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path: root/drivers/scsi/lpfc/lpfc_scsi.c
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Diffstat (limited to 'drivers/scsi/lpfc/lpfc_scsi.c')
-rw-r--r--drivers/scsi/lpfc/lpfc_scsi.c263
1 files changed, 4 insertions, 259 deletions
diff --git a/drivers/scsi/lpfc/lpfc_scsi.c b/drivers/scsi/lpfc/lpfc_scsi.c
index 3b8afa9d3056..d43968203248 100644
--- a/drivers/scsi/lpfc/lpfc_scsi.c
+++ b/drivers/scsi/lpfc/lpfc_scsi.c
@@ -87,14 +87,6 @@ static void
lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_io_buf *psb);
static int
lpfc_prot_group_type(struct lpfc_hba *phba, struct scsi_cmnd *sc);
-static void
-lpfc_put_vmid_in_hashtable(struct lpfc_vport *vport, u32 hash,
- struct lpfc_vmid *vmp);
-static void lpfc_vmid_update_entry(struct lpfc_vport *vport, struct scsi_cmnd
- *cmd, struct lpfc_vmid *vmp,
- union lpfc_vmid_io_tag *tag);
-static void lpfc_vmid_assign_cs_ctl(struct lpfc_vport *vport,
- struct lpfc_vmid *vmid);
/**
* lpfc_sli4_set_rsp_sgl_last - Set the last bit in the response sge.
@@ -5271,254 +5263,6 @@ void lpfc_poll_timeout(struct timer_list *t)
}
/*
- * 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.
- * @cmd: address of scsi cmd descriptor
- * @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, struct scsi_cmnd
- *cmd, 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 (cmd->sc_data_direction == DMA_TO_DEVICE)
- vmp->io_wr_cnt++;
- else
- 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
- * @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 = -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, 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 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, 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 -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;
-}
-
-/*
* lpfc_is_command_vm_io - get the UUID from blk cgroup
* @cmd: Pointer to scsi_cmnd data structure
* Returns UUID if present, otherwise NULL
@@ -5704,9 +5448,10 @@ lpfc_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *cmnd)
uuid = lpfc_is_command_vm_io(cmnd);
if (uuid) {
- err = lpfc_vmid_get_appid(vport, uuid, cmnd,
- (union lpfc_vmid_io_tag *)
- &cur_iocbq->vmid_tag);
+ err = lpfc_vmid_get_appid(vport, uuid,
+ cmnd->sc_data_direction,
+ (union lpfc_vmid_io_tag *)
+ &cur_iocbq->vmid_tag);
if (!err)
cur_iocbq->cmd_flag |= LPFC_IO_VMID;
}