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Wed, 28 Jul 2021 10:27:36 +0000 Subject: Re: [PATCH 01/14] drm/amdgpu: Convert to Linux IRQ interfaces To: Thomas Zimmermann , daniel@ffwll.ch, airlied@linux.ie, alexander.deucher@amd.com, liviu.dudau@arm.com, brian.starkey@arm.com, sam@ravnborg.org, bbrezillon@kernel.org, nicolas.ferre@microchip.com, maarten.lankhorst@linux.intel.com, mripard@kernel.org, stefan@agner.ch, alison.wang@nxp.com, patrik.r.jakobsson@gmail.com, anitha.chrisanthus@intel.com, robdclark@gmail.com, edmund.j.dea@intel.com, sean@poorly.run, shawnguo@kernel.org, s.hauer@pengutronix.de, kernel@pengutronix.de, jyri.sarha@iki.fi, tomba@kernel.org Cc: amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org, freedreno@lists.freedesktop.org References: <20210727182721.17981-1-tzimmermann@suse.de> <20210727182721.17981-2-tzimmermann@suse.de> From: =?UTF-8?Q?Christian_K=c3=b6nig?= Message-ID: <24a8b2ab-ef38-219b-99d4-806a44fa6aba@amd.com> Date: Wed, 28 Jul 2021 12:27:13 +0200 User-Agent: Mozilla/5.0 (X11; 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DRM's > IRQ helpers are mostly useful for UMS drivers. Modern KMS drivers > don't benefit from using it. > > DRM IRQ callbacks are now being called directly or inlined. > > The interrupt number returned by pci_msi_vector() is now stored > in struct amdgpu_irq. Calls to pci_msi_vector() can fail and return > a negative errno code. Abort initlaizaton in thi case. The DRM IRQ > midlayer does not handle this correctly. > > Signed-off-by: Thomas Zimmermann Alex needs to take a look at this as well, but of hand the patch is Acked-by: Christian König . Thanks, Christian. > --- > drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 1 - > drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c | 21 ++++++++++++++------- > drivers/gpu/drm/amd/amdgpu/amdgpu_irq.h | 2 +- > 3 files changed, 15 insertions(+), 9 deletions(-) > > diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c > index 2bd13fc2541a..1e05b5aa94e7 100644 > --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c > +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c > @@ -1775,7 +1775,6 @@ static const struct drm_driver amdgpu_kms_driver = { > .open = amdgpu_driver_open_kms, > .postclose = amdgpu_driver_postclose_kms, > .lastclose = amdgpu_driver_lastclose_kms, > - .irq_handler = amdgpu_irq_handler, > .ioctls = amdgpu_ioctls_kms, > .num_ioctls = ARRAY_SIZE(amdgpu_ioctls_kms), > .dumb_create = amdgpu_mode_dumb_create, > diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c > index 0d01cfaca77e..a36cdc7323f4 100644 > --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c > +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c > @@ -46,7 +46,6 @@ > #include > > #include > -#include > #include > #include > #include > @@ -184,7 +183,7 @@ void amdgpu_irq_disable_all(struct amdgpu_device *adev) > * Returns: > * result of handling the IRQ, as defined by &irqreturn_t > */ > -irqreturn_t amdgpu_irq_handler(int irq, void *arg) > +static irqreturn_t amdgpu_irq_handler(int irq, void *arg) > { > struct drm_device *dev = (struct drm_device *) arg; > struct amdgpu_device *adev = drm_to_adev(dev); > @@ -307,6 +306,7 @@ static void amdgpu_restore_msix(struct amdgpu_device *adev) > int amdgpu_irq_init(struct amdgpu_device *adev) > { > int r = 0; > + unsigned int irq; > > spin_lock_init(&adev->irq.lock); > > @@ -349,15 +349,22 @@ int amdgpu_irq_init(struct amdgpu_device *adev) > INIT_WORK(&adev->irq.ih2_work, amdgpu_irq_handle_ih2); > INIT_WORK(&adev->irq.ih_soft_work, amdgpu_irq_handle_ih_soft); > > - adev->irq.installed = true; > - /* Use vector 0 for MSI-X */ > - r = drm_irq_install(adev_to_drm(adev), pci_irq_vector(adev->pdev, 0)); > + /* Use vector 0 for MSI-X. */ > + r = pci_irq_vector(adev->pdev, 0); > + if (r < 0) > + return r; > + irq = r; > + > + /* PCI devices require shared interrupts. */ > + r = request_irq(irq, amdgpu_irq_handler, IRQF_SHARED, adev_to_drm(adev)->driver->name, > + adev_to_drm(adev)); > if (r) { > - adev->irq.installed = false; > if (!amdgpu_device_has_dc_support(adev)) > flush_work(&adev->hotplug_work); > return r; > } > + adev->irq.installed = true; > + adev->irq.irq = irq; > adev_to_drm(adev)->max_vblank_count = 0x00ffffff; > > DRM_DEBUG("amdgpu: irq initialized.\n"); > @@ -368,7 +375,7 @@ int amdgpu_irq_init(struct amdgpu_device *adev) > void amdgpu_irq_fini_hw(struct amdgpu_device *adev) > { > if (adev->irq.installed) { > - drm_irq_uninstall(&adev->ddev); > + free_irq(adev->irq.irq, adev_to_drm(adev)); > adev->irq.installed = false; > if (adev->irq.msi_enabled) > pci_free_irq_vectors(adev->pdev); > diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.h > index 78ad4784cc74..e9f2c11ea416 100644 > --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.h > +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.h > @@ -80,6 +80,7 @@ struct amdgpu_irq_src_funcs { > > struct amdgpu_irq { > bool installed; > + unsigned int irq; > spinlock_t lock; > /* interrupt sources */ > struct amdgpu_irq_client client[AMDGPU_IRQ_CLIENTID_MAX]; > @@ -100,7 +101,6 @@ struct amdgpu_irq { > }; > > void amdgpu_irq_disable_all(struct amdgpu_device *adev); > -irqreturn_t amdgpu_irq_handler(int irq, void *arg); > > int amdgpu_irq_init(struct amdgpu_device *adev); > void amdgpu_irq_fini_sw(struct amdgpu_device *adev); 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 X-Spam-Level: X-Spam-Status: No, score=-16.2 required=3.0 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MN2PR12MB3775.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 28 Jul 2021 10:27:36.3151 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: dA4jfKnjfxLae+o3MWfi2AJs1lS2g8z+8z0qI4Z2YoyOS8iqKvNCjy/bYc+ZZ0VY X-MS-Exchange-Transport-CrossTenantHeadersStamped: BL0PR12MB2577 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org, freedreno@lists.freedesktop.org, dri-devel@lists.freedesktop.org, amd-gfx@lists.freedesktop.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Am 27.07.21 um 20:27 schrieb Thomas Zimmermann: > Drop the DRM IRQ midlayer in favor of Linux IRQ interfaces. DRM's > IRQ helpers are mostly useful for UMS drivers. Modern KMS drivers > don't benefit from using it. > > DRM IRQ callbacks are now being called directly or inlined. > > The interrupt number returned by pci_msi_vector() is now stored > in struct amdgpu_irq. Calls to pci_msi_vector() can fail and return > a negative errno code. Abort initlaizaton in thi case. The DRM IRQ > midlayer does not handle this correctly. > > Signed-off-by: Thomas Zimmermann Alex needs to take a look at this as well, but of hand the patch is Acked-by: Christian König . Thanks, Christian. > --- > drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 1 - > drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c | 21 ++++++++++++++------- > drivers/gpu/drm/amd/amdgpu/amdgpu_irq.h | 2 +- > 3 files changed, 15 insertions(+), 9 deletions(-) > > diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c > index 2bd13fc2541a..1e05b5aa94e7 100644 > --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c > +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c > @@ -1775,7 +1775,6 @@ static const struct drm_driver amdgpu_kms_driver = { > .open = amdgpu_driver_open_kms, > .postclose = amdgpu_driver_postclose_kms, > .lastclose = amdgpu_driver_lastclose_kms, > - .irq_handler = amdgpu_irq_handler, > .ioctls = amdgpu_ioctls_kms, > .num_ioctls = ARRAY_SIZE(amdgpu_ioctls_kms), > .dumb_create = amdgpu_mode_dumb_create, > diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c > index 0d01cfaca77e..a36cdc7323f4 100644 > --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c > +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c > @@ -46,7 +46,6 @@ > #include > > #include > -#include > #include > #include > #include > @@ -184,7 +183,7 @@ void amdgpu_irq_disable_all(struct amdgpu_device *adev) > * Returns: > * result of handling the IRQ, as defined by &irqreturn_t > */ > -irqreturn_t amdgpu_irq_handler(int irq, void *arg) > +static irqreturn_t amdgpu_irq_handler(int irq, void *arg) > { > struct drm_device *dev = (struct drm_device *) arg; > struct amdgpu_device *adev = drm_to_adev(dev); > @@ -307,6 +306,7 @@ static void amdgpu_restore_msix(struct amdgpu_device *adev) > int amdgpu_irq_init(struct amdgpu_device *adev) > { > int r = 0; > + unsigned int irq; > > spin_lock_init(&adev->irq.lock); > > @@ -349,15 +349,22 @@ int amdgpu_irq_init(struct amdgpu_device *adev) > INIT_WORK(&adev->irq.ih2_work, amdgpu_irq_handle_ih2); > INIT_WORK(&adev->irq.ih_soft_work, amdgpu_irq_handle_ih_soft); > > - adev->irq.installed = true; > - /* Use vector 0 for MSI-X */ > - r = drm_irq_install(adev_to_drm(adev), pci_irq_vector(adev->pdev, 0)); > + /* Use vector 0 for MSI-X. */ > + r = pci_irq_vector(adev->pdev, 0); > + if (r < 0) > + return r; > + irq = r; > + > + /* PCI devices require shared interrupts. */ > + r = request_irq(irq, amdgpu_irq_handler, IRQF_SHARED, adev_to_drm(adev)->driver->name, > + adev_to_drm(adev)); > if (r) { > - adev->irq.installed = false; > if (!amdgpu_device_has_dc_support(adev)) > flush_work(&adev->hotplug_work); > return r; > } > + adev->irq.installed = true; > + adev->irq.irq = irq; > adev_to_drm(adev)->max_vblank_count = 0x00ffffff; > > DRM_DEBUG("amdgpu: irq initialized.\n"); > @@ -368,7 +375,7 @@ int amdgpu_irq_init(struct amdgpu_device *adev) > void amdgpu_irq_fini_hw(struct amdgpu_device *adev) > { > if (adev->irq.installed) { > - drm_irq_uninstall(&adev->ddev); > + free_irq(adev->irq.irq, adev_to_drm(adev)); > adev->irq.installed = false; > if (adev->irq.msi_enabled) > pci_free_irq_vectors(adev->pdev); > diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.h > index 78ad4784cc74..e9f2c11ea416 100644 > --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.h > +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.h > @@ -80,6 +80,7 @@ struct amdgpu_irq_src_funcs { > > struct amdgpu_irq { > bool installed; > + unsigned int irq; > spinlock_t lock; > /* interrupt sources */ > struct amdgpu_irq_client client[AMDGPU_IRQ_CLIENTID_MAX]; > @@ -100,7 +101,6 @@ struct amdgpu_irq { > }; > > void amdgpu_irq_disable_all(struct amdgpu_device *adev); > -irqreturn_t amdgpu_irq_handler(int irq, void *arg); > > int amdgpu_irq_init(struct amdgpu_device *adev); > void amdgpu_irq_fini_sw(struct amdgpu_device *adev); 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 X-Spam-Level: X-Spam-Status: No, score=-15.3 required=3.0 tests=BAYES_00,DKIM_INVALID, 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lists.freedesktop.org; dmarc=none action=none header.from=amd.com; Received: from MN2PR12MB3775.namprd12.prod.outlook.com (2603:10b6:208:159::19) by BL0PR12MB2577.namprd12.prod.outlook.com (2603:10b6:207:42::20) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4352.29; Wed, 28 Jul 2021 10:27:36 +0000 Received: from MN2PR12MB3775.namprd12.prod.outlook.com ([fe80::6c9e:1e08:7617:f756]) by MN2PR12MB3775.namprd12.prod.outlook.com ([fe80::6c9e:1e08:7617:f756%5]) with mapi id 15.20.4352.031; Wed, 28 Jul 2021 10:27:36 +0000 Subject: Re: [PATCH 01/14] drm/amdgpu: Convert to Linux IRQ interfaces To: Thomas Zimmermann , daniel@ffwll.ch, airlied@linux.ie, alexander.deucher@amd.com, liviu.dudau@arm.com, brian.starkey@arm.com, sam@ravnborg.org, bbrezillon@kernel.org, nicolas.ferre@microchip.com, maarten.lankhorst@linux.intel.com, mripard@kernel.org, stefan@agner.ch, alison.wang@nxp.com, patrik.r.jakobsson@gmail.com, anitha.chrisanthus@intel.com, 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