From nobody Sun Nov 24 06:53:00 2024 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.12]) (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 89B22212D33 for ; Thu, 7 Nov 2024 13:26:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.12 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730985992; cv=none; b=fupdCUclkU5fcyKWplpphpattmzztR/gIuucXBf2z+pIcS81EMWUF+J1Hno5nLkpMob2kj0QGiWZl4xWy1vutmn3lV6jP7hIdkCUu+ghVTj0MZ57Xg9E3Ei5fTO255ZvKJJ9xZ9NVLdamDB/tw+xlKllCIZHyGq/65EovnnCTA0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730985992; c=relaxed/simple; bh=eQCe4pq6eivEMPUfRaVgcvbfa97jJA4BKGkyb4xn8zY=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=mRP/nudmhQnwrb4Zs7mt1HS7kHYEZmipoZXnlFEn4OTHPxEAMEf1mPreJTFzP+5YIy9Kgm3L+e3q1j3MIP3thDl1pJPCdiRSEpFEw3DIBmF7WkF2D9LNUtoj72xlFoTUvGkrkfSQKklTGsLD4wZkx5z5XrTEK5mVCRdwQURhWqA= 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=nJr8/nLq; arc=none smtp.client-ip=192.198.163.12 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="nJr8/nLq" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1730985990; x=1762521990; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=eQCe4pq6eivEMPUfRaVgcvbfa97jJA4BKGkyb4xn8zY=; b=nJr8/nLqyKcAU3aGFpkDZM2sy3xLVkdieZ9kfhw4d+ct89+tX4ugBfTs m4+GJglGXJgUMvqmSPWQ3XMa2oJ8bJIRfkivNjhlym4/9sM32DqH57DS2 di1YSxYBiriAnl9mHVuayhs4gWdEkMtlF0fQPJ/GI1m0THZ1oo/VnBkT4 rOjIMqz4sUaaSmGBsZHwihAS2G5CVh1YxrcWIjXC27MYPtrv1pF2t/gSD PVil1DdYbgYH2zPeSq/fSbHu3Pzz0c3ujy72Nwqd/j0J8056UB/wpDA28 bTuZLE8/a//0Uug1hb1wgvEEbj7K2NJpOq1a7JtiItnRiO4XLLHnWLIMC w==; X-CSE-ConnectionGUID: zcnPA75iRKaXpbjmMkNO6w== X-CSE-MsgGUID: MVk0QGEmQi+2th4TecIHLQ== X-IronPort-AV: E=McAfee;i="6700,10204,11249"; a="34750789" X-IronPort-AV: E=Sophos;i="6.12,266,1728975600"; d="scan'208";a="34750789" Received: from orviesa005.jf.intel.com ([10.64.159.145]) by fmvoesa106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Nov 2024 05:26:30 -0800 X-CSE-ConnectionGUID: OZ5bX8X7Q7+hBCppOkgDFQ== X-CSE-MsgGUID: i3CCZGuzTju2Khqjv0QZAw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.12,266,1728975600"; d="scan'208";a="89921748" Received: from sannilnx-dsk.jer.intel.com ([10.12.231.107]) by orviesa005-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Nov 2024 05:26:26 -0800 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 Cc: Oren Weil , linux-mtd@lists.infradead.org, dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, linux-kernel@vger.kernel.org, Alexander Usyskin , Tomas Winkler Subject: [PATCH v2 07/10] drm/i915/nvm: add nvm device for discrete graphics Date: Thu, 7 Nov 2024 15:13:53 +0200 Message-ID: <20241107131356.2796969-8-alexander.usyskin@intel.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20241107131356.2796969-1-alexander.usyskin@intel.com> References: <20241107131356.2796969-1-alexander.usyskin@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" Enable access to internal non-volatile memory on DGFX devices via a child device. The nvm child device is exposed via auxiliary bus. CC: Rodrigo Vivi CC: Lucas De Marchi Co-developed-by: Tomas Winkler Signed-off-by: Tomas Winkler Signed-off-by: Alexander Usyskin Reviewed-by: Rodrigo Vivi --- drivers/gpu/drm/i915/Makefile | 4 ++ drivers/gpu/drm/i915/i915_driver.c | 6 ++ drivers/gpu/drm/i915/i915_drv.h | 3 + drivers/gpu/drm/i915/i915_reg.h | 1 + drivers/gpu/drm/i915/intel_nvm.c | 94 ++++++++++++++++++++++++++++++ drivers/gpu/drm/i915/intel_nvm.h | 15 +++++ 6 files changed, 123 insertions(+) create mode 100644 drivers/gpu/drm/i915/intel_nvm.c create mode 100644 drivers/gpu/drm/i915/intel_nvm.h diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile index e033bcaef4f3..09f509843b4e 100644 --- a/drivers/gpu/drm/i915/Makefile +++ b/drivers/gpu/drm/i915/Makefile @@ -212,6 +212,10 @@ i915-y +=3D \ i915-y +=3D \ gt/intel_gsc.o =20 +# graphics nvm device (DGFX) support +i915-y +=3D \ + intel_nvm.o + # graphics hardware monitoring (HWMON) support i915-$(CONFIG_HWMON) +=3D \ i915_hwmon.o diff --git a/drivers/gpu/drm/i915/i915_driver.c b/drivers/gpu/drm/i915/i915= _driver.c index 365329ff8a07..7f7dffdc8852 100644 --- a/drivers/gpu/drm/i915/i915_driver.c +++ b/drivers/gpu/drm/i915/i915_driver.c @@ -80,6 +80,8 @@ #include "soc/intel_dram.h" #include "soc/intel_gmch.h" =20 +#include "intel_nvm.h" + #include "i915_debugfs.h" #include "i915_driver.h" #include "i915_drm_client.h" @@ -620,6 +622,8 @@ static void i915_driver_register(struct drm_i915_privat= e *dev_priv) /* Depends on sysfs having been initialized */ i915_perf_register(dev_priv); =20 + intel_nvm_init(dev_priv); + for_each_gt(gt, dev_priv, i) intel_gt_driver_register(gt); =20 @@ -663,6 +667,8 @@ static void i915_driver_unregister(struct drm_i915_priv= ate *dev_priv) =20 i915_hwmon_unregister(dev_priv); =20 + intel_nvm_fini(dev_priv); + i915_perf_unregister(dev_priv); i915_pmu_unregister(dev_priv); =20 diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_dr= v.h index a66e5bb078cf..faaad8b16ab9 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -67,6 +67,7 @@ struct drm_i915_clock_gating_funcs; struct vlv_s0ix_state; struct intel_pxp; +struct intel_dg_nvm_dev; =20 #define GEM_QUIRK_PIN_SWIZZLED_PAGES BIT(0) =20 @@ -316,6 +317,8 @@ struct drm_i915_private { =20 struct i915_perf perf; =20 + struct intel_dg_nvm_dev *nvm; + struct i915_hwmon *hwmon; =20 struct intel_gt *gt[I915_MAX_GT]; diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_re= g.h index 818142f5a10c..eddafd5d7628 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -323,6 +323,7 @@ #define DG2_GSC_HECI2_BASE 0x00374000 #define MTL_GSC_HECI1_BASE 0x00116000 #define MTL_GSC_HECI2_BASE 0x00117000 +#define GEN12_GUNIT_NVM_BASE 0x00102040 =20 #define HECI_H_CSR(base) _MMIO((base) + 0x4) #define HECI_H_CSR_IE REG_BIT(0) diff --git a/drivers/gpu/drm/i915/intel_nvm.c b/drivers/gpu/drm/i915/intel_= nvm.c new file mode 100644 index 000000000000..214c4d47a9cd --- /dev/null +++ b/drivers/gpu/drm/i915/intel_nvm.c @@ -0,0 +1,94 @@ +// SPDX-License-Identifier: MIT +/* + * Copyright(c) 2019-2024, Intel Corporation. All rights reserved. + */ + +#include +#include +#include "i915_reg.h" +#include "i915_drv.h" +#include "intel_nvm.h" + +#define GEN12_GUNIT_NVM_SIZE 0x80 + +static const struct intel_dg_nvm_region regions[INTEL_DG_NVM_REGIONS] =3D { + [0] =3D { .name =3D "DESCRIPTOR", }, + [2] =3D { .name =3D "GSC", }, + [11] =3D { .name =3D "OptionROM", }, + [12] =3D { .name =3D "DAM", }, +}; + +static void i915_nvm_release_dev(struct device *dev) +{ +} + +void intel_nvm_init(struct drm_i915_private *i915) +{ + struct pci_dev *pdev =3D to_pci_dev(i915->drm.dev); + struct intel_dg_nvm_dev *nvm; + struct auxiliary_device *aux_dev; + int ret; + + /* Only the DGFX devices have internal NVM */ + if (!IS_DGFX(i915)) + return; + + /* Nvm pointer should be NULL here */ + if (WARN_ON(i915->nvm)) + return; + + i915->nvm =3D kzalloc(sizeof(*nvm), GFP_KERNEL); + if (!i915->nvm) + return; + + nvm =3D i915->nvm; + + nvm->writeable_override =3D true; + nvm->bar.parent =3D &pdev->resource[0]; + nvm->bar.start =3D GEN12_GUNIT_NVM_BASE + pdev->resource[0].start; + nvm->bar.end =3D nvm->bar.start + GEN12_GUNIT_NVM_SIZE - 1; + nvm->bar.flags =3D IORESOURCE_MEM; + nvm->bar.desc =3D IORES_DESC_NONE; + nvm->regions =3D regions; + + aux_dev =3D &nvm->aux_dev; + + aux_dev->name =3D "nvm"; + aux_dev->id =3D (pci_domain_nr(pdev->bus) << 16) | + PCI_DEVID(pdev->bus->number, pdev->devfn); + aux_dev->dev.parent =3D &pdev->dev; + aux_dev->dev.release =3D i915_nvm_release_dev; + + ret =3D auxiliary_device_init(aux_dev); + if (ret) { + drm_err(&i915->drm, "i915-nvm aux init failed %d\n", ret); + return; + } + + ret =3D auxiliary_device_add(aux_dev); + if (ret) { + drm_err(&i915->drm, "i915-nvm aux add failed %d\n", ret); + auxiliary_device_uninit(aux_dev); + return; + } +} + +void intel_nvm_fini(struct drm_i915_private *i915) +{ + struct intel_dg_nvm_dev *nvm =3D i915->nvm; + + /* Only the DGFX devices have internal NVM */ + if (!IS_DGFX(i915)) + return; + + /* Nvm pointer should not be NULL here */ + if (WARN_ON(!nvm)) + return; + + drm_err(&i915->drm, "removing i915-nvm cell\n"); + + auxiliary_device_delete(&nvm->aux_dev); + auxiliary_device_uninit(&nvm->aux_dev); + kfree(nvm); + i915->nvm =3D NULL; +} diff --git a/drivers/gpu/drm/i915/intel_nvm.h b/drivers/gpu/drm/i915/intel_= nvm.h new file mode 100644 index 000000000000..7bc3d1114a3f --- /dev/null +++ b/drivers/gpu/drm/i915/intel_nvm.h @@ -0,0 +1,15 @@ +/* SPDX-License-Identifier: MIT */ +/* + * Copyright(c) 2019-2024 Intel Corporation. All rights reserved. + */ + +#ifndef __INTEL_NVM_H__ +#define __INTEL_NVM_H__ + +struct drm_i915_private; + +void intel_nvm_init(struct drm_i915_private *i915); + +void intel_nvm_fini(struct drm_i915_private *i915); + +#endif /* __INTEL_NVM_H__ */ --=20 2.43.0