[ofw] change layout of ib_send_wr for winof 2.0

[Sean Hefty]

Most applications are unchanged.  It's a simple recompile, which is necessary
for 2.0 anyway.  It avoids internal padding in the structure.

>It is a troublesome change. It will require to change most of the
>applications.
>
>> -----Original Message-----
>> From: ofw-bounces at lists.openfabrics.org
>> [mailto:ofw-bounces at lists.openfabrics.org] On Behalf Of Sean Hefty
>> Sent: Friday, May 23, 2008 9:56 PM
>> To: ofw at lists.openfabrics.org
>> Subject: [ofw] change layout of ib_send_wr for winof 2.0
>>
>> Since we're bumping the ABI/API, does anyone see any issues
>> with changing the layout of ib_send_wr?  It would end up
>> being terribly convenient if you could cast between the OFED
>> ib_send_wr and WinOF ib_send_wr, especially since the HW
>> drivers and libraries are derived from the OFED stack.  This
>> avoids translating structures in the speed path.
>>
>> For example, change from:
>>
>> typedef struct _ib_send_wr
>> {
>> 	TO_LONG_PTR(struct _ib_send_wr* ,	p_next) ;
>> 	uint64_t					wr_id;
>> 	ib_wr_type_t				wr_type;
>> 	ib_send_opt_t				send_opt;
>> 	uint32_t					num_ds;
>> 	TO_LONG_PTR(ib_local_ds_t* ,		ds_array) ;
>> 	ib_net32_t					immediate_data;
>> 	...
>>
>> to
>>
>> typedef struct _ib_send_wr
>> {
>> 	uint64_t					wr_id;
>> 	struct _ib_send_wr*			*p_next;
>> 	ib_local_ds_t				*ds_array;
>> 	uint32_t					num_ds;
>> 	ib_wr_type_t				wr_type;
>> 	ib_send_opt_t				send_opt;
>> 	ib_net32_t					immediate_data;
>> 	...
>>
>> The field names remain the same.  ULPs only need to
>> recompile.  If no one disagrees, I will do this after the
>> latest set of patches hit the trunk.
>>
>> - Sean
>>
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