[SCSI] scsi_transport_sas: support link error attributes
For now supporting the ->get_linkerrors method is mandatory. I'll probably be beaten to implement the .show_foo variables and different types of attributes soon.. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
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2 changed files with 49 additions and 5 deletions
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@ -34,7 +34,7 @@
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#define SAS_HOST_ATTRS 0
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#define SAS_PORT_ATTRS 11
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#define SAS_PORT_ATTRS 15
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#define SAS_RPORT_ATTRS 5
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struct sas_internal {
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@ -257,6 +257,26 @@ show_sas_phy_##field(struct class_device *cdev, char *buf) \
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sas_phy_show_linkspeed(field) \
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static CLASS_DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL)
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#define sas_phy_show_linkerror(field) \
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static ssize_t \
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show_sas_phy_##field(struct class_device *cdev, char *buf) \
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{ \
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struct sas_phy *phy = transport_class_to_phy(cdev); \
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struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); \
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struct sas_internal *i = to_sas_internal(shost->transportt); \
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int error; \
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\
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error = i->f->get_linkerrors(phy); \
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if (error) \
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return error; \
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return snprintf(buf, 20, "%u\n", phy->field); \
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}
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#define sas_phy_linkerror_attr(field) \
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sas_phy_show_linkerror(field) \
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static CLASS_DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL)
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static ssize_t
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show_sas_device_type(struct class_device *cdev, char *buf)
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{
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@ -282,6 +302,10 @@ sas_phy_linkspeed_attr(minimum_linkrate_hw);
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sas_phy_linkspeed_attr(minimum_linkrate);
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sas_phy_linkspeed_attr(maximum_linkrate_hw);
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sas_phy_linkspeed_attr(maximum_linkrate);
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sas_phy_linkerror_attr(invalid_dword_count);
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sas_phy_linkerror_attr(running_disparity_error_count);
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sas_phy_linkerror_attr(loss_of_dword_sync_count);
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sas_phy_linkerror_attr(phy_reset_problem_count);
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static DECLARE_TRANSPORT_CLASS(sas_phy_class,
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@ -749,6 +773,11 @@ sas_attach_transport(struct sas_function_template *ft)
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SETUP_PORT_ATTRIBUTE(minimum_linkrate);
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SETUP_PORT_ATTRIBUTE(maximum_linkrate_hw);
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SETUP_PORT_ATTRIBUTE(maximum_linkrate);
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SETUP_PORT_ATTRIBUTE(invalid_dword_count);
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SETUP_PORT_ATTRIBUTE(running_disparity_error_count);
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SETUP_PORT_ATTRIBUTE(loss_of_dword_sync_count);
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SETUP_PORT_ATTRIBUTE(phy_reset_problem_count);
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i->phy_attrs[count] = NULL;
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count = 0;
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@ -41,20 +41,28 @@ struct sas_identify {
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u8 phy_identifier;
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};
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/* The functions by which the transport class and the driver communicate */
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struct sas_function_template {
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};
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struct sas_phy {
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struct device dev;
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int number;
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/* phy identification */
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struct sas_identify identify;
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/* phy attributes */
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enum sas_linkrate negotiated_linkrate;
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enum sas_linkrate minimum_linkrate_hw;
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enum sas_linkrate minimum_linkrate;
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enum sas_linkrate maximum_linkrate_hw;
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enum sas_linkrate maximum_linkrate;
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u8 port_identifier;
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/* link error statistics */
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u32 invalid_dword_count;
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u32 running_disparity_error_count;
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u32 loss_of_dword_sync_count;
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u32 phy_reset_problem_count;
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/* the other end of the link */
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struct sas_rphy *rphy;
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};
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@ -79,6 +87,13 @@ struct sas_rphy {
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#define rphy_to_shost(rphy) \
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dev_to_shost((rphy)->dev.parent)
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/* The functions by which the transport class and the driver communicate */
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struct sas_function_template {
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int (*get_linkerrors)(struct sas_phy *);
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};
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extern void sas_remove_host(struct Scsi_Host *);
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extern struct sas_phy *sas_phy_alloc(struct device *, int);
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