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author | 2023-02-21 18:24:12 -0800 | |
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committer | 2023-02-21 18:24:12 -0800 | |
commit | 5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 (patch) | |
tree | cc5c2d0a898769fd59549594fedb3ee6f84e59a0 /drivers/net/ethernet/cavium/liquidio/octeon_droq.h | |
download | linux-5b7c4cabbb65f5c469464da6c5f614cbd7f730f2.tar.gz linux-5b7c4cabbb65f5c469464da6c5f614cbd7f730f2.zip |
Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted
Pull networking updates from Jakub Kicinski:
"Core:
- Add dedicated kmem_cache for typical/small skb->head, avoid having
to access struct page at kfree time, and improve memory use.
- Introduce sysctl to set default RPS configuration for new netdevs.
- Define Netlink protocol specification format which can be used to
describe messages used by each family and auto-generate parsers.
Add tools for generating kernel data structures and uAPI headers.
- Expose all net/core sysctls inside netns.
- Remove 4s sleep in netpoll if carrier is instantly detected on
boot.
- Add configurable limit of MDB entries per port, and port-vlan.
- Continue populating drop reasons throughout the stack.
- Retire a handful of legacy Qdiscs and classifiers.
Protocols:
- Support IPv4 big TCP (TSO frames larger than 64kB).
- Add IP_LOCAL_PORT_RANGE socket option, to control local port range
on socket by socket basis.
- Track and report in procfs number of MPTCP sockets used.
- Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path
manager.
- IPv6: don't check net.ipv6.route.max_size and rely on garbage
collection to free memory (similarly to IPv4).
- Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986).
- ICMP: add per-rate limit counters.
- Add support for user scanning requests in ieee802154.
- Remove static WEP support.
- Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate
reporting.
- WiFi 7 EHT channel puncturing support (client & AP).
BPF:
- Add a rbtree data structure following the "next-gen data structure"
precedent set by recently added linked list, that is, by using
kfunc + kptr instead of adding a new BPF map type.
- Expose XDP hints via kfuncs with initial support for RX hash and
timestamp metadata.
- Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to
better support decap on GRE tunnel devices not operating in collect
metadata.
- Improve x86 JIT's codegen for PROBE_MEM runtime error checks.
- Remove the need for trace_printk_lock for bpf_trace_printk and
bpf_trace_vprintk helpers.
- Extend libbpf's bpf_tracing.h support for tracing arguments of
kprobes/uprobes and syscall as a special case.
- Significantly reduce the search time for module symbols by
livepatch and BPF.
- Enable cpumasks to be used as kptrs, which is useful for tracing
programs tracking which tasks end up running on which CPUs in
different time intervals.
- Add support for BPF trampoline on s390x and riscv64.
- Add capability to export the XDP features supported by the NIC.
- Add __bpf_kfunc tag for marking kernel functions as kfuncs.
- Add cgroup.memory=nobpf kernel parameter option to disable BPF
memory accounting for container environments.
Netfilter:
- Remove the CLUSTERIP target. It has been marked as obsolete for
years, and we still have WARN splats wrt races of the out-of-band
/proc interface installed by this target.
- Add 'destroy' commands to nf_tables. They are identical to the
existing 'delete' commands, but do not return an error if the
referenced object (set, chain, rule...) did not exist.
Driver API:
- Improve cpumask_local_spread() locality to help NICs set the right
IRQ affinity on AMD platforms.
- Separate C22 and C45 MDIO bus transactions more clearly.
- Introduce new DCB table to control DSCP rewrite on egress.
- Support configuration of Physical Layer Collision Avoidance (PLCA)
Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of
shared medium Ethernet.
- Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing
preemption of low priority frames by high priority frames.
- Add support for controlling MACSec offload using netlink SET.
- Rework devlink instance refcounts to allow registration and
de-registration under the instance lock. Split the code into
multiple files, drop some of the unnecessarily granular locks and
factor out common parts of netlink operation handling.
- Add TX frame aggregation parameters (for USB drivers).
- Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning
messages with notifications for debug.
- Allow offloading of UDP NEW connections via act_ct.
- Add support for per action HW stats in TC.
- Support hardware miss to TC action (continue processing in SW from
a specific point in the action chain).
- Warn if old Wireless Extension user space interface is used with
modern cfg80211/mac80211 drivers. Do not support Wireless
Extensions for Wi-Fi 7 devices at all. Everyone should switch to
using nl80211 interface instead.
- Improve the CAN bit timing configuration. Use extack to return
error messages directly to user space, update the SJW handling,
including the definition of a new default value that will benefit
CAN-FD controllers, by increasing their oscillator tolerance.
New hardware / drivers:
- Ethernet:
- nVidia BlueField-3 support (control traffic driver)
- Ethernet support for imx93 SoCs
- Motorcomm yt8531 gigabit Ethernet PHY
- onsemi NCN26000 10BASE-T1S PHY (with support for PLCA)
- Microchip LAN8841 PHY (incl. cable diagnostics and PTP)
- Amlogic gxl MDIO mux
- WiFi:
- RealTek RTL8188EU (rtl8xxxu)
- Qualcomm Wi-Fi 7 devices (ath12k)
- CAN:
- Renesas R-Car V4H
Drivers:
- Bluetooth:
- Set Per Platform Antenna Gain (PPAG) for Intel controllers.
- Ethernet NICs:
- Intel (1G, igc):
- support TSN / Qbv / packet scheduling features of i226 model
- Intel (100G, ice):
- use GNSS subsystem instead of TTY
- multi-buffer XDP support
- extend support for GPIO pins to E823 devices
- nVidia/Mellanox:
- update the shared buffer configuration on PFC commands
- implement PTP adjphase function for HW offset control
- TC support for Geneve and GRE with VF tunnel offload
- more efficient crypto key management method
- multi-port eswitch support
- Netronome/Corigine:
- add DCB IEEE support
- support IPsec offloading for NFP3800
- Freescale/NXP (enetc):
- support XDP_REDIRECT for XDP non-linear buffers
- improve reconfig, avoid link flap and waiting for idle
- support MAC Merge layer
- Other NICs:
- sfc/ef100: add basic devlink support for ef100
- ionic: rx_push mode operation (writing descriptors via MMIO)
- bnxt: use the auxiliary bus abstraction for RDMA
- r8169: disable ASPM and reset bus in case of tx timeout
- cpsw: support QSGMII mode for J721e CPSW9G
- cpts: support pulse-per-second output
- ngbe: add an mdio bus driver
- usbnet: optimize usbnet_bh() by avoiding unnecessary queuing
- r8152: handle devices with FW with NCM support
- amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation
- virtio-net: support multi buffer XDP
- virtio/vsock: replace virtio_vsock_pkt with sk_buff
- tsnep: XDP support
- Ethernet high-speed switches:
- nVidia/Mellanox (mlxsw):
- add support for latency TLV (in FW control messages)
- Microchip (sparx5):
- separate explicit and implicit traffic forwarding rules, make
the implicit rules always active
- add support for egress DSCP rewrite
- IS0 VCAP support (Ingress Classification)
- IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS
etc.)
- ES2 VCAP support (Egress Access Control)
- support for Per-Stream Filtering and Policing (802.1Q,
8.6.5.1)
- Ethernet embedded switches:
- Marvell (mv88e6xxx):
- add MAB (port auth) offload support
- enable PTP receive for mv88e6390
- NXP (ocelot):
- support MAC Merge layer
- support for the the vsc7512 internal copper phys
- Microchip:
- lan9303: convert to PHYLINK
- lan966x: support TC flower filter statistics
- lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x
- lan937x: support Credit Based Shaper configuration
- ksz9477: support Energy Efficient Ethernet
- other:
- qca8k: convert to regmap read/write API, use bulk operations
- rswitch: Improve TX timestamp accuracy
- Intel WiFi (iwlwifi):
- EHT (Wi-Fi 7) rate reporting
- STEP equalizer support: transfer some STEP (connection to radio
on platforms with integrated wifi) related parameters from the
BIOS to the firmware.
- Qualcomm 802.11ax WiFi (ath11k):
- IPQ5018 support
- Fine Timing Measurement (FTM) responder role support
- channel 177 support
- MediaTek WiFi (mt76):
- per-PHY LED support
- mt7996: EHT (Wi-Fi 7) support
- Wireless Ethernet Dispatch (WED) reset support
- switch to using page pool allocator
- RealTek WiFi (rtw89):
- support new version of Bluetooth co-existance
- Mobile:
- rmnet: support TX aggregation"
* tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits)
page_pool: add a comment explaining the fragment counter usage
net: ethtool: fix __ethtool_dev_mm_supported() implementation
ethtool: pse-pd: Fix double word in comments
xsk: add linux/vmalloc.h to xsk.c
sefltests: netdevsim: wait for devlink instance after netns removal
selftest: fib_tests: Always cleanup before exit
net/mlx5e: Align IPsec ASO result memory to be as required by hardware
net/mlx5e: TC, Set CT miss to the specific ct action instance
net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG
net/mlx5: Refactor tc miss handling to a single function
net/mlx5: Kconfig: Make tc offload depend on tc skb extension
net/sched: flower: Support hardware miss to tc action
net/sched: flower: Move filter handle initialization earlier
net/sched: cls_api: Support hardware miss to tc action
net/sched: Rename user cookie and act cookie
sfc: fix builds without CONFIG_RTC_LIB
sfc: clean up some inconsistent indentings
net/mlx4_en: Introduce flexible array to silence overflow warning
net: lan966x: Fix possible deadlock inside PTP
net/ulp: Remove redundant ->clone() test in inet_clone_ulp().
...
Diffstat (limited to 'drivers/net/ethernet/cavium/liquidio/octeon_droq.h')
-rw-r--r-- | drivers/net/ethernet/cavium/liquidio/octeon_droq.h | 416 |
1 files changed, 416 insertions, 0 deletions
diff --git a/drivers/net/ethernet/cavium/liquidio/octeon_droq.h b/drivers/net/ethernet/cavium/liquidio/octeon_droq.h new file mode 100644 index 000000000..c9b19e624 --- /dev/null +++ b/drivers/net/ethernet/cavium/liquidio/octeon_droq.h @@ -0,0 +1,416 @@ +/********************************************************************** + * Author: Cavium, Inc. + * + * Contact: support@cavium.com + * Please include "LiquidIO" in the subject. + * + * Copyright (c) 2003-2016 Cavium, Inc. + * + * This file is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License, Version 2, as + * published by the Free Software Foundation. + * + * This file is distributed in the hope that it will be useful, but + * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or + * NONINFRINGEMENT. See the GNU General Public License for more details. + ***********************************************************************/ +/*! \file octeon_droq.h + * \brief Implementation of Octeon Output queues. "Output" is with + * respect to the Octeon device on the NIC. From this driver's point of + * view they are ingress queues. + */ + +#ifndef __OCTEON_DROQ_H__ +#define __OCTEON_DROQ_H__ + +/* Default number of packets that will be processed in one iteration. */ +#define MAX_PACKET_BUDGET 0xFFFFFFFF + +/** Octeon descriptor format. + * The descriptor ring is made of descriptors which have 2 64-bit values: + * -# Physical (bus) address of the data buffer. + * -# Physical (bus) address of a octeon_droq_info structure. + * The Octeon device DMA's incoming packets and its information at the address + * given by these descriptor fields. + */ +struct octeon_droq_desc { + /** The buffer pointer */ + u64 buffer_ptr; + + /** The Info pointer */ + u64 info_ptr; +}; + +#define OCT_DROQ_DESC_SIZE (sizeof(struct octeon_droq_desc)) + +/** Information about packet DMA'ed by Octeon. + * The format of the information available at Info Pointer after Octeon + * has posted a packet. Not all descriptors have valid information. Only + * the Info field of the first descriptor for a packet has information + * about the packet. + */ +struct octeon_droq_info { + /** The Length of the packet. */ + u64 length; + + /** The Output Receive Header. */ + union octeon_rh rh; +}; + +#define OCT_DROQ_INFO_SIZE (sizeof(struct octeon_droq_info)) + +struct octeon_skb_page_info { + /* DMA address for the page */ + dma_addr_t dma; + + /* Page for the rx dma **/ + struct page *page; + + /** which offset into page */ + unsigned int page_offset; +}; + +/** Pointer to data buffer. + * Driver keeps a pointer to the data buffer that it made available to + * the Octeon device. Since the descriptor ring keeps physical (bus) + * addresses, this field is required for the driver to keep track of + * the virtual address pointers. + */ +struct octeon_recv_buffer { + /** Packet buffer, including metadata. */ + void *buffer; + + /** Data in the packet buffer. */ + u8 *data; + + /** pg_info **/ + struct octeon_skb_page_info pg_info; +}; + +#define OCT_DROQ_RECVBUF_SIZE (sizeof(struct octeon_recv_buffer)) + +/** Output Queue statistics. Each output queue has four stats fields. */ +struct oct_droq_stats { + /** Number of packets received in this queue. */ + u64 pkts_received; + + /** Bytes received by this queue. */ + u64 bytes_received; + + /** Packets dropped due to no dispatch function. */ + u64 dropped_nodispatch; + + /** Packets dropped due to no memory available. */ + u64 dropped_nomem; + + /** Packets dropped due to large number of pkts to process. */ + u64 dropped_toomany; + + /** Number of packets sent to stack from this queue. */ + u64 rx_pkts_received; + + /** Number of Bytes sent to stack from this queue. */ + u64 rx_bytes_received; + + /** Num of Packets dropped due to receive path failures. */ + u64 rx_dropped; + + u64 rx_vxlan; + + /** Num of failures of recv_buffer_alloc() */ + u64 rx_alloc_failure; + +}; + +/* The maximum number of buffers that can be dispatched from the + * output/dma queue. Set to 64 assuming 1K buffers in DROQ and the fact that + * max packet size from DROQ is 64K. + */ +#define MAX_RECV_BUFS 64 + +/** Receive Packet format used when dispatching output queue packets + * with non-raw opcodes. + * The received packet will be sent to the upper layers using this + * structure which is passed as a parameter to the dispatch function + */ +struct octeon_recv_pkt { + /** Number of buffers in this received packet */ + u16 buffer_count; + + /** Id of the device that is sending the packet up */ + u16 octeon_id; + + /** Length of data in the packet buffer */ + u32 length; + + /** The receive header */ + union octeon_rh rh; + + /** Pointer to the OS-specific packet buffer */ + void *buffer_ptr[MAX_RECV_BUFS]; + + /** Size of the buffers pointed to by ptr's in buffer_ptr */ + u32 buffer_size[MAX_RECV_BUFS]; +}; + +#define OCT_RECV_PKT_SIZE (sizeof(struct octeon_recv_pkt)) + +/** The first parameter of a dispatch function. + * For a raw mode opcode, the driver dispatches with the device + * pointer in this structure. + * For non-raw mode opcode, the driver dispatches the recv_pkt + * created to contain the buffers with data received from Octeon. + * --------------------- + * | *recv_pkt ----|--- + * |-------------------| | + * | 0 or more bytes | | + * | reserved by driver| | + * |-------------------|<-/ + * | octeon_recv_pkt | + * | | + * |___________________| + */ +struct octeon_recv_info { + void *rsvd; + struct octeon_recv_pkt *recv_pkt; +}; + +#define OCT_RECV_INFO_SIZE (sizeof(struct octeon_recv_info)) + +/** Allocate a recv_info structure. The recv_pkt pointer in the recv_info + * structure is filled in before this call returns. + * @param extra_bytes - extra bytes to be allocated at the end of the recv info + * structure. + * @return - pointer to a newly allocated recv_info structure. + */ +static inline struct octeon_recv_info *octeon_alloc_recv_info(int extra_bytes) +{ + struct octeon_recv_info *recv_info; + u8 *buf; + + buf = kmalloc(OCT_RECV_PKT_SIZE + OCT_RECV_INFO_SIZE + + extra_bytes, GFP_ATOMIC); + if (!buf) + return NULL; + + recv_info = (struct octeon_recv_info *)buf; + recv_info->recv_pkt = + (struct octeon_recv_pkt *)(buf + OCT_RECV_INFO_SIZE); + recv_info->rsvd = NULL; + if (extra_bytes) + recv_info->rsvd = buf + OCT_RECV_INFO_SIZE + OCT_RECV_PKT_SIZE; + + return recv_info; +} + +/** Free a recv_info structure. + * @param recv_info - Pointer to receive_info to be freed + */ +static inline void octeon_free_recv_info(struct octeon_recv_info *recv_info) +{ + kfree(recv_info); +} + +typedef int (*octeon_dispatch_fn_t)(struct octeon_recv_info *, void *); + +/** Used by NIC module to register packet handler and to get device + * information for each octeon device. + */ +struct octeon_droq_ops { + /** This registered function will be called by the driver with + * the octeon id, pointer to buffer from droq and length of + * data in the buffer. The receive header gives the port + * number to the caller. Function pointer is set by caller. + */ + void (*fptr)(u32, void *, u32, union octeon_rh *, void *, void *); + void *farg; + + /* This function will be called by the driver for all NAPI related + * events. The first param is the octeon id. The second param is the + * output queue number. The third is the NAPI event that occurred. + */ + void (*napi_fn)(void *); + + u32 poll_mode; + + /** Flag indicating if the DROQ handler should drop packets that + * it cannot handle in one iteration. Set by caller. + */ + u32 drop_on_max; +}; + +/** The Descriptor Ring Output Queue structure. + * This structure has all the information required to implement a + * Octeon DROQ. + */ +struct octeon_droq { + u32 q_no; + + u32 pkt_count; + + struct octeon_droq_ops ops; + + struct octeon_device *oct_dev; + + /** The 8B aligned descriptor ring starts at this address. */ + struct octeon_droq_desc *desc_ring; + + /** Index in the ring where the driver should read the next packet */ + u32 read_idx; + + /** Index in the ring where Octeon will write the next packet */ + u32 write_idx; + + /** Index in the ring where the driver will refill the descriptor's + * buffer + */ + u32 refill_idx; + + /** Packets pending to be processed */ + atomic_t pkts_pending; + + /** Number of descriptors in this ring. */ + u32 max_count; + + /** The number of descriptors pending refill. */ + u32 refill_count; + + u32 pkts_per_intr; + u32 refill_threshold; + + /** The max number of descriptors in DROQ without a buffer. + * This field is used to keep track of empty space threshold. If the + * refill_count reaches this value, the DROQ cannot accept a max-sized + * (64K) packet. + */ + u32 max_empty_descs; + + /** The receive buffer list. This list has the virtual addresses of the + * buffers. + */ + struct octeon_recv_buffer *recv_buf_list; + + /** The size of each buffer pointed by the buffer pointer. */ + u32 buffer_size; + + /** Pointer to the mapped packet credit register. + * Host writes number of info/buffer ptrs available to this register + */ + void __iomem *pkts_credit_reg; + + /** Pointer to the mapped packet sent register. + * Octeon writes the number of packets DMA'ed to host memory + * in this register. + */ + void __iomem *pkts_sent_reg; + + struct list_head dispatch_list; + + /** Statistics for this DROQ. */ + struct oct_droq_stats stats; + + /** DMA mapped address of the DROQ descriptor ring. */ + size_t desc_ring_dma; + + /** application context */ + void *app_ctx; + + struct napi_struct napi; + + u32 cpu_id; + + call_single_data_t csd; +}; + +#define OCT_DROQ_SIZE (sizeof(struct octeon_droq)) + +/** + * Allocates space for the descriptor ring for the droq and sets the + * base addr, num desc etc in Octeon registers. + * + * @param oct_dev - pointer to the octeon device structure + * @param q_no - droq no. ranges from 0 - 3. + * @param app_ctx - pointer to application context + * @return Success: 0 Failure: 1 + */ +int octeon_init_droq(struct octeon_device *oct_dev, + u32 q_no, + u32 num_descs, + u32 desc_size, + void *app_ctx); + +/** + * Frees the space for descriptor ring for the droq. + * + * @param oct_dev - pointer to the octeon device structure + * @param q_no - droq no. ranges from 0 - 3. + * @return: Success: 0 Failure: 1 + */ +int octeon_delete_droq(struct octeon_device *oct_dev, u32 q_no); + +/** Register a change in droq operations. The ops field has a pointer to a + * function which will called by the DROQ handler for all packets arriving + * on output queues given by q_no irrespective of the type of packet. + * The ops field also has a flag which if set tells the DROQ handler to + * drop packets if it receives more than what it can process in one + * invocation of the handler. + * @param oct - octeon device + * @param q_no - octeon output queue number (0 <= q_no <= MAX_OCTEON_DROQ-1 + * @param ops - the droq_ops settings for this queue + * @return - 0 on success, -ENODEV or -EINVAL on error. + */ +int +octeon_register_droq_ops(struct octeon_device *oct, + u32 q_no, + struct octeon_droq_ops *ops); + +/** Resets the function pointer and flag settings made by + * octeon_register_droq_ops(). After this routine is called, the DROQ handler + * will lookup dispatch function for each arriving packet on the output queue + * given by q_no. + * @param oct - octeon device + * @param q_no - octeon output queue number (0 <= q_no <= MAX_OCTEON_DROQ-1 + * @return - 0 on success, -ENODEV or -EINVAL on error. + */ +int octeon_unregister_droq_ops(struct octeon_device *oct, u32 q_no); + +/** Register a dispatch function for a opcode/subcode. The driver will call + * this dispatch function when it receives a packet with the given + * opcode/subcode in its output queues along with the user specified + * argument. + * @param oct - the octeon device to register with. + * @param opcode - the opcode for which the dispatch will be registered. + * @param subcode - the subcode for which the dispatch will be registered + * @param fn - the dispatch function. + * @param fn_arg - user specified that will be passed along with the + * dispatch function by the driver. + * @return Success: 0; Failure: 1 + */ +int octeon_register_dispatch_fn(struct octeon_device *oct, + u16 opcode, + u16 subcode, + octeon_dispatch_fn_t fn, void *fn_arg); + +void *octeon_get_dispatch_arg(struct octeon_device *oct, + u16 opcode, u16 subcode); + +void octeon_droq_print_stats(void); + +u32 octeon_droq_check_hw_for_pkts(struct octeon_droq *droq); + +int octeon_create_droq(struct octeon_device *oct, u32 q_no, + u32 num_descs, u32 desc_size, void *app_ctx); + +int octeon_droq_process_packets(struct octeon_device *oct, + struct octeon_droq *droq, + u32 budget); + +int octeon_droq_process_poll_pkts(struct octeon_device *oct, + struct octeon_droq *droq, u32 budget); + +int octeon_enable_irq(struct octeon_device *oct, u32 q_no); + +int octeon_retry_droq_refill(struct octeon_droq *droq); + +#endif /*__OCTEON_DROQ_H__ */ |