From acbf167d4ad8c27f9743a4b539d51ae9535bf21c Mon Sep 17 00:00:00 2001 From: "Darrick J. Wong" Date: Thu, 11 Jan 2007 14:14:57 -0800 Subject: [SCSI] libsas: Add a sysfs knob to enable/disable a phy This patch lets a user arbitrarily enable or disable a phy via sysfs. Potential applications include shutting down a phy to replace one lane of wide port, and (more importantly) providing a method for the libata SATL to control the phy. Signed-off-by: Darrick J. Wong Signed-off-by: James Bottomley --- include/scsi/libsas.h | 3 +++ include/scsi/scsi_transport_sas.h | 2 ++ 2 files changed, 5 insertions(+) (limited to 'include') diff --git a/include/scsi/libsas.h b/include/scsi/libsas.h index da96bcfb9e46..0689d6682aa3 100644 --- a/include/scsi/libsas.h +++ b/include/scsi/libsas.h @@ -614,6 +614,9 @@ struct sas_domain_function_template { extern int sas_register_ha(struct sas_ha_struct *); extern int sas_unregister_ha(struct sas_ha_struct *); +int sas_set_phy_speed(struct sas_phy *phy, + struct sas_phy_linkrates *rates); +int sas_phy_enable(struct sas_phy *phy, int enabled); int sas_phy_reset(struct sas_phy *phy, int hard_reset); extern int sas_queuecommand(struct scsi_cmnd *, void (*scsi_done)(struct scsi_cmnd *)); diff --git a/include/scsi/scsi_transport_sas.h b/include/scsi/scsi_transport_sas.h index 59633a82de47..45d58598c3ee 100644 --- a/include/scsi/scsi_transport_sas.h +++ b/include/scsi/scsi_transport_sas.h @@ -54,6 +54,7 @@ struct sas_identify { struct sas_phy { struct device dev; int number; + int enabled; /* phy identification */ struct sas_identify identify; @@ -163,6 +164,7 @@ struct sas_function_template { int (*get_enclosure_identifier)(struct sas_rphy *, u64 *); int (*get_bay_identifier)(struct sas_rphy *); int (*phy_reset)(struct sas_phy *, int); + int (*phy_enable)(struct sas_phy *, int); int (*set_phy_speed)(struct sas_phy *, struct sas_phy_linkrates *); }; -- cgit v1.2.2