From: Muneendra <muneendra.kumar@broadcom.com> To: linux-block@vger.kernel.org, linux-scsi@vger.kernel.org, tj@kernel.org, linux-nvme@lists.infradead.org Cc: jsmart2021@gmail.com, emilne@redhat.com, mkumar@redhat.com, pbonzini@redhat.com, Gaurav Srivastava <gaurav.srivastava@broadcom.com> Subject: [PATCH v4 18/19] lpfc: vmid: Introducing vmid in io path. Date: Mon, 9 Nov 2020 09:54:04 +0530 [thread overview] Message-ID: <1604895845-2587-19-git-send-email-muneendra.kumar@broadcom.com> (raw) In-Reply-To: <1604895845-2587-1-git-send-email-muneendra.kumar@broadcom.com> [-- Attachment #1: Type: text/plain, Size: 6520 bytes --] From: Gaurav Srivastava <gaurav.srivastava@broadcom.com> The patch introduces the vmid in the io path. It checks if the vmid is enabled and if io belongs to a vm or not and acts accordingly. Other supporing APIs are also included in the patch. Signed-off-by: Gaurav Srivastava <gaurav.srivastava@broadcom.com> Signed-off-by: James Smart <jsmart2021@gmail.com> --- v4: No change v3: Replaced blkcg_get_app_identifier with blkcg_get_fc_appid v2: Ported the patch on top of 5.10/scsi-queue Added a fix for issuing QFPA command which was not included in the last submit --- drivers/scsi/lpfc/lpfc_scsi.c | 165 ++++++++++++++++++++++++++++++++++ 1 file changed, 165 insertions(+) diff --git a/drivers/scsi/lpfc/lpfc_scsi.c b/drivers/scsi/lpfc/lpfc_scsi.c index e5a1056cc575..7533438fef07 100644 --- a/drivers/scsi/lpfc/lpfc_scsi.c +++ b/drivers/scsi/lpfc/lpfc_scsi.c @@ -4624,6 +4624,151 @@ void lpfc_vmid_assign_cs_ctl(struct lpfc_vport *vport, struct lpfc_vmid *vmid) } } +/* + * lpfc_vmid_get_appid- get the vmid associated with the uuid + * @vport: The virtual port for which this call is being executed. + * @uuid: uuid associated with the VE + * @cmd: address of scsi cmmd descriptor + * @tag: VMID tag + * Returns status of the function + */ +static int lpfc_vmid_get_appid(struct lpfc_vport *vport, char *uuid, struct + scsi_cmnd * cmd, union lpfc_vmid_io_tag *tag) +{ + struct lpfc_vmid *vmp = NULL; + int hash, len, rc = 1, i; + u8 pending = 0; + + /* check if QFPA is complete */ + if (lpfc_vmid_is_type_priority_tag(vport) && !(vport->vmid_flag & + LPFC_VMID_QFPA_CMPL)) { + vport->work_port_events |= WORKER_CHECK_VMID_ISSUE_QFPA; + return 1; + } + + /* search if the uuid has already been mapped to the vmid */ + len = strlen(uuid); + hash = lpfc_vmid_hash_fn(uuid, len); + + /* search for the VMID in the table */ + read_lock(&vport->vmid_lock); + vmp = lpfc_get_vmid_from_hastable(vport, hash, uuid); + read_unlock(&vport->vmid_lock); + + /* if found, check if its already registered */ + if (vmp && vmp->flag & LPFC_VMID_REGISTERED) { + lpfc_vmid_update_entry(vport, cmd, vmp, tag); + rc = 0; + } else if (vmp && (vmp->flag & LPFC_VMID_REQ_REGISTER || + vmp->flag & LPFC_VMID_DE_REGISTER)) { + /* else if register or dereg request has already been sent */ + /* Hence vmid tag will not be added for this IO */ + rc = 1; + } else { + /* else, start the process to obtain one as per the */ + /* switch connected */ + write_lock(&vport->vmid_lock); + vmp = lpfc_get_vmid_from_hastable(vport, hash, uuid); + + /* while the read lock was released, in case the entry was */ + /* added by other context or is in process of being added */ + if (vmp && vmp->flag & LPFC_VMID_REGISTERED) { + lpfc_vmid_update_entry(vport, cmd, vmp, tag); + write_unlock(&vport->vmid_lock); + return 0; + } else if (vmp && vmp->flag & LPFC_VMID_REQ_REGISTER) { + write_unlock(&vport->vmid_lock); + return 1; + } + + /* else search and allocate a free slot in the hash table */ + if (vport->cur_vmid_cnt < vport->max_vmid) { + for (i = 0; i < vport->max_vmid; ++i) { + vmp = vport->vmid + i; + if (vmp->flag == LPFC_VMID_SLOT_FREE) { + vmp = vport->vmid + i; + break; + } + } + } else { + write_unlock(&vport->vmid_lock); + return 1; + } + + if (vmp && (vmp->flag == LPFC_VMID_SLOT_FREE)) { + vmp->vmid_len = len; + + /* Add the vmid and register */ + memcpy(vmp->host_vmid, uuid, vmp->vmid_len); + vmp->io_rd_cnt = 0; + vmp->io_wr_cnt = 0; + vmp->flag = LPFC_VMID_SLOT_USED; + lpfc_put_vmid_in_hashtable(vport, hash, vmp); + + vmp->delete_inactive = + vport->vmid_inactivity_timeout ? 1 : 0; + + /* if type priority tag, get next available vmid */ + if (lpfc_vmid_is_type_priority_tag(vport)) + lpfc_vmid_assign_cs_ctl(vport, vmp); + + /* allocate the per cpu variable for holding */ + /* the last access time stamp only if vmid is enabled */ + if (!vmp->last_io_time) + vmp->last_io_time = + __alloc_percpu(sizeof(u64), + __alignof__(struct + lpfc_vmid)); + + /* registration pending */ + pending = 1; + rc = 1; + } + write_unlock(&vport->vmid_lock); + + /* complete transaction with switch */ + if (pending) { + if (lpfc_vmid_is_type_priority_tag(vport)) + rc = lpfc_vmid_uvem(vport, vmp, true); + else + rc = lpfc_vmid_cmd(vport, + SLI_CTAS_RAPP_IDENT, + vmp); + if (!rc) { + write_lock(&vport->vmid_lock); + vport->cur_vmid_cnt++; + vmp->flag |= LPFC_VMID_REQ_REGISTER; + write_unlock(&vport->vmid_lock); + } + } + + /* finally, enable the idle timer once */ + if (!(vport->phba->pport->vmid_flag & LPFC_VMID_TIMER_ENBLD)) { + mod_timer(&vport->phba->inactive_vmid_poll, + jiffies + + msecs_to_jiffies(1000 * LPFC_VMID_TIMER)); + vport->phba->pport->vmid_flag |= LPFC_VMID_TIMER_ENBLD; + } + } + return rc; +} + +/* + * lpfc_is_command_vm_io - get the uuid from blk cgroup + * @cmd:Pointer to scsi_cmnd data structure + * Returns uuid if present if not null + */ +static char *lpfc_is_command_vm_io(struct scsi_cmnd *cmd) +{ + char *uuid = NULL; + + if (cmd->request) { + if (cmd->request->bio) + uuid = blkcg_get_fc_appid(cmd->request->bio); + } + return uuid; +} + /** * lpfc_queuecommand - scsi_host_template queuecommand entry point * @cmnd: Pointer to scsi_cmnd data structure. @@ -4649,6 +4794,7 @@ lpfc_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *cmnd) int err, idx; #ifdef CONFIG_SCSI_LPFC_DEBUG_FS uint64_t start = 0L; + u8 *uuid = NULL; if (phba->ktime_on) start = ktime_get_ns(); @@ -4772,6 +4918,25 @@ lpfc_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *cmnd) lpfc_scsi_prep_cmnd(vport, lpfc_cmd, ndlp); + /* check the necessary and sufficient condition to support VMID */ + if (lpfc_is_vmid_enabled(phba) && + (ndlp->vmid_support || + phba->pport->vmid_priority_tagging == + LPFC_VMID_PRIO_TAG_ALL_TARGETS)) { + /* is the IO generated by a VM, get the associated virtual */ + /* entity id */ + uuid = lpfc_is_command_vm_io(cmnd); + + if (uuid) { + err = lpfc_vmid_get_appid(vport, uuid, cmnd, + (union lpfc_vmid_io_tag *) + &lpfc_cmd->cur_iocbq.vmid_tag); + if (!err) + lpfc_cmd->cur_iocbq.iocb_flag |= LPFC_IO_VMID; + } + } + + atomic_inc(&ndlp->cmd_pending); #ifdef CONFIG_SCSI_LPFC_DEBUG_FS if (unlikely(phba->hdwqstat_on & LPFC_CHECK_SCSI_IO)) this_cpu_inc(phba->sli4_hba.c_stat->xmt_io); -- 2.26.2 [-- Attachment #2: S/MIME Cryptographic Signature --] [-- Type: application/pkcs7-signature, Size: 4177 bytes --]
WARNING: multiple messages have this Message-ID (diff)
From: Muneendra <muneendra.kumar@broadcom.com> To: linux-block@vger.kernel.org, linux-scsi@vger.kernel.org, tj@kernel.org, linux-nvme@lists.infradead.org Cc: pbonzini@redhat.com, jsmart2021@gmail.com, mkumar@redhat.com, emilne@redhat.com, Gaurav Srivastava <gaurav.srivastava@broadcom.com> Subject: [PATCH v4 18/19] lpfc: vmid: Introducing vmid in io path. Date: Mon, 9 Nov 2020 09:54:04 +0530 [thread overview] Message-ID: <1604895845-2587-19-git-send-email-muneendra.kumar@broadcom.com> (raw) In-Reply-To: <1604895845-2587-1-git-send-email-muneendra.kumar@broadcom.com> [-- Attachment #1.1: Type: text/plain, Size: 6520 bytes --] From: Gaurav Srivastava <gaurav.srivastava@broadcom.com> The patch introduces the vmid in the io path. It checks if the vmid is enabled and if io belongs to a vm or not and acts accordingly. Other supporing APIs are also included in the patch. Signed-off-by: Gaurav Srivastava <gaurav.srivastava@broadcom.com> Signed-off-by: James Smart <jsmart2021@gmail.com> --- v4: No change v3: Replaced blkcg_get_app_identifier with blkcg_get_fc_appid v2: Ported the patch on top of 5.10/scsi-queue Added a fix for issuing QFPA command which was not included in the last submit --- drivers/scsi/lpfc/lpfc_scsi.c | 165 ++++++++++++++++++++++++++++++++++ 1 file changed, 165 insertions(+) diff --git a/drivers/scsi/lpfc/lpfc_scsi.c b/drivers/scsi/lpfc/lpfc_scsi.c index e5a1056cc575..7533438fef07 100644 --- a/drivers/scsi/lpfc/lpfc_scsi.c +++ b/drivers/scsi/lpfc/lpfc_scsi.c @@ -4624,6 +4624,151 @@ void lpfc_vmid_assign_cs_ctl(struct lpfc_vport *vport, struct lpfc_vmid *vmid) } } +/* + * lpfc_vmid_get_appid- get the vmid associated with the uuid + * @vport: The virtual port for which this call is being executed. + * @uuid: uuid associated with the VE + * @cmd: address of scsi cmmd descriptor + * @tag: VMID tag + * Returns status of the function + */ +static int lpfc_vmid_get_appid(struct lpfc_vport *vport, char *uuid, struct + scsi_cmnd * cmd, union lpfc_vmid_io_tag *tag) +{ + struct lpfc_vmid *vmp = NULL; + int hash, len, rc = 1, i; + u8 pending = 0; + + /* check if QFPA is complete */ + if (lpfc_vmid_is_type_priority_tag(vport) && !(vport->vmid_flag & + LPFC_VMID_QFPA_CMPL)) { + vport->work_port_events |= WORKER_CHECK_VMID_ISSUE_QFPA; + return 1; + } + + /* search if the uuid has already been mapped to the vmid */ + len = strlen(uuid); + hash = lpfc_vmid_hash_fn(uuid, len); + + /* search for the VMID in the table */ + read_lock(&vport->vmid_lock); + vmp = lpfc_get_vmid_from_hastable(vport, hash, uuid); + read_unlock(&vport->vmid_lock); + + /* if found, check if its already registered */ + if (vmp && vmp->flag & LPFC_VMID_REGISTERED) { + lpfc_vmid_update_entry(vport, cmd, vmp, tag); + rc = 0; + } else if (vmp && (vmp->flag & LPFC_VMID_REQ_REGISTER || + vmp->flag & LPFC_VMID_DE_REGISTER)) { + /* else if register or dereg request has already been sent */ + /* Hence vmid tag will not be added for this IO */ + rc = 1; + } else { + /* else, start the process to obtain one as per the */ + /* switch connected */ + write_lock(&vport->vmid_lock); + vmp = lpfc_get_vmid_from_hastable(vport, hash, uuid); + + /* while the read lock was released, in case the entry was */ + /* added by other context or is in process of being added */ + if (vmp && vmp->flag & LPFC_VMID_REGISTERED) { + lpfc_vmid_update_entry(vport, cmd, vmp, tag); + write_unlock(&vport->vmid_lock); + return 0; + } else if (vmp && vmp->flag & LPFC_VMID_REQ_REGISTER) { + write_unlock(&vport->vmid_lock); + return 1; + } + + /* else search and allocate a free slot in the hash table */ + if (vport->cur_vmid_cnt < vport->max_vmid) { + for (i = 0; i < vport->max_vmid; ++i) { + vmp = vport->vmid + i; + if (vmp->flag == LPFC_VMID_SLOT_FREE) { + vmp = vport->vmid + i; + break; + } + } + } else { + write_unlock(&vport->vmid_lock); + return 1; + } + + if (vmp && (vmp->flag == LPFC_VMID_SLOT_FREE)) { + vmp->vmid_len = len; + + /* Add the vmid and register */ + memcpy(vmp->host_vmid, uuid, vmp->vmid_len); + vmp->io_rd_cnt = 0; + vmp->io_wr_cnt = 0; + vmp->flag = LPFC_VMID_SLOT_USED; + lpfc_put_vmid_in_hashtable(vport, hash, vmp); + + vmp->delete_inactive = + vport->vmid_inactivity_timeout ? 1 : 0; + + /* if type priority tag, get next available vmid */ + if (lpfc_vmid_is_type_priority_tag(vport)) + lpfc_vmid_assign_cs_ctl(vport, vmp); + + /* allocate the per cpu variable for holding */ + /* the last access time stamp only if vmid is enabled */ + if (!vmp->last_io_time) + vmp->last_io_time = + __alloc_percpu(sizeof(u64), + __alignof__(struct + lpfc_vmid)); + + /* registration pending */ + pending = 1; + rc = 1; + } + write_unlock(&vport->vmid_lock); + + /* complete transaction with switch */ + if (pending) { + if (lpfc_vmid_is_type_priority_tag(vport)) + rc = lpfc_vmid_uvem(vport, vmp, true); + else + rc = lpfc_vmid_cmd(vport, + SLI_CTAS_RAPP_IDENT, + vmp); + if (!rc) { + write_lock(&vport->vmid_lock); + vport->cur_vmid_cnt++; + vmp->flag |= LPFC_VMID_REQ_REGISTER; + write_unlock(&vport->vmid_lock); + } + } + + /* finally, enable the idle timer once */ + if (!(vport->phba->pport->vmid_flag & LPFC_VMID_TIMER_ENBLD)) { + mod_timer(&vport->phba->inactive_vmid_poll, + jiffies + + msecs_to_jiffies(1000 * LPFC_VMID_TIMER)); + vport->phba->pport->vmid_flag |= LPFC_VMID_TIMER_ENBLD; + } + } + return rc; +} + +/* + * lpfc_is_command_vm_io - get the uuid from blk cgroup + * @cmd:Pointer to scsi_cmnd data structure + * Returns uuid if present if not null + */ +static char *lpfc_is_command_vm_io(struct scsi_cmnd *cmd) +{ + char *uuid = NULL; + + if (cmd->request) { + if (cmd->request->bio) + uuid = blkcg_get_fc_appid(cmd->request->bio); + } + return uuid; +} + /** * lpfc_queuecommand - scsi_host_template queuecommand entry point * @cmnd: Pointer to scsi_cmnd data structure. @@ -4649,6 +4794,7 @@ lpfc_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *cmnd) int err, idx; #ifdef CONFIG_SCSI_LPFC_DEBUG_FS uint64_t start = 0L; + u8 *uuid = NULL; if (phba->ktime_on) start = ktime_get_ns(); @@ -4772,6 +4918,25 @@ lpfc_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *cmnd) lpfc_scsi_prep_cmnd(vport, lpfc_cmd, ndlp); + /* check the necessary and sufficient condition to support VMID */ + if (lpfc_is_vmid_enabled(phba) && + (ndlp->vmid_support || + phba->pport->vmid_priority_tagging == + LPFC_VMID_PRIO_TAG_ALL_TARGETS)) { + /* is the IO generated by a VM, get the associated virtual */ + /* entity id */ + uuid = lpfc_is_command_vm_io(cmnd); + + if (uuid) { + err = lpfc_vmid_get_appid(vport, uuid, cmnd, + (union lpfc_vmid_io_tag *) + &lpfc_cmd->cur_iocbq.vmid_tag); + if (!err) + lpfc_cmd->cur_iocbq.iocb_flag |= LPFC_IO_VMID; + } + } + + atomic_inc(&ndlp->cmd_pending); #ifdef CONFIG_SCSI_LPFC_DEBUG_FS if (unlikely(phba->hdwqstat_on & LPFC_CHECK_SCSI_IO)) this_cpu_inc(phba->sli4_hba.c_stat->xmt_io); -- 2.26.2 [-- Attachment #1.2: S/MIME Cryptographic Signature --] [-- Type: application/pkcs7-signature, Size: 4177 bytes --] [-- Attachment #2: Type: text/plain, Size: 158 bytes --] _______________________________________________ Linux-nvme mailing list Linux-nvme@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-nvme
next prev parent reply other threads:[~2020-11-09 11:18 UTC|newest] Thread overview: 83+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-11-09 4:23 [PATCH v4 00/19] blkcg:Support to track FC storage blk io traffic Muneendra 2020-11-09 4:23 ` Muneendra 2020-11-09 4:23 ` [PATCH v4 01/19] cgroup: Added cgroup_get_from_kernfs_id Muneendra 2020-11-09 4:23 ` Muneendra 2020-11-16 7:25 ` Hannes Reinecke 2020-11-16 7:25 ` Hannes Reinecke 2020-11-09 4:23 ` [PATCH v4 02/19] blkcg: Added a app identifier support for blkcg Muneendra 2020-11-09 4:23 ` Muneendra 2020-11-09 13:55 ` Tejun Heo 2020-11-09 13:55 ` Tejun Heo 2020-11-16 7:31 ` Hannes Reinecke 2020-11-16 7:31 ` Hannes Reinecke 2020-11-18 9:39 ` Muneendra Kumar M 2020-11-18 9:39 ` Muneendra Kumar M 2020-11-09 4:23 ` [PATCH v4 03/19] nvme: Added a newsysfs attribute appid_store Muneendra 2020-11-09 4:23 ` Muneendra 2020-11-16 7:39 ` Hannes Reinecke 2020-11-16 7:39 ` Hannes Reinecke 2020-11-09 4:23 ` [PATCH v4 04/19] lpfc: vmid: Add the datastructure for supporting VMID in lpfc Muneendra 2020-11-09 4:23 ` Muneendra 2020-11-16 7:41 ` Hannes Reinecke 2020-11-16 7:41 ` Hannes Reinecke 2020-11-09 4:23 ` [PATCH v4 05/19] lpfc: vmid: API to check if VMID is enabled Muneendra 2020-11-09 4:23 ` Muneendra 2020-11-16 7:44 ` Hannes Reinecke 2020-11-16 7:44 ` Hannes Reinecke 2020-11-09 4:23 ` [PATCH v4 06/19] lpfc: vmid: Supplementary data structures for vmid Muneendra 2020-11-09 4:23 ` Muneendra 2020-11-16 7:49 ` Hannes Reinecke 2020-11-16 7:49 ` Hannes Reinecke 2020-11-09 4:23 ` [PATCH v4 07/19] lpfc: vmid: Forward declarations for APIs Muneendra 2020-11-09 4:23 ` Muneendra 2020-11-16 7:50 ` Hannes Reinecke 2020-11-16 7:50 ` Hannes Reinecke 2020-11-09 4:23 ` [PATCH v4 08/19] lpfc: vmid: Add support for vmid in mailbox command Muneendra 2020-11-09 4:23 ` Muneendra 2020-11-16 7:52 ` Hannes Reinecke 2020-11-16 7:52 ` Hannes Reinecke 2020-11-09 4:23 ` [PATCH v4 09/19] lpfc: vmid: VMID params initialization Muneendra 2020-11-09 4:23 ` Muneendra 2020-11-16 7:53 ` Hannes Reinecke 2020-11-16 7:53 ` Hannes Reinecke 2020-11-09 4:23 ` [PATCH v4 10/19] lpfc: vmid: vmid resource allocation Muneendra 2020-11-09 4:23 ` Muneendra 2020-11-16 7:56 ` Hannes Reinecke 2020-11-16 7:56 ` Hannes Reinecke 2020-11-09 4:23 ` [PATCH v4 11/19] lpfc: vmid: cleanup vmid resources Muneendra 2020-11-09 4:23 ` Muneendra 2020-11-16 7:56 ` Hannes Reinecke 2020-11-16 7:56 ` Hannes Reinecke 2020-11-09 4:23 ` [PATCH v4 12/19] lpfc: vmid: Implements ELS commands for appid patch Muneendra 2020-11-09 4:23 ` Muneendra 2020-11-09 4:23 ` Muneendra 2020-11-16 8:03 ` Hannes Reinecke 2020-11-16 8:03 ` Hannes Reinecke 2020-11-09 4:23 ` [PATCH v4 13/19] lpfc: vmid: Functions to manage vmids Muneendra 2020-11-09 4:23 ` Muneendra 2020-11-16 8:06 ` Hannes Reinecke 2020-11-16 8:06 ` Hannes Reinecke 2020-11-09 4:24 ` [PATCH v4 14/19] lpfc: vmid: Implements CT commands for appid Muneendra 2020-11-09 4:24 ` Muneendra 2020-11-16 8:08 ` Hannes Reinecke 2020-11-16 8:08 ` Hannes Reinecke 2020-11-09 4:24 ` [PATCH v4 15/19] lpfc: vmid: Appends the vmid in the wqe before sending request Muneendra 2020-11-09 4:24 ` Muneendra 2020-11-16 8:10 ` Hannes Reinecke 2020-11-16 8:10 ` Hannes Reinecke 2020-11-09 4:24 ` [PATCH v4 16/19] lpfc: vmid: Timeout implementation for vmid Muneendra 2020-11-09 4:24 ` Muneendra 2020-11-16 8:11 ` Hannes Reinecke 2020-11-16 8:11 ` Hannes Reinecke 2020-11-09 4:24 ` [PATCH v4 17/19] lpfc: vmid: Adding qfpa and vmid timeout check in worker thread Muneendra 2020-11-09 4:24 ` Muneendra 2020-11-16 8:12 ` Hannes Reinecke 2020-11-16 8:12 ` Hannes Reinecke 2020-11-09 4:24 ` Muneendra [this message] 2020-11-09 4:24 ` [PATCH v4 18/19] lpfc: vmid: Introducing vmid in io path Muneendra 2020-11-16 8:13 ` Hannes Reinecke 2020-11-16 8:13 ` Hannes Reinecke 2020-11-09 4:24 ` [PATCH v4 19/19] scsi: Made changes in Kconfig to select BLK_CGROUP_FC_APPID Muneendra 2020-11-09 4:24 ` Muneendra 2020-11-16 8:15 ` Hannes Reinecke 2020-11-16 8:15 ` Hannes Reinecke
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