From patchwork Wed Jan 18 11:57:49 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jani Nikula X-Patchwork-Id: 13106236 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 88FACC38159 for ; Wed, 18 Jan 2023 11:57:58 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id C484210E1C5; Wed, 18 Jan 2023 11:57:57 +0000 (UTC) Received: from mga12.intel.com (mga12.intel.com [192.55.52.136]) by gabe.freedesktop.org (Postfix) with ESMTPS id 1D9E710E1C5 for ; Wed, 18 Jan 2023 11:57:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1674043075; x=1705579075; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=wAs59py09S+fqp+sw92zzCfa3pwurGdruhg0CCjo7K0=; b=UwMpw9ErtUo85ebTyyHjEejWBBl7hqP2nIA3nJc4zIzgeMqZkoNx8ONa f4QaTmC1VBulUBWa+/1mMLWg6ZfWHSpKVV+pq9wQNRJR9uzW45/4khh3E N+SFlehbAvwVdFKeB5jqPrQxPAUeAg6ur/mS98+L51QL6Xc7RJuZWHKJe dntRSL224wwYqxPH60sQBLD171WEwYTMPls+xSFRCY5zZPldkhORzZ+sb uA7ZCQnGIKYbimktnhUGtIEEIIFxTfQ0Kwc/MNk8nRyCpaynIVFBXfiSk kVvUO3Sl5MGI8lMDL5k52p/3IZIhG3sbknzLZVMA82CvqyBrOk80wYSrr g==; X-IronPort-AV: E=McAfee;i="6500,9779,10593"; a="304646983" X-IronPort-AV: E=Sophos;i="5.97,226,1669104000"; d="scan'208";a="304646983" Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by fmsmga106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 18 Jan 2023 03:57:54 -0800 X-IronPort-AV: E=McAfee;i="6500,9779,10593"; a="723054103" X-IronPort-AV: E=Sophos;i="5.97,226,1669104000"; d="scan'208";a="723054103" Received: from kozlovdm-mobl3.ger.corp.intel.com (HELO localhost) ([10.252.28.132]) by fmsmga008-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 18 Jan 2023 03:57:53 -0800 From: Jani Nikula To: intel-gfx@lists.freedesktop.org Date: Wed, 18 Jan 2023 13:57:49 +0200 Message-Id: <20230118115749.3293888-1-jani.nikula@intel.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo Subject: [Intel-gfx] [PATCH] drm/i915: hide mkwrite_device_info() better 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: , Cc: jani.nikula@intel.com Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" The goal has been to just make device info a pointer to static const data, i.e. the static const structs in i915_pci.c. See [1]. However, there were issues with intel_device_info_runtime_init() clearing the display sub-struct of device info on the !HAS_DISPLAY() path, which consequently disables a lot of display functionality, like it should. Looks like we'd have to cover all those paths, and maybe sprinkle HAS_DISPLAY() checks in them, which we haven't gotten around to. In the mean time, hide mkwrite_device_info() better within intel_device_info.c by adding a intel_device_info_driver_create() for the very early initialization of the device info and initial runtime info. This also lets us declutter i915_drv.h a bit, and stops promoting mkwrite_device_info() as something that could be used. [1] https://lore.kernel.org/r/a0422f0a8ac055f65b7922bcd3119b180a41e79e.1655712106.git.jani.nikula@intel.com Signed-off-by: Jani Nikula --- drivers/gpu/drm/i915/i915_driver.c | 12 ++-------- drivers/gpu/drm/i915/i915_drv.h | 7 ------ drivers/gpu/drm/i915/intel_device_info.c | 29 ++++++++++++++++++++++++ drivers/gpu/drm/i915/intel_device_info.h | 2 ++ 4 files changed, 33 insertions(+), 17 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_driver.c b/drivers/gpu/drm/i915/i915_driver.c index c1e427ba57ae..e8f84789a9af 100644 --- a/drivers/gpu/drm/i915/i915_driver.c +++ b/drivers/gpu/drm/i915/i915_driver.c @@ -851,8 +851,6 @@ i915_driver_create(struct pci_dev *pdev, const struct pci_device_id *ent) { const struct intel_device_info *match_info = (struct intel_device_info *)ent->driver_data; - struct intel_device_info *device_info; - struct intel_runtime_info *runtime; struct drm_i915_private *i915; i915 = devm_drm_dev_alloc(&pdev->dev, &i915_drm_driver, @@ -865,14 +863,8 @@ i915_driver_create(struct pci_dev *pdev, const struct pci_device_id *ent) /* Device parameters start as a copy of module parameters. */ i915_params_copy(&i915->params, &i915_modparams); - /* Setup the write-once "constant" device info */ - device_info = mkwrite_device_info(i915); - memcpy(device_info, match_info, sizeof(*device_info)); - - /* Initialize initial runtime info from static const data and pdev. */ - runtime = RUNTIME_INFO(i915); - memcpy(runtime, &INTEL_INFO(i915)->__runtime, sizeof(*runtime)); - runtime->device_id = pdev->device; + /* Set up device info and initial runtime info. */ + intel_device_info_driver_create(i915, pdev->device, match_info); return i915; } diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 2ed3cb7e38d7..8ef044308ce4 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -965,11 +965,4 @@ IS_SUBPLATFORM(const struct drm_i915_private *i915, #define HAS_LMEMBAR_SMEM_STOLEN(i915) (!HAS_LMEM(i915) && \ GRAPHICS_VER_FULL(i915) >= IP_VER(12, 70)) -/* intel_device_info.c */ -static inline struct intel_device_info * -mkwrite_device_info(struct drm_i915_private *dev_priv) -{ - return (struct intel_device_info *)INTEL_INFO(dev_priv); -} - #endif diff --git a/drivers/gpu/drm/i915/intel_device_info.c b/drivers/gpu/drm/i915/intel_device_info.c index 05e90d09b208..7fa7ed6b3f70 100644 --- a/drivers/gpu/drm/i915/intel_device_info.c +++ b/drivers/gpu/drm/i915/intel_device_info.c @@ -368,6 +368,13 @@ void intel_device_info_runtime_init_early(struct drm_i915_private *i915) intel_device_info_subplatform_init(i915); } +/* FIXME: Remove this, and make device info a const pointer to rodata. */ +static struct intel_device_info * +mkwrite_device_info(struct drm_i915_private *i915) +{ + return (struct intel_device_info *)INTEL_INFO(i915); +} + /** * intel_device_info_runtime_init - initialize runtime info * @dev_priv: the i915 device @@ -529,6 +536,28 @@ void intel_device_info_runtime_init(struct drm_i915_private *dev_priv) dev_priv->drm.driver_features &= ~DRIVER_ATOMIC; } +/* + * Set up device info and initial runtime info at driver create. + * + * Note: i915 is only an allocated blob of memory at this point. + */ +void intel_device_info_driver_create(struct drm_i915_private *i915, + u16 device_id, + const struct intel_device_info *match_info) +{ + struct intel_device_info *info; + struct intel_runtime_info *runtime; + + /* Setup the write-once "constant" device info */ + info = mkwrite_device_info(i915); + memcpy(info, match_info, sizeof(*info)); + + /* Initialize initial runtime info from static const data and pdev. */ + runtime = RUNTIME_INFO(i915); + memcpy(runtime, &INTEL_INFO(i915)->__runtime, sizeof(*runtime)); + runtime->device_id = device_id; +} + void intel_driver_caps_print(const struct intel_driver_caps *caps, struct drm_printer *p) { diff --git a/drivers/gpu/drm/i915/intel_device_info.h b/drivers/gpu/drm/i915/intel_device_info.h index d588e5fd2eea..c6e1d5eba0c2 100644 --- a/drivers/gpu/drm/i915/intel_device_info.h +++ b/drivers/gpu/drm/i915/intel_device_info.h @@ -316,6 +316,8 @@ struct intel_driver_caps { const char *intel_platform_name(enum intel_platform platform); +void intel_device_info_driver_create(struct drm_i915_private *i915, u16 device_id, + const struct intel_device_info *match_info); void intel_device_info_runtime_init_early(struct drm_i915_private *dev_priv); void intel_device_info_runtime_init(struct drm_i915_private *dev_priv);