/* * Device driver for the SYMBIOS/LSILOGIC 53C8XX and 53C1010 family * of PCI-SCSI IO processors. * * Copyright (C) 1999-2001 Gerard Roudier * * This driver is derived from the Linux sym53c8xx driver. * Copyright (C) 1998-2000 Gerard Roudier * * The sym53c8xx driver is derived from the ncr53c8xx driver that had been * a port of the FreeBSD ncr driver to Linux-1.2.13. * * The original ncr driver has been written for 386bsd and FreeBSD by * Wolfgang Stanglmeier * Stefan Esser * Copyright (C) 1994 Wolfgang Stanglmeier * * Other major contributions: * * NVRAM detection and reading. * Copyright (C) 1997 Richard Waltham * *----------------------------------------------------------------------------- * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * Where this Software is combined with software released under the terms of * the GNU Public License ("GPL") and the terms of the GPL would require the * combined work to also be released under the terms of the GPL, the terms * and conditions of this License will apply in addition to those of the * GPL with the exception of any terms or conditions of this License that * conflict with, or are expressly prohibited by, the GPL. * * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #ifdef __FreeBSD__ #include #else #include "sym_glue.h" #endif #ifdef SYM_OPT_HANDLE_IO_TIMEOUT /* * Optional CCB timeout handling. * * This code is useful for O/Ses that allow or expect * SIMs (low-level drivers) to handle SCSI IO timeouts. * It uses a power-of-two based algorithm of my own:) * that avoids scanning of lists, provided that: * * - The IO does complete in less than half the associated * timeout value. * - The greatest delay between the queuing of the IO and * its completion is less than * (1<<(SYM_CONF_TIMEOUT_ORDER_MAX-1))/2 ticks. * * For example, if tick is 1 second and the max order is 8, * any IO that is completed within less than 64 seconds will * just be put into some list at queuing and be removed * at completion without any additionnal overhead. */ /* * Set a timeout condition on a CCB. */ void sym_timeout_ccb(hcb_p np, ccb_p cp, u_int ticks) { sym_remque(&cp->tmo_linkq); cp->tmo_clock = np->tmo_clock + ticks; if (!ticks) { sym_insque_head(&cp->tmo_linkq, &np->tmo0_ccbq); } else { int i = SYM_CONF_TIMEOUT_ORDER_MAX - 1; while (i > 0) { if (ticks >= (1<<(i+1))) break; --i; } if (!(np->tmo_actq & (1<tmo_linkq, &np->tmo_ccbq[i]); } } /* * Walk a list of CCB and handle timeout conditions. * Should never be called in normal situations. */ static void sym_walk_ccb_tmo_list(hcb_p np, SYM_QUEHEAD *tmoq) { SYM_QUEHEAD qtmp, *qp; ccb_p cp; sym_que_move(tmoq, &qtmp); while ((qp = sym_remque_head(&qtmp)) != 0) { sym_insque_head(qp, &np->tmo0_ccbq); cp = sym_que_entry(qp, struct sym_ccb, tmo_linkq); if (cp->tmo_clock != np->tmo_clock && cp->tmo_clock + 1 != np->tmo_clock) sym_timeout_ccb(np, cp, cp->tmo_clock - np->tmo_clock); else sym_abort_ccb(np, cp, 1); } } /* * Our clock handler called from the O/S specific side. */ void sym_clock(hcb_p np) { int i, j; u_int tmp; tmp = np->tmo_clock; tmp ^= (++np->tmo_clock); for (i = 0; i < SYM_CONF_TIMEOUT_ORDER_MAX; i++, tmp >>= 1) { if (!(tmp & 1)) continue; j = i; if (np->tmo_actq & (1<tmo_ccbq[j])) { sym_walk_ccb_tmo_list(np, &np->tmo_ccbq[j]); } np->tmo_actq ^= (1<target[target]; #define __tprev tp->tinfo.prev #define __tcurr tp->tinfo.curr if (__tprev.options == __tcurr.options && __tprev.width == __tcurr.width && __tprev.offset == __tcurr.offset && !(__tprev.offset && __tprev.period != __tcurr.period)) return; __tprev.options = __tcurr.options; __tprev.width = __tcurr.width; __tprev.offset = __tcurr.offset; __tprev.period = __tcurr.period; if (__tcurr.offset && __tcurr.period) { u_int period, f10, mb10; char *scsi; period = f10 = mb10 = 0; scsi = "FAST-5"; if (__tcurr.period <= 9) { scsi = "FAST-80"; period = 125; mb10 = 1600; } else { if (__tcurr.period <= 11) { scsi = "FAST-40"; period = 250; if (__tcurr.period == 11) period = 303; } else if (__tcurr.period < 25) { scsi = "FAST-20"; if (__tcurr.period == 12) period = 500; } else if (__tcurr.period <= 50) { scsi = "FAST-10"; } if (!period) period = 40 * __tcurr.period; f10 = 100000 << (__tcurr.width ? 1 : 0); mb10 = (f10 + period/2) / period; } printf_info ( "%s:%d: %s %sSCSI %d.%d MB/s %s (%d.%d ns, offset %d)\n", sym_name(np), target, scsi, __tcurr.width? "WIDE " : "", mb10/10, mb10%10, (__tcurr.options & PPR_OPT_DT) ? "DT" : "ST", period/10, period%10, __tcurr.offset); } else printf_info ("%s:%d: %sasynchronous.\n", sym_name(np), target, __tcurr.width? "wide " : ""); } #undef __tprev #undef __tcurr #endif /* SYM_OPT_ANNOUNCE_TRANSFER_RATE */