scsi: lpfc: vmid: Timeout implementation for VMID (20397179) · Commits · EulixOS / Software / Kernel

drivers/scsi/lpfc/lpfc_hbadisc.c

+105 −0

Original line number	Diff line number	Diff line
		@@ -72,6 +72,7 @@ static void lpfc_disc_flush_list(struct lpfc_vport *vport);
		static void lpfc_unregister_fcfi_cmpl(struct lpfc_hba , LPFC_MBOXQ_t );
		static int lpfc_fcf_inuse(struct lpfc_hba *);
		static void lpfc_mbx_cmpl_read_sparam(struct lpfc_hba , LPFC_MBOXQ_t );
		static void lpfc_check_inactive_vmid(struct lpfc_hba *phba);

		static int
		lpfc_valid_xpt_node(struct lpfc_nodelist *ndlp)
		@@ -234,6 +235,110 @@ lpfc_dev_loss_tmo_callbk(struct fc_rport *rport)
		return;
		}

		/**
		* lpfc_check_inactive_vmid_one - VMID inactivity checker for a vport
		* @vport: Pointer to vport context object.
		*
		* This function checks for idle VMID entries related to a particular vport. If
		* found unused/idle, free them accordingly.
		**/
		static void lpfc_check_inactive_vmid_one(struct lpfc_vport *vport)
		{
		u16 keep;
		u32 difftime = 0, r, bucket;
		u64 *lta;
		int cpu;
		struct lpfc_vmid *vmp;

		write_lock(&vport->vmid_lock);

		if (!vport->cur_vmid_cnt)
		goto out;

		/* iterate through the table */
		hash_for_each(vport->hash_table, bucket, vmp, hnode) {
		keep = 0;
		if (vmp->flag & LPFC_VMID_REGISTERED) {
		/* check if the particular VMID is in use */
		/* for all available per cpu variable */
		for_each_possible_cpu(cpu) {
		/* if last access time is less than timeout */
		lta = per_cpu_ptr(vmp->last_io_time, cpu);
		if (!lta)
		continue;
		difftime = (jiffies) - (*lta);
		if ((vport->vmid_inactivity_timeout *
		JIFFIES_PER_HR) > difftime) {
		keep = 1;
		break;
		}
		}

		/* if none of the cpus have been used by the vm, */
		/* remove the entry if already registered */
		if (!keep) {
		/* mark the entry for deregistration */
		vmp->flag = LPFC_VMID_DE_REGISTER;
		write_unlock(&vport->vmid_lock);
		if (vport->vmid_priority_tagging)
		r = lpfc_vmid_uvem(vport, vmp, false);
		else
		r = lpfc_vmid_cmd(vport,
		SLI_CTAS_DAPP_IDENT,
		vmp);

		/* decrement number of active vms and mark */
		/* entry in slot as free */
		write_lock(&vport->vmid_lock);
		if (!r) {
		struct lpfc_vmid *ht = vmp;

		vport->cur_vmid_cnt--;
		ht->flag = LPFC_VMID_SLOT_FREE;
		free_percpu(ht->last_io_time);
		ht->last_io_time = NULL;
		hash_del(&ht->hnode);
		}
		}
		}
		}
		out:
		write_unlock(&vport->vmid_lock);
		}

		/**
		* lpfc_check_inactive_vmid - VMID inactivity checker
		* @phba: Pointer to hba context object.
		*
		* This function is called from the worker thread to determine if an entry in
		* the VMID table can be released since there was no I/O activity seen from that
		* particular VM for the specified time. When this happens, the entry in the
		* table is released and also the resources on the switch cleared.
		**/

		static void lpfc_check_inactive_vmid(struct lpfc_hba *phba)
		{
		struct lpfc_vport *vport;
		struct lpfc_vport **vports;
		int i;

		vports = lpfc_create_vport_work_array(phba);
		if (!vports)
		return;

		for (i = 0; i <= phba->max_vports; i++) {
		if ((!vports[i]) && (i == 0))
		vport = phba->pport;
		else
		vport = vports[i];
		if (!vport)
		break;

		lpfc_check_inactive_vmid_one(vport);
		}
		lpfc_destroy_vport_work_array(phba, vports);
		}

		/**
		* lpfc_dev_loss_tmo_handler - Remote node devloss timeout handler
		* @ndlp: Pointer to remote node object.

drivers/scsi/lpfc/lpfc_init.c

+40 −0

Original line number	Diff line number	Diff line
		@@ -4843,6 +4843,42 @@ lpfc_sli4_fcf_redisc_wait_tmo(struct timer_list *t)
		lpfc_worker_wake_up(phba);
		}

		/**
		* lpfc_vmid_poll - VMID timeout detection
		* @ptr: Map to lpfc_hba data structure pointer.
		*
		* This routine is invoked when there is no I/O on by a VM for the specified
		* amount of time. When this situation is detected, the VMID has to be
		* deregistered from the switch and all the local resources freed. The VMID
		* will be reassigned to the VM once the I/O begins.
		**/
		static void
		lpfc_vmid_poll(struct timer_list *t)
		{
		struct lpfc_hba *phba = from_timer(phba, t, inactive_vmid_poll);
		u32 wake_up = 0;

		/* check if there is a need to issue QFPA */
		if (phba->pport->vmid_priority_tagging) {
		wake_up = 1;
		phba->pport->work_port_events \|= WORKER_CHECK_VMID_ISSUE_QFPA;
		}

		/* Is the vmid inactivity timer enabled */
		if (phba->pport->vmid_inactivity_timeout \|\|
		phba->pport->load_flag & FC_DEREGISTER_ALL_APP_ID) {
		wake_up = 1;
		phba->pport->work_port_events \|= WORKER_CHECK_INACTIVE_VMID;
		}

		if (wake_up)
		lpfc_worker_wake_up(phba);

		/* restart the timer for the next iteration */
		mod_timer(&phba->inactive_vmid_poll, jiffies + msecs_to_jiffies(1000 *
		LPFC_VMID_TIMER));
		}

		/**
		* lpfc_sli4_parse_latt_fault - Parse sli4 link-attention link fault code
		* @phba: pointer to lpfc hba data structure.
		@@ -6691,6 +6727,10 @@ lpfc_sli4_driver_resource_setup(struct lpfc_hba *phba)
		phba->hbqs[LPFC_ELS_HBQ].hbq_alloc_buffer = lpfc_sli4_rb_alloc;
		phba->hbqs[LPFC_ELS_HBQ].hbq_free_buffer = lpfc_sli4_rb_free;

		/* for VMID idle timeout if VMID is enabled */
		if (lpfc_is_vmid_enabled(phba))
		timer_setup(&phba->inactive_vmid_poll, lpfc_vmid_poll, 0);

		/*
		* Initialize the SLI Layer to run with lpfc SLI4 HBAs.
		*/