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| /freebsd-9.3-release/sys/dev/isci/scil/ | ||
| H A D | sati_passthrough.c | diff 252651 Wed Jul 03 21:43:35 MDT 2013 jimharris MFC r252262: For ATA_PASSTHROUGH commands, pretend isci(4) supports multiword DMA by treating it as UDMA. This fixes a problem introduced in r249933/r249939, where CAM sends ATA_DSM_TRIM to SATA devices using ATA_PASSTHROUGH_16. scsi_ata_trim() sets protocol as DMA (not UDMA) which is for multi-word DMA, even though no such mode is selected for the device. isci(4) would fail these commands which is the correct behavior but not consistent with other HBAs, namely LSI's. smh@ did some further testing on an LSI controller, which rejected ATA_PASSTHROUGH_16 commands with mode=UDMA_OUT, even though only a UDMA mode was selected on the device. So this precludes adding any kind of mode detection in CAM to determine which mode to use on a per-device basis. Sponsored by: Intel |
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