From patchwork Thu Jul 14 12:06:26 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mauro Carvalho Chehab X-Patchwork-Id: 12917789 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 604EEC43334 for ; Thu, 14 Jul 2022 12:06:58 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 6D297112947; Thu, 14 Jul 2022 12:06:36 +0000 (UTC) Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by gabe.freedesktop.org (Postfix) with ESMTPS id 7172E1128ED; Thu, 14 Jul 2022 12:06:33 +0000 (UTC) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id C9CDA61E93; Thu, 14 Jul 2022 12:06:32 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D899DC36AEA; Thu, 14 Jul 2022 12:06:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1657800390; bh=l/GB5qX/2omcZ+N/TSC07fnT3MCn1CCDsBQ+wUVwIL0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=cGp39QqOVzRiFAmlrAlssMmW8PTqmnFiYCO3uw/XVWmBkJkqewpPVSvzNhlboXLal DqhMIk9OIoe8IL2SyjTZLO9O+u595OgVpSj4vlTRHWcI0NzzagdN3l7mgAlO5BY3jH jFx/ThDJMhOMOZsJTHlj22tQdSYHIfAcH2b7L5BlC22l0p4iLg4c1raTeAdNnsFIBz 4SWQEwtvL5anWwme5rVeXpMBgZnIUMhFR3Iuz4ygdjSUM/g9MdTWPkdiwWpyQPgIk2 jtHe6YlAFqvq6Rs/4AziV5x7vP7CmJswP8spy6qsFqKN5+T7Sm4rM+lER3D3cE1qLZ hAtqKRyF8ve7A== Received: from mchehab by mail.kernel.org with local (Exim 4.95) (envelope-from ) id 1oBxbw-0059tY-89; Thu, 14 Jul 2022 13:06:28 +0100 From: Mauro Carvalho Chehab To: Subject: [PATCH v2 21/21] drm/i915/guc: document TLB cache invalidation functions Date: Thu, 14 Jul 2022 13:06:26 +0100 Message-Id: X-Mailer: git-send-email 2.36.1 In-Reply-To: References: 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: Matthew Brost , Tvrtko Ursulin , David Airlie , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Daniele Ceraolo Spurio , Prathap Kumar Valsan , Rodrigo Vivi , Vinay Belgaumkar , Mauro Carvalho Chehab , Umesh Nerlige Ramappa , intel-gfx@lists.freedesktop.org, John Harrison , Michal Wajdeczko Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Add documentation for the kAPI functions that do TLB cache invalidation via GuC. Signed-off-by: Mauro Carvalho Chehab --- To avoid mailbombing on a large number of people, only mailing lists were C/C on the cover. See [PATCH v2 00/21] at: https://lore.kernel.org/all/cover.1657800199.git.mchehab@kernel.org/ drivers/gpu/drm/i915/gt/uc/intel_guc.c | 52 ++++++++++++++++++++++---- 1 file changed, 45 insertions(+), 7 deletions(-) diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc.c b/drivers/gpu/drm/i915/gt/uc/intel_guc.c index 98260a7bc90b..173833bc3a62 100644 --- a/drivers/gpu/drm/i915/gt/uc/intel_guc.c +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc.c @@ -923,7 +923,14 @@ static int guc_send_invalidate_tlb(struct intel_guc *guc, u32 *action, u32 size) return err; } - /* Full TLB invalidation */ +/** + * intel_guc_invalidate_tlb_full - GuC full TLB invalidation + * + * @guc: the guc + * @mode: mode of TLB cache invalidation (heavy or lite) + * + * Use GuC to do a full TLB cache invalidation if supported. + */ int intel_guc_invalidate_tlb_full(struct intel_guc *guc, enum intel_guc_tlb_inval_mode mode) { @@ -943,8 +950,17 @@ int intel_guc_invalidate_tlb_full(struct intel_guc *guc, return guc_send_invalidate_tlb(guc, action, ARRAY_SIZE(action)); } -/* - * Selective TLB Invalidation for Address Range: +/** + * intel_guc_invalidate_tlb_page_selective - GuC selective TLB invalidation + * for an address range + * + * @guc: the guc + * @mode: mode of TLB cache invalidation (heavy or lite) + * @start: range start + * @length: range length + * + * Use GuC to do a selective TLB invalidation if supported. + * * TLB's in the Address Range is Invalidated across all engines. */ int intel_guc_invalidate_tlb_page_selective(struct intel_guc *guc, @@ -978,8 +994,18 @@ int intel_guc_invalidate_tlb_page_selective(struct intel_guc *guc, return guc_send_invalidate_tlb(guc, action, ARRAY_SIZE(action)); } -/* - * Selective TLB Invalidation for Context: +/** + * intel_guc_invalidate_tlb_page_selective_ctx - GuC selective TLB + * invalidation for a context + * + * @guc: the guc + * @mode: mode of TLB cache invalidation (heavy or lite) + * @start: range start + * @length: range length + * @ctxid: context ID + * + * Use GuC to do a selective TLB invalidation on a context if supported. + * * Invalidates all TLB's for a specific context across all engines. */ int intel_guc_invalidate_tlb_page_selective_ctx(struct intel_guc *guc, @@ -1013,8 +1039,13 @@ int intel_guc_invalidate_tlb_page_selective_ctx(struct intel_guc *guc, return guc_send_invalidate_tlb(guc, action, ARRAY_SIZE(action)); } -/* - * Guc TLB Invalidation: Invalidate the TLB's of GuC itself. +/** + * intel_guc_invalidate_tlb_guc - GuC self TLB invalidation + * + * @guc: the guc + * @mode: mode of TLB cache invalidation (heavy or lite) + * + * Use GuC to invalidate the TLB's of GuC itself. */ int intel_guc_invalidate_tlb_guc(struct intel_guc *guc, enum intel_guc_tlb_inval_mode mode) @@ -1035,6 +1066,13 @@ int intel_guc_invalidate_tlb_guc(struct intel_guc *guc, return guc_send_invalidate_tlb(guc, action, ARRAY_SIZE(action)); } +/** + * intel_guc_invalidate_tlb_all - GuC global TLB invalidation + * + * @guc: the guc + * + * Use GuC to do a complete TLB invalidation on all tables + */ int intel_guc_invalidate_tlb_all(struct intel_guc *guc) { u32 action[] = {