From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E9E9323506E; Wed, 21 May 2025 07:17:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747811825; cv=none; b=VTcJkVil0Mj5rdQeMpILqiZBc4U6aHhvnAMlxcd87W7Srcfr1jrDKdAbpcJS1lrDnh54Ff1CGtKn2A6O4fPKPePqWGcs95+0JR3Cv1C53JRP5ObMF+vnDAIYwZVhj+Wvn3LrZ+f/nR/x664fNHPUqCzM0aeQcuVqygYNbUrV20M= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747811825; c=relaxed/simple; bh=HtIvyLnzoLGjuDqzE4ebbNLd1tqZk4KAODJR9iSVbWk=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=bLAoJbaPH333/kRC0JchHfl5m9w/KJjT0MHzeY1/Yozsb0jm9kNqo3lqCtoMLp3zvAD6s8+hjT1X7ozwQapsM2mc3xoK3rhLm55cFC+wzDQV0BHKdsnfWJrse8JY0fIfT3no3LNBF7oH4Wdfzq7LsNetcghX+Nhs5U+/LmtzYGA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=C2Ui8NHh; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="C2Ui8NHh" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1A9C5C4CEE4; Wed, 21 May 2025 07:17:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1747811824; bh=HtIvyLnzoLGjuDqzE4ebbNLd1tqZk4KAODJR9iSVbWk=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=C2Ui8NHhPFH6M03XcKi2a+9CZJPEWCFLkQV7SEWIlOLD99SP4cIR4gfZDyV7i1X2W vafLSzqRSCrRYQDRvJhseBIe+kFRYtPLXrFXoXCG4cgtItqbo63c5VQg1hQ+WQMQbo 41R+Ym1v7VfnKx8xRozWrrEB3h65YJYycIt1x8rqMU45pl6tq8GnHHfuQ6NZxyBBDf bcAvRbZaK2Eju2JfvoBuqqoGltcJc/mk5fXCSlE5I0NpaQDFfcNDKpNUdFGA2h1b3s VkCm0IIWMvj0C4ygK60N81EKuH7n7VlO5JJcL83WhHxUyLl3xEv7Pw2gyC1SfRiR71 xhmvinhcVzYng== From: Lorenzo Bianconi Date: Wed, 21 May 2025 09:16:38 +0200 Subject: [PATCH net-next v3 3/4] net: airoha: Add the capability to allocate hwfd buffers via reserved-memory Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20250521-airopha-desc-sram-v3-3-a6e9b085b4f0@kernel.org> References: <20250521-airopha-desc-sram-v3-0-a6e9b085b4f0@kernel.org> In-Reply-To: <20250521-airopha-desc-sram-v3-0-a6e9b085b4f0@kernel.org> To: Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Lorenzo Bianconi Cc: linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, netdev@vger.kernel.org, devicetree@vger.kernel.org X-Mailer: b4 0.14.2 In some configurations QDMA blocks require a contiguous block of system memory for hwfd buffers queue. Introduce the capability to allocate hw buffers forwarding queue via the reserved-memory DTS property instead of running dmam_alloc_coherent(). Signed-off-by: Lorenzo Bianconi --- drivers/net/ethernet/airoha/airoha_eth.c | 33 +++++++++++++++++++++++++++++--- 1 file changed, 30 insertions(+), 3 deletions(-) diff --git a/drivers/net/ethernet/airoha/airoha_eth.c b/drivers/net/ethernet/airoha/airoha_eth.c index 5f7cbbcbb1d469836dfcea95137c960bfd076744..20e590d76735e72a1a538a42d2a1f49b882deccc 100644 --- a/drivers/net/ethernet/airoha/airoha_eth.c +++ b/drivers/net/ethernet/airoha/airoha_eth.c @@ -5,6 +5,7 @@ */ #include #include +#include #include #include #include @@ -1076,9 +1077,11 @@ static void airoha_qdma_cleanup_tx_queue(struct airoha_queue *q) static int airoha_qdma_init_hfwd_queues(struct airoha_qdma *qdma) { struct airoha_eth *eth = qdma->eth; + int id = qdma - ð->qdma[0]; dma_addr_t dma_addr; + const char *name; + int size, index; u32 status; - int size; size = HW_DSCP_NUM * sizeof(struct airoha_qdma_fwd_desc); if (!dmam_alloc_coherent(eth->dev, size, &dma_addr, GFP_KERNEL)) @@ -1086,10 +1089,34 @@ static int airoha_qdma_init_hfwd_queues(struct airoha_qdma *qdma) airoha_qdma_wr(qdma, REG_FWD_DSCP_BASE, dma_addr); - size = AIROHA_MAX_PACKET_SIZE * HW_DSCP_NUM; - if (!dmam_alloc_coherent(eth->dev, size, &dma_addr, GFP_KERNEL)) + name = devm_kasprintf(eth->dev, GFP_KERNEL, "qdma%d-buf", id); + if (!name) return -ENOMEM; + index = of_property_match_string(eth->dev->of_node, + "memory-region-names", name); + if (index >= 0) { + struct reserved_mem *rmem; + struct device_node *np; + + /* Consume reserved memory for hw forwarding buffers queue if + * available in the DTS + */ + np = of_parse_phandle(eth->dev->of_node, "memory-region", + index); + if (!np) + return -ENODEV; + + rmem = of_reserved_mem_lookup(np); + of_node_put(np); + dma_addr = rmem->base; + } else { + size = AIROHA_MAX_PACKET_SIZE * HW_DSCP_NUM; + if (!dmam_alloc_coherent(eth->dev, size, &dma_addr, + GFP_KERNEL)) + return -ENOMEM; + } + airoha_qdma_wr(qdma, REG_FWD_BUF_BASE, dma_addr); airoha_qdma_rmw(qdma, REG_HW_FWD_DSCP_CFG, -- 2.49.0