OSCL-LXR linux-6.0.1/​drivers/​scsi/​mpi3mr/​mpi3mr_os.c	Source navigation Diff markup Identifier search General search
	Version: linux-6.0.1 spark-3.0.0 hadoop-3.2.0-src hadoop-3.3.0-src spark-2.4.7 linux-4.15.13 hadoop-2.7.4-src Revert   Change

 // SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Driver for Broadcom MPI3 Storage Controllers
  *
  * Copyright (C) 2017-2022 Broadcom Inc.
  *  (mailto: mpi3mr-linuxdrv.pdl@broadcom.com)
  *
  */
 
 #include "mpi3mr.h"
 
 /* global driver scop variables */
 LIST_HEAD(mrioc_list);
 DEFINE_SPINLOCK(mrioc_list_lock);
 static int mrioc_ids;
 static int warn_non_secure_ctlr;
 atomic64_t event_counter;
 
 MODULE_AUTHOR(MPI3MR_DRIVER_AUTHOR);
 MODULE_DESCRIPTION(MPI3MR_DRIVER_DESC);
 MODULE_LICENSE(MPI3MR_DRIVER_LICENSE);
 MODULE_VERSION(MPI3MR_DRIVER_VERSION);
 
 /* Module parameters*/
 int prot_mask = -1;
 module_param(prot_mask, int, 0);
 MODULE_PARM_DESC(prot_mask, "Host protection capabilities mask, def=0x07");
 
 static int prot_guard_mask = 3;
 module_param(prot_guard_mask, int, 0);
 MODULE_PARM_DESC(prot_guard_mask, " Host protection guard mask, def=3");
 static int logging_level;
 module_param(logging_level, int, 0);
 MODULE_PARM_DESC(logging_level,
     " bits for enabling additional logging info (default=0)");
 
 /* Forward declarations*/
 static void mpi3mr_send_event_ack(struct mpi3mr_ioc *mrioc, u8 event,
     struct mpi3mr_drv_cmd *cmdparam, u32 event_ctx);
 
 #define MPI3MR_DRIVER_EVENT_TG_QD_REDUCTION (0xFFFF)
 
 /**
  * mpi3mr_host_tag_for_scmd - Get host tag for a scmd
  * @mrioc: Adapter instance reference
  * @scmd: SCSI command reference
  *
  * Calculate the host tag based on block tag for a given scmd.
  *
  * Return: Valid host tag or MPI3MR_HOSTTAG_INVALID.
  */
 static u16 mpi3mr_host_tag_for_scmd(struct mpi3mr_ioc *mrioc,
     struct scsi_cmnd *scmd)
 {
     struct scmd_priv *priv = NULL;
     u32 unique_tag;
     u16 host_tag, hw_queue;
 
     unique_tag = blk_mq_unique_tag(scsi_cmd_to_rq(scmd));
 
     hw_queue = blk_mq_unique_tag_to_hwq(unique_tag);
     if (hw_queue >= mrioc->num_op_reply_q)
         return MPI3MR_HOSTTAG_INVALID;
     host_tag = blk_mq_unique_tag_to_tag(unique_tag);
 
     if (WARN_ON(host_tag >= mrioc->max_host_ios))
         return MPI3MR_HOSTTAG_INVALID;
 
     priv = scsi_cmd_priv(scmd);
     /*host_tag 0 is invalid hence incrementing by 1*/
     priv->host_tag = host_tag + 1;
     priv->scmd = scmd;
     priv->in_lld_scope = 1;
     priv->req_q_idx = hw_queue;
     priv->meta_chain_idx = -1;
     priv->chain_idx = -1;
     priv->meta_sg_valid = 0;
     return priv->host_tag;
 }
 
 /**
  * mpi3mr_scmd_from_host_tag - Get SCSI command from host tag
  * @mrioc: Adapter instance reference
  * @host_tag: Host tag
  * @qidx: Operational queue index
  *
  * Identify the block tag from the host tag and queue index and
  * retrieve associated scsi command using scsi_host_find_tag().
  *
  * Return: SCSI command reference or NULL.
  */
 static struct scsi_cmnd *mpi3mr_scmd_from_host_tag(
     struct mpi3mr_ioc *mrioc, u16 host_tag, u16 qidx)
 {
     struct scsi_cmnd *scmd = NULL;
     struct scmd_priv *priv = NULL;
     u32 unique_tag = host_tag - 1;
 
     if (WARN_ON(host_tag > mrioc->max_host_ios))
         goto out;
 
     unique_tag |= (qidx << BLK_MQ_UNIQUE_TAG_BITS);
 
     scmd = scsi_host_find_tag(mrioc->shost, unique_tag);
     if (scmd) {
         priv = scsi_cmd_priv(scmd);
         if (!priv->in_lld_scope)
             scmd = NULL;
     }
 out:
     return scmd;
 }
 
 /**
  * mpi3mr_clear_scmd_priv - Cleanup SCSI command private date
  * @mrioc: Adapter instance reference
  * @scmd: SCSI command reference
  *
  * Invalidate the SCSI command private data to mark the command
  * is not in LLD scope anymore.
  *
  * Return: Nothing.
  */
 static void mpi3mr_clear_scmd_priv(struct mpi3mr_ioc *mrioc,
     struct scsi_cmnd *scmd)
 {
     struct scmd_priv *priv = NULL;
 
     priv = scsi_cmd_priv(scmd);
 
     if (WARN_ON(priv->in_lld_scope == 0))
         return;
     priv->host_tag = MPI3MR_HOSTTAG_INVALID;
     priv->req_q_idx = 0xFFFF;
     priv->scmd = NULL;
     priv->in_lld_scope = 0;
     priv->meta_sg_valid = 0;
     if (priv->chain_idx >= 0) {
         clear_bit(priv->chain_idx, mrioc->chain_bitmap);
         priv->chain_idx = -1;
     }
     if (priv->meta_chain_idx >= 0) {
         clear_bit(priv->meta_chain_idx, mrioc->chain_bitmap);
         priv->meta_chain_idx = -1;
     }
 }
 
 static void mpi3mr_dev_rmhs_send_tm(struct mpi3mr_ioc *mrioc, u16 handle,
     struct mpi3mr_drv_cmd *cmdparam, u8 iou_rc);
 static void mpi3mr_fwevt_worker(struct work_struct *work);
 
 /**
  * mpi3mr_fwevt_free - firmware event memory dealloctor
  * @r: k reference pointer of the firmware event
  *
  * Free firmware event memory when no reference.
  */
 static void mpi3mr_fwevt_free(struct kref *r)
 {
     kfree(container_of(r, struct mpi3mr_fwevt, ref_count));
 }
 
 /**
  * mpi3mr_fwevt_get - k reference incrementor
  * @fwevt: Firmware event reference
  *
  * Increment firmware event reference count.
  */
 static void mpi3mr_fwevt_get(struct mpi3mr_fwevt *fwevt)
 {
     kref_get(&fwevt->ref_count);
 }
 
 /**
  * mpi3mr_fwevt_put - k reference decrementor
  * @fwevt: Firmware event reference
  *
  * decrement firmware event reference count.
  */
 static void mpi3mr_fwevt_put(struct mpi3mr_fwevt *fwevt)
 {
     kref_put(&fwevt->ref_count, mpi3mr_fwevt_free);
 }
 
 /**
  * mpi3mr_alloc_fwevt - Allocate firmware event
  * @len: length of firmware event data to allocate
  *
  * Allocate firmware event with required length and initialize
  * the reference counter.
  *
  * Return: firmware event reference.
  */
 static struct mpi3mr_fwevt *mpi3mr_alloc_fwevt(int len)
 {
     struct mpi3mr_fwevt *fwevt;
 
     fwevt = kzalloc(sizeof(*fwevt) + len, GFP_ATOMIC);
     if (!fwevt)
         return NULL;
 
     kref_init(&fwevt->ref_count);
     return fwevt;
 }
 
 /**
  * mpi3mr_fwevt_add_to_list - Add firmware event to the list
  * @mrioc: Adapter instance reference
  * @fwevt: Firmware event reference
  *
  * Add the given firmware event to the firmware event list.
  *
  * Return: Nothing.
  */
 static void mpi3mr_fwevt_add_to_list(struct mpi3mr_ioc *mrioc,
     struct mpi3mr_fwevt *fwevt)
 {
     unsigned long flags;
 
     if (!mrioc->fwevt_worker_thread)
         return;
 
     spin_lock_irqsave(&mrioc->fwevt_lock, flags);
     /* get fwevt reference count while adding it to fwevt_list */
     mpi3mr_fwevt_get(fwevt);
     INIT_LIST_HEAD(&fwevt->list);
     list_add_tail(&fwevt->list, &mrioc->fwevt_list);
     INIT_WORK(&fwevt->work, mpi3mr_fwevt_worker);
     /* get fwevt reference count while enqueueing it to worker queue */
     mpi3mr_fwevt_get(fwevt);
     queue_work(mrioc->fwevt_worker_thread, &fwevt->work);
     spin_unlock_irqrestore(&mrioc->fwevt_lock, flags);
 }
 
 /**
  * mpi3mr_fwevt_del_from_list - Delete firmware event from list
  * @mrioc: Adapter instance reference
  * @fwevt: Firmware event reference
  *
  * Delete the given firmware event from the firmware event list.
  *
  * Return: Nothing.
  */
 static void mpi3mr_fwevt_del_from_list(struct mpi3mr_ioc *mrioc,
     struct mpi3mr_fwevt *fwevt)
 {
     unsigned long flags;
 
     spin_lock_irqsave(&mrioc->fwevt_lock, flags);
     if (!list_empty(&fwevt->list)) {
         list_del_init(&fwevt->list);
         /*
          * Put fwevt reference count after
          * removing it from fwevt_list
          */
         mpi3mr_fwevt_put(fwevt);
     }
     spin_unlock_irqrestore(&mrioc->fwevt_lock, flags);
 }
 
 /**
  * mpi3mr_dequeue_fwevt - Dequeue firmware event from the list
  * @mrioc: Adapter instance reference
  *
  * Dequeue a firmware event from the firmware event list.
  *
  * Return: firmware event.
  */
 static struct mpi3mr_fwevt *mpi3mr_dequeue_fwevt(
     struct mpi3mr_ioc *mrioc)
 {
     unsigned long flags;
     struct mpi3mr_fwevt *fwevt = NULL;
 
     spin_lock_irqsave(&mrioc->fwevt_lock, flags);
     if (!list_empty(&mrioc->fwevt_list)) {
         fwevt = list_first_entry(&mrioc->fwevt_list,
             struct mpi3mr_fwevt, list);
         list_del_init(&fwevt->list);
         /*
          * Put fwevt reference count after
          * removing it from fwevt_list
          */
         mpi3mr_fwevt_put(fwevt);
     }
     spin_unlock_irqrestore(&mrioc->fwevt_lock, flags);
 
     return fwevt;
 }
 
 /**
  * mpi3mr_cancel_work - cancel firmware event
  * @fwevt: fwevt object which needs to be canceled
  *
  * Return: Nothing.
  */
 static void mpi3mr_cancel_work(struct mpi3mr_fwevt *fwevt)
 {
     /*
      * Wait on the fwevt to complete. If this returns 1, then
      * the event was never executed.
      *
      * If it did execute, we wait for it to finish, and the put will
      * happen from mpi3mr_process_fwevt()
      */
     if (cancel_work_sync(&fwevt->work)) {
         /*
          * Put fwevt reference count after
          * dequeuing it from worker queue
          */
         mpi3mr_fwevt_put(fwevt);
         /*
          * Put fwevt reference count to neutralize
          * kref_init increment
          */
         mpi3mr_fwevt_put(fwevt);
     }
 }
 
 /**
  * mpi3mr_cleanup_fwevt_list - Cleanup firmware event list
  * @mrioc: Adapter instance reference
  *
  * Flush all pending firmware events from the firmware event
  * list.
  *
  * Return: Nothing.
  */
 void mpi3mr_cleanup_fwevt_list(struct mpi3mr_ioc *mrioc)
 {
     struct mpi3mr_fwevt *fwevt = NULL;
 
     if ((list_empty(&mrioc->fwevt_list) && !mrioc->current_event) ||
         !mrioc->fwevt_worker_thread)
         return;
 
     while ((fwevt = mpi3mr_dequeue_fwevt(mrioc)))
         mpi3mr_cancel_work(fwevt);
 
     if (mrioc->current_event) {
         fwevt = mrioc->current_event;
         /*
          * Don't call cancel_work_sync() API for the
          * fwevt work if the controller reset is
          * get called as part of processing the
          * same fwevt work (or) when worker thread is
          * waiting for device add/remove APIs to complete.
          * Otherwise we will see deadlock.
          */
         if (current_work() == &fwevt->work || fwevt->pending_at_sml) {
             fwevt->discard = 1;
             return;
         }
 
         mpi3mr_cancel_work(fwevt);
     }
 }
 
 /**
  * mpi3mr_queue_qd_reduction_event - Queue TG QD reduction event
  * @mrioc: Adapter instance reference
  * @tg: Throttle group information pointer
  *
  * Accessor to queue on synthetically generated driver event to
  * the event worker thread, the driver event will be used to
  * reduce the QD of all VDs in the TG from the worker thread.
  *
  * Return: None.
  */
 static void mpi3mr_queue_qd_reduction_event(struct mpi3mr_ioc *mrioc,
     struct mpi3mr_throttle_group_info *tg)
 {
     struct mpi3mr_fwevt *fwevt;
     u16 sz = sizeof(struct mpi3mr_throttle_group_info *);
 
     /*
      * If the QD reduction event is already queued due to throttle and if
      * the QD is not restored through device info change event
      * then dont queue further reduction events
      */
     if (tg->fw_qd != tg->modified_qd)
         return;
 
     fwevt = mpi3mr_alloc_fwevt(sz);
     if (!fwevt) {
         ioc_warn(mrioc, "failed to queue TG QD reduction event\n");
         return;
     }
     *(struct mpi3mr_throttle_group_info **)fwevt->event_data = tg;
     fwevt->mrioc = mrioc;
     fwevt->event_id = MPI3MR_DRIVER_EVENT_TG_QD_REDUCTION;
     fwevt->send_ack = 0;
     fwevt->process_evt = 1;
     fwevt->evt_ctx = 0;
     fwevt->event_data_size = sz;
     tg->modified_qd = max_t(u16, (tg->fw_qd * tg->qd_reduction) / 10, 8);
 
     dprint_event_bh(mrioc, "qd reduction event queued for tg_id(%d)\n",
         tg->id);
     mpi3mr_fwevt_add_to_list(mrioc, fwevt);
 }
 
 /**
  * mpi3mr_invalidate_devhandles -Invalidate device handles
  * @mrioc: Adapter instance reference
  *
  * Invalidate the device handles in the target device structures
  * . Called post reset prior to reinitializing the controller.
  *
  * Return: Nothing.
  */
 void mpi3mr_invalidate_devhandles(struct mpi3mr_ioc *mrioc)
 {
     struct mpi3mr_tgt_dev *tgtdev;
     struct mpi3mr_stgt_priv_data *tgt_priv;
 
     list_for_each_entry(tgtdev, &mrioc->tgtdev_list, list) {
         tgtdev->dev_handle = MPI3MR_INVALID_DEV_HANDLE;
         if (tgtdev->starget && tgtdev->starget->hostdata) {
             tgt_priv = tgtdev->starget->hostdata;
             tgt_priv->dev_handle = MPI3MR_INVALID_DEV_HANDLE;
             tgt_priv->io_throttle_enabled = 0;
             tgt_priv->io_divert = 0;
             tgt_priv->throttle_group = NULL;
         }
     }
 }
 
 /**
  * mpi3mr_print_scmd - print individual SCSI command
  * @rq: Block request
  * @data: Adapter instance reference
  *
  * Print the SCSI command details if it is in LLD scope.
  *
  * Return: true always.
  */
 static bool mpi3mr_print_scmd(struct request *rq, void *data)
 {
     struct mpi3mr_ioc *mrioc = (struct mpi3mr_ioc *)data;
     struct scsi_cmnd *scmd = blk_mq_rq_to_pdu(rq);
     struct scmd_priv *priv = NULL;
 
     if (scmd) {
         priv = scsi_cmd_priv(scmd);
         if (!priv->in_lld_scope)
             goto out;
 
         ioc_info(mrioc, "%s :Host Tag = %d, qid = %d\n",
             __func__, priv->host_tag, priv->req_q_idx + 1);
         scsi_print_command(scmd);
     }
 
 out:
     return(true);
 }
 
 /**
  * mpi3mr_flush_scmd - Flush individual SCSI command
  * @rq: Block request
  * @data: Adapter instance reference
  *
  * Return the SCSI command to the upper layers if it is in LLD
  * scope.
  *
  * Return: true always.
  */
 
 static bool mpi3mr_flush_scmd(struct request *rq, void *data)
 {
     struct mpi3mr_ioc *mrioc = (struct mpi3mr_ioc *)data;
     struct scsi_cmnd *scmd = blk_mq_rq_to_pdu(rq);
     struct scmd_priv *priv = NULL;
 
     if (scmd) {
         priv = scsi_cmd_priv(scmd);
         if (!priv->in_lld_scope)
             goto out;
 
         if (priv->meta_sg_valid)
             dma_unmap_sg(&mrioc->pdev->dev, scsi_prot_sglist(scmd),
                 scsi_prot_sg_count(scmd), scmd->sc_data_direction);
         mpi3mr_clear_scmd_priv(mrioc, scmd);
         scsi_dma_unmap(scmd);
         scmd->result = DID_RESET << 16;
         scsi_print_command(scmd);
         scsi_done(scmd);
         mrioc->flush_io_count++;
     }
 
 out:
     return(true);
 }
 
 /**
  * mpi3mr_count_dev_pending - Count commands pending for a lun
  * @rq: Block request
  * @data: SCSI device reference
  *
  * This is an iterator function called for each SCSI command in
  * a host and if the command is pending in the LLD for the
  * specific device(lun) then device specific pending I/O counter
  * is updated in the device structure.
  *
  * Return: true always.
  */
 
 static bool mpi3mr_count_dev_pending(struct request *rq, void *data)
 {
     struct scsi_device *sdev = (struct scsi_device *)data;
     struct mpi3mr_sdev_priv_data *sdev_priv_data = sdev->hostdata;
     struct scsi_cmnd *scmd = blk_mq_rq_to_pdu(rq);
     struct scmd_priv *priv;
 
     if (scmd) {
         priv = scsi_cmd_priv(scmd);
         if (!priv->in_lld_scope)
             goto out;
         if (scmd->device == sdev)
             sdev_priv_data->pend_count++;
     }
 
 out:
     return true;
 }
 
 /**
  * mpi3mr_count_tgt_pending - Count commands pending for target
  * @rq: Block request
  * @data: SCSI target reference
  *
  * This is an iterator function called for each SCSI command in
  * a host and if the command is pending in the LLD for the
  * specific target then target specific pending I/O counter is
  * updated in the target structure.
  *
  * Return: true always.
  */
 
 static bool mpi3mr_count_tgt_pending(struct request *rq, void *data)
 {
     struct scsi_target *starget = (struct scsi_target *)data;
     struct mpi3mr_stgt_priv_data *stgt_priv_data = starget->hostdata;
     struct scsi_cmnd *scmd = blk_mq_rq_to_pdu(rq);
     struct scmd_priv *priv;
 
     if (scmd) {
         priv = scsi_cmd_priv(scmd);
         if (!priv->in_lld_scope)
             goto out;
         if (scmd->device && (scsi_target(scmd->device) == starget))
             stgt_priv_data->pend_count++;
     }
 
 out:
     return true;
 }
 
 /**
  * mpi3mr_flush_host_io -  Flush host I/Os
  * @mrioc: Adapter instance reference
  *
  * Flush all of the pending I/Os by calling
  * blk_mq_tagset_busy_iter() for each possible tag. This is
  * executed post controller reset
  *
  * Return: Nothing.
  */
 void mpi3mr_flush_host_io(struct mpi3mr_ioc *mrioc)
 {
     struct Scsi_Host *shost = mrioc->shost;
 
     mrioc->flush_io_count = 0;
     ioc_info(mrioc, "%s :Flushing Host I/O cmds post reset\n", __func__);
     blk_mq_tagset_busy_iter(&shost->tag_set,
         mpi3mr_flush_scmd, (void *)mrioc);
     ioc_info(mrioc, "%s :Flushed %d Host I/O cmds\n", __func__,
         mrioc->flush_io_count);
 }
 
 /**
  * mpi3mr_alloc_tgtdev - target device allocator
  *
  * Allocate target device instance and initialize the reference
  * count
  *
  * Return: target device instance.
  */
 static struct mpi3mr_tgt_dev *mpi3mr_alloc_tgtdev(void)
 {
     struct mpi3mr_tgt_dev *tgtdev;
 
     tgtdev = kzalloc(sizeof(*tgtdev), GFP_ATOMIC);
     if (!tgtdev)
         return NULL;
     kref_init(&tgtdev->ref_count);
     return tgtdev;
 }
 
 /**
  * mpi3mr_tgtdev_add_to_list -Add tgtdevice to the list
  * @mrioc: Adapter instance reference
  * @tgtdev: Target device
  *
  * Add the target device to the target device list
  *
  * Return: Nothing.
  */
 static void mpi3mr_tgtdev_add_to_list(struct mpi3mr_ioc *mrioc,
     struct mpi3mr_tgt_dev *tgtdev)
 {
     unsigned long flags;
 
     spin_lock_irqsave(&mrioc->tgtdev_lock, flags);
     mpi3mr_tgtdev_get(tgtdev);
     INIT_LIST_HEAD(&tgtdev->list);
     list_add_tail(&tgtdev->list, &mrioc->tgtdev_list);
     spin_unlock_irqrestore(&mrioc->tgtdev_lock, flags);
 }
 
 /**
  * mpi3mr_tgtdev_del_from_list -Delete tgtdevice from the list
  * @mrioc: Adapter instance reference
  * @tgtdev: Target device
  *
  * Remove the target device from the target device list
  *
  * Return: Nothing.
  */
 static void mpi3mr_tgtdev_del_from_list(struct mpi3mr_ioc *mrioc,
     struct mpi3mr_tgt_dev *tgtdev)
 {
     unsigned long flags;
 
     spin_lock_irqsave(&mrioc->tgtdev_lock, flags);
     if (!list_empty(&tgtdev->list)) {
         list_del_init(&tgtdev->list);
         mpi3mr_tgtdev_put(tgtdev);
     }
     spin_unlock_irqrestore(&mrioc->tgtdev_lock, flags);
 }
 
 /**
  * __mpi3mr_get_tgtdev_by_handle -Get tgtdev from device handle
  * @mrioc: Adapter instance reference
  * @handle: Device handle
  *
  * Accessor to retrieve target device from the device handle.
  * Non Lock version
  *
  * Return: Target device reference.
  */
 static struct mpi3mr_tgt_dev  *__mpi3mr_get_tgtdev_by_handle(
     struct mpi3mr_ioc *mrioc, u16 handle)
 {
     struct mpi3mr_tgt_dev *tgtdev;
 
     assert_spin_locked(&mrioc->tgtdev_lock);
     list_for_each_entry(tgtdev, &mrioc->tgtdev_list, list)
         if (tgtdev->dev_handle == handle)
             goto found_tgtdev;
     return NULL;
 
 found_tgtdev:
     mpi3mr_tgtdev_get(tgtdev);
     return tgtdev;
 }
 
 /**
  * mpi3mr_get_tgtdev_by_handle -Get tgtdev from device handle
  * @mrioc: Adapter instance reference
  * @handle: Device handle
  *
  * Accessor to retrieve target device from the device handle.
  * Lock version
  *
  * Return: Target device reference.
  */
 struct mpi3mr_tgt_dev *mpi3mr_get_tgtdev_by_handle(
     struct mpi3mr_ioc *mrioc, u16 handle)
 {
     struct mpi3mr_tgt_dev *tgtdev;
     unsigned long flags;
 
     spin_lock_irqsave(&mrioc->tgtdev_lock, flags);
     tgtdev = __mpi3mr_get_tgtdev_by_handle(mrioc, handle);
     spin_unlock_irqrestore(&mrioc->tgtdev_lock, flags);
     return tgtdev;
 }
 
 /**
  * __mpi3mr_get_tgtdev_by_perst_id -Get tgtdev from persist ID
  * @mrioc: Adapter instance reference
  * @persist_id: Persistent ID
  *
  * Accessor to retrieve target device from the Persistent ID.
  * Non Lock version
  *
  * Return: Target device reference.
  */
 static struct mpi3mr_tgt_dev  *__mpi3mr_get_tgtdev_by_perst_id(
     struct mpi3mr_ioc *mrioc, u16 persist_id)
 {
     struct mpi3mr_tgt_dev *tgtdev;
 
     assert_spin_locked(&mrioc->tgtdev_lock);
     list_for_each_entry(tgtdev, &mrioc->tgtdev_list, list)
         if (tgtdev->perst_id == persist_id)
             goto found_tgtdev;
     return NULL;
 
 found_tgtdev:
     mpi3mr_tgtdev_get(tgtdev);
     return tgtdev;
 }
 
 /**
  * mpi3mr_get_tgtdev_by_perst_id -Get tgtdev from persistent ID
  * @mrioc: Adapter instance reference
  * @persist_id: Persistent ID
  *
  * Accessor to retrieve target device from the Persistent ID.
  * Lock version
  *
  * Return: Target device reference.
  */
 static struct mpi3mr_tgt_dev *mpi3mr_get_tgtdev_by_perst_id(
     struct mpi3mr_ioc *mrioc, u16 persist_id)
 {
     struct mpi3mr_tgt_dev *tgtdev;
     unsigned long flags;
 
     spin_lock_irqsave(&mrioc->tgtdev_lock, flags);
     tgtdev = __mpi3mr_get_tgtdev_by_perst_id(mrioc, persist_id);
     spin_unlock_irqrestore(&mrioc->tgtdev_lock, flags);
     return tgtdev;
 }
 
 /**
  * __mpi3mr_get_tgtdev_from_tgtpriv -Get tgtdev from tgt private
  * @mrioc: Adapter instance reference
  * @tgt_priv: Target private data
  *
  * Accessor to return target device from the target private
  * data. Non Lock version
  *
  * Return: Target device reference.
  */
 static struct mpi3mr_tgt_dev  *__mpi3mr_get_tgtdev_from_tgtpriv(
     struct mpi3mr_ioc *mrioc, struct mpi3mr_stgt_priv_data *tgt_priv)
 {
     struct mpi3mr_tgt_dev *tgtdev;
 
     assert_spin_locked(&mrioc->tgtdev_lock);
     tgtdev = tgt_priv->tgt_dev;
     if (tgtdev)
         mpi3mr_tgtdev_get(tgtdev);
     return tgtdev;
 }
 
 /**
  * mpi3mr_set_io_divert_for_all_vd_in_tg -set divert for TG VDs
  * @mrioc: Adapter instance reference
  * @tg: Throttle group information pointer
  * @divert_value: 1 or 0
  *
  * Accessor to set io_divert flag for each device associated
  * with the given throttle group with the given value.
  *
  * Return: None.
  */
 static void mpi3mr_set_io_divert_for_all_vd_in_tg(struct mpi3mr_ioc *mrioc,
     struct mpi3mr_throttle_group_info *tg, u8 divert_value)
 {
     unsigned long flags;
     struct mpi3mr_tgt_dev *tgtdev;
     struct mpi3mr_stgt_priv_data *tgt_priv;
 
     spin_lock_irqsave(&mrioc->tgtdev_lock, flags);
     list_for_each_entry(tgtdev, &mrioc->tgtdev_list, list) {
         if (tgtdev->starget && tgtdev->starget->hostdata) {
             tgt_priv = tgtdev->starget->hostdata;
             if (tgt_priv->throttle_group == tg)
                 tgt_priv->io_divert = divert_value;
         }
     }
     spin_unlock_irqrestore(&mrioc->tgtdev_lock, flags);
 }
 
 /**
  * mpi3mr_print_device_event_notice - print notice related to post processing of
  *                  device event after controller reset.
  *
  * @mrioc: Adapter instance reference
  * @device_add: true for device add event and false for device removal event
  *
  * Return: None.
  */
 static void mpi3mr_print_device_event_notice(struct mpi3mr_ioc *mrioc,
     bool device_add)
 {
     ioc_notice(mrioc, "Device %s was in progress before the reset and\n",
         (device_add ? "addition" : "removal"));
     ioc_notice(mrioc, "completed after reset, verify whether the exposed devices\n");
     ioc_notice(mrioc, "are matched with attached devices for correctness\n");
 }
 
 /**
  * mpi3mr_remove_tgtdev_from_host - Remove dev from upper layers
  * @mrioc: Adapter instance reference
  * @tgtdev: Target device structure
  *
  * Checks whether the device is exposed to upper layers and if it
  * is then remove the device from upper layers by calling
  * scsi_remove_target().
  *
  * Return: 0 on success, non zero on failure.
  */
 static void mpi3mr_remove_tgtdev_from_host(struct mpi3mr_ioc *mrioc,
     struct mpi3mr_tgt_dev *tgtdev)
 {
     struct mpi3mr_stgt_priv_data *tgt_priv;
 
     ioc_info(mrioc, "%s :Removing handle(0x%04x), wwid(0x%016llx)\n",
         __func__, tgtdev->dev_handle, (unsigned long long)tgtdev->wwid);
     if (tgtdev->starget && tgtdev->starget->hostdata) {
         tgt_priv = tgtdev->starget->hostdata;
         tgt_priv->dev_handle = MPI3MR_INVALID_DEV_HANDLE;
     }
 
     if (tgtdev->starget) {
         if (mrioc->current_event)
             mrioc->current_event->pending_at_sml = 1;
         scsi_remove_target(&tgtdev->starget->dev);
         tgtdev->host_exposed = 0;
         if (mrioc->current_event) {
             mrioc->current_event->pending_at_sml = 0;
             if (mrioc->current_event->discard) {
                 mpi3mr_print_device_event_notice(mrioc, false);
                 return;
             }
         }
     }
     ioc_info(mrioc, "%s :Removed handle(0x%04x), wwid(0x%016llx)\n",
         __func__, tgtdev->dev_handle, (unsigned long long)tgtdev->wwid);
 }
 
 /**
  * mpi3mr_report_tgtdev_to_host - Expose device to upper layers
  * @mrioc: Adapter instance reference
  * @perst_id: Persistent ID of the device
  *
  * Checks whether the device can be exposed to upper layers and
  * if it is not then expose the device to upper layers by
  * calling scsi_scan_target().
  *
  * Return: 0 on success, non zero on failure.
  */
 static int mpi3mr_report_tgtdev_to_host(struct mpi3mr_ioc *mrioc,
     u16 perst_id)
 {
     int retval = 0;
     struct mpi3mr_tgt_dev *tgtdev;
 
     tgtdev = mpi3mr_get_tgtdev_by_perst_id(mrioc, perst_id);
     if (!tgtdev) {
         retval = -1;
         goto out;
     }
     if (tgtdev->is_hidden) {
         retval = -1;
         goto out;
     }
     if (!tgtdev->host_exposed && !mrioc->reset_in_progress) {
         tgtdev->host_exposed = 1;
         if (mrioc->current_event)
             mrioc->current_event->pending_at_sml = 1;
         scsi_scan_target(&mrioc->shost->shost_gendev, 0,
             tgtdev->perst_id,
             SCAN_WILD_CARD, SCSI_SCAN_INITIAL);
         if (!tgtdev->starget)
             tgtdev->host_exposed = 0;
         if (mrioc->current_event) {
             mrioc->current_event->pending_at_sml = 0;
             if (mrioc->current_event->discard) {
                 mpi3mr_print_device_event_notice(mrioc, true);
                 goto out;
             }
         }
     }
 out:
     if (tgtdev)
         mpi3mr_tgtdev_put(tgtdev);
 
     return retval;
 }
 
 /**
  * mpi3mr_change_queue_depth- Change QD callback handler
  * @sdev: SCSI device reference
  * @q_depth: Queue depth
  *
  * Validate and limit QD and call scsi_change_queue_depth.
  *
  * Return: return value of scsi_change_queue_depth
  */
 static int mpi3mr_change_queue_depth(struct scsi_device *sdev,
     int q_depth)
 {
     struct scsi_target *starget = scsi_target(sdev);
     struct Scsi_Host *shost = dev_to_shost(&starget->dev);
     int retval = 0;
 
     if (!sdev->tagged_supported)
         q_depth = 1;
     if (q_depth > shost->can_queue)
         q_depth = shost->can_queue;
     else if (!q_depth)
         q_depth = MPI3MR_DEFAULT_SDEV_QD;
     retval = scsi_change_queue_depth(sdev, q_depth);
     sdev->max_queue_depth = sdev->queue_depth;
 
     return retval;
 }
 
 /**
  * mpi3mr_update_sdev - Update SCSI device information
  * @sdev: SCSI device reference
  * @data: target device reference
  *
  * This is an iterator function called for each SCSI device in a
  * target to update the target specific information into each
  * SCSI device.
  *
  * Return: Nothing.
  */
 static void
 mpi3mr_update_sdev(struct scsi_device *sdev, void *data)
 {
     struct mpi3mr_tgt_dev *tgtdev;
 
     tgtdev = (struct mpi3mr_tgt_dev *)data;
     if (!tgtdev)
         return;
 
     mpi3mr_change_queue_depth(sdev, tgtdev->q_depth);
     switch (tgtdev->dev_type) {
     case MPI3_DEVICE_DEVFORM_PCIE:
         /*The block layer hw sector size = 512*/
         if ((tgtdev->dev_spec.pcie_inf.dev_info &
             MPI3_DEVICE0_PCIE_DEVICE_INFO_TYPE_MASK) ==
             MPI3_DEVICE0_PCIE_DEVICE_INFO_TYPE_NVME_DEVICE) {
             blk_queue_max_hw_sectors(sdev->request_queue,
                 tgtdev->dev_spec.pcie_inf.mdts / 512);
             if (tgtdev->dev_spec.pcie_inf.pgsz == 0)
                 blk_queue_virt_boundary(sdev->request_queue,
                     ((1 << MPI3MR_DEFAULT_PGSZEXP) - 1));
             else
                 blk_queue_virt_boundary(sdev->request_queue,
                     ((1 << tgtdev->dev_spec.pcie_inf.pgsz) - 1));
         }
         break;
     default:
         break;
     }
 }
 
 /**
  * mpi3mr_rfresh_tgtdevs - Refresh target device exposure
  * @mrioc: Adapter instance reference
  *
  * This is executed post controller reset to identify any
  * missing devices during reset and remove from the upper layers
  * or expose any newly detected device to the upper layers.
  *
  * Return: Nothing.
  */
 
 void mpi3mr_rfresh_tgtdevs(struct mpi3mr_ioc *mrioc)
 {
     struct mpi3mr_tgt_dev *tgtdev, *tgtdev_next;
 
     list_for_each_entry_safe(tgtdev, tgtdev_next, &mrioc->tgtdev_list,
         list) {
         if (tgtdev->dev_handle == MPI3MR_INVALID_DEV_HANDLE) {
             dprint_reset(mrioc, "removing target device with perst_id(%d)\n",
                 tgtdev->perst_id);
             if (tgtdev->host_exposed)
                 mpi3mr_remove_tgtdev_from_host(mrioc, tgtdev);
             mpi3mr_tgtdev_del_from_list(mrioc, tgtdev);
             mpi3mr_tgtdev_put(tgtdev);
         }
     }
 
     tgtdev = NULL;
     list_for_each_entry(tgtdev, &mrioc->tgtdev_list, list) {
         if ((tgtdev->dev_handle != MPI3MR_INVALID_DEV_HANDLE) &&
             !tgtdev->is_hidden && !tgtdev->host_exposed)
             mpi3mr_report_tgtdev_to_host(mrioc, tgtdev->perst_id);
     }
 }
 
 /**
  * mpi3mr_update_tgtdev - DevStatusChange evt bottomhalf
  * @mrioc: Adapter instance reference
  * @tgtdev: Target device internal structure
  * @dev_pg0: New device page0
  * @is_added: Flag to indicate the device is just added
  *
  * Update the information from the device page0 into the driver
  * cached target device structure.
  *
  * Return: Nothing.
  */
 static void mpi3mr_update_tgtdev(struct mpi3mr_ioc *mrioc,
     struct mpi3mr_tgt_dev *tgtdev, struct mpi3_device_page0 *dev_pg0,
     bool is_added)
 {
     u16 flags = 0;
     struct mpi3mr_stgt_priv_data *scsi_tgt_priv_data = NULL;
     u8 prot_mask = 0;
 
     tgtdev->perst_id = le16_to_cpu(dev_pg0->persistent_id);
     tgtdev->dev_handle = le16_to_cpu(dev_pg0->dev_handle);
     tgtdev->dev_type = dev_pg0->device_form;
     tgtdev->encl_handle = le16_to_cpu(dev_pg0->enclosure_handle);
     tgtdev->parent_handle = le16_to_cpu(dev_pg0->parent_dev_handle);
     tgtdev->slot = le16_to_cpu(dev_pg0->slot);
     tgtdev->q_depth = le16_to_cpu(dev_pg0->queue_depth);
     tgtdev->wwid = le64_to_cpu(dev_pg0->wwid);
 
     flags = le16_to_cpu(dev_pg0->flags);
     tgtdev->is_hidden = (flags & MPI3_DEVICE0_FLAGS_HIDDEN);
 
     if (is_added == true)
         tgtdev->io_throttle_enabled =
             (flags & MPI3_DEVICE0_FLAGS_IO_THROTTLING_REQUIRED) ? 1 : 0;
 
 
     if (tgtdev->starget && tgtdev->starget->hostdata) {
         scsi_tgt_priv_data = (struct mpi3mr_stgt_priv_data *)
             tgtdev->starget->hostdata;
         scsi_tgt_priv_data->perst_id = tgtdev->perst_id;
         scsi_tgt_priv_data->dev_handle = tgtdev->dev_handle;
         scsi_tgt_priv_data->dev_type = tgtdev->dev_type;
         scsi_tgt_priv_data->io_throttle_enabled =
             tgtdev->io_throttle_enabled;
     }
 
     switch (dev_pg0->access_status) {
     case MPI3_DEVICE0_ASTATUS_NO_ERRORS:
     case MPI3_DEVICE0_ASTATUS_PREPARE:
     case MPI3_DEVICE0_ASTATUS_NEEDS_INITIALIZATION:
     case MPI3_DEVICE0_ASTATUS_DEVICE_MISSING_DELAY:
         break;
     default:
         tgtdev->is_hidden = 1;
         break;
     }
 
     switch (tgtdev->dev_type) {
     case MPI3_DEVICE_DEVFORM_SAS_SATA:
     {
         struct mpi3_device0_sas_sata_format *sasinf =
             &dev_pg0->device_specific.sas_sata_format;
         u16 dev_info = le16_to_cpu(sasinf->device_info);
 
         tgtdev->dev_spec.sas_sata_inf.dev_info = dev_info;
         tgtdev->dev_spec.sas_sata_inf.sas_address =
             le64_to_cpu(sasinf->sas_address);
         if ((dev_info & MPI3_SAS_DEVICE_INFO_DEVICE_TYPE_MASK) !=
             MPI3_SAS_DEVICE_INFO_DEVICE_TYPE_END_DEVICE)
             tgtdev->is_hidden = 1;
         else if (!(dev_info & (MPI3_SAS_DEVICE_INFO_STP_SATA_TARGET |
             MPI3_SAS_DEVICE_INFO_SSP_TARGET)))
             tgtdev->is_hidden = 1;
         break;
     }
     case MPI3_DEVICE_DEVFORM_PCIE:
     {
         struct mpi3_device0_pcie_format *pcieinf =
             &dev_pg0->device_specific.pcie_format;
         u16 dev_info = le16_to_cpu(pcieinf->device_info);
 
         tgtdev->dev_spec.pcie_inf.dev_info = dev_info;
         tgtdev->dev_spec.pcie_inf.capb =
             le32_to_cpu(pcieinf->capabilities);
         tgtdev->dev_spec.pcie_inf.mdts = MPI3MR_DEFAULT_MDTS;
         /* 2^12 = 4096 */
         tgtdev->dev_spec.pcie_inf.pgsz = 12;
         if (dev_pg0->access_status == MPI3_DEVICE0_ASTATUS_NO_ERRORS) {
             tgtdev->dev_spec.pcie_inf.mdts =
                 le32_to_cpu(pcieinf->maximum_data_transfer_size);
             tgtdev->dev_spec.pcie_inf.pgsz = pcieinf->page_size;
             tgtdev->dev_spec.pcie_inf.reset_to =
                 max_t(u8, pcieinf->controller_reset_to,
                  MPI3MR_INTADMCMD_TIMEOUT);
             tgtdev->dev_spec.pcie_inf.abort_to =
                 max_t(u8, pcieinf->nvme_abort_to,
                 MPI3MR_INTADMCMD_TIMEOUT);
         }
         if (tgtdev->dev_spec.pcie_inf.mdts > (1024 * 1024))
             tgtdev->dev_spec.pcie_inf.mdts = (1024 * 1024);
         if (((dev_info & MPI3_DEVICE0_PCIE_DEVICE_INFO_TYPE_MASK) !=
             MPI3_DEVICE0_PCIE_DEVICE_INFO_TYPE_NVME_DEVICE) &&
             ((dev_info & MPI3_DEVICE0_PCIE_DEVICE_INFO_TYPE_MASK) !=
             MPI3_DEVICE0_PCIE_DEVICE_INFO_TYPE_SCSI_DEVICE))
             tgtdev->is_hidden = 1;
         if (!mrioc->shost)
             break;
         prot_mask = scsi_host_get_prot(mrioc->shost);
         if (prot_mask & SHOST_DIX_TYPE0_PROTECTION) {
             scsi_host_set_prot(mrioc->shost, prot_mask & 0x77);
             ioc_info(mrioc,
                 "%s : Disabling DIX0 prot capability\n", __func__);
             ioc_info(mrioc,
                 "because HBA does not support DIX0 operation on NVME drives\n");
         }
         break;
     }
     case MPI3_DEVICE_DEVFORM_VD:
     {
         struct mpi3_device0_vd_format *vdinf =
             &dev_pg0->device_specific.vd_format;
         struct mpi3mr_throttle_group_info *tg = NULL;
         u16 vdinf_io_throttle_group =
             le16_to_cpu(vdinf->io_throttle_group);
 
         tgtdev->dev_spec.vd_inf.state = vdinf->vd_state;
         if (vdinf->vd_state == MPI3_DEVICE0_VD_STATE_OFFLINE)
             tgtdev->is_hidden = 1;
         tgtdev->dev_spec.vd_inf.tg_id = vdinf_io_throttle_group;
         tgtdev->dev_spec.vd_inf.tg_high =
             le16_to_cpu(vdinf->io_throttle_group_high) * 2048;
         tgtdev->dev_spec.vd_inf.tg_low =
             le16_to_cpu(vdinf->io_throttle_group_low) * 2048;
         if (vdinf_io_throttle_group < mrioc->num_io_throttle_group) {
             tg = mrioc->throttle_groups + vdinf_io_throttle_group;
             tg->id = vdinf_io_throttle_group;
             tg->high = tgtdev->dev_spec.vd_inf.tg_high;
             tg->low = tgtdev->dev_spec.vd_inf.tg_low;
             tg->qd_reduction =
                 tgtdev->dev_spec.vd_inf.tg_qd_reduction;
             if (is_added == true)
                 tg->fw_qd = tgtdev->q_depth;
             tg->modified_qd = tgtdev->q_depth;
         }
         tgtdev->dev_spec.vd_inf.tg = tg;
         if (scsi_tgt_priv_data)
             scsi_tgt_priv_data->throttle_group = tg;
         break;
     }
     default:
         break;
     }
 }
 
 /**
  * mpi3mr_devstatuschg_evt_bh - DevStatusChange evt bottomhalf
  * @mrioc: Adapter instance reference
  * @fwevt: Firmware event information.
  *
  * Process Device status Change event and based on device's new
  * information, either expose the device to the upper layers, or
  * remove the device from upper layers.
  *
  * Return: Nothing.
  */
 static void mpi3mr_devstatuschg_evt_bh(struct mpi3mr_ioc *mrioc,
     struct mpi3mr_fwevt *fwevt)
 {
     u16 dev_handle = 0;
     u8 uhide = 0, delete = 0, cleanup = 0;
     struct mpi3mr_tgt_dev *tgtdev = NULL;
     struct mpi3_event_data_device_status_change *evtdata =
         (struct mpi3_event_data_device_status_change *)fwevt->event_data;
 
     dev_handle = le16_to_cpu(evtdata->dev_handle);
     ioc_info(mrioc,
         "%s :device status change: handle(0x%04x): reason code(0x%x)\n",
         __func__, dev_handle, evtdata->reason_code);
     switch (evtdata->reason_code) {
     case MPI3_EVENT_DEV_STAT_RC_HIDDEN:
         delete = 1;
         break;
     case MPI3_EVENT_DEV_STAT_RC_NOT_HIDDEN:
         uhide = 1;
         break;
     case MPI3_EVENT_DEV_STAT_RC_VD_NOT_RESPONDING:
         delete = 1;
         cleanup = 1;
         break;
     default:
         ioc_info(mrioc, "%s :Unhandled reason code(0x%x)\n", __func__,
             evtdata->reason_code);
         break;
     }
 
     tgtdev = mpi3mr_get_tgtdev_by_handle(mrioc, dev_handle);
     if (!tgtdev)
         goto out;
     if (uhide) {
         tgtdev->is_hidden = 0;
         if (!tgtdev->host_exposed)
             mpi3mr_report_tgtdev_to_host(mrioc, tgtdev->perst_id);
     }
     if (tgtdev->starget && tgtdev->starget->hostdata) {
         if (delete)
             mpi3mr_remove_tgtdev_from_host(mrioc, tgtdev);
     }
     if (cleanup) {
         mpi3mr_tgtdev_del_from_list(mrioc, tgtdev);
         mpi3mr_tgtdev_put(tgtdev);
     }
 
 out:
     if (tgtdev)
         mpi3mr_tgtdev_put(tgtdev);
 }
 
 /**
  * mpi3mr_devinfochg_evt_bh - DeviceInfoChange evt bottomhalf
  * @mrioc: Adapter instance reference
  * @dev_pg0: New device page0
  *
  * Process Device Info Change event and based on device's new
  * information, either expose the device to the upper layers, or
  * remove the device from upper layers or update the details of
  * the device.
  *
  * Return: Nothing.
  */
 static void mpi3mr_devinfochg_evt_bh(struct mpi3mr_ioc *mrioc,
     struct mpi3_device_page0 *dev_pg0)
 {
     struct mpi3mr_tgt_dev *tgtdev = NULL;
     u16 dev_handle = 0, perst_id = 0;
 
     perst_id = le16_to_cpu(dev_pg0->persistent_id);
     dev_handle = le16_to_cpu(dev_pg0->dev_handle);
     ioc_info(mrioc,
         "%s :Device info change: handle(0x%04x): persist_id(0x%x)\n",
         __func__, dev_handle, perst_id);
     tgtdev = mpi3mr_get_tgtdev_by_handle(mrioc, dev_handle);
     if (!tgtdev)
         goto out;
     mpi3mr_update_tgtdev(mrioc, tgtdev, dev_pg0, false);
     if (!tgtdev->is_hidden && !tgtdev->host_exposed)
         mpi3mr_report_tgtdev_to_host(mrioc, perst_id);
     if (tgtdev->is_hidden && tgtdev->host_exposed)
         mpi3mr_remove_tgtdev_from_host(mrioc, tgtdev);
     if (!tgtdev->is_hidden && tgtdev->host_exposed && tgtdev->starget)
         starget_for_each_device(tgtdev->starget, (void *)tgtdev,
             mpi3mr_update_sdev);
 out:
     if (tgtdev)
         mpi3mr_tgtdev_put(tgtdev);
 }
 
 /**
  * mpi3mr_sastopochg_evt_debug - SASTopoChange details
  * @mrioc: Adapter instance reference
  * @event_data: SAS topology change list event data
  *
  * Prints information about the SAS topology change event.
  *
  * Return: Nothing.
  */
 static void
 mpi3mr_sastopochg_evt_debug(struct mpi3mr_ioc *mrioc,
     struct mpi3_event_data_sas_topology_change_list *event_data)
 {
     int i;
     u16 handle;
     u8 reason_code, phy_number;
     char *status_str = NULL;
     u8 link_rate, prev_link_rate;
 
     switch (event_data->exp_status) {
     case MPI3_EVENT_SAS_TOPO_ES_NOT_RESPONDING:
         status_str = "remove";
         break;
     case MPI3_EVENT_SAS_TOPO_ES_RESPONDING:
         status_str =  "responding";
         break;
     case MPI3_EVENT_SAS_TOPO_ES_DELAY_NOT_RESPONDING:
         status_str = "remove delay";
         break;
     case MPI3_EVENT_SAS_TOPO_ES_NO_EXPANDER:
         status_str = "direct attached";
         break;
     default:
         status_str = "unknown status";
         break;
     }
     ioc_info(mrioc, "%s :sas topology change: (%s)\n",
         __func__, status_str);
     ioc_info(mrioc,
         "%s :\texpander_handle(0x%04x), enclosure_handle(0x%04x) start_phy(%02d), num_entries(%d)\n",
         __func__, le16_to_cpu(event_data->expander_dev_handle),
         le16_to_cpu(event_data->enclosure_handle),
         event_data->start_phy_num, event_data->num_entries);
     for (i = 0; i < event_data->num_entries; i++) {
         handle = le16_to_cpu(event_data->phy_entry[i].attached_dev_handle);
         if (!handle)
             continue;
         phy_number = event_data->start_phy_num + i;
         reason_code = event_data->phy_entry[i].status &
             MPI3_EVENT_SAS_TOPO_PHY_RC_MASK;
         switch (reason_code) {
         case MPI3_EVENT_SAS_TOPO_PHY_RC_TARG_NOT_RESPONDING:
             status_str = "target remove";
             break;
         case MPI3_EVENT_SAS_TOPO_PHY_RC_DELAY_NOT_RESPONDING:
             status_str = "delay target remove";
             break;
         case MPI3_EVENT_SAS_TOPO_PHY_RC_PHY_CHANGED:
             status_str = "link status change";
             break;
         case MPI3_EVENT_SAS_TOPO_PHY_RC_NO_CHANGE:
             status_str = "link status no change";
             break;
         case MPI3_EVENT_SAS_TOPO_PHY_RC_RESPONDING:
             status_str = "target responding";
             break;
         default:
             status_str = "unknown";
             break;
         }
         link_rate = event_data->phy_entry[i].link_rate >> 4;
         prev_link_rate = event_data->phy_entry[i].link_rate & 0xF;
         ioc_info(mrioc,
             "%s :\tphy(%02d), attached_handle(0x%04x): %s: link rate: new(0x%02x), old(0x%02x)\n",
             __func__, phy_number, handle, status_str, link_rate,
             prev_link_rate);
     }
 }
 
 /**
  * mpi3mr_sastopochg_evt_bh - SASTopologyChange evt bottomhalf
  * @mrioc: Adapter instance reference
  * @fwevt: Firmware event reference
  *
  * Prints information about the SAS topology change event and
  * for "not responding" event code, removes the device from the
  * upper layers.
  *
  * Return: Nothing.
  */
 static void mpi3mr_sastopochg_evt_bh(struct mpi3mr_ioc *mrioc,
     struct mpi3mr_fwevt *fwevt)
 {
     struct mpi3_event_data_sas_topology_change_list *event_data =
         (struct mpi3_event_data_sas_topology_change_list *)fwevt->event_data;
     int i;
     u16 handle;
     u8 reason_code;
     struct mpi3mr_tgt_dev *tgtdev = NULL;
 
     mpi3mr_sastopochg_evt_debug(mrioc, event_data);
 
     for (i = 0; i < event_data->num_entries; i++) {
         if (fwevt->discard)
             return;
         handle = le16_to_cpu(event_data->phy_entry[i].attached_dev_handle);
         if (!handle)
             continue;
         tgtdev = mpi3mr_get_tgtdev_by_handle(mrioc, handle);
         if (!tgtdev)
             continue;
 
         reason_code = event_data->phy_entry[i].status &
             MPI3_EVENT_SAS_TOPO_PHY_RC_MASK;
 
         switch (reason_code) {
         case MPI3_EVENT_SAS_TOPO_PHY_RC_TARG_NOT_RESPONDING:
             if (tgtdev->host_exposed)
                 mpi3mr_remove_tgtdev_from_host(mrioc, tgtdev);
             mpi3mr_tgtdev_del_from_list(mrioc, tgtdev);
             mpi3mr_tgtdev_put(tgtdev);
             break;
         default:
             break;
         }
         if (tgtdev)
             mpi3mr_tgtdev_put(tgtdev);
     }
 }
 
 /**
  * mpi3mr_pcietopochg_evt_debug - PCIeTopoChange details
  * @mrioc: Adapter instance reference
  * @event_data: PCIe topology change list event data
  *
  * Prints information about the PCIe topology change event.
  *
  * Return: Nothing.
  */
 static void
 mpi3mr_pcietopochg_evt_debug(struct mpi3mr_ioc *mrioc,
     struct mpi3_event_data_pcie_topology_change_list *event_data)
 {
     int i;
     u16 handle;
     u16 reason_code;
     u8 port_number;
     char *status_str = NULL;
     u8 link_rate, prev_link_rate;
 
     switch (event_data->switch_status) {
     case MPI3_EVENT_PCIE_TOPO_SS_NOT_RESPONDING:
         status_str = "remove";
         break;
     case MPI3_EVENT_PCIE_TOPO_SS_RESPONDING:
         status_str =  "responding";
         break;
     case MPI3_EVENT_PCIE_TOPO_SS_DELAY_NOT_RESPONDING:
         status_str = "remove delay";
         break;
     case MPI3_EVENT_PCIE_TOPO_SS_NO_PCIE_SWITCH:
         status_str = "direct attached";
         break;
     default:
         status_str = "unknown status";
         break;
     }
     ioc_info(mrioc, "%s :pcie topology change: (%s)\n",
         __func__, status_str);
     ioc_info(mrioc,
         "%s :\tswitch_handle(0x%04x), enclosure_handle(0x%04x) start_port(%02d), num_entries(%d)\n",
         __func__, le16_to_cpu(event_data->switch_dev_handle),
         le16_to_cpu(event_data->enclosure_handle),
         event_data->start_port_num, event_data->num_entries);
     for (i = 0; i < event_data->num_entries; i++) {
         handle =
             le16_to_cpu(event_data->port_entry[i].attached_dev_handle);
         if (!handle)
             continue;
         port_number = event_data->start_port_num + i;
         reason_code = event_data->port_entry[i].port_status;
         switch (reason_code) {
         case MPI3_EVENT_PCIE_TOPO_PS_NOT_RESPONDING:
             status_str = "target remove";
             break;
         case MPI3_EVENT_PCIE_TOPO_PS_DELAY_NOT_RESPONDING:
             status_str = "delay target remove";
             break;
         case MPI3_EVENT_PCIE_TOPO_PS_PORT_CHANGED:
             status_str = "link status change";
             break;
         case MPI3_EVENT_PCIE_TOPO_PS_NO_CHANGE:
             status_str = "link status no change";
             break;
         case MPI3_EVENT_PCIE_TOPO_PS_RESPONDING:
             status_str = "target responding";
             break;
         default:
             status_str = "unknown";
             break;
         }
         link_rate = event_data->port_entry[i].current_port_info &
             MPI3_EVENT_PCIE_TOPO_PI_RATE_MASK;
         prev_link_rate = event_data->port_entry[i].previous_port_info &
             MPI3_EVENT_PCIE_TOPO_PI_RATE_MASK;
         ioc_info(mrioc,
             "%s :\tport(%02d), attached_handle(0x%04x): %s: link rate: new(0x%02x), old(0x%02x)\n",
             __func__, port_number, handle, status_str, link_rate,
             prev_link_rate);
     }
 }
 
 /**
  * mpi3mr_pcietopochg_evt_bh - PCIeTopologyChange evt bottomhalf
  * @mrioc: Adapter instance reference
  * @fwevt: Firmware event reference
  *
  * Prints information about the PCIe topology change event and
  * for "not responding" event code, removes the device from the
  * upper layers.
  *
  * Return: Nothing.
  */
 static void mpi3mr_pcietopochg_evt_bh(struct mpi3mr_ioc *mrioc,
     struct mpi3mr_fwevt *fwevt)
 {
     struct mpi3_event_data_pcie_topology_change_list *event_data =
         (struct mpi3_event_data_pcie_topology_change_list *)fwevt->event_data;
     int i;
     u16 handle;
     u8 reason_code;
     struct mpi3mr_tgt_dev *tgtdev = NULL;
 
     mpi3mr_pcietopochg_evt_debug(mrioc, event_data);
 
     for (i = 0; i < event_data->num_entries; i++) {
         if (fwevt->discard)
             return;
         handle =
             le16_to_cpu(event_data->port_entry[i].attached_dev_handle);
         if (!handle)
             continue;
         tgtdev = mpi3mr_get_tgtdev_by_handle(mrioc, handle);
         if (!tgtdev)
             continue;
 
         reason_code = event_data->port_entry[i].port_status;
 
         switch (reason_code) {
         case MPI3_EVENT_PCIE_TOPO_PS_NOT_RESPONDING:
             if (tgtdev->host_exposed)
                 mpi3mr_remove_tgtdev_from_host(mrioc, tgtdev);
             mpi3mr_tgtdev_del_from_list(mrioc, tgtdev);
             mpi3mr_tgtdev_put(tgtdev);
             break;
         default:
             break;
         }
         if (tgtdev)
             mpi3mr_tgtdev_put(tgtdev);
     }
 }
 
 /**
  * mpi3mr_logdata_evt_bh -  Log data event bottomhalf
  * @mrioc: Adapter instance reference
  * @fwevt: Firmware event reference
  *
  * Extracts the event data and calls application interfacing
  * function to process the event further.
  *
  * Return: Nothing.
  */
 static void mpi3mr_logdata_evt_bh(struct mpi3mr_ioc *mrioc,
     struct mpi3mr_fwevt *fwevt)
 {
     mpi3mr_app_save_logdata(mrioc, fwevt->event_data,
         fwevt->event_data_size);
 }
 
 /**
  * mpi3mr_update_sdev_qd - Update SCSI device queue depath
  * @sdev: SCSI device reference
  * @data: Queue depth reference
  *
  * This is an iterator function called for each SCSI device in a
  * target to update the QD of each SCSI device.
  *
  * Return: Nothing.
  */
 static void mpi3mr_update_sdev_qd(struct scsi_device *sdev, void *data)
 {
     u16 *q_depth = (u16 *)data;
 
     scsi_change_queue_depth(sdev, (int)*q_depth);
     sdev->max_queue_depth = sdev->queue_depth;
 }
 
 /**
  * mpi3mr_set_qd_for_all_vd_in_tg -set QD for TG VDs
  * @mrioc: Adapter instance reference
  * @tg: Throttle group information pointer
  *
  * Accessor to reduce QD for each device associated with the
  * given throttle group.
  *
  * Return: None.
  */
 static void mpi3mr_set_qd_for_all_vd_in_tg(struct mpi3mr_ioc *mrioc,
     struct mpi3mr_throttle_group_info *tg)
 {
     unsigned long flags;
     struct mpi3mr_tgt_dev *tgtdev;
     struct mpi3mr_stgt_priv_data *tgt_priv;
 
 
     spin_lock_irqsave(&mrioc->tgtdev_lock, flags);
     list_for_each_entry(tgtdev, &mrioc->tgtdev_list, list) {
         if (tgtdev->starget && tgtdev->starget->hostdata) {
             tgt_priv = tgtdev->starget->hostdata;
             if (tgt_priv->throttle_group == tg) {
                 dprint_event_bh(mrioc,
                     "updating qd due to throttling for persist_id(%d) original_qd(%d), reduced_qd (%d)\n",
                     tgt_priv->perst_id, tgtdev->q_depth,
                     tg->modified_qd);
                 starget_for_each_device(tgtdev->starget,
                     (void *)&tg->modified_qd,
                     mpi3mr_update_sdev_qd);
             }
         }
     }
     spin_unlock_irqrestore(&mrioc->tgtdev_lock, flags);
 }
 
 /**
  * mpi3mr_fwevt_bh - Firmware event bottomhalf handler
  * @mrioc: Adapter instance reference
  * @fwevt: Firmware event reference
  *
  * Identifies the firmware event and calls corresponding bottomg
  * half handler and sends event acknowledgment if required.
  *
  * Return: Nothing.
  */
 static void mpi3mr_fwevt_bh(struct mpi3mr_ioc *mrioc,
     struct mpi3mr_fwevt *fwevt)
 {
     mpi3mr_fwevt_del_from_list(mrioc, fwevt);
     mrioc->current_event = fwevt;
 
     if (mrioc->stop_drv_processing)
         goto out;
 
     if (!fwevt->process_evt)
         goto evt_ack;
 
     switch (fwevt->event_id) {
     case MPI3_EVENT_DEVICE_ADDED:
     {
         struct mpi3_device_page0 *dev_pg0 =
             (struct mpi3_device_page0 *)fwevt->event_data;
         mpi3mr_report_tgtdev_to_host(mrioc,
             le16_to_cpu(dev_pg0->persistent_id));
         break;
     }
     case MPI3_EVENT_DEVICE_INFO_CHANGED:
     {
         mpi3mr_devinfochg_evt_bh(mrioc,
             (struct mpi3_device_page0 *)fwevt->event_data);
         break;
     }
     case MPI3_EVENT_DEVICE_STATUS_CHANGE:
     {
         mpi3mr_devstatuschg_evt_bh(mrioc, fwevt);
         break;
     }
     case MPI3_EVENT_SAS_TOPOLOGY_CHANGE_LIST:
     {
         mpi3mr_sastopochg_evt_bh(mrioc, fwevt);
         break;
     }
     case MPI3_EVENT_PCIE_TOPOLOGY_CHANGE_LIST:
     {
         mpi3mr_pcietopochg_evt_bh(mrioc, fwevt);
         break;
     }
     case MPI3_EVENT_LOG_DATA:
     {
         mpi3mr_logdata_evt_bh(mrioc, fwevt);
         break;
     }
     case MPI3MR_DRIVER_EVENT_TG_QD_REDUCTION:
     {
         struct mpi3mr_throttle_group_info *tg;
 
         tg = *(struct mpi3mr_throttle_group_info **)fwevt->event_data;
         dprint_event_bh(mrioc,
             "qd reduction event processed for tg_id(%d) reduction_needed(%d)\n",
             tg->id, tg->need_qd_reduction);
         if (tg->need_qd_reduction) {
             mpi3mr_set_qd_for_all_vd_in_tg(mrioc, tg);
             tg->need_qd_reduction = 0;
         }
         break;
     }
     default:
         break;
     }
 
 evt_ack:
     if (fwevt->send_ack)
         mpi3mr_process_event_ack(mrioc, fwevt->event_id,
             fwevt->evt_ctx);
 out:
     /* Put fwevt reference count to neutralize kref_init increment */
     mpi3mr_fwevt_put(fwevt);
     mrioc->current_event = NULL;
 }
 
 /**
  * mpi3mr_fwevt_worker - Firmware event worker
  * @work: Work struct containing firmware event
  *
  * Extracts the firmware event and calls mpi3mr_fwevt_bh.
  *
  * Return: Nothing.
  */
 static void mpi3mr_fwevt_worker(struct work_struct *work)
 {
     struct mpi3mr_fwevt *fwevt = container_of(work, struct mpi3mr_fwevt,
         work);
     mpi3mr_fwevt_bh(fwevt->mrioc, fwevt);
     /*
      * Put fwevt reference count after
      * dequeuing it from worker queue
      */
     mpi3mr_fwevt_put(fwevt);
 }
 
 /**
  * mpi3mr_create_tgtdev - Create and add a target device
  * @mrioc: Adapter instance reference
  * @dev_pg0: Device Page 0 data
  *
  * If the device specified by the device page 0 data is not
  * present in the driver's internal list, allocate the memory
  * for the device, populate the data and add to the list, else
  * update the device data.  The key is persistent ID.
  *
  * Return: 0 on success, -ENOMEM on memory allocation failure
  */
 static int mpi3mr_create_tgtdev(struct mpi3mr_ioc *mrioc,
     struct mpi3_device_page0 *dev_pg0)
 {
     int retval = 0;
     struct mpi3mr_tgt_dev *tgtdev = NULL;
     u16 perst_id = 0;
 
     perst_id = le16_to_cpu(dev_pg0->persistent_id);
     tgtdev = mpi3mr_get_tgtdev_by_perst_id(mrioc, perst_id);
     if (tgtdev) {
         mpi3mr_update_tgtdev(mrioc, tgtdev, dev_pg0, true);
         mpi3mr_tgtdev_put(tgtdev);
     } else {
         tgtdev = mpi3mr_alloc_tgtdev();
         if (!tgtdev)
             return -ENOMEM;
         mpi3mr_update_tgtdev(mrioc, tgtdev, dev_pg0, true);
         mpi3mr_tgtdev_add_to_list(mrioc, tgtdev);
     }
 
     return retval;
 }
 
 /**
  * mpi3mr_flush_delayed_cmd_lists - Flush pending commands
  * @mrioc: Adapter instance reference
  *
  * Flush pending commands in the delayed lists due to a
  * controller reset or driver removal as a cleanup.
  *
  * Return: Nothing
  */
 void mpi3mr_flush_delayed_cmd_lists(struct mpi3mr_ioc *mrioc)
 {
     struct delayed_dev_rmhs_node *_rmhs_node;
     struct delayed_evt_ack_node *_evtack_node;
 
     dprint_reset(mrioc, "flushing delayed dev_remove_hs commands\n");
     while (!list_empty(&mrioc->delayed_rmhs_list)) {
         _rmhs_node = list_entry(mrioc->delayed_rmhs_list.next,
             struct delayed_dev_rmhs_node, list);
         list_del(&_rmhs_node->list);
         kfree(_rmhs_node);
     }
     dprint_reset(mrioc, "flushing delayed event ack commands\n");
     while (!list_empty(&mrioc->delayed_evtack_cmds_list)) {
         _evtack_node = list_entry(mrioc->delayed_evtack_cmds_list.next,
             struct delayed_evt_ack_node, list);
         list_del(&_evtack_node->list);
         kfree(_evtack_node);
     }
 }
 
 /**
  * mpi3mr_dev_rmhs_complete_iou - Device removal IOUC completion
  * @mrioc: Adapter instance reference
  * @drv_cmd: Internal command tracker
  *
  * Issues a target reset TM to the firmware from the device
  * removal TM pend list or retry the removal handshake sequence
  * based on the IOU control request IOC status.
  *
  * Return: Nothing
  */
 static void mpi3mr_dev_rmhs_complete_iou(struct mpi3mr_ioc *mrioc,
     struct mpi3mr_drv_cmd *drv_cmd)
 {
     u16 cmd_idx = drv_cmd->host_tag - MPI3MR_HOSTTAG_DEVRMCMD_MIN;
     struct delayed_dev_rmhs_node *delayed_dev_rmhs = NULL;
 
     if (drv_cmd->state & MPI3MR_CMD_RESET)
         goto clear_drv_cmd;
 
     ioc_info(mrioc,
         "%s :dev_rmhs_iouctrl_complete:handle(0x%04x), ioc_status(0x%04x), loginfo(0x%08x)\n",
         __func__, drv_cmd->dev_handle, drv_cmd->ioc_status,
         drv_cmd->ioc_loginfo);
     if (drv_cmd->ioc_status != MPI3_IOCSTATUS_SUCCESS) {
         if (drv_cmd->retry_count < MPI3MR_DEV_RMHS_RETRY_COUNT) {
             drv_cmd->retry_count++;
             ioc_info(mrioc,
                 "%s :dev_rmhs_iouctrl_complete: handle(0x%04x)retrying handshake retry=%d\n",
                 __func__, drv_cmd->dev_handle,
                 drv_cmd->retry_count);
             mpi3mr_dev_rmhs_send_tm(mrioc, drv_cmd->dev_handle,
                 drv_cmd, drv_cmd->iou_rc);
             return;
         }
         ioc_err(mrioc,
             "%s :dev removal handshake failed after all retries: handle(0x%04x)\n",
             __func__, drv_cmd->dev_handle);
     } else {
         ioc_info(mrioc,
             "%s :dev removal handshake completed successfully: handle(0x%04x)\n",
             __func__, drv_cmd->dev_handle);
         clear_bit(drv_cmd->dev_handle, mrioc->removepend_bitmap);
     }
 
     if (!list_empty(&mrioc->delayed_rmhs_list)) {
         delayed_dev_rmhs = list_entry(mrioc->delayed_rmhs_list.next,
             struct delayed_dev_rmhs_node, list);
         drv_cmd->dev_handle = delayed_dev_rmhs->handle;
         drv_cmd->retry_count = 0;
         drv_cmd->iou_rc = delayed_dev_rmhs->iou_rc;
         ioc_info(mrioc,
             "%s :dev_rmhs_iouctrl_complete: processing delayed TM: handle(0x%04x)\n",
             __func__, drv_cmd->dev_handle);
         mpi3mr_dev_rmhs_send_tm(mrioc, drv_cmd->dev_handle, drv_cmd,
             drv_cmd->iou_rc);
         list_del(&delayed_dev_rmhs->list);
         kfree(delayed_dev_rmhs);
         return;
     }
 
 clear_drv_cmd:
     drv_cmd->state = MPI3MR_CMD_NOTUSED;
     drv_cmd->callback = NULL;
     drv_cmd->retry_count = 0;
     drv_cmd->dev_handle = MPI3MR_INVALID_DEV_HANDLE;
     clear_bit(cmd_idx, mrioc->devrem_bitmap);
 }
 
 /**
  * mpi3mr_dev_rmhs_complete_tm - Device removal TM completion
  * @mrioc: Adapter instance reference
  * @drv_cmd: Internal command tracker
  *
  * Issues a target reset TM to the firmware from the device
  * removal TM pend list or issue IO unit control request as
  * part of device removal or hidden acknowledgment handshake.
  *
  * Return: Nothing
  */
 static void mpi3mr_dev_rmhs_complete_tm(struct mpi3mr_ioc *mrioc,
     struct mpi3mr_drv_cmd *drv_cmd)
 {
     struct mpi3_iounit_control_request iou_ctrl;
     u16 cmd_idx = drv_cmd->host_tag - MPI3MR_HOSTTAG_DEVRMCMD_MIN;
     struct mpi3_scsi_task_mgmt_reply *tm_reply = NULL;
     int retval;
 
     if (drv_cmd->state & MPI3MR_CMD_RESET)
         goto clear_drv_cmd;
 
     if (drv_cmd->state & MPI3MR_CMD_REPLY_VALID)
         tm_reply = (struct mpi3_scsi_task_mgmt_reply *)drv_cmd->reply;
 
     if (tm_reply)
         pr_info(IOCNAME
             "dev_rmhs_tr_complete:handle(0x%04x), ioc_status(0x%04x), loginfo(0x%08x), term_count(%d)\n",
             mrioc->name, drv_cmd->dev_handle, drv_cmd->ioc_status,
             drv_cmd->ioc_loginfo,
             le32_to_cpu(tm_reply->termination_count));
 
     pr_info(IOCNAME "Issuing IOU CTL: handle(0x%04x) dev_rmhs idx(%d)\n",
         mrioc->name, drv_cmd->dev_handle, cmd_idx);
 
     memset(&iou_ctrl, 0, sizeof(iou_ctrl));
 
     drv_cmd->state = MPI3MR_CMD_PENDING;
     drv_cmd->is_waiting = 0;
     drv_cmd->callback = mpi3mr_dev_rmhs_complete_iou;
     iou_ctrl.operation = drv_cmd->iou_rc;
     iou_ctrl.param16[0] = cpu_to_le16(drv_cmd->dev_handle);
     iou_ctrl.host_tag = cpu_to_le16(drv_cmd->host_tag);
     iou_ctrl.function = MPI3_FUNCTION_IO_UNIT_CONTROL;
 
     retval = mpi3mr_admin_request_post(mrioc, &iou_ctrl, sizeof(iou_ctrl),
         1);
     if (retval) {
         pr_err(IOCNAME "Issue DevRmHsTMIOUCTL: Admin post failed\n",
             mrioc->name);
         goto clear_drv_cmd;
     }
 
     return;
 clear_drv_cmd:
     drv_cmd->state = MPI3MR_CMD_NOTUSED;
     drv_cmd->callback = NULL;
     drv_cmd->dev_handle = MPI3MR_INVALID_DEV_HANDLE;
     drv_cmd->retry_count = 0;
     clear_bit(cmd_idx, mrioc->devrem_bitmap);
 }
 
 /**
  * mpi3mr_dev_rmhs_send_tm - Issue TM for device removal
  * @mrioc: Adapter instance reference
  * @handle: Device handle
  * @cmdparam: Internal command tracker
  * @iou_rc: IO unit reason code
  *
  * Issues a target reset TM to the firmware or add it to a pend
  * list as part of device removal or hidden acknowledgment
  * handshake.
  *
  * Return: Nothing
  */
 static void mpi3mr_dev_rmhs_send_tm(struct mpi3mr_ioc *mrioc, u16 handle,
     struct mpi3mr_drv_cmd *cmdparam, u8 iou_rc)
 {
     struct mpi3_scsi_task_mgmt_request tm_req;
     int retval = 0;
     u16 cmd_idx = MPI3MR_NUM_DEVRMCMD;
     u8 retrycount = 5;
     struct mpi3mr_drv_cmd *drv_cmd = cmdparam;
     struct delayed_dev_rmhs_node *delayed_dev_rmhs = NULL;
 
     if (drv_cmd)
         goto issue_cmd;
     do {
         cmd_idx = find_first_zero_bit(mrioc->devrem_bitmap,
             MPI3MR_NUM_DEVRMCMD);
         if (cmd_idx < MPI3MR_NUM_DEVRMCMD) {
             if (!test_and_set_bit(cmd_idx, mrioc->devrem_bitmap))
                 break;
             cmd_idx = MPI3MR_NUM_DEVRMCMD;
         }
     } while (retrycount--);
 
     if (cmd_idx >= MPI3MR_NUM_DEVRMCMD) {
         delayed_dev_rmhs = kzalloc(sizeof(*delayed_dev_rmhs),
             GFP_ATOMIC);
         if (!delayed_dev_rmhs)
             return;
         INIT_LIST_HEAD(&delayed_dev_rmhs->list);
         delayed_dev_rmhs->handle = handle;
         delayed_dev_rmhs->iou_rc = iou_rc;
         list_add_tail(&delayed_dev_rmhs->list,
             &mrioc->delayed_rmhs_list);
         ioc_info(mrioc, "%s :DevRmHs: tr:handle(0x%04x) is postponed\n",
             __func__, handle);
         return;
     }
     drv_cmd = &mrioc->dev_rmhs_cmds[cmd_idx];
 
 issue_cmd:
     cmd_idx = drv_cmd->host_tag - MPI3MR_HOSTTAG_DEVRMCMD_MIN;
     ioc_info(mrioc,
         "%s :Issuing TR TM: for devhandle 0x%04x with dev_rmhs %d\n",
         __func__, handle, cmd_idx);
 
     memset(&tm_req, 0, sizeof(tm_req));
     if (drv_cmd->state & MPI3MR_CMD_PENDING) {
         ioc_err(mrioc, "%s :Issue TM: Command is in use\n", __func__);
         goto out;
     }
     drv_cmd->state = MPI3MR_CMD_PENDING;
     drv_cmd->is_waiting = 0;
     drv_cmd->callback = mpi3mr_dev_rmhs_complete_tm;
     drv_cmd->dev_handle = handle;
     drv_cmd->iou_rc = iou_rc;
     tm_req.dev_handle = cpu_to_le16(handle);
     tm_req.task_type = MPI3_SCSITASKMGMT_TASKTYPE_TARGET_RESET;
     tm_req.host_tag = cpu_to_le16(drv_cmd->host_tag);
     tm_req.task_host_tag = cpu_to_le16(MPI3MR_HOSTTAG_INVALID);
     tm_req.function = MPI3_FUNCTION_SCSI_TASK_MGMT;
 
     set_bit(handle, mrioc->removepend_bitmap);
     retval = mpi3mr_admin_request_post(mrioc, &tm_req, sizeof(tm_req), 1);
     if (retval) {
         ioc_err(mrioc, "%s :Issue DevRmHsTM: Admin Post failed\n",
             __func__);
         goto out_failed;
     }
 out:
     return;
 out_failed:
     drv_cmd->state = MPI3MR_CMD_NOTUSED;
     drv_cmd->callback = NULL;
     drv_cmd->dev_handle = MPI3MR_INVALID_DEV_HANDLE;
     drv_cmd->retry_count = 0;
     clear_bit(cmd_idx, mrioc->devrem_bitmap);
 }
 
 /**
  * mpi3mr_complete_evt_ack - event ack request completion
  * @mrioc: Adapter instance reference
  * @drv_cmd: Internal command tracker
  *
  * This is the completion handler for non blocking event
  * acknowledgment sent to the firmware and this will issue any
  * pending event acknowledgment request.
  *
  * Return: Nothing
  */
 static void mpi3mr_complete_evt_ack(struct mpi3mr_ioc *mrioc,
     struct mpi3mr_drv_cmd *drv_cmd)
 {
     u16 cmd_idx = drv_cmd->host_tag - MPI3MR_HOSTTAG_EVTACKCMD_MIN;
     struct delayed_evt_ack_node *delayed_evtack = NULL;
 
     if (drv_cmd->state & MPI3MR_CMD_RESET)
         goto clear_drv_cmd;
 
     if (drv_cmd->ioc_status != MPI3_IOCSTATUS_SUCCESS) {
         dprint_event_th(mrioc,
             "immediate event ack failed with ioc_status(0x%04x) log_info(0x%08x)\n",
             (drv_cmd->ioc_status & MPI3_IOCSTATUS_STATUS_MASK),
             drv_cmd->ioc_loginfo);
     }
 
     if (!list_empty(&mrioc->delayed_evtack_cmds_list)) {
         delayed_evtack =
             list_entry(mrioc->delayed_evtack_cmds_list.next,
                 struct delayed_evt_ack_node, list);
         mpi3mr_send_event_ack(mrioc, delayed_evtack->event, drv_cmd,
             delayed_evtack->event_ctx);
         list_del(&delayed_evtack->list);
         kfree(delayed_evtack);
         return;
     }
 clear_drv_cmd:
     drv_cmd->state = MPI3MR_CMD_NOTUSED;
     drv_cmd->callback = NULL;
     clear_bit(cmd_idx, mrioc->evtack_cmds_bitmap);
 }
 
 /**
  * mpi3mr_send_event_ack - Issue event acknwoledgment request
  * @mrioc: Adapter instance reference
  * @event: MPI3 event id
  * @cmdparam: Internal command tracker
  * @event_ctx: event context
  *
  * Issues event acknowledgment request to the firmware if there
  * is a free command to send the event ack else it to a pend
  * list so that it will be processed on a completion of a prior
  * event acknowledgment .
  *
  * Return: Nothing
  */
 static void mpi3mr_send_event_ack(struct mpi3mr_ioc *mrioc, u8 event,
     struct mpi3mr_drv_cmd *cmdparam, u32 event_ctx)
 {
     struct mpi3_event_ack_request evtack_req;
     int retval = 0;
     u8 retrycount = 5;
     u16 cmd_idx = MPI3MR_NUM_EVTACKCMD;
     struct mpi3mr_drv_cmd *drv_cmd = cmdparam;
     struct delayed_evt_ack_node *delayed_evtack = NULL;
 
     if (drv_cmd) {
         dprint_event_th(mrioc,
             "sending delayed event ack in the top half for event(0x%02x), event_ctx(0x%08x)\n",
             event, event_ctx);
         goto issue_cmd;
     }
     dprint_event_th(mrioc,
         "sending event ack in the top half for event(0x%02x), event_ctx(0x%08x)\n",
         event, event_ctx);
     do {
         cmd_idx = find_first_zero_bit(mrioc->evtack_cmds_bitmap,
             MPI3MR_NUM_EVTACKCMD);
         if (cmd_idx < MPI3MR_NUM_EVTACKCMD) {
             if (!test_and_set_bit(cmd_idx,
                 mrioc->evtack_cmds_bitmap))
                 break;
             cmd_idx = MPI3MR_NUM_EVTACKCMD;
         }
     } while (retrycount--);
 
     if (cmd_idx >= MPI3MR_NUM_EVTACKCMD) {
         delayed_evtack = kzalloc(sizeof(*delayed_evtack),
             GFP_ATOMIC);
         if (!delayed_evtack)
             return;
         INIT_LIST_HEAD(&delayed_evtack->list);
         delayed_evtack->event = event;
         delayed_evtack->event_ctx = event_ctx;
         list_add_tail(&delayed_evtack->list,
             &mrioc->delayed_evtack_cmds_list);
         dprint_event_th(mrioc,
             "event ack in the top half for event(0x%02x), event_ctx(0x%08x) is postponed\n",
             event, event_ctx);
         return;
     }
     drv_cmd = &mrioc->evtack_cmds[cmd_idx];
 
 issue_cmd:
     cmd_idx = drv_cmd->host_tag - MPI3MR_HOSTTAG_EVTACKCMD_MIN;
 
     memset(&evtack_req, 0, sizeof(evtack_req));
     if (drv_cmd->state & MPI3MR_CMD_PENDING) {
         dprint_event_th(mrioc,
             "sending event ack failed due to command in use\n");
         goto out;
     }
     drv_cmd->state = MPI3MR_CMD_PENDING;
     drv_cmd->is_waiting = 0;
     drv_cmd->callback = mpi3mr_complete_evt_ack;
     evtack_req.host_tag = cpu_to_le16(drv_cmd->host_tag);
     evtack_req.function = MPI3_FUNCTION_EVENT_ACK;
     evtack_req.event = event;
     evtack_req.event_context = cpu_to_le32(event_ctx);
     retval = mpi3mr_admin_request_post(mrioc, &evtack_req,
         sizeof(evtack_req), 1);
     if (retval) {
         dprint_event_th(mrioc,
             "posting event ack request is failed\n");
         goto out_failed;
     }
 
     dprint_event_th(mrioc,
         "event ack in the top half for event(0x%02x), event_ctx(0x%08x) is posted\n",
         event, event_ctx);
 out:
     return;
 out_failed:
     drv_cmd->state = MPI3MR_CMD_NOTUSED;
     drv_cmd->callback = NULL;
     clear_bit(cmd_idx, mrioc->evtack_cmds_bitmap);
 }
 
 /**
  * mpi3mr_pcietopochg_evt_th - PCIETopologyChange evt tophalf
  * @mrioc: Adapter instance reference
  * @event_reply: event data
  *
  * Checks for the reason code and based on that either block I/O
  * to device, or unblock I/O to the device, or start the device
  * removal handshake with reason as remove with the firmware for
  * PCIe devices.
  *
  * Return: Nothing
  */
 static void mpi3mr_pcietopochg_evt_th(struct mpi3mr_ioc *mrioc,
     struct mpi3_event_notification_reply *event_reply)
 {
     struct mpi3_event_data_pcie_topology_change_list *topo_evt =
         (struct mpi3_event_data_pcie_topology_change_list *)event_reply->event_data;
     int i;
     u16 handle;
     u8 reason_code;
     struct mpi3mr_tgt_dev *tgtdev = NULL;
     struct mpi3mr_stgt_priv_data *scsi_tgt_priv_data = NULL;
 
     for (i = 0; i < topo_evt->num_entries; i++) {
         handle = le16_to_cpu(topo_evt->port_entry[i].attached_dev_handle);
         if (!handle)
             continue;
         reason_code = topo_evt->port_entry[i].port_status;
         scsi_tgt_priv_data =  NULL;
         tgtdev = mpi3mr_get_tgtdev_by_handle(mrioc, handle);
         if (tgtdev && tgtdev->starget && tgtdev->starget->hostdata)
             scsi_tgt_priv_data = (struct mpi3mr_stgt_priv_data *)
                 tgtdev->starget->hostdata;
         switch (reason_code) {
         case MPI3_EVENT_PCIE_TOPO_PS_NOT_RESPONDING:
             if (scsi_tgt_priv_data) {
                 scsi_tgt_priv_data->dev_removed = 1;
                 scsi_tgt_priv_data->dev_removedelay = 0;
                 atomic_set(&scsi_tgt_priv_data->block_io, 0);
             }
             mpi3mr_dev_rmhs_send_tm(mrioc, handle, NULL,
                 MPI3_CTRL_OP_REMOVE_DEVICE);
             break;
         case MPI3_EVENT_PCIE_TOPO_PS_DELAY_NOT_RESPONDING:
             if (scsi_tgt_priv_data) {
                 scsi_tgt_priv_data->dev_removedelay = 1;
                 atomic_inc(&scsi_tgt_priv_data->block_io);
             }
             break;
         case MPI3_EVENT_PCIE_TOPO_PS_RESPONDING:
             if (scsi_tgt_priv_data &&
                 scsi_tgt_priv_data->dev_removedelay) {
                 scsi_tgt_priv_data->dev_removedelay = 0;
                 atomic_dec_if_positive
                     (&scsi_tgt_priv_data->block_io);
             }
             break;
         case MPI3_EVENT_PCIE_TOPO_PS_PORT_CHANGED:
         default:
             break;
         }
         if (tgtdev)
             mpi3mr_tgtdev_put(tgtdev);
     }
 }
 
 /**
  * mpi3mr_sastopochg_evt_th - SASTopologyChange evt tophalf
  * @mrioc: Adapter instance reference
  * @event_reply: event data
  *
  * Checks for the reason code and based on that either block I/O
  * to device, or unblock I/O to the device, or start the device
  * removal handshake with reason as remove with the firmware for
  * SAS/SATA devices.
  *
  * Return: Nothing
  */
 static void mpi3mr_sastopochg_evt_th(struct mpi3mr_ioc *mrioc,
     struct mpi3_event_notification_reply *event_reply)
 {
     struct mpi3_event_data_sas_topology_change_list *topo_evt =
         (struct mpi3_event_data_sas_topology_change_list *)event_reply->event_data;
     int i;
     u16 handle;
     u8 reason_code;
     struct mpi3mr_tgt_dev *tgtdev = NULL;
     struct mpi3mr_stgt_priv_data *scsi_tgt_priv_data = NULL;
 
     for (i = 0; i < topo_evt->num_entries; i++) {
         handle = le16_to_cpu(topo_evt->phy_entry[i].attached_dev_handle);
         if (!handle)
             continue;
         reason_code = topo_evt->phy_entry[i].status &
             MPI3_EVENT_SAS_TOPO_PHY_RC_MASK;
         scsi_tgt_priv_data =  NULL;
         tgtdev = mpi3mr_get_tgtdev_by_handle(mrioc, handle);
         if (tgtdev && tgtdev->starget && tgtdev->starget->hostdata)
             scsi_tgt_priv_data = (struct mpi3mr_stgt_priv_data *)
                 tgtdev->starget->hostdata;
         switch (reason_code) {
         case MPI3_EVENT_SAS_TOPO_PHY_RC_TARG_NOT_RESPONDING:
             if (scsi_tgt_priv_data) {
                 scsi_tgt_priv_data->dev_removed = 1;
                 scsi_tgt_priv_data->dev_removedelay = 0;
                 atomic_set(&scsi_tgt_priv_data->block_io, 0);
             }
             mpi3mr_dev_rmhs_send_tm(mrioc, handle, NULL,
                 MPI3_CTRL_OP_REMOVE_DEVICE);
             break;
         case MPI3_EVENT_SAS_TOPO_PHY_RC_DELAY_NOT_RESPONDING:
             if (scsi_tgt_priv_data) {
                 scsi_tgt_priv_data->dev_removedelay = 1;
                 atomic_inc(&scsi_tgt_priv_data->block_io);
             }
             break;
         case MPI3_EVENT_SAS_TOPO_PHY_RC_RESPONDING:
             if (scsi_tgt_priv_data &&
                 scsi_tgt_priv_data->dev_removedelay) {
                 scsi_tgt_priv_data->dev_removedelay = 0;
                 atomic_dec_if_positive
                     (&scsi_tgt_priv_data->block_io);
             }
             break;
         case MPI3_EVENT_SAS_TOPO_PHY_RC_PHY_CHANGED:
         default:
             break;
         }
         if (tgtdev)
             mpi3mr_tgtdev_put(tgtdev);
     }
 }
 
 /**
  * mpi3mr_devstatuschg_evt_th - DeviceStatusChange evt tophalf
  * @mrioc: Adapter instance reference
  * @event_reply: event data
  *
  * Checks for the reason code and based on that either block I/O
  * to device, or unblock I/O to the device, or start the device
  * removal handshake with reason as remove/hide acknowledgment
  * with the firmware.
  *
  * Return: Nothing
  */
 static void mpi3mr_devstatuschg_evt_th(struct mpi3mr_ioc *mrioc,
     struct mpi3_event_notification_reply *event_reply)
 {
     u16 dev_handle = 0;
     u8 ublock = 0, block = 0, hide = 0, delete = 0, remove = 0;
     struct mpi3mr_tgt_dev *tgtdev = NULL;
     struct mpi3mr_stgt_priv_data *scsi_tgt_priv_data = NULL;
     struct mpi3_event_data_device_status_change *evtdata =
         (struct mpi3_event_data_device_status_change *)event_reply->event_data;
 
     if (mrioc->stop_drv_processing)
         goto out;
 
     dev_handle = le16_to_cpu(evtdata->dev_handle);
 
     switch (evtdata->reason_code) {
     case MPI3_EVENT_DEV_STAT_RC_INT_DEVICE_RESET_STRT:
     case MPI3_EVENT_DEV_STAT_RC_INT_IT_NEXUS_RESET_STRT:
         block = 1;
         break;
     case MPI3_EVENT_DEV_STAT_RC_HIDDEN:
         delete = 1;
         hide = 1;
         break;
     case MPI3_EVENT_DEV_STAT_RC_VD_NOT_RESPONDING:
         delete = 1;
         remove = 1;
         break;
     case MPI3_EVENT_DEV_STAT_RC_INT_DEVICE_RESET_CMP:
     case MPI3_EVENT_DEV_STAT_RC_INT_IT_NEXUS_RESET_CMP:
         ublock = 1;
         break;
     default:
         break;
     }
 
     tgtdev = mpi3mr_get_tgtdev_by_handle(mrioc, dev_handle);
     if (!tgtdev)
         goto out;
     if (hide)
         tgtdev->is_hidden = hide;
     if (tgtdev->starget && tgtdev->starget->hostdata) {
         scsi_tgt_priv_data = (struct mpi3mr_stgt_priv_data *)
             tgtdev->starget->hostdata;
         if (block)
             atomic_inc(&scsi_tgt_priv_data->block_io);
         if (delete)
             scsi_tgt_priv_data->dev_removed = 1;
         if (ublock)
             atomic_dec_if_positive(&scsi_tgt_priv_data->block_io);
     }
     if (remove)
         mpi3mr_dev_rmhs_send_tm(mrioc, dev_handle, NULL,
             MPI3_CTRL_OP_REMOVE_DEVICE);
     if (hide)
         mpi3mr_dev_rmhs_send_tm(mrioc, dev_handle, NULL,
             MPI3_CTRL_OP_HIDDEN_ACK);
 
 out:
     if (tgtdev)
         mpi3mr_tgtdev_put(tgtdev);
 }
 
 /**
  * mpi3mr_preparereset_evt_th - Prepare for reset event tophalf
  * @mrioc: Adapter instance reference
  * @event_reply: event data
  *
  * Blocks and unblocks host level I/O based on the reason code
  *
  * Return: Nothing
  */
 static void mpi3mr_preparereset_evt_th(struct mpi3mr_ioc *mrioc,
     struct mpi3_event_notification_reply *event_reply)
 {
     struct mpi3_event_data_prepare_for_reset *evtdata =
         (struct mpi3_event_data_prepare_for_reset *)event_reply->event_data;
 
     if (evtdata->reason_code == MPI3_EVENT_PREPARE_RESET_RC_START) {
         dprint_event_th(mrioc,
             "prepare for reset event top half with rc=start\n");
         if (mrioc->prepare_for_reset)
             return;
         mrioc->prepare_for_reset = 1;
         mrioc->prepare_for_reset_timeout_counter = 0;
     } else if (evtdata->reason_code == MPI3_EVENT_PREPARE_RESET_RC_ABORT) {
         dprint_event_th(mrioc,
             "prepare for reset top half with rc=abort\n");
         mrioc->prepare_for_reset = 0;
         mrioc->prepare_for_reset_timeout_counter = 0;
     }
     if ((event_reply->msg_flags & MPI3_EVENT_NOTIFY_MSGFLAGS_ACK_MASK)
         == MPI3_EVENT_NOTIFY_MSGFLAGS_ACK_REQUIRED)
         mpi3mr_send_event_ack(mrioc, event_reply->event, NULL,
             le32_to_cpu(event_reply->event_context));
 }
 
 /**
  * mpi3mr_energypackchg_evt_th - Energy pack change evt tophalf
  * @mrioc: Adapter instance reference
  * @event_reply: event data
  *
  * Identifies the new shutdown timeout value and update.
  *
  * Return: Nothing
  */
 static void mpi3mr_energypackchg_evt_th(struct mpi3mr_ioc *mrioc,
     struct mpi3_event_notification_reply *event_reply)
 {
     struct mpi3_event_data_energy_pack_change *evtdata =
         (struct mpi3_event_data_energy_pack_change *)event_reply->event_data;
     u16 shutdown_timeout = le16_to_cpu(evtdata->shutdown_timeout);
 
     if (shutdown_timeout <= 0) {
         ioc_warn(mrioc,
             "%s :Invalid Shutdown Timeout received = %d\n",
             __func__, shutdown_timeout);
         return;
     }
 
     ioc_info(mrioc,
         "%s :Previous Shutdown Timeout Value = %d New Shutdown Timeout Value = %d\n",
         __func__, mrioc->facts.shutdown_timeout, shutdown_timeout);
     mrioc->facts.shutdown_timeout = shutdown_timeout;
 }
 
 /**
  * mpi3mr_cablemgmt_evt_th - Cable management event tophalf
  * @mrioc: Adapter instance reference
  * @event_reply: event data
  *
  * Displays Cable manegemt event details.
  *
  * Return: Nothing
  */
 static void mpi3mr_cablemgmt_evt_th(struct mpi3mr_ioc *mrioc,
     struct mpi3_event_notification_reply *event_reply)
 {
     struct mpi3_event_data_cable_management *evtdata =
         (struct mpi3_event_data_cable_management *)event_reply->event_data;
 
     switch (evtdata->status) {
     case MPI3_EVENT_CABLE_MGMT_STATUS_INSUFFICIENT_POWER:
     {
         ioc_info(mrioc, "An active cable with receptacle_id %d cannot be powered.\n"
             "Devices connected to this cable are not detected.\n"
             "This cable requires %d mW of power.\n",
             evtdata->receptacle_id,
             le32_to_cpu(evtdata->active_cable_power_requirement));
         break;
     }
     case MPI3_EVENT_CABLE_MGMT_STATUS_DEGRADED:
     {
         ioc_info(mrioc, "A cable with receptacle_id %d is not running at optimal speed\n",
             evtdata->receptacle_id);
         break;
     }
     default:
         break;
     }
 }
 
 /**
  * mpi3mr_os_handle_events - Firmware event handler
  * @mrioc: Adapter instance reference
  * @event_reply: event data
  *
  * Identify whteher the event has to handled and acknowledged
  * and either process the event in the tophalf and/or schedule a
  * bottom half through mpi3mr_fwevt_worker.
  *
  * Return: Nothing
  */
 void mpi3mr_os_handle_events(struct mpi3mr_ioc *mrioc,
     struct mpi3_event_notification_reply *event_reply)
 {
     u16 evt_type, sz;
     struct mpi3mr_fwevt *fwevt = NULL;
     bool ack_req = 0, process_evt_bh = 0;
 
     if (mrioc->stop_drv_processing)
         return;
 
     if ((event_reply->msg_flags & MPI3_EVENT_NOTIFY_MSGFLAGS_ACK_MASK)
         == MPI3_EVENT_NOTIFY_MSGFLAGS_ACK_REQUIRED)
         ack_req = 1;
 
     evt_type = event_reply->event;
 
     switch (evt_type) {
     case MPI3_EVENT_DEVICE_ADDED:
     {
         struct mpi3_device_page0 *dev_pg0 =
             (struct mpi3_device_page0 *)event_reply->event_data;
         if (mpi3mr_create_tgtdev(mrioc, dev_pg0))
             ioc_err(mrioc,
                 "%s :Failed to add device in the device add event\n",
                 __func__);
         else
             process_evt_bh = 1;
         break;
     }
     case MPI3_EVENT_DEVICE_STATUS_CHANGE:
     {
         process_evt_bh = 1;
         mpi3mr_devstatuschg_evt_th(mrioc, event_reply);
         break;
     }
     case MPI3_EVENT_SAS_TOPOLOGY_CHANGE_LIST:
     {
         process_evt_bh = 1;
         mpi3mr_sastopochg_evt_th(mrioc, event_reply);
         break;
     }
     case MPI3_EVENT_PCIE_TOPOLOGY_CHANGE_LIST:
     {
         process_evt_bh = 1;
         mpi3mr_pcietopochg_evt_th(mrioc, event_reply);
         break;
     }
     case MPI3_EVENT_PREPARE_FOR_RESET:
     {
         mpi3mr_preparereset_evt_th(mrioc, event_reply);
         ack_req = 0;
         break;
     }
     case MPI3_EVENT_DEVICE_INFO_CHANGED:
     case MPI3_EVENT_LOG_DATA:
     {
         process_evt_bh = 1;
         break;
     }
     case MPI3_EVENT_ENERGY_PACK_CHANGE:
     {
         mpi3mr_energypackchg_evt_th(mrioc, event_reply);
         break;
     }
     case MPI3_EVENT_CABLE_MGMT:
     {
         mpi3mr_cablemgmt_evt_th(mrioc, event_reply);
         break;
     }
     case MPI3_EVENT_ENCL_DEVICE_STATUS_CHANGE:
     case MPI3_EVENT_SAS_DISCOVERY:
     case MPI3_EVENT_SAS_DEVICE_DISCOVERY_ERROR:
     case MPI3_EVENT_SAS_BROADCAST_PRIMITIVE:
     case MPI3_EVENT_PCIE_ENUMERATION:
         break;
     default:
         ioc_info(mrioc, "%s :event 0x%02x is not handled\n",
             __func__, evt_type);
         break;
     }
     if (process_evt_bh || ack_req) {
         sz = event_reply->event_data_length * 4;
         fwevt = mpi3mr_alloc_fwevt(sz);
         if (!fwevt) {
             ioc_info(mrioc, "%s :failure at %s:%d/%s()!\n",
                 __func__, __FILE__, __LINE__, __func__);
             return;
         }
 
         memcpy(fwevt->event_data, event_reply->event_data, sz);
         fwevt->mrioc = mrioc;
         fwevt->event_id = evt_type;
         fwevt->send_ack = ack_req;
         fwevt->process_evt = process_evt_bh;
         fwevt->evt_ctx = le32_to_cpu(event_reply->event_context);
         mpi3mr_fwevt_add_to_list(mrioc, fwevt);
     }
 }
 
 /**
  * mpi3mr_setup_eedp - Setup EEDP information in MPI3 SCSI IO
  * @mrioc: Adapter instance reference
  * @scmd: SCSI command reference
  * @scsiio_req: MPI3 SCSI IO request
  *
  * Identifies the protection information flags from the SCSI
  * command and set appropriate flags in the MPI3 SCSI IO
  * request.
  *
  * Return: Nothing
  */
 static void mpi3mr_setup_eedp(struct mpi3mr_ioc *mrioc,
     struct scsi_cmnd *scmd, struct mpi3_scsi_io_request *scsiio_req)
 {
     u16 eedp_flags = 0;
     unsigned char prot_op = scsi_get_prot_op(scmd);
 
     switch (prot_op) {
     case SCSI_PROT_NORMAL:
         return;
     case SCSI_PROT_READ_STRIP:
         eedp_flags = MPI3_EEDPFLAGS_EEDP_OP_CHECK_REMOVE;
         break;
     case SCSI_PROT_WRITE_INSERT:
         eedp_flags = MPI3_EEDPFLAGS_EEDP_OP_INSERT;
         break;
     case SCSI_PROT_READ_INSERT:
         eedp_flags = MPI3_EEDPFLAGS_EEDP_OP_INSERT;
         scsiio_req->msg_flags |= MPI3_SCSIIO_MSGFLAGS_METASGL_VALID;
         break;
     case SCSI_PROT_WRITE_STRIP:
         eedp_flags = MPI3_EEDPFLAGS_EEDP_OP_CHECK_REMOVE;
         scsiio_req->msg_flags |= MPI3_SCSIIO_MSGFLAGS_METASGL_VALID;
         break;
     case SCSI_PROT_READ_PASS:
         eedp_flags = MPI3_EEDPFLAGS_EEDP_OP_CHECK;
         scsiio_req->msg_flags |= MPI3_SCSIIO_MSGFLAGS_METASGL_VALID;
         break;
     case SCSI_PROT_WRITE_PASS:
         if (scmd->prot_flags & SCSI_PROT_IP_CHECKSUM) {
             eedp_flags = MPI3_EEDPFLAGS_EEDP_OP_CHECK_REGEN;
             scsiio_req->sgl[0].eedp.application_tag_translation_mask =
                 0xffff;
         } else
             eedp_flags = MPI3_EEDPFLAGS_EEDP_OP_CHECK;
 
         scsiio_req->msg_flags |= MPI3_SCSIIO_MSGFLAGS_METASGL_VALID;
         break;
     default:
         return;
     }
 
     if (scmd->prot_flags & SCSI_PROT_GUARD_CHECK)
         eedp_flags |= MPI3_EEDPFLAGS_CHK_GUARD;
 
     if (scmd->prot_flags & SCSI_PROT_IP_CHECKSUM)
         eedp_flags |= MPI3_EEDPFLAGS_HOST_GUARD_IP_CHKSUM;
 
     if (scmd->prot_flags & SCSI_PROT_REF_CHECK) {
         eedp_flags |= MPI3_EEDPFLAGS_CHK_REF_TAG |
             MPI3_EEDPFLAGS_INCR_PRI_REF_TAG;
         scsiio_req->cdb.eedp32.primary_reference_tag =
             cpu_to_be32(scsi_prot_ref_tag(scmd));
     }
 
     if (scmd->prot_flags & SCSI_PROT_REF_INCREMENT)
         eedp_flags |= MPI3_EEDPFLAGS_INCR_PRI_REF_TAG;
 
     eedp_flags |= MPI3_EEDPFLAGS_ESC_MODE_APPTAG_DISABLE;
 
     switch (scsi_prot_interval(scmd)) {
     case 512:
         scsiio_req->sgl[0].eedp.user_data_size = MPI3_EEDP_UDS_512;
         break;
     case 520:
         scsiio_req->sgl[0].eedp.user_data_size = MPI3_EEDP_UDS_520;
         break;
     case 4080:
         scsiio_req->sgl[0].eedp.user_data_size = MPI3_EEDP_UDS_4080;
         break;
     case 4088:
         scsiio_req->sgl[0].eedp.user_data_size = MPI3_EEDP_UDS_4088;
         break;
     case 4096:
         scsiio_req->sgl[0].eedp.user_data_size = MPI3_EEDP_UDS_4096;
         break;
     case 4104:
         scsiio_req->sgl[0].eedp.user_data_size = MPI3_EEDP_UDS_4104;
         break;
     case 4160:
         scsiio_req->sgl[0].eedp.user_data_size = MPI3_EEDP_UDS_4160;
         break;
     default:
         break;
     }
 
     scsiio_req->sgl[0].eedp.eedp_flags = cpu_to_le16(eedp_flags);
     scsiio_req->sgl[0].eedp.flags = MPI3_SGE_FLAGS_ELEMENT_TYPE_EXTENDED;
 }
 
 /**
  * mpi3mr_build_sense_buffer - Map sense information
  * @desc: Sense type
  * @buf: Sense buffer to populate
  * @key: Sense key
  * @asc: Additional sense code
  * @ascq: Additional sense code qualifier
  *
  * Maps the given sense information into either descriptor or
  * fixed format sense data.
  *
  * Return: Nothing
  */
 static inline void mpi3mr_build_sense_buffer(int desc, u8 *buf, u8 key,
     u8 asc, u8 ascq)
 {
     if (desc) {
         buf[0] = 0x72;  /* descriptor, current */
         buf[1] = key;
         buf[2] = asc;
         buf[3] = ascq;
         buf[7] = 0;
     } else {
         buf[0] = 0x70;  /* fixed, current */
         buf[2] = key;
         buf[7] = 0xa;
         buf[12] = asc;
         buf[13] = ascq;
     }
 }
 
 /**
  * mpi3mr_map_eedp_error - Map EEDP errors from IOC status
  * @scmd: SCSI command reference
  * @ioc_status: status of MPI3 request
  *
  * Maps the EEDP error status of the SCSI IO request to sense
  * data.
  *
  * Return: Nothing
  */
 static void mpi3mr_map_eedp_error(struct scsi_cmnd *scmd,
     u16 ioc_status)
 {
     u8 ascq = 0;
 
     switch (ioc_status) {
     case MPI3_IOCSTATUS_EEDP_GUARD_ERROR:
         ascq = 0x01;
         break;
     case MPI3_IOCSTATUS_EEDP_APP_TAG_ERROR:
         ascq = 0x02;
         break;
     case MPI3_IOCSTATUS_EEDP_REF_TAG_ERROR:
         ascq = 0x03;
         break;
     default:
         ascq = 0x00;
         break;
     }
 
     mpi3mr_build_sense_buffer(0, scmd->sense_buffer, ILLEGAL_REQUEST,
         0x10, ascq);
     scmd->result = (DID_ABORT << 16) | SAM_STAT_CHECK_CONDITION;
 }
 
 /**
  * mpi3mr_process_op_reply_desc - reply descriptor handler
  * @mrioc: Adapter instance reference
  * @reply_desc: Operational reply descriptor
  * @reply_dma: place holder for reply DMA address
  * @qidx: Operational queue index
  *
  * Process the operational reply descriptor and identifies the
  * descriptor type. Based on the descriptor map the MPI3 request
  * status to a SCSI command status and calls scsi_done call
  * back.
  *
  * Return: Nothing
  */
 void mpi3mr_process_op_reply_desc(struct mpi3mr_ioc *mrioc,
     struct mpi3_default_reply_descriptor *reply_desc, u64 *reply_dma, u16 qidx)
 {
     u16 reply_desc_type, host_tag = 0;
     u16 ioc_status = MPI3_IOCSTATUS_SUCCESS;
     u32 ioc_loginfo = 0;
     struct mpi3_status_reply_descriptor *status_desc = NULL;
     struct mpi3_address_reply_descriptor *addr_desc = NULL;
     struct mpi3_success_reply_descriptor *success_desc = NULL;
     struct mpi3_scsi_io_reply *scsi_reply = NULL;
     struct scsi_cmnd *scmd = NULL;
     struct scmd_priv *priv = NULL;
     u8 *sense_buf = NULL;
     u8 scsi_state = 0, scsi_status = 0, sense_state = 0;
     u32 xfer_count = 0, sense_count = 0, resp_data = 0;
     u16 dev_handle = 0xFFFF;
     struct scsi_sense_hdr sshdr;
     struct mpi3mr_stgt_priv_data *stgt_priv_data = NULL;
     struct mpi3mr_sdev_priv_data *sdev_priv_data = NULL;
     u32 ioc_pend_data_len = 0, tg_pend_data_len = 0, data_len_blks = 0;
     struct mpi3mr_throttle_group_info *tg = NULL;
     u8 throttle_enabled_dev = 0;
 
     *reply_dma = 0;
     reply_desc_type = le16_to_cpu(reply_desc->reply_flags) &
         MPI3_REPLY_DESCRIPT_FLAGS_TYPE_MASK;
     switch (reply_desc_type) {
     case MPI3_REPLY_DESCRIPT_FLAGS_TYPE_STATUS:
         status_desc = (struct mpi3_status_reply_descriptor *)reply_desc;
         host_tag = le16_to_cpu(status_desc->host_tag);
         ioc_status = le16_to_cpu(status_desc->ioc_status);
         if (ioc_status &
             MPI3_REPLY_DESCRIPT_STATUS_IOCSTATUS_LOGINFOAVAIL)
             ioc_loginfo = le32_to_cpu(status_desc->ioc_log_info);
         ioc_status &= MPI3_REPLY_DESCRIPT_STATUS_IOCSTATUS_STATUS_MASK;
         break;
     case MPI3_REPLY_DESCRIPT_FLAGS_TYPE_ADDRESS_REPLY:
         addr_desc = (struct mpi3_address_reply_descriptor *)reply_desc;
         *reply_dma = le64_to_cpu(addr_desc->reply_frame_address);
         scsi_reply = mpi3mr_get_reply_virt_addr(mrioc,
             *reply_dma);
         if (!scsi_reply) {
             panic("%s: scsi_reply is NULL, this shouldn't happen\n",
                 mrioc->name);
             goto out;
         }
         host_tag = le16_to_cpu(scsi_reply->host_tag);
         ioc_status = le16_to_cpu(scsi_reply->ioc_status);
         scsi_status = scsi_reply->scsi_status;
         scsi_state = scsi_reply->scsi_state;
         dev_handle = le16_to_cpu(scsi_reply->dev_handle);
         sense_state = (scsi_state & MPI3_SCSI_STATE_SENSE_MASK);
         xfer_count = le32_to_cpu(scsi_reply->transfer_count);
         sense_count = le32_to_cpu(scsi_reply->sense_count);
         resp_data = le32_to_cpu(scsi_reply->response_data);
         sense_buf = mpi3mr_get_sensebuf_virt_addr(mrioc,
             le64_to_cpu(scsi_reply->sense_data_buffer_address));
         if (ioc_status &
             MPI3_REPLY_DESCRIPT_STATUS_IOCSTATUS_LOGINFOAVAIL)
             ioc_loginfo = le32_to_cpu(scsi_reply->ioc_log_info);
         ioc_status &= MPI3_REPLY_DESCRIPT_STATUS_IOCSTATUS_STATUS_MASK;
         if (sense_state == MPI3_SCSI_STATE_SENSE_BUFF_Q_EMPTY)
             panic("%s: Ran out of sense buffers\n", mrioc->name);
         break;
     case MPI3_REPLY_DESCRIPT_FLAGS_TYPE_SUCCESS:
         success_desc = (struct mpi3_success_reply_descriptor *)reply_desc;
         host_tag = le16_to_cpu(success_desc->host_tag);
         break;
     default:
         break;
     }
     scmd = mpi3mr_scmd_from_host_tag(mrioc, host_tag, qidx);
     if (!scmd) {
         panic("%s: Cannot Identify scmd for host_tag 0x%x\n",
             mrioc->name, host_tag);
         goto out;
     }
     priv = scsi_cmd_priv(scmd);
 
     data_len_blks = scsi_bufflen(scmd) >> 9;
     sdev_priv_data = scmd->device->hostdata;
     if (sdev_priv_data) {
         stgt_priv_data = sdev_priv_data->tgt_priv_data;
         if (stgt_priv_data) {
             tg = stgt_priv_data->throttle_group;
             throttle_enabled_dev =
                 stgt_priv_data->io_throttle_enabled;
         }
     }
     if (unlikely((data_len_blks >= mrioc->io_throttle_data_length) &&
         throttle_enabled_dev)) {
         ioc_pend_data_len = atomic_sub_return(data_len_blks,
             &mrioc->pend_large_data_sz);
         if (tg) {
             tg_pend_data_len = atomic_sub_return(data_len_blks,
                 &tg->pend_large_data_sz);
             if (tg->io_divert  && ((ioc_pend_data_len <=
                 mrioc->io_throttle_low) &&
                 (tg_pend_data_len <= tg->low))) {
                 tg->io_divert = 0;
                 mpi3mr_set_io_divert_for_all_vd_in_tg(
                     mrioc, tg, 0);
             }
         } else {
             if (ioc_pend_data_len <= mrioc->io_throttle_low)
                 stgt_priv_data->io_divert = 0;
         }
     } else if (unlikely((stgt_priv_data && stgt_priv_data->io_divert))) {
         ioc_pend_data_len = atomic_read(&mrioc->pend_large_data_sz);
         if (!tg) {
             if (ioc_pend_data_len <= mrioc->io_throttle_low)
                 stgt_priv_data->io_divert = 0;
 
         } else if (ioc_pend_data_len <= mrioc->io_throttle_low) {
             tg_pend_data_len = atomic_read(&tg->pend_large_data_sz);
             if (tg->io_divert  && (tg_pend_data_len <= tg->low)) {
                 tg->io_divert = 0;
                 mpi3mr_set_io_divert_for_all_vd_in_tg(
                     mrioc, tg, 0);
             }
         }
     }
 
     if (success_desc) {
         scmd->result = DID_OK << 16;
         goto out_success;
     }
 
     scsi_set_resid(scmd, scsi_bufflen(scmd) - xfer_count);
     if (ioc_status == MPI3_IOCSTATUS_SCSI_DATA_UNDERRUN &&
         xfer_count == 0 && (scsi_status == MPI3_SCSI_STATUS_BUSY ||
         scsi_status == MPI3_SCSI_STATUS_RESERVATION_CONFLICT ||
         scsi_status == MPI3_SCSI_STATUS_TASK_SET_FULL))
         ioc_status = MPI3_IOCSTATUS_SUCCESS;
 
     if ((sense_state == MPI3_SCSI_STATE_SENSE_VALID) && sense_count &&
         sense_buf) {
         u32 sz = min_t(u32, SCSI_SENSE_BUFFERSIZE, sense_count);
 
         memcpy(scmd->sense_buffer, sense_buf, sz);
     }
 
     switch (ioc_status) {
     case MPI3_IOCSTATUS_BUSY:
     case MPI3_IOCSTATUS_INSUFFICIENT_RESOURCES:
         scmd->result = SAM_STAT_BUSY;
         break;
     case MPI3_IOCSTATUS_SCSI_DEVICE_NOT_THERE:
         scmd->result = DID_NO_CONNECT << 16;
         break;
     case MPI3_IOCSTATUS_SCSI_IOC_TERMINATED:
         scmd->result = DID_SOFT_ERROR << 16;
         break;
     case MPI3_IOCSTATUS_SCSI_TASK_TERMINATED:
     case MPI3_IOCSTATUS_SCSI_EXT_TERMINATED:
         scmd->result = DID_RESET << 16;
         break;
     case MPI3_IOCSTATUS_SCSI_RESIDUAL_MISMATCH:
         if ((xfer_count == 0) || (scmd->underflow > xfer_count))
             scmd->result = DID_SOFT_ERROR << 16;
         else
             scmd->result = (DID_OK << 16) | scsi_status;
         break;
     case MPI3_IOCSTATUS_SCSI_DATA_UNDERRUN:
         scmd->result = (DID_OK << 16) | scsi_status;
         if (sense_state == MPI3_SCSI_STATE_SENSE_VALID)
             break;
         if (xfer_count < scmd->underflow) {
             if (scsi_status == SAM_STAT_BUSY)
                 scmd->result = SAM_STAT_BUSY;
             else
                 scmd->result = DID_SOFT_ERROR << 16;
         } else if ((scsi_state & (MPI3_SCSI_STATE_NO_SCSI_STATUS)) ||
             (sense_state != MPI3_SCSI_STATE_SENSE_NOT_AVAILABLE))
             scmd->result = DID_SOFT_ERROR << 16;
         else if (scsi_state & MPI3_SCSI_STATE_TERMINATED)
             scmd->result = DID_RESET << 16;
         break;
     case MPI3_IOCSTATUS_SCSI_DATA_OVERRUN:
         scsi_set_resid(scmd, 0);
         fallthrough;
     case MPI3_IOCSTATUS_SCSI_RECOVERED_ERROR:
     case MPI3_IOCSTATUS_SUCCESS:
         scmd->result = (DID_OK << 16) | scsi_status;
         if ((scsi_state & (MPI3_SCSI_STATE_NO_SCSI_STATUS)) ||
             (sense_state == MPI3_SCSI_STATE_SENSE_FAILED) ||
             (sense_state == MPI3_SCSI_STATE_SENSE_BUFF_Q_EMPTY))
             scmd->result = DID_SOFT_ERROR << 16;
         else if (scsi_state & MPI3_SCSI_STATE_TERMINATED)
             scmd->result = DID_RESET << 16;
         break;
     case MPI3_IOCSTATUS_EEDP_GUARD_ERROR:
     case MPI3_IOCSTATUS_EEDP_REF_TAG_ERROR:
     case MPI3_IOCSTATUS_EEDP_APP_TAG_ERROR:
         mpi3mr_map_eedp_error(scmd, ioc_status);
         break;
     case MPI3_IOCSTATUS_SCSI_PROTOCOL_ERROR:
     case MPI3_IOCSTATUS_INVALID_FUNCTION:
     case MPI3_IOCSTATUS_INVALID_SGL:
     case MPI3_IOCSTATUS_INTERNAL_ERROR:
     case MPI3_IOCSTATUS_INVALID_FIELD:
     case MPI3_IOCSTATUS_INVALID_STATE:
     case MPI3_IOCSTATUS_SCSI_IO_DATA_ERROR:
     case MPI3_IOCSTATUS_SCSI_TASK_MGMT_FAILED:
     case MPI3_IOCSTATUS_INSUFFICIENT_POWER:
     default:
         scmd->result = DID_SOFT_ERROR << 16;
         break;
     }
 
     if (scmd->result != (DID_OK << 16) && (scmd->cmnd[0] != ATA_12) &&
         (scmd->cmnd[0] != ATA_16)) {
         ioc_info(mrioc, "%s :scmd->result 0x%x\n", __func__,
             scmd->result);
         scsi_print_command(scmd);
         ioc_info(mrioc,
             "%s :Command issued to handle 0x%02x returned with error 0x%04x loginfo 0x%08x, qid %d\n",
             __func__, dev_handle, ioc_status, ioc_loginfo,
             priv->req_q_idx + 1);
         ioc_info(mrioc,
             " host_tag %d scsi_state 0x%02x scsi_status 0x%02x, xfer_cnt %d resp_data 0x%x\n",
             host_tag, scsi_state, scsi_status, xfer_count, resp_data);
         if (sense_buf) {
             scsi_normalize_sense(sense_buf, sense_count, &sshdr);
             ioc_info(mrioc,
                 "%s :sense_count 0x%x, sense_key 0x%x ASC 0x%x, ASCQ 0x%x\n",
                 __func__, sense_count, sshdr.sense_key,
                 sshdr.asc, sshdr.ascq);
         }
     }
 out_success:
     if (priv->meta_sg_valid) {
         dma_unmap_sg(&mrioc->pdev->dev, scsi_prot_sglist(scmd),
             scsi_prot_sg_count(scmd), scmd->sc_data_direction);
     }
     mpi3mr_clear_scmd_priv(mrioc, scmd);
     scsi_dma_unmap(scmd);
     scsi_done(scmd);
 out:
     if (sense_buf)
         mpi3mr_repost_sense_buf(mrioc,
             le64_to_cpu(scsi_reply->sense_data_buffer_address));
 }
 
 /**
  * mpi3mr_get_chain_idx - get free chain buffer index
  * @mrioc: Adapter instance reference
  *
  * Try to get a free chain buffer index from the free pool.
  *
  * Return: -1 on failure or the free chain buffer index
  */
 static int mpi3mr_get_chain_idx(struct mpi3mr_ioc *mrioc)
 {
     u8 retry_count = 5;
     int cmd_idx = -1;
 
     do {
         spin_lock(&mrioc->chain_buf_lock);
         cmd_idx = find_first_zero_bit(mrioc->chain_bitmap,
             mrioc->chain_buf_count);
         if (cmd_idx < mrioc->chain_buf_count) {
             set_bit(cmd_idx, mrioc->chain_bitmap);
             spin_unlock(&mrioc->chain_buf_lock);
             break;
         }
         spin_unlock(&mrioc->chain_buf_lock);
         cmd_idx = -1;
     } while (retry_count--);
     return cmd_idx;
 }
 
 /**
  * mpi3mr_prepare_sg_scmd - build scatter gather list
  * @mrioc: Adapter instance reference
  * @scmd: SCSI command reference
  * @scsiio_req: MPI3 SCSI IO request
  *
  * This function maps SCSI command's data and protection SGEs to
  * MPI request SGEs. If required additional 4K chain buffer is
  * used to send the SGEs.
  *
  * Return: 0 on success, -ENOMEM on dma_map_sg failure
  */
 static int mpi3mr_prepare_sg_scmd(struct mpi3mr_ioc *mrioc,
     struct scsi_cmnd *scmd, struct mpi3_scsi_io_request *scsiio_req)
 {
     dma_addr_t chain_dma;
     struct scatterlist *sg_scmd;
     void *sg_local, *chain;
     u32 chain_length;
     int sges_left, chain_idx;
     u32 sges_in_segment;
     u8 simple_sgl_flags;
     u8 simple_sgl_flags_last;
     u8 last_chain_sgl_flags;
     struct chain_element *chain_req;
     struct scmd_priv *priv = NULL;
     u32 meta_sg = le32_to_cpu(scsiio_req->flags) &
         MPI3_SCSIIO_FLAGS_DMAOPERATION_HOST_PI;
 
     priv = scsi_cmd_priv(scmd);
 
     simple_sgl_flags = MPI3_SGE_FLAGS_ELEMENT_TYPE_SIMPLE |
         MPI3_SGE_FLAGS_DLAS_SYSTEM;
     simple_sgl_flags_last = simple_sgl_flags |
         MPI3_SGE_FLAGS_END_OF_LIST;
     last_chain_sgl_flags = MPI3_SGE_FLAGS_ELEMENT_TYPE_LAST_CHAIN |
         MPI3_SGE_FLAGS_DLAS_SYSTEM;
 
     if (meta_sg)
         sg_local = &scsiio_req->sgl[MPI3_SCSIIO_METASGL_INDEX];
     else
         sg_local = &scsiio_req->sgl;
 
     if (!scsiio_req->data_length && !meta_sg) {
         mpi3mr_build_zero_len_sge(sg_local);
         return 0;
     }
 
     if (meta_sg) {
         sg_scmd = scsi_prot_sglist(scmd);
         sges_left = dma_map_sg(&mrioc->pdev->dev,
             scsi_prot_sglist(scmd),
             scsi_prot_sg_count(scmd),
             scmd->sc_data_direction);
         priv->meta_sg_valid = 1; /* To unmap meta sg DMA */
     } else {
         sg_scmd = scsi_sglist(scmd);
         sges_left = scsi_dma_map(scmd);
     }
 
     if (sges_left < 0) {
         sdev_printk(KERN_ERR, scmd->device,
             "scsi_dma_map failed: request for %d bytes!\n",
             scsi_bufflen(scmd));
         return -ENOMEM;
     }
     if (sges_left > MPI3MR_SG_DEPTH) {
         sdev_printk(KERN_ERR, scmd->device,
             "scsi_dma_map returned unsupported sge count %d!\n",
             sges_left);
         return -ENOMEM;
     }
 
     sges_in_segment = (mrioc->facts.op_req_sz -
         offsetof(struct mpi3_scsi_io_request, sgl)) / sizeof(struct mpi3_sge_common);
 
     if (scsiio_req->sgl[0].eedp.flags ==
         MPI3_SGE_FLAGS_ELEMENT_TYPE_EXTENDED && !meta_sg) {
         sg_local += sizeof(struct mpi3_sge_common);
         sges_in_segment--;
         /* Reserve 1st segment (scsiio_req->sgl[0]) for eedp */
     }
 
     if (scsiio_req->msg_flags ==
         MPI3_SCSIIO_MSGFLAGS_METASGL_VALID && !meta_sg) {
         sges_in_segment--;
         /* Reserve last segment (scsiio_req->sgl[3]) for meta sg */
     }
 
     if (meta_sg)
         sges_in_segment = 1;
 
     if (sges_left <= sges_in_segment)
         goto fill_in_last_segment;
 
     /* fill in main message segment when there is a chain following */
     while (sges_in_segment > 1) {
         mpi3mr_add_sg_single(sg_local, simple_sgl_flags,
             sg_dma_len(sg_scmd), sg_dma_address(sg_scmd));
         sg_scmd = sg_next(sg_scmd);
         sg_local += sizeof(struct mpi3_sge_common);
         sges_left--;
         sges_in_segment--;
     }
 
     chain_idx = mpi3mr_get_chain_idx(mrioc);
     if (chain_idx < 0)
         return -1;
     chain_req = &mrioc->chain_sgl_list[chain_idx];
     if (meta_sg)
         priv->meta_chain_idx = chain_idx;
     else
         priv->chain_idx = chain_idx;
 
     chain = chain_req->addr;
     chain_dma = chain_req->dma_addr;
     sges_in_segment = sges_left;
     chain_length = sges_in_segment * sizeof(struct mpi3_sge_common);
 
     mpi3mr_add_sg_single(sg_local, last_chain_sgl_flags,
         chain_length, chain_dma);
 
     sg_local = chain;
 
 fill_in_last_segment:
     while (sges_left > 0) {
         if (sges_left == 1)
             mpi3mr_add_sg_single(sg_local,
                 simple_sgl_flags_last, sg_dma_len(sg_scmd),
                 sg_dma_address(sg_scmd));
         else
             mpi3mr_add_sg_single(sg_local, simple_sgl_flags,
                 sg_dma_len(sg_scmd), sg_dma_address(sg_scmd));
         sg_scmd = sg_next(sg_scmd);
         sg_local += sizeof(struct mpi3_sge_common);
         sges_left--;
     }
 
     return 0;
 }
 
 /**
  * mpi3mr_build_sg_scmd - build scatter gather list for SCSI IO
  * @mrioc: Adapter instance reference
  * @scmd: SCSI command reference
  * @scsiio_req: MPI3 SCSI IO request
  *
  * This function calls mpi3mr_prepare_sg_scmd for constructing
  * both data SGEs and protection information SGEs in the MPI
  * format from the SCSI Command as appropriate .
  *
  * Return: return value of mpi3mr_prepare_sg_scmd.
  */
 static int mpi3mr_build_sg_scmd(struct mpi3mr_ioc *mrioc,
     struct scsi_cmnd *scmd, struct mpi3_scsi_io_request *scsiio_req)
 {
     int ret;
 
     ret = mpi3mr_prepare_sg_scmd(mrioc, scmd, scsiio_req);
     if (ret)
         return ret;
 
     if (scsiio_req->msg_flags == MPI3_SCSIIO_MSGFLAGS_METASGL_VALID) {
         /* There is a valid meta sg */
         scsiio_req->flags |=
             cpu_to_le32(MPI3_SCSIIO_FLAGS_DMAOPERATION_HOST_PI);
         ret = mpi3mr_prepare_sg_scmd(mrioc, scmd, scsiio_req);
     }
 
     return ret;
 }
 
 /**
  * mpi3mr_tm_response_name -  get TM response as a string
  * @resp_code: TM response code
  *
  * Convert known task management response code as a readable
  * string.
  *
  * Return: response code string.
  */
 static const char *mpi3mr_tm_response_name(u8 resp_code)
 {
     char *desc;
 
     switch (resp_code) {
     case MPI3_SCSITASKMGMT_RSPCODE_TM_COMPLETE:
         desc = "task management request completed";
         break;
     case MPI3_SCSITASKMGMT_RSPCODE_INVALID_FRAME:
         desc = "invalid frame";
         break;
     case MPI3_SCSITASKMGMT_RSPCODE_TM_FUNCTION_NOT_SUPPORTED:
         desc = "task management request not supported";
         break;
     case MPI3_SCSITASKMGMT_RSPCODE_TM_FAILED:
         desc = "task management request failed";
         break;
     case MPI3_SCSITASKMGMT_RSPCODE_TM_SUCCEEDED:
         desc = "task management request succeeded";
         break;
     case MPI3_SCSITASKMGMT_RSPCODE_TM_INVALID_LUN:
         desc = "invalid LUN";
         break;
     case MPI3_SCSITASKMGMT_RSPCODE_TM_OVERLAPPED_TAG:
         desc = "overlapped tag attempted";
         break;
     case MPI3_SCSITASKMGMT_RSPCODE_IO_QUEUED_ON_IOC:
         desc = "task queued, however not sent to target";
         break;
     case MPI3_SCSITASKMGMT_RSPCODE_TM_NVME_DENIED:
         desc = "task management request denied by NVMe device";
         break;
     default:
         desc = "unknown";
         break;
     }
 
     return desc;
 }
 
 inline void mpi3mr_poll_pend_io_completions(struct mpi3mr_ioc *mrioc)
 {
     int i;
     int num_of_reply_queues =
         mrioc->num_op_reply_q + mrioc->op_reply_q_offset;
 
     for (i = mrioc->op_reply_q_offset; i < num_of_reply_queues; i++)
         mpi3mr_process_op_reply_q(mrioc,
             mrioc->intr_info[i].op_reply_q);
 }
 
 /**
  * mpi3mr_issue_tm - Issue Task Management request
  * @mrioc: Adapter instance reference
  * @tm_type: Task Management type
  * @handle: Device handle
  * @lun: lun ID
  * @htag: Host tag of the TM request
  * @timeout: TM timeout value
  * @drv_cmd: Internal command tracker
  * @resp_code: Response code place holder
  * @scmd: SCSI command
  *
  * Issues a Task Management Request to the controller for a
  * specified target, lun and command and wait for its completion
  * and check TM response. Recover the TM if it timed out by
  * issuing controller reset.
  *
  * Return: 0 on success, non-zero on errors
  */
 int mpi3mr_issue_tm(struct mpi3mr_ioc *mrioc, u8 tm_type,
     u16 handle, uint lun, u16 htag, ulong timeout,
     struct mpi3mr_drv_cmd *drv_cmd,
     u8 *resp_code, struct scsi_cmnd *scmd)
 {
     struct mpi3_scsi_task_mgmt_request tm_req;
     struct mpi3_scsi_task_mgmt_reply *tm_reply = NULL;
     int retval = 0;
     struct mpi3mr_tgt_dev *tgtdev = NULL;
     struct mpi3mr_stgt_priv_data *scsi_tgt_priv_data = NULL;
     struct scmd_priv *cmd_priv = NULL;
     struct scsi_device *sdev = NULL;
     struct mpi3mr_sdev_priv_data *sdev_priv_data = NULL;
 
     ioc_info(mrioc, "%s :Issue TM: TM type (0x%x) for devhandle 0x%04x\n",
          __func__, tm_type, handle);
     if (mrioc->unrecoverable) {
         retval = -1;
         ioc_err(mrioc, "%s :Issue TM: Unrecoverable controller\n",
             __func__);
         goto out;
     }
 
     memset(&tm_req, 0, sizeof(tm_req));
     mutex_lock(&drv_cmd->mutex);
     if (drv_cmd->state & MPI3MR_CMD_PENDING) {
         retval = -1;
         ioc_err(mrioc, "%s :Issue TM: Command is in use\n", __func__);
         mutex_unlock(&drv_cmd->mutex);
         goto out;
     }
     if (mrioc->reset_in_progress) {
         retval = -1;
         ioc_err(mrioc, "%s :Issue TM: Reset in progress\n", __func__);
         mutex_unlock(&drv_cmd->mutex);
         goto out;
     }
 
     drv_cmd->state = MPI3MR_CMD_PENDING;
     drv_cmd->is_waiting = 1;
     drv_cmd->callback = NULL;
     tm_req.dev_handle = cpu_to_le16(handle);
     tm_req.task_type = tm_type;
     tm_req.host_tag = cpu_to_le16(htag);
 
     int_to_scsilun(lun, (struct scsi_lun *)tm_req.lun);
     tm_req.function = MPI3_FUNCTION_SCSI_TASK_MGMT;
 
     tgtdev = mpi3mr_get_tgtdev_by_handle(mrioc, handle);
 
     if (scmd) {
         sdev = scmd->device;
         sdev_priv_data = sdev->hostdata;
         scsi_tgt_priv_data = ((sdev_priv_data) ?
             sdev_priv_data->tgt_priv_data : NULL);
     } else {
         if (tgtdev && tgtdev->starget && tgtdev->starget->hostdata)
             scsi_tgt_priv_data = (struct mpi3mr_stgt_priv_data *)
                 tgtdev->starget->hostdata;
     }
 
     if (scsi_tgt_priv_data)
         atomic_inc(&scsi_tgt_priv_data->block_io);
 
     if (tgtdev && (tgtdev->dev_type == MPI3_DEVICE_DEVFORM_PCIE)) {
         if (cmd_priv && tgtdev->dev_spec.pcie_inf.abort_to)
             timeout = tgtdev->dev_spec.pcie_inf.abort_to;
         else if (!cmd_priv && tgtdev->dev_spec.pcie_inf.reset_to)
             timeout = tgtdev->dev_spec.pcie_inf.reset_to;
     }
 
     init_completion(&drv_cmd->done);
     retval = mpi3mr_admin_request_post(mrioc, &tm_req, sizeof(tm_req), 1);
     if (retval) {
         ioc_err(mrioc, "%s :Issue TM: Admin Post failed\n", __func__);
         goto out_unlock;
     }
     wait_for_completion_timeout(&drv_cmd->done, (timeout * HZ));
 
     if (!(drv_cmd->state & MPI3MR_CMD_COMPLETE)) {
         drv_cmd->is_waiting = 0;
         retval = -1;
         if (!(drv_cmd->state & MPI3MR_CMD_RESET)) {
             dprint_tm(mrioc,
                 "task management request timed out after %ld seconds\n",
                 timeout);
             if (mrioc->logging_level & MPI3_DEBUG_TM)
                 dprint_dump_req(&tm_req, sizeof(tm_req)/4);
             mpi3mr_soft_reset_handler(mrioc,
                 MPI3MR_RESET_FROM_TM_TIMEOUT, 1);
         }
         goto out_unlock;
     }
 
     if (!(drv_cmd->state & MPI3MR_CMD_REPLY_VALID)) {
         dprint_tm(mrioc, "invalid task management reply message\n");
         retval = -1;
         goto out_unlock;
     }
 
     tm_reply = (struct mpi3_scsi_task_mgmt_reply *)drv_cmd->reply;
 
     switch (drv_cmd->ioc_status) {
     case MPI3_IOCSTATUS_SUCCESS:
         *resp_code = le32_to_cpu(tm_reply->response_data) &
             MPI3MR_RI_MASK_RESPCODE;
         break;
     case MPI3_IOCSTATUS_SCSI_IOC_TERMINATED:
         *resp_code = MPI3_SCSITASKMGMT_RSPCODE_TM_COMPLETE;
         break;
     default:
         dprint_tm(mrioc,
             "task management request to handle(0x%04x) is failed with ioc_status(0x%04x) log_info(0x%08x)\n",
             handle, drv_cmd->ioc_status, drv_cmd->ioc_loginfo);
         retval = -1;
         goto out_unlock;
     }
 
     switch (*resp_code) {
     case MPI3_SCSITASKMGMT_RSPCODE_TM_SUCCEEDED:
     case MPI3_SCSITASKMGMT_RSPCODE_TM_COMPLETE:
         break;
     case MPI3_SCSITASKMGMT_RSPCODE_IO_QUEUED_ON_IOC:
         if (tm_type != MPI3_SCSITASKMGMT_TASKTYPE_QUERY_TASK)
             retval = -1;
         break;
     default:
         retval = -1;
         break;
     }
 
     dprint_tm(mrioc,
         "task management request type(%d) completed for handle(0x%04x) with ioc_status(0x%04x), log_info(0x%08x), termination_count(%d), response:%s(0x%x)\n",
         tm_type, handle, drv_cmd->ioc_status, drv_cmd->ioc_loginfo,
         le32_to_cpu(tm_reply->termination_count),
         mpi3mr_tm_response_name(*resp_code), *resp_code);
 
     if (!retval) {
         mpi3mr_ioc_disable_intr(mrioc);
         mpi3mr_poll_pend_io_completions(mrioc);
         mpi3mr_ioc_enable_intr(mrioc);
         mpi3mr_poll_pend_io_completions(mrioc);
     }
     switch (tm_type) {
     case MPI3_SCSITASKMGMT_TASKTYPE_TARGET_RESET:
         if (!scsi_tgt_priv_data)
             break;
         scsi_tgt_priv_data->pend_count = 0;
         blk_mq_tagset_busy_iter(&mrioc->shost->tag_set,
             mpi3mr_count_tgt_pending,
             (void *)scsi_tgt_priv_data->starget);
         break;
     case MPI3_SCSITASKMGMT_TASKTYPE_LOGICAL_UNIT_RESET:
         if (!sdev_priv_data)
             break;
         sdev_priv_data->pend_count = 0;
         blk_mq_tagset_busy_iter(&mrioc->shost->tag_set,
             mpi3mr_count_dev_pending, (void *)sdev);
         break;
     default:
         break;
     }
 
 out_unlock:
     drv_cmd->state = MPI3MR_CMD_NOTUSED;
     mutex_unlock(&drv_cmd->mutex);
     if (scsi_tgt_priv_data)
         atomic_dec_if_positive(&scsi_tgt_priv_data->block_io);
     if (tgtdev)
         mpi3mr_tgtdev_put(tgtdev);
 out:
     return retval;
 }
 
 /**
  * mpi3mr_bios_param - BIOS param callback
  * @sdev: SCSI device reference
  * @bdev: Block device reference
  * @capacity: Capacity in logical sectors
  * @params: Parameter array
  *
  * Just the parameters with heads/secots/cylinders.
  *
  * Return: 0 always
  */
 static int mpi3mr_bios_param(struct scsi_device *sdev,
     struct block_device *bdev, sector_t capacity, int params[])
 {
     int heads;
     int sectors;
     sector_t cylinders;
     ulong dummy;
 
     heads = 64;
     sectors = 32;
 
     dummy = heads * sectors;
     cylinders = capacity;
     sector_div(cylinders, dummy);
 
     if ((ulong)capacity >= 0x200000) {
         heads = 255;
         sectors = 63;
         dummy = heads * sectors;
         cylinders = capacity;
         sector_div(cylinders, dummy);
     }
 
     params[0] = heads;
     params[1] = sectors;
     params[2] = cylinders;
     return 0;
 }
 
 /**
  * mpi3mr_map_queues - Map queues callback handler
  * @shost: SCSI host reference
  *
  * Maps default and poll queues.
  *
  * Return: return zero.
  */
 static int mpi3mr_map_queues(struct Scsi_Host *shost)
 {
     struct mpi3mr_ioc *mrioc = shost_priv(shost);
     int i, qoff, offset;
     struct blk_mq_queue_map *map = NULL;
 
     offset = mrioc->op_reply_q_offset;
 
     for (i = 0, qoff = 0; i < HCTX_MAX_TYPES; i++) {
         map = &shost->tag_set.map[i];
 
         map->nr_queues  = 0;
 
         if (i == HCTX_TYPE_DEFAULT)
             map->nr_queues = mrioc->default_qcount;
         else if (i == HCTX_TYPE_POLL)
             map->nr_queues = mrioc->active_poll_qcount;
 
         if (!map->nr_queues) {
             BUG_ON(i == HCTX_TYPE_DEFAULT);
             continue;
         }
 
         /*
          * The poll queue(s) doesn't have an IRQ (and hence IRQ
          * affinity), so use the regular blk-mq cpu mapping
          */
         map->queue_offset = qoff;
         if (i != HCTX_TYPE_POLL)
             blk_mq_pci_map_queues(map, mrioc->pdev, offset);
         else
             blk_mq_map_queues(map);
 
         qoff += map->nr_queues;
         offset += map->nr_queues;
     }
 
     return 0;
 
 }
 
 /**
  * mpi3mr_get_fw_pending_ios - Calculate pending I/O count
  * @mrioc: Adapter instance reference
  *
  * Calculate the pending I/Os for the controller and return.
  *
  * Return: Number of pending I/Os
  */
 static inline int mpi3mr_get_fw_pending_ios(struct mpi3mr_ioc *mrioc)
 {
     u16 i;
     uint pend_ios = 0;
 
     for (i = 0; i < mrioc->num_op_reply_q; i++)
         pend_ios += atomic_read(&mrioc->op_reply_qinfo[i].pend_ios);
     return pend_ios;
 }
 
 /**
  * mpi3mr_print_pending_host_io - print pending I/Os
  * @mrioc: Adapter instance reference
  *
  * Print number of pending I/Os and each I/O details prior to
  * reset for debug purpose.
  *
  * Return: Nothing
  */
 static void mpi3mr_print_pending_host_io(struct mpi3mr_ioc *mrioc)
 {
     struct Scsi_Host *shost = mrioc->shost;
 
     ioc_info(mrioc, "%s :Pending commands prior to reset: %d\n",
         __func__, mpi3mr_get_fw_pending_ios(mrioc));
     blk_mq_tagset_busy_iter(&shost->tag_set,
         mpi3mr_print_scmd, (void *)mrioc);
 }
 
 /**
  * mpi3mr_wait_for_host_io - block for I/Os to complete
  * @mrioc: Adapter instance reference
  * @timeout: time out in seconds
  * Waits for pending I/Os for the given adapter to complete or
  * to hit the timeout.
  *
  * Return: Nothing
  */
 void mpi3mr_wait_for_host_io(struct mpi3mr_ioc *mrioc, u32 timeout)
 {
     enum mpi3mr_iocstate iocstate;
     int i = 0;
 
     iocstate = mpi3mr_get_iocstate(mrioc);
     if (iocstate != MRIOC_STATE_READY)
         return;
 
     if (!mpi3mr_get_fw_pending_ios(mrioc))
         return;
     ioc_info(mrioc,
         "%s :Waiting for %d seconds prior to reset for %d I/O\n",
         __func__, timeout, mpi3mr_get_fw_pending_ios(mrioc));
 
     for (i = 0; i < timeout; i++) {
         if (!mpi3mr_get_fw_pending_ios(mrioc))
             break;
         iocstate = mpi3mr_get_iocstate(mrioc);
         if (iocstate != MRIOC_STATE_READY)
             break;
         msleep(1000);
     }
 
     ioc_info(mrioc, "%s :Pending I/Os after wait is: %d\n", __func__,
         mpi3mr_get_fw_pending_ios(mrioc));
 }
 
 /**
  * mpi3mr_eh_host_reset - Host reset error handling callback
  * @scmd: SCSI command reference
  *
  * Issue controller reset if the scmd is for a Physical Device,
  * if the scmd is for RAID volume, then wait for
  * MPI3MR_RAID_ERRREC_RESET_TIMEOUT and checke whether any
  * pending I/Os prior to issuing reset to the controller.
  *
  * Return: SUCCESS of successful reset else FAILED
  */
 static int mpi3mr_eh_host_reset(struct scsi_cmnd *scmd)
 {
     struct mpi3mr_ioc *mrioc = shost_priv(scmd->device->host);
     struct mpi3mr_stgt_priv_data *stgt_priv_data;
     struct mpi3mr_sdev_priv_data *sdev_priv_data;
     u8 dev_type = MPI3_DEVICE_DEVFORM_VD;
     int retval = FAILED, ret;
 
     sdev_priv_data = scmd->device->hostdata;
     if (sdev_priv_data && sdev_priv_data->tgt_priv_data) {
         stgt_priv_data = sdev_priv_data->tgt_priv_data;
         dev_type = stgt_priv_data->dev_type;
     }
 
     if (dev_type == MPI3_DEVICE_DEVFORM_VD) {
         mpi3mr_wait_for_host_io(mrioc,
             MPI3MR_RAID_ERRREC_RESET_TIMEOUT);
         if (!mpi3mr_get_fw_pending_ios(mrioc)) {
             retval = SUCCESS;
             goto out;
         }
     }
 
     mpi3mr_print_pending_host_io(mrioc);
     ret = mpi3mr_soft_reset_handler(mrioc,
         MPI3MR_RESET_FROM_EH_HOS, 1);
     if (ret)
         goto out;
 
     retval = SUCCESS;
 out:
     sdev_printk(KERN_INFO, scmd->device,
         "Host reset is %s for scmd(%p)\n",
         ((retval == SUCCESS) ? "SUCCESS" : "FAILED"), scmd);
 
     return retval;
 }
 
 /**
  * mpi3mr_eh_target_reset - Target reset error handling callback
  * @scmd: SCSI command reference
  *
  * Issue Target reset Task Management and verify the scmd is
  * terminated successfully and return status accordingly.
  *
  * Return: SUCCESS of successful termination of the scmd else
  *         FAILED
  */
 static int mpi3mr_eh_target_reset(struct scsi_cmnd *scmd)
 {
     struct mpi3mr_ioc *mrioc = shost_priv(scmd->device->host);
     struct mpi3mr_stgt_priv_data *stgt_priv_data;
     struct mpi3mr_sdev_priv_data *sdev_priv_data;
     u16 dev_handle;
     u8 resp_code = 0;
     int retval = FAILED, ret = 0;
 
     sdev_printk(KERN_INFO, scmd->device,
         "Attempting Target Reset! scmd(%p)\n", scmd);
     scsi_print_command(scmd);
 
     sdev_priv_data = scmd->device->hostdata;
     if (!sdev_priv_data || !sdev_priv_data->tgt_priv_data) {
         sdev_printk(KERN_INFO, scmd->device,
             "SCSI device is not available\n");
         retval = SUCCESS;
         goto out;
     }
 
     stgt_priv_data = sdev_priv_data->tgt_priv_data;
     dev_handle = stgt_priv_data->dev_handle;
     if (stgt_priv_data->dev_removed) {
         sdev_printk(KERN_INFO, scmd->device,
             "%s:target(handle = 0x%04x) is removed, target reset is not issued\n",
             mrioc->name, dev_handle);
         retval = FAILED;
         goto out;
     }
     sdev_printk(KERN_INFO, scmd->device,
         "Target Reset is issued to handle(0x%04x)\n",
         dev_handle);
 
     ret = mpi3mr_issue_tm(mrioc,
         MPI3_SCSITASKMGMT_TASKTYPE_TARGET_RESET, dev_handle,
         sdev_priv_data->lun_id, MPI3MR_HOSTTAG_BLK_TMS,
         MPI3MR_RESETTM_TIMEOUT, &mrioc->host_tm_cmds, &resp_code, scmd);
 
     if (ret)
         goto out;
 
     if (stgt_priv_data->pend_count) {
         sdev_printk(KERN_INFO, scmd->device,
             "%s: target has %d pending commands, target reset is failed\n",
             mrioc->name, stgt_priv_data->pend_count);
         goto out;
     }
 
     retval = SUCCESS;
 out:
     sdev_printk(KERN_INFO, scmd->device,
         "%s: target reset is %s for scmd(%p)\n", mrioc->name,
         ((retval == SUCCESS) ? "SUCCESS" : "FAILED"), scmd);
 
     return retval;
 }
 
 /**
  * mpi3mr_eh_dev_reset- Device reset error handling callback
  * @scmd: SCSI command reference
  *
  * Issue lun reset Task Management and verify the scmd is
  * terminated successfully and return status accordingly.
  *
  * Return: SUCCESS of successful termination of the scmd else
  *         FAILED
  */
 static int mpi3mr_eh_dev_reset(struct scsi_cmnd *scmd)
 {
     struct mpi3mr_ioc *mrioc = shost_priv(scmd->device->host);
     struct mpi3mr_stgt_priv_data *stgt_priv_data;
     struct mpi3mr_sdev_priv_data *sdev_priv_data;
     u16 dev_handle;
     u8 resp_code = 0;
     int retval = FAILED, ret = 0;
 
     sdev_printk(KERN_INFO, scmd->device,
         "Attempting Device(lun) Reset! scmd(%p)\n", scmd);
     scsi_print_command(scmd);
 
     sdev_priv_data = scmd->device->hostdata;
     if (!sdev_priv_data || !sdev_priv_data->tgt_priv_data) {
         sdev_printk(KERN_INFO, scmd->device,
             "SCSI device is not available\n");
         retval = SUCCESS;
         goto out;
     }
 
     stgt_priv_data = sdev_priv_data->tgt_priv_data;
     dev_handle = stgt_priv_data->dev_handle;
     if (stgt_priv_data->dev_removed) {
         sdev_printk(KERN_INFO, scmd->device,
             "%s: device(handle = 0x%04x) is removed, device(LUN) reset is not issued\n",
             mrioc->name, dev_handle);
         retval = FAILED;
         goto out;
     }
     sdev_printk(KERN_INFO, scmd->device,
         "Device(lun) Reset is issued to handle(0x%04x)\n", dev_handle);
 
     ret = mpi3mr_issue_tm(mrioc,
         MPI3_SCSITASKMGMT_TASKTYPE_LOGICAL_UNIT_RESET, dev_handle,
         sdev_priv_data->lun_id, MPI3MR_HOSTTAG_BLK_TMS,
         MPI3MR_RESETTM_TIMEOUT, &mrioc->host_tm_cmds, &resp_code, scmd);
 
     if (ret)
         goto out;
 
     if (sdev_priv_data->pend_count) {
         sdev_printk(KERN_INFO, scmd->device,
             "%s: device has %d pending commands, device(LUN) reset is failed\n",
             mrioc->name, sdev_priv_data->pend_count);
         goto out;
     }
     retval = SUCCESS;
 out:
     sdev_printk(KERN_INFO, scmd->device,
         "%s: device(LUN) reset is %s for scmd(%p)\n", mrioc->name,
         ((retval == SUCCESS) ? "SUCCESS" : "FAILED"), scmd);
 
     return retval;
 }
 
 /**
  * mpi3mr_scan_start - Scan start callback handler
  * @shost: SCSI host reference
  *
  * Issue port enable request asynchronously.
  *
  * Return: Nothing
  */
 static void mpi3mr_scan_start(struct Scsi_Host *shost)
 {
     struct mpi3mr_ioc *mrioc = shost_priv(shost);
 
     mrioc->scan_started = 1;
     ioc_info(mrioc, "%s :Issuing Port Enable\n", __func__);
     if (mpi3mr_issue_port_enable(mrioc, 1)) {
         ioc_err(mrioc, "%s :Issuing port enable failed\n", __func__);
         mrioc->scan_started = 0;
         mrioc->scan_failed = MPI3_IOCSTATUS_INTERNAL_ERROR;
     }
 }
 
 /**
  * mpi3mr_scan_finished - Scan finished callback handler
  * @shost: SCSI host reference
  * @time: Jiffies from the scan start
  *
  * Checks whether the port enable is completed or timedout or
  * failed and set the scan status accordingly after taking any
  * recovery if required.
  *
  * Return: 1 on scan finished or timed out, 0 for in progress
  */
 static int mpi3mr_scan_finished(struct Scsi_Host *shost,
     unsigned long time)
 {
     struct mpi3mr_ioc *mrioc = shost_priv(shost);
     u32 pe_timeout = MPI3MR_PORTENABLE_TIMEOUT;
     u32 ioc_status = readl(&mrioc->sysif_regs->ioc_status);
 
     if ((ioc_status & MPI3_SYSIF_IOC_STATUS_RESET_HISTORY) ||
         (ioc_status & MPI3_SYSIF_IOC_STATUS_FAULT)) {
         ioc_err(mrioc, "port enable failed due to fault or reset\n");
         mpi3mr_print_fault_info(mrioc);
         mrioc->scan_failed = MPI3_IOCSTATUS_INTERNAL_ERROR;
         mrioc->scan_started = 0;
         mrioc->init_cmds.is_waiting = 0;
         mrioc->init_cmds.callback = NULL;
         mrioc->init_cmds.state = MPI3MR_CMD_NOTUSED;
     }
 
     if (time >= (pe_timeout * HZ)) {
         ioc_err(mrioc, "port enable failed due to time out\n");
         mpi3mr_check_rh_fault_ioc(mrioc,
             MPI3MR_RESET_FROM_PE_TIMEOUT);
         mrioc->scan_failed = MPI3_IOCSTATUS_INTERNAL_ERROR;
         mrioc->scan_started = 0;
         mrioc->init_cmds.is_waiting = 0;
         mrioc->init_cmds.callback = NULL;
         mrioc->init_cmds.state = MPI3MR_CMD_NOTUSED;
     }
 
     if (mrioc->scan_started)
         return 0;
 
     if (mrioc->scan_failed) {
         ioc_err(mrioc,
             "port enable failed with status=0x%04x\n",
             mrioc->scan_failed);
     } else
         ioc_info(mrioc, "port enable is successfully completed\n");
 
     mpi3mr_start_watchdog(mrioc);
     mrioc->is_driver_loading = 0;
     mrioc->stop_bsgs = 0;
     return 1;
 }
 
 /**
  * mpi3mr_slave_destroy - Slave destroy callback handler
  * @sdev: SCSI device reference
  *
  * Cleanup and free per device(lun) private data.
  *
  * Return: Nothing.
  */
 static void mpi3mr_slave_destroy(struct scsi_device *sdev)
 {
     struct Scsi_Host *shost;
     struct mpi3mr_ioc *mrioc;
     struct mpi3mr_stgt_priv_data *scsi_tgt_priv_data;
     struct mpi3mr_tgt_dev *tgt_dev;
     unsigned long flags;
     struct scsi_target *starget;
 
     if (!sdev->hostdata)
         return;
 
     starget = scsi_target(sdev);
     shost = dev_to_shost(&starget->dev);
     mrioc = shost_priv(shost);
     scsi_tgt_priv_data = starget->hostdata;
 
     scsi_tgt_priv_data->num_luns--;
 
     spin_lock_irqsave(&mrioc->tgtdev_lock, flags);
     tgt_dev = __mpi3mr_get_tgtdev_by_perst_id(mrioc, starget->id);
     if (tgt_dev && (!scsi_tgt_priv_data->num_luns))
         tgt_dev->starget = NULL;
     if (tgt_dev)
         mpi3mr_tgtdev_put(tgt_dev);
     spin_unlock_irqrestore(&mrioc->tgtdev_lock, flags);
 
     kfree(sdev->hostdata);
     sdev->hostdata = NULL;
 }
 
 /**
  * mpi3mr_target_destroy - Target destroy callback handler
  * @starget: SCSI target reference
  *
  * Cleanup and free per target private data.
  *
  * Return: Nothing.
  */
 static void mpi3mr_target_destroy(struct scsi_target *starget)
 {
     struct Scsi_Host *shost;
     struct mpi3mr_ioc *mrioc;
     struct mpi3mr_stgt_priv_data *scsi_tgt_priv_data;
     struct mpi3mr_tgt_dev *tgt_dev;
     unsigned long flags;
 
     if (!starget->hostdata)
         return;
 
     shost = dev_to_shost(&starget->dev);
     mrioc = shost_priv(shost);
     scsi_tgt_priv_data = starget->hostdata;
 
     spin_lock_irqsave(&mrioc->tgtdev_lock, flags);
     tgt_dev = __mpi3mr_get_tgtdev_from_tgtpriv(mrioc, scsi_tgt_priv_data);
     if (tgt_dev && (tgt_dev->starget == starget) &&
         (tgt_dev->perst_id == starget->id))
         tgt_dev->starget = NULL;
     if (tgt_dev) {
         scsi_tgt_priv_data->tgt_dev = NULL;
         scsi_tgt_priv_data->perst_id = 0;
         mpi3mr_tgtdev_put(tgt_dev);
         mpi3mr_tgtdev_put(tgt_dev);
     }
     spin_unlock_irqrestore(&mrioc->tgtdev_lock, flags);
 
     kfree(starget->hostdata);
     starget->hostdata = NULL;
 }
 
 /**
  * mpi3mr_slave_configure - Slave configure callback handler
  * @sdev: SCSI device reference
  *
  * Configure queue depth, max hardware sectors and virt boundary
  * as required
  *
  * Return: 0 always.
  */
 static int mpi3mr_slave_configure(struct scsi_device *sdev)
 {
     struct scsi_target *starget;
     struct Scsi_Host *shost;
     struct mpi3mr_ioc *mrioc;
     struct mpi3mr_tgt_dev *tgt_dev;
     unsigned long flags;
     int retval = 0;
 
     starget = scsi_target(sdev);
     shost = dev_to_shost(&starget->dev);
     mrioc = shost_priv(shost);
 
     spin_lock_irqsave(&mrioc->tgtdev_lock, flags);
     tgt_dev = __mpi3mr_get_tgtdev_by_perst_id(mrioc, starget->id);
     spin_unlock_irqrestore(&mrioc->tgtdev_lock, flags);
     if (!tgt_dev)
         return -ENXIO;
 
     mpi3mr_change_queue_depth(sdev, tgt_dev->q_depth);
 
     sdev->eh_timeout = MPI3MR_EH_SCMD_TIMEOUT;
     blk_queue_rq_timeout(sdev->request_queue, MPI3MR_SCMD_TIMEOUT);
 
     switch (tgt_dev->dev_type) {
     case MPI3_DEVICE_DEVFORM_PCIE:
         /*The block layer hw sector size = 512*/
         if ((tgt_dev->dev_spec.pcie_inf.dev_info &
             MPI3_DEVICE0_PCIE_DEVICE_INFO_TYPE_MASK) ==
             MPI3_DEVICE0_PCIE_DEVICE_INFO_TYPE_NVME_DEVICE) {
             blk_queue_max_hw_sectors(sdev->request_queue,
                 tgt_dev->dev_spec.pcie_inf.mdts / 512);
             if (tgt_dev->dev_spec.pcie_inf.pgsz == 0)
                 blk_queue_virt_boundary(sdev->request_queue,
                     ((1 << MPI3MR_DEFAULT_PGSZEXP) - 1));
             else
                 blk_queue_virt_boundary(sdev->request_queue,
                     ((1 << tgt_dev->dev_spec.pcie_inf.pgsz) - 1));
         }
         break;
     default:
         break;
     }
 
     mpi3mr_tgtdev_put(tgt_dev);
 
     return retval;
 }
 
 /**
  * mpi3mr_slave_alloc -Slave alloc callback handler
  * @sdev: SCSI device reference
  *
  * Allocate per device(lun) private data and initialize it.
  *
  * Return: 0 on success -ENOMEM on memory allocation failure.
  */
 static int mpi3mr_slave_alloc(struct scsi_device *sdev)
 {
     struct Scsi_Host *shost;
     struct mpi3mr_ioc *mrioc;
     struct mpi3mr_stgt_priv_data *scsi_tgt_priv_data;
     struct mpi3mr_tgt_dev *tgt_dev;
     struct mpi3mr_sdev_priv_data *scsi_dev_priv_data;
     unsigned long flags;
     struct scsi_target *starget;
     int retval = 0;
 
     starget = scsi_target(sdev);
     shost = dev_to_shost(&starget->dev);
     mrioc = shost_priv(shost);
     scsi_tgt_priv_data = starget->hostdata;
 
     spin_lock_irqsave(&mrioc->tgtdev_lock, flags);
     tgt_dev = __mpi3mr_get_tgtdev_by_perst_id(mrioc, starget->id);
 
     if (tgt_dev) {
         if (tgt_dev->starget == NULL)
             tgt_dev->starget = starget;
         mpi3mr_tgtdev_put(tgt_dev);
         retval = 0;
     } else {
         spin_unlock_irqrestore(&mrioc->tgtdev_lock, flags);
         return -ENXIO;
     }
 
     spin_unlock_irqrestore(&mrioc->tgtdev_lock, flags);
 
     scsi_dev_priv_data = kzalloc(sizeof(*scsi_dev_priv_data), GFP_KERNEL);
     if (!scsi_dev_priv_data)
         return -ENOMEM;
 
     scsi_dev_priv_data->lun_id = sdev->lun;
     scsi_dev_priv_data->tgt_priv_data = scsi_tgt_priv_data;
     sdev->hostdata = scsi_dev_priv_data;
 
     scsi_tgt_priv_data->num_luns++;
 
     return retval;
 }
 
 /**
  * mpi3mr_target_alloc - Target alloc callback handler
  * @starget: SCSI target reference
  *
  * Allocate per target private data and initialize it.
  *
  * Return: 0 on success -ENOMEM on memory allocation failure.
  */
 static int mpi3mr_target_alloc(struct scsi_target *starget)
 {
     struct Scsi_Host *shost = dev_to_shost(&starget->dev);
     struct mpi3mr_ioc *mrioc = shost_priv(shost);
     struct mpi3mr_stgt_priv_data *scsi_tgt_priv_data;
     struct mpi3mr_tgt_dev *tgt_dev;
     unsigned long flags;
     int retval = 0;
 
     scsi_tgt_priv_data = kzalloc(sizeof(*scsi_tgt_priv_data), GFP_KERNEL);
     if (!scsi_tgt_priv_data)
         return -ENOMEM;
 
     starget->hostdata = scsi_tgt_priv_data;
 
     spin_lock_irqsave(&mrioc->tgtdev_lock, flags);
     tgt_dev = __mpi3mr_get_tgtdev_by_perst_id(mrioc, starget->id);
     if (tgt_dev && !tgt_dev->is_hidden) {
         scsi_tgt_priv_data->starget = starget;
         scsi_tgt_priv_data->dev_handle = tgt_dev->dev_handle;
         scsi_tgt_priv_data->perst_id = tgt_dev->perst_id;
         scsi_tgt_priv_data->dev_type = tgt_dev->dev_type;
         scsi_tgt_priv_data->tgt_dev = tgt_dev;
         tgt_dev->starget = starget;
         atomic_set(&scsi_tgt_priv_data->block_io, 0);
         retval = 0;
         scsi_tgt_priv_data->io_throttle_enabled =
             tgt_dev->io_throttle_enabled;
         if (tgt_dev->dev_type == MPI3_DEVICE_DEVFORM_VD)
             scsi_tgt_priv_data->throttle_group =
                 tgt_dev->dev_spec.vd_inf.tg;
     } else
         retval = -ENXIO;
     spin_unlock_irqrestore(&mrioc->tgtdev_lock, flags);
 
     return retval;
 }
 
 /**
  * mpi3mr_check_return_unmap - Whether an unmap is allowed
  * @mrioc: Adapter instance reference
  * @scmd: SCSI Command reference
  *
  * The controller hardware cannot handle certain unmap commands
  * for NVMe drives, this routine checks those and return true
  * and completes the SCSI command with proper status and sense
  * data.
  *
  * Return: TRUE for not  allowed unmap, FALSE otherwise.
  */
 static bool mpi3mr_check_return_unmap(struct mpi3mr_ioc *mrioc,
     struct scsi_cmnd *scmd)
 {
     unsigned char *buf;
     u16 param_len, desc_len, trunc_param_len;
 
     trunc_param_len = param_len = get_unaligned_be16(scmd->cmnd + 7);
 
     if (mrioc->pdev->revision) {
         if ((param_len > 24) && ((param_len - 8) & 0xF)) {
             trunc_param_len -= (param_len - 8) & 0xF;
             dprint_scsi_command(mrioc, scmd, MPI3_DEBUG_SCSI_ERROR);
             dprint_scsi_err(mrioc,
                 "truncating param_len from (%d) to (%d)\n",
                 param_len, trunc_param_len);
             put_unaligned_be16(trunc_param_len, scmd->cmnd + 7);
             dprint_scsi_command(mrioc, scmd, MPI3_DEBUG_SCSI_ERROR);
         }
         return false;
     }
 
     if (!param_len) {
         ioc_warn(mrioc,
             "%s: cdb received with zero parameter length\n",
             __func__);
         scsi_print_command(scmd);
         scmd->result = DID_OK << 16;
         scsi_done(scmd);
         return true;
     }
 
     if (param_len < 24) {
         ioc_warn(mrioc,
             "%s: cdb received with invalid param_len: %d\n",
             __func__, param_len);
         scsi_print_command(scmd);
         scmd->result = SAM_STAT_CHECK_CONDITION;
         scsi_build_sense_buffer(0, scmd->sense_buffer, ILLEGAL_REQUEST,
             0x1A, 0);
         scsi_done(scmd);
         return true;
     }
     if (param_len != scsi_bufflen(scmd)) {
         ioc_warn(mrioc,
             "%s: cdb received with param_len: %d bufflen: %d\n",
             __func__, param_len, scsi_bufflen(scmd));
         scsi_print_command(scmd);
         scmd->result = SAM_STAT_CHECK_CONDITION;
         scsi_build_sense_buffer(0, scmd->sense_buffer, ILLEGAL_REQUEST,
             0x1A, 0);
         scsi_done(scmd);
         return true;
     }
     buf = kzalloc(scsi_bufflen(scmd), GFP_ATOMIC);
     if (!buf) {
         scsi_print_command(scmd);
         scmd->result = SAM_STAT_CHECK_CONDITION;
         scsi_build_sense_buffer(0, scmd->sense_buffer, ILLEGAL_REQUEST,
             0x55, 0x03);
         scsi_done(scmd);
         return true;
     }
     scsi_sg_copy_to_buffer(scmd, buf, scsi_bufflen(scmd));
     desc_len = get_unaligned_be16(&buf[2]);
 
     if (desc_len < 16) {
         ioc_warn(mrioc,
             "%s: Invalid descriptor length in param list: %d\n",
             __func__, desc_len);
         scsi_print_command(scmd);
         scmd->result = SAM_STAT_CHECK_CONDITION;
         scsi_build_sense_buffer(0, scmd->sense_buffer, ILLEGAL_REQUEST,
             0x26, 0);
         scsi_done(scmd);
         kfree(buf);
         return true;
     }
 
     if (param_len > (desc_len + 8)) {
         trunc_param_len = desc_len + 8;
         scsi_print_command(scmd);
         dprint_scsi_err(mrioc,
             "truncating param_len(%d) to desc_len+8(%d)\n",
             param_len, trunc_param_len);
         put_unaligned_be16(trunc_param_len, scmd->cmnd + 7);
         scsi_print_command(scmd);
     }
 
     kfree(buf);
     return false;
 }
 
 /**
  * mpi3mr_allow_scmd_to_fw - Command is allowed during shutdown
  * @scmd: SCSI Command reference
  *
  * Checks whether a cdb is allowed during shutdown or not.
  *
  * Return: TRUE for allowed commands, FALSE otherwise.
  */
 
 inline bool mpi3mr_allow_scmd_to_fw(struct scsi_cmnd *scmd)
 {
     switch (scmd->cmnd[0]) {
     case SYNCHRONIZE_CACHE:
     case START_STOP:
         return true;
     default:
         return false;
     }
 }
 
 /**
  * mpi3mr_qcmd - I/O request despatcher
  * @shost: SCSI Host reference
  * @scmd: SCSI Command reference
  *
  * Issues the SCSI Command as an MPI3 request.
  *
  * Return: 0 on successful queueing of the request or if the
  *         request is completed with failure.
  *         SCSI_MLQUEUE_DEVICE_BUSY when the device is busy.
  *         SCSI_MLQUEUE_HOST_BUSY when the host queue is full.
  */
 static int mpi3mr_qcmd(struct Scsi_Host *shost,
     struct scsi_cmnd *scmd)
 {
     struct mpi3mr_ioc *mrioc = shost_priv(shost);
     struct mpi3mr_stgt_priv_data *stgt_priv_data;
     struct mpi3mr_sdev_priv_data *sdev_priv_data;
     struct scmd_priv *scmd_priv_data = NULL;
     struct mpi3_scsi_io_request *scsiio_req = NULL;
     struct op_req_qinfo *op_req_q = NULL;
     int retval = 0;
     u16 dev_handle;
     u16 host_tag;
     u32 scsiio_flags = 0, data_len_blks = 0;
     struct request *rq = scsi_cmd_to_rq(scmd);
     int iprio_class;
     u8 is_pcie_dev = 0;
     u32 tracked_io_sz = 0;
     u32 ioc_pend_data_len = 0, tg_pend_data_len = 0;
     struct mpi3mr_throttle_group_info *tg = NULL;
 
     if (mrioc->unrecoverable) {
         scmd->result = DID_ERROR << 16;
         scsi_done(scmd);
         goto out;
     }
 
     sdev_priv_data = scmd->device->hostdata;
     if (!sdev_priv_data || !sdev_priv_data->tgt_priv_data) {
         scmd->result = DID_NO_CONNECT << 16;
         scsi_done(scmd);
         goto out;
     }
 
     if (mrioc->stop_drv_processing &&
         !(mpi3mr_allow_scmd_to_fw(scmd))) {
         scmd->result = DID_NO_CONNECT << 16;
         scsi_done(scmd);
         goto out;
     }
 
     if (mrioc->reset_in_progress) {
         retval = SCSI_MLQUEUE_HOST_BUSY;
         goto out;
     }
 
     stgt_priv_data = sdev_priv_data->tgt_priv_data;
 
     dev_handle = stgt_priv_data->dev_handle;
     if (dev_handle == MPI3MR_INVALID_DEV_HANDLE) {
         scmd->result = DID_NO_CONNECT << 16;
         scsi_done(scmd);
         goto out;
     }
     if (stgt_priv_data->dev_removed) {
         scmd->result = DID_NO_CONNECT << 16;
         scsi_done(scmd);
         goto out;
     }
 
     if (atomic_read(&stgt_priv_data->block_io)) {
         if (mrioc->stop_drv_processing) {
             scmd->result = DID_NO_CONNECT << 16;
             scsi_done(scmd);
             goto out;
         }
         retval = SCSI_MLQUEUE_DEVICE_BUSY;
         goto out;
     }
 
     if (stgt_priv_data->dev_type == MPI3_DEVICE_DEVFORM_PCIE)
         is_pcie_dev = 1;
     if ((scmd->cmnd[0] == UNMAP) && is_pcie_dev &&
         (mrioc->pdev->device == MPI3_MFGPAGE_DEVID_SAS4116) &&
         mpi3mr_check_return_unmap(mrioc, scmd))
         goto out;
 
     host_tag = mpi3mr_host_tag_for_scmd(mrioc, scmd);
     if (host_tag == MPI3MR_HOSTTAG_INVALID) {
         scmd->result = DID_ERROR << 16;
         scsi_done(scmd);
         goto out;
     }
 
     if (scmd->sc_data_direction == DMA_FROM_DEVICE)
         scsiio_flags = MPI3_SCSIIO_FLAGS_DATADIRECTION_READ;
     else if (scmd->sc_data_direction == DMA_TO_DEVICE)
         scsiio_flags = MPI3_SCSIIO_FLAGS_DATADIRECTION_WRITE;
     else
         scsiio_flags = MPI3_SCSIIO_FLAGS_DATADIRECTION_NO_DATA_TRANSFER;
 
     scsiio_flags |= MPI3_SCSIIO_FLAGS_TASKATTRIBUTE_SIMPLEQ;
 
     if (sdev_priv_data->ncq_prio_enable) {
         iprio_class = IOPRIO_PRIO_CLASS(req_get_ioprio(rq));
         if (iprio_class == IOPRIO_CLASS_RT)
             scsiio_flags |= 1 << MPI3_SCSIIO_FLAGS_CMDPRI_SHIFT;
     }
 
     if (scmd->cmd_len > 16)
         scsiio_flags |= MPI3_SCSIIO_FLAGS_CDB_GREATER_THAN_16;
 
     scmd_priv_data = scsi_cmd_priv(scmd);
     memset(scmd_priv_data->mpi3mr_scsiio_req, 0, MPI3MR_ADMIN_REQ_FRAME_SZ);
     scsiio_req = (struct mpi3_scsi_io_request *)scmd_priv_data->mpi3mr_scsiio_req;
     scsiio_req->function = MPI3_FUNCTION_SCSI_IO;
     scsiio_req->host_tag = cpu_to_le16(host_tag);
 
     mpi3mr_setup_eedp(mrioc, scmd, scsiio_req);
 
     memcpy(scsiio_req->cdb.cdb32, scmd->cmnd, scmd->cmd_len);
     scsiio_req->data_length = cpu_to_le32(scsi_bufflen(scmd));
     scsiio_req->dev_handle = cpu_to_le16(dev_handle);
     scsiio_req->flags = cpu_to_le32(scsiio_flags);
     int_to_scsilun(sdev_priv_data->lun_id,
         (struct scsi_lun *)scsiio_req->lun);
 
     if (mpi3mr_build_sg_scmd(mrioc, scmd, scsiio_req)) {
         mpi3mr_clear_scmd_priv(mrioc, scmd);
         retval = SCSI_MLQUEUE_HOST_BUSY;
         goto out;
     }
     op_req_q = &mrioc->req_qinfo[scmd_priv_data->req_q_idx];
     data_len_blks = scsi_bufflen(scmd) >> 9;
     if ((data_len_blks >= mrioc->io_throttle_data_length) &&
         stgt_priv_data->io_throttle_enabled) {
         tracked_io_sz = data_len_blks;
         tg = stgt_priv_data->throttle_group;
         if (tg) {
             ioc_pend_data_len = atomic_add_return(data_len_blks,
                 &mrioc->pend_large_data_sz);
             tg_pend_data_len = atomic_add_return(data_len_blks,
                 &tg->pend_large_data_sz);
             if (!tg->io_divert  && ((ioc_pend_data_len >=
                 mrioc->io_throttle_high) ||
                 (tg_pend_data_len >= tg->high))) {
                 tg->io_divert = 1;
                 tg->need_qd_reduction = 1;
                 mpi3mr_set_io_divert_for_all_vd_in_tg(mrioc,
                     tg, 1);
                 mpi3mr_queue_qd_reduction_event(mrioc, tg);
             }
         } else {
             ioc_pend_data_len = atomic_add_return(data_len_blks,
                 &mrioc->pend_large_data_sz);
             if (ioc_pend_data_len >= mrioc->io_throttle_high)
                 stgt_priv_data->io_divert = 1;
         }
     }
 
     if (stgt_priv_data->io_divert) {
         scsiio_req->msg_flags |=
             MPI3_SCSIIO_MSGFLAGS_DIVERT_TO_FIRMWARE;
         scsiio_flags |= MPI3_SCSIIO_FLAGS_DIVERT_REASON_IO_THROTTLING;
     }
     scsiio_req->flags = cpu_to_le32(scsiio_flags);
 
     if (mpi3mr_op_request_post(mrioc, op_req_q,
         scmd_priv_data->mpi3mr_scsiio_req)) {
         mpi3mr_clear_scmd_priv(mrioc, scmd);
         retval = SCSI_MLQUEUE_HOST_BUSY;
         if (tracked_io_sz) {
             atomic_sub(tracked_io_sz, &mrioc->pend_large_data_sz);
             if (tg)
                 atomic_sub(tracked_io_sz,
                     &tg->pend_large_data_sz);
         }
         goto out;
     }
 
 out:
     return retval;
 }
 
 static struct scsi_host_template mpi3mr_driver_template = {
     .module             = THIS_MODULE,
     .name               = "MPI3 Storage Controller",
     .proc_name          = MPI3MR_DRIVER_NAME,
     .queuecommand           = mpi3mr_qcmd,
     .target_alloc           = mpi3mr_target_alloc,
     .slave_alloc            = mpi3mr_slave_alloc,
     .slave_configure        = mpi3mr_slave_configure,
     .target_destroy         = mpi3mr_target_destroy,
     .slave_destroy          = mpi3mr_slave_destroy,
     .scan_finished          = mpi3mr_scan_finished,
     .scan_start         = mpi3mr_scan_start,
     .change_queue_depth     = mpi3mr_change_queue_depth,
     .eh_device_reset_handler    = mpi3mr_eh_dev_reset,
     .eh_target_reset_handler    = mpi3mr_eh_target_reset,
     .eh_host_reset_handler      = mpi3mr_eh_host_reset,
     .bios_param         = mpi3mr_bios_param,
     .map_queues         = mpi3mr_map_queues,
     .mq_poll                        = mpi3mr_blk_mq_poll,
     .no_write_same          = 1,
     .can_queue          = 1,
     .this_id            = -1,
     .sg_tablesize           = MPI3MR_SG_DEPTH,
     /* max xfer supported is 1M (2K in 512 byte sized sectors)
      */
     .max_sectors            = 2048,
     .cmd_per_lun            = MPI3MR_MAX_CMDS_LUN,
     .max_segment_size       = 0xffffffff,
     .track_queue_depth      = 1,
     .cmd_size           = sizeof(struct scmd_priv),
     .shost_groups           = mpi3mr_host_groups,
     .sdev_groups            = mpi3mr_dev_groups,
 };
 
 /**
  * mpi3mr_init_drv_cmd - Initialize internal command tracker
  * @cmdptr: Internal command tracker
  * @host_tag: Host tag used for the specific command
  *
  * Initialize the internal command tracker structure with
  * specified host tag.
  *
  * Return: Nothing.
  */
 static inline void mpi3mr_init_drv_cmd(struct mpi3mr_drv_cmd *cmdptr,
     u16 host_tag)
 {
     mutex_init(&cmdptr->mutex);
     cmdptr->reply = NULL;
     cmdptr->state = MPI3MR_CMD_NOTUSED;
     cmdptr->dev_handle = MPI3MR_INVALID_DEV_HANDLE;
     cmdptr->host_tag = host_tag;
 }
 
 /**
  * osintfc_mrioc_security_status -Check controller secure status
  * @pdev: PCI device instance
  *
  * Read the Device Serial Number capability from PCI config
  * space and decide whether the controller is secure or not.
  *
  * Return: 0 on success, non-zero on failure.
  */
 static int
 osintfc_mrioc_security_status(struct pci_dev *pdev)
 {
     u32 cap_data;
     int base;
     u32 ctlr_status;
     u32 debug_status;
     int retval = 0;
 
     base = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_DSN);
     if (!base) {
         dev_err(&pdev->dev,
             "%s: PCI_EXT_CAP_ID_DSN is not supported\n", __func__);
         return -1;
     }
 
     pci_read_config_dword(pdev, base + 4, &cap_data);
 
     debug_status = cap_data & MPI3MR_CTLR_SECURE_DBG_STATUS_MASK;
     ctlr_status = cap_data & MPI3MR_CTLR_SECURITY_STATUS_MASK;
 
     switch (ctlr_status) {
     case MPI3MR_INVALID_DEVICE:
         dev_err(&pdev->dev,
             "%s: Non secure ctlr (Invalid) is detected: DID: 0x%x: SVID: 0x%x: SDID: 0x%x\n",
             __func__, pdev->device, pdev->subsystem_vendor,
             pdev->subsystem_device);
         retval = -1;
         break;
     case MPI3MR_CONFIG_SECURE_DEVICE:
         if (!debug_status)
             dev_info(&pdev->dev,
                 "%s: Config secure ctlr is detected\n",
                 __func__);
         break;
     case MPI3MR_HARD_SECURE_DEVICE:
         break;
     case MPI3MR_TAMPERED_DEVICE:
         dev_err(&pdev->dev,
             "%s: Non secure ctlr (Tampered) is detected: DID: 0x%x: SVID: 0x%x: SDID: 0x%x\n",
             __func__, pdev->device, pdev->subsystem_vendor,
             pdev->subsystem_device);
         retval = -1;
         break;
     default:
         retval = -1;
             break;
     }
 
     if (!retval && debug_status) {
         dev_err(&pdev->dev,
             "%s: Non secure ctlr (Secure Dbg) is detected: DID: 0x%x: SVID: 0x%x: SDID: 0x%x\n",
             __func__, pdev->device, pdev->subsystem_vendor,
             pdev->subsystem_device);
         retval = -1;
     }
 
     return retval;
 }
 
 /**
  * mpi3mr_probe - PCI probe callback
  * @pdev: PCI device instance
  * @id: PCI device ID details
  *
  * controller initialization routine. Checks the security status
  * of the controller and if it is invalid or tampered return the
  * probe without initializing the controller. Otherwise,
  * allocate per adapter instance through shost_priv and
  * initialize controller specific data structures, initializae
  * the controller hardware, add shost to the SCSI subsystem.
  *
  * Return: 0 on success, non-zero on failure.
  */
 
 static int
 mpi3mr_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 {
     struct mpi3mr_ioc *mrioc = NULL;
     struct Scsi_Host *shost = NULL;
     int retval = 0, i;
 
     if (osintfc_mrioc_security_status(pdev)) {
         warn_non_secure_ctlr = 1;
         return 1; /* For Invalid and Tampered device */
     }
 
     shost = scsi_host_alloc(&mpi3mr_driver_template,
         sizeof(struct mpi3mr_ioc));
     if (!shost) {
         retval = -ENODEV;
         goto shost_failed;
     }
 
     mrioc = shost_priv(shost);
     mrioc->id = mrioc_ids++;
     sprintf(mrioc->driver_name, "%s", MPI3MR_DRIVER_NAME);
     sprintf(mrioc->name, "%s%d", mrioc->driver_name, mrioc->id);
     INIT_LIST_HEAD(&mrioc->list);
     spin_lock(&mrioc_list_lock);
     list_add_tail(&mrioc->list, &mrioc_list);
     spin_unlock(&mrioc_list_lock);
 
     spin_lock_init(&mrioc->admin_req_lock);
     spin_lock_init(&mrioc->reply_free_queue_lock);
     spin_lock_init(&mrioc->sbq_lock);
     spin_lock_init(&mrioc->fwevt_lock);
     spin_lock_init(&mrioc->tgtdev_lock);
     spin_lock_init(&mrioc->watchdog_lock);
     spin_lock_init(&mrioc->chain_buf_lock);
 
     INIT_LIST_HEAD(&mrioc->fwevt_list);
     INIT_LIST_HEAD(&mrioc->tgtdev_list);
     INIT_LIST_HEAD(&mrioc->delayed_rmhs_list);
     INIT_LIST_HEAD(&mrioc->delayed_evtack_cmds_list);
 
     mutex_init(&mrioc->reset_mutex);
     mpi3mr_init_drv_cmd(&mrioc->init_cmds, MPI3MR_HOSTTAG_INITCMDS);
     mpi3mr_init_drv_cmd(&mrioc->host_tm_cmds, MPI3MR_HOSTTAG_BLK_TMS);
     mpi3mr_init_drv_cmd(&mrioc->bsg_cmds, MPI3MR_HOSTTAG_BSG_CMDS);
 
     for (i = 0; i < MPI3MR_NUM_DEVRMCMD; i++)
         mpi3mr_init_drv_cmd(&mrioc->dev_rmhs_cmds[i],
             MPI3MR_HOSTTAG_DEVRMCMD_MIN + i);
 
     if (pdev->revision)
         mrioc->enable_segqueue = true;
 
     init_waitqueue_head(&mrioc->reset_waitq);
     mrioc->logging_level = logging_level;
     mrioc->shost = shost;
     mrioc->pdev = pdev;
     mrioc->stop_bsgs = 1;
 
     /* init shost parameters */
     shost->max_cmd_len = MPI3MR_MAX_CDB_LENGTH;
     shost->max_lun = -1;
     shost->unique_id = mrioc->id;
 
     shost->max_channel = 0;
     shost->max_id = 0xFFFFFFFF;
 
     shost->host_tagset = 1;
 
     if (prot_mask >= 0)
         scsi_host_set_prot(shost, prot_mask);
     else {
         prot_mask = SHOST_DIF_TYPE1_PROTECTION
             | SHOST_DIF_TYPE2_PROTECTION
             | SHOST_DIF_TYPE3_PROTECTION;
         scsi_host_set_prot(shost, prot_mask);
     }
 
     ioc_info(mrioc,
         "%s :host protection capabilities enabled %s%s%s%s%s%s%s\n",
         __func__,
         (prot_mask & SHOST_DIF_TYPE1_PROTECTION) ? " DIF1" : "",
         (prot_mask & SHOST_DIF_TYPE2_PROTECTION) ? " DIF2" : "",
         (prot_mask & SHOST_DIF_TYPE3_PROTECTION) ? " DIF3" : "",
         (prot_mask & SHOST_DIX_TYPE0_PROTECTION) ? " DIX0" : "",
         (prot_mask & SHOST_DIX_TYPE1_PROTECTION) ? " DIX1" : "",
         (prot_mask & SHOST_DIX_TYPE2_PROTECTION) ? " DIX2" : "",
         (prot_mask & SHOST_DIX_TYPE3_PROTECTION) ? " DIX3" : "");
 
     if (prot_guard_mask)
         scsi_host_set_guard(shost, (prot_guard_mask & 3));
     else
         scsi_host_set_guard(shost, SHOST_DIX_GUARD_CRC);
 
     snprintf(mrioc->fwevt_worker_name, sizeof(mrioc->fwevt_worker_name),
         "%s%d_fwevt_wrkr", mrioc->driver_name, mrioc->id);
     mrioc->fwevt_worker_thread = alloc_ordered_workqueue(
         mrioc->fwevt_worker_name, 0);
     if (!mrioc->fwevt_worker_thread) {
         ioc_err(mrioc, "failure at %s:%d/%s()!\n",
             __FILE__, __LINE__, __func__);
         retval = -ENODEV;
         goto fwevtthread_failed;
     }
 
     mrioc->is_driver_loading = 1;
     mrioc->cpu_count = num_online_cpus();
     if (mpi3mr_setup_resources(mrioc)) {
         ioc_err(mrioc, "setup resources failed\n");
         retval = -ENODEV;
         goto resource_alloc_failed;
     }
     if (mpi3mr_init_ioc(mrioc)) {
         ioc_err(mrioc, "initializing IOC failed\n");
         retval = -ENODEV;
         goto init_ioc_failed;
     }
 
     shost->nr_hw_queues = mrioc->num_op_reply_q;
     if (mrioc->active_poll_qcount)
         shost->nr_maps = 3;
 
     shost->can_queue = mrioc->max_host_ios;
     shost->sg_tablesize = MPI3MR_SG_DEPTH;
     shost->max_id = mrioc->facts.max_perids + 1;
 
     retval = scsi_add_host(shost, &pdev->dev);
     if (retval) {
         ioc_err(mrioc, "failure at %s:%d/%s()!\n",
             __FILE__, __LINE__, __func__);
         goto addhost_failed;
     }
 
     scsi_scan_host(shost);
     mpi3mr_bsg_init(mrioc);
     return retval;
 
 addhost_failed:
     mpi3mr_stop_watchdog(mrioc);
     mpi3mr_cleanup_ioc(mrioc);
 init_ioc_failed:
     mpi3mr_free_mem(mrioc);
     mpi3mr_cleanup_resources(mrioc);
 resource_alloc_failed:
     destroy_workqueue(mrioc->fwevt_worker_thread);
 fwevtthread_failed:
     spin_lock(&mrioc_list_lock);
     list_del(&mrioc->list);
     spin_unlock(&mrioc_list_lock);
     scsi_host_put(shost);
 shost_failed:
     return retval;
 }
 
 /**
  * mpi3mr_remove - PCI remove callback
  * @pdev: PCI device instance
  *
  * Cleanup the IOC by issuing MUR and shutdown notification.
  * Free up all memory and resources associated with the
  * controllerand target devices, unregister the shost.
  *
  * Return: Nothing.
  */
 static void mpi3mr_remove(struct pci_dev *pdev)
 {
     struct Scsi_Host *shost = pci_get_drvdata(pdev);
     struct mpi3mr_ioc *mrioc;
     struct workqueue_struct *wq;
     unsigned long flags;
     struct mpi3mr_tgt_dev *tgtdev, *tgtdev_next;
 
     if (!shost)
         return;
 
     mrioc = shost_priv(shost);
     while (mrioc->reset_in_progress || mrioc->is_driver_loading)
         ssleep(1);
 
     mpi3mr_bsg_exit(mrioc);
     mrioc->stop_drv_processing = 1;
     mpi3mr_cleanup_fwevt_list(mrioc);
     spin_lock_irqsave(&mrioc->fwevt_lock, flags);
     wq = mrioc->fwevt_worker_thread;
     mrioc->fwevt_worker_thread = NULL;
     spin_unlock_irqrestore(&mrioc->fwevt_lock, flags);
     if (wq)
         destroy_workqueue(wq);
     scsi_remove_host(shost);
 
     list_for_each_entry_safe(tgtdev, tgtdev_next, &mrioc->tgtdev_list,
         list) {
         mpi3mr_remove_tgtdev_from_host(mrioc, tgtdev);
         mpi3mr_tgtdev_del_from_list(mrioc, tgtdev);
         mpi3mr_tgtdev_put(tgtdev);
     }
     mpi3mr_stop_watchdog(mrioc);
     mpi3mr_cleanup_ioc(mrioc);
     mpi3mr_free_mem(mrioc);
     mpi3mr_cleanup_resources(mrioc);
 
     spin_lock(&mrioc_list_lock);
     list_del(&mrioc->list);
     spin_unlock(&mrioc_list_lock);
 
     scsi_host_put(shost);
 }
 
 /**
  * mpi3mr_shutdown - PCI shutdown callback
  * @pdev: PCI device instance
  *
  * Free up all memory and resources associated with the
  * controller
  *
  * Return: Nothing.
  */
 static void mpi3mr_shutdown(struct pci_dev *pdev)
 {
     struct Scsi_Host *shost = pci_get_drvdata(pdev);
     struct mpi3mr_ioc *mrioc;
     struct workqueue_struct *wq;
     unsigned long flags;
 
     if (!shost)
         return;
 
     mrioc = shost_priv(shost);
     while (mrioc->reset_in_progress || mrioc->is_driver_loading)
         ssleep(1);
 
     mrioc->stop_drv_processing = 1;
     mpi3mr_cleanup_fwevt_list(mrioc);
     spin_lock_irqsave(&mrioc->fwevt_lock, flags);
     wq = mrioc->fwevt_worker_thread;
     mrioc->fwevt_worker_thread = NULL;
     spin_unlock_irqrestore(&mrioc->fwevt_lock, flags);
     if (wq)
         destroy_workqueue(wq);
 
     mpi3mr_stop_watchdog(mrioc);
     mpi3mr_cleanup_ioc(mrioc);
     mpi3mr_cleanup_resources(mrioc);
 }
 
 #ifdef CONFIG_PM
 /**
  * mpi3mr_suspend - PCI power management suspend callback
  * @pdev: PCI device instance
  * @state: New power state
  *
  * Change the power state to the given value and cleanup the IOC
  * by issuing MUR and shutdown notification
  *
  * Return: 0 always.
  */
 static int mpi3mr_suspend(struct pci_dev *pdev, pm_message_t state)
 {
     struct Scsi_Host *shost = pci_get_drvdata(pdev);
     struct mpi3mr_ioc *mrioc;
     pci_power_t device_state;
 
     if (!shost)
         return 0;
 
     mrioc = shost_priv(shost);
     while (mrioc->reset_in_progress || mrioc->is_driver_loading)
         ssleep(1);
     mrioc->stop_drv_processing = 1;
     mpi3mr_cleanup_fwevt_list(mrioc);
     scsi_block_requests(shost);
     mpi3mr_stop_watchdog(mrioc);
     mpi3mr_cleanup_ioc(mrioc);
 
     device_state = pci_choose_state(pdev, state);
     ioc_info(mrioc, "pdev=0x%p, slot=%s, entering operating state [D%d]\n",
         pdev, pci_name(pdev), device_state);
     pci_save_state(pdev);
     mpi3mr_cleanup_resources(mrioc);
     pci_set_power_state(pdev, device_state);
 
     return 0;
 }
 
 /**
  * mpi3mr_resume - PCI power management resume callback
  * @pdev: PCI device instance
  *
  * Restore the power state to D0 and reinitialize the controller
  * and resume I/O operations to the target devices
  *
  * Return: 0 on success, non-zero on failure
  */
 static int mpi3mr_resume(struct pci_dev *pdev)
 {
     struct Scsi_Host *shost = pci_get_drvdata(pdev);
     struct mpi3mr_ioc *mrioc;
     pci_power_t device_state = pdev->current_state;
     int r;
 
     if (!shost)
         return 0;
 
     mrioc = shost_priv(shost);
 
     ioc_info(mrioc, "pdev=0x%p, slot=%s, previous operating state [D%d]\n",
         pdev, pci_name(pdev), device_state);
     pci_set_power_state(pdev, PCI_D0);
     pci_enable_wake(pdev, PCI_D0, 0);
     pci_restore_state(pdev);
     mrioc->pdev = pdev;
     mrioc->cpu_count = num_online_cpus();
     r = mpi3mr_setup_resources(mrioc);
     if (r) {
         ioc_info(mrioc, "%s: Setup resources failed[%d]\n",
             __func__, r);
         return r;
     }
 
     mrioc->stop_drv_processing = 0;
     mpi3mr_memset_buffers(mrioc);
     r = mpi3mr_reinit_ioc(mrioc, 1);
     if (r) {
         ioc_err(mrioc, "resuming controller failed[%d]\n", r);
         return r;
     }
     scsi_unblock_requests(shost);
     mpi3mr_start_watchdog(mrioc);
 
     return 0;
 }
 #endif
 
 static const struct pci_device_id mpi3mr_pci_id_table[] = {
     {
         PCI_DEVICE_SUB(MPI3_MFGPAGE_VENDORID_BROADCOM,
             MPI3_MFGPAGE_DEVID_SAS4116, PCI_ANY_ID, PCI_ANY_ID)
     },
     { 0 }
 };
 MODULE_DEVICE_TABLE(pci, mpi3mr_pci_id_table);
 
 static struct pci_driver mpi3mr_pci_driver = {
     .name = MPI3MR_DRIVER_NAME,
     .id_table = mpi3mr_pci_id_table,
     .probe = mpi3mr_probe,
     .remove = mpi3mr_remove,
     .shutdown = mpi3mr_shutdown,
 #ifdef CONFIG_PM
     .suspend = mpi3mr_suspend,
     .resume = mpi3mr_resume,
 #endif
 };
 
 static ssize_t event_counter_show(struct device_driver *dd, char *buf)
 {
     return sprintf(buf, "%llu\n", atomic64_read(&event_counter));
 }
 static DRIVER_ATTR_RO(event_counter);
 
 static int __init mpi3mr_init(void)
 {
     int ret_val;
 
     pr_info("Loading %s version %s\n", MPI3MR_DRIVER_NAME,
         MPI3MR_DRIVER_VERSION);
 
     ret_val = pci_register_driver(&mpi3mr_pci_driver);
     if (ret_val) {
         pr_err("%s failed to load due to pci register driver failure\n",
             MPI3MR_DRIVER_NAME);
         return ret_val;
     }
 
     ret_val = driver_create_file(&mpi3mr_pci_driver.driver,
                      &driver_attr_event_counter);
     if (ret_val)
         pci_unregister_driver(&mpi3mr_pci_driver);
 
     return ret_val;
 }
 
 static void __exit mpi3mr_exit(void)
 {
     if (warn_non_secure_ctlr)
         pr_warn(
             "Unloading %s version %s while managing a non secure controller\n",
             MPI3MR_DRIVER_NAME, MPI3MR_DRIVER_VERSION);
     else
         pr_info("Unloading %s version %s\n", MPI3MR_DRIVER_NAME,
             MPI3MR_DRIVER_VERSION);
 
     driver_remove_file(&mpi3mr_pci_driver.driver,
                &driver_attr_event_counter);
     pci_unregister_driver(&mpi3mr_pci_driver);
 }
 
 module_init(mpi3mr_init);
 module_exit(mpi3mr_exit);