From 61a7afa2c476a3be261cf88a95b0dea0c3bd29d4 Mon Sep 17 00:00:00 2001 From: James Bottomley Date: Tue, 16 Aug 2005 18:27:34 -0500 Subject: [SCSI] embryonic RAID class The idea behind a RAID class is to provide a uniform interface to all RAID subsystems (both hardware and software) in the kernel. To do that, I've made this class a transport class that's entirely subsystem independent (although the matching routines have to match per subsystem, as you'll see looking at the code). I put it in the scsi subdirectory purely because I needed somewhere to play with it, but it's not a scsi specific module. I used a fusion raid card as the test bed for this; with that kind of card, this is the type of class output you get: jejb@titanic> ls -l /sys/class/raid_devices/20\:0\:0\:0/ total 0 lrwxrwxrwx 1 root root 0 Aug 16 17:21 component-0 -> ../../../devices/pci0000:80/0000:80:04.0/host20/target20:1:0/20:1:0:0/ lrwxrwxrwx 1 root root 0 Aug 16 17:21 component-1 -> ../../../devices/pci0000:80/0000:80:04.0/host20/target20:1:1/20:1:1:0/ lrwxrwxrwx 1 root root 0 Aug 16 17:21 device -> ../../../devices/pci0000:80/0000:80:04.0/host20/target20:0:0/20:0:0:0/ -r--r--r-- 1 root root 16384 Aug 16 17:21 level -r--r--r-- 1 root root 16384 Aug 16 17:21 resync -r--r--r-- 1 root root 16384 Aug 16 17:21 state So it's really simple: for a SCSI device representing a hardware raid, it shows the raid level, the array state, the resync % complete (if the state is resyncing) and the underlying components of the RAID (these are exposed in fusion on the virtual channel 1). As you can see, this type of information can be exported by almost anything, including software raid. The more difficult trick, of course, is going to be getting it to perform configuration type actions with writable attributes. Signed-off-by: James Bottomley --- drivers/scsi/Makefile | 2 ++ 1 file changed, 2 insertions(+) (limited to 'drivers/scsi/Makefile') diff --git a/drivers/scsi/Makefile b/drivers/scsi/Makefile index 3746fb9fa2f..85f9e6bb34b 100644 --- a/drivers/scsi/Makefile +++ b/drivers/scsi/Makefile @@ -22,6 +22,8 @@ subdir-$(CONFIG_PCMCIA) += pcmcia obj-$(CONFIG_SCSI) += scsi_mod.o +obj-$(CONFIG_RAID_ATTRS) += raid_class.o + # --- NOTE ORDERING HERE --- # For kernel non-modular link, transport attributes need to # be initialised before drivers -- cgit From 20f733e7d75a16bffc34842b7682c9247dd5f954 Mon Sep 17 00:00:00 2001 From: Brett Russ Date: Thu, 1 Sep 2005 18:26:17 -0400 Subject: [PATCH] libata: Marvell SATA support (PIO mode) This is my libata compatible low level driver for the Marvell SATA family. Currently it successfully runs in PIO mode on a 6081 chip. EDMA support is in the works and should be done shortly. Review, testing (especially on other flavors of Marvell), comments welcome. Signed-off-by: Brett Russ Signed-off-by: Jeff Garzik --- drivers/scsi/Makefile | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/scsi/Makefile') diff --git a/drivers/scsi/Makefile b/drivers/scsi/Makefile index 3746fb9fa2f..c662b8c8cc6 100644 --- a/drivers/scsi/Makefile +++ b/drivers/scsi/Makefile @@ -132,6 +132,7 @@ obj-$(CONFIG_SCSI_SATA_SIS) += libata.o sata_sis.o obj-$(CONFIG_SCSI_SATA_SX4) += libata.o sata_sx4.o obj-$(CONFIG_SCSI_SATA_NV) += libata.o sata_nv.o obj-$(CONFIG_SCSI_SATA_ULI) += libata.o sata_uli.o +obj-$(CONFIG_SCSI_SATA_MV) += libata.o sata_mv.o obj-$(CONFIG_ARM) += arm/ -- cgit