0e6e741621
New ConnectX firmware introduces FW command interface revision 2, which requires that for each QP, a chunk of send queue entries (the "headroom") is kept marked as invalid, so that the HCA doesn't get confused if it prefetches entries that haven't been posted yet. Add code to the driver to do this, and also update the user ABI so that userspace can request that the prefetcher be turned off for userspace QPs (we just leave the prefetcher on for all kernel QPs). Unfortunately, marking send queue entries this way is confuses older firmware, so we change the driver to allow only FW command interface revisions 2. This means that users will have to update their firmware to work with the new driver, but the firmware is changing quickly and the old firmware has lots of other bugs anyway, so this shouldn't be too big a deal. Based on a patch from Jack Morgenstein <jackm@dev.mellanox.co.il>. Signed-off-by: Roland Dreier <rolandd@cisco.com>
96 lines
2.5 KiB
C
96 lines
2.5 KiB
C
/*
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* Copyright (c) 2007 Cisco Systems, Inc. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#ifndef MLX4_IB_USER_H
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#define MLX4_IB_USER_H
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#include <linux/types.h>
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/*
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* Increment this value if any changes that break userspace ABI
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* compatibility are made.
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*/
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#define MLX4_IB_UVERBS_ABI_VERSION 3
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/*
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* Make sure that all structs defined in this file remain laid out so
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* that they pack the same way on 32-bit and 64-bit architectures (to
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* avoid incompatibility between 32-bit userspace and 64-bit kernels).
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* In particular do not use pointer types -- pass pointers in __u64
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* instead.
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*/
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struct mlx4_ib_alloc_ucontext_resp {
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__u32 qp_tab_size;
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__u16 bf_reg_size;
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__u16 bf_regs_per_page;
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};
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struct mlx4_ib_alloc_pd_resp {
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__u32 pdn;
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__u32 reserved;
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};
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struct mlx4_ib_create_cq {
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__u64 buf_addr;
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__u64 db_addr;
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};
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struct mlx4_ib_create_cq_resp {
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__u32 cqn;
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__u32 reserved;
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};
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struct mlx4_ib_resize_cq {
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__u64 buf_addr;
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};
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struct mlx4_ib_create_srq {
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__u64 buf_addr;
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__u64 db_addr;
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};
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struct mlx4_ib_create_srq_resp {
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__u32 srqn;
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__u32 reserved;
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};
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struct mlx4_ib_create_qp {
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__u64 buf_addr;
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__u64 db_addr;
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__u8 log_sq_bb_count;
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__u8 log_sq_stride;
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__u8 sq_no_prefetch;
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__u8 reserved[5];
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};
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#endif /* MLX4_IB_USER_H */
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