From patchwork Fri Aug 2 00:17:53 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jakub Kicinski X-Patchwork-Id: 13750946 X-Patchwork-Delegate: kuba@kernel.org Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 55BB2DF5B for ; Fri, 2 Aug 2024 00:18:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722557890; cv=none; b=fTyqcfiCm0fB10XY3w/I+KkELJvWlWPuAgaqP4wl7NL88vSve/xDyHrtcKElxaqSjsSBGbk8BFWPRUt2mHB5fZ54gQz6ylZ5KrRmT7+llz+6qWx7iT6OKglthunIcmqBqumnWT+i+y34fkPqTFeWCE2XPmHKOmnbTyoWLR2u1oQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722557890; c=relaxed/simple; bh=2JunBF0vB4eFU7NddnuafwjLPy4oIdP/0+UjFlW4E0Q=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=EVu8xbPYoiH7CWcD2uzNw6ApupThr2oHIKxhcsJ64mzJnWP4+Ac2aSVFRZIw1SGQHUjY5rL3rscPfhXdUgcRKL4U8YgSdO0PWvQyoyIO/iKN5qOPDVnGhCbZm9tW2YDhTxLIdpw4ayzJmlJXYNtFdfVr2bG3IJoov7MjnEsW6R0= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=iB7bjTTo; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="iB7bjTTo" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7563BC4AF0A; Fri, 2 Aug 2024 00:18:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1722557890; bh=2JunBF0vB4eFU7NddnuafwjLPy4oIdP/0+UjFlW4E0Q=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=iB7bjTToLi7txZtHSdMj8MyssgNXsQX7Wl1nq1UOXvC9XzeG5hzaxibqEwoip9TsQ XMoW1vbi+ECCKXu9vLL7aEeZZ46laZE0dIrtgRR0sa9G3AFAmkfsr5xvGbklAnUBN5 nmXDjy9UNEORfQ7SXT2xeQ9BW/pSvCYsj4GwUhj1tWBl1rUzvkGqHzEumAnzBEA/8K s2tk3L109ijaw0vH3yfIDLH0mSZ34xvbL0sZULM6JFeGpqXv+cSGGsChCwp/vn8FeP r9UlrrDl0pZ1N+29siAwysMtkgP5xBGwr1/dlsKZqIh3sJrkstq93EDCRdkh3DudGL 6fVlf+V/AkTlw== From: Jakub Kicinski To: davem@davemloft.net Cc: netdev@vger.kernel.org, edumazet@google.com, pabeni@redhat.com, dxu@dxuuu.xyz, ecree.xilinx@gmail.com, przemyslaw.kitszel@intel.com, donald.hunter@gmail.com, gal.pressman@linux.dev, tariqt@nvidia.com, willemdebruijn.kernel@gmail.com, Jakub Kicinski Subject: [PATCH net-next 04/12] ethtool: make ethtool_ops::cap_rss_ctx_supported optional Date: Thu, 1 Aug 2024 17:17:53 -0700 Message-ID: <20240802001801.565176-5-kuba@kernel.org> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20240802001801.565176-1-kuba@kernel.org> References: <20240802001801.565176-1-kuba@kernel.org> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Patchwork-Delegate: kuba@kernel.org cap_rss_ctx_supported was created because the API for creating and configuring additional contexts is mux'ed with the normal RSS API. Presence of ops does not imply driver can actually support rss_context != 0 (in fact drivers mostly ignore that field). cap_rss_ctx_supported lets core check that the driver is context-aware before calling it. Now that we have .create_rxfh_context, there is no such ambiguity. We can depend on presence of the op. Make setting the bit optional. Signed-off-by: Jakub Kicinski Reviewed-by: Joe Damato --- include/linux/ethtool.h | 3 ++- net/ethtool/ioctl.c | 6 ++++-- net/ethtool/rss.c | 3 ++- 3 files changed, 8 insertions(+), 4 deletions(-) diff --git a/include/linux/ethtool.h b/include/linux/ethtool.h index 303fda54ef17..55c9f613ab64 100644 --- a/include/linux/ethtool.h +++ b/include/linux/ethtool.h @@ -727,7 +727,8 @@ struct kernel_ethtool_ts_info { * @cap_link_lanes_supported: indicates if the driver supports lanes * parameter. * @cap_rss_ctx_supported: indicates if the driver supports RSS - * contexts. + * contexts via legacy API, drivers implementing @create_rxfh_context + * do not have to set this bit. * @cap_rss_sym_xor_supported: indicates if the driver supports symmetric-xor * RSS. * @rxfh_indir_space: max size of RSS indirection tables, if indirection table diff --git a/net/ethtool/ioctl.c b/net/ethtool/ioctl.c index 8ca13208d240..52dfb07393a6 100644 --- a/net/ethtool/ioctl.c +++ b/net/ethtool/ioctl.c @@ -1227,7 +1227,8 @@ static noinline_for_stack int ethtool_get_rxfh(struct net_device *dev, if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd32) return -EINVAL; /* Most drivers don't handle rss_context, check it's 0 as well */ - if (rxfh.rss_context && !ops->cap_rss_ctx_supported) + if (rxfh.rss_context && !(ops->cap_rss_ctx_supported || + ops->create_rxfh_context)) return -EOPNOTSUPP; rxfh.indir_size = rxfh_dev.indir_size; @@ -1357,7 +1358,8 @@ static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev, if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd32) return -EINVAL; /* Most drivers don't handle rss_context, check it's 0 as well */ - if (rxfh.rss_context && !ops->cap_rss_ctx_supported) + if (rxfh.rss_context && !(ops->cap_rss_ctx_supported || + ops->create_rxfh_context)) return -EOPNOTSUPP; /* Check input data transformation capabilities */ if (rxfh.input_xfrm && rxfh.input_xfrm != RXH_XFRM_SYM_XOR && diff --git a/net/ethtool/rss.c b/net/ethtool/rss.c index 5c4c4505ab9a..a06bdac8b8a2 100644 --- a/net/ethtool/rss.c +++ b/net/ethtool/rss.c @@ -60,7 +60,8 @@ rss_prepare_data(const struct ethnl_req_info *req_base, return -EOPNOTSUPP; /* Some drivers don't handle rss_context */ - if (request->rss_context && !ops->cap_rss_ctx_supported) + if (request->rss_context && !(ops->cap_rss_ctx_supported || + ops->create_rxfh_context)) return -EOPNOTSUPP; ret = ethnl_ops_begin(dev);