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authorLinus Torvalds <torvalds@linux-foundation.org>2021-06-30 15:51:09 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2021-06-30 15:51:09 -0700
commitdbe69e43372212527abf48609aba7fc39a6daa27 (patch)
tree96cfafdf70f5325ceeac1054daf7deca339c9730 /drivers/net/ethernet/google/gve/gve_utils.c
parenta6eaf3850cb171c328a8b0db6d3c79286a1eba9d (diff)
parentb6df00789e2831fff7a2c65aa7164b2a4dcbe599 (diff)
Merge tag 'net-next-5.14' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next
Pull networking updates from Jakub Kicinski: "Core: - BPF: - add syscall program type and libbpf support for generating instructions and bindings for in-kernel BPF loaders (BPF loaders for BPF), this is a stepping stone for signed BPF programs - infrastructure to migrate TCP child sockets from one listener to another in the same reuseport group/map to improve flexibility of service hand-off/restart - add broadcast support to XDP redirect - allow bypass of the lockless qdisc to improving performance (for pktgen: +23% with one thread, +44% with 2 threads) - add a simpler version of "DO_ONCE()" which does not require jump labels, intended for slow-path usage - virtio/vsock: introduce SOCK_SEQPACKET support - add getsocketopt to retrieve netns cookie - ip: treat lowest address of a IPv4 subnet as ordinary unicast address allowing reclaiming of precious IPv4 addresses - ipv6: use prandom_u32() for ID generation - ip: add support for more flexible field selection for hashing across multi-path routes (w/ offload to mlxsw) - icmp: add support for extended RFC 8335 PROBE (ping) - seg6: add support for SRv6 End.DT46 behavior - mptcp: - DSS checksum support (RFC 8684) to detect middlebox meddling - support Connection-time 'C' flag - time stamping support - sctp: packetization Layer Path MTU Discovery (RFC 8899) - xfrm: speed up state addition with seq set - WiFi: - hidden AP discovery on 6 GHz and other HE 6 GHz improvements - aggregation handling improvements for some drivers - minstrel improvements for no-ack frames - deferred rate control for TXQs to improve reaction times - switch from round robin to virtual time-based airtime scheduler - add trace points: - tcp checksum errors - openvswitch - action execution, upcalls - socket errors via sk_error_report Device APIs: - devlink: add rate API for hierarchical control of max egress rate of virtual devices (VFs, SFs etc.) - don't require RCU read lock to be held around BPF hooks in NAPI context - page_pool: generic buffer recycling New hardware/drivers: - mobile: - iosm: PCIe Driver for Intel M.2 Modem - support for Qualcomm MSM8998 (ipa) - WiFi: Qualcomm QCN9074 and WCN6855 PCI devices - sparx5: Microchip SparX-5 family of Enterprise Ethernet switches - Mellanox BlueField Gigabit Ethernet (control NIC of the DPU) - NXP SJA1110 Automotive Ethernet 10-port switch - Qualcomm QCA8327 switch support (qca8k) - Mikrotik 10/25G NIC (atl1c) Driver changes: - ACPI support for some MDIO, MAC and PHY devices from Marvell and NXP (our first foray into MAC/PHY description via ACPI) - HW timestamping (PTP) support: bnxt_en, ice, sja1105, hns3, tja11xx - Mellanox/Nvidia NIC (mlx5) - NIC VF offload of L2 bridging - support IRQ distribution to Sub-functions - Marvell (prestera): - add flower and match all - devlink trap - link aggregation - Netronome (nfp): connection tracking offload - Intel 1GE (igc): add AF_XDP support - Marvell DPU (octeontx2): ingress ratelimit offload - Google vNIC (gve): new ring/descriptor format support - Qualcomm mobile (rmnet & ipa): inline checksum offload support - MediaTek WiFi (mt76) - mt7915 MSI support - mt7915 Tx status reporting - mt7915 thermal sensors support - mt7921 decapsulation offload - mt7921 enable runtime pm and deep sleep - Realtek WiFi (rtw88) - beacon filter support - Tx antenna path diversity support - firmware crash information via devcoredump - Qualcomm WiFi (wcn36xx) - Wake-on-WLAN support with magic packets and GTK rekeying - Micrel PHY (ksz886x/ksz8081): add cable test support" * tag 'net-next-5.14' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (2168 commits) tcp: change ICSK_CA_PRIV_SIZE definition tcp_yeah: check struct yeah size at compile time gve: DQO: Fix off by one in gve_rx_dqo() stmmac: intel: set PCI_D3hot in suspend stmmac: intel: Enable PHY WOL option in EHL net: stmmac: option to enable PHY WOL with PMT enabled net: say "local" instead of "static" addresses in ndo_dflt_fdb_{add,del} net: use netdev_info in ndo_dflt_fdb_{add,del} ptp: Set lookup cookie when creating a PTP PPS source. net: sock: add trace for socket errors net: sock: introduce sk_error_report net: dsa: replay the local bridge FDB entries pointing to the bridge dev too net: dsa: ensure during dsa_fdb_offload_notify that dev_hold and dev_put are on the same dev net: dsa: include fdb entries pointing to bridge in the host fdb list net: dsa: include bridge addresses which are local in the host fdb list net: dsa: sync static FDB entries on foreign interfaces to hardware net: dsa: install the host MDB and FDB entries in the master's RX filter net: dsa: reference count the FDB addresses at the cross-chip notifier level net: dsa: introduce a separate cross-chip notifier type for host FDBs net: dsa: reference count the MDB entries at the cross-chip notifier level ...
Diffstat (limited to 'drivers/net/ethernet/google/gve/gve_utils.c')
-rw-r--r--drivers/net/ethernet/google/gve/gve_utils.c81
1 files changed, 81 insertions, 0 deletions
diff --git a/drivers/net/ethernet/google/gve/gve_utils.c b/drivers/net/ethernet/google/gve/gve_utils.c
new file mode 100644
index 000000000000..93f3dcbeeea9
--- /dev/null
+++ b/drivers/net/ethernet/google/gve/gve_utils.c
@@ -0,0 +1,81 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+/* Google virtual Ethernet (gve) driver
+ *
+ * Copyright (C) 2015-2021 Google, Inc.
+ */
+
+#include "gve.h"
+#include "gve_adminq.h"
+#include "gve_utils.h"
+
+void gve_tx_remove_from_block(struct gve_priv *priv, int queue_idx)
+{
+ struct gve_notify_block *block =
+ &priv->ntfy_blocks[gve_tx_idx_to_ntfy(priv, queue_idx)];
+
+ block->tx = NULL;
+}
+
+void gve_tx_add_to_block(struct gve_priv *priv, int queue_idx)
+{
+ int ntfy_idx = gve_tx_idx_to_ntfy(priv, queue_idx);
+ struct gve_notify_block *block = &priv->ntfy_blocks[ntfy_idx];
+ struct gve_tx_ring *tx = &priv->tx[queue_idx];
+
+ block->tx = tx;
+ tx->ntfy_id = ntfy_idx;
+}
+
+void gve_rx_remove_from_block(struct gve_priv *priv, int queue_idx)
+{
+ struct gve_notify_block *block =
+ &priv->ntfy_blocks[gve_rx_idx_to_ntfy(priv, queue_idx)];
+
+ block->rx = NULL;
+}
+
+void gve_rx_add_to_block(struct gve_priv *priv, int queue_idx)
+{
+ u32 ntfy_idx = gve_rx_idx_to_ntfy(priv, queue_idx);
+ struct gve_notify_block *block = &priv->ntfy_blocks[ntfy_idx];
+ struct gve_rx_ring *rx = &priv->rx[queue_idx];
+
+ block->rx = rx;
+ rx->ntfy_id = ntfy_idx;
+}
+
+struct sk_buff *gve_rx_copy(struct net_device *dev, struct napi_struct *napi,
+ struct gve_rx_slot_page_info *page_info, u16 len,
+ u16 pad)
+{
+ struct sk_buff *skb = napi_alloc_skb(napi, len);
+ void *va = page_info->page_address + pad +
+ page_info->page_offset;
+
+ if (unlikely(!skb))
+ return NULL;
+
+ __skb_put(skb, len);
+
+ skb_copy_to_linear_data(skb, va, len);
+
+ skb->protocol = eth_type_trans(skb, dev);
+
+ return skb;
+}
+
+void gve_dec_pagecnt_bias(struct gve_rx_slot_page_info *page_info)
+{
+ page_info->pagecnt_bias--;
+ if (page_info->pagecnt_bias == 0) {
+ int pagecount = page_count(page_info->page);
+
+ /* If we have run out of bias - set it back up to INT_MAX
+ * minus the existing refs.
+ */
+ page_info->pagecnt_bias = INT_MAX - pagecount;
+
+ /* Set pagecount back up to max. */
+ page_ref_add(page_info->page, INT_MAX - pagecount);
+ }
+}