From: Jason Gunthorpe <jgg@ziepe.ca>
To: Selvin Xavier <selvin.xavier@broadcom.com>
Cc: leon@kernel.org, linux-rdma@vger.kernel.org,
andrew.gospodarek@broadcom.com
Subject: Re: [PATCH for-next 6/6] RDMA/bnxt_re: Enable low latency push
Date: Tue, 11 Apr 2023 13:56:44 -0300 [thread overview]
Message-ID: <ZDWRTDx2ZVN3NXfc@ziepe.ca> (raw)
In-Reply-To: <1681125115-7127-7-git-send-email-selvin.xavier@broadcom.com>
On Mon, Apr 10, 2023 at 04:11:55AM -0700, Selvin Xavier wrote:
> Enabling the low latency push in Gen P5 adapters for small
> packets. This is supported only for the user space QPs.
> Introduce new mmap flag for write combine buffers.
> Allocate separate Write Combine pages from BAR when Low
> latency push mode is enabled in HW.
No new mmap flags.
This looks like it is basically the same as mlx5, I expect you'll run
into all the same issues and needs as mlx5 did.
Follow the modern mlx5 design, add a new API to allocate one of these
pages and have it return back the mmap cookie to use. Let userspace
allocate as many as it needs.
Jason
next prev parent reply other threads:[~2023-04-11 16:56 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-04-10 11:11 [PATCH for-next 0/6] RDMA/bnxt_re: driver update for supporting low latency push Selvin Xavier
2023-04-10 11:11 ` [PATCH for-next 1/6] RDMA/bnxt_re: Use the common mmap helper functions Selvin Xavier
2023-04-10 12:20 ` Leon Romanovsky
2023-04-11 16:53 ` Jason Gunthorpe
2023-04-12 6:49 ` Selvin Xavier
2023-04-10 11:11 ` [PATCH for-next 2/6] RDMA/bnxt_re: Add disassociate ucontext support Selvin Xavier
2023-04-10 12:27 ` Leon Romanovsky
2023-04-11 16:49 ` Jason Gunthorpe
2023-04-10 11:11 ` [PATCH for-next 3/6] RDMA/bnxt_re: Query function capabilities from firmware Selvin Xavier
2023-04-10 12:28 ` Leon Romanovsky
2023-04-10 11:11 ` [PATCH for-next 4/6] RDMA/bnxt_re: Move the interface version to chip context structure Selvin Xavier
2023-04-10 11:11 ` [PATCH for-next 5/6] RDMA/bnxt_re: Reorg the bar mapping Selvin Xavier
2023-04-10 11:11 ` [PATCH for-next 6/6] RDMA/bnxt_re: Enable low latency push Selvin Xavier
2023-04-11 16:56 ` Jason Gunthorpe [this message]
2023-04-12 5:58 ` Selvin Xavier
2023-04-10 12:32 ` [PATCH for-next 0/6] RDMA/bnxt_re: driver update for supporting " Leon Romanovsky
2023-04-11 2:29 ` Selvin Xavier
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