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X-OriginatorOrg: xilinx.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 09 Apr 2021 17:57:35.0081 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 12d4485d-663c-4230-f8f3-08d8fb80f497 X-MS-Exchange-CrossTenant-Id: 657af505-d5df-48d0-8300-c31994686c5c X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=657af505-d5df-48d0-8300-c31994686c5c;Ip=[149.199.62.198];Helo=[xsj-pvapexch02.xlnx.xilinx.com] X-MS-Exchange-CrossTenant-AuthSource: SN1NAM02FT060.eop-nam02.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MW2PR02MB3867 Precedence: bulk List-ID: X-Mailing-List: dmaengine@vger.kernel.org Read DT property to check if AXI DMA is connected to streaming IP i.e axiethernet. If connected pass AXI4-Stream control words to dma client using metadata_ops dmaengine API. Signed-off-by: Radhey Shyam Pandey --- Changes for v2: - Use descriptor metadata API to pass control words to dma client. - Rephrased commit description to be inline with implementation. --- drivers/dma/xilinx/xilinx_dma.c | 37 +++++++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) diff --git a/drivers/dma/xilinx/xilinx_dma.c b/drivers/dma/xilinx/xilinx_dma.c index 3aded7861fef..14dcfc473e52 100644 --- a/drivers/dma/xilinx/xilinx_dma.c +++ b/drivers/dma/xilinx/xilinx_dma.c @@ -491,6 +491,7 @@ struct xilinx_dma_config { * @s2mm_chan_id: DMA s2mm channel identifier * @mm2s_chan_id: DMA mm2s channel identifier * @max_buffer_len: Max buffer length + * @has_axistream_connected: AXI DMA connected to AXI Stream IP */ struct xilinx_dma_device { void __iomem *regs; @@ -509,6 +510,7 @@ struct xilinx_dma_device { u32 s2mm_chan_id; u32 mm2s_chan_id; u32 max_buffer_len; + bool has_axistream_connected; }; /* Macros */ @@ -621,6 +623,29 @@ static inline void xilinx_aximcdma_buf(struct xilinx_dma_chan *chan, } } +/** + * xilinx_dma_get_metadata_ptr- Populate metadata pointer and payload length + * @tx: async transaction descriptor + * @payload_len: metadata payload length + * @max_len: metadata max length + * Return: The app field pointer. + */ +static void *xilinx_dma_get_metadata_ptr(struct dma_async_tx_descriptor *tx, + size_t *payload_len, size_t *max_len) +{ + struct xilinx_dma_tx_descriptor *desc = to_dma_tx_descriptor(tx); + struct xilinx_axidma_tx_segment *seg; + + *max_len = *payload_len = sizeof(u32) * XILINX_DMA_NUM_APP_WORDS; + seg = list_first_entry(&desc->segments, + struct xilinx_axidma_tx_segment, node); + return seg->hw.app; +} + +static struct dma_descriptor_metadata_ops xilinx_dma_metadata_ops = { + .get_ptr = xilinx_dma_get_metadata_ptr, +}; + /* ----------------------------------------------------------------------------- * Descriptors and segments alloc and free */ @@ -2200,6 +2225,9 @@ static struct dma_async_tx_descriptor *xilinx_dma_prep_slave_sg( segment->hw.control |= XILINX_DMA_BD_EOP; } + if (chan->xdev->has_axistream_connected) + desc->async_tx.metadata_ops = &xilinx_dma_metadata_ops; + return &desc->async_tx; error: @@ -3032,6 +3060,11 @@ static int xilinx_dma_probe(struct platform_device *pdev) } } + if (xdev->dma_config->dmatype == XDMA_TYPE_AXIDMA) { + xdev->has_axistream_connected = + of_property_read_bool(node, "xlnx,axistream-connected"); + } + if (xdev->dma_config->dmatype == XDMA_TYPE_VDMA) { err = of_property_read_u32(node, "xlnx,num-fstores", &num_frames); @@ -3057,6 +3090,10 @@ static int xilinx_dma_probe(struct platform_device *pdev) else xdev->ext_addr = false; + /* Set metadata mode */ + if (xdev->has_axistream_connected) + xdev->common.desc_metadata_modes = DESC_METADATA_ENGINE; + /* Set the dma mask bits */ dma_set_mask(xdev->dev, DMA_BIT_MASK(addr_width)); -- 2.7.4 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 91F42C433ED for ; Fri, 9 Apr 2021 18:00:31 +0000 (UTC) Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (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 B98CE6108B for ; 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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Read DT property to check if AXI DMA is connected to streaming IP i.e axiethernet. If connected pass AXI4-Stream control words to dma client using metadata_ops dmaengine API. Signed-off-by: Radhey Shyam Pandey --- Changes for v2: - Use descriptor metadata API to pass control words to dma client. - Rephrased commit description to be inline with implementation. --- drivers/dma/xilinx/xilinx_dma.c | 37 +++++++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) diff --git a/drivers/dma/xilinx/xilinx_dma.c b/drivers/dma/xilinx/xilinx_dma.c index 3aded7861fef..14dcfc473e52 100644 --- a/drivers/dma/xilinx/xilinx_dma.c +++ b/drivers/dma/xilinx/xilinx_dma.c @@ -491,6 +491,7 @@ struct xilinx_dma_config { * @s2mm_chan_id: DMA s2mm channel identifier * @mm2s_chan_id: DMA mm2s channel identifier * @max_buffer_len: Max buffer length + * @has_axistream_connected: AXI DMA connected to AXI Stream IP */ struct xilinx_dma_device { void __iomem *regs; @@ -509,6 +510,7 @@ struct xilinx_dma_device { u32 s2mm_chan_id; u32 mm2s_chan_id; u32 max_buffer_len; + bool has_axistream_connected; }; /* Macros */ @@ -621,6 +623,29 @@ static inline void xilinx_aximcdma_buf(struct xilinx_dma_chan *chan, } } +/** + * xilinx_dma_get_metadata_ptr- Populate metadata pointer and payload length + * @tx: async transaction descriptor + * @payload_len: metadata payload length + * @max_len: metadata max length + * Return: The app field pointer. + */ +static void *xilinx_dma_get_metadata_ptr(struct dma_async_tx_descriptor *tx, + size_t *payload_len, size_t *max_len) +{ + struct xilinx_dma_tx_descriptor *desc = to_dma_tx_descriptor(tx); + struct xilinx_axidma_tx_segment *seg; + + *max_len = *payload_len = sizeof(u32) * XILINX_DMA_NUM_APP_WORDS; + seg = list_first_entry(&desc->segments, + struct xilinx_axidma_tx_segment, node); + return seg->hw.app; +} + +static struct dma_descriptor_metadata_ops xilinx_dma_metadata_ops = { + .get_ptr = xilinx_dma_get_metadata_ptr, +}; + /* ----------------------------------------------------------------------------- * Descriptors and segments alloc and free */ @@ -2200,6 +2225,9 @@ static struct dma_async_tx_descriptor *xilinx_dma_prep_slave_sg( segment->hw.control |= XILINX_DMA_BD_EOP; } + if (chan->xdev->has_axistream_connected) + desc->async_tx.metadata_ops = &xilinx_dma_metadata_ops; + return &desc->async_tx; error: @@ -3032,6 +3060,11 @@ static int xilinx_dma_probe(struct platform_device *pdev) } } + if (xdev->dma_config->dmatype == XDMA_TYPE_AXIDMA) { + xdev->has_axistream_connected = + of_property_read_bool(node, "xlnx,axistream-connected"); + } + if (xdev->dma_config->dmatype == XDMA_TYPE_VDMA) { err = of_property_read_u32(node, "xlnx,num-fstores", &num_frames); @@ -3057,6 +3090,10 @@ static int xilinx_dma_probe(struct platform_device *pdev) else xdev->ext_addr = false; + /* Set metadata mode */ + if (xdev->has_axistream_connected) + xdev->common.desc_metadata_modes = DESC_METADATA_ENGINE; + /* Set the dma mask bits */ dma_set_mask(xdev->dev, DMA_BIT_MASK(addr_width)); -- 2.7.4 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel