SAS on NetBSD-11 broken

Hi,

I've been running a Symbios Logic SAS1068 PCI card in my AlphaServer DS25 
for ages:

[     1.000000] pci3: i/o space, memory space enabled, rd/line, rd/mult, wr/inv ok
[     1.000000] mpt0 at pci3 dev 1 function 0: Symbios Logic SAS1068 (rev. 0x01)
[     1.000000] mpt0: interrupting at dec 6600 irq 36
[     1.000000] scsibus2 at mpt0: 112 targets, 8 luns per target

I just tried a NetBSD 11 kernel from 21-September, and now instead of 
this:

[     3.540562] scsibus0: waiting 2 seconds for devices to settle...
[     3.611134] scsibus1: waiting 2 seconds for devices to settle...
[     3.682898] scsibus2: waiting 2 seconds for devices to settle...
[     5.762201] sd0 at scsibus0 target 0 lun 0: <COMPAQ, BD0726536C, 3B02> disk fixed
[     5.853996] sd0: 69464 MB, 28004 cyl, 20 head, 254 sec, 512 bytes/sect x 142264000 sectors
[     5.973135] sd0: sync (25.00ns offset 63), 16-bit (80.000MB/s) transfers, tagged queueing
[    20.946493] sd1 at scsibus2 target 1 lun 0: <ATA, ST2000LM010-1RA1, SDM1> disk fixed
[    21.042194] sd1: 1863 GB, 1907730 cyl, 16 head, 127 sec, 512 bytes/sect x 3907029168 sectors
[    21.506054] sd1: tagged queueing

I get this:

[     3.425563] scsibus0: waiting 2 seconds for devices to settle...
[     3.495526] scsibus1: waiting 2 seconds for devices to settle...
[     3.567291] scsibus2: waiting 2 seconds for devices to settle...
[     5.646219] sd0 at scsibus0 target 0 lun 0: <COMPAQ, BD0726536C, 3B02> disk fixed
[     5.738014] sd0: 69464 MB, 28004 cyl, 20 head, 254 sec, 512 bytes/sect x 142264000 sectors
[     5.858130] sd0: sync (25.00ns offset 63), 16-bit (80.000MB/s) transfers, tagged queueing
[    20.832434] sd1 at scsibus2 target 1 lun 0: <ATA, ST2000LM010-1RA1, SDM1> disk fixed
[    20.924228] sd1(mpt0:0:1:0):  Check Condition on CDB: 0x23 00 00 00 00 00 00 00 0c 00
[    21.016989]     SENSE KEY:  Illegal Request
[    21.064832]      ASC/ASCQ:  Invalid Command Operation Code
[    21.132435] sd1: drive offline
[    21.170316] sd1: tagged queueing

(same for sd2, sd3 and sd4, which are all on mpt0)

This seems to have happened on sparc64, too:

https://dmesgd.nycbug.org/dmesgd?do=view&id=8531

This shows that the Symbios Logic 53c1020/53c1030 is fine, but the Symbios 
Logic SAS1064 is not. Mine is the SAS1068.

Does anyone know where things went wrong?

John