From patchwork Wed Apr 3 20:08:33 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexander Duyck X-Patchwork-Id: 13616629 X-Patchwork-Delegate: kuba@kernel.org Received: from mail-pl1-f177.google.com (mail-pl1-f177.google.com [209.85.214.177]) (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 5AA3456B70 for ; Wed, 3 Apr 2024 20:08:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.177 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712174918; cv=none; b=GqC4KIBvKObwcBLYygjXVQL24PMl3jV5WO+1GNsJF+HVM+jAciEDpUgKjRYIUI309nefL/Frc0QYwibaB5yN9nBAMoJhzJ1GPMNYd0oW6opriRxpmLIUQjGgGgoCEDVrF8fx6CLgIlAhc2GkC2+W3UjdAZ4mscDDAAUOdtd1rGs= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712174918; c=relaxed/simple; bh=vs9rY9utHA3S6f2lTLj+Vd9VjkDK1FD7dTigB+veahA=; h=Subject:From:To:Cc:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=jjMIVta9uEW+tsfdQSIUsF/pcsU6VHuu2211x9XVoWqzfVhJvXzRSQJtAd90iddXM6GBLHScJ4WzmDZsQWCBlyqCixgKDqQ0VK2r2tgd/dtwhXv3NmQZNHlxwLxrx9xm0VQNWwoNR0bJ74XsUpMp0M2SOKxq2xsS4cyI4vId574= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=MWRBh6x9; arc=none smtp.client-ip=209.85.214.177 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="MWRBh6x9" Received: by mail-pl1-f177.google.com with SMTP id d9443c01a7336-1e28be94d32so1770045ad.0 for ; Wed, 03 Apr 2024 13:08:36 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1712174916; x=1712779716; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:user-agent:references :in-reply-to:message-id:date:cc:to:from:subject:from:to:cc:subject :date:message-id:reply-to; bh=CHzxQHK9Lqcog8W42sHoq7id1vDuaRjkicBhWkJ+UbY=; b=MWRBh6x9ZtakQDWvmHB7SL0Vm4bushKmLHu1LMojw6Dxt+12EqVIqU/V3IK1YCDVjw P0QmUSt3tnK82W4gv/b1z5DXQWOFKZPS+NRihNaaSfDpSWzF+JTOmvyl6xyHAAoa6izR 0q3m4MHxajCMjc91U0nc/R0ALv5wPKTj3SF+xZnWQAlNHQVt3CwCENcR+8eihgV6vQgY /3KOu3eUA8RLs2xJ2ygyFeHVDJkyoQGOD/LO4Aqz0pJhNRmmWSK6gwWCr0jUlaGAKxPf hbyfnnufnIniKJA3W73xanAVYtgUmeYThMkxHaRwgxVPxjvfgxIe4+EH7g3lSfLrdRvV GLAQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1712174916; x=1712779716; h=content-transfer-encoding:mime-version:user-agent:references :in-reply-to:message-id:date:cc:to:from:subject:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=CHzxQHK9Lqcog8W42sHoq7id1vDuaRjkicBhWkJ+UbY=; b=h3IH59jJVACUgg6xeMEUyIsP0wcBPqnVPu8MERpp+XUkr4Q+HG6aT1eLiQA2NX9IuI PALfUzKEA9rwsLfrjMMdqoss19BWbR/zXBWxG6zTBCSFFq7OhmRCKOQtXbDRLt8CamPi kPVbOgUjC/dcvFfNLCjfEeAjElQHtneLjUxPJiX3OOPQu7YljLAlflKtz8vMJHcz9TLt oI3p1VHlUu2Cpp6YXQ06nW2Br0xFI2xpkIo5hn+F7FxJ2BieEpVv2DShpo31w2qelQyR b2SjMafZmIrEo8QwLUHQy0Gy/JrRG5G9YSu/gUMLHH8SFxEL9pO9ZQBATZL2t6Eb0vna JuLQ== X-Gm-Message-State: AOJu0Yx6wf5Ujw2/IMzjTYnJxSQTbmozx+KhWMkbu/anbBct7cvgs2Ol GyRGYYn7nBGPA8/ZeeZNsStSzhzqHZEM/00uoHjWsKFCKurhwesg X-Google-Smtp-Source: AGHT+IG9FevuM4B+cUZCFlYpok8DJksTB+l+tjEmMUsYzpf99KtVi2k/N5kdBDoEbLX95zu+UXIptw== X-Received: by 2002:a17:902:db10:b0:1e0:a8b8:aba3 with SMTP id m16-20020a170902db1000b001e0a8b8aba3mr404309plx.35.1712174915458; Wed, 03 Apr 2024 13:08:35 -0700 (PDT) Received: from ahduyck-xeon-server.home.arpa ([98.97.103.43]) by smtp.gmail.com with ESMTPSA id u1-20020a170902e5c100b001e20574bacesm13765591plf.83.2024.04.03.13.08.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 03 Apr 2024 13:08:34 -0700 (PDT) Subject: [net-next PATCH 02/15] eth: fbnic: add scaffolding for Meta's NIC driver From: Alexander Duyck To: netdev@vger.kernel.org Cc: Alexander Duyck , kuba@kernel.org, davem@davemloft.net, pabeni@redhat.com Date: Wed, 03 Apr 2024 13:08:33 -0700 Message-ID: <171217491384.1598374.15535514527169847181.stgit@ahduyck-xeon-server.home.arpa> In-Reply-To: <171217454226.1598374.8971335637623132496.stgit@ahduyck-xeon-server.home.arpa> References: <171217454226.1598374.8971335637623132496.stgit@ahduyck-xeon-server.home.arpa> User-Agent: StGit/1.5 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 From: Alexander Duyck Create a bare-bones PCI driver for Meta's NIC. Subsequent changes will flesh it out. Signed-off-by: Alexander Duyck --- MAINTAINERS | 7 + drivers/net/ethernet/Kconfig | 1 drivers/net/ethernet/Makefile | 1 drivers/net/ethernet/meta/Kconfig | 29 +++ drivers/net/ethernet/meta/Makefile | 6 + drivers/net/ethernet/meta/fbnic/Makefile | 10 + drivers/net/ethernet/meta/fbnic/fbnic.h | 19 ++ drivers/net/ethernet/meta/fbnic/fbnic_csr.h | 9 + drivers/net/ethernet/meta/fbnic/fbnic_drvinfo.h | 5 + drivers/net/ethernet/meta/fbnic/fbnic_pci.c | 196 +++++++++++++++++++++++ 10 files changed, 283 insertions(+) create mode 100644 drivers/net/ethernet/meta/Kconfig create mode 100644 drivers/net/ethernet/meta/Makefile create mode 100644 drivers/net/ethernet/meta/fbnic/Makefile create mode 100644 drivers/net/ethernet/meta/fbnic/fbnic.h create mode 100644 drivers/net/ethernet/meta/fbnic/fbnic_csr.h create mode 100644 drivers/net/ethernet/meta/fbnic/fbnic_drvinfo.h create mode 100644 drivers/net/ethernet/meta/fbnic/fbnic_pci.c diff --git a/MAINTAINERS b/MAINTAINERS index 6a233e1a3cf2..77efffbd23f9 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -14307,6 +14307,13 @@ T: git git://linuxtv.org/media_tree.git F: Documentation/devicetree/bindings/media/amlogic,gx-vdec.yaml F: drivers/staging/media/meson/vdec/ +META ETHERNET DRIVERS +M: Alexander Duyck +M: Jakub Kicinski +R: kernel-team@meta.com +S: Maintained +F: drivers/net/ethernet/meta/ + METHODE UDPU SUPPORT M: Robert Marko S: Maintained diff --git a/drivers/net/ethernet/Kconfig b/drivers/net/ethernet/Kconfig index 6a19b5393ed1..0baac25db4f8 100644 --- a/drivers/net/ethernet/Kconfig +++ b/drivers/net/ethernet/Kconfig @@ -122,6 +122,7 @@ source "drivers/net/ethernet/litex/Kconfig" source "drivers/net/ethernet/marvell/Kconfig" source "drivers/net/ethernet/mediatek/Kconfig" source "drivers/net/ethernet/mellanox/Kconfig" +source "drivers/net/ethernet/meta/Kconfig" source "drivers/net/ethernet/micrel/Kconfig" source "drivers/net/ethernet/microchip/Kconfig" source "drivers/net/ethernet/mscc/Kconfig" diff --git a/drivers/net/ethernet/Makefile b/drivers/net/ethernet/Makefile index 0d872d4efcd1..c03203439c0e 100644 --- a/drivers/net/ethernet/Makefile +++ b/drivers/net/ethernet/Makefile @@ -59,6 +59,7 @@ obj-$(CONFIG_NET_VENDOR_LITEX) += litex/ obj-$(CONFIG_NET_VENDOR_MARVELL) += marvell/ obj-$(CONFIG_NET_VENDOR_MEDIATEK) += mediatek/ obj-$(CONFIG_NET_VENDOR_MELLANOX) += mellanox/ +obj-$(CONFIG_NET_VENDOR_META) += meta/ obj-$(CONFIG_NET_VENDOR_MICREL) += micrel/ obj-$(CONFIG_NET_VENDOR_MICROCHIP) += microchip/ obj-$(CONFIG_NET_VENDOR_MICROSEMI) += mscc/ diff --git a/drivers/net/ethernet/meta/Kconfig b/drivers/net/ethernet/meta/Kconfig new file mode 100644 index 000000000000..8949ab15a02e --- /dev/null +++ b/drivers/net/ethernet/meta/Kconfig @@ -0,0 +1,29 @@ +# SPDX-License-Identifier: GPL-2.0-only +# +# Meta Platforms network device configuration +# + +config NET_VENDOR_META + bool "Meta Platforms devices" + default y + help + If you have a network (Ethernet) card designed by Meta, say Y. + That's Meta as in the parent company of Facebook. + + Note that the answer to this question doesn't directly affect the + kernel: saying N will just cause the configurator to skip all + the questions about Meta cards. If you say Y, you will be asked for + your specific card in the following questions. + +if NET_VENDOR_META + +config FBNIC + tristate "Meta Platforms Host Network Interface" + depends on PCI_MSI + help + This driver supports Meta Platforms Host Network Interface. + + To compile this driver as a module, choose M here. The module + will be called fbnic. MSI-X interrupt support is required. + +endif # NET_VENDOR_META diff --git a/drivers/net/ethernet/meta/Makefile b/drivers/net/ethernet/meta/Makefile new file mode 100644 index 000000000000..88804f3de963 --- /dev/null +++ b/drivers/net/ethernet/meta/Makefile @@ -0,0 +1,6 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Makefile for the Meta Platforms network device drivers. +# + +obj-$(CONFIG_FBNIC) += fbnic/ diff --git a/drivers/net/ethernet/meta/fbnic/Makefile b/drivers/net/ethernet/meta/fbnic/Makefile new file mode 100644 index 000000000000..ce277fec875f --- /dev/null +++ b/drivers/net/ethernet/meta/fbnic/Makefile @@ -0,0 +1,10 @@ +# SPDX-License-Identifier: GPL-2.0 +# Copyright (c) Meta Platforms, Inc. and affiliates. + +# +# Makefile for the Meta(R) Host Network Interface +# + +obj-$(CONFIG_FBNIC) += fbnic.o + +fbnic-y := fbnic_pci.o diff --git a/drivers/net/ethernet/meta/fbnic/fbnic.h b/drivers/net/ethernet/meta/fbnic/fbnic.h new file mode 100644 index 000000000000..25702dab8d66 --- /dev/null +++ b/drivers/net/ethernet/meta/fbnic/fbnic.h @@ -0,0 +1,19 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright (c) Meta Platforms, Inc. and affiliates. */ + +#ifndef _FBNIC_H_ +#define _FBNIC_H_ + +#include "fbnic_csr.h" + +extern char fbnic_driver_name[]; + +enum fbnic_boards { + fbnic_board_asic +}; + +struct fbnic_info { + unsigned int bar_mask; +}; + +#endif /* _FBNIC_H_ */ diff --git a/drivers/net/ethernet/meta/fbnic/fbnic_csr.h b/drivers/net/ethernet/meta/fbnic/fbnic_csr.h new file mode 100644 index 000000000000..72e89c07bf54 --- /dev/null +++ b/drivers/net/ethernet/meta/fbnic/fbnic_csr.h @@ -0,0 +1,9 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright (c) Meta Platforms, Inc. and affiliates. */ + +#ifndef _FBNIC_CSR_H_ +#define _FBNIC_CSR_H_ + +#define PCI_DEVICE_ID_META_FBNIC_ASIC 0x0013 + +#endif /* _FBNIC_CSR_H_ */ diff --git a/drivers/net/ethernet/meta/fbnic/fbnic_drvinfo.h b/drivers/net/ethernet/meta/fbnic/fbnic_drvinfo.h new file mode 100644 index 000000000000..809ba6729442 --- /dev/null +++ b/drivers/net/ethernet/meta/fbnic/fbnic_drvinfo.h @@ -0,0 +1,5 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright (c) Meta Platforms, Inc. and affiliates. */ + +#define DRV_NAME "fbnic" +#define DRV_SUMMARY "Meta(R) Host Network Interface Driver" diff --git a/drivers/net/ethernet/meta/fbnic/fbnic_pci.c b/drivers/net/ethernet/meta/fbnic/fbnic_pci.c new file mode 100644 index 000000000000..1cb71cb1de14 --- /dev/null +++ b/drivers/net/ethernet/meta/fbnic/fbnic_pci.c @@ -0,0 +1,196 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) Meta Platforms, Inc. and affiliates. */ + +#include +#include +#include +#include + +#include "fbnic.h" +#include "fbnic_drvinfo.h" + +char fbnic_driver_name[] = DRV_NAME; + +MODULE_DESCRIPTION(DRV_SUMMARY); +MODULE_LICENSE("GPL"); + +static const struct fbnic_info fbnic_asic_info = { + .bar_mask = BIT(0) | BIT(4) +}; + +static const struct fbnic_info *fbnic_info_tbl[] = { + [fbnic_board_asic] = &fbnic_asic_info, +}; + +static const struct pci_device_id fbnic_pci_tbl[] = { + { PCI_DEVICE_DATA(META, FBNIC_ASIC, fbnic_board_asic) }, + /* required last entry */ + {0, } +}; +MODULE_DEVICE_TABLE(pci, fbnic_pci_tbl); + +/** + * fbnic_probe - Device Initialization Routine + * @pdev: PCI device information struct + * @ent: entry in fbnic_pci_tbl + * + * Returns 0 on success, negative on failure + * + * Initializes a PCI device identified by a pci_dev structure. + * The OS initialization, configuring of the adapter private structure, + * and a hardware reset occur. + **/ +static int fbnic_probe(struct pci_dev *pdev, const struct pci_device_id *ent) +{ + const struct fbnic_info *info = fbnic_info_tbl[ent->driver_data]; + int err; + + if (pdev->error_state != pci_channel_io_normal) { + dev_err(&pdev->dev, + "PCI device still in an error state. Unable to load...\n"); + return -EIO; + } + + err = pcim_enable_device(pdev); + if (err) { + dev_err(&pdev->dev, "PCI enable device failed: %d\n", err); + return err; + } + + err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(46)); + if (err) + err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); + if (err) { + dev_err(&pdev->dev, "DMA configuration failed: %d\n", err); + return err; + } + + err = pcim_iomap_regions(pdev, info->bar_mask, fbnic_driver_name); + if (err) { + dev_err(&pdev->dev, + "pci_request_selected_regions failed: %d\n", err); + return err; + } + + pci_set_master(pdev); + pci_save_state(pdev); + + return 0; +} + +/** + * fbnic_remove - Device Removal Routine + * @pdev: PCI device information struct + * + * Called by the PCI subsystem to alert the driver that it should release + * a PCI device. The could be caused by a Hot-Plug event, or because the + * driver is going to be removed from memory. + **/ +static void fbnic_remove(struct pci_dev *pdev) +{ +} + +static int fbnic_pm_suspend(struct device *dev) +{ + return 0; +} + +static int __fbnic_pm_resume(struct device *dev) +{ + return 0; +} + +static int __maybe_unused fbnic_pm_resume(struct device *dev) +{ + int err; + + err = __fbnic_pm_resume(dev); + + return err; +} + +static const struct dev_pm_ops fbnic_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(fbnic_pm_suspend, fbnic_pm_resume) +}; + +static void fbnic_shutdown(struct pci_dev *pdev) +{ + fbnic_pm_suspend(&pdev->dev); +} + +static pci_ers_result_t fbnic_err_error_detected(struct pci_dev *pdev, + pci_channel_state_t state) +{ + /* disconnect device if failure is not recoverable via reset */ + if (state == pci_channel_io_perm_failure) + return PCI_ERS_RESULT_DISCONNECT; + + fbnic_pm_suspend(&pdev->dev); + + /* Request a slot reset */ + return PCI_ERS_RESULT_NEED_RESET; +} + +static pci_ers_result_t fbnic_err_slot_reset(struct pci_dev *pdev) +{ + pci_set_power_state(pdev, PCI_D0); + pci_restore_state(pdev); + pci_save_state(pdev); + + if (pci_enable_device_mem(pdev)) { + dev_err(&pdev->dev, + "Cannot re-enable PCI device after reset.\n"); + return PCI_ERS_RESULT_DISCONNECT; + } + + return PCI_ERS_RESULT_RECOVERED; +} + +static void fbnic_err_resume(struct pci_dev *pdev) +{ +} + +static const struct pci_error_handlers fbnic_err_handler = { + .error_detected = fbnic_err_error_detected, + .slot_reset = fbnic_err_slot_reset, + .resume = fbnic_err_resume, +}; + +static struct pci_driver fbnic_driver = { + .name = fbnic_driver_name, + .id_table = fbnic_pci_tbl, + .probe = fbnic_probe, + .remove = fbnic_remove, + .driver.pm = &fbnic_pm_ops, + .shutdown = fbnic_shutdown, + .err_handler = &fbnic_err_handler, +}; + +/** + * fbnic_init_module - Driver Registration Routine + * + * The first routine called when the driver is loaded. All it does is + * register with the PCI subsystem. + **/ +static int __init fbnic_init_module(void) +{ + int err; + + pr_info(DRV_SUMMARY " (%s)", fbnic_driver.name); + + err = pci_register_driver(&fbnic_driver); + + return err; +} +module_init(fbnic_init_module); + +/** + * fbnic_exit_module - Driver Exit Cleanup Routine + * + * Called just before the driver is removed from memory. + **/ +static void __exit fbnic_exit_module(void) +{ + pci_unregister_driver(&fbnic_driver); +} +module_exit(fbnic_exit_module);