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path: root/drivers/scsi/cxlflash/lunmgt.c
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Diffstat (limited to 'drivers/scsi/cxlflash/lunmgt.c')
-rw-r--r--drivers/scsi/cxlflash/lunmgt.c278
1 files changed, 0 insertions, 278 deletions
diff --git a/drivers/scsi/cxlflash/lunmgt.c b/drivers/scsi/cxlflash/lunmgt.c
deleted file mode 100644
index e0e15b44a2e6..000000000000
--- a/drivers/scsi/cxlflash/lunmgt.c
+++ /dev/null
@@ -1,278 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * CXL Flash Device Driver
- *
- * Written by: Manoj N. Kumar <manoj@linux.vnet.ibm.com>, IBM Corporation
- * Matthew R. Ochs <mrochs@linux.vnet.ibm.com>, IBM Corporation
- *
- * Copyright (C) 2015 IBM Corporation
- */
-
-#include <asm/unaligned.h>
-
-#include <linux/interrupt.h>
-#include <linux/pci.h>
-
-#include <scsi/scsi_host.h>
-#include <uapi/scsi/cxlflash_ioctl.h>
-
-#include "sislite.h"
-#include "common.h"
-#include "vlun.h"
-#include "superpipe.h"
-
-/**
- * create_local() - allocate and initialize a local LUN information structure
- * @sdev: SCSI device associated with LUN.
- * @wwid: World Wide Node Name for LUN.
- *
- * Return: Allocated local llun_info structure on success, NULL on failure
- */
-static struct llun_info *create_local(struct scsi_device *sdev, u8 *wwid)
-{
- struct cxlflash_cfg *cfg = shost_priv(sdev->host);
- struct device *dev = &cfg->dev->dev;
- struct llun_info *lli = NULL;
-
- lli = kzalloc(sizeof(*lli), GFP_KERNEL);
- if (unlikely(!lli)) {
- dev_err(dev, "%s: could not allocate lli\n", __func__);
- goto out;
- }
-
- lli->sdev = sdev;
- lli->host_no = sdev->host->host_no;
- lli->in_table = false;
-
- memcpy(lli->wwid, wwid, DK_CXLFLASH_MANAGE_LUN_WWID_LEN);
-out:
- return lli;
-}
-
-/**
- * create_global() - allocate and initialize a global LUN information structure
- * @sdev: SCSI device associated with LUN.
- * @wwid: World Wide Node Name for LUN.
- *
- * Return: Allocated global glun_info structure on success, NULL on failure
- */
-static struct glun_info *create_global(struct scsi_device *sdev, u8 *wwid)
-{
- struct cxlflash_cfg *cfg = shost_priv(sdev->host);
- struct device *dev = &cfg->dev->dev;
- struct glun_info *gli = NULL;
-
- gli = kzalloc(sizeof(*gli), GFP_KERNEL);
- if (unlikely(!gli)) {
- dev_err(dev, "%s: could not allocate gli\n", __func__);
- goto out;
- }
-
- mutex_init(&gli->mutex);
- memcpy(gli->wwid, wwid, DK_CXLFLASH_MANAGE_LUN_WWID_LEN);
-out:
- return gli;
-}
-
-/**
- * lookup_local() - find a local LUN information structure by WWID
- * @cfg: Internal structure associated with the host.
- * @wwid: WWID associated with LUN.
- *
- * Return: Found local lun_info structure on success, NULL on failure
- */
-static struct llun_info *lookup_local(struct cxlflash_cfg *cfg, u8 *wwid)
-{
- struct llun_info *lli, *temp;
-
- list_for_each_entry_safe(lli, temp, &cfg->lluns, list)
- if (!memcmp(lli->wwid, wwid, DK_CXLFLASH_MANAGE_LUN_WWID_LEN))
- return lli;
-
- return NULL;
-}
-
-/**
- * lookup_global() - find a global LUN information structure by WWID
- * @wwid: WWID associated with LUN.
- *
- * Return: Found global lun_info structure on success, NULL on failure
- */
-static struct glun_info *lookup_global(u8 *wwid)
-{
- struct glun_info *gli, *temp;
-
- list_for_each_entry_safe(gli, temp, &global.gluns, list)
- if (!memcmp(gli->wwid, wwid, DK_CXLFLASH_MANAGE_LUN_WWID_LEN))
- return gli;
-
- return NULL;
-}
-
-/**
- * find_and_create_lun() - find or create a local LUN information structure
- * @sdev: SCSI device associated with LUN.
- * @wwid: WWID associated with LUN.
- *
- * The LUN is kept both in a local list (per adapter) and in a global list
- * (across all adapters). Certain attributes of the LUN are local to the
- * adapter (such as index, port selection mask, etc.).
- *
- * The block allocation map is shared across all adapters (i.e. associated
- * wih the global list). Since different attributes are associated with
- * the per adapter and global entries, allocate two separate structures for each
- * LUN (one local, one global).
- *
- * Keep a pointer back from the local to the global entry.
- *
- * This routine assumes the caller holds the global mutex.
- *
- * Return: Found/Allocated local lun_info structure on success, NULL on failure
- */
-static struct llun_info *find_and_create_lun(struct scsi_device *sdev, u8 *wwid)
-{
- struct cxlflash_cfg *cfg = shost_priv(sdev->host);
- struct device *dev = &cfg->dev->dev;
- struct llun_info *lli = NULL;
- struct glun_info *gli = NULL;
-
- if (unlikely(!wwid))
- goto out;
-
- lli = lookup_local(cfg, wwid);
- if (lli)
- goto out;
-
- lli = create_local(sdev, wwid);
- if (unlikely(!lli))
- goto out;
-
- gli = lookup_global(wwid);
- if (gli) {
- lli->parent = gli;
- list_add(&lli->list, &cfg->lluns);
- goto out;
- }
-
- gli = create_global(sdev, wwid);
- if (unlikely(!gli)) {
- kfree(lli);
- lli = NULL;
- goto out;
- }
-
- lli->parent = gli;
- list_add(&lli->list, &cfg->lluns);
-
- list_add(&gli->list, &global.gluns);
-
-out:
- dev_dbg(dev, "%s: returning lli=%p, gli=%p\n", __func__, lli, gli);
- return lli;
-}
-
-/**
- * cxlflash_term_local_luns() - Delete all entries from local LUN list, free.
- * @cfg: Internal structure associated with the host.
- */
-void cxlflash_term_local_luns(struct cxlflash_cfg *cfg)
-{
- struct llun_info *lli, *temp;
-
- mutex_lock(&global.mutex);
- list_for_each_entry_safe(lli, temp, &cfg->lluns, list) {
- list_del(&lli->list);
- kfree(lli);
- }
- mutex_unlock(&global.mutex);
-}
-
-/**
- * cxlflash_list_init() - initializes the global LUN list
- */
-void cxlflash_list_init(void)
-{
- INIT_LIST_HEAD(&global.gluns);
- mutex_init(&global.mutex);
- global.err_page = NULL;
-}
-
-/**
- * cxlflash_term_global_luns() - frees resources associated with global LUN list
- */
-void cxlflash_term_global_luns(void)
-{
- struct glun_info *gli, *temp;
-
- mutex_lock(&global.mutex);
- list_for_each_entry_safe(gli, temp, &global.gluns, list) {
- list_del(&gli->list);
- cxlflash_ba_terminate(&gli->blka.ba_lun);
- kfree(gli);
- }
- mutex_unlock(&global.mutex);
-}
-
-/**
- * cxlflash_manage_lun() - handles LUN management activities
- * @sdev: SCSI device associated with LUN.
- * @manage: Manage ioctl data structure.
- *
- * This routine is used to notify the driver about a LUN's WWID and associate
- * SCSI devices (sdev) with a global LUN instance. Additionally it serves to
- * change a LUN's operating mode: legacy or superpipe.
- *
- * Return: 0 on success, -errno on failure
- */
-int cxlflash_manage_lun(struct scsi_device *sdev,
- struct dk_cxlflash_manage_lun *manage)
-{
- struct cxlflash_cfg *cfg = shost_priv(sdev->host);
- struct device *dev = &cfg->dev->dev;
- struct llun_info *lli = NULL;
- int rc = 0;
- u64 flags = manage->hdr.flags;
- u32 chan = sdev->channel;
-
- mutex_lock(&global.mutex);
- lli = find_and_create_lun(sdev, manage->wwid);
- dev_dbg(dev, "%s: WWID=%016llx%016llx, flags=%016llx lli=%p\n",
- __func__, get_unaligned_be64(&manage->wwid[0]),
- get_unaligned_be64(&manage->wwid[8]), manage->hdr.flags, lli);
- if (unlikely(!lli)) {
- rc = -ENOMEM;
- goto out;
- }
-
- if (flags & DK_CXLFLASH_MANAGE_LUN_ENABLE_SUPERPIPE) {
- /*
- * Update port selection mask based upon channel, store off LUN
- * in unpacked, AFU-friendly format, and hang LUN reference in
- * the sdev.
- */
- lli->port_sel |= CHAN2PORTMASK(chan);
- lli->lun_id[chan] = lun_to_lunid(sdev->lun);
- sdev->hostdata = lli;
- } else if (flags & DK_CXLFLASH_MANAGE_LUN_DISABLE_SUPERPIPE) {
- if (lli->parent->mode != MODE_NONE)
- rc = -EBUSY;
- else {
- /*
- * Clean up local LUN for this port and reset table
- * tracking when no more references exist.
- */
- sdev->hostdata = NULL;
- lli->port_sel &= ~CHAN2PORTMASK(chan);
- if (lli->port_sel == 0U)
- lli->in_table = false;
- }
- }
-
- dev_dbg(dev, "%s: port_sel=%08x chan=%u lun_id=%016llx\n",
- __func__, lli->port_sel, chan, lli->lun_id[chan]);
-
-out:
- mutex_unlock(&global.mutex);
- dev_dbg(dev, "%s: returning rc=%d\n", __func__, rc);
- return rc;
-}
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