From patchwork Tue Aug 18 19:44:03 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Awogbemila X-Patchwork-Id: 1347248 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming-netdev@ozlabs.org Delivered-To: patchwork-incoming-netdev@ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=google.com header.i=@google.com header.a=rsa-sha256 header.s=20161025 header.b=vFL/OGjd; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4BWLwK5MpPz9sRK for ; Wed, 19 Aug 2020 05:44:49 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726751AbgHRTos (ORCPT ); Tue, 18 Aug 2020 15:44:48 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45370 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726734AbgHRToh (ORCPT ); Tue, 18 Aug 2020 15:44:37 -0400 Received: from mail-pg1-x549.google.com (mail-pg1-x549.google.com [IPv6:2607:f8b0:4864:20::549]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C882FC061342 for ; Tue, 18 Aug 2020 12:44:36 -0700 (PDT) Received: by mail-pg1-x549.google.com with SMTP id n32so12689957pgb.22 for ; Tue, 18 Aug 2020 12:44:36 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=lkaTI5zfSAVH+ZH0FW6PbE7UwzofYRPR+OAwQ1y4D5k=; b=vFL/OGjdBTcVsfRswEGEqKJeF2Cu/NUSNxeVdPsZ0b2Q6Xa6mRt6EtdB19pFQ7KZu9 yGyZ0zyZvvJPgNGo4zKhNBpPPlAAMoi349VEpxiCRz/RjrFYUzfgl5qRUv80JmVGUvH3 kYv3bL4e694zOBUB8PyZhpkuHH3nIh5gP92dNqltd++KItjJZTfAH85NdNg1b9PghKqZ azr7U1xgKsVrZ7hZX1flF1YZSISdt43rEr+nGOQa+ykeYLtskUVzGBO/4ZW3/VCNhems V9uck0d8jY3pd8DWTvr+kLYX6a+C3EIZolZ9h7DaQC3+jT+vtj/paRlDp7MHh2GMHLwG H1zg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=lkaTI5zfSAVH+ZH0FW6PbE7UwzofYRPR+OAwQ1y4D5k=; b=SxXK/CjnZgp7TDPPSsIIJAUzfwGh4F9LNHTSzqIqYE4/wcfeeTyioRoV0408FYIDHZ HtcY0BQl6ZL+OXqtQbKGGLqGd/MjQ1ZAiKliSF+zmlSndVn3TvBYfyYzfKqao7rWCG8U AzD+LXWstw2FlqnB+g+QyfuzxmG+KcXrw4x7uDpPIfQjL5hIq/rr9icQSpt9AjgKnUUA 1nikx7nHDyB+XirHXHRKhAjJRlybmwAuzQYQLHV3SR3/w4M6q37Z7gQj5qbdWtxYrqtI VIpuht/KaN6r3kCGC15QRt9LFq5LZtZe0dKuRe5M44QtlZ0UDed+qQpvhqEb5U5QfJxN QMsg== X-Gm-Message-State: AOAM533Y9nu0eBTTr6Uw0rmE08IBx7noXXYuSVnVBx2Hsctz0v1HilEo O4m55BdYtP3phGwu9LFpP0N0//7mrvrBoDrzCS7HnI/A1k0ITygW4IqSYRQK4VS1lvQs4ZNTMMa CAgcxQjdutq134ZIlI4mNCduFii3J8GTeslAmFN5a8wJf3g4BqMZn4UmuEZgKHrvXePnyKHEF X-Google-Smtp-Source: ABdhPJwhJZf1o9iWS4hPOowT1Wk+8XHmtVPPnxWYexdtC4GzTok4fIq394PrMay080azpJIoDBHJ+Jwik0c5bULD X-Received: by 2002:aa7:99cc:: with SMTP id v12mr16392188pfi.255.1597779876113; Tue, 18 Aug 2020 12:44:36 -0700 (PDT) Date: Tue, 18 Aug 2020 12:44:03 -0700 In-Reply-To: <20200818194417.2003932-1-awogbemila@google.com> Message-Id: <20200818194417.2003932-5-awogbemila@google.com> Mime-Version: 1.0 References: <20200818194417.2003932-1-awogbemila@google.com> X-Mailer: git-send-email 2.28.0.220.ged08abb693-goog Subject: [PATCH net-next 04/18] gve: Add support for dma_mask register From: David Awogbemila To: netdev@vger.kernel.org Cc: Catherine Sullivan , Yangchun Fu , David Awogbemila Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Catherine Sullivan Add the dma_mask register and read it to set the dma_masks. gve_alloc_page will alloc_page with: GFP_DMA if priv->dma_mask is 24, GFP_DMA32 if priv->dma_mask is 32. Reviewed-by: Yangchun Fu Signed-off-by: Catherine Sullivan Signed-off-by: David Awogbemila --- drivers/net/ethernet/google/gve/gve.h | 6 ++- drivers/net/ethernet/google/gve/gve_main.c | 42 ++++++++++++------- .../net/ethernet/google/gve/gve_register.h | 3 +- 3 files changed, 34 insertions(+), 17 deletions(-) diff --git a/drivers/net/ethernet/google/gve/gve.h b/drivers/net/ethernet/google/gve/gve.h index 55b34b437764..37a3bbced36a 100644 --- a/drivers/net/ethernet/google/gve/gve.h +++ b/drivers/net/ethernet/google/gve/gve.h @@ -232,6 +232,9 @@ struct gve_priv { struct work_struct service_task; unsigned long service_task_flags; unsigned long state_flags; + + /* Gvnic device's dma mask, set during probe. */ + u8 dma_mask; }; enum gve_service_task_flags { @@ -451,8 +454,7 @@ static inline bool gve_can_recycle_pages(struct net_device *dev) } /* buffers */ -int gve_alloc_page(struct gve_priv *priv, struct device *dev, - struct page **page, dma_addr_t *dma, +int gve_alloc_page(struct gve_priv *priv, struct device *dev, struct page **page, dma_addr_t *dma, enum dma_data_direction); void gve_free_page(struct device *dev, struct page *page, dma_addr_t dma, enum dma_data_direction); diff --git a/drivers/net/ethernet/google/gve/gve_main.c b/drivers/net/ethernet/google/gve/gve_main.c index b0c1cfe44a73..449345d24f29 100644 --- a/drivers/net/ethernet/google/gve/gve_main.c +++ b/drivers/net/ethernet/google/gve/gve_main.c @@ -518,7 +518,14 @@ int gve_alloc_page(struct gve_priv *priv, struct device *dev, struct page **page, dma_addr_t *dma, enum dma_data_direction dir) { - *page = alloc_page(GFP_KERNEL); + gfp_t gfp_flags = GFP_KERNEL; + + if (priv->dma_mask == 24) + gfp_flags |= GFP_DMA; + else if (priv->dma_mask == 32) + gfp_flags |= GFP_DMA32; + + *page = alloc_page(gfp_flags); if (!*page) { priv->page_alloc_fail++; return -ENOMEM; @@ -1083,6 +1090,7 @@ static int gve_probe(struct pci_dev *pdev, const struct pci_device_id *ent) __be32 __iomem *db_bar; struct gve_registers __iomem *reg_bar; struct gve_priv *priv; + u8 dma_mask; int err; err = pci_enable_device(pdev); @@ -1095,19 +1103,6 @@ static int gve_probe(struct pci_dev *pdev, const struct pci_device_id *ent) pci_set_master(pdev); - err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64)); - if (err) { - dev_err(&pdev->dev, "Failed to set dma mask: err=%d\n", err); - goto abort_with_pci_region; - } - - err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)); - if (err) { - dev_err(&pdev->dev, - "Failed to set consistent dma mask: err=%d\n", err); - goto abort_with_pci_region; - } - reg_bar = pci_iomap(pdev, GVE_REGISTER_BAR, 0); if (!reg_bar) { dev_err(&pdev->dev, "Failed to map pci bar!\n"); @@ -1122,10 +1117,28 @@ static int gve_probe(struct pci_dev *pdev, const struct pci_device_id *ent) goto abort_with_reg_bar; } + dma_mask = readb(®_bar->dma_mask); + // Default to 64 if the register isn't set + if (!dma_mask) + dma_mask = 64; gve_write_version(®_bar->driver_version); /* Get max queues to alloc etherdev */ max_rx_queues = ioread32be(®_bar->max_tx_queues); max_tx_queues = ioread32be(®_bar->max_rx_queues); + + err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64)); + if (err) { + dev_err(&pdev->dev, "Failed to set dma mask: err=%d\n", err); + goto abort_with_reg_bar; + } + + err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)); + if (err) { + dev_err(&pdev->dev, + "Failed to set consistent dma mask: err=%d\n", err); + goto abort_with_reg_bar; + } + /* Alloc and setup the netdev and priv */ dev = alloc_etherdev_mqs(sizeof(*priv), max_tx_queues, max_rx_queues); if (!dev) { @@ -1160,6 +1173,7 @@ static int gve_probe(struct pci_dev *pdev, const struct pci_device_id *ent) priv->db_bar2 = db_bar; priv->service_task_flags = 0x0; priv->state_flags = 0x0; + priv->dma_mask = dma_mask; gve_set_probe_in_progress(priv); diff --git a/drivers/net/ethernet/google/gve/gve_register.h b/drivers/net/ethernet/google/gve/gve_register.h index 84ab8893aadd..fad8813d1bb1 100644 --- a/drivers/net/ethernet/google/gve/gve_register.h +++ b/drivers/net/ethernet/google/gve/gve_register.h @@ -16,7 +16,8 @@ struct gve_registers { __be32 adminq_pfn; __be32 adminq_doorbell; __be32 adminq_event_counter; - u8 reserved[3]; + u8 reserved[2]; + u8 dma_mask; u8 driver_version; };