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git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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scsi: lpfc: Commonize VMID code location
Remove VMID code from its SCSI-specific location and move to a new file solely for VMID code. Link: https://lore.kernel.org/r/20220519123110.17361-3-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>
This commit is contained in:
James Smart
Martin K. Petersen
parent
827fc630e4
commit
ed913cf4a5
4 changed files with 291 additions and 257 deletions
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@ -33,4 +33,4 @@ obj-$(CONFIG_SCSI_LPFC) := lpfc.o
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lpfc-objs := lpfc_mem.o lpfc_sli.o lpfc_ct.o lpfc_els.o \
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lpfc-objs := lpfc_mem.o lpfc_sli.o lpfc_ct.o lpfc_els.o \
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lpfc_hbadisc.o lpfc_init.o lpfc_mbox.o lpfc_nportdisc.o \
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lpfc_hbadisc.o lpfc_init.o lpfc_mbox.o lpfc_nportdisc.o \
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lpfc_scsi.o lpfc_attr.o lpfc_vport.o lpfc_debugfs.o lpfc_bsg.o \
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lpfc_scsi.o lpfc_attr.o lpfc_vport.o lpfc_debugfs.o lpfc_bsg.o \
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lpfc_nvme.o lpfc_nvmet.o
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lpfc_nvme.o lpfc_nvmet.o lpfc_vmid.o
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@ -671,6 +671,8 @@ int lpfc_vmid_cmd(struct lpfc_vport *vport,
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int lpfc_vmid_hash_fn(const char *vmid, int len);
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int lpfc_vmid_hash_fn(const char *vmid, int len);
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struct lpfc_vmid *lpfc_get_vmid_from_hashtable(struct lpfc_vport *vport,
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struct lpfc_vmid *lpfc_get_vmid_from_hashtable(struct lpfc_vport *vport,
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uint32_t hash, uint8_t *buf);
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uint32_t hash, uint8_t *buf);
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int lpfc_vmid_get_appid(struct lpfc_vport *vport, char *uuid, struct
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scsi_cmnd * cmd, union lpfc_vmid_io_tag *tag);
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void lpfc_vmid_vport_cleanup(struct lpfc_vport *vport);
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void lpfc_vmid_vport_cleanup(struct lpfc_vport *vport);
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int lpfc_issue_els_qfpa(struct lpfc_vport *vport);
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int lpfc_issue_els_qfpa(struct lpfc_vport *vport);
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@ -87,14 +87,6 @@ static void
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lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_io_buf *psb);
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lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_io_buf *psb);
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static int
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static int
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lpfc_prot_group_type(struct lpfc_hba *phba, struct scsi_cmnd *sc);
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lpfc_prot_group_type(struct lpfc_hba *phba, struct scsi_cmnd *sc);
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static void
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lpfc_put_vmid_in_hashtable(struct lpfc_vport *vport, u32 hash,
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struct lpfc_vmid *vmp);
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static void lpfc_vmid_update_entry(struct lpfc_vport *vport, struct scsi_cmnd
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*cmd, struct lpfc_vmid *vmp,
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union lpfc_vmid_io_tag *tag);
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static void lpfc_vmid_assign_cs_ctl(struct lpfc_vport *vport,
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struct lpfc_vmid *vmid);
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/**
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/**
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* lpfc_sli4_set_rsp_sgl_last - Set the last bit in the response sge.
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* lpfc_sli4_set_rsp_sgl_last - Set the last bit in the response sge.
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@ -5270,254 +5262,6 @@ void lpfc_poll_timeout(struct timer_list *t)
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}
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}
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}
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}
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/*
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* lpfc_get_vmid_from_hashtable - search the UUID in the hash table
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* @vport: The virtual port for which this call is being executed.
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* @hash: calculated hash value
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* @buf: uuid associated with the VE
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* Return the VMID entry associated with the UUID
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* Make sure to acquire the appropriate lock before invoking this routine.
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*/
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struct lpfc_vmid *lpfc_get_vmid_from_hashtable(struct lpfc_vport *vport,
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u32 hash, u8 *buf)
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{
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struct lpfc_vmid *vmp;
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hash_for_each_possible(vport->hash_table, vmp, hnode, hash) {
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if (memcmp(&vmp->host_vmid[0], buf, 16) == 0)
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return vmp;
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}
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return NULL;
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}
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/*
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* lpfc_put_vmid_in_hashtable - put the VMID in the hash table
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* @vport: The virtual port for which this call is being executed.
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* @hash - calculated hash value
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* @vmp: Pointer to a VMID entry representing a VM sending I/O
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*
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* This routine will insert the newly acquired VMID entity in the hash table.
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* Make sure to acquire the appropriate lock before invoking this routine.
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*/
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static void
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lpfc_put_vmid_in_hashtable(struct lpfc_vport *vport, u32 hash,
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struct lpfc_vmid *vmp)
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{
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hash_add(vport->hash_table, &vmp->hnode, hash);
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}
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/*
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* lpfc_vmid_hash_fn - create a hash value of the UUID
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* @vmid: uuid associated with the VE
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* @len: length of the VMID string
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* Returns the calculated hash value
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*/
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int lpfc_vmid_hash_fn(const char *vmid, int len)
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{
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int c;
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int hash = 0;
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if (len == 0)
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return 0;
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while (len--) {
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c = *vmid++;
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if (c >= 'A' && c <= 'Z')
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c += 'a' - 'A';
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hash = (hash + (c << LPFC_VMID_HASH_SHIFT) +
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(c >> LPFC_VMID_HASH_SHIFT)) * 19;
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}
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return hash & LPFC_VMID_HASH_MASK;
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}
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/*
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* lpfc_vmid_update_entry - update the vmid entry in the hash table
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* @vport: The virtual port for which this call is being executed.
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* @cmd: address of scsi cmd descriptor
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* @vmp: Pointer to a VMID entry representing a VM sending I/O
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* @tag: VMID tag
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*/
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static void lpfc_vmid_update_entry(struct lpfc_vport *vport, struct scsi_cmnd
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*cmd, struct lpfc_vmid *vmp,
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union lpfc_vmid_io_tag *tag)
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{
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u64 *lta;
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if (vport->phba->pport->vmid_flag & LPFC_VMID_TYPE_PRIO)
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tag->cs_ctl_vmid = vmp->un.cs_ctl_vmid;
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else if (vport->phba->cfg_vmid_app_header)
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tag->app_id = vmp->un.app_id;
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if (cmd->sc_data_direction == DMA_TO_DEVICE)
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vmp->io_wr_cnt++;
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else
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vmp->io_rd_cnt++;
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/* update the last access timestamp in the table */
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lta = per_cpu_ptr(vmp->last_io_time, raw_smp_processor_id());
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*lta = jiffies;
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}
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static void lpfc_vmid_assign_cs_ctl(struct lpfc_vport *vport,
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struct lpfc_vmid *vmid)
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{
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u32 hash;
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struct lpfc_vmid *pvmid;
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if (vport->port_type == LPFC_PHYSICAL_PORT) {
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vmid->un.cs_ctl_vmid = lpfc_vmid_get_cs_ctl(vport);
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} else {
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hash = lpfc_vmid_hash_fn(vmid->host_vmid, vmid->vmid_len);
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pvmid =
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lpfc_get_vmid_from_hashtable(vport->phba->pport, hash,
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vmid->host_vmid);
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if (pvmid)
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vmid->un.cs_ctl_vmid = pvmid->un.cs_ctl_vmid;
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else
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vmid->un.cs_ctl_vmid = lpfc_vmid_get_cs_ctl(vport);
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}
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}
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/*
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* lpfc_vmid_get_appid - get the VMID associated with the UUID
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* @vport: The virtual port for which this call is being executed.
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* @uuid: UUID associated with the VE
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* @cmd: address of scsi_cmd descriptor
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* @tag: VMID tag
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* Returns status of the function
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*/
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static int lpfc_vmid_get_appid(struct lpfc_vport *vport, char *uuid, struct
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scsi_cmnd * cmd, union lpfc_vmid_io_tag *tag)
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{
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struct lpfc_vmid *vmp = NULL;
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int hash, len, rc = -EPERM, i;
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/* check if QFPA is complete */
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if (lpfc_vmid_is_type_priority_tag(vport) &&
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!(vport->vmid_flag & LPFC_VMID_QFPA_CMPL) &&
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(vport->vmid_flag & LPFC_VMID_ISSUE_QFPA)) {
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vport->work_port_events |= WORKER_CHECK_VMID_ISSUE_QFPA;
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return -EAGAIN;
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}
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/* search if the UUID has already been mapped to the VMID */
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len = strlen(uuid);
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hash = lpfc_vmid_hash_fn(uuid, len);
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/* search for the VMID in the table */
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read_lock(&vport->vmid_lock);
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vmp = lpfc_get_vmid_from_hashtable(vport, hash, uuid);
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/* if found, check if its already registered */
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if (vmp && vmp->flag & LPFC_VMID_REGISTERED) {
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read_unlock(&vport->vmid_lock);
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lpfc_vmid_update_entry(vport, cmd, vmp, tag);
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rc = 0;
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} else if (vmp && (vmp->flag & LPFC_VMID_REQ_REGISTER ||
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vmp->flag & LPFC_VMID_DE_REGISTER)) {
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/* else if register or dereg request has already been sent */
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/* Hence VMID tag will not be added for this I/O */
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read_unlock(&vport->vmid_lock);
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rc = -EBUSY;
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} else {
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/* The VMID was not found in the hashtable. At this point, */
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/* drop the read lock first before proceeding further */
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read_unlock(&vport->vmid_lock);
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/* start the process to obtain one as per the */
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/* type of the VMID indicated */
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write_lock(&vport->vmid_lock);
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vmp = lpfc_get_vmid_from_hashtable(vport, hash, uuid);
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/* while the read lock was released, in case the entry was */
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/* added by other context or is in process of being added */
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if (vmp && vmp->flag & LPFC_VMID_REGISTERED) {
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lpfc_vmid_update_entry(vport, cmd, vmp, tag);
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write_unlock(&vport->vmid_lock);
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return 0;
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} else if (vmp && vmp->flag & LPFC_VMID_REQ_REGISTER) {
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write_unlock(&vport->vmid_lock);
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return -EBUSY;
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}
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/* else search and allocate a free slot in the hash table */
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if (vport->cur_vmid_cnt < vport->max_vmid) {
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for (i = 0; i < vport->max_vmid; i++) {
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vmp = vport->vmid + i;
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if (vmp->flag == LPFC_VMID_SLOT_FREE)
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break;
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}
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if (i == vport->max_vmid)
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vmp = NULL;
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} else {
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vmp = NULL;
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}
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if (!vmp) {
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write_unlock(&vport->vmid_lock);
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return -ENOMEM;
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}
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/* Add the vmid and register */
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lpfc_put_vmid_in_hashtable(vport, hash, vmp);
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vmp->vmid_len = len;
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memcpy(vmp->host_vmid, uuid, vmp->vmid_len);
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vmp->io_rd_cnt = 0;
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vmp->io_wr_cnt = 0;
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vmp->flag = LPFC_VMID_SLOT_USED;
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vmp->delete_inactive =
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vport->vmid_inactivity_timeout ? 1 : 0;
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/* if type priority tag, get next available VMID */
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if (vport->phba->pport->vmid_flag & LPFC_VMID_TYPE_PRIO)
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lpfc_vmid_assign_cs_ctl(vport, vmp);
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/* allocate the per cpu variable for holding */
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/* the last access time stamp only if VMID is enabled */
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if (!vmp->last_io_time)
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vmp->last_io_time = __alloc_percpu(sizeof(u64),
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__alignof__(struct
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lpfc_vmid));
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if (!vmp->last_io_time) {
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hash_del(&vmp->hnode);
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vmp->flag = LPFC_VMID_SLOT_FREE;
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write_unlock(&vport->vmid_lock);
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return -EIO;
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}
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write_unlock(&vport->vmid_lock);
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/* complete transaction with switch */
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if (vport->phba->pport->vmid_flag & LPFC_VMID_TYPE_PRIO)
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rc = lpfc_vmid_uvem(vport, vmp, true);
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else if (vport->phba->cfg_vmid_app_header)
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rc = lpfc_vmid_cmd(vport, SLI_CTAS_RAPP_IDENT, vmp);
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if (!rc) {
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write_lock(&vport->vmid_lock);
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vport->cur_vmid_cnt++;
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vmp->flag |= LPFC_VMID_REQ_REGISTER;
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write_unlock(&vport->vmid_lock);
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} else {
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write_lock(&vport->vmid_lock);
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hash_del(&vmp->hnode);
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vmp->flag = LPFC_VMID_SLOT_FREE;
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free_percpu(vmp->last_io_time);
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write_unlock(&vport->vmid_lock);
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return -EIO;
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}
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/* finally, enable the idle timer once */
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if (!(vport->phba->pport->vmid_flag & LPFC_VMID_TIMER_ENBLD)) {
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mod_timer(&vport->phba->inactive_vmid_poll,
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jiffies +
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msecs_to_jiffies(1000 * LPFC_VMID_TIMER));
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vport->phba->pport->vmid_flag |= LPFC_VMID_TIMER_ENBLD;
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}
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}
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return rc;
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}
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/*
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/*
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* lpfc_is_command_vm_io - get the UUID from blk cgroup
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* lpfc_is_command_vm_io - get the UUID from blk cgroup
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* @cmd: Pointer to scsi_cmnd data structure
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* @cmd: Pointer to scsi_cmnd data structure
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288
drivers/scsi/lpfc/lpfc_vmid.c
Normal file
288
drivers/scsi/lpfc/lpfc_vmid.c
Normal file
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@ -0,0 +1,288 @@
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/*******************************************************************
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* This file is part of the Emulex Linux Device Driver for *
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* Fibre Channel Host Bus Adapters. *
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* Copyright (C) 2017-2022 Broadcom. All Rights Reserved. The term *
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* “Broadcom” refers to Broadcom Inc. and/or its subsidiaries. *
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* Copyright (C) 2004-2016 Emulex. All rights reserved. *
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* EMULEX and SLI are trademarks of Emulex. *
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* www.broadcom.com *
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* Portions Copyright (C) 2004-2005 Christoph Hellwig *
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* *
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* This program is free software; you can redistribute it and/or *
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* modify it under the terms of version 2 of the GNU General *
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* Public License as published by the Free Software Foundation. *
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* This program is distributed in the hope that it will be useful. *
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* ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND *
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* WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, *
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* FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE *
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* DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
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* TO BE LEGALLY INVALID. See the GNU General Public License for *
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* more details, a copy of which can be found in the file COPYING *
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* included with this package. *
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|
*******************************************************************/
|
||||||
|
|
||||||
|
#include <linux/interrupt.h>
|
||||||
|
#include <linux/dma-direction.h>
|
||||||
|
|
||||||
|
#include <scsi/scsi_transport_fc.h>
|
||||||
|
|
||||||
|
#include "lpfc_hw4.h"
|
||||||
|
#include "lpfc_hw.h"
|
||||||
|
#include "lpfc_sli.h"
|
||||||
|
#include "lpfc_sli4.h"
|
||||||
|
#include "lpfc_nl.h"
|
||||||
|
#include "lpfc_disc.h"
|
||||||
|
#include "lpfc.h"
|
||||||
|
#include "lpfc_crtn.h"
|
||||||
|
|
||||||
|
|
||||||
|
/*
|
||||||
|
* lpfc_get_vmid_from_hashtable - search the UUID in the hash table
|
||||||
|
* @vport: The virtual port for which this call is being executed.
|
||||||
|
* @hash: calculated hash value
|
||||||
|
* @buf: uuid associated with the VE
|
||||||
|
* Return the VMID entry associated with the UUID
|
||||||
|
* Make sure to acquire the appropriate lock before invoking this routine.
|
||||||
|
*/
|
||||||
|
struct lpfc_vmid *lpfc_get_vmid_from_hashtable(struct lpfc_vport *vport,
|
||||||
|
u32 hash, u8 *buf)
|
||||||
|
{
|
||||||
|
struct lpfc_vmid *vmp;
|
||||||
|
|
||||||
|
hash_for_each_possible(vport->hash_table, vmp, hnode, hash) {
|
||||||
|
if (memcmp(&vmp->host_vmid[0], buf, 16) == 0)
|
||||||
|
return vmp;
|
||||||
|
}
|
||||||
|
return NULL;
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* lpfc_put_vmid_in_hashtable - put the VMID in the hash table
|
||||||
|
* @vport: The virtual port for which this call is being executed.
|
||||||
|
* @hash - calculated hash value
|
||||||
|
* @vmp: Pointer to a VMID entry representing a VM sending I/O
|
||||||
|
*
|
||||||
|
* This routine will insert the newly acquired VMID entity in the hash table.
|
||||||
|
* Make sure to acquire the appropriate lock before invoking this routine.
|
||||||
|
*/
|
||||||
|
static void
|
||||||
|
lpfc_put_vmid_in_hashtable(struct lpfc_vport *vport, u32 hash,
|
||||||
|
struct lpfc_vmid *vmp)
|
||||||
|
{
|
||||||
|
hash_add(vport->hash_table, &vmp->hnode, hash);
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* lpfc_vmid_hash_fn - create a hash value of the UUID
|
||||||
|
* @vmid: uuid associated with the VE
|
||||||
|
* @len: length of the VMID string
|
||||||
|
* Returns the calculated hash value
|
||||||
|
*/
|
||||||
|
int lpfc_vmid_hash_fn(const char *vmid, int len)
|
||||||
|
{
|
||||||
|
int c;
|
||||||
|
int hash = 0;
|
||||||
|
|
||||||
|
if (len == 0)
|
||||||
|
return 0;
|
||||||
|
while (len--) {
|
||||||
|
c = *vmid++;
|
||||||
|
if (c >= 'A' && c <= 'Z')
|
||||||
|
c += 'a' - 'A';
|
||||||
|
|
||||||
|
hash = (hash + (c << LPFC_VMID_HASH_SHIFT) +
|
||||||
|
(c >> LPFC_VMID_HASH_SHIFT)) * 19;
|
||||||
|
}
|
||||||
|
|
||||||
|
return hash & LPFC_VMID_HASH_MASK;
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* lpfc_vmid_update_entry - update the vmid entry in the hash table
|
||||||
|
* @vport: The virtual port for which this call is being executed.
|
||||||
|
* @iodir: io direction
|
||||||
|
* @vmp: Pointer to a VMID entry representing a VM sending I/O
|
||||||
|
* @tag: VMID tag
|
||||||
|
*/
|
||||||
|
static void lpfc_vmid_update_entry(struct lpfc_vport *vport,
|
||||||
|
enum dma_data_direction iodir,
|
||||||
|
struct lpfc_vmid *vmp,
|
||||||
|
union lpfc_vmid_io_tag *tag)
|
||||||
|
{
|
||||||
|
u64 *lta;
|
||||||
|
|
||||||
|
if (vport->phba->pport->vmid_flag & LPFC_VMID_TYPE_PRIO)
|
||||||
|
tag->cs_ctl_vmid = vmp->un.cs_ctl_vmid;
|
||||||
|
else if (vport->phba->cfg_vmid_app_header)
|
||||||
|
tag->app_id = vmp->un.app_id;
|
||||||
|
|
||||||
|
if (iodir == DMA_TO_DEVICE)
|
||||||
|
vmp->io_wr_cnt++;
|
||||||
|
else if (iodir == DMA_FROM_DEVICE)
|
||||||
|
vmp->io_rd_cnt++;
|
||||||
|
|
||||||
|
/* update the last access timestamp in the table */
|
||||||
|
lta = per_cpu_ptr(vmp->last_io_time, raw_smp_processor_id());
|
||||||
|
*lta = jiffies;
|
||||||
|
}
|
||||||
|
|
||||||
|
static void lpfc_vmid_assign_cs_ctl(struct lpfc_vport *vport,
|
||||||
|
struct lpfc_vmid *vmid)
|
||||||
|
{
|
||||||
|
u32 hash;
|
||||||
|
struct lpfc_vmid *pvmid;
|
||||||
|
|
||||||
|
if (vport->port_type == LPFC_PHYSICAL_PORT) {
|
||||||
|
vmid->un.cs_ctl_vmid = lpfc_vmid_get_cs_ctl(vport);
|
||||||
|
} else {
|
||||||
|
hash = lpfc_vmid_hash_fn(vmid->host_vmid, vmid->vmid_len);
|
||||||
|
pvmid =
|
||||||
|
lpfc_get_vmid_from_hashtable(vport->phba->pport, hash,
|
||||||
|
vmid->host_vmid);
|
||||||
|
if (pvmid)
|
||||||
|
vmid->un.cs_ctl_vmid = pvmid->un.cs_ctl_vmid;
|
||||||
|
else
|
||||||
|
vmid->un.cs_ctl_vmid = lpfc_vmid_get_cs_ctl(vport);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* 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_cmd descriptor
|
||||||
|
* @iodir: io direction
|
||||||
|
* @tag: VMID tag
|
||||||
|
* Returns status of the function
|
||||||
|
*/
|
||||||
|
int lpfc_vmid_get_appid(struct lpfc_vport *vport, char *uuid,
|
||||||
|
enum dma_data_direction iodir,
|
||||||
|
union lpfc_vmid_io_tag *tag)
|
||||||
|
{
|
||||||
|
struct lpfc_vmid *vmp = NULL;
|
||||||
|
int hash, len, rc = -EPERM, i;
|
||||||
|
|
||||||
|
/* check if QFPA is complete */
|
||||||
|
if (lpfc_vmid_is_type_priority_tag(vport) &&
|
||||||
|
!(vport->vmid_flag & LPFC_VMID_QFPA_CMPL) &&
|
||||||
|
(vport->vmid_flag & LPFC_VMID_ISSUE_QFPA)) {
|
||||||
|
vport->work_port_events |= WORKER_CHECK_VMID_ISSUE_QFPA;
|
||||||
|
return -EAGAIN;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* 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_hashtable(vport, hash, uuid);
|
||||||
|
|
||||||
|
/* if found, check if its already registered */
|
||||||
|
if (vmp && vmp->flag & LPFC_VMID_REGISTERED) {
|
||||||
|
read_unlock(&vport->vmid_lock);
|
||||||
|
lpfc_vmid_update_entry(vport, iodir, 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 I/O */
|
||||||
|
read_unlock(&vport->vmid_lock);
|
||||||
|
rc = -EBUSY;
|
||||||
|
} else {
|
||||||
|
/* The VMID was not found in the hashtable. At this point, */
|
||||||
|
/* drop the read lock first before proceeding further */
|
||||||
|
read_unlock(&vport->vmid_lock);
|
||||||
|
/* start the process to obtain one as per the */
|
||||||
|
/* type of the VMID indicated */
|
||||||
|
write_lock(&vport->vmid_lock);
|
||||||
|
vmp = lpfc_get_vmid_from_hashtable(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, iodir, vmp, tag);
|
||||||
|
write_unlock(&vport->vmid_lock);
|
||||||
|
return 0;
|
||||||
|
} else if (vmp && vmp->flag & LPFC_VMID_REQ_REGISTER) {
|
||||||
|
write_unlock(&vport->vmid_lock);
|
||||||
|
return -EBUSY;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* 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)
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
if (i == vport->max_vmid)
|
||||||
|
vmp = NULL;
|
||||||
|
} else {
|
||||||
|
vmp = NULL;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (!vmp) {
|
||||||
|
write_unlock(&vport->vmid_lock);
|
||||||
|
return -ENOMEM;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Add the vmid and register */
|
||||||
|
lpfc_put_vmid_in_hashtable(vport, hash, vmp);
|
||||||
|
vmp->vmid_len = len;
|
||||||
|
memcpy(vmp->host_vmid, uuid, vmp->vmid_len);
|
||||||
|
vmp->io_rd_cnt = 0;
|
||||||
|
vmp->io_wr_cnt = 0;
|
||||||
|
vmp->flag = LPFC_VMID_SLOT_USED;
|
||||||
|
|
||||||
|
vmp->delete_inactive =
|
||||||
|
vport->vmid_inactivity_timeout ? 1 : 0;
|
||||||
|
|
||||||
|
/* if type priority tag, get next available VMID */
|
||||||
|
if (vport->phba->pport->vmid_flag & LPFC_VMID_TYPE_PRIO)
|
||||||
|
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));
|
||||||
|
if (!vmp->last_io_time) {
|
||||||
|
hash_del(&vmp->hnode);
|
||||||
|
vmp->flag = LPFC_VMID_SLOT_FREE;
|
||||||
|
write_unlock(&vport->vmid_lock);
|
||||||
|
return -EIO;
|
||||||
|
}
|
||||||
|
|
||||||
|
write_unlock(&vport->vmid_lock);
|
||||||
|
|
||||||
|
/* complete transaction with switch */
|
||||||
|
if (vport->phba->pport->vmid_flag & LPFC_VMID_TYPE_PRIO)
|
||||||
|
rc = lpfc_vmid_uvem(vport, vmp, true);
|
||||||
|
else if (vport->phba->cfg_vmid_app_header)
|
||||||
|
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);
|
||||||
|
} else {
|
||||||
|
write_lock(&vport->vmid_lock);
|
||||||
|
hash_del(&vmp->hnode);
|
||||||
|
vmp->flag = LPFC_VMID_SLOT_FREE;
|
||||||
|
free_percpu(vmp->last_io_time);
|
||||||
|
write_unlock(&vport->vmid_lock);
|
||||||
|
return -EIO;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* 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;
|
||||||
|
}
|
||||||
Loading…
Add table
Reference in a new issue