On Wed, Dec 25, 2013 at 02:54:19AM +0100, Emmanuel Dreyfus wrote: > I gave it a try, and here is the result on i386: > /netbsd: mpii0: error 27 loading dmamap
I poked some debug inside bus_dmamap_load, and came to the conclusion that the error could be worked around by just increasing MPII_MAX_SGL (see patch below) The new value is a wild guess, as I do not really know what I am doing here (explanations welcome), but now it passes the first read command: LTFS20060D Backend ReadPosition: Partition=0, LogObject=2, FMcount=1 LTFS20039D Backend read: 524288 bytes LTFS20010D SCSI request: [ 08 02 08 00 00 00 ] Requested length=524288 LTFS20089D Driver detail: status = 0x0 LTFS20089D Driver detail: errno = 0x0 LTFS20089D Driver detail: retsts = 0x0 LTFS20089D Driver detail: status = 0x0 LTFS20089D Driver detail: error = 0x0 LTFS20089D Driver detail: senselen_used = 0x0 LTFS20011D SCSI outcome: Driver status=0x00 SCSI status=0x00 Actual length=494 The dirty patch: Index: sys/dev/pci/mpii.c =================================================================== RCS file: /cvsroot/src/sys/dev/pci/mpii.c,v retrieving revision 1.1 diff -U1 -r1.1 mpii.c --- sys/dev/pci/mpii.c 19 Apr 2012 17:50:51 -0000 1.1 +++ sys/dev/pci/mpii.c 27 Dec 2013 09:46:58 -0000 @@ -1755,3 +1755,3 @@ */ -#define MPII_MAX_SGL (32) +#define MPII_MAX_SGL (512) /* was 32 */ -- Emmanuel Dreyfus m...@netbsd.org
