Date: Mon, 3 Apr 2000 04:11:13 -0700 (PDT) From: Nick Hibma <n_hibma@FreeBSD.org> To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/cam cam_periph.h cam_xpt.c src/sys/dev/usb umass.c Message-ID: <200004031111.EAA05374@freefall.freebsd.org>
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n_hibma 2000/04/03 04:11:13 PDT
Modified files:
sys/cam cam_periph.h cam_xpt.c
sys/dev/usb umass.c
Log:
Add a hack to cam that makes the cam_xpt available to the rest of the
kernel. Justin agress that there is no other reasonable alternative to
do automatic rescans on connect.
The problem is that when a new device attaches to a SIM (SCSI host
controller) we need to send a XPT_SCAN_BUS command to the SIM using
xpt_action. This requires however that there is a peripheral available
to take the command (otherwise xpt_done and later bomb). The RESCAN
ioctl uses the same periph.
This enables a USB mass storage drive to do an automatic rescan on
connection of the drive.
The automatic dropping of a CAM entry on disconnection was already
working (asynchronous event).
The next thing to do is find someone to commit a change to vpo to do the
same thing. Just port umass_cam_rescan and friends across to that
driver.
Approved by: gibbs
Revision Changes Path
1.8 +3 -1 src/sys/cam/cam_periph.h
1.82 +1 -3 src/sys/cam/cam_xpt.c
1.18 +4 -27 src/sys/dev/usb/umass.c
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