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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 20B1AC04E83 for ; Wed, 8 Jun 2022 02:03:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1442953AbiFHCBc (ORCPT ); Tue, 7 Jun 2022 22:01:32 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47436 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1840106AbiFHAEZ (ORCPT ); Tue, 7 Jun 2022 20:04:25 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5486026ACA4; Tue, 7 Jun 2022 12:22:16 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 724EEB823D4; Tue, 7 Jun 2022 19:22:03 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id DB1DCC385A2; Tue, 7 Jun 2022 19:22:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1654629722; bh=wJFVW/I+qZbsg4ltQvCNNL+rG+/iesshOHnsxPxAr4k=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=BVyWhbuxBFKU6YI3Q+VSW6Tuchd/pwbttXjhXsK+CVW2FxViGGptUo5BNYp2DC5/Q rrTVxIE+oHjWU/dF8qUVv3ZESAHnCkKswNR8Xgx80KSpSFf+OW/xrpHaFqptz1Hpjq 82TndWjmrhMFtbjQ0cpg9NsoirVmujxlhol4GjoM= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Lyude Paul , Karol Herbst Subject: [PATCH 5.18 792/879] drm/nouveau/subdev/bus: Ratelimit logging for fault errors Date: Tue, 7 Jun 2022 19:05:10 +0200 Message-Id: <20220607165025.851983840@linuxfoundation.org> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20220607165002.659942637@linuxfoundation.org> References: <20220607165002.659942637@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Lyude Paul commit 9887bda0c831df0c044d6de147d002e48024fb4a upstream. There's plenty of ways to fudge the GPU when developing on nouveau by mistake, some of which can result in nouveau seriously spamming dmesg with fault errors. This can be somewhat annoying, as it can quickly overrun the message buffer (or your terminal emulator's buffer) and get rid of actually useful feedback from the driver. While working on my new atomic only MST branch, I ran into this issue a couple of times. So, let's fix this by adding nvkm_error_ratelimited(), and using it to ratelimit errors from faults. This should be fine for developers, since it's nearly always only the first few faults that we care about seeing. Plus, you can turn off rate limiting in the kernel if you really need to. Signed-off-by: Lyude Paul Reviewed-by: Karol Herbst Cc: stable@vger.kernel.org Link: https://patchwork.freedesktop.org/patch/msgid/20220429195350.85620-1-lyude@redhat.com Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/nouveau/include/nvkm/core/subdev.h | 2 ++ drivers/gpu/drm/nouveau/nvkm/subdev/bus/gf100.c | 14 +++++++------- drivers/gpu/drm/nouveau/nvkm/subdev/bus/nv31.c | 6 +++--- drivers/gpu/drm/nouveau/nvkm/subdev/bus/nv50.c | 6 +++--- 4 files changed, 15 insertions(+), 13 deletions(-) --- a/drivers/gpu/drm/nouveau/include/nvkm/core/subdev.h +++ b/drivers/gpu/drm/nouveau/include/nvkm/core/subdev.h @@ -62,4 +62,6 @@ void nvkm_subdev_intr(struct nvkm_subdev #define nvkm_debug(s,f,a...) nvkm_printk((s), DEBUG, info, f, ##a) #define nvkm_trace(s,f,a...) nvkm_printk((s), TRACE, info, f, ##a) #define nvkm_spam(s,f,a...) nvkm_printk((s), SPAM, dbg, f, ##a) + +#define nvkm_error_ratelimited(s,f,a...) nvkm_printk((s), ERROR, err_ratelimited, f, ##a) #endif --- a/drivers/gpu/drm/nouveau/nvkm/subdev/bus/gf100.c +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/bus/gf100.c @@ -35,13 +35,13 @@ gf100_bus_intr(struct nvkm_bus *bus) u32 addr = nvkm_rd32(device, 0x009084); u32 data = nvkm_rd32(device, 0x009088); - nvkm_error(subdev, - "MMIO %s of %08x FAULT at %06x [ %s%s%s]\n", - (addr & 0x00000002) ? "write" : "read", data, - (addr & 0x00fffffc), - (stat & 0x00000002) ? "!ENGINE " : "", - (stat & 0x00000004) ? "PRIVRING " : "", - (stat & 0x00000008) ? "TIMEOUT " : ""); + nvkm_error_ratelimited(subdev, + "MMIO %s of %08x FAULT at %06x [ %s%s%s]\n", + (addr & 0x00000002) ? "write" : "read", data, + (addr & 0x00fffffc), + (stat & 0x00000002) ? "!ENGINE " : "", + (stat & 0x00000004) ? "PRIVRING " : "", + (stat & 0x00000008) ? "TIMEOUT " : ""); nvkm_wr32(device, 0x009084, 0x00000000); nvkm_wr32(device, 0x001100, (stat & 0x0000000e)); --- a/drivers/gpu/drm/nouveau/nvkm/subdev/bus/nv31.c +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/bus/nv31.c @@ -45,9 +45,9 @@ nv31_bus_intr(struct nvkm_bus *bus) u32 addr = nvkm_rd32(device, 0x009084); u32 data = nvkm_rd32(device, 0x009088); - nvkm_error(subdev, "MMIO %s of %08x FAULT at %06x\n", - (addr & 0x00000002) ? "write" : "read", data, - (addr & 0x00fffffc)); + nvkm_error_ratelimited(subdev, "MMIO %s of %08x FAULT at %06x\n", + (addr & 0x00000002) ? "write" : "read", data, + (addr & 0x00fffffc)); stat &= ~0x00000008; nvkm_wr32(device, 0x001100, 0x00000008); --- a/drivers/gpu/drm/nouveau/nvkm/subdev/bus/nv50.c +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/bus/nv50.c @@ -60,9 +60,9 @@ nv50_bus_intr(struct nvkm_bus *bus) u32 addr = nvkm_rd32(device, 0x009084); u32 data = nvkm_rd32(device, 0x009088); - nvkm_error(subdev, "MMIO %s of %08x FAULT at %06x\n", - (addr & 0x00000002) ? "write" : "read", data, - (addr & 0x00fffffc)); + nvkm_error_ratelimited(subdev, "MMIO %s of %08x FAULT at %06x\n", + (addr & 0x00000002) ? "write" : "read", data, + (addr & 0x00fffffc)); stat &= ~0x00000008; nvkm_wr32(device, 0x001100, 0x00000008);