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
1457 #define sync_status phys.sync_st
1458 #define wide_status phys.wide_st
1461 /*==========================================================
1463 ** Declaration of structs: Data structure block
1465 **==========================================================
1467 ** During execution of a ccb by the script processor,
1468 ** the DSA (data structure address) register points
1469 ** to this substructure of the ccb.
1470 ** This substructure contains the header with
1471 ** the script-processor-changeable data and
1472 ** data blocks for the indirect move commands.
1474 **----------------------------------------------------------
1486 ** Table data for Script
1489 struct scr_tblsel select;
1490 struct scr_tblmove smsg ;
1491 struct scr_tblmove cmd ;
1492 struct scr_tblmove sense ;
1493 struct scr_tblmove data[MAX_SCATTER];
1497 /*========================================================================
1499 ** Declaration of structs: Command control block.
1501 **========================================================================
1504 /*----------------------------------------------------------------
1505 ** This is the data structure which is pointed by the DSA
1506 ** register when it is executed by the script processor.
1507 ** It must be the first entry because it contains the header
1508 ** as first entry that must be cache line aligned.
1509 **----------------------------------------------------------------
1513 /*----------------------------------------------------------------
1514 ** Mini-script used at CCB execution start-up.
1515 ** Load the DSA with the data structure address (phys) and
1516 ** jump to SELECT. Jump to CANCEL if CCB is to be canceled.
1517 **----------------------------------------------------------------
1519 struct launch start;
1521 /*----------------------------------------------------------------
1522 ** Mini-script used at CCB relection to restart the nexus.
1523 ** Load the DSA with the data structure address (phys) and
1524 ** jump to RESEL_DSA. Jump to ABORT if CCB is to be aborted.
1525 **----------------------------------------------------------------
1527 struct launch restart;
1529 /*----------------------------------------------------------------
1530 ** If a data transfer phase is terminated too early
1531 ** (after reception of a message (i.e. DISCONNECT)),
1532 ** we have to prepare a mini script to transfer
1533 ** the rest of the data.
1534 **----------------------------------------------------------------
1538 /*----------------------------------------------------------------
1539 ** The general SCSI driver provides a
1540 ** pointer to a control block.
1541 **----------------------------------------------------------------
1543 struct scsi_cmnd *cmd; /* SCSI command */
1544 u_char cdb_buf[16]; /* Copy of CDB */
1545 u_char sense_buf[64];
1546 int data_len; /* Total data length */
1548 /*----------------------------------------------------------------
1550 ** We prepare a message to be sent after selection.
1551 ** We may use a second one if the command is rescheduled
1552 ** due to GETCC or QFULL.
1553 ** Contents are IDENTIFY and SIMPLE_TAG.
1554 ** While negotiating sync or wide transfer,
1555 ** a SDTR or WDTR message is appended.
1556 **----------------------------------------------------------------
1558 u_char scsi_smsg [8];
1559 u_char scsi_smsg2[8];
1561 /*----------------------------------------------------------------
1563 **----------------------------------------------------------------
1565 u_long p_ccb; /* BUS address of this CCB */
1566 u_char sensecmd[6]; /* Sense command */
1567 u_char tag; /* Tag for this transfer */
1568 /* 255 means no tag */
1573 struct ccb * link_ccb; /* Host adapter CCB chain */
1574 struct list_head link_ccbq; /* Link to unit CCB queue */
1575 u32 startp; /* Initial data pointer */
1576 u_long magic; /* Free / busy CCB flag */
1579 #define CCB_PHYS(cp,lbl) (cp->p_ccb + offsetof(struct ccb, lbl))
1582 /*========================================================================
1584 ** Declaration of structs: NCR device descriptor
1586 **========================================================================
1589 /*----------------------------------------------------------------
1590 ** The global header.
1591 ** It is accessible to both the host and the script processor.
1592 ** Must be cache line size aligned (32 for x86) in order to
1593 ** allow cache line bursting when it is copied to/from CCB.
1594 **----------------------------------------------------------------
1598 /*----------------------------------------------------------------
1599 ** CCBs management queues.
1600 **----------------------------------------------------------------
1602 struct scsi_cmnd *waiting_list; /* Commands waiting for a CCB */
1603 /* when lcb is not allocated. */
1604 struct scsi_cmnd *done_list; /* Commands waiting for done() */
1605 /* callback to be invoked. */
1606 spinlock_t smp_lock; /* Lock for SMP threading */
1608 /*----------------------------------------------------------------
1609 ** Chip and controller identification.
1610 **----------------------------------------------------------------
1612 int unit; /* Unit number */
1613 char inst_name[16]; /* ncb instance name */
1615 /*----------------------------------------------------------------
1616 ** Initial value of some IO register bits.
1617 ** These values are assumed to have been set by BIOS, and may
1618 ** be used for probing adapter implementation differences.
1619 **----------------------------------------------------------------
1621 u_char sv_scntl0, sv_scntl3, sv_dmode, sv_dcntl, sv_ctest0, sv_ctest3,
1622 sv_ctest4, sv_ctest5, sv_gpcntl, sv_stest2, sv_stest4;
1624 /*----------------------------------------------------------------
1625 ** Actual initial value of IO register bits used by the
1626 ** driver. They are loaded at initialisation according to
1627 ** features that are to be enabled.
1628 **----------------------------------------------------------------
1630 u_char rv_scntl0, rv_scntl3, rv_dmode, rv_dcntl, rv_ctest0, rv_ctest3,
1631 rv_ctest4, rv_ctest5, rv_stest2;
1633 /*----------------------------------------------------------------
1634 ** Targets management.
1635 ** During reselection the ncr jumps to jump_tcb.
1636 ** The SFBR register is loaded with the encoded target id.
1638 ** SCR_JUMP ^ IFTRUE(MASK(i, 3)), @(next tcb mod. i)
1640 ** Recent chips will prefetch the 4 JUMPS using only 1 burst.
1641 ** It is kind of hashcoding.
1642 **----------------------------------------------------------------
1644 struct link jump_tcb[4]; /* JUMPs for reselection */
1645 struct tcb target[MAX_TARGET]; /* Target data */
1647 /*----------------------------------------------------------------
1648 ** Virtual and physical bus addresses of the chip.
1649 **----------------------------------------------------------------
1651 void __iomem *vaddr; /* Virtual and bus address of */
1652 unsigned long paddr; /* chip's IO registers. */
1653 unsigned long paddr2; /* On-chip RAM bus address. */
1654 volatile /* Pointer to volatile for */
1655 struct ncr_reg __iomem *reg; /* memory mapped IO. */
1657 /*----------------------------------------------------------------
1658 ** SCRIPTS virtual and physical bus addresses.
1659 ** 'script' is loaded in the on-chip RAM if present.
1660 ** 'scripth' stays in main memory.
1661 **----------------------------------------------------------------
1663 struct script *script0; /* Copies of script and scripth */
1664 struct scripth *scripth0; /* relocated for this ncb. */
1665 struct scripth *scripth; /* Actual scripth virt. address */
1666 u_long p_script; /* Actual script and scripth */
1667 u_long p_scripth; /* bus addresses. */
1669 /*----------------------------------------------------------------
1670 ** General controller parameters and configuration.
1671 **----------------------------------------------------------------
1674 u_char revision_id; /* PCI device revision id */
1675 u32 irq; /* IRQ level */
1676 u32 features; /* Chip features map */
1677 u_char myaddr; /* SCSI id of the adapter */
1678 u_char maxburst; /* log base 2 of dwords burst */
1679 u_char maxwide; /* Maximum transfer width */
1680 u_char minsync; /* Minimum sync period factor */
1681 u_char maxsync; /* Maximum sync period factor */
1682 u_char maxoffs; /* Max scsi offset */
1683 u_char multiplier; /* Clock multiplier (1,2,4) */
1684 u_char clock_divn; /* Number of clock divisors */
1685 u_long clock_khz; /* SCSI clock frequency in KHz */
1687 /*----------------------------------------------------------------
1688 ** Start queue management.
1689 ** It is filled up by the host processor and accessed by the
1690 ** SCRIPTS processor in order to start SCSI commands.
1691 **----------------------------------------------------------------
1693 u16 squeueput; /* Next free slot of the queue */
1694 u16 actccbs; /* Number of allocated CCBs */
1695 u16 queuedccbs; /* Number of CCBs in start queue*/
1696 u16 queuedepth; /* Start queue depth */
1698 /*----------------------------------------------------------------
1700 **----------------------------------------------------------------
1702 struct timer_list timer; /* Timer handler link header */
1704 u_long settle_time; /* Resetting the SCSI BUS */
1706 /*----------------------------------------------------------------
1707 ** Debugging and profiling.
1708 **----------------------------------------------------------------
1710 struct ncr_reg regdump; /* Register dump */
1711 u_long regtime; /* Time it has been done */
1713 /*----------------------------------------------------------------
1714 ** Miscellaneous buffers accessed by the scripts-processor.
1715 ** They shall be DWORD aligned, because they may be read or
1716 ** written with a SCR_COPY script command.
1717 **----------------------------------------------------------------
1719 u_char msgout[8]; /* Buffer for MESSAGE OUT */
1720 u_char msgin [8]; /* Buffer for MESSAGE IN */
1721 u32 lastmsg; /* Last SCSI message sent */
1722 u_char scratch; /* Scratch for SCSI receive */
1724 /*----------------------------------------------------------------
1725 ** Miscellaneous configuration and status parameters.
1726 **----------------------------------------------------------------
1728 u_char disc; /* Disconnection allowed */
1729 u_char scsi_mode; /* Current SCSI BUS mode */
1730 u_char order; /* Tag order to use */
1731 u_char verbose; /* Verbosity for this controller*/
1732 int ncr_cache; /* Used for cache test at init. */
1733 u_long p_ncb; /* BUS address of this NCB */
1735 /*----------------------------------------------------------------
1736 ** Command completion handling.
1737 **----------------------------------------------------------------
1739 #ifdef SCSI_NCR_CCB_DONE_SUPPORT
1740 struct ccb *(ccb_done[MAX_DONE]);
1743 /*----------------------------------------------------------------
1744 ** Fields that should be removed or changed.
1745 **----------------------------------------------------------------
1747 struct ccb *ccb; /* Global CCB */
1748 struct usrcmd user; /* Command from user */
1749 volatile u_char release_stage; /* Synchronisation stage on release */
1752 #define NCB_SCRIPT_PHYS(np,lbl) (np->p_script + offsetof (struct script, lbl))
1753 #define NCB_SCRIPTH_PHYS(np,lbl) (np->p_scripth + offsetof (struct scripth,lbl))
1755 /*==========================================================
1758 ** Script for NCR-Processor.
1760 ** Use ncr_script_fill() to create the variable parts.
1761 ** Use ncr_script_copy_and_bind() to make a copy and
1762 ** bind to physical addresses.
1765 **==========================================================
1767 ** We have to know the offsets of all labels before
1768 ** we reach them (for forward jumps).
1769 ** Therefore we declare a struct here.
1770 ** If you make changes inside the script,
1771 ** DONT FORGET TO CHANGE THE LENGTHS HERE!
1773 **----------------------------------------------------------
1777 ** For HP Zalon/53c720 systems, the Zalon interface
1778 ** between CPU and 53c720 does prefetches, which causes
1779 ** problems with self modifying scripts. The problem
1780 ** is overcome by calling a dummy subroutine after each
1781 ** modification, to force a refetch of the script on
1782 ** return from the subroutine.
1785 #ifdef CONFIG_NCR53C8XX_PREFETCH
1786 #define PREFETCH_FLUSH_CNT 2
1787 #define PREFETCH_FLUSH SCR_CALL, PADDRH (wait_dma),
1789 #define PREFETCH_FLUSH_CNT 0
1790 #define PREFETCH_FLUSH
1794 ** Script fragments which are loaded into the on-chip RAM
1795 ** of 825A, 875 and 895 chips.
1799 ncrcmd startpos [ 1];
1801 ncrcmd select2 [ 9 + PREFETCH_FLUSH_CNT];
1802 ncrcmd loadpos [ 4];
1803 ncrcmd send_ident [ 9];
1804 ncrcmd prepare [ 6];
1805 ncrcmd prepare2 [ 7];
1806 ncrcmd command [ 6];
1807 ncrcmd dispatch [ 32];
1809 ncrcmd no_data [ 17];
1812 ncrcmd msg_in2 [ 16];
1813 ncrcmd msg_bad [ 4];
1815 ncrcmd cleanup [ 6];
1816 ncrcmd complete [ 9];
1817 ncrcmd cleanup_ok [ 8 + PREFETCH_FLUSH_CNT];
1818 ncrcmd cleanup0 [ 1];
1819 #ifndef SCSI_NCR_CCB_DONE_SUPPORT
1820 ncrcmd signal [ 12];
1823 ncrcmd done_pos [ 1];
1824 ncrcmd done_plug [ 2];
1825 ncrcmd done_end [ 7];
1827 ncrcmd save_dp [ 7];
1828 ncrcmd restore_dp [ 5];
1829 ncrcmd disconnect [ 10];
1830 ncrcmd msg_out [ 9];
1831 ncrcmd msg_out_done [ 7];
1833 ncrcmd reselect [ 8];
1834 ncrcmd reselected [ 8];
1835 ncrcmd resel_dsa [ 6 + PREFETCH_FLUSH_CNT];
1836 ncrcmd loadpos1 [ 4];
1837 ncrcmd resel_lun [ 6];
1838 ncrcmd resel_tag [ 6];
1839 ncrcmd jump_to_nexus [ 4 + PREFETCH_FLUSH_CNT];
1840 ncrcmd nexus_indirect [ 4];
1841 ncrcmd resel_notag [ 4];
1842 ncrcmd data_in [MAX_SCATTERL * 4];
1843 ncrcmd data_in2 [ 4];
1844 ncrcmd data_out [MAX_SCATTERL * 4];
1845 ncrcmd data_out2 [ 4];
1849 ** Script fragments which stay in main memory for all chips.
1852 ncrcmd tryloop [MAX_START*2];
1853 ncrcmd tryloop2 [ 2];
1854 #ifdef SCSI_NCR_CCB_DONE_SUPPORT
1855 ncrcmd done_queue [MAX_DONE*5];
1856 ncrcmd done_queue2 [ 2];
1858 ncrcmd select_no_atn [ 8];
1860 ncrcmd skip [ 9 + PREFETCH_FLUSH_CNT];
1862 ncrcmd par_err_data_in [ 6];
1863 ncrcmd par_err_other [ 4];
1864 ncrcmd msg_reject [ 8];
1865 ncrcmd msg_ign_residue [ 24];
1866 ncrcmd msg_extended [ 10];
1867 ncrcmd msg_ext_2 [ 10];
1868 ncrcmd msg_wdtr [ 14];
1869 ncrcmd send_wdtr [ 7];
1870 ncrcmd msg_ext_3 [ 10];
1871 ncrcmd msg_sdtr [ 14];
1872 ncrcmd send_sdtr [ 7];
1873 ncrcmd nego_bad_phase [ 4];
1874 ncrcmd msg_out_abort [ 10];
1875 ncrcmd hdata_in [MAX_SCATTERH * 4];
1876 ncrcmd hdata_in2 [ 2];
1877 ncrcmd hdata_out [MAX_SCATTERH * 4];
1878 ncrcmd hdata_out2 [ 2];
1880 ncrcmd aborttag [ 4];
1882 ncrcmd abort_resel [ 20];
1883 ncrcmd resend_ident [ 4];
1884 ncrcmd clratn_go_on [ 3];
1885 ncrcmd nxtdsp_go_on [ 1];
1886 ncrcmd sdata_in [ 8];
1887 ncrcmd data_io [ 18];
1888 ncrcmd bad_identify [ 12];
1889 ncrcmd bad_i_t_l [ 4];
1890 ncrcmd bad_i_t_l_q [ 4];
1891 ncrcmd bad_target [ 8];
1892 ncrcmd bad_status [ 8];
1893 ncrcmd start_ram [ 4 + PREFETCH_FLUSH_CNT];
1894 ncrcmd start_ram0 [ 4];
1895 ncrcmd sto_restart [ 5];
1896 ncrcmd wait_dma [ 2];
1897 ncrcmd snooptest [ 9];
1898 ncrcmd snoopend [ 2];
1901 /*==========================================================
1904 ** Function headers.
1907 **==========================================================
1910 static void ncr_alloc_ccb (struct ncb *np, u_char tn, u_char ln);
1911 static void ncr_complete (struct ncb *np, struct ccb *cp);
1912 static void ncr_exception (struct ncb *np);
1913 static void ncr_free_ccb (struct ncb *np, struct ccb *cp);
1914 static void ncr_init_ccb (struct ncb *np, struct ccb *cp);
1915 static void ncr_init_tcb (struct ncb *np, u_char tn);
1916 static struct lcb * ncr_alloc_lcb (struct ncb *np, u_char tn, u_char ln);
1917 static struct lcb * ncr_setup_lcb (struct ncb *np, struct scsi_device *sdev);
1918 static void ncr_getclock (struct ncb *np, int mult);
1919 static void ncr_selectclock (struct ncb *np, u_char scntl3);
1920 static struct ccb *ncr_get_ccb (struct ncb *np, struct scsi_cmnd *cmd);
1921 static void ncr_chip_reset (struct ncb *np, int delay);
1922 static void ncr_init (struct ncb *np, int reset, char * msg, u_long code);
1923 static int ncr_int_sbmc (struct ncb *np);
1924 static int ncr_int_par (struct ncb *np);
1925 static void ncr_int_ma (struct ncb *np);
1926 static void ncr_int_sir (struct ncb *np);
1927 static void ncr_int_sto (struct ncb *np);
1928 static void ncr_negotiate (struct ncb* np, struct tcb* tp);
1929 static int ncr_prepare_nego(struct ncb *np, struct ccb *cp, u_char *msgptr);
1931 static void ncr_script_copy_and_bind
1932 (struct ncb *np, ncrcmd *src, ncrcmd *dst, int len);
1933 static void ncr_script_fill (struct script * scr, struct scripth * scripth);
1934 static int ncr_scatter (struct ncb *np, struct ccb *cp, struct scsi_cmnd *cmd);
1935 static void ncr_getsync (struct ncb *np, u_char sfac, u_char *fakp, u_char *scntl3p);
1936 static void ncr_setsync (struct ncb *np, struct ccb *cp, u_char scntl3, u_char sxfer);
1937 static void ncr_setup_tags (struct ncb *np, struct scsi_device *sdev);
1938 static void ncr_setwide (struct ncb *np, struct ccb *cp, u_char wide, u_char ack);
1939 static int ncr_snooptest (struct ncb *np);
1940 static void ncr_timeout (struct ncb *np);
1941 static void ncr_wakeup (struct ncb *np, u_long code);
1942 static void ncr_wakeup_done (struct ncb *np);
1943 static void ncr_start_next_ccb (struct ncb *np, struct lcb * lp, int maxn);
1944 static void ncr_put_start_queue(struct ncb *np, struct ccb *cp);
1946 static void insert_into_waiting_list(struct ncb *np, struct scsi_cmnd *cmd);
1947 static struct scsi_cmnd *retrieve_from_waiting_list(int to_remove, struct ncb *np, struct scsi_cmnd *cmd);
1948 static void process_waiting_list(struct ncb *np, int sts);
1950 #define remove_from_waiting_list(np, cmd) \
1951 retrieve_from_waiting_list(1, (np), (cmd))
1952 #define requeue_waiting_list(np) process_waiting_list((np), DID_OK)
1953 #define reset_waiting_list(np) process_waiting_list((np), DID_RESET)
1955 static inline char *ncr_name (struct ncb *np)
1957 return np->inst_name;
1961 /*==========================================================
1964 ** Scripts for NCR-Processor.
1966 ** Use ncr_script_bind for binding to physical addresses.
1969 **==========================================================
1971 ** NADDR generates a reference to a field of the controller data.
1972 ** PADDR generates a reference to another part of the script.
1973 ** RADDR generates a reference to a script processor register.
1974 ** FADDR generates a reference to a script processor register
1977 **----------------------------------------------------------
1980 #define RELOC_SOFTC 0x40000000
1981 #define RELOC_LABEL 0x50000000
1982 #define RELOC_REGISTER 0x60000000
1984 #define RELOC_KVAR 0x70000000
1986 #define RELOC_LABELH 0x80000000
1987 #define RELOC_MASK 0xf0000000
1989 #define NADDR(label) (RELOC_SOFTC | offsetof(struct ncb, label))
1990 #define PADDR(label) (RELOC_LABEL | offsetof(struct script, label))
1991 #define PADDRH(label) (RELOC_LABELH | offsetof(struct scripth, label))
1992 #define RADDR(label) (RELOC_REGISTER | REG(label))
1993 #define FADDR(label,ofs)(RELOC_REGISTER | ((REG(label))+(ofs)))
1995 #define KVAR(which) (RELOC_KVAR | (which))
1999 #define SCRIPT_KVAR_JIFFIES (0)
2000 #define SCRIPT_KVAR_FIRST SCRIPT_KVAR_JIFFIES
2001 #define SCRIPT_KVAR_LAST SCRIPT_KVAR_JIFFIES
2003 * Kernel variables referenced in the scripts.
2004 * THESE MUST ALL BE ALIGNED TO A 4-BYTE BOUNDARY.
2006 static void *script_kvars[] __initdata =
2007 { (void *)&jiffies };
2010 static struct script script0 __initdata = {
2011 /*--------------------------< START >-----------------------*/ {
2013 ** This NOP will be patched with LED ON
2014 ** SCR_REG_REG (gpreg, SCR_AND, 0xfe)
2021 SCR_FROM_REG (ctest2),
2024 ** Then jump to a certain point in tryloop.
2025 ** Due to the lack of indirect addressing the code
2026 ** is self modifying here.
2029 }/*-------------------------< STARTPOS >--------------------*/,{
2032 }/*-------------------------< SELECT >----------------------*/,{
2034 ** DSA contains the address of a scheduled
2037 ** SCRATCHA contains the address of the script,
2038 ** which starts the next entry.
2040 ** Set Initiator mode.
2042 ** (Target mode is left as an exercise for the reader)
2047 SCR_LOAD_REG (HS_REG, HS_SELECTING),
2051 ** And try to select this target.
2053 SCR_SEL_TBL_ATN ^ offsetof (struct dsb, select),
2056 }/*-------------------------< SELECT2 >----------------------*/,{
2058 ** Now there are 4 possibilities:
2060 ** (1) The ncr loses arbitration.
2061 ** This is ok, because it will try again,
2062 ** when the bus becomes idle.
2063 ** (But beware of the timeout function!)
2065 ** (2) The ncr is reselected.
2066 ** Then the script processor takes the jump
2067 ** to the RESELECT label.
2069 ** (3) The ncr wins arbitration.
2070 ** Then it will execute SCRIPTS instruction until
2071 ** the next instruction that checks SCSI phase.
2072 ** Then will stop and wait for selection to be
2073 ** complete or selection time-out to occur.
2074 ** As a result the SCRIPTS instructions until
2075 ** LOADPOS + 2 should be executed in parallel with
2076 ** the SCSI core performing selection.
2080 ** The MESSAGE_REJECT problem seems to be due to a selection
2082 ** Wait immediately for the selection to complete.
2083 ** (2.5x behaves so)
2085 SCR_JUMPR ^ IFFALSE (WHEN (SCR_MSG_OUT)),
2089 ** Next time use the next slot.
2095 ** The ncr doesn't have an indirect load
2096 ** or store command. So we have to
2097 ** copy part of the control block to a
2098 ** fixed place, where we can access it.
2100 ** We patch the address part of a
2101 ** COPY command with the DSA-register.
2107 ** Flush script prefetch if required
2111 ** then we do the actual copy.
2113 SCR_COPY (sizeof (struct head)),
2115 ** continued after the next label ...
2117 }/*-------------------------< LOADPOS >---------------------*/,{
2121 ** Wait for the next phase or the selection
2122 ** to complete or time-out.
2124 SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_OUT)),
2127 }/*-------------------------< SEND_IDENT >----------------------*/,{
2129 ** Selection complete.
2130 ** Send the IDENTIFY and SIMPLE_TAG messages
2131 ** (and the EXTENDED_SDTR message)
2133 SCR_MOVE_TBL ^ SCR_MSG_OUT,
2134 offsetof (struct dsb, smsg),
2135 SCR_JUMP ^ IFTRUE (WHEN (SCR_MSG_OUT)),
2136 PADDRH (resend_ident),
2137 SCR_LOAD_REG (scratcha, 0x80),
2142 }/*-------------------------< PREPARE >----------------------*/,{
2144 ** load the savep (saved pointer) into
2145 ** the TEMP register (actual pointer)
2148 NADDR (header.savep),
2151 ** Initialize the status registers
2154 NADDR (header.status),
2156 }/*-------------------------< PREPARE2 >---------------------*/,{
2158 ** Initialize the msgout buffer with a NOOP message.
2160 SCR_LOAD_REG (scratcha, NOP),
2171 ** Anticipate the COMMAND phase.
2172 ** This is the normal case for initial selection.
2174 SCR_JUMP ^ IFFALSE (WHEN (SCR_COMMAND)),
2177 }/*-------------------------< COMMAND >--------------------*/,{
2179 ** ... and send the command
2181 SCR_MOVE_TBL ^ SCR_COMMAND,
2182 offsetof (struct dsb, cmd),
2184 ** If status is still HS_NEGOTIATE, negotiation failed.
2185 ** We check this here, since we want to do that
2188 SCR_FROM_REG (HS_REG),
2190 SCR_INT ^ IFTRUE (DATA (HS_NEGOTIATE)),
2193 }/*-----------------------< DISPATCH >----------------------*/,{
2195 ** MSG_IN is the only phase that shall be
2196 ** entered at least once for each (re)selection.
2197 ** So we test it first.
2199 SCR_JUMP ^ IFTRUE (WHEN (SCR_MSG_IN)),
2202 SCR_RETURN ^ IFTRUE (IF (SCR_DATA_OUT)),
2205 ** DEL 397 - 53C875 Rev 3 - Part Number 609-0392410 - ITEM 4.
2206 ** Possible data corruption during Memory Write and Invalidate.
2207 ** This work-around resets the addressing logic prior to the
2208 ** start of the first MOVE of a DATA IN phase.
2209 ** (See Documentation/scsi/ncr53c8xx.rst for more information)
2211 SCR_JUMPR ^ IFFALSE (IF (SCR_DATA_IN)),
2218 SCR_JUMP ^ IFTRUE (IF (SCR_STATUS)),
2220 SCR_JUMP ^ IFTRUE (IF (SCR_COMMAND)),
2222 SCR_JUMP ^ IFTRUE (IF (SCR_MSG_OUT)),
2225 ** Discard one illegal phase byte, if required.
2227 SCR_LOAD_REG (scratcha, XE_BAD_PHASE),
2232 SCR_JUMPR ^ IFFALSE (IF (SCR_ILG_OUT)),
2234 SCR_MOVE_ABS (1) ^ SCR_ILG_OUT,
2236 SCR_JUMPR ^ IFFALSE (IF (SCR_ILG_IN)),
2238 SCR_MOVE_ABS (1) ^ SCR_ILG_IN,
2243 }/*-------------------------< CLRACK >----------------------*/,{
2245 ** Terminate possible pending message phase.
2252 }/*-------------------------< NO_DATA >--------------------*/,{
2254 ** The target wants to tranfer too much data
2255 ** or in the wrong direction.
2256 ** Remember that in extended error.
2258 SCR_LOAD_REG (scratcha, XE_EXTRA_DATA),
2264 ** Discard one data byte, if required.
2266 SCR_JUMPR ^ IFFALSE (WHEN (SCR_DATA_OUT)),
2268 SCR_MOVE_ABS (1) ^ SCR_DATA_OUT,
2270 SCR_JUMPR ^ IFFALSE (IF (SCR_DATA_IN)),
2272 SCR_MOVE_ABS (1) ^ SCR_DATA_IN,
2275 ** .. and repeat as required.
2282 }/*-------------------------< STATUS >--------------------*/,{
2286 SCR_MOVE_ABS (1) ^ SCR_STATUS,
2289 ** save status to scsi_status.
2290 ** mark as complete.
2292 SCR_TO_REG (SS_REG),
2294 SCR_LOAD_REG (HS_REG, HS_COMPLETE),
2298 }/*-------------------------< MSG_IN >--------------------*/,{
2300 ** Get the first byte of the message
2301 ** and save it to SCRATCHA.
2303 ** The script processor doesn't negate the
2304 ** ACK signal after this transfer.
2306 SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
2308 }/*-------------------------< MSG_IN2 >--------------------*/,{
2310 ** Handle this message.
2312 SCR_JUMP ^ IFTRUE (DATA (COMMAND_COMPLETE)),
2314 SCR_JUMP ^ IFTRUE (DATA (DISCONNECT)),
2316 SCR_JUMP ^ IFTRUE (DATA (SAVE_POINTERS)),
2318 SCR_JUMP ^ IFTRUE (DATA (RESTORE_POINTERS)),
2320 SCR_JUMP ^ IFTRUE (DATA (EXTENDED_MESSAGE)),
2321 PADDRH (msg_extended),
2322 SCR_JUMP ^ IFTRUE (DATA (NOP)),
2324 SCR_JUMP ^ IFTRUE (DATA (MESSAGE_REJECT)),
2325 PADDRH (msg_reject),
2326 SCR_JUMP ^ IFTRUE (DATA (IGNORE_WIDE_RESIDUE)),
2327 PADDRH (msg_ign_residue),
2329 ** Rest of the messages left as
2332 ** Unimplemented messages:
2333 ** fall through to MSG_BAD.
2335 }/*-------------------------< MSG_BAD >------------------*/,{
2337 ** unimplemented message - reject it.
2341 SCR_LOAD_REG (scratcha, MESSAGE_REJECT),
2343 }/*-------------------------< SETMSG >----------------------*/,{
2351 }/*-------------------------< CLEANUP >-------------------*/,{
2353 ** dsa: Pointer to ccb
2354 ** or xxxxxxFF (no ccb)
2356 ** HS_REG: Host-Status (<>0!)
2360 SCR_JUMP ^ IFTRUE (DATA (0xff)),
2364 ** complete the cleanup.
2369 }/*-------------------------< COMPLETE >-----------------*/,{
2371 ** Complete message.
2373 ** Copy TEMP register to LASTP in header.
2377 NADDR (header.lastp),
2379 ** When we terminate the cycle by clearing ACK,
2380 ** the target may disconnect immediately.
2382 ** We don't want to be told of an
2383 ** "unexpected disconnect",
2384 ** so we disable this feature.
2386 SCR_REG_REG (scntl2, SCR_AND, 0x7f),
2389 ** Terminate cycle ...
2391 SCR_CLR (SCR_ACK|SCR_ATN),
2394 ** ... and wait for the disconnect.
2398 }/*-------------------------< CLEANUP_OK >----------------*/,{
2400 ** Save host status to header.
2404 NADDR (header.status),
2406 ** and copy back the header to the ccb.
2412 ** Flush script prefetch if required
2415 SCR_COPY (sizeof (struct head)),
2417 }/*-------------------------< CLEANUP0 >--------------------*/,{
2419 }/*-------------------------< SIGNAL >----------------------*/,{
2421 ** if job not completed ...
2423 SCR_FROM_REG (HS_REG),
2426 ** ... start the next command.
2428 SCR_JUMP ^ IFTRUE (MASK (0, (HS_DONEMASK|HS_SKIPMASK))),
2431 ** If command resulted in not GOOD status,
2432 ** call the C code if needed.
2434 SCR_FROM_REG (SS_REG),
2436 SCR_CALL ^ IFFALSE (DATA (SAM_STAT_GOOD)),
2437 PADDRH (bad_status),
2439 #ifndef SCSI_NCR_CCB_DONE_SUPPORT
2442 ** ... signal completion to the host
2447 ** Auf zu neuen Schandtaten!
2452 #else /* defined SCSI_NCR_CCB_DONE_SUPPORT */
2455 ** ... signal completion to the host
2458 }/*------------------------< DONE_POS >---------------------*/,{
2459 PADDRH (done_queue),
2460 }/*------------------------< DONE_PLUG >--------------------*/,{
2463 }/*------------------------< DONE_END >---------------------*/,{
2472 #endif /* SCSI_NCR_CCB_DONE_SUPPORT */
2474 }/*-------------------------< SAVE_DP >------------------*/,{
2477 ** Copy TEMP register to SAVEP in header.
2481 NADDR (header.savep),
2486 }/*-------------------------< RESTORE_DP >---------------*/,{
2488 ** RESTORE_DP message:
2489 ** Copy SAVEP in header to TEMP register.
2492 NADDR (header.savep),
2497 }/*-------------------------< DISCONNECT >---------------*/,{
2499 ** DISCONNECTing ...
2501 ** disable the "unexpected disconnect" feature,
2502 ** and remove the ACK signal.
2504 SCR_REG_REG (scntl2, SCR_AND, 0x7f),
2506 SCR_CLR (SCR_ACK|SCR_ATN),
2509 ** Wait for the disconnect.
2514 ** Status is: DISCONNECTED.
2516 SCR_LOAD_REG (HS_REG, HS_DISCONNECT),
2521 }/*-------------------------< MSG_OUT >-------------------*/,{
2523 ** The target requests a message.
2525 SCR_MOVE_ABS (1) ^ SCR_MSG_OUT,
2531 ** If it was no ABORT message ...
2533 SCR_JUMP ^ IFTRUE (DATA (ABORT_TASK_SET)),
2534 PADDRH (msg_out_abort),
2536 ** ... wait for the next phase
2537 ** if it's a message out, send it again, ...
2539 SCR_JUMP ^ IFTRUE (WHEN (SCR_MSG_OUT)),
2541 }/*-------------------------< MSG_OUT_DONE >--------------*/,{
2543 ** ... else clear the message ...
2545 SCR_LOAD_REG (scratcha, NOP),
2551 ** ... and process the next phase
2555 }/*-------------------------< IDLE >------------------------*/,{
2558 ** Wait for reselect.
2559 ** This NOP will be patched with LED OFF
2560 ** SCR_REG_REG (gpreg, SCR_OR, 0x01)
2564 }/*-------------------------< RESELECT >--------------------*/,{
2566 ** make the DSA invalid.
2568 SCR_LOAD_REG (dsa, 0xff),
2572 SCR_LOAD_REG (HS_REG, HS_IN_RESELECT),
2575 ** Sleep waiting for a reselection.
2576 ** If SIGP is set, special treatment.
2578 ** Zu allem bereit ..
2582 }/*-------------------------< RESELECTED >------------------*/,{
2584 ** This NOP will be patched with LED ON
2585 ** SCR_REG_REG (gpreg, SCR_AND, 0xfe)
2590 ** ... zu nichts zu gebrauchen ?
2592 ** load the target id into the SFBR
2593 ** and jump to the control block.
2595 ** Look at the declarations of
2600 ** to understand what's going on.
2602 SCR_REG_SFBR (ssid, SCR_AND, 0x8F),
2609 }/*-------------------------< RESEL_DSA >-------------------*/,{
2611 ** Ack the IDENTIFY or TAG previously received.
2616 ** The ncr doesn't have an indirect load
2617 ** or store command. So we have to
2618 ** copy part of the control block to a
2619 ** fixed place, where we can access it.
2621 ** We patch the address part of a
2622 ** COPY command with the DSA-register.
2628 ** Flush script prefetch if required
2632 ** then we do the actual copy.
2634 SCR_COPY (sizeof (struct head)),
2636 ** continued after the next label ...
2639 }/*-------------------------< LOADPOS1 >-------------------*/,{
2643 ** The DSA contains the data structure address.
2648 }/*-------------------------< RESEL_LUN >-------------------*/,{
2650 ** come back to this point
2651 ** to get an IDENTIFY message
2652 ** Wait for a msg_in phase.
2654 SCR_INT ^ IFFALSE (WHEN (SCR_MSG_IN)),
2655 SIR_RESEL_NO_MSG_IN,
2658 ** Read the data directly from the BUS DATA lines.
2659 ** This helps to support very old SCSI devices that
2660 ** may reselect without sending an IDENTIFY.
2662 SCR_FROM_REG (sbdl),
2665 ** It should be an Identify message.
2669 }/*-------------------------< RESEL_TAG >-------------------*/,{
2671 ** Read IDENTIFY + SIMPLE + TAG using a single MOVE.
2672 ** Aggressive optimization, is'nt it?
2673 ** No need to test the SIMPLE TAG message, since the
2674 ** driver only supports conformant devices for tags. ;-)
2676 SCR_MOVE_ABS (3) ^ SCR_MSG_IN,
2679 ** Read the TAG from the SIDL.
2680 ** Still an aggressive optimization. ;-)
2681 ** Compute the CCB indirect jump address which
2682 ** is (#TAG*2 & 0xfc) due to tag numbering using
2683 ** 1,3,5..MAXTAGS*2+1 actual values.
2685 SCR_REG_SFBR (sidl, SCR_SHL, 0),
2687 SCR_SFBR_REG (temp, SCR_AND, 0xfc),
2689 }/*-------------------------< JUMP_TO_NEXUS >-------------------*/,{
2692 PADDR (nexus_indirect),
2694 ** Flush script prefetch if required
2698 }/*-------------------------< NEXUS_INDIRECT >-------------------*/,{
2703 }/*-------------------------< RESEL_NOTAG >-------------------*/,{
2706 ** Read an throw away the IDENTIFY.
2708 SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
2711 PADDR (jump_to_nexus),
2712 }/*-------------------------< DATA_IN >--------------------*/,{
2714 ** Because the size depends on the
2715 ** #define MAX_SCATTERL parameter,
2716 ** it is filled in at runtime.
2718 ** ##===========< i=0; i<MAX_SCATTERL >=========
2719 ** || SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_IN)),
2720 ** || PADDR (dispatch),
2721 ** || SCR_MOVE_TBL ^ SCR_DATA_IN,
2722 ** || offsetof (struct dsb, data[ i]),
2723 ** ##==========================================
2725 **---------------------------------------------------------
2728 }/*-------------------------< DATA_IN2 >-------------------*/,{
2733 }/*-------------------------< DATA_OUT >--------------------*/,{
2735 ** Because the size depends on the
2736 ** #define MAX_SCATTERL parameter,
2737 ** it is filled in at runtime.
2739 ** ##===========< i=0; i<MAX_SCATTERL >=========
2740 ** || SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_OUT)),
2741 ** || PADDR (dispatch),
2742 ** || SCR_MOVE_TBL ^ SCR_DATA_OUT,
2743 ** || offsetof (struct dsb, data[ i]),
2744 ** ##==========================================
2746 **---------------------------------------------------------
2749 }/*-------------------------< DATA_OUT2 >-------------------*/,{
2754 }/*--------------------------------------------------------*/
2757 static struct scripth scripth0 __initdata = {
2758 /*-------------------------< TRYLOOP >---------------------*/{
2760 ** Start the next entry.
2761 ** Called addresses point to the launch script in the CCB.
2762 ** They are patched by the main processor.
2764 ** Because the size depends on the
2765 ** #define MAX_START parameter, it is filled
2768 **-----------------------------------------------------------
2770 ** ##===========< I=0; i<MAX_START >===========
2773 ** ##==========================================
2775 **-----------------------------------------------------------
2778 }/*------------------------< TRYLOOP2 >---------------------*/,{
2782 #ifdef SCSI_NCR_CCB_DONE_SUPPORT
2784 }/*------------------------< DONE_QUEUE >-------------------*/,{
2786 ** Copy the CCB address to the next done entry.
2787 ** Because the size depends on the
2788 ** #define MAX_DONE parameter, it is filled
2791 **-----------------------------------------------------------
2793 ** ##===========< I=0; i<MAX_DONE >===========
2794 ** || SCR_COPY (sizeof(struct ccb *),
2795 ** || NADDR (header.cp),
2796 ** || NADDR (ccb_done[i]),
2798 ** || PADDR (done_end),
2799 ** ##==========================================
2801 **-----------------------------------------------------------
2804 }/*------------------------< DONE_QUEUE2 >------------------*/,{
2806 PADDRH (done_queue),
2808 #endif /* SCSI_NCR_CCB_DONE_SUPPORT */
2809 }/*------------------------< SELECT_NO_ATN >-----------------*/,{
2811 ** Set Initiator mode.
2812 ** And try to select this target without ATN.
2817 SCR_LOAD_REG (HS_REG, HS_SELECTING),
2819 SCR_SEL_TBL ^ offsetof (struct dsb, select),
2824 }/*-------------------------< CANCEL >------------------------*/,{
2826 SCR_LOAD_REG (scratcha, HS_ABORTED),
2830 }/*-------------------------< SKIP >------------------------*/,{
2831 SCR_LOAD_REG (scratcha, 0),
2834 ** This entry has been canceled.
2835 ** Next time use the next slot.
2841 ** The ncr doesn't have an indirect load
2842 ** or store command. So we have to
2843 ** copy part of the control block to a
2844 ** fixed place, where we can access it.
2846 ** We patch the address part of a
2847 ** COPY command with the DSA-register.
2853 ** Flush script prefetch if required
2857 ** then we do the actual copy.
2859 SCR_COPY (sizeof (struct head)),
2861 ** continued after the next label ...
2863 }/*-------------------------< SKIP2 >---------------------*/,{
2867 ** Initialize the status registers
2870 NADDR (header.status),
2873 ** Force host status.
2875 SCR_FROM_REG (scratcha),
2877 SCR_JUMPR ^ IFFALSE (MASK (0, HS_DONEMASK)),
2879 SCR_REG_REG (HS_REG, SCR_OR, HS_SKIPMASK),
2883 SCR_TO_REG (HS_REG),
2885 SCR_LOAD_REG (SS_REG, SAM_STAT_GOOD),
2890 },/*-------------------------< PAR_ERR_DATA_IN >---------------*/{
2892 ** Ignore all data in byte, until next phase
2894 SCR_JUMP ^ IFFALSE (WHEN (SCR_DATA_IN)),
2895 PADDRH (par_err_other),
2896 SCR_MOVE_ABS (1) ^ SCR_DATA_IN,
2900 },/*-------------------------< PAR_ERR_OTHER >------------------*/{
2904 SCR_REG_REG (PS_REG, SCR_ADD, 0x01),
2907 ** jump to dispatcher.
2911 }/*-------------------------< MSG_REJECT >---------------*/,{
2913 ** If a negotiation was in progress,
2914 ** negotiation failed.
2915 ** Otherwise, let the C code print
2918 SCR_FROM_REG (HS_REG),
2920 SCR_INT ^ IFFALSE (DATA (HS_NEGOTIATE)),
2921 SIR_REJECT_RECEIVED,
2922 SCR_INT ^ IFTRUE (DATA (HS_NEGOTIATE)),
2927 }/*-------------------------< MSG_IGN_RESIDUE >----------*/,{
2933 SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)),
2936 ** get residue size.
2938 SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
2941 ** Size is 0 .. ignore message.
2943 SCR_JUMP ^ IFTRUE (DATA (0)),
2946 ** Size is not 1 .. have to interrupt.
2948 SCR_JUMPR ^ IFFALSE (DATA (1)),
2951 ** Check for residue byte in swide register
2953 SCR_FROM_REG (scntl2),
2955 SCR_JUMPR ^ IFFALSE (MASK (WSR, WSR)),
2958 ** There IS data in the swide register.
2961 SCR_REG_REG (scntl2, SCR_OR, WSR),
2966 ** Load again the size to the sfbr register.
2968 SCR_FROM_REG (scratcha),
2975 }/*-------------------------< MSG_EXTENDED >-------------*/,{
2981 SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)),
2986 SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
2990 SCR_JUMP ^ IFTRUE (DATA (3)),
2992 SCR_JUMP ^ IFFALSE (DATA (2)),
2994 }/*-------------------------< MSG_EXT_2 >----------------*/,{
2997 SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)),
3000 ** get extended message code.
3002 SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
3004 SCR_JUMP ^ IFTRUE (DATA (EXTENDED_WDTR)),
3007 ** unknown extended message
3011 }/*-------------------------< MSG_WDTR >-----------------*/,{
3014 SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)),
3017 ** get data bus width
3019 SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
3022 ** let the host do the real work.
3027 ** let the target fetch our answer.
3033 SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_OUT)),
3034 PADDRH (nego_bad_phase),
3036 }/*-------------------------< SEND_WDTR >----------------*/,{
3038 ** Send the EXTENDED_WDTR
3040 SCR_MOVE_ABS (4) ^ SCR_MSG_OUT,
3046 PADDR (msg_out_done),
3048 }/*-------------------------< MSG_EXT_3 >----------------*/,{
3051 SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)),
3054 ** get extended message code.
3056 SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
3058 SCR_JUMP ^ IFTRUE (DATA (EXTENDED_SDTR)),
3061 ** unknown extended message
3066 }/*-------------------------< MSG_SDTR >-----------------*/,{
3069 SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)),
3072 ** get period and offset
3074 SCR_MOVE_ABS (2) ^ SCR_MSG_IN,
3077 ** let the host do the real work.
3082 ** let the target fetch our answer.
3088 SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_OUT)),
3089 PADDRH (nego_bad_phase),
3091 }/*-------------------------< SEND_SDTR >-------------*/,{
3093 ** Send the EXTENDED_SDTR
3095 SCR_MOVE_ABS (5) ^ SCR_MSG_OUT,
3101 PADDR (msg_out_done),
3103 }/*-------------------------< NEGO_BAD_PHASE >------------*/,{
3109 }/*-------------------------< MSG_OUT_ABORT >-------------*/,{
3111 ** After ABORT message,
3113 ** expect an immediate disconnect, ...
3115 SCR_REG_REG (scntl2, SCR_AND, 0x7f),
3117 SCR_CLR (SCR_ACK|SCR_ATN),
3122 ** ... and set the status to "ABORTED"
3124 SCR_LOAD_REG (HS_REG, HS_ABORTED),
3129 }/*-------------------------< HDATA_IN >-------------------*/,{
3131 ** Because the size depends on the
3132 ** #define MAX_SCATTERH parameter,
3133 ** it is filled in at runtime.
3135 ** ##==< i=MAX_SCATTERL; i<MAX_SCATTERL+MAX_SCATTERH >==
3136 ** || SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_IN)),
3137 ** || PADDR (dispatch),
3138 ** || SCR_MOVE_TBL ^ SCR_DATA_IN,
3139 ** || offsetof (struct dsb, data[ i]),
3140 ** ##===================================================
3142 **---------------------------------------------------------
3145 }/*-------------------------< HDATA_IN2 >------------------*/,{
3149 }/*-------------------------< HDATA_OUT >-------------------*/,{
3151 ** Because the size depends on the
3152 ** #define MAX_SCATTERH parameter,
3153 ** it is filled in at runtime.
3155 ** ##==< i=MAX_SCATTERL; i<MAX_SCATTERL+MAX_SCATTERH >==
3156 ** || SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_OUT)),
3157 ** || PADDR (dispatch),
3158 ** || SCR_MOVE_TBL ^ SCR_DATA_OUT,
3159 ** || offsetof (struct dsb, data[ i]),
3160 ** ##===================================================
3162 **---------------------------------------------------------
3165 }/*-------------------------< HDATA_OUT2 >------------------*/,{
3169 }/*-------------------------< RESET >----------------------*/,{
3171 ** Send a TARGET_RESET message if bad IDENTIFY
3172 ** received on reselection.
3174 SCR_LOAD_REG (scratcha, ABORT_TASK),
3177 PADDRH (abort_resel),
3178 }/*-------------------------< ABORTTAG >-------------------*/,{
3180 ** Abort a wrong tag received on reselection.
3182 SCR_LOAD_REG (scratcha, ABORT_TASK),
3185 PADDRH (abort_resel),
3186 }/*-------------------------< ABORT >----------------------*/,{
3188 ** Abort a reselection when no active CCB.
3190 SCR_LOAD_REG (scratcha, ABORT_TASK_SET),
3192 }/*-------------------------< ABORT_RESEL >----------------*/,{
3202 ** we expect an immediate disconnect
3204 SCR_REG_REG (scntl2, SCR_AND, 0x7f),
3206 SCR_MOVE_ABS (1) ^ SCR_MSG_OUT,
3211 SCR_CLR (SCR_ACK|SCR_ATN),
3217 }/*-------------------------< RESEND_IDENT >-------------------*/,{
3219 ** The target stays in MSG OUT phase after having acked
3220 ** Identify [+ Tag [+ Extended message ]]. Targets shall
3221 ** behave this way on parity error.
3222 ** We must send it again all the messages.
3224 SCR_SET (SCR_ATN), /* Shall be asserted 2 deskew delays before the */
3225 0, /* 1rst ACK = 90 ns. Hope the NCR is'nt too fast */
3228 }/*-------------------------< CLRATN_GO_ON >-------------------*/,{
3232 }/*-------------------------< NXTDSP_GO_ON >-------------------*/,{
3234 }/*-------------------------< SDATA_IN >-------------------*/,{
3235 SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_IN)),
3237 SCR_MOVE_TBL ^ SCR_DATA_IN,
3238 offsetof (struct dsb, sense),
3243 }/*-------------------------< DATA_IO >--------------------*/,{
3245 ** We jump here if the data direction was unknown at the
3246 ** time we had to queue the command to the scripts processor.
3247 ** Pointers had been set as follow in this situation:
3248 ** savep --> DATA_IO
3249 ** lastp --> start pointer when DATA_IN
3250 ** goalp --> goal pointer when DATA_IN
3251 ** wlastp --> start pointer when DATA_OUT
3252 ** wgoalp --> goal pointer when DATA_OUT
3253 ** This script sets savep/lastp/goalp according to the
3254 ** direction chosen by the target.
3256 SCR_JUMPR ^ IFTRUE (WHEN (SCR_DATA_OUT)),
3259 ** Direction is DATA IN.
3260 ** Warning: we jump here, even when phase is DATA OUT.
3263 NADDR (header.lastp),
3264 NADDR (header.savep),
3267 ** Jump to the SCRIPTS according to actual direction.
3270 NADDR (header.savep),
3275 ** Direction is DATA OUT.
3278 NADDR (header.wlastp),
3279 NADDR (header.lastp),
3281 NADDR (header.wgoalp),
3282 NADDR (header.goalp),
3285 }/*-------------------------< BAD_IDENTIFY >---------------*/,{
3287 ** If message phase but not an IDENTIFY,
3288 ** get some help from the C code.
3289 ** Old SCSI device may behave so.
3291 SCR_JUMPR ^ IFTRUE (MASK (0x80, 0x80)),
3294 SIR_RESEL_NO_IDENTIFY,
3298 ** Message is an IDENTIFY, but lun is unknown.
3299 ** Read the message, since we got it directly
3300 ** from the SCSI BUS data lines.
3301 ** Signal problem to C code for logging the event.
3302 ** Send an ABORT_TASK_SET to clear all pending tasks.
3306 SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
3310 }/*-------------------------< BAD_I_T_L >------------------*/,{
3312 ** We donnot have a task for that I_T_L.
3313 ** Signal problem to C code for logging the event.
3314 ** Send an ABORT_TASK_SET message.
3317 SIR_RESEL_BAD_I_T_L,
3320 }/*-------------------------< BAD_I_T_L_Q >----------------*/,{
3322 ** We donnot have a task that matches the tag.
3323 ** Signal problem to C code for logging the event.
3324 ** Send an ABORT_TASK message.
3327 SIR_RESEL_BAD_I_T_L_Q,
3330 }/*-------------------------< BAD_TARGET >-----------------*/,{
3332 ** We donnot know the target that reselected us.
3333 ** Grab the first message if any (IDENTIFY).
3334 ** Signal problem to C code for logging the event.
3335 ** TARGET_RESET message.
3338 SIR_RESEL_BAD_TARGET,
3339 SCR_JUMPR ^ IFFALSE (WHEN (SCR_MSG_IN)),
3341 SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
3345 }/*-------------------------< BAD_STATUS >-----------------*/,{
3347 ** If command resulted in either TASK_SET FULL,
3348 ** CHECK CONDITION or COMMAND TERMINATED,
3351 SCR_INT ^ IFTRUE (DATA (SAM_STAT_TASK_SET_FULL)),
3353 SCR_INT ^ IFTRUE (DATA (SAM_STAT_CHECK_CONDITION)),
3355 SCR_INT ^ IFTRUE (DATA (SAM_STAT_COMMAND_TERMINATED)),
3359 }/*-------------------------< START_RAM >-------------------*/,{
3361 ** Load the script into on-chip RAM,
3362 ** and jump to start point.
3366 PADDRH (start_ram0),
3368 ** Flush script prefetch if required
3371 SCR_COPY (sizeof (struct script)),
3372 }/*-------------------------< START_RAM0 >--------------------*/,{
3377 }/*-------------------------< STO_RESTART >-------------------*/,{
3380 ** Repair start queue (e.g. next time use the next slot)
3381 ** and jump to start point.
3388 }/*-------------------------< WAIT_DMA >-------------------*/,{
3390 ** For HP Zalon/53c720 systems, the Zalon interface
3391 ** between CPU and 53c720 does prefetches, which causes
3392 ** problems with self modifying scripts. The problem
3393 ** is overcome by calling a dummy subroutine after each
3394 ** modification, to force a refetch of the script on
3395 ** return from the subroutine.
3399 }/*-------------------------< SNOOPTEST >-------------------*/,{
3401 ** Read the variable.
3407 ** Write the variable.
3413 ** Read back the variable.
3418 }/*-------------------------< SNOOPEND >-------------------*/,{
3424 }/*--------------------------------------------------------*/
3427 /*==========================================================
3430 ** Fill in #define dependent parts of the script
3433 **==========================================================
3436 void __init ncr_script_fill (struct script * scr, struct scripth * scrh)
3442 for (i=0; i<MAX_START; i++) {
3447 BUG_ON((u_long)p != (u_long)&scrh->tryloop + sizeof (scrh->tryloop));
3449 #ifdef SCSI_NCR_CCB_DONE_SUPPORT
3451 p = scrh->done_queue;
3452 for (i = 0; i<MAX_DONE; i++) {
3453 *p++ =SCR_COPY (sizeof(struct ccb *));
3454 *p++ =NADDR (header.cp);
3455 *p++ =NADDR (ccb_done[i]);
3457 *p++ =PADDR (done_end);
3460 BUG_ON((u_long)p != (u_long)&scrh->done_queue+sizeof(scrh->done_queue));
3462 #endif /* SCSI_NCR_CCB_DONE_SUPPORT */
3465 for (i=0; i<MAX_SCATTERH; i++) {
3466 *p++ =SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_IN));
3467 *p++ =PADDR (dispatch);
3468 *p++ =SCR_MOVE_TBL ^ SCR_DATA_IN;
3469 *p++ =offsetof (struct dsb, data[i]);
3472 BUG_ON((u_long)p != (u_long)&scrh->hdata_in + sizeof (scrh->hdata_in));
3475 for (i=MAX_SCATTERH; i<MAX_SCATTERH+MAX_SCATTERL; i++) {
3476 *p++ =SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_IN));
3477 *p++ =PADDR (dispatch);
3478 *p++ =SCR_MOVE_TBL ^ SCR_DATA_IN;
3479 *p++ =offsetof (struct dsb, data[i]);
3482 BUG_ON((u_long)p != (u_long)&scr->data_in + sizeof (scr->data_in));
3484 p = scrh->hdata_out;
3485 for (i=0; i<MAX_SCATTERH; i++) {
3486 *p++ =SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_OUT));
3487 *p++ =PADDR (dispatch);
3488 *p++ =SCR_MOVE_TBL ^ SCR_DATA_OUT;
3489 *p++ =offsetof (struct dsb, data[i]);
3492 BUG_ON((u_long)p != (u_long)&scrh->hdata_out + sizeof (scrh->hdata_out));
3495 for (i=MAX_SCATTERH; i<MAX_SCATTERH+MAX_SCATTERL; i++) {
3496 *p++ =SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_OUT));
3497 *p++ =PADDR (dispatch);
3498 *p++ =SCR_MOVE_TBL ^ SCR_DATA_OUT;
3499 *p++ =offsetof (struct dsb, data[i]);
3502 BUG_ON((u_long) p != (u_long)&scr->data_out + sizeof (scr->data_out));
3505 /*==========================================================
3508 ** Copy and rebind a script.
3511 **==========================================================
3515 ncr_script_copy_and_bind (struct ncb *np, ncrcmd *src, ncrcmd *dst, int len)
3517 ncrcmd opcode, new, old, tmp1, tmp2;
3518 ncrcmd *start, *end;
3528 *dst++ = cpu_to_scr(opcode);
3531 ** If we forget to change the length
3532 ** in struct script, a field will be
3533 ** padded with 0. This is an illegal
3538 printk (KERN_ERR "%s: ERROR0 IN SCRIPT at %d.\n",
3539 ncr_name(np), (int) (src-start-1));
3543 if (DEBUG_FLAGS & DEBUG_SCRIPT)
3544 printk (KERN_DEBUG "%p: <%x>\n",
3545 (src-1), (unsigned)opcode);
3548 ** We don't have to decode ALL commands
3550 switch (opcode >> 28) {
3554 ** COPY has TWO arguments.
3559 if ((tmp1 & RELOC_MASK) == RELOC_KVAR)
3564 if ((tmp2 & RELOC_MASK) == RELOC_KVAR)
3567 if ((tmp1 ^ tmp2) & 3) {
3568 printk (KERN_ERR"%s: ERROR1 IN SCRIPT at %d.\n",
3569 ncr_name(np), (int) (src-start-1));
3573 ** If PREFETCH feature not enabled, remove
3574 ** the NO FLUSH bit if present.
3576 if ((opcode & SCR_NO_FLUSH) && !(np->features & FE_PFEN)) {
3577 dst[-1] = cpu_to_scr(opcode & ~SCR_NO_FLUSH);
3584 ** MOVE (absolute address)
3592 ** don't relocate if relative :-)
3594 if (opcode & 0x00800000)
3616 switch (old & RELOC_MASK) {
3617 case RELOC_REGISTER:
3618 new = (old & ~RELOC_MASK) + np->paddr;
3621 new = (old & ~RELOC_MASK) + np->p_script;
3624 new = (old & ~RELOC_MASK) + np->p_scripth;
3627 new = (old & ~RELOC_MASK) + np->p_ncb;
3631 if (((old & ~RELOC_MASK) <
3632 SCRIPT_KVAR_FIRST) ||
3633 ((old & ~RELOC_MASK) >
3635 panic("ncr KVAR out of range");
3636 new = vtophys(script_kvars[old &
3641 /* Don't relocate a 0 address. */
3648 panic("ncr_script_copy_and_bind: weird relocation %x\n", old);
3652 *dst++ = cpu_to_scr(new);
3655 *dst++ = cpu_to_scr(*src++);
3661 ** Linux host data structure
3668 #define PRINT_ADDR(cmd, arg...) dev_info(&cmd->device->sdev_gendev , ## arg)
3670 static void ncr_print_msg(struct ccb *cp, char *label, u_char *msg)
3672 PRINT_ADDR(cp->cmd, "%s: ", label);
3678 /*==========================================================
3680 ** NCR chip clock divisor table.
3681 ** Divisors are multiplied by 10,000,000 in order to make
3682 ** calculations more simple.
3684 **==========================================================
3688 static u_long div_10M[] =
3689 {2*_5M, 3*_5M, 4*_5M, 6*_5M, 8*_5M, 12*_5M, 16*_5M};
3692 /*===============================================================
3694 ** Prepare io register values used by ncr_init() according
3695 ** to selected and supported features.
3697 ** NCR chips allow burst lengths of 2, 4, 8, 16, 32, 64, 128
3698 ** transfers. 32,64,128 are only supported by 875 and 895 chips.
3699 ** We use log base 2 (burst length) as internal code, with
3700 ** value 0 meaning "burst disabled".
3702 **===============================================================
3706 * Burst length from burst code.
3708 #define burst_length(bc) (!(bc))? 0 : 1 << (bc)
3711 * Burst code from io register bits. Burst enable is ctest0 for c720
3713 #define burst_code(dmode, ctest0) \
3714 (ctest0) & 0x80 ? 0 : (((dmode) & 0xc0) >> 6) + 1
3717 * Set initial io register bits from burst code.
3719 static inline void ncr_init_burst(struct ncb *np, u_char bc)
3721 u_char *be = &np->rv_ctest0;
3723 np->rv_dmode &= ~(0x3 << 6);
3724 np->rv_ctest5 &= ~0x4;
3730 np->rv_dmode |= ((bc & 0x3) << 6);
3731 np->rv_ctest5 |= (bc & 0x4);
3735 static void __init ncr_prepare_setting(struct ncb *np)
3742 ** Save assumed BIOS setting
3745 np->sv_scntl0 = INB(nc_scntl0) & 0x0a;
3746 np->sv_scntl3 = INB(nc_scntl3) & 0x07;
3747 np->sv_dmode = INB(nc_dmode) & 0xce;
3748 np->sv_dcntl = INB(nc_dcntl) & 0xa8;
3749 np->sv_ctest0 = INB(nc_ctest0) & 0x84;
3750 np->sv_ctest3 = INB(nc_ctest3) & 0x01;
3751 np->sv_ctest4 = INB(nc_ctest4) & 0x80;
3752 np->sv_ctest5 = INB(nc_ctest5) & 0x24;
3753 np->sv_gpcntl = INB(nc_gpcntl);
3754 np->sv_stest2 = INB(nc_stest2) & 0x20;
3755 np->sv_stest4 = INB(nc_stest4);
3761 np->maxwide = (np->features & FE_WIDE)? 1 : 0;
3764 * Guess the frequency of the chip's clock.
3766 if (np->features & FE_ULTRA)
3767 np->clock_khz = 80000;
3769 np->clock_khz = 40000;
3772 * Get the clock multiplier factor.
3774 if (np->features & FE_QUAD)
3776 else if (np->features & FE_DBLR)
3782 * Measure SCSI clock frequency for chips
3783 * it may vary from assumed one.
3785 if (np->features & FE_VARCLK)
3786 ncr_getclock(np, np->multiplier);
3789 * Divisor to be used for async (timer pre-scaler).
3791 i = np->clock_divn - 1;
3793 if (10ul * SCSI_NCR_MIN_ASYNC * np->clock_khz > div_10M[i]) {
3798 np->rv_scntl3 = i+1;
3801 * Minimum synchronous period factor supported by the chip.
3802 * Btw, 'period' is in tenths of nanoseconds.
3805 period = (4 * div_10M[0] + np->clock_khz - 1) / np->clock_khz;
3806 if (period <= 250) np->minsync = 10;
3807 else if (period <= 303) np->minsync = 11;
3808 else if (period <= 500) np->minsync = 12;
3809 else np->minsync = (period + 40 - 1) / 40;
3812 * Check against chip SCSI standard support (SCSI-2,ULTRA,ULTRA2).
3815 if (np->minsync < 25 && !(np->features & FE_ULTRA))
3819 * Maximum synchronous period factor supported by the chip.
3822 period = (11 * div_10M[np->clock_divn - 1]) / (4 * np->clock_khz);
3823 np->maxsync = period > 2540 ? 254 : period / 10;
3826 ** Prepare initial value of other IO registers
3828 #if defined SCSI_NCR_TRUST_BIOS_SETTING
3829 np->rv_scntl0 = np->sv_scntl0;
3830 np->rv_dmode = np->sv_dmode;
3831 np->rv_dcntl = np->sv_dcntl;
3832 np->rv_ctest0 = np->sv_ctest0;
3833 np->rv_ctest3 = np->sv_ctest3;
3834 np->rv_ctest4 = np->sv_ctest4;
3835 np->rv_ctest5 = np->sv_ctest5;
3836 burst_max = burst_code(np->sv_dmode, np->sv_ctest0);
3840 ** Select burst length (dwords)
3842 burst_max = driver_setup.burst_max;
3843 if (burst_max == 255)
3844 burst_max = burst_code(np->sv_dmode, np->sv_ctest0);
3847 if (burst_max > np->maxburst)
3848 burst_max = np->maxburst;
3851 ** Select all supported special features
3853 if (np->features & FE_ERL)
3854 np->rv_dmode |= ERL; /* Enable Read Line */
3855 if (np->features & FE_BOF)
3856 np->rv_dmode |= BOF; /* Burst Opcode Fetch */
3857 if (np->features & FE_ERMP)
3858 np->rv_dmode |= ERMP; /* Enable Read Multiple */
3859 if (np->features & FE_PFEN)
3860 np->rv_dcntl |= PFEN; /* Prefetch Enable */
3861 if (np->features & FE_CLSE)
3862 np->rv_dcntl |= CLSE; /* Cache Line Size Enable */
3863 if (np->features & FE_WRIE)
3864 np->rv_ctest3 |= WRIE; /* Write and Invalidate */
3865 if (np->features & FE_DFS)
3866 np->rv_ctest5 |= DFS; /* Dma Fifo Size */
3867 if (np->features & FE_MUX)
3868 np->rv_ctest4 |= MUX; /* Host bus multiplex mode */
3869 if (np->features & FE_EA)
3870 np->rv_dcntl |= EA; /* Enable ACK */
3871 if (np->features & FE_EHP)
3872 np->rv_ctest0 |= EHP; /* Even host parity */
3875 ** Select some other
3877 if (driver_setup.master_parity)
3878 np->rv_ctest4 |= MPEE; /* Master parity checking */
3879 if (driver_setup.scsi_parity)
3880 np->rv_scntl0 |= 0x0a; /* full arb., ena parity, par->ATN */
3883 ** Get SCSI addr of host adapter (set by bios?).
3885 if (np->myaddr == 255) {
3886 np->myaddr = INB(nc_scid) & 0x07;
3888 np->myaddr = SCSI_NCR_MYADDR;
3891 #endif /* SCSI_NCR_TRUST_BIOS_SETTING */
3894 * Prepare initial io register bits for burst length
3896 ncr_init_burst(np, burst_max);
3899 ** Set SCSI BUS mode.
3901 ** - ULTRA2 chips (895/895A/896) report the current
3902 ** BUS mode through the STEST4 IO register.
3903 ** - For previous generation chips (825/825A/875),
3904 ** user has to tell us how to check against HVD,
3905 ** since a 100% safe algorithm is not possible.
3907 np->scsi_mode = SMODE_SE;
3908 if (np->features & FE_DIFF) {
3909 switch(driver_setup.diff_support) {
3910 case 4: /* Trust previous settings if present, then GPIO3 */
3911 if (np->sv_scntl3) {
3912 if (np->sv_stest2 & 0x20)
3913 np->scsi_mode = SMODE_HVD;
3917 case 3: /* SYMBIOS controllers report HVD through GPIO3 */
3918 if (INB(nc_gpreg) & 0x08)
3921 case 2: /* Set HVD unconditionally */
3922 np->scsi_mode = SMODE_HVD;
3924 case 1: /* Trust previous settings for HVD */
3925 if (np->sv_stest2 & 0x20)
3926 np->scsi_mode = SMODE_HVD;
3928 default:/* Don't care about HVD */
3932 if (np->scsi_mode == SMODE_HVD)
3933 np->rv_stest2 |= 0x20;
3936 ** Set LED support from SCRIPTS.
3937 ** Ignore this feature for boards known to use a
3938 ** specific GPIO wiring and for the 895A or 896
3939 ** that drive the LED directly.
3940 ** Also probe initial setting of GPIO0 as output.
3942 if ((driver_setup.led_pin) &&
3943 !(np->features & FE_LEDC) && !(np->sv_gpcntl & 0x01))
3944 np->features |= FE_LED0;
3949 switch(driver_setup.irqm & 3) {
3951 np->rv_dcntl |= IRQM;
3954 np->rv_dcntl |= (np->sv_dcntl & IRQM);
3961 ** Configure targets according to driver setup.
3962 ** Allow to override sync, wide and NOSCAN from
3963 ** boot command line.
3965 for (i = 0 ; i < MAX_TARGET ; i++) {
3966 struct tcb *tp = &np->target[i];
3968 tp->usrsync = driver_setup.default_sync;
3969 tp->usrwide = driver_setup.max_wide;
3970 tp->usrtags = MAX_TAGS;
3971 tp->period = 0xffff;
3972 if (!driver_setup.disconnection)
3973 np->target[i].usrflag = UF_NODISC;
3977 ** Announce all that stuff to user.
3980 printk(KERN_INFO "%s: ID %d, Fast-%d%s%s\n", ncr_name(np),
3982 np->minsync < 12 ? 40 : (np->minsync < 25 ? 20 : 10),
3983 (np->rv_scntl0 & 0xa) ? ", Parity Checking" : ", NO Parity",
3984 (np->rv_stest2 & 0x20) ? ", Differential" : "");
3986 if (bootverbose > 1) {
3987 printk (KERN_INFO "%s: initial SCNTL3/DMODE/DCNTL/CTEST3/4/5 = "
3988 "(hex) %02x/%02x/%02x/%02x/%02x/%02x\n",
3989 ncr_name(np), np->sv_scntl3, np->sv_dmode, np->sv_dcntl,
3990 np->sv_ctest3, np->sv_ctest4, np->sv_ctest5);
3992 printk (KERN_INFO "%s: final SCNTL3/DMODE/DCNTL/CTEST3/4/5 = "
3993 "(hex) %02x/%02x/%02x/%02x/%02x/%02x\n",
3994 ncr_name(np), np->rv_scntl3, np->rv_dmode, np->rv_dcntl,
3995 np->rv_ctest3, np->rv_ctest4, np->rv_ctest5);
3998 if (bootverbose && np->paddr2)
3999 printk (KERN_INFO "%s: on-chip RAM at 0x%lx\n",
4000 ncr_name(np), np->paddr2);
4003 /*==========================================================
4006 ** Done SCSI commands list management.
4008 ** We donnot enter the scsi_done() callback immediately
4009 ** after a command has been seen as completed but we
4010 ** insert it into a list which is flushed outside any kind
4011 ** of driver critical section.
4012 ** This allows to do minimal stuff under interrupt and
4013 ** inside critical sections and to also avoid locking up
4014 ** on recursive calls to driver entry points under SMP.
4015 ** In fact, the only kernel point which is entered by the
4016 ** driver with a driver lock set is kmalloc(GFP_ATOMIC)
4017 ** that shall not reenter the driver under any circumstances,
4020 **==========================================================
4022 static inline void ncr_queue_done_cmd(struct ncb *np, struct scsi_cmnd *cmd)
4024 unmap_scsi_data(np, cmd);
4025 cmd->host_scribble = (char *) np->done_list;
4026 np->done_list = cmd;
4029 static inline void ncr_flush_done_cmds(struct scsi_cmnd *lcmd)
4031 struct scsi_cmnd *cmd;
4035 lcmd = (struct scsi_cmnd *) cmd->host_scribble;
4036 cmd->scsi_done(cmd);
4040 /*==========================================================
4043 ** Prepare the next negotiation message if needed.
4045 ** Fill in the part of message buffer that contains the
4046 ** negotiation and the nego_status field of the CCB.
4047 ** Returns the size of the message in bytes.
4050 **==========================================================
4054 static int ncr_prepare_nego(struct ncb *np, struct ccb *cp, u_char *msgptr)
4056 struct tcb *tp = &np->target[cp->target];
4059 struct scsi_target *starget = tp->starget;
4061 /* negotiate wide transfers ? */
4062 if (!tp->widedone) {
4063 if (spi_support_wide(starget)) {
4069 /* negotiate synchronous transfers? */
4070 if (!nego && !tp->period) {
4071 if (spi_support_sync(starget)) {
4075 dev_info(&starget->dev, "target did not report SYNC.\n");
4081 msglen += spi_populate_sync_msg(msgptr + msglen,
4082 tp->maxoffs ? tp->minsync : 0, tp->maxoffs);
4085 msglen += spi_populate_width_msg(msgptr + msglen, tp->usrwide);
4089 cp->nego_status = nego;
4093 if (DEBUG_FLAGS & DEBUG_NEGO) {
4094 ncr_print_msg(cp, nego == NS_WIDE ?
4095 "wide msgout":"sync_msgout", msgptr);
4104 /*==========================================================
4107 ** Start execution of a SCSI command.
4108 ** This is called from the generic SCSI driver.
4111 **==========================================================
4113 static int ncr_queue_command (struct ncb *np, struct scsi_cmnd *cmd)
4115 struct scsi_device *sdev = cmd->device;
4116 struct tcb *tp = &np->target[sdev->id];
4117 struct lcb *lp = tp->lp[sdev->lun];
4121 u_char idmsg, *msgptr;
4126 /*---------------------------------------------
4128 ** Some shortcuts ...
4130 **---------------------------------------------
4132 if ((sdev->id == np->myaddr ) ||
4133 (sdev->id >= MAX_TARGET) ||
4134 (sdev->lun >= MAX_LUN )) {
4135 return(DID_BAD_TARGET);
4138 /*---------------------------------------------
4140 ** Complete the 1st TEST UNIT READY command
4141 ** with error condition if the device is
4142 ** flagged NOSCAN, in order to speed up
4145 **---------------------------------------------
4147 if ((cmd->cmnd[0] == 0 || cmd->cmnd[0] == 0x12) &&
4148 (tp->usrflag & UF_NOSCAN)) {
4149 tp->usrflag &= ~UF_NOSCAN;
4150 return DID_BAD_TARGET;
4153 if (DEBUG_FLAGS & DEBUG_TINY) {
4154 PRINT_ADDR(cmd, "CMD=%x ", cmd->cmnd[0]);
4157 /*---------------------------------------------------
4159 ** Assign a ccb / bind cmd.
4160 ** If resetting, shorten settle_time if necessary
4161 ** in order to avoid spurious timeouts.
4162 ** If resetting or no free ccb,
4163 ** insert cmd into the waiting list.
4165 **----------------------------------------------------
4167 if (np->settle_time && cmd->request->timeout >= HZ) {
4168 u_long tlimit = jiffies + cmd->request->timeout - HZ;
4169 if (time_after(np->settle_time, tlimit))
4170 np->settle_time = tlimit;
4173 if (np->settle_time || !(cp=ncr_get_ccb (np, cmd))) {
4174 insert_into_waiting_list(np, cmd);
4179 /*----------------------------------------------------
4181 ** Build the identify / tag / sdtr message
4183 **----------------------------------------------------
4186 idmsg = IDENTIFY(0, sdev->lun);
4188 if (cp ->tag != NO_TAG ||
4189 (cp != np->ccb && np->disc && !(tp->usrflag & UF_NODISC)))
4192 msgptr = cp->scsi_smsg;
4194 msgptr[msglen++] = idmsg;
4196 if (cp->tag != NO_TAG) {
4197 char order = np->order;
4200 ** Force ordered tag if necessary to avoid timeouts
4201 ** and to preserve interactivity.
4203 if (lp && time_after(jiffies, lp->tags_stime)) {
4204 if (lp->tags_smap) {
4205 order = ORDERED_QUEUE_TAG;
4206 if ((DEBUG_FLAGS & DEBUG_TAGS)||bootverbose>2){
4208 "ordered tag forced.\n");
4211 lp->tags_stime = jiffies + 3*HZ;
4212 lp->tags_smap = lp->tags_umap;
4217 ** Ordered write ops, unordered read ops.
4219 switch (cmd->cmnd[0]) {
4220 case 0x08: /* READ_SMALL (6) */
4221 case 0x28: /* READ_BIG (10) */
4222 case 0xa8: /* READ_HUGE (12) */
4223 order = SIMPLE_QUEUE_TAG;
4226 order = ORDERED_QUEUE_TAG;
4229 msgptr[msglen++] = order;
4231 ** Actual tags are numbered 1,3,5,..2*MAXTAGS+1,
4232 ** since we may have to deal with devices that have
4233 ** problems with #TAG 0 or too great #TAG numbers.
4235 msgptr[msglen++] = (cp->tag << 1) + 1;
4238 /*----------------------------------------------------
4240 ** Build the data descriptors
4242 **----------------------------------------------------
4245 direction = cmd->sc_data_direction;
4246 if (direction != DMA_NONE) {
4247 segments = ncr_scatter(np, cp, cp->cmd);
4249 ncr_free_ccb(np, cp);
4258 /*---------------------------------------------------
4260 ** negotiation required?
4262 ** (nego_status is filled by ncr_prepare_nego())
4264 **---------------------------------------------------
4267 cp->nego_status = 0;
4269 if ((!tp->widedone || !tp->period) && !tp->nego_cp && lp) {
4270 msglen += ncr_prepare_nego (np, cp, msgptr + msglen);
4273 /*----------------------------------------------------
4275 ** Determine xfer direction.
4277 **----------------------------------------------------
4280 direction = DMA_NONE;
4283 ** If data direction is BIDIRECTIONAL, speculate FROM_DEVICE
4284 ** but prepare alternate pointers for TO_DEVICE in case
4285 ** of our speculation will be just wrong.
4286 ** SCRIPTS will swap values if needed.
4289 case DMA_BIDIRECTIONAL:
4291 goalp = NCB_SCRIPT_PHYS (np, data_out2) + 8;
4292 if (segments <= MAX_SCATTERL)
4293 lastp = goalp - 8 - (segments * 16);
4295 lastp = NCB_SCRIPTH_PHYS (np, hdata_out2);
4296 lastp -= (segments - MAX_SCATTERL) * 16;
4298 if (direction != DMA_BIDIRECTIONAL)
4300 cp->phys.header.wgoalp = cpu_to_scr(goalp);
4301 cp->phys.header.wlastp = cpu_to_scr(lastp);
4303 case DMA_FROM_DEVICE:
4304 goalp = NCB_SCRIPT_PHYS (np, data_in2) + 8;
4305 if (segments <= MAX_SCATTERL)
4306 lastp = goalp - 8 - (segments * 16);
4308 lastp = NCB_SCRIPTH_PHYS (np, hdata_in2);
4309 lastp -= (segments - MAX_SCATTERL) * 16;
4314 lastp = goalp = NCB_SCRIPT_PHYS (np, no_data);
4319 ** Set all pointers values needed by SCRIPTS.
4320 ** If direction is unknown, start at data_io.
4322 cp->phys.header.lastp = cpu_to_scr(lastp);
4323 cp->phys.header.goalp = cpu_to_scr(goalp);
4325 if (direction == DMA_BIDIRECTIONAL)
4326 cp->phys.header.savep =
4327 cpu_to_scr(NCB_SCRIPTH_PHYS (np, data_io));
4329 cp->phys.header.savep= cpu_to_scr(lastp);
4332 ** Save the initial data pointer in order to be able
4333 ** to redo the command.
4335 cp->startp = cp->phys.header.savep;
4337 /*----------------------------------------------------
4341 **----------------------------------------------------
4344 ** physical -> virtual backlink
4345 ** Generic SCSI command
4351 cp->start.schedule.l_paddr = cpu_to_scr(NCB_SCRIPT_PHYS (np, select));
4352 cp->restart.schedule.l_paddr = cpu_to_scr(NCB_SCRIPT_PHYS (np, resel_dsa));
4356 cp->phys.select.sel_id = sdev_id(sdev);
4357 cp->phys.select.sel_scntl3 = tp->wval;
4358 cp->phys.select.sel_sxfer = tp->sval;
4362 cp->phys.smsg.addr = cpu_to_scr(CCB_PHYS (cp, scsi_smsg));
4363 cp->phys.smsg.size = cpu_to_scr(msglen);
4368 memcpy(cp->cdb_buf, cmd->cmnd, min_t(int, cmd->cmd_len, sizeof(cp->cdb_buf)));
4369 cp->phys.cmd.addr = cpu_to_scr(CCB_PHYS (cp, cdb_buf[0]));
4370 cp->phys.cmd.size = cpu_to_scr(cmd->cmd_len);
4375 cp->actualquirks = 0;
4376 cp->host_status = cp->nego_status ? HS_NEGOTIATE : HS_BUSY;
4377 cp->scsi_status = SAM_STAT_ILLEGAL;
4378 cp->parity_status = 0;
4380 cp->xerr_status = XE_OK;
4382 cp->sync_status = tp->sval;
4383 cp->wide_status = tp->wval;
4386 /*----------------------------------------------------
4388 ** Critical region: start this job.
4390 **----------------------------------------------------
4393 /* activate this job. */
4394 cp->magic = CCB_MAGIC;
4397 ** insert next CCBs into start queue.
4398 ** 2 max at a time is enough to flush the CCB wait queue.
4402 ncr_start_next_ccb(np, lp, 2);
4404 ncr_put_start_queue(np, cp);
4406 /* Command is successfully queued. */
4412 /*==========================================================
4415 ** Insert a CCB into the start queue and wake up the
4416 ** SCRIPTS processor.
4419 **==========================================================
4422 static void ncr_start_next_ccb(struct ncb *np, struct lcb *lp, int maxn)
4424 struct list_head *qp;
4430 while (maxn-- && lp->queuedccbs < lp->queuedepth) {
4431 qp = ncr_list_pop(&lp->wait_ccbq);
4435 cp = list_entry(qp, struct ccb, link_ccbq);
4436 list_add_tail(qp, &lp->busy_ccbq);
4437 lp->jump_ccb[cp->tag == NO_TAG ? 0 : cp->tag] =
4438 cpu_to_scr(CCB_PHYS (cp, restart));
4439 ncr_put_start_queue(np, cp);
4443 static void ncr_put_start_queue(struct ncb *np, struct ccb *cp)
4448 ** insert into start queue.
4450 if (!np->squeueput) np->squeueput = 1;
4451 qidx = np->squeueput + 2;
4452 if (qidx >= MAX_START + MAX_START) qidx = 1;
4454 np->scripth->tryloop [qidx] = cpu_to_scr(NCB_SCRIPT_PHYS (np, idle));
4456 np->scripth->tryloop [np->squeueput] = cpu_to_scr(CCB_PHYS (cp, start));
4458 np->squeueput = qidx;
4462 if (DEBUG_FLAGS & DEBUG_QUEUE)
4463 printk ("%s: queuepos=%d.\n", ncr_name (np), np->squeueput);
4466 ** Script processor may be waiting for reselect.
4470 OUTB (nc_istat, SIGP);
4474 static int ncr_reset_scsi_bus(struct ncb *np, int enab_int, int settle_delay)
4479 np->settle_time = jiffies + settle_delay * HZ;
4481 if (bootverbose > 1)
4482 printk("%s: resetting, "
4483 "command processing suspended for %d seconds\n",
4484 ncr_name(np), settle_delay);
4486 ncr_chip_reset(np, 100);
4487 udelay(2000); /* The 895 needs time for the bus mode to settle */
4489 OUTW (nc_sien, RST);
4491 ** Enable Tolerant, reset IRQD if present and
4492 ** properly set IRQ mode, prior to resetting the bus.
4494 OUTB (nc_stest3, TE);
4495 OUTB (nc_scntl1, CRST);
4498 if (!driver_setup.bus_check)
4501 ** Check for no terminators or SCSI bus shorts to ground.
4502 ** Read SCSI data bus, data parity bits and control signals.
4503 ** We are expecting RESET to be TRUE and other signals to be
4507 term = INB(nc_sstat0);
4508 term = ((term & 2) << 7) + ((term & 1) << 17); /* rst sdp0 */
4509 term |= ((INB(nc_sstat2) & 0x01) << 26) | /* sdp1 */
4510 ((INW(nc_sbdl) & 0xff) << 9) | /* d7-0 */
4511 ((INW(nc_sbdl) & 0xff00) << 10) | /* d15-8 */
4512 INB(nc_sbcl); /* req ack bsy sel atn msg cd io */
4514 if (!(np->features & FE_WIDE))
4517 if (term != (2<<7)) {
4518 printk("%s: suspicious SCSI data while resetting the BUS.\n",
4520 printk("%s: %sdp0,d7-0,rst,req,ack,bsy,sel,atn,msg,c/d,i/o = "
4521 "0x%lx, expecting 0x%lx\n",
4523 (np->features & FE_WIDE) ? "dp1,d15-8," : "",
4524 (u_long)term, (u_long)(2<<7));
4525 if (driver_setup.bus_check == 1)
4529 OUTB (nc_scntl1, 0);
4534 * Start reset process.
4535 * If reset in progress do nothing.
4536 * The interrupt handler will reinitialize the chip.
4537 * The timeout handler will wait for settle_time before
4538 * clearing it and so resuming command processing.
4540 static void ncr_start_reset(struct ncb *np)
4542 if (!np->settle_time) {
4543 ncr_reset_scsi_bus(np, 1, driver_setup.settle_delay);
4547 /*==========================================================
4550 ** Reset the SCSI BUS.
4551 ** This is called from the generic SCSI driver.
4554 **==========================================================
4556 static int ncr_reset_bus (struct ncb *np, struct scsi_cmnd *cmd, int sync_reset)
4558 /* struct scsi_device *device = cmd->device; */
4563 * Return immediately if reset is in progress.
4565 if (np->settle_time) {
4569 * Start the reset process.
4570 * The script processor is then assumed to be stopped.
4571 * Commands will now be queued in the waiting list until a settle
4572 * delay of 2 seconds will be completed.
4574 ncr_start_reset(np);
4576 * First, look in the wakeup list
4578 for (found=0, cp=np->ccb; cp; cp=cp->link_ccb) {
4580 ** look for the ccb of this command.
4582 if (cp->host_status == HS_IDLE) continue;
4583 if (cp->cmd == cmd) {
4589 * Then, look in the waiting list
4591 if (!found && retrieve_from_waiting_list(0, np, cmd))
4594 * Wake-up all awaiting commands with DID_RESET.
4596 reset_waiting_list(np);
4598 * Wake-up all pending commands with HS_RESET -> DID_RESET.
4600 ncr_wakeup(np, HS_RESET);
4602 * If the involved command was not in a driver queue, and the
4603 * scsi driver told us reset is synchronous, and the command is not
4604 * currently in the waiting list, complete it with DID_RESET status,
4605 * in order to keep it alive.
4607 if (!found && sync_reset && !retrieve_from_waiting_list(0, np, cmd)) {
4608 set_host_byte(cmd, DID_RESET);
4609 ncr_queue_done_cmd(np, cmd);
4615 #if 0 /* unused and broken.. */
4616 /*==========================================================
4619 ** Abort an SCSI command.
4620 ** This is called from the generic SCSI driver.
4623 **==========================================================
4625 static int ncr_abort_command (struct ncb *np, struct scsi_cmnd *cmd)
4627 /* struct scsi_device *device = cmd->device; */
4633 * First, look for the scsi command in the waiting list
4635 if (remove_from_waiting_list(np, cmd)) {
4636 set_host_byte(cmd, DID_ABORT);
4637 ncr_queue_done_cmd(np, cmd);
4638 return SCSI_ABORT_SUCCESS;
4642 * Then, look in the wakeup list
4644 for (found=0, cp=np->ccb; cp; cp=cp->link_ccb) {
4646 ** look for the ccb of this command.
4648 if (cp->host_status == HS_IDLE) continue;
4649 if (cp->cmd == cmd) {
4656 return SCSI_ABORT_NOT_RUNNING;
4659 if (np->settle_time) {
4660 return SCSI_ABORT_SNOOZE;
4664 ** If the CCB is active, patch schedule jumps for the
4665 ** script to abort the command.
4668 switch(cp->host_status) {
4671 printk ("%s: abort ccb=%p (cancel)\n", ncr_name (np), cp);
4672 cp->start.schedule.l_paddr =
4673 cpu_to_scr(NCB_SCRIPTH_PHYS (np, cancel));
4674 retv = SCSI_ABORT_PENDING;
4677 cp->restart.schedule.l_paddr =
4678 cpu_to_scr(NCB_SCRIPTH_PHYS (np, abort));
4679 retv = SCSI_ABORT_PENDING;
4682 retv = SCSI_ABORT_NOT_RUNNING;
4688 ** If there are no requests, the script
4689 ** processor will sleep on SEL_WAIT_RESEL.
4690 ** Let's wake it up, since it may have to work.
4692 OUTB (nc_istat, SIGP);
4698 static void ncr_detach(struct ncb *np)
4707 /* Local copy so we don't access np after freeing it! */
4708 strlcpy(inst_name, ncr_name(np), sizeof(inst_name));
4710 printk("%s: releasing host resources\n", ncr_name(np));
4713 ** Stop the ncr_timeout process
4714 ** Set release_stage to 1 and wait that ncr_timeout() set it to 2.
4717 #ifdef DEBUG_NCR53C8XX
4718 printk("%s: stopping the timer\n", ncr_name(np));
4720 np->release_stage = 1;
4721 for (i = 50 ; i && np->release_stage != 2 ; i--)
4723 if (np->release_stage != 2)
4724 printk("%s: the timer seems to be already stopped\n", ncr_name(np));
4725 else np->release_stage = 2;
4728 ** Disable chip interrupts
4731 #ifdef DEBUG_NCR53C8XX
4732 printk("%s: disabling chip interrupts\n", ncr_name(np));
4739 ** Restore bios setting for automatic clock detection.
4742 printk("%s: resetting chip\n", ncr_name(np));
4743 ncr_chip_reset(np, 100);
4745 OUTB(nc_dmode, np->sv_dmode);
4746 OUTB(nc_dcntl, np->sv_dcntl);
4747 OUTB(nc_ctest0, np->sv_ctest0);
4748 OUTB(nc_ctest3, np->sv_ctest3);
4749 OUTB(nc_ctest4, np->sv_ctest4);
4750 OUTB(nc_ctest5, np->sv_ctest5);
4751 OUTB(nc_gpcntl, np->sv_gpcntl);
4752 OUTB(nc_stest2, np->sv_stest2);
4754 ncr_selectclock(np, np->sv_scntl3);
4757 ** Free allocated ccb(s)
4760 while ((cp=np->ccb->link_ccb) != NULL) {
4761 np->ccb->link_ccb = cp->link_ccb;
4762 if (cp->host_status) {
4763 printk("%s: shall free an active ccb (host_status=%d)\n",
4764 ncr_name(np), cp->host_status);
4766 #ifdef DEBUG_NCR53C8XX
4767 printk("%s: freeing ccb (%lx)\n", ncr_name(np), (u_long) cp);
4769 m_free_dma(cp, sizeof(*cp), "CCB");
4772 /* Free allocated tp(s) */
4774 for (target = 0; target < MAX_TARGET ; target++) {
4775 tp=&np->target[target];
4776 for (lun = 0 ; lun < MAX_LUN ; lun++) {
4779 #ifdef DEBUG_NCR53C8XX
4780 printk("%s: freeing lp (%lx)\n", ncr_name(np), (u_long) lp);
4782 if (lp->jump_ccb != &lp->jump_ccb_0)
4783 m_free_dma(lp->jump_ccb,256,"JUMP_CCB");
4784 m_free_dma(lp, sizeof(*lp), "LCB");
4790 m_free_dma(np->scripth0, sizeof(struct scripth), "SCRIPTH");
4792 m_free_dma(np->script0, sizeof(struct script), "SCRIPT");
4794 m_free_dma(np->ccb, sizeof(struct ccb), "CCB");
4795 m_free_dma(np, sizeof(struct ncb), "NCB");
4797 printk("%s: host resources successfully released\n", inst_name);
4800 /*==========================================================
4803 ** Complete execution of a SCSI command.
4804 ** Signal completion to the generic SCSI driver.
4807 **==========================================================
4810 void ncr_complete (struct ncb *np, struct ccb *cp)
4812 struct scsi_cmnd *cmd;
4820 if (!cp || cp->magic != CCB_MAGIC || !cp->cmd)
4824 ** Print minimal debug information.
4827 if (DEBUG_FLAGS & DEBUG_TINY)
4828 printk ("CCB=%lx STAT=%x/%x\n", (unsigned long)cp,
4829 cp->host_status,cp->scsi_status);
4832 ** Get command, target and lun pointers.
4837 tp = &np->target[cmd->device->id];
4838 lp = tp->lp[cmd->device->lun];
4841 ** We donnot queue more than 1 ccb per target
4842 ** with negotiation at any time. If this ccb was
4843 ** used for negotiation, clear this info in the tcb.
4846 if (cp == tp->nego_cp)
4850 ** If auto-sense performed, change scsi status.
4852 if (cp->auto_sense) {
4853 cp->scsi_status = cp->auto_sense;
4857 ** If we were recovering from queue full or performing
4858 ** auto-sense, requeue skipped CCBs to the wait queue.
4861 if (lp && lp->held_ccb) {
4862 if (cp == lp->held_ccb) {
4863 list_splice_init(&lp->skip_ccbq, &lp->wait_ccbq);
4864 lp->held_ccb = NULL;
4869 ** Check for parity errors.
4872 if (cp->parity_status > 1) {
4873 PRINT_ADDR(cmd, "%d parity error(s).\n",cp->parity_status);
4877 ** Check for extended errors.
4880 if (cp->xerr_status != XE_OK) {
4881 switch (cp->xerr_status) {
4883 PRINT_ADDR(cmd, "extraneous data discarded.\n");
4886 PRINT_ADDR(cmd, "invalid scsi phase (4/5).\n");
4889 PRINT_ADDR(cmd, "extended error %d.\n",
4893 if (cp->host_status==HS_COMPLETE)
4894 cp->host_status = HS_FAIL;
4898 ** Print out any error for debugging purpose.
4900 if (DEBUG_FLAGS & (DEBUG_RESULT|DEBUG_TINY)) {
4901 if (cp->host_status != HS_COMPLETE ||
4902 cp->scsi_status != SAM_STAT_GOOD) {
4903 PRINT_ADDR(cmd, "ERROR: cmd=%x host_status=%x "
4904 "scsi_status=%x\n", cmd->cmnd[0],
4905 cp->host_status, cp->scsi_status);
4910 ** Check the status.
4913 if ( (cp->host_status == HS_COMPLETE)
4914 && (cp->scsi_status == SAM_STAT_GOOD ||
4915 cp->scsi_status == SAM_STAT_CONDITION_MET)) {
4917 * All went well (GOOD status).
4918 * CONDITION MET status is returned on
4919 * `Pre-Fetch' or `Search data' success.
4921 set_status_byte(cmd, cp->scsi_status);
4925 ** Could dig out the correct value for resid,
4926 ** but it would be quite complicated.
4928 /* if (cp->phys.header.lastp != cp->phys.header.goalp) */
4931 ** Allocate the lcb if not yet.
4934 ncr_alloc_lcb (np, cmd->device->id, cmd->device->lun);
4936 tp->bytes += cp->data_len;
4940 ** If tags was reduced due to queue full,
4941 ** increase tags if 1000 good status received.
4943 if (lp && lp->usetags && lp->numtags < lp->maxtags) {
4945 if (lp->num_good >= 1000) {
4948 ncr_setup_tags (np, cmd->device);
4951 } else if ((cp->host_status == HS_COMPLETE)
4952 && (cp->scsi_status == SAM_STAT_CHECK_CONDITION)) {
4954 ** Check condition code
4956 set_status_byte(cmd, SAM_STAT_CHECK_CONDITION);
4959 ** Copy back sense data to caller's buffer.
4961 memcpy(cmd->sense_buffer, cp->sense_buf,
4962 min_t(size_t, SCSI_SENSE_BUFFERSIZE,
4963 sizeof(cp->sense_buf)));
4965 if (DEBUG_FLAGS & (DEBUG_RESULT|DEBUG_TINY)) {
4966 u_char *p = cmd->sense_buffer;
4968 PRINT_ADDR(cmd, "sense data:");
4969 for (i=0; i<14; i++) printk (" %x", *p++);
4972 } else if ((cp->host_status == HS_COMPLETE)
4973 && (cp->scsi_status == SAM_STAT_RESERVATION_CONFLICT)) {
4975 ** Reservation Conflict condition code
4977 set_status_byte(cmd, SAM_STAT_RESERVATION_CONFLICT);
4979 } else if ((cp->host_status == HS_COMPLETE)
4980 && (cp->scsi_status == SAM_STAT_BUSY ||
4981 cp->scsi_status == SAM_STAT_TASK_SET_FULL)) {
4986 set_status_byte(cmd, cp->scsi_status);
4988 } else if ((cp->host_status == HS_SEL_TIMEOUT)
4989 || (cp->host_status == HS_TIMEOUT)) {
4994 set_status_byte(cmd, cp->scsi_status);
4995 set_host_byte(cmd, DID_TIME_OUT);
4997 } else if (cp->host_status == HS_RESET) {
5002 set_status_byte(cmd, cp->scsi_status);
5003 set_host_byte(cmd, DID_RESET);
5005 } else if (cp->host_status == HS_ABORTED) {
5010 set_status_byte(cmd, cp->scsi_status);
5011 set_host_byte(cmd, DID_ABORT);
5016 ** Other protocol messes
5018 PRINT_ADDR(cmd, "COMMAND FAILED (%x %x) @%p.\n",
5019 cp->host_status, cp->scsi_status, cp);
5021 set_status_byte(cmd, cp->scsi_status);
5022 set_host_byte(cmd, DID_ERROR);
5029 if (tp->usrflag & UF_TRACE) {
5032 PRINT_ADDR(cmd, " CMD:");
5033 p = (u_char*) &cmd->cmnd[0];
5034 for (i=0; i<cmd->cmd_len; i++) printk (" %x", *p++);
5036 if (cp->host_status==HS_COMPLETE) {
5037 switch (cp->scsi_status) {
5041 case SAM_STAT_CHECK_CONDITION:
5043 p = (u_char*) &cmd->sense_buffer;
5044 for (i=0; i<14; i++)
5045 printk (" %x", *p++);
5048 printk (" STAT: %x\n", cp->scsi_status);
5051 } else printk (" HOSTERROR: %x", cp->host_status);
5058 ncr_free_ccb (np, cp);
5061 ** requeue awaiting scsi commands for this lun.
5063 if (lp && lp->queuedccbs < lp->queuedepth &&
5064 !list_empty(&lp->wait_ccbq))
5065 ncr_start_next_ccb(np, lp, 2);
5068 ** requeue awaiting scsi commands for this controller.
5070 if (np->waiting_list)
5071 requeue_waiting_list(np);
5074 ** signal completion to generic driver.
5076 ncr_queue_done_cmd(np, cmd);
5079 /*==========================================================
5082 ** Signal all (or one) control block done.
5085 **==========================================================
5089 ** This CCB has been skipped by the NCR.
5090 ** Queue it in the corresponding unit queue.
5092 static void ncr_ccb_skipped(struct ncb *np, struct ccb *cp)
5094 struct tcb *tp = &np->target[cp->target];
5095 struct lcb *lp = tp->lp[cp->lun];
5097 if (lp && cp != np->ccb) {
5098 cp->host_status &= ~HS_SKIPMASK;
5099 cp->start.schedule.l_paddr =
5100 cpu_to_scr(NCB_SCRIPT_PHYS (np, select));
5101 list_move_tail(&cp->link_ccbq, &lp->skip_ccbq);
5113 ** The NCR has completed CCBs.
5114 ** Look at the DONE QUEUE if enabled, otherwise scan all CCBs
5116 void ncr_wakeup_done (struct ncb *np)
5119 #ifdef SCSI_NCR_CCB_DONE_SUPPORT
5122 i = np->ccb_done_ic;
5128 cp = np->ccb_done[j];
5129 if (!CCB_DONE_VALID(cp))
5132 np->ccb_done[j] = (struct ccb *)CCB_DONE_EMPTY;
5133 np->scripth->done_queue[5*j + 4] =
5134 cpu_to_scr(NCB_SCRIPT_PHYS (np, done_plug));
5136 np->scripth->done_queue[5*i + 4] =
5137 cpu_to_scr(NCB_SCRIPT_PHYS (np, done_end));
5139 if (cp->host_status & HS_DONEMASK)
5140 ncr_complete (np, cp);
5141 else if (cp->host_status & HS_SKIPMASK)
5142 ncr_ccb_skipped (np, cp);
5146 np->ccb_done_ic = i;
5150 if (cp->host_status & HS_DONEMASK)
5151 ncr_complete (np, cp);
5152 else if (cp->host_status & HS_SKIPMASK)
5153 ncr_ccb_skipped (np, cp);
5160 ** Complete all active CCBs.
5162 void ncr_wakeup (struct ncb *np, u_long code)
5164 struct ccb *cp = np->ccb;
5167 if (cp->host_status != HS_IDLE) {
5168 cp->host_status = code;
5169 ncr_complete (np, cp);
5179 /* Some initialisation must be done immediately following reset, for 53c720,
5180 * at least. EA (dcntl bit 5) isn't set here as it is set once only in
5181 * the _detect function.
5183 static void ncr_chip_reset(struct ncb *np, int delay)
5185 OUTB (nc_istat, SRST);
5187 OUTB (nc_istat, 0 );
5189 if (np->features & FE_EHP)
5190 OUTB (nc_ctest0, EHP);
5191 if (np->features & FE_MUX)
5192 OUTB (nc_ctest4, MUX);
5196 /*==========================================================
5202 **==========================================================
5205 void ncr_init (struct ncb *np, int reset, char * msg, u_long code)
5210 ** Reset chip if asked, otherwise just clear fifos.
5214 OUTB (nc_istat, SRST);
5218 OUTB (nc_stest3, TE|CSF);
5219 OUTONB (nc_ctest3, CLF);
5226 if (msg) printk (KERN_INFO "%s: restart (%s).\n", ncr_name (np), msg);
5229 ** Clear Start Queue
5231 np->queuedepth = MAX_START - 1; /* 1 entry needed as end marker */
5232 for (i = 1; i < MAX_START + MAX_START; i += 2)
5233 np->scripth0->tryloop[i] =
5234 cpu_to_scr(NCB_SCRIPT_PHYS (np, idle));
5237 ** Start at first entry.
5240 np->script0->startpos[0] = cpu_to_scr(NCB_SCRIPTH_PHYS (np, tryloop));
5242 #ifdef SCSI_NCR_CCB_DONE_SUPPORT
5246 for (i = 0; i < MAX_DONE; i++) {
5247 np->ccb_done[i] = (struct ccb *)CCB_DONE_EMPTY;
5248 np->scripth0->done_queue[5*i + 4] =
5249 cpu_to_scr(NCB_SCRIPT_PHYS (np, done_end));
5254 ** Start at first entry.
5256 np->script0->done_pos[0] = cpu_to_scr(NCB_SCRIPTH_PHYS (np,done_queue));
5257 np->ccb_done_ic = MAX_DONE-1;
5258 np->scripth0->done_queue[5*(MAX_DONE-1) + 4] =
5259 cpu_to_scr(NCB_SCRIPT_PHYS (np, done_plug));
5262 ** Wakeup all pending jobs.
5264 ncr_wakeup (np, code);
5271 ** Remove reset; big delay because the 895 needs time for the
5272 ** bus mode to settle
5274 ncr_chip_reset(np, 2000);
5276 OUTB (nc_scntl0, np->rv_scntl0 | 0xc0);
5277 /* full arb., ena parity, par->ATN */
5278 OUTB (nc_scntl1, 0x00); /* odd parity, and remove CRST!! */
5280 ncr_selectclock(np, np->rv_scntl3); /* Select SCSI clock */
5282 OUTB (nc_scid , RRE|np->myaddr); /* Adapter SCSI address */
5283 OUTW (nc_respid, 1ul<<np->myaddr); /* Id to respond to */
5284 OUTB (nc_istat , SIGP ); /* Signal Process */
5285 OUTB (nc_dmode , np->rv_dmode); /* Burst length, dma mode */
5286 OUTB (nc_ctest5, np->rv_ctest5); /* Large fifo + large burst */
5288 OUTB (nc_dcntl , NOCOM|np->rv_dcntl); /* Protect SFBR */
5289 OUTB (nc_ctest0, np->rv_ctest0); /* 720: CDIS and EHP */
5290 OUTB (nc_ctest3, np->rv_ctest3); /* Write and invalidate */
5291 OUTB (nc_ctest4, np->rv_ctest4); /* Master parity checking */
5293 OUTB (nc_stest2, EXT|np->rv_stest2); /* Extended Sreq/Sack filtering */
5294 OUTB (nc_stest3, TE); /* TolerANT enable */
5295 OUTB (nc_stime0, 0x0c ); /* HTH disabled STO 0.25 sec */
5298 ** Disable disconnects.
5304 ** Enable GPIO0 pin for writing if LED support.
5307 if (np->features & FE_LED0) {
5308 OUTOFFB (nc_gpcntl, 0x01);
5315 OUTW (nc_sien , STO|HTH|MA|SGE|UDC|RST|PAR);
5316 OUTB (nc_dien , MDPE|BF|ABRT|SSI|SIR|IID);
5319 ** Fill in target structure.
5320 ** Reinitialize usrsync.
5321 ** Reinitialize usrwide.
5322 ** Prepare sync negotiation according to actual SCSI bus mode.
5325 for (i=0;i<MAX_TARGET;i++) {
5326 struct tcb *tp = &np->target[i];
5329 tp->wval = np->rv_scntl3;
5331 if (tp->usrsync != 255) {
5332 if (tp->usrsync <= np->maxsync) {
5333 if (tp->usrsync < np->minsync) {
5334 tp->usrsync = np->minsync;
5341 if (tp->usrwide > np->maxwide)
5342 tp->usrwide = np->maxwide;
5347 ** Start script processor.
5351 printk ("%s: Downloading SCSI SCRIPTS.\n",
5353 OUTL (nc_scratcha, vtobus(np->script0));
5354 OUTL_DSP (NCB_SCRIPTH_PHYS (np, start_ram));
5357 OUTL_DSP (NCB_SCRIPT_PHYS (np, start));
5360 /*==========================================================
5362 ** Prepare the negotiation values for wide and
5363 ** synchronous transfers.
5365 **==========================================================
5368 static void ncr_negotiate (struct ncb* np, struct tcb* tp)
5371 ** minsync unit is 4ns !
5374 u_long minsync = tp->usrsync;
5377 ** SCSI bus mode limit
5380 if (np->scsi_mode && np->scsi_mode == SMODE_SE) {
5381 if (minsync < 12) minsync = 12;
5388 if (minsync < np->minsync)
5389 minsync = np->minsync;
5395 if (minsync > np->maxsync)
5398 if (tp->maxoffs > np->maxoffs)
5399 tp->maxoffs = np->maxoffs;
5401 tp->minsync = minsync;
5402 tp->maxoffs = (minsync<255 ? tp->maxoffs : 0);
5405 ** period=0: has to negotiate sync transfer
5411 ** widedone=0: has to negotiate wide transfer
5416 /*==========================================================
5418 ** Get clock factor and sync divisor for a given
5419 ** synchronous factor period.
5420 ** Returns the clock factor (in sxfer) and scntl3
5421 ** synchronous divisor field.
5423 **==========================================================
5426 static void ncr_getsync(struct ncb *np, u_char sfac, u_char *fakp, u_char *scntl3p)
5428 u_long clk = np->clock_khz; /* SCSI clock frequency in kHz */
5429 int div = np->clock_divn; /* Number of divisors supported */
5430 u_long fak; /* Sync factor in sxfer */
5431 u_long per; /* Period in tenths of ns */
5432 u_long kpc; /* (per * clk) */
5435 ** Compute the synchronous period in tenths of nano-seconds
5437 if (sfac <= 10) per = 250;
5438 else if (sfac == 11) per = 303;
5439 else if (sfac == 12) per = 500;
5440 else per = 40 * sfac;
5443 ** Look for the greatest clock divisor that allows an
5444 ** input speed faster than the period.
5448 if (kpc >= (div_10M[div] << 2)) break;
5451 ** Calculate the lowest clock factor that allows an output
5452 ** speed not faster than the period.
5454 fak = (kpc - 1) / div_10M[div] + 1;
5456 #if 0 /* This optimization does not seem very useful */
5458 per = (fak * div_10M[div]) / clk;
5461 ** Why not to try the immediate lower divisor and to choose
5462 ** the one that allows the fastest output speed ?
5463 ** We don't want input speed too much greater than output speed.
5465 if (div >= 1 && fak < 8) {
5467 fak2 = (kpc - 1) / div_10M[div-1] + 1;
5468 per2 = (fak2 * div_10M[div-1]) / clk;
5469 if (per2 < per && fak2 <= 8) {
5477 if (fak < 4) fak = 4; /* Should never happen, too bad ... */
5480 ** Compute and return sync parameters for the ncr
5483 *scntl3p = ((div+1) << 4) + (sfac < 25 ? 0x80 : 0);
5487 /*==========================================================
5489 ** Set actual values, sync status and patch all ccbs of
5490 ** a target according to new sync/wide agreement.
5492 **==========================================================
5495 static void ncr_set_sync_wide_status (struct ncb *np, u_char target)
5498 struct tcb *tp = &np->target[target];
5501 ** set actual value and sync_status
5503 OUTB (nc_sxfer, tp->sval);
5504 np->sync_st = tp->sval;
5505 OUTB (nc_scntl3, tp->wval);
5506 np->wide_st = tp->wval;
5509 ** patch ALL ccbs of this target.
5511 for (cp = np->ccb; cp; cp = cp->link_ccb) {
5512 if (!cp->cmd) continue;
5513 if (scmd_id(cp->cmd) != target) continue;
5515 cp->sync_status = tp->sval;
5516 cp->wide_status = tp->wval;
5518 cp->phys.select.sel_scntl3 = tp->wval;
5519 cp->phys.select.sel_sxfer = tp->sval;
5523 /*==========================================================
5525 ** Switch sync mode for current job and it's target
5527 **==========================================================
5530 static void ncr_setsync (struct ncb *np, struct ccb *cp, u_char scntl3, u_char sxfer)
5532 struct scsi_cmnd *cmd = cp->cmd;
5534 u_char target = INB (nc_sdid) & 0x0f;
5537 BUG_ON(target != (scmd_id(cmd) & 0xf));
5539 tp = &np->target[target];
5541 if (!scntl3 || !(sxfer & 0x1f))
5542 scntl3 = np->rv_scntl3;
5543 scntl3 = (scntl3 & 0xf0) | (tp->wval & EWS) | (np->rv_scntl3 & 0x07);
5546 ** Deduce the value of controller sync period from scntl3.
5547 ** period is in tenths of nano-seconds.
5550 idiv = ((scntl3 >> 4) & 0x7);
5551 if ((sxfer & 0x1f) && idiv)
5552 tp->period = (((sxfer>>5)+4)*div_10M[idiv-1])/np->clock_khz;
5554 tp->period = 0xffff;
5556 /* Stop there if sync parameters are unchanged */
5557 if (tp->sval == sxfer && tp->wval == scntl3)
5562 if (sxfer & 0x01f) {
5563 /* Disable extended Sreq/Sack filtering */
5564 if (tp->period <= 2000)
5565 OUTOFFB(nc_stest2, EXT);
5568 spi_display_xfer_agreement(tp->starget);
5571 ** set actual value and sync_status
5572 ** patch ALL ccbs of this target.
5574 ncr_set_sync_wide_status(np, target);
5577 /*==========================================================
5579 ** Switch wide mode for current job and it's target
5580 ** SCSI specs say: a SCSI device that accepts a WDTR
5581 ** message shall reset the synchronous agreement to
5582 ** asynchronous mode.
5584 **==========================================================
5587 static void ncr_setwide (struct ncb *np, struct ccb *cp, u_char wide, u_char ack)
5589 struct scsi_cmnd *cmd = cp->cmd;
5590 u16 target = INB (nc_sdid) & 0x0f;
5595 BUG_ON(target != (scmd_id(cmd) & 0xf));
5597 tp = &np->target[target];
5598 tp->widedone = wide+1;
5599 scntl3 = (tp->wval & (~EWS)) | (wide ? EWS : 0);
5601 sxfer = ack ? 0 : tp->sval;
5604 ** Stop there if sync/wide parameters are unchanged
5606 if (tp->sval == sxfer && tp->wval == scntl3) return;
5611 ** Bells and whistles ;-)
5613 if (bootverbose >= 2) {
5614 dev_info(&cmd->device->sdev_target->dev, "WIDE SCSI %sabled.\n",
5615 (scntl3 & EWS) ? "en" : "dis");
5619 ** set actual value and sync_status
5620 ** patch ALL ccbs of this target.
5622 ncr_set_sync_wide_status(np, target);
5625 /*==========================================================
5627 ** Switch tagged mode for a target.
5629 **==========================================================
5632 static void ncr_setup_tags (struct ncb *np, struct scsi_device *sdev)
5634 unsigned char tn = sdev->id, ln = sdev->lun;
5635 struct tcb *tp = &np->target[tn];
5636 struct lcb *lp = tp->lp[ln];
5637 u_char reqtags, maxdepth;
5642 if ((!tp) || (!lp) || !sdev)
5646 ** If SCSI device queue depth is not yet set, leave here.
5648 if (!lp->scdev_depth)
5652 ** Donnot allow more tags than the SCSI driver can queue
5654 ** Donnot allow more tags than we can handle.
5656 maxdepth = lp->scdev_depth;
5657 if (maxdepth > lp->maxnxs) maxdepth = lp->maxnxs;
5658 if (lp->maxtags > maxdepth) lp->maxtags = maxdepth;
5659 if (lp->numtags > maxdepth) lp->numtags = maxdepth;
5662 ** only devices conformant to ANSI Version >= 2
5663 ** only devices capable of tagged commands
5664 ** only if enabled by user ..
5666 if (sdev->tagged_supported && lp->numtags > 1) {
5667 reqtags = lp->numtags;
5673 ** Update max number of tags
5675 lp->numtags = reqtags;
5676 if (lp->numtags > lp->maxtags)
5677 lp->maxtags = lp->numtags;
5680 ** If we want to switch tag mode, we must wait
5681 ** for no CCB to be active.
5683 if (reqtags > 1 && lp->usetags) { /* Stay in tagged mode */
5684 if (lp->queuedepth == reqtags) /* Already announced */
5686 lp->queuedepth = reqtags;
5688 else if (reqtags <= 1 && !lp->usetags) { /* Stay in untagged mode */
5689 lp->queuedepth = reqtags;
5692 else { /* Want to switch tag mode */
5693 if (lp->busyccbs) /* If not yet safe, return */
5695 lp->queuedepth = reqtags;
5696 lp->usetags = reqtags > 1 ? 1 : 0;
5700 ** Patch the lun mini-script, according to tag mode.
5702 lp->jump_tag.l_paddr = lp->usetags?
5703 cpu_to_scr(NCB_SCRIPT_PHYS(np, resel_tag)) :
5704 cpu_to_scr(NCB_SCRIPT_PHYS(np, resel_notag));
5707 ** Announce change to user.
5711 dev_info(&sdev->sdev_gendev,
5712 "tagged command queue depth set to %d\n",
5715 dev_info(&sdev->sdev_gendev,
5716 "tagged command queueing disabled\n");
5721 /*==========================================================
5724 ** ncr timeout handler.
5727 **==========================================================
5729 ** Misused to keep the driver running when
5730 ** interrupts are not configured correctly.
5732 **----------------------------------------------------------
5735 static void ncr_timeout (struct ncb *np)
5737 u_long thistime = jiffies;
5740 ** If release process in progress, let's go
5741 ** Set the release stage from 1 to 2 to synchronize
5742 ** with the release process.
5745 if (np->release_stage) {
5746 if (np->release_stage == 1) np->release_stage = 2;
5750 np->timer.expires = jiffies + SCSI_NCR_TIMER_INTERVAL;
5751 add_timer(&np->timer);
5754 ** If we are resetting the ncr, wait for settle_time before
5755 ** clearing it. Then command processing will be resumed.
5757 if (np->settle_time) {
5758 if (np->settle_time <= thistime) {
5759 if (bootverbose > 1)
5760 printk("%s: command processing resumed\n", ncr_name(np));
5761 np->settle_time = 0;
5763 requeue_waiting_list(np);
5769 ** Since the generic scsi driver only allows us 0.5 second
5770 ** to perform abort of a command, we must look at ccbs about
5771 ** every 0.25 second.
5773 if (np->lasttime + 4*HZ < thistime) {
5775 ** block ncr interrupts
5777 np->lasttime = thistime;
5780 #ifdef SCSI_NCR_BROKEN_INTR
5781 if (INB(nc_istat) & (INTF|SIP|DIP)) {
5784 ** Process pending interrupts.
5786 if (DEBUG_FLAGS & DEBUG_TINY) printk ("{");
5788 if (DEBUG_FLAGS & DEBUG_TINY) printk ("}");
5790 #endif /* SCSI_NCR_BROKEN_INTR */
5793 /*==========================================================
5795 ** log message for real hard errors
5797 ** "ncr0 targ 0?: ERROR (ds:si) (so-si-sd) (sxfer/scntl3) @ name (dsp:dbc)."
5798 ** " reg: r0 r1 r2 r3 r4 r5 r6 ..... rf."
5800 ** exception register:
5805 ** so: control lines as driver by NCR.
5806 ** si: control lines as seen by NCR.
5807 ** sd: scsi data lines as seen by NCR.
5810 ** sxfer: (see the manual)
5811 ** scntl3: (see the manual)
5813 ** current script command:
5814 ** dsp: script address (relative to start of script).
5815 ** dbc: first word of script command.
5817 ** First 16 register of the chip:
5820 **==========================================================
5823 static void ncr_log_hard_error(struct ncb *np, u16 sist, u_char dstat)
5829 u_char *script_base;
5834 if (dsp > np->p_script && dsp <= np->p_script + sizeof(struct script)) {
5835 script_ofs = dsp - np->p_script;
5836 script_size = sizeof(struct script);
5837 script_base = (u_char *) np->script0;
5838 script_name = "script";
5840 else if (np->p_scripth < dsp &&
5841 dsp <= np->p_scripth + sizeof(struct scripth)) {
5842 script_ofs = dsp - np->p_scripth;
5843 script_size = sizeof(struct scripth);
5844 script_base = (u_char *) np->scripth0;
5845 script_name = "scripth";
5850 script_name = "mem";
5853 printk ("%s:%d: ERROR (%x:%x) (%x-%x-%x) (%x/%x) @ (%s %x:%08x).\n",
5854 ncr_name (np), (unsigned)INB (nc_sdid)&0x0f, dstat, sist,
5855 (unsigned)INB (nc_socl), (unsigned)INB (nc_sbcl), (unsigned)INB (nc_sbdl),
5856 (unsigned)INB (nc_sxfer),(unsigned)INB (nc_scntl3), script_name, script_ofs,
5857 (unsigned)INL (nc_dbc));
5859 if (((script_ofs & 3) == 0) &&
5860 (unsigned)script_ofs < script_size) {
5861 printk ("%s: script cmd = %08x\n", ncr_name(np),
5862 scr_to_cpu((int) *(ncrcmd *)(script_base + script_ofs)));
5865 printk ("%s: regdump:", ncr_name(np));
5867 printk (" %02x", (unsigned)INB_OFF(i));
5871 /*============================================================
5873 ** ncr chip exception handler.
5875 **============================================================
5877 ** In normal cases, interrupt conditions occur one at a
5878 ** time. The ncr is able to stack in some extra registers
5879 ** other interrupts that will occur after the first one.
5880 ** But, several interrupts may occur at the same time.
5882 ** We probably should only try to deal with the normal
5883 ** case, but it seems that multiple interrupts occur in
5884 ** some cases that are not abnormal at all.
5886 ** The most frequent interrupt condition is Phase Mismatch.
5887 ** We should want to service this interrupt quickly.
5888 ** A SCSI parity error may be delivered at the same time.
5889 ** The SIR interrupt is not very frequent in this driver,
5890 ** since the INTFLY is likely used for command completion
5892 ** The Selection Timeout interrupt may be triggered with
5894 ** The SBMC interrupt (SCSI Bus Mode Change) may probably
5895 ** occur at any time.
5897 ** This handler try to deal as cleverly as possible with all
5900 **============================================================
5903 void ncr_exception (struct ncb *np)
5905 u_char istat, dstat;
5910 ** interrupt on the fly ?
5911 ** Since the global header may be copied back to a CCB
5912 ** using a posted PCI memory write, the last operation on
5913 ** the istat register is a READ in order to flush posted
5914 ** PCI write commands.
5916 istat = INB (nc_istat);
5918 OUTB (nc_istat, (istat & SIGP) | INTF);
5919 istat = INB (nc_istat);
5920 if (DEBUG_FLAGS & DEBUG_TINY) printk ("F ");
5921 ncr_wakeup_done (np);
5924 if (!(istat & (SIP|DIP)))
5928 OUTB (nc_istat, CABRT);
5931 ** Steinbach's Guideline for Systems Programming:
5932 ** Never test for an error condition you don't know how to handle.
5935 sist = (istat & SIP) ? INW (nc_sist) : 0;
5936 dstat = (istat & DIP) ? INB (nc_dstat) : 0;
5938 if (DEBUG_FLAGS & DEBUG_TINY)
5939 printk ("<%d|%x:%x|%x:%x>",
5942 (unsigned)INL(nc_dsp),
5943 (unsigned)INL(nc_dbc));
5945 /*========================================================
5946 ** First, interrupts we want to service cleanly.
5948 ** Phase mismatch is the most frequent interrupt, and
5949 ** so we have to service it as quickly and as cleanly
5951 ** Programmed interrupts are rarely used in this driver,
5952 ** but we must handle them cleanly anyway.
5953 ** We try to deal with PAR and SBMC combined with
5954 ** some other interrupt(s).
5955 **=========================================================
5958 if (!(sist & (STO|GEN|HTH|SGE|UDC|RST)) &&
5959 !(dstat & (MDPE|BF|ABRT|IID))) {
5960 if ((sist & SBMC) && ncr_int_sbmc (np))
5962 if ((sist & PAR) && ncr_int_par (np))
5973 ** DEL 397 - 53C875 Rev 3 - Part Number 609-0392410 - ITEM 2.
5975 if (!(sist & (SBMC|PAR)) && !(dstat & SSI)) {
5976 printk( "%s: unknown interrupt(s) ignored, "
5977 "ISTAT=%x DSTAT=%x SIST=%x\n",
5978 ncr_name(np), istat, dstat, sist);
5985 /*========================================================
5986 ** Now, interrupts that need some fixing up.
5987 ** Order and multiple interrupts is so less important.
5989 ** If SRST has been asserted, we just reset the chip.
5991 ** Selection is intirely handled by the chip. If the
5992 ** chip says STO, we trust it. Seems some other
5993 ** interrupts may occur at the same time (UDC, IID), so
5994 ** we ignore them. In any case we do enough fix-up
5995 ** in the service routine.
5996 ** We just exclude some fatal dma errors.
5997 **=========================================================
6001 ncr_init (np, 1, bootverbose ? "scsi reset" : NULL, HS_RESET);
6006 !(dstat & (MDPE|BF|ABRT))) {
6008 ** DEL 397 - 53C875 Rev 3 - Part Number 609-0392410 - ITEM 1.
6010 OUTONB (nc_ctest3, CLF);
6016 /*=========================================================
6017 ** Now, interrupts we are not able to recover cleanly.
6018 ** (At least for the moment).
6020 ** Do the register dump.
6021 ** Log message for real hard errors.
6023 ** For MDPE, BF, ABORT, IID, SGE and HTH we reset the
6024 ** BUS and the chip.
6025 ** We are more soft for UDC.
6026 **=========================================================
6029 if (time_after(jiffies, np->regtime)) {
6030 np->regtime = jiffies + 10*HZ;
6031 for (i = 0; i<sizeof(np->regdump); i++)
6032 ((char*)&np->regdump)[i] = INB_OFF(i);
6033 np->regdump.nc_dstat = dstat;
6034 np->regdump.nc_sist = sist;
6037 ncr_log_hard_error(np, sist, dstat);
6039 printk ("%s: have to clear fifos.\n", ncr_name (np));
6040 OUTB (nc_stest3, TE|CSF);
6041 OUTONB (nc_ctest3, CLF);
6043 if ((sist & (SGE)) ||
6044 (dstat & (MDPE|BF|ABRT|IID))) {
6045 ncr_start_reset(np);
6050 printk ("%s: handshake timeout\n", ncr_name(np));
6051 ncr_start_reset(np);
6056 printk ("%s: unexpected disconnect\n", ncr_name(np));
6057 OUTB (HS_PRT, HS_UNEXPECTED);
6058 OUTL_DSP (NCB_SCRIPT_PHYS (np, cleanup));
6062 /*=========================================================
6063 ** We just miss the cause of the interrupt. :(
6064 ** Print a message. The timeout will do the real work.
6065 **=========================================================
6067 printk ("%s: unknown interrupt\n", ncr_name(np));
6070 /*==========================================================
6072 ** ncr chip exception handler for selection timeout
6074 **==========================================================
6076 ** There seems to be a bug in the 53c810.
6077 ** Although a STO-Interrupt is pending,
6078 ** it continues executing script commands.
6079 ** But it will fail and interrupt (IID) on
6080 ** the next instruction where it's looking
6081 ** for a valid phase.
6083 **----------------------------------------------------------
6086 void ncr_int_sto (struct ncb *np)
6090 if (DEBUG_FLAGS & DEBUG_TINY) printk ("T");
6093 ** look for ccb and set the status.
6098 while (cp && (CCB_PHYS (cp, phys) != dsa))
6102 cp-> host_status = HS_SEL_TIMEOUT;
6103 ncr_complete (np, cp);
6107 ** repair start queue and jump to start point.
6110 OUTL_DSP (NCB_SCRIPTH_PHYS (np, sto_restart));
6114 /*==========================================================
6116 ** ncr chip exception handler for SCSI bus mode change
6118 **==========================================================
6120 ** spi2-r12 11.2.3 says a transceiver mode change must
6121 ** generate a reset event and a device that detects a reset
6122 ** event shall initiate a hard reset. It says also that a
6123 ** device that detects a mode change shall set data transfer
6124 ** mode to eight bit asynchronous, etc...
6125 ** So, just resetting should be enough.
6128 **----------------------------------------------------------
6131 static int ncr_int_sbmc (struct ncb *np)
6133 u_char scsi_mode = INB (nc_stest4) & SMODE;
6135 if (scsi_mode != np->scsi_mode) {
6136 printk("%s: SCSI bus mode change from %x to %x.\n",
6137 ncr_name(np), np->scsi_mode, scsi_mode);
6139 np->scsi_mode = scsi_mode;
6143 ** Suspend command processing for 1 second and
6144 ** reinitialize all except the chip.
6146 np->settle_time = jiffies + HZ;
6147 ncr_init (np, 0, bootverbose ? "scsi mode change" : NULL, HS_RESET);
6153 /*==========================================================
6155 ** ncr chip exception handler for SCSI parity error.
6157 **==========================================================
6160 **----------------------------------------------------------
6163 static int ncr_int_par (struct ncb *np)
6165 u_char hsts = INB (HS_PRT);
6166 u32 dbc = INL (nc_dbc);
6167 u_char sstat1 = INB (nc_sstat1);
6172 printk("%s: SCSI parity error detected: SCR1=%d DBC=%x SSTAT1=%x\n",
6173 ncr_name(np), hsts, dbc, sstat1);
6176 * Ignore the interrupt if the NCR is not connected
6177 * to the SCSI bus, since the right work should have
6178 * been done on unexpected disconnection handling.
6180 if (!(INB (nc_scntl1) & ISCON))
6184 * If the nexus is not clearly identified, reset the bus.
6185 * We will try to do better later.
6187 if (hsts & HS_INVALMASK)
6191 * If the SCSI parity error occurs in MSG IN phase, prepare a
6192 * MSG PARITY message. Otherwise, prepare a INITIATOR DETECTED
6193 * ERROR message and let the device decide to retry the command
6194 * or to terminate with check condition. If we were in MSG IN
6195 * phase waiting for the response of a negotiation, we will
6196 * get SIR_NEGO_FAILED at dispatch.
6198 if (!(dbc & 0xc0000000))
6199 phase = (dbc >> 24) & 7;
6201 msg = MSG_PARITY_ERROR;
6203 msg = INITIATOR_ERROR;
6207 * If the NCR stopped on a MOVE ^ DATA_IN, we jump to a
6208 * script that will ignore all data in bytes until phase
6209 * change, since we are not sure the chip will wait the phase
6210 * change prior to delivering the interrupt.
6213 jmp = NCB_SCRIPTH_PHYS (np, par_err_data_in);
6215 jmp = NCB_SCRIPTH_PHYS (np, par_err_other);
6217 OUTONB (nc_ctest3, CLF ); /* clear dma fifo */
6218 OUTB (nc_stest3, TE|CSF); /* clear scsi fifo */
6220 np->msgout[0] = msg;
6225 ncr_start_reset(np);
6229 /*==========================================================
6232 ** ncr chip exception handler for phase errors.
6235 **==========================================================
6237 ** We have to construct a new transfer descriptor,
6238 ** to transfer the rest of the current block.
6240 **----------------------------------------------------------
6243 static void ncr_int_ma (struct ncb *np)
6260 sbcl = INB (nc_sbcl);
6263 rest = dbc & 0xffffff;
6266 ** Take into account dma fifo and various buffers and latches,
6267 ** only if the interrupted phase is an OUTPUT phase.
6270 if ((cmd & 1) == 0) {
6271 u_char ctest5, ss0, ss2;
6274 ctest5 = (np->rv_ctest5 & DFS) ? INB (nc_ctest5) : 0;
6276 delta=(((ctest5 << 8) | (INB (nc_dfifo) & 0xff)) - rest) & 0x3ff;
6278 delta=(INB (nc_dfifo) - rest) & 0x7f;
6281 ** The data in the dma fifo has not been transferred to
6282 ** the target -> add the amount to the rest
6283 ** and clear the data.
6284 ** Check the sstat2 register in case of wide transfer.
6288 ss0 = INB (nc_sstat0);
6289 if (ss0 & OLF) rest++;
6290 if (ss0 & ORF) rest++;
6291 if (INB(nc_scntl3) & EWS) {
6292 ss2 = INB (nc_sstat2);
6293 if (ss2 & OLF1) rest++;
6294 if (ss2 & ORF1) rest++;
6297 if (DEBUG_FLAGS & (DEBUG_TINY|DEBUG_PHASE))
6298 printk ("P%x%x RL=%d D=%d SS0=%x ", cmd&7, sbcl&7,
6299 (unsigned) rest, (unsigned) delta, ss0);
6302 if (DEBUG_FLAGS & (DEBUG_TINY|DEBUG_PHASE))
6303 printk ("P%x%x RL=%d ", cmd&7, sbcl&7, rest);
6309 OUTONB (nc_ctest3, CLF ); /* clear dma fifo */
6310 OUTB (nc_stest3, TE|CSF); /* clear scsi fifo */
6313 ** locate matching cp.
6314 ** if the interrupted phase is DATA IN or DATA OUT,
6315 ** trust the global header.
6320 if (CCB_PHYS(cp, phys) != dsa)
6324 while (cp && (CCB_PHYS (cp, phys) != dsa))
6329 ** try to find the interrupted script command,
6330 ** and the address at which to continue.
6334 if (dsp > np->p_script &&
6335 dsp <= np->p_script + sizeof(struct script)) {
6336 vdsp = (u32 *)((char*)np->script0 + (dsp-np->p_script-8));
6339 else if (dsp > np->p_scripth &&
6340 dsp <= np->p_scripth + sizeof(struct scripth)) {
6341 vdsp = (u32 *)((char*)np->scripth0 + (dsp-np->p_scripth-8));
6345 if (dsp == CCB_PHYS (cp, patch[2])) {
6346 vdsp = &cp->patch[0];
6347 nxtdsp = scr_to_cpu(vdsp[3]);
6349 else if (dsp == CCB_PHYS (cp, patch[6])) {
6350 vdsp = &cp->patch[4];
6351 nxtdsp = scr_to_cpu(vdsp[3]);
6356 ** log the information
6359 if (DEBUG_FLAGS & DEBUG_PHASE) {
6360 printk ("\nCP=%p CP2=%p DSP=%x NXT=%x VDSP=%p CMD=%x ",
6363 (unsigned)nxtdsp, vdsp, cmd);
6367 ** cp=0 means that the DSA does not point to a valid control
6368 ** block. This should not happen since we donnot use multi-byte
6369 ** move while we are being reselected ot after command complete.
6370 ** We are not able to recover from such a phase error.
6373 printk ("%s: SCSI phase error fixup: "
6374 "CCB already dequeued (0x%08lx)\n",
6375 ncr_name (np), (u_long) np->header.cp);
6380 ** get old startaddress and old length.
6383 oadr = scr_to_cpu(vdsp[1]);
6385 if (cmd & 0x10) { /* Table indirect */
6386 tblp = (u32 *) ((char*) &cp->phys + oadr);
6387 olen = scr_to_cpu(tblp[0]);
6388 oadr = scr_to_cpu(tblp[1]);
6391 olen = scr_to_cpu(vdsp[0]) & 0xffffff;
6394 if (DEBUG_FLAGS & DEBUG_PHASE) {
6395 printk ("OCMD=%x\nTBLP=%p OLEN=%x OADR=%x\n",
6396 (unsigned) (scr_to_cpu(vdsp[0]) >> 24),
6403 ** check cmd against assumed interrupted script command.
6406 if (cmd != (scr_to_cpu(vdsp[0]) >> 24)) {
6407 PRINT_ADDR(cp->cmd, "internal error: cmd=%02x != %02x=(vdsp[0] "
6408 ">> 24)\n", cmd, scr_to_cpu(vdsp[0]) >> 24);
6414 ** cp != np->header.cp means that the header of the CCB
6415 ** currently being processed has not yet been copied to
6416 ** the global header area. That may happen if the device did
6417 ** not accept all our messages after having been selected.
6419 if (cp != np->header.cp) {
6420 printk ("%s: SCSI phase error fixup: "
6421 "CCB address mismatch (0x%08lx != 0x%08lx)\n",
6422 ncr_name (np), (u_long) cp, (u_long) np->header.cp);
6426 ** if old phase not dataphase, leave here.
6430 PRINT_ADDR(cp->cmd, "phase change %x-%x %d@%08x resid=%d.\n",
6431 cmd&7, sbcl&7, (unsigned)olen,
6432 (unsigned)oadr, (unsigned)rest);
6433 goto unexpected_phase;
6437 ** choose the correct patch area.
6438 ** if savep points to one, choose the other.
6442 newtmp = CCB_PHYS (cp, patch);
6443 if (newtmp == scr_to_cpu(cp->phys.header.savep)) {
6444 newcmd = &cp->patch[4];
6445 newtmp = CCB_PHYS (cp, patch[4]);
6449 ** fillin the commands
6452 newcmd[0] = cpu_to_scr(((cmd & 0x0f) << 24) | rest);
6453 newcmd[1] = cpu_to_scr(oadr + olen - rest);
6454 newcmd[2] = cpu_to_scr(SCR_JUMP);
6455 newcmd[3] = cpu_to_scr(nxtdsp);
6457 if (DEBUG_FLAGS & DEBUG_PHASE) {
6458 PRINT_ADDR(cp->cmd, "newcmd[%d] %x %x %x %x.\n",
6459 (int) (newcmd - cp->patch),
6460 (unsigned)scr_to_cpu(newcmd[0]),
6461 (unsigned)scr_to_cpu(newcmd[1]),
6462 (unsigned)scr_to_cpu(newcmd[2]),
6463 (unsigned)scr_to_cpu(newcmd[3]));
6466 ** fake the return address (to the patch).
6467 ** and restart script processor at dispatcher.
6469 OUTL (nc_temp, newtmp);
6470 OUTL_DSP (NCB_SCRIPT_PHYS (np, dispatch));
6474 ** Unexpected phase changes that occurs when the current phase
6475 ** is not a DATA IN or DATA OUT phase are due to error conditions.
6476 ** Such event may only happen when the SCRIPTS is using a
6477 ** multibyte SCSI MOVE.
6479 ** Phase change Some possible cause
6481 ** COMMAND --> MSG IN SCSI parity error detected by target.
6482 ** COMMAND --> STATUS Bad command or refused by target.
6483 ** MSG OUT --> MSG IN Message rejected by target.
6484 ** MSG OUT --> COMMAND Bogus target that discards extended
6485 ** negotiation messages.
6487 ** The code below does not care of the new phase and so
6488 ** trusts the target. Why to annoy it ?
6489 ** If the interrupted phase is COMMAND phase, we restart at
6491 ** If a target does not get all the messages after selection,
6492 ** the code assumes blindly that the target discards extended
6493 ** messages and clears the negotiation status.
6494 ** If the target does not want all our response to negotiation,
6495 ** we force a SIR_NEGO_PROTO interrupt (it is a hack that avoids
6496 ** bloat for such a should_not_happen situation).
6497 ** In all other situation, we reset the BUS.
6498 ** Are these assumptions reasonable ? (Wait and see ...)
6505 case 2: /* COMMAND phase */
6506 nxtdsp = NCB_SCRIPT_PHYS (np, dispatch);
6509 case 3: /* STATUS phase */
6510 nxtdsp = NCB_SCRIPT_PHYS (np, dispatch);
6513 case 6: /* MSG OUT phase */
6514 np->scripth->nxtdsp_go_on[0] = cpu_to_scr(dsp + 8);
6515 if (dsp == NCB_SCRIPT_PHYS (np, send_ident)) {
6516 cp->host_status = HS_BUSY;
6517 nxtdsp = NCB_SCRIPTH_PHYS (np, clratn_go_on);
6519 else if (dsp == NCB_SCRIPTH_PHYS (np, send_wdtr) ||
6520 dsp == NCB_SCRIPTH_PHYS (np, send_sdtr)) {
6521 nxtdsp = NCB_SCRIPTH_PHYS (np, nego_bad_phase);
6525 case 7: /* MSG IN phase */
6526 nxtdsp = NCB_SCRIPT_PHYS (np, clrack);
6537 ncr_start_reset(np);
6541 static void ncr_sir_to_redo(struct ncb *np, int num, struct ccb *cp)
6543 struct scsi_cmnd *cmd = cp->cmd;
6544 struct tcb *tp = &np->target[cmd->device->id];
6545 struct lcb *lp = tp->lp[cmd->device->lun];
6546 struct list_head *qp;
6551 u_char s_status = INB (SS_PRT);
6554 ** Let the SCRIPTS processor skip all not yet started CCBs,
6555 ** and count disconnected CCBs. Since the busy queue is in
6556 ** the same order as the chip start queue, disconnected CCBs
6557 ** are before cp and busy ones after.
6560 qp = lp->busy_ccbq.prev;
6561 while (qp != &lp->busy_ccbq) {
6562 cp2 = list_entry(qp, struct ccb, link_ccbq);
6567 cp2->start.schedule.l_paddr =
6568 cpu_to_scr(NCB_SCRIPTH_PHYS (np, skip));
6570 lp->held_ccb = cp; /* Requeue when this one completes */
6571 disc_cnt = lp->queuedccbs - busy_cnt;
6575 default: /* Just for safety, should never happen */
6576 case SAM_STAT_TASK_SET_FULL:
6578 ** Decrease number of tags to the number of
6579 ** disconnected commands.
6583 if (bootverbose >= 1) {
6584 PRINT_ADDR(cmd, "QUEUE FULL! %d busy, %d disconnected "
6585 "CCBs\n", busy_cnt, disc_cnt);
6587 if (disc_cnt < lp->numtags) {
6588 lp->numtags = disc_cnt > 2 ? disc_cnt : 2;
6590 ncr_setup_tags (np, cmd->device);
6593 ** Requeue the command to the start queue.
6594 ** If any disconnected commands,
6596 ** Jump to reselect.
6598 cp->phys.header.savep = cp->startp;
6599 cp->host_status = HS_BUSY;
6600 cp->scsi_status = SAM_STAT_ILLEGAL;
6602 ncr_put_start_queue(np, cp);
6604 INB (nc_ctest2); /* Clear SIGP */
6605 OUTL_DSP (NCB_SCRIPT_PHYS (np, reselect));
6607 case SAM_STAT_COMMAND_TERMINATED:
6608 case SAM_STAT_CHECK_CONDITION:
6610 ** If we were requesting sense, give up.
6616 ** Device returned CHECK CONDITION status.
6617 ** Prepare all needed data strutures for getting
6622 cp->scsi_smsg2[0] = IDENTIFY(0, cmd->device->lun);
6623 cp->phys.smsg.addr = cpu_to_scr(CCB_PHYS (cp, scsi_smsg2));
6624 cp->phys.smsg.size = cpu_to_scr(1);
6629 cp->phys.cmd.addr = cpu_to_scr(CCB_PHYS (cp, sensecmd));
6630 cp->phys.cmd.size = cpu_to_scr(6);
6633 ** patch requested size into sense command
6635 cp->sensecmd[0] = 0x03;
6636 cp->sensecmd[1] = (cmd->device->lun & 0x7) << 5;
6637 cp->sensecmd[4] = sizeof(cp->sense_buf);
6642 memset(cp->sense_buf, 0, sizeof(cp->sense_buf));
6643 cp->phys.sense.addr = cpu_to_scr(CCB_PHYS(cp,sense_buf[0]));
6644 cp->phys.sense.size = cpu_to_scr(sizeof(cp->sense_buf));
6647 ** requeue the command.
6649 startp = cpu_to_scr(NCB_SCRIPTH_PHYS (np, sdata_in));
6651 cp->phys.header.savep = startp;
6652 cp->phys.header.goalp = startp + 24;
6653 cp->phys.header.lastp = startp;
6654 cp->phys.header.wgoalp = startp + 24;
6655 cp->phys.header.wlastp = startp;
6657 cp->host_status = HS_BUSY;
6658 cp->scsi_status = SAM_STAT_ILLEGAL;
6659 cp->auto_sense = s_status;
6661 cp->start.schedule.l_paddr =
6662 cpu_to_scr(NCB_SCRIPT_PHYS (np, select));
6665 ** Select without ATN for quirky devices.
6667 if (cmd->device->select_no_atn)
6668 cp->start.schedule.l_paddr =
6669 cpu_to_scr(NCB_SCRIPTH_PHYS (np, select_no_atn));
6671 ncr_put_start_queue(np, cp);
6673 OUTL_DSP (NCB_SCRIPT_PHYS (np, start));
6683 /*==========================================================
6686 ** ncr chip exception handler for programmed interrupts.
6689 **==========================================================
6692 void ncr_int_sir (struct ncb *np)
6695 u_char chg, ofs, per, fak, wide;
6696 u_char num = INB (nc_dsps);
6697 struct ccb *cp=NULL;
6698 u_long dsa = INL (nc_dsa);
6699 u_char target = INB (nc_sdid) & 0x0f;
6700 struct tcb *tp = &np->target[target];
6701 struct scsi_target *starget = tp->starget;
6703 if (DEBUG_FLAGS & DEBUG_TINY) printk ("I#%d", num);
6708 ** This is used for HP Zalon/53c720 where INTFLY
6709 ** operation is currently broken.
6711 ncr_wakeup_done(np);
6712 #ifdef SCSI_NCR_CCB_DONE_SUPPORT
6713 OUTL(nc_dsp, NCB_SCRIPT_PHYS (np, done_end) + 8);
6715 OUTL(nc_dsp, NCB_SCRIPT_PHYS (np, start));
6718 case SIR_RESEL_NO_MSG_IN:
6719 case SIR_RESEL_NO_IDENTIFY:
6721 ** If devices reselecting without sending an IDENTIFY
6722 ** message still exist, this should help.
6723 ** We just assume lun=0, 1 CCB, no tag.
6726 OUTL_DSP (scr_to_cpu(tp->lp[0]->jump_ccb[0]));
6730 case SIR_RESEL_BAD_TARGET: /* Will send a TARGET RESET message */
6731 case SIR_RESEL_BAD_LUN: /* Will send a TARGET RESET message */
6732 case SIR_RESEL_BAD_I_T_L_Q: /* Will send an ABORT TAG message */
6733 case SIR_RESEL_BAD_I_T_L: /* Will send an ABORT message */
6734 printk ("%s:%d: SIR %d, "
6735 "incorrect nexus identification on reselection\n",
6736 ncr_name (np), target, num);
6738 case SIR_DONE_OVERFLOW:
6739 printk ("%s:%d: SIR %d, "
6740 "CCB done queue overflow\n",
6741 ncr_name (np), target, num);
6743 case SIR_BAD_STATUS:
6745 if (!cp || CCB_PHYS (cp, phys) != dsa)
6747 ncr_sir_to_redo(np, num, cp);
6754 while (cp && (CCB_PHYS (cp, phys) != dsa))
6758 BUG_ON(cp != np->header.cp);
6760 if (!cp || cp != np->header.cp)
6765 /*-----------------------------------------------------------------------------
6767 ** Was Sie schon immer ueber transfermode negotiation wissen wollten ...
6768 ** ("Everything you've always wanted to know about transfer mode
6771 ** We try to negotiate sync and wide transfer only after
6772 ** a successful inquire command. We look at byte 7 of the
6773 ** inquire data to determine the capabilities of the target.
6775 ** When we try to negotiate, we append the negotiation message
6776 ** to the identify and (maybe) simple tag message.
6777 ** The host status field is set to HS_NEGOTIATE to mark this
6780 ** If the target doesn't answer this message immediately
6781 ** (as required by the standard), the SIR_NEGO_FAIL interrupt
6782 ** will be raised eventually.
6783 ** The handler removes the HS_NEGOTIATE status, and sets the
6784 ** negotiated value to the default (async / nowide).
6786 ** If we receive a matching answer immediately, we check it
6787 ** for validity, and set the values.
6789 ** If we receive a Reject message immediately, we assume the
6790 ** negotiation has failed, and fall back to standard values.
6792 ** If we receive a negotiation message while not in HS_NEGOTIATE
6793 ** state, it's a target initiated negotiation. We prepare a
6794 ** (hopefully) valid answer, set our parameters, and send back
6795 ** this answer to the target.
6797 ** If the target doesn't fetch the answer (no message out phase),
6798 ** we assume the negotiation has failed, and fall back to default
6801 ** When we set the values, we adjust them in all ccbs belonging
6802 ** to this target, in the controller's register, and in the "phys"
6803 ** field of the controller's struct ncb.
6805 ** Possible cases: hs sir msg_in value send goto
6806 ** We try to negotiate:
6807 ** -> target doesn't msgin NEG FAIL noop defa. - dispatch
6808 ** -> target rejected our msg NEG FAIL reject defa. - dispatch
6809 ** -> target answered (ok) NEG SYNC sdtr set - clrack
6810 ** -> target answered (!ok) NEG SYNC sdtr defa. REJ--->msg_bad
6811 ** -> target answered (ok) NEG WIDE wdtr set - clrack
6812 ** -> target answered (!ok) NEG WIDE wdtr defa. REJ--->msg_bad
6813 ** -> any other msgin NEG FAIL noop defa. - dispatch
6815 ** Target tries to negotiate:
6816 ** -> incoming message --- SYNC sdtr set SDTR -
6817 ** -> incoming message --- WIDE wdtr set WDTR -
6818 ** We sent our answer:
6819 ** -> target doesn't msgout --- PROTO ? defa. - dispatch
6821 **-----------------------------------------------------------------------------
6824 case SIR_NEGO_FAILED:
6825 /*-------------------------------------------------------
6827 ** Negotiation failed.
6828 ** Target doesn't send an answer message,
6829 ** or target rejected our message.
6831 ** Remove negotiation request.
6833 **-------------------------------------------------------
6835 OUTB (HS_PRT, HS_BUSY);
6839 case SIR_NEGO_PROTO:
6840 /*-------------------------------------------------------
6842 ** Negotiation failed.
6843 ** Target doesn't fetch the answer message.
6845 **-------------------------------------------------------
6848 if (DEBUG_FLAGS & DEBUG_NEGO) {
6849 PRINT_ADDR(cp->cmd, "negotiation failed sir=%x "
6850 "status=%x.\n", num, cp->nego_status);
6854 ** any error in negotiation:
6855 ** fall back to default mode.
6857 switch (cp->nego_status) {
6860 spi_period(starget) = 0;
6861 spi_offset(starget) = 0;
6862 ncr_setsync (np, cp, 0, 0xe0);
6866 spi_width(starget) = 0;
6867 ncr_setwide (np, cp, 0, 0);
6871 np->msgin [0] = NOP;
6872 np->msgout[0] = NOP;
6873 cp->nego_status = 0;
6877 if (DEBUG_FLAGS & DEBUG_NEGO) {
6878 ncr_print_msg(cp, "sync msgin", np->msgin);
6884 if (ofs==0) per=255;
6887 ** if target sends SDTR message,
6888 ** it CAN transfer synch.
6892 spi_support_sync(starget) = 1;
6895 ** check values against driver limits.
6898 if (per < np->minsync)
6899 {chg = 1; per = np->minsync;}
6900 if (per < tp->minsync)
6901 {chg = 1; per = tp->minsync;}
6902 if (ofs > tp->maxoffs)
6903 {chg = 1; ofs = tp->maxoffs;}
6906 ** Check against controller limits.
6911 ncr_getsync(np, per, &fak, &scntl3);
6924 if (DEBUG_FLAGS & DEBUG_NEGO) {
6925 PRINT_ADDR(cp->cmd, "sync: per=%d scntl3=0x%x ofs=%d "
6926 "fak=%d chg=%d.\n", per, scntl3, ofs, fak, chg);
6929 if (INB (HS_PRT) == HS_NEGOTIATE) {
6930 OUTB (HS_PRT, HS_BUSY);
6931 switch (cp->nego_status) {
6934 /* This was an answer message */
6936 /* Answer wasn't acceptable. */
6937 spi_period(starget) = 0;
6938 spi_offset(starget) = 0;
6939 ncr_setsync(np, cp, 0, 0xe0);
6940 OUTL_DSP(NCB_SCRIPT_PHYS (np, msg_bad));
6943 spi_period(starget) = per;
6944 spi_offset(starget) = ofs;
6945 ncr_setsync(np, cp, scntl3, (fak<<5)|ofs);
6946 OUTL_DSP(NCB_SCRIPT_PHYS (np, clrack));
6951 spi_width(starget) = 0;
6952 ncr_setwide(np, cp, 0, 0);
6958 ** It was a request. Set value and
6959 ** prepare an answer message
6962 spi_period(starget) = per;
6963 spi_offset(starget) = ofs;
6964 ncr_setsync(np, cp, scntl3, (fak<<5)|ofs);
6966 spi_populate_sync_msg(np->msgout, per, ofs);
6967 cp->nego_status = NS_SYNC;
6969 if (DEBUG_FLAGS & DEBUG_NEGO) {
6970 ncr_print_msg(cp, "sync msgout", np->msgout);
6974 OUTL_DSP (NCB_SCRIPT_PHYS (np, msg_bad));
6977 np->msgin [0] = NOP;
6983 ** Wide request message received.
6985 if (DEBUG_FLAGS & DEBUG_NEGO) {
6986 ncr_print_msg(cp, "wide msgin", np->msgin);
6990 ** get requested values.
6994 wide = np->msgin[3];
6997 ** if target sends WDTR message,
6998 ** it CAN transfer wide.
7001 if (wide && starget)
7002 spi_support_wide(starget) = 1;
7005 ** check values against driver limits.
7008 if (wide > tp->usrwide)
7009 {chg = 1; wide = tp->usrwide;}
7011 if (DEBUG_FLAGS & DEBUG_NEGO) {
7012 PRINT_ADDR(cp->cmd, "wide: wide=%d chg=%d.\n", wide,
7016 if (INB (HS_PRT) == HS_NEGOTIATE) {
7017 OUTB (HS_PRT, HS_BUSY);
7018 switch (cp->nego_status) {
7022 ** This was an answer message
7025 /* Answer wasn't acceptable. */
7026 spi_width(starget) = 0;
7027 ncr_setwide(np, cp, 0, 1);
7028 OUTL_DSP (NCB_SCRIPT_PHYS (np, msg_bad));
7031 spi_width(starget) = wide;
7032 ncr_setwide(np, cp, wide, 1);
7033 OUTL_DSP (NCB_SCRIPT_PHYS (np, clrack));
7038 spi_period(starget) = 0;
7039 spi_offset(starget) = 0;
7040 ncr_setsync(np, cp, 0, 0xe0);
7046 ** It was a request, set value and
7047 ** prepare an answer message
7050 spi_width(starget) = wide;
7051 ncr_setwide(np, cp, wide, 1);
7052 spi_populate_width_msg(np->msgout, wide);
7054 np->msgin [0] = NOP;
7056 cp->nego_status = NS_WIDE;
7058 if (DEBUG_FLAGS & DEBUG_NEGO) {
7059 ncr_print_msg(cp, "wide msgout", np->msgin);
7063 /*--------------------------------------------------------------------
7065 ** Processing of special messages
7067 **--------------------------------------------------------------------
7070 case SIR_REJECT_RECEIVED:
7071 /*-----------------------------------------------
7073 ** We received a MESSAGE_REJECT.
7075 **-----------------------------------------------
7078 PRINT_ADDR(cp->cmd, "MESSAGE_REJECT received (%x:%x).\n",
7079 (unsigned)scr_to_cpu(np->lastmsg), np->msgout[0]);
7082 case SIR_REJECT_SENT:
7083 /*-----------------------------------------------
7085 ** We received an unknown message
7087 **-----------------------------------------------
7090 ncr_print_msg(cp, "MESSAGE_REJECT sent for", np->msgin);
7093 /*--------------------------------------------------------------------
7095 ** Processing of special messages
7097 **--------------------------------------------------------------------
7100 case SIR_IGN_RESIDUE:
7101 /*-----------------------------------------------
7103 ** We received an IGNORE RESIDUE message,
7104 ** which couldn't be handled by the script.
7106 **-----------------------------------------------
7109 PRINT_ADDR(cp->cmd, "IGNORE_WIDE_RESIDUE received, but not yet "
7113 case SIR_MISSING_SAVE:
7114 /*-----------------------------------------------
7116 ** We received an DISCONNECT message,
7117 ** but the datapointer wasn't saved before.
7119 **-----------------------------------------------
7122 PRINT_ADDR(cp->cmd, "DISCONNECT received, but datapointer "
7123 "not saved: data=%x save=%x goal=%x.\n",
7124 (unsigned) INL (nc_temp),
7125 (unsigned) scr_to_cpu(np->header.savep),
7126 (unsigned) scr_to_cpu(np->header.goalp));
7135 /*==========================================================
7138 ** Acquire a control block
7141 **==========================================================
7144 static struct ccb *ncr_get_ccb(struct ncb *np, struct scsi_cmnd *cmd)
7146 u_char tn = cmd->device->id;
7147 u_char ln = cmd->device->lun;
7148 struct tcb *tp = &np->target[tn];
7149 struct lcb *lp = tp->lp[ln];
7150 u_char tag = NO_TAG;
7151 struct ccb *cp = NULL;
7154 ** Lun structure available ?
7157 struct list_head *qp;
7159 ** Keep from using more tags than we can handle.
7161 if (lp->usetags && lp->busyccbs >= lp->maxnxs)
7165 ** Allocate a new CCB if needed.
7167 if (list_empty(&lp->free_ccbq))
7168 ncr_alloc_ccb(np, tn, ln);
7171 ** Look for free CCB
7173 qp = ncr_list_pop(&lp->free_ccbq);
7175 cp = list_entry(qp, struct ccb, link_ccbq);
7177 PRINT_ADDR(cmd, "ccb free list corrupted "
7181 list_add_tail(qp, &lp->wait_ccbq);
7187 ** If a CCB is available,
7188 ** Get a tag for this nexus if required.
7192 tag = lp->cb_tags[lp->ia_tag];
7194 else if (lp->actccbs > 0)
7199 ** if nothing available, take the default.
7205 ** Wait until available.
7209 if (flags & SCSI_NOSLEEP) break;
7210 if (tsleep ((caddr_t)cp, PRIBIO|PCATCH, "ncr", 0))
7221 ** Move to next available tag if tag used.
7224 if (tag != NO_TAG) {
7226 if (lp->ia_tag == MAX_TAGS)
7228 lp->tags_umap |= (((tagmap_t) 1) << tag);
7233 ** Remember all informations needed to free this CCB.
7239 if (DEBUG_FLAGS & DEBUG_TAGS) {
7240 PRINT_ADDR(cmd, "ccb @%p using tag %d.\n", cp, tag);
7246 /*==========================================================
7249 ** Release one control block
7252 **==========================================================
7255 static void ncr_free_ccb (struct ncb *np, struct ccb *cp)
7257 struct tcb *tp = &np->target[cp->target];
7258 struct lcb *lp = tp->lp[cp->lun];
7260 if (DEBUG_FLAGS & DEBUG_TAGS) {
7261 PRINT_ADDR(cp->cmd, "ccb @%p freeing tag %d.\n", cp, cp->tag);
7265 ** If lun control block available,
7266 ** decrement active commands and increment credit,
7267 ** free the tag if any and remove the JUMP for reselect.
7270 if (cp->tag != NO_TAG) {
7271 lp->cb_tags[lp->if_tag++] = cp->tag;
7272 if (lp->if_tag == MAX_TAGS)
7274 lp->tags_umap &= ~(((tagmap_t) 1) << cp->tag);
7275 lp->tags_smap &= lp->tags_umap;
7276 lp->jump_ccb[cp->tag] =
7277 cpu_to_scr(NCB_SCRIPTH_PHYS(np, bad_i_t_l_q));
7280 cpu_to_scr(NCB_SCRIPTH_PHYS(np, bad_i_t_l));
7285 ** Make this CCB available.
7290 list_move(&cp->link_ccbq, &lp->free_ccbq);
7296 cp -> host_status = HS_IDLE;
7305 wakeup ((caddr_t) cp);
7310 #define ncr_reg_bus_addr(r) (np->paddr + offsetof (struct ncr_reg, r))
7312 /*------------------------------------------------------------------------
7313 ** Initialize the fixed part of a CCB structure.
7314 **------------------------------------------------------------------------
7315 **------------------------------------------------------------------------
7317 static void ncr_init_ccb(struct ncb *np, struct ccb *cp)
7319 ncrcmd copy_4 = np->features & FE_PFEN ? SCR_COPY(4) : SCR_COPY_F(4);
7322 ** Remember virtual and bus address of this ccb.
7324 cp->p_ccb = vtobus(cp);
7325 cp->phys.header.cp = cp;
7328 ** This allows list_del to work for the default ccb.
7330 INIT_LIST_HEAD(&cp->link_ccbq);
7333 ** Initialyze the start and restart launch script.
7335 ** COPY(4) @(...p_phys), @(dsa)
7336 ** JUMP @(sched_point)
7338 cp->start.setup_dsa[0] = cpu_to_scr(copy_4);
7339 cp->start.setup_dsa[1] = cpu_to_scr(CCB_PHYS(cp, start.p_phys));
7340 cp->start.setup_dsa[2] = cpu_to_scr(ncr_reg_bus_addr(nc_dsa));
7341 cp->start.schedule.l_cmd = cpu_to_scr(SCR_JUMP);
7342 cp->start.p_phys = cpu_to_scr(CCB_PHYS(cp, phys));
7344 memcpy(&cp->restart, &cp->start, sizeof(cp->restart));
7346 cp->start.schedule.l_paddr = cpu_to_scr(NCB_SCRIPT_PHYS (np, idle));
7347 cp->restart.schedule.l_paddr = cpu_to_scr(NCB_SCRIPTH_PHYS (np, abort));
7351 /*------------------------------------------------------------------------
7352 ** Allocate a CCB and initialize its fixed part.
7353 **------------------------------------------------------------------------
7354 **------------------------------------------------------------------------
7356 static void ncr_alloc_ccb(struct ncb *np, u_char tn, u_char ln)
7358 struct tcb *tp = &np->target[tn];
7359 struct lcb *lp = tp->lp[ln];
7360 struct ccb *cp = NULL;
7363 ** Allocate memory for this CCB.
7365 cp = m_calloc_dma(sizeof(struct ccb), "CCB");
7370 ** Count it and initialyze it.
7374 memset(cp, 0, sizeof (*cp));
7375 ncr_init_ccb(np, cp);
7378 ** Chain into wakeup list and free ccb queue and take it
7379 ** into account for tagged commands.
7381 cp->link_ccb = np->ccb->link_ccb;
7382 np->ccb->link_ccb = cp;
7384 list_add(&cp->link_ccbq, &lp->free_ccbq);
7387 /*==========================================================
7390 ** Allocation of resources for Targets/Luns/Tags.
7393 **==========================================================
7397 /*------------------------------------------------------------------------
7398 ** Target control block initialisation.
7399 **------------------------------------------------------------------------
7400 ** This data structure is fully initialized after a SCSI command
7401 ** has been successfully completed for this target.
7402 ** It contains a SCRIPT that is called on target reselection.
7403 **------------------------------------------------------------------------
7405 static void ncr_init_tcb (struct ncb *np, u_char tn)
7407 struct tcb *tp = &np->target[tn];
7408 ncrcmd copy_1 = np->features & FE_PFEN ? SCR_COPY(1) : SCR_COPY_F(1);
7413 ** Jump to next tcb if SFBR does not match this target.
7414 ** JUMP IF (SFBR != #target#), @(next tcb)
7416 tp->jump_tcb.l_cmd =
7417 cpu_to_scr((SCR_JUMP ^ IFFALSE (DATA (0x80 + tn))));
7418 tp->jump_tcb.l_paddr = np->jump_tcb[th].l_paddr;
7421 ** Load the synchronous transfer register.
7422 ** COPY @(tp->sval), @(sxfer)
7424 tp->getscr[0] = cpu_to_scr(copy_1);
7425 tp->getscr[1] = cpu_to_scr(vtobus (&tp->sval));
7426 #ifdef SCSI_NCR_BIG_ENDIAN
7427 tp->getscr[2] = cpu_to_scr(ncr_reg_bus_addr(nc_sxfer) ^ 3);
7429 tp->getscr[2] = cpu_to_scr(ncr_reg_bus_addr(nc_sxfer));
7433 ** Load the timing register.
7434 ** COPY @(tp->wval), @(scntl3)
7436 tp->getscr[3] = cpu_to_scr(copy_1);
7437 tp->getscr[4] = cpu_to_scr(vtobus (&tp->wval));
7438 #ifdef SCSI_NCR_BIG_ENDIAN
7439 tp->getscr[5] = cpu_to_scr(ncr_reg_bus_addr(nc_scntl3) ^ 3);
7441 tp->getscr[5] = cpu_to_scr(ncr_reg_bus_addr(nc_scntl3));
7445 ** Get the IDENTIFY message and the lun.
7446 ** CALL @script(resel_lun)
7448 tp->call_lun.l_cmd = cpu_to_scr(SCR_CALL);
7449 tp->call_lun.l_paddr = cpu_to_scr(NCB_SCRIPT_PHYS (np, resel_lun));
7452 ** Look for the lun control block of this nexus.
7454 ** JUMP ^ IFTRUE (MASK (i, 3)), @(next_lcb)
7456 for (i = 0 ; i < 4 ; i++) {
7457 tp->jump_lcb[i].l_cmd =
7458 cpu_to_scr((SCR_JUMP ^ IFTRUE (MASK (i, 3))));
7459 tp->jump_lcb[i].l_paddr =
7460 cpu_to_scr(NCB_SCRIPTH_PHYS (np, bad_identify));
7464 ** Link this target control block to the JUMP chain.
7466 np->jump_tcb[th].l_paddr = cpu_to_scr(vtobus (&tp->jump_tcb));
7469 ** These assert's should be moved at driver initialisations.
7471 #ifdef SCSI_NCR_BIG_ENDIAN
7472 BUG_ON(((offsetof(struct ncr_reg, nc_sxfer) ^
7473 offsetof(struct tcb , sval )) &3) != 3);
7474 BUG_ON(((offsetof(struct ncr_reg, nc_scntl3) ^
7475 offsetof(struct tcb , wval )) &3) != 3);
7477 BUG_ON(((offsetof(struct ncr_reg, nc_sxfer) ^
7478 offsetof(struct tcb , sval )) &3) != 0);
7479 BUG_ON(((offsetof(struct ncr_reg, nc_scntl3) ^
7480 offsetof(struct tcb , wval )) &3) != 0);
7485 /*------------------------------------------------------------------------
7486 ** Lun control block allocation and initialization.
7487 **------------------------------------------------------------------------
7488 ** This data structure is allocated and initialized after a SCSI
7489 ** command has been successfully completed for this target/lun.
7490 **------------------------------------------------------------------------
7492 static struct lcb *ncr_alloc_lcb (struct ncb *np, u_char tn, u_char ln)
7494 struct tcb *tp = &np->target[tn];
7495 struct lcb *lp = tp->lp[ln];
7496 ncrcmd copy_4 = np->features & FE_PFEN ? SCR_COPY(4) : SCR_COPY_F(4);
7500 ** Already done, return.
7506 ** Allocate the lcb.
7508 lp = m_calloc_dma(sizeof(struct lcb), "LCB");
7511 memset(lp, 0, sizeof(*lp));
7515 ** Initialize the target control block if not yet.
7517 if (!tp->jump_tcb.l_cmd)
7518 ncr_init_tcb(np, tn);
7521 ** Initialize the CCB queue headers.
7523 INIT_LIST_HEAD(&lp->free_ccbq);
7524 INIT_LIST_HEAD(&lp->busy_ccbq);
7525 INIT_LIST_HEAD(&lp->wait_ccbq);
7526 INIT_LIST_HEAD(&lp->skip_ccbq);
7529 ** Set max CCBs to 1 and use the default 1 entry
7530 ** jump table by default.
7533 lp->jump_ccb = &lp->jump_ccb_0;
7534 lp->p_jump_ccb = cpu_to_scr(vtobus(lp->jump_ccb));
7537 ** Initilialyze the reselect script:
7539 ** Jump to next lcb if SFBR does not match this lun.
7540 ** Load TEMP with the CCB direct jump table bus address.
7541 ** Get the SIMPLE TAG message and the tag.
7543 ** JUMP IF (SFBR != #lun#), @(next lcb)
7544 ** COPY @(lp->p_jump_ccb), @(temp)
7545 ** JUMP @script(resel_notag)
7547 lp->jump_lcb.l_cmd =
7548 cpu_to_scr((SCR_JUMP ^ IFFALSE (MASK (0x80+ln, 0xff))));
7549 lp->jump_lcb.l_paddr = tp->jump_lcb[lh].l_paddr;
7551 lp->load_jump_ccb[0] = cpu_to_scr(copy_4);
7552 lp->load_jump_ccb[1] = cpu_to_scr(vtobus (&lp->p_jump_ccb));
7553 lp->load_jump_ccb[2] = cpu_to_scr(ncr_reg_bus_addr(nc_temp));
7555 lp->jump_tag.l_cmd = cpu_to_scr(SCR_JUMP);
7556 lp->jump_tag.l_paddr = cpu_to_scr(NCB_SCRIPT_PHYS (np, resel_notag));
7559 ** Link this lun control block to the JUMP chain.
7561 tp->jump_lcb[lh].l_paddr = cpu_to_scr(vtobus (&lp->jump_lcb));
7564 ** Initialize command queuing control.
7574 /*------------------------------------------------------------------------
7575 ** Lun control block setup on INQUIRY data received.
7576 **------------------------------------------------------------------------
7577 ** We only support WIDE, SYNC for targets and CMDQ for logical units.
7578 ** This setup is done on each INQUIRY since we are expecting user
7579 ** will play with CHANGE DEFINITION commands. :-)
7580 **------------------------------------------------------------------------
7582 static struct lcb *ncr_setup_lcb (struct ncb *np, struct scsi_device *sdev)
7584 unsigned char tn = sdev->id, ln = sdev->lun;
7585 struct tcb *tp = &np->target[tn];
7586 struct lcb *lp = tp->lp[ln];
7588 /* If no lcb, try to allocate it. */
7589 if (!lp && !(lp = ncr_alloc_lcb(np, tn, ln)))
7593 ** If unit supports tagged commands, allocate the
7594 ** CCB JUMP table if not yet.
7596 if (sdev->tagged_supported && lp->jump_ccb == &lp->jump_ccb_0) {
7598 lp->jump_ccb = m_calloc_dma(256, "JUMP_CCB");
7599 if (!lp->jump_ccb) {
7600 lp->jump_ccb = &lp->jump_ccb_0;
7603 lp->p_jump_ccb = cpu_to_scr(vtobus(lp->jump_ccb));
7604 for (i = 0 ; i < 64 ; i++)
7606 cpu_to_scr(NCB_SCRIPTH_PHYS (np, bad_i_t_l_q));
7607 for (i = 0 ; i < MAX_TAGS ; i++)
7609 lp->maxnxs = MAX_TAGS;
7610 lp->tags_stime = jiffies + 3*HZ;
7611 ncr_setup_tags (np, sdev);
7619 /*==========================================================
7622 ** Build Scatter Gather Block
7625 **==========================================================
7627 ** The transfer area may be scattered among
7628 ** several non adjacent physical pages.
7630 ** We may use MAX_SCATTER blocks.
7632 **----------------------------------------------------------
7636 ** We try to reduce the number of interrupts caused
7637 ** by unexpected phase changes due to disconnects.
7638 ** A typical harddisk may disconnect before ANY block.
7639 ** If we wanted to avoid unexpected phase changes at all
7640 ** we had to use a break point every 512 bytes.
7641 ** Of course the number of scatter/gather blocks is
7643 ** Under Linux, the scatter/gatter blocks are provided by
7644 ** the generic driver. We just have to copy addresses and
7645 ** sizes to the data segment array.
7648 static int ncr_scatter(struct ncb *np, struct ccb *cp, struct scsi_cmnd *cmd)
7651 int use_sg = scsi_sg_count(cmd);
7655 use_sg = map_scsi_sg_data(np, cmd);
7657 struct scatterlist *sg;
7658 struct scr_tblmove *data;
7660 if (use_sg > MAX_SCATTER) {
7661 unmap_scsi_data(np, cmd);
7665 data = &cp->phys.data[MAX_SCATTER - use_sg];
7667 scsi_for_each_sg(cmd, sg, use_sg, segment) {
7668 dma_addr_t baddr = sg_dma_address(sg);
7669 unsigned int len = sg_dma_len(sg);
7671 ncr_build_sge(np, &data[segment], baddr, len);
7672 cp->data_len += len;
7680 /*==========================================================
7683 ** Test the bus snoop logic :-(
7685 ** Has to be called with interrupts disabled.
7688 **==========================================================
7691 static int __init ncr_regtest (struct ncb* np)
7693 register volatile u32 data;
7695 ** ncr registers may NOT be cached.
7696 ** write 0xffffffff to a read only register area,
7697 ** and try to read it back.
7700 OUTL_OFF(offsetof(struct ncr_reg, nc_dstat), data);
7701 data = INL_OFF(offsetof(struct ncr_reg, nc_dstat));
7703 if (data == 0xffffffff) {
7705 if ((data & 0xe2f0fffd) != 0x02000080) {
7707 printk ("CACHE TEST FAILED: reg dstat-sstat2 readback %x.\n",
7714 static int __init ncr_snooptest (struct ncb* np)
7716 u32 ncr_rd, ncr_wr, ncr_bk, host_rd, host_wr, pc;
7719 err |= ncr_regtest (np);
7725 pc = NCB_SCRIPTH_PHYS (np, snooptest);
7729 ** Set memory and register.
7731 np->ncr_cache = cpu_to_scr(host_wr);
7732 OUTL (nc_temp, ncr_wr);
7734 ** Start script (exchange values)
7738 ** Wait 'til done (with timeout)
7740 for (i=0; i<NCR_SNOOP_TIMEOUT; i++)
7741 if (INB(nc_istat) & (INTF|SIP|DIP))
7744 ** Save termination position.
7748 ** Read memory and register.
7750 host_rd = scr_to_cpu(np->ncr_cache);
7751 ncr_rd = INL (nc_scratcha);
7752 ncr_bk = INL (nc_temp);
7756 ncr_chip_reset(np, 100);
7758 ** check for timeout
7760 if (i>=NCR_SNOOP_TIMEOUT) {
7761 printk ("CACHE TEST FAILED: timeout.\n");
7765 ** Check termination position.
7767 if (pc != NCB_SCRIPTH_PHYS (np, snoopend)+8) {
7768 printk ("CACHE TEST FAILED: script execution failed.\n");
7769 printk ("start=%08lx, pc=%08lx, end=%08lx\n",
7770 (u_long) NCB_SCRIPTH_PHYS (np, snooptest), (u_long) pc,
7771 (u_long) NCB_SCRIPTH_PHYS (np, snoopend) +8);
7777 if (host_wr != ncr_rd) {
7778 printk ("CACHE TEST FAILED: host wrote %d, ncr read %d.\n",
7779 (int) host_wr, (int) ncr_rd);
7782 if (host_rd != ncr_wr) {
7783 printk ("CACHE TEST FAILED: ncr wrote %d, host read %d.\n",
7784 (int) ncr_wr, (int) host_rd);
7787 if (ncr_bk != ncr_wr) {
7788 printk ("CACHE TEST FAILED: ncr wrote %d, read back %d.\n",
7789 (int) ncr_wr, (int) ncr_bk);
7795 /*==========================================================
7797 ** Determine the ncr's clock frequency.
7798 ** This is essential for the negotiation
7799 ** of the synchronous transfer rate.
7801 **==========================================================
7803 ** Note: we have to return the correct value.
7804 ** THERE IS NO SAFE DEFAULT VALUE.
7806 ** Most NCR/SYMBIOS boards are delivered with a 40 Mhz clock.
7807 ** 53C860 and 53C875 rev. 1 support fast20 transfers but
7808 ** do not have a clock doubler and so are provided with a
7809 ** 80 MHz clock. All other fast20 boards incorporate a doubler
7810 ** and so should be delivered with a 40 MHz clock.
7811 ** The future fast40 chips (895/895) use a 40 Mhz base clock
7812 ** and provide a clock quadrupler (160 Mhz). The code below
7813 ** tries to deal as cleverly as possible with all this stuff.
7815 **----------------------------------------------------------
7819 * Select NCR SCSI clock frequency
7821 static void ncr_selectclock(struct ncb *np, u_char scntl3)
7823 if (np->multiplier < 2) {
7824 OUTB(nc_scntl3, scntl3);
7828 if (bootverbose >= 2)
7829 printk ("%s: enabling clock multiplier\n", ncr_name(np));
7831 OUTB(nc_stest1, DBLEN); /* Enable clock multiplier */
7832 if (np->multiplier > 2) { /* Poll bit 5 of stest4 for quadrupler */
7834 while (!(INB(nc_stest4) & LCKFRQ) && --i > 0)
7837 printk("%s: the chip cannot lock the frequency\n", ncr_name(np));
7838 } else /* Wait 20 micro-seconds for doubler */
7840 OUTB(nc_stest3, HSC); /* Halt the scsi clock */
7841 OUTB(nc_scntl3, scntl3);
7842 OUTB(nc_stest1, (DBLEN|DBLSEL));/* Select clock multiplier */
7843 OUTB(nc_stest3, 0x00); /* Restart scsi clock */
7848 * calculate NCR SCSI clock frequency (in KHz)
7850 static unsigned __init ncrgetfreq (struct ncb *np, int gen)
7856 * Measure GEN timer delay in order
7857 * to calculate SCSI clock frequency
7859 * This code will never execute too
7860 * many loop iterations (if DELAY is
7861 * reasonably correct). It could get
7862 * too low a delay (too high a freq.)
7863 * if the CPU is slow executing the
7864 * loop for some reason (an NMI, for
7865 * example). For this reason we will
7866 * if multiple measurements are to be
7867 * performed trust the higher delay
7868 * (lower frequency returned).
7870 OUTB (nc_stest1, 0); /* make sure clock doubler is OFF */
7871 OUTW (nc_sien , 0); /* mask all scsi interrupts */
7872 (void) INW (nc_sist); /* clear pending scsi interrupt */
7873 OUTB (nc_dien , 0); /* mask all dma interrupts */
7874 (void) INW (nc_sist); /* another one, just to be sure :) */
7875 OUTB (nc_scntl3, 4); /* set pre-scaler to divide by 3 */
7876 OUTB (nc_stime1, 0); /* disable general purpose timer */
7877 OUTB (nc_stime1, gen); /* set to nominal delay of 1<<gen * 125us */
7878 while (!(INW(nc_sist) & GEN) && ms++ < 100000) {
7879 for (count = 0; count < 10; count ++)
7880 udelay(100); /* count ms */
7882 OUTB (nc_stime1, 0); /* disable general purpose timer */
7884 * set prescaler to divide by whatever 0 means
7885 * 0 ought to choose divide by 2, but appears
7886 * to set divide by 3.5 mode in my 53c810 ...
7888 OUTB (nc_scntl3, 0);
7890 if (bootverbose >= 2)
7891 printk ("%s: Delay (GEN=%d): %u msec\n", ncr_name(np), gen, ms);
7893 * adjust for prescaler, and convert into KHz
7895 return ms ? ((1 << gen) * 4340) / ms : 0;
7899 * Get/probe NCR SCSI clock frequency
7901 static void __init ncr_getclock (struct ncb *np, int mult)
7903 unsigned char scntl3 = INB(nc_scntl3);
7904 unsigned char stest1 = INB(nc_stest1);
7911 ** True with 875 or 895 with clock multiplier selected
7913 if (mult > 1 && (stest1 & (DBLEN+DBLSEL)) == DBLEN+DBLSEL) {
7914 if (bootverbose >= 2)
7915 printk ("%s: clock multiplier found\n", ncr_name(np));
7916 np->multiplier = mult;
7920 ** If multiplier not found or scntl3 not 7,5,3,
7921 ** reset chip and get frequency from general purpose timer.
7922 ** Otherwise trust scntl3 BIOS setting.
7924 if (np->multiplier != mult || (scntl3 & 7) < 3 || !(scntl3 & 1)) {
7927 ncr_chip_reset(np, 5);
7929 (void) ncrgetfreq (np, 11); /* throw away first result */
7930 f1 = ncrgetfreq (np, 11);
7931 f2 = ncrgetfreq (np, 11);
7934 printk ("%s: NCR clock is %uKHz, %uKHz\n", ncr_name(np), f1, f2);
7936 if (f1 > f2) f1 = f2; /* trust lower result */
7938 if (f1 < 45000) f1 = 40000;
7939 else if (f1 < 55000) f1 = 50000;
7942 if (f1 < 80000 && mult > 1) {
7943 if (bootverbose >= 2)
7944 printk ("%s: clock multiplier assumed\n", ncr_name(np));
7945 np->multiplier = mult;
7948 if ((scntl3 & 7) == 3) f1 = 40000;
7949 else if ((scntl3 & 7) == 5) f1 = 80000;
7952 f1 /= np->multiplier;
7956 ** Compute controller synchronous parameters.
7958 f1 *= np->multiplier;
7962 /*===================== LINUX ENTRY POINTS SECTION ==========================*/
7964 static int ncr53c8xx_slave_alloc(struct scsi_device *device)
7966 struct Scsi_Host *host = device->host;
7967 struct ncb *np = ((struct host_data *) host->hostdata)->ncb;
7968 struct tcb *tp = &np->target[device->id];
7969 tp->starget = device->sdev_target;
7974 static int ncr53c8xx_slave_configure(struct scsi_device *device)
7976 struct Scsi_Host *host = device->host;
7977 struct ncb *np = ((struct host_data *) host->hostdata)->ncb;
7978 struct tcb *tp = &np->target[device->id];
7979 struct lcb *lp = tp->lp[device->lun];
7980 int numtags, depth_to_use;
7982 ncr_setup_lcb(np, device);
7985 ** Select queue depth from driver setup.
7986 ** Donnot use more than configured by user.
7988 ** Donnot use more than our maximum.
7990 numtags = device_queue_depth(np->unit, device->id, device->lun);
7991 if (numtags > tp->usrtags)
7992 numtags = tp->usrtags;
7993 if (!device->tagged_supported)
7995 depth_to_use = numtags;
7996 if (depth_to_use < 2)
7998 if (depth_to_use > MAX_TAGS)
7999 depth_to_use = MAX_TAGS;
8001 scsi_change_queue_depth(device, depth_to_use);
8004 ** Since the queue depth is not tunable under Linux,
8005 ** we need to know this value in order not to
8006 ** announce stupid things to user.
8008 ** XXX(hch): As of Linux 2.6 it certainly _is_ tunable..
8009 ** In fact we just tuned it, or did I miss
8010 ** something important? :)
8013 lp->numtags = lp->maxtags = numtags;
8014 lp->scdev_depth = depth_to_use;
8016 ncr_setup_tags (np, device);
8018 #ifdef DEBUG_NCR53C8XX
8019 printk("ncr53c8xx_select_queue_depth: host=%d, id=%d, lun=%d, depth=%d\n",
8020 np->unit, device->id, device->lun, depth_to_use);
8023 if (spi_support_sync(device->sdev_target) &&
8024 !spi_initial_dv(device->sdev_target))
8025 spi_dv_device(device);
8029 static int ncr53c8xx_queue_command_lck (struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
8031 struct ncb *np = ((struct host_data *) cmd->device->host->hostdata)->ncb;
8032 unsigned long flags;
8035 #ifdef DEBUG_NCR53C8XX
8036 printk("ncr53c8xx_queue_command\n");
8039 cmd->scsi_done = done;
8040 cmd->host_scribble = NULL;
8041 cmd->__data_mapped = 0;
8042 cmd->__data_mapping = 0;
8044 spin_lock_irqsave(&np->smp_lock, flags);
8046 if ((sts = ncr_queue_command(np, cmd)) != DID_OK) {
8047 set_host_byte(cmd, sts);
8048 #ifdef DEBUG_NCR53C8XX
8049 printk("ncr53c8xx : command not queued - result=%d\n", sts);
8052 #ifdef DEBUG_NCR53C8XX
8054 printk("ncr53c8xx : command successfully queued\n");
8057 spin_unlock_irqrestore(&np->smp_lock, flags);
8059 if (sts != DID_OK) {
8060 unmap_scsi_data(np, cmd);
8068 static DEF_SCSI_QCMD(ncr53c8xx_queue_command)
8070 irqreturn_t ncr53c8xx_intr(int irq, void *dev_id)
8072 unsigned long flags;
8073 struct Scsi_Host *shost = (struct Scsi_Host *)dev_id;
8074 struct host_data *host_data = (struct host_data *)shost->hostdata;
8075 struct ncb *np = host_data->ncb;
8076 struct scsi_cmnd *done_list;
8078 #ifdef DEBUG_NCR53C8XX
8079 printk("ncr53c8xx : interrupt received\n");
8082 if (DEBUG_FLAGS & DEBUG_TINY) printk ("[");
8084 spin_lock_irqsave(&np->smp_lock, flags);
8086 done_list = np->done_list;
8087 np->done_list = NULL;
8088 spin_unlock_irqrestore(&np->smp_lock, flags);
8090 if (DEBUG_FLAGS & DEBUG_TINY) printk ("]\n");
8093 ncr_flush_done_cmds(done_list);
8097 static void ncr53c8xx_timeout(struct timer_list *t)
8099 struct ncb *np = from_timer(np, t, timer);
8100 unsigned long flags;
8101 struct scsi_cmnd *done_list;
8103 spin_lock_irqsave(&np->smp_lock, flags);
8105 done_list = np->done_list;
8106 np->done_list = NULL;
8107 spin_unlock_irqrestore(&np->smp_lock, flags);
8110 ncr_flush_done_cmds(done_list);
8113 static int ncr53c8xx_bus_reset(struct scsi_cmnd *cmd)
8115 struct ncb *np = ((struct host_data *) cmd->device->host->hostdata)->ncb;
8117 unsigned long flags;
8118 struct scsi_cmnd *done_list;
8121 * If the mid-level driver told us reset is synchronous, it seems
8122 * that we must call the done() callback for the involved command,
8123 * even if this command was not queued to the low-level driver,
8124 * before returning SUCCESS.
8127 spin_lock_irqsave(&np->smp_lock, flags);
8128 sts = ncr_reset_bus(np, cmd, 1);
8130 done_list = np->done_list;
8131 np->done_list = NULL;
8132 spin_unlock_irqrestore(&np->smp_lock, flags);
8134 ncr_flush_done_cmds(done_list);
8139 #if 0 /* unused and broken */
8140 static int ncr53c8xx_abort(struct scsi_cmnd *cmd)
8142 struct ncb *np = ((struct host_data *) cmd->device->host->hostdata)->ncb;
8144 unsigned long flags;
8145 struct scsi_cmnd *done_list;
8147 printk("ncr53c8xx_abort\n");
8149 NCR_LOCK_NCB(np, flags);
8151 sts = ncr_abort_command(np, cmd);
8153 done_list = np->done_list;
8154 np->done_list = NULL;
8155 NCR_UNLOCK_NCB(np, flags);
8157 ncr_flush_done_cmds(done_list);
8165 ** Scsi command waiting list management.
8167 ** It may happen that we cannot insert a scsi command into the start queue,
8168 ** in the following circumstances.
8169 ** Too few preallocated ccb(s),
8170 ** maxtags < cmd_per_lun of the Linux host control block,
8172 ** Such scsi commands are inserted into a waiting list.
8173 ** When a scsi command complete, we try to requeue the commands of the
8177 #define next_wcmd host_scribble
8179 static void insert_into_waiting_list(struct ncb *np, struct scsi_cmnd *cmd)
8181 struct scsi_cmnd *wcmd;
8183 #ifdef DEBUG_WAITING_LIST
8184 printk("%s: cmd %lx inserted into waiting list\n", ncr_name(np), (u_long) cmd);
8186 cmd->next_wcmd = NULL;
8187 if (!(wcmd = np->waiting_list)) np->waiting_list = cmd;
8189 while (wcmd->next_wcmd)
8190 wcmd = (struct scsi_cmnd *) wcmd->next_wcmd;
8191 wcmd->next_wcmd = (char *) cmd;
8195 static struct scsi_cmnd *retrieve_from_waiting_list(int to_remove, struct ncb *np, struct scsi_cmnd *cmd)
8197 struct scsi_cmnd **pcmd = &np->waiting_list;
8202 *pcmd = (struct scsi_cmnd *) cmd->next_wcmd;
8203 cmd->next_wcmd = NULL;
8205 #ifdef DEBUG_WAITING_LIST
8206 printk("%s: cmd %lx retrieved from waiting list\n", ncr_name(np), (u_long) cmd);
8210 pcmd = (struct scsi_cmnd **) &(*pcmd)->next_wcmd;
8215 static void process_waiting_list(struct ncb *np, int sts)
8217 struct scsi_cmnd *waiting_list, *wcmd;
8219 waiting_list = np->waiting_list;
8220 np->waiting_list = NULL;
8222 #ifdef DEBUG_WAITING_LIST
8223 if (waiting_list) printk("%s: waiting_list=%lx processing sts=%d\n", ncr_name(np), (u_long) waiting_list, sts);
8225 while ((wcmd = waiting_list) != NULL) {
8226 waiting_list = (struct scsi_cmnd *) wcmd->next_wcmd;
8227 wcmd->next_wcmd = NULL;
8228 if (sts == DID_OK) {
8229 #ifdef DEBUG_WAITING_LIST
8230 printk("%s: cmd %lx trying to requeue\n", ncr_name(np), (u_long) wcmd);
8232 sts = ncr_queue_command(np, wcmd);
8234 if (sts != DID_OK) {
8235 #ifdef DEBUG_WAITING_LIST
8236 printk("%s: cmd %lx done forced sts=%d\n", ncr_name(np), (u_long) wcmd, sts);
8238 set_host_byte(wcmd, sts);
8239 ncr_queue_done_cmd(np, wcmd);
8246 static ssize_t show_ncr53c8xx_revision(struct device *dev,
8247 struct device_attribute *attr, char *buf)
8249 struct Scsi_Host *host = class_to_shost(dev);
8250 struct host_data *host_data = (struct host_data *)host->hostdata;
8252 return snprintf(buf, 20, "0x%x\n", host_data->ncb->revision_id);
8255 static struct device_attribute ncr53c8xx_revision_attr = {
8256 .attr = { .name = "revision", .mode = S_IRUGO, },
8257 .show = show_ncr53c8xx_revision,
8260 static struct device_attribute *ncr53c8xx_host_attrs[] = {
8261 &ncr53c8xx_revision_attr,
8265 /*==========================================================
8267 ** Boot command line.
8269 **==========================================================
8272 char *ncr53c8xx; /* command line passed by insmod */
8273 module_param(ncr53c8xx, charp, 0);
8277 static int __init ncr53c8xx_setup(char *str)
8279 return sym53c8xx__setup(str);
8282 __setup("ncr53c8xx=", ncr53c8xx_setup);
8287 * Host attach and initialisations.
8289 * Allocate host data and ncb structure.
8290 * Request IO region and remap MMIO region.
8291 * Do chip initialization.
8292 * If all is OK, install interrupt handling and
8293 * start the timer daemon.
8295 struct Scsi_Host * __init ncr_attach(struct scsi_host_template *tpnt,
8296 int unit, struct ncr_device *device)
8298 struct host_data *host_data;
8299 struct ncb *np = NULL;
8300 struct Scsi_Host *instance = NULL;
8305 tpnt->name = SCSI_NCR_DRIVER_NAME;
8306 if (!tpnt->shost_attrs)
8307 tpnt->shost_attrs = ncr53c8xx_host_attrs;
8309 tpnt->queuecommand = ncr53c8xx_queue_command;
8310 tpnt->slave_configure = ncr53c8xx_slave_configure;
8311 tpnt->slave_alloc = ncr53c8xx_slave_alloc;
8312 tpnt->eh_bus_reset_handler = ncr53c8xx_bus_reset;
8313 tpnt->can_queue = SCSI_NCR_CAN_QUEUE;
8315 tpnt->sg_tablesize = SCSI_NCR_SG_TABLESIZE;
8316 tpnt->cmd_per_lun = SCSI_NCR_CMD_PER_LUN;
8318 if (device->differential)
8319 driver_setup.diff_support = device->differential;
8321 printk(KERN_INFO "ncr53c720-%d: rev 0x%x irq %d\n",
8322 unit, device->chip.revision_id, device->slot.irq);
8324 instance = scsi_host_alloc(tpnt, sizeof(*host_data));
8327 host_data = (struct host_data *) instance->hostdata;
8329 np = __m_calloc_dma(device->dev, sizeof(struct ncb), "NCB");
8332 spin_lock_init(&np->smp_lock);
8333 np->dev = device->dev;
8334 np->p_ncb = vtobus(np);
8335 host_data->ncb = np;
8337 np->ccb = m_calloc_dma(sizeof(struct ccb), "CCB");
8341 /* Store input information in the host data structure. */
8343 np->verbose = driver_setup.verbose;
8344 sprintf(np->inst_name, "ncr53c720-%d", np->unit);
8345 np->revision_id = device->chip.revision_id;
8346 np->features = device->chip.features;
8347 np->clock_divn = device->chip.nr_divisor;
8348 np->maxoffs = device->chip.offset_max;
8349 np->maxburst = device->chip.burst_max;
8350 np->myaddr = device->host_id;
8352 /* Allocate SCRIPTS areas. */
8353 np->script0 = m_calloc_dma(sizeof(struct script), "SCRIPT");
8356 np->scripth0 = m_calloc_dma(sizeof(struct scripth), "SCRIPTH");
8360 timer_setup(&np->timer, ncr53c8xx_timeout, 0);
8362 /* Try to map the controller chip to virtual and physical memory. */
8364 np->paddr = device->slot.base;
8365 np->paddr2 = (np->features & FE_RAM) ? device->slot.base_2 : 0;
8367 if (device->slot.base_v)
8368 np->vaddr = device->slot.base_v;
8370 np->vaddr = ioremap(device->slot.base_c, 128);
8374 "%s: can't map memory mapped IO region\n",ncr_name(np));
8377 if (bootverbose > 1)
8379 "%s: using memory mapped IO at virtual address 0x%lx\n", ncr_name(np), (u_long) np->vaddr);
8382 /* Make the controller's registers available. Now the INB INW INL
8383 * OUTB OUTW OUTL macros can be used safely.
8386 np->reg = (struct ncr_reg __iomem *)np->vaddr;
8388 /* Do chip dependent initialization. */
8389 ncr_prepare_setting(np);
8391 if (np->paddr2 && sizeof(struct script) > 4096) {
8393 printk(KERN_WARNING "%s: script too large, NOT using on chip RAM.\n",
8397 instance->max_channel = 0;
8398 instance->this_id = np->myaddr;
8399 instance->max_id = np->maxwide ? 16 : 8;
8400 instance->max_lun = SCSI_NCR_MAX_LUN;
8401 instance->base = (unsigned long) np->reg;
8402 instance->irq = device->slot.irq;
8403 instance->unique_id = device->slot.base;
8404 instance->dma_channel = 0;
8405 instance->cmd_per_lun = MAX_TAGS;
8406 instance->can_queue = (MAX_START-4);
8407 /* This can happen if you forget to call ncr53c8xx_init from
8408 * your module_init */
8409 BUG_ON(!ncr53c8xx_transport_template);
8410 instance->transportt = ncr53c8xx_transport_template;
8412 /* Patch script to physical addresses */
8413 ncr_script_fill(&script0, &scripth0);
8415 np->scripth = np->scripth0;
8416 np->p_scripth = vtobus(np->scripth);
8417 np->p_script = (np->paddr2) ? np->paddr2 : vtobus(np->script0);
8419 ncr_script_copy_and_bind(np, (ncrcmd *) &script0,
8420 (ncrcmd *) np->script0, sizeof(struct script));
8421 ncr_script_copy_and_bind(np, (ncrcmd *) &scripth0,
8422 (ncrcmd *) np->scripth0, sizeof(struct scripth));
8423 np->ccb->p_ccb = vtobus (np->ccb);
8425 /* Patch the script for LED support. */
8427 if (np->features & FE_LED0) {
8428 np->script0->idle[0] =
8429 cpu_to_scr(SCR_REG_REG(gpreg, SCR_OR, 0x01));
8430 np->script0->reselected[0] =
8431 cpu_to_scr(SCR_REG_REG(gpreg, SCR_AND, 0xfe));
8432 np->script0->start[0] =
8433 cpu_to_scr(SCR_REG_REG(gpreg, SCR_AND, 0xfe));
8437 * Look for the target control block of this nexus.
8439 * JUMP ^ IFTRUE (MASK (i, 3)), @(next_lcb)
8441 for (i = 0 ; i < 4 ; i++) {
8442 np->jump_tcb[i].l_cmd =
8443 cpu_to_scr((SCR_JUMP ^ IFTRUE (MASK (i, 3))));
8444 np->jump_tcb[i].l_paddr =
8445 cpu_to_scr(NCB_SCRIPTH_PHYS (np, bad_target));
8448 ncr_chip_reset(np, 100);
8450 /* Now check the cache handling of the chipset. */
8452 if (ncr_snooptest(np)) {
8453 printk(KERN_ERR "CACHE INCORRECTLY CONFIGURED.\n");
8457 /* Install the interrupt handler. */
8458 np->irq = device->slot.irq;
8460 /* Initialize the fixed part of the default ccb. */
8461 ncr_init_ccb(np, np->ccb);
8464 * After SCSI devices have been opened, we cannot reset the bus
8465 * safely, so we do it here. Interrupt handler does the real work.
8466 * Process the reset exception if interrupts are not enabled yet.
8467 * Then enable disconnects.
8469 spin_lock_irqsave(&np->smp_lock, flags);
8470 if (ncr_reset_scsi_bus(np, 0, driver_setup.settle_delay) != 0) {
8471 printk(KERN_ERR "%s: FATAL ERROR: CHECK SCSI BUS - CABLES, TERMINATION, DEVICE POWER etc.!\n", ncr_name(np));
8473 spin_unlock_irqrestore(&np->smp_lock, flags);
8481 * The middle-level SCSI driver does not wait for devices to settle.
8482 * Wait synchronously if more than 2 seconds.
8484 if (driver_setup.settle_delay > 2) {
8485 printk(KERN_INFO "%s: waiting %d seconds for scsi devices to settle...\n",
8486 ncr_name(np), driver_setup.settle_delay);
8487 mdelay(1000 * driver_setup.settle_delay);
8490 /* start the timeout daemon */
8494 /* use SIMPLE TAG messages by default */
8495 #ifdef SCSI_NCR_ALWAYS_SIMPLE_TAG
8496 np->order = SIMPLE_QUEUE_TAG;
8499 spin_unlock_irqrestore(&np->smp_lock, flags);
8506 printk(KERN_INFO "%s: detaching...\n", ncr_name(np));
8510 m_free_dma(np->scripth0, sizeof(struct scripth), "SCRIPTH");
8512 m_free_dma(np->script0, sizeof(struct script), "SCRIPT");
8514 m_free_dma(np->ccb, sizeof(struct ccb), "CCB");
8515 m_free_dma(np, sizeof(struct ncb), "NCB");
8516 host_data->ncb = NULL;
8519 scsi_host_put(instance);
8525 void ncr53c8xx_release(struct Scsi_Host *host)
8527 struct host_data *host_data = shost_priv(host);
8528 #ifdef DEBUG_NCR53C8XX
8529 printk("ncr53c8xx: release\n");
8532 ncr_detach(host_data->ncb);
8533 scsi_host_put(host);
8536 static void ncr53c8xx_set_period(struct scsi_target *starget, int period)
8538 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
8539 struct ncb *np = ((struct host_data *)shost->hostdata)->ncb;
8540 struct tcb *tp = &np->target[starget->id];
8542 if (period > np->maxsync)
8543 period = np->maxsync;
8544 else if (period < np->minsync)
8545 period = np->minsync;
8547 tp->usrsync = period;
8549 ncr_negotiate(np, tp);
8552 static void ncr53c8xx_set_offset(struct scsi_target *starget, int offset)
8554 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
8555 struct ncb *np = ((struct host_data *)shost->hostdata)->ncb;
8556 struct tcb *tp = &np->target[starget->id];
8558 if (offset > np->maxoffs)
8559 offset = np->maxoffs;
8560 else if (offset < 0)
8563 tp->maxoffs = offset;
8565 ncr_negotiate(np, tp);
8568 static void ncr53c8xx_set_width(struct scsi_target *starget, int width)
8570 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
8571 struct ncb *np = ((struct host_data *)shost->hostdata)->ncb;
8572 struct tcb *tp = &np->target[starget->id];
8574 if (width > np->maxwide)
8575 width = np->maxwide;
8579 tp->usrwide = width;
8581 ncr_negotiate(np, tp);
8584 static void ncr53c8xx_get_signalling(struct Scsi_Host *shost)
8586 struct ncb *np = ((struct host_data *)shost->hostdata)->ncb;
8587 enum spi_signal_type type;
8589 switch (np->scsi_mode) {
8591 type = SPI_SIGNAL_SE;
8594 type = SPI_SIGNAL_HVD;
8597 type = SPI_SIGNAL_UNKNOWN;
8600 spi_signalling(shost) = type;
8603 static struct spi_function_template ncr53c8xx_transport_functions = {
8604 .set_period = ncr53c8xx_set_period,
8606 .set_offset = ncr53c8xx_set_offset,
8608 .set_width = ncr53c8xx_set_width,
8610 .get_signalling = ncr53c8xx_get_signalling,
8613 int __init ncr53c8xx_init(void)
8615 ncr53c8xx_transport_template = spi_attach_transport(&ncr53c8xx_transport_functions);
8616 if (!ncr53c8xx_transport_template)
8621 void ncr53c8xx_exit(void)
8623 spi_release_transport(ncr53c8xx_transport_template);