From patchwork Thu Nov 28 21:06:19 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Adri=C3=A1n_Larumbe?= X-Patchwork-Id: 13888335 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 0DC12D70DEE for ; Thu, 28 Nov 2024 21:13:00 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 8ACFC10ED62; Thu, 28 Nov 2024 21:12:59 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (1024-bit key; unprotected) header.d=collabora.com header.i=adrian.larumbe@collabora.com header.b="KMbNT9Au"; dkim-atps=neutral Received: from sender4-pp-f112.zoho.com (sender4-pp-f112.zoho.com [136.143.188.112]) by gabe.freedesktop.org (Postfix) with ESMTPS id 45C2210ED62 for ; Thu, 28 Nov 2024 21:12:54 +0000 (UTC) ARC-Seal: i=1; a=rsa-sha256; t=1732828366; cv=none; d=zohomail.com; s=zohoarc; b=HG41YBfhRINc8HLm+FUETI/VPXlnra1ojIcjBskQW3mL0pir95PyEDWl2aJCrCiZvmoN9AGwY3yaFoDkj+dpzowFPjyc6PNvBXTJiHl3gKZ3PEYSmFL8KpRq1v0tGRZMCrAH+vIbsKKJVXadfRAGf0vm3B1kl8ZiyWObtXksXug= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1732828366; h=Content-Type:Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:MIME-Version:Message-ID:References:Subject:Subject:To:To:Message-Id:Reply-To; bh=4KMeDqmO6/kMqWAURl+BuWqqDuQXnOAKVcXkzDnRlbQ=; b=EoKfNHUuLE+qKj+LLLeKUqlmkdxwt0k1Pw6TBVeVBsDARE6xJuLc7LK3q0x7tiUK2Brr3ji2udDzKg/IDHQ8s9bhQfGi5p2C/IYHSwo8NQw990qCdB3mhNEQD2CIEMZLdYqh1nTKMvFwBH2c4Mpy1NDVCZJOmr0EEGGqUZF8NqI= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass header.i=collabora.com; spf=pass smtp.mailfrom=adrian.larumbe@collabora.com; dmarc=pass header.from= DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; t=1732828366; s=zohomail; d=collabora.com; i=adrian.larumbe@collabora.com; h=From:From:To:To:Cc:Cc:Subject:Subject:Date:Date:Message-ID:In-Reply-To:References:MIME-Version:Content-Type:Content-Transfer-Encoding:Message-Id:Reply-To; bh=4KMeDqmO6/kMqWAURl+BuWqqDuQXnOAKVcXkzDnRlbQ=; b=KMbNT9AuRvt7iwGH9LliiiOVNzebKw0yCw5ReyxGamwV4HsqDwGLh195+zmzXjV/ uCx4WY2t4cXCRBHctYFDTVmvvmt5K9+ejplVzatrTixi2XWr/YDKjToeL25uHBLyybx cb31nWrGUNuTQ2Wwf9nKJPotgwJfCC2/STrmbQMc= Received: by mx.zohomail.com with SMTPS id 1732828366344785.3465141422423; Thu, 28 Nov 2024 13:12:46 -0800 (PST) From: =?utf-8?q?Adri=C3=A1n_Larumbe?= To: Boris Brezillon , Rob Herring , Steven Price , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Philipp Zabel Cc: kernel@collabora.com, =?utf-8?q?Adri=C3=A1n_Larumbe?= , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 4/8] drm/panfrost: Handle error when allocating AS number Date: Thu, 28 Nov 2024 21:06:19 +0000 Message-ID: <20241128211223.1805830-5-adrian.larumbe@collabora.com> X-Mailer: git-send-email 2.47.0 In-Reply-To: <20241128211223.1805830-1-adrian.larumbe@collabora.com> References: <20241128211223.1805830-1-adrian.larumbe@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" If we reach the beginning of the LRU AS list, then return an error. Signed-off-by: Adrián Larumbe --- drivers/gpu/drm/panfrost/panfrost_job.c | 6 +++++- drivers/gpu/drm/panfrost/panfrost_mmu.c | 5 +++-- drivers/gpu/drm/panfrost/panfrost_mmu.h | 2 +- drivers/gpu/drm/panfrost/panfrost_perfcnt.c | 9 ++++++++- 4 files changed, 17 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/panfrost/panfrost_job.c b/drivers/gpu/drm/panfrost/panfrost_job.c index 3f4f0682d69d..fba1a376f593 100644 --- a/drivers/gpu/drm/panfrost/panfrost_job.c +++ b/drivers/gpu/drm/panfrost/panfrost_job.c @@ -214,7 +214,11 @@ static int panfrost_job_hw_submit(struct panfrost_job *job, int js) goto err_hwsubmit; } - cfg = panfrost_mmu_as_get(pfdev, job->mmu); + ret = panfrost_mmu_as_get(pfdev, job->mmu); + if (ret < 0) + goto err_hwsubmit; + + cfg = (u32)ret; job_write(pfdev, JS_HEAD_NEXT_LO(js), lower_32_bits(jc_head)); job_write(pfdev, JS_HEAD_NEXT_HI(js), upper_32_bits(jc_head)); diff --git a/drivers/gpu/drm/panfrost/panfrost_mmu.c b/drivers/gpu/drm/panfrost/panfrost_mmu.c index 2189e42d2bfa..03ac527b35e7 100644 --- a/drivers/gpu/drm/panfrost/panfrost_mmu.c +++ b/drivers/gpu/drm/panfrost/panfrost_mmu.c @@ -155,7 +155,7 @@ static void panfrost_mmu_disable(struct panfrost_device *pfdev, u32 as_nr) write_cmd(pfdev, as_nr, AS_COMMAND_UPDATE); } -u32 panfrost_mmu_as_get(struct panfrost_device *pfdev, struct panfrost_mmu *mmu) +int panfrost_mmu_as_get(struct panfrost_device *pfdev, struct panfrost_mmu *mmu) { int as; @@ -197,7 +197,8 @@ u32 panfrost_mmu_as_get(struct panfrost_device *pfdev, struct panfrost_mmu *mmu) if (!atomic_read(&lru_mmu->as_count)) break; } - WARN_ON(&lru_mmu->list == &pfdev->as_lru_list); + if (WARN_ON(&lru_mmu->list == &pfdev->as_lru_list)) + return -EBUSY; list_del_init(&lru_mmu->list); as = lru_mmu->as; diff --git a/drivers/gpu/drm/panfrost/panfrost_mmu.h b/drivers/gpu/drm/panfrost/panfrost_mmu.h index 022a9a74a114..e6e6966a0cca 100644 --- a/drivers/gpu/drm/panfrost/panfrost_mmu.h +++ b/drivers/gpu/drm/panfrost/panfrost_mmu.h @@ -16,7 +16,7 @@ void panfrost_mmu_fini(struct panfrost_device *pfdev); void panfrost_mmu_reset(struct panfrost_device *pfdev); void panfrost_mmu_suspend_irq(struct panfrost_device *pfdev); -u32 panfrost_mmu_as_get(struct panfrost_device *pfdev, struct panfrost_mmu *mmu); +int panfrost_mmu_as_get(struct panfrost_device *pfdev, struct panfrost_mmu *mmu); void panfrost_mmu_as_put(struct panfrost_device *pfdev, struct panfrost_mmu *mmu); struct panfrost_mmu *panfrost_mmu_ctx_get(struct panfrost_mmu *mmu); diff --git a/drivers/gpu/drm/panfrost/panfrost_perfcnt.c b/drivers/gpu/drm/panfrost/panfrost_perfcnt.c index f30817bcf8ba..2145f9707dde 100644 --- a/drivers/gpu/drm/panfrost/panfrost_perfcnt.c +++ b/drivers/gpu/drm/panfrost/panfrost_perfcnt.c @@ -130,7 +130,12 @@ static int panfrost_perfcnt_enable_locked(struct panfrost_device *pfdev, perfcnt->user = user; - as = panfrost_mmu_as_get(pfdev, perfcnt->mapping->mmu); + ret = panfrost_mmu_as_get(pfdev, perfcnt->mapping->mmu); + if (ret) + goto err_unsetuser; + + as = (u32)ret; + cfg = GPU_PERFCNT_CFG_AS(as) | GPU_PERFCNT_CFG_MODE(GPU_PERFCNT_CFG_MODE_MANUAL); @@ -164,6 +169,8 @@ static int panfrost_perfcnt_enable_locked(struct panfrost_device *pfdev, return 0; +err_unsetuser: + perfcnt->user = NULL; err_vunmap: drm_gem_vunmap_unlocked(&bo->base, &map); err_put_mapping: