on 29/01/2010 22:07 Alexander Motin said the following: > Juergen Lock wrote: >> Ok while we are talking about ahci(4) on IXP700... Can anyone reproduce >> the `test unit ready' bug on one of those? Since I saw no reply to >> my post, >> http://docs.freebsd.org/cgi/mid.cgi?201001231407.o0NE7l8j002620 >> maybe the bug is controller-specific? How to reproduce: just try >> camcontrol tur adaX >> or >> cdrecord -scanbus >> or (at least I think this is the same issue) start xfburn without hal >> running, then watch for the bus to hang at the next disk access. >> (Also leaving the disk led on solid here.) With the previous patch, >> http://people.freebsd.org/~mav/cam-ata.20100119.patch >> (haven't tested the latest one yet) at least it now seems to recover >> after some timeout, leaving this in dmesg: (sorry I didn't notice >> when I first tried, guess I didn't wait long enough...) > > It is controller specific. Intel and NVidia controllers just return > error immediately, as they should, and continue operation. ATI IXP700 - > doesn't: I have this simple patch in my local tree: --- a/sys/cam/ata/ata_xpt.c +++ b/sys/cam/ata/ata_xpt.c _at__at_ -1341,6 +1341,20 _at__at_ ata_action(union ccb *start_ccb) (*(sim->sim_action))(sim, start_ccb); break; } + case XPT_SCSI_IO: + { + struct cam_ed *device; + + device = start_ccb->ccb_h.path->device; + if (device->protocol == PROTO_ATA) { + xpt_print(start_ccb->ccb_h.path, + "XPT_SCSI_IO command for device with PROTO_ATA\n"); + start_ccb->ccb_h.status = CAM_REQ_INVALID; + xpt_done(start_ccb); + return; + } + /* FALLTHROUGH */ + } default: xpt_action_default(start_ccb); break; Here's what it does: $ drecord -scanbus Cdrecord-ProDVD-ProBD-Clone 2.01.01a72 (amd64-unknown-freebsd9.0) Copyright (C) 1995-2010 Jörg Schilling Using libscg version 'schily-0.9'. scsibus0: 0,0,0 0) '' '' '' NON CCS Disk 0,1,0 1) * 0,2,0 2) * 0,3,0 3) * 0,4,0 4) * 0,5,0 5) * 0,6,0 6) * 0,7,0 7) * scsibus1: 1,0,0 100) '' '' '' NON CCS Disk 1,1,0 101) * 1,2,0 102) * 1,3,0 103) * 1,4,0 104) * 1,5,0 105) * 1,6,0 106) * 1,7,0 107) * scsibus5: 5,0,0 500) 'Optiarc ' 'DVD RW AD-7191S ' '1.02' Removable CD-ROM 5,1,0 501) * 5,2,0 502) * 5,3,0 503) * 5,4,0 504) * 5,5,0 505) * 5,6,0 506) * 5,7,0 507) * And in dmesg: kernel: (pass0:ahcich0:0:0:0): XPT_SCSI_IO command for device with PROTO_ATA last message repeated 2 times kernel: (pass1:ahcich1:0:0:0): XPT_SCSI_IO command for device with PROTO_ATA I remember that this patch is not perfect, but it works for my simple desktop setup. No bad side-effects from it either. -- Andriy GaponReceived on Fri Jan 29 2010 - 20:54:00 UTC
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