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From:   Peter Ujfalusi <peter.ujfalusi@ti.com>
To:     <vkoul@kernel.org>, <nm@ti.com>, <ssantosh@kernel.org>,
        <robh+dt@kernel.org>
CC:     <dan.j.williams@intel.com>, <t-kristo@ti.com>,
        <linux-arm-kernel@lists.infradead.org>,
        <linux-kernel@vger.kernel.org>, <devicetree@vger.kernel.org>,
        <dmaengine@vger.kernel.org>, <vigneshr@ti.com>,
        <grygorii.strashko@ti.com>
Subject: [PATCH v3 02/20] dmaengine: ti: k3-udma: Wait for peer teardown completion if supported
Date:   Tue, 8 Dec 2020 11:04:22 +0200
Message-ID: <20201208090440.31792-3-peter.ujfalusi@ti.com>
In-Reply-To: <20201208090440.31792-1-peter.ujfalusi@ti.com>
References: <20201208090440.31792-1-peter.ujfalusi@ti.com>
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Set the TDTYPE if it is supported on the platform (j721e) which will cause
UDMAP to wait for the remote peer to finish the teardown before returning
the teardown completed message.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Tested-by: Keerthy <j-keerthy@ti.com>
Reviewed-by: Grygorii Strashko <grygorii.strashko@ti.com>
---
 drivers/dma/ti/k3-udma.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/drivers/dma/ti/k3-udma.c b/drivers/dma/ti/k3-udma.c
index 0e8426dd18a7..eee43757e774 100644
--- a/drivers/dma/ti/k3-udma.c
+++ b/drivers/dma/ti/k3-udma.c
@@ -86,6 +86,7 @@ struct udma_rchan {
 
 #define UDMA_FLAG_PDMA_ACC32		BIT(0)
 #define UDMA_FLAG_PDMA_BURST		BIT(1)
+#define UDMA_FLAG_TDTYPE		BIT(2)
 
 struct udma_match_data {
 	u32 psil_base;
@@ -1589,6 +1590,13 @@ static int udma_tisci_tx_channel_config(struct udma_chan *uc)
 	req_tx.tx_fetch_size = fetch_size >> 2;
 	req_tx.txcq_qnum = tc_ring;
 	req_tx.tx_atype = uc->config.atype;
+	if (uc->config.ep_type == PSIL_EP_PDMA_XY &&
+	    ud->match_data->flags & UDMA_FLAG_TDTYPE) {
+		/* wait for peer to complete the teardown for PDMAs */
+		req_tx.valid_params |=
+				TI_SCI_MSG_VALUE_RM_UDMAP_CH_TX_TDTYPE_VALID;
+		req_tx.tx_tdtype = 1;
+	}
 
 	ret = tisci_ops->tx_ch_cfg(tisci_rm->tisci, &req_tx);
 	if (ret)
@@ -3105,14 +3113,14 @@ static struct udma_match_data am654_mcu_data = {
 static struct udma_match_data j721e_main_data = {
 	.psil_base = 0x1000,
 	.enable_memcpy_support = true,
-	.flags = UDMA_FLAG_PDMA_ACC32 | UDMA_FLAG_PDMA_BURST,
+	.flags = UDMA_FLAG_PDMA_ACC32 | UDMA_FLAG_PDMA_BURST | UDMA_FLAG_TDTYPE,
 	.statictr_z_mask = GENMASK(23, 0),
 };
 
 static struct udma_match_data j721e_mcu_data = {
 	.psil_base = 0x6000,
 	.enable_memcpy_support = false, /* MEM_TO_MEM is slow via MCU UDMA */
-	.flags = UDMA_FLAG_PDMA_ACC32 | UDMA_FLAG_PDMA_BURST,
+	.flags = UDMA_FLAG_PDMA_ACC32 | UDMA_FLAG_PDMA_BURST | UDMA_FLAG_TDTYPE,
 	.statictr_z_mask = GENMASK(23, 0),
 };
 
-- 
Peter

Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki.
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