From patchwork Mon Nov 9 22:23:19 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jordan Crouse X-Patchwork-Id: 11892659 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=-12.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 52D0FC55ABD for ; Mon, 9 Nov 2020 22:23:48 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id E56BE20789 for ; Mon, 9 Nov 2020 22:23:47 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=mg.codeaurora.org header.i=@mg.codeaurora.org header.b="Az+8jlye" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E56BE20789 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 40BE88967B; Mon, 9 Nov 2020 22:23:47 +0000 (UTC) Received: from z5.mailgun.us (z5.mailgun.us [104.130.96.5]) by gabe.freedesktop.org (Postfix) with ESMTPS id 561638967B for ; Mon, 9 Nov 2020 22:23:43 +0000 (UTC) DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1604960626; h=Content-Transfer-Encoding: MIME-Version: References: In-Reply-To: Message-Id: Date: Subject: Cc: To: From: Sender; bh=qs1k1EU5a8EBY3y9yGc57j0nwsNe37dA2tPuThXonxY=; b=Az+8jlyenwWChWVpY0/tueXQNvXiEOnFHrWOU8RNOKwpZbBWVUEqchxQUt/M9f4qs5eelB38 8zKUqu/wPSkal48J1cWve9Y69wdVto1Z3ODfHfMEt4nTvDgb7d63k0EbZhBvYUl2aP/gcACu dHcoRSEkivtmoxGp351XEMK6Q9o= X-Mailgun-Sending-Ip: 104.130.96.5 X-Mailgun-Sid: WyJkOTU5ZSIsICJkcmktZGV2ZWxAbGlzdHMuZnJlZWRlc2t0b3Aub3JnIiwgImJlOWU0YSJd Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by smtp-out-n01.prod.us-east-1.postgun.com with SMTP id 5fa9c169e41a481b55320281 (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Mon, 09 Nov 2020 22:23:37 GMT Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 0BE68C433B2; Mon, 9 Nov 2020 22:23:36 +0000 (UTC) Received: from jordan-laptop.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: jcrouse) by smtp.codeaurora.org (Postfix) with ESMTPSA id D15DDC433FE; Mon, 9 Nov 2020 22:23:31 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org D15DDC433FE Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=fail smtp.mailfrom=jcrouse@codeaurora.org From: Jordan Crouse To: linux-arm-msm@vger.kernel.org Subject: [RFC PATCH v1 3/3] drm/msm: Improve the a6xx page fault handler Date: Mon, 9 Nov 2020 15:23:19 -0700 Message-Id: <20201109222319.2630557-4-jcrouse@codeaurora.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20201109222319.2630557-1-jcrouse@codeaurora.org> References: <20201109222319.2630557-1-jcrouse@codeaurora.org> 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: , Cc: Sean Paul , Jonathan Marek , David Airlie , Robin Murphy , Sharat Masetty , "Gustavo A. R. Silva" , dri-devel@lists.freedesktop.org, Bjorn Andersson , Sam Ravnborg , iommu@lists.linux-foundation.org, freedreno@lists.freedesktop.org, Will Deacon , linux-kernel@vger.kernel.org, Emil Velikov Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Use the new adreno-smmu-priv fault info function to get more SMMU debug registers and print the current TTBR0 to debug per-instance pagetables and figure out which GPU block generated the request. Signed-off-by: Jordan Crouse --- drivers/gpu/drm/msm/adreno/a5xx_gpu.c | 4 +- drivers/gpu/drm/msm/adreno/a6xx_gpu.c | 76 +++++++++++++++++++++++++-- drivers/gpu/drm/msm/msm_iommu.c | 11 +++- drivers/gpu/drm/msm/msm_mmu.h | 4 +- 4 files changed, 87 insertions(+), 8 deletions(-) diff --git a/drivers/gpu/drm/msm/adreno/a5xx_gpu.c b/drivers/gpu/drm/msm/adreno/a5xx_gpu.c index d6804a802355..ed4cb81af874 100644 --- a/drivers/gpu/drm/msm/adreno/a5xx_gpu.c +++ b/drivers/gpu/drm/msm/adreno/a5xx_gpu.c @@ -933,7 +933,7 @@ bool a5xx_idle(struct msm_gpu *gpu, struct msm_ringbuffer *ring) return true; } -static int a5xx_fault_handler(void *arg, unsigned long iova, int flags) +static int a5xx_fault_handler(void *arg, unsigned long iova, int flags, void *data) { struct msm_gpu *gpu = arg; pr_warn_ratelimited("*** gpu fault: iova=%08lx, flags=%d (%u,%u,%u,%u)\n", @@ -943,7 +943,7 @@ static int a5xx_fault_handler(void *arg, unsigned long iova, int flags) gpu_read(gpu, REG_A5XX_CP_SCRATCH_REG(6)), gpu_read(gpu, REG_A5XX_CP_SCRATCH_REG(7))); - return -EFAULT; + return 0; } static void a5xx_cp_err_irq(struct msm_gpu *gpu) diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c index 948f3656c20c..ac6e8cd5cf1a 100644 --- a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c +++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c @@ -905,18 +905,88 @@ static void a6xx_recover(struct msm_gpu *gpu) msm_gpu_hw_init(gpu); } -static int a6xx_fault_handler(void *arg, unsigned long iova, int flags) +static const char *a6xx_uche_fault_block(struct msm_gpu *gpu, u32 mid) +{ + static const char *uche_clients[7] = { + "VFD", "SP", "VSC", "VPC", "HLSQ", "PC", "LRZ", + }; + u32 val; + + if (mid < 1 || mid > 3) + return "UNKNOWN"; + + /* + * The source of the data depends on the mid ID read from FSYNR1. + * and the client ID read from the UCHE block + */ + val = gpu_read(gpu, REG_A6XX_UCHE_CLIENT_PF); + + /* mid = 3 is most precise and refers to only one block per client */ + if (mid == 3) + return uche_clients[val & 7]; + + /* For mid=2 the source is TP or VFD except when the client id is 0 */ + if (mid == 2) + return ((val & 7) == 0) ? "TP" : "TP|VFD"; + + /* For mid=1 just return "UCHE" as a catchall for everything else */ + return "UCHE"; +} + +static const char *a6xx_fault_block(struct msm_gpu *gpu, u32 id) +{ + if (id == 0) + return "CP"; + else if (id == 4) + return "CCU"; + else if (id == 6) + return "CDP Prefetch"; + + return a6xx_uche_fault_block(gpu, id); +} + +#define ARM_SMMU_FSR_TF BIT(1) +#define ARM_SMMU_FSR_PF BIT(3) +#define ARM_SMMU_FSR_EF BIT(4) + +static int a6xx_fault_handler(void *arg, unsigned long iova, int flags, void *data) { struct msm_gpu *gpu = arg; + struct adreno_smmu_fault_info *info = data; + const char *type = "UNKNOWN"; - pr_warn_ratelimited("*** gpu fault: iova=%08lx, flags=%d (%u,%u,%u,%u)\n", + /* + * Print a default message if we couldn't get the data from the + * adreno-smmu-priv + */ + if (!info) { + pr_warn_ratelimited("*** gpu fault: iova=%.16lx flags=%d (%u,%u,%u,%u)\n", iova, flags, gpu_read(gpu, REG_A6XX_CP_SCRATCH_REG(4)), gpu_read(gpu, REG_A6XX_CP_SCRATCH_REG(5)), gpu_read(gpu, REG_A6XX_CP_SCRATCH_REG(6)), gpu_read(gpu, REG_A6XX_CP_SCRATCH_REG(7))); - return -EFAULT; + return 0; + } + + if (info->fsr & ARM_SMMU_FSR_TF) + type = "TRANSLATION"; + else if (info->fsr & ARM_SMMU_FSR_PF) + type = "PERMISSION"; + else if (info->fsr & ARM_SMMU_FSR_EF) + type = "EXTERNAL"; + + pr_warn_ratelimited("*** gpu fault: ttbr0=%.16llx iova=%.16lx dir=%s type=%s source=%s (%u,%u,%u,%u)\n", + info->ttbr0, iova, + flags & IOMMU_FAULT_WRITE ? "WRITE" : "READ", type, + a6xx_fault_block(gpu, info->fsynr1 & 0xff), + gpu_read(gpu, REG_A6XX_CP_SCRATCH_REG(4)), + gpu_read(gpu, REG_A6XX_CP_SCRATCH_REG(5)), + gpu_read(gpu, REG_A6XX_CP_SCRATCH_REG(6)), + gpu_read(gpu, REG_A6XX_CP_SCRATCH_REG(7))); + + return 0; } static void a6xx_cp_hw_err_irq(struct msm_gpu *gpu) diff --git a/drivers/gpu/drm/msm/msm_iommu.c b/drivers/gpu/drm/msm/msm_iommu.c index 22ac7c692a81..dc04575fc323 100644 --- a/drivers/gpu/drm/msm/msm_iommu.c +++ b/drivers/gpu/drm/msm/msm_iommu.c @@ -212,8 +212,17 @@ static int msm_fault_handler(struct iommu_domain *domain, struct device *dev, unsigned long iova, int flags, void *arg) { struct msm_iommu *iommu = arg; + struct adreno_smmu_priv *adreno_smmu = dev_get_drvdata(iommu->base.dev); + struct adreno_smmu_fault_info info, *ptr = NULL; + + if (adreno_smmu->cookie) { + adreno_smmu->get_fault_info(adreno_smmu->cookie, &info); + ptr = &info; + } + if (iommu->base.handler) - return iommu->base.handler(iommu->base.arg, iova, flags); + return iommu->base.handler(iommu->base.arg, iova, flags, ptr); + pr_warn_ratelimited("*** fault: iova=%16lx, flags=%d\n", iova, flags); return 0; } diff --git a/drivers/gpu/drm/msm/msm_mmu.h b/drivers/gpu/drm/msm/msm_mmu.h index 61ade89d9e48..a88f44c3268d 100644 --- a/drivers/gpu/drm/msm/msm_mmu.h +++ b/drivers/gpu/drm/msm/msm_mmu.h @@ -26,7 +26,7 @@ enum msm_mmu_type { struct msm_mmu { const struct msm_mmu_funcs *funcs; struct device *dev; - int (*handler)(void *arg, unsigned long iova, int flags); + int (*handler)(void *arg, unsigned long iova, int flags, void *data); void *arg; enum msm_mmu_type type; }; @@ -43,7 +43,7 @@ struct msm_mmu *msm_iommu_new(struct device *dev, struct iommu_domain *domain); struct msm_mmu *msm_gpummu_new(struct device *dev, struct msm_gpu *gpu); static inline void msm_mmu_set_fault_handler(struct msm_mmu *mmu, void *arg, - int (*handler)(void *arg, unsigned long iova, int flags)) + int (*handler)(void *arg, unsigned long iova, int flags, void *data)) { mmu->arg = arg; mmu->handler = handler;