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![Jie Deng](/assets/img/avatar_default.png)
It is necessary to provide ethtool support for displaying and modifying parameters of dwc-xlgmac. Signed-off-by: Jie Deng <jiedeng@synopsys.com> Signed-off-by: David S. Miller <davem@davemloft.net>
1350 lines
34 KiB
C
1350 lines
34 KiB
C
/* Synopsys DesignWare Core Enterprise Ethernet (XLGMAC) Driver
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*
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* Copyright (c) 2017 Synopsys, Inc. (www.synopsys.com)
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*
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* This program is dual-licensed; you may select either version 2 of
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* the GNU General Public License ("GPL") or BSD license ("BSD").
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*
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* This Synopsys DWC XLGMAC software driver and associated documentation
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* (hereinafter the "Software") is an unsupported proprietary work of
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* Synopsys, Inc. unless otherwise expressly agreed to in writing between
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* Synopsys and you. The Software IS NOT an item of Licensed Software or a
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* Licensed Product under any End User Software License Agreement or
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* Agreement for Licensed Products with Synopsys or any supplement thereto.
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* Synopsys is a registered trademark of Synopsys, Inc. Other names included
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* in the SOFTWARE may be the trademarks of their respective owners.
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*/
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#include <linux/netdevice.h>
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#include <linux/tcp.h>
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#include "dwc-xlgmac.h"
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#include "dwc-xlgmac-reg.h"
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static int xlgmac_one_poll(struct napi_struct *, int);
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static int xlgmac_all_poll(struct napi_struct *, int);
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static inline unsigned int xlgmac_tx_avail_desc(struct xlgmac_ring *ring)
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{
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return (ring->dma_desc_count - (ring->cur - ring->dirty));
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}
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static inline unsigned int xlgmac_rx_dirty_desc(struct xlgmac_ring *ring)
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{
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return (ring->cur - ring->dirty);
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}
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static int xlgmac_maybe_stop_tx_queue(
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struct xlgmac_channel *channel,
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struct xlgmac_ring *ring,
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unsigned int count)
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{
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struct xlgmac_pdata *pdata = channel->pdata;
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if (count > xlgmac_tx_avail_desc(ring)) {
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netif_info(pdata, drv, pdata->netdev,
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"Tx queue stopped, not enough descriptors available\n");
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netif_stop_subqueue(pdata->netdev, channel->queue_index);
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ring->tx.queue_stopped = 1;
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/* If we haven't notified the hardware because of xmit_more
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* support, tell it now
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*/
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if (ring->tx.xmit_more)
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pdata->hw_ops.tx_start_xmit(channel, ring);
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return NETDEV_TX_BUSY;
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}
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return 0;
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}
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static void xlgmac_prep_vlan(struct sk_buff *skb,
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struct xlgmac_pkt_info *pkt_info)
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{
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if (skb_vlan_tag_present(skb))
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pkt_info->vlan_ctag = skb_vlan_tag_get(skb);
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}
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static int xlgmac_prep_tso(struct sk_buff *skb,
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struct xlgmac_pkt_info *pkt_info)
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{
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int ret;
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if (!XLGMAC_GET_REG_BITS(pkt_info->attributes,
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TX_PACKET_ATTRIBUTES_TSO_ENABLE_POS,
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TX_PACKET_ATTRIBUTES_TSO_ENABLE_LEN))
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return 0;
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ret = skb_cow_head(skb, 0);
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if (ret)
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return ret;
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pkt_info->header_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
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pkt_info->tcp_header_len = tcp_hdrlen(skb);
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pkt_info->tcp_payload_len = skb->len - pkt_info->header_len;
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pkt_info->mss = skb_shinfo(skb)->gso_size;
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XLGMAC_PR("header_len=%u\n", pkt_info->header_len);
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XLGMAC_PR("tcp_header_len=%u, tcp_payload_len=%u\n",
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pkt_info->tcp_header_len, pkt_info->tcp_payload_len);
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XLGMAC_PR("mss=%u\n", pkt_info->mss);
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/* Update the number of packets that will ultimately be transmitted
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* along with the extra bytes for each extra packet
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*/
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pkt_info->tx_packets = skb_shinfo(skb)->gso_segs;
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pkt_info->tx_bytes += (pkt_info->tx_packets - 1) * pkt_info->header_len;
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return 0;
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}
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static int xlgmac_is_tso(struct sk_buff *skb)
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{
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if (skb->ip_summed != CHECKSUM_PARTIAL)
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return 0;
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if (!skb_is_gso(skb))
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return 0;
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return 1;
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}
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static void xlgmac_prep_tx_pkt(struct xlgmac_pdata *pdata,
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struct xlgmac_ring *ring,
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struct sk_buff *skb,
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struct xlgmac_pkt_info *pkt_info)
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{
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struct skb_frag_struct *frag;
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unsigned int context_desc;
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unsigned int len;
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unsigned int i;
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pkt_info->skb = skb;
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context_desc = 0;
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pkt_info->desc_count = 0;
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pkt_info->tx_packets = 1;
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pkt_info->tx_bytes = skb->len;
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if (xlgmac_is_tso(skb)) {
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/* TSO requires an extra descriptor if mss is different */
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if (skb_shinfo(skb)->gso_size != ring->tx.cur_mss) {
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context_desc = 1;
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pkt_info->desc_count++;
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}
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/* TSO requires an extra descriptor for TSO header */
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pkt_info->desc_count++;
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pkt_info->attributes = XLGMAC_SET_REG_BITS(
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pkt_info->attributes,
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TX_PACKET_ATTRIBUTES_TSO_ENABLE_POS,
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TX_PACKET_ATTRIBUTES_TSO_ENABLE_LEN,
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1);
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pkt_info->attributes = XLGMAC_SET_REG_BITS(
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pkt_info->attributes,
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TX_PACKET_ATTRIBUTES_CSUM_ENABLE_POS,
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TX_PACKET_ATTRIBUTES_CSUM_ENABLE_LEN,
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1);
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} else if (skb->ip_summed == CHECKSUM_PARTIAL)
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pkt_info->attributes = XLGMAC_SET_REG_BITS(
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pkt_info->attributes,
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TX_PACKET_ATTRIBUTES_CSUM_ENABLE_POS,
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TX_PACKET_ATTRIBUTES_CSUM_ENABLE_LEN,
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1);
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if (skb_vlan_tag_present(skb)) {
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/* VLAN requires an extra descriptor if tag is different */
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if (skb_vlan_tag_get(skb) != ring->tx.cur_vlan_ctag)
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/* We can share with the TSO context descriptor */
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if (!context_desc) {
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context_desc = 1;
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pkt_info->desc_count++;
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}
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pkt_info->attributes = XLGMAC_SET_REG_BITS(
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pkt_info->attributes,
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TX_PACKET_ATTRIBUTES_VLAN_CTAG_POS,
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TX_PACKET_ATTRIBUTES_VLAN_CTAG_LEN,
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1);
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}
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for (len = skb_headlen(skb); len;) {
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pkt_info->desc_count++;
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len -= min_t(unsigned int, len, XLGMAC_TX_MAX_BUF_SIZE);
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}
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for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
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frag = &skb_shinfo(skb)->frags[i];
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for (len = skb_frag_size(frag); len; ) {
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pkt_info->desc_count++;
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len -= min_t(unsigned int, len, XLGMAC_TX_MAX_BUF_SIZE);
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}
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}
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}
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static int xlgmac_calc_rx_buf_size(struct net_device *netdev, unsigned int mtu)
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{
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unsigned int rx_buf_size;
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if (mtu > XLGMAC_JUMBO_PACKET_MTU) {
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netdev_alert(netdev, "MTU exceeds maximum supported value\n");
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return -EINVAL;
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}
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rx_buf_size = mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
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rx_buf_size = clamp_val(rx_buf_size, XLGMAC_RX_MIN_BUF_SIZE, PAGE_SIZE);
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rx_buf_size = (rx_buf_size + XLGMAC_RX_BUF_ALIGN - 1) &
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~(XLGMAC_RX_BUF_ALIGN - 1);
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return rx_buf_size;
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}
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static void xlgmac_enable_rx_tx_ints(struct xlgmac_pdata *pdata)
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{
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struct xlgmac_hw_ops *hw_ops = &pdata->hw_ops;
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struct xlgmac_channel *channel;
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enum xlgmac_int int_id;
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unsigned int i;
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channel = pdata->channel_head;
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for (i = 0; i < pdata->channel_count; i++, channel++) {
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if (channel->tx_ring && channel->rx_ring)
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int_id = XLGMAC_INT_DMA_CH_SR_TI_RI;
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else if (channel->tx_ring)
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int_id = XLGMAC_INT_DMA_CH_SR_TI;
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else if (channel->rx_ring)
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int_id = XLGMAC_INT_DMA_CH_SR_RI;
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else
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continue;
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hw_ops->enable_int(channel, int_id);
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}
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}
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static void xlgmac_disable_rx_tx_ints(struct xlgmac_pdata *pdata)
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{
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struct xlgmac_hw_ops *hw_ops = &pdata->hw_ops;
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struct xlgmac_channel *channel;
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enum xlgmac_int int_id;
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unsigned int i;
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channel = pdata->channel_head;
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for (i = 0; i < pdata->channel_count; i++, channel++) {
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if (channel->tx_ring && channel->rx_ring)
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int_id = XLGMAC_INT_DMA_CH_SR_TI_RI;
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else if (channel->tx_ring)
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int_id = XLGMAC_INT_DMA_CH_SR_TI;
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else if (channel->rx_ring)
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int_id = XLGMAC_INT_DMA_CH_SR_RI;
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else
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continue;
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hw_ops->disable_int(channel, int_id);
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}
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}
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static irqreturn_t xlgmac_isr(int irq, void *data)
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{
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unsigned int dma_isr, dma_ch_isr, mac_isr;
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struct xlgmac_pdata *pdata = data;
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struct xlgmac_channel *channel;
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struct xlgmac_hw_ops *hw_ops;
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unsigned int i, ti, ri;
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hw_ops = &pdata->hw_ops;
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/* The DMA interrupt status register also reports MAC and MTL
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* interrupts. So for polling mode, we just need to check for
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* this register to be non-zero
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*/
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dma_isr = readl(pdata->mac_regs + DMA_ISR);
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if (!dma_isr)
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return IRQ_HANDLED;
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netif_dbg(pdata, intr, pdata->netdev, "DMA_ISR=%#010x\n", dma_isr);
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for (i = 0; i < pdata->channel_count; i++) {
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if (!(dma_isr & (1 << i)))
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continue;
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channel = pdata->channel_head + i;
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dma_ch_isr = readl(XLGMAC_DMA_REG(channel, DMA_CH_SR));
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netif_dbg(pdata, intr, pdata->netdev, "DMA_CH%u_ISR=%#010x\n",
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i, dma_ch_isr);
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/* The TI or RI interrupt bits may still be set even if using
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* per channel DMA interrupts. Check to be sure those are not
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* enabled before using the private data napi structure.
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*/
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ti = XLGMAC_GET_REG_BITS(dma_ch_isr, DMA_CH_SR_TI_POS,
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DMA_CH_SR_TI_LEN);
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ri = XLGMAC_GET_REG_BITS(dma_ch_isr, DMA_CH_SR_RI_POS,
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DMA_CH_SR_RI_LEN);
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if (!pdata->per_channel_irq && (ti || ri)) {
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if (napi_schedule_prep(&pdata->napi)) {
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/* Disable Tx and Rx interrupts */
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xlgmac_disable_rx_tx_ints(pdata);
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pdata->stats.napi_poll_isr++;
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/* Turn on polling */
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__napi_schedule_irqoff(&pdata->napi);
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}
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}
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if (XLGMAC_GET_REG_BITS(dma_ch_isr, DMA_CH_SR_TPS_POS,
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DMA_CH_SR_TPS_LEN))
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pdata->stats.tx_process_stopped++;
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if (XLGMAC_GET_REG_BITS(dma_ch_isr, DMA_CH_SR_RPS_POS,
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DMA_CH_SR_RPS_LEN))
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pdata->stats.rx_process_stopped++;
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if (XLGMAC_GET_REG_BITS(dma_ch_isr, DMA_CH_SR_TBU_POS,
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DMA_CH_SR_TBU_LEN))
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pdata->stats.tx_buffer_unavailable++;
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if (XLGMAC_GET_REG_BITS(dma_ch_isr, DMA_CH_SR_RBU_POS,
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DMA_CH_SR_RBU_LEN))
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pdata->stats.rx_buffer_unavailable++;
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/* Restart the device on a Fatal Bus Error */
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if (XLGMAC_GET_REG_BITS(dma_ch_isr, DMA_CH_SR_FBE_POS,
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DMA_CH_SR_FBE_LEN)) {
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pdata->stats.fatal_bus_error++;
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schedule_work(&pdata->restart_work);
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}
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/* Clear all interrupt signals */
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writel(dma_ch_isr, XLGMAC_DMA_REG(channel, DMA_CH_SR));
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}
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if (XLGMAC_GET_REG_BITS(dma_isr, DMA_ISR_MACIS_POS,
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DMA_ISR_MACIS_LEN)) {
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mac_isr = readl(pdata->mac_regs + MAC_ISR);
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if (XLGMAC_GET_REG_BITS(mac_isr, MAC_ISR_MMCTXIS_POS,
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MAC_ISR_MMCTXIS_LEN))
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hw_ops->tx_mmc_int(pdata);
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if (XLGMAC_GET_REG_BITS(mac_isr, MAC_ISR_MMCRXIS_POS,
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MAC_ISR_MMCRXIS_LEN))
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hw_ops->rx_mmc_int(pdata);
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}
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return IRQ_HANDLED;
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}
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static irqreturn_t xlgmac_dma_isr(int irq, void *data)
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{
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struct xlgmac_channel *channel = data;
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/* Per channel DMA interrupts are enabled, so we use the per
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* channel napi structure and not the private data napi structure
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*/
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if (napi_schedule_prep(&channel->napi)) {
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/* Disable Tx and Rx interrupts */
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disable_irq_nosync(channel->dma_irq);
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/* Turn on polling */
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__napi_schedule_irqoff(&channel->napi);
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}
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return IRQ_HANDLED;
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}
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static void xlgmac_tx_timer(unsigned long data)
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{
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struct xlgmac_channel *channel = (struct xlgmac_channel *)data;
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struct xlgmac_pdata *pdata = channel->pdata;
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struct napi_struct *napi;
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napi = (pdata->per_channel_irq) ? &channel->napi : &pdata->napi;
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if (napi_schedule_prep(napi)) {
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/* Disable Tx and Rx interrupts */
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if (pdata->per_channel_irq)
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disable_irq_nosync(channel->dma_irq);
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else
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xlgmac_disable_rx_tx_ints(pdata);
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pdata->stats.napi_poll_txtimer++;
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/* Turn on polling */
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__napi_schedule(napi);
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}
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channel->tx_timer_active = 0;
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}
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static void xlgmac_init_timers(struct xlgmac_pdata *pdata)
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{
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struct xlgmac_channel *channel;
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unsigned int i;
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channel = pdata->channel_head;
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for (i = 0; i < pdata->channel_count; i++, channel++) {
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if (!channel->tx_ring)
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break;
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setup_timer(&channel->tx_timer, xlgmac_tx_timer,
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(unsigned long)channel);
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}
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}
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static void xlgmac_stop_timers(struct xlgmac_pdata *pdata)
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{
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struct xlgmac_channel *channel;
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unsigned int i;
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channel = pdata->channel_head;
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for (i = 0; i < pdata->channel_count; i++, channel++) {
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if (!channel->tx_ring)
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break;
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del_timer_sync(&channel->tx_timer);
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}
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}
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static void xlgmac_napi_enable(struct xlgmac_pdata *pdata, unsigned int add)
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{
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struct xlgmac_channel *channel;
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unsigned int i;
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if (pdata->per_channel_irq) {
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channel = pdata->channel_head;
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for (i = 0; i < pdata->channel_count; i++, channel++) {
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if (add)
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netif_napi_add(pdata->netdev, &channel->napi,
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xlgmac_one_poll,
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NAPI_POLL_WEIGHT);
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napi_enable(&channel->napi);
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}
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} else {
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if (add)
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netif_napi_add(pdata->netdev, &pdata->napi,
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xlgmac_all_poll, NAPI_POLL_WEIGHT);
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napi_enable(&pdata->napi);
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}
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}
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static void xlgmac_napi_disable(struct xlgmac_pdata *pdata, unsigned int del)
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{
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struct xlgmac_channel *channel;
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unsigned int i;
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if (pdata->per_channel_irq) {
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channel = pdata->channel_head;
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for (i = 0; i < pdata->channel_count; i++, channel++) {
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napi_disable(&channel->napi);
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if (del)
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netif_napi_del(&channel->napi);
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}
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} else {
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napi_disable(&pdata->napi);
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if (del)
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netif_napi_del(&pdata->napi);
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}
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}
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static int xlgmac_request_irqs(struct xlgmac_pdata *pdata)
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{
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struct net_device *netdev = pdata->netdev;
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struct xlgmac_channel *channel;
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unsigned int i;
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int ret;
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ret = devm_request_irq(pdata->dev, pdata->dev_irq, xlgmac_isr,
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IRQF_SHARED, netdev->name, pdata);
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if (ret) {
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netdev_alert(netdev, "error requesting irq %d\n",
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pdata->dev_irq);
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return ret;
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}
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if (!pdata->per_channel_irq)
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return 0;
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channel = pdata->channel_head;
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for (i = 0; i < pdata->channel_count; i++, channel++) {
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snprintf(channel->dma_irq_name,
|
|
sizeof(channel->dma_irq_name) - 1,
|
|
"%s-TxRx-%u", netdev_name(netdev),
|
|
channel->queue_index);
|
|
|
|
ret = devm_request_irq(pdata->dev, channel->dma_irq,
|
|
xlgmac_dma_isr, 0,
|
|
channel->dma_irq_name, channel);
|
|
if (ret) {
|
|
netdev_alert(netdev, "error requesting irq %d\n",
|
|
channel->dma_irq);
|
|
goto err_irq;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
|
|
err_irq:
|
|
/* Using an unsigned int, 'i' will go to UINT_MAX and exit */
|
|
for (i--, channel--; i < pdata->channel_count; i--, channel--)
|
|
devm_free_irq(pdata->dev, channel->dma_irq, channel);
|
|
|
|
devm_free_irq(pdata->dev, pdata->dev_irq, pdata);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void xlgmac_free_irqs(struct xlgmac_pdata *pdata)
|
|
{
|
|
struct xlgmac_channel *channel;
|
|
unsigned int i;
|
|
|
|
devm_free_irq(pdata->dev, pdata->dev_irq, pdata);
|
|
|
|
if (!pdata->per_channel_irq)
|
|
return;
|
|
|
|
channel = pdata->channel_head;
|
|
for (i = 0; i < pdata->channel_count; i++, channel++)
|
|
devm_free_irq(pdata->dev, channel->dma_irq, channel);
|
|
}
|
|
|
|
static void xlgmac_free_tx_data(struct xlgmac_pdata *pdata)
|
|
{
|
|
struct xlgmac_desc_ops *desc_ops = &pdata->desc_ops;
|
|
struct xlgmac_desc_data *desc_data;
|
|
struct xlgmac_channel *channel;
|
|
struct xlgmac_ring *ring;
|
|
unsigned int i, j;
|
|
|
|
channel = pdata->channel_head;
|
|
for (i = 0; i < pdata->channel_count; i++, channel++) {
|
|
ring = channel->tx_ring;
|
|
if (!ring)
|
|
break;
|
|
|
|
for (j = 0; j < ring->dma_desc_count; j++) {
|
|
desc_data = XLGMAC_GET_DESC_DATA(ring, j);
|
|
desc_ops->unmap_desc_data(pdata, desc_data);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void xlgmac_free_rx_data(struct xlgmac_pdata *pdata)
|
|
{
|
|
struct xlgmac_desc_ops *desc_ops = &pdata->desc_ops;
|
|
struct xlgmac_desc_data *desc_data;
|
|
struct xlgmac_channel *channel;
|
|
struct xlgmac_ring *ring;
|
|
unsigned int i, j;
|
|
|
|
channel = pdata->channel_head;
|
|
for (i = 0; i < pdata->channel_count; i++, channel++) {
|
|
ring = channel->rx_ring;
|
|
if (!ring)
|
|
break;
|
|
|
|
for (j = 0; j < ring->dma_desc_count; j++) {
|
|
desc_data = XLGMAC_GET_DESC_DATA(ring, j);
|
|
desc_ops->unmap_desc_data(pdata, desc_data);
|
|
}
|
|
}
|
|
}
|
|
|
|
static int xlgmac_start(struct xlgmac_pdata *pdata)
|
|
{
|
|
struct xlgmac_hw_ops *hw_ops = &pdata->hw_ops;
|
|
struct net_device *netdev = pdata->netdev;
|
|
int ret;
|
|
|
|
hw_ops->init(pdata);
|
|
xlgmac_napi_enable(pdata, 1);
|
|
|
|
ret = xlgmac_request_irqs(pdata);
|
|
if (ret)
|
|
goto err_napi;
|
|
|
|
hw_ops->enable_tx(pdata);
|
|
hw_ops->enable_rx(pdata);
|
|
netif_tx_start_all_queues(netdev);
|
|
|
|
return 0;
|
|
|
|
err_napi:
|
|
xlgmac_napi_disable(pdata, 1);
|
|
hw_ops->exit(pdata);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void xlgmac_stop(struct xlgmac_pdata *pdata)
|
|
{
|
|
struct xlgmac_hw_ops *hw_ops = &pdata->hw_ops;
|
|
struct net_device *netdev = pdata->netdev;
|
|
struct xlgmac_channel *channel;
|
|
struct netdev_queue *txq;
|
|
unsigned int i;
|
|
|
|
netif_tx_stop_all_queues(netdev);
|
|
xlgmac_stop_timers(pdata);
|
|
hw_ops->disable_tx(pdata);
|
|
hw_ops->disable_rx(pdata);
|
|
xlgmac_free_irqs(pdata);
|
|
xlgmac_napi_disable(pdata, 1);
|
|
hw_ops->exit(pdata);
|
|
|
|
channel = pdata->channel_head;
|
|
for (i = 0; i < pdata->channel_count; i++, channel++) {
|
|
if (!channel->tx_ring)
|
|
continue;
|
|
|
|
txq = netdev_get_tx_queue(netdev, channel->queue_index);
|
|
netdev_tx_reset_queue(txq);
|
|
}
|
|
}
|
|
|
|
static void xlgmac_restart_dev(struct xlgmac_pdata *pdata)
|
|
{
|
|
/* If not running, "restart" will happen on open */
|
|
if (!netif_running(pdata->netdev))
|
|
return;
|
|
|
|
xlgmac_stop(pdata);
|
|
|
|
xlgmac_free_tx_data(pdata);
|
|
xlgmac_free_rx_data(pdata);
|
|
|
|
xlgmac_start(pdata);
|
|
}
|
|
|
|
static void xlgmac_restart(struct work_struct *work)
|
|
{
|
|
struct xlgmac_pdata *pdata = container_of(work,
|
|
struct xlgmac_pdata,
|
|
restart_work);
|
|
|
|
rtnl_lock();
|
|
|
|
xlgmac_restart_dev(pdata);
|
|
|
|
rtnl_unlock();
|
|
}
|
|
|
|
static int xlgmac_open(struct net_device *netdev)
|
|
{
|
|
struct xlgmac_pdata *pdata = netdev_priv(netdev);
|
|
struct xlgmac_desc_ops *desc_ops;
|
|
int ret;
|
|
|
|
desc_ops = &pdata->desc_ops;
|
|
|
|
/* TODO: Initialize the phy */
|
|
|
|
/* Calculate the Rx buffer size before allocating rings */
|
|
ret = xlgmac_calc_rx_buf_size(netdev, netdev->mtu);
|
|
if (ret < 0)
|
|
return ret;
|
|
pdata->rx_buf_size = ret;
|
|
|
|
/* Allocate the channels and rings */
|
|
ret = desc_ops->alloc_channles_and_rings(pdata);
|
|
if (ret)
|
|
return ret;
|
|
|
|
INIT_WORK(&pdata->restart_work, xlgmac_restart);
|
|
xlgmac_init_timers(pdata);
|
|
|
|
ret = xlgmac_start(pdata);
|
|
if (ret)
|
|
goto err_channels_and_rings;
|
|
|
|
return 0;
|
|
|
|
err_channels_and_rings:
|
|
desc_ops->free_channels_and_rings(pdata);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int xlgmac_close(struct net_device *netdev)
|
|
{
|
|
struct xlgmac_pdata *pdata = netdev_priv(netdev);
|
|
struct xlgmac_desc_ops *desc_ops;
|
|
|
|
desc_ops = &pdata->desc_ops;
|
|
|
|
/* Stop the device */
|
|
xlgmac_stop(pdata);
|
|
|
|
/* Free the channels and rings */
|
|
desc_ops->free_channels_and_rings(pdata);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void xlgmac_tx_timeout(struct net_device *netdev)
|
|
{
|
|
struct xlgmac_pdata *pdata = netdev_priv(netdev);
|
|
|
|
netdev_warn(netdev, "tx timeout, device restarting\n");
|
|
schedule_work(&pdata->restart_work);
|
|
}
|
|
|
|
static int xlgmac_xmit(struct sk_buff *skb, struct net_device *netdev)
|
|
{
|
|
struct xlgmac_pdata *pdata = netdev_priv(netdev);
|
|
struct xlgmac_pkt_info *tx_pkt_info;
|
|
struct xlgmac_desc_ops *desc_ops;
|
|
struct xlgmac_channel *channel;
|
|
struct xlgmac_hw_ops *hw_ops;
|
|
struct netdev_queue *txq;
|
|
struct xlgmac_ring *ring;
|
|
int ret;
|
|
|
|
desc_ops = &pdata->desc_ops;
|
|
hw_ops = &pdata->hw_ops;
|
|
|
|
XLGMAC_PR("skb->len = %d\n", skb->len);
|
|
|
|
channel = pdata->channel_head + skb->queue_mapping;
|
|
txq = netdev_get_tx_queue(netdev, channel->queue_index);
|
|
ring = channel->tx_ring;
|
|
tx_pkt_info = &ring->pkt_info;
|
|
|
|
if (skb->len == 0) {
|
|
netif_err(pdata, tx_err, netdev,
|
|
"empty skb received from stack\n");
|
|
dev_kfree_skb_any(skb);
|
|
return NETDEV_TX_OK;
|
|
}
|
|
|
|
/* Prepare preliminary packet info for TX */
|
|
memset(tx_pkt_info, 0, sizeof(*tx_pkt_info));
|
|
xlgmac_prep_tx_pkt(pdata, ring, skb, tx_pkt_info);
|
|
|
|
/* Check that there are enough descriptors available */
|
|
ret = xlgmac_maybe_stop_tx_queue(channel, ring,
|
|
tx_pkt_info->desc_count);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = xlgmac_prep_tso(skb, tx_pkt_info);
|
|
if (ret) {
|
|
netif_err(pdata, tx_err, netdev,
|
|
"error processing TSO packet\n");
|
|
dev_kfree_skb_any(skb);
|
|
return ret;
|
|
}
|
|
xlgmac_prep_vlan(skb, tx_pkt_info);
|
|
|
|
if (!desc_ops->map_tx_skb(channel, skb)) {
|
|
dev_kfree_skb_any(skb);
|
|
return NETDEV_TX_OK;
|
|
}
|
|
|
|
/* Report on the actual number of bytes (to be) sent */
|
|
netdev_tx_sent_queue(txq, tx_pkt_info->tx_bytes);
|
|
|
|
/* Configure required descriptor fields for transmission */
|
|
hw_ops->dev_xmit(channel);
|
|
|
|
if (netif_msg_pktdata(pdata))
|
|
xlgmac_print_pkt(netdev, skb, true);
|
|
|
|
/* Stop the queue in advance if there may not be enough descriptors */
|
|
xlgmac_maybe_stop_tx_queue(channel, ring, XLGMAC_TX_MAX_DESC_NR);
|
|
|
|
return NETDEV_TX_OK;
|
|
}
|
|
|
|
static void xlgmac_get_stats64(struct net_device *netdev,
|
|
struct rtnl_link_stats64 *s)
|
|
{
|
|
struct xlgmac_pdata *pdata = netdev_priv(netdev);
|
|
struct xlgmac_stats *pstats = &pdata->stats;
|
|
|
|
pdata->hw_ops.read_mmc_stats(pdata);
|
|
|
|
s->rx_packets = pstats->rxframecount_gb;
|
|
s->rx_bytes = pstats->rxoctetcount_gb;
|
|
s->rx_errors = pstats->rxframecount_gb -
|
|
pstats->rxbroadcastframes_g -
|
|
pstats->rxmulticastframes_g -
|
|
pstats->rxunicastframes_g;
|
|
s->multicast = pstats->rxmulticastframes_g;
|
|
s->rx_length_errors = pstats->rxlengtherror;
|
|
s->rx_crc_errors = pstats->rxcrcerror;
|
|
s->rx_fifo_errors = pstats->rxfifooverflow;
|
|
|
|
s->tx_packets = pstats->txframecount_gb;
|
|
s->tx_bytes = pstats->txoctetcount_gb;
|
|
s->tx_errors = pstats->txframecount_gb - pstats->txframecount_g;
|
|
s->tx_dropped = netdev->stats.tx_dropped;
|
|
}
|
|
|
|
static int xlgmac_set_mac_address(struct net_device *netdev, void *addr)
|
|
{
|
|
struct xlgmac_pdata *pdata = netdev_priv(netdev);
|
|
struct xlgmac_hw_ops *hw_ops = &pdata->hw_ops;
|
|
struct sockaddr *saddr = addr;
|
|
|
|
if (!is_valid_ether_addr(saddr->sa_data))
|
|
return -EADDRNOTAVAIL;
|
|
|
|
memcpy(netdev->dev_addr, saddr->sa_data, netdev->addr_len);
|
|
|
|
hw_ops->set_mac_address(pdata, netdev->dev_addr);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int xlgmac_ioctl(struct net_device *netdev,
|
|
struct ifreq *ifreq, int cmd)
|
|
{
|
|
if (!netif_running(netdev))
|
|
return -ENODEV;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int xlgmac_change_mtu(struct net_device *netdev, int mtu)
|
|
{
|
|
struct xlgmac_pdata *pdata = netdev_priv(netdev);
|
|
int ret;
|
|
|
|
ret = xlgmac_calc_rx_buf_size(netdev, mtu);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
pdata->rx_buf_size = ret;
|
|
netdev->mtu = mtu;
|
|
|
|
xlgmac_restart_dev(pdata);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int xlgmac_vlan_rx_add_vid(struct net_device *netdev,
|
|
__be16 proto,
|
|
u16 vid)
|
|
{
|
|
struct xlgmac_pdata *pdata = netdev_priv(netdev);
|
|
struct xlgmac_hw_ops *hw_ops = &pdata->hw_ops;
|
|
|
|
set_bit(vid, pdata->active_vlans);
|
|
hw_ops->update_vlan_hash_table(pdata);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int xlgmac_vlan_rx_kill_vid(struct net_device *netdev,
|
|
__be16 proto,
|
|
u16 vid)
|
|
{
|
|
struct xlgmac_pdata *pdata = netdev_priv(netdev);
|
|
struct xlgmac_hw_ops *hw_ops = &pdata->hw_ops;
|
|
|
|
clear_bit(vid, pdata->active_vlans);
|
|
hw_ops->update_vlan_hash_table(pdata);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_NET_POLL_CONTROLLER
|
|
static void xlgmac_poll_controller(struct net_device *netdev)
|
|
{
|
|
struct xlgmac_pdata *pdata = netdev_priv(netdev);
|
|
struct xlgmac_channel *channel;
|
|
unsigned int i;
|
|
|
|
if (pdata->per_channel_irq) {
|
|
channel = pdata->channel_head;
|
|
for (i = 0; i < pdata->channel_count; i++, channel++)
|
|
xlgmac_dma_isr(channel->dma_irq, channel);
|
|
} else {
|
|
disable_irq(pdata->dev_irq);
|
|
xlgmac_isr(pdata->dev_irq, pdata);
|
|
enable_irq(pdata->dev_irq);
|
|
}
|
|
}
|
|
#endif /* CONFIG_NET_POLL_CONTROLLER */
|
|
|
|
static int xlgmac_set_features(struct net_device *netdev,
|
|
netdev_features_t features)
|
|
{
|
|
netdev_features_t rxhash, rxcsum, rxvlan, rxvlan_filter;
|
|
struct xlgmac_pdata *pdata = netdev_priv(netdev);
|
|
struct xlgmac_hw_ops *hw_ops = &pdata->hw_ops;
|
|
int ret = 0;
|
|
|
|
rxhash = pdata->netdev_features & NETIF_F_RXHASH;
|
|
rxcsum = pdata->netdev_features & NETIF_F_RXCSUM;
|
|
rxvlan = pdata->netdev_features & NETIF_F_HW_VLAN_CTAG_RX;
|
|
rxvlan_filter = pdata->netdev_features & NETIF_F_HW_VLAN_CTAG_FILTER;
|
|
|
|
if ((features & NETIF_F_RXHASH) && !rxhash)
|
|
ret = hw_ops->enable_rss(pdata);
|
|
else if (!(features & NETIF_F_RXHASH) && rxhash)
|
|
ret = hw_ops->disable_rss(pdata);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if ((features & NETIF_F_RXCSUM) && !rxcsum)
|
|
hw_ops->enable_rx_csum(pdata);
|
|
else if (!(features & NETIF_F_RXCSUM) && rxcsum)
|
|
hw_ops->disable_rx_csum(pdata);
|
|
|
|
if ((features & NETIF_F_HW_VLAN_CTAG_RX) && !rxvlan)
|
|
hw_ops->enable_rx_vlan_stripping(pdata);
|
|
else if (!(features & NETIF_F_HW_VLAN_CTAG_RX) && rxvlan)
|
|
hw_ops->disable_rx_vlan_stripping(pdata);
|
|
|
|
if ((features & NETIF_F_HW_VLAN_CTAG_FILTER) && !rxvlan_filter)
|
|
hw_ops->enable_rx_vlan_filtering(pdata);
|
|
else if (!(features & NETIF_F_HW_VLAN_CTAG_FILTER) && rxvlan_filter)
|
|
hw_ops->disable_rx_vlan_filtering(pdata);
|
|
|
|
pdata->netdev_features = features;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void xlgmac_set_rx_mode(struct net_device *netdev)
|
|
{
|
|
struct xlgmac_pdata *pdata = netdev_priv(netdev);
|
|
struct xlgmac_hw_ops *hw_ops = &pdata->hw_ops;
|
|
|
|
hw_ops->config_rx_mode(pdata);
|
|
}
|
|
|
|
static const struct net_device_ops xlgmac_netdev_ops = {
|
|
.ndo_open = xlgmac_open,
|
|
.ndo_stop = xlgmac_close,
|
|
.ndo_start_xmit = xlgmac_xmit,
|
|
.ndo_tx_timeout = xlgmac_tx_timeout,
|
|
.ndo_get_stats64 = xlgmac_get_stats64,
|
|
.ndo_change_mtu = xlgmac_change_mtu,
|
|
.ndo_set_mac_address = xlgmac_set_mac_address,
|
|
.ndo_validate_addr = eth_validate_addr,
|
|
.ndo_do_ioctl = xlgmac_ioctl,
|
|
.ndo_vlan_rx_add_vid = xlgmac_vlan_rx_add_vid,
|
|
.ndo_vlan_rx_kill_vid = xlgmac_vlan_rx_kill_vid,
|
|
#ifdef CONFIG_NET_POLL_CONTROLLER
|
|
.ndo_poll_controller = xlgmac_poll_controller,
|
|
#endif
|
|
.ndo_set_features = xlgmac_set_features,
|
|
.ndo_set_rx_mode = xlgmac_set_rx_mode,
|
|
};
|
|
|
|
const struct net_device_ops *xlgmac_get_netdev_ops(void)
|
|
{
|
|
return &xlgmac_netdev_ops;
|
|
}
|
|
|
|
static void xlgmac_rx_refresh(struct xlgmac_channel *channel)
|
|
{
|
|
struct xlgmac_pdata *pdata = channel->pdata;
|
|
struct xlgmac_ring *ring = channel->rx_ring;
|
|
struct xlgmac_desc_data *desc_data;
|
|
struct xlgmac_desc_ops *desc_ops;
|
|
struct xlgmac_hw_ops *hw_ops;
|
|
|
|
desc_ops = &pdata->desc_ops;
|
|
hw_ops = &pdata->hw_ops;
|
|
|
|
while (ring->dirty != ring->cur) {
|
|
desc_data = XLGMAC_GET_DESC_DATA(ring, ring->dirty);
|
|
|
|
/* Reset desc_data values */
|
|
desc_ops->unmap_desc_data(pdata, desc_data);
|
|
|
|
if (desc_ops->map_rx_buffer(pdata, ring, desc_data))
|
|
break;
|
|
|
|
hw_ops->rx_desc_reset(pdata, desc_data, ring->dirty);
|
|
|
|
ring->dirty++;
|
|
}
|
|
|
|
/* Make sure everything is written before the register write */
|
|
wmb();
|
|
|
|
/* Update the Rx Tail Pointer Register with address of
|
|
* the last cleaned entry
|
|
*/
|
|
desc_data = XLGMAC_GET_DESC_DATA(ring, ring->dirty - 1);
|
|
writel(lower_32_bits(desc_data->dma_desc_addr),
|
|
XLGMAC_DMA_REG(channel, DMA_CH_RDTR_LO));
|
|
}
|
|
|
|
static struct sk_buff *xlgmac_create_skb(struct xlgmac_pdata *pdata,
|
|
struct napi_struct *napi,
|
|
struct xlgmac_desc_data *desc_data,
|
|
unsigned int len)
|
|
{
|
|
unsigned int copy_len;
|
|
struct sk_buff *skb;
|
|
u8 *packet;
|
|
|
|
skb = napi_alloc_skb(napi, desc_data->rx.hdr.dma_len);
|
|
if (!skb)
|
|
return NULL;
|
|
|
|
/* Start with the header buffer which may contain just the header
|
|
* or the header plus data
|
|
*/
|
|
dma_sync_single_range_for_cpu(pdata->dev, desc_data->rx.hdr.dma_base,
|
|
desc_data->rx.hdr.dma_off,
|
|
desc_data->rx.hdr.dma_len,
|
|
DMA_FROM_DEVICE);
|
|
|
|
packet = page_address(desc_data->rx.hdr.pa.pages) +
|
|
desc_data->rx.hdr.pa.pages_offset;
|
|
copy_len = (desc_data->rx.hdr_len) ? desc_data->rx.hdr_len : len;
|
|
copy_len = min(desc_data->rx.hdr.dma_len, copy_len);
|
|
skb_copy_to_linear_data(skb, packet, copy_len);
|
|
skb_put(skb, copy_len);
|
|
|
|
len -= copy_len;
|
|
if (len) {
|
|
/* Add the remaining data as a frag */
|
|
dma_sync_single_range_for_cpu(pdata->dev,
|
|
desc_data->rx.buf.dma_base,
|
|
desc_data->rx.buf.dma_off,
|
|
desc_data->rx.buf.dma_len,
|
|
DMA_FROM_DEVICE);
|
|
|
|
skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags,
|
|
desc_data->rx.buf.pa.pages,
|
|
desc_data->rx.buf.pa.pages_offset,
|
|
len, desc_data->rx.buf.dma_len);
|
|
desc_data->rx.buf.pa.pages = NULL;
|
|
}
|
|
|
|
return skb;
|
|
}
|
|
|
|
static int xlgmac_tx_poll(struct xlgmac_channel *channel)
|
|
{
|
|
struct xlgmac_pdata *pdata = channel->pdata;
|
|
struct xlgmac_ring *ring = channel->tx_ring;
|
|
struct net_device *netdev = pdata->netdev;
|
|
unsigned int tx_packets = 0, tx_bytes = 0;
|
|
struct xlgmac_desc_data *desc_data;
|
|
struct xlgmac_dma_desc *dma_desc;
|
|
struct xlgmac_desc_ops *desc_ops;
|
|
struct xlgmac_hw_ops *hw_ops;
|
|
struct netdev_queue *txq;
|
|
int processed = 0;
|
|
unsigned int cur;
|
|
|
|
desc_ops = &pdata->desc_ops;
|
|
hw_ops = &pdata->hw_ops;
|
|
|
|
/* Nothing to do if there isn't a Tx ring for this channel */
|
|
if (!ring)
|
|
return 0;
|
|
|
|
cur = ring->cur;
|
|
|
|
/* Be sure we get ring->cur before accessing descriptor data */
|
|
smp_rmb();
|
|
|
|
txq = netdev_get_tx_queue(netdev, channel->queue_index);
|
|
|
|
while ((processed < XLGMAC_TX_DESC_MAX_PROC) &&
|
|
(ring->dirty != cur)) {
|
|
desc_data = XLGMAC_GET_DESC_DATA(ring, ring->dirty);
|
|
dma_desc = desc_data->dma_desc;
|
|
|
|
if (!hw_ops->tx_complete(dma_desc))
|
|
break;
|
|
|
|
/* Make sure descriptor fields are read after reading
|
|
* the OWN bit
|
|
*/
|
|
dma_rmb();
|
|
|
|
if (netif_msg_tx_done(pdata))
|
|
xlgmac_dump_tx_desc(pdata, ring, ring->dirty, 1, 0);
|
|
|
|
if (hw_ops->is_last_desc(dma_desc)) {
|
|
tx_packets += desc_data->tx.packets;
|
|
tx_bytes += desc_data->tx.bytes;
|
|
}
|
|
|
|
/* Free the SKB and reset the descriptor for re-use */
|
|
desc_ops->unmap_desc_data(pdata, desc_data);
|
|
hw_ops->tx_desc_reset(desc_data);
|
|
|
|
processed++;
|
|
ring->dirty++;
|
|
}
|
|
|
|
if (!processed)
|
|
return 0;
|
|
|
|
netdev_tx_completed_queue(txq, tx_packets, tx_bytes);
|
|
|
|
if ((ring->tx.queue_stopped == 1) &&
|
|
(xlgmac_tx_avail_desc(ring) > XLGMAC_TX_DESC_MIN_FREE)) {
|
|
ring->tx.queue_stopped = 0;
|
|
netif_tx_wake_queue(txq);
|
|
}
|
|
|
|
XLGMAC_PR("processed=%d\n", processed);
|
|
|
|
return processed;
|
|
}
|
|
|
|
static int xlgmac_rx_poll(struct xlgmac_channel *channel, int budget)
|
|
{
|
|
struct xlgmac_pdata *pdata = channel->pdata;
|
|
struct xlgmac_ring *ring = channel->rx_ring;
|
|
struct net_device *netdev = pdata->netdev;
|
|
unsigned int len, dma_desc_len, max_len;
|
|
unsigned int context_next, context;
|
|
struct xlgmac_desc_data *desc_data;
|
|
struct xlgmac_pkt_info *pkt_info;
|
|
unsigned int incomplete, error;
|
|
struct xlgmac_hw_ops *hw_ops;
|
|
unsigned int received = 0;
|
|
struct napi_struct *napi;
|
|
struct sk_buff *skb;
|
|
int packet_count = 0;
|
|
|
|
hw_ops = &pdata->hw_ops;
|
|
|
|
/* Nothing to do if there isn't a Rx ring for this channel */
|
|
if (!ring)
|
|
return 0;
|
|
|
|
incomplete = 0;
|
|
context_next = 0;
|
|
|
|
napi = (pdata->per_channel_irq) ? &channel->napi : &pdata->napi;
|
|
|
|
desc_data = XLGMAC_GET_DESC_DATA(ring, ring->cur);
|
|
pkt_info = &ring->pkt_info;
|
|
while (packet_count < budget) {
|
|
/* First time in loop see if we need to restore state */
|
|
if (!received && desc_data->state_saved) {
|
|
skb = desc_data->state.skb;
|
|
error = desc_data->state.error;
|
|
len = desc_data->state.len;
|
|
} else {
|
|
memset(pkt_info, 0, sizeof(*pkt_info));
|
|
skb = NULL;
|
|
error = 0;
|
|
len = 0;
|
|
}
|
|
|
|
read_again:
|
|
desc_data = XLGMAC_GET_DESC_DATA(ring, ring->cur);
|
|
|
|
if (xlgmac_rx_dirty_desc(ring) > XLGMAC_RX_DESC_MAX_DIRTY)
|
|
xlgmac_rx_refresh(channel);
|
|
|
|
if (hw_ops->dev_read(channel))
|
|
break;
|
|
|
|
received++;
|
|
ring->cur++;
|
|
|
|
incomplete = XLGMAC_GET_REG_BITS(
|
|
pkt_info->attributes,
|
|
RX_PACKET_ATTRIBUTES_INCOMPLETE_POS,
|
|
RX_PACKET_ATTRIBUTES_INCOMPLETE_LEN);
|
|
context_next = XLGMAC_GET_REG_BITS(
|
|
pkt_info->attributes,
|
|
RX_PACKET_ATTRIBUTES_CONTEXT_NEXT_POS,
|
|
RX_PACKET_ATTRIBUTES_CONTEXT_NEXT_LEN);
|
|
context = XLGMAC_GET_REG_BITS(
|
|
pkt_info->attributes,
|
|
RX_PACKET_ATTRIBUTES_CONTEXT_POS,
|
|
RX_PACKET_ATTRIBUTES_CONTEXT_LEN);
|
|
|
|
/* Earlier error, just drain the remaining data */
|
|
if ((incomplete || context_next) && error)
|
|
goto read_again;
|
|
|
|
if (error || pkt_info->errors) {
|
|
if (pkt_info->errors)
|
|
netif_err(pdata, rx_err, netdev,
|
|
"error in received packet\n");
|
|
dev_kfree_skb(skb);
|
|
goto next_packet;
|
|
}
|
|
|
|
if (!context) {
|
|
/* Length is cumulative, get this descriptor's length */
|
|
dma_desc_len = desc_data->rx.len - len;
|
|
len += dma_desc_len;
|
|
|
|
if (dma_desc_len && !skb) {
|
|
skb = xlgmac_create_skb(pdata, napi, desc_data,
|
|
dma_desc_len);
|
|
if (!skb)
|
|
error = 1;
|
|
} else if (dma_desc_len) {
|
|
dma_sync_single_range_for_cpu(
|
|
pdata->dev,
|
|
desc_data->rx.buf.dma_base,
|
|
desc_data->rx.buf.dma_off,
|
|
desc_data->rx.buf.dma_len,
|
|
DMA_FROM_DEVICE);
|
|
|
|
skb_add_rx_frag(
|
|
skb, skb_shinfo(skb)->nr_frags,
|
|
desc_data->rx.buf.pa.pages,
|
|
desc_data->rx.buf.pa.pages_offset,
|
|
dma_desc_len,
|
|
desc_data->rx.buf.dma_len);
|
|
desc_data->rx.buf.pa.pages = NULL;
|
|
}
|
|
}
|
|
|
|
if (incomplete || context_next)
|
|
goto read_again;
|
|
|
|
if (!skb)
|
|
goto next_packet;
|
|
|
|
/* Be sure we don't exceed the configured MTU */
|
|
max_len = netdev->mtu + ETH_HLEN;
|
|
if (!(netdev->features & NETIF_F_HW_VLAN_CTAG_RX) &&
|
|
(skb->protocol == htons(ETH_P_8021Q)))
|
|
max_len += VLAN_HLEN;
|
|
|
|
if (skb->len > max_len) {
|
|
netif_err(pdata, rx_err, netdev,
|
|
"packet length exceeds configured MTU\n");
|
|
dev_kfree_skb(skb);
|
|
goto next_packet;
|
|
}
|
|
|
|
if (netif_msg_pktdata(pdata))
|
|
xlgmac_print_pkt(netdev, skb, false);
|
|
|
|
skb_checksum_none_assert(skb);
|
|
if (XLGMAC_GET_REG_BITS(pkt_info->attributes,
|
|
RX_PACKET_ATTRIBUTES_CSUM_DONE_POS,
|
|
RX_PACKET_ATTRIBUTES_CSUM_DONE_LEN))
|
|
skb->ip_summed = CHECKSUM_UNNECESSARY;
|
|
|
|
if (XLGMAC_GET_REG_BITS(pkt_info->attributes,
|
|
RX_PACKET_ATTRIBUTES_VLAN_CTAG_POS,
|
|
RX_PACKET_ATTRIBUTES_VLAN_CTAG_LEN)) {
|
|
__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
|
|
pkt_info->vlan_ctag);
|
|
pdata->stats.rx_vlan_packets++;
|
|
}
|
|
|
|
if (XLGMAC_GET_REG_BITS(pkt_info->attributes,
|
|
RX_PACKET_ATTRIBUTES_RSS_HASH_POS,
|
|
RX_PACKET_ATTRIBUTES_RSS_HASH_LEN))
|
|
skb_set_hash(skb, pkt_info->rss_hash,
|
|
pkt_info->rss_hash_type);
|
|
|
|
skb->dev = netdev;
|
|
skb->protocol = eth_type_trans(skb, netdev);
|
|
skb_record_rx_queue(skb, channel->queue_index);
|
|
|
|
napi_gro_receive(napi, skb);
|
|
|
|
next_packet:
|
|
packet_count++;
|
|
}
|
|
|
|
/* Check if we need to save state before leaving */
|
|
if (received && (incomplete || context_next)) {
|
|
desc_data = XLGMAC_GET_DESC_DATA(ring, ring->cur);
|
|
desc_data->state_saved = 1;
|
|
desc_data->state.skb = skb;
|
|
desc_data->state.len = len;
|
|
desc_data->state.error = error;
|
|
}
|
|
|
|
XLGMAC_PR("packet_count = %d\n", packet_count);
|
|
|
|
return packet_count;
|
|
}
|
|
|
|
static int xlgmac_one_poll(struct napi_struct *napi, int budget)
|
|
{
|
|
struct xlgmac_channel *channel = container_of(napi,
|
|
struct xlgmac_channel,
|
|
napi);
|
|
int processed = 0;
|
|
|
|
XLGMAC_PR("budget=%d\n", budget);
|
|
|
|
/* Cleanup Tx ring first */
|
|
xlgmac_tx_poll(channel);
|
|
|
|
/* Process Rx ring next */
|
|
processed = xlgmac_rx_poll(channel, budget);
|
|
|
|
/* If we processed everything, we are done */
|
|
if (processed < budget) {
|
|
/* Turn off polling */
|
|
napi_complete_done(napi, processed);
|
|
|
|
/* Enable Tx and Rx interrupts */
|
|
enable_irq(channel->dma_irq);
|
|
}
|
|
|
|
XLGMAC_PR("received = %d\n", processed);
|
|
|
|
return processed;
|
|
}
|
|
|
|
static int xlgmac_all_poll(struct napi_struct *napi, int budget)
|
|
{
|
|
struct xlgmac_pdata *pdata = container_of(napi,
|
|
struct xlgmac_pdata,
|
|
napi);
|
|
struct xlgmac_channel *channel;
|
|
int processed, last_processed;
|
|
int ring_budget;
|
|
unsigned int i;
|
|
|
|
XLGMAC_PR("budget=%d\n", budget);
|
|
|
|
processed = 0;
|
|
ring_budget = budget / pdata->rx_ring_count;
|
|
do {
|
|
last_processed = processed;
|
|
|
|
channel = pdata->channel_head;
|
|
for (i = 0; i < pdata->channel_count; i++, channel++) {
|
|
/* Cleanup Tx ring first */
|
|
xlgmac_tx_poll(channel);
|
|
|
|
/* Process Rx ring next */
|
|
if (ring_budget > (budget - processed))
|
|
ring_budget = budget - processed;
|
|
processed += xlgmac_rx_poll(channel, ring_budget);
|
|
}
|
|
} while ((processed < budget) && (processed != last_processed));
|
|
|
|
/* If we processed everything, we are done */
|
|
if (processed < budget) {
|
|
/* Turn off polling */
|
|
napi_complete_done(napi, processed);
|
|
|
|
/* Enable Tx and Rx interrupts */
|
|
xlgmac_enable_rx_tx_ints(pdata);
|
|
}
|
|
|
|
XLGMAC_PR("received = %d\n", processed);
|
|
|
|
return processed;
|
|
}
|