From mboxrd@z Thu Jan 1 00:00:00 1970 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 DB6E8CCD198 for ; Wed, 8 Oct 2025 18:05:11 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 1A24C10E8A2; Wed, 8 Oct 2025 18:05:10 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="ee25RQJ0"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.21]) by gabe.freedesktop.org (Postfix) with ESMTPS id DD05C10E885 for ; Wed, 8 Oct 2025 18:05:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1759946708; x=1791482708; h=from:to:subject:date:message-id:in-reply-to:references: mime-version:content-transfer-encoding; bh=dIk8TMicjtz7qPObrJCoUDLroKf3o/Pi+PRMX5hSss0=; b=ee25RQJ0UhAXp1LOVchnmqXfjHkNejRHH3FOoIEQkxMJy3ckhQItQS/v e70p0L17ZKYbe+8V2tLHycc+vkwfxwz5kl0XwTn41pvshC9/hxTbmvRYn HBNaS7KR5ojKTriPbYoiw5mpnxfg+iD3qGaKCH29OQ7/CUMgffrWat6T0 FPQBRry3Sb4INfxVxcdVKdYU01lm8dL7O1GQFTGBf0LU0d7dPJGiyfz7H JGO6qHCASkQUrUGcWYPRAXsBe4mkoKm1Sb0ZrgfrreKsmLIO7T3qU+6Kr FrqB2UUru4fhsG8r95X137nmbn2cg+i0RdXS91O1OR7myLaAwDPiEcdgP g==; X-CSE-ConnectionGUID: 98kr77GDSyWPvvP55heSag== X-CSE-MsgGUID: YF6VTP4eTWupXaJCop3aFA== X-IronPort-AV: E=McAfee;i="6800,10657,11531"; a="62067521" X-IronPort-AV: E=Sophos;i="6.17,312,1747724400"; d="scan'208";a="62067521" Received: from orviesa001.jf.intel.com ([10.64.159.141]) by orvoesa113.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 Oct 2025 11:05:07 -0700 X-CSE-ConnectionGUID: SfTVJ0DBQ2+IAD9l/0n/Lg== X-CSE-MsgGUID: s5kU11q2TbShl1f4Y5vGEQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.19,214,1754982000"; d="scan'208";a="217593728" Received: from lstrano-desk.jf.intel.com ([10.54.39.91]) by smtpauth.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 Oct 2025 11:05:06 -0700 From: Matthew Brost To: intel-xe@lists.freedesktop.org Subject: [PATCH v9 11/34] drm/xe/vf: Remove memory allocations from VF post migration recovery Date: Wed, 8 Oct 2025 11:04:37 -0700 Message-Id: <20251008180500.3261209-12-matthew.brost@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20251008180500.3261209-1-matthew.brost@intel.com> References: <20251008180500.3261209-1-matthew.brost@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: intel-xe@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel Xe graphics driver List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-xe-bounces@lists.freedesktop.org Sender: "Intel-xe" VF post migration recovery is the path of dma-fence signaling / reclaim, avoid memory allocations in this path. v3: - s/lrc_wa_bb/scratch (Tomasz) Signed-off-by: Matthew Brost Reviewed-by: Tomasz Lis --- drivers/gpu/drm/xe/xe_gt_sriov_vf.c | 23 +++++++++++++---------- drivers/gpu/drm/xe/xe_gt_sriov_vf_types.h | 2 ++ 2 files changed, 15 insertions(+), 10 deletions(-) diff --git a/drivers/gpu/drm/xe/xe_gt_sriov_vf.c b/drivers/gpu/drm/xe/xe_gt_sriov_vf.c index 1a2cf58f5dfd..31a80d77da36 100644 --- a/drivers/gpu/drm/xe/xe_gt_sriov_vf.c +++ b/drivers/gpu/drm/xe/xe_gt_sriov_vf.c @@ -1160,17 +1160,13 @@ static size_t post_migration_scratch_size(struct xe_device *xe) static int vf_post_migration_fixups(struct xe_gt *gt) { + void *buf = gt->sriov.vf.migration.scratch; s64 shift; - void *buf; int err; - buf = kmalloc(post_migration_scratch_size(gt_to_xe(gt)), GFP_ATOMIC); - if (!buf) - return -ENOMEM; - err = xe_gt_sriov_vf_query_config(gt); if (err) - goto out; + return err; shift = xe_gt_sriov_vf_ggtt_shift(gt); if (shift) { @@ -1178,12 +1174,10 @@ static int vf_post_migration_fixups(struct xe_gt *gt) xe_gt_sriov_vf_default_lrcs_hwsp_rebase(gt); err = xe_guc_contexts_hwsp_rebase(>->uc.guc, buf); if (err) - goto out; + return err; } -out: - kfree(buf); - return err; + return 0; } static void vf_post_migration_kickstart(struct xe_gt *gt) @@ -1268,9 +1262,18 @@ static void migration_worker_func(struct work_struct *w) */ int xe_gt_sriov_vf_init_early(struct xe_gt *gt) { + void *buf; + if (!xe_sriov_vf_migration_supported(gt_to_xe(gt))) return 0; + buf = drmm_kmalloc(>_to_xe(gt)->drm, + post_migration_scratch_size(gt_to_xe(gt)), + GFP_KERNEL); + if (!buf) + return -ENOMEM; + + gt->sriov.vf.migration.scratch = buf; spin_lock_init(>->sriov.vf.migration.lock); INIT_WORK(>->sriov.vf.migration.worker, migration_worker_func); diff --git a/drivers/gpu/drm/xe/xe_gt_sriov_vf_types.h b/drivers/gpu/drm/xe/xe_gt_sriov_vf_types.h index b2c8e8c89c30..e753646debc4 100644 --- a/drivers/gpu/drm/xe/xe_gt_sriov_vf_types.h +++ b/drivers/gpu/drm/xe/xe_gt_sriov_vf_types.h @@ -55,6 +55,8 @@ struct xe_gt_sriov_vf_migration { struct work_struct worker; /** @lock: Protects recovery_queued */ spinlock_t lock; + /** @scratch: Scratch memory for VF recovery */ + void *scratch; /** @recovery_queued: VF post migration recovery in queued */ bool recovery_queued; /** @recovery_inprogress: VF post migration recovery in progress */ -- 2.34.1