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 struct scsi_cmnd *retrieve_from_waiting_list(int to_remove, struct ncb *np, struct scsi_cmnd *cmd);
1943 static void process_waiting_list(struct ncb *np, int sts);
1945 #define remove_from_waiting_list(np, cmd) \
1946 retrieve_from_waiting_list(1, (np), (cmd))
1947 #define requeue_waiting_list(np) process_waiting_list((np), DID_OK)
1948 #define reset_waiting_list(np) process_waiting_list((np), DID_RESET)
1950 static inline char *ncr_name (struct ncb *np)
1952 return np->inst_name;
1956 /*==========================================================
1959 ** Scripts for NCR-Processor.
1961 ** Use ncr_script_bind for binding to physical addresses.
1964 **==========================================================
1966 ** NADDR generates a reference to a field of the controller data.
1967 ** PADDR generates a reference to another part of the script.
1968 ** RADDR generates a reference to a script processor register.
1969 ** FADDR generates a reference to a script processor register
1972 **----------------------------------------------------------
1975 #define RELOC_SOFTC 0x40000000
1976 #define RELOC_LABEL 0x50000000
1977 #define RELOC_REGISTER 0x60000000
1978 #define RELOC_LABELH 0x80000000
1979 #define RELOC_MASK 0xf0000000
1981 #define NADDR(label) (RELOC_SOFTC | offsetof(struct ncb, label))
1982 #define PADDR(label) (RELOC_LABEL | offsetof(struct script, label))
1983 #define PADDRH(label) (RELOC_LABELH | offsetof(struct scripth, label))
1984 #define RADDR(label) (RELOC_REGISTER | REG(label))
1985 #define FADDR(label,ofs)(RELOC_REGISTER | ((REG(label))+(ofs)))
1988 static struct script script0 __initdata = {
1989 /*--------------------------< START >-----------------------*/ {
1991 ** This NOP will be patched with LED ON
1992 ** SCR_REG_REG (gpreg, SCR_AND, 0xfe)
1999 SCR_FROM_REG (ctest2),
2002 ** Then jump to a certain point in tryloop.
2003 ** Due to the lack of indirect addressing the code
2004 ** is self modifying here.
2007 }/*-------------------------< STARTPOS >--------------------*/,{
2010 }/*-------------------------< SELECT >----------------------*/,{
2012 ** DSA contains the address of a scheduled
2015 ** SCRATCHA contains the address of the script,
2016 ** which starts the next entry.
2018 ** Set Initiator mode.
2020 ** (Target mode is left as an exercise for the reader)
2025 SCR_LOAD_REG (HS_REG, HS_SELECTING),
2029 ** And try to select this target.
2031 SCR_SEL_TBL_ATN ^ offsetof (struct dsb, select),
2034 }/*-------------------------< SELECT2 >----------------------*/,{
2036 ** Now there are 4 possibilities:
2038 ** (1) The ncr loses arbitration.
2039 ** This is ok, because it will try again,
2040 ** when the bus becomes idle.
2041 ** (But beware of the timeout function!)
2043 ** (2) The ncr is reselected.
2044 ** Then the script processor takes the jump
2045 ** to the RESELECT label.
2047 ** (3) The ncr wins arbitration.
2048 ** Then it will execute SCRIPTS instruction until
2049 ** the next instruction that checks SCSI phase.
2050 ** Then will stop and wait for selection to be
2051 ** complete or selection time-out to occur.
2052 ** As a result the SCRIPTS instructions until
2053 ** LOADPOS + 2 should be executed in parallel with
2054 ** the SCSI core performing selection.
2058 ** The MESSAGE_REJECT problem seems to be due to a selection
2060 ** Wait immediately for the selection to complete.
2061 ** (2.5x behaves so)
2063 SCR_JUMPR ^ IFFALSE (WHEN (SCR_MSG_OUT)),
2067 ** Next time use the next slot.
2073 ** The ncr doesn't have an indirect load
2074 ** or store command. So we have to
2075 ** copy part of the control block to a
2076 ** fixed place, where we can access it.
2078 ** We patch the address part of a
2079 ** COPY command with the DSA-register.
2085 ** Flush script prefetch if required
2089 ** then we do the actual copy.
2091 SCR_COPY (sizeof (struct head)),
2093 ** continued after the next label ...
2095 }/*-------------------------< LOADPOS >---------------------*/,{
2099 ** Wait for the next phase or the selection
2100 ** to complete or time-out.
2102 SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_OUT)),
2105 }/*-------------------------< SEND_IDENT >----------------------*/,{
2107 ** Selection complete.
2108 ** Send the IDENTIFY and SIMPLE_TAG messages
2109 ** (and the EXTENDED_SDTR message)
2111 SCR_MOVE_TBL ^ SCR_MSG_OUT,
2112 offsetof (struct dsb, smsg),
2113 SCR_JUMP ^ IFTRUE (WHEN (SCR_MSG_OUT)),
2114 PADDRH (resend_ident),
2115 SCR_LOAD_REG (scratcha, 0x80),
2120 }/*-------------------------< PREPARE >----------------------*/,{
2122 ** load the savep (saved pointer) into
2123 ** the TEMP register (actual pointer)
2126 NADDR (header.savep),
2129 ** Initialize the status registers
2132 NADDR (header.status),
2134 }/*-------------------------< PREPARE2 >---------------------*/,{
2136 ** Initialize the msgout buffer with a NOOP message.
2138 SCR_LOAD_REG (scratcha, NOP),
2144 ** Anticipate the COMMAND phase.
2145 ** This is the normal case for initial selection.
2147 SCR_JUMP ^ IFFALSE (WHEN (SCR_COMMAND)),
2150 }/*-------------------------< COMMAND >--------------------*/,{
2152 ** ... and send the command
2154 SCR_MOVE_TBL ^ SCR_COMMAND,
2155 offsetof (struct dsb, cmd),
2157 ** If status is still HS_NEGOTIATE, negotiation failed.
2158 ** We check this here, since we want to do that
2161 SCR_FROM_REG (HS_REG),
2163 SCR_INT ^ IFTRUE (DATA (HS_NEGOTIATE)),
2166 }/*-----------------------< DISPATCH >----------------------*/,{
2168 ** MSG_IN is the only phase that shall be
2169 ** entered at least once for each (re)selection.
2170 ** So we test it first.
2172 SCR_JUMP ^ IFTRUE (WHEN (SCR_MSG_IN)),
2175 SCR_RETURN ^ IFTRUE (IF (SCR_DATA_OUT)),
2178 ** DEL 397 - 53C875 Rev 3 - Part Number 609-0392410 - ITEM 4.
2179 ** Possible data corruption during Memory Write and Invalidate.
2180 ** This work-around resets the addressing logic prior to the
2181 ** start of the first MOVE of a DATA IN phase.
2182 ** (See Documentation/scsi/ncr53c8xx.rst for more information)
2184 SCR_JUMPR ^ IFFALSE (IF (SCR_DATA_IN)),
2191 SCR_JUMP ^ IFTRUE (IF (SCR_STATUS)),
2193 SCR_JUMP ^ IFTRUE (IF (SCR_COMMAND)),
2195 SCR_JUMP ^ IFTRUE (IF (SCR_MSG_OUT)),
2198 ** Discard one illegal phase byte, if required.
2200 SCR_LOAD_REG (scratcha, XE_BAD_PHASE),
2205 SCR_JUMPR ^ IFFALSE (IF (SCR_ILG_OUT)),
2207 SCR_MOVE_ABS (1) ^ SCR_ILG_OUT,
2209 SCR_JUMPR ^ IFFALSE (IF (SCR_ILG_IN)),
2211 SCR_MOVE_ABS (1) ^ SCR_ILG_IN,
2216 }/*-------------------------< CLRACK >----------------------*/,{
2218 ** Terminate possible pending message phase.
2225 }/*-------------------------< NO_DATA >--------------------*/,{
2227 ** The target wants to tranfer too much data
2228 ** or in the wrong direction.
2229 ** Remember that in extended error.
2231 SCR_LOAD_REG (scratcha, XE_EXTRA_DATA),
2237 ** Discard one data byte, if required.
2239 SCR_JUMPR ^ IFFALSE (WHEN (SCR_DATA_OUT)),
2241 SCR_MOVE_ABS (1) ^ SCR_DATA_OUT,
2243 SCR_JUMPR ^ IFFALSE (IF (SCR_DATA_IN)),
2245 SCR_MOVE_ABS (1) ^ SCR_DATA_IN,
2248 ** .. and repeat as required.
2255 }/*-------------------------< STATUS >--------------------*/,{
2259 SCR_MOVE_ABS (1) ^ SCR_STATUS,
2262 ** save status to scsi_status.
2263 ** mark as complete.
2265 SCR_TO_REG (SS_REG),
2267 SCR_LOAD_REG (HS_REG, HS_COMPLETE),
2271 }/*-------------------------< MSG_IN >--------------------*/,{
2273 ** Get the first byte of the message
2274 ** and save it to SCRATCHA.
2276 ** The script processor doesn't negate the
2277 ** ACK signal after this transfer.
2279 SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
2281 }/*-------------------------< MSG_IN2 >--------------------*/,{
2283 ** Handle this message.
2285 SCR_JUMP ^ IFTRUE (DATA (COMMAND_COMPLETE)),
2287 SCR_JUMP ^ IFTRUE (DATA (DISCONNECT)),
2289 SCR_JUMP ^ IFTRUE (DATA (SAVE_POINTERS)),
2291 SCR_JUMP ^ IFTRUE (DATA (RESTORE_POINTERS)),
2293 SCR_JUMP ^ IFTRUE (DATA (EXTENDED_MESSAGE)),
2294 PADDRH (msg_extended),
2295 SCR_JUMP ^ IFTRUE (DATA (NOP)),
2297 SCR_JUMP ^ IFTRUE (DATA (MESSAGE_REJECT)),
2298 PADDRH (msg_reject),
2299 SCR_JUMP ^ IFTRUE (DATA (IGNORE_WIDE_RESIDUE)),
2300 PADDRH (msg_ign_residue),
2302 ** Rest of the messages left as
2305 ** Unimplemented messages:
2306 ** fall through to MSG_BAD.
2308 }/*-------------------------< MSG_BAD >------------------*/,{
2310 ** unimplemented message - reject it.
2314 SCR_LOAD_REG (scratcha, MESSAGE_REJECT),
2316 }/*-------------------------< SETMSG >----------------------*/,{
2324 }/*-------------------------< CLEANUP >-------------------*/,{
2326 ** dsa: Pointer to ccb
2327 ** or xxxxxxFF (no ccb)
2329 ** HS_REG: Host-Status (<>0!)
2333 SCR_JUMP ^ IFTRUE (DATA (0xff)),
2337 ** complete the cleanup.
2342 }/*-------------------------< COMPLETE >-----------------*/,{
2344 ** Complete message.
2346 ** Copy TEMP register to LASTP in header.
2350 NADDR (header.lastp),
2352 ** When we terminate the cycle by clearing ACK,
2353 ** the target may disconnect immediately.
2355 ** We don't want to be told of an
2356 ** "unexpected disconnect",
2357 ** so we disable this feature.
2359 SCR_REG_REG (scntl2, SCR_AND, 0x7f),
2362 ** Terminate cycle ...
2364 SCR_CLR (SCR_ACK|SCR_ATN),
2367 ** ... and wait for the disconnect.
2371 }/*-------------------------< CLEANUP_OK >----------------*/,{
2373 ** Save host status to header.
2377 NADDR (header.status),
2379 ** and copy back the header to the ccb.
2385 ** Flush script prefetch if required
2388 SCR_COPY (sizeof (struct head)),
2390 }/*-------------------------< CLEANUP0 >--------------------*/,{
2392 }/*-------------------------< SIGNAL >----------------------*/,{
2394 ** if job not completed ...
2396 SCR_FROM_REG (HS_REG),
2399 ** ... start the next command.
2401 SCR_JUMP ^ IFTRUE (MASK (0, (HS_DONEMASK|HS_SKIPMASK))),
2404 ** If command resulted in not GOOD status,
2405 ** call the C code if needed.
2407 SCR_FROM_REG (SS_REG),
2409 SCR_CALL ^ IFFALSE (DATA (SAM_STAT_GOOD)),
2410 PADDRH (bad_status),
2412 #ifndef SCSI_NCR_CCB_DONE_SUPPORT
2415 ** ... signal completion to the host
2420 ** Auf zu neuen Schandtaten!
2425 #else /* defined SCSI_NCR_CCB_DONE_SUPPORT */
2428 ** ... signal completion to the host
2431 }/*------------------------< DONE_POS >---------------------*/,{
2432 PADDRH (done_queue),
2433 }/*------------------------< DONE_PLUG >--------------------*/,{
2436 }/*------------------------< DONE_END >---------------------*/,{
2445 #endif /* SCSI_NCR_CCB_DONE_SUPPORT */
2447 }/*-------------------------< SAVE_DP >------------------*/,{
2450 ** Copy TEMP register to SAVEP in header.
2454 NADDR (header.savep),
2459 }/*-------------------------< RESTORE_DP >---------------*/,{
2461 ** RESTORE_DP message:
2462 ** Copy SAVEP in header to TEMP register.
2465 NADDR (header.savep),
2470 }/*-------------------------< DISCONNECT >---------------*/,{
2472 ** DISCONNECTing ...
2474 ** disable the "unexpected disconnect" feature,
2475 ** and remove the ACK signal.
2477 SCR_REG_REG (scntl2, SCR_AND, 0x7f),
2479 SCR_CLR (SCR_ACK|SCR_ATN),
2482 ** Wait for the disconnect.
2487 ** Status is: DISCONNECTED.
2489 SCR_LOAD_REG (HS_REG, HS_DISCONNECT),
2494 }/*-------------------------< MSG_OUT >-------------------*/,{
2496 ** The target requests a message.
2498 SCR_MOVE_ABS (1) ^ SCR_MSG_OUT,
2504 ** If it was no ABORT message ...
2506 SCR_JUMP ^ IFTRUE (DATA (ABORT_TASK_SET)),
2507 PADDRH (msg_out_abort),
2509 ** ... wait for the next phase
2510 ** if it's a message out, send it again, ...
2512 SCR_JUMP ^ IFTRUE (WHEN (SCR_MSG_OUT)),
2514 }/*-------------------------< MSG_OUT_DONE >--------------*/,{
2516 ** ... else clear the message ...
2518 SCR_LOAD_REG (scratcha, NOP),
2524 ** ... and process the next phase
2528 }/*-------------------------< IDLE >------------------------*/,{
2531 ** Wait for reselect.
2532 ** This NOP will be patched with LED OFF
2533 ** SCR_REG_REG (gpreg, SCR_OR, 0x01)
2537 }/*-------------------------< RESELECT >--------------------*/,{
2539 ** make the DSA invalid.
2541 SCR_LOAD_REG (dsa, 0xff),
2545 SCR_LOAD_REG (HS_REG, HS_IN_RESELECT),
2548 ** Sleep waiting for a reselection.
2549 ** If SIGP is set, special treatment.
2551 ** Zu allem bereit ..
2555 }/*-------------------------< RESELECTED >------------------*/,{
2557 ** This NOP will be patched with LED ON
2558 ** SCR_REG_REG (gpreg, SCR_AND, 0xfe)
2563 ** ... zu nichts zu gebrauchen ?
2565 ** load the target id into the SFBR
2566 ** and jump to the control block.
2568 ** Look at the declarations of
2573 ** to understand what's going on.
2575 SCR_REG_SFBR (ssid, SCR_AND, 0x8F),
2582 }/*-------------------------< RESEL_DSA >-------------------*/,{
2584 ** Ack the IDENTIFY or TAG previously received.
2589 ** The ncr doesn't have an indirect load
2590 ** or store command. So we have to
2591 ** copy part of the control block to a
2592 ** fixed place, where we can access it.
2594 ** We patch the address part of a
2595 ** COPY command with the DSA-register.
2601 ** Flush script prefetch if required
2605 ** then we do the actual copy.
2607 SCR_COPY (sizeof (struct head)),
2609 ** continued after the next label ...
2612 }/*-------------------------< LOADPOS1 >-------------------*/,{
2616 ** The DSA contains the data structure address.
2621 }/*-------------------------< RESEL_LUN >-------------------*/,{
2623 ** come back to this point
2624 ** to get an IDENTIFY message
2625 ** Wait for a msg_in phase.
2627 SCR_INT ^ IFFALSE (WHEN (SCR_MSG_IN)),
2628 SIR_RESEL_NO_MSG_IN,
2631 ** Read the data directly from the BUS DATA lines.
2632 ** This helps to support very old SCSI devices that
2633 ** may reselect without sending an IDENTIFY.
2635 SCR_FROM_REG (sbdl),
2638 ** It should be an Identify message.
2642 }/*-------------------------< RESEL_TAG >-------------------*/,{
2644 ** Read IDENTIFY + SIMPLE + TAG using a single MOVE.
2645 ** Aggressive optimization, is'nt it?
2646 ** No need to test the SIMPLE TAG message, since the
2647 ** driver only supports conformant devices for tags. ;-)
2649 SCR_MOVE_ABS (3) ^ SCR_MSG_IN,
2652 ** Read the TAG from the SIDL.
2653 ** Still an aggressive optimization. ;-)
2654 ** Compute the CCB indirect jump address which
2655 ** is (#TAG*2 & 0xfc) due to tag numbering using
2656 ** 1,3,5..MAXTAGS*2+1 actual values.
2658 SCR_REG_SFBR (sidl, SCR_SHL, 0),
2660 SCR_SFBR_REG (temp, SCR_AND, 0xfc),
2662 }/*-------------------------< JUMP_TO_NEXUS >-------------------*/,{
2665 PADDR (nexus_indirect),
2667 ** Flush script prefetch if required
2671 }/*-------------------------< NEXUS_INDIRECT >-------------------*/,{
2676 }/*-------------------------< RESEL_NOTAG >-------------------*/,{
2679 ** Read an throw away the IDENTIFY.
2681 SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
2684 PADDR (jump_to_nexus),
2685 }/*-------------------------< DATA_IN >--------------------*/,{
2687 ** Because the size depends on the
2688 ** #define MAX_SCATTERL parameter,
2689 ** it is filled in at runtime.
2691 ** ##===========< i=0; i<MAX_SCATTERL >=========
2692 ** || SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_IN)),
2693 ** || PADDR (dispatch),
2694 ** || SCR_MOVE_TBL ^ SCR_DATA_IN,
2695 ** || offsetof (struct dsb, data[ i]),
2696 ** ##==========================================
2698 **---------------------------------------------------------
2701 }/*-------------------------< DATA_IN2 >-------------------*/,{
2706 }/*-------------------------< DATA_OUT >--------------------*/,{
2708 ** Because the size depends on the
2709 ** #define MAX_SCATTERL parameter,
2710 ** it is filled in at runtime.
2712 ** ##===========< i=0; i<MAX_SCATTERL >=========
2713 ** || SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_OUT)),
2714 ** || PADDR (dispatch),
2715 ** || SCR_MOVE_TBL ^ SCR_DATA_OUT,
2716 ** || offsetof (struct dsb, data[ i]),
2717 ** ##==========================================
2719 **---------------------------------------------------------
2722 }/*-------------------------< DATA_OUT2 >-------------------*/,{
2727 }/*--------------------------------------------------------*/
2730 static struct scripth scripth0 __initdata = {
2731 /*-------------------------< TRYLOOP >---------------------*/{
2733 ** Start the next entry.
2734 ** Called addresses point to the launch script in the CCB.
2735 ** They are patched by the main processor.
2737 ** Because the size depends on the
2738 ** #define MAX_START parameter, it is filled
2741 **-----------------------------------------------------------
2743 ** ##===========< I=0; i<MAX_START >===========
2746 ** ##==========================================
2748 **-----------------------------------------------------------
2751 }/*------------------------< TRYLOOP2 >---------------------*/,{
2755 #ifdef SCSI_NCR_CCB_DONE_SUPPORT
2757 }/*------------------------< DONE_QUEUE >-------------------*/,{
2759 ** Copy the CCB address to the next done entry.
2760 ** Because the size depends on the
2761 ** #define MAX_DONE parameter, it is filled
2764 **-----------------------------------------------------------
2766 ** ##===========< I=0; i<MAX_DONE >===========
2767 ** || SCR_COPY (sizeof(struct ccb *),
2768 ** || NADDR (header.cp),
2769 ** || NADDR (ccb_done[i]),
2771 ** || PADDR (done_end),
2772 ** ##==========================================
2774 **-----------------------------------------------------------
2777 }/*------------------------< DONE_QUEUE2 >------------------*/,{
2779 PADDRH (done_queue),
2781 #endif /* SCSI_NCR_CCB_DONE_SUPPORT */
2782 }/*------------------------< SELECT_NO_ATN >-----------------*/,{
2784 ** Set Initiator mode.
2785 ** And try to select this target without ATN.
2790 SCR_LOAD_REG (HS_REG, HS_SELECTING),
2792 SCR_SEL_TBL ^ offsetof (struct dsb, select),
2797 }/*-------------------------< CANCEL >------------------------*/,{
2799 SCR_LOAD_REG (scratcha, HS_ABORTED),
2803 }/*-------------------------< SKIP >------------------------*/,{
2804 SCR_LOAD_REG (scratcha, 0),
2807 ** This entry has been canceled.
2808 ** Next time use the next slot.
2814 ** The ncr doesn't have an indirect load
2815 ** or store command. So we have to
2816 ** copy part of the control block to a
2817 ** fixed place, where we can access it.
2819 ** We patch the address part of a
2820 ** COPY command with the DSA-register.
2826 ** Flush script prefetch if required
2830 ** then we do the actual copy.
2832 SCR_COPY (sizeof (struct head)),
2834 ** continued after the next label ...
2836 }/*-------------------------< SKIP2 >---------------------*/,{
2840 ** Initialize the status registers
2843 NADDR (header.status),
2846 ** Force host status.
2848 SCR_FROM_REG (scratcha),
2850 SCR_JUMPR ^ IFFALSE (MASK (0, HS_DONEMASK)),
2852 SCR_REG_REG (HS_REG, SCR_OR, HS_SKIPMASK),
2856 SCR_TO_REG (HS_REG),
2858 SCR_LOAD_REG (SS_REG, SAM_STAT_GOOD),
2863 },/*-------------------------< PAR_ERR_DATA_IN >---------------*/{
2865 ** Ignore all data in byte, until next phase
2867 SCR_JUMP ^ IFFALSE (WHEN (SCR_DATA_IN)),
2868 PADDRH (par_err_other),
2869 SCR_MOVE_ABS (1) ^ SCR_DATA_IN,
2873 },/*-------------------------< PAR_ERR_OTHER >------------------*/{
2877 SCR_REG_REG (PS_REG, SCR_ADD, 0x01),
2880 ** jump to dispatcher.
2884 }/*-------------------------< MSG_REJECT >---------------*/,{
2886 ** If a negotiation was in progress,
2887 ** negotiation failed.
2888 ** Otherwise, let the C code print
2891 SCR_FROM_REG (HS_REG),
2893 SCR_INT ^ IFFALSE (DATA (HS_NEGOTIATE)),
2894 SIR_REJECT_RECEIVED,
2895 SCR_INT ^ IFTRUE (DATA (HS_NEGOTIATE)),
2900 }/*-------------------------< MSG_IGN_RESIDUE >----------*/,{
2906 SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)),
2909 ** get residue size.
2911 SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
2914 ** Size is 0 .. ignore message.
2916 SCR_JUMP ^ IFTRUE (DATA (0)),
2919 ** Size is not 1 .. have to interrupt.
2921 SCR_JUMPR ^ IFFALSE (DATA (1)),
2924 ** Check for residue byte in swide register
2926 SCR_FROM_REG (scntl2),
2928 SCR_JUMPR ^ IFFALSE (MASK (WSR, WSR)),
2931 ** There IS data in the swide register.
2934 SCR_REG_REG (scntl2, SCR_OR, WSR),
2939 ** Load again the size to the sfbr register.
2941 SCR_FROM_REG (scratcha),
2948 }/*-------------------------< MSG_EXTENDED >-------------*/,{
2954 SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)),
2959 SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
2963 SCR_JUMP ^ IFTRUE (DATA (3)),
2965 SCR_JUMP ^ IFFALSE (DATA (2)),
2967 }/*-------------------------< MSG_EXT_2 >----------------*/,{
2970 SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)),
2973 ** get extended message code.
2975 SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
2977 SCR_JUMP ^ IFTRUE (DATA (EXTENDED_WDTR)),
2980 ** unknown extended message
2984 }/*-------------------------< MSG_WDTR >-----------------*/,{
2987 SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)),
2990 ** get data bus width
2992 SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
2995 ** let the host do the real work.
3000 ** let the target fetch our answer.
3006 SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_OUT)),
3007 PADDRH (nego_bad_phase),
3009 }/*-------------------------< SEND_WDTR >----------------*/,{
3011 ** Send the EXTENDED_WDTR
3013 SCR_MOVE_ABS (4) ^ SCR_MSG_OUT,
3019 PADDR (msg_out_done),
3021 }/*-------------------------< MSG_EXT_3 >----------------*/,{
3024 SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)),
3027 ** get extended message code.
3029 SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
3031 SCR_JUMP ^ IFTRUE (DATA (EXTENDED_SDTR)),
3034 ** unknown extended message
3039 }/*-------------------------< MSG_SDTR >-----------------*/,{
3042 SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)),
3045 ** get period and offset
3047 SCR_MOVE_ABS (2) ^ SCR_MSG_IN,
3050 ** let the host do the real work.
3055 ** let the target fetch our answer.
3061 SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_OUT)),
3062 PADDRH (nego_bad_phase),
3064 }/*-------------------------< SEND_SDTR >-------------*/,{
3066 ** Send the EXTENDED_SDTR
3068 SCR_MOVE_ABS (5) ^ SCR_MSG_OUT,
3074 PADDR (msg_out_done),
3076 }/*-------------------------< NEGO_BAD_PHASE >------------*/,{
3082 }/*-------------------------< MSG_OUT_ABORT >-------------*/,{
3084 ** After ABORT message,
3086 ** expect an immediate disconnect, ...
3088 SCR_REG_REG (scntl2, SCR_AND, 0x7f),
3090 SCR_CLR (SCR_ACK|SCR_ATN),
3095 ** ... and set the status to "ABORTED"
3097 SCR_LOAD_REG (HS_REG, HS_ABORTED),
3102 }/*-------------------------< HDATA_IN >-------------------*/,{
3104 ** Because the size depends on the
3105 ** #define MAX_SCATTERH parameter,
3106 ** it is filled in at runtime.
3108 ** ##==< i=MAX_SCATTERL; i<MAX_SCATTERL+MAX_SCATTERH >==
3109 ** || SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_IN)),
3110 ** || PADDR (dispatch),
3111 ** || SCR_MOVE_TBL ^ SCR_DATA_IN,
3112 ** || offsetof (struct dsb, data[ i]),
3113 ** ##===================================================
3115 **---------------------------------------------------------
3118 }/*-------------------------< HDATA_IN2 >------------------*/,{
3122 }/*-------------------------< HDATA_OUT >-------------------*/,{
3124 ** Because the size depends on the
3125 ** #define MAX_SCATTERH parameter,
3126 ** it is filled in at runtime.
3128 ** ##==< i=MAX_SCATTERL; i<MAX_SCATTERL+MAX_SCATTERH >==
3129 ** || SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_OUT)),
3130 ** || PADDR (dispatch),
3131 ** || SCR_MOVE_TBL ^ SCR_DATA_OUT,
3132 ** || offsetof (struct dsb, data[ i]),
3133 ** ##===================================================
3135 **---------------------------------------------------------
3138 }/*-------------------------< HDATA_OUT2 >------------------*/,{
3142 }/*-------------------------< RESET >----------------------*/,{
3144 ** Send a TARGET_RESET message if bad IDENTIFY
3145 ** received on reselection.
3147 SCR_LOAD_REG (scratcha, ABORT_TASK),
3150 PADDRH (abort_resel),
3151 }/*-------------------------< ABORTTAG >-------------------*/,{
3153 ** Abort a wrong tag received on reselection.
3155 SCR_LOAD_REG (scratcha, ABORT_TASK),
3158 PADDRH (abort_resel),
3159 }/*-------------------------< ABORT >----------------------*/,{
3161 ** Abort a reselection when no active CCB.
3163 SCR_LOAD_REG (scratcha, ABORT_TASK_SET),
3165 }/*-------------------------< ABORT_RESEL >----------------*/,{
3175 ** we expect an immediate disconnect
3177 SCR_REG_REG (scntl2, SCR_AND, 0x7f),
3179 SCR_MOVE_ABS (1) ^ SCR_MSG_OUT,
3184 SCR_CLR (SCR_ACK|SCR_ATN),
3190 }/*-------------------------< RESEND_IDENT >-------------------*/,{
3192 ** The target stays in MSG OUT phase after having acked
3193 ** Identify [+ Tag [+ Extended message ]]. Targets shall
3194 ** behave this way on parity error.
3195 ** We must send it again all the messages.
3197 SCR_SET (SCR_ATN), /* Shall be asserted 2 deskew delays before the */
3198 0, /* 1rst ACK = 90 ns. Hope the NCR is'nt too fast */
3201 }/*-------------------------< CLRATN_GO_ON >-------------------*/,{
3205 }/*-------------------------< NXTDSP_GO_ON >-------------------*/,{
3207 }/*-------------------------< SDATA_IN >-------------------*/,{
3208 SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_IN)),
3210 SCR_MOVE_TBL ^ SCR_DATA_IN,
3211 offsetof (struct dsb, sense),
3216 }/*-------------------------< DATA_IO >--------------------*/,{
3218 ** We jump here if the data direction was unknown at the
3219 ** time we had to queue the command to the scripts processor.
3220 ** Pointers had been set as follow in this situation:
3221 ** savep --> DATA_IO
3222 ** lastp --> start pointer when DATA_IN
3223 ** goalp --> goal pointer when DATA_IN
3224 ** wlastp --> start pointer when DATA_OUT
3225 ** wgoalp --> goal pointer when DATA_OUT
3226 ** This script sets savep/lastp/goalp according to the
3227 ** direction chosen by the target.
3229 SCR_JUMPR ^ IFTRUE (WHEN (SCR_DATA_OUT)),
3232 ** Direction is DATA IN.
3233 ** Warning: we jump here, even when phase is DATA OUT.
3236 NADDR (header.lastp),
3237 NADDR (header.savep),
3240 ** Jump to the SCRIPTS according to actual direction.
3243 NADDR (header.savep),
3248 ** Direction is DATA OUT.
3251 NADDR (header.wlastp),
3252 NADDR (header.lastp),
3254 NADDR (header.wgoalp),
3255 NADDR (header.goalp),
3258 }/*-------------------------< BAD_IDENTIFY >---------------*/,{
3260 ** If message phase but not an IDENTIFY,
3261 ** get some help from the C code.
3262 ** Old SCSI device may behave so.
3264 SCR_JUMPR ^ IFTRUE (MASK (0x80, 0x80)),
3267 SIR_RESEL_NO_IDENTIFY,
3271 ** Message is an IDENTIFY, but lun is unknown.
3272 ** Read the message, since we got it directly
3273 ** from the SCSI BUS data lines.
3274 ** Signal problem to C code for logging the event.
3275 ** Send an ABORT_TASK_SET to clear all pending tasks.
3279 SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
3283 }/*-------------------------< BAD_I_T_L >------------------*/,{
3285 ** We donnot have a task for that I_T_L.
3286 ** Signal problem to C code for logging the event.
3287 ** Send an ABORT_TASK_SET message.
3290 SIR_RESEL_BAD_I_T_L,
3293 }/*-------------------------< BAD_I_T_L_Q >----------------*/,{
3295 ** We donnot have a task that matches the tag.
3296 ** Signal problem to C code for logging the event.
3297 ** Send an ABORT_TASK message.
3300 SIR_RESEL_BAD_I_T_L_Q,
3303 }/*-------------------------< BAD_TARGET >-----------------*/,{
3305 ** We donnot know the target that reselected us.
3306 ** Grab the first message if any (IDENTIFY).
3307 ** Signal problem to C code for logging the event.
3308 ** TARGET_RESET message.
3311 SIR_RESEL_BAD_TARGET,
3312 SCR_JUMPR ^ IFFALSE (WHEN (SCR_MSG_IN)),
3314 SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
3318 }/*-------------------------< BAD_STATUS >-----------------*/,{
3320 ** If command resulted in either TASK_SET FULL,
3321 ** CHECK CONDITION or COMMAND TERMINATED,
3324 SCR_INT ^ IFTRUE (DATA (SAM_STAT_TASK_SET_FULL)),
3326 SCR_INT ^ IFTRUE (DATA (SAM_STAT_CHECK_CONDITION)),
3328 SCR_INT ^ IFTRUE (DATA (SAM_STAT_COMMAND_TERMINATED)),
3332 }/*-------------------------< START_RAM >-------------------*/,{
3334 ** Load the script into on-chip RAM,
3335 ** and jump to start point.
3339 PADDRH (start_ram0),
3341 ** Flush script prefetch if required
3344 SCR_COPY (sizeof (struct script)),
3345 }/*-------------------------< START_RAM0 >--------------------*/,{
3350 }/*-------------------------< STO_RESTART >-------------------*/,{
3353 ** Repair start queue (e.g. next time use the next slot)
3354 ** and jump to start point.
3361 }/*-------------------------< WAIT_DMA >-------------------*/,{
3363 ** For HP Zalon/53c720 systems, the Zalon interface
3364 ** between CPU and 53c720 does prefetches, which causes
3365 ** problems with self modifying scripts. The problem
3366 ** is overcome by calling a dummy subroutine after each
3367 ** modification, to force a refetch of the script on
3368 ** return from the subroutine.
3372 }/*-------------------------< SNOOPTEST >-------------------*/,{
3374 ** Read the variable.
3380 ** Write the variable.
3386 ** Read back the variable.
3391 }/*-------------------------< SNOOPEND >-------------------*/,{
3397 }/*--------------------------------------------------------*/
3400 /*==========================================================
3403 ** Fill in #define dependent parts of the script
3406 **==========================================================
3409 void __init ncr_script_fill (struct script * scr, struct scripth * scrh)
3415 for (i=0; i<MAX_START; i++) {
3420 BUG_ON((u_long)p != (u_long)&scrh->tryloop + sizeof (scrh->tryloop));
3422 #ifdef SCSI_NCR_CCB_DONE_SUPPORT
3424 p = scrh->done_queue;
3425 for (i = 0; i<MAX_DONE; i++) {
3426 *p++ =SCR_COPY (sizeof(struct ccb *));
3427 *p++ =NADDR (header.cp);
3428 *p++ =NADDR (ccb_done[i]);
3430 *p++ =PADDR (done_end);
3433 BUG_ON((u_long)p != (u_long)&scrh->done_queue+sizeof(scrh->done_queue));
3435 #endif /* SCSI_NCR_CCB_DONE_SUPPORT */
3438 for (i=0; i<MAX_SCATTERH; i++) {
3439 *p++ =SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_IN));
3440 *p++ =PADDR (dispatch);
3441 *p++ =SCR_MOVE_TBL ^ SCR_DATA_IN;
3442 *p++ =offsetof (struct dsb, data[i]);
3445 BUG_ON((u_long)p != (u_long)&scrh->hdata_in + sizeof (scrh->hdata_in));
3448 for (i=MAX_SCATTERH; i<MAX_SCATTERH+MAX_SCATTERL; i++) {
3449 *p++ =SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_IN));
3450 *p++ =PADDR (dispatch);
3451 *p++ =SCR_MOVE_TBL ^ SCR_DATA_IN;
3452 *p++ =offsetof (struct dsb, data[i]);
3455 BUG_ON((u_long)p != (u_long)&scr->data_in + sizeof (scr->data_in));
3457 p = scrh->hdata_out;
3458 for (i=0; i<MAX_SCATTERH; i++) {
3459 *p++ =SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_OUT));
3460 *p++ =PADDR (dispatch);
3461 *p++ =SCR_MOVE_TBL ^ SCR_DATA_OUT;
3462 *p++ =offsetof (struct dsb, data[i]);
3465 BUG_ON((u_long)p != (u_long)&scrh->hdata_out + sizeof (scrh->hdata_out));
3468 for (i=MAX_SCATTERH; i<MAX_SCATTERH+MAX_SCATTERL; i++) {
3469 *p++ =SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_OUT));
3470 *p++ =PADDR (dispatch);
3471 *p++ =SCR_MOVE_TBL ^ SCR_DATA_OUT;
3472 *p++ =offsetof (struct dsb, data[i]);
3475 BUG_ON((u_long) p != (u_long)&scr->data_out + sizeof (scr->data_out));
3478 /*==========================================================
3481 ** Copy and rebind a script.
3484 **==========================================================
3488 ncr_script_copy_and_bind (struct ncb *np, ncrcmd *src, ncrcmd *dst, int len)
3490 ncrcmd opcode, new, old, tmp1, tmp2;
3491 ncrcmd *start, *end;
3501 *dst++ = cpu_to_scr(opcode);
3504 ** If we forget to change the length
3505 ** in struct script, a field will be
3506 ** padded with 0. This is an illegal
3511 printk (KERN_ERR "%s: ERROR0 IN SCRIPT at %d.\n",
3512 ncr_name(np), (int) (src-start-1));
3516 if (DEBUG_FLAGS & DEBUG_SCRIPT)
3517 printk (KERN_DEBUG "%p: <%x>\n",
3518 (src-1), (unsigned)opcode);
3521 ** We don't have to decode ALL commands
3523 switch (opcode >> 28) {
3527 ** COPY has TWO arguments.
3532 if ((tmp1 & RELOC_MASK) == RELOC_KVAR)
3537 if ((tmp2 & RELOC_MASK) == RELOC_KVAR)
3540 if ((tmp1 ^ tmp2) & 3) {
3541 printk (KERN_ERR"%s: ERROR1 IN SCRIPT at %d.\n",
3542 ncr_name(np), (int) (src-start-1));
3546 ** If PREFETCH feature not enabled, remove
3547 ** the NO FLUSH bit if present.
3549 if ((opcode & SCR_NO_FLUSH) && !(np->features & FE_PFEN)) {
3550 dst[-1] = cpu_to_scr(opcode & ~SCR_NO_FLUSH);
3557 ** MOVE (absolute address)
3565 ** don't relocate if relative :-)
3567 if (opcode & 0x00800000)
3589 switch (old & RELOC_MASK) {
3590 case RELOC_REGISTER:
3591 new = (old & ~RELOC_MASK) + np->paddr;
3594 new = (old & ~RELOC_MASK) + np->p_script;
3597 new = (old & ~RELOC_MASK) + np->p_scripth;
3600 new = (old & ~RELOC_MASK) + np->p_ncb;
3604 if (((old & ~RELOC_MASK) <
3605 SCRIPT_KVAR_FIRST) ||
3606 ((old & ~RELOC_MASK) >
3608 panic("ncr KVAR out of range");
3609 new = vtophys(script_kvars[old &
3614 /* Don't relocate a 0 address. */
3621 panic("ncr_script_copy_and_bind: weird relocation %x\n", old);
3625 *dst++ = cpu_to_scr(new);
3628 *dst++ = cpu_to_scr(*src++);
3634 ** Linux host data structure
3641 #define PRINT_ADDR(cmd, arg...) dev_info(&cmd->device->sdev_gendev , ## arg)
3643 static void ncr_print_msg(struct ccb *cp, char *label, u_char *msg)
3645 PRINT_ADDR(cp->cmd, "%s: ", label);
3651 /*==========================================================
3653 ** NCR chip clock divisor table.
3654 ** Divisors are multiplied by 10,000,000 in order to make
3655 ** calculations more simple.
3657 **==========================================================
3661 static u_long div_10M[] =
3662 {2*_5M, 3*_5M, 4*_5M, 6*_5M, 8*_5M, 12*_5M, 16*_5M};
3665 /*===============================================================
3667 ** Prepare io register values used by ncr_init() according
3668 ** to selected and supported features.
3670 ** NCR chips allow burst lengths of 2, 4, 8, 16, 32, 64, 128
3671 ** transfers. 32,64,128 are only supported by 875 and 895 chips.
3672 ** We use log base 2 (burst length) as internal code, with
3673 ** value 0 meaning "burst disabled".
3675 **===============================================================
3679 * Burst length from burst code.
3681 #define burst_length(bc) (!(bc))? 0 : 1 << (bc)
3684 * Burst code from io register bits. Burst enable is ctest0 for c720
3686 #define burst_code(dmode, ctest0) \
3687 (ctest0) & 0x80 ? 0 : (((dmode) & 0xc0) >> 6) + 1
3690 * Set initial io register bits from burst code.
3692 static inline void ncr_init_burst(struct ncb *np, u_char bc)
3694 u_char *be = &np->rv_ctest0;
3696 np->rv_dmode &= ~(0x3 << 6);
3697 np->rv_ctest5 &= ~0x4;
3703 np->rv_dmode |= ((bc & 0x3) << 6);
3704 np->rv_ctest5 |= (bc & 0x4);
3708 static void __init ncr_prepare_setting(struct ncb *np)
3715 ** Save assumed BIOS setting
3718 np->sv_scntl0 = INB(nc_scntl0) & 0x0a;
3719 np->sv_scntl3 = INB(nc_scntl3) & 0x07;
3720 np->sv_dmode = INB(nc_dmode) & 0xce;
3721 np->sv_dcntl = INB(nc_dcntl) & 0xa8;
3722 np->sv_ctest0 = INB(nc_ctest0) & 0x84;
3723 np->sv_ctest3 = INB(nc_ctest3) & 0x01;
3724 np->sv_ctest4 = INB(nc_ctest4) & 0x80;
3725 np->sv_ctest5 = INB(nc_ctest5) & 0x24;
3726 np->sv_gpcntl = INB(nc_gpcntl);
3727 np->sv_stest2 = INB(nc_stest2) & 0x20;
3728 np->sv_stest4 = INB(nc_stest4);
3734 np->maxwide = (np->features & FE_WIDE)? 1 : 0;
3737 * Guess the frequency of the chip's clock.
3739 if (np->features & FE_ULTRA)
3740 np->clock_khz = 80000;
3742 np->clock_khz = 40000;
3745 * Get the clock multiplier factor.
3747 if (np->features & FE_QUAD)
3749 else if (np->features & FE_DBLR)
3755 * Measure SCSI clock frequency for chips
3756 * it may vary from assumed one.
3758 if (np->features & FE_VARCLK)
3759 ncr_getclock(np, np->multiplier);
3762 * Divisor to be used for async (timer pre-scaler).
3764 i = np->clock_divn - 1;
3766 if (10ul * SCSI_NCR_MIN_ASYNC * np->clock_khz > div_10M[i]) {
3771 np->rv_scntl3 = i+1;
3774 * Minimum synchronous period factor supported by the chip.
3775 * Btw, 'period' is in tenths of nanoseconds.
3778 period = (4 * div_10M[0] + np->clock_khz - 1) / np->clock_khz;
3779 if (period <= 250) np->minsync = 10;
3780 else if (period <= 303) np->minsync = 11;
3781 else if (period <= 500) np->minsync = 12;
3782 else np->minsync = (period + 40 - 1) / 40;
3785 * Check against chip SCSI standard support (SCSI-2,ULTRA,ULTRA2).
3788 if (np->minsync < 25 && !(np->features & FE_ULTRA))
3792 * Maximum synchronous period factor supported by the chip.
3795 period = (11 * div_10M[np->clock_divn - 1]) / (4 * np->clock_khz);
3796 np->maxsync = period > 2540 ? 254 : period / 10;
3799 ** Prepare initial value of other IO registers
3801 #if defined SCSI_NCR_TRUST_BIOS_SETTING
3802 np->rv_scntl0 = np->sv_scntl0;
3803 np->rv_dmode = np->sv_dmode;
3804 np->rv_dcntl = np->sv_dcntl;
3805 np->rv_ctest0 = np->sv_ctest0;
3806 np->rv_ctest3 = np->sv_ctest3;
3807 np->rv_ctest4 = np->sv_ctest4;
3808 np->rv_ctest5 = np->sv_ctest5;
3809 burst_max = burst_code(np->sv_dmode, np->sv_ctest0);
3813 ** Select burst length (dwords)
3815 burst_max = driver_setup.burst_max;
3816 if (burst_max == 255)
3817 burst_max = burst_code(np->sv_dmode, np->sv_ctest0);
3820 if (burst_max > np->maxburst)
3821 burst_max = np->maxburst;
3824 ** Select all supported special features
3826 if (np->features & FE_ERL)
3827 np->rv_dmode |= ERL; /* Enable Read Line */
3828 if (np->features & FE_BOF)
3829 np->rv_dmode |= BOF; /* Burst Opcode Fetch */
3830 if (np->features & FE_ERMP)
3831 np->rv_dmode |= ERMP; /* Enable Read Multiple */
3832 if (np->features & FE_PFEN)
3833 np->rv_dcntl |= PFEN; /* Prefetch Enable */
3834 if (np->features & FE_CLSE)
3835 np->rv_dcntl |= CLSE; /* Cache Line Size Enable */
3836 if (np->features & FE_WRIE)
3837 np->rv_ctest3 |= WRIE; /* Write and Invalidate */
3838 if (np->features & FE_DFS)
3839 np->rv_ctest5 |= DFS; /* Dma Fifo Size */
3840 if (np->features & FE_MUX)
3841 np->rv_ctest4 |= MUX; /* Host bus multiplex mode */
3842 if (np->features & FE_EA)
3843 np->rv_dcntl |= EA; /* Enable ACK */
3844 if (np->features & FE_EHP)
3845 np->rv_ctest0 |= EHP; /* Even host parity */
3848 ** Select some other
3850 if (driver_setup.master_parity)
3851 np->rv_ctest4 |= MPEE; /* Master parity checking */
3852 if (driver_setup.scsi_parity)
3853 np->rv_scntl0 |= 0x0a; /* full arb., ena parity, par->ATN */
3856 ** Get SCSI addr of host adapter (set by bios?).
3858 if (np->myaddr == 255) {
3859 np->myaddr = INB(nc_scid) & 0x07;
3861 np->myaddr = SCSI_NCR_MYADDR;
3864 #endif /* SCSI_NCR_TRUST_BIOS_SETTING */
3867 * Prepare initial io register bits for burst length
3869 ncr_init_burst(np, burst_max);
3872 ** Set SCSI BUS mode.
3874 ** - ULTRA2 chips (895/895A/896) report the current
3875 ** BUS mode through the STEST4 IO register.
3876 ** - For previous generation chips (825/825A/875),
3877 ** user has to tell us how to check against HVD,
3878 ** since a 100% safe algorithm is not possible.
3880 np->scsi_mode = SMODE_SE;
3881 if (np->features & FE_DIFF) {
3882 switch(driver_setup.diff_support) {
3883 case 4: /* Trust previous settings if present, then GPIO3 */
3884 if (np->sv_scntl3) {
3885 if (np->sv_stest2 & 0x20)
3886 np->scsi_mode = SMODE_HVD;
3890 case 3: /* SYMBIOS controllers report HVD through GPIO3 */
3891 if (INB(nc_gpreg) & 0x08)
3894 case 2: /* Set HVD unconditionally */
3895 np->scsi_mode = SMODE_HVD;
3897 case 1: /* Trust previous settings for HVD */
3898 if (np->sv_stest2 & 0x20)
3899 np->scsi_mode = SMODE_HVD;
3901 default:/* Don't care about HVD */
3905 if (np->scsi_mode == SMODE_HVD)
3906 np->rv_stest2 |= 0x20;
3909 ** Set LED support from SCRIPTS.
3910 ** Ignore this feature for boards known to use a
3911 ** specific GPIO wiring and for the 895A or 896
3912 ** that drive the LED directly.
3913 ** Also probe initial setting of GPIO0 as output.
3915 if ((driver_setup.led_pin) &&
3916 !(np->features & FE_LEDC) && !(np->sv_gpcntl & 0x01))
3917 np->features |= FE_LED0;
3922 switch(driver_setup.irqm & 3) {
3924 np->rv_dcntl |= IRQM;
3927 np->rv_dcntl |= (np->sv_dcntl & IRQM);
3934 ** Configure targets according to driver setup.
3935 ** Allow to override sync, wide and NOSCAN from
3936 ** boot command line.
3938 for (i = 0 ; i < MAX_TARGET ; i++) {
3939 struct tcb *tp = &np->target[i];
3941 tp->usrsync = driver_setup.default_sync;
3942 tp->usrwide = driver_setup.max_wide;
3943 tp->usrtags = MAX_TAGS;
3944 tp->period = 0xffff;
3945 if (!driver_setup.disconnection)
3946 np->target[i].usrflag = UF_NODISC;
3950 ** Announce all that stuff to user.
3953 printk(KERN_INFO "%s: ID %d, Fast-%d%s%s\n", ncr_name(np),
3955 np->minsync < 12 ? 40 : (np->minsync < 25 ? 20 : 10),
3956 (np->rv_scntl0 & 0xa) ? ", Parity Checking" : ", NO Parity",
3957 (np->rv_stest2 & 0x20) ? ", Differential" : "");
3959 if (bootverbose > 1) {
3960 printk (KERN_INFO "%s: initial SCNTL3/DMODE/DCNTL/CTEST3/4/5 = "
3961 "(hex) %02x/%02x/%02x/%02x/%02x/%02x\n",
3962 ncr_name(np), np->sv_scntl3, np->sv_dmode, np->sv_dcntl,
3963 np->sv_ctest3, np->sv_ctest4, np->sv_ctest5);
3965 printk (KERN_INFO "%s: final SCNTL3/DMODE/DCNTL/CTEST3/4/5 = "
3966 "(hex) %02x/%02x/%02x/%02x/%02x/%02x\n",
3967 ncr_name(np), np->rv_scntl3, np->rv_dmode, np->rv_dcntl,
3968 np->rv_ctest3, np->rv_ctest4, np->rv_ctest5);
3971 if (bootverbose && np->paddr2)
3972 printk (KERN_INFO "%s: on-chip RAM at 0x%lx\n",
3973 ncr_name(np), np->paddr2);
3976 /*==========================================================
3979 ** Done SCSI commands list management.
3981 ** We donnot enter the scsi_done() callback immediately
3982 ** after a command has been seen as completed but we
3983 ** insert it into a list which is flushed outside any kind
3984 ** of driver critical section.
3985 ** This allows to do minimal stuff under interrupt and
3986 ** inside critical sections and to also avoid locking up
3987 ** on recursive calls to driver entry points under SMP.
3988 ** In fact, the only kernel point which is entered by the
3989 ** driver with a driver lock set is kmalloc(GFP_ATOMIC)
3990 ** that shall not reenter the driver under any circumstances,
3993 **==========================================================
3995 static inline void ncr_queue_done_cmd(struct ncb *np, struct scsi_cmnd *cmd)
3997 unmap_scsi_data(np, cmd);
3998 cmd->host_scribble = (char *) np->done_list;
3999 np->done_list = cmd;
4002 static inline void ncr_flush_done_cmds(struct scsi_cmnd *lcmd)
4004 struct scsi_cmnd *cmd;
4008 lcmd = (struct scsi_cmnd *) cmd->host_scribble;
4009 cmd->scsi_done(cmd);
4013 /*==========================================================
4016 ** Prepare the next negotiation message if needed.
4018 ** Fill in the part of message buffer that contains the
4019 ** negotiation and the nego_status field of the CCB.
4020 ** Returns the size of the message in bytes.
4023 **==========================================================
4027 static int ncr_prepare_nego(struct ncb *np, struct ccb *cp, u_char *msgptr)
4029 struct tcb *tp = &np->target[cp->target];
4032 struct scsi_target *starget = tp->starget;
4034 /* negotiate wide transfers ? */
4035 if (!tp->widedone) {
4036 if (spi_support_wide(starget)) {
4042 /* negotiate synchronous transfers? */
4043 if (!nego && !tp->period) {
4044 if (spi_support_sync(starget)) {
4048 dev_info(&starget->dev, "target did not report SYNC.\n");
4054 msglen += spi_populate_sync_msg(msgptr + msglen,
4055 tp->maxoffs ? tp->minsync : 0, tp->maxoffs);
4058 msglen += spi_populate_width_msg(msgptr + msglen, tp->usrwide);
4062 cp->nego_status = nego;
4066 if (DEBUG_FLAGS & DEBUG_NEGO) {
4067 ncr_print_msg(cp, nego == NS_WIDE ?
4068 "wide msgout":"sync_msgout", msgptr);
4077 /*==========================================================
4080 ** Start execution of a SCSI command.
4081 ** This is called from the generic SCSI driver.
4084 **==========================================================
4086 static int ncr_queue_command (struct ncb *np, struct scsi_cmnd *cmd)
4088 struct scsi_device *sdev = cmd->device;
4089 struct tcb *tp = &np->target[sdev->id];
4090 struct lcb *lp = tp->lp[sdev->lun];
4094 u_char idmsg, *msgptr;
4099 /*---------------------------------------------
4101 ** Some shortcuts ...
4103 **---------------------------------------------
4105 if ((sdev->id == np->myaddr ) ||
4106 (sdev->id >= MAX_TARGET) ||
4107 (sdev->lun >= MAX_LUN )) {
4108 return(DID_BAD_TARGET);
4111 /*---------------------------------------------
4113 ** Complete the 1st TEST UNIT READY command
4114 ** with error condition if the device is
4115 ** flagged NOSCAN, in order to speed up
4118 **---------------------------------------------
4120 if ((cmd->cmnd[0] == 0 || cmd->cmnd[0] == 0x12) &&
4121 (tp->usrflag & UF_NOSCAN)) {
4122 tp->usrflag &= ~UF_NOSCAN;
4123 return DID_BAD_TARGET;
4126 if (DEBUG_FLAGS & DEBUG_TINY) {
4127 PRINT_ADDR(cmd, "CMD=%x ", cmd->cmnd[0]);
4130 /*---------------------------------------------------
4132 ** Assign a ccb / bind cmd.
4133 ** If resetting, shorten settle_time if necessary
4134 ** in order to avoid spurious timeouts.
4135 ** If resetting or no free ccb,
4136 ** insert cmd into the waiting list.
4138 **----------------------------------------------------
4140 if (np->settle_time && scsi_cmd_to_rq(cmd)->timeout >= HZ) {
4141 u_long tlimit = jiffies + scsi_cmd_to_rq(cmd)->timeout - HZ;
4142 if (time_after(np->settle_time, tlimit))
4143 np->settle_time = tlimit;
4146 if (np->settle_time || !(cp=ncr_get_ccb (np, cmd))) {
4147 insert_into_waiting_list(np, cmd);
4152 /*----------------------------------------------------
4154 ** Build the identify / tag / sdtr message
4156 **----------------------------------------------------
4159 idmsg = IDENTIFY(0, sdev->lun);
4161 if (cp ->tag != NO_TAG ||
4162 (cp != np->ccb && np->disc && !(tp->usrflag & UF_NODISC)))
4165 msgptr = cp->scsi_smsg;
4167 msgptr[msglen++] = idmsg;
4169 if (cp->tag != NO_TAG) {
4170 char order = np->order;
4173 ** Force ordered tag if necessary to avoid timeouts
4174 ** and to preserve interactivity.
4176 if (lp && time_after(jiffies, lp->tags_stime)) {
4177 if (lp->tags_smap) {
4178 order = ORDERED_QUEUE_TAG;
4179 if ((DEBUG_FLAGS & DEBUG_TAGS)||bootverbose>2){
4181 "ordered tag forced.\n");
4184 lp->tags_stime = jiffies + 3*HZ;
4185 lp->tags_smap = lp->tags_umap;
4190 ** Ordered write ops, unordered read ops.
4192 switch (cmd->cmnd[0]) {
4193 case 0x08: /* READ_SMALL (6) */
4194 case 0x28: /* READ_BIG (10) */
4195 case 0xa8: /* READ_HUGE (12) */
4196 order = SIMPLE_QUEUE_TAG;
4199 order = ORDERED_QUEUE_TAG;
4202 msgptr[msglen++] = order;
4204 ** Actual tags are numbered 1,3,5,..2*MAXTAGS+1,
4205 ** since we may have to deal with devices that have
4206 ** problems with #TAG 0 or too great #TAG numbers.
4208 msgptr[msglen++] = (cp->tag << 1) + 1;
4211 /*----------------------------------------------------
4213 ** Build the data descriptors
4215 **----------------------------------------------------
4218 direction = cmd->sc_data_direction;
4219 if (direction != DMA_NONE) {
4220 segments = ncr_scatter(np, cp, cp->cmd);
4222 ncr_free_ccb(np, cp);
4231 /*---------------------------------------------------
4233 ** negotiation required?
4235 ** (nego_status is filled by ncr_prepare_nego())
4237 **---------------------------------------------------
4240 cp->nego_status = 0;
4242 if ((!tp->widedone || !tp->period) && !tp->nego_cp && lp) {
4243 msglen += ncr_prepare_nego (np, cp, msgptr + msglen);
4246 /*----------------------------------------------------
4248 ** Determine xfer direction.
4250 **----------------------------------------------------
4253 direction = DMA_NONE;
4256 ** If data direction is BIDIRECTIONAL, speculate FROM_DEVICE
4257 ** but prepare alternate pointers for TO_DEVICE in case
4258 ** of our speculation will be just wrong.
4259 ** SCRIPTS will swap values if needed.
4262 case DMA_BIDIRECTIONAL:
4264 goalp = NCB_SCRIPT_PHYS (np, data_out2) + 8;
4265 if (segments <= MAX_SCATTERL)
4266 lastp = goalp - 8 - (segments * 16);
4268 lastp = NCB_SCRIPTH_PHYS (np, hdata_out2);
4269 lastp -= (segments - MAX_SCATTERL) * 16;
4271 if (direction != DMA_BIDIRECTIONAL)
4273 cp->phys.header.wgoalp = cpu_to_scr(goalp);
4274 cp->phys.header.wlastp = cpu_to_scr(lastp);
4276 case DMA_FROM_DEVICE:
4277 goalp = NCB_SCRIPT_PHYS (np, data_in2) + 8;
4278 if (segments <= MAX_SCATTERL)
4279 lastp = goalp - 8 - (segments * 16);
4281 lastp = NCB_SCRIPTH_PHYS (np, hdata_in2);
4282 lastp -= (segments - MAX_SCATTERL) * 16;
4287 lastp = goalp = NCB_SCRIPT_PHYS (np, no_data);
4292 ** Set all pointers values needed by SCRIPTS.
4293 ** If direction is unknown, start at data_io.
4295 cp->phys.header.lastp = cpu_to_scr(lastp);
4296 cp->phys.header.goalp = cpu_to_scr(goalp);
4298 if (direction == DMA_BIDIRECTIONAL)
4299 cp->phys.header.savep =
4300 cpu_to_scr(NCB_SCRIPTH_PHYS (np, data_io));
4302 cp->phys.header.savep= cpu_to_scr(lastp);
4305 ** Save the initial data pointer in order to be able
4306 ** to redo the command.
4308 cp->startp = cp->phys.header.savep;
4310 /*----------------------------------------------------
4314 **----------------------------------------------------
4317 ** physical -> virtual backlink
4318 ** Generic SCSI command
4324 cp->start.schedule.l_paddr = cpu_to_scr(NCB_SCRIPT_PHYS (np, select));
4325 cp->restart.schedule.l_paddr = cpu_to_scr(NCB_SCRIPT_PHYS (np, resel_dsa));
4329 cp->phys.select.sel_id = sdev_id(sdev);
4330 cp->phys.select.sel_scntl3 = tp->wval;
4331 cp->phys.select.sel_sxfer = tp->sval;
4335 cp->phys.smsg.addr = cpu_to_scr(CCB_PHYS (cp, scsi_smsg));
4336 cp->phys.smsg.size = cpu_to_scr(msglen);
4341 memcpy(cp->cdb_buf, cmd->cmnd, min_t(int, cmd->cmd_len, sizeof(cp->cdb_buf)));
4342 cp->phys.cmd.addr = cpu_to_scr(CCB_PHYS (cp, cdb_buf[0]));
4343 cp->phys.cmd.size = cpu_to_scr(cmd->cmd_len);
4348 cp->actualquirks = 0;
4349 cp->host_status = cp->nego_status ? HS_NEGOTIATE : HS_BUSY;
4350 cp->scsi_status = SAM_STAT_ILLEGAL;
4351 cp->parity_status = 0;
4353 cp->xerr_status = XE_OK;
4355 /*----------------------------------------------------
4357 ** Critical region: start this job.
4359 **----------------------------------------------------
4362 /* activate this job. */
4363 cp->magic = CCB_MAGIC;
4366 ** insert next CCBs into start queue.
4367 ** 2 max at a time is enough to flush the CCB wait queue.
4371 ncr_start_next_ccb(np, lp, 2);
4373 ncr_put_start_queue(np, cp);
4375 /* Command is successfully queued. */
4381 /*==========================================================
4384 ** Insert a CCB into the start queue and wake up the
4385 ** SCRIPTS processor.
4388 **==========================================================
4391 static void ncr_start_next_ccb(struct ncb *np, struct lcb *lp, int maxn)
4393 struct list_head *qp;
4399 while (maxn-- && lp->queuedccbs < lp->queuedepth) {
4400 qp = ncr_list_pop(&lp->wait_ccbq);
4404 cp = list_entry(qp, struct ccb, link_ccbq);
4405 list_add_tail(qp, &lp->busy_ccbq);
4406 lp->jump_ccb[cp->tag == NO_TAG ? 0 : cp->tag] =
4407 cpu_to_scr(CCB_PHYS (cp, restart));
4408 ncr_put_start_queue(np, cp);
4412 static void ncr_put_start_queue(struct ncb *np, struct ccb *cp)
4417 ** insert into start queue.
4419 if (!np->squeueput) np->squeueput = 1;
4420 qidx = np->squeueput + 2;
4421 if (qidx >= MAX_START + MAX_START) qidx = 1;
4423 np->scripth->tryloop [qidx] = cpu_to_scr(NCB_SCRIPT_PHYS (np, idle));
4425 np->scripth->tryloop [np->squeueput] = cpu_to_scr(CCB_PHYS (cp, start));
4427 np->squeueput = qidx;
4431 if (DEBUG_FLAGS & DEBUG_QUEUE)
4432 printk ("%s: queuepos=%d.\n", ncr_name (np), np->squeueput);
4435 ** Script processor may be waiting for reselect.
4439 OUTB (nc_istat, SIGP);
4443 static int ncr_reset_scsi_bus(struct ncb *np, int enab_int, int settle_delay)
4448 np->settle_time = jiffies + settle_delay * HZ;
4450 if (bootverbose > 1)
4451 printk("%s: resetting, "
4452 "command processing suspended for %d seconds\n",
4453 ncr_name(np), settle_delay);
4455 ncr_chip_reset(np, 100);
4456 udelay(2000); /* The 895 needs time for the bus mode to settle */
4458 OUTW (nc_sien, RST);
4460 ** Enable Tolerant, reset IRQD if present and
4461 ** properly set IRQ mode, prior to resetting the bus.
4463 OUTB (nc_stest3, TE);
4464 OUTB (nc_scntl1, CRST);
4467 if (!driver_setup.bus_check)
4470 ** Check for no terminators or SCSI bus shorts to ground.
4471 ** Read SCSI data bus, data parity bits and control signals.
4472 ** We are expecting RESET to be TRUE and other signals to be
4476 term = INB(nc_sstat0);
4477 term = ((term & 2) << 7) + ((term & 1) << 17); /* rst sdp0 */
4478 term |= ((INB(nc_sstat2) & 0x01) << 26) | /* sdp1 */
4479 ((INW(nc_sbdl) & 0xff) << 9) | /* d7-0 */
4480 ((INW(nc_sbdl) & 0xff00) << 10) | /* d15-8 */
4481 INB(nc_sbcl); /* req ack bsy sel atn msg cd io */
4483 if (!(np->features & FE_WIDE))
4486 if (term != (2<<7)) {
4487 printk("%s: suspicious SCSI data while resetting the BUS.\n",
4489 printk("%s: %sdp0,d7-0,rst,req,ack,bsy,sel,atn,msg,c/d,i/o = "
4490 "0x%lx, expecting 0x%lx\n",
4492 (np->features & FE_WIDE) ? "dp1,d15-8," : "",
4493 (u_long)term, (u_long)(2<<7));
4494 if (driver_setup.bus_check == 1)
4498 OUTB (nc_scntl1, 0);
4503 * Start reset process.
4504 * If reset in progress do nothing.
4505 * The interrupt handler will reinitialize the chip.
4506 * The timeout handler will wait for settle_time before
4507 * clearing it and so resuming command processing.
4509 static void ncr_start_reset(struct ncb *np)
4511 if (!np->settle_time) {
4512 ncr_reset_scsi_bus(np, 1, driver_setup.settle_delay);
4516 /*==========================================================
4519 ** Reset the SCSI BUS.
4520 ** This is called from the generic SCSI driver.
4523 **==========================================================
4525 static int ncr_reset_bus (struct ncb *np)
4528 * Return immediately if reset is in progress.
4530 if (np->settle_time) {
4534 * Start the reset process.
4535 * The script processor is then assumed to be stopped.
4536 * Commands will now be queued in the waiting list until a settle
4537 * delay of 2 seconds will be completed.
4539 ncr_start_reset(np);
4541 * Wake-up all awaiting commands with DID_RESET.
4543 reset_waiting_list(np);
4545 * Wake-up all pending commands with HS_RESET -> DID_RESET.
4547 ncr_wakeup(np, HS_RESET);
4552 static void ncr_detach(struct ncb *np)
4561 /* Local copy so we don't access np after freeing it! */
4562 strlcpy(inst_name, ncr_name(np), sizeof(inst_name));
4564 printk("%s: releasing host resources\n", ncr_name(np));
4567 ** Stop the ncr_timeout process
4568 ** Set release_stage to 1 and wait that ncr_timeout() set it to 2.
4571 #ifdef DEBUG_NCR53C8XX
4572 printk("%s: stopping the timer\n", ncr_name(np));
4574 np->release_stage = 1;
4575 for (i = 50 ; i && np->release_stage != 2 ; i--)
4577 if (np->release_stage != 2)
4578 printk("%s: the timer seems to be already stopped\n", ncr_name(np));
4579 else np->release_stage = 2;
4582 ** Disable chip interrupts
4585 #ifdef DEBUG_NCR53C8XX
4586 printk("%s: disabling chip interrupts\n", ncr_name(np));
4593 ** Restore bios setting for automatic clock detection.
4596 printk("%s: resetting chip\n", ncr_name(np));
4597 ncr_chip_reset(np, 100);
4599 OUTB(nc_dmode, np->sv_dmode);
4600 OUTB(nc_dcntl, np->sv_dcntl);
4601 OUTB(nc_ctest0, np->sv_ctest0);
4602 OUTB(nc_ctest3, np->sv_ctest3);
4603 OUTB(nc_ctest4, np->sv_ctest4);
4604 OUTB(nc_ctest5, np->sv_ctest5);
4605 OUTB(nc_gpcntl, np->sv_gpcntl);
4606 OUTB(nc_stest2, np->sv_stest2);
4608 ncr_selectclock(np, np->sv_scntl3);
4611 ** Free allocated ccb(s)
4614 while ((cp=np->ccb->link_ccb) != NULL) {
4615 np->ccb->link_ccb = cp->link_ccb;
4616 if (cp->host_status) {
4617 printk("%s: shall free an active ccb (host_status=%d)\n",
4618 ncr_name(np), cp->host_status);
4620 #ifdef DEBUG_NCR53C8XX
4621 printk("%s: freeing ccb (%lx)\n", ncr_name(np), (u_long) cp);
4623 m_free_dma(cp, sizeof(*cp), "CCB");
4626 /* Free allocated tp(s) */
4628 for (target = 0; target < MAX_TARGET ; target++) {
4629 tp=&np->target[target];
4630 for (lun = 0 ; lun < MAX_LUN ; lun++) {
4633 #ifdef DEBUG_NCR53C8XX
4634 printk("%s: freeing lp (%lx)\n", ncr_name(np), (u_long) lp);
4636 if (lp->jump_ccb != &lp->jump_ccb_0)
4637 m_free_dma(lp->jump_ccb,256,"JUMP_CCB");
4638 m_free_dma(lp, sizeof(*lp), "LCB");
4644 m_free_dma(np->scripth0, sizeof(struct scripth), "SCRIPTH");
4646 m_free_dma(np->script0, sizeof(struct script), "SCRIPT");
4648 m_free_dma(np->ccb, sizeof(struct ccb), "CCB");
4649 m_free_dma(np, sizeof(struct ncb), "NCB");
4651 printk("%s: host resources successfully released\n", inst_name);
4654 /*==========================================================
4657 ** Complete execution of a SCSI command.
4658 ** Signal completion to the generic SCSI driver.
4661 **==========================================================
4664 void ncr_complete (struct ncb *np, struct ccb *cp)
4666 struct scsi_cmnd *cmd;
4674 if (!cp || cp->magic != CCB_MAGIC || !cp->cmd)
4678 ** Print minimal debug information.
4681 if (DEBUG_FLAGS & DEBUG_TINY)
4682 printk ("CCB=%lx STAT=%x/%x\n", (unsigned long)cp,
4683 cp->host_status,cp->scsi_status);
4686 ** Get command, target and lun pointers.
4691 tp = &np->target[cmd->device->id];
4692 lp = tp->lp[cmd->device->lun];
4695 ** We donnot queue more than 1 ccb per target
4696 ** with negotiation at any time. If this ccb was
4697 ** used for negotiation, clear this info in the tcb.
4700 if (cp == tp->nego_cp)
4704 ** If auto-sense performed, change scsi status.
4706 if (cp->auto_sense) {
4707 cp->scsi_status = cp->auto_sense;
4711 ** If we were recovering from queue full or performing
4712 ** auto-sense, requeue skipped CCBs to the wait queue.
4715 if (lp && lp->held_ccb) {
4716 if (cp == lp->held_ccb) {
4717 list_splice_init(&lp->skip_ccbq, &lp->wait_ccbq);
4718 lp->held_ccb = NULL;
4723 ** Check for parity errors.
4726 if (cp->parity_status > 1) {
4727 PRINT_ADDR(cmd, "%d parity error(s).\n",cp->parity_status);
4731 ** Check for extended errors.
4734 if (cp->xerr_status != XE_OK) {
4735 switch (cp->xerr_status) {
4737 PRINT_ADDR(cmd, "extraneous data discarded.\n");
4740 PRINT_ADDR(cmd, "invalid scsi phase (4/5).\n");
4743 PRINT_ADDR(cmd, "extended error %d.\n",
4747 if (cp->host_status==HS_COMPLETE)
4748 cp->host_status = HS_FAIL;
4752 ** Print out any error for debugging purpose.
4754 if (DEBUG_FLAGS & (DEBUG_RESULT|DEBUG_TINY)) {
4755 if (cp->host_status != HS_COMPLETE ||
4756 cp->scsi_status != SAM_STAT_GOOD) {
4757 PRINT_ADDR(cmd, "ERROR: cmd=%x host_status=%x "
4758 "scsi_status=%x\n", cmd->cmnd[0],
4759 cp->host_status, cp->scsi_status);
4764 ** Check the status.
4767 if ( (cp->host_status == HS_COMPLETE)
4768 && (cp->scsi_status == SAM_STAT_GOOD ||
4769 cp->scsi_status == SAM_STAT_CONDITION_MET)) {
4771 * All went well (GOOD status).
4772 * CONDITION MET status is returned on
4773 * `Pre-Fetch' or `Search data' success.
4775 set_status_byte(cmd, cp->scsi_status);
4779 ** Could dig out the correct value for resid,
4780 ** but it would be quite complicated.
4782 /* if (cp->phys.header.lastp != cp->phys.header.goalp) */
4785 ** Allocate the lcb if not yet.
4788 ncr_alloc_lcb (np, cmd->device->id, cmd->device->lun);
4790 tp->bytes += cp->data_len;
4794 ** If tags was reduced due to queue full,
4795 ** increase tags if 1000 good status received.
4797 if (lp && lp->usetags && lp->numtags < lp->maxtags) {
4799 if (lp->num_good >= 1000) {
4802 ncr_setup_tags (np, cmd->device);
4805 } else if ((cp->host_status == HS_COMPLETE)
4806 && (cp->scsi_status == SAM_STAT_CHECK_CONDITION)) {
4808 ** Check condition code
4810 set_status_byte(cmd, SAM_STAT_CHECK_CONDITION);
4813 ** Copy back sense data to caller's buffer.
4815 memcpy(cmd->sense_buffer, cp->sense_buf,
4816 min_t(size_t, SCSI_SENSE_BUFFERSIZE,
4817 sizeof(cp->sense_buf)));
4819 if (DEBUG_FLAGS & (DEBUG_RESULT|DEBUG_TINY)) {
4820 u_char *p = cmd->sense_buffer;
4822 PRINT_ADDR(cmd, "sense data:");
4823 for (i=0; i<14; i++) printk (" %x", *p++);
4826 } else if ((cp->host_status == HS_COMPLETE)
4827 && (cp->scsi_status == SAM_STAT_RESERVATION_CONFLICT)) {
4829 ** Reservation Conflict condition code
4831 set_status_byte(cmd, SAM_STAT_RESERVATION_CONFLICT);
4833 } else if ((cp->host_status == HS_COMPLETE)
4834 && (cp->scsi_status == SAM_STAT_BUSY ||
4835 cp->scsi_status == SAM_STAT_TASK_SET_FULL)) {
4840 set_status_byte(cmd, cp->scsi_status);
4842 } else if ((cp->host_status == HS_SEL_TIMEOUT)
4843 || (cp->host_status == HS_TIMEOUT)) {
4848 set_status_byte(cmd, cp->scsi_status);
4849 set_host_byte(cmd, DID_TIME_OUT);
4851 } else if (cp->host_status == HS_RESET) {
4856 set_status_byte(cmd, cp->scsi_status);
4857 set_host_byte(cmd, DID_RESET);
4859 } else if (cp->host_status == HS_ABORTED) {
4864 set_status_byte(cmd, cp->scsi_status);
4865 set_host_byte(cmd, DID_ABORT);
4870 ** Other protocol messes
4872 PRINT_ADDR(cmd, "COMMAND FAILED (%x %x) @%p.\n",
4873 cp->host_status, cp->scsi_status, cp);
4875 set_status_byte(cmd, cp->scsi_status);
4876 set_host_byte(cmd, DID_ERROR);
4883 if (tp->usrflag & UF_TRACE) {
4886 PRINT_ADDR(cmd, " CMD:");
4887 p = (u_char*) &cmd->cmnd[0];
4888 for (i=0; i<cmd->cmd_len; i++) printk (" %x", *p++);
4890 if (cp->host_status==HS_COMPLETE) {
4891 switch (cp->scsi_status) {
4895 case SAM_STAT_CHECK_CONDITION:
4897 p = (u_char*) &cmd->sense_buffer;
4898 for (i=0; i<14; i++)
4899 printk (" %x", *p++);
4902 printk (" STAT: %x\n", cp->scsi_status);
4905 } else printk (" HOSTERROR: %x", cp->host_status);
4912 ncr_free_ccb (np, cp);
4915 ** requeue awaiting scsi commands for this lun.
4917 if (lp && lp->queuedccbs < lp->queuedepth &&
4918 !list_empty(&lp->wait_ccbq))
4919 ncr_start_next_ccb(np, lp, 2);
4922 ** requeue awaiting scsi commands for this controller.
4924 if (np->waiting_list)
4925 requeue_waiting_list(np);
4928 ** signal completion to generic driver.
4930 ncr_queue_done_cmd(np, cmd);
4933 /*==========================================================
4936 ** Signal all (or one) control block done.
4939 **==========================================================
4943 ** This CCB has been skipped by the NCR.
4944 ** Queue it in the corresponding unit queue.
4946 static void ncr_ccb_skipped(struct ncb *np, struct ccb *cp)
4948 struct tcb *tp = &np->target[cp->target];
4949 struct lcb *lp = tp->lp[cp->lun];
4951 if (lp && cp != np->ccb) {
4952 cp->host_status &= ~HS_SKIPMASK;
4953 cp->start.schedule.l_paddr =
4954 cpu_to_scr(NCB_SCRIPT_PHYS (np, select));
4955 list_move_tail(&cp->link_ccbq, &lp->skip_ccbq);
4967 ** The NCR has completed CCBs.
4968 ** Look at the DONE QUEUE if enabled, otherwise scan all CCBs
4970 void ncr_wakeup_done (struct ncb *np)
4973 #ifdef SCSI_NCR_CCB_DONE_SUPPORT
4976 i = np->ccb_done_ic;
4982 cp = np->ccb_done[j];
4983 if (!CCB_DONE_VALID(cp))
4986 np->ccb_done[j] = (struct ccb *)CCB_DONE_EMPTY;
4987 np->scripth->done_queue[5*j + 4] =
4988 cpu_to_scr(NCB_SCRIPT_PHYS (np, done_plug));
4990 np->scripth->done_queue[5*i + 4] =
4991 cpu_to_scr(NCB_SCRIPT_PHYS (np, done_end));
4993 if (cp->host_status & HS_DONEMASK)
4994 ncr_complete (np, cp);
4995 else if (cp->host_status & HS_SKIPMASK)
4996 ncr_ccb_skipped (np, cp);
5000 np->ccb_done_ic = i;
5004 if (cp->host_status & HS_DONEMASK)
5005 ncr_complete (np, cp);
5006 else if (cp->host_status & HS_SKIPMASK)
5007 ncr_ccb_skipped (np, cp);
5014 ** Complete all active CCBs.
5016 void ncr_wakeup (struct ncb *np, u_long code)
5018 struct ccb *cp = np->ccb;
5021 if (cp->host_status != HS_IDLE) {
5022 cp->host_status = code;
5023 ncr_complete (np, cp);
5033 /* Some initialisation must be done immediately following reset, for 53c720,
5034 * at least. EA (dcntl bit 5) isn't set here as it is set once only in
5035 * the _detect function.
5037 static void ncr_chip_reset(struct ncb *np, int delay)
5039 OUTB (nc_istat, SRST);
5041 OUTB (nc_istat, 0 );
5043 if (np->features & FE_EHP)
5044 OUTB (nc_ctest0, EHP);
5045 if (np->features & FE_MUX)
5046 OUTB (nc_ctest4, MUX);
5050 /*==========================================================
5056 **==========================================================
5059 void ncr_init (struct ncb *np, int reset, char * msg, u_long code)
5064 ** Reset chip if asked, otherwise just clear fifos.
5068 OUTB (nc_istat, SRST);
5072 OUTB (nc_stest3, TE|CSF);
5073 OUTONB (nc_ctest3, CLF);
5080 if (msg) printk (KERN_INFO "%s: restart (%s).\n", ncr_name (np), msg);
5083 ** Clear Start Queue
5085 np->queuedepth = MAX_START - 1; /* 1 entry needed as end marker */
5086 for (i = 1; i < MAX_START + MAX_START; i += 2)
5087 np->scripth0->tryloop[i] =
5088 cpu_to_scr(NCB_SCRIPT_PHYS (np, idle));
5091 ** Start at first entry.
5094 np->script0->startpos[0] = cpu_to_scr(NCB_SCRIPTH_PHYS (np, tryloop));
5096 #ifdef SCSI_NCR_CCB_DONE_SUPPORT
5100 for (i = 0; i < MAX_DONE; i++) {
5101 np->ccb_done[i] = (struct ccb *)CCB_DONE_EMPTY;
5102 np->scripth0->done_queue[5*i + 4] =
5103 cpu_to_scr(NCB_SCRIPT_PHYS (np, done_end));
5108 ** Start at first entry.
5110 np->script0->done_pos[0] = cpu_to_scr(NCB_SCRIPTH_PHYS (np,done_queue));
5111 np->ccb_done_ic = MAX_DONE-1;
5112 np->scripth0->done_queue[5*(MAX_DONE-1) + 4] =
5113 cpu_to_scr(NCB_SCRIPT_PHYS (np, done_plug));
5116 ** Wakeup all pending jobs.
5118 ncr_wakeup (np, code);
5125 ** Remove reset; big delay because the 895 needs time for the
5126 ** bus mode to settle
5128 ncr_chip_reset(np, 2000);
5130 OUTB (nc_scntl0, np->rv_scntl0 | 0xc0);
5131 /* full arb., ena parity, par->ATN */
5132 OUTB (nc_scntl1, 0x00); /* odd parity, and remove CRST!! */
5134 ncr_selectclock(np, np->rv_scntl3); /* Select SCSI clock */
5136 OUTB (nc_scid , RRE|np->myaddr); /* Adapter SCSI address */
5137 OUTW (nc_respid, 1ul<<np->myaddr); /* Id to respond to */
5138 OUTB (nc_istat , SIGP ); /* Signal Process */
5139 OUTB (nc_dmode , np->rv_dmode); /* Burst length, dma mode */
5140 OUTB (nc_ctest5, np->rv_ctest5); /* Large fifo + large burst */
5142 OUTB (nc_dcntl , NOCOM|np->rv_dcntl); /* Protect SFBR */
5143 OUTB (nc_ctest0, np->rv_ctest0); /* 720: CDIS and EHP */
5144 OUTB (nc_ctest3, np->rv_ctest3); /* Write and invalidate */
5145 OUTB (nc_ctest4, np->rv_ctest4); /* Master parity checking */
5147 OUTB (nc_stest2, EXT|np->rv_stest2); /* Extended Sreq/Sack filtering */
5148 OUTB (nc_stest3, TE); /* TolerANT enable */
5149 OUTB (nc_stime0, 0x0c ); /* HTH disabled STO 0.25 sec */
5152 ** Disable disconnects.
5158 ** Enable GPIO0 pin for writing if LED support.
5161 if (np->features & FE_LED0) {
5162 OUTOFFB (nc_gpcntl, 0x01);
5169 OUTW (nc_sien , STO|HTH|MA|SGE|UDC|RST|PAR);
5170 OUTB (nc_dien , MDPE|BF|ABRT|SSI|SIR|IID);
5173 ** Fill in target structure.
5174 ** Reinitialize usrsync.
5175 ** Reinitialize usrwide.
5176 ** Prepare sync negotiation according to actual SCSI bus mode.
5179 for (i=0;i<MAX_TARGET;i++) {
5180 struct tcb *tp = &np->target[i];
5183 tp->wval = np->rv_scntl3;
5185 if (tp->usrsync != 255) {
5186 if (tp->usrsync <= np->maxsync) {
5187 if (tp->usrsync < np->minsync) {
5188 tp->usrsync = np->minsync;
5195 if (tp->usrwide > np->maxwide)
5196 tp->usrwide = np->maxwide;
5201 ** Start script processor.
5205 printk ("%s: Downloading SCSI SCRIPTS.\n",
5207 OUTL (nc_scratcha, vtobus(np->script0));
5208 OUTL_DSP (NCB_SCRIPTH_PHYS (np, start_ram));
5211 OUTL_DSP (NCB_SCRIPT_PHYS (np, start));
5214 /*==========================================================
5216 ** Prepare the negotiation values for wide and
5217 ** synchronous transfers.
5219 **==========================================================
5222 static void ncr_negotiate (struct ncb* np, struct tcb* tp)
5225 ** minsync unit is 4ns !
5228 u_long minsync = tp->usrsync;
5231 ** SCSI bus mode limit
5234 if (np->scsi_mode && np->scsi_mode == SMODE_SE) {
5235 if (minsync < 12) minsync = 12;
5242 if (minsync < np->minsync)
5243 minsync = np->minsync;
5249 if (minsync > np->maxsync)
5252 if (tp->maxoffs > np->maxoffs)
5253 tp->maxoffs = np->maxoffs;
5255 tp->minsync = minsync;
5256 tp->maxoffs = (minsync<255 ? tp->maxoffs : 0);
5259 ** period=0: has to negotiate sync transfer
5265 ** widedone=0: has to negotiate wide transfer
5270 /*==========================================================
5272 ** Get clock factor and sync divisor for a given
5273 ** synchronous factor period.
5274 ** Returns the clock factor (in sxfer) and scntl3
5275 ** synchronous divisor field.
5277 **==========================================================
5280 static void ncr_getsync(struct ncb *np, u_char sfac, u_char *fakp, u_char *scntl3p)
5282 u_long clk = np->clock_khz; /* SCSI clock frequency in kHz */
5283 int div = np->clock_divn; /* Number of divisors supported */
5284 u_long fak; /* Sync factor in sxfer */
5285 u_long per; /* Period in tenths of ns */
5286 u_long kpc; /* (per * clk) */
5289 ** Compute the synchronous period in tenths of nano-seconds
5291 if (sfac <= 10) per = 250;
5292 else if (sfac == 11) per = 303;
5293 else if (sfac == 12) per = 500;
5294 else per = 40 * sfac;
5297 ** Look for the greatest clock divisor that allows an
5298 ** input speed faster than the period.
5302 if (kpc >= (div_10M[div] << 2)) break;
5305 ** Calculate the lowest clock factor that allows an output
5306 ** speed not faster than the period.
5308 fak = (kpc - 1) / div_10M[div] + 1;
5310 if (fak < 4) fak = 4; /* Should never happen, too bad ... */
5313 ** Compute and return sync parameters for the ncr
5316 *scntl3p = ((div+1) << 4) + (sfac < 25 ? 0x80 : 0);
5320 /*==========================================================
5322 ** Set actual values, sync status and patch all ccbs of
5323 ** a target according to new sync/wide agreement.
5325 **==========================================================
5328 static void ncr_set_sync_wide_status (struct ncb *np, u_char target)
5331 struct tcb *tp = &np->target[target];
5334 ** set actual value and sync_status
5336 OUTB (nc_sxfer, tp->sval);
5337 np->sync_st = tp->sval;
5338 OUTB (nc_scntl3, tp->wval);
5339 np->wide_st = tp->wval;
5342 ** patch ALL ccbs of this target.
5344 for (cp = np->ccb; cp; cp = cp->link_ccb) {
5345 if (!cp->cmd) continue;
5346 if (scmd_id(cp->cmd) != target) continue;
5347 cp->phys.select.sel_scntl3 = tp->wval;
5348 cp->phys.select.sel_sxfer = tp->sval;
5352 /*==========================================================
5354 ** Switch sync mode for current job and it's target
5356 **==========================================================
5359 static void ncr_setsync (struct ncb *np, struct ccb *cp, u_char scntl3, u_char sxfer)
5361 struct scsi_cmnd *cmd = cp->cmd;
5363 u_char target = INB (nc_sdid) & 0x0f;
5366 BUG_ON(target != (scmd_id(cmd) & 0xf));
5368 tp = &np->target[target];
5370 if (!scntl3 || !(sxfer & 0x1f))
5371 scntl3 = np->rv_scntl3;
5372 scntl3 = (scntl3 & 0xf0) | (tp->wval & EWS) | (np->rv_scntl3 & 0x07);
5375 ** Deduce the value of controller sync period from scntl3.
5376 ** period is in tenths of nano-seconds.
5379 idiv = ((scntl3 >> 4) & 0x7);
5380 if ((sxfer & 0x1f) && idiv)
5381 tp->period = (((sxfer>>5)+4)*div_10M[idiv-1])/np->clock_khz;
5383 tp->period = 0xffff;
5385 /* Stop there if sync parameters are unchanged */
5386 if (tp->sval == sxfer && tp->wval == scntl3)
5391 if (sxfer & 0x01f) {
5392 /* Disable extended Sreq/Sack filtering */
5393 if (tp->period <= 2000)
5394 OUTOFFB(nc_stest2, EXT);
5397 spi_display_xfer_agreement(tp->starget);
5400 ** set actual value and sync_status
5401 ** patch ALL ccbs of this target.
5403 ncr_set_sync_wide_status(np, target);
5406 /*==========================================================
5408 ** Switch wide mode for current job and it's target
5409 ** SCSI specs say: a SCSI device that accepts a WDTR
5410 ** message shall reset the synchronous agreement to
5411 ** asynchronous mode.
5413 **==========================================================
5416 static void ncr_setwide (struct ncb *np, struct ccb *cp, u_char wide, u_char ack)
5418 struct scsi_cmnd *cmd = cp->cmd;
5419 u16 target = INB (nc_sdid) & 0x0f;
5424 BUG_ON(target != (scmd_id(cmd) & 0xf));
5426 tp = &np->target[target];
5427 tp->widedone = wide+1;
5428 scntl3 = (tp->wval & (~EWS)) | (wide ? EWS : 0);
5430 sxfer = ack ? 0 : tp->sval;
5433 ** Stop there if sync/wide parameters are unchanged
5435 if (tp->sval == sxfer && tp->wval == scntl3) return;
5440 ** Bells and whistles ;-)
5442 if (bootverbose >= 2) {
5443 dev_info(&cmd->device->sdev_target->dev, "WIDE SCSI %sabled.\n",
5444 (scntl3 & EWS) ? "en" : "dis");
5448 ** set actual value and sync_status
5449 ** patch ALL ccbs of this target.
5451 ncr_set_sync_wide_status(np, target);
5454 /*==========================================================
5456 ** Switch tagged mode for a target.
5458 **==========================================================
5461 static void ncr_setup_tags (struct ncb *np, struct scsi_device *sdev)
5463 unsigned char tn = sdev->id, ln = sdev->lun;
5464 struct tcb *tp = &np->target[tn];
5465 struct lcb *lp = tp->lp[ln];
5466 u_char reqtags, maxdepth;
5471 if ((!tp) || (!lp) || !sdev)
5475 ** If SCSI device queue depth is not yet set, leave here.
5477 if (!lp->scdev_depth)
5481 ** Donnot allow more tags than the SCSI driver can queue
5483 ** Donnot allow more tags than we can handle.
5485 maxdepth = lp->scdev_depth;
5486 if (maxdepth > lp->maxnxs) maxdepth = lp->maxnxs;
5487 if (lp->maxtags > maxdepth) lp->maxtags = maxdepth;
5488 if (lp->numtags > maxdepth) lp->numtags = maxdepth;
5491 ** only devices conformant to ANSI Version >= 2
5492 ** only devices capable of tagged commands
5493 ** only if enabled by user ..
5495 if (sdev->tagged_supported && lp->numtags > 1) {
5496 reqtags = lp->numtags;
5502 ** Update max number of tags
5504 lp->numtags = reqtags;
5505 if (lp->numtags > lp->maxtags)
5506 lp->maxtags = lp->numtags;
5509 ** If we want to switch tag mode, we must wait
5510 ** for no CCB to be active.
5512 if (reqtags > 1 && lp->usetags) { /* Stay in tagged mode */
5513 if (lp->queuedepth == reqtags) /* Already announced */
5515 lp->queuedepth = reqtags;
5517 else if (reqtags <= 1 && !lp->usetags) { /* Stay in untagged mode */
5518 lp->queuedepth = reqtags;
5521 else { /* Want to switch tag mode */
5522 if (lp->busyccbs) /* If not yet safe, return */
5524 lp->queuedepth = reqtags;
5525 lp->usetags = reqtags > 1 ? 1 : 0;
5529 ** Patch the lun mini-script, according to tag mode.
5531 lp->jump_tag.l_paddr = lp->usetags?
5532 cpu_to_scr(NCB_SCRIPT_PHYS(np, resel_tag)) :
5533 cpu_to_scr(NCB_SCRIPT_PHYS(np, resel_notag));
5536 ** Announce change to user.
5540 dev_info(&sdev->sdev_gendev,
5541 "tagged command queue depth set to %d\n",
5544 dev_info(&sdev->sdev_gendev,
5545 "tagged command queueing disabled\n");
5550 /*==========================================================
5553 ** ncr timeout handler.
5556 **==========================================================
5558 ** Misused to keep the driver running when
5559 ** interrupts are not configured correctly.
5561 **----------------------------------------------------------
5564 static void ncr_timeout (struct ncb *np)
5566 u_long thistime = jiffies;
5569 ** If release process in progress, let's go
5570 ** Set the release stage from 1 to 2 to synchronize
5571 ** with the release process.
5574 if (np->release_stage) {
5575 if (np->release_stage == 1) np->release_stage = 2;
5579 np->timer.expires = jiffies + SCSI_NCR_TIMER_INTERVAL;
5580 add_timer(&np->timer);
5583 ** If we are resetting the ncr, wait for settle_time before
5584 ** clearing it. Then command processing will be resumed.
5586 if (np->settle_time) {
5587 if (np->settle_time <= thistime) {
5588 if (bootverbose > 1)
5589 printk("%s: command processing resumed\n", ncr_name(np));
5590 np->settle_time = 0;
5592 requeue_waiting_list(np);
5598 ** Since the generic scsi driver only allows us 0.5 second
5599 ** to perform abort of a command, we must look at ccbs about
5600 ** every 0.25 second.
5602 if (np->lasttime + 4*HZ < thistime) {
5604 ** block ncr interrupts
5606 np->lasttime = thistime;
5609 #ifdef SCSI_NCR_BROKEN_INTR
5610 if (INB(nc_istat) & (INTF|SIP|DIP)) {
5613 ** Process pending interrupts.
5615 if (DEBUG_FLAGS & DEBUG_TINY) printk ("{");
5617 if (DEBUG_FLAGS & DEBUG_TINY) printk ("}");
5619 #endif /* SCSI_NCR_BROKEN_INTR */
5622 /*==========================================================
5624 ** log message for real hard errors
5626 ** "ncr0 targ 0?: ERROR (ds:si) (so-si-sd) (sxfer/scntl3) @ name (dsp:dbc)."
5627 ** " reg: r0 r1 r2 r3 r4 r5 r6 ..... rf."
5629 ** exception register:
5634 ** so: control lines as driver by NCR.
5635 ** si: control lines as seen by NCR.
5636 ** sd: scsi data lines as seen by NCR.
5639 ** sxfer: (see the manual)
5640 ** scntl3: (see the manual)
5642 ** current script command:
5643 ** dsp: script address (relative to start of script).
5644 ** dbc: first word of script command.
5646 ** First 16 register of the chip:
5649 **==========================================================
5652 static void ncr_log_hard_error(struct ncb *np, u16 sist, u_char dstat)
5658 u_char *script_base;
5663 if (dsp > np->p_script && dsp <= np->p_script + sizeof(struct script)) {
5664 script_ofs = dsp - np->p_script;
5665 script_size = sizeof(struct script);
5666 script_base = (u_char *) np->script0;
5667 script_name = "script";
5669 else if (np->p_scripth < dsp &&
5670 dsp <= np->p_scripth + sizeof(struct scripth)) {
5671 script_ofs = dsp - np->p_scripth;
5672 script_size = sizeof(struct scripth);
5673 script_base = (u_char *) np->scripth0;
5674 script_name = "scripth";
5679 script_name = "mem";
5682 printk ("%s:%d: ERROR (%x:%x) (%x-%x-%x) (%x/%x) @ (%s %x:%08x).\n",
5683 ncr_name (np), (unsigned)INB (nc_sdid)&0x0f, dstat, sist,
5684 (unsigned)INB (nc_socl), (unsigned)INB (nc_sbcl), (unsigned)INB (nc_sbdl),
5685 (unsigned)INB (nc_sxfer),(unsigned)INB (nc_scntl3), script_name, script_ofs,
5686 (unsigned)INL (nc_dbc));
5688 if (((script_ofs & 3) == 0) &&
5689 (unsigned)script_ofs < script_size) {
5690 printk ("%s: script cmd = %08x\n", ncr_name(np),
5691 scr_to_cpu((int) *(ncrcmd *)(script_base + script_ofs)));
5694 printk ("%s: regdump:", ncr_name(np));
5696 printk (" %02x", (unsigned)INB_OFF(i));
5700 /*============================================================
5702 ** ncr chip exception handler.
5704 **============================================================
5706 ** In normal cases, interrupt conditions occur one at a
5707 ** time. The ncr is able to stack in some extra registers
5708 ** other interrupts that will occur after the first one.
5709 ** But, several interrupts may occur at the same time.
5711 ** We probably should only try to deal with the normal
5712 ** case, but it seems that multiple interrupts occur in
5713 ** some cases that are not abnormal at all.
5715 ** The most frequent interrupt condition is Phase Mismatch.
5716 ** We should want to service this interrupt quickly.
5717 ** A SCSI parity error may be delivered at the same time.
5718 ** The SIR interrupt is not very frequent in this driver,
5719 ** since the INTFLY is likely used for command completion
5721 ** The Selection Timeout interrupt may be triggered with
5723 ** The SBMC interrupt (SCSI Bus Mode Change) may probably
5724 ** occur at any time.
5726 ** This handler try to deal as cleverly as possible with all
5729 **============================================================
5732 void ncr_exception (struct ncb *np)
5734 u_char istat, dstat;
5739 ** interrupt on the fly ?
5740 ** Since the global header may be copied back to a CCB
5741 ** using a posted PCI memory write, the last operation on
5742 ** the istat register is a READ in order to flush posted
5743 ** PCI write commands.
5745 istat = INB (nc_istat);
5747 OUTB (nc_istat, (istat & SIGP) | INTF);
5748 istat = INB (nc_istat);
5749 if (DEBUG_FLAGS & DEBUG_TINY) printk ("F ");
5750 ncr_wakeup_done (np);
5753 if (!(istat & (SIP|DIP)))
5757 OUTB (nc_istat, CABRT);
5760 ** Steinbach's Guideline for Systems Programming:
5761 ** Never test for an error condition you don't know how to handle.
5764 sist = (istat & SIP) ? INW (nc_sist) : 0;
5765 dstat = (istat & DIP) ? INB (nc_dstat) : 0;
5767 if (DEBUG_FLAGS & DEBUG_TINY)
5768 printk ("<%d|%x:%x|%x:%x>",
5771 (unsigned)INL(nc_dsp),
5772 (unsigned)INL(nc_dbc));
5774 /*========================================================
5775 ** First, interrupts we want to service cleanly.
5777 ** Phase mismatch is the most frequent interrupt, and
5778 ** so we have to service it as quickly and as cleanly
5780 ** Programmed interrupts are rarely used in this driver,
5781 ** but we must handle them cleanly anyway.
5782 ** We try to deal with PAR and SBMC combined with
5783 ** some other interrupt(s).
5784 **=========================================================
5787 if (!(sist & (STO|GEN|HTH|SGE|UDC|RST)) &&
5788 !(dstat & (MDPE|BF|ABRT|IID))) {
5789 if ((sist & SBMC) && ncr_int_sbmc (np))
5791 if ((sist & PAR) && ncr_int_par (np))
5802 ** DEL 397 - 53C875 Rev 3 - Part Number 609-0392410 - ITEM 2.
5804 if (!(sist & (SBMC|PAR)) && !(dstat & SSI)) {
5805 printk( "%s: unknown interrupt(s) ignored, "
5806 "ISTAT=%x DSTAT=%x SIST=%x\n",
5807 ncr_name(np), istat, dstat, sist);
5814 /*========================================================
5815 ** Now, interrupts that need some fixing up.
5816 ** Order and multiple interrupts is so less important.
5818 ** If SRST has been asserted, we just reset the chip.
5820 ** Selection is intirely handled by the chip. If the
5821 ** chip says STO, we trust it. Seems some other
5822 ** interrupts may occur at the same time (UDC, IID), so
5823 ** we ignore them. In any case we do enough fix-up
5824 ** in the service routine.
5825 ** We just exclude some fatal dma errors.
5826 **=========================================================
5830 ncr_init (np, 1, bootverbose ? "scsi reset" : NULL, HS_RESET);
5835 !(dstat & (MDPE|BF|ABRT))) {
5837 ** DEL 397 - 53C875 Rev 3 - Part Number 609-0392410 - ITEM 1.
5839 OUTONB (nc_ctest3, CLF);
5845 /*=========================================================
5846 ** Now, interrupts we are not able to recover cleanly.
5847 ** (At least for the moment).
5849 ** Do the register dump.
5850 ** Log message for real hard errors.
5852 ** For MDPE, BF, ABORT, IID, SGE and HTH we reset the
5853 ** BUS and the chip.
5854 ** We are more soft for UDC.
5855 **=========================================================
5858 if (time_after(jiffies, np->regtime)) {
5859 np->regtime = jiffies + 10*HZ;
5860 for (i = 0; i<sizeof(np->regdump); i++)
5861 ((char*)&np->regdump)[i] = INB_OFF(i);
5862 np->regdump.nc_dstat = dstat;
5863 np->regdump.nc_sist = sist;
5866 ncr_log_hard_error(np, sist, dstat);
5868 printk ("%s: have to clear fifos.\n", ncr_name (np));
5869 OUTB (nc_stest3, TE|CSF);
5870 OUTONB (nc_ctest3, CLF);
5872 if ((sist & (SGE)) ||
5873 (dstat & (MDPE|BF|ABRT|IID))) {
5874 ncr_start_reset(np);
5879 printk ("%s: handshake timeout\n", ncr_name(np));
5880 ncr_start_reset(np);
5885 printk ("%s: unexpected disconnect\n", ncr_name(np));
5886 OUTB (HS_PRT, HS_UNEXPECTED);
5887 OUTL_DSP (NCB_SCRIPT_PHYS (np, cleanup));
5891 /*=========================================================
5892 ** We just miss the cause of the interrupt. :(
5893 ** Print a message. The timeout will do the real work.
5894 **=========================================================
5896 printk ("%s: unknown interrupt\n", ncr_name(np));
5899 /*==========================================================
5901 ** ncr chip exception handler for selection timeout
5903 **==========================================================
5905 ** There seems to be a bug in the 53c810.
5906 ** Although a STO-Interrupt is pending,
5907 ** it continues executing script commands.
5908 ** But it will fail and interrupt (IID) on
5909 ** the next instruction where it's looking
5910 ** for a valid phase.
5912 **----------------------------------------------------------
5915 void ncr_int_sto (struct ncb *np)
5919 if (DEBUG_FLAGS & DEBUG_TINY) printk ("T");
5922 ** look for ccb and set the status.
5927 while (cp && (CCB_PHYS (cp, phys) != dsa))
5931 cp-> host_status = HS_SEL_TIMEOUT;
5932 ncr_complete (np, cp);
5936 ** repair start queue and jump to start point.
5939 OUTL_DSP (NCB_SCRIPTH_PHYS (np, sto_restart));
5943 /*==========================================================
5945 ** ncr chip exception handler for SCSI bus mode change
5947 **==========================================================
5949 ** spi2-r12 11.2.3 says a transceiver mode change must
5950 ** generate a reset event and a device that detects a reset
5951 ** event shall initiate a hard reset. It says also that a
5952 ** device that detects a mode change shall set data transfer
5953 ** mode to eight bit asynchronous, etc...
5954 ** So, just resetting should be enough.
5957 **----------------------------------------------------------
5960 static int ncr_int_sbmc (struct ncb *np)
5962 u_char scsi_mode = INB (nc_stest4) & SMODE;
5964 if (scsi_mode != np->scsi_mode) {
5965 printk("%s: SCSI bus mode change from %x to %x.\n",
5966 ncr_name(np), np->scsi_mode, scsi_mode);
5968 np->scsi_mode = scsi_mode;
5972 ** Suspend command processing for 1 second and
5973 ** reinitialize all except the chip.
5975 np->settle_time = jiffies + HZ;
5976 ncr_init (np, 0, bootverbose ? "scsi mode change" : NULL, HS_RESET);
5982 /*==========================================================
5984 ** ncr chip exception handler for SCSI parity error.
5986 **==========================================================
5989 **----------------------------------------------------------
5992 static int ncr_int_par (struct ncb *np)
5994 u_char hsts = INB (HS_PRT);
5995 u32 dbc = INL (nc_dbc);
5996 u_char sstat1 = INB (nc_sstat1);
6001 printk("%s: SCSI parity error detected: SCR1=%d DBC=%x SSTAT1=%x\n",
6002 ncr_name(np), hsts, dbc, sstat1);
6005 * Ignore the interrupt if the NCR is not connected
6006 * to the SCSI bus, since the right work should have
6007 * been done on unexpected disconnection handling.
6009 if (!(INB (nc_scntl1) & ISCON))
6013 * If the nexus is not clearly identified, reset the bus.
6014 * We will try to do better later.
6016 if (hsts & HS_INVALMASK)
6020 * If the SCSI parity error occurs in MSG IN phase, prepare a
6021 * MSG PARITY message. Otherwise, prepare a INITIATOR DETECTED
6022 * ERROR message and let the device decide to retry the command
6023 * or to terminate with check condition. If we were in MSG IN
6024 * phase waiting for the response of a negotiation, we will
6025 * get SIR_NEGO_FAILED at dispatch.
6027 if (!(dbc & 0xc0000000))
6028 phase = (dbc >> 24) & 7;
6030 msg = MSG_PARITY_ERROR;
6032 msg = INITIATOR_ERROR;
6036 * If the NCR stopped on a MOVE ^ DATA_IN, we jump to a
6037 * script that will ignore all data in bytes until phase
6038 * change, since we are not sure the chip will wait the phase
6039 * change prior to delivering the interrupt.
6042 jmp = NCB_SCRIPTH_PHYS (np, par_err_data_in);
6044 jmp = NCB_SCRIPTH_PHYS (np, par_err_other);
6046 OUTONB (nc_ctest3, CLF ); /* clear dma fifo */
6047 OUTB (nc_stest3, TE|CSF); /* clear scsi fifo */
6049 np->msgout[0] = msg;
6054 ncr_start_reset(np);
6058 /*==========================================================
6061 ** ncr chip exception handler for phase errors.
6064 **==========================================================
6066 ** We have to construct a new transfer descriptor,
6067 ** to transfer the rest of the current block.
6069 **----------------------------------------------------------
6072 static void ncr_int_ma (struct ncb *np)
6089 sbcl = INB (nc_sbcl);
6092 rest = dbc & 0xffffff;
6095 ** Take into account dma fifo and various buffers and latches,
6096 ** only if the interrupted phase is an OUTPUT phase.
6099 if ((cmd & 1) == 0) {
6100 u_char ctest5, ss0, ss2;
6103 ctest5 = (np->rv_ctest5 & DFS) ? INB (nc_ctest5) : 0;
6105 delta=(((ctest5 << 8) | (INB (nc_dfifo) & 0xff)) - rest) & 0x3ff;
6107 delta=(INB (nc_dfifo) - rest) & 0x7f;
6110 ** The data in the dma fifo has not been transferred to
6111 ** the target -> add the amount to the rest
6112 ** and clear the data.
6113 ** Check the sstat2 register in case of wide transfer.
6117 ss0 = INB (nc_sstat0);
6118 if (ss0 & OLF) rest++;
6119 if (ss0 & ORF) rest++;
6120 if (INB(nc_scntl3) & EWS) {
6121 ss2 = INB (nc_sstat2);
6122 if (ss2 & OLF1) rest++;
6123 if (ss2 & ORF1) rest++;
6126 if (DEBUG_FLAGS & (DEBUG_TINY|DEBUG_PHASE))
6127 printk ("P%x%x RL=%d D=%d SS0=%x ", cmd&7, sbcl&7,
6128 (unsigned) rest, (unsigned) delta, ss0);
6131 if (DEBUG_FLAGS & (DEBUG_TINY|DEBUG_PHASE))
6132 printk ("P%x%x RL=%d ", cmd&7, sbcl&7, rest);
6138 OUTONB (nc_ctest3, CLF ); /* clear dma fifo */
6139 OUTB (nc_stest3, TE|CSF); /* clear scsi fifo */
6142 ** locate matching cp.
6143 ** if the interrupted phase is DATA IN or DATA OUT,
6144 ** trust the global header.
6149 if (CCB_PHYS(cp, phys) != dsa)
6153 while (cp && (CCB_PHYS (cp, phys) != dsa))
6158 ** try to find the interrupted script command,
6159 ** and the address at which to continue.
6163 if (dsp > np->p_script &&
6164 dsp <= np->p_script + sizeof(struct script)) {
6165 vdsp = (u32 *)((char*)np->script0 + (dsp-np->p_script-8));
6168 else if (dsp > np->p_scripth &&
6169 dsp <= np->p_scripth + sizeof(struct scripth)) {
6170 vdsp = (u32 *)((char*)np->scripth0 + (dsp-np->p_scripth-8));
6174 if (dsp == CCB_PHYS (cp, patch[2])) {
6175 vdsp = &cp->patch[0];
6176 nxtdsp = scr_to_cpu(vdsp[3]);
6178 else if (dsp == CCB_PHYS (cp, patch[6])) {
6179 vdsp = &cp->patch[4];
6180 nxtdsp = scr_to_cpu(vdsp[3]);
6185 ** log the information
6188 if (DEBUG_FLAGS & DEBUG_PHASE) {
6189 printk ("\nCP=%p CP2=%p DSP=%x NXT=%x VDSP=%p CMD=%x ",
6192 (unsigned)nxtdsp, vdsp, cmd);
6196 ** cp=0 means that the DSA does not point to a valid control
6197 ** block. This should not happen since we donnot use multi-byte
6198 ** move while we are being reselected ot after command complete.
6199 ** We are not able to recover from such a phase error.
6202 printk ("%s: SCSI phase error fixup: "
6203 "CCB already dequeued (0x%08lx)\n",
6204 ncr_name (np), (u_long) np->header.cp);
6209 ** get old startaddress and old length.
6212 oadr = scr_to_cpu(vdsp[1]);
6214 if (cmd & 0x10) { /* Table indirect */
6215 tblp = (u32 *) ((char*) &cp->phys + oadr);
6216 olen = scr_to_cpu(tblp[0]);
6217 oadr = scr_to_cpu(tblp[1]);
6220 olen = scr_to_cpu(vdsp[0]) & 0xffffff;
6223 if (DEBUG_FLAGS & DEBUG_PHASE) {
6224 printk ("OCMD=%x\nTBLP=%p OLEN=%x OADR=%x\n",
6225 (unsigned) (scr_to_cpu(vdsp[0]) >> 24),
6232 ** check cmd against assumed interrupted script command.
6235 if (cmd != (scr_to_cpu(vdsp[0]) >> 24)) {
6236 PRINT_ADDR(cp->cmd, "internal error: cmd=%02x != %02x=(vdsp[0] "
6237 ">> 24)\n", cmd, scr_to_cpu(vdsp[0]) >> 24);
6243 ** cp != np->header.cp means that the header of the CCB
6244 ** currently being processed has not yet been copied to
6245 ** the global header area. That may happen if the device did
6246 ** not accept all our messages after having been selected.
6248 if (cp != np->header.cp) {
6249 printk ("%s: SCSI phase error fixup: "
6250 "CCB address mismatch (0x%08lx != 0x%08lx)\n",
6251 ncr_name (np), (u_long) cp, (u_long) np->header.cp);
6255 ** if old phase not dataphase, leave here.
6259 PRINT_ADDR(cp->cmd, "phase change %x-%x %d@%08x resid=%d.\n",
6260 cmd&7, sbcl&7, (unsigned)olen,
6261 (unsigned)oadr, (unsigned)rest);
6262 goto unexpected_phase;
6266 ** choose the correct patch area.
6267 ** if savep points to one, choose the other.
6271 newtmp = CCB_PHYS (cp, patch);
6272 if (newtmp == scr_to_cpu(cp->phys.header.savep)) {
6273 newcmd = &cp->patch[4];
6274 newtmp = CCB_PHYS (cp, patch[4]);
6278 ** fillin the commands
6281 newcmd[0] = cpu_to_scr(((cmd & 0x0f) << 24) | rest);
6282 newcmd[1] = cpu_to_scr(oadr + olen - rest);
6283 newcmd[2] = cpu_to_scr(SCR_JUMP);
6284 newcmd[3] = cpu_to_scr(nxtdsp);
6286 if (DEBUG_FLAGS & DEBUG_PHASE) {
6287 PRINT_ADDR(cp->cmd, "newcmd[%d] %x %x %x %x.\n",
6288 (int) (newcmd - cp->patch),
6289 (unsigned)scr_to_cpu(newcmd[0]),
6290 (unsigned)scr_to_cpu(newcmd[1]),
6291 (unsigned)scr_to_cpu(newcmd[2]),
6292 (unsigned)scr_to_cpu(newcmd[3]));
6295 ** fake the return address (to the patch).
6296 ** and restart script processor at dispatcher.
6298 OUTL (nc_temp, newtmp);
6299 OUTL_DSP (NCB_SCRIPT_PHYS (np, dispatch));
6303 ** Unexpected phase changes that occurs when the current phase
6304 ** is not a DATA IN or DATA OUT phase are due to error conditions.
6305 ** Such event may only happen when the SCRIPTS is using a
6306 ** multibyte SCSI MOVE.
6308 ** Phase change Some possible cause
6310 ** COMMAND --> MSG IN SCSI parity error detected by target.
6311 ** COMMAND --> STATUS Bad command or refused by target.
6312 ** MSG OUT --> MSG IN Message rejected by target.
6313 ** MSG OUT --> COMMAND Bogus target that discards extended
6314 ** negotiation messages.
6316 ** The code below does not care of the new phase and so
6317 ** trusts the target. Why to annoy it ?
6318 ** If the interrupted phase is COMMAND phase, we restart at
6320 ** If a target does not get all the messages after selection,
6321 ** the code assumes blindly that the target discards extended
6322 ** messages and clears the negotiation status.
6323 ** If the target does not want all our response to negotiation,
6324 ** we force a SIR_NEGO_PROTO interrupt (it is a hack that avoids
6325 ** bloat for such a should_not_happen situation).
6326 ** In all other situation, we reset the BUS.
6327 ** Are these assumptions reasonable ? (Wait and see ...)
6334 case 2: /* COMMAND phase */
6335 nxtdsp = NCB_SCRIPT_PHYS (np, dispatch);
6338 case 3: /* STATUS phase */
6339 nxtdsp = NCB_SCRIPT_PHYS (np, dispatch);
6342 case 6: /* MSG OUT phase */
6343 np->scripth->nxtdsp_go_on[0] = cpu_to_scr(dsp + 8);
6344 if (dsp == NCB_SCRIPT_PHYS (np, send_ident)) {
6345 cp->host_status = HS_BUSY;
6346 nxtdsp = NCB_SCRIPTH_PHYS (np, clratn_go_on);
6348 else if (dsp == NCB_SCRIPTH_PHYS (np, send_wdtr) ||
6349 dsp == NCB_SCRIPTH_PHYS (np, send_sdtr)) {
6350 nxtdsp = NCB_SCRIPTH_PHYS (np, nego_bad_phase);
6354 case 7: /* MSG IN phase */
6355 nxtdsp = NCB_SCRIPT_PHYS (np, clrack);
6366 ncr_start_reset(np);
6370 static void ncr_sir_to_redo(struct ncb *np, int num, struct ccb *cp)
6372 struct scsi_cmnd *cmd = cp->cmd;
6373 struct tcb *tp = &np->target[cmd->device->id];
6374 struct lcb *lp = tp->lp[cmd->device->lun];
6375 struct list_head *qp;
6380 u_char s_status = INB (SS_PRT);
6383 ** Let the SCRIPTS processor skip all not yet started CCBs,
6384 ** and count disconnected CCBs. Since the busy queue is in
6385 ** the same order as the chip start queue, disconnected CCBs
6386 ** are before cp and busy ones after.
6389 qp = lp->busy_ccbq.prev;
6390 while (qp != &lp->busy_ccbq) {
6391 cp2 = list_entry(qp, struct ccb, link_ccbq);
6396 cp2->start.schedule.l_paddr =
6397 cpu_to_scr(NCB_SCRIPTH_PHYS (np, skip));
6399 lp->held_ccb = cp; /* Requeue when this one completes */
6400 disc_cnt = lp->queuedccbs - busy_cnt;
6404 default: /* Just for safety, should never happen */
6405 case SAM_STAT_TASK_SET_FULL:
6407 ** Decrease number of tags to the number of
6408 ** disconnected commands.
6412 if (bootverbose >= 1) {
6413 PRINT_ADDR(cmd, "QUEUE FULL! %d busy, %d disconnected "
6414 "CCBs\n", busy_cnt, disc_cnt);
6416 if (disc_cnt < lp->numtags) {
6417 lp->numtags = disc_cnt > 2 ? disc_cnt : 2;
6419 ncr_setup_tags (np, cmd->device);
6422 ** Requeue the command to the start queue.
6423 ** If any disconnected commands,
6425 ** Jump to reselect.
6427 cp->phys.header.savep = cp->startp;
6428 cp->host_status = HS_BUSY;
6429 cp->scsi_status = SAM_STAT_ILLEGAL;
6431 ncr_put_start_queue(np, cp);
6433 INB (nc_ctest2); /* Clear SIGP */
6434 OUTL_DSP (NCB_SCRIPT_PHYS (np, reselect));
6436 case SAM_STAT_COMMAND_TERMINATED:
6437 case SAM_STAT_CHECK_CONDITION:
6439 ** If we were requesting sense, give up.
6445 ** Device returned CHECK CONDITION status.
6446 ** Prepare all needed data strutures for getting
6451 cp->scsi_smsg2[0] = IDENTIFY(0, cmd->device->lun);
6452 cp->phys.smsg.addr = cpu_to_scr(CCB_PHYS (cp, scsi_smsg2));
6453 cp->phys.smsg.size = cpu_to_scr(1);
6458 cp->phys.cmd.addr = cpu_to_scr(CCB_PHYS (cp, sensecmd));
6459 cp->phys.cmd.size = cpu_to_scr(6);
6462 ** patch requested size into sense command
6464 cp->sensecmd[0] = 0x03;
6465 cp->sensecmd[1] = (cmd->device->lun & 0x7) << 5;
6466 cp->sensecmd[4] = sizeof(cp->sense_buf);
6471 memset(cp->sense_buf, 0, sizeof(cp->sense_buf));
6472 cp->phys.sense.addr = cpu_to_scr(CCB_PHYS(cp,sense_buf[0]));
6473 cp->phys.sense.size = cpu_to_scr(sizeof(cp->sense_buf));
6476 ** requeue the command.
6478 startp = cpu_to_scr(NCB_SCRIPTH_PHYS (np, sdata_in));
6480 cp->phys.header.savep = startp;
6481 cp->phys.header.goalp = startp + 24;
6482 cp->phys.header.lastp = startp;
6483 cp->phys.header.wgoalp = startp + 24;
6484 cp->phys.header.wlastp = startp;
6486 cp->host_status = HS_BUSY;
6487 cp->scsi_status = SAM_STAT_ILLEGAL;
6488 cp->auto_sense = s_status;
6490 cp->start.schedule.l_paddr =
6491 cpu_to_scr(NCB_SCRIPT_PHYS (np, select));
6494 ** Select without ATN for quirky devices.
6496 if (cmd->device->select_no_atn)
6497 cp->start.schedule.l_paddr =
6498 cpu_to_scr(NCB_SCRIPTH_PHYS (np, select_no_atn));
6500 ncr_put_start_queue(np, cp);
6502 OUTL_DSP (NCB_SCRIPT_PHYS (np, start));
6512 /*==========================================================
6515 ** ncr chip exception handler for programmed interrupts.
6518 **==========================================================
6521 void ncr_int_sir (struct ncb *np)
6524 u_char chg, ofs, per, fak, wide;
6525 u_char num = INB (nc_dsps);
6526 struct ccb *cp=NULL;
6527 u_long dsa = INL (nc_dsa);
6528 u_char target = INB (nc_sdid) & 0x0f;
6529 struct tcb *tp = &np->target[target];
6530 struct scsi_target *starget = tp->starget;
6532 if (DEBUG_FLAGS & DEBUG_TINY) printk ("I#%d", num);
6537 ** This is used for HP Zalon/53c720 where INTFLY
6538 ** operation is currently broken.
6540 ncr_wakeup_done(np);
6541 #ifdef SCSI_NCR_CCB_DONE_SUPPORT
6542 OUTL(nc_dsp, NCB_SCRIPT_PHYS (np, done_end) + 8);
6544 OUTL(nc_dsp, NCB_SCRIPT_PHYS (np, start));
6547 case SIR_RESEL_NO_MSG_IN:
6548 case SIR_RESEL_NO_IDENTIFY:
6550 ** If devices reselecting without sending an IDENTIFY
6551 ** message still exist, this should help.
6552 ** We just assume lun=0, 1 CCB, no tag.
6555 OUTL_DSP (scr_to_cpu(tp->lp[0]->jump_ccb[0]));
6559 case SIR_RESEL_BAD_TARGET: /* Will send a TARGET RESET message */
6560 case SIR_RESEL_BAD_LUN: /* Will send a TARGET RESET message */
6561 case SIR_RESEL_BAD_I_T_L_Q: /* Will send an ABORT TAG message */
6562 case SIR_RESEL_BAD_I_T_L: /* Will send an ABORT message */
6563 printk ("%s:%d: SIR %d, "
6564 "incorrect nexus identification on reselection\n",
6565 ncr_name (np), target, num);
6567 case SIR_DONE_OVERFLOW:
6568 printk ("%s:%d: SIR %d, "
6569 "CCB done queue overflow\n",
6570 ncr_name (np), target, num);
6572 case SIR_BAD_STATUS:
6574 if (!cp || CCB_PHYS (cp, phys) != dsa)
6576 ncr_sir_to_redo(np, num, cp);
6583 while (cp && (CCB_PHYS (cp, phys) != dsa))
6587 BUG_ON(cp != np->header.cp);
6589 if (!cp || cp != np->header.cp)
6594 /*-----------------------------------------------------------------------------
6596 ** Was Sie schon immer ueber transfermode negotiation wissen wollten ...
6597 ** ("Everything you've always wanted to know about transfer mode
6600 ** We try to negotiate sync and wide transfer only after
6601 ** a successful inquire command. We look at byte 7 of the
6602 ** inquire data to determine the capabilities of the target.
6604 ** When we try to negotiate, we append the negotiation message
6605 ** to the identify and (maybe) simple tag message.
6606 ** The host status field is set to HS_NEGOTIATE to mark this
6609 ** If the target doesn't answer this message immediately
6610 ** (as required by the standard), the SIR_NEGO_FAIL interrupt
6611 ** will be raised eventually.
6612 ** The handler removes the HS_NEGOTIATE status, and sets the
6613 ** negotiated value to the default (async / nowide).
6615 ** If we receive a matching answer immediately, we check it
6616 ** for validity, and set the values.
6618 ** If we receive a Reject message immediately, we assume the
6619 ** negotiation has failed, and fall back to standard values.
6621 ** If we receive a negotiation message while not in HS_NEGOTIATE
6622 ** state, it's a target initiated negotiation. We prepare a
6623 ** (hopefully) valid answer, set our parameters, and send back
6624 ** this answer to the target.
6626 ** If the target doesn't fetch the answer (no message out phase),
6627 ** we assume the negotiation has failed, and fall back to default
6630 ** When we set the values, we adjust them in all ccbs belonging
6631 ** to this target, in the controller's register, and in the "phys"
6632 ** field of the controller's struct ncb.
6634 ** Possible cases: hs sir msg_in value send goto
6635 ** We try to negotiate:
6636 ** -> target doesn't msgin NEG FAIL noop defa. - dispatch
6637 ** -> target rejected our msg NEG FAIL reject defa. - dispatch
6638 ** -> target answered (ok) NEG SYNC sdtr set - clrack
6639 ** -> target answered (!ok) NEG SYNC sdtr defa. REJ--->msg_bad
6640 ** -> target answered (ok) NEG WIDE wdtr set - clrack
6641 ** -> target answered (!ok) NEG WIDE wdtr defa. REJ--->msg_bad
6642 ** -> any other msgin NEG FAIL noop defa. - dispatch
6644 ** Target tries to negotiate:
6645 ** -> incoming message --- SYNC sdtr set SDTR -
6646 ** -> incoming message --- WIDE wdtr set WDTR -
6647 ** We sent our answer:
6648 ** -> target doesn't msgout --- PROTO ? defa. - dispatch
6650 **-----------------------------------------------------------------------------
6653 case SIR_NEGO_FAILED:
6654 /*-------------------------------------------------------
6656 ** Negotiation failed.
6657 ** Target doesn't send an answer message,
6658 ** or target rejected our message.
6660 ** Remove negotiation request.
6662 **-------------------------------------------------------
6664 OUTB (HS_PRT, HS_BUSY);
6668 case SIR_NEGO_PROTO:
6669 /*-------------------------------------------------------
6671 ** Negotiation failed.
6672 ** Target doesn't fetch the answer message.
6674 **-------------------------------------------------------
6677 if (DEBUG_FLAGS & DEBUG_NEGO) {
6678 PRINT_ADDR(cp->cmd, "negotiation failed sir=%x "
6679 "status=%x.\n", num, cp->nego_status);
6683 ** any error in negotiation:
6684 ** fall back to default mode.
6686 switch (cp->nego_status) {
6689 spi_period(starget) = 0;
6690 spi_offset(starget) = 0;
6691 ncr_setsync (np, cp, 0, 0xe0);
6695 spi_width(starget) = 0;
6696 ncr_setwide (np, cp, 0, 0);
6700 np->msgin [0] = NOP;
6701 np->msgout[0] = NOP;
6702 cp->nego_status = 0;
6706 if (DEBUG_FLAGS & DEBUG_NEGO) {
6707 ncr_print_msg(cp, "sync msgin", np->msgin);
6713 if (ofs==0) per=255;
6716 ** if target sends SDTR message,
6717 ** it CAN transfer synch.
6721 spi_support_sync(starget) = 1;
6724 ** check values against driver limits.
6727 if (per < np->minsync)
6728 {chg = 1; per = np->minsync;}
6729 if (per < tp->minsync)
6730 {chg = 1; per = tp->minsync;}
6731 if (ofs > tp->maxoffs)
6732 {chg = 1; ofs = tp->maxoffs;}
6735 ** Check against controller limits.
6740 ncr_getsync(np, per, &fak, &scntl3);
6753 if (DEBUG_FLAGS & DEBUG_NEGO) {
6754 PRINT_ADDR(cp->cmd, "sync: per=%d scntl3=0x%x ofs=%d "
6755 "fak=%d chg=%d.\n", per, scntl3, ofs, fak, chg);
6758 if (INB (HS_PRT) == HS_NEGOTIATE) {
6759 OUTB (HS_PRT, HS_BUSY);
6760 switch (cp->nego_status) {
6763 /* This was an answer message */
6765 /* Answer wasn't acceptable. */
6766 spi_period(starget) = 0;
6767 spi_offset(starget) = 0;
6768 ncr_setsync(np, cp, 0, 0xe0);
6769 OUTL_DSP(NCB_SCRIPT_PHYS (np, msg_bad));
6772 spi_period(starget) = per;
6773 spi_offset(starget) = ofs;
6774 ncr_setsync(np, cp, scntl3, (fak<<5)|ofs);
6775 OUTL_DSP(NCB_SCRIPT_PHYS (np, clrack));
6780 spi_width(starget) = 0;
6781 ncr_setwide(np, cp, 0, 0);
6787 ** It was a request. Set value and
6788 ** prepare an answer message
6791 spi_period(starget) = per;
6792 spi_offset(starget) = ofs;
6793 ncr_setsync(np, cp, scntl3, (fak<<5)|ofs);
6795 spi_populate_sync_msg(np->msgout, per, ofs);
6796 cp->nego_status = NS_SYNC;
6798 if (DEBUG_FLAGS & DEBUG_NEGO) {
6799 ncr_print_msg(cp, "sync msgout", np->msgout);
6803 OUTL_DSP (NCB_SCRIPT_PHYS (np, msg_bad));
6806 np->msgin [0] = NOP;
6812 ** Wide request message received.
6814 if (DEBUG_FLAGS & DEBUG_NEGO) {
6815 ncr_print_msg(cp, "wide msgin", np->msgin);
6819 ** get requested values.
6823 wide = np->msgin[3];
6826 ** if target sends WDTR message,
6827 ** it CAN transfer wide.
6830 if (wide && starget)
6831 spi_support_wide(starget) = 1;
6834 ** check values against driver limits.
6837 if (wide > tp->usrwide)
6838 {chg = 1; wide = tp->usrwide;}
6840 if (DEBUG_FLAGS & DEBUG_NEGO) {
6841 PRINT_ADDR(cp->cmd, "wide: wide=%d chg=%d.\n", wide,
6845 if (INB (HS_PRT) == HS_NEGOTIATE) {
6846 OUTB (HS_PRT, HS_BUSY);
6847 switch (cp->nego_status) {
6851 ** This was an answer message
6854 /* Answer wasn't acceptable. */
6855 spi_width(starget) = 0;
6856 ncr_setwide(np, cp, 0, 1);
6857 OUTL_DSP (NCB_SCRIPT_PHYS (np, msg_bad));
6860 spi_width(starget) = wide;
6861 ncr_setwide(np, cp, wide, 1);
6862 OUTL_DSP (NCB_SCRIPT_PHYS (np, clrack));
6867 spi_period(starget) = 0;
6868 spi_offset(starget) = 0;
6869 ncr_setsync(np, cp, 0, 0xe0);
6875 ** It was a request, set value and
6876 ** prepare an answer message
6879 spi_width(starget) = wide;
6880 ncr_setwide(np, cp, wide, 1);
6881 spi_populate_width_msg(np->msgout, wide);
6883 np->msgin [0] = NOP;
6885 cp->nego_status = NS_WIDE;
6887 if (DEBUG_FLAGS & DEBUG_NEGO) {
6888 ncr_print_msg(cp, "wide msgout", np->msgin);
6892 /*--------------------------------------------------------------------
6894 ** Processing of special messages
6896 **--------------------------------------------------------------------
6899 case SIR_REJECT_RECEIVED:
6900 /*-----------------------------------------------
6902 ** We received a MESSAGE_REJECT.
6904 **-----------------------------------------------
6907 PRINT_ADDR(cp->cmd, "MESSAGE_REJECT received (%x:%x).\n",
6908 (unsigned)scr_to_cpu(np->lastmsg), np->msgout[0]);
6911 case SIR_REJECT_SENT:
6912 /*-----------------------------------------------
6914 ** We received an unknown message
6916 **-----------------------------------------------
6919 ncr_print_msg(cp, "MESSAGE_REJECT sent for", np->msgin);
6922 /*--------------------------------------------------------------------
6924 ** Processing of special messages
6926 **--------------------------------------------------------------------
6929 case SIR_IGN_RESIDUE:
6930 /*-----------------------------------------------
6932 ** We received an IGNORE RESIDUE message,
6933 ** which couldn't be handled by the script.
6935 **-----------------------------------------------
6938 PRINT_ADDR(cp->cmd, "IGNORE_WIDE_RESIDUE received, but not yet "
6942 case SIR_MISSING_SAVE:
6943 /*-----------------------------------------------
6945 ** We received an DISCONNECT message,
6946 ** but the datapointer wasn't saved before.
6948 **-----------------------------------------------
6951 PRINT_ADDR(cp->cmd, "DISCONNECT received, but datapointer "
6952 "not saved: data=%x save=%x goal=%x.\n",
6953 (unsigned) INL (nc_temp),
6954 (unsigned) scr_to_cpu(np->header.savep),
6955 (unsigned) scr_to_cpu(np->header.goalp));
6964 /*==========================================================
6967 ** Acquire a control block
6970 **==========================================================
6973 static struct ccb *ncr_get_ccb(struct ncb *np, struct scsi_cmnd *cmd)
6975 u_char tn = cmd->device->id;
6976 u_char ln = cmd->device->lun;
6977 struct tcb *tp = &np->target[tn];
6978 struct lcb *lp = tp->lp[ln];
6979 u_char tag = NO_TAG;
6980 struct ccb *cp = NULL;
6983 ** Lun structure available ?
6986 struct list_head *qp;
6988 ** Keep from using more tags than we can handle.
6990 if (lp->usetags && lp->busyccbs >= lp->maxnxs)
6994 ** Allocate a new CCB if needed.
6996 if (list_empty(&lp->free_ccbq))
6997 ncr_alloc_ccb(np, tn, ln);
7000 ** Look for free CCB
7002 qp = ncr_list_pop(&lp->free_ccbq);
7004 cp = list_entry(qp, struct ccb, link_ccbq);
7006 PRINT_ADDR(cmd, "ccb free list corrupted "
7010 list_add_tail(qp, &lp->wait_ccbq);
7016 ** If a CCB is available,
7017 ** Get a tag for this nexus if required.
7021 tag = lp->cb_tags[lp->ia_tag];
7023 else if (lp->actccbs > 0)
7028 ** if nothing available, take the default.
7034 ** Wait until available.
7038 if (flags & SCSI_NOSLEEP) break;
7039 if (tsleep ((caddr_t)cp, PRIBIO|PCATCH, "ncr", 0))
7050 ** Move to next available tag if tag used.
7053 if (tag != NO_TAG) {
7055 if (lp->ia_tag == MAX_TAGS)
7057 lp->tags_umap |= (((tagmap_t) 1) << tag);
7062 ** Remember all informations needed to free this CCB.
7068 if (DEBUG_FLAGS & DEBUG_TAGS) {
7069 PRINT_ADDR(cmd, "ccb @%p using tag %d.\n", cp, tag);
7075 /*==========================================================
7078 ** Release one control block
7081 **==========================================================
7084 static void ncr_free_ccb (struct ncb *np, struct ccb *cp)
7086 struct tcb *tp = &np->target[cp->target];
7087 struct lcb *lp = tp->lp[cp->lun];
7089 if (DEBUG_FLAGS & DEBUG_TAGS) {
7090 PRINT_ADDR(cp->cmd, "ccb @%p freeing tag %d.\n", cp, cp->tag);
7094 ** If lun control block available,
7095 ** decrement active commands and increment credit,
7096 ** free the tag if any and remove the JUMP for reselect.
7099 if (cp->tag != NO_TAG) {
7100 lp->cb_tags[lp->if_tag++] = cp->tag;
7101 if (lp->if_tag == MAX_TAGS)
7103 lp->tags_umap &= ~(((tagmap_t) 1) << cp->tag);
7104 lp->tags_smap &= lp->tags_umap;
7105 lp->jump_ccb[cp->tag] =
7106 cpu_to_scr(NCB_SCRIPTH_PHYS(np, bad_i_t_l_q));
7109 cpu_to_scr(NCB_SCRIPTH_PHYS(np, bad_i_t_l));
7114 ** Make this CCB available.
7119 list_move(&cp->link_ccbq, &lp->free_ccbq);
7125 cp -> host_status = HS_IDLE;
7134 wakeup ((caddr_t) cp);
7139 #define ncr_reg_bus_addr(r) (np->paddr + offsetof (struct ncr_reg, r))
7141 /*------------------------------------------------------------------------
7142 ** Initialize the fixed part of a CCB structure.
7143 **------------------------------------------------------------------------
7144 **------------------------------------------------------------------------
7146 static void ncr_init_ccb(struct ncb *np, struct ccb *cp)
7148 ncrcmd copy_4 = np->features & FE_PFEN ? SCR_COPY(4) : SCR_COPY_F(4);
7151 ** Remember virtual and bus address of this ccb.
7153 cp->p_ccb = vtobus(cp);
7154 cp->phys.header.cp = cp;
7157 ** This allows list_del to work for the default ccb.
7159 INIT_LIST_HEAD(&cp->link_ccbq);
7162 ** Initialyze the start and restart launch script.
7164 ** COPY(4) @(...p_phys), @(dsa)
7165 ** JUMP @(sched_point)
7167 cp->start.setup_dsa[0] = cpu_to_scr(copy_4);
7168 cp->start.setup_dsa[1] = cpu_to_scr(CCB_PHYS(cp, start.p_phys));
7169 cp->start.setup_dsa[2] = cpu_to_scr(ncr_reg_bus_addr(nc_dsa));
7170 cp->start.schedule.l_cmd = cpu_to_scr(SCR_JUMP);
7171 cp->start.p_phys = cpu_to_scr(CCB_PHYS(cp, phys));
7173 memcpy(&cp->restart, &cp->start, sizeof(cp->restart));
7175 cp->start.schedule.l_paddr = cpu_to_scr(NCB_SCRIPT_PHYS (np, idle));
7176 cp->restart.schedule.l_paddr = cpu_to_scr(NCB_SCRIPTH_PHYS (np, abort));
7180 /*------------------------------------------------------------------------
7181 ** Allocate a CCB and initialize its fixed part.
7182 **------------------------------------------------------------------------
7183 **------------------------------------------------------------------------
7185 static void ncr_alloc_ccb(struct ncb *np, u_char tn, u_char ln)
7187 struct tcb *tp = &np->target[tn];
7188 struct lcb *lp = tp->lp[ln];
7189 struct ccb *cp = NULL;
7192 ** Allocate memory for this CCB.
7194 cp = m_calloc_dma(sizeof(struct ccb), "CCB");
7199 ** Count it and initialyze it.
7203 memset(cp, 0, sizeof (*cp));
7204 ncr_init_ccb(np, cp);
7207 ** Chain into wakeup list and free ccb queue and take it
7208 ** into account for tagged commands.
7210 cp->link_ccb = np->ccb->link_ccb;
7211 np->ccb->link_ccb = cp;
7213 list_add(&cp->link_ccbq, &lp->free_ccbq);
7216 /*==========================================================
7219 ** Allocation of resources for Targets/Luns/Tags.
7222 **==========================================================
7226 /*------------------------------------------------------------------------
7227 ** Target control block initialisation.
7228 **------------------------------------------------------------------------
7229 ** This data structure is fully initialized after a SCSI command
7230 ** has been successfully completed for this target.
7231 ** It contains a SCRIPT that is called on target reselection.
7232 **------------------------------------------------------------------------
7234 static void ncr_init_tcb (struct ncb *np, u_char tn)
7236 struct tcb *tp = &np->target[tn];
7237 ncrcmd copy_1 = np->features & FE_PFEN ? SCR_COPY(1) : SCR_COPY_F(1);
7242 ** Jump to next tcb if SFBR does not match this target.
7243 ** JUMP IF (SFBR != #target#), @(next tcb)
7245 tp->jump_tcb.l_cmd =
7246 cpu_to_scr((SCR_JUMP ^ IFFALSE (DATA (0x80 + tn))));
7247 tp->jump_tcb.l_paddr = np->jump_tcb[th].l_paddr;
7250 ** Load the synchronous transfer register.
7251 ** COPY @(tp->sval), @(sxfer)
7253 tp->getscr[0] = cpu_to_scr(copy_1);
7254 tp->getscr[1] = cpu_to_scr(vtobus (&tp->sval));
7255 #ifdef SCSI_NCR_BIG_ENDIAN
7256 tp->getscr[2] = cpu_to_scr(ncr_reg_bus_addr(nc_sxfer) ^ 3);
7258 tp->getscr[2] = cpu_to_scr(ncr_reg_bus_addr(nc_sxfer));
7262 ** Load the timing register.
7263 ** COPY @(tp->wval), @(scntl3)
7265 tp->getscr[3] = cpu_to_scr(copy_1);
7266 tp->getscr[4] = cpu_to_scr(vtobus (&tp->wval));
7267 #ifdef SCSI_NCR_BIG_ENDIAN
7268 tp->getscr[5] = cpu_to_scr(ncr_reg_bus_addr(nc_scntl3) ^ 3);
7270 tp->getscr[5] = cpu_to_scr(ncr_reg_bus_addr(nc_scntl3));
7274 ** Get the IDENTIFY message and the lun.
7275 ** CALL @script(resel_lun)
7277 tp->call_lun.l_cmd = cpu_to_scr(SCR_CALL);
7278 tp->call_lun.l_paddr = cpu_to_scr(NCB_SCRIPT_PHYS (np, resel_lun));
7281 ** Look for the lun control block of this nexus.
7283 ** JUMP ^ IFTRUE (MASK (i, 3)), @(next_lcb)
7285 for (i = 0 ; i < 4 ; i++) {
7286 tp->jump_lcb[i].l_cmd =
7287 cpu_to_scr((SCR_JUMP ^ IFTRUE (MASK (i, 3))));
7288 tp->jump_lcb[i].l_paddr =
7289 cpu_to_scr(NCB_SCRIPTH_PHYS (np, bad_identify));
7293 ** Link this target control block to the JUMP chain.
7295 np->jump_tcb[th].l_paddr = cpu_to_scr(vtobus (&tp->jump_tcb));
7298 ** These assert's should be moved at driver initialisations.
7300 #ifdef SCSI_NCR_BIG_ENDIAN
7301 BUG_ON(((offsetof(struct ncr_reg, nc_sxfer) ^
7302 offsetof(struct tcb , sval )) &3) != 3);
7303 BUG_ON(((offsetof(struct ncr_reg, nc_scntl3) ^
7304 offsetof(struct tcb , wval )) &3) != 3);
7306 BUG_ON(((offsetof(struct ncr_reg, nc_sxfer) ^
7307 offsetof(struct tcb , sval )) &3) != 0);
7308 BUG_ON(((offsetof(struct ncr_reg, nc_scntl3) ^
7309 offsetof(struct tcb , wval )) &3) != 0);
7314 /*------------------------------------------------------------------------
7315 ** Lun control block allocation and initialization.
7316 **------------------------------------------------------------------------
7317 ** This data structure is allocated and initialized after a SCSI
7318 ** command has been successfully completed for this target/lun.
7319 **------------------------------------------------------------------------
7321 static struct lcb *ncr_alloc_lcb (struct ncb *np, u_char tn, u_char ln)
7323 struct tcb *tp = &np->target[tn];
7324 struct lcb *lp = tp->lp[ln];
7325 ncrcmd copy_4 = np->features & FE_PFEN ? SCR_COPY(4) : SCR_COPY_F(4);
7329 ** Already done, return.
7335 ** Allocate the lcb.
7337 lp = m_calloc_dma(sizeof(struct lcb), "LCB");
7340 memset(lp, 0, sizeof(*lp));
7344 ** Initialize the target control block if not yet.
7346 if (!tp->jump_tcb.l_cmd)
7347 ncr_init_tcb(np, tn);
7350 ** Initialize the CCB queue headers.
7352 INIT_LIST_HEAD(&lp->free_ccbq);
7353 INIT_LIST_HEAD(&lp->busy_ccbq);
7354 INIT_LIST_HEAD(&lp->wait_ccbq);
7355 INIT_LIST_HEAD(&lp->skip_ccbq);
7358 ** Set max CCBs to 1 and use the default 1 entry
7359 ** jump table by default.
7362 lp->jump_ccb = &lp->jump_ccb_0;
7363 lp->p_jump_ccb = cpu_to_scr(vtobus(lp->jump_ccb));
7366 ** Initilialyze the reselect script:
7368 ** Jump to next lcb if SFBR does not match this lun.
7369 ** Load TEMP with the CCB direct jump table bus address.
7370 ** Get the SIMPLE TAG message and the tag.
7372 ** JUMP IF (SFBR != #lun#), @(next lcb)
7373 ** COPY @(lp->p_jump_ccb), @(temp)
7374 ** JUMP @script(resel_notag)
7376 lp->jump_lcb.l_cmd =
7377 cpu_to_scr((SCR_JUMP ^ IFFALSE (MASK (0x80+ln, 0xff))));
7378 lp->jump_lcb.l_paddr = tp->jump_lcb[lh].l_paddr;
7380 lp->load_jump_ccb[0] = cpu_to_scr(copy_4);
7381 lp->load_jump_ccb[1] = cpu_to_scr(vtobus (&lp->p_jump_ccb));
7382 lp->load_jump_ccb[2] = cpu_to_scr(ncr_reg_bus_addr(nc_temp));
7384 lp->jump_tag.l_cmd = cpu_to_scr(SCR_JUMP);
7385 lp->jump_tag.l_paddr = cpu_to_scr(NCB_SCRIPT_PHYS (np, resel_notag));
7388 ** Link this lun control block to the JUMP chain.
7390 tp->jump_lcb[lh].l_paddr = cpu_to_scr(vtobus (&lp->jump_lcb));
7393 ** Initialize command queuing control.
7403 /*------------------------------------------------------------------------
7404 ** Lun control block setup on INQUIRY data received.
7405 **------------------------------------------------------------------------
7406 ** We only support WIDE, SYNC for targets and CMDQ for logical units.
7407 ** This setup is done on each INQUIRY since we are expecting user
7408 ** will play with CHANGE DEFINITION commands. :-)
7409 **------------------------------------------------------------------------
7411 static struct lcb *ncr_setup_lcb (struct ncb *np, struct scsi_device *sdev)
7413 unsigned char tn = sdev->id, ln = sdev->lun;
7414 struct tcb *tp = &np->target[tn];
7415 struct lcb *lp = tp->lp[ln];
7417 /* If no lcb, try to allocate it. */
7418 if (!lp && !(lp = ncr_alloc_lcb(np, tn, ln)))
7422 ** If unit supports tagged commands, allocate the
7423 ** CCB JUMP table if not yet.
7425 if (sdev->tagged_supported && lp->jump_ccb == &lp->jump_ccb_0) {
7427 lp->jump_ccb = m_calloc_dma(256, "JUMP_CCB");
7428 if (!lp->jump_ccb) {
7429 lp->jump_ccb = &lp->jump_ccb_0;
7432 lp->p_jump_ccb = cpu_to_scr(vtobus(lp->jump_ccb));
7433 for (i = 0 ; i < 64 ; i++)
7435 cpu_to_scr(NCB_SCRIPTH_PHYS (np, bad_i_t_l_q));
7436 for (i = 0 ; i < MAX_TAGS ; i++)
7438 lp->maxnxs = MAX_TAGS;
7439 lp->tags_stime = jiffies + 3*HZ;
7440 ncr_setup_tags (np, sdev);
7448 /*==========================================================
7451 ** Build Scatter Gather Block
7454 **==========================================================
7456 ** The transfer area may be scattered among
7457 ** several non adjacent physical pages.
7459 ** We may use MAX_SCATTER blocks.
7461 **----------------------------------------------------------
7465 ** We try to reduce the number of interrupts caused
7466 ** by unexpected phase changes due to disconnects.
7467 ** A typical harddisk may disconnect before ANY block.
7468 ** If we wanted to avoid unexpected phase changes at all
7469 ** we had to use a break point every 512 bytes.
7470 ** Of course the number of scatter/gather blocks is
7472 ** Under Linux, the scatter/gatter blocks are provided by
7473 ** the generic driver. We just have to copy addresses and
7474 ** sizes to the data segment array.
7477 static int ncr_scatter(struct ncb *np, struct ccb *cp, struct scsi_cmnd *cmd)
7480 int use_sg = scsi_sg_count(cmd);
7484 use_sg = map_scsi_sg_data(np, cmd);
7486 struct scatterlist *sg;
7487 struct scr_tblmove *data;
7489 if (use_sg > MAX_SCATTER) {
7490 unmap_scsi_data(np, cmd);
7494 data = &cp->phys.data[MAX_SCATTER - use_sg];
7496 scsi_for_each_sg(cmd, sg, use_sg, segment) {
7497 dma_addr_t baddr = sg_dma_address(sg);
7498 unsigned int len = sg_dma_len(sg);
7500 ncr_build_sge(np, &data[segment], baddr, len);
7501 cp->data_len += len;
7509 /*==========================================================
7512 ** Test the bus snoop logic :-(
7514 ** Has to be called with interrupts disabled.
7517 **==========================================================
7520 static int __init ncr_regtest (struct ncb* np)
7522 register volatile u32 data;
7524 ** ncr registers may NOT be cached.
7525 ** write 0xffffffff to a read only register area,
7526 ** and try to read it back.
7529 OUTL_OFF(offsetof(struct ncr_reg, nc_dstat), data);
7530 data = INL_OFF(offsetof(struct ncr_reg, nc_dstat));
7532 if (data == 0xffffffff) {
7534 if ((data & 0xe2f0fffd) != 0x02000080) {
7536 printk ("CACHE TEST FAILED: reg dstat-sstat2 readback %x.\n",
7543 static int __init ncr_snooptest (struct ncb* np)
7545 u32 ncr_rd, ncr_wr, ncr_bk, host_rd, host_wr, pc;
7548 err |= ncr_regtest (np);
7554 pc = NCB_SCRIPTH_PHYS (np, snooptest);
7558 ** Set memory and register.
7560 np->ncr_cache = cpu_to_scr(host_wr);
7561 OUTL (nc_temp, ncr_wr);
7563 ** Start script (exchange values)
7567 ** Wait 'til done (with timeout)
7569 for (i=0; i<NCR_SNOOP_TIMEOUT; i++)
7570 if (INB(nc_istat) & (INTF|SIP|DIP))
7573 ** Save termination position.
7577 ** Read memory and register.
7579 host_rd = scr_to_cpu(np->ncr_cache);
7580 ncr_rd = INL (nc_scratcha);
7581 ncr_bk = INL (nc_temp);
7585 ncr_chip_reset(np, 100);
7587 ** check for timeout
7589 if (i>=NCR_SNOOP_TIMEOUT) {
7590 printk ("CACHE TEST FAILED: timeout.\n");
7594 ** Check termination position.
7596 if (pc != NCB_SCRIPTH_PHYS (np, snoopend)+8) {
7597 printk ("CACHE TEST FAILED: script execution failed.\n");
7598 printk ("start=%08lx, pc=%08lx, end=%08lx\n",
7599 (u_long) NCB_SCRIPTH_PHYS (np, snooptest), (u_long) pc,
7600 (u_long) NCB_SCRIPTH_PHYS (np, snoopend) +8);
7606 if (host_wr != ncr_rd) {
7607 printk ("CACHE TEST FAILED: host wrote %d, ncr read %d.\n",
7608 (int) host_wr, (int) ncr_rd);
7611 if (host_rd != ncr_wr) {
7612 printk ("CACHE TEST FAILED: ncr wrote %d, host read %d.\n",
7613 (int) ncr_wr, (int) host_rd);
7616 if (ncr_bk != ncr_wr) {
7617 printk ("CACHE TEST FAILED: ncr wrote %d, read back %d.\n",
7618 (int) ncr_wr, (int) ncr_bk);
7624 /*==========================================================
7626 ** Determine the ncr's clock frequency.
7627 ** This is essential for the negotiation
7628 ** of the synchronous transfer rate.
7630 **==========================================================
7632 ** Note: we have to return the correct value.
7633 ** THERE IS NO SAFE DEFAULT VALUE.
7635 ** Most NCR/SYMBIOS boards are delivered with a 40 Mhz clock.
7636 ** 53C860 and 53C875 rev. 1 support fast20 transfers but
7637 ** do not have a clock doubler and so are provided with a
7638 ** 80 MHz clock. All other fast20 boards incorporate a doubler
7639 ** and so should be delivered with a 40 MHz clock.
7640 ** The future fast40 chips (895/895) use a 40 Mhz base clock
7641 ** and provide a clock quadrupler (160 Mhz). The code below
7642 ** tries to deal as cleverly as possible with all this stuff.
7644 **----------------------------------------------------------
7648 * Select NCR SCSI clock frequency
7650 static void ncr_selectclock(struct ncb *np, u_char scntl3)
7652 if (np->multiplier < 2) {
7653 OUTB(nc_scntl3, scntl3);
7657 if (bootverbose >= 2)
7658 printk ("%s: enabling clock multiplier\n", ncr_name(np));
7660 OUTB(nc_stest1, DBLEN); /* Enable clock multiplier */
7661 if (np->multiplier > 2) { /* Poll bit 5 of stest4 for quadrupler */
7663 while (!(INB(nc_stest4) & LCKFRQ) && --i > 0)
7666 printk("%s: the chip cannot lock the frequency\n", ncr_name(np));
7667 } else /* Wait 20 micro-seconds for doubler */
7669 OUTB(nc_stest3, HSC); /* Halt the scsi clock */
7670 OUTB(nc_scntl3, scntl3);
7671 OUTB(nc_stest1, (DBLEN|DBLSEL));/* Select clock multiplier */
7672 OUTB(nc_stest3, 0x00); /* Restart scsi clock */
7677 * calculate NCR SCSI clock frequency (in KHz)
7679 static unsigned __init ncrgetfreq (struct ncb *np, int gen)
7685 * Measure GEN timer delay in order
7686 * to calculate SCSI clock frequency
7688 * This code will never execute too
7689 * many loop iterations (if DELAY is
7690 * reasonably correct). It could get
7691 * too low a delay (too high a freq.)
7692 * if the CPU is slow executing the
7693 * loop for some reason (an NMI, for
7694 * example). For this reason we will
7695 * if multiple measurements are to be
7696 * performed trust the higher delay
7697 * (lower frequency returned).
7699 OUTB (nc_stest1, 0); /* make sure clock doubler is OFF */
7700 OUTW (nc_sien , 0); /* mask all scsi interrupts */
7701 (void) INW (nc_sist); /* clear pending scsi interrupt */
7702 OUTB (nc_dien , 0); /* mask all dma interrupts */
7703 (void) INW (nc_sist); /* another one, just to be sure :) */
7704 OUTB (nc_scntl3, 4); /* set pre-scaler to divide by 3 */
7705 OUTB (nc_stime1, 0); /* disable general purpose timer */
7706 OUTB (nc_stime1, gen); /* set to nominal delay of 1<<gen * 125us */
7707 while (!(INW(nc_sist) & GEN) && ms++ < 100000) {
7708 for (count = 0; count < 10; count ++)
7709 udelay(100); /* count ms */
7711 OUTB (nc_stime1, 0); /* disable general purpose timer */
7713 * set prescaler to divide by whatever 0 means
7714 * 0 ought to choose divide by 2, but appears
7715 * to set divide by 3.5 mode in my 53c810 ...
7717 OUTB (nc_scntl3, 0);
7719 if (bootverbose >= 2)
7720 printk ("%s: Delay (GEN=%d): %u msec\n", ncr_name(np), gen, ms);
7722 * adjust for prescaler, and convert into KHz
7724 return ms ? ((1 << gen) * 4340) / ms : 0;
7728 * Get/probe NCR SCSI clock frequency
7730 static void __init ncr_getclock (struct ncb *np, int mult)
7732 unsigned char scntl3 = INB(nc_scntl3);
7733 unsigned char stest1 = INB(nc_stest1);
7740 ** True with 875 or 895 with clock multiplier selected
7742 if (mult > 1 && (stest1 & (DBLEN+DBLSEL)) == DBLEN+DBLSEL) {
7743 if (bootverbose >= 2)
7744 printk ("%s: clock multiplier found\n", ncr_name(np));
7745 np->multiplier = mult;
7749 ** If multiplier not found or scntl3 not 7,5,3,
7750 ** reset chip and get frequency from general purpose timer.
7751 ** Otherwise trust scntl3 BIOS setting.
7753 if (np->multiplier != mult || (scntl3 & 7) < 3 || !(scntl3 & 1)) {
7756 ncr_chip_reset(np, 5);
7758 (void) ncrgetfreq (np, 11); /* throw away first result */
7759 f1 = ncrgetfreq (np, 11);
7760 f2 = ncrgetfreq (np, 11);
7763 printk ("%s: NCR clock is %uKHz, %uKHz\n", ncr_name(np), f1, f2);
7765 if (f1 > f2) f1 = f2; /* trust lower result */
7767 if (f1 < 45000) f1 = 40000;
7768 else if (f1 < 55000) f1 = 50000;
7771 if (f1 < 80000 && mult > 1) {
7772 if (bootverbose >= 2)
7773 printk ("%s: clock multiplier assumed\n", ncr_name(np));
7774 np->multiplier = mult;
7777 if ((scntl3 & 7) == 3) f1 = 40000;
7778 else if ((scntl3 & 7) == 5) f1 = 80000;
7781 f1 /= np->multiplier;
7785 ** Compute controller synchronous parameters.
7787 f1 *= np->multiplier;
7791 /*===================== LINUX ENTRY POINTS SECTION ==========================*/
7793 static int ncr53c8xx_slave_alloc(struct scsi_device *device)
7795 struct Scsi_Host *host = device->host;
7796 struct ncb *np = ((struct host_data *) host->hostdata)->ncb;
7797 struct tcb *tp = &np->target[device->id];
7798 tp->starget = device->sdev_target;
7803 static int ncr53c8xx_slave_configure(struct scsi_device *device)
7805 struct Scsi_Host *host = device->host;
7806 struct ncb *np = ((struct host_data *) host->hostdata)->ncb;
7807 struct tcb *tp = &np->target[device->id];
7808 struct lcb *lp = tp->lp[device->lun];
7809 int numtags, depth_to_use;
7811 ncr_setup_lcb(np, device);
7814 ** Select queue depth from driver setup.
7815 ** Donnot use more than configured by user.
7817 ** Donnot use more than our maximum.
7819 numtags = device_queue_depth(np->unit, device->id, device->lun);
7820 if (numtags > tp->usrtags)
7821 numtags = tp->usrtags;
7822 if (!device->tagged_supported)
7824 depth_to_use = numtags;
7825 if (depth_to_use < 2)
7827 if (depth_to_use > MAX_TAGS)
7828 depth_to_use = MAX_TAGS;
7830 scsi_change_queue_depth(device, depth_to_use);
7833 ** Since the queue depth is not tunable under Linux,
7834 ** we need to know this value in order not to
7835 ** announce stupid things to user.
7837 ** XXX(hch): As of Linux 2.6 it certainly _is_ tunable..
7838 ** In fact we just tuned it, or did I miss
7839 ** something important? :)
7842 lp->numtags = lp->maxtags = numtags;
7843 lp->scdev_depth = depth_to_use;
7845 ncr_setup_tags (np, device);
7847 #ifdef DEBUG_NCR53C8XX
7848 printk("ncr53c8xx_select_queue_depth: host=%d, id=%d, lun=%d, depth=%d\n",
7849 np->unit, device->id, device->lun, depth_to_use);
7852 if (spi_support_sync(device->sdev_target) &&
7853 !spi_initial_dv(device->sdev_target))
7854 spi_dv_device(device);
7858 static int ncr53c8xx_queue_command_lck (struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
7860 struct ncb *np = ((struct host_data *) cmd->device->host->hostdata)->ncb;
7861 unsigned long flags;
7864 #ifdef DEBUG_NCR53C8XX
7865 printk("ncr53c8xx_queue_command\n");
7868 cmd->scsi_done = done;
7869 cmd->host_scribble = NULL;
7870 cmd->__data_mapped = 0;
7871 cmd->__data_mapping = 0;
7873 spin_lock_irqsave(&np->smp_lock, flags);
7875 if ((sts = ncr_queue_command(np, cmd)) != DID_OK) {
7876 set_host_byte(cmd, sts);
7877 #ifdef DEBUG_NCR53C8XX
7878 printk("ncr53c8xx : command not queued - result=%d\n", sts);
7881 #ifdef DEBUG_NCR53C8XX
7883 printk("ncr53c8xx : command successfully queued\n");
7886 spin_unlock_irqrestore(&np->smp_lock, flags);
7888 if (sts != DID_OK) {
7889 unmap_scsi_data(np, cmd);
7897 static DEF_SCSI_QCMD(ncr53c8xx_queue_command)
7899 irqreturn_t ncr53c8xx_intr(int irq, void *dev_id)
7901 unsigned long flags;
7902 struct Scsi_Host *shost = (struct Scsi_Host *)dev_id;
7903 struct host_data *host_data = (struct host_data *)shost->hostdata;
7904 struct ncb *np = host_data->ncb;
7905 struct scsi_cmnd *done_list;
7907 #ifdef DEBUG_NCR53C8XX
7908 printk("ncr53c8xx : interrupt received\n");
7911 if (DEBUG_FLAGS & DEBUG_TINY) printk ("[");
7913 spin_lock_irqsave(&np->smp_lock, flags);
7915 done_list = np->done_list;
7916 np->done_list = NULL;
7917 spin_unlock_irqrestore(&np->smp_lock, flags);
7919 if (DEBUG_FLAGS & DEBUG_TINY) printk ("]\n");
7922 ncr_flush_done_cmds(done_list);
7926 static void ncr53c8xx_timeout(struct timer_list *t)
7928 struct ncb *np = from_timer(np, t, timer);
7929 unsigned long flags;
7930 struct scsi_cmnd *done_list;
7932 spin_lock_irqsave(&np->smp_lock, flags);
7934 done_list = np->done_list;
7935 np->done_list = NULL;
7936 spin_unlock_irqrestore(&np->smp_lock, flags);
7939 ncr_flush_done_cmds(done_list);
7942 static int ncr53c8xx_bus_reset(struct scsi_cmnd *cmd)
7944 struct ncb *np = ((struct host_data *) cmd->device->host->hostdata)->ncb;
7946 unsigned long flags;
7947 struct scsi_cmnd *done_list;
7950 * If the mid-level driver told us reset is synchronous, it seems
7951 * that we must call the done() callback for the involved command,
7952 * even if this command was not queued to the low-level driver,
7953 * before returning SUCCESS.
7956 spin_lock_irqsave(&np->smp_lock, flags);
7957 sts = ncr_reset_bus(np);
7959 done_list = np->done_list;
7960 np->done_list = NULL;
7961 spin_unlock_irqrestore(&np->smp_lock, flags);
7963 ncr_flush_done_cmds(done_list);
7970 ** Scsi command waiting list management.
7972 ** It may happen that we cannot insert a scsi command into the start queue,
7973 ** in the following circumstances.
7974 ** Too few preallocated ccb(s),
7975 ** maxtags < cmd_per_lun of the Linux host control block,
7977 ** Such scsi commands are inserted into a waiting list.
7978 ** When a scsi command complete, we try to requeue the commands of the
7982 #define next_wcmd host_scribble
7984 static void insert_into_waiting_list(struct ncb *np, struct scsi_cmnd *cmd)
7986 struct scsi_cmnd *wcmd;
7988 #ifdef DEBUG_WAITING_LIST
7989 printk("%s: cmd %lx inserted into waiting list\n", ncr_name(np), (u_long) cmd);
7991 cmd->next_wcmd = NULL;
7992 if (!(wcmd = np->waiting_list)) np->waiting_list = cmd;
7994 while (wcmd->next_wcmd)
7995 wcmd = (struct scsi_cmnd *) wcmd->next_wcmd;
7996 wcmd->next_wcmd = (char *) cmd;
8000 static struct scsi_cmnd *retrieve_from_waiting_list(int to_remove, struct ncb *np, struct scsi_cmnd *cmd)
8002 struct scsi_cmnd **pcmd = &np->waiting_list;
8007 *pcmd = (struct scsi_cmnd *) cmd->next_wcmd;
8008 cmd->next_wcmd = NULL;
8010 #ifdef DEBUG_WAITING_LIST
8011 printk("%s: cmd %lx retrieved from waiting list\n", ncr_name(np), (u_long) cmd);
8015 pcmd = (struct scsi_cmnd **) &(*pcmd)->next_wcmd;
8020 static void process_waiting_list(struct ncb *np, int sts)
8022 struct scsi_cmnd *waiting_list, *wcmd;
8024 waiting_list = np->waiting_list;
8025 np->waiting_list = NULL;
8027 #ifdef DEBUG_WAITING_LIST
8028 if (waiting_list) printk("%s: waiting_list=%lx processing sts=%d\n", ncr_name(np), (u_long) waiting_list, sts);
8030 while ((wcmd = waiting_list) != NULL) {
8031 waiting_list = (struct scsi_cmnd *) wcmd->next_wcmd;
8032 wcmd->next_wcmd = NULL;
8033 if (sts == DID_OK) {
8034 #ifdef DEBUG_WAITING_LIST
8035 printk("%s: cmd %lx trying to requeue\n", ncr_name(np), (u_long) wcmd);
8037 sts = ncr_queue_command(np, wcmd);
8039 if (sts != DID_OK) {
8040 #ifdef DEBUG_WAITING_LIST
8041 printk("%s: cmd %lx done forced sts=%d\n", ncr_name(np), (u_long) wcmd, sts);
8043 set_host_byte(wcmd, sts);
8044 ncr_queue_done_cmd(np, wcmd);
8051 static ssize_t show_ncr53c8xx_revision(struct device *dev,
8052 struct device_attribute *attr, char *buf)
8054 struct Scsi_Host *host = class_to_shost(dev);
8055 struct host_data *host_data = (struct host_data *)host->hostdata;
8057 return snprintf(buf, 20, "0x%x\n", host_data->ncb->revision_id);
8060 static struct device_attribute ncr53c8xx_revision_attr = {
8061 .attr = { .name = "revision", .mode = S_IRUGO, },
8062 .show = show_ncr53c8xx_revision,
8065 static struct device_attribute *ncr53c8xx_host_attrs[] = {
8066 &ncr53c8xx_revision_attr,
8070 /*==========================================================
8072 ** Boot command line.
8074 **==========================================================
8077 char *ncr53c8xx; /* command line passed by insmod */
8078 module_param(ncr53c8xx, charp, 0);
8082 static int __init ncr53c8xx_setup(char *str)
8084 return sym53c8xx__setup(str);
8087 __setup("ncr53c8xx=", ncr53c8xx_setup);
8092 * Host attach and initialisations.
8094 * Allocate host data and ncb structure.
8095 * Request IO region and remap MMIO region.
8096 * Do chip initialization.
8097 * If all is OK, install interrupt handling and
8098 * start the timer daemon.
8100 struct Scsi_Host * __init ncr_attach(struct scsi_host_template *tpnt,
8101 int unit, struct ncr_device *device)
8103 struct host_data *host_data;
8104 struct ncb *np = NULL;
8105 struct Scsi_Host *instance = NULL;
8110 tpnt->name = SCSI_NCR_DRIVER_NAME;
8111 if (!tpnt->shost_attrs)
8112 tpnt->shost_attrs = ncr53c8xx_host_attrs;
8114 tpnt->queuecommand = ncr53c8xx_queue_command;
8115 tpnt->slave_configure = ncr53c8xx_slave_configure;
8116 tpnt->slave_alloc = ncr53c8xx_slave_alloc;
8117 tpnt->eh_bus_reset_handler = ncr53c8xx_bus_reset;
8118 tpnt->can_queue = SCSI_NCR_CAN_QUEUE;
8120 tpnt->sg_tablesize = SCSI_NCR_SG_TABLESIZE;
8121 tpnt->cmd_per_lun = SCSI_NCR_CMD_PER_LUN;
8123 if (device->differential)
8124 driver_setup.diff_support = device->differential;
8126 printk(KERN_INFO "ncr53c720-%d: rev 0x%x irq %d\n",
8127 unit, device->chip.revision_id, device->slot.irq);
8129 instance = scsi_host_alloc(tpnt, sizeof(*host_data));
8132 host_data = (struct host_data *) instance->hostdata;
8134 np = __m_calloc_dma(device->dev, sizeof(struct ncb), "NCB");
8137 spin_lock_init(&np->smp_lock);
8138 np->dev = device->dev;
8139 np->p_ncb = vtobus(np);
8140 host_data->ncb = np;
8142 np->ccb = m_calloc_dma(sizeof(struct ccb), "CCB");
8146 /* Store input information in the host data structure. */
8148 np->verbose = driver_setup.verbose;
8149 sprintf(np->inst_name, "ncr53c720-%d", np->unit);
8150 np->revision_id = device->chip.revision_id;
8151 np->features = device->chip.features;
8152 np->clock_divn = device->chip.nr_divisor;
8153 np->maxoffs = device->chip.offset_max;
8154 np->maxburst = device->chip.burst_max;
8155 np->myaddr = device->host_id;
8157 /* Allocate SCRIPTS areas. */
8158 np->script0 = m_calloc_dma(sizeof(struct script), "SCRIPT");
8161 np->scripth0 = m_calloc_dma(sizeof(struct scripth), "SCRIPTH");
8165 timer_setup(&np->timer, ncr53c8xx_timeout, 0);
8167 /* Try to map the controller chip to virtual and physical memory. */
8169 np->paddr = device->slot.base;
8170 np->paddr2 = (np->features & FE_RAM) ? device->slot.base_2 : 0;
8172 if (device->slot.base_v)
8173 np->vaddr = device->slot.base_v;
8175 np->vaddr = ioremap(device->slot.base_c, 128);
8179 "%s: can't map memory mapped IO region\n",ncr_name(np));
8182 if (bootverbose > 1)
8184 "%s: using memory mapped IO at virtual address 0x%lx\n", ncr_name(np), (u_long) np->vaddr);
8187 /* Make the controller's registers available. Now the INB INW INL
8188 * OUTB OUTW OUTL macros can be used safely.
8191 np->reg = (struct ncr_reg __iomem *)np->vaddr;
8193 /* Do chip dependent initialization. */
8194 ncr_prepare_setting(np);
8196 if (np->paddr2 && sizeof(struct script) > 4096) {
8198 printk(KERN_WARNING "%s: script too large, NOT using on chip RAM.\n",
8202 instance->max_channel = 0;
8203 instance->this_id = np->myaddr;
8204 instance->max_id = np->maxwide ? 16 : 8;
8205 instance->max_lun = SCSI_NCR_MAX_LUN;
8206 instance->base = (unsigned long) np->reg;
8207 instance->irq = device->slot.irq;
8208 instance->unique_id = device->slot.base;
8209 instance->dma_channel = 0;
8210 instance->cmd_per_lun = MAX_TAGS;
8211 instance->can_queue = (MAX_START-4);
8212 /* This can happen if you forget to call ncr53c8xx_init from
8213 * your module_init */
8214 BUG_ON(!ncr53c8xx_transport_template);
8215 instance->transportt = ncr53c8xx_transport_template;
8217 /* Patch script to physical addresses */
8218 ncr_script_fill(&script0, &scripth0);
8220 np->scripth = np->scripth0;
8221 np->p_scripth = vtobus(np->scripth);
8222 np->p_script = (np->paddr2) ? np->paddr2 : vtobus(np->script0);
8224 ncr_script_copy_and_bind(np, (ncrcmd *) &script0,
8225 (ncrcmd *) np->script0, sizeof(struct script));
8226 ncr_script_copy_and_bind(np, (ncrcmd *) &scripth0,
8227 (ncrcmd *) np->scripth0, sizeof(struct scripth));
8228 np->ccb->p_ccb = vtobus (np->ccb);
8230 /* Patch the script for LED support. */
8232 if (np->features & FE_LED0) {
8233 np->script0->idle[0] =
8234 cpu_to_scr(SCR_REG_REG(gpreg, SCR_OR, 0x01));
8235 np->script0->reselected[0] =
8236 cpu_to_scr(SCR_REG_REG(gpreg, SCR_AND, 0xfe));
8237 np->script0->start[0] =
8238 cpu_to_scr(SCR_REG_REG(gpreg, SCR_AND, 0xfe));
8242 * Look for the target control block of this nexus.
8244 * JUMP ^ IFTRUE (MASK (i, 3)), @(next_lcb)
8246 for (i = 0 ; i < 4 ; i++) {
8247 np->jump_tcb[i].l_cmd =
8248 cpu_to_scr((SCR_JUMP ^ IFTRUE (MASK (i, 3))));
8249 np->jump_tcb[i].l_paddr =
8250 cpu_to_scr(NCB_SCRIPTH_PHYS (np, bad_target));
8253 ncr_chip_reset(np, 100);
8255 /* Now check the cache handling of the chipset. */
8257 if (ncr_snooptest(np)) {
8258 printk(KERN_ERR "CACHE INCORRECTLY CONFIGURED.\n");
8262 /* Install the interrupt handler. */
8263 np->irq = device->slot.irq;
8265 /* Initialize the fixed part of the default ccb. */
8266 ncr_init_ccb(np, np->ccb);
8269 * After SCSI devices have been opened, we cannot reset the bus
8270 * safely, so we do it here. Interrupt handler does the real work.
8271 * Process the reset exception if interrupts are not enabled yet.
8272 * Then enable disconnects.
8274 spin_lock_irqsave(&np->smp_lock, flags);
8275 if (ncr_reset_scsi_bus(np, 0, driver_setup.settle_delay) != 0) {
8276 printk(KERN_ERR "%s: FATAL ERROR: CHECK SCSI BUS - CABLES, TERMINATION, DEVICE POWER etc.!\n", ncr_name(np));
8278 spin_unlock_irqrestore(&np->smp_lock, flags);
8286 * The middle-level SCSI driver does not wait for devices to settle.
8287 * Wait synchronously if more than 2 seconds.
8289 if (driver_setup.settle_delay > 2) {
8290 printk(KERN_INFO "%s: waiting %d seconds for scsi devices to settle...\n",
8291 ncr_name(np), driver_setup.settle_delay);
8292 mdelay(1000 * driver_setup.settle_delay);
8295 /* start the timeout daemon */
8299 /* use SIMPLE TAG messages by default */
8300 #ifdef SCSI_NCR_ALWAYS_SIMPLE_TAG
8301 np->order = SIMPLE_QUEUE_TAG;
8304 spin_unlock_irqrestore(&np->smp_lock, flags);
8311 printk(KERN_INFO "%s: detaching...\n", ncr_name(np));
8315 m_free_dma(np->scripth0, sizeof(struct scripth), "SCRIPTH");
8317 m_free_dma(np->script0, sizeof(struct script), "SCRIPT");
8319 m_free_dma(np->ccb, sizeof(struct ccb), "CCB");
8320 m_free_dma(np, sizeof(struct ncb), "NCB");
8321 host_data->ncb = NULL;
8324 scsi_host_put(instance);
8330 void ncr53c8xx_release(struct Scsi_Host *host)
8332 struct host_data *host_data = shost_priv(host);
8333 #ifdef DEBUG_NCR53C8XX
8334 printk("ncr53c8xx: release\n");
8337 ncr_detach(host_data->ncb);
8338 scsi_host_put(host);
8341 static void ncr53c8xx_set_period(struct scsi_target *starget, int period)
8343 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
8344 struct ncb *np = ((struct host_data *)shost->hostdata)->ncb;
8345 struct tcb *tp = &np->target[starget->id];
8347 if (period > np->maxsync)
8348 period = np->maxsync;
8349 else if (period < np->minsync)
8350 period = np->minsync;
8352 tp->usrsync = period;
8354 ncr_negotiate(np, tp);
8357 static void ncr53c8xx_set_offset(struct scsi_target *starget, int offset)
8359 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
8360 struct ncb *np = ((struct host_data *)shost->hostdata)->ncb;
8361 struct tcb *tp = &np->target[starget->id];
8363 if (offset > np->maxoffs)
8364 offset = np->maxoffs;
8365 else if (offset < 0)
8368 tp->maxoffs = offset;
8370 ncr_negotiate(np, tp);
8373 static void ncr53c8xx_set_width(struct scsi_target *starget, int width)
8375 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
8376 struct ncb *np = ((struct host_data *)shost->hostdata)->ncb;
8377 struct tcb *tp = &np->target[starget->id];
8379 if (width > np->maxwide)
8380 width = np->maxwide;
8384 tp->usrwide = width;
8386 ncr_negotiate(np, tp);
8389 static void ncr53c8xx_get_signalling(struct Scsi_Host *shost)
8391 struct ncb *np = ((struct host_data *)shost->hostdata)->ncb;
8392 enum spi_signal_type type;
8394 switch (np->scsi_mode) {
8396 type = SPI_SIGNAL_SE;
8399 type = SPI_SIGNAL_HVD;
8402 type = SPI_SIGNAL_UNKNOWN;
8405 spi_signalling(shost) = type;
8408 static struct spi_function_template ncr53c8xx_transport_functions = {
8409 .set_period = ncr53c8xx_set_period,
8411 .set_offset = ncr53c8xx_set_offset,
8413 .set_width = ncr53c8xx_set_width,
8415 .get_signalling = ncr53c8xx_get_signalling,
8418 int __init ncr53c8xx_init(void)
8420 ncr53c8xx_transport_template = spi_attach_transport(&ncr53c8xx_transport_functions);
8421 if (!ncr53c8xx_transport_template)
8426 void ncr53c8xx_exit(void)
8428 spi_release_transport(ncr53c8xx_transport_template);