From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3F6C3C433DB for ; Thu, 28 Jan 2021 13:43:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DC37C64DD8 for ; Thu, 28 Jan 2021 13:43:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229695AbhA1Nmm (ORCPT ); Thu, 28 Jan 2021 08:42:42 -0500 Received: from hqnvemgate24.nvidia.com ([216.228.121.143]:3770 "EHLO hqnvemgate24.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232234AbhA1NmX (ORCPT ); Thu, 28 Jan 2021 08:42:23 -0500 Received: from hqmail.nvidia.com (Not Verified[216.228.121.13]) by hqnvemgate24.nvidia.com (using TLS: TLSv1.2, AES256-SHA) id ; Thu, 28 Jan 2021 05:41:42 -0800 Received: from HQMAIL107.nvidia.com (172.20.187.13) by HQMAIL105.nvidia.com (172.20.187.12) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Thu, 28 Jan 2021 13:41:42 +0000 Received: from vdi.nvidia.com (172.20.145.6) by mail.nvidia.com (172.20.187.13) with Microsoft SMTP Server id 15.0.1473.3 via Frontend Transport; Thu, 28 Jan 2021 13:41:40 +0000 From: Eli Cohen To: , CC: , , , , Subject: [PATCH 2/2] vdpa/mlx5: Restore the hardware used index after change map Date: Thu, 28 Jan 2021 15:41:30 +0200 Message-ID: <20210128134130.3051-3-elic@nvidia.com> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20210128134130.3051-1-elic@nvidia.com> References: <20210128134130.3051-1-elic@nvidia.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nvidia.com; s=n1; t=1611841302; bh=IFlMDEIxvzjHdYWrKcoi8vXYhv/8Yu71KrZqCZIncug=; h=From:To:CC:Subject:Date:Message-ID:X-Mailer:In-Reply-To: References:MIME-Version:Content-Transfer-Encoding:Content-Type; b=BvxHkqofYHLBx3nnZ/Il4gN/fHXyqJqrCB7fd0ksfLgQAp5P2lqsyCtngdXnRlxNM E5KXQ+W8AoA5DifxVlYN3Bp6aa+HBduqvJc2F7oLVQBzJvS6b+xwyuVLoP6ctHolrf nbzVGTjLRw6i9GQKh7uHCxK/XWKUteYu+bReucImwwp/G2mBLg9SW8M0RLhxRv16Dq tQjhu0Zswd4YkyPhgLdmsUMtTPs3GD8/LF76qpgI+TrBtJPJISriJKwJr1iLOpJUHT PcCQzBMCuF4UhHQwm5oCOmrhXKELhvBOEEvPKd5p4CVTM1mAtKniRbrD7trJbgiryv EyL5rVxFgSIxw== Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org When a change of memory map occurs, the hardware resources are destroyed and then re-created again with the new memory map. In such case, we need to restore the hardware available and used indices. The driver failed to restore the used index which is added here. Fixes 1a86b377aa21 ("vdpa/mlx5: Add VDPA driver for supported mlx5 devices"= ) Signed-off-by: Eli Cohen --- drivers/vdpa/mlx5/net/mlx5_vnet.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/vdpa/mlx5/net/mlx5_vnet.c b/drivers/vdpa/mlx5/net/mlx5= _vnet.c index 549ded074ff3..3fc8588cecae 100644 --- a/drivers/vdpa/mlx5/net/mlx5_vnet.c +++ b/drivers/vdpa/mlx5/net/mlx5_vnet.c @@ -87,6 +87,7 @@ struct mlx5_vq_restore_info { u64 device_addr; u64 driver_addr; u16 avail_index; + u16 used_index; bool ready; struct vdpa_callback cb; bool restore; @@ -121,6 +122,7 @@ struct mlx5_vdpa_virtqueue { u32 virtq_id; struct mlx5_vdpa_net *ndev; u16 avail_idx; + u16 used_idx; int fw_state; =20 /* keep last in the struct */ @@ -804,6 +806,7 @@ static int create_virtqueue(struct mlx5_vdpa_net *ndev,= struct mlx5_vdpa_virtque =20 obj_context =3D MLX5_ADDR_OF(create_virtio_net_q_in, in, obj_context); MLX5_SET(virtio_net_q_object, obj_context, hw_available_index, mvq->avail= _idx); + MLX5_SET(virtio_net_q_object, obj_context, hw_used_index, mvq->used_idx); MLX5_SET(virtio_net_q_object, obj_context, queue_feature_bit_mask_12_3, get_features_12_3(ndev->mvdev.actual_features)); vq_ctx =3D MLX5_ADDR_OF(virtio_net_q_object, obj_context, virtio_q_contex= t); @@ -1022,6 +1025,7 @@ static int connect_qps(struct mlx5_vdpa_net *ndev, st= ruct mlx5_vdpa_virtqueue *m struct mlx5_virtq_attr { u8 state; u16 available_index; + u16 used_index; }; =20 static int query_virtqueue(struct mlx5_vdpa_net *ndev, struct mlx5_vdpa_vi= rtqueue *mvq, @@ -1052,6 +1056,7 @@ static int query_virtqueue(struct mlx5_vdpa_net *ndev= , struct mlx5_vdpa_virtqueu memset(attr, 0, sizeof(*attr)); attr->state =3D MLX5_GET(virtio_net_q_object, obj_context, state); attr->available_index =3D MLX5_GET(virtio_net_q_object, obj_context, hw_a= vailable_index); + attr->used_index =3D MLX5_GET(virtio_net_q_object, obj_context, hw_used_i= ndex); kfree(out); return 0; =20 @@ -1602,6 +1607,7 @@ static int save_channel_info(struct mlx5_vdpa_net *nd= ev, struct mlx5_vdpa_virtqu return err; =20 ri->avail_index =3D attr.available_index; + ri->used_index =3D attr.used_index; ri->ready =3D mvq->ready; ri->num_ent =3D mvq->num_ent; ri->desc_addr =3D mvq->desc_addr; @@ -1646,6 +1652,7 @@ static void restore_channels_info(struct mlx5_vdpa_ne= t *ndev) continue; =20 mvq->avail_idx =3D ri->avail_index; + mvq->used_idx =3D ri->used_index; mvq->ready =3D ri->ready; mvq->num_ent =3D ri->num_ent; mvq->desc_addr =3D ri->desc_addr; --=20 2.29.2