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boundary="===============5104781222643146603==" Sender: "Linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org --===============5104781222643146603== Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="00000000000040e31605b2070ef5" --00000000000040e31605b2070ef5 From: Gaurav Srivastava This patch implements the timeout functionality for the vmid. After the set time period of inactivity, the vmid is deregistered from the switch. Signed-off-by: Gaurav Srivastava Signed-off-by: James Smart --- v2: Ported the patch on top of 5.10/scsi-queue --- drivers/scsi/lpfc/lpfc_hbadisc.c | 109 +++++++++++++++++++++++++++++++ drivers/scsi/lpfc/lpfc_init.c | 40 ++++++++++++ 2 files changed, 149 insertions(+) diff --git a/drivers/scsi/lpfc/lpfc_hbadisc.c b/drivers/scsi/lpfc/lpfc_hbadisc.c index 142a02114479..b20013866942 100644 --- a/drivers/scsi/lpfc/lpfc_hbadisc.c +++ b/drivers/scsi/lpfc/lpfc_hbadisc.c @@ -190,6 +190,115 @@ 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, it frees them accordingly. + **/ +static void lpfc_check_inactive_vmid_one(struct lpfc_vport *vport) +{ + u16 i, keep; + u32 difftime = 0, r; + u64 *lta; + int cpu; + + write_lock(&vport->vmid_lock); + + if (!vport->cur_vmid_cnt) + goto out; + + /* iterate through the table */ + for (i = 0; i < LPFC_VMID_HASH_SIZE; ++i) { + if (vport->hash_table[i] && (vport->hash_table[i]->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( + vport->hash_table[i]->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 */ + vport->hash_table[i]->flag = + LPFC_VMID_DE_REGISTER; + write_unlock(&vport->vmid_lock); + if (vport->vmid_priority_tagging) + r = lpfc_vmid_uvem(vport, + vport->hash_table[i], + false); + else + r = lpfc_vmid_cmd(vport, + SLI_CTAS_DAPP_IDENT, + vport->hash_table[i]); + + /* decrement number of active vms and mark */ + /* entry in slot as free */ + write_lock(&vport->vmid_lock); + if (!r) { + struct lpfc_vmid *ht = + vport->hash_table[i]; + vport->cur_vmid_cnt--; + ht->flag = LPFC_VMID_SLOT_FREE; + free_percpu(ht->last_io_time); + ht->last_io_time = NULL; + vport->hash_table[i] = NULL; + } + } + } + keep = 0; + } + 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 IO 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. + **/ + +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. diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c index 88777875f4b8..7e93049fba21 100644 --- a/drivers/scsi/lpfc/lpfc_init.c +++ b/drivers/scsi/lpfc/lpfc_init.c @@ -4829,6 +4829,42 @@ 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 IO 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 IO 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. @@ -6679,6 +6715,10 @@ 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. */ -- 2.26.2 --00000000000040e31605b2070ef5 Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature MIIQTQYJKoZIhvcNAQcCoIIQPjCCEDoCAQExDzANBglghkgBZQMEAgEFADALBgkqhkiG9w0BBwGg gg2iMIIE6DCCA9CgAwIBAgIOSBtqCRO9gCTKXSLwFPMwDQYJKoZIhvcNAQELBQAwTDEgMB4GA1UE CxMXR2xvYmFsU2lnbiBSb290IENBIC0gUjMxEzARBgNVBAoTCkdsb2JhbFNpZ24xEzARBgNVBAMT Ckdsb2JhbFNpZ24wHhcNMTYwNjE1MDAwMDAwWhcNMjQwNjE1MDAwMDAwWjBdMQswCQYDVQQGEwJC RTEZMBcGA1UEChMQR2xvYmFsU2lnbiBudi1zYTEzMDEGA1UEAxMqR2xvYmFsU2lnbiBQZXJzb25h 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