From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from pandora.armlinux.org.uk (pandora.armlinux.org.uk [78.32.30.218]) (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 A5EA4318B85; Sat, 14 Mar 2026 09:42:48 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=78.32.30.218 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773481370; cv=none; b=A4R9WfNElUL2stLm3Vbg8JveYQSukRfln3git4wi+n6u+4vVHhISFSROynjIvzYz8YbXaZM8fPEYRo/gtsTpGLll1a+V9dublmCN53DiWoTwiI9vaQUl3O/zD6Tw90db2mUGZ5OoIagcUbp9PovsPsnmWVOrrpTMuHEJGz3JZdo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773481370; c=relaxed/simple; bh=+WVosI6iUk+esIVtNGtBxUDX1RSKOqIH5i/f7lsmpHY=; h=In-Reply-To:References:From:To:Cc:Subject:MIME-Version: Content-Disposition:Content-Type:Message-Id:Date; b=CwUF16bOF8rhoqiHpHo2E1kBRHd9glLAi8j19/sOZyz8tB0e+WsJEemNvPTpPHK38JEjvANYpqn4C0EUfUYBhZ3OOqy25oXJwyLBN/lsihQXnwqL2yq6i89v4SS8SUlnSa3AHWjo6RW5/qZb5nbfk1g3U2jboeyICG3JinNQ5Ko= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=armlinux.org.uk; spf=none smtp.mailfrom=armlinux.org.uk; dkim=pass (2048-bit key) header.d=armlinux.org.uk header.i=@armlinux.org.uk header.b=DpCwnpTu; arc=none smtp.client-ip=78.32.30.218 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=armlinux.org.uk Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=armlinux.org.uk Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=armlinux.org.uk header.i=@armlinux.org.uk header.b="DpCwnpTu" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=armlinux.org.uk; s=pandora-2019; h=Date:Sender:Message-Id:Content-Type: Content-Transfer-Encoding:MIME-Version:Subject:Cc:To:From:References: In-Reply-To:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help: List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=sjmjh9LqgSfqY7476rGy7BOUo6MdY+yHA2slM9LQGLY=; b=DpCwnpTuPAvMZIJIjm8NRgFS0q j0QnfFaLNfKw02brsuCvBf4Q//jpZ2nQMkdowhgkNedJ2+gCZFUIHUyw3dTs5iEX6gp5JEecRFmKz ulrgOk4VvBDRQ5pCcgJYj+ImwBYF9FU2z++ukNANENd0r3POPuco/5bfd59ZTwKH3+q228T13AmfB o65HfR8iWn+IdwgfFfbYosw9PnTE8Rn82mUCp+tSlF1mdLolS5JzUoA8Jdf4u9WLNEzNkGAhQUi9M jdNs0bHEf55Z9bMBOd7L6d9ZcDmtO0+NUNhkc56egb/h8lp4TxJp31G8SPW2wCUQN8C7Ntq1oNP3E 10FD7tTQ==; Received: from e0022681537dd.dyn.armlinux.org.uk ([fd8f:7570:feb6:1:222:68ff:fe15:37dd]:42924 helo=rmk-PC.armlinux.org.uk) by pandora.armlinux.org.uk with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.98.2) (envelope-from ) id 1w1LW5-0000000020U-2u7E; Sat, 14 Mar 2026 09:42:42 +0000 Received: from rmk by rmk-PC.armlinux.org.uk with local (Exim 4.98.2) (envelope-from ) id 1w1LW4-0000000DGS3-1J49; Sat, 14 Mar 2026 09:42:40 +0000 In-Reply-To: References: From: "Russell King (Oracle)" To: Andrew Lunn Cc: Alexandre Torgue , Alexei Starovoitov , Andrew Lunn , bpf@vger.kernel.org, Daniel Borkmann , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Jesper Dangaard Brouer , linux-arm-kernel@lists.infradead.org, linux-stm32@st-md-mailman.stormreply.com, netdev@vger.kernel.org, Paolo Abeni , Stanislav Fomichev Subject: [PATCH net-next v4 04/15] net: stmmac: add helper to get hardware receive descriptor Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Disposition: inline Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset="utf-8" Message-Id: Sender: Russell King Date: Sat, 14 Mar 2026 09:42:40 +0000 Provide a helper to get a hardware receive descriptor that takes account of whether extended format is being used, but returning the base struct dma_desc pointer. This avoids multiple instances where this is open coded. Signed-off-by: Russell King (Oracle) --- .../net/ethernet/stmicro/stmmac/stmmac_main.c | 76 +++++++------------ 1 file changed, 26 insertions(+), 50 deletions(-) diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c index 765b168df50d..a3dfd3501604 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c @@ -362,6 +362,16 @@ static inline u32 stmmac_tx_avail(struct stmmac_priv *priv, u32 queue) priv->dma_conf.dma_tx_size); } +static struct dma_desc *stmmac_get_rx_desc(struct stmmac_priv *priv, + struct stmmac_rx_queue *rx_q, + unsigned int index) +{ + if (priv->extend_desc) + return &rx_q->dma_erx[index].basic; + else + return &rx_q->dma_rx[index]; +} + /** * stmmac_rx_dirty - Get RX queue dirty * @priv: driver private structure @@ -1421,13 +1431,11 @@ static void stmmac_display_rx_rings(struct stmmac_priv *priv, pr_info("\tRX Queue %u rings\n", queue); - if (priv->extend_desc) { - head_rx = (void *)rx_q->dma_erx; + head_rx = stmmac_get_rx_desc(priv, rx_q, 0); + if (priv->extend_desc) desc_size = sizeof(struct dma_extended_desc); - } else { - head_rx = (void *)rx_q->dma_rx; + else desc_size = sizeof(struct dma_desc); - } /* Display RX ring */ stmmac_display_ring(priv, head_rx, dma_conf->dma_rx_size, true, @@ -1519,10 +1527,7 @@ static void stmmac_clear_rx_descriptors(struct stmmac_priv *priv, /* Clear the RX descriptors */ for (i = 0; i < dma_conf->dma_rx_size; i++) { - if (priv->extend_desc) - desc = &rx_q->dma_erx[i].basic; - else - desc = &rx_q->dma_rx[i]; + desc = stmmac_get_rx_desc(priv, rx_q, i); stmmac_init_rx_desc(priv, desc, priv->use_riwt, priv->mode, (i == dma_conf->dma_rx_size - 1), @@ -1731,10 +1736,7 @@ static int stmmac_alloc_rx_buffers(struct stmmac_priv *priv, struct dma_desc *p; int ret; - if (priv->extend_desc) - p = &((rx_q->dma_erx + i)->basic); - else - p = rx_q->dma_rx + i; + p = stmmac_get_rx_desc(priv, rx_q, i); ret = stmmac_init_rx_buffers(priv, dma_conf, p, i, flags, queue); @@ -1789,10 +1791,7 @@ static int stmmac_alloc_rx_buffers_zc(struct stmmac_priv *priv, dma_addr_t dma_addr; struct dma_desc *p; - if (priv->extend_desc) - p = (struct dma_desc *)(rx_q->dma_erx + i); - else - p = rx_q->dma_rx + i; + p = stmmac_get_rx_desc(priv, rx_q, i); buf = &rx_q->buf_pool[i]; @@ -4954,10 +4953,7 @@ static inline void stmmac_rx_refill(struct stmmac_priv *priv, u32 queue) struct dma_desc *p; bool use_rx_wd; - if (priv->extend_desc) - p = (struct dma_desc *)(rx_q->dma_erx + entry); - else - p = rx_q->dma_rx + entry; + p = stmmac_get_rx_desc(priv, rx_q, entry); if (!buf->page) { buf->page = page_pool_alloc_pages(rx_q->page_pool, gfp); @@ -5355,10 +5351,7 @@ static bool stmmac_rx_refill_zc(struct stmmac_priv *priv, u32 queue, u32 budget) } } - if (priv->extend_desc) - rx_desc = (struct dma_desc *)(rx_q->dma_erx + entry); - else - rx_desc = rx_q->dma_rx + entry; + rx_desc = stmmac_get_rx_desc(priv, rx_q, entry); dma_addr = xsk_buff_xdp_get_dma(buf->xdp); stmmac_set_desc_addr(priv, rx_desc, dma_addr); @@ -5416,14 +5409,12 @@ static int stmmac_rx_zc(struct stmmac_priv *priv, int limit, u32 queue) int status = 0; if (netif_msg_rx_status(priv)) { - void *rx_head; + void *rx_head = stmmac_get_rx_desc(priv, rx_q, 0); netdev_dbg(priv->dev, "%s: descriptor ring:\n", __func__); if (priv->extend_desc) { - rx_head = (void *)rx_q->dma_erx; desc_size = sizeof(struct dma_extended_desc); } else { - rx_head = (void *)rx_q->dma_rx; desc_size = sizeof(struct dma_desc); } @@ -5461,10 +5452,7 @@ static int stmmac_rx_zc(struct stmmac_priv *priv, int limit, u32 queue) dirty = 0; } - if (priv->extend_desc) - p = (struct dma_desc *)(rx_q->dma_erx + entry); - else - p = rx_q->dma_rx + entry; + p = stmmac_get_rx_desc(priv, rx_q, entry); /* read the status of the incoming frame */ status = stmmac_rx_status(priv, &priv->xstats, p); @@ -5477,10 +5465,7 @@ static int stmmac_rx_zc(struct stmmac_priv *priv, int limit, u32 queue) priv->dma_conf.dma_rx_size); next_entry = rx_q->cur_rx; - if (priv->extend_desc) - np = (struct dma_desc *)(rx_q->dma_erx + next_entry); - else - np = rx_q->dma_rx + next_entry; + np = stmmac_get_rx_desc(priv, rx_q, next_entry); prefetch(np); @@ -5616,16 +5601,13 @@ static int stmmac_rx(struct stmmac_priv *priv, int limit, u32 queue) limit = min(priv->dma_conf.dma_rx_size - 1, (unsigned int)limit); if (netif_msg_rx_status(priv)) { - void *rx_head; + void *rx_head = stmmac_get_rx_desc(priv, rx_q, 0); netdev_dbg(priv->dev, "%s: descriptor ring:\n", __func__); - if (priv->extend_desc) { - rx_head = (void *)rx_q->dma_erx; + if (priv->extend_desc) desc_size = sizeof(struct dma_extended_desc); - } else { - rx_head = (void *)rx_q->dma_rx; + else desc_size = sizeof(struct dma_desc); - } stmmac_display_ring(priv, rx_head, priv->dma_conf.dma_rx_size, true, rx_q->dma_rx_phy, desc_size); @@ -5658,10 +5640,7 @@ static int stmmac_rx(struct stmmac_priv *priv, int limit, u32 queue) entry = next_entry; buf = &rx_q->buf_pool[entry]; - if (priv->extend_desc) - p = (struct dma_desc *)(rx_q->dma_erx + entry); - else - p = rx_q->dma_rx + entry; + p = stmmac_get_rx_desc(priv, rx_q, entry); /* read the status of the incoming frame */ status = stmmac_rx_status(priv, &priv->xstats, p); @@ -5673,10 +5652,7 @@ static int stmmac_rx(struct stmmac_priv *priv, int limit, u32 queue) priv->dma_conf.dma_rx_size); next_entry = rx_q->cur_rx; - if (priv->extend_desc) - np = (struct dma_desc *)(rx_q->dma_erx + next_entry); - else - np = rx_q->dma_rx + next_entry; + np = stmmac_get_rx_desc(priv, rx_q, next_entry); prefetch(np); -- 2.47.3