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[23.128.96.18]) by mx.google.com with ESMTP id e21si2045638edr.26.2020.11.01.23.48.05; Sun, 01 Nov 2020 23:48:27 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@ti.com header.s=ti-com-17Q1 header.b=BYcYXit9; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=QUARANTINE sp=NONE dis=NONE) header.from=ti.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727973AbgKBHpn (ORCPT + 99 others); Mon, 2 Nov 2020 02:45:43 -0500 Received: from fllv0016.ext.ti.com ([198.47.19.142]:59160 "EHLO fllv0016.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726819AbgKBHpn (ORCPT ); Mon, 2 Nov 2020 02:45:43 -0500 Received: from lelv0266.itg.ti.com ([10.180.67.225]) by fllv0016.ext.ti.com (8.15.2/8.15.2) with ESMTP id 0A27jeoa072868; Mon, 2 Nov 2020 01:45:40 -0600 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1604303140; bh=bvTTRAAP9RQc259vTbJiO3bSZW1rYmd9CwlKoSzaKJw=; h=Subject:To:CC:References:From:Date:In-Reply-To; b=BYcYXit935f9TFyZ/ciWNV/6Qfj1TQEpi4KepiGl07Wm4LwlQoCXVkv82ljmYvH2D w6luUIB2mCFCgl2DEtl+OaoJL8hIg0TmMjQ2/18JbXG8ZPBHbq/MPCJaUKq+WjHXw0 2kPFqpN8ajb5y3w+I3egaSS2803NOSp4UFHE95qo= Received: from DLEE115.ent.ti.com (dlee115.ent.ti.com [157.170.170.26]) by lelv0266.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 0A27jexf111792 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Mon, 2 Nov 2020 01:45:40 -0600 Received: from DLEE107.ent.ti.com (157.170.170.37) by DLEE115.ent.ti.com (157.170.170.26) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1979.3; Mon, 2 Nov 2020 01:45:40 -0600 Received: from lelv0327.itg.ti.com (10.180.67.183) by DLEE107.ent.ti.com (157.170.170.37) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1979.3 via Frontend Transport; Mon, 2 Nov 2020 01:45:40 -0600 Received: from [192.168.2.6] (ileax41-snat.itg.ti.com [10.172.224.153]) by lelv0327.itg.ti.com (8.15.2/8.15.2) with ESMTP id 0A27jcHQ046900; Mon, 2 Nov 2020 01:45:39 -0600 Subject: Re: [PATCH] dmaengine: ti: k3-udma-glue: move psi-l pairing in channel en/dis functions To: Grygorii Strashko , Vinod Koul , CC: Sekhar Nori , , Vignesh Raghavendra References: <20201030203000.4281-1-grygorii.strashko@ti.com> From: Peter Ujfalusi Message-ID: <62a8dc0b-821d-c3a6-279c-97b3082b898c@ti.com> Date: Mon, 2 Nov 2020 09:46:18 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.4.0 MIME-Version: 1.0 In-Reply-To: <20201030203000.4281-1-grygorii.strashko@ti.com> Content-Type: text/plain; charset="utf-8" Content-Language: en-US Content-Transfer-Encoding: 8bit X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 30/10/2020 22.30, Grygorii Strashko wrote: > The NAVSS UDMA will stuck if target IP module is disabled by PM while PSI-L > threads are paired UDMA<->IP and no further transfers is possible. This > could be the case for IPs J721E Main CPSW (cpsw9g). > > Hence, to avoid such situation do PSI-L threads pairing only when UDMA > channel is going to be enabled as at this time DMA consumer module expected > to be active already. Is this patch on top of the AM64 (BCDMA/PKTDMA) series or not? Will it cause any conflict? Acked-by: Peter Ujfalusi > Signed-off-by: Grygorii Strashko > --- > drivers/dma/ti/k3-udma-glue.c | 64 +++++++++++++++++++++-------------- > 1 file changed, 38 insertions(+), 26 deletions(-) > > diff --git a/drivers/dma/ti/k3-udma-glue.c b/drivers/dma/ti/k3-udma-glue.c > index a367584f0d7b..dfb65e382ab9 100644 > --- a/drivers/dma/ti/k3-udma-glue.c > +++ b/drivers/dma/ti/k3-udma-glue.c > @@ -303,19 +303,6 @@ struct k3_udma_glue_tx_channel *k3_udma_glue_request_tx_chn(struct device *dev, > goto err; > } > > - ret = xudma_navss_psil_pair(tx_chn->common.udmax, > - tx_chn->common.src_thread, > - tx_chn->common.dst_thread); > - if (ret) { > - dev_err(dev, "PSI-L request err %d\n", ret); > - goto err; > - } > - > - tx_chn->psil_paired = true; > - > - /* reset TX RT registers */ > - k3_udma_glue_disable_tx_chn(tx_chn); > - > k3_udma_glue_dump_tx_chn(tx_chn); > > return tx_chn; > @@ -378,6 +365,18 @@ EXPORT_SYMBOL_GPL(k3_udma_glue_pop_tx_chn); > > int k3_udma_glue_enable_tx_chn(struct k3_udma_glue_tx_channel *tx_chn) > { > + int ret; > + > + ret = xudma_navss_psil_pair(tx_chn->common.udmax, > + tx_chn->common.src_thread, > + tx_chn->common.dst_thread); > + if (ret) { > + dev_err(tx_chn->common.dev, "PSI-L request err %d\n", ret); > + return ret; > + } > + > + tx_chn->psil_paired = true; > + > xudma_tchanrt_write(tx_chn->udma_tchanx, UDMA_CHAN_RT_PEER_RT_EN_REG, > UDMA_PEER_RT_EN_ENABLE); > > @@ -398,6 +397,13 @@ void k3_udma_glue_disable_tx_chn(struct k3_udma_glue_tx_channel *tx_chn) > xudma_tchanrt_write(tx_chn->udma_tchanx, > UDMA_CHAN_RT_PEER_RT_EN_REG, 0); > k3_udma_glue_dump_tx_rt_chn(tx_chn, "txchn dis2"); > + > + if (tx_chn->psil_paired) { > + xudma_navss_psil_unpair(tx_chn->common.udmax, > + tx_chn->common.src_thread, > + tx_chn->common.dst_thread); > + tx_chn->psil_paired = false; > + } > } > EXPORT_SYMBOL_GPL(k3_udma_glue_disable_tx_chn); > > @@ -815,19 +821,6 @@ k3_udma_glue_request_rx_chn_priv(struct device *dev, const char *name, > goto err; > } > > - ret = xudma_navss_psil_pair(rx_chn->common.udmax, > - rx_chn->common.src_thread, > - rx_chn->common.dst_thread); > - if (ret) { > - dev_err(dev, "PSI-L request err %d\n", ret); > - goto err; > - } > - > - rx_chn->psil_paired = true; > - > - /* reset RX RT registers */ > - k3_udma_glue_disable_rx_chn(rx_chn); > - > k3_udma_glue_dump_rx_chn(rx_chn); > > return rx_chn; > @@ -1052,12 +1045,24 @@ EXPORT_SYMBOL_GPL(k3_udma_glue_rx_flow_disable); > > int k3_udma_glue_enable_rx_chn(struct k3_udma_glue_rx_channel *rx_chn) > { > + int ret; > + > if (rx_chn->remote) > return -EINVAL; > > if (rx_chn->flows_ready < rx_chn->flow_num) > return -EINVAL; > > + ret = xudma_navss_psil_pair(rx_chn->common.udmax, > + rx_chn->common.src_thread, > + rx_chn->common.dst_thread); > + if (ret) { > + dev_err(rx_chn->common.dev, "PSI-L request err %d\n", ret); > + return ret; > + } > + > + rx_chn->psil_paired = true; > + > xudma_rchanrt_write(rx_chn->udma_rchanx, UDMA_CHAN_RT_CTL_REG, > UDMA_CHAN_RT_CTL_EN); > > @@ -1078,6 +1083,13 @@ void k3_udma_glue_disable_rx_chn(struct k3_udma_glue_rx_channel *rx_chn) > xudma_rchanrt_write(rx_chn->udma_rchanx, UDMA_CHAN_RT_CTL_REG, 0); > > k3_udma_glue_dump_rx_rt_chn(rx_chn, "rxrt dis2"); > + > + if (rx_chn->psil_paired) { > + xudma_navss_psil_unpair(rx_chn->common.udmax, > + rx_chn->common.src_thread, > + rx_chn->common.dst_thread); > + rx_chn->psil_paired = false; > + } > } > EXPORT_SYMBOL_GPL(k3_udma_glue_disable_rx_chn); > > - Péter Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki. 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