From patchwork Thu Dec 1 17:43:51 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lucas Stach X-Patchwork-Id: 13061660 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 97A6FC43217 for ; Thu, 1 Dec 2022 17:44:01 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 0384610E65C; Thu, 1 Dec 2022 17:43:59 +0000 (UTC) Received: from metis.ext.pengutronix.de (metis.ext.pengutronix.de [IPv6:2001:67c:670:201:290:27ff:fe1d:cc33]) by gabe.freedesktop.org (Postfix) with ESMTPS id 225C810E658 for ; Thu, 1 Dec 2022 17:43:56 +0000 (UTC) Received: from dude02.red.stw.pengutronix.de ([2a0a:edc0:0:1101:1d::28]) by metis.ext.pengutronix.de with esmtp (Exim 4.92) (envelope-from ) id 1p0nbE-000057-TP; Thu, 01 Dec 2022 18:43:52 +0100 From: Lucas Stach To: etnaviv@lists.freedesktop.org Subject: [PATCH v2 2/2] drm/etnaviv: print MMU exception cause Date: Thu, 1 Dec 2022 18:43:51 +0100 Message-Id: <20221201174351.2731785-2-l.stach@pengutronix.de> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20221201174351.2731785-1-l.stach@pengutronix.de> References: <20221201174351.2731785-1-l.stach@pengutronix.de> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 2a0a:edc0:0:1101:1d::28 X-SA-Exim-Mail-From: l.stach@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: dri-devel@lists.freedesktop.org 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: patchwork-lst@pengutronix.de, kernel@pengutronix.de, dri-devel@lists.freedesktop.org, Russell King Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" From: Christian Gmeiner The MMU tells us the fault status. While the raw register value is already printed, it's a bit more user friendly to translate the fault reasons into human readable format. Signed-off-by: Christian Gmeiner Signed-off-by: Lucas Stach --- drivers/gpu/drm/etnaviv/etnaviv_gpu.c | 22 +++++++++++++++++++--- 1 file changed, 19 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c index 37018bc55810..f79203b774d9 100644 --- a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c +++ b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c @@ -1426,6 +1426,15 @@ static void sync_point_worker(struct work_struct *work) static void dump_mmu_fault(struct etnaviv_gpu *gpu) { + static const char *fault_reasons[] = { + "slave not present", + "page not present", + "write violation", + "out of bounds", + "read security violation", + "write security violation", + }; + u32 status_reg, status; int i; @@ -1438,18 +1447,25 @@ static void dump_mmu_fault(struct etnaviv_gpu *gpu) dev_err_ratelimited(gpu->dev, "MMU fault status 0x%08x\n", status); for (i = 0; i < 4; i++) { + const char *reason = "unknown"; u32 address_reg; + u32 mmu_status; - if (!(status & (VIVS_MMUv2_STATUS_EXCEPTION0__MASK << (i * 4)))) + mmu_status = (status >> (i * 4)) & VIVS_MMUv2_STATUS_EXCEPTION0__MASK; + if (!mmu_status) continue; + if ((mmu_status - 1) < ARRAY_SIZE(fault_reasons)) + reason = fault_reasons[mmu_status - 1]; + if (gpu->sec_mode == ETNA_SEC_NONE) address_reg = VIVS_MMUv2_EXCEPTION_ADDR(i); else address_reg = VIVS_MMUv2_SEC_EXCEPTION_ADDR; - dev_err_ratelimited(gpu->dev, "MMU %d fault addr 0x%08x\n", i, - gpu_read(gpu, address_reg)); + dev_err_ratelimited(gpu->dev, + "MMU %d fault (%s) addr 0x%08x\n", + i, reason, gpu_read(gpu, address_reg)); } }