From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pg1-f198.google.com (mail-pg1-f198.google.com [209.85.215.198]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8437B3955DE for ; Wed, 9 Sep 2026 19:11:40 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.215.198 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788981104; cv=none; b=oHY2uHtwZG+xI/mAoZokE1RARkBEYbhUWyvxFK7ZX8X9fn17jUy/dxBQN+j5voPvYGzBOhg1/Ir86mXv1OvRr2u1BMZBph+EssS0KybUasI2L+um87w4x8hRZZUhHJItNGiCJppmQq8Z8KRhRodD4R/zI9PvmXq6cOzKuIDG97s= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788981104; c=relaxed/simple; bh=o6PEpf9iueRpeImtmoU20oIzP3f9GoKFTCn0cL8DKgk=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=dVoqcrEnV9cCMxnu5ESRQOnMHJNMpomSVs1AcchwXG1Df0uayt9rJzfOCn+ps/QkYFjXjxzypxphPsKrXI4+lLe8cr11HUUUZMpUEP4YNslSETHRXnPzucbyZo/NTD5/exASVd82nKHqAvM1nlRDzhbHyHgM0ecmVJfW+NcypnQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--hramamurthy.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=KEelK4K8; arc=none smtp.client-ip=209.85.215.198 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--hramamurthy.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="KEelK4K8" Received: by mail-pg1-f198.google.com with SMTP id 41be03b00d2f7-cc1eb205d31so4540520a12.2 for ; Wed, 09 Sep 2026 12:11:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1788981099; x=1789585899; darn=vger.kernel.org; h=content-type:cc:to:from:subject:message-id:references:mime-version :in-reply-to:date:from:to:cc:subject:date:message-id:reply-to :content-type; bh=gOdWomF6r1HDhUcNAETqEcDHfk68Z04Jfg74hH3MYtE=; b=KEelK4K8EQ68TQFeXInaDnClbVFeYtVXVSD3zmN+u6qCKHuJWZ8fP8iMU8PRNnZxkY aUX4N6J6RVTwwgyI2cc8gAHsLnbUFB3SmWLPZLbeysSZR+RVIZhN8P+LumtFGI9N1+gA 89VThQmaPs2ceSbDSKi84KvG+R1iEIWR+LFRAsuQiXOWdOBNeBE4dxDAD5/WvssvAiWK FtYwHizRxImzUBPdLyVy+ehLtvzGB4fpx2sVH0z9Xy8SS/6EeM661rsggeC5QpyjqJEF oxJ3JHkXBsSseU44CC7EbwaGYQQ8GXfOnqm9xPGCdujmqLNpy9ESxjerAA5Q4yBYm7KK L+Tg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1788981099; x=1789585899; h=content-type:cc:to:from:subject:message-id:references:mime-version :in-reply-to:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to:content-type; bh=gOdWomF6r1HDhUcNAETqEcDHfk68Z04Jfg74hH3MYtE=; b=FsjlTyhROgqsveYfqC9RiPQDJYXUQ1Oq7stekiHB9K6Zz/rWltVFCFfSoTF2sCKLWm 8tV9RV31PPZxHQK36JqFGsZ3SmVB2e534TiKygO85T37Oo0Hl0ZtWo0lcAs1QUu0qsWQ WLSvamgN2nEuDzwmR6fqOx64W2pC7sTyIziWmdnkcCd5hfuxzLM4IiTMewHnddX6q/UY yC/bpfi5O1erW/vUdtwqcAl7WAc8Q/e6Ts0Q0bii2WRN0eu0bxxo+7M5Xm7J18fHbLXa BTfpVZT6K/ubQGNxJA3gekC1nZEonCHbxZO3drWE7x5j/SrzQpvhjQM+EqHl1JmLmeP5 4enw== X-Forwarded-Encrypted: i=1; AKwUvByqyHfwkWBddU/TLdjIKx52ltsYZcdvlGY15pJSdbGHgzlS7V7F0VRlipwako/tnAsTjEQ=@vger.kernel.org X-Gm-Message-State: AFuF++m8+t8KmDKY/d+FcOZZ+oTRGGsnmTRPb52R+cDU+Pjf+8ajAx8D r8GnqVd8iPVnuIN877ArGtjCHbyy7qyW+oEvyhEpx6liuIC0aqJJlZik1+1tQXqDzlnVyoXEeJE v7GffS1CKkbSAPtU746n4YiVTwg== X-Received: from pgbj10-n2.prod.google.com ([2002:a05:6a02:61ca:20b0:cc4:32ab:3366]) (user=hramamurthy job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6a20:6f8c:b0:3d3:ae0f:5269 with SMTP id adf61e73a8af0-3da3a15c001mr57860380637.21.1788981099108; Wed, 09 Sep 2026 12:11:39 -0700 (PDT) Date: Wed, 9 Sep 2026 19:11:25 +0000 In-Reply-To: <20260909191136.3811892-1-hramamurthy@google.com> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260909191136.3811892-1-hramamurthy@google.com> X-Mailer: git-send-email 2.55.0.1003.g10538fe699-goog Message-ID: <20260909191136.3811892-3-hramamurthy@google.com> Subject: [PATCH net-next v6 02/12] gve: introduce control plane operations structure From: Harshitha Ramamurthy To: netdev@vger.kernel.org Cc: joshwash@google.com, hramamurthy@google.com, andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, ast@kernel.org, daniel@iogearbox.net, hawk@kernel.org, john.fastabend@gmail.com, sdf@fomichev.me, jordanrhee@google.com, willemb@google.com, nktgrg@google.com, maolson@google.com, thostet@google.com, jacob.e.keller@intel.com, debarghyak@google.com, kees@kernel.org, bpf@vger.kernel.org, linux-kernel@vger.kernel.org, przemyslaw.kitszel@intel.com Content-Type: text/plain; charset="UTF-8" To abstract out the difference in implementation of control plane operations between the existing Adminq ABI and the upcoming Mailbox ABI, introduce a new gve_ctrl_ops structure which will contain the basic operations. At probe, these ops will be set based on the ABI and the corresponding ops will be called in relevant places. As of this patch, only Adminq ops are set. In future patches, corresponding ops will be set for the new mailbox mode. Implement a ctrl op to map/unmap the doorbell bar. Since this functionality has moved to a control op, call this op after control ops are set for AdminQ mode. Reviewed-by: Willem de Bruijn Reviewed-by: Jordan Rhee Reviewed-by: Przemek Kitszel Signed-off-by: Harshitha Ramamurthy --- v6: - plumb through map_db_bar error instead of overwriting it drivers/net/ethernet/google/gve/gve.h | 11 +++++++ drivers/net/ethernet/google/gve/gve_adminq.c | 21 ++++++++++++ drivers/net/ethernet/google/gve/gve_adminq.h | 2 ++ drivers/net/ethernet/google/gve/gve_main.c | 34 +++++++++++--------- 4 files changed, 52 insertions(+), 16 deletions(-) diff --git a/drivers/net/ethernet/google/gve/gve.h b/drivers/net/ethernet/google/gve/gve.h index 021adb9108df..56148ea3cfbf 100644 --- a/drivers/net/ethernet/google/gve/gve.h +++ b/drivers/net/ethernet/google/gve/gve.h @@ -825,6 +825,16 @@ struct gve_device_info { bool cache_rss_config; }; +/** + * struct gve_ctrl_ops - Control plane operations structure + * @map_db_bar: Maps the doorbell BAR for the device and store in @priv. + * @unmap_db_bar: Unmaps the doorbell BAR previously mapped by @map_db_bar. + */ +struct gve_ctrl_ops { + int (*map_db_bar)(struct gve_priv *priv); + void (*unmap_db_bar)(struct gve_priv *priv); +}; + struct gve_priv { struct net_device *dev; struct gve_tx_ring *tx; /* array of tx_cfg.num_queues */ @@ -958,6 +968,7 @@ struct gve_priv { dma_addr_t nic_ts_report_bus; u64 last_sync_nic_counter; /* Clock counter from last NIC TS report */ struct gve_device_info device_info; + const struct gve_ctrl_ops *ctrl_ops; }; enum gve_service_task_flags_bit { diff --git a/drivers/net/ethernet/google/gve/gve_adminq.c b/drivers/net/ethernet/google/gve/gve_adminq.c index 512349c5517f..08d8e49d563e 100644 --- a/drivers/net/ethernet/google/gve/gve_adminq.c +++ b/drivers/net/ethernet/google/gve/gve_adminq.c @@ -1637,3 +1637,24 @@ void gve_set_num_queues(struct gve_priv *priv) device_info->default_rx_queues, priv->rx_cfg.num_queues); } + +int gve_adminq_map_db_bar(struct gve_priv *priv) +{ + struct pci_dev *pdev = priv->pdev; + void __iomem *db_bar; + + db_bar = pci_iomap(pdev, GVE_DOORBELL_BAR, 0); + if (!db_bar) { + dev_err(&pdev->dev, "Failed to map doorbell bar!\n"); + return -ENOMEM; + } + priv->db_bar2 = db_bar; + return 0; +} + +void gve_adminq_unmap_db_bar(struct gve_priv *priv) +{ + struct pci_dev *pdev = priv->pdev; + + pci_iounmap(pdev, priv->db_bar2); +} diff --git a/drivers/net/ethernet/google/gve/gve_adminq.h b/drivers/net/ethernet/google/gve/gve_adminq.h index a17af755b454..93d3cabb67f1 100644 --- a/drivers/net/ethernet/google/gve/gve_adminq.h +++ b/drivers/net/ethernet/google/gve/gve_adminq.h @@ -658,4 +658,6 @@ int gve_adminq_get_ptype_map_dqo(struct gve_priv *priv, struct gve_ptype_lut *ptype_lut); int gve_set_num_ntfy_blks(struct gve_priv *priv); void gve_set_num_queues(struct gve_priv *priv); +int gve_adminq_map_db_bar(struct gve_priv *priv); +void gve_adminq_unmap_db_bar(struct gve_priv *priv); #endif /* _GVE_ADMINQ_H */ diff --git a/drivers/net/ethernet/google/gve/gve_main.c b/drivers/net/ethernet/google/gve/gve_main.c index d3882de584e3..d721347e54b4 100644 --- a/drivers/net/ethernet/google/gve/gve_main.c +++ b/drivers/net/ethernet/google/gve/gve_main.c @@ -2460,6 +2460,11 @@ static void gve_set_buf_sizes(struct gve_priv *priv) priv->header_buf_size = device_info->header_buf_size; } +static const struct gve_ctrl_ops gve_adminq_ops = { + .map_db_bar = gve_adminq_map_db_bar, + .unmap_db_bar = gve_adminq_unmap_db_bar, +}; + static int gve_init_priv(struct gve_priv *priv, bool skip_describe_device) { struct gve_device_info *device_info = &priv->device_info; @@ -2861,7 +2866,6 @@ static int gve_probe(struct pci_dev *pdev, const struct pci_device_id *ent) { int max_tx_queues, max_rx_queues; struct net_device *dev; - __be32 __iomem *db_bar; struct gve_registers __iomem *reg_bar; struct gve_priv *priv; int err; @@ -2889,13 +2893,6 @@ static int gve_probe(struct pci_dev *pdev, const struct pci_device_id *ent) goto abort_with_pci_region; } - db_bar = pci_iomap(pdev, GVE_DOORBELL_BAR, 0); - if (!db_bar) { - dev_err(&pdev->dev, "Failed to map doorbell bar!\n"); - err = -ENOMEM; - goto abort_with_reg_bar; - } - gve_write_version(®_bar->driver_version); /* Get max queues to alloc etherdev */ max_tx_queues = ioread32be(®_bar->max_tx_queues); @@ -2905,7 +2902,7 @@ static int gve_probe(struct pci_dev *pdev, const struct pci_device_id *ent) if (!dev) { dev_err(&pdev->dev, "could not allocate netdev\n"); err = -ENOMEM; - goto abort_with_db_bar; + goto abort_with_reg_bar; } SET_NETDEV_DEV(dev, &pdev->dev); pci_set_drvdata(pdev, dev); @@ -2937,19 +2934,25 @@ static int gve_probe(struct pci_dev *pdev, const struct pci_device_id *ent) priv->pdev = pdev; priv->msg_enable = DEFAULT_MSG_LEVEL; priv->reg_bar0 = reg_bar; - priv->db_bar2 = db_bar; priv->service_task_flags = 0x0; priv->state_flags = 0x0; priv->ethtool_flags = 0x0; priv->rx_cfg.packet_buffer_size = GVE_DEFAULT_RX_BUFFER_SIZE; priv->max_rx_buffer_size = GVE_DEFAULT_RX_BUFFER_SIZE; + /* Set adminq ctrl ops */ + priv->ctrl_ops = &gve_adminq_ops; + + err = priv->ctrl_ops->map_db_bar(priv); + if (err) + goto abort_with_netdev; + gve_set_probe_in_progress(priv); priv->gve_wq = alloc_ordered_workqueue("gve", 0); if (!priv->gve_wq) { dev_err(&pdev->dev, "Could not allocate workqueue"); err = -ENOMEM; - goto abort_with_netdev; + goto abort_with_unmap_db_bar; } INIT_WORK(&priv->service_task, gve_service_task); INIT_WORK(&priv->stats_report_task, gve_stats_report_task); @@ -2979,12 +2982,12 @@ static int gve_probe(struct pci_dev *pdev, const struct pci_device_id *ent) abort_with_wq: destroy_workqueue(priv->gve_wq); +abort_with_unmap_db_bar: + priv->ctrl_ops->unmap_db_bar(priv); + abort_with_netdev: free_netdev(dev); -abort_with_db_bar: - pci_iounmap(pdev, db_bar); - abort_with_reg_bar: pci_iounmap(pdev, reg_bar); @@ -3000,14 +3003,13 @@ static void gve_remove(struct pci_dev *pdev) { struct net_device *netdev = pci_get_drvdata(pdev); struct gve_priv *priv = netdev_priv(netdev); - __be32 __iomem *db_bar = priv->db_bar2; void __iomem *reg_bar = priv->reg_bar0; unregister_netdev(netdev); gve_teardown_priv_resources(priv); destroy_workqueue(priv->gve_wq); + priv->ctrl_ops->unmap_db_bar(priv); free_netdev(netdev); - pci_iounmap(pdev, db_bar); pci_iounmap(pdev, reg_bar); pci_release_regions(pdev); pci_disable_device(pdev); -- 2.55.0.979.g7e5102b832-goog