From patchwork Thu Sep 30 02:47:02 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?SmFzb24tSkggTGluICjmnpfnnb/npaUp?= X-Patchwork-Id: 12527187 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 77236C433EF for ; Thu, 30 Sep 2021 02:47:24 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 3D0DB617E6 for ; Thu, 30 Sep 2021 02:47:24 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 3D0DB617E6 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=mediatek.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 802F16EB38; Thu, 30 Sep 2021 02:47:17 +0000 (UTC) Received: from mailgw02.mediatek.com (unknown [210.61.82.184]) by gabe.freedesktop.org (Postfix) with ESMTPS id F34736E2DC for ; Thu, 30 Sep 2021 02:47:10 +0000 (UTC) X-UUID: d4da3c2b99de4599a9f95313f00b93d3-20210930 X-UUID: d4da3c2b99de4599a9f95313f00b93d3-20210930 Received: from mtkcas11.mediatek.inc [(172.21.101.40)] by mailgw02.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 1260240225; Thu, 30 Sep 2021 10:47:06 +0800 Received: from mtkcas10.mediatek.inc (172.21.101.39) by mtkmbs07n1.mediatek.inc (172.21.101.16) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Thu, 30 Sep 2021 10:47:06 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkcas10.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Thu, 30 Sep 2021 10:47:06 +0800 From: jason-jh.lin To: Chun-Kuang Hu , Philipp Zabel CC: David Airlie , Daniel Vetter , Matthias Brugger , Yongqiang Niu , , , , , , , , , Subject: [v2 PATCH 1/3] drm/mediatek: Fix crash at using pkt->cl->chan in cmdq_pkt_finalize Date: Thu, 30 Sep 2021 10:47:02 +0800 Message-ID: <20210930024704.6966-2-jason-jh.lin@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20210930024704.6966-1-jason-jh.lin@mediatek.com> References: <20210930024704.6966-1-jason-jh.lin@mediatek.com> MIME-Version: 1.0 X-MTK: N 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: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Because mtk_drm_crtc_create_pkt didn't assign pkt->cl, it will crash at using pkt->cl->chan in cmdq_pkt_finalize. So add struct cmdq_client and let mtk_drm_crtc instance define cmdq_client as: struct mtk_drm_crtc { /* client instance data */ struct cmdq_client cmdq_client; }; and in rx_callback function can use pkt->cl to get struct cmdq_client. Fixes: f4be17cd5b14 ("drm/mediatek: Remove struct cmdq_client") Signed-off-by: jason-jh.lin --- drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 73 +++++++++++++------------ 1 file changed, 38 insertions(+), 35 deletions(-) diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c index 5f81489fc60c..411d99fcbb8f 100644 --- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c +++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c @@ -52,8 +52,7 @@ struct mtk_drm_crtc { bool pending_async_planes; #if IS_REACHABLE(CONFIG_MTK_CMDQ) - struct mbox_client cmdq_cl; - struct mbox_chan *cmdq_chan; + struct cmdq_client cmdq_client; struct cmdq_pkt cmdq_handle; u32 cmdq_event; u32 cmdq_vblank_cnt; @@ -227,8 +226,8 @@ struct mtk_ddp_comp *mtk_drm_ddp_comp_for_plane(struct drm_crtc *crtc, } #if IS_REACHABLE(CONFIG_MTK_CMDQ) -static int mtk_drm_cmdq_pkt_create(struct mbox_chan *chan, struct cmdq_pkt *pkt, - size_t size) +static int mtk_drm_cmdq_pkt_create(struct cmdq_client *client, struct cmdq_pkt *pkt, + size_t size) { struct device *dev; dma_addr_t dma_addr; @@ -239,8 +238,9 @@ static int mtk_drm_cmdq_pkt_create(struct mbox_chan *chan, struct cmdq_pkt *pkt, return -ENOMEM; } pkt->buf_size = size; + pkt->cl = (void *)client; - dev = chan->mbox->dev; + dev = client->chan->mbox->dev; dma_addr = dma_map_single(dev, pkt->va_base, pkt->buf_size, DMA_TO_DEVICE); if (dma_mapping_error(dev, dma_addr)) { @@ -255,9 +255,11 @@ static int mtk_drm_cmdq_pkt_create(struct mbox_chan *chan, struct cmdq_pkt *pkt, return 0; } -static void mtk_drm_cmdq_pkt_destroy(struct mbox_chan *chan, struct cmdq_pkt *pkt) +static void mtk_drm_cmdq_pkt_destroy(struct cmdq_pkt *pkt) { - dma_unmap_single(chan->mbox->dev, pkt->pa_base, pkt->buf_size, + struct cmdq_client *client = (struct cmdq_client *)pkt->cl; + + dma_unmap_single(client->chan->mbox->dev, pkt->pa_base, pkt->buf_size, DMA_TO_DEVICE); kfree(pkt->va_base); kfree(pkt); @@ -265,8 +267,9 @@ static void mtk_drm_cmdq_pkt_destroy(struct mbox_chan *chan, struct cmdq_pkt *pk static void ddp_cmdq_cb(struct mbox_client *cl, void *mssg) { - struct mtk_drm_crtc *mtk_crtc = container_of(cl, struct mtk_drm_crtc, cmdq_cl); struct cmdq_cb_data *data = mssg; + struct cmdq_client *cmdq_cl = container_of(cl, struct cmdq_client, client); + struct mtk_drm_crtc *mtk_crtc = container_of(cmdq_cl, struct mtk_drm_crtc, cmdq_client); struct mtk_crtc_state *state; unsigned int i; @@ -299,7 +302,7 @@ static void ddp_cmdq_cb(struct mbox_client *cl, void *mssg) } mtk_crtc->cmdq_vblank_cnt = 0; - mtk_drm_cmdq_pkt_destroy(mtk_crtc->cmdq_chan, data->pkt); + mtk_drm_cmdq_pkt_destroy(data->pkt); } #endif @@ -550,24 +553,24 @@ static void mtk_drm_crtc_update_config(struct mtk_drm_crtc *mtk_crtc, mtk_mutex_release(mtk_crtc->mutex); } #if IS_REACHABLE(CONFIG_MTK_CMDQ) - if (mtk_crtc->cmdq_chan) { - mbox_flush(mtk_crtc->cmdq_chan, 2000); + if (mtk_crtc->cmdq_client.chan) { + mbox_flush(mtk_crtc->cmdq_client.chan, 2000); cmdq_handle->cmd_buf_size = 0; cmdq_pkt_clear_event(cmdq_handle, mtk_crtc->cmdq_event); cmdq_pkt_wfe(cmdq_handle, mtk_crtc->cmdq_event, false); mtk_crtc_ddp_config(crtc, cmdq_handle); cmdq_pkt_finalize(cmdq_handle); - dma_sync_single_for_device(mtk_crtc->cmdq_chan->mbox->dev, - cmdq_handle->pa_base, - cmdq_handle->cmd_buf_size, - DMA_TO_DEVICE); + dma_sync_single_for_device(mtk_crtc->cmdq_client.chan->mbox->dev, + cmdq_handle->pa_base, + cmdq_handle->cmd_buf_size, + DMA_TO_DEVICE); /* * CMDQ command should execute in next vblank, * If it fail to execute in next 2 vblank, timeout happen. */ mtk_crtc->cmdq_vblank_cnt = 2; - mbox_send_message(mtk_crtc->cmdq_chan, cmdq_handle); - mbox_client_txdone(mtk_crtc->cmdq_chan, 0); + mbox_send_message(mtk_crtc->cmdq_client.chan, cmdq_handle); + mbox_client_txdone(mtk_crtc->cmdq_client.chan, 0); } #endif mtk_crtc->config_updating = false; @@ -581,7 +584,7 @@ static void mtk_crtc_ddp_irq(void *data) struct mtk_drm_private *priv = crtc->dev->dev_private; #if IS_REACHABLE(CONFIG_MTK_CMDQ) - if (!priv->data->shadow_register && !mtk_crtc->cmdq_chan) + if (!priv->data->shadow_register && !mtk_crtc->cmdq_client.chan) mtk_crtc_ddp_config(crtc, NULL); else if (mtk_crtc->cmdq_vblank_cnt > 0 && --mtk_crtc->cmdq_vblank_cnt == 0) DRM_ERROR("mtk_crtc %d CMDQ execute command timeout!\n", @@ -924,20 +927,20 @@ int mtk_drm_crtc_create(struct drm_device *drm_dev, mutex_init(&mtk_crtc->hw_lock); #if IS_REACHABLE(CONFIG_MTK_CMDQ) - mtk_crtc->cmdq_cl.dev = mtk_crtc->mmsys_dev; - mtk_crtc->cmdq_cl.tx_block = false; - mtk_crtc->cmdq_cl.knows_txdone = true; - mtk_crtc->cmdq_cl.rx_callback = ddp_cmdq_cb; - mtk_crtc->cmdq_chan = - mbox_request_channel(&mtk_crtc->cmdq_cl, - drm_crtc_index(&mtk_crtc->base)); - if (IS_ERR(mtk_crtc->cmdq_chan)) { + mtk_crtc->cmdq_client.client.dev = mtk_crtc->mmsys_dev; + mtk_crtc->cmdq_client.client.tx_block = false; + mtk_crtc->cmdq_client.client.knows_txdone = true; + mtk_crtc->cmdq_client.client.rx_callback = ddp_cmdq_cb; + mtk_crtc->cmdq_client.chan = + mbox_request_channel(&mtk_crtc->cmdq_client.client, + drm_crtc_index(&mtk_crtc->base)); + if (IS_ERR(mtk_crtc->cmdq_client.chan)) { dev_dbg(dev, "mtk_crtc %d failed to create mailbox client, writing register by CPU now\n", drm_crtc_index(&mtk_crtc->base)); - mtk_crtc->cmdq_chan = NULL; + mtk_crtc->cmdq_client.chan = NULL; } - if (mtk_crtc->cmdq_chan) { + if (mtk_crtc->cmdq_client.chan) { ret = of_property_read_u32_index(priv->mutex_node, "mediatek,gce-events", drm_crtc_index(&mtk_crtc->base), @@ -945,17 +948,17 @@ int mtk_drm_crtc_create(struct drm_device *drm_dev, if (ret) { dev_dbg(dev, "mtk_crtc %d failed to get mediatek,gce-events property\n", drm_crtc_index(&mtk_crtc->base)); - mbox_free_channel(mtk_crtc->cmdq_chan); - mtk_crtc->cmdq_chan = NULL; + mbox_free_channel(mtk_crtc->cmdq_client.chan); + mtk_crtc->cmdq_client.chan = NULL; } else { - ret = mtk_drm_cmdq_pkt_create(mtk_crtc->cmdq_chan, - &mtk_crtc->cmdq_handle, - PAGE_SIZE); + ret = mtk_drm_cmdq_pkt_create(&mtk_crtc->cmdq_client, + &mtk_crtc->cmdq_handle, + PAGE_SIZE); if (ret) { dev_dbg(dev, "mtk_crtc %d failed to create cmdq packet\n", drm_crtc_index(&mtk_crtc->base)); - mbox_free_channel(mtk_crtc->cmdq_chan); - mtk_crtc->cmdq_chan = NULL; + mbox_free_channel(mtk_crtc->cmdq_client.chan); + mtk_crtc->cmdq_client.chan = NULL; } } }