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[SCSI] mpt2sas: Basic Code Cleanup in mpt2sas_base

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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
2011-01-04 11:39:20 +05:30
committed by James Bottomley
parent fb396bec76
commit d5bd3491c8
2 changed files with 67 additions and 55 deletions
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22
drivers/scsi/mpt2sas/mpt2sas_base.h
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@@ -101,7 +101,8 @@
#define MPT_NAME_LENGTH 32 /* generic length of strings */
#define MPT_STRING_LENGTH 64
#define MPT_MAX_CALLBACKS 16
#define MPT_MAX_CALLBACKS 16
#define CAN_SLEEP 1
#define NO_SLEEP 0
@@ -445,14 +446,14 @@ struct chain_tracker {
};
/**
* struct request_tracker - firmware request tracker
* struct scsiio_tracker - scsi mf request tracker
* @smid: system message id
* @scmd: scsi request pointer
* @cb_idx: callback index
* @chain_list: list of chains associated to this IO
* @tracker_list: list of free request (ioc->free_list)
*/
struct request_tracker {
struct scsiio_tracker {
u16 smid;
struct scsi_cmnd *scmd;
u8 cb_idx;
@@ -460,6 +461,19 @@ struct request_tracker {
struct list_head tracker_list;
};
/**
* struct request_tracker - misc mf request tracker
* @smid: system message id
* @scmd: scsi request pointer
* @cb_idx: callback index
* @tracker_list: list of free request (ioc->free_list)
*/
struct request_tracker {
u16 smid;
u8 cb_idx;
struct list_head tracker_list;
};
/**
* struct _tr_list - target reset list
* @handle: device handle
@@ -723,7 +737,7 @@ struct MPT2SAS_ADAPTER {
u8 *request;
dma_addr_t request_dma;
u32 request_dma_sz;
struct request_tracker *scsi_lookup;
struct scsiio_tracker *scsi_lookup;
ulong scsi_lookup_pages;
spinlock_t scsi_lookup_lock;
struct list_head free_list;