From patchwork Fri Jul 5 17:17:23 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Lucas Stach X-Patchwork-Id: 11033121 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 042751510 for ; Fri, 5 Jul 2019 17:17:45 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E104F289B0 for ; Fri, 5 Jul 2019 17:17:44 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id D5AD3289E0; Fri, 5 Jul 2019 17:17:44 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 7D57E289B0 for ; Fri, 5 Jul 2019 17:17:44 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 334D56E520; Fri, 5 Jul 2019 17:17:34 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from metis.ext.pengutronix.de (metis.ext.pengutronix.de [IPv6:2001:67c:670:201:290:27ff:fe1d:cc33]) by gabe.freedesktop.org (Postfix) with ESMTPS id 0E10F6E524 for ; Fri, 5 Jul 2019 17:17:32 +0000 (UTC) Received: from dude02.hi.pengutronix.de ([2001:67c:670:100:1d::28] helo=dude02.pengutronix.de.) by metis.ext.pengutronix.de with esmtp (Exim 4.92) (envelope-from ) id 1hjRpw-0007A3-5r; Fri, 05 Jul 2019 19:17:28 +0200 From: Lucas Stach To: etnaviv@lists.freedesktop.org Subject: [PATCH v2 4/8] drm/etnaviv: replace MMU flush marker with flush sequence Date: Fri, 5 Jul 2019 19:17:23 +0200 Message-Id: <20190705171727.27501-4-l.stach@pengutronix.de> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190705171727.27501-1-l.stach@pengutronix.de> References: <20190705171727.27501-1-l.stach@pengutronix.de> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 2001:67c:670:100:1d::28 X-SA-Exim-Mail-From: l.stach@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: dri-devel@lists.freedesktop.org X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: patchwork-lst@pengutronix.de, kernel@pengutronix.de, dri-devel@lists.freedesktop.org, Russell King Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP If a MMU is shared between multiple GPUs, all of them need to flush their TLBs, so a single marker that gets reset on the first flush won't do. Replace the flush marker with a sequence number, so that it's possible to check if the TLB is in sync with the current page table state for each GPU. Signed-off-by: Lucas Stach Reviewed-by: Guido Günther --- drivers/gpu/drm/etnaviv/etnaviv_buffer.c | 9 +++++---- drivers/gpu/drm/etnaviv/etnaviv_gpu.h | 1 + drivers/gpu/drm/etnaviv/etnaviv_mmu.c | 6 +++--- drivers/gpu/drm/etnaviv/etnaviv_mmu.h | 2 +- 4 files changed, 10 insertions(+), 8 deletions(-) diff --git a/drivers/gpu/drm/etnaviv/etnaviv_buffer.c b/drivers/gpu/drm/etnaviv/etnaviv_buffer.c index 6400a88cd778..532db77624da 100644 --- a/drivers/gpu/drm/etnaviv/etnaviv_buffer.c +++ b/drivers/gpu/drm/etnaviv/etnaviv_buffer.c @@ -315,6 +315,7 @@ void etnaviv_buffer_queue(struct etnaviv_gpu *gpu, u32 exec_state, u32 return_target, return_dwords; u32 link_target, link_dwords; bool switch_context = gpu->exec_state != exec_state; + bool need_flush = gpu->flush_seq != gpu->mmu->flush_seq; lockdep_assert_held(&gpu->lock); @@ -329,14 +330,14 @@ void etnaviv_buffer_queue(struct etnaviv_gpu *gpu, u32 exec_state, * need to append a mmu flush load state, followed by a new * link to this buffer - a total of four additional words. */ - if (gpu->mmu->need_flush || switch_context) { + if (need_flush || switch_context) { u32 target, extra_dwords; /* link command */ extra_dwords = 1; /* flush command */ - if (gpu->mmu->need_flush) { + if (need_flush) { if (gpu->mmu->version == ETNAVIV_IOMMU_V1) extra_dwords += 1; else @@ -349,7 +350,7 @@ void etnaviv_buffer_queue(struct etnaviv_gpu *gpu, u32 exec_state, target = etnaviv_buffer_reserve(gpu, buffer, extra_dwords); - if (gpu->mmu->need_flush) { + if (need_flush) { /* Add the MMU flush */ if (gpu->mmu->version == ETNAVIV_IOMMU_V1) { CMD_LOAD_STATE(buffer, VIVS_GL_FLUSH_MMU, @@ -369,7 +370,7 @@ void etnaviv_buffer_queue(struct etnaviv_gpu *gpu, u32 exec_state, SYNC_RECIPIENT_PE); } - gpu->mmu->need_flush = false; + gpu->flush_seq = gpu->mmu->flush_seq; } if (switch_context) { diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gpu.h b/drivers/gpu/drm/etnaviv/etnaviv_gpu.h index 933c8d016f11..96380942cd8c 100644 --- a/drivers/gpu/drm/etnaviv/etnaviv_gpu.h +++ b/drivers/gpu/drm/etnaviv/etnaviv_gpu.h @@ -137,6 +137,7 @@ struct etnaviv_gpu { int irq; struct etnaviv_iommu *mmu; + unsigned int flush_seq; /* Power Control: */ struct clk *clk_bus; diff --git a/drivers/gpu/drm/etnaviv/etnaviv_mmu.c b/drivers/gpu/drm/etnaviv/etnaviv_mmu.c index dd81376724d7..3348d9962177 100644 --- a/drivers/gpu/drm/etnaviv/etnaviv_mmu.c +++ b/drivers/gpu/drm/etnaviv/etnaviv_mmu.c @@ -263,7 +263,7 @@ int etnaviv_iommu_map_gem(struct etnaviv_iommu *mmu, } list_add_tail(&mapping->mmu_node, &mmu->mappings); - mmu->need_flush = true; + mmu->flush_seq++; unlock: mutex_unlock(&mmu->lock); @@ -282,7 +282,7 @@ void etnaviv_iommu_unmap_gem(struct etnaviv_iommu *mmu, etnaviv_iommu_remove_mapping(mmu, mapping); list_del(&mapping->mmu_node); - mmu->need_flush = true; + mmu->flush_seq++; mutex_unlock(&mmu->lock); } @@ -371,7 +371,7 @@ int etnaviv_iommu_get_suballoc_va(struct etnaviv_iommu *mmu, } list_add_tail(&mapping->mmu_node, &mmu->mappings); - mmu->need_flush = true; + mmu->flush_seq++; } mapping->use = 1; diff --git a/drivers/gpu/drm/etnaviv/etnaviv_mmu.h b/drivers/gpu/drm/etnaviv/etnaviv_mmu.h index fe1c9d6b9334..34afe25df9ca 100644 --- a/drivers/gpu/drm/etnaviv/etnaviv_mmu.h +++ b/drivers/gpu/drm/etnaviv/etnaviv_mmu.h @@ -48,7 +48,7 @@ struct etnaviv_iommu { struct mutex lock; struct list_head mappings; struct drm_mm mm; - bool need_flush; + unsigned int flush_seq; }; struct etnaviv_gem_object;