ** We have to construct a new transfer descriptor,
6064 ** to transfer the rest of the current block.
6066 **----------------------------------------------------------
6069 static void ncr_int_ma (struct ncb
*np
)
6086 sbcl
= INB (nc_sbcl
);
6089 rest
= dbc
& 0xffffff;
6092 ** Take into account dma fifo and various buffers and latches,
6093 ** only if the interrupted phase is an OUTPUT phase.
6096 if ((cmd
& 1) == 0) {
6097 u_char ctest5
, ss0
, ss2
;
6100 ctest5
= (np
->rv_ctest5
& DFS
) ? INB (nc_ctest5
) : 0;
6102 delta
=(((ctest5
<< 8) | (INB (nc_dfifo
) & 0xff)) - rest
) & 0x3ff;
6104 delta
=(INB (nc_dfifo
) - rest
) & 0x7f;
6107 ** The data in the dma fifo has not been transferred to
6108 ** the target -> add the amount to the rest
6109 ** and clear the data.
6110 ** Check the sstat2 register in case of wide transfer.
6114 ss0
= INB (nc_sstat0
);
6115 if (ss0
& OLF
) rest
++;
6116 if (ss0
& ORF
) rest
++;
6117 if (INB(nc_scntl3
) & EWS
) {
6118 ss2
= INB (nc_sstat2
);
6119 if (ss2
& OLF1
) rest
++;
6120 if (ss2
& ORF1
) rest
++;
6123 if (DEBUG_FLAGS
& (DEBUG_TINY
|DEBUG_PHASE
))
6124 printk ("P%x%x RL=%d D=%d SS0=%x ", cmd
&7, sbcl
&7,
6125 (unsigned) rest
, (unsigned) delta
, ss0
);
6128 if (DEBUG_FLAGS
& (DEBUG_TINY
|DEBUG_PHASE
))
6129 printk ("P%x%x RL=%d ", cmd
&7, sbcl
&7, rest
);
6135 OUTONB (nc_ctest3
, CLF
); /* clear dma fifo */
6136 OUTB (nc_stest3
, TE
|CSF
); /* clear scsi fifo */
6139 ** locate matching cp.
6140 ** if the interrupted phase is DATA IN or DATA OUT,
6141 ** trust the global header.
6146 if (CCB_PHYS(cp
, phys
) != dsa
)
6150 while (cp
&& (CCB_PHYS (cp
, phys
) != dsa
))
6155 ** try to find the interrupted script command,
6156 ** and the address at which to continue.
6160 if (dsp
> np
->p_script
&&
6161 dsp
<= np
->p_script
+ sizeof(struct script
)) {
6162 vdsp
= (u32
*)((char*)np
->script0
+ (dsp
-np
->p_script
-8));
6165 else if (dsp
> np
->p_scripth
&&
6166 dsp
<= np
->p_scripth
+ sizeof(struct scripth
)) {
6167 vdsp
= (u32
*)((char*)np
->scripth0
+ (dsp
-np
->p_scripth
-8));
6171 if (dsp
== CCB_PHYS (cp
, patch
[2])) {
6172 vdsp
= &cp
->patch
[0];
6173 nxtdsp
= scr_to_cpu(vdsp
[3]);
6175 else if (dsp
== CCB_PHYS (cp
, patch
[6])) {
6176 vdsp
= &cp
->patch
[4];
6177 nxtdsp
= scr_to_cpu(vdsp
[3]);
6182 ** log the information
6185 if (DEBUG_FLAGS
& DEBUG_PHASE
) {
6186 printk ("\nCP=%p CP2=%p DSP=%x NXT=%x VDSP=%p CMD=%x ",
6189 (unsigned)nxtdsp
, vdsp
, cmd
);
6193 ** cp=0 means that the DSA does not point to a valid control
6194 ** block. This should not happen since we donnot use multi-byte
6195 ** move while we are being reselected ot after command complete.
6196 ** We are not able to recover from such a phase error.
6199 printk ("%s: SCSI phase error fixup: "
6200 "CCB already dequeued (0x%08lx)\n",
6201 ncr_name (np
), (u_long
) np
->header
.cp
);
6206 ** get old startaddress and old length.
6209 oadr
= scr_to_cpu(vdsp
[1]);
6211 if (cmd
& 0x10) { /* Table indirect */
6212 tblp
= (u32
*) ((char*) &cp
->phys
+ oadr
);
6213 olen
= scr_to_cpu(tblp
[0]);
6214 oadr
= scr_to_cpu(tblp
[1]);
6217 olen
= scr_to_cpu(vdsp
[0]) & 0xffffff;
6220 if (DEBUG_FLAGS
& DEBUG_PHASE
) {
6221 printk ("OCMD=%x\nTBLP=%p OLEN=%x OADR=%x\n",
6222 (unsigned) (scr_to_cpu(vdsp
[0]) >> 24),
6229 ** check cmd against assumed interrupted script command.
6232 if (cmd
!= (scr_to_cpu(vdsp
[0]) >> 24)) {
6233 PRINT_ADDR(cp
->cmd
, "internal error: cmd=%02x != %02x=(vdsp[0] "
6234 ">> 24)\n", cmd
, scr_to_cpu(vdsp
[0]) >> 24);
6240 ** cp != np->header.cp means that the header of the CCB
6241 ** currently being processed has not yet been copied to
6242 ** the global header area. That may happen if the device did
6243 ** not accept all our messages after having been selected.
6245 if (cp
!= np
->header
.cp
) {
6246 printk ("%s: SCSI phase error fixup: "
6247 "CCB address mismatch (0x%08lx != 0x%08lx)\n",
6248 ncr_name (np
), (u_long
) cp
, (u_long
) np
->header
.cp
);
6252 ** if old phase not dataphase, leave here.
6256 PRINT_ADDR(cp
->cmd
, "phase change %x-%x %d@%08x resid=%d.\n",
6257 cmd
&7, sbcl
&7, (unsigned)olen
,
6258 (unsigned)oadr
, (unsigned)rest
);
6259 goto unexpected_phase
;
6263 ** choose the correct patch area.
6264 ** if savep points to one, choose the other.
6268 newtmp
= CCB_PHYS (cp
, patch
);
6269 if (newtmp
== scr_to_cpu(cp
->phys
.header
.savep
)) {
6270 newcmd
= &cp
->patch
[4];
6271 newtmp
= CCB_PHYS (cp
, patch
[4]);
6275 ** fillin the commands
6278 newcmd
[0] = cpu_to_scr(((cmd
& 0x0f) << 24) | rest
);
6279 newcmd
[1] = cpu_to_scr(oadr
+ olen
- rest
);
6280 newcmd
[2] = cpu_to_scr(SCR_JUMP
);
6281 newcmd
[3] = cpu_to_scr(nxtdsp
);
6283 if (DEBUG_FLAGS
& DEBUG_PHASE
) {
6284 PRINT_ADDR(cp
->cmd
, "newcmd[%d] %x %x %x %x.\n",
6285 (int) (newcmd
- cp
->patch
),
6286 (unsigned)scr_to_cpu(newcmd
[0]),
6287 (unsigned)scr_to_cpu(newcmd
[1]),
6288 (unsigned)scr_to_cpu(newcmd
[2]),
6289 (unsigned)scr_to_cpu(newcmd
[3]));
6292 ** fake the return address (to the patch).
6293 ** and restart script processor at dispatcher.
6295 OUTL (nc_temp
, newtmp
);
6296 OUTL_DSP (NCB_SCRIPT_PHYS (np
, dispatch
));
6300 ** Unexpected phase changes that occurs when the current phase
6301 ** is not a DATA IN or DATA OUT phase are due to error conditions.
6302 ** Such event may only happen when the SCRIPTS is using a
6303 ** multibyte SCSI MOVE.
6305 ** Phase change Some possible cause
6307 ** COMMAND --> MSG IN SCSI parity error detected by target.
6308 ** COMMAND --> STATUS Bad command or refused by target.
6309 ** MSG OUT --> MSG IN Message rejected by target.
6310 ** MSG OUT --> COMMAND Bogus target that discards extended
6311 ** negotiation messages.
6313 ** The code below does not care of the new phase and so
6314 ** trusts the target. Why to annoy it ?
6315 ** If the interrupted phase is COMMAND phase, we restart at
6317 ** If a target does not get all the messages after selection,
6318 ** the code assumes blindly that the target discards extended
6319 ** messages and clears the negotiation status.
6320 ** If the target does not want all our response to negotiation,
6321 ** we force a SIR_NEGO_PROTO interrupt (it is a hack that avoids
6322 ** bloat for such a should_not_happen situation).
6323 ** In all other situation, we reset the BUS.
6324 ** Are these assumptions reasonable ? (Wait and see ...)
6331 case 2: /* COMMAND phase */
6332 nxtdsp
= NCB_SCRIPT_PHYS (np
, dispatch
);
6335 case 3: /* STATUS phase */
6336 nxtdsp
= NCB_SCRIPT_PHYS (np
, dispatch
);
6339 case 6: /* MSG OUT phase */
6340 np
->scripth
->nxtdsp_go_on
[0] = cpu_to_scr(dsp
+ 8);
6341 if (dsp
== NCB_SCRIPT_PHYS (np
, send_ident
)) {
6342 cp
->host_status
= HS_BUSY
;
6343 nxtdsp
= NCB_SCRIPTH_PHYS (np
, clratn_go_on
);
6345 else if (dsp
== NCB_SCRIPTH_PHYS (np
, send_wdtr
) ||
6346 dsp
== NCB_SCRIPTH_PHYS (np
, send_sdtr
)) {
6347 nxtdsp
= NCB_SCRIPTH_PHYS (np
, nego_bad_phase
);
6351 case 7: /* MSG IN phase */
6352 nxtdsp
= NCB_SCRIPT_PHYS (np
, clrack
);
6363 ncr_start_reset(np
);
6367 static void ncr_sir_to_redo(struct ncb
*np
, int num
, struct ccb
*cp
)
6369 struct scsi_cmnd
*cmd
= cp
->cmd
;
6370 struct tcb
*tp
= &np
->target
[cmd
->device
->id
];
6371 struct lcb
*lp
= tp
->lp
[cmd
->device
->lun
];
6372 struct list_head
*qp
;
6377 u_char s_status
= INB (SS_PRT
);
6380 ** Let the SCRIPTS processor skip all not yet started CCBs,
6381 ** and count disconnected CCBs. Since the busy queue is in
6382 ** the same order as the chip start queue, disconnected CCBs
6383 ** are before cp and busy ones after.
6386 qp
= lp
->busy_ccbq
.prev
;
6387 while (qp
!= &lp
->busy_ccbq
) {
6388 cp2
= list_entry(qp
, struct ccb
, link_ccbq
);
6393 cp2
->start
.schedule
.l_paddr
=
6394 cpu_to_scr(NCB_SCRIPTH_PHYS (np
, skip
));
6396 lp
->held_ccb
= cp
; /* Requeue when this one completes */
6397 disc_cnt
= lp
->queuedccbs
- busy_cnt
;
6401 default: /* Just for safety, should never happen */
6402 case SAM_STAT_TASK_SET_FULL
:
6404 ** Decrease number of tags to the number of
6405 ** disconnected commands.
6409 if (bootverbose
>= 1) {
6410 PRINT_ADDR(cmd
, "QUEUE FULL! %d busy, %d disconnected "
6411 "CCBs\n", busy_cnt
, disc_cnt
);
6413 if (disc_cnt
< lp
->numtags
) {
6414 lp
->numtags
= disc_cnt
> 2 ? disc_cnt
: 2;
6416 ncr_setup_tags (np
, cmd
->device
);
6419 ** Requeue the command to the start queue.
6420 ** If any disconnected commands,
6422 ** Jump to reselect.
6424 cp
->phys
.header
.savep
= cp
->startp
;
6425 cp
->host_status
= HS_BUSY
;
6426 cp
->scsi_status
= SAM_STAT_ILLEGAL
;
6428 ncr_put_start_queue(np
, cp
);
6430 INB (nc_ctest2
); /* Clear SIGP */
6431 OUTL_DSP (NCB_SCRIPT_PHYS (np
, reselect
));
6433 case SAM_STAT_COMMAND_TERMINATED
:
6434 case SAM_STAT_CHECK_CONDITION
:
6436 ** If we were requesting sense, give up.
6442 ** Device returned CHECK CONDITION status.
6443 ** Prepare all needed data strutures for getting
6448 cp
->scsi_smsg2
[0] = IDENTIFY(0, cmd
->device
->lun
);
6449 cp
->phys
.smsg
.addr
= cpu_to_scr(CCB_PHYS (cp
, scsi_smsg2
));
6450 cp
->phys
.smsg
.size
= cpu_to_scr(1);
6455 cp
->phys
.cmd
.addr
= cpu_to_scr(CCB_PHYS (cp
, sensecmd
));
6456 cp
->phys
.cmd
.size
= cpu_to_scr(6);
6459 ** patch requested size into sense command
6461 cp
->sensecmd
[0] = 0x03;
6462 cp
->sensecmd
[1] = (cmd
->device
->lun
& 0x7) << 5;
6463 cp
->sensecmd
[4] = sizeof(cp
->sense_buf
);
6468 memset(cp
->sense_buf
, 0, sizeof(cp
->sense_buf
));
6469 cp
->phys
.sense
.addr
= cpu_to_scr(CCB_PHYS(cp
,sense_buf
[0]));
6470 cp
->phys
.sense
.size
= cpu_to_scr(sizeof(cp
->sense_buf
));
6473 ** requeue the command.
6475 startp
= cpu_to_scr(NCB_SCRIPTH_PHYS (np
, sdata_in
));
6477 cp
->phys
.header
.savep
= startp
;
6478 cp
->phys
.header
.goalp
= startp
+ 24;
6479 cp
->phys
.header
.lastp
= startp
;
6480 cp
->phys
.header
.wgoalp
= startp
+ 24;
6481 cp
->phys
.header
.wlastp
= startp
;
6483 cp
->host_status
= HS_BUSY
;
6484 cp
->scsi_status
= SAM_STAT_ILLEGAL
;
6485 cp
->auto_sense
= s_status
;
6487 cp
->start
.schedule
.l_paddr
=
6488 cpu_to_scr(NCB_SCRIPT_PHYS (np
, select
));
6491 ** Select without ATN for quirky devices.
6493 if (cmd
->device
->select_no_atn
)
6494 cp
->start
.schedule
.l_paddr
=
6495 cpu_to_scr(NCB_SCRIPTH_PHYS (np
, select_no_atn
));
6497 ncr_put_start_queue(np
, cp
);
6499 OUTL_DSP (NCB_SCRIPT_PHYS (np
, start
));
6509 /*==========================================================
6512 ** ncr chip exception handler for programmed interrupts.
6515 **==========================================================
6518 void ncr_int_sir (struct ncb
*np
)
6521 u_char chg
, ofs
, per
, fak
, wide
;
6522 u_char num
= INB (nc_dsps
);
6523 struct ccb
*cp
=NULL
;
6524 u_long dsa
= INL (nc_dsa
);
6525 u_char target
= INB (nc_sdid
) & 0x0f;
6526 struct tcb
*tp
= &np
->target
[target
];
6527 struct scsi_target
*starget
= tp
->starget
;
6529 if (DEBUG_FLAGS
& DEBUG_TINY
) printk ("I#%d", num
);
6534 ** This is used for HP Zalon/53c720 where INTFLY
6535 ** operation is currently broken.
6537 ncr_wakeup_done(np
);
6538 #ifdef SCSI_NCR_CCB_DONE_SUPPORT
6539 OUTL(nc_dsp
, NCB_SCRIPT_PHYS (np
, done_end
) + 8);
6541 OUTL(nc_dsp
, NCB_SCRIPT_PHYS (np
, start
));
6544 case SIR_RESEL_NO_MSG_IN
:
6545 case SIR_RESEL_NO_IDENTIFY
:
6547 ** If devices reselecting without sending an IDENTIFY
6548 ** message still exist, this should help.
6549 ** We just assume lun=0, 1 CCB, no tag.
6552 OUTL_DSP (scr_to_cpu(tp
->lp
[0]->jump_ccb
[0]));
6556 case SIR_RESEL_BAD_TARGET
: /* Will send a TARGET RESET message */
6557 case SIR_RESEL_BAD_LUN
: /* Will send a TARGET RESET message */
6558 case SIR_RESEL_BAD_I_T_L_Q
: /* Will send an ABORT TAG message */
6559 case SIR_RESEL_BAD_I_T_L
: /* Will send an ABORT message */
6560 printk ("%s:%d: SIR %d, "
6561 "incorrect nexus identification on reselection\n",
6562 ncr_name (np
), target
, num
);
6564 case SIR_DONE_OVERFLOW
:
6565 printk ("%s:%d: SIR %d, "
6566 "CCB done queue overflow\n",
6567 ncr_name (np
), target
, num
);
6569 case SIR_BAD_STATUS
:
6571 if (!cp
|| CCB_PHYS (cp
, phys
) != dsa
)
6573 ncr_sir_to_redo(np
, num
, cp
);
6580 while (cp
&& (CCB_PHYS (cp
, phys
) != dsa
))
6584 BUG_ON(cp
!= np
->header
.cp
);
6586 if (!cp
|| cp
!= np
->header
.cp
)
6591 /*-----------------------------------------------------------------------------
6593 ** Was Sie schon immer ueber transfermode negotiation wissen wollten ...
6594 ** ("Everything you've always wanted to know about transfer mode
6597 ** We try to negotiate sync and wide transfer only after
6598 ** a successful inquire command. We look at byte 7 of the
6599 ** inquire data to determine the capabilities of the target.
6601 ** When we try to negotiate, we append the negotiation message
6602 ** to the identify and (maybe) simple tag message.
6603 ** The host status field is set to HS_NEGOTIATE to mark this
6606 ** If the target doesn't answer this message immediately
6607 ** (as required by the standard), the SIR_NEGO_FAIL interrupt
6608 ** will be raised eventually.
6609 ** The handler removes the HS_NEGOTIATE status, and sets the
6610 ** negotiated value to the default (async / nowide).
6612 ** If we receive a matching answer immediately, we check it
6613 ** for validity, and set the values.
6615 ** If we receive a Reject message immediately, we assume the
6616 ** negotiation has failed, and fall back to standard values.
6618 ** If we receive a negotiation message while not in HS_NEGOTIATE
6619 ** state, it's a target initiated negotiation. We prepare a
6620 ** (hopefully) valid answer, set our parameters, and send back
6621 ** this answer to the target.
6623 ** If the target doesn't fetch the answer (no message out phase),
6624 ** we assume the negotiation has failed, and fall back to default
6627 ** When we set the values, we adjust them in all ccbs belonging
6628 ** to this target, in the controller's register, and in the "phys"
6629 ** field of the controller's struct ncb.
6631 ** Possible cases: hs sir msg_in value send goto
6632 ** We try to negotiate:
6633 ** -> target doesn't msgin NEG FAIL noop defa. - dispatch
6634 ** -> target rejected our msg NEG FAIL reject defa. - dispatch
6635 ** -> target answered (ok) NEG SYNC sdtr set - clrack
6636 ** -> target answered (!ok) NEG SYNC sdtr defa. REJ--->msg_bad
6637 ** -> target answered (ok) NEG WIDE wdtr set - clrack
6638 ** -> target answered (!ok) NEG WIDE wdtr defa. REJ--->msg_bad
6639 ** -> any other msgin NEG FAIL noop defa. - dispatch
6641 ** Target tries to negotiate:
6642 ** -> incoming message --- SYNC sdtr set SDTR -
6643 ** -> incoming message --- WIDE wdtr set WDTR -
6644 ** We sent our answer:
6645 ** -> target doesn't msgout --- PROTO ? defa. - dispatch
6647 **-----------------------------------------------------------------------------
6650 case SIR_NEGO_FAILED
:
6651 /*-------------------------------------------------------
6653 ** Negotiation failed.
6654 ** Target doesn't send an answer message,
6655 ** or target rejected our message.
6657 ** Remove negotiation request.
6659 **-------------------------------------------------------
6661 OUTB (HS_PRT
, HS_BUSY
);
6665 case SIR_NEGO_PROTO
:
6666 /*-------------------------------------------------------
6668 ** Negotiation failed.
6669 ** Target doesn't fetch the answer message.
6671 **-------------------------------------------------------
6674 if (DEBUG_FLAGS
& DEBUG_NEGO
) {
6675 PRINT_ADDR(cp
->cmd
, "negotiation failed sir=%x "
6676 "status=%x.\n", num
, cp
->nego_status
);
6680 ** any error in negotiation:
6681 ** fall back to default mode.
6683 switch (cp
->nego_status
) {
6686 spi_period(starget
) = 0;
6687 spi_offset(starget
) = 0;
6688 ncr_setsync (np
, cp
, 0, 0xe0);
6692 spi_width(starget
) = 0;
6693 ncr_setwide (np
, cp
, 0, 0);
6697 np
->msgin
[0] = NOP
;
6698 np
->msgout
[0] = NOP
;
6699 cp
->nego_status
= 0;
6703 if (DEBUG_FLAGS
& DEBUG_NEGO
) {
6704 ncr_print_msg(cp
, "sync msgin", np
->msgin
);
6710 if (ofs
==0) per
=255;
6713 ** if target sends SDTR message,
6714 ** it CAN transfer synch.
6718 spi_support_sync(starget
) = 1;
6721 ** check values against driver limits.
6724 if (per
< np
->minsync
)
6725 {chg
= 1; per
= np
->minsync
;}
6726 if (per
< tp
->minsync
)
6727 {chg
= 1; per
= tp
->minsync
;}
6728 if (ofs
> tp
->maxoffs
)
6729 {chg
= 1; ofs
= tp
->maxoffs
;}
6732 ** Check against controller limits.
6737 ncr_getsync(np
, per
, &fak
, &scntl3
);
6750 if (DEBUG_FLAGS
& DEBUG_NEGO
) {
6751 PRINT_ADDR(cp
->cmd
, "sync: per=%d scntl3=0x%x ofs=%d "
6752 "fak=%d chg=%d.\n", per
, scntl3
, ofs
, fak
, chg
);
6755 if (INB (HS_PRT
) == HS_NEGOTIATE
) {
6756 OUTB (HS_PRT
, HS_BUSY
);
6757 switch (cp
->nego_status
) {
6760 /* This was an answer message */
6762 /* Answer wasn't acceptable. */
6763 spi_period(starget
) = 0;
6764 spi_offset(starget
) = 0;
6765 ncr_setsync(np
, cp
, 0, 0xe0);
6766 OUTL_DSP(NCB_SCRIPT_PHYS (np
, msg_bad
));
6769 spi_period(starget
) = per
;
6770 spi_offset(starget
) = ofs
;
6771 ncr_setsync(np
, cp
, scntl3
, (fak
<<5)|ofs
);
6772 OUTL_DSP(NCB_SCRIPT_PHYS (np
, clrack
));
6777 spi_width(starget
) = 0;
6778 ncr_setwide(np
, cp
, 0, 0);
6784 ** It was a request. Set value and
6785 ** prepare an answer message
6788 spi_period(starget
) = per
;
6789 spi_offset(starget
) = ofs
;
6790 ncr_setsync(np
, cp
, scntl3
, (fak
<<5)|ofs
);
6792 spi_populate_sync_msg(np
->msgout
, per
, ofs
);
6793 cp
->nego_status
= NS_SYNC
;
6795 if (DEBUG_FLAGS
& DEBUG_NEGO
) {
6796 ncr_print_msg(cp
, "sync msgout", np
->msgout
);
6800 OUTL_DSP (NCB_SCRIPT_PHYS (np
, msg_bad
));
6803 np
->msgin
[0] = NOP
;
6809 ** Wide request message received.
6811 if (DEBUG_FLAGS
& DEBUG_NEGO
) {
6812 ncr_print_msg(cp
, "wide msgin", np
->msgin
);
6816 ** get requested values.
6820 wide
= np
->msgin
[3];
6823 ** if target sends WDTR message,
6824 ** it CAN transfer wide.
6827 if (wide
&& starget
)
6828 spi_support_wide(starget
) = 1;
6831 ** check values against driver limits.
6834 if (wide
> tp
->usrwide
)
6835 {chg
= 1; wide
= tp
->usrwide
;}
6837 if (DEBUG_FLAGS
& DEBUG_NEGO
) {
6838 PRINT_ADDR(cp
->cmd
, "wide: wide=%d chg=%d.\n", wide
,
6842 if (INB (HS_PRT
) == HS_NEGOTIATE
) {
6843 OUTB (HS_PRT
, HS_BUSY
);
6844 switch (cp
->nego_status
) {
6848 ** This was an answer message
6851 /* Answer wasn't acceptable. */
6852 spi_width(starget
) = 0;
6853 ncr_setwide(np
, cp
, 0, 1);
6854 OUTL_DSP (NCB_SCRIPT_PHYS (np
, msg_bad
));
6857 spi_width(starget
) = wide
;
6858 ncr_setwide(np
, cp
, wide
, 1);
6859 OUTL_DSP (NCB_SCRIPT_PHYS (np
, clrack
));
6864 spi_period(starget
) = 0;
6865 spi_offset(starget
) = 0;
6866 ncr_setsync(np
, cp
, 0, 0xe0);
6872 ** It was a request, set value and
6873 ** prepare an answer message
6876 spi_width(starget
) = wide
;
6877 ncr_setwide(np
, cp
, wide
, 1);
6878 spi_populate_width_msg(np
->msgout
, wide
);
6880 np
->msgin
[0] = NOP
;
6882 cp
->nego_status
= NS_WIDE
;
6884 if (DEBUG_FLAGS
& DEBUG_NEGO
) {
6885 ncr_print_msg(cp
, "wide msgout", np
->msgin
);
6889 /*--------------------------------------------------------------------
6891 ** Processing of special messages
6893 **--------------------------------------------------------------------
6896 case SIR_REJECT_RECEIVED
:
6897 /*-----------------------------------------------
6899 ** We received a MESSAGE_REJECT.
6901 **-----------------------------------------------
6904 PRINT_ADDR(cp
->cmd
, "MESSAGE_REJECT received (%x:%x).\n",
6905 (unsigned)scr_to_cpu(np
->lastmsg
), np
->msgout
[0]);
6908 case SIR_REJECT_SENT
:
6909 /*-----------------------------------------------
6911 ** We received an unknown message
6913 **-----------------------------------------------
6916 ncr_print_msg(cp
, "MESSAGE_REJECT sent for", np
->msgin
);
6919 /*--------------------------------------------------------------------
6921 ** Processing of special messages
6923 **--------------------------------------------------------------------
6926 case SIR_IGN_RESIDUE
:
6927 /*-----------------------------------------------
6929 ** We received an IGNORE RESIDUE message,
6930 ** which couldn't be handled by the script.
6932 **-----------------------------------------------
6935 PRINT_ADDR(cp
->cmd
, "IGNORE_WIDE_RESIDUE received, but not yet "
6939 case SIR_MISSING_SAVE
:
6940 /*-----------------------------------------------
6942 ** We received an DISCONNECT message,
6943 ** but the datapointer wasn't saved before.
6945 **-----------------------------------------------
6948 PRINT_ADDR(cp
->cmd
, "DISCONNECT received, but datapointer "
6949 "not saved: data=%x save=%x goal=%x.\n",
6950 (unsigned) INL (nc_temp
),
6951 (unsigned) scr_to_cpu(np
->header
.savep
),
6952 (unsigned) scr_to_cpu(np
->header
.goalp
));
6961 /*==========================================================
6964 ** Acquire a control block
6967 **==========================================================
6970 static struct ccb
*ncr_get_ccb(struct ncb
*np
, struct scsi_cmnd
*cmd
)
6972 u_char tn
= cmd
->device
->id
;
6973 u_char ln
= cmd
->device
->lun
;
6974 struct tcb
*tp
= &np
->target
[tn
];
6975 struct lcb
*lp
= tp
->lp
[ln
];
6976 u_char tag
= NO_TAG
;
6977 struct ccb
*cp
= NULL
;
6980 ** Lun structure available ?
6983 struct list_head
*qp
;
6985 ** Keep from using more tags than we can handle.
6987 if (lp
->usetags
&& lp
->busyccbs
>= lp
->maxnxs
)
6991 ** Allocate a new CCB if needed.
6993 if (list_empty(&lp
->free_ccbq
))
6994 ncr_alloc_ccb(np
, tn
, ln
);
6997 ** Look for free CCB
6999 qp
= ncr_list_pop(&lp
->free_ccbq
);
7001 cp
= list_entry(qp
, struct ccb
, link_ccbq
);
7003 PRINT_ADDR(cmd
, "ccb free list corrupted "
7007 list_add_tail(qp
, &lp
->wait_ccbq
);
7013 ** If a CCB is available,
7014 ** Get a tag for this nexus if required.
7018 tag
= lp
->cb_tags
[lp
->ia_tag
];
7020 else if (lp
->actccbs
> 0)
7025 ** if nothing available, take the default.
7031 ** Wait until available.
7035 if (flags
& SCSI_NOSLEEP
) break;
7036 if (tsleep ((caddr_t
)cp
, PRIBIO
|PCATCH
, "ncr", 0))
7047 ** Move to next available tag if tag used.
7050 if (tag
!= NO_TAG
) {
7052 if (lp
->ia_tag
== MAX_TAGS
)
7054 lp
->tags_umap
|= (((tagmap_t
) 1) << tag
);
7059 ** Remember all informations needed to free this CCB.
7065 if (DEBUG_FLAGS
& DEBUG_TAGS
) {
7066 PRINT_ADDR(cmd
, "ccb @%p using tag %d.\n", cp
, tag
);
7072 /*==========================================================
7075 ** Release one control block
7078 **==========================================================
7081 static void ncr_free_ccb (struct ncb
*np
, struct ccb
*cp
)
7083 struct tcb
*tp
= &np
->target
[cp
->target
];
7084 struct lcb
*lp
= tp
->lp
[cp
->lun
];
7086 if (DEBUG_FLAGS
& DEBUG_TAGS
) {
7087 PRINT_ADDR(cp
->cmd
, "ccb @%p freeing tag %d.\n", cp
, cp
->tag
);
7091 ** If lun control block available,
7092 ** decrement active commands and increment credit,
7093 ** free the tag if any and remove the JUMP for reselect.
7096 if (cp
->tag
!= NO_TAG
) {
7097 lp
->cb_tags
[lp
->if_tag
++] = cp
->tag
;
7098 if (lp
->if_tag
== MAX_TAGS
)
7100 lp
->tags_umap
&= ~(((tagmap_t
) 1) << cp
->tag
);
7101 lp
->tags_smap
&= lp
->tags_umap
;
7102 lp
->jump_ccb
[cp
->tag
] =
7103 cpu_to_scr(NCB_SCRIPTH_PHYS(np
, bad_i_t_l_q
));
7106 cpu_to_scr(NCB_SCRIPTH_PHYS(np
, bad_i_t_l
));
7111 ** Make this CCB available.
7116 list_move(&cp
->link_ccbq
, &lp
->free_ccbq
);
7122 cp
-> host_status
= HS_IDLE
;
7131 wakeup ((caddr_t
) cp
);
7136 #define ncr_reg_bus_addr(r) (np->paddr + offsetof (struct ncr_reg, r))
7138 /*------------------------------------------------------------------------
7139 ** Initialize the fixed part of a CCB structure.
7140 **------------------------------------------------------------------------
7141 **------------------------------------------------------------------------
7143 static void ncr_init_ccb(struct ncb
*np
, struct ccb
*cp
)
7145 ncrcmd copy_4
= np
->features
& FE_PFEN
? SCR_COPY(4) : SCR_COPY_F(4);
7148 ** Remember virtual and bus address of this ccb.
7150 cp
->p_ccb
= vtobus(cp
);
7151 cp
->phys
.header
.cp
= cp
;
7154 ** This allows list_del to work for the default ccb.
7156 INIT_LIST_HEAD(&cp
->link_ccbq
);
7159 ** Initialyze the start and restart launch script.
7161 ** COPY(4) @(...p_phys), @(dsa)
7162 ** JUMP @(sched_point)
7164 cp
->start
.setup_dsa
[0] = cpu_to_scr(copy_4
);
7165 cp
->start
.setup_dsa
[1] = cpu_to_scr(CCB_PHYS(cp
, start
.p_phys
));
7166 cp
->start
.setup_dsa
[2] = cpu_to_scr(ncr_reg_bus_addr(nc_dsa
));
7167 cp
->start
.schedule
.l_cmd
= cpu_to_scr(SCR_JUMP
);
7168 cp
->start
.p_phys
= cpu_to_scr(CCB_PHYS(cp
, phys
));
7170 memcpy(&cp
->restart
, &cp
->start
, sizeof(cp
->restart
));
7172 cp
->start
.schedule
.l_paddr
= cpu_to_scr(NCB_SCRIPT_PHYS (np
, idle
));
7173 cp
->restart
.schedule
.l_paddr
= cpu_to_scr(NCB_SCRIPTH_PHYS (np
, abort
));
7177 /*------------------------------------------------------------------------
7178 ** Allocate a CCB and initialize its fixed part.
7179 **------------------------------------------------------------------------
7180 **------------------------------------------------------------------------
7182 static void ncr_alloc_ccb(struct ncb
*np
, u_char tn
, u_char ln
)
7184 struct tcb
*tp
= &np
->target
[tn
];
7185 struct lcb
*lp
= tp
->lp
[ln
];
7186 struct ccb
*cp
= NULL
;
7189 ** Allocate memory for this CCB.
7191 cp
= m_calloc_dma(sizeof(struct ccb
), "CCB");
7196 ** Count it and initialyze it.
7200 memset(cp
, 0, sizeof (*cp
));
7201 ncr_init_ccb(np
, cp
);
7204 ** Chain into wakeup list and free ccb queue and take it
7205 ** into account for tagged commands.
7207 cp
->link_ccb
= np
->ccb
->link_ccb
;
7208 np
->ccb
->link_ccb
= cp
;
7210 list_add(&cp
->link_ccbq
, &lp
->free_ccbq
);
7213 /*==========================================================
7216 ** Allocation of resources for Targets/Luns/Tags.
7219 **==========================================================
7223 /*------------------------------------------------------------------------
7224 ** Target control block initialisation.
7225 **------------------------------------------------------------------------
7226 ** This data structure is fully initialized after a SCSI command
7227 ** has been successfully completed for this target.
7228 ** It contains a SCRIPT that is called on target reselection.
7229 **------------------------------------------------------------------------
7231 static void ncr_init_tcb (struct ncb
*np
, u_char tn
)
7233 struct tcb
*tp
= &np
->target
[tn
];
7234 ncrcmd copy_1
= np
->features
& FE_PFEN
? SCR_COPY(1) : SCR_COPY_F(1);
7239 ** Jump to next tcb if SFBR does not match this target.
7240 ** JUMP IF (SFBR != #target#), @(next tcb)
7242 tp
->jump_tcb
.l_cmd
=
7243 cpu_to_scr((SCR_JUMP
^ IFFALSE (DATA (0x80 + tn
))));
7244 tp
->jump_tcb
.l_paddr
= np
->jump_tcb
[th
].l_paddr
;
7247 ** Load the synchronous transfer register.
7248 ** COPY @(tp->sval), @(sxfer)
7250 tp
->getscr
[0] = cpu_to_scr(copy_1
);
7251 tp
->getscr
[1] = cpu_to_scr(vtobus (&tp
->sval
));
7252 #ifdef SCSI_NCR_BIG_ENDIAN
7253 tp
->getscr
[2] = cpu_to_scr(ncr_reg_bus_addr(nc_sxfer
) ^ 3);
7255 tp
->getscr
[2] = cpu_to_scr(ncr_reg_bus_addr(nc_sxfer
));
7259 ** Load the timing register.
7260 ** COPY @(tp->wval), @(scntl3)
7262 tp
->getscr
[3] = cpu_to_scr(copy_1
);
7263 tp
->getscr
[4] = cpu_to_scr(vtobus (&tp
->wval
));
7264 #ifdef SCSI_NCR_BIG_ENDIAN
7265 tp
->getscr
[5] = cpu_to_scr(ncr_reg_bus_addr(nc_scntl3
) ^ 3);
7267 tp
->getscr
[5] = cpu_to_scr(ncr_reg_bus_addr(nc_scntl3
));
7271 ** Get the IDENTIFY message and the lun.
7272 ** CALL @script(resel_lun)
7274 tp
->call_lun
.l_cmd
= cpu_to_scr(SCR_CALL
);
7275 tp
->call_lun
.l_paddr
= cpu_to_scr(NCB_SCRIPT_PHYS (np
, resel_lun
));
7278 ** Look for the lun control block of this nexus.
7280 ** JUMP ^ IFTRUE (MASK (i, 3)), @(next_lcb)
7282 for (i
= 0 ; i
< 4 ; i
++) {
7283 tp
->jump_lcb
[i
].l_cmd
=
7284 cpu_to_scr((SCR_JUMP
^ IFTRUE (MASK (i
, 3))));
7285 tp
->jump_lcb
[i
].l_paddr
=
7286 cpu_to_scr(NCB_SCRIPTH_PHYS (np
, bad_identify
));
7290 ** Link this target control block to the JUMP chain.
7292 np
->jump_tcb
[th
].l_paddr
= cpu_to_scr(vtobus (&tp
->jump_tcb
));
7295 ** These assert's should be moved at driver initialisations.
7297 #ifdef SCSI_NCR_BIG_ENDIAN
7298 BUG_ON(((offsetof(struct ncr_reg
, nc_sxfer
) ^
7299 offsetof(struct tcb
, sval
)) &3) != 3);
7300 BUG_ON(((offsetof(struct ncr_reg
, nc_scntl3
) ^
7301 offsetof(struct tcb
, wval
)) &3) != 3);
7303 BUG_ON(((offsetof(struct ncr_reg
, nc_sxfer
) ^
7304 offsetof(struct tcb
, sval
)) &3) != 0);
7305 BUG_ON(((offsetof(struct ncr_reg
, nc_scntl3
) ^
7306 offsetof(struct tcb
, wval
)) &3) != 0);
7311 /*------------------------------------------------------------------------
7312 ** Lun control block allocation and initialization.
7313 **------------------------------------------------------------------------
7314 ** This data structure is allocated and initialized after a SCSI
7315 ** command has been successfully completed for this target/lun.
7316 **------------------------------------------------------------------------
7318 static struct lcb
*ncr_alloc_lcb (struct ncb
*np
, u_char tn
, u_char ln
)
7320 struct tcb
*tp
= &np
->target
[tn
];
7321 struct lcb
*lp
= tp
->lp
[ln
];
7322 ncrcmd copy_4
= np
->features
& FE_PFEN
? SCR_COPY(4) : SCR_COPY_F(4);
7326 ** Already done, return.
7332 ** Allocate the lcb.
7334 lp
= m_calloc_dma(sizeof(struct lcb
), "LCB");
7337 memset(lp
, 0, sizeof(*lp
));
7341 ** Initialize the target control block if not yet.
7343 if (!tp
->jump_tcb
.l_cmd
)
7344 ncr_init_tcb(np
, tn
);
7347 ** Initialize the CCB queue headers.
7349 INIT_LIST_HEAD(&lp
->free_ccbq
);
7350 INIT_LIST_HEAD(&lp
->busy_ccbq
);
7351 INIT_LIST_HEAD(&lp
->wait_ccbq
);
7352 INIT_LIST_HEAD(&lp
->skip_ccbq
);
7355 ** Set max CCBs to 1 and use the default 1 entry
7356 ** jump table by default.
7359 lp
->jump_ccb
= &lp
->jump_ccb_0
;
7360 lp
->p_jump_ccb
= cpu_to_scr(vtobus(lp
->jump_ccb
));
7363 ** Initilialyze the reselect script:
7365 ** Jump to next lcb if SFBR does not match this lun.
7366 ** Load TEMP with the CCB direct jump table bus address.
7367 ** Get the SIMPLE TAG message and the tag.
7369 ** JUMP IF (SFBR != #lun#), @(next lcb)
7370 ** COPY @(lp->p_jump_ccb), @(temp)
7371 ** JUMP @script(resel_notag)
7373 lp
->jump_lcb
.l_cmd
=
7374 cpu_to_scr((SCR_JUMP
^ IFFALSE (MASK (0x80+ln
, 0xff))));
7375 lp
->jump_lcb
.l_paddr
= tp
->jump_lcb
[lh
].l_paddr
;
7377 lp
->load_jump_ccb
[0] = cpu_to_scr(copy_4
);
7378 lp
->load_jump_ccb
[1] = cpu_to_scr(vtobus (&lp
->p_jump_ccb
));
7379 lp
->load_jump_ccb
[2] = cpu_to_scr(ncr_reg_bus_addr(nc_temp
));
7381 lp
->jump_tag
.l_cmd
= cpu_to_scr(SCR_JUMP
);
7382 lp
->jump_tag
.l_paddr
= cpu_to_scr(NCB_SCRIPT_PHYS (np
, resel_notag
));
7385 ** Link this lun control block to the JUMP chain.
7387 tp
->jump_lcb
[lh
].l_paddr
= cpu_to_scr(vtobus (&lp
->jump_lcb
));
7390 ** Initialize command queuing control.
7400 /*------------------------------------------------------------------------
7401 ** Lun control block setup on INQUIRY data received.
7402 **------------------------------------------------------------------------
7403 ** We only support WIDE, SYNC for targets and CMDQ for logical units.
7404 ** This setup is done on each INQUIRY since we are expecting user
7405 ** will play with CHANGE DEFINITION commands. :-)
7406 **------------------------------------------------------------------------
7408 static struct lcb
*ncr_setup_lcb (struct ncb
*np
, struct scsi_device
*sdev
)
7410 unsigned char tn
= sdev
->id
, ln
= sdev
->lun
;
7411 struct tcb
*tp
= &np
->target
[tn
];
7412 struct lcb
*lp
= tp
->lp
[ln
];
7414 /* If no lcb, try to allocate it. */
7415 if (!lp
&& !(lp
= ncr_alloc_lcb(np
, tn
, ln
)))
7419 ** If unit supports tagged commands, allocate the
7420 ** CCB JUMP table if not yet.
7422 if (sdev
->tagged_supported
&& lp
->jump_ccb
== &lp
->jump_ccb_0
) {
7424 lp
->jump_ccb
= m_calloc_dma(256, "JUMP_CCB");
7425 if (!lp
->jump_ccb
) {
7426 lp
->jump_ccb
= &lp
->jump_ccb_0
;
7429 lp
->p_jump_ccb
= cpu_to_scr(vtobus(lp
->jump_ccb
));
7430 for (i
= 0 ; i
< 64 ; i
++)
7432 cpu_to_scr(NCB_SCRIPTH_PHYS (np
, bad_i_t_l_q
));
7433 for (i
= 0 ; i
< MAX_TAGS
; i
++)
7435 lp
->maxnxs
= MAX_TAGS
;
7436 lp
->tags_stime
= jiffies
+ 3*HZ
;
7437 ncr_setup_tags (np
, sdev
);
7445 /*==========================================================
7448 ** Build Scatter Gather Block
7451 **==========================================================
7453 ** The transfer area may be scattered among
7454 ** several non adjacent physical pages.
7456 ** We may use MAX_SCATTER blocks.
7458 **----------------------------------------------------------
7462 ** We try to reduce the number of interrupts caused
7463 ** by unexpected phase changes due to disconnects.
7464 ** A typical harddisk may disconnect before ANY block.
7465 ** If we wanted to avoid unexpected phase changes at all
7466 ** we had to use a break point every 512 bytes.
7467 ** Of course the number of scatter/gather blocks is
7469 ** Under Linux, the scatter/gatter blocks are provided by
7470 ** the generic driver. We just have to copy addresses and
7471 ** sizes to the data segment array.
7474 static int ncr_scatter(struct ncb
*np
, struct ccb
*cp
, struct scsi_cmnd
*cmd
)
7477 int use_sg
= scsi_sg_count(cmd
);
7481 use_sg
= map_scsi_sg_data(np
, cmd
);
7483 struct scatterlist
*sg
;
7484 struct scr_tblmove
*data
;
7486 if (use_sg
> MAX_SCATTER
) {
7487 unmap_scsi_data(np
, cmd
);
7491 data
= &cp
->phys
.data
[MAX_SCATTER
- use_sg
];
7493 scsi_for_each_sg(cmd
, sg
, use_sg
, segment
) {
7494 dma_addr_t baddr
= sg_dma_address(sg
);
7495 unsigned int len
= sg_dma_len(sg
);
7497 ncr_build_sge(np
, &data
[segment
], baddr
, len
);
7498 cp
->data_len
+= len
;
7506 /*==========================================================
7509 ** Test the bus snoop logic :-(
7511 ** Has to be called with interrupts disabled.
7514 **==========================================================
7517 static int __init
ncr_regtest (struct ncb
* np
)
7519 register volatile u32 data
;
7521 ** ncr registers may NOT be cached.
7522 ** write 0xffffffff to a read only register area,
7523 ** and try to read it back.
7526 OUTL_OFF(offsetof(struct ncr_reg
, nc_dstat
), data
);
7527 data
= INL_OFF(offsetof(struct ncr_reg
, nc_dstat
));
7529 if (data
== 0xffffffff) {
7531 if ((data
& 0xe2f0fffd) != 0x02000080) {
7533 printk ("CACHE TEST FAILED: reg dstat-sstat2 readback %x.\n",
7540 static int __init
ncr_snooptest (struct ncb
* np
)
7542 u32 ncr_rd
, ncr_wr
, ncr_bk
, host_rd
, host_wr
, pc
;
7545 err
|= ncr_regtest (np
);
7551 pc
= NCB_SCRIPTH_PHYS (np
, snooptest
);
7555 ** Set memory and register.
7557 np
->ncr_cache
= cpu_to_scr(host_wr
);
7558 OUTL (nc_temp
, ncr_wr
);
7560 ** Start script (exchange values)
7564 ** Wait 'til done (with timeout)
7566 for (i
=0; i
<NCR_SNOOP_TIMEOUT
; i
++)
7567 if (INB(nc_istat
) & (INTF
|SIP
|DIP
))
7570 ** Save termination position.
7574 ** Read memory and register.
7576 host_rd
= scr_to_cpu(np
->ncr_cache
);
7577 ncr_rd
= INL (nc_scratcha
);
7578 ncr_bk
= INL (nc_temp
);
7582 ncr_chip_reset(np
, 100);
7584 ** check for timeout
7586 if (i
>=NCR_SNOOP_TIMEOUT
) {
7587 printk ("CACHE TEST FAILED: timeout.\n");
7591 ** Check termination position.
7593 if (pc
!= NCB_SCRIPTH_PHYS (np
, snoopend
)+8) {
7594 printk ("CACHE TEST FAILED: script execution failed.\n");
7595 printk ("start=%08lx, pc=%08lx, end=%08lx\n",
7596 (u_long
) NCB_SCRIPTH_PHYS (np
, snooptest
), (u_long
) pc
,
7597 (u_long
) NCB_SCRIPTH_PHYS (np
, snoopend
) +8);
7603 if (host_wr
!= ncr_rd
) {
7604 printk ("CACHE TEST FAILED: host wrote %d, ncr read %d.\n",
7605 (int) host_wr
, (int) ncr_rd
);
7608 if (host_rd
!= ncr_wr
) {
7609 printk ("CACHE TEST FAILED: ncr wrote %d, host read %d.\n",
7610 (int) ncr_wr
, (int) host_rd
);
7613 if (ncr_bk
!= ncr_wr
) {
7614 printk ("CACHE TEST FAILED: ncr wrote %d, read back %d.\n",
7615 (int) ncr_wr
, (int) ncr_bk
);
7621 /*==========================================================
7623 ** Determine the ncr's clock frequency.
7624 ** This is essential for the negotiation
7625 ** of the synchronous transfer rate.
7627 **==========================================================
7629 ** Note: we have to return the correct value.
7630 ** THERE IS NO SAFE DEFAULT VALUE.
7632 ** Most NCR/SYMBIOS boards are delivered with a 40 Mhz clock.
7633 ** 53C860 and 53C875 rev. 1 support fast20 transfers but
7634 ** do not have a clock doubler and so are provided with a
7635 ** 80 MHz clock. All other fast20 boards incorporate a doubler
7636 ** and so should be delivered with a 40 MHz clock.
7637 ** The future fast40 chips (895/895) use a 40 Mhz base clock
7638 ** and provide a clock quadrupler (160 Mhz). The code below
7639 ** tries to deal as cleverly as possible with all this stuff.
7641 **----------------------------------------------------------
7645 * Select NCR SCSI clock frequency
7647 static void ncr_selectclock(struct ncb
*np
, u_char scntl3
)
7649 if (np
->multiplier
< 2) {
7650 OUTB(nc_scntl3
, scntl3
);
7654 if (bootverbose
>= 2)
7655 printk ("%s: enabling clock multiplier\n", ncr_name(np
));
7657 OUTB(nc_stest1
, DBLEN
); /* Enable clock multiplier */
7658 if (np
->multiplier
> 2) { /* Poll bit 5 of stest4 for quadrupler */
7660 while (!(INB(nc_stest4
) & LCKFRQ
) && --i
> 0)
7663 printk("%s: the chip cannot lock the frequency\n", ncr_name(np
));
7664 } else /* Wait 20 micro-seconds for doubler */
7666 OUTB(nc_stest3
, HSC
); /* Halt the scsi clock */
7667 OUTB(nc_scntl3
, scntl3
);
7668 OUTB(nc_stest1
, (DBLEN
|DBLSEL
));/* Select clock multiplier */
7669 OUTB(nc_stest3
, 0x00); /* Restart scsi clock */
7674 * calculate NCR SCSI clock frequency (in KHz)
7676 static unsigned __init
ncrgetfreq (struct ncb
*np
, int gen
)
7682 * Measure GEN timer delay in order
7683 * to calculate SCSI clock frequency
7685 * This code will never execute too
7686 * many loop iterations (if DELAY is
7687 * reasonably correct). It could get
7688 * too low a delay (too high a freq.)
7689 * if the CPU is slow executing the
7690 * loop for some reason (an NMI, for
7691 * example). For this reason we will
7692 * if multiple measurements are to be
7693 * performed trust the higher delay
7694 * (lower frequency returned).
7696 OUTB (nc_stest1
, 0); /* make sure clock doubler is OFF */
7697 OUTW (nc_sien
, 0); /* mask all scsi interrupts */
7698 (void) INW (nc_sist
); /* clear pending scsi interrupt */
7699 OUTB (nc_dien
, 0); /* mask all dma interrupts */
7700 (void) INW (nc_sist
); /* another one, just to be sure :) */
7701 OUTB (nc_scntl3
, 4); /* set pre-scaler to divide by 3 */
7702 OUTB (nc_stime1
, 0); /* disable general purpose timer */
7703 OUTB (nc_stime1
, gen
); /* set to nominal delay of 1<<gen * 125us */
7704 while (!(INW(nc_sist
) & GEN
) && ms
++ < 100000) {
7705 for (count
= 0; count
< 10; count
++)
7706 udelay(100); /* count ms */
7708 OUTB (nc_stime1
, 0); /* disable general purpose timer */
7710 * set prescaler to divide by whatever 0 means
7711 * 0 ought to choose divide by 2, but appears
7712 * to set divide by 3.5 mode in my 53c810 ...
7714 OUTB (nc_scntl3
, 0);
7716 if (bootverbose
>= 2)
7717 printk ("%s: Delay (GEN=%d): %u msec\n", ncr_name(np
), gen
, ms
);
7719 * adjust for prescaler, and convert into KHz
7721 return ms
? ((1 << gen
) * 4340) / ms
: 0;
7725 * Get/probe NCR SCSI clock frequency
7727 static void __init
ncr_getclock (struct ncb
*np
, int mult
)
7729 unsigned char scntl3
= INB(nc_scntl3
);
7730 unsigned char stest1
= INB(nc_stest1
);
7737 ** True with 875 or 895 with clock multiplier selected
7739 if (mult
> 1 && (stest1
& (DBLEN
+DBLSEL
)) == DBLEN
+DBLSEL
) {
7740 if (bootverbose
>= 2)
7741 printk ("%s: clock multiplier found\n", ncr_name(np
));
7742 np
->multiplier
= mult
;
7746 ** If multiplier not found or scntl3 not 7,5,3,
7747 ** reset chip and get frequency from general purpose timer.
7748 ** Otherwise trust scntl3 BIOS setting.
7750 if (np
->multiplier
!= mult
|| (scntl3
& 7) < 3 || !(scntl3
& 1)) {
7753 ncr_chip_reset(np
, 5);
7755 (void) ncrgetfreq (np
, 11); /* throw away first result */
7756 f1
= ncrgetfreq (np
, 11);
7757 f2
= ncrgetfreq (np
, 11);
7760 printk ("%s: NCR clock is %uKHz, %uKHz\n", ncr_name(np
), f1
, f2
);
7762 if (f1
> f2
) f1
= f2
; /* trust lower result */
7764 if (f1
< 45000) f1
= 40000;
7765 else if (f1
< 55000) f1
= 50000;
7768 if (f1
< 80000 && mult
> 1) {
7769 if (bootverbose
>= 2)
7770 printk ("%s: clock multiplier assumed\n", ncr_name(np
));
7771 np
->multiplier
= mult
;
7774 if ((scntl3
& 7) == 3) f1
= 40000;
7775 else if ((scntl3
& 7) == 5) f1
= 80000;
7778 f1
/= np
->multiplier
;
7782 ** Compute controller synchronous parameters.
7784 f1
*= np
->multiplier
;
7788 /*===================== LINUX ENTRY POINTS SECTION ==========================*/
7790 static int ncr53c8xx_slave_alloc(struct scsi_device
*device
)
7792 struct Scsi_Host
*host
= device
->host
;
7793 struct ncb
*np
= ((struct host_data
*) host
->hostdata
)->ncb
;
7794 struct tcb
*tp
= &np
->target
[device
->id
];
7795 tp
->starget
= device
->sdev_target
;
7800 static int ncr53c8xx_slave_configure(struct scsi_device
*device
)
7802 struct Scsi_Host
*host
= device
->host
;
7803 struct ncb
*np
= ((struct host_data
*) host
->hostdata
)->ncb
;
7804 struct tcb
*tp
= &np
->target
[device
->id
];
7805 struct lcb
*lp
= tp
->lp
[device
->lun
];
7806 int numtags
, depth_to_use
;
7808 ncr_setup_lcb(np
, device
);
7811 ** Select queue depth from driver setup.
7812 ** Donnot use more than configured by user.
7814 ** Donnot use more than our maximum.
7816 numtags
= device_queue_depth(np
->unit
, device
->id
, device
->lun
);
7817 if (numtags
> tp
->usrtags
)
7818 numtags
= tp
->usrtags
;
7819 if (!device
->tagged_supported
)
7821 depth_to_use
= numtags
;
7822 if (depth_to_use
< 2)
7824 if (depth_to_use
> MAX_TAGS
)
7825 depth_to_use
= MAX_TAGS
;
7827 scsi_change_queue_depth(device
, depth_to_use
);
7830 ** Since the queue depth is not tunable under Linux,
7831 ** we need to know this value in order not to
7832 ** announce stupid things to user.
7834 ** XXX(hch): As of Linux 2.6 it certainly _is_ tunable..
7835 ** In fact we just tuned it, or did I miss
7836 ** something important? :)
7839 lp
->numtags
= lp
->maxtags
= numtags
;
7840 lp
->scdev_depth
= depth_to_use
;
7842 ncr_setup_tags (np
, device
);
7844 #ifdef DEBUG_NCR53C8XX
7845 printk("ncr53c8xx_select_queue_depth: host=%d, id=%d, lun=%d, depth=%d\n",
7846 np
->unit
, device
->id
, device
->lun
, depth_to_use
);
7849 if (spi_support_sync(device
->sdev_target
) &&
7850 !spi_initial_dv(device
->sdev_target
))
7851 spi_dv_device(device
);
7855 static int ncr53c8xx_queue_command_lck (struct scsi_cmnd
*cmd
, void (*done
)(struct scsi_cmnd
*))
7857 struct ncb
*np
= ((struct host_data
*) cmd
->device
->host
->hostdata
)->ncb
;
7858 unsigned long flags
;
7861 #ifdef DEBUG_NCR53C8XX
7862 printk("ncr53c8xx_queue_command\n");
7865 cmd
->scsi_done
= done
;
7866 cmd
->host_scribble
= NULL
;
7867 cmd
->__data_mapped
= 0;
7868 cmd
->__data_mapping
= 0;
7870 spin_lock_irqsave(&np
->smp_lock
, flags
);
7872 if ((sts
= ncr_queue_command(np
, cmd
)) != DID_OK
) {
7873 set_host_byte(cmd
, sts
);
7874 #ifdef DEBUG_NCR53C8XX
7875 printk("ncr53c8xx : command not queued - result=%d\n", sts
);
7878 #ifdef DEBUG_NCR53C8XX
7880 printk("ncr53c8xx : command successfully queued\n");
7883 spin_unlock_irqrestore(&np
->smp_lock
, flags
);
7885 if (sts
!= DID_OK
) {
7886 unmap_scsi_data(np
, cmd
);
7894 static DEF_SCSI_QCMD(ncr53c8xx_queue_command
)
7896 irqreturn_t
ncr53c8xx_intr(int irq
, void *dev_id
)
7898 unsigned long flags
;
7899 struct Scsi_Host
*shost
= (struct Scsi_Host
*)dev_id
;
7900 struct host_data
*host_data
= (struct host_data
*)shost
->hostdata
;
7901 struct ncb
*np
= host_data
->ncb
;
7902 struct scsi_cmnd
*done_list
;
7904 #ifdef DEBUG_NCR53C8XX
7905 printk("ncr53c8xx : interrupt received\n");
7908 if (DEBUG_FLAGS
& DEBUG_TINY
) printk ("[");
7910 spin_lock_irqsave(&np
->smp_lock
, flags
);
7912 done_list
= np
->done_list
;
7913 np
->done_list
= NULL
;
7914 spin_unlock_irqrestore(&np
->smp_lock
, flags
);
7916 if (DEBUG_FLAGS
& DEBUG_TINY
) printk ("]\n");
7919 ncr_flush_done_cmds(done_list
);
7923 static void ncr53c8xx_timeout(struct timer_list
*t
)
7925 struct ncb
*np
= from_timer(np
, t
, timer
);
7926 unsigned long flags
;
7927 struct scsi_cmnd
*done_list
;
7929 spin_lock_irqsave(&np
->smp_lock
, flags
);
7931 done_list
= np
->done_list
;
7932 np
->done_list
= NULL
;
7933 spin_unlock_irqrestore(&np
->smp_lock
, flags
);
7936 ncr_flush_done_cmds(done_list
);
7939 static int ncr53c8xx_bus_reset(struct scsi_cmnd
*cmd
)
7941 struct ncb
*np
= ((struct host_data
*) cmd
->device
->host
->hostdata
)->ncb
;
7943 unsigned long flags
;
7944 struct scsi_cmnd
*done_list
;
7947 * If the mid-level driver told us reset is synchronous, it seems
7948 * that we must call the done() callback for the involved command,
7949 * even if this command was not queued to the low-level driver,
7950 * before returning SUCCESS.
7953 spin_lock_irqsave(&np
->smp_lock
, flags
);
7954 sts
= ncr_reset_bus(np
);
7956 done_list
= np
->done_list
;
7957 np
->done_list
= NULL
;
7958 spin_unlock_irqrestore(&np
->smp_lock
, flags
);
7960 ncr_flush_done_cmds(done_list
);
7967 ** Scsi command waiting list management.
7969 ** It may happen that we cannot insert a scsi command into the start queue,
7970 ** in the following circumstances.
7971 ** Too few preallocated ccb(s),
7972 ** maxtags < cmd_per_lun of the Linux host control block,
7974 ** Such scsi commands are inserted into a waiting list.
7975 ** When a scsi command complete, we try to requeue the commands of the
7979 #define next_wcmd host_scribble
7981 static void insert_into_waiting_list(struct ncb
*np
, struct scsi_cmnd
*cmd
)
7983 struct scsi_cmnd
*wcmd
;
7985 #ifdef DEBUG_WAITING_LIST
7986 printk("%s: cmd %lx inserted into waiting list\n", ncr_name(np
), (u_long
) cmd
);
7988 cmd
->next_wcmd
= NULL
;
7989 if (!(wcmd
= np
->waiting_list
)) np
->waiting_list
= cmd
;
7991 while (wcmd
->next_wcmd
)
7992 wcmd
= (struct scsi_cmnd
*) wcmd
->next_wcmd
;
7993 wcmd
->next_wcmd
= (char *) cmd
;
7997 static void process_waiting_list(struct ncb
*np
, int sts
)
7999 struct scsi_cmnd
*waiting_list
, *wcmd
;
8001 waiting_list
= np
->waiting_list
;
8002 np
->waiting_list
= NULL
;
8004 #ifdef DEBUG_WAITING_LIST
8005 if (waiting_list
) printk("%s: waiting_list=%lx processing sts=%d\n", ncr_name(np
), (u_long
) waiting_list
, sts
);
8007 while ((wcmd
= waiting_list
) != NULL
) {
8008 waiting_list
= (struct scsi_cmnd
*) wcmd
->next_wcmd
;
8009 wcmd
->next_wcmd
= NULL
;
8010 if (sts
== DID_OK
) {
8011 #ifdef DEBUG_WAITING_LIST
8012 printk("%s: cmd %lx trying to requeue\n", ncr_name(np
), (u_long
) wcmd
);
8014 sts
= ncr_queue_command(np
, wcmd
);
8016 if (sts
!= DID_OK
) {
8017 #ifdef DEBUG_WAITING_LIST
8018 printk("%s: cmd %lx done forced sts=%d\n", ncr_name(np
), (u_long
) wcmd
, sts
);
8020 set_host_byte(wcmd
, sts
);
8021 ncr_queue_done_cmd(np
, wcmd
);
8028 static ssize_t
show_ncr53c8xx_revision(struct device
*dev
,
8029 struct device_attribute
*attr
, char *buf
)
8031 struct Scsi_Host
*host
= class_to_shost(dev
);
8032 struct host_data
*host_data
= (struct host_data
*)host
->hostdata
;
8034 return snprintf(buf
, 20, "0x%x\n", host_data
->ncb
->revision_id
);
8037 static struct device_attribute ncr53c8xx_revision_attr
= {
8038 .attr
= { .name
= "revision", .mode
= S_IRUGO
, },
8039 .show
= show_ncr53c8xx_revision
,
8042 static struct device_attribute
*ncr53c8xx_host_attrs
[] = {
8043 &ncr53c8xx_revision_attr
,
8047 /*==========================================================
8049 ** Boot command line.
8051 **==========================================================
8054 char *ncr53c8xx
; /* command line passed by insmod */
8055 module_param(ncr53c8xx
, charp
, 0);
8059 static int __init
ncr53c8xx_setup(char *str
)
8061 return sym53c8xx__setup(str
);
8064 __setup("ncr53c8xx=", ncr53c8xx_setup
);
8069 * Host attach and initialisations.
8071 * Allocate host data and ncb structure.
8072 * Request IO region and remap MMIO region.
8073 * Do chip initialization.
8074 * If all is OK, install interrupt handling and
8075 * start the timer daemon.
8077 struct Scsi_Host
* __init
ncr_attach(struct scsi_host_template
*tpnt
,
8078 int unit
, struct ncr_device
*device
)
8080 struct host_data
*host_data
;
8081 struct ncb
*np
= NULL
;
8082 struct Scsi_Host
*instance
= NULL
;
8087 tpnt
->name
= SCSI_NCR_DRIVER_NAME
;
8088 if (!tpnt
->shost_attrs
)
8089 tpnt
->shost_attrs
= ncr53c8xx_host_attrs
;
8091 tpnt
->queuecommand
= ncr53c8xx_queue_command
;
8092 tpnt
->slave_configure
= ncr53c8xx_slave_configure
;
8093 tpnt
->slave_alloc
= ncr53c8xx_slave_alloc
;
8094 tpnt
->eh_bus_reset_handler
= ncr53c8xx_bus_reset
;
8095 tpnt
->can_queue
= SCSI_NCR_CAN_QUEUE
;
8097 tpnt
->sg_tablesize
= SCSI_NCR_SG_TABLESIZE
;
8098 tpnt
->cmd_per_lun
= SCSI_NCR_CMD_PER_LUN
;
8100 if (device
->differential
)
8101 driver_setup
.diff_support
= device
->differential
;
8103 printk(KERN_INFO
"ncr53c720-%d: rev 0x%x irq %d\n",
8104 unit
, device
->chip
.revision_id
, device
->slot
.irq
);
8106 instance
= scsi_host_alloc(tpnt
, sizeof(*host_data
));
8109 host_data
= (struct host_data
*) instance
->hostdata
;
8111 np
= __m_calloc_dma(device
->dev
, sizeof(struct ncb
), "NCB");
8114 spin_lock_init(&np
->smp_lock
);
8115 np
->dev
= device
->dev
;
8116 np
->p_ncb
= vtobus(np
);
8117 host_data
->ncb
= np
;
8119 np
->ccb
= m_calloc_dma(sizeof(struct ccb
), "CCB");
8123 /* Store input information in the host data structure. */
8125 np
->verbose
= driver_setup
.verbose
;
8126 sprintf(np
->inst_name
, "ncr53c720-%d", np
->unit
);
8127 np
->revision_id
= device
->chip
.revision_id
;
8128 np
->features
= device
->chip
.features
;
8129 np
->clock_divn
= device
->chip
.nr_divisor
;
8130 np
->maxoffs
= device
->chip
.offset_max
;
8131 np
->maxburst
= device
->chip
.burst_max
;
8132 np
->myaddr
= device
->host_id
;
8134 /* Allocate SCRIPTS areas. */
8135 np
->script0
= m_calloc_dma(sizeof(struct script
), "SCRIPT");
8138 np
->scripth0
= m_calloc_dma(sizeof(struct scripth
), "SCRIPTH");
8142 timer_setup(&np
->timer
, ncr53c8xx_timeout
, 0);
8144 /* Try to map the controller chip to virtual and physical memory. */
8146 np
->paddr
= device
->slot
.base
;
8147 np
->paddr2
= (np
->features
& FE_RAM
) ? device
->slot
.base_2
: 0;
8149 if (device
->slot
.base_v
)
8150 np
->vaddr
= device
->slot
.base_v
;
8152 np
->vaddr
= ioremap(device
->slot
.base_c
, 128);
8156 "%s: can't map memory mapped IO region\n",ncr_name(np
));
8159 if (bootverbose
> 1)
8161 "%s: using memory mapped IO at virtual address 0x%lx\n", ncr_name(np
), (u_long
) np
->vaddr
);
8164 /* Make the controller's registers available. Now the INB INW INL
8165 * OUTB OUTW OUTL macros can be used safely.
8168 np
->reg
= (struct ncr_reg __iomem
*)np
->vaddr
;
8170 /* Do chip dependent initialization. */
8171 ncr_prepare_setting(np
);
8173 if (np
->paddr2
&& sizeof(struct script
) > 4096) {
8175 printk(KERN_WARNING
"%s: script too large, NOT using on chip RAM.\n",
8179 instance
->max_channel
= 0;
8180 instance
->this_id
= np
->myaddr
;
8181 instance
->max_id
= np
->maxwide
? 16 : 8;
8182 instance
->max_lun
= SCSI_NCR_MAX_LUN
;
8183 instance
->base
= (unsigned long) np
->reg
;
8184 instance
->irq
= device
->slot
.irq
;
8185 instance
->unique_id
= device
->slot
.base
;
8186 instance
->dma_channel
= 0;
8187 instance
->cmd_per_lun
= MAX_TAGS
;
8188 instance
->can_queue
= (MAX_START
-4);
8189 /* This can happen if you forget to call ncr53c8xx_init from
8190 * your module_init */
8191 BUG_ON(!ncr53c8xx_transport_template
);
8192 instance
->transportt
= ncr53c8xx_transport_template
;
8194 /* Patch script to physical addresses */
8195 ncr_script_fill(&script0
, &scripth0
);
8197 np
->scripth
= np
->scripth0
;
8198 np
->p_scripth
= vtobus(np
->scripth
);
8199 np
->p_script
= (np
->paddr2
) ? np
->paddr2
: vtobus(np
->script0
);
8201 ncr_script_copy_and_bind(np
, (ncrcmd
*) &script0
,
8202 (ncrcmd
*) np
->script0
, sizeof(struct script
));
8203 ncr_script_copy_and_bind(np
, (ncrcmd
*) &scripth0
,
8204 (ncrcmd
*) np
->scripth0
, sizeof(struct scripth
));
8205 np
->ccb
->p_ccb
= vtobus (np
->ccb
);
8207 /* Patch the script for LED support. */
8209 if (np
->features
& FE_LED0
) {
8210 np
->script0
->idle
[0] =
8211 cpu_to_scr(SCR_REG_REG(gpreg
, SCR_OR
, 0x01));
8212 np
->script0
->reselected
[0] =
8213 cpu_to_scr(SCR_REG_REG(gpreg
, SCR_AND
, 0xfe));
8214 np
->script0
->start
[0] =
8215 cpu_to_scr(SCR_REG_REG(gpreg
, SCR_AND
, 0xfe));
8219 * Look for the target control block of this nexus.
8221 * JUMP ^ IFTRUE (MASK (i, 3)), @(next_lcb)
8223 for (i
= 0 ; i
< 4 ; i
++) {
8224 np
->jump_tcb
[i
].l_cmd
=
8225 cpu_to_scr((SCR_JUMP
^ IFTRUE (MASK (i
, 3))));
8226 np
->jump_tcb
[i
].l_paddr
=
8227 cpu_to_scr(NCB_SCRIPTH_PHYS (np
, bad_target
));
8230 ncr_chip_reset(np
, 100);
8232 /* Now check the cache handling of the chipset. */
8234 if (ncr_snooptest(np
)) {
8235 printk(KERN_ERR
"CACHE INCORRECTLY CONFIGURED.\n");
8239 /* Install the interrupt handler. */
8240 np
->irq
= device
->slot
.irq
;
8242 /* Initialize the fixed part of the default ccb. */
8243 ncr_init_ccb(np
, np
->ccb
);
8246 * After SCSI devices have been opened, we cannot reset the bus
8247 * safely, so we do it here. Interrupt handler does the real work.
8248 * Process the reset exception if interrupts are not enabled yet.
8249 * Then enable disconnects.
8251 spin_lock_irqsave(&np
->smp_lock
, flags
);
8252 if (ncr_reset_scsi_bus(np
, 0, driver_setup
.settle_delay
) != 0) {
8253 printk(KERN_ERR
"%s: FATAL ERROR: CHECK SCSI BUS - CABLES, TERMINATION, DEVICE POWER etc.!\n", ncr_name(np
));
8255 spin_unlock_irqrestore(&np
->smp_lock
, flags
);
8263 * The middle-level SCSI driver does not wait for devices to settle.
8264 * Wait synchronously if more than 2 seconds.
8266 if (driver_setup
.settle_delay
> 2) {
8267 printk(KERN_INFO
"%s: waiting %d seconds for scsi devices to settle...\n",
8268 ncr_name(np
), driver_setup
.settle_delay
);
8269 mdelay(1000 * driver_setup
.settle_delay
);
8272 /* start the timeout daemon */
8276 /* use SIMPLE TAG messages by default */
8277 #ifdef SCSI_NCR_ALWAYS_SIMPLE_TAG
8278 np
->order
= SIMPLE_QUEUE_TAG
;
8281 spin_unlock_irqrestore(&np
->smp_lock
, flags
);
8288 printk(KERN_INFO
"%s: detaching...\n", ncr_name(np
));
8292 m_free_dma(np
->scripth0
, sizeof(struct scripth
), "SCRIPTH");
8294 m_free_dma(np
->script0
, sizeof(struct script
), "SCRIPT");
8296 m_free_dma(np
->ccb
, sizeof(struct ccb
), "CCB");
8297 m_free_dma(np
, sizeof(struct ncb
), "NCB");
8298 host_data
->ncb
= NULL
;
8301 scsi_host_put(instance
);
8307 void ncr53c8xx_release(struct Scsi_Host
*host
)
8309 struct host_data
*host_data
= shost_priv(host
);
8310 #ifdef DEBUG_NCR53C8XX
8311 printk("ncr53c8xx: release\n");
8314 ncr_detach(host_data
->ncb
);
8315 scsi_host_put(host
);
8318 static void ncr53c8xx_set_period(struct scsi_target
*starget
, int period
)
8320 struct Scsi_Host
*shost
= dev_to_shost(starget
->dev
.parent
);
8321 struct ncb
*np
= ((struct host_data
*)shost
->hostdata
)->ncb
;
8322 struct tcb
*tp
= &np
->target
[starget
->id
];
8324 if (period
> np
->maxsync
)
8325 period
= np
->maxsync
;
8326 else if (period
< np
->minsync
)
8327 period
= np
->minsync
;
8329 tp
->usrsync
= period
;
8331 ncr_negotiate(np
, tp
);
8334 static void ncr53c8xx_set_offset(struct scsi_target
*starget
, int offset
)
8336 struct Scsi_Host
*shost
= dev_to_shost(starget
->dev
.parent
);
8337 struct ncb
*np
= ((struct host_data
*)shost
->hostdata
)->ncb
;
8338 struct tcb
*tp
= &np
->target
[starget
->id
];
8340 if (offset
> np
->maxoffs
)
8341 offset
= np
->maxoffs
;
8342 else if (offset
< 0)
8345 tp
->maxoffs
= offset
;
8347 ncr_negotiate(np
, tp
);
8350 static void ncr53c8xx_set_width(struct scsi_target
*starget
, int width
)
8352 struct Scsi_Host
*shost
= dev_to_shost(starget
->dev
.parent
);
8353 struct ncb
*np
= ((struct host_data
*)shost
->hostdata
)->ncb
;
8354 struct tcb
*tp
= &np
->target
[starget
->id
];
8356 if (width
> np
->maxwide
)
8357 width
= np
->maxwide
;
8361 tp
->usrwide
= width
;
8363 ncr_negotiate(np
, tp
);
8366 static void ncr53c8xx_get_signalling(struct Scsi_Host
*shost
)
8368 struct ncb
*np
= ((struct host_data
*)shost
->hostdata
)->ncb
;
8369 enum spi_signal_type type
;
8371 switch (np
->scsi_mode
) {
8373 type
= SPI_SIGNAL_SE
;
8376 type
= SPI_SIGNAL_HVD
;
8379 type
= SPI_SIGNAL_UNKNOWN
;
8382 spi_signalling(shost
) = type
;
8385 static struct spi_function_template ncr53c8xx_transport_functions
= {
8386 .set_period
= ncr53c8xx_set_period
,
8388 .set_offset
= ncr53c8xx_set_offset
,
8390 .set_width
= ncr53c8xx_set_width
,
8392 .get_signalling
= ncr53c8xx_get_signalling
,
8395 int __init
ncr53c8xx_init(void)
8397 ncr53c8xx_transport_template
= spi_attach_transport(&ncr53c8xx_transport_functions
);
8398 if (!ncr53c8xx_transport_template
)
8403 void ncr53c8xx_exit(void)
8405 spi_release_transport(ncr53c8xx_transport_template
);