Commit 3282f910 authored by James Bottomley's avatar James Bottomley Committed by James Bottomley

Remove dead code from 53c700

parent c1ad8867
......@@ -136,38 +136,6 @@ NCR_700_clear_flag(Scsi_Device *SDp, __u32 flag)
((unsigned long)SDp->hostdata) &= ~(flag & 0xffff0000);
}
/* These represent the Nexus hashing functions. A Nexus in SCSI terms
* just means the identification of an outstanding command, by ITL
* (Initiator Target Lun) or ITLQ (Initiator Target Lun Tag). I'm not
* very keen on XOR based hashes, so these are based on number theory
* instead. All you need to do is to fix your hash bucket size and
* then choose reasonable strides which are coprime with the chosen
* bucket size
*
* Note: this mathematical hash can be made very efficient, if the
* compiler is good at optimising: Choose the number of buckets to be
* 2^n and the modulo becomes a logical and with (2^n-1).
* Additionally, if you chose the coprimes of the form 2^n-2^n the
* multiplication can be done by a shift and an addition. */
#define MAX_ITL_HASH_BUCKETS 16
#define ITL_HASH_PRIME 7
#define MAX_ITLQ_HASH_BUCKETS 64
#define ITLQ_PUN_PRIME 7
#define ITLQ_LUN_PRIME 3
static inline int
hash_ITL(__u8 pun, __u8 lun)
{
return (pun*ITL_HASH_PRIME + lun) % MAX_ITL_HASH_BUCKETS;
}
static inline int
hash_ITLQ(__u8 pun, __u8 lun, __u8 tag)
{
return (pun*ITLQ_PUN_PRIME + lun*ITLQ_LUN_PRIME + tag) % MAX_ITLQ_HASH_BUCKETS;
}
struct NCR_700_command_slot {
struct NCR_700_SG_List SG[NCR_700_SG_SEGMENTS+1];
struct NCR_700_SG_List *pSG;
......@@ -186,12 +154,8 @@ struct NCR_700_command_slot {
/* if this command is a pci_single mapping, holds the dma address
* for later unmapping in the done routine */
dma_addr_t dma_handle;
/* Doubly linked ITL/ITLQ list kept in strict time order
* (latest at the back) */
/* historical remnant, now used to link free commands */
struct NCR_700_command_slot *ITL_forw;
struct NCR_700_command_slot *ITL_back;
struct NCR_700_command_slot *ITLQ_forw;
struct NCR_700_command_slot *ITLQ_back;
};
struct NCR_700_Host_Parameters {
......@@ -238,17 +202,6 @@ struct NCR_700_Host_Parameters {
__u8 tag_negotiated;
__u8 rev;
__u8 reselection_id;
/* flags for the host */
/* ITL list. ALL outstanding commands are hashed here in strict
* order, latest at the back */
struct NCR_700_command_slot *ITL_Hash_forw[MAX_ITL_HASH_BUCKETS];
struct NCR_700_command_slot *ITL_Hash_back[MAX_ITL_HASH_BUCKETS];
/* Only tagged outstanding commands are hashed here (also latest
* at the back) */
struct NCR_700_command_slot *ITLQ_Hash_forw[MAX_ITLQ_HASH_BUCKETS];
struct NCR_700_command_slot *ITLQ_Hash_back[MAX_ITLQ_HASH_BUCKETS];
/* Free list, singly linked by ITL_forw elements */
struct NCR_700_command_slot *free_list;
......
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