From patchwork Thu Dec 19 18:00:12 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tvrtko Ursulin X-Patchwork-Id: 11304141 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 8B21B14E3 for ; Thu, 19 Dec 2019 18:00:40 +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 723512465E for ; Thu, 19 Dec 2019 18:00:40 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 723512465E Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=intel-gfx-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 23B736E3A0; Thu, 19 Dec 2019 18:00:37 +0000 (UTC) X-Original-To: Intel-gfx@lists.freedesktop.org Delivered-To: Intel-gfx@lists.freedesktop.org Received: from mga05.intel.com (mga05.intel.com [192.55.52.43]) by gabe.freedesktop.org (Postfix) with ESMTPS id 9A8D26E394 for ; Thu, 19 Dec 2019 18:00:28 +0000 (UTC) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga007.jf.intel.com ([10.7.209.58]) by fmsmga105.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 19 Dec 2019 10:00:28 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.69,332,1571727600"; d="scan'208";a="206283863" Received: from dtriolet-mobl1.ger.corp.intel.com (HELO localhost.localdomain) ([10.251.84.191]) by orsmga007.jf.intel.com with ESMTP; 19 Dec 2019 10:00:27 -0800 From: Tvrtko Ursulin To: Intel-gfx@lists.freedesktop.org Date: Thu, 19 Dec 2019 18:00:12 +0000 Message-Id: <20191219180019.25562-2-tvrtko.ursulin@linux.intel.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191219180019.25562-1-tvrtko.ursulin@linux.intel.com> References: <20191219180019.25562-1-tvrtko.ursulin@linux.intel.com> MIME-Version: 1.0 Subject: [Intel-gfx] [RFC 1/8] drm/i915: Switch context id allocation directoy to xarray X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 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" From: Tvrtko Ursulin Idr internally uses xarray so we can use it directly which simplifies our code by removing the need to do external locking. Signed-off-by: Tvrtko Ursulin Reviewed-by: Chris Wilson --- drivers/gpu/drm/i915/gem/i915_gem_context.c | 51 ++++++++----------- .../gpu/drm/i915/gem/selftests/mock_context.c | 3 +- drivers/gpu/drm/i915/i915_drv.h | 6 +-- 3 files changed, 25 insertions(+), 35 deletions(-) diff --git a/drivers/gpu/drm/i915/gem/i915_gem_context.c b/drivers/gpu/drm/i915/gem/i915_gem_context.c index 6618c0c6506c..e5a7c6f02a47 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_context.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_context.c @@ -780,12 +780,6 @@ void i915_gem_driver_release__contexts(struct drm_i915_private *i915) flush_work(&i915->gem.contexts.free_work); } -static int context_idr_cleanup(int id, void *p, void *data) -{ - context_close(p); - return 0; -} - static int vm_idr_cleanup(int id, void *p, void *data) { i915_vm_put(p); @@ -793,7 +787,8 @@ static int vm_idr_cleanup(int id, void *p, void *data) } static int gem_context_register(struct i915_gem_context *ctx, - struct drm_i915_file_private *fpriv) + struct drm_i915_file_private *fpriv, + u32 *id) { struct i915_address_space *vm; int ret; @@ -811,14 +806,10 @@ static int gem_context_register(struct i915_gem_context *ctx, current->comm, pid_nr(ctx->pid)); /* And finally expose ourselves to userspace via the idr */ - mutex_lock(&fpriv->context_idr_lock); - ret = idr_alloc(&fpriv->context_idr, ctx, 0, 0, GFP_KERNEL); - mutex_unlock(&fpriv->context_idr_lock); - if (ret >= 0) - goto out; + ret = xa_alloc(&fpriv->context_xa, id, ctx, xa_limit_32b, GFP_KERNEL); + if (ret) + put_pid(fetch_and_zero(&ctx->pid)); - put_pid(fetch_and_zero(&ctx->pid)); -out: return ret; } @@ -828,11 +819,11 @@ int i915_gem_context_open(struct drm_i915_private *i915, struct drm_i915_file_private *file_priv = file->driver_priv; struct i915_gem_context *ctx; int err; + u32 id; - mutex_init(&file_priv->context_idr_lock); - mutex_init(&file_priv->vm_idr_lock); + xa_init_flags(&file_priv->context_xa, XA_FLAGS_ALLOC); - idr_init(&file_priv->context_idr); + mutex_init(&file_priv->vm_idr_lock); idr_init_base(&file_priv->vm_idr, 1); ctx = i915_gem_create_context(i915, 0); @@ -841,12 +832,12 @@ int i915_gem_context_open(struct drm_i915_private *i915, goto err; } - err = gem_context_register(ctx, file_priv); + err = gem_context_register(ctx, file_priv, &id); if (err < 0) goto err_ctx; + GEM_BUG_ON(id); GEM_BUG_ON(i915_gem_context_is_kernel(ctx)); - GEM_BUG_ON(err > 0); return 0; @@ -854,9 +845,8 @@ int i915_gem_context_open(struct drm_i915_private *i915, context_close(ctx); err: idr_destroy(&file_priv->vm_idr); - idr_destroy(&file_priv->context_idr); + xa_destroy(&file_priv->context_xa); mutex_destroy(&file_priv->vm_idr_lock); - mutex_destroy(&file_priv->context_idr_lock); return err; } @@ -864,10 +854,12 @@ void i915_gem_context_close(struct drm_file *file) { struct drm_i915_file_private *file_priv = file->driver_priv; struct drm_i915_private *i915 = file_priv->dev_priv; + struct i915_gem_context *ctx; + unsigned long idx; - idr_for_each(&file_priv->context_idr, context_idr_cleanup, NULL); - idr_destroy(&file_priv->context_idr); - mutex_destroy(&file_priv->context_idr_lock); + xa_for_each(&file_priv->context_xa, idx, ctx) + context_close(ctx); + xa_destroy(&file_priv->context_xa); idr_for_each(&file_priv->vm_idr, vm_idr_cleanup, NULL); idr_destroy(&file_priv->vm_idr); @@ -2180,6 +2172,7 @@ int i915_gem_context_create_ioctl(struct drm_device *dev, void *data, struct drm_i915_gem_context_create_ext *args = data; struct create_ext ext_data; int ret; + u32 id; if (!DRIVER_CAPS(i915)->has_logical_contexts) return -ENODEV; @@ -2211,11 +2204,11 @@ int i915_gem_context_create_ioctl(struct drm_device *dev, void *data, goto err_ctx; } - ret = gem_context_register(ext_data.ctx, ext_data.fpriv); + ret = gem_context_register(ext_data.ctx, ext_data.fpriv, &id); if (ret < 0) goto err_ctx; - args->ctx_id = ret; + args->ctx_id = id; DRM_DEBUG("HW context %d created\n", args->ctx_id); return 0; @@ -2238,11 +2231,7 @@ int i915_gem_context_destroy_ioctl(struct drm_device *dev, void *data, if (!args->ctx_id) return -ENOENT; - if (mutex_lock_interruptible(&file_priv->context_idr_lock)) - return -EINTR; - - ctx = idr_remove(&file_priv->context_idr, args->ctx_id); - mutex_unlock(&file_priv->context_idr_lock); + ctx = xa_erase(&file_priv->context_xa, args->ctx_id); if (!ctx) return -ENOENT; diff --git a/drivers/gpu/drm/i915/gem/selftests/mock_context.c b/drivers/gpu/drm/i915/gem/selftests/mock_context.c index 53e89efb09c0..0bdc26fe9c76 100644 --- a/drivers/gpu/drm/i915/gem/selftests/mock_context.c +++ b/drivers/gpu/drm/i915/gem/selftests/mock_context.c @@ -77,12 +77,13 @@ live_context(struct drm_i915_private *i915, struct file *file) { struct i915_gem_context *ctx; int err; + u32 id; ctx = i915_gem_create_context(i915, 0); if (IS_ERR(ctx)) return ctx; - err = gem_context_register(ctx, to_drm_file(file)->driver_priv); + err = gem_context_register(ctx, to_drm_file(file)->driver_priv, &id); if (err < 0) goto err_ctx; diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 0781b6326b8c..9226c0515506 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -46,6 +46,7 @@ #include #include #include +#include #include #include /* for struct drm_dma_handle */ @@ -201,8 +202,7 @@ struct drm_i915_file_private { struct list_head request_list; } mm; - struct idr context_idr; - struct mutex context_idr_lock; /* guards context_idr */ + struct xarray context_xa; struct idr vm_idr; struct mutex vm_idr_lock; /* guards vm_idr */ @@ -1892,7 +1892,7 @@ struct dma_buf *i915_gem_prime_export(struct drm_gem_object *gem_obj, int flags) static inline struct i915_gem_context * __i915_gem_context_lookup_rcu(struct drm_i915_file_private *file_priv, u32 id) { - return idr_find(&file_priv->context_idr, id); + return xa_load(&file_priv->context_xa, id); } static inline struct i915_gem_context *