1 /******************************************************************************
2 ** Device driver for the PCI-SCSI NCR538XX controller family.
4 ** Copyright (C) 1994 Wolfgang Stanglmeier
6 ** This program is free software; you can redistribute it and/or modify
7 ** it under the terms of the GNU General Public License as published by
8 ** the Free Software Foundation; either version 2 of the License, or
9 ** (at your option) any later version.
11 ** This program is distributed in the hope that it will be useful,
12 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
13 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 ** GNU General Public License for more details.
16 ** You should have received a copy of the GNU General Public License
17 ** along with this program; if not, write to the Free Software
18 ** Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 **-----------------------------------------------------------------------------
22 ** This driver has been ported to Linux from the FreeBSD NCR53C8XX driver
23 ** and is currently maintained by
25 ** Gerard Roudier <groudier@free.fr>
27 ** Being given that this driver originates from the FreeBSD version, and
28 ** in order to keep synergy on both, any suggested enhancements and corrections
29 ** received on Linux are automatically a potential candidate for the FreeBSD
32 ** The original driver has been written for 386bsd and FreeBSD by
33 ** Wolfgang Stanglmeier <wolf@cologne.de>
34 ** Stefan Esser <se@mi.Uni-Koeln.de>
36 ** And has been ported to NetBSD by
37 ** Charles M. Hannum <mycroft@gnu.ai.mit.edu>
39 **-----------------------------------------------------------------------------
43 ** December 10 1995 by Gerard Roudier:
44 ** Initial port to Linux.
46 ** June 23 1996 by Gerard Roudier:
47 ** Support for 64 bits architectures (Alpha).
49 ** November 30 1996 by Gerard Roudier:
50 ** Support for Fast-20 scsi.
51 ** Support for large DMA fifo and 128 dwords bursting.
53 ** February 27 1997 by Gerard Roudier:
54 ** Support for Fast-40 scsi.
55 ** Support for on-Board RAM.
57 ** May 3 1997 by Gerard Roudier:
58 ** Full support for scsi scripts instructions pre-fetching.
60 ** May 19 1997 by Richard Waltham <dormouse@farsrobt.demon.co.uk>:
61 ** Support for NvRAM detection and reading.
63 ** August 18 1997 by Cort <cort@cs.nmt.edu>:
64 ** Support for Power/PC (Big Endian).
66 ** June 20 1998 by Gerard Roudier
67 ** Support for up to 64 tags per lun.
68 ** O(1) everywhere (C and SCRIPTS) for normal cases.
69 ** Low PCI traffic for command handling when on-chip RAM is present.
70 ** Aggressive SCSI SCRIPTS optimizations.
72 ** 2005 by Matthew Wilcox and James Bottomley
73 ** PCI-ectomy. This driver now supports only the 720 chip (see the
74 ** NCR_Q720 and zalon drivers for the bus probe logic).
76 *******************************************************************************
80 ** Supported SCSI-II features:
81 ** Synchronous negotiation
82 ** Wide negotiation (depends on the NCR Chip)
83 ** Enable disconnection
84 ** Tagged command queuing
88 ** Supported NCR/SYMBIOS chips:
89 ** 53C720 (Wide, Fast SCSI-2, intfly problems)
92 /* Name and version of the driver */
93 #define SCSI_NCR_DRIVER_NAME "ncr53c8xx-3.4.3g"
95 #define SCSI_NCR_DEBUG_FLAGS (0)
97 #include <linux/blkdev.h>
98 #include <linux/delay.h>
99 #include <linux/dma-mapping.h>
100 #include <linux/errno.h>
101 #include <linux/init.h>
102 #include <linux/interrupt.h>
103 #include <linux/ioport.h>
104 #include <linux/mm.h>
105 #include <linux/module.h>
106 #include <linux/sched.h>
107 #include <linux/signal.h>
108 #include <linux/spinlock.h>
109 #include <linux/stat.h>
110 #include <linux/string.h>
111 #include <linux/time.h>
112 #include <linux/timer.h>
113 #include <linux/types.h>
117 #include <asm/system.h>
119 #include <scsi/scsi.h>
120 #include <scsi/scsi_cmnd.h>
121 #include <scsi/scsi_dbg.h>
122 #include <scsi/scsi_device.h>
123 #include <scsi/scsi_tcq.h>
124 #include <scsi/scsi_transport.h>
125 #include <scsi/scsi_transport_spi.h>
127 #include "ncr53c8xx.h"
129 #define NAME53C8XX "ncr53c8xx"
131 /*==========================================================
135 **==========================================================
138 #define DEBUG_ALLOC (0x0001)
139 #define DEBUG_PHASE (0x0002)
140 #define DEBUG_QUEUE (0x0008)
141 #define DEBUG_RESULT (0x0010)
142 #define DEBUG_POINTER (0x0020)
143 #define DEBUG_SCRIPT (0x0040)
144 #define DEBUG_TINY (0x0080)
145 #define DEBUG_TIMING (0x0100)
146 #define DEBUG_NEGO (0x0200)
147 #define DEBUG_TAGS (0x0400)
148 #define DEBUG_SCATTER (0x0800)
149 #define DEBUG_IC (0x1000)
152 ** Enable/Disable debug messages.
153 ** Can be changed at runtime too.
156 #ifdef SCSI_NCR_DEBUG_INFO_SUPPORT
157 static int ncr_debug = SCSI_NCR_DEBUG_FLAGS;
158 #define DEBUG_FLAGS ncr_debug
160 #define DEBUG_FLAGS SCSI_NCR_DEBUG_FLAGS
163 static inline struct list_head *ncr_list_pop(struct list_head *head)
165 if (!list_empty(head)) {
166 struct list_head *elem = head->next;
175 /*==========================================================
177 ** Simple power of two buddy-like allocator.
179 ** This simple code is not intended to be fast, but to
180 ** provide power of 2 aligned memory allocations.
181 ** Since the SCRIPTS processor only supplies 8 bit
182 ** arithmetic, this allocator allows simple and fast
183 ** address calculations from the SCRIPTS code.
184 ** In addition, cache line alignment is guaranteed for
185 ** power of 2 cache line size.
186 ** Enhanced in linux-2.3.44 to provide a memory pool
187 ** per pcidev to support dynamic dma mapping. (I would
188 ** have preferred a real bus abstraction, btw).
190 **==========================================================
193 #define MEMO_SHIFT 4 /* 16 bytes minimum memory chunk */
194 #if PAGE_SIZE >= 8192
195 #define MEMO_PAGE_ORDER 0 /* 1 PAGE maximum */
197 #define MEMO_PAGE_ORDER 1 /* 2 PAGES maximum */
199 #define MEMO_FREE_UNUSED /* Free unused pages immediately */
201 #define MEMO_GFP_FLAGS GFP_ATOMIC
202 #define MEMO_CLUSTER_SHIFT (PAGE_SHIFT+MEMO_PAGE_ORDER)
203 #define MEMO_CLUSTER_SIZE (1UL << MEMO_CLUSTER_SHIFT)
204 #define MEMO_CLUSTER_MASK (MEMO_CLUSTER_SIZE-1)
206 typedef u_long m_addr_t; /* Enough bits to bit-hack addresses */
207 typedef struct device *m_bush_t; /* Something that addresses DMAable */
209 typedef struct m_link { /* Link between free memory chunks */
213 typedef struct m_vtob { /* Virtual to Bus address translation */
218 #define VTOB_HASH_SHIFT 5
219 #define VTOB_HASH_SIZE (1UL << VTOB_HASH_SHIFT)
220 #define VTOB_HASH_MASK (VTOB_HASH_SIZE-1)
221 #define VTOB_HASH_CODE(m) \
222 ((((m_addr_t) (m)) >> MEMO_CLUSTER_SHIFT) & VTOB_HASH_MASK)
224 typedef struct m_pool { /* Memory pool of a given kind */
226 m_addr_t (*getp)(struct m_pool *);
227 void (*freep)(struct m_pool *, m_addr_t);
229 m_vtob_s *(vtob[VTOB_HASH_SIZE]);
231 struct m_link h[PAGE_SHIFT-MEMO_SHIFT+MEMO_PAGE_ORDER+1];
234 static void *___m_alloc(m_pool_s *mp, int size)
237 int s = (1 << MEMO_SHIFT);
242 if (size > (PAGE_SIZE << MEMO_PAGE_ORDER))
252 if (s == (PAGE_SIZE << MEMO_PAGE_ORDER)) {
253 h[j].next = (m_link_s *)mp->getp(mp);
255 h[j].next->next = NULL;
261 a = (m_addr_t) h[j].next;
263 h[j].next = h[j].next->next;
267 h[j].next = (m_link_s *) (a+s);
268 h[j].next->next = NULL;
272 printk("___m_alloc(%d) = %p\n", size, (void *) a);
277 static void ___m_free(m_pool_s *mp, void *ptr, int size)
280 int s = (1 << MEMO_SHIFT);
286 printk("___m_free(%p, %d)\n", ptr, size);
289 if (size > (PAGE_SIZE << MEMO_PAGE_ORDER))
300 #ifdef MEMO_FREE_UNUSED
301 if (s == (PAGE_SIZE << MEMO_PAGE_ORDER)) {
308 while (q->next && q->next != (m_link_s *) b) {
312 ((m_link_s *) a)->next = h[i].next;
313 h[i].next = (m_link_s *) a;
316 q->next = q->next->next;
323 static DEFINE_SPINLOCK(ncr53c8xx_lock);
325 static void *__m_calloc2(m_pool_s *mp, int size, char *name, int uflags)
329 p = ___m_alloc(mp, size);
331 if (DEBUG_FLAGS & DEBUG_ALLOC)
332 printk ("new %-10s[%4d] @%p.\n", name, size, p);
336 else if (uflags & MEMO_WARN)
337 printk (NAME53C8XX ": failed to allocate %s[%d]\n", name, size);
342 #define __m_calloc(mp, s, n) __m_calloc2(mp, s, n, MEMO_WARN)
344 static void __m_free(m_pool_s *mp, void *ptr, int size, char *name)
346 if (DEBUG_FLAGS & DEBUG_ALLOC)
347 printk ("freeing %-10s[%4d] @%p.\n", name, size, ptr);
349 ___m_free(mp, ptr, size);
354 * With pci bus iommu support, we use a default pool of unmapped memory
355 * for memory we donnot need to DMA from/to and one pool per pcidev for
356 * memory accessed by the PCI chip. `mp0' is the default not DMAable pool.
359 static m_addr_t ___mp0_getp(m_pool_s *mp)
361 m_addr_t m = __get_free_pages(MEMO_GFP_FLAGS, MEMO_PAGE_ORDER);
367 static void ___mp0_freep(m_pool_s *mp, m_addr_t m)
369 free_pages(m, MEMO_PAGE_ORDER);
373 static m_pool_s mp0 = {NULL, ___mp0_getp, ___mp0_freep};
380 * With pci bus iommu support, we maintain one pool per pcidev and a
381 * hashed reverse table for virtual to bus physical address translations.
383 static m_addr_t ___dma_getp(m_pool_s *mp)
388 vbp = __m_calloc(&mp0, sizeof(*vbp), "VTOB");
391 vp = (m_addr_t) dma_alloc_coherent(mp->bush,
392 PAGE_SIZE<<MEMO_PAGE_ORDER,
395 int hc = VTOB_HASH_CODE(vp);
398 vbp->next = mp->vtob[hc];
405 __m_free(&mp0, vbp, sizeof(*vbp), "VTOB");
409 static void ___dma_freep(m_pool_s *mp, m_addr_t m)
411 m_vtob_s **vbpp, *vbp;
412 int hc = VTOB_HASH_CODE(m);
414 vbpp = &mp->vtob[hc];
415 while (*vbpp && (*vbpp)->vaddr != m)
416 vbpp = &(*vbpp)->next;
419 *vbpp = (*vbpp)->next;
420 dma_free_coherent(mp->bush, PAGE_SIZE<<MEMO_PAGE_ORDER,
421 (void *)vbp->vaddr, (dma_addr_t)vbp->baddr);
422 __m_free(&mp0, vbp, sizeof(*vbp), "VTOB");
427 static inline m_pool_s *___get_dma_pool(m_bush_t bush)
430 for (mp = mp0.next; mp && mp->bush != bush; mp = mp->next);
434 static m_pool_s *___cre_dma_pool(m_bush_t bush)
437 mp = __m_calloc(&mp0, sizeof(*mp), "MPOOL");
439 memset(mp, 0, sizeof(*mp));
441 mp->getp = ___dma_getp;
442 mp->freep = ___dma_freep;
449 static void ___del_dma_pool(m_pool_s *p)
451 struct m_pool **pp = &mp0.next;
453 while (*pp && *pp != p)
457 __m_free(&mp0, p, sizeof(*p), "MPOOL");
461 static void *__m_calloc_dma(m_bush_t bush, int size, char *name)
467 spin_lock_irqsave(&ncr53c8xx_lock, flags);
468 mp = ___get_dma_pool(bush);
470 mp = ___cre_dma_pool(bush);
472 m = __m_calloc(mp, size, name);
475 spin_unlock_irqrestore(&ncr53c8xx_lock, flags);
480 static void __m_free_dma(m_bush_t bush, void *m, int size, char *name)
485 spin_lock_irqsave(&ncr53c8xx_lock, flags);
486 mp = ___get_dma_pool(bush);
488 __m_free(mp, m, size, name);
491 spin_unlock_irqrestore(&ncr53c8xx_lock, flags);
494 static m_addr_t __vtobus(m_bush_t bush, void *m)
498 int hc = VTOB_HASH_CODE(m);
500 m_addr_t a = ((m_addr_t) m) & ~MEMO_CLUSTER_MASK;
502 spin_lock_irqsave(&ncr53c8xx_lock, flags);
503 mp = ___get_dma_pool(bush);
506 while (vp && (m_addr_t) vp->vaddr != a)
509 spin_unlock_irqrestore(&ncr53c8xx_lock, flags);
510 return vp ? vp->baddr + (((m_addr_t) m) - a) : 0;
513 #define _m_calloc_dma(np, s, n) __m_calloc_dma(np->dev, s, n)
514 #define _m_free_dma(np, p, s, n) __m_free_dma(np->dev, p, s, n)
515 #define m_calloc_dma(s, n) _m_calloc_dma(np, s, n)
516 #define m_free_dma(p, s, n) _m_free_dma(np, p, s, n)
517 #define _vtobus(np, p) __vtobus(np->dev, p)
518 #define vtobus(p) _vtobus(np, p)
521 * Deal with DMA mapping/unmapping.
524 /* To keep track of the dma mapping (sg/single) that has been set */
525 #define __data_mapped SCp.phase
526 #define __data_mapping SCp.have_data_in
528 static void __unmap_scsi_data(struct device *dev, struct scsi_cmnd *cmd)
530 switch(cmd->__data_mapped) {
535 cmd->__data_mapped = 0;
538 static int __map_scsi_sg_data(struct device *dev, struct scsi_cmnd *cmd)
542 use_sg = scsi_dma_map(cmd);
546 cmd->__data_mapped = 2;
547 cmd->__data_mapping = use_sg;
552 #define unmap_scsi_data(np, cmd) __unmap_scsi_data(np->dev, cmd)
553 #define map_scsi_sg_data(np, cmd) __map_scsi_sg_data(np->dev, cmd)
555 /*==========================================================
559 ** This structure is initialized from linux config
560 ** options. It can be overridden at boot-up by the boot
563 **==========================================================
565 static struct ncr_driver_setup
566 driver_setup = SCSI_NCR_DRIVER_SETUP;
569 #ifdef SCSI_NCR_BOOT_COMMAND_LINE_SUPPORT
570 static struct ncr_driver_setup
571 driver_safe_setup __initdata = SCSI_NCR_DRIVER_SAFE_SETUP;
575 #define initverbose (driver_setup.verbose)
576 #define bootverbose (np->verbose)
579 /*===================================================================
581 ** Driver setup from the boot command line
583 **===================================================================
593 #define OPT_MASTER_PARITY 2
594 #define OPT_SCSI_PARITY 3
595 #define OPT_DISCONNECTION 4
596 #define OPT_SPECIAL_FEATURES 5
597 #define OPT_UNUSED_1 6
598 #define OPT_FORCE_SYNC_NEGO 7
599 #define OPT_REVERSE_PROBE 8
600 #define OPT_DEFAULT_SYNC 9
601 #define OPT_VERBOSE 10
603 #define OPT_BURST_MAX 12
604 #define OPT_LED_PIN 13
605 #define OPT_MAX_WIDE 14
606 #define OPT_SETTLE_DELAY 15
607 #define OPT_DIFF_SUPPORT 16
609 #define OPT_PCI_FIX_UP 18
610 #define OPT_BUS_CHECK 19
611 #define OPT_OPTIMIZE 20
612 #define OPT_RECOVERY 21
613 #define OPT_SAFE_SETUP 22
614 #define OPT_USE_NVRAM 23
615 #define OPT_EXCLUDE 24
616 #define OPT_HOST_ID 25
618 #ifdef SCSI_NCR_IARB_SUPPORT
629 static char setup_token[] __initdata =
643 #ifdef SCSI_NCR_IARB_SUPPORT
646 ; /* DONNOT REMOVE THIS ';' */
648 static int __init get_setup_token(char *p)
650 char *cur = setup_token;
654 while (cur != NULL && (pc = strchr(cur, ':')) != NULL) {
657 if (!strncmp(p, cur, pc - cur))
664 static int __init sym53c8xx__setup(char *str)
666 #ifdef SCSI_NCR_BOOT_COMMAND_LINE_SUPPORT
672 while (cur != NULL && (pc = strchr(cur, ':')) != NULL) {
684 val = (int) simple_strtoul(pv, &pe, 0);
686 switch (get_setup_token(cur)) {
688 driver_setup.default_tags = val;
689 if (pe && *pe == '/') {
691 while (*pe && *pe != ARG_SEP &&
692 i < sizeof(driver_setup.tag_ctrl)-1) {
693 driver_setup.tag_ctrl[i++] = *pe++;
695 driver_setup.tag_ctrl[i] = '\0';
698 case OPT_MASTER_PARITY:
699 driver_setup.master_parity = val;
701 case OPT_SCSI_PARITY:
702 driver_setup.scsi_parity = val;
704 case OPT_DISCONNECTION:
705 driver_setup.disconnection = val;
707 case OPT_SPECIAL_FEATURES:
708 driver_setup.special_features = val;
710 case OPT_FORCE_SYNC_NEGO:
711 driver_setup.force_sync_nego = val;
713 case OPT_REVERSE_PROBE:
714 driver_setup.reverse_probe = val;
716 case OPT_DEFAULT_SYNC:
717 driver_setup.default_sync = val;
720 driver_setup.verbose = val;
723 driver_setup.debug = val;
726 driver_setup.burst_max = val;
729 driver_setup.led_pin = val;
732 driver_setup.max_wide = val? 1:0;
734 case OPT_SETTLE_DELAY:
735 driver_setup.settle_delay = val;
737 case OPT_DIFF_SUPPORT:
738 driver_setup.diff_support = val;
741 driver_setup.irqm = val;
744 driver_setup.pci_fix_up = val;
747 driver_setup.bus_check = val;
750 driver_setup.optimize = val;
753 driver_setup.recovery = val;
756 driver_setup.use_nvram = val;
759 memcpy(&driver_setup, &driver_safe_setup,
760 sizeof(driver_setup));
763 if (xi < SCSI_NCR_MAX_EXCLUDES)
764 driver_setup.excludes[xi++] = val;
767 driver_setup.host_id = val;
769 #ifdef SCSI_NCR_IARB_SUPPORT
771 driver_setup.iarb = val;
775 printk("sym53c8xx_setup: unexpected boot option '%.*s' ignored\n", (int)(pc-cur+1), cur);
779 if ((cur = strchr(cur, ARG_SEP)) != NULL)
782 #endif /* SCSI_NCR_BOOT_COMMAND_LINE_SUPPORT */
787 /*===================================================================
789 ** Get device queue depth from boot command line.
791 **===================================================================
793 #define DEF_DEPTH (driver_setup.default_tags)
794 #define ALL_TARGETS -2
799 static int device_queue_depth(int unit, int target, int lun)
802 char *p = driver_setup.tag_ctrl;
808 while ((c = *p++) != 0) {
809 v = simple_strtoul(p, &ep, 0);
818 t = (target == v) ? v : NO_TARGET;
823 u = (lun == v) ? v : NO_LUN;
827 (t == ALL_TARGETS || t == target) &&
828 (u == ALL_LUNS || u == lun))
844 /*==========================================================
846 ** The CCB done queue uses an array of CCB virtual
847 ** addresses. Empty entries are flagged using the bogus
848 ** virtual address 0xffffffff.
850 ** Since PCI ensures that only aligned DWORDs are accessed
851 ** atomically, 64 bit little-endian architecture requires
852 ** to test the high order DWORD of the entry to determine
853 ** if it is empty or valid.
855 ** BTW, I will make things differently as soon as I will
856 ** have a better idea, but this is simple and should work.
858 **==========================================================
861 #define SCSI_NCR_CCB_DONE_SUPPORT
862 #ifdef SCSI_NCR_CCB_DONE_SUPPORT
865 #define CCB_DONE_EMPTY 0xffffffffUL
867 /* All 32 bit architectures */
868 #if BITS_PER_LONG == 32
869 #define CCB_DONE_VALID(cp) (((u_long) cp) != CCB_DONE_EMPTY)
871 /* All > 32 bit (64 bit) architectures regardless endian-ness */
873 #define CCB_DONE_VALID(cp) \
874 ((((u_long) cp) & 0xffffffff00000000ul) && \
875 (((u_long) cp) & 0xfffffffful) != CCB_DONE_EMPTY)
878 #endif /* SCSI_NCR_CCB_DONE_SUPPORT */
880 /*==========================================================
882 ** Configuration and Debugging
884 **==========================================================
888 ** SCSI address of this device.
889 ** The boot routines should have set it.
893 #ifndef SCSI_NCR_MYADDR
894 #define SCSI_NCR_MYADDR (7)
898 ** The maximum number of tags per logic unit.
899 ** Used only for disk devices that support tags.
902 #ifndef SCSI_NCR_MAX_TAGS
903 #define SCSI_NCR_MAX_TAGS (8)
907 ** TAGS are actually limited to 64 tags/lun.
908 ** We need to deal with power of 2, for alignment constraints.
910 #if SCSI_NCR_MAX_TAGS > 64
911 #define MAX_TAGS (64)
913 #define MAX_TAGS SCSI_NCR_MAX_TAGS
919 ** Choose appropriate type for tag bitmap.
922 typedef u64 tagmap_t;
924 typedef u32 tagmap_t;
928 ** Number of targets supported by the driver.
929 ** n permits target numbers 0..n-1.
930 ** Default is 16, meaning targets #0..#15.
934 #ifdef SCSI_NCR_MAX_TARGET
935 #define MAX_TARGET (SCSI_NCR_MAX_TARGET)
937 #define MAX_TARGET (16)
941 ** Number of logic units supported by the driver.
942 ** n enables logic unit numbers 0..n-1.
943 ** The common SCSI devices require only
944 ** one lun, so take 1 as the default.
947 #ifdef SCSI_NCR_MAX_LUN
948 #define MAX_LUN SCSI_NCR_MAX_LUN
954 ** Asynchronous pre-scaler (ns). Shall be 40
957 #ifndef SCSI_NCR_MIN_ASYNC
958 #define SCSI_NCR_MIN_ASYNC (40)
962 ** The maximum number of jobs scheduled for starting.
963 ** There should be one slot per target, and one slot
964 ** for each tag of each target in use.
965 ** The calculation below is actually quite silly ...
968 #ifdef SCSI_NCR_CAN_QUEUE
969 #define MAX_START (SCSI_NCR_CAN_QUEUE + 4)
971 #define MAX_START (MAX_TARGET + 7 * MAX_TAGS)
975 ** We limit the max number of pending IO to 250.
976 ** since we donnot want to allocate more than 1
977 ** PAGE for 'scripth'.
981 #define MAX_START 250
985 ** The maximum number of segments a transfer is split into.
986 ** We support up to 127 segments for both read and write.
987 ** The data scripts are broken into 2 sub-scripts.
988 ** 80 (MAX_SCATTERL) segments are moved from a sub-script
989 ** in on-chip RAM. This makes data transfers shorter than
990 ** 80k (assuming 1k fs) as fast as possible.
993 #define MAX_SCATTER (SCSI_NCR_MAX_SCATTER)
995 #if (MAX_SCATTER > 80)
996 #define MAX_SCATTERL 80
997 #define MAX_SCATTERH (MAX_SCATTER - MAX_SCATTERL)
999 #define MAX_SCATTERL (MAX_SCATTER-1)
1000 #define MAX_SCATTERH 1
1007 #define NCR_SNOOP_TIMEOUT (1000000)
1010 ** Other definitions
1013 #define ScsiResult(host_code, scsi_code) (((host_code) << 16) + ((scsi_code) & 0x7f))
1015 #define initverbose (driver_setup.verbose)
1016 #define bootverbose (np->verbose)
1018 /*==========================================================
1020 ** Command control block states.
1022 **==========================================================
1027 #define HS_NEGOTIATE (2) /* sync/wide data transfer*/
1028 #define HS_DISCONNECT (3) /* Disconnected by target */
1030 #define HS_DONEMASK (0x80)
1031 #define HS_COMPLETE (4|HS_DONEMASK)
1032 #define HS_SEL_TIMEOUT (5|HS_DONEMASK) /* Selection timeout */
1033 #define HS_RESET (6|HS_DONEMASK) /* SCSI reset */
1034 #define HS_ABORTED (7|HS_DONEMASK) /* Transfer aborted */
1035 #define HS_TIMEOUT (8|HS_DONEMASK) /* Software timeout */
1036 #define HS_FAIL (9|HS_DONEMASK) /* SCSI or PCI bus errors */
1037 #define HS_UNEXPECTED (10|HS_DONEMASK)/* Unexpected disconnect */
1040 ** Invalid host status values used by the SCRIPTS processor
1041 ** when the nexus is not fully identified.
1042 ** Shall never appear in a CCB.
1045 #define HS_INVALMASK (0x40)
1046 #define HS_SELECTING (0|HS_INVALMASK)
1047 #define HS_IN_RESELECT (1|HS_INVALMASK)
1048 #define HS_STARTING (2|HS_INVALMASK)
1051 ** Flags set by the SCRIPT processor for commands
1052 ** that have been skipped.
1054 #define HS_SKIPMASK (0x20)
1056 /*==========================================================
1058 ** Software Interrupt Codes
1060 **==========================================================
1063 #define SIR_BAD_STATUS (1)
1064 #define SIR_XXXXXXXXXX (2)
1065 #define SIR_NEGO_SYNC (3)
1066 #define SIR_NEGO_WIDE (4)
1067 #define SIR_NEGO_FAILED (5)
1068 #define SIR_NEGO_PROTO (6)
1069 #define SIR_REJECT_RECEIVED (7)
1070 #define SIR_REJECT_SENT (8)
1071 #define SIR_IGN_RESIDUE (9)
1072 #define SIR_MISSING_SAVE (10)
1073 #define SIR_RESEL_NO_MSG_IN (11)
1074 #define SIR_RESEL_NO_IDENTIFY (12)
1075 #define SIR_RESEL_BAD_LUN (13)
1076 #define SIR_RESEL_BAD_TARGET (14)
1077 #define SIR_RESEL_BAD_I_T_L (15)
1078 #define SIR_RESEL_BAD_I_T_L_Q (16)
1079 #define SIR_DONE_OVERFLOW (17)
1080 #define SIR_INTFLY (18)
1081 #define SIR_MAX (18)
1083 /*==========================================================
1085 ** Extended error codes.
1086 ** xerr_status field of struct ccb.
1088 **==========================================================
1092 #define XE_EXTRA_DATA (1) /* unexpected data phase */
1093 #define XE_BAD_PHASE (2) /* illegal phase (4/5) */
1095 /*==========================================================
1097 ** Negotiation status.
1098 ** nego_status field of struct ccb.
1100 **==========================================================
1103 #define NS_NOCHANGE (0)
1108 /*==========================================================
1112 **==========================================================
1115 #define CCB_MAGIC (0xf2691ad2)
1117 /*==========================================================
1119 ** Declaration of structs.
1121 **==========================================================
1124 static struct scsi_transport_template *ncr53c8xx_transport_template = NULL;
1144 #define UC_SETSYNC 10
1145 #define UC_SETTAGS 11
1146 #define UC_SETDEBUG 12
1147 #define UC_SETORDER 13
1148 #define UC_SETWIDE 14
1149 #define UC_SETFLAG 15
1150 #define UC_SETVERBOSE 17
1152 #define UF_TRACE (0x01)
1153 #define UF_NODISC (0x02)
1154 #define UF_NOSCAN (0x04)
1156 /*========================================================================
1158 ** Declaration of structs: target control block
1160 **========================================================================
1163 /*----------------------------------------------------------------
1164 ** During reselection the ncr jumps to this point with SFBR
1165 ** set to the encoded target number with bit 7 set.
1166 ** if it's not this target, jump to the next.
1168 ** JUMP IF (SFBR != #target#), @(next tcb)
1169 **----------------------------------------------------------------
1171 struct link jump_tcb;
1173 /*----------------------------------------------------------------
1174 ** Load the actual values for the sxfer and the scntl3
1175 ** register (sync/wide mode).
1177 ** SCR_COPY (1), @(sval field of this tcb), @(sxfer register)
1178 ** SCR_COPY (1), @(wval field of this tcb), @(scntl3 register)
1179 **----------------------------------------------------------------
1183 /*----------------------------------------------------------------
1184 ** Get the IDENTIFY message and load the LUN to SFBR.
1186 ** CALL, <RESEL_LUN>
1187 **----------------------------------------------------------------
1189 struct link call_lun;
1191 /*----------------------------------------------------------------
1192 ** Now look for the right lun.
1195 ** SCR_JUMP ^ IFTRUE(MASK(i, 3)), @(first lcb mod. i)
1197 ** Recent chips will prefetch the 4 JUMPS using only 1 burst.
1198 ** It is kind of hashcoding.
1199 **----------------------------------------------------------------
1201 struct link jump_lcb[4]; /* JUMPs for reselection */
1202 struct lcb * lp[MAX_LUN]; /* The lcb's of this tcb */
1204 /*----------------------------------------------------------------
1205 ** Pointer to the ccb used for negotiation.
1206 ** Prevent from starting a negotiation for all queued commands
1207 ** when tagged command queuing is enabled.
1208 **----------------------------------------------------------------
1210 struct ccb * nego_cp;
1212 /*----------------------------------------------------------------
1214 **----------------------------------------------------------------
1219 /*----------------------------------------------------------------
1220 ** negotiation of wide and synch transfer and device quirks.
1221 **----------------------------------------------------------------
1223 #ifdef SCSI_NCR_BIG_ENDIAN
1226 /*3*/ u_char minsync;
1228 /*1*/ u_char widedone;
1229 /*2*/ u_char quirks;
1230 /*3*/ u_char maxoffs;
1232 /*0*/ u_char minsync;
1235 /*0*/ u_char maxoffs;
1236 /*1*/ u_char quirks;
1237 /*2*/ u_char widedone;
1241 /* User settable limits and options. */
1246 struct scsi_target *starget;
1249 /*========================================================================
1251 ** Declaration of structs: lun control block
1253 **========================================================================
1256 /*----------------------------------------------------------------
1257 ** During reselection the ncr jumps to this point
1258 ** with SFBR set to the "Identify" message.
1259 ** if it's not this lun, jump to the next.
1261 ** JUMP IF (SFBR != #lun#), @(next lcb of this target)
1263 ** It is this lun. Load TEMP with the nexus jumps table
1264 ** address and jump to RESEL_TAG (or RESEL_NOTAG).
1266 ** SCR_COPY (4), p_jump_ccb, TEMP,
1267 ** SCR_JUMP, <RESEL_TAG>
1268 **----------------------------------------------------------------
1270 struct link jump_lcb;
1271 ncrcmd load_jump_ccb[3];
1272 struct link jump_tag;
1273 ncrcmd p_jump_ccb; /* Jump table bus address */
1275 /*----------------------------------------------------------------
1276 ** Jump table used by the script processor to directly jump
1277 ** to the CCB corresponding to the reselected nexus.
1278 ** Address is allocated on 256 bytes boundary in order to
1279 ** allow 8 bit calculation of the tag jump entry for up to
1280 ** 64 possible tags.
1281 **----------------------------------------------------------------
1283 u32 jump_ccb_0; /* Default table if no tags */
1284 u32 *jump_ccb; /* Virtual address */
1286 /*----------------------------------------------------------------
1287 ** CCB queue management.
1288 **----------------------------------------------------------------
1290 struct list_head free_ccbq; /* Queue of available CCBs */
1291 struct list_head busy_ccbq; /* Queue of busy CCBs */
1292 struct list_head wait_ccbq; /* Queue of waiting for IO CCBs */
1293 struct list_head skip_ccbq; /* Queue of skipped CCBs */
1294 u_char actccbs; /* Number of allocated CCBs */
1295 u_char busyccbs; /* CCBs busy for this lun */
1296 u_char queuedccbs; /* CCBs queued to the controller*/
1297 u_char queuedepth; /* Queue depth for this lun */
1298 u_char scdev_depth; /* SCSI device queue depth */
1299 u_char maxnxs; /* Max possible nexuses */
1301 /*----------------------------------------------------------------
1302 ** Control of tagged command queuing.
1303 ** Tags allocation is performed using a circular buffer.
1304 ** This avoids using a loop for tag allocation.
1305 **----------------------------------------------------------------
1307 u_char ia_tag; /* Allocation index */
1308 u_char if_tag; /* Freeing index */
1309 u_char cb_tags[MAX_TAGS]; /* Circular tags buffer */
1310 u_char usetags; /* Command queuing is active */
1311 u_char maxtags; /* Max nr of tags asked by user */
1312 u_char numtags; /* Current number of tags */
1314 /*----------------------------------------------------------------
1315 ** QUEUE FULL control and ORDERED tag control.
1316 **----------------------------------------------------------------
1318 /*----------------------------------------------------------------
1319 ** QUEUE FULL and ORDERED tag control.
1320 **----------------------------------------------------------------
1322 u16 num_good; /* Nr of GOOD since QUEUE FULL */
1323 tagmap_t tags_umap; /* Used tags bitmap */
1324 tagmap_t tags_smap; /* Tags in use at 'tag_stime' */
1325 u_long tags_stime; /* Last time we set smap=umap */
1326 struct ccb * held_ccb; /* CCB held for QUEUE FULL */
1329 /*========================================================================
1331 ** Declaration of structs: the launch script.
1333 **========================================================================
1335 ** It is part of the CCB and is called by the scripts processor to
1336 ** start or restart the data structure (nexus).
1337 ** This 6 DWORDs mini script makes use of prefetching.
1339 **------------------------------------------------------------------------
1342 /*----------------------------------------------------------------
1343 ** SCR_COPY(4), @(p_phys), @(dsa register)
1344 ** SCR_JUMP, @(scheduler_point)
1345 **----------------------------------------------------------------
1347 ncrcmd setup_dsa[3]; /* Copy 'phys' address to dsa */
1348 struct link schedule; /* Jump to scheduler point */
1349 ncrcmd p_phys; /* 'phys' header bus address */
1352 /*========================================================================
1354 ** Declaration of structs: global HEADER.
1356 **========================================================================
1358 ** This substructure is copied from the ccb to a global address after
1359 ** selection (or reselection) and copied back before disconnect.
1361 ** These fields are accessible to the script processor.
1363 **------------------------------------------------------------------------
1367 /*----------------------------------------------------------------
1368 ** Saved data pointer.
1369 ** Points to the position in the script responsible for the
1370 ** actual transfer transfer of data.
1371 ** It's written after reception of a SAVE_DATA_POINTER message.
1372 ** The goalpointer points after the last transfer command.
1373 **----------------------------------------------------------------
1379 /*----------------------------------------------------------------
1380 ** Alternate data pointer.
1381 ** They are copied back to savep/lastp/goalp by the SCRIPTS
1382 ** when the direction is unknown and the device claims data out.
1383 **----------------------------------------------------------------
1388 /*----------------------------------------------------------------
1389 ** The virtual address of the ccb containing this header.
1390 **----------------------------------------------------------------
1394 /*----------------------------------------------------------------
1396 **----------------------------------------------------------------
1398 u_char scr_st[4]; /* script status */
1399 u_char status[4]; /* host status. must be the */
1400 /* last DWORD of the header. */
1404 ** The status bytes are used by the host and the script processor.
1406 ** The byte corresponding to the host_status must be stored in the
1407 ** last DWORD of the CCB header since it is used for command
1408 ** completion (ncr_wakeup()). Doing so, we are sure that the header
1409 ** has been entirely copied back to the CCB when the host_status is
1410 ** seen complete by the CPU.
1412 ** The last four bytes (status[4]) are copied to the scratchb register
1413 ** (declared as scr0..scr3 in ncr_reg.h) just after the select/reselect,
1414 ** and copied back just after disconnecting.
1415 ** Inside the script the XX_REG are used.
1417 ** The first four bytes (scr_st[4]) are used inside the script by
1419 ** Because source and destination must have the same alignment
1420 ** in a DWORD, the fields HAVE to be at the chosen offsets.
1421 ** xerr_st 0 (0x34) scratcha
1422 ** sync_st 1 (0x05) sxfer
1423 ** wide_st 3 (0x03) scntl3
1427 ** Last four bytes (script)
1431 #define HS_PRT nc_scr1
1433 #define SS_PRT nc_scr2
1437 ** Last four bytes (host)
1439 #ifdef SCSI_NCR_BIG_ENDIAN
1440 #define actualquirks phys.header.status[3]
1441 #define host_status phys.header.status[2]
1442 #define scsi_status phys.header.status[1]
1443 #define parity_status phys.header.status[0]
1445 #define actualquirks phys.header.status[0]
1446 #define host_status phys.header.status[1]
1447 #define scsi_status phys.header.status[2]
1448 #define parity_status phys.header.status[3]
1452 ** First four bytes (script)
1454 #define xerr_st header.scr_st[0]
1455 #define sync_st header.scr_st[1]
1456 #define nego_st header.scr_st[2]
1457 #define wide_st header.scr_st[3]
1460 ** First four bytes (host)
1462 #define xerr_status phys.xerr_st
1463 #define nego_status phys.nego_st
1466 #define sync_status phys.sync_st
1467 #define wide_status phys.wide_st
1470 /*==========================================================
1472 ** Declaration of structs: Data structure block
1474 **==========================================================
1476 ** During execution of a ccb by the script processor,
1477 ** the DSA (data structure address) register points
1478 ** to this substructure of the ccb.
1479 ** This substructure contains the header with
1480 ** the script-processor-changeable data and
1481 ** data blocks for the indirect move commands.
1483 **----------------------------------------------------------
1495 ** Table data for Script
1498 struct scr_tblsel select;
1499 struct scr_tblmove smsg ;
1500 struct scr_tblmove cmd ;
1501 struct scr_tblmove sense ;
1502 struct scr_tblmove data[MAX_SCATTER];
1506 /*========================================================================
1508 ** Declaration of structs: Command control block.
1510 **========================================================================
1513 /*----------------------------------------------------------------
1514 ** This is the data structure which is pointed by the DSA
1515 ** register when it is executed by the script processor.
1516 ** It must be the first entry because it contains the header
1517 ** as first entry that must be cache line aligned.
1518 **----------------------------------------------------------------
1522 /*----------------------------------------------------------------
1523 ** Mini-script used at CCB execution start-up.
1524 ** Load the DSA with the data structure address (phys) and
1525 ** jump to SELECT. Jump to CANCEL if CCB is to be canceled.
1526 **----------------------------------------------------------------
1528 struct launch start;
1530 /*----------------------------------------------------------------
1531 ** Mini-script used at CCB relection to restart the nexus.
1532 ** Load the DSA with the data structure address (phys) and
1533 ** jump to RESEL_DSA. Jump to ABORT if CCB is to be aborted.
1534 **----------------------------------------------------------------
1536 struct launch restart;
1538 /*----------------------------------------------------------------
1539 ** If a data transfer phase is terminated too early
1540 ** (after reception of a message (i.e. DISCONNECT)),
1541 ** we have to prepare a mini script to transfer
1542 ** the rest of the data.
1543 **----------------------------------------------------------------
1547 /*----------------------------------------------------------------
1548 ** The general SCSI driver provides a
1549 ** pointer to a control block.
1550 **----------------------------------------------------------------
1552 struct scsi_cmnd *cmd; /* SCSI command */
1553 u_char cdb_buf[16]; /* Copy of CDB */
1554 u_char sense_buf[64];
1555 int data_len; /* Total data length */
1557 /*----------------------------------------------------------------
1559 ** We prepare a message to be sent after selection.
1560 ** We may use a second one if the command is rescheduled
1561 ** due to GETCC or QFULL.
1562 ** Contents are IDENTIFY and SIMPLE_TAG.
1563 ** While negotiating sync or wide transfer,
1564 ** a SDTR or WDTR message is appended.
1565 **----------------------------------------------------------------
1567 u_char scsi_smsg [8];
1568 u_char scsi_smsg2[8];
1570 /*----------------------------------------------------------------
1572 **----------------------------------------------------------------
1574 u_long p_ccb; /* BUS address of this CCB */
1575 u_char sensecmd[6]; /* Sense command */
1576 u_char tag; /* Tag for this transfer */
1577 /* 255 means no tag */
1582 struct ccb * link_ccb; /* Host adapter CCB chain */
1583 struct list_head link_ccbq; /* Link to unit CCB queue */
1584 u32 startp; /* Initial data pointer */
1585 u_long magic; /* Free / busy CCB flag */
1588 #define CCB_PHYS(cp,lbl) (cp->p_ccb + offsetof(struct ccb, lbl))
1591 /*========================================================================
1593 ** Declaration of structs: NCR device descriptor
1595 **========================================================================
1598 /*----------------------------------------------------------------
1599 ** The global header.
1600 ** It is accessible to both the host and the script processor.
1601 ** Must be cache line size aligned (32 for x86) in order to
1602 ** allow cache line bursting when it is copied to/from CCB.
1603 **----------------------------------------------------------------
1607 /*----------------------------------------------------------------
1608 ** CCBs management queues.
1609 **----------------------------------------------------------------
1611 struct scsi_cmnd *waiting_list; /* Commands waiting for a CCB */
1612 /* when lcb is not allocated. */
1613 struct scsi_cmnd *done_list; /* Commands waiting for done() */
1614 /* callback to be invoked. */
1615 spinlock_t smp_lock; /* Lock for SMP threading */
1617 /*----------------------------------------------------------------
1618 ** Chip and controller indentification.
1619 **----------------------------------------------------------------
1621 int unit; /* Unit number */
1622 char inst_name[16]; /* ncb instance name */
1624 /*----------------------------------------------------------------
1625 ** Initial value of some IO register bits.
1626 ** These values are assumed to have been set by BIOS, and may
1627 ** be used for probing adapter implementation differences.
1628 **----------------------------------------------------------------
1630 u_char sv_scntl0, sv_scntl3, sv_dmode, sv_dcntl, sv_ctest0, sv_ctest3,
1631 sv_ctest4, sv_ctest5, sv_gpcntl, sv_stest2, sv_stest4;
1633 /*----------------------------------------------------------------
1634 ** Actual initial value of IO register bits used by the
1635 ** driver. They are loaded at initialisation according to
1636 ** features that are to be enabled.
1637 **----------------------------------------------------------------
1639 u_char rv_scntl0, rv_scntl3, rv_dmode, rv_dcntl, rv_ctest0, rv_ctest3,
1640 rv_ctest4, rv_ctest5, rv_stest2;
1642 /*----------------------------------------------------------------
1643 ** Targets management.
1644 ** During reselection the ncr jumps to jump_tcb.
1645 ** The SFBR register is loaded with the encoded target id.
1647 ** SCR_JUMP ^ IFTRUE(MASK(i, 3)), @(next tcb mod. i)
1649 ** Recent chips will prefetch the 4 JUMPS using only 1 burst.
1650 ** It is kind of hashcoding.
1651 **----------------------------------------------------------------
1653 struct link jump_tcb[4]; /* JUMPs for reselection */
1654 struct tcb target[MAX_TARGET]; /* Target data */
1656 /*----------------------------------------------------------------
1657 ** Virtual and physical bus addresses of the chip.
1658 **----------------------------------------------------------------
1660 void __iomem *vaddr; /* Virtual and bus address of */
1661 unsigned long paddr; /* chip's IO registers. */
1662 unsigned long paddr2; /* On-chip RAM bus address. */
1663 volatile /* Pointer to volatile for */
1664 struct ncr_reg __iomem *reg; /* memory mapped IO. */
1666 /*----------------------------------------------------------------
1667 ** SCRIPTS virtual and physical bus addresses.
1668 ** 'script' is loaded in the on-chip RAM if present.
1669 ** 'scripth' stays in main memory.
1670 **----------------------------------------------------------------
1672 struct script *script0; /* Copies of script and scripth */
1673 struct scripth *scripth0; /* relocated for this ncb. */
1674 struct scripth *scripth; /* Actual scripth virt. address */
1675 u_long p_script; /* Actual script and scripth */
1676 u_long p_scripth; /* bus addresses. */
1678 /*----------------------------------------------------------------
1679 ** General controller parameters and configuration.
1680 **----------------------------------------------------------------
1683 u_char revision_id; /* PCI device revision id */
1684 u32 irq; /* IRQ level */
1685 u32 features; /* Chip features map */
1686 u_char myaddr; /* SCSI id of the adapter */
1687 u_char maxburst; /* log base 2 of dwords burst */
1688 u_char maxwide; /* Maximum transfer width */
1689 u_char minsync; /* Minimum sync period factor */
1690 u_char maxsync; /* Maximum sync period factor */
1691 u_char maxoffs; /* Max scsi offset */
1692 u_char multiplier; /* Clock multiplier (1,2,4) */
1693 u_char clock_divn; /* Number of clock divisors */
1694 u_long clock_khz; /* SCSI clock frequency in KHz */
1696 /*----------------------------------------------------------------
1697 ** Start queue management.
1698 ** It is filled up by the host processor and accessed by the
1699 ** SCRIPTS processor in order to start SCSI commands.
1700 **----------------------------------------------------------------
1702 u16 squeueput; /* Next free slot of the queue */
1703 u16 actccbs; /* Number of allocated CCBs */
1704 u16 queuedccbs; /* Number of CCBs in start queue*/
1705 u16 queuedepth; /* Start queue depth */
1707 /*----------------------------------------------------------------
1709 **----------------------------------------------------------------
1711 struct timer_list timer; /* Timer handler link header */
1713 u_long settle_time; /* Resetting the SCSI BUS */
1715 /*----------------------------------------------------------------
1716 ** Debugging and profiling.
1717 **----------------------------------------------------------------
1719 struct ncr_reg regdump; /* Register dump */
1720 u_long regtime; /* Time it has been done */
1722 /*----------------------------------------------------------------
1723 ** Miscellaneous buffers accessed by the scripts-processor.
1724 ** They shall be DWORD aligned, because they may be read or
1725 ** written with a SCR_COPY script command.
1726 **----------------------------------------------------------------
1728 u_char msgout[8]; /* Buffer for MESSAGE OUT */
1729 u_char msgin [8]; /* Buffer for MESSAGE IN */
1730 u32 lastmsg; /* Last SCSI message sent */
1731 u_char scratch; /* Scratch for SCSI receive */
1733 /*----------------------------------------------------------------
1734 ** Miscellaneous configuration and status parameters.
1735 **----------------------------------------------------------------
1737 u_char disc; /* Diconnection allowed */
1738 u_char scsi_mode; /* Current SCSI BUS mode */
1739 u_char order; /* Tag order to use */
1740 u_char verbose; /* Verbosity for this controller*/
1741 int ncr_cache; /* Used for cache test at init. */
1742 u_long p_ncb; /* BUS address of this NCB */
1744 /*----------------------------------------------------------------
1745 ** Command completion handling.
1746 **----------------------------------------------------------------
1748 #ifdef SCSI_NCR_CCB_DONE_SUPPORT
1749 struct ccb *(ccb_done[MAX_DONE]);
1752 /*----------------------------------------------------------------
1753 ** Fields that should be removed or changed.
1754 **----------------------------------------------------------------
1756 struct ccb *ccb; /* Global CCB */
1757 struct usrcmd user; /* Command from user */
1758 volatile u_char release_stage; /* Synchronisation stage on release */
1761 #define NCB_SCRIPT_PHYS(np,lbl) (np->p_script + offsetof (struct script, lbl))
1762 #define NCB_SCRIPTH_PHYS(np,lbl) (np->p_scripth + offsetof (struct scripth,lbl))
1764 /*==========================================================
1767 ** Script for NCR-Processor.
1769 ** Use ncr_script_fill() to create the variable parts.
1770 ** Use ncr_script_copy_and_bind() to make a copy and
1771 ** bind to physical addresses.
1774 **==========================================================
1776 ** We have to know the offsets of all labels before
1777 ** we reach them (for forward jumps).
1778 ** Therefore we declare a struct here.
1779 ** If you make changes inside the script,
1780 ** DONT FORGET TO CHANGE THE LENGTHS HERE!
1782 **----------------------------------------------------------
1786 ** For HP Zalon/53c720 systems, the Zalon interface
1787 ** between CPU and 53c720 does prefetches, which causes
1788 ** problems with self modifying scripts. The problem
1789 ** is overcome by calling a dummy subroutine after each
1790 ** modification, to force a refetch of the script on
1791 ** return from the subroutine.
1794 #ifdef CONFIG_NCR53C8XX_PREFETCH
1795 #define PREFETCH_FLUSH_CNT 2
1796 #define PREFETCH_FLUSH SCR_CALL, PADDRH (wait_dma),
1798 #define PREFETCH_FLUSH_CNT 0
1799 #define PREFETCH_FLUSH
1803 ** Script fragments which are loaded into the on-chip RAM
1804 ** of 825A, 875 and 895 chips.
1808 ncrcmd startpos [ 1];
1810 ncrcmd select2 [ 9 + PREFETCH_FLUSH_CNT];
1811 ncrcmd loadpos [ 4];
1812 ncrcmd send_ident [ 9];
1813 ncrcmd prepare [ 6];
1814 ncrcmd prepare2 [ 7];
1815 ncrcmd command [ 6];
1816 ncrcmd dispatch [ 32];
1818 ncrcmd no_data [ 17];
1821 ncrcmd msg_in2 [ 16];
1822 ncrcmd msg_bad [ 4];
1824 ncrcmd cleanup [ 6];
1825 ncrcmd complete [ 9];
1826 ncrcmd cleanup_ok [ 8 + PREFETCH_FLUSH_CNT];
1827 ncrcmd cleanup0 [ 1];
1828 #ifndef SCSI_NCR_CCB_DONE_SUPPORT
1829 ncrcmd signal [ 12];
1832 ncrcmd done_pos [ 1];
1833 ncrcmd done_plug [ 2];
1834 ncrcmd done_end [ 7];
1836 ncrcmd save_dp [ 7];
1837 ncrcmd restore_dp [ 5];
1838 ncrcmd disconnect [ 10];
1839 ncrcmd msg_out [ 9];
1840 ncrcmd msg_out_done [ 7];
1842 ncrcmd reselect [ 8];
1843 ncrcmd reselected [ 8];
1844 ncrcmd resel_dsa [ 6 + PREFETCH_FLUSH_CNT];
1845 ncrcmd loadpos1 [ 4];
1846 ncrcmd resel_lun [ 6];
1847 ncrcmd resel_tag [ 6];
1848 ncrcmd jump_to_nexus [ 4 + PREFETCH_FLUSH_CNT];
1849 ncrcmd nexus_indirect [ 4];
1850 ncrcmd resel_notag [ 4];
1851 ncrcmd data_in [MAX_SCATTERL * 4];
1852 ncrcmd data_in2 [ 4];
1853 ncrcmd data_out [MAX_SCATTERL * 4];
1854 ncrcmd data_out2 [ 4];
1858 ** Script fragments which stay in main memory for all chips.
1861 ncrcmd tryloop [MAX_START*2];
1862 ncrcmd tryloop2 [ 2];
1863 #ifdef SCSI_NCR_CCB_DONE_SUPPORT
1864 ncrcmd done_queue [MAX_DONE*5];
1865 ncrcmd done_queue2 [ 2];
1867 ncrcmd select_no_atn [ 8];
1869 ncrcmd skip [ 9 + PREFETCH_FLUSH_CNT];
1871 ncrcmd par_err_data_in [ 6];
1872 ncrcmd par_err_other [ 4];
1873 ncrcmd msg_reject [ 8];
1874 ncrcmd msg_ign_residue [ 24];
1875 ncrcmd msg_extended [ 10];
1876 ncrcmd msg_ext_2 [ 10];
1877 ncrcmd msg_wdtr [ 14];
1878 ncrcmd send_wdtr [ 7];
1879 ncrcmd msg_ext_3 [ 10];
1880 ncrcmd msg_sdtr [ 14];
1881 ncrcmd send_sdtr [ 7];
1882 ncrcmd nego_bad_phase [ 4];
1883 ncrcmd msg_out_abort [ 10];
1884 ncrcmd hdata_in [MAX_SCATTERH * 4];
1885 ncrcmd hdata_in2 [ 2];
1886 ncrcmd hdata_out [MAX_SCATTERH * 4];
1887 ncrcmd hdata_out2 [ 2];
1889 ncrcmd aborttag [ 4];
1891 ncrcmd abort_resel [ 20];
1892 ncrcmd resend_ident [ 4];
1893 ncrcmd clratn_go_on [ 3];
1894 ncrcmd nxtdsp_go_on [ 1];
1895 ncrcmd sdata_in [ 8];
1896 ncrcmd data_io [ 18];
1897 ncrcmd bad_identify [ 12];
1898 ncrcmd bad_i_t_l [ 4];
1899 ncrcmd bad_i_t_l_q [ 4];
1900 ncrcmd bad_target [ 8];
1901 ncrcmd bad_status [ 8];
1902 ncrcmd start_ram [ 4 + PREFETCH_FLUSH_CNT];
1903 ncrcmd start_ram0 [ 4];
1904 ncrcmd sto_restart [ 5];
1905 ncrcmd wait_dma [ 2];
1906 ncrcmd snooptest [ 9];
1907 ncrcmd snoopend [ 2];
1910 /*==========================================================
1913 ** Function headers.
1916 **==========================================================
1919 static void ncr_alloc_ccb (struct ncb *np, u_char tn, u_char ln);
1920 static void ncr_complete (struct ncb *np, struct ccb *cp);
1921 static void ncr_exception (struct ncb *np);
1922 static void ncr_free_ccb (struct ncb *np, struct ccb *cp);
1923 static void ncr_init_ccb (struct ncb *np, struct ccb *cp);
1924 static void ncr_init_tcb (struct ncb *np, u_char tn);
1925 static struct lcb * ncr_alloc_lcb (struct ncb *np, u_char tn, u_char ln);
1926 static struct lcb * ncr_setup_lcb (struct ncb *np, struct scsi_device *sdev);
1927 static void ncr_getclock (struct ncb *np, int mult);
1928 static void ncr_selectclock (struct ncb *np, u_char scntl3);
1929 static struct ccb *ncr_get_ccb (struct ncb *np, struct scsi_cmnd *cmd);
1930 static void ncr_chip_reset (struct ncb *np, int delay);
1931 static void ncr_init (struct ncb *np, int reset, char * msg, u_long code);
1932 static int ncr_int_sbmc (struct ncb *np);
1933 static int ncr_int_par (struct ncb *np);
1934 static void ncr_int_ma (struct ncb *np);
1935 static void ncr_int_sir (struct ncb *np);
1936 static void ncr_int_sto (struct ncb *np);
1937 static void ncr_negotiate (struct ncb* np, struct tcb* tp);
1938 static int ncr_prepare_nego(struct ncb *np, struct ccb *cp, u_char *msgptr);
1940 static void ncr_script_copy_and_bind
1941 (struct ncb *np, ncrcmd *src, ncrcmd *dst, int len);
1942 static void ncr_script_fill (struct script * scr, struct scripth * scripth);
1943 static int ncr_scatter (struct ncb *np, struct ccb *cp, struct scsi_cmnd *cmd);
1944 static void ncr_getsync (struct ncb *np, u_char sfac, u_char *fakp, u_char *scntl3p);
1945 static void ncr_setsync (struct ncb *np, struct ccb *cp, u_char scntl3, u_char sxfer);
1946 static void ncr_setup_tags (struct ncb *np, struct scsi_device *sdev);
1947 static void ncr_setwide (struct ncb *np, struct ccb *cp, u_char wide, u_char ack);
1948 static int ncr_snooptest (struct ncb *np);
1949 static void ncr_timeout (struct ncb *np);
1950 static void ncr_wakeup (struct ncb *np, u_long code);
1951 static void ncr_wakeup_done (struct ncb *np);
1952 static void ncr_start_next_ccb (struct ncb *np, struct lcb * lp, int maxn);
1953 static void ncr_put_start_queue(struct ncb *np, struct ccb *cp);
1955 static void insert_into_waiting_list(struct ncb *np, struct scsi_cmnd *cmd);
1956 static struct scsi_cmnd *retrieve_from_waiting_list(int to_remove, struct ncb *np, struct scsi_cmnd *cmd);
1957 static void process_waiting_list(struct ncb *np, int sts);
1959 #define remove_from_waiting_list(np, cmd) \
1960 retrieve_from_waiting_list(1, (np), (cmd))
1961 #define requeue_waiting_list(np) process_waiting_list((np), DID_OK)
1962 #define reset_waiting_list(np) process_waiting_list((np), DID_RESET)
1964 static inline char *ncr_name (struct ncb *np)
1966 return np->inst_name;
1970 /*==========================================================
1973 ** Scripts for NCR-Processor.
1975 ** Use ncr_script_bind for binding to physical addresses.
1978 **==========================================================
1980 ** NADDR generates a reference to a field of the controller data.
1981 ** PADDR generates a reference to another part of the script.
1982 ** RADDR generates a reference to a script processor register.
1983 ** FADDR generates a reference to a script processor register
1986 **----------------------------------------------------------
1989 #define RELOC_SOFTC 0x40000000
1990 #define RELOC_LABEL 0x50000000
1991 #define RELOC_REGISTER 0x60000000
1993 #define RELOC_KVAR 0x70000000
1995 #define RELOC_LABELH 0x80000000
1996 #define RELOC_MASK 0xf0000000
1998 #define NADDR(label) (RELOC_SOFTC | offsetof(struct ncb, label))
1999 #define PADDR(label) (RELOC_LABEL | offsetof(struct script, label))
2000 #define PADDRH(label) (RELOC_LABELH | offsetof(struct scripth, label))
2001 #define RADDR(label) (RELOC_REGISTER | REG(label))
2002 #define FADDR(label,ofs)(RELOC_REGISTER | ((REG(label))+(ofs)))
2004 #define KVAR(which) (RELOC_KVAR | (which))
2008 #define SCRIPT_KVAR_JIFFIES (0)
2009 #define SCRIPT_KVAR_FIRST SCRIPT_KVAR_JIFFIES
2010 #define SCRIPT_KVAR_LAST SCRIPT_KVAR_JIFFIES
2012 * Kernel variables referenced in the scripts.
2013 * THESE MUST ALL BE ALIGNED TO A 4-BYTE BOUNDARY.
2015 static void *script_kvars[] __initdata =
2016 { (void *)&jiffies };
2019 static struct script script0 __initdata = {
2020 /*--------------------------< START >-----------------------*/ {
2022 ** This NOP will be patched with LED ON
2023 ** SCR_REG_REG (gpreg, SCR_AND, 0xfe)
2030 SCR_FROM_REG (ctest2),
2033 ** Then jump to a certain point in tryloop.
2034 ** Due to the lack of indirect addressing the code
2035 ** is self modifying here.
2038 }/*-------------------------< STARTPOS >--------------------*/,{
2041 }/*-------------------------< SELECT >----------------------*/,{
2043 ** DSA contains the address of a scheduled
2046 ** SCRATCHA contains the address of the script,
2047 ** which starts the next entry.
2049 ** Set Initiator mode.
2051 ** (Target mode is left as an exercise for the reader)
2056 SCR_LOAD_REG (HS_REG, HS_SELECTING),
2060 ** And try to select this target.
2062 SCR_SEL_TBL_ATN ^ offsetof (struct dsb, select),
2065 }/*-------------------------< SELECT2 >----------------------*/,{
2067 ** Now there are 4 possibilities:
2069 ** (1) The ncr loses arbitration.
2070 ** This is ok, because it will try again,
2071 ** when the bus becomes idle.
2072 ** (But beware of the timeout function!)
2074 ** (2) The ncr is reselected.
2075 ** Then the script processor takes the jump
2076 ** to the RESELECT label.
2078 ** (3) The ncr wins arbitration.
2079 ** Then it will execute SCRIPTS instruction until
2080 ** the next instruction that checks SCSI phase.
2081 ** Then will stop and wait for selection to be
2082 ** complete or selection time-out to occur.
2083 ** As a result the SCRIPTS instructions until
2084 ** LOADPOS + 2 should be executed in parallel with
2085 ** the SCSI core performing selection.
2089 ** The MESSAGE_REJECT problem seems to be due to a selection
2091 ** Wait immediately for the selection to complete.
2092 ** (2.5x behaves so)
2094 SCR_JUMPR ^ IFFALSE (WHEN (SCR_MSG_OUT)),
2098 ** Next time use the next slot.
2104 ** The ncr doesn't have an indirect load
2105 ** or store command. So we have to
2106 ** copy part of the control block to a
2107 ** fixed place, where we can access it.
2109 ** We patch the address part of a
2110 ** COPY command with the DSA-register.
2116 ** Flush script prefetch if required
2120 ** then we do the actual copy.
2122 SCR_COPY (sizeof (struct head)),
2124 ** continued after the next label ...
2126 }/*-------------------------< LOADPOS >---------------------*/,{
2130 ** Wait for the next phase or the selection
2131 ** to complete or time-out.
2133 SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_OUT)),
2136 }/*-------------------------< SEND_IDENT >----------------------*/,{
2138 ** Selection complete.
2139 ** Send the IDENTIFY and SIMPLE_TAG messages
2140 ** (and the EXTENDED_SDTR message)
2142 SCR_MOVE_TBL ^ SCR_MSG_OUT,
2143 offsetof (struct dsb, smsg),
2144 SCR_JUMP ^ IFTRUE (WHEN (SCR_MSG_OUT)),
2145 PADDRH (resend_ident),
2146 SCR_LOAD_REG (scratcha, 0x80),
2151 }/*-------------------------< PREPARE >----------------------*/,{
2153 ** load the savep (saved pointer) into
2154 ** the TEMP register (actual pointer)
2157 NADDR (header.savep),
2160 ** Initialize the status registers
2163 NADDR (header.status),
2165 }/*-------------------------< PREPARE2 >---------------------*/,{
2167 ** Initialize the msgout buffer with a NOOP message.
2169 SCR_LOAD_REG (scratcha, NOP),
2180 ** Anticipate the COMMAND phase.
2181 ** This is the normal case for initial selection.
2183 SCR_JUMP ^ IFFALSE (WHEN (SCR_COMMAND)),
2186 }/*-------------------------< COMMAND >--------------------*/,{
2188 ** ... and send the command
2190 SCR_MOVE_TBL ^ SCR_COMMAND,
2191 offsetof (struct dsb, cmd),
2193 ** If status is still HS_NEGOTIATE, negotiation failed.
2194 ** We check this here, since we want to do that
2197 SCR_FROM_REG (HS_REG),
2199 SCR_INT ^ IFTRUE (DATA (HS_NEGOTIATE)),
2202 }/*-----------------------< DISPATCH >----------------------*/,{
2204 ** MSG_IN is the only phase that shall be
2205 ** entered at least once for each (re)selection.
2206 ** So we test it first.
2208 SCR_JUMP ^ IFTRUE (WHEN (SCR_MSG_IN)),
2211 SCR_RETURN ^ IFTRUE (IF (SCR_DATA_OUT)),
2214 ** DEL 397 - 53C875 Rev 3 - Part Number 609-0392410 - ITEM 4.
2215 ** Possible data corruption during Memory Write and Invalidate.
2216 ** This work-around resets the addressing logic prior to the
2217 ** start of the first MOVE of a DATA IN phase.
2218 ** (See Documentation/scsi/ncr53c8xx.txt for more information)
2220 SCR_JUMPR ^ IFFALSE (IF (SCR_DATA_IN)),
2227 SCR_JUMP ^ IFTRUE (IF (SCR_STATUS)),
2229 SCR_JUMP ^ IFTRUE (IF (SCR_COMMAND)),
2231 SCR_JUMP ^ IFTRUE (IF (SCR_MSG_OUT)),
2234 ** Discard one illegal phase byte, if required.
2236 SCR_LOAD_REG (scratcha, XE_BAD_PHASE),
2241 SCR_JUMPR ^ IFFALSE (IF (SCR_ILG_OUT)),
2243 SCR_MOVE_ABS (1) ^ SCR_ILG_OUT,
2245 SCR_JUMPR ^ IFFALSE (IF (SCR_ILG_IN)),
2247 SCR_MOVE_ABS (1) ^ SCR_ILG_IN,
2252 }/*-------------------------< CLRACK >----------------------*/,{
2254 ** Terminate possible pending message phase.
2261 }/*-------------------------< NO_DATA >--------------------*/,{
2263 ** The target wants to tranfer too much data
2264 ** or in the wrong direction.
2265 ** Remember that in extended error.
2267 SCR_LOAD_REG (scratcha, XE_EXTRA_DATA),
2273 ** Discard one data byte, if required.
2275 SCR_JUMPR ^ IFFALSE (WHEN (SCR_DATA_OUT)),
2277 SCR_MOVE_ABS (1) ^ SCR_DATA_OUT,
2279 SCR_JUMPR ^ IFFALSE (IF (SCR_DATA_IN)),
2281 SCR_MOVE_ABS (1) ^ SCR_DATA_IN,
2284 ** .. and repeat as required.
2291 }/*-------------------------< STATUS >--------------------*/,{
2295 SCR_MOVE_ABS (1) ^ SCR_STATUS,
2298 ** save status to scsi_status.
2299 ** mark as complete.
2301 SCR_TO_REG (SS_REG),
2303 SCR_LOAD_REG (HS_REG, HS_COMPLETE),
2307 }/*-------------------------< MSG_IN >--------------------*/,{
2309 ** Get the first byte of the message
2310 ** and save it to SCRATCHA.
2312 ** The script processor doesn't negate the
2313 ** ACK signal after this transfer.
2315 SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
2317 }/*-------------------------< MSG_IN2 >--------------------*/,{
2319 ** Handle this message.
2321 SCR_JUMP ^ IFTRUE (DATA (COMMAND_COMPLETE)),
2323 SCR_JUMP ^ IFTRUE (DATA (DISCONNECT)),
2325 SCR_JUMP ^ IFTRUE (DATA (SAVE_POINTERS)),
2327 SCR_JUMP ^ IFTRUE (DATA (RESTORE_POINTERS)),
2329 SCR_JUMP ^ IFTRUE (DATA (EXTENDED_MESSAGE)),
2330 PADDRH (msg_extended),
2331 SCR_JUMP ^ IFTRUE (DATA (NOP)),
2333 SCR_JUMP ^ IFTRUE (DATA (MESSAGE_REJECT)),
2334 PADDRH (msg_reject),
2335 SCR_JUMP ^ IFTRUE (DATA (IGNORE_WIDE_RESIDUE)),
2336 PADDRH (msg_ign_residue),
2338 ** Rest of the messages left as
2341 ** Unimplemented messages:
2342 ** fall through to MSG_BAD.
2344 }/*-------------------------< MSG_BAD >------------------*/,{
2346 ** unimplemented message - reject it.
2350 SCR_LOAD_REG (scratcha, MESSAGE_REJECT),
2352 }/*-------------------------< SETMSG >----------------------*/,{
2360 }/*-------------------------< CLEANUP >-------------------*/,{
2362 ** dsa: Pointer to ccb
2363 ** or xxxxxxFF (no ccb)
2365 ** HS_REG: Host-Status (<>0!)
2369 SCR_JUMP ^ IFTRUE (DATA (0xff)),
2373 ** complete the cleanup.
2378 }/*-------------------------< COMPLETE >-----------------*/,{
2380 ** Complete message.
2382 ** Copy TEMP register to LASTP in header.
2386 NADDR (header.lastp),
2388 ** When we terminate the cycle by clearing ACK,
2389 ** the target may disconnect immediately.
2391 ** We don't want to be told of an
2392 ** "unexpected disconnect",
2393 ** so we disable this feature.
2395 SCR_REG_REG (scntl2, SCR_AND, 0x7f),
2398 ** Terminate cycle ...
2400 SCR_CLR (SCR_ACK|SCR_ATN),
2403 ** ... and wait for the disconnect.
2407 }/*-------------------------< CLEANUP_OK >----------------*/,{
2409 ** Save host status to header.
2413 NADDR (header.status),
2415 ** and copy back the header to the ccb.
2421 ** Flush script prefetch if required
2424 SCR_COPY (sizeof (struct head)),
2426 }/*-------------------------< CLEANUP0 >--------------------*/,{
2428 }/*-------------------------< SIGNAL >----------------------*/,{
2430 ** if job not completed ...
2432 SCR_FROM_REG (HS_REG),
2435 ** ... start the next command.
2437 SCR_JUMP ^ IFTRUE (MASK (0, (HS_DONEMASK|HS_SKIPMASK))),
2440 ** If command resulted in not GOOD status,
2441 ** call the C code if needed.
2443 SCR_FROM_REG (SS_REG),
2445 SCR_CALL ^ IFFALSE (DATA (S_GOOD)),
2446 PADDRH (bad_status),
2448 #ifndef SCSI_NCR_CCB_DONE_SUPPORT
2451 ** ... signal completion to the host
2456 ** Auf zu neuen Schandtaten!
2461 #else /* defined SCSI_NCR_CCB_DONE_SUPPORT */
2464 ** ... signal completion to the host
2467 }/*------------------------< DONE_POS >---------------------*/,{
2468 PADDRH (done_queue),
2469 }/*------------------------< DONE_PLUG >--------------------*/,{
2472 }/*------------------------< DONE_END >---------------------*/,{
2481 #endif /* SCSI_NCR_CCB_DONE_SUPPORT */
2483 }/*-------------------------< SAVE_DP >------------------*/,{
2486 ** Copy TEMP register to SAVEP in header.
2490 NADDR (header.savep),
2495 }/*-------------------------< RESTORE_DP >---------------*/,{
2497 ** RESTORE_DP message:
2498 ** Copy SAVEP in header to TEMP register.
2501 NADDR (header.savep),
2506 }/*-------------------------< DISCONNECT >---------------*/,{
2508 ** DISCONNECTing ...
2510 ** disable the "unexpected disconnect" feature,
2511 ** and remove the ACK signal.
2513 SCR_REG_REG (scntl2, SCR_AND, 0x7f),
2515 SCR_CLR (SCR_ACK|SCR_ATN),
2518 ** Wait for the disconnect.
2523 ** Status is: DISCONNECTED.
2525 SCR_LOAD_REG (HS_REG, HS_DISCONNECT),
2530 }/*-------------------------< MSG_OUT >-------------------*/,{
2532 ** The target requests a message.
2534 SCR_MOVE_ABS (1) ^ SCR_MSG_OUT,
2540 ** If it was no ABORT message ...
2542 SCR_JUMP ^ IFTRUE (DATA (ABORT_TASK_SET)),
2543 PADDRH (msg_out_abort),
2545 ** ... wait for the next phase
2546 ** if it's a message out, send it again, ...
2548 SCR_JUMP ^ IFTRUE (WHEN (SCR_MSG_OUT)),
2550 }/*-------------------------< MSG_OUT_DONE >--------------*/,{
2552 ** ... else clear the message ...
2554 SCR_LOAD_REG (scratcha, NOP),
2560 ** ... and process the next phase
2564 }/*-------------------------< IDLE >------------------------*/,{
2567 ** Wait for reselect.
2568 ** This NOP will be patched with LED OFF
2569 ** SCR_REG_REG (gpreg, SCR_OR, 0x01)
2573 }/*-------------------------< RESELECT >--------------------*/,{
2575 ** make the DSA invalid.
2577 SCR_LOAD_REG (dsa, 0xff),
2581 SCR_LOAD_REG (HS_REG, HS_IN_RESELECT),
2584 ** Sleep waiting for a reselection.
2585 ** If SIGP is set, special treatment.
2587 ** Zu allem bereit ..
2591 }/*-------------------------< RESELECTED >------------------*/,{
2593 ** This NOP will be patched with LED ON
2594 ** SCR_REG_REG (gpreg, SCR_AND, 0xfe)
2599 ** ... zu nichts zu gebrauchen ?
2601 ** load the target id into the SFBR
2602 ** and jump to the control block.
2604 ** Look at the declarations of
2609 ** to understand what's going on.
2611 SCR_REG_SFBR (ssid, SCR_AND, 0x8F),
2618 }/*-------------------------< RESEL_DSA >-------------------*/,{
2620 ** Ack the IDENTIFY or TAG previously received.
2625 ** The ncr doesn't have an indirect load
2626 ** or store command. So we have to
2627 ** copy part of the control block to a
2628 ** fixed place, where we can access it.
2630 ** We patch the address part of a
2631 ** COPY command with the DSA-register.
2637 ** Flush script prefetch if required
2641 ** then we do the actual copy.
2643 SCR_COPY (sizeof (struct head)),
2645 ** continued after the next label ...
2648 }/*-------------------------< LOADPOS1 >-------------------*/,{
2652 ** The DSA contains the data structure address.
2657 }/*-------------------------< RESEL_LUN >-------------------*/,{
2659 ** come back to this point
2660 ** to get an IDENTIFY message
2661 ** Wait for a msg_in phase.
2663 SCR_INT ^ IFFALSE (WHEN (SCR_MSG_IN)),
2664 SIR_RESEL_NO_MSG_IN,
2667 ** Read the data directly from the BUS DATA lines.
2668 ** This helps to support very old SCSI devices that
2669 ** may reselect without sending an IDENTIFY.
2671 SCR_FROM_REG (sbdl),
2674 ** It should be an Identify message.
2678 }/*-------------------------< RESEL_TAG >-------------------*/,{
2680 ** Read IDENTIFY + SIMPLE + TAG using a single MOVE.
2681 ** Agressive optimization, is'nt it?
2682 ** No need to test the SIMPLE TAG message, since the
2683 ** driver only supports conformant devices for tags. ;-)
2685 SCR_MOVE_ABS (3) ^ SCR_MSG_IN,
2688 ** Read the TAG from the SIDL.
2689 ** Still an aggressive optimization. ;-)
2690 ** Compute the CCB indirect jump address which
2691 ** is (#TAG*2 & 0xfc) due to tag numbering using
2692 ** 1,3,5..MAXTAGS*2+1 actual values.
2694 SCR_REG_SFBR (sidl, SCR_SHL, 0),
2696 SCR_SFBR_REG (temp, SCR_AND, 0xfc),
2698 }/*-------------------------< JUMP_TO_NEXUS >-------------------*/,{
2701 PADDR (nexus_indirect),
2703 ** Flush script prefetch if required
2707 }/*-------------------------< NEXUS_INDIRECT >-------------------*/,{
2712 }/*-------------------------< RESEL_NOTAG >-------------------*/,{
2715 ** Read an throw away the IDENTIFY.
2717 SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
2720 PADDR (jump_to_nexus),
2721 }/*-------------------------< DATA_IN >--------------------*/,{
2723 ** Because the size depends on the
2724 ** #define MAX_SCATTERL parameter,
2725 ** it is filled in at runtime.
2727 ** ##===========< i=0; i<MAX_SCATTERL >=========
2728 ** || SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_IN)),
2729 ** || PADDR (dispatch),
2730 ** || SCR_MOVE_TBL ^ SCR_DATA_IN,
2731 ** || offsetof (struct dsb, data[ i]),
2732 ** ##==========================================
2734 **---------------------------------------------------------
2737 }/*-------------------------< DATA_IN2 >-------------------*/,{
2742 }/*-------------------------< DATA_OUT >--------------------*/,{
2744 ** Because the size depends on the
2745 ** #define MAX_SCATTERL parameter,
2746 ** it is filled in at runtime.
2748 ** ##===========< i=0; i<MAX_SCATTERL >=========
2749 ** || SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_OUT)),
2750 ** || PADDR (dispatch),
2751 ** || SCR_MOVE_TBL ^ SCR_DATA_OUT,
2752 ** || offsetof (struct dsb, data[ i]),
2753 ** ##==========================================
2755 **---------------------------------------------------------
2758 }/*-------------------------< DATA_OUT2 >-------------------*/,{
2763 }/*--------------------------------------------------------*/
2766 static struct scripth scripth0 __initdata = {
2767 /*-------------------------< TRYLOOP >---------------------*/{
2769 ** Start the next entry.
2770 ** Called addresses point to the launch script in the CCB.
2771 ** They are patched by the main processor.
2773 ** Because the size depends on the
2774 ** #define MAX_START parameter, it is filled
2777 **-----------------------------------------------------------
2779 ** ##===========< I=0; i<MAX_START >===========
2782 ** ##==========================================
2784 **-----------------------------------------------------------
2787 }/*------------------------< TRYLOOP2 >---------------------*/,{
2791 #ifdef SCSI_NCR_CCB_DONE_SUPPORT
2793 }/*------------------------< DONE_QUEUE >-------------------*/,{
2795 ** Copy the CCB address to the next done entry.
2796 ** Because the size depends on the
2797 ** #define MAX_DONE parameter, it is filled
2800 **-----------------------------------------------------------
2802 ** ##===========< I=0; i<MAX_DONE >===========
2803 ** || SCR_COPY (sizeof(struct ccb *),
2804 ** || NADDR (header.cp),
2805 ** || NADDR (ccb_done[i]),
2807 ** || PADDR (done_end),
2808 ** ##==========================================
2810 **-----------------------------------------------------------
2813 }/*------------------------< DONE_QUEUE2 >------------------*/,{
2815 PADDRH (done_queue),
2817 #endif /* SCSI_NCR_CCB_DONE_SUPPORT */
2818 }/*------------------------< SELECT_NO_ATN >-----------------*/,{
2820 ** Set Initiator mode.
2821 ** And try to select this target without ATN.
2826 SCR_LOAD_REG (HS_REG, HS_SELECTING),
2828 SCR_SEL_TBL ^ offsetof (struct dsb, select),
2833 }/*-------------------------< CANCEL >------------------------*/,{
2835 SCR_LOAD_REG (scratcha, HS_ABORTED),
2839 }/*-------------------------< SKIP >------------------------*/,{
2840 SCR_LOAD_REG (scratcha, 0),
2843 ** This entry has been canceled.
2844 ** Next time use the next slot.
2850 ** The ncr doesn't have an indirect load
2851 ** or store command. So we have to
2852 ** copy part of the control block to a
2853 ** fixed place, where we can access it.
2855 ** We patch the address part of a
2856 ** COPY command with the DSA-register.
2862 ** Flush script prefetch if required
2866 ** then we do the actual copy.
2868 SCR_COPY (sizeof (struct head)),
2870 ** continued after the next label ...
2872 }/*-------------------------< SKIP2 >---------------------*/,{
2876 ** Initialize the status registers
2879 NADDR (header.status),
2882 ** Force host status.
2884 SCR_FROM_REG (scratcha),
2886 SCR_JUMPR ^ IFFALSE (MASK (0, HS_DONEMASK)),
2888 SCR_REG_REG (HS_REG, SCR_OR, HS_SKIPMASK),
2892 SCR_TO_REG (HS_REG),
2894 SCR_LOAD_REG (SS_REG, S_GOOD),
2899 },/*-------------------------< PAR_ERR_DATA_IN >---------------*/{
2901 ** Ignore all data in byte, until next phase
2903 SCR_JUMP ^ IFFALSE (WHEN (SCR_DATA_IN)),
2904 PADDRH (par_err_other),
2905 SCR_MOVE_ABS (1) ^ SCR_DATA_IN,
2909 },/*-------------------------< PAR_ERR_OTHER >------------------*/{
2913 SCR_REG_REG (PS_REG, SCR_ADD, 0x01),
2916 ** jump to dispatcher.
2920 }/*-------------------------< MSG_REJECT >---------------*/,{
2922 ** If a negotiation was in progress,
2923 ** negotiation failed.
2924 ** Otherwise, let the C code print
2927 SCR_FROM_REG (HS_REG),
2929 SCR_INT ^ IFFALSE (DATA (HS_NEGOTIATE)),
2930 SIR_REJECT_RECEIVED,
2931 SCR_INT ^ IFTRUE (DATA (HS_NEGOTIATE)),
2936 }/*-------------------------< MSG_IGN_RESIDUE >----------*/,{
2942 SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)),
2945 ** get residue size.
2947 SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
2950 ** Size is 0 .. ignore message.
2952 SCR_JUMP ^ IFTRUE (DATA (0)),
2955 ** Size is not 1 .. have to interrupt.
2957 SCR_JUMPR ^ IFFALSE (DATA (1)),
2960 ** Check for residue byte in swide register
2962 SCR_FROM_REG (scntl2),
2964 SCR_JUMPR ^ IFFALSE (MASK (WSR, WSR)),
2967 ** There IS data in the swide register.
2970 SCR_REG_REG (scntl2, SCR_OR, WSR),
2975 ** Load again the size to the sfbr register.
2977 SCR_FROM_REG (scratcha),
2984 }/*-------------------------< MSG_EXTENDED >-------------*/,{
2990 SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)),
2995 SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
2999 SCR_JUMP ^ IFTRUE (DATA (3)),
3001 SCR_JUMP ^ IFFALSE (DATA (2)),
3003 }/*-------------------------< MSG_EXT_2 >----------------*/,{
3006 SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)),
3009 ** get extended message code.
3011 SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
3013 SCR_JUMP ^ IFTRUE (DATA (EXTENDED_WDTR)),
3016 ** unknown extended message
3020 }/*-------------------------< MSG_WDTR >-----------------*/,{
3023 SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)),
3026 ** get data bus width
3028 SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
3031 ** let the host do the real work.
3036 ** let the target fetch our answer.
3042 SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_OUT)),
3043 PADDRH (nego_bad_phase),
3045 }/*-------------------------< SEND_WDTR >----------------*/,{
3047 ** Send the EXTENDED_WDTR
3049 SCR_MOVE_ABS (4) ^ SCR_MSG_OUT,
3055 PADDR (msg_out_done),
3057 }/*-------------------------< MSG_EXT_3 >----------------*/,{
3060 SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)),
3063 ** get extended message code.
3065 SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
3067 SCR_JUMP ^ IFTRUE (DATA (EXTENDED_SDTR)),
3070 ** unknown extended message
3075 }/*-------------------------< MSG_SDTR >-----------------*/,{
3078 SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)),
3081 ** get period and offset
3083 SCR_MOVE_ABS (2) ^ SCR_MSG_IN,
3086 ** let the host do the real work.
3091 ** let the target fetch our answer.
3097 SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_OUT)),
3098 PADDRH (nego_bad_phase),
3100 }/*-------------------------< SEND_SDTR >-------------*/,{
3102 ** Send the EXTENDED_SDTR
3104 SCR_MOVE_ABS (5) ^ SCR_MSG_OUT,
3110 PADDR (msg_out_done),
3112 }/*-------------------------< NEGO_BAD_PHASE >------------*/,{
3118 }/*-------------------------< MSG_OUT_ABORT >-------------*/,{
3120 ** After ABORT message,
3122 ** expect an immediate disconnect, ...
3124 SCR_REG_REG (scntl2, SCR_AND, 0x7f),
3126 SCR_CLR (SCR_ACK|SCR_ATN),
3131 ** ... and set the status to "ABORTED"
3133 SCR_LOAD_REG (HS_REG, HS_ABORTED),
3138 }/*-------------------------< HDATA_IN >-------------------*/,{
3140 ** Because the size depends on the
3141 ** #define MAX_SCATTERH parameter,
3142 ** it is filled in at runtime.
3144 ** ##==< i=MAX_SCATTERL; i<MAX_SCATTERL+MAX_SCATTERH >==
3145 ** || SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_IN)),
3146 ** || PADDR (dispatch),
3147 ** || SCR_MOVE_TBL ^ SCR_DATA_IN,
3148 ** || offsetof (struct dsb, data[ i]),
3149 ** ##===================================================
3151 **---------------------------------------------------------
3154 }/*-------------------------< HDATA_IN2 >------------------*/,{
3158 }/*-------------------------< HDATA_OUT >-------------------*/,{
3160 ** Because the size depends on the
3161 ** #define MAX_SCATTERH parameter,
3162 ** it is filled in at runtime.
3164 ** ##==< i=MAX_SCATTERL; i<MAX_SCATTERL+MAX_SCATTERH >==
3165 ** || SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_OUT)),
3166 ** || PADDR (dispatch),
3167 ** || SCR_MOVE_TBL ^ SCR_DATA_OUT,
3168 ** || offsetof (struct dsb, data[ i]),
3169 ** ##===================================================
3171 **---------------------------------------------------------
3174 }/*-------------------------< HDATA_OUT2 >------------------*/,{
3178 }/*-------------------------< RESET >----------------------*/,{
3180 ** Send a TARGET_RESET message if bad IDENTIFY
3181 ** received on reselection.
3183 SCR_LOAD_REG (scratcha, ABORT_TASK),
3186 PADDRH (abort_resel),
3187 }/*-------------------------< ABORTTAG >-------------------*/,{
3189 ** Abort a wrong tag received on reselection.
3191 SCR_LOAD_REG (scratcha, ABORT_TASK),
3194 PADDRH (abort_resel),
3195 }/*-------------------------< ABORT >----------------------*/,{
3197 ** Abort a reselection when no active CCB.
3199 SCR_LOAD_REG (scratcha, ABORT_TASK_SET),
3201 }/*-------------------------< ABORT_RESEL >----------------*/,{
3211 ** we expect an immediate disconnect
3213 SCR_REG_REG (scntl2, SCR_AND, 0x7f),
3215 SCR_MOVE_ABS (1) ^ SCR_MSG_OUT,
3220 SCR_CLR (SCR_ACK|SCR_ATN),
3226 }/*-------------------------< RESEND_IDENT >-------------------*/,{
3228 ** The target stays in MSG OUT phase after having acked
3229 ** Identify [+ Tag [+ Extended message ]]. Targets shall
3230 ** behave this way on parity error.
3231 ** We must send it again all the messages.
3233 SCR_SET (SCR_ATN), /* Shall be asserted 2 deskew delays before the */
3234 0, /* 1rst ACK = 90 ns. Hope the NCR is'nt too fast */
3237 }/*-------------------------< CLRATN_GO_ON >-------------------*/,{
3241 }/*-------------------------< NXTDSP_GO_ON >-------------------*/,{
3243 }/*-------------------------< SDATA_IN >-------------------*/,{
3244 SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_IN)),
3246 SCR_MOVE_TBL ^ SCR_DATA_IN,
3247 offsetof (struct dsb, sense),
3252 }/*-------------------------< DATA_IO >--------------------*/,{
3254 ** We jump here if the data direction was unknown at the
3255 ** time we had to queue the command to the scripts processor.
3256 ** Pointers had been set as follow in this situation:
3257 ** savep --> DATA_IO
3258 ** lastp --> start pointer when DATA_IN
3259 ** goalp --> goal pointer when DATA_IN
3260 ** wlastp --> start pointer when DATA_OUT
3261 ** wgoalp --> goal pointer when DATA_OUT
3262 ** This script sets savep/lastp/goalp according to the
3263 ** direction chosen by the target.
3265 SCR_JUMPR ^ IFTRUE (WHEN (SCR_DATA_OUT)),
3268 ** Direction is DATA IN.
3269 ** Warning: we jump here, even when phase is DATA OUT.
3272 NADDR (header.lastp),
3273 NADDR (header.savep),
3276 ** Jump to the SCRIPTS according to actual direction.
3279 NADDR (header.savep),
3284 ** Direction is DATA OUT.
3287 NADDR (header.wlastp),
3288 NADDR (header.lastp),
3290 NADDR (header.wgoalp),
3291 NADDR (header.goalp),
3294 }/*-------------------------< BAD_IDENTIFY >---------------*/,{
3296 ** If message phase but not an IDENTIFY,
3297 ** get some help from the C code.
3298 ** Old SCSI device may behave so.
3300 SCR_JUMPR ^ IFTRUE (MASK (0x80, 0x80)),
3303 SIR_RESEL_NO_IDENTIFY,
3307 ** Message is an IDENTIFY, but lun is unknown.
3308 ** Read the message, since we got it directly
3309 ** from the SCSI BUS data lines.
3310 ** Signal problem to C code for logging the event.
3311 ** Send an ABORT_TASK_SET to clear all pending tasks.
3315 SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
3319 }/*-------------------------< BAD_I_T_L >------------------*/,{
3321 ** We donnot have a task for that I_T_L.
3322 ** Signal problem to C code for logging the event.
3323 ** Send an ABORT_TASK_SET message.
3326 SIR_RESEL_BAD_I_T_L,
3329 }/*-------------------------< BAD_I_T_L_Q >----------------*/,{
3331 ** We donnot have a task that matches the tag.
3332 ** Signal problem to C code for logging the event.
3333 ** Send an ABORT_TASK message.
3336 SIR_RESEL_BAD_I_T_L_Q,
3339 }/*-------------------------< BAD_TARGET >-----------------*/,{
3341 ** We donnot know the target that reselected us.
3342 ** Grab the first message if any (IDENTIFY).
3343 ** Signal problem to C code for logging the event.
3344 ** TARGET_RESET message.
3347 SIR_RESEL_BAD_TARGET,
3348 SCR_JUMPR ^ IFFALSE (WHEN (SCR_MSG_IN)),
3350 SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
3354 }/*-------------------------< BAD_STATUS >-----------------*/,{
3356 ** If command resulted in either QUEUE FULL,
3357 ** CHECK CONDITION or COMMAND TERMINATED,
3360 SCR_INT ^ IFTRUE (DATA (S_QUEUE_FULL)),
3362 SCR_INT ^ IFTRUE (DATA (S_CHECK_COND)),
3364 SCR_INT ^ IFTRUE (DATA (S_TERMINATED)),
3368 }/*-------------------------< START_RAM >-------------------*/,{
3370 ** Load the script into on-chip RAM,
3371 ** and jump to start point.
3375 PADDRH (start_ram0),
3377 ** Flush script prefetch if required
3380 SCR_COPY (sizeof (struct script)),
3381 }/*-------------------------< START_RAM0 >--------------------*/,{
3386 }/*-------------------------< STO_RESTART >-------------------*/,{
3389 ** Repair start queue (e.g. next time use the next slot)
3390 ** and jump to start point.
3397 }/*-------------------------< WAIT_DMA >-------------------*/,{
3399 ** For HP Zalon/53c720 systems, the Zalon interface
3400 ** between CPU and 53c720 does prefetches, which causes
3401 ** problems with self modifying scripts. The problem
3402 ** is overcome by calling a dummy subroutine after each
3403 ** modification, to force a refetch of the script on
3404 ** return from the subroutine.
3408 }/*-------------------------< SNOOPTEST >-------------------*/,{
3410 ** Read the variable.
3416 ** Write the variable.
3422 ** Read back the variable.
3427 }/*-------------------------< SNOOPEND >-------------------*/,{
3433 }/*--------------------------------------------------------*/
3436 /*==========================================================
3439 ** Fill in #define dependent parts of the script
3442 **==========================================================
3445 void __init ncr_script_fill (struct script * scr, struct scripth * scrh)
3451 for (i=0; i<MAX_START; i++) {
3456 BUG_ON((u_long)p != (u_long)&scrh->tryloop + sizeof (scrh->tryloop));
3458 #ifdef SCSI_NCR_CCB_DONE_SUPPORT
3460 p = scrh->done_queue;
3461 for (i = 0; i<MAX_DONE; i++) {
3462 *p++ =SCR_COPY (sizeof(struct ccb *));
3463 *p++ =NADDR (header.cp);
3464 *p++ =NADDR (ccb_done[i]);
3466 *p++ =PADDR (done_end);
3469 BUG_ON((u_long)p != (u_long)&scrh->done_queue+sizeof(scrh->done_queue));
3471 #endif /* SCSI_NCR_CCB_DONE_SUPPORT */
3474 for (i=0; i<MAX_SCATTERH; i++) {
3475 *p++ =SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_IN));
3476 *p++ =PADDR (dispatch);
3477 *p++ =SCR_MOVE_TBL ^ SCR_DATA_IN;
3478 *p++ =offsetof (struct dsb, data[i]);
3481 BUG_ON((u_long)p != (u_long)&scrh->hdata_in + sizeof (scrh->hdata_in));
3484 for (i=MAX_SCATTERH; i<MAX_SCATTERH+MAX_SCATTERL; i++) {
3485 *p++ =SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_IN));
3486 *p++ =PADDR (dispatch);
3487 *p++ =SCR_MOVE_TBL ^ SCR_DATA_IN;
3488 *p++ =offsetof (struct dsb, data[i]);
3491 BUG_ON((u_long)p != (u_long)&scr->data_in + sizeof (scr->data_in));
3493 p = scrh->hdata_out;
3494 for (i=0; i<MAX_SCATTERH; i++) {
3495 *p++ =SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_OUT));
3496 *p++ =PADDR (dispatch);
3497 *p++ =SCR_MOVE_TBL ^ SCR_DATA_OUT;
3498 *p++ =offsetof (struct dsb, data[i]);
3501 BUG_ON((u_long)p != (u_long)&scrh->hdata_out + sizeof (scrh->hdata_out));
3504 for (i=MAX_SCATTERH; i<MAX_SCATTERH+MAX_SCATTERL; i++) {
3505 *p++ =SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_OUT));
3506 *p++ =PADDR (dispatch);
3507 *p++ =SCR_MOVE_TBL ^ SCR_DATA_OUT;
3508 *p++ =offsetof (struct dsb, data[i]);
3511 BUG_ON((u_long) p != (u_long)&scr->data_out + sizeof (scr->data_out));
3514 /*==========================================================
3517 ** Copy and rebind a script.
3520 **==========================================================
3524 ncr_script_copy_and_bind (struct ncb *np, ncrcmd *src, ncrcmd *dst, int len)
3526 ncrcmd opcode, new, old, tmp1, tmp2;
3527 ncrcmd *start, *end;
3537 *dst++ = cpu_to_scr(opcode);
3540 ** If we forget to change the length
3541 ** in struct script, a field will be
3542 ** padded with 0. This is an illegal
3547 printk (KERN_ERR "%s: ERROR0 IN SCRIPT at %d.\n",
3548 ncr_name(np), (int) (src-start-1));
3552 if (DEBUG_FLAGS & DEBUG_SCRIPT)
3553 printk (KERN_DEBUG "%p: <%x>\n",
3554 (src-1), (unsigned)opcode);
3557 ** We don't have to decode ALL commands
3559 switch (opcode >> 28) {
3563 ** COPY has TWO arguments.
3568 if ((tmp1 & RELOC_MASK) == RELOC_KVAR)
3573 if ((tmp2 & RELOC_MASK) == RELOC_KVAR)
3576 if ((tmp1 ^ tmp2) & 3) {
3577 printk (KERN_ERR"%s: ERROR1 IN SCRIPT at %d.\n",
3578 ncr_name(np), (int) (src-start-1));
3582 ** If PREFETCH feature not enabled, remove
3583 ** the NO FLUSH bit if present.
3585 if ((opcode & SCR_NO_FLUSH) && !(np->features & FE_PFEN)) {
3586 dst[-1] = cpu_to_scr(opcode & ~SCR_NO_FLUSH);
3593 ** MOVE (absolute address)
3601 ** don't relocate if relative :-)
3603 if (opcode & 0x00800000)
3625 switch (old & RELOC_MASK) {
3626 case RELOC_REGISTER:
3627 new = (old & ~RELOC_MASK) + np->paddr;
3630 new = (old & ~RELOC_MASK) + np->p_script;
3633 new = (old & ~RELOC_MASK) + np->p_scripth;
3636 new = (old & ~RELOC_MASK) + np->p_ncb;
3640 if (((old & ~RELOC_MASK) <
3641 SCRIPT_KVAR_FIRST) ||
3642 ((old & ~RELOC_MASK) >
3644 panic("ncr KVAR out of range");
3645 new = vtophys(script_kvars[old &
3650 /* Don't relocate a 0 address. */
3657 panic("ncr_script_copy_and_bind: weird relocation %x\n", old);
3661 *dst++ = cpu_to_scr(new);
3664 *dst++ = cpu_to_scr(*src++);
3670 ** Linux host data structure
3677 #define PRINT_ADDR(cmd, arg...) dev_info(&cmd->device->sdev_gendev , ## arg)
3679 static void ncr_print_msg(struct ccb *cp, char *label, u_char *msg)
3681 PRINT_ADDR(cp->cmd, "%s: ", label);
3687 /*==========================================================
3689 ** NCR chip clock divisor table.
3690 ** Divisors are multiplied by 10,000,000 in order to make
3691 ** calculations more simple.
3693 **==========================================================
3697 static u_long div_10M[] =
3698 {2*_5M, 3*_5M, 4*_5M, 6*_5M, 8*_5M, 12*_5M, 16*_5M};
3701 /*===============================================================
3703 ** Prepare io register values used by ncr_init() according
3704 ** to selected and supported features.
3706 ** NCR chips allow burst lengths of 2, 4, 8, 16, 32, 64, 128
3707 ** transfers. 32,64,128 are only supported by 875 and 895 chips.
3708 ** We use log base 2 (burst length) as internal code, with
3709 ** value 0 meaning "burst disabled".
3711 **===============================================================
3715 * Burst length from burst code.
3717 #define burst_length(bc) (!(bc))? 0 : 1 << (bc)
3720 * Burst code from io register bits. Burst enable is ctest0 for c720
3722 #define burst_code(dmode, ctest0) \
3723 (ctest0) & 0x80 ? 0 : (((dmode) & 0xc0) >> 6) + 1
3726 * Set initial io register bits from burst code.
3728 static inline void ncr_init_burst(struct ncb *np, u_char bc)
3730 u_char *be = &np->rv_ctest0;
3732 np->rv_dmode &= ~(0x3 << 6);
3733 np->rv_ctest5 &= ~0x4;
3739 np->rv_dmode |= ((bc & 0x3) << 6);
3740 np->rv_ctest5 |= (bc & 0x4);
3744 static void __init ncr_prepare_setting(struct ncb *np)
3751 ** Save assumed BIOS setting
3754 np->sv_scntl0 = INB(nc_scntl0) & 0x0a;
3755 np->sv_scntl3 = INB(nc_scntl3) & 0x07;
3756 np->sv_dmode = INB(nc_dmode) & 0xce;
3757 np->sv_dcntl = INB(nc_dcntl) & 0xa8;
3758 np->sv_ctest0 = INB(nc_ctest0) & 0x84;
3759 np->sv_ctest3 = INB(nc_ctest3) & 0x01;
3760 np->sv_ctest4 = INB(nc_ctest4) & 0x80;
3761 np->sv_ctest5 = INB(nc_ctest5) & 0x24;
3762 np->sv_gpcntl = INB(nc_gpcntl);
3763 np->sv_stest2 = INB(nc_stest2) & 0x20;
3764 np->sv_stest4 = INB(nc_stest4);
3770 np->maxwide = (np->features & FE_WIDE)? 1 : 0;
3773 * Guess the frequency of the chip's clock.
3775 if (np->features & FE_ULTRA)
3776 np->clock_khz = 80000;
3778 np->clock_khz = 40000;
3781 * Get the clock multiplier factor.
3783 if (np->features & FE_QUAD)
3785 else if (np->features & FE_DBLR)
3791 * Measure SCSI clock frequency for chips
3792 * it may vary from assumed one.
3794 if (np->features & FE_VARCLK)
3795 ncr_getclock(np, np->multiplier);
3798 * Divisor to be used for async (timer pre-scaler).
3800 i = np->clock_divn - 1;
3802 if (10ul * SCSI_NCR_MIN_ASYNC * np->clock_khz > div_10M[i]) {
3807 np->rv_scntl3 = i+1;
3810 * Minimum synchronous period factor supported by the chip.
3811 * Btw, 'period' is in tenths of nanoseconds.
3814 period = (4 * div_10M[0] + np->clock_khz - 1) / np->clock_khz;
3815 if (period <= 250) np->minsync = 10;
3816 else if (period <= 303) np->minsync = 11;
3817 else if (period <= 500) np->minsync = 12;
3818 else np->minsync = (period + 40 - 1) / 40;
3821 * Check against chip SCSI standard support (SCSI-2,ULTRA,ULTRA2).
3824 if (np->minsync < 25 && !(np->features & FE_ULTRA))
3828 * Maximum synchronous period factor supported by the chip.
3831 period = (11 * div_10M[np->clock_divn - 1]) / (4 * np->clock_khz);
3832 np->maxsync = period > 2540 ? 254 : period / 10;
3835 ** Prepare initial value of other IO registers
3837 #if defined SCSI_NCR_TRUST_BIOS_SETTING
3838 np->rv_scntl0 = np->sv_scntl0;
3839 np->rv_dmode = np->sv_dmode;
3840 np->rv_dcntl = np->sv_dcntl;
3841 np->rv_ctest0 = np->sv_ctest0;
3842 np->rv_ctest3 = np->sv_ctest3;
3843 np->rv_ctest4 = np->sv_ctest4;
3844 np->rv_ctest5 = np->sv_ctest5;
3845 burst_max = burst_code(np->sv_dmode, np->sv_ctest0);
3849 ** Select burst length (dwords)
3851 burst_max = driver_setup.burst_max;
3852 if (burst_max == 255)
3853 burst_max = burst_code(np->sv_dmode, np->sv_ctest0);
3856 if (burst_max > np->maxburst)
3857 burst_max = np->maxburst;
3860 ** Select all supported special features
3862 if (np->features & FE_ERL)
3863 np->rv_dmode |= ERL; /* Enable Read Line */
3864 if (np->features & FE_BOF)
3865 np->rv_dmode |= BOF; /* Burst Opcode Fetch */
3866 if (np->features & FE_ERMP)
3867 np->rv_dmode |= ERMP; /* Enable Read Multiple */
3868 if (np->features & FE_PFEN)
3869 np->rv_dcntl |= PFEN; /* Prefetch Enable */
3870 if (np->features & FE_CLSE)
3871 np->rv_dcntl |= CLSE; /* Cache Line Size Enable */
3872 if (np->features & FE_WRIE)
3873 np->rv_ctest3 |= WRIE; /* Write and Invalidate */
3874 if (np->features & FE_DFS)
3875 np->rv_ctest5 |= DFS; /* Dma Fifo Size */
3876 if (np->features & FE_MUX)
3877 np->rv_ctest4 |= MUX; /* Host bus multiplex mode */
3878 if (np->features & FE_EA)
3879 np->rv_dcntl |= EA; /* Enable ACK */
3880 if (np->features & FE_EHP)
3881 np->rv_ctest0 |= EHP; /* Even host parity */
3884 ** Select some other
3886 if (driver_setup.master_parity)
3887 np->rv_ctest4 |= MPEE; /* Master parity checking */
3888 if (driver_setup.scsi_parity)
3889 np->rv_scntl0 |= 0x0a; /* full arb., ena parity, par->ATN */
3892 ** Get SCSI addr of host adapter (set by bios?).
3894 if (np->myaddr == 255) {
3895 np->myaddr = INB(nc_scid) & 0x07;
3897 np->myaddr = SCSI_NCR_MYADDR;
3900 #endif /* SCSI_NCR_TRUST_BIOS_SETTING */
3903 * Prepare initial io register bits for burst length
3905 ncr_init_burst(np, burst_max);
3908 ** Set SCSI BUS mode.
3910 ** - ULTRA2 chips (895/895A/896) report the current
3911 ** BUS mode through the STEST4 IO register.
3912 ** - For previous generation chips (825/825A/875),
3913 ** user has to tell us how to check against HVD,
3914 ** since a 100% safe algorithm is not possible.
3916 np->scsi_mode = SMODE_SE;
3917 if (np->features & FE_DIFF) {
3918 switch(driver_setup.diff_support) {
3919 case 4: /* Trust previous settings if present, then GPIO3 */
3920 if (np->sv_scntl3) {
3921 if (np->sv_stest2 & 0x20)
3922 np->scsi_mode = SMODE_HVD;
3925 case 3: /* SYMBIOS controllers report HVD through GPIO3 */
3926 if (INB(nc_gpreg) & 0x08)
3928 case 2: /* Set HVD unconditionally */
3929 np->scsi_mode = SMODE_HVD;
3930 case 1: /* Trust previous settings for HVD */
3931 if (np->sv_stest2 & 0x20)
3932 np->scsi_mode = SMODE_HVD;
3934 default:/* Don't care about HVD */
3938 if (np->scsi_mode == SMODE_HVD)
3939 np->rv_stest2 |= 0x20;
3942 ** Set LED support from SCRIPTS.
3943 ** Ignore this feature for boards known to use a
3944 ** specific GPIO wiring and for the 895A or 896
3945 ** that drive the LED directly.
3946 ** Also probe initial setting of GPIO0 as output.
3948 if ((driver_setup.led_pin) &&
3949 !(np->features & FE_LEDC) && !(np->sv_gpcntl & 0x01))
3950 np->features |= FE_LED0;
3955 switch(driver_setup.irqm & 3) {
3957 np->rv_dcntl |= IRQM;
3960 np->rv_dcntl |= (np->sv_dcntl & IRQM);
3967 ** Configure targets according to driver setup.
3968 ** Allow to override sync, wide and NOSCAN from
3969 ** boot command line.
3971 for (i = 0 ; i < MAX_TARGET ; i++) {
3972 struct tcb *tp = &np->target[i];
3974 tp->usrsync = driver_setup.default_sync;
3975 tp->usrwide = driver_setup.max_wide;
3976 tp->usrtags = MAX_TAGS;
3977 tp->period = 0xffff;
3978 if (!driver_setup.disconnection)
3979 np->target[i].usrflag = UF_NODISC;
3983 ** Announce all that stuff to user.
3986 printk(KERN_INFO "%s: ID %d, Fast-%d%s%s\n", ncr_name(np),
3988 np->minsync < 12 ? 40 : (np->minsync < 25 ? 20 : 10),
3989 (np->rv_scntl0 & 0xa) ? ", Parity Checking" : ", NO Parity",
3990 (np->rv_stest2 & 0x20) ? ", Differential" : "");
3992 if (bootverbose > 1) {
3993 printk (KERN_INFO "%s: initial SCNTL3/DMODE/DCNTL/CTEST3/4/5 = "
3994 "(hex) %02x/%02x/%02x/%02x/%02x/%02x\n",
3995 ncr_name(np), np->sv_scntl3, np->sv_dmode, np->sv_dcntl,
3996 np->sv_ctest3, np->sv_ctest4, np->sv_ctest5);
3998 printk (KERN_INFO "%s: final SCNTL3/DMODE/DCNTL/CTEST3/4/5 = "
3999 "(hex) %02x/%02x/%02x/%02x/%02x/%02x\n",
4000 ncr_name(np), np->rv_scntl3, np->rv_dmode, np->rv_dcntl,
4001 np->rv_ctest3, np->rv_ctest4, np->rv_ctest5);
4004 if (bootverbose && np->paddr2)
4005 printk (KERN_INFO "%s: on-chip RAM at 0x%lx\n",
4006 ncr_name(np), np->paddr2);
4009 /*==========================================================
4012 ** Done SCSI commands list management.
4014 ** We donnot enter the scsi_done() callback immediately
4015 ** after a command has been seen as completed but we
4016 ** insert it into a list which is flushed outside any kind
4017 ** of driver critical section.
4018 ** This allows to do minimal stuff under interrupt and
4019 ** inside critical sections and to also avoid locking up
4020 ** on recursive calls to driver entry points under SMP.
4021 ** In fact, the only kernel point which is entered by the
4022 ** driver with a driver lock set is kmalloc(GFP_ATOMIC)
4023 ** that shall not reenter the driver under any circumstances,
4026 **==========================================================
4028 static inline void ncr_queue_done_cmd(struct ncb *np, struct scsi_cmnd *cmd)
4030 unmap_scsi_data(np, cmd);
4031 cmd->host_scribble = (char *) np->done_list;
4032 np->done_list = cmd;
4035 static inline void ncr_flush_done_cmds(struct scsi_cmnd *lcmd)
4037 struct scsi_cmnd *cmd;
4041 lcmd = (struct scsi_cmnd *) cmd->host_scribble;
4042 cmd->scsi_done(cmd);
4046 /*==========================================================
4049 ** Prepare the next negotiation message if needed.
4051 ** Fill in the part of message buffer that contains the
4052 ** negotiation and the nego_status field of the CCB.
4053 ** Returns the size of the message in bytes.
4056 **==========================================================
4060 static int ncr_prepare_nego(struct ncb *np, struct ccb *cp, u_char *msgptr)
4062 struct tcb *tp = &np->target[cp->target];
4065 struct scsi_target *starget = tp->starget;
4067 /* negotiate wide transfers ? */
4068 if (!tp->widedone) {
4069 if (spi_support_wide(starget)) {
4075 /* negotiate synchronous transfers? */
4076 if (!nego && !tp->period) {
4077 if (spi_support_sync(starget)) {
4081 dev_info(&starget->dev, "target did not report SYNC.\n");
4087 msglen += spi_populate_sync_msg(msgptr + msglen,
4088 tp->maxoffs ? tp->minsync : 0, tp->maxoffs);
4091 msglen += spi_populate_width_msg(msgptr + msglen, tp->usrwide);
4095 cp->nego_status = nego;
4099 if (DEBUG_FLAGS & DEBUG_NEGO) {
4100 ncr_print_msg(cp, nego == NS_WIDE ?
4101 "wide msgout":"sync_msgout", msgptr);
4110 /*==========================================================
4113 ** Start execution of a SCSI command.
4114 ** This is called from the generic SCSI driver.
4117 **==========================================================
4119 static int ncr_queue_command (struct ncb *np, struct scsi_cmnd *cmd)
4121 struct scsi_device *sdev = cmd->device;
4122 struct tcb *tp = &np->target[sdev->id];
4123 struct lcb *lp = tp->lp[sdev->lun];
4127 u_char idmsg, *msgptr;
4132 /*---------------------------------------------
4134 ** Some shortcuts ...
4136 **---------------------------------------------
4138 if ((sdev->id == np->myaddr ) ||
4139 (sdev->id >= MAX_TARGET) ||
4140 (sdev->lun >= MAX_LUN )) {
4141 return(DID_BAD_TARGET);
4144 /*---------------------------------------------
4146 ** Complete the 1st TEST UNIT READY command
4147 ** with error condition if the device is
4148 ** flagged NOSCAN, in order to speed up
4151 **---------------------------------------------
4153 if ((cmd->cmnd[0] == 0 || cmd->cmnd[0] == 0x12) &&
4154 (tp->usrflag & UF_NOSCAN)) {
4155 tp->usrflag &= ~UF_NOSCAN;
4156 return DID_BAD_TARGET;
4159 if (DEBUG_FLAGS & DEBUG_TINY) {
4160 PRINT_ADDR(cmd, "CMD=%x ", cmd->cmnd[0]);
4163 /*---------------------------------------------------
4165 ** Assign a ccb / bind cmd.
4166 ** If resetting, shorten settle_time if necessary
4167 ** in order to avoid spurious timeouts.
4168 ** If resetting or no free ccb,
4169 ** insert cmd into the waiting list.
4171 **----------------------------------------------------
4173 if (np->settle_time && cmd->request->timeout >= HZ) {
4174 u_long tlimit = jiffies + cmd->request->timeout - HZ;
4175 if (time_after(np->settle_time, tlimit))
4176 np->settle_time = tlimit;
4179 if (np->settle_time || !(cp=ncr_get_ccb (np, cmd))) {
4180 insert_into_waiting_list(np, cmd);
4185 /*----------------------------------------------------
4187 ** Build the identify / tag / sdtr message
4189 **----------------------------------------------------
4192 idmsg = IDENTIFY(0, sdev->lun);
4194 if (cp ->tag != NO_TAG ||
4195 (cp != np->ccb && np->disc && !(tp->usrflag & UF_NODISC)))
4198 msgptr = cp->scsi_smsg;
4200 msgptr[msglen++] = idmsg;
4202 if (cp->tag != NO_TAG) {
4203 char order = np->order;
4206 ** Force ordered tag if necessary to avoid timeouts
4207 ** and to preserve interactivity.
4209 if (lp && time_after(jiffies, lp->tags_stime)) {
4210 if (lp->tags_smap) {
4211 order = ORDERED_QUEUE_TAG;
4212 if ((DEBUG_FLAGS & DEBUG_TAGS)||bootverbose>2){
4214 "ordered tag forced.\n");
4217 lp->tags_stime = jiffies + 3*HZ;
4218 lp->tags_smap = lp->tags_umap;
4223 ** Ordered write ops, unordered read ops.
4225 switch (cmd->cmnd[0]) {
4226 case 0x08: /* READ_SMALL (6) */
4227 case 0x28: /* READ_BIG (10) */
4228 case 0xa8: /* READ_HUGE (12) */
4229 order = SIMPLE_QUEUE_TAG;
4232 order = ORDERED_QUEUE_TAG;
4235 msgptr[msglen++] = order;
4237 ** Actual tags are numbered 1,3,5,..2*MAXTAGS+1,
4238 ** since we may have to deal with devices that have
4239 ** problems with #TAG 0 or too great #TAG numbers.
4241 msgptr[msglen++] = (cp->tag << 1) + 1;
4244 /*----------------------------------------------------
4246 ** Build the data descriptors
4248 **----------------------------------------------------
4251 direction = cmd->sc_data_direction;
4252 if (direction != DMA_NONE) {
4253 segments = ncr_scatter(np, cp, cp->cmd);
4255 ncr_free_ccb(np, cp);
4264 /*---------------------------------------------------
4266 ** negotiation required?
4268 ** (nego_status is filled by ncr_prepare_nego())
4270 **---------------------------------------------------
4273 cp->nego_status = 0;
4275 if ((!tp->widedone || !tp->period) && !tp->nego_cp && lp) {
4276 msglen += ncr_prepare_nego (np, cp, msgptr + msglen);
4279 /*----------------------------------------------------
4281 ** Determine xfer direction.
4283 **----------------------------------------------------
4286 direction = DMA_NONE;
4289 ** If data direction is BIDIRECTIONAL, speculate FROM_DEVICE
4290 ** but prepare alternate pointers for TO_DEVICE in case
4291 ** of our speculation will be just wrong.
4292 ** SCRIPTS will swap values if needed.
4295 case DMA_BIDIRECTIONAL:
4297 goalp = NCB_SCRIPT_PHYS (np, data_out2) + 8;
4298 if (segments <= MAX_SCATTERL)
4299 lastp = goalp - 8 - (segments * 16);
4301 lastp = NCB_SCRIPTH_PHYS (np, hdata_out2);
4302 lastp -= (segments - MAX_SCATTERL) * 16;
4304 if (direction != DMA_BIDIRECTIONAL)
4306 cp->phys.header.wgoalp = cpu_to_scr(goalp);
4307 cp->phys.header.wlastp = cpu_to_scr(lastp);
4309 case DMA_FROM_DEVICE:
4310 goalp = NCB_SCRIPT_PHYS (np, data_in2) + 8;
4311 if (segments <= MAX_SCATTERL)
4312 lastp = goalp - 8 - (segments * 16);
4314 lastp = NCB_SCRIPTH_PHYS (np, hdata_in2);
4315 lastp -= (segments - MAX_SCATTERL) * 16;
4320 lastp = goalp = NCB_SCRIPT_PHYS (np, no_data);
4325 ** Set all pointers values needed by SCRIPTS.
4326 ** If direction is unknown, start at data_io.
4328 cp->phys.header.lastp = cpu_to_scr(lastp);
4329 cp->phys.header.goalp = cpu_to_scr(goalp);
4331 if (direction == DMA_BIDIRECTIONAL)
4332 cp->phys.header.savep =
4333 cpu_to_scr(NCB_SCRIPTH_PHYS (np, data_io));
4335 cp->phys.header.savep= cpu_to_scr(lastp);
4338 ** Save the initial data pointer in order to be able
4339 ** to redo the command.
4341 cp->startp = cp->phys.header.savep;
4343 /*----------------------------------------------------
4347 **----------------------------------------------------
4350 ** physical -> virtual backlink
4351 ** Generic SCSI command
4357 cp->start.schedule.l_paddr = cpu_to_scr(NCB_SCRIPT_PHYS (np, select));
4358 cp->restart.schedule.l_paddr = cpu_to_scr(NCB_SCRIPT_PHYS (np, resel_dsa));
4362 cp->phys.select.sel_id = sdev_id(sdev);
4363 cp->phys.select.sel_scntl3 = tp->wval;
4364 cp->phys.select.sel_sxfer = tp->sval;
4368 cp->phys.smsg.addr = cpu_to_scr(CCB_PHYS (cp, scsi_smsg));
4369 cp->phys.smsg.size = cpu_to_scr(msglen);
4374 memcpy(cp->cdb_buf, cmd->cmnd, min_t(int, cmd->cmd_len, sizeof(cp->cdb_buf)));
4375 cp->phys.cmd.addr = cpu_to_scr(CCB_PHYS (cp, cdb_buf[0]));
4376 cp->phys.cmd.size = cpu_to_scr(cmd->cmd_len);
4381 cp->actualquirks = 0;
4382 cp->host_status = cp->nego_status ? HS_NEGOTIATE : HS_BUSY;
4383 cp->scsi_status = S_ILLEGAL;
4384 cp->parity_status = 0;
4386 cp->xerr_status = XE_OK;
4388 cp->sync_status = tp->sval;
4389 cp->wide_status = tp->wval;
4392 /*----------------------------------------------------
4394 ** Critical region: start this job.
4396 **----------------------------------------------------
4399 /* activate this job. */
4400 cp->magic = CCB_MAGIC;
4403 ** insert next CCBs into start queue.
4404 ** 2 max at a time is enough to flush the CCB wait queue.
4408 ncr_start_next_ccb(np, lp, 2);
4410 ncr_put_start_queue(np, cp);
4412 /* Command is successfully queued. */
4418 /*==========================================================
4421 ** Insert a CCB into the start queue and wake up the
4422 ** SCRIPTS processor.
4425 **==========================================================
4428 static void ncr_start_next_ccb(struct ncb *np, struct lcb *lp, int maxn)
4430 struct list_head *qp;
4436 while (maxn-- && lp->queuedccbs < lp->queuedepth) {
4437 qp = ncr_list_pop(&lp->wait_ccbq);
4441 cp = list_entry(qp, struct ccb, link_ccbq);
4442 list_add_tail(qp, &lp->busy_ccbq);
4443 lp->jump_ccb[cp->tag == NO_TAG ? 0 : cp->tag] =
4444 cpu_to_scr(CCB_PHYS (cp, restart));
4445 ncr_put_start_queue(np, cp);
4449 static void ncr_put_start_queue(struct ncb *np, struct ccb *cp)
4454 ** insert into start queue.
4456 if (!np->squeueput) np->squeueput = 1;
4457 qidx = np->squeueput + 2;
4458 if (qidx >= MAX_START + MAX_START) qidx = 1;
4460 np->scripth->tryloop [qidx] = cpu_to_scr(NCB_SCRIPT_PHYS (np, idle));
4462 np->scripth->tryloop [np->squeueput] = cpu_to_scr(CCB_PHYS (cp, start));
4464 np->squeueput = qidx;
4468 if (DEBUG_FLAGS & DEBUG_QUEUE)
4469 printk ("%s: queuepos=%d.\n", ncr_name (np), np->squeueput);
4472 ** Script processor may be waiting for reselect.
4476 OUTB (nc_istat, SIGP);
4480 static int ncr_reset_scsi_bus(struct ncb *np, int enab_int, int settle_delay)
4485 np->settle_time = jiffies + settle_delay * HZ;
4487 if (bootverbose > 1)
4488 printk("%s: resetting, "
4489 "command processing suspended for %d seconds\n",
4490 ncr_name(np), settle_delay);
4492 ncr_chip_reset(np, 100);
4493 udelay(2000); /* The 895 needs time for the bus mode to settle */
4495 OUTW (nc_sien, RST);
4497 ** Enable Tolerant, reset IRQD if present and
4498 ** properly set IRQ mode, prior to resetting the bus.
4500 OUTB (nc_stest3, TE);
4501 OUTB (nc_scntl1, CRST);
4504 if (!driver_setup.bus_check)
4507 ** Check for no terminators or SCSI bus shorts to ground.
4508 ** Read SCSI data bus, data parity bits and control signals.
4509 ** We are expecting RESET to be TRUE and other signals to be
4513 term = INB(nc_sstat0);
4514 term = ((term & 2) << 7) + ((term & 1) << 17); /* rst sdp0 */
4515 term |= ((INB(nc_sstat2) & 0x01) << 26) | /* sdp1 */
4516 ((INW(nc_sbdl) & 0xff) << 9) | /* d7-0 */
4517 ((INW(nc_sbdl) & 0xff00) << 10) | /* d15-8 */
4518 INB(nc_sbcl); /* req ack bsy sel atn msg cd io */
4520 if (!(np->features & FE_WIDE))
4523 if (term != (2<<7)) {
4524 printk("%s: suspicious SCSI data while resetting the BUS.\n",
4526 printk("%s: %sdp0,d7-0,rst,req,ack,bsy,sel,atn,msg,c/d,i/o = "
4527 "0x%lx, expecting 0x%lx\n",
4529 (np->features & FE_WIDE) ? "dp1,d15-8," : "",
4530 (u_long)term, (u_long)(2<<7));
4531 if (driver_setup.bus_check == 1)
4535 OUTB (nc_scntl1, 0);
4540 * Start reset process.
4541 * If reset in progress do nothing.
4542 * The interrupt handler will reinitialize the chip.
4543 * The timeout handler will wait for settle_time before
4544 * clearing it and so resuming command processing.
4546 static void ncr_start_reset(struct ncb *np)
4548 if (!np->settle_time) {
4549 ncr_reset_scsi_bus(np, 1, driver_setup.settle_delay);
4553 /*==========================================================
4556 ** Reset the SCSI BUS.
4557 ** This is called from the generic SCSI driver.
4560 **==========================================================
4562 static int ncr_reset_bus (struct ncb *np, struct scsi_cmnd *cmd, int sync_reset)
4564 /* struct scsi_device *device = cmd->device; */
4569 * Return immediately if reset is in progress.
4571 if (np->settle_time) {
4575 * Start the reset process.
4576 * The script processor is then assumed to be stopped.
4577 * Commands will now be queued in the waiting list until a settle
4578 * delay of 2 seconds will be completed.
4580 ncr_start_reset(np);
4582 * First, look in the wakeup list
4584 for (found=0, cp=np->ccb; cp; cp=cp->link_ccb) {
4586 ** look for the ccb of this command.
4588 if (cp->host_status == HS_IDLE) continue;
4589 if (cp->cmd == cmd) {
4595 * Then, look in the waiting list
4597 if (!found && retrieve_from_waiting_list(0, np, cmd))
4600 * Wake-up all awaiting commands with DID_RESET.
4602 reset_waiting_list(np);
4604 * Wake-up all pending commands with HS_RESET -> DID_RESET.
4606 ncr_wakeup(np, HS_RESET);
4608 * If the involved command was not in a driver queue, and the
4609 * scsi driver told us reset is synchronous, and the command is not
4610 * currently in the waiting list, complete it with DID_RESET status,
4611 * in order to keep it alive.
4613 if (!found && sync_reset && !retrieve_from_waiting_list(0, np, cmd)) {
4614 cmd->result = ScsiResult(DID_RESET, 0);
4615 ncr_queue_done_cmd(np, cmd);
4621 #if 0 /* unused and broken.. */
4622 /*==========================================================
4625 ** Abort an SCSI command.
4626 ** This is called from the generic SCSI driver.
4629 **==========================================================
4631 static int ncr_abort_command (struct ncb *np, struct scsi_cmnd *cmd)
4633 /* struct scsi_device *device = cmd->device; */
4639 * First, look for the scsi command in the waiting list
4641 if (remove_from_waiting_list(np, cmd)) {
4642 cmd->result = ScsiResult(DID_ABORT, 0);
4643 ncr_queue_done_cmd(np, cmd);
4644 return SCSI_ABORT_SUCCESS;
4648 * Then, look in the wakeup list
4650 for (found=0, cp=np->ccb; cp; cp=cp->link_ccb) {
4652 ** look for the ccb of this command.
4654 if (cp->host_status == HS_IDLE) continue;
4655 if (cp->cmd == cmd) {
4662 return SCSI_ABORT_NOT_RUNNING;
4665 if (np->settle_time) {
4666 return SCSI_ABORT_SNOOZE;
4670 ** If the CCB is active, patch schedule jumps for the
4671 ** script to abort the command.
4674 switch(cp->host_status) {
4677 printk ("%s: abort ccb=%p (cancel)\n", ncr_name (np), cp);
4678 cp->start.schedule.l_paddr =
4679 cpu_to_scr(NCB_SCRIPTH_PHYS (np, cancel));
4680 retv = SCSI_ABORT_PENDING;
4683 cp->restart.schedule.l_paddr =
4684 cpu_to_scr(NCB_SCRIPTH_PHYS (np, abort));
4685 retv = SCSI_ABORT_PENDING;
4688 retv = SCSI_ABORT_NOT_RUNNING;
4694 ** If there are no requests, the script
4695 ** processor will sleep on SEL_WAIT_RESEL.
4696 ** Let's wake it up, since it may have to work.
4698 OUTB (nc_istat, SIGP);
4704 static void ncr_detach(struct ncb *np)
4713 /* Local copy so we don't access np after freeing it! */
4714 strlcpy(inst_name, ncr_name(np), sizeof(inst_name));
4716 printk("%s: releasing host resources\n", ncr_name(np));
4719 ** Stop the ncr_timeout process
4720 ** Set release_stage to 1 and wait that ncr_timeout() set it to 2.
4723 #ifdef DEBUG_NCR53C8XX
4724 printk("%s: stopping the timer\n", ncr_name(np));
4726 np->release_stage = 1;
4727 for (i = 50 ; i && np->release_stage != 2 ; i--)
4729 if (np->release_stage != 2)
4730 printk("%s: the timer seems to be already stopped\n", ncr_name(np));
4731 else np->release_stage = 2;
4734 ** Disable chip interrupts
4737 #ifdef DEBUG_NCR53C8XX
4738 printk("%s: disabling chip interrupts\n", ncr_name(np));
4745 ** Restore bios setting for automatic clock detection.
4748 printk("%s: resetting chip\n", ncr_name(np));
4749 ncr_chip_reset(np, 100);
4751 OUTB(nc_dmode, np->sv_dmode);
4752 OUTB(nc_dcntl, np->sv_dcntl);
4753 OUTB(nc_ctest0, np->sv_ctest0);
4754 OUTB(nc_ctest3, np->sv_ctest3);
4755 OUTB(nc_ctest4, np->sv_ctest4);
4756 OUTB(nc_ctest5, np->sv_ctest5);
4757 OUTB(nc_gpcntl, np->sv_gpcntl);
4758 OUTB(nc_stest2, np->sv_stest2);
4760 ncr_selectclock(np, np->sv_scntl3);
4763 ** Free allocated ccb(s)
4766 while ((cp=np->ccb->link_ccb) != NULL) {
4767 np->ccb->link_ccb = cp->link_ccb;
4768 if (cp->host_status) {
4769 printk("%s: shall free an active ccb (host_status=%d)\n",
4770 ncr_name(np), cp->host_status);
4772 #ifdef DEBUG_NCR53C8XX
4773 printk("%s: freeing ccb (%lx)\n", ncr_name(np), (u_long) cp);
4775 m_free_dma(cp, sizeof(*cp), "CCB");
4778 /* Free allocated tp(s) */
4780 for (target = 0; target < MAX_TARGET ; target++) {
4781 tp=&np->target[target];
4782 for (lun = 0 ; lun < MAX_LUN ; lun++) {
4785 #ifdef DEBUG_NCR53C8XX
4786 printk("%s: freeing lp (%lx)\n", ncr_name(np), (u_long) lp);
4788 if (lp->jump_ccb != &lp->jump_ccb_0)
4789 m_free_dma(lp->jump_ccb,256,"JUMP_CCB");
4790 m_free_dma(lp, sizeof(*lp), "LCB");
4796 m_free_dma(np->scripth0, sizeof(struct scripth), "SCRIPTH");
4798 m_free_dma(np->script0, sizeof(struct script), "SCRIPT");
4800 m_free_dma(np->ccb, sizeof(struct ccb), "CCB");
4801 m_free_dma(np, sizeof(struct ncb), "NCB");
4803 printk("%s: host resources successfully released\n", inst_name);
4806 /*==========================================================
4809 ** Complete execution of a SCSI command.
4810 ** Signal completion to the generic SCSI driver.
4813 **==========================================================
4816 void ncr_complete (struct ncb *np, struct ccb *cp)
4818 struct scsi_cmnd *cmd;
4826 if (!cp || cp->magic != CCB_MAGIC || !cp->cmd)
4830 ** Print minimal debug information.
4833 if (DEBUG_FLAGS & DEBUG_TINY)
4834 printk ("CCB=%lx STAT=%x/%x\n", (unsigned long)cp,
4835 cp->host_status,cp->scsi_status);
4838 ** Get command, target and lun pointers.
4843 tp = &np->target[cmd->device->id];
4844 lp = tp->lp[cmd->device->lun];
4847 ** We donnot queue more than 1 ccb per target
4848 ** with negotiation at any time. If this ccb was
4849 ** used for negotiation, clear this info in the tcb.
4852 if (cp == tp->nego_cp)
4856 ** If auto-sense performed, change scsi status.
4858 if (cp->auto_sense) {
4859 cp->scsi_status = cp->auto_sense;
4863 ** If we were recovering from queue full or performing
4864 ** auto-sense, requeue skipped CCBs to the wait queue.
4867 if (lp && lp->held_ccb) {
4868 if (cp == lp->held_ccb) {
4869 list_splice_init(&lp->skip_ccbq, &lp->wait_ccbq);
4870 lp->held_ccb = NULL;
4875 ** Check for parity errors.
4878 if (cp->parity_status > 1) {
4879 PRINT_ADDR(cmd, "%d parity error(s).\n",cp->parity_status);
4883 ** Check for extended errors.
4886 if (cp->xerr_status != XE_OK) {
4887 switch (cp->xerr_status) {
4889 PRINT_ADDR(cmd, "extraneous data discarded.\n");
4892 PRINT_ADDR(cmd, "invalid scsi phase (4/5).\n");
4895 PRINT_ADDR(cmd, "extended error %d.\n",
4899 if (cp->host_status==HS_COMPLETE)
4900 cp->host_status = HS_FAIL;
4904 ** Print out any error for debugging purpose.
4906 if (DEBUG_FLAGS & (DEBUG_RESULT|DEBUG_TINY)) {
4907 if (cp->host_status!=HS_COMPLETE || cp->scsi_status!=S_GOOD) {
4908 PRINT_ADDR(cmd, "ERROR: cmd=%x host_status=%x "
4909 "scsi_status=%x\n", cmd->cmnd[0],
4910 cp->host_status, cp->scsi_status);
4915 ** Check the status.
4917 if ( (cp->host_status == HS_COMPLETE)
4918 && (cp->scsi_status == S_GOOD ||
4919 cp->scsi_status == S_COND_MET)) {
4921 * All went well (GOOD status).
4922 * CONDITION MET status is returned on
4923 * `Pre-Fetch' or `Search data' success.
4925 cmd->result = ScsiResult(DID_OK, cp->scsi_status);
4929 ** Could dig out the correct value for resid,
4930 ** but it would be quite complicated.
4932 /* if (cp->phys.header.lastp != cp->phys.header.goalp) */
4935 ** Allocate the lcb if not yet.
4938 ncr_alloc_lcb (np, cmd->device->id, cmd->device->lun);
4940 tp->bytes += cp->data_len;
4944 ** If tags was reduced due to queue full,
4945 ** increase tags if 1000 good status received.
4947 if (lp && lp->usetags && lp->numtags < lp->maxtags) {
4949 if (lp->num_good >= 1000) {
4952 ncr_setup_tags (np, cmd->device);
4955 } else if ((cp->host_status == HS_COMPLETE)
4956 && (cp->scsi_status == S_CHECK_COND)) {
4958 ** Check condition code
4960 cmd->result = ScsiResult(DID_OK, S_CHECK_COND);
4963 ** Copy back sense data to caller's buffer.
4965 memcpy(cmd->sense_buffer, cp->sense_buf,
4966 min_t(size_t, SCSI_SENSE_BUFFERSIZE,
4967 sizeof(cp->sense_buf)));
4969 if (DEBUG_FLAGS & (DEBUG_RESULT|DEBUG_TINY)) {
4970 u_char *p = cmd->sense_buffer;
4972 PRINT_ADDR(cmd, "sense data:");
4973 for (i=0; i<14; i++) printk (" %x", *p++);
4976 } else if ((cp->host_status == HS_COMPLETE)
4977 && (cp->scsi_status == S_CONFLICT)) {
4979 ** Reservation Conflict condition code
4981 cmd->result = ScsiResult(DID_OK, S_CONFLICT);
4983 } else if ((cp->host_status == HS_COMPLETE)
4984 && (cp->scsi_status == S_BUSY ||
4985 cp->scsi_status == S_QUEUE_FULL)) {
4990 cmd->result = ScsiResult(DID_OK, cp->scsi_status);
4992 } else if ((cp->host_status == HS_SEL_TIMEOUT)
4993 || (cp->host_status == HS_TIMEOUT)) {
4998 cmd->result = ScsiResult(DID_TIME_OUT, cp->scsi_status);
5000 } else if (cp->host_status == HS_RESET) {
5005 cmd->result = ScsiResult(DID_RESET, cp->scsi_status);
5007 } else if (cp->host_status == HS_ABORTED) {
5012 cmd->result = ScsiResult(DID_ABORT, cp->scsi_status);
5017 ** Other protocol messes
5019 PRINT_ADDR(cmd, "COMMAND FAILED (%x %x) @%p.\n",
5020 cp->host_status, cp->scsi_status, cp);
5022 cmd->result = ScsiResult(DID_ERROR, cp->scsi_status);
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) {
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 reasonnable ? (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 */
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 = S_ILLEGAL;
6602 ncr_put_start_queue(np, cp);
6604 INB (nc_ctest2); /* Clear SIGP */
6605 OUTL_DSP (NCB_SCRIPT_PHYS (np, reselect));
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 << 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 = S_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]));
6729 case SIR_RESEL_BAD_TARGET: /* Will send a TARGET RESET message */
6730 case SIR_RESEL_BAD_LUN: /* Will send a TARGET RESET message */
6731 case SIR_RESEL_BAD_I_T_L_Q: /* Will send an ABORT TAG message */
6732 case SIR_RESEL_BAD_I_T_L: /* Will send an ABORT message */
6733 printk ("%s:%d: SIR %d, "
6734 "incorrect nexus identification on reselection\n",
6735 ncr_name (np), target, num);
6737 case SIR_DONE_OVERFLOW:
6738 printk ("%s:%d: SIR %d, "
6739 "CCB done queue overflow\n",
6740 ncr_name (np), target, num);
6742 case SIR_BAD_STATUS:
6744 if (!cp || CCB_PHYS (cp, phys) != dsa)
6746 ncr_sir_to_redo(np, num, cp);
6753 while (cp && (CCB_PHYS (cp, phys) != dsa))
6757 BUG_ON(cp != np->header.cp);
6759 if (!cp || cp != np->header.cp)
6764 /*-----------------------------------------------------------------------------
6766 ** Was Sie schon immer ueber transfermode negotiation wissen wollten ...
6767 ** ("Everything you've always wanted to know about transfer mode
6770 ** We try to negotiate sync and wide transfer only after
6771 ** a successful inquire command. We look at byte 7 of the
6772 ** inquire data to determine the capabilities of the target.
6774 ** When we try to negotiate, we append the negotiation message
6775 ** to the identify and (maybe) simple tag message.
6776 ** The host status field is set to HS_NEGOTIATE to mark this
6779 ** If the target doesn't answer this message immediately
6780 ** (as required by the standard), the SIR_NEGO_FAIL interrupt
6781 ** will be raised eventually.
6782 ** The handler removes the HS_NEGOTIATE status, and sets the
6783 ** negotiated value to the default (async / nowide).
6785 ** If we receive a matching answer immediately, we check it
6786 ** for validity, and set the values.
6788 ** If we receive a Reject message immediately, we assume the
6789 ** negotiation has failed, and fall back to standard values.
6791 ** If we receive a negotiation message while not in HS_NEGOTIATE
6792 ** state, it's a target initiated negotiation. We prepare a
6793 ** (hopefully) valid answer, set our parameters, and send back
6794 ** this answer to the target.
6796 ** If the target doesn't fetch the answer (no message out phase),
6797 ** we assume the negotiation has failed, and fall back to default
6800 ** When we set the values, we adjust them in all ccbs belonging
6801 ** to this target, in the controller's register, and in the "phys"
6802 ** field of the controller's struct ncb.
6804 ** Possible cases: hs sir msg_in value send goto
6805 ** We try to negotiate:
6806 ** -> target doesn't msgin NEG FAIL noop defa. - dispatch
6807 ** -> target rejected our msg NEG FAIL reject defa. - dispatch
6808 ** -> target answered (ok) NEG SYNC sdtr set - clrack
6809 ** -> target answered (!ok) NEG SYNC sdtr defa. REJ--->msg_bad
6810 ** -> target answered (ok) NEG WIDE wdtr set - clrack
6811 ** -> target answered (!ok) NEG WIDE wdtr defa. REJ--->msg_bad
6812 ** -> any other msgin NEG FAIL noop defa. - dispatch
6814 ** Target tries to negotiate:
6815 ** -> incoming message --- SYNC sdtr set SDTR -
6816 ** -> incoming message --- WIDE wdtr set WDTR -
6817 ** We sent our answer:
6818 ** -> target doesn't msgout --- PROTO ? defa. - dispatch
6820 **-----------------------------------------------------------------------------
6823 case SIR_NEGO_FAILED:
6824 /*-------------------------------------------------------
6826 ** Negotiation failed.
6827 ** Target doesn't send an answer message,
6828 ** or target rejected our message.
6830 ** Remove negotiation request.
6832 **-------------------------------------------------------
6834 OUTB (HS_PRT, HS_BUSY);
6838 case SIR_NEGO_PROTO:
6839 /*-------------------------------------------------------
6841 ** Negotiation failed.
6842 ** Target doesn't fetch the answer message.
6844 **-------------------------------------------------------
6847 if (DEBUG_FLAGS & DEBUG_NEGO) {
6848 PRINT_ADDR(cp->cmd, "negotiation failed sir=%x "
6849 "status=%x.\n", num, cp->nego_status);
6853 ** any error in negotiation:
6854 ** fall back to default mode.
6856 switch (cp->nego_status) {
6859 spi_period(starget) = 0;
6860 spi_offset(starget) = 0;
6861 ncr_setsync (np, cp, 0, 0xe0);
6865 spi_width(starget) = 0;
6866 ncr_setwide (np, cp, 0, 0);
6870 np->msgin [0] = NOP;
6871 np->msgout[0] = NOP;
6872 cp->nego_status = 0;
6876 if (DEBUG_FLAGS & DEBUG_NEGO) {
6877 ncr_print_msg(cp, "sync msgin", np->msgin);
6883 if (ofs==0) per=255;
6886 ** if target sends SDTR message,
6887 ** it CAN transfer synch.
6891 spi_support_sync(starget) = 1;
6894 ** check values against driver limits.
6897 if (per < np->minsync)
6898 {chg = 1; per = np->minsync;}
6899 if (per < tp->minsync)
6900 {chg = 1; per = tp->minsync;}
6901 if (ofs > tp->maxoffs)
6902 {chg = 1; ofs = tp->maxoffs;}
6905 ** Check against controller limits.
6910 ncr_getsync(np, per, &fak, &scntl3);
6923 if (DEBUG_FLAGS & DEBUG_NEGO) {
6924 PRINT_ADDR(cp->cmd, "sync: per=%d scntl3=0x%x ofs=%d "
6925 "fak=%d chg=%d.\n", per, scntl3, ofs, fak, chg);
6928 if (INB (HS_PRT) == HS_NEGOTIATE) {
6929 OUTB (HS_PRT, HS_BUSY);
6930 switch (cp->nego_status) {
6933 /* This was an answer message */
6935 /* Answer wasn't acceptable. */
6936 spi_period(starget) = 0;
6937 spi_offset(starget) = 0;
6938 ncr_setsync(np, cp, 0, 0xe0);
6939 OUTL_DSP(NCB_SCRIPT_PHYS (np, msg_bad));
6942 spi_period(starget) = per;
6943 spi_offset(starget) = ofs;
6944 ncr_setsync(np, cp, scntl3, (fak<<5)|ofs);
6945 OUTL_DSP(NCB_SCRIPT_PHYS (np, clrack));
6950 spi_width(starget) = 0;
6951 ncr_setwide(np, cp, 0, 0);
6957 ** It was a request. Set value and
6958 ** prepare an answer message
6961 spi_period(starget) = per;
6962 spi_offset(starget) = ofs;
6963 ncr_setsync(np, cp, scntl3, (fak<<5)|ofs);
6965 spi_populate_sync_msg(np->msgout, per, ofs);
6966 cp->nego_status = NS_SYNC;
6968 if (DEBUG_FLAGS & DEBUG_NEGO) {
6969 ncr_print_msg(cp, "sync msgout", np->msgout);
6973 OUTL_DSP (NCB_SCRIPT_PHYS (np, msg_bad));
6976 np->msgin [0] = NOP;
6982 ** Wide request message received.
6984 if (DEBUG_FLAGS & DEBUG_NEGO) {
6985 ncr_print_msg(cp, "wide msgin", np->msgin);
6989 ** get requested values.
6993 wide = np->msgin[3];
6996 ** if target sends WDTR message,
6997 ** it CAN transfer wide.
7000 if (wide && starget)
7001 spi_support_wide(starget) = 1;
7004 ** check values against driver limits.
7007 if (wide > tp->usrwide)
7008 {chg = 1; wide = tp->usrwide;}
7010 if (DEBUG_FLAGS & DEBUG_NEGO) {
7011 PRINT_ADDR(cp->cmd, "wide: wide=%d chg=%d.\n", wide,
7015 if (INB (HS_PRT) == HS_NEGOTIATE) {
7016 OUTB (HS_PRT, HS_BUSY);
7017 switch (cp->nego_status) {
7021 ** This was an answer message
7024 /* Answer wasn't acceptable. */
7025 spi_width(starget) = 0;
7026 ncr_setwide(np, cp, 0, 1);
7027 OUTL_DSP (NCB_SCRIPT_PHYS (np, msg_bad));
7030 spi_width(starget) = wide;
7031 ncr_setwide(np, cp, wide, 1);
7032 OUTL_DSP (NCB_SCRIPT_PHYS (np, clrack));
7037 spi_period(starget) = 0;
7038 spi_offset(starget) = 0;
7039 ncr_setsync(np, cp, 0, 0xe0);
7045 ** It was a request, set value and
7046 ** prepare an answer message
7049 spi_width(starget) = wide;
7050 ncr_setwide(np, cp, wide, 1);
7051 spi_populate_width_msg(np->msgout, wide);
7053 np->msgin [0] = NOP;
7055 cp->nego_status = NS_WIDE;
7057 if (DEBUG_FLAGS & DEBUG_NEGO) {
7058 ncr_print_msg(cp, "wide msgout", np->msgin);
7062 /*--------------------------------------------------------------------
7064 ** Processing of special messages
7066 **--------------------------------------------------------------------
7069 case SIR_REJECT_RECEIVED:
7070 /*-----------------------------------------------
7072 ** We received a MESSAGE_REJECT.
7074 **-----------------------------------------------
7077 PRINT_ADDR(cp->cmd, "MESSAGE_REJECT received (%x:%x).\n",
7078 (unsigned)scr_to_cpu(np->lastmsg), np->msgout[0]);
7081 case SIR_REJECT_SENT:
7082 /*-----------------------------------------------
7084 ** We received an unknown message
7086 **-----------------------------------------------
7089 ncr_print_msg(cp, "MESSAGE_REJECT sent for", np->msgin);
7092 /*--------------------------------------------------------------------
7094 ** Processing of special messages
7096 **--------------------------------------------------------------------
7099 case SIR_IGN_RESIDUE:
7100 /*-----------------------------------------------
7102 ** We received an IGNORE RESIDUE message,
7103 ** which couldn't be handled by the script.
7105 **-----------------------------------------------
7108 PRINT_ADDR(cp->cmd, "IGNORE_WIDE_RESIDUE received, but not yet "
7112 case SIR_MISSING_SAVE:
7113 /*-----------------------------------------------
7115 ** We received an DISCONNECT message,
7116 ** but the datapointer wasn't saved before.
7118 **-----------------------------------------------
7121 PRINT_ADDR(cp->cmd, "DISCONNECT received, but datapointer "
7122 "not saved: data=%x save=%x goal=%x.\n",
7123 (unsigned) INL (nc_temp),
7124 (unsigned) scr_to_cpu(np->header.savep),
7125 (unsigned) scr_to_cpu(np->header.goalp));
7134 /*==========================================================
7137 ** Acquire a control block
7140 **==========================================================
7143 static struct ccb *ncr_get_ccb(struct ncb *np, struct scsi_cmnd *cmd)
7145 u_char tn = cmd->device->id;
7146 u_char ln = cmd->device->lun;
7147 struct tcb *tp = &np->target[tn];
7148 struct lcb *lp = tp->lp[ln];
7149 u_char tag = NO_TAG;
7150 struct ccb *cp = NULL;
7153 ** Lun structure available ?
7156 struct list_head *qp;
7158 ** Keep from using more tags than we can handle.
7160 if (lp->usetags && lp->busyccbs >= lp->maxnxs)
7164 ** Allocate a new CCB if needed.
7166 if (list_empty(&lp->free_ccbq))
7167 ncr_alloc_ccb(np, tn, ln);
7170 ** Look for free CCB
7172 qp = ncr_list_pop(&lp->free_ccbq);
7174 cp = list_entry(qp, struct ccb, link_ccbq);
7176 PRINT_ADDR(cmd, "ccb free list corrupted "
7180 list_add_tail(qp, &lp->wait_ccbq);
7186 ** If a CCB is available,
7187 ** Get a tag for this nexus if required.
7191 tag = lp->cb_tags[lp->ia_tag];
7193 else if (lp->actccbs > 0)
7198 ** if nothing available, take the default.
7204 ** Wait until available.
7208 if (flags & SCSI_NOSLEEP) break;
7209 if (tsleep ((caddr_t)cp, PRIBIO|PCATCH, "ncr", 0))
7220 ** Move to next available tag if tag used.
7223 if (tag != NO_TAG) {
7225 if (lp->ia_tag == MAX_TAGS)
7227 lp->tags_umap |= (((tagmap_t) 1) << tag);
7232 ** Remember all informations needed to free this CCB.
7238 if (DEBUG_FLAGS & DEBUG_TAGS) {
7239 PRINT_ADDR(cmd, "ccb @%p using tag %d.\n", cp, tag);
7245 /*==========================================================
7248 ** Release one control block
7251 **==========================================================
7254 static void ncr_free_ccb (struct ncb *np, struct ccb *cp)
7256 struct tcb *tp = &np->target[cp->target];
7257 struct lcb *lp = tp->lp[cp->lun];
7259 if (DEBUG_FLAGS & DEBUG_TAGS) {
7260 PRINT_ADDR(cp->cmd, "ccb @%p freeing tag %d.\n", cp, cp->tag);
7264 ** If lun control block available,
7265 ** decrement active commands and increment credit,
7266 ** free the tag if any and remove the JUMP for reselect.
7269 if (cp->tag != NO_TAG) {
7270 lp->cb_tags[lp->if_tag++] = cp->tag;
7271 if (lp->if_tag == MAX_TAGS)
7273 lp->tags_umap &= ~(((tagmap_t) 1) << cp->tag);
7274 lp->tags_smap &= lp->tags_umap;
7275 lp->jump_ccb[cp->tag] =
7276 cpu_to_scr(NCB_SCRIPTH_PHYS(np, bad_i_t_l_q));
7279 cpu_to_scr(NCB_SCRIPTH_PHYS(np, bad_i_t_l));
7284 ** Make this CCB available.
7289 list_move(&cp->link_ccbq, &lp->free_ccbq);
7295 cp -> host_status = HS_IDLE;
7304 wakeup ((caddr_t) cp);
7309 #define ncr_reg_bus_addr(r) (np->paddr + offsetof (struct ncr_reg, r))
7311 /*------------------------------------------------------------------------
7312 ** Initialize the fixed part of a CCB structure.
7313 **------------------------------------------------------------------------
7314 **------------------------------------------------------------------------
7316 static void ncr_init_ccb(struct ncb *np, struct ccb *cp)
7318 ncrcmd copy_4 = np->features & FE_PFEN ? SCR_COPY(4) : SCR_COPY_F(4);
7321 ** Remember virtual and bus address of this ccb.
7323 cp->p_ccb = vtobus(cp);
7324 cp->phys.header.cp = cp;
7327 ** This allows list_del to work for the default ccb.
7329 INIT_LIST_HEAD(&cp->link_ccbq);
7332 ** Initialyze the start and restart launch script.
7334 ** COPY(4) @(...p_phys), @(dsa)
7335 ** JUMP @(sched_point)
7337 cp->start.setup_dsa[0] = cpu_to_scr(copy_4);
7338 cp->start.setup_dsa[1] = cpu_to_scr(CCB_PHYS(cp, start.p_phys));
7339 cp->start.setup_dsa[2] = cpu_to_scr(ncr_reg_bus_addr(nc_dsa));
7340 cp->start.schedule.l_cmd = cpu_to_scr(SCR_JUMP);
7341 cp->start.p_phys = cpu_to_scr(CCB_PHYS(cp, phys));
7343 memcpy(&cp->restart, &cp->start, sizeof(cp->restart));
7345 cp->start.schedule.l_paddr = cpu_to_scr(NCB_SCRIPT_PHYS (np, idle));
7346 cp->restart.schedule.l_paddr = cpu_to_scr(NCB_SCRIPTH_PHYS (np, abort));
7350 /*------------------------------------------------------------------------
7351 ** Allocate a CCB and initialize its fixed part.
7352 **------------------------------------------------------------------------
7353 **------------------------------------------------------------------------
7355 static void ncr_alloc_ccb(struct ncb *np, u_char tn, u_char ln)
7357 struct tcb *tp = &np->target[tn];
7358 struct lcb *lp = tp->lp[ln];
7359 struct ccb *cp = NULL;
7362 ** Allocate memory for this CCB.
7364 cp = m_calloc_dma(sizeof(struct ccb), "CCB");
7369 ** Count it and initialyze it.
7373 memset(cp, 0, sizeof (*cp));
7374 ncr_init_ccb(np, cp);
7377 ** Chain into wakeup list and free ccb queue and take it
7378 ** into account for tagged commands.
7380 cp->link_ccb = np->ccb->link_ccb;
7381 np->ccb->link_ccb = cp;
7383 list_add(&cp->link_ccbq, &lp->free_ccbq);
7386 /*==========================================================
7389 ** Allocation of resources for Targets/Luns/Tags.
7392 **==========================================================
7396 /*------------------------------------------------------------------------
7397 ** Target control block initialisation.
7398 **------------------------------------------------------------------------
7399 ** This data structure is fully initialized after a SCSI command
7400 ** has been successfully completed for this target.
7401 ** It contains a SCRIPT that is called on target reselection.
7402 **------------------------------------------------------------------------
7404 static void ncr_init_tcb (struct ncb *np, u_char tn)
7406 struct tcb *tp = &np->target[tn];
7407 ncrcmd copy_1 = np->features & FE_PFEN ? SCR_COPY(1) : SCR_COPY_F(1);
7412 ** Jump to next tcb if SFBR does not match this target.
7413 ** JUMP IF (SFBR != #target#), @(next tcb)
7415 tp->jump_tcb.l_cmd =
7416 cpu_to_scr((SCR_JUMP ^ IFFALSE (DATA (0x80 + tn))));
7417 tp->jump_tcb.l_paddr = np->jump_tcb[th].l_paddr;
7420 ** Load the synchronous transfer register.
7421 ** COPY @(tp->sval), @(sxfer)
7423 tp->getscr[0] = cpu_to_scr(copy_1);
7424 tp->getscr[1] = cpu_to_scr(vtobus (&tp->sval));
7425 #ifdef SCSI_NCR_BIG_ENDIAN
7426 tp->getscr[2] = cpu_to_scr(ncr_reg_bus_addr(nc_sxfer) ^ 3);
7428 tp->getscr[2] = cpu_to_scr(ncr_reg_bus_addr(nc_sxfer));
7432 ** Load the timing register.
7433 ** COPY @(tp->wval), @(scntl3)
7435 tp->getscr[3] = cpu_to_scr(copy_1);
7436 tp->getscr[4] = cpu_to_scr(vtobus (&tp->wval));
7437 #ifdef SCSI_NCR_BIG_ENDIAN
7438 tp->getscr[5] = cpu_to_scr(ncr_reg_bus_addr(nc_scntl3) ^ 3);
7440 tp->getscr[5] = cpu_to_scr(ncr_reg_bus_addr(nc_scntl3));
7444 ** Get the IDENTIFY message and the lun.
7445 ** CALL @script(resel_lun)
7447 tp->call_lun.l_cmd = cpu_to_scr(SCR_CALL);
7448 tp->call_lun.l_paddr = cpu_to_scr(NCB_SCRIPT_PHYS (np, resel_lun));
7451 ** Look for the lun control block of this nexus.
7453 ** JUMP ^ IFTRUE (MASK (i, 3)), @(next_lcb)
7455 for (i = 0 ; i < 4 ; i++) {
7456 tp->jump_lcb[i].l_cmd =
7457 cpu_to_scr((SCR_JUMP ^ IFTRUE (MASK (i, 3))));
7458 tp->jump_lcb[i].l_paddr =
7459 cpu_to_scr(NCB_SCRIPTH_PHYS (np, bad_identify));
7463 ** Link this target control block to the JUMP chain.
7465 np->jump_tcb[th].l_paddr = cpu_to_scr(vtobus (&tp->jump_tcb));
7468 ** These assert's should be moved at driver initialisations.
7470 #ifdef SCSI_NCR_BIG_ENDIAN
7471 BUG_ON(((offsetof(struct ncr_reg, nc_sxfer) ^
7472 offsetof(struct tcb , sval )) &3) != 3);
7473 BUG_ON(((offsetof(struct ncr_reg, nc_scntl3) ^
7474 offsetof(struct tcb , wval )) &3) != 3);
7476 BUG_ON(((offsetof(struct ncr_reg, nc_sxfer) ^
7477 offsetof(struct tcb , sval )) &3) != 0);
7478 BUG_ON(((offsetof(struct ncr_reg, nc_scntl3) ^
7479 offsetof(struct tcb , wval )) &3) != 0);
7484 /*------------------------------------------------------------------------
7485 ** Lun control block allocation and initialization.
7486 **------------------------------------------------------------------------
7487 ** This data structure is allocated and initialized after a SCSI
7488 ** command has been successfully completed for this target/lun.
7489 **------------------------------------------------------------------------
7491 static struct lcb *ncr_alloc_lcb (struct ncb *np, u_char tn, u_char ln)
7493 struct tcb *tp = &np->target[tn];
7494 struct lcb *lp = tp->lp[ln];
7495 ncrcmd copy_4 = np->features & FE_PFEN ? SCR_COPY(4) : SCR_COPY_F(4);
7499 ** Already done, return.
7505 ** Allocate the lcb.
7507 lp = m_calloc_dma(sizeof(struct lcb), "LCB");
7510 memset(lp, 0, sizeof(*lp));
7514 ** Initialize the target control block if not yet.
7516 if (!tp->jump_tcb.l_cmd)
7517 ncr_init_tcb(np, tn);
7520 ** Initialize the CCB queue headers.
7522 INIT_LIST_HEAD(&lp->free_ccbq);
7523 INIT_LIST_HEAD(&lp->busy_ccbq);
7524 INIT_LIST_HEAD(&lp->wait_ccbq);
7525 INIT_LIST_HEAD(&lp->skip_ccbq);
7528 ** Set max CCBs to 1 and use the default 1 entry
7529 ** jump table by default.
7532 lp->jump_ccb = &lp->jump_ccb_0;
7533 lp->p_jump_ccb = cpu_to_scr(vtobus(lp->jump_ccb));
7536 ** Initilialyze the reselect script:
7538 ** Jump to next lcb if SFBR does not match this lun.
7539 ** Load TEMP with the CCB direct jump table bus address.
7540 ** Get the SIMPLE TAG message and the tag.
7542 ** JUMP IF (SFBR != #lun#), @(next lcb)
7543 ** COPY @(lp->p_jump_ccb), @(temp)
7544 ** JUMP @script(resel_notag)
7546 lp->jump_lcb.l_cmd =
7547 cpu_to_scr((SCR_JUMP ^ IFFALSE (MASK (0x80+ln, 0xff))));
7548 lp->jump_lcb.l_paddr = tp->jump_lcb[lh].l_paddr;
7550 lp->load_jump_ccb[0] = cpu_to_scr(copy_4);
7551 lp->load_jump_ccb[1] = cpu_to_scr(vtobus (&lp->p_jump_ccb));
7552 lp->load_jump_ccb[2] = cpu_to_scr(ncr_reg_bus_addr(nc_temp));
7554 lp->jump_tag.l_cmd = cpu_to_scr(SCR_JUMP);
7555 lp->jump_tag.l_paddr = cpu_to_scr(NCB_SCRIPT_PHYS (np, resel_notag));
7558 ** Link this lun control block to the JUMP chain.
7560 tp->jump_lcb[lh].l_paddr = cpu_to_scr(vtobus (&lp->jump_lcb));
7563 ** Initialize command queuing control.
7573 /*------------------------------------------------------------------------
7574 ** Lun control block setup on INQUIRY data received.
7575 **------------------------------------------------------------------------
7576 ** We only support WIDE, SYNC for targets and CMDQ for logical units.
7577 ** This setup is done on each INQUIRY since we are expecting user
7578 ** will play with CHANGE DEFINITION commands. :-)
7579 **------------------------------------------------------------------------
7581 static struct lcb *ncr_setup_lcb (struct ncb *np, struct scsi_device *sdev)
7583 unsigned char tn = sdev->id, ln = sdev->lun;
7584 struct tcb *tp = &np->target[tn];
7585 struct lcb *lp = tp->lp[ln];
7587 /* If no lcb, try to allocate it. */
7588 if (!lp && !(lp = ncr_alloc_lcb(np, tn, ln)))
7592 ** If unit supports tagged commands, allocate the
7593 ** CCB JUMP table if not yet.
7595 if (sdev->tagged_supported && lp->jump_ccb == &lp->jump_ccb_0) {
7597 lp->jump_ccb = m_calloc_dma(256, "JUMP_CCB");
7598 if (!lp->jump_ccb) {
7599 lp->jump_ccb = &lp->jump_ccb_0;
7602 lp->p_jump_ccb = cpu_to_scr(vtobus(lp->jump_ccb));
7603 for (i = 0 ; i < 64 ; i++)
7605 cpu_to_scr(NCB_SCRIPTH_PHYS (np, bad_i_t_l_q));
7606 for (i = 0 ; i < MAX_TAGS ; i++)
7608 lp->maxnxs = MAX_TAGS;
7609 lp->tags_stime = jiffies + 3*HZ;
7610 ncr_setup_tags (np, sdev);
7618 /*==========================================================
7621 ** Build Scatter Gather Block
7624 **==========================================================
7626 ** The transfer area may be scattered among
7627 ** several non adjacent physical pages.
7629 ** We may use MAX_SCATTER blocks.
7631 **----------------------------------------------------------
7635 ** We try to reduce the number of interrupts caused
7636 ** by unexpected phase changes due to disconnects.
7637 ** A typical harddisk may disconnect before ANY block.
7638 ** If we wanted to avoid unexpected phase changes at all
7639 ** we had to use a break point every 512 bytes.
7640 ** Of course the number of scatter/gather blocks is
7642 ** Under Linux, the scatter/gatter blocks are provided by
7643 ** the generic driver. We just have to copy addresses and
7644 ** sizes to the data segment array.
7647 static int ncr_scatter(struct ncb *np, struct ccb *cp, struct scsi_cmnd *cmd)
7650 int use_sg = scsi_sg_count(cmd);
7654 use_sg = map_scsi_sg_data(np, cmd);
7656 struct scatterlist *sg;
7657 struct scr_tblmove *data;
7659 if (use_sg > MAX_SCATTER) {
7660 unmap_scsi_data(np, cmd);
7664 data = &cp->phys.data[MAX_SCATTER - use_sg];
7666 scsi_for_each_sg(cmd, sg, use_sg, segment) {
7667 dma_addr_t baddr = sg_dma_address(sg);
7668 unsigned int len = sg_dma_len(sg);
7670 ncr_build_sge(np, &data[segment], baddr, len);
7671 cp->data_len += len;
7679 /*==========================================================
7682 ** Test the bus snoop logic :-(
7684 ** Has to be called with interrupts disabled.
7687 **==========================================================
7690 static int __init ncr_regtest (struct ncb* np)
7692 register volatile u32 data;
7694 ** ncr registers may NOT be cached.
7695 ** write 0xffffffff to a read only register area,
7696 ** and try to read it back.
7699 OUTL_OFF(offsetof(struct ncr_reg, nc_dstat), data);
7700 data = INL_OFF(offsetof(struct ncr_reg, nc_dstat));
7702 if (data == 0xffffffff) {
7704 if ((data & 0xe2f0fffd) != 0x02000080) {
7706 printk ("CACHE TEST FAILED: reg dstat-sstat2 readback %x.\n",
7713 static int __init ncr_snooptest (struct ncb* np)
7715 u32 ncr_rd, ncr_wr, ncr_bk, host_rd, host_wr, pc;
7718 err |= ncr_regtest (np);
7724 pc = NCB_SCRIPTH_PHYS (np, snooptest);
7728 ** Set memory and register.
7730 np->ncr_cache = cpu_to_scr(host_wr);
7731 OUTL (nc_temp, ncr_wr);
7733 ** Start script (exchange values)
7737 ** Wait 'til done (with timeout)
7739 for (i=0; i<NCR_SNOOP_TIMEOUT; i++)
7740 if (INB(nc_istat) & (INTF|SIP|DIP))
7743 ** Save termination position.
7747 ** Read memory and register.
7749 host_rd = scr_to_cpu(np->ncr_cache);
7750 ncr_rd = INL (nc_scratcha);
7751 ncr_bk = INL (nc_temp);
7755 ncr_chip_reset(np, 100);
7757 ** check for timeout
7759 if (i>=NCR_SNOOP_TIMEOUT) {
7760 printk ("CACHE TEST FAILED: timeout.\n");
7764 ** Check termination position.
7766 if (pc != NCB_SCRIPTH_PHYS (np, snoopend)+8) {
7767 printk ("CACHE TEST FAILED: script execution failed.\n");
7768 printk ("start=%08lx, pc=%08lx, end=%08lx\n",
7769 (u_long) NCB_SCRIPTH_PHYS (np, snooptest), (u_long) pc,
7770 (u_long) NCB_SCRIPTH_PHYS (np, snoopend) +8);
7776 if (host_wr != ncr_rd) {
7777 printk ("CACHE TEST FAILED: host wrote %d, ncr read %d.\n",
7778 (int) host_wr, (int) ncr_rd);
7781 if (host_rd != ncr_wr) {
7782 printk ("CACHE TEST FAILED: ncr wrote %d, host read %d.\n",
7783 (int) ncr_wr, (int) host_rd);
7786 if (ncr_bk != ncr_wr) {
7787 printk ("CACHE TEST FAILED: ncr wrote %d, read back %d.\n",
7788 (int) ncr_wr, (int) ncr_bk);
7794 /*==========================================================
7796 ** Determine the ncr's clock frequency.
7797 ** This is essential for the negotiation
7798 ** of the synchronous transfer rate.
7800 **==========================================================
7802 ** Note: we have to return the correct value.
7803 ** THERE IS NO SAFE DEFAULT VALUE.
7805 ** Most NCR/SYMBIOS boards are delivered with a 40 Mhz clock.
7806 ** 53C860 and 53C875 rev. 1 support fast20 transfers but
7807 ** do not have a clock doubler and so are provided with a
7808 ** 80 MHz clock. All other fast20 boards incorporate a doubler
7809 ** and so should be delivered with a 40 MHz clock.
7810 ** The future fast40 chips (895/895) use a 40 Mhz base clock
7811 ** and provide a clock quadrupler (160 Mhz). The code below
7812 ** tries to deal as cleverly as possible with all this stuff.
7814 **----------------------------------------------------------
7818 * Select NCR SCSI clock frequency
7820 static void ncr_selectclock(struct ncb *np, u_char scntl3)
7822 if (np->multiplier < 2) {
7823 OUTB(nc_scntl3, scntl3);
7827 if (bootverbose >= 2)
7828 printk ("%s: enabling clock multiplier\n", ncr_name(np));
7830 OUTB(nc_stest1, DBLEN); /* Enable clock multiplier */
7831 if (np->multiplier > 2) { /* Poll bit 5 of stest4 for quadrupler */
7833 while (!(INB(nc_stest4) & LCKFRQ) && --i > 0)
7836 printk("%s: the chip cannot lock the frequency\n", ncr_name(np));
7837 } else /* Wait 20 micro-seconds for doubler */
7839 OUTB(nc_stest3, HSC); /* Halt the scsi clock */
7840 OUTB(nc_scntl3, scntl3);
7841 OUTB(nc_stest1, (DBLEN|DBLSEL));/* Select clock multiplier */
7842 OUTB(nc_stest3, 0x00); /* Restart scsi clock */
7847 * calculate NCR SCSI clock frequency (in KHz)
7849 static unsigned __init ncrgetfreq (struct ncb *np, int gen)
7855 * Measure GEN timer delay in order
7856 * to calculate SCSI clock frequency
7858 * This code will never execute too
7859 * many loop iterations (if DELAY is
7860 * reasonably correct). It could get
7861 * too low a delay (too high a freq.)
7862 * if the CPU is slow executing the
7863 * loop for some reason (an NMI, for
7864 * example). For this reason we will
7865 * if multiple measurements are to be
7866 * performed trust the higher delay
7867 * (lower frequency returned).
7869 OUTB (nc_stest1, 0); /* make sure clock doubler is OFF */
7870 OUTW (nc_sien , 0); /* mask all scsi interrupts */
7871 (void) INW (nc_sist); /* clear pending scsi interrupt */
7872 OUTB (nc_dien , 0); /* mask all dma interrupts */
7873 (void) INW (nc_sist); /* another one, just to be sure :) */
7874 OUTB (nc_scntl3, 4); /* set pre-scaler to divide by 3 */
7875 OUTB (nc_stime1, 0); /* disable general purpose timer */
7876 OUTB (nc_stime1, gen); /* set to nominal delay of 1<<gen * 125us */
7877 while (!(INW(nc_sist) & GEN) && ms++ < 100000) {
7878 for (count = 0; count < 10; count ++)
7879 udelay(100); /* count ms */
7881 OUTB (nc_stime1, 0); /* disable general purpose timer */
7883 * set prescaler to divide by whatever 0 means
7884 * 0 ought to choose divide by 2, but appears
7885 * to set divide by 3.5 mode in my 53c810 ...
7887 OUTB (nc_scntl3, 0);
7889 if (bootverbose >= 2)
7890 printk ("%s: Delay (GEN=%d): %u msec\n", ncr_name(np), gen, ms);
7892 * adjust for prescaler, and convert into KHz
7894 return ms ? ((1 << gen) * 4340) / ms : 0;
7898 * Get/probe NCR SCSI clock frequency
7900 static void __init ncr_getclock (struct ncb *np, int mult)
7902 unsigned char scntl3 = INB(nc_scntl3);
7903 unsigned char stest1 = INB(nc_stest1);
7910 ** True with 875 or 895 with clock multiplier selected
7912 if (mult > 1 && (stest1 & (DBLEN+DBLSEL)) == DBLEN+DBLSEL) {
7913 if (bootverbose >= 2)
7914 printk ("%s: clock multiplier found\n", ncr_name(np));
7915 np->multiplier = mult;
7919 ** If multiplier not found or scntl3 not 7,5,3,
7920 ** reset chip and get frequency from general purpose timer.
7921 ** Otherwise trust scntl3 BIOS setting.
7923 if (np->multiplier != mult || (scntl3 & 7) < 3 || !(scntl3 & 1)) {
7926 ncr_chip_reset(np, 5);
7928 (void) ncrgetfreq (np, 11); /* throw away first result */
7929 f1 = ncrgetfreq (np, 11);
7930 f2 = ncrgetfreq (np, 11);
7933 printk ("%s: NCR clock is %uKHz, %uKHz\n", ncr_name(np), f1, f2);
7935 if (f1 > f2) f1 = f2; /* trust lower result */
7937 if (f1 < 45000) f1 = 40000;
7938 else if (f1 < 55000) f1 = 50000;
7941 if (f1 < 80000 && mult > 1) {
7942 if (bootverbose >= 2)
7943 printk ("%s: clock multiplier assumed\n", ncr_name(np));
7944 np->multiplier = mult;
7947 if ((scntl3 & 7) == 3) f1 = 40000;
7948 else if ((scntl3 & 7) == 5) f1 = 80000;
7951 f1 /= np->multiplier;
7955 ** Compute controller synchronous parameters.
7957 f1 *= np->multiplier;
7961 /*===================== LINUX ENTRY POINTS SECTION ==========================*/
7963 static int ncr53c8xx_slave_alloc(struct scsi_device *device)
7965 struct Scsi_Host *host = device->host;
7966 struct ncb *np = ((struct host_data *) host->hostdata)->ncb;
7967 struct tcb *tp = &np->target[device->id];
7968 tp->starget = device->sdev_target;
7973 static int ncr53c8xx_slave_configure(struct scsi_device *device)
7975 struct Scsi_Host *host = device->host;
7976 struct ncb *np = ((struct host_data *) host->hostdata)->ncb;
7977 struct tcb *tp = &np->target[device->id];
7978 struct lcb *lp = tp->lp[device->lun];
7979 int numtags, depth_to_use;
7981 ncr_setup_lcb(np, device);
7984 ** Select queue depth from driver setup.
7985 ** Donnot use more than configured by user.
7987 ** Donnot use more than our maximum.
7989 numtags = device_queue_depth(np->unit, device->id, device->lun);
7990 if (numtags > tp->usrtags)
7991 numtags = tp->usrtags;
7992 if (!device->tagged_supported)
7994 depth_to_use = numtags;
7995 if (depth_to_use < 2)
7997 if (depth_to_use > MAX_TAGS)
7998 depth_to_use = MAX_TAGS;
8000 scsi_adjust_queue_depth(device,
8001 (device->tagged_supported ?
8002 MSG_SIMPLE_TAG : 0),
8006 ** Since the queue depth is not tunable under Linux,
8007 ** we need to know this value in order not to
8008 ** announce stupid things to user.
8010 ** XXX(hch): As of Linux 2.6 it certainly _is_ tunable..
8011 ** In fact we just tuned it, or did I miss
8012 ** something important? :)
8015 lp->numtags = lp->maxtags = numtags;
8016 lp->scdev_depth = depth_to_use;
8018 ncr_setup_tags (np, device);
8020 #ifdef DEBUG_NCR53C8XX
8021 printk("ncr53c8xx_select_queue_depth: host=%d, id=%d, lun=%d, depth=%d\n",
8022 np->unit, device->id, device->lun, depth_to_use);
8025 if (spi_support_sync(device->sdev_target) &&
8026 !spi_initial_dv(device->sdev_target))
8027 spi_dv_device(device);
8031 static int ncr53c8xx_queue_command (struct scsi_cmnd *cmd, void (* done)(struct scsi_cmnd *))
8033 struct ncb *np = ((struct host_data *) cmd->device->host->hostdata)->ncb;
8034 unsigned long flags;
8037 #ifdef DEBUG_NCR53C8XX
8038 printk("ncr53c8xx_queue_command\n");
8041 cmd->scsi_done = done;
8042 cmd->host_scribble = NULL;
8043 cmd->__data_mapped = 0;
8044 cmd->__data_mapping = 0;
8046 spin_lock_irqsave(&np->smp_lock, flags);
8048 if ((sts = ncr_queue_command(np, cmd)) != DID_OK) {
8049 cmd->result = ScsiResult(sts, 0);
8050 #ifdef DEBUG_NCR53C8XX
8051 printk("ncr53c8xx : command not queued - result=%d\n", sts);
8054 #ifdef DEBUG_NCR53C8XX
8056 printk("ncr53c8xx : command successfully queued\n");
8059 spin_unlock_irqrestore(&np->smp_lock, flags);
8061 if (sts != DID_OK) {
8062 unmap_scsi_data(np, cmd);
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(unsigned long npref)
8099 struct ncb *np = (struct ncb *) npref;
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: command pid %lu\n", cmd->serial_number);
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 wcmd->result = ScsiResult(sts, 0);
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;
8317 tpnt->use_clustering = ENABLE_CLUSTERING;
8319 if (device->differential)
8320 driver_setup.diff_support = device->differential;
8322 printk(KERN_INFO "ncr53c720-%d: rev 0x%x irq %d\n",
8323 unit, device->chip.revision_id, device->slot.irq);
8325 instance = scsi_host_alloc(tpnt, sizeof(*host_data));
8328 host_data = (struct host_data *) instance->hostdata;
8330 np = __m_calloc_dma(device->dev, sizeof(struct ncb), "NCB");
8333 spin_lock_init(&np->smp_lock);
8334 np->dev = device->dev;
8335 np->p_ncb = vtobus(np);
8336 host_data->ncb = np;
8338 np->ccb = m_calloc_dma(sizeof(struct ccb), "CCB");
8342 /* Store input information in the host data structure. */
8344 np->verbose = driver_setup.verbose;
8345 sprintf(np->inst_name, "ncr53c720-%d", np->unit);
8346 np->revision_id = device->chip.revision_id;
8347 np->features = device->chip.features;
8348 np->clock_divn = device->chip.nr_divisor;
8349 np->maxoffs = device->chip.offset_max;
8350 np->maxburst = device->chip.burst_max;
8351 np->myaddr = device->host_id;
8353 /* Allocate SCRIPTS areas. */
8354 np->script0 = m_calloc_dma(sizeof(struct script), "SCRIPT");
8357 np->scripth0 = m_calloc_dma(sizeof(struct scripth), "SCRIPTH");
8361 init_timer(&np->timer);
8362 np->timer.data = (unsigned long) np;
8363 np->timer.function = ncr53c8xx_timeout;
8365 /* Try to map the controller chip to virtual and physical memory. */
8367 np->paddr = device->slot.base;
8368 np->paddr2 = (np->features & FE_RAM) ? device->slot.base_2 : 0;
8370 if (device->slot.base_v)
8371 np->vaddr = device->slot.base_v;
8373 np->vaddr = ioremap(device->slot.base_c, 128);
8377 "%s: can't map memory mapped IO region\n",ncr_name(np));
8380 if (bootverbose > 1)
8382 "%s: using memory mapped IO at virtual address 0x%lx\n", ncr_name(np), (u_long) np->vaddr);
8385 /* Make the controller's registers available. Now the INB INW INL
8386 * OUTB OUTW OUTL macros can be used safely.
8389 np->reg = (struct ncr_reg __iomem *)np->vaddr;
8391 /* Do chip dependent initialization. */
8392 ncr_prepare_setting(np);
8394 if (np->paddr2 && sizeof(struct script) > 4096) {
8396 printk(KERN_WARNING "%s: script too large, NOT using on chip RAM.\n",
8400 instance->max_channel = 0;
8401 instance->this_id = np->myaddr;
8402 instance->max_id = np->maxwide ? 16 : 8;
8403 instance->max_lun = SCSI_NCR_MAX_LUN;
8404 instance->base = (unsigned long) np->reg;
8405 instance->irq = device->slot.irq;
8406 instance->unique_id = device->slot.base;
8407 instance->dma_channel = 0;
8408 instance->cmd_per_lun = MAX_TAGS;
8409 instance->can_queue = (MAX_START-4);
8410 /* This can happen if you forget to call ncr53c8xx_init from
8411 * your module_init */
8412 BUG_ON(!ncr53c8xx_transport_template);
8413 instance->transportt = ncr53c8xx_transport_template;
8415 /* Patch script to physical addresses */
8416 ncr_script_fill(&script0, &scripth0);
8418 np->scripth = np->scripth0;
8419 np->p_scripth = vtobus(np->scripth);
8420 np->p_script = (np->paddr2) ? np->paddr2 : vtobus(np->script0);
8422 ncr_script_copy_and_bind(np, (ncrcmd *) &script0,
8423 (ncrcmd *) np->script0, sizeof(struct script));
8424 ncr_script_copy_and_bind(np, (ncrcmd *) &scripth0,
8425 (ncrcmd *) np->scripth0, sizeof(struct scripth));
8426 np->ccb->p_ccb = vtobus (np->ccb);
8428 /* Patch the script for LED support. */
8430 if (np->features & FE_LED0) {
8431 np->script0->idle[0] =
8432 cpu_to_scr(SCR_REG_REG(gpreg, SCR_OR, 0x01));
8433 np->script0->reselected[0] =
8434 cpu_to_scr(SCR_REG_REG(gpreg, SCR_AND, 0xfe));
8435 np->script0->start[0] =
8436 cpu_to_scr(SCR_REG_REG(gpreg, SCR_AND, 0xfe));
8440 * Look for the target control block of this nexus.
8442 * JUMP ^ IFTRUE (MASK (i, 3)), @(next_lcb)
8444 for (i = 0 ; i < 4 ; i++) {
8445 np->jump_tcb[i].l_cmd =
8446 cpu_to_scr((SCR_JUMP ^ IFTRUE (MASK (i, 3))));
8447 np->jump_tcb[i].l_paddr =
8448 cpu_to_scr(NCB_SCRIPTH_PHYS (np, bad_target));
8451 ncr_chip_reset(np, 100);
8453 /* Now check the cache handling of the chipset. */
8455 if (ncr_snooptest(np)) {
8456 printk(KERN_ERR "CACHE INCORRECTLY CONFIGURED.\n");
8460 /* Install the interrupt handler. */
8461 np->irq = device->slot.irq;
8463 /* Initialize the fixed part of the default ccb. */
8464 ncr_init_ccb(np, np->ccb);
8467 * After SCSI devices have been opened, we cannot reset the bus
8468 * safely, so we do it here. Interrupt handler does the real work.
8469 * Process the reset exception if interrupts are not enabled yet.
8470 * Then enable disconnects.
8472 spin_lock_irqsave(&np->smp_lock, flags);
8473 if (ncr_reset_scsi_bus(np, 0, driver_setup.settle_delay) != 0) {
8474 printk(KERN_ERR "%s: FATAL ERROR: CHECK SCSI BUS - CABLES, TERMINATION, DEVICE POWER etc.!\n", ncr_name(np));
8476 spin_unlock_irqrestore(&np->smp_lock, flags);
8484 * The middle-level SCSI driver does not wait for devices to settle.
8485 * Wait synchronously if more than 2 seconds.
8487 if (driver_setup.settle_delay > 2) {
8488 printk(KERN_INFO "%s: waiting %d seconds for scsi devices to settle...\n",
8489 ncr_name(np), driver_setup.settle_delay);
8490 mdelay(1000 * driver_setup.settle_delay);
8493 /* start the timeout daemon */
8497 /* use SIMPLE TAG messages by default */
8498 #ifdef SCSI_NCR_ALWAYS_SIMPLE_TAG
8499 np->order = SIMPLE_QUEUE_TAG;
8502 spin_unlock_irqrestore(&np->smp_lock, flags);
8509 printk(KERN_INFO "%s: detaching...\n", ncr_name(np));
8513 m_free_dma(np->scripth0, sizeof(struct scripth), "SCRIPTH");
8515 m_free_dma(np->script0, sizeof(struct script), "SCRIPT");
8517 m_free_dma(np->ccb, sizeof(struct ccb), "CCB");
8518 m_free_dma(np, sizeof(struct ncb), "NCB");
8519 host_data->ncb = NULL;
8522 scsi_host_put(instance);
8528 void ncr53c8xx_release(struct Scsi_Host *host)
8530 struct host_data *host_data = shost_priv(host);
8531 #ifdef DEBUG_NCR53C8XX
8532 printk("ncr53c8xx: release\n");
8535 ncr_detach(host_data->ncb);
8536 scsi_host_put(host);
8539 static void ncr53c8xx_set_period(struct scsi_target *starget, int period)
8541 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
8542 struct ncb *np = ((struct host_data *)shost->hostdata)->ncb;
8543 struct tcb *tp = &np->target[starget->id];
8545 if (period > np->maxsync)
8546 period = np->maxsync;
8547 else if (period < np->minsync)
8548 period = np->minsync;
8550 tp->usrsync = period;
8552 ncr_negotiate(np, tp);
8555 static void ncr53c8xx_set_offset(struct scsi_target *starget, int offset)
8557 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
8558 struct ncb *np = ((struct host_data *)shost->hostdata)->ncb;
8559 struct tcb *tp = &np->target[starget->id];
8561 if (offset > np->maxoffs)
8562 offset = np->maxoffs;
8563 else if (offset < 0)
8566 tp->maxoffs = offset;
8568 ncr_negotiate(np, tp);
8571 static void ncr53c8xx_set_width(struct scsi_target *starget, int width)
8573 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
8574 struct ncb *np = ((struct host_data *)shost->hostdata)->ncb;
8575 struct tcb *tp = &np->target[starget->id];
8577 if (width > np->maxwide)
8578 width = np->maxwide;
8582 tp->usrwide = width;
8584 ncr_negotiate(np, tp);
8587 static void ncr53c8xx_get_signalling(struct Scsi_Host *shost)
8589 struct ncb *np = ((struct host_data *)shost->hostdata)->ncb;
8590 enum spi_signal_type type;
8592 switch (np->scsi_mode) {
8594 type = SPI_SIGNAL_SE;
8597 type = SPI_SIGNAL_HVD;
8600 type = SPI_SIGNAL_UNKNOWN;
8603 spi_signalling(shost) = type;
8606 static struct spi_function_template ncr53c8xx_transport_functions = {
8607 .set_period = ncr53c8xx_set_period,
8609 .set_offset = ncr53c8xx_set_offset,
8611 .set_width = ncr53c8xx_set_width,
8613 .get_signalling = ncr53c8xx_get_signalling,
8616 int __init ncr53c8xx_init(void)
8618 ncr53c8xx_transport_template = spi_attach_transport(&ncr53c8xx_transport_functions);
8619 if (!ncr53c8xx_transport_template)
8624 void ncr53c8xx_exit(void)
8626 spi_release_transport(ncr53c8xx_transport_template);