From patchwork Wed Jun 21 00:57:17 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Andr=C3=A9_Almeida?= X-Patchwork-Id: 13286517 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 68ADBEB64DB for ; Wed, 21 Jun 2023 00:58:48 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 1A88310E392; Wed, 21 Jun 2023 00:58:41 +0000 (UTC) Received: from fanzine2.igalia.com (fanzine2.igalia.com [213.97.179.56]) by gabe.freedesktop.org (Postfix) with ESMTPS id 1CC1210E38F; Wed, 21 Jun 2023 00:58:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=igalia.com; s=20170329; h=Content-Transfer-Encoding:Content-Type:MIME-Version:References: In-Reply-To:Message-ID:Date:Subject:Cc:To:From:Sender:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=AHRpiiiLC5kKDXx9I68+5zUOknZnGRCucbKH1IwIdOA=; b=ZcBC5oLi2E/CWy/em1B12OApC7 20r32P8uA7Qb94hiFHgcfV9W3wrZXUErThEqCZNt17E90yEP19EmMhaXiQTM1wTzIpP16E2JWJxhX F7wpFdXLcBUmEmdVMkXjOQKUSJ10msQ5YFyu44DpJftADcB7dPF/n/qB4BGU5sEVCZqjMNDUlFu6W fP+bpoWCx6inN4SRmVjTmK4dinhO/EwDb6oGB58aHsnublzySd86iXLCWk7Bpyb6BWObbE0Zc/c2N FmpkOCwKYCHQ/hUr3obgd/q/0cCAOAD0tHeSwjcu5d2yhpAkwOA8OiwFrcDwGR4H3qTCpJnd+ReBH ZKz5J65A==; Received: from [179.113.218.86] (helo=steammachine.lan) by fanzine2.igalia.com with esmtpsa (Cipher TLS1.3:ECDHE_X25519__RSA_PSS_RSAE_SHA256__AES_256_GCM:256) (Exim) id 1qBmB8-0011pg-K6; Wed, 21 Jun 2023 02:58:35 +0200 From: =?utf-8?q?Andr=C3=A9_Almeida?= To: dri-devel@lists.freedesktop.org, amd-gfx@lists.freedesktop.org, linux-kernel@vger.kernel.org Subject: [RFC PATCH v3 2/4] drm: Create DRM_IOCTL_GET_RESET Date: Tue, 20 Jun 2023 21:57:17 -0300 Message-ID: <20230621005719.836857-3-andrealmeid@igalia.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230621005719.836857-1-andrealmeid@igalia.com> References: <20230621005719.836857-1-andrealmeid@igalia.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: , Cc: pierre-eric.pelloux-prayer@amd.com, =?utf-8?q?Andr=C3=A9_Almeida?= , =?utf-8?b?J01hcmVr?= =?utf-8?b?IE9sxaHDoWsn?= , =?utf-8?q?Michel_D=C3=A4nzer?= , =?utf-8?q?Timu?= =?utf-8?q?r_Krist=C3=B3f?= , Pekka Paalanen , Samuel Pitoiset , kernel-dev@igalia.com, alexander.deucher@amd.com, christian.koenig@amd.com Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Create a new DRM ioctl operation to get the numbers of resets for a given context. The numbers reflect just the resets that happened after the context was created, and not since the machine was booted. Create a debugfs interface to make easier to test the API without real resets. Signed-off-by: André Almeida --- drivers/gpu/drm/drm_debugfs.c | 2 ++ drivers/gpu/drm/drm_ioctl.c | 58 +++++++++++++++++++++++++++++++++++ include/drm/drm_device.h | 3 ++ include/drm/drm_drv.h | 3 ++ include/uapi/drm/drm.h | 21 +++++++++++++ include/uapi/drm/drm_mode.h | 15 +++++++++ 6 files changed, 102 insertions(+) diff --git a/drivers/gpu/drm/drm_debugfs.c b/drivers/gpu/drm/drm_debugfs.c index 4855230ba2c6..316dce60434d 100644 --- a/drivers/gpu/drm/drm_debugfs.c +++ b/drivers/gpu/drm/drm_debugfs.c @@ -251,6 +251,8 @@ int drm_debugfs_init(struct drm_minor *minor, int minor_id, list_del(&entry->list); } + debugfs_create_bool("drm_reset_spoof", 0644, minor->debugfs_root, &dev->reset_spoof); + return 0; } diff --git a/drivers/gpu/drm/drm_ioctl.c b/drivers/gpu/drm/drm_ioctl.c index 7c9d66ee917d..23c282681ec7 100644 --- a/drivers/gpu/drm/drm_ioctl.c +++ b/drivers/gpu/drm/drm_ioctl.c @@ -528,6 +528,63 @@ int drm_version(struct drm_device *dev, void *data, return err; } +/** + * drm_spoof_reset - Spoof a fake reset + * + * @reset: reset struct to be spoofed + * + * Create a fake reset report for testing + */ +static void drm_spoof_reset(struct drm_get_reset *reset) +{ + reset->dev_reset_count = 1; + reset->ctx_reset_count = 0; + reset->flags = 0; + reset->ctx_id = 0; + + DRM_INFO("[Spoofed] Reporting reset.ctx = %llu .dev = %llu\n", + reset->ctx_reset_count, reset->dev_reset_count); +} + +/** + * drm_getreset - Get reset information from a DRM device + * + * @dev DRM device + * @data user argument, pointing to a drm_get_reset structure + * @filp file pointer + * + * Return zero on success or negative number on failure. + * + * Fills in the reset information in data arg. + */ +int drm_getreset(struct drm_device *dev, void *data, + struct drm_file *file_priv) +{ + struct drm_get_reset *reset = data; + int ret = 0; + + if (dev->reset_spoof) { + drm_spoof_reset(reset); + return 0; + } + + if (!dev->driver->get_reset) + return -ENOSYS; + + if (reset->flags) + return -EINVAL; + + ret = dev->driver->get_reset(file_priv, dev, reset); + + if (!ret) + DRM_INFO("Reporting reset.ctx = %llu .dev = %llu\n", + reset->ctx_reset_count, reset->dev_reset_count); + else + DRM_WARN("%s failed with %d return\n", __func__, ret); + + return ret; +} + static int drm_ioctl_permit(u32 flags, struct drm_file *file_priv) { /* ROOT_ONLY is only for CAP_SYS_ADMIN */ @@ -716,6 +773,7 @@ static const struct drm_ioctl_desc drm_ioctls[] = { DRM_IOCTL_DEF(DRM_IOCTL_MODE_LIST_LESSEES, drm_mode_list_lessees_ioctl, DRM_MASTER), DRM_IOCTL_DEF(DRM_IOCTL_MODE_GET_LEASE, drm_mode_get_lease_ioctl, DRM_MASTER), DRM_IOCTL_DEF(DRM_IOCTL_MODE_REVOKE_LEASE, drm_mode_revoke_lease_ioctl, DRM_MASTER), + DRM_IOCTL_DEF(DRM_IOCTL_GET_RESET, drm_getreset, DRM_RENDER_ALLOW), }; #define DRM_CORE_IOCTL_COUNT ARRAY_SIZE(drm_ioctls) diff --git a/include/drm/drm_device.h b/include/drm/drm_device.h index 7cf4afae2e79..fcd7b5d45cde 100644 --- a/include/drm/drm_device.h +++ b/include/drm/drm_device.h @@ -326,6 +326,9 @@ struct drm_device { */ struct list_head debugfs_list; + /* Spoof device reset for testing */ + bool reset_spoof; + /* Everything below here is for legacy driver, never use! */ /* private: */ #if IS_ENABLED(CONFIG_DRM_LEGACY) diff --git a/include/drm/drm_drv.h b/include/drm/drm_drv.h index 89e2706cac56..518a9db157fb 100644 --- a/include/drm/drm_drv.h +++ b/include/drm/drm_drv.h @@ -401,6 +401,9 @@ struct drm_driver { struct drm_device *dev, uint32_t handle, uint64_t *offset); + int (*get_reset)(struct drm_file *file_priv, + struct drm_device *dev, struct drm_get_reset *reset); + /** * @show_fdinfo: * diff --git a/include/uapi/drm/drm.h b/include/uapi/drm/drm.h index a87bbbbca2d4..a84559aa0d77 100644 --- a/include/uapi/drm/drm.h +++ b/include/uapi/drm/drm.h @@ -1169,6 +1169,27 @@ extern "C" { */ #define DRM_IOCTL_MODE_GETFB2 DRM_IOWR(0xCE, struct drm_mode_fb_cmd2) +/** + * DRM_IOCTL_GET_RESET - Get information about device resets + * + * This operation requests from the device information about resets. It should + * consider only resets that happens after the context is created, therefore, + * the counter should be zero during context creation. + * + * dev_reset_count tells how many resets have happened on this device, and + * ctx_reset_count tells how many of such resets were caused by this context. + * + * Flags can be used to tell if a reset is in progress, and userspace should + * wait until it's not in progress anymore to be able to create a new context; + * and to tell if the VRAM is considered lost. There's no safe way to clean this + * flag so if a context see this flag set, it should be like that until the end + * of the context. + */ +#define DRM_IOCTL_GET_RESET DRM_IOWR(0xCF, struct drm_get_reset) + +#define DRM_RESET_IN_PROGRESS 0x1 +#define DRM_RESET_VRAM_LOST 0x2 + /* * Device specific ioctls should only be in their respective headers * The device specific ioctl range is from 0x40 to 0x9f. diff --git a/include/uapi/drm/drm_mode.h b/include/uapi/drm/drm_mode.h index 43691058d28f..c3257bd1af9c 100644 --- a/include/uapi/drm/drm_mode.h +++ b/include/uapi/drm/drm_mode.h @@ -1308,6 +1308,21 @@ struct drm_mode_rect { __s32 y2; }; +/** + * struct drm_get_reset - Get information about a DRM device resets + * @ctx_id: the context id to be queried about resets + * @flags: flags + * @dev_reset_count: global counter of resets for a given DRM device + * @ctx_reset_count: of all the resets counted by this device, how many were + * caused by this context. + */ +struct drm_get_reset { + __u32 ctx_id; + __u32 flags; + __u64 dev_reset_count; + __u64 ctx_reset_count; +}; + #if defined(__cplusplus) } #endif