diff options
| -rw-r--r-- | drivers/net/ethernet/sfc/ef10.c | 124 | ||||
| -rw-r--r-- | drivers/net/ethernet/sfc/ef100_tx.c | 9 | ||||
| -rw-r--r-- | drivers/net/ethernet/sfc/efx.c | 1 | ||||
| -rw-r--r-- | drivers/net/ethernet/sfc/efx_channels.c | 10 | ||||
| -rw-r--r-- | drivers/net/ethernet/sfc/efx_common.c | 84 | ||||
| -rw-r--r-- | drivers/net/ethernet/sfc/efx_common.h | 3 | ||||
| -rw-r--r-- | drivers/net/ethernet/sfc/ethtool_common.c | 2 | ||||
| -rw-r--r-- | drivers/net/ethernet/sfc/farch.c | 22 | ||||
| -rw-r--r-- | drivers/net/ethernet/sfc/mcdi_functions.c | 24 | ||||
| -rw-r--r-- | drivers/net/ethernet/sfc/mcdi_functions.h | 2 | ||||
| -rw-r--r-- | drivers/net/ethernet/sfc/net_driver.h | 51 | ||||
| -rw-r--r-- | drivers/net/ethernet/sfc/nic.h | 4 | ||||
| -rw-r--r-- | drivers/net/ethernet/sfc/ptp.c | 5 | ||||
| -rw-r--r-- | drivers/net/ethernet/sfc/selftest.c | 4 | ||||
| -rw-r--r-- | drivers/net/ethernet/sfc/selftest.h | 4 | ||||
| -rw-r--r-- | drivers/net/ethernet/sfc/tx.c | 39 | ||||
| -rw-r--r-- | drivers/net/ethernet/sfc/tx.h | 26 | ||||
| -rw-r--r-- | drivers/net/ethernet/sfc/tx_common.c | 10 |
18 files changed, 318 insertions, 106 deletions
diff --git a/drivers/net/ethernet/sfc/ef10.c b/drivers/net/ethernet/sfc/ef10.c index 316e14533e9d..c9df2e96ebe4 100644 --- a/drivers/net/ethernet/sfc/ef10.c +++ b/drivers/net/ethernet/sfc/ef10.c @@ -601,10 +601,14 @@ static int efx_ef10_probe(struct efx_nic *efx) efx_ef10_read_licensed_features(efx); /* We can have one VI for each vi_stride-byte region. - * However, until we use TX option descriptors we need two TX queues - * per channel. + * However, until we use TX option descriptors we need up to four + * TX queues per channel for different checksumming combinations. */ - efx->tx_queues_per_channel = 2; + if (nic_data->datapath_caps & + (1 << MC_CMD_GET_CAPABILITIES_OUT_VXLAN_NVGRE_LBN)) + efx->tx_queues_per_channel = 4; + else + efx->tx_queues_per_channel = 2; efx->max_vis = efx_ef10_mem_map_size(efx) / efx->vi_stride; if (!efx->max_vis) { netif_err(efx, drv, efx->net_dev, "error determining max VIs\n"); @@ -1300,6 +1304,7 @@ static void efx_ef10_fini_nic(struct efx_nic *efx) static int efx_ef10_init_nic(struct efx_nic *efx) { struct efx_ef10_nic_data *nic_data = efx->nic_data; + netdev_features_t hw_enc_features = 0; int rc; if (nic_data->must_check_datapath_caps) { @@ -1344,6 +1349,21 @@ static int efx_ef10_init_nic(struct efx_nic *efx) nic_data->must_restore_piobufs = false; } + /* add encapsulated checksum offload features */ + if (efx_has_cap(efx, VXLAN_NVGRE) && !efx_ef10_is_vf(efx)) + hw_enc_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM; + /* add encapsulated TSO features */ + if (efx_has_cap(efx, TX_TSO_V2_ENCAP)) { + netdev_features_t encap_tso_features; + + encap_tso_features = NETIF_F_GSO_UDP_TUNNEL | NETIF_F_GSO_GRE | + NETIF_F_GSO_UDP_TUNNEL_CSUM | NETIF_F_GSO_GRE_CSUM; + + hw_enc_features |= encap_tso_features | NETIF_F_TSO; + efx->net_dev->features |= encap_tso_features; + } + efx->net_dev->hw_enc_features = hw_enc_features; + /* don't fail init if RSS setup doesn't work */ rc = efx->type->rx_push_rss_config(efx, false, efx->rss_context.rx_indir_table, NULL); @@ -2146,6 +2166,9 @@ static int efx_ef10_irq_test_generate(struct efx_nic *efx) static int efx_ef10_tx_probe(struct efx_tx_queue *tx_queue) { + /* low two bits of label are what we want for type */ + BUILD_BUG_ON((EFX_TXQ_TYPE_OUTER_CSUM | EFX_TXQ_TYPE_INNER_CSUM) != 3); + tx_queue->type = tx_queue->label & 3; return efx_nic_alloc_buffer(tx_queue->efx, &tx_queue->txd.buf, (tx_queue->ptr_mask + 1) * sizeof(efx_qword_t), @@ -2168,15 +2191,15 @@ static inline void efx_ef10_push_tx_desc(struct efx_tx_queue *tx_queue, /* Add Firmware-Assisted TSO v2 option descriptors to a queue. */ -static int efx_ef10_tx_tso_desc(struct efx_tx_queue *tx_queue, - struct sk_buff *skb, - bool *data_mapped) +int efx_ef10_tx_tso_desc(struct efx_tx_queue *tx_queue, struct sk_buff *skb, + bool *data_mapped) { struct efx_tx_buffer *buffer; + u16 inner_ipv4_id = 0; + u16 outer_ipv4_id = 0; struct tcphdr *tcp; struct iphdr *ip; - - u16 ipv4_id; + u16 ip_tot_len; u32 seqnum; u32 mss; @@ -2189,21 +2212,43 @@ static int efx_ef10_tx_tso_desc(struct efx_tx_queue *tx_queue, return -EINVAL; } - ip = ip_hdr(skb); + if (skb->encapsulation) { + if (!tx_queue->tso_encap) + return -EINVAL; + ip = ip_hdr(skb); + if (ip->version == 4) + outer_ipv4_id = ntohs(ip->id); + + ip = inner_ip_hdr(skb); + tcp = inner_tcp_hdr(skb); + } else { + ip = ip_hdr(skb); + tcp = tcp_hdr(skb); + } + + /* 8000-series EF10 hardware requires that IP Total Length be + * greater than or equal to the value it will have in each segment + * (which is at most mss + 208 + TCP header length), but also less + * than (0x10000 - inner_network_header). Otherwise the TCP + * checksum calculation will be broken for encapsulated packets. + * We fill in ip->tot_len with 0xff30, which should satisfy the + * first requirement unless the MSS is ridiculously large (which + * should be impossible as the driver max MTU is 9216); it is + * guaranteed to satisfy the second as we only attempt TSO if + * inner_network_header <= 208. + */ + ip_tot_len = -EFX_TSO2_MAX_HDRLEN; + EFX_WARN_ON_ONCE_PARANOID(mss + EFX_TSO2_MAX_HDRLEN + + (tcp->doff << 2u) > ip_tot_len); + if (ip->version == 4) { - /* Modify IPv4 header if needed. */ - ip->tot_len = 0; + ip->tot_len = htons(ip_tot_len); ip->check = 0; - ipv4_id = ntohs(ip->id); + inner_ipv4_id = ntohs(ip->id); } else { - /* Modify IPv6 header if needed. */ - struct ipv6hdr *ipv6 = ipv6_hdr(skb); - - ipv6->payload_len = 0; - ipv4_id = 0; + ((struct ipv6hdr *)ip)->payload_len = htons(ip_tot_len); } - tcp = tcp_hdr(skb); seqnum = ntohl(tcp->seq); buffer = efx_tx_queue_get_insert_buffer(tx_queue); @@ -2216,7 +2261,7 @@ static int efx_ef10_tx_tso_desc(struct efx_tx_queue *tx_queue, ESF_DZ_TX_OPTION_TYPE, ESE_DZ_TX_OPTION_DESC_TSO, ESF_DZ_TX_TSO_OPTION_TYPE, ESE_DZ_TX_TSO_OPTION_DESC_FATSO2A, - ESF_DZ_TX_TSO_IP_ID, ipv4_id, + ESF_DZ_TX_TSO_IP_ID, inner_ipv4_id, ESF_DZ_TX_TSO_TCP_SEQNO, seqnum ); ++tx_queue->insert_count; @@ -2226,11 +2271,12 @@ static int efx_ef10_tx_tso_desc(struct efx_tx_queue *tx_queue, buffer->flags = EFX_TX_BUF_OPTION; buffer->len = 0; buffer->unmap_len = 0; - EFX_POPULATE_QWORD_4(buffer->option, + EFX_POPULATE_QWORD_5(buffer->option, ESF_DZ_TX_DESC_IS_OPT, 1, ESF_DZ_TX_OPTION_TYPE, ESE_DZ_TX_OPTION_DESC_TSO, ESF_DZ_TX_TSO_OPTION_TYPE, ESE_DZ_TX_TSO_OPTION_DESC_FATSO2B, + ESF_DZ_TX_TSO_OUTER_IPID, outer_ipv4_id, ESF_DZ_TX_TSO_TCP_MSS, mss ); ++tx_queue->insert_count; @@ -2254,11 +2300,11 @@ static u32 efx_ef10_tso_versions(struct efx_nic *efx) static void efx_ef10_tx_init(struct efx_tx_queue *tx_queue) { - bool csum_offload = tx_queue->label & EFX_TXQ_TYPE_OFFLOAD; + bool csum_offload = tx_queue->type & EFX_TXQ_TYPE_OUTER_CSUM; + bool inner_csum = tx_queue->type & EFX_TXQ_TYPE_INNER_CSUM; struct efx_channel *channel = tx_queue->channel; struct efx_nic *efx = tx_queue->efx; struct efx_ef10_nic_data *nic_data; - bool tso_v2 = false; efx_qword_t *txd; int rc; @@ -2281,15 +2327,18 @@ static void efx_ef10_tx_init(struct efx_tx_queue *tx_queue) * TSOv2 cannot be used with Hardware timestamping, and is never needed * for XDP tx. */ - if (csum_offload && (nic_data->datapath_caps2 & - (1 << MC_CMD_GET_CAPABILITIES_V2_OUT_TX_TSO_V2_LBN)) && - !tx_queue->timestamping && !tx_queue->xdp_tx) { - tso_v2 = true; - netif_dbg(efx, hw, efx->net_dev, "Using TSOv2 for channel %u\n", - channel->channel); + if (efx_has_cap(efx, TX_TSO_V2)) { + if ((csum_offload || inner_csum) && + !tx_queue->timestamping && !tx_queue->xdp_tx) { + tx_queue->tso_version = 2; + netif_dbg(efx, hw, efx->net_dev, "Using TSOv2 for channel %u\n", + channel->channel); + } + } else if (efx_has_cap(efx, TX_TSO)) { + tx_queue->tso_version = 1; } - rc = efx_mcdi_tx_init(tx_queue, tso_v2); + rc = efx_mcdi_tx_init(tx_queue); if (rc) goto fail; @@ -2302,22 +2351,19 @@ static void efx_ef10_tx_init(struct efx_tx_queue *tx_queue) tx_queue->buffer[0].flags = EFX_TX_BUF_OPTION; tx_queue->insert_count = 1; txd = efx_tx_desc(tx_queue, 0); - EFX_POPULATE_QWORD_5(*txd, + EFX_POPULATE_QWORD_7(*txd, ESF_DZ_TX_DESC_IS_OPT, true, ESF_DZ_TX_OPTION_TYPE, ESE_DZ_TX_OPTION_DESC_CRC_CSUM, ESF_DZ_TX_OPTION_UDP_TCP_CSUM, csum_offload, - ESF_DZ_TX_OPTION_IP_CSUM, csum_offload, + ESF_DZ_TX_OPTION_IP_CSUM, csum_offload && tx_queue->tso_version != 2, + ESF_DZ_TX_OPTION_INNER_UDP_TCP_CSUM, inner_csum, + ESF_DZ_TX_OPTION_INNER_IP_CSUM, inner_csum && tx_queue->tso_version != 2, ESF_DZ_TX_TIMESTAMP, tx_queue->timestamping); tx_queue->write_count = 1; - if (tso_v2) { - tx_queue->handle_tso = efx_ef10_tx_tso_desc; - tx_queue->tso_version = 2; - } else if (nic_data->datapath_caps & - (1 << MC_CMD_GET_CAPABILITIES_OUT_TX_TSO_LBN)) { - tx_queue->tso_version = 1; - } + if (tx_queue->tso_version == 2 && efx_has_cap(efx, TX_TSO_V2_ENCAP)) + tx_queue->tso_encap = true; wmb(); efx_ef10_push_tx_desc(tx_queue, txd); @@ -2880,7 +2926,7 @@ efx_ef10_handle_tx_event(struct efx_channel *channel, efx_qword_t *event) /* Get the transmit queue */ tx_ev_q_label = EFX_QWORD_FIELD(*event, ESF_DZ_TX_QLABEL); tx_queue = efx_channel_get_tx_queue(channel, - tx_ev_q_label % EFX_TXQ_TYPES); + tx_ev_q_label % EFX_MAX_TXQ_PER_CHANNEL); if (!tx_queue->timestamping) { /* Transmit completion */ diff --git a/drivers/net/ethernet/sfc/ef100_tx.c b/drivers/net/ethernet/sfc/ef100_tx.c index ef9c2e879499..a90e5a9d2a37 100644 --- a/drivers/net/ethernet/sfc/ef100_tx.c +++ b/drivers/net/ethernet/sfc/ef100_tx.c @@ -37,7 +37,14 @@ void ef100_tx_init(struct efx_tx_queue *tx_queue) tx_queue->channel->channel - tx_queue->efx->tx_channel_offset); - if (efx_mcdi_tx_init(tx_queue, false)) + /* This value is purely documentational; as EF100 never passes through + * the switch statement in tx.c:__efx_enqueue_skb(), that switch does + * not handle case 3. EF100's TSOv3 descriptors are generated by + * ef100_make_tso_desc(). + * Meanwhile, all efx_mcdi_tx_init() cares about is that it's not 2. + */ + tx_queue->tso_version = 3; + if (efx_mcdi_tx_init(tx_queue)) netdev_WARN(tx_queue->efx->net_dev, "failed to initialise TXQ %d\n", tx_queue->queue); } diff --git a/drivers/net/ethernet/sfc/efx.c b/drivers/net/ethernet/sfc/efx.c index 58b043f946b4..718308076341 100644 --- a/drivers/net/ethernet/sfc/efx.c +++ b/drivers/net/ethernet/sfc/efx.c @@ -596,6 +596,7 @@ static const struct net_device_ops efx_netdev_ops = { .ndo_set_mac_address = efx_set_mac_address, .ndo_set_rx_mode = efx_set_rx_mode, .ndo_set_features = efx_set_features, + .ndo_features_check = efx_features_check, .ndo_vlan_rx_add_vid = efx_vlan_rx_add_vid, .ndo_vlan_rx_kill_vid = efx_vlan_rx_kill_vid, #ifdef CONFIG_SFC_SRIOV diff --git a/drivers/net/ethernet/sfc/efx_channels.c b/drivers/net/ethernet/sfc/efx_channels.c index f05ecd415ce6..a4a626e9cd9a 100644 --- a/drivers/net/ethernet/sfc/efx_channels.c +++ b/drivers/net/ethernet/sfc/efx_channels.c @@ -151,7 +151,7 @@ static int efx_allocate_msix_channels(struct efx_nic *efx, */ n_xdp_tx = num_possible_cpus(); - n_xdp_ev = DIV_ROUND_UP(n_xdp_tx, EFX_TXQ_TYPES); + n_xdp_ev = DIV_ROUND_UP(n_xdp_tx, EFX_MAX_TXQ_PER_CHANNEL); vec_count = pci_msix_vec_count(efx->pci_dev); if (vec_count < 0) @@ -179,7 +179,7 @@ static int efx_allocate_msix_channels(struct efx_nic *efx, efx->xdp_tx_queue_count = 0; } else { efx->n_xdp_channels = n_xdp_ev; - efx->xdp_tx_per_channel = EFX_TXQ_TYPES; + efx->xdp_tx_per_channel = EFX_MAX_TXQ_PER_CHANNEL; efx->xdp_tx_queue_count = n_xdp_tx; n_channels += n_xdp_ev; netif_dbg(efx, drv, efx->net_dev, @@ -520,7 +520,7 @@ static struct efx_channel *efx_alloc_channel(struct efx_nic *efx, int i) channel->channel = i; channel->type = &efx_default_channel_type; - for (j = 0; j < EFX_TXQ_TYPES; j++) { + for (j = 0; j < EFX_MAX_TXQ_PER_CHANNEL; j++) { tx_queue = &channel->tx_queue[j]; tx_queue->efx = efx; tx_queue->queue = -1; @@ -594,7 +594,7 @@ struct efx_channel *efx_copy_channel(const struct efx_channel *old_channel) channel->napi_str.state = 0; memset(&channel->eventq, 0, sizeof(channel->eventq)); - for (j = 0; j < EFX_TXQ_TYPES; j++) { + for (j = 0; j < EFX_MAX_TXQ_PER_CHANNEL; j++) { tx_queue = &channel->tx_queue[j]; if (tx_queue->channel) tx_queue->channel = channel; @@ -894,7 +894,7 @@ int efx_set_channels(struct efx_nic *efx) xdp_queue_number, tx_queue->queue); /* We may have a few left-over XDP TX * queues owing to xdp_tx_queue_count - * not dividing evenly by EFX_TXQ_TYPES. + * not dividing evenly by EFX_MAX_TXQ_PER_CHANNEL. * We still allocate and probe those * TXQs, but never use them. */ diff --git a/drivers/net/ethernet/sfc/efx_common.c b/drivers/net/ethernet/sfc/efx_common.c index 80a23def96ad..c256db241570 100644 --- a/drivers/net/ethernet/sfc/efx_common.c +++ b/drivers/net/ethernet/sfc/efx_common.c @@ -11,6 +11,7 @@ #include "net_driver.h" #include <linux/module.h> #include <linux/netdevice.h> +#include <net/gre.h> #include "efx_common.h" #include "efx_channels.h" #include "efx.h" @@ -1287,6 +1288,89 @@ const struct pci_error_handlers efx_err_handlers = { .resume = efx_io_resume, }; +/* Determine whether the NIC will be able to handle TX offloads for a given + * encapsulated packet. + */ +static bool efx_can_encap_offloads(struct efx_nic *efx, struct sk_buff *skb) +{ + struct gre_base_hdr *greh; + __be16 dst_port; + u8 ipproto; + + /* Does the NIC support encap offloads? + * If not, we should never get here, because we shouldn't have + * advertised encap offload feature flags in the first place. + */ + if (WARN_ON_ONCE(!efx->type->udp_tnl_has_port)) + return false; + + /* Determine encapsulation protocol in use */ + switch (skb->protocol) { + case htons(ETH_P_IP): + ipproto = ip_hdr(skb)->protocol; + break; + case htons(ETH_P_IPV6): + /* If there are extension headers, this will cause us to + * think we can't offload something that we maybe could have. + */ + ipproto = ipv6_hdr(skb)->nexthdr; + break; + default: + /* Not IP, so can't offload it */ + return false; + } + switch (ipproto) { + case IPPROTO_GRE: + /* We support NVGRE but not IP over GRE or random gretaps. + * Specifically, the NIC will accept GRE as encapsulated if + * the inner protocol is Ethernet, but only handle it + * correctly if the GRE header is 8 bytes long. Moreover, + * it will not update the Checksum or Sequence Number fields + * if they are present. (The Routing Present flag, + * GRE_ROUTING, cannot be set else the header would be more + * than 8 bytes long; so we don't have to worry about it.) + */ + if (skb->inner_protocol_type != ENCAP_TYPE_ETHER) + return false; + if (ntohs(skb->inner_protocol) != ETH_P_TEB) + return false; + if (skb_inner_mac_header(skb) - skb_transport_header(skb) != 8) + return false; + greh = (struct gre_base_hdr *)skb_transport_header(skb); + return !(greh->flags & (GRE_CSUM | GRE_SEQ)); + case IPPROTO_UDP: + /* If the port is registered for a UDP tunnel, we assume the + * packet is for that tunnel, and the NIC will handle it as + * such. If not, the NIC won't know what to do with it. + */ + dst_port = udp_hdr(skb)->dest; + return efx->type->udp_tnl_has_port(efx, dst_port); + default: + return false; + } +} + +netdev_features_t efx_features_check(struct sk_buff *skb, struct net_device *dev, + netdev_features_t features) +{ + struct efx_nic *efx = netdev_priv(dev); + + if (skb->encapsulation) { + if (features & NETIF_F_GSO_MASK) + /* Hardware can only do TSO with at most 208 bytes + * of headers. + */ + if (skb_inner_transport_offset(skb) > + EFX_TSO2_MAX_HDRLEN) + features &= ~(NETIF_F_GSO_MASK); + if (features & (NETIF_F_GSO_MASK | NETIF_F_CSUM_MASK)) + if (!efx_can_encap_offloads(efx, skb)) + features &= ~(NETIF_F_GSO_MASK | + NETIF_F_CSUM_MASK); + } + return features; +} + int efx_get_phys_port_id(struct net_device *net_dev, struct netdev_phys_item_id *ppid) { diff --git a/drivers/net/ethernet/sfc/efx_common.h b/drivers/net/ethernet/sfc/efx_common.h index 4056f68f04e5..65513fd0cf6c 100644 --- a/drivers/net/ethernet/sfc/efx_common.h +++ b/drivers/net/ethernet/sfc/efx_common.h @@ -105,6 +105,9 @@ int efx_change_mtu(struct net_device *net_dev, int new_mtu); extern const struct pci_error_handlers efx_err_handlers; +netdev_features_t efx_features_check(struct sk_buff *skb, struct net_device *dev, + netdev_features_t features); + int efx_get_phys_port_id(struct net_device *net_dev, struct netdev_phys_item_id *ppid); diff --git a/drivers/net/ethernet/sfc/ethtool_common.c b/drivers/net/ethernet/sfc/ethtool_common.c index b18a4bcfccdf..bf1443539a1a 100644 --- a/drivers/net/ethernet/sfc/ethtool_common.c +++ b/drivers/net/ethernet/sfc/ethtool_common.c @@ -407,7 +407,7 @@ static size_t efx_describe_per_queue_stats(struct efx_nic *efx, u8 *strings) snprintf(strings, ETH_GSTRING_LEN, "tx-%u.tx_packets", channel->tx_queue[0].queue / - EFX_TXQ_TYPES); + EFX_MAX_TXQ_PER_CHANNEL); strings += ETH_GSTRING_LEN; } diff --git a/drivers/net/ethernet/sfc/farch.c b/drivers/net/ethernet/sfc/farch.c index e004524e14a8..d75cf5ff5686 100644 --- a/drivers/net/ethernet/sfc/farch.c +++ b/drivers/net/ethernet/sfc/farch.c @@ -372,6 +372,8 @@ int efx_farch_tx_probe(struct efx_tx_queue *tx_queue) struct efx_nic *efx = tx_queue->efx; unsigned entries; + tx_queue->type = ((tx_queue->label & 1) ? EFX_TXQ_TYPE_OUTER_CSUM : 0) | + ((tx_queue->label & 2) ? EFX_TXQ_TYPE_HIGHPRI : 0); entries = tx_queue->ptr_mask + 1; return efx_alloc_special_buffer(efx, &tx_queue->txd, entries * sizeof(efx_qword_t)); @@ -379,7 +381,7 @@ int efx_farch_tx_probe(struct efx_tx_queue *tx_queue) void efx_farch_tx_init(struct efx_tx_queue *tx_queue) { - int csum = tx_queue->label & EFX_TXQ_TYPE_OFFLOAD; + int csum = tx_queue->type & EFX_TXQ_TYPE_OUTER_CSUM; struct efx_nic *efx = tx_queue->efx; efx_oword_t reg; @@ -409,10 +411,12 @@ void efx_farch_tx_init(struct efx_tx_queue *tx_queue) EFX_POPULATE_OWORD_1(reg, FRF_BZ_TX_PACE, - (tx_queue->label & EFX_TXQ_TYPE_HIGHPRI) ? + (tx_queue->type & EFX_TXQ_TYPE_HIGHPRI) ? FFE_BZ_TX_PACE_OFF : FFE_BZ_TX_PACE_RESERVED); efx_writeo_table(efx, ®, FR_BZ_TX_PACE_TBL, tx_queue->queue); + + tx_queue->tso_version = 1; } static void efx_farch_flush_tx_queue(struct efx_tx_queue *tx_queue) @@ -832,13 +836,13 @@ efx_farch_handle_tx_event(struct efx_channel *channel, efx_qword_t *event) tx_ev_desc_ptr = EFX_QWORD_FIELD(*event, FSF_AZ_TX_EV_DESC_PTR); tx_ev_q_label = EFX_QWORD_FIELD(*event, FSF_AZ_TX_EV_Q_LABEL); tx_queue = efx_channel_get_tx_queue( - channel, tx_ev_q_label % EFX_TXQ_TYPES); + channel, tx_ev_q_label % EFX_MAX_TXQ_PER_CHANNEL); efx_xmit_done(tx_queue, tx_ev_desc_ptr); } else if (EFX_QWORD_FIELD(*event, FSF_AZ_TX_EV_WQ_FF_FULL)) { /* Rewrite the FIFO write pointer */ tx_ev_q_label = EFX_QWORD_FIELD(*event, FSF_AZ_TX_EV_Q_LABEL); tx_queue = efx_channel_get_tx_queue( - channel, tx_ev_q_label % EFX_TXQ_TYPES); + channel, tx_ev_q_label % EFX_MAX_TXQ_PER_CHANNEL); netif_tx_lock(efx->net_dev); efx_farch_notify_tx_desc(tx_queue); @@ -1080,9 +1084,9 @@ efx_farch_handle_tx_flush_done(struct efx_nic *efx, efx_qword_t *event) int qid; qid = EFX_QWORD_FIELD(*event, FSF_AZ_DRIVER_EV_SUBDATA); - if (qid < EFX_TXQ_TYPES * (efx->n_tx_channels + efx->n_extra_tx_channels)) { - tx_queue = efx_get_tx_queue(efx, qid / EFX_TXQ_TYPES, - qid % EFX_TXQ_TYPES); + if (qid < EFX_MAX_TXQ_PER_CHANNEL * (efx->n_tx_channels + efx->n_extra_tx_channels)) { + tx_queue = efx_get_tx_queue(efx, qid / EFX_MAX_TXQ_PER_CHANNEL, + qid % EFX_MAX_TXQ_PER_CHANNEL); if (atomic_cmpxchg(&tx_queue->flush_outstanding, 1, 0)) { efx_farch_magic_event(tx_queue->channel, EFX_CHANNEL_MAGIC_TX_DRAIN(tx_queue)); @@ -1675,10 +1679,10 @@ void efx_farch_dimension_resources(struct efx_nic *efx, unsigned sram_lim_qw) * and the descriptor caches for those channels. */ buftbl_min = ((efx->n_rx_channels * EFX_MAX_DMAQ_SIZE + - total_tx_channels * EFX_TXQ_TYPES * EFX_MAX_DMAQ_SIZE + + total_tx_channels * EFX_MAX_TXQ_PER_CHANNEL * EFX_MAX_DMAQ_SIZE + efx->n_channels * EFX_MAX_EVQ_SIZE) * sizeof(efx_qword_t) / EFX_BUF_SIZE); - vi_count = max(efx->n_channels, total_tx_channels * EFX_TXQ_TYPES); + vi_count = max(efx->n_channels, total_tx_channels * EFX_MAX_TXQ_PER_CHANNEL); #ifdef CONFIG_SFC_SRIOV if (efx->type->sriov_wanted) { diff --git a/drivers/net/ethernet/sfc/mcdi_functions.c b/drivers/net/ethernet/sfc/mcdi_functions.c index d8a3af86ef78..d3e6d8239f5c 100644 --- a/drivers/net/ethernet/sfc/mcdi_functions.c +++ b/drivers/net/ethernet/sfc/mcdi_functions.c @@ -160,11 +160,12 @@ fail: outbuf, outlen, rc); } -int efx_mcdi_tx_init(struct efx_tx_queue *tx_queue, bool tso_v2) +int efx_mcdi_tx_init(struct efx_tx_queue *tx_queue) { MCDI_DECLARE_BUF(inbuf, MC_CMD_INIT_TXQ_IN_LEN(EFX_MAX_DMAQ_SIZE * 8 / EFX_BUF_SIZE)); - bool csum_offload = tx_queue->label & EFX_TXQ_TYPE_OFFLOAD; + bool csum_offload = tx_queue->type & EFX_TXQ_TYPE_OUTER_CSUM; + bool inner_csum = tx_queue->type & EFX_TXQ_TYPE_INNER_CSUM; size_t entries = tx_queue->txd.buf.len / EFX_BUF_SIZE; struct efx_channel *channel = tx_queue->channel; struct efx_nic *efx = tx_queue->efx; @@ -194,22 +195,31 @@ int efx_mcdi_tx_init(struct efx_tx_queue *tx_queue, bool tso_v2) inlen = MC_CMD_INIT_TXQ_IN_LEN(entries); do { - MCDI_POPULATE_DWORD_4(inbuf, INIT_TXQ_IN_FLAGS, + bool tso_v2 = tx_queue->tso_version == 2; + + /* TSOv2 implies IP header checksum offload for TSO frames, + * so we can safely disable IP header checksum offload for + * everything else. If we don't have TSOv2, then we have to + * enable IP header checksum offload, which is strictly + * incorrect but better than breaking TSO. + */ + MCDI_POPULATE_DWORD_6(inbuf, INIT_TXQ_IN_FLAGS, /* This flag was removed from mcdi_pcol.h for * the non-_EXT version of INIT_TXQ. However, * firmware still honours it. */ INIT_TXQ_EXT_IN_FLAG_TSOV2_EN, tso_v2, - INIT_TXQ_IN_FLAG_IP_CSUM_DIS, !csum_offload, + INIT_TXQ_IN_FLAG_IP_CSUM_DIS, !(csum_offload && tso_v2), INIT_TXQ_IN_FLAG_TCP_CSUM_DIS, !csum_offload, - INIT_TXQ_EXT_IN_FLAG_TIMESTAMP, - tx_queue->timestamping); + INIT_TXQ_EXT_IN_FLAG_TIMESTAMP, tx_queue->timestamping, + INIT_TXQ_IN_FLAG_INNER_IP_CSUM_EN, inner_csum && !tso_v2, + INIT_TXQ_IN_FLAG_INNER_TCP_CSUM_EN, inner_csum); rc = efx_mcdi_rpc_quiet(efx, MC_CMD_INIT_TXQ, inbuf, inlen, NULL, 0, NULL); if (rc == -ENOSPC && tso_v2) { /* Retry without TSOv2 if we're short on contexts. */ - tso_v2 = false; + tx_queue->tso_version = 0; netif_warn(efx, probe, efx->net_dev, "TSOv2 context not available to segment in " "hardware. TCP performance may be reduced.\n" diff --git a/drivers/net/ethernet/sfc/mcdi_functions.h b/drivers/net/ethernet/sfc/mcdi_functions.h index 687be8b00cd8..b0e2f53a0d9b 100644 --- a/drivers/net/ethernet/sfc/mcdi_functions.h +++ b/drivers/net/ethernet/sfc/mcdi_functions.h @@ -19,7 +19,7 @@ int efx_mcdi_ev_probe(struct efx_channel *channel); int efx_mcdi_ev_init(struct efx_channel *channel, bool v1_cut_thru, bool v2); void efx_mcdi_ev_remove(struct efx_channel *channel); void efx_mcdi_ev_fini(struct efx_channel *channel); -int efx_mcdi_tx_init(struct efx_tx_queue *tx_queue, bool tso_v2); +int efx_mcdi_tx_init(struct efx_tx_queue *tx_queue); void efx_mcdi_tx_remove(struct efx_tx_queue *tx_queue); void efx_mcdi_tx_fini(struct efx_tx_queue *tx_queue); int efx_mcdi_rx_probe(struct efx_rx_queue *rx_queue); diff --git a/drivers/net/ethernet/sfc/net_driver.h b/drivers/net/ethernet/sfc/net_driver.h index 3fd0b59107d1..a4c0445a3e88 100644 --- a/drivers/net/ethernet/sfc/net_driver.h +++ b/drivers/net/ethernet/sfc/net_driver.h @@ -63,10 +63,13 @@ * queues. */ #define EFX_MAX_TX_TC 2 #define EFX_MAX_CORE_TX_QUEUES (EFX_MAX_TX_TC * EFX_MAX_CHANNELS) -#define EFX_TXQ_TYPE_OFFLOAD 1 /* flag */ -#define EFX_TXQ_TYPE_HIGHPRI 2 /* flag */ -#define EFX_TXQ_TYPES 4 -#define EFX_MAX_TX_QUEUES (EFX_TXQ_TYPES * EFX_MAX_CHANNELS) +#define EFX_TXQ_TYPE_OUTER_CSUM 1 /* Outer checksum offload */ +#define EFX_TXQ_TYPE_INNER_CSUM 2 /* Inner checksum offload */ +#define EFX_TXQ_TYPE_HIGHPRI 4 /* High-priority (for TC) */ +#define EFX_TXQ_TYPES 8 +/* HIGHPRI is Siena-only, and INNER_CSUM is EF10, so no need for both */ +#define EFX_MAX_TXQ_PER_CHANNEL 4 +#define EFX_MAX_TX_QUEUES (EFX_MAX_TXQ_PER_CHANNEL * EFX_MAX_CHANNELS) /* Maximum possible MTU the driver supports */ #define EFX_MAX_MTU (9 * 1024) @@ -74,6 +77,9 @@ /* Minimum MTU, from RFC791 (IP) */ #define EFX_MIN_MTU 68 +/* Maximum total header length for TSOv2 */ +#define EFX_TSO2_MAX_HDRLEN 208 + /* Size of an RX scatter buffer. Small enough to pack 2 into a 4K page, * and should be a multiple of the cache line size. */ @@ -190,7 +196,9 @@ struct efx_tx_buffer { * @queue: DMA queue number * @label: Label for TX completion events. * Is our index within @channel->tx_queue array. + * @type: configuration type of this TX queue. A bitmask of %EFX_TXQ_TYPE_* flags. * @tso_version: Version of TSO in use for this queue. + * @tso_encap: Is encapsulated TSO supported? Supported in TSOv2 on 8000 series. * @channel: The associated channel * @core_txq: The networking core TX queue structure * @buffer: The software buffer ring @@ -204,8 +212,6 @@ struct efx_tx_buffer { * @initialised: Has hardware queue been initialised? * @timestamping: Is timestamping enabled for this channel? * @xdp_tx: Is this an XDP tx queue? - * @handle_tso: TSO xmit preparation handler. Sets up the TSO metadata and - * may also map tx data, depending on the nature of the TSO implementation. * @read_count: Current read pointer. * This is the number of buffers that have been removed from both rings. * @old_write_count: The value of @write_count when last checked. @@ -254,7 +260,9 @@ struct efx_tx_queue { struct efx_nic *efx ____cacheline_aligned_in_smp; unsigned int queue; unsigned int label; + unsigned int type; unsigned int tso_version; + bool tso_encap; struct efx_channel *channel; struct netdev_queue *core_txq; struct efx_tx_buffer *buffer; @@ -267,9 +275,6 @@ struct efx_tx_queue { bool timestamping; bool xdp_tx; - /* Function pointers used in the fast path. */ - int (*handle_tso)(struct efx_tx_queue*, struct sk_buff*, bool *); - /* Members used mainly on the completion path */ unsigned int read_count ____cacheline_aligned_in_smp; unsigned int old_write_count; @@ -479,6 +484,7 @@ enum efx_sync_events_state { * @rx_list: list of SKBs from current RX, awaiting processing * @rx_queue: RX queue for this channel * @tx_queue: TX queues for this channel + * @tx_queue_by_type: pointers into @tx_queue, or %NULL, indexed by txq type * @sync_events_state: Current state of sync events on this channel * @sync_timestamp_major: Major part of the last ptp sync event * @sync_timestamp_minor: Minor part of the last ptp sync event @@ -540,7 +546,8 @@ struct efx_channel { struct list_head *rx_list; struct efx_rx_queue rx_queue; - struct efx_tx_queue tx_queue[EFX_TXQ_TYPES]; + struct efx_tx_queue tx_queue[EFX_MAX_TXQ_PER_CHANNEL]; + struct efx_tx_queue *tx_queue_by_type[EFX_TXQ_TYPES]; enum efx_sync_events_state sync_events_state; u32 sync_timestamp_major; @@ -1200,7 +1207,7 @@ struct efx_udp_tunnel { * a pointer to the &struct efx_msi_context for the channel. * @irq_handle_legacy: Handle legacy interrupt. The @dev_id argument * is a pointer to the &struct efx_nic. - * @tx_probe: Allocate resources for TX queue + * @tx_probe: Allocate resources for TX queue (and select TXQ type) * @tx_init: Initialise TX queue on the NIC * @tx_remove: Free resources for TX queue * @tx_write: Write TX descriptors and doorbell @@ -1495,14 +1502,6 @@ efx_get_tx_channel(struct efx_nic *efx, unsigned int index) return efx->channel[efx->tx_channel_offset + index]; } -static inline struct efx_tx_queue * -efx_get_tx_queue(struct efx_nic *efx, unsigned index, unsigned type) -{ - EFX_WARN_ON_ONCE_PARANOID(index >= efx->n_tx_channels || - type >= efx->tx_queues_per_channel); - return &efx->channel[efx->tx_channel_offset + index]->tx_queue[type]; -} - static inline struct efx_channel * efx_get_xdp_channel(struct efx_nic *efx, unsigned int index) { @@ -1529,10 +1528,18 @@ static inline unsigned int efx_channel_num_tx_queues(struct efx_channel *channel } static inline struct efx_tx_queue * -efx_channel_get_tx_queue(struct efx_channel *channel, unsigned type) +efx_channel_get_tx_queue(struct efx_channel *channel, unsigned int type) { - EFX_WARN_ON_ONCE_PARANOID(type >= efx_channel_num_tx_queues(channel)); - return &channel->tx_queue[type]; + EFX_WARN_ON_ONCE_PARANOID(type >= EFX_TXQ_TYPES); + return channel->tx_queue_by_type[type]; +} + +static inline struct efx_tx_queue * +efx_get_tx_queue(struct efx_nic *efx, unsigned int index, unsigned int type) +{ + struct efx_channel *channel = efx_get_tx_channel(efx, index); + + return efx_channel_get_tx_queue(channel, type); } /* Iterate over all TX queues belonging to a channel */ diff --git a/drivers/net/ethernet/sfc/nic.h b/drivers/net/ethernet/sfc/nic.h index 724e2776b585..5c2fe3ce3f4d 100644 --- a/drivers/net/ethernet/sfc/nic.h +++ b/drivers/net/ethernet/sfc/nic.h @@ -297,6 +297,10 @@ struct efx_ef10_nic_data { u64 licensed_features; }; +/* TSOv2 */ +int efx_ef10_tx_tso_desc(struct efx_tx_queue *tx_queue, struct sk_buff *skb, + bool *data_mapped); + int efx_init_sriov(void); void efx_fini_sriov(void); diff --git a/drivers/net/ethernet/sfc/ptp.c b/drivers/net/ethernet/sfc/ptp.c index bea4725a4499..2e8c4569f03b 100644 --- a/drivers/net/ethernet/sfc/ptp.c +++ b/drivers/net/ethernet/sfc/ptp.c @@ -43,6 +43,7 @@ #include "mcdi_pcol.h" #include "io.h" #include "farch_regs.h" +#include "tx.h" #include "nic.h" /* indirectly includes ptp.h */ /* Maximum number of events expected to make up a PTP event */ @@ -1082,10 +1083,10 @@ static int efx_ptp_synchronize(struct efx_nic *efx, unsigned int num_readings) static void efx_ptp_xmit_skb_queue(struct efx_nic *efx, struct sk_buff *skb) { struct efx_ptp_data *ptp_data = efx->ptp_data; + u8 type = efx_tx_csum_type_skb(skb); struct efx_tx_queue *tx_queue; - u8 type = skb->ip_summed == CHECKSUM_PARTIAL ? EFX_TXQ_TYPE_OFFLOAD : 0; - tx_queue = &ptp_data->channel->tx_queue[type]; + tx_queue = efx_channel_get_tx_queue(ptp_data->channel, type); if (tx_queue && tx_queue->timestamping) { efx_enqueue_skb(tx_queue, skb); } else { diff --git a/drivers/net/ethernet/sfc/selftest.c b/drivers/net/ethernet/sfc/selftest.c index 574856a8a83c..3c5227afd497 100644 --- a/drivers/net/ethernet/sfc/selftest.c +++ b/drivers/net/ethernet/sfc/selftest.c @@ -656,8 +656,8 @@ static int efx_test_loopbacks(struct efx_nic *efx, struct efx_self_tests *tests, /* Test all enabled types of TX queue */ efx_for_each_channel_tx_queue(tx_queue, channel) { - state->offload_csum = (tx_queue->label & - EFX_TXQ_TYPE_OFFLOAD); + state->offload_csum = (tx_queue->type & + EFX_TXQ_TYPE_OUTER_CSUM); rc = efx_test_loopback(tx_queue, &tests->loopback[mode]); if (rc) diff --git a/drivers/net/ethernet/sfc/selftest.h b/drivers/net/ethernet/sfc/selftest.h index ca88ebb4f6b1..a23f085bf298 100644 --- a/drivers/net/ethernet/sfc/selftest.h +++ b/drivers/net/ethernet/sfc/selftest.h @@ -15,8 +15,8 @@ */ struct efx_loopback_self_tests { - int tx_sent[EFX_TXQ_TYPES]; - int tx_done[EFX_TXQ_TYPES]; + int tx_sent[EFX_MAX_TXQ_PER_CHANNEL]; + int tx_done[EFX_MAX_TXQ_PER_CHANNEL]; int rx_good; int rx_bad; }; diff --git a/drivers/net/ethernet/sfc/tx.c b/drivers/net/ethernet/sfc/tx.c index 48d91b26f1a2..1665529a7271 100644 --- a/drivers/net/ethernet/sfc/tx.c +++ b/drivers/net/ethernet/sfc/tx.c @@ -338,8 +338,18 @@ netdev_tx_t __efx_enqueue_skb(struct efx_tx_queue *tx_queue, struct sk_buff *skb * size limit. */ if (segments) { - EFX_WARN_ON_ONCE_PARANOID(!tx_queue->handle_tso); - rc = tx_queue->handle_tso(tx_queue, skb, &data_mapped); + switch (tx_queue->tso_version) { + case 1: + rc = efx_enqueue_skb_tso(tx_queue, skb, &data_mapped); + break; + case 2: + rc = efx_ef10_tx_tso_desc(tx_queue, skb, &data_mapped); + break; + case 0: /* No TSO on this queue, SW fallback needed */ + default: + rc = -EINVAL; + break; + } if (rc == -EINVAL) { rc = efx_tx_tso_fallback(tx_queue, skb); tx_queue->tso_fallbacks++; @@ -491,13 +501,10 @@ int efx_xdp_tx_buffers(struct efx_nic *efx, int n, struct xdp_frame **xdpfs, } /* Initiate a packet transmission. We use one channel per CPU - * (sharing when we have more CPUs than channels). On Falcon, the TX - * completion events will be directed back to the CPU that transmitted - * the packet, which should be cache-efficient. + * (sharing when we have more CPUs than channels). * * Context: non-blocking. - * Note that returning anything other than NETDEV_TX_OK will cause the - * OS to free the skb. + * Should always return NETDEV_TX_OK and consume the skb. */ netdev_tx_t efx_hard_start_xmit(struct sk_buff *skb, struct net_device *net_dev) @@ -509,7 +516,7 @@ netdev_tx_t efx_hard_start_xmit(struct sk_buff *skb, EFX_WARN_ON_PARANOID(!netif_device_present(net_dev)); index = skb_get_queue_mapping(skb); - type = skb->ip_summed == CHECKSUM_PARTIAL ? EFX_TXQ_TYPE_OFFLOAD : 0; + type = efx_tx_csum_type_skb(skb); if (index >= efx->n_tx_channels) { index -= efx->n_tx_channels; type |= EFX_TXQ_TYPE_HIGHPRI; @@ -527,6 +534,20 @@ netdev_tx_t efx_hard_start_xmit(struct sk_buff *skb, } tx_queue = efx_get_tx_queue(efx, index, type); + if (WARN_ON_ONCE(!tx_queue)) { + /* We don't have a TXQ of the right type. + * This should never happen, as we don't advertise offload + * features unless we can support them. + */ + dev_kfree_skb_any(skb); + /* If we're not expecting another transmit and we had something to push + * on this queue or a partner queue then we need to push here to get the + * previous packets out. + */ + if (!netdev_xmit_more()) + efx_tx_send_pending(tx_queue->channel); + return NETDEV_TX_OK; + } return __efx_enqueue_skb(tx_queue, skb); } @@ -577,7 +598,7 @@ void efx_init_tx_queue_core_txq(struct efx_tx_queue *tx_queue) tx_queue->core_txq = netdev_get_tx_queue(efx->net_dev, tx_queue->channel->channel + - ((tx_queue->label & EFX_TXQ_TYPE_HIGHPRI) ? + ((tx_queue->type & EFX_TXQ_TYPE_HIGHPRI) ? efx->n_tx_channels : 0)); } diff --git a/drivers/net/ethernet/sfc/tx.h b/drivers/net/ethernet/sfc/tx.h index a3cf06c5570d..f2c4d2f89919 100644 --- a/drivers/net/ethernet/sfc/tx.h +++ b/drivers/net/ethernet/sfc/tx.h @@ -18,4 +18,30 @@ unsigned int efx_tx_limit_len(struct efx_tx_queue *tx_queue, u8 *efx_tx_get_copy_buffer_limited(struct efx_tx_queue *tx_queue, struct efx_tx_buffer *buffer, size_t len); +/* What TXQ type will satisfy the checksum offloads required for this skb? */ +static inline unsigned int efx_tx_csum_type_skb(struct sk_buff *skb) +{ + if (skb->ip_summed != CHECKSUM_PARTIAL) + return 0; /* no checksum offload */ + + if (skb->encapsulation && + skb_checksum_start_offset(skb) == skb_inner_transport_offset(skb)) { + /* we only advertise features for IPv4 and IPv6 checksums on + * encapsulated packets, so if the checksum is for the inner + * packet, it must be one of them; no further checking required. + */ + + /* Do we also need to offload the outer header checksum? */ + if (skb_shinfo(skb)->gso_segs > 1 && + !(skb_shinfo(skb)->gso_type & SKB_GSO_PARTIAL) && + (skb_shinfo(skb)->gso_type & SKB_GSO_UDP_TUNNEL_CSUM)) + return EFX_TXQ_TYPE_OUTER_CSUM | EFX_TXQ_TYPE_INNER_CSUM; + return EFX_TXQ_TYPE_INNER_CSUM; + } + + /* similarly, we only advertise features for IPv4 and IPv6 checksums, + * so it must be one of them. No need for further checks. + */ + return EFX_TXQ_TYPE_OUTER_CSUM; +} #endif /* EFX_TX_H */ diff --git a/drivers/net/ethernet/sfc/tx_common.c b/drivers/net/ethernet/sfc/tx_common.c index f2dac83beb7d..d530cde2b864 100644 --- a/drivers/net/ethernet/sfc/tx_common.c +++ b/drivers/net/ethernet/sfc/tx_common.c @@ -47,11 +47,12 @@ int efx_probe_tx_queue(struct efx_tx_queue *tx_queue) goto fail1; } - /* Allocate hardware ring */ + /* Allocate hardware ring, determine TXQ type */ rc = efx_nic_probe_tx(tx_queue); if (rc) goto fail2; + tx_queue->channel->tx_queue_by_type[tx_queue->type] = tx_queue; return 0; fail2: @@ -85,11 +86,7 @@ void efx_init_tx_queue(struct efx_tx_queue *tx_queue) tx_queue->completed_timestamp_minor = 0; tx_queue->xdp_tx = efx_channel_is_xdp_tx(tx_queue->channel); - - /* Set up default function pointers. These may get replaced by - * efx_nic_init_tx() based off NIC/queue capabilities. - */ - tx_queue->handle_tso = efx_enqueue_skb_tso; + tx_queue->tso_version = 0; /* Set up TX descriptor ring */ efx_nic_init_tx(tx_queue); @@ -141,6 +138,7 @@ void efx_remove_tx_queue(struct efx_tx_queue *tx_queue) kfree(tx_queue->buffer); tx_queue->buffer = NULL; + tx_queue->channel->tx_queue_by_type[tx_queue->type] = NULL; } void efx_dequeue_buffer(struct efx_tx_queue *tx_queue, |