[SCSI] mpt2sas: Basic Code Cleanup in mpt2sas_base
Basic Code Cleanup: (1) _base_get_cb_idx and mpt2sas_base_free_smid were reorganized in similar fashion so the order of obtaining the cbx and smid are scsiio, hi_priority, and internal. (2) The hi_priority and internal request queue struct was made smaller by removing the scmd and chain_tracker, thus saving memory allocation. (3) For scsiio request, a new structure was created having the same elements from the former request tracker struct. Signed-off-by: Kashyap Desai <kashyap.desai@lsi.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
This commit is contained in:
Kashyap, Desai
James Bottomley
Родитель
fb396bec76
Коммит
d5bd3491c8
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@ -752,20 +752,19 @@ static u8
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_base_get_cb_idx(struct MPT2SAS_ADAPTER *ioc, u16 smid)
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{
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int i;
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u8 cb_idx = 0xFF;
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u8 cb_idx;
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if (smid >= ioc->hi_priority_smid) {
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if (smid < ioc->internal_smid) {
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i = smid - ioc->hi_priority_smid;
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cb_idx = ioc->hpr_lookup[i].cb_idx;
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} else if (smid <= ioc->hba_queue_depth) {
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i = smid - ioc->internal_smid;
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cb_idx = ioc->internal_lookup[i].cb_idx;
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}
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} else {
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if (smid < ioc->hi_priority_smid) {
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i = smid - 1;
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cb_idx = ioc->scsi_lookup[i].cb_idx;
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}
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} else if (smid < ioc->internal_smid) {
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i = smid - ioc->hi_priority_smid;
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cb_idx = ioc->hpr_lookup[i].cb_idx;
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} else if (smid <= ioc->hba_queue_depth) {
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i = smid - ioc->internal_smid;
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cb_idx = ioc->internal_lookup[i].cb_idx;
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} else
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cb_idx = 0xFF;
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return cb_idx;
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}
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@ -1430,7 +1429,7 @@ mpt2sas_base_get_smid_scsiio(struct MPT2SAS_ADAPTER *ioc, u8 cb_idx,
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struct scsi_cmnd *scmd)
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{
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unsigned long flags;
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struct request_tracker *request;
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struct scsiio_tracker *request;
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u16 smid;
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spin_lock_irqsave(&ioc->scsi_lookup_lock, flags);
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@ -1442,7 +1441,7 @@ mpt2sas_base_get_smid_scsiio(struct MPT2SAS_ADAPTER *ioc, u8 cb_idx,
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}
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request = list_entry(ioc->free_list.next,
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struct request_tracker, tracker_list);
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struct scsiio_tracker, tracker_list);
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request->scmd = scmd;
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request->cb_idx = cb_idx;
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smid = request->smid;
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@ -1496,48 +1495,47 @@ mpt2sas_base_free_smid(struct MPT2SAS_ADAPTER *ioc, u16 smid)
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struct chain_tracker *chain_req, *next;
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spin_lock_irqsave(&ioc->scsi_lookup_lock, flags);
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if (smid >= ioc->hi_priority_smid) {
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if (smid < ioc->internal_smid) {
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/* hi-priority */
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i = smid - ioc->hi_priority_smid;
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ioc->hpr_lookup[i].cb_idx = 0xFF;
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list_add_tail(&ioc->hpr_lookup[i].tracker_list,
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&ioc->hpr_free_list);
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} else {
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/* internal queue */
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i = smid - ioc->internal_smid;
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ioc->internal_lookup[i].cb_idx = 0xFF;
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list_add_tail(&ioc->internal_lookup[i].tracker_list,
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&ioc->internal_free_list);
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if (smid < ioc->hi_priority_smid) {
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/* scsiio queue */
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i = smid - 1;
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if (!list_empty(&ioc->scsi_lookup[i].chain_list)) {
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list_for_each_entry_safe(chain_req, next,
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&ioc->scsi_lookup[i].chain_list, tracker_list) {
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list_del_init(&chain_req->tracker_list);
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list_add_tail(&chain_req->tracker_list,
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&ioc->free_chain_list);
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}
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}
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ioc->scsi_lookup[i].cb_idx = 0xFF;
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ioc->scsi_lookup[i].scmd = NULL;
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list_add_tail(&ioc->scsi_lookup[i].tracker_list,
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&ioc->free_list);
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spin_unlock_irqrestore(&ioc->scsi_lookup_lock, flags);
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return;
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}
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/* scsiio queue */
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i = smid - 1;
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if (!list_empty(&ioc->scsi_lookup[i].chain_list)) {
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list_for_each_entry_safe(chain_req, next,
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&ioc->scsi_lookup[i].chain_list, tracker_list) {
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list_del_init(&chain_req->tracker_list);
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list_add_tail(&chain_req->tracker_list,
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&ioc->free_chain_list);
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/*
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* See _wait_for_commands_to_complete() call with regards
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* to this code.
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*/
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if (ioc->shost_recovery && ioc->pending_io_count) {
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if (ioc->pending_io_count == 1)
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wake_up(&ioc->reset_wq);
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ioc->pending_io_count--;
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}
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return;
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} else if (smid < ioc->internal_smid) {
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/* hi-priority */
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i = smid - ioc->hi_priority_smid;
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ioc->hpr_lookup[i].cb_idx = 0xFF;
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list_add_tail(&ioc->hpr_lookup[i].tracker_list,
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&ioc->hpr_free_list);
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} else if (smid <= ioc->hba_queue_depth) {
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/* internal queue */
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i = smid - ioc->internal_smid;
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ioc->internal_lookup[i].cb_idx = 0xFF;
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list_add_tail(&ioc->internal_lookup[i].tracker_list,
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&ioc->internal_free_list);
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}
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ioc->scsi_lookup[i].cb_idx = 0xFF;
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ioc->scsi_lookup[i].scmd = NULL;
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list_add_tail(&ioc->scsi_lookup[i].tracker_list,
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&ioc->free_list);
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spin_unlock_irqrestore(&ioc->scsi_lookup_lock, flags);
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/*
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* See _wait_for_commands_to_complete() call with regards to this code.
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*/
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if (ioc->shost_recovery && ioc->pending_io_count) {
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if (ioc->pending_io_count == 1)
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wake_up(&ioc->reset_wq);
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ioc->pending_io_count--;
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}
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}
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/**
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@ -2278,9 +2276,9 @@ _base_allocate_memory_pools(struct MPT2SAS_ADAPTER *ioc, int sleep_flag)
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ioc->name, (unsigned long long) ioc->request_dma));
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total_sz += sz;
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sz = ioc->scsiio_depth * sizeof(struct request_tracker);
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sz = ioc->scsiio_depth * sizeof(struct scsiio_tracker);
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ioc->scsi_lookup_pages = get_order(sz);
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ioc->scsi_lookup = (struct request_tracker *)__get_free_pages(
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ioc->scsi_lookup = (struct scsiio_tracker *)__get_free_pages(
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GFP_KERNEL, ioc->scsi_lookup_pages);
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if (!ioc->scsi_lookup) {
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printk(MPT2SAS_ERR_FMT "scsi_lookup: get_free_pages failed, "
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@ -101,7 +101,8 @@
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#define MPT_NAME_LENGTH 32 /* generic length of strings */
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#define MPT_STRING_LENGTH 64
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#define MPT_MAX_CALLBACKS 16
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#define MPT_MAX_CALLBACKS 16
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#define CAN_SLEEP 1
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#define NO_SLEEP 0
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@ -445,14 +446,14 @@ struct chain_tracker {
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};
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/**
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* struct request_tracker - firmware request tracker
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* struct scsiio_tracker - scsi mf request tracker
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* @smid: system message id
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* @scmd: scsi request pointer
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* @cb_idx: callback index
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* @chain_list: list of chains associated to this IO
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* @tracker_list: list of free request (ioc->free_list)
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*/
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struct request_tracker {
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struct scsiio_tracker {
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u16 smid;
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struct scsi_cmnd *scmd;
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u8 cb_idx;
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@ -460,6 +461,19 @@ struct request_tracker {
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struct list_head tracker_list;
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};
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/**
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* struct request_tracker - misc mf request tracker
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* @smid: system message id
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* @scmd: scsi request pointer
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* @cb_idx: callback index
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* @tracker_list: list of free request (ioc->free_list)
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*/
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struct request_tracker {
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u16 smid;
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u8 cb_idx;
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struct list_head tracker_list;
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};
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/**
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* struct _tr_list - target reset list
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* @handle: device handle
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@ -723,7 +737,7 @@ struct MPT2SAS_ADAPTER {
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u8 *request;
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dma_addr_t request_dma;
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u32 request_dma_sz;
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struct request_tracker *scsi_lookup;
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struct scsiio_tracker *scsi_lookup;
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ulong scsi_lookup_pages;
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spinlock_t scsi_lookup_lock;
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struct list_head free_list;
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