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| author | Christoph Hellwig <hch@lst.de> | 2005-10-19 20:01:31 +0200 |
|---|---|---|
| committer | James Bottomley <jejb@mulgrave.(none)> | 2005-10-28 19:08:03 -0500 |
| commit | 07ba3a954714da10cbd3f6249d93ac2c1df72c4f (patch) | |
| tree | dae82d40a97df0e1d7f377d9738866a453d699b2 | |
| parent | ac01bbbd3b7ebfca64357aed12cf476b16abe3ce (diff) | |
| download | kernel_samsung_espresso10-07ba3a954714da10cbd3f6249d93ac2c1df72c4f.zip kernel_samsung_espresso10-07ba3a954714da10cbd3f6249d93ac2c1df72c4f.tar.gz kernel_samsung_espresso10-07ba3a954714da10cbd3f6249d93ac2c1df72c4f.tar.bz2 | |
[SCSI] sas: add support for PHY resets
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
| -rw-r--r-- | drivers/scsi/scsi_transport_sas.c | 43 | ||||
| -rw-r--r-- | include/scsi/scsi_transport_sas.h | 1 |
2 files changed, 42 insertions, 2 deletions
diff --git a/drivers/scsi/scsi_transport_sas.c b/drivers/scsi/scsi_transport_sas.c index f5618c1..0cc766a 100644 --- a/drivers/scsi/scsi_transport_sas.c +++ b/drivers/scsi/scsi_transport_sas.c @@ -34,7 +34,7 @@ #define SAS_HOST_ATTRS 0 -#define SAS_PORT_ATTRS 15 +#define SAS_PORT_ATTRS 17 #define SAS_RPORT_ATTRS 5 struct sas_internal { @@ -289,9 +289,39 @@ show_sas_device_type(struct class_device *cdev, char *buf) return snprintf(buf, 20, "none\n"); return get_sas_device_type_names(phy->identify.device_type, buf); } - static CLASS_DEVICE_ATTR(device_type, S_IRUGO, show_sas_device_type, NULL); +static ssize_t do_sas_phy_reset(struct class_device *cdev, + size_t count, int hard_reset) +{ + struct sas_phy *phy = transport_class_to_phy(cdev); + struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); + struct sas_internal *i = to_sas_internal(shost->transportt); + int error; + + if (!phy->local_attached) + return -EINVAL; + + error = i->f->phy_reset(phy, hard_reset); + if (error) + return error; + return count; +}; + +static ssize_t store_sas_link_reset(struct class_device *cdev, + const char *buf, size_t count) +{ + return do_sas_phy_reset(cdev, count, 0); +} +static CLASS_DEVICE_ATTR(link_reset, S_IWUSR, NULL, store_sas_link_reset); + +static ssize_t store_sas_hard_reset(struct class_device *cdev, + const char *buf, size_t count) +{ + return do_sas_phy_reset(cdev, count, 1); +} +static CLASS_DEVICE_ATTR(hard_reset, S_IWUSR, NULL, store_sas_hard_reset); + sas_phy_protocol_attr(identify.initiator_port_protocols, initiator_port_protocols); sas_phy_protocol_attr(identify.target_port_protocols, @@ -725,6 +755,13 @@ static struct device *sas_target_parent(struct Scsi_Host *shost, i->phy_attrs[count] = &i->private_phy_attrs[count]; \ count++ +#define SETUP_PORT_ATTRIBUTE_WRONLY(field) \ + i->private_phy_attrs[count] = class_device_attr_##field; \ + i->private_phy_attrs[count].attr.mode = S_IWUGO; \ + i->private_phy_attrs[count].show = NULL; \ + i->phy_attrs[count] = &i->private_phy_attrs[count]; \ + count++ + /** * sas_attach_transport -- instantiate SAS transport template @@ -781,6 +818,8 @@ sas_attach_transport(struct sas_function_template *ft) SETUP_PORT_ATTRIBUTE(running_disparity_error_count); SETUP_PORT_ATTRIBUTE(loss_of_dword_sync_count); SETUP_PORT_ATTRIBUTE(phy_reset_problem_count); + SETUP_PORT_ATTRIBUTE_WRONLY(link_reset); + SETUP_PORT_ATTRIBUTE_WRONLY(hard_reset); i->phy_attrs[count] = NULL; count = 0; diff --git a/include/scsi/scsi_transport_sas.h b/include/scsi/scsi_transport_sas.h index 57eb68c..b91400b 100644 --- a/include/scsi/scsi_transport_sas.h +++ b/include/scsi/scsi_transport_sas.h @@ -94,6 +94,7 @@ struct sas_rphy { /* The functions by which the transport class and the driver communicate */ struct sas_function_template { int (*get_linkerrors)(struct sas_phy *); + int (*phy_reset)(struct sas_phy *, int); }; |