Re: [for-next PATCH v5 06/11] RDMA/rxe: Extend rxe packet format to support flush

[Yanjun Zhu <yanjun.zhu@linux.dev>]

在 2022/9/27 13:53, Li Zhijian 写道:
> Extend rxe opcode tables, headers, helper and constants to support
> flush operations.
> 
> Refer to the IBA A19.4.1 for more FETH definition details
> 
> Signed-off-by: Li Zhijian <lizhijian@fujitsu.com>
> ---
> V5: new FETH structure and simplify header helper
>      new names and new patch split scheme, suggested by Bob.
> ---
>   drivers/infiniband/sw/rxe/rxe_hdr.h    | 47 ++++++++++++++++++++++++++
>   drivers/infiniband/sw/rxe/rxe_opcode.c | 17 ++++++++++
>   drivers/infiniband/sw/rxe/rxe_opcode.h | 16 +++++----
>   3 files changed, 74 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/infiniband/sw/rxe/rxe_hdr.h b/drivers/infiniband/sw/rxe/rxe_hdr.h
> index e432f9e37795..e995a97c54fd 100644
> --- a/drivers/infiniband/sw/rxe/rxe_hdr.h
> +++ b/drivers/infiniband/sw/rxe/rxe_hdr.h
> @@ -607,6 +607,52 @@ static inline void reth_set_len(struct rxe_pkt_info *pkt, u32 len)
>   		rxe_opcode[pkt->opcode].offset[RXE_RETH], len);
>   }
>   
> +/******************************************************************************
> + * FLUSH Extended Transport Header
> + ******************************************************************************/
> +
> +struct rxe_feth {
> +	__be32 bits;
> +};
> +
> +#define FETH_PLT_MASK		(0x0000000f) /* bits 3-0 */
> +#define FETH_SEL_MASK		(0x00000030) /* bits 5-4 */
> +#define FETH_SEL_SHIFT		(4U)
> +
> +static inline u32 __feth_plt(void *arg)
> +{
> +	struct rxe_feth *feth = arg;
> +
> +	return be32_to_cpu(feth->bits) & FETH_PLT_MASK;
> +}
> +
> +static inline u32 __feth_sel(void *arg)
> +{
> +	struct rxe_feth *feth = arg;
> +
> +	return (be32_to_cpu(feth->bits) & FETH_SEL_MASK) >> FETH_SEL_SHIFT;
> +}
> +
> +static inline u32 feth_plt(struct rxe_pkt_info *pkt)
> +{
> +	return __feth_plt(pkt->hdr + rxe_opcode[pkt->opcode].offset[RXE_FETH]);
> +}
> +
> +static inline u32 feth_sel(struct rxe_pkt_info *pkt)
> +{
> +	return __feth_sel(pkt->hdr + rxe_opcode[pkt->opcode].offset[RXE_FETH]);
> +}
> +
> +static inline void feth_init(struct rxe_pkt_info *pkt, u8 type, u8 level)
> +{
> +	struct rxe_feth *feth = (struct rxe_feth *)
> +		    (pkt->hdr + rxe_opcode[pkt->opcode].offset[RXE_FETH]);
> +	u32 bits = ((level << FETH_SEL_SHIFT) & FETH_SEL_MASK) |
> +		   (type & FETH_PLT_MASK);
> +
> +	feth->bits = cpu_to_be32(bits);
> +}
> +
>   /******************************************************************************
>    * Atomic Extended Transport Header
>    ******************************************************************************/
> @@ -910,6 +956,7 @@ enum rxe_hdr_length {
>   	RXE_ATMETH_BYTES	= sizeof(struct rxe_atmeth),
>   	RXE_IETH_BYTES		= sizeof(struct rxe_ieth),
>   	RXE_RDETH_BYTES		= sizeof(struct rxe_rdeth),
> +	RXE_FETH_BYTES		= sizeof(struct rxe_feth),
>   };
>   
>   static inline size_t header_size(struct rxe_pkt_info *pkt)
> diff --git a/drivers/infiniband/sw/rxe/rxe_opcode.c b/drivers/infiniband/sw/rxe/rxe_opcode.c
> index d4ba4d506f17..55aad13e57bb 100644
> --- a/drivers/infiniband/sw/rxe/rxe_opcode.c
> +++ b/drivers/infiniband/sw/rxe/rxe_opcode.c
> @@ -101,6 +101,12 @@ struct rxe_wr_opcode_info rxe_wr_opcode_info[] = {
>   			[IB_QPT_UC]	= WR_LOCAL_OP_MASK,
>   		},
>   	},
> +	[IB_WR_FLUSH]					= {
> +		.name   = "IB_WR_FLUSH",
> +		.mask   = {
> +			[IB_QPT_RC]	= WR_FLUSH_MASK,
> +		},
> +	},
>   };

Hi, Zhijian

I am making tests with it. Except rc, other modes are supported? such as 
rd, xrc?

Zhu Yanjun

>   
>   struct rxe_opcode_info rxe_opcode[RXE_NUM_OPCODE] = {
> @@ -378,6 +384,17 @@ struct rxe_opcode_info rxe_opcode[RXE_NUM_OPCODE] = {
>   					  RXE_IETH_BYTES,
>   		}
>   	},
> +	[IB_OPCODE_RC_FLUSH]					= {
> +		.name	= "IB_OPCODE_RC_FLUSH",
> +		.mask	= RXE_FETH_MASK | RXE_RETH_MASK | RXE_FLUSH_MASK |
> +			  RXE_START_MASK | RXE_END_MASK | RXE_REQ_MASK,
> +		.length = RXE_BTH_BYTES + RXE_FETH_BYTES + RXE_RETH_BYTES,
> +		.offset = {
> +			[RXE_BTH]	= 0,
> +			[RXE_FETH]	= RXE_BTH_BYTES,
> +			[RXE_RETH]	= RXE_BTH_BYTES + RXE_FETH_BYTES,
> +		}
> +	},
>   
>   	/* UC */
>   	[IB_OPCODE_UC_SEND_FIRST]			= {
> diff --git a/drivers/infiniband/sw/rxe/rxe_opcode.h b/drivers/infiniband/sw/rxe/rxe_opcode.h
> index 8f9aaaf260f2..02d256745793 100644
> --- a/drivers/infiniband/sw/rxe/rxe_opcode.h
> +++ b/drivers/infiniband/sw/rxe/rxe_opcode.h
> @@ -19,7 +19,8 @@ enum rxe_wr_mask {
>   	WR_SEND_MASK			= BIT(2),
>   	WR_READ_MASK			= BIT(3),
>   	WR_WRITE_MASK			= BIT(4),
> -	WR_LOCAL_OP_MASK		= BIT(5),
> +	WR_FLUSH_MASK			= BIT(5),
> +	WR_LOCAL_OP_MASK		= BIT(6),
>   
>   	WR_READ_OR_WRITE_MASK		= WR_READ_MASK | WR_WRITE_MASK,
>   	WR_WRITE_OR_SEND_MASK		= WR_WRITE_MASK | WR_SEND_MASK,
> @@ -47,6 +48,7 @@ enum rxe_hdr_type {
>   	RXE_RDETH,
>   	RXE_DETH,
>   	RXE_IMMDT,
> +	RXE_FETH,
>   	RXE_PAYLOAD,
>   	NUM_HDR_TYPES
>   };
> @@ -63,6 +65,7 @@ enum rxe_hdr_mask {
>   	RXE_IETH_MASK		= BIT(RXE_IETH),
>   	RXE_RDETH_MASK		= BIT(RXE_RDETH),
>   	RXE_DETH_MASK		= BIT(RXE_DETH),
> +	RXE_FETH_MASK		= BIT(RXE_FETH),
>   	RXE_PAYLOAD_MASK	= BIT(RXE_PAYLOAD),
>   
>   	RXE_REQ_MASK		= BIT(NUM_HDR_TYPES + 0),
> @@ -71,13 +74,14 @@ enum rxe_hdr_mask {
>   	RXE_WRITE_MASK		= BIT(NUM_HDR_TYPES + 3),
>   	RXE_READ_MASK		= BIT(NUM_HDR_TYPES + 4),
>   	RXE_ATOMIC_MASK		= BIT(NUM_HDR_TYPES + 5),
> +	RXE_FLUSH_MASK		= BIT(NUM_HDR_TYPES + 6),
>   
> -	RXE_RWR_MASK		= BIT(NUM_HDR_TYPES + 6),
> -	RXE_COMP_MASK		= BIT(NUM_HDR_TYPES + 7),
> +	RXE_RWR_MASK		= BIT(NUM_HDR_TYPES + 7),
> +	RXE_COMP_MASK		= BIT(NUM_HDR_TYPES + 8),
>   
> -	RXE_START_MASK		= BIT(NUM_HDR_TYPES + 8),
> -	RXE_MIDDLE_MASK		= BIT(NUM_HDR_TYPES + 9),
> -	RXE_END_MASK		= BIT(NUM_HDR_TYPES + 10),
> +	RXE_START_MASK		= BIT(NUM_HDR_TYPES + 9),
> +	RXE_MIDDLE_MASK		= BIT(NUM_HDR_TYPES + 10),
> +	RXE_END_MASK		= BIT(NUM_HDR_TYPES + 11),
>   
>   	RXE_LOOPBACK_MASK	= BIT(NUM_HDR_TYPES + 12),
>