diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2021-06-30 15:51:09 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-06-30 15:51:09 -0700 |
commit | dbe69e43372212527abf48609aba7fc39a6daa27 (patch) | |
tree | 96cfafdf70f5325ceeac1054daf7deca339c9730 /drivers/net/ethernet/google/gve/gve_desc_dqo.h | |
parent | a6eaf3850cb171c328a8b0db6d3c79286a1eba9d (diff) | |
parent | b6df00789e2831fff7a2c65aa7164b2a4dcbe599 (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_desc_dqo.h')
-rw-r--r-- | drivers/net/ethernet/google/gve/gve_desc_dqo.h | 256 |
1 files changed, 256 insertions, 0 deletions
diff --git a/drivers/net/ethernet/google/gve/gve_desc_dqo.h b/drivers/net/ethernet/google/gve/gve_desc_dqo.h new file mode 100644 index 000000000000..e8fe9adef7f2 --- /dev/null +++ b/drivers/net/ethernet/google/gve/gve_desc_dqo.h @@ -0,0 +1,256 @@ +/* SPDX-License-Identifier: (GPL-2.0 OR MIT) + * Google virtual Ethernet (gve) driver + * + * Copyright (C) 2015-2021 Google, Inc. + */ + +/* GVE DQO Descriptor formats */ + +#ifndef _GVE_DESC_DQO_H_ +#define _GVE_DESC_DQO_H_ + +#include <linux/build_bug.h> + +#define GVE_TX_MAX_HDR_SIZE_DQO 255 +#define GVE_TX_MIN_TSO_MSS_DQO 88 + +#ifndef __LITTLE_ENDIAN_BITFIELD +#error "Only little endian supported" +#endif + +/* Basic TX descriptor (DTYPE 0x0C) */ +struct gve_tx_pkt_desc_dqo { + __le64 buf_addr; + + /* Must be GVE_TX_PKT_DESC_DTYPE_DQO (0xc) */ + u8 dtype: 5; + + /* Denotes the last descriptor of a packet. */ + u8 end_of_packet: 1; + u8 checksum_offload_enable: 1; + + /* If set, will generate a descriptor completion for this descriptor. */ + u8 report_event: 1; + u8 reserved0; + __le16 reserved1; + + /* The TX completion associated with this packet will contain this tag. + */ + __le16 compl_tag; + u16 buf_size: 14; + u16 reserved2: 2; +} __packed; +static_assert(sizeof(struct gve_tx_pkt_desc_dqo) == 16); + +#define GVE_TX_PKT_DESC_DTYPE_DQO 0xc +#define GVE_TX_MAX_BUF_SIZE_DQO ((16 * 1024) - 1) + +/* Maximum number of data descriptors allowed per packet, or per-TSO segment. */ +#define GVE_TX_MAX_DATA_DESCS 10 + +/* Min gap between tail and head to avoid cacheline overlap */ +#define GVE_TX_MIN_DESC_PREVENT_CACHE_OVERLAP 4 + +/* "report_event" on TX packet descriptors may only be reported on the last + * descriptor of a TX packet, and they must be spaced apart with at least this + * value. + */ +#define GVE_TX_MIN_RE_INTERVAL 32 + +struct gve_tx_context_cmd_dtype { + u8 dtype: 5; + u8 tso: 1; + u8 reserved1: 2; + + u8 reserved2; +}; + +static_assert(sizeof(struct gve_tx_context_cmd_dtype) == 2); + +/* TX Native TSO Context DTYPE (0x05) + * + * "flex" fields allow the driver to send additional packet context to HW. + */ +struct gve_tx_tso_context_desc_dqo { + /* The L4 payload bytes that should be segmented. */ + u32 tso_total_len: 24; + u32 flex10: 8; + + /* Max segment size in TSO excluding headers. */ + u16 mss: 14; + u16 reserved: 2; + + u8 header_len; /* Header length to use for TSO offload */ + u8 flex11; + struct gve_tx_context_cmd_dtype cmd_dtype; + u8 flex0; + u8 flex5; + u8 flex6; + u8 flex7; + u8 flex8; + u8 flex9; +} __packed; +static_assert(sizeof(struct gve_tx_tso_context_desc_dqo) == 16); + +#define GVE_TX_TSO_CTX_DESC_DTYPE_DQO 0x5 + +/* General context descriptor for sending metadata. */ +struct gve_tx_general_context_desc_dqo { + u8 flex4; + u8 flex5; + u8 flex6; + u8 flex7; + u8 flex8; + u8 flex9; + u8 flex10; + u8 flex11; + struct gve_tx_context_cmd_dtype cmd_dtype; + u16 reserved; + u8 flex0; + u8 flex1; + u8 flex2; + u8 flex3; +} __packed; +static_assert(sizeof(struct gve_tx_general_context_desc_dqo) == 16); + +#define GVE_TX_GENERAL_CTX_DESC_DTYPE_DQO 0x4 + +/* Logical structure of metadata which is packed into context descriptor flex + * fields. + */ +struct gve_tx_metadata_dqo { + union { + struct { + u8 version; + + /* If `skb->l4_hash` is set, this value should be + * derived from `skb->hash`. + * + * A zero value means no l4_hash was associated with the + * skb. + */ + u16 path_hash: 15; + + /* Should be set to 1 if the flow associated with the + * skb had a rehash from the TCP stack. + */ + u16 rehash_event: 1; + } __packed; + u8 bytes[12]; + }; +} __packed; +static_assert(sizeof(struct gve_tx_metadata_dqo) == 12); + +#define GVE_TX_METADATA_VERSION_DQO 0 + +/* TX completion descriptor */ +struct gve_tx_compl_desc { + /* For types 0-4 this is the TX queue ID associated with this + * completion. + */ + u16 id: 11; + + /* See: GVE_COMPL_TYPE_DQO* */ + u16 type: 3; + u16 reserved0: 1; + + /* Flipped by HW to notify the descriptor is populated. */ + u16 generation: 1; + union { + /* For descriptor completions, this is the last index fetched + * by HW + 1. + */ + __le16 tx_head; + + /* For packet completions, this is the completion tag set on the + * TX packet descriptors. + */ + __le16 completion_tag; + }; + __le32 reserved1; +} __packed; +static_assert(sizeof(struct gve_tx_compl_desc) == 8); + +#define GVE_COMPL_TYPE_DQO_PKT 0x2 /* Packet completion */ +#define GVE_COMPL_TYPE_DQO_DESC 0x4 /* Descriptor completion */ +#define GVE_COMPL_TYPE_DQO_MISS 0x1 /* Miss path completion */ +#define GVE_COMPL_TYPE_DQO_REINJECTION 0x3 /* Re-injection completion */ + +/* Descriptor to post buffers to HW on buffer queue. */ +struct gve_rx_desc_dqo { + __le16 buf_id; /* ID returned in Rx completion descriptor */ + __le16 reserved0; + __le32 reserved1; + __le64 buf_addr; /* DMA address of the buffer */ + __le64 header_buf_addr; + __le64 reserved2; +} __packed; +static_assert(sizeof(struct gve_rx_desc_dqo) == 32); + +/* Descriptor for HW to notify SW of new packets received on RX queue. */ +struct gve_rx_compl_desc_dqo { + /* Must be 1 */ + u8 rxdid: 4; + u8 reserved0: 4; + + /* Packet originated from this system rather than the network. */ + u8 loopback: 1; + /* Set when IPv6 packet contains a destination options header or routing + * header. + */ + u8 ipv6_ex_add: 1; + /* Invalid packet was received. */ + u8 rx_error: 1; + u8 reserved1: 5; + + u16 packet_type: 10; + u16 ip_hdr_err: 1; + u16 udp_len_err: 1; + u16 raw_cs_invalid: 1; + u16 reserved2: 3; + + u16 packet_len: 14; + /* Flipped by HW to notify the descriptor is populated. */ + u16 generation: 1; + /* Should be zero. */ + u16 buffer_queue_id: 1; + + u16 header_len: 10; + u16 rsc: 1; + u16 split_header: 1; + u16 reserved3: 4; + + u8 descriptor_done: 1; + u8 end_of_packet: 1; + u8 header_buffer_overflow: 1; + u8 l3_l4_processed: 1; + u8 csum_ip_err: 1; + u8 csum_l4_err: 1; + u8 csum_external_ip_err: 1; + u8 csum_external_udp_err: 1; + + u8 status_error1; + + __le16 reserved5; + __le16 buf_id; /* Buffer ID which was sent on the buffer queue. */ + + union { + /* Packet checksum. */ + __le16 raw_cs; + /* Segment length for RSC packets. */ + __le16 rsc_seg_len; + }; + __le32 hash; + __le32 reserved6; + __le64 reserved7; +} __packed; + +static_assert(sizeof(struct gve_rx_compl_desc_dqo) == 32); + +/* Ringing the doorbell too often can hurt performance. + * + * HW requires this value to be at least 8. + */ +#define GVE_RX_BUF_THRESH_DQO 32 + +#endif /* _GVE_DESC_DQO_H_ */ |