[ofw] change layout of ib_send_wr for winof 2.0

[Leonid Keller]

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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