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 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id ADF86C5B54E for ; Wed, 28 May 2025 14:05:17 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 6189310E60F; Wed, 28 May 2025 14:05:17 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="LE0GNPzf"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.13]) by gabe.freedesktop.org (Postfix) with ESMTPS id EA4FF10E5FB; Wed, 28 May 2025 14:05:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1748441115; x=1779977115; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=vdI/8IOI+awAv03+bcdIajiB8C8rs77C4e9IwS0AfQI=; b=LE0GNPzfvq91tOm6NINrccqRhSzzYZkHfUQvhY5bEpz53T9byiAVoHAU OwDqh7lBMonKWOFAeYWI8yuODF1PS23JyNK3kerY459VW8v0IB5SEWmoT csMQtsSH9GHU2ntbVf1AyWKlv74lhtQDD6obkpTsXlQ4cOXgHv/w8c65H Efj3S22bfLUFKvdS8eNgMm16nIGmxeQT0WJ3NIah4oD7T4y67HxWTVrHK Pkmwt86QdwFPmsJJ/D+zI7pKw7HvMy/KpYKuF/Zb+9+38GDjrnEv5fJxz zNmuEE80GCa1s2DRPvVxnnSYm/QE5s81ja+JyQ8khFOHF1RZ55Jx8MnU4 Q==; X-CSE-ConnectionGUID: yDAndkWDS7K4RqxnLn7ZDQ== X-CSE-MsgGUID: JIZpa1GTTbuyuorKOiWMIA== X-IronPort-AV: E=McAfee;i="6700,10204,11447"; a="61524851" X-IronPort-AV: E=Sophos;i="6.15,321,1739865600"; d="scan'208";a="61524851" Received: from fmviesa007.fm.intel.com ([10.60.135.147]) by orvoesa105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 28 May 2025 07:05:15 -0700 X-CSE-ConnectionGUID: tK/eYM0ZRw2Hmq8rhlPcew== X-CSE-MsgGUID: rsdDUH/eQlC9jyh+MCbvLQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.15,321,1739865600"; d="scan'208";a="143238853" Received: from sannilnx-dsk.jer.intel.com ([10.12.231.107]) by fmviesa007-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 28 May 2025 07:05:09 -0700 From: Alexander Usyskin To: Miquel Raynal , Richard Weinberger , Vignesh Raghavendra , Lucas De Marchi , =?UTF-8?q?Thomas=20Hellstr=C3=B6m?= , Rodrigo Vivi , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Jani Nikula , Joonas Lahtinen , Tvrtko Ursulin , Karthik Poosa , Raag Jadav Cc: Reuven Abliyev , Oren Weil , linux-mtd@lists.infradead.org, intel-xe@lists.freedesktop.org, dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, linux-kernel@vger.kernel.org, Alexander Usyskin , Tomas Winkler Subject: [PATCH v11 01/10] mtd: add driver for intel graphics non-volatile memory device Date: Wed, 28 May 2025 16:51:06 +0300 Message-ID: <20250528135115.2512429-2-alexander.usyskin@intel.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250528135115.2512429-1-alexander.usyskin@intel.com> References: <20250528135115.2512429-1-alexander.usyskin@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: intel-xe@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel Xe graphics driver List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-xe-bounces@lists.freedesktop.org Sender: "Intel-xe" Add auxiliary driver for intel discrete graphics non-volatile memory device. CC: Lucas De Marchi Reviewed-by: Raag Jadav Reviewed-by: Rodrigo Vivi Acked-by: Miquel Raynal Co-developed-by: Tomas Winkler Signed-off-by: Tomas Winkler Signed-off-by: Alexander Usyskin --- MAINTAINERS | 7 ++ drivers/mtd/devices/Kconfig | 11 +++ drivers/mtd/devices/Makefile | 1 + drivers/mtd/devices/mtd_intel_dg.c | 134 +++++++++++++++++++++++++++++ include/linux/intel_dg_nvm_aux.h | 30 +++++++ 5 files changed, 183 insertions(+) create mode 100644 drivers/mtd/devices/mtd_intel_dg.c create mode 100644 include/linux/intel_dg_nvm_aux.h diff --git a/MAINTAINERS b/MAINTAINERS index e72666dc0973..7840ebe597d3 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -11898,6 +11898,13 @@ L: linux-kernel@vger.kernel.org S: Supported F: arch/x86/include/asm/intel-family.h +INTEL DISCRETE GRAPHICS NVM MTD DRIVER +M: Alexander Usyskin +L: linux-mtd@lists.infradead.org +S: Supported +F: drivers/mtd/devices/mtd_intel_dg.c +F: include/linux/intel_dg_nvm_aux.h + INTEL DRM DISPLAY FOR XE AND I915 DRIVERS M: Jani Nikula M: Rodrigo Vivi diff --git a/drivers/mtd/devices/Kconfig b/drivers/mtd/devices/Kconfig index ff2f9e55ef28..59be6d3f0d32 100644 --- a/drivers/mtd/devices/Kconfig +++ b/drivers/mtd/devices/Kconfig @@ -183,6 +183,17 @@ config MTD_POWERNV_FLASH platforms from Linux. This device abstracts away the firmware interface for flash access. +config MTD_INTEL_DG + tristate "Intel Discrete Graphics non-volatile memory driver" + depends on AUXILIARY_BUS + depends on MTD + help + This provides an MTD device to access Intel Discrete Graphics + non-volatile memory. + + To compile this driver as a module, choose M here: the module + will be called mtd-intel-dg. + comment "Disk-On-Chip Device Drivers" config MTD_DOCG3 diff --git a/drivers/mtd/devices/Makefile b/drivers/mtd/devices/Makefile index d11eb2b8b6f8..9fe4ce9cffde 100644 --- a/drivers/mtd/devices/Makefile +++ b/drivers/mtd/devices/Makefile @@ -18,6 +18,7 @@ obj-$(CONFIG_MTD_SST25L) += sst25l.o obj-$(CONFIG_MTD_BCM47XXSFLASH) += bcm47xxsflash.o obj-$(CONFIG_MTD_ST_SPI_FSM) += st_spi_fsm.o obj-$(CONFIG_MTD_POWERNV_FLASH) += powernv_flash.o +obj-$(CONFIG_MTD_INTEL_DG) += mtd_intel_dg.o CFLAGS_docg3.o += -I$(src) diff --git a/drivers/mtd/devices/mtd_intel_dg.c b/drivers/mtd/devices/mtd_intel_dg.c new file mode 100644 index 000000000000..c2d0dbfb0378 --- /dev/null +++ b/drivers/mtd/devices/mtd_intel_dg.c @@ -0,0 +1,134 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright(c) 2019-2025, Intel Corporation. All rights reserved. + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +struct intel_dg_nvm { + struct kref refcnt; + void __iomem *base; + size_t size; + unsigned int nregions; + struct { + const char *name; + u8 id; + u64 offset; + u64 size; + } regions[] __counted_by(nregions); +}; + +static void intel_dg_nvm_release(struct kref *kref) +{ + struct intel_dg_nvm *nvm = container_of(kref, struct intel_dg_nvm, refcnt); + int i; + + pr_debug("freeing intel_dg nvm\n"); + for (i = 0; i < nvm->nregions; i++) + kfree(nvm->regions[i].name); + kfree(nvm); +} + +static int intel_dg_mtd_probe(struct auxiliary_device *aux_dev, + const struct auxiliary_device_id *aux_dev_id) +{ + struct intel_dg_nvm_dev *invm = auxiliary_dev_to_intel_dg_nvm_dev(aux_dev); + struct intel_dg_nvm *nvm; + struct device *device; + unsigned int nregions; + unsigned int i, n; + int ret; + + device = &aux_dev->dev; + + /* count available regions */ + for (nregions = 0, i = 0; i < INTEL_DG_NVM_REGIONS; i++) { + if (invm->regions[i].name) + nregions++; + } + + if (!nregions) { + dev_err(device, "no regions defined\n"); + return -ENODEV; + } + + nvm = kzalloc(struct_size(nvm, regions, nregions), GFP_KERNEL); + if (!nvm) + return -ENOMEM; + + kref_init(&nvm->refcnt); + + for (n = 0, i = 0; i < INTEL_DG_NVM_REGIONS; i++) { + if (!invm->regions[i].name) + continue; + + char *name = kasprintf(GFP_KERNEL, "%s.%s", + dev_name(&aux_dev->dev), invm->regions[i].name); + if (!name) + continue; + nvm->regions[n].name = name; + nvm->regions[n].id = i; + n++; + } + nvm->nregions = n; /* in case where kasprintf fail */ + + nvm->base = devm_ioremap_resource(device, &invm->bar); + if (IS_ERR(nvm->base)) { + ret = PTR_ERR(nvm->base); + goto err; + } + + dev_set_drvdata(&aux_dev->dev, nvm); + + return 0; + +err: + kref_put(&nvm->refcnt, intel_dg_nvm_release); + return ret; +} + +static void intel_dg_mtd_remove(struct auxiliary_device *aux_dev) +{ + struct intel_dg_nvm *nvm = dev_get_drvdata(&aux_dev->dev); + + if (!nvm) + return; + + dev_set_drvdata(&aux_dev->dev, NULL); + + kref_put(&nvm->refcnt, intel_dg_nvm_release); +} + +static const struct auxiliary_device_id intel_dg_mtd_id_table[] = { + { + .name = "i915.nvm", + }, + { + .name = "xe.nvm", + }, + { + /* sentinel */ + } +}; +MODULE_DEVICE_TABLE(auxiliary, intel_dg_mtd_id_table); + +static struct auxiliary_driver intel_dg_mtd_driver = { + .probe = intel_dg_mtd_probe, + .remove = intel_dg_mtd_remove, + .driver = { + /* auxiliary_driver_register() sets .name to be the modname */ + }, + .id_table = intel_dg_mtd_id_table +}; +module_auxiliary_driver(intel_dg_mtd_driver); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Intel Corporation"); +MODULE_DESCRIPTION("Intel DGFX MTD driver"); diff --git a/include/linux/intel_dg_nvm_aux.h b/include/linux/intel_dg_nvm_aux.h new file mode 100644 index 000000000000..00b6c1301bd8 --- /dev/null +++ b/include/linux/intel_dg_nvm_aux.h @@ -0,0 +1,30 @@ +/* SPDX-License-Identifier: MIT */ +/* + * Copyright(c) 2019-2025, Intel Corporation. All rights reserved. + */ + +#ifndef __INTEL_DG_NVM_AUX_H__ +#define __INTEL_DG_NVM_AUX_H__ + +#include +#include +#include +#include + +#define INTEL_DG_NVM_REGIONS 13 + +struct intel_dg_nvm_region { + const char *name; +}; + +struct intel_dg_nvm_dev { + struct auxiliary_device aux_dev; + bool writable_override; + struct resource bar; + const struct intel_dg_nvm_region *regions; +}; + +#define auxiliary_dev_to_intel_dg_nvm_dev(auxiliary_dev) \ + container_of(auxiliary_dev, struct intel_dg_nvm_dev, aux_dev) + +#endif /* __INTEL_DG_NVM_AUX_H__ */ -- 2.43.0