diff options
Diffstat (limited to 'drivers/net/ethernet/intel/i40e/i40e_txrx.c')
| -rw-r--r-- | drivers/net/ethernet/intel/i40e/i40e_txrx.c | 1828 |
1 files changed, 1063 insertions, 765 deletions
diff --git a/drivers/net/ethernet/intel/i40e/i40e_txrx.c b/drivers/net/ethernet/intel/i40e/i40e_txrx.c index a7e14e98889f..cc0b9efc2637 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_txrx.c +++ b/drivers/net/ethernet/intel/i40e/i40e_txrx.c @@ -1,13 +1,15 @@ // SPDX-License-Identifier: GPL-2.0 /* Copyright(c) 2013 - 2018 Intel Corporation. */ -#include <linux/prefetch.h> #include <linux/bpf_trace.h> +#include <linux/net/intel/libie/pctype.h> +#include <linux/net/intel/libie/rx.h> +#include <linux/prefetch.h> +#include <linux/sctp.h> +#include <net/mpls.h> #include <net/xdp.h> -#include "i40e.h" -#include "i40e_trace.h" -#include "i40e_prototype.h" #include "i40e_txrx_common.h" +#include "i40e_trace.h" #include "i40e_xsk.h" #define I40E_TXD_CMD (I40E_TX_DESC_CMD_EOP | I40E_TX_DESC_CMD_RS) @@ -23,7 +25,7 @@ static void i40e_fdir(struct i40e_ring *tx_ring, { struct i40e_filter_program_desc *fdir_desc; struct i40e_pf *pf = tx_ring->vsi->back; - u32 flex_ptype, dtype_cmd; + u32 flex_ptype, dtype_cmd, vsi_id; u16 i; /* grab the next descriptor */ @@ -33,22 +35,16 @@ static void i40e_fdir(struct i40e_ring *tx_ring, i++; tx_ring->next_to_use = (i < tx_ring->count) ? i : 0; - flex_ptype = I40E_TXD_FLTR_QW0_QINDEX_MASK & - (fdata->q_index << I40E_TXD_FLTR_QW0_QINDEX_SHIFT); + flex_ptype = FIELD_PREP(I40E_TXD_FLTR_QW0_QINDEX_MASK, fdata->q_index); - flex_ptype |= I40E_TXD_FLTR_QW0_FLEXOFF_MASK & - (fdata->flex_off << I40E_TXD_FLTR_QW0_FLEXOFF_SHIFT); + flex_ptype |= FIELD_PREP(I40E_TXD_FLTR_QW0_FLEXOFF_MASK, + fdata->flex_off); - flex_ptype |= I40E_TXD_FLTR_QW0_PCTYPE_MASK & - (fdata->pctype << I40E_TXD_FLTR_QW0_PCTYPE_SHIFT); - - flex_ptype |= I40E_TXD_FLTR_QW0_PCTYPE_MASK & - (fdata->flex_offset << I40E_TXD_FLTR_QW0_FLEXOFF_SHIFT); + flex_ptype |= FIELD_PREP(I40E_TXD_FLTR_QW0_PCTYPE_MASK, fdata->pctype); /* Use LAN VSI Id if not programmed by user */ - flex_ptype |= I40E_TXD_FLTR_QW0_DEST_VSI_MASK & - ((u32)(fdata->dest_vsi ? : pf->vsi[pf->lan_vsi]->id) << - I40E_TXD_FLTR_QW0_DEST_VSI_SHIFT); + vsi_id = fdata->dest_vsi ? : i40e_pf_get_main_vsi(pf)->id; + flex_ptype |= FIELD_PREP(I40E_TXD_FLTR_QW0_DEST_VSI_MASK, vsi_id); dtype_cmd = I40E_TX_DESC_DTYPE_FILTER_PROG; @@ -58,17 +54,15 @@ static void i40e_fdir(struct i40e_ring *tx_ring, I40E_FILTER_PROGRAM_DESC_PCMD_REMOVE << I40E_TXD_FLTR_QW1_PCMD_SHIFT; - dtype_cmd |= I40E_TXD_FLTR_QW1_DEST_MASK & - (fdata->dest_ctl << I40E_TXD_FLTR_QW1_DEST_SHIFT); + dtype_cmd |= FIELD_PREP(I40E_TXD_FLTR_QW1_DEST_MASK, fdata->dest_ctl); - dtype_cmd |= I40E_TXD_FLTR_QW1_FD_STATUS_MASK & - (fdata->fd_status << I40E_TXD_FLTR_QW1_FD_STATUS_SHIFT); + dtype_cmd |= FIELD_PREP(I40E_TXD_FLTR_QW1_FD_STATUS_MASK, + fdata->fd_status); if (fdata->cnt_index) { dtype_cmd |= I40E_TXD_FLTR_QW1_CNT_ENA_MASK; - dtype_cmd |= I40E_TXD_FLTR_QW1_CNTINDEX_MASK & - ((u32)fdata->cnt_index << - I40E_TXD_FLTR_QW1_CNTINDEX_SHIFT); + dtype_cmd |= FIELD_PREP(I40E_TXD_FLTR_QW1_CNTINDEX_MASK, + fdata->cnt_index); } fdir_desc->qindex_flex_ptype_vsi = cpu_to_le32(flex_ptype); @@ -160,59 +154,180 @@ dma_fail: return -1; } -#define IP_HEADER_OFFSET 14 -#define I40E_UDPIP_DUMMY_PACKET_LEN 42 /** - * i40e_add_del_fdir_udpv4 - Add/Remove UDPv4 filters - * @vsi: pointer to the targeted VSI - * @fd_data: the flow director data required for the FDir descriptor - * @add: true adds a filter, false removes it + * i40e_create_dummy_packet - Constructs dummy packet for HW + * @dummy_packet: preallocated space for dummy packet + * @ipv4: is layer 3 packet of version 4 or 6 + * @l4proto: next level protocol used in data portion of l3 + * @data: filter data * - * Returns 0 if the filters were successfully added or removed + * Returns address of layer 4 protocol dummy packet. **/ -static int i40e_add_del_fdir_udpv4(struct i40e_vsi *vsi, - struct i40e_fdir_filter *fd_data, - bool add) +static char *i40e_create_dummy_packet(u8 *dummy_packet, bool ipv4, u8 l4proto, + struct i40e_fdir_filter *data) +{ + bool is_vlan = !!data->vlan_tag; + struct vlan_hdr vlan = {}; + struct ipv6hdr ipv6 = {}; + struct ethhdr eth = {}; + struct iphdr ip = {}; + u8 *tmp; + + if (ipv4) { + eth.h_proto = cpu_to_be16(ETH_P_IP); + ip.protocol = l4proto; + ip.version = 0x4; + ip.ihl = 0x5; + + ip.daddr = data->dst_ip; + ip.saddr = data->src_ip; + } else { + eth.h_proto = cpu_to_be16(ETH_P_IPV6); + ipv6.nexthdr = l4proto; + ipv6.version = 0x6; + + memcpy(&ipv6.saddr.in6_u.u6_addr32, data->src_ip6, + sizeof(__be32) * 4); + memcpy(&ipv6.daddr.in6_u.u6_addr32, data->dst_ip6, + sizeof(__be32) * 4); + } + + if (is_vlan) { + vlan.h_vlan_TCI = data->vlan_tag; + vlan.h_vlan_encapsulated_proto = eth.h_proto; + eth.h_proto = data->vlan_etype; + } + + tmp = dummy_packet; + memcpy(tmp, ð, sizeof(eth)); + tmp += sizeof(eth); + + if (is_vlan) { + memcpy(tmp, &vlan, sizeof(vlan)); + tmp += sizeof(vlan); + } + + if (ipv4) { + memcpy(tmp, &ip, sizeof(ip)); + tmp += sizeof(ip); + } else { + memcpy(tmp, &ipv6, sizeof(ipv6)); + tmp += sizeof(ipv6); + } + + return tmp; +} + +/** + * i40e_create_dummy_udp_packet - helper function to create UDP packet + * @raw_packet: preallocated space for dummy packet + * @ipv4: is layer 3 packet of version 4 or 6 + * @l4proto: next level protocol used in data portion of l3 + * @data: filter data + * + * Helper function to populate udp fields. + **/ +static void i40e_create_dummy_udp_packet(u8 *raw_packet, bool ipv4, u8 l4proto, + struct i40e_fdir_filter *data) { - struct i40e_pf *pf = vsi->back; struct udphdr *udp; - struct iphdr *ip; - u8 *raw_packet; - int ret; - static char packet[] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0x08, 0, - 0x45, 0, 0, 0x1c, 0, 0, 0x40, 0, 0x40, 0x11, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; + u8 *tmp; - raw_packet = kzalloc(I40E_FDIR_MAX_RAW_PACKET_SIZE, GFP_KERNEL); - if (!raw_packet) - return -ENOMEM; - memcpy(raw_packet, packet, I40E_UDPIP_DUMMY_PACKET_LEN); + tmp = i40e_create_dummy_packet(raw_packet, ipv4, IPPROTO_UDP, data); + udp = (struct udphdr *)(tmp); + udp->dest = data->dst_port; + udp->source = data->src_port; +} + +/** + * i40e_create_dummy_tcp_packet - helper function to create TCP packet + * @raw_packet: preallocated space for dummy packet + * @ipv4: is layer 3 packet of version 4 or 6 + * @l4proto: next level protocol used in data portion of l3 + * @data: filter data + * + * Helper function to populate tcp fields. + **/ +static void i40e_create_dummy_tcp_packet(u8 *raw_packet, bool ipv4, u8 l4proto, + struct i40e_fdir_filter *data) +{ + struct tcphdr *tcp; + u8 *tmp; + /* Dummy tcp packet */ + static const char tcp_packet[] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0x50, 0x11, 0x0, 0x72, 0, 0, 0, 0}; + + tmp = i40e_create_dummy_packet(raw_packet, ipv4, IPPROTO_TCP, data); + + tcp = (struct tcphdr *)tmp; + memcpy(tcp, tcp_packet, sizeof(tcp_packet)); + tcp->dest = data->dst_port; + tcp->source = data->src_port; +} + +/** + * i40e_create_dummy_sctp_packet - helper function to create SCTP packet + * @raw_packet: preallocated space for dummy packet + * @ipv4: is layer 3 packet of version 4 or 6 + * @l4proto: next level protocol used in data portion of l3 + * @data: filter data + * + * Helper function to populate sctp fields. + **/ +static void i40e_create_dummy_sctp_packet(u8 *raw_packet, bool ipv4, + u8 l4proto, + struct i40e_fdir_filter *data) +{ + struct sctphdr *sctp; + u8 *tmp; - ip = (struct iphdr *)(raw_packet + IP_HEADER_OFFSET); - udp = (struct udphdr *)(raw_packet + IP_HEADER_OFFSET - + sizeof(struct iphdr)); + tmp = i40e_create_dummy_packet(raw_packet, ipv4, IPPROTO_SCTP, data); - ip->daddr = fd_data->dst_ip; - udp->dest = fd_data->dst_port; - ip->saddr = fd_data->src_ip; - udp->source = fd_data->src_port; + sctp = (struct sctphdr *)tmp; + sctp->dest = data->dst_port; + sctp->source = data->src_port; +} + +/** + * i40e_prepare_fdir_filter - Prepare and program fdir filter + * @pf: physical function to attach filter to + * @fd_data: filter data + * @add: add or delete filter + * @packet_addr: address of dummy packet, used in filtering + * @payload_offset: offset from dummy packet address to user defined data + * @pctype: Packet type for which filter is used + * + * Helper function to offset data of dummy packet, program it and + * handle errors. + **/ +static int i40e_prepare_fdir_filter(struct i40e_pf *pf, + struct i40e_fdir_filter *fd_data, + bool add, char *packet_addr, + int payload_offset, u8 pctype) +{ + int ret; if (fd_data->flex_filter) { - u8 *payload = raw_packet + I40E_UDPIP_DUMMY_PACKET_LEN; + u8 *payload; __be16 pattern = fd_data->flex_word; u16 off = fd_data->flex_offset; + payload = packet_addr + payload_offset; + + /* If user provided vlan, offset payload by vlan header length */ + if (!!fd_data->vlan_tag) + payload += VLAN_HLEN; + *((__force __be16 *)(payload + off)) = pattern; } - fd_data->pctype = I40E_FILTER_PCTYPE_NONF_IPV4_UDP; - ret = i40e_program_fdir_filter(fd_data, raw_packet, pf, add); + fd_data->pctype = pctype; + ret = i40e_program_fdir_filter(fd_data, packet_addr, pf, add); if (ret) { dev_info(&pf->pdev->dev, "PCTYPE:%d, Filter command send failed for fd_id:%d (ret = %d)\n", fd_data->pctype, fd_data->fd_id, ret); /* Free the packet buffer since it wasn't added to the ring */ - kfree(raw_packet); return -EOPNOTSUPP; } else if (I40E_DEBUG_FD & pf->hw.debug_mask) { if (add) @@ -225,238 +340,242 @@ static int i40e_add_del_fdir_udpv4(struct i40e_vsi *vsi, fd_data->pctype, fd_data->fd_id); } - if (add) - pf->fd_udp4_filter_cnt++; - else - pf->fd_udp4_filter_cnt--; + return ret; +} - return 0; +/** + * i40e_change_filter_num - Prepare and program fdir filter + * @ipv4: is layer 3 packet of version 4 or 6 + * @add: add or delete filter + * @ipv4_filter_num: field to update + * @ipv6_filter_num: field to update + * + * Update filter number field for pf. + **/ +static void i40e_change_filter_num(bool ipv4, bool add, u16 *ipv4_filter_num, + u16 *ipv6_filter_num) +{ + if (add) { + if (ipv4) + (*ipv4_filter_num)++; + else + (*ipv6_filter_num)++; + } else { + if (ipv4) + (*ipv4_filter_num)--; + else + (*ipv6_filter_num)--; + } } -#define I40E_TCPIP_DUMMY_PACKET_LEN 54 +#define I40E_UDPIP_DUMMY_PACKET_LEN 42 +#define I40E_UDPIP6_DUMMY_PACKET_LEN 62 /** - * i40e_add_del_fdir_tcpv4 - Add/Remove TCPv4 filters + * i40e_add_del_fdir_udp - Add/Remove UDP filters * @vsi: pointer to the targeted VSI * @fd_data: the flow director data required for the FDir descriptor * @add: true adds a filter, false removes it + * @ipv4: true is v4, false is v6 * * Returns 0 if the filters were successfully added or removed **/ -static int i40e_add_del_fdir_tcpv4(struct i40e_vsi *vsi, - struct i40e_fdir_filter *fd_data, - bool add) +static int i40e_add_del_fdir_udp(struct i40e_vsi *vsi, + struct i40e_fdir_filter *fd_data, + bool add, + bool ipv4) { struct i40e_pf *pf = vsi->back; - struct tcphdr *tcp; - struct iphdr *ip; u8 *raw_packet; int ret; - /* Dummy packet */ - static char packet[] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0x08, 0, - 0x45, 0, 0, 0x28, 0, 0, 0x40, 0, 0x40, 0x6, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0x80, 0x11, - 0x0, 0x72, 0, 0, 0, 0}; raw_packet = kzalloc(I40E_FDIR_MAX_RAW_PACKET_SIZE, GFP_KERNEL); if (!raw_packet) return -ENOMEM; - memcpy(raw_packet, packet, I40E_TCPIP_DUMMY_PACKET_LEN); - - ip = (struct iphdr *)(raw_packet + IP_HEADER_OFFSET); - tcp = (struct tcphdr *)(raw_packet + IP_HEADER_OFFSET - + sizeof(struct iphdr)); - ip->daddr = fd_data->dst_ip; - tcp->dest = fd_data->dst_port; - ip->saddr = fd_data->src_ip; - tcp->source = fd_data->src_port; + i40e_create_dummy_udp_packet(raw_packet, ipv4, IPPROTO_UDP, fd_data); - if (fd_data->flex_filter) { - u8 *payload = raw_packet + I40E_TCPIP_DUMMY_PACKET_LEN; - __be16 pattern = fd_data->flex_word; - u16 off = fd_data->flex_offset; + if (ipv4) + ret = i40e_prepare_fdir_filter + (pf, fd_data, add, raw_packet, + I40E_UDPIP_DUMMY_PACKET_LEN, + LIBIE_FILTER_PCTYPE_NONF_IPV4_UDP); + else + ret = i40e_prepare_fdir_filter + (pf, fd_data, add, raw_packet, + I40E_UDPIP6_DUMMY_PACKET_LEN, + LIBIE_FILTER_PCTYPE_NONF_IPV6_UDP); - *((__force __be16 *)(payload + off)) = pattern; + if (ret) { + kfree(raw_packet); + return ret; } - fd_data->pctype = I40E_FILTER_PCTYPE_NONF_IPV4_TCP; - ret = i40e_program_fdir_filter(fd_data, raw_packet, pf, add); + i40e_change_filter_num(ipv4, add, &pf->fd_udp4_filter_cnt, + &pf->fd_udp6_filter_cnt); + + return 0; +} + +#define I40E_TCPIP_DUMMY_PACKET_LEN 54 +#define I40E_TCPIP6_DUMMY_PACKET_LEN 74 +/** + * i40e_add_del_fdir_tcp - Add/Remove TCPv4 filters + * @vsi: pointer to the targeted VSI + * @fd_data: the flow director data required for the FDir descriptor + * @add: true adds a filter, false removes it + * @ipv4: true is v4, false is v6 + * + * Returns 0 if the filters were successfully added or removed + **/ +static int i40e_add_del_fdir_tcp(struct i40e_vsi *vsi, + struct i40e_fdir_filter *fd_data, + bool add, + bool ipv4) +{ + struct i40e_pf *pf = vsi->back; + u8 *raw_packet; + int ret; + + raw_packet = kzalloc(I40E_FDIR_MAX_RAW_PACKET_SIZE, GFP_KERNEL); + if (!raw_packet) + return -ENOMEM; + + i40e_create_dummy_tcp_packet(raw_packet, ipv4, IPPROTO_TCP, fd_data); + if (ipv4) + ret = i40e_prepare_fdir_filter + (pf, fd_data, add, raw_packet, + I40E_TCPIP_DUMMY_PACKET_LEN, + LIBIE_FILTER_PCTYPE_NONF_IPV4_TCP); + else + ret = i40e_prepare_fdir_filter + (pf, fd_data, add, raw_packet, + I40E_TCPIP6_DUMMY_PACKET_LEN, + LIBIE_FILTER_PCTYPE_NONF_IPV6_TCP); + if (ret) { - dev_info(&pf->pdev->dev, - "PCTYPE:%d, Filter command send failed for fd_id:%d (ret = %d)\n", - fd_data->pctype, fd_data->fd_id, ret); - /* Free the packet buffer since it wasn't added to the ring */ kfree(raw_packet); - return -EOPNOTSUPP; - } else if (I40E_DEBUG_FD & pf->hw.debug_mask) { - if (add) - dev_info(&pf->pdev->dev, "Filter OK for PCTYPE %d loc = %d)\n", - fd_data->pctype, fd_data->fd_id); - else - dev_info(&pf->pdev->dev, - "Filter deleted for PCTYPE %d loc = %d\n", - fd_data->pctype, fd_data->fd_id); + return ret; } + i40e_change_filter_num(ipv4, add, &pf->fd_tcp4_filter_cnt, + &pf->fd_tcp6_filter_cnt); + if (add) { - pf->fd_tcp4_filter_cnt++; - if ((pf->flags & I40E_FLAG_FD_ATR_ENABLED) && + if (test_bit(I40E_FLAG_FD_ATR_ENA, pf->flags) && I40E_DEBUG_FD & pf->hw.debug_mask) dev_info(&pf->pdev->dev, "Forcing ATR off, sideband rules for TCP/IPv4 flow being applied\n"); set_bit(__I40E_FD_ATR_AUTO_DISABLED, pf->state); - } else { - pf->fd_tcp4_filter_cnt--; } - return 0; } -#define I40E_SCTPIP_DUMMY_PACKET_LEN 46 +#define I40E_SCTPIP_DUMMY_PACKET_LEN 46 +#define I40E_SCTPIP6_DUMMY_PACKET_LEN 66 /** - * i40e_add_del_fdir_sctpv4 - Add/Remove SCTPv4 Flow Director filters for + * i40e_add_del_fdir_sctp - Add/Remove SCTPv4 Flow Director filters for * a specific flow spec * @vsi: pointer to the targeted VSI * @fd_data: the flow director data required for the FDir descriptor * @add: true adds a filter, false removes it + * @ipv4: true is v4, false is v6 * * Returns 0 if the filters were successfully added or removed **/ -static int i40e_add_del_fdir_sctpv4(struct i40e_vsi *vsi, - struct i40e_fdir_filter *fd_data, - bool add) +static int i40e_add_del_fdir_sctp(struct i40e_vsi *vsi, + struct i40e_fdir_filter *fd_data, + bool add, + bool ipv4) { struct i40e_pf *pf = vsi->back; - struct sctphdr *sctp; - struct iphdr *ip; u8 *raw_packet; int ret; - /* Dummy packet */ - static char packet[] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0x08, 0, - 0x45, 0, 0, 0x20, 0, 0, 0x40, 0, 0x40, 0x84, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; raw_packet = kzalloc(I40E_FDIR_MAX_RAW_PACKET_SIZE, GFP_KERNEL); if (!raw_packet) return -ENOMEM; - memcpy(raw_packet, packet, I40E_SCTPIP_DUMMY_PACKET_LEN); - - ip = (struct iphdr *)(raw_packet + IP_HEADER_OFFSET); - sctp = (struct sctphdr *)(raw_packet + IP_HEADER_OFFSET - + sizeof(struct iphdr)); - ip->daddr = fd_data->dst_ip; - sctp->dest = fd_data->dst_port; - ip->saddr = fd_data->src_ip; - sctp->source = fd_data->src_port; + i40e_create_dummy_sctp_packet(raw_packet, ipv4, IPPROTO_SCTP, fd_data); - if (fd_data->flex_filter) { - u8 *payload = raw_packet + I40E_SCTPIP_DUMMY_PACKET_LEN; - __be16 pattern = fd_data->flex_word; - u16 off = fd_data->flex_offset; - - *((__force __be16 *)(payload + off)) = pattern; - } + if (ipv4) + ret = i40e_prepare_fdir_filter + (pf, fd_data, add, raw_packet, + I40E_SCTPIP_DUMMY_PACKET_LEN, + LIBIE_FILTER_PCTYPE_NONF_IPV4_SCTP); + else + ret = i40e_prepare_fdir_filter + (pf, fd_data, add, raw_packet, + I40E_SCTPIP6_DUMMY_PACKET_LEN, + LIBIE_FILTER_PCTYPE_NONF_IPV6_SCTP); - fd_data->pctype = I40E_FILTER_PCTYPE_NONF_IPV4_SCTP; - ret = i40e_program_fdir_filter(fd_data, raw_packet, pf, add); if (ret) { - dev_info(&pf->pdev->dev, - "PCTYPE:%d, Filter command send failed for fd_id:%d (ret = %d)\n", - fd_data->pctype, fd_data->fd_id, ret); - /* Free the packet buffer since it wasn't added to the ring */ kfree(raw_packet); - return -EOPNOTSUPP; - } else if (I40E_DEBUG_FD & pf->hw.debug_mask) { - if (add) - dev_info(&pf->pdev->dev, - "Filter OK for PCTYPE %d loc = %d\n", - fd_data->pctype, fd_data->fd_id); - else - dev_info(&pf->pdev->dev, - "Filter deleted for PCTYPE %d loc = %d\n", - fd_data->pctype, fd_data->fd_id); + return ret; } - if (add) - pf->fd_sctp4_filter_cnt++; - else - pf->fd_sctp4_filter_cnt--; + i40e_change_filter_num(ipv4, add, &pf->fd_sctp4_filter_cnt, + &pf->fd_sctp6_filter_cnt); return 0; } -#define I40E_IP_DUMMY_PACKET_LEN 34 +#define I40E_IP_DUMMY_PACKET_LEN 34 +#define I40E_IP6_DUMMY_PACKET_LEN 54 /** - * i40e_add_del_fdir_ipv4 - Add/Remove IPv4 Flow Director filters for + * i40e_add_del_fdir_ip - Add/Remove IPv4 Flow Director filters for * a specific flow spec * @vsi: pointer to the targeted VSI * @fd_data: the flow director data required for the FDir descriptor * @add: true adds a filter, false removes it + * @ipv4: true is v4, false is v6 * * Returns 0 if the filters were successfully added or removed **/ -static int i40e_add_del_fdir_ipv4(struct i40e_vsi *vsi, - struct i40e_fdir_filter *fd_data, - bool add) +static int i40e_add_del_fdir_ip(struct i40e_vsi *vsi, + struct i40e_fdir_filter *fd_data, + bool add, + bool ipv4) { struct i40e_pf *pf = vsi->back; - struct iphdr *ip; + int payload_offset; u8 *raw_packet; + int iter_start; + int iter_end; int ret; int i; - static char packet[] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0x08, 0, - 0x45, 0, 0, 0x14, 0, 0, 0x40, 0, 0x40, 0x10, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0}; - for (i = I40E_FILTER_PCTYPE_NONF_IPV4_OTHER; - i <= I40E_FILTER_PCTYPE_FRAG_IPV4; i++) { + if (ipv4) { + iter_start = LIBIE_FILTER_PCTYPE_NONF_IPV4_OTHER; + iter_end = LIBIE_FILTER_PCTYPE_FRAG_IPV4; + } else { + iter_start = LIBIE_FILTER_PCTYPE_NONF_IPV6_OTHER; + iter_end = LIBIE_FILTER_PCTYPE_FRAG_IPV6; + } + + for (i = iter_start; i <= iter_end; i++) { raw_packet = kzalloc(I40E_FDIR_MAX_RAW_PACKET_SIZE, GFP_KERNEL); if (!raw_packet) return -ENOMEM; - memcpy(raw_packet, packet, I40E_IP_DUMMY_PACKET_LEN); - ip = (struct iphdr *)(raw_packet + IP_HEADER_OFFSET); - - ip->saddr = fd_data->src_ip; - ip->daddr = fd_data->dst_ip; - ip->protocol = 0; - if (fd_data->flex_filter) { - u8 *payload = raw_packet + I40E_IP_DUMMY_PACKET_LEN; - __be16 pattern = fd_data->flex_word; - u16 off = fd_data->flex_offset; - - *((__force __be16 *)(payload + off)) = pattern; - } + /* IPv6 no header option differs from IPv4 */ + (void)i40e_create_dummy_packet + (raw_packet, ipv4, (ipv4) ? IPPROTO_IP : IPPROTO_NONE, + fd_data); - fd_data->pctype = i; - ret = i40e_program_fdir_filter(fd_data, raw_packet, pf, add); - if (ret) { - dev_info(&pf->pdev->dev, - "PCTYPE:%d, Filter command send failed for fd_id:%d (ret = %d)\n", - fd_data->pctype, fd_data->fd_id, ret); - /* The packet buffer wasn't added to the ring so we - * need to free it now. - */ - kfree(raw_packet); - return -EOPNOTSUPP; - } else if (I40E_DEBUG_FD & pf->hw.debug_mask) { - if (add) - dev_info(&pf->pdev->dev, - "Filter OK for PCTYPE %d loc = %d\n", - fd_data->pctype, fd_data->fd_id); - else - dev_info(&pf->pdev->dev, - "Filter deleted for PCTYPE %d loc = %d\n", - fd_data->pctype, fd_data->fd_id); - } + payload_offset = (ipv4) ? I40E_IP_DUMMY_PACKET_LEN : + I40E_IP6_DUMMY_PACKET_LEN; + ret = i40e_prepare_fdir_filter(pf, fd_data, add, raw_packet, + payload_offset, i); + if (ret) + goto err; } - if (add) - pf->fd_ip4_filter_cnt++; - else - pf->fd_ip4_filter_cnt--; + i40e_change_filter_num(ipv4, add, &pf->fd_ip4_filter_cnt, + &pf->fd_ip6_filter_cnt); return 0; +err: + kfree(raw_packet); + return ret; } /** @@ -469,37 +588,68 @@ static int i40e_add_del_fdir_ipv4(struct i40e_vsi *vsi, int i40e_add_del_fdir(struct i40e_vsi *vsi, struct i40e_fdir_filter *input, bool add) { + enum ip_ver { ipv6 = 0, ipv4 = 1 }; struct i40e_pf *pf = vsi->back; int ret; switch (input->flow_type & ~FLOW_EXT) { case TCP_V4_FLOW: - ret = i40e_add_del_fdir_tcpv4(vsi, input, add); + ret = i40e_add_del_fdir_tcp(vsi, input, add, ipv4); break; case UDP_V4_FLOW: - ret = i40e_add_del_fdir_udpv4(vsi, input, add); + ret = i40e_add_del_fdir_udp(vsi, input, add, ipv4); break; case SCTP_V4_FLOW: - ret = i40e_add_del_fdir_sctpv4(vsi, input, add); + ret = i40e_add_del_fdir_sctp(vsi, input, add, ipv4); + break; + case TCP_V6_FLOW: + ret = i40e_add_del_fdir_tcp(vsi, input, add, ipv6); + break; + case UDP_V6_FLOW: + ret = i40e_add_del_fdir_udp(vsi, input, add, ipv6); + break; + case SCTP_V6_FLOW: + ret = i40e_add_del_fdir_sctp(vsi, input, add, ipv6); break; case IP_USER_FLOW: - switch (input->ip4_proto) { + switch (input->ipl4_proto) { case IPPROTO_TCP: - ret = i40e_add_del_fdir_tcpv4(vsi, input, add); + ret = i40e_add_del_fdir_tcp(vsi, input, add, ipv4); break; case IPPROTO_UDP: - ret = i40e_add_del_fdir_udpv4(vsi, input, add); + ret = i40e_add_del_fdir_udp(vsi, input, add, ipv4); break; case IPPROTO_SCTP: - ret = i40e_add_del_fdir_sctpv4(vsi, input, add); + ret = i40e_add_del_fdir_sctp(vsi, input, add, ipv4); break; case IPPROTO_IP: - ret = i40e_add_del_fdir_ipv4(vsi, input, add); + ret = i40e_add_del_fdir_ip(vsi, input, add, ipv4); break; default: /* We cannot support masking based on protocol */ dev_info(&pf->pdev->dev, "Unsupported IPv4 protocol 0x%02x\n", - input->ip4_proto); + input->ipl4_proto); + return -EINVAL; + } + break; + case IPV6_USER_FLOW: + switch (input->ipl4_proto) { + case IPPROTO_TCP: + ret = i40e_add_del_fdir_tcp(vsi, input, add, ipv6); + break; + case IPPROTO_UDP: + ret = i40e_add_del_fdir_udp(vsi, input, add, ipv6); + break; + case IPPROTO_SCTP: + ret = i40e_add_del_fdir_sctp(vsi, input, add, ipv6); + break; + case IPPROTO_IP: + ret = i40e_add_del_fdir_ip(vsi, input, add, ipv6); + break; + default: + /* We cannot support masking based on protocol */ + dev_info(&pf->pdev->dev, "Unsupported IPv6 protocol 0x%02x\n", + input->ipl4_proto); return -EINVAL; } break; @@ -521,28 +671,28 @@ int i40e_add_del_fdir(struct i40e_vsi *vsi, /** * i40e_fd_handle_status - check the Programming Status for FD * @rx_ring: the Rx ring for this descriptor - * @rx_desc: the Rx descriptor for programming Status, not a packet descriptor. + * @qword0_raw: qword0 + * @qword1: qword1 after le_to_cpu * @prog_id: the id originally used for programming * * This is used to verify if the FD programming or invalidation * requested by SW to the HW is successful or not and take actions accordingly. **/ -void i40e_fd_handle_status(struct i40e_ring *rx_ring, - union i40e_rx_desc *rx_desc, u8 prog_id) +static void i40e_fd_handle_status(struct i40e_ring *rx_ring, u64 qword0_raw, + u64 qword1, u8 prog_id) { struct i40e_pf *pf = rx_ring->vsi->back; struct pci_dev *pdev = pf->pdev; + struct i40e_16b_rx_wb_qw0 *qw0; u32 fcnt_prog, fcnt_avail; u32 error; - u64 qw; - qw = le64_to_cpu(rx_desc->wb.qword1.status_error_len); - error = (qw & I40E_RX_PROG_STATUS_DESC_QW1_ERROR_MASK) >> - I40E_RX_PROG_STATUS_DESC_QW1_ERROR_SHIFT; + qw0 = (struct i40e_16b_rx_wb_qw0 *)&qword0_raw; + error = FIELD_GET(I40E_RX_PROG_STATUS_DESC_QW1_ERROR_MASK, qword1); if (error == BIT(I40E_RX_PROG_STATUS_DESC_FD_TBL_FULL_SHIFT)) { - pf->fd_inv = le32_to_cpu(rx_desc->wb.qword0.hi_dword.fd_id); - if ((rx_desc->wb.qword0.hi_dword.fd_id != 0) || + pf->fd_inv = le32_to_cpu(qw0->hi_dword.fd_id); + if (qw0->hi_dword.fd_id != 0 || (I40E_DEBUG_FD & pf->hw.debug_mask)) dev_warn(&pdev->dev, "ntuple filter loc = %d, could not be added\n", pf->fd_inv); @@ -560,7 +710,7 @@ void i40e_fd_handle_status(struct i40e_ring *rx_ring, /* store the current atr filter count */ pf->fd_atr_cnt = i40e_get_current_atr_cnt(pf); - if ((rx_desc->wb.qword0.hi_dword.fd_id == 0) && + if (qw0->hi_dword.fd_id == 0 && test_bit(__I40E_FD_SB_AUTO_DISABLED, pf->state)) { /* These set_bit() calls aren't atomic with the * test_bit() here, but worse case we potentially @@ -580,7 +730,7 @@ void i40e_fd_handle_status(struct i40e_ring *rx_ring, * FD ATR/SB and then re-enable it when there is room. */ if (fcnt_prog >= (fcnt_avail - I40E_FDIR_BUFFER_FULL_MARGIN)) { - if ((pf->flags & I40E_FLAG_FD_SB_ENABLED) && + if (test_bit(I40E_FLAG_FD_SB_ENA, pf->flags) && !test_and_set_bit(__I40E_FD_SB_AUTO_DISABLED, pf->state)) if (I40E_DEBUG_FD & pf->hw.debug_mask) @@ -589,7 +739,7 @@ void i40e_fd_handle_status(struct i40e_ring *rx_ring, } else if (error == BIT(I40E_RX_PROG_STATUS_DESC_NO_FD_ENTRY_SHIFT)) { if (I40E_DEBUG_FD & pf->hw.debug_mask) dev_info(&pdev->dev, "ntuple filter fd_id = %d, could not be removed\n", - rx_desc->wb.qword0.hi_dword.fd_id); + qw0->hi_dword.fd_id); } } @@ -635,7 +785,7 @@ void i40e_clean_tx_ring(struct i40e_ring *tx_ring) unsigned long bi_size; u16 i; - if (ring_is_xdp(tx_ring) && tx_ring->xsk_umem) { + if (ring_is_xdp(tx_ring) && tx_ring->xsk_pool) { i40e_xsk_clean_tx_ring(tx_ring); } else { /* ring already cleared, nothing to do */ @@ -712,13 +862,15 @@ u32 i40e_get_tx_pending(struct i40e_ring *ring, bool in_sw) /** * i40e_detect_recover_hung - Function to detect and recover hung_queues - * @vsi: pointer to vsi struct with tx queues + * @pf: pointer to PF struct * - * VSI has netdev and netdev has TX queues. This function is to check each of - * those TX queues if they are hung, trigger recovery by issuing SW interrupt. + * LAN VSI has netdev and netdev has TX queues. This function is to check + * each of those TX queues if they are hung, trigger recovery by issuing + * SW interrupt. **/ -void i40e_detect_recover_hung(struct i40e_vsi *vsi) +void i40e_detect_recover_hung(struct i40e_pf *pf) { + struct i40e_vsi *vsi = i40e_pf_get_main_vsi(pf); struct i40e_ring *tx_ring = NULL; struct net_device *netdev; unsigned int i; @@ -768,13 +920,15 @@ void i40e_detect_recover_hung(struct i40e_vsi *vsi) * @vsi: the VSI we care about * @tx_ring: Tx ring to clean * @napi_budget: Used to determine if we are in netpoll + * @tx_cleaned: Out parameter set to the number of TXes cleaned * * Returns true if there's any budget left (e.g. the clean is finished) **/ static bool i40e_clean_tx_irq(struct i40e_vsi *vsi, - struct i40e_ring *tx_ring, int napi_budget) + struct i40e_ring *tx_ring, int napi_budget, + unsigned int *tx_cleaned) { - u16 i = tx_ring->next_to_clean; + int i = tx_ring->next_to_clean; struct i40e_tx_buffer *tx_buf; struct i40e_tx_desc *tx_head; struct i40e_tx_desc *tx_desc; @@ -794,9 +948,6 @@ static bool i40e_clean_tx_irq(struct i40e_vsi *vsi, if (!eop_desc) break; - /* prevent any other reads prior to eop_desc */ - smp_rmb(); - i40e_trace(clean_tx_irq, tx_ring, tx_desc, tx_buf); /* we have caught up to head, no work left to do */ if (tx_head == tx_desc) @@ -893,6 +1044,7 @@ static bool i40e_clean_tx_irq(struct i40e_vsi *vsi, } } + *tx_cleaned = total_packets; return !!budget; } @@ -914,7 +1066,7 @@ static void i40e_enable_wb_on_itr(struct i40e_vsi *vsi, if (q_vector->arm_wb_state) return; - if (vsi->back->flags & I40E_FLAG_MSIX_ENABLED) { + if (test_bit(I40E_FLAG_MSIX_ENA, vsi->back->flags)) { val = I40E_PFINT_DYN_CTLN_WB_ON_ITR_MASK | I40E_PFINT_DYN_CTLN_ITR_INDX_MASK; /* set noitr */ @@ -938,7 +1090,7 @@ static void i40e_enable_wb_on_itr(struct i40e_vsi *vsi, **/ void i40e_force_wb(struct i40e_vsi *vsi, struct i40e_q_vector *q_vector) { - if (vsi->back->flags & I40E_FLAG_MSIX_ENABLED) { + if (test_bit(I40E_FLAG_MSIX_ENA, vsi->back->flags)) { u32 val = I40E_PFINT_DYN_CTLN_INTENA_MASK | I40E_PFINT_DYN_CTLN_ITR_INDX_MASK | /* set noitr */ I40E_PFINT_DYN_CTLN_SWINT_TRIG_MASK | @@ -1195,6 +1347,11 @@ clear_counts: rc->total_packets = 0; } +static struct i40e_rx_buffer *i40e_rx_bi(struct i40e_ring *rx_ring, u32 idx) +{ + return &rx_ring->rx_bi[idx]; +} + /** * i40e_reuse_rx_page - page flip buffer and store it back on the ring * @rx_ring: rx descriptor ring to store buffers on @@ -1208,7 +1365,7 @@ static void i40e_reuse_rx_page(struct i40e_ring *rx_ring, struct i40e_rx_buffer *new_buff; u16 nta = rx_ring->next_to_alloc; - new_buff = &rx_ring->rx_bi[nta]; + new_buff = i40e_rx_bi(rx_ring, nta); /* update, and store next to alloc */ nta++; @@ -1220,36 +1377,15 @@ static void i40e_reuse_rx_page(struct i40e_ring *rx_ring, new_buff->page_offset = old_buff->page_offset; new_buff->pagecnt_bias = old_buff->pagecnt_bias; - rx_ring->rx_stats.page_reuse_count++; - /* clear contents of buffer_info */ old_buff->page = NULL; } /** - * i40e_rx_is_programming_status - check for programming status descriptor - * @qw: qword representing status_error_len in CPU ordering - * - * The value of in the descriptor length field indicate if this - * is a programming status descriptor for flow director or FCoE - * by the value of I40E_RX_PROG_STATUS_DESC_LENGTH, otherwise - * it is a packet descriptor. - **/ -static inline bool i40e_rx_is_programming_status(u64 qw) -{ - /* The Rx filter programming status and SPH bit occupy the same - * spot in the descriptor. Since we don't support packet split we - * can just reuse the bit as an indication that this is a - * programming status descriptor. - */ - return qw & I40E_RXD_QW1_LENGTH_SPH_MASK; -} - -/** - * i40e_clean_programming_status - try clean the programming status descriptor + * i40e_clean_programming_status - clean the programming status descriptor * @rx_ring: the rx ring that has this descriptor - * @rx_desc: the rx descriptor written back by HW - * @qw: qword representing status_error_len in CPU ordering + * @qword0_raw: qword0 + * @qword1: qword1 representing status_error_len in CPU ordering * * Flow director should handle FD_FILTER_STATUS to check its filter programming * status being successful or not and take actions accordingly. FCoE should @@ -1257,34 +1393,15 @@ static inline bool i40e_rx_is_programming_status(u64 qw) * * Returns an i40e_rx_buffer to reuse if the cleanup occurred, otherwise NULL. **/ -struct i40e_rx_buffer *i40e_clean_programming_status( - struct i40e_ring *rx_ring, - union i40e_rx_desc *rx_desc, - u64 qw) +void i40e_clean_programming_status(struct i40e_ring *rx_ring, u64 qword0_raw, + u64 qword1) { - struct i40e_rx_buffer *rx_buffer; - u32 ntc; u8 id; - if (!i40e_rx_is_programming_status(qw)) - return NULL; - - ntc = rx_ring->next_to_clean; - - /* fetch, update, and store next to clean */ - rx_buffer = &rx_ring->rx_bi[ntc++]; - ntc = (ntc < rx_ring->count) ? ntc : 0; - rx_ring->next_to_clean = ntc; - - prefetch(I40E_RX_DESC(rx_ring, ntc)); - - id = (qw & I40E_RX_PROG_STATUS_DESC_QW1_PROGID_MASK) >> - I40E_RX_PROG_STATUS_DESC_QW1_PROGID_SHIFT; + id = FIELD_GET(I40E_RX_PROG_STATUS_DESC_QW1_PROGID_MASK, qword1); if (id == I40E_RX_PROG_STATUS_DESC_FD_FILTER_STATUS) - i40e_fd_handle_status(rx_ring, rx_desc, id); - - return rx_buffer; + i40e_fd_handle_status(rx_ring, qword0_raw, qword1, id); } /** @@ -1336,32 +1453,31 @@ err: return -ENOMEM; } +static void i40e_clear_rx_bi(struct i40e_ring *rx_ring) +{ + memset(rx_ring->rx_bi, 0, sizeof(*rx_ring->rx_bi) * rx_ring->count); +} + /** * i40e_clean_rx_ring - Free Rx buffers * @rx_ring: ring to be cleaned **/ void i40e_clean_rx_ring(struct i40e_ring *rx_ring) { - unsigned long bi_size; u16 i; /* ring already cleared, nothing to do */ if (!rx_ring->rx_bi) return; - if (rx_ring->skb) { - dev_kfree_skb(rx_ring->skb); - rx_ring->skb = NULL; - } - - if (rx_ring->xsk_umem) { + if (rx_ring->xsk_pool) { i40e_xsk_clean_rx_ring(rx_ring); goto skip_free; } /* Free all the Rx ring sk_buffs */ for (i = 0; i < rx_ring->count; i++) { - struct i40e_rx_buffer *rx_bi = &rx_ring->rx_bi[i]; + struct i40e_rx_buffer *rx_bi = i40e_rx_bi(rx_ring, i); if (!rx_bi->page) continue; @@ -1388,14 +1504,17 @@ void i40e_clean_rx_ring(struct i40e_ring *rx_ring) } skip_free: - bi_size = sizeof(struct i40e_rx_buffer) * rx_ring->count; - memset(rx_ring->rx_bi, 0, bi_size); + if (rx_ring->xsk_pool) + i40e_clear_rx_bi_zc(rx_ring); + else + i40e_clear_rx_bi(rx_ring); /* Zero out the descriptor ring */ memset(rx_ring->desc, 0, rx_ring->size); rx_ring->next_to_alloc = 0; rx_ring->next_to_clean = 0; + rx_ring->next_to_process = 0; rx_ring->next_to_use = 0; } @@ -1430,20 +1549,11 @@ void i40e_free_rx_resources(struct i40e_ring *rx_ring) int i40e_setup_rx_descriptors(struct i40e_ring *rx_ring) { struct device *dev = rx_ring->dev; - int err = -ENOMEM; - int bi_size; - - /* warn if we are about to overwrite the pointer */ - WARN_ON(rx_ring->rx_bi); - bi_size = sizeof(struct i40e_rx_buffer) * rx_ring->count; - rx_ring->rx_bi = kzalloc(bi_size, GFP_KERNEL); - if (!rx_ring->rx_bi) - goto err; u64_stats_init(&rx_ring->syncp); /* Round up to nearest 4K */ - rx_ring->size = rx_ring->count * sizeof(union i40e_32byte_rx_desc); + rx_ring->size = rx_ring->count * sizeof(union i40e_rx_desc); rx_ring->size = ALIGN(rx_ring->size, 4096); rx_ring->desc = dma_alloc_coherent(dev, rx_ring->size, &rx_ring->dma, GFP_KERNEL); @@ -1451,28 +1561,22 @@ int i40e_setup_rx_descriptors(struct i40e_ring *rx_ring) if (!rx_ring->desc) { dev_info(dev, "Unable to allocate memory for the Rx descriptor ring, size=%d\n", rx_ring->size); - goto err; + return -ENOMEM; } rx_ring->next_to_alloc = 0; rx_ring->next_to_clean = 0; + rx_ring->next_to_process = 0; rx_ring->next_to_use = 0; - /* XDP RX-queue info only needed for RX rings exposed to XDP */ - if (rx_ring->vsi->type == I40E_VSI_MAIN) { - err = xdp_rxq_info_reg(&rx_ring->xdp_rxq, rx_ring->netdev, - rx_ring->queue_index); - if (err < 0) - goto err; - } - rx_ring->xdp_prog = rx_ring->vsi->xdp_prog; + rx_ring->rx_bi = + kcalloc(rx_ring->count, sizeof(*rx_ring->rx_bi), GFP_KERNEL); + if (!rx_ring->rx_bi) + return -ENOMEM; + return 0; -err: - kfree(rx_ring->rx_bi); - rx_ring->rx_bi = NULL; - return err; } /** @@ -1496,16 +1600,19 @@ void i40e_release_rx_desc(struct i40e_ring *rx_ring, u32 val) writel(val, rx_ring->tail); } -/** - * i40e_rx_offset - Return expected offset into page to access data - * @rx_ring: Ring we are requesting offset of - * - * Returns the offset value for ring into the data buffer. - */ -static inline unsigned int i40e_rx_offset(struct i40e_ring *rx_ring) +#if (PAGE_SIZE >= 8192) +static unsigned int i40e_rx_frame_truesize(struct i40e_ring *rx_ring, + unsigned int size) { - return ring_uses_build_skb(rx_ring) ? I40E_SKB_PAD : 0; + unsigned int truesize; + + truesize = rx_ring->rx_offset ? + SKB_DATA_ALIGN(size + rx_ring->rx_offset) + + SKB_DATA_ALIGN(sizeof(struct skb_shared_info)) : + SKB_DATA_ALIGN(size); + return truesize; } +#endif /** * i40e_alloc_mapped_page - recycle or make a new page @@ -1534,6 +1641,8 @@ static bool i40e_alloc_mapped_page(struct i40e_ring *rx_ring, return false; } + rx_ring->rx_stats.page_alloc_count++; + /* map page for use */ dma = dma_map_page_attrs(rx_ring->dev, page, 0, i40e_rx_pg_size(rx_ring), @@ -1551,7 +1660,7 @@ static bool i40e_alloc_mapped_page(struct i40e_ring *rx_ring, bi->dma = dma; bi->page = page; - bi->page_offset = i40e_rx_offset(rx_ring); + bi->page_offset = rx_ring->rx_offset; page_ref_add(page, USHRT_MAX - 1); bi->pagecnt_bias = USHRT_MAX; @@ -1576,7 +1685,7 @@ bool i40e_alloc_rx_buffers(struct i40e_ring *rx_ring, u16 cleaned_count) return false; rx_desc = I40E_RX_DESC(rx_ring, ntu); - bi = &rx_ring->rx_bi[ntu]; + bi = i40e_rx_bi(rx_ring, ntu); do { if (!i40e_alloc_mapped_page(rx_ring, bi)) @@ -1598,7 +1707,7 @@ bool i40e_alloc_rx_buffers(struct i40e_ring *rx_ring, u16 cleaned_count) ntu++; if (unlikely(ntu == rx_ring->count)) { rx_desc = I40E_RX_DESC(rx_ring, 0); - bi = rx_ring->rx_bi; + bi = i40e_rx_bi(rx_ring, 0); ntu = 0; } @@ -1633,40 +1742,30 @@ static inline void i40e_rx_checksum(struct i40e_vsi *vsi, struct sk_buff *skb, union i40e_rx_desc *rx_desc) { - struct i40e_rx_ptype_decoded decoded; + struct libeth_rx_pt decoded; u32 rx_error, rx_status; bool ipv4, ipv6; u8 ptype; u64 qword; - qword = le64_to_cpu(rx_desc->wb.qword1.status_error_len); - ptype = (qword & I40E_RXD_QW1_PTYPE_MASK) >> I40E_RXD_QW1_PTYPE_SHIFT; - rx_error = (qword & I40E_RXD_QW1_ERROR_MASK) >> - I40E_RXD_QW1_ERROR_SHIFT; - rx_status = (qword & I40E_RXD_QW1_STATUS_MASK) >> - I40E_RXD_QW1_STATUS_SHIFT; - decoded = decode_rx_desc_ptype(ptype); - skb->ip_summed = CHECKSUM_NONE; - skb_checksum_none_assert(skb); + qword = le64_to_cpu(rx_desc->wb.qword1.status_error_len); + ptype = FIELD_GET(I40E_RXD_QW1_PTYPE_MASK, qword); - /* Rx csum enabled and ip headers found? */ - if (!(vsi->netdev->features & NETIF_F_RXCSUM)) + decoded = libie_rx_pt_parse(ptype); + if (!libeth_rx_pt_has_checksum(vsi->netdev, decoded)) return; + rx_error = FIELD_GET(I40E_RXD_QW1_ERROR_MASK, qword); + rx_status = FIELD_GET(I40E_RXD_QW1_STATUS_MASK, qword); + /* did the hardware decode the packet and checksum? */ if (!(rx_status & BIT(I40E_RX_DESC_STATUS_L3L4P_SHIFT))) return; - /* both known and outer_ip must be set for the below code to work */ - if (!(decoded.known && decoded.outer_ip)) - return; - - ipv4 = (decoded.outer_ip == I40E_RX_PTYPE_OUTER_IP) && - (decoded.outer_ip_ver == I40E_RX_PTYPE_OUTER_IPV4); - ipv6 = (decoded.outer_ip == I40E_RX_PTYPE_OUTER_IP) && - (decoded.outer_ip_ver == I40E_RX_PTYPE_OUTER_IPV6); + ipv4 = libeth_rx_pt_get_ip_ver(decoded) == LIBETH_RX_PT_OUTER_IPV4; + ipv6 = libeth_rx_pt_get_ip_ver(decoded) == LIBETH_RX_PT_OUTER_IPV6; if (ipv4 && (rx_error & (BIT(I40E_RX_DESC_ERROR_IPE_SHIFT) | @@ -1694,20 +1793,10 @@ static inline void i40e_rx_checksum(struct i40e_vsi *vsi, * we need to bump the checksum level by 1 to reflect the fact that * we are indicating we validated the inner checksum. */ - if (decoded.tunnel_type >= I40E_RX_PTYPE_TUNNEL_IP_GRENAT) + if (decoded.tunnel_type >= LIBETH_RX_PT_TUNNEL_IP_GRENAT) skb->csum_level = 1; - /* Only report checksum unnecessary for TCP, UDP, or SCTP */ - switch (decoded.inner_prot) { - case I40E_RX_PTYPE_INNER_PROT_TCP: - case I40E_RX_PTYPE_INNER_PROT_UDP: - case I40E_RX_PTYPE_INNER_PROT_SCTP: - skb->ip_summed = CHECKSUM_UNNECESSARY; - /* fall though */ - default: - break; - } - + skb->ip_summed = CHECKSUM_UNNECESSARY; return; checksum_fail: @@ -1715,29 +1804,6 @@ checksum_fail: } /** - * i40e_ptype_to_htype - get a hash type - * @ptype: the ptype value from the descriptor - * - * Returns a hash type to be used by skb_set_hash - **/ -static inline int i40e_ptype_to_htype(u8 ptype) -{ - struct i40e_rx_ptype_decoded decoded = decode_rx_desc_ptype(ptype); - - if (!decoded.known) - return PKT_HASH_TYPE_NONE; - - if (decoded.outer_ip == I40E_RX_PTYPE_OUTER_IP && - decoded.payload_layer == I40E_RX_PTYPE_PAYLOAD_LAYER_PAY4) - return PKT_HASH_TYPE_L4; - else if (decoded.outer_ip == I40E_RX_PTYPE_OUTER_IP && - decoded.payload_layer == I40E_RX_PTYPE_PAYLOAD_LAYER_PAY3) - return PKT_HASH_TYPE_L3; - else - return PKT_HASH_TYPE_L2; -} - -/** * i40e_rx_hash - set the hash value in the skb * @ring: descriptor ring * @rx_desc: specific descriptor @@ -1749,17 +1815,19 @@ static inline void i40e_rx_hash(struct i40e_ring *ring, struct sk_buff *skb, u8 rx_ptype) { + struct libeth_rx_pt decoded; u32 hash; const __le64 rss_mask = cpu_to_le64((u64)I40E_RX_DESC_FLTSTAT_RSS_HASH << I40E_RX_DESC_STATUS_FLTSTAT_SHIFT); - if (!(ring->netdev->features & NETIF_F_RXHASH)) + decoded = libie_rx_pt_parse(rx_ptype); + if (!libeth_rx_pt_has_hash(ring->netdev, decoded)) return; if ((rx_desc->wb.qword1.status_error_len & rss_mask) == rss_mask) { hash = le32_to_cpu(rx_desc->wb.qword0.hi_dword.rss); - skb_set_hash(skb, hash, i40e_ptype_to_htype(rx_ptype)); + libeth_rx_pt_set_hash(skb, hash, decoded); } } @@ -1768,7 +1836,6 @@ static inline void i40e_rx_hash(struct i40e_ring *ring, * @rx_ring: rx descriptor ring packet is being transacted on * @rx_desc: pointer to the EOP Rx descriptor * @skb: pointer to current skb being populated - * @rx_ptype: the packet type decoded by hardware * * This function checks the ring, descriptor, and packet information in * order to populate the hash, checksum, VLAN, protocol, and @@ -1778,13 +1845,10 @@ void i40e_process_skb_fields(struct i40e_ring *rx_ring, union i40e_rx_desc *rx_desc, struct sk_buff *skb) { u64 qword = le64_to_cpu(rx_desc->wb.qword1.status_error_len); - u32 rx_status = (qword & I40E_RXD_QW1_STATUS_MASK) >> - I40E_RXD_QW1_STATUS_SHIFT; + u32 rx_status = FIELD_GET(I40E_RXD_QW1_STATUS_MASK, qword); u32 tsynvalid = rx_status & I40E_RXD_QW1_STATUS_TSYNVALID_MASK; - u32 tsyn = (rx_status & I40E_RXD_QW1_STATUS_TSYNINDX_MASK) >> - I40E_RXD_QW1_STATUS_TSYNINDX_SHIFT; - u8 rx_ptype = (qword & I40E_RXD_QW1_PTYPE_MASK) >> - I40E_RXD_QW1_PTYPE_SHIFT; + u32 tsyn = FIELD_GET(I40E_RXD_QW1_STATUS_TSYNINDX_MASK, rx_status); + u8 rx_ptype = FIELD_GET(I40E_RXD_QW1_PTYPE_MASK, qword); if (unlikely(tsynvalid)) i40e_ptp_rx_hwtstamp(rx_ring->vsi->back, skb, tsyn); @@ -1796,7 +1860,7 @@ void i40e_process_skb_fields(struct i40e_ring *rx_ring, skb_record_rx_queue(skb, rx_ring->queue_index); if (qword & BIT(I40E_RX_DESC_STATUS_L2TAG1P_SHIFT)) { - u16 vlan_tag = rx_desc->wb.qword0.lo_dword.l2tag1; + __le16 vlan_tag = rx_desc->wb.qword0.lo_dword.l2tag1; __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), le16_to_cpu(vlan_tag)); @@ -1812,9 +1876,6 @@ void i40e_process_skb_fields(struct i40e_ring *rx_ring, * @skb: pointer to current skb being fixed * @rx_desc: pointer to the EOP Rx descriptor * - * Also address the case where we are pulling data in on pages only - * and as such no data is present in the skb header. - * * In addition if skb is not at least 60 bytes we need to pad it so that * it is large enough to qualify as a valid Ethernet frame. * @@ -1824,10 +1885,6 @@ static bool i40e_cleanup_headers(struct i40e_ring *rx_ring, struct sk_buff *skb, union i40e_rx_desc *rx_desc) { - /* XDP packets use error pointer so abort at this point */ - if (IS_ERR(skb)) - return true; - /* ERR_MASK will only have valid bits if EOP set, and * what we are doing here is actually checking * I40E_RX_DESC_ERROR_RXE_SHIFT, since it is the zeroth bit in @@ -1847,63 +1904,43 @@ static bool i40e_cleanup_headers(struct i40e_ring *rx_ring, struct sk_buff *skb, } /** - * i40e_page_is_reusable - check if any reuse is possible - * @page: page struct to check - * - * A page is not reusable if it was allocated under low memory - * conditions, or it's not in the same NUMA node as this CPU. - */ -static inline bool i40e_page_is_reusable(struct page *page) -{ - return (page_to_nid(page) == numa_mem_id()) && - !page_is_pfmemalloc(page); -} - -/** - * i40e_can_reuse_rx_page - Determine if this page can be reused by - * the adapter for another receive - * + * i40e_can_reuse_rx_page - Determine if page can be reused for another Rx * @rx_buffer: buffer containing the page + * @rx_stats: rx stats structure for the rx ring * - * If page is reusable, rx_buffer->page_offset is adjusted to point to - * an unused region in the page. - * - * For small pages, @truesize will be a constant value, half the size - * of the memory at page. We'll attempt to alternate between high and - * low halves of the page, with one half ready for use by the hardware - * and the other half being consumed by the stack. We use the page - * ref count to determine whether the stack has finished consuming the - * portion of this page that was passed up with a previous packet. If - * the page ref count is >1, we'll assume the "other" half page is - * still busy, and this page cannot be reused. + * If page is reusable, we have a green light for calling i40e_reuse_rx_page, + * which will assign the current buffer to the buffer that next_to_alloc is + * pointing to; otherwise, the DMA mapping needs to be destroyed and + * page freed. * - * For larger pages, @truesize will be the actual space used by the - * received packet (adjusted upward to an even multiple of the cache - * line size). This will advance through the page by the amount - * actually consumed by the received packets while there is still - * space for a buffer. Each region of larger pages will be used at - * most once, after which the page will not be reused. - * - * In either case, if the page is reusable its refcount is increased. - **/ -static bool i40e_can_reuse_rx_page(struct i40e_rx_buffer *rx_buffer) + * rx_stats will be updated to indicate whether the page was waived + * or busy if it could not be reused. + */ +static bool i40e_can_reuse_rx_page(struct i40e_rx_buffer *rx_buffer, + struct i40e_rx_queue_stats *rx_stats) { unsigned int pagecnt_bias = rx_buffer->pagecnt_bias; struct page *page = rx_buffer->page; /* Is any reuse possible? */ - if (unlikely(!i40e_page_is_reusable(page))) + if (!dev_page_is_reusable(page)) { + rx_stats->page_waive_count++; return false; + } #if (PAGE_SIZE < 8192) /* if we are only owner of page we can reuse it */ - if (unlikely((page_count(page) - pagecnt_bias) > 1)) + if (unlikely((rx_buffer->page_count - pagecnt_bias) > 1)) { + rx_stats->page_busy_count++; return false; + } #else #define I40E_LAST_OFFSET \ (SKB_WITH_OVERHEAD(PAGE_SIZE) - I40E_RXBUFFER_2048) - if (rx_buffer->page_offset > I40E_LAST_OFFSET) + if (rx_buffer->page_offset > I40E_LAST_OFFSET) { + rx_stats->page_busy_count++; return false; + } #endif /* If we have drained the page fragment pool we need to update @@ -1919,33 +1956,14 @@ static bool i40e_can_reuse_rx_page(struct i40e_rx_buffer *rx_buffer) } /** - * i40e_add_rx_frag - Add contents of Rx buffer to sk_buff - * @rx_ring: rx descriptor ring to transact packets on - * @rx_buffer: buffer containing page to add - * @skb: sk_buff to place the data into - * @size: packet length from rx_desc - * - * This function will add the data contained in rx_buffer->page to the skb. - * It will just attach the page as a frag to the skb. - * - * The function will then update the page offset. + * i40e_rx_buffer_flip - adjusted rx_buffer to point to an unused region + * @rx_buffer: Rx buffer to adjust + * @truesize: Size of adjustment **/ -static void i40e_add_rx_frag(struct i40e_ring *rx_ring, - struct i40e_rx_buffer *rx_buffer, - struct sk_buff *skb, - unsigned int size) +static void i40e_rx_buffer_flip(struct i40e_rx_buffer *rx_buffer, + unsigned int truesize) { #if (PAGE_SIZE < 8192) - unsigned int truesize = i40e_rx_pg_size(rx_ring) / 2; -#else - unsigned int truesize = SKB_DATA_ALIGN(size + i40e_rx_offset(rx_ring)); -#endif - - skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, rx_buffer->page, - rx_buffer->page_offset, size, truesize); - - /* page is being used so we must update the page offset */ -#if (PAGE_SIZE < 8192) rx_buffer->page_offset ^= truesize; #else rx_buffer->page_offset += truesize; @@ -1965,8 +1983,14 @@ static struct i40e_rx_buffer *i40e_get_rx_buffer(struct i40e_ring *rx_ring, { struct i40e_rx_buffer *rx_buffer; - rx_buffer = &rx_ring->rx_bi[rx_ring->next_to_clean]; - prefetchw(rx_buffer->page); + rx_buffer = i40e_rx_bi(rx_ring, rx_ring->next_to_process); + rx_buffer->page_count = +#if (PAGE_SIZE < 8192) + page_count(rx_buffer->page); +#else + 0; +#endif + prefetch_page_address(rx_buffer->page); /* we are reusing so sync this buffer for CPU use */ dma_sync_single_range_for_cpu(rx_ring->dev, @@ -1982,9 +2006,70 @@ static struct i40e_rx_buffer *i40e_get_rx_buffer(struct i40e_ring *rx_ring, } /** - * i40e_construct_skb - Allocate skb and populate it + * i40e_put_rx_buffer - Clean up used buffer and either recycle or free * @rx_ring: rx descriptor ring to transact packets on * @rx_buffer: rx buffer to pull data from + * + * This function will clean up the contents of the rx_buffer. It will + * either recycle the buffer or unmap it and free the associated resources. + */ +static void i40e_put_rx_buffer(struct i40e_ring *rx_ring, + struct i40e_rx_buffer *rx_buffer) +{ + if (i40e_can_reuse_rx_page(rx_buffer, &rx_ring->rx_stats)) { + /* hand second half of page back to the ring */ + i40e_reuse_rx_page(rx_ring, rx_buffer); + } else { + /* we are not reusing the buffer so unmap it */ + dma_unmap_page_attrs(rx_ring->dev, rx_buffer->dma, + i40e_rx_pg_size(rx_ring), + DMA_FROM_DEVICE, I40E_RX_DMA_ATTR); + __page_frag_cache_drain(rx_buffer->page, + rx_buffer->pagecnt_bias); + /* clear contents of buffer_info */ + rx_buffer->page = NULL; + } +} + +/** + * i40e_process_rx_buffs- Processing of buffers post XDP prog or on error + * @rx_ring: Rx descriptor ring to transact packets on + * @xdp_res: Result of the XDP program + * @xdp: xdp_buff pointing to the data + **/ +static void i40e_process_rx_buffs(struct i40e_ring *rx_ring, int xdp_res, + struct xdp_buff *xdp) +{ + u32 nr_frags = xdp_get_shared_info_from_buff(xdp)->nr_frags; + u32 next = rx_ring->next_to_clean, i = 0; + struct i40e_rx_buffer *rx_buffer; + + xdp->flags = 0; + + while (1) { + rx_buffer = i40e_rx_bi(rx_ring, next); + if (++next == rx_ring->count) + next = 0; + + if (!rx_buffer->page) + continue; + + if (xdp_res != I40E_XDP_CONSUMED) + i40e_rx_buffer_flip(rx_buffer, xdp->frame_sz); + else if (i++ <= nr_frags) + rx_buffer->pagecnt_bias++; + + /* EOP buffer will be put in i40e_clean_rx_irq() */ + if (next == rx_ring->next_to_process) + return; + + i40e_put_rx_buffer(rx_ring, rx_buffer); + } +} + +/** + * i40e_construct_skb - Allocate skb and populate it + * @rx_ring: rx descriptor ring to transact packets on * @xdp: xdp_buff pointing to the data * * This function allocates an skb. It then populates it with the page @@ -1992,23 +2077,18 @@ static struct i40e_rx_buffer *i40e_get_rx_buffer(struct i40e_ring *rx_ring, * skb correctly. */ static struct sk_buff *i40e_construct_skb(struct i40e_ring *rx_ring, - struct i40e_rx_buffer *rx_buffer, struct xdp_buff *xdp) { unsigned int size = xdp->data_end - xdp->data; -#if (PAGE_SIZE < 8192) - unsigned int truesize = i40e_rx_pg_size(rx_ring) / 2; -#else - unsigned int truesize = SKB_DATA_ALIGN(size); -#endif + struct i40e_rx_buffer *rx_buffer; + struct skb_shared_info *sinfo; unsigned int headlen; struct sk_buff *skb; + u32 nr_frags = 0; /* prefetch first cache line of first page */ - prefetch(xdp->data); -#if L1_CACHE_BYTES < 128 - prefetch(xdp->data + L1_CACHE_BYTES); -#endif + net_prefetch(xdp->data); + /* Note, we get here by enabling legacy-rx via: * * ethtool --set-priv-flags <dev> legacy-rx on @@ -2026,76 +2106,93 @@ static struct sk_buff *i40e_construct_skb(struct i40e_ring *rx_ring, */ /* allocate a skb to store the frags */ - skb = __napi_alloc_skb(&rx_ring->q_vector->napi, - I40E_RX_HDR_SIZE, - GFP_ATOMIC | __GFP_NOWARN); + skb = napi_alloc_skb(&rx_ring->q_vector->napi, I40E_RX_HDR_SIZE); if (unlikely(!skb)) return NULL; /* Determine available headroom for copy */ headlen = size; if (headlen > I40E_RX_HDR_SIZE) - headlen = eth_get_headlen(xdp->data, I40E_RX_HDR_SIZE); + headlen = eth_get_headlen(skb->dev, xdp->data, + I40E_RX_HDR_SIZE); /* align pull length to size of long to optimize memcpy performance */ memcpy(__skb_put(skb, headlen), xdp->data, ALIGN(headlen, sizeof(long))); + if (unlikely(xdp_buff_has_frags(xdp))) { + sinfo = xdp_get_shared_info_from_buff(xdp); + nr_frags = sinfo->nr_frags; + } + rx_buffer = i40e_rx_bi(rx_ring, rx_ring->next_to_clean); /* update all of the pointers */ size -= headlen; if (size) { + if (unlikely(nr_frags >= MAX_SKB_FRAGS)) { + dev_kfree_skb(skb); + return NULL; + } skb_add_rx_frag(skb, 0, rx_buffer->page, rx_buffer->page_offset + headlen, - size, truesize); - + size, xdp->frame_sz); /* buffer is used by skb, update page_offset */ -#if (PAGE_SIZE < 8192) - rx_buffer->page_offset ^= truesize; -#else - rx_buffer->page_offset += truesize; -#endif + i40e_rx_buffer_flip(rx_buffer, xdp->frame_sz); } else { /* buffer is unused, reset bias back to rx_buffer */ rx_buffer->pagecnt_bias++; } + if (unlikely(xdp_buff_has_frags(xdp))) { + struct skb_shared_info *skinfo = skb_shinfo(skb); + + memcpy(&skinfo->frags[skinfo->nr_frags], &sinfo->frags[0], + sizeof(skb_frag_t) * nr_frags); + + xdp_update_skb_frags_info(skb, skinfo->nr_frags + nr_frags, + sinfo->xdp_frags_size, + nr_frags * xdp->frame_sz, + xdp_buff_get_skb_flags(xdp)); + + /* First buffer has already been processed, so bump ntc */ + if (++rx_ring->next_to_clean == rx_ring->count) + rx_ring->next_to_clean = 0; + + i40e_process_rx_buffs(rx_ring, I40E_XDP_PASS, xdp); + } + return skb; } /** * i40e_build_skb - Build skb around an existing buffer * @rx_ring: Rx descriptor ring to transact packets on - * @rx_buffer: Rx buffer to pull data from * @xdp: xdp_buff pointing to the data * * This function builds an skb around an existing Rx buffer, taking care * to set up the skb correctly and avoid any memcpy overhead. */ static struct sk_buff *i40e_build_skb(struct i40e_ring *rx_ring, - struct i40e_rx_buffer *rx_buffer, struct xdp_buff *xdp) { unsigned int metasize = xdp->data - xdp->data_meta; -#if (PAGE_SIZE < 8192) - unsigned int truesize = i40e_rx_pg_size(rx_ring) / 2; -#else - unsigned int truesize = SKB_DATA_ALIGN(sizeof(struct skb_shared_info)) + - SKB_DATA_ALIGN(xdp->data_end - - xdp->data_hard_start); -#endif + struct skb_shared_info *sinfo; struct sk_buff *skb; + u32 nr_frags; /* Prefetch first cache line of first page. If xdp->data_meta * is unused, this points exactly as xdp->data, otherwise we * likely have a consumer accessing first few bytes of meta * data, and then actual data. */ - prefetch(xdp->data_meta); -#if L1_CACHE_BYTES < 128 - prefetch(xdp->data_meta + L1_CACHE_BYTES); -#endif + net_prefetch(xdp->data_meta); + + if (unlikely(xdp_buff_has_frags(xdp))) { + sinfo = xdp_get_shared_info_from_buff(xdp); + nr_frags = sinfo->nr_frags; + } + /* build an skb around the page buffer */ - skb = build_skb(xdp->data_hard_start, truesize); + skb = napi_build_skb(xdp->data_hard_start, xdp->frame_sz); if (unlikely(!skb)) return NULL; @@ -2105,65 +2202,34 @@ static struct sk_buff *i40e_build_skb(struct i40e_ring *rx_ring, if (metasize) skb_metadata_set(skb, metasize); - /* buffer is used by skb, update page_offset */ -#if (PAGE_SIZE < 8192) - rx_buffer->page_offset ^= truesize; -#else - rx_buffer->page_offset += truesize; -#endif - - return skb; -} + if (unlikely(xdp_buff_has_frags(xdp))) { + xdp_update_skb_frags_info(skb, nr_frags, sinfo->xdp_frags_size, + nr_frags * xdp->frame_sz, + xdp_buff_get_skb_flags(xdp)); -/** - * i40e_put_rx_buffer - Clean up used buffer and either recycle or free - * @rx_ring: rx descriptor ring to transact packets on - * @rx_buffer: rx buffer to pull data from - * - * This function will clean up the contents of the rx_buffer. It will - * either recycle the buffer or unmap it and free the associated resources. - */ -static void i40e_put_rx_buffer(struct i40e_ring *rx_ring, - struct i40e_rx_buffer *rx_buffer) -{ - if (i40e_can_reuse_rx_page(rx_buffer)) { - /* hand second half of page back to the ring */ - i40e_reuse_rx_page(rx_ring, rx_buffer); + i40e_process_rx_buffs(rx_ring, I40E_XDP_PASS, xdp); } else { - /* we are not reusing the buffer so unmap it */ - dma_unmap_page_attrs(rx_ring->dev, rx_buffer->dma, - i40e_rx_pg_size(rx_ring), - DMA_FROM_DEVICE, I40E_RX_DMA_ATTR); - __page_frag_cache_drain(rx_buffer->page, - rx_buffer->pagecnt_bias); - /* clear contents of buffer_info */ - rx_buffer->page = NULL; + struct i40e_rx_buffer *rx_buffer; + + rx_buffer = i40e_rx_bi(rx_ring, rx_ring->next_to_clean); + /* buffer is used by skb, update page_offset */ + i40e_rx_buffer_flip(rx_buffer, xdp->frame_sz); } + + return skb; } /** * i40e_is_non_eop - process handling of non-EOP buffers * @rx_ring: Rx ring being processed * @rx_desc: Rx descriptor for current buffer - * @skb: Current socket buffer containing buffer in progress * - * This function updates next to clean. If the buffer is an EOP buffer - * this function exits returning false, otherwise it will place the - * sk_buff in the next buffer to be chained and return true indicating - * that this is in fact a non-EOP buffer. - **/ -static bool i40e_is_non_eop(struct i40e_ring *rx_ring, - union i40e_rx_desc *rx_desc, - struct sk_buff *skb) + * If the buffer is an EOP buffer, this function exits returning false, + * otherwise return true indicating that this is in fact a non-EOP buffer. + */ +bool i40e_is_non_eop(struct i40e_ring *rx_ring, + union i40e_rx_desc *rx_desc) { - u32 ntc = rx_ring->next_to_clean + 1; - - /* fetch, update, and store next to clean */ - ntc = (ntc < rx_ring->count) ? ntc : 0; - rx_ring->next_to_clean = ntc; - - prefetch(I40E_RX_DESC(rx_ring, ntc)); - /* if we are the last buffer then there is nothing else to do */ #define I40E_RXD_EOF BIT(I40E_RX_DESC_STATUS_EOF_SHIFT) if (likely(i40e_test_staterr(rx_desc, I40E_RXD_EOF))) @@ -2179,7 +2245,7 @@ static int i40e_xmit_xdp_ring(struct xdp_frame *xdpf, int i40e_xmit_xdp_tx_ring(struct xdp_buff *xdp, struct i40e_ring *xdp_ring) { - struct xdp_frame *xdpf = convert_to_xdp_frame(xdp); + struct xdp_frame *xdpf = xdp_convert_buff_to_frame(xdp); if (unlikely(!xdpf)) return I40E_XDP_CONSUMED; @@ -2191,18 +2257,14 @@ int i40e_xmit_xdp_tx_ring(struct xdp_buff *xdp, struct i40e_ring *xdp_ring) * i40e_run_xdp - run an XDP program * @rx_ring: Rx ring being processed * @xdp: XDP buffer containing the frame + * @xdp_prog: XDP program to run **/ -static struct sk_buff *i40e_run_xdp(struct i40e_ring *rx_ring, - struct xdp_buff *xdp) +static int i40e_run_xdp(struct i40e_ring *rx_ring, struct xdp_buff *xdp, struct bpf_prog *xdp_prog) { int err, result = I40E_XDP_PASS; struct i40e_ring *xdp_ring; - struct bpf_prog *xdp_prog; u32 act; - rcu_read_lock(); - xdp_prog = READ_ONCE(rx_ring->xdp_prog); - if (!xdp_prog) goto xdp_out; @@ -2215,45 +2277,28 @@ static struct sk_buff *i40e_run_xdp(struct i40e_ring *rx_ring, case XDP_TX: xdp_ring = rx_ring->vsi->xdp_rings[rx_ring->queue_index]; result = i40e_xmit_xdp_tx_ring(xdp, xdp_ring); + if (result == I40E_XDP_CONSUMED) + goto out_failure; break; case XDP_REDIRECT: err = xdp_do_redirect(rx_ring->netdev, xdp, xdp_prog); - result = !err ? I40E_XDP_REDIR : I40E_XDP_CONSUMED; + if (err) + goto out_failure; + result = I40E_XDP_REDIR; break; default: - bpf_warn_invalid_xdp_action(act); - /* fall through */ + bpf_warn_invalid_xdp_action(rx_ring->netdev, xdp_prog, act); + fallthrough; case XDP_ABORTED: +out_failure: trace_xdp_exception(rx_ring->netdev, xdp_prog, act); - /* fall through -- handle aborts by dropping packet */ + fallthrough; /* handle aborts by dropping packet */ case XDP_DROP: result = I40E_XDP_CONSUMED; break; } xdp_out: - rcu_read_unlock(); - return ERR_PTR(-result); -} - -/** - * i40e_rx_buffer_flip - adjusted rx_buffer to point to an unused region - * @rx_ring: Rx ring - * @rx_buffer: Rx buffer to adjust - * @size: Size of adjustment - **/ -static void i40e_rx_buffer_flip(struct i40e_ring *rx_ring, - struct i40e_rx_buffer *rx_buffer, - unsigned int size) -{ -#if (PAGE_SIZE < 8192) - unsigned int truesize = i40e_rx_pg_size(rx_ring) / 2; - - rx_buffer->page_offset ^= truesize; -#else - unsigned int truesize = SKB_DATA_ALIGN(i40e_rx_offset(rx_ring) + size); - - rx_buffer->page_offset += truesize; -#endif + return result; } /** @@ -2303,7 +2348,7 @@ void i40e_update_rx_stats(struct i40e_ring *rx_ring, void i40e_finalize_xdp_rx(struct i40e_ring *rx_ring, unsigned int xdp_res) { if (xdp_res & I40E_XDP_REDIR) - xdp_do_flush_map(); + xdp_do_flush(); if (xdp_res & I40E_XDP_TX) { struct i40e_ring *xdp_ring = @@ -2314,9 +2359,72 @@ void i40e_finalize_xdp_rx(struct i40e_ring *rx_ring, unsigned int xdp_res) } /** + * i40e_inc_ntp: Advance the next_to_process index + * @rx_ring: Rx ring + **/ +static void i40e_inc_ntp(struct i40e_ring *rx_ring) +{ + u32 ntp = rx_ring->next_to_process + 1; + + ntp = (ntp < rx_ring->count) ? ntp : 0; + rx_ring->next_to_process = ntp; + prefetch(I40E_RX_DESC(rx_ring, ntp)); +} + +/** + * i40e_add_xdp_frag: Add a frag to xdp_buff + * @xdp: xdp_buff pointing to the data + * @nr_frags: return number of buffers for the packet + * @rx_buffer: rx_buffer holding data of the current frag + * @size: size of data of current frag + */ +static int i40e_add_xdp_frag(struct xdp_buff *xdp, u32 *nr_frags, + struct i40e_rx_buffer *rx_buffer, u32 size) +{ + struct skb_shared_info *sinfo = xdp_get_shared_info_from_buff(xdp); + + if (!xdp_buff_has_frags(xdp)) { + sinfo->nr_frags = 0; + sinfo->xdp_frags_size = 0; + xdp_buff_set_frags_flag(xdp); + } else if (unlikely(sinfo->nr_frags >= MAX_SKB_FRAGS)) { + /* Overflowing packet: All frags need to be dropped */ + return -ENOMEM; + } + + __skb_fill_page_desc_noacc(sinfo, sinfo->nr_frags++, rx_buffer->page, + rx_buffer->page_offset, size); + + sinfo->xdp_frags_size += size; + + if (page_is_pfmemalloc(rx_buffer->page)) + xdp_buff_set_frag_pfmemalloc(xdp); + *nr_frags = sinfo->nr_frags; + + return 0; +} + +/** + * i40e_consume_xdp_buff - Consume all the buffers of the packet and update ntc + * @rx_ring: rx descriptor ring to transact packets on + * @xdp: xdp_buff pointing to the data + * @rx_buffer: rx_buffer of eop desc + */ +static void i40e_consume_xdp_buff(struct i40e_ring *rx_ring, + struct xdp_buff *xdp, + struct i40e_rx_buffer *rx_buffer) +{ + i40e_process_rx_buffs(rx_ring, I40E_XDP_CONSUMED, xdp); + i40e_put_rx_buffer(rx_ring, rx_buffer); + rx_ring->next_to_clean = rx_ring->next_to_process; + xdp->data = NULL; +} + +/** * i40e_clean_rx_irq - Clean completed descriptors from Rx ring - bounce buf * @rx_ring: rx descriptor ring to transact packets on * @budget: Total limit on number of packets to process + * @rx_cleaned: Out parameter of the number of packets processed * * This function provides a "bounce buffer" approach to Rx interrupt * processing. The advantage to this is that on systems that have @@ -2325,31 +2433,39 @@ void i40e_finalize_xdp_rx(struct i40e_ring *rx_ring, unsigned int xdp_res) * * Returns amount of work completed **/ -static int i40e_clean_rx_irq(struct i40e_ring *rx_ring, int budget) +static int i40e_clean_rx_irq(struct i40e_ring *rx_ring, int budget, + unsigned int *rx_cleaned) { unsigned int total_rx_bytes = 0, total_rx_packets = 0; - struct sk_buff *skb = rx_ring->skb; u16 cleaned_count = I40E_DESC_UNUSED(rx_ring); + u16 clean_threshold = rx_ring->count / 2; + unsigned int offset = rx_ring->rx_offset; + struct xdp_buff *xdp = &rx_ring->xdp; unsigned int xdp_xmit = 0; + struct bpf_prog *xdp_prog; bool failure = false; - struct xdp_buff xdp; + int xdp_res = 0; - xdp.rxq = &rx_ring->xdp_rxq; + xdp_prog = READ_ONCE(rx_ring->xdp_prog); while (likely(total_rx_packets < (unsigned int)budget)) { + u16 ntp = rx_ring->next_to_process; struct i40e_rx_buffer *rx_buffer; union i40e_rx_desc *rx_desc; + struct sk_buff *skb; unsigned int size; + u32 nfrags = 0; + bool neop; u64 qword; /* return some buffers to hardware, one at a time is too slow */ - if (cleaned_count >= I40E_RX_BUFFER_WRITE) { + if (cleaned_count >= clean_threshold) { failure = failure || i40e_alloc_rx_buffers(rx_ring, cleaned_count); cleaned_count = 0; } - rx_desc = I40E_RX_DESC(rx_ring, rx_ring->next_to_clean); + rx_desc = I40E_RX_DESC(rx_ring, ntp); /* status_error_len will always be zero for unused descriptors * because it's cleared in cleanup, and overlaps with hdr_addr @@ -2364,95 +2480,131 @@ static int i40e_clean_rx_irq(struct i40e_ring *rx_ring, int budget) */ dma_rmb(); - rx_buffer = i40e_clean_programming_status(rx_ring, rx_desc, - qword); - if (unlikely(rx_buffer)) { + if (i40e_rx_is_programming_status(qword)) { + i40e_clean_programming_status(rx_ring, + rx_desc->raw.qword[0], + qword); + rx_buffer = i40e_rx_bi(rx_ring, ntp); + i40e_inc_ntp(rx_ring); i40e_reuse_rx_page(rx_ring, rx_buffer); - cleaned_count++; + /* Update ntc and bump cleaned count if not in the + * middle of mb packet. + */ + if (rx_ring->next_to_clean == ntp) { + rx_ring->next_to_clean = + rx_ring->next_to_process; + cleaned_count++; + } continue; } - size = (qword & I40E_RXD_QW1_LENGTH_PBUF_MASK) >> - I40E_RXD_QW1_LENGTH_PBUF_SHIFT; + size = FIELD_GET(I40E_RXD_QW1_LENGTH_PBUF_MASK, qword); if (!size) break; - i40e_trace(clean_rx_irq, rx_ring, rx_desc, skb); + i40e_trace(clean_rx_irq, rx_ring, rx_desc, xdp); + /* retrieve a buffer from the ring */ rx_buffer = i40e_get_rx_buffer(rx_ring, size); - /* retrieve a buffer from the ring */ - if (!skb) { - xdp.data = page_address(rx_buffer->page) + - rx_buffer->page_offset; - xdp.data_meta = xdp.data; - xdp.data_hard_start = xdp.data - - i40e_rx_offset(rx_ring); - xdp.data_end = xdp.data + size; - - skb = i40e_run_xdp(rx_ring, &xdp); + neop = i40e_is_non_eop(rx_ring, rx_desc); + i40e_inc_ntp(rx_ring); + + if (!xdp->data) { + unsigned char *hard_start; + + hard_start = page_address(rx_buffer->page) + + rx_buffer->page_offset - offset; + xdp_prepare_buff(xdp, hard_start, offset, size, true); +#if (PAGE_SIZE > 4096) + /* At larger PAGE_SIZE, frame_sz depend on len size */ + xdp->frame_sz = i40e_rx_frame_truesize(rx_ring, size); +#endif + } else if (i40e_add_xdp_frag(xdp, &nfrags, rx_buffer, size) && + !neop) { + /* Overflowing packet: Drop all frags on EOP */ + i40e_consume_xdp_buff(rx_ring, xdp, rx_buffer); + break; } - if (IS_ERR(skb)) { - unsigned int xdp_res = -PTR_ERR(skb); + if (neop) + continue; + + xdp_res = i40e_run_xdp(rx_ring, xdp, xdp_prog); - if (xdp_res & (I40E_XDP_TX | I40E_XDP_REDIR)) { - xdp_xmit |= xdp_res; - i40e_rx_buffer_flip(rx_ring, rx_buffer, size); + if (xdp_res) { + xdp_xmit |= xdp_res & (I40E_XDP_TX | I40E_XDP_REDIR); + + if (unlikely(xdp_buff_has_frags(xdp))) { + i40e_process_rx_buffs(rx_ring, xdp_res, xdp); + size = xdp_get_buff_len(xdp); + } else if (xdp_res & (I40E_XDP_TX | I40E_XDP_REDIR)) { + i40e_rx_buffer_flip(rx_buffer, xdp->frame_sz); } else { rx_buffer->pagecnt_bias++; } total_rx_bytes += size; - total_rx_packets++; - } else if (skb) { - i40e_add_rx_frag(rx_ring, rx_buffer, skb, size); - } else if (ring_uses_build_skb(rx_ring)) { - skb = i40e_build_skb(rx_ring, rx_buffer, &xdp); } else { - skb = i40e_construct_skb(rx_ring, rx_buffer, &xdp); - } - - /* exit if we failed to retrieve a buffer */ - if (!skb) { - rx_ring->rx_stats.alloc_buff_failed++; - rx_buffer->pagecnt_bias++; - break; - } - - i40e_put_rx_buffer(rx_ring, rx_buffer); - cleaned_count++; + if (ring_uses_build_skb(rx_ring)) + skb = i40e_build_skb(rx_ring, xdp); + else + skb = i40e_construct_skb(rx_ring, xdp); - if (i40e_is_non_eop(rx_ring, rx_desc, skb)) - continue; + /* drop if we failed to retrieve a buffer */ + if (!skb) { + rx_ring->rx_stats.alloc_buff_failed++; + i40e_consume_xdp_buff(rx_ring, xdp, rx_buffer); + break; + } - if (i40e_cleanup_headers(rx_ring, skb, rx_desc)) { - skb = NULL; - continue; - } + if (i40e_cleanup_headers(rx_ring, skb, rx_desc)) + goto process_next; - /* probably a little skewed due to removing CRC */ - total_rx_bytes += skb->len; + /* probably a little skewed due to removing CRC */ + total_rx_bytes += skb->len; - /* populate checksum, VLAN, and protocol */ - i40e_process_skb_fields(rx_ring, rx_desc, skb); + /* populate checksum, VLAN, and protocol */ + i40e_process_skb_fields(rx_ring, rx_desc, skb); - i40e_trace(clean_rx_irq_rx, rx_ring, rx_desc, skb); - napi_gro_receive(&rx_ring->q_vector->napi, skb); - skb = NULL; + i40e_trace(clean_rx_irq_rx, rx_ring, rx_desc, xdp); + napi_gro_receive(&rx_ring->q_vector->napi, skb); + } /* update budget accounting */ total_rx_packets++; +process_next: + cleaned_count += nfrags + 1; + i40e_put_rx_buffer(rx_ring, rx_buffer); + rx_ring->next_to_clean = rx_ring->next_to_process; + + xdp->data = NULL; } i40e_finalize_xdp_rx(rx_ring, xdp_xmit); - rx_ring->skb = skb; i40e_update_rx_stats(rx_ring, total_rx_bytes, total_rx_packets); + *rx_cleaned = total_rx_packets; + /* guarantee a trip back through this routine if there was a failure */ return failure ? budget : (int)total_rx_packets; } -static inline u32 i40e_buildreg_itr(const int type, u16 itr) +/** + * i40e_buildreg_itr - build a value for writing to I40E_PFINT_DYN_CTLN register + * @itr_idx: interrupt throttling index + * @interval: interrupt throttling interval value in usecs + * @force_swint: force software interrupt + * + * The function builds a value for I40E_PFINT_DYN_CTLN register that + * is used to update interrupt throttling interval for specified ITR index + * and optionally enforces a software interrupt. If the @itr_idx is equal + * to I40E_ITR_NONE then no interval change is applied and only @force_swint + * parameter is taken into account. If the interval change and enforced + * software interrupt are not requested then the built value just enables + * appropriate vector interrupt. + **/ +static u32 i40e_buildreg_itr(enum i40e_dyn_idx itr_idx, u16 interval, + bool force_swint) { u32 val; @@ -2466,23 +2618,33 @@ static inline u32 i40e_buildreg_itr(const int type, u16 itr) * an event in the PBA anyway so we need to rely on the automask * to hold pending events for us until the interrupt is re-enabled * - * The itr value is reported in microseconds, and the register - * value is recorded in 2 microsecond units. For this reason we - * only need to shift by the interval shift - 1 instead of the - * full value. + * We have to shift the given value as it is reported in microseconds + * and the register value is recorded in 2 microsecond units. */ - itr &= I40E_ITR_MASK; + interval >>= 1; + /* 1. Enable vector interrupt + * 2. Update the interval for the specified ITR index + * (I40E_ITR_NONE in the register is used to indicate that + * no interval update is requested) + */ val = I40E_PFINT_DYN_CTLN_INTENA_MASK | - (type << I40E_PFINT_DYN_CTLN_ITR_INDX_SHIFT) | - (itr << (I40E_PFINT_DYN_CTLN_INTERVAL_SHIFT - 1)); + FIELD_PREP(I40E_PFINT_DYN_CTLN_ITR_INDX_MASK, itr_idx) | + FIELD_PREP(I40E_PFINT_DYN_CTLN_INTERVAL_MASK, interval); + + /* 3. Enforce software interrupt trigger if requested + * (These software interrupts rate is limited by ITR2 that is + * set to 20K interrupts per second) + */ + if (force_swint) + val |= I40E_PFINT_DYN_CTLN_SWINT_TRIG_MASK | + I40E_PFINT_DYN_CTLN_SW_ITR_INDX_ENA_MASK | + FIELD_PREP(I40E_PFINT_DYN_CTLN_SW_ITR_INDX_MASK, + I40E_SW_ITR); return val; } -/* a small macro to shorten up some long lines */ -#define INTREG I40E_PFINT_DYN_CTLN - /* The act of updating the ITR will cause it to immediately trigger. In order * to prevent this from throwing off adaptive update statistics we defer the * update so that it can only happen so often. So after either Tx or Rx are @@ -2501,11 +2663,13 @@ static inline u32 i40e_buildreg_itr(const int type, u16 itr) static inline void i40e_update_enable_itr(struct i40e_vsi *vsi, struct i40e_q_vector *q_vector) { + enum i40e_dyn_idx itr_idx = I40E_ITR_NONE; struct i40e_hw *hw = &vsi->back->hw; - u32 intval; + u16 interval = 0; + u32 itr_val; /* If we don't have MSIX, then we only need to re-enable icr0 */ - if (!(vsi->back->flags & I40E_FLAG_MSIX_ENABLED)) { + if (!test_bit(I40E_FLAG_MSIX_ENA, vsi->back->flags)) { i40e_irq_dynamic_enable_icr0(vsi->back); return; } @@ -2524,8 +2688,8 @@ static inline void i40e_update_enable_itr(struct i40e_vsi *vsi, */ if (q_vector->rx.target_itr < q_vector->rx.current_itr) { /* Rx ITR needs to be reduced, this is highest priority */ - intval = i40e_buildreg_itr(I40E_RX_ITR, - q_vector->rx.target_itr); + itr_idx = I40E_RX_ITR; + interval = q_vector->rx.target_itr; q_vector->rx.current_itr = q_vector->rx.target_itr; q_vector->itr_countdown = ITR_COUNTDOWN_START; } else if ((q_vector->tx.target_itr < q_vector->tx.current_itr) || @@ -2534,25 +2698,36 @@ static inline void i40e_update_enable_itr(struct i40e_vsi *vsi, /* Tx ITR needs to be reduced, this is second priority * Tx ITR needs to be increased more than Rx, fourth priority */ - intval = i40e_buildreg_itr(I40E_TX_ITR, - q_vector->tx.target_itr); + itr_idx = I40E_TX_ITR; + interval = q_vector->tx.target_itr; q_vector->tx.current_itr = q_vector->tx.target_itr; q_vector->itr_countdown = ITR_COUNTDOWN_START; } else if (q_vector->rx.current_itr != q_vector->rx.target_itr) { /* Rx ITR needs to be increased, third priority */ - intval = i40e_buildreg_itr(I40E_RX_ITR, - q_vector->rx.target_itr); + itr_idx = I40E_RX_ITR; + interval = q_vector->rx.target_itr; q_vector->rx.current_itr = q_vector->rx.target_itr; q_vector->itr_countdown = ITR_COUNTDOWN_START; } else { /* No ITR update, lowest priority */ - intval = i40e_buildreg_itr(I40E_ITR_NONE, 0); if (q_vector->itr_countdown) q_vector->itr_countdown--; } - if (!test_bit(__I40E_VSI_DOWN, vsi->state)) - wr32(hw, INTREG(q_vector->reg_idx), intval); + /* Do not update interrupt control register if VSI is down */ + if (test_bit(__I40E_VSI_DOWN, vsi->state)) + return; + + /* Update ITR interval if necessary and enforce software interrupt + * if we are exiting busy poll. + */ + if (q_vector->in_busy_poll) { + itr_val = i40e_buildreg_itr(itr_idx, interval, true); + q_vector->in_busy_poll = false; + } else { + itr_val = i40e_buildreg_itr(itr_idx, interval, false); + } + wr32(hw, I40E_PFINT_DYN_CTLN(q_vector->reg_idx), itr_val); } /** @@ -2570,6 +2745,10 @@ int i40e_napi_poll(struct napi_struct *napi, int budget) container_of(napi, struct i40e_q_vector, napi); struct i40e_vsi *vsi = q_vector->vsi; struct i40e_ring *ring; + bool tx_clean_complete = true; + bool rx_clean_complete = true; + unsigned int tx_cleaned = 0; + unsigned int rx_cleaned = 0; bool clean_complete = true; bool arm_wb = false; int budget_per_ring; @@ -2584,12 +2763,12 @@ int i40e_napi_poll(struct napi_struct *napi, int budget) * budget and be more aggressive about cleaning up the Tx descriptors. */ i40e_for_each_ring(ring, q_vector->tx) { - bool wd = ring->xsk_umem ? - i40e_clean_xdp_tx_irq(vsi, ring, budget) : - i40e_clean_tx_irq(vsi, ring, budget); + bool wd = ring->xsk_pool ? + i40e_clean_xdp_tx_irq(vsi, ring) : + i40e_clean_tx_irq(vsi, ring, budget, &tx_cleaned); if (!wd) { - clean_complete = false; + clean_complete = tx_clean_complete = false; continue; } arm_wb |= ring->arm_wb; @@ -2600,22 +2779,32 @@ int i40e_napi_poll(struct napi_struct *napi, int budget) if (budget <= 0) goto tx_only; - /* We attempt to distribute budget to each Rx queue fairly, but don't - * allow the budget to go below 1 because that would exit polling early. - */ - budget_per_ring = max(budget/q_vector->num_ringpairs, 1); + /* normally we have 1 Rx ring per q_vector */ + if (unlikely(q_vector->num_ringpairs > 1)) + /* We attempt to distribute budget to each Rx queue fairly, but + * don't allow the budget to go below 1 because that would exit + * polling early. + */ + budget_per_ring = max_t(int, budget / q_vector->num_ringpairs, 1); + else + /* Max of 1 Rx ring in this q_vector so give it the budget */ + budget_per_ring = budget; i40e_for_each_ring(ring, q_vector->rx) { - int cleaned = ring->xsk_umem ? + int cleaned = ring->xsk_pool ? i40e_clean_rx_irq_zc(ring, budget_per_ring) : - i40e_clean_rx_irq(ring, budget_per_ring); + i40e_clean_rx_irq(ring, budget_per_ring, &rx_cleaned); work_done += cleaned; /* if we clean as many as budgeted, we must not be done */ if (cleaned >= budget_per_ring) - clean_complete = false; + clean_complete = rx_clean_complete = false; } + if (!i40e_enabled_xdp_vsi(vsi)) + trace_i40e_napi_poll(napi, q_vector, budget, budget_per_ring, rx_cleaned, + tx_cleaned, rx_clean_complete, tx_clean_complete); + /* If work not completed, return budget and polling will return */ if (!clean_complete) { int cpu_id = smp_processor_id(); @@ -2645,7 +2834,7 @@ tx_only: return budget; } - if (vsi->back->flags & I40E_TXR_FLAGS_WB_ON_ITR) + if (q_vector->tx.ring[0].flags & I40E_TXR_FLAGS_WB_ON_ITR) q_vector->arm_wb_state = false; /* Exit the polling mode, but don't re-enable interrupts if stack might @@ -2653,6 +2842,8 @@ tx_only: */ if (likely(napi_complete_done(napi, work_done))) i40e_update_enable_itr(vsi, q_vector); + else + q_vector->in_busy_poll = true; return min(work_done, budget - 1); } @@ -2680,7 +2871,7 @@ static void i40e_atr(struct i40e_ring *tx_ring, struct sk_buff *skb, u16 i; /* make sure ATR is enabled */ - if (!(pf->flags & I40E_FLAG_FD_ATR_ENABLED)) + if (!test_bit(I40E_FLAG_FD_ATR_ENA, pf->flags)) return; if (test_bit(__I40E_FD_ATR_AUTO_DISABLED, pf->state)) @@ -2725,7 +2916,7 @@ static void i40e_atr(struct i40e_ring *tx_ring, struct sk_buff *skb, /* Due to lack of space, no more new filters can be programmed */ if (th->syn && test_bit(__I40E_FD_ATR_AUTO_DISABLED, pf->state)) return; - if (pf->flags & I40E_FLAG_HW_ATR_EVICT_ENABLED) { + if (test_bit(I40E_FLAG_HW_ATR_EVICT_ENA, pf->flags)) { /* HW ATR eviction will take care of removing filters on FIN * and RST packets. */ @@ -2751,12 +2942,12 @@ static void i40e_atr(struct i40e_ring *tx_ring, struct sk_buff *skb, i++; tx_ring->next_to_use = (i < tx_ring->count) ? i : 0; - flex_ptype = (tx_ring->queue_index << I40E_TXD_FLTR_QW0_QINDEX_SHIFT) & - I40E_TXD_FLTR_QW0_QINDEX_MASK; + flex_ptype = FIELD_PREP(I40E_TXD_FLTR_QW0_QINDEX_MASK, + tx_ring->queue_index); flex_ptype |= (tx_flags & I40E_TX_FLAGS_IPV4) ? - (I40E_FILTER_PCTYPE_NONF_IPV4_TCP << + (LIBIE_FILTER_PCTYPE_NONF_IPV4_TCP << I40E_TXD_FLTR_QW0_PCTYPE_SHIFT) : - (I40E_FILTER_PCTYPE_NONF_IPV6_TCP << + (LIBIE_FILTER_PCTYPE_NONF_IPV6_TCP << I40E_TXD_FLTR_QW0_PCTYPE_SHIFT); flex_ptype |= tx_ring->vsi->id << I40E_TXD_FLTR_QW0_DEST_VSI_SHIFT; @@ -2778,16 +2969,14 @@ static void i40e_atr(struct i40e_ring *tx_ring, struct sk_buff *skb, dtype_cmd |= I40E_TXD_FLTR_QW1_CNT_ENA_MASK; if (!(tx_flags & I40E_TX_FLAGS_UDP_TUNNEL)) dtype_cmd |= - ((u32)I40E_FD_ATR_STAT_IDX(pf->hw.pf_id) << - I40E_TXD_FLTR_QW1_CNTINDEX_SHIFT) & - I40E_TXD_FLTR_QW1_CNTINDEX_MASK; + FIELD_PREP(I40E_TXD_FLTR_QW1_CNTINDEX_MASK, + I40E_FD_ATR_STAT_IDX(pf->hw.pf_id)); else dtype_cmd |= - ((u32)I40E_FD_ATR_TUNNEL_STAT_IDX(pf->hw.pf_id) << - I40E_TXD_FLTR_QW1_CNTINDEX_SHIFT) & - I40E_TXD_FLTR_QW1_CNTINDEX_MASK; + FIELD_PREP(I40E_TXD_FLTR_QW1_CNTINDEX_MASK, + I40E_FD_ATR_TUNNEL_STAT_IDX(pf->hw.pf_id)); - if (pf->flags & I40E_FLAG_HW_ATR_EVICT_ENABLED) + if (test_bit(I40E_FLAG_HW_ATR_EVICT_ENA, pf->flags)) dtype_cmd |= I40E_TXD_FLTR_QW1_ATR_MASK; fdir_desc->qindex_flex_ptype_vsi = cpu_to_le32(flex_ptype); @@ -2845,7 +3034,7 @@ static inline int i40e_tx_prepare_vlan_flags(struct sk_buff *skb, tx_flags |= I40E_TX_FLAGS_SW_VLAN; } - if (!(tx_ring->vsi->back->flags & I40E_FLAG_DCB_ENABLED)) + if (!test_bit(I40E_FLAG_DCB_ENA, tx_ring->vsi->back->flags)) goto out; /* Insert 802.1p priority into VLAN header */ @@ -2861,7 +3050,7 @@ static inline int i40e_tx_prepare_vlan_flags(struct sk_buff *skb, rc = skb_cow_head(skb, 0); if (rc < 0) return rc; - vhdr = (struct vlan_ethhdr *)skb->data; + vhdr = skb_vlan_eth_hdr(skb); vhdr->h_vlan_TCI = htons(tx_flags >> I40E_TX_FLAGS_VLAN_SHIFT); } else { @@ -2887,6 +3076,7 @@ static int i40e_tso(struct i40e_tx_buffer *first, u8 *hdr_len, { struct sk_buff *skb = first->skb; u64 cd_cmd, cd_tso_len, cd_mss; + __be16 protocol; union { struct iphdr *v4; struct ipv6hdr *v6; @@ -2898,7 +3088,7 @@ static int i40e_tso(struct i40e_tx_buffer *first, u8 *hdr_len, unsigned char *hdr; } l4; u32 paylen, l4_offset; - u16 gso_segs, gso_size; + u16 gso_size; int err; if (skb->ip_summed != CHECKSUM_PARTIAL) @@ -2911,15 +3101,23 @@ static int i40e_tso(struct i40e_tx_buffer *first, u8 *hdr_len, if (err < 0) return err; - ip.hdr = skb_network_header(skb); - l4.hdr = skb_transport_header(skb); + protocol = vlan_get_protocol(skb); + + if (eth_p_mpls(protocol)) + ip.hdr = skb_inner_network_header(skb); + else + ip.hdr = skb_network_header(skb); + l4.hdr = skb_checksum_start(skb); /* initialize outer IP header fields */ if (ip.v4->version == 4) { ip.v4->tot_len = 0; ip.v4->check = 0; + + first->tx_flags |= I40E_TX_FLAGS_TSO; } else { ip.v6->payload_len = 0; + first->tx_flags |= I40E_TX_FLAGS_TSO; } if (skb_shinfo(skb)->gso_type & (SKB_GSO_GRE | @@ -2959,17 +3157,22 @@ static int i40e_tso(struct i40e_tx_buffer *first, u8 *hdr_len, /* remove payload length from inner checksum */ paylen = skb->len - l4_offset; - csum_replace_by_diff(&l4.tcp->check, (__force __wsum)htonl(paylen)); - /* compute length of segmentation header */ - *hdr_len = (l4.tcp->doff * 4) + l4_offset; + if (skb_shinfo(skb)->gso_type & SKB_GSO_UDP_L4) { + csum_replace_by_diff(&l4.udp->check, (__force __wsum)htonl(paylen)); + /* compute length of segmentation header */ + *hdr_len = sizeof(*l4.udp) + l4_offset; + } else { + csum_replace_by_diff(&l4.tcp->check, (__force __wsum)htonl(paylen)); + /* compute length of segmentation header */ + *hdr_len = (l4.tcp->doff * 4) + l4_offset; + } /* pull values out of skb_shinfo */ gso_size = skb_shinfo(skb)->gso_size; - gso_segs = skb_shinfo(skb)->gso_segs; /* update GSO size and bytecount with header size */ - first->gso_segs = gso_segs; + first->gso_segs = skb_shinfo(skb)->gso_segs; first->bytecount += (first->gso_segs - 1) * *hdr_len; /* find the field values */ @@ -3007,7 +3210,7 @@ static int i40e_tsyn(struct i40e_ring *tx_ring, struct sk_buff *skb, * we are not already transmitting a packet to be timestamped */ pf = i40e_netdev_to_pf(tx_ring->netdev); - if (!(pf->flags & I40E_FLAG_PTP)) + if (!test_bit(I40E_FLAG_PTP_ENA, pf->flags)) return 0; if (pf->ptp_tx && @@ -3053,13 +3256,29 @@ static int i40e_tx_enable_csum(struct sk_buff *skb, u32 *tx_flags, unsigned char *exthdr; u32 offset, cmd = 0; __be16 frag_off; + __be16 protocol; u8 l4_proto = 0; if (skb->ip_summed != CHECKSUM_PARTIAL) return 0; - ip.hdr = skb_network_header(skb); - l4.hdr = skb_transport_header(skb); + protocol = vlan_get_protocol(skb); + + if (eth_p_mpls(protocol)) { + ip.hdr = skb_inner_network_header(skb); + l4.hdr = skb_checksum_start(skb); + } else { + ip.hdr = skb_network_header(skb); + l4.hdr = skb_transport_header(skb); + } + + /* set the tx_flags to indicate the IP protocol type. this is + * required so that checksum header computation below is accurate. + */ + if (ip.v4->version == 4) + *tx_flags |= I40E_TX_FLAGS_IPV4; + else + *tx_flags |= I40E_TX_FLAGS_IPV6; /* compute outer L2 header size */ offset = ((ip.hdr - skb->data) / 2) << I40E_TX_DESC_LENGTH_MACLEN_SHIFT; @@ -3074,13 +3293,16 @@ static int i40e_tx_enable_csum(struct sk_buff *skb, u32 *tx_flags, l4_proto = ip.v4->protocol; } else if (*tx_flags & I40E_TX_FLAGS_IPV6) { + int ret; + tunnel |= I40E_TX_CTX_EXT_IP_IPV6; exthdr = ip.hdr + sizeof(*ip.v6); l4_proto = ip.v6->nexthdr; - if (l4.hdr != exthdr) - ipv6_skip_exthdr(skb, exthdr - skb->data, - &l4_proto, &frag_off); + ret = ipv6_skip_exthdr(skb, exthdr - skb->data, + &l4_proto, &frag_off); + if (ret < 0) + return -1; } /* define outer transport */ @@ -3193,7 +3415,7 @@ static int i40e_tx_enable_csum(struct sk_buff *skb, u32 *tx_flags, } /** - * i40e_create_tx_ctx Build the Tx context descriptor + * i40e_create_tx_ctx - Build the Tx context descriptor * @tx_ring: ring to create the descriptor on * @cd_type_cmd_tso_mss: Quad Word 1 * @cd_tunneling: Quad Word 0 - bits 0-31 @@ -3236,6 +3458,8 @@ int __i40e_maybe_stop_tx(struct i40e_ring *tx_ring, int size) /* Memory barrier before checking head and tail */ smp_mb(); + ++tx_ring->tx_stats.tx_stopped; + /* Check again in a case another CPU has just made room available. */ if (likely(I40E_DESC_UNUSED(tx_ring) < size)) return -EBUSY; @@ -3261,7 +3485,7 @@ int __i40e_maybe_stop_tx(struct i40e_ring *tx_ring, int size) **/ bool __i40e_chk_linearize(struct sk_buff *skb) { - const struct skb_frag_struct *frag, *stale; + const skb_frag_t *frag, *stale; int nr_frags, sum; /* no need to check if number of frags is less than 7 */ @@ -3305,7 +3529,7 @@ bool __i40e_chk_linearize(struct sk_buff *skb) * descriptor associated with the fragment. */ if (stale_size > I40E_MAX_DATA_PER_TXD) { - int align_pad = -(stale->page_offset) & + int align_pad = -(skb_frag_off(stale)) & (I40E_MAX_READ_REQ_SIZE - 1); sum -= align_pad; @@ -3348,7 +3572,7 @@ static inline int i40e_tx_map(struct i40e_ring *tx_ring, struct sk_buff *skb, { unsigned int data_len = skb->data_len; unsigned int size = skb_headlen(skb); - struct skb_frag_struct *frag; + skb_frag_t *frag; struct i40e_tx_buffer *tx_bi; struct i40e_tx_desc *tx_desc; u16 i = tx_ring->next_to_use; @@ -3358,8 +3582,7 @@ static inline int i40e_tx_map(struct i40e_ring *tx_ring, struct sk_buff *skb, if (tx_flags & I40E_TX_FLAGS_HW_VLAN) { td_cmd |= I40E_TX_DESC_CMD_IL2TAG1; - td_tag = (tx_flags & I40E_TX_FLAGS_VLAN_MASK) >> - I40E_TX_FLAGS_VLAN_SHIFT; + td_tag = FIELD_GET(I40E_TX_FLAGS_VLAN_MASK, tx_flags); } first->tx_flags = tx_flags; @@ -3469,13 +3692,8 @@ static inline int i40e_tx_map(struct i40e_ring *tx_ring, struct sk_buff *skb, first->next_to_watch = tx_desc; /* notify HW of packet */ - if (netif_xmit_stopped(txring_txq(tx_ring)) || !skb->xmit_more) { + if (netif_xmit_stopped(txring_txq(tx_ring)) || !netdev_xmit_more()) { writel(i, tx_ring->tail); - - /* we need this if more than one processor can write to our tail - * at a time, it synchronizes IO on IA64/Altix systems - */ - mmiowb(); } return 0; @@ -3499,57 +3717,144 @@ dma_error: return -1; } +static u16 i40e_swdcb_skb_tx_hash(struct net_device *dev, + const struct sk_buff *skb, + u16 num_tx_queues) +{ + u32 jhash_initval_salt = 0xd631614b; + u32 hash; + + if (skb->sk && skb->sk->sk_hash) + hash = skb->sk->sk_hash; + else + hash = (__force u16)skb->protocol ^ skb->hash; + + hash = jhash_1word(hash, jhash_initval_salt); + + return (u16)(((u64)hash * num_tx_queues) >> 32); +} + +u16 i40e_lan_select_queue(struct net_device *netdev, + struct sk_buff *skb, + struct net_device __always_unused *sb_dev) +{ + struct i40e_netdev_priv *np = netdev_priv(netdev); + struct i40e_vsi *vsi = np->vsi; + struct i40e_hw *hw; + u16 qoffset; + u16 qcount; + u8 tclass; + u16 hash; + u8 prio; + + /* is DCB enabled at all? */ + if (vsi->tc_config.numtc == 1 || + i40e_is_tc_mqprio_enabled(vsi->back)) + return netdev_pick_tx(netdev, skb, sb_dev); + + prio = skb->priority; + hw = &vsi->back->hw; + tclass = hw->local_dcbx_config.etscfg.prioritytable[prio]; + /* sanity check */ + if (unlikely(!(vsi->tc_config.enabled_tc & BIT(tclass)))) + tclass = 0; + + /* select a queue assigned for the given TC */ + qcount = vsi->tc_config.tc_info[tclass].qcount; + hash = i40e_swdcb_skb_tx_hash(netdev, skb, qcount); + + qoffset = vsi->tc_config.tc_info[tclass].qoffset; + return qoffset + hash; +} + /** * i40e_xmit_xdp_ring - transmits an XDP buffer to an XDP Tx ring - * @xdp: data to transmit + * @xdpf: data to transmit * @xdp_ring: XDP Tx ring **/ static int i40e_xmit_xdp_ring(struct xdp_frame *xdpf, struct i40e_ring *xdp_ring) { - u16 i = xdp_ring->next_to_use; - struct i40e_tx_buffer *tx_bi; - struct i40e_tx_desc *tx_desc; + struct skb_shared_info *sinfo = xdp_get_shared_info_from_frame(xdpf); + u8 nr_frags = unlikely(xdp_frame_has_frags(xdpf)) ? sinfo->nr_frags : 0; + u16 i = 0, index = xdp_ring->next_to_use; + struct i40e_tx_buffer *tx_head = &xdp_ring->tx_bi[index]; + struct i40e_tx_buffer *tx_bi = tx_head; + struct i40e_tx_desc *tx_desc = I40E_TX_DESC(xdp_ring, index); void *data = xdpf->data; u32 size = xdpf->len; - dma_addr_t dma; - if (!unlikely(I40E_DESC_UNUSED(xdp_ring))) { + if (unlikely(I40E_DESC_UNUSED(xdp_ring) < 1 + nr_frags)) { xdp_ring->tx_stats.tx_busy++; return I40E_XDP_CONSUMED; } - dma = dma_map_single(xdp_ring->dev, data, size, DMA_TO_DEVICE); - if (dma_mapping_error(xdp_ring->dev, dma)) - return I40E_XDP_CONSUMED; - tx_bi = &xdp_ring->tx_bi[i]; - tx_bi->bytecount = size; - tx_bi->gso_segs = 1; - tx_bi->xdpf = xdpf; + tx_head->bytecount = xdp_get_frame_len(xdpf); + tx_head->gso_segs = 1; + tx_head->xdpf = xdpf; - /* record length, and DMA address */ - dma_unmap_len_set(tx_bi, len, size); - dma_unmap_addr_set(tx_bi, dma, dma); + for (;;) { + dma_addr_t dma; - tx_desc = I40E_TX_DESC(xdp_ring, i); - tx_desc->buffer_addr = cpu_to_le64(dma); - tx_desc->cmd_type_offset_bsz = build_ctob(I40E_TX_DESC_CMD_ICRC - | I40E_TXD_CMD, - 0, size, 0); + dma = dma_map_single(xdp_ring->dev, data, size, DMA_TO_DEVICE); + if (dma_mapping_error(xdp_ring->dev, dma)) + goto unmap; + + /* record length, and DMA address */ + dma_unmap_len_set(tx_bi, len, size); + dma_unmap_addr_set(tx_bi, dma, dma); + + tx_desc->buffer_addr = cpu_to_le64(dma); + tx_desc->cmd_type_offset_bsz = + build_ctob(I40E_TX_DESC_CMD_ICRC, 0, size, 0); + + if (++index == xdp_ring->count) + index = 0; + + if (i == nr_frags) + break; + + tx_bi = &xdp_ring->tx_bi[index]; + tx_desc = I40E_TX_DESC(xdp_ring, index); + + data = skb_frag_address(&sinfo->frags[i]); + size = skb_frag_size(&sinfo->frags[i]); + i++; + } + + tx_desc->cmd_type_offset_bsz |= + cpu_to_le64(I40E_TXD_CMD << I40E_TXD_QW1_CMD_SHIFT); /* Make certain all of the status bits have been updated * before next_to_watch is written. */ smp_wmb(); - i++; - if (i == xdp_ring->count) - i = 0; + xdp_ring->xdp_tx_active++; - tx_bi->next_to_watch = tx_desc; - xdp_ring->next_to_use = i; + tx_head->next_to_watch = tx_desc; + xdp_ring->next_to_use = index; return I40E_XDP_TX; + +unmap: + for (;;) { + tx_bi = &xdp_ring->tx_bi[index]; + if (dma_unmap_len(tx_bi, len)) + dma_unmap_page(xdp_ring->dev, + dma_unmap_addr(tx_bi, dma), + dma_unmap_len(tx_bi, len), + DMA_TO_DEVICE); + dma_unmap_len_set(tx_bi, len, 0); + if (tx_bi == tx_head) + break; + + if (!index) + index += xdp_ring->count; + index--; + } + + return I40E_XDP_CONSUMED; } /** @@ -3567,7 +3872,6 @@ static netdev_tx_t i40e_xmit_frame_ring(struct sk_buff *skb, struct i40e_tx_buffer *first; u32 td_offset = 0; u32 tx_flags = 0; - __be16 protocol; u32 td_cmd = 0; u8 hdr_len = 0; int tso, count; @@ -3609,15 +3913,6 @@ static netdev_tx_t i40e_xmit_frame_ring(struct sk_buff *skb, if (i40e_tx_prepare_vlan_flags(skb, tx_ring, &tx_flags)) goto out_drop; - /* obtain protocol of skb */ - protocol = vlan_get_protocol(skb); - - /* setup IPv4/IPv6 offloads */ - if (protocol == htons(ETH_P_IP)) - tx_flags |= I40E_TX_FLAGS_IPV4; - else if (protocol == htons(ETH_P_IPV6)) - tx_flags |= I40E_TX_FLAGS_IPV6; - tso = i40e_tso(first, &hdr_len, &cd_type_cmd_tso_mss); if (tso < 0) @@ -3695,10 +3990,12 @@ netdev_tx_t i40e_lan_xmit_frame(struct sk_buff *skb, struct net_device *netdev) /** * i40e_xdp_xmit - Implements ndo_xdp_xmit * @dev: netdev - * @xdp: XDP buffer + * @n: number of frames + * @frames: array of XDP buffer pointers + * @flags: XDP extra info * - * Returns number of frames successfully sent. Frames that fail are - * free'ed via XDP return API. + * Returns number of frames successfully sent. Failed frames + * will be free'ed by XDP core. * * For error cases, a negative errno code is returned and no-frames * are transmitted (caller must handle freeing frames). @@ -3709,14 +4006,16 @@ int i40e_xdp_xmit(struct net_device *dev, int n, struct xdp_frame **frames, struct i40e_netdev_priv *np = netdev_priv(dev); unsigned int queue_index = smp_processor_id(); struct i40e_vsi *vsi = np->vsi; + struct i40e_pf *pf = vsi->back; struct i40e_ring *xdp_ring; - int drops = 0; + int nxmit = 0; int i; if (test_bit(__I40E_VSI_DOWN, vsi->state)) return -ENETDOWN; - if (!i40e_enabled_xdp_vsi(vsi) || queue_index >= vsi->num_queue_pairs) + if (!i40e_enabled_xdp_vsi(vsi) || queue_index >= vsi->num_queue_pairs || + test_bit(__I40E_CONFIG_BUSY, pf->state)) return -ENXIO; if (unlikely(flags & ~XDP_XMIT_FLAGS_MASK)) @@ -3729,14 +4028,13 @@ int i40e_xdp_xmit(struct net_device *dev, int n, struct xdp_frame **frames, int err; err = i40e_xmit_xdp_ring(xdpf, xdp_ring); - if (err != I40E_XDP_TX) { - xdp_return_frame_rx_napi(xdpf); - drops++; - } + if (err != I40E_XDP_TX) + break; + nxmit++; } if (unlikely(flags & XDP_XMIT_FLUSH)) i40e_xdp_ring_update_tail(xdp_ring); - return n - drops; + return nxmit; } |