diff options
| author | James Smart <jsmart2021@gmail.com> | 2022-05-19 05:31:10 -0700 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2022-05-19 20:24:57 -0400 |
| commit | 896325a8b1650e45e7626079170c56313057eefa (patch) | |
| tree | a39fb8179b7d5c6f25136266b468a324828f8f78 /drivers/scsi | |
| parent | 348efeca74878dc6af688486267b862460a96040 (diff) | |
| download | lwn-896325a8b1650e45e7626079170c56313057eefa.tar.gz lwn-896325a8b1650e45e7626079170c56313057eefa.zip | |
scsi: lpfc: Add support for VMID tagging of NVMe I/Os
Modify the NVMe I/O path to look for VMID support and call the transport to
obtain the I/O's appid value.
Link: https://lore.kernel.org/r/20220519123110.17361-5-jsmart2021@gmail.com
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Co-developed-by: Gaurav Srivastava <gaurav.srivastava@broadcom.com>
Signed-off-by: Gaurav Srivastava <gaurav.srivastava@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi')
| -rw-r--r-- | drivers/scsi/lpfc/lpfc_nvme.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/drivers/scsi/lpfc/lpfc_nvme.c b/drivers/scsi/lpfc/lpfc_nvme.c index 5385f4de5523..335e90633933 100644 --- a/drivers/scsi/lpfc/lpfc_nvme.c +++ b/drivers/scsi/lpfc/lpfc_nvme.c @@ -1279,6 +1279,19 @@ lpfc_nvme_prep_io_cmd(struct lpfc_vport *vport, /* Words 13 14 15 are for PBDE support */ + /* add the VMID tags as per switch response */ + if (unlikely(lpfc_ncmd->cur_iocbq.cmd_flag & LPFC_IO_VMID)) { + if (phba->pport->vmid_priority_tagging) { + bf_set(wqe_ccpe, &wqe->fcp_iwrite.wqe_com, 1); + bf_set(wqe_ccp, &wqe->fcp_iwrite.wqe_com, + lpfc_ncmd->cur_iocbq.vmid_tag.cs_ctl_vmid); + } else { + bf_set(wqe_appid, &wqe->fcp_iwrite.wqe_com, 1); + bf_set(wqe_wqes, &wqe->fcp_iwrite.wqe_com, 1); + wqe->words[31] = lpfc_ncmd->cur_iocbq.vmid_tag.app_id; + } + } + pwqeq->vport = vport; return 0; } @@ -1504,6 +1517,11 @@ lpfc_nvme_fcp_io_submit(struct nvme_fc_local_port *pnvme_lport, struct lpfc_nvme_fcpreq_priv *freqpriv; struct nvme_common_command *sqe; uint64_t start = 0; +#if (IS_ENABLED(CONFIG_NVME_FC)) + u8 *uuid = NULL; + int err; + enum dma_data_direction iodir; +#endif /* Validate pointers. LLDD fault handling with transport does * have timing races. @@ -1662,6 +1680,33 @@ lpfc_nvme_fcp_io_submit(struct nvme_fc_local_port *pnvme_lport, lpfc_ncmd->ndlp = ndlp; lpfc_ncmd->qidx = lpfc_queue_info->qidx; +#if (IS_ENABLED(CONFIG_NVME_FC)) + /* 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 I/O generated by a VM, get the associated virtual */ + /* entity id */ + uuid = nvme_fc_io_getuuid(pnvme_fcreq); + + if (uuid) { + if (pnvme_fcreq->io_dir == NVMEFC_FCP_WRITE) + iodir = DMA_TO_DEVICE; + else if (pnvme_fcreq->io_dir == NVMEFC_FCP_READ) + iodir = DMA_FROM_DEVICE; + else + iodir = DMA_NONE; + + err = lpfc_vmid_get_appid(vport, uuid, iodir, + (union lpfc_vmid_io_tag *) + &lpfc_ncmd->cur_iocbq.vmid_tag); + if (!err) + lpfc_ncmd->cur_iocbq.cmd_flag |= LPFC_IO_VMID; + } + } +#endif + /* * Issue the IO on the WQ indicated by index in the hw_queue_handle. * This identfier was create in our hardware queue create callback |