2 * Device driver for the SYMBIOS/LSILOGIC 53C8XX and 53C1010 family
3 * of PCI-SCSI IO processors.
5 * Copyright (C) 1999-2001 Gerard Roudier <groudier@free.fr>
6 * Copyright (c) 2003-2005 Matthew Wilcox <matthew@wil.cx>
8 * This driver is derived from the Linux sym53c8xx driver.
9 * Copyright (C) 1998-2000 Gerard Roudier
11 * The sym53c8xx driver is derived from the ncr53c8xx driver that had been
12 * a port of the FreeBSD ncr driver to Linux-1.2.13.
14 * The original ncr driver has been written for 386bsd and FreeBSD by
15 * Wolfgang Stanglmeier <wolf@cologne.de>
16 * Stefan Esser <se@mi.Uni-Koeln.de>
17 * Copyright (C) 1994 Wolfgang Stanglmeier
19 * Other major contributions:
21 * NVRAM detection and reading.
22 * Copyright (C) 1997 Richard Waltham <dormouse@farsrobt.demon.co.uk>
24 *-----------------------------------------------------------------------------
26 * This program is free software; you can redistribute it and/or modify
27 * it under the terms of the GNU General Public License as published by
28 * the Free Software Foundation; either version 2 of the License, or
29 * (at your option) any later version.
31 * This program is distributed in the hope that it will be useful,
32 * but WITHOUT ANY WARRANTY; without even the implied warranty of
33 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
34 * GNU General Public License for more details.
36 * You should have received a copy of the GNU General Public License
37 * along with this program; if not, write to the Free Software
38 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
41 #include "sym_nvram.h"
44 #define SYM_DEBUG_GENERIC_SUPPORT
48 * Needed function prototypes.
50 static void sym_int_ma (struct sym_hcb *np);
51 static void sym_int_sir (struct sym_hcb *np);
52 static struct sym_ccb *sym_alloc_ccb(struct sym_hcb *np);
53 static struct sym_ccb *sym_ccb_from_dsa(struct sym_hcb *np, u32 dsa);
54 static void sym_alloc_lcb_tags (struct sym_hcb *np, u_char tn, u_char ln);
55 static void sym_complete_error (struct sym_hcb *np, struct sym_ccb *cp);
56 static void sym_complete_ok (struct sym_hcb *np, struct sym_ccb *cp);
57 static int sym_compute_residual(struct sym_hcb *np, struct sym_ccb *cp);
60 * Print a buffer in hexadecimal format with a ".\n" at end.
62 static void sym_printl_hex(u_char *p, int n)
70 * Print out the content of a SCSI message.
72 static int sym_show_msg (u_char * msg)
76 if (*msg==M_EXTENDED) {
78 if (i-1>msg[1]) break;
79 printf ("-%x",msg[i]);
82 } else if ((*msg & 0xf0) == 0x20) {
83 printf ("-%x",msg[1]);
89 static void sym_print_msg(struct sym_ccb *cp, char *label, u_char *msg)
91 sym_print_addr(cp->cmd, "%s: ", label);
97 static void sym_print_nego_msg(struct sym_hcb *np, int target, char *label, u_char *msg)
99 struct sym_tcb *tp = &np->target[target];
100 dev_info(&tp->starget->dev, "%s: ", label);
107 * Print something that tells about extended errors.
109 void sym_print_xerr(struct scsi_cmnd *cmd, int x_status)
111 if (x_status & XE_PARITY_ERR) {
112 sym_print_addr(cmd, "unrecovered SCSI parity error.\n");
114 if (x_status & XE_EXTRA_DATA) {
115 sym_print_addr(cmd, "extraneous data discarded.\n");
117 if (x_status & XE_BAD_PHASE) {
118 sym_print_addr(cmd, "illegal scsi phase (4/5).\n");
120 if (x_status & XE_SODL_UNRUN) {
121 sym_print_addr(cmd, "ODD transfer in DATA OUT phase.\n");
123 if (x_status & XE_SWIDE_OVRUN) {
124 sym_print_addr(cmd, "ODD transfer in DATA IN phase.\n");
129 * Return a string for SCSI BUS mode.
131 static char *sym_scsi_bus_mode(int mode)
134 case SMODE_HVD: return "HVD";
135 case SMODE_SE: return "SE";
136 case SMODE_LVD: return "LVD";
142 * Soft reset the chip.
144 * Raising SRST when the chip is running may cause
145 * problems on dual function chips (see below).
146 * On the other hand, LVD devices need some delay
147 * to settle and report actual BUS mode in STEST4.
149 static void sym_chip_reset (struct sym_hcb *np)
151 OUTB(np, nc_istat, SRST);
154 OUTB(np, nc_istat, 0);
156 udelay(2000); /* For BUS MODE to settle */
160 * Really soft reset the chip.:)
162 * Some 896 and 876 chip revisions may hang-up if we set
163 * the SRST (soft reset) bit at the wrong time when SCRIPTS
165 * So, we need to abort the current operation prior to
166 * soft resetting the chip.
168 static void sym_soft_reset (struct sym_hcb *np)
173 if (!(np->features & FE_ISTAT1) || !(INB(np, nc_istat1) & SCRUN))
176 OUTB(np, nc_istat, CABRT);
177 for (i = 100000 ; i ; --i) {
178 istat = INB(np, nc_istat);
182 else if (istat & DIP) {
183 if (INB(np, nc_dstat) & ABRT)
188 OUTB(np, nc_istat, 0);
190 printf("%s: unable to abort current chip operation, "
191 "ISTAT=0x%02x.\n", sym_name(np), istat);
197 * Start reset process.
199 * The interrupt handler will reinitialize the chip.
201 static void sym_start_reset(struct sym_hcb *np)
203 sym_reset_scsi_bus(np, 1);
206 int sym_reset_scsi_bus(struct sym_hcb *np, int enab_int)
211 sym_soft_reset(np); /* Soft reset the chip */
213 OUTW(np, nc_sien, RST);
215 * Enable Tolerant, reset IRQD if present and
216 * properly set IRQ mode, prior to resetting the bus.
218 OUTB(np, nc_stest3, TE);
219 OUTB(np, nc_dcntl, (np->rv_dcntl & IRQM));
220 OUTB(np, nc_scntl1, CRST);
224 if (!SYM_SETUP_SCSI_BUS_CHECK)
227 * Check for no terminators or SCSI bus shorts to ground.
228 * Read SCSI data bus, data parity bits and control signals.
229 * We are expecting RESET to be TRUE and other signals to be
232 term = INB(np, nc_sstat0);
233 term = ((term & 2) << 7) + ((term & 1) << 17); /* rst sdp0 */
234 term |= ((INB(np, nc_sstat2) & 0x01) << 26) | /* sdp1 */
235 ((INW(np, nc_sbdl) & 0xff) << 9) | /* d7-0 */
236 ((INW(np, nc_sbdl) & 0xff00) << 10) | /* d15-8 */
237 INB(np, nc_sbcl); /* req ack bsy sel atn msg cd io */
242 if (term != (2<<7)) {
243 printf("%s: suspicious SCSI data while resetting the BUS.\n",
245 printf("%s: %sdp0,d7-0,rst,req,ack,bsy,sel,atn,msg,c/d,i/o = "
246 "0x%lx, expecting 0x%lx\n",
248 (np->features & FE_WIDE) ? "dp1,d15-8," : "",
249 (u_long)term, (u_long)(2<<7));
250 if (SYM_SETUP_SCSI_BUS_CHECK == 1)
254 OUTB(np, nc_scntl1, 0);
259 * Select SCSI clock frequency
261 static void sym_selectclock(struct sym_hcb *np, u_char scntl3)
264 * If multiplier not present or not selected, leave here.
266 if (np->multiplier <= 1) {
267 OUTB(np, nc_scntl3, scntl3);
271 if (sym_verbose >= 2)
272 printf ("%s: enabling clock multiplier\n", sym_name(np));
274 OUTB(np, nc_stest1, DBLEN); /* Enable clock multiplier */
276 * Wait for the LCKFRQ bit to be set if supported by the chip.
277 * Otherwise wait 50 micro-seconds (at least).
279 if (np->features & FE_LCKFRQ) {
281 while (!(INB(np, nc_stest4) & LCKFRQ) && --i > 0)
284 printf("%s: the chip cannot lock the frequency\n",
290 OUTB(np, nc_stest3, HSC); /* Halt the scsi clock */
291 OUTB(np, nc_scntl3, scntl3);
292 OUTB(np, nc_stest1, (DBLEN|DBLSEL));/* Select clock multiplier */
293 OUTB(np, nc_stest3, 0x00); /* Restart scsi clock */
298 * Determine the chip's clock frequency.
300 * This is essential for the negotiation of the synchronous
303 * Note: we have to return the correct value.
304 * THERE IS NO SAFE DEFAULT VALUE.
306 * Most NCR/SYMBIOS boards are delivered with a 40 Mhz clock.
307 * 53C860 and 53C875 rev. 1 support fast20 transfers but
308 * do not have a clock doubler and so are provided with a
309 * 80 MHz clock. All other fast20 boards incorporate a doubler
310 * and so should be delivered with a 40 MHz clock.
311 * The recent fast40 chips (895/896/895A/1010) use a 40 Mhz base
312 * clock and provide a clock quadrupler (160 Mhz).
316 * calculate SCSI clock frequency (in KHz)
318 static unsigned getfreq (struct sym_hcb *np, int gen)
324 * Measure GEN timer delay in order
325 * to calculate SCSI clock frequency
327 * This code will never execute too
328 * many loop iterations (if DELAY is
329 * reasonably correct). It could get
330 * too low a delay (too high a freq.)
331 * if the CPU is slow executing the
332 * loop for some reason (an NMI, for
333 * example). For this reason we will
334 * if multiple measurements are to be
335 * performed trust the higher delay
336 * (lower frequency returned).
338 OUTW(np, nc_sien, 0); /* mask all scsi interrupts */
339 INW(np, nc_sist); /* clear pending scsi interrupt */
340 OUTB(np, nc_dien, 0); /* mask all dma interrupts */
341 INW(np, nc_sist); /* another one, just to be sure :) */
343 * The C1010-33 core does not report GEN in SIST,
344 * if this interrupt is masked in SIEN.
345 * I don't know yet if the C1010-66 behaves the same way.
347 if (np->features & FE_C10) {
348 OUTW(np, nc_sien, GEN);
349 OUTB(np, nc_istat1, SIRQD);
351 OUTB(np, nc_scntl3, 4); /* set pre-scaler to divide by 3 */
352 OUTB(np, nc_stime1, 0); /* disable general purpose timer */
353 OUTB(np, nc_stime1, gen); /* set to nominal delay of 1<<gen * 125us */
354 while (!(INW(np, nc_sist) & GEN) && ms++ < 100000)
355 udelay(1000/4); /* count in 1/4 of ms */
356 OUTB(np, nc_stime1, 0); /* disable general purpose timer */
358 * Undo C1010-33 specific settings.
360 if (np->features & FE_C10) {
361 OUTW(np, nc_sien, 0);
362 OUTB(np, nc_istat1, 0);
365 * set prescaler to divide by whatever 0 means
366 * 0 ought to choose divide by 2, but appears
367 * to set divide by 3.5 mode in my 53c810 ...
369 OUTB(np, nc_scntl3, 0);
372 * adjust for prescaler, and convert into KHz
374 f = ms ? ((1 << gen) * (4340*4)) / ms : 0;
377 * The C1010-33 result is biased by a factor
378 * of 2/3 compared to earlier chips.
380 if (np->features & FE_C10)
383 if (sym_verbose >= 2)
384 printf ("%s: Delay (GEN=%d): %u msec, %u KHz\n",
385 sym_name(np), gen, ms/4, f);
390 static unsigned sym_getfreq (struct sym_hcb *np)
395 getfreq (np, gen); /* throw away first result */
396 f1 = getfreq (np, gen);
397 f2 = getfreq (np, gen);
398 if (f1 > f2) f1 = f2; /* trust lower result */
403 * Get/probe chip SCSI clock frequency
405 static void sym_getclock (struct sym_hcb *np, int mult)
407 unsigned char scntl3 = np->sv_scntl3;
408 unsigned char stest1 = np->sv_stest1;
414 * True with 875/895/896/895A with clock multiplier selected
416 if (mult > 1 && (stest1 & (DBLEN+DBLSEL)) == DBLEN+DBLSEL) {
417 if (sym_verbose >= 2)
418 printf ("%s: clock multiplier found\n", sym_name(np));
419 np->multiplier = mult;
423 * If multiplier not found or scntl3 not 7,5,3,
424 * reset chip and get frequency from general purpose timer.
425 * Otherwise trust scntl3 BIOS setting.
427 if (np->multiplier != mult || (scntl3 & 7) < 3 || !(scntl3 & 1)) {
428 OUTB(np, nc_stest1, 0); /* make sure doubler is OFF */
429 f1 = sym_getfreq (np);
432 printf ("%s: chip clock is %uKHz\n", sym_name(np), f1);
434 if (f1 < 45000) f1 = 40000;
435 else if (f1 < 55000) f1 = 50000;
438 if (f1 < 80000 && mult > 1) {
439 if (sym_verbose >= 2)
440 printf ("%s: clock multiplier assumed\n",
442 np->multiplier = mult;
445 if ((scntl3 & 7) == 3) f1 = 40000;
446 else if ((scntl3 & 7) == 5) f1 = 80000;
449 f1 /= np->multiplier;
453 * Compute controller synchronous parameters.
455 f1 *= np->multiplier;
460 * Get/probe PCI clock frequency
462 static int sym_getpciclock (struct sym_hcb *np)
467 * For now, we only need to know about the actual
468 * PCI BUS clock frequency for C1010-66 chips.
471 if (np->features & FE_66MHZ) {
475 OUTB(np, nc_stest1, SCLK); /* Use the PCI clock as SCSI clock */
477 OUTB(np, nc_stest1, 0);
485 * SYMBIOS chip clock divisor table.
487 * Divisors are multiplied by 10,000,000 in order to make
488 * calculations more simple.
491 static u32 div_10M[] = {2*_5M, 3*_5M, 4*_5M, 6*_5M, 8*_5M, 12*_5M, 16*_5M};
494 * Get clock factor and sync divisor for a given
495 * synchronous factor period.
498 sym_getsync(struct sym_hcb *np, u_char dt, u_char sfac, u_char *divp, u_char *fakp)
500 u32 clk = np->clock_khz; /* SCSI clock frequency in kHz */
501 int div = np->clock_divn; /* Number of divisors supported */
502 u32 fak; /* Sync factor in sxfer */
503 u32 per; /* Period in tenths of ns */
504 u32 kpc; /* (per * clk) */
508 * Compute the synchronous period in tenths of nano-seconds
510 if (dt && sfac <= 9) per = 125;
511 else if (sfac <= 10) per = 250;
512 else if (sfac == 11) per = 303;
513 else if (sfac == 12) per = 500;
514 else per = 40 * sfac;
522 * For earliest C10 revision 0, we cannot use extra
523 * clocks for the setting of the SCSI clocking.
524 * Note that this limits the lowest sync data transfer
525 * to 5 Mega-transfers per second and may result in
526 * using higher clock divisors.
529 if ((np->features & (FE_C10|FE_U3EN)) == FE_C10) {
531 * Look for the lowest clock divisor that allows an
532 * output speed not faster than the period.
536 if (kpc > (div_10M[div] << 2)) {
541 fak = 0; /* No extra clocks */
542 if (div == np->clock_divn) { /* Are we too fast ? */
552 * Look for the greatest clock divisor that allows an
553 * input speed faster than the period.
556 if (kpc >= (div_10M[div] << 2)) break;
559 * Calculate the lowest clock factor that allows an output
560 * speed not faster than the period, and the max output speed.
561 * If fak >= 1 we will set both XCLKH_ST and XCLKH_DT.
562 * If fak >= 2 we will also set XCLKS_ST and XCLKS_DT.
565 fak = (kpc - 1) / (div_10M[div] << 1) + 1 - 2;
566 /* ret = ((2+fak)*div_10M[div])/np->clock_khz; */
568 fak = (kpc - 1) / div_10M[div] + 1 - 4;
569 /* ret = ((4+fak)*div_10M[div])/np->clock_khz; */
573 * Check against our hardware limits, or bugs :).
581 * Compute and return sync parameters.
590 * SYMBIOS chips allow burst lengths of 2, 4, 8, 16, 32, 64,
591 * 128 transfers. All chips support at least 16 transfers
592 * bursts. The 825A, 875 and 895 chips support bursts of up
593 * to 128 transfers and the 895A and 896 support bursts of up
594 * to 64 transfers. All other chips support up to 16
597 * For PCI 32 bit data transfers each transfer is a DWORD.
598 * It is a QUADWORD (8 bytes) for PCI 64 bit data transfers.
600 * We use log base 2 (burst length) as internal code, with
601 * value 0 meaning "burst disabled".
605 * Burst length from burst code.
607 #define burst_length(bc) (!(bc))? 0 : 1 << (bc)
610 * Burst code from io register bits.
612 #define burst_code(dmode, ctest4, ctest5) \
613 (ctest4) & 0x80? 0 : (((dmode) & 0xc0) >> 6) + ((ctest5) & 0x04) + 1
616 * Set initial io register bits from burst code.
618 static __inline void sym_init_burst(struct sym_hcb *np, u_char bc)
620 np->rv_ctest4 &= ~0x80;
621 np->rv_dmode &= ~(0x3 << 6);
622 np->rv_ctest5 &= ~0x4;
625 np->rv_ctest4 |= 0x80;
629 np->rv_dmode |= ((bc & 0x3) << 6);
630 np->rv_ctest5 |= (bc & 0x4);
636 * Print out the list of targets that have some flag disabled by user.
638 static void sym_print_targets_flag(struct sym_hcb *np, int mask, char *msg)
643 for (cnt = 0, i = 0 ; i < SYM_CONF_MAX_TARGET ; i++) {
646 if (np->target[i].usrflags & mask) {
648 printf("%s: %s disabled for targets",
658 * Save initial settings of some IO registers.
659 * Assumed to have been set by BIOS.
660 * We cannot reset the chip prior to reading the
661 * IO registers, since informations will be lost.
662 * Since the SCRIPTS processor may be running, this
663 * is not safe on paper, but it seems to work quite
666 static void sym_save_initial_setting (struct sym_hcb *np)
668 np->sv_scntl0 = INB(np, nc_scntl0) & 0x0a;
669 np->sv_scntl3 = INB(np, nc_scntl3) & 0x07;
670 np->sv_dmode = INB(np, nc_dmode) & 0xce;
671 np->sv_dcntl = INB(np, nc_dcntl) & 0xa8;
672 np->sv_ctest3 = INB(np, nc_ctest3) & 0x01;
673 np->sv_ctest4 = INB(np, nc_ctest4) & 0x80;
674 np->sv_gpcntl = INB(np, nc_gpcntl);
675 np->sv_stest1 = INB(np, nc_stest1);
676 np->sv_stest2 = INB(np, nc_stest2) & 0x20;
677 np->sv_stest4 = INB(np, nc_stest4);
678 if (np->features & FE_C10) { /* Always large DMA fifo + ultra3 */
679 np->sv_scntl4 = INB(np, nc_scntl4);
680 np->sv_ctest5 = INB(np, nc_ctest5) & 0x04;
683 np->sv_ctest5 = INB(np, nc_ctest5) & 0x24;
687 * Prepare io register values used by sym_start_up()
688 * according to selected and supported features.
690 static int sym_prepare_setting(struct Scsi_Host *shost, struct sym_hcb *np, struct sym_nvram *nvram)
699 np->maxwide = (np->features & FE_WIDE)? 1 : 0;
702 * Guess the frequency of the chip's clock.
704 if (np->features & (FE_ULTRA3 | FE_ULTRA2))
705 np->clock_khz = 160000;
706 else if (np->features & FE_ULTRA)
707 np->clock_khz = 80000;
709 np->clock_khz = 40000;
712 * Get the clock multiplier factor.
714 if (np->features & FE_QUAD)
716 else if (np->features & FE_DBLR)
722 * Measure SCSI clock frequency for chips
723 * it may vary from assumed one.
725 if (np->features & FE_VARCLK)
726 sym_getclock(np, np->multiplier);
729 * Divisor to be used for async (timer pre-scaler).
731 i = np->clock_divn - 1;
733 if (10ul * SYM_CONF_MIN_ASYNC * np->clock_khz > div_10M[i]) {
741 * The C1010 uses hardwired divisors for async.
742 * So, we just throw away, the async. divisor.:-)
744 if (np->features & FE_C10)
748 * Minimum synchronous period factor supported by the chip.
749 * Btw, 'period' is in tenths of nanoseconds.
751 period = (4 * div_10M[0] + np->clock_khz - 1) / np->clock_khz;
753 if (period <= 250) np->minsync = 10;
754 else if (period <= 303) np->minsync = 11;
755 else if (period <= 500) np->minsync = 12;
756 else np->minsync = (period + 40 - 1) / 40;
759 * Check against chip SCSI standard support (SCSI-2,ULTRA,ULTRA2).
761 if (np->minsync < 25 &&
762 !(np->features & (FE_ULTRA|FE_ULTRA2|FE_ULTRA3)))
764 else if (np->minsync < 12 &&
765 !(np->features & (FE_ULTRA2|FE_ULTRA3)))
769 * Maximum synchronous period factor supported by the chip.
771 period = (11 * div_10M[np->clock_divn - 1]) / (4 * np->clock_khz);
772 np->maxsync = period > 2540 ? 254 : period / 10;
775 * If chip is a C1010, guess the sync limits in DT mode.
777 if ((np->features & (FE_C10|FE_ULTRA3)) == (FE_C10|FE_ULTRA3)) {
778 if (np->clock_khz == 160000) {
781 np->maxoffs_dt = nvram->type ? 62 : 31;
786 * 64 bit addressing (895A/896/1010) ?
788 if (np->features & FE_DAC) {
789 #if SYM_CONF_DMA_ADDRESSING_MODE == 0
790 np->rv_ccntl1 |= (DDAC);
791 #elif SYM_CONF_DMA_ADDRESSING_MODE == 1
793 np->rv_ccntl1 |= (DDAC);
795 np->rv_ccntl1 |= (XTIMOD | EXTIBMV);
796 #elif SYM_CONF_DMA_ADDRESSING_MODE == 2
798 np->rv_ccntl1 |= (DDAC);
800 np->rv_ccntl1 |= (0 | EXTIBMV);
805 * Phase mismatch handled by SCRIPTS (895A/896/1010) ?
807 if (np->features & FE_NOPM)
808 np->rv_ccntl0 |= (ENPMJ);
811 * C1010-33 Errata: Part Number:609-039638 (rev. 1) is fixed.
812 * In dual channel mode, contention occurs if internal cycles
813 * are used. Disable internal cycles.
815 if (np->device_id == PCI_DEVICE_ID_LSI_53C1010_33 &&
816 np->revision_id < 0x1)
817 np->rv_ccntl0 |= DILS;
820 * Select burst length (dwords)
822 burst_max = SYM_SETUP_BURST_ORDER;
823 if (burst_max == 255)
824 burst_max = burst_code(np->sv_dmode, np->sv_ctest4,
828 if (burst_max > np->maxburst)
829 burst_max = np->maxburst;
832 * DEL 352 - 53C810 Rev x11 - Part Number 609-0392140 - ITEM 2.
833 * This chip and the 860 Rev 1 may wrongly use PCI cache line
834 * based transactions on LOAD/STORE instructions. So we have
835 * to prevent these chips from using such PCI transactions in
836 * this driver. The generic ncr driver that does not use
837 * LOAD/STORE instructions does not need this work-around.
839 if ((np->device_id == PCI_DEVICE_ID_NCR_53C810 &&
840 np->revision_id >= 0x10 && np->revision_id <= 0x11) ||
841 (np->device_id == PCI_DEVICE_ID_NCR_53C860 &&
842 np->revision_id <= 0x1))
843 np->features &= ~(FE_WRIE|FE_ERL|FE_ERMP);
846 * Select all supported special features.
847 * If we are using on-board RAM for scripts, prefetch (PFEN)
848 * does not help, but burst op fetch (BOF) does.
849 * Disabling PFEN makes sure BOF will be used.
851 if (np->features & FE_ERL)
852 np->rv_dmode |= ERL; /* Enable Read Line */
853 if (np->features & FE_BOF)
854 np->rv_dmode |= BOF; /* Burst Opcode Fetch */
855 if (np->features & FE_ERMP)
856 np->rv_dmode |= ERMP; /* Enable Read Multiple */
858 if ((np->features & FE_PFEN) && !np->ram_ba)
860 if (np->features & FE_PFEN)
862 np->rv_dcntl |= PFEN; /* Prefetch Enable */
863 if (np->features & FE_CLSE)
864 np->rv_dcntl |= CLSE; /* Cache Line Size Enable */
865 if (np->features & FE_WRIE)
866 np->rv_ctest3 |= WRIE; /* Write and Invalidate */
867 if (np->features & FE_DFS)
868 np->rv_ctest5 |= DFS; /* Dma Fifo Size */
873 np->rv_ctest4 |= MPEE; /* Master parity checking */
874 np->rv_scntl0 |= 0x0a; /* full arb., ena parity, par->ATN */
877 * Get parity checking, host ID and verbose mode from NVRAM
880 sym_nvram_setup_host(shost, np, nvram);
883 * Get SCSI addr of host adapter (set by bios?).
885 if (np->myaddr == 255) {
886 np->myaddr = INB(np, nc_scid) & 0x07;
888 np->myaddr = SYM_SETUP_HOST_ID;
892 * Prepare initial io register bits for burst length
894 sym_init_burst(np, burst_max);
898 * - LVD capable chips (895/895A/896/1010) report the
899 * current BUS mode through the STEST4 IO register.
900 * - For previous generation chips (825/825A/875),
901 * user has to tell us how to check against HVD,
902 * since a 100% safe algorithm is not possible.
904 np->scsi_mode = SMODE_SE;
905 if (np->features & (FE_ULTRA2|FE_ULTRA3))
906 np->scsi_mode = (np->sv_stest4 & SMODE);
907 else if (np->features & FE_DIFF) {
908 if (SYM_SETUP_SCSI_DIFF == 1) {
910 if (np->sv_stest2 & 0x20)
911 np->scsi_mode = SMODE_HVD;
913 else if (nvram->type == SYM_SYMBIOS_NVRAM) {
914 if (!(INB(np, nc_gpreg) & 0x08))
915 np->scsi_mode = SMODE_HVD;
918 else if (SYM_SETUP_SCSI_DIFF == 2)
919 np->scsi_mode = SMODE_HVD;
921 if (np->scsi_mode == SMODE_HVD)
922 np->rv_stest2 |= 0x20;
925 * Set LED support from SCRIPTS.
926 * Ignore this feature for boards known to use a
927 * specific GPIO wiring and for the 895A, 896
928 * and 1010 that drive the LED directly.
930 if ((SYM_SETUP_SCSI_LED ||
931 (nvram->type == SYM_SYMBIOS_NVRAM ||
932 (nvram->type == SYM_TEKRAM_NVRAM &&
933 np->device_id == PCI_DEVICE_ID_NCR_53C895))) &&
934 !(np->features & FE_LEDC) && !(np->sv_gpcntl & 0x01))
935 np->features |= FE_LED0;
940 switch(SYM_SETUP_IRQ_MODE & 3) {
942 np->rv_dcntl |= IRQM;
945 np->rv_dcntl |= (np->sv_dcntl & IRQM);
952 * Configure targets according to driver setup.
953 * If NVRAM present get targets setup from NVRAM.
955 for (i = 0 ; i < SYM_CONF_MAX_TARGET ; i++) {
956 struct sym_tcb *tp = &np->target[i];
958 tp->usrflags |= (SYM_DISC_ENABLED | SYM_TAGS_ENABLED);
959 tp->usrtags = SYM_SETUP_MAX_TAG;
961 sym_nvram_setup_target(np, i, nvram);
964 tp->usrflags &= ~SYM_TAGS_ENABLED;
968 * Let user know about the settings.
970 printf("%s: %s, ID %d, Fast-%d, %s, %s\n", sym_name(np),
971 sym_nvram_type(nvram), np->myaddr,
972 (np->features & FE_ULTRA3) ? 80 :
973 (np->features & FE_ULTRA2) ? 40 :
974 (np->features & FE_ULTRA) ? 20 : 10,
975 sym_scsi_bus_mode(np->scsi_mode),
976 (np->rv_scntl0 & 0xa) ? "parity checking" : "NO parity");
978 * Tell him more on demand.
981 printf("%s: %s IRQ line driver%s\n",
983 np->rv_dcntl & IRQM ? "totem pole" : "open drain",
984 np->ram_ba ? ", using on-chip SRAM" : "");
985 printf("%s: using %s firmware.\n", sym_name(np), np->fw_name);
986 if (np->features & FE_NOPM)
987 printf("%s: handling phase mismatch from SCRIPTS.\n",
993 if (sym_verbose >= 2) {
994 printf ("%s: initial SCNTL3/DMODE/DCNTL/CTEST3/4/5 = "
995 "(hex) %02x/%02x/%02x/%02x/%02x/%02x\n",
996 sym_name(np), np->sv_scntl3, np->sv_dmode, np->sv_dcntl,
997 np->sv_ctest3, np->sv_ctest4, np->sv_ctest5);
999 printf ("%s: final SCNTL3/DMODE/DCNTL/CTEST3/4/5 = "
1000 "(hex) %02x/%02x/%02x/%02x/%02x/%02x\n",
1001 sym_name(np), np->rv_scntl3, np->rv_dmode, np->rv_dcntl,
1002 np->rv_ctest3, np->rv_ctest4, np->rv_ctest5);
1005 * Let user be aware of targets that have some disable flags set.
1007 sym_print_targets_flag(np, SYM_SCAN_BOOT_DISABLED, "SCAN AT BOOT");
1009 sym_print_targets_flag(np, SYM_SCAN_LUNS_DISABLED,
1016 * Test the pci bus snoop logic :-(
1018 * Has to be called with interrupts disabled.
1020 #ifndef CONFIG_SCSI_SYM53C8XX_IOMAPPED
1021 static int sym_regtest (struct sym_hcb *np)
1023 register volatile u32 data;
1025 * chip registers may NOT be cached.
1026 * write 0xffffffff to a read only register area,
1027 * and try to read it back.
1030 OUTL(np, nc_dstat, data);
1031 data = INL(np, nc_dstat);
1033 if (data == 0xffffffff) {
1035 if ((data & 0xe2f0fffd) != 0x02000080) {
1037 printf ("CACHE TEST FAILED: reg dstat-sstat2 readback %x.\n",
1045 static int sym_snooptest (struct sym_hcb *np)
1047 u32 sym_rd, sym_wr, sym_bk, host_rd, host_wr, pc, dstat;
1049 #ifndef CONFIG_SCSI_SYM53C8XX_IOMAPPED
1050 err |= sym_regtest (np);
1051 if (err) return (err);
1055 * Enable Master Parity Checking as we intend
1056 * to enable it for normal operations.
1058 OUTB(np, nc_ctest4, (np->rv_ctest4 & MPEE));
1062 pc = SCRIPTZ_BA(np, snooptest);
1066 * Set memory and register.
1068 np->scratch = cpu_to_scr(host_wr);
1069 OUTL(np, nc_temp, sym_wr);
1071 * Start script (exchange values)
1073 OUTL(np, nc_dsa, np->hcb_ba);
1076 * Wait 'til done (with timeout)
1078 for (i=0; i<SYM_SNOOP_TIMEOUT; i++)
1079 if (INB(np, nc_istat) & (INTF|SIP|DIP))
1081 if (i>=SYM_SNOOP_TIMEOUT) {
1082 printf ("CACHE TEST FAILED: timeout.\n");
1086 * Check for fatal DMA errors.
1088 dstat = INB(np, nc_dstat);
1089 #if 1 /* Band aiding for broken hardwares that fail PCI parity */
1090 if ((dstat & MDPE) && (np->rv_ctest4 & MPEE)) {
1091 printf ("%s: PCI DATA PARITY ERROR DETECTED - "
1092 "DISABLING MASTER DATA PARITY CHECKING.\n",
1094 np->rv_ctest4 &= ~MPEE;
1098 if (dstat & (MDPE|BF|IID)) {
1099 printf ("CACHE TEST FAILED: DMA error (dstat=0x%02x).", dstat);
1103 * Save termination position.
1105 pc = INL(np, nc_dsp);
1107 * Read memory and register.
1109 host_rd = scr_to_cpu(np->scratch);
1110 sym_rd = INL(np, nc_scratcha);
1111 sym_bk = INL(np, nc_temp);
1113 * Check termination position.
1115 if (pc != SCRIPTZ_BA(np, snoopend)+8) {
1116 printf ("CACHE TEST FAILED: script execution failed.\n");
1117 printf ("start=%08lx, pc=%08lx, end=%08lx\n",
1118 (u_long) SCRIPTZ_BA(np, snooptest), (u_long) pc,
1119 (u_long) SCRIPTZ_BA(np, snoopend) +8);
1125 if (host_wr != sym_rd) {
1126 printf ("CACHE TEST FAILED: host wrote %d, chip read %d.\n",
1127 (int) host_wr, (int) sym_rd);
1130 if (host_rd != sym_wr) {
1131 printf ("CACHE TEST FAILED: chip wrote %d, host read %d.\n",
1132 (int) sym_wr, (int) host_rd);
1135 if (sym_bk != sym_wr) {
1136 printf ("CACHE TEST FAILED: chip wrote %d, read back %d.\n",
1137 (int) sym_wr, (int) sym_bk);
1145 * log message for real hard errors
1147 * sym0 targ 0?: ERROR (ds:si) (so-si-sd) (sx/s3/s4) @ name (dsp:dbc).
1148 * reg: r0 r1 r2 r3 r4 r5 r6 ..... rf.
1150 * exception register:
1155 * so: control lines as driven by chip.
1156 * si: control lines as seen by chip.
1157 * sd: scsi data lines as seen by chip.
1160 * sx: sxfer (see the manual)
1161 * s3: scntl3 (see the manual)
1162 * s4: scntl4 (see the manual)
1164 * current script command:
1165 * dsp: script address (relative to start of script).
1166 * dbc: first word of script command.
1168 * First 24 register of the chip:
1171 static void sym_log_hard_error(struct sym_hcb *np, u_short sist, u_char dstat)
1177 u_char *script_base;
1180 dsp = INL(np, nc_dsp);
1182 if (dsp > np->scripta_ba &&
1183 dsp <= np->scripta_ba + np->scripta_sz) {
1184 script_ofs = dsp - np->scripta_ba;
1185 script_size = np->scripta_sz;
1186 script_base = (u_char *) np->scripta0;
1187 script_name = "scripta";
1189 else if (np->scriptb_ba < dsp &&
1190 dsp <= np->scriptb_ba + np->scriptb_sz) {
1191 script_ofs = dsp - np->scriptb_ba;
1192 script_size = np->scriptb_sz;
1193 script_base = (u_char *) np->scriptb0;
1194 script_name = "scriptb";
1199 script_name = "mem";
1202 printf ("%s:%d: ERROR (%x:%x) (%x-%x-%x) (%x/%x/%x) @ (%s %x:%08x).\n",
1203 sym_name(np), (unsigned)INB(np, nc_sdid)&0x0f, dstat, sist,
1204 (unsigned)INB(np, nc_socl), (unsigned)INB(np, nc_sbcl),
1205 (unsigned)INB(np, nc_sbdl), (unsigned)INB(np, nc_sxfer),
1206 (unsigned)INB(np, nc_scntl3),
1207 (np->features & FE_C10) ? (unsigned)INB(np, nc_scntl4) : 0,
1208 script_name, script_ofs, (unsigned)INL(np, nc_dbc));
1210 if (((script_ofs & 3) == 0) &&
1211 (unsigned)script_ofs < script_size) {
1212 printf ("%s: script cmd = %08x\n", sym_name(np),
1213 scr_to_cpu((int) *(u32 *)(script_base + script_ofs)));
1216 printf ("%s: regdump:", sym_name(np));
1218 printf (" %02x", (unsigned)INB_OFF(np, i));
1224 if (dstat & (MDPE|BF))
1225 sym_log_bus_error(np);
1228 static struct sym_chip sym_dev_table[] = {
1229 {PCI_DEVICE_ID_NCR_53C810, 0x0f, "810", 4, 8, 4, 64,
1232 #ifdef SYM_DEBUG_GENERIC_SUPPORT
1233 {PCI_DEVICE_ID_NCR_53C810, 0xff, "810a", 4, 8, 4, 1,
1237 {PCI_DEVICE_ID_NCR_53C810, 0xff, "810a", 4, 8, 4, 1,
1238 FE_CACHE_SET|FE_LDSTR|FE_PFEN|FE_BOF}
1241 {PCI_DEVICE_ID_NCR_53C815, 0xff, "815", 4, 8, 4, 64,
1244 {PCI_DEVICE_ID_NCR_53C825, 0x0f, "825", 6, 8, 4, 64,
1245 FE_WIDE|FE_BOF|FE_ERL|FE_DIFF}
1247 {PCI_DEVICE_ID_NCR_53C825, 0xff, "825a", 6, 8, 4, 2,
1248 FE_WIDE|FE_CACHE0_SET|FE_BOF|FE_DFS|FE_LDSTR|FE_PFEN|FE_RAM|FE_DIFF}
1250 {PCI_DEVICE_ID_NCR_53C860, 0xff, "860", 4, 8, 5, 1,
1251 FE_ULTRA|FE_CACHE_SET|FE_BOF|FE_LDSTR|FE_PFEN}
1253 {PCI_DEVICE_ID_NCR_53C875, 0x01, "875", 6, 16, 5, 2,
1254 FE_WIDE|FE_ULTRA|FE_CACHE0_SET|FE_BOF|FE_DFS|FE_LDSTR|FE_PFEN|
1255 FE_RAM|FE_DIFF|FE_VARCLK}
1257 {PCI_DEVICE_ID_NCR_53C875, 0xff, "875", 6, 16, 5, 2,
1258 FE_WIDE|FE_ULTRA|FE_DBLR|FE_CACHE0_SET|FE_BOF|FE_DFS|FE_LDSTR|FE_PFEN|
1259 FE_RAM|FE_DIFF|FE_VARCLK}
1261 {PCI_DEVICE_ID_NCR_53C875J, 0xff, "875J", 6, 16, 5, 2,
1262 FE_WIDE|FE_ULTRA|FE_DBLR|FE_CACHE0_SET|FE_BOF|FE_DFS|FE_LDSTR|FE_PFEN|
1263 FE_RAM|FE_DIFF|FE_VARCLK}
1265 {PCI_DEVICE_ID_NCR_53C885, 0xff, "885", 6, 16, 5, 2,
1266 FE_WIDE|FE_ULTRA|FE_DBLR|FE_CACHE0_SET|FE_BOF|FE_DFS|FE_LDSTR|FE_PFEN|
1267 FE_RAM|FE_DIFF|FE_VARCLK}
1269 #ifdef SYM_DEBUG_GENERIC_SUPPORT
1270 {PCI_DEVICE_ID_NCR_53C895, 0xff, "895", 6, 31, 7, 2,
1271 FE_WIDE|FE_ULTRA2|FE_QUAD|FE_CACHE_SET|FE_BOF|FE_DFS|
1275 {PCI_DEVICE_ID_NCR_53C895, 0xff, "895", 6, 31, 7, 2,
1276 FE_WIDE|FE_ULTRA2|FE_QUAD|FE_CACHE_SET|FE_BOF|FE_DFS|FE_LDSTR|FE_PFEN|
1280 {PCI_DEVICE_ID_NCR_53C896, 0xff, "896", 6, 31, 7, 4,
1281 FE_WIDE|FE_ULTRA2|FE_QUAD|FE_CACHE_SET|FE_BOF|FE_DFS|FE_LDSTR|FE_PFEN|
1282 FE_RAM|FE_RAM8K|FE_64BIT|FE_DAC|FE_IO256|FE_NOPM|FE_LEDC|FE_LCKFRQ}
1284 {PCI_DEVICE_ID_LSI_53C895A, 0xff, "895a", 6, 31, 7, 4,
1285 FE_WIDE|FE_ULTRA2|FE_QUAD|FE_CACHE_SET|FE_BOF|FE_DFS|FE_LDSTR|FE_PFEN|
1286 FE_RAM|FE_RAM8K|FE_DAC|FE_IO256|FE_NOPM|FE_LEDC|FE_LCKFRQ}
1288 {PCI_DEVICE_ID_LSI_53C875A, 0xff, "875a", 6, 31, 7, 4,
1289 FE_WIDE|FE_ULTRA|FE_QUAD|FE_CACHE_SET|FE_BOF|FE_DFS|FE_LDSTR|FE_PFEN|
1290 FE_RAM|FE_DAC|FE_IO256|FE_NOPM|FE_LEDC|FE_LCKFRQ}
1292 {PCI_DEVICE_ID_LSI_53C1010_33, 0x00, "1010-33", 6, 31, 7, 8,
1293 FE_WIDE|FE_ULTRA3|FE_QUAD|FE_CACHE_SET|FE_BOF|FE_DFBC|FE_LDSTR|FE_PFEN|
1294 FE_RAM|FE_RAM8K|FE_64BIT|FE_DAC|FE_IO256|FE_NOPM|FE_LEDC|FE_CRC|
1297 {PCI_DEVICE_ID_LSI_53C1010_33, 0xff, "1010-33", 6, 31, 7, 8,
1298 FE_WIDE|FE_ULTRA3|FE_QUAD|FE_CACHE_SET|FE_BOF|FE_DFBC|FE_LDSTR|FE_PFEN|
1299 FE_RAM|FE_RAM8K|FE_64BIT|FE_DAC|FE_IO256|FE_NOPM|FE_LEDC|FE_CRC|
1302 {PCI_DEVICE_ID_LSI_53C1010_66, 0xff, "1010-66", 6, 31, 7, 8,
1303 FE_WIDE|FE_ULTRA3|FE_QUAD|FE_CACHE_SET|FE_BOF|FE_DFBC|FE_LDSTR|FE_PFEN|
1304 FE_RAM|FE_RAM8K|FE_64BIT|FE_DAC|FE_IO256|FE_NOPM|FE_LEDC|FE_66MHZ|FE_CRC|
1307 {PCI_DEVICE_ID_LSI_53C1510, 0xff, "1510d", 6, 31, 7, 4,
1308 FE_WIDE|FE_ULTRA2|FE_QUAD|FE_CACHE_SET|FE_BOF|FE_DFS|FE_LDSTR|FE_PFEN|
1309 FE_RAM|FE_IO256|FE_LEDC}
1312 #define sym_num_devs \
1313 (sizeof(sym_dev_table) / sizeof(sym_dev_table[0]))
1316 * Look up the chip table.
1318 * Return a pointer to the chip entry if found,
1322 sym_lookup_chip_table (u_short device_id, u_char revision)
1324 struct sym_chip *chip;
1327 for (i = 0; i < sym_num_devs; i++) {
1328 chip = &sym_dev_table[i];
1329 if (device_id != chip->device_id)
1331 if (revision > chip->revision_id)
1339 #if SYM_CONF_DMA_ADDRESSING_MODE == 2
1341 * Lookup the 64 bit DMA segments map.
1342 * This is only used if the direct mapping
1343 * has been unsuccessful.
1345 int sym_lookup_dmap(struct sym_hcb *np, u32 h, int s)
1352 /* Look up existing mappings */
1353 for (i = SYM_DMAP_SIZE-1; i > 0; i--) {
1354 if (h == np->dmap_bah[i])
1357 /* If direct mapping is free, get it */
1358 if (!np->dmap_bah[s])
1360 /* Collision -> lookup free mappings */
1361 for (s = SYM_DMAP_SIZE-1; s > 0; s--) {
1362 if (!np->dmap_bah[s])
1366 panic("sym: ran out of 64 bit DMA segment registers");
1369 np->dmap_bah[s] = h;
1375 * Update IO registers scratch C..R so they will be
1376 * in sync. with queued CCB expectations.
1378 static void sym_update_dmap_regs(struct sym_hcb *np)
1382 if (!np->dmap_dirty)
1384 o = offsetof(struct sym_reg, nc_scrx[0]);
1385 for (i = 0; i < SYM_DMAP_SIZE; i++) {
1386 OUTL_OFF(np, o, np->dmap_bah[i]);
1393 /* Enforce all the fiddly SPI rules and the chip limitations */
1394 static void sym_check_goals(struct sym_hcb *np, struct scsi_target *starget,
1395 struct sym_trans *goal)
1397 if (!spi_support_wide(starget))
1400 if (!spi_support_sync(starget)) {
1409 if (spi_support_dt(starget)) {
1410 if (spi_support_dt_only(starget))
1413 if (goal->offset == 0)
1419 /* Some targets fail to properly negotiate DT in SE mode */
1420 if ((np->scsi_mode != SMODE_LVD) || !(np->features & FE_U3EN))
1424 /* all DT transfers must be wide */
1426 if (goal->offset > np->maxoffs_dt)
1427 goal->offset = np->maxoffs_dt;
1428 if (goal->period < np->minsync_dt)
1429 goal->period = np->minsync_dt;
1430 if (goal->period > np->maxsync_dt)
1431 goal->period = np->maxsync_dt;
1433 goal->iu = goal->qas = 0;
1434 if (goal->offset > np->maxoffs)
1435 goal->offset = np->maxoffs;
1436 if (goal->period < np->minsync)
1437 goal->period = np->minsync;
1438 if (goal->period > np->maxsync)
1439 goal->period = np->maxsync;
1444 * Prepare the next negotiation message if needed.
1446 * Fill in the part of message buffer that contains the
1447 * negotiation and the nego_status field of the CCB.
1448 * Returns the size of the message in bytes.
1450 static int sym_prepare_nego(struct sym_hcb *np, struct sym_ccb *cp, u_char *msgptr)
1452 struct sym_tcb *tp = &np->target[cp->target];
1453 struct scsi_target *starget = tp->starget;
1454 struct sym_trans *goal = &tp->tgoal;
1458 sym_check_goals(np, starget, goal);
1461 * Many devices implement PPR in a buggy way, so only use it if we
1464 if (goal->iu || goal->dt || goal->qas || (goal->period < 0xa)) {
1466 } else if (spi_width(starget) != goal->width) {
1468 } else if (spi_period(starget) != goal->period ||
1469 spi_offset(starget) != goal->offset) {
1472 goal->check_nego = 0;
1478 msgptr[msglen++] = M_EXTENDED;
1479 msgptr[msglen++] = 3;
1480 msgptr[msglen++] = M_X_SYNC_REQ;
1481 msgptr[msglen++] = goal->period;
1482 msgptr[msglen++] = goal->offset;
1485 msgptr[msglen++] = M_EXTENDED;
1486 msgptr[msglen++] = 2;
1487 msgptr[msglen++] = M_X_WIDE_REQ;
1488 msgptr[msglen++] = goal->width;
1491 msgptr[msglen++] = M_EXTENDED;
1492 msgptr[msglen++] = 6;
1493 msgptr[msglen++] = M_X_PPR_REQ;
1494 msgptr[msglen++] = goal->period;
1495 msgptr[msglen++] = 0;
1496 msgptr[msglen++] = goal->offset;
1497 msgptr[msglen++] = goal->width;
1498 msgptr[msglen++] = (goal->iu ? PPR_OPT_IU : 0) |
1499 (goal->dt ? PPR_OPT_DT : 0) |
1500 (goal->qas ? PPR_OPT_QAS : 0);
1504 cp->nego_status = nego;
1507 tp->nego_cp = cp; /* Keep track a nego will be performed */
1508 if (DEBUG_FLAGS & DEBUG_NEGO) {
1509 sym_print_nego_msg(np, cp->target,
1510 nego == NS_SYNC ? "sync msgout" :
1511 nego == NS_WIDE ? "wide msgout" :
1512 "ppr msgout", msgptr);
1520 * Insert a job into the start queue.
1522 void sym_put_start_queue(struct sym_hcb *np, struct sym_ccb *cp)
1526 #ifdef SYM_CONF_IARB_SUPPORT
1528 * If the previously queued CCB is not yet done,
1529 * set the IARB hint. The SCRIPTS will go with IARB
1530 * for this job when starting the previous one.
1531 * We leave devices a chance to win arbitration by
1532 * not using more than 'iarb_max' consecutive
1533 * immediate arbitrations.
1535 if (np->last_cp && np->iarb_count < np->iarb_max) {
1536 np->last_cp->host_flags |= HF_HINT_IARB;
1544 #if SYM_CONF_DMA_ADDRESSING_MODE == 2
1546 * Make SCRIPTS aware of the 64 bit DMA
1547 * segment registers not being up-to-date.
1550 cp->host_xflags |= HX_DMAP_DIRTY;
1554 * Insert first the idle task and then our job.
1555 * The MBs should ensure proper ordering.
1557 qidx = np->squeueput + 2;
1558 if (qidx >= MAX_QUEUE*2) qidx = 0;
1560 np->squeue [qidx] = cpu_to_scr(np->idletask_ba);
1561 MEMORY_WRITE_BARRIER();
1562 np->squeue [np->squeueput] = cpu_to_scr(cp->ccb_ba);
1564 np->squeueput = qidx;
1566 if (DEBUG_FLAGS & DEBUG_QUEUE)
1567 printf ("%s: queuepos=%d.\n", sym_name (np), np->squeueput);
1570 * Script processor may be waiting for reselect.
1573 MEMORY_WRITE_BARRIER();
1574 OUTB(np, nc_istat, SIGP|np->istat_sem);
1577 #ifdef SYM_OPT_HANDLE_DEVICE_QUEUEING
1579 * Start next ready-to-start CCBs.
1581 void sym_start_next_ccbs(struct sym_hcb *np, struct sym_lcb *lp, int maxn)
1587 * Paranoia, as usual. :-)
1589 assert(!lp->started_tags || !lp->started_no_tag);
1592 * Try to start as many commands as asked by caller.
1593 * Prevent from having both tagged and untagged
1594 * commands queued to the device at the same time.
1597 qp = sym_remque_head(&lp->waiting_ccbq);
1600 cp = sym_que_entry(qp, struct sym_ccb, link2_ccbq);
1601 if (cp->tag != NO_TAG) {
1602 if (lp->started_no_tag ||
1603 lp->started_tags >= lp->started_max) {
1604 sym_insque_head(qp, &lp->waiting_ccbq);
1607 lp->itlq_tbl[cp->tag] = cpu_to_scr(cp->ccb_ba);
1609 cpu_to_scr(SCRIPTA_BA(np, resel_tag));
1612 if (lp->started_no_tag || lp->started_tags) {
1613 sym_insque_head(qp, &lp->waiting_ccbq);
1616 lp->head.itl_task_sa = cpu_to_scr(cp->ccb_ba);
1618 cpu_to_scr(SCRIPTA_BA(np, resel_no_tag));
1619 ++lp->started_no_tag;
1622 sym_insque_tail(qp, &lp->started_ccbq);
1623 sym_put_start_queue(np, cp);
1626 #endif /* SYM_OPT_HANDLE_DEVICE_QUEUEING */
1629 * The chip may have completed jobs. Look at the DONE QUEUE.
1631 * On paper, memory read barriers may be needed here to
1632 * prevent out of order LOADs by the CPU from having
1633 * prefetched stale data prior to DMA having occurred.
1635 static int sym_wakeup_done (struct sym_hcb *np)
1644 /* MEMORY_READ_BARRIER(); */
1646 dsa = scr_to_cpu(np->dqueue[i]);
1650 if ((i = i+2) >= MAX_QUEUE*2)
1653 cp = sym_ccb_from_dsa(np, dsa);
1655 MEMORY_READ_BARRIER();
1656 sym_complete_ok (np, cp);
1660 printf ("%s: bad DSA (%x) in done queue.\n",
1661 sym_name(np), (u_int) dsa);
1669 * Complete all CCBs queued to the COMP queue.
1671 * These CCBs are assumed:
1672 * - Not to be referenced either by devices or
1673 * SCRIPTS-related queues and datas.
1674 * - To have to be completed with an error condition
1677 * The device queue freeze count is incremented
1678 * for each CCB that does not prevent this.
1679 * This function is called when all CCBs involved
1680 * in error handling/recovery have been reaped.
1682 static void sym_flush_comp_queue(struct sym_hcb *np, int cam_status)
1687 while ((qp = sym_remque_head(&np->comp_ccbq)) != 0) {
1688 struct scsi_cmnd *cmd;
1689 cp = sym_que_entry(qp, struct sym_ccb, link_ccbq);
1690 sym_insque_tail(&cp->link_ccbq, &np->busy_ccbq);
1691 /* Leave quiet CCBs waiting for resources */
1692 if (cp->host_status == HS_WAIT)
1696 sym_set_cam_status(cmd, cam_status);
1697 #ifdef SYM_OPT_HANDLE_DEVICE_QUEUEING
1698 if (sym_get_cam_status(cmd) == DID_SOFT_ERROR) {
1699 struct sym_tcb *tp = &np->target[cp->target];
1700 struct sym_lcb *lp = sym_lp(tp, cp->lun);
1702 sym_remque(&cp->link2_ccbq);
1703 sym_insque_tail(&cp->link2_ccbq,
1706 if (cp->tag != NO_TAG)
1709 --lp->started_no_tag;
1716 sym_free_ccb(np, cp);
1717 sym_xpt_done(np, cmd);
1722 * Complete all active CCBs with error.
1723 * Used on CHIP/SCSI RESET.
1725 static void sym_flush_busy_queue (struct sym_hcb *np, int cam_status)
1728 * Move all active CCBs to the COMP queue
1729 * and flush this queue.
1731 sym_que_splice(&np->busy_ccbq, &np->comp_ccbq);
1732 sym_que_init(&np->busy_ccbq);
1733 sym_flush_comp_queue(np, cam_status);
1740 * 0: initialisation.
1741 * 1: SCSI BUS RESET delivered or received.
1742 * 2: SCSI BUS MODE changed.
1744 void sym_start_up (struct sym_hcb *np, int reason)
1750 * Reset chip if asked, otherwise just clear fifos.
1755 OUTB(np, nc_stest3, TE|CSF);
1756 OUTONB(np, nc_ctest3, CLF);
1762 phys = np->squeue_ba;
1763 for (i = 0; i < MAX_QUEUE*2; i += 2) {
1764 np->squeue[i] = cpu_to_scr(np->idletask_ba);
1765 np->squeue[i+1] = cpu_to_scr(phys + (i+2)*4);
1767 np->squeue[MAX_QUEUE*2-1] = cpu_to_scr(phys);
1770 * Start at first entry.
1777 phys = np->dqueue_ba;
1778 for (i = 0; i < MAX_QUEUE*2; i += 2) {
1780 np->dqueue[i+1] = cpu_to_scr(phys + (i+2)*4);
1782 np->dqueue[MAX_QUEUE*2-1] = cpu_to_scr(phys);
1785 * Start at first entry.
1790 * Install patches in scripts.
1791 * This also let point to first position the start
1792 * and done queue pointers used from SCRIPTS.
1797 * Wakeup all pending jobs.
1799 sym_flush_busy_queue(np, DID_RESET);
1804 OUTB(np, nc_istat, 0x00); /* Remove Reset, abort */
1806 udelay(2000); /* The 895 needs time for the bus mode to settle */
1808 OUTB(np, nc_scntl0, np->rv_scntl0 | 0xc0);
1809 /* full arb., ena parity, par->ATN */
1810 OUTB(np, nc_scntl1, 0x00); /* odd parity, and remove CRST!! */
1812 sym_selectclock(np, np->rv_scntl3); /* Select SCSI clock */
1814 OUTB(np, nc_scid , RRE|np->myaddr); /* Adapter SCSI address */
1815 OUTW(np, nc_respid, 1ul<<np->myaddr); /* Id to respond to */
1816 OUTB(np, nc_istat , SIGP ); /* Signal Process */
1817 OUTB(np, nc_dmode , np->rv_dmode); /* Burst length, dma mode */
1818 OUTB(np, nc_ctest5, np->rv_ctest5); /* Large fifo + large burst */
1820 OUTB(np, nc_dcntl , NOCOM|np->rv_dcntl); /* Protect SFBR */
1821 OUTB(np, nc_ctest3, np->rv_ctest3); /* Write and invalidate */
1822 OUTB(np, nc_ctest4, np->rv_ctest4); /* Master parity checking */
1824 /* Extended Sreq/Sack filtering not supported on the C10 */
1825 if (np->features & FE_C10)
1826 OUTB(np, nc_stest2, np->rv_stest2);
1828 OUTB(np, nc_stest2, EXT|np->rv_stest2);
1830 OUTB(np, nc_stest3, TE); /* TolerANT enable */
1831 OUTB(np, nc_stime0, 0x0c); /* HTH disabled STO 0.25 sec */
1834 * For now, disable AIP generation on C1010-66.
1836 if (np->device_id == PCI_DEVICE_ID_LSI_53C1010_66)
1837 OUTB(np, nc_aipcntl1, DISAIP);
1840 * C10101 rev. 0 errata.
1841 * Errant SGE's when in narrow. Write bits 4 & 5 of
1842 * STEST1 register to disable SGE. We probably should do
1843 * that from SCRIPTS for each selection/reselection, but
1844 * I just don't want. :)
1846 if (np->device_id == PCI_DEVICE_ID_LSI_53C1010_33 &&
1847 np->revision_id < 1)
1848 OUTB(np, nc_stest1, INB(np, nc_stest1) | 0x30);
1851 * DEL 441 - 53C876 Rev 5 - Part Number 609-0392787/2788 - ITEM 2.
1852 * Disable overlapped arbitration for some dual function devices,
1853 * regardless revision id (kind of post-chip-design feature. ;-))
1855 if (np->device_id == PCI_DEVICE_ID_NCR_53C875)
1856 OUTB(np, nc_ctest0, (1<<5));
1857 else if (np->device_id == PCI_DEVICE_ID_NCR_53C896)
1858 np->rv_ccntl0 |= DPR;
1861 * Write CCNTL0/CCNTL1 for chips capable of 64 bit addressing
1862 * and/or hardware phase mismatch, since only such chips
1863 * seem to support those IO registers.
1865 if (np->features & (FE_DAC|FE_NOPM)) {
1866 OUTB(np, nc_ccntl0, np->rv_ccntl0);
1867 OUTB(np, nc_ccntl1, np->rv_ccntl1);
1870 #if SYM_CONF_DMA_ADDRESSING_MODE == 2
1872 * Set up scratch C and DRS IO registers to map the 32 bit
1873 * DMA address range our data structures are located in.
1876 np->dmap_bah[0] = 0; /* ??? */
1877 OUTL(np, nc_scrx[0], np->dmap_bah[0]);
1878 OUTL(np, nc_drs, np->dmap_bah[0]);
1883 * If phase mismatch handled by scripts (895A/896/1010),
1884 * set PM jump addresses.
1886 if (np->features & FE_NOPM) {
1887 OUTL(np, nc_pmjad1, SCRIPTB_BA(np, pm_handle));
1888 OUTL(np, nc_pmjad2, SCRIPTB_BA(np, pm_handle));
1892 * Enable GPIO0 pin for writing if LED support from SCRIPTS.
1893 * Also set GPIO5 and clear GPIO6 if hardware LED control.
1895 if (np->features & FE_LED0)
1896 OUTB(np, nc_gpcntl, INB(np, nc_gpcntl) & ~0x01);
1897 else if (np->features & FE_LEDC)
1898 OUTB(np, nc_gpcntl, (INB(np, nc_gpcntl) & ~0x41) | 0x20);
1903 OUTW(np, nc_sien , STO|HTH|MA|SGE|UDC|RST|PAR);
1904 OUTB(np, nc_dien , MDPE|BF|SSI|SIR|IID);
1907 * For 895/6 enable SBMC interrupt and save current SCSI bus mode.
1908 * Try to eat the spurious SBMC interrupt that may occur when
1909 * we reset the chip but not the SCSI BUS (at initialization).
1911 if (np->features & (FE_ULTRA2|FE_ULTRA3)) {
1912 OUTONW(np, nc_sien, SBMC);
1918 np->scsi_mode = INB(np, nc_stest4) & SMODE;
1922 * Fill in target structure.
1923 * Reinitialize usrsync.
1924 * Reinitialize usrwide.
1925 * Prepare sync negotiation according to actual SCSI bus mode.
1927 for (i=0;i<SYM_CONF_MAX_TARGET;i++) {
1928 struct sym_tcb *tp = &np->target[i];
1932 tp->head.wval = np->rv_scntl3;
1937 * Download SCSI SCRIPTS to on-chip RAM if present,
1938 * and start script processor.
1939 * We do the download preferently from the CPU.
1940 * For platforms that may not support PCI memory mapping,
1941 * we use simple SCRIPTS that performs MEMORY MOVEs.
1943 phys = SCRIPTA_BA(np, init);
1945 if (sym_verbose >= 2)
1946 printf("%s: Downloading SCSI SCRIPTS.\n", sym_name(np));
1947 memcpy_toio(np->s.ramaddr, np->scripta0, np->scripta_sz);
1948 if (np->ram_ws == 8192) {
1949 memcpy_toio(np->s.ramaddr + 4096, np->scriptb0, np->scriptb_sz);
1950 phys = scr_to_cpu(np->scr_ram_seg);
1951 OUTL(np, nc_mmws, phys);
1952 OUTL(np, nc_mmrs, phys);
1953 OUTL(np, nc_sfs, phys);
1954 phys = SCRIPTB_BA(np, start64);
1960 OUTL(np, nc_dsa, np->hcb_ba);
1964 * Notify the XPT about the RESET condition.
1967 sym_xpt_async_bus_reset(np);
1971 * Switch trans mode for current job and its target.
1973 static void sym_settrans(struct sym_hcb *np, int target, u_char opts, u_char ofs,
1974 u_char per, u_char wide, u_char div, u_char fak)
1977 u_char sval, wval, uval;
1978 struct sym_tcb *tp = &np->target[target];
1980 assert(target == (INB(np, nc_sdid) & 0x0f));
1982 sval = tp->head.sval;
1983 wval = tp->head.wval;
1984 uval = tp->head.uval;
1987 printf("XXXX sval=%x wval=%x uval=%x (%x)\n",
1988 sval, wval, uval, np->rv_scntl3);
1993 if (!(np->features & FE_C10))
1994 sval = (sval & ~0x1f) | ofs;
1996 sval = (sval & ~0x3f) | ofs;
1999 * Set the sync divisor and extra clock factor.
2002 wval = (wval & ~0x70) | ((div+1) << 4);
2003 if (!(np->features & FE_C10))
2004 sval = (sval & ~0xe0) | (fak << 5);
2006 uval = uval & ~(XCLKH_ST|XCLKH_DT|XCLKS_ST|XCLKS_DT);
2007 if (fak >= 1) uval |= (XCLKH_ST|XCLKH_DT);
2008 if (fak >= 2) uval |= (XCLKS_ST|XCLKS_DT);
2013 * Set the bus width.
2020 * Set misc. ultra enable bits.
2022 if (np->features & FE_C10) {
2023 uval = uval & ~(U3EN|AIPCKEN);
2025 assert(np->features & FE_U3EN);
2029 wval = wval & ~ULTRA;
2030 if (per <= 12) wval |= ULTRA;
2034 * Stop there if sync parameters are unchanged.
2036 if (tp->head.sval == sval &&
2037 tp->head.wval == wval &&
2038 tp->head.uval == uval)
2040 tp->head.sval = sval;
2041 tp->head.wval = wval;
2042 tp->head.uval = uval;
2045 * Disable extended Sreq/Sack filtering if per < 50.
2046 * Not supported on the C1010.
2048 if (per < 50 && !(np->features & FE_C10))
2049 OUTOFFB(np, nc_stest2, EXT);
2052 * set actual value and sync_status
2054 OUTB(np, nc_sxfer, tp->head.sval);
2055 OUTB(np, nc_scntl3, tp->head.wval);
2057 if (np->features & FE_C10) {
2058 OUTB(np, nc_scntl4, tp->head.uval);
2062 * patch ALL busy ccbs of this target.
2064 FOR_EACH_QUEUED_ELEMENT(&np->busy_ccbq, qp) {
2066 cp = sym_que_entry(qp, struct sym_ccb, link_ccbq);
2067 if (cp->target != target)
2069 cp->phys.select.sel_scntl3 = tp->head.wval;
2070 cp->phys.select.sel_sxfer = tp->head.sval;
2071 if (np->features & FE_C10) {
2072 cp->phys.select.sel_scntl4 = tp->head.uval;
2078 * We received a WDTR.
2079 * Let everything be aware of the changes.
2081 static void sym_setwide(struct sym_hcb *np, int target, u_char wide)
2083 struct sym_tcb *tp = &np->target[target];
2084 struct scsi_target *starget = tp->starget;
2086 if (spi_width(starget) == wide)
2089 sym_settrans(np, target, 0, 0, 0, wide, 0, 0);
2091 tp->tgoal.width = wide;
2092 spi_offset(starget) = 0;
2093 spi_period(starget) = 0;
2094 spi_width(starget) = wide;
2095 spi_iu(starget) = 0;
2096 spi_dt(starget) = 0;
2097 spi_qas(starget) = 0;
2099 if (sym_verbose >= 3)
2100 spi_display_xfer_agreement(starget);
2104 * We received a SDTR.
2105 * Let everything be aware of the changes.
2108 sym_setsync(struct sym_hcb *np, int target,
2109 u_char ofs, u_char per, u_char div, u_char fak)
2111 struct sym_tcb *tp = &np->target[target];
2112 struct scsi_target *starget = tp->starget;
2113 u_char wide = (tp->head.wval & EWS) ? BUS_16_BIT : BUS_8_BIT;
2115 sym_settrans(np, target, 0, ofs, per, wide, div, fak);
2117 spi_period(starget) = per;
2118 spi_offset(starget) = ofs;
2119 spi_iu(starget) = spi_dt(starget) = spi_qas(starget) = 0;
2121 if (!tp->tgoal.dt && !tp->tgoal.iu && !tp->tgoal.qas) {
2122 tp->tgoal.period = per;
2123 tp->tgoal.offset = ofs;
2124 tp->tgoal.check_nego = 0;
2127 spi_display_xfer_agreement(starget);
2131 * We received a PPR.
2132 * Let everything be aware of the changes.
2135 sym_setpprot(struct sym_hcb *np, int target, u_char opts, u_char ofs,
2136 u_char per, u_char wide, u_char div, u_char fak)
2138 struct sym_tcb *tp = &np->target[target];
2139 struct scsi_target *starget = tp->starget;
2141 sym_settrans(np, target, opts, ofs, per, wide, div, fak);
2143 spi_width(starget) = tp->tgoal.width = wide;
2144 spi_period(starget) = tp->tgoal.period = per;
2145 spi_offset(starget) = tp->tgoal.offset = ofs;
2146 spi_iu(starget) = tp->tgoal.iu = !!(opts & PPR_OPT_IU);
2147 spi_dt(starget) = tp->tgoal.dt = !!(opts & PPR_OPT_DT);
2148 spi_qas(starget) = tp->tgoal.qas = !!(opts & PPR_OPT_QAS);
2149 tp->tgoal.check_nego = 0;
2151 spi_display_xfer_agreement(starget);
2155 * generic recovery from scsi interrupt
2157 * The doc says that when the chip gets an SCSI interrupt,
2158 * it tries to stop in an orderly fashion, by completing
2159 * an instruction fetch that had started or by flushing
2160 * the DMA fifo for a write to memory that was executing.
2161 * Such a fashion is not enough to know if the instruction
2162 * that was just before the current DSP value has been
2165 * There are some small SCRIPTS sections that deal with
2166 * the start queue and the done queue that may break any
2167 * assomption from the C code if we are interrupted
2168 * inside, so we reset if this happens. Btw, since these
2169 * SCRIPTS sections are executed while the SCRIPTS hasn't
2170 * started SCSI operations, it is very unlikely to happen.
2172 * All the driver data structures are supposed to be
2173 * allocated from the same 4 GB memory window, so there
2174 * is a 1 to 1 relationship between DSA and driver data
2175 * structures. Since we are careful :) to invalidate the
2176 * DSA when we complete a command or when the SCRIPTS
2177 * pushes a DSA into a queue, we can trust it when it
2180 static void sym_recover_scsi_int (struct sym_hcb *np, u_char hsts)
2182 u32 dsp = INL(np, nc_dsp);
2183 u32 dsa = INL(np, nc_dsa);
2184 struct sym_ccb *cp = sym_ccb_from_dsa(np, dsa);
2187 * If we haven't been interrupted inside the SCRIPTS
2188 * critical pathes, we can safely restart the SCRIPTS
2189 * and trust the DSA value if it matches a CCB.
2191 if ((!(dsp > SCRIPTA_BA(np, getjob_begin) &&
2192 dsp < SCRIPTA_BA(np, getjob_end) + 1)) &&
2193 (!(dsp > SCRIPTA_BA(np, ungetjob) &&
2194 dsp < SCRIPTA_BA(np, reselect) + 1)) &&
2195 (!(dsp > SCRIPTB_BA(np, sel_for_abort) &&
2196 dsp < SCRIPTB_BA(np, sel_for_abort_1) + 1)) &&
2197 (!(dsp > SCRIPTA_BA(np, done) &&
2198 dsp < SCRIPTA_BA(np, done_end) + 1))) {
2199 OUTB(np, nc_ctest3, np->rv_ctest3 | CLF); /* clear dma fifo */
2200 OUTB(np, nc_stest3, TE|CSF); /* clear scsi fifo */
2202 * If we have a CCB, let the SCRIPTS call us back for
2203 * the handling of the error with SCRATCHA filled with
2204 * STARTPOS. This way, we will be able to freeze the
2205 * device queue and requeue awaiting IOs.
2208 cp->host_status = hsts;
2209 OUTL_DSP(np, SCRIPTA_BA(np, complete_error));
2212 * Otherwise just restart the SCRIPTS.
2215 OUTL(np, nc_dsa, 0xffffff);
2216 OUTL_DSP(np, SCRIPTA_BA(np, start));
2225 sym_start_reset(np);
2229 * chip exception handler for selection timeout
2231 static void sym_int_sto (struct sym_hcb *np)
2233 u32 dsp = INL(np, nc_dsp);
2235 if (DEBUG_FLAGS & DEBUG_TINY) printf ("T");
2237 if (dsp == SCRIPTA_BA(np, wf_sel_done) + 8)
2238 sym_recover_scsi_int(np, HS_SEL_TIMEOUT);
2240 sym_start_reset(np);
2244 * chip exception handler for unexpected disconnect
2246 static void sym_int_udc (struct sym_hcb *np)
2248 printf ("%s: unexpected disconnect\n", sym_name(np));
2249 sym_recover_scsi_int(np, HS_UNEXPECTED);
2253 * chip exception handler for SCSI bus mode change
2255 * spi2-r12 11.2.3 says a transceiver mode change must
2256 * generate a reset event and a device that detects a reset
2257 * event shall initiate a hard reset. It says also that a
2258 * device that detects a mode change shall set data transfer
2259 * mode to eight bit asynchronous, etc...
2260 * So, just reinitializing all except chip should be enough.
2262 static void sym_int_sbmc (struct sym_hcb *np)
2264 u_char scsi_mode = INB(np, nc_stest4) & SMODE;
2269 printf("%s: SCSI BUS mode change from %s to %s.\n", sym_name(np),
2270 sym_scsi_bus_mode(np->scsi_mode), sym_scsi_bus_mode(scsi_mode));
2273 * Should suspend command processing for a few seconds and
2274 * reinitialize all except the chip.
2276 sym_start_up (np, 2);
2280 * chip exception handler for SCSI parity error.
2282 * When the chip detects a SCSI parity error and is
2283 * currently executing a (CH)MOV instruction, it does
2284 * not interrupt immediately, but tries to finish the
2285 * transfer of the current scatter entry before
2286 * interrupting. The following situations may occur:
2288 * - The complete scatter entry has been transferred
2289 * without the device having changed phase.
2290 * The chip will then interrupt with the DSP pointing
2291 * to the instruction that follows the MOV.
2293 * - A phase mismatch occurs before the MOV finished
2294 * and phase errors are to be handled by the C code.
2295 * The chip will then interrupt with both PAR and MA
2298 * - A phase mismatch occurs before the MOV finished and
2299 * phase errors are to be handled by SCRIPTS.
2300 * The chip will load the DSP with the phase mismatch
2301 * JUMP address and interrupt the host processor.
2303 static void sym_int_par (struct sym_hcb *np, u_short sist)
2305 u_char hsts = INB(np, HS_PRT);
2306 u32 dsp = INL(np, nc_dsp);
2307 u32 dbc = INL(np, nc_dbc);
2308 u32 dsa = INL(np, nc_dsa);
2309 u_char sbcl = INB(np, nc_sbcl);
2310 u_char cmd = dbc >> 24;
2311 int phase = cmd & 7;
2312 struct sym_ccb *cp = sym_ccb_from_dsa(np, dsa);
2314 printf("%s: SCSI parity error detected: SCR1=%d DBC=%x SBCL=%x\n",
2315 sym_name(np), hsts, dbc, sbcl);
2318 * Check that the chip is connected to the SCSI BUS.
2320 if (!(INB(np, nc_scntl1) & ISCON)) {
2321 sym_recover_scsi_int(np, HS_UNEXPECTED);
2326 * If the nexus is not clearly identified, reset the bus.
2327 * We will try to do better later.
2333 * Check instruction was a MOV, direction was INPUT and
2336 if ((cmd & 0xc0) || !(phase & 1) || !(sbcl & 0x8))
2340 * Keep track of the parity error.
2342 OUTONB(np, HF_PRT, HF_EXT_ERR);
2343 cp->xerr_status |= XE_PARITY_ERR;
2346 * Prepare the message to send to the device.
2348 np->msgout[0] = (phase == 7) ? M_PARITY : M_ID_ERROR;
2351 * If the old phase was DATA IN phase, we have to deal with
2352 * the 3 situations described above.
2353 * For other input phases (MSG IN and STATUS), the device
2354 * must resend the whole thing that failed parity checking
2355 * or signal error. So, jumping to dispatcher should be OK.
2357 if (phase == 1 || phase == 5) {
2358 /* Phase mismatch handled by SCRIPTS */
2359 if (dsp == SCRIPTB_BA(np, pm_handle))
2361 /* Phase mismatch handled by the C code */
2364 /* No phase mismatch occurred */
2366 sym_set_script_dp (np, cp, dsp);
2367 OUTL_DSP(np, SCRIPTA_BA(np, dispatch));
2370 else if (phase == 7) /* We definitely cannot handle parity errors */
2371 #if 1 /* in message-in phase due to the relection */
2372 goto reset_all; /* path and various message anticipations. */
2374 OUTL_DSP(np, SCRIPTA_BA(np, clrack));
2377 OUTL_DSP(np, SCRIPTA_BA(np, dispatch));
2381 sym_start_reset(np);
2386 * chip exception handler for phase errors.
2388 * We have to construct a new transfer descriptor,
2389 * to transfer the rest of the current block.
2391 static void sym_int_ma (struct sym_hcb *np)
2404 u_char hflags, hflags0;
2408 dsp = INL(np, nc_dsp);
2409 dbc = INL(np, nc_dbc);
2410 dsa = INL(np, nc_dsa);
2413 rest = dbc & 0xffffff;
2417 * locate matching cp if any.
2419 cp = sym_ccb_from_dsa(np, dsa);
2422 * Donnot take into account dma fifo and various buffers in
2423 * INPUT phase since the chip flushes everything before
2424 * raising the MA interrupt for interrupted INPUT phases.
2425 * For DATA IN phase, we will check for the SWIDE later.
2427 if ((cmd & 7) != 1 && (cmd & 7) != 5) {
2430 if (np->features & FE_DFBC)
2431 delta = INW(np, nc_dfbc);
2436 * Read DFIFO, CTEST[4-6] using 1 PCI bus ownership.
2438 dfifo = INL(np, nc_dfifo);
2441 * Calculate remaining bytes in DMA fifo.
2442 * (CTEST5 = dfifo >> 16)
2444 if (dfifo & (DFS << 16))
2445 delta = ((((dfifo >> 8) & 0x300) |
2446 (dfifo & 0xff)) - rest) & 0x3ff;
2448 delta = ((dfifo & 0xff) - rest) & 0x7f;
2452 * The data in the dma fifo has not been transfered to
2453 * the target -> add the amount to the rest
2454 * and clear the data.
2455 * Check the sstat2 register in case of wide transfer.
2458 ss0 = INB(np, nc_sstat0);
2459 if (ss0 & OLF) rest++;
2460 if (!(np->features & FE_C10))
2461 if (ss0 & ORF) rest++;
2462 if (cp && (cp->phys.select.sel_scntl3 & EWS)) {
2463 ss2 = INB(np, nc_sstat2);
2464 if (ss2 & OLF1) rest++;
2465 if (!(np->features & FE_C10))
2466 if (ss2 & ORF1) rest++;
2472 OUTB(np, nc_ctest3, np->rv_ctest3 | CLF); /* dma fifo */
2473 OUTB(np, nc_stest3, TE|CSF); /* scsi fifo */
2477 * log the information
2479 if (DEBUG_FLAGS & (DEBUG_TINY|DEBUG_PHASE))
2480 printf ("P%x%x RL=%d D=%d ", cmd&7, INB(np, nc_sbcl)&7,
2481 (unsigned) rest, (unsigned) delta);
2484 * try to find the interrupted script command,
2485 * and the address at which to continue.
2489 if (dsp > np->scripta_ba &&
2490 dsp <= np->scripta_ba + np->scripta_sz) {
2491 vdsp = (u32 *)((char*)np->scripta0 + (dsp-np->scripta_ba-8));
2494 else if (dsp > np->scriptb_ba &&
2495 dsp <= np->scriptb_ba + np->scriptb_sz) {
2496 vdsp = (u32 *)((char*)np->scriptb0 + (dsp-np->scriptb_ba-8));
2501 * log the information
2503 if (DEBUG_FLAGS & DEBUG_PHASE) {
2504 printf ("\nCP=%p DSP=%x NXT=%x VDSP=%p CMD=%x ",
2505 cp, (unsigned)dsp, (unsigned)nxtdsp, vdsp, cmd);
2509 printf ("%s: interrupted SCRIPT address not found.\n",
2515 printf ("%s: SCSI phase error fixup: CCB already dequeued.\n",
2521 * get old startaddress and old length.
2523 oadr = scr_to_cpu(vdsp[1]);
2525 if (cmd & 0x10) { /* Table indirect */
2526 tblp = (u32 *) ((char*) &cp->phys + oadr);
2527 olen = scr_to_cpu(tblp[0]);
2528 oadr = scr_to_cpu(tblp[1]);
2531 olen = scr_to_cpu(vdsp[0]) & 0xffffff;
2534 if (DEBUG_FLAGS & DEBUG_PHASE) {
2535 printf ("OCMD=%x\nTBLP=%p OLEN=%x OADR=%x\n",
2536 (unsigned) (scr_to_cpu(vdsp[0]) >> 24),
2543 * check cmd against assumed interrupted script command.
2544 * If dt data phase, the MOVE instruction hasn't bit 4 of
2547 if (((cmd & 2) ? cmd : (cmd & ~4)) != (scr_to_cpu(vdsp[0]) >> 24)) {
2548 sym_print_addr(cp->cmd,
2549 "internal error: cmd=%02x != %02x=(vdsp[0] >> 24)\n",
2550 cmd, scr_to_cpu(vdsp[0]) >> 24);
2556 * if old phase not dataphase, leave here.
2559 sym_print_addr(cp->cmd,
2560 "phase change %x-%x %d@%08x resid=%d.\n",
2561 cmd&7, INB(np, nc_sbcl)&7, (unsigned)olen,
2562 (unsigned)oadr, (unsigned)rest);
2563 goto unexpected_phase;
2567 * Choose the correct PM save area.
2569 * Look at the PM_SAVE SCRIPT if you want to understand
2570 * this stuff. The equivalent code is implemented in
2571 * SCRIPTS for the 895A, 896 and 1010 that are able to
2572 * handle PM from the SCRIPTS processor.
2574 hflags0 = INB(np, HF_PRT);
2577 if (hflags & (HF_IN_PM0 | HF_IN_PM1 | HF_DP_SAVED)) {
2578 if (hflags & HF_IN_PM0)
2579 nxtdsp = scr_to_cpu(cp->phys.pm0.ret);
2580 else if (hflags & HF_IN_PM1)
2581 nxtdsp = scr_to_cpu(cp->phys.pm1.ret);
2583 if (hflags & HF_DP_SAVED)
2584 hflags ^= HF_ACT_PM;
2587 if (!(hflags & HF_ACT_PM)) {
2589 newcmd = SCRIPTA_BA(np, pm0_data);
2593 newcmd = SCRIPTA_BA(np, pm1_data);
2596 hflags &= ~(HF_IN_PM0 | HF_IN_PM1 | HF_DP_SAVED);
2597 if (hflags != hflags0)
2598 OUTB(np, HF_PRT, hflags);
2601 * fillin the phase mismatch context
2603 pm->sg.addr = cpu_to_scr(oadr + olen - rest);
2604 pm->sg.size = cpu_to_scr(rest);
2605 pm->ret = cpu_to_scr(nxtdsp);
2608 * If we have a SWIDE,
2609 * - prepare the address to write the SWIDE from SCRIPTS,
2610 * - compute the SCRIPTS address to restart from,
2611 * - move current data pointer context by one byte.
2613 nxtdsp = SCRIPTA_BA(np, dispatch);
2614 if ((cmd & 7) == 1 && cp && (cp->phys.select.sel_scntl3 & EWS) &&
2615 (INB(np, nc_scntl2) & WSR)) {
2619 * Set up the table indirect for the MOVE
2620 * of the residual byte and adjust the data
2623 tmp = scr_to_cpu(pm->sg.addr);
2624 cp->phys.wresid.addr = cpu_to_scr(tmp);
2625 pm->sg.addr = cpu_to_scr(tmp + 1);
2626 tmp = scr_to_cpu(pm->sg.size);
2627 cp->phys.wresid.size = cpu_to_scr((tmp&0xff000000) | 1);
2628 pm->sg.size = cpu_to_scr(tmp - 1);
2631 * If only the residual byte is to be moved,
2632 * no PM context is needed.
2634 if ((tmp&0xffffff) == 1)
2638 * Prepare the address of SCRIPTS that will
2639 * move the residual byte to memory.
2641 nxtdsp = SCRIPTB_BA(np, wsr_ma_helper);
2644 if (DEBUG_FLAGS & DEBUG_PHASE) {
2645 sym_print_addr(cp->cmd, "PM %x %x %x / %x %x %x.\n",
2646 hflags0, hflags, newcmd,
2647 (unsigned)scr_to_cpu(pm->sg.addr),
2648 (unsigned)scr_to_cpu(pm->sg.size),
2649 (unsigned)scr_to_cpu(pm->ret));
2653 * Restart the SCRIPTS processor.
2655 sym_set_script_dp (np, cp, newcmd);
2656 OUTL_DSP(np, nxtdsp);
2660 * Unexpected phase changes that occurs when the current phase
2661 * is not a DATA IN or DATA OUT phase are due to error conditions.
2662 * Such event may only happen when the SCRIPTS is using a
2663 * multibyte SCSI MOVE.
2665 * Phase change Some possible cause
2667 * COMMAND --> MSG IN SCSI parity error detected by target.
2668 * COMMAND --> STATUS Bad command or refused by target.
2669 * MSG OUT --> MSG IN Message rejected by target.
2670 * MSG OUT --> COMMAND Bogus target that discards extended
2671 * negotiation messages.
2673 * The code below does not care of the new phase and so
2674 * trusts the target. Why to annoy it ?
2675 * If the interrupted phase is COMMAND phase, we restart at
2677 * If a target does not get all the messages after selection,
2678 * the code assumes blindly that the target discards extended
2679 * messages and clears the negotiation status.
2680 * If the target does not want all our response to negotiation,
2681 * we force a SIR_NEGO_PROTO interrupt (it is a hack that avoids
2682 * bloat for such a should_not_happen situation).
2683 * In all other situation, we reset the BUS.
2684 * Are these assumptions reasonnable ? (Wait and see ...)
2691 case 2: /* COMMAND phase */
2692 nxtdsp = SCRIPTA_BA(np, dispatch);
2695 case 3: /* STATUS phase */
2696 nxtdsp = SCRIPTA_BA(np, dispatch);
2699 case 6: /* MSG OUT phase */
2701 * If the device may want to use untagged when we want
2702 * tagged, we prepare an IDENTIFY without disc. granted,
2703 * since we will not be able to handle reselect.
2704 * Otherwise, we just don't care.
2706 if (dsp == SCRIPTA_BA(np, send_ident)) {
2707 if (cp->tag != NO_TAG && olen - rest <= 3) {
2708 cp->host_status = HS_BUSY;
2709 np->msgout[0] = IDENTIFY(0, cp->lun);
2710 nxtdsp = SCRIPTB_BA(np, ident_break_atn);
2713 nxtdsp = SCRIPTB_BA(np, ident_break);
2715 else if (dsp == SCRIPTB_BA(np, send_wdtr) ||
2716 dsp == SCRIPTB_BA(np, send_sdtr) ||
2717 dsp == SCRIPTB_BA(np, send_ppr)) {
2718 nxtdsp = SCRIPTB_BA(np, nego_bad_phase);
2719 if (dsp == SCRIPTB_BA(np, send_ppr)) {
2720 struct scsi_device *dev = cp->cmd->device;
2726 case 7: /* MSG IN phase */
2727 nxtdsp = SCRIPTA_BA(np, clrack);
2733 OUTL_DSP(np, nxtdsp);
2738 sym_start_reset(np);
2742 * chip interrupt handler
2744 * In normal situations, interrupt conditions occur one at
2745 * a time. But when something bad happens on the SCSI BUS,
2746 * the chip may raise several interrupt flags before
2747 * stopping and interrupting the CPU. The additionnal
2748 * interrupt flags are stacked in some extra registers
2749 * after the SIP and/or DIP flag has been raised in the
2750 * ISTAT. After the CPU has read the interrupt condition
2751 * flag from SIST or DSTAT, the chip unstacks the other
2752 * interrupt flags and sets the corresponding bits in
2753 * SIST or DSTAT. Since the chip starts stacking once the
2754 * SIP or DIP flag is set, there is a small window of time
2755 * where the stacking does not occur.
2757 * Typically, multiple interrupt conditions may happen in
2758 * the following situations:
2760 * - SCSI parity error + Phase mismatch (PAR|MA)
2761 * When an parity error is detected in input phase
2762 * and the device switches to msg-in phase inside a
2764 * - SCSI parity error + Unexpected disconnect (PAR|UDC)
2765 * When a stupid device does not want to handle the
2766 * recovery of an SCSI parity error.
2767 * - Some combinations of STO, PAR, UDC, ...
2768 * When using non compliant SCSI stuff, when user is
2769 * doing non compliant hot tampering on the BUS, when
2770 * something really bad happens to a device, etc ...
2772 * The heuristic suggested by SYMBIOS to handle
2773 * multiple interrupts is to try unstacking all
2774 * interrupts conditions and to handle them on some
2775 * priority based on error severity.
2776 * This will work when the unstacking has been
2777 * successful, but we cannot be 100 % sure of that,
2778 * since the CPU may have been faster to unstack than
2779 * the chip is able to stack. Hmmm ... But it seems that
2780 * such a situation is very unlikely to happen.
2782 * If this happen, for example STO caught by the CPU
2783 * then UDC happenning before the CPU have restarted
2784 * the SCRIPTS, the driver may wrongly complete the
2785 * same command on UDC, since the SCRIPTS didn't restart
2786 * and the DSA still points to the same command.
2787 * We avoid this situation by setting the DSA to an
2788 * invalid value when the CCB is completed and before
2789 * restarting the SCRIPTS.
2791 * Another issue is that we need some section of our
2792 * recovery procedures to be somehow uninterruptible but
2793 * the SCRIPTS processor does not provides such a
2794 * feature. For this reason, we handle recovery preferently
2795 * from the C code and check against some SCRIPTS critical
2796 * sections from the C code.
2798 * Hopefully, the interrupt handling of the driver is now
2799 * able to resist to weird BUS error conditions, but donnot
2800 * ask me for any guarantee that it will never fail. :-)
2801 * Use at your own decision and risk.
2804 void sym_interrupt (struct sym_hcb *np)
2806 u_char istat, istatc;
2811 * interrupt on the fly ?
2812 * (SCRIPTS may still be running)
2814 * A `dummy read' is needed to ensure that the
2815 * clear of the INTF flag reaches the device
2816 * and that posted writes are flushed to memory
2817 * before the scanning of the DONE queue.
2818 * Note that SCRIPTS also (dummy) read to memory
2819 * prior to deliver the INTF interrupt condition.
2821 istat = INB(np, nc_istat);
2823 OUTB(np, nc_istat, (istat & SIGP) | INTF | np->istat_sem);
2824 istat = INB(np, nc_istat); /* DUMMY READ */
2825 if (DEBUG_FLAGS & DEBUG_TINY) printf ("F ");
2826 sym_wakeup_done(np);
2829 if (!(istat & (SIP|DIP)))
2832 #if 0 /* We should never get this one */
2834 OUTB(np, nc_istat, CABRT);
2838 * PAR and MA interrupts may occur at the same time,
2839 * and we need to know of both in order to handle
2840 * this situation properly. We try to unstack SCSI
2841 * interrupts for that reason. BTW, I dislike a LOT
2842 * such a loop inside the interrupt routine.
2843 * Even if DMA interrupt stacking is very unlikely to
2844 * happen, we also try unstacking these ones, since
2845 * this has no performance impact.
2852 sist |= INW(np, nc_sist);
2854 dstat |= INB(np, nc_dstat);
2855 istatc = INB(np, nc_istat);
2857 } while (istatc & (SIP|DIP));
2859 if (DEBUG_FLAGS & DEBUG_TINY)
2860 printf ("<%d|%x:%x|%x:%x>",
2861 (int)INB(np, nc_scr0),
2863 (unsigned)INL(np, nc_dsp),
2864 (unsigned)INL(np, nc_dbc));
2866 * On paper, a memory read barrier may be needed here to
2867 * prevent out of order LOADs by the CPU from having
2868 * prefetched stale data prior to DMA having occurred.
2869 * And since we are paranoid ... :)
2871 MEMORY_READ_BARRIER();
2874 * First, interrupts we want to service cleanly.
2876 * Phase mismatch (MA) is the most frequent interrupt
2877 * for chip earlier than the 896 and so we have to service
2878 * it as quickly as possible.
2879 * A SCSI parity error (PAR) may be combined with a phase
2880 * mismatch condition (MA).
2881 * Programmed interrupts (SIR) are used to call the C code
2883 * The single step interrupt (SSI) is not used in this
2886 if (!(sist & (STO|GEN|HTH|SGE|UDC|SBMC|RST)) &&
2887 !(dstat & (MDPE|BF|ABRT|IID))) {
2888 if (sist & PAR) sym_int_par (np, sist);
2889 else if (sist & MA) sym_int_ma (np);
2890 else if (dstat & SIR) sym_int_sir (np);
2891 else if (dstat & SSI) OUTONB_STD();
2892 else goto unknown_int;
2897 * Now, interrupts that donnot happen in normal
2898 * situations and that we may need to recover from.
2900 * On SCSI RESET (RST), we reset everything.
2901 * On SCSI BUS MODE CHANGE (SBMC), we complete all
2902 * active CCBs with RESET status, prepare all devices
2903 * for negotiating again and restart the SCRIPTS.
2904 * On STO and UDC, we complete the CCB with the corres-
2905 * ponding status and restart the SCRIPTS.
2908 printf("%s: SCSI BUS reset detected.\n", sym_name(np));
2909 sym_start_up (np, 1);
2913 OUTB(np, nc_ctest3, np->rv_ctest3 | CLF); /* clear dma fifo */
2914 OUTB(np, nc_stest3, TE|CSF); /* clear scsi fifo */
2916 if (!(sist & (GEN|HTH|SGE)) &&
2917 !(dstat & (MDPE|BF|ABRT|IID))) {
2918 if (sist & SBMC) sym_int_sbmc (np);
2919 else if (sist & STO) sym_int_sto (np);
2920 else if (sist & UDC) sym_int_udc (np);
2921 else goto unknown_int;
2926 * Now, interrupts we are not able to recover cleanly.
2928 * Log message for hard errors.
2932 sym_log_hard_error(np, sist, dstat);
2934 if ((sist & (GEN|HTH|SGE)) ||
2935 (dstat & (MDPE|BF|ABRT|IID))) {
2936 sym_start_reset(np);
2942 * We just miss the cause of the interrupt. :(
2943 * Print a message. The timeout will do the real work.
2945 printf( "%s: unknown interrupt(s) ignored, "
2946 "ISTAT=0x%x DSTAT=0x%x SIST=0x%x\n",
2947 sym_name(np), istat, dstat, sist);
2951 * Dequeue from the START queue all CCBs that match
2952 * a given target/lun/task condition (-1 means all),
2953 * and move them from the BUSY queue to the COMP queue
2954 * with DID_SOFT_ERROR status condition.
2955 * This function is used during error handling/recovery.
2956 * It is called with SCRIPTS not running.
2959 sym_dequeue_from_squeue(struct sym_hcb *np, int i, int target, int lun, int task)
2965 * Make sure the starting index is within range.
2967 assert((i >= 0) && (i < 2*MAX_QUEUE));
2970 * Walk until end of START queue and dequeue every job
2971 * that matches the target/lun/task condition.
2974 while (i != np->squeueput) {
2975 cp = sym_ccb_from_dsa(np, scr_to_cpu(np->squeue[i]));
2977 #ifdef SYM_CONF_IARB_SUPPORT
2978 /* Forget hints for IARB, they may be no longer relevant */
2979 cp->host_flags &= ~HF_HINT_IARB;
2981 if ((target == -1 || cp->target == target) &&
2982 (lun == -1 || cp->lun == lun) &&
2983 (task == -1 || cp->tag == task)) {
2984 sym_set_cam_status(cp->cmd, DID_SOFT_ERROR);
2985 sym_remque(&cp->link_ccbq);
2986 sym_insque_tail(&cp->link_ccbq, &np->comp_ccbq);
2990 np->squeue[j] = np->squeue[i];
2991 if ((j += 2) >= MAX_QUEUE*2) j = 0;
2993 if ((i += 2) >= MAX_QUEUE*2) i = 0;
2995 if (i != j) /* Copy back the idle task if needed */
2996 np->squeue[j] = np->squeue[i];
2997 np->squeueput = j; /* Update our current start queue pointer */
3003 * chip handler for bad SCSI status condition
3005 * In case of bad SCSI status, we unqueue all the tasks
3006 * currently queued to the controller but not yet started
3007 * and then restart the SCRIPTS processor immediately.
3009 * QUEUE FULL and BUSY conditions are handled the same way.
3010 * Basically all the not yet started tasks are requeued in
3011 * device queue and the queue is frozen until a completion.
3013 * For CHECK CONDITION and COMMAND TERMINATED status, we use
3014 * the CCB of the failed command to prepare a REQUEST SENSE
3015 * SCSI command and queue it to the controller queue.
3017 * SCRATCHA is assumed to have been loaded with STARTPOS
3018 * before the SCRIPTS called the C code.
3020 static void sym_sir_bad_scsi_status(struct sym_hcb *np, int num, struct sym_ccb *cp)
3023 u_char s_status = cp->ssss_status;
3024 u_char h_flags = cp->host_flags;
3029 * Compute the index of the next job to start from SCRIPTS.
3031 i = (INL(np, nc_scratcha) - np->squeue_ba) / 4;
3034 * The last CCB queued used for IARB hint may be
3035 * no longer relevant. Forget it.
3037 #ifdef SYM_CONF_IARB_SUPPORT
3043 * Now deal with the SCSI status.
3048 if (sym_verbose >= 2) {
3049 sym_print_addr(cp->cmd, "%s\n",
3050 s_status == S_BUSY ? "BUSY" : "QUEUE FULL\n");
3052 default: /* S_INT, S_INT_COND_MET, S_CONFLICT */
3053 sym_complete_error (np, cp);
3058 * If we get an SCSI error when requesting sense, give up.
3060 if (h_flags & HF_SENSE) {
3061 sym_complete_error (np, cp);
3066 * Dequeue all queued CCBs for that device not yet started,
3067 * and restart the SCRIPTS processor immediately.
3069 sym_dequeue_from_squeue(np, i, cp->target, cp->lun, -1);
3070 OUTL_DSP(np, SCRIPTA_BA(np, start));
3073 * Save some info of the actual IO.
3074 * Compute the data residual.
3076 cp->sv_scsi_status = cp->ssss_status;
3077 cp->sv_xerr_status = cp->xerr_status;
3078 cp->sv_resid = sym_compute_residual(np, cp);
3081 * Prepare all needed data structures for
3082 * requesting sense data.
3085 cp->scsi_smsg2[0] = IDENTIFY(0, cp->lun);
3089 * If we are currently using anything different from
3090 * async. 8 bit data transfers with that target,
3091 * start a negotiation, since the device may want
3092 * to report us a UNIT ATTENTION condition due to
3093 * a cause we currently ignore, and we donnot want
3094 * to be stuck with WIDE and/or SYNC data transfer.
3096 * cp->nego_status is filled by sym_prepare_nego().
3098 cp->nego_status = 0;
3099 msglen += sym_prepare_nego(np, cp, &cp->scsi_smsg2[msglen]);
3101 * Message table indirect structure.
3103 cp->phys.smsg.addr = CCB_BA(cp, scsi_smsg2);
3104 cp->phys.smsg.size = cpu_to_scr(msglen);
3109 cp->phys.cmd.addr = CCB_BA(cp, sensecmd);
3110 cp->phys.cmd.size = cpu_to_scr(6);
3113 * patch requested size into sense command
3115 cp->sensecmd[0] = REQUEST_SENSE;
3116 cp->sensecmd[1] = 0;
3117 if (cp->cmd->device->scsi_level <= SCSI_2 && cp->lun <= 7)
3118 cp->sensecmd[1] = cp->lun << 5;
3119 cp->sensecmd[4] = SYM_SNS_BBUF_LEN;
3120 cp->data_len = SYM_SNS_BBUF_LEN;
3125 memset(cp->sns_bbuf, 0, SYM_SNS_BBUF_LEN);
3126 cp->phys.sense.addr = CCB_BA(cp, sns_bbuf);
3127 cp->phys.sense.size = cpu_to_scr(SYM_SNS_BBUF_LEN);
3130 * requeue the command.
3132 startp = SCRIPTB_BA(np, sdata_in);
3134 cp->phys.head.savep = cpu_to_scr(startp);
3135 cp->phys.head.lastp = cpu_to_scr(startp);
3136 cp->startp = cpu_to_scr(startp);
3137 cp->goalp = cpu_to_scr(startp + 16);
3139 cp->host_xflags = 0;
3140 cp->host_status = cp->nego_status ? HS_NEGOTIATE : HS_BUSY;
3141 cp->ssss_status = S_ILLEGAL;
3142 cp->host_flags = (HF_SENSE|HF_DATA_IN);
3143 cp->xerr_status = 0;
3144 cp->extra_bytes = 0;
3146 cp->phys.head.go.start = cpu_to_scr(SCRIPTA_BA(np, select));
3149 * Requeue the command.
3151 sym_put_start_queue(np, cp);
3154 * Give back to upper layer everything we have dequeued.
3156 sym_flush_comp_queue(np, 0);
3162 * After a device has accepted some management message
3163 * as BUS DEVICE RESET, ABORT TASK, etc ..., or when
3164 * a device signals a UNIT ATTENTION condition, some
3165 * tasks are thrown away by the device. We are required
3166 * to reflect that on our tasks list since the device
3167 * will never complete these tasks.
3169 * This function move from the BUSY queue to the COMP
3170 * queue all disconnected CCBs for a given target that
3171 * match the following criteria:
3172 * - lun=-1 means any logical UNIT otherwise a given one.
3173 * - task=-1 means any task, otherwise a given one.
3175 int sym_clear_tasks(struct sym_hcb *np, int cam_status, int target, int lun, int task)
3177 SYM_QUEHEAD qtmp, *qp;
3182 * Move the entire BUSY queue to our temporary queue.
3184 sym_que_init(&qtmp);
3185 sym_que_splice(&np->busy_ccbq, &qtmp);
3186 sym_que_init(&np->busy_ccbq);
3189 * Put all CCBs that matches our criteria into
3190 * the COMP queue and put back other ones into
3193 while ((qp = sym_remque_head(&qtmp)) != 0) {
3194 struct scsi_cmnd *cmd;
3195 cp = sym_que_entry(qp, struct sym_ccb, link_ccbq);
3197 if (cp->host_status != HS_DISCONNECT ||
3198 cp->target != target ||
3199 (lun != -1 && cp->lun != lun) ||
3201 (cp->tag != NO_TAG && cp->scsi_smsg[2] != task))) {
3202 sym_insque_tail(&cp->link_ccbq, &np->busy_ccbq);
3205 sym_insque_tail(&cp->link_ccbq, &np->comp_ccbq);
3207 /* Preserve the software timeout condition */
3208 if (sym_get_cam_status(cmd) != DID_TIME_OUT)
3209 sym_set_cam_status(cmd, cam_status);
3212 printf("XXXX TASK @%p CLEARED\n", cp);
3219 * chip handler for TASKS recovery
3221 * We cannot safely abort a command, while the SCRIPTS
3222 * processor is running, since we just would be in race
3225 * As long as we have tasks to abort, we keep the SEM
3226 * bit set in the ISTAT. When this bit is set, the
3227 * SCRIPTS processor interrupts (SIR_SCRIPT_STOPPED)
3228 * each time it enters the scheduler.
3230 * If we have to reset a target, clear tasks of a unit,
3231 * or to perform the abort of a disconnected job, we
3232 * restart the SCRIPTS for selecting the target. Once
3233 * selected, the SCRIPTS interrupts (SIR_TARGET_SELECTED).
3234 * If it loses arbitration, the SCRIPTS will interrupt again
3235 * the next time it will enter its scheduler, and so on ...
3237 * On SIR_TARGET_SELECTED, we scan for the more
3238 * appropriate thing to do:
3240 * - If nothing, we just sent a M_ABORT message to the
3241 * target to get rid of the useless SCSI bus ownership.
3242 * According to the specs, no tasks shall be affected.
3243 * - If the target is to be reset, we send it a M_RESET
3245 * - If a logical UNIT is to be cleared , we send the
3246 * IDENTIFY(lun) + M_ABORT.
3247 * - If an untagged task is to be aborted, we send the
3248 * IDENTIFY(lun) + M_ABORT.
3249 * - If a tagged task is to be aborted, we send the
3250 * IDENTIFY(lun) + task attributes + M_ABORT_TAG.
3252 * Once our 'kiss of death' :) message has been accepted
3253 * by the target, the SCRIPTS interrupts again
3254 * (SIR_ABORT_SENT). On this interrupt, we complete
3255 * all the CCBs that should have been aborted by the
3256 * target according to our message.
3258 static void sym_sir_task_recovery(struct sym_hcb *np, int num)
3262 struct sym_tcb *tp = NULL; /* gcc isn't quite smart enough yet */
3263 struct scsi_target *starget;
3264 int target=-1, lun=-1, task;
3269 * The SCRIPTS processor stopped before starting
3270 * the next command in order to allow us to perform
3271 * some task recovery.
3273 case SIR_SCRIPT_STOPPED:
3275 * Do we have any target to reset or unit to clear ?
3277 for (i = 0 ; i < SYM_CONF_MAX_TARGET ; i++) {
3278 tp = &np->target[i];
3280 (tp->lun0p && tp->lun0p->to_clear)) {
3286 for (k = 1 ; k < SYM_CONF_MAX_LUN ; k++) {
3287 if (tp->lunmp[k] && tp->lunmp[k]->to_clear) {
3297 * If not, walk the busy queue for any
3298 * disconnected CCB to be aborted.
3301 FOR_EACH_QUEUED_ELEMENT(&np->busy_ccbq, qp) {
3302 cp = sym_que_entry(qp,struct sym_ccb,link_ccbq);
3303 if (cp->host_status != HS_DISCONNECT)
3306 target = cp->target;
3313 * If some target is to be selected,
3314 * prepare and start the selection.
3317 tp = &np->target[target];
3318 np->abrt_sel.sel_id = target;
3319 np->abrt_sel.sel_scntl3 = tp->head.wval;
3320 np->abrt_sel.sel_sxfer = tp->head.sval;
3321 OUTL(np, nc_dsa, np->hcb_ba);
3322 OUTL_DSP(np, SCRIPTB_BA(np, sel_for_abort));
3327 * Now look for a CCB to abort that haven't started yet.
3328 * Btw, the SCRIPTS processor is still stopped, so
3329 * we are not in race.
3333 FOR_EACH_QUEUED_ELEMENT(&np->busy_ccbq, qp) {
3334 cp = sym_que_entry(qp, struct sym_ccb, link_ccbq);
3335 if (cp->host_status != HS_BUSY &&
3336 cp->host_status != HS_NEGOTIATE)
3340 #ifdef SYM_CONF_IARB_SUPPORT
3342 * If we are using IMMEDIATE ARBITRATION, we donnot
3343 * want to cancel the last queued CCB, since the
3344 * SCRIPTS may have anticipated the selection.
3346 if (cp == np->last_cp) {
3351 i = 1; /* Means we have found some */
3356 * We are done, so we donnot need
3357 * to synchronize with the SCRIPTS anylonger.
3358 * Remove the SEM flag from the ISTAT.
3361 OUTB(np, nc_istat, SIGP);
3365 * Compute index of next position in the start
3366 * queue the SCRIPTS intends to start and dequeue
3367 * all CCBs for that device that haven't been started.
3369 i = (INL(np, nc_scratcha) - np->squeue_ba) / 4;
3370 i = sym_dequeue_from_squeue(np, i, cp->target, cp->lun, -1);
3373 * Make sure at least our IO to abort has been dequeued.
3375 #ifndef SYM_OPT_HANDLE_DEVICE_QUEUEING
3376 assert(i && sym_get_cam_status(cp->cmd) == DID_SOFT_ERROR);
3378 sym_remque(&cp->link_ccbq);
3379 sym_insque_tail(&cp->link_ccbq, &np->comp_ccbq);
3382 * Keep track in cam status of the reason of the abort.
3384 if (cp->to_abort == 2)
3385 sym_set_cam_status(cp->cmd, DID_TIME_OUT);
3387 sym_set_cam_status(cp->cmd, DID_ABORT);
3390 * Complete with error everything that we have dequeued.
3392 sym_flush_comp_queue(np, 0);
3395 * The SCRIPTS processor has selected a target
3396 * we may have some manual recovery to perform for.
3398 case SIR_TARGET_SELECTED:
3399 target = INB(np, nc_sdid) & 0xf;
3400 tp = &np->target[target];
3402 np->abrt_tbl.addr = cpu_to_scr(vtobus(np->abrt_msg));
3405 * If the target is to be reset, prepare a
3406 * M_RESET message and clear the to_reset flag
3407 * since we donnot expect this operation to fail.
3410 np->abrt_msg[0] = M_RESET;
3411 np->abrt_tbl.size = 1;
3417 * Otherwise, look for some logical unit to be cleared.
3419 if (tp->lun0p && tp->lun0p->to_clear)
3421 else if (tp->lunmp) {
3422 for (k = 1 ; k < SYM_CONF_MAX_LUN ; k++) {
3423 if (tp->lunmp[k] && tp->lunmp[k]->to_clear) {
3431 * If a logical unit is to be cleared, prepare
3432 * an IDENTIFY(lun) + ABORT MESSAGE.
3435 struct sym_lcb *lp = sym_lp(tp, lun);
3436 lp->to_clear = 0; /* We don't expect to fail here */
3437 np->abrt_msg[0] = IDENTIFY(0, lun);
3438 np->abrt_msg[1] = M_ABORT;
3439 np->abrt_tbl.size = 2;
3444 * Otherwise, look for some disconnected job to
3445 * abort for this target.
3449 FOR_EACH_QUEUED_ELEMENT(&np->busy_ccbq, qp) {
3450 cp = sym_que_entry(qp, struct sym_ccb, link_ccbq);
3451 if (cp->host_status != HS_DISCONNECT)
3453 if (cp->target != target)
3457 i = 1; /* Means we have some */
3462 * If we have none, probably since the device has
3463 * completed the command before we won abitration,
3464 * send a M_ABORT message without IDENTIFY.
3465 * According to the specs, the device must just
3466 * disconnect the BUS and not abort any task.
3469 np->abrt_msg[0] = M_ABORT;
3470 np->abrt_tbl.size = 1;
3475 * We have some task to abort.
3476 * Set the IDENTIFY(lun)
3478 np->abrt_msg[0] = IDENTIFY(0, cp->lun);
3481 * If we want to abort an untagged command, we
3482 * will send a IDENTIFY + M_ABORT.
3483 * Otherwise (tagged command), we will send
3484 * a IDENTITFY + task attributes + ABORT TAG.
3486 if (cp->tag == NO_TAG) {
3487 np->abrt_msg[1] = M_ABORT;
3488 np->abrt_tbl.size = 2;
3490 np->abrt_msg[1] = cp->scsi_smsg[1];
3491 np->abrt_msg[2] = cp->scsi_smsg[2];
3492 np->abrt_msg[3] = M_ABORT_TAG;
3493 np->abrt_tbl.size = 4;
3496 * Keep track of software timeout condition, since the
3497 * peripheral driver may not count retries on abort
3498 * conditions not due to timeout.
3500 if (cp->to_abort == 2)
3501 sym_set_cam_status(cp->cmd, DID_TIME_OUT);
3502 cp->to_abort = 0; /* We donnot expect to fail here */
3506 * The target has accepted our message and switched
3507 * to BUS FREE phase as we expected.
3509 case SIR_ABORT_SENT:
3510 target = INB(np, nc_sdid) & 0xf;
3511 tp = &np->target[target];
3512 starget = tp->starget;
3515 ** If we didn't abort anything, leave here.
3517 if (np->abrt_msg[0] == M_ABORT)
3521 * If we sent a M_RESET, then a hardware reset has
3522 * been performed by the target.
3523 * - Reset everything to async 8 bit
3524 * - Tell ourself to negotiate next time :-)
3525 * - Prepare to clear all disconnected CCBs for
3526 * this target from our task list (lun=task=-1)
3530 if (np->abrt_msg[0] == M_RESET) {
3532 tp->head.wval = np->rv_scntl3;
3534 spi_period(starget) = 0;
3535 spi_offset(starget) = 0;
3536 spi_width(starget) = 0;
3537 spi_iu(starget) = 0;
3538 spi_dt(starget) = 0;
3539 spi_qas(starget) = 0;
3540 tp->tgoal.check_nego = 1;
3544 * Otherwise, check for the LUN and TASK(s)
3545 * concerned by the cancelation.
3546 * If it is not ABORT_TAG then it is CLEAR_QUEUE
3547 * or an ABORT message :-)
3550 lun = np->abrt_msg[0] & 0x3f;
3551 if (np->abrt_msg[1] == M_ABORT_TAG)
3552 task = np->abrt_msg[2];
3556 * Complete all the CCBs the device should have
3557 * aborted due to our 'kiss of death' message.
3559 i = (INL(np, nc_scratcha) - np->squeue_ba) / 4;
3560 sym_dequeue_from_squeue(np, i, target, lun, -1);
3561 sym_clear_tasks(np, DID_ABORT, target, lun, task);
3562 sym_flush_comp_queue(np, 0);
3565 * If we sent a BDR, make upper layer aware of that.
3567 if (np->abrt_msg[0] == M_RESET)
3568 sym_xpt_async_sent_bdr(np, target);
3573 * Print to the log the message we intend to send.
3575 if (num == SIR_TARGET_SELECTED) {
3576 dev_info(&tp->starget->dev, "control msgout:");
3577 sym_printl_hex(np->abrt_msg, np->abrt_tbl.size);
3578 np->abrt_tbl.size = cpu_to_scr(np->abrt_tbl.size);
3582 * Let the SCRIPTS processor continue.
3588 * Gerard's alchemy:) that deals with with the data
3589 * pointer for both MDP and the residual calculation.
3591 * I didn't want to bloat the code by more than 200
3592 * lines for the handling of both MDP and the residual.
3593 * This has been achieved by using a data pointer
3594 * representation consisting in an index in the data
3595 * array (dp_sg) and a negative offset (dp_ofs) that
3596 * have the following meaning:
3598 * - dp_sg = SYM_CONF_MAX_SG
3599 * we are at the end of the data script.
3600 * - dp_sg < SYM_CONF_MAX_SG
3601 * dp_sg points to the next entry of the scatter array
3602 * we want to transfer.
3604 * dp_ofs represents the residual of bytes of the
3605 * previous entry scatter entry we will send first.
3607 * no residual to send first.
3609 * The function sym_evaluate_dp() accepts an arbitray
3610 * offset (basically from the MDP message) and returns
3611 * the corresponding values of dp_sg and dp_ofs.
3614 static int sym_evaluate_dp(struct sym_hcb *np, struct sym_ccb *cp, u32 scr, int *ofs)
3617 int dp_ofs, dp_sg, dp_sgmin;
3622 * Compute the resulted data pointer in term of a script
3623 * address within some DATA script and a signed byte offset.
3627 if (dp_scr == SCRIPTA_BA(np, pm0_data))
3629 else if (dp_scr == SCRIPTA_BA(np, pm1_data))
3635 dp_scr = scr_to_cpu(pm->ret);
3636 dp_ofs -= scr_to_cpu(pm->sg.size);
3640 * If we are auto-sensing, then we are done.
3642 if (cp->host_flags & HF_SENSE) {
3648 * Deduce the index of the sg entry.
3649 * Keep track of the index of the first valid entry.
3650 * If result is dp_sg = SYM_CONF_MAX_SG, then we are at the
3653 tmp = scr_to_cpu(sym_goalp(cp));
3654 dp_sg = SYM_CONF_MAX_SG;
3656 dp_sg -= (tmp - 8 - (int)dp_scr) / (2*4);
3657 dp_sgmin = SYM_CONF_MAX_SG - cp->segments;
3660 * Move to the sg entry the data pointer belongs to.
3662 * If we are inside the data area, we expect result to be:
3665 * dp_ofs = 0 and dp_sg is the index of the sg entry
3666 * the data pointer belongs to (or the end of the data)
3668 * dp_ofs < 0 and dp_sg is the index of the sg entry
3669 * the data pointer belongs to + 1.
3673 while (dp_sg > dp_sgmin) {
3675 tmp = scr_to_cpu(cp->phys.data[dp_sg].size);
3676 n = dp_ofs + (tmp & 0xffffff);
3684 else if (dp_ofs > 0) {
3685 while (dp_sg < SYM_CONF_MAX_SG) {
3686 tmp = scr_to_cpu(cp->phys.data[dp_sg].size);
3687 dp_ofs -= (tmp & 0xffffff);
3695 * Make sure the data pointer is inside the data area.
3696 * If not, return some error.
3698 if (dp_sg < dp_sgmin || (dp_sg == dp_sgmin && dp_ofs < 0))
3700 else if (dp_sg > SYM_CONF_MAX_SG ||
3701 (dp_sg == SYM_CONF_MAX_SG && dp_ofs > 0))
3705 * Save the extreme pointer if needed.
3707 if (dp_sg > cp->ext_sg ||
3708 (dp_sg == cp->ext_sg && dp_ofs > cp->ext_ofs)) {
3710 cp->ext_ofs = dp_ofs;
3724 * chip handler for MODIFY DATA POINTER MESSAGE
3726 * We also call this function on IGNORE WIDE RESIDUE
3727 * messages that do not match a SWIDE full condition.
3728 * Btw, we assume in that situation that such a message
3729 * is equivalent to a MODIFY DATA POINTER (offset=-1).
3732 static void sym_modify_dp(struct sym_hcb *np, struct sym_tcb *tp, struct sym_ccb *cp, int ofs)
3735 u32 dp_scr = sym_get_script_dp (np, cp);
3743 * Not supported for auto-sense.
3745 if (cp->host_flags & HF_SENSE)
3749 * Apply our alchemy:) (see comments in sym_evaluate_dp()),
3750 * to the resulted data pointer.
3752 dp_sg = sym_evaluate_dp(np, cp, dp_scr, &dp_ofs);
3757 * And our alchemy:) allows to easily calculate the data
3758 * script address we want to return for the next data phase.
3760 dp_ret = cpu_to_scr(sym_goalp(cp));
3761 dp_ret = dp_ret - 8 - (SYM_CONF_MAX_SG - dp_sg) * (2*4);
3764 * If offset / scatter entry is zero we donnot need
3765 * a context for the new current data pointer.
3773 * Get a context for the new current data pointer.
3775 hflags = INB(np, HF_PRT);
3777 if (hflags & HF_DP_SAVED)
3778 hflags ^= HF_ACT_PM;
3780 if (!(hflags & HF_ACT_PM)) {
3782 dp_scr = SCRIPTA_BA(np, pm0_data);
3786 dp_scr = SCRIPTA_BA(np, pm1_data);
3789 hflags &= ~(HF_DP_SAVED);
3791 OUTB(np, HF_PRT, hflags);
3794 * Set up the new current data pointer.
3795 * ofs < 0 there, and for the next data phase, we
3796 * want to transfer part of the data of the sg entry
3797 * corresponding to index dp_sg-1 prior to returning
3798 * to the main data script.
3800 pm->ret = cpu_to_scr(dp_ret);
3801 tmp = scr_to_cpu(cp->phys.data[dp_sg-1].addr);
3802 tmp += scr_to_cpu(cp->phys.data[dp_sg-1].size) + dp_ofs;
3803 pm->sg.addr = cpu_to_scr(tmp);
3804 pm->sg.size = cpu_to_scr(-dp_ofs);
3807 sym_set_script_dp (np, cp, dp_scr);
3808 OUTL_DSP(np, SCRIPTA_BA(np, clrack));
3812 OUTL_DSP(np, SCRIPTB_BA(np, msg_bad));
3817 * chip calculation of the data residual.
3819 * As I used to say, the requirement of data residual
3820 * in SCSI is broken, useless and cannot be achieved
3821 * without huge complexity.
3822 * But most OSes and even the official CAM require it.
3823 * When stupidity happens to be so widely spread inside
3824 * a community, it gets hard to convince.
3826 * Anyway, I don't care, since I am not going to use
3827 * any software that considers this data residual as
3828 * a relevant information. :)
3831 int sym_compute_residual(struct sym_hcb *np, struct sym_ccb *cp)
3833 int dp_sg, dp_sgmin, resid = 0;
3837 * Check for some data lost or just thrown away.
3838 * We are not required to be quite accurate in this
3839 * situation. Btw, if we are odd for output and the
3840 * device claims some more data, it may well happen
3841 * than our residual be zero. :-)
3843 if (cp->xerr_status & (XE_EXTRA_DATA|XE_SODL_UNRUN|XE_SWIDE_OVRUN)) {
3844 if (cp->xerr_status & XE_EXTRA_DATA)
3845 resid -= cp->extra_bytes;
3846 if (cp->xerr_status & XE_SODL_UNRUN)
3848 if (cp->xerr_status & XE_SWIDE_OVRUN)
3853 * If all data has been transferred,
3854 * there is no residual.
3856 if (cp->phys.head.lastp == sym_goalp(cp))
3860 * If no data transfer occurs, or if the data
3861 * pointer is weird, return full residual.
3863 if (cp->startp == cp->phys.head.lastp ||
3864 sym_evaluate_dp(np, cp, scr_to_cpu(cp->phys.head.lastp),
3866 return cp->data_len;
3870 * If we were auto-sensing, then we are done.
3872 if (cp->host_flags & HF_SENSE) {
3877 * We are now full comfortable in the computation
3878 * of the data residual (2's complement).
3880 dp_sgmin = SYM_CONF_MAX_SG - cp->segments;
3881 resid = -cp->ext_ofs;
3882 for (dp_sg = cp->ext_sg; dp_sg < SYM_CONF_MAX_SG; ++dp_sg) {
3883 u_int tmp = scr_to_cpu(cp->phys.data[dp_sg].size);
3884 resid += (tmp & 0xffffff);
3887 resid -= cp->odd_byte_adjustment;
3890 * Hopefully, the result is not too wrong.
3896 * Negotiation for WIDE and SYNCHRONOUS DATA TRANSFER.
3898 * When we try to negotiate, we append the negotiation message
3899 * to the identify and (maybe) simple tag message.
3900 * The host status field is set to HS_NEGOTIATE to mark this
3903 * If the target doesn't answer this message immediately
3904 * (as required by the standard), the SIR_NEGO_FAILED interrupt
3905 * will be raised eventually.
3906 * The handler removes the HS_NEGOTIATE status, and sets the
3907 * negotiated value to the default (async / nowide).
3909 * If we receive a matching answer immediately, we check it
3910 * for validity, and set the values.
3912 * If we receive a Reject message immediately, we assume the
3913 * negotiation has failed, and fall back to standard values.
3915 * If we receive a negotiation message while not in HS_NEGOTIATE
3916 * state, it's a target initiated negotiation. We prepare a
3917 * (hopefully) valid answer, set our parameters, and send back
3918 * this answer to the target.
3920 * If the target doesn't fetch the answer (no message out phase),
3921 * we assume the negotiation has failed, and fall back to default
3922 * settings (SIR_NEGO_PROTO interrupt).
3924 * When we set the values, we adjust them in all ccbs belonging
3925 * to this target, in the controller's register, and in the "phys"
3926 * field of the controller's struct sym_hcb.
3930 * chip handler for SYNCHRONOUS DATA TRANSFER REQUEST (SDTR) message.
3933 sym_sync_nego_check(struct sym_hcb *np, int req, struct sym_ccb *cp)
3935 int target = cp->target;
3936 u_char chg, ofs, per, fak, div;
3938 if (DEBUG_FLAGS & DEBUG_NEGO) {
3939 sym_print_nego_msg(np, target, "sync msgin", np->msgin);
3943 * Get requested values.
3950 * Check values against our limits.
3953 if (ofs > np->maxoffs)
3954 {chg = 1; ofs = np->maxoffs;}
3958 if (per < np->minsync)
3959 {chg = 1; per = np->minsync;}
3963 * Get new chip synchronous parameters value.
3966 if (ofs && sym_getsync(np, 0, per, &div, &fak) < 0)
3969 if (DEBUG_FLAGS & DEBUG_NEGO) {
3970 sym_print_addr(cp->cmd,
3971 "sdtr: ofs=%d per=%d div=%d fak=%d chg=%d.\n",
3972 ofs, per, div, fak, chg);
3976 * If it was an answer we want to change,
3977 * then it isn't acceptable. Reject it.
3985 sym_setsync (np, target, ofs, per, div, fak);
3988 * It was an answer. We are done.
3994 * It was a request. Prepare an answer message.
3996 np->msgout[0] = M_EXTENDED;
3998 np->msgout[2] = M_X_SYNC_REQ;
3999 np->msgout[3] = per;
4000 np->msgout[4] = ofs;
4002 if (DEBUG_FLAGS & DEBUG_NEGO) {
4003 sym_print_nego_msg(np, target, "sync msgout", np->msgout);
4006 np->msgin [0] = M_NOOP;
4011 sym_setsync (np, target, 0, 0, 0, 0);
4015 static void sym_sync_nego(struct sym_hcb *np, struct sym_tcb *tp, struct sym_ccb *cp)
4021 * Request or answer ?
4023 if (INB(np, HS_PRT) == HS_NEGOTIATE) {
4024 OUTB(np, HS_PRT, HS_BUSY);
4025 if (cp->nego_status && cp->nego_status != NS_SYNC)
4031 * Check and apply new values.
4033 result = sym_sync_nego_check(np, req, cp);
4034 if (result) /* Not acceptable, reject it */
4036 if (req) { /* Was a request, send response. */
4037 cp->nego_status = NS_SYNC;
4038 OUTL_DSP(np, SCRIPTB_BA(np, sdtr_resp));
4040 else /* Was a response, we are done. */
4041 OUTL_DSP(np, SCRIPTA_BA(np, clrack));
4045 OUTL_DSP(np, SCRIPTB_BA(np, msg_bad));
4049 * chip handler for PARALLEL PROTOCOL REQUEST (PPR) message.
4052 sym_ppr_nego_check(struct sym_hcb *np, int req, int target)
4054 struct sym_tcb *tp = &np->target[target];
4055 unsigned char fak, div;
4058 unsigned char per = np->msgin[3];
4059 unsigned char ofs = np->msgin[5];
4060 unsigned char wide = np->msgin[6];
4061 unsigned char opts = np->msgin[7] & PPR_OPT_MASK;
4063 if (DEBUG_FLAGS & DEBUG_NEGO) {
4064 sym_print_nego_msg(np, target, "ppr msgin", np->msgin);
4068 * Check values against our limits.
4070 if (wide > np->maxwide) {
4074 if (!wide || !(np->features & FE_U3EN))
4077 if (opts != (np->msgin[7] & PPR_OPT_MASK))
4080 dt = opts & PPR_OPT_DT;
4083 unsigned char maxoffs = dt ? np->maxoffs_dt : np->maxoffs;
4084 if (ofs > maxoffs) {
4091 unsigned char minsync = dt ? np->minsync_dt : np->minsync;
4092 if (per < minsync) {
4099 * Get new chip synchronous parameters value.
4102 if (ofs && sym_getsync(np, dt, per, &div, &fak) < 0)
4106 * If it was an answer we want to change,
4107 * then it isn't acceptable. Reject it.
4115 sym_setpprot(np, target, opts, ofs, per, wide, div, fak);
4118 * It was an answer. We are done.
4124 * It was a request. Prepare an answer message.
4126 np->msgout[0] = M_EXTENDED;
4128 np->msgout[2] = M_X_PPR_REQ;
4129 np->msgout[3] = per;
4131 np->msgout[5] = ofs;
4132 np->msgout[6] = wide;
4133 np->msgout[7] = opts;
4135 if (DEBUG_FLAGS & DEBUG_NEGO) {
4136 sym_print_nego_msg(np, target, "ppr msgout", np->msgout);
4139 np->msgin [0] = M_NOOP;
4144 sym_setpprot (np, target, 0, 0, 0, 0, 0, 0);
4146 * If it is a device response that should result in
4147 * ST, we may want to try a legacy negotiation later.
4149 if (!req && !opts) {
4150 tp->tgoal.period = per;
4151 tp->tgoal.offset = ofs;
4152 tp->tgoal.width = wide;
4153 tp->tgoal.iu = tp->tgoal.dt = tp->tgoal.qas = 0;
4154 tp->tgoal.check_nego = 1;
4159 static void sym_ppr_nego(struct sym_hcb *np, struct sym_tcb *tp, struct sym_ccb *cp)
4165 * Request or answer ?
4167 if (INB(np, HS_PRT) == HS_NEGOTIATE) {
4168 OUTB(np, HS_PRT, HS_BUSY);
4169 if (cp->nego_status && cp->nego_status != NS_PPR)
4175 * Check and apply new values.
4177 result = sym_ppr_nego_check(np, req, cp->target);
4178 if (result) /* Not acceptable, reject it */
4180 if (req) { /* Was a request, send response. */
4181 cp->nego_status = NS_PPR;
4182 OUTL_DSP(np, SCRIPTB_BA(np, ppr_resp));
4184 else /* Was a response, we are done. */
4185 OUTL_DSP(np, SCRIPTA_BA(np, clrack));
4189 OUTL_DSP(np, SCRIPTB_BA(np, msg_bad));
4193 * chip handler for WIDE DATA TRANSFER REQUEST (WDTR) message.
4196 sym_wide_nego_check(struct sym_hcb *np, int req, struct sym_ccb *cp)
4198 int target = cp->target;
4201 if (DEBUG_FLAGS & DEBUG_NEGO) {
4202 sym_print_nego_msg(np, target, "wide msgin", np->msgin);
4206 * Get requested values.
4209 wide = np->msgin[3];
4212 * Check values against our limits.
4214 if (wide > np->maxwide) {
4219 if (DEBUG_FLAGS & DEBUG_NEGO) {
4220 sym_print_addr(cp->cmd, "wdtr: wide=%d chg=%d.\n",
4225 * If it was an answer we want to change,
4226 * then it isn't acceptable. Reject it.
4234 sym_setwide (np, target, wide);
4237 * It was an answer. We are done.
4243 * It was a request. Prepare an answer message.
4245 np->msgout[0] = M_EXTENDED;
4247 np->msgout[2] = M_X_WIDE_REQ;
4248 np->msgout[3] = wide;
4250 np->msgin [0] = M_NOOP;
4252 if (DEBUG_FLAGS & DEBUG_NEGO) {
4253 sym_print_nego_msg(np, target, "wide msgout", np->msgout);
4262 static void sym_wide_nego(struct sym_hcb *np, struct sym_tcb *tp, struct sym_ccb *cp)
4268 * Request or answer ?
4270 if (INB(np, HS_PRT) == HS_NEGOTIATE) {
4271 OUTB(np, HS_PRT, HS_BUSY);
4272 if (cp->nego_status && cp->nego_status != NS_WIDE)
4278 * Check and apply new values.
4280 result = sym_wide_nego_check(np, req, cp);
4281 if (result) /* Not acceptable, reject it */
4283 if (req) { /* Was a request, send response. */
4284 cp->nego_status = NS_WIDE;
4285 OUTL_DSP(np, SCRIPTB_BA(np, wdtr_resp));
4286 } else { /* Was a response. */
4288 * Negotiate for SYNC immediately after WIDE response.
4289 * This allows to negotiate for both WIDE and SYNC on
4290 * a single SCSI command (Suggested by Justin Gibbs).
4292 if (tp->tgoal.offset) {
4293 np->msgout[0] = M_EXTENDED;
4295 np->msgout[2] = M_X_SYNC_REQ;
4296 np->msgout[3] = tp->tgoal.period;
4297 np->msgout[4] = tp->tgoal.offset;
4299 if (DEBUG_FLAGS & DEBUG_NEGO) {
4300 sym_print_nego_msg(np, cp->target,
4301 "sync msgout", np->msgout);
4304 cp->nego_status = NS_SYNC;
4305 OUTB(np, HS_PRT, HS_NEGOTIATE);
4306 OUTL_DSP(np, SCRIPTB_BA(np, sdtr_resp));
4309 OUTL_DSP(np, SCRIPTA_BA(np, clrack));
4315 OUTL_DSP(np, SCRIPTB_BA(np, msg_bad));
4319 * Reset DT, SYNC or WIDE to default settings.
4321 * Called when a negotiation does not succeed either
4322 * on rejection or on protocol error.
4324 * A target that understands a PPR message should never
4325 * reject it, and messing with it is very unlikely.
4326 * So, if a PPR makes problems, we may just want to
4327 * try a legacy negotiation later.
4329 static void sym_nego_default(struct sym_hcb *np, struct sym_tcb *tp, struct sym_ccb *cp)
4331 switch (cp->nego_status) {
4334 sym_setpprot (np, cp->target, 0, 0, 0, 0, 0, 0);
4336 if (tp->tgoal.period < np->minsync)
4337 tp->tgoal.period = np->minsync;
4338 if (tp->tgoal.offset > np->maxoffs)
4339 tp->tgoal.offset = np->maxoffs;
4340 tp->tgoal.iu = tp->tgoal.dt = tp->tgoal.qas = 0;
4341 tp->tgoal.check_nego = 1;
4345 sym_setsync (np, cp->target, 0, 0, 0, 0);
4348 sym_setwide (np, cp->target, 0);
4351 np->msgin [0] = M_NOOP;
4352 np->msgout[0] = M_NOOP;
4353 cp->nego_status = 0;
4357 * chip handler for MESSAGE REJECT received in response to
4358 * PPR, WIDE or SYNCHRONOUS negotiation.
4360 static void sym_nego_rejected(struct sym_hcb *np, struct sym_tcb *tp, struct sym_ccb *cp)
4362 sym_nego_default(np, tp, cp);
4363 OUTB(np, HS_PRT, HS_BUSY);
4367 * chip exception handler for programmed interrupts.
4369 static void sym_int_sir (struct sym_hcb *np)
4371 u_char num = INB(np, nc_dsps);
4372 u32 dsa = INL(np, nc_dsa);
4373 struct sym_ccb *cp = sym_ccb_from_dsa(np, dsa);
4374 u_char target = INB(np, nc_sdid) & 0x0f;
4375 struct sym_tcb *tp = &np->target[target];
4378 if (DEBUG_FLAGS & DEBUG_TINY) printf ("I#%d", num);
4381 #if SYM_CONF_DMA_ADDRESSING_MODE == 2
4383 * SCRIPTS tell us that we may have to update
4384 * 64 bit DMA segment registers.
4386 case SIR_DMAP_DIRTY:
4387 sym_update_dmap_regs(np);
4391 * Command has been completed with error condition
4392 * or has been auto-sensed.
4394 case SIR_COMPLETE_ERROR:
4395 sym_complete_error(np, cp);
4398 * The C code is currently trying to recover from something.
4399 * Typically, user want to abort some command.
4401 case SIR_SCRIPT_STOPPED:
4402 case SIR_TARGET_SELECTED:
4403 case SIR_ABORT_SENT:
4404 sym_sir_task_recovery(np, num);
4407 * The device didn't go to MSG OUT phase after having
4408 * been selected with ATN. We donnot want to handle
4411 case SIR_SEL_ATN_NO_MSG_OUT:
4412 printf ("%s:%d: No MSG OUT phase after selection with ATN.\n",
4413 sym_name (np), target);
4416 * The device didn't switch to MSG IN phase after
4417 * having reseleted the initiator.
4419 case SIR_RESEL_NO_MSG_IN:
4420 printf ("%s:%d: No MSG IN phase after reselection.\n",
4421 sym_name (np), target);
4424 * After reselection, the device sent a message that wasn't
4427 case SIR_RESEL_NO_IDENTIFY:
4428 printf ("%s:%d: No IDENTIFY after reselection.\n",
4429 sym_name (np), target);
4432 * The device reselected a LUN we donnot know about.
4434 case SIR_RESEL_BAD_LUN:
4435 np->msgout[0] = M_RESET;
4438 * The device reselected for an untagged nexus and we
4441 case SIR_RESEL_BAD_I_T_L:
4442 np->msgout[0] = M_ABORT;
4445 * The device reselected for a tagged nexus that we donnot
4448 case SIR_RESEL_BAD_I_T_L_Q:
4449 np->msgout[0] = M_ABORT_TAG;
4452 * The SCRIPTS let us know that the device has grabbed
4453 * our message and will abort the job.
4455 case SIR_RESEL_ABORTED:
4456 np->lastmsg = np->msgout[0];
4457 np->msgout[0] = M_NOOP;
4458 printf ("%s:%d: message %x sent on bad reselection.\n",
4459 sym_name (np), target, np->lastmsg);
4462 * The SCRIPTS let us know that a message has been
4463 * successfully sent to the device.
4465 case SIR_MSG_OUT_DONE:
4466 np->lastmsg = np->msgout[0];
4467 np->msgout[0] = M_NOOP;
4468 /* Should we really care of that */
4469 if (np->lastmsg == M_PARITY || np->lastmsg == M_ID_ERROR) {
4471 cp->xerr_status &= ~XE_PARITY_ERR;
4472 if (!cp->xerr_status)
4473 OUTOFFB(np, HF_PRT, HF_EXT_ERR);
4478 * The device didn't send a GOOD SCSI status.
4479 * We may have some work to do prior to allow
4480 * the SCRIPTS processor to continue.
4482 case SIR_BAD_SCSI_STATUS:
4485 sym_sir_bad_scsi_status(np, num, cp);
4488 * We are asked by the SCRIPTS to prepare a
4491 case SIR_REJECT_TO_SEND:
4492 sym_print_msg(cp, "M_REJECT to send for ", np->msgin);
4493 np->msgout[0] = M_REJECT;
4496 * We have been ODD at the end of a DATA IN
4497 * transfer and the device didn't send a
4498 * IGNORE WIDE RESIDUE message.
4499 * It is a data overrun condition.
4501 case SIR_SWIDE_OVERRUN:
4503 OUTONB(np, HF_PRT, HF_EXT_ERR);
4504 cp->xerr_status |= XE_SWIDE_OVRUN;
4508 * We have been ODD at the end of a DATA OUT
4510 * It is a data underrun condition.
4512 case SIR_SODL_UNDERRUN:
4514 OUTONB(np, HF_PRT, HF_EXT_ERR);
4515 cp->xerr_status |= XE_SODL_UNRUN;
4519 * The device wants us to tranfer more data than
4520 * expected or in the wrong direction.
4521 * The number of extra bytes is in scratcha.
4522 * It is a data overrun condition.
4524 case SIR_DATA_OVERRUN:
4526 OUTONB(np, HF_PRT, HF_EXT_ERR);
4527 cp->xerr_status |= XE_EXTRA_DATA;
4528 cp->extra_bytes += INL(np, nc_scratcha);
4532 * The device switched to an illegal phase (4/5).
4536 OUTONB(np, HF_PRT, HF_EXT_ERR);
4537 cp->xerr_status |= XE_BAD_PHASE;
4541 * We received a message.
4543 case SIR_MSG_RECEIVED:
4546 switch (np->msgin [0]) {
4548 * We received an extended message.
4549 * We handle MODIFY DATA POINTER, SDTR, WDTR
4550 * and reject all other extended messages.
4553 switch (np->msgin [2]) {
4555 if (DEBUG_FLAGS & DEBUG_POINTER)
4556 sym_print_msg(cp,"modify DP",np->msgin);
4557 tmp = (np->msgin[3]<<24) + (np->msgin[4]<<16) +
4558 (np->msgin[5]<<8) + (np->msgin[6]);
4559 sym_modify_dp(np, tp, cp, tmp);
4562 sym_sync_nego(np, tp, cp);
4565 sym_ppr_nego(np, tp, cp);
4568 sym_wide_nego(np, tp, cp);
4575 * We received a 1/2 byte message not handled from SCRIPTS.
4576 * We are only expecting MESSAGE REJECT and IGNORE WIDE
4577 * RESIDUE messages that haven't been anticipated by
4578 * SCRIPTS on SWIDE full condition. Unanticipated IGNORE
4579 * WIDE RESIDUE messages are aliased as MODIFY DP (-1).
4582 if (DEBUG_FLAGS & DEBUG_POINTER)
4583 sym_print_msg(cp,"ign wide residue", np->msgin);
4584 if (cp->host_flags & HF_SENSE)
4585 OUTL_DSP(np, SCRIPTA_BA(np, clrack));
4587 sym_modify_dp(np, tp, cp, -1);
4590 if (INB(np, HS_PRT) == HS_NEGOTIATE)
4591 sym_nego_rejected(np, tp, cp);
4593 sym_print_addr(cp->cmd,
4594 "M_REJECT received (%x:%x).\n",
4595 scr_to_cpu(np->lastmsg), np->msgout[0]);
4604 * We received an unknown message.
4605 * Ignore all MSG IN phases and reject it.
4608 sym_print_msg(cp, "WEIRD message received", np->msgin);
4609 OUTL_DSP(np, SCRIPTB_BA(np, msg_weird));
4612 * Negotiation failed.
4613 * Target does not send us the reply.
4614 * Remove the HS_NEGOTIATE status.
4616 case SIR_NEGO_FAILED:
4617 OUTB(np, HS_PRT, HS_BUSY);
4619 * Negotiation failed.
4620 * Target does not want answer message.
4622 case SIR_NEGO_PROTO:
4623 sym_nego_default(np, tp, cp);
4631 OUTL_DSP(np, SCRIPTB_BA(np, msg_bad));
4634 OUTL_DSP(np, SCRIPTA_BA(np, clrack));
4641 * Acquire a control block
4643 struct sym_ccb *sym_get_ccb (struct sym_hcb *np, struct scsi_cmnd *cmd, u_char tag_order)
4645 u_char tn = cmd->device->id;
4646 u_char ln = cmd->device->lun;
4647 struct sym_tcb *tp = &np->target[tn];
4648 struct sym_lcb *lp = sym_lp(tp, ln);
4649 u_short tag = NO_TAG;
4651 struct sym_ccb *cp = NULL;
4654 * Look for a free CCB
4656 if (sym_que_empty(&np->free_ccbq))
4658 qp = sym_remque_head(&np->free_ccbq);
4661 cp = sym_que_entry(qp, struct sym_ccb, link_ccbq);
4663 #ifndef SYM_OPT_HANDLE_DEVICE_QUEUEING
4665 * If the LCB is not yet available and the LUN
4666 * has been probed ok, try to allocate the LCB.
4668 if (!lp && sym_is_bit(tp->lun_map, ln)) {
4669 lp = sym_alloc_lcb(np, tn, ln);
4676 * If the LCB is not available here, then the
4677 * logical unit is not yet discovered. For those
4678 * ones only accept 1 SCSI IO per logical unit,
4679 * since we cannot allow disconnections.
4682 if (!sym_is_bit(tp->busy0_map, ln))
4683 sym_set_bit(tp->busy0_map, ln);
4688 * If we have been asked for a tagged command.
4692 * Debugging purpose.
4694 #ifndef SYM_OPT_HANDLE_DEVICE_QUEUEING
4695 assert(lp->busy_itl == 0);
4698 * Allocate resources for tags if not yet.
4701 sym_alloc_lcb_tags(np, tn, ln);
4706 * Get a tag for this SCSI IO and set up
4707 * the CCB bus address for reselection,
4708 * and count it for this LUN.
4709 * Toggle reselect path to tagged.
4711 if (lp->busy_itlq < SYM_CONF_MAX_TASK) {
4712 tag = lp->cb_tags[lp->ia_tag];
4713 if (++lp->ia_tag == SYM_CONF_MAX_TASK)
4716 #ifndef SYM_OPT_HANDLE_DEVICE_QUEUEING
4717 lp->itlq_tbl[tag] = cpu_to_scr(cp->ccb_ba);
4719 cpu_to_scr(SCRIPTA_BA(np, resel_tag));
4721 #ifdef SYM_OPT_LIMIT_COMMAND_REORDERING
4722 cp->tags_si = lp->tags_si;
4723 ++lp->tags_sum[cp->tags_si];
4731 * This command will not be tagged.
4732 * If we already have either a tagged or untagged
4733 * one, refuse to overlap this untagged one.
4737 * Debugging purpose.
4739 #ifndef SYM_OPT_HANDLE_DEVICE_QUEUEING
4740 assert(lp->busy_itl == 0 && lp->busy_itlq == 0);
4743 * Count this nexus for this LUN.
4744 * Set up the CCB bus address for reselection.
4745 * Toggle reselect path to untagged.
4748 #ifndef SYM_OPT_HANDLE_DEVICE_QUEUEING
4749 if (lp->busy_itl == 1) {
4750 lp->head.itl_task_sa = cpu_to_scr(cp->ccb_ba);
4752 cpu_to_scr(SCRIPTA_BA(np, resel_no_tag));
4760 * Put the CCB into the busy queue.
4762 sym_insque_tail(&cp->link_ccbq, &np->busy_ccbq);
4763 #ifdef SYM_OPT_HANDLE_DEVICE_QUEUEING
4765 sym_remque(&cp->link2_ccbq);
4766 sym_insque_tail(&cp->link2_ccbq, &lp->waiting_ccbq);
4771 cp->odd_byte_adjustment = 0;
4773 cp->order = tag_order;
4777 if (DEBUG_FLAGS & DEBUG_TAGS) {
4778 sym_print_addr(cmd, "ccb @%p using tag %d.\n", cp, tag);
4784 sym_insque_head(&cp->link_ccbq, &np->free_ccbq);
4789 * Release one control block
4791 void sym_free_ccb (struct sym_hcb *np, struct sym_ccb *cp)
4793 struct sym_tcb *tp = &np->target[cp->target];
4794 struct sym_lcb *lp = sym_lp(tp, cp->lun);
4796 if (DEBUG_FLAGS & DEBUG_TAGS) {
4797 sym_print_addr(cp->cmd, "ccb @%p freeing tag %d.\n",
4806 * If tagged, release the tag, set the relect path
4808 if (cp->tag != NO_TAG) {
4809 #ifdef SYM_OPT_LIMIT_COMMAND_REORDERING
4810 --lp->tags_sum[cp->tags_si];
4813 * Free the tag value.
4815 lp->cb_tags[lp->if_tag] = cp->tag;
4816 if (++lp->if_tag == SYM_CONF_MAX_TASK)
4819 * Make the reselect path invalid,
4820 * and uncount this CCB.
4822 lp->itlq_tbl[cp->tag] = cpu_to_scr(np->bad_itlq_ba);
4824 } else { /* Untagged */
4826 * Make the reselect path invalid,
4827 * and uncount this CCB.
4829 lp->head.itl_task_sa = cpu_to_scr(np->bad_itl_ba);
4833 * If no JOB active, make the LUN reselect path invalid.
4835 if (lp->busy_itlq == 0 && lp->busy_itl == 0)
4837 cpu_to_scr(SCRIPTB_BA(np, resel_bad_lun));
4840 * Otherwise, we only accept 1 IO per LUN.
4841 * Clear the bit that keeps track of this IO.
4844 sym_clr_bit(tp->busy0_map, cp->lun);
4847 * We donnot queue more than 1 ccb per target
4848 * with negotiation at any time. If this ccb was
4849 * used for negotiation, clear this info in the tcb.
4851 if (cp == tp->nego_cp)
4854 #ifdef SYM_CONF_IARB_SUPPORT
4856 * If we just complete the last queued CCB,
4857 * clear this info that is no longer relevant.
4859 if (cp == np->last_cp)
4864 * Make this CCB available.
4867 cp->host_status = HS_IDLE;
4868 sym_remque(&cp->link_ccbq);
4869 sym_insque_head(&cp->link_ccbq, &np->free_ccbq);
4871 #ifdef SYM_OPT_HANDLE_DEVICE_QUEUEING
4873 sym_remque(&cp->link2_ccbq);
4874 sym_insque_tail(&cp->link2_ccbq, &np->dummy_ccbq);
4876 if (cp->tag != NO_TAG)
4879 --lp->started_no_tag;
4887 * Allocate a CCB from memory and initialize its fixed part.
4889 static struct sym_ccb *sym_alloc_ccb(struct sym_hcb *np)
4891 struct sym_ccb *cp = NULL;
4895 * Prevent from allocating more CCBs than we can
4896 * queue to the controller.
4898 if (np->actccbs >= SYM_CONF_MAX_START)
4902 * Allocate memory for this CCB.
4904 cp = sym_calloc_dma(sizeof(struct sym_ccb), "CCB");
4914 * Compute the bus address of this ccb.
4916 cp->ccb_ba = vtobus(cp);
4919 * Insert this ccb into the hashed list.
4921 hcode = CCB_HASH_CODE(cp->ccb_ba);
4922 cp->link_ccbh = np->ccbh[hcode];
4923 np->ccbh[hcode] = cp;
4926 * Initialyze the start and restart actions.
4928 cp->phys.head.go.start = cpu_to_scr(SCRIPTA_BA(np, idle));
4929 cp->phys.head.go.restart = cpu_to_scr(SCRIPTB_BA(np, bad_i_t_l));
4932 * Initilialyze some other fields.
4934 cp->phys.smsg_ext.addr = cpu_to_scr(HCB_BA(np, msgin[2]));
4937 * Chain into free ccb queue.
4939 sym_insque_head(&cp->link_ccbq, &np->free_ccbq);
4942 * Chain into optionnal lists.
4944 #ifdef SYM_OPT_HANDLE_DEVICE_QUEUEING
4945 sym_insque_head(&cp->link2_ccbq, &np->dummy_ccbq);
4950 sym_mfree_dma(cp, sizeof(*cp), "CCB");
4955 * Look up a CCB from a DSA value.
4957 static struct sym_ccb *sym_ccb_from_dsa(struct sym_hcb *np, u32 dsa)
4962 hcode = CCB_HASH_CODE(dsa);
4963 cp = np->ccbh[hcode];
4965 if (cp->ccb_ba == dsa)
4974 * Target control block initialisation.
4975 * Nothing important to do at the moment.
4977 static void sym_init_tcb (struct sym_hcb *np, u_char tn)
4979 #if 0 /* Hmmm... this checking looks paranoid. */
4981 * Check some alignments required by the chip.
4983 assert (((offsetof(struct sym_reg, nc_sxfer) ^
4984 offsetof(struct sym_tcb, head.sval)) &3) == 0);
4985 assert (((offsetof(struct sym_reg, nc_scntl3) ^
4986 offsetof(struct sym_tcb, head.wval)) &3) == 0);
4991 * Lun control block allocation and initialization.
4993 struct sym_lcb *sym_alloc_lcb (struct sym_hcb *np, u_char tn, u_char ln)
4995 struct sym_tcb *tp = &np->target[tn];
4996 struct sym_lcb *lp = sym_lp(tp, ln);
4999 * Already done, just return.
5005 * Donnot allow LUN control block
5006 * allocation for not probed LUNs.
5008 if (!sym_is_bit(tp->lun_map, ln))
5012 * Initialize the target control block if not yet.
5014 sym_init_tcb (np, tn);
5017 * Allocate the LCB bus address array.
5018 * Compute the bus address of this table.
5020 if (ln && !tp->luntbl) {
5023 tp->luntbl = sym_calloc_dma(256, "LUNTBL");
5026 for (i = 0 ; i < 64 ; i++)
5027 tp->luntbl[i] = cpu_to_scr(vtobus(&np->badlun_sa));
5028 tp->head.luntbl_sa = cpu_to_scr(vtobus(tp->luntbl));
5032 * Allocate the table of pointers for LUN(s) > 0, if needed.
5034 if (ln && !tp->lunmp) {
5035 tp->lunmp = kcalloc(SYM_CONF_MAX_LUN, sizeof(struct sym_lcb *),
5043 * Make it available to the chip.
5045 lp = sym_calloc_dma(sizeof(struct sym_lcb), "LCB");
5050 tp->luntbl[ln] = cpu_to_scr(vtobus(lp));
5054 tp->head.lun0_sa = cpu_to_scr(vtobus(lp));
5058 * Let the itl task point to error handling.
5060 lp->head.itl_task_sa = cpu_to_scr(np->bad_itl_ba);
5063 * Set the reselect pattern to our default. :)
5065 lp->head.resel_sa = cpu_to_scr(SCRIPTB_BA(np, resel_bad_lun));
5068 * Set user capabilities.
5070 lp->user_flags = tp->usrflags & (SYM_DISC_ENABLED | SYM_TAGS_ENABLED);
5072 #ifdef SYM_OPT_HANDLE_DEVICE_QUEUEING
5074 * Initialize device queueing.
5076 sym_que_init(&lp->waiting_ccbq);
5077 sym_que_init(&lp->started_ccbq);
5078 lp->started_max = SYM_CONF_MAX_TASK;
5079 lp->started_limit = SYM_CONF_MAX_TASK;
5082 * If we are busy, count the IO.
5084 if (sym_is_bit(tp->busy0_map, ln)) {
5086 sym_clr_bit(tp->busy0_map, ln);
5093 * Allocate LCB resources for tagged command queuing.
5095 static void sym_alloc_lcb_tags (struct sym_hcb *np, u_char tn, u_char ln)
5097 struct sym_tcb *tp = &np->target[tn];
5098 struct sym_lcb *lp = sym_lp(tp, ln);
5102 * If LCB not available, try to allocate it.
5104 if (!lp && !(lp = sym_alloc_lcb(np, tn, ln)))
5108 * Allocate the task table and and the tag allocation
5109 * circular buffer. We want both or none.
5111 lp->itlq_tbl = sym_calloc_dma(SYM_CONF_MAX_TASK*4, "ITLQ_TBL");
5114 lp->cb_tags = kcalloc(SYM_CONF_MAX_TASK, 1, GFP_ATOMIC);
5116 sym_mfree_dma(lp->itlq_tbl, SYM_CONF_MAX_TASK*4, "ITLQ_TBL");
5117 lp->itlq_tbl = NULL;
5122 * Initialize the task table with invalid entries.
5124 for (i = 0 ; i < SYM_CONF_MAX_TASK ; i++)
5125 lp->itlq_tbl[i] = cpu_to_scr(np->notask_ba);
5128 * Fill up the tag buffer with tag numbers.
5130 for (i = 0 ; i < SYM_CONF_MAX_TASK ; i++)
5134 * Make the task table available to SCRIPTS,
5135 * And accept tagged commands now.
5137 lp->head.itlq_tbl_sa = cpu_to_scr(vtobus(lp->itlq_tbl));
5145 * Queue a SCSI IO to the controller.
5147 int sym_queue_scsiio(struct sym_hcb *np, struct scsi_cmnd *cmd, struct sym_ccb *cp)
5149 struct scsi_device *sdev = cmd->device;
5157 * Keep track of the IO in our CCB.
5162 * Retrieve the target descriptor.
5164 tp = &np->target[cp->target];
5167 * Retrieve the lun descriptor.
5169 lp = sym_lp(tp, sdev->lun);
5171 can_disconnect = (cp->tag != NO_TAG) ||
5172 (lp && (lp->curr_flags & SYM_DISC_ENABLED));
5174 msgptr = cp->scsi_smsg;
5176 msgptr[msglen++] = IDENTIFY(can_disconnect, sdev->lun);
5179 * Build the tag message if present.
5181 if (cp->tag != NO_TAG) {
5182 u_char order = cp->order;
5190 order = M_SIMPLE_TAG;
5192 #ifdef SYM_OPT_LIMIT_COMMAND_REORDERING
5194 * Avoid too much reordering of SCSI commands.
5195 * The algorithm tries to prevent completion of any
5196 * tagged command from being delayed against more
5197 * than 3 times the max number of queued commands.
5199 if (lp && lp->tags_since > 3*SYM_CONF_MAX_TAG) {
5200 lp->tags_si = !(lp->tags_si);
5201 if (lp->tags_sum[lp->tags_si]) {
5202 order = M_ORDERED_TAG;
5203 if ((DEBUG_FLAGS & DEBUG_TAGS)||sym_verbose>1) {
5205 "ordered tag forced.\n");
5211 msgptr[msglen++] = order;
5214 * For less than 128 tags, actual tags are numbered
5215 * 1,3,5,..2*MAXTAGS+1,since we may have to deal
5216 * with devices that have problems with #TAG 0 or too
5217 * great #TAG numbers. For more tags (up to 256),
5218 * we use directly our tag number.
5220 #if SYM_CONF_MAX_TASK > (512/4)
5221 msgptr[msglen++] = cp->tag;
5223 msgptr[msglen++] = (cp->tag << 1) + 1;
5228 * Build a negotiation message if needed.
5229 * (nego_status is filled by sym_prepare_nego())
5231 cp->nego_status = 0;
5232 if (tp->tgoal.check_nego && !tp->nego_cp && lp) {
5233 msglen += sym_prepare_nego(np, cp, msgptr + msglen);
5239 cp->phys.head.go.start = cpu_to_scr(SCRIPTA_BA(np, select));
5240 cp->phys.head.go.restart = cpu_to_scr(SCRIPTA_BA(np, resel_dsa));
5245 cp->phys.select.sel_id = cp->target;
5246 cp->phys.select.sel_scntl3 = tp->head.wval;
5247 cp->phys.select.sel_sxfer = tp->head.sval;
5248 cp->phys.select.sel_scntl4 = tp->head.uval;
5253 cp->phys.smsg.addr = CCB_BA(cp, scsi_smsg);
5254 cp->phys.smsg.size = cpu_to_scr(msglen);
5259 cp->host_xflags = 0;
5260 cp->host_status = cp->nego_status ? HS_NEGOTIATE : HS_BUSY;
5261 cp->ssss_status = S_ILLEGAL;
5262 cp->xerr_status = 0;
5264 cp->extra_bytes = 0;
5267 * extreme data pointer.
5268 * shall be positive, so -1 is lower than lowest.:)
5274 * Build the CDB and DATA descriptor block
5277 return sym_setup_data_and_start(np, cmd, cp);
5281 * Reset a SCSI target (all LUNs of this target).
5283 int sym_reset_scsi_target(struct sym_hcb *np, int target)
5287 if (target == np->myaddr || (u_int)target >= SYM_CONF_MAX_TARGET)
5290 tp = &np->target[target];
5293 np->istat_sem = SEM;
5294 OUTB(np, nc_istat, SIGP|SEM);
5302 static int sym_abort_ccb(struct sym_hcb *np, struct sym_ccb *cp, int timed_out)
5305 * Check that the IO is active.
5307 if (!cp || !cp->host_status || cp->host_status == HS_WAIT)
5311 * If a previous abort didn't succeed in time,
5312 * perform a BUS reset.
5315 sym_reset_scsi_bus(np, 1);
5320 * Mark the CCB for abort and allow time for.
5322 cp->to_abort = timed_out ? 2 : 1;
5325 * Tell the SCRIPTS processor to stop and synchronize with us.
5327 np->istat_sem = SEM;
5328 OUTB(np, nc_istat, SIGP|SEM);
5332 int sym_abort_scsiio(struct sym_hcb *np, struct scsi_cmnd *cmd, int timed_out)
5338 * Look up our CCB control block.
5341 FOR_EACH_QUEUED_ELEMENT(&np->busy_ccbq, qp) {
5342 struct sym_ccb *cp2 = sym_que_entry(qp, struct sym_ccb, link_ccbq);
5343 if (cp2->cmd == cmd) {
5349 return sym_abort_ccb(np, cp, timed_out);
5353 * Complete execution of a SCSI command with extended
5354 * error, SCSI status error, or having been auto-sensed.
5356 * The SCRIPTS processor is not running there, so we
5357 * can safely access IO registers and remove JOBs from
5359 * SCRATCHA is assumed to have been loaded with STARTPOS
5360 * before the SCRIPTS called the C code.
5362 void sym_complete_error(struct sym_hcb *np, struct sym_ccb *cp)
5364 struct scsi_device *sdev;
5365 struct scsi_cmnd *cmd;
5372 * Paranoid check. :)
5374 if (!cp || !cp->cmd)
5379 if (DEBUG_FLAGS & (DEBUG_TINY|DEBUG_RESULT)) {
5380 dev_info(&sdev->sdev_gendev, "CCB=%p STAT=%x/%x/%x\n", cp,
5381 cp->host_status, cp->ssss_status, cp->host_flags);
5385 * Get target and lun pointers.
5387 tp = &np->target[cp->target];
5388 lp = sym_lp(tp, sdev->lun);
5391 * Check for extended errors.
5393 if (cp->xerr_status) {
5395 sym_print_xerr(cmd, cp->xerr_status);
5396 if (cp->host_status == HS_COMPLETE)
5397 cp->host_status = HS_COMP_ERR;
5401 * Calculate the residual.
5403 resid = sym_compute_residual(np, cp);
5405 if (!SYM_SETUP_RESIDUAL_SUPPORT) {/* If user does not want residuals */
5406 resid = 0; /* throw them away. :) */
5411 printf("XXXX RESID= %d - 0x%x\n", resid, resid);
5415 * Dequeue all queued CCBs for that device
5416 * not yet started by SCRIPTS.
5418 i = (INL(np, nc_scratcha) - np->squeue_ba) / 4;
5419 i = sym_dequeue_from_squeue(np, i, cp->target, sdev->lun, -1);
5422 * Restart the SCRIPTS processor.
5424 OUTL_DSP(np, SCRIPTA_BA(np, start));
5426 #ifdef SYM_OPT_HANDLE_DEVICE_QUEUEING
5427 if (cp->host_status == HS_COMPLETE &&
5428 cp->ssss_status == S_QUEUE_FULL) {
5429 if (!lp || lp->started_tags - i < 2)
5432 * Decrease queue depth as needed.
5434 lp->started_max = lp->started_tags - i - 1;
5437 if (sym_verbose >= 2) {
5438 sym_print_addr(cmd, " queue depth is now %d\n",
5445 cp->host_status = HS_BUSY;
5446 cp->ssss_status = S_ILLEGAL;
5449 * Let's requeue it to device.
5451 sym_set_cam_status(cmd, DID_SOFT_ERROR);
5457 * Build result in CAM ccb.
5459 sym_set_cam_result_error(np, cp, resid);
5461 #ifdef SYM_OPT_HANDLE_DEVICE_QUEUEING
5465 * Add this one to the COMP queue.
5467 sym_remque(&cp->link_ccbq);
5468 sym_insque_head(&cp->link_ccbq, &np->comp_ccbq);
5471 * Complete all those commands with either error
5472 * or requeue condition.
5474 sym_flush_comp_queue(np, 0);
5476 #ifdef SYM_OPT_HANDLE_DEVICE_QUEUEING
5478 * Donnot start more than 1 command after an error.
5481 sym_start_next_ccbs(np, lp, 1);
5486 * Complete execution of a successful SCSI command.
5488 * Only successful commands go to the DONE queue,
5489 * since we need to have the SCRIPTS processor
5490 * stopped on any error condition.
5491 * The SCRIPTS processor is running while we are
5492 * completing successful commands.
5494 void sym_complete_ok (struct sym_hcb *np, struct sym_ccb *cp)
5498 struct scsi_cmnd *cmd;
5502 * Paranoid check. :)
5504 if (!cp || !cp->cmd)
5506 assert (cp->host_status == HS_COMPLETE);
5514 * Get target and lun pointers.
5516 tp = &np->target[cp->target];
5517 lp = sym_lp(tp, cp->lun);
5520 * Assume device discovered on first success.
5523 sym_set_bit(tp->lun_map, cp->lun);
5526 * If all data have been transferred, given than no
5527 * extended error did occur, there is no residual.
5530 if (cp->phys.head.lastp != sym_goalp(cp))
5531 resid = sym_compute_residual(np, cp);
5534 * Wrong transfer residuals may be worse than just always
5535 * returning zero. User can disable this feature in
5536 * sym53c8xx.h. Residual support is enabled by default.
5538 if (!SYM_SETUP_RESIDUAL_SUPPORT)
5542 printf("XXXX RESID= %d - 0x%x\n", resid, resid);
5546 * Build result in CAM ccb.
5548 sym_set_cam_result_ok(cp, cmd, resid);
5550 #ifdef SYM_OPT_SNIFF_INQUIRY
5552 * On standard INQUIRY response (EVPD and CmDt
5553 * not set), sniff out device capabilities.
5555 if (cp->cdb_buf[0] == INQUIRY && !(cp->cdb_buf[1] & 0x3))
5556 sym_sniff_inquiry(np, cmd, resid);
5559 #ifdef SYM_OPT_HANDLE_DEVICE_QUEUEING
5561 * If max number of started ccbs had been reduced,
5562 * increase it if 200 good status received.
5564 if (lp && lp->started_max < lp->started_limit) {
5566 if (lp->num_sgood >= 200) {
5569 if (sym_verbose >= 2) {
5570 sym_print_addr(cmd, " queue depth is now %d\n",
5580 sym_free_ccb (np, cp);
5582 #ifdef SYM_OPT_HANDLE_DEVICE_QUEUEING
5584 * Requeue a couple of awaiting scsi commands.
5586 if (lp && !sym_que_empty(&lp->waiting_ccbq))
5587 sym_start_next_ccbs(np, lp, 2);
5590 * Complete the command.
5592 sym_xpt_done(np, cmd);
5596 * Soft-attach the controller.
5598 int sym_hcb_attach(struct Scsi_Host *shost, struct sym_fw *fw, struct sym_nvram *nvram)
5600 struct sym_hcb *np = sym_get_hcb(shost);
5604 * Get some info about the firmware.
5606 np->scripta_sz = fw->a_size;
5607 np->scriptb_sz = fw->b_size;
5608 np->scriptz_sz = fw->z_size;
5609 np->fw_setup = fw->setup;
5610 np->fw_patch = fw->patch;
5611 np->fw_name = fw->name;
5614 * Save setting of some IO registers, so we will
5615 * be able to probe specific implementations.
5617 sym_save_initial_setting (np);
5620 * Reset the chip now, since it has been reported
5621 * that SCSI clock calibration may not work properly
5622 * if the chip is currently active.
5627 * Prepare controller and devices settings, according
5628 * to chip features, user set-up and driver set-up.
5630 sym_prepare_setting(shost, np, nvram);
5633 * Check the PCI clock frequency.
5634 * Must be performed after prepare_setting since it destroys
5635 * STEST1 that is used to probe for the clock doubler.
5637 i = sym_getpciclock(np);
5638 if (i > 37000 && !(np->features & FE_66MHZ))
5639 printf("%s: PCI BUS clock seems too high: %u KHz.\n",
5643 * Allocate the start queue.
5645 np->squeue = sym_calloc_dma(sizeof(u32)*(MAX_QUEUE*2),"SQUEUE");
5648 np->squeue_ba = vtobus(np->squeue);
5651 * Allocate the done queue.
5653 np->dqueue = sym_calloc_dma(sizeof(u32)*(MAX_QUEUE*2),"DQUEUE");
5656 np->dqueue_ba = vtobus(np->dqueue);
5659 * Allocate the target bus address array.
5661 np->targtbl = sym_calloc_dma(256, "TARGTBL");
5664 np->targtbl_ba = vtobus(np->targtbl);
5667 * Allocate SCRIPTS areas.
5669 np->scripta0 = sym_calloc_dma(np->scripta_sz, "SCRIPTA0");
5670 np->scriptb0 = sym_calloc_dma(np->scriptb_sz, "SCRIPTB0");
5671 np->scriptz0 = sym_calloc_dma(np->scriptz_sz, "SCRIPTZ0");
5672 if (!np->scripta0 || !np->scriptb0 || !np->scriptz0)
5676 * Allocate the array of lists of CCBs hashed by DSA.
5678 np->ccbh = kcalloc(sizeof(struct sym_ccb **), CCB_HASH_SIZE, GFP_KERNEL);
5683 * Initialyze the CCB free and busy queues.
5685 sym_que_init(&np->free_ccbq);
5686 sym_que_init(&np->busy_ccbq);
5687 sym_que_init(&np->comp_ccbq);
5690 * Initialization for optional handling
5691 * of device queueing.
5693 #ifdef SYM_OPT_HANDLE_DEVICE_QUEUEING
5694 sym_que_init(&np->dummy_ccbq);
5697 * Allocate some CCB. We need at least ONE.
5699 if (!sym_alloc_ccb(np))
5703 * Calculate BUS addresses where we are going
5704 * to load the SCRIPTS.
5706 np->scripta_ba = vtobus(np->scripta0);
5707 np->scriptb_ba = vtobus(np->scriptb0);
5708 np->scriptz_ba = vtobus(np->scriptz0);
5711 np->scripta_ba = np->ram_ba;
5712 if (np->features & FE_RAM8K) {
5714 np->scriptb_ba = np->scripta_ba + 4096;
5715 #if 0 /* May get useful for 64 BIT PCI addressing */
5716 np->scr_ram_seg = cpu_to_scr(np->scripta_ba >> 32);
5724 * Copy scripts to controller instance.
5726 memcpy(np->scripta0, fw->a_base, np->scripta_sz);
5727 memcpy(np->scriptb0, fw->b_base, np->scriptb_sz);
5728 memcpy(np->scriptz0, fw->z_base, np->scriptz_sz);
5731 * Setup variable parts in scripts and compute
5732 * scripts bus addresses used from the C code.
5734 np->fw_setup(np, fw);
5737 * Bind SCRIPTS with physical addresses usable by the
5738 * SCRIPTS processor (as seen from the BUS = BUS addresses).
5740 sym_fw_bind_script(np, (u32 *) np->scripta0, np->scripta_sz);
5741 sym_fw_bind_script(np, (u32 *) np->scriptb0, np->scriptb_sz);
5742 sym_fw_bind_script(np, (u32 *) np->scriptz0, np->scriptz_sz);
5744 #ifdef SYM_CONF_IARB_SUPPORT
5746 * If user wants IARB to be set when we win arbitration
5747 * and have other jobs, compute the max number of consecutive
5748 * settings of IARB hints before we leave devices a chance to
5749 * arbitrate for reselection.
5751 #ifdef SYM_SETUP_IARB_MAX
5752 np->iarb_max = SYM_SETUP_IARB_MAX;
5759 * Prepare the idle and invalid task actions.
5761 np->idletask.start = cpu_to_scr(SCRIPTA_BA(np, idle));
5762 np->idletask.restart = cpu_to_scr(SCRIPTB_BA(np, bad_i_t_l));
5763 np->idletask_ba = vtobus(&np->idletask);
5765 np->notask.start = cpu_to_scr(SCRIPTA_BA(np, idle));
5766 np->notask.restart = cpu_to_scr(SCRIPTB_BA(np, bad_i_t_l));
5767 np->notask_ba = vtobus(&np->notask);
5769 np->bad_itl.start = cpu_to_scr(SCRIPTA_BA(np, idle));
5770 np->bad_itl.restart = cpu_to_scr(SCRIPTB_BA(np, bad_i_t_l));
5771 np->bad_itl_ba = vtobus(&np->bad_itl);
5773 np->bad_itlq.start = cpu_to_scr(SCRIPTA_BA(np, idle));
5774 np->bad_itlq.restart = cpu_to_scr(SCRIPTB_BA(np,bad_i_t_l_q));
5775 np->bad_itlq_ba = vtobus(&np->bad_itlq);
5778 * Allocate and prepare the lun JUMP table that is used
5779 * for a target prior the probing of devices (bad lun table).
5780 * A private table will be allocated for the target on the
5781 * first INQUIRY response received.
5783 np->badluntbl = sym_calloc_dma(256, "BADLUNTBL");
5787 np->badlun_sa = cpu_to_scr(SCRIPTB_BA(np, resel_bad_lun));
5788 for (i = 0 ; i < 64 ; i++) /* 64 luns/target, no less */
5789 np->badluntbl[i] = cpu_to_scr(vtobus(&np->badlun_sa));
5792 * Prepare the bus address array that contains the bus
5793 * address of each target control block.
5794 * For now, assume all logical units are wrong. :)
5796 for (i = 0 ; i < SYM_CONF_MAX_TARGET ; i++) {
5797 np->targtbl[i] = cpu_to_scr(vtobus(&np->target[i]));
5798 np->target[i].head.luntbl_sa =
5799 cpu_to_scr(vtobus(np->badluntbl));
5800 np->target[i].head.lun0_sa =
5801 cpu_to_scr(vtobus(&np->badlun_sa));
5805 * Now check the cache handling of the pci chipset.
5807 if (sym_snooptest (np)) {
5808 printf("%s: CACHE INCORRECTLY CONFIGURED.\n", sym_name(np));
5813 * Sigh! we are done.
5822 * Free everything that has been allocated for this device.
5824 void sym_hcb_free(struct sym_hcb *np)
5833 sym_mfree_dma(np->scriptz0, np->scriptz_sz, "SCRIPTZ0");
5835 sym_mfree_dma(np->scriptb0, np->scriptb_sz, "SCRIPTB0");
5837 sym_mfree_dma(np->scripta0, np->scripta_sz, "SCRIPTA0");
5839 sym_mfree_dma(np->squeue, sizeof(u32)*(MAX_QUEUE*2), "SQUEUE");
5841 sym_mfree_dma(np->dqueue, sizeof(u32)*(MAX_QUEUE*2), "DQUEUE");
5844 while ((qp = sym_remque_head(&np->free_ccbq)) != 0) {
5845 cp = sym_que_entry(qp, struct sym_ccb, link_ccbq);
5846 sym_mfree_dma(cp, sizeof(*cp), "CCB");
5852 sym_mfree_dma(np->badluntbl, 256,"BADLUNTBL");
5854 for (target = 0; target < SYM_CONF_MAX_TARGET ; target++) {
5855 tp = &np->target[target];
5856 for (lun = 0 ; lun < SYM_CONF_MAX_LUN ; lun++) {
5857 lp = sym_lp(tp, lun);
5861 sym_mfree_dma(lp->itlq_tbl, SYM_CONF_MAX_TASK*4,
5864 sym_mfree_dma(lp, sizeof(*lp), "LCB");
5866 #if SYM_CONF_MAX_LUN > 1
5871 sym_mfree_dma(np->targtbl, 256, "TARGTBL");
git://ftp.safe.ca / safe / jmp / linux-2.6 / blob