Commit 41b194b8 authored by James Smart's avatar James Smart Committed by Christoph Hellwig
Browse files

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: default avatarDick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: default avatarJames Smart <jsmart2021@gmail.com>
Reviewed-by: default avatarHannes Reinecke <hare@suse.com>
Reviewed-by: default avatarArun Easi <aeasi@marvell.com>
Signed-off-by: default avatarSagi Grimberg <sagi@grimberg.me>
Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
parent 6f2589f4

drivers/scsi/lpfc/lpfc.h

+1 −0
Original line number Diff line number Diff line
@@ -820,6 +820,7 @@ struct lpfc_hba { 
	uint32_t cfg_use_msi;

	uint32_t cfg_auto_imax;

	uint32_t cfg_fcp_imax;

	uint32_t cfg_force_rscn;

	uint32_t cfg_cq_poll_threshold;

	uint32_t cfg_cq_max_proc_limit;

	uint32_t cfg_fcp_cpu_map;

drivers/scsi/lpfc/lpfc_attr.c

+60 −0
Original line number Diff line number Diff line
@@ -4958,6 +4958,64 @@ static DEVICE_ATTR(lpfc_req_fw_upgrade, S_IRUGO | S_IWUSR, 
		   lpfc_request_firmware_upgrade_show,

		   lpfc_request_firmware_upgrade_store);



/**

 * lpfc_force_rscn_store

 *

 * @dev: class device that is converted into a Scsi_host.

 * @attr: device attribute, not used.

 * @buf: unused string

 * @count: unused variable.

 *

 * Description:

 * Force the switch to send a RSCN to all other NPorts in our zone

 * If we are direct connect pt2pt, build the RSCN command ourself

 * and send to the other NPort. Not supported for private loop.

 *

 * Returns:

 * 0      - on success

 * -EIO   - if command is not sent

 **/

static ssize_t

lpfc_force_rscn_store(struct device *dev, struct device_attribute *attr,

		      const char *buf, size_t count)

{

	struct Scsi_Host *shost = class_to_shost(dev);

	struct lpfc_vport *vport = (struct lpfc_vport *)shost->hostdata;

	int i;



	i = lpfc_issue_els_rscn(vport, 0);

	if (i)

		return -EIO;

	return strlen(buf);

}



/*

 * lpfc_force_rscn: Force an RSCN to be sent to all remote NPorts

 * connected to  the HBA.

 *

 * Value range is any ascii value

 */

static int lpfc_force_rscn;

module_param(lpfc_force_rscn, int, 0644);

MODULE_PARM_DESC(lpfc_force_rscn,

		 "Force an RSCN to be sent to all remote NPorts");

lpfc_param_show(force_rscn)



/**

 * lpfc_force_rscn_init - Force an RSCN to be sent to all remote NPorts

 * @phba: lpfc_hba pointer.

 * @val: unused value.

 *

 * Returns:

 * zero if val saved.

 **/

static int

lpfc_force_rscn_init(struct lpfc_hba *phba, int val)

{

	return 0;

}

static DEVICE_ATTR_RW(lpfc_force_rscn);



/**

 * lpfc_fcp_imax_store

 *
@@ -5958,6 +6016,7 @@ struct device_attribute *lpfc_hba_attrs[] = { 
	&dev_attr_lpfc_nvme_oas,

	&dev_attr_lpfc_nvme_embed_cmd,

	&dev_attr_lpfc_fcp_imax,

	&dev_attr_lpfc_force_rscn,

	&dev_attr_lpfc_cq_poll_threshold,

	&dev_attr_lpfc_cq_max_proc_limit,

	&dev_attr_lpfc_fcp_cpu_map,
@@ -7005,6 +7064,7 @@ lpfc_get_cfgparam(struct lpfc_hba *phba) 
	lpfc_nvme_oas_init(phba, lpfc_nvme_oas);

	lpfc_nvme_embed_cmd_init(phba, lpfc_nvme_embed_cmd);

	lpfc_fcp_imax_init(phba, lpfc_fcp_imax);

	lpfc_force_rscn_init(phba, lpfc_force_rscn);

	lpfc_cq_poll_threshold_init(phba, lpfc_cq_poll_threshold);

	lpfc_cq_max_proc_limit_init(phba, lpfc_cq_max_proc_limit);

	lpfc_fcp_cpu_map_init(phba, lpfc_fcp_cpu_map);

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