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 A9D43C433FE for ; Tue, 8 Mar 2022 19:52:51 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 9CEAE10E4F3; Tue, 8 Mar 2022 19:52:40 +0000 (UTC) Received: from smtp-out2.suse.de (smtp-out2.suse.de [195.135.220.29]) by gabe.freedesktop.org (Postfix) with ESMTPS id 4FD6310E351 for ; Tue, 8 Mar 2022 19:52:26 +0000 (UTC) Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by smtp-out2.suse.de (Postfix) with ESMTPS id D564C1F397; Tue, 8 Mar 2022 19:52:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1646769144; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=a+byzMHiXepMwrI/FUmudhdob5zuvqrrJbTMoggtt84=; b=LnLoKEOfmeVMHsxQwm4GjnsmOv4FlG8xPjKtZmZ7D9882X0SCsXgddsPWCL352TckpBvyJ DuQsbJxMF67cr1plOp3hYqI4q8duVsZu6VgchQrUOL42yvcQ62CGS/hEOlBWIa30nHNUrn g5c3A6/QuPJWZLwZN+tRXw8xA5ipEv4= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1646769144; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=a+byzMHiXepMwrI/FUmudhdob5zuvqrrJbTMoggtt84=; b=3OChRza5e5lQ1ffNnrw9CLqQ31lhwehsI/E1Kko+pzxZ7ss/IrrhS+M4yYE3yJ9UsuIu5q sBXK7Om9khF8nhAg== Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap2.suse-dmz.suse.de (Postfix) with ESMTPS id B5A3813CFB; Tue, 8 Mar 2022 19:52:24 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id wLdmK/izJ2KKEwAAMHmgww (envelope-from ); Tue, 08 Mar 2022 19:52:24 +0000 From: Thomas Zimmermann To: patrik.r.jakobsson@gmail.com, airlied@linux.ie, daniel@ffwll.ch Subject: [PATCH v2 04/12] drm/gma500: Remove struct psb_gtt.sem sempahore Date: Tue, 8 Mar 2022 20:52:14 +0100 Message-Id: <20220308195222.13471-5-tzimmermann@suse.de> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220308195222.13471-1-tzimmermann@suse.de> References: <20220308195222.13471-1-tzimmermann@suse.de> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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: Thomas Zimmermann , dri-devel@lists.freedesktop.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" The semaphore at struct psb_mmu_driver.sem protects access to the MMU fields. Additional locking with struct psb_gtt.sem is unnecessary. Remove the field and related code. Signed-off-by: Thomas Zimmermann Acked-by: Patrik Jakobsson --- drivers/gpu/drm/gma500/gtt.c | 7 ------- drivers/gpu/drm/gma500/gtt.h | 1 - drivers/gpu/drm/gma500/psb_drv.c | 4 ---- 3 files changed, 12 deletions(-) diff --git a/drivers/gpu/drm/gma500/gtt.c b/drivers/gpu/drm/gma500/gtt.c index 4202e88e5f84..c7b7cb1f2d13 100644 --- a/drivers/gpu/drm/gma500/gtt.c +++ b/drivers/gpu/drm/gma500/gtt.c @@ -125,12 +125,6 @@ void psb_gtt_remove_pages(struct drm_psb_private *pdev, const struct resource *r mutex_unlock(&pdev->gtt_mutex); } -static void psb_gtt_alloc(struct drm_device *dev) -{ - struct drm_psb_private *dev_priv = to_drm_psb_private(dev); - init_rwsem(&dev_priv->gtt.sem); -} - void psb_gtt_takedown(struct drm_device *dev) { struct drm_psb_private *dev_priv = to_drm_psb_private(dev); @@ -166,7 +160,6 @@ int psb_gtt_init(struct drm_device *dev, int resume) if (!resume) { mutex_init(&dev_priv->gtt_mutex); mutex_init(&dev_priv->mmap_mutex); - psb_gtt_alloc(dev); } pg = &dev_priv->gtt; diff --git a/drivers/gpu/drm/gma500/gtt.h b/drivers/gpu/drm/gma500/gtt.h index ff1dcdd1ff52..31500533ac45 100644 --- a/drivers/gpu/drm/gma500/gtt.h +++ b/drivers/gpu/drm/gma500/gtt.h @@ -22,7 +22,6 @@ struct psb_gtt { unsigned gatt_pages; unsigned long stolen_size; unsigned long vram_stolen_size; - struct rw_semaphore sem; }; /* Exported functions */ diff --git a/drivers/gpu/drm/gma500/psb_drv.c b/drivers/gpu/drm/gma500/psb_drv.c index eeb681be9c95..7227a8e44d23 100644 --- a/drivers/gpu/drm/gma500/psb_drv.c +++ b/drivers/gpu/drm/gma500/psb_drv.c @@ -184,13 +184,11 @@ static void psb_driver_unload(struct drm_device *dev) if (dev_priv->mmu) { struct psb_gtt *pg = &dev_priv->gtt; - down_read(&pg->sem); psb_mmu_remove_pfn_sequence( psb_mmu_get_default_pd (dev_priv->mmu), pg->mmu_gatt_start, dev_priv->vram_stolen_size >> PAGE_SHIFT); - up_read(&pg->sem); psb_mmu_driver_takedown(dev_priv->mmu); dev_priv->mmu = NULL; } @@ -345,12 +343,10 @@ static int psb_driver_load(struct drm_device *dev, unsigned long flags) return ret; /* Add stolen memory to SGX MMU */ - down_read(&pg->sem); ret = psb_mmu_insert_pfn_sequence(psb_mmu_get_default_pd(dev_priv->mmu), dev_priv->stolen_base >> PAGE_SHIFT, pg->gatt_start, pg->stolen_size >> PAGE_SHIFT, 0); - up_read(&pg->sem); psb_mmu_set_pd_context(psb_mmu_get_default_pd(dev_priv->mmu), 0); psb_mmu_set_pd_context(dev_priv->pf_pd, 1); -- 2.35.1