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 | **/ |
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 | **/ |
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 | **/ |
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 | **/ |
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 | **/ |
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 | delay: 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 | |
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 | |
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 | |
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 */ |
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 */ |
741 | static void waiting_set_timer(struct AdapterCtlBlk *acb, unsigned long to) |
742 | { |
743 | if (timer_pending(timer: &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(timer: &acb->waiting_timer); |
751 | } |
752 | |
753 | |
754 | /* Send the next command from the waiting list to the bus */ |
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(timer: &acb->waiting_timer)) |
768 | del_timer(timer: &acb->waiting_timer); |
769 | |
770 | if (list_empty(head: 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(head: dcb_list_head, |
799 | pos: acb->dcb_run_robin); |
800 | |
801 | if (list_empty(head: waiting_list_head) || |
802 | pos->max_command <= list_size(head: &pos->srb_going_list)) { |
803 | /* move to next dcb */ |
804 | pos = dcb_get_next(head: 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, dcb: pos, srb)) |
811 | list_move(list: &srb->list, head: &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 */ |
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 */ |
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) */ |
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(head: &dcb->srb_going_list) || |
846 | acb->active_dcb || |
847 | (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV))) { |
848 | list_add_tail(new: &srb->list, head: &dcb->srb_waiting_list); |
849 | waiting_process_next(acb); |
850 | return; |
851 | } |
852 | |
853 | if (!start_scsi(acb, dcb, srb)) { |
854 | list_add_tail(new: &srb->list, head: &dcb->srb_going_list); |
855 | } else { |
856 | list_add(new: &srb->list, head: &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 */ |
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 | */ |
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, status: 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, id: cmd->device->id, lun: 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, status: DID_OK); |
999 | set_status_byte(cmd, status: 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(entry: &srb->list); |
1012 | |
1013 | build_srb(cmd, dcb, srb); |
1014 | |
1015 | if (!list_empty(head: &dcb->srb_waiting_list)) { |
1016 | /* append to waiting queue */ |
1017 | list_add_tail(new: &srb->list, head: &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 | |
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, val: &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 | |
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 | |
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 | */ |
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(timer: &acb->waiting_timer)) |
1156 | del_timer(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, txt: "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_code: DID_RESET, cmd, force: 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 | |
1193 | static int dc395x_eh_bus_reset(struct scsi_cmnd *cmd) |
1194 | { |
1195 | int rc; |
1196 | |
1197 | spin_lock_irq(lock: cmd->device->host->host_lock); |
1198 | rc = __dc395x_eh_bus_reset(cmd); |
1199 | spin_unlock_irq(lock: 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 | */ |
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, id: cmd->device->id, lun: 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, head: &dcb->srb_waiting_list); |
1229 | if (srb) { |
1230 | list_del(entry: &srb->list); |
1231 | pci_unmap_srb_sense(acb, srb); |
1232 | pci_unmap_srb(acb, srb); |
1233 | free_tag(dcb, srb); |
1234 | list_add_tail(new: &srb->list, head: &acb->srb_free_list); |
1235 | dprintkl(KERN_DEBUG, "eh_abort: Command was waiting\n" ); |
1236 | set_host_byte(cmd, status: DID_ABORT); |
1237 | return SUCCESS; |
1238 | } |
1239 | srb = find_cmd(cmd, head: &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 */ |
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(msg: ptr, period: dcb->min_nego_period, |
1269 | offset: dcb->sync_offset); |
1270 | srb->state |= SRB_DO_SYNC_NEGO; |
1271 | } |
1272 | |
1273 | |
1274 | /* WDTR */ |
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(msg: ptr, width: 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 | |
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, txt: "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 */ |
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 | **/ |
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(timer: &acb->selto_timer)) |
1564 | del_timer(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 | |
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 | |
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 | |
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, txt: "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 | |
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 | |
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, txt: "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 | */ |
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 | */ |
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(dev: &srb->dcb->acb->dev->dev, |
1817 | addr: srb->sg_bus_addr, SEGMENTX_LEN, |
1818 | dir: DMA_TO_DEVICE); |
1819 | psge->length -= xferred; |
1820 | psge->address += xferred; |
1821 | srb->sg_index = idx; |
1822 | dma_sync_single_for_device(dev: &srb->dcb->acb->dev->dev, |
1823 | addr: srb->sg_bus_addr, SEGMENTX_LEN, |
1824 | dir: 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 | */ |
1839 | static void sg_subtract_one(struct ScsiReqBlk *srb) |
1840 | { |
1841 | sg_update_list(srb, left: 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 | */ |
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, txt: "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, txt: "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 | |
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(cmd: 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, left: 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(cmd: 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, left: 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 | |
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, txt: "data_out_phase1" ); |
2018 | /* do prepare before transfer when data out phase */ |
2019 | data_io_transfer(acb, srb, XFERDATAOUT); |
2020 | } |
2021 | |
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(sg: scsi_sglist(cmd: srb->cmd), |
2126 | sg_count: srb->sg_count, offset: &offset, len: &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(virt: 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, left: 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 | |
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 | |
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(cmd: 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(sg: scsi_sglist(cmd: srb->cmd), |
2343 | sg_count: srb->sg_count, offset: &offset, len: &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(virt: 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 | |
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 | |
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 */ |
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 */ |
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 | |
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(head: &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 | |
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 */ |
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 */ |
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 | |
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 | |
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 | */ |
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(msgbuf: srb->msgin_buf, len: 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 | tag: 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 | |
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, txt: "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 | |
2831 | static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, |
2832 | u16 *pscsi_status) |
2833 | { |
2834 | } |
2835 | |
2836 | |
2837 | static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, |
2838 | u16 *pscsi_status) |
2839 | { |
2840 | } |
2841 | |
2842 | |
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 | |
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, txt: "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, txt: "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_code: DID_ABORT, cmd: srb->cmd, force: 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(list: &srb->list, head: &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 | |
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, txt: "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(list: &srb->list, head: &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 | |
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 | |
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(name: ((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 | |
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 */ |
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 */ |
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 | */ |
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, status: DID_OK); |
3165 | set_status_byte(cmd, status: 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, status: DID_BAD_TARGET); |
3223 | goto ckc_e; |
3224 | } |
3225 | dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE2\n" ); |
3226 | |
3227 | set_status_byte(cmd, status: 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(head: &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(list: &srb->list, head: &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, status: DID_NO_CONNECT); |
3257 | } else { |
3258 | srb->adapter_status = 0; |
3259 | set_host_byte(cmd, status: 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, msg: srb->end_message); |
3270 | } else if (srb->status & PARITY_ERROR) { |
3271 | set_host_byte(cmd, status: 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, sg_count: scsi_sg_count(cmd), offset: &offset, len: &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(virt: base); |
3312 | local_irq_restore(flags); |
3313 | } |
3314 | |
3315 | /* Here is the info for Doug Gilbert's sg3 ... */ |
3316 | scsi_set_resid(cmd, resid: 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(list: &srb->list, head: &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 */ |
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(entry: &srb->list); |
3356 | free_tag(dcb, srb); |
3357 | list_add_tail(new: &srb->list, head: &acb->srb_free_list); |
3358 | set_host_byte(cmd: p, status: did_flag); |
3359 | set_status_byte(cmd: p, status: 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(cmd: p); |
3366 | } |
3367 | } |
3368 | if (!list_empty(head: &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(list: &srb->list, head: &acb->srb_free_list); |
3385 | set_host_byte(cmd: p, status: did_flag); |
3386 | set_status_byte(cmd: p, status: 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(head: &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 | |
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 | |
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 | |
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(timer: &acb->waiting_timer)) |
3457 | del_timer(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, txt: "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_flag: DID_RESET, NULL, force: 1); |
3479 | /*DC395x_RecoverSRB( acb ); */ |
3480 | acb->active_dcb = NULL; |
3481 | acb->acb_flag = 0; |
3482 | waiting_process_next(acb); |
3483 | } |
3484 | } |
3485 | |
3486 | |
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(list: &srb->list, head: &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 | **/ |
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(size: 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(list: &dcb->srb_going_list); |
3556 | INIT_LIST_HEAD(list: &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(objp: 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 | **/ |
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(head: &acb->dcb_list)) |
3629 | acb->dcb_run_robin = dcb; |
3630 | |
3631 | /* add device to list */ |
3632 | list_add_tail(new: &dcb->list, head: &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 | **/ |
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(head: &acb->dcb_list, pos: 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(entry: &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 | */ |
3684 | static void adapter_remove_and_free_device(struct AdapterCtlBlk *acb, |
3685 | struct DeviceCtlBlk *dcb) |
3686 | { |
3687 | if (list_size(head: &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(objp: 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 | **/ |
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 | **/ |
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, target: scsi_device->id, lun: 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 | **/ |
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, id: scsi_device->id, lun: 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 | **/ |
3762 | static void trms1040_wait_30us(unsigned long io_port) |
3763 | { |
3764 | /* ScsiPortStallExecution(30); wait 30 us */ |
3765 | outb(value: 5, port: io_port + TRM_S1040_GEN_TIMER); |
3766 | while (!(inb(port: 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 | **/ |
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(value: send_data, port: io_port + TRM_S1040_GEN_NVRAM); |
3791 | trms1040_wait_30us(io_port); |
3792 | outb(value: (send_data | NVR_CLOCK), |
3793 | port: 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(value: send_data, port: io_port + TRM_S1040_GEN_NVRAM); |
3804 | trms1040_wait_30us(io_port); |
3805 | outb(value: (send_data | NVR_CLOCK), |
3806 | port: io_port + TRM_S1040_GEN_NVRAM); |
3807 | trms1040_wait_30us(io_port); |
3808 | } |
3809 | outb(NVR_SELECT, port: 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 | **/ |
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, cmd: 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(value: send_data, port: io_port + TRM_S1040_GEN_NVRAM); |
3839 | trms1040_wait_30us(io_port); |
3840 | outb(value: (send_data | NVR_CLOCK), port: io_port + TRM_S1040_GEN_NVRAM); |
3841 | trms1040_wait_30us(io_port); |
3842 | } |
3843 | outb(NVR_SELECT, port: io_port + TRM_S1040_GEN_NVRAM); |
3844 | trms1040_wait_30us(io_port); |
3845 | |
3846 | /* Disable chip select */ |
3847 | outb(value: 0, port: io_port + TRM_S1040_GEN_NVRAM); |
3848 | trms1040_wait_30us(io_port); |
3849 | |
3850 | outb(NVR_SELECT, port: io_port + TRM_S1040_GEN_NVRAM); |
3851 | trms1040_wait_30us(io_port); |
3852 | |
3853 | /* Wait for write ready */ |
3854 | while (1) { |
3855 | outb(value: (NVR_SELECT | NVR_CLOCK), port: io_port + TRM_S1040_GEN_NVRAM); |
3856 | trms1040_wait_30us(io_port); |
3857 | |
3858 | outb(NVR_SELECT, port: io_port + TRM_S1040_GEN_NVRAM); |
3859 | trms1040_wait_30us(io_port); |
3860 | |
3861 | if (inb(port: io_port + TRM_S1040_GEN_NVRAM) & NVR_BITIN) |
3862 | break; |
3863 | } |
3864 | |
3865 | /* Disable chip select */ |
3866 | outb(value: 0, port: 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 | **/ |
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(value: (inb(port: io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM), |
3885 | port: io_port + TRM_S1040_GEN_CONTROL); |
3886 | |
3887 | /* write enable */ |
3888 | trms1040_write_cmd(io_port, cmd: 0x04, addr: 0xFF); |
3889 | outb(value: 0, port: 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, byte: *b_eeprom); |
3895 | |
3896 | /* write disable */ |
3897 | trms1040_write_cmd(io_port, cmd: 0x04, addr: 0x00); |
3898 | outb(value: 0, port: io_port + TRM_S1040_GEN_NVRAM); |
3899 | trms1040_wait_30us(io_port); |
3900 | |
3901 | /* Disable SEEPROM */ |
3902 | outb(value: (inb(port: io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM), |
3903 | port: 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 | **/ |
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, cmd: 0x06, addr); |
3926 | |
3927 | /* read data */ |
3928 | for (i = 0; i < 8; i++) { |
3929 | outb(value: (NVR_SELECT | NVR_CLOCK), port: io_port + TRM_S1040_GEN_NVRAM); |
3930 | trms1040_wait_30us(io_port); |
3931 | outb(NVR_SELECT, port: io_port + TRM_S1040_GEN_NVRAM); |
3932 | |
3933 | /* Get data bit while falling edge */ |
3934 | read_byte = inb(port: 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(value: 0, port: 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 | **/ |
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(value: (inb(port: io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM), |
3963 | port: 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(value: (inb(port: io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM), |
3971 | port: 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 | **/ |
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 | **/ |
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 */ |
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(objp: 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 */ |
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 | **/ |
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 | **/ |
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(list: &acb->dcb_list); |
4184 | acb->dcb_run_robin = NULL; |
4185 | acb->active_dcb = NULL; |
4186 | |
4187 | INIT_LIST_HEAD(list: &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(new: &acb->srb_array[i].list, head: &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 | **/ |
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 | **/ |
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 | **/ |
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, handler: dc395x_interrupt, IRQF_SHARED, DC395X_NAME, dev: 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(eeprom: &acb->eeprom, io_port); |
4347 | print_eeprom_settings(eeprom: &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(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 | **/ |
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 | **/ |
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(timer: &acb->waiting_timer)) |
4418 | del_timer(timer: &acb->waiting_timer); |
4419 | if (timer_pending(timer: &acb->selto_timer)) |
4420 | del_timer(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 | |
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, fmt: "SCSI Host Nr %i, " , host->host_no); |
4454 | seq_printf(m, fmt: "DC395U/UW/F DC315/U %s\n" , |
4455 | (acb->config & HCC_WIDE_CARD) ? "Wide" : "" ); |
4456 | seq_printf(m, fmt: "io_port_base 0x%04lx, " , acb->io_port_base); |
4457 | seq_printf(m, fmt: "irq_level 0x%04x, " , acb->irq_level); |
4458 | seq_printf(m, fmt: " SelTimeout %ims\n" , (1638 * acb->sel_timeout) / 1000); |
4459 | |
4460 | seq_printf(m, fmt: "MaxID %i, MaxLUN %llu, " , host->max_id, host->max_lun); |
4461 | seq_printf(m, fmt: "AdapterID %i\n" , host->this_id); |
4462 | |
4463 | seq_printf(m, fmt: "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, fmt: ", FilterCfg 0x%02x" , |
4466 | DC395x_read8(acb, TRM_S1040_SCSI_CONFIG1)); |
4467 | seq_printf(m, fmt: ", DelayReset %is\n" , acb->eeprom.delay_time); |
4468 | /*seq_printf(m, "\n"); */ |
4469 | |
4470 | seq_printf(m, fmt: "Nr of DCBs: %i\n" , list_size(head: &acb->dcb_list)); |
4471 | seq_printf(m, fmt: "Map of attached LUNs: %8ph\n" , &acb->dcb_map[0]); |
4472 | seq_printf(m, fmt: " %8ph\n" , &acb->dcb_map[8]); |
4473 | |
4474 | seq_puts(m, |
4475 | s: "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, fmt: "%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, fmt: " %03i ns " , nego_period); |
4491 | else |
4492 | seq_printf(m, fmt: " (%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, fmt: " %2i.%1i M %02i " , spd, spd1, |
4499 | (dcb->sync_offset & 0x0f)); |
4500 | } else |
4501 | seq_puts(m, s: " " ); |
4502 | |
4503 | /* Add more info ... */ |
4504 | seq_printf(m, fmt: " %02i\n" , dcb->max_command); |
4505 | dev++; |
4506 | } |
4507 | |
4508 | if (timer_pending(timer: &acb->waiting_timer)) |
4509 | seq_puts(m, s: "Waiting queue timer running\n" ); |
4510 | else |
4511 | seq_putc(m, c: '\n'); |
4512 | |
4513 | list_for_each_entry(dcb, &acb->dcb_list, list) { |
4514 | struct ScsiReqBlk *srb; |
4515 | if (!list_empty(head: &dcb->srb_waiting_list)) |
4516 | seq_printf(m, fmt: "DCB (%02i-%i): Waiting: %i:" , |
4517 | dcb->target_id, dcb->target_lun, |
4518 | list_size(head: &dcb->srb_waiting_list)); |
4519 | list_for_each_entry(srb, &dcb->srb_waiting_list, list) |
4520 | seq_printf(m, fmt: " %p" , srb->cmd); |
4521 | if (!list_empty(head: &dcb->srb_going_list)) |
4522 | seq_printf(m, fmt: "\nDCB (%02i-%i): Going : %i:" , |
4523 | dcb->target_id, dcb->target_lun, |
4524 | list_size(head: &dcb->srb_going_list)); |
4525 | list_for_each_entry(srb, &dcb->srb_going_list, list) |
4526 | seq_printf(m, fmt: " %p" , srb->cmd); |
4527 | if (!list_empty(head: &dcb->srb_waiting_list) || !list_empty(head: &dcb->srb_going_list)) |
4528 | seq_putc(m, c: '\n'); |
4529 | } |
4530 | |
4531 | if (debug_enabled(DBG_1)) { |
4532 | seq_printf(m, fmt: "DCB list for ACB %p:\n" , acb); |
4533 | list_for_each_entry(dcb, &acb->dcb_list, list) { |
4534 | seq_printf(m, fmt: "%p -> " , dcb); |
4535 | } |
4536 | seq_puts(m, s: "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 | **/ |
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 | **/ |
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: 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(host: scsi_host, dev: &dev->dev)) { |
4633 | dprintkl(KERN_ERR, "scsi_add_host failed\n" ); |
4634 | goto fail; |
4635 | } |
4636 | pci_set_drvdata(pdev: dev, data: 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(t: 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 | **/ |
4657 | static void dc395x_remove_one(struct pci_dev *dev) |
4658 | { |
4659 | struct Scsi_Host *scsi_host = pci_get_drvdata(pdev: 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(t: 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 | |