From patchwork Thu Apr 24 02:21:32 2025 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: 884129 Received: from sender4-pp-f112.zoho.com (sender4-pp-f112.zoho.com [136.143.188.112]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7E45E17A2FF; Thu, 24 Apr 2025 02:22:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=pass smtp.client-ip=136.143.188.112 ARC-Seal: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745461346; cv=pass; b=JaWIzLdDcUfHQAuVKB2k3vAIHkBHZaIK7bWVlEIjVphW86Uiy6tfmhNsa06LC9aP/IB6XRBucF7vtqs+mAvjY7b/Se2SiIFl9DaS++C2PHHDqf3kxRrzz31bGiRzRblN/Npf0ovsH+djneKtlRh3DELcc0pHr/8fiRWGJFWBrfI= ARC-Message-Signature: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745461346; c=relaxed/simple; bh=VDcA+A2edSs3KTLZurQcKphMM0xzOlIsR1s3yQHWimY=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=H7or7ofdfJIC8xd8udzuaGFP9CPRC1FBIM2MkAbZz4i0d00925xLlfgjCjbIZSBijN6yyA+yV76mSmWAl7+kuxgYrlOAdsuO4u8CZFCR/lbCMeudpoTBBrTa0opWUzSSm50hnpK3592pmJtPGS5PeeMON+2JojH/r5lKi0lIO/8= ARC-Authentication-Results: i=2; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=collabora.com; spf=pass smtp.mailfrom=collabora.com; dkim=pass (1024-bit key) header.d=collabora.com header.i=adrian.larumbe@collabora.com header.b=Wm2R2PUm; arc=pass smtp.client-ip=136.143.188.112 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=collabora.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=collabora.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=collabora.com header.i=adrian.larumbe@collabora.com header.b="Wm2R2PUm" ARC-Seal: i=1; a=rsa-sha256; t=1745461321; cv=none; d=zohomail.com; s=zohoarc; b=EbsNCH3cKFxrSfecvmPM+wQp8kiq1RmwELXqLYKdWcanhB5sGaWb8elSCWck7DeIhHWtAL0cd2QaAafQOkyccsjRX6nyof4CwXDfAxYtbsrBWp1JCm9y2mu5BGnGyGkyjYLo9No+MgXHY3W8TuVDxhlbxen82XqfVHxS1yAAzG8= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1745461321; 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=4610HNpAr8lhhyh/YAuy/GQk/fTN2NlOR5POOrLX4So=; b=Tx2rsTSwr1tioYls2Xg1UpHU6gfQgMX2Y4C/oBoXJNEEDP/eHy1EdOw6XrBb8kiJcqybIIG8X8/377cuROP5GFcAEatIA+NGEZsFVLzQNUFA3yYl9jIZIuk1ZW2QoXCs28m4/2KkuJn+nkshgwdB26THWyIRK+k8U6S7CBDUjXk= 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=1745461321; 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=4610HNpAr8lhhyh/YAuy/GQk/fTN2NlOR5POOrLX4So=; b=Wm2R2PUm1TIF5aZxs/4yPB1DADgaVyfvt8jW2Ur8QfA0Ytlhhv+wMPGTrxzVFqty b5bZrUUpm/He54oF14s0cIa4gbD+WTU9TcUBBR7VK5wkTUnLvPU6u2OO2XDaHrLPJsK fs2KlIJoFihxfxeJZfCl79vHIb+kA3HbwU8eZ6Go= Received: by mx.zohomail.com with SMTPS id 1745461320158285.2215441334389; Wed, 23 Apr 2025 19:22:00 -0700 (PDT) From: =?utf-8?q?Adri=C3=A1n_Larumbe?= To: linux-kernel@vger.kernel.org Cc: dri-devel@lists.freedesktop.org, Boris Brezillon , kernel@collabora.com, =?utf-8?q?Adri=C3=A1n_Larumbe?= , Rob Herring , Steven Price , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Sumit Semwal , =?utf-8?q?Christian_K=C3=B6nig?= , linux-media@vger.kernel.org, linaro-mm-sig@lists.linaro.org Subject: [PATCH 3/3] drm/panfrost: show device-wide list of DRM GEM objects over DebugFS Date: Thu, 24 Apr 2025 03:21:32 +0100 Message-ID: <20250424022138.709303-4-adrian.larumbe@collabora.com> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250424022138.709303-1-adrian.larumbe@collabora.com> References: <20250424022138.709303-1-adrian.larumbe@collabora.com> Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 This change is essentially a Panfrost port of commit a3707f53eb3f ("drm/panthor: show device-wide list of DRM GEM objects over DebugFS"). The DebugFS file is almost the same as in Panthor, minus the GEM object usage flags, since Panfrost has no kernel-only BO's. Two additional GEM state flags which are displayed but aren't relevant to Panthor are 'Purged' and 'Purgeable', since Panfrost implements an explicit shrinker and a madvise ioctl to flag objects as reclaimable. Signed-off-by: Adrián Larumbe --- drivers/gpu/drm/panfrost/panfrost_device.c | 4 + drivers/gpu/drm/panfrost/panfrost_device.h | 11 ++ drivers/gpu/drm/panfrost/panfrost_drv.c | 37 ++++++ drivers/gpu/drm/panfrost/panfrost_gem.c | 137 +++++++++++++++++++++ drivers/gpu/drm/panfrost/panfrost_gem.h | 58 +++++++++ 5 files changed, 247 insertions(+) diff --git a/drivers/gpu/drm/panfrost/panfrost_device.c b/drivers/gpu/drm/panfrost/panfrost_device.c index a45e4addcc19..7ba140aaf59d 100644 --- a/drivers/gpu/drm/panfrost/panfrost_device.c +++ b/drivers/gpu/drm/panfrost/panfrost_device.c @@ -209,6 +209,10 @@ int panfrost_device_init(struct panfrost_device *pfdev) spin_lock_init(&pfdev->cycle_counter.lock); +#ifdef CONFIG_DEBUG_FS + mutex_init(&pfdev->gems.lock); + INIT_LIST_HEAD(&pfdev->gems.node); +#endif err = panfrost_clk_init(pfdev); if (err) { dev_err(pfdev->dev, "clk init failed %d\n", err); diff --git a/drivers/gpu/drm/panfrost/panfrost_device.h b/drivers/gpu/drm/panfrost/panfrost_device.h index ad95f2ed31d9..395272a79306 100644 --- a/drivers/gpu/drm/panfrost/panfrost_device.h +++ b/drivers/gpu/drm/panfrost/panfrost_device.h @@ -161,6 +161,17 @@ struct panfrost_device { atomic_t use_count; spinlock_t lock; } cycle_counter; + + #ifdef CONFIG_DEBUG_FS + /** @gems: Device-wide list of GEM objects owned by at least one file. */ + struct { + /** @gems.lock: Protects the device-wide list of GEM objects. */ + struct mutex lock; + + /** @node: Used to keep track of all the device's DRM objects */ + struct list_head node; + } gems; +#endif }; struct panfrost_mmu { diff --git a/drivers/gpu/drm/panfrost/panfrost_drv.c b/drivers/gpu/drm/panfrost/panfrost_drv.c index b0ab76d67e96..12dd9f311984 100644 --- a/drivers/gpu/drm/panfrost/panfrost_drv.c +++ b/drivers/gpu/drm/panfrost/panfrost_drv.c @@ -13,6 +13,7 @@ #include #include #include +#include #include #include #include @@ -153,6 +154,8 @@ static int panfrost_ioctl_create_bo(struct drm_device *dev, void *data, ret = -EINVAL; } + panfrost_gem_debugfs_init_bo(bo); + out: drm_gem_object_put(&bo->base.base); return ret; @@ -659,6 +662,37 @@ static const struct file_operations panfrost_drm_driver_fops = { .show_fdinfo = drm_show_fdinfo, }; +#ifdef CONFIG_DEBUG_FS +static int panthor_gems_show(struct seq_file *m, void *data) +{ + struct drm_info_node *node = m->private; + struct drm_device *dev = node->minor->dev; + struct panfrost_device *pfdev = dev->dev_private; + + panfrost_gem_debugfs_print_bos(pfdev, m); + + return 0; +} + +static struct drm_info_list panthor_debugfs_list[] = { + {"gems", panthor_gems_show, 0, NULL}, +}; + +static int panthor_gems_debugfs_init(struct drm_minor *minor) +{ + drm_debugfs_create_files(panthor_debugfs_list, + ARRAY_SIZE(panthor_debugfs_list), + minor->debugfs_root, minor); + + return 0; +} + +static void panfrost_debugfs_init(struct drm_minor *minor) +{ + panthor_gems_debugfs_init(minor); +} +#endif + /* * Panfrost driver version: * - 1.0 - initial interface @@ -683,6 +717,9 @@ static const struct drm_driver panfrost_drm_driver = { .gem_create_object = panfrost_gem_create_object, .gem_prime_import_sg_table = panfrost_gem_prime_import_sg_table, +#ifdef CONFIG_DEBUG_FS + .debugfs_init = panfrost_debugfs_init, +#endif }; static int panfrost_probe(struct platform_device *pdev) diff --git a/drivers/gpu/drm/panfrost/panfrost_gem.c b/drivers/gpu/drm/panfrost/panfrost_gem.c index a7a29974d8b1..8a0fd1abd05c 100644 --- a/drivers/gpu/drm/panfrost/panfrost_gem.c +++ b/drivers/gpu/drm/panfrost/panfrost_gem.c @@ -12,6 +12,38 @@ #include "panfrost_gem.h" #include "panfrost_mmu.h" +#ifdef CONFIG_DEBUG_FS +static void panfrost_gem_debugfs_bo_add(struct panfrost_device *ptdev, + struct panfrost_gem_object *bo) +{ + INIT_LIST_HEAD(&bo->debugfs.node); + + bo->debugfs.creator.tgid = current->group_leader->pid; + get_task_comm(bo->debugfs.creator.process_name, current->group_leader); + + mutex_lock(&ptdev->gems.lock); + list_add_tail(&bo->debugfs.node, &ptdev->gems.node); + mutex_unlock(&ptdev->gems.lock); +} + +static void panfrost_gem_debugfs_bo_rm(struct panfrost_gem_object *bo) +{ + struct panfrost_device *ptdev = bo->base.base.dev->dev_private; + + if (list_empty(&bo->debugfs.node)) + return; + + mutex_lock(&ptdev->gems.lock); + list_del_init(&bo->debugfs.node); + mutex_unlock(&ptdev->gems.lock); +} +#else +static void panfrost_gem_debugfs_bo_add(struct panfrost_device *ptdev, + struct panfrost_gem_object *bo) +{} +static void panfrost_gem_debugfs_bo_rm(struct panfrost_gem_object *bo) {} +#endif + /* Called DRM core on the last userspace/kernel unreference of the * BO. */ @@ -36,6 +68,7 @@ static void panfrost_gem_free_object(struct drm_gem_object *obj) */ WARN_ON_ONCE(!list_empty(&bo->mappings.list)); + panfrost_gem_debugfs_bo_rm(bo); kfree(bo->label.str); mutex_destroy(&bo->label.lock); @@ -266,6 +299,8 @@ struct drm_gem_object *panfrost_gem_create_object(struct drm_device *dev, size_t obj->base.map_wc = !pfdev->coherent; mutex_init(&obj->label.lock); + panfrost_gem_debugfs_bo_add(pfdev, obj); + return &obj->base.base; } @@ -321,3 +356,105 @@ panfrost_gem_set_label(struct drm_gem_object *obj, const char *label) kfree(old_label); } + +#ifdef CONFIG_DEBUG_FS +struct gem_size_totals { + size_t size; + size_t resident; + size_t reclaimable; +}; + +struct flag_def { + u32 flag; + const char *name; +}; + +static void panfrost_gem_debugfs_print_flag_names(struct seq_file *m) +{ + int len; + int i; + + static const struct flag_def gem_state_flags_names[] = { + {PANFROST_DEBUGFS_GEM_STATE_FLAG_IMPORTED, "imported"}, + {PANFROST_DEBUGFS_GEM_STATE_FLAG_EXPORTED, "exported"}, + {PANFROST_DEBUGFS_GEM_STATE_FLAG_PURGED, "purged"}, + {PANFROST_DEBUGFS_GEM_STATE_FLAG_PURGEABLE, "purgeable"}, + }; + + seq_puts(m, "GEM state flags: "); + for (i = 0, len = ARRAY_SIZE(gem_state_flags_names); i < len; i++) { + seq_printf(m, "%s (0x%x)%s", gem_state_flags_names[i].name, + gem_state_flags_names[i].flag, (i < len - 1) ? ", " : "\n\n"); + } +} + +static void panfrost_gem_debugfs_bo_print(struct panfrost_gem_object *bo, + struct seq_file *m, + struct gem_size_totals *totals) +{ + unsigned int refcount = kref_read(&bo->base.base.refcount); + char creator_info[32] = {}; + size_t resident_size; + u32 gem_state_flags = 0; + + /* Skip BOs being destroyed. */ + if (!refcount) + return; + + resident_size = bo->base.pages ? bo->base.base.size : 0; + + snprintf(creator_info, sizeof(creator_info), + "%s/%d", bo->debugfs.creator.process_name, bo->debugfs.creator.tgid); + seq_printf(m, "%-32s%-16d%-16d%-16zd%-16zd0x%-16lx", + creator_info, + bo->base.base.name, + refcount, + bo->base.base.size, + resident_size, + drm_vma_node_start(&bo->base.base.vma_node)); + + if (bo->base.base.import_attach) + gem_state_flags |= PANFROST_DEBUGFS_GEM_STATE_FLAG_IMPORTED; + if (bo->base.base.dma_buf) + gem_state_flags |= PANFROST_DEBUGFS_GEM_STATE_FLAG_EXPORTED; + + if (bo->base.madv < 0) + gem_state_flags |= PANFROST_DEBUGFS_GEM_STATE_FLAG_PURGED; + else if (bo->base.madv > 0) + gem_state_flags |= PANFROST_DEBUGFS_GEM_STATE_FLAG_PURGEABLE; + + seq_printf(m, "0x%-10x", gem_state_flags); + + scoped_guard(mutex, &bo->label.lock) { + seq_printf(m, "%s\n", bo->label.str ? : ""); + } + + totals->size += bo->base.base.size; + totals->resident += resident_size; + if (bo->base.madv > 0) + totals->reclaimable += resident_size; +} + +void panfrost_gem_debugfs_print_bos(struct panfrost_device *ptdev, + struct seq_file *m) +{ + struct gem_size_totals totals = {0}; + struct panfrost_gem_object *bo; + + panfrost_gem_debugfs_print_flag_names(m); + + seq_puts(m, "created-by global-name refcount size resident-size file-offset state label\n"); + seq_puts(m, "-----------------------------------------------------------------------------------------------------------------------------------\n"); + + scoped_guard(mutex, &ptdev->gems.lock) { + list_for_each_entry(bo, &ptdev->gems.node, debugfs.node) { + if (bo->debugfs.initialised) + panfrost_gem_debugfs_bo_print(bo, m, &totals); + } + } + + seq_puts(m, "===================================================================================================================================\n"); + seq_printf(m, "Total size: %zd, Total resident: %zd, Total reclaimable: %zd\n", + totals.size, totals.resident, totals.reclaimable); +} +#endif diff --git a/drivers/gpu/drm/panfrost/panfrost_gem.h b/drivers/gpu/drm/panfrost/panfrost_gem.h index 842e025b9bdc..bc60e0d74da9 100644 --- a/drivers/gpu/drm/panfrost/panfrost_gem.h +++ b/drivers/gpu/drm/panfrost/panfrost_gem.h @@ -8,9 +8,50 @@ #include struct panfrost_mmu; +struct panfrost_device; #define PANFROST_BO_LABEL_MAXLEN 4096 +enum panfrost_debugfs_gem_state_flags { + /** @PANFROST_DEBUGFS_GEM_STATE_FLAG_IMPORTED: GEM BO is PRIME imported. */ + PANFROST_DEBUGFS_GEM_STATE_FLAG_IMPORTED = BIT(0), + + /** @PANFROST_DEBUGFS_GEM_STATE_FLAG_EXPORTED: GEM BO is PRIME exported. */ + PANFROST_DEBUGFS_GEM_STATE_FLAG_EXPORTED = BIT(1), + + /** @PANFROST_DEBUGFS_GEM_STATE_FLAG_PURGED: GEM BO was reclaimed by the shrinker. */ + PANFROST_DEBUGFS_GEM_STATE_FLAG_PURGED = BIT(2), + + /** + * @PANFROST_DEBUGFS_GEM_STATE_FLAG_PURGEABLE: GEM BO pages were marked as no longer + * needed by UM and can be reclaimed by the shrinker. + */ + PANFROST_DEBUGFS_GEM_STATE_FLAG_PURGEABLE = BIT(3), +}; + +/** + * struct panfrost_gem_debugfs - GEM object's DebugFS list information + */ +struct panfrost_gem_debugfs { + /** + * @node: Node used to insert the object in the device-wide list of + * GEM objects, to display information about it through a DebugFS file. + */ + struct list_head node; + + /** @creator: Information about the UM process which created the GEM. */ + struct { + /** @creator.process_name: Group leader name in owning thread's process */ + char process_name[TASK_COMM_LEN]; + + /** @creator.tgid: PID of the thread's group leader within its process */ + pid_t tgid; + } creator; + + /** @initialised: GEM object is ready to be displayed in DebugFS file. */ + bool initialised; +}; + struct panfrost_gem_object { struct drm_gem_shmem_object base; struct sg_table *sgts; @@ -59,6 +100,10 @@ struct panfrost_gem_object { bool noexec :1; bool is_heap :1; + +#ifdef CONFIG_DEBUG_FS + struct panfrost_gem_debugfs debugfs; +#endif }; struct panfrost_gem_mapping { @@ -107,4 +152,17 @@ void panfrost_gem_shrinker_cleanup(struct drm_device *dev); void panfrost_gem_set_label(struct drm_gem_object *obj, const char *label); +#ifdef CONFIG_DEBUG_FS +void panfrost_gem_debugfs_print_bos(struct panfrost_device *pfdev, + struct seq_file *m); +static inline void +panfrost_gem_debugfs_init_bo(struct panfrost_gem_object *bo) +{ + bo->debugfs.initialised = true; +} +#else +static inline void +panfrost_gem_debugfs_init_bo(struct panfrost_gem_object *bo) {}; +#endif + #endif /* __PANFROST_GEM_H__ */