4
* Device Driver for Tekram DC395(U/UW/F), DC315(U)
5
* PCI SCSI Bus Master Host Adapter
6
* (SCSI chip set used Tekram ASIC TRM-S1040)
9
* C.L. Huang <ching@tekram.com.tw>
10
* Erich Chen <erich@tekram.com.tw>
11
* (C) Copyright 1995-1999 Tekram Technology Co., Ltd.
13
* Kurt Garloff <garloff@suse.de>
14
* (C) 1999-2000 Kurt Garloff
16
* Oliver Neukum <oliver@neukum.name>
17
* Ali Akcaagac <aliakc@web.de>
18
* Jamie Lenehan <lenehan@twibble.org>
23
*************************************************************************
25
* Redistribution and use in source and binary forms, with or without
26
* modification, are permitted provided that the following conditions
28
* 1. Redistributions of source code must retain the above copyright
29
* notice, this list of conditions and the following disclaimer.
30
* 2. Redistributions in binary form must reproduce the above copyright
31
* notice, this list of conditions and the following disclaimer in the
32
* documentation and/or other materials provided with the distribution.
33
* 3. The name of the author may not be used to endorse or promote products
34
* derived from this software without specific prior written permission.
36
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
37
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
38
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
39
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
40
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
41
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
42
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
43
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
44
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
45
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
47
************************************************************************
49
#include <linux/module.h>
50
#include <linux/moduleparam.h>
51
#include <linux/delay.h>
52
#include <linux/ctype.h>
53
#include <linux/blkdev.h>
54
#include <linux/interrupt.h>
55
#include <linux/init.h>
56
#include <linux/spinlock.h>
57
#include <linux/pci.h>
58
#include <linux/list.h>
59
#include <linux/vmalloc.h>
60
#include <linux/slab.h>
63
#include <scsi/scsi.h>
64
#include <scsi/scsicam.h> /* needed for scsicam_bios_param */
65
#include <scsi/scsi_cmnd.h>
66
#include <scsi/scsi_device.h>
67
#include <scsi/scsi_host.h>
71
#define DC395X_NAME "dc395x"
72
#define DC395X_BANNER "Tekram DC395(U/UW/F), DC315(U) - ASIC TRM-S1040"
73
#define DC395X_VERSION "v2.05, 2004/03/08"
75
/*---------------------------------------------------------------------------
77
---------------------------------------------------------------------------*/
79
* Set to disable parts of the driver
81
/*#define DC395x_NO_DISCONNECT*/
82
/*#define DC395x_NO_TAGQ*/
83
/*#define DC395x_NO_SYNC*/
84
/*#define DC395x_NO_WIDE*/
86
/*---------------------------------------------------------------------------
88
---------------------------------------------------------------------------*/
90
* Types of debugging that can be enabled and disabled
96
#define DBG_FIFO 0x0040
97
#define DBG_PIO 0x0080
101
* Set set of things to output debugging for.
102
* Undefine to remove all debugging
104
/*#define DEBUG_MASK (DBG_0|DBG_1|DBG_SG|DBG_FIFO|DBG_PIO)*/
105
/*#define DEBUG_MASK DBG_0*/
109
* Output a kernel mesage at the specified level and append the
110
* driver name and a ": " to the start of the message
112
#define dprintkl(level, format, arg...) \
113
printk(level DC395X_NAME ": " format , ## arg)
118
* print a debug message - this is formated with KERN_DEBUG, then the
119
* driver name followed by a ": " and then the message is output.
120
* This also checks that the specified debug level is enabled before
121
* outputing the message
123
#define dprintkdbg(type, format, arg...) \
125
if ((type) & (DEBUG_MASK)) \
126
dprintkl(KERN_DEBUG , format , ## arg); \
130
* Check if the specified type of debugging is enabled
132
#define debug_enabled(type) ((DEBUG_MASK) & (type))
136
* No debugging. Do nothing
138
#define dprintkdbg(type, format, arg...) \
140
#define debug_enabled(type) (0)
145
#ifndef PCI_VENDOR_ID_TEKRAM
146
#define PCI_VENDOR_ID_TEKRAM 0x1DE1 /* Vendor ID */
148
#ifndef PCI_DEVICE_ID_TEKRAM_TRMS1040
149
#define PCI_DEVICE_ID_TEKRAM_TRMS1040 0x0391 /* Device ID */
153
#define DC395x_LOCK_IO(dev,flags) spin_lock_irqsave(((struct Scsi_Host *)dev)->host_lock, flags)
154
#define DC395x_UNLOCK_IO(dev,flags) spin_unlock_irqrestore(((struct Scsi_Host *)dev)->host_lock, flags)
156
#define DC395x_read8(acb,address) (u8)(inb(acb->io_port_base + (address)))
157
#define DC395x_read16(acb,address) (u16)(inw(acb->io_port_base + (address)))
158
#define DC395x_read32(acb,address) (u32)(inl(acb->io_port_base + (address)))
159
#define DC395x_write8(acb,address,value) outb((value), acb->io_port_base + (address))
160
#define DC395x_write16(acb,address,value) outw((value), acb->io_port_base + (address))
161
#define DC395x_write32(acb,address,value) outl((value), acb->io_port_base + (address))
164
#define RES_TARGET 0x000000FF /* Target State */
165
#define RES_TARGET_LNX STATUS_MASK /* Only official ... */
166
#define RES_ENDMSG 0x0000FF00 /* End Message */
167
#define RES_DID 0x00FF0000 /* DID_ codes */
168
#define RES_DRV 0xFF000000 /* DRIVER_ codes */
170
#define MK_RES(drv,did,msg,tgt) ((int)(drv)<<24 | (int)(did)<<16 | (int)(msg)<<8 | (int)(tgt))
171
#define MK_RES_LNX(drv,did,msg,tgt) ((int)(drv)<<24 | (int)(did)<<16 | (int)(msg)<<8 | (int)(tgt)<<1)
173
#define SET_RES_TARGET(who,tgt) { who &= ~RES_TARGET; who |= (int)(tgt); }
174
#define SET_RES_TARGET_LNX(who,tgt) { who &= ~RES_TARGET_LNX; who |= (int)(tgt) << 1; }
175
#define SET_RES_MSG(who,msg) { who &= ~RES_ENDMSG; who |= (int)(msg) << 8; }
176
#define SET_RES_DID(who,did) { who &= ~RES_DID; who |= (int)(did) << 16; }
177
#define SET_RES_DRV(who,drv) { who &= ~RES_DRV; who |= (int)(drv) << 24; }
182
* srb->segement_x is the hw sg list. It is always allocated as a
183
* DC395x_MAX_SG_LISTENTRY entries in a linear block which does not
184
* cross a page boundy.
186
#define SEGMENTX_LEN (sizeof(struct SGentry)*DC395x_MAX_SG_LISTENTRY)
190
u32 address; /* bus! address */
194
/* The SEEPROM structure for TRM_S1040 */
196
u8 cfg0; /* Target configuration byte 0 */
197
u8 period; /* Target period */
198
u8 cfg2; /* Target configuration byte 2 */
199
u8 cfg3; /* Target configuration byte 3 */
203
u8 sub_vendor_id[2]; /* 0,1 Sub Vendor ID */
204
u8 sub_sys_id[2]; /* 2,3 Sub System ID */
205
u8 sub_class; /* 4 Sub Class */
206
u8 vendor_id[2]; /* 5,6 Vendor ID */
207
u8 device_id[2]; /* 7,8 Device ID */
208
u8 reserved; /* 9 Reserved */
209
struct NVRamTarget target[DC395x_MAX_SCSI_ID];
216
u8 scsi_id; /* 74 Host Adapter SCSI ID */
217
u8 channel_cfg; /* 75 Channel configuration */
218
u8 delay_time; /* 76 Power on delay time */
219
u8 max_tag; /* 77 Maximum tags */
220
u8 reserved0; /* 78 */
221
u8 boot_target; /* 79 */
222
u8 boot_lun; /* 80 */
223
u8 reserved1; /* 81 */
224
u16 reserved2[22]; /* 82,..125 */
225
u16 cksum; /* 126,127 */
229
struct list_head list; /* next/prev ptrs for srb lists */
230
struct DeviceCtlBlk *dcb;
231
struct scsi_cmnd *cmd;
233
struct SGentry *segment_x; /* Linear array of hw sg entries (up to 64 entries) */
234
dma_addr_t sg_bus_addr; /* Bus address of sg list (ie, of segment_x) */
236
u8 sg_count; /* No of HW sg entries for this request */
237
u8 sg_index; /* Index of HW sg entry for this request */
238
size_t total_xfer_length; /* Total number of bytes remaining to be transferred */
239
size_t request_length; /* Total number of bytes in this request */
241
* The sense buffer handling function, request_sense, uses
242
* the first hw sg entry (segment_x[0]) and the transfer
243
* length (total_xfer_length). While doing this it stores the
244
* original values into the last sg hw list
245
* (srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1] and the
246
* total_xfer_length in xferred. These values are restored in
247
* pci_unmap_srb_sense. This is the only place xferred is used.
249
size_t xferred; /* Saved copy of total_xfer_length */
269
struct DeviceCtlBlk {
270
struct list_head list; /* next/prev ptrs for the dcb list */
271
struct AdapterCtlBlk *acb;
272
struct list_head srb_going_list; /* head of going srb list */
273
struct list_head srb_waiting_list; /* head of waiting srb list */
275
struct ScsiReqBlk *active_srb;
280
u8 target_id; /* SCSI Target ID (SCSI Only) */
281
u8 target_lun; /* SCSI Log. Unit (SCSI Only) */
285
u8 inquiry7; /* To store Inquiry flags */
286
u8 sync_mode; /* 0:async mode */
287
u8 min_nego_period; /* for nego. */
288
u8 sync_period; /* for reg. */
290
u8 sync_offset; /* for reg. and nego.(low nibble) */
296
struct AdapterCtlBlk {
297
struct Scsi_Host *scsi_host;
299
unsigned long io_port_base;
300
unsigned long io_port_len;
302
struct list_head dcb_list; /* head of going dcb list */
303
struct DeviceCtlBlk *dcb_run_robin;
304
struct DeviceCtlBlk *active_dcb;
306
struct list_head srb_free_list; /* head of free srb list */
307
struct ScsiReqBlk *tmp_srb;
308
struct timer_list waiting_timer;
309
struct timer_list selto_timer;
315
unsigned int irq_level;
325
u8 dcb_map[DC395x_MAX_SCSI_ID];
326
struct DeviceCtlBlk *children[DC395x_MAX_SCSI_ID][32];
332
struct ScsiReqBlk srb_array[DC395x_MAX_SRB_CNT];
333
struct ScsiReqBlk srb;
335
struct NvRamType eeprom; /* eeprom settings for this adapter */
339
/*---------------------------------------------------------------------------
341
---------------------------------------------------------------------------*/
342
static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
344
static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
346
static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
348
static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
350
static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
352
static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
354
static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
356
static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
358
static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
360
static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
362
static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
364
static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
366
static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
368
static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
370
static void set_basic_config(struct AdapterCtlBlk *acb);
371
static void cleanup_after_transfer(struct AdapterCtlBlk *acb,
372
struct ScsiReqBlk *srb);
373
static void reset_scsi_bus(struct AdapterCtlBlk *acb);
374
static void data_io_transfer(struct AdapterCtlBlk *acb,
375
struct ScsiReqBlk *srb, u16 io_dir);
376
static void disconnect(struct AdapterCtlBlk *acb);
377
static void reselect(struct AdapterCtlBlk *acb);
378
static u8 start_scsi(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
379
struct ScsiReqBlk *srb);
380
static inline void enable_msgout_abort(struct AdapterCtlBlk *acb,
381
struct ScsiReqBlk *srb);
382
static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb,
383
struct ScsiReqBlk *srb);
384
static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_code,
385
struct scsi_cmnd *cmd, u8 force);
386
static void scsi_reset_detect(struct AdapterCtlBlk *acb);
387
static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb);
388
static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb,
389
struct ScsiReqBlk *srb);
390
static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
391
struct ScsiReqBlk *srb);
392
static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
393
struct ScsiReqBlk *srb);
394
static void set_xfer_rate(struct AdapterCtlBlk *acb,
395
struct DeviceCtlBlk *dcb);
396
static void waiting_timeout(unsigned long ptr);
399
/*---------------------------------------------------------------------------
401
---------------------------------------------------------------------------*/
402
static u16 current_sync_offset = 0;
404
static void *dc395x_scsi_phase0[] = {
405
data_out_phase0,/* phase:0 */
406
data_in_phase0, /* phase:1 */
407
command_phase0, /* phase:2 */
408
status_phase0, /* phase:3 */
409
nop0, /* phase:4 PH_BUS_FREE .. initial phase */
410
nop0, /* phase:5 PH_BUS_FREE .. initial phase */
411
msgout_phase0, /* phase:6 */
412
msgin_phase0, /* phase:7 */
415
static void *dc395x_scsi_phase1[] = {
416
data_out_phase1,/* phase:0 */
417
data_in_phase1, /* phase:1 */
418
command_phase1, /* phase:2 */
419
status_phase1, /* phase:3 */
420
nop1, /* phase:4 PH_BUS_FREE .. initial phase */
421
nop1, /* phase:5 PH_BUS_FREE .. initial phase */
422
msgout_phase1, /* phase:6 */
423
msgin_phase1, /* phase:7 */
427
*Fast20: 000 50ns, 20.0 MHz
429
* 010 100ns, 10.0 MHz
436
*Fast40(LVDS): 000 25ns, 40.0 MHz
439
* 011 100ns, 10.0 MHz
445
/*static u8 clock_period[] = {12,19,25,31,37,44,50,62};*/
447
/* real period:48ns,76ns,100ns,124ns,148ns,176ns,200ns,248ns */
448
static u8 clock_period[] = { 12, 18, 25, 31, 37, 43, 50, 62 };
449
static u16 clock_speed[] = { 200, 133, 100, 80, 67, 58, 50, 40 };
452
/*---------------------------------------------------------------------------
454
---------------------------------------------------------------------------*/
456
* Module/boot parameters currently effect *all* instances of the
457
* card in the system.
461
* Command line parameters are stored in a structure below.
462
* These are the index's into the structure for the various
463
* command line options.
465
#define CFG_ADAPTER_ID 0
466
#define CFG_MAX_SPEED 1
467
#define CFG_DEV_MODE 2
468
#define CFG_ADAPTER_MODE 3
470
#define CFG_RESET_DELAY 5
472
#define CFG_NUM 6 /* number of configuration items */
476
* Value used to indicate that a command line override
477
* hasn't been used to modify the value.
479
#define CFG_PARAM_UNSET -1
483
* Hold command line parameters.
485
struct ParameterData {
486
int value; /* value of this setting */
487
int min; /* minimum value */
488
int max; /* maximum value */
489
int def; /* default value */
490
int safe; /* safe value */
492
static struct ParameterData __devinitdata cfg_data[] = {
511
NTC_DO_PARITY_CHK | NTC_DO_DISCONNECT | NTC_DO_SYNC_NEGO |
512
NTC_DO_WIDE_NEGO | NTC_DO_TAG_QUEUEING |
514
NTC_DO_PARITY_CHK | NTC_DO_SEND_START
520
#ifdef CONFIG_SCSI_MULTI_LUN
523
NAC_GT2DRIVES | NAC_GREATER_1G | NAC_POWERON_SCSI_RESET
524
/*| NAC_ACTIVE_NEG*/,
525
NAC_GT2DRIVES | NAC_GREATER_1G | NAC_POWERON_SCSI_RESET | 0x08
531
3, /* 16 tags (??) */
545
* Safe settings. If set to zero the BIOS/default values with
546
* command line overrides will be used. If set to 1 then safe and
547
* slow settings will be used.
549
static int use_safe_settings = 0;
550
module_param_named(safe, use_safe_settings, bool, 0);
551
MODULE_PARM_DESC(safe, "Use safe and slow settings only. Default: false");
554
module_param_named(adapter_id, cfg_data[CFG_ADAPTER_ID].value, int, 0);
555
MODULE_PARM_DESC(adapter_id, "Adapter SCSI ID. Default 7 (0-15)");
557
module_param_named(max_speed, cfg_data[CFG_MAX_SPEED].value, int, 0);
558
MODULE_PARM_DESC(max_speed, "Maximum bus speed. Default 1 (0-7) Speeds: 0=20, 1=13.3, 2=10, 3=8, 4=6.7, 5=5.8, 6=5, 7=4 Mhz");
560
module_param_named(dev_mode, cfg_data[CFG_DEV_MODE].value, int, 0);
561
MODULE_PARM_DESC(dev_mode, "Device mode.");
563
module_param_named(adapter_mode, cfg_data[CFG_ADAPTER_MODE].value, int, 0);
564
MODULE_PARM_DESC(adapter_mode, "Adapter mode.");
566
module_param_named(tags, cfg_data[CFG_TAGS].value, int, 0);
567
MODULE_PARM_DESC(tags, "Number of tags (1<<x). Default 3 (0-5)");
569
module_param_named(reset_delay, cfg_data[CFG_RESET_DELAY].value, int, 0);
570
MODULE_PARM_DESC(reset_delay, "Reset delay in seconds. Default 1 (0-180)");
574
* set_safe_settings - if the use_safe_settings option is set then
575
* set all values to the safe and slow values.
577
static void __devinit set_safe_settings(void)
579
if (use_safe_settings)
583
dprintkl(KERN_INFO, "Using safe settings.\n");
584
for (i = 0; i < CFG_NUM; i++)
586
cfg_data[i].value = cfg_data[i].safe;
593
* fix_settings - reset any boot parameters which are out of range
594
* back to the default values.
596
static void __devinit fix_settings(void)
601
"setup: AdapterId=%08x MaxSpeed=%08x DevMode=%08x "
602
"AdapterMode=%08x Tags=%08x ResetDelay=%08x\n",
603
cfg_data[CFG_ADAPTER_ID].value,
604
cfg_data[CFG_MAX_SPEED].value,
605
cfg_data[CFG_DEV_MODE].value,
606
cfg_data[CFG_ADAPTER_MODE].value,
607
cfg_data[CFG_TAGS].value,
608
cfg_data[CFG_RESET_DELAY].value);
609
for (i = 0; i < CFG_NUM; i++)
611
if (cfg_data[i].value < cfg_data[i].min
612
|| cfg_data[i].value > cfg_data[i].max)
613
cfg_data[i].value = cfg_data[i].def;
620
* Mapping from the eeprom delay index value (index into this array)
621
* to the number of actual seconds that the delay should be for.
623
static char __devinitdata eeprom_index_to_delay_map[] =
624
{ 1, 3, 5, 10, 16, 30, 60, 120 };
628
* eeprom_index_to_delay - Take the eeprom delay setting and convert it
629
* into a number of seconds.
631
* @eeprom: The eeprom structure in which we find the delay index to map.
633
static void __devinit eeprom_index_to_delay(struct NvRamType *eeprom)
635
eeprom->delay_time = eeprom_index_to_delay_map[eeprom->delay_time];
640
* delay_to_eeprom_index - Take a delay in seconds and return the
641
* closest eeprom index which will delay for at least that amount of
644
* @delay: The delay, in seconds, to find the eeprom index for.
646
static int __devinit delay_to_eeprom_index(int delay)
649
while (idx < 7 && eeprom_index_to_delay_map[idx] < delay)
656
* eeprom_override - Override the eeprom settings, in the provided
657
* eeprom structure, with values that have been set on the command
660
* @eeprom: The eeprom data to override with command line options.
662
static void __devinit eeprom_override(struct NvRamType *eeprom)
666
/* Adapter Settings */
667
if (cfg_data[CFG_ADAPTER_ID].value != CFG_PARAM_UNSET)
668
eeprom->scsi_id = (u8)cfg_data[CFG_ADAPTER_ID].value;
670
if (cfg_data[CFG_ADAPTER_MODE].value != CFG_PARAM_UNSET)
671
eeprom->channel_cfg = (u8)cfg_data[CFG_ADAPTER_MODE].value;
673
if (cfg_data[CFG_RESET_DELAY].value != CFG_PARAM_UNSET)
674
eeprom->delay_time = delay_to_eeprom_index(
675
cfg_data[CFG_RESET_DELAY].value);
677
if (cfg_data[CFG_TAGS].value != CFG_PARAM_UNSET)
678
eeprom->max_tag = (u8)cfg_data[CFG_TAGS].value;
680
/* Device Settings */
681
for (id = 0; id < DC395x_MAX_SCSI_ID; id++) {
682
if (cfg_data[CFG_DEV_MODE].value != CFG_PARAM_UNSET)
683
eeprom->target[id].cfg0 =
684
(u8)cfg_data[CFG_DEV_MODE].value;
686
if (cfg_data[CFG_MAX_SPEED].value != CFG_PARAM_UNSET)
687
eeprom->target[id].period =
688
(u8)cfg_data[CFG_MAX_SPEED].value;
694
/*---------------------------------------------------------------------------
695
---------------------------------------------------------------------------*/
697
static unsigned int list_size(struct list_head *head)
699
unsigned int count = 0;
700
struct list_head *pos;
701
list_for_each(pos, head)
707
static struct DeviceCtlBlk *dcb_get_next(struct list_head *head,
708
struct DeviceCtlBlk *pos)
711
struct DeviceCtlBlk* next = NULL;
712
struct DeviceCtlBlk* i;
714
if (list_empty(head))
717
/* find supplied dcb and then select the next one */
718
list_for_each_entry(i, head, list)
722
} else if (i == pos) {
725
/* if no next one take the head one (ie, wraparound) */
727
list_for_each_entry(i, head, list) {
736
static void free_tag(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
738
if (srb->tag_number < 255) {
739
dcb->tag_mask &= ~(1 << srb->tag_number); /* free tag mask */
740
srb->tag_number = 255;
745
/* Find cmd in SRB list */
746
static inline struct ScsiReqBlk *find_cmd(struct scsi_cmnd *cmd,
747
struct list_head *head)
749
struct ScsiReqBlk *i;
750
list_for_each_entry(i, head, list)
757
static struct ScsiReqBlk *srb_get_free(struct AdapterCtlBlk *acb)
759
struct list_head *head = &acb->srb_free_list;
760
struct ScsiReqBlk *srb = NULL;
762
if (!list_empty(head)) {
763
srb = list_entry(head->next, struct ScsiReqBlk, list);
764
list_del(head->next);
765
dprintkdbg(DBG_0, "srb_get_free: srb=%p\n", srb);
771
static void srb_free_insert(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
773
dprintkdbg(DBG_0, "srb_free_insert: srb=%p\n", srb);
774
list_add_tail(&srb->list, &acb->srb_free_list);
778
static void srb_waiting_insert(struct DeviceCtlBlk *dcb,
779
struct ScsiReqBlk *srb)
781
dprintkdbg(DBG_0, "srb_waiting_insert: (0x%p) <%02i-%i> srb=%p\n",
782
srb->cmd, dcb->target_id, dcb->target_lun, srb);
783
list_add(&srb->list, &dcb->srb_waiting_list);
787
static void srb_waiting_append(struct DeviceCtlBlk *dcb,
788
struct ScsiReqBlk *srb)
790
dprintkdbg(DBG_0, "srb_waiting_append: (0x%p) <%02i-%i> srb=%p\n",
791
srb->cmd, dcb->target_id, dcb->target_lun, srb);
792
list_add_tail(&srb->list, &dcb->srb_waiting_list);
796
static void srb_going_append(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
798
dprintkdbg(DBG_0, "srb_going_append: (0x%p) <%02i-%i> srb=%p\n",
799
srb->cmd, dcb->target_id, dcb->target_lun, srb);
800
list_add_tail(&srb->list, &dcb->srb_going_list);
804
static void srb_going_remove(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
806
struct ScsiReqBlk *i;
807
struct ScsiReqBlk *tmp;
808
dprintkdbg(DBG_0, "srb_going_remove: (0x%p) <%02i-%i> srb=%p\n",
809
srb->cmd, dcb->target_id, dcb->target_lun, srb);
811
list_for_each_entry_safe(i, tmp, &dcb->srb_going_list, list)
813
list_del(&srb->list);
819
static void srb_waiting_remove(struct DeviceCtlBlk *dcb,
820
struct ScsiReqBlk *srb)
822
struct ScsiReqBlk *i;
823
struct ScsiReqBlk *tmp;
824
dprintkdbg(DBG_0, "srb_waiting_remove: (0x%p) <%02i-%i> srb=%p\n",
825
srb->cmd, dcb->target_id, dcb->target_lun, srb);
827
list_for_each_entry_safe(i, tmp, &dcb->srb_waiting_list, list)
829
list_del(&srb->list);
835
static void srb_going_to_waiting_move(struct DeviceCtlBlk *dcb,
836
struct ScsiReqBlk *srb)
839
"srb_going_to_waiting_move: (0x%p) <%02i-%i> srb=%p\n",
840
srb->cmd, dcb->target_id, dcb->target_lun, srb);
841
list_move(&srb->list, &dcb->srb_waiting_list);
845
static void srb_waiting_to_going_move(struct DeviceCtlBlk *dcb,
846
struct ScsiReqBlk *srb)
849
"srb_waiting_to_going_move: (0x%p) <%02i-%i> srb=%p\n",
850
srb->cmd, dcb->target_id, dcb->target_lun, srb);
851
list_move(&srb->list, &dcb->srb_going_list);
855
/* Sets the timer to wake us up */
856
static void waiting_set_timer(struct AdapterCtlBlk *acb, unsigned long to)
858
if (timer_pending(&acb->waiting_timer))
860
init_timer(&acb->waiting_timer);
861
acb->waiting_timer.function = waiting_timeout;
862
acb->waiting_timer.data = (unsigned long) acb;
863
if (time_before(jiffies + to, acb->scsi_host->last_reset - HZ / 2))
864
acb->waiting_timer.expires =
865
acb->scsi_host->last_reset - HZ / 2 + 1;
867
acb->waiting_timer.expires = jiffies + to + 1;
868
add_timer(&acb->waiting_timer);
872
/* Send the next command from the waiting list to the bus */
873
static void waiting_process_next(struct AdapterCtlBlk *acb)
875
struct DeviceCtlBlk *start = NULL;
876
struct DeviceCtlBlk *pos;
877
struct DeviceCtlBlk *dcb;
878
struct ScsiReqBlk *srb;
879
struct list_head *dcb_list_head = &acb->dcb_list;
882
|| (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV)))
885
if (timer_pending(&acb->waiting_timer))
886
del_timer(&acb->waiting_timer);
888
if (list_empty(dcb_list_head))
892
* Find the starting dcb. Need to find it again in the list
893
* since the list may have changed since we set the ptr to it
895
list_for_each_entry(dcb, dcb_list_head, list)
896
if (dcb == acb->dcb_run_robin) {
901
/* This can happen! */
902
start = list_entry(dcb_list_head->next, typeof(*start), list);
903
acb->dcb_run_robin = start;
908
* Loop over the dcb, but we start somewhere (potentially) in
909
* the middle of the loop so we need to manully do this.
913
struct list_head *waiting_list_head = &pos->srb_waiting_list;
915
/* Make sure, the next another device gets scheduled ... */
916
acb->dcb_run_robin = dcb_get_next(dcb_list_head,
919
if (list_empty(waiting_list_head) ||
920
pos->max_command <= list_size(&pos->srb_going_list)) {
921
/* move to next dcb */
922
pos = dcb_get_next(dcb_list_head, pos);
924
srb = list_entry(waiting_list_head->next,
925
struct ScsiReqBlk, list);
927
/* Try to send to the bus */
928
if (!start_scsi(acb, pos, srb))
929
srb_waiting_to_going_move(pos, srb);
931
waiting_set_timer(acb, HZ/50);
934
} while (pos != start);
938
/* Wake up waiting queue */
939
static void waiting_timeout(unsigned long ptr)
942
struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)ptr;
944
"waiting_timeout: Queue woken up by timer. acb=%p\n", acb);
945
DC395x_LOCK_IO(acb->scsi_host, flags);
946
waiting_process_next(acb);
947
DC395x_UNLOCK_IO(acb->scsi_host, flags);
951
/* Get the DCB for a given ID/LUN combination */
952
static struct DeviceCtlBlk *find_dcb(struct AdapterCtlBlk *acb, u8 id, u8 lun)
954
return acb->children[id][lun];
958
/* Send SCSI Request Block (srb) to adapter (acb) */
959
static void send_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
961
struct DeviceCtlBlk *dcb = srb->dcb;
963
if (dcb->max_command <= list_size(&dcb->srb_going_list) ||
965
(acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV))) {
966
srb_waiting_append(dcb, srb);
967
waiting_process_next(acb);
971
if (!start_scsi(acb, dcb, srb))
972
srb_going_append(dcb, srb);
974
srb_waiting_insert(dcb, srb);
975
waiting_set_timer(acb, HZ / 50);
979
/* Prepare SRB for being sent to Device DCB w/ command *cmd */
980
static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb,
981
struct ScsiReqBlk *srb)
984
enum dma_data_direction dir = cmd->sc_data_direction;
985
dprintkdbg(DBG_0, "build_srb: (0x%p) <%02i-%i>\n",
986
cmd, dcb->target_id, dcb->target_lun);
991
srb->total_xfer_length = 0;
992
srb->sg_bus_addr = 0;
994
srb->adapter_status = 0;
995
srb->target_status = 0;
1000
srb->retry_count = 0;
1001
srb->tag_number = TAG_NONE;
1002
srb->scsi_phase = PH_BUS_FREE; /* initial phase */
1003
srb->end_message = 0;
1005
nseg = scsi_dma_map(cmd);
1008
if (dir == PCI_DMA_NONE || !nseg) {
1010
"build_srb: [0] len=%d buf=%p use_sg=%d !MAP=%08x\n",
1011
cmd->bufflen, scsi_sglist(cmd), scsi_sg_count(cmd),
1012
srb->segment_x[0].address);
1015
u32 reqlen = scsi_bufflen(cmd);
1016
struct scatterlist *sg;
1017
struct SGentry *sgp = srb->segment_x;
1019
srb->sg_count = nseg;
1022
"build_srb: [n] len=%d buf=%p use_sg=%d segs=%d\n",
1023
reqlen, scsi_sglist(cmd), scsi_sg_count(cmd),
1026
scsi_for_each_sg(cmd, sg, srb->sg_count, i) {
1027
u32 busaddr = (u32)sg_dma_address(sg);
1028
u32 seglen = (u32)sg->length;
1029
sgp[i].address = busaddr;
1030
sgp[i].length = seglen;
1031
srb->total_xfer_length += seglen;
1033
sgp += srb->sg_count - 1;
1036
* adjust last page if too big as it is allocated
1037
* on even page boundaries
1039
if (srb->total_xfer_length > reqlen) {
1040
sgp->length -= (srb->total_xfer_length - reqlen);
1041
srb->total_xfer_length = reqlen;
1044
/* Fixup for WIDE padding - make sure length is even */
1045
if (dcb->sync_period & WIDE_SYNC &&
1046
srb->total_xfer_length % 2) {
1047
srb->total_xfer_length++;
1051
srb->sg_bus_addr = pci_map_single(dcb->acb->dev,
1056
dprintkdbg(DBG_SG, "build_srb: [n] map sg %p->%08x(%05x)\n",
1057
srb->segment_x, srb->sg_bus_addr, SEGMENTX_LEN);
1060
srb->request_length = srb->total_xfer_length;
1065
* dc395x_queue_command - queue scsi command passed from the mid
1066
* layer, invoke 'done' on completion
1068
* @cmd: pointer to scsi command object
1069
* @done: function pointer to be invoked on completion
1071
* Returns 1 if the adapter (host) is busy, else returns 0. One
1072
* reason for an adapter to be busy is that the number
1073
* of outstanding queued commands is already equal to
1074
* struct Scsi_Host::can_queue .
1076
* Required: if struct Scsi_Host::can_queue is ever non-zero
1077
* then this function is required.
1079
* Locks: struct Scsi_Host::host_lock held on entry (with "irqsave")
1080
* and is expected to be held on return.
1083
static int dc395x_queue_command_lck(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
1085
struct DeviceCtlBlk *dcb;
1086
struct ScsiReqBlk *srb;
1087
struct AdapterCtlBlk *acb =
1088
(struct AdapterCtlBlk *)cmd->device->host->hostdata;
1089
dprintkdbg(DBG_0, "queue_command: (0x%p) <%02i-%i> cmnd=0x%02x\n",
1090
cmd, cmd->device->id, cmd->device->lun, cmd->cmnd[0]);
1092
/* Assume BAD_TARGET; will be cleared later */
1093
cmd->result = DID_BAD_TARGET << 16;
1095
/* ignore invalid targets */
1096
if (cmd->device->id >= acb->scsi_host->max_id ||
1097
cmd->device->lun >= acb->scsi_host->max_lun ||
1098
cmd->device->lun >31) {
1102
/* does the specified lun on the specified device exist */
1103
if (!(acb->dcb_map[cmd->device->id] & (1 << cmd->device->lun))) {
1104
dprintkl(KERN_INFO, "queue_command: Ignore target <%02i-%i>\n",
1105
cmd->device->id, cmd->device->lun);
1109
/* do we have a DCB for the device */
1110
dcb = find_dcb(acb, cmd->device->id, cmd->device->lun);
1112
/* should never happen */
1113
dprintkl(KERN_ERR, "queue_command: No such device <%02i-%i>",
1114
cmd->device->id, cmd->device->lun);
1118
/* set callback and clear result in the command */
1119
cmd->scsi_done = done;
1122
srb = srb_get_free(acb);
1126
* Return 1 since we are unable to queue this command at this
1129
dprintkdbg(DBG_0, "queue_command: No free srb's\n");
1133
build_srb(cmd, dcb, srb);
1135
if (!list_empty(&dcb->srb_waiting_list)) {
1136
/* append to waiting queue */
1137
srb_waiting_append(dcb, srb);
1138
waiting_process_next(acb);
1140
/* process immediately */
1143
dprintkdbg(DBG_1, "queue_command: (0x%p) done\n", cmd);
1148
* Complete the command immediatey, and then return 0 to
1149
* indicate that we have handled the command. This is usually
1150
* done when the commad is for things like non existent
1157
static DEF_SCSI_QCMD(dc395x_queue_command)
1160
* Return the disk geometry for the given SCSI device.
1162
static int dc395x_bios_param(struct scsi_device *sdev,
1163
struct block_device *bdev, sector_t capacity, int *info)
1165
#ifdef CONFIG_SCSI_DC395x_TRMS1040_TRADMAP
1166
int heads, sectors, cylinders;
1167
struct AdapterCtlBlk *acb;
1168
int size = capacity;
1170
dprintkdbg(DBG_0, "dc395x_bios_param..............\n");
1171
acb = (struct AdapterCtlBlk *)sdev->host->hostdata;
1174
cylinders = size / (heads * sectors);
1176
if ((acb->gmode2 & NAC_GREATER_1G) && (cylinders > 1024)) {
1179
cylinders = size / (heads * sectors);
1183
geom[2] = cylinders;
1186
return scsicam_bios_param(bdev, capacity, info);
1191
static void dump_register_info(struct AdapterCtlBlk *acb,
1192
struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
1195
struct pci_dev *dev = acb->dev;
1196
pci_read_config_word(dev, PCI_STATUS, &pstat);
1198
dcb = acb->active_dcb;
1200
srb = dcb->active_srb;
1203
dprintkl(KERN_INFO, "dump: srb=%p cmd=%p OOOPS!\n",
1206
dprintkl(KERN_INFO, "dump: srb=%p cmd=%p "
1207
"cmnd=0x%02x <%02i-%i>\n",
1209
srb->cmd->cmnd[0], srb->cmd->device->id,
1210
srb->cmd->device->lun);
1211
printk(" sglist=%p cnt=%i idx=%i len=%zu\n",
1212
srb->segment_x, srb->sg_count, srb->sg_index,
1213
srb->total_xfer_length);
1214
printk(" state=0x%04x status=0x%02x phase=0x%02x (%sconn.)\n",
1215
srb->state, srb->status, srb->scsi_phase,
1216
(acb->active_dcb) ? "" : "not");
1218
dprintkl(KERN_INFO, "dump: SCSI{status=0x%04x fifocnt=0x%02x "
1219
"signals=0x%02x irqstat=0x%02x sync=0x%02x target=0x%02x "
1220
"rselid=0x%02x ctr=0x%08x irqen=0x%02x config=0x%04x "
1221
"config2=0x%02x cmd=0x%02x selto=0x%02x}\n",
1222
DC395x_read16(acb, TRM_S1040_SCSI_STATUS),
1223
DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
1224
DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL),
1225
DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS),
1226
DC395x_read8(acb, TRM_S1040_SCSI_SYNC),
1227
DC395x_read8(acb, TRM_S1040_SCSI_TARGETID),
1228
DC395x_read8(acb, TRM_S1040_SCSI_IDMSG),
1229
DC395x_read32(acb, TRM_S1040_SCSI_COUNTER),
1230
DC395x_read8(acb, TRM_S1040_SCSI_INTEN),
1231
DC395x_read16(acb, TRM_S1040_SCSI_CONFIG0),
1232
DC395x_read8(acb, TRM_S1040_SCSI_CONFIG2),
1233
DC395x_read8(acb, TRM_S1040_SCSI_COMMAND),
1234
DC395x_read8(acb, TRM_S1040_SCSI_TIMEOUT));
1235
dprintkl(KERN_INFO, "dump: DMA{cmd=0x%04x fifocnt=0x%02x fstat=0x%02x "
1236
"irqstat=0x%02x irqen=0x%02x cfg=0x%04x tctr=0x%08x "
1237
"ctctr=0x%08x addr=0x%08x:0x%08x}\n",
1238
DC395x_read16(acb, TRM_S1040_DMA_COMMAND),
1239
DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
1240
DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
1241
DC395x_read8(acb, TRM_S1040_DMA_STATUS),
1242
DC395x_read8(acb, TRM_S1040_DMA_INTEN),
1243
DC395x_read16(acb, TRM_S1040_DMA_CONFIG),
1244
DC395x_read32(acb, TRM_S1040_DMA_XCNT),
1245
DC395x_read32(acb, TRM_S1040_DMA_CXCNT),
1246
DC395x_read32(acb, TRM_S1040_DMA_XHIGHADDR),
1247
DC395x_read32(acb, TRM_S1040_DMA_XLOWADDR));
1248
dprintkl(KERN_INFO, "dump: gen{gctrl=0x%02x gstat=0x%02x gtmr=0x%02x} "
1249
"pci{status=0x%04x}\n",
1250
DC395x_read8(acb, TRM_S1040_GEN_CONTROL),
1251
DC395x_read8(acb, TRM_S1040_GEN_STATUS),
1252
DC395x_read8(acb, TRM_S1040_GEN_TIMER),
1257
static inline void clear_fifo(struct AdapterCtlBlk *acb, char *txt)
1259
#if debug_enabled(DBG_FIFO)
1260
u8 lines = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
1261
u8 fifocnt = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
1262
if (!(fifocnt & 0x40))
1263
dprintkdbg(DBG_FIFO,
1264
"clear_fifo: (%i bytes) on phase %02x in %s\n",
1265
fifocnt & 0x3f, lines, txt);
1267
DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRFIFO);
1271
static void reset_dev_param(struct AdapterCtlBlk *acb)
1273
struct DeviceCtlBlk *dcb;
1274
struct NvRamType *eeprom = &acb->eeprom;
1275
dprintkdbg(DBG_0, "reset_dev_param: acb=%p\n", acb);
1277
list_for_each_entry(dcb, &acb->dcb_list, list) {
1280
dcb->sync_mode &= ~(SYNC_NEGO_DONE + WIDE_NEGO_DONE);
1281
dcb->sync_period = 0;
1282
dcb->sync_offset = 0;
1284
dcb->dev_mode = eeprom->target[dcb->target_id].cfg0;
1285
period_index = eeprom->target[dcb->target_id].period & 0x07;
1286
dcb->min_nego_period = clock_period[period_index];
1287
if (!(dcb->dev_mode & NTC_DO_WIDE_NEGO)
1288
|| !(acb->config & HCC_WIDE_CARD))
1289
dcb->sync_mode &= ~WIDE_NEGO_ENABLE;
1295
* perform a hard reset on the SCSI bus
1296
* @cmd - some command for this host (for fetching hooks)
1297
* Returns: SUCCESS (0x2002) on success, else FAILED (0x2003).
1299
static int __dc395x_eh_bus_reset(struct scsi_cmnd *cmd)
1301
struct AdapterCtlBlk *acb =
1302
(struct AdapterCtlBlk *)cmd->device->host->hostdata;
1304
"eh_bus_reset: (0%p) target=<%02i-%i> cmd=%p\n",
1305
cmd, cmd->device->id, cmd->device->lun, cmd);
1307
if (timer_pending(&acb->waiting_timer))
1308
del_timer(&acb->waiting_timer);
1313
DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00);
1314
DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00);
1315
DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
1316
DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
1318
reset_scsi_bus(acb);
1321
/* We may be in serious trouble. Wait some seconds */
1322
acb->scsi_host->last_reset =
1323
jiffies + 3 * HZ / 2 +
1324
HZ * acb->eeprom.delay_time;
1327
* re-enable interrupt
1329
/* Clear SCSI FIFO */
1330
DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
1331
clear_fifo(acb, "eh_bus_reset");
1332
/* Delete pending IRQ */
1333
DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
1334
set_basic_config(acb);
1336
reset_dev_param(acb);
1337
doing_srb_done(acb, DID_RESET, cmd, 0);
1338
acb->active_dcb = NULL;
1339
acb->acb_flag = 0; /* RESET_DETECT, RESET_DONE ,RESET_DEV */
1340
waiting_process_next(acb);
1345
static int dc395x_eh_bus_reset(struct scsi_cmnd *cmd)
1349
spin_lock_irq(cmd->device->host->host_lock);
1350
rc = __dc395x_eh_bus_reset(cmd);
1351
spin_unlock_irq(cmd->device->host->host_lock);
1357
* abort an errant SCSI command
1358
* @cmd - command to be aborted
1359
* Returns: SUCCESS (0x2002) on success, else FAILED (0x2003).
1361
static int dc395x_eh_abort(struct scsi_cmnd *cmd)
1364
* Look into our command queues: If it has not been sent already,
1365
* we remove it and return success. Otherwise fail.
1367
struct AdapterCtlBlk *acb =
1368
(struct AdapterCtlBlk *)cmd->device->host->hostdata;
1369
struct DeviceCtlBlk *dcb;
1370
struct ScsiReqBlk *srb;
1371
dprintkl(KERN_INFO, "eh_abort: (0x%p) target=<%02i-%i> cmd=%p\n",
1372
cmd, cmd->device->id, cmd->device->lun, cmd);
1374
dcb = find_dcb(acb, cmd->device->id, cmd->device->lun);
1376
dprintkl(KERN_DEBUG, "eh_abort: No such device\n");
1380
srb = find_cmd(cmd, &dcb->srb_waiting_list);
1382
srb_waiting_remove(dcb, srb);
1383
pci_unmap_srb_sense(acb, srb);
1384
pci_unmap_srb(acb, srb);
1386
srb_free_insert(acb, srb);
1387
dprintkl(KERN_DEBUG, "eh_abort: Command was waiting\n");
1388
cmd->result = DID_ABORT << 16;
1391
srb = find_cmd(cmd, &dcb->srb_going_list);
1393
dprintkl(KERN_DEBUG, "eh_abort: Command in progress\n");
1394
/* XXX: Should abort the command here */
1396
dprintkl(KERN_DEBUG, "eh_abort: Command not found\n");
1403
static void build_sdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
1404
struct ScsiReqBlk *srb)
1406
u8 *ptr = srb->msgout_buf + srb->msg_count;
1407
if (srb->msg_count > 1) {
1409
"build_sdtr: msgout_buf BUSY (%i: %02x %02x)\n",
1410
srb->msg_count, srb->msgout_buf[0],
1411
srb->msgout_buf[1]);
1414
if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO)) {
1415
dcb->sync_offset = 0;
1416
dcb->min_nego_period = 200 >> 2;
1417
} else if (dcb->sync_offset == 0)
1418
dcb->sync_offset = SYNC_NEGO_OFFSET;
1420
*ptr++ = MSG_EXTENDED; /* (01h) */
1421
*ptr++ = 3; /* length */
1422
*ptr++ = EXTENDED_SDTR; /* (01h) */
1423
*ptr++ = dcb->min_nego_period; /* Transfer period (in 4ns) */
1424
*ptr++ = dcb->sync_offset; /* Transfer period (max. REQ/ACK dist) */
1425
srb->msg_count += 5;
1426
srb->state |= SRB_DO_SYNC_NEGO;
1431
static void build_wdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
1432
struct ScsiReqBlk *srb)
1434
u8 wide = ((dcb->dev_mode & NTC_DO_WIDE_NEGO) &
1435
(acb->config & HCC_WIDE_CARD)) ? 1 : 0;
1436
u8 *ptr = srb->msgout_buf + srb->msg_count;
1437
if (srb->msg_count > 1) {
1439
"build_wdtr: msgout_buf BUSY (%i: %02x %02x)\n",
1440
srb->msg_count, srb->msgout_buf[0],
1441
srb->msgout_buf[1]);
1444
*ptr++ = MSG_EXTENDED; /* (01h) */
1445
*ptr++ = 2; /* length */
1446
*ptr++ = EXTENDED_WDTR; /* (03h) */
1448
srb->msg_count += 4;
1449
srb->state |= SRB_DO_WIDE_NEGO;
1454
/* Timer to work around chip flaw: When selecting and the bus is
1455
* busy, we sometimes miss a Selection timeout IRQ */
1456
void selection_timeout_missed(unsigned long ptr);
1457
/* Sets the timer to wake us up */
1458
static void selto_timer(struct AdapterCtlBlk *acb)
1460
if (timer_pending(&acb->selto_timer))
1462
acb->selto_timer.function = selection_timeout_missed;
1463
acb->selto_timer.data = (unsigned long) acb;
1465
(jiffies + HZ, acb->scsi_host->last_reset + HZ / 2))
1466
acb->selto_timer.expires =
1467
acb->scsi_host->last_reset + HZ / 2 + 1;
1469
acb->selto_timer.expires = jiffies + HZ + 1;
1470
add_timer(&acb->selto_timer);
1474
void selection_timeout_missed(unsigned long ptr)
1476
unsigned long flags;
1477
struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)ptr;
1478
struct ScsiReqBlk *srb;
1479
dprintkl(KERN_DEBUG, "Chip forgot to produce SelTO IRQ!\n");
1480
if (!acb->active_dcb || !acb->active_dcb->active_srb) {
1481
dprintkl(KERN_DEBUG, "... but no cmd pending? Oops!\n");
1484
DC395x_LOCK_IO(acb->scsi_host, flags);
1485
srb = acb->active_dcb->active_srb;
1487
DC395x_UNLOCK_IO(acb->scsi_host, flags);
1492
static u8 start_scsi(struct AdapterCtlBlk* acb, struct DeviceCtlBlk* dcb,
1493
struct ScsiReqBlk* srb)
1495
u16 s_stat2, return_code;
1496
u8 s_stat, scsicommand, i, identify_message;
1498
dprintkdbg(DBG_0, "start_scsi: (0x%p) <%02i-%i> srb=%p\n",
1499
dcb->target_id, dcb->target_lun, srb);
1501
srb->tag_number = TAG_NONE; /* acb->tag_max_num: had error read in eeprom */
1503
s_stat = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
1505
s_stat2 = DC395x_read16(acb, TRM_S1040_SCSI_STATUS);
1507
if (s_stat & 0x20 /* s_stat2 & 0x02000 */ ) {
1508
dprintkdbg(DBG_KG, "start_scsi: (0x%p) BUSY %02x %04x\n",
1513
* We could, BUT: Sometimes the TRM_S1040 misses to produce a Selection
1514
* Timeout, a Disconnect or a Reselection IRQ, so we would be screwed!
1515
* (This is likely to be a bug in the hardware. Obviously, most people
1516
* only have one initiator per SCSI bus.)
1517
* Instead let this fail and have the timer make sure the command is
1518
* tried again after a short time
1520
/*selto_timer (acb); */
1524
if (acb->active_dcb) {
1525
dprintkl(KERN_DEBUG, "start_scsi: (0x%p) Attempt to start a"
1526
"command while another command (0x%p) is active.",
1528
acb->active_dcb->active_srb ?
1529
acb->active_dcb->active_srb->cmd : 0);
1532
if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) {
1533
dprintkdbg(DBG_KG, "start_scsi: (0x%p) Failed (busy)\n", srb->cmd);
1536
/* Allow starting of SCSI commands half a second before we allow the mid-level
1537
* to queue them again after a reset */
1538
if (time_before(jiffies, acb->scsi_host->last_reset - HZ / 2)) {
1539
dprintkdbg(DBG_KG, "start_scsi: Refuse cmds (reset wait)\n");
1544
clear_fifo(acb, "start_scsi");
1545
DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id);
1546
DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id);
1547
DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period);
1548
DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset);
1549
srb->scsi_phase = PH_BUS_FREE; /* initial phase */
1551
identify_message = dcb->identify_msg;
1552
/*DC395x_TRM_write8(TRM_S1040_SCSI_IDMSG, identify_message); */
1553
/* Don't allow disconnection for AUTO_REQSENSE: Cont.All.Cond.! */
1554
if (srb->flag & AUTO_REQSENSE)
1555
identify_message &= 0xBF;
1557
if (((srb->cmd->cmnd[0] == INQUIRY)
1558
|| (srb->cmd->cmnd[0] == REQUEST_SENSE)
1559
|| (srb->flag & AUTO_REQSENSE))
1560
&& (((dcb->sync_mode & WIDE_NEGO_ENABLE)
1561
&& !(dcb->sync_mode & WIDE_NEGO_DONE))
1562
|| ((dcb->sync_mode & SYNC_NEGO_ENABLE)
1563
&& !(dcb->sync_mode & SYNC_NEGO_DONE)))
1564
&& (dcb->target_lun == 0)) {
1565
srb->msgout_buf[0] = identify_message;
1567
scsicommand = SCMD_SEL_ATNSTOP;
1568
srb->state = SRB_MSGOUT;
1570
if (dcb->sync_mode & WIDE_NEGO_ENABLE
1571
&& dcb->inquiry7 & SCSI_INQ_WBUS16) {
1572
build_wdtr(acb, dcb, srb);
1576
if (dcb->sync_mode & SYNC_NEGO_ENABLE
1577
&& dcb->inquiry7 & SCSI_INQ_SYNC) {
1578
build_sdtr(acb, dcb, srb);
1581
if (dcb->sync_mode & WIDE_NEGO_ENABLE
1582
&& dcb->inquiry7 & SCSI_INQ_WBUS16) {
1583
build_wdtr(acb, dcb, srb);
1588
/* Send identify message */
1589
DC395x_write8(acb, TRM_S1040_SCSI_FIFO, identify_message);
1591
scsicommand = SCMD_SEL_ATN;
1592
srb->state = SRB_START_;
1593
#ifndef DC395x_NO_TAGQ
1594
if ((dcb->sync_mode & EN_TAG_QUEUEING)
1595
&& (identify_message & 0xC0)) {
1596
/* Send Tag message */
1599
while (tag_mask & dcb->tag_mask
1600
&& tag_number < dcb->max_command) {
1601
tag_mask = tag_mask << 1;
1604
if (tag_number >= dcb->max_command) {
1605
dprintkl(KERN_WARNING, "start_scsi: (0x%p) "
1606
"Out of tags target=<%02i-%i>)\n",
1607
srb->cmd, srb->cmd->device->id,
1608
srb->cmd->device->lun);
1609
srb->state = SRB_READY;
1610
DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
1615
DC395x_write8(acb, TRM_S1040_SCSI_FIFO, MSG_SIMPLE_QTAG);
1616
DC395x_write8(acb, TRM_S1040_SCSI_FIFO, tag_number);
1617
dcb->tag_mask |= tag_mask;
1618
srb->tag_number = tag_number;
1619
scsicommand = SCMD_SEL_ATN3;
1620
srb->state = SRB_START_;
1624
/* Send CDB ..command block ......... */
1625
dprintkdbg(DBG_KG, "start_scsi: (0x%p) <%02i-%i> cmnd=0x%02x tag=%i\n",
1626
srb->cmd, srb->cmd->device->id, srb->cmd->device->lun,
1627
srb->cmd->cmnd[0], srb->tag_number);
1628
if (srb->flag & AUTO_REQSENSE) {
1629
DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE);
1630
DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5));
1631
DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1632
DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1633
DC395x_write8(acb, TRM_S1040_SCSI_FIFO, SCSI_SENSE_BUFFERSIZE);
1634
DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1636
ptr = (u8 *)srb->cmd->cmnd;
1637
for (i = 0; i < srb->cmd->cmd_len; i++)
1638
DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++);
1641
DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
1642
DO_HWRESELECT | DO_DATALATCH);
1643
if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) {
1645
* If start_scsi return 1:
1646
* we caught an interrupt (must be reset or reselection ... )
1647
* : Let's process it first!
1649
dprintkdbg(DBG_0, "start_scsi: (0x%p) <%02i-%i> Failed - busy\n",
1650
srb->cmd, dcb->target_id, dcb->target_lun);
1651
srb->state = SRB_READY;
1655
/* This IRQ should NOT get lost, as we did not acknowledge it */
1658
* If start_scsi returns 0:
1659
* we know that the SCSI processor is free
1661
srb->scsi_phase = PH_BUS_FREE; /* initial phase */
1662
dcb->active_srb = srb;
1663
acb->active_dcb = dcb;
1665
/* it's important for atn stop */
1666
DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
1667
DO_DATALATCH | DO_HWRESELECT);
1669
DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, scsicommand);
1675
#define DC395x_ENABLE_MSGOUT \
1676
DC395x_write16 (acb, TRM_S1040_SCSI_CONTROL, DO_SETATN); \
1677
srb->state |= SRB_MSGOUT
1681
static inline void enable_msgout_abort(struct AdapterCtlBlk *acb,
1682
struct ScsiReqBlk *srb)
1684
srb->msgout_buf[0] = ABORT;
1686
DC395x_ENABLE_MSGOUT;
1687
srb->state &= ~SRB_MSGIN;
1688
srb->state |= SRB_MSGOUT;
1693
* dc395x_handle_interrupt - Handle an interrupt that has been confirmed to
1694
* have been triggered for this card.
1696
* @acb: a pointer to the adpter control block
1697
* @scsi_status: the status return when we checked the card
1699
static void dc395x_handle_interrupt(struct AdapterCtlBlk *acb,
1702
struct DeviceCtlBlk *dcb;
1703
struct ScsiReqBlk *srb;
1706
unsigned long flags;
1707
void (*dc395x_statev)(struct AdapterCtlBlk *, struct ScsiReqBlk *,
1710
DC395x_LOCK_IO(acb->scsi_host, flags);
1712
/* This acknowledges the IRQ */
1713
scsi_intstatus = DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
1714
if ((scsi_status & 0x2007) == 0x2002)
1715
dprintkl(KERN_DEBUG,
1716
"COP after COP completed? %04x\n", scsi_status);
1717
if (debug_enabled(DBG_KG)) {
1718
if (scsi_intstatus & INT_SELTIMEOUT)
1719
dprintkdbg(DBG_KG, "handle_interrupt: Selection timeout\n");
1721
/*dprintkl(KERN_DEBUG, "handle_interrupt: intstatus = 0x%02x ", scsi_intstatus); */
1723
if (timer_pending(&acb->selto_timer))
1724
del_timer(&acb->selto_timer);
1726
if (scsi_intstatus & (INT_SELTIMEOUT | INT_DISCONNECT)) {
1727
disconnect(acb); /* bus free interrupt */
1730
if (scsi_intstatus & INT_RESELECTED) {
1734
if (scsi_intstatus & INT_SELECT) {
1735
dprintkl(KERN_INFO, "Host does not support target mode!\n");
1738
if (scsi_intstatus & INT_SCSIRESET) {
1739
scsi_reset_detect(acb);
1742
if (scsi_intstatus & (INT_BUSSERVICE | INT_CMDDONE)) {
1743
dcb = acb->active_dcb;
1745
dprintkl(KERN_DEBUG,
1746
"Oops: BusService (%04x %02x) w/o ActiveDCB!\n",
1747
scsi_status, scsi_intstatus);
1750
srb = dcb->active_srb;
1751
if (dcb->flag & ABORT_DEV_) {
1752
dprintkdbg(DBG_0, "MsgOut Abort Device.....\n");
1753
enable_msgout_abort(acb, srb);
1756
/* software sequential machine */
1757
phase = (u16)srb->scsi_phase;
1761
* call dc395x_scsi_phase0[]... "phase entry"
1762
* handle every phase before start transfer
1764
/* data_out_phase0, phase:0 */
1765
/* data_in_phase0, phase:1 */
1766
/* command_phase0, phase:2 */
1767
/* status_phase0, phase:3 */
1768
/* nop0, phase:4 PH_BUS_FREE .. initial phase */
1769
/* nop0, phase:5 PH_BUS_FREE .. initial phase */
1770
/* msgout_phase0, phase:6 */
1771
/* msgin_phase0, phase:7 */
1772
dc395x_statev = dc395x_scsi_phase0[phase];
1773
dc395x_statev(acb, srb, &scsi_status);
1776
* if there were any exception occurred scsi_status
1777
* will be modify to bus free phase new scsi_status
1778
* transfer out from ... previous dc395x_statev
1780
srb->scsi_phase = scsi_status & PHASEMASK;
1781
phase = (u16)scsi_status & PHASEMASK;
1784
* call dc395x_scsi_phase1[]... "phase entry" handle
1785
* every phase to do transfer
1787
/* data_out_phase1, phase:0 */
1788
/* data_in_phase1, phase:1 */
1789
/* command_phase1, phase:2 */
1790
/* status_phase1, phase:3 */
1791
/* nop1, phase:4 PH_BUS_FREE .. initial phase */
1792
/* nop1, phase:5 PH_BUS_FREE .. initial phase */
1793
/* msgout_phase1, phase:6 */
1794
/* msgin_phase1, phase:7 */
1795
dc395x_statev = dc395x_scsi_phase1[phase];
1796
dc395x_statev(acb, srb, &scsi_status);
1799
DC395x_UNLOCK_IO(acb->scsi_host, flags);
1803
static irqreturn_t dc395x_interrupt(int irq, void *dev_id)
1805
struct AdapterCtlBlk *acb = dev_id;
1808
irqreturn_t handled = IRQ_NONE;
1811
* Check for pending interrupt
1813
scsi_status = DC395x_read16(acb, TRM_S1040_SCSI_STATUS);
1814
dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS);
1815
if (scsi_status & SCSIINTERRUPT) {
1816
/* interrupt pending - let's process it! */
1817
dc395x_handle_interrupt(acb, scsi_status);
1818
handled = IRQ_HANDLED;
1820
else if (dma_status & 0x20) {
1821
/* Error from the DMA engine */
1822
dprintkl(KERN_INFO, "Interrupt from DMA engine: 0x%02x!\n", dma_status);
1824
dprintkl(KERN_INFO, "This means DMA error! Try to handle ...\n");
1825
if (acb->active_dcb) {
1826
acb->active_dcb-> flag |= ABORT_DEV_;
1827
if (acb->active_dcb->active_srb)
1828
enable_msgout_abort(acb, acb->active_dcb->active_srb);
1830
DC395x_write8(acb, TRM_S1040_DMA_CONTROL, ABORTXFER | CLRXFIFO);
1832
dprintkl(KERN_INFO, "Ignoring DMA error (probably a bad thing) ...\n");
1835
handled = IRQ_HANDLED;
1842
static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1845
dprintkdbg(DBG_0, "msgout_phase0: (0x%p)\n", srb->cmd);
1846
if (srb->state & (SRB_UNEXPECT_RESEL + SRB_ABORT_SENT))
1847
*pscsi_status = PH_BUS_FREE; /*.. initial phase */
1849
DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
1850
srb->state &= ~SRB_MSGOUT;
1854
static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1859
dprintkdbg(DBG_0, "msgout_phase1: (0x%p)\n", srb->cmd);
1861
clear_fifo(acb, "msgout_phase1");
1862
if (!(srb->state & SRB_MSGOUT)) {
1863
srb->state |= SRB_MSGOUT;
1864
dprintkl(KERN_DEBUG,
1865
"msgout_phase1: (0x%p) Phase unexpected\n",
1866
srb->cmd); /* So what ? */
1868
if (!srb->msg_count) {
1869
dprintkdbg(DBG_0, "msgout_phase1: (0x%p) NOP msg\n",
1871
DC395x_write8(acb, TRM_S1040_SCSI_FIFO, MSG_NOP);
1872
DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
1873
DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
1876
ptr = (u8 *)srb->msgout_buf;
1877
for (i = 0; i < srb->msg_count; i++)
1878
DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++);
1880
if (srb->msgout_buf[0] == MSG_ABORT)
1881
srb->state = SRB_ABORT_SENT;
1883
DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
1887
static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1890
dprintkdbg(DBG_0, "command_phase0: (0x%p)\n", srb->cmd);
1891
DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
1895
static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1898
struct DeviceCtlBlk *dcb;
1901
dprintkdbg(DBG_0, "command_phase1: (0x%p)\n", srb->cmd);
1903
clear_fifo(acb, "command_phase1");
1904
DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRATN);
1905
if (!(srb->flag & AUTO_REQSENSE)) {
1906
ptr = (u8 *)srb->cmd->cmnd;
1907
for (i = 0; i < srb->cmd->cmd_len; i++) {
1908
DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr);
1912
DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE);
1913
dcb = acb->active_dcb;
1915
DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5));
1916
DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1917
DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1918
DC395x_write8(acb, TRM_S1040_SCSI_FIFO, SCSI_SENSE_BUFFERSIZE);
1919
DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1921
srb->state |= SRB_COMMAND;
1922
/* it's important for atn stop */
1923
DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
1925
DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
1930
* Verify that the remaining space in the hw sg lists is the same as
1931
* the count of remaining bytes in srb->total_xfer_length
1933
static void sg_verify_length(struct ScsiReqBlk *srb)
1935
if (debug_enabled(DBG_SG)) {
1937
unsigned idx = srb->sg_index;
1938
struct SGentry *psge = srb->segment_x + idx;
1939
for (; idx < srb->sg_count; psge++, idx++)
1940
len += psge->length;
1941
if (len != srb->total_xfer_length)
1943
"Inconsistent SRB S/G lengths (Tot=%i, Count=%i) !!\n",
1944
srb->total_xfer_length, len);
1950
* Compute the next Scatter Gather list index and adjust its length
1951
* and address if necessary
1953
static void sg_update_list(struct ScsiReqBlk *srb, u32 left)
1956
u32 xferred = srb->total_xfer_length - left; /* bytes transferred */
1957
struct SGentry *psge = srb->segment_x + srb->sg_index;
1960
"sg_update_list: Transferred %i of %i bytes, %i remain\n",
1961
xferred, srb->total_xfer_length, left);
1963
/* nothing to update since we did not transfer any data */
1967
sg_verify_length(srb);
1968
srb->total_xfer_length = left; /* update remaining count */
1969
for (idx = srb->sg_index; idx < srb->sg_count; idx++) {
1970
if (xferred >= psge->length) {
1971
/* Complete SG entries done */
1972
xferred -= psge->length;
1974
/* Partial SG entry done */
1975
psge->length -= xferred;
1976
psge->address += xferred;
1977
srb->sg_index = idx;
1978
pci_dma_sync_single_for_device(srb->dcb->
1987
sg_verify_length(srb);
1992
* We have transferred a single byte (PIO mode?) and need to update
1993
* the count of bytes remaining (total_xfer_length) and update the sg
1994
* entry to either point to next byte in the current sg entry, or of
1995
* already at the end to point to the start of the next sg entry
1997
static void sg_subtract_one(struct ScsiReqBlk *srb)
1999
sg_update_list(srb, srb->total_xfer_length - 1);
2004
* cleanup_after_transfer
2006
* Makes sure, DMA and SCSI engine are empty, after the transfer has finished
2007
* KG: Currently called from StatusPhase1 ()
2008
* Should probably also be called from other places
2009
* Best might be to call it in DataXXPhase0, if new phase will differ
2011
static void cleanup_after_transfer(struct AdapterCtlBlk *acb,
2012
struct ScsiReqBlk *srb)
2014
/*DC395x_write8 (TRM_S1040_DMA_STATUS, FORCEDMACOMP); */
2015
if (DC395x_read16(acb, TRM_S1040_DMA_COMMAND) & 0x0001) { /* read */
2016
if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40))
2017
clear_fifo(acb, "cleanup/in");
2018
if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80))
2019
DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
2020
} else { /* write */
2021
if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80))
2022
DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
2023
if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40))
2024
clear_fifo(acb, "cleanup/out");
2026
DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
2031
* Those no of bytes will be transferred w/ PIO through the SCSI FIFO
2032
* Seems to be needed for unknown reasons; could be a hardware bug :-(
2034
#define DC395x_LASTPIO 4
2037
static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2040
struct DeviceCtlBlk *dcb = srb->dcb;
2041
u16 scsi_status = *pscsi_status;
2042
u32 d_left_counter = 0;
2043
dprintkdbg(DBG_0, "data_out_phase0: (0x%p) <%02i-%i>\n",
2044
srb->cmd, srb->cmd->device->id, srb->cmd->device->lun);
2047
* KG: We need to drain the buffers before we draw any conclusions!
2048
* This means telling the DMA to push the rest into SCSI, telling
2049
* SCSI to push the rest to the bus.
2050
* However, the device might have been the one to stop us (phase
2051
* change), and the data in transit just needs to be accounted so
2052
* it can be retransmitted.)
2055
* KG: Stop DMA engine pushing more data into the SCSI FIFO
2056
* If we need more data, the DMA SG list will be freshly set up, anyway
2058
dprintkdbg(DBG_PIO, "data_out_phase0: "
2059
"DMA{fifocnt=0x%02x fifostat=0x%02x} "
2060
"SCSI{fifocnt=0x%02x cnt=0x%06x status=0x%04x} total=0x%06x\n",
2061
DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
2062
DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
2063
DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
2064
DC395x_read32(acb, TRM_S1040_SCSI_COUNTER), scsi_status,
2065
srb->total_xfer_length);
2066
DC395x_write8(acb, TRM_S1040_DMA_CONTROL, STOPDMAXFER | CLRXFIFO);
2068
if (!(srb->state & SRB_XFERPAD)) {
2069
if (scsi_status & PARITYERROR)
2070
srb->status |= PARITY_ERROR;
2073
* KG: Right, we can't just rely on the SCSI_COUNTER, because this
2074
* is the no of bytes it got from the DMA engine not the no it
2075
* transferred successfully to the device. (And the difference could
2076
* be as much as the FIFO size, I guess ...)
2078
if (!(scsi_status & SCSIXFERDONE)) {
2080
* when data transfer from DMA FIFO to SCSI FIFO
2081
* if there was some data left in SCSI FIFO
2084
(u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) &
2086
if (dcb->sync_period & WIDE_SYNC)
2087
d_left_counter <<= 1;
2089
dprintkdbg(DBG_KG, "data_out_phase0: FIFO contains %i %s\n"
2090
"SCSI{fifocnt=0x%02x cnt=0x%08x} "
2091
"DMA{fifocnt=0x%04x cnt=0x%02x ctr=0x%08x}\n",
2092
DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
2093
(dcb->sync_period & WIDE_SYNC) ? "words" : "bytes",
2094
DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
2095
DC395x_read32(acb, TRM_S1040_SCSI_COUNTER),
2096
DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
2097
DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
2098
DC395x_read32(acb, TRM_S1040_DMA_CXCNT));
2101
* calculate all the residue data that not yet tranfered
2102
* SCSI transfer counter + left in SCSI FIFO data
2104
* .....TRM_S1040_SCSI_COUNTER (24bits)
2105
* The counter always decrement by one for every SCSI byte transfer.
2106
* .....TRM_S1040_SCSI_FIFOCNT ( 5bits)
2107
* The counter is SCSI FIFO offset counter (in units of bytes or! words)
2109
if (srb->total_xfer_length > DC395x_LASTPIO)
2111
DC395x_read32(acb, TRM_S1040_SCSI_COUNTER);
2113
/* Is this a good idea? */
2114
/*clear_fifo(acb, "DOP1"); */
2115
/* KG: What is this supposed to be useful for? WIDE padding stuff? */
2116
if (d_left_counter == 1 && dcb->sync_period & WIDE_SYNC
2117
&& scsi_bufflen(srb->cmd) % 2) {
2120
"data_out_phase0: Discard 1 byte (0x%02x)\n",
2124
* KG: Oops again. Same thinko as above: The SCSI might have been
2125
* faster than the DMA engine, so that it ran out of data.
2126
* In that case, we have to do just nothing!
2127
* But: Why the interrupt: No phase change. No XFERCNT_2_ZERO. Or?
2130
* KG: This is nonsense: We have been WRITING data to the bus
2131
* If the SCSI engine has no bytes left, how should the DMA engine?
2133
if (d_left_counter == 0) {
2134
srb->total_xfer_length = 0;
2137
* if transfer not yet complete
2138
* there were some data residue in SCSI FIFO or
2139
* SCSI transfer counter not empty
2142
srb->total_xfer_length - d_left_counter;
2144
(dcb->sync_period & WIDE_SYNC) ? 2 : 1;
2145
sg_update_list(srb, d_left_counter);
2146
/* KG: Most ugly hack! Apparently, this works around a chip bug */
2147
if ((srb->segment_x[srb->sg_index].length ==
2148
diff && scsi_sg_count(srb->cmd))
2149
|| ((oldxferred & ~PAGE_MASK) ==
2152
dprintkl(KERN_INFO, "data_out_phase0: "
2153
"Work around chip bug (%i)?\n", diff);
2155
srb->total_xfer_length - diff;
2156
sg_update_list(srb, d_left_counter);
2157
/*srb->total_xfer_length -= diff; */
2158
/*srb->virt_addr += diff; */
2159
/*if (srb->cmd->use_sg) */
2160
/* srb->sg_index++; */
2164
if ((*pscsi_status & PHASEMASK) != PH_DATA_OUT) {
2165
cleanup_after_transfer(acb, srb);
2170
static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2173
dprintkdbg(DBG_0, "data_out_phase1: (0x%p) <%02i-%i>\n",
2174
srb->cmd, srb->cmd->device->id, srb->cmd->device->lun);
2175
clear_fifo(acb, "data_out_phase1");
2176
/* do prepare before transfer when data out phase */
2177
data_io_transfer(acb, srb, XFERDATAOUT);
2180
static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2183
u16 scsi_status = *pscsi_status;
2185
dprintkdbg(DBG_0, "data_in_phase0: (0x%p) <%02i-%i>\n",
2186
srb->cmd, srb->cmd->device->id, srb->cmd->device->lun);
2189
* KG: DataIn is much more tricky than DataOut. When the device is finished
2190
* and switches to another phase, the SCSI engine should be finished too.
2191
* But: There might still be bytes left in its FIFO to be fetched by the DMA
2192
* engine and transferred to memory.
2193
* We should wait for the FIFOs to be emptied by that (is there any way to
2194
* enforce this?) and then stop the DMA engine, because it might think, that
2195
* there are more bytes to follow. Yes, the device might disconnect prior to
2196
* having all bytes transferred!
2197
* Also we should make sure that all data from the DMA engine buffer's really
2198
* made its way to the system memory! Some documentation on this would not
2199
* seem to be a bad idea, actually.
2201
if (!(srb->state & SRB_XFERPAD)) {
2203
unsigned int sc, fc;
2205
if (scsi_status & PARITYERROR) {
2206
dprintkl(KERN_INFO, "data_in_phase0: (0x%p) "
2207
"Parity Error\n", srb->cmd);
2208
srb->status |= PARITY_ERROR;
2211
* KG: We should wait for the DMA FIFO to be empty ...
2212
* but: it would be better to wait first for the SCSI FIFO and then the
2213
* the DMA FIFO to become empty? How do we know, that the device not already
2214
* sent data to the FIFO in a MsgIn phase, eg.?
2216
if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80)) {
2219
dprintkl(KERN_DEBUG,
2220
"DIP0: Wait for DMA FIFO to flush ...\n");
2221
/*DC395x_write8 (TRM_S1040_DMA_CONTROL, STOPDMAXFER); */
2222
/*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 7); */
2223
/*DC395x_write8 (TRM_S1040_SCSI_COMMAND, SCMD_DMA_IN); */
2225
(DC395x_read16(acb, TRM_S1040_DMA_FIFOSTAT) &
2227
if (ctr < 6000000 - 1)
2229
"DIP0: Had to wait for DMA ...\n");
2232
"Deadlock in DIP0 waiting for DMA FIFO empty!!\n");
2233
/*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 0); */
2235
dprintkdbg(DBG_KG, "data_in_phase0: "
2236
"DMA{fifocnt=0x%02x fifostat=0x%02x}\n",
2237
DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
2238
DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT));
2240
/* Now: Check remainig data: The SCSI counters should tell us ... */
2241
sc = DC395x_read32(acb, TRM_S1040_SCSI_COUNTER);
2242
fc = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
2243
d_left_counter = sc + ((fc & 0x1f)
2244
<< ((srb->dcb->sync_period & WIDE_SYNC) ? 1 :
2246
dprintkdbg(DBG_KG, "data_in_phase0: "
2247
"SCSI{fifocnt=0x%02x%s ctr=0x%08x} "
2248
"DMA{fifocnt=0x%02x fifostat=0x%02x ctr=0x%08x} "
2249
"Remain{totxfer=%i scsi_fifo+ctr=%i}\n",
2251
(srb->dcb->sync_period & WIDE_SYNC) ? "words" : "bytes",
2254
DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
2255
DC395x_read32(acb, TRM_S1040_DMA_CXCNT),
2256
srb->total_xfer_length, d_left_counter);
2258
/* KG: Less than or equal to 4 bytes can not be transferred via DMA, it seems. */
2260
&& srb->total_xfer_length <= DC395x_LASTPIO) {
2261
size_t left_io = srb->total_xfer_length;
2263
/*u32 addr = (srb->segment_x[srb->sg_index].address); */
2264
/*sg_update_list (srb, d_left_counter); */
2265
dprintkdbg(DBG_PIO, "data_in_phase0: PIO (%i %s) "
2266
"for remaining %i bytes:",
2268
(srb->dcb->sync_period & WIDE_SYNC) ?
2270
srb->total_xfer_length);
2271
if (srb->dcb->sync_period & WIDE_SYNC)
2272
DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2275
unsigned char *virt, *base = NULL;
2276
unsigned long flags = 0;
2277
size_t len = left_io;
2278
size_t offset = srb->request_length - left_io;
2280
local_irq_save(flags);
2281
/* Assumption: it's inside one page as it's at most 4 bytes and
2282
I just assume it's on a 4-byte boundary */
2283
base = scsi_kmap_atomic_sg(scsi_sglist(srb->cmd),
2284
srb->sg_count, &offset, &len);
2285
virt = base + offset;
2291
byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2294
if (debug_enabled(DBG_PIO))
2295
printk(" %02x", byte);
2298
sg_subtract_one(srb);
2302
fc = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
2310
WARN_ON((fc != 0x40) == !d_left_counter);
2312
if (fc == 0x40 && (srb->dcb->sync_period & WIDE_SYNC)) {
2313
/* Read the last byte ... */
2314
if (srb->total_xfer_length > 0) {
2315
u8 byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2318
srb->total_xfer_length--;
2319
if (debug_enabled(DBG_PIO))
2320
printk(" %02x", byte);
2323
DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2326
scsi_kunmap_atomic_sg(base);
2327
local_irq_restore(flags);
2329
/*printk(" %08x", *(u32*)(bus_to_virt (addr))); */
2330
/*srb->total_xfer_length = 0; */
2331
if (debug_enabled(DBG_PIO))
2334
#endif /* DC395x_LASTPIO */
2338
* KG: This was in DATAOUT. Does it also belong here?
2339
* Nobody seems to know what counter and fifo_cnt count exactly ...
2341
if (!(scsi_status & SCSIXFERDONE)) {
2343
* when data transfer from DMA FIFO to SCSI FIFO
2344
* if there was some data left in SCSI FIFO
2347
(u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) &
2349
if (srb->dcb->sync_period & WIDE_SYNC)
2350
d_left_counter <<= 1;
2352
* if WIDE scsi SCSI FIFOCNT unit is word !!!
2354
* KG: Seems to be correct ...
2358
/* KG: This should not be needed any more! */
2359
if (d_left_counter == 0
2360
|| (scsi_status & SCSIXFERCNT_2_ZERO)) {
2366
DC395x_read8(acb, TRM_S1040_DMA_STATUS);
2367
} while (!(TempDMAstatus & DMAXFERCOMP) && --ctr);
2370
"Deadlock in DataInPhase0 waiting for DMA!!\n");
2371
srb->total_xfer_length = 0;
2373
srb->total_xfer_length = d_left_counter;
2374
} else { /* phase changed */
2377
* when a transfer not yet complete
2378
* but be disconnected by target
2379
* if transfer not yet complete
2380
* there were some data residue in SCSI FIFO or
2381
* SCSI transfer counter not empty
2383
sg_update_list(srb, d_left_counter);
2386
/* KG: The target may decide to disconnect: Empty FIFO before! */
2387
if ((*pscsi_status & PHASEMASK) != PH_DATA_IN) {
2388
cleanup_after_transfer(acb, srb);
2393
static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2396
dprintkdbg(DBG_0, "data_in_phase1: (0x%p) <%02i-%i>\n",
2397
srb->cmd, srb->cmd->device->id, srb->cmd->device->lun);
2398
data_io_transfer(acb, srb, XFERDATAIN);
2402
static void data_io_transfer(struct AdapterCtlBlk *acb,
2403
struct ScsiReqBlk *srb, u16 io_dir)
2405
struct DeviceCtlBlk *dcb = srb->dcb;
2408
"data_io_transfer: (0x%p) <%02i-%i> %c len=%i, sg=(%i/%i)\n",
2409
srb->cmd, srb->cmd->device->id, srb->cmd->device->lun,
2410
((io_dir & DMACMD_DIR) ? 'r' : 'w'),
2411
srb->total_xfer_length, srb->sg_index, srb->sg_count);
2412
if (srb == acb->tmp_srb)
2413
dprintkl(KERN_ERR, "data_io_transfer: Using tmp_srb!\n");
2414
if (srb->sg_index >= srb->sg_count) {
2415
/* can't happen? out of bounds error */
2419
if (srb->total_xfer_length > DC395x_LASTPIO) {
2420
u8 dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS);
2422
* KG: What should we do: Use SCSI Cmd 0x90/0x92?
2423
* Maybe, even ABORTXFER would be appropriate
2425
if (dma_status & XFERPENDING) {
2426
dprintkl(KERN_DEBUG, "data_io_transfer: Xfer pending! "
2427
"Expect trouble!\n");
2428
dump_register_info(acb, dcb, srb);
2429
DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
2431
/* clear_fifo(acb, "IO"); */
2433
* load what physical address of Scatter/Gather list table
2434
* want to be transfer
2436
srb->state |= SRB_DATA_XFER;
2437
DC395x_write32(acb, TRM_S1040_DMA_XHIGHADDR, 0);
2438
if (scsi_sg_count(srb->cmd)) { /* with S/G */
2439
io_dir |= DMACMD_SG;
2440
DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR,
2442
sizeof(struct SGentry) *
2444
/* load how many bytes in the sg list table */
2445
DC395x_write32(acb, TRM_S1040_DMA_XCNT,
2446
((u32)(srb->sg_count -
2447
srb->sg_index) << 3));
2448
} else { /* without S/G */
2449
io_dir &= ~DMACMD_SG;
2450
DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR,
2451
srb->segment_x[0].address);
2452
DC395x_write32(acb, TRM_S1040_DMA_XCNT,
2453
srb->segment_x[0].length);
2455
/* load total transfer length (24bits) max value 16Mbyte */
2456
DC395x_write32(acb, TRM_S1040_SCSI_COUNTER,
2457
srb->total_xfer_length);
2458
DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2459
if (io_dir & DMACMD_DIR) { /* read */
2460
DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2462
DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir);
2464
DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir);
2465
DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2471
else if (srb->total_xfer_length > 0) { /* The last four bytes: Do PIO */
2473
* load what physical address of Scatter/Gather list table
2474
* want to be transfer
2476
srb->state |= SRB_DATA_XFER;
2477
/* load total transfer length (24bits) max value 16Mbyte */
2478
DC395x_write32(acb, TRM_S1040_SCSI_COUNTER,
2479
srb->total_xfer_length);
2480
DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2481
if (io_dir & DMACMD_DIR) { /* read */
2482
DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2484
} else { /* write */
2485
int ln = srb->total_xfer_length;
2486
size_t left_io = srb->total_xfer_length;
2488
if (srb->dcb->sync_period & WIDE_SYNC)
2489
DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2493
unsigned char *virt, *base = NULL;
2494
unsigned long flags = 0;
2495
size_t len = left_io;
2496
size_t offset = srb->request_length - left_io;
2498
local_irq_save(flags);
2499
/* Again, max 4 bytes */
2500
base = scsi_kmap_atomic_sg(scsi_sglist(srb->cmd),
2501
srb->sg_count, &offset, &len);
2502
virt = base + offset;
2507
if (debug_enabled(DBG_PIO))
2508
printk(" %02x", *virt);
2510
DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *virt++);
2512
sg_subtract_one(srb);
2515
scsi_kunmap_atomic_sg(base);
2516
local_irq_restore(flags);
2518
if (srb->dcb->sync_period & WIDE_SYNC) {
2520
DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
2521
if (debug_enabled(DBG_PIO))
2524
DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2526
/*DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, ln); */
2527
if (debug_enabled(DBG_PIO))
2529
DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2533
#endif /* DC395x_LASTPIO */
2534
else { /* xfer pad */
2535
u8 data = 0, data2 = 0;
2536
if (srb->sg_count) {
2537
srb->adapter_status = H_OVER_UNDER_RUN;
2538
srb->status |= OVER_RUN;
2541
* KG: despite the fact that we are using 16 bits I/O ops
2542
* the SCSI FIFO is only 8 bits according to the docs
2543
* (we can set bit 1 in 0x8f to serialize FIFO access ...)
2545
if (dcb->sync_period & WIDE_SYNC) {
2546
DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 2);
2547
DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2549
if (io_dir & DMACMD_DIR) {
2550
data = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2551
data2 = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2553
/* Danger, Robinson: If you find KGs
2554
* scattered over the wide disk, the driver
2555
* or chip is to blame :-( */
2556
DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K');
2557
DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'G');
2559
DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2561
DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1);
2562
/* Danger, Robinson: If you find a collection of Ks on your disk
2563
* something broke :-( */
2564
if (io_dir & DMACMD_DIR)
2565
data = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2567
DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K');
2569
srb->state |= SRB_XFERPAD;
2570
DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2572
bval = (io_dir & DMACMD_DIR) ? SCMD_FIFO_IN : SCMD_FIFO_OUT;
2573
DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, bval);
2578
static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2581
dprintkdbg(DBG_0, "status_phase0: (0x%p) <%02i-%i>\n",
2582
srb->cmd, srb->cmd->device->id, srb->cmd->device->lun);
2583
srb->target_status = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2584
srb->end_message = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); /* get message */
2585
srb->state = SRB_COMPLETED;
2586
*pscsi_status = PH_BUS_FREE; /*.. initial phase */
2587
DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2588
DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
2592
static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2595
dprintkdbg(DBG_0, "status_phase1: (0x%p) <%02i-%i>\n",
2596
srb->cmd, srb->cmd->device->id, srb->cmd->device->lun);
2597
srb->state = SRB_STATUS;
2598
DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2599
DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_COMP);
2603
/* Check if the message is complete */
2604
static inline u8 msgin_completed(u8 * msgbuf, u32 len)
2606
if (*msgbuf == EXTENDED_MESSAGE) {
2609
if (len < msgbuf[1] + 2)
2611
} else if (*msgbuf >= 0x20 && *msgbuf <= 0x2f) /* two byte messages */
2618
static inline void msgin_reject(struct AdapterCtlBlk *acb,
2619
struct ScsiReqBlk *srb)
2621
srb->msgout_buf[0] = MESSAGE_REJECT;
2623
DC395x_ENABLE_MSGOUT;
2624
srb->state &= ~SRB_MSGIN;
2625
srb->state |= SRB_MSGOUT;
2626
dprintkl(KERN_INFO, "msgin_reject: 0x%02x <%02i-%i>\n",
2628
srb->dcb->target_id, srb->dcb->target_lun);
2632
static struct ScsiReqBlk *msgin_qtag(struct AdapterCtlBlk *acb,
2633
struct DeviceCtlBlk *dcb, u8 tag)
2635
struct ScsiReqBlk *srb = NULL;
2636
struct ScsiReqBlk *i;
2637
dprintkdbg(DBG_0, "msgin_qtag: (0x%p) tag=%i srb=%p\n",
2638
srb->cmd, tag, srb);
2640
if (!(dcb->tag_mask & (1 << tag)))
2641
dprintkl(KERN_DEBUG,
2642
"msgin_qtag: tag_mask=0x%08x does not reserve tag %i!\n",
2643
dcb->tag_mask, tag);
2645
if (list_empty(&dcb->srb_going_list))
2647
list_for_each_entry(i, &dcb->srb_going_list, list) {
2648
if (i->tag_number == tag) {
2656
dprintkdbg(DBG_0, "msgin_qtag: (0x%p) <%02i-%i>\n",
2657
srb->cmd, srb->dcb->target_id, srb->dcb->target_lun);
2658
if (dcb->flag & ABORT_DEV_) {
2659
/*srb->state = SRB_ABORT_SENT; */
2660
enable_msgout_abort(acb, srb);
2663
if (!(srb->state & SRB_DISCONNECT))
2666
memcpy(srb->msgin_buf, dcb->active_srb->msgin_buf, acb->msg_len);
2667
srb->state |= dcb->active_srb->state;
2668
srb->state |= SRB_DATA_XFER;
2669
dcb->active_srb = srb;
2670
/* How can we make the DORS happy? */
2675
srb->state = SRB_UNEXPECT_RESEL;
2676
dcb->active_srb = srb;
2677
srb->msgout_buf[0] = MSG_ABORT_TAG;
2679
DC395x_ENABLE_MSGOUT;
2680
dprintkl(KERN_DEBUG, "msgin_qtag: Unknown tag %i - abort\n", tag);
2685
static inline void reprogram_regs(struct AdapterCtlBlk *acb,
2686
struct DeviceCtlBlk *dcb)
2688
DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id);
2689
DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period);
2690
DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset);
2691
set_xfer_rate(acb, dcb);
2695
/* set async transfer mode */
2696
static void msgin_set_async(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2698
struct DeviceCtlBlk *dcb = srb->dcb;
2699
dprintkl(KERN_DEBUG, "msgin_set_async: No sync transfers <%02i-%i>\n",
2700
dcb->target_id, dcb->target_lun);
2702
dcb->sync_mode &= ~(SYNC_NEGO_ENABLE);
2703
dcb->sync_mode |= SYNC_NEGO_DONE;
2704
/*dcb->sync_period &= 0; */
2705
dcb->sync_offset = 0;
2706
dcb->min_nego_period = 200 >> 2; /* 200ns <=> 5 MHz */
2707
srb->state &= ~SRB_DO_SYNC_NEGO;
2708
reprogram_regs(acb, dcb);
2709
if ((dcb->sync_mode & WIDE_NEGO_ENABLE)
2710
&& !(dcb->sync_mode & WIDE_NEGO_DONE)) {
2711
build_wdtr(acb, dcb, srb);
2712
DC395x_ENABLE_MSGOUT;
2713
dprintkdbg(DBG_0, "msgin_set_async(rej): Try WDTR anyway\n");
2718
/* set sync transfer mode */
2719
static void msgin_set_sync(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2721
struct DeviceCtlBlk *dcb = srb->dcb;
2724
dprintkdbg(DBG_1, "msgin_set_sync: <%02i> Sync: %ins "
2725
"(%02i.%01i MHz) Offset %i\n",
2726
dcb->target_id, srb->msgin_buf[3] << 2,
2727
(250 / srb->msgin_buf[3]),
2728
((250 % srb->msgin_buf[3]) * 10) / srb->msgin_buf[3],
2731
if (srb->msgin_buf[4] > 15)
2732
srb->msgin_buf[4] = 15;
2733
if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO))
2734
dcb->sync_offset = 0;
2735
else if (dcb->sync_offset == 0)
2736
dcb->sync_offset = srb->msgin_buf[4];
2737
if (srb->msgin_buf[4] > dcb->sync_offset)
2738
srb->msgin_buf[4] = dcb->sync_offset;
2740
dcb->sync_offset = srb->msgin_buf[4];
2742
while (bval < 7 && (srb->msgin_buf[3] > clock_period[bval]
2743
|| dcb->min_nego_period >
2744
clock_period[bval]))
2746
if (srb->msgin_buf[3] < clock_period[bval])
2748
"msgin_set_sync: Increase sync nego period to %ins\n",
2749
clock_period[bval] << 2);
2750
srb->msgin_buf[3] = clock_period[bval];
2751
dcb->sync_period &= 0xf0;
2752
dcb->sync_period |= ALT_SYNC | bval;
2753
dcb->min_nego_period = srb->msgin_buf[3];
2755
if (dcb->sync_period & WIDE_SYNC)
2761
"Target %02i: %s Sync: %ins Offset %i (%02i.%01i MB/s)\n",
2762
dcb->target_id, (fact == 500) ? "Wide16" : "",
2763
dcb->min_nego_period << 2, dcb->sync_offset,
2764
(fact / dcb->min_nego_period),
2765
((fact % dcb->min_nego_period) * 10 +
2766
dcb->min_nego_period / 2) / dcb->min_nego_period);
2768
if (!(srb->state & SRB_DO_SYNC_NEGO)) {
2769
/* Reply with corrected SDTR Message */
2770
dprintkl(KERN_DEBUG, "msgin_set_sync: answer w/%ins %i\n",
2771
srb->msgin_buf[3] << 2, srb->msgin_buf[4]);
2773
memcpy(srb->msgout_buf, srb->msgin_buf, 5);
2775
DC395x_ENABLE_MSGOUT;
2776
dcb->sync_mode |= SYNC_NEGO_DONE;
2778
if ((dcb->sync_mode & WIDE_NEGO_ENABLE)
2779
&& !(dcb->sync_mode & WIDE_NEGO_DONE)) {
2780
build_wdtr(acb, dcb, srb);
2781
DC395x_ENABLE_MSGOUT;
2782
dprintkdbg(DBG_0, "msgin_set_sync: Also try WDTR\n");
2785
srb->state &= ~SRB_DO_SYNC_NEGO;
2786
dcb->sync_mode |= SYNC_NEGO_DONE | SYNC_NEGO_ENABLE;
2788
reprogram_regs(acb, dcb);
2792
static inline void msgin_set_nowide(struct AdapterCtlBlk *acb,
2793
struct ScsiReqBlk *srb)
2795
struct DeviceCtlBlk *dcb = srb->dcb;
2796
dprintkdbg(DBG_1, "msgin_set_nowide: <%02i>\n", dcb->target_id);
2798
dcb->sync_period &= ~WIDE_SYNC;
2799
dcb->sync_mode &= ~(WIDE_NEGO_ENABLE);
2800
dcb->sync_mode |= WIDE_NEGO_DONE;
2801
srb->state &= ~SRB_DO_WIDE_NEGO;
2802
reprogram_regs(acb, dcb);
2803
if ((dcb->sync_mode & SYNC_NEGO_ENABLE)
2804
&& !(dcb->sync_mode & SYNC_NEGO_DONE)) {
2805
build_sdtr(acb, dcb, srb);
2806
DC395x_ENABLE_MSGOUT;
2807
dprintkdbg(DBG_0, "msgin_set_nowide: Rejected. Try SDTR anyway\n");
2811
static void msgin_set_wide(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2813
struct DeviceCtlBlk *dcb = srb->dcb;
2814
u8 wide = (dcb->dev_mode & NTC_DO_WIDE_NEGO
2815
&& acb->config & HCC_WIDE_CARD) ? 1 : 0;
2816
dprintkdbg(DBG_1, "msgin_set_wide: <%02i>\n", dcb->target_id);
2818
if (srb->msgin_buf[3] > wide)
2819
srb->msgin_buf[3] = wide;
2821
if (!(srb->state & SRB_DO_WIDE_NEGO)) {
2822
dprintkl(KERN_DEBUG,
2823
"msgin_set_wide: Wide nego initiated <%02i>\n",
2825
memcpy(srb->msgout_buf, srb->msgin_buf, 4);
2827
srb->state |= SRB_DO_WIDE_NEGO;
2828
DC395x_ENABLE_MSGOUT;
2831
dcb->sync_mode |= (WIDE_NEGO_ENABLE | WIDE_NEGO_DONE);
2832
if (srb->msgin_buf[3] > 0)
2833
dcb->sync_period |= WIDE_SYNC;
2835
dcb->sync_period &= ~WIDE_SYNC;
2836
srb->state &= ~SRB_DO_WIDE_NEGO;
2837
/*dcb->sync_mode &= ~(WIDE_NEGO_ENABLE+WIDE_NEGO_DONE); */
2839
"msgin_set_wide: Wide (%i bit) negotiated <%02i>\n",
2840
(8 << srb->msgin_buf[3]), dcb->target_id);
2841
reprogram_regs(acb, dcb);
2842
if ((dcb->sync_mode & SYNC_NEGO_ENABLE)
2843
&& !(dcb->sync_mode & SYNC_NEGO_DONE)) {
2844
build_sdtr(acb, dcb, srb);
2845
DC395x_ENABLE_MSGOUT;
2846
dprintkdbg(DBG_0, "msgin_set_wide: Also try SDTR.\n");
2852
* extended message codes:
2857
* 00h MODIFY DATA POINTER
2858
* 01h SYNCHRONOUS DATA TRANSFER REQUEST
2859
* 03h WIDE DATA TRANSFER REQUEST
2860
* 04h - 7Fh Reserved
2861
* 80h - FFh Vendor specific
2863
static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2866
struct DeviceCtlBlk *dcb = acb->active_dcb;
2867
dprintkdbg(DBG_0, "msgin_phase0: (0x%p)\n", srb->cmd);
2869
srb->msgin_buf[acb->msg_len++] = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2870
if (msgin_completed(srb->msgin_buf, acb->msg_len)) {
2871
/* Now eval the msg */
2872
switch (srb->msgin_buf[0]) {
2874
srb->state = SRB_DISCONNECT;
2877
case SIMPLE_QUEUE_TAG:
2878
case HEAD_OF_QUEUE_TAG:
2879
case ORDERED_QUEUE_TAG:
2881
msgin_qtag(acb, dcb,
2885
case MESSAGE_REJECT:
2886
DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
2887
DO_CLRATN | DO_DATALATCH);
2888
/* A sync nego message was rejected ! */
2889
if (srb->state & SRB_DO_SYNC_NEGO) {
2890
msgin_set_async(acb, srb);
2893
/* A wide nego message was rejected ! */
2894
if (srb->state & SRB_DO_WIDE_NEGO) {
2895
msgin_set_nowide(acb, srb);
2898
enable_msgout_abort(acb, srb);
2899
/*srb->state |= SRB_ABORT_SENT */
2902
case EXTENDED_MESSAGE:
2904
if (srb->msgin_buf[1] == 3
2905
&& srb->msgin_buf[2] == EXTENDED_SDTR) {
2906
msgin_set_sync(acb, srb);
2910
if (srb->msgin_buf[1] == 2
2911
&& srb->msgin_buf[2] == EXTENDED_WDTR
2912
&& srb->msgin_buf[3] <= 2) { /* sanity check ... */
2913
msgin_set_wide(acb, srb);
2916
msgin_reject(acb, srb);
2919
case MSG_IGNOREWIDE:
2920
/* Discard wide residual */
2921
dprintkdbg(DBG_0, "msgin_phase0: Ignore Wide Residual!\n");
2924
case COMMAND_COMPLETE:
2925
/* nothing has to be done */
2930
* SAVE POINTER may be ignored as we have the struct
2931
* ScsiReqBlk* associated with the scsi command.
2933
dprintkdbg(DBG_0, "msgin_phase0: (0x%p) "
2934
"SAVE POINTER rem=%i Ignore\n",
2935
srb->cmd, srb->total_xfer_length);
2938
case RESTORE_POINTERS:
2939
dprintkdbg(DBG_0, "msgin_phase0: RESTORE POINTER. Ignore\n");
2943
dprintkdbg(DBG_0, "msgin_phase0: (0x%p) "
2944
"<%02i-%i> ABORT msg\n",
2945
srb->cmd, dcb->target_id,
2947
dcb->flag |= ABORT_DEV_;
2948
enable_msgout_abort(acb, srb);
2952
/* reject unknown messages */
2953
if (srb->msgin_buf[0] & IDENTIFY_BASE) {
2954
dprintkdbg(DBG_0, "msgin_phase0: Identify msg\n");
2956
srb->msgout_buf[0] = dcb->identify_msg;
2957
DC395x_ENABLE_MSGOUT;
2958
srb->state |= SRB_MSGOUT;
2961
msgin_reject(acb, srb);
2964
/* Clear counter and MsgIn state */
2965
srb->state &= ~SRB_MSGIN;
2968
*pscsi_status = PH_BUS_FREE;
2969
DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important ... you know! */
2970
DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
2974
static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2977
dprintkdbg(DBG_0, "msgin_phase1: (0x%p)\n", srb->cmd);
2978
clear_fifo(acb, "msgin_phase1");
2979
DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1);
2980
if (!(srb->state & SRB_MSGIN)) {
2981
srb->state &= ~SRB_DISCONNECT;
2982
srb->state |= SRB_MSGIN;
2984
DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
2986
DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_IN);
2990
static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2996
static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
3002
static void set_xfer_rate(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb)
3004
struct DeviceCtlBlk *i;
3006
/* set all lun device's period, offset */
3007
if (dcb->identify_msg & 0x07)
3010
if (acb->scan_devices) {
3011
current_sync_offset = dcb->sync_offset;
3015
list_for_each_entry(i, &acb->dcb_list, list)
3016
if (i->target_id == dcb->target_id) {
3017
i->sync_period = dcb->sync_period;
3018
i->sync_offset = dcb->sync_offset;
3019
i->sync_mode = dcb->sync_mode;
3020
i->min_nego_period = dcb->min_nego_period;
3025
static void disconnect(struct AdapterCtlBlk *acb)
3027
struct DeviceCtlBlk *dcb = acb->active_dcb;
3028
struct ScsiReqBlk *srb;
3031
dprintkl(KERN_ERR, "disconnect: No such device\n");
3033
/* Suspend queue for a while */
3034
acb->scsi_host->last_reset =
3036
HZ * acb->eeprom.delay_time;
3037
clear_fifo(acb, "disconnectEx");
3038
DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT);
3041
srb = dcb->active_srb;
3042
acb->active_dcb = NULL;
3043
dprintkdbg(DBG_0, "disconnect: (0x%p)\n", srb->cmd);
3045
srb->scsi_phase = PH_BUS_FREE; /* initial phase */
3046
clear_fifo(acb, "disconnect");
3047
DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT);
3048
if (srb->state & SRB_UNEXPECT_RESEL) {
3050
"disconnect: Unexpected reselection <%02i-%i>\n",
3051
dcb->target_id, dcb->target_lun);
3053
waiting_process_next(acb);
3054
} else if (srb->state & SRB_ABORT_SENT) {
3055
dcb->flag &= ~ABORT_DEV_;
3056
acb->scsi_host->last_reset = jiffies + HZ / 2 + 1;
3057
dprintkl(KERN_ERR, "disconnect: SRB_ABORT_SENT\n");
3058
doing_srb_done(acb, DID_ABORT, srb->cmd, 1);
3059
waiting_process_next(acb);
3061
if ((srb->state & (SRB_START_ + SRB_MSGOUT))
3063
state & (SRB_DISCONNECT + SRB_COMPLETED))) {
3065
* Selection time out
3066
* SRB_START_ || SRB_MSGOUT || (!SRB_DISCONNECT && !SRB_COMPLETED)
3068
/* Unexp. Disc / Sel Timeout */
3069
if (srb->state != SRB_START_
3070
&& srb->state != SRB_MSGOUT) {
3071
srb->state = SRB_READY;
3072
dprintkl(KERN_DEBUG,
3073
"disconnect: (0x%p) Unexpected\n",
3075
srb->target_status = SCSI_STAT_SEL_TIMEOUT;
3078
/* Normal selection timeout */
3079
dprintkdbg(DBG_KG, "disconnect: (0x%p) "
3080
"<%02i-%i> SelTO\n", srb->cmd,
3081
dcb->target_id, dcb->target_lun);
3082
if (srb->retry_count++ > DC395x_MAX_RETRIES
3083
|| acb->scan_devices) {
3084
srb->target_status =
3085
SCSI_STAT_SEL_TIMEOUT;
3089
srb_going_to_waiting_move(dcb, srb);
3091
"disconnect: (0x%p) Retry\n",
3093
waiting_set_timer(acb, HZ / 20);
3095
} else if (srb->state & SRB_DISCONNECT) {
3096
u8 bval = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
3098
* SRB_DISCONNECT (This is what we expect!)
3101
dprintkdbg(DBG_0, "disconnect: SCSI bus stat "
3102
" 0x%02x: ACK set! Other controllers?\n",
3104
/* It could come from another initiator, therefore don't do much ! */
3106
waiting_process_next(acb);
3107
} else if (srb->state & SRB_COMPLETED) {
3113
dcb->active_srb = NULL;
3114
srb->state = SRB_FREE;
3115
srb_done(acb, dcb, srb);
3121
static void reselect(struct AdapterCtlBlk *acb)
3123
struct DeviceCtlBlk *dcb = acb->active_dcb;
3124
struct ScsiReqBlk *srb = NULL;
3125
u16 rsel_tar_lun_id;
3128
dprintkdbg(DBG_0, "reselect: acb=%p\n", acb);
3130
clear_fifo(acb, "reselect");
3131
/*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT | DO_DATALATCH); */
3132
/* Read Reselected Target ID and LUN */
3133
rsel_tar_lun_id = DC395x_read16(acb, TRM_S1040_SCSI_TARGETID);
3134
if (dcb) { /* Arbitration lost but Reselection win */
3135
srb = dcb->active_srb;
3137
dprintkl(KERN_DEBUG, "reselect: Arb lost Resel won, "
3138
"but active_srb == NULL\n");
3139
DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
3143
if (!acb->scan_devices) {
3144
dprintkdbg(DBG_KG, "reselect: (0x%p) <%02i-%i> "
3145
"Arb lost but Resel win rsel=%i stat=0x%04x\n",
3146
srb->cmd, dcb->target_id,
3147
dcb->target_lun, rsel_tar_lun_id,
3148
DC395x_read16(acb, TRM_S1040_SCSI_STATUS));
3150
/*srb->state |= SRB_DISCONNECT; */
3152
srb->state = SRB_READY;
3154
srb_going_to_waiting_move(dcb, srb);
3155
waiting_set_timer(acb, HZ / 20);
3160
/* Read Reselected Target Id and LUN */
3161
if (!(rsel_tar_lun_id & (IDENTIFY_BASE << 8)))
3162
dprintkl(KERN_DEBUG, "reselect: Expects identify msg. "
3163
"Got %i!\n", rsel_tar_lun_id);
3164
id = rsel_tar_lun_id & 0xff;
3165
lun = (rsel_tar_lun_id >> 8) & 7;
3166
dcb = find_dcb(acb, id, lun);
3168
dprintkl(KERN_ERR, "reselect: From non existent device "
3169
"<%02i-%i>\n", id, lun);
3170
DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
3173
acb->active_dcb = dcb;
3175
if (!(dcb->dev_mode & NTC_DO_DISCONNECT))
3176
dprintkl(KERN_DEBUG, "reselect: in spite of forbidden "
3177
"disconnection? <%02i-%i>\n",
3178
dcb->target_id, dcb->target_lun);
3180
if (dcb->sync_mode & EN_TAG_QUEUEING /*&& !arblostflag */) {
3182
dcb->active_srb = srb;
3184
/* There can be only one! */
3185
srb = dcb->active_srb;
3186
if (!srb || !(srb->state & SRB_DISCONNECT)) {
3190
dprintkl(KERN_DEBUG,
3191
"reselect: w/o disconnected cmds <%02i-%i>\n",
3192
dcb->target_id, dcb->target_lun);
3194
srb->state = SRB_UNEXPECT_RESEL;
3195
dcb->active_srb = srb;
3196
enable_msgout_abort(acb, srb);
3198
if (dcb->flag & ABORT_DEV_) {
3199
/*srb->state = SRB_ABORT_SENT; */
3200
enable_msgout_abort(acb, srb);
3202
srb->state = SRB_DATA_XFER;
3206
srb->scsi_phase = PH_BUS_FREE; /* initial phase */
3208
/* Program HA ID, target ID, period and offset */
3209
dprintkdbg(DBG_0, "reselect: select <%i>\n", dcb->target_id);
3210
DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id); /* host ID */
3211
DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id); /* target ID */
3212
DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset); /* offset */
3213
DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period); /* sync period, wide */
3214
DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
3216
DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
3220
static inline u8 tagq_blacklist(char *name)
3222
#ifndef DC395x_NO_TAGQ
3225
for (i = 0; i < BADDEVCNT; i++)
3226
if (memcmp(name, DC395x_baddevname1[i], 28) == 0)
3236
static void disc_tagq_set(struct DeviceCtlBlk *dcb, struct ScsiInqData *ptr)
3238
/* Check for SCSI format (ANSI and Response data format) */
3239
if ((ptr->Vers & 0x07) >= 2 || (ptr->RDF & 0x0F) == 2) {
3240
if ((ptr->Flags & SCSI_INQ_CMDQUEUE)
3241
&& (dcb->dev_mode & NTC_DO_TAG_QUEUEING) &&
3242
/*(dcb->dev_mode & NTC_DO_DISCONNECT) */
3243
/* ((dcb->dev_type == TYPE_DISK)
3244
|| (dcb->dev_type == TYPE_MOD)) && */
3245
!tagq_blacklist(((char *)ptr) + 8)) {
3246
if (dcb->max_command == 1)
3248
dcb->acb->tag_max_num;
3249
dcb->sync_mode |= EN_TAG_QUEUEING;
3250
/*dcb->tag_mask = 0; */
3252
dcb->max_command = 1;
3257
static void add_dev(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3258
struct ScsiInqData *ptr)
3260
u8 bval1 = ptr->DevType & SCSI_DEVTYPE;
3261
dcb->dev_type = bval1;
3262
/* if (bval1 == TYPE_DISK || bval1 == TYPE_MOD) */
3263
disc_tagq_set(dcb, ptr);
3267
/* unmap mapped pci regions from SRB */
3268
static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
3270
struct scsi_cmnd *cmd = srb->cmd;
3271
enum dma_data_direction dir = cmd->sc_data_direction;
3273
if (scsi_sg_count(cmd) && dir != PCI_DMA_NONE) {
3274
/* unmap DC395x SG list */
3275
dprintkdbg(DBG_SG, "pci_unmap_srb: list=%08x(%05x)\n",
3276
srb->sg_bus_addr, SEGMENTX_LEN);
3277
pci_unmap_single(acb->dev, srb->sg_bus_addr,
3280
dprintkdbg(DBG_SG, "pci_unmap_srb: segs=%i buffer=%p\n",
3281
scsi_sg_count(cmd), scsi_bufflen(cmd));
3282
/* unmap the sg segments */
3283
scsi_dma_unmap(cmd);
3288
/* unmap mapped pci sense buffer from SRB */
3289
static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb,
3290
struct ScsiReqBlk *srb)
3292
if (!(srb->flag & AUTO_REQSENSE))
3294
/* Unmap sense buffer */
3295
dprintkdbg(DBG_SG, "pci_unmap_srb_sense: buffer=%08x\n",
3296
srb->segment_x[0].address);
3297
pci_unmap_single(acb->dev, srb->segment_x[0].address,
3298
srb->segment_x[0].length, PCI_DMA_FROMDEVICE);
3299
/* Restore SG stuff */
3300
srb->total_xfer_length = srb->xferred;
3301
srb->segment_x[0].address =
3302
srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address;
3303
srb->segment_x[0].length =
3304
srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length;
3309
* Complete execution of a SCSI command
3310
* Signal completion to the generic SCSI driver
3312
static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3313
struct ScsiReqBlk *srb)
3316
struct scsi_cmnd *cmd = srb->cmd;
3317
enum dma_data_direction dir = cmd->sc_data_direction;
3320
dprintkdbg(DBG_1, "srb_done: (0x%p) <%02i-%i>\n", srb->cmd,
3321
srb->cmd->device->id, srb->cmd->device->lun);
3322
dprintkdbg(DBG_SG, "srb_done: srb=%p sg=%i(%i/%i) buf=%p\n",
3323
srb, scsi_sg_count(cmd), srb->sg_index, srb->sg_count,
3325
status = srb->target_status;
3326
if (srb->flag & AUTO_REQSENSE) {
3327
dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE1\n");
3328
pci_unmap_srb_sense(acb, srb);
3330
** target status..........................
3332
srb->flag &= ~AUTO_REQSENSE;
3333
srb->adapter_status = 0;
3334
srb->target_status = CHECK_CONDITION << 1;
3335
if (debug_enabled(DBG_1)) {
3336
switch (cmd->sense_buffer[2] & 0x0f) {
3338
dprintkl(KERN_DEBUG,
3339
"ReqSense: NOT_READY cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3340
cmd->cmnd[0], dcb->target_id,
3341
dcb->target_lun, status, acb->scan_devices);
3343
case UNIT_ATTENTION:
3344
dprintkl(KERN_DEBUG,
3345
"ReqSense: UNIT_ATTENTION cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3346
cmd->cmnd[0], dcb->target_id,
3347
dcb->target_lun, status, acb->scan_devices);
3349
case ILLEGAL_REQUEST:
3350
dprintkl(KERN_DEBUG,
3351
"ReqSense: ILLEGAL_REQUEST cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3352
cmd->cmnd[0], dcb->target_id,
3353
dcb->target_lun, status, acb->scan_devices);
3356
dprintkl(KERN_DEBUG,
3357
"ReqSense: MEDIUM_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3358
cmd->cmnd[0], dcb->target_id,
3359
dcb->target_lun, status, acb->scan_devices);
3361
case HARDWARE_ERROR:
3362
dprintkl(KERN_DEBUG,
3363
"ReqSense: HARDWARE_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3364
cmd->cmnd[0], dcb->target_id,
3365
dcb->target_lun, status, acb->scan_devices);
3368
if (cmd->sense_buffer[7] >= 6)
3369
printk("sense=0x%02x ASC=0x%02x ASCQ=0x%02x "
3370
"(0x%08x 0x%08x)\n",
3371
cmd->sense_buffer[2], cmd->sense_buffer[12],
3372
cmd->sense_buffer[13],
3373
*((unsigned int *)(cmd->sense_buffer + 3)),
3374
*((unsigned int *)(cmd->sense_buffer + 8)));
3376
printk("sense=0x%02x No ASC/ASCQ (0x%08x)\n",
3377
cmd->sense_buffer[2],
3378
*((unsigned int *)(cmd->sense_buffer + 3)));
3381
if (status == (CHECK_CONDITION << 1)) {
3382
cmd->result = DID_BAD_TARGET << 16;
3385
dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE2\n");
3387
if (srb->total_xfer_length
3388
&& srb->total_xfer_length >= cmd->underflow)
3390
MK_RES_LNX(DRIVER_SENSE, DID_OK,
3391
srb->end_message, CHECK_CONDITION);
3392
/*SET_RES_DID(cmd->result,DID_OK) */
3395
MK_RES_LNX(DRIVER_SENSE, DID_OK,
3396
srb->end_message, CHECK_CONDITION);
3401
/*************************************************************/
3404
* target status..........................
3406
if (status_byte(status) == CHECK_CONDITION) {
3407
request_sense(acb, dcb, srb);
3409
} else if (status_byte(status) == QUEUE_FULL) {
3410
tempcnt = (u8)list_size(&dcb->srb_going_list);
3411
dprintkl(KERN_INFO, "QUEUE_FULL for dev <%02i-%i> with %i cmnds\n",
3412
dcb->target_id, dcb->target_lun, tempcnt);
3415
dcb->max_command = tempcnt;
3417
srb_going_to_waiting_move(dcb, srb);
3418
waiting_set_timer(acb, HZ / 20);
3419
srb->adapter_status = 0;
3420
srb->target_status = 0;
3422
} else if (status == SCSI_STAT_SEL_TIMEOUT) {
3423
srb->adapter_status = H_SEL_TIMEOUT;
3424
srb->target_status = 0;
3425
cmd->result = DID_NO_CONNECT << 16;
3427
srb->adapter_status = 0;
3428
SET_RES_DID(cmd->result, DID_ERROR);
3429
SET_RES_MSG(cmd->result, srb->end_message);
3430
SET_RES_TARGET(cmd->result, status);
3435
** process initiator status..........................
3437
status = srb->adapter_status;
3438
if (status & H_OVER_UNDER_RUN) {
3439
srb->target_status = 0;
3440
SET_RES_DID(cmd->result, DID_OK);
3441
SET_RES_MSG(cmd->result, srb->end_message);
3442
} else if (srb->status & PARITY_ERROR) {
3443
SET_RES_DID(cmd->result, DID_PARITY);
3444
SET_RES_MSG(cmd->result, srb->end_message);
3445
} else { /* No error */
3447
srb->adapter_status = 0;
3448
srb->target_status = 0;
3449
SET_RES_DID(cmd->result, DID_OK);
3453
if (dir != PCI_DMA_NONE && scsi_sg_count(cmd))
3454
pci_dma_sync_sg_for_cpu(acb->dev, scsi_sglist(cmd),
3455
scsi_sg_count(cmd), dir);
3458
/* Check Error Conditions */
3461
if (cmd->cmnd[0] == INQUIRY) {
3462
unsigned char *base = NULL;
3463
struct ScsiInqData *ptr;
3464
unsigned long flags = 0;
3465
struct scatterlist* sg = scsi_sglist(cmd);
3466
size_t offset = 0, len = sizeof(struct ScsiInqData);
3468
local_irq_save(flags);
3469
base = scsi_kmap_atomic_sg(sg, scsi_sg_count(cmd), &offset, &len);
3470
ptr = (struct ScsiInqData *)(base + offset);
3472
if (!ckc_only && (cmd->result & RES_DID) == 0
3473
&& cmd->cmnd[2] == 0 && scsi_bufflen(cmd) >= 8
3474
&& dir != PCI_DMA_NONE && ptr && (ptr->Vers & 0x07) >= 2)
3475
dcb->inquiry7 = ptr->Flags;
3477
/*if( srb->cmd->cmnd[0] == INQUIRY && */
3478
/* (host_byte(cmd->result) == DID_OK || status_byte(cmd->result) & CHECK_CONDITION) ) */
3479
if ((cmd->result == (DID_OK << 16)
3480
|| status_byte(cmd->result) &
3482
if (!dcb->init_tcq_flag) {
3483
add_dev(acb, dcb, ptr);
3484
dcb->init_tcq_flag = 1;
3488
scsi_kunmap_atomic_sg(base);
3489
local_irq_restore(flags);
3492
/* Here is the info for Doug Gilbert's sg3 ... */
3493
scsi_set_resid(cmd, srb->total_xfer_length);
3494
/* This may be interpreted by sb. or not ... */
3495
cmd->SCp.this_residual = srb->total_xfer_length;
3496
cmd->SCp.buffers_residual = 0;
3497
if (debug_enabled(DBG_KG)) {
3498
if (srb->total_xfer_length)
3499
dprintkdbg(DBG_KG, "srb_done: (0x%p) <%02i-%i> "
3500
"cmnd=0x%02x Missed %i bytes\n",
3501
cmd, cmd->device->id, cmd->device->lun,
3502
cmd->cmnd[0], srb->total_xfer_length);
3505
srb_going_remove(dcb, srb);
3506
/* Add to free list */
3507
if (srb == acb->tmp_srb)
3508
dprintkl(KERN_ERR, "srb_done: ERROR! Completed cmd with tmp_srb\n");
3510
dprintkdbg(DBG_0, "srb_done: (0x%p) done result=0x%08x\n",
3512
srb_free_insert(acb, srb);
3514
pci_unmap_srb(acb, srb);
3516
cmd->scsi_done(cmd);
3517
waiting_process_next(acb);
3521
/* abort all cmds in our queues */
3522
static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_flag,
3523
struct scsi_cmnd *cmd, u8 force)
3525
struct DeviceCtlBlk *dcb;
3526
dprintkl(KERN_INFO, "doing_srb_done: pids ");
3528
list_for_each_entry(dcb, &acb->dcb_list, list) {
3529
struct ScsiReqBlk *srb;
3530
struct ScsiReqBlk *tmp;
3531
struct scsi_cmnd *p;
3533
list_for_each_entry_safe(srb, tmp, &dcb->srb_going_list, list) {
3534
enum dma_data_direction dir;
3538
dir = p->sc_data_direction;
3539
result = MK_RES(0, did_flag, 0, 0);
3540
printk("G:%p(%02i-%i) ", p,
3541
p->device->id, p->device->lun);
3542
srb_going_remove(dcb, srb);
3544
srb_free_insert(acb, srb);
3546
pci_unmap_srb_sense(acb, srb);
3547
pci_unmap_srb(acb, srb);
3549
/* For new EH, we normally don't need to give commands back,
3550
* as they all complete or all time out */
3554
if (!list_empty(&dcb->srb_going_list))
3555
dprintkl(KERN_DEBUG,
3556
"How could the ML send cmnds to the Going queue? <%02i-%i>\n",
3557
dcb->target_id, dcb->target_lun);
3559
dprintkl(KERN_DEBUG,
3560
"tag_mask for <%02i-%i> should be empty, is %08x!\n",
3561
dcb->target_id, dcb->target_lun,
3565
list_for_each_entry_safe(srb, tmp, &dcb->srb_waiting_list, list) {
3569
result = MK_RES(0, did_flag, 0, 0);
3570
printk("W:%p<%02i-%i>", p, p->device->id,
3572
srb_waiting_remove(dcb, srb);
3573
srb_free_insert(acb, srb);
3575
pci_unmap_srb_sense(acb, srb);
3576
pci_unmap_srb(acb, srb);
3578
/* For new EH, we normally don't need to give commands back,
3579
* as they all complete or all time out */
3580
cmd->scsi_done(cmd);
3583
if (!list_empty(&dcb->srb_waiting_list))
3584
dprintkl(KERN_DEBUG, "ML queued %i cmnds again to <%02i-%i>\n",
3585
list_size(&dcb->srb_waiting_list), dcb->target_id,
3587
dcb->flag &= ~ABORT_DEV_;
3593
static void reset_scsi_bus(struct AdapterCtlBlk *acb)
3595
dprintkdbg(DBG_0, "reset_scsi_bus: acb=%p\n", acb);
3596
acb->acb_flag |= RESET_DEV; /* RESET_DETECT, RESET_DONE, RESET_DEV */
3597
DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI);
3599
while (!(DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET))
3604
static void set_basic_config(struct AdapterCtlBlk *acb)
3608
DC395x_write8(acb, TRM_S1040_SCSI_TIMEOUT, acb->sel_timeout);
3609
if (acb->config & HCC_PARITY)
3610
bval = PHASELATCH | INITIATOR | BLOCKRST | PARITYCHECK;
3612
bval = PHASELATCH | INITIATOR | BLOCKRST;
3614
DC395x_write8(acb, TRM_S1040_SCSI_CONFIG0, bval);
3616
/* program configuration 1: Act_Neg (+ Act_Neg_Enh? + Fast_Filter? + DataDis?) */
3617
DC395x_write8(acb, TRM_S1040_SCSI_CONFIG1, 0x03); /* was 0x13: default */
3618
/* program Host ID */
3619
DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id);
3620
/* set ansynchronous transfer */
3621
DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, 0x00);
3622
/* Turn LED control off */
3623
wval = DC395x_read16(acb, TRM_S1040_GEN_CONTROL) & 0x7F;
3624
DC395x_write16(acb, TRM_S1040_GEN_CONTROL, wval);
3626
wval = DC395x_read16(acb, TRM_S1040_DMA_CONFIG) & ~DMA_FIFO_CTRL;
3628
DMA_FIFO_HALF_HALF | DMA_ENHANCE /*| DMA_MEM_MULTI_READ */ ;
3629
DC395x_write16(acb, TRM_S1040_DMA_CONFIG, wval);
3630
/* Clear pending interrupt status */
3631
DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
3632
/* Enable SCSI interrupt */
3633
DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x7F);
3634
DC395x_write8(acb, TRM_S1040_DMA_INTEN, EN_SCSIINTR | EN_DMAXFERERROR
3635
/*| EN_DMAXFERABORT | EN_DMAXFERCOMP | EN_FORCEDMACOMP */
3640
static void scsi_reset_detect(struct AdapterCtlBlk *acb)
3642
dprintkl(KERN_INFO, "scsi_reset_detect: acb=%p\n", acb);
3643
/* delay half a second */
3644
if (timer_pending(&acb->waiting_timer))
3645
del_timer(&acb->waiting_timer);
3647
DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
3648
DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
3649
/*DC395x_write8(acb, TRM_S1040_DMA_CONTROL,STOPDMAXFER); */
3651
/* Maybe we locked up the bus? Then lets wait even longer ... */
3652
acb->scsi_host->last_reset =
3653
jiffies + 5 * HZ / 2 +
3654
HZ * acb->eeprom.delay_time;
3656
clear_fifo(acb, "scsi_reset_detect");
3657
set_basic_config(acb);
3659
/*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT); */
3661
if (acb->acb_flag & RESET_DEV) { /* RESET_DETECT, RESET_DONE, RESET_DEV */
3662
acb->acb_flag |= RESET_DONE;
3664
acb->acb_flag |= RESET_DETECT;
3665
reset_dev_param(acb);
3666
doing_srb_done(acb, DID_RESET, NULL, 1);
3667
/*DC395x_RecoverSRB( acb ); */
3668
acb->active_dcb = NULL;
3670
waiting_process_next(acb);
3675
static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3676
struct ScsiReqBlk *srb)
3678
struct scsi_cmnd *cmd = srb->cmd;
3679
dprintkdbg(DBG_1, "request_sense: (0x%p) <%02i-%i>\n",
3680
cmd, cmd->device->id, cmd->device->lun);
3682
srb->flag |= AUTO_REQSENSE;
3683
srb->adapter_status = 0;
3684
srb->target_status = 0;
3686
/* KG: Can this prevent crap sense data ? */
3687
memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
3689
/* Save some data */
3690
srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address =
3691
srb->segment_x[0].address;
3692
srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length =
3693
srb->segment_x[0].length;
3694
srb->xferred = srb->total_xfer_length;
3695
/* srb->segment_x : a one entry of S/G list table */
3696
srb->total_xfer_length = SCSI_SENSE_BUFFERSIZE;
3697
srb->segment_x[0].length = SCSI_SENSE_BUFFERSIZE;
3698
/* Map sense buffer */
3699
srb->segment_x[0].address =
3700
pci_map_single(acb->dev, cmd->sense_buffer,
3701
SCSI_SENSE_BUFFERSIZE, PCI_DMA_FROMDEVICE);
3702
dprintkdbg(DBG_SG, "request_sense: map buffer %p->%08x(%05x)\n",
3703
cmd->sense_buffer, srb->segment_x[0].address,
3704
SCSI_SENSE_BUFFERSIZE);
3708
if (start_scsi(acb, dcb, srb)) { /* Should only happen, if sb. else grabs the bus */
3709
dprintkl(KERN_DEBUG,
3710
"request_sense: (0x%p) failed <%02i-%i>\n",
3711
srb->cmd, dcb->target_id, dcb->target_lun);
3712
srb_going_to_waiting_move(dcb, srb);
3713
waiting_set_timer(acb, HZ / 100);
3719
* device_alloc - Allocate a new device instance. This create the
3720
* devices instance and sets up all the data items. The adapter
3721
* instance is required to obtain confiuration information for this
3722
* device. This does *not* add this device to the adapters device
3725
* @acb: The adapter to obtain configuration information from.
3726
* @target: The target for the new device.
3727
* @lun: The lun for the new device.
3729
* Return the new device if successful or NULL on failure.
3731
static struct DeviceCtlBlk *device_alloc(struct AdapterCtlBlk *acb,
3734
struct NvRamType *eeprom = &acb->eeprom;
3735
u8 period_index = eeprom->target[target].period & 0x07;
3736
struct DeviceCtlBlk *dcb;
3738
dcb = kmalloc(sizeof(struct DeviceCtlBlk), GFP_ATOMIC);
3739
dprintkdbg(DBG_0, "device_alloc: <%02i-%i>\n", target, lun);
3743
INIT_LIST_HEAD(&dcb->srb_going_list);
3744
INIT_LIST_HEAD(&dcb->srb_waiting_list);
3745
dcb->active_srb = NULL;
3747
dcb->max_command = 1;
3748
dcb->target_id = target;
3749
dcb->target_lun = lun;
3750
#ifndef DC395x_NO_DISCONNECT
3752
IDENTIFY(dcb->dev_mode & NTC_DO_DISCONNECT, lun);
3754
dcb->identify_msg = IDENTIFY(0, lun);
3756
dcb->dev_mode = eeprom->target[target].cfg0;
3759
dcb->min_nego_period = clock_period[period_index];
3760
dcb->sync_period = 0;
3761
dcb->sync_offset = 0;
3764
#ifndef DC395x_NO_WIDE
3765
if ((dcb->dev_mode & NTC_DO_WIDE_NEGO)
3766
&& (acb->config & HCC_WIDE_CARD))
3767
dcb->sync_mode |= WIDE_NEGO_ENABLE;
3769
#ifndef DC395x_NO_SYNC
3770
if (dcb->dev_mode & NTC_DO_SYNC_NEGO)
3771
if (!(lun) || current_sync_offset)
3772
dcb->sync_mode |= SYNC_NEGO_ENABLE;
3774
if (dcb->target_lun != 0) {
3776
struct DeviceCtlBlk *p;
3777
list_for_each_entry(p, &acb->dcb_list, list)
3778
if (p->target_id == dcb->target_id)
3781
"device_alloc: <%02i-%i> copy from <%02i-%i>\n",
3782
dcb->target_id, dcb->target_lun,
3783
p->target_id, p->target_lun);
3784
dcb->sync_mode = p->sync_mode;
3785
dcb->sync_period = p->sync_period;
3786
dcb->min_nego_period = p->min_nego_period;
3787
dcb->sync_offset = p->sync_offset;
3788
dcb->inquiry7 = p->inquiry7;
3795
* adapter_add_device - Adds the device instance to the adaptor instance.
3797
* @acb: The adapter device to be updated
3798
* @dcb: A newly created and initialised device instance to add.
3800
static void adapter_add_device(struct AdapterCtlBlk *acb,
3801
struct DeviceCtlBlk *dcb)
3803
/* backpointer to adapter */
3806
/* set run_robin to this device if it is currently empty */
3807
if (list_empty(&acb->dcb_list))
3808
acb->dcb_run_robin = dcb;
3810
/* add device to list */
3811
list_add_tail(&dcb->list, &acb->dcb_list);
3813
/* update device maps */
3814
acb->dcb_map[dcb->target_id] |= (1 << dcb->target_lun);
3815
acb->children[dcb->target_id][dcb->target_lun] = dcb;
3820
* adapter_remove_device - Removes the device instance from the adaptor
3821
* instance. The device instance is not check in any way or freed by this.
3822
* The caller is expected to take care of that. This will simply remove the
3823
* device from the adapters data strcutures.
3825
* @acb: The adapter device to be updated
3826
* @dcb: A device that has previously been added to the adapter.
3828
static void adapter_remove_device(struct AdapterCtlBlk *acb,
3829
struct DeviceCtlBlk *dcb)
3831
struct DeviceCtlBlk *i;
3832
struct DeviceCtlBlk *tmp;
3833
dprintkdbg(DBG_0, "adapter_remove_device: <%02i-%i>\n",
3834
dcb->target_id, dcb->target_lun);
3836
/* fix up any pointers to this device that we have in the adapter */
3837
if (acb->active_dcb == dcb)
3838
acb->active_dcb = NULL;
3839
if (acb->dcb_run_robin == dcb)
3840
acb->dcb_run_robin = dcb_get_next(&acb->dcb_list, dcb);
3842
/* unlink from list */
3843
list_for_each_entry_safe(i, tmp, &acb->dcb_list, list)
3849
/* clear map and children */
3850
acb->dcb_map[dcb->target_id] &= ~(1 << dcb->target_lun);
3851
acb->children[dcb->target_id][dcb->target_lun] = NULL;
3857
* adapter_remove_and_free_device - Removes a single device from the adapter
3858
* and then frees the device information.
3860
* @acb: The adapter device to be updated
3861
* @dcb: A device that has previously been added to the adapter.
3863
static void adapter_remove_and_free_device(struct AdapterCtlBlk *acb,
3864
struct DeviceCtlBlk *dcb)
3866
if (list_size(&dcb->srb_going_list) > 1) {
3867
dprintkdbg(DBG_1, "adapter_remove_and_free_device: <%02i-%i> "
3868
"Won't remove because of %i active requests.\n",
3869
dcb->target_id, dcb->target_lun,
3870
list_size(&dcb->srb_going_list));
3873
adapter_remove_device(acb, dcb);
3879
* adapter_remove_and_free_all_devices - Removes and frees all of the
3880
* devices associated with the specified adapter.
3882
* @acb: The adapter from which all devices should be removed.
3884
static void adapter_remove_and_free_all_devices(struct AdapterCtlBlk* acb)
3886
struct DeviceCtlBlk *dcb;
3887
struct DeviceCtlBlk *tmp;
3888
dprintkdbg(DBG_1, "adapter_remove_and_free_all_devices: num=%i\n",
3889
list_size(&acb->dcb_list));
3891
list_for_each_entry_safe(dcb, tmp, &acb->dcb_list, list)
3892
adapter_remove_and_free_device(acb, dcb);
3897
* dc395x_slave_alloc - Called by the scsi mid layer to tell us about a new
3898
* scsi device that we need to deal with. We allocate a new device and then
3899
* insert that device into the adapters device list.
3901
* @scsi_device: The new scsi device that we need to handle.
3903
static int dc395x_slave_alloc(struct scsi_device *scsi_device)
3905
struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata;
3906
struct DeviceCtlBlk *dcb;
3908
dcb = device_alloc(acb, scsi_device->id, scsi_device->lun);
3911
adapter_add_device(acb, dcb);
3918
* dc395x_slave_destroy - Called by the scsi mid layer to tell us about a
3919
* device that is going away.
3921
* @scsi_device: The new scsi device that we need to handle.
3923
static void dc395x_slave_destroy(struct scsi_device *scsi_device)
3925
struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata;
3926
struct DeviceCtlBlk *dcb = find_dcb(acb, scsi_device->id, scsi_device->lun);
3928
adapter_remove_and_free_device(acb, dcb);
3935
* trms1040_wait_30us: wait for 30 us
3937
* Waits for 30us (using the chip by the looks of it..)
3939
* @io_port: base I/O address
3941
static void __devinit trms1040_wait_30us(unsigned long io_port)
3943
/* ScsiPortStallExecution(30); wait 30 us */
3944
outb(5, io_port + TRM_S1040_GEN_TIMER);
3945
while (!(inb(io_port + TRM_S1040_GEN_STATUS) & GTIMEOUT))
3951
* trms1040_write_cmd - write the secified command and address to
3954
* @io_port: base I/O address
3955
* @cmd: SB + op code (command) to send
3956
* @addr: address to send
3958
static void __devinit trms1040_write_cmd(unsigned long io_port, u8 cmd, u8 addr)
3963
/* program SB + OP code */
3964
for (i = 0; i < 3; i++, cmd <<= 1) {
3965
send_data = NVR_SELECT;
3966
if (cmd & 0x04) /* Start from bit 2 */
3967
send_data |= NVR_BITOUT;
3969
outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
3970
trms1040_wait_30us(io_port);
3971
outb((send_data | NVR_CLOCK),
3972
io_port + TRM_S1040_GEN_NVRAM);
3973
trms1040_wait_30us(io_port);
3977
for (i = 0; i < 7; i++, addr <<= 1) {
3978
send_data = NVR_SELECT;
3979
if (addr & 0x40) /* Start from bit 6 */
3980
send_data |= NVR_BITOUT;
3982
outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
3983
trms1040_wait_30us(io_port);
3984
outb((send_data | NVR_CLOCK),
3985
io_port + TRM_S1040_GEN_NVRAM);
3986
trms1040_wait_30us(io_port);
3988
outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
3989
trms1040_wait_30us(io_port);
3994
* trms1040_set_data - store a single byte in the eeprom
3996
* Called from write all to write a single byte into the SSEEPROM
3997
* Which is done one bit at a time.
3999
* @io_port: base I/O address
4000
* @addr: offset into EEPROM
4001
* @byte: bytes to write
4003
static void __devinit trms1040_set_data(unsigned long io_port, u8 addr, u8 byte)
4008
/* Send write command & address */
4009
trms1040_write_cmd(io_port, 0x05, addr);
4012
for (i = 0; i < 8; i++, byte <<= 1) {
4013
send_data = NVR_SELECT;
4014
if (byte & 0x80) /* Start from bit 7 */
4015
send_data |= NVR_BITOUT;
4017
outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
4018
trms1040_wait_30us(io_port);
4019
outb((send_data | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
4020
trms1040_wait_30us(io_port);
4022
outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
4023
trms1040_wait_30us(io_port);
4025
/* Disable chip select */
4026
outb(0, io_port + TRM_S1040_GEN_NVRAM);
4027
trms1040_wait_30us(io_port);
4029
outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
4030
trms1040_wait_30us(io_port);
4032
/* Wait for write ready */
4034
outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
4035
trms1040_wait_30us(io_port);
4037
outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
4038
trms1040_wait_30us(io_port);
4040
if (inb(io_port + TRM_S1040_GEN_NVRAM) & NVR_BITIN)
4044
/* Disable chip select */
4045
outb(0, io_port + TRM_S1040_GEN_NVRAM);
4050
* trms1040_write_all - write 128 bytes to the eeprom
4052
* Write the supplied 128 bytes to the chips SEEPROM
4054
* @eeprom: the data to write
4055
* @io_port: the base io port
4057
static void __devinit trms1040_write_all(struct NvRamType *eeprom, unsigned long io_port)
4059
u8 *b_eeprom = (u8 *)eeprom;
4062
/* Enable SEEPROM */
4063
outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM),
4064
io_port + TRM_S1040_GEN_CONTROL);
4067
trms1040_write_cmd(io_port, 0x04, 0xFF);
4068
outb(0, io_port + TRM_S1040_GEN_NVRAM);
4069
trms1040_wait_30us(io_port);
4072
for (addr = 0; addr < 128; addr++, b_eeprom++)
4073
trms1040_set_data(io_port, addr, *b_eeprom);
4076
trms1040_write_cmd(io_port, 0x04, 0x00);
4077
outb(0, io_port + TRM_S1040_GEN_NVRAM);
4078
trms1040_wait_30us(io_port);
4080
/* Disable SEEPROM */
4081
outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM),
4082
io_port + TRM_S1040_GEN_CONTROL);
4087
* trms1040_get_data - get a single byte from the eeprom
4089
* Called from read all to read a single byte into the SSEEPROM
4090
* Which is done one bit at a time.
4092
* @io_port: base I/O address
4093
* @addr: offset into SEEPROM
4095
* Returns the byte read.
4097
static u8 __devinit trms1040_get_data(unsigned long io_port, u8 addr)
4103
/* Send read command & address */
4104
trms1040_write_cmd(io_port, 0x06, addr);
4107
for (i = 0; i < 8; i++) {
4108
outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
4109
trms1040_wait_30us(io_port);
4110
outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
4112
/* Get data bit while falling edge */
4113
read_byte = inb(io_port + TRM_S1040_GEN_NVRAM);
4115
if (read_byte & NVR_BITIN)
4118
trms1040_wait_30us(io_port);
4121
/* Disable chip select */
4122
outb(0, io_port + TRM_S1040_GEN_NVRAM);
4128
* trms1040_read_all - read all bytes from the eeprom
4130
* Read the 128 bytes from the SEEPROM.
4132
* @eeprom: where to store the data
4133
* @io_port: the base io port
4135
static void __devinit trms1040_read_all(struct NvRamType *eeprom, unsigned long io_port)
4137
u8 *b_eeprom = (u8 *)eeprom;
4140
/* Enable SEEPROM */
4141
outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM),
4142
io_port + TRM_S1040_GEN_CONTROL);
4145
for (addr = 0; addr < 128; addr++, b_eeprom++)
4146
*b_eeprom = trms1040_get_data(io_port, addr);
4148
/* Disable SEEPROM */
4149
outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM),
4150
io_port + TRM_S1040_GEN_CONTROL);
4156
* check_eeprom - get and check contents of the eeprom
4158
* Read seeprom 128 bytes into the memory provider in eeprom.
4159
* Checks the checksum and if it's not correct it uses a set of default
4162
* @eeprom: caller allocated strcuture to read the eeprom data into
4163
* @io_port: io port to read from
4165
static void __devinit check_eeprom(struct NvRamType *eeprom, unsigned long io_port)
4167
u16 *w_eeprom = (u16 *)eeprom;
4173
trms1040_read_all(eeprom, io_port); /* read eeprom */
4176
for (w_addr = 0, w_eeprom = (u16 *)eeprom; w_addr < 64;
4177
w_addr++, w_eeprom++)
4179
if (cksum != 0x1234) {
4181
* Checksum is wrong.
4182
* Load a set of defaults into the eeprom buffer
4184
dprintkl(KERN_WARNING,
4185
"EEProm checksum error: using default values and options.\n");
4186
eeprom->sub_vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM;
4187
eeprom->sub_vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8);
4188
eeprom->sub_sys_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040;
4189
eeprom->sub_sys_id[1] =
4190
(u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8);
4191
eeprom->sub_class = 0x00;
4192
eeprom->vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM;
4193
eeprom->vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8);
4194
eeprom->device_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040;
4195
eeprom->device_id[1] =
4196
(u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8);
4197
eeprom->reserved = 0x00;
4199
for (d_addr = 0, d_eeprom = (u32 *)eeprom->target;
4200
d_addr < 16; d_addr++, d_eeprom++)
4201
*d_eeprom = 0x00000077; /* cfg3,cfg2,period,cfg0 */
4203
*d_eeprom++ = 0x04000F07; /* max_tag,delay_time,channel_cfg,scsi_id */
4204
*d_eeprom++ = 0x00000015; /* reserved1,boot_lun,boot_target,reserved0 */
4205
for (d_addr = 0; d_addr < 12; d_addr++, d_eeprom++)
4208
/* Now load defaults (maybe set by boot/module params) */
4209
set_safe_settings();
4211
eeprom_override(eeprom);
4213
eeprom->cksum = 0x00;
4214
for (w_addr = 0, cksum = 0, w_eeprom = (u16 *)eeprom;
4215
w_addr < 63; w_addr++, w_eeprom++)
4218
*w_eeprom = 0x1234 - cksum;
4219
trms1040_write_all(eeprom, io_port);
4220
eeprom->delay_time = cfg_data[CFG_RESET_DELAY].value;
4222
set_safe_settings();
4223
eeprom_index_to_delay(eeprom);
4224
eeprom_override(eeprom);
4230
* print_eeprom_settings - output the eeprom settings
4231
* to the kernel log so people can see what they were.
4233
* @eeprom: The eeprom data strucutre to show details for.
4235
static void __devinit print_eeprom_settings(struct NvRamType *eeprom)
4237
dprintkl(KERN_INFO, "Used settings: AdapterID=%02i, Speed=%i(%02i.%01iMHz), dev_mode=0x%02x\n",
4239
eeprom->target[0].period,
4240
clock_speed[eeprom->target[0].period] / 10,
4241
clock_speed[eeprom->target[0].period] % 10,
4242
eeprom->target[0].cfg0);
4243
dprintkl(KERN_INFO, " AdaptMode=0x%02x, Tags=%i(%02i), DelayReset=%is\n",
4244
eeprom->channel_cfg, eeprom->max_tag,
4245
1 << eeprom->max_tag, eeprom->delay_time);
4249
/* Free SG tables */
4250
static void adapter_sg_tables_free(struct AdapterCtlBlk *acb)
4253
const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN;
4255
for (i = 0; i < DC395x_MAX_SRB_CNT; i += srbs_per_page)
4256
kfree(acb->srb_array[i].segment_x);
4261
* Allocate SG tables; as we have to pci_map them, an SG list (struct SGentry*)
4262
* should never cross a page boundary */
4263
static int __devinit adapter_sg_tables_alloc(struct AdapterCtlBlk *acb)
4265
const unsigned mem_needed = (DC395x_MAX_SRB_CNT+1)
4267
int pages = (mem_needed+(PAGE_SIZE-1))/PAGE_SIZE;
4268
const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN;
4271
struct SGentry *uninitialized_var(ptr);
4273
for (i = 0; i < DC395x_MAX_SRB_CNT; i++)
4274
acb->srb_array[i].segment_x = NULL;
4276
dprintkdbg(DBG_1, "Allocate %i pages for SG tables\n", pages);
4278
ptr = kmalloc(PAGE_SIZE, GFP_KERNEL);
4280
adapter_sg_tables_free(acb);
4283
dprintkdbg(DBG_1, "Allocate %li bytes at %p for SG segments %i\n",
4284
PAGE_SIZE, ptr, srb_idx);
4286
while (i < srbs_per_page && srb_idx < DC395x_MAX_SRB_CNT)
4287
acb->srb_array[srb_idx++].segment_x =
4288
ptr + (i++ * DC395x_MAX_SG_LISTENTRY);
4290
if (i < srbs_per_page)
4291
acb->srb.segment_x =
4292
ptr + (i * DC395x_MAX_SG_LISTENTRY);
4294
dprintkl(KERN_DEBUG, "No space for tmsrb SG table reserved?!\n");
4301
* adapter_print_config - print adapter connection and termination
4304
* The io port in the adapter needs to have been set before calling
4307
* @acb: The adapter to print the information for.
4309
static void __devinit adapter_print_config(struct AdapterCtlBlk *acb)
4313
bval = DC395x_read8(acb, TRM_S1040_GEN_STATUS);
4314
dprintkl(KERN_INFO, "%sConnectors: ",
4315
((bval & WIDESCSI) ? "(Wide) " : ""));
4316
if (!(bval & CON5068))
4317
printk("ext%s ", !(bval & EXT68HIGH) ? "68" : "50");
4318
if (!(bval & CON68))
4319
printk("int68%s ", !(bval & INT68HIGH) ? "" : "(50)");
4320
if (!(bval & CON50))
4322
if ((bval & (CON5068 | CON50 | CON68)) ==
4323
0 /*(CON5068 | CON50 | CON68) */ )
4324
printk(" Oops! (All 3?) ");
4325
bval = DC395x_read8(acb, TRM_S1040_GEN_CONTROL);
4326
printk(" Termination: ");
4327
if (bval & DIS_TERM)
4328
printk("Disabled\n");
4330
if (bval & AUTOTERM)
4332
if (bval & LOW8TERM)
4342
* adapter_init_params - Initialize the various parameters in the
4343
* adapter structure. Note that the pointer to the scsi_host is set
4344
* early (when this instance is created) and the io_port and irq
4345
* values are set later after they have been reserved. This just gets
4346
* everything set to a good starting position.
4348
* The eeprom structure in the adapter needs to have been set before
4349
* calling this function.
4351
* @acb: The adapter to initialize.
4353
static void __devinit adapter_init_params(struct AdapterCtlBlk *acb)
4355
struct NvRamType *eeprom = &acb->eeprom;
4358
/* NOTE: acb->scsi_host is set at scsi_host/acb creation time */
4359
/* NOTE: acb->io_port_base is set at port registration time */
4360
/* NOTE: acb->io_port_len is set at port registration time */
4362
INIT_LIST_HEAD(&acb->dcb_list);
4363
acb->dcb_run_robin = NULL;
4364
acb->active_dcb = NULL;
4366
INIT_LIST_HEAD(&acb->srb_free_list);
4367
/* temp SRB for Q tag used or abort command used */
4368
acb->tmp_srb = &acb->srb;
4369
init_timer(&acb->waiting_timer);
4370
init_timer(&acb->selto_timer);
4372
acb->srb_count = DC395x_MAX_SRB_CNT;
4374
acb->sel_timeout = DC395x_SEL_TIMEOUT; /* timeout=250ms */
4375
/* NOTE: acb->irq_level is set at IRQ registration time */
4377
acb->tag_max_num = 1 << eeprom->max_tag;
4378
if (acb->tag_max_num > 30)
4379
acb->tag_max_num = 30;
4381
acb->acb_flag = 0; /* RESET_DETECT, RESET_DONE, RESET_DEV */
4382
acb->gmode2 = eeprom->channel_cfg;
4383
acb->config = 0; /* NOTE: actually set in adapter_init_chip */
4385
if (eeprom->channel_cfg & NAC_SCANLUN)
4387
acb->scan_devices = 1;
4389
acb->scsi_host->this_id = eeprom->scsi_id;
4390
acb->hostid_bit = (1 << acb->scsi_host->this_id);
4392
for (i = 0; i < DC395x_MAX_SCSI_ID; i++)
4393
acb->dcb_map[i] = 0;
4397
/* link static array of srbs into the srb free list */
4398
for (i = 0; i < acb->srb_count - 1; i++)
4399
srb_free_insert(acb, &acb->srb_array[i]);
4404
* adapter_init_host - Initialize the scsi host instance based on
4405
* values that we have already stored in the adapter instance. There's
4406
* some mention that a lot of these are deprecated, so we won't use
4407
* them (we'll use the ones in the adapter instance) but we'll fill
4408
* them in in case something else needs them.
4410
* The eeprom structure, irq and io ports in the adapter need to have
4411
* been set before calling this function.
4413
* @host: The scsi host instance to fill in the values for.
4415
static void __devinit adapter_init_scsi_host(struct Scsi_Host *host)
4417
struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata;
4418
struct NvRamType *eeprom = &acb->eeprom;
4420
host->max_cmd_len = 24;
4421
host->can_queue = DC395x_MAX_CMD_QUEUE;
4422
host->cmd_per_lun = DC395x_MAX_CMD_PER_LUN;
4423
host->this_id = (int)eeprom->scsi_id;
4424
host->io_port = acb->io_port_base;
4425
host->n_io_port = acb->io_port_len;
4426
host->dma_channel = -1;
4427
host->unique_id = acb->io_port_base;
4428
host->irq = acb->irq_level;
4429
host->last_reset = jiffies;
4432
if (host->max_id - 1 == eeprom->scsi_id)
4435
#ifdef CONFIG_SCSI_MULTI_LUN
4436
if (eeprom->channel_cfg & NAC_SCANLUN)
4448
* adapter_init_chip - Get the chip into a know state and figure out
4449
* some of the settings that apply to this adapter.
4451
* The io port in the adapter needs to have been set before calling
4452
* this function. The config will be configured correctly on return.
4454
* @acb: The adapter which we are to init.
4456
static void __devinit adapter_init_chip(struct AdapterCtlBlk *acb)
4458
struct NvRamType *eeprom = &acb->eeprom;
4460
/* Mask all the interrupt */
4461
DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00);
4462
DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00);
4464
/* Reset SCSI module */
4465
DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
4467
/* Reset PCI/DMA module */
4468
DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
4471
/* program configuration 0 */
4472
acb->config = HCC_AUTOTERM | HCC_PARITY;
4473
if (DC395x_read8(acb, TRM_S1040_GEN_STATUS) & WIDESCSI)
4474
acb->config |= HCC_WIDE_CARD;
4476
if (eeprom->channel_cfg & NAC_POWERON_SCSI_RESET)
4477
acb->config |= HCC_SCSI_RESET;
4479
if (acb->config & HCC_SCSI_RESET) {
4480
dprintkl(KERN_INFO, "Performing initial SCSI bus reset\n");
4481
DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI);
4483
/*while (!( DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET )); */
4484
/*spin_unlock_irq (&io_request_lock); */
4487
acb->scsi_host->last_reset =
4489
HZ * acb->eeprom.delay_time;
4491
/*spin_lock_irq (&io_request_lock); */
4497
* init_adapter - Grab the resource for the card, setup the adapter
4498
* information, set the card into a known state, create the various
4499
* tables etc etc. This basically gets all adapter information all up
4500
* to date, initialised and gets the chip in sync with it.
4502
* @host: This hosts adapter structure
4503
* @io_port: The base I/O port
4506
* Returns 0 if the initialization succeeds, any other value on
4509
static int __devinit adapter_init(struct AdapterCtlBlk *acb,
4510
unsigned long io_port, u32 io_port_len, unsigned int irq)
4512
if (!request_region(io_port, io_port_len, DC395X_NAME)) {
4513
dprintkl(KERN_ERR, "Failed to reserve IO region 0x%lx\n", io_port);
4516
/* store port base to indicate we have registered it */
4517
acb->io_port_base = io_port;
4518
acb->io_port_len = io_port_len;
4520
if (request_irq(irq, dc395x_interrupt, IRQF_SHARED, DC395X_NAME, acb)) {
4521
/* release the region we just claimed */
4522
dprintkl(KERN_INFO, "Failed to register IRQ\n");
4525
/* store irq to indicate we have registered it */
4526
acb->irq_level = irq;
4528
/* get eeprom configuration information and command line settings etc */
4529
check_eeprom(&acb->eeprom, io_port);
4530
print_eeprom_settings(&acb->eeprom);
4532
/* setup adapter control block */
4533
adapter_init_params(acb);
4535
/* display card connectors/termination settings */
4536
adapter_print_config(acb);
4538
if (adapter_sg_tables_alloc(acb)) {
4539
dprintkl(KERN_DEBUG, "Memory allocation for SG tables failed\n");
4542
adapter_init_scsi_host(acb->scsi_host);
4543
adapter_init_chip(acb);
4544
set_basic_config(acb);
4547
"adapter_init: acb=%p, pdcb_map=%p psrb_array=%p "
4548
"size{acb=0x%04x dcb=0x%04x srb=0x%04x}\n",
4549
acb, acb->dcb_map, acb->srb_array, sizeof(struct AdapterCtlBlk),
4550
sizeof(struct DeviceCtlBlk), sizeof(struct ScsiReqBlk));
4555
free_irq(acb->irq_level, acb);
4556
if (acb->io_port_base)
4557
release_region(acb->io_port_base, acb->io_port_len);
4558
adapter_sg_tables_free(acb);
4565
* adapter_uninit_chip - cleanly shut down the scsi controller chip,
4566
* stopping all operations and disabling interrupt generation on the
4569
* @acb: The adapter which we are to shutdown.
4571
static void adapter_uninit_chip(struct AdapterCtlBlk *acb)
4573
/* disable interrupts */
4574
DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0);
4575
DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0);
4577
/* reset the scsi bus */
4578
if (acb->config & HCC_SCSI_RESET)
4579
reset_scsi_bus(acb);
4581
/* clear any pending interrupt state */
4582
DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
4588
* adapter_uninit - Shut down the chip and release any resources that
4589
* we had allocated. Once this returns the adapter should not be used
4592
* @acb: The adapter which we are to un-initialize.
4594
static void adapter_uninit(struct AdapterCtlBlk *acb)
4596
unsigned long flags;
4597
DC395x_LOCK_IO(acb->scsi_host, flags);
4600
if (timer_pending(&acb->waiting_timer))
4601
del_timer(&acb->waiting_timer);
4602
if (timer_pending(&acb->selto_timer))
4603
del_timer(&acb->selto_timer);
4605
adapter_uninit_chip(acb);
4606
adapter_remove_and_free_all_devices(acb);
4607
DC395x_UNLOCK_IO(acb->scsi_host, flags);
4610
free_irq(acb->irq_level, acb);
4611
if (acb->io_port_base)
4612
release_region(acb->io_port_base, acb->io_port_len);
4614
adapter_sg_tables_free(acb);
4619
#define SPRINTF(args...) pos += sprintf(pos, args)
4623
if (YN) SPRINTF(" Yes ");\
4624
else SPRINTF(" No ")
4626
static int dc395x_proc_info(struct Scsi_Host *host, char *buffer,
4627
char **start, off_t offset, int length, int inout)
4629
struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata;
4632
struct DeviceCtlBlk *dcb;
4633
unsigned long flags;
4636
if (inout) /* Has data been written to the file ? */
4639
SPRINTF(DC395X_BANNER " PCI SCSI Host Adapter\n");
4640
SPRINTF(" Driver Version " DC395X_VERSION "\n");
4642
DC395x_LOCK_IO(acb->scsi_host, flags);
4644
SPRINTF("SCSI Host Nr %i, ", host->host_no);
4645
SPRINTF("DC395U/UW/F DC315/U %s\n",
4646
(acb->config & HCC_WIDE_CARD) ? "Wide" : "");
4647
SPRINTF("io_port_base 0x%04lx, ", acb->io_port_base);
4648
SPRINTF("irq_level 0x%04x, ", acb->irq_level);
4649
SPRINTF(" SelTimeout %ims\n", (1638 * acb->sel_timeout) / 1000);
4651
SPRINTF("MaxID %i, MaxLUN %i, ", host->max_id, host->max_lun);
4652
SPRINTF("AdapterID %i\n", host->this_id);
4654
SPRINTF("tag_max_num %i", acb->tag_max_num);
4655
/*SPRINTF(", DMA_Status %i\n", DC395x_read8(acb, TRM_S1040_DMA_STATUS)); */
4656
SPRINTF(", FilterCfg 0x%02x",
4657
DC395x_read8(acb, TRM_S1040_SCSI_CONFIG1));
4658
SPRINTF(", DelayReset %is\n", acb->eeprom.delay_time);
4661
SPRINTF("Nr of DCBs: %i\n", list_size(&acb->dcb_list));
4663
("Map of attached LUNs: %02x %02x %02x %02x %02x %02x %02x %02x\n",
4664
acb->dcb_map[0], acb->dcb_map[1], acb->dcb_map[2],
4665
acb->dcb_map[3], acb->dcb_map[4], acb->dcb_map[5],
4666
acb->dcb_map[6], acb->dcb_map[7]);
4668
(" %02x %02x %02x %02x %02x %02x %02x %02x\n",
4669
acb->dcb_map[8], acb->dcb_map[9], acb->dcb_map[10],
4670
acb->dcb_map[11], acb->dcb_map[12], acb->dcb_map[13],
4671
acb->dcb_map[14], acb->dcb_map[15]);
4674
("Un ID LUN Prty Sync Wide DsCn SndS TagQ nego_period SyncFreq SyncOffs MaxCmd\n");
4677
list_for_each_entry(dcb, &acb->dcb_list, list) {
4679
SPRINTF("%02i %02i %02i ", dev, dcb->target_id,
4681
YESNO(dcb->dev_mode & NTC_DO_PARITY_CHK);
4682
YESNO(dcb->sync_offset);
4683
YESNO(dcb->sync_period & WIDE_SYNC);
4684
YESNO(dcb->dev_mode & NTC_DO_DISCONNECT);
4685
YESNO(dcb->dev_mode & NTC_DO_SEND_START);
4686
YESNO(dcb->sync_mode & EN_TAG_QUEUEING);
4687
nego_period = clock_period[dcb->sync_period & 0x07] << 2;
4688
if (dcb->sync_offset)
4689
SPRINTF(" %03i ns ", nego_period);
4691
SPRINTF(" (%03i ns)", (dcb->min_nego_period << 2));
4693
if (dcb->sync_offset & 0x0f) {
4694
spd = 1000 / (nego_period);
4695
spd1 = 1000 % (nego_period);
4696
spd1 = (spd1 * 10 + nego_period / 2) / (nego_period);
4697
SPRINTF(" %2i.%1i M %02i ", spd, spd1,
4698
(dcb->sync_offset & 0x0f));
4702
/* Add more info ... */
4703
SPRINTF(" %02i\n", dcb->max_command);
4707
if (timer_pending(&acb->waiting_timer))
4708
SPRINTF("Waiting queue timer running\n");
4712
list_for_each_entry(dcb, &acb->dcb_list, list) {
4713
struct ScsiReqBlk *srb;
4714
if (!list_empty(&dcb->srb_waiting_list))
4715
SPRINTF("DCB (%02i-%i): Waiting: %i:",
4716
dcb->target_id, dcb->target_lun,
4717
list_size(&dcb->srb_waiting_list));
4718
list_for_each_entry(srb, &dcb->srb_waiting_list, list)
4719
SPRINTF(" %p", srb->cmd);
4720
if (!list_empty(&dcb->srb_going_list))
4721
SPRINTF("\nDCB (%02i-%i): Going : %i:",
4722
dcb->target_id, dcb->target_lun,
4723
list_size(&dcb->srb_going_list));
4724
list_for_each_entry(srb, &dcb->srb_going_list, list)
4725
SPRINTF(" %p", srb->cmd);
4726
if (!list_empty(&dcb->srb_waiting_list) || !list_empty(&dcb->srb_going_list))
4730
if (debug_enabled(DBG_1)) {
4731
SPRINTF("DCB list for ACB %p:\n", acb);
4732
list_for_each_entry(dcb, &acb->dcb_list, list) {
4733
SPRINTF("%p -> ", dcb);
4738
*start = buffer + offset;
4739
DC395x_UNLOCK_IO(acb->scsi_host, flags);
4741
if (pos - buffer < offset)
4743
else if (pos - buffer - offset < length)
4744
return pos - buffer - offset;
4750
static struct scsi_host_template dc395x_driver_template = {
4751
.module = THIS_MODULE,
4752
.proc_name = DC395X_NAME,
4753
.proc_info = dc395x_proc_info,
4754
.name = DC395X_BANNER " " DC395X_VERSION,
4755
.queuecommand = dc395x_queue_command,
4756
.bios_param = dc395x_bios_param,
4757
.slave_alloc = dc395x_slave_alloc,
4758
.slave_destroy = dc395x_slave_destroy,
4759
.can_queue = DC395x_MAX_CAN_QUEUE,
4761
.sg_tablesize = DC395x_MAX_SG_TABLESIZE,
4762
.cmd_per_lun = DC395x_MAX_CMD_PER_LUN,
4763
.eh_abort_handler = dc395x_eh_abort,
4764
.eh_bus_reset_handler = dc395x_eh_bus_reset,
4765
.use_clustering = DISABLE_CLUSTERING,
4770
* banner_display - Display banner on first instance of driver
4773
static void banner_display(void)
4775
static int banner_done = 0;
4778
dprintkl(KERN_INFO, "%s %s\n", DC395X_BANNER, DC395X_VERSION);
4785
* dc395x_init_one - Initialise a single instance of the adapter.
4787
* The PCI layer will call this once for each instance of the adapter
4788
* that it finds in the system. The pci_dev strcuture indicates which
4789
* instance we are being called from.
4791
* @dev: The PCI device to initialize.
4792
* @id: Looks like a pointer to the entry in our pci device table
4793
* that was actually matched by the PCI subsystem.
4795
* Returns 0 on success, or an error code (-ve) on failure.
4797
static int __devinit dc395x_init_one(struct pci_dev *dev,
4798
const struct pci_device_id *id)
4800
struct Scsi_Host *scsi_host = NULL;
4801
struct AdapterCtlBlk *acb = NULL;
4802
unsigned long io_port_base;
4803
unsigned int io_port_len;
4806
dprintkdbg(DBG_0, "Init one instance (%s)\n", pci_name(dev));
4809
if (pci_enable_device(dev))
4811
dprintkl(KERN_INFO, "PCI Enable device failed.\n");
4814
io_port_base = pci_resource_start(dev, 0) & PCI_BASE_ADDRESS_IO_MASK;
4815
io_port_len = pci_resource_len(dev, 0);
4817
dprintkdbg(DBG_0, "IO_PORT=0x%04lx, IRQ=0x%x\n", io_port_base, dev->irq);
4819
/* allocate scsi host information (includes out adapter) */
4820
scsi_host = scsi_host_alloc(&dc395x_driver_template,
4821
sizeof(struct AdapterCtlBlk));
4823
dprintkl(KERN_INFO, "scsi_host_alloc failed\n");
4826
acb = (struct AdapterCtlBlk*)scsi_host->hostdata;
4827
acb->scsi_host = scsi_host;
4830
/* initialise the adapter and everything we need */
4831
if (adapter_init(acb, io_port_base, io_port_len, irq)) {
4832
dprintkl(KERN_INFO, "adapter init failed\n");
4836
pci_set_master(dev);
4838
/* get the scsi mid level to scan for new devices on the bus */
4839
if (scsi_add_host(scsi_host, &dev->dev)) {
4840
dprintkl(KERN_ERR, "scsi_add_host failed\n");
4843
pci_set_drvdata(dev, scsi_host);
4844
scsi_scan_host(scsi_host);
4850
adapter_uninit(acb);
4851
if (scsi_host != NULL)
4852
scsi_host_put(scsi_host);
4853
pci_disable_device(dev);
4859
* dc395x_remove_one - Called to remove a single instance of the
4862
* @dev: The PCI device to initialize.
4864
static void __devexit dc395x_remove_one(struct pci_dev *dev)
4866
struct Scsi_Host *scsi_host = pci_get_drvdata(dev);
4867
struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)(scsi_host->hostdata);
4869
dprintkdbg(DBG_0, "dc395x_remove_one: acb=%p\n", acb);
4871
scsi_remove_host(scsi_host);
4872
adapter_uninit(acb);
4873
pci_disable_device(dev);
4874
scsi_host_put(scsi_host);
4875
pci_set_drvdata(dev, NULL);
4879
static struct pci_device_id dc395x_pci_table[] = {
4881
.vendor = PCI_VENDOR_ID_TEKRAM,
4882
.device = PCI_DEVICE_ID_TEKRAM_TRMS1040,
4883
.subvendor = PCI_ANY_ID,
4884
.subdevice = PCI_ANY_ID,
4886
{} /* Terminating entry */
4888
MODULE_DEVICE_TABLE(pci, dc395x_pci_table);
4891
static struct pci_driver dc395x_driver = {
4892
.name = DC395X_NAME,
4893
.id_table = dc395x_pci_table,
4894
.probe = dc395x_init_one,
4895
.remove = __devexit_p(dc395x_remove_one),
4900
* dc395x_module_init - Module initialization function
4902
* Used by both module and built-in driver to initialise this driver.
4904
static int __init dc395x_module_init(void)
4906
return pci_register_driver(&dc395x_driver);
4911
* dc395x_module_exit - Module cleanup function.
4913
static void __exit dc395x_module_exit(void)
4915
pci_unregister_driver(&dc395x_driver);
4919
module_init(dc395x_module_init);
4920
module_exit(dc395x_module_exit);
4922
MODULE_AUTHOR("C.L. Huang / Erich Chen / Kurt Garloff");
4923
MODULE_DESCRIPTION("SCSI host adapter driver for Tekram TRM-S1040 based adapters: Tekram DC395 and DC315 series");
4924
MODULE_LICENSE("GPL");