From patchwork Tue Apr 1 07:57:10 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Boris Brezillon X-Patchwork-Id: 14034437 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 26F25C36014 for ; Tue, 1 Apr 2025 07:57:22 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 8DF9410E03E; Tue, 1 Apr 2025 07:57:21 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=collabora.com header.i=@collabora.com header.b="hK5HCxH2"; dkim-atps=neutral Received: from bali.collaboradmins.com (bali.collaboradmins.com [148.251.105.195]) by gabe.freedesktop.org (Postfix) with ESMTPS id 4EB3810E509 for ; Tue, 1 Apr 2025 07:57:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1743494235; bh=OKFZdqeQq6hBjg7dyZWhat15VRZAsjtAPIGumsh+dcw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=hK5HCxH2VvFk1IWcj8esrttm0yui3lZe6Ef3eag+x9BJyOVe7YPsxBolA5EEtjCRA U6ec8VFJlKDfmkGE65HGlCy5xayOJPZh387ewFJ+Kf/Ee1AG6TKy4khw3nw2FTrQ5m Ye2h8keM5+keGBwId36qt1HxNdS3yE1I7ftKh5t9sN0bqCiQpxOIo6Ki2kGUMOBu23 mQrAfDEPBbWcy71Azr8ribP0kqm7kv1E3QzUhyrbtFhVQ/OOEkZoRNiJzAIXsJZ+ks PTIfK2zZSBlBZMkib4nm0CYCPXBmtiKgxKksF8ZxVcfhOGt1wxmO0o7k1UO9hH4P/Z FLXuAapsHFuBg== Received: from localhost.localdomain (unknown [IPv6:2a01:e0a:2c:6930:5cf4:84a1:2763:fe0d]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: bbrezillon) by bali.collaboradmins.com (Postfix) with ESMTPSA id 6E46717E0FCC; Tue, 1 Apr 2025 09:57:15 +0200 (CEST) From: Boris Brezillon To: Boris Brezillon , Steven Price , Liviu Dudau , =?utf-8?q?Adri=C3=A1n_Larumbe?= Cc: dri-devel@lists.freedesktop.org, kernel@collabora.com Subject: [PATCH 3/3] drm/panthor: Let IRQ handlers clear the interrupts themselves Date: Tue, 1 Apr 2025 09:57:10 +0200 Message-ID: <20250401075710.2638950-4-boris.brezillon@collabora.com> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250401075710.2638950-1-boris.brezillon@collabora.com> References: <20250401075710.2638950-1-boris.brezillon@collabora.com> MIME-Version: 1.0 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: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" MMU handler needs to be in control of the job interrupt clears because clearing the interrupt also unblocks the writer/reader that triggered the fault, and we don't want it to be unblocked until we've had a chance to process the IRQ. Since clearing the clearing is just one line, let's make it explicit instead of doing it in the generic code path. Signed-off-by: Boris Brezillon --- drivers/gpu/drm/panthor/panthor_device.h | 2 -- drivers/gpu/drm/panthor/panthor_fw.c | 2 ++ drivers/gpu/drm/panthor/panthor_gpu.c | 2 ++ drivers/gpu/drm/panthor/panthor_mmu.c | 2 ++ 4 files changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/panthor/panthor_device.h b/drivers/gpu/drm/panthor/panthor_device.h index da6574021664..4c27b6d85f46 100644 --- a/drivers/gpu/drm/panthor/panthor_device.h +++ b/drivers/gpu/drm/panthor/panthor_device.h @@ -383,8 +383,6 @@ static irqreturn_t panthor_ ## __name ## _irq_threaded_handler(int irq, void *da if (!status) \ break; \ \ - gpu_write(ptdev, __reg_prefix ## _INT_CLEAR, status); \ - \ __handler(ptdev, status); \ ret = IRQ_HANDLED; \ } \ diff --git a/drivers/gpu/drm/panthor/panthor_fw.c b/drivers/gpu/drm/panthor/panthor_fw.c index 0f52766a3120..446bb377b953 100644 --- a/drivers/gpu/drm/panthor/panthor_fw.c +++ b/drivers/gpu/drm/panthor/panthor_fw.c @@ -1008,6 +1008,8 @@ static void panthor_fw_init_global_iface(struct panthor_device *ptdev) static void panthor_job_irq_handler(struct panthor_device *ptdev, u32 status) { + gpu_write(ptdev, JOB_INT_CLEAR, status); + if (!ptdev->fw->booted && (status & JOB_INT_GLOBAL_IF)) ptdev->fw->booted = true; diff --git a/drivers/gpu/drm/panthor/panthor_gpu.c b/drivers/gpu/drm/panthor/panthor_gpu.c index 671049020afa..32d678a0114e 100644 --- a/drivers/gpu/drm/panthor/panthor_gpu.c +++ b/drivers/gpu/drm/panthor/panthor_gpu.c @@ -150,6 +150,8 @@ static void panthor_gpu_init_info(struct panthor_device *ptdev) static void panthor_gpu_irq_handler(struct panthor_device *ptdev, u32 status) { + gpu_write(ptdev, GPU_INT_CLEAR, status); + if (status & GPU_IRQ_FAULT) { u32 fault_status = gpu_read(ptdev, GPU_FAULT_STATUS); u64 address = ((u64)gpu_read(ptdev, GPU_FAULT_ADDR_HI) << 32) | diff --git a/drivers/gpu/drm/panthor/panthor_mmu.c b/drivers/gpu/drm/panthor/panthor_mmu.c index 7cca97d298ea..1ecb20bfbc92 100644 --- a/drivers/gpu/drm/panthor/panthor_mmu.c +++ b/drivers/gpu/drm/panthor/panthor_mmu.c @@ -1669,6 +1669,8 @@ static void panthor_mmu_irq_handler(struct panthor_device *ptdev, u32 status) { bool has_unhandled_faults = false; + gpu_write(ptdev, MMU_INT_CLEAR, status); + status = panthor_mmu_fault_mask(ptdev, status); while (status) { u32 as = ffs(status | (status >> 16)) - 1;