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>

1 files changed, 0 insertions, 256 deletions

diff --git a/drivers/scsi/lpfc/lpfc_scsi.c b/drivers/scsi/lpfc/lpfc_scsi.c
index 1d134a01ff3e..70d0a4d3d92e 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