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1 /*
2  * dc395x.c
3  *
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)
7  *
8  * Authors:
9  *  C.L. Huang <ching@tekram.com.tw>
10  *  Erich Chen <erich@tekram.com.tw>
11  *  (C) Copyright 1995-1999 Tekram Technology Co., Ltd.
12  *
13  *  Kurt Garloff <garloff@suse.de>
14  *  (C) 1999-2000 Kurt Garloff
15  *
16  *  Oliver Neukum <oliver@neukum.name>
17  *  Ali Akcaagac <aliakc@web.de>
18  *  Jamie Lenehan <lenehan@twibble.org>
19  *  (C) 2003
20  *
21  * License: GNU GPL
22  *
23  *************************************************************************
24  *
25  * Redistribution and use in source and binary forms, with or without
26  * modification, are permitted provided that the following conditions
27  * are met:
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.
35  *
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.
46  *
47  ************************************************************************
48  */
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>
61 #include <asm/io.h>
62 
63 #include <scsi/scsi.h>
64 #include <scsi/scsi_cmnd.h>
65 #include <scsi/scsi_device.h>
66 #include <scsi/scsi_host.h>
67 
68 #include "dc395x.h"
69 
70 #define DC395X_NAME	"dc395x"
71 #define DC395X_BANNER	"Tekram DC395(U/UW/F), DC315(U) - ASIC TRM-S1040"
72 #define DC395X_VERSION	"v2.05, 2004/03/08"
73 
74 /*---------------------------------------------------------------------------
75                                   Features
76  ---------------------------------------------------------------------------*/
77 /*
78  * Set to disable parts of the driver
79  */
80 /*#define DC395x_NO_DISCONNECT*/
81 /*#define DC395x_NO_TAGQ*/
82 /*#define DC395x_NO_SYNC*/
83 /*#define DC395x_NO_WIDE*/
84 
85 /*---------------------------------------------------------------------------
86                                   Debugging
87  ---------------------------------------------------------------------------*/
88 /*
89  * Types of debugging that can be enabled and disabled
90  */
91 #define DBG_KG		0x0001
92 #define DBG_0		0x0002
93 #define DBG_1		0x0004
94 #define DBG_SG		0x0020
95 #define DBG_FIFO	0x0040
96 #define DBG_PIO		0x0080
97 
98 
99 /*
100  * Set set of things to output debugging for.
101  * Undefine to remove all debugging
102  */
103 /*#define DEBUG_MASK (DBG_0|DBG_1|DBG_SG|DBG_FIFO|DBG_PIO)*/
104 /*#define  DEBUG_MASK	DBG_0*/
105 
106 
107 /*
108  * Output a kernel mesage at the specified level and append the
109  * driver name and a ": " to the start of the message
110  */
111 #define dprintkl(level, format, arg...)  \
112     printk(level DC395X_NAME ": " format , ## arg)
113 
114 
115 #ifdef DEBUG_MASK
116 /*
117  * print a debug message - this is formated with KERN_DEBUG, then the
118  * driver name followed by a ": " and then the message is output.
119  * This also checks that the specified debug level is enabled before
120  * outputing the message
121  */
122 #define dprintkdbg(type, format, arg...) \
123 	do { \
124 		if ((type) & (DEBUG_MASK)) \
125 			dprintkl(KERN_DEBUG , format , ## arg); \
126 	} while (0)
127 
128 /*
129  * Check if the specified type of debugging is enabled
130  */
131 #define debug_enabled(type)	((DEBUG_MASK) & (type))
132 
133 #else
134 /*
135  * No debugging. Do nothing
136  */
137 #define dprintkdbg(type, format, arg...) \
138 	do {} while (0)
139 #define debug_enabled(type)	(0)
140 
141 #endif
142 
143 
144 #ifndef PCI_VENDOR_ID_TEKRAM
145 #define PCI_VENDOR_ID_TEKRAM                    0x1DE1	/* Vendor ID    */
146 #endif
147 #ifndef PCI_DEVICE_ID_TEKRAM_TRMS1040
148 #define PCI_DEVICE_ID_TEKRAM_TRMS1040           0x0391	/* Device ID    */
149 #endif
150 
151 
152 #define DC395x_LOCK_IO(dev,flags)		spin_lock_irqsave(((struct Scsi_Host *)dev)->host_lock, flags)
153 #define DC395x_UNLOCK_IO(dev,flags)		spin_unlock_irqrestore(((struct Scsi_Host *)dev)->host_lock, flags)
154 
155 #define DC395x_read8(acb,address)		(u8)(inb(acb->io_port_base + (address)))
156 #define DC395x_read16(acb,address)		(u16)(inw(acb->io_port_base + (address)))
157 #define DC395x_read32(acb,address)		(u32)(inl(acb->io_port_base + (address)))
158 #define DC395x_write8(acb,address,value)	outb((value), acb->io_port_base + (address))
159 #define DC395x_write16(acb,address,value)	outw((value), acb->io_port_base + (address))
160 #define DC395x_write32(acb,address,value)	outl((value), acb->io_port_base + (address))
161 
162 /* cmd->result */
163 #define RES_TARGET		0x000000FF	/* Target State */
164 #define RES_TARGET_LNX  STATUS_MASK	/* Only official ... */
165 #define RES_ENDMSG		0x0000FF00	/* End Message */
166 #define RES_DID			0x00FF0000	/* DID_ codes */
167 #define RES_DRV			0xFF000000	/* DRIVER_ codes */
168 
169 #define MK_RES(drv,did,msg,tgt) ((int)(drv)<<24 | (int)(did)<<16 | (int)(msg)<<8 | (int)(tgt))
170 #define MK_RES_LNX(drv,did,msg,tgt) ((int)(drv)<<24 | (int)(did)<<16 | (int)(msg)<<8 | (int)(tgt)<<1)
171 
172 #define SET_RES_TARGET(who,tgt) { who &= ~RES_TARGET; who |= (int)(tgt); }
173 #define SET_RES_TARGET_LNX(who,tgt) { who &= ~RES_TARGET_LNX; who |= (int)(tgt) << 1; }
174 #define SET_RES_MSG(who,msg) { who &= ~RES_ENDMSG; who |= (int)(msg) << 8; }
175 #define SET_RES_DID(who,did) { who &= ~RES_DID; who |= (int)(did) << 16; }
176 #define SET_RES_DRV(who,drv) { who &= ~RES_DRV; who |= (int)(drv) << 24; }
177 
178 #define TAG_NONE 255
179 
180 /*
181  * srb->segement_x is the hw sg list. It is always allocated as a
182  * DC395x_MAX_SG_LISTENTRY entries in a linear block which does not
183  * cross a page boundy.
184  */
185 #define SEGMENTX_LEN	(sizeof(struct SGentry)*DC395x_MAX_SG_LISTENTRY)
186 
187 
188 struct SGentry {
189 	u32 address;		/* bus! address */
190 	u32 length;
191 };
192 
193 /* The SEEPROM structure for TRM_S1040 */
194 struct NVRamTarget {
195 	u8 cfg0;		/* Target configuration byte 0  */
196 	u8 period;		/* Target period                */
197 	u8 cfg2;		/* Target configuration byte 2  */
198 	u8 cfg3;		/* Target configuration byte 3  */
199 };
200 
201 struct NvRamType {
202 	u8 sub_vendor_id[2];	/* 0,1  Sub Vendor ID   */
203 	u8 sub_sys_id[2];	/* 2,3  Sub System ID   */
204 	u8 sub_class;		/* 4    Sub Class       */
205 	u8 vendor_id[2];	/* 5,6  Vendor ID       */
206 	u8 device_id[2];	/* 7,8  Device ID       */
207 	u8 reserved;		/* 9    Reserved        */
208 	struct NVRamTarget target[DC395x_MAX_SCSI_ID];
209 						/** 10,11,12,13
210 						 ** 14,15,16,17
211 						 ** ....
212 						 ** ....
213 						 ** 70,71,72,73
214 						 */
215 	u8 scsi_id;		/* 74 Host Adapter SCSI ID      */
216 	u8 channel_cfg;		/* 75 Channel configuration     */
217 	u8 delay_time;		/* 76 Power on delay time       */
218 	u8 max_tag;		/* 77 Maximum tags              */
219 	u8 reserved0;		/* 78  */
220 	u8 boot_target;		/* 79  */
221 	u8 boot_lun;		/* 80  */
222 	u8 reserved1;		/* 81  */
223 	u16 reserved2[22];	/* 82,..125 */
224 	u16 cksum;		/* 126,127 */
225 };
226 
227 struct ScsiReqBlk {
228 	struct list_head list;		/* next/prev ptrs for srb lists */
229 	struct DeviceCtlBlk *dcb;
230 	struct scsi_cmnd *cmd;
231 
232 	struct SGentry *segment_x;	/* Linear array of hw sg entries (up to 64 entries) */
233 	dma_addr_t sg_bus_addr;	        /* Bus address of sg list (ie, of segment_x) */
234 
235 	u8 sg_count;			/* No of HW sg entries for this request */
236 	u8 sg_index;			/* Index of HW sg entry for this request */
237 	size_t total_xfer_length;	/* Total number of bytes remaining to be transferred */
238 	size_t request_length;		/* Total number of bytes in this request */
239 	/*
240 	 * The sense buffer handling function, request_sense, uses
241 	 * the first hw sg entry (segment_x[0]) and the transfer
242 	 * length (total_xfer_length). While doing this it stores the
243 	 * original values into the last sg hw list
244 	 * (srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1] and the
245 	 * total_xfer_length in xferred. These values are restored in
246 	 * pci_unmap_srb_sense. This is the only place xferred is used.
247 	 */
248 	size_t xferred;		        /* Saved copy of total_xfer_length */
249 
250 	u16 state;
251 
252 	u8 msgin_buf[6];
253 	u8 msgout_buf[6];
254 
255 	u8 adapter_status;
256 	u8 target_status;
257 	u8 msg_count;
258 	u8 end_message;
259 
260 	u8 tag_number;
261 	u8 status;
262 	u8 retry_count;
263 	u8 flag;
264 
265 	u8 scsi_phase;
266 };
267 
268 struct DeviceCtlBlk {
269 	struct list_head list;		/* next/prev ptrs for the dcb list */
270 	struct AdapterCtlBlk *acb;
271 	struct list_head srb_going_list;	/* head of going srb list */
272 	struct list_head srb_waiting_list;	/* head of waiting srb list */
273 
274 	struct ScsiReqBlk *active_srb;
275 	u32 tag_mask;
276 
277 	u16 max_command;
278 
279 	u8 target_id;		/* SCSI Target ID  (SCSI Only) */
280 	u8 target_lun;		/* SCSI Log.  Unit (SCSI Only) */
281 	u8 identify_msg;
282 	u8 dev_mode;
283 
284 	u8 inquiry7;		/* To store Inquiry flags */
285 	u8 sync_mode;		/* 0:async mode */
286 	u8 min_nego_period;	/* for nego. */
287 	u8 sync_period;		/* for reg.  */
288 
289 	u8 sync_offset;		/* for reg. and nego.(low nibble) */
290 	u8 flag;
291 	u8 dev_type;
292 	u8 init_tcq_flag;
293 };
294 
295 struct AdapterCtlBlk {
296 	struct Scsi_Host *scsi_host;
297 
298 	unsigned long io_port_base;
299 	unsigned long io_port_len;
300 
301 	struct list_head dcb_list;		/* head of going dcb list */
302 	struct DeviceCtlBlk *dcb_run_robin;
303 	struct DeviceCtlBlk *active_dcb;
304 
305 	struct list_head srb_free_list;		/* head of free srb list */
306 	struct ScsiReqBlk *tmp_srb;
307 	struct timer_list waiting_timer;
308 	struct timer_list selto_timer;
309 
310 	unsigned long last_reset;
311 
312 	u16 srb_count;
313 
314 	u8 sel_timeout;
315 
316 	unsigned int irq_level;
317 	u8 tag_max_num;
318 	u8 acb_flag;
319 	u8 gmode2;
320 
321 	u8 config;
322 	u8 lun_chk;
323 	u8 scan_devices;
324 	u8 hostid_bit;
325 
326 	u8 dcb_map[DC395x_MAX_SCSI_ID];
327 	struct DeviceCtlBlk *children[DC395x_MAX_SCSI_ID][32];
328 
329 	struct pci_dev *dev;
330 
331 	u8 msg_len;
332 
333 	struct ScsiReqBlk srb_array[DC395x_MAX_SRB_CNT];
334 	struct ScsiReqBlk srb;
335 
336 	struct NvRamType eeprom;	/* eeprom settings for this adapter */
337 };
338 
339 
340 /*---------------------------------------------------------------------------
341                             Forward declarations
342  ---------------------------------------------------------------------------*/
343 static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
344 		u16 *pscsi_status);
345 static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
346 		u16 *pscsi_status);
347 static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
348 		u16 *pscsi_status);
349 static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
350 		u16 *pscsi_status);
351 static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
352 		u16 *pscsi_status);
353 static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
354 		u16 *pscsi_status);
355 static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
356 		u16 *pscsi_status);
357 static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
358 		u16 *pscsi_status);
359 static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
360 		u16 *pscsi_status);
361 static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
362 		u16 *pscsi_status);
363 static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
364 		u16 *pscsi_status);
365 static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
366 		u16 *pscsi_status);
367 static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
368 		u16 *pscsi_status);
369 static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
370 		u16 *pscsi_status);
371 static void set_basic_config(struct AdapterCtlBlk *acb);
372 static void cleanup_after_transfer(struct AdapterCtlBlk *acb,
373 		struct ScsiReqBlk *srb);
374 static void reset_scsi_bus(struct AdapterCtlBlk *acb);
375 static void data_io_transfer(struct AdapterCtlBlk *acb,
376 		struct ScsiReqBlk *srb, u16 io_dir);
377 static void disconnect(struct AdapterCtlBlk *acb);
378 static void reselect(struct AdapterCtlBlk *acb);
379 static u8 start_scsi(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
380 		struct ScsiReqBlk *srb);
381 static inline void enable_msgout_abort(struct AdapterCtlBlk *acb,
382 		struct ScsiReqBlk *srb);
383 static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb,
384 		struct ScsiReqBlk *srb);
385 static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_code,
386 		struct scsi_cmnd *cmd, u8 force);
387 static void scsi_reset_detect(struct AdapterCtlBlk *acb);
388 static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb);
389 static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb,
390 		struct ScsiReqBlk *srb);
391 static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
392 		struct ScsiReqBlk *srb);
393 static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
394 		struct ScsiReqBlk *srb);
395 static void set_xfer_rate(struct AdapterCtlBlk *acb,
396 		struct DeviceCtlBlk *dcb);
397 static void waiting_timeout(struct timer_list *t);
398 
399 
400 /*---------------------------------------------------------------------------
401                                  Static Data
402  ---------------------------------------------------------------------------*/
403 static u16 current_sync_offset = 0;
404 
405 static void *dc395x_scsi_phase0[] = {
406 	data_out_phase0,/* phase:0 */
407 	data_in_phase0,	/* phase:1 */
408 	command_phase0,	/* phase:2 */
409 	status_phase0,	/* phase:3 */
410 	nop0,		/* phase:4 PH_BUS_FREE .. initial phase */
411 	nop0,		/* phase:5 PH_BUS_FREE .. initial phase */
412 	msgout_phase0,	/* phase:6 */
413 	msgin_phase0,	/* phase:7 */
414 };
415 
416 static void *dc395x_scsi_phase1[] = {
417 	data_out_phase1,/* phase:0 */
418 	data_in_phase1,	/* phase:1 */
419 	command_phase1,	/* phase:2 */
420 	status_phase1,	/* phase:3 */
421 	nop1,		/* phase:4 PH_BUS_FREE .. initial phase */
422 	nop1,		/* phase:5 PH_BUS_FREE .. initial phase */
423 	msgout_phase1,	/* phase:6 */
424 	msgin_phase1,	/* phase:7 */
425 };
426 
427 /*
428  *Fast20:	000	 50ns, 20.0 MHz
429  *		001	 75ns, 13.3 MHz
430  *		010	100ns, 10.0 MHz
431  *		011	125ns,  8.0 MHz
432  *		100	150ns,  6.6 MHz
433  *		101	175ns,  5.7 MHz
434  *		110	200ns,  5.0 MHz
435  *		111	250ns,  4.0 MHz
436  *
437  *Fast40(LVDS):	000	 25ns, 40.0 MHz
438  *		001	 50ns, 20.0 MHz
439  *		010	 75ns, 13.3 MHz
440  *		011	100ns, 10.0 MHz
441  *		100	125ns,  8.0 MHz
442  *		101	150ns,  6.6 MHz
443  *		110	175ns,  5.7 MHz
444  *		111	200ns,  5.0 MHz
445  */
446 /*static u8	clock_period[] = {12,19,25,31,37,44,50,62};*/
447 
448 /* real period:48ns,76ns,100ns,124ns,148ns,176ns,200ns,248ns */
449 static u8 clock_period[] = { 12, 18, 25, 31, 37, 43, 50, 62 };
450 static u16 clock_speed[] = { 200, 133, 100, 80, 67, 58, 50, 40 };
451 
452 
453 /*---------------------------------------------------------------------------
454                                 Configuration
455   ---------------------------------------------------------------------------*/
456 /*
457  * Module/boot parameters currently effect *all* instances of the
458  * card in the system.
459  */
460 
461 /*
462  * Command line parameters are stored in a structure below.
463  * These are the index's into the structure for the various
464  * command line options.
465  */
466 #define CFG_ADAPTER_ID		0
467 #define CFG_MAX_SPEED		1
468 #define CFG_DEV_MODE		2
469 #define CFG_ADAPTER_MODE	3
470 #define CFG_TAGS		4
471 #define CFG_RESET_DELAY		5
472 
473 #define CFG_NUM			6	/* number of configuration items */
474 
475 
476 /*
477  * Value used to indicate that a command line override
478  * hasn't been used to modify the value.
479  */
480 #define CFG_PARAM_UNSET -1
481 
482 
483 /*
484  * Hold command line parameters.
485  */
486 struct ParameterData {
487 	int value;		/* value of this setting */
488 	int min;		/* minimum value */
489 	int max;		/* maximum value */
490 	int def;		/* default value */
491 	int safe;		/* safe value */
492 };
493 static struct ParameterData cfg_data[] = {
494 	{ /* adapter id */
495 		CFG_PARAM_UNSET,
496 		0,
497 		15,
498 		7,
499 		7
500 	},
501 	{ /* max speed */
502 		CFG_PARAM_UNSET,
503 		  0,
504 		  7,
505 		  1,	/* 13.3Mhz */
506 		  4,	/*  6.7Hmz */
507 	},
508 	{ /* dev mode */
509 		CFG_PARAM_UNSET,
510 		0,
511 		0x3f,
512 		NTC_DO_PARITY_CHK | NTC_DO_DISCONNECT | NTC_DO_SYNC_NEGO |
513 			NTC_DO_WIDE_NEGO | NTC_DO_TAG_QUEUEING |
514 			NTC_DO_SEND_START,
515 		NTC_DO_PARITY_CHK | NTC_DO_SEND_START
516 	},
517 	{ /* adapter mode */
518 		CFG_PARAM_UNSET,
519 		0,
520 		0x2f,
521 		NAC_SCANLUN |
522 		NAC_GT2DRIVES | NAC_GREATER_1G | NAC_POWERON_SCSI_RESET
523 			/*| NAC_ACTIVE_NEG*/,
524 		NAC_GT2DRIVES | NAC_GREATER_1G | NAC_POWERON_SCSI_RESET | 0x08
525 	},
526 	{ /* tags */
527 		CFG_PARAM_UNSET,
528 		0,
529 		5,
530 		3,	/* 16 tags (??) */
531 		2,
532 	},
533 	{ /* reset delay */
534 		CFG_PARAM_UNSET,
535 		0,
536 		180,
537 		1,	/* 1 second */
538 		10,	/* 10 seconds */
539 	}
540 };
541 
542 
543 /*
544  * Safe settings. If set to zero the BIOS/default values with
545  * command line overrides will be used. If set to 1 then safe and
546  * slow settings will be used.
547  */
548 static bool use_safe_settings = 0;
549 module_param_named(safe, use_safe_settings, bool, 0);
550 MODULE_PARM_DESC(safe, "Use safe and slow settings only. Default: false");
551 
552 
553 module_param_named(adapter_id, cfg_data[CFG_ADAPTER_ID].value, int, 0);
554 MODULE_PARM_DESC(adapter_id, "Adapter SCSI ID. Default 7 (0-15)");
555 
556 module_param_named(max_speed, cfg_data[CFG_MAX_SPEED].value, int, 0);
557 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");
558 
559 module_param_named(dev_mode, cfg_data[CFG_DEV_MODE].value, int, 0);
560 MODULE_PARM_DESC(dev_mode, "Device mode.");
561 
562 module_param_named(adapter_mode, cfg_data[CFG_ADAPTER_MODE].value, int, 0);
563 MODULE_PARM_DESC(adapter_mode, "Adapter mode.");
564 
565 module_param_named(tags, cfg_data[CFG_TAGS].value, int, 0);
566 MODULE_PARM_DESC(tags, "Number of tags (1<<x). Default 3 (0-5)");
567 
568 module_param_named(reset_delay, cfg_data[CFG_RESET_DELAY].value, int, 0);
569 MODULE_PARM_DESC(reset_delay, "Reset delay in seconds. Default 1 (0-180)");
570 
571 
572 /**
573  * set_safe_settings - if the use_safe_settings option is set then
574  * set all values to the safe and slow values.
575  **/
set_safe_settings(void)576 static void set_safe_settings(void)
577 {
578 	if (use_safe_settings)
579 	{
580 		int i;
581 
582 		dprintkl(KERN_INFO, "Using safe settings.\n");
583 		for (i = 0; i < CFG_NUM; i++)
584 		{
585 			cfg_data[i].value = cfg_data[i].safe;
586 		}
587 	}
588 }
589 
590 
591 /**
592  * fix_settings - reset any boot parameters which are out of range
593  * back to the default values.
594  **/
fix_settings(void)595 static void fix_settings(void)
596 {
597 	int i;
598 
599 	dprintkdbg(DBG_1,
600 		"setup: AdapterId=%08x MaxSpeed=%08x DevMode=%08x "
601 		"AdapterMode=%08x Tags=%08x ResetDelay=%08x\n",
602 		cfg_data[CFG_ADAPTER_ID].value,
603 		cfg_data[CFG_MAX_SPEED].value,
604 		cfg_data[CFG_DEV_MODE].value,
605 		cfg_data[CFG_ADAPTER_MODE].value,
606 		cfg_data[CFG_TAGS].value,
607 		cfg_data[CFG_RESET_DELAY].value);
608 	for (i = 0; i < CFG_NUM; i++)
609 	{
610 		if (cfg_data[i].value < cfg_data[i].min
611 		    || cfg_data[i].value > cfg_data[i].max)
612 			cfg_data[i].value = cfg_data[i].def;
613 	}
614 }
615 
616 
617 
618 /*
619  * Mapping from the eeprom delay index value (index into this array)
620  * to the number of actual seconds that the delay should be for.
621  */
622 static char eeprom_index_to_delay_map[] =
623 	{ 1, 3, 5, 10, 16, 30, 60, 120 };
624 
625 
626 /**
627  * eeprom_index_to_delay - Take the eeprom delay setting and convert it
628  * into a number of seconds.
629  *
630  * @eeprom: The eeprom structure in which we find the delay index to map.
631  **/
eeprom_index_to_delay(struct NvRamType * eeprom)632 static void eeprom_index_to_delay(struct NvRamType *eeprom)
633 {
634 	eeprom->delay_time = eeprom_index_to_delay_map[eeprom->delay_time];
635 }
636 
637 
638 /**
639  * delay_to_eeprom_index - Take a delay in seconds and return the
640  * closest eeprom index which will delay for at least that amount of
641  * seconds.
642  *
643  * @delay: The delay, in seconds, to find the eeprom index for.
644  **/
delay_to_eeprom_index(int delay)645 static int delay_to_eeprom_index(int delay)
646 {
647 	u8 idx = 0;
648 	while (idx < 7 && eeprom_index_to_delay_map[idx] < delay)
649 		idx++;
650 	return idx;
651 }
652 
653 
654 /**
655  * eeprom_override - Override the eeprom settings, in the provided
656  * eeprom structure, with values that have been set on the command
657  * line.
658  *
659  * @eeprom: The eeprom data to override with command line options.
660  **/
eeprom_override(struct NvRamType * eeprom)661 static void eeprom_override(struct NvRamType *eeprom)
662 {
663 	u8 id;
664 
665 	/* Adapter Settings */
666 	if (cfg_data[CFG_ADAPTER_ID].value != CFG_PARAM_UNSET)
667 		eeprom->scsi_id = (u8)cfg_data[CFG_ADAPTER_ID].value;
668 
669 	if (cfg_data[CFG_ADAPTER_MODE].value != CFG_PARAM_UNSET)
670 		eeprom->channel_cfg = (u8)cfg_data[CFG_ADAPTER_MODE].value;
671 
672 	if (cfg_data[CFG_RESET_DELAY].value != CFG_PARAM_UNSET)
673 		eeprom->delay_time = delay_to_eeprom_index(
674 					cfg_data[CFG_RESET_DELAY].value);
675 
676 	if (cfg_data[CFG_TAGS].value != CFG_PARAM_UNSET)
677 		eeprom->max_tag = (u8)cfg_data[CFG_TAGS].value;
678 
679 	/* Device Settings */
680 	for (id = 0; id < DC395x_MAX_SCSI_ID; id++) {
681 		if (cfg_data[CFG_DEV_MODE].value != CFG_PARAM_UNSET)
682 			eeprom->target[id].cfg0 =
683 				(u8)cfg_data[CFG_DEV_MODE].value;
684 
685 		if (cfg_data[CFG_MAX_SPEED].value != CFG_PARAM_UNSET)
686 			eeprom->target[id].period =
687 				(u8)cfg_data[CFG_MAX_SPEED].value;
688 
689 	}
690 }
691 
692 
693 /*---------------------------------------------------------------------------
694  ---------------------------------------------------------------------------*/
695 
list_size(struct list_head * head)696 static unsigned int list_size(struct list_head *head)
697 {
698 	unsigned int count = 0;
699 	struct list_head *pos;
700 	list_for_each(pos, head)
701 		count++;
702 	return count;
703 }
704 
705 
dcb_get_next(struct list_head * head,struct DeviceCtlBlk * pos)706 static struct DeviceCtlBlk *dcb_get_next(struct list_head *head,
707 		struct DeviceCtlBlk *pos)
708 {
709 	int use_next = 0;
710 	struct DeviceCtlBlk* next = NULL;
711 	struct DeviceCtlBlk* i;
712 
713 	if (list_empty(head))
714 		return NULL;
715 
716 	/* find supplied dcb and then select the next one */
717 	list_for_each_entry(i, head, list)
718 		if (use_next) {
719 			next = i;
720 			break;
721 		} else if (i == pos) {
722 			use_next = 1;
723 		}
724 	/* if no next one take the head one (ie, wraparound) */
725 	if (!next)
726         	list_for_each_entry(i, head, list) {
727         		next = i;
728         		break;
729         	}
730 
731 	return next;
732 }
733 
734 
free_tag(struct DeviceCtlBlk * dcb,struct ScsiReqBlk * srb)735 static void free_tag(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
736 {
737 	if (srb->tag_number < 255) {
738 		dcb->tag_mask &= ~(1 << srb->tag_number);	/* free tag mask */
739 		srb->tag_number = 255;
740 	}
741 }
742 
743 
744 /* Find cmd in SRB list */
find_cmd(struct scsi_cmnd * cmd,struct list_head * head)745 static inline struct ScsiReqBlk *find_cmd(struct scsi_cmnd *cmd,
746 		struct list_head *head)
747 {
748 	struct ScsiReqBlk *i;
749 	list_for_each_entry(i, head, list)
750 		if (i->cmd == cmd)
751 			return i;
752 	return NULL;
753 }
754 
755 /* Sets the timer to wake us up */
waiting_set_timer(struct AdapterCtlBlk * acb,unsigned long to)756 static void waiting_set_timer(struct AdapterCtlBlk *acb, unsigned long to)
757 {
758 	if (timer_pending(&acb->waiting_timer))
759 		return;
760 	if (time_before(jiffies + to, acb->last_reset - HZ / 2))
761 		acb->waiting_timer.expires =
762 		    acb->last_reset - HZ / 2 + 1;
763 	else
764 		acb->waiting_timer.expires = jiffies + to + 1;
765 	add_timer(&acb->waiting_timer);
766 }
767 
768 
769 /* Send the next command from the waiting list to the bus */
waiting_process_next(struct AdapterCtlBlk * acb)770 static void waiting_process_next(struct AdapterCtlBlk *acb)
771 {
772 	struct DeviceCtlBlk *start = NULL;
773 	struct DeviceCtlBlk *pos;
774 	struct DeviceCtlBlk *dcb;
775 	struct ScsiReqBlk *srb;
776 	struct list_head *dcb_list_head = &acb->dcb_list;
777 
778 	if (acb->active_dcb
779 	    || (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV)))
780 		return;
781 
782 	if (timer_pending(&acb->waiting_timer))
783 		del_timer(&acb->waiting_timer);
784 
785 	if (list_empty(dcb_list_head))
786 		return;
787 
788 	/*
789 	 * Find the starting dcb. Need to find it again in the list
790 	 * since the list may have changed since we set the ptr to it
791 	 */
792 	list_for_each_entry(dcb, dcb_list_head, list)
793 		if (dcb == acb->dcb_run_robin) {
794 			start = dcb;
795 			break;
796 		}
797 	if (!start) {
798 		/* This can happen! */
799 		start = list_entry(dcb_list_head->next, typeof(*start), list);
800 		acb->dcb_run_robin = start;
801 	}
802 
803 
804 	/*
805 	 * Loop over the dcb, but we start somewhere (potentially) in
806 	 * the middle of the loop so we need to manully do this.
807 	 */
808 	pos = start;
809 	do {
810 		struct list_head *waiting_list_head = &pos->srb_waiting_list;
811 
812 		/* Make sure, the next another device gets scheduled ... */
813 		acb->dcb_run_robin = dcb_get_next(dcb_list_head,
814 						  acb->dcb_run_robin);
815 
816 		if (list_empty(waiting_list_head) ||
817 		    pos->max_command <= list_size(&pos->srb_going_list)) {
818 			/* move to next dcb */
819 			pos = dcb_get_next(dcb_list_head, pos);
820 		} else {
821 			srb = list_entry(waiting_list_head->next,
822 					 struct ScsiReqBlk, list);
823 
824 			/* Try to send to the bus */
825 			if (!start_scsi(acb, pos, srb))
826 				list_move(&srb->list, &pos->srb_going_list);
827 			else
828 				waiting_set_timer(acb, HZ/50);
829 			break;
830 		}
831 	} while (pos != start);
832 }
833 
834 
835 /* Wake up waiting queue */
waiting_timeout(struct timer_list * t)836 static void waiting_timeout(struct timer_list *t)
837 {
838 	unsigned long flags;
839 	struct AdapterCtlBlk *acb = from_timer(acb, t, waiting_timer);
840 	dprintkdbg(DBG_1,
841 		"waiting_timeout: Queue woken up by timer. acb=%p\n", acb);
842 	DC395x_LOCK_IO(acb->scsi_host, flags);
843 	waiting_process_next(acb);
844 	DC395x_UNLOCK_IO(acb->scsi_host, flags);
845 }
846 
847 
848 /* Get the DCB for a given ID/LUN combination */
find_dcb(struct AdapterCtlBlk * acb,u8 id,u8 lun)849 static struct DeviceCtlBlk *find_dcb(struct AdapterCtlBlk *acb, u8 id, u8 lun)
850 {
851 	return acb->children[id][lun];
852 }
853 
854 
855 /* Send SCSI Request Block (srb) to adapter (acb) */
send_srb(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb)856 static void send_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
857 {
858 	struct DeviceCtlBlk *dcb = srb->dcb;
859 
860 	if (dcb->max_command <= list_size(&dcb->srb_going_list) ||
861 	    acb->active_dcb ||
862 	    (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV))) {
863 		list_add_tail(&srb->list, &dcb->srb_waiting_list);
864 		waiting_process_next(acb);
865 		return;
866 	}
867 
868 	if (!start_scsi(acb, dcb, srb)) {
869 		list_add_tail(&srb->list, &dcb->srb_going_list);
870 	} else {
871 		list_add(&srb->list, &dcb->srb_waiting_list);
872 		waiting_set_timer(acb, HZ / 50);
873 	}
874 }
875 
876 /* Prepare SRB for being sent to Device DCB w/ command *cmd */
build_srb(struct scsi_cmnd * cmd,struct DeviceCtlBlk * dcb,struct ScsiReqBlk * srb)877 static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb,
878 		struct ScsiReqBlk *srb)
879 {
880 	int nseg;
881 	enum dma_data_direction dir = cmd->sc_data_direction;
882 	dprintkdbg(DBG_0, "build_srb: (0x%p) <%02i-%i>\n",
883 		cmd, dcb->target_id, dcb->target_lun);
884 
885 	srb->dcb = dcb;
886 	srb->cmd = cmd;
887 	srb->sg_count = 0;
888 	srb->total_xfer_length = 0;
889 	srb->sg_bus_addr = 0;
890 	srb->sg_index = 0;
891 	srb->adapter_status = 0;
892 	srb->target_status = 0;
893 	srb->msg_count = 0;
894 	srb->status = 0;
895 	srb->flag = 0;
896 	srb->state = 0;
897 	srb->retry_count = 0;
898 	srb->tag_number = TAG_NONE;
899 	srb->scsi_phase = PH_BUS_FREE;	/* initial phase */
900 	srb->end_message = 0;
901 
902 	nseg = scsi_dma_map(cmd);
903 	BUG_ON(nseg < 0);
904 
905 	if (dir == DMA_NONE || !nseg) {
906 		dprintkdbg(DBG_0,
907 			"build_srb: [0] len=%d buf=%p use_sg=%d !MAP=%08x\n",
908 			   cmd->bufflen, scsi_sglist(cmd), scsi_sg_count(cmd),
909 			   srb->segment_x[0].address);
910 	} else {
911 		int i;
912 		u32 reqlen = scsi_bufflen(cmd);
913 		struct scatterlist *sg;
914 		struct SGentry *sgp = srb->segment_x;
915 
916 		srb->sg_count = nseg;
917 
918 		dprintkdbg(DBG_0,
919 			   "build_srb: [n] len=%d buf=%p use_sg=%d segs=%d\n",
920 			   reqlen, scsi_sglist(cmd), scsi_sg_count(cmd),
921 			   srb->sg_count);
922 
923 		scsi_for_each_sg(cmd, sg, srb->sg_count, i) {
924 			u32 busaddr = (u32)sg_dma_address(sg);
925 			u32 seglen = (u32)sg->length;
926 			sgp[i].address = busaddr;
927 			sgp[i].length = seglen;
928 			srb->total_xfer_length += seglen;
929 		}
930 		sgp += srb->sg_count - 1;
931 
932 		/*
933 		 * adjust last page if too big as it is allocated
934 		 * on even page boundaries
935 		 */
936 		if (srb->total_xfer_length > reqlen) {
937 			sgp->length -= (srb->total_xfer_length - reqlen);
938 			srb->total_xfer_length = reqlen;
939 		}
940 
941 		/* Fixup for WIDE padding - make sure length is even */
942 		if (dcb->sync_period & WIDE_SYNC &&
943 		    srb->total_xfer_length % 2) {
944 			srb->total_xfer_length++;
945 			sgp->length++;
946 		}
947 
948 		srb->sg_bus_addr = dma_map_single(&dcb->acb->dev->dev,
949 				srb->segment_x, SEGMENTX_LEN, DMA_TO_DEVICE);
950 
951 		dprintkdbg(DBG_SG, "build_srb: [n] map sg %p->%08x(%05x)\n",
952 			srb->segment_x, srb->sg_bus_addr, SEGMENTX_LEN);
953 	}
954 
955 	srb->request_length = srb->total_xfer_length;
956 }
957 
958 
959 /**
960  * dc395x_queue_command - queue scsi command passed from the mid
961  * layer, invoke 'done' on completion
962  *
963  * @cmd: pointer to scsi command object
964  * @done: function pointer to be invoked on completion
965  *
966  * Returns 1 if the adapter (host) is busy, else returns 0. One
967  * reason for an adapter to be busy is that the number
968  * of outstanding queued commands is already equal to
969  * struct Scsi_Host::can_queue .
970  *
971  * Required: if struct Scsi_Host::can_queue is ever non-zero
972  *           then this function is required.
973  *
974  * Locks: struct Scsi_Host::host_lock held on entry (with "irqsave")
975  *        and is expected to be held on return.
976  *
977  **/
dc395x_queue_command_lck(struct scsi_cmnd * cmd,void (* done)(struct scsi_cmnd *))978 static int dc395x_queue_command_lck(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
979 {
980 	struct DeviceCtlBlk *dcb;
981 	struct ScsiReqBlk *srb;
982 	struct AdapterCtlBlk *acb =
983 	    (struct AdapterCtlBlk *)cmd->device->host->hostdata;
984 	dprintkdbg(DBG_0, "queue_command: (0x%p) <%02i-%i> cmnd=0x%02x\n",
985 		cmd, cmd->device->id, (u8)cmd->device->lun, cmd->cmnd[0]);
986 
987 	/* Assume BAD_TARGET; will be cleared later */
988 	cmd->result = DID_BAD_TARGET << 16;
989 
990 	/* ignore invalid targets */
991 	if (cmd->device->id >= acb->scsi_host->max_id ||
992 	    cmd->device->lun >= acb->scsi_host->max_lun ||
993 	    cmd->device->lun >31) {
994 		goto complete;
995 	}
996 
997 	/* does the specified lun on the specified device exist */
998 	if (!(acb->dcb_map[cmd->device->id] & (1 << cmd->device->lun))) {
999 		dprintkl(KERN_INFO, "queue_command: Ignore target <%02i-%i>\n",
1000 			cmd->device->id, (u8)cmd->device->lun);
1001 		goto complete;
1002 	}
1003 
1004 	/* do we have a DCB for the device */
1005 	dcb = find_dcb(acb, cmd->device->id, cmd->device->lun);
1006 	if (!dcb) {
1007 		/* should never happen */
1008 		dprintkl(KERN_ERR, "queue_command: No such device <%02i-%i>",
1009 			cmd->device->id, (u8)cmd->device->lun);
1010 		goto complete;
1011 	}
1012 
1013 	/* set callback and clear result in the command */
1014 	cmd->scsi_done = done;
1015 	cmd->result = 0;
1016 
1017 	srb = list_first_entry_or_null(&acb->srb_free_list,
1018 			struct ScsiReqBlk, list);
1019 	if (!srb) {
1020 		/*
1021 		 * Return 1 since we are unable to queue this command at this
1022 		 * point in time.
1023 		 */
1024 		dprintkdbg(DBG_0, "queue_command: No free srb's\n");
1025 		return 1;
1026 	}
1027 	list_del(&srb->list);
1028 
1029 	build_srb(cmd, dcb, srb);
1030 
1031 	if (!list_empty(&dcb->srb_waiting_list)) {
1032 		/* append to waiting queue */
1033 		list_add_tail(&srb->list, &dcb->srb_waiting_list);
1034 		waiting_process_next(acb);
1035 	} else {
1036 		/* process immediately */
1037 		send_srb(acb, srb);
1038 	}
1039 	dprintkdbg(DBG_1, "queue_command: (0x%p) done\n", cmd);
1040 	return 0;
1041 
1042 complete:
1043 	/*
1044 	 * Complete the command immediatey, and then return 0 to
1045 	 * indicate that we have handled the command. This is usually
1046 	 * done when the commad is for things like non existent
1047 	 * devices.
1048 	 */
1049 	done(cmd);
1050 	return 0;
1051 }
1052 
DEF_SCSI_QCMD(dc395x_queue_command)1053 static DEF_SCSI_QCMD(dc395x_queue_command)
1054 
1055 static void dump_register_info(struct AdapterCtlBlk *acb,
1056 		struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
1057 {
1058 	u16 pstat;
1059 	struct pci_dev *dev = acb->dev;
1060 	pci_read_config_word(dev, PCI_STATUS, &pstat);
1061 	if (!dcb)
1062 		dcb = acb->active_dcb;
1063 	if (!srb && dcb)
1064 		srb = dcb->active_srb;
1065 	if (srb) {
1066 		if (!srb->cmd)
1067 			dprintkl(KERN_INFO, "dump: srb=%p cmd=%p OOOPS!\n",
1068 				srb, srb->cmd);
1069 		else
1070 			dprintkl(KERN_INFO, "dump: srb=%p cmd=%p "
1071 				 "cmnd=0x%02x <%02i-%i>\n",
1072 				srb, srb->cmd,
1073 				srb->cmd->cmnd[0], srb->cmd->device->id,
1074 				(u8)srb->cmd->device->lun);
1075 		printk("  sglist=%p cnt=%i idx=%i len=%zu\n",
1076 		       srb->segment_x, srb->sg_count, srb->sg_index,
1077 		       srb->total_xfer_length);
1078 		printk("  state=0x%04x status=0x%02x phase=0x%02x (%sconn.)\n",
1079 		       srb->state, srb->status, srb->scsi_phase,
1080 		       (acb->active_dcb) ? "" : "not");
1081 	}
1082 	dprintkl(KERN_INFO, "dump: SCSI{status=0x%04x fifocnt=0x%02x "
1083 		"signals=0x%02x irqstat=0x%02x sync=0x%02x target=0x%02x "
1084 		"rselid=0x%02x ctr=0x%08x irqen=0x%02x config=0x%04x "
1085 		"config2=0x%02x cmd=0x%02x selto=0x%02x}\n",
1086 		DC395x_read16(acb, TRM_S1040_SCSI_STATUS),
1087 		DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
1088 		DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL),
1089 		DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS),
1090 		DC395x_read8(acb, TRM_S1040_SCSI_SYNC),
1091 		DC395x_read8(acb, TRM_S1040_SCSI_TARGETID),
1092 		DC395x_read8(acb, TRM_S1040_SCSI_IDMSG),
1093 		DC395x_read32(acb, TRM_S1040_SCSI_COUNTER),
1094 		DC395x_read8(acb, TRM_S1040_SCSI_INTEN),
1095 		DC395x_read16(acb, TRM_S1040_SCSI_CONFIG0),
1096 		DC395x_read8(acb, TRM_S1040_SCSI_CONFIG2),
1097 		DC395x_read8(acb, TRM_S1040_SCSI_COMMAND),
1098 		DC395x_read8(acb, TRM_S1040_SCSI_TIMEOUT));
1099 	dprintkl(KERN_INFO, "dump: DMA{cmd=0x%04x fifocnt=0x%02x fstat=0x%02x "
1100 		"irqstat=0x%02x irqen=0x%02x cfg=0x%04x tctr=0x%08x "
1101 		"ctctr=0x%08x addr=0x%08x:0x%08x}\n",
1102 		DC395x_read16(acb, TRM_S1040_DMA_COMMAND),
1103 		DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
1104 		DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
1105 		DC395x_read8(acb, TRM_S1040_DMA_STATUS),
1106 		DC395x_read8(acb, TRM_S1040_DMA_INTEN),
1107 		DC395x_read16(acb, TRM_S1040_DMA_CONFIG),
1108 		DC395x_read32(acb, TRM_S1040_DMA_XCNT),
1109 		DC395x_read32(acb, TRM_S1040_DMA_CXCNT),
1110 		DC395x_read32(acb, TRM_S1040_DMA_XHIGHADDR),
1111 		DC395x_read32(acb, TRM_S1040_DMA_XLOWADDR));
1112 	dprintkl(KERN_INFO, "dump: gen{gctrl=0x%02x gstat=0x%02x gtmr=0x%02x} "
1113 		"pci{status=0x%04x}\n",
1114 		DC395x_read8(acb, TRM_S1040_GEN_CONTROL),
1115 		DC395x_read8(acb, TRM_S1040_GEN_STATUS),
1116 		DC395x_read8(acb, TRM_S1040_GEN_TIMER),
1117 		pstat);
1118 }
1119 
1120 
clear_fifo(struct AdapterCtlBlk * acb,char * txt)1121 static inline void clear_fifo(struct AdapterCtlBlk *acb, char *txt)
1122 {
1123 #if debug_enabled(DBG_FIFO)
1124 	u8 lines = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
1125 	u8 fifocnt = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
1126 	if (!(fifocnt & 0x40))
1127 		dprintkdbg(DBG_FIFO,
1128 			"clear_fifo: (%i bytes) on phase %02x in %s\n",
1129 			fifocnt & 0x3f, lines, txt);
1130 #endif
1131 	DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRFIFO);
1132 }
1133 
1134 
reset_dev_param(struct AdapterCtlBlk * acb)1135 static void reset_dev_param(struct AdapterCtlBlk *acb)
1136 {
1137 	struct DeviceCtlBlk *dcb;
1138 	struct NvRamType *eeprom = &acb->eeprom;
1139 	dprintkdbg(DBG_0, "reset_dev_param: acb=%p\n", acb);
1140 
1141 	list_for_each_entry(dcb, &acb->dcb_list, list) {
1142 		u8 period_index;
1143 
1144 		dcb->sync_mode &= ~(SYNC_NEGO_DONE + WIDE_NEGO_DONE);
1145 		dcb->sync_period = 0;
1146 		dcb->sync_offset = 0;
1147 
1148 		dcb->dev_mode = eeprom->target[dcb->target_id].cfg0;
1149 		period_index = eeprom->target[dcb->target_id].period & 0x07;
1150 		dcb->min_nego_period = clock_period[period_index];
1151 		if (!(dcb->dev_mode & NTC_DO_WIDE_NEGO)
1152 		    || !(acb->config & HCC_WIDE_CARD))
1153 			dcb->sync_mode &= ~WIDE_NEGO_ENABLE;
1154 	}
1155 }
1156 
1157 
1158 /*
1159  * perform a hard reset on the SCSI bus
1160  * @cmd - some command for this host (for fetching hooks)
1161  * Returns: SUCCESS (0x2002) on success, else FAILED (0x2003).
1162  */
__dc395x_eh_bus_reset(struct scsi_cmnd * cmd)1163 static int __dc395x_eh_bus_reset(struct scsi_cmnd *cmd)
1164 {
1165 	struct AdapterCtlBlk *acb =
1166 		(struct AdapterCtlBlk *)cmd->device->host->hostdata;
1167 	dprintkl(KERN_INFO,
1168 		"eh_bus_reset: (0%p) target=<%02i-%i> cmd=%p\n",
1169 		cmd, cmd->device->id, (u8)cmd->device->lun, cmd);
1170 
1171 	if (timer_pending(&acb->waiting_timer))
1172 		del_timer(&acb->waiting_timer);
1173 
1174 	/*
1175 	 * disable interrupt
1176 	 */
1177 	DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00);
1178 	DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00);
1179 	DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
1180 	DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
1181 
1182 	reset_scsi_bus(acb);
1183 	udelay(500);
1184 
1185 	/* We may be in serious trouble. Wait some seconds */
1186 	acb->last_reset =
1187 	    jiffies + 3 * HZ / 2 +
1188 	    HZ * acb->eeprom.delay_time;
1189 
1190 	/*
1191 	 * re-enable interrupt
1192 	 */
1193 	/* Clear SCSI FIFO          */
1194 	DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
1195 	clear_fifo(acb, "eh_bus_reset");
1196 	/* Delete pending IRQ */
1197 	DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
1198 	set_basic_config(acb);
1199 
1200 	reset_dev_param(acb);
1201 	doing_srb_done(acb, DID_RESET, cmd, 0);
1202 	acb->active_dcb = NULL;
1203 	acb->acb_flag = 0;	/* RESET_DETECT, RESET_DONE ,RESET_DEV */
1204 	waiting_process_next(acb);
1205 
1206 	return SUCCESS;
1207 }
1208 
dc395x_eh_bus_reset(struct scsi_cmnd * cmd)1209 static int dc395x_eh_bus_reset(struct scsi_cmnd *cmd)
1210 {
1211 	int rc;
1212 
1213 	spin_lock_irq(cmd->device->host->host_lock);
1214 	rc = __dc395x_eh_bus_reset(cmd);
1215 	spin_unlock_irq(cmd->device->host->host_lock);
1216 
1217 	return rc;
1218 }
1219 
1220 /*
1221  * abort an errant SCSI command
1222  * @cmd - command to be aborted
1223  * Returns: SUCCESS (0x2002) on success, else FAILED (0x2003).
1224  */
dc395x_eh_abort(struct scsi_cmnd * cmd)1225 static int dc395x_eh_abort(struct scsi_cmnd *cmd)
1226 {
1227 	/*
1228 	 * Look into our command queues: If it has not been sent already,
1229 	 * we remove it and return success. Otherwise fail.
1230 	 */
1231 	struct AdapterCtlBlk *acb =
1232 	    (struct AdapterCtlBlk *)cmd->device->host->hostdata;
1233 	struct DeviceCtlBlk *dcb;
1234 	struct ScsiReqBlk *srb;
1235 	dprintkl(KERN_INFO, "eh_abort: (0x%p) target=<%02i-%i> cmd=%p\n",
1236 		cmd, cmd->device->id, (u8)cmd->device->lun, cmd);
1237 
1238 	dcb = find_dcb(acb, cmd->device->id, cmd->device->lun);
1239 	if (!dcb) {
1240 		dprintkl(KERN_DEBUG, "eh_abort: No such device\n");
1241 		return FAILED;
1242 	}
1243 
1244 	srb = find_cmd(cmd, &dcb->srb_waiting_list);
1245 	if (srb) {
1246 		list_del(&srb->list);
1247 		pci_unmap_srb_sense(acb, srb);
1248 		pci_unmap_srb(acb, srb);
1249 		free_tag(dcb, srb);
1250 		list_add_tail(&srb->list, &acb->srb_free_list);
1251 		dprintkl(KERN_DEBUG, "eh_abort: Command was waiting\n");
1252 		cmd->result = DID_ABORT << 16;
1253 		return SUCCESS;
1254 	}
1255 	srb = find_cmd(cmd, &dcb->srb_going_list);
1256 	if (srb) {
1257 		dprintkl(KERN_DEBUG, "eh_abort: Command in progress\n");
1258 		/* XXX: Should abort the command here */
1259 	} else {
1260 		dprintkl(KERN_DEBUG, "eh_abort: Command not found\n");
1261 	}
1262 	return FAILED;
1263 }
1264 
1265 
1266 /* SDTR */
build_sdtr(struct AdapterCtlBlk * acb,struct DeviceCtlBlk * dcb,struct ScsiReqBlk * srb)1267 static void build_sdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
1268 		struct ScsiReqBlk *srb)
1269 {
1270 	u8 *ptr = srb->msgout_buf + srb->msg_count;
1271 	if (srb->msg_count > 1) {
1272 		dprintkl(KERN_INFO,
1273 			"build_sdtr: msgout_buf BUSY (%i: %02x %02x)\n",
1274 			srb->msg_count, srb->msgout_buf[0],
1275 			srb->msgout_buf[1]);
1276 		return;
1277 	}
1278 	if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO)) {
1279 		dcb->sync_offset = 0;
1280 		dcb->min_nego_period = 200 >> 2;
1281 	} else if (dcb->sync_offset == 0)
1282 		dcb->sync_offset = SYNC_NEGO_OFFSET;
1283 
1284 	*ptr++ = MSG_EXTENDED;	/* (01h) */
1285 	*ptr++ = 3;		/* length */
1286 	*ptr++ = EXTENDED_SDTR;	/* (01h) */
1287 	*ptr++ = dcb->min_nego_period;	/* Transfer period (in 4ns) */
1288 	*ptr++ = dcb->sync_offset;	/* Transfer period (max. REQ/ACK dist) */
1289 	srb->msg_count += 5;
1290 	srb->state |= SRB_DO_SYNC_NEGO;
1291 }
1292 
1293 
1294 /* WDTR */
build_wdtr(struct AdapterCtlBlk * acb,struct DeviceCtlBlk * dcb,struct ScsiReqBlk * srb)1295 static void build_wdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
1296 		struct ScsiReqBlk *srb)
1297 {
1298 	u8 wide = ((dcb->dev_mode & NTC_DO_WIDE_NEGO) &
1299 		   (acb->config & HCC_WIDE_CARD)) ? 1 : 0;
1300 	u8 *ptr = srb->msgout_buf + srb->msg_count;
1301 	if (srb->msg_count > 1) {
1302 		dprintkl(KERN_INFO,
1303 			"build_wdtr: msgout_buf BUSY (%i: %02x %02x)\n",
1304 			srb->msg_count, srb->msgout_buf[0],
1305 			srb->msgout_buf[1]);
1306 		return;
1307 	}
1308 	*ptr++ = MSG_EXTENDED;	/* (01h) */
1309 	*ptr++ = 2;		/* length */
1310 	*ptr++ = EXTENDED_WDTR;	/* (03h) */
1311 	*ptr++ = wide;
1312 	srb->msg_count += 4;
1313 	srb->state |= SRB_DO_WIDE_NEGO;
1314 }
1315 
1316 
1317 #if 0
1318 /* Timer to work around chip flaw: When selecting and the bus is
1319  * busy, we sometimes miss a Selection timeout IRQ */
1320 void selection_timeout_missed(unsigned long ptr);
1321 /* Sets the timer to wake us up */
1322 static void selto_timer(struct AdapterCtlBlk *acb)
1323 {
1324 	if (timer_pending(&acb->selto_timer))
1325 		return;
1326 	acb->selto_timer.function = selection_timeout_missed;
1327 	acb->selto_timer.data = (unsigned long) acb;
1328 	if (time_before
1329 	    (jiffies + HZ, acb->last_reset + HZ / 2))
1330 		acb->selto_timer.expires =
1331 		    acb->last_reset + HZ / 2 + 1;
1332 	else
1333 		acb->selto_timer.expires = jiffies + HZ + 1;
1334 	add_timer(&acb->selto_timer);
1335 }
1336 
1337 
1338 void selection_timeout_missed(unsigned long ptr)
1339 {
1340 	unsigned long flags;
1341 	struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)ptr;
1342 	struct ScsiReqBlk *srb;
1343 	dprintkl(KERN_DEBUG, "Chip forgot to produce SelTO IRQ!\n");
1344 	if (!acb->active_dcb || !acb->active_dcb->active_srb) {
1345 		dprintkl(KERN_DEBUG, "... but no cmd pending? Oops!\n");
1346 		return;
1347 	}
1348 	DC395x_LOCK_IO(acb->scsi_host, flags);
1349 	srb = acb->active_dcb->active_srb;
1350 	disconnect(acb);
1351 	DC395x_UNLOCK_IO(acb->scsi_host, flags);
1352 }
1353 #endif
1354 
1355 
start_scsi(struct AdapterCtlBlk * acb,struct DeviceCtlBlk * dcb,struct ScsiReqBlk * srb)1356 static u8 start_scsi(struct AdapterCtlBlk* acb, struct DeviceCtlBlk* dcb,
1357 		struct ScsiReqBlk* srb)
1358 {
1359 	u16 s_stat2, return_code;
1360 	u8 s_stat, scsicommand, i, identify_message;
1361 	u8 *ptr;
1362 	dprintkdbg(DBG_0, "start_scsi: (0x%p) <%02i-%i> srb=%p\n",
1363 		dcb->target_id, dcb->target_lun, srb);
1364 
1365 	srb->tag_number = TAG_NONE;	/* acb->tag_max_num: had error read in eeprom */
1366 
1367 	s_stat = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
1368 	s_stat2 = 0;
1369 	s_stat2 = DC395x_read16(acb, TRM_S1040_SCSI_STATUS);
1370 #if 1
1371 	if (s_stat & 0x20 /* s_stat2 & 0x02000 */ ) {
1372 		dprintkdbg(DBG_KG, "start_scsi: (0x%p) BUSY %02x %04x\n",
1373 			s_stat, s_stat2);
1374 		/*
1375 		 * Try anyway?
1376 		 *
1377 		 * We could, BUT: Sometimes the TRM_S1040 misses to produce a Selection
1378 		 * Timeout, a Disconnect or a Reselection IRQ, so we would be screwed!
1379 		 * (This is likely to be a bug in the hardware. Obviously, most people
1380 		 *  only have one initiator per SCSI bus.)
1381 		 * Instead let this fail and have the timer make sure the command is
1382 		 * tried again after a short time
1383 		 */
1384 		/*selto_timer (acb); */
1385 		return 1;
1386 	}
1387 #endif
1388 	if (acb->active_dcb) {
1389 		dprintkl(KERN_DEBUG, "start_scsi: (0x%p) Attempt to start a"
1390 			"command while another command (0x%p) is active.",
1391 			srb->cmd,
1392 			acb->active_dcb->active_srb ?
1393 			    acb->active_dcb->active_srb->cmd : 0);
1394 		return 1;
1395 	}
1396 	if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) {
1397 		dprintkdbg(DBG_KG, "start_scsi: (0x%p) Failed (busy)\n", srb->cmd);
1398 		return 1;
1399 	}
1400 	/* Allow starting of SCSI commands half a second before we allow the mid-level
1401 	 * to queue them again after a reset */
1402 	if (time_before(jiffies, acb->last_reset - HZ / 2)) {
1403 		dprintkdbg(DBG_KG, "start_scsi: Refuse cmds (reset wait)\n");
1404 		return 1;
1405 	}
1406 
1407 	/* Flush FIFO */
1408 	clear_fifo(acb, "start_scsi");
1409 	DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id);
1410 	DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id);
1411 	DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period);
1412 	DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset);
1413 	srb->scsi_phase = PH_BUS_FREE;	/* initial phase */
1414 
1415 	identify_message = dcb->identify_msg;
1416 	/*DC395x_TRM_write8(TRM_S1040_SCSI_IDMSG, identify_message); */
1417 	/* Don't allow disconnection for AUTO_REQSENSE: Cont.All.Cond.! */
1418 	if (srb->flag & AUTO_REQSENSE)
1419 		identify_message &= 0xBF;
1420 
1421 	if (((srb->cmd->cmnd[0] == INQUIRY)
1422 	     || (srb->cmd->cmnd[0] == REQUEST_SENSE)
1423 	     || (srb->flag & AUTO_REQSENSE))
1424 	    && (((dcb->sync_mode & WIDE_NEGO_ENABLE)
1425 		 && !(dcb->sync_mode & WIDE_NEGO_DONE))
1426 		|| ((dcb->sync_mode & SYNC_NEGO_ENABLE)
1427 		    && !(dcb->sync_mode & SYNC_NEGO_DONE)))
1428 	    && (dcb->target_lun == 0)) {
1429 		srb->msgout_buf[0] = identify_message;
1430 		srb->msg_count = 1;
1431 		scsicommand = SCMD_SEL_ATNSTOP;
1432 		srb->state = SRB_MSGOUT;
1433 #ifndef SYNC_FIRST
1434 		if (dcb->sync_mode & WIDE_NEGO_ENABLE
1435 		    && dcb->inquiry7 & SCSI_INQ_WBUS16) {
1436 			build_wdtr(acb, dcb, srb);
1437 			goto no_cmd;
1438 		}
1439 #endif
1440 		if (dcb->sync_mode & SYNC_NEGO_ENABLE
1441 		    && dcb->inquiry7 & SCSI_INQ_SYNC) {
1442 			build_sdtr(acb, dcb, srb);
1443 			goto no_cmd;
1444 		}
1445 		if (dcb->sync_mode & WIDE_NEGO_ENABLE
1446 		    && dcb->inquiry7 & SCSI_INQ_WBUS16) {
1447 			build_wdtr(acb, dcb, srb);
1448 			goto no_cmd;
1449 		}
1450 		srb->msg_count = 0;
1451 	}
1452 	/* Send identify message */
1453 	DC395x_write8(acb, TRM_S1040_SCSI_FIFO, identify_message);
1454 
1455 	scsicommand = SCMD_SEL_ATN;
1456 	srb->state = SRB_START_;
1457 #ifndef DC395x_NO_TAGQ
1458 	if ((dcb->sync_mode & EN_TAG_QUEUEING)
1459 	    && (identify_message & 0xC0)) {
1460 		/* Send Tag message */
1461 		u32 tag_mask = 1;
1462 		u8 tag_number = 0;
1463 		while (tag_mask & dcb->tag_mask
1464 		       && tag_number < dcb->max_command) {
1465 			tag_mask = tag_mask << 1;
1466 			tag_number++;
1467 		}
1468 		if (tag_number >= dcb->max_command) {
1469 			dprintkl(KERN_WARNING, "start_scsi: (0x%p) "
1470 				"Out of tags target=<%02i-%i>)\n",
1471 				srb->cmd, srb->cmd->device->id,
1472 				(u8)srb->cmd->device->lun);
1473 			srb->state = SRB_READY;
1474 			DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
1475 				       DO_HWRESELECT);
1476 			return 1;
1477 		}
1478 		/* Send Tag id */
1479 		DC395x_write8(acb, TRM_S1040_SCSI_FIFO, MSG_SIMPLE_QTAG);
1480 		DC395x_write8(acb, TRM_S1040_SCSI_FIFO, tag_number);
1481 		dcb->tag_mask |= tag_mask;
1482 		srb->tag_number = tag_number;
1483 		scsicommand = SCMD_SEL_ATN3;
1484 		srb->state = SRB_START_;
1485 	}
1486 #endif
1487 /*polling:*/
1488 	/* Send CDB ..command block ......... */
1489 	dprintkdbg(DBG_KG, "start_scsi: (0x%p) <%02i-%i> cmnd=0x%02x tag=%i\n",
1490 		srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun,
1491 		srb->cmd->cmnd[0], srb->tag_number);
1492 	if (srb->flag & AUTO_REQSENSE) {
1493 		DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE);
1494 		DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5));
1495 		DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1496 		DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1497 		DC395x_write8(acb, TRM_S1040_SCSI_FIFO, SCSI_SENSE_BUFFERSIZE);
1498 		DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1499 	} else {
1500 		ptr = (u8 *)srb->cmd->cmnd;
1501 		for (i = 0; i < srb->cmd->cmd_len; i++)
1502 			DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++);
1503 	}
1504       no_cmd:
1505 	DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
1506 		       DO_HWRESELECT | DO_DATALATCH);
1507 	if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) {
1508 		/*
1509 		 * If start_scsi return 1:
1510 		 * we caught an interrupt (must be reset or reselection ... )
1511 		 * : Let's process it first!
1512 		 */
1513 		dprintkdbg(DBG_0, "start_scsi: (0x%p) <%02i-%i> Failed - busy\n",
1514 			srb->cmd, dcb->target_id, dcb->target_lun);
1515 		srb->state = SRB_READY;
1516 		free_tag(dcb, srb);
1517 		srb->msg_count = 0;
1518 		return_code = 1;
1519 		/* This IRQ should NOT get lost, as we did not acknowledge it */
1520 	} else {
1521 		/*
1522 		 * If start_scsi returns 0:
1523 		 * we know that the SCSI processor is free
1524 		 */
1525 		srb->scsi_phase = PH_BUS_FREE;	/* initial phase */
1526 		dcb->active_srb = srb;
1527 		acb->active_dcb = dcb;
1528 		return_code = 0;
1529 		/* it's important for atn stop */
1530 		DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
1531 			       DO_DATALATCH | DO_HWRESELECT);
1532 		/* SCSI command */
1533 		DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, scsicommand);
1534 	}
1535 	return return_code;
1536 }
1537 
1538 
1539 #define DC395x_ENABLE_MSGOUT \
1540  DC395x_write16 (acb, TRM_S1040_SCSI_CONTROL, DO_SETATN); \
1541  srb->state |= SRB_MSGOUT
1542 
1543 
1544 /* abort command */
enable_msgout_abort(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb)1545 static inline void enable_msgout_abort(struct AdapterCtlBlk *acb,
1546 		struct ScsiReqBlk *srb)
1547 {
1548 	srb->msgout_buf[0] = ABORT;
1549 	srb->msg_count = 1;
1550 	DC395x_ENABLE_MSGOUT;
1551 	srb->state &= ~SRB_MSGIN;
1552 	srb->state |= SRB_MSGOUT;
1553 }
1554 
1555 
1556 /**
1557  * dc395x_handle_interrupt - Handle an interrupt that has been confirmed to
1558  *                           have been triggered for this card.
1559  *
1560  * @acb:	 a pointer to the adpter control block
1561  * @scsi_status: the status return when we checked the card
1562  **/
dc395x_handle_interrupt(struct AdapterCtlBlk * acb,u16 scsi_status)1563 static void dc395x_handle_interrupt(struct AdapterCtlBlk *acb,
1564 		u16 scsi_status)
1565 {
1566 	struct DeviceCtlBlk *dcb;
1567 	struct ScsiReqBlk *srb;
1568 	u16 phase;
1569 	u8 scsi_intstatus;
1570 	unsigned long flags;
1571 	void (*dc395x_statev)(struct AdapterCtlBlk *, struct ScsiReqBlk *,
1572 			      u16 *);
1573 
1574 	DC395x_LOCK_IO(acb->scsi_host, flags);
1575 
1576 	/* This acknowledges the IRQ */
1577 	scsi_intstatus = DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
1578 	if ((scsi_status & 0x2007) == 0x2002)
1579 		dprintkl(KERN_DEBUG,
1580 			"COP after COP completed? %04x\n", scsi_status);
1581 	if (debug_enabled(DBG_KG)) {
1582 		if (scsi_intstatus & INT_SELTIMEOUT)
1583 			dprintkdbg(DBG_KG, "handle_interrupt: Selection timeout\n");
1584 	}
1585 	/*dprintkl(KERN_DEBUG, "handle_interrupt: intstatus = 0x%02x ", scsi_intstatus); */
1586 
1587 	if (timer_pending(&acb->selto_timer))
1588 		del_timer(&acb->selto_timer);
1589 
1590 	if (scsi_intstatus & (INT_SELTIMEOUT | INT_DISCONNECT)) {
1591 		disconnect(acb);	/* bus free interrupt  */
1592 		goto out_unlock;
1593 	}
1594 	if (scsi_intstatus & INT_RESELECTED) {
1595 		reselect(acb);
1596 		goto out_unlock;
1597 	}
1598 	if (scsi_intstatus & INT_SELECT) {
1599 		dprintkl(KERN_INFO, "Host does not support target mode!\n");
1600 		goto out_unlock;
1601 	}
1602 	if (scsi_intstatus & INT_SCSIRESET) {
1603 		scsi_reset_detect(acb);
1604 		goto out_unlock;
1605 	}
1606 	if (scsi_intstatus & (INT_BUSSERVICE | INT_CMDDONE)) {
1607 		dcb = acb->active_dcb;
1608 		if (!dcb) {
1609 			dprintkl(KERN_DEBUG,
1610 				"Oops: BusService (%04x %02x) w/o ActiveDCB!\n",
1611 				scsi_status, scsi_intstatus);
1612 			goto out_unlock;
1613 		}
1614 		srb = dcb->active_srb;
1615 		if (dcb->flag & ABORT_DEV_) {
1616 			dprintkdbg(DBG_0, "MsgOut Abort Device.....\n");
1617 			enable_msgout_abort(acb, srb);
1618 		}
1619 
1620 		/* software sequential machine */
1621 		phase = (u16)srb->scsi_phase;
1622 
1623 		/*
1624 		 * 62037 or 62137
1625 		 * call  dc395x_scsi_phase0[]... "phase entry"
1626 		 * handle every phase before start transfer
1627 		 */
1628 		/* data_out_phase0,	phase:0 */
1629 		/* data_in_phase0,	phase:1 */
1630 		/* command_phase0,	phase:2 */
1631 		/* status_phase0,	phase:3 */
1632 		/* nop0,		phase:4 PH_BUS_FREE .. initial phase */
1633 		/* nop0,		phase:5 PH_BUS_FREE .. initial phase */
1634 		/* msgout_phase0,	phase:6 */
1635 		/* msgin_phase0,	phase:7 */
1636 		dc395x_statev = dc395x_scsi_phase0[phase];
1637 		dc395x_statev(acb, srb, &scsi_status);
1638 
1639 		/*
1640 		 * if there were any exception occurred scsi_status
1641 		 * will be modify to bus free phase new scsi_status
1642 		 * transfer out from ... previous dc395x_statev
1643 		 */
1644 		srb->scsi_phase = scsi_status & PHASEMASK;
1645 		phase = (u16)scsi_status & PHASEMASK;
1646 
1647 		/*
1648 		 * call  dc395x_scsi_phase1[]... "phase entry" handle
1649 		 * every phase to do transfer
1650 		 */
1651 		/* data_out_phase1,	phase:0 */
1652 		/* data_in_phase1,	phase:1 */
1653 		/* command_phase1,	phase:2 */
1654 		/* status_phase1,	phase:3 */
1655 		/* nop1,		phase:4 PH_BUS_FREE .. initial phase */
1656 		/* nop1,		phase:5 PH_BUS_FREE .. initial phase */
1657 		/* msgout_phase1,	phase:6 */
1658 		/* msgin_phase1,	phase:7 */
1659 		dc395x_statev = dc395x_scsi_phase1[phase];
1660 		dc395x_statev(acb, srb, &scsi_status);
1661 	}
1662       out_unlock:
1663 	DC395x_UNLOCK_IO(acb->scsi_host, flags);
1664 }
1665 
1666 
dc395x_interrupt(int irq,void * dev_id)1667 static irqreturn_t dc395x_interrupt(int irq, void *dev_id)
1668 {
1669 	struct AdapterCtlBlk *acb = dev_id;
1670 	u16 scsi_status;
1671 	u8 dma_status;
1672 	irqreturn_t handled = IRQ_NONE;
1673 
1674 	/*
1675 	 * Check for pending interrupt
1676 	 */
1677 	scsi_status = DC395x_read16(acb, TRM_S1040_SCSI_STATUS);
1678 	dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS);
1679 	if (scsi_status & SCSIINTERRUPT) {
1680 		/* interrupt pending - let's process it! */
1681 		dc395x_handle_interrupt(acb, scsi_status);
1682 		handled = IRQ_HANDLED;
1683 	}
1684 	else if (dma_status & 0x20) {
1685 		/* Error from the DMA engine */
1686 		dprintkl(KERN_INFO, "Interrupt from DMA engine: 0x%02x!\n", dma_status);
1687 #if 0
1688 		dprintkl(KERN_INFO, "This means DMA error! Try to handle ...\n");
1689 		if (acb->active_dcb) {
1690 			acb->active_dcb-> flag |= ABORT_DEV_;
1691 			if (acb->active_dcb->active_srb)
1692 				enable_msgout_abort(acb, acb->active_dcb->active_srb);
1693 		}
1694 		DC395x_write8(acb, TRM_S1040_DMA_CONTROL, ABORTXFER | CLRXFIFO);
1695 #else
1696 		dprintkl(KERN_INFO, "Ignoring DMA error (probably a bad thing) ...\n");
1697 		acb = NULL;
1698 #endif
1699 		handled = IRQ_HANDLED;
1700 	}
1701 
1702 	return handled;
1703 }
1704 
1705 
msgout_phase0(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb,u16 * pscsi_status)1706 static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1707 		u16 *pscsi_status)
1708 {
1709 	dprintkdbg(DBG_0, "msgout_phase0: (0x%p)\n", srb->cmd);
1710 	if (srb->state & (SRB_UNEXPECT_RESEL + SRB_ABORT_SENT))
1711 		*pscsi_status = PH_BUS_FREE;	/*.. initial phase */
1712 
1713 	DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);	/* it's important for atn stop */
1714 	srb->state &= ~SRB_MSGOUT;
1715 }
1716 
1717 
msgout_phase1(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb,u16 * pscsi_status)1718 static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1719 		u16 *pscsi_status)
1720 {
1721 	u16 i;
1722 	u8 *ptr;
1723 	dprintkdbg(DBG_0, "msgout_phase1: (0x%p)\n", srb->cmd);
1724 
1725 	clear_fifo(acb, "msgout_phase1");
1726 	if (!(srb->state & SRB_MSGOUT)) {
1727 		srb->state |= SRB_MSGOUT;
1728 		dprintkl(KERN_DEBUG,
1729 			"msgout_phase1: (0x%p) Phase unexpected\n",
1730 			srb->cmd);	/* So what ? */
1731 	}
1732 	if (!srb->msg_count) {
1733 		dprintkdbg(DBG_0, "msgout_phase1: (0x%p) NOP msg\n",
1734 			srb->cmd);
1735 		DC395x_write8(acb, TRM_S1040_SCSI_FIFO, MSG_NOP);
1736 		DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);	/* it's important for atn stop */
1737 		DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
1738 		return;
1739 	}
1740 	ptr = (u8 *)srb->msgout_buf;
1741 	for (i = 0; i < srb->msg_count; i++)
1742 		DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++);
1743 	srb->msg_count = 0;
1744 	if (srb->msgout_buf[0] == MSG_ABORT)
1745 		srb->state = SRB_ABORT_SENT;
1746 
1747 	DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
1748 }
1749 
1750 
command_phase0(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb,u16 * pscsi_status)1751 static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1752 		u16 *pscsi_status)
1753 {
1754 	dprintkdbg(DBG_0, "command_phase0: (0x%p)\n", srb->cmd);
1755 	DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
1756 }
1757 
1758 
command_phase1(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb,u16 * pscsi_status)1759 static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1760 		u16 *pscsi_status)
1761 {
1762 	struct DeviceCtlBlk *dcb;
1763 	u8 *ptr;
1764 	u16 i;
1765 	dprintkdbg(DBG_0, "command_phase1: (0x%p)\n", srb->cmd);
1766 
1767 	clear_fifo(acb, "command_phase1");
1768 	DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRATN);
1769 	if (!(srb->flag & AUTO_REQSENSE)) {
1770 		ptr = (u8 *)srb->cmd->cmnd;
1771 		for (i = 0; i < srb->cmd->cmd_len; i++) {
1772 			DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr);
1773 			ptr++;
1774 		}
1775 	} else {
1776 		DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE);
1777 		dcb = acb->active_dcb;
1778 		/* target id */
1779 		DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5));
1780 		DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1781 		DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1782 		DC395x_write8(acb, TRM_S1040_SCSI_FIFO, SCSI_SENSE_BUFFERSIZE);
1783 		DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1784 	}
1785 	srb->state |= SRB_COMMAND;
1786 	/* it's important for atn stop */
1787 	DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
1788 	/* SCSI command */
1789 	DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
1790 }
1791 
1792 
1793 /*
1794  * Verify that the remaining space in the hw sg lists is the same as
1795  * the count of remaining bytes in srb->total_xfer_length
1796  */
sg_verify_length(struct ScsiReqBlk * srb)1797 static void sg_verify_length(struct ScsiReqBlk *srb)
1798 {
1799 	if (debug_enabled(DBG_SG)) {
1800 		unsigned len = 0;
1801 		unsigned idx = srb->sg_index;
1802 		struct SGentry *psge = srb->segment_x + idx;
1803 		for (; idx < srb->sg_count; psge++, idx++)
1804 			len += psge->length;
1805 		if (len != srb->total_xfer_length)
1806 			dprintkdbg(DBG_SG,
1807 			       "Inconsistent SRB S/G lengths (Tot=%i, Count=%i) !!\n",
1808 			       srb->total_xfer_length, len);
1809 	}
1810 }
1811 
1812 
1813 /*
1814  * Compute the next Scatter Gather list index and adjust its length
1815  * and address if necessary
1816  */
sg_update_list(struct ScsiReqBlk * srb,u32 left)1817 static void sg_update_list(struct ScsiReqBlk *srb, u32 left)
1818 {
1819 	u8 idx;
1820 	u32 xferred = srb->total_xfer_length - left; /* bytes transferred */
1821 	struct SGentry *psge = srb->segment_x + srb->sg_index;
1822 
1823 	dprintkdbg(DBG_0,
1824 		"sg_update_list: Transferred %i of %i bytes, %i remain\n",
1825 		xferred, srb->total_xfer_length, left);
1826 	if (xferred == 0) {
1827 		/* nothing to update since we did not transfer any data */
1828 		return;
1829 	}
1830 
1831 	sg_verify_length(srb);
1832 	srb->total_xfer_length = left;	/* update remaining count */
1833 	for (idx = srb->sg_index; idx < srb->sg_count; idx++) {
1834 		if (xferred >= psge->length) {
1835 			/* Complete SG entries done */
1836 			xferred -= psge->length;
1837 		} else {
1838 			/* Partial SG entry done */
1839 			dma_sync_single_for_cpu(&srb->dcb->acb->dev->dev,
1840 					srb->sg_bus_addr, SEGMENTX_LEN,
1841 					DMA_TO_DEVICE);
1842 			psge->length -= xferred;
1843 			psge->address += xferred;
1844 			srb->sg_index = idx;
1845 			dma_sync_single_for_device(&srb->dcb->acb->dev->dev,
1846 					srb->sg_bus_addr, SEGMENTX_LEN,
1847 					DMA_TO_DEVICE);
1848 			break;
1849 		}
1850 		psge++;
1851 	}
1852 	sg_verify_length(srb);
1853 }
1854 
1855 
1856 /*
1857  * We have transferred a single byte (PIO mode?) and need to update
1858  * the count of bytes remaining (total_xfer_length) and update the sg
1859  * entry to either point to next byte in the current sg entry, or of
1860  * already at the end to point to the start of the next sg entry
1861  */
sg_subtract_one(struct ScsiReqBlk * srb)1862 static void sg_subtract_one(struct ScsiReqBlk *srb)
1863 {
1864 	sg_update_list(srb, srb->total_xfer_length - 1);
1865 }
1866 
1867 
1868 /*
1869  * cleanup_after_transfer
1870  *
1871  * Makes sure, DMA and SCSI engine are empty, after the transfer has finished
1872  * KG: Currently called from  StatusPhase1 ()
1873  * Should probably also be called from other places
1874  * Best might be to call it in DataXXPhase0, if new phase will differ
1875  */
cleanup_after_transfer(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb)1876 static void cleanup_after_transfer(struct AdapterCtlBlk *acb,
1877 		struct ScsiReqBlk *srb)
1878 {
1879 	/*DC395x_write8 (TRM_S1040_DMA_STATUS, FORCEDMACOMP); */
1880 	if (DC395x_read16(acb, TRM_S1040_DMA_COMMAND) & 0x0001) {	/* read */
1881 		if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40))
1882 			clear_fifo(acb, "cleanup/in");
1883 		if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80))
1884 			DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
1885 	} else {		/* write */
1886 		if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80))
1887 			DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
1888 		if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40))
1889 			clear_fifo(acb, "cleanup/out");
1890 	}
1891 	DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
1892 }
1893 
1894 
1895 /*
1896  * Those no of bytes will be transferred w/ PIO through the SCSI FIFO
1897  * Seems to be needed for unknown reasons; could be a hardware bug :-(
1898  */
1899 #define DC395x_LASTPIO 4
1900 
1901 
data_out_phase0(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb,u16 * pscsi_status)1902 static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1903 		u16 *pscsi_status)
1904 {
1905 	struct DeviceCtlBlk *dcb = srb->dcb;
1906 	u16 scsi_status = *pscsi_status;
1907 	u32 d_left_counter = 0;
1908 	dprintkdbg(DBG_0, "data_out_phase0: (0x%p) <%02i-%i>\n",
1909 		srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
1910 
1911 	/*
1912 	 * KG: We need to drain the buffers before we draw any conclusions!
1913 	 * This means telling the DMA to push the rest into SCSI, telling
1914 	 * SCSI to push the rest to the bus.
1915 	 * However, the device might have been the one to stop us (phase
1916 	 * change), and the data in transit just needs to be accounted so
1917 	 * it can be retransmitted.)
1918 	 */
1919 	/*
1920 	 * KG: Stop DMA engine pushing more data into the SCSI FIFO
1921 	 * If we need more data, the DMA SG list will be freshly set up, anyway
1922 	 */
1923 	dprintkdbg(DBG_PIO, "data_out_phase0: "
1924 		"DMA{fifocnt=0x%02x fifostat=0x%02x} "
1925 		"SCSI{fifocnt=0x%02x cnt=0x%06x status=0x%04x} total=0x%06x\n",
1926 		DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
1927 		DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
1928 		DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
1929 		DC395x_read32(acb, TRM_S1040_SCSI_COUNTER), scsi_status,
1930 		srb->total_xfer_length);
1931 	DC395x_write8(acb, TRM_S1040_DMA_CONTROL, STOPDMAXFER | CLRXFIFO);
1932 
1933 	if (!(srb->state & SRB_XFERPAD)) {
1934 		if (scsi_status & PARITYERROR)
1935 			srb->status |= PARITY_ERROR;
1936 
1937 		/*
1938 		 * KG: Right, we can't just rely on the SCSI_COUNTER, because this
1939 		 * is the no of bytes it got from the DMA engine not the no it
1940 		 * transferred successfully to the device. (And the difference could
1941 		 * be as much as the FIFO size, I guess ...)
1942 		 */
1943 		if (!(scsi_status & SCSIXFERDONE)) {
1944 			/*
1945 			 * when data transfer from DMA FIFO to SCSI FIFO
1946 			 * if there was some data left in SCSI FIFO
1947 			 */
1948 			d_left_counter =
1949 			    (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) &
1950 				  0x1F);
1951 			if (dcb->sync_period & WIDE_SYNC)
1952 				d_left_counter <<= 1;
1953 
1954 			dprintkdbg(DBG_KG, "data_out_phase0: FIFO contains %i %s\n"
1955 				"SCSI{fifocnt=0x%02x cnt=0x%08x} "
1956 				"DMA{fifocnt=0x%04x cnt=0x%02x ctr=0x%08x}\n",
1957 				DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
1958 				(dcb->sync_period & WIDE_SYNC) ? "words" : "bytes",
1959 				DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
1960 				DC395x_read32(acb, TRM_S1040_SCSI_COUNTER),
1961 				DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
1962 				DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
1963 				DC395x_read32(acb, TRM_S1040_DMA_CXCNT));
1964 		}
1965 		/*
1966 		 * calculate all the residue data that not yet tranfered
1967 		 * SCSI transfer counter + left in SCSI FIFO data
1968 		 *
1969 		 * .....TRM_S1040_SCSI_COUNTER (24bits)
1970 		 * The counter always decrement by one for every SCSI byte transfer.
1971 		 * .....TRM_S1040_SCSI_FIFOCNT ( 5bits)
1972 		 * The counter is SCSI FIFO offset counter (in units of bytes or! words)
1973 		 */
1974 		if (srb->total_xfer_length > DC395x_LASTPIO)
1975 			d_left_counter +=
1976 			    DC395x_read32(acb, TRM_S1040_SCSI_COUNTER);
1977 
1978 		/* Is this a good idea? */
1979 		/*clear_fifo(acb, "DOP1"); */
1980 		/* KG: What is this supposed to be useful for? WIDE padding stuff? */
1981 		if (d_left_counter == 1 && dcb->sync_period & WIDE_SYNC
1982 		    && scsi_bufflen(srb->cmd) % 2) {
1983 			d_left_counter = 0;
1984 			dprintkl(KERN_INFO,
1985 				"data_out_phase0: Discard 1 byte (0x%02x)\n",
1986 				scsi_status);
1987 		}
1988 		/*
1989 		 * KG: Oops again. Same thinko as above: The SCSI might have been
1990 		 * faster than the DMA engine, so that it ran out of data.
1991 		 * In that case, we have to do just nothing!
1992 		 * But: Why the interrupt: No phase change. No XFERCNT_2_ZERO. Or?
1993 		 */
1994 		/*
1995 		 * KG: This is nonsense: We have been WRITING data to the bus
1996 		 * If the SCSI engine has no bytes left, how should the DMA engine?
1997 		 */
1998 		if (d_left_counter == 0) {
1999 			srb->total_xfer_length = 0;
2000 		} else {
2001 			/*
2002 			 * if transfer not yet complete
2003 			 * there were some data residue in SCSI FIFO or
2004 			 * SCSI transfer counter not empty
2005 			 */
2006 			long oldxferred =
2007 			    srb->total_xfer_length - d_left_counter;
2008 			const int diff =
2009 			    (dcb->sync_period & WIDE_SYNC) ? 2 : 1;
2010 			sg_update_list(srb, d_left_counter);
2011 			/* KG: Most ugly hack! Apparently, this works around a chip bug */
2012 			if ((srb->segment_x[srb->sg_index].length ==
2013 			     diff && scsi_sg_count(srb->cmd))
2014 			    || ((oldxferred & ~PAGE_MASK) ==
2015 				(PAGE_SIZE - diff))
2016 			    ) {
2017 				dprintkl(KERN_INFO, "data_out_phase0: "
2018 					"Work around chip bug (%i)?\n", diff);
2019 				d_left_counter =
2020 				    srb->total_xfer_length - diff;
2021 				sg_update_list(srb, d_left_counter);
2022 				/*srb->total_xfer_length -= diff; */
2023 				/*srb->virt_addr += diff; */
2024 				/*if (srb->cmd->use_sg) */
2025 				/*      srb->sg_index++; */
2026 			}
2027 		}
2028 	}
2029 	if ((*pscsi_status & PHASEMASK) != PH_DATA_OUT) {
2030 		cleanup_after_transfer(acb, srb);
2031 	}
2032 }
2033 
2034 
data_out_phase1(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb,u16 * pscsi_status)2035 static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2036 		u16 *pscsi_status)
2037 {
2038 	dprintkdbg(DBG_0, "data_out_phase1: (0x%p) <%02i-%i>\n",
2039 		srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
2040 	clear_fifo(acb, "data_out_phase1");
2041 	/* do prepare before transfer when data out phase */
2042 	data_io_transfer(acb, srb, XFERDATAOUT);
2043 }
2044 
data_in_phase0(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb,u16 * pscsi_status)2045 static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2046 		u16 *pscsi_status)
2047 {
2048 	u16 scsi_status = *pscsi_status;
2049 
2050 	dprintkdbg(DBG_0, "data_in_phase0: (0x%p) <%02i-%i>\n",
2051 		srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
2052 
2053 	/*
2054 	 * KG: DataIn is much more tricky than DataOut. When the device is finished
2055 	 * and switches to another phase, the SCSI engine should be finished too.
2056 	 * But: There might still be bytes left in its FIFO to be fetched by the DMA
2057 	 * engine and transferred to memory.
2058 	 * We should wait for the FIFOs to be emptied by that (is there any way to
2059 	 * enforce this?) and then stop the DMA engine, because it might think, that
2060 	 * there are more bytes to follow. Yes, the device might disconnect prior to
2061 	 * having all bytes transferred!
2062 	 * Also we should make sure that all data from the DMA engine buffer's really
2063 	 * made its way to the system memory! Some documentation on this would not
2064 	 * seem to be a bad idea, actually.
2065 	 */
2066 	if (!(srb->state & SRB_XFERPAD)) {
2067 		u32 d_left_counter;
2068 		unsigned int sc, fc;
2069 
2070 		if (scsi_status & PARITYERROR) {
2071 			dprintkl(KERN_INFO, "data_in_phase0: (0x%p) "
2072 				"Parity Error\n", srb->cmd);
2073 			srb->status |= PARITY_ERROR;
2074 		}
2075 		/*
2076 		 * KG: We should wait for the DMA FIFO to be empty ...
2077 		 * but: it would be better to wait first for the SCSI FIFO and then the
2078 		 * the DMA FIFO to become empty? How do we know, that the device not already
2079 		 * sent data to the FIFO in a MsgIn phase, eg.?
2080 		 */
2081 		if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80)) {
2082 #if 0
2083 			int ctr = 6000000;
2084 			dprintkl(KERN_DEBUG,
2085 				"DIP0: Wait for DMA FIFO to flush ...\n");
2086 			/*DC395x_write8  (TRM_S1040_DMA_CONTROL, STOPDMAXFER); */
2087 			/*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 7); */
2088 			/*DC395x_write8  (TRM_S1040_SCSI_COMMAND, SCMD_DMA_IN); */
2089 			while (!
2090 			       (DC395x_read16(acb, TRM_S1040_DMA_FIFOSTAT) &
2091 				0x80) && --ctr);
2092 			if (ctr < 6000000 - 1)
2093 				dprintkl(KERN_DEBUG
2094 				       "DIP0: Had to wait for DMA ...\n");
2095 			if (!ctr)
2096 				dprintkl(KERN_ERR,
2097 				       "Deadlock in DIP0 waiting for DMA FIFO empty!!\n");
2098 			/*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 0); */
2099 #endif
2100 			dprintkdbg(DBG_KG, "data_in_phase0: "
2101 				"DMA{fifocnt=0x%02x fifostat=0x%02x}\n",
2102 				DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
2103 				DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT));
2104 		}
2105 		/* Now: Check remainig data: The SCSI counters should tell us ... */
2106 		sc = DC395x_read32(acb, TRM_S1040_SCSI_COUNTER);
2107 		fc = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
2108 		d_left_counter = sc + ((fc & 0x1f)
2109 		       << ((srb->dcb->sync_period & WIDE_SYNC) ? 1 :
2110 			   0));
2111 		dprintkdbg(DBG_KG, "data_in_phase0: "
2112 			"SCSI{fifocnt=0x%02x%s ctr=0x%08x} "
2113 			"DMA{fifocnt=0x%02x fifostat=0x%02x ctr=0x%08x} "
2114 			"Remain{totxfer=%i scsi_fifo+ctr=%i}\n",
2115 			fc,
2116 			(srb->dcb->sync_period & WIDE_SYNC) ? "words" : "bytes",
2117 			sc,
2118 			fc,
2119 			DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
2120 			DC395x_read32(acb, TRM_S1040_DMA_CXCNT),
2121 			srb->total_xfer_length, d_left_counter);
2122 #if DC395x_LASTPIO
2123 		/* KG: Less than or equal to 4 bytes can not be transferred via DMA, it seems. */
2124 		if (d_left_counter
2125 		    && srb->total_xfer_length <= DC395x_LASTPIO) {
2126 			size_t left_io = srb->total_xfer_length;
2127 
2128 			/*u32 addr = (srb->segment_x[srb->sg_index].address); */
2129 			/*sg_update_list (srb, d_left_counter); */
2130 			dprintkdbg(DBG_PIO, "data_in_phase0: PIO (%i %s) "
2131 				   "for remaining %i bytes:",
2132 				fc & 0x1f,
2133 				(srb->dcb->sync_period & WIDE_SYNC) ?
2134 				    "words" : "bytes",
2135 				srb->total_xfer_length);
2136 			if (srb->dcb->sync_period & WIDE_SYNC)
2137 				DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2138 					      CFG2_WIDEFIFO);
2139 			while (left_io) {
2140 				unsigned char *virt, *base = NULL;
2141 				unsigned long flags = 0;
2142 				size_t len = left_io;
2143 				size_t offset = srb->request_length - left_io;
2144 
2145 				local_irq_save(flags);
2146 				/* Assumption: it's inside one page as it's at most 4 bytes and
2147 				   I just assume it's on a 4-byte boundary */
2148 				base = scsi_kmap_atomic_sg(scsi_sglist(srb->cmd),
2149 							   srb->sg_count, &offset, &len);
2150 				virt = base + offset;
2151 
2152 				left_io -= len;
2153 
2154 				while (len) {
2155 					u8 byte;
2156 					byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2157 					*virt++ = byte;
2158 
2159 					if (debug_enabled(DBG_PIO))
2160 						printk(" %02x", byte);
2161 
2162 					d_left_counter--;
2163 					sg_subtract_one(srb);
2164 
2165 					len--;
2166 
2167 					fc = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
2168 
2169 					if (fc == 0x40) {
2170 						left_io = 0;
2171 						break;
2172 					}
2173 				}
2174 
2175 				WARN_ON((fc != 0x40) == !d_left_counter);
2176 
2177 				if (fc == 0x40 && (srb->dcb->sync_period & WIDE_SYNC)) {
2178 					/* Read the last byte ... */
2179 					if (srb->total_xfer_length > 0) {
2180 						u8 byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2181 
2182 						*virt++ = byte;
2183 						srb->total_xfer_length--;
2184 						if (debug_enabled(DBG_PIO))
2185 							printk(" %02x", byte);
2186 					}
2187 
2188 					DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2189 				}
2190 
2191 				scsi_kunmap_atomic_sg(base);
2192 				local_irq_restore(flags);
2193 			}
2194 			/*printk(" %08x", *(u32*)(bus_to_virt (addr))); */
2195 			/*srb->total_xfer_length = 0; */
2196 			if (debug_enabled(DBG_PIO))
2197 				printk("\n");
2198 		}
2199 #endif				/* DC395x_LASTPIO */
2200 
2201 #if 0
2202 		/*
2203 		 * KG: This was in DATAOUT. Does it also belong here?
2204 		 * Nobody seems to know what counter and fifo_cnt count exactly ...
2205 		 */
2206 		if (!(scsi_status & SCSIXFERDONE)) {
2207 			/*
2208 			 * when data transfer from DMA FIFO to SCSI FIFO
2209 			 * if there was some data left in SCSI FIFO
2210 			 */
2211 			d_left_counter =
2212 			    (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) &
2213 				  0x1F);
2214 			if (srb->dcb->sync_period & WIDE_SYNC)
2215 				d_left_counter <<= 1;
2216 			/*
2217 			 * if WIDE scsi SCSI FIFOCNT unit is word !!!
2218 			 * so need to *= 2
2219 			 * KG: Seems to be correct ...
2220 			 */
2221 		}
2222 #endif
2223 		/* KG: This should not be needed any more! */
2224 		if (d_left_counter == 0
2225 		    || (scsi_status & SCSIXFERCNT_2_ZERO)) {
2226 #if 0
2227 			int ctr = 6000000;
2228 			u8 TempDMAstatus;
2229 			do {
2230 				TempDMAstatus =
2231 				    DC395x_read8(acb, TRM_S1040_DMA_STATUS);
2232 			} while (!(TempDMAstatus & DMAXFERCOMP) && --ctr);
2233 			if (!ctr)
2234 				dprintkl(KERN_ERR,
2235 				       "Deadlock in DataInPhase0 waiting for DMA!!\n");
2236 			srb->total_xfer_length = 0;
2237 #endif
2238 			srb->total_xfer_length = d_left_counter;
2239 		} else {	/* phase changed */
2240 			/*
2241 			 * parsing the case:
2242 			 * when a transfer not yet complete
2243 			 * but be disconnected by target
2244 			 * if transfer not yet complete
2245 			 * there were some data residue in SCSI FIFO or
2246 			 * SCSI transfer counter not empty
2247 			 */
2248 			sg_update_list(srb, d_left_counter);
2249 		}
2250 	}
2251 	/* KG: The target may decide to disconnect: Empty FIFO before! */
2252 	if ((*pscsi_status & PHASEMASK) != PH_DATA_IN) {
2253 		cleanup_after_transfer(acb, srb);
2254 	}
2255 }
2256 
2257 
data_in_phase1(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb,u16 * pscsi_status)2258 static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2259 		u16 *pscsi_status)
2260 {
2261 	dprintkdbg(DBG_0, "data_in_phase1: (0x%p) <%02i-%i>\n",
2262 		srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
2263 	data_io_transfer(acb, srb, XFERDATAIN);
2264 }
2265 
2266 
data_io_transfer(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb,u16 io_dir)2267 static void data_io_transfer(struct AdapterCtlBlk *acb,
2268 		struct ScsiReqBlk *srb, u16 io_dir)
2269 {
2270 	struct DeviceCtlBlk *dcb = srb->dcb;
2271 	u8 bval;
2272 	dprintkdbg(DBG_0,
2273 		"data_io_transfer: (0x%p) <%02i-%i> %c len=%i, sg=(%i/%i)\n",
2274 		srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun,
2275 		((io_dir & DMACMD_DIR) ? 'r' : 'w'),
2276 		srb->total_xfer_length, srb->sg_index, srb->sg_count);
2277 	if (srb == acb->tmp_srb)
2278 		dprintkl(KERN_ERR, "data_io_transfer: Using tmp_srb!\n");
2279 	if (srb->sg_index >= srb->sg_count) {
2280 		/* can't happen? out of bounds error */
2281 		return;
2282 	}
2283 
2284 	if (srb->total_xfer_length > DC395x_LASTPIO) {
2285 		u8 dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS);
2286 		/*
2287 		 * KG: What should we do: Use SCSI Cmd 0x90/0x92?
2288 		 * Maybe, even ABORTXFER would be appropriate
2289 		 */
2290 		if (dma_status & XFERPENDING) {
2291 			dprintkl(KERN_DEBUG, "data_io_transfer: Xfer pending! "
2292 				"Expect trouble!\n");
2293 			dump_register_info(acb, dcb, srb);
2294 			DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
2295 		}
2296 		/* clear_fifo(acb, "IO"); */
2297 		/*
2298 		 * load what physical address of Scatter/Gather list table
2299 		 * want to be transfer
2300 		 */
2301 		srb->state |= SRB_DATA_XFER;
2302 		DC395x_write32(acb, TRM_S1040_DMA_XHIGHADDR, 0);
2303 		if (scsi_sg_count(srb->cmd)) {	/* with S/G */
2304 			io_dir |= DMACMD_SG;
2305 			DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR,
2306 				       srb->sg_bus_addr +
2307 				       sizeof(struct SGentry) *
2308 				       srb->sg_index);
2309 			/* load how many bytes in the sg list table */
2310 			DC395x_write32(acb, TRM_S1040_DMA_XCNT,
2311 				       ((u32)(srb->sg_count -
2312 					      srb->sg_index) << 3));
2313 		} else {	/* without S/G */
2314 			io_dir &= ~DMACMD_SG;
2315 			DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR,
2316 				       srb->segment_x[0].address);
2317 			DC395x_write32(acb, TRM_S1040_DMA_XCNT,
2318 				       srb->segment_x[0].length);
2319 		}
2320 		/* load total transfer length (24bits) max value 16Mbyte */
2321 		DC395x_write32(acb, TRM_S1040_SCSI_COUNTER,
2322 			       srb->total_xfer_length);
2323 		DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);	/* it's important for atn stop */
2324 		if (io_dir & DMACMD_DIR) {	/* read */
2325 			DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2326 				      SCMD_DMA_IN);
2327 			DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir);
2328 		} else {
2329 			DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir);
2330 			DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2331 				      SCMD_DMA_OUT);
2332 		}
2333 
2334 	}
2335 #if DC395x_LASTPIO
2336 	else if (srb->total_xfer_length > 0) {	/* The last four bytes: Do PIO */
2337 		/*
2338 		 * load what physical address of Scatter/Gather list table
2339 		 * want to be transfer
2340 		 */
2341 		srb->state |= SRB_DATA_XFER;
2342 		/* load total transfer length (24bits) max value 16Mbyte */
2343 		DC395x_write32(acb, TRM_S1040_SCSI_COUNTER,
2344 			       srb->total_xfer_length);
2345 		DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);	/* it's important for atn stop */
2346 		if (io_dir & DMACMD_DIR) {	/* read */
2347 			DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2348 				      SCMD_FIFO_IN);
2349 		} else {	/* write */
2350 			int ln = srb->total_xfer_length;
2351 			size_t left_io = srb->total_xfer_length;
2352 
2353 			if (srb->dcb->sync_period & WIDE_SYNC)
2354 				DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2355 				     CFG2_WIDEFIFO);
2356 
2357 			while (left_io) {
2358 				unsigned char *virt, *base = NULL;
2359 				unsigned long flags = 0;
2360 				size_t len = left_io;
2361 				size_t offset = srb->request_length - left_io;
2362 
2363 				local_irq_save(flags);
2364 				/* Again, max 4 bytes */
2365 				base = scsi_kmap_atomic_sg(scsi_sglist(srb->cmd),
2366 							   srb->sg_count, &offset, &len);
2367 				virt = base + offset;
2368 
2369 				left_io -= len;
2370 
2371 				while (len--) {
2372 					if (debug_enabled(DBG_PIO))
2373 						printk(" %02x", *virt);
2374 
2375 					DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *virt++);
2376 
2377 					sg_subtract_one(srb);
2378 				}
2379 
2380 				scsi_kunmap_atomic_sg(base);
2381 				local_irq_restore(flags);
2382 			}
2383 			if (srb->dcb->sync_period & WIDE_SYNC) {
2384 				if (ln % 2) {
2385 					DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
2386 					if (debug_enabled(DBG_PIO))
2387 						printk(" |00");
2388 				}
2389 				DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2390 			}
2391 			/*DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, ln); */
2392 			if (debug_enabled(DBG_PIO))
2393 				printk("\n");
2394 			DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2395 					  SCMD_FIFO_OUT);
2396 		}
2397 	}
2398 #endif				/* DC395x_LASTPIO */
2399 	else {		/* xfer pad */
2400 		u8 data = 0, data2 = 0;
2401 		if (srb->sg_count) {
2402 			srb->adapter_status = H_OVER_UNDER_RUN;
2403 			srb->status |= OVER_RUN;
2404 		}
2405 		/*
2406 		 * KG: despite the fact that we are using 16 bits I/O ops
2407 		 * the SCSI FIFO is only 8 bits according to the docs
2408 		 * (we can set bit 1 in 0x8f to serialize FIFO access ...)
2409 		 */
2410 		if (dcb->sync_period & WIDE_SYNC) {
2411 			DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 2);
2412 			DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2413 				      CFG2_WIDEFIFO);
2414 			if (io_dir & DMACMD_DIR) {
2415 				data = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2416 				data2 = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2417 			} else {
2418 				/* Danger, Robinson: If you find KGs
2419 				 * scattered over the wide disk, the driver
2420 				 * or chip is to blame :-( */
2421 				DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K');
2422 				DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'G');
2423 			}
2424 			DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2425 		} else {
2426 			DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1);
2427 			/* Danger, Robinson: If you find a collection of Ks on your disk
2428 			 * something broke :-( */
2429 			if (io_dir & DMACMD_DIR)
2430 				data = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2431 			else
2432 				DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K');
2433 		}
2434 		srb->state |= SRB_XFERPAD;
2435 		DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);	/* it's important for atn stop */
2436 		/* SCSI command */
2437 		bval = (io_dir & DMACMD_DIR) ? SCMD_FIFO_IN : SCMD_FIFO_OUT;
2438 		DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, bval);
2439 	}
2440 }
2441 
2442 
status_phase0(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb,u16 * pscsi_status)2443 static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2444 		u16 *pscsi_status)
2445 {
2446 	dprintkdbg(DBG_0, "status_phase0: (0x%p) <%02i-%i>\n",
2447 		srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
2448 	srb->target_status = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2449 	srb->end_message = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);	/* get message */
2450 	srb->state = SRB_COMPLETED;
2451 	*pscsi_status = PH_BUS_FREE;	/*.. initial phase */
2452 	DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);	/* it's important for atn stop */
2453 	DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
2454 }
2455 
2456 
status_phase1(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb,u16 * pscsi_status)2457 static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2458 		u16 *pscsi_status)
2459 {
2460 	dprintkdbg(DBG_0, "status_phase1: (0x%p) <%02i-%i>\n",
2461 		srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
2462 	srb->state = SRB_STATUS;
2463 	DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);	/* it's important for atn stop */
2464 	DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_COMP);
2465 }
2466 
2467 
2468 /* Check if the message is complete */
msgin_completed(u8 * msgbuf,u32 len)2469 static inline u8 msgin_completed(u8 * msgbuf, u32 len)
2470 {
2471 	if (*msgbuf == EXTENDED_MESSAGE) {
2472 		if (len < 2)
2473 			return 0;
2474 		if (len < msgbuf[1] + 2)
2475 			return 0;
2476 	} else if (*msgbuf >= 0x20 && *msgbuf <= 0x2f)	/* two byte messages */
2477 		if (len < 2)
2478 			return 0;
2479 	return 1;
2480 }
2481 
2482 /* reject_msg */
msgin_reject(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb)2483 static inline void msgin_reject(struct AdapterCtlBlk *acb,
2484 		struct ScsiReqBlk *srb)
2485 {
2486 	srb->msgout_buf[0] = MESSAGE_REJECT;
2487 	srb->msg_count = 1;
2488 	DC395x_ENABLE_MSGOUT;
2489 	srb->state &= ~SRB_MSGIN;
2490 	srb->state |= SRB_MSGOUT;
2491 	dprintkl(KERN_INFO, "msgin_reject: 0x%02x <%02i-%i>\n",
2492 		srb->msgin_buf[0],
2493 		srb->dcb->target_id, srb->dcb->target_lun);
2494 }
2495 
2496 
msgin_qtag(struct AdapterCtlBlk * acb,struct DeviceCtlBlk * dcb,u8 tag)2497 static struct ScsiReqBlk *msgin_qtag(struct AdapterCtlBlk *acb,
2498 		struct DeviceCtlBlk *dcb, u8 tag)
2499 {
2500 	struct ScsiReqBlk *srb = NULL;
2501 	struct ScsiReqBlk *i;
2502 	dprintkdbg(DBG_0, "msgin_qtag: (0x%p) tag=%i srb=%p\n",
2503 		   srb->cmd, tag, srb);
2504 
2505 	if (!(dcb->tag_mask & (1 << tag)))
2506 		dprintkl(KERN_DEBUG,
2507 			"msgin_qtag: tag_mask=0x%08x does not reserve tag %i!\n",
2508 			dcb->tag_mask, tag);
2509 
2510 	if (list_empty(&dcb->srb_going_list))
2511 		goto mingx0;
2512 	list_for_each_entry(i, &dcb->srb_going_list, list) {
2513 		if (i->tag_number == tag) {
2514 			srb = i;
2515 			break;
2516 		}
2517 	}
2518 	if (!srb)
2519 		goto mingx0;
2520 
2521 	dprintkdbg(DBG_0, "msgin_qtag: (0x%p) <%02i-%i>\n",
2522 		srb->cmd, srb->dcb->target_id, srb->dcb->target_lun);
2523 	if (dcb->flag & ABORT_DEV_) {
2524 		/*srb->state = SRB_ABORT_SENT; */
2525 		enable_msgout_abort(acb, srb);
2526 	}
2527 
2528 	if (!(srb->state & SRB_DISCONNECT))
2529 		goto mingx0;
2530 
2531 	memcpy(srb->msgin_buf, dcb->active_srb->msgin_buf, acb->msg_len);
2532 	srb->state |= dcb->active_srb->state;
2533 	srb->state |= SRB_DATA_XFER;
2534 	dcb->active_srb = srb;
2535 	/* How can we make the DORS happy? */
2536 	return srb;
2537 
2538       mingx0:
2539 	srb = acb->tmp_srb;
2540 	srb->state = SRB_UNEXPECT_RESEL;
2541 	dcb->active_srb = srb;
2542 	srb->msgout_buf[0] = MSG_ABORT_TAG;
2543 	srb->msg_count = 1;
2544 	DC395x_ENABLE_MSGOUT;
2545 	dprintkl(KERN_DEBUG, "msgin_qtag: Unknown tag %i - abort\n", tag);
2546 	return srb;
2547 }
2548 
2549 
reprogram_regs(struct AdapterCtlBlk * acb,struct DeviceCtlBlk * dcb)2550 static inline void reprogram_regs(struct AdapterCtlBlk *acb,
2551 		struct DeviceCtlBlk *dcb)
2552 {
2553 	DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id);
2554 	DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period);
2555 	DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset);
2556 	set_xfer_rate(acb, dcb);
2557 }
2558 
2559 
2560 /* set async transfer mode */
msgin_set_async(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb)2561 static void msgin_set_async(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2562 {
2563 	struct DeviceCtlBlk *dcb = srb->dcb;
2564 	dprintkl(KERN_DEBUG, "msgin_set_async: No sync transfers <%02i-%i>\n",
2565 		dcb->target_id, dcb->target_lun);
2566 
2567 	dcb->sync_mode &= ~(SYNC_NEGO_ENABLE);
2568 	dcb->sync_mode |= SYNC_NEGO_DONE;
2569 	/*dcb->sync_period &= 0; */
2570 	dcb->sync_offset = 0;
2571 	dcb->min_nego_period = 200 >> 2;	/* 200ns <=> 5 MHz */
2572 	srb->state &= ~SRB_DO_SYNC_NEGO;
2573 	reprogram_regs(acb, dcb);
2574 	if ((dcb->sync_mode & WIDE_NEGO_ENABLE)
2575 	    && !(dcb->sync_mode & WIDE_NEGO_DONE)) {
2576 		build_wdtr(acb, dcb, srb);
2577 		DC395x_ENABLE_MSGOUT;
2578 		dprintkdbg(DBG_0, "msgin_set_async(rej): Try WDTR anyway\n");
2579 	}
2580 }
2581 
2582 
2583 /* set sync transfer mode */
msgin_set_sync(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb)2584 static void msgin_set_sync(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2585 {
2586 	struct DeviceCtlBlk *dcb = srb->dcb;
2587 	u8 bval;
2588 	int fact;
2589 	dprintkdbg(DBG_1, "msgin_set_sync: <%02i> Sync: %ins "
2590 		"(%02i.%01i MHz) Offset %i\n",
2591 		dcb->target_id, srb->msgin_buf[3] << 2,
2592 		(250 / srb->msgin_buf[3]),
2593 		((250 % srb->msgin_buf[3]) * 10) / srb->msgin_buf[3],
2594 		srb->msgin_buf[4]);
2595 
2596 	if (srb->msgin_buf[4] > 15)
2597 		srb->msgin_buf[4] = 15;
2598 	if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO))
2599 		dcb->sync_offset = 0;
2600 	else if (dcb->sync_offset == 0)
2601 		dcb->sync_offset = srb->msgin_buf[4];
2602 	if (srb->msgin_buf[4] > dcb->sync_offset)
2603 		srb->msgin_buf[4] = dcb->sync_offset;
2604 	else
2605 		dcb->sync_offset = srb->msgin_buf[4];
2606 	bval = 0;
2607 	while (bval < 7 && (srb->msgin_buf[3] > clock_period[bval]
2608 			    || dcb->min_nego_period >
2609 			    clock_period[bval]))
2610 		bval++;
2611 	if (srb->msgin_buf[3] < clock_period[bval])
2612 		dprintkl(KERN_INFO,
2613 			"msgin_set_sync: Increase sync nego period to %ins\n",
2614 			clock_period[bval] << 2);
2615 	srb->msgin_buf[3] = clock_period[bval];
2616 	dcb->sync_period &= 0xf0;
2617 	dcb->sync_period |= ALT_SYNC | bval;
2618 	dcb->min_nego_period = srb->msgin_buf[3];
2619 
2620 	if (dcb->sync_period & WIDE_SYNC)
2621 		fact = 500;
2622 	else
2623 		fact = 250;
2624 
2625 	dprintkl(KERN_INFO,
2626 		"Target %02i: %s Sync: %ins Offset %i (%02i.%01i MB/s)\n",
2627 		dcb->target_id, (fact == 500) ? "Wide16" : "",
2628 		dcb->min_nego_period << 2, dcb->sync_offset,
2629 		(fact / dcb->min_nego_period),
2630 		((fact % dcb->min_nego_period) * 10 +
2631 		dcb->min_nego_period / 2) / dcb->min_nego_period);
2632 
2633 	if (!(srb->state & SRB_DO_SYNC_NEGO)) {
2634 		/* Reply with corrected SDTR Message */
2635 		dprintkl(KERN_DEBUG, "msgin_set_sync: answer w/%ins %i\n",
2636 			srb->msgin_buf[3] << 2, srb->msgin_buf[4]);
2637 
2638 		memcpy(srb->msgout_buf, srb->msgin_buf, 5);
2639 		srb->msg_count = 5;
2640 		DC395x_ENABLE_MSGOUT;
2641 		dcb->sync_mode |= SYNC_NEGO_DONE;
2642 	} else {
2643 		if ((dcb->sync_mode & WIDE_NEGO_ENABLE)
2644 		    && !(dcb->sync_mode & WIDE_NEGO_DONE)) {
2645 			build_wdtr(acb, dcb, srb);
2646 			DC395x_ENABLE_MSGOUT;
2647 			dprintkdbg(DBG_0, "msgin_set_sync: Also try WDTR\n");
2648 		}
2649 	}
2650 	srb->state &= ~SRB_DO_SYNC_NEGO;
2651 	dcb->sync_mode |= SYNC_NEGO_DONE | SYNC_NEGO_ENABLE;
2652 
2653 	reprogram_regs(acb, dcb);
2654 }
2655 
2656 
msgin_set_nowide(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb)2657 static inline void msgin_set_nowide(struct AdapterCtlBlk *acb,
2658 		struct ScsiReqBlk *srb)
2659 {
2660 	struct DeviceCtlBlk *dcb = srb->dcb;
2661 	dprintkdbg(DBG_1, "msgin_set_nowide: <%02i>\n", dcb->target_id);
2662 
2663 	dcb->sync_period &= ~WIDE_SYNC;
2664 	dcb->sync_mode &= ~(WIDE_NEGO_ENABLE);
2665 	dcb->sync_mode |= WIDE_NEGO_DONE;
2666 	srb->state &= ~SRB_DO_WIDE_NEGO;
2667 	reprogram_regs(acb, dcb);
2668 	if ((dcb->sync_mode & SYNC_NEGO_ENABLE)
2669 	    && !(dcb->sync_mode & SYNC_NEGO_DONE)) {
2670 		build_sdtr(acb, dcb, srb);
2671 		DC395x_ENABLE_MSGOUT;
2672 		dprintkdbg(DBG_0, "msgin_set_nowide: Rejected. Try SDTR anyway\n");
2673 	}
2674 }
2675 
msgin_set_wide(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb)2676 static void msgin_set_wide(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2677 {
2678 	struct DeviceCtlBlk *dcb = srb->dcb;
2679 	u8 wide = (dcb->dev_mode & NTC_DO_WIDE_NEGO
2680 		   && acb->config & HCC_WIDE_CARD) ? 1 : 0;
2681 	dprintkdbg(DBG_1, "msgin_set_wide: <%02i>\n", dcb->target_id);
2682 
2683 	if (srb->msgin_buf[3] > wide)
2684 		srb->msgin_buf[3] = wide;
2685 	/* Completed */
2686 	if (!(srb->state & SRB_DO_WIDE_NEGO)) {
2687 		dprintkl(KERN_DEBUG,
2688 			"msgin_set_wide: Wide nego initiated <%02i>\n",
2689 			dcb->target_id);
2690 		memcpy(srb->msgout_buf, srb->msgin_buf, 4);
2691 		srb->msg_count = 4;
2692 		srb->state |= SRB_DO_WIDE_NEGO;
2693 		DC395x_ENABLE_MSGOUT;
2694 	}
2695 
2696 	dcb->sync_mode |= (WIDE_NEGO_ENABLE | WIDE_NEGO_DONE);
2697 	if (srb->msgin_buf[3] > 0)
2698 		dcb->sync_period |= WIDE_SYNC;
2699 	else
2700 		dcb->sync_period &= ~WIDE_SYNC;
2701 	srb->state &= ~SRB_DO_WIDE_NEGO;
2702 	/*dcb->sync_mode &= ~(WIDE_NEGO_ENABLE+WIDE_NEGO_DONE); */
2703 	dprintkdbg(DBG_1,
2704 		"msgin_set_wide: Wide (%i bit) negotiated <%02i>\n",
2705 		(8 << srb->msgin_buf[3]), dcb->target_id);
2706 	reprogram_regs(acb, dcb);
2707 	if ((dcb->sync_mode & SYNC_NEGO_ENABLE)
2708 	    && !(dcb->sync_mode & SYNC_NEGO_DONE)) {
2709 		build_sdtr(acb, dcb, srb);
2710 		DC395x_ENABLE_MSGOUT;
2711 		dprintkdbg(DBG_0, "msgin_set_wide: Also try SDTR.\n");
2712 	}
2713 }
2714 
2715 
2716 /*
2717  * extended message codes:
2718  *
2719  *	code	description
2720  *
2721  *	02h	Reserved
2722  *	00h	MODIFY DATA  POINTER
2723  *	01h	SYNCHRONOUS DATA TRANSFER REQUEST
2724  *	03h	WIDE DATA TRANSFER REQUEST
2725  *   04h - 7Fh	Reserved
2726  *   80h - FFh	Vendor specific
2727  */
msgin_phase0(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb,u16 * pscsi_status)2728 static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2729 		u16 *pscsi_status)
2730 {
2731 	struct DeviceCtlBlk *dcb = acb->active_dcb;
2732 	dprintkdbg(DBG_0, "msgin_phase0: (0x%p)\n", srb->cmd);
2733 
2734 	srb->msgin_buf[acb->msg_len++] = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2735 	if (msgin_completed(srb->msgin_buf, acb->msg_len)) {
2736 		/* Now eval the msg */
2737 		switch (srb->msgin_buf[0]) {
2738 		case DISCONNECT:
2739 			srb->state = SRB_DISCONNECT;
2740 			break;
2741 
2742 		case SIMPLE_QUEUE_TAG:
2743 		case HEAD_OF_QUEUE_TAG:
2744 		case ORDERED_QUEUE_TAG:
2745 			srb =
2746 			    msgin_qtag(acb, dcb,
2747 					      srb->msgin_buf[1]);
2748 			break;
2749 
2750 		case MESSAGE_REJECT:
2751 			DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
2752 				       DO_CLRATN | DO_DATALATCH);
2753 			/* A sync nego message was rejected ! */
2754 			if (srb->state & SRB_DO_SYNC_NEGO) {
2755 				msgin_set_async(acb, srb);
2756 				break;
2757 			}
2758 			/* A wide nego message was rejected ! */
2759 			if (srb->state & SRB_DO_WIDE_NEGO) {
2760 				msgin_set_nowide(acb, srb);
2761 				break;
2762 			}
2763 			enable_msgout_abort(acb, srb);
2764 			/*srb->state |= SRB_ABORT_SENT */
2765 			break;
2766 
2767 		case EXTENDED_MESSAGE:
2768 			/* SDTR */
2769 			if (srb->msgin_buf[1] == 3
2770 			    && srb->msgin_buf[2] == EXTENDED_SDTR) {
2771 				msgin_set_sync(acb, srb);
2772 				break;
2773 			}
2774 			/* WDTR */
2775 			if (srb->msgin_buf[1] == 2
2776 			    && srb->msgin_buf[2] == EXTENDED_WDTR
2777 			    && srb->msgin_buf[3] <= 2) { /* sanity check ... */
2778 				msgin_set_wide(acb, srb);
2779 				break;
2780 			}
2781 			msgin_reject(acb, srb);
2782 			break;
2783 
2784 		case MSG_IGNOREWIDE:
2785 			/* Discard  wide residual */
2786 			dprintkdbg(DBG_0, "msgin_phase0: Ignore Wide Residual!\n");
2787 			break;
2788 
2789 		case COMMAND_COMPLETE:
2790 			/* nothing has to be done */
2791 			break;
2792 
2793 		case SAVE_POINTERS:
2794 			/*
2795 			 * SAVE POINTER may be ignored as we have the struct
2796 			 * ScsiReqBlk* associated with the scsi command.
2797 			 */
2798 			dprintkdbg(DBG_0, "msgin_phase0: (0x%p) "
2799 				"SAVE POINTER rem=%i Ignore\n",
2800 				srb->cmd, srb->total_xfer_length);
2801 			break;
2802 
2803 		case RESTORE_POINTERS:
2804 			dprintkdbg(DBG_0, "msgin_phase0: RESTORE POINTER. Ignore\n");
2805 			break;
2806 
2807 		case ABORT:
2808 			dprintkdbg(DBG_0, "msgin_phase0: (0x%p) "
2809 				"<%02i-%i> ABORT msg\n",
2810 				srb->cmd, dcb->target_id,
2811 				dcb->target_lun);
2812 			dcb->flag |= ABORT_DEV_;
2813 			enable_msgout_abort(acb, srb);
2814 			break;
2815 
2816 		default:
2817 			/* reject unknown messages */
2818 			if (srb->msgin_buf[0] & IDENTIFY_BASE) {
2819 				dprintkdbg(DBG_0, "msgin_phase0: Identify msg\n");
2820 				srb->msg_count = 1;
2821 				srb->msgout_buf[0] = dcb->identify_msg;
2822 				DC395x_ENABLE_MSGOUT;
2823 				srb->state |= SRB_MSGOUT;
2824 				/*break; */
2825 			}
2826 			msgin_reject(acb, srb);
2827 		}
2828 
2829 		/* Clear counter and MsgIn state */
2830 		srb->state &= ~SRB_MSGIN;
2831 		acb->msg_len = 0;
2832 	}
2833 	*pscsi_status = PH_BUS_FREE;
2834 	DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);	/* it's important ... you know! */
2835 	DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
2836 }
2837 
2838 
msgin_phase1(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb,u16 * pscsi_status)2839 static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2840 		u16 *pscsi_status)
2841 {
2842 	dprintkdbg(DBG_0, "msgin_phase1: (0x%p)\n", srb->cmd);
2843 	clear_fifo(acb, "msgin_phase1");
2844 	DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1);
2845 	if (!(srb->state & SRB_MSGIN)) {
2846 		srb->state &= ~SRB_DISCONNECT;
2847 		srb->state |= SRB_MSGIN;
2848 	}
2849 	DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);	/* it's important for atn stop */
2850 	/* SCSI command */
2851 	DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_IN);
2852 }
2853 
2854 
nop0(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb,u16 * pscsi_status)2855 static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2856 		u16 *pscsi_status)
2857 {
2858 }
2859 
2860 
nop1(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb,u16 * pscsi_status)2861 static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2862 		u16 *pscsi_status)
2863 {
2864 }
2865 
2866 
set_xfer_rate(struct AdapterCtlBlk * acb,struct DeviceCtlBlk * dcb)2867 static void set_xfer_rate(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb)
2868 {
2869 	struct DeviceCtlBlk *i;
2870 
2871 	/* set all lun device's  period, offset */
2872 	if (dcb->identify_msg & 0x07)
2873 		return;
2874 
2875 	if (acb->scan_devices) {
2876 		current_sync_offset = dcb->sync_offset;
2877 		return;
2878 	}
2879 
2880 	list_for_each_entry(i, &acb->dcb_list, list)
2881 		if (i->target_id == dcb->target_id) {
2882 			i->sync_period = dcb->sync_period;
2883 			i->sync_offset = dcb->sync_offset;
2884 			i->sync_mode = dcb->sync_mode;
2885 			i->min_nego_period = dcb->min_nego_period;
2886 		}
2887 }
2888 
2889 
disconnect(struct AdapterCtlBlk * acb)2890 static void disconnect(struct AdapterCtlBlk *acb)
2891 {
2892 	struct DeviceCtlBlk *dcb = acb->active_dcb;
2893 	struct ScsiReqBlk *srb;
2894 
2895 	if (!dcb) {
2896 		dprintkl(KERN_ERR, "disconnect: No such device\n");
2897 		udelay(500);
2898 		/* Suspend queue for a while */
2899 		acb->last_reset =
2900 		    jiffies + HZ / 2 +
2901 		    HZ * acb->eeprom.delay_time;
2902 		clear_fifo(acb, "disconnectEx");
2903 		DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT);
2904 		return;
2905 	}
2906 	srb = dcb->active_srb;
2907 	acb->active_dcb = NULL;
2908 	dprintkdbg(DBG_0, "disconnect: (0x%p)\n", srb->cmd);
2909 
2910 	srb->scsi_phase = PH_BUS_FREE;	/* initial phase */
2911 	clear_fifo(acb, "disconnect");
2912 	DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT);
2913 	if (srb->state & SRB_UNEXPECT_RESEL) {
2914 		dprintkl(KERN_ERR,
2915 			"disconnect: Unexpected reselection <%02i-%i>\n",
2916 			dcb->target_id, dcb->target_lun);
2917 		srb->state = 0;
2918 		waiting_process_next(acb);
2919 	} else if (srb->state & SRB_ABORT_SENT) {
2920 		dcb->flag &= ~ABORT_DEV_;
2921 		acb->last_reset = jiffies + HZ / 2 + 1;
2922 		dprintkl(KERN_ERR, "disconnect: SRB_ABORT_SENT\n");
2923 		doing_srb_done(acb, DID_ABORT, srb->cmd, 1);
2924 		waiting_process_next(acb);
2925 	} else {
2926 		if ((srb->state & (SRB_START_ + SRB_MSGOUT))
2927 		    || !(srb->
2928 			 state & (SRB_DISCONNECT + SRB_COMPLETED))) {
2929 			/*
2930 			 * Selection time out
2931 			 * SRB_START_ || SRB_MSGOUT || (!SRB_DISCONNECT && !SRB_COMPLETED)
2932 			 */
2933 			/* Unexp. Disc / Sel Timeout */
2934 			if (srb->state != SRB_START_
2935 			    && srb->state != SRB_MSGOUT) {
2936 				srb->state = SRB_READY;
2937 				dprintkl(KERN_DEBUG,
2938 					"disconnect: (0x%p) Unexpected\n",
2939 					srb->cmd);
2940 				srb->target_status = SCSI_STAT_SEL_TIMEOUT;
2941 				goto disc1;
2942 			} else {
2943 				/* Normal selection timeout */
2944 				dprintkdbg(DBG_KG, "disconnect: (0x%p) "
2945 					"<%02i-%i> SelTO\n", srb->cmd,
2946 					dcb->target_id, dcb->target_lun);
2947 				if (srb->retry_count++ > DC395x_MAX_RETRIES
2948 				    || acb->scan_devices) {
2949 					srb->target_status =
2950 					    SCSI_STAT_SEL_TIMEOUT;
2951 					goto disc1;
2952 				}
2953 				free_tag(dcb, srb);
2954 				list_move(&srb->list, &dcb->srb_waiting_list);
2955 				dprintkdbg(DBG_KG,
2956 					"disconnect: (0x%p) Retry\n",
2957 					srb->cmd);
2958 				waiting_set_timer(acb, HZ / 20);
2959 			}
2960 		} else if (srb->state & SRB_DISCONNECT) {
2961 			u8 bval = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
2962 			/*
2963 			 * SRB_DISCONNECT (This is what we expect!)
2964 			 */
2965 			if (bval & 0x40) {
2966 				dprintkdbg(DBG_0, "disconnect: SCSI bus stat "
2967 					" 0x%02x: ACK set! Other controllers?\n",
2968 					bval);
2969 				/* It could come from another initiator, therefore don't do much ! */
2970 			} else
2971 				waiting_process_next(acb);
2972 		} else if (srb->state & SRB_COMPLETED) {
2973 		      disc1:
2974 			/*
2975 			 ** SRB_COMPLETED
2976 			 */
2977 			free_tag(dcb, srb);
2978 			dcb->active_srb = NULL;
2979 			srb->state = SRB_FREE;
2980 			srb_done(acb, dcb, srb);
2981 		}
2982 	}
2983 }
2984 
2985 
reselect(struct AdapterCtlBlk * acb)2986 static void reselect(struct AdapterCtlBlk *acb)
2987 {
2988 	struct DeviceCtlBlk *dcb = acb->active_dcb;
2989 	struct ScsiReqBlk *srb = NULL;
2990 	u16 rsel_tar_lun_id;
2991 	u8 id, lun;
2992 	u8 arblostflag = 0;
2993 	dprintkdbg(DBG_0, "reselect: acb=%p\n", acb);
2994 
2995 	clear_fifo(acb, "reselect");
2996 	/*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT | DO_DATALATCH); */
2997 	/* Read Reselected Target ID and LUN */
2998 	rsel_tar_lun_id = DC395x_read16(acb, TRM_S1040_SCSI_TARGETID);
2999 	if (dcb) {		/* Arbitration lost but Reselection win */
3000 		srb = dcb->active_srb;
3001 		if (!srb) {
3002 			dprintkl(KERN_DEBUG, "reselect: Arb lost Resel won, "
3003 				"but active_srb == NULL\n");
3004 			DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);	/* it's important for atn stop */
3005 			return;
3006 		}
3007 		/* Why the if ? */
3008 		if (!acb->scan_devices) {
3009 			dprintkdbg(DBG_KG, "reselect: (0x%p) <%02i-%i> "
3010 				"Arb lost but Resel win rsel=%i stat=0x%04x\n",
3011 				srb->cmd, dcb->target_id,
3012 				dcb->target_lun, rsel_tar_lun_id,
3013 				DC395x_read16(acb, TRM_S1040_SCSI_STATUS));
3014 			arblostflag = 1;
3015 			/*srb->state |= SRB_DISCONNECT; */
3016 
3017 			srb->state = SRB_READY;
3018 			free_tag(dcb, srb);
3019 			list_move(&srb->list, &dcb->srb_waiting_list);
3020 			waiting_set_timer(acb, HZ / 20);
3021 
3022 			/* return; */
3023 		}
3024 	}
3025 	/* Read Reselected Target Id and LUN */
3026 	if (!(rsel_tar_lun_id & (IDENTIFY_BASE << 8)))
3027 		dprintkl(KERN_DEBUG, "reselect: Expects identify msg. "
3028 			"Got %i!\n", rsel_tar_lun_id);
3029 	id = rsel_tar_lun_id & 0xff;
3030 	lun = (rsel_tar_lun_id >> 8) & 7;
3031 	dcb = find_dcb(acb, id, lun);
3032 	if (!dcb) {
3033 		dprintkl(KERN_ERR, "reselect: From non existent device "
3034 			"<%02i-%i>\n", id, lun);
3035 		DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);	/* it's important for atn stop */
3036 		return;
3037 	}
3038 	acb->active_dcb = dcb;
3039 
3040 	if (!(dcb->dev_mode & NTC_DO_DISCONNECT))
3041 		dprintkl(KERN_DEBUG, "reselect: in spite of forbidden "
3042 			"disconnection? <%02i-%i>\n",
3043 			dcb->target_id, dcb->target_lun);
3044 
3045 	if (dcb->sync_mode & EN_TAG_QUEUEING /*&& !arblostflag */) {
3046 		srb = acb->tmp_srb;
3047 		dcb->active_srb = srb;
3048 	} else {
3049 		/* There can be only one! */
3050 		srb = dcb->active_srb;
3051 		if (!srb || !(srb->state & SRB_DISCONNECT)) {
3052 			/*
3053 			 * abort command
3054 			 */
3055 			dprintkl(KERN_DEBUG,
3056 				"reselect: w/o disconnected cmds <%02i-%i>\n",
3057 				dcb->target_id, dcb->target_lun);
3058 			srb = acb->tmp_srb;
3059 			srb->state = SRB_UNEXPECT_RESEL;
3060 			dcb->active_srb = srb;
3061 			enable_msgout_abort(acb, srb);
3062 		} else {
3063 			if (dcb->flag & ABORT_DEV_) {
3064 				/*srb->state = SRB_ABORT_SENT; */
3065 				enable_msgout_abort(acb, srb);
3066 			} else
3067 				srb->state = SRB_DATA_XFER;
3068 
3069 		}
3070 	}
3071 	srb->scsi_phase = PH_BUS_FREE;	/* initial phase */
3072 
3073 	/* Program HA ID, target ID, period and offset */
3074 	dprintkdbg(DBG_0, "reselect: select <%i>\n", dcb->target_id);
3075 	DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id);	/* host   ID */
3076 	DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id);		/* target ID */
3077 	DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset);		/* offset    */
3078 	DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period);		/* sync period, wide */
3079 	DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);		/* it's important for atn stop */
3080 	/* SCSI command */
3081 	DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
3082 }
3083 
3084 
tagq_blacklist(char * name)3085 static inline u8 tagq_blacklist(char *name)
3086 {
3087 #ifndef DC395x_NO_TAGQ
3088 #if 0
3089 	u8 i;
3090 	for (i = 0; i < BADDEVCNT; i++)
3091 		if (memcmp(name, DC395x_baddevname1[i], 28) == 0)
3092 			return 1;
3093 #endif
3094 	return 0;
3095 #else
3096 	return 1;
3097 #endif
3098 }
3099 
3100 
disc_tagq_set(struct DeviceCtlBlk * dcb,struct ScsiInqData * ptr)3101 static void disc_tagq_set(struct DeviceCtlBlk *dcb, struct ScsiInqData *ptr)
3102 {
3103 	/* Check for SCSI format (ANSI and Response data format) */
3104 	if ((ptr->Vers & 0x07) >= 2 || (ptr->RDF & 0x0F) == 2) {
3105 		if ((ptr->Flags & SCSI_INQ_CMDQUEUE)
3106 		    && (dcb->dev_mode & NTC_DO_TAG_QUEUEING) &&
3107 		    /*(dcb->dev_mode & NTC_DO_DISCONNECT) */
3108 		    /* ((dcb->dev_type == TYPE_DISK)
3109 		       || (dcb->dev_type == TYPE_MOD)) && */
3110 		    !tagq_blacklist(((char *)ptr) + 8)) {
3111 			if (dcb->max_command == 1)
3112 				dcb->max_command =
3113 				    dcb->acb->tag_max_num;
3114 			dcb->sync_mode |= EN_TAG_QUEUEING;
3115 			/*dcb->tag_mask = 0; */
3116 		} else
3117 			dcb->max_command = 1;
3118 	}
3119 }
3120 
3121 
add_dev(struct AdapterCtlBlk * acb,struct DeviceCtlBlk * dcb,struct ScsiInqData * ptr)3122 static void add_dev(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3123 		struct ScsiInqData *ptr)
3124 {
3125 	u8 bval1 = ptr->DevType & SCSI_DEVTYPE;
3126 	dcb->dev_type = bval1;
3127 	/* if (bval1 == TYPE_DISK || bval1 == TYPE_MOD) */
3128 	disc_tagq_set(dcb, ptr);
3129 }
3130 
3131 
3132 /* unmap mapped pci regions from SRB */
pci_unmap_srb(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb)3133 static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
3134 {
3135 	struct scsi_cmnd *cmd = srb->cmd;
3136 	enum dma_data_direction dir = cmd->sc_data_direction;
3137 
3138 	if (scsi_sg_count(cmd) && dir != DMA_NONE) {
3139 		/* unmap DC395x SG list */
3140 		dprintkdbg(DBG_SG, "pci_unmap_srb: list=%08x(%05x)\n",
3141 			srb->sg_bus_addr, SEGMENTX_LEN);
3142 		dma_unmap_single(&acb->dev->dev, srb->sg_bus_addr, SEGMENTX_LEN,
3143 				DMA_TO_DEVICE);
3144 		dprintkdbg(DBG_SG, "pci_unmap_srb: segs=%i buffer=%p\n",
3145 			   scsi_sg_count(cmd), scsi_bufflen(cmd));
3146 		/* unmap the sg segments */
3147 		scsi_dma_unmap(cmd);
3148 	}
3149 }
3150 
3151 
3152 /* unmap mapped pci sense buffer from SRB */
pci_unmap_srb_sense(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb)3153 static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb,
3154 		struct ScsiReqBlk *srb)
3155 {
3156 	if (!(srb->flag & AUTO_REQSENSE))
3157 		return;
3158 	/* Unmap sense buffer */
3159 	dprintkdbg(DBG_SG, "pci_unmap_srb_sense: buffer=%08x\n",
3160 	       srb->segment_x[0].address);
3161 	dma_unmap_single(&acb->dev->dev, srb->segment_x[0].address,
3162 			 srb->segment_x[0].length, DMA_FROM_DEVICE);
3163 	/* Restore SG stuff */
3164 	srb->total_xfer_length = srb->xferred;
3165 	srb->segment_x[0].address =
3166 	    srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address;
3167 	srb->segment_x[0].length =
3168 	    srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length;
3169 }
3170 
3171 
3172 /*
3173  * Complete execution of a SCSI command
3174  * Signal completion to the generic SCSI driver
3175  */
srb_done(struct AdapterCtlBlk * acb,struct DeviceCtlBlk * dcb,struct ScsiReqBlk * srb)3176 static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3177 		struct ScsiReqBlk *srb)
3178 {
3179 	u8 tempcnt, status;
3180 	struct scsi_cmnd *cmd = srb->cmd;
3181 	enum dma_data_direction dir = cmd->sc_data_direction;
3182 	int ckc_only = 1;
3183 
3184 	dprintkdbg(DBG_1, "srb_done: (0x%p) <%02i-%i>\n", srb->cmd,
3185 		srb->cmd->device->id, (u8)srb->cmd->device->lun);
3186 	dprintkdbg(DBG_SG, "srb_done: srb=%p sg=%i(%i/%i) buf=%p\n",
3187 		   srb, scsi_sg_count(cmd), srb->sg_index, srb->sg_count,
3188 		   scsi_sgtalbe(cmd));
3189 	status = srb->target_status;
3190 	if (srb->flag & AUTO_REQSENSE) {
3191 		dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE1\n");
3192 		pci_unmap_srb_sense(acb, srb);
3193 		/*
3194 		 ** target status..........................
3195 		 */
3196 		srb->flag &= ~AUTO_REQSENSE;
3197 		srb->adapter_status = 0;
3198 		srb->target_status = CHECK_CONDITION << 1;
3199 		if (debug_enabled(DBG_1)) {
3200 			switch (cmd->sense_buffer[2] & 0x0f) {
3201 			case NOT_READY:
3202 				dprintkl(KERN_DEBUG,
3203 				     "ReqSense: NOT_READY cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3204 				     cmd->cmnd[0], dcb->target_id,
3205 				     dcb->target_lun, status, acb->scan_devices);
3206 				break;
3207 			case UNIT_ATTENTION:
3208 				dprintkl(KERN_DEBUG,
3209 				     "ReqSense: UNIT_ATTENTION cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3210 				     cmd->cmnd[0], dcb->target_id,
3211 				     dcb->target_lun, status, acb->scan_devices);
3212 				break;
3213 			case ILLEGAL_REQUEST:
3214 				dprintkl(KERN_DEBUG,
3215 				     "ReqSense: ILLEGAL_REQUEST cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3216 				     cmd->cmnd[0], dcb->target_id,
3217 				     dcb->target_lun, status, acb->scan_devices);
3218 				break;
3219 			case MEDIUM_ERROR:
3220 				dprintkl(KERN_DEBUG,
3221 				     "ReqSense: MEDIUM_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3222 				     cmd->cmnd[0], dcb->target_id,
3223 				     dcb->target_lun, status, acb->scan_devices);
3224 				break;
3225 			case HARDWARE_ERROR:
3226 				dprintkl(KERN_DEBUG,
3227 				     "ReqSense: HARDWARE_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3228 				     cmd->cmnd[0], dcb->target_id,
3229 				     dcb->target_lun, status, acb->scan_devices);
3230 				break;
3231 			}
3232 			if (cmd->sense_buffer[7] >= 6)
3233 				printk("sense=0x%02x ASC=0x%02x ASCQ=0x%02x "
3234 					"(0x%08x 0x%08x)\n",
3235 					cmd->sense_buffer[2], cmd->sense_buffer[12],
3236 					cmd->sense_buffer[13],
3237 					*((unsigned int *)(cmd->sense_buffer + 3)),
3238 					*((unsigned int *)(cmd->sense_buffer + 8)));
3239 			else
3240 				printk("sense=0x%02x No ASC/ASCQ (0x%08x)\n",
3241 					cmd->sense_buffer[2],
3242 					*((unsigned int *)(cmd->sense_buffer + 3)));
3243 		}
3244 
3245 		if (status == (CHECK_CONDITION << 1)) {
3246 			cmd->result = DID_BAD_TARGET << 16;
3247 			goto ckc_e;
3248 		}
3249 		dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE2\n");
3250 
3251 		if (srb->total_xfer_length
3252 		    && srb->total_xfer_length >= cmd->underflow)
3253 			cmd->result =
3254 			    MK_RES_LNX(DRIVER_SENSE, DID_OK,
3255 				       srb->end_message, CHECK_CONDITION);
3256 		/*SET_RES_DID(cmd->result,DID_OK) */
3257 		else
3258 			cmd->result =
3259 			    MK_RES_LNX(DRIVER_SENSE, DID_OK,
3260 				       srb->end_message, CHECK_CONDITION);
3261 
3262 		goto ckc_e;
3263 	}
3264 
3265 /*************************************************************/
3266 	if (status) {
3267 		/*
3268 		 * target status..........................
3269 		 */
3270 		if (status_byte(status) == CHECK_CONDITION) {
3271 			request_sense(acb, dcb, srb);
3272 			return;
3273 		} else if (status_byte(status) == QUEUE_FULL) {
3274 			tempcnt = (u8)list_size(&dcb->srb_going_list);
3275 			dprintkl(KERN_INFO, "QUEUE_FULL for dev <%02i-%i> with %i cmnds\n",
3276 			     dcb->target_id, dcb->target_lun, tempcnt);
3277 			if (tempcnt > 1)
3278 				tempcnt--;
3279 			dcb->max_command = tempcnt;
3280 			free_tag(dcb, srb);
3281 			list_move(&srb->list, &dcb->srb_waiting_list);
3282 			waiting_set_timer(acb, HZ / 20);
3283 			srb->adapter_status = 0;
3284 			srb->target_status = 0;
3285 			return;
3286 		} else if (status == SCSI_STAT_SEL_TIMEOUT) {
3287 			srb->adapter_status = H_SEL_TIMEOUT;
3288 			srb->target_status = 0;
3289 			cmd->result = DID_NO_CONNECT << 16;
3290 		} else {
3291 			srb->adapter_status = 0;
3292 			SET_RES_DID(cmd->result, DID_ERROR);
3293 			SET_RES_MSG(cmd->result, srb->end_message);
3294 			SET_RES_TARGET(cmd->result, status);
3295 
3296 		}
3297 	} else {
3298 		/*
3299 		 ** process initiator status..........................
3300 		 */
3301 		status = srb->adapter_status;
3302 		if (status & H_OVER_UNDER_RUN) {
3303 			srb->target_status = 0;
3304 			SET_RES_DID(cmd->result, DID_OK);
3305 			SET_RES_MSG(cmd->result, srb->end_message);
3306 		} else if (srb->status & PARITY_ERROR) {
3307 			SET_RES_DID(cmd->result, DID_PARITY);
3308 			SET_RES_MSG(cmd->result, srb->end_message);
3309 		} else {	/* No error */
3310 
3311 			srb->adapter_status = 0;
3312 			srb->target_status = 0;
3313 			SET_RES_DID(cmd->result, DID_OK);
3314 		}
3315 	}
3316 
3317 	ckc_only = 0;
3318 /* Check Error Conditions */
3319       ckc_e:
3320 
3321 	pci_unmap_srb(acb, srb);
3322 
3323 	if (cmd->cmnd[0] == INQUIRY) {
3324 		unsigned char *base = NULL;
3325 		struct ScsiInqData *ptr;
3326 		unsigned long flags = 0;
3327 		struct scatterlist* sg = scsi_sglist(cmd);
3328 		size_t offset = 0, len = sizeof(struct ScsiInqData);
3329 
3330 		local_irq_save(flags);
3331 		base = scsi_kmap_atomic_sg(sg, scsi_sg_count(cmd), &offset, &len);
3332 		ptr = (struct ScsiInqData *)(base + offset);
3333 
3334 		if (!ckc_only && (cmd->result & RES_DID) == 0
3335 		    && cmd->cmnd[2] == 0 && scsi_bufflen(cmd) >= 8
3336 		    && dir != DMA_NONE && ptr && (ptr->Vers & 0x07) >= 2)
3337 			dcb->inquiry7 = ptr->Flags;
3338 
3339 	/*if( srb->cmd->cmnd[0] == INQUIRY && */
3340 	/*  (host_byte(cmd->result) == DID_OK || status_byte(cmd->result) & CHECK_CONDITION) ) */
3341 		if ((cmd->result == (DID_OK << 16) ||
3342 		     status_byte(cmd->result) == CHECK_CONDITION)) {
3343 			if (!dcb->init_tcq_flag) {
3344 				add_dev(acb, dcb, ptr);
3345 				dcb->init_tcq_flag = 1;
3346 			}
3347 		}
3348 
3349 		scsi_kunmap_atomic_sg(base);
3350 		local_irq_restore(flags);
3351 	}
3352 
3353 	/* Here is the info for Doug Gilbert's sg3 ... */
3354 	scsi_set_resid(cmd, srb->total_xfer_length);
3355 	/* This may be interpreted by sb. or not ... */
3356 	cmd->SCp.this_residual = srb->total_xfer_length;
3357 	cmd->SCp.buffers_residual = 0;
3358 	if (debug_enabled(DBG_KG)) {
3359 		if (srb->total_xfer_length)
3360 			dprintkdbg(DBG_KG, "srb_done: (0x%p) <%02i-%i> "
3361 				"cmnd=0x%02x Missed %i bytes\n",
3362 				cmd, cmd->device->id, (u8)cmd->device->lun,
3363 				cmd->cmnd[0], srb->total_xfer_length);
3364 	}
3365 
3366 	if (srb != acb->tmp_srb) {
3367 		/* Add to free list */
3368 		dprintkdbg(DBG_0, "srb_done: (0x%p) done result=0x%08x\n",
3369 			cmd, cmd->result);
3370 		list_move_tail(&srb->list, &acb->srb_free_list);
3371 	} else {
3372 		dprintkl(KERN_ERR, "srb_done: ERROR! Completed cmd with tmp_srb\n");
3373 	}
3374 
3375 	cmd->scsi_done(cmd);
3376 	waiting_process_next(acb);
3377 }
3378 
3379 
3380 /* abort all cmds in our queues */
doing_srb_done(struct AdapterCtlBlk * acb,u8 did_flag,struct scsi_cmnd * cmd,u8 force)3381 static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_flag,
3382 		struct scsi_cmnd *cmd, u8 force)
3383 {
3384 	struct DeviceCtlBlk *dcb;
3385 	dprintkl(KERN_INFO, "doing_srb_done: pids ");
3386 
3387 	list_for_each_entry(dcb, &acb->dcb_list, list) {
3388 		struct ScsiReqBlk *srb;
3389 		struct ScsiReqBlk *tmp;
3390 		struct scsi_cmnd *p;
3391 
3392 		list_for_each_entry_safe(srb, tmp, &dcb->srb_going_list, list) {
3393 			enum dma_data_direction dir;
3394 			int result;
3395 
3396 			p = srb->cmd;
3397 			dir = p->sc_data_direction;
3398 			result = MK_RES(0, did_flag, 0, 0);
3399 			printk("G:%p(%02i-%i) ", p,
3400 			       p->device->id, (u8)p->device->lun);
3401 			list_del(&srb->list);
3402 			free_tag(dcb, srb);
3403 			list_add_tail(&srb->list, &acb->srb_free_list);
3404 			p->result = result;
3405 			pci_unmap_srb_sense(acb, srb);
3406 			pci_unmap_srb(acb, srb);
3407 			if (force) {
3408 				/* For new EH, we normally don't need to give commands back,
3409 				 * as they all complete or all time out */
3410 				p->scsi_done(p);
3411 			}
3412 		}
3413 		if (!list_empty(&dcb->srb_going_list))
3414 			dprintkl(KERN_DEBUG,
3415 			       "How could the ML send cmnds to the Going queue? <%02i-%i>\n",
3416 			       dcb->target_id, dcb->target_lun);
3417 		if (dcb->tag_mask)
3418 			dprintkl(KERN_DEBUG,
3419 			       "tag_mask for <%02i-%i> should be empty, is %08x!\n",
3420 			       dcb->target_id, dcb->target_lun,
3421 			       dcb->tag_mask);
3422 
3423 		/* Waiting queue */
3424 		list_for_each_entry_safe(srb, tmp, &dcb->srb_waiting_list, list) {
3425 			int result;
3426 			p = srb->cmd;
3427 
3428 			result = MK_RES(0, did_flag, 0, 0);
3429 			printk("W:%p<%02i-%i>", p, p->device->id,
3430 			       (u8)p->device->lun);
3431 			list_move_tail(&srb->list, &acb->srb_free_list);
3432 			p->result = result;
3433 			pci_unmap_srb_sense(acb, srb);
3434 			pci_unmap_srb(acb, srb);
3435 			if (force) {
3436 				/* For new EH, we normally don't need to give commands back,
3437 				 * as they all complete or all time out */
3438 				cmd->scsi_done(cmd);
3439 			}
3440 		}
3441 		if (!list_empty(&dcb->srb_waiting_list))
3442 			dprintkl(KERN_DEBUG, "ML queued %i cmnds again to <%02i-%i>\n",
3443 			     list_size(&dcb->srb_waiting_list), dcb->target_id,
3444 			     dcb->target_lun);
3445 		dcb->flag &= ~ABORT_DEV_;
3446 	}
3447 	printk("\n");
3448 }
3449 
3450 
reset_scsi_bus(struct AdapterCtlBlk * acb)3451 static void reset_scsi_bus(struct AdapterCtlBlk *acb)
3452 {
3453 	dprintkdbg(DBG_0, "reset_scsi_bus: acb=%p\n", acb);
3454 	acb->acb_flag |= RESET_DEV;	/* RESET_DETECT, RESET_DONE, RESET_DEV */
3455 	DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI);
3456 
3457 	while (!(DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET))
3458 		/* nothing */;
3459 }
3460 
3461 
set_basic_config(struct AdapterCtlBlk * acb)3462 static void set_basic_config(struct AdapterCtlBlk *acb)
3463 {
3464 	u8 bval;
3465 	u16 wval;
3466 	DC395x_write8(acb, TRM_S1040_SCSI_TIMEOUT, acb->sel_timeout);
3467 	if (acb->config & HCC_PARITY)
3468 		bval = PHASELATCH | INITIATOR | BLOCKRST | PARITYCHECK;
3469 	else
3470 		bval = PHASELATCH | INITIATOR | BLOCKRST;
3471 
3472 	DC395x_write8(acb, TRM_S1040_SCSI_CONFIG0, bval);
3473 
3474 	/* program configuration 1: Act_Neg (+ Act_Neg_Enh? + Fast_Filter? + DataDis?) */
3475 	DC395x_write8(acb, TRM_S1040_SCSI_CONFIG1, 0x03);	/* was 0x13: default */
3476 	/* program Host ID                  */
3477 	DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id);
3478 	/* set ansynchronous transfer       */
3479 	DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, 0x00);
3480 	/* Turn LED control off */
3481 	wval = DC395x_read16(acb, TRM_S1040_GEN_CONTROL) & 0x7F;
3482 	DC395x_write16(acb, TRM_S1040_GEN_CONTROL, wval);
3483 	/* DMA config          */
3484 	wval = DC395x_read16(acb, TRM_S1040_DMA_CONFIG) & ~DMA_FIFO_CTRL;
3485 	wval |=
3486 	    DMA_FIFO_HALF_HALF | DMA_ENHANCE /*| DMA_MEM_MULTI_READ */ ;
3487 	DC395x_write16(acb, TRM_S1040_DMA_CONFIG, wval);
3488 	/* Clear pending interrupt status */
3489 	DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
3490 	/* Enable SCSI interrupt    */
3491 	DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x7F);
3492 	DC395x_write8(acb, TRM_S1040_DMA_INTEN, EN_SCSIINTR | EN_DMAXFERERROR
3493 		      /*| EN_DMAXFERABORT | EN_DMAXFERCOMP | EN_FORCEDMACOMP */
3494 		      );
3495 }
3496 
3497 
scsi_reset_detect(struct AdapterCtlBlk * acb)3498 static void scsi_reset_detect(struct AdapterCtlBlk *acb)
3499 {
3500 	dprintkl(KERN_INFO, "scsi_reset_detect: acb=%p\n", acb);
3501 	/* delay half a second */
3502 	if (timer_pending(&acb->waiting_timer))
3503 		del_timer(&acb->waiting_timer);
3504 
3505 	DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
3506 	DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
3507 	/*DC395x_write8(acb, TRM_S1040_DMA_CONTROL,STOPDMAXFER); */
3508 	udelay(500);
3509 	/* Maybe we locked up the bus? Then lets wait even longer ... */
3510 	acb->last_reset =
3511 	    jiffies + 5 * HZ / 2 +
3512 	    HZ * acb->eeprom.delay_time;
3513 
3514 	clear_fifo(acb, "scsi_reset_detect");
3515 	set_basic_config(acb);
3516 	/*1.25 */
3517 	/*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT); */
3518 
3519 	if (acb->acb_flag & RESET_DEV) {	/* RESET_DETECT, RESET_DONE, RESET_DEV */
3520 		acb->acb_flag |= RESET_DONE;
3521 	} else {
3522 		acb->acb_flag |= RESET_DETECT;
3523 		reset_dev_param(acb);
3524 		doing_srb_done(acb, DID_RESET, NULL, 1);
3525 		/*DC395x_RecoverSRB( acb ); */
3526 		acb->active_dcb = NULL;
3527 		acb->acb_flag = 0;
3528 		waiting_process_next(acb);
3529 	}
3530 }
3531 
3532 
request_sense(struct AdapterCtlBlk * acb,struct DeviceCtlBlk * dcb,struct ScsiReqBlk * srb)3533 static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3534 		struct ScsiReqBlk *srb)
3535 {
3536 	struct scsi_cmnd *cmd = srb->cmd;
3537 	dprintkdbg(DBG_1, "request_sense: (0x%p) <%02i-%i>\n",
3538 		cmd, cmd->device->id, (u8)cmd->device->lun);
3539 
3540 	srb->flag |= AUTO_REQSENSE;
3541 	srb->adapter_status = 0;
3542 	srb->target_status = 0;
3543 
3544 	/* KG: Can this prevent crap sense data ? */
3545 	memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
3546 
3547 	/* Save some data */
3548 	srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address =
3549 	    srb->segment_x[0].address;
3550 	srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length =
3551 	    srb->segment_x[0].length;
3552 	srb->xferred = srb->total_xfer_length;
3553 	/* srb->segment_x : a one entry of S/G list table */
3554 	srb->total_xfer_length = SCSI_SENSE_BUFFERSIZE;
3555 	srb->segment_x[0].length = SCSI_SENSE_BUFFERSIZE;
3556 	/* Map sense buffer */
3557 	srb->segment_x[0].address = dma_map_single(&acb->dev->dev,
3558 			cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE,
3559 			DMA_FROM_DEVICE);
3560 	dprintkdbg(DBG_SG, "request_sense: map buffer %p->%08x(%05x)\n",
3561 	       cmd->sense_buffer, srb->segment_x[0].address,
3562 	       SCSI_SENSE_BUFFERSIZE);
3563 	srb->sg_count = 1;
3564 	srb->sg_index = 0;
3565 
3566 	if (start_scsi(acb, dcb, srb)) {	/* Should only happen, if sb. else grabs the bus */
3567 		dprintkl(KERN_DEBUG,
3568 			"request_sense: (0x%p) failed <%02i-%i>\n",
3569 			srb->cmd, dcb->target_id, dcb->target_lun);
3570 		list_move(&srb->list, &dcb->srb_waiting_list);
3571 		waiting_set_timer(acb, HZ / 100);
3572 	}
3573 }
3574 
3575 
3576 /**
3577  * device_alloc - Allocate a new device instance. This create the
3578  * devices instance and sets up all the data items. The adapter
3579  * instance is required to obtain confiuration information for this
3580  * device. This does *not* add this device to the adapters device
3581  * list.
3582  *
3583  * @acb: The adapter to obtain configuration information from.
3584  * @target: The target for the new device.
3585  * @lun: The lun for the new device.
3586  *
3587  * Return the new device if successful or NULL on failure.
3588  **/
device_alloc(struct AdapterCtlBlk * acb,u8 target,u8 lun)3589 static struct DeviceCtlBlk *device_alloc(struct AdapterCtlBlk *acb,
3590 		u8 target, u8 lun)
3591 {
3592 	struct NvRamType *eeprom = &acb->eeprom;
3593 	u8 period_index = eeprom->target[target].period & 0x07;
3594 	struct DeviceCtlBlk *dcb;
3595 
3596 	dcb = kmalloc(sizeof(struct DeviceCtlBlk), GFP_ATOMIC);
3597 	dprintkdbg(DBG_0, "device_alloc: <%02i-%i>\n", target, lun);
3598 	if (!dcb)
3599 		return NULL;
3600 	dcb->acb = NULL;
3601 	INIT_LIST_HEAD(&dcb->srb_going_list);
3602 	INIT_LIST_HEAD(&dcb->srb_waiting_list);
3603 	dcb->active_srb = NULL;
3604 	dcb->tag_mask = 0;
3605 	dcb->max_command = 1;
3606 	dcb->target_id = target;
3607 	dcb->target_lun = lun;
3608 	dcb->dev_mode = eeprom->target[target].cfg0;
3609 #ifndef DC395x_NO_DISCONNECT
3610 	dcb->identify_msg =
3611 	    IDENTIFY(dcb->dev_mode & NTC_DO_DISCONNECT, lun);
3612 #else
3613 	dcb->identify_msg = IDENTIFY(0, lun);
3614 #endif
3615 	dcb->inquiry7 = 0;
3616 	dcb->sync_mode = 0;
3617 	dcb->min_nego_period = clock_period[period_index];
3618 	dcb->sync_period = 0;
3619 	dcb->sync_offset = 0;
3620 	dcb->flag = 0;
3621 
3622 #ifndef DC395x_NO_WIDE
3623 	if ((dcb->dev_mode & NTC_DO_WIDE_NEGO)
3624 	    && (acb->config & HCC_WIDE_CARD))
3625 		dcb->sync_mode |= WIDE_NEGO_ENABLE;
3626 #endif
3627 #ifndef DC395x_NO_SYNC
3628 	if (dcb->dev_mode & NTC_DO_SYNC_NEGO)
3629 		if (!(lun) || current_sync_offset)
3630 			dcb->sync_mode |= SYNC_NEGO_ENABLE;
3631 #endif
3632 	if (dcb->target_lun != 0) {
3633 		/* Copy settings */
3634 		struct DeviceCtlBlk *p = NULL, *iter;
3635 
3636 		list_for_each_entry(iter, &acb->dcb_list, list)
3637 			if (iter->target_id == dcb->target_id) {
3638 				p = iter;
3639 				break;
3640 			}
3641 
3642 		if (!p) {
3643 			kfree(dcb);
3644 			return NULL;
3645 		}
3646 
3647 		dprintkdbg(DBG_1,
3648 		       "device_alloc: <%02i-%i> copy from <%02i-%i>\n",
3649 		       dcb->target_id, dcb->target_lun,
3650 		       p->target_id, p->target_lun);
3651 		dcb->sync_mode = p->sync_mode;
3652 		dcb->sync_period = p->sync_period;
3653 		dcb->min_nego_period = p->min_nego_period;
3654 		dcb->sync_offset = p->sync_offset;
3655 		dcb->inquiry7 = p->inquiry7;
3656 	}
3657 	return dcb;
3658 }
3659 
3660 
3661 /**
3662  * adapter_add_device - Adds the device instance to the adaptor instance.
3663  *
3664  * @acb: The adapter device to be updated
3665  * @dcb: A newly created and initialised device instance to add.
3666  **/
adapter_add_device(struct AdapterCtlBlk * acb,struct DeviceCtlBlk * dcb)3667 static void adapter_add_device(struct AdapterCtlBlk *acb,
3668 		struct DeviceCtlBlk *dcb)
3669 {
3670 	/* backpointer to adapter */
3671 	dcb->acb = acb;
3672 
3673 	/* set run_robin to this device if it is currently empty */
3674 	if (list_empty(&acb->dcb_list))
3675 		acb->dcb_run_robin = dcb;
3676 
3677 	/* add device to list */
3678 	list_add_tail(&dcb->list, &acb->dcb_list);
3679 
3680 	/* update device maps */
3681 	acb->dcb_map[dcb->target_id] |= (1 << dcb->target_lun);
3682 	acb->children[dcb->target_id][dcb->target_lun] = dcb;
3683 }
3684 
3685 
3686 /**
3687  * adapter_remove_device - Removes the device instance from the adaptor
3688  * instance. The device instance is not check in any way or freed by this.
3689  * The caller is expected to take care of that. This will simply remove the
3690  * device from the adapters data strcutures.
3691  *
3692  * @acb: The adapter device to be updated
3693  * @dcb: A device that has previously been added to the adapter.
3694  **/
adapter_remove_device(struct AdapterCtlBlk * acb,struct DeviceCtlBlk * dcb)3695 static void adapter_remove_device(struct AdapterCtlBlk *acb,
3696 		struct DeviceCtlBlk *dcb)
3697 {
3698 	struct DeviceCtlBlk *i;
3699 	struct DeviceCtlBlk *tmp;
3700 	dprintkdbg(DBG_0, "adapter_remove_device: <%02i-%i>\n",
3701 		dcb->target_id, dcb->target_lun);
3702 
3703 	/* fix up any pointers to this device that we have in the adapter */
3704 	if (acb->active_dcb == dcb)
3705 		acb->active_dcb = NULL;
3706 	if (acb->dcb_run_robin == dcb)
3707 		acb->dcb_run_robin = dcb_get_next(&acb->dcb_list, dcb);
3708 
3709 	/* unlink from list */
3710 	list_for_each_entry_safe(i, tmp, &acb->dcb_list, list)
3711 		if (dcb == i) {
3712 			list_del(&i->list);
3713 			break;
3714 		}
3715 
3716 	/* clear map and children */
3717 	acb->dcb_map[dcb->target_id] &= ~(1 << dcb->target_lun);
3718 	acb->children[dcb->target_id][dcb->target_lun] = NULL;
3719 	dcb->acb = NULL;
3720 }
3721 
3722 
3723 /**
3724  * adapter_remove_and_free_device - Removes a single device from the adapter
3725  * and then frees the device information.
3726  *
3727  * @acb: The adapter device to be updated
3728  * @dcb: A device that has previously been added to the adapter.
3729  */
adapter_remove_and_free_device(struct AdapterCtlBlk * acb,struct DeviceCtlBlk * dcb)3730 static void adapter_remove_and_free_device(struct AdapterCtlBlk *acb,
3731 		struct DeviceCtlBlk *dcb)
3732 {
3733 	if (list_size(&dcb->srb_going_list) > 1) {
3734 		dprintkdbg(DBG_1, "adapter_remove_and_free_device: <%02i-%i> "
3735 		           "Won't remove because of %i active requests.\n",
3736 			   dcb->target_id, dcb->target_lun,
3737 			   list_size(&dcb->srb_going_list));
3738 		return;
3739 	}
3740 	adapter_remove_device(acb, dcb);
3741 	kfree(dcb);
3742 }
3743 
3744 
3745 /**
3746  * adapter_remove_and_free_all_devices - Removes and frees all of the
3747  * devices associated with the specified adapter.
3748  *
3749  * @acb: The adapter from which all devices should be removed.
3750  **/
adapter_remove_and_free_all_devices(struct AdapterCtlBlk * acb)3751 static void adapter_remove_and_free_all_devices(struct AdapterCtlBlk* acb)
3752 {
3753 	struct DeviceCtlBlk *dcb;
3754 	struct DeviceCtlBlk *tmp;
3755 	dprintkdbg(DBG_1, "adapter_remove_and_free_all_devices: num=%i\n",
3756 		   list_size(&acb->dcb_list));
3757 
3758 	list_for_each_entry_safe(dcb, tmp, &acb->dcb_list, list)
3759 		adapter_remove_and_free_device(acb, dcb);
3760 }
3761 
3762 
3763 /**
3764  * dc395x_slave_alloc - Called by the scsi mid layer to tell us about a new
3765  * scsi device that we need to deal with. We allocate a new device and then
3766  * insert that device into the adapters device list.
3767  *
3768  * @scsi_device: The new scsi device that we need to handle.
3769  **/
dc395x_slave_alloc(struct scsi_device * scsi_device)3770 static int dc395x_slave_alloc(struct scsi_device *scsi_device)
3771 {
3772 	struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata;
3773 	struct DeviceCtlBlk *dcb;
3774 
3775 	dcb = device_alloc(acb, scsi_device->id, scsi_device->lun);
3776 	if (!dcb)
3777 		return -ENOMEM;
3778 	adapter_add_device(acb, dcb);
3779 
3780 	return 0;
3781 }
3782 
3783 
3784 /**
3785  * dc395x_slave_destroy - Called by the scsi mid layer to tell us about a
3786  * device that is going away.
3787  *
3788  * @scsi_device: The new scsi device that we need to handle.
3789  **/
dc395x_slave_destroy(struct scsi_device * scsi_device)3790 static void dc395x_slave_destroy(struct scsi_device *scsi_device)
3791 {
3792 	struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata;
3793 	struct DeviceCtlBlk *dcb = find_dcb(acb, scsi_device->id, scsi_device->lun);
3794 	if (dcb)
3795 		adapter_remove_and_free_device(acb, dcb);
3796 }
3797 
3798 
3799 
3800 
3801 /**
3802  * trms1040_wait_30us: wait for 30 us
3803  *
3804  * Waits for 30us (using the chip by the looks of it..)
3805  *
3806  * @io_port: base I/O address
3807  **/
trms1040_wait_30us(unsigned long io_port)3808 static void trms1040_wait_30us(unsigned long io_port)
3809 {
3810 	/* ScsiPortStallExecution(30); wait 30 us */
3811 	outb(5, io_port + TRM_S1040_GEN_TIMER);
3812 	while (!(inb(io_port + TRM_S1040_GEN_STATUS) & GTIMEOUT))
3813 		/* nothing */ ;
3814 }
3815 
3816 
3817 /**
3818  * trms1040_write_cmd - write the secified command and address to
3819  * chip
3820  *
3821  * @io_port:	base I/O address
3822  * @cmd:	SB + op code (command) to send
3823  * @addr:	address to send
3824  **/
trms1040_write_cmd(unsigned long io_port,u8 cmd,u8 addr)3825 static void trms1040_write_cmd(unsigned long io_port, u8 cmd, u8 addr)
3826 {
3827 	int i;
3828 	u8 send_data;
3829 
3830 	/* program SB + OP code */
3831 	for (i = 0; i < 3; i++, cmd <<= 1) {
3832 		send_data = NVR_SELECT;
3833 		if (cmd & 0x04)	/* Start from bit 2 */
3834 			send_data |= NVR_BITOUT;
3835 
3836 		outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
3837 		trms1040_wait_30us(io_port);
3838 		outb((send_data | NVR_CLOCK),
3839 		     io_port + TRM_S1040_GEN_NVRAM);
3840 		trms1040_wait_30us(io_port);
3841 	}
3842 
3843 	/* send address */
3844 	for (i = 0; i < 7; i++, addr <<= 1) {
3845 		send_data = NVR_SELECT;
3846 		if (addr & 0x40)	/* Start from bit 6 */
3847 			send_data |= NVR_BITOUT;
3848 
3849 		outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
3850 		trms1040_wait_30us(io_port);
3851 		outb((send_data | NVR_CLOCK),
3852 		     io_port + TRM_S1040_GEN_NVRAM);
3853 		trms1040_wait_30us(io_port);
3854 	}
3855 	outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
3856 	trms1040_wait_30us(io_port);
3857 }
3858 
3859 
3860 /**
3861  * trms1040_set_data - store a single byte in the eeprom
3862  *
3863  * Called from write all to write a single byte into the SSEEPROM
3864  * Which is done one bit at a time.
3865  *
3866  * @io_port:	base I/O address
3867  * @addr:	offset into EEPROM
3868  * @byte:	bytes to write
3869  **/
trms1040_set_data(unsigned long io_port,u8 addr,u8 byte)3870 static void trms1040_set_data(unsigned long io_port, u8 addr, u8 byte)
3871 {
3872 	int i;
3873 	u8 send_data;
3874 
3875 	/* Send write command & address */
3876 	trms1040_write_cmd(io_port, 0x05, addr);
3877 
3878 	/* Write data */
3879 	for (i = 0; i < 8; i++, byte <<= 1) {
3880 		send_data = NVR_SELECT;
3881 		if (byte & 0x80)	/* Start from bit 7 */
3882 			send_data |= NVR_BITOUT;
3883 
3884 		outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
3885 		trms1040_wait_30us(io_port);
3886 		outb((send_data | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
3887 		trms1040_wait_30us(io_port);
3888 	}
3889 	outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
3890 	trms1040_wait_30us(io_port);
3891 
3892 	/* Disable chip select */
3893 	outb(0, io_port + TRM_S1040_GEN_NVRAM);
3894 	trms1040_wait_30us(io_port);
3895 
3896 	outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
3897 	trms1040_wait_30us(io_port);
3898 
3899 	/* Wait for write ready */
3900 	while (1) {
3901 		outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
3902 		trms1040_wait_30us(io_port);
3903 
3904 		outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
3905 		trms1040_wait_30us(io_port);
3906 
3907 		if (inb(io_port + TRM_S1040_GEN_NVRAM) & NVR_BITIN)
3908 			break;
3909 	}
3910 
3911 	/*  Disable chip select */
3912 	outb(0, io_port + TRM_S1040_GEN_NVRAM);
3913 }
3914 
3915 
3916 /**
3917  * trms1040_write_all - write 128 bytes to the eeprom
3918  *
3919  * Write the supplied 128 bytes to the chips SEEPROM
3920  *
3921  * @eeprom:	the data to write
3922  * @io_port:	the base io port
3923  **/
trms1040_write_all(struct NvRamType * eeprom,unsigned long io_port)3924 static void trms1040_write_all(struct NvRamType *eeprom, unsigned long io_port)
3925 {
3926 	u8 *b_eeprom = (u8 *)eeprom;
3927 	u8 addr;
3928 
3929 	/* Enable SEEPROM */
3930 	outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM),
3931 	     io_port + TRM_S1040_GEN_CONTROL);
3932 
3933 	/* write enable */
3934 	trms1040_write_cmd(io_port, 0x04, 0xFF);
3935 	outb(0, io_port + TRM_S1040_GEN_NVRAM);
3936 	trms1040_wait_30us(io_port);
3937 
3938 	/* write */
3939 	for (addr = 0; addr < 128; addr++, b_eeprom++)
3940 		trms1040_set_data(io_port, addr, *b_eeprom);
3941 
3942 	/* write disable */
3943 	trms1040_write_cmd(io_port, 0x04, 0x00);
3944 	outb(0, io_port + TRM_S1040_GEN_NVRAM);
3945 	trms1040_wait_30us(io_port);
3946 
3947 	/* Disable SEEPROM */
3948 	outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM),
3949 	     io_port + TRM_S1040_GEN_CONTROL);
3950 }
3951 
3952 
3953 /**
3954  * trms1040_get_data - get a single byte from the eeprom
3955  *
3956  * Called from read all to read a single byte into the SSEEPROM
3957  * Which is done one bit at a time.
3958  *
3959  * @io_port:	base I/O address
3960  * @addr:	offset into SEEPROM
3961  *
3962  * Returns the byte read.
3963  **/
trms1040_get_data(unsigned long io_port,u8 addr)3964 static u8 trms1040_get_data(unsigned long io_port, u8 addr)
3965 {
3966 	int i;
3967 	u8 read_byte;
3968 	u8 result = 0;
3969 
3970 	/* Send read command & address */
3971 	trms1040_write_cmd(io_port, 0x06, addr);
3972 
3973 	/* read data */
3974 	for (i = 0; i < 8; i++) {
3975 		outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
3976 		trms1040_wait_30us(io_port);
3977 		outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
3978 
3979 		/* Get data bit while falling edge */
3980 		read_byte = inb(io_port + TRM_S1040_GEN_NVRAM);
3981 		result <<= 1;
3982 		if (read_byte & NVR_BITIN)
3983 			result |= 1;
3984 
3985 		trms1040_wait_30us(io_port);
3986 	}
3987 
3988 	/* Disable chip select */
3989 	outb(0, io_port + TRM_S1040_GEN_NVRAM);
3990 	return result;
3991 }
3992 
3993 
3994 /**
3995  * trms1040_read_all - read all bytes from the eeprom
3996  *
3997  * Read the 128 bytes from the SEEPROM.
3998  *
3999  * @eeprom:	where to store the data
4000  * @io_port:	the base io port
4001  **/
trms1040_read_all(struct NvRamType * eeprom,unsigned long io_port)4002 static void trms1040_read_all(struct NvRamType *eeprom, unsigned long io_port)
4003 {
4004 	u8 *b_eeprom = (u8 *)eeprom;
4005 	u8 addr;
4006 
4007 	/* Enable SEEPROM */
4008 	outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM),
4009 	     io_port + TRM_S1040_GEN_CONTROL);
4010 
4011 	/* read details */
4012 	for (addr = 0; addr < 128; addr++, b_eeprom++)
4013 		*b_eeprom = trms1040_get_data(io_port, addr);
4014 
4015 	/* Disable SEEPROM */
4016 	outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM),
4017 	     io_port + TRM_S1040_GEN_CONTROL);
4018 }
4019 
4020 
4021 
4022 /**
4023  * check_eeprom - get and check contents of the eeprom
4024  *
4025  * Read seeprom 128 bytes into the memory provider in eeprom.
4026  * Checks the checksum and if it's not correct it uses a set of default
4027  * values.
4028  *
4029  * @eeprom:	caller allocated strcuture to read the eeprom data into
4030  * @io_port:	io port to read from
4031  **/
check_eeprom(struct NvRamType * eeprom,unsigned long io_port)4032 static void check_eeprom(struct NvRamType *eeprom, unsigned long io_port)
4033 {
4034 	u16 *w_eeprom = (u16 *)eeprom;
4035 	u16 w_addr;
4036 	u16 cksum;
4037 	u32 d_addr;
4038 	u32 *d_eeprom;
4039 
4040 	trms1040_read_all(eeprom, io_port);	/* read eeprom */
4041 
4042 	cksum = 0;
4043 	for (w_addr = 0, w_eeprom = (u16 *)eeprom; w_addr < 64;
4044 	     w_addr++, w_eeprom++)
4045 		cksum += *w_eeprom;
4046 	if (cksum != 0x1234) {
4047 		/*
4048 		 * Checksum is wrong.
4049 		 * Load a set of defaults into the eeprom buffer
4050 		 */
4051 		dprintkl(KERN_WARNING,
4052 			"EEProm checksum error: using default values and options.\n");
4053 		eeprom->sub_vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM;
4054 		eeprom->sub_vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8);
4055 		eeprom->sub_sys_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040;
4056 		eeprom->sub_sys_id[1] =
4057 		    (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8);
4058 		eeprom->sub_class = 0x00;
4059 		eeprom->vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM;
4060 		eeprom->vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8);
4061 		eeprom->device_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040;
4062 		eeprom->device_id[1] =
4063 		    (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8);
4064 		eeprom->reserved = 0x00;
4065 
4066 		for (d_addr = 0, d_eeprom = (u32 *)eeprom->target;
4067 		     d_addr < 16; d_addr++, d_eeprom++)
4068 			*d_eeprom = 0x00000077;	/* cfg3,cfg2,period,cfg0 */
4069 
4070 		*d_eeprom++ = 0x04000F07;	/* max_tag,delay_time,channel_cfg,scsi_id */
4071 		*d_eeprom++ = 0x00000015;	/* reserved1,boot_lun,boot_target,reserved0 */
4072 		for (d_addr = 0; d_addr < 12; d_addr++, d_eeprom++)
4073 			*d_eeprom = 0x00;
4074 
4075 		/* Now load defaults (maybe set by boot/module params) */
4076 		set_safe_settings();
4077 		fix_settings();
4078 		eeprom_override(eeprom);
4079 
4080 		eeprom->cksum = 0x00;
4081 		for (w_addr = 0, cksum = 0, w_eeprom = (u16 *)eeprom;
4082 		     w_addr < 63; w_addr++, w_eeprom++)
4083 			cksum += *w_eeprom;
4084 
4085 		*w_eeprom = 0x1234 - cksum;
4086 		trms1040_write_all(eeprom, io_port);
4087 		eeprom->delay_time = cfg_data[CFG_RESET_DELAY].value;
4088 	} else {
4089 		set_safe_settings();
4090 		eeprom_index_to_delay(eeprom);
4091 		eeprom_override(eeprom);
4092 	}
4093 }
4094 
4095 
4096 /**
4097  * print_eeprom_settings - output the eeprom settings
4098  * to the kernel log so people can see what they were.
4099  *
4100  * @eeprom: The eeprom data strucutre to show details for.
4101  **/
print_eeprom_settings(struct NvRamType * eeprom)4102 static void print_eeprom_settings(struct NvRamType *eeprom)
4103 {
4104 	dprintkl(KERN_INFO, "Used settings: AdapterID=%02i, Speed=%i(%02i.%01iMHz), dev_mode=0x%02x\n",
4105 		eeprom->scsi_id,
4106 		eeprom->target[0].period,
4107 		clock_speed[eeprom->target[0].period] / 10,
4108 		clock_speed[eeprom->target[0].period] % 10,
4109 		eeprom->target[0].cfg0);
4110 	dprintkl(KERN_INFO, "               AdaptMode=0x%02x, Tags=%i(%02i), DelayReset=%is\n",
4111 		eeprom->channel_cfg, eeprom->max_tag,
4112 		1 << eeprom->max_tag, eeprom->delay_time);
4113 }
4114 
4115 
4116 /* Free SG tables */
adapter_sg_tables_free(struct AdapterCtlBlk * acb)4117 static void adapter_sg_tables_free(struct AdapterCtlBlk *acb)
4118 {
4119 	int i;
4120 	const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN;
4121 
4122 	for (i = 0; i < DC395x_MAX_SRB_CNT; i += srbs_per_page)
4123 		kfree(acb->srb_array[i].segment_x);
4124 }
4125 
4126 
4127 /*
4128  * Allocate SG tables; as we have to pci_map them, an SG list (struct SGentry*)
4129  * should never cross a page boundary */
adapter_sg_tables_alloc(struct AdapterCtlBlk * acb)4130 static int adapter_sg_tables_alloc(struct AdapterCtlBlk *acb)
4131 {
4132 	const unsigned mem_needed = (DC395x_MAX_SRB_CNT+1)
4133 	                            *SEGMENTX_LEN;
4134 	int pages = (mem_needed+(PAGE_SIZE-1))/PAGE_SIZE;
4135 	const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN;
4136 	int srb_idx = 0;
4137 	unsigned i = 0;
4138 	struct SGentry *ptr;
4139 
4140 	for (i = 0; i < DC395x_MAX_SRB_CNT; i++)
4141 		acb->srb_array[i].segment_x = NULL;
4142 
4143 	dprintkdbg(DBG_1, "Allocate %i pages for SG tables\n", pages);
4144 	while (pages--) {
4145 		ptr = kmalloc(PAGE_SIZE, GFP_KERNEL);
4146 		if (!ptr) {
4147 			adapter_sg_tables_free(acb);
4148 			return 1;
4149 		}
4150 		dprintkdbg(DBG_1, "Allocate %li bytes at %p for SG segments %i\n",
4151 			PAGE_SIZE, ptr, srb_idx);
4152 		i = 0;
4153 		while (i < srbs_per_page && srb_idx < DC395x_MAX_SRB_CNT)
4154 			acb->srb_array[srb_idx++].segment_x =
4155 			    ptr + (i++ * DC395x_MAX_SG_LISTENTRY);
4156 	}
4157 	if (i < srbs_per_page)
4158 		acb->srb.segment_x =
4159 		    ptr + (i * DC395x_MAX_SG_LISTENTRY);
4160 	else
4161 		dprintkl(KERN_DEBUG, "No space for tmsrb SG table reserved?!\n");
4162 	return 0;
4163 }
4164 
4165 
4166 
4167 /**
4168  * adapter_print_config - print adapter connection and termination
4169  * config
4170  *
4171  * The io port in the adapter needs to have been set before calling
4172  * this function.
4173  *
4174  * @acb: The adapter to print the information for.
4175  **/
adapter_print_config(struct AdapterCtlBlk * acb)4176 static void adapter_print_config(struct AdapterCtlBlk *acb)
4177 {
4178 	u8 bval;
4179 
4180 	bval = DC395x_read8(acb, TRM_S1040_GEN_STATUS);
4181 	dprintkl(KERN_INFO, "%sConnectors: ",
4182 		((bval & WIDESCSI) ? "(Wide) " : ""));
4183 	if (!(bval & CON5068))
4184 		printk("ext%s ", !(bval & EXT68HIGH) ? "68" : "50");
4185 	if (!(bval & CON68))
4186 		printk("int68%s ", !(bval & INT68HIGH) ? "" : "(50)");
4187 	if (!(bval & CON50))
4188 		printk("int50 ");
4189 	if ((bval & (CON5068 | CON50 | CON68)) ==
4190 	    0 /*(CON5068 | CON50 | CON68) */ )
4191 		printk(" Oops! (All 3?) ");
4192 	bval = DC395x_read8(acb, TRM_S1040_GEN_CONTROL);
4193 	printk(" Termination: ");
4194 	if (bval & DIS_TERM)
4195 		printk("Disabled\n");
4196 	else {
4197 		if (bval & AUTOTERM)
4198 			printk("Auto ");
4199 		if (bval & LOW8TERM)
4200 			printk("Low ");
4201 		if (bval & UP8TERM)
4202 			printk("High ");
4203 		printk("\n");
4204 	}
4205 }
4206 
4207 
4208 /**
4209  * adapter_init_params - Initialize the various parameters in the
4210  * adapter structure. Note that the pointer to the scsi_host is set
4211  * early (when this instance is created) and the io_port and irq
4212  * values are set later after they have been reserved. This just gets
4213  * everything set to a good starting position.
4214  *
4215  * The eeprom structure in the adapter needs to have been set before
4216  * calling this function.
4217  *
4218  * @acb: The adapter to initialize.
4219  **/
adapter_init_params(struct AdapterCtlBlk * acb)4220 static void adapter_init_params(struct AdapterCtlBlk *acb)
4221 {
4222 	struct NvRamType *eeprom = &acb->eeprom;
4223 	int i;
4224 
4225 	/* NOTE: acb->scsi_host is set at scsi_host/acb creation time */
4226 	/* NOTE: acb->io_port_base is set at port registration time */
4227 	/* NOTE: acb->io_port_len is set at port registration time */
4228 
4229 	INIT_LIST_HEAD(&acb->dcb_list);
4230 	acb->dcb_run_robin = NULL;
4231 	acb->active_dcb = NULL;
4232 
4233 	INIT_LIST_HEAD(&acb->srb_free_list);
4234 	/*  temp SRB for Q tag used or abort command used  */
4235 	acb->tmp_srb = &acb->srb;
4236 	timer_setup(&acb->waiting_timer, waiting_timeout, 0);
4237 	timer_setup(&acb->selto_timer, NULL, 0);
4238 
4239 	acb->srb_count = DC395x_MAX_SRB_CNT;
4240 
4241 	acb->sel_timeout = DC395x_SEL_TIMEOUT;	/* timeout=250ms */
4242 	/* NOTE: acb->irq_level is set at IRQ registration time */
4243 
4244 	acb->tag_max_num = 1 << eeprom->max_tag;
4245 	if (acb->tag_max_num > 30)
4246 		acb->tag_max_num = 30;
4247 
4248 	acb->acb_flag = 0;	/* RESET_DETECT, RESET_DONE, RESET_DEV */
4249 	acb->gmode2 = eeprom->channel_cfg;
4250 	acb->config = 0;	/* NOTE: actually set in adapter_init_chip */
4251 
4252 	if (eeprom->channel_cfg & NAC_SCANLUN)
4253 		acb->lun_chk = 1;
4254 	acb->scan_devices = 1;
4255 
4256 	acb->scsi_host->this_id = eeprom->scsi_id;
4257 	acb->hostid_bit = (1 << acb->scsi_host->this_id);
4258 
4259 	for (i = 0; i < DC395x_MAX_SCSI_ID; i++)
4260 		acb->dcb_map[i] = 0;
4261 
4262 	acb->msg_len = 0;
4263 
4264 	/* link static array of srbs into the srb free list */
4265 	for (i = 0; i < acb->srb_count - 1; i++)
4266 		list_add_tail(&acb->srb_array[i].list, &acb->srb_free_list);
4267 }
4268 
4269 
4270 /**
4271  * adapter_init_host - Initialize the scsi host instance based on
4272  * values that we have already stored in the adapter instance. There's
4273  * some mention that a lot of these are deprecated, so we won't use
4274  * them (we'll use the ones in the adapter instance) but we'll fill
4275  * them in in case something else needs them.
4276  *
4277  * The eeprom structure, irq and io ports in the adapter need to have
4278  * been set before calling this function.
4279  *
4280  * @host: The scsi host instance to fill in the values for.
4281  **/
adapter_init_scsi_host(struct Scsi_Host * host)4282 static void adapter_init_scsi_host(struct Scsi_Host *host)
4283 {
4284         struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata;
4285 	struct NvRamType *eeprom = &acb->eeprom;
4286 
4287 	host->max_cmd_len = 24;
4288 	host->can_queue = DC395x_MAX_CMD_QUEUE;
4289 	host->cmd_per_lun = DC395x_MAX_CMD_PER_LUN;
4290 	host->this_id = (int)eeprom->scsi_id;
4291 	host->io_port = acb->io_port_base;
4292 	host->n_io_port = acb->io_port_len;
4293 	host->dma_channel = -1;
4294 	host->unique_id = acb->io_port_base;
4295 	host->irq = acb->irq_level;
4296 	acb->last_reset = jiffies;
4297 
4298 	host->max_id = 16;
4299 	if (host->max_id - 1 == eeprom->scsi_id)
4300 		host->max_id--;
4301 
4302 	if (eeprom->channel_cfg & NAC_SCANLUN)
4303 		host->max_lun = 8;
4304 	else
4305 		host->max_lun = 1;
4306 }
4307 
4308 
4309 /**
4310  * adapter_init_chip - Get the chip into a know state and figure out
4311  * some of the settings that apply to this adapter.
4312  *
4313  * The io port in the adapter needs to have been set before calling
4314  * this function. The config will be configured correctly on return.
4315  *
4316  * @acb: The adapter which we are to init.
4317  **/
adapter_init_chip(struct AdapterCtlBlk * acb)4318 static void adapter_init_chip(struct AdapterCtlBlk *acb)
4319 {
4320         struct NvRamType *eeprom = &acb->eeprom;
4321 
4322         /* Mask all the interrupt */
4323 	DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00);
4324 	DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00);
4325 
4326 	/* Reset SCSI module */
4327 	DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
4328 
4329 	/* Reset PCI/DMA module */
4330 	DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
4331 	udelay(20);
4332 
4333 	/* program configuration 0 */
4334 	acb->config = HCC_AUTOTERM | HCC_PARITY;
4335 	if (DC395x_read8(acb, TRM_S1040_GEN_STATUS) & WIDESCSI)
4336 		acb->config |= HCC_WIDE_CARD;
4337 
4338 	if (eeprom->channel_cfg & NAC_POWERON_SCSI_RESET)
4339 		acb->config |= HCC_SCSI_RESET;
4340 
4341 	if (acb->config & HCC_SCSI_RESET) {
4342 		dprintkl(KERN_INFO, "Performing initial SCSI bus reset\n");
4343 		DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI);
4344 
4345 		/*while (!( DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET )); */
4346 		/*spin_unlock_irq (&io_request_lock); */
4347 		udelay(500);
4348 
4349 		acb->last_reset =
4350 		    jiffies + HZ / 2 +
4351 		    HZ * acb->eeprom.delay_time;
4352 
4353 		/*spin_lock_irq (&io_request_lock); */
4354 	}
4355 }
4356 
4357 
4358 /**
4359  * init_adapter - Grab the resource for the card, setup the adapter
4360  * information, set the card into a known state, create the various
4361  * tables etc etc. This basically gets all adapter information all up
4362  * to date, initialised and gets the chip in sync with it.
4363  *
4364  * @host:	This hosts adapter structure
4365  * @io_port:	The base I/O port
4366  * @irq:	IRQ
4367  *
4368  * Returns 0 if the initialization succeeds, any other value on
4369  * failure.
4370  **/
adapter_init(struct AdapterCtlBlk * acb,unsigned long io_port,u32 io_port_len,unsigned int irq)4371 static int adapter_init(struct AdapterCtlBlk *acb, unsigned long io_port,
4372 			u32 io_port_len, unsigned int irq)
4373 {
4374 	if (!request_region(io_port, io_port_len, DC395X_NAME)) {
4375 		dprintkl(KERN_ERR, "Failed to reserve IO region 0x%lx\n", io_port);
4376 		goto failed;
4377 	}
4378 	/* store port base to indicate we have registered it */
4379 	acb->io_port_base = io_port;
4380 	acb->io_port_len = io_port_len;
4381 
4382 	if (request_irq(irq, dc395x_interrupt, IRQF_SHARED, DC395X_NAME, acb)) {
4383 	    	/* release the region we just claimed */
4384 		dprintkl(KERN_INFO, "Failed to register IRQ\n");
4385 		goto failed;
4386 	}
4387 	/* store irq to indicate we have registered it */
4388 	acb->irq_level = irq;
4389 
4390 	/* get eeprom configuration information and command line settings etc */
4391 	check_eeprom(&acb->eeprom, io_port);
4392  	print_eeprom_settings(&acb->eeprom);
4393 
4394 	/* setup adapter control block */
4395 	adapter_init_params(acb);
4396 
4397 	/* display card connectors/termination settings */
4398  	adapter_print_config(acb);
4399 
4400 	if (adapter_sg_tables_alloc(acb)) {
4401 		dprintkl(KERN_DEBUG, "Memory allocation for SG tables failed\n");
4402 		goto failed;
4403 	}
4404 	adapter_init_scsi_host(acb->scsi_host);
4405 	adapter_init_chip(acb);
4406 	set_basic_config(acb);
4407 
4408 	dprintkdbg(DBG_0,
4409 		"adapter_init: acb=%p, pdcb_map=%p psrb_array=%p "
4410 		"size{acb=0x%04x dcb=0x%04x srb=0x%04x}\n",
4411 		acb, acb->dcb_map, acb->srb_array, sizeof(struct AdapterCtlBlk),
4412 		sizeof(struct DeviceCtlBlk), sizeof(struct ScsiReqBlk));
4413 	return 0;
4414 
4415 failed:
4416 	if (acb->irq_level)
4417 		free_irq(acb->irq_level, acb);
4418 	if (acb->io_port_base)
4419 		release_region(acb->io_port_base, acb->io_port_len);
4420 	adapter_sg_tables_free(acb);
4421 
4422 	return 1;
4423 }
4424 
4425 
4426 /**
4427  * adapter_uninit_chip - cleanly shut down the scsi controller chip,
4428  * stopping all operations and disabling interrupt generation on the
4429  * card.
4430  *
4431  * @acb: The adapter which we are to shutdown.
4432  **/
adapter_uninit_chip(struct AdapterCtlBlk * acb)4433 static void adapter_uninit_chip(struct AdapterCtlBlk *acb)
4434 {
4435 	/* disable interrupts */
4436 	DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0);
4437 	DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0);
4438 
4439 	/* reset the scsi bus */
4440 	if (acb->config & HCC_SCSI_RESET)
4441 		reset_scsi_bus(acb);
4442 
4443 	/* clear any pending interrupt state */
4444 	DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
4445 }
4446 
4447 
4448 
4449 /**
4450  * adapter_uninit - Shut down the chip and release any resources that
4451  * we had allocated. Once this returns the adapter should not be used
4452  * anymore.
4453  *
4454  * @acb: The adapter which we are to un-initialize.
4455  **/
adapter_uninit(struct AdapterCtlBlk * acb)4456 static void adapter_uninit(struct AdapterCtlBlk *acb)
4457 {
4458 	unsigned long flags;
4459 	DC395x_LOCK_IO(acb->scsi_host, flags);
4460 
4461 	/* remove timers */
4462 	if (timer_pending(&acb->waiting_timer))
4463 		del_timer(&acb->waiting_timer);
4464 	if (timer_pending(&acb->selto_timer))
4465 		del_timer(&acb->selto_timer);
4466 
4467 	adapter_uninit_chip(acb);
4468 	adapter_remove_and_free_all_devices(acb);
4469 	DC395x_UNLOCK_IO(acb->scsi_host, flags);
4470 
4471 	if (acb->irq_level)
4472 		free_irq(acb->irq_level, acb);
4473 	if (acb->io_port_base)
4474 		release_region(acb->io_port_base, acb->io_port_len);
4475 
4476 	adapter_sg_tables_free(acb);
4477 }
4478 
4479 
4480 #undef YESNO
4481 #define YESNO(YN) \
4482  if (YN) seq_printf(m, " Yes ");\
4483  else seq_printf(m, " No  ")
4484 
dc395x_show_info(struct seq_file * m,struct Scsi_Host * host)4485 static int dc395x_show_info(struct seq_file *m, struct Scsi_Host *host)
4486 {
4487 	struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata;
4488 	int spd, spd1;
4489 	struct DeviceCtlBlk *dcb;
4490 	unsigned long flags;
4491 	int dev;
4492 
4493 	seq_puts(m, DC395X_BANNER " PCI SCSI Host Adapter\n"
4494 		" Driver Version " DC395X_VERSION "\n");
4495 
4496 	DC395x_LOCK_IO(acb->scsi_host, flags);
4497 
4498 	seq_printf(m, "SCSI Host Nr %i, ", host->host_no);
4499 	seq_printf(m, "DC395U/UW/F DC315/U %s\n",
4500 		(acb->config & HCC_WIDE_CARD) ? "Wide" : "");
4501 	seq_printf(m, "io_port_base 0x%04lx, ", acb->io_port_base);
4502 	seq_printf(m, "irq_level 0x%04x, ", acb->irq_level);
4503 	seq_printf(m, " SelTimeout %ims\n", (1638 * acb->sel_timeout) / 1000);
4504 
4505 	seq_printf(m, "MaxID %i, MaxLUN %llu, ", host->max_id, host->max_lun);
4506 	seq_printf(m, "AdapterID %i\n", host->this_id);
4507 
4508 	seq_printf(m, "tag_max_num %i", acb->tag_max_num);
4509 	/*seq_printf(m, ", DMA_Status %i\n", DC395x_read8(acb, TRM_S1040_DMA_STATUS)); */
4510 	seq_printf(m, ", FilterCfg 0x%02x",
4511 		DC395x_read8(acb, TRM_S1040_SCSI_CONFIG1));
4512 	seq_printf(m, ", DelayReset %is\n", acb->eeprom.delay_time);
4513 	/*seq_printf(m, "\n"); */
4514 
4515 	seq_printf(m, "Nr of DCBs: %i\n", list_size(&acb->dcb_list));
4516 	seq_printf(m, "Map of attached LUNs: %8ph\n", &acb->dcb_map[0]);
4517 	seq_printf(m, "                      %8ph\n", &acb->dcb_map[8]);
4518 
4519 	seq_puts(m,
4520 		 "Un ID LUN Prty Sync Wide DsCn SndS TagQ nego_period SyncFreq SyncOffs MaxCmd\n");
4521 
4522 	dev = 0;
4523 	list_for_each_entry(dcb, &acb->dcb_list, list) {
4524 		int nego_period;
4525 		seq_printf(m, "%02i %02i  %02i ", dev, dcb->target_id,
4526 			dcb->target_lun);
4527 		YESNO(dcb->dev_mode & NTC_DO_PARITY_CHK);
4528 		YESNO(dcb->sync_offset);
4529 		YESNO(dcb->sync_period & WIDE_SYNC);
4530 		YESNO(dcb->dev_mode & NTC_DO_DISCONNECT);
4531 		YESNO(dcb->dev_mode & NTC_DO_SEND_START);
4532 		YESNO(dcb->sync_mode & EN_TAG_QUEUEING);
4533 		nego_period = clock_period[dcb->sync_period & 0x07] << 2;
4534 		if (dcb->sync_offset)
4535 			seq_printf(m, "  %03i ns ", nego_period);
4536 		else
4537 			seq_printf(m, " (%03i ns)", (dcb->min_nego_period << 2));
4538 
4539 		if (dcb->sync_offset & 0x0f) {
4540 			spd = 1000 / (nego_period);
4541 			spd1 = 1000 % (nego_period);
4542 			spd1 = (spd1 * 10 + nego_period / 2) / (nego_period);
4543 			seq_printf(m, "   %2i.%1i M     %02i ", spd, spd1,
4544 				(dcb->sync_offset & 0x0f));
4545 		} else
4546 			seq_puts(m, "                 ");
4547 
4548 		/* Add more info ... */
4549 		seq_printf(m, "     %02i\n", dcb->max_command);
4550 		dev++;
4551 	}
4552 
4553 	if (timer_pending(&acb->waiting_timer))
4554 		seq_puts(m, "Waiting queue timer running\n");
4555 	else
4556 		seq_putc(m, '\n');
4557 
4558 	list_for_each_entry(dcb, &acb->dcb_list, list) {
4559 		struct ScsiReqBlk *srb;
4560 		if (!list_empty(&dcb->srb_waiting_list))
4561 			seq_printf(m, "DCB (%02i-%i): Waiting: %i:",
4562 				dcb->target_id, dcb->target_lun,
4563 				list_size(&dcb->srb_waiting_list));
4564                 list_for_each_entry(srb, &dcb->srb_waiting_list, list)
4565 			seq_printf(m, " %p", srb->cmd);
4566 		if (!list_empty(&dcb->srb_going_list))
4567 			seq_printf(m, "\nDCB (%02i-%i): Going  : %i:",
4568 				dcb->target_id, dcb->target_lun,
4569 				list_size(&dcb->srb_going_list));
4570 		list_for_each_entry(srb, &dcb->srb_going_list, list)
4571 			seq_printf(m, " %p", srb->cmd);
4572 		if (!list_empty(&dcb->srb_waiting_list) || !list_empty(&dcb->srb_going_list))
4573 			seq_putc(m, '\n');
4574 	}
4575 
4576 	if (debug_enabled(DBG_1)) {
4577 		seq_printf(m, "DCB list for ACB %p:\n", acb);
4578 		list_for_each_entry(dcb, &acb->dcb_list, list) {
4579 			seq_printf(m, "%p -> ", dcb);
4580 		}
4581 		seq_puts(m, "END\n");
4582 	}
4583 
4584 	DC395x_UNLOCK_IO(acb->scsi_host, flags);
4585 	return 0;
4586 }
4587 
4588 
4589 static struct scsi_host_template dc395x_driver_template = {
4590 	.module                 = THIS_MODULE,
4591 	.proc_name              = DC395X_NAME,
4592 	.show_info              = dc395x_show_info,
4593 	.name                   = DC395X_BANNER " " DC395X_VERSION,
4594 	.queuecommand           = dc395x_queue_command,
4595 	.slave_alloc            = dc395x_slave_alloc,
4596 	.slave_destroy          = dc395x_slave_destroy,
4597 	.can_queue              = DC395x_MAX_CAN_QUEUE,
4598 	.this_id                = 7,
4599 	.sg_tablesize           = DC395x_MAX_SG_TABLESIZE,
4600 	.cmd_per_lun            = DC395x_MAX_CMD_PER_LUN,
4601 	.eh_abort_handler       = dc395x_eh_abort,
4602 	.eh_bus_reset_handler   = dc395x_eh_bus_reset,
4603 	.dma_boundary		= PAGE_SIZE - 1,
4604 };
4605 
4606 
4607 /**
4608  * banner_display - Display banner on first instance of driver
4609  * initialized.
4610  **/
banner_display(void)4611 static void banner_display(void)
4612 {
4613 	static int banner_done = 0;
4614 	if (!banner_done)
4615 	{
4616 		dprintkl(KERN_INFO, "%s %s\n", DC395X_BANNER, DC395X_VERSION);
4617 		banner_done = 1;
4618 	}
4619 }
4620 
4621 
4622 /**
4623  * dc395x_init_one - Initialise a single instance of the adapter.
4624  *
4625  * The PCI layer will call this once for each instance of the adapter
4626  * that it finds in the system. The pci_dev strcuture indicates which
4627  * instance we are being called from.
4628  *
4629  * @dev: The PCI device to initialize.
4630  * @id: Looks like a pointer to the entry in our pci device table
4631  * that was actually matched by the PCI subsystem.
4632  *
4633  * Returns 0 on success, or an error code (-ve) on failure.
4634  **/
dc395x_init_one(struct pci_dev * dev,const struct pci_device_id * id)4635 static int dc395x_init_one(struct pci_dev *dev, const struct pci_device_id *id)
4636 {
4637 	struct Scsi_Host *scsi_host = NULL;
4638 	struct AdapterCtlBlk *acb = NULL;
4639 	unsigned long io_port_base;
4640 	unsigned int io_port_len;
4641 	unsigned int irq;
4642 
4643 	dprintkdbg(DBG_0, "Init one instance (%s)\n", pci_name(dev));
4644 	banner_display();
4645 
4646 	if (pci_enable_device(dev))
4647 	{
4648 		dprintkl(KERN_INFO, "PCI Enable device failed.\n");
4649 		return -ENODEV;
4650 	}
4651 	io_port_base = pci_resource_start(dev, 0) & PCI_BASE_ADDRESS_IO_MASK;
4652 	io_port_len = pci_resource_len(dev, 0);
4653 	irq = dev->irq;
4654 	dprintkdbg(DBG_0, "IO_PORT=0x%04lx, IRQ=0x%x\n", io_port_base, dev->irq);
4655 
4656 	/* allocate scsi host information (includes out adapter) */
4657 	scsi_host = scsi_host_alloc(&dc395x_driver_template,
4658 				    sizeof(struct AdapterCtlBlk));
4659 	if (!scsi_host) {
4660 		dprintkl(KERN_INFO, "scsi_host_alloc failed\n");
4661 		goto fail;
4662 	}
4663  	acb = (struct AdapterCtlBlk*)scsi_host->hostdata;
4664  	acb->scsi_host = scsi_host;
4665  	acb->dev = dev;
4666 
4667 	/* initialise the adapter and everything we need */
4668  	if (adapter_init(acb, io_port_base, io_port_len, irq)) {
4669 		dprintkl(KERN_INFO, "adapter init failed\n");
4670 		acb = NULL;
4671 		goto fail;
4672 	}
4673 
4674 	pci_set_master(dev);
4675 
4676 	/* get the scsi mid level to scan for new devices on the bus */
4677 	if (scsi_add_host(scsi_host, &dev->dev)) {
4678 		dprintkl(KERN_ERR, "scsi_add_host failed\n");
4679 		goto fail;
4680 	}
4681 	pci_set_drvdata(dev, scsi_host);
4682 	scsi_scan_host(scsi_host);
4683 
4684 	return 0;
4685 
4686 fail:
4687 	if (acb != NULL)
4688 		adapter_uninit(acb);
4689 	if (scsi_host != NULL)
4690 		scsi_host_put(scsi_host);
4691 	pci_disable_device(dev);
4692 	return -ENODEV;
4693 }
4694 
4695 
4696 /**
4697  * dc395x_remove_one - Called to remove a single instance of the
4698  * adapter.
4699  *
4700  * @dev: The PCI device to initialize.
4701  **/
dc395x_remove_one(struct pci_dev * dev)4702 static void dc395x_remove_one(struct pci_dev *dev)
4703 {
4704 	struct Scsi_Host *scsi_host = pci_get_drvdata(dev);
4705 	struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)(scsi_host->hostdata);
4706 
4707 	dprintkdbg(DBG_0, "dc395x_remove_one: acb=%p\n", acb);
4708 
4709 	scsi_remove_host(scsi_host);
4710 	adapter_uninit(acb);
4711 	pci_disable_device(dev);
4712 	scsi_host_put(scsi_host);
4713 }
4714 
4715 
4716 static struct pci_device_id dc395x_pci_table[] = {
4717 	{
4718 		.vendor		= PCI_VENDOR_ID_TEKRAM,
4719 		.device		= PCI_DEVICE_ID_TEKRAM_TRMS1040,
4720 		.subvendor	= PCI_ANY_ID,
4721 		.subdevice	= PCI_ANY_ID,
4722 	 },
4723 	{}			/* Terminating entry */
4724 };
4725 MODULE_DEVICE_TABLE(pci, dc395x_pci_table);
4726 
4727 
4728 static struct pci_driver dc395x_driver = {
4729 	.name           = DC395X_NAME,
4730 	.id_table       = dc395x_pci_table,
4731 	.probe          = dc395x_init_one,
4732 	.remove         = dc395x_remove_one,
4733 };
4734 module_pci_driver(dc395x_driver);
4735 
4736 MODULE_AUTHOR("C.L. Huang / Erich Chen / Kurt Garloff");
4737 MODULE_DESCRIPTION("SCSI host adapter driver for Tekram TRM-S1040 based adapters: Tekram DC395 and DC315 series");
4738 MODULE_LICENSE("GPL");
4739