From patchwork Fri Jun 30 11:02:40 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sui Jingfeng X-Patchwork-Id: 13298025 X-Patchwork-Delegate: bhelgaas@google.com 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 18EADEB64DA for ; Fri, 30 Jun 2023 11:03:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232552AbjF3LDr (ORCPT ); Fri, 30 Jun 2023 07:03:47 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50054 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232632AbjF3LDU (ORCPT ); Fri, 30 Jun 2023 07:03:20 -0400 Received: from out-16.mta0.migadu.com (out-16.mta0.migadu.com [IPv6:2001:41d0:1004:224b::10]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6A07F3AA1 for ; Fri, 30 Jun 2023 04:02:55 -0700 (PDT) X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1688122974; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=GIsbNY4Mb47GZOP1sDLnLj7sNU75tuWjGzp78R/rGnQ=; b=be4Jlsr6Jt+Jwj8DCkyi24b4KG/0dC9GA3XAp6Tqzael5epiL0oGvLIoEqH6ypgRU3THZo If0i2i+iFj+0eanEWnnKQVV6cb/ALlv3+XOOVpv1dO+mZ1xbCKWgAxVRUifcretEgYYgmA l9Yeu0TPku1CZuAfdKvfi8eiimFC94w= From: Sui Jingfeng To: Alex Deucher , David Airlie , Daniel Vetter , Thomas Zimmermann , Maxime Ripard , Jani Nikula Cc: dri-devel@lists.freedesktop.org, amd-gfx@lists.freedesktop.org, linux-kernel@vger.kernel.org, intel-gfx@lists.freedesktop.org, nouveau@lists.freedesktop.org, linux-pci@vger.kernel.org, kvm@vger.kernel.org, linux-fbdev@vger.kernel.org, Sui Jingfeng , Javier Martinez Canillas , Maarten Lankhorst , Helge Deller Subject: [PATCH v1 1/4] video/aperture: Add a helper to detect if an aperture contains firmware FB Date: Fri, 30 Jun 2023 19:02:40 +0800 Message-Id: <20230630110243.141671-2-sui.jingfeng@linux.dev> In-Reply-To: <20230630110243.141671-1-sui.jingfeng@linux.dev> References: <20230630110243.141671-1-sui.jingfeng@linux.dev> MIME-Version: 1.0 X-Migadu-Flow: FLOW_OUT Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org From: Sui Jingfeng This patch adds the aperture_contain_firmware_fb() function to do the determination. Unfortunately due to the fact that apertures list will be freed dynamically, the location and size information of the firmware fb will be lost after dedicated drivers call aperture_remove_conflicting_devices(), aperture_remove_conflicting_pci_devices() or aperture_remove_all_conflicting_devices() functions We handle this problem by introducing two static variables which record the firmware framebuffer's start addrness and end addrness. It assumes that the system has only one active firmware framebuffer driver at a time. We don't use the global structure screen_info here, because PCI resource may get reallocated(the VRAM BAR could be moved) at kernel boot stage. Cc: Thomas Zimmermann Cc: Javier Martinez Canillas Cc: Maarten Lankhorst Cc: Maxime Ripard Cc: David Airlie Cc: Daniel Vetter Cc: Helge Deller Signed-off-by: Sui Jingfeng --- drivers/gpu/drm/drm_aperture.c | 16 ++++++++++++++++ drivers/video/aperture.c | 29 +++++++++++++++++++++++++++++ include/drm/drm_aperture.h | 2 ++ include/linux/aperture.h | 7 +++++++ 4 files changed, 54 insertions(+) diff --git a/drivers/gpu/drm/drm_aperture.c b/drivers/gpu/drm/drm_aperture.c index 5729f3bb4398..6e5d8a08683c 100644 --- a/drivers/gpu/drm/drm_aperture.c +++ b/drivers/gpu/drm/drm_aperture.c @@ -190,3 +190,19 @@ int drm_aperture_remove_conflicting_pci_framebuffers(struct pci_dev *pdev, return aperture_remove_conflicting_pci_devices(pdev, req_driver->name); } EXPORT_SYMBOL(drm_aperture_remove_conflicting_pci_framebuffers); + +/** + * drm_aperture_contain_firmware_fb - Determine if a aperture contains firmware framebuffer + * + * @base: the aperture's base address in physical memory + * @size: aperture size in bytes + * + * Returns: + * true on if there is a firmware framebuffer belong to the aperture passed in, + * or false otherwise. + */ +bool drm_aperture_contain_firmware_fb(resource_size_t base, resource_size_t size) +{ + return aperture_contain_firmware_fb(base, base + size); +} +EXPORT_SYMBOL(drm_aperture_contain_firmware_fb); diff --git a/drivers/video/aperture.c b/drivers/video/aperture.c index 561be8feca96..5a5422cec669 100644 --- a/drivers/video/aperture.c +++ b/drivers/video/aperture.c @@ -141,6 +141,9 @@ struct aperture_range { static LIST_HEAD(apertures); static DEFINE_MUTEX(apertures_lock); +static resource_size_t firm_fb_start; +static resource_size_t firm_fb_end; + static bool overlap(resource_size_t base1, resource_size_t end1, resource_size_t base2, resource_size_t end2) { @@ -170,6 +173,9 @@ static int devm_aperture_acquire(struct device *dev, mutex_lock(&apertures_lock); + firm_fb_start = base; + firm_fb_end = end; + list_for_each(pos, &apertures) { ap = container_of(pos, struct aperture_range, lh); if (overlap(base, end, ap->base, ap->base + ap->size)) { @@ -377,3 +383,26 @@ int aperture_remove_conflicting_pci_devices(struct pci_dev *pdev, const char *na } EXPORT_SYMBOL(aperture_remove_conflicting_pci_devices); + +/** + * aperture_contain_firmware_fb - Detect if the firmware framebuffer belong to + * a aperture. + * @ap_start: the aperture's start address in physical memory + * @ap_end: the aperture's end address in physical memory + * + * Returns: + * true on if there is a firmware framebuffer belong to the aperture passed in, + * or false otherwise. + */ +bool aperture_contain_firmware_fb(resource_size_t ap_start, resource_size_t ap_end) +{ + /* No firmware framebuffer support */ + if (!firm_fb_start || !firm_fb_end) + return false; + + if (firm_fb_start >= ap_start && firm_fb_end <= ap_end) + return true; + + return false; +} +EXPORT_SYMBOL(aperture_contain_firmware_fb); diff --git a/include/drm/drm_aperture.h b/include/drm/drm_aperture.h index cbe33b49fd5d..6a0b9bacb081 100644 --- a/include/drm/drm_aperture.h +++ b/include/drm/drm_aperture.h @@ -35,4 +35,6 @@ drm_aperture_remove_framebuffers(const struct drm_driver *req_driver) req_driver); } +bool drm_aperture_contain_firmware_fb(resource_size_t base, resource_size_t size); + #endif diff --git a/include/linux/aperture.h b/include/linux/aperture.h index 1a9a88b11584..d4dc5917c49b 100644 --- a/include/linux/aperture.h +++ b/include/linux/aperture.h @@ -19,6 +19,8 @@ int aperture_remove_conflicting_devices(resource_size_t base, resource_size_t si int __aperture_remove_legacy_vga_devices(struct pci_dev *pdev); int aperture_remove_conflicting_pci_devices(struct pci_dev *pdev, const char *name); + +bool aperture_contain_firmware_fb(resource_size_t ap_start, resource_size_t ap_end); #else static inline int devm_aperture_acquire_for_platform_device(struct platform_device *pdev, resource_size_t base, @@ -42,6 +44,11 @@ static inline int aperture_remove_conflicting_pci_devices(struct pci_dev *pdev, { return 0; } + +static inline bool aperture_contain_firmware_fb(resource_size_t ap_start, resource_size_t ap_end) +{ + return false; +} #endif /** From patchwork Fri Jun 30 11:02:41 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sui Jingfeng X-Patchwork-Id: 13298026 X-Patchwork-Delegate: bhelgaas@google.com 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id BB78BEB64D7 for ; Fri, 30 Jun 2023 11:03:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231743AbjF3LDu (ORCPT ); Fri, 30 Jun 2023 07:03:50 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49210 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232346AbjF3LDV (ORCPT ); Fri, 30 Jun 2023 07:03:21 -0400 Received: from out-25.mta0.migadu.com (out-25.mta0.migadu.com [IPv6:2001:41d0:1004:224b::19]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 95CEA3AB4 for ; Fri, 30 Jun 2023 04:03:04 -0700 (PDT) X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1688122982; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=EXx1laixqm+HHOVy97jy9G+BpchN57Ar9LF8bARYYqo=; b=VNPbKeIR8sRX3g4KLjhAPjWT3+Dw8qjLslsLKcRpLqxLclxnmEr8TBNpeNKU+lwlEQ3U5W jCvAY5ApFhtTlExL03ASYm9EzmGHszg0JqUuMe5XHKdU1ZPVrxOQnYhnyHMNIZ0hhxSM/l ghryq+a3ypMHsQdq3SPASDlwhB9FWJk= From: Sui Jingfeng To: Alex Deucher , David Airlie , Daniel Vetter , Thomas Zimmermann , Maxime Ripard , Jani Nikula Cc: dri-devel@lists.freedesktop.org, amd-gfx@lists.freedesktop.org, linux-kernel@vger.kernel.org, intel-gfx@lists.freedesktop.org, nouveau@lists.freedesktop.org, linux-pci@vger.kernel.org, kvm@vger.kernel.org, linux-fbdev@vger.kernel.org, Sui Jingfeng , Christian Konig , Pan Xinhui , Joonas Lahtinen , Rodrigo Vivi , Tvrtko Ursulin , Ben Skeggs , Karol Herbst , Lyude Paul , Bjorn Helgaas , Alex Williamson , Maarten Lankhorst , Hawking Zhang , Mario Limonciello , Lijo Lazar , YiPeng Chai , Bokun Zhang , Likun Gao , Ville Syrjala , Jason Gunthorpe , Kevin Tian , Cornelia Huck , Yishai Hadas , Abhishek Sahu , Yi Liu Subject: [PATCH v1 2/4] PCI/VGA: Improve the default VGA device selection Date: Fri, 30 Jun 2023 19:02:41 +0800 Message-Id: <20230630110243.141671-3-sui.jingfeng@linux.dev> In-Reply-To: <20230630110243.141671-1-sui.jingfeng@linux.dev> References: <20230630110243.141671-1-sui.jingfeng@linux.dev> MIME-Version: 1.0 X-Migadu-Flow: FLOW_OUT Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org From: Sui Jingfeng Currently, the default VGA device selection is not perfect. Potential problems are: 1) This function is a no-op on non-x86 architectures. 2) It does not take the PCI Bar may get relocated into consideration. 3) It is not effective for the PCI device without a dedicated VRAM Bar. 4) It is device-agnostic, thus it has to waste the effort to iterate all of the PCI Bar to find the VRAM aperture. 5) It has invented lots of methods to determine which one is the default boot device on a multiple video card coexistence system. But this is still a policy because it doesn't give the user a choice to override. With the observation that device drivers or video aperture helpers may have better knowledge about which PCI bar contains the firmware FB, This patch tries to solve the above problems by introducing a function callback to the vga_client_register() function interface. DRM device drivers for the PCI device need to register the is_boot_device() function callback during the driver loading time. Once the driver binds the device successfully, VRAARB will call back to the driver. This gives the device drivers a chance to provide accurate boot device identification. Which in turn unlock the abitration service to non-x86 architectures. A device driver can also pass a NULL pointer to the keep the original behavior. This patch is to introduce the mechanism only, while the implementation is left to the authors of various device driver. Also honor the comment: "Clients have two callback mechanisms they can use" Cc: Alex Deucher Cc: Christian Konig Cc: Pan Xinhui Cc: David Airlie Cc: Daniel Vetter Cc: Jani Nikula Cc: Joonas Lahtinen Cc: Rodrigo Vivi Cc: Tvrtko Ursulin Cc: Ben Skeggs Cc: Karol Herbst Cc: Lyude Paul Cc: Bjorn Helgaas Cc: Alex Williamson Cc: Maarten Lankhorst Cc: Maxime Ripard Cc: Thomas Zimmermann Cc: Hawking Zhang Cc: Mario Limonciello Cc: Lijo Lazar Cc: YiPeng Chai Cc: Bokun Zhang Cc: Likun Gao Cc: Ville Syrjala Cc: Jason Gunthorpe CC: Kevin Tian Cc: Cornelia Huck Cc: Yishai Hadas Cc: Abhishek Sahu Cc: Yi Liu Reviewed-by: Lyude Paul # nouveau Signed-off-by: Sui Jingfeng --- drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 2 +- drivers/gpu/drm/i915/display/intel_vga.c | 3 +-- drivers/gpu/drm/nouveau/nouveau_vga.c | 2 +- drivers/gpu/drm/radeon/radeon_device.c | 2 +- drivers/pci/vgaarb.c | 21 ++++++++++++++++++++- drivers/vfio/pci/vfio_pci_core.c | 2 +- include/linux/vgaarb.h | 8 +++++--- 7 files changed, 30 insertions(+), 10 deletions(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c index e25f085ee886..c5bdf6eff29e 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c @@ -4082,7 +4082,7 @@ int amdgpu_device_init(struct amdgpu_device *adev, /* this will fail for cards that aren't VGA class devices, just * ignore it */ if ((adev->pdev->class >> 8) == PCI_CLASS_DISPLAY_VGA) - vga_client_register(adev->pdev, amdgpu_device_vga_set_decode); + vga_client_register(adev->pdev, amdgpu_device_vga_set_decode, NULL); px = amdgpu_device_supports_px(ddev); diff --git a/drivers/gpu/drm/i915/display/intel_vga.c b/drivers/gpu/drm/i915/display/intel_vga.c index 286a0bdd28c6..98d7d4dffe9f 100644 --- a/drivers/gpu/drm/i915/display/intel_vga.c +++ b/drivers/gpu/drm/i915/display/intel_vga.c @@ -115,7 +115,6 @@ intel_vga_set_decode(struct pci_dev *pdev, bool enable_decode) int intel_vga_register(struct drm_i915_private *i915) { - struct pci_dev *pdev = to_pci_dev(i915->drm.dev); int ret; @@ -127,7 +126,7 @@ int intel_vga_register(struct drm_i915_private *i915) * then we do not take part in VGA arbitration and the * vga_client_register() fails with -ENODEV. */ - ret = vga_client_register(pdev, intel_vga_set_decode); + ret = vga_client_register(pdev, intel_vga_set_decode, NULL); if (ret && ret != -ENODEV) return ret; diff --git a/drivers/gpu/drm/nouveau/nouveau_vga.c b/drivers/gpu/drm/nouveau/nouveau_vga.c index f8bf0ec26844..162b4f4676c7 100644 --- a/drivers/gpu/drm/nouveau/nouveau_vga.c +++ b/drivers/gpu/drm/nouveau/nouveau_vga.c @@ -92,7 +92,7 @@ nouveau_vga_init(struct nouveau_drm *drm) return; pdev = to_pci_dev(dev->dev); - vga_client_register(pdev, nouveau_vga_set_decode); + vga_client_register(pdev, nouveau_vga_set_decode, NULL); /* don't register Thunderbolt eGPU with vga_switcheroo */ if (pci_is_thunderbolt_attached(pdev)) diff --git a/drivers/gpu/drm/radeon/radeon_device.c b/drivers/gpu/drm/radeon/radeon_device.c index afbb3a80c0c6..71f2ff39d6a1 100644 --- a/drivers/gpu/drm/radeon/radeon_device.c +++ b/drivers/gpu/drm/radeon/radeon_device.c @@ -1425,7 +1425,7 @@ int radeon_device_init(struct radeon_device *rdev, /* if we have > 1 VGA cards, then disable the radeon VGA resources */ /* this will fail for cards that aren't VGA class devices, just * ignore it */ - vga_client_register(rdev->pdev, radeon_vga_set_decode); + vga_client_register(rdev->pdev, radeon_vga_set_decode, NULL); if (rdev->flags & RADEON_IS_PX) runtime = true; diff --git a/drivers/pci/vgaarb.c b/drivers/pci/vgaarb.c index 17bd1268c36a..99d6f1f9b789 100644 --- a/drivers/pci/vgaarb.c +++ b/drivers/pci/vgaarb.c @@ -53,6 +53,7 @@ struct vga_device { bool bridge_has_one_vga; bool is_firmware_default; /* device selected by firmware */ unsigned int (*set_decode)(struct pci_dev *pdev, bool decode); + bool (*is_boot_device)(struct pci_dev *pdev); }; static LIST_HEAD(vga_list); @@ -969,6 +970,10 @@ EXPORT_SYMBOL(vga_set_legacy_decoding); * @set_decode callback: If a client can disable its GPU VGA resource, it * will get a callback from this to set the encode/decode state. * + * @is_boot_device: callback to the device driver, query if a client is the + * default boot device, as the device driver typically has better knowledge + * if specific device is the boot device. But this callback is optional. + * * Rationale: we cannot disable VGA decode resources unconditionally, some * single GPU laptops seem to require ACPI or BIOS access to the VGA registers * to control things like backlights etc. Hopefully newer multi-GPU laptops do @@ -984,7 +989,8 @@ EXPORT_SYMBOL(vga_set_legacy_decoding); * Returns: 0 on success, -1 on failure */ int vga_client_register(struct pci_dev *pdev, - unsigned int (*set_decode)(struct pci_dev *pdev, bool decode)) + unsigned int (*set_decode)(struct pci_dev *pdev, bool decode), + bool (*is_boot_device)(struct pci_dev *pdev)) { int ret = -ENODEV; struct vga_device *vgadev; @@ -996,6 +1002,7 @@ int vga_client_register(struct pci_dev *pdev, goto bail; vgadev->set_decode = set_decode; + vgadev->is_boot_device = is_boot_device; ret = 0; bail: @@ -1521,6 +1528,18 @@ static int pci_notify(struct notifier_block *nb, unsigned long action, notify = vga_arbiter_add_pci_device(pdev); else if (action == BUS_NOTIFY_DEL_DEVICE) notify = vga_arbiter_del_pci_device(pdev); + else if (action == BUS_NOTIFY_BOUND_DRIVER) { + struct vga_device *vgadev = vgadev_find(pdev); + + if (vgadev && vgadev->is_boot_device) { + bool boot_dev = vgadev->is_boot_device(pdev); + + if (boot_dev) { + vgaarb_info(dev, "Overriding as boot device\n"); + vga_set_default_device(pdev); + } + } + } vgaarb_dbg(dev, "%s: action = %lu\n", __func__, action); diff --git a/drivers/vfio/pci/vfio_pci_core.c b/drivers/vfio/pci/vfio_pci_core.c index a5ab416cf476..2a8873a330ba 100644 --- a/drivers/vfio/pci/vfio_pci_core.c +++ b/drivers/vfio/pci/vfio_pci_core.c @@ -2067,7 +2067,7 @@ static int vfio_pci_vga_init(struct vfio_pci_core_device *vdev) if (ret) return ret; - ret = vga_client_register(pdev, vfio_pci_set_decode); + ret = vga_client_register(pdev, vfio_pci_set_decode, NULL); if (ret) return ret; vga_set_legacy_decoding(pdev, vfio_pci_set_decode(pdev, false)); diff --git a/include/linux/vgaarb.h b/include/linux/vgaarb.h index 97129a1bbb7d..dfde5a6ba55a 100644 --- a/include/linux/vgaarb.h +++ b/include/linux/vgaarb.h @@ -33,7 +33,8 @@ struct pci_dev *vga_default_device(void); void vga_set_default_device(struct pci_dev *pdev); int vga_remove_vgacon(struct pci_dev *pdev); int vga_client_register(struct pci_dev *pdev, - unsigned int (*set_decode)(struct pci_dev *pdev, bool state)); + unsigned int (*set_decode)(struct pci_dev *pdev, bool state), + bool (*is_boot_device)(struct pci_dev *pdev)); #else /* CONFIG_VGA_ARB */ static inline void vga_set_legacy_decoding(struct pci_dev *pdev, unsigned int decodes) @@ -59,7 +60,8 @@ static inline int vga_remove_vgacon(struct pci_dev *pdev) return 0; } static inline int vga_client_register(struct pci_dev *pdev, - unsigned int (*set_decode)(struct pci_dev *pdev, bool state)) + unsigned int (*set_decode)(struct pci_dev *pdev, bool state), + bool (*is_boot_device)(struct pci_dev *pdev)) { return 0; } @@ -97,7 +99,7 @@ static inline int vga_get_uninterruptible(struct pci_dev *pdev, static inline void vga_client_unregister(struct pci_dev *pdev) { - vga_client_register(pdev, NULL); + vga_client_register(pdev, NULL, NULL); } #endif /* LINUX_VGA_H */ From patchwork Fri Jun 30 11:02:42 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sui Jingfeng X-Patchwork-Id: 13298027 X-Patchwork-Delegate: bhelgaas@google.com 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 16AE4EB64DA for ; Fri, 30 Jun 2023 11:03:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232097AbjF3LDx (ORCPT ); Fri, 30 Jun 2023 07:03:53 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49006 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231393AbjF3LDX (ORCPT ); Fri, 30 Jun 2023 07:03:23 -0400 Received: from out-11.mta0.migadu.com (out-11.mta0.migadu.com [91.218.175.11]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 17AC13C0D for ; Fri, 30 Jun 2023 04:03:08 -0700 (PDT) X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1688122987; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=9VT31crvj/hSyen+1yeJunQKIe6CJXCWJLM4jAJyVsI=; b=baipea9BUYs+P0aSm1rKe8ypQy05pAEnnX7yI+xyO3DhMiuV88ZCgKuCedMWIPlu3wl0ii sidhXI/6FlI7dKPOv9whb+Z5DbTB4LHG7HmNOGxpJ8Gb61ZM+dJPIagjFPFg3w4wuSHtRv FVowlwMUWuFeVO9zZjqa4KX7snhvraM= From: Sui Jingfeng To: Alex Deucher , David Airlie , Daniel Vetter , Thomas Zimmermann , Maxime Ripard , Jani Nikula Cc: dri-devel@lists.freedesktop.org, amd-gfx@lists.freedesktop.org, linux-kernel@vger.kernel.org, intel-gfx@lists.freedesktop.org, nouveau@lists.freedesktop.org, linux-pci@vger.kernel.org, kvm@vger.kernel.org, linux-fbdev@vger.kernel.org, Sui Jingfeng , Christian Konig , Pan Xinhui , Hawking Zhang , Mario Limonciello , Lijo Lazar , YiPeng Chai , Bokun Zhang , Likun Gao Subject: [PATCH v1 3/4] drm/amdgpu: Implement the is_boot_device callback function Date: Fri, 30 Jun 2023 19:02:42 +0800 Message-Id: <20230630110243.141671-4-sui.jingfeng@linux.dev> In-Reply-To: <20230630110243.141671-1-sui.jingfeng@linux.dev> References: <20230630110243.141671-1-sui.jingfeng@linux.dev> MIME-Version: 1.0 X-Migadu-Flow: FLOW_OUT Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org From: Sui Jingfeng [why] The vga_is_firmware_default() defined in drivers/pci/vgaarb.c is arch-dependent, it's a dummy on non-x86 architectures currently. This made VGAARB lost an important condition for the arbitration. It could still be wrong even if we remove the #ifdef and #endif guards. because the PCI bar will move (resource re-allocation). [how] The device that owns the firmware framebuffer should be the default boot device. This patch adds an arch-independent function to enforce this rule. The vgaarb subsystem will call back to amdgpu_is_boot_device() function when drm/amdgpu is successfully bound to an AMDGPU device. Cc: Alex Deucher Cc: Christian Konig Cc: Pan Xinhui Cc: David Airlie Cc: Daniel Vetter Cc: Hawking Zhang Cc: Mario Limonciello Cc: Lijo Lazar Cc: YiPeng Chai Cc: Bokun Zhang CC: Likun Gao Signed-off-by: Sui Jingfeng --- drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c index c5bdf6eff29e..2f54250f9d58 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c @@ -3673,6 +3673,15 @@ static const struct attribute *amdgpu_dev_attributes[] = { NULL }; +static bool amdgpu_is_boot_device(struct pci_dev *pdev) +{ + struct drm_device *dev = pci_get_drvdata(pdev); + struct amdgpu_device *adev = drm_to_adev(dev); + struct amdgpu_gmc *gmc = &adev->gmc; + + return drm_aperture_contain_firmware_fb(gmc->aper_base, gmc->aper_size); +} + /** * amdgpu_device_init - initialize the driver * @@ -4082,7 +4091,8 @@ int amdgpu_device_init(struct amdgpu_device *adev, /* this will fail for cards that aren't VGA class devices, just * ignore it */ if ((adev->pdev->class >> 8) == PCI_CLASS_DISPLAY_VGA) - vga_client_register(adev->pdev, amdgpu_device_vga_set_decode, NULL); + vga_client_register(adev->pdev, amdgpu_device_vga_set_decode, + amdgpu_is_boot_device); px = amdgpu_device_supports_px(ddev); From patchwork Fri Jun 30 11:02:43 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sui Jingfeng X-Patchwork-Id: 13298028 X-Patchwork-Delegate: bhelgaas@google.com 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 507FDC001B0 for ; Fri, 30 Jun 2023 11:03:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231393AbjF3LDy (ORCPT ); Fri, 30 Jun 2023 07:03:54 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49410 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232200AbjF3LDZ (ORCPT ); Fri, 30 Jun 2023 07:03:25 -0400 Received: from out-59.mta0.migadu.com (out-59.mta0.migadu.com [IPv6:2001:41d0:1004:224b::3b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3A3D73C12 for ; Fri, 30 Jun 2023 04:03:12 -0700 (PDT) X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1688122990; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=btfhp53flz2znRJhVRVROxzr2+xJwf5jWKVzzdMQNCg=; b=T73HFHyypfPukJHUCivjqAqiND6lcrXP+g0ZSla4MUTvXmqJbQrwuT16aoxpOada4b8PuN Zb0G/hybooeV4zLJKuZI6dmV348rzV47I3c7QaAf/CWaoV1LLUZGqtqBRZZ0N54w/EswIc 92ry4Yxu6TJa1mUgnhkXb/bif7YjLxY= From: Sui Jingfeng To: Alex Deucher , David Airlie , Daniel Vetter , Thomas Zimmermann , Maxime Ripard , Jani Nikula Cc: dri-devel@lists.freedesktop.org, amd-gfx@lists.freedesktop.org, linux-kernel@vger.kernel.org, intel-gfx@lists.freedesktop.org, nouveau@lists.freedesktop.org, linux-pci@vger.kernel.org, kvm@vger.kernel.org, linux-fbdev@vger.kernel.org, Sui Jingfeng , Christian Konig , Pan Xinhui Subject: [PATCH v1 4/4] drm/radeon: Implement the is_boot_device callback function Date: Fri, 30 Jun 2023 19:02:43 +0800 Message-Id: <20230630110243.141671-5-sui.jingfeng@linux.dev> In-Reply-To: <20230630110243.141671-1-sui.jingfeng@linux.dev> References: <20230630110243.141671-1-sui.jingfeng@linux.dev> MIME-Version: 1.0 X-Migadu-Flow: FLOW_OUT Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org From: Sui Jingfeng [why] The vga_is_firmware_default() defined in drivers/pci/vgaarb.c is arch-dependent, it's a dummy on non-x86 architectures currently. This made VGAARB lost an important condition for the arbitration. It could still be wrong even if we remove the #ifdef and #endif guards. because the PCI bar will move (resource re-allocation). [how] The device that owns the firmware framebuffer should be the default boot device. This patch adds an arch-independent function to enforce this rule. The vgaarb subsystem will call back to radeon_is_boot_device() function when drm/radeon is successfully bound to a radeon GPU device. Cc: Alex Deucher Cc: Christian Konig Cc: Pan Xinhui Cc: David Airlie Cc: Daniel Vetter Signed-off-by: Sui Jingfeng --- drivers/gpu/drm/radeon/radeon_device.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/radeon/radeon_device.c b/drivers/gpu/drm/radeon/radeon_device.c index 71f2ff39d6a1..afb49000830c 100644 --- a/drivers/gpu/drm/radeon/radeon_device.c +++ b/drivers/gpu/drm/radeon/radeon_device.c @@ -34,6 +34,7 @@ #include #include +#include #include #include #include @@ -1263,6 +1264,15 @@ static const struct vga_switcheroo_client_ops radeon_switcheroo_ops = { .can_switch = radeon_switcheroo_can_switch, }; +static bool radeon_is_boot_device(struct pci_dev *pdev) +{ + struct drm_device *dev = pci_get_drvdata(pdev); + struct radeon_device *rdev = dev->dev_private; + struct radeon_mc *gmc = &rdev->mc; + + return drm_aperture_contain_firmware_fb(gmc->aper_base, gmc->aper_size); +} + /** * radeon_device_init - initialize the driver * @@ -1425,7 +1435,7 @@ int radeon_device_init(struct radeon_device *rdev, /* if we have > 1 VGA cards, then disable the radeon VGA resources */ /* this will fail for cards that aren't VGA class devices, just * ignore it */ - vga_client_register(rdev->pdev, radeon_vga_set_decode, NULL); + vga_client_register(rdev->pdev, radeon_vga_set_decode, radeon_is_boot_device); if (rdev->flags & RADEON_IS_PX) runtime = true;