From patchwork Fri Jun 7 08:43:11 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Justin Lai X-Patchwork-Id: 13689496 X-Patchwork-Delegate: kuba@kernel.org Received: from rtits2.realtek.com.tw (rtits2.realtek.com [211.75.126.72]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 07719405F8; Fri, 7 Jun 2024 08:46:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=211.75.126.72 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717749994; cv=none; b=PjWr4NROvW61KuL7FRoqBjlfjrW1Tq4sEVtN/PuJC0EP25xzjebLgWXyrzlwI+IlCgtsNc7HRULT/yOHj/jGHPzzGqIwowoyeVT5lRisiajbRzw1vIQVBoolcIIdrCyVO7Z1eRGkwlfB+1rqyaCxz7vMRvMK+ddZWo2uvfLAFxk= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717749994; c=relaxed/simple; bh=RkoxeDs0BfHXdYBL6o220lGNyfSDAdZpkZOtWdQb+QM=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=SHnSPnookXuAy2WSgv1C7cwiuOVPcobtyJhW+FGYeHLA11DZhg7g6naQeoJErejnuWjvh8Qff3XPKydexOe6eCCJCkLzTx1lNTqsRtzmleEXOKMors1ehA+il/Oo+dUtD3VSqlS/ER4EQonJCmSMuOSmwmhPZdVSDLGgWxQyscs= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=realtek.com; spf=pass smtp.mailfrom=realtek.com; arc=none smtp.client-ip=211.75.126.72 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=realtek.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=realtek.com X-SpamFilter-By: ArmorX SpamTrap 5.78 with qID 4578k9LL13816826, This message is accepted by code: ctloc85258 Received: from mail.realtek.com (rtexh36506.realtek.com.tw[172.21.6.27]) by rtits2.realtek.com.tw (8.15.2/2.95/5.92) with ESMTPS id 4578k9LL13816826 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 7 Jun 2024 16:46:09 +0800 Received: from RTEXMBS04.realtek.com.tw (172.21.6.97) by RTEXH36506.realtek.com.tw (172.21.6.27) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.2507.39; Fri, 7 Jun 2024 16:46:09 +0800 Received: from RTDOMAIN (172.21.210.98) by RTEXMBS04.realtek.com.tw (172.21.6.97) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.2507.35; Fri, 7 Jun 2024 16:46:08 +0800 From: Justin Lai To: CC: , , , , , , , , , , , Justin Lai Subject: [PATCH net-next v20 03/13] rtase: Implement the rtase_down function Date: Fri, 7 Jun 2024 16:43:11 +0800 Message-ID: <20240607084321.7254-4-justinlai0215@realtek.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240607084321.7254-1-justinlai0215@realtek.com> References: <20240607084321.7254-1-justinlai0215@realtek.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: RTEXH36505.realtek.com.tw (172.21.6.25) To RTEXMBS04.realtek.com.tw (172.21.6.97) X-Patchwork-Delegate: kuba@kernel.org Implement the rtase_down function to disable hardware setting and interrupt and clear descriptor ring. Signed-off-by: Justin Lai --- .../net/ethernet/realtek/rtase/rtase_main.c | 152 ++++++++++++++++++ 1 file changed, 152 insertions(+) diff --git a/drivers/net/ethernet/realtek/rtase/rtase_main.c b/drivers/net/ethernet/realtek/rtase/rtase_main.c index 80ee963971c0..caff2cfe78c7 100644 --- a/drivers/net/ethernet/realtek/rtase/rtase_main.c +++ b/drivers/net/ethernet/realtek/rtase/rtase_main.c @@ -194,6 +194,57 @@ static void rtase_free_desc(struct rtase_private *tp) } } +static void rtase_unmap_tx_skb(struct pci_dev *pdev, u32 len, + struct rtase_tx_desc *desc) +{ + dma_unmap_single(&pdev->dev, le64_to_cpu(desc->addr), len, + DMA_TO_DEVICE); + desc->opts1 = cpu_to_le32(RTK_OPTS1_DEBUG_VALUE); + desc->opts2 = 0x00; + desc->addr = cpu_to_le64(RTK_MAGIC_NUMBER); +} + +static void rtase_tx_clear_range(struct rtase_ring *ring, u32 start, u32 n) +{ + const struct rtase_private *tp = ring->ivec->tp; + struct rtase_tx_desc *desc_base = ring->desc; + struct net_device *dev = tp->dev; + u32 i; + + for (i = 0; i < n; i++) { + u32 entry = (start + i) % RTASE_NUM_DESC; + struct rtase_tx_desc *desc = desc_base + entry; + u32 len = ring->mis.len[entry]; + struct sk_buff *skb; + + if (len == 0) + continue; + + rtase_unmap_tx_skb(tp->pdev, len, desc); + ring->mis.len[entry] = 0; + skb = ring->skbuff[entry]; + if (!skb) + continue; + + dev->stats.tx_dropped++; + dev_kfree_skb_any(skb); + ring->skbuff[entry] = NULL; + } +} + +static void rtase_tx_clear(struct rtase_private *tp) +{ + struct rtase_ring *ring; + u16 i; + + for (i = 0; i < tp->func_tx_queue_num; i++) { + ring = &tp->tx_ring[i]; + rtase_tx_clear_range(ring, ring->dirty_idx, RTASE_NUM_DESC); + ring->cur_idx = 0; + ring->dirty_idx = 0; + } +} + static void rtase_mark_to_asic(union rtase_rx_desc *desc, u32 rx_buf_sz) { u32 eor = le32_to_cpu(desc->desc_cmd.opts1) & RTASE_RING_END; @@ -430,6 +481,80 @@ static void rtase_tally_counter_clear(const struct rtase_private *tp) rtase_w32(tp, RTASE_DTCCR0, cmd | RTASE_COUNTER_RESET); } +static void rtase_irq_dis_and_clear(const struct rtase_private *tp) +{ + const struct rtase_int_vector *ivec = &tp->int_vector[0]; + u32 val1; + u16 val2; + u8 i; + + rtase_w32(tp, ivec->imr_addr, 0); + val1 = rtase_r32(tp, ivec->isr_addr); + rtase_w32(tp, ivec->isr_addr, val1); + + for (i = 1; i < tp->int_nums; i++) { + ivec = &tp->int_vector[i]; + rtase_w16(tp, ivec->imr_addr, 0); + val2 = rtase_r16(tp, ivec->isr_addr); + rtase_w16(tp, ivec->isr_addr, val2); + } +} + +static void rtase_poll_timeout(const struct rtase_private *tp, u32 cond, + u32 sleep_us, u64 timeout_us, u16 reg) +{ + int err; + u8 val; + + err = read_poll_timeout(rtase_r8, val, val & cond, sleep_us, + timeout_us, false, tp, reg); + + if (err == -ETIMEDOUT) + netdev_err(tp->dev, "poll reg 0x00%x timeout\n", reg); +} + +static void rtase_nic_reset(const struct net_device *dev) +{ + const struct rtase_private *tp = netdev_priv(dev); + u16 rx_config; + u8 val; + + rx_config = rtase_r16(tp, RTASE_RX_CONFIG_0); + rtase_w16(tp, RTASE_RX_CONFIG_0, rx_config & ~RTASE_ACCEPT_MASK); + + val = rtase_r8(tp, RTASE_MISC); + rtase_w8(tp, RTASE_MISC, val | RTASE_RX_DV_GATE_EN); + + val = rtase_r8(tp, RTASE_CHIP_CMD); + rtase_w8(tp, RTASE_CHIP_CMD, val | RTASE_STOP_REQ); + mdelay(2); + + rtase_poll_timeout(tp, RTASE_STOP_REQ_DONE, 100, 150000, + RTASE_CHIP_CMD); + + rtase_poll_timeout(tp, RTASE_TX_FIFO_EMPTY, 100, 100000, + RTASE_FIFOR); + + rtase_poll_timeout(tp, RTASE_RX_FIFO_EMPTY, 100, 100000, + RTASE_FIFOR); + + val = rtase_r8(tp, RTASE_CHIP_CMD); + rtase_w8(tp, RTASE_CHIP_CMD, val & ~(RTASE_TE | RTASE_RE)); + val = rtase_r8(tp, RTASE_CHIP_CMD); + rtase_w8(tp, RTASE_CHIP_CMD, val & ~RTASE_STOP_REQ); + + rtase_w16(tp, RTASE_RX_CONFIG_0, rx_config); +} + +static void rtase_hw_reset(const struct net_device *dev) +{ + const struct rtase_private *tp = netdev_priv(dev); + + rtase_irq_dis_and_clear(tp); + + rtase_nic_reset(dev); +} + static void rtase_nic_enable(const struct net_device *dev) { const struct rtase_private *tp = netdev_priv(dev); @@ -533,6 +658,33 @@ static int rtase_open(struct net_device *dev) return ret; } +static void rtase_down(struct net_device *dev) +{ + struct rtase_private *tp = netdev_priv(dev); + struct rtase_int_vector *ivec; + struct rtase_ring *ring, *tmp; + u32 i; + + for (i = 0; i < tp->int_nums; i++) { + ivec = &tp->int_vector[i]; + napi_disable(&ivec->napi); + list_for_each_entry_safe(ring, tmp, &ivec->ring_list, + ring_entry) { + list_del(&ring->ring_entry); + } + } + + netif_tx_disable(dev); + + netif_carrier_off(dev); + + rtase_hw_reset(dev); + + rtase_tx_clear(tp); + + rtase_rx_clear(tp); +} + static int rtase_close(struct net_device *dev) { struct rtase_private *tp = netdev_priv(dev);