From patchwork Thu Jul 11 09:46:38 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lionel Landwerlin X-Patchwork-Id: 11039535 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 96108138B for ; Thu, 11 Jul 2019 09:46:59 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 8362C287DA for ; Thu, 11 Jul 2019 09:46:59 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 77E5D2882F; Thu, 11 Jul 2019 09:46:59 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id ACEAE287DA for ; Thu, 11 Jul 2019 09:46:58 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 3D1D96E17F; Thu, 11 Jul 2019 09:46:57 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by gabe.freedesktop.org (Postfix) with ESMTPS id 70F206E17B for ; Thu, 11 Jul 2019 09:46:53 +0000 (UTC) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga103.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 11 Jul 2019 02:46:53 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.63,478,1557212400"; d="scan'208";a="193346437" Received: from amahmed2-mobl1.ger.corp.intel.com (HELO delly.ger.corp.intel.com) ([10.252.49.213]) by fmsmga002.fm.intel.com with ESMTP; 11 Jul 2019 02:46:52 -0700 From: Lionel Landwerlin To: intel-gfx@lists.freedesktop.org Date: Thu, 11 Jul 2019 12:46:38 +0300 Message-Id: <20190711094638.8022-10-lionel.g.landwerlin@intel.com> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20190711094638.8022-1-lionel.g.landwerlin@intel.com> References: <20190711094638.8022-1-lionel.g.landwerlin@intel.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH v9 9/9] drm/i915: add support for perf configuration queries X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" X-Virus-Scanned: ClamAV using ClamSMTP Listing configurations at the moment is supported only through sysfs. This might cause issues for applications wanting to list configurations from a container where sysfs isn't available. This change adds a way to query the number of configurations and their content through the i915 query uAPI. v2: Fix sparse warnings (Lionel) Add support to query configuration using uuid (Lionel) v3: Fix some inconsistency in uapi header (Lionel) Fix unlocking when not locked issue (Lionel) Add debug messages (Lionel) v4: Fix missing unlock (Dan) v5: Drop lock when copying config content to userspace (Chris) v6: Drop lock when copying config list to userspace (Chris) Fix deadlock when calling i915_perf_get_oa_config() under perf.metrics_lock (Lionel) Add i915_oa_config_get() (Chris) Signed-off-by: Lionel Landwerlin Reviewed-by: Chris Wilson --- drivers/gpu/drm/i915/i915_drv.h | 12 ++ drivers/gpu/drm/i915/i915_perf.c | 3 + drivers/gpu/drm/i915/i915_query.c | 282 ++++++++++++++++++++++++++++++ include/uapi/drm/i915_drm.h | 65 ++++++- 4 files changed, 359 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index c72e7c746b57..b079664ce02b 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -1729,6 +1729,12 @@ struct drm_i915_private { */ struct list_head metrics_buffers; + /* + * Number of dynamic configurations, you need to hold + * dev_priv->perf.metrics_lock to access it. + */ + u32 n_metrics; + /* * Lock associated with anything below within this structure * except exclusive_stream. @@ -2631,6 +2637,12 @@ int i915_perf_get_oa_config(struct drm_i915_private *i915, struct drm_i915_gem_object **out_obj); void i915_oa_config_release(struct kref *ref); +static inline struct i915_oa_config *i915_oa_config_get(struct i915_oa_config *oa_config) +{ + kref_get(&oa_config->ref); + return oa_config; +} + static inline void i915_oa_config_put(struct i915_oa_config *oa_config) { kref_put(&oa_config->ref, i915_oa_config_release); diff --git a/drivers/gpu/drm/i915/i915_perf.c b/drivers/gpu/drm/i915/i915_perf.c index d291529b92f7..ee47da180f56 100644 --- a/drivers/gpu/drm/i915/i915_perf.c +++ b/drivers/gpu/drm/i915/i915_perf.c @@ -3719,6 +3719,8 @@ int i915_perf_add_config_ioctl(struct drm_device *dev, void *data, goto sysfs_err; } + dev_priv->perf.n_metrics++; + mutex_unlock(&dev_priv->perf.metrics_lock); DRM_DEBUG("Added config %s id=%i\n", oa_config->uuid, oa_config->id); @@ -3779,6 +3781,7 @@ int i915_perf_remove_config_ioctl(struct drm_device *dev, void *data, &oa_config->sysfs_metric); idr_remove(&dev_priv->perf.metrics_idr, *arg); + dev_priv->perf.n_metrics--; mutex_unlock(&dev_priv->perf.metrics_lock); diff --git a/drivers/gpu/drm/i915/i915_query.c b/drivers/gpu/drm/i915/i915_query.c index 7b7016171057..4de79d534a62 100644 --- a/drivers/gpu/drm/i915/i915_query.c +++ b/drivers/gpu/drm/i915/i915_query.c @@ -143,10 +143,292 @@ query_engine_info(struct drm_i915_private *i915, return len; } +static int can_copy_perf_config_registers_or_number(u32 user_n_regs, + u64 user_regs_ptr, + u32 kernel_n_regs) +{ + /* + * We'll just put the number of registers, and won't copy the + * register. + */ + if (user_n_regs == 0) + return 0; + + if (user_n_regs < kernel_n_regs) + return -EINVAL; + + if (!access_ok(u64_to_user_ptr(user_regs_ptr), + 2 * sizeof(u32) * kernel_n_regs)) + return -EFAULT; + + return 0; +} + +static int copy_perf_config_registers_or_number(const struct i915_oa_reg *kernel_regs, + u32 kernel_n_regs, + u64 user_regs_ptr, + u32 *user_n_regs) +{ + u32 r; + + if (*user_n_regs == 0) { + *user_n_regs = kernel_n_regs; + return 0; + } + + *user_n_regs = kernel_n_regs; + + for (r = 0; r < kernel_n_regs; r++) { + u32 __user *user_reg_ptr = + u64_to_user_ptr(user_regs_ptr + sizeof(u32) * r * 2); + u32 __user *user_val_ptr = + u64_to_user_ptr(user_regs_ptr + sizeof(u32) * r * 2 + + sizeof(u32)); + int ret; + + ret = __put_user(i915_mmio_reg_offset(kernel_regs[r].addr), + user_reg_ptr); + if (ret) + return -EFAULT; + + ret = __put_user(kernel_regs[r].value, user_val_ptr); + if (ret) + return -EFAULT; + } + + return 0; +} + +static int query_perf_config_data(struct drm_i915_private *i915, + struct drm_i915_query_item *query_item, + bool use_uuid) +{ + struct drm_i915_query_perf_config __user *user_query_config_ptr = + u64_to_user_ptr(query_item->data_ptr); + struct drm_i915_perf_oa_config __user *user_config_ptr = + u64_to_user_ptr(query_item->data_ptr + + sizeof(struct drm_i915_query_perf_config)); + struct drm_i915_perf_oa_config user_config; + struct i915_oa_config *oa_config = NULL; + char uuid[UUID_STRING_LEN + 1]; + u64 config_id; + u32 flags, total_size; + int ret; + + if (!i915->perf.initialized) + return -ENODEV; + + total_size = sizeof(struct drm_i915_query_perf_config) + + sizeof(struct drm_i915_perf_oa_config); + + if (query_item->length == 0) + return total_size; + + if (query_item->length < total_size) { + DRM_DEBUG("Invalid query config data item size=%u expected=%u\n", + query_item->length, total_size); + return -EINVAL; + } + + if (!access_ok(user_query_config_ptr, total_size)) + return -EFAULT; + + if (__get_user(flags, &user_query_config_ptr->flags)) + return -EFAULT; + + if (flags != 0) + return -EINVAL; + + if (use_uuid) { + BUILD_BUG_ON(sizeof(user_query_config_ptr->uuid) >= sizeof(uuid)); + + memset(&uuid, 0, sizeof(uuid)); + if (__copy_from_user(uuid, user_query_config_ptr->uuid, + sizeof(user_query_config_ptr->uuid))) + return -EFAULT; + } else { + if (__get_user(config_id, &user_query_config_ptr->config)) { + return -EFAULT; + } + } + + if (use_uuid) { + struct i915_oa_config *tmp; + int id; + + ret = mutex_lock_interruptible(&i915->perf.metrics_lock); + if (ret) + return ret; + + idr_for_each_entry(&i915->perf.metrics_idr, tmp, id) { + if (!strcmp(tmp->uuid, uuid)) { + oa_config = i915_oa_config_get(tmp); + break; + } + } + + mutex_unlock(&i915->perf.metrics_lock); + } else { + ret = i915_perf_get_oa_config(i915, config_id, &oa_config, NULL); + } + + if (ret || !oa_config) + return -ENOENT; + + if (__copy_from_user(&user_config, user_config_ptr, + sizeof(user_config))) { + ret = -EFAULT; + goto out; + } + + ret = can_copy_perf_config_registers_or_number(user_config.n_boolean_regs, + user_config.boolean_regs_ptr, + oa_config->b_counter_regs_len); + if (ret) + goto out; + + ret = can_copy_perf_config_registers_or_number(user_config.n_flex_regs, + user_config.flex_regs_ptr, + oa_config->flex_regs_len); + if (ret) + goto out; + + ret = can_copy_perf_config_registers_or_number(user_config.n_mux_regs, + user_config.mux_regs_ptr, + oa_config->mux_regs_len); + if (ret) + goto out; + + ret = copy_perf_config_registers_or_number(oa_config->b_counter_regs, + oa_config->b_counter_regs_len, + user_config.boolean_regs_ptr, + &user_config.n_boolean_regs); + if (ret) + goto out; + + ret = copy_perf_config_registers_or_number(oa_config->flex_regs, + oa_config->flex_regs_len, + user_config.flex_regs_ptr, + &user_config.n_flex_regs); + if (ret) + goto out; + + ret = copy_perf_config_registers_or_number(oa_config->mux_regs, + oa_config->mux_regs_len, + user_config.mux_regs_ptr, + &user_config.n_mux_regs); + if (ret) + goto out; + + memcpy(user_config.uuid, oa_config->uuid, sizeof(user_config.uuid)); + + if (__copy_to_user(user_config_ptr, &user_config, + sizeof(user_config))) { + ret = -EFAULT; + goto out; + } + + ret = total_size; + +out: + i915_oa_config_put(oa_config); + + return ret; +} + +static int query_perf_config_list(struct drm_i915_private *i915, + struct drm_i915_query_item *query_item) +{ + struct drm_i915_query_perf_config __user *user_query_config_ptr = + u64_to_user_ptr(query_item->data_ptr); + struct i915_oa_config *oa_config; + u32 flags, total_size; + u64 i, n_configs, *oa_config_ids; + int ret, id; + + if (!i915->perf.initialized) + return -ENODEV; + + /* Count the default test configuration */ + n_configs = i915->perf.n_metrics + 1; + total_size = sizeof(struct drm_i915_query_perf_config) + + sizeof(u64) * n_configs; + + if (query_item->length == 0) + return total_size; + + if (query_item->length < total_size) { + DRM_DEBUG("Invalid query config list item size=%u expected=%u\n", + query_item->length, total_size); + return -EINVAL; + } + + if (!access_ok(user_query_config_ptr, total_size)) + return -EFAULT; + + if (__get_user(flags, &user_query_config_ptr->flags)) + return -EFAULT; + + if (flags != 0) + return -EINVAL; + + if (__put_user(n_configs, &user_query_config_ptr->config)) + return -EFAULT; + + ret = mutex_lock_interruptible(&i915->perf.metrics_lock); + if (ret) + return ret; + + /* Count the configs. */ + n_configs = 1; + idr_for_each_entry(&i915->perf.metrics_idr, oa_config, id) + n_configs++; + + oa_config_ids = + kmalloc_array(n_configs, sizeof(*oa_config_ids), GFP_KERNEL); + if (!oa_config_ids) { + mutex_unlock(&i915->perf.metrics_lock); + return -ENOMEM; + } + + i = 0; + oa_config_ids[i++] = 1ull; + idr_for_each_entry(&i915->perf.metrics_idr, oa_config, id) + oa_config_ids[i++] = id; + + mutex_unlock(&i915->perf.metrics_lock); + + ret = copy_to_user(u64_to_user_ptr(query_item->data_ptr + + sizeof(struct drm_i915_query_perf_config)), + oa_config_ids, + n_configs * sizeof(*oa_config_ids)); + kfree(oa_config_ids); + if (ret) + return ret; + + return total_size; +} + +static int query_perf_config(struct drm_i915_private *i915, + struct drm_i915_query_item *query_item) +{ + switch (query_item->flags) { + case DRM_I915_QUERY_PERF_CONFIG_LIST: + return query_perf_config_list(i915, query_item); + case DRM_I915_QUERY_PERF_CONFIG_DATA_FOR_UUID: + return query_perf_config_data(i915, query_item, true); + case DRM_I915_QUERY_PERF_CONFIG_DATA_FOR_ID: + return query_perf_config_data(i915, query_item, false); + default: + return -EINVAL; + } +} + static int (* const i915_query_funcs[])(struct drm_i915_private *dev_priv, struct drm_i915_query_item *query_item) = { query_topology_info, query_engine_info, + query_perf_config, }; int i915_query_ioctl(struct drm_device *dev, void *data, struct drm_file *file) diff --git a/include/uapi/drm/i915_drm.h b/include/uapi/drm/i915_drm.h index 7359f190728c..545d87a722b4 100644 --- a/include/uapi/drm/i915_drm.h +++ b/include/uapi/drm/i915_drm.h @@ -1037,8 +1037,7 @@ enum drm_i915_gem_execbuffer_ext { DRM_I915_GEM_EXECBUFFER_EXT_TIMELINE_FENCES = 0, /** - * This identifier is associated with - * drm_i915_gem_execbuffer_perf_ext. + * See drm_i915_gem_execbuffer_perf_ext. */ DRM_I915_GEM_EXECBUFFER_EXT_PERF, @@ -2110,6 +2109,7 @@ struct drm_i915_query_item { __u64 query_id; #define DRM_I915_QUERY_TOPOLOGY_INFO 1 #define DRM_I915_QUERY_ENGINE_INFO 2 +#define DRM_I915_QUERY_PERF_CONFIG 3 /* Must be kept compact -- no holes and well documented */ /* @@ -2121,9 +2121,18 @@ struct drm_i915_query_item { __s32 length; /* - * Unused for now. Must be cleared to zero. + * When query_id == DRM_I915_QUERY_TOPOLOGY_INFO, must be 0. + * + * When query_id == DRM_I915_QUERY_PERF_CONFIG, must be one of the + * following : + * - DRM_I915_QUERY_PERF_CONFIG_LIST + * - DRM_I915_QUERY_PERF_CONFIG_DATA_FOR_UUID + * - DRM_I915_QUERY_PERF_CONFIG_FOR_UUID */ __u32 flags; +#define DRM_I915_QUERY_PERF_CONFIG_LIST 1 +#define DRM_I915_QUERY_PERF_CONFIG_DATA_FOR_UUID 2 +#define DRM_I915_QUERY_PERF_CONFIG_DATA_FOR_ID 3 /* * Data will be written at the location pointed by data_ptr when the @@ -2249,6 +2258,56 @@ struct drm_i915_query_engine_info { struct drm_i915_engine_info engines[]; }; +/* + * Data written by the kernel with query DRM_I915_QUERY_PERF_CONFIG. + */ +struct drm_i915_query_perf_config { + union { + /* + * When query_item.flags == DRM_I915_QUERY_PERF_CONFIG_LIST, i915 sets + * this fields to the number of configurations available. + */ + __u64 n_configs; + + /* + * When query_id == DRM_I915_QUERY_PERF_CONFIG_DATA_FOR_ID, + * i915 will use the value in this field as configuration + * identifier to decide what data to write into config_ptr. + */ + __u64 config; + + /* + * When query_id == DRM_I915_QUERY_PERF_CONFIG_DATA_FOR_UUID, + * i915 will use the value in this field as configuration + * identifier to decide what data to write into config_ptr. + * + * String formatted like "%08x-%04x-%04x-%04x-%012x" + */ + char uuid[36]; + }; + + /* + * Unused for now. Must be cleared to zero. + */ + __u32 flags; + + /* + * When query_item.flags == DRM_I915_QUERY_PERF_CONFIG_LIST, i915 will + * write an array of __u64 of configuration identifiers. + * + * When query_item.flags == DRM_I915_QUERY_PERF_CONFIG_DATA, i915 will + * write a struct drm_i915_perf_oa_config. If the following fields of + * drm_i915_perf_oa_config are set not set to 0, i915 will write into + * the associated pointers the values of submitted when the + * configuration was created : + * + * - n_mux_regs + * - n_boolean_regs + * - n_flex_regs + */ + __u8 data[]; +}; + #if defined(__cplusplus) } #endif