libata: Add support for SATA attachment to SAS adapters

Brian King linux-ide linux-scsi 1 version Mar 17, 2006 In review

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v1 Latest Mar 17, 200615 patches 12 repliesIn review

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#	Subject and files	Size	Replies
1/15	libata: Setup nbytes in ata_sg_init_one`drivers/scsi/libata-core.c`	+1 -0	2 replies
2/15	libata: Add some dummy noop functions`drivers/scsi/libata-core.c` `include/linux/libata.h`	+4 -0	1 reply
3/15	libata: ata_scsi_slave_config cleanup`drivers/scsi/libata-scsi.c`	+37 ~~-25~~	0 replies
4/15	libata: ata_scsi_queuecmd cleanup`drivers/scsi/libata-scsi.c`	+16 ~~-10~~	3 replies
5/15	libata: Add __ata_scsi_ioctl`drivers/scsi/libata-scsi.c` `include/linux/libata.h`	+24 ~~-13~~	3 replies
6/15	libata: Stop using host->max_cmd_len`drivers/scsi/libata-core.c` `drivers/scsi/libata-scsi.c`	+8 -8	2 replies
7/15	libata: Remove dependence on host_set->dev for SAS`drivers/scsi/libata-core.c` `include/linux/libata.h`	+8 -6	1 reply
8/15	libata: Add host lock to struct ata_port`drivers/scsi/libata-core.c` `drivers/scsi/libata-scsi.c` `include/linux/libata.h`	+28 ~~-27~~	0 replies
9/15	libata: Add support for SATA attachment to SAS adapters`drivers/scsi/libata-core.c` `drivers/scsi/libata-scsi.c` `drivers/scsi/libata.h` +1 more	+165 -2	0 replies
10/15	ipr: Disk remove path cleanup`drivers/scsi/ipr.c` `drivers/scsi/ipr.h`	+4 -3	0 replies
11/15	ipr: Fixup device type check`drivers/scsi/ipr.c` `drivers/scsi/ipr.h`	+18 -2	0 replies
12/15	ipr: Simplify status area dumping`drivers/scsi/ipr.c`	+4 ~~-35~~	0 replies
13/15	ipr: printk macro cleanup/removal`drivers/scsi/ipr.c` `drivers/scsi/ipr.h`	+14 ~~-26~~	0 replies
14/15	ipr: Reset device cleanup`drivers/scsi/ipr.c`	+41 ~~-17~~	0 replies
15/15	ipr: Support attaching SATA devices`drivers/scsi/Kconfig` `drivers/scsi/Makefile` `drivers/scsi/ipr.c` +1 more	+642 ~~-21~~	0 replies

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Cover letter [PATCH 0/15] libata: Add support for SATA attachment to SAS adapters

This is a repost of the patchset I have been carrying. No real feature changes here, mainly just a refresh against Jeff's #upstream libata git tree. I've been running with these patches for a while now without problems.

The following patchset enhances libata to allow SAS device drivers to utilize libata to talk to SATA devices. It introduces some new APIs which allow libata to be used without allocating a virtual scsi host.

New APIs:

ata_sas_port_alloc - Allocate an ata_port
ata_sas_port_init - Initialize an ata_port (probe device, etc) ata_sas_port_destroy - Free an ata_port allocated by ata_sas_port_alloc ata_sas_slave_configure - configure scsi device ata_sas_queuecmd - queue a scsi command, similar to ata_scsi_queuecomand

These new APIs can be used either directly by a SAS LLDD or could be used by the SAS transport class.

Possible usage for a SAS LLDD would be:

scsi_scan_host
target_alloc
ata_sas_port_alloc
slave_alloc
ata_sas_port_init
slave_configure
ata_sas_slave_configure

Commands received by the LLDD for SATA devices would call ata_sas_queuecmd.

Device teardown would occur with:

slave_destroy
port_disable
target_destroy
ata_sas_port_destroy

Signature · 3 lines

Brian King
eServer Storage I/O
IBM Linux Technology Center

Read the cover letter in its thread