> Subject: Re: [PATCH v4 resend 21/23] RDMA/irdma: Add ABI definitions
>
> On Tue, Apr 06, 2021 at 07:15:00PM -0500, Shiraz Saleem wrote:
> > From: Mustafa Ismail <mustafa.ismail@xxxxxxxxx>
> >
> > Add ABI definitions for irdma.
> >
> > Signed-off-by: Mustafa Ismail <mustafa.ismail@xxxxxxxxx>
> > Signed-off-by: Shiraz Saleem <shiraz.saleem@xxxxxxxxx>
> > include/uapi/rdma/irdma-abi.h | 116
> > ++++++++++++++++++++++++++++++++++++++++++
> > 1 file changed, 116 insertions(+)
> > create mode 100644 include/uapi/rdma/irdma-abi.h
> >
> > diff --git a/include/uapi/rdma/irdma-abi.h
> > b/include/uapi/rdma/irdma-abi.h new file mode 100644 index
> > 0000000..d994b0b
> > +++ b/include/uapi/rdma/irdma-abi.h
> > @@ -0,0 +1,116 @@
> > +/* SPDX-License-Identifier: (GPL-2.0 WITH Linux-syscall-note) OR
> > +Linux-OpenIB) */
> > +/*
> > + * Copyright (c) 2006 - 2021 Intel Corporation. All rights reserved.
> > + * Copyright (c) 2005 Topspin Communications. All rights reserved.
> > + * Copyright (c) 2005 Cisco Systems. All rights reserved.
> > + * Copyright (c) 2005 Open Grid Computing, Inc. All rights reserved.
> > + */
> > +
> > +#ifndef IRDMA_ABI_H
> > +#define IRDMA_ABI_H
> > +
> > +#include <linux/types.h>
> > +
> > +/* irdma must support legacy GEN_1 i40iw kernel
> > + * and user-space whose last ABI ver is 5 */ #define IRDMA_ABI_VER 5
> > +
> > +enum irdma_memreg_type {
> > + IW_MEMREG_TYPE_MEM = 0,
> > + IW_MEMREG_TYPE_QP = 1,
> > + IW_MEMREG_TYPE_CQ = 2,
> > + IW_MEMREG_TYPE_RSVD = 3,
> > + IW_MEMREG_TYPE_MW = 4,
> > +};
> > +
> > +struct irdma_alloc_ucontext_req {
> > + __u32 rsvd32;
> > + __u8 userspace_ver;
> > + __u8 rsvd8[3];
> > +};
> > +
> > +struct irdma_alloc_ucontext_resp {
> > + __u32 max_pds;
> > + __u32 max_qps;
> > + __u32 wq_size; /* size of the WQs (SQ+RQ) in the mmaped area */
> > + __u8 kernel_ver;
> > + __u8 rsvd[3];
>
> So this reserved is to align and for compat with i40iw
>
> > + __aligned_u64 feature_flags;
> > + __aligned_u64 db_mmap_key;
> > + __u32 max_hw_wq_frags;
> > + __u32 max_hw_read_sges;
> > + __u32 max_hw_inline;
> > + __u32 max_hw_rq_quanta;
> > + __u32 max_hw_wq_quanta;
> > + __u32 min_hw_cq_size;
> > + __u32 max_hw_cq_size;
> > + __u32 rsvd1[7];
>
> But what is this for?
>
> > + __u16 max_hw_sq_chunk;
> > + __u16 rsvd2[11];
>
> And this?
>
> Reserved should only be used for alignment reasons.
Understood.
>
> You saw the other explosive thread with Intel about this topic, right?
>
> > +struct irdma_mem_reg_req {
> > + __u16 reg_type; /* Memory, QP or CQ */
>
> Comment is better to clarify this is an enum irdma_memreg_type, especially since
> it seems to be wrong?
>
> Why is that enum prefixed with IW_?
>
Will fix.
