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| author | mav <mav@FreeBSD.org> | 2009-12-06 00:10:13 +0000 |
|---|---|---|
| committer | mav <mav@FreeBSD.org> | 2009-12-06 00:10:13 +0000 |
| commit | 6a3018e7cff16ab166672e276b4b39154ad09739 (patch) | |
| tree | 8def18d183a8f2ec2847c5ef06fe2fac081d798e /sys/conf | |
| parent | 9bb92ae41af45cc801f28a880e08648aad72e241 (diff) | |
| download | FreeBSD-src-6a3018e7cff16ab166672e276b4b39154ad09739.zip FreeBSD-src-6a3018e7cff16ab166672e276b4b39154ad09739.tar.gz | |
MFp4:
Introduce ATA_CAM kernel option, turning ata(4) controller drivers into
cam(4) interface modules. When enabled, this options deprecates all ata(4)
peripheral drivers (ad, acd, ...) and interfaces and allows cam(4) drivers
(ada, cd, ...) and interfaces to be natively used instead.
As side effect of this, ata(4) mode setting code was completely rewritten
to make controller API more strict and permit above change. While doing
this, SATA revision was separated from PATA mode. It allows DMA-incapable
SATA devices to operate and makes hw.ata.atapi_dma tunable work again.
Also allow ata(4) controller drivers (except some specific or broken ones)
to handle larger data transfers. Previous constraint of 64K was artificial
and is not really required by PCI ATA BM specification or hardware.
Submitted by: nwitehorn (powerpc part)
Diffstat (limited to 'sys/conf')
| -rw-r--r-- | sys/conf/NOTES | 6 | ||||
| -rw-r--r-- | sys/conf/options | 1 |
2 files changed, 7 insertions, 0 deletions
diff --git a/sys/conf/NOTES b/sys/conf/NOTES index 91091b0..54126fc 100644 --- a/sys/conf/NOTES +++ b/sys/conf/NOTES @@ -1718,9 +1718,15 @@ hint.ata.1.irq="15" # else the device numbers are dynamically allocated. # ATA_REQUEST_TIMEOUT: the number of seconds to wait for an ATA request # before timing out. +# ATA_CAM: Turn ata(4) subsystem controller drivers into cam(4) +# interface modules. This deprecates all ata(4) +# peripheral device drivers (atadisk, ataraid, atapicd, +# atapifd. atapist, atapicam) and all user-level APIs. +# cam(4) drivers and APIs will be connected instead. options ATA_STATIC_ID #options ATA_REQUEST_TIMEOUT=10 +#options ATA_CAM # # Standard floppy disk controllers and floppy tapes, supports diff --git a/sys/conf/options b/sys/conf/options index 756d75d..75f69c2 100644 --- a/sys/conf/options +++ b/sys/conf/options @@ -351,6 +351,7 @@ ISCSI_INITIATOR_DEBUG opt_iscsi_initiator.h ATA_STATIC_ID opt_ata.h ATA_NOPCI opt_ata.h ATA_REQUEST_TIMEOUT opt_ata.h +ATA_CAM opt_ata.h # Net stuff. ACCEPT_FILTER_DATA |
