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Message-ID: <20240207190946.GM1297511@kernel.org>
Date: Wed, 7 Feb 2024 19:09:46 +0000
From: Simon Horman <horms@...nel.org>
To: Raju Rangoju <Raju.Rangoju@....com>
Cc: netdev@...r.kernel.org, davem@...emloft.net, edumazet@...gle.com,
kuba@...nel.org, pabeni@...hat.com, Shyam-sundar.S-k@....com,
Sudheesh Mavila <sudheesh.mavila@....com>
Subject: Re: [PATCH v4 net-next 2/2] amd-xgbe: add support for Crater
ethernet device
On Tue, Feb 06, 2024 at 02:19:00AM +0530, Raju Rangoju wrote:
> Add the necessary support to enable Crater ethernet device. Since the
> BAR1 address cannot be used to access the XPCS registers on Crater, use
> the smn functions.
>
> Some of the ethernet add-in-cards have dual PHY but share a single MDIO
> line (between the ports). In such cases, link inconsistencies are
> noticed during the heavy traffic and during reboot stress tests. Using
> smn calls helps avoid such race conditions.
>
> Suggested-by: Sudheesh Mavila <sudheesh.mavila@....com>
> Signed-off-by: Raju Rangoju <Raju.Rangoju@....com>
> ---
> drivers/net/ethernet/amd/xgbe/xgbe-common.h | 5 +
> drivers/net/ethernet/amd/xgbe/xgbe-dev.c | 57 ++++++++
> drivers/net/ethernet/amd/xgbe/xgbe-pci.c | 33 ++++-
> drivers/net/ethernet/amd/xgbe/xgbe-smn.h | 139 ++++++++++++++++++++
> drivers/net/ethernet/amd/xgbe/xgbe.h | 7 +
> 5 files changed, 240 insertions(+), 1 deletion(-)
> create mode 100644 drivers/net/ethernet/amd/xgbe/xgbe-smn.h
Hi Raju,
This patch seems to be doing a lot.
* Add support for XGBE_RN_PCI_DEVICE_ID to xgbe_pci_probe()
* Add fallback implementations of amd_smn_(write|read)()
* Add XGBE_XPCS_ACCESS_V3 support to xgbe_(read|write)_mmd_regs()
* Add XGBE_XPCS_ACCESS_V3 support to xgbe_pci_probe()
* Add support for PCI_VDEVICE(AMD, 0x1641)
So a similar theme to my comment on patch 1/1,
I wonder if it could be broken up into separate patches.
I will also say that I am surprised to see this driver using
full licence preambles rather than SPDX headers. I assume that
is due to direction from legal. And if so, I accept that you may not
be in a position to change this. But my comment stands.
...
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