From nobody Tue Dec 2 02:59:31 2025 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.12]) (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 DCFC2339710; Mon, 17 Nov 2025 13:49:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.12 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763387384; cv=none; b=SGOhcZMp90hTstzQ9PT6JpB21GRayv7Ri9nM+gMIhJp2K1RDZXHB+M17ajIyI4zjgv7bnn/dTXvHEEPhctj8iGXoJsksT3EmUDM4Lm0VtG68dJN8m0G1D0NTfeKNLe7J9MU5tWorXKKpolvfHzKWUAYjMT8m0KAbATG2P0kyJYI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763387384; c=relaxed/simple; bh=5NxpeFPem5dupZlDkmIECYWVmennFW8ehDMdfCoCnRY=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=gSomRkgXzyJLKnqOfZd28Oi1lBvnPMFcFCNf4yJzBsiFLTJNXMDjGLYzr1wBDqks1UJUOLwRMb/gu/zu9UyfTBTsGdJL+XvM3mKHwkowJ+BFuf++H4fK8jGe3Agn2uYn3BMsvjD8TVntRn89T6iecUykMQWEpcwRDA3G6d5esHI= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=DUARZsiJ; arc=none smtp.client-ip=198.175.65.12 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="DUARZsiJ" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1763387382; x=1794923382; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=5NxpeFPem5dupZlDkmIECYWVmennFW8ehDMdfCoCnRY=; b=DUARZsiJHbJAbE3aDQ/V6d50EToCnWliqn85H0W9dLHxYmC3PKbiBJox DjRGGGjFKjop4ElXIRdHvWKv/q2eTp4Ybabhw3t+RAwK3JqOQTc0z06gH qW+GsidcLgGkE3CPx3nT9I8mQfqyaFn3UbXRwy7WVH1lECMluqxA7aUMd a3LN0dw1pbdBBjPNlSdnZDxkqLEJ40sEHj1+Q0tPBtlANnlli+L8Krzr3 6sHLjMpMZlak4RNZj6FA255PNuWN9r3G1GcB9VD6n1zBPXv+ybMNfFaGT rzlAMVtMJS58vZuXDrAay4A4d7gLWuNxG883Z0lFdos1NEpGjA0ANGpBN g==; X-CSE-ConnectionGUID: eaKq/nggSKaPsgkqWymwUg== X-CSE-MsgGUID: rXwfAEwuQYKBb+Gptn//bg== X-IronPort-AV: E=McAfee;i="6800,10657,11616"; a="76846172" X-IronPort-AV: E=Sophos;i="6.19,311,1754982000"; d="scan'208";a="76846172" Received: from fmviesa007.fm.intel.com ([10.60.135.147]) by orvoesa104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Nov 2025 05:49:41 -0800 X-CSE-ConnectionGUID: dmdgqO60S1qDlum9FZPHjA== X-CSE-MsgGUID: O7/sGkhOTymG03Ker6nccw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.19,311,1754982000"; d="scan'208";a="190115737" Received: from irvmail002.ir.intel.com ([10.43.11.120]) by fmviesa007.fm.intel.com with ESMTP; 17 Nov 2025 05:49:36 -0800 Received: from mglak.igk.intel.com (mglak.igk.intel.com [10.237.112.146]) by irvmail002.ir.intel.com (Postfix) with ESMTP id 98E3837E3D; Mon, 17 Nov 2025 13:49:34 +0000 (GMT) From: Larysa Zaremba To: intel-wired-lan@lists.osuosl.org, Tony Nguyen Cc: aleksander.lobakin@intel.com, sridhar.samudrala@intel.com, "Singhai, Anjali" , Michal Swiatkowski , Larysa Zaremba , "Fijalkowski, Maciej" , Emil Tantilov , Madhu Chittim , Josh Hay , "Keller, Jacob E" , jayaprakash.shanmugam@intel.com, natalia.wochtman@intel.com, Jiri Pirko , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Simon Horman , Jonathan Corbet , Richard Cochran , Przemek Kitszel , Andrew Lunn , netdev@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH iwl-next v5 12/15] ixd: add basic driver framework for Intel(R) Control Plane Function Date: Mon, 17 Nov 2025 14:48:52 +0100 Message-ID: <20251117134912.18566-13-larysa.zaremba@intel.com> X-Mailer: git-send-email 2.47.0 In-Reply-To: <20251117134912.18566-1-larysa.zaremba@intel.com> References: <20251117134912.18566-1-larysa.zaremba@intel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Add module register and probe functionality. Add the required support to register IXD PCI driver, as well as probe and remove call backs. Enable the PCI device and request the kernel to reserve the memory resources that will be used by the driver. Finally map the BAR0 address space. For now, use devm_alloc() to allocate adapter, as it requires the least amount of code. In a later commit, it will be replaced with a devlink alternative. Co-developed-by: Amritha Nambiar Signed-off-by: Amritha Nambiar Reviewed-by: Maciej Fijalkowski Signed-off-by: Larysa Zaremba --- .../device_drivers/ethernet/index.rst | 1 + .../device_drivers/ethernet/intel/ixd.rst | 39 ++++++ drivers/net/ethernet/intel/Kconfig | 2 + drivers/net/ethernet/intel/Makefile | 1 + drivers/net/ethernet/intel/ixd/Kconfig | 13 ++ drivers/net/ethernet/intel/ixd/Makefile | 8 ++ drivers/net/ethernet/intel/ixd/ixd.h | 28 +++++ drivers/net/ethernet/intel/ixd/ixd_lan_regs.h | 28 +++++ drivers/net/ethernet/intel/ixd/ixd_main.c | 112 ++++++++++++++++++ 9 files changed, 232 insertions(+) create mode 100644 Documentation/networking/device_drivers/ethernet/intel/= ixd.rst create mode 100644 drivers/net/ethernet/intel/ixd/Kconfig create mode 100644 drivers/net/ethernet/intel/ixd/Makefile create mode 100644 drivers/net/ethernet/intel/ixd/ixd.h create mode 100644 drivers/net/ethernet/intel/ixd/ixd_lan_regs.h create mode 100644 drivers/net/ethernet/intel/ixd/ixd_main.c diff --git a/Documentation/networking/device_drivers/ethernet/index.rst b/D= ocumentation/networking/device_drivers/ethernet/index.rst index bcc02355f828..b73d13a2f748 100644 --- a/Documentation/networking/device_drivers/ethernet/index.rst +++ b/Documentation/networking/device_drivers/ethernet/index.rst @@ -38,6 +38,7 @@ Contents: intel/igbvf intel/ixgbe intel/ixgbevf + intel/ixd intel/i40e intel/iavf intel/ice diff --git a/Documentation/networking/device_drivers/ethernet/intel/ixd.rst= b/Documentation/networking/device_drivers/ethernet/intel/ixd.rst new file mode 100644 index 000000000000..1387626e5d20 --- /dev/null +++ b/Documentation/networking/device_drivers/ethernet/intel/ixd.rst @@ -0,0 +1,39 @@ +.. SPDX-License-Identifier: GPL-2.0+ + +=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D +iXD Linux* Base Driver for the Intel(R) Control Plane Function +=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D + +Intel iXD Linux driver. +Copyright(C) 2025 Intel Corporation. + +.. contents:: + +For questions related to hardware requirements, refer to the documentation +supplied with your Intel adapter. All hardware requirements listed apply t= o use +with Linux. + + +Identifying Your Adapter +=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D +For information on how to identify your adapter, and for the latest Intel +network drivers, refer to the Intel Support website: +http://www.intel.com/support + + +Support +=3D=3D=3D=3D=3D=3D=3D +For general information, go to the Intel support website at: +http://www.intel.com/support/ + +If an issue is identified with the released source code on a supported ker= nel +with a supported adapter, email the specific information related to the is= sue +to intel-wired-lan@lists.osuosl.org. + + +Trademarks +=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D +Intel is a trademark or registered trademark of Intel Corporation or its +subsidiaries in the United States and/or other countries. + +* Other names and brands may be claimed as the property of others. diff --git a/drivers/net/ethernet/intel/Kconfig b/drivers/net/ethernet/inte= l/Kconfig index 288fa8ce53af..780f113986ea 100644 --- a/drivers/net/ethernet/intel/Kconfig +++ b/drivers/net/ethernet/intel/Kconfig @@ -398,4 +398,6 @@ config IGC_LEDS =20 source "drivers/net/ethernet/intel/idpf/Kconfig" =20 +source "drivers/net/ethernet/intel/ixd/Kconfig" + endif # NET_VENDOR_INTEL diff --git a/drivers/net/ethernet/intel/Makefile b/drivers/net/ethernet/int= el/Makefile index 9a37dc76aef0..08b29f3b6801 100644 --- a/drivers/net/ethernet/intel/Makefile +++ b/drivers/net/ethernet/intel/Makefile @@ -19,3 +19,4 @@ obj-$(CONFIG_IAVF) +=3D iavf/ obj-$(CONFIG_FM10K) +=3D fm10k/ obj-$(CONFIG_ICE) +=3D ice/ obj-$(CONFIG_IDPF) +=3D idpf/ +obj-$(CONFIG_IXD) +=3D ixd/ diff --git a/drivers/net/ethernet/intel/ixd/Kconfig b/drivers/net/ethernet/= intel/ixd/Kconfig new file mode 100644 index 000000000000..f5594efe292c --- /dev/null +++ b/drivers/net/ethernet/intel/ixd/Kconfig @@ -0,0 +1,13 @@ +# SPDX-License-Identifier: GPL-2.0-only +# Copyright (C) 2025 Intel Corporation + +config IXD + tristate "Intel(R) Control Plane Function Support" + depends on PCI_MSI + select LIBETH + select LIBIE_PCI + help + This driver supports Intel(R) Control Plane PCI Function + of Intel E2100 and later IPUs and FNICs. + It facilitates a centralized control over multiple IDPF PFs/VFs/SFs + exposed by the same card. diff --git a/drivers/net/ethernet/intel/ixd/Makefile b/drivers/net/ethernet= /intel/ixd/Makefile new file mode 100644 index 000000000000..3849bc240600 --- /dev/null +++ b/drivers/net/ethernet/intel/ixd/Makefile @@ -0,0 +1,8 @@ +# SPDX-License-Identifier: GPL-2.0-only +# Copyright (C) 2025 Intel Corporation + +# Intel(R) Control Plane Function Linux Driver + +obj-$(CONFIG_IXD) +=3D ixd.o + +ixd-y :=3D ixd_main.o diff --git a/drivers/net/ethernet/intel/ixd/ixd.h b/drivers/net/ethernet/in= tel/ixd/ixd.h new file mode 100644 index 000000000000..d813c27941a5 --- /dev/null +++ b/drivers/net/ethernet/intel/ixd/ixd.h @@ -0,0 +1,28 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* Copyright (C) 2025 Intel Corporation */ + +#ifndef _IXD_H_ +#define _IXD_H_ + +#include + +/** + * struct ixd_adapter - Data structure representing a CPF + * @hw: Device access data + */ +struct ixd_adapter { + struct libie_mmio_info hw; +}; + +/** + * ixd_to_dev - Get the corresponding device struct from an adapter + * @adapter: PCI device driver-specific private data + * + * Return: struct device corresponding to the given adapter + */ +static inline struct device *ixd_to_dev(struct ixd_adapter *adapter) +{ + return &adapter->hw.pdev->dev; +} + +#endif /* _IXD_H_ */ diff --git a/drivers/net/ethernet/intel/ixd/ixd_lan_regs.h b/drivers/net/et= hernet/intel/ixd/ixd_lan_regs.h new file mode 100644 index 000000000000..a991eaa8a2aa --- /dev/null +++ b/drivers/net/ethernet/intel/ixd/ixd_lan_regs.h @@ -0,0 +1,28 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* Copyright (C) 2025 Intel Corporation */ + +#ifndef _IXD_LAN_REGS_H_ +#define _IXD_LAN_REGS_H_ + +/* Control Plane Function PCI ID */ +#define IXD_DEV_ID_CPF 0x1453 + +/* Control Queue (Mailbox) */ +#define PF_FW_MBX_REG_LEN 4096 +#define PF_FW_MBX 0x08400000 + +/* Reset registers */ +#define PFGEN_RTRIG_REG_LEN 2048 +#define PFGEN_RTRIG 0x08407000 /* Device resets */ + +/** + * struct ixd_bar_region - BAR region description + * @offset: BAR region offset + * @size: BAR region size + */ +struct ixd_bar_region { + resource_size_t offset; + resource_size_t size; +}; + +#endif /* _IXD_LAN_REGS_H_ */ diff --git a/drivers/net/ethernet/intel/ixd/ixd_main.c b/drivers/net/ethern= et/intel/ixd/ixd_main.c new file mode 100644 index 000000000000..75ee53152e61 --- /dev/null +++ b/drivers/net/ethernet/intel/ixd/ixd_main.c @@ -0,0 +1,112 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* Copyright (C) 2025 Intel Corporation */ + +#include "ixd.h" +#include "ixd_lan_regs.h" + +MODULE_DESCRIPTION("Intel(R) Control Plane Function Device Driver"); +MODULE_IMPORT_NS("LIBIE_PCI"); +MODULE_LICENSE("GPL"); + +/** + * ixd_remove - remove a CPF PCI device + * @pdev: PCI device being removed + */ +static void ixd_remove(struct pci_dev *pdev) +{ + struct ixd_adapter *adapter =3D pci_get_drvdata(pdev); + + libie_pci_unmap_all_mmio_regions(&adapter->hw); +} + +/** + * ixd_shutdown - shut down a CPF PCI device + * @pdev: PCI device being shut down + */ +static void ixd_shutdown(struct pci_dev *pdev) +{ + ixd_remove(pdev); + + if (system_state =3D=3D SYSTEM_POWER_OFF) + pci_set_power_state(pdev, PCI_D3hot); +} + +/** + * ixd_iomap_regions - iomap PCI BARs + * @adapter: adapter to map memory regions for + * + * Returns: %0 on success, negative on failure + */ +static int ixd_iomap_regions(struct ixd_adapter *adapter) +{ + const struct ixd_bar_region regions[] =3D { + { + .offset =3D PFGEN_RTRIG, + .size =3D PFGEN_RTRIG_REG_LEN, + }, + { + .offset =3D PF_FW_MBX, + .size =3D PF_FW_MBX_REG_LEN, + }, + }; + + for (int i =3D 0; i < ARRAY_SIZE(regions); i++) { + struct libie_mmio_info *mmio_info =3D &adapter->hw; + bool map_ok; + + map_ok =3D libie_pci_map_mmio_region(mmio_info, + regions[i].offset, + regions[i].size); + if (!map_ok) { + dev_err(ixd_to_dev(adapter), + "Failed to map PCI device MMIO region\n"); + + libie_pci_unmap_all_mmio_regions(mmio_info); + return -EIO; + } + } + + return 0; +} + +/** + * ixd_probe - probe a CPF PCI device + * @pdev: corresponding PCI device + * @ent: entry in ixd_pci_tbl + * + * Returns: %0 on success, negative errno code on failure + */ +static int ixd_probe(struct pci_dev *pdev, const struct pci_device_id *ent) +{ + struct ixd_adapter *adapter; + int err; + + adapter =3D devm_kzalloc(&pdev->dev, sizeof(*adapter), GFP_KERNEL); + if (!adapter) + return -ENOMEM; + adapter->hw.pdev =3D pdev; + INIT_LIST_HEAD(&adapter->hw.mmio_list); + + err =3D libie_pci_init_dev(pdev); + if (err) + return err; + + pci_set_drvdata(pdev, adapter); + + return ixd_iomap_regions(adapter); +} + +static const struct pci_device_id ixd_pci_tbl[] =3D { + { PCI_VDEVICE(INTEL, IXD_DEV_ID_CPF) }, + { } +}; +MODULE_DEVICE_TABLE(pci, ixd_pci_tbl); + +static struct pci_driver ixd_driver =3D { + .name =3D KBUILD_MODNAME, + .id_table =3D ixd_pci_tbl, + .probe =3D ixd_probe, + .remove =3D ixd_remove, + .shutdown =3D ixd_shutdown, +}; +module_pci_driver(ixd_driver); --=20 2.47.0