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lpfc: add sysfs interface to post NVME RSCN
To support scenarios which aren't bound to nvmetcli add port scenarios, which is currently where the nvmet_fc transport invokes the discovery event callbacks, a syfs attribute is added to lpfc which can be written to cause an RSCN to be generated for the nport. Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com> Signed-off-by: James Smart <jsmart2021@gmail.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Reviewed-by: Arun Easi <aeasi@marvell.com> Signed-off-by: Sagi Grimberg <sagi@grimberg.me> Signed-off-by: Christoph Hellwig <hch@lst.de>
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@ -820,6 +820,7 @@ struct lpfc_hba {
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uint32_t cfg_use_msi;
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uint32_t cfg_auto_imax;
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uint32_t cfg_fcp_imax;
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uint32_t cfg_force_rscn;
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uint32_t cfg_cq_poll_threshold;
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uint32_t cfg_cq_max_proc_limit;
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uint32_t cfg_fcp_cpu_map;
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@ -4958,6 +4958,64 @@ static DEVICE_ATTR(lpfc_req_fw_upgrade, S_IRUGO | S_IWUSR,
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lpfc_request_firmware_upgrade_show,
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lpfc_request_firmware_upgrade_store);
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/**
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* lpfc_force_rscn_store
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*
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* @dev: class device that is converted into a Scsi_host.
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* @attr: device attribute, not used.
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* @buf: unused string
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* @count: unused variable.
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*
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* Description:
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* Force the switch to send a RSCN to all other NPorts in our zone
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* If we are direct connect pt2pt, build the RSCN command ourself
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* and send to the other NPort. Not supported for private loop.
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*
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* Returns:
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* 0 - on success
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* -EIO - if command is not sent
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**/
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static ssize_t
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lpfc_force_rscn_store(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct Scsi_Host *shost = class_to_shost(dev);
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struct lpfc_vport *vport = (struct lpfc_vport *)shost->hostdata;
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int i;
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i = lpfc_issue_els_rscn(vport, 0);
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if (i)
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return -EIO;
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return strlen(buf);
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}
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/*
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* lpfc_force_rscn: Force an RSCN to be sent to all remote NPorts
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* connected to the HBA.
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*
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* Value range is any ascii value
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*/
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static int lpfc_force_rscn;
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module_param(lpfc_force_rscn, int, 0644);
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MODULE_PARM_DESC(lpfc_force_rscn,
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"Force an RSCN to be sent to all remote NPorts");
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lpfc_param_show(force_rscn)
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/**
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* lpfc_force_rscn_init - Force an RSCN to be sent to all remote NPorts
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* @phba: lpfc_hba pointer.
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* @val: unused value.
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*
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* Returns:
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* zero if val saved.
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**/
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static int
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lpfc_force_rscn_init(struct lpfc_hba *phba, int val)
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{
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return 0;
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}
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static DEVICE_ATTR_RW(lpfc_force_rscn);
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/**
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* lpfc_fcp_imax_store
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*
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@ -5958,6 +6016,7 @@ struct device_attribute *lpfc_hba_attrs[] = {
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&dev_attr_lpfc_nvme_oas,
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&dev_attr_lpfc_nvme_embed_cmd,
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&dev_attr_lpfc_fcp_imax,
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&dev_attr_lpfc_force_rscn,
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&dev_attr_lpfc_cq_poll_threshold,
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&dev_attr_lpfc_cq_max_proc_limit,
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&dev_attr_lpfc_fcp_cpu_map,
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@ -7005,6 +7064,7 @@ lpfc_get_cfgparam(struct lpfc_hba *phba)
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lpfc_nvme_oas_init(phba, lpfc_nvme_oas);
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lpfc_nvme_embed_cmd_init(phba, lpfc_nvme_embed_cmd);
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lpfc_fcp_imax_init(phba, lpfc_fcp_imax);
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lpfc_force_rscn_init(phba, lpfc_force_rscn);
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lpfc_cq_poll_threshold_init(phba, lpfc_cq_poll_threshold);
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lpfc_cq_max_proc_limit_init(phba, lpfc_cq_max_proc_limit);
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lpfc_fcp_cpu_map_init(phba, lpfc_fcp_cpu_map);
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