xref: /linux/drivers/scsi/dc395x.c (revision 06d07429858317ded2db7986113a9e0129cd599b)
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 #include <scsi/scsi_transport_spi.h>
68 
69 #include "dc395x.h"
70 
71 #define DC395X_NAME	"dc395x"
72 #define DC395X_BANNER	"Tekram DC395(U/UW/F), DC315(U) - ASIC TRM-S1040"
73 #define DC395X_VERSION	"v2.05, 2004/03/08"
74 
75 /*---------------------------------------------------------------------------
76                                   Features
77  ---------------------------------------------------------------------------*/
78 /*
79  * Set to disable parts of the driver
80  */
81 /*#define DC395x_NO_DISCONNECT*/
82 /*#define DC395x_NO_TAGQ*/
83 /*#define DC395x_NO_SYNC*/
84 /*#define DC395x_NO_WIDE*/
85 
86 /*---------------------------------------------------------------------------
87                                   Debugging
88  ---------------------------------------------------------------------------*/
89 /*
90  * Types of debugging that can be enabled and disabled
91  */
92 #define DBG_KG		0x0001
93 #define DBG_0		0x0002
94 #define DBG_1		0x0004
95 #define DBG_SG		0x0020
96 #define DBG_FIFO	0x0040
97 #define DBG_PIO		0x0080
98 
99 
100 /*
101  * Set set of things to output debugging for.
102  * Undefine to remove all debugging
103  */
104 /*#define DEBUG_MASK (DBG_0|DBG_1|DBG_SG|DBG_FIFO|DBG_PIO)*/
105 /*#define  DEBUG_MASK	DBG_0*/
106 
107 
108 /*
109  * Output a kernel mesage at the specified level and append the
110  * driver name and a ": " to the start of the message
111  */
112 #define dprintkl(level, format, arg...)  \
113     printk(level DC395X_NAME ": " format , ## arg)
114 
115 
116 #ifdef DEBUG_MASK
117 /*
118  * print a debug message - this is formated with KERN_DEBUG, then the
119  * driver name followed by a ": " and then the message is output.
120  * This also checks that the specified debug level is enabled before
121  * outputing the message
122  */
123 #define dprintkdbg(type, format, arg...) \
124 	do { \
125 		if ((type) & (DEBUG_MASK)) \
126 			dprintkl(KERN_DEBUG , format , ## arg); \
127 	} while (0)
128 
129 /*
130  * Check if the specified type of debugging is enabled
131  */
132 #define debug_enabled(type)	((DEBUG_MASK) & (type))
133 
134 #else
135 /*
136  * No debugging. Do nothing
137  */
138 #define dprintkdbg(type, format, arg...) \
139 	do {} while (0)
140 #define debug_enabled(type)	(0)
141 
142 #endif
143 
144 
145 #ifndef PCI_VENDOR_ID_TEKRAM
146 #define PCI_VENDOR_ID_TEKRAM                    0x1DE1	/* Vendor ID    */
147 #endif
148 #ifndef PCI_DEVICE_ID_TEKRAM_TRMS1040
149 #define PCI_DEVICE_ID_TEKRAM_TRMS1040           0x0391	/* Device ID    */
150 #endif
151 
152 
153 #define DC395x_LOCK_IO(dev,flags)		spin_lock_irqsave(((struct Scsi_Host *)dev)->host_lock, flags)
154 #define DC395x_UNLOCK_IO(dev,flags)		spin_unlock_irqrestore(((struct Scsi_Host *)dev)->host_lock, flags)
155 
156 #define DC395x_read8(acb,address)		(u8)(inb(acb->io_port_base + (address)))
157 #define DC395x_read16(acb,address)		(u16)(inw(acb->io_port_base + (address)))
158 #define DC395x_read32(acb,address)		(u32)(inl(acb->io_port_base + (address)))
159 #define DC395x_write8(acb,address,value)	outb((value), acb->io_port_base + (address))
160 #define DC395x_write16(acb,address,value)	outw((value), acb->io_port_base + (address))
161 #define DC395x_write32(acb,address,value)	outl((value), acb->io_port_base + (address))
162 
163 #define TAG_NONE 255
164 
165 /*
166  * srb->segement_x is the hw sg list. It is always allocated as a
167  * DC395x_MAX_SG_LISTENTRY entries in a linear block which does not
168  * cross a page boundy.
169  */
170 #define SEGMENTX_LEN	(sizeof(struct SGentry)*DC395x_MAX_SG_LISTENTRY)
171 
172 
173 struct SGentry {
174 	u32 address;		/* bus! address */
175 	u32 length;
176 };
177 
178 /* The SEEPROM structure for TRM_S1040 */
179 struct NVRamTarget {
180 	u8 cfg0;		/* Target configuration byte 0  */
181 	u8 period;		/* Target period                */
182 	u8 cfg2;		/* Target configuration byte 2  */
183 	u8 cfg3;		/* Target configuration byte 3  */
184 };
185 
186 struct NvRamType {
187 	u8 sub_vendor_id[2];	/* 0,1  Sub Vendor ID   */
188 	u8 sub_sys_id[2];	/* 2,3  Sub System ID   */
189 	u8 sub_class;		/* 4    Sub Class       */
190 	u8 vendor_id[2];	/* 5,6  Vendor ID       */
191 	u8 device_id[2];	/* 7,8  Device ID       */
192 	u8 reserved;		/* 9    Reserved        */
193 	struct NVRamTarget target[DC395x_MAX_SCSI_ID];
194 						/** 10,11,12,13
195 						 ** 14,15,16,17
196 						 ** ....
197 						 ** ....
198 						 ** 70,71,72,73
199 						 */
200 	u8 scsi_id;		/* 74 Host Adapter SCSI ID      */
201 	u8 channel_cfg;		/* 75 Channel configuration     */
202 	u8 delay_time;		/* 76 Power on delay time       */
203 	u8 max_tag;		/* 77 Maximum tags              */
204 	u8 reserved0;		/* 78  */
205 	u8 boot_target;		/* 79  */
206 	u8 boot_lun;		/* 80  */
207 	u8 reserved1;		/* 81  */
208 	u16 reserved2[22];	/* 82,..125 */
209 	u16 cksum;		/* 126,127 */
210 };
211 
212 struct ScsiReqBlk {
213 	struct list_head list;		/* next/prev ptrs for srb lists */
214 	struct DeviceCtlBlk *dcb;
215 	struct scsi_cmnd *cmd;
216 
217 	struct SGentry *segment_x;	/* Linear array of hw sg entries (up to 64 entries) */
218 	dma_addr_t sg_bus_addr;	        /* Bus address of sg list (ie, of segment_x) */
219 
220 	u8 sg_count;			/* No of HW sg entries for this request */
221 	u8 sg_index;			/* Index of HW sg entry for this request */
222 	size_t total_xfer_length;	/* Total number of bytes remaining to be transferred */
223 	size_t request_length;		/* Total number of bytes in this request */
224 	/*
225 	 * The sense buffer handling function, request_sense, uses
226 	 * the first hw sg entry (segment_x[0]) and the transfer
227 	 * length (total_xfer_length). While doing this it stores the
228 	 * original values into the last sg hw list
229 	 * (srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1] and the
230 	 * total_xfer_length in xferred. These values are restored in
231 	 * pci_unmap_srb_sense. This is the only place xferred is used.
232 	 */
233 	size_t xferred;		        /* Saved copy of total_xfer_length */
234 
235 	u16 state;
236 
237 	u8 msgin_buf[6];
238 	u8 msgout_buf[6];
239 
240 	u8 adapter_status;
241 	u8 target_status;
242 	u8 msg_count;
243 	u8 end_message;
244 
245 	u8 tag_number;
246 	u8 status;
247 	u8 retry_count;
248 	u8 flag;
249 
250 	u8 scsi_phase;
251 };
252 
253 struct DeviceCtlBlk {
254 	struct list_head list;		/* next/prev ptrs for the dcb list */
255 	struct AdapterCtlBlk *acb;
256 	struct list_head srb_going_list;	/* head of going srb list */
257 	struct list_head srb_waiting_list;	/* head of waiting srb list */
258 
259 	struct ScsiReqBlk *active_srb;
260 	u32 tag_mask;
261 
262 	u16 max_command;
263 
264 	u8 target_id;		/* SCSI Target ID  (SCSI Only) */
265 	u8 target_lun;		/* SCSI Log.  Unit (SCSI Only) */
266 	u8 identify_msg;
267 	u8 dev_mode;
268 
269 	u8 inquiry7;		/* To store Inquiry flags */
270 	u8 sync_mode;		/* 0:async mode */
271 	u8 min_nego_period;	/* for nego. */
272 	u8 sync_period;		/* for reg.  */
273 
274 	u8 sync_offset;		/* for reg. and nego.(low nibble) */
275 	u8 flag;
276 	u8 dev_type;
277 	u8 init_tcq_flag;
278 };
279 
280 struct AdapterCtlBlk {
281 	struct Scsi_Host *scsi_host;
282 
283 	unsigned long io_port_base;
284 	unsigned long io_port_len;
285 
286 	struct list_head dcb_list;		/* head of going dcb list */
287 	struct DeviceCtlBlk *dcb_run_robin;
288 	struct DeviceCtlBlk *active_dcb;
289 
290 	struct list_head srb_free_list;		/* head of free srb list */
291 	struct ScsiReqBlk *tmp_srb;
292 	struct timer_list waiting_timer;
293 	struct timer_list selto_timer;
294 
295 	unsigned long last_reset;
296 
297 	u16 srb_count;
298 
299 	u8 sel_timeout;
300 
301 	unsigned int irq_level;
302 	u8 tag_max_num;
303 	u8 acb_flag;
304 	u8 gmode2;
305 
306 	u8 config;
307 	u8 lun_chk;
308 	u8 scan_devices;
309 	u8 hostid_bit;
310 
311 	u8 dcb_map[DC395x_MAX_SCSI_ID];
312 	struct DeviceCtlBlk *children[DC395x_MAX_SCSI_ID][32];
313 
314 	struct pci_dev *dev;
315 
316 	u8 msg_len;
317 
318 	struct ScsiReqBlk srb_array[DC395x_MAX_SRB_CNT];
319 	struct ScsiReqBlk srb;
320 
321 	struct NvRamType eeprom;	/* eeprom settings for this adapter */
322 };
323 
324 
325 /*---------------------------------------------------------------------------
326                             Forward declarations
327  ---------------------------------------------------------------------------*/
328 static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
329 		u16 *pscsi_status);
330 static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
331 		u16 *pscsi_status);
332 static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
333 		u16 *pscsi_status);
334 static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
335 		u16 *pscsi_status);
336 static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
337 		u16 *pscsi_status);
338 static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
339 		u16 *pscsi_status);
340 static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
341 		u16 *pscsi_status);
342 static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
343 		u16 *pscsi_status);
344 static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
345 		u16 *pscsi_status);
346 static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
347 		u16 *pscsi_status);
348 static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
349 		u16 *pscsi_status);
350 static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
351 		u16 *pscsi_status);
352 static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
353 		u16 *pscsi_status);
354 static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
355 		u16 *pscsi_status);
356 static void set_basic_config(struct AdapterCtlBlk *acb);
357 static void cleanup_after_transfer(struct AdapterCtlBlk *acb,
358 		struct ScsiReqBlk *srb);
359 static void reset_scsi_bus(struct AdapterCtlBlk *acb);
360 static void data_io_transfer(struct AdapterCtlBlk *acb,
361 		struct ScsiReqBlk *srb, u16 io_dir);
362 static void disconnect(struct AdapterCtlBlk *acb);
363 static void reselect(struct AdapterCtlBlk *acb);
364 static u8 start_scsi(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
365 		struct ScsiReqBlk *srb);
366 static inline void enable_msgout_abort(struct AdapterCtlBlk *acb,
367 		struct ScsiReqBlk *srb);
368 static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb,
369 		struct ScsiReqBlk *srb);
370 static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_code,
371 		struct scsi_cmnd *cmd, u8 force);
372 static void scsi_reset_detect(struct AdapterCtlBlk *acb);
373 static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb);
374 static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb,
375 		struct ScsiReqBlk *srb);
376 static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
377 		struct ScsiReqBlk *srb);
378 static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
379 		struct ScsiReqBlk *srb);
380 static void set_xfer_rate(struct AdapterCtlBlk *acb,
381 		struct DeviceCtlBlk *dcb);
382 static void waiting_timeout(struct timer_list *t);
383 
384 
385 /*---------------------------------------------------------------------------
386                                  Static Data
387  ---------------------------------------------------------------------------*/
388 static u16 current_sync_offset = 0;
389 
390 static void *dc395x_scsi_phase0[] = {
391 	data_out_phase0,/* phase:0 */
392 	data_in_phase0,	/* phase:1 */
393 	command_phase0,	/* phase:2 */
394 	status_phase0,	/* phase:3 */
395 	nop0,		/* phase:4 PH_BUS_FREE .. initial phase */
396 	nop0,		/* phase:5 PH_BUS_FREE .. initial phase */
397 	msgout_phase0,	/* phase:6 */
398 	msgin_phase0,	/* phase:7 */
399 };
400 
401 static void *dc395x_scsi_phase1[] = {
402 	data_out_phase1,/* phase:0 */
403 	data_in_phase1,	/* phase:1 */
404 	command_phase1,	/* phase:2 */
405 	status_phase1,	/* phase:3 */
406 	nop1,		/* phase:4 PH_BUS_FREE .. initial phase */
407 	nop1,		/* phase:5 PH_BUS_FREE .. initial phase */
408 	msgout_phase1,	/* phase:6 */
409 	msgin_phase1,	/* phase:7 */
410 };
411 
412 /*
413  *Fast20:	000	 50ns, 20.0 MHz
414  *		001	 75ns, 13.3 MHz
415  *		010	100ns, 10.0 MHz
416  *		011	125ns,  8.0 MHz
417  *		100	150ns,  6.6 MHz
418  *		101	175ns,  5.7 MHz
419  *		110	200ns,  5.0 MHz
420  *		111	250ns,  4.0 MHz
421  *
422  *Fast40(LVDS):	000	 25ns, 40.0 MHz
423  *		001	 50ns, 20.0 MHz
424  *		010	 75ns, 13.3 MHz
425  *		011	100ns, 10.0 MHz
426  *		100	125ns,  8.0 MHz
427  *		101	150ns,  6.6 MHz
428  *		110	175ns,  5.7 MHz
429  *		111	200ns,  5.0 MHz
430  */
431 /*static u8	clock_period[] = {12,19,25,31,37,44,50,62};*/
432 
433 /* real period:48ns,76ns,100ns,124ns,148ns,176ns,200ns,248ns */
434 static u8 clock_period[] = { 12, 18, 25, 31, 37, 43, 50, 62 };
435 static u16 clock_speed[] = { 200, 133, 100, 80, 67, 58, 50, 40 };
436 
437 
438 /*---------------------------------------------------------------------------
439                                 Configuration
440   ---------------------------------------------------------------------------*/
441 /*
442  * Module/boot parameters currently effect *all* instances of the
443  * card in the system.
444  */
445 
446 /*
447  * Command line parameters are stored in a structure below.
448  * These are the index's into the structure for the various
449  * command line options.
450  */
451 #define CFG_ADAPTER_ID		0
452 #define CFG_MAX_SPEED		1
453 #define CFG_DEV_MODE		2
454 #define CFG_ADAPTER_MODE	3
455 #define CFG_TAGS		4
456 #define CFG_RESET_DELAY		5
457 
458 #define CFG_NUM			6	/* number of configuration items */
459 
460 
461 /*
462  * Value used to indicate that a command line override
463  * hasn't been used to modify the value.
464  */
465 #define CFG_PARAM_UNSET -1
466 
467 
468 /*
469  * Hold command line parameters.
470  */
471 struct ParameterData {
472 	int value;		/* value of this setting */
473 	int min;		/* minimum value */
474 	int max;		/* maximum value */
475 	int def;		/* default value */
476 	int safe;		/* safe value */
477 };
478 static struct ParameterData cfg_data[] = {
479 	{ /* adapter id */
480 		CFG_PARAM_UNSET,
481 		0,
482 		15,
483 		7,
484 		7
485 	},
486 	{ /* max speed */
487 		CFG_PARAM_UNSET,
488 		  0,
489 		  7,
490 		  1,	/* 13.3Mhz */
491 		  4,	/*  6.7Hmz */
492 	},
493 	{ /* dev mode */
494 		CFG_PARAM_UNSET,
495 		0,
496 		0x3f,
497 		NTC_DO_PARITY_CHK | NTC_DO_DISCONNECT | NTC_DO_SYNC_NEGO |
498 			NTC_DO_WIDE_NEGO | NTC_DO_TAG_QUEUEING |
499 			NTC_DO_SEND_START,
500 		NTC_DO_PARITY_CHK | NTC_DO_SEND_START
501 	},
502 	{ /* adapter mode */
503 		CFG_PARAM_UNSET,
504 		0,
505 		0x2f,
506 		NAC_SCANLUN |
507 		NAC_GT2DRIVES | NAC_GREATER_1G | NAC_POWERON_SCSI_RESET
508 			/*| NAC_ACTIVE_NEG*/,
509 		NAC_GT2DRIVES | NAC_GREATER_1G | NAC_POWERON_SCSI_RESET | 0x08
510 	},
511 	{ /* tags */
512 		CFG_PARAM_UNSET,
513 		0,
514 		5,
515 		3,	/* 16 tags (??) */
516 		2,
517 	},
518 	{ /* reset delay */
519 		CFG_PARAM_UNSET,
520 		0,
521 		180,
522 		1,	/* 1 second */
523 		10,	/* 10 seconds */
524 	}
525 };
526 
527 
528 /*
529  * Safe settings. If set to zero the BIOS/default values with
530  * command line overrides will be used. If set to 1 then safe and
531  * slow settings will be used.
532  */
533 static bool use_safe_settings = 0;
534 module_param_named(safe, use_safe_settings, bool, 0);
535 MODULE_PARM_DESC(safe, "Use safe and slow settings only. Default: false");
536 
537 
538 module_param_named(adapter_id, cfg_data[CFG_ADAPTER_ID].value, int, 0);
539 MODULE_PARM_DESC(adapter_id, "Adapter SCSI ID. Default 7 (0-15)");
540 
541 module_param_named(max_speed, cfg_data[CFG_MAX_SPEED].value, int, 0);
542 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");
543 
544 module_param_named(dev_mode, cfg_data[CFG_DEV_MODE].value, int, 0);
545 MODULE_PARM_DESC(dev_mode, "Device mode.");
546 
547 module_param_named(adapter_mode, cfg_data[CFG_ADAPTER_MODE].value, int, 0);
548 MODULE_PARM_DESC(adapter_mode, "Adapter mode.");
549 
550 module_param_named(tags, cfg_data[CFG_TAGS].value, int, 0);
551 MODULE_PARM_DESC(tags, "Number of tags (1<<x). Default 3 (0-5)");
552 
553 module_param_named(reset_delay, cfg_data[CFG_RESET_DELAY].value, int, 0);
554 MODULE_PARM_DESC(reset_delay, "Reset delay in seconds. Default 1 (0-180)");
555 
556 
557 /**
558  * set_safe_settings - if the use_safe_settings option is set then
559  * set all values to the safe and slow values.
560  **/
set_safe_settings(void)561 static void set_safe_settings(void)
562 {
563 	if (use_safe_settings)
564 	{
565 		int i;
566 
567 		dprintkl(KERN_INFO, "Using safe settings.\n");
568 		for (i = 0; i < CFG_NUM; i++)
569 		{
570 			cfg_data[i].value = cfg_data[i].safe;
571 		}
572 	}
573 }
574 
575 
576 /**
577  * fix_settings - reset any boot parameters which are out of range
578  * back to the default values.
579  **/
fix_settings(void)580 static void fix_settings(void)
581 {
582 	int i;
583 
584 	dprintkdbg(DBG_1,
585 		"setup: AdapterId=%08x MaxSpeed=%08x DevMode=%08x "
586 		"AdapterMode=%08x Tags=%08x ResetDelay=%08x\n",
587 		cfg_data[CFG_ADAPTER_ID].value,
588 		cfg_data[CFG_MAX_SPEED].value,
589 		cfg_data[CFG_DEV_MODE].value,
590 		cfg_data[CFG_ADAPTER_MODE].value,
591 		cfg_data[CFG_TAGS].value,
592 		cfg_data[CFG_RESET_DELAY].value);
593 	for (i = 0; i < CFG_NUM; i++)
594 	{
595 		if (cfg_data[i].value < cfg_data[i].min
596 		    || cfg_data[i].value > cfg_data[i].max)
597 			cfg_data[i].value = cfg_data[i].def;
598 	}
599 }
600 
601 
602 
603 /*
604  * Mapping from the eeprom delay index value (index into this array)
605  * to the number of actual seconds that the delay should be for.
606  */
607 static char eeprom_index_to_delay_map[] =
608 	{ 1, 3, 5, 10, 16, 30, 60, 120 };
609 
610 
611 /**
612  * eeprom_index_to_delay - Take the eeprom delay setting and convert it
613  * into a number of seconds.
614  *
615  * @eeprom: The eeprom structure in which we find the delay index to map.
616  **/
eeprom_index_to_delay(struct NvRamType * eeprom)617 static void eeprom_index_to_delay(struct NvRamType *eeprom)
618 {
619 	eeprom->delay_time = eeprom_index_to_delay_map[eeprom->delay_time];
620 }
621 
622 
623 /**
624  * delay_to_eeprom_index - Take a delay in seconds and return the
625  * closest eeprom index which will delay for at least that amount of
626  * seconds.
627  *
628  * @delay: The delay, in seconds, to find the eeprom index for.
629  **/
delay_to_eeprom_index(int delay)630 static int delay_to_eeprom_index(int delay)
631 {
632 	u8 idx = 0;
633 	while (idx < 7 && eeprom_index_to_delay_map[idx] < delay)
634 		idx++;
635 	return idx;
636 }
637 
638 
639 /**
640  * eeprom_override - Override the eeprom settings, in the provided
641  * eeprom structure, with values that have been set on the command
642  * line.
643  *
644  * @eeprom: The eeprom data to override with command line options.
645  **/
eeprom_override(struct NvRamType * eeprom)646 static void eeprom_override(struct NvRamType *eeprom)
647 {
648 	u8 id;
649 
650 	/* Adapter Settings */
651 	if (cfg_data[CFG_ADAPTER_ID].value != CFG_PARAM_UNSET)
652 		eeprom->scsi_id = (u8)cfg_data[CFG_ADAPTER_ID].value;
653 
654 	if (cfg_data[CFG_ADAPTER_MODE].value != CFG_PARAM_UNSET)
655 		eeprom->channel_cfg = (u8)cfg_data[CFG_ADAPTER_MODE].value;
656 
657 	if (cfg_data[CFG_RESET_DELAY].value != CFG_PARAM_UNSET)
658 		eeprom->delay_time = delay_to_eeprom_index(
659 					cfg_data[CFG_RESET_DELAY].value);
660 
661 	if (cfg_data[CFG_TAGS].value != CFG_PARAM_UNSET)
662 		eeprom->max_tag = (u8)cfg_data[CFG_TAGS].value;
663 
664 	/* Device Settings */
665 	for (id = 0; id < DC395x_MAX_SCSI_ID; id++) {
666 		if (cfg_data[CFG_DEV_MODE].value != CFG_PARAM_UNSET)
667 			eeprom->target[id].cfg0 =
668 				(u8)cfg_data[CFG_DEV_MODE].value;
669 
670 		if (cfg_data[CFG_MAX_SPEED].value != CFG_PARAM_UNSET)
671 			eeprom->target[id].period =
672 				(u8)cfg_data[CFG_MAX_SPEED].value;
673 
674 	}
675 }
676 
677 
678 /*---------------------------------------------------------------------------
679  ---------------------------------------------------------------------------*/
680 
list_size(struct list_head * head)681 static unsigned int list_size(struct list_head *head)
682 {
683 	unsigned int count = 0;
684 	struct list_head *pos;
685 	list_for_each(pos, head)
686 		count++;
687 	return count;
688 }
689 
690 
dcb_get_next(struct list_head * head,struct DeviceCtlBlk * pos)691 static struct DeviceCtlBlk *dcb_get_next(struct list_head *head,
692 		struct DeviceCtlBlk *pos)
693 {
694 	int use_next = 0;
695 	struct DeviceCtlBlk* next = NULL;
696 	struct DeviceCtlBlk* i;
697 
698 	if (list_empty(head))
699 		return NULL;
700 
701 	/* find supplied dcb and then select the next one */
702 	list_for_each_entry(i, head, list)
703 		if (use_next) {
704 			next = i;
705 			break;
706 		} else if (i == pos) {
707 			use_next = 1;
708 		}
709 	/* if no next one take the head one (ie, wraparound) */
710 	if (!next)
711         	list_for_each_entry(i, head, list) {
712         		next = i;
713         		break;
714         	}
715 
716 	return next;
717 }
718 
719 
free_tag(struct DeviceCtlBlk * dcb,struct ScsiReqBlk * srb)720 static void free_tag(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
721 {
722 	if (srb->tag_number < 255) {
723 		dcb->tag_mask &= ~(1 << srb->tag_number);	/* free tag mask */
724 		srb->tag_number = 255;
725 	}
726 }
727 
728 
729 /* Find cmd in SRB list */
find_cmd(struct scsi_cmnd * cmd,struct list_head * head)730 static inline struct ScsiReqBlk *find_cmd(struct scsi_cmnd *cmd,
731 		struct list_head *head)
732 {
733 	struct ScsiReqBlk *i;
734 	list_for_each_entry(i, head, list)
735 		if (i->cmd == cmd)
736 			return i;
737 	return NULL;
738 }
739 
740 /* Sets the timer to wake us up */
waiting_set_timer(struct AdapterCtlBlk * acb,unsigned long to)741 static void waiting_set_timer(struct AdapterCtlBlk *acb, unsigned long to)
742 {
743 	if (timer_pending(&acb->waiting_timer))
744 		return;
745 	if (time_before(jiffies + to, acb->last_reset - HZ / 2))
746 		acb->waiting_timer.expires =
747 		    acb->last_reset - HZ / 2 + 1;
748 	else
749 		acb->waiting_timer.expires = jiffies + to + 1;
750 	add_timer(&acb->waiting_timer);
751 }
752 
753 
754 /* Send the next command from the waiting list to the bus */
waiting_process_next(struct AdapterCtlBlk * acb)755 static void waiting_process_next(struct AdapterCtlBlk *acb)
756 {
757 	struct DeviceCtlBlk *start = NULL;
758 	struct DeviceCtlBlk *pos;
759 	struct DeviceCtlBlk *dcb;
760 	struct ScsiReqBlk *srb;
761 	struct list_head *dcb_list_head = &acb->dcb_list;
762 
763 	if (acb->active_dcb
764 	    || (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV)))
765 		return;
766 
767 	if (timer_pending(&acb->waiting_timer))
768 		del_timer(&acb->waiting_timer);
769 
770 	if (list_empty(dcb_list_head))
771 		return;
772 
773 	/*
774 	 * Find the starting dcb. Need to find it again in the list
775 	 * since the list may have changed since we set the ptr to it
776 	 */
777 	list_for_each_entry(dcb, dcb_list_head, list)
778 		if (dcb == acb->dcb_run_robin) {
779 			start = dcb;
780 			break;
781 		}
782 	if (!start) {
783 		/* This can happen! */
784 		start = list_entry(dcb_list_head->next, typeof(*start), list);
785 		acb->dcb_run_robin = start;
786 	}
787 
788 
789 	/*
790 	 * Loop over the dcb, but we start somewhere (potentially) in
791 	 * the middle of the loop so we need to manully do this.
792 	 */
793 	pos = start;
794 	do {
795 		struct list_head *waiting_list_head = &pos->srb_waiting_list;
796 
797 		/* Make sure, the next another device gets scheduled ... */
798 		acb->dcb_run_robin = dcb_get_next(dcb_list_head,
799 						  acb->dcb_run_robin);
800 
801 		if (list_empty(waiting_list_head) ||
802 		    pos->max_command <= list_size(&pos->srb_going_list)) {
803 			/* move to next dcb */
804 			pos = dcb_get_next(dcb_list_head, pos);
805 		} else {
806 			srb = list_entry(waiting_list_head->next,
807 					 struct ScsiReqBlk, list);
808 
809 			/* Try to send to the bus */
810 			if (!start_scsi(acb, pos, srb))
811 				list_move(&srb->list, &pos->srb_going_list);
812 			else
813 				waiting_set_timer(acb, HZ/50);
814 			break;
815 		}
816 	} while (pos != start);
817 }
818 
819 
820 /* Wake up waiting queue */
waiting_timeout(struct timer_list * t)821 static void waiting_timeout(struct timer_list *t)
822 {
823 	unsigned long flags;
824 	struct AdapterCtlBlk *acb = from_timer(acb, t, waiting_timer);
825 	dprintkdbg(DBG_1,
826 		"waiting_timeout: Queue woken up by timer. acb=%p\n", acb);
827 	DC395x_LOCK_IO(acb->scsi_host, flags);
828 	waiting_process_next(acb);
829 	DC395x_UNLOCK_IO(acb->scsi_host, flags);
830 }
831 
832 
833 /* Get the DCB for a given ID/LUN combination */
find_dcb(struct AdapterCtlBlk * acb,u8 id,u8 lun)834 static struct DeviceCtlBlk *find_dcb(struct AdapterCtlBlk *acb, u8 id, u8 lun)
835 {
836 	return acb->children[id][lun];
837 }
838 
839 
840 /* Send SCSI Request Block (srb) to adapter (acb) */
send_srb(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb)841 static void send_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
842 {
843 	struct DeviceCtlBlk *dcb = srb->dcb;
844 
845 	if (dcb->max_command <= list_size(&dcb->srb_going_list) ||
846 	    acb->active_dcb ||
847 	    (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV))) {
848 		list_add_tail(&srb->list, &dcb->srb_waiting_list);
849 		waiting_process_next(acb);
850 		return;
851 	}
852 
853 	if (!start_scsi(acb, dcb, srb)) {
854 		list_add_tail(&srb->list, &dcb->srb_going_list);
855 	} else {
856 		list_add(&srb->list, &dcb->srb_waiting_list);
857 		waiting_set_timer(acb, HZ / 50);
858 	}
859 }
860 
861 /* Prepare SRB for being sent to Device DCB w/ command *cmd */
build_srb(struct scsi_cmnd * cmd,struct DeviceCtlBlk * dcb,struct ScsiReqBlk * srb)862 static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb,
863 		struct ScsiReqBlk *srb)
864 {
865 	int nseg;
866 	enum dma_data_direction dir = cmd->sc_data_direction;
867 	dprintkdbg(DBG_0, "build_srb: (0x%p) <%02i-%i>\n",
868 		cmd, dcb->target_id, dcb->target_lun);
869 
870 	srb->dcb = dcb;
871 	srb->cmd = cmd;
872 	srb->sg_count = 0;
873 	srb->total_xfer_length = 0;
874 	srb->sg_bus_addr = 0;
875 	srb->sg_index = 0;
876 	srb->adapter_status = 0;
877 	srb->target_status = 0;
878 	srb->msg_count = 0;
879 	srb->status = 0;
880 	srb->flag = 0;
881 	srb->state = 0;
882 	srb->retry_count = 0;
883 	srb->tag_number = TAG_NONE;
884 	srb->scsi_phase = PH_BUS_FREE;	/* initial phase */
885 	srb->end_message = 0;
886 
887 	nseg = scsi_dma_map(cmd);
888 	BUG_ON(nseg < 0);
889 
890 	if (dir == DMA_NONE || !nseg) {
891 		dprintkdbg(DBG_0,
892 			"build_srb: [0] len=%d buf=%p use_sg=%d !MAP=%08x\n",
893 			   cmd->bufflen, scsi_sglist(cmd), scsi_sg_count(cmd),
894 			   srb->segment_x[0].address);
895 	} else {
896 		int i;
897 		u32 reqlen = scsi_bufflen(cmd);
898 		struct scatterlist *sg;
899 		struct SGentry *sgp = srb->segment_x;
900 
901 		srb->sg_count = nseg;
902 
903 		dprintkdbg(DBG_0,
904 			   "build_srb: [n] len=%d buf=%p use_sg=%d segs=%d\n",
905 			   reqlen, scsi_sglist(cmd), scsi_sg_count(cmd),
906 			   srb->sg_count);
907 
908 		scsi_for_each_sg(cmd, sg, srb->sg_count, i) {
909 			u32 busaddr = (u32)sg_dma_address(sg);
910 			u32 seglen = (u32)sg->length;
911 			sgp[i].address = busaddr;
912 			sgp[i].length = seglen;
913 			srb->total_xfer_length += seglen;
914 		}
915 		sgp += srb->sg_count - 1;
916 
917 		/*
918 		 * adjust last page if too big as it is allocated
919 		 * on even page boundaries
920 		 */
921 		if (srb->total_xfer_length > reqlen) {
922 			sgp->length -= (srb->total_xfer_length - reqlen);
923 			srb->total_xfer_length = reqlen;
924 		}
925 
926 		/* Fixup for WIDE padding - make sure length is even */
927 		if (dcb->sync_period & WIDE_SYNC &&
928 		    srb->total_xfer_length % 2) {
929 			srb->total_xfer_length++;
930 			sgp->length++;
931 		}
932 
933 		srb->sg_bus_addr = dma_map_single(&dcb->acb->dev->dev,
934 				srb->segment_x, SEGMENTX_LEN, DMA_TO_DEVICE);
935 
936 		dprintkdbg(DBG_SG, "build_srb: [n] map sg %p->%08x(%05x)\n",
937 			srb->segment_x, srb->sg_bus_addr, SEGMENTX_LEN);
938 	}
939 
940 	srb->request_length = srb->total_xfer_length;
941 }
942 
943 
944 /**
945  * dc395x_queue_command_lck - queue scsi command passed from the mid
946  * layer, invoke 'done' on completion
947  *
948  * @cmd: pointer to scsi command object
949  *
950  * Returns 1 if the adapter (host) is busy, else returns 0. One
951  * reason for an adapter to be busy is that the number
952  * of outstanding queued commands is already equal to
953  * struct Scsi_Host::can_queue .
954  *
955  * Required: if struct Scsi_Host::can_queue is ever non-zero
956  *           then this function is required.
957  *
958  * Locks: struct Scsi_Host::host_lock held on entry (with "irqsave")
959  *        and is expected to be held on return.
960  *
961  */
dc395x_queue_command_lck(struct scsi_cmnd * cmd)962 static int dc395x_queue_command_lck(struct scsi_cmnd *cmd)
963 {
964 	void (*done)(struct scsi_cmnd *) = scsi_done;
965 	struct DeviceCtlBlk *dcb;
966 	struct ScsiReqBlk *srb;
967 	struct AdapterCtlBlk *acb =
968 	    (struct AdapterCtlBlk *)cmd->device->host->hostdata;
969 	dprintkdbg(DBG_0, "queue_command: (0x%p) <%02i-%i> cmnd=0x%02x\n",
970 		cmd, cmd->device->id, (u8)cmd->device->lun, cmd->cmnd[0]);
971 
972 	/* Assume BAD_TARGET; will be cleared later */
973 	set_host_byte(cmd, DID_BAD_TARGET);
974 
975 	/* ignore invalid targets */
976 	if (cmd->device->id >= acb->scsi_host->max_id ||
977 	    cmd->device->lun >= acb->scsi_host->max_lun ||
978 	    cmd->device->lun >31) {
979 		goto complete;
980 	}
981 
982 	/* does the specified lun on the specified device exist */
983 	if (!(acb->dcb_map[cmd->device->id] & (1 << cmd->device->lun))) {
984 		dprintkl(KERN_INFO, "queue_command: Ignore target <%02i-%i>\n",
985 			cmd->device->id, (u8)cmd->device->lun);
986 		goto complete;
987 	}
988 
989 	/* do we have a DCB for the device */
990 	dcb = find_dcb(acb, cmd->device->id, cmd->device->lun);
991 	if (!dcb) {
992 		/* should never happen */
993 		dprintkl(KERN_ERR, "queue_command: No such device <%02i-%i>",
994 			cmd->device->id, (u8)cmd->device->lun);
995 		goto complete;
996 	}
997 
998 	set_host_byte(cmd, DID_OK);
999 	set_status_byte(cmd, SAM_STAT_GOOD);
1000 
1001 	srb = list_first_entry_or_null(&acb->srb_free_list,
1002 			struct ScsiReqBlk, list);
1003 	if (!srb) {
1004 		/*
1005 		 * Return 1 since we are unable to queue this command at this
1006 		 * point in time.
1007 		 */
1008 		dprintkdbg(DBG_0, "queue_command: No free srb's\n");
1009 		return 1;
1010 	}
1011 	list_del(&srb->list);
1012 
1013 	build_srb(cmd, dcb, srb);
1014 
1015 	if (!list_empty(&dcb->srb_waiting_list)) {
1016 		/* append to waiting queue */
1017 		list_add_tail(&srb->list, &dcb->srb_waiting_list);
1018 		waiting_process_next(acb);
1019 	} else {
1020 		/* process immediately */
1021 		send_srb(acb, srb);
1022 	}
1023 	dprintkdbg(DBG_1, "queue_command: (0x%p) done\n", cmd);
1024 	return 0;
1025 
1026 complete:
1027 	/*
1028 	 * Complete the command immediatey, and then return 0 to
1029 	 * indicate that we have handled the command. This is usually
1030 	 * done when the commad is for things like non existent
1031 	 * devices.
1032 	 */
1033 	done(cmd);
1034 	return 0;
1035 }
1036 
DEF_SCSI_QCMD(dc395x_queue_command)1037 static DEF_SCSI_QCMD(dc395x_queue_command)
1038 
1039 static void dump_register_info(struct AdapterCtlBlk *acb,
1040 		struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
1041 {
1042 	u16 pstat;
1043 	struct pci_dev *dev = acb->dev;
1044 	pci_read_config_word(dev, PCI_STATUS, &pstat);
1045 	if (!dcb)
1046 		dcb = acb->active_dcb;
1047 	if (!srb && dcb)
1048 		srb = dcb->active_srb;
1049 	if (srb) {
1050 		if (!srb->cmd)
1051 			dprintkl(KERN_INFO, "dump: srb=%p cmd=%p OOOPS!\n",
1052 				srb, srb->cmd);
1053 		else
1054 			dprintkl(KERN_INFO, "dump: srb=%p cmd=%p "
1055 				 "cmnd=0x%02x <%02i-%i>\n",
1056 				srb, srb->cmd,
1057 				srb->cmd->cmnd[0], srb->cmd->device->id,
1058 				(u8)srb->cmd->device->lun);
1059 		printk("  sglist=%p cnt=%i idx=%i len=%zu\n",
1060 		       srb->segment_x, srb->sg_count, srb->sg_index,
1061 		       srb->total_xfer_length);
1062 		printk("  state=0x%04x status=0x%02x phase=0x%02x (%sconn.)\n",
1063 		       srb->state, srb->status, srb->scsi_phase,
1064 		       (acb->active_dcb) ? "" : "not");
1065 	}
1066 	dprintkl(KERN_INFO, "dump: SCSI{status=0x%04x fifocnt=0x%02x "
1067 		"signals=0x%02x irqstat=0x%02x sync=0x%02x target=0x%02x "
1068 		"rselid=0x%02x ctr=0x%08x irqen=0x%02x config=0x%04x "
1069 		"config2=0x%02x cmd=0x%02x selto=0x%02x}\n",
1070 		DC395x_read16(acb, TRM_S1040_SCSI_STATUS),
1071 		DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
1072 		DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL),
1073 		DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS),
1074 		DC395x_read8(acb, TRM_S1040_SCSI_SYNC),
1075 		DC395x_read8(acb, TRM_S1040_SCSI_TARGETID),
1076 		DC395x_read8(acb, TRM_S1040_SCSI_IDMSG),
1077 		DC395x_read32(acb, TRM_S1040_SCSI_COUNTER),
1078 		DC395x_read8(acb, TRM_S1040_SCSI_INTEN),
1079 		DC395x_read16(acb, TRM_S1040_SCSI_CONFIG0),
1080 		DC395x_read8(acb, TRM_S1040_SCSI_CONFIG2),
1081 		DC395x_read8(acb, TRM_S1040_SCSI_COMMAND),
1082 		DC395x_read8(acb, TRM_S1040_SCSI_TIMEOUT));
1083 	dprintkl(KERN_INFO, "dump: DMA{cmd=0x%04x fifocnt=0x%02x fstat=0x%02x "
1084 		"irqstat=0x%02x irqen=0x%02x cfg=0x%04x tctr=0x%08x "
1085 		"ctctr=0x%08x addr=0x%08x:0x%08x}\n",
1086 		DC395x_read16(acb, TRM_S1040_DMA_COMMAND),
1087 		DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
1088 		DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
1089 		DC395x_read8(acb, TRM_S1040_DMA_STATUS),
1090 		DC395x_read8(acb, TRM_S1040_DMA_INTEN),
1091 		DC395x_read16(acb, TRM_S1040_DMA_CONFIG),
1092 		DC395x_read32(acb, TRM_S1040_DMA_XCNT),
1093 		DC395x_read32(acb, TRM_S1040_DMA_CXCNT),
1094 		DC395x_read32(acb, TRM_S1040_DMA_XHIGHADDR),
1095 		DC395x_read32(acb, TRM_S1040_DMA_XLOWADDR));
1096 	dprintkl(KERN_INFO, "dump: gen{gctrl=0x%02x gstat=0x%02x gtmr=0x%02x} "
1097 		"pci{status=0x%04x}\n",
1098 		DC395x_read8(acb, TRM_S1040_GEN_CONTROL),
1099 		DC395x_read8(acb, TRM_S1040_GEN_STATUS),
1100 		DC395x_read8(acb, TRM_S1040_GEN_TIMER),
1101 		pstat);
1102 }
1103 
1104 
clear_fifo(struct AdapterCtlBlk * acb,char * txt)1105 static inline void clear_fifo(struct AdapterCtlBlk *acb, char *txt)
1106 {
1107 #if debug_enabled(DBG_FIFO)
1108 	u8 lines = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
1109 	u8 fifocnt = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
1110 	if (!(fifocnt & 0x40))
1111 		dprintkdbg(DBG_FIFO,
1112 			"clear_fifo: (%i bytes) on phase %02x in %s\n",
1113 			fifocnt & 0x3f, lines, txt);
1114 #endif
1115 	DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRFIFO);
1116 }
1117 
1118 
reset_dev_param(struct AdapterCtlBlk * acb)1119 static void reset_dev_param(struct AdapterCtlBlk *acb)
1120 {
1121 	struct DeviceCtlBlk *dcb;
1122 	struct NvRamType *eeprom = &acb->eeprom;
1123 	dprintkdbg(DBG_0, "reset_dev_param: acb=%p\n", acb);
1124 
1125 	list_for_each_entry(dcb, &acb->dcb_list, list) {
1126 		u8 period_index;
1127 
1128 		dcb->sync_mode &= ~(SYNC_NEGO_DONE + WIDE_NEGO_DONE);
1129 		dcb->sync_period = 0;
1130 		dcb->sync_offset = 0;
1131 
1132 		dcb->dev_mode = eeprom->target[dcb->target_id].cfg0;
1133 		period_index = eeprom->target[dcb->target_id].period & 0x07;
1134 		dcb->min_nego_period = clock_period[period_index];
1135 		if (!(dcb->dev_mode & NTC_DO_WIDE_NEGO)
1136 		    || !(acb->config & HCC_WIDE_CARD))
1137 			dcb->sync_mode &= ~WIDE_NEGO_ENABLE;
1138 	}
1139 }
1140 
1141 
1142 /*
1143  * perform a hard reset on the SCSI bus
1144  * @cmd - some command for this host (for fetching hooks)
1145  * Returns: SUCCESS (0x2002) on success, else FAILED (0x2003).
1146  */
__dc395x_eh_bus_reset(struct scsi_cmnd * cmd)1147 static int __dc395x_eh_bus_reset(struct scsi_cmnd *cmd)
1148 {
1149 	struct AdapterCtlBlk *acb =
1150 		(struct AdapterCtlBlk *)cmd->device->host->hostdata;
1151 	dprintkl(KERN_INFO,
1152 		"eh_bus_reset: (0%p) target=<%02i-%i> cmd=%p\n",
1153 		cmd, cmd->device->id, (u8)cmd->device->lun, cmd);
1154 
1155 	if (timer_pending(&acb->waiting_timer))
1156 		del_timer(&acb->waiting_timer);
1157 
1158 	/*
1159 	 * disable interrupt
1160 	 */
1161 	DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00);
1162 	DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00);
1163 	DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
1164 	DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
1165 
1166 	reset_scsi_bus(acb);
1167 	udelay(500);
1168 
1169 	/* We may be in serious trouble. Wait some seconds */
1170 	acb->last_reset =
1171 	    jiffies + 3 * HZ / 2 +
1172 	    HZ * acb->eeprom.delay_time;
1173 
1174 	/*
1175 	 * re-enable interrupt
1176 	 */
1177 	/* Clear SCSI FIFO          */
1178 	DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
1179 	clear_fifo(acb, "eh_bus_reset");
1180 	/* Delete pending IRQ */
1181 	DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
1182 	set_basic_config(acb);
1183 
1184 	reset_dev_param(acb);
1185 	doing_srb_done(acb, DID_RESET, cmd, 0);
1186 	acb->active_dcb = NULL;
1187 	acb->acb_flag = 0;	/* RESET_DETECT, RESET_DONE ,RESET_DEV */
1188 	waiting_process_next(acb);
1189 
1190 	return SUCCESS;
1191 }
1192 
dc395x_eh_bus_reset(struct scsi_cmnd * cmd)1193 static int dc395x_eh_bus_reset(struct scsi_cmnd *cmd)
1194 {
1195 	int rc;
1196 
1197 	spin_lock_irq(cmd->device->host->host_lock);
1198 	rc = __dc395x_eh_bus_reset(cmd);
1199 	spin_unlock_irq(cmd->device->host->host_lock);
1200 
1201 	return rc;
1202 }
1203 
1204 /*
1205  * abort an errant SCSI command
1206  * @cmd - command to be aborted
1207  * Returns: SUCCESS (0x2002) on success, else FAILED (0x2003).
1208  */
dc395x_eh_abort(struct scsi_cmnd * cmd)1209 static int dc395x_eh_abort(struct scsi_cmnd *cmd)
1210 {
1211 	/*
1212 	 * Look into our command queues: If it has not been sent already,
1213 	 * we remove it and return success. Otherwise fail.
1214 	 */
1215 	struct AdapterCtlBlk *acb =
1216 	    (struct AdapterCtlBlk *)cmd->device->host->hostdata;
1217 	struct DeviceCtlBlk *dcb;
1218 	struct ScsiReqBlk *srb;
1219 	dprintkl(KERN_INFO, "eh_abort: (0x%p) target=<%02i-%i> cmd=%p\n",
1220 		cmd, cmd->device->id, (u8)cmd->device->lun, cmd);
1221 
1222 	dcb = find_dcb(acb, cmd->device->id, cmd->device->lun);
1223 	if (!dcb) {
1224 		dprintkl(KERN_DEBUG, "eh_abort: No such device\n");
1225 		return FAILED;
1226 	}
1227 
1228 	srb = find_cmd(cmd, &dcb->srb_waiting_list);
1229 	if (srb) {
1230 		list_del(&srb->list);
1231 		pci_unmap_srb_sense(acb, srb);
1232 		pci_unmap_srb(acb, srb);
1233 		free_tag(dcb, srb);
1234 		list_add_tail(&srb->list, &acb->srb_free_list);
1235 		dprintkl(KERN_DEBUG, "eh_abort: Command was waiting\n");
1236 		set_host_byte(cmd, DID_ABORT);
1237 		return SUCCESS;
1238 	}
1239 	srb = find_cmd(cmd, &dcb->srb_going_list);
1240 	if (srb) {
1241 		dprintkl(KERN_DEBUG, "eh_abort: Command in progress\n");
1242 		/* XXX: Should abort the command here */
1243 	} else {
1244 		dprintkl(KERN_DEBUG, "eh_abort: Command not found\n");
1245 	}
1246 	return FAILED;
1247 }
1248 
1249 
1250 /* SDTR */
build_sdtr(struct AdapterCtlBlk * acb,struct DeviceCtlBlk * dcb,struct ScsiReqBlk * srb)1251 static void build_sdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
1252 		struct ScsiReqBlk *srb)
1253 {
1254 	u8 *ptr = srb->msgout_buf + srb->msg_count;
1255 	if (srb->msg_count > 1) {
1256 		dprintkl(KERN_INFO,
1257 			"build_sdtr: msgout_buf BUSY (%i: %02x %02x)\n",
1258 			srb->msg_count, srb->msgout_buf[0],
1259 			srb->msgout_buf[1]);
1260 		return;
1261 	}
1262 	if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO)) {
1263 		dcb->sync_offset = 0;
1264 		dcb->min_nego_period = 200 >> 2;
1265 	} else if (dcb->sync_offset == 0)
1266 		dcb->sync_offset = SYNC_NEGO_OFFSET;
1267 
1268 	srb->msg_count += spi_populate_sync_msg(ptr, dcb->min_nego_period,
1269 						dcb->sync_offset);
1270 	srb->state |= SRB_DO_SYNC_NEGO;
1271 }
1272 
1273 
1274 /* WDTR */
build_wdtr(struct AdapterCtlBlk * acb,struct DeviceCtlBlk * dcb,struct ScsiReqBlk * srb)1275 static void build_wdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
1276 		struct ScsiReqBlk *srb)
1277 {
1278 	u8 wide = ((dcb->dev_mode & NTC_DO_WIDE_NEGO) &
1279 		   (acb->config & HCC_WIDE_CARD)) ? 1 : 0;
1280 	u8 *ptr = srb->msgout_buf + srb->msg_count;
1281 	if (srb->msg_count > 1) {
1282 		dprintkl(KERN_INFO,
1283 			"build_wdtr: msgout_buf BUSY (%i: %02x %02x)\n",
1284 			srb->msg_count, srb->msgout_buf[0],
1285 			srb->msgout_buf[1]);
1286 		return;
1287 	}
1288 	srb->msg_count += spi_populate_width_msg(ptr, wide);
1289 	srb->state |= SRB_DO_WIDE_NEGO;
1290 }
1291 
1292 
1293 #if 0
1294 /* Timer to work around chip flaw: When selecting and the bus is
1295  * busy, we sometimes miss a Selection timeout IRQ */
1296 void selection_timeout_missed(unsigned long ptr);
1297 /* Sets the timer to wake us up */
1298 static void selto_timer(struct AdapterCtlBlk *acb)
1299 {
1300 	if (timer_pending(&acb->selto_timer))
1301 		return;
1302 	acb->selto_timer.function = selection_timeout_missed;
1303 	acb->selto_timer.data = (unsigned long) acb;
1304 	if (time_before
1305 	    (jiffies + HZ, acb->last_reset + HZ / 2))
1306 		acb->selto_timer.expires =
1307 		    acb->last_reset + HZ / 2 + 1;
1308 	else
1309 		acb->selto_timer.expires = jiffies + HZ + 1;
1310 	add_timer(&acb->selto_timer);
1311 }
1312 
1313 
1314 void selection_timeout_missed(unsigned long ptr)
1315 {
1316 	unsigned long flags;
1317 	struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)ptr;
1318 	struct ScsiReqBlk *srb;
1319 	dprintkl(KERN_DEBUG, "Chip forgot to produce SelTO IRQ!\n");
1320 	if (!acb->active_dcb || !acb->active_dcb->active_srb) {
1321 		dprintkl(KERN_DEBUG, "... but no cmd pending? Oops!\n");
1322 		return;
1323 	}
1324 	DC395x_LOCK_IO(acb->scsi_host, flags);
1325 	srb = acb->active_dcb->active_srb;
1326 	disconnect(acb);
1327 	DC395x_UNLOCK_IO(acb->scsi_host, flags);
1328 }
1329 #endif
1330 
1331 
start_scsi(struct AdapterCtlBlk * acb,struct DeviceCtlBlk * dcb,struct ScsiReqBlk * srb)1332 static u8 start_scsi(struct AdapterCtlBlk* acb, struct DeviceCtlBlk* dcb,
1333 		struct ScsiReqBlk* srb)
1334 {
1335 	u16 __maybe_unused s_stat2, return_code;
1336 	u8 s_stat, scsicommand, i, identify_message;
1337 	u8 *ptr;
1338 	dprintkdbg(DBG_0, "start_scsi: (0x%p) <%02i-%i> srb=%p\n",
1339 		dcb->target_id, dcb->target_lun, srb);
1340 
1341 	srb->tag_number = TAG_NONE;	/* acb->tag_max_num: had error read in eeprom */
1342 
1343 	s_stat = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
1344 	s_stat2 = 0;
1345 	s_stat2 = DC395x_read16(acb, TRM_S1040_SCSI_STATUS);
1346 #if 1
1347 	if (s_stat & 0x20 /* s_stat2 & 0x02000 */ ) {
1348 		dprintkdbg(DBG_KG, "start_scsi: (0x%p) BUSY %02x %04x\n",
1349 			s_stat, s_stat2);
1350 		/*
1351 		 * Try anyway?
1352 		 *
1353 		 * We could, BUT: Sometimes the TRM_S1040 misses to produce a Selection
1354 		 * Timeout, a Disconnect or a Reselection IRQ, so we would be screwed!
1355 		 * (This is likely to be a bug in the hardware. Obviously, most people
1356 		 *  only have one initiator per SCSI bus.)
1357 		 * Instead let this fail and have the timer make sure the command is
1358 		 * tried again after a short time
1359 		 */
1360 		/*selto_timer (acb); */
1361 		return 1;
1362 	}
1363 #endif
1364 	if (acb->active_dcb) {
1365 		dprintkl(KERN_DEBUG, "start_scsi: (0x%p) Attempt to start a"
1366 			"command while another command (0x%p) is active.",
1367 			srb->cmd,
1368 			acb->active_dcb->active_srb ?
1369 			    acb->active_dcb->active_srb->cmd : NULL);
1370 		return 1;
1371 	}
1372 	if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) {
1373 		dprintkdbg(DBG_KG, "start_scsi: (0x%p) Failed (busy)\n", srb->cmd);
1374 		return 1;
1375 	}
1376 	/* Allow starting of SCSI commands half a second before we allow the mid-level
1377 	 * to queue them again after a reset */
1378 	if (time_before(jiffies, acb->last_reset - HZ / 2)) {
1379 		dprintkdbg(DBG_KG, "start_scsi: Refuse cmds (reset wait)\n");
1380 		return 1;
1381 	}
1382 
1383 	/* Flush FIFO */
1384 	clear_fifo(acb, "start_scsi");
1385 	DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id);
1386 	DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id);
1387 	DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period);
1388 	DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset);
1389 	srb->scsi_phase = PH_BUS_FREE;	/* initial phase */
1390 
1391 	identify_message = dcb->identify_msg;
1392 	/*DC395x_TRM_write8(TRM_S1040_SCSI_IDMSG, identify_message); */
1393 	/* Don't allow disconnection for AUTO_REQSENSE: Cont.All.Cond.! */
1394 	if (srb->flag & AUTO_REQSENSE)
1395 		identify_message &= 0xBF;
1396 
1397 	if (((srb->cmd->cmnd[0] == INQUIRY)
1398 	     || (srb->cmd->cmnd[0] == REQUEST_SENSE)
1399 	     || (srb->flag & AUTO_REQSENSE))
1400 	    && (((dcb->sync_mode & WIDE_NEGO_ENABLE)
1401 		 && !(dcb->sync_mode & WIDE_NEGO_DONE))
1402 		|| ((dcb->sync_mode & SYNC_NEGO_ENABLE)
1403 		    && !(dcb->sync_mode & SYNC_NEGO_DONE)))
1404 	    && (dcb->target_lun == 0)) {
1405 		srb->msgout_buf[0] = identify_message;
1406 		srb->msg_count = 1;
1407 		scsicommand = SCMD_SEL_ATNSTOP;
1408 		srb->state = SRB_MSGOUT;
1409 #ifndef SYNC_FIRST
1410 		if (dcb->sync_mode & WIDE_NEGO_ENABLE
1411 		    && dcb->inquiry7 & SCSI_INQ_WBUS16) {
1412 			build_wdtr(acb, dcb, srb);
1413 			goto no_cmd;
1414 		}
1415 #endif
1416 		if (dcb->sync_mode & SYNC_NEGO_ENABLE
1417 		    && dcb->inquiry7 & SCSI_INQ_SYNC) {
1418 			build_sdtr(acb, dcb, srb);
1419 			goto no_cmd;
1420 		}
1421 		if (dcb->sync_mode & WIDE_NEGO_ENABLE
1422 		    && dcb->inquiry7 & SCSI_INQ_WBUS16) {
1423 			build_wdtr(acb, dcb, srb);
1424 			goto no_cmd;
1425 		}
1426 		srb->msg_count = 0;
1427 	}
1428 	/* Send identify message */
1429 	DC395x_write8(acb, TRM_S1040_SCSI_FIFO, identify_message);
1430 
1431 	scsicommand = SCMD_SEL_ATN;
1432 	srb->state = SRB_START_;
1433 #ifndef DC395x_NO_TAGQ
1434 	if ((dcb->sync_mode & EN_TAG_QUEUEING)
1435 	    && (identify_message & 0xC0)) {
1436 		/* Send Tag message */
1437 		u32 tag_mask = 1;
1438 		u8 tag_number = 0;
1439 		while (tag_mask & dcb->tag_mask
1440 		       && tag_number < dcb->max_command) {
1441 			tag_mask = tag_mask << 1;
1442 			tag_number++;
1443 		}
1444 		if (tag_number >= dcb->max_command) {
1445 			dprintkl(KERN_WARNING, "start_scsi: (0x%p) "
1446 				"Out of tags target=<%02i-%i>)\n",
1447 				srb->cmd, srb->cmd->device->id,
1448 				(u8)srb->cmd->device->lun);
1449 			srb->state = SRB_READY;
1450 			DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
1451 				       DO_HWRESELECT);
1452 			return 1;
1453 		}
1454 		/* Send Tag id */
1455 		DC395x_write8(acb, TRM_S1040_SCSI_FIFO, SIMPLE_QUEUE_TAG);
1456 		DC395x_write8(acb, TRM_S1040_SCSI_FIFO, tag_number);
1457 		dcb->tag_mask |= tag_mask;
1458 		srb->tag_number = tag_number;
1459 		scsicommand = SCMD_SEL_ATN3;
1460 		srb->state = SRB_START_;
1461 	}
1462 #endif
1463 /*polling:*/
1464 	/* Send CDB ..command block ......... */
1465 	dprintkdbg(DBG_KG, "start_scsi: (0x%p) <%02i-%i> cmnd=0x%02x tag=%i\n",
1466 		srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun,
1467 		srb->cmd->cmnd[0], srb->tag_number);
1468 	if (srb->flag & AUTO_REQSENSE) {
1469 		DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE);
1470 		DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5));
1471 		DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1472 		DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1473 		DC395x_write8(acb, TRM_S1040_SCSI_FIFO, SCSI_SENSE_BUFFERSIZE);
1474 		DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1475 	} else {
1476 		ptr = (u8 *)srb->cmd->cmnd;
1477 		for (i = 0; i < srb->cmd->cmd_len; i++)
1478 			DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++);
1479 	}
1480       no_cmd:
1481 	DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
1482 		       DO_HWRESELECT | DO_DATALATCH);
1483 	if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) {
1484 		/*
1485 		 * If start_scsi return 1:
1486 		 * we caught an interrupt (must be reset or reselection ... )
1487 		 * : Let's process it first!
1488 		 */
1489 		dprintkdbg(DBG_0, "start_scsi: (0x%p) <%02i-%i> Failed - busy\n",
1490 			srb->cmd, dcb->target_id, dcb->target_lun);
1491 		srb->state = SRB_READY;
1492 		free_tag(dcb, srb);
1493 		srb->msg_count = 0;
1494 		return_code = 1;
1495 		/* This IRQ should NOT get lost, as we did not acknowledge it */
1496 	} else {
1497 		/*
1498 		 * If start_scsi returns 0:
1499 		 * we know that the SCSI processor is free
1500 		 */
1501 		srb->scsi_phase = PH_BUS_FREE;	/* initial phase */
1502 		dcb->active_srb = srb;
1503 		acb->active_dcb = dcb;
1504 		return_code = 0;
1505 		/* it's important for atn stop */
1506 		DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
1507 			       DO_DATALATCH | DO_HWRESELECT);
1508 		/* SCSI command */
1509 		DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, scsicommand);
1510 	}
1511 	return return_code;
1512 }
1513 
1514 
1515 #define DC395x_ENABLE_MSGOUT \
1516  DC395x_write16 (acb, TRM_S1040_SCSI_CONTROL, DO_SETATN); \
1517  srb->state |= SRB_MSGOUT
1518 
1519 
1520 /* abort command */
enable_msgout_abort(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb)1521 static inline void enable_msgout_abort(struct AdapterCtlBlk *acb,
1522 		struct ScsiReqBlk *srb)
1523 {
1524 	srb->msgout_buf[0] = ABORT;
1525 	srb->msg_count = 1;
1526 	DC395x_ENABLE_MSGOUT;
1527 	srb->state &= ~SRB_MSGIN;
1528 	srb->state |= SRB_MSGOUT;
1529 }
1530 
1531 
1532 /**
1533  * dc395x_handle_interrupt - Handle an interrupt that has been confirmed to
1534  *                           have been triggered for this card.
1535  *
1536  * @acb:	 a pointer to the adpter control block
1537  * @scsi_status: the status return when we checked the card
1538  **/
dc395x_handle_interrupt(struct AdapterCtlBlk * acb,u16 scsi_status)1539 static void dc395x_handle_interrupt(struct AdapterCtlBlk *acb,
1540 		u16 scsi_status)
1541 {
1542 	struct DeviceCtlBlk *dcb;
1543 	struct ScsiReqBlk *srb;
1544 	u16 phase;
1545 	u8 scsi_intstatus;
1546 	unsigned long flags;
1547 	void (*dc395x_statev)(struct AdapterCtlBlk *, struct ScsiReqBlk *,
1548 			      u16 *);
1549 
1550 	DC395x_LOCK_IO(acb->scsi_host, flags);
1551 
1552 	/* This acknowledges the IRQ */
1553 	scsi_intstatus = DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
1554 	if ((scsi_status & 0x2007) == 0x2002)
1555 		dprintkl(KERN_DEBUG,
1556 			"COP after COP completed? %04x\n", scsi_status);
1557 	if (debug_enabled(DBG_KG)) {
1558 		if (scsi_intstatus & INT_SELTIMEOUT)
1559 			dprintkdbg(DBG_KG, "handle_interrupt: Selection timeout\n");
1560 	}
1561 	/*dprintkl(KERN_DEBUG, "handle_interrupt: intstatus = 0x%02x ", scsi_intstatus); */
1562 
1563 	if (timer_pending(&acb->selto_timer))
1564 		del_timer(&acb->selto_timer);
1565 
1566 	if (scsi_intstatus & (INT_SELTIMEOUT | INT_DISCONNECT)) {
1567 		disconnect(acb);	/* bus free interrupt  */
1568 		goto out_unlock;
1569 	}
1570 	if (scsi_intstatus & INT_RESELECTED) {
1571 		reselect(acb);
1572 		goto out_unlock;
1573 	}
1574 	if (scsi_intstatus & INT_SELECT) {
1575 		dprintkl(KERN_INFO, "Host does not support target mode!\n");
1576 		goto out_unlock;
1577 	}
1578 	if (scsi_intstatus & INT_SCSIRESET) {
1579 		scsi_reset_detect(acb);
1580 		goto out_unlock;
1581 	}
1582 	if (scsi_intstatus & (INT_BUSSERVICE | INT_CMDDONE)) {
1583 		dcb = acb->active_dcb;
1584 		if (!dcb) {
1585 			dprintkl(KERN_DEBUG,
1586 				"Oops: BusService (%04x %02x) w/o ActiveDCB!\n",
1587 				scsi_status, scsi_intstatus);
1588 			goto out_unlock;
1589 		}
1590 		srb = dcb->active_srb;
1591 		if (dcb->flag & ABORT_DEV_) {
1592 			dprintkdbg(DBG_0, "MsgOut Abort Device.....\n");
1593 			enable_msgout_abort(acb, srb);
1594 		}
1595 
1596 		/* software sequential machine */
1597 		phase = (u16)srb->scsi_phase;
1598 
1599 		/*
1600 		 * 62037 or 62137
1601 		 * call  dc395x_scsi_phase0[]... "phase entry"
1602 		 * handle every phase before start transfer
1603 		 */
1604 		/* data_out_phase0,	phase:0 */
1605 		/* data_in_phase0,	phase:1 */
1606 		/* command_phase0,	phase:2 */
1607 		/* status_phase0,	phase:3 */
1608 		/* nop0,		phase:4 PH_BUS_FREE .. initial phase */
1609 		/* nop0,		phase:5 PH_BUS_FREE .. initial phase */
1610 		/* msgout_phase0,	phase:6 */
1611 		/* msgin_phase0,	phase:7 */
1612 		dc395x_statev = dc395x_scsi_phase0[phase];
1613 		dc395x_statev(acb, srb, &scsi_status);
1614 
1615 		/*
1616 		 * if there were any exception occurred scsi_status
1617 		 * will be modify to bus free phase new scsi_status
1618 		 * transfer out from ... previous dc395x_statev
1619 		 */
1620 		srb->scsi_phase = scsi_status & PHASEMASK;
1621 		phase = (u16)scsi_status & PHASEMASK;
1622 
1623 		/*
1624 		 * call  dc395x_scsi_phase1[]... "phase entry" handle
1625 		 * every phase to do transfer
1626 		 */
1627 		/* data_out_phase1,	phase:0 */
1628 		/* data_in_phase1,	phase:1 */
1629 		/* command_phase1,	phase:2 */
1630 		/* status_phase1,	phase:3 */
1631 		/* nop1,		phase:4 PH_BUS_FREE .. initial phase */
1632 		/* nop1,		phase:5 PH_BUS_FREE .. initial phase */
1633 		/* msgout_phase1,	phase:6 */
1634 		/* msgin_phase1,	phase:7 */
1635 		dc395x_statev = dc395x_scsi_phase1[phase];
1636 		dc395x_statev(acb, srb, &scsi_status);
1637 	}
1638       out_unlock:
1639 	DC395x_UNLOCK_IO(acb->scsi_host, flags);
1640 }
1641 
1642 
dc395x_interrupt(int irq,void * dev_id)1643 static irqreturn_t dc395x_interrupt(int irq, void *dev_id)
1644 {
1645 	struct AdapterCtlBlk *acb = dev_id;
1646 	u16 scsi_status;
1647 	u8 dma_status;
1648 	irqreturn_t handled = IRQ_NONE;
1649 
1650 	/*
1651 	 * Check for pending interrupt
1652 	 */
1653 	scsi_status = DC395x_read16(acb, TRM_S1040_SCSI_STATUS);
1654 	dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS);
1655 	if (scsi_status & SCSIINTERRUPT) {
1656 		/* interrupt pending - let's process it! */
1657 		dc395x_handle_interrupt(acb, scsi_status);
1658 		handled = IRQ_HANDLED;
1659 	}
1660 	else if (dma_status & 0x20) {
1661 		/* Error from the DMA engine */
1662 		dprintkl(KERN_INFO, "Interrupt from DMA engine: 0x%02x!\n", dma_status);
1663 #if 0
1664 		dprintkl(KERN_INFO, "This means DMA error! Try to handle ...\n");
1665 		if (acb->active_dcb) {
1666 			acb->active_dcb-> flag |= ABORT_DEV_;
1667 			if (acb->active_dcb->active_srb)
1668 				enable_msgout_abort(acb, acb->active_dcb->active_srb);
1669 		}
1670 		DC395x_write8(acb, TRM_S1040_DMA_CONTROL, ABORTXFER | CLRXFIFO);
1671 #else
1672 		dprintkl(KERN_INFO, "Ignoring DMA error (probably a bad thing) ...\n");
1673 		acb = NULL;
1674 #endif
1675 		handled = IRQ_HANDLED;
1676 	}
1677 
1678 	return handled;
1679 }
1680 
1681 
msgout_phase0(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb,u16 * pscsi_status)1682 static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1683 		u16 *pscsi_status)
1684 {
1685 	dprintkdbg(DBG_0, "msgout_phase0: (0x%p)\n", srb->cmd);
1686 	if (srb->state & (SRB_UNEXPECT_RESEL + SRB_ABORT_SENT))
1687 		*pscsi_status = PH_BUS_FREE;	/*.. initial phase */
1688 
1689 	DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);	/* it's important for atn stop */
1690 	srb->state &= ~SRB_MSGOUT;
1691 }
1692 
1693 
msgout_phase1(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb,u16 * pscsi_status)1694 static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1695 		u16 *pscsi_status)
1696 {
1697 	u16 i;
1698 	u8 *ptr;
1699 	dprintkdbg(DBG_0, "msgout_phase1: (0x%p)\n", srb->cmd);
1700 
1701 	clear_fifo(acb, "msgout_phase1");
1702 	if (!(srb->state & SRB_MSGOUT)) {
1703 		srb->state |= SRB_MSGOUT;
1704 		dprintkl(KERN_DEBUG,
1705 			"msgout_phase1: (0x%p) Phase unexpected\n",
1706 			srb->cmd);	/* So what ? */
1707 	}
1708 	if (!srb->msg_count) {
1709 		dprintkdbg(DBG_0, "msgout_phase1: (0x%p) NOP msg\n",
1710 			srb->cmd);
1711 		DC395x_write8(acb, TRM_S1040_SCSI_FIFO, NOP);
1712 		DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
1713 		/* it's important for atn stop */
1714 		DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
1715 		return;
1716 	}
1717 	ptr = (u8 *)srb->msgout_buf;
1718 	for (i = 0; i < srb->msg_count; i++)
1719 		DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++);
1720 	srb->msg_count = 0;
1721 	if (srb->msgout_buf[0] == ABORT_TASK_SET)
1722 		srb->state = SRB_ABORT_SENT;
1723 
1724 	DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
1725 }
1726 
1727 
command_phase0(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb,u16 * pscsi_status)1728 static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1729 		u16 *pscsi_status)
1730 {
1731 	dprintkdbg(DBG_0, "command_phase0: (0x%p)\n", srb->cmd);
1732 	DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
1733 }
1734 
1735 
command_phase1(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb,u16 * pscsi_status)1736 static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1737 		u16 *pscsi_status)
1738 {
1739 	struct DeviceCtlBlk *dcb;
1740 	u8 *ptr;
1741 	u16 i;
1742 	dprintkdbg(DBG_0, "command_phase1: (0x%p)\n", srb->cmd);
1743 
1744 	clear_fifo(acb, "command_phase1");
1745 	DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRATN);
1746 	if (!(srb->flag & AUTO_REQSENSE)) {
1747 		ptr = (u8 *)srb->cmd->cmnd;
1748 		for (i = 0; i < srb->cmd->cmd_len; i++) {
1749 			DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr);
1750 			ptr++;
1751 		}
1752 	} else {
1753 		DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE);
1754 		dcb = acb->active_dcb;
1755 		/* target id */
1756 		DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5));
1757 		DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1758 		DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1759 		DC395x_write8(acb, TRM_S1040_SCSI_FIFO, SCSI_SENSE_BUFFERSIZE);
1760 		DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1761 	}
1762 	srb->state |= SRB_COMMAND;
1763 	/* it's important for atn stop */
1764 	DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
1765 	/* SCSI command */
1766 	DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
1767 }
1768 
1769 
1770 /*
1771  * Verify that the remaining space in the hw sg lists is the same as
1772  * the count of remaining bytes in srb->total_xfer_length
1773  */
sg_verify_length(struct ScsiReqBlk * srb)1774 static void sg_verify_length(struct ScsiReqBlk *srb)
1775 {
1776 	if (debug_enabled(DBG_SG)) {
1777 		unsigned len = 0;
1778 		unsigned idx = srb->sg_index;
1779 		struct SGentry *psge = srb->segment_x + idx;
1780 		for (; idx < srb->sg_count; psge++, idx++)
1781 			len += psge->length;
1782 		if (len != srb->total_xfer_length)
1783 			dprintkdbg(DBG_SG,
1784 			       "Inconsistent SRB S/G lengths (Tot=%i, Count=%i) !!\n",
1785 			       srb->total_xfer_length, len);
1786 	}
1787 }
1788 
1789 
1790 /*
1791  * Compute the next Scatter Gather list index and adjust its length
1792  * and address if necessary
1793  */
sg_update_list(struct ScsiReqBlk * srb,u32 left)1794 static void sg_update_list(struct ScsiReqBlk *srb, u32 left)
1795 {
1796 	u8 idx;
1797 	u32 xferred = srb->total_xfer_length - left; /* bytes transferred */
1798 	struct SGentry *psge = srb->segment_x + srb->sg_index;
1799 
1800 	dprintkdbg(DBG_0,
1801 		"sg_update_list: Transferred %i of %i bytes, %i remain\n",
1802 		xferred, srb->total_xfer_length, left);
1803 	if (xferred == 0) {
1804 		/* nothing to update since we did not transfer any data */
1805 		return;
1806 	}
1807 
1808 	sg_verify_length(srb);
1809 	srb->total_xfer_length = left;	/* update remaining count */
1810 	for (idx = srb->sg_index; idx < srb->sg_count; idx++) {
1811 		if (xferred >= psge->length) {
1812 			/* Complete SG entries done */
1813 			xferred -= psge->length;
1814 		} else {
1815 			/* Partial SG entry done */
1816 			dma_sync_single_for_cpu(&srb->dcb->acb->dev->dev,
1817 					srb->sg_bus_addr, SEGMENTX_LEN,
1818 					DMA_TO_DEVICE);
1819 			psge->length -= xferred;
1820 			psge->address += xferred;
1821 			srb->sg_index = idx;
1822 			dma_sync_single_for_device(&srb->dcb->acb->dev->dev,
1823 					srb->sg_bus_addr, SEGMENTX_LEN,
1824 					DMA_TO_DEVICE);
1825 			break;
1826 		}
1827 		psge++;
1828 	}
1829 	sg_verify_length(srb);
1830 }
1831 
1832 
1833 /*
1834  * We have transferred a single byte (PIO mode?) and need to update
1835  * the count of bytes remaining (total_xfer_length) and update the sg
1836  * entry to either point to next byte in the current sg entry, or of
1837  * already at the end to point to the start of the next sg entry
1838  */
sg_subtract_one(struct ScsiReqBlk * srb)1839 static void sg_subtract_one(struct ScsiReqBlk *srb)
1840 {
1841 	sg_update_list(srb, srb->total_xfer_length - 1);
1842 }
1843 
1844 
1845 /*
1846  * cleanup_after_transfer
1847  *
1848  * Makes sure, DMA and SCSI engine are empty, after the transfer has finished
1849  * KG: Currently called from  StatusPhase1 ()
1850  * Should probably also be called from other places
1851  * Best might be to call it in DataXXPhase0, if new phase will differ
1852  */
cleanup_after_transfer(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb)1853 static void cleanup_after_transfer(struct AdapterCtlBlk *acb,
1854 		struct ScsiReqBlk *srb)
1855 {
1856 	/*DC395x_write8 (TRM_S1040_DMA_STATUS, FORCEDMACOMP); */
1857 	if (DC395x_read16(acb, TRM_S1040_DMA_COMMAND) & 0x0001) {	/* read */
1858 		if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40))
1859 			clear_fifo(acb, "cleanup/in");
1860 		if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80))
1861 			DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
1862 	} else {		/* write */
1863 		if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80))
1864 			DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
1865 		if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40))
1866 			clear_fifo(acb, "cleanup/out");
1867 	}
1868 	DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
1869 }
1870 
1871 
1872 /*
1873  * Those no of bytes will be transferred w/ PIO through the SCSI FIFO
1874  * Seems to be needed for unknown reasons; could be a hardware bug :-(
1875  */
1876 #define DC395x_LASTPIO 4
1877 
1878 
data_out_phase0(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb,u16 * pscsi_status)1879 static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1880 		u16 *pscsi_status)
1881 {
1882 	struct DeviceCtlBlk *dcb = srb->dcb;
1883 	u16 scsi_status = *pscsi_status;
1884 	u32 d_left_counter = 0;
1885 	dprintkdbg(DBG_0, "data_out_phase0: (0x%p) <%02i-%i>\n",
1886 		srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
1887 
1888 	/*
1889 	 * KG: We need to drain the buffers before we draw any conclusions!
1890 	 * This means telling the DMA to push the rest into SCSI, telling
1891 	 * SCSI to push the rest to the bus.
1892 	 * However, the device might have been the one to stop us (phase
1893 	 * change), and the data in transit just needs to be accounted so
1894 	 * it can be retransmitted.)
1895 	 */
1896 	/*
1897 	 * KG: Stop DMA engine pushing more data into the SCSI FIFO
1898 	 * If we need more data, the DMA SG list will be freshly set up, anyway
1899 	 */
1900 	dprintkdbg(DBG_PIO, "data_out_phase0: "
1901 		"DMA{fifocnt=0x%02x fifostat=0x%02x} "
1902 		"SCSI{fifocnt=0x%02x cnt=0x%06x status=0x%04x} total=0x%06x\n",
1903 		DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
1904 		DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
1905 		DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
1906 		DC395x_read32(acb, TRM_S1040_SCSI_COUNTER), scsi_status,
1907 		srb->total_xfer_length);
1908 	DC395x_write8(acb, TRM_S1040_DMA_CONTROL, STOPDMAXFER | CLRXFIFO);
1909 
1910 	if (!(srb->state & SRB_XFERPAD)) {
1911 		if (scsi_status & PARITYERROR)
1912 			srb->status |= PARITY_ERROR;
1913 
1914 		/*
1915 		 * KG: Right, we can't just rely on the SCSI_COUNTER, because this
1916 		 * is the no of bytes it got from the DMA engine not the no it
1917 		 * transferred successfully to the device. (And the difference could
1918 		 * be as much as the FIFO size, I guess ...)
1919 		 */
1920 		if (!(scsi_status & SCSIXFERDONE)) {
1921 			/*
1922 			 * when data transfer from DMA FIFO to SCSI FIFO
1923 			 * if there was some data left in SCSI FIFO
1924 			 */
1925 			d_left_counter =
1926 			    (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) &
1927 				  0x1F);
1928 			if (dcb->sync_period & WIDE_SYNC)
1929 				d_left_counter <<= 1;
1930 
1931 			dprintkdbg(DBG_KG, "data_out_phase0: FIFO contains %i %s\n"
1932 				"SCSI{fifocnt=0x%02x cnt=0x%08x} "
1933 				"DMA{fifocnt=0x%04x cnt=0x%02x ctr=0x%08x}\n",
1934 				DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
1935 				(dcb->sync_period & WIDE_SYNC) ? "words" : "bytes",
1936 				DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
1937 				DC395x_read32(acb, TRM_S1040_SCSI_COUNTER),
1938 				DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
1939 				DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
1940 				DC395x_read32(acb, TRM_S1040_DMA_CXCNT));
1941 		}
1942 		/*
1943 		 * calculate all the residue data that not yet tranfered
1944 		 * SCSI transfer counter + left in SCSI FIFO data
1945 		 *
1946 		 * .....TRM_S1040_SCSI_COUNTER (24bits)
1947 		 * The counter always decrement by one for every SCSI byte transfer.
1948 		 * .....TRM_S1040_SCSI_FIFOCNT ( 5bits)
1949 		 * The counter is SCSI FIFO offset counter (in units of bytes or! words)
1950 		 */
1951 		if (srb->total_xfer_length > DC395x_LASTPIO)
1952 			d_left_counter +=
1953 			    DC395x_read32(acb, TRM_S1040_SCSI_COUNTER);
1954 
1955 		/* Is this a good idea? */
1956 		/*clear_fifo(acb, "DOP1"); */
1957 		/* KG: What is this supposed to be useful for? WIDE padding stuff? */
1958 		if (d_left_counter == 1 && dcb->sync_period & WIDE_SYNC
1959 		    && scsi_bufflen(srb->cmd) % 2) {
1960 			d_left_counter = 0;
1961 			dprintkl(KERN_INFO,
1962 				"data_out_phase0: Discard 1 byte (0x%02x)\n",
1963 				scsi_status);
1964 		}
1965 		/*
1966 		 * KG: Oops again. Same thinko as above: The SCSI might have been
1967 		 * faster than the DMA engine, so that it ran out of data.
1968 		 * In that case, we have to do just nothing!
1969 		 * But: Why the interrupt: No phase change. No XFERCNT_2_ZERO. Or?
1970 		 */
1971 		/*
1972 		 * KG: This is nonsense: We have been WRITING data to the bus
1973 		 * If the SCSI engine has no bytes left, how should the DMA engine?
1974 		 */
1975 		if (d_left_counter == 0) {
1976 			srb->total_xfer_length = 0;
1977 		} else {
1978 			/*
1979 			 * if transfer not yet complete
1980 			 * there were some data residue in SCSI FIFO or
1981 			 * SCSI transfer counter not empty
1982 			 */
1983 			long oldxferred =
1984 			    srb->total_xfer_length - d_left_counter;
1985 			const int diff =
1986 			    (dcb->sync_period & WIDE_SYNC) ? 2 : 1;
1987 			sg_update_list(srb, d_left_counter);
1988 			/* KG: Most ugly hack! Apparently, this works around a chip bug */
1989 			if ((srb->segment_x[srb->sg_index].length ==
1990 			     diff && scsi_sg_count(srb->cmd))
1991 			    || ((oldxferred & ~PAGE_MASK) ==
1992 				(PAGE_SIZE - diff))
1993 			    ) {
1994 				dprintkl(KERN_INFO, "data_out_phase0: "
1995 					"Work around chip bug (%i)?\n", diff);
1996 				d_left_counter =
1997 				    srb->total_xfer_length - diff;
1998 				sg_update_list(srb, d_left_counter);
1999 				/*srb->total_xfer_length -= diff; */
2000 				/*srb->virt_addr += diff; */
2001 				/*if (srb->cmd->use_sg) */
2002 				/*      srb->sg_index++; */
2003 			}
2004 		}
2005 	}
2006 	if ((*pscsi_status & PHASEMASK) != PH_DATA_OUT) {
2007 		cleanup_after_transfer(acb, srb);
2008 	}
2009 }
2010 
2011 
data_out_phase1(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb,u16 * pscsi_status)2012 static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2013 		u16 *pscsi_status)
2014 {
2015 	dprintkdbg(DBG_0, "data_out_phase1: (0x%p) <%02i-%i>\n",
2016 		srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
2017 	clear_fifo(acb, "data_out_phase1");
2018 	/* do prepare before transfer when data out phase */
2019 	data_io_transfer(acb, srb, XFERDATAOUT);
2020 }
2021 
data_in_phase0(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb,u16 * pscsi_status)2022 static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2023 		u16 *pscsi_status)
2024 {
2025 	u16 scsi_status = *pscsi_status;
2026 
2027 	dprintkdbg(DBG_0, "data_in_phase0: (0x%p) <%02i-%i>\n",
2028 		srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
2029 
2030 	/*
2031 	 * KG: DataIn is much more tricky than DataOut. When the device is finished
2032 	 * and switches to another phase, the SCSI engine should be finished too.
2033 	 * But: There might still be bytes left in its FIFO to be fetched by the DMA
2034 	 * engine and transferred to memory.
2035 	 * We should wait for the FIFOs to be emptied by that (is there any way to
2036 	 * enforce this?) and then stop the DMA engine, because it might think, that
2037 	 * there are more bytes to follow. Yes, the device might disconnect prior to
2038 	 * having all bytes transferred!
2039 	 * Also we should make sure that all data from the DMA engine buffer's really
2040 	 * made its way to the system memory! Some documentation on this would not
2041 	 * seem to be a bad idea, actually.
2042 	 */
2043 	if (!(srb->state & SRB_XFERPAD)) {
2044 		u32 d_left_counter;
2045 		unsigned int sc, fc;
2046 
2047 		if (scsi_status & PARITYERROR) {
2048 			dprintkl(KERN_INFO, "data_in_phase0: (0x%p) "
2049 				"Parity Error\n", srb->cmd);
2050 			srb->status |= PARITY_ERROR;
2051 		}
2052 		/*
2053 		 * KG: We should wait for the DMA FIFO to be empty ...
2054 		 * but: it would be better to wait first for the SCSI FIFO and then the
2055 		 * the DMA FIFO to become empty? How do we know, that the device not already
2056 		 * sent data to the FIFO in a MsgIn phase, eg.?
2057 		 */
2058 		if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80)) {
2059 #if 0
2060 			int ctr = 6000000;
2061 			dprintkl(KERN_DEBUG,
2062 				"DIP0: Wait for DMA FIFO to flush ...\n");
2063 			/*DC395x_write8  (TRM_S1040_DMA_CONTROL, STOPDMAXFER); */
2064 			/*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 7); */
2065 			/*DC395x_write8  (TRM_S1040_SCSI_COMMAND, SCMD_DMA_IN); */
2066 			while (!
2067 			       (DC395x_read16(acb, TRM_S1040_DMA_FIFOSTAT) &
2068 				0x80) && --ctr);
2069 			if (ctr < 6000000 - 1)
2070 				dprintkl(KERN_DEBUG
2071 				       "DIP0: Had to wait for DMA ...\n");
2072 			if (!ctr)
2073 				dprintkl(KERN_ERR,
2074 				       "Deadlock in DIP0 waiting for DMA FIFO empty!!\n");
2075 			/*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 0); */
2076 #endif
2077 			dprintkdbg(DBG_KG, "data_in_phase0: "
2078 				"DMA{fifocnt=0x%02x fifostat=0x%02x}\n",
2079 				DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
2080 				DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT));
2081 		}
2082 		/* Now: Check remainig data: The SCSI counters should tell us ... */
2083 		sc = DC395x_read32(acb, TRM_S1040_SCSI_COUNTER);
2084 		fc = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
2085 		d_left_counter = sc + ((fc & 0x1f)
2086 		       << ((srb->dcb->sync_period & WIDE_SYNC) ? 1 :
2087 			   0));
2088 		dprintkdbg(DBG_KG, "data_in_phase0: "
2089 			"SCSI{fifocnt=0x%02x%s ctr=0x%08x} "
2090 			"DMA{fifocnt=0x%02x fifostat=0x%02x ctr=0x%08x} "
2091 			"Remain{totxfer=%i scsi_fifo+ctr=%i}\n",
2092 			fc,
2093 			(srb->dcb->sync_period & WIDE_SYNC) ? "words" : "bytes",
2094 			sc,
2095 			fc,
2096 			DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
2097 			DC395x_read32(acb, TRM_S1040_DMA_CXCNT),
2098 			srb->total_xfer_length, d_left_counter);
2099 #if DC395x_LASTPIO
2100 		/* KG: Less than or equal to 4 bytes can not be transferred via DMA, it seems. */
2101 		if (d_left_counter
2102 		    && srb->total_xfer_length <= DC395x_LASTPIO) {
2103 			size_t left_io = srb->total_xfer_length;
2104 
2105 			/*u32 addr = (srb->segment_x[srb->sg_index].address); */
2106 			/*sg_update_list (srb, d_left_counter); */
2107 			dprintkdbg(DBG_PIO, "data_in_phase0: PIO (%i %s) "
2108 				   "for remaining %i bytes:",
2109 				fc & 0x1f,
2110 				(srb->dcb->sync_period & WIDE_SYNC) ?
2111 				    "words" : "bytes",
2112 				srb->total_xfer_length);
2113 			if (srb->dcb->sync_period & WIDE_SYNC)
2114 				DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2115 					      CFG2_WIDEFIFO);
2116 			while (left_io) {
2117 				unsigned char *virt, *base = NULL;
2118 				unsigned long flags = 0;
2119 				size_t len = left_io;
2120 				size_t offset = srb->request_length - left_io;
2121 
2122 				local_irq_save(flags);
2123 				/* Assumption: it's inside one page as it's at most 4 bytes and
2124 				   I just assume it's on a 4-byte boundary */
2125 				base = scsi_kmap_atomic_sg(scsi_sglist(srb->cmd),
2126 							   srb->sg_count, &offset, &len);
2127 				virt = base + offset;
2128 
2129 				left_io -= len;
2130 
2131 				while (len) {
2132 					u8 byte;
2133 					byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2134 					*virt++ = byte;
2135 
2136 					if (debug_enabled(DBG_PIO))
2137 						printk(" %02x", byte);
2138 
2139 					d_left_counter--;
2140 					sg_subtract_one(srb);
2141 
2142 					len--;
2143 
2144 					fc = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
2145 
2146 					if (fc == 0x40) {
2147 						left_io = 0;
2148 						break;
2149 					}
2150 				}
2151 
2152 				WARN_ON((fc != 0x40) == !d_left_counter);
2153 
2154 				if (fc == 0x40 && (srb->dcb->sync_period & WIDE_SYNC)) {
2155 					/* Read the last byte ... */
2156 					if (srb->total_xfer_length > 0) {
2157 						u8 byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2158 
2159 						*virt++ = byte;
2160 						srb->total_xfer_length--;
2161 						if (debug_enabled(DBG_PIO))
2162 							printk(" %02x", byte);
2163 					}
2164 
2165 					DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2166 				}
2167 
2168 				scsi_kunmap_atomic_sg(base);
2169 				local_irq_restore(flags);
2170 			}
2171 			/*printk(" %08x", *(u32*)(bus_to_virt (addr))); */
2172 			/*srb->total_xfer_length = 0; */
2173 			if (debug_enabled(DBG_PIO))
2174 				printk("\n");
2175 		}
2176 #endif				/* DC395x_LASTPIO */
2177 
2178 #if 0
2179 		/*
2180 		 * KG: This was in DATAOUT. Does it also belong here?
2181 		 * Nobody seems to know what counter and fifo_cnt count exactly ...
2182 		 */
2183 		if (!(scsi_status & SCSIXFERDONE)) {
2184 			/*
2185 			 * when data transfer from DMA FIFO to SCSI FIFO
2186 			 * if there was some data left in SCSI FIFO
2187 			 */
2188 			d_left_counter =
2189 			    (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) &
2190 				  0x1F);
2191 			if (srb->dcb->sync_period & WIDE_SYNC)
2192 				d_left_counter <<= 1;
2193 			/*
2194 			 * if WIDE scsi SCSI FIFOCNT unit is word !!!
2195 			 * so need to *= 2
2196 			 * KG: Seems to be correct ...
2197 			 */
2198 		}
2199 #endif
2200 		/* KG: This should not be needed any more! */
2201 		if (d_left_counter == 0
2202 		    || (scsi_status & SCSIXFERCNT_2_ZERO)) {
2203 #if 0
2204 			int ctr = 6000000;
2205 			u8 TempDMAstatus;
2206 			do {
2207 				TempDMAstatus =
2208 				    DC395x_read8(acb, TRM_S1040_DMA_STATUS);
2209 			} while (!(TempDMAstatus & DMAXFERCOMP) && --ctr);
2210 			if (!ctr)
2211 				dprintkl(KERN_ERR,
2212 				       "Deadlock in DataInPhase0 waiting for DMA!!\n");
2213 			srb->total_xfer_length = 0;
2214 #endif
2215 			srb->total_xfer_length = d_left_counter;
2216 		} else {	/* phase changed */
2217 			/*
2218 			 * parsing the case:
2219 			 * when a transfer not yet complete
2220 			 * but be disconnected by target
2221 			 * if transfer not yet complete
2222 			 * there were some data residue in SCSI FIFO or
2223 			 * SCSI transfer counter not empty
2224 			 */
2225 			sg_update_list(srb, d_left_counter);
2226 		}
2227 	}
2228 	/* KG: The target may decide to disconnect: Empty FIFO before! */
2229 	if ((*pscsi_status & PHASEMASK) != PH_DATA_IN) {
2230 		cleanup_after_transfer(acb, srb);
2231 	}
2232 }
2233 
2234 
data_in_phase1(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb,u16 * pscsi_status)2235 static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2236 		u16 *pscsi_status)
2237 {
2238 	dprintkdbg(DBG_0, "data_in_phase1: (0x%p) <%02i-%i>\n",
2239 		srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
2240 	data_io_transfer(acb, srb, XFERDATAIN);
2241 }
2242 
2243 
data_io_transfer(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb,u16 io_dir)2244 static void data_io_transfer(struct AdapterCtlBlk *acb,
2245 		struct ScsiReqBlk *srb, u16 io_dir)
2246 {
2247 	struct DeviceCtlBlk *dcb = srb->dcb;
2248 	u8 bval;
2249 	dprintkdbg(DBG_0,
2250 		"data_io_transfer: (0x%p) <%02i-%i> %c len=%i, sg=(%i/%i)\n",
2251 		srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun,
2252 		((io_dir & DMACMD_DIR) ? 'r' : 'w'),
2253 		srb->total_xfer_length, srb->sg_index, srb->sg_count);
2254 	if (srb == acb->tmp_srb)
2255 		dprintkl(KERN_ERR, "data_io_transfer: Using tmp_srb!\n");
2256 	if (srb->sg_index >= srb->sg_count) {
2257 		/* can't happen? out of bounds error */
2258 		return;
2259 	}
2260 
2261 	if (srb->total_xfer_length > DC395x_LASTPIO) {
2262 		u8 dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS);
2263 		/*
2264 		 * KG: What should we do: Use SCSI Cmd 0x90/0x92?
2265 		 * Maybe, even ABORTXFER would be appropriate
2266 		 */
2267 		if (dma_status & XFERPENDING) {
2268 			dprintkl(KERN_DEBUG, "data_io_transfer: Xfer pending! "
2269 				"Expect trouble!\n");
2270 			dump_register_info(acb, dcb, srb);
2271 			DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
2272 		}
2273 		/* clear_fifo(acb, "IO"); */
2274 		/*
2275 		 * load what physical address of Scatter/Gather list table
2276 		 * want to be transfer
2277 		 */
2278 		srb->state |= SRB_DATA_XFER;
2279 		DC395x_write32(acb, TRM_S1040_DMA_XHIGHADDR, 0);
2280 		if (scsi_sg_count(srb->cmd)) {	/* with S/G */
2281 			io_dir |= DMACMD_SG;
2282 			DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR,
2283 				       srb->sg_bus_addr +
2284 				       sizeof(struct SGentry) *
2285 				       srb->sg_index);
2286 			/* load how many bytes in the sg list table */
2287 			DC395x_write32(acb, TRM_S1040_DMA_XCNT,
2288 				       ((u32)(srb->sg_count -
2289 					      srb->sg_index) << 3));
2290 		} else {	/* without S/G */
2291 			io_dir &= ~DMACMD_SG;
2292 			DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR,
2293 				       srb->segment_x[0].address);
2294 			DC395x_write32(acb, TRM_S1040_DMA_XCNT,
2295 				       srb->segment_x[0].length);
2296 		}
2297 		/* load total transfer length (24bits) max value 16Mbyte */
2298 		DC395x_write32(acb, TRM_S1040_SCSI_COUNTER,
2299 			       srb->total_xfer_length);
2300 		DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);	/* it's important for atn stop */
2301 		if (io_dir & DMACMD_DIR) {	/* read */
2302 			DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2303 				      SCMD_DMA_IN);
2304 			DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir);
2305 		} else {
2306 			DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir);
2307 			DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2308 				      SCMD_DMA_OUT);
2309 		}
2310 
2311 	}
2312 #if DC395x_LASTPIO
2313 	else if (srb->total_xfer_length > 0) {	/* The last four bytes: Do PIO */
2314 		/*
2315 		 * load what physical address of Scatter/Gather list table
2316 		 * want to be transfer
2317 		 */
2318 		srb->state |= SRB_DATA_XFER;
2319 		/* load total transfer length (24bits) max value 16Mbyte */
2320 		DC395x_write32(acb, TRM_S1040_SCSI_COUNTER,
2321 			       srb->total_xfer_length);
2322 		DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);	/* it's important for atn stop */
2323 		if (io_dir & DMACMD_DIR) {	/* read */
2324 			DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2325 				      SCMD_FIFO_IN);
2326 		} else {	/* write */
2327 			int ln = srb->total_xfer_length;
2328 			size_t left_io = srb->total_xfer_length;
2329 
2330 			if (srb->dcb->sync_period & WIDE_SYNC)
2331 				DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2332 				     CFG2_WIDEFIFO);
2333 
2334 			while (left_io) {
2335 				unsigned char *virt, *base = NULL;
2336 				unsigned long flags = 0;
2337 				size_t len = left_io;
2338 				size_t offset = srb->request_length - left_io;
2339 
2340 				local_irq_save(flags);
2341 				/* Again, max 4 bytes */
2342 				base = scsi_kmap_atomic_sg(scsi_sglist(srb->cmd),
2343 							   srb->sg_count, &offset, &len);
2344 				virt = base + offset;
2345 
2346 				left_io -= len;
2347 
2348 				while (len--) {
2349 					if (debug_enabled(DBG_PIO))
2350 						printk(" %02x", *virt);
2351 
2352 					DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *virt++);
2353 
2354 					sg_subtract_one(srb);
2355 				}
2356 
2357 				scsi_kunmap_atomic_sg(base);
2358 				local_irq_restore(flags);
2359 			}
2360 			if (srb->dcb->sync_period & WIDE_SYNC) {
2361 				if (ln % 2) {
2362 					DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
2363 					if (debug_enabled(DBG_PIO))
2364 						printk(" |00");
2365 				}
2366 				DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2367 			}
2368 			/*DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, ln); */
2369 			if (debug_enabled(DBG_PIO))
2370 				printk("\n");
2371 			DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2372 					  SCMD_FIFO_OUT);
2373 		}
2374 	}
2375 #endif				/* DC395x_LASTPIO */
2376 	else {		/* xfer pad */
2377 		if (srb->sg_count) {
2378 			srb->adapter_status = H_OVER_UNDER_RUN;
2379 			srb->status |= OVER_RUN;
2380 		}
2381 		/*
2382 		 * KG: despite the fact that we are using 16 bits I/O ops
2383 		 * the SCSI FIFO is only 8 bits according to the docs
2384 		 * (we can set bit 1 in 0x8f to serialize FIFO access ...)
2385 		 */
2386 		if (dcb->sync_period & WIDE_SYNC) {
2387 			DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 2);
2388 			DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2389 				      CFG2_WIDEFIFO);
2390 			if (io_dir & DMACMD_DIR) {
2391 				DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2392 				DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2393 			} else {
2394 				/* Danger, Robinson: If you find KGs
2395 				 * scattered over the wide disk, the driver
2396 				 * or chip is to blame :-( */
2397 				DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K');
2398 				DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'G');
2399 			}
2400 			DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2401 		} else {
2402 			DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1);
2403 			/* Danger, Robinson: If you find a collection of Ks on your disk
2404 			 * something broke :-( */
2405 			if (io_dir & DMACMD_DIR)
2406 				DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2407 			else
2408 				DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K');
2409 		}
2410 		srb->state |= SRB_XFERPAD;
2411 		DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);	/* it's important for atn stop */
2412 		/* SCSI command */
2413 		bval = (io_dir & DMACMD_DIR) ? SCMD_FIFO_IN : SCMD_FIFO_OUT;
2414 		DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, bval);
2415 	}
2416 }
2417 
2418 
status_phase0(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb,u16 * pscsi_status)2419 static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2420 		u16 *pscsi_status)
2421 {
2422 	dprintkdbg(DBG_0, "status_phase0: (0x%p) <%02i-%i>\n",
2423 		srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
2424 	srb->target_status = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2425 	srb->end_message = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);	/* get message */
2426 	srb->state = SRB_COMPLETED;
2427 	*pscsi_status = PH_BUS_FREE;	/*.. initial phase */
2428 	DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);	/* it's important for atn stop */
2429 	DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
2430 }
2431 
2432 
status_phase1(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb,u16 * pscsi_status)2433 static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2434 		u16 *pscsi_status)
2435 {
2436 	dprintkdbg(DBG_0, "status_phase1: (0x%p) <%02i-%i>\n",
2437 		srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
2438 	srb->state = SRB_STATUS;
2439 	DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);	/* it's important for atn stop */
2440 	DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_COMP);
2441 }
2442 
2443 
2444 /* Check if the message is complete */
msgin_completed(u8 * msgbuf,u32 len)2445 static inline u8 msgin_completed(u8 * msgbuf, u32 len)
2446 {
2447 	if (*msgbuf == EXTENDED_MESSAGE) {
2448 		if (len < 2)
2449 			return 0;
2450 		if (len < msgbuf[1] + 2)
2451 			return 0;
2452 	} else if (*msgbuf >= 0x20 && *msgbuf <= 0x2f)	/* two byte messages */
2453 		if (len < 2)
2454 			return 0;
2455 	return 1;
2456 }
2457 
2458 /* reject_msg */
msgin_reject(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb)2459 static inline void msgin_reject(struct AdapterCtlBlk *acb,
2460 		struct ScsiReqBlk *srb)
2461 {
2462 	srb->msgout_buf[0] = MESSAGE_REJECT;
2463 	srb->msg_count = 1;
2464 	DC395x_ENABLE_MSGOUT;
2465 	srb->state &= ~SRB_MSGIN;
2466 	srb->state |= SRB_MSGOUT;
2467 	dprintkl(KERN_INFO, "msgin_reject: 0x%02x <%02i-%i>\n",
2468 		srb->msgin_buf[0],
2469 		srb->dcb->target_id, srb->dcb->target_lun);
2470 }
2471 
2472 
msgin_qtag(struct AdapterCtlBlk * acb,struct DeviceCtlBlk * dcb,u8 tag)2473 static struct ScsiReqBlk *msgin_qtag(struct AdapterCtlBlk *acb,
2474 		struct DeviceCtlBlk *dcb, u8 tag)
2475 {
2476 	struct ScsiReqBlk *srb = NULL;
2477 	struct ScsiReqBlk *i;
2478 	dprintkdbg(DBG_0, "msgin_qtag: (0x%p) tag=%i srb=%p\n",
2479 		   srb->cmd, tag, srb);
2480 
2481 	if (!(dcb->tag_mask & (1 << tag)))
2482 		dprintkl(KERN_DEBUG,
2483 			"msgin_qtag: tag_mask=0x%08x does not reserve tag %i!\n",
2484 			dcb->tag_mask, tag);
2485 
2486 	if (list_empty(&dcb->srb_going_list))
2487 		goto mingx0;
2488 	list_for_each_entry(i, &dcb->srb_going_list, list) {
2489 		if (i->tag_number == tag) {
2490 			srb = i;
2491 			break;
2492 		}
2493 	}
2494 	if (!srb)
2495 		goto mingx0;
2496 
2497 	dprintkdbg(DBG_0, "msgin_qtag: (0x%p) <%02i-%i>\n",
2498 		srb->cmd, srb->dcb->target_id, srb->dcb->target_lun);
2499 	if (dcb->flag & ABORT_DEV_) {
2500 		/*srb->state = SRB_ABORT_SENT; */
2501 		enable_msgout_abort(acb, srb);
2502 	}
2503 
2504 	if (!(srb->state & SRB_DISCONNECT))
2505 		goto mingx0;
2506 
2507 	memcpy(srb->msgin_buf, dcb->active_srb->msgin_buf, acb->msg_len);
2508 	srb->state |= dcb->active_srb->state;
2509 	srb->state |= SRB_DATA_XFER;
2510 	dcb->active_srb = srb;
2511 	/* How can we make the DORS happy? */
2512 	return srb;
2513 
2514       mingx0:
2515 	srb = acb->tmp_srb;
2516 	srb->state = SRB_UNEXPECT_RESEL;
2517 	dcb->active_srb = srb;
2518 	srb->msgout_buf[0] = ABORT_TASK;
2519 	srb->msg_count = 1;
2520 	DC395x_ENABLE_MSGOUT;
2521 	dprintkl(KERN_DEBUG, "msgin_qtag: Unknown tag %i - abort\n", tag);
2522 	return srb;
2523 }
2524 
2525 
reprogram_regs(struct AdapterCtlBlk * acb,struct DeviceCtlBlk * dcb)2526 static inline void reprogram_regs(struct AdapterCtlBlk *acb,
2527 		struct DeviceCtlBlk *dcb)
2528 {
2529 	DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id);
2530 	DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period);
2531 	DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset);
2532 	set_xfer_rate(acb, dcb);
2533 }
2534 
2535 
2536 /* set async transfer mode */
msgin_set_async(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb)2537 static void msgin_set_async(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2538 {
2539 	struct DeviceCtlBlk *dcb = srb->dcb;
2540 	dprintkl(KERN_DEBUG, "msgin_set_async: No sync transfers <%02i-%i>\n",
2541 		dcb->target_id, dcb->target_lun);
2542 
2543 	dcb->sync_mode &= ~(SYNC_NEGO_ENABLE);
2544 	dcb->sync_mode |= SYNC_NEGO_DONE;
2545 	/*dcb->sync_period &= 0; */
2546 	dcb->sync_offset = 0;
2547 	dcb->min_nego_period = 200 >> 2;	/* 200ns <=> 5 MHz */
2548 	srb->state &= ~SRB_DO_SYNC_NEGO;
2549 	reprogram_regs(acb, dcb);
2550 	if ((dcb->sync_mode & WIDE_NEGO_ENABLE)
2551 	    && !(dcb->sync_mode & WIDE_NEGO_DONE)) {
2552 		build_wdtr(acb, dcb, srb);
2553 		DC395x_ENABLE_MSGOUT;
2554 		dprintkdbg(DBG_0, "msgin_set_async(rej): Try WDTR anyway\n");
2555 	}
2556 }
2557 
2558 
2559 /* set sync transfer mode */
msgin_set_sync(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb)2560 static void msgin_set_sync(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2561 {
2562 	struct DeviceCtlBlk *dcb = srb->dcb;
2563 	u8 bval;
2564 	int fact;
2565 	dprintkdbg(DBG_1, "msgin_set_sync: <%02i> Sync: %ins "
2566 		"(%02i.%01i MHz) Offset %i\n",
2567 		dcb->target_id, srb->msgin_buf[3] << 2,
2568 		(250 / srb->msgin_buf[3]),
2569 		((250 % srb->msgin_buf[3]) * 10) / srb->msgin_buf[3],
2570 		srb->msgin_buf[4]);
2571 
2572 	if (srb->msgin_buf[4] > 15)
2573 		srb->msgin_buf[4] = 15;
2574 	if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO))
2575 		dcb->sync_offset = 0;
2576 	else if (dcb->sync_offset == 0)
2577 		dcb->sync_offset = srb->msgin_buf[4];
2578 	if (srb->msgin_buf[4] > dcb->sync_offset)
2579 		srb->msgin_buf[4] = dcb->sync_offset;
2580 	else
2581 		dcb->sync_offset = srb->msgin_buf[4];
2582 	bval = 0;
2583 	while (bval < 7 && (srb->msgin_buf[3] > clock_period[bval]
2584 			    || dcb->min_nego_period >
2585 			    clock_period[bval]))
2586 		bval++;
2587 	if (srb->msgin_buf[3] < clock_period[bval])
2588 		dprintkl(KERN_INFO,
2589 			"msgin_set_sync: Increase sync nego period to %ins\n",
2590 			clock_period[bval] << 2);
2591 	srb->msgin_buf[3] = clock_period[bval];
2592 	dcb->sync_period &= 0xf0;
2593 	dcb->sync_period |= ALT_SYNC | bval;
2594 	dcb->min_nego_period = srb->msgin_buf[3];
2595 
2596 	if (dcb->sync_period & WIDE_SYNC)
2597 		fact = 500;
2598 	else
2599 		fact = 250;
2600 
2601 	dprintkl(KERN_INFO,
2602 		"Target %02i: %s Sync: %ins Offset %i (%02i.%01i MB/s)\n",
2603 		dcb->target_id, (fact == 500) ? "Wide16" : "",
2604 		dcb->min_nego_period << 2, dcb->sync_offset,
2605 		(fact / dcb->min_nego_period),
2606 		((fact % dcb->min_nego_period) * 10 +
2607 		dcb->min_nego_period / 2) / dcb->min_nego_period);
2608 
2609 	if (!(srb->state & SRB_DO_SYNC_NEGO)) {
2610 		/* Reply with corrected SDTR Message */
2611 		dprintkl(KERN_DEBUG, "msgin_set_sync: answer w/%ins %i\n",
2612 			srb->msgin_buf[3] << 2, srb->msgin_buf[4]);
2613 
2614 		memcpy(srb->msgout_buf, srb->msgin_buf, 5);
2615 		srb->msg_count = 5;
2616 		DC395x_ENABLE_MSGOUT;
2617 		dcb->sync_mode |= SYNC_NEGO_DONE;
2618 	} else {
2619 		if ((dcb->sync_mode & WIDE_NEGO_ENABLE)
2620 		    && !(dcb->sync_mode & WIDE_NEGO_DONE)) {
2621 			build_wdtr(acb, dcb, srb);
2622 			DC395x_ENABLE_MSGOUT;
2623 			dprintkdbg(DBG_0, "msgin_set_sync: Also try WDTR\n");
2624 		}
2625 	}
2626 	srb->state &= ~SRB_DO_SYNC_NEGO;
2627 	dcb->sync_mode |= SYNC_NEGO_DONE | SYNC_NEGO_ENABLE;
2628 
2629 	reprogram_regs(acb, dcb);
2630 }
2631 
2632 
msgin_set_nowide(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb)2633 static inline void msgin_set_nowide(struct AdapterCtlBlk *acb,
2634 		struct ScsiReqBlk *srb)
2635 {
2636 	struct DeviceCtlBlk *dcb = srb->dcb;
2637 	dprintkdbg(DBG_1, "msgin_set_nowide: <%02i>\n", dcb->target_id);
2638 
2639 	dcb->sync_period &= ~WIDE_SYNC;
2640 	dcb->sync_mode &= ~(WIDE_NEGO_ENABLE);
2641 	dcb->sync_mode |= WIDE_NEGO_DONE;
2642 	srb->state &= ~SRB_DO_WIDE_NEGO;
2643 	reprogram_regs(acb, dcb);
2644 	if ((dcb->sync_mode & SYNC_NEGO_ENABLE)
2645 	    && !(dcb->sync_mode & SYNC_NEGO_DONE)) {
2646 		build_sdtr(acb, dcb, srb);
2647 		DC395x_ENABLE_MSGOUT;
2648 		dprintkdbg(DBG_0, "msgin_set_nowide: Rejected. Try SDTR anyway\n");
2649 	}
2650 }
2651 
msgin_set_wide(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb)2652 static void msgin_set_wide(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2653 {
2654 	struct DeviceCtlBlk *dcb = srb->dcb;
2655 	u8 wide = (dcb->dev_mode & NTC_DO_WIDE_NEGO
2656 		   && acb->config & HCC_WIDE_CARD) ? 1 : 0;
2657 	dprintkdbg(DBG_1, "msgin_set_wide: <%02i>\n", dcb->target_id);
2658 
2659 	if (srb->msgin_buf[3] > wide)
2660 		srb->msgin_buf[3] = wide;
2661 	/* Completed */
2662 	if (!(srb->state & SRB_DO_WIDE_NEGO)) {
2663 		dprintkl(KERN_DEBUG,
2664 			"msgin_set_wide: Wide nego initiated <%02i>\n",
2665 			dcb->target_id);
2666 		memcpy(srb->msgout_buf, srb->msgin_buf, 4);
2667 		srb->msg_count = 4;
2668 		srb->state |= SRB_DO_WIDE_NEGO;
2669 		DC395x_ENABLE_MSGOUT;
2670 	}
2671 
2672 	dcb->sync_mode |= (WIDE_NEGO_ENABLE | WIDE_NEGO_DONE);
2673 	if (srb->msgin_buf[3] > 0)
2674 		dcb->sync_period |= WIDE_SYNC;
2675 	else
2676 		dcb->sync_period &= ~WIDE_SYNC;
2677 	srb->state &= ~SRB_DO_WIDE_NEGO;
2678 	/*dcb->sync_mode &= ~(WIDE_NEGO_ENABLE+WIDE_NEGO_DONE); */
2679 	dprintkdbg(DBG_1,
2680 		"msgin_set_wide: Wide (%i bit) negotiated <%02i>\n",
2681 		(8 << srb->msgin_buf[3]), dcb->target_id);
2682 	reprogram_regs(acb, dcb);
2683 	if ((dcb->sync_mode & SYNC_NEGO_ENABLE)
2684 	    && !(dcb->sync_mode & SYNC_NEGO_DONE)) {
2685 		build_sdtr(acb, dcb, srb);
2686 		DC395x_ENABLE_MSGOUT;
2687 		dprintkdbg(DBG_0, "msgin_set_wide: Also try SDTR.\n");
2688 	}
2689 }
2690 
2691 
2692 /*
2693  * extended message codes:
2694  *
2695  *	code	description
2696  *
2697  *	02h	Reserved
2698  *	00h	MODIFY DATA  POINTER
2699  *	01h	SYNCHRONOUS DATA TRANSFER REQUEST
2700  *	03h	WIDE DATA TRANSFER REQUEST
2701  *   04h - 7Fh	Reserved
2702  *   80h - FFh	Vendor specific
2703  */
msgin_phase0(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb,u16 * pscsi_status)2704 static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2705 		u16 *pscsi_status)
2706 {
2707 	struct DeviceCtlBlk *dcb = acb->active_dcb;
2708 	dprintkdbg(DBG_0, "msgin_phase0: (0x%p)\n", srb->cmd);
2709 
2710 	srb->msgin_buf[acb->msg_len++] = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2711 	if (msgin_completed(srb->msgin_buf, acb->msg_len)) {
2712 		/* Now eval the msg */
2713 		switch (srb->msgin_buf[0]) {
2714 		case DISCONNECT:
2715 			srb->state = SRB_DISCONNECT;
2716 			break;
2717 
2718 		case SIMPLE_QUEUE_TAG:
2719 		case HEAD_OF_QUEUE_TAG:
2720 		case ORDERED_QUEUE_TAG:
2721 			srb =
2722 			    msgin_qtag(acb, dcb,
2723 					      srb->msgin_buf[1]);
2724 			break;
2725 
2726 		case MESSAGE_REJECT:
2727 			DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
2728 				       DO_CLRATN | DO_DATALATCH);
2729 			/* A sync nego message was rejected ! */
2730 			if (srb->state & SRB_DO_SYNC_NEGO) {
2731 				msgin_set_async(acb, srb);
2732 				break;
2733 			}
2734 			/* A wide nego message was rejected ! */
2735 			if (srb->state & SRB_DO_WIDE_NEGO) {
2736 				msgin_set_nowide(acb, srb);
2737 				break;
2738 			}
2739 			enable_msgout_abort(acb, srb);
2740 			/*srb->state |= SRB_ABORT_SENT */
2741 			break;
2742 
2743 		case EXTENDED_MESSAGE:
2744 			/* SDTR */
2745 			if (srb->msgin_buf[1] == 3
2746 			    && srb->msgin_buf[2] == EXTENDED_SDTR) {
2747 				msgin_set_sync(acb, srb);
2748 				break;
2749 			}
2750 			/* WDTR */
2751 			if (srb->msgin_buf[1] == 2
2752 			    && srb->msgin_buf[2] == EXTENDED_WDTR
2753 			    && srb->msgin_buf[3] <= 2) { /* sanity check ... */
2754 				msgin_set_wide(acb, srb);
2755 				break;
2756 			}
2757 			msgin_reject(acb, srb);
2758 			break;
2759 
2760 		case IGNORE_WIDE_RESIDUE:
2761 			/* Discard  wide residual */
2762 			dprintkdbg(DBG_0, "msgin_phase0: Ignore Wide Residual!\n");
2763 			break;
2764 
2765 		case COMMAND_COMPLETE:
2766 			/* nothing has to be done */
2767 			break;
2768 
2769 		case SAVE_POINTERS:
2770 			/*
2771 			 * SAVE POINTER may be ignored as we have the struct
2772 			 * ScsiReqBlk* associated with the scsi command.
2773 			 */
2774 			dprintkdbg(DBG_0, "msgin_phase0: (0x%p) "
2775 				"SAVE POINTER rem=%i Ignore\n",
2776 				srb->cmd, srb->total_xfer_length);
2777 			break;
2778 
2779 		case RESTORE_POINTERS:
2780 			dprintkdbg(DBG_0, "msgin_phase0: RESTORE POINTER. Ignore\n");
2781 			break;
2782 
2783 		case ABORT:
2784 			dprintkdbg(DBG_0, "msgin_phase0: (0x%p) "
2785 				"<%02i-%i> ABORT msg\n",
2786 				srb->cmd, dcb->target_id,
2787 				dcb->target_lun);
2788 			dcb->flag |= ABORT_DEV_;
2789 			enable_msgout_abort(acb, srb);
2790 			break;
2791 
2792 		default:
2793 			/* reject unknown messages */
2794 			if (srb->msgin_buf[0] & IDENTIFY_BASE) {
2795 				dprintkdbg(DBG_0, "msgin_phase0: Identify msg\n");
2796 				srb->msg_count = 1;
2797 				srb->msgout_buf[0] = dcb->identify_msg;
2798 				DC395x_ENABLE_MSGOUT;
2799 				srb->state |= SRB_MSGOUT;
2800 				/*break; */
2801 			}
2802 			msgin_reject(acb, srb);
2803 		}
2804 
2805 		/* Clear counter and MsgIn state */
2806 		srb->state &= ~SRB_MSGIN;
2807 		acb->msg_len = 0;
2808 	}
2809 	*pscsi_status = PH_BUS_FREE;
2810 	DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);	/* it's important ... you know! */
2811 	DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
2812 }
2813 
2814 
msgin_phase1(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb,u16 * pscsi_status)2815 static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2816 		u16 *pscsi_status)
2817 {
2818 	dprintkdbg(DBG_0, "msgin_phase1: (0x%p)\n", srb->cmd);
2819 	clear_fifo(acb, "msgin_phase1");
2820 	DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1);
2821 	if (!(srb->state & SRB_MSGIN)) {
2822 		srb->state &= ~SRB_DISCONNECT;
2823 		srb->state |= SRB_MSGIN;
2824 	}
2825 	DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);	/* it's important for atn stop */
2826 	/* SCSI command */
2827 	DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_IN);
2828 }
2829 
2830 
nop0(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb,u16 * pscsi_status)2831 static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2832 		u16 *pscsi_status)
2833 {
2834 }
2835 
2836 
nop1(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb,u16 * pscsi_status)2837 static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2838 		u16 *pscsi_status)
2839 {
2840 }
2841 
2842 
set_xfer_rate(struct AdapterCtlBlk * acb,struct DeviceCtlBlk * dcb)2843 static void set_xfer_rate(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb)
2844 {
2845 	struct DeviceCtlBlk *i;
2846 
2847 	/* set all lun device's  period, offset */
2848 	if (dcb->identify_msg & 0x07)
2849 		return;
2850 
2851 	if (acb->scan_devices) {
2852 		current_sync_offset = dcb->sync_offset;
2853 		return;
2854 	}
2855 
2856 	list_for_each_entry(i, &acb->dcb_list, list)
2857 		if (i->target_id == dcb->target_id) {
2858 			i->sync_period = dcb->sync_period;
2859 			i->sync_offset = dcb->sync_offset;
2860 			i->sync_mode = dcb->sync_mode;
2861 			i->min_nego_period = dcb->min_nego_period;
2862 		}
2863 }
2864 
2865 
disconnect(struct AdapterCtlBlk * acb)2866 static void disconnect(struct AdapterCtlBlk *acb)
2867 {
2868 	struct DeviceCtlBlk *dcb = acb->active_dcb;
2869 	struct ScsiReqBlk *srb;
2870 
2871 	if (!dcb) {
2872 		dprintkl(KERN_ERR, "disconnect: No such device\n");
2873 		udelay(500);
2874 		/* Suspend queue for a while */
2875 		acb->last_reset =
2876 		    jiffies + HZ / 2 +
2877 		    HZ * acb->eeprom.delay_time;
2878 		clear_fifo(acb, "disconnectEx");
2879 		DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT);
2880 		return;
2881 	}
2882 	srb = dcb->active_srb;
2883 	acb->active_dcb = NULL;
2884 	dprintkdbg(DBG_0, "disconnect: (0x%p)\n", srb->cmd);
2885 
2886 	srb->scsi_phase = PH_BUS_FREE;	/* initial phase */
2887 	clear_fifo(acb, "disconnect");
2888 	DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT);
2889 	if (srb->state & SRB_UNEXPECT_RESEL) {
2890 		dprintkl(KERN_ERR,
2891 			"disconnect: Unexpected reselection <%02i-%i>\n",
2892 			dcb->target_id, dcb->target_lun);
2893 		srb->state = 0;
2894 		waiting_process_next(acb);
2895 	} else if (srb->state & SRB_ABORT_SENT) {
2896 		dcb->flag &= ~ABORT_DEV_;
2897 		acb->last_reset = jiffies + HZ / 2 + 1;
2898 		dprintkl(KERN_ERR, "disconnect: SRB_ABORT_SENT\n");
2899 		doing_srb_done(acb, DID_ABORT, srb->cmd, 1);
2900 		waiting_process_next(acb);
2901 	} else {
2902 		if ((srb->state & (SRB_START_ + SRB_MSGOUT))
2903 		    || !(srb->
2904 			 state & (SRB_DISCONNECT | SRB_COMPLETED))) {
2905 			/*
2906 			 * Selection time out
2907 			 * SRB_START_ || SRB_MSGOUT || (!SRB_DISCONNECT && !SRB_COMPLETED)
2908 			 */
2909 			/* Unexp. Disc / Sel Timeout */
2910 			if (srb->state != SRB_START_
2911 			    && srb->state != SRB_MSGOUT) {
2912 				srb->state = SRB_READY;
2913 				dprintkl(KERN_DEBUG,
2914 					"disconnect: (0x%p) Unexpected\n",
2915 					srb->cmd);
2916 				srb->target_status = SCSI_STAT_SEL_TIMEOUT;
2917 				goto disc1;
2918 			} else {
2919 				/* Normal selection timeout */
2920 				dprintkdbg(DBG_KG, "disconnect: (0x%p) "
2921 					"<%02i-%i> SelTO\n", srb->cmd,
2922 					dcb->target_id, dcb->target_lun);
2923 				if (srb->retry_count++ > DC395x_MAX_RETRIES
2924 				    || acb->scan_devices) {
2925 					srb->target_status =
2926 					    SCSI_STAT_SEL_TIMEOUT;
2927 					goto disc1;
2928 				}
2929 				free_tag(dcb, srb);
2930 				list_move(&srb->list, &dcb->srb_waiting_list);
2931 				dprintkdbg(DBG_KG,
2932 					"disconnect: (0x%p) Retry\n",
2933 					srb->cmd);
2934 				waiting_set_timer(acb, HZ / 20);
2935 			}
2936 		} else if (srb->state & SRB_DISCONNECT) {
2937 			u8 bval = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
2938 			/*
2939 			 * SRB_DISCONNECT (This is what we expect!)
2940 			 */
2941 			if (bval & 0x40) {
2942 				dprintkdbg(DBG_0, "disconnect: SCSI bus stat "
2943 					" 0x%02x: ACK set! Other controllers?\n",
2944 					bval);
2945 				/* It could come from another initiator, therefore don't do much ! */
2946 			} else
2947 				waiting_process_next(acb);
2948 		} else if (srb->state & SRB_COMPLETED) {
2949 		      disc1:
2950 			/*
2951 			 ** SRB_COMPLETED
2952 			 */
2953 			free_tag(dcb, srb);
2954 			dcb->active_srb = NULL;
2955 			srb->state = SRB_FREE;
2956 			srb_done(acb, dcb, srb);
2957 		}
2958 	}
2959 }
2960 
2961 
reselect(struct AdapterCtlBlk * acb)2962 static void reselect(struct AdapterCtlBlk *acb)
2963 {
2964 	struct DeviceCtlBlk *dcb = acb->active_dcb;
2965 	struct ScsiReqBlk *srb = NULL;
2966 	u16 rsel_tar_lun_id;
2967 	u8 id, lun;
2968 	dprintkdbg(DBG_0, "reselect: acb=%p\n", acb);
2969 
2970 	clear_fifo(acb, "reselect");
2971 	/*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT | DO_DATALATCH); */
2972 	/* Read Reselected Target ID and LUN */
2973 	rsel_tar_lun_id = DC395x_read16(acb, TRM_S1040_SCSI_TARGETID);
2974 	if (dcb) {		/* Arbitration lost but Reselection win */
2975 		srb = dcb->active_srb;
2976 		if (!srb) {
2977 			dprintkl(KERN_DEBUG, "reselect: Arb lost Resel won, "
2978 				"but active_srb == NULL\n");
2979 			DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);	/* it's important for atn stop */
2980 			return;
2981 		}
2982 		/* Why the if ? */
2983 		if (!acb->scan_devices) {
2984 			dprintkdbg(DBG_KG, "reselect: (0x%p) <%02i-%i> "
2985 				"Arb lost but Resel win rsel=%i stat=0x%04x\n",
2986 				srb->cmd, dcb->target_id,
2987 				dcb->target_lun, rsel_tar_lun_id,
2988 				DC395x_read16(acb, TRM_S1040_SCSI_STATUS));
2989 			/*srb->state |= SRB_DISCONNECT; */
2990 
2991 			srb->state = SRB_READY;
2992 			free_tag(dcb, srb);
2993 			list_move(&srb->list, &dcb->srb_waiting_list);
2994 			waiting_set_timer(acb, HZ / 20);
2995 
2996 			/* return; */
2997 		}
2998 	}
2999 	/* Read Reselected Target Id and LUN */
3000 	if (!(rsel_tar_lun_id & (IDENTIFY_BASE << 8)))
3001 		dprintkl(KERN_DEBUG, "reselect: Expects identify msg. "
3002 			"Got %i!\n", rsel_tar_lun_id);
3003 	id = rsel_tar_lun_id & 0xff;
3004 	lun = (rsel_tar_lun_id >> 8) & 7;
3005 	dcb = find_dcb(acb, id, lun);
3006 	if (!dcb) {
3007 		dprintkl(KERN_ERR, "reselect: From non existent device "
3008 			"<%02i-%i>\n", id, lun);
3009 		DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);	/* it's important for atn stop */
3010 		return;
3011 	}
3012 	acb->active_dcb = dcb;
3013 
3014 	if (!(dcb->dev_mode & NTC_DO_DISCONNECT))
3015 		dprintkl(KERN_DEBUG, "reselect: in spite of forbidden "
3016 			"disconnection? <%02i-%i>\n",
3017 			dcb->target_id, dcb->target_lun);
3018 
3019 	if (dcb->sync_mode & EN_TAG_QUEUEING) {
3020 		srb = acb->tmp_srb;
3021 		dcb->active_srb = srb;
3022 	} else {
3023 		/* There can be only one! */
3024 		srb = dcb->active_srb;
3025 		if (!srb || !(srb->state & SRB_DISCONNECT)) {
3026 			/*
3027 			 * abort command
3028 			 */
3029 			dprintkl(KERN_DEBUG,
3030 				"reselect: w/o disconnected cmds <%02i-%i>\n",
3031 				dcb->target_id, dcb->target_lun);
3032 			srb = acb->tmp_srb;
3033 			srb->state = SRB_UNEXPECT_RESEL;
3034 			dcb->active_srb = srb;
3035 			enable_msgout_abort(acb, srb);
3036 		} else {
3037 			if (dcb->flag & ABORT_DEV_) {
3038 				/*srb->state = SRB_ABORT_SENT; */
3039 				enable_msgout_abort(acb, srb);
3040 			} else
3041 				srb->state = SRB_DATA_XFER;
3042 
3043 		}
3044 	}
3045 	srb->scsi_phase = PH_BUS_FREE;	/* initial phase */
3046 
3047 	/* Program HA ID, target ID, period and offset */
3048 	dprintkdbg(DBG_0, "reselect: select <%i>\n", dcb->target_id);
3049 	DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id);	/* host   ID */
3050 	DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id);		/* target ID */
3051 	DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset);		/* offset    */
3052 	DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period);		/* sync period, wide */
3053 	DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);		/* it's important for atn stop */
3054 	/* SCSI command */
3055 	DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
3056 }
3057 
3058 
tagq_blacklist(char * name)3059 static inline u8 tagq_blacklist(char *name)
3060 {
3061 #ifndef DC395x_NO_TAGQ
3062 #if 0
3063 	u8 i;
3064 	for (i = 0; i < BADDEVCNT; i++)
3065 		if (memcmp(name, DC395x_baddevname1[i], 28) == 0)
3066 			return 1;
3067 #endif
3068 	return 0;
3069 #else
3070 	return 1;
3071 #endif
3072 }
3073 
3074 
disc_tagq_set(struct DeviceCtlBlk * dcb,struct ScsiInqData * ptr)3075 static void disc_tagq_set(struct DeviceCtlBlk *dcb, struct ScsiInqData *ptr)
3076 {
3077 	/* Check for SCSI format (ANSI and Response data format) */
3078 	if ((ptr->Vers & 0x07) >= 2 || (ptr->RDF & 0x0F) == 2) {
3079 		if ((ptr->Flags & SCSI_INQ_CMDQUEUE)
3080 		    && (dcb->dev_mode & NTC_DO_TAG_QUEUEING) &&
3081 		    /*(dcb->dev_mode & NTC_DO_DISCONNECT) */
3082 		    /* ((dcb->dev_type == TYPE_DISK)
3083 		       || (dcb->dev_type == TYPE_MOD)) && */
3084 		    !tagq_blacklist(((char *)ptr) + 8)) {
3085 			if (dcb->max_command == 1)
3086 				dcb->max_command =
3087 				    dcb->acb->tag_max_num;
3088 			dcb->sync_mode |= EN_TAG_QUEUEING;
3089 			/*dcb->tag_mask = 0; */
3090 		} else
3091 			dcb->max_command = 1;
3092 	}
3093 }
3094 
3095 
add_dev(struct AdapterCtlBlk * acb,struct DeviceCtlBlk * dcb,struct ScsiInqData * ptr)3096 static void add_dev(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3097 		struct ScsiInqData *ptr)
3098 {
3099 	u8 bval1 = ptr->DevType & SCSI_DEVTYPE;
3100 	dcb->dev_type = bval1;
3101 	/* if (bval1 == TYPE_DISK || bval1 == TYPE_MOD) */
3102 	disc_tagq_set(dcb, ptr);
3103 }
3104 
3105 
3106 /* unmap mapped pci regions from SRB */
pci_unmap_srb(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb)3107 static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
3108 {
3109 	struct scsi_cmnd *cmd = srb->cmd;
3110 	enum dma_data_direction dir = cmd->sc_data_direction;
3111 
3112 	if (scsi_sg_count(cmd) && dir != DMA_NONE) {
3113 		/* unmap DC395x SG list */
3114 		dprintkdbg(DBG_SG, "pci_unmap_srb: list=%08x(%05x)\n",
3115 			srb->sg_bus_addr, SEGMENTX_LEN);
3116 		dma_unmap_single(&acb->dev->dev, srb->sg_bus_addr, SEGMENTX_LEN,
3117 				DMA_TO_DEVICE);
3118 		dprintkdbg(DBG_SG, "pci_unmap_srb: segs=%i buffer=%p\n",
3119 			   scsi_sg_count(cmd), scsi_bufflen(cmd));
3120 		/* unmap the sg segments */
3121 		scsi_dma_unmap(cmd);
3122 	}
3123 }
3124 
3125 
3126 /* unmap mapped pci sense buffer from SRB */
pci_unmap_srb_sense(struct AdapterCtlBlk * acb,struct ScsiReqBlk * srb)3127 static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb,
3128 		struct ScsiReqBlk *srb)
3129 {
3130 	if (!(srb->flag & AUTO_REQSENSE))
3131 		return;
3132 	/* Unmap sense buffer */
3133 	dprintkdbg(DBG_SG, "pci_unmap_srb_sense: buffer=%08x\n",
3134 	       srb->segment_x[0].address);
3135 	dma_unmap_single(&acb->dev->dev, srb->segment_x[0].address,
3136 			 srb->segment_x[0].length, DMA_FROM_DEVICE);
3137 	/* Restore SG stuff */
3138 	srb->total_xfer_length = srb->xferred;
3139 	srb->segment_x[0].address =
3140 	    srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address;
3141 	srb->segment_x[0].length =
3142 	    srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length;
3143 }
3144 
3145 
3146 /*
3147  * Complete execution of a SCSI command
3148  * Signal completion to the generic SCSI driver
3149  */
srb_done(struct AdapterCtlBlk * acb,struct DeviceCtlBlk * dcb,struct ScsiReqBlk * srb)3150 static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3151 		struct ScsiReqBlk *srb)
3152 {
3153 	u8 tempcnt, status;
3154 	struct scsi_cmnd *cmd = srb->cmd;
3155 	enum dma_data_direction dir = cmd->sc_data_direction;
3156 	int ckc_only = 1;
3157 
3158 	dprintkdbg(DBG_1, "srb_done: (0x%p) <%02i-%i>\n", srb->cmd,
3159 		srb->cmd->device->id, (u8)srb->cmd->device->lun);
3160 	dprintkdbg(DBG_SG, "srb_done: srb=%p sg=%i(%i/%i) buf=%p\n",
3161 		   srb, scsi_sg_count(cmd), srb->sg_index, srb->sg_count,
3162 		   scsi_sgtalbe(cmd));
3163 	status = srb->target_status;
3164 	set_host_byte(cmd, DID_OK);
3165 	set_status_byte(cmd, SAM_STAT_GOOD);
3166 	if (srb->flag & AUTO_REQSENSE) {
3167 		dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE1\n");
3168 		pci_unmap_srb_sense(acb, srb);
3169 		/*
3170 		 ** target status..........................
3171 		 */
3172 		srb->flag &= ~AUTO_REQSENSE;
3173 		srb->adapter_status = 0;
3174 		srb->target_status = SAM_STAT_CHECK_CONDITION;
3175 		if (debug_enabled(DBG_1)) {
3176 			switch (cmd->sense_buffer[2] & 0x0f) {
3177 			case NOT_READY:
3178 				dprintkl(KERN_DEBUG,
3179 				     "ReqSense: NOT_READY cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3180 				     cmd->cmnd[0], dcb->target_id,
3181 				     dcb->target_lun, status, acb->scan_devices);
3182 				break;
3183 			case UNIT_ATTENTION:
3184 				dprintkl(KERN_DEBUG,
3185 				     "ReqSense: UNIT_ATTENTION cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3186 				     cmd->cmnd[0], dcb->target_id,
3187 				     dcb->target_lun, status, acb->scan_devices);
3188 				break;
3189 			case ILLEGAL_REQUEST:
3190 				dprintkl(KERN_DEBUG,
3191 				     "ReqSense: ILLEGAL_REQUEST cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3192 				     cmd->cmnd[0], dcb->target_id,
3193 				     dcb->target_lun, status, acb->scan_devices);
3194 				break;
3195 			case MEDIUM_ERROR:
3196 				dprintkl(KERN_DEBUG,
3197 				     "ReqSense: MEDIUM_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3198 				     cmd->cmnd[0], dcb->target_id,
3199 				     dcb->target_lun, status, acb->scan_devices);
3200 				break;
3201 			case HARDWARE_ERROR:
3202 				dprintkl(KERN_DEBUG,
3203 				     "ReqSense: HARDWARE_ERROR 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 			}
3208 			if (cmd->sense_buffer[7] >= 6)
3209 				printk("sense=0x%02x ASC=0x%02x ASCQ=0x%02x "
3210 					"(0x%08x 0x%08x)\n",
3211 					cmd->sense_buffer[2], cmd->sense_buffer[12],
3212 					cmd->sense_buffer[13],
3213 					*((unsigned int *)(cmd->sense_buffer + 3)),
3214 					*((unsigned int *)(cmd->sense_buffer + 8)));
3215 			else
3216 				printk("sense=0x%02x No ASC/ASCQ (0x%08x)\n",
3217 					cmd->sense_buffer[2],
3218 					*((unsigned int *)(cmd->sense_buffer + 3)));
3219 		}
3220 
3221 		if (status == SAM_STAT_CHECK_CONDITION) {
3222 			set_host_byte(cmd, DID_BAD_TARGET);
3223 			goto ckc_e;
3224 		}
3225 		dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE2\n");
3226 
3227 		set_status_byte(cmd, SAM_STAT_CHECK_CONDITION);
3228 
3229 		goto ckc_e;
3230 	}
3231 
3232 /*************************************************************/
3233 	if (status) {
3234 		/*
3235 		 * target status..........................
3236 		 */
3237 		if (status == SAM_STAT_CHECK_CONDITION) {
3238 			request_sense(acb, dcb, srb);
3239 			return;
3240 		} else if (status == SAM_STAT_TASK_SET_FULL) {
3241 			tempcnt = (u8)list_size(&dcb->srb_going_list);
3242 			dprintkl(KERN_INFO, "QUEUE_FULL for dev <%02i-%i> with %i cmnds\n",
3243 			     dcb->target_id, dcb->target_lun, tempcnt);
3244 			if (tempcnt > 1)
3245 				tempcnt--;
3246 			dcb->max_command = tempcnt;
3247 			free_tag(dcb, srb);
3248 			list_move(&srb->list, &dcb->srb_waiting_list);
3249 			waiting_set_timer(acb, HZ / 20);
3250 			srb->adapter_status = 0;
3251 			srb->target_status = 0;
3252 			return;
3253 		} else if (status == SCSI_STAT_SEL_TIMEOUT) {
3254 			srb->adapter_status = H_SEL_TIMEOUT;
3255 			srb->target_status = 0;
3256 			set_host_byte(cmd, DID_NO_CONNECT);
3257 		} else {
3258 			srb->adapter_status = 0;
3259 			set_host_byte(cmd, DID_ERROR);
3260 			set_status_byte(cmd, status);
3261 		}
3262 	} else {
3263 		/*
3264 		 ** process initiator status..........................
3265 		 */
3266 		status = srb->adapter_status;
3267 		if (status & H_OVER_UNDER_RUN) {
3268 			srb->target_status = 0;
3269 			scsi_msg_to_host_byte(cmd, srb->end_message);
3270 		} else if (srb->status & PARITY_ERROR) {
3271 			set_host_byte(cmd, DID_PARITY);
3272 		} else {	/* No error */
3273 
3274 			srb->adapter_status = 0;
3275 			srb->target_status = 0;
3276 		}
3277 	}
3278 
3279 	ckc_only = 0;
3280 /* Check Error Conditions */
3281       ckc_e:
3282 
3283 	pci_unmap_srb(acb, srb);
3284 
3285 	if (cmd->cmnd[0] == INQUIRY) {
3286 		unsigned char *base = NULL;
3287 		struct ScsiInqData *ptr;
3288 		unsigned long flags = 0;
3289 		struct scatterlist* sg = scsi_sglist(cmd);
3290 		size_t offset = 0, len = sizeof(struct ScsiInqData);
3291 
3292 		local_irq_save(flags);
3293 		base = scsi_kmap_atomic_sg(sg, scsi_sg_count(cmd), &offset, &len);
3294 		ptr = (struct ScsiInqData *)(base + offset);
3295 
3296 		if (!ckc_only && get_host_byte(cmd) == DID_OK
3297 		    && cmd->cmnd[2] == 0 && scsi_bufflen(cmd) >= 8
3298 		    && dir != DMA_NONE && ptr && (ptr->Vers & 0x07) >= 2)
3299 			dcb->inquiry7 = ptr->Flags;
3300 
3301 	/*if( srb->cmd->cmnd[0] == INQUIRY && */
3302 	/*  (host_byte(cmd->result) == DID_OK || status_byte(cmd->result) & CHECK_CONDITION) ) */
3303 		if ((get_host_byte(cmd) == DID_OK) ||
3304 		    (get_status_byte(cmd) == SAM_STAT_CHECK_CONDITION)) {
3305 			if (!dcb->init_tcq_flag) {
3306 				add_dev(acb, dcb, ptr);
3307 				dcb->init_tcq_flag = 1;
3308 			}
3309 		}
3310 
3311 		scsi_kunmap_atomic_sg(base);
3312 		local_irq_restore(flags);
3313 	}
3314 
3315 	/* Here is the info for Doug Gilbert's sg3 ... */
3316 	scsi_set_resid(cmd, srb->total_xfer_length);
3317 	if (debug_enabled(DBG_KG)) {
3318 		if (srb->total_xfer_length)
3319 			dprintkdbg(DBG_KG, "srb_done: (0x%p) <%02i-%i> "
3320 				"cmnd=0x%02x Missed %i bytes\n",
3321 				cmd, cmd->device->id, (u8)cmd->device->lun,
3322 				cmd->cmnd[0], srb->total_xfer_length);
3323 	}
3324 
3325 	if (srb != acb->tmp_srb) {
3326 		/* Add to free list */
3327 		dprintkdbg(DBG_0, "srb_done: (0x%p) done result=0x%08x\n",
3328 			   cmd, cmd->result);
3329 		list_move_tail(&srb->list, &acb->srb_free_list);
3330 	} else {
3331 		dprintkl(KERN_ERR, "srb_done: ERROR! Completed cmd with tmp_srb\n");
3332 	}
3333 
3334 	scsi_done(cmd);
3335 	waiting_process_next(acb);
3336 }
3337 
3338 
3339 /* abort all cmds in our queues */
doing_srb_done(struct AdapterCtlBlk * acb,u8 did_flag,struct scsi_cmnd * cmd,u8 force)3340 static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_flag,
3341 		struct scsi_cmnd *cmd, u8 force)
3342 {
3343 	struct DeviceCtlBlk *dcb;
3344 	dprintkl(KERN_INFO, "doing_srb_done: pids ");
3345 
3346 	list_for_each_entry(dcb, &acb->dcb_list, list) {
3347 		struct ScsiReqBlk *srb;
3348 		struct ScsiReqBlk *tmp;
3349 		struct scsi_cmnd *p;
3350 
3351 		list_for_each_entry_safe(srb, tmp, &dcb->srb_going_list, list) {
3352 			p = srb->cmd;
3353 			printk("G:%p(%02i-%i) ", p,
3354 			       p->device->id, (u8)p->device->lun);
3355 			list_del(&srb->list);
3356 			free_tag(dcb, srb);
3357 			list_add_tail(&srb->list, &acb->srb_free_list);
3358 			set_host_byte(p, did_flag);
3359 			set_status_byte(p, SAM_STAT_GOOD);
3360 			pci_unmap_srb_sense(acb, srb);
3361 			pci_unmap_srb(acb, srb);
3362 			if (force) {
3363 				/* For new EH, we normally don't need to give commands back,
3364 				 * as they all complete or all time out */
3365 				scsi_done(p);
3366 			}
3367 		}
3368 		if (!list_empty(&dcb->srb_going_list))
3369 			dprintkl(KERN_DEBUG,
3370 			       "How could the ML send cmnds to the Going queue? <%02i-%i>\n",
3371 			       dcb->target_id, dcb->target_lun);
3372 		if (dcb->tag_mask)
3373 			dprintkl(KERN_DEBUG,
3374 			       "tag_mask for <%02i-%i> should be empty, is %08x!\n",
3375 			       dcb->target_id, dcb->target_lun,
3376 			       dcb->tag_mask);
3377 
3378 		/* Waiting queue */
3379 		list_for_each_entry_safe(srb, tmp, &dcb->srb_waiting_list, list) {
3380 			p = srb->cmd;
3381 
3382 			printk("W:%p<%02i-%i>", p, p->device->id,
3383 			       (u8)p->device->lun);
3384 			list_move_tail(&srb->list, &acb->srb_free_list);
3385 			set_host_byte(p, did_flag);
3386 			set_status_byte(p, SAM_STAT_GOOD);
3387 			pci_unmap_srb_sense(acb, srb);
3388 			pci_unmap_srb(acb, srb);
3389 			if (force) {
3390 				/* For new EH, we normally don't need to give commands back,
3391 				 * as they all complete or all time out */
3392 				scsi_done(cmd);
3393 			}
3394 		}
3395 		if (!list_empty(&dcb->srb_waiting_list))
3396 			dprintkl(KERN_DEBUG, "ML queued %i cmnds again to <%02i-%i>\n",
3397 			     list_size(&dcb->srb_waiting_list), dcb->target_id,
3398 			     dcb->target_lun);
3399 		dcb->flag &= ~ABORT_DEV_;
3400 	}
3401 	printk("\n");
3402 }
3403 
3404 
reset_scsi_bus(struct AdapterCtlBlk * acb)3405 static void reset_scsi_bus(struct AdapterCtlBlk *acb)
3406 {
3407 	dprintkdbg(DBG_0, "reset_scsi_bus: acb=%p\n", acb);
3408 	acb->acb_flag |= RESET_DEV;	/* RESET_DETECT, RESET_DONE, RESET_DEV */
3409 	DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI);
3410 
3411 	while (!(DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET))
3412 		/* nothing */;
3413 }
3414 
3415 
set_basic_config(struct AdapterCtlBlk * acb)3416 static void set_basic_config(struct AdapterCtlBlk *acb)
3417 {
3418 	u8 bval;
3419 	u16 wval;
3420 	DC395x_write8(acb, TRM_S1040_SCSI_TIMEOUT, acb->sel_timeout);
3421 	if (acb->config & HCC_PARITY)
3422 		bval = PHASELATCH | INITIATOR | BLOCKRST | PARITYCHECK;
3423 	else
3424 		bval = PHASELATCH | INITIATOR | BLOCKRST;
3425 
3426 	DC395x_write8(acb, TRM_S1040_SCSI_CONFIG0, bval);
3427 
3428 	/* program configuration 1: Act_Neg (+ Act_Neg_Enh? + Fast_Filter? + DataDis?) */
3429 	DC395x_write8(acb, TRM_S1040_SCSI_CONFIG1, 0x03);	/* was 0x13: default */
3430 	/* program Host ID                  */
3431 	DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id);
3432 	/* set ansynchronous transfer       */
3433 	DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, 0x00);
3434 	/* Turn LED control off */
3435 	wval = DC395x_read16(acb, TRM_S1040_GEN_CONTROL) & 0x7F;
3436 	DC395x_write16(acb, TRM_S1040_GEN_CONTROL, wval);
3437 	/* DMA config          */
3438 	wval = DC395x_read16(acb, TRM_S1040_DMA_CONFIG) & ~DMA_FIFO_CTRL;
3439 	wval |=
3440 	    DMA_FIFO_HALF_HALF | DMA_ENHANCE /*| DMA_MEM_MULTI_READ */ ;
3441 	DC395x_write16(acb, TRM_S1040_DMA_CONFIG, wval);
3442 	/* Clear pending interrupt status */
3443 	DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
3444 	/* Enable SCSI interrupt    */
3445 	DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x7F);
3446 	DC395x_write8(acb, TRM_S1040_DMA_INTEN, EN_SCSIINTR | EN_DMAXFERERROR
3447 		      /*| EN_DMAXFERABORT | EN_DMAXFERCOMP | EN_FORCEDMACOMP */
3448 		      );
3449 }
3450 
3451 
scsi_reset_detect(struct AdapterCtlBlk * acb)3452 static void scsi_reset_detect(struct AdapterCtlBlk *acb)
3453 {
3454 	dprintkl(KERN_INFO, "scsi_reset_detect: acb=%p\n", acb);
3455 	/* delay half a second */
3456 	if (timer_pending(&acb->waiting_timer))
3457 		del_timer(&acb->waiting_timer);
3458 
3459 	DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
3460 	DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
3461 	/*DC395x_write8(acb, TRM_S1040_DMA_CONTROL,STOPDMAXFER); */
3462 	udelay(500);
3463 	/* Maybe we locked up the bus? Then lets wait even longer ... */
3464 	acb->last_reset =
3465 	    jiffies + 5 * HZ / 2 +
3466 	    HZ * acb->eeprom.delay_time;
3467 
3468 	clear_fifo(acb, "scsi_reset_detect");
3469 	set_basic_config(acb);
3470 	/*1.25 */
3471 	/*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT); */
3472 
3473 	if (acb->acb_flag & RESET_DEV) {	/* RESET_DETECT, RESET_DONE, RESET_DEV */
3474 		acb->acb_flag |= RESET_DONE;
3475 	} else {
3476 		acb->acb_flag |= RESET_DETECT;
3477 		reset_dev_param(acb);
3478 		doing_srb_done(acb, DID_RESET, NULL, 1);
3479 		/*DC395x_RecoverSRB( acb ); */
3480 		acb->active_dcb = NULL;
3481 		acb->acb_flag = 0;
3482 		waiting_process_next(acb);
3483 	}
3484 }
3485 
3486 
request_sense(struct AdapterCtlBlk * acb,struct DeviceCtlBlk * dcb,struct ScsiReqBlk * srb)3487 static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3488 		struct ScsiReqBlk *srb)
3489 {
3490 	struct scsi_cmnd *cmd = srb->cmd;
3491 	dprintkdbg(DBG_1, "request_sense: (0x%p) <%02i-%i>\n",
3492 		cmd, cmd->device->id, (u8)cmd->device->lun);
3493 
3494 	srb->flag |= AUTO_REQSENSE;
3495 	srb->adapter_status = 0;
3496 	srb->target_status = 0;
3497 
3498 	/* KG: Can this prevent crap sense data ? */
3499 	memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
3500 
3501 	/* Save some data */
3502 	srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address =
3503 	    srb->segment_x[0].address;
3504 	srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length =
3505 	    srb->segment_x[0].length;
3506 	srb->xferred = srb->total_xfer_length;
3507 	/* srb->segment_x : a one entry of S/G list table */
3508 	srb->total_xfer_length = SCSI_SENSE_BUFFERSIZE;
3509 	srb->segment_x[0].length = SCSI_SENSE_BUFFERSIZE;
3510 	/* Map sense buffer */
3511 	srb->segment_x[0].address = dma_map_single(&acb->dev->dev,
3512 			cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE,
3513 			DMA_FROM_DEVICE);
3514 	dprintkdbg(DBG_SG, "request_sense: map buffer %p->%08x(%05x)\n",
3515 	       cmd->sense_buffer, srb->segment_x[0].address,
3516 	       SCSI_SENSE_BUFFERSIZE);
3517 	srb->sg_count = 1;
3518 	srb->sg_index = 0;
3519 
3520 	if (start_scsi(acb, dcb, srb)) {	/* Should only happen, if sb. else grabs the bus */
3521 		dprintkl(KERN_DEBUG,
3522 			"request_sense: (0x%p) failed <%02i-%i>\n",
3523 			srb->cmd, dcb->target_id, dcb->target_lun);
3524 		list_move(&srb->list, &dcb->srb_waiting_list);
3525 		waiting_set_timer(acb, HZ / 100);
3526 	}
3527 }
3528 
3529 
3530 /**
3531  * device_alloc - Allocate a new device instance. This create the
3532  * devices instance and sets up all the data items. The adapter
3533  * instance is required to obtain confiuration information for this
3534  * device. This does *not* add this device to the adapters device
3535  * list.
3536  *
3537  * @acb: The adapter to obtain configuration information from.
3538  * @target: The target for the new device.
3539  * @lun: The lun for the new device.
3540  *
3541  * Return the new device if successful or NULL on failure.
3542  **/
device_alloc(struct AdapterCtlBlk * acb,u8 target,u8 lun)3543 static struct DeviceCtlBlk *device_alloc(struct AdapterCtlBlk *acb,
3544 		u8 target, u8 lun)
3545 {
3546 	struct NvRamType *eeprom = &acb->eeprom;
3547 	u8 period_index = eeprom->target[target].period & 0x07;
3548 	struct DeviceCtlBlk *dcb;
3549 
3550 	dcb = kmalloc(sizeof(struct DeviceCtlBlk), GFP_ATOMIC);
3551 	dprintkdbg(DBG_0, "device_alloc: <%02i-%i>\n", target, lun);
3552 	if (!dcb)
3553 		return NULL;
3554 	dcb->acb = NULL;
3555 	INIT_LIST_HEAD(&dcb->srb_going_list);
3556 	INIT_LIST_HEAD(&dcb->srb_waiting_list);
3557 	dcb->active_srb = NULL;
3558 	dcb->tag_mask = 0;
3559 	dcb->max_command = 1;
3560 	dcb->target_id = target;
3561 	dcb->target_lun = lun;
3562 	dcb->dev_mode = eeprom->target[target].cfg0;
3563 #ifndef DC395x_NO_DISCONNECT
3564 	dcb->identify_msg =
3565 	    IDENTIFY(dcb->dev_mode & NTC_DO_DISCONNECT, lun);
3566 #else
3567 	dcb->identify_msg = IDENTIFY(0, lun);
3568 #endif
3569 	dcb->inquiry7 = 0;
3570 	dcb->sync_mode = 0;
3571 	dcb->min_nego_period = clock_period[period_index];
3572 	dcb->sync_period = 0;
3573 	dcb->sync_offset = 0;
3574 	dcb->flag = 0;
3575 
3576 #ifndef DC395x_NO_WIDE
3577 	if ((dcb->dev_mode & NTC_DO_WIDE_NEGO)
3578 	    && (acb->config & HCC_WIDE_CARD))
3579 		dcb->sync_mode |= WIDE_NEGO_ENABLE;
3580 #endif
3581 #ifndef DC395x_NO_SYNC
3582 	if (dcb->dev_mode & NTC_DO_SYNC_NEGO)
3583 		if (!(lun) || current_sync_offset)
3584 			dcb->sync_mode |= SYNC_NEGO_ENABLE;
3585 #endif
3586 	if (dcb->target_lun != 0) {
3587 		/* Copy settings */
3588 		struct DeviceCtlBlk *p = NULL, *iter;
3589 
3590 		list_for_each_entry(iter, &acb->dcb_list, list)
3591 			if (iter->target_id == dcb->target_id) {
3592 				p = iter;
3593 				break;
3594 			}
3595 
3596 		if (!p) {
3597 			kfree(dcb);
3598 			return NULL;
3599 		}
3600 
3601 		dprintkdbg(DBG_1,
3602 		       "device_alloc: <%02i-%i> copy from <%02i-%i>\n",
3603 		       dcb->target_id, dcb->target_lun,
3604 		       p->target_id, p->target_lun);
3605 		dcb->sync_mode = p->sync_mode;
3606 		dcb->sync_period = p->sync_period;
3607 		dcb->min_nego_period = p->min_nego_period;
3608 		dcb->sync_offset = p->sync_offset;
3609 		dcb->inquiry7 = p->inquiry7;
3610 	}
3611 	return dcb;
3612 }
3613 
3614 
3615 /**
3616  * adapter_add_device - Adds the device instance to the adaptor instance.
3617  *
3618  * @acb: The adapter device to be updated
3619  * @dcb: A newly created and initialised device instance to add.
3620  **/
adapter_add_device(struct AdapterCtlBlk * acb,struct DeviceCtlBlk * dcb)3621 static void adapter_add_device(struct AdapterCtlBlk *acb,
3622 		struct DeviceCtlBlk *dcb)
3623 {
3624 	/* backpointer to adapter */
3625 	dcb->acb = acb;
3626 
3627 	/* set run_robin to this device if it is currently empty */
3628 	if (list_empty(&acb->dcb_list))
3629 		acb->dcb_run_robin = dcb;
3630 
3631 	/* add device to list */
3632 	list_add_tail(&dcb->list, &acb->dcb_list);
3633 
3634 	/* update device maps */
3635 	acb->dcb_map[dcb->target_id] |= (1 << dcb->target_lun);
3636 	acb->children[dcb->target_id][dcb->target_lun] = dcb;
3637 }
3638 
3639 
3640 /**
3641  * adapter_remove_device - Removes the device instance from the adaptor
3642  * instance. The device instance is not check in any way or freed by this.
3643  * The caller is expected to take care of that. This will simply remove the
3644  * device from the adapters data strcutures.
3645  *
3646  * @acb: The adapter device to be updated
3647  * @dcb: A device that has previously been added to the adapter.
3648  **/
adapter_remove_device(struct AdapterCtlBlk * acb,struct DeviceCtlBlk * dcb)3649 static void adapter_remove_device(struct AdapterCtlBlk *acb,
3650 		struct DeviceCtlBlk *dcb)
3651 {
3652 	struct DeviceCtlBlk *i;
3653 	struct DeviceCtlBlk *tmp;
3654 	dprintkdbg(DBG_0, "adapter_remove_device: <%02i-%i>\n",
3655 		dcb->target_id, dcb->target_lun);
3656 
3657 	/* fix up any pointers to this device that we have in the adapter */
3658 	if (acb->active_dcb == dcb)
3659 		acb->active_dcb = NULL;
3660 	if (acb->dcb_run_robin == dcb)
3661 		acb->dcb_run_robin = dcb_get_next(&acb->dcb_list, dcb);
3662 
3663 	/* unlink from list */
3664 	list_for_each_entry_safe(i, tmp, &acb->dcb_list, list)
3665 		if (dcb == i) {
3666 			list_del(&i->list);
3667 			break;
3668 		}
3669 
3670 	/* clear map and children */
3671 	acb->dcb_map[dcb->target_id] &= ~(1 << dcb->target_lun);
3672 	acb->children[dcb->target_id][dcb->target_lun] = NULL;
3673 	dcb->acb = NULL;
3674 }
3675 
3676 
3677 /**
3678  * adapter_remove_and_free_device - Removes a single device from the adapter
3679  * and then frees the device information.
3680  *
3681  * @acb: The adapter device to be updated
3682  * @dcb: A device that has previously been added to the adapter.
3683  */
adapter_remove_and_free_device(struct AdapterCtlBlk * acb,struct DeviceCtlBlk * dcb)3684 static void adapter_remove_and_free_device(struct AdapterCtlBlk *acb,
3685 		struct DeviceCtlBlk *dcb)
3686 {
3687 	if (list_size(&dcb->srb_going_list) > 1) {
3688 		dprintkdbg(DBG_1, "adapter_remove_and_free_device: <%02i-%i> "
3689 		           "Won't remove because of %i active requests.\n",
3690 			   dcb->target_id, dcb->target_lun,
3691 			   list_size(&dcb->srb_going_list));
3692 		return;
3693 	}
3694 	adapter_remove_device(acb, dcb);
3695 	kfree(dcb);
3696 }
3697 
3698 
3699 /**
3700  * adapter_remove_and_free_all_devices - Removes and frees all of the
3701  * devices associated with the specified adapter.
3702  *
3703  * @acb: The adapter from which all devices should be removed.
3704  **/
adapter_remove_and_free_all_devices(struct AdapterCtlBlk * acb)3705 static void adapter_remove_and_free_all_devices(struct AdapterCtlBlk* acb)
3706 {
3707 	struct DeviceCtlBlk *dcb;
3708 	struct DeviceCtlBlk *tmp;
3709 	dprintkdbg(DBG_1, "adapter_remove_and_free_all_devices: num=%i\n",
3710 		   list_size(&acb->dcb_list));
3711 
3712 	list_for_each_entry_safe(dcb, tmp, &acb->dcb_list, list)
3713 		adapter_remove_and_free_device(acb, dcb);
3714 }
3715 
3716 
3717 /**
3718  * dc395x_slave_alloc - Called by the scsi mid layer to tell us about a new
3719  * scsi device that we need to deal with. We allocate a new device and then
3720  * insert that device into the adapters device list.
3721  *
3722  * @scsi_device: The new scsi device that we need to handle.
3723  **/
dc395x_slave_alloc(struct scsi_device * scsi_device)3724 static int dc395x_slave_alloc(struct scsi_device *scsi_device)
3725 {
3726 	struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata;
3727 	struct DeviceCtlBlk *dcb;
3728 
3729 	dcb = device_alloc(acb, scsi_device->id, scsi_device->lun);
3730 	if (!dcb)
3731 		return -ENOMEM;
3732 	adapter_add_device(acb, dcb);
3733 
3734 	return 0;
3735 }
3736 
3737 
3738 /**
3739  * dc395x_slave_destroy - Called by the scsi mid layer to tell us about a
3740  * device that is going away.
3741  *
3742  * @scsi_device: The new scsi device that we need to handle.
3743  **/
dc395x_slave_destroy(struct scsi_device * scsi_device)3744 static void dc395x_slave_destroy(struct scsi_device *scsi_device)
3745 {
3746 	struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata;
3747 	struct DeviceCtlBlk *dcb = find_dcb(acb, scsi_device->id, scsi_device->lun);
3748 	if (dcb)
3749 		adapter_remove_and_free_device(acb, dcb);
3750 }
3751 
3752 
3753 
3754 
3755 /**
3756  * trms1040_wait_30us: wait for 30 us
3757  *
3758  * Waits for 30us (using the chip by the looks of it..)
3759  *
3760  * @io_port: base I/O address
3761  **/
trms1040_wait_30us(unsigned long io_port)3762 static void trms1040_wait_30us(unsigned long io_port)
3763 {
3764 	/* ScsiPortStallExecution(30); wait 30 us */
3765 	outb(5, io_port + TRM_S1040_GEN_TIMER);
3766 	while (!(inb(io_port + TRM_S1040_GEN_STATUS) & GTIMEOUT))
3767 		/* nothing */ ;
3768 }
3769 
3770 
3771 /**
3772  * trms1040_write_cmd - write the secified command and address to
3773  * chip
3774  *
3775  * @io_port:	base I/O address
3776  * @cmd:	SB + op code (command) to send
3777  * @addr:	address to send
3778  **/
trms1040_write_cmd(unsigned long io_port,u8 cmd,u8 addr)3779 static void trms1040_write_cmd(unsigned long io_port, u8 cmd, u8 addr)
3780 {
3781 	int i;
3782 	u8 send_data;
3783 
3784 	/* program SB + OP code */
3785 	for (i = 0; i < 3; i++, cmd <<= 1) {
3786 		send_data = NVR_SELECT;
3787 		if (cmd & 0x04)	/* Start from bit 2 */
3788 			send_data |= NVR_BITOUT;
3789 
3790 		outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
3791 		trms1040_wait_30us(io_port);
3792 		outb((send_data | NVR_CLOCK),
3793 		     io_port + TRM_S1040_GEN_NVRAM);
3794 		trms1040_wait_30us(io_port);
3795 	}
3796 
3797 	/* send address */
3798 	for (i = 0; i < 7; i++, addr <<= 1) {
3799 		send_data = NVR_SELECT;
3800 		if (addr & 0x40)	/* Start from bit 6 */
3801 			send_data |= NVR_BITOUT;
3802 
3803 		outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
3804 		trms1040_wait_30us(io_port);
3805 		outb((send_data | NVR_CLOCK),
3806 		     io_port + TRM_S1040_GEN_NVRAM);
3807 		trms1040_wait_30us(io_port);
3808 	}
3809 	outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
3810 	trms1040_wait_30us(io_port);
3811 }
3812 
3813 
3814 /**
3815  * trms1040_set_data - store a single byte in the eeprom
3816  *
3817  * Called from write all to write a single byte into the SSEEPROM
3818  * Which is done one bit at a time.
3819  *
3820  * @io_port:	base I/O address
3821  * @addr:	offset into EEPROM
3822  * @byte:	bytes to write
3823  **/
trms1040_set_data(unsigned long io_port,u8 addr,u8 byte)3824 static void trms1040_set_data(unsigned long io_port, u8 addr, u8 byte)
3825 {
3826 	int i;
3827 	u8 send_data;
3828 
3829 	/* Send write command & address */
3830 	trms1040_write_cmd(io_port, 0x05, addr);
3831 
3832 	/* Write data */
3833 	for (i = 0; i < 8; i++, byte <<= 1) {
3834 		send_data = NVR_SELECT;
3835 		if (byte & 0x80)	/* Start from bit 7 */
3836 			send_data |= NVR_BITOUT;
3837 
3838 		outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
3839 		trms1040_wait_30us(io_port);
3840 		outb((send_data | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
3841 		trms1040_wait_30us(io_port);
3842 	}
3843 	outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
3844 	trms1040_wait_30us(io_port);
3845 
3846 	/* Disable chip select */
3847 	outb(0, io_port + TRM_S1040_GEN_NVRAM);
3848 	trms1040_wait_30us(io_port);
3849 
3850 	outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
3851 	trms1040_wait_30us(io_port);
3852 
3853 	/* Wait for write ready */
3854 	while (1) {
3855 		outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
3856 		trms1040_wait_30us(io_port);
3857 
3858 		outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
3859 		trms1040_wait_30us(io_port);
3860 
3861 		if (inb(io_port + TRM_S1040_GEN_NVRAM) & NVR_BITIN)
3862 			break;
3863 	}
3864 
3865 	/*  Disable chip select */
3866 	outb(0, io_port + TRM_S1040_GEN_NVRAM);
3867 }
3868 
3869 
3870 /**
3871  * trms1040_write_all - write 128 bytes to the eeprom
3872  *
3873  * Write the supplied 128 bytes to the chips SEEPROM
3874  *
3875  * @eeprom:	the data to write
3876  * @io_port:	the base io port
3877  **/
trms1040_write_all(struct NvRamType * eeprom,unsigned long io_port)3878 static void trms1040_write_all(struct NvRamType *eeprom, unsigned long io_port)
3879 {
3880 	u8 *b_eeprom = (u8 *)eeprom;
3881 	u8 addr;
3882 
3883 	/* Enable SEEPROM */
3884 	outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM),
3885 	     io_port + TRM_S1040_GEN_CONTROL);
3886 
3887 	/* write enable */
3888 	trms1040_write_cmd(io_port, 0x04, 0xFF);
3889 	outb(0, io_port + TRM_S1040_GEN_NVRAM);
3890 	trms1040_wait_30us(io_port);
3891 
3892 	/* write */
3893 	for (addr = 0; addr < 128; addr++, b_eeprom++)
3894 		trms1040_set_data(io_port, addr, *b_eeprom);
3895 
3896 	/* write disable */
3897 	trms1040_write_cmd(io_port, 0x04, 0x00);
3898 	outb(0, io_port + TRM_S1040_GEN_NVRAM);
3899 	trms1040_wait_30us(io_port);
3900 
3901 	/* Disable SEEPROM */
3902 	outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM),
3903 	     io_port + TRM_S1040_GEN_CONTROL);
3904 }
3905 
3906 
3907 /**
3908  * trms1040_get_data - get a single byte from the eeprom
3909  *
3910  * Called from read all to read a single byte into the SSEEPROM
3911  * Which is done one bit at a time.
3912  *
3913  * @io_port:	base I/O address
3914  * @addr:	offset into SEEPROM
3915  *
3916  * Returns the byte read.
3917  **/
trms1040_get_data(unsigned long io_port,u8 addr)3918 static u8 trms1040_get_data(unsigned long io_port, u8 addr)
3919 {
3920 	int i;
3921 	u8 read_byte;
3922 	u8 result = 0;
3923 
3924 	/* Send read command & address */
3925 	trms1040_write_cmd(io_port, 0x06, addr);
3926 
3927 	/* read data */
3928 	for (i = 0; i < 8; i++) {
3929 		outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
3930 		trms1040_wait_30us(io_port);
3931 		outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
3932 
3933 		/* Get data bit while falling edge */
3934 		read_byte = inb(io_port + TRM_S1040_GEN_NVRAM);
3935 		result <<= 1;
3936 		if (read_byte & NVR_BITIN)
3937 			result |= 1;
3938 
3939 		trms1040_wait_30us(io_port);
3940 	}
3941 
3942 	/* Disable chip select */
3943 	outb(0, io_port + TRM_S1040_GEN_NVRAM);
3944 	return result;
3945 }
3946 
3947 
3948 /**
3949  * trms1040_read_all - read all bytes from the eeprom
3950  *
3951  * Read the 128 bytes from the SEEPROM.
3952  *
3953  * @eeprom:	where to store the data
3954  * @io_port:	the base io port
3955  **/
trms1040_read_all(struct NvRamType * eeprom,unsigned long io_port)3956 static void trms1040_read_all(struct NvRamType *eeprom, unsigned long io_port)
3957 {
3958 	u8 *b_eeprom = (u8 *)eeprom;
3959 	u8 addr;
3960 
3961 	/* Enable SEEPROM */
3962 	outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM),
3963 	     io_port + TRM_S1040_GEN_CONTROL);
3964 
3965 	/* read details */
3966 	for (addr = 0; addr < 128; addr++, b_eeprom++)
3967 		*b_eeprom = trms1040_get_data(io_port, addr);
3968 
3969 	/* Disable SEEPROM */
3970 	outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM),
3971 	     io_port + TRM_S1040_GEN_CONTROL);
3972 }
3973 
3974 
3975 
3976 /**
3977  * check_eeprom - get and check contents of the eeprom
3978  *
3979  * Read seeprom 128 bytes into the memory provider in eeprom.
3980  * Checks the checksum and if it's not correct it uses a set of default
3981  * values.
3982  *
3983  * @eeprom:	caller allocated strcuture to read the eeprom data into
3984  * @io_port:	io port to read from
3985  **/
check_eeprom(struct NvRamType * eeprom,unsigned long io_port)3986 static void check_eeprom(struct NvRamType *eeprom, unsigned long io_port)
3987 {
3988 	u16 *w_eeprom = (u16 *)eeprom;
3989 	u16 w_addr;
3990 	u16 cksum;
3991 	u32 d_addr;
3992 	u32 *d_eeprom;
3993 
3994 	trms1040_read_all(eeprom, io_port);	/* read eeprom */
3995 
3996 	cksum = 0;
3997 	for (w_addr = 0, w_eeprom = (u16 *)eeprom; w_addr < 64;
3998 	     w_addr++, w_eeprom++)
3999 		cksum += *w_eeprom;
4000 	if (cksum != 0x1234) {
4001 		/*
4002 		 * Checksum is wrong.
4003 		 * Load a set of defaults into the eeprom buffer
4004 		 */
4005 		dprintkl(KERN_WARNING,
4006 			"EEProm checksum error: using default values and options.\n");
4007 		eeprom->sub_vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM;
4008 		eeprom->sub_vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8);
4009 		eeprom->sub_sys_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040;
4010 		eeprom->sub_sys_id[1] =
4011 		    (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8);
4012 		eeprom->sub_class = 0x00;
4013 		eeprom->vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM;
4014 		eeprom->vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8);
4015 		eeprom->device_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040;
4016 		eeprom->device_id[1] =
4017 		    (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8);
4018 		eeprom->reserved = 0x00;
4019 
4020 		for (d_addr = 0, d_eeprom = (u32 *)eeprom->target;
4021 		     d_addr < 16; d_addr++, d_eeprom++)
4022 			*d_eeprom = 0x00000077;	/* cfg3,cfg2,period,cfg0 */
4023 
4024 		*d_eeprom++ = 0x04000F07;	/* max_tag,delay_time,channel_cfg,scsi_id */
4025 		*d_eeprom++ = 0x00000015;	/* reserved1,boot_lun,boot_target,reserved0 */
4026 		for (d_addr = 0; d_addr < 12; d_addr++, d_eeprom++)
4027 			*d_eeprom = 0x00;
4028 
4029 		/* Now load defaults (maybe set by boot/module params) */
4030 		set_safe_settings();
4031 		fix_settings();
4032 		eeprom_override(eeprom);
4033 
4034 		eeprom->cksum = 0x00;
4035 		for (w_addr = 0, cksum = 0, w_eeprom = (u16 *)eeprom;
4036 		     w_addr < 63; w_addr++, w_eeprom++)
4037 			cksum += *w_eeprom;
4038 
4039 		*w_eeprom = 0x1234 - cksum;
4040 		trms1040_write_all(eeprom, io_port);
4041 		eeprom->delay_time = cfg_data[CFG_RESET_DELAY].value;
4042 	} else {
4043 		set_safe_settings();
4044 		eeprom_index_to_delay(eeprom);
4045 		eeprom_override(eeprom);
4046 	}
4047 }
4048 
4049 
4050 /**
4051  * print_eeprom_settings - output the eeprom settings
4052  * to the kernel log so people can see what they were.
4053  *
4054  * @eeprom: The eeprom data strucutre to show details for.
4055  **/
print_eeprom_settings(struct NvRamType * eeprom)4056 static void print_eeprom_settings(struct NvRamType *eeprom)
4057 {
4058 	dprintkl(KERN_INFO, "Used settings: AdapterID=%02i, Speed=%i(%02i.%01iMHz), dev_mode=0x%02x\n",
4059 		eeprom->scsi_id,
4060 		eeprom->target[0].period,
4061 		clock_speed[eeprom->target[0].period] / 10,
4062 		clock_speed[eeprom->target[0].period] % 10,
4063 		eeprom->target[0].cfg0);
4064 	dprintkl(KERN_INFO, "               AdaptMode=0x%02x, Tags=%i(%02i), DelayReset=%is\n",
4065 		eeprom->channel_cfg, eeprom->max_tag,
4066 		1 << eeprom->max_tag, eeprom->delay_time);
4067 }
4068 
4069 
4070 /* Free SG tables */
adapter_sg_tables_free(struct AdapterCtlBlk * acb)4071 static void adapter_sg_tables_free(struct AdapterCtlBlk *acb)
4072 {
4073 	int i;
4074 	const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN;
4075 
4076 	for (i = 0; i < DC395x_MAX_SRB_CNT; i += srbs_per_page)
4077 		kfree(acb->srb_array[i].segment_x);
4078 }
4079 
4080 
4081 /*
4082  * Allocate SG tables; as we have to pci_map them, an SG list (struct SGentry*)
4083  * should never cross a page boundary */
adapter_sg_tables_alloc(struct AdapterCtlBlk * acb)4084 static int adapter_sg_tables_alloc(struct AdapterCtlBlk *acb)
4085 {
4086 	const unsigned mem_needed = (DC395x_MAX_SRB_CNT+1)
4087 	                            *SEGMENTX_LEN;
4088 	int pages = (mem_needed+(PAGE_SIZE-1))/PAGE_SIZE;
4089 	const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN;
4090 	int srb_idx = 0;
4091 	unsigned i = 0;
4092 	struct SGentry *ptr;
4093 
4094 	for (i = 0; i < DC395x_MAX_SRB_CNT; i++)
4095 		acb->srb_array[i].segment_x = NULL;
4096 
4097 	dprintkdbg(DBG_1, "Allocate %i pages for SG tables\n", pages);
4098 	while (pages--) {
4099 		ptr = kmalloc(PAGE_SIZE, GFP_KERNEL);
4100 		if (!ptr) {
4101 			adapter_sg_tables_free(acb);
4102 			return 1;
4103 		}
4104 		dprintkdbg(DBG_1, "Allocate %li bytes at %p for SG segments %i\n",
4105 			PAGE_SIZE, ptr, srb_idx);
4106 		i = 0;
4107 		while (i < srbs_per_page && srb_idx < DC395x_MAX_SRB_CNT)
4108 			acb->srb_array[srb_idx++].segment_x =
4109 			    ptr + (i++ * DC395x_MAX_SG_LISTENTRY);
4110 	}
4111 	if (i < srbs_per_page)
4112 		acb->srb.segment_x =
4113 		    ptr + (i * DC395x_MAX_SG_LISTENTRY);
4114 	else
4115 		dprintkl(KERN_DEBUG, "No space for tmsrb SG table reserved?!\n");
4116 	return 0;
4117 }
4118 
4119 
4120 
4121 /**
4122  * adapter_print_config - print adapter connection and termination
4123  * config
4124  *
4125  * The io port in the adapter needs to have been set before calling
4126  * this function.
4127  *
4128  * @acb: The adapter to print the information for.
4129  **/
adapter_print_config(struct AdapterCtlBlk * acb)4130 static void adapter_print_config(struct AdapterCtlBlk *acb)
4131 {
4132 	u8 bval;
4133 
4134 	bval = DC395x_read8(acb, TRM_S1040_GEN_STATUS);
4135 	dprintkl(KERN_INFO, "%sConnectors: ",
4136 		((bval & WIDESCSI) ? "(Wide) " : ""));
4137 	if (!(bval & CON5068))
4138 		printk("ext%s ", !(bval & EXT68HIGH) ? "68" : "50");
4139 	if (!(bval & CON68))
4140 		printk("int68%s ", !(bval & INT68HIGH) ? "" : "(50)");
4141 	if (!(bval & CON50))
4142 		printk("int50 ");
4143 	if ((bval & (CON5068 | CON50 | CON68)) ==
4144 	    0 /*(CON5068 | CON50 | CON68) */ )
4145 		printk(" Oops! (All 3?) ");
4146 	bval = DC395x_read8(acb, TRM_S1040_GEN_CONTROL);
4147 	printk(" Termination: ");
4148 	if (bval & DIS_TERM)
4149 		printk("Disabled\n");
4150 	else {
4151 		if (bval & AUTOTERM)
4152 			printk("Auto ");
4153 		if (bval & LOW8TERM)
4154 			printk("Low ");
4155 		if (bval & UP8TERM)
4156 			printk("High ");
4157 		printk("\n");
4158 	}
4159 }
4160 
4161 
4162 /**
4163  * adapter_init_params - Initialize the various parameters in the
4164  * adapter structure. Note that the pointer to the scsi_host is set
4165  * early (when this instance is created) and the io_port and irq
4166  * values are set later after they have been reserved. This just gets
4167  * everything set to a good starting position.
4168  *
4169  * The eeprom structure in the adapter needs to have been set before
4170  * calling this function.
4171  *
4172  * @acb: The adapter to initialize.
4173  **/
adapter_init_params(struct AdapterCtlBlk * acb)4174 static void adapter_init_params(struct AdapterCtlBlk *acb)
4175 {
4176 	struct NvRamType *eeprom = &acb->eeprom;
4177 	int i;
4178 
4179 	/* NOTE: acb->scsi_host is set at scsi_host/acb creation time */
4180 	/* NOTE: acb->io_port_base is set at port registration time */
4181 	/* NOTE: acb->io_port_len is set at port registration time */
4182 
4183 	INIT_LIST_HEAD(&acb->dcb_list);
4184 	acb->dcb_run_robin = NULL;
4185 	acb->active_dcb = NULL;
4186 
4187 	INIT_LIST_HEAD(&acb->srb_free_list);
4188 	/*  temp SRB for Q tag used or abort command used  */
4189 	acb->tmp_srb = &acb->srb;
4190 	timer_setup(&acb->waiting_timer, waiting_timeout, 0);
4191 	timer_setup(&acb->selto_timer, NULL, 0);
4192 
4193 	acb->srb_count = DC395x_MAX_SRB_CNT;
4194 
4195 	acb->sel_timeout = DC395x_SEL_TIMEOUT;	/* timeout=250ms */
4196 	/* NOTE: acb->irq_level is set at IRQ registration time */
4197 
4198 	acb->tag_max_num = 1 << eeprom->max_tag;
4199 	if (acb->tag_max_num > 30)
4200 		acb->tag_max_num = 30;
4201 
4202 	acb->acb_flag = 0;	/* RESET_DETECT, RESET_DONE, RESET_DEV */
4203 	acb->gmode2 = eeprom->channel_cfg;
4204 	acb->config = 0;	/* NOTE: actually set in adapter_init_chip */
4205 
4206 	if (eeprom->channel_cfg & NAC_SCANLUN)
4207 		acb->lun_chk = 1;
4208 	acb->scan_devices = 1;
4209 
4210 	acb->scsi_host->this_id = eeprom->scsi_id;
4211 	acb->hostid_bit = (1 << acb->scsi_host->this_id);
4212 
4213 	for (i = 0; i < DC395x_MAX_SCSI_ID; i++)
4214 		acb->dcb_map[i] = 0;
4215 
4216 	acb->msg_len = 0;
4217 
4218 	/* link static array of srbs into the srb free list */
4219 	for (i = 0; i < acb->srb_count - 1; i++)
4220 		list_add_tail(&acb->srb_array[i].list, &acb->srb_free_list);
4221 }
4222 
4223 
4224 /**
4225  * adapter_init_scsi_host - Initialize the scsi host instance based on
4226  * values that we have already stored in the adapter instance. There's
4227  * some mention that a lot of these are deprecated, so we won't use
4228  * them (we'll use the ones in the adapter instance) but we'll fill
4229  * them in in case something else needs them.
4230  *
4231  * The eeprom structure, irq and io ports in the adapter need to have
4232  * been set before calling this function.
4233  *
4234  * @host: The scsi host instance to fill in the values for.
4235  **/
adapter_init_scsi_host(struct Scsi_Host * host)4236 static void adapter_init_scsi_host(struct Scsi_Host *host)
4237 {
4238         struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata;
4239 	struct NvRamType *eeprom = &acb->eeprom;
4240 
4241 	host->max_cmd_len = 24;
4242 	host->can_queue = DC395x_MAX_CMD_QUEUE;
4243 	host->cmd_per_lun = DC395x_MAX_CMD_PER_LUN;
4244 	host->this_id = (int)eeprom->scsi_id;
4245 	host->io_port = acb->io_port_base;
4246 	host->n_io_port = acb->io_port_len;
4247 	host->dma_channel = -1;
4248 	host->unique_id = acb->io_port_base;
4249 	host->irq = acb->irq_level;
4250 	acb->last_reset = jiffies;
4251 
4252 	host->max_id = 16;
4253 	if (host->max_id - 1 == eeprom->scsi_id)
4254 		host->max_id--;
4255 
4256 	if (eeprom->channel_cfg & NAC_SCANLUN)
4257 		host->max_lun = 8;
4258 	else
4259 		host->max_lun = 1;
4260 }
4261 
4262 
4263 /**
4264  * adapter_init_chip - Get the chip into a know state and figure out
4265  * some of the settings that apply to this adapter.
4266  *
4267  * The io port in the adapter needs to have been set before calling
4268  * this function. The config will be configured correctly on return.
4269  *
4270  * @acb: The adapter which we are to init.
4271  **/
adapter_init_chip(struct AdapterCtlBlk * acb)4272 static void adapter_init_chip(struct AdapterCtlBlk *acb)
4273 {
4274         struct NvRamType *eeprom = &acb->eeprom;
4275 
4276         /* Mask all the interrupt */
4277 	DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00);
4278 	DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00);
4279 
4280 	/* Reset SCSI module */
4281 	DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
4282 
4283 	/* Reset PCI/DMA module */
4284 	DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
4285 	udelay(20);
4286 
4287 	/* program configuration 0 */
4288 	acb->config = HCC_AUTOTERM | HCC_PARITY;
4289 	if (DC395x_read8(acb, TRM_S1040_GEN_STATUS) & WIDESCSI)
4290 		acb->config |= HCC_WIDE_CARD;
4291 
4292 	if (eeprom->channel_cfg & NAC_POWERON_SCSI_RESET)
4293 		acb->config |= HCC_SCSI_RESET;
4294 
4295 	if (acb->config & HCC_SCSI_RESET) {
4296 		dprintkl(KERN_INFO, "Performing initial SCSI bus reset\n");
4297 		DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI);
4298 
4299 		/*while (!( DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET )); */
4300 		/*spin_unlock_irq (&io_request_lock); */
4301 		udelay(500);
4302 
4303 		acb->last_reset =
4304 		    jiffies + HZ / 2 +
4305 		    HZ * acb->eeprom.delay_time;
4306 
4307 		/*spin_lock_irq (&io_request_lock); */
4308 	}
4309 }
4310 
4311 
4312 /**
4313  * adapter_init - Grab the resource for the card, setup the adapter
4314  * information, set the card into a known state, create the various
4315  * tables etc etc. This basically gets all adapter information all up
4316  * to date, initialised and gets the chip in sync with it.
4317  *
4318  * @acb:	The adapter which we are to init.
4319  * @io_port:	The base I/O port
4320  * @io_port_len: The I/O port size
4321  * @irq:	IRQ
4322  *
4323  * Returns 0 if the initialization succeeds, any other value on
4324  * failure.
4325  **/
adapter_init(struct AdapterCtlBlk * acb,unsigned long io_port,u32 io_port_len,unsigned int irq)4326 static int adapter_init(struct AdapterCtlBlk *acb, unsigned long io_port,
4327 			u32 io_port_len, unsigned int irq)
4328 {
4329 	if (!request_region(io_port, io_port_len, DC395X_NAME)) {
4330 		dprintkl(KERN_ERR, "Failed to reserve IO region 0x%lx\n", io_port);
4331 		goto failed;
4332 	}
4333 	/* store port base to indicate we have registered it */
4334 	acb->io_port_base = io_port;
4335 	acb->io_port_len = io_port_len;
4336 
4337 	if (request_irq(irq, dc395x_interrupt, IRQF_SHARED, DC395X_NAME, acb)) {
4338 	    	/* release the region we just claimed */
4339 		dprintkl(KERN_INFO, "Failed to register IRQ\n");
4340 		goto failed;
4341 	}
4342 	/* store irq to indicate we have registered it */
4343 	acb->irq_level = irq;
4344 
4345 	/* get eeprom configuration information and command line settings etc */
4346 	check_eeprom(&acb->eeprom, io_port);
4347  	print_eeprom_settings(&acb->eeprom);
4348 
4349 	/* setup adapter control block */
4350 	adapter_init_params(acb);
4351 
4352 	/* display card connectors/termination settings */
4353  	adapter_print_config(acb);
4354 
4355 	if (adapter_sg_tables_alloc(acb)) {
4356 		dprintkl(KERN_DEBUG, "Memory allocation for SG tables failed\n");
4357 		goto failed;
4358 	}
4359 	adapter_init_scsi_host(acb->scsi_host);
4360 	adapter_init_chip(acb);
4361 	set_basic_config(acb);
4362 
4363 	dprintkdbg(DBG_0,
4364 		"adapter_init: acb=%p, pdcb_map=%p psrb_array=%p "
4365 		"size{acb=0x%04x dcb=0x%04x srb=0x%04x}\n",
4366 		acb, acb->dcb_map, acb->srb_array, sizeof(struct AdapterCtlBlk),
4367 		sizeof(struct DeviceCtlBlk), sizeof(struct ScsiReqBlk));
4368 	return 0;
4369 
4370 failed:
4371 	if (acb->irq_level)
4372 		free_irq(acb->irq_level, acb);
4373 	if (acb->io_port_base)
4374 		release_region(acb->io_port_base, acb->io_port_len);
4375 	adapter_sg_tables_free(acb);
4376 
4377 	return 1;
4378 }
4379 
4380 
4381 /**
4382  * adapter_uninit_chip - cleanly shut down the scsi controller chip,
4383  * stopping all operations and disabling interrupt generation on the
4384  * card.
4385  *
4386  * @acb: The adapter which we are to shutdown.
4387  **/
adapter_uninit_chip(struct AdapterCtlBlk * acb)4388 static void adapter_uninit_chip(struct AdapterCtlBlk *acb)
4389 {
4390 	/* disable interrupts */
4391 	DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0);
4392 	DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0);
4393 
4394 	/* reset the scsi bus */
4395 	if (acb->config & HCC_SCSI_RESET)
4396 		reset_scsi_bus(acb);
4397 
4398 	/* clear any pending interrupt state */
4399 	DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
4400 }
4401 
4402 
4403 
4404 /**
4405  * adapter_uninit - Shut down the chip and release any resources that
4406  * we had allocated. Once this returns the adapter should not be used
4407  * anymore.
4408  *
4409  * @acb: The adapter which we are to un-initialize.
4410  **/
adapter_uninit(struct AdapterCtlBlk * acb)4411 static void adapter_uninit(struct AdapterCtlBlk *acb)
4412 {
4413 	unsigned long flags;
4414 	DC395x_LOCK_IO(acb->scsi_host, flags);
4415 
4416 	/* remove timers */
4417 	if (timer_pending(&acb->waiting_timer))
4418 		del_timer(&acb->waiting_timer);
4419 	if (timer_pending(&acb->selto_timer))
4420 		del_timer(&acb->selto_timer);
4421 
4422 	adapter_uninit_chip(acb);
4423 	adapter_remove_and_free_all_devices(acb);
4424 	DC395x_UNLOCK_IO(acb->scsi_host, flags);
4425 
4426 	if (acb->irq_level)
4427 		free_irq(acb->irq_level, acb);
4428 	if (acb->io_port_base)
4429 		release_region(acb->io_port_base, acb->io_port_len);
4430 
4431 	adapter_sg_tables_free(acb);
4432 }
4433 
4434 
4435 #undef YESNO
4436 #define YESNO(YN) \
4437  if (YN) seq_printf(m, " Yes ");\
4438  else seq_printf(m, " No  ")
4439 
dc395x_show_info(struct seq_file * m,struct Scsi_Host * host)4440 static int dc395x_show_info(struct seq_file *m, struct Scsi_Host *host)
4441 {
4442 	struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata;
4443 	int spd, spd1;
4444 	struct DeviceCtlBlk *dcb;
4445 	unsigned long flags;
4446 	int dev;
4447 
4448 	seq_puts(m, DC395X_BANNER " PCI SCSI Host Adapter\n"
4449 		" Driver Version " DC395X_VERSION "\n");
4450 
4451 	DC395x_LOCK_IO(acb->scsi_host, flags);
4452 
4453 	seq_printf(m, "SCSI Host Nr %i, ", host->host_no);
4454 	seq_printf(m, "DC395U/UW/F DC315/U %s\n",
4455 		(acb->config & HCC_WIDE_CARD) ? "Wide" : "");
4456 	seq_printf(m, "io_port_base 0x%04lx, ", acb->io_port_base);
4457 	seq_printf(m, "irq_level 0x%04x, ", acb->irq_level);
4458 	seq_printf(m, " SelTimeout %ims\n", (1638 * acb->sel_timeout) / 1000);
4459 
4460 	seq_printf(m, "MaxID %i, MaxLUN %llu, ", host->max_id, host->max_lun);
4461 	seq_printf(m, "AdapterID %i\n", host->this_id);
4462 
4463 	seq_printf(m, "tag_max_num %i", acb->tag_max_num);
4464 	/*seq_printf(m, ", DMA_Status %i\n", DC395x_read8(acb, TRM_S1040_DMA_STATUS)); */
4465 	seq_printf(m, ", FilterCfg 0x%02x",
4466 		DC395x_read8(acb, TRM_S1040_SCSI_CONFIG1));
4467 	seq_printf(m, ", DelayReset %is\n", acb->eeprom.delay_time);
4468 	/*seq_printf(m, "\n"); */
4469 
4470 	seq_printf(m, "Nr of DCBs: %i\n", list_size(&acb->dcb_list));
4471 	seq_printf(m, "Map of attached LUNs: %8ph\n", &acb->dcb_map[0]);
4472 	seq_printf(m, "                      %8ph\n", &acb->dcb_map[8]);
4473 
4474 	seq_puts(m,
4475 		 "Un ID LUN Prty Sync Wide DsCn SndS TagQ nego_period SyncFreq SyncOffs MaxCmd\n");
4476 
4477 	dev = 0;
4478 	list_for_each_entry(dcb, &acb->dcb_list, list) {
4479 		int nego_period;
4480 		seq_printf(m, "%02i %02i  %02i ", dev, dcb->target_id,
4481 			dcb->target_lun);
4482 		YESNO(dcb->dev_mode & NTC_DO_PARITY_CHK);
4483 		YESNO(dcb->sync_offset);
4484 		YESNO(dcb->sync_period & WIDE_SYNC);
4485 		YESNO(dcb->dev_mode & NTC_DO_DISCONNECT);
4486 		YESNO(dcb->dev_mode & NTC_DO_SEND_START);
4487 		YESNO(dcb->sync_mode & EN_TAG_QUEUEING);
4488 		nego_period = clock_period[dcb->sync_period & 0x07] << 2;
4489 		if (dcb->sync_offset)
4490 			seq_printf(m, "  %03i ns ", nego_period);
4491 		else
4492 			seq_printf(m, " (%03i ns)", (dcb->min_nego_period << 2));
4493 
4494 		if (dcb->sync_offset & 0x0f) {
4495 			spd = 1000 / (nego_period);
4496 			spd1 = 1000 % (nego_period);
4497 			spd1 = (spd1 * 10 + nego_period / 2) / (nego_period);
4498 			seq_printf(m, "   %2i.%1i M     %02i ", spd, spd1,
4499 				(dcb->sync_offset & 0x0f));
4500 		} else
4501 			seq_puts(m, "                 ");
4502 
4503 		/* Add more info ... */
4504 		seq_printf(m, "     %02i\n", dcb->max_command);
4505 		dev++;
4506 	}
4507 
4508 	if (timer_pending(&acb->waiting_timer))
4509 		seq_puts(m, "Waiting queue timer running\n");
4510 	else
4511 		seq_putc(m, '\n');
4512 
4513 	list_for_each_entry(dcb, &acb->dcb_list, list) {
4514 		struct ScsiReqBlk *srb;
4515 		if (!list_empty(&dcb->srb_waiting_list))
4516 			seq_printf(m, "DCB (%02i-%i): Waiting: %i:",
4517 				dcb->target_id, dcb->target_lun,
4518 				list_size(&dcb->srb_waiting_list));
4519                 list_for_each_entry(srb, &dcb->srb_waiting_list, list)
4520 			seq_printf(m, " %p", srb->cmd);
4521 		if (!list_empty(&dcb->srb_going_list))
4522 			seq_printf(m, "\nDCB (%02i-%i): Going  : %i:",
4523 				dcb->target_id, dcb->target_lun,
4524 				list_size(&dcb->srb_going_list));
4525 		list_for_each_entry(srb, &dcb->srb_going_list, list)
4526 			seq_printf(m, " %p", srb->cmd);
4527 		if (!list_empty(&dcb->srb_waiting_list) || !list_empty(&dcb->srb_going_list))
4528 			seq_putc(m, '\n');
4529 	}
4530 
4531 	if (debug_enabled(DBG_1)) {
4532 		seq_printf(m, "DCB list for ACB %p:\n", acb);
4533 		list_for_each_entry(dcb, &acb->dcb_list, list) {
4534 			seq_printf(m, "%p -> ", dcb);
4535 		}
4536 		seq_puts(m, "END\n");
4537 	}
4538 
4539 	DC395x_UNLOCK_IO(acb->scsi_host, flags);
4540 	return 0;
4541 }
4542 
4543 
4544 static const struct scsi_host_template dc395x_driver_template = {
4545 	.module                 = THIS_MODULE,
4546 	.proc_name              = DC395X_NAME,
4547 	.show_info              = dc395x_show_info,
4548 	.name                   = DC395X_BANNER " " DC395X_VERSION,
4549 	.queuecommand           = dc395x_queue_command,
4550 	.slave_alloc            = dc395x_slave_alloc,
4551 	.slave_destroy          = dc395x_slave_destroy,
4552 	.can_queue              = DC395x_MAX_CAN_QUEUE,
4553 	.this_id                = 7,
4554 	.sg_tablesize           = DC395x_MAX_SG_TABLESIZE,
4555 	.cmd_per_lun            = DC395x_MAX_CMD_PER_LUN,
4556 	.eh_abort_handler       = dc395x_eh_abort,
4557 	.eh_bus_reset_handler   = dc395x_eh_bus_reset,
4558 	.dma_boundary		= PAGE_SIZE - 1,
4559 };
4560 
4561 
4562 /**
4563  * banner_display - Display banner on first instance of driver
4564  * initialized.
4565  **/
banner_display(void)4566 static void banner_display(void)
4567 {
4568 	static int banner_done = 0;
4569 	if (!banner_done)
4570 	{
4571 		dprintkl(KERN_INFO, "%s %s\n", DC395X_BANNER, DC395X_VERSION);
4572 		banner_done = 1;
4573 	}
4574 }
4575 
4576 
4577 /**
4578  * dc395x_init_one - Initialise a single instance of the adapter.
4579  *
4580  * The PCI layer will call this once for each instance of the adapter
4581  * that it finds in the system. The pci_dev strcuture indicates which
4582  * instance we are being called from.
4583  *
4584  * @dev: The PCI device to initialize.
4585  * @id: Looks like a pointer to the entry in our pci device table
4586  * that was actually matched by the PCI subsystem.
4587  *
4588  * Returns 0 on success, or an error code (-ve) on failure.
4589  **/
dc395x_init_one(struct pci_dev * dev,const struct pci_device_id * id)4590 static int dc395x_init_one(struct pci_dev *dev, const struct pci_device_id *id)
4591 {
4592 	struct Scsi_Host *scsi_host = NULL;
4593 	struct AdapterCtlBlk *acb = NULL;
4594 	unsigned long io_port_base;
4595 	unsigned int io_port_len;
4596 	unsigned int irq;
4597 
4598 	dprintkdbg(DBG_0, "Init one instance (%s)\n", pci_name(dev));
4599 	banner_display();
4600 
4601 	if (pci_enable_device(dev))
4602 	{
4603 		dprintkl(KERN_INFO, "PCI Enable device failed.\n");
4604 		return -ENODEV;
4605 	}
4606 	io_port_base = pci_resource_start(dev, 0) & PCI_BASE_ADDRESS_IO_MASK;
4607 	io_port_len = pci_resource_len(dev, 0);
4608 	irq = dev->irq;
4609 	dprintkdbg(DBG_0, "IO_PORT=0x%04lx, IRQ=0x%x\n", io_port_base, dev->irq);
4610 
4611 	/* allocate scsi host information (includes out adapter) */
4612 	scsi_host = scsi_host_alloc(&dc395x_driver_template,
4613 				    sizeof(struct AdapterCtlBlk));
4614 	if (!scsi_host) {
4615 		dprintkl(KERN_INFO, "scsi_host_alloc failed\n");
4616 		goto fail;
4617 	}
4618  	acb = (struct AdapterCtlBlk*)scsi_host->hostdata;
4619  	acb->scsi_host = scsi_host;
4620  	acb->dev = dev;
4621 
4622 	/* initialise the adapter and everything we need */
4623  	if (adapter_init(acb, io_port_base, io_port_len, irq)) {
4624 		dprintkl(KERN_INFO, "adapter init failed\n");
4625 		acb = NULL;
4626 		goto fail;
4627 	}
4628 
4629 	pci_set_master(dev);
4630 
4631 	/* get the scsi mid level to scan for new devices on the bus */
4632 	if (scsi_add_host(scsi_host, &dev->dev)) {
4633 		dprintkl(KERN_ERR, "scsi_add_host failed\n");
4634 		goto fail;
4635 	}
4636 	pci_set_drvdata(dev, scsi_host);
4637 	scsi_scan_host(scsi_host);
4638 
4639 	return 0;
4640 
4641 fail:
4642 	if (acb != NULL)
4643 		adapter_uninit(acb);
4644 	if (scsi_host != NULL)
4645 		scsi_host_put(scsi_host);
4646 	pci_disable_device(dev);
4647 	return -ENODEV;
4648 }
4649 
4650 
4651 /**
4652  * dc395x_remove_one - Called to remove a single instance of the
4653  * adapter.
4654  *
4655  * @dev: The PCI device to initialize.
4656  **/
dc395x_remove_one(struct pci_dev * dev)4657 static void dc395x_remove_one(struct pci_dev *dev)
4658 {
4659 	struct Scsi_Host *scsi_host = pci_get_drvdata(dev);
4660 	struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)(scsi_host->hostdata);
4661 
4662 	dprintkdbg(DBG_0, "dc395x_remove_one: acb=%p\n", acb);
4663 
4664 	scsi_remove_host(scsi_host);
4665 	adapter_uninit(acb);
4666 	pci_disable_device(dev);
4667 	scsi_host_put(scsi_host);
4668 }
4669 
4670 
4671 static struct pci_device_id dc395x_pci_table[] = {
4672 	{
4673 		.vendor		= PCI_VENDOR_ID_TEKRAM,
4674 		.device		= PCI_DEVICE_ID_TEKRAM_TRMS1040,
4675 		.subvendor	= PCI_ANY_ID,
4676 		.subdevice	= PCI_ANY_ID,
4677 	 },
4678 	{}			/* Terminating entry */
4679 };
4680 MODULE_DEVICE_TABLE(pci, dc395x_pci_table);
4681 
4682 
4683 static struct pci_driver dc395x_driver = {
4684 	.name           = DC395X_NAME,
4685 	.id_table       = dc395x_pci_table,
4686 	.probe          = dc395x_init_one,
4687 	.remove         = dc395x_remove_one,
4688 };
4689 module_pci_driver(dc395x_driver);
4690 
4691 MODULE_AUTHOR("C.L. Huang / Erich Chen / Kurt Garloff");
4692 MODULE_DESCRIPTION("SCSI host adapter driver for Tekram TRM-S1040 based adapters: Tekram DC395 and DC315 series");
4693 MODULE_LICENSE("GPL");
4694