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
;
311 unsigned long last_reset
;
317 unsigned int irq_level
;
327 u8 dcb_map
[DC395x_MAX_SCSI_ID
];
328 struct DeviceCtlBlk
*children
[DC395x_MAX_SCSI_ID
][32];
334 struct ScsiReqBlk srb_array
[DC395x_MAX_SRB_CNT
];
335 struct ScsiReqBlk srb
;
337 struct NvRamType eeprom
; /* eeprom settings for this adapter */
341 /*---------------------------------------------------------------------------
343 ---------------------------------------------------------------------------*/
344 static void data_out_phase0(struct AdapterCtlBlk
*acb
, struct ScsiReqBlk
*srb
,
346 static void data_in_phase0(struct AdapterCtlBlk
*acb
, struct ScsiReqBlk
*srb
,
348 static void command_phase0(struct AdapterCtlBlk
*acb
, struct ScsiReqBlk
*srb
,
350 static void status_phase0(struct AdapterCtlBlk
*acb
, struct ScsiReqBlk
*srb
,
352 static void msgout_phase0(struct AdapterCtlBlk
*acb
, struct ScsiReqBlk
*srb
,
354 static void msgin_phase0(struct AdapterCtlBlk
*acb
, struct ScsiReqBlk
*srb
,
356 static void data_out_phase1(struct AdapterCtlBlk
*acb
, struct ScsiReqBlk
*srb
,
358 static void data_in_phase1(struct AdapterCtlBlk
*acb
, struct ScsiReqBlk
*srb
,
360 static void command_phase1(struct AdapterCtlBlk
*acb
, struct ScsiReqBlk
*srb
,
362 static void status_phase1(struct AdapterCtlBlk
*acb
, struct ScsiReqBlk
*srb
,
364 static void msgout_phase1(struct AdapterCtlBlk
*acb
, struct ScsiReqBlk
*srb
,
366 static void msgin_phase1(struct AdapterCtlBlk
*acb
, struct ScsiReqBlk
*srb
,
368 static void nop0(struct AdapterCtlBlk
*acb
, struct ScsiReqBlk
*srb
,
370 static void nop1(struct AdapterCtlBlk
*acb
, struct ScsiReqBlk
*srb
,
372 static void set_basic_config(struct AdapterCtlBlk
*acb
);
373 static void cleanup_after_transfer(struct AdapterCtlBlk
*acb
,
374 struct ScsiReqBlk
*srb
);
375 static void reset_scsi_bus(struct AdapterCtlBlk
*acb
);
376 static void data_io_transfer(struct AdapterCtlBlk
*acb
,
377 struct ScsiReqBlk
*srb
, u16 io_dir
);
378 static void disconnect(struct AdapterCtlBlk
*acb
);
379 static void reselect(struct AdapterCtlBlk
*acb
);
380 static u8
start_scsi(struct AdapterCtlBlk
*acb
, struct DeviceCtlBlk
*dcb
,
381 struct ScsiReqBlk
*srb
);
382 static inline void enable_msgout_abort(struct AdapterCtlBlk
*acb
,
383 struct ScsiReqBlk
*srb
);
384 static void build_srb(struct scsi_cmnd
*cmd
, struct DeviceCtlBlk
*dcb
,
385 struct ScsiReqBlk
*srb
);
386 static void doing_srb_done(struct AdapterCtlBlk
*acb
, u8 did_code
,
387 struct scsi_cmnd
*cmd
, u8 force
);
388 static void scsi_reset_detect(struct AdapterCtlBlk
*acb
);
389 static void pci_unmap_srb(struct AdapterCtlBlk
*acb
, struct ScsiReqBlk
*srb
);
390 static void pci_unmap_srb_sense(struct AdapterCtlBlk
*acb
,
391 struct ScsiReqBlk
*srb
);
392 static void srb_done(struct AdapterCtlBlk
*acb
, struct DeviceCtlBlk
*dcb
,
393 struct ScsiReqBlk
*srb
);
394 static void request_sense(struct AdapterCtlBlk
*acb
, struct DeviceCtlBlk
*dcb
,
395 struct ScsiReqBlk
*srb
);
396 static void set_xfer_rate(struct AdapterCtlBlk
*acb
,
397 struct DeviceCtlBlk
*dcb
);
398 static void waiting_timeout(unsigned long ptr
);
401 /*---------------------------------------------------------------------------
403 ---------------------------------------------------------------------------*/
404 static u16 current_sync_offset
= 0;
406 static void *dc395x_scsi_phase0
[] = {
407 data_out_phase0
,/* phase:0 */
408 data_in_phase0
, /* phase:1 */
409 command_phase0
, /* phase:2 */
410 status_phase0
, /* phase:3 */
411 nop0
, /* phase:4 PH_BUS_FREE .. initial phase */
412 nop0
, /* phase:5 PH_BUS_FREE .. initial phase */
413 msgout_phase0
, /* phase:6 */
414 msgin_phase0
, /* phase:7 */
417 static void *dc395x_scsi_phase1
[] = {
418 data_out_phase1
,/* phase:0 */
419 data_in_phase1
, /* phase:1 */
420 command_phase1
, /* phase:2 */
421 status_phase1
, /* phase:3 */
422 nop1
, /* phase:4 PH_BUS_FREE .. initial phase */
423 nop1
, /* phase:5 PH_BUS_FREE .. initial phase */
424 msgout_phase1
, /* phase:6 */
425 msgin_phase1
, /* phase:7 */
429 *Fast20: 000 50ns, 20.0 MHz
431 * 010 100ns, 10.0 MHz
438 *Fast40(LVDS): 000 25ns, 40.0 MHz
441 * 011 100ns, 10.0 MHz
447 /*static u8 clock_period[] = {12,19,25,31,37,44,50,62};*/
449 /* real period:48ns,76ns,100ns,124ns,148ns,176ns,200ns,248ns */
450 static u8 clock_period
[] = { 12, 18, 25, 31, 37, 43, 50, 62 };
451 static u16 clock_speed
[] = { 200, 133, 100, 80, 67, 58, 50, 40 };
454 /*---------------------------------------------------------------------------
456 ---------------------------------------------------------------------------*/
458 * Module/boot parameters currently effect *all* instances of the
459 * card in the system.
463 * Command line parameters are stored in a structure below.
464 * These are the index's into the structure for the various
465 * command line options.
467 #define CFG_ADAPTER_ID 0
468 #define CFG_MAX_SPEED 1
469 #define CFG_DEV_MODE 2
470 #define CFG_ADAPTER_MODE 3
472 #define CFG_RESET_DELAY 5
474 #define CFG_NUM 6 /* number of configuration items */
478 * Value used to indicate that a command line override
479 * hasn't been used to modify the value.
481 #define CFG_PARAM_UNSET -1
485 * Hold command line parameters.
487 struct ParameterData
{
488 int value
; /* value of this setting */
489 int min
; /* minimum value */
490 int max
; /* maximum value */
491 int def
; /* default value */
492 int safe
; /* safe value */
494 static struct ParameterData cfg_data
[] = {
513 NTC_DO_PARITY_CHK
| NTC_DO_DISCONNECT
| NTC_DO_SYNC_NEGO
|
514 NTC_DO_WIDE_NEGO
| NTC_DO_TAG_QUEUEING
|
516 NTC_DO_PARITY_CHK
| NTC_DO_SEND_START
522 #ifdef CONFIG_SCSI_MULTI_LUN
525 NAC_GT2DRIVES
| NAC_GREATER_1G
| NAC_POWERON_SCSI_RESET
526 /*| NAC_ACTIVE_NEG*/,
527 NAC_GT2DRIVES
| NAC_GREATER_1G
| NAC_POWERON_SCSI_RESET
| 0x08
533 3, /* 16 tags (??) */
547 * Safe settings. If set to zero the BIOS/default values with
548 * command line overrides will be used. If set to 1 then safe and
549 * slow settings will be used.
551 static bool use_safe_settings
= 0;
552 module_param_named(safe
, use_safe_settings
, bool, 0);
553 MODULE_PARM_DESC(safe
, "Use safe and slow settings only. Default: false");
556 module_param_named(adapter_id
, cfg_data
[CFG_ADAPTER_ID
].value
, int, 0);
557 MODULE_PARM_DESC(adapter_id
, "Adapter SCSI ID. Default 7 (0-15)");
559 module_param_named(max_speed
, cfg_data
[CFG_MAX_SPEED
].value
, int, 0);
560 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");
562 module_param_named(dev_mode
, cfg_data
[CFG_DEV_MODE
].value
, int, 0);
563 MODULE_PARM_DESC(dev_mode
, "Device mode.");
565 module_param_named(adapter_mode
, cfg_data
[CFG_ADAPTER_MODE
].value
, int, 0);
566 MODULE_PARM_DESC(adapter_mode
, "Adapter mode.");
568 module_param_named(tags
, cfg_data
[CFG_TAGS
].value
, int, 0);
569 MODULE_PARM_DESC(tags
, "Number of tags (1<<x). Default 3 (0-5)");
571 module_param_named(reset_delay
, cfg_data
[CFG_RESET_DELAY
].value
, int, 0);
572 MODULE_PARM_DESC(reset_delay
, "Reset delay in seconds. Default 1 (0-180)");
576 * set_safe_settings - if the use_safe_settings option is set then
577 * set all values to the safe and slow values.
579 static void set_safe_settings(void)
581 if (use_safe_settings
)
585 dprintkl(KERN_INFO
, "Using safe settings.\n");
586 for (i
= 0; i
< CFG_NUM
; i
++)
588 cfg_data
[i
].value
= cfg_data
[i
].safe
;
595 * fix_settings - reset any boot parameters which are out of range
596 * back to the default values.
598 static void fix_settings(void)
603 "setup: AdapterId=%08x MaxSpeed=%08x DevMode=%08x "
604 "AdapterMode=%08x Tags=%08x ResetDelay=%08x\n",
605 cfg_data
[CFG_ADAPTER_ID
].value
,
606 cfg_data
[CFG_MAX_SPEED
].value
,
607 cfg_data
[CFG_DEV_MODE
].value
,
608 cfg_data
[CFG_ADAPTER_MODE
].value
,
609 cfg_data
[CFG_TAGS
].value
,
610 cfg_data
[CFG_RESET_DELAY
].value
);
611 for (i
= 0; i
< CFG_NUM
; i
++)
613 if (cfg_data
[i
].value
< cfg_data
[i
].min
614 || cfg_data
[i
].value
> cfg_data
[i
].max
)
615 cfg_data
[i
].value
= cfg_data
[i
].def
;
622 * Mapping from the eeprom delay index value (index into this array)
623 * to the number of actual seconds that the delay should be for.
625 static char eeprom_index_to_delay_map
[] =
626 { 1, 3, 5, 10, 16, 30, 60, 120 };
630 * eeprom_index_to_delay - Take the eeprom delay setting and convert it
631 * into a number of seconds.
633 * @eeprom: The eeprom structure in which we find the delay index to map.
635 static void eeprom_index_to_delay(struct NvRamType
*eeprom
)
637 eeprom
->delay_time
= eeprom_index_to_delay_map
[eeprom
->delay_time
];
642 * delay_to_eeprom_index - Take a delay in seconds and return the
643 * closest eeprom index which will delay for at least that amount of
646 * @delay: The delay, in seconds, to find the eeprom index for.
648 static int delay_to_eeprom_index(int delay
)
651 while (idx
< 7 && eeprom_index_to_delay_map
[idx
] < delay
)
658 * eeprom_override - Override the eeprom settings, in the provided
659 * eeprom structure, with values that have been set on the command
662 * @eeprom: The eeprom data to override with command line options.
664 static void eeprom_override(struct NvRamType
*eeprom
)
668 /* Adapter Settings */
669 if (cfg_data
[CFG_ADAPTER_ID
].value
!= CFG_PARAM_UNSET
)
670 eeprom
->scsi_id
= (u8
)cfg_data
[CFG_ADAPTER_ID
].value
;
672 if (cfg_data
[CFG_ADAPTER_MODE
].value
!= CFG_PARAM_UNSET
)
673 eeprom
->channel_cfg
= (u8
)cfg_data
[CFG_ADAPTER_MODE
].value
;
675 if (cfg_data
[CFG_RESET_DELAY
].value
!= CFG_PARAM_UNSET
)
676 eeprom
->delay_time
= delay_to_eeprom_index(
677 cfg_data
[CFG_RESET_DELAY
].value
);
679 if (cfg_data
[CFG_TAGS
].value
!= CFG_PARAM_UNSET
)
680 eeprom
->max_tag
= (u8
)cfg_data
[CFG_TAGS
].value
;
682 /* Device Settings */
683 for (id
= 0; id
< DC395x_MAX_SCSI_ID
; id
++) {
684 if (cfg_data
[CFG_DEV_MODE
].value
!= CFG_PARAM_UNSET
)
685 eeprom
->target
[id
].cfg0
=
686 (u8
)cfg_data
[CFG_DEV_MODE
].value
;
688 if (cfg_data
[CFG_MAX_SPEED
].value
!= CFG_PARAM_UNSET
)
689 eeprom
->target
[id
].period
=
690 (u8
)cfg_data
[CFG_MAX_SPEED
].value
;
696 /*---------------------------------------------------------------------------
697 ---------------------------------------------------------------------------*/
699 static unsigned int list_size(struct list_head
*head
)
701 unsigned int count
= 0;
702 struct list_head
*pos
;
703 list_for_each(pos
, head
)
709 static struct DeviceCtlBlk
*dcb_get_next(struct list_head
*head
,
710 struct DeviceCtlBlk
*pos
)
713 struct DeviceCtlBlk
* next
= NULL
;
714 struct DeviceCtlBlk
* i
;
716 if (list_empty(head
))
719 /* find supplied dcb and then select the next one */
720 list_for_each_entry(i
, head
, list
)
724 } else if (i
== pos
) {
727 /* if no next one take the head one (ie, wraparound) */
729 list_for_each_entry(i
, head
, list
) {
738 static void free_tag(struct DeviceCtlBlk
*dcb
, struct ScsiReqBlk
*srb
)
740 if (srb
->tag_number
< 255) {
741 dcb
->tag_mask
&= ~(1 << srb
->tag_number
); /* free tag mask */
742 srb
->tag_number
= 255;
747 /* Find cmd in SRB list */
748 static inline struct ScsiReqBlk
*find_cmd(struct scsi_cmnd
*cmd
,
749 struct list_head
*head
)
751 struct ScsiReqBlk
*i
;
752 list_for_each_entry(i
, head
, list
)
759 static struct ScsiReqBlk
*srb_get_free(struct AdapterCtlBlk
*acb
)
761 struct list_head
*head
= &acb
->srb_free_list
;
762 struct ScsiReqBlk
*srb
= NULL
;
764 if (!list_empty(head
)) {
765 srb
= list_entry(head
->next
, struct ScsiReqBlk
, list
);
766 list_del(head
->next
);
767 dprintkdbg(DBG_0
, "srb_get_free: srb=%p\n", srb
);
773 static void srb_free_insert(struct AdapterCtlBlk
*acb
, struct ScsiReqBlk
*srb
)
775 dprintkdbg(DBG_0
, "srb_free_insert: srb=%p\n", srb
);
776 list_add_tail(&srb
->list
, &acb
->srb_free_list
);
780 static void srb_waiting_insert(struct DeviceCtlBlk
*dcb
,
781 struct ScsiReqBlk
*srb
)
783 dprintkdbg(DBG_0
, "srb_waiting_insert: (0x%p) <%02i-%i> srb=%p\n",
784 srb
->cmd
, dcb
->target_id
, dcb
->target_lun
, srb
);
785 list_add(&srb
->list
, &dcb
->srb_waiting_list
);
789 static void srb_waiting_append(struct DeviceCtlBlk
*dcb
,
790 struct ScsiReqBlk
*srb
)
792 dprintkdbg(DBG_0
, "srb_waiting_append: (0x%p) <%02i-%i> srb=%p\n",
793 srb
->cmd
, dcb
->target_id
, dcb
->target_lun
, srb
);
794 list_add_tail(&srb
->list
, &dcb
->srb_waiting_list
);
798 static void srb_going_append(struct DeviceCtlBlk
*dcb
, struct ScsiReqBlk
*srb
)
800 dprintkdbg(DBG_0
, "srb_going_append: (0x%p) <%02i-%i> srb=%p\n",
801 srb
->cmd
, dcb
->target_id
, dcb
->target_lun
, srb
);
802 list_add_tail(&srb
->list
, &dcb
->srb_going_list
);
806 static void srb_going_remove(struct DeviceCtlBlk
*dcb
, struct ScsiReqBlk
*srb
)
808 struct ScsiReqBlk
*i
;
809 struct ScsiReqBlk
*tmp
;
810 dprintkdbg(DBG_0
, "srb_going_remove: (0x%p) <%02i-%i> srb=%p\n",
811 srb
->cmd
, dcb
->target_id
, dcb
->target_lun
, srb
);
813 list_for_each_entry_safe(i
, tmp
, &dcb
->srb_going_list
, list
)
815 list_del(&srb
->list
);
821 static void srb_waiting_remove(struct DeviceCtlBlk
*dcb
,
822 struct ScsiReqBlk
*srb
)
824 struct ScsiReqBlk
*i
;
825 struct ScsiReqBlk
*tmp
;
826 dprintkdbg(DBG_0
, "srb_waiting_remove: (0x%p) <%02i-%i> srb=%p\n",
827 srb
->cmd
, dcb
->target_id
, dcb
->target_lun
, srb
);
829 list_for_each_entry_safe(i
, tmp
, &dcb
->srb_waiting_list
, list
)
831 list_del(&srb
->list
);
837 static void srb_going_to_waiting_move(struct DeviceCtlBlk
*dcb
,
838 struct ScsiReqBlk
*srb
)
841 "srb_going_to_waiting_move: (0x%p) <%02i-%i> srb=%p\n",
842 srb
->cmd
, dcb
->target_id
, dcb
->target_lun
, srb
);
843 list_move(&srb
->list
, &dcb
->srb_waiting_list
);
847 static void srb_waiting_to_going_move(struct DeviceCtlBlk
*dcb
,
848 struct ScsiReqBlk
*srb
)
851 "srb_waiting_to_going_move: (0x%p) <%02i-%i> srb=%p\n",
852 srb
->cmd
, dcb
->target_id
, dcb
->target_lun
, srb
);
853 list_move(&srb
->list
, &dcb
->srb_going_list
);
857 /* Sets the timer to wake us up */
858 static void waiting_set_timer(struct AdapterCtlBlk
*acb
, unsigned long to
)
860 if (timer_pending(&acb
->waiting_timer
))
862 init_timer(&acb
->waiting_timer
);
863 acb
->waiting_timer
.function
= waiting_timeout
;
864 acb
->waiting_timer
.data
= (unsigned long) acb
;
865 if (time_before(jiffies
+ to
, acb
->last_reset
- HZ
/ 2))
866 acb
->waiting_timer
.expires
=
867 acb
->last_reset
- HZ
/ 2 + 1;
869 acb
->waiting_timer
.expires
= jiffies
+ to
+ 1;
870 add_timer(&acb
->waiting_timer
);
874 /* Send the next command from the waiting list to the bus */
875 static void waiting_process_next(struct AdapterCtlBlk
*acb
)
877 struct DeviceCtlBlk
*start
= NULL
;
878 struct DeviceCtlBlk
*pos
;
879 struct DeviceCtlBlk
*dcb
;
880 struct ScsiReqBlk
*srb
;
881 struct list_head
*dcb_list_head
= &acb
->dcb_list
;
884 || (acb
->acb_flag
& (RESET_DETECT
+ RESET_DONE
+ RESET_DEV
)))
887 if (timer_pending(&acb
->waiting_timer
))
888 del_timer(&acb
->waiting_timer
);
890 if (list_empty(dcb_list_head
))
894 * Find the starting dcb. Need to find it again in the list
895 * since the list may have changed since we set the ptr to it
897 list_for_each_entry(dcb
, dcb_list_head
, list
)
898 if (dcb
== acb
->dcb_run_robin
) {
903 /* This can happen! */
904 start
= list_entry(dcb_list_head
->next
, typeof(*start
), list
);
905 acb
->dcb_run_robin
= start
;
910 * Loop over the dcb, but we start somewhere (potentially) in
911 * the middle of the loop so we need to manully do this.
915 struct list_head
*waiting_list_head
= &pos
->srb_waiting_list
;
917 /* Make sure, the next another device gets scheduled ... */
918 acb
->dcb_run_robin
= dcb_get_next(dcb_list_head
,
921 if (list_empty(waiting_list_head
) ||
922 pos
->max_command
<= list_size(&pos
->srb_going_list
)) {
923 /* move to next dcb */
924 pos
= dcb_get_next(dcb_list_head
, pos
);
926 srb
= list_entry(waiting_list_head
->next
,
927 struct ScsiReqBlk
, list
);
929 /* Try to send to the bus */
930 if (!start_scsi(acb
, pos
, srb
))
931 srb_waiting_to_going_move(pos
, srb
);
933 waiting_set_timer(acb
, HZ
/50);
936 } while (pos
!= start
);
940 /* Wake up waiting queue */
941 static void waiting_timeout(unsigned long ptr
)
944 struct AdapterCtlBlk
*acb
= (struct AdapterCtlBlk
*)ptr
;
946 "waiting_timeout: Queue woken up by timer. acb=%p\n", acb
);
947 DC395x_LOCK_IO(acb
->scsi_host
, flags
);
948 waiting_process_next(acb
);
949 DC395x_UNLOCK_IO(acb
->scsi_host
, flags
);
953 /* Get the DCB for a given ID/LUN combination */
954 static struct DeviceCtlBlk
*find_dcb(struct AdapterCtlBlk
*acb
, u8 id
, u8 lun
)
956 return acb
->children
[id
][lun
];
960 /* Send SCSI Request Block (srb) to adapter (acb) */
961 static void send_srb(struct AdapterCtlBlk
*acb
, struct ScsiReqBlk
*srb
)
963 struct DeviceCtlBlk
*dcb
= srb
->dcb
;
965 if (dcb
->max_command
<= list_size(&dcb
->srb_going_list
) ||
967 (acb
->acb_flag
& (RESET_DETECT
+ RESET_DONE
+ RESET_DEV
))) {
968 srb_waiting_append(dcb
, srb
);
969 waiting_process_next(acb
);
973 if (!start_scsi(acb
, dcb
, srb
))
974 srb_going_append(dcb
, srb
);
976 srb_waiting_insert(dcb
, srb
);
977 waiting_set_timer(acb
, HZ
/ 50);
981 /* Prepare SRB for being sent to Device DCB w/ command *cmd */
982 static void build_srb(struct scsi_cmnd
*cmd
, struct DeviceCtlBlk
*dcb
,
983 struct ScsiReqBlk
*srb
)
986 enum dma_data_direction dir
= cmd
->sc_data_direction
;
987 dprintkdbg(DBG_0
, "build_srb: (0x%p) <%02i-%i>\n",
988 cmd
, dcb
->target_id
, dcb
->target_lun
);
993 srb
->total_xfer_length
= 0;
994 srb
->sg_bus_addr
= 0;
996 srb
->adapter_status
= 0;
997 srb
->target_status
= 0;
1002 srb
->retry_count
= 0;
1003 srb
->tag_number
= TAG_NONE
;
1004 srb
->scsi_phase
= PH_BUS_FREE
; /* initial phase */
1005 srb
->end_message
= 0;
1007 nseg
= scsi_dma_map(cmd
);
1010 if (dir
== PCI_DMA_NONE
|| !nseg
) {
1012 "build_srb: [0] len=%d buf=%p use_sg=%d !MAP=%08x\n",
1013 cmd
->bufflen
, scsi_sglist(cmd
), scsi_sg_count(cmd
),
1014 srb
->segment_x
[0].address
);
1017 u32 reqlen
= scsi_bufflen(cmd
);
1018 struct scatterlist
*sg
;
1019 struct SGentry
*sgp
= srb
->segment_x
;
1021 srb
->sg_count
= nseg
;
1024 "build_srb: [n] len=%d buf=%p use_sg=%d segs=%d\n",
1025 reqlen
, scsi_sglist(cmd
), scsi_sg_count(cmd
),
1028 scsi_for_each_sg(cmd
, sg
, srb
->sg_count
, i
) {
1029 u32 busaddr
= (u32
)sg_dma_address(sg
);
1030 u32 seglen
= (u32
)sg
->length
;
1031 sgp
[i
].address
= busaddr
;
1032 sgp
[i
].length
= seglen
;
1033 srb
->total_xfer_length
+= seglen
;
1035 sgp
+= srb
->sg_count
- 1;
1038 * adjust last page if too big as it is allocated
1039 * on even page boundaries
1041 if (srb
->total_xfer_length
> reqlen
) {
1042 sgp
->length
-= (srb
->total_xfer_length
- reqlen
);
1043 srb
->total_xfer_length
= reqlen
;
1046 /* Fixup for WIDE padding - make sure length is even */
1047 if (dcb
->sync_period
& WIDE_SYNC
&&
1048 srb
->total_xfer_length
% 2) {
1049 srb
->total_xfer_length
++;
1053 srb
->sg_bus_addr
= pci_map_single(dcb
->acb
->dev
,
1058 dprintkdbg(DBG_SG
, "build_srb: [n] map sg %p->%08x(%05x)\n",
1059 srb
->segment_x
, srb
->sg_bus_addr
, SEGMENTX_LEN
);
1062 srb
->request_length
= srb
->total_xfer_length
;
1067 * dc395x_queue_command - queue scsi command passed from the mid
1068 * layer, invoke 'done' on completion
1070 * @cmd: pointer to scsi command object
1071 * @done: function pointer to be invoked on completion
1073 * Returns 1 if the adapter (host) is busy, else returns 0. One
1074 * reason for an adapter to be busy is that the number
1075 * of outstanding queued commands is already equal to
1076 * struct Scsi_Host::can_queue .
1078 * Required: if struct Scsi_Host::can_queue is ever non-zero
1079 * then this function is required.
1081 * Locks: struct Scsi_Host::host_lock held on entry (with "irqsave")
1082 * and is expected to be held on return.
1085 static int dc395x_queue_command_lck(struct scsi_cmnd
*cmd
, void (*done
)(struct scsi_cmnd
*))
1087 struct DeviceCtlBlk
*dcb
;
1088 struct ScsiReqBlk
*srb
;
1089 struct AdapterCtlBlk
*acb
=
1090 (struct AdapterCtlBlk
*)cmd
->device
->host
->hostdata
;
1091 dprintkdbg(DBG_0
, "queue_command: (0x%p) <%02i-%i> cmnd=0x%02x\n",
1092 cmd
, cmd
->device
->id
, cmd
->device
->lun
, cmd
->cmnd
[0]);
1094 /* Assume BAD_TARGET; will be cleared later */
1095 cmd
->result
= DID_BAD_TARGET
<< 16;
1097 /* ignore invalid targets */
1098 if (cmd
->device
->id
>= acb
->scsi_host
->max_id
||
1099 cmd
->device
->lun
>= acb
->scsi_host
->max_lun
||
1100 cmd
->device
->lun
>31) {
1104 /* does the specified lun on the specified device exist */
1105 if (!(acb
->dcb_map
[cmd
->device
->id
] & (1 << cmd
->device
->lun
))) {
1106 dprintkl(KERN_INFO
, "queue_command: Ignore target <%02i-%i>\n",
1107 cmd
->device
->id
, cmd
->device
->lun
);
1111 /* do we have a DCB for the device */
1112 dcb
= find_dcb(acb
, cmd
->device
->id
, cmd
->device
->lun
);
1114 /* should never happen */
1115 dprintkl(KERN_ERR
, "queue_command: No such device <%02i-%i>",
1116 cmd
->device
->id
, cmd
->device
->lun
);
1120 /* set callback and clear result in the command */
1121 cmd
->scsi_done
= done
;
1124 srb
= srb_get_free(acb
);
1128 * Return 1 since we are unable to queue this command at this
1131 dprintkdbg(DBG_0
, "queue_command: No free srb's\n");
1135 build_srb(cmd
, dcb
, srb
);
1137 if (!list_empty(&dcb
->srb_waiting_list
)) {
1138 /* append to waiting queue */
1139 srb_waiting_append(dcb
, srb
);
1140 waiting_process_next(acb
);
1142 /* process immediately */
1145 dprintkdbg(DBG_1
, "queue_command: (0x%p) done\n", cmd
);
1150 * Complete the command immediatey, and then return 0 to
1151 * indicate that we have handled the command. This is usually
1152 * done when the commad is for things like non existent
1159 static DEF_SCSI_QCMD(dc395x_queue_command
)
1162 * Return the disk geometry for the given SCSI device.
1164 static int dc395x_bios_param(struct scsi_device
*sdev
,
1165 struct block_device
*bdev
, sector_t capacity
, int *info
)
1167 #ifdef CONFIG_SCSI_DC395x_TRMS1040_TRADMAP
1168 int heads
, sectors
, cylinders
;
1169 struct AdapterCtlBlk
*acb
;
1170 int size
= capacity
;
1172 dprintkdbg(DBG_0
, "dc395x_bios_param..............\n");
1173 acb
= (struct AdapterCtlBlk
*)sdev
->host
->hostdata
;
1176 cylinders
= size
/ (heads
* sectors
);
1178 if ((acb
->gmode2
& NAC_GREATER_1G
) && (cylinders
> 1024)) {
1181 cylinders
= size
/ (heads
* sectors
);
1185 geom
[2] = cylinders
;
1188 return scsicam_bios_param(bdev
, capacity
, info
);
1193 static void dump_register_info(struct AdapterCtlBlk
*acb
,
1194 struct DeviceCtlBlk
*dcb
, struct ScsiReqBlk
*srb
)
1197 struct pci_dev
*dev
= acb
->dev
;
1198 pci_read_config_word(dev
, PCI_STATUS
, &pstat
);
1200 dcb
= acb
->active_dcb
;
1202 srb
= dcb
->active_srb
;
1205 dprintkl(KERN_INFO
, "dump: srb=%p cmd=%p OOOPS!\n",
1208 dprintkl(KERN_INFO
, "dump: srb=%p cmd=%p "
1209 "cmnd=0x%02x <%02i-%i>\n",
1211 srb
->cmd
->cmnd
[0], srb
->cmd
->device
->id
,
1212 srb
->cmd
->device
->lun
);
1213 printk(" sglist=%p cnt=%i idx=%i len=%zu\n",
1214 srb
->segment_x
, srb
->sg_count
, srb
->sg_index
,
1215 srb
->total_xfer_length
);
1216 printk(" state=0x%04x status=0x%02x phase=0x%02x (%sconn.)\n",
1217 srb
->state
, srb
->status
, srb
->scsi_phase
,
1218 (acb
->active_dcb
) ? "" : "not");
1220 dprintkl(KERN_INFO
, "dump: SCSI{status=0x%04x fifocnt=0x%02x "
1221 "signals=0x%02x irqstat=0x%02x sync=0x%02x target=0x%02x "
1222 "rselid=0x%02x ctr=0x%08x irqen=0x%02x config=0x%04x "
1223 "config2=0x%02x cmd=0x%02x selto=0x%02x}\n",
1224 DC395x_read16(acb
, TRM_S1040_SCSI_STATUS
),
1225 DC395x_read8(acb
, TRM_S1040_SCSI_FIFOCNT
),
1226 DC395x_read8(acb
, TRM_S1040_SCSI_SIGNAL
),
1227 DC395x_read8(acb
, TRM_S1040_SCSI_INTSTATUS
),
1228 DC395x_read8(acb
, TRM_S1040_SCSI_SYNC
),
1229 DC395x_read8(acb
, TRM_S1040_SCSI_TARGETID
),
1230 DC395x_read8(acb
, TRM_S1040_SCSI_IDMSG
),
1231 DC395x_read32(acb
, TRM_S1040_SCSI_COUNTER
),
1232 DC395x_read8(acb
, TRM_S1040_SCSI_INTEN
),
1233 DC395x_read16(acb
, TRM_S1040_SCSI_CONFIG0
),
1234 DC395x_read8(acb
, TRM_S1040_SCSI_CONFIG2
),
1235 DC395x_read8(acb
, TRM_S1040_SCSI_COMMAND
),
1236 DC395x_read8(acb
, TRM_S1040_SCSI_TIMEOUT
));
1237 dprintkl(KERN_INFO
, "dump: DMA{cmd=0x%04x fifocnt=0x%02x fstat=0x%02x "
1238 "irqstat=0x%02x irqen=0x%02x cfg=0x%04x tctr=0x%08x "
1239 "ctctr=0x%08x addr=0x%08x:0x%08x}\n",
1240 DC395x_read16(acb
, TRM_S1040_DMA_COMMAND
),
1241 DC395x_read8(acb
, TRM_S1040_DMA_FIFOCNT
),
1242 DC395x_read8(acb
, TRM_S1040_DMA_FIFOSTAT
),
1243 DC395x_read8(acb
, TRM_S1040_DMA_STATUS
),
1244 DC395x_read8(acb
, TRM_S1040_DMA_INTEN
),
1245 DC395x_read16(acb
, TRM_S1040_DMA_CONFIG
),
1246 DC395x_read32(acb
, TRM_S1040_DMA_XCNT
),
1247 DC395x_read32(acb
, TRM_S1040_DMA_CXCNT
),
1248 DC395x_read32(acb
, TRM_S1040_DMA_XHIGHADDR
),
1249 DC395x_read32(acb
, TRM_S1040_DMA_XLOWADDR
));
1250 dprintkl(KERN_INFO
, "dump: gen{gctrl=0x%02x gstat=0x%02x gtmr=0x%02x} "
1251 "pci{status=0x%04x}\n",
1252 DC395x_read8(acb
, TRM_S1040_GEN_CONTROL
),
1253 DC395x_read8(acb
, TRM_S1040_GEN_STATUS
),
1254 DC395x_read8(acb
, TRM_S1040_GEN_TIMER
),
1259 static inline void clear_fifo(struct AdapterCtlBlk
*acb
, char *txt
)
1261 #if debug_enabled(DBG_FIFO)
1262 u8 lines
= DC395x_read8(acb
, TRM_S1040_SCSI_SIGNAL
);
1263 u8 fifocnt
= DC395x_read8(acb
, TRM_S1040_SCSI_FIFOCNT
);
1264 if (!(fifocnt
& 0x40))
1265 dprintkdbg(DBG_FIFO
,
1266 "clear_fifo: (%i bytes) on phase %02x in %s\n",
1267 fifocnt
& 0x3f, lines
, txt
);
1269 DC395x_write16(acb
, TRM_S1040_SCSI_CONTROL
, DO_CLRFIFO
);
1273 static void reset_dev_param(struct AdapterCtlBlk
*acb
)
1275 struct DeviceCtlBlk
*dcb
;
1276 struct NvRamType
*eeprom
= &acb
->eeprom
;
1277 dprintkdbg(DBG_0
, "reset_dev_param: acb=%p\n", acb
);
1279 list_for_each_entry(dcb
, &acb
->dcb_list
, list
) {
1282 dcb
->sync_mode
&= ~(SYNC_NEGO_DONE
+ WIDE_NEGO_DONE
);
1283 dcb
->sync_period
= 0;
1284 dcb
->sync_offset
= 0;
1286 dcb
->dev_mode
= eeprom
->target
[dcb
->target_id
].cfg0
;
1287 period_index
= eeprom
->target
[dcb
->target_id
].period
& 0x07;
1288 dcb
->min_nego_period
= clock_period
[period_index
];
1289 if (!(dcb
->dev_mode
& NTC_DO_WIDE_NEGO
)
1290 || !(acb
->config
& HCC_WIDE_CARD
))
1291 dcb
->sync_mode
&= ~WIDE_NEGO_ENABLE
;
1297 * perform a hard reset on the SCSI bus
1298 * @cmd - some command for this host (for fetching hooks)
1299 * Returns: SUCCESS (0x2002) on success, else FAILED (0x2003).
1301 static int __dc395x_eh_bus_reset(struct scsi_cmnd
*cmd
)
1303 struct AdapterCtlBlk
*acb
=
1304 (struct AdapterCtlBlk
*)cmd
->device
->host
->hostdata
;
1306 "eh_bus_reset: (0%p) target=<%02i-%i> cmd=%p\n",
1307 cmd
, cmd
->device
->id
, cmd
->device
->lun
, cmd
);
1309 if (timer_pending(&acb
->waiting_timer
))
1310 del_timer(&acb
->waiting_timer
);
1315 DC395x_write8(acb
, TRM_S1040_DMA_INTEN
, 0x00);
1316 DC395x_write8(acb
, TRM_S1040_SCSI_INTEN
, 0x00);
1317 DC395x_write8(acb
, TRM_S1040_SCSI_CONTROL
, DO_RSTMODULE
);
1318 DC395x_write8(acb
, TRM_S1040_DMA_CONTROL
, DMARESETMODULE
);
1320 reset_scsi_bus(acb
);
1323 /* We may be in serious trouble. Wait some seconds */
1325 jiffies
+ 3 * HZ
/ 2 +
1326 HZ
* acb
->eeprom
.delay_time
;
1329 * re-enable interrupt
1331 /* Clear SCSI FIFO */
1332 DC395x_write8(acb
, TRM_S1040_DMA_CONTROL
, CLRXFIFO
);
1333 clear_fifo(acb
, "eh_bus_reset");
1334 /* Delete pending IRQ */
1335 DC395x_read8(acb
, TRM_S1040_SCSI_INTSTATUS
);
1336 set_basic_config(acb
);
1338 reset_dev_param(acb
);
1339 doing_srb_done(acb
, DID_RESET
, cmd
, 0);
1340 acb
->active_dcb
= NULL
;
1341 acb
->acb_flag
= 0; /* RESET_DETECT, RESET_DONE ,RESET_DEV */
1342 waiting_process_next(acb
);
1347 static int dc395x_eh_bus_reset(struct scsi_cmnd
*cmd
)
1351 spin_lock_irq(cmd
->device
->host
->host_lock
);
1352 rc
= __dc395x_eh_bus_reset(cmd
);
1353 spin_unlock_irq(cmd
->device
->host
->host_lock
);
1359 * abort an errant SCSI command
1360 * @cmd - command to be aborted
1361 * Returns: SUCCESS (0x2002) on success, else FAILED (0x2003).
1363 static int dc395x_eh_abort(struct scsi_cmnd
*cmd
)
1366 * Look into our command queues: If it has not been sent already,
1367 * we remove it and return success. Otherwise fail.
1369 struct AdapterCtlBlk
*acb
=
1370 (struct AdapterCtlBlk
*)cmd
->device
->host
->hostdata
;
1371 struct DeviceCtlBlk
*dcb
;
1372 struct ScsiReqBlk
*srb
;
1373 dprintkl(KERN_INFO
, "eh_abort: (0x%p) target=<%02i-%i> cmd=%p\n",
1374 cmd
, cmd
->device
->id
, cmd
->device
->lun
, cmd
);
1376 dcb
= find_dcb(acb
, cmd
->device
->id
, cmd
->device
->lun
);
1378 dprintkl(KERN_DEBUG
, "eh_abort: No such device\n");
1382 srb
= find_cmd(cmd
, &dcb
->srb_waiting_list
);
1384 srb_waiting_remove(dcb
, srb
);
1385 pci_unmap_srb_sense(acb
, srb
);
1386 pci_unmap_srb(acb
, srb
);
1388 srb_free_insert(acb
, srb
);
1389 dprintkl(KERN_DEBUG
, "eh_abort: Command was waiting\n");
1390 cmd
->result
= DID_ABORT
<< 16;
1393 srb
= find_cmd(cmd
, &dcb
->srb_going_list
);
1395 dprintkl(KERN_DEBUG
, "eh_abort: Command in progress\n");
1396 /* XXX: Should abort the command here */
1398 dprintkl(KERN_DEBUG
, "eh_abort: Command not found\n");
1405 static void build_sdtr(struct AdapterCtlBlk
*acb
, struct DeviceCtlBlk
*dcb
,
1406 struct ScsiReqBlk
*srb
)
1408 u8
*ptr
= srb
->msgout_buf
+ srb
->msg_count
;
1409 if (srb
->msg_count
> 1) {
1411 "build_sdtr: msgout_buf BUSY (%i: %02x %02x)\n",
1412 srb
->msg_count
, srb
->msgout_buf
[0],
1413 srb
->msgout_buf
[1]);
1416 if (!(dcb
->dev_mode
& NTC_DO_SYNC_NEGO
)) {
1417 dcb
->sync_offset
= 0;
1418 dcb
->min_nego_period
= 200 >> 2;
1419 } else if (dcb
->sync_offset
== 0)
1420 dcb
->sync_offset
= SYNC_NEGO_OFFSET
;
1422 *ptr
++ = MSG_EXTENDED
; /* (01h) */
1423 *ptr
++ = 3; /* length */
1424 *ptr
++ = EXTENDED_SDTR
; /* (01h) */
1425 *ptr
++ = dcb
->min_nego_period
; /* Transfer period (in 4ns) */
1426 *ptr
++ = dcb
->sync_offset
; /* Transfer period (max. REQ/ACK dist) */
1427 srb
->msg_count
+= 5;
1428 srb
->state
|= SRB_DO_SYNC_NEGO
;
1433 static void build_wdtr(struct AdapterCtlBlk
*acb
, struct DeviceCtlBlk
*dcb
,
1434 struct ScsiReqBlk
*srb
)
1436 u8 wide
= ((dcb
->dev_mode
& NTC_DO_WIDE_NEGO
) &
1437 (acb
->config
& HCC_WIDE_CARD
)) ? 1 : 0;
1438 u8
*ptr
= srb
->msgout_buf
+ srb
->msg_count
;
1439 if (srb
->msg_count
> 1) {
1441 "build_wdtr: msgout_buf BUSY (%i: %02x %02x)\n",
1442 srb
->msg_count
, srb
->msgout_buf
[0],
1443 srb
->msgout_buf
[1]);
1446 *ptr
++ = MSG_EXTENDED
; /* (01h) */
1447 *ptr
++ = 2; /* length */
1448 *ptr
++ = EXTENDED_WDTR
; /* (03h) */
1450 srb
->msg_count
+= 4;
1451 srb
->state
|= SRB_DO_WIDE_NEGO
;
1456 /* Timer to work around chip flaw: When selecting and the bus is
1457 * busy, we sometimes miss a Selection timeout IRQ */
1458 void selection_timeout_missed(unsigned long ptr
);
1459 /* Sets the timer to wake us up */
1460 static void selto_timer(struct AdapterCtlBlk
*acb
)
1462 if (timer_pending(&acb
->selto_timer
))
1464 acb
->selto_timer
.function
= selection_timeout_missed
;
1465 acb
->selto_timer
.data
= (unsigned long) acb
;
1467 (jiffies
+ HZ
, acb
->last_reset
+ HZ
/ 2))
1468 acb
->selto_timer
.expires
=
1469 acb
->last_reset
+ HZ
/ 2 + 1;
1471 acb
->selto_timer
.expires
= jiffies
+ HZ
+ 1;
1472 add_timer(&acb
->selto_timer
);
1476 void selection_timeout_missed(unsigned long ptr
)
1478 unsigned long flags
;
1479 struct AdapterCtlBlk
*acb
= (struct AdapterCtlBlk
*)ptr
;
1480 struct ScsiReqBlk
*srb
;
1481 dprintkl(KERN_DEBUG
, "Chip forgot to produce SelTO IRQ!\n");
1482 if (!acb
->active_dcb
|| !acb
->active_dcb
->active_srb
) {
1483 dprintkl(KERN_DEBUG
, "... but no cmd pending? Oops!\n");
1486 DC395x_LOCK_IO(acb
->scsi_host
, flags
);
1487 srb
= acb
->active_dcb
->active_srb
;
1489 DC395x_UNLOCK_IO(acb
->scsi_host
, flags
);
1494 static u8
start_scsi(struct AdapterCtlBlk
* acb
, struct DeviceCtlBlk
* dcb
,
1495 struct ScsiReqBlk
* srb
)
1497 u16 s_stat2
, return_code
;
1498 u8 s_stat
, scsicommand
, i
, identify_message
;
1500 dprintkdbg(DBG_0
, "start_scsi: (0x%p) <%02i-%i> srb=%p\n",
1501 dcb
->target_id
, dcb
->target_lun
, srb
);
1503 srb
->tag_number
= TAG_NONE
; /* acb->tag_max_num: had error read in eeprom */
1505 s_stat
= DC395x_read8(acb
, TRM_S1040_SCSI_SIGNAL
);
1507 s_stat2
= DC395x_read16(acb
, TRM_S1040_SCSI_STATUS
);
1509 if (s_stat
& 0x20 /* s_stat2 & 0x02000 */ ) {
1510 dprintkdbg(DBG_KG
, "start_scsi: (0x%p) BUSY %02x %04x\n",
1515 * We could, BUT: Sometimes the TRM_S1040 misses to produce a Selection
1516 * Timeout, a Disconnect or a Reselection IRQ, so we would be screwed!
1517 * (This is likely to be a bug in the hardware. Obviously, most people
1518 * only have one initiator per SCSI bus.)
1519 * Instead let this fail and have the timer make sure the command is
1520 * tried again after a short time
1522 /*selto_timer (acb); */
1526 if (acb
->active_dcb
) {
1527 dprintkl(KERN_DEBUG
, "start_scsi: (0x%p) Attempt to start a"
1528 "command while another command (0x%p) is active.",
1530 acb
->active_dcb
->active_srb
?
1531 acb
->active_dcb
->active_srb
->cmd
: 0);
1534 if (DC395x_read16(acb
, TRM_S1040_SCSI_STATUS
) & SCSIINTERRUPT
) {
1535 dprintkdbg(DBG_KG
, "start_scsi: (0x%p) Failed (busy)\n", srb
->cmd
);
1538 /* Allow starting of SCSI commands half a second before we allow the mid-level
1539 * to queue them again after a reset */
1540 if (time_before(jiffies
, acb
->last_reset
- HZ
/ 2)) {
1541 dprintkdbg(DBG_KG
, "start_scsi: Refuse cmds (reset wait)\n");
1546 clear_fifo(acb
, "start_scsi");
1547 DC395x_write8(acb
, TRM_S1040_SCSI_HOSTID
, acb
->scsi_host
->this_id
);
1548 DC395x_write8(acb
, TRM_S1040_SCSI_TARGETID
, dcb
->target_id
);
1549 DC395x_write8(acb
, TRM_S1040_SCSI_SYNC
, dcb
->sync_period
);
1550 DC395x_write8(acb
, TRM_S1040_SCSI_OFFSET
, dcb
->sync_offset
);
1551 srb
->scsi_phase
= PH_BUS_FREE
; /* initial phase */
1553 identify_message
= dcb
->identify_msg
;
1554 /*DC395x_TRM_write8(TRM_S1040_SCSI_IDMSG, identify_message); */
1555 /* Don't allow disconnection for AUTO_REQSENSE: Cont.All.Cond.! */
1556 if (srb
->flag
& AUTO_REQSENSE
)
1557 identify_message
&= 0xBF;
1559 if (((srb
->cmd
->cmnd
[0] == INQUIRY
)
1560 || (srb
->cmd
->cmnd
[0] == REQUEST_SENSE
)
1561 || (srb
->flag
& AUTO_REQSENSE
))
1562 && (((dcb
->sync_mode
& WIDE_NEGO_ENABLE
)
1563 && !(dcb
->sync_mode
& WIDE_NEGO_DONE
))
1564 || ((dcb
->sync_mode
& SYNC_NEGO_ENABLE
)
1565 && !(dcb
->sync_mode
& SYNC_NEGO_DONE
)))
1566 && (dcb
->target_lun
== 0)) {
1567 srb
->msgout_buf
[0] = identify_message
;
1569 scsicommand
= SCMD_SEL_ATNSTOP
;
1570 srb
->state
= SRB_MSGOUT
;
1572 if (dcb
->sync_mode
& WIDE_NEGO_ENABLE
1573 && dcb
->inquiry7
& SCSI_INQ_WBUS16
) {
1574 build_wdtr(acb
, dcb
, srb
);
1578 if (dcb
->sync_mode
& SYNC_NEGO_ENABLE
1579 && dcb
->inquiry7
& SCSI_INQ_SYNC
) {
1580 build_sdtr(acb
, dcb
, srb
);
1583 if (dcb
->sync_mode
& WIDE_NEGO_ENABLE
1584 && dcb
->inquiry7
& SCSI_INQ_WBUS16
) {
1585 build_wdtr(acb
, dcb
, srb
);
1590 /* Send identify message */
1591 DC395x_write8(acb
, TRM_S1040_SCSI_FIFO
, identify_message
);
1593 scsicommand
= SCMD_SEL_ATN
;
1594 srb
->state
= SRB_START_
;
1595 #ifndef DC395x_NO_TAGQ
1596 if ((dcb
->sync_mode
& EN_TAG_QUEUEING
)
1597 && (identify_message
& 0xC0)) {
1598 /* Send Tag message */
1601 while (tag_mask
& dcb
->tag_mask
1602 && tag_number
< dcb
->max_command
) {
1603 tag_mask
= tag_mask
<< 1;
1606 if (tag_number
>= dcb
->max_command
) {
1607 dprintkl(KERN_WARNING
, "start_scsi: (0x%p) "
1608 "Out of tags target=<%02i-%i>)\n",
1609 srb
->cmd
, srb
->cmd
->device
->id
,
1610 srb
->cmd
->device
->lun
);
1611 srb
->state
= SRB_READY
;
1612 DC395x_write16(acb
, TRM_S1040_SCSI_CONTROL
,
1617 DC395x_write8(acb
, TRM_S1040_SCSI_FIFO
, MSG_SIMPLE_QTAG
);
1618 DC395x_write8(acb
, TRM_S1040_SCSI_FIFO
, tag_number
);
1619 dcb
->tag_mask
|= tag_mask
;
1620 srb
->tag_number
= tag_number
;
1621 scsicommand
= SCMD_SEL_ATN3
;
1622 srb
->state
= SRB_START_
;
1626 /* Send CDB ..command block ......... */
1627 dprintkdbg(DBG_KG
, "start_scsi: (0x%p) <%02i-%i> cmnd=0x%02x tag=%i\n",
1628 srb
->cmd
, srb
->cmd
->device
->id
, srb
->cmd
->device
->lun
,
1629 srb
->cmd
->cmnd
[0], srb
->tag_number
);
1630 if (srb
->flag
& AUTO_REQSENSE
) {
1631 DC395x_write8(acb
, TRM_S1040_SCSI_FIFO
, REQUEST_SENSE
);
1632 DC395x_write8(acb
, TRM_S1040_SCSI_FIFO
, (dcb
->target_lun
<< 5));
1633 DC395x_write8(acb
, TRM_S1040_SCSI_FIFO
, 0);
1634 DC395x_write8(acb
, TRM_S1040_SCSI_FIFO
, 0);
1635 DC395x_write8(acb
, TRM_S1040_SCSI_FIFO
, SCSI_SENSE_BUFFERSIZE
);
1636 DC395x_write8(acb
, TRM_S1040_SCSI_FIFO
, 0);
1638 ptr
= (u8
*)srb
->cmd
->cmnd
;
1639 for (i
= 0; i
< srb
->cmd
->cmd_len
; i
++)
1640 DC395x_write8(acb
, TRM_S1040_SCSI_FIFO
, *ptr
++);
1643 DC395x_write16(acb
, TRM_S1040_SCSI_CONTROL
,
1644 DO_HWRESELECT
| DO_DATALATCH
);
1645 if (DC395x_read16(acb
, TRM_S1040_SCSI_STATUS
) & SCSIINTERRUPT
) {
1647 * If start_scsi return 1:
1648 * we caught an interrupt (must be reset or reselection ... )
1649 * : Let's process it first!
1651 dprintkdbg(DBG_0
, "start_scsi: (0x%p) <%02i-%i> Failed - busy\n",
1652 srb
->cmd
, dcb
->target_id
, dcb
->target_lun
);
1653 srb
->state
= SRB_READY
;
1657 /* This IRQ should NOT get lost, as we did not acknowledge it */
1660 * If start_scsi returns 0:
1661 * we know that the SCSI processor is free
1663 srb
->scsi_phase
= PH_BUS_FREE
; /* initial phase */
1664 dcb
->active_srb
= srb
;
1665 acb
->active_dcb
= dcb
;
1667 /* it's important for atn stop */
1668 DC395x_write16(acb
, TRM_S1040_SCSI_CONTROL
,
1669 DO_DATALATCH
| DO_HWRESELECT
);
1671 DC395x_write8(acb
, TRM_S1040_SCSI_COMMAND
, scsicommand
);
1677 #define DC395x_ENABLE_MSGOUT \
1678 DC395x_write16 (acb, TRM_S1040_SCSI_CONTROL, DO_SETATN); \
1679 srb->state |= SRB_MSGOUT
1683 static inline void enable_msgout_abort(struct AdapterCtlBlk
*acb
,
1684 struct ScsiReqBlk
*srb
)
1686 srb
->msgout_buf
[0] = ABORT
;
1688 DC395x_ENABLE_MSGOUT
;
1689 srb
->state
&= ~SRB_MSGIN
;
1690 srb
->state
|= SRB_MSGOUT
;
1695 * dc395x_handle_interrupt - Handle an interrupt that has been confirmed to
1696 * have been triggered for this card.
1698 * @acb: a pointer to the adpter control block
1699 * @scsi_status: the status return when we checked the card
1701 static void dc395x_handle_interrupt(struct AdapterCtlBlk
*acb
,
1704 struct DeviceCtlBlk
*dcb
;
1705 struct ScsiReqBlk
*srb
;
1708 unsigned long flags
;
1709 void (*dc395x_statev
)(struct AdapterCtlBlk
*, struct ScsiReqBlk
*,
1712 DC395x_LOCK_IO(acb
->scsi_host
, flags
);
1714 /* This acknowledges the IRQ */
1715 scsi_intstatus
= DC395x_read8(acb
, TRM_S1040_SCSI_INTSTATUS
);
1716 if ((scsi_status
& 0x2007) == 0x2002)
1717 dprintkl(KERN_DEBUG
,
1718 "COP after COP completed? %04x\n", scsi_status
);
1719 if (debug_enabled(DBG_KG
)) {
1720 if (scsi_intstatus
& INT_SELTIMEOUT
)
1721 dprintkdbg(DBG_KG
, "handle_interrupt: Selection timeout\n");
1723 /*dprintkl(KERN_DEBUG, "handle_interrupt: intstatus = 0x%02x ", scsi_intstatus); */
1725 if (timer_pending(&acb
->selto_timer
))
1726 del_timer(&acb
->selto_timer
);
1728 if (scsi_intstatus
& (INT_SELTIMEOUT
| INT_DISCONNECT
)) {
1729 disconnect(acb
); /* bus free interrupt */
1732 if (scsi_intstatus
& INT_RESELECTED
) {
1736 if (scsi_intstatus
& INT_SELECT
) {
1737 dprintkl(KERN_INFO
, "Host does not support target mode!\n");
1740 if (scsi_intstatus
& INT_SCSIRESET
) {
1741 scsi_reset_detect(acb
);
1744 if (scsi_intstatus
& (INT_BUSSERVICE
| INT_CMDDONE
)) {
1745 dcb
= acb
->active_dcb
;
1747 dprintkl(KERN_DEBUG
,
1748 "Oops: BusService (%04x %02x) w/o ActiveDCB!\n",
1749 scsi_status
, scsi_intstatus
);
1752 srb
= dcb
->active_srb
;
1753 if (dcb
->flag
& ABORT_DEV_
) {
1754 dprintkdbg(DBG_0
, "MsgOut Abort Device.....\n");
1755 enable_msgout_abort(acb
, srb
);
1758 /* software sequential machine */
1759 phase
= (u16
)srb
->scsi_phase
;
1763 * call dc395x_scsi_phase0[]... "phase entry"
1764 * handle every phase before start transfer
1766 /* data_out_phase0, phase:0 */
1767 /* data_in_phase0, phase:1 */
1768 /* command_phase0, phase:2 */
1769 /* status_phase0, phase:3 */
1770 /* nop0, phase:4 PH_BUS_FREE .. initial phase */
1771 /* nop0, phase:5 PH_BUS_FREE .. initial phase */
1772 /* msgout_phase0, phase:6 */
1773 /* msgin_phase0, phase:7 */
1774 dc395x_statev
= dc395x_scsi_phase0
[phase
];
1775 dc395x_statev(acb
, srb
, &scsi_status
);
1778 * if there were any exception occurred scsi_status
1779 * will be modify to bus free phase new scsi_status
1780 * transfer out from ... previous dc395x_statev
1782 srb
->scsi_phase
= scsi_status
& PHASEMASK
;
1783 phase
= (u16
)scsi_status
& PHASEMASK
;
1786 * call dc395x_scsi_phase1[]... "phase entry" handle
1787 * every phase to do transfer
1789 /* data_out_phase1, phase:0 */
1790 /* data_in_phase1, phase:1 */
1791 /* command_phase1, phase:2 */
1792 /* status_phase1, phase:3 */
1793 /* nop1, phase:4 PH_BUS_FREE .. initial phase */
1794 /* nop1, phase:5 PH_BUS_FREE .. initial phase */
1795 /* msgout_phase1, phase:6 */
1796 /* msgin_phase1, phase:7 */
1797 dc395x_statev
= dc395x_scsi_phase1
[phase
];
1798 dc395x_statev(acb
, srb
, &scsi_status
);
1801 DC395x_UNLOCK_IO(acb
->scsi_host
, flags
);
1805 static irqreturn_t
dc395x_interrupt(int irq
, void *dev_id
)
1807 struct AdapterCtlBlk
*acb
= dev_id
;
1810 irqreturn_t handled
= IRQ_NONE
;
1813 * Check for pending interrupt
1815 scsi_status
= DC395x_read16(acb
, TRM_S1040_SCSI_STATUS
);
1816 dma_status
= DC395x_read8(acb
, TRM_S1040_DMA_STATUS
);
1817 if (scsi_status
& SCSIINTERRUPT
) {
1818 /* interrupt pending - let's process it! */
1819 dc395x_handle_interrupt(acb
, scsi_status
);
1820 handled
= IRQ_HANDLED
;
1822 else if (dma_status
& 0x20) {
1823 /* Error from the DMA engine */
1824 dprintkl(KERN_INFO
, "Interrupt from DMA engine: 0x%02x!\n", dma_status
);
1826 dprintkl(KERN_INFO
, "This means DMA error! Try to handle ...\n");
1827 if (acb
->active_dcb
) {
1828 acb
->active_dcb
-> flag
|= ABORT_DEV_
;
1829 if (acb
->active_dcb
->active_srb
)
1830 enable_msgout_abort(acb
, acb
->active_dcb
->active_srb
);
1832 DC395x_write8(acb
, TRM_S1040_DMA_CONTROL
, ABORTXFER
| CLRXFIFO
);
1834 dprintkl(KERN_INFO
, "Ignoring DMA error (probably a bad thing) ...\n");
1837 handled
= IRQ_HANDLED
;
1844 static void msgout_phase0(struct AdapterCtlBlk
*acb
, struct ScsiReqBlk
*srb
,
1847 dprintkdbg(DBG_0
, "msgout_phase0: (0x%p)\n", srb
->cmd
);
1848 if (srb
->state
& (SRB_UNEXPECT_RESEL
+ SRB_ABORT_SENT
))
1849 *pscsi_status
= PH_BUS_FREE
; /*.. initial phase */
1851 DC395x_write16(acb
, TRM_S1040_SCSI_CONTROL
, DO_DATALATCH
); /* it's important for atn stop */
1852 srb
->state
&= ~SRB_MSGOUT
;
1856 static void msgout_phase1(struct AdapterCtlBlk
*acb
, struct ScsiReqBlk
*srb
,
1861 dprintkdbg(DBG_0
, "msgout_phase1: (0x%p)\n", srb
->cmd
);
1863 clear_fifo(acb
, "msgout_phase1");
1864 if (!(srb
->state
& SRB_MSGOUT
)) {
1865 srb
->state
|= SRB_MSGOUT
;
1866 dprintkl(KERN_DEBUG
,
1867 "msgout_phase1: (0x%p) Phase unexpected\n",
1868 srb
->cmd
); /* So what ? */
1870 if (!srb
->msg_count
) {
1871 dprintkdbg(DBG_0
, "msgout_phase1: (0x%p) NOP msg\n",
1873 DC395x_write8(acb
, TRM_S1040_SCSI_FIFO
, MSG_NOP
);
1874 DC395x_write16(acb
, TRM_S1040_SCSI_CONTROL
, DO_DATALATCH
); /* it's important for atn stop */
1875 DC395x_write8(acb
, TRM_S1040_SCSI_COMMAND
, SCMD_FIFO_OUT
);
1878 ptr
= (u8
*)srb
->msgout_buf
;
1879 for (i
= 0; i
< srb
->msg_count
; i
++)
1880 DC395x_write8(acb
, TRM_S1040_SCSI_FIFO
, *ptr
++);
1882 if (srb
->msgout_buf
[0] == MSG_ABORT
)
1883 srb
->state
= SRB_ABORT_SENT
;
1885 DC395x_write8(acb
, TRM_S1040_SCSI_COMMAND
, SCMD_FIFO_OUT
);
1889 static void command_phase0(struct AdapterCtlBlk
*acb
, struct ScsiReqBlk
*srb
,
1892 dprintkdbg(DBG_0
, "command_phase0: (0x%p)\n", srb
->cmd
);
1893 DC395x_write16(acb
, TRM_S1040_SCSI_CONTROL
, DO_DATALATCH
);
1897 static void command_phase1(struct AdapterCtlBlk
*acb
, struct ScsiReqBlk
*srb
,
1900 struct DeviceCtlBlk
*dcb
;
1903 dprintkdbg(DBG_0
, "command_phase1: (0x%p)\n", srb
->cmd
);
1905 clear_fifo(acb
, "command_phase1");
1906 DC395x_write16(acb
, TRM_S1040_SCSI_CONTROL
, DO_CLRATN
);
1907 if (!(srb
->flag
& AUTO_REQSENSE
)) {
1908 ptr
= (u8
*)srb
->cmd
->cmnd
;
1909 for (i
= 0; i
< srb
->cmd
->cmd_len
; i
++) {
1910 DC395x_write8(acb
, TRM_S1040_SCSI_FIFO
, *ptr
);
1914 DC395x_write8(acb
, TRM_S1040_SCSI_FIFO
, REQUEST_SENSE
);
1915 dcb
= acb
->active_dcb
;
1917 DC395x_write8(acb
, TRM_S1040_SCSI_FIFO
, (dcb
->target_lun
<< 5));
1918 DC395x_write8(acb
, TRM_S1040_SCSI_FIFO
, 0);
1919 DC395x_write8(acb
, TRM_S1040_SCSI_FIFO
, 0);
1920 DC395x_write8(acb
, TRM_S1040_SCSI_FIFO
, SCSI_SENSE_BUFFERSIZE
);
1921 DC395x_write8(acb
, TRM_S1040_SCSI_FIFO
, 0);
1923 srb
->state
|= SRB_COMMAND
;
1924 /* it's important for atn stop */
1925 DC395x_write16(acb
, TRM_S1040_SCSI_CONTROL
, DO_DATALATCH
);
1927 DC395x_write8(acb
, TRM_S1040_SCSI_COMMAND
, SCMD_FIFO_OUT
);
1932 * Verify that the remaining space in the hw sg lists is the same as
1933 * the count of remaining bytes in srb->total_xfer_length
1935 static void sg_verify_length(struct ScsiReqBlk
*srb
)
1937 if (debug_enabled(DBG_SG
)) {
1939 unsigned idx
= srb
->sg_index
;
1940 struct SGentry
*psge
= srb
->segment_x
+ idx
;
1941 for (; idx
< srb
->sg_count
; psge
++, idx
++)
1942 len
+= psge
->length
;
1943 if (len
!= srb
->total_xfer_length
)
1945 "Inconsistent SRB S/G lengths (Tot=%i, Count=%i) !!\n",
1946 srb
->total_xfer_length
, len
);
1952 * Compute the next Scatter Gather list index and adjust its length
1953 * and address if necessary
1955 static void sg_update_list(struct ScsiReqBlk
*srb
, u32 left
)
1958 u32 xferred
= srb
->total_xfer_length
- left
; /* bytes transferred */
1959 struct SGentry
*psge
= srb
->segment_x
+ srb
->sg_index
;
1962 "sg_update_list: Transferred %i of %i bytes, %i remain\n",
1963 xferred
, srb
->total_xfer_length
, left
);
1965 /* nothing to update since we did not transfer any data */
1969 sg_verify_length(srb
);
1970 srb
->total_xfer_length
= left
; /* update remaining count */
1971 for (idx
= srb
->sg_index
; idx
< srb
->sg_count
; idx
++) {
1972 if (xferred
>= psge
->length
) {
1973 /* Complete SG entries done */
1974 xferred
-= psge
->length
;
1976 /* Partial SG entry done */
1977 psge
->length
-= xferred
;
1978 psge
->address
+= xferred
;
1979 srb
->sg_index
= idx
;
1980 pci_dma_sync_single_for_device(srb
->dcb
->
1989 sg_verify_length(srb
);
1994 * We have transferred a single byte (PIO mode?) and need to update
1995 * the count of bytes remaining (total_xfer_length) and update the sg
1996 * entry to either point to next byte in the current sg entry, or of
1997 * already at the end to point to the start of the next sg entry
1999 static void sg_subtract_one(struct ScsiReqBlk
*srb
)
2001 sg_update_list(srb
, srb
->total_xfer_length
- 1);
2006 * cleanup_after_transfer
2008 * Makes sure, DMA and SCSI engine are empty, after the transfer has finished
2009 * KG: Currently called from StatusPhase1 ()
2010 * Should probably also be called from other places
2011 * Best might be to call it in DataXXPhase0, if new phase will differ
2013 static void cleanup_after_transfer(struct AdapterCtlBlk
*acb
,
2014 struct ScsiReqBlk
*srb
)
2016 /*DC395x_write8 (TRM_S1040_DMA_STATUS, FORCEDMACOMP); */
2017 if (DC395x_read16(acb
, TRM_S1040_DMA_COMMAND
) & 0x0001) { /* read */
2018 if (!(DC395x_read8(acb
, TRM_S1040_SCSI_FIFOCNT
) & 0x40))
2019 clear_fifo(acb
, "cleanup/in");
2020 if (!(DC395x_read8(acb
, TRM_S1040_DMA_FIFOSTAT
) & 0x80))
2021 DC395x_write8(acb
, TRM_S1040_DMA_CONTROL
, CLRXFIFO
);
2022 } else { /* write */
2023 if (!(DC395x_read8(acb
, TRM_S1040_DMA_FIFOSTAT
) & 0x80))
2024 DC395x_write8(acb
, TRM_S1040_DMA_CONTROL
, CLRXFIFO
);
2025 if (!(DC395x_read8(acb
, TRM_S1040_SCSI_FIFOCNT
) & 0x40))
2026 clear_fifo(acb
, "cleanup/out");
2028 DC395x_write16(acb
, TRM_S1040_SCSI_CONTROL
, DO_DATALATCH
);
2033 * Those no of bytes will be transferred w/ PIO through the SCSI FIFO
2034 * Seems to be needed for unknown reasons; could be a hardware bug :-(
2036 #define DC395x_LASTPIO 4
2039 static void data_out_phase0(struct AdapterCtlBlk
*acb
, struct ScsiReqBlk
*srb
,
2042 struct DeviceCtlBlk
*dcb
= srb
->dcb
;
2043 u16 scsi_status
= *pscsi_status
;
2044 u32 d_left_counter
= 0;
2045 dprintkdbg(DBG_0
, "data_out_phase0: (0x%p) <%02i-%i>\n",
2046 srb
->cmd
, srb
->cmd
->device
->id
, srb
->cmd
->device
->lun
);
2049 * KG: We need to drain the buffers before we draw any conclusions!
2050 * This means telling the DMA to push the rest into SCSI, telling
2051 * SCSI to push the rest to the bus.
2052 * However, the device might have been the one to stop us (phase
2053 * change), and the data in transit just needs to be accounted so
2054 * it can be retransmitted.)
2057 * KG: Stop DMA engine pushing more data into the SCSI FIFO
2058 * If we need more data, the DMA SG list will be freshly set up, anyway
2060 dprintkdbg(DBG_PIO
, "data_out_phase0: "
2061 "DMA{fifocnt=0x%02x fifostat=0x%02x} "
2062 "SCSI{fifocnt=0x%02x cnt=0x%06x status=0x%04x} total=0x%06x\n",
2063 DC395x_read8(acb
, TRM_S1040_DMA_FIFOCNT
),
2064 DC395x_read8(acb
, TRM_S1040_DMA_FIFOSTAT
),
2065 DC395x_read8(acb
, TRM_S1040_SCSI_FIFOCNT
),
2066 DC395x_read32(acb
, TRM_S1040_SCSI_COUNTER
), scsi_status
,
2067 srb
->total_xfer_length
);
2068 DC395x_write8(acb
, TRM_S1040_DMA_CONTROL
, STOPDMAXFER
| CLRXFIFO
);
2070 if (!(srb
->state
& SRB_XFERPAD
)) {
2071 if (scsi_status
& PARITYERROR
)
2072 srb
->status
|= PARITY_ERROR
;
2075 * KG: Right, we can't just rely on the SCSI_COUNTER, because this
2076 * is the no of bytes it got from the DMA engine not the no it
2077 * transferred successfully to the device. (And the difference could
2078 * be as much as the FIFO size, I guess ...)
2080 if (!(scsi_status
& SCSIXFERDONE
)) {
2082 * when data transfer from DMA FIFO to SCSI FIFO
2083 * if there was some data left in SCSI FIFO
2086 (u32
)(DC395x_read8(acb
, TRM_S1040_SCSI_FIFOCNT
) &
2088 if (dcb
->sync_period
& WIDE_SYNC
)
2089 d_left_counter
<<= 1;
2091 dprintkdbg(DBG_KG
, "data_out_phase0: FIFO contains %i %s\n"
2092 "SCSI{fifocnt=0x%02x cnt=0x%08x} "
2093 "DMA{fifocnt=0x%04x cnt=0x%02x ctr=0x%08x}\n",
2094 DC395x_read8(acb
, TRM_S1040_SCSI_FIFOCNT
),
2095 (dcb
->sync_period
& WIDE_SYNC
) ? "words" : "bytes",
2096 DC395x_read8(acb
, TRM_S1040_SCSI_FIFOCNT
),
2097 DC395x_read32(acb
, TRM_S1040_SCSI_COUNTER
),
2098 DC395x_read8(acb
, TRM_S1040_DMA_FIFOCNT
),
2099 DC395x_read8(acb
, TRM_S1040_DMA_FIFOSTAT
),
2100 DC395x_read32(acb
, TRM_S1040_DMA_CXCNT
));
2103 * calculate all the residue data that not yet tranfered
2104 * SCSI transfer counter + left in SCSI FIFO data
2106 * .....TRM_S1040_SCSI_COUNTER (24bits)
2107 * The counter always decrement by one for every SCSI byte transfer.
2108 * .....TRM_S1040_SCSI_FIFOCNT ( 5bits)
2109 * The counter is SCSI FIFO offset counter (in units of bytes or! words)
2111 if (srb
->total_xfer_length
> DC395x_LASTPIO
)
2113 DC395x_read32(acb
, TRM_S1040_SCSI_COUNTER
);
2115 /* Is this a good idea? */
2116 /*clear_fifo(acb, "DOP1"); */
2117 /* KG: What is this supposed to be useful for? WIDE padding stuff? */
2118 if (d_left_counter
== 1 && dcb
->sync_period
& WIDE_SYNC
2119 && scsi_bufflen(srb
->cmd
) % 2) {
2122 "data_out_phase0: Discard 1 byte (0x%02x)\n",
2126 * KG: Oops again. Same thinko as above: The SCSI might have been
2127 * faster than the DMA engine, so that it ran out of data.
2128 * In that case, we have to do just nothing!
2129 * But: Why the interrupt: No phase change. No XFERCNT_2_ZERO. Or?
2132 * KG: This is nonsense: We have been WRITING data to the bus
2133 * If the SCSI engine has no bytes left, how should the DMA engine?
2135 if (d_left_counter
== 0) {
2136 srb
->total_xfer_length
= 0;
2139 * if transfer not yet complete
2140 * there were some data residue in SCSI FIFO or
2141 * SCSI transfer counter not empty
2144 srb
->total_xfer_length
- d_left_counter
;
2146 (dcb
->sync_period
& WIDE_SYNC
) ? 2 : 1;
2147 sg_update_list(srb
, d_left_counter
);
2148 /* KG: Most ugly hack! Apparently, this works around a chip bug */
2149 if ((srb
->segment_x
[srb
->sg_index
].length
==
2150 diff
&& scsi_sg_count(srb
->cmd
))
2151 || ((oldxferred
& ~PAGE_MASK
) ==
2154 dprintkl(KERN_INFO
, "data_out_phase0: "
2155 "Work around chip bug (%i)?\n", diff
);
2157 srb
->total_xfer_length
- diff
;
2158 sg_update_list(srb
, d_left_counter
);
2159 /*srb->total_xfer_length -= diff; */
2160 /*srb->virt_addr += diff; */
2161 /*if (srb->cmd->use_sg) */
2162 /* srb->sg_index++; */
2166 if ((*pscsi_status
& PHASEMASK
) != PH_DATA_OUT
) {
2167 cleanup_after_transfer(acb
, srb
);
2172 static void data_out_phase1(struct AdapterCtlBlk
*acb
, struct ScsiReqBlk
*srb
,
2175 dprintkdbg(DBG_0
, "data_out_phase1: (0x%p) <%02i-%i>\n",
2176 srb
->cmd
, srb
->cmd
->device
->id
, srb
->cmd
->device
->lun
);
2177 clear_fifo(acb
, "data_out_phase1");
2178 /* do prepare before transfer when data out phase */
2179 data_io_transfer(acb
, srb
, XFERDATAOUT
);
2182 static void data_in_phase0(struct AdapterCtlBlk
*acb
, struct ScsiReqBlk
*srb
,
2185 u16 scsi_status
= *pscsi_status
;
2187 dprintkdbg(DBG_0
, "data_in_phase0: (0x%p) <%02i-%i>\n",
2188 srb
->cmd
, srb
->cmd
->device
->id
, srb
->cmd
->device
->lun
);
2191 * KG: DataIn is much more tricky than DataOut. When the device is finished
2192 * and switches to another phase, the SCSI engine should be finished too.
2193 * But: There might still be bytes left in its FIFO to be fetched by the DMA
2194 * engine and transferred to memory.
2195 * We should wait for the FIFOs to be emptied by that (is there any way to
2196 * enforce this?) and then stop the DMA engine, because it might think, that
2197 * there are more bytes to follow. Yes, the device might disconnect prior to
2198 * having all bytes transferred!
2199 * Also we should make sure that all data from the DMA engine buffer's really
2200 * made its way to the system memory! Some documentation on this would not
2201 * seem to be a bad idea, actually.
2203 if (!(srb
->state
& SRB_XFERPAD
)) {
2205 unsigned int sc
, fc
;
2207 if (scsi_status
& PARITYERROR
) {
2208 dprintkl(KERN_INFO
, "data_in_phase0: (0x%p) "
2209 "Parity Error\n", srb
->cmd
);
2210 srb
->status
|= PARITY_ERROR
;
2213 * KG: We should wait for the DMA FIFO to be empty ...
2214 * but: it would be better to wait first for the SCSI FIFO and then the
2215 * the DMA FIFO to become empty? How do we know, that the device not already
2216 * sent data to the FIFO in a MsgIn phase, eg.?
2218 if (!(DC395x_read8(acb
, TRM_S1040_DMA_FIFOSTAT
) & 0x80)) {
2221 dprintkl(KERN_DEBUG
,
2222 "DIP0: Wait for DMA FIFO to flush ...\n");
2223 /*DC395x_write8 (TRM_S1040_DMA_CONTROL, STOPDMAXFER); */
2224 /*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 7); */
2225 /*DC395x_write8 (TRM_S1040_SCSI_COMMAND, SCMD_DMA_IN); */
2227 (DC395x_read16(acb
, TRM_S1040_DMA_FIFOSTAT
) &
2229 if (ctr
< 6000000 - 1)
2231 "DIP0: Had to wait for DMA ...\n");
2234 "Deadlock in DIP0 waiting for DMA FIFO empty!!\n");
2235 /*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 0); */
2237 dprintkdbg(DBG_KG
, "data_in_phase0: "
2238 "DMA{fifocnt=0x%02x fifostat=0x%02x}\n",
2239 DC395x_read8(acb
, TRM_S1040_DMA_FIFOCNT
),
2240 DC395x_read8(acb
, TRM_S1040_DMA_FIFOSTAT
));
2242 /* Now: Check remainig data: The SCSI counters should tell us ... */
2243 sc
= DC395x_read32(acb
, TRM_S1040_SCSI_COUNTER
);
2244 fc
= DC395x_read8(acb
, TRM_S1040_SCSI_FIFOCNT
);
2245 d_left_counter
= sc
+ ((fc
& 0x1f)
2246 << ((srb
->dcb
->sync_period
& WIDE_SYNC
) ? 1 :
2248 dprintkdbg(DBG_KG
, "data_in_phase0: "
2249 "SCSI{fifocnt=0x%02x%s ctr=0x%08x} "
2250 "DMA{fifocnt=0x%02x fifostat=0x%02x ctr=0x%08x} "
2251 "Remain{totxfer=%i scsi_fifo+ctr=%i}\n",
2253 (srb
->dcb
->sync_period
& WIDE_SYNC
) ? "words" : "bytes",
2256 DC395x_read8(acb
, TRM_S1040_DMA_FIFOSTAT
),
2257 DC395x_read32(acb
, TRM_S1040_DMA_CXCNT
),
2258 srb
->total_xfer_length
, d_left_counter
);
2260 /* KG: Less than or equal to 4 bytes can not be transferred via DMA, it seems. */
2262 && srb
->total_xfer_length
<= DC395x_LASTPIO
) {
2263 size_t left_io
= srb
->total_xfer_length
;
2265 /*u32 addr = (srb->segment_x[srb->sg_index].address); */
2266 /*sg_update_list (srb, d_left_counter); */
2267 dprintkdbg(DBG_PIO
, "data_in_phase0: PIO (%i %s) "
2268 "for remaining %i bytes:",
2270 (srb
->dcb
->sync_period
& WIDE_SYNC
) ?
2272 srb
->total_xfer_length
);
2273 if (srb
->dcb
->sync_period
& WIDE_SYNC
)
2274 DC395x_write8(acb
, TRM_S1040_SCSI_CONFIG2
,
2277 unsigned char *virt
, *base
= NULL
;
2278 unsigned long flags
= 0;
2279 size_t len
= left_io
;
2280 size_t offset
= srb
->request_length
- left_io
;
2282 local_irq_save(flags
);
2283 /* Assumption: it's inside one page as it's at most 4 bytes and
2284 I just assume it's on a 4-byte boundary */
2285 base
= scsi_kmap_atomic_sg(scsi_sglist(srb
->cmd
),
2286 srb
->sg_count
, &offset
, &len
);
2287 virt
= base
+ offset
;
2293 byte
= DC395x_read8(acb
, TRM_S1040_SCSI_FIFO
);
2296 if (debug_enabled(DBG_PIO
))
2297 printk(" %02x", byte
);
2300 sg_subtract_one(srb
);
2304 fc
= DC395x_read8(acb
, TRM_S1040_SCSI_FIFOCNT
);
2312 WARN_ON((fc
!= 0x40) == !d_left_counter
);
2314 if (fc
== 0x40 && (srb
->dcb
->sync_period
& WIDE_SYNC
)) {
2315 /* Read the last byte ... */
2316 if (srb
->total_xfer_length
> 0) {
2317 u8 byte
= DC395x_read8(acb
, TRM_S1040_SCSI_FIFO
);
2320 srb
->total_xfer_length
--;
2321 if (debug_enabled(DBG_PIO
))
2322 printk(" %02x", byte
);
2325 DC395x_write8(acb
, TRM_S1040_SCSI_CONFIG2
, 0);
2328 scsi_kunmap_atomic_sg(base
);
2329 local_irq_restore(flags
);
2331 /*printk(" %08x", *(u32*)(bus_to_virt (addr))); */
2332 /*srb->total_xfer_length = 0; */
2333 if (debug_enabled(DBG_PIO
))
2336 #endif /* DC395x_LASTPIO */
2340 * KG: This was in DATAOUT. Does it also belong here?
2341 * Nobody seems to know what counter and fifo_cnt count exactly ...
2343 if (!(scsi_status
& SCSIXFERDONE
)) {
2345 * when data transfer from DMA FIFO to SCSI FIFO
2346 * if there was some data left in SCSI FIFO
2349 (u32
)(DC395x_read8(acb
, TRM_S1040_SCSI_FIFOCNT
) &
2351 if (srb
->dcb
->sync_period
& WIDE_SYNC
)
2352 d_left_counter
<<= 1;
2354 * if WIDE scsi SCSI FIFOCNT unit is word !!!
2356 * KG: Seems to be correct ...
2360 /* KG: This should not be needed any more! */
2361 if (d_left_counter
== 0
2362 || (scsi_status
& SCSIXFERCNT_2_ZERO
)) {
2368 DC395x_read8(acb
, TRM_S1040_DMA_STATUS
);
2369 } while (!(TempDMAstatus
& DMAXFERCOMP
) && --ctr
);
2372 "Deadlock in DataInPhase0 waiting for DMA!!\n");
2373 srb
->total_xfer_length
= 0;
2375 srb
->total_xfer_length
= d_left_counter
;
2376 } else { /* phase changed */
2379 * when a transfer not yet complete
2380 * but be disconnected by target
2381 * if transfer not yet complete
2382 * there were some data residue in SCSI FIFO or
2383 * SCSI transfer counter not empty
2385 sg_update_list(srb
, d_left_counter
);
2388 /* KG: The target may decide to disconnect: Empty FIFO before! */
2389 if ((*pscsi_status
& PHASEMASK
) != PH_DATA_IN
) {
2390 cleanup_after_transfer(acb
, srb
);
2395 static void data_in_phase1(struct AdapterCtlBlk
*acb
, struct ScsiReqBlk
*srb
,
2398 dprintkdbg(DBG_0
, "data_in_phase1: (0x%p) <%02i-%i>\n",
2399 srb
->cmd
, srb
->cmd
->device
->id
, srb
->cmd
->device
->lun
);
2400 data_io_transfer(acb
, srb
, XFERDATAIN
);
2404 static void data_io_transfer(struct AdapterCtlBlk
*acb
,
2405 struct ScsiReqBlk
*srb
, u16 io_dir
)
2407 struct DeviceCtlBlk
*dcb
= srb
->dcb
;
2410 "data_io_transfer: (0x%p) <%02i-%i> %c len=%i, sg=(%i/%i)\n",
2411 srb
->cmd
, srb
->cmd
->device
->id
, srb
->cmd
->device
->lun
,
2412 ((io_dir
& DMACMD_DIR
) ? 'r' : 'w'),
2413 srb
->total_xfer_length
, srb
->sg_index
, srb
->sg_count
);
2414 if (srb
== acb
->tmp_srb
)
2415 dprintkl(KERN_ERR
, "data_io_transfer: Using tmp_srb!\n");
2416 if (srb
->sg_index
>= srb
->sg_count
) {
2417 /* can't happen? out of bounds error */
2421 if (srb
->total_xfer_length
> DC395x_LASTPIO
) {
2422 u8 dma_status
= DC395x_read8(acb
, TRM_S1040_DMA_STATUS
);
2424 * KG: What should we do: Use SCSI Cmd 0x90/0x92?
2425 * Maybe, even ABORTXFER would be appropriate
2427 if (dma_status
& XFERPENDING
) {
2428 dprintkl(KERN_DEBUG
, "data_io_transfer: Xfer pending! "
2429 "Expect trouble!\n");
2430 dump_register_info(acb
, dcb
, srb
);
2431 DC395x_write8(acb
, TRM_S1040_DMA_CONTROL
, CLRXFIFO
);
2433 /* clear_fifo(acb, "IO"); */
2435 * load what physical address of Scatter/Gather list table
2436 * want to be transfer
2438 srb
->state
|= SRB_DATA_XFER
;
2439 DC395x_write32(acb
, TRM_S1040_DMA_XHIGHADDR
, 0);
2440 if (scsi_sg_count(srb
->cmd
)) { /* with S/G */
2441 io_dir
|= DMACMD_SG
;
2442 DC395x_write32(acb
, TRM_S1040_DMA_XLOWADDR
,
2444 sizeof(struct SGentry
) *
2446 /* load how many bytes in the sg list table */
2447 DC395x_write32(acb
, TRM_S1040_DMA_XCNT
,
2448 ((u32
)(srb
->sg_count
-
2449 srb
->sg_index
) << 3));
2450 } else { /* without S/G */
2451 io_dir
&= ~DMACMD_SG
;
2452 DC395x_write32(acb
, TRM_S1040_DMA_XLOWADDR
,
2453 srb
->segment_x
[0].address
);
2454 DC395x_write32(acb
, TRM_S1040_DMA_XCNT
,
2455 srb
->segment_x
[0].length
);
2457 /* load total transfer length (24bits) max value 16Mbyte */
2458 DC395x_write32(acb
, TRM_S1040_SCSI_COUNTER
,
2459 srb
->total_xfer_length
);
2460 DC395x_write16(acb
, TRM_S1040_SCSI_CONTROL
, DO_DATALATCH
); /* it's important for atn stop */
2461 if (io_dir
& DMACMD_DIR
) { /* read */
2462 DC395x_write8(acb
, TRM_S1040_SCSI_COMMAND
,
2464 DC395x_write16(acb
, TRM_S1040_DMA_COMMAND
, io_dir
);
2466 DC395x_write16(acb
, TRM_S1040_DMA_COMMAND
, io_dir
);
2467 DC395x_write8(acb
, TRM_S1040_SCSI_COMMAND
,
2473 else if (srb
->total_xfer_length
> 0) { /* The last four bytes: Do PIO */
2475 * load what physical address of Scatter/Gather list table
2476 * want to be transfer
2478 srb
->state
|= SRB_DATA_XFER
;
2479 /* load total transfer length (24bits) max value 16Mbyte */
2480 DC395x_write32(acb
, TRM_S1040_SCSI_COUNTER
,
2481 srb
->total_xfer_length
);
2482 DC395x_write16(acb
, TRM_S1040_SCSI_CONTROL
, DO_DATALATCH
); /* it's important for atn stop */
2483 if (io_dir
& DMACMD_DIR
) { /* read */
2484 DC395x_write8(acb
, TRM_S1040_SCSI_COMMAND
,
2486 } else { /* write */
2487 int ln
= srb
->total_xfer_length
;
2488 size_t left_io
= srb
->total_xfer_length
;
2490 if (srb
->dcb
->sync_period
& WIDE_SYNC
)
2491 DC395x_write8(acb
, TRM_S1040_SCSI_CONFIG2
,
2495 unsigned char *virt
, *base
= NULL
;
2496 unsigned long flags
= 0;
2497 size_t len
= left_io
;
2498 size_t offset
= srb
->request_length
- left_io
;
2500 local_irq_save(flags
);
2501 /* Again, max 4 bytes */
2502 base
= scsi_kmap_atomic_sg(scsi_sglist(srb
->cmd
),
2503 srb
->sg_count
, &offset
, &len
);
2504 virt
= base
+ offset
;
2509 if (debug_enabled(DBG_PIO
))
2510 printk(" %02x", *virt
);
2512 DC395x_write8(acb
, TRM_S1040_SCSI_FIFO
, *virt
++);
2514 sg_subtract_one(srb
);
2517 scsi_kunmap_atomic_sg(base
);
2518 local_irq_restore(flags
);
2520 if (srb
->dcb
->sync_period
& WIDE_SYNC
) {
2522 DC395x_write8(acb
, TRM_S1040_SCSI_FIFO
, 0);
2523 if (debug_enabled(DBG_PIO
))
2526 DC395x_write8(acb
, TRM_S1040_SCSI_CONFIG2
, 0);
2528 /*DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, ln); */
2529 if (debug_enabled(DBG_PIO
))
2531 DC395x_write8(acb
, TRM_S1040_SCSI_COMMAND
,
2535 #endif /* DC395x_LASTPIO */
2536 else { /* xfer pad */
2537 u8 data
= 0, data2
= 0;
2538 if (srb
->sg_count
) {
2539 srb
->adapter_status
= H_OVER_UNDER_RUN
;
2540 srb
->status
|= OVER_RUN
;
2543 * KG: despite the fact that we are using 16 bits I/O ops
2544 * the SCSI FIFO is only 8 bits according to the docs
2545 * (we can set bit 1 in 0x8f to serialize FIFO access ...)
2547 if (dcb
->sync_period
& WIDE_SYNC
) {
2548 DC395x_write32(acb
, TRM_S1040_SCSI_COUNTER
, 2);
2549 DC395x_write8(acb
, TRM_S1040_SCSI_CONFIG2
,
2551 if (io_dir
& DMACMD_DIR
) {
2552 data
= DC395x_read8(acb
, TRM_S1040_SCSI_FIFO
);
2553 data2
= DC395x_read8(acb
, TRM_S1040_SCSI_FIFO
);
2555 /* Danger, Robinson: If you find KGs
2556 * scattered over the wide disk, the driver
2557 * or chip is to blame :-( */
2558 DC395x_write8(acb
, TRM_S1040_SCSI_FIFO
, 'K');
2559 DC395x_write8(acb
, TRM_S1040_SCSI_FIFO
, 'G');
2561 DC395x_write8(acb
, TRM_S1040_SCSI_CONFIG2
, 0);
2563 DC395x_write32(acb
, TRM_S1040_SCSI_COUNTER
, 1);
2564 /* Danger, Robinson: If you find a collection of Ks on your disk
2565 * something broke :-( */
2566 if (io_dir
& DMACMD_DIR
)
2567 data
= DC395x_read8(acb
, TRM_S1040_SCSI_FIFO
);
2569 DC395x_write8(acb
, TRM_S1040_SCSI_FIFO
, 'K');
2571 srb
->state
|= SRB_XFERPAD
;
2572 DC395x_write16(acb
, TRM_S1040_SCSI_CONTROL
, DO_DATALATCH
); /* it's important for atn stop */
2574 bval
= (io_dir
& DMACMD_DIR
) ? SCMD_FIFO_IN
: SCMD_FIFO_OUT
;
2575 DC395x_write8(acb
, TRM_S1040_SCSI_COMMAND
, bval
);
2580 static void status_phase0(struct AdapterCtlBlk
*acb
, struct ScsiReqBlk
*srb
,
2583 dprintkdbg(DBG_0
, "status_phase0: (0x%p) <%02i-%i>\n",
2584 srb
->cmd
, srb
->cmd
->device
->id
, srb
->cmd
->device
->lun
);
2585 srb
->target_status
= DC395x_read8(acb
, TRM_S1040_SCSI_FIFO
);
2586 srb
->end_message
= DC395x_read8(acb
, TRM_S1040_SCSI_FIFO
); /* get message */
2587 srb
->state
= SRB_COMPLETED
;
2588 *pscsi_status
= PH_BUS_FREE
; /*.. initial phase */
2589 DC395x_write16(acb
, TRM_S1040_SCSI_CONTROL
, DO_DATALATCH
); /* it's important for atn stop */
2590 DC395x_write8(acb
, TRM_S1040_SCSI_COMMAND
, SCMD_MSGACCEPT
);
2594 static void status_phase1(struct AdapterCtlBlk
*acb
, struct ScsiReqBlk
*srb
,
2597 dprintkdbg(DBG_0
, "status_phase1: (0x%p) <%02i-%i>\n",
2598 srb
->cmd
, srb
->cmd
->device
->id
, srb
->cmd
->device
->lun
);
2599 srb
->state
= SRB_STATUS
;
2600 DC395x_write16(acb
, TRM_S1040_SCSI_CONTROL
, DO_DATALATCH
); /* it's important for atn stop */
2601 DC395x_write8(acb
, TRM_S1040_SCSI_COMMAND
, SCMD_COMP
);
2605 /* Check if the message is complete */
2606 static inline u8
msgin_completed(u8
* msgbuf
, u32 len
)
2608 if (*msgbuf
== EXTENDED_MESSAGE
) {
2611 if (len
< msgbuf
[1] + 2)
2613 } else if (*msgbuf
>= 0x20 && *msgbuf
<= 0x2f) /* two byte messages */
2620 static inline void msgin_reject(struct AdapterCtlBlk
*acb
,
2621 struct ScsiReqBlk
*srb
)
2623 srb
->msgout_buf
[0] = MESSAGE_REJECT
;
2625 DC395x_ENABLE_MSGOUT
;
2626 srb
->state
&= ~SRB_MSGIN
;
2627 srb
->state
|= SRB_MSGOUT
;
2628 dprintkl(KERN_INFO
, "msgin_reject: 0x%02x <%02i-%i>\n",
2630 srb
->dcb
->target_id
, srb
->dcb
->target_lun
);
2634 static struct ScsiReqBlk
*msgin_qtag(struct AdapterCtlBlk
*acb
,
2635 struct DeviceCtlBlk
*dcb
, u8 tag
)
2637 struct ScsiReqBlk
*srb
= NULL
;
2638 struct ScsiReqBlk
*i
;
2639 dprintkdbg(DBG_0
, "msgin_qtag: (0x%p) tag=%i srb=%p\n",
2640 srb
->cmd
, tag
, srb
);
2642 if (!(dcb
->tag_mask
& (1 << tag
)))
2643 dprintkl(KERN_DEBUG
,
2644 "msgin_qtag: tag_mask=0x%08x does not reserve tag %i!\n",
2645 dcb
->tag_mask
, tag
);
2647 if (list_empty(&dcb
->srb_going_list
))
2649 list_for_each_entry(i
, &dcb
->srb_going_list
, list
) {
2650 if (i
->tag_number
== tag
) {
2658 dprintkdbg(DBG_0
, "msgin_qtag: (0x%p) <%02i-%i>\n",
2659 srb
->cmd
, srb
->dcb
->target_id
, srb
->dcb
->target_lun
);
2660 if (dcb
->flag
& ABORT_DEV_
) {
2661 /*srb->state = SRB_ABORT_SENT; */
2662 enable_msgout_abort(acb
, srb
);
2665 if (!(srb
->state
& SRB_DISCONNECT
))
2668 memcpy(srb
->msgin_buf
, dcb
->active_srb
->msgin_buf
, acb
->msg_len
);
2669 srb
->state
|= dcb
->active_srb
->state
;
2670 srb
->state
|= SRB_DATA_XFER
;
2671 dcb
->active_srb
= srb
;
2672 /* How can we make the DORS happy? */
2677 srb
->state
= SRB_UNEXPECT_RESEL
;
2678 dcb
->active_srb
= srb
;
2679 srb
->msgout_buf
[0] = MSG_ABORT_TAG
;
2681 DC395x_ENABLE_MSGOUT
;
2682 dprintkl(KERN_DEBUG
, "msgin_qtag: Unknown tag %i - abort\n", tag
);
2687 static inline void reprogram_regs(struct AdapterCtlBlk
*acb
,
2688 struct DeviceCtlBlk
*dcb
)
2690 DC395x_write8(acb
, TRM_S1040_SCSI_TARGETID
, dcb
->target_id
);
2691 DC395x_write8(acb
, TRM_S1040_SCSI_SYNC
, dcb
->sync_period
);
2692 DC395x_write8(acb
, TRM_S1040_SCSI_OFFSET
, dcb
->sync_offset
);
2693 set_xfer_rate(acb
, dcb
);
2697 /* set async transfer mode */
2698 static void msgin_set_async(struct AdapterCtlBlk
*acb
, struct ScsiReqBlk
*srb
)
2700 struct DeviceCtlBlk
*dcb
= srb
->dcb
;
2701 dprintkl(KERN_DEBUG
, "msgin_set_async: No sync transfers <%02i-%i>\n",
2702 dcb
->target_id
, dcb
->target_lun
);
2704 dcb
->sync_mode
&= ~(SYNC_NEGO_ENABLE
);
2705 dcb
->sync_mode
|= SYNC_NEGO_DONE
;
2706 /*dcb->sync_period &= 0; */
2707 dcb
->sync_offset
= 0;
2708 dcb
->min_nego_period
= 200 >> 2; /* 200ns <=> 5 MHz */
2709 srb
->state
&= ~SRB_DO_SYNC_NEGO
;
2710 reprogram_regs(acb
, dcb
);
2711 if ((dcb
->sync_mode
& WIDE_NEGO_ENABLE
)
2712 && !(dcb
->sync_mode
& WIDE_NEGO_DONE
)) {
2713 build_wdtr(acb
, dcb
, srb
);
2714 DC395x_ENABLE_MSGOUT
;
2715 dprintkdbg(DBG_0
, "msgin_set_async(rej): Try WDTR anyway\n");
2720 /* set sync transfer mode */
2721 static void msgin_set_sync(struct AdapterCtlBlk
*acb
, struct ScsiReqBlk
*srb
)
2723 struct DeviceCtlBlk
*dcb
= srb
->dcb
;
2726 dprintkdbg(DBG_1
, "msgin_set_sync: <%02i> Sync: %ins "
2727 "(%02i.%01i MHz) Offset %i\n",
2728 dcb
->target_id
, srb
->msgin_buf
[3] << 2,
2729 (250 / srb
->msgin_buf
[3]),
2730 ((250 % srb
->msgin_buf
[3]) * 10) / srb
->msgin_buf
[3],
2733 if (srb
->msgin_buf
[4] > 15)
2734 srb
->msgin_buf
[4] = 15;
2735 if (!(dcb
->dev_mode
& NTC_DO_SYNC_NEGO
))
2736 dcb
->sync_offset
= 0;
2737 else if (dcb
->sync_offset
== 0)
2738 dcb
->sync_offset
= srb
->msgin_buf
[4];
2739 if (srb
->msgin_buf
[4] > dcb
->sync_offset
)
2740 srb
->msgin_buf
[4] = dcb
->sync_offset
;
2742 dcb
->sync_offset
= srb
->msgin_buf
[4];
2744 while (bval
< 7 && (srb
->msgin_buf
[3] > clock_period
[bval
]
2745 || dcb
->min_nego_period
>
2746 clock_period
[bval
]))
2748 if (srb
->msgin_buf
[3] < clock_period
[bval
])
2750 "msgin_set_sync: Increase sync nego period to %ins\n",
2751 clock_period
[bval
] << 2);
2752 srb
->msgin_buf
[3] = clock_period
[bval
];
2753 dcb
->sync_period
&= 0xf0;
2754 dcb
->sync_period
|= ALT_SYNC
| bval
;
2755 dcb
->min_nego_period
= srb
->msgin_buf
[3];
2757 if (dcb
->sync_period
& WIDE_SYNC
)
2763 "Target %02i: %s Sync: %ins Offset %i (%02i.%01i MB/s)\n",
2764 dcb
->target_id
, (fact
== 500) ? "Wide16" : "",
2765 dcb
->min_nego_period
<< 2, dcb
->sync_offset
,
2766 (fact
/ dcb
->min_nego_period
),
2767 ((fact
% dcb
->min_nego_period
) * 10 +
2768 dcb
->min_nego_period
/ 2) / dcb
->min_nego_period
);
2770 if (!(srb
->state
& SRB_DO_SYNC_NEGO
)) {
2771 /* Reply with corrected SDTR Message */
2772 dprintkl(KERN_DEBUG
, "msgin_set_sync: answer w/%ins %i\n",
2773 srb
->msgin_buf
[3] << 2, srb
->msgin_buf
[4]);
2775 memcpy(srb
->msgout_buf
, srb
->msgin_buf
, 5);
2777 DC395x_ENABLE_MSGOUT
;
2778 dcb
->sync_mode
|= SYNC_NEGO_DONE
;
2780 if ((dcb
->sync_mode
& WIDE_NEGO_ENABLE
)
2781 && !(dcb
->sync_mode
& WIDE_NEGO_DONE
)) {
2782 build_wdtr(acb
, dcb
, srb
);
2783 DC395x_ENABLE_MSGOUT
;
2784 dprintkdbg(DBG_0
, "msgin_set_sync: Also try WDTR\n");
2787 srb
->state
&= ~SRB_DO_SYNC_NEGO
;
2788 dcb
->sync_mode
|= SYNC_NEGO_DONE
| SYNC_NEGO_ENABLE
;
2790 reprogram_regs(acb
, dcb
);
2794 static inline void msgin_set_nowide(struct AdapterCtlBlk
*acb
,
2795 struct ScsiReqBlk
*srb
)
2797 struct DeviceCtlBlk
*dcb
= srb
->dcb
;
2798 dprintkdbg(DBG_1
, "msgin_set_nowide: <%02i>\n", dcb
->target_id
);
2800 dcb
->sync_period
&= ~WIDE_SYNC
;
2801 dcb
->sync_mode
&= ~(WIDE_NEGO_ENABLE
);
2802 dcb
->sync_mode
|= WIDE_NEGO_DONE
;
2803 srb
->state
&= ~SRB_DO_WIDE_NEGO
;
2804 reprogram_regs(acb
, dcb
);
2805 if ((dcb
->sync_mode
& SYNC_NEGO_ENABLE
)
2806 && !(dcb
->sync_mode
& SYNC_NEGO_DONE
)) {
2807 build_sdtr(acb
, dcb
, srb
);
2808 DC395x_ENABLE_MSGOUT
;
2809 dprintkdbg(DBG_0
, "msgin_set_nowide: Rejected. Try SDTR anyway\n");
2813 static void msgin_set_wide(struct AdapterCtlBlk
*acb
, struct ScsiReqBlk
*srb
)
2815 struct DeviceCtlBlk
*dcb
= srb
->dcb
;
2816 u8 wide
= (dcb
->dev_mode
& NTC_DO_WIDE_NEGO
2817 && acb
->config
& HCC_WIDE_CARD
) ? 1 : 0;
2818 dprintkdbg(DBG_1
, "msgin_set_wide: <%02i>\n", dcb
->target_id
);
2820 if (srb
->msgin_buf
[3] > wide
)
2821 srb
->msgin_buf
[3] = wide
;
2823 if (!(srb
->state
& SRB_DO_WIDE_NEGO
)) {
2824 dprintkl(KERN_DEBUG
,
2825 "msgin_set_wide: Wide nego initiated <%02i>\n",
2827 memcpy(srb
->msgout_buf
, srb
->msgin_buf
, 4);
2829 srb
->state
|= SRB_DO_WIDE_NEGO
;
2830 DC395x_ENABLE_MSGOUT
;
2833 dcb
->sync_mode
|= (WIDE_NEGO_ENABLE
| WIDE_NEGO_DONE
);
2834 if (srb
->msgin_buf
[3] > 0)
2835 dcb
->sync_period
|= WIDE_SYNC
;
2837 dcb
->sync_period
&= ~WIDE_SYNC
;
2838 srb
->state
&= ~SRB_DO_WIDE_NEGO
;
2839 /*dcb->sync_mode &= ~(WIDE_NEGO_ENABLE+WIDE_NEGO_DONE); */
2841 "msgin_set_wide: Wide (%i bit) negotiated <%02i>\n",
2842 (8 << srb
->msgin_buf
[3]), dcb
->target_id
);
2843 reprogram_regs(acb
, dcb
);
2844 if ((dcb
->sync_mode
& SYNC_NEGO_ENABLE
)
2845 && !(dcb
->sync_mode
& SYNC_NEGO_DONE
)) {
2846 build_sdtr(acb
, dcb
, srb
);
2847 DC395x_ENABLE_MSGOUT
;
2848 dprintkdbg(DBG_0
, "msgin_set_wide: Also try SDTR.\n");
2854 * extended message codes:
2859 * 00h MODIFY DATA POINTER
2860 * 01h SYNCHRONOUS DATA TRANSFER REQUEST
2861 * 03h WIDE DATA TRANSFER REQUEST
2862 * 04h - 7Fh Reserved
2863 * 80h - FFh Vendor specific
2865 static void msgin_phase0(struct AdapterCtlBlk
*acb
, struct ScsiReqBlk
*srb
,
2868 struct DeviceCtlBlk
*dcb
= acb
->active_dcb
;
2869 dprintkdbg(DBG_0
, "msgin_phase0: (0x%p)\n", srb
->cmd
);
2871 srb
->msgin_buf
[acb
->msg_len
++] = DC395x_read8(acb
, TRM_S1040_SCSI_FIFO
);
2872 if (msgin_completed(srb
->msgin_buf
, acb
->msg_len
)) {
2873 /* Now eval the msg */
2874 switch (srb
->msgin_buf
[0]) {
2876 srb
->state
= SRB_DISCONNECT
;
2879 case SIMPLE_QUEUE_TAG
:
2880 case HEAD_OF_QUEUE_TAG
:
2881 case ORDERED_QUEUE_TAG
:
2883 msgin_qtag(acb
, dcb
,
2887 case MESSAGE_REJECT
:
2888 DC395x_write16(acb
, TRM_S1040_SCSI_CONTROL
,
2889 DO_CLRATN
| DO_DATALATCH
);
2890 /* A sync nego message was rejected ! */
2891 if (srb
->state
& SRB_DO_SYNC_NEGO
) {
2892 msgin_set_async(acb
, srb
);
2895 /* A wide nego message was rejected ! */
2896 if (srb
->state
& SRB_DO_WIDE_NEGO
) {
2897 msgin_set_nowide(acb
, srb
);
2900 enable_msgout_abort(acb
, srb
);
2901 /*srb->state |= SRB_ABORT_SENT */
2904 case EXTENDED_MESSAGE
:
2906 if (srb
->msgin_buf
[1] == 3
2907 && srb
->msgin_buf
[2] == EXTENDED_SDTR
) {
2908 msgin_set_sync(acb
, srb
);
2912 if (srb
->msgin_buf
[1] == 2
2913 && srb
->msgin_buf
[2] == EXTENDED_WDTR
2914 && srb
->msgin_buf
[3] <= 2) { /* sanity check ... */
2915 msgin_set_wide(acb
, srb
);
2918 msgin_reject(acb
, srb
);
2921 case MSG_IGNOREWIDE
:
2922 /* Discard wide residual */
2923 dprintkdbg(DBG_0
, "msgin_phase0: Ignore Wide Residual!\n");
2926 case COMMAND_COMPLETE
:
2927 /* nothing has to be done */
2932 * SAVE POINTER may be ignored as we have the struct
2933 * ScsiReqBlk* associated with the scsi command.
2935 dprintkdbg(DBG_0
, "msgin_phase0: (0x%p) "
2936 "SAVE POINTER rem=%i Ignore\n",
2937 srb
->cmd
, srb
->total_xfer_length
);
2940 case RESTORE_POINTERS
:
2941 dprintkdbg(DBG_0
, "msgin_phase0: RESTORE POINTER. Ignore\n");
2945 dprintkdbg(DBG_0
, "msgin_phase0: (0x%p) "
2946 "<%02i-%i> ABORT msg\n",
2947 srb
->cmd
, dcb
->target_id
,
2949 dcb
->flag
|= ABORT_DEV_
;
2950 enable_msgout_abort(acb
, srb
);
2954 /* reject unknown messages */
2955 if (srb
->msgin_buf
[0] & IDENTIFY_BASE
) {
2956 dprintkdbg(DBG_0
, "msgin_phase0: Identify msg\n");
2958 srb
->msgout_buf
[0] = dcb
->identify_msg
;
2959 DC395x_ENABLE_MSGOUT
;
2960 srb
->state
|= SRB_MSGOUT
;
2963 msgin_reject(acb
, srb
);
2966 /* Clear counter and MsgIn state */
2967 srb
->state
&= ~SRB_MSGIN
;
2970 *pscsi_status
= PH_BUS_FREE
;
2971 DC395x_write16(acb
, TRM_S1040_SCSI_CONTROL
, DO_DATALATCH
); /* it's important ... you know! */
2972 DC395x_write8(acb
, TRM_S1040_SCSI_COMMAND
, SCMD_MSGACCEPT
);
2976 static void msgin_phase1(struct AdapterCtlBlk
*acb
, struct ScsiReqBlk
*srb
,
2979 dprintkdbg(DBG_0
, "msgin_phase1: (0x%p)\n", srb
->cmd
);
2980 clear_fifo(acb
, "msgin_phase1");
2981 DC395x_write32(acb
, TRM_S1040_SCSI_COUNTER
, 1);
2982 if (!(srb
->state
& SRB_MSGIN
)) {
2983 srb
->state
&= ~SRB_DISCONNECT
;
2984 srb
->state
|= SRB_MSGIN
;
2986 DC395x_write16(acb
, TRM_S1040_SCSI_CONTROL
, DO_DATALATCH
); /* it's important for atn stop */
2988 DC395x_write8(acb
, TRM_S1040_SCSI_COMMAND
, SCMD_FIFO_IN
);
2992 static void nop0(struct AdapterCtlBlk
*acb
, struct ScsiReqBlk
*srb
,
2998 static void nop1(struct AdapterCtlBlk
*acb
, struct ScsiReqBlk
*srb
,
3004 static void set_xfer_rate(struct AdapterCtlBlk
*acb
, struct DeviceCtlBlk
*dcb
)
3006 struct DeviceCtlBlk
*i
;
3008 /* set all lun device's period, offset */
3009 if (dcb
->identify_msg
& 0x07)
3012 if (acb
->scan_devices
) {
3013 current_sync_offset
= dcb
->sync_offset
;
3017 list_for_each_entry(i
, &acb
->dcb_list
, list
)
3018 if (i
->target_id
== dcb
->target_id
) {
3019 i
->sync_period
= dcb
->sync_period
;
3020 i
->sync_offset
= dcb
->sync_offset
;
3021 i
->sync_mode
= dcb
->sync_mode
;
3022 i
->min_nego_period
= dcb
->min_nego_period
;
3027 static void disconnect(struct AdapterCtlBlk
*acb
)
3029 struct DeviceCtlBlk
*dcb
= acb
->active_dcb
;
3030 struct ScsiReqBlk
*srb
;
3033 dprintkl(KERN_ERR
, "disconnect: No such device\n");
3035 /* Suspend queue for a while */
3038 HZ
* acb
->eeprom
.delay_time
;
3039 clear_fifo(acb
, "disconnectEx");
3040 DC395x_write16(acb
, TRM_S1040_SCSI_CONTROL
, DO_HWRESELECT
);
3043 srb
= dcb
->active_srb
;
3044 acb
->active_dcb
= NULL
;
3045 dprintkdbg(DBG_0
, "disconnect: (0x%p)\n", srb
->cmd
);
3047 srb
->scsi_phase
= PH_BUS_FREE
; /* initial phase */
3048 clear_fifo(acb
, "disconnect");
3049 DC395x_write16(acb
, TRM_S1040_SCSI_CONTROL
, DO_HWRESELECT
);
3050 if (srb
->state
& SRB_UNEXPECT_RESEL
) {
3052 "disconnect: Unexpected reselection <%02i-%i>\n",
3053 dcb
->target_id
, dcb
->target_lun
);
3055 waiting_process_next(acb
);
3056 } else if (srb
->state
& SRB_ABORT_SENT
) {
3057 dcb
->flag
&= ~ABORT_DEV_
;
3058 acb
->last_reset
= jiffies
+ HZ
/ 2 + 1;
3059 dprintkl(KERN_ERR
, "disconnect: SRB_ABORT_SENT\n");
3060 doing_srb_done(acb
, DID_ABORT
, srb
->cmd
, 1);
3061 waiting_process_next(acb
);
3063 if ((srb
->state
& (SRB_START_
+ SRB_MSGOUT
))
3065 state
& (SRB_DISCONNECT
+ SRB_COMPLETED
))) {
3067 * Selection time out
3068 * SRB_START_ || SRB_MSGOUT || (!SRB_DISCONNECT && !SRB_COMPLETED)
3070 /* Unexp. Disc / Sel Timeout */
3071 if (srb
->state
!= SRB_START_
3072 && srb
->state
!= SRB_MSGOUT
) {
3073 srb
->state
= SRB_READY
;
3074 dprintkl(KERN_DEBUG
,
3075 "disconnect: (0x%p) Unexpected\n",
3077 srb
->target_status
= SCSI_STAT_SEL_TIMEOUT
;
3080 /* Normal selection timeout */
3081 dprintkdbg(DBG_KG
, "disconnect: (0x%p) "
3082 "<%02i-%i> SelTO\n", srb
->cmd
,
3083 dcb
->target_id
, dcb
->target_lun
);
3084 if (srb
->retry_count
++ > DC395x_MAX_RETRIES
3085 || acb
->scan_devices
) {
3086 srb
->target_status
=
3087 SCSI_STAT_SEL_TIMEOUT
;
3091 srb_going_to_waiting_move(dcb
, srb
);
3093 "disconnect: (0x%p) Retry\n",
3095 waiting_set_timer(acb
, HZ
/ 20);
3097 } else if (srb
->state
& SRB_DISCONNECT
) {
3098 u8 bval
= DC395x_read8(acb
, TRM_S1040_SCSI_SIGNAL
);
3100 * SRB_DISCONNECT (This is what we expect!)
3103 dprintkdbg(DBG_0
, "disconnect: SCSI bus stat "
3104 " 0x%02x: ACK set! Other controllers?\n",
3106 /* It could come from another initiator, therefore don't do much ! */
3108 waiting_process_next(acb
);
3109 } else if (srb
->state
& SRB_COMPLETED
) {
3115 dcb
->active_srb
= NULL
;
3116 srb
->state
= SRB_FREE
;
3117 srb_done(acb
, dcb
, srb
);
3123 static void reselect(struct AdapterCtlBlk
*acb
)
3125 struct DeviceCtlBlk
*dcb
= acb
->active_dcb
;
3126 struct ScsiReqBlk
*srb
= NULL
;
3127 u16 rsel_tar_lun_id
;
3130 dprintkdbg(DBG_0
, "reselect: acb=%p\n", acb
);
3132 clear_fifo(acb
, "reselect");
3133 /*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT | DO_DATALATCH); */
3134 /* Read Reselected Target ID and LUN */
3135 rsel_tar_lun_id
= DC395x_read16(acb
, TRM_S1040_SCSI_TARGETID
);
3136 if (dcb
) { /* Arbitration lost but Reselection win */
3137 srb
= dcb
->active_srb
;
3139 dprintkl(KERN_DEBUG
, "reselect: Arb lost Resel won, "
3140 "but active_srb == NULL\n");
3141 DC395x_write16(acb
, TRM_S1040_SCSI_CONTROL
, DO_DATALATCH
); /* it's important for atn stop */
3145 if (!acb
->scan_devices
) {
3146 dprintkdbg(DBG_KG
, "reselect: (0x%p) <%02i-%i> "
3147 "Arb lost but Resel win rsel=%i stat=0x%04x\n",
3148 srb
->cmd
, dcb
->target_id
,
3149 dcb
->target_lun
, rsel_tar_lun_id
,
3150 DC395x_read16(acb
, TRM_S1040_SCSI_STATUS
));
3152 /*srb->state |= SRB_DISCONNECT; */
3154 srb
->state
= SRB_READY
;
3156 srb_going_to_waiting_move(dcb
, srb
);
3157 waiting_set_timer(acb
, HZ
/ 20);
3162 /* Read Reselected Target Id and LUN */
3163 if (!(rsel_tar_lun_id
& (IDENTIFY_BASE
<< 8)))
3164 dprintkl(KERN_DEBUG
, "reselect: Expects identify msg. "
3165 "Got %i!\n", rsel_tar_lun_id
);
3166 id
= rsel_tar_lun_id
& 0xff;
3167 lun
= (rsel_tar_lun_id
>> 8) & 7;
3168 dcb
= find_dcb(acb
, id
, lun
);
3170 dprintkl(KERN_ERR
, "reselect: From non existent device "
3171 "<%02i-%i>\n", id
, lun
);
3172 DC395x_write16(acb
, TRM_S1040_SCSI_CONTROL
, DO_DATALATCH
); /* it's important for atn stop */
3175 acb
->active_dcb
= dcb
;
3177 if (!(dcb
->dev_mode
& NTC_DO_DISCONNECT
))
3178 dprintkl(KERN_DEBUG
, "reselect: in spite of forbidden "
3179 "disconnection? <%02i-%i>\n",
3180 dcb
->target_id
, dcb
->target_lun
);
3182 if (dcb
->sync_mode
& EN_TAG_QUEUEING
/*&& !arblostflag */) {
3184 dcb
->active_srb
= srb
;
3186 /* There can be only one! */
3187 srb
= dcb
->active_srb
;
3188 if (!srb
|| !(srb
->state
& SRB_DISCONNECT
)) {
3192 dprintkl(KERN_DEBUG
,
3193 "reselect: w/o disconnected cmds <%02i-%i>\n",
3194 dcb
->target_id
, dcb
->target_lun
);
3196 srb
->state
= SRB_UNEXPECT_RESEL
;
3197 dcb
->active_srb
= srb
;
3198 enable_msgout_abort(acb
, srb
);
3200 if (dcb
->flag
& ABORT_DEV_
) {
3201 /*srb->state = SRB_ABORT_SENT; */
3202 enable_msgout_abort(acb
, srb
);
3204 srb
->state
= SRB_DATA_XFER
;
3208 srb
->scsi_phase
= PH_BUS_FREE
; /* initial phase */
3210 /* Program HA ID, target ID, period and offset */
3211 dprintkdbg(DBG_0
, "reselect: select <%i>\n", dcb
->target_id
);
3212 DC395x_write8(acb
, TRM_S1040_SCSI_HOSTID
, acb
->scsi_host
->this_id
); /* host ID */
3213 DC395x_write8(acb
, TRM_S1040_SCSI_TARGETID
, dcb
->target_id
); /* target ID */
3214 DC395x_write8(acb
, TRM_S1040_SCSI_OFFSET
, dcb
->sync_offset
); /* offset */
3215 DC395x_write8(acb
, TRM_S1040_SCSI_SYNC
, dcb
->sync_period
); /* sync period, wide */
3216 DC395x_write16(acb
, TRM_S1040_SCSI_CONTROL
, DO_DATALATCH
); /* it's important for atn stop */
3218 DC395x_write8(acb
, TRM_S1040_SCSI_COMMAND
, SCMD_MSGACCEPT
);
3222 static inline u8
tagq_blacklist(char *name
)
3224 #ifndef DC395x_NO_TAGQ
3227 for (i
= 0; i
< BADDEVCNT
; i
++)
3228 if (memcmp(name
, DC395x_baddevname1
[i
], 28) == 0)
3238 static void disc_tagq_set(struct DeviceCtlBlk
*dcb
, struct ScsiInqData
*ptr
)
3240 /* Check for SCSI format (ANSI and Response data format) */
3241 if ((ptr
->Vers
& 0x07) >= 2 || (ptr
->RDF
& 0x0F) == 2) {
3242 if ((ptr
->Flags
& SCSI_INQ_CMDQUEUE
)
3243 && (dcb
->dev_mode
& NTC_DO_TAG_QUEUEING
) &&
3244 /*(dcb->dev_mode & NTC_DO_DISCONNECT) */
3245 /* ((dcb->dev_type == TYPE_DISK)
3246 || (dcb->dev_type == TYPE_MOD)) && */
3247 !tagq_blacklist(((char *)ptr
) + 8)) {
3248 if (dcb
->max_command
== 1)
3250 dcb
->acb
->tag_max_num
;
3251 dcb
->sync_mode
|= EN_TAG_QUEUEING
;
3252 /*dcb->tag_mask = 0; */
3254 dcb
->max_command
= 1;
3259 static void add_dev(struct AdapterCtlBlk
*acb
, struct DeviceCtlBlk
*dcb
,
3260 struct ScsiInqData
*ptr
)
3262 u8 bval1
= ptr
->DevType
& SCSI_DEVTYPE
;
3263 dcb
->dev_type
= bval1
;
3264 /* if (bval1 == TYPE_DISK || bval1 == TYPE_MOD) */
3265 disc_tagq_set(dcb
, ptr
);
3269 /* unmap mapped pci regions from SRB */
3270 static void pci_unmap_srb(struct AdapterCtlBlk
*acb
, struct ScsiReqBlk
*srb
)
3272 struct scsi_cmnd
*cmd
= srb
->cmd
;
3273 enum dma_data_direction dir
= cmd
->sc_data_direction
;
3275 if (scsi_sg_count(cmd
) && dir
!= PCI_DMA_NONE
) {
3276 /* unmap DC395x SG list */
3277 dprintkdbg(DBG_SG
, "pci_unmap_srb: list=%08x(%05x)\n",
3278 srb
->sg_bus_addr
, SEGMENTX_LEN
);
3279 pci_unmap_single(acb
->dev
, srb
->sg_bus_addr
,
3282 dprintkdbg(DBG_SG
, "pci_unmap_srb: segs=%i buffer=%p\n",
3283 scsi_sg_count(cmd
), scsi_bufflen(cmd
));
3284 /* unmap the sg segments */
3285 scsi_dma_unmap(cmd
);
3290 /* unmap mapped pci sense buffer from SRB */
3291 static void pci_unmap_srb_sense(struct AdapterCtlBlk
*acb
,
3292 struct ScsiReqBlk
*srb
)
3294 if (!(srb
->flag
& AUTO_REQSENSE
))
3296 /* Unmap sense buffer */
3297 dprintkdbg(DBG_SG
, "pci_unmap_srb_sense: buffer=%08x\n",
3298 srb
->segment_x
[0].address
);
3299 pci_unmap_single(acb
->dev
, srb
->segment_x
[0].address
,
3300 srb
->segment_x
[0].length
, PCI_DMA_FROMDEVICE
);
3301 /* Restore SG stuff */
3302 srb
->total_xfer_length
= srb
->xferred
;
3303 srb
->segment_x
[0].address
=
3304 srb
->segment_x
[DC395x_MAX_SG_LISTENTRY
- 1].address
;
3305 srb
->segment_x
[0].length
=
3306 srb
->segment_x
[DC395x_MAX_SG_LISTENTRY
- 1].length
;
3311 * Complete execution of a SCSI command
3312 * Signal completion to the generic SCSI driver
3314 static void srb_done(struct AdapterCtlBlk
*acb
, struct DeviceCtlBlk
*dcb
,
3315 struct ScsiReqBlk
*srb
)
3318 struct scsi_cmnd
*cmd
= srb
->cmd
;
3319 enum dma_data_direction dir
= cmd
->sc_data_direction
;
3322 dprintkdbg(DBG_1
, "srb_done: (0x%p) <%02i-%i>\n", srb
->cmd
,
3323 srb
->cmd
->device
->id
, srb
->cmd
->device
->lun
);
3324 dprintkdbg(DBG_SG
, "srb_done: srb=%p sg=%i(%i/%i) buf=%p\n",
3325 srb
, scsi_sg_count(cmd
), srb
->sg_index
, srb
->sg_count
,
3327 status
= srb
->target_status
;
3328 if (srb
->flag
& AUTO_REQSENSE
) {
3329 dprintkdbg(DBG_0
, "srb_done: AUTO_REQSENSE1\n");
3330 pci_unmap_srb_sense(acb
, srb
);
3332 ** target status..........................
3334 srb
->flag
&= ~AUTO_REQSENSE
;
3335 srb
->adapter_status
= 0;
3336 srb
->target_status
= CHECK_CONDITION
<< 1;
3337 if (debug_enabled(DBG_1
)) {
3338 switch (cmd
->sense_buffer
[2] & 0x0f) {
3340 dprintkl(KERN_DEBUG
,
3341 "ReqSense: NOT_READY cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3342 cmd
->cmnd
[0], dcb
->target_id
,
3343 dcb
->target_lun
, status
, acb
->scan_devices
);
3345 case UNIT_ATTENTION
:
3346 dprintkl(KERN_DEBUG
,
3347 "ReqSense: UNIT_ATTENTION cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3348 cmd
->cmnd
[0], dcb
->target_id
,
3349 dcb
->target_lun
, status
, acb
->scan_devices
);
3351 case ILLEGAL_REQUEST
:
3352 dprintkl(KERN_DEBUG
,
3353 "ReqSense: ILLEGAL_REQUEST cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3354 cmd
->cmnd
[0], dcb
->target_id
,
3355 dcb
->target_lun
, status
, acb
->scan_devices
);
3358 dprintkl(KERN_DEBUG
,
3359 "ReqSense: MEDIUM_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3360 cmd
->cmnd
[0], dcb
->target_id
,
3361 dcb
->target_lun
, status
, acb
->scan_devices
);
3363 case HARDWARE_ERROR
:
3364 dprintkl(KERN_DEBUG
,
3365 "ReqSense: HARDWARE_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3366 cmd
->cmnd
[0], dcb
->target_id
,
3367 dcb
->target_lun
, status
, acb
->scan_devices
);
3370 if (cmd
->sense_buffer
[7] >= 6)
3371 printk("sense=0x%02x ASC=0x%02x ASCQ=0x%02x "
3372 "(0x%08x 0x%08x)\n",
3373 cmd
->sense_buffer
[2], cmd
->sense_buffer
[12],
3374 cmd
->sense_buffer
[13],
3375 *((unsigned int *)(cmd
->sense_buffer
+ 3)),
3376 *((unsigned int *)(cmd
->sense_buffer
+ 8)));
3378 printk("sense=0x%02x No ASC/ASCQ (0x%08x)\n",
3379 cmd
->sense_buffer
[2],
3380 *((unsigned int *)(cmd
->sense_buffer
+ 3)));
3383 if (status
== (CHECK_CONDITION
<< 1)) {
3384 cmd
->result
= DID_BAD_TARGET
<< 16;
3387 dprintkdbg(DBG_0
, "srb_done: AUTO_REQSENSE2\n");
3389 if (srb
->total_xfer_length
3390 && srb
->total_xfer_length
>= cmd
->underflow
)
3392 MK_RES_LNX(DRIVER_SENSE
, DID_OK
,
3393 srb
->end_message
, CHECK_CONDITION
);
3394 /*SET_RES_DID(cmd->result,DID_OK) */
3397 MK_RES_LNX(DRIVER_SENSE
, DID_OK
,
3398 srb
->end_message
, CHECK_CONDITION
);
3403 /*************************************************************/
3406 * target status..........................
3408 if (status_byte(status
) == CHECK_CONDITION
) {
3409 request_sense(acb
, dcb
, srb
);
3411 } else if (status_byte(status
) == QUEUE_FULL
) {
3412 tempcnt
= (u8
)list_size(&dcb
->srb_going_list
);
3413 dprintkl(KERN_INFO
, "QUEUE_FULL for dev <%02i-%i> with %i cmnds\n",
3414 dcb
->target_id
, dcb
->target_lun
, tempcnt
);
3417 dcb
->max_command
= tempcnt
;
3419 srb_going_to_waiting_move(dcb
, srb
);
3420 waiting_set_timer(acb
, HZ
/ 20);
3421 srb
->adapter_status
= 0;
3422 srb
->target_status
= 0;
3424 } else if (status
== SCSI_STAT_SEL_TIMEOUT
) {
3425 srb
->adapter_status
= H_SEL_TIMEOUT
;
3426 srb
->target_status
= 0;
3427 cmd
->result
= DID_NO_CONNECT
<< 16;
3429 srb
->adapter_status
= 0;
3430 SET_RES_DID(cmd
->result
, DID_ERROR
);
3431 SET_RES_MSG(cmd
->result
, srb
->end_message
);
3432 SET_RES_TARGET(cmd
->result
, status
);
3437 ** process initiator status..........................
3439 status
= srb
->adapter_status
;
3440 if (status
& H_OVER_UNDER_RUN
) {
3441 srb
->target_status
= 0;
3442 SET_RES_DID(cmd
->result
, DID_OK
);
3443 SET_RES_MSG(cmd
->result
, srb
->end_message
);
3444 } else if (srb
->status
& PARITY_ERROR
) {
3445 SET_RES_DID(cmd
->result
, DID_PARITY
);
3446 SET_RES_MSG(cmd
->result
, srb
->end_message
);
3447 } else { /* No error */
3449 srb
->adapter_status
= 0;
3450 srb
->target_status
= 0;
3451 SET_RES_DID(cmd
->result
, DID_OK
);
3455 if (dir
!= PCI_DMA_NONE
&& scsi_sg_count(cmd
))
3456 pci_dma_sync_sg_for_cpu(acb
->dev
, scsi_sglist(cmd
),
3457 scsi_sg_count(cmd
), dir
);
3460 /* Check Error Conditions */
3463 if (cmd
->cmnd
[0] == INQUIRY
) {
3464 unsigned char *base
= NULL
;
3465 struct ScsiInqData
*ptr
;
3466 unsigned long flags
= 0;
3467 struct scatterlist
* sg
= scsi_sglist(cmd
);
3468 size_t offset
= 0, len
= sizeof(struct ScsiInqData
);
3470 local_irq_save(flags
);
3471 base
= scsi_kmap_atomic_sg(sg
, scsi_sg_count(cmd
), &offset
, &len
);
3472 ptr
= (struct ScsiInqData
*)(base
+ offset
);
3474 if (!ckc_only
&& (cmd
->result
& RES_DID
) == 0
3475 && cmd
->cmnd
[2] == 0 && scsi_bufflen(cmd
) >= 8
3476 && dir
!= PCI_DMA_NONE
&& ptr
&& (ptr
->Vers
& 0x07) >= 2)
3477 dcb
->inquiry7
= ptr
->Flags
;
3479 /*if( srb->cmd->cmnd[0] == INQUIRY && */
3480 /* (host_byte(cmd->result) == DID_OK || status_byte(cmd->result) & CHECK_CONDITION) ) */
3481 if ((cmd
->result
== (DID_OK
<< 16)
3482 || status_byte(cmd
->result
) &
3484 if (!dcb
->init_tcq_flag
) {
3485 add_dev(acb
, dcb
, ptr
);
3486 dcb
->init_tcq_flag
= 1;
3490 scsi_kunmap_atomic_sg(base
);
3491 local_irq_restore(flags
);
3494 /* Here is the info for Doug Gilbert's sg3 ... */
3495 scsi_set_resid(cmd
, srb
->total_xfer_length
);
3496 /* This may be interpreted by sb. or not ... */
3497 cmd
->SCp
.this_residual
= srb
->total_xfer_length
;
3498 cmd
->SCp
.buffers_residual
= 0;
3499 if (debug_enabled(DBG_KG
)) {
3500 if (srb
->total_xfer_length
)
3501 dprintkdbg(DBG_KG
, "srb_done: (0x%p) <%02i-%i> "
3502 "cmnd=0x%02x Missed %i bytes\n",
3503 cmd
, cmd
->device
->id
, cmd
->device
->lun
,
3504 cmd
->cmnd
[0], srb
->total_xfer_length
);
3507 srb_going_remove(dcb
, srb
);
3508 /* Add to free list */
3509 if (srb
== acb
->tmp_srb
)
3510 dprintkl(KERN_ERR
, "srb_done: ERROR! Completed cmd with tmp_srb\n");
3512 dprintkdbg(DBG_0
, "srb_done: (0x%p) done result=0x%08x\n",
3514 srb_free_insert(acb
, srb
);
3516 pci_unmap_srb(acb
, srb
);
3518 cmd
->scsi_done(cmd
);
3519 waiting_process_next(acb
);
3523 /* abort all cmds in our queues */
3524 static void doing_srb_done(struct AdapterCtlBlk
*acb
, u8 did_flag
,
3525 struct scsi_cmnd
*cmd
, u8 force
)
3527 struct DeviceCtlBlk
*dcb
;
3528 dprintkl(KERN_INFO
, "doing_srb_done: pids ");
3530 list_for_each_entry(dcb
, &acb
->dcb_list
, list
) {
3531 struct ScsiReqBlk
*srb
;
3532 struct ScsiReqBlk
*tmp
;
3533 struct scsi_cmnd
*p
;
3535 list_for_each_entry_safe(srb
, tmp
, &dcb
->srb_going_list
, list
) {
3536 enum dma_data_direction dir
;
3540 dir
= p
->sc_data_direction
;
3541 result
= MK_RES(0, did_flag
, 0, 0);
3542 printk("G:%p(%02i-%i) ", p
,
3543 p
->device
->id
, p
->device
->lun
);
3544 srb_going_remove(dcb
, srb
);
3546 srb_free_insert(acb
, srb
);
3548 pci_unmap_srb_sense(acb
, srb
);
3549 pci_unmap_srb(acb
, srb
);
3551 /* For new EH, we normally don't need to give commands back,
3552 * as they all complete or all time out */
3556 if (!list_empty(&dcb
->srb_going_list
))
3557 dprintkl(KERN_DEBUG
,
3558 "How could the ML send cmnds to the Going queue? <%02i-%i>\n",
3559 dcb
->target_id
, dcb
->target_lun
);
3561 dprintkl(KERN_DEBUG
,
3562 "tag_mask for <%02i-%i> should be empty, is %08x!\n",
3563 dcb
->target_id
, dcb
->target_lun
,
3567 list_for_each_entry_safe(srb
, tmp
, &dcb
->srb_waiting_list
, list
) {
3571 result
= MK_RES(0, did_flag
, 0, 0);
3572 printk("W:%p<%02i-%i>", p
, p
->device
->id
,
3574 srb_waiting_remove(dcb
, srb
);
3575 srb_free_insert(acb
, srb
);
3577 pci_unmap_srb_sense(acb
, srb
);
3578 pci_unmap_srb(acb
, srb
);
3580 /* For new EH, we normally don't need to give commands back,
3581 * as they all complete or all time out */
3582 cmd
->scsi_done(cmd
);
3585 if (!list_empty(&dcb
->srb_waiting_list
))
3586 dprintkl(KERN_DEBUG
, "ML queued %i cmnds again to <%02i-%i>\n",
3587 list_size(&dcb
->srb_waiting_list
), dcb
->target_id
,
3589 dcb
->flag
&= ~ABORT_DEV_
;
3595 static void reset_scsi_bus(struct AdapterCtlBlk
*acb
)
3597 dprintkdbg(DBG_0
, "reset_scsi_bus: acb=%p\n", acb
);
3598 acb
->acb_flag
|= RESET_DEV
; /* RESET_DETECT, RESET_DONE, RESET_DEV */
3599 DC395x_write16(acb
, TRM_S1040_SCSI_CONTROL
, DO_RSTSCSI
);
3601 while (!(DC395x_read8(acb
, TRM_S1040_SCSI_INTSTATUS
) & INT_SCSIRESET
))
3606 static void set_basic_config(struct AdapterCtlBlk
*acb
)
3610 DC395x_write8(acb
, TRM_S1040_SCSI_TIMEOUT
, acb
->sel_timeout
);
3611 if (acb
->config
& HCC_PARITY
)
3612 bval
= PHASELATCH
| INITIATOR
| BLOCKRST
| PARITYCHECK
;
3614 bval
= PHASELATCH
| INITIATOR
| BLOCKRST
;
3616 DC395x_write8(acb
, TRM_S1040_SCSI_CONFIG0
, bval
);
3618 /* program configuration 1: Act_Neg (+ Act_Neg_Enh? + Fast_Filter? + DataDis?) */
3619 DC395x_write8(acb
, TRM_S1040_SCSI_CONFIG1
, 0x03); /* was 0x13: default */
3620 /* program Host ID */
3621 DC395x_write8(acb
, TRM_S1040_SCSI_HOSTID
, acb
->scsi_host
->this_id
);
3622 /* set ansynchronous transfer */
3623 DC395x_write8(acb
, TRM_S1040_SCSI_OFFSET
, 0x00);
3624 /* Turn LED control off */
3625 wval
= DC395x_read16(acb
, TRM_S1040_GEN_CONTROL
) & 0x7F;
3626 DC395x_write16(acb
, TRM_S1040_GEN_CONTROL
, wval
);
3628 wval
= DC395x_read16(acb
, TRM_S1040_DMA_CONFIG
) & ~DMA_FIFO_CTRL
;
3630 DMA_FIFO_HALF_HALF
| DMA_ENHANCE
/*| DMA_MEM_MULTI_READ */ ;
3631 DC395x_write16(acb
, TRM_S1040_DMA_CONFIG
, wval
);
3632 /* Clear pending interrupt status */
3633 DC395x_read8(acb
, TRM_S1040_SCSI_INTSTATUS
);
3634 /* Enable SCSI interrupt */
3635 DC395x_write8(acb
, TRM_S1040_SCSI_INTEN
, 0x7F);
3636 DC395x_write8(acb
, TRM_S1040_DMA_INTEN
, EN_SCSIINTR
| EN_DMAXFERERROR
3637 /*| EN_DMAXFERABORT | EN_DMAXFERCOMP | EN_FORCEDMACOMP */
3642 static void scsi_reset_detect(struct AdapterCtlBlk
*acb
)
3644 dprintkl(KERN_INFO
, "scsi_reset_detect: acb=%p\n", acb
);
3645 /* delay half a second */
3646 if (timer_pending(&acb
->waiting_timer
))
3647 del_timer(&acb
->waiting_timer
);
3649 DC395x_write8(acb
, TRM_S1040_SCSI_CONTROL
, DO_RSTMODULE
);
3650 DC395x_write8(acb
, TRM_S1040_DMA_CONTROL
, DMARESETMODULE
);
3651 /*DC395x_write8(acb, TRM_S1040_DMA_CONTROL,STOPDMAXFER); */
3653 /* Maybe we locked up the bus? Then lets wait even longer ... */
3655 jiffies
+ 5 * HZ
/ 2 +
3656 HZ
* acb
->eeprom
.delay_time
;
3658 clear_fifo(acb
, "scsi_reset_detect");
3659 set_basic_config(acb
);
3661 /*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT); */
3663 if (acb
->acb_flag
& RESET_DEV
) { /* RESET_DETECT, RESET_DONE, RESET_DEV */
3664 acb
->acb_flag
|= RESET_DONE
;
3666 acb
->acb_flag
|= RESET_DETECT
;
3667 reset_dev_param(acb
);
3668 doing_srb_done(acb
, DID_RESET
, NULL
, 1);
3669 /*DC395x_RecoverSRB( acb ); */
3670 acb
->active_dcb
= NULL
;
3672 waiting_process_next(acb
);
3677 static void request_sense(struct AdapterCtlBlk
*acb
, struct DeviceCtlBlk
*dcb
,
3678 struct ScsiReqBlk
*srb
)
3680 struct scsi_cmnd
*cmd
= srb
->cmd
;
3681 dprintkdbg(DBG_1
, "request_sense: (0x%p) <%02i-%i>\n",
3682 cmd
, cmd
->device
->id
, cmd
->device
->lun
);
3684 srb
->flag
|= AUTO_REQSENSE
;
3685 srb
->adapter_status
= 0;
3686 srb
->target_status
= 0;
3688 /* KG: Can this prevent crap sense data ? */
3689 memset(cmd
->sense_buffer
, 0, SCSI_SENSE_BUFFERSIZE
);
3691 /* Save some data */
3692 srb
->segment_x
[DC395x_MAX_SG_LISTENTRY
- 1].address
=
3693 srb
->segment_x
[0].address
;
3694 srb
->segment_x
[DC395x_MAX_SG_LISTENTRY
- 1].length
=
3695 srb
->segment_x
[0].length
;
3696 srb
->xferred
= srb
->total_xfer_length
;
3697 /* srb->segment_x : a one entry of S/G list table */
3698 srb
->total_xfer_length
= SCSI_SENSE_BUFFERSIZE
;
3699 srb
->segment_x
[0].length
= SCSI_SENSE_BUFFERSIZE
;
3700 /* Map sense buffer */
3701 srb
->segment_x
[0].address
=
3702 pci_map_single(acb
->dev
, cmd
->sense_buffer
,
3703 SCSI_SENSE_BUFFERSIZE
, PCI_DMA_FROMDEVICE
);
3704 dprintkdbg(DBG_SG
, "request_sense: map buffer %p->%08x(%05x)\n",
3705 cmd
->sense_buffer
, srb
->segment_x
[0].address
,
3706 SCSI_SENSE_BUFFERSIZE
);
3710 if (start_scsi(acb
, dcb
, srb
)) { /* Should only happen, if sb. else grabs the bus */
3711 dprintkl(KERN_DEBUG
,
3712 "request_sense: (0x%p) failed <%02i-%i>\n",
3713 srb
->cmd
, dcb
->target_id
, dcb
->target_lun
);
3714 srb_going_to_waiting_move(dcb
, srb
);
3715 waiting_set_timer(acb
, HZ
/ 100);
3721 * device_alloc - Allocate a new device instance. This create the
3722 * devices instance and sets up all the data items. The adapter
3723 * instance is required to obtain confiuration information for this
3724 * device. This does *not* add this device to the adapters device
3727 * @acb: The adapter to obtain configuration information from.
3728 * @target: The target for the new device.
3729 * @lun: The lun for the new device.
3731 * Return the new device if successful or NULL on failure.
3733 static struct DeviceCtlBlk
*device_alloc(struct AdapterCtlBlk
*acb
,
3736 struct NvRamType
*eeprom
= &acb
->eeprom
;
3737 u8 period_index
= eeprom
->target
[target
].period
& 0x07;
3738 struct DeviceCtlBlk
*dcb
;
3740 dcb
= kmalloc(sizeof(struct DeviceCtlBlk
), GFP_ATOMIC
);
3741 dprintkdbg(DBG_0
, "device_alloc: <%02i-%i>\n", target
, lun
);
3745 INIT_LIST_HEAD(&dcb
->srb_going_list
);
3746 INIT_LIST_HEAD(&dcb
->srb_waiting_list
);
3747 dcb
->active_srb
= NULL
;
3749 dcb
->max_command
= 1;
3750 dcb
->target_id
= target
;
3751 dcb
->target_lun
= lun
;
3752 dcb
->dev_mode
= eeprom
->target
[target
].cfg0
;
3753 #ifndef DC395x_NO_DISCONNECT
3755 IDENTIFY(dcb
->dev_mode
& NTC_DO_DISCONNECT
, lun
);
3757 dcb
->identify_msg
= IDENTIFY(0, lun
);
3761 dcb
->min_nego_period
= clock_period
[period_index
];
3762 dcb
->sync_period
= 0;
3763 dcb
->sync_offset
= 0;
3766 #ifndef DC395x_NO_WIDE
3767 if ((dcb
->dev_mode
& NTC_DO_WIDE_NEGO
)
3768 && (acb
->config
& HCC_WIDE_CARD
))
3769 dcb
->sync_mode
|= WIDE_NEGO_ENABLE
;
3771 #ifndef DC395x_NO_SYNC
3772 if (dcb
->dev_mode
& NTC_DO_SYNC_NEGO
)
3773 if (!(lun
) || current_sync_offset
)
3774 dcb
->sync_mode
|= SYNC_NEGO_ENABLE
;
3776 if (dcb
->target_lun
!= 0) {
3778 struct DeviceCtlBlk
*p
;
3779 list_for_each_entry(p
, &acb
->dcb_list
, list
)
3780 if (p
->target_id
== dcb
->target_id
)
3783 "device_alloc: <%02i-%i> copy from <%02i-%i>\n",
3784 dcb
->target_id
, dcb
->target_lun
,
3785 p
->target_id
, p
->target_lun
);
3786 dcb
->sync_mode
= p
->sync_mode
;
3787 dcb
->sync_period
= p
->sync_period
;
3788 dcb
->min_nego_period
= p
->min_nego_period
;
3789 dcb
->sync_offset
= p
->sync_offset
;
3790 dcb
->inquiry7
= p
->inquiry7
;
3797 * adapter_add_device - Adds the device instance to the adaptor instance.
3799 * @acb: The adapter device to be updated
3800 * @dcb: A newly created and initialised device instance to add.
3802 static void adapter_add_device(struct AdapterCtlBlk
*acb
,
3803 struct DeviceCtlBlk
*dcb
)
3805 /* backpointer to adapter */
3808 /* set run_robin to this device if it is currently empty */
3809 if (list_empty(&acb
->dcb_list
))
3810 acb
->dcb_run_robin
= dcb
;
3812 /* add device to list */
3813 list_add_tail(&dcb
->list
, &acb
->dcb_list
);
3815 /* update device maps */
3816 acb
->dcb_map
[dcb
->target_id
] |= (1 << dcb
->target_lun
);
3817 acb
->children
[dcb
->target_id
][dcb
->target_lun
] = dcb
;
3822 * adapter_remove_device - Removes the device instance from the adaptor
3823 * instance. The device instance is not check in any way or freed by this.
3824 * The caller is expected to take care of that. This will simply remove the
3825 * device from the adapters data strcutures.
3827 * @acb: The adapter device to be updated
3828 * @dcb: A device that has previously been added to the adapter.
3830 static void adapter_remove_device(struct AdapterCtlBlk
*acb
,
3831 struct DeviceCtlBlk
*dcb
)
3833 struct DeviceCtlBlk
*i
;
3834 struct DeviceCtlBlk
*tmp
;
3835 dprintkdbg(DBG_0
, "adapter_remove_device: <%02i-%i>\n",
3836 dcb
->target_id
, dcb
->target_lun
);
3838 /* fix up any pointers to this device that we have in the adapter */
3839 if (acb
->active_dcb
== dcb
)
3840 acb
->active_dcb
= NULL
;
3841 if (acb
->dcb_run_robin
== dcb
)
3842 acb
->dcb_run_robin
= dcb_get_next(&acb
->dcb_list
, dcb
);
3844 /* unlink from list */
3845 list_for_each_entry_safe(i
, tmp
, &acb
->dcb_list
, list
)
3851 /* clear map and children */
3852 acb
->dcb_map
[dcb
->target_id
] &= ~(1 << dcb
->target_lun
);
3853 acb
->children
[dcb
->target_id
][dcb
->target_lun
] = NULL
;
3859 * adapter_remove_and_free_device - Removes a single device from the adapter
3860 * and then frees the device information.
3862 * @acb: The adapter device to be updated
3863 * @dcb: A device that has previously been added to the adapter.
3865 static void adapter_remove_and_free_device(struct AdapterCtlBlk
*acb
,
3866 struct DeviceCtlBlk
*dcb
)
3868 if (list_size(&dcb
->srb_going_list
) > 1) {
3869 dprintkdbg(DBG_1
, "adapter_remove_and_free_device: <%02i-%i> "
3870 "Won't remove because of %i active requests.\n",
3871 dcb
->target_id
, dcb
->target_lun
,
3872 list_size(&dcb
->srb_going_list
));
3875 adapter_remove_device(acb
, dcb
);
3881 * adapter_remove_and_free_all_devices - Removes and frees all of the
3882 * devices associated with the specified adapter.
3884 * @acb: The adapter from which all devices should be removed.
3886 static void adapter_remove_and_free_all_devices(struct AdapterCtlBlk
* acb
)
3888 struct DeviceCtlBlk
*dcb
;
3889 struct DeviceCtlBlk
*tmp
;
3890 dprintkdbg(DBG_1
, "adapter_remove_and_free_all_devices: num=%i\n",
3891 list_size(&acb
->dcb_list
));
3893 list_for_each_entry_safe(dcb
, tmp
, &acb
->dcb_list
, list
)
3894 adapter_remove_and_free_device(acb
, dcb
);
3899 * dc395x_slave_alloc - Called by the scsi mid layer to tell us about a new
3900 * scsi device that we need to deal with. We allocate a new device and then
3901 * insert that device into the adapters device list.
3903 * @scsi_device: The new scsi device that we need to handle.
3905 static int dc395x_slave_alloc(struct scsi_device
*scsi_device
)
3907 struct AdapterCtlBlk
*acb
= (struct AdapterCtlBlk
*)scsi_device
->host
->hostdata
;
3908 struct DeviceCtlBlk
*dcb
;
3910 dcb
= device_alloc(acb
, scsi_device
->id
, scsi_device
->lun
);
3913 adapter_add_device(acb
, dcb
);
3920 * dc395x_slave_destroy - Called by the scsi mid layer to tell us about a
3921 * device that is going away.
3923 * @scsi_device: The new scsi device that we need to handle.
3925 static void dc395x_slave_destroy(struct scsi_device
*scsi_device
)
3927 struct AdapterCtlBlk
*acb
= (struct AdapterCtlBlk
*)scsi_device
->host
->hostdata
;
3928 struct DeviceCtlBlk
*dcb
= find_dcb(acb
, scsi_device
->id
, scsi_device
->lun
);
3930 adapter_remove_and_free_device(acb
, dcb
);
3937 * trms1040_wait_30us: wait for 30 us
3939 * Waits for 30us (using the chip by the looks of it..)
3941 * @io_port: base I/O address
3943 static void trms1040_wait_30us(unsigned long io_port
)
3945 /* ScsiPortStallExecution(30); wait 30 us */
3946 outb(5, io_port
+ TRM_S1040_GEN_TIMER
);
3947 while (!(inb(io_port
+ TRM_S1040_GEN_STATUS
) & GTIMEOUT
))
3953 * trms1040_write_cmd - write the secified command and address to
3956 * @io_port: base I/O address
3957 * @cmd: SB + op code (command) to send
3958 * @addr: address to send
3960 static void trms1040_write_cmd(unsigned long io_port
, u8 cmd
, u8 addr
)
3965 /* program SB + OP code */
3966 for (i
= 0; i
< 3; i
++, cmd
<<= 1) {
3967 send_data
= NVR_SELECT
;
3968 if (cmd
& 0x04) /* Start from bit 2 */
3969 send_data
|= NVR_BITOUT
;
3971 outb(send_data
, io_port
+ TRM_S1040_GEN_NVRAM
);
3972 trms1040_wait_30us(io_port
);
3973 outb((send_data
| NVR_CLOCK
),
3974 io_port
+ TRM_S1040_GEN_NVRAM
);
3975 trms1040_wait_30us(io_port
);
3979 for (i
= 0; i
< 7; i
++, addr
<<= 1) {
3980 send_data
= NVR_SELECT
;
3981 if (addr
& 0x40) /* Start from bit 6 */
3982 send_data
|= NVR_BITOUT
;
3984 outb(send_data
, io_port
+ TRM_S1040_GEN_NVRAM
);
3985 trms1040_wait_30us(io_port
);
3986 outb((send_data
| NVR_CLOCK
),
3987 io_port
+ TRM_S1040_GEN_NVRAM
);
3988 trms1040_wait_30us(io_port
);
3990 outb(NVR_SELECT
, io_port
+ TRM_S1040_GEN_NVRAM
);
3991 trms1040_wait_30us(io_port
);
3996 * trms1040_set_data - store a single byte in the eeprom
3998 * Called from write all to write a single byte into the SSEEPROM
3999 * Which is done one bit at a time.
4001 * @io_port: base I/O address
4002 * @addr: offset into EEPROM
4003 * @byte: bytes to write
4005 static void trms1040_set_data(unsigned long io_port
, u8 addr
, u8 byte
)
4010 /* Send write command & address */
4011 trms1040_write_cmd(io_port
, 0x05, addr
);
4014 for (i
= 0; i
< 8; i
++, byte
<<= 1) {
4015 send_data
= NVR_SELECT
;
4016 if (byte
& 0x80) /* Start from bit 7 */
4017 send_data
|= NVR_BITOUT
;
4019 outb(send_data
, io_port
+ TRM_S1040_GEN_NVRAM
);
4020 trms1040_wait_30us(io_port
);
4021 outb((send_data
| NVR_CLOCK
), io_port
+ TRM_S1040_GEN_NVRAM
);
4022 trms1040_wait_30us(io_port
);
4024 outb(NVR_SELECT
, io_port
+ TRM_S1040_GEN_NVRAM
);
4025 trms1040_wait_30us(io_port
);
4027 /* Disable chip select */
4028 outb(0, io_port
+ TRM_S1040_GEN_NVRAM
);
4029 trms1040_wait_30us(io_port
);
4031 outb(NVR_SELECT
, io_port
+ TRM_S1040_GEN_NVRAM
);
4032 trms1040_wait_30us(io_port
);
4034 /* Wait for write ready */
4036 outb((NVR_SELECT
| NVR_CLOCK
), io_port
+ TRM_S1040_GEN_NVRAM
);
4037 trms1040_wait_30us(io_port
);
4039 outb(NVR_SELECT
, io_port
+ TRM_S1040_GEN_NVRAM
);
4040 trms1040_wait_30us(io_port
);
4042 if (inb(io_port
+ TRM_S1040_GEN_NVRAM
) & NVR_BITIN
)
4046 /* Disable chip select */
4047 outb(0, io_port
+ TRM_S1040_GEN_NVRAM
);
4052 * trms1040_write_all - write 128 bytes to the eeprom
4054 * Write the supplied 128 bytes to the chips SEEPROM
4056 * @eeprom: the data to write
4057 * @io_port: the base io port
4059 static void trms1040_write_all(struct NvRamType
*eeprom
, unsigned long io_port
)
4061 u8
*b_eeprom
= (u8
*)eeprom
;
4064 /* Enable SEEPROM */
4065 outb((inb(io_port
+ TRM_S1040_GEN_CONTROL
) | EN_EEPROM
),
4066 io_port
+ TRM_S1040_GEN_CONTROL
);
4069 trms1040_write_cmd(io_port
, 0x04, 0xFF);
4070 outb(0, io_port
+ TRM_S1040_GEN_NVRAM
);
4071 trms1040_wait_30us(io_port
);
4074 for (addr
= 0; addr
< 128; addr
++, b_eeprom
++)
4075 trms1040_set_data(io_port
, addr
, *b_eeprom
);
4078 trms1040_write_cmd(io_port
, 0x04, 0x00);
4079 outb(0, io_port
+ TRM_S1040_GEN_NVRAM
);
4080 trms1040_wait_30us(io_port
);
4082 /* Disable SEEPROM */
4083 outb((inb(io_port
+ TRM_S1040_GEN_CONTROL
) & ~EN_EEPROM
),
4084 io_port
+ TRM_S1040_GEN_CONTROL
);
4089 * trms1040_get_data - get a single byte from the eeprom
4091 * Called from read all to read a single byte into the SSEEPROM
4092 * Which is done one bit at a time.
4094 * @io_port: base I/O address
4095 * @addr: offset into SEEPROM
4097 * Returns the byte read.
4099 static u8
trms1040_get_data(unsigned long io_port
, u8 addr
)
4105 /* Send read command & address */
4106 trms1040_write_cmd(io_port
, 0x06, addr
);
4109 for (i
= 0; i
< 8; i
++) {
4110 outb((NVR_SELECT
| NVR_CLOCK
), io_port
+ TRM_S1040_GEN_NVRAM
);
4111 trms1040_wait_30us(io_port
);
4112 outb(NVR_SELECT
, io_port
+ TRM_S1040_GEN_NVRAM
);
4114 /* Get data bit while falling edge */
4115 read_byte
= inb(io_port
+ TRM_S1040_GEN_NVRAM
);
4117 if (read_byte
& NVR_BITIN
)
4120 trms1040_wait_30us(io_port
);
4123 /* Disable chip select */
4124 outb(0, io_port
+ TRM_S1040_GEN_NVRAM
);
4130 * trms1040_read_all - read all bytes from the eeprom
4132 * Read the 128 bytes from the SEEPROM.
4134 * @eeprom: where to store the data
4135 * @io_port: the base io port
4137 static void trms1040_read_all(struct NvRamType
*eeprom
, unsigned long io_port
)
4139 u8
*b_eeprom
= (u8
*)eeprom
;
4142 /* Enable SEEPROM */
4143 outb((inb(io_port
+ TRM_S1040_GEN_CONTROL
) | EN_EEPROM
),
4144 io_port
+ TRM_S1040_GEN_CONTROL
);
4147 for (addr
= 0; addr
< 128; addr
++, b_eeprom
++)
4148 *b_eeprom
= trms1040_get_data(io_port
, addr
);
4150 /* Disable SEEPROM */
4151 outb((inb(io_port
+ TRM_S1040_GEN_CONTROL
) & ~EN_EEPROM
),
4152 io_port
+ TRM_S1040_GEN_CONTROL
);
4158 * check_eeprom - get and check contents of the eeprom
4160 * Read seeprom 128 bytes into the memory provider in eeprom.
4161 * Checks the checksum and if it's not correct it uses a set of default
4164 * @eeprom: caller allocated strcuture to read the eeprom data into
4165 * @io_port: io port to read from
4167 static void check_eeprom(struct NvRamType
*eeprom
, unsigned long io_port
)
4169 u16
*w_eeprom
= (u16
*)eeprom
;
4175 trms1040_read_all(eeprom
, io_port
); /* read eeprom */
4178 for (w_addr
= 0, w_eeprom
= (u16
*)eeprom
; w_addr
< 64;
4179 w_addr
++, w_eeprom
++)
4181 if (cksum
!= 0x1234) {
4183 * Checksum is wrong.
4184 * Load a set of defaults into the eeprom buffer
4186 dprintkl(KERN_WARNING
,
4187 "EEProm checksum error: using default values and options.\n");
4188 eeprom
->sub_vendor_id
[0] = (u8
)PCI_VENDOR_ID_TEKRAM
;
4189 eeprom
->sub_vendor_id
[1] = (u8
)(PCI_VENDOR_ID_TEKRAM
>> 8);
4190 eeprom
->sub_sys_id
[0] = (u8
)PCI_DEVICE_ID_TEKRAM_TRMS1040
;
4191 eeprom
->sub_sys_id
[1] =
4192 (u8
)(PCI_DEVICE_ID_TEKRAM_TRMS1040
>> 8);
4193 eeprom
->sub_class
= 0x00;
4194 eeprom
->vendor_id
[0] = (u8
)PCI_VENDOR_ID_TEKRAM
;
4195 eeprom
->vendor_id
[1] = (u8
)(PCI_VENDOR_ID_TEKRAM
>> 8);
4196 eeprom
->device_id
[0] = (u8
)PCI_DEVICE_ID_TEKRAM_TRMS1040
;
4197 eeprom
->device_id
[1] =
4198 (u8
)(PCI_DEVICE_ID_TEKRAM_TRMS1040
>> 8);
4199 eeprom
->reserved
= 0x00;
4201 for (d_addr
= 0, d_eeprom
= (u32
*)eeprom
->target
;
4202 d_addr
< 16; d_addr
++, d_eeprom
++)
4203 *d_eeprom
= 0x00000077; /* cfg3,cfg2,period,cfg0 */
4205 *d_eeprom
++ = 0x04000F07; /* max_tag,delay_time,channel_cfg,scsi_id */
4206 *d_eeprom
++ = 0x00000015; /* reserved1,boot_lun,boot_target,reserved0 */
4207 for (d_addr
= 0; d_addr
< 12; d_addr
++, d_eeprom
++)
4210 /* Now load defaults (maybe set by boot/module params) */
4211 set_safe_settings();
4213 eeprom_override(eeprom
);
4215 eeprom
->cksum
= 0x00;
4216 for (w_addr
= 0, cksum
= 0, w_eeprom
= (u16
*)eeprom
;
4217 w_addr
< 63; w_addr
++, w_eeprom
++)
4220 *w_eeprom
= 0x1234 - cksum
;
4221 trms1040_write_all(eeprom
, io_port
);
4222 eeprom
->delay_time
= cfg_data
[CFG_RESET_DELAY
].value
;
4224 set_safe_settings();
4225 eeprom_index_to_delay(eeprom
);
4226 eeprom_override(eeprom
);
4232 * print_eeprom_settings - output the eeprom settings
4233 * to the kernel log so people can see what they were.
4235 * @eeprom: The eeprom data strucutre to show details for.
4237 static void print_eeprom_settings(struct NvRamType
*eeprom
)
4239 dprintkl(KERN_INFO
, "Used settings: AdapterID=%02i, Speed=%i(%02i.%01iMHz), dev_mode=0x%02x\n",
4241 eeprom
->target
[0].period
,
4242 clock_speed
[eeprom
->target
[0].period
] / 10,
4243 clock_speed
[eeprom
->target
[0].period
] % 10,
4244 eeprom
->target
[0].cfg0
);
4245 dprintkl(KERN_INFO
, " AdaptMode=0x%02x, Tags=%i(%02i), DelayReset=%is\n",
4246 eeprom
->channel_cfg
, eeprom
->max_tag
,
4247 1 << eeprom
->max_tag
, eeprom
->delay_time
);
4251 /* Free SG tables */
4252 static void adapter_sg_tables_free(struct AdapterCtlBlk
*acb
)
4255 const unsigned srbs_per_page
= PAGE_SIZE
/SEGMENTX_LEN
;
4257 for (i
= 0; i
< DC395x_MAX_SRB_CNT
; i
+= srbs_per_page
)
4258 kfree(acb
->srb_array
[i
].segment_x
);
4263 * Allocate SG tables; as we have to pci_map them, an SG list (struct SGentry*)
4264 * should never cross a page boundary */
4265 static int adapter_sg_tables_alloc(struct AdapterCtlBlk
*acb
)
4267 const unsigned mem_needed
= (DC395x_MAX_SRB_CNT
+1)
4269 int pages
= (mem_needed
+(PAGE_SIZE
-1))/PAGE_SIZE
;
4270 const unsigned srbs_per_page
= PAGE_SIZE
/SEGMENTX_LEN
;
4273 struct SGentry
*uninitialized_var(ptr
);
4275 for (i
= 0; i
< DC395x_MAX_SRB_CNT
; i
++)
4276 acb
->srb_array
[i
].segment_x
= NULL
;
4278 dprintkdbg(DBG_1
, "Allocate %i pages for SG tables\n", pages
);
4280 ptr
= kmalloc(PAGE_SIZE
, GFP_KERNEL
);
4282 adapter_sg_tables_free(acb
);
4285 dprintkdbg(DBG_1
, "Allocate %li bytes at %p for SG segments %i\n",
4286 PAGE_SIZE
, ptr
, srb_idx
);
4288 while (i
< srbs_per_page
&& srb_idx
< DC395x_MAX_SRB_CNT
)
4289 acb
->srb_array
[srb_idx
++].segment_x
=
4290 ptr
+ (i
++ * DC395x_MAX_SG_LISTENTRY
);
4292 if (i
< srbs_per_page
)
4293 acb
->srb
.segment_x
=
4294 ptr
+ (i
* DC395x_MAX_SG_LISTENTRY
);
4296 dprintkl(KERN_DEBUG
, "No space for tmsrb SG table reserved?!\n");
4303 * adapter_print_config - print adapter connection and termination
4306 * The io port in the adapter needs to have been set before calling
4309 * @acb: The adapter to print the information for.
4311 static void adapter_print_config(struct AdapterCtlBlk
*acb
)
4315 bval
= DC395x_read8(acb
, TRM_S1040_GEN_STATUS
);
4316 dprintkl(KERN_INFO
, "%sConnectors: ",
4317 ((bval
& WIDESCSI
) ? "(Wide) " : ""));
4318 if (!(bval
& CON5068
))
4319 printk("ext%s ", !(bval
& EXT68HIGH
) ? "68" : "50");
4320 if (!(bval
& CON68
))
4321 printk("int68%s ", !(bval
& INT68HIGH
) ? "" : "(50)");
4322 if (!(bval
& CON50
))
4324 if ((bval
& (CON5068
| CON50
| CON68
)) ==
4325 0 /*(CON5068 | CON50 | CON68) */ )
4326 printk(" Oops! (All 3?) ");
4327 bval
= DC395x_read8(acb
, TRM_S1040_GEN_CONTROL
);
4328 printk(" Termination: ");
4329 if (bval
& DIS_TERM
)
4330 printk("Disabled\n");
4332 if (bval
& AUTOTERM
)
4334 if (bval
& LOW8TERM
)
4344 * adapter_init_params - Initialize the various parameters in the
4345 * adapter structure. Note that the pointer to the scsi_host is set
4346 * early (when this instance is created) and the io_port and irq
4347 * values are set later after they have been reserved. This just gets
4348 * everything set to a good starting position.
4350 * The eeprom structure in the adapter needs to have been set before
4351 * calling this function.
4353 * @acb: The adapter to initialize.
4355 static void adapter_init_params(struct AdapterCtlBlk
*acb
)
4357 struct NvRamType
*eeprom
= &acb
->eeprom
;
4360 /* NOTE: acb->scsi_host is set at scsi_host/acb creation time */
4361 /* NOTE: acb->io_port_base is set at port registration time */
4362 /* NOTE: acb->io_port_len is set at port registration time */
4364 INIT_LIST_HEAD(&acb
->dcb_list
);
4365 acb
->dcb_run_robin
= NULL
;
4366 acb
->active_dcb
= NULL
;
4368 INIT_LIST_HEAD(&acb
->srb_free_list
);
4369 /* temp SRB for Q tag used or abort command used */
4370 acb
->tmp_srb
= &acb
->srb
;
4371 init_timer(&acb
->waiting_timer
);
4372 init_timer(&acb
->selto_timer
);
4374 acb
->srb_count
= DC395x_MAX_SRB_CNT
;
4376 acb
->sel_timeout
= DC395x_SEL_TIMEOUT
; /* timeout=250ms */
4377 /* NOTE: acb->irq_level is set at IRQ registration time */
4379 acb
->tag_max_num
= 1 << eeprom
->max_tag
;
4380 if (acb
->tag_max_num
> 30)
4381 acb
->tag_max_num
= 30;
4383 acb
->acb_flag
= 0; /* RESET_DETECT, RESET_DONE, RESET_DEV */
4384 acb
->gmode2
= eeprom
->channel_cfg
;
4385 acb
->config
= 0; /* NOTE: actually set in adapter_init_chip */
4387 if (eeprom
->channel_cfg
& NAC_SCANLUN
)
4389 acb
->scan_devices
= 1;
4391 acb
->scsi_host
->this_id
= eeprom
->scsi_id
;
4392 acb
->hostid_bit
= (1 << acb
->scsi_host
->this_id
);
4394 for (i
= 0; i
< DC395x_MAX_SCSI_ID
; i
++)
4395 acb
->dcb_map
[i
] = 0;
4399 /* link static array of srbs into the srb free list */
4400 for (i
= 0; i
< acb
->srb_count
- 1; i
++)
4401 srb_free_insert(acb
, &acb
->srb_array
[i
]);
4406 * adapter_init_host - Initialize the scsi host instance based on
4407 * values that we have already stored in the adapter instance. There's
4408 * some mention that a lot of these are deprecated, so we won't use
4409 * them (we'll use the ones in the adapter instance) but we'll fill
4410 * them in in case something else needs them.
4412 * The eeprom structure, irq and io ports in the adapter need to have
4413 * been set before calling this function.
4415 * @host: The scsi host instance to fill in the values for.
4417 static void adapter_init_scsi_host(struct Scsi_Host
*host
)
4419 struct AdapterCtlBlk
*acb
= (struct AdapterCtlBlk
*)host
->hostdata
;
4420 struct NvRamType
*eeprom
= &acb
->eeprom
;
4422 host
->max_cmd_len
= 24;
4423 host
->can_queue
= DC395x_MAX_CMD_QUEUE
;
4424 host
->cmd_per_lun
= DC395x_MAX_CMD_PER_LUN
;
4425 host
->this_id
= (int)eeprom
->scsi_id
;
4426 host
->io_port
= acb
->io_port_base
;
4427 host
->n_io_port
= acb
->io_port_len
;
4428 host
->dma_channel
= -1;
4429 host
->unique_id
= acb
->io_port_base
;
4430 host
->irq
= acb
->irq_level
;
4431 acb
->last_reset
= jiffies
;
4434 if (host
->max_id
- 1 == eeprom
->scsi_id
)
4437 #ifdef CONFIG_SCSI_MULTI_LUN
4438 if (eeprom
->channel_cfg
& NAC_SCANLUN
)
4450 * adapter_init_chip - Get the chip into a know state and figure out
4451 * some of the settings that apply to this adapter.
4453 * The io port in the adapter needs to have been set before calling
4454 * this function. The config will be configured correctly on return.
4456 * @acb: The adapter which we are to init.
4458 static void adapter_init_chip(struct AdapterCtlBlk
*acb
)
4460 struct NvRamType
*eeprom
= &acb
->eeprom
;
4462 /* Mask all the interrupt */
4463 DC395x_write8(acb
, TRM_S1040_DMA_INTEN
, 0x00);
4464 DC395x_write8(acb
, TRM_S1040_SCSI_INTEN
, 0x00);
4466 /* Reset SCSI module */
4467 DC395x_write16(acb
, TRM_S1040_SCSI_CONTROL
, DO_RSTMODULE
);
4469 /* Reset PCI/DMA module */
4470 DC395x_write8(acb
, TRM_S1040_DMA_CONTROL
, DMARESETMODULE
);
4473 /* program configuration 0 */
4474 acb
->config
= HCC_AUTOTERM
| HCC_PARITY
;
4475 if (DC395x_read8(acb
, TRM_S1040_GEN_STATUS
) & WIDESCSI
)
4476 acb
->config
|= HCC_WIDE_CARD
;
4478 if (eeprom
->channel_cfg
& NAC_POWERON_SCSI_RESET
)
4479 acb
->config
|= HCC_SCSI_RESET
;
4481 if (acb
->config
& HCC_SCSI_RESET
) {
4482 dprintkl(KERN_INFO
, "Performing initial SCSI bus reset\n");
4483 DC395x_write8(acb
, TRM_S1040_SCSI_CONTROL
, DO_RSTSCSI
);
4485 /*while (!( DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET )); */
4486 /*spin_unlock_irq (&io_request_lock); */
4491 HZ
* acb
->eeprom
.delay_time
;
4493 /*spin_lock_irq (&io_request_lock); */
4499 * init_adapter - Grab the resource for the card, setup the adapter
4500 * information, set the card into a known state, create the various
4501 * tables etc etc. This basically gets all adapter information all up
4502 * to date, initialised and gets the chip in sync with it.
4504 * @host: This hosts adapter structure
4505 * @io_port: The base I/O port
4508 * Returns 0 if the initialization succeeds, any other value on
4511 static int adapter_init(struct AdapterCtlBlk
*acb
, unsigned long io_port
,
4512 u32 io_port_len
, unsigned int irq
)
4514 if (!request_region(io_port
, io_port_len
, DC395X_NAME
)) {
4515 dprintkl(KERN_ERR
, "Failed to reserve IO region 0x%lx\n", io_port
);
4518 /* store port base to indicate we have registered it */
4519 acb
->io_port_base
= io_port
;
4520 acb
->io_port_len
= io_port_len
;
4522 if (request_irq(irq
, dc395x_interrupt
, IRQF_SHARED
, DC395X_NAME
, acb
)) {
4523 /* release the region we just claimed */
4524 dprintkl(KERN_INFO
, "Failed to register IRQ\n");
4527 /* store irq to indicate we have registered it */
4528 acb
->irq_level
= irq
;
4530 /* get eeprom configuration information and command line settings etc */
4531 check_eeprom(&acb
->eeprom
, io_port
);
4532 print_eeprom_settings(&acb
->eeprom
);
4534 /* setup adapter control block */
4535 adapter_init_params(acb
);
4537 /* display card connectors/termination settings */
4538 adapter_print_config(acb
);
4540 if (adapter_sg_tables_alloc(acb
)) {
4541 dprintkl(KERN_DEBUG
, "Memory allocation for SG tables failed\n");
4544 adapter_init_scsi_host(acb
->scsi_host
);
4545 adapter_init_chip(acb
);
4546 set_basic_config(acb
);
4549 "adapter_init: acb=%p, pdcb_map=%p psrb_array=%p "
4550 "size{acb=0x%04x dcb=0x%04x srb=0x%04x}\n",
4551 acb
, acb
->dcb_map
, acb
->srb_array
, sizeof(struct AdapterCtlBlk
),
4552 sizeof(struct DeviceCtlBlk
), sizeof(struct ScsiReqBlk
));
4557 free_irq(acb
->irq_level
, acb
);
4558 if (acb
->io_port_base
)
4559 release_region(acb
->io_port_base
, acb
->io_port_len
);
4560 adapter_sg_tables_free(acb
);
4567 * adapter_uninit_chip - cleanly shut down the scsi controller chip,
4568 * stopping all operations and disabling interrupt generation on the
4571 * @acb: The adapter which we are to shutdown.
4573 static void adapter_uninit_chip(struct AdapterCtlBlk
*acb
)
4575 /* disable interrupts */
4576 DC395x_write8(acb
, TRM_S1040_DMA_INTEN
, 0);
4577 DC395x_write8(acb
, TRM_S1040_SCSI_INTEN
, 0);
4579 /* reset the scsi bus */
4580 if (acb
->config
& HCC_SCSI_RESET
)
4581 reset_scsi_bus(acb
);
4583 /* clear any pending interrupt state */
4584 DC395x_read8(acb
, TRM_S1040_SCSI_INTSTATUS
);
4590 * adapter_uninit - Shut down the chip and release any resources that
4591 * we had allocated. Once this returns the adapter should not be used
4594 * @acb: The adapter which we are to un-initialize.
4596 static void adapter_uninit(struct AdapterCtlBlk
*acb
)
4598 unsigned long flags
;
4599 DC395x_LOCK_IO(acb
->scsi_host
, flags
);
4602 if (timer_pending(&acb
->waiting_timer
))
4603 del_timer(&acb
->waiting_timer
);
4604 if (timer_pending(&acb
->selto_timer
))
4605 del_timer(&acb
->selto_timer
);
4607 adapter_uninit_chip(acb
);
4608 adapter_remove_and_free_all_devices(acb
);
4609 DC395x_UNLOCK_IO(acb
->scsi_host
, flags
);
4612 free_irq(acb
->irq_level
, acb
);
4613 if (acb
->io_port_base
)
4614 release_region(acb
->io_port_base
, acb
->io_port_len
);
4616 adapter_sg_tables_free(acb
);
4621 #define SPRINTF(args...) seq_printf(m,##args)
4625 if (YN) SPRINTF(" Yes ");\
4626 else SPRINTF(" No ")
4628 static int dc395x_show_info(struct seq_file
*m
, struct Scsi_Host
*host
)
4630 struct AdapterCtlBlk
*acb
= (struct AdapterCtlBlk
*)host
->hostdata
;
4632 struct DeviceCtlBlk
*dcb
;
4633 unsigned long flags
;
4636 SPRINTF(DC395X_BANNER
" PCI SCSI Host Adapter\n");
4637 SPRINTF(" Driver Version " DC395X_VERSION
"\n");
4639 DC395x_LOCK_IO(acb
->scsi_host
, flags
);
4641 SPRINTF("SCSI Host Nr %i, ", host
->host_no
);
4642 SPRINTF("DC395U/UW/F DC315/U %s\n",
4643 (acb
->config
& HCC_WIDE_CARD
) ? "Wide" : "");
4644 SPRINTF("io_port_base 0x%04lx, ", acb
->io_port_base
);
4645 SPRINTF("irq_level 0x%04x, ", acb
->irq_level
);
4646 SPRINTF(" SelTimeout %ims\n", (1638 * acb
->sel_timeout
) / 1000);
4648 SPRINTF("MaxID %i, MaxLUN %i, ", host
->max_id
, host
->max_lun
);
4649 SPRINTF("AdapterID %i\n", host
->this_id
);
4651 SPRINTF("tag_max_num %i", acb
->tag_max_num
);
4652 /*SPRINTF(", DMA_Status %i\n", DC395x_read8(acb, TRM_S1040_DMA_STATUS)); */
4653 SPRINTF(", FilterCfg 0x%02x",
4654 DC395x_read8(acb
, TRM_S1040_SCSI_CONFIG1
));
4655 SPRINTF(", DelayReset %is\n", acb
->eeprom
.delay_time
);
4658 SPRINTF("Nr of DCBs: %i\n", list_size(&acb
->dcb_list
));
4660 ("Map of attached LUNs: %02x %02x %02x %02x %02x %02x %02x %02x\n",
4661 acb
->dcb_map
[0], acb
->dcb_map
[1], acb
->dcb_map
[2],
4662 acb
->dcb_map
[3], acb
->dcb_map
[4], acb
->dcb_map
[5],
4663 acb
->dcb_map
[6], acb
->dcb_map
[7]);
4665 (" %02x %02x %02x %02x %02x %02x %02x %02x\n",
4666 acb
->dcb_map
[8], acb
->dcb_map
[9], acb
->dcb_map
[10],
4667 acb
->dcb_map
[11], acb
->dcb_map
[12], acb
->dcb_map
[13],
4668 acb
->dcb_map
[14], acb
->dcb_map
[15]);
4671 ("Un ID LUN Prty Sync Wide DsCn SndS TagQ nego_period SyncFreq SyncOffs MaxCmd\n");
4674 list_for_each_entry(dcb
, &acb
->dcb_list
, list
) {
4676 SPRINTF("%02i %02i %02i ", dev
, dcb
->target_id
,
4678 YESNO(dcb
->dev_mode
& NTC_DO_PARITY_CHK
);
4679 YESNO(dcb
->sync_offset
);
4680 YESNO(dcb
->sync_period
& WIDE_SYNC
);
4681 YESNO(dcb
->dev_mode
& NTC_DO_DISCONNECT
);
4682 YESNO(dcb
->dev_mode
& NTC_DO_SEND_START
);
4683 YESNO(dcb
->sync_mode
& EN_TAG_QUEUEING
);
4684 nego_period
= clock_period
[dcb
->sync_period
& 0x07] << 2;
4685 if (dcb
->sync_offset
)
4686 SPRINTF(" %03i ns ", nego_period
);
4688 SPRINTF(" (%03i ns)", (dcb
->min_nego_period
<< 2));
4690 if (dcb
->sync_offset
& 0x0f) {
4691 spd
= 1000 / (nego_period
);
4692 spd1
= 1000 % (nego_period
);
4693 spd1
= (spd1
* 10 + nego_period
/ 2) / (nego_period
);
4694 SPRINTF(" %2i.%1i M %02i ", spd
, spd1
,
4695 (dcb
->sync_offset
& 0x0f));
4699 /* Add more info ... */
4700 SPRINTF(" %02i\n", dcb
->max_command
);
4704 if (timer_pending(&acb
->waiting_timer
))
4705 SPRINTF("Waiting queue timer running\n");
4709 list_for_each_entry(dcb
, &acb
->dcb_list
, list
) {
4710 struct ScsiReqBlk
*srb
;
4711 if (!list_empty(&dcb
->srb_waiting_list
))
4712 SPRINTF("DCB (%02i-%i): Waiting: %i:",
4713 dcb
->target_id
, dcb
->target_lun
,
4714 list_size(&dcb
->srb_waiting_list
));
4715 list_for_each_entry(srb
, &dcb
->srb_waiting_list
, list
)
4716 SPRINTF(" %p", srb
->cmd
);
4717 if (!list_empty(&dcb
->srb_going_list
))
4718 SPRINTF("\nDCB (%02i-%i): Going : %i:",
4719 dcb
->target_id
, dcb
->target_lun
,
4720 list_size(&dcb
->srb_going_list
));
4721 list_for_each_entry(srb
, &dcb
->srb_going_list
, list
)
4722 SPRINTF(" %p", srb
->cmd
);
4723 if (!list_empty(&dcb
->srb_waiting_list
) || !list_empty(&dcb
->srb_going_list
))
4727 if (debug_enabled(DBG_1
)) {
4728 SPRINTF("DCB list for ACB %p:\n", acb
);
4729 list_for_each_entry(dcb
, &acb
->dcb_list
, list
) {
4730 SPRINTF("%p -> ", dcb
);
4735 DC395x_UNLOCK_IO(acb
->scsi_host
, flags
);
4740 static struct scsi_host_template dc395x_driver_template
= {
4741 .module
= THIS_MODULE
,
4742 .proc_name
= DC395X_NAME
,
4743 .show_info
= dc395x_show_info
,
4744 .name
= DC395X_BANNER
" " DC395X_VERSION
,
4745 .queuecommand
= dc395x_queue_command
,
4746 .bios_param
= dc395x_bios_param
,
4747 .slave_alloc
= dc395x_slave_alloc
,
4748 .slave_destroy
= dc395x_slave_destroy
,
4749 .can_queue
= DC395x_MAX_CAN_QUEUE
,
4751 .sg_tablesize
= DC395x_MAX_SG_TABLESIZE
,
4752 .cmd_per_lun
= DC395x_MAX_CMD_PER_LUN
,
4753 .eh_abort_handler
= dc395x_eh_abort
,
4754 .eh_bus_reset_handler
= dc395x_eh_bus_reset
,
4755 .use_clustering
= DISABLE_CLUSTERING
,
4760 * banner_display - Display banner on first instance of driver
4763 static void banner_display(void)
4765 static int banner_done
= 0;
4768 dprintkl(KERN_INFO
, "%s %s\n", DC395X_BANNER
, DC395X_VERSION
);
4775 * dc395x_init_one - Initialise a single instance of the adapter.
4777 * The PCI layer will call this once for each instance of the adapter
4778 * that it finds in the system. The pci_dev strcuture indicates which
4779 * instance we are being called from.
4781 * @dev: The PCI device to initialize.
4782 * @id: Looks like a pointer to the entry in our pci device table
4783 * that was actually matched by the PCI subsystem.
4785 * Returns 0 on success, or an error code (-ve) on failure.
4787 static int dc395x_init_one(struct pci_dev
*dev
, const struct pci_device_id
*id
)
4789 struct Scsi_Host
*scsi_host
= NULL
;
4790 struct AdapterCtlBlk
*acb
= NULL
;
4791 unsigned long io_port_base
;
4792 unsigned int io_port_len
;
4795 dprintkdbg(DBG_0
, "Init one instance (%s)\n", pci_name(dev
));
4798 if (pci_enable_device(dev
))
4800 dprintkl(KERN_INFO
, "PCI Enable device failed.\n");
4803 io_port_base
= pci_resource_start(dev
, 0) & PCI_BASE_ADDRESS_IO_MASK
;
4804 io_port_len
= pci_resource_len(dev
, 0);
4806 dprintkdbg(DBG_0
, "IO_PORT=0x%04lx, IRQ=0x%x\n", io_port_base
, dev
->irq
);
4808 /* allocate scsi host information (includes out adapter) */
4809 scsi_host
= scsi_host_alloc(&dc395x_driver_template
,
4810 sizeof(struct AdapterCtlBlk
));
4812 dprintkl(KERN_INFO
, "scsi_host_alloc failed\n");
4815 acb
= (struct AdapterCtlBlk
*)scsi_host
->hostdata
;
4816 acb
->scsi_host
= scsi_host
;
4819 /* initialise the adapter and everything we need */
4820 if (adapter_init(acb
, io_port_base
, io_port_len
, irq
)) {
4821 dprintkl(KERN_INFO
, "adapter init failed\n");
4825 pci_set_master(dev
);
4827 /* get the scsi mid level to scan for new devices on the bus */
4828 if (scsi_add_host(scsi_host
, &dev
->dev
)) {
4829 dprintkl(KERN_ERR
, "scsi_add_host failed\n");
4832 pci_set_drvdata(dev
, scsi_host
);
4833 scsi_scan_host(scsi_host
);
4839 adapter_uninit(acb
);
4840 if (scsi_host
!= NULL
)
4841 scsi_host_put(scsi_host
);
4842 pci_disable_device(dev
);
4848 * dc395x_remove_one - Called to remove a single instance of the
4851 * @dev: The PCI device to initialize.
4853 static void dc395x_remove_one(struct pci_dev
*dev
)
4855 struct Scsi_Host
*scsi_host
= pci_get_drvdata(dev
);
4856 struct AdapterCtlBlk
*acb
= (struct AdapterCtlBlk
*)(scsi_host
->hostdata
);
4858 dprintkdbg(DBG_0
, "dc395x_remove_one: acb=%p\n", acb
);
4860 scsi_remove_host(scsi_host
);
4861 adapter_uninit(acb
);
4862 pci_disable_device(dev
);
4863 scsi_host_put(scsi_host
);
4864 pci_set_drvdata(dev
, NULL
);
4868 static struct pci_device_id dc395x_pci_table
[] = {
4870 .vendor
= PCI_VENDOR_ID_TEKRAM
,
4871 .device
= PCI_DEVICE_ID_TEKRAM_TRMS1040
,
4872 .subvendor
= PCI_ANY_ID
,
4873 .subdevice
= PCI_ANY_ID
,
4875 {} /* Terminating entry */
4877 MODULE_DEVICE_TABLE(pci
, dc395x_pci_table
);
4880 static struct pci_driver dc395x_driver
= {
4881 .name
= DC395X_NAME
,
4882 .id_table
= dc395x_pci_table
,
4883 .probe
= dc395x_init_one
,
4884 .remove
= dc395x_remove_one
,
4889 * dc395x_module_init - Module initialization function
4891 * Used by both module and built-in driver to initialise this driver.
4893 static int __init
dc395x_module_init(void)
4895 return pci_register_driver(&dc395x_driver
);
4900 * dc395x_module_exit - Module cleanup function.
4902 static void __exit
dc395x_module_exit(void)
4904 pci_unregister_driver(&dc395x_driver
);
4908 module_init(dc395x_module_init
);
4909 module_exit(dc395x_module_exit
);
4911 MODULE_AUTHOR("C.L. Huang / Erich Chen / Kurt Garloff");
4912 MODULE_DESCRIPTION("SCSI host adapter driver for Tekram TRM-S1040 based adapters: Tekram DC395 and DC315 series");
4913 MODULE_LICENSE("GPL");