From patchwork Tue Feb 27 10:14:58 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Zimmermann X-Patchwork-Id: 776335 Received: from smtp-out2.suse.de (smtp-out2.suse.de [195.135.223.131]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D1D6D13A87E for ; Tue, 27 Feb 2024 11:39:06 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=195.135.223.131 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709033948; cv=none; b=fIy/hTgc5tK00mYHHRJ4ibhya5NpvhiTQ8VQUiQYLZR9Q3HW293aVt8AVPZ2jw55R/5kZM+EPvq3XijfELntiepJs1WQ931rH03C+kFlDtVoRek9t12pAJika+EinDYwMmnPcXH4HO0rDo/f1l06IGV33y6aJXHXc9TrcTzOBj4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709033948; c=relaxed/simple; bh=JKXResYyMrU/vijQ713uF0boMqgNOmoebgx/bCQSWZ0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=XmLnCo3S0NiaY8BJOO7tHrnWJ2ga5ZYCMUAnSDB7MHNDWy5jJTcdBa0mWY35J+mVnd3AhUWTExheSeIsc1akcJDb4MZsIwYUb4UkrX9NpXnVz2nWz3Zuzx931KlALcMctYb3IfTWIpG+oIx5POkAe6nf3wr76MTgm1DRo2xKDi0= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=suse.de; spf=pass smtp.mailfrom=suse.de; dkim=pass (1024-bit key) header.d=suse.de header.i=@suse.de header.b=zlPdJuLT; dkim=permerror (0-bit key) header.d=suse.de header.i=@suse.de header.b=CZCFTYjr; dkim=pass (1024-bit key) header.d=suse.de header.i=@suse.de header.b=zlPdJuLT; dkim=permerror (0-bit key) header.d=suse.de header.i=@suse.de header.b=CZCFTYjr; arc=none smtp.client-ip=195.135.223.131 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=suse.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=suse.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=suse.de header.i=@suse.de header.b="zlPdJuLT"; dkim=permerror (0-bit key) header.d=suse.de header.i=@suse.de header.b="CZCFTYjr"; dkim=pass (1024-bit key) header.d=suse.de header.i=@suse.de header.b="zlPdJuLT"; dkim=permerror (0-bit key) header.d=suse.de header.i=@suse.de header.b="CZCFTYjr" Received: from imap2.dmz-prg2.suse.org (imap2.dmz-prg2.suse.org [IPv6:2a07:de40:b281:104:10:150:64:98]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by smtp-out2.suse.de (Postfix) with ESMTPS id 188521FD35; Tue, 27 Feb 2024 11:39:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1709033945; 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=Qv+cmNpN6bABL4zQ3D1sbnX7AZu8VR7PIhXGXWvPPk8=; b=zlPdJuLTMeoMP3U92nFgE03WfmufoZ7cfRMsBqpiUzj4JvtnCVGfUe+sPjmYa28qgtllBN OQKK8PtXp43kJsXmHEvnxh60ellP7vBgAoshNzrsL6RGGrTccY/LDoFRBW+QqIbCC2W3Jn ST5LaHghtHmj2gcvSmFHcV5+eU2wxrE= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1709033945; 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=Qv+cmNpN6bABL4zQ3D1sbnX7AZu8VR7PIhXGXWvPPk8=; b=CZCFTYjrFyk0ilK9gk56lsct47mFeBBWpjF5TmUt3P9R6GT7NduSUMUNCbCjW/tVaDdZ8F crSJkx3Gp08JMvBg== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1709033945; 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=Qv+cmNpN6bABL4zQ3D1sbnX7AZu8VR7PIhXGXWvPPk8=; b=zlPdJuLTMeoMP3U92nFgE03WfmufoZ7cfRMsBqpiUzj4JvtnCVGfUe+sPjmYa28qgtllBN OQKK8PtXp43kJsXmHEvnxh60ellP7vBgAoshNzrsL6RGGrTccY/LDoFRBW+QqIbCC2W3Jn ST5LaHghtHmj2gcvSmFHcV5+eU2wxrE= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1709033945; 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=Qv+cmNpN6bABL4zQ3D1sbnX7AZu8VR7PIhXGXWvPPk8=; b=CZCFTYjrFyk0ilK9gk56lsct47mFeBBWpjF5TmUt3P9R6GT7NduSUMUNCbCjW/tVaDdZ8F crSJkx3Gp08JMvBg== Received: from imap2.dmz-prg2.suse.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by imap2.dmz-prg2.suse.org (Postfix) with ESMTPS id 4DB9413216; Tue, 27 Feb 2024 11:39:04 +0000 (UTC) Received: from dovecot-director2.suse.de ([10.150.64.162]) by imap2.dmz-prg2.suse.org with ESMTPSA id SJ1jEdjJ3WVMUQAAn2gu4w (envelope-from ); Tue, 27 Feb 2024 11:39:04 +0000 From: Thomas Zimmermann To: daniel@ffwll.ch, airlied@gmail.com, mripard@kernel.org, maarten.lankhorst@linux.intel.com, christian.koenig@amd.com, sumit.semwal@linaro.org, dmitry.osipenko@collabora.com, robdclark@gmail.com, quic_abhinavk@quicinc.com, dmitry.baryshkov@linaro.org, sean@poorly.run, marijn.suijten@somainline.org, suijingfeng@loongson.cn, kherbst@redhat.com, lyude@redhat.com, dakr@redhat.com, airlied@redhat.com, kraxel@redhat.com, alexander.deucher@amd.com, Xinhui.Pan@amd.com, zack.rusin@broadcom.com, bcm-kernel-feedback-list@broadcom.com Cc: dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, freedreno@lists.freedesktop.org, nouveau@lists.freedesktop.org, virtualization@lists.linux.dev, spice-devel@lists.freedesktop.org, amd-gfx@lists.freedesktop.org, Thomas Zimmermann Subject: [PATCH 11/13] drm/client: Pin vmap'ed GEM buffers Date: Tue, 27 Feb 2024 11:14:58 +0100 Message-ID: <20240227113853.8464-12-tzimmermann@suse.de> X-Mailer: git-send-email 2.43.2 In-Reply-To: <20240227113853.8464-1-tzimmermann@suse.de> References: <20240227113853.8464-1-tzimmermann@suse.de> Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Authentication-Results: smtp-out2.suse.de; dkim=pass header.d=suse.de header.s=susede2_rsa header.b=zlPdJuLT; dkim=pass header.d=suse.de header.s=susede2_ed25519 header.b=CZCFTYjr X-Spamd-Result: default: False [2.68 / 50.00]; RCVD_VIA_SMTP_AUTH(0.00)[]; SPAMHAUS_XBL(0.00)[2a07:de40:b281:104:10:150:64:98:from]; TO_DN_SOME(0.00)[]; R_MISSING_CHARSET(2.50)[]; BROKEN_CONTENT_TYPE(1.50)[]; R_RATELIMIT(0.00)[to_ip_from(RLo3wgn6xaqcdyw4c639zmwwtu)]; RCVD_COUNT_THREE(0.00)[3]; DKIM_TRACE(0.00)[suse.de:+]; MX_GOOD(-0.01)[]; FREEMAIL_TO(0.00)[ffwll.ch,gmail.com,kernel.org,linux.intel.com,amd.com,linaro.org,collabora.com,quicinc.com,poorly.run,somainline.org,loongson.cn,redhat.com,broadcom.com]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; BAYES_HAM(-0.01)[48.59%]; ARC_NA(0.00)[]; R_DKIM_ALLOW(-0.20)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; FROM_HAS_DN(0.00)[]; DWL_DNSWL_MED(-2.00)[suse.de:dkim]; FREEMAIL_ENVRCPT(0.00)[gmail.com]; TO_MATCH_ENVRCPT_ALL(0.00)[]; MIME_GOOD(-0.10)[text/plain]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; RCPT_COUNT_TWELVE(0.00)[30]; MID_CONTAINS_FROM(1.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.de:dkim,suse.de:email]; FUZZY_BLOCKED(0.00)[rspamd.com]; RCVD_TLS_ALL(0.00)[] X-Rspamd-Server: rspamd1.dmz-prg2.suse.org X-Spam-Score: 2.68 X-Rspamd-Queue-Id: 188521FD35 X-Spam-Level: ** X-Spam-Flag: NO X-Spamd-Bar: ++ The function drm_client_buffer_vmap() establishes a long-term mapping of the client's buffer object into the kernel address space. Make sure that buffer does not move by pinning it to its current location. Same for vunmap with unpin. The only caller of drm_client_buffer_vmap() is fbdev-dma, which uses gem-dma. As DMA-backed GEM buffers do not move, this change is for correctness with little impact in practice. Signed-off-by: Thomas Zimmermann --- drivers/gpu/drm/drm_client.c | 24 +++++++++++++++++++++--- 1 file changed, 21 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/drm_client.c b/drivers/gpu/drm/drm_client.c index 2cc81831236b5..77fe217aeaf36 100644 --- a/drivers/gpu/drm/drm_client.c +++ b/drivers/gpu/drm/drm_client.c @@ -388,16 +388,30 @@ int drm_client_buffer_vmap(struct drm_client_buffer *buffer, struct iosys_map *map_copy) { + struct drm_gem_object *gem = buffer->gem; struct iosys_map *map = &buffer->map; int ret; - ret = drm_gem_vmap_unlocked(buffer->gem, map); + drm_gem_lock(gem); + + ret = drm_gem_pin_locked(gem); if (ret) - return ret; + goto err_drm_gem_pin_locked; + ret = drm_gem_vmap(gem, map); + if (ret) + goto err_drm_gem_vmap; + + drm_gem_unlock(gem); *map_copy = *map; return 0; + +err_drm_gem_vmap: + drm_gem_unpin_locked(buffer->gem); +err_drm_gem_pin_locked: + drm_gem_unlock(gem); + return ret; } EXPORT_SYMBOL(drm_client_buffer_vmap); @@ -411,9 +425,13 @@ EXPORT_SYMBOL(drm_client_buffer_vmap); */ void drm_client_buffer_vunmap(struct drm_client_buffer *buffer) { + struct drm_gem_object *gem = buffer->gem; struct iosys_map *map = &buffer->map; - drm_gem_vunmap_unlocked(buffer->gem, map); + drm_gem_lock(gem); + drm_gem_vunmap(gem, map); + drm_gem_unpin_locked(gem); + drm_gem_unlock(gem); } EXPORT_SYMBOL(drm_client_buffer_vunmap);