From 5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Tue, 21 Feb 2023 18:24:12 -0800 Subject: Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next 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(). ... --- drivers/vdpa/alibaba/Makefile | 3 + drivers/vdpa/alibaba/eni_vdpa.c | 549 ++++++++++++++++++++++++++++++++++++++++ 2 files changed, 552 insertions(+) create mode 100644 drivers/vdpa/alibaba/Makefile create mode 100644 drivers/vdpa/alibaba/eni_vdpa.c (limited to 'drivers/vdpa/alibaba') diff --git a/drivers/vdpa/alibaba/Makefile b/drivers/vdpa/alibaba/Makefile new file mode 100644 index 000000000..ef4aae69f --- /dev/null +++ b/drivers/vdpa/alibaba/Makefile @@ -0,0 +1,3 @@ +# SPDX-License-Identifier: GPL-2.0 +obj-$(CONFIG_ALIBABA_ENI_VDPA) += eni_vdpa.o + diff --git a/drivers/vdpa/alibaba/eni_vdpa.c b/drivers/vdpa/alibaba/eni_vdpa.c new file mode 100644 index 000000000..5a09a09cc --- /dev/null +++ b/drivers/vdpa/alibaba/eni_vdpa.c @@ -0,0 +1,549 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * vDPA bridge driver for Alibaba ENI(Elastic Network Interface) + * + * Copyright (c) 2021, Alibaba Inc. All rights reserved. + * Author: Wu Zongyong + * + */ + +#include "linux/bits.h" +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define ENI_MSIX_NAME_SIZE 256 + +#define ENI_ERR(pdev, fmt, ...) \ + dev_err(&pdev->dev, "%s"fmt, "eni_vdpa: ", ##__VA_ARGS__) +#define ENI_DBG(pdev, fmt, ...) \ + dev_dbg(&pdev->dev, "%s"fmt, "eni_vdpa: ", ##__VA_ARGS__) +#define ENI_INFO(pdev, fmt, ...) \ + dev_info(&pdev->dev, "%s"fmt, "eni_vdpa: ", ##__VA_ARGS__) + +struct eni_vring { + void __iomem *notify; + char msix_name[ENI_MSIX_NAME_SIZE]; + struct vdpa_callback cb; + int irq; +}; + +struct eni_vdpa { + struct vdpa_device vdpa; + struct virtio_pci_legacy_device ldev; + struct eni_vring *vring; + struct vdpa_callback config_cb; + char msix_name[ENI_MSIX_NAME_SIZE]; + int config_irq; + int queues; + int vectors; +}; + +static struct eni_vdpa *vdpa_to_eni(struct vdpa_device *vdpa) +{ + return container_of(vdpa, struct eni_vdpa, vdpa); +} + +static struct virtio_pci_legacy_device *vdpa_to_ldev(struct vdpa_device *vdpa) +{ + struct eni_vdpa *eni_vdpa = vdpa_to_eni(vdpa); + + return &eni_vdpa->ldev; +} + +static u64 eni_vdpa_get_device_features(struct vdpa_device *vdpa) +{ + struct virtio_pci_legacy_device *ldev = vdpa_to_ldev(vdpa); + u64 features = vp_legacy_get_features(ldev); + + features |= BIT_ULL(VIRTIO_F_ACCESS_PLATFORM); + features |= BIT_ULL(VIRTIO_F_ORDER_PLATFORM); + + return features; +} + +static int eni_vdpa_set_driver_features(struct vdpa_device *vdpa, u64 features) +{ + struct virtio_pci_legacy_device *ldev = vdpa_to_ldev(vdpa); + + if (!(features & BIT_ULL(VIRTIO_NET_F_MRG_RXBUF)) && features) { + ENI_ERR(ldev->pci_dev, + "VIRTIO_NET_F_MRG_RXBUF is not negotiated\n"); + return -EINVAL; + } + + vp_legacy_set_features(ldev, (u32)features); + + return 0; +} + +static u64 eni_vdpa_get_driver_features(struct vdpa_device *vdpa) +{ + struct virtio_pci_legacy_device *ldev = vdpa_to_ldev(vdpa); + + return vp_legacy_get_driver_features(ldev); +} + +static u8 eni_vdpa_get_status(struct vdpa_device *vdpa) +{ + struct virtio_pci_legacy_device *ldev = vdpa_to_ldev(vdpa); + + return vp_legacy_get_status(ldev); +} + +static int eni_vdpa_get_vq_irq(struct vdpa_device *vdpa, u16 idx) +{ + struct eni_vdpa *eni_vdpa = vdpa_to_eni(vdpa); + int irq = eni_vdpa->vring[idx].irq; + + if (irq == VIRTIO_MSI_NO_VECTOR) + return -EINVAL; + + return irq; +} + +static void eni_vdpa_free_irq(struct eni_vdpa *eni_vdpa) +{ + struct virtio_pci_legacy_device *ldev = &eni_vdpa->ldev; + struct pci_dev *pdev = ldev->pci_dev; + int i; + + for (i = 0; i < eni_vdpa->queues; i++) { + if (eni_vdpa->vring[i].irq != VIRTIO_MSI_NO_VECTOR) { + vp_legacy_queue_vector(ldev, i, VIRTIO_MSI_NO_VECTOR); + devm_free_irq(&pdev->dev, eni_vdpa->vring[i].irq, + &eni_vdpa->vring[i]); + eni_vdpa->vring[i].irq = VIRTIO_MSI_NO_VECTOR; + } + } + + if (eni_vdpa->config_irq != VIRTIO_MSI_NO_VECTOR) { + vp_legacy_config_vector(ldev, VIRTIO_MSI_NO_VECTOR); + devm_free_irq(&pdev->dev, eni_vdpa->config_irq, eni_vdpa); + eni_vdpa->config_irq = VIRTIO_MSI_NO_VECTOR; + } + + if (eni_vdpa->vectors) { + pci_free_irq_vectors(pdev); + eni_vdpa->vectors = 0; + } +} + +static irqreturn_t eni_vdpa_vq_handler(int irq, void *arg) +{ + struct eni_vring *vring = arg; + + if (vring->cb.callback) + return vring->cb.callback(vring->cb.private); + + return IRQ_HANDLED; +} + +static irqreturn_t eni_vdpa_config_handler(int irq, void *arg) +{ + struct eni_vdpa *eni_vdpa = arg; + + if (eni_vdpa->config_cb.callback) + return eni_vdpa->config_cb.callback(eni_vdpa->config_cb.private); + + return IRQ_HANDLED; +} + +static int eni_vdpa_request_irq(struct eni_vdpa *eni_vdpa) +{ + struct virtio_pci_legacy_device *ldev = &eni_vdpa->ldev; + struct pci_dev *pdev = ldev->pci_dev; + int i, ret, irq; + int queues = eni_vdpa->queues; + int vectors = queues + 1; + + ret = pci_alloc_irq_vectors(pdev, vectors, vectors, PCI_IRQ_MSIX); + if (ret != vectors) { + ENI_ERR(pdev, + "failed to allocate irq vectors want %d but %d\n", + vectors, ret); + return ret; + } + + eni_vdpa->vectors = vectors; + + for (i = 0; i < queues; i++) { + snprintf(eni_vdpa->vring[i].msix_name, ENI_MSIX_NAME_SIZE, + "eni-vdpa[%s]-%d\n", pci_name(pdev), i); + irq = pci_irq_vector(pdev, i); + ret = devm_request_irq(&pdev->dev, irq, + eni_vdpa_vq_handler, + 0, eni_vdpa->vring[i].msix_name, + &eni_vdpa->vring[i]); + if (ret) { + ENI_ERR(pdev, "failed to request irq for vq %d\n", i); + goto err; + } + vp_legacy_queue_vector(ldev, i, i); + eni_vdpa->vring[i].irq = irq; + } + + snprintf(eni_vdpa->msix_name, ENI_MSIX_NAME_SIZE, "eni-vdpa[%s]-config\n", + pci_name(pdev)); + irq = pci_irq_vector(pdev, queues); + ret = devm_request_irq(&pdev->dev, irq, eni_vdpa_config_handler, 0, + eni_vdpa->msix_name, eni_vdpa); + if (ret) { + ENI_ERR(pdev, "failed to request irq for config vq %d\n", i); + goto err; + } + vp_legacy_config_vector(ldev, queues); + eni_vdpa->config_irq = irq; + + return 0; +err: + eni_vdpa_free_irq(eni_vdpa); + return ret; +} + +static void eni_vdpa_set_status(struct vdpa_device *vdpa, u8 status) +{ + struct eni_vdpa *eni_vdpa = vdpa_to_eni(vdpa); + struct virtio_pci_legacy_device *ldev = &eni_vdpa->ldev; + u8 s = eni_vdpa_get_status(vdpa); + + if (status & VIRTIO_CONFIG_S_DRIVER_OK && + !(s & VIRTIO_CONFIG_S_DRIVER_OK)) { + eni_vdpa_request_irq(eni_vdpa); + } + + vp_legacy_set_status(ldev, status); + + if (!(status & VIRTIO_CONFIG_S_DRIVER_OK) && + (s & VIRTIO_CONFIG_S_DRIVER_OK)) + eni_vdpa_free_irq(eni_vdpa); +} + +static int eni_vdpa_reset(struct vdpa_device *vdpa) +{ + struct eni_vdpa *eni_vdpa = vdpa_to_eni(vdpa); + struct virtio_pci_legacy_device *ldev = &eni_vdpa->ldev; + u8 s = eni_vdpa_get_status(vdpa); + + vp_legacy_set_status(ldev, 0); + + if (s & VIRTIO_CONFIG_S_DRIVER_OK) + eni_vdpa_free_irq(eni_vdpa); + + return 0; +} + +static u16 eni_vdpa_get_vq_num_max(struct vdpa_device *vdpa) +{ + struct virtio_pci_legacy_device *ldev = vdpa_to_ldev(vdpa); + + return vp_legacy_get_queue_size(ldev, 0); +} + +static u16 eni_vdpa_get_vq_num_min(struct vdpa_device *vdpa) +{ + struct virtio_pci_legacy_device *ldev = vdpa_to_ldev(vdpa); + + return vp_legacy_get_queue_size(ldev, 0); +} + +static int eni_vdpa_get_vq_state(struct vdpa_device *vdpa, u16 qid, + struct vdpa_vq_state *state) +{ + return -EOPNOTSUPP; +} + +static int eni_vdpa_set_vq_state(struct vdpa_device *vdpa, u16 qid, + const struct vdpa_vq_state *state) +{ + struct virtio_pci_legacy_device *ldev = vdpa_to_ldev(vdpa); + const struct vdpa_vq_state_split *split = &state->split; + + /* ENI is build upon virtio-pci specfication which not support + * to set state of virtqueue. But if the state is equal to the + * device initial state by chance, we can let it go. + */ + if (!vp_legacy_get_queue_enable(ldev, qid) + && split->avail_index == 0) + return 0; + + return -EOPNOTSUPP; +} + + +static void eni_vdpa_set_vq_cb(struct vdpa_device *vdpa, u16 qid, + struct vdpa_callback *cb) +{ + struct eni_vdpa *eni_vdpa = vdpa_to_eni(vdpa); + + eni_vdpa->vring[qid].cb = *cb; +} + +static void eni_vdpa_set_vq_ready(struct vdpa_device *vdpa, u16 qid, + bool ready) +{ + struct virtio_pci_legacy_device *ldev = vdpa_to_ldev(vdpa); + + /* ENI is a legacy virtio-pci device. This is not supported + * by specification. But we can disable virtqueue by setting + * address to 0. + */ + if (!ready) + vp_legacy_set_queue_address(ldev, qid, 0); +} + +static bool eni_vdpa_get_vq_ready(struct vdpa_device *vdpa, u16 qid) +{ + struct virtio_pci_legacy_device *ldev = vdpa_to_ldev(vdpa); + + return vp_legacy_get_queue_enable(ldev, qid); +} + +static void eni_vdpa_set_vq_num(struct vdpa_device *vdpa, u16 qid, + u32 num) +{ + struct virtio_pci_legacy_device *ldev = vdpa_to_ldev(vdpa); + struct pci_dev *pdev = ldev->pci_dev; + u16 n = vp_legacy_get_queue_size(ldev, qid); + + /* ENI is a legacy virtio-pci device which not allow to change + * virtqueue size. Just report a error if someone tries to + * change it. + */ + if (num != n) + ENI_ERR(pdev, + "not support to set vq %u fixed num %u to %u\n", + qid, n, num); +} + +static int eni_vdpa_set_vq_address(struct vdpa_device *vdpa, u16 qid, + u64 desc_area, u64 driver_area, + u64 device_area) +{ + struct virtio_pci_legacy_device *ldev = vdpa_to_ldev(vdpa); + u32 pfn = desc_area >> VIRTIO_PCI_QUEUE_ADDR_SHIFT; + + vp_legacy_set_queue_address(ldev, qid, pfn); + + return 0; +} + +static void eni_vdpa_kick_vq(struct vdpa_device *vdpa, u16 qid) +{ + struct eni_vdpa *eni_vdpa = vdpa_to_eni(vdpa); + + iowrite16(qid, eni_vdpa->vring[qid].notify); +} + +static u32 eni_vdpa_get_device_id(struct vdpa_device *vdpa) +{ + struct virtio_pci_legacy_device *ldev = vdpa_to_ldev(vdpa); + + return ldev->id.device; +} + +static u32 eni_vdpa_get_vendor_id(struct vdpa_device *vdpa) +{ + struct virtio_pci_legacy_device *ldev = vdpa_to_ldev(vdpa); + + return ldev->id.vendor; +} + +static u32 eni_vdpa_get_vq_align(struct vdpa_device *vdpa) +{ + return VIRTIO_PCI_VRING_ALIGN; +} + +static size_t eni_vdpa_get_config_size(struct vdpa_device *vdpa) +{ + return sizeof(struct virtio_net_config); +} + + +static void eni_vdpa_get_config(struct vdpa_device *vdpa, + unsigned int offset, + void *buf, unsigned int len) +{ + struct eni_vdpa *eni_vdpa = vdpa_to_eni(vdpa); + struct virtio_pci_legacy_device *ldev = &eni_vdpa->ldev; + void __iomem *ioaddr = ldev->ioaddr + + VIRTIO_PCI_CONFIG_OFF(eni_vdpa->vectors) + + offset; + u8 *p = buf; + int i; + + for (i = 0; i < len; i++) + *p++ = ioread8(ioaddr + i); +} + +static void eni_vdpa_set_config(struct vdpa_device *vdpa, + unsigned int offset, const void *buf, + unsigned int len) +{ + struct eni_vdpa *eni_vdpa = vdpa_to_eni(vdpa); + struct virtio_pci_legacy_device *ldev = &eni_vdpa->ldev; + void __iomem *ioaddr = ldev->ioaddr + + VIRTIO_PCI_CONFIG_OFF(eni_vdpa->vectors) + + offset; + const u8 *p = buf; + int i; + + for (i = 0; i < len; i++) + iowrite8(*p++, ioaddr + i); +} + +static void eni_vdpa_set_config_cb(struct vdpa_device *vdpa, + struct vdpa_callback *cb) +{ + struct eni_vdpa *eni_vdpa = vdpa_to_eni(vdpa); + + eni_vdpa->config_cb = *cb; +} + +static const struct vdpa_config_ops eni_vdpa_ops = { + .get_device_features = eni_vdpa_get_device_features, + .set_driver_features = eni_vdpa_set_driver_features, + .get_driver_features = eni_vdpa_get_driver_features, + .get_status = eni_vdpa_get_status, + .set_status = eni_vdpa_set_status, + .reset = eni_vdpa_reset, + .get_vq_num_max = eni_vdpa_get_vq_num_max, + .get_vq_num_min = eni_vdpa_get_vq_num_min, + .get_vq_state = eni_vdpa_get_vq_state, + .set_vq_state = eni_vdpa_set_vq_state, + .set_vq_cb = eni_vdpa_set_vq_cb, + .set_vq_ready = eni_vdpa_set_vq_ready, + .get_vq_ready = eni_vdpa_get_vq_ready, + .set_vq_num = eni_vdpa_set_vq_num, + .set_vq_address = eni_vdpa_set_vq_address, + .kick_vq = eni_vdpa_kick_vq, + .get_device_id = eni_vdpa_get_device_id, + .get_vendor_id = eni_vdpa_get_vendor_id, + .get_vq_align = eni_vdpa_get_vq_align, + .get_config_size = eni_vdpa_get_config_size, + .get_config = eni_vdpa_get_config, + .set_config = eni_vdpa_set_config, + .set_config_cb = eni_vdpa_set_config_cb, + .get_vq_irq = eni_vdpa_get_vq_irq, +}; + + +static u16 eni_vdpa_get_num_queues(struct eni_vdpa *eni_vdpa) +{ + struct virtio_pci_legacy_device *ldev = &eni_vdpa->ldev; + u32 features = vp_legacy_get_features(ldev); + u16 num = 2; + + if (features & BIT_ULL(VIRTIO_NET_F_MQ)) { + __virtio16 max_virtqueue_pairs; + + eni_vdpa_get_config(&eni_vdpa->vdpa, + offsetof(struct virtio_net_config, max_virtqueue_pairs), + &max_virtqueue_pairs, + sizeof(max_virtqueue_pairs)); + num = 2 * __virtio16_to_cpu(virtio_legacy_is_little_endian(), + max_virtqueue_pairs); + } + + if (features & BIT_ULL(VIRTIO_NET_F_CTRL_VQ)) + num += 1; + + return num; +} + +static int eni_vdpa_probe(struct pci_dev *pdev, const struct pci_device_id *id) +{ + struct device *dev = &pdev->dev; + struct eni_vdpa *eni_vdpa; + struct virtio_pci_legacy_device *ldev; + int ret, i; + + ret = pcim_enable_device(pdev); + if (ret) + return ret; + + eni_vdpa = vdpa_alloc_device(struct eni_vdpa, vdpa, + dev, &eni_vdpa_ops, 1, 1, NULL, false); + if (IS_ERR(eni_vdpa)) { + ENI_ERR(pdev, "failed to allocate vDPA structure\n"); + return PTR_ERR(eni_vdpa); + } + + ldev = &eni_vdpa->ldev; + ldev->pci_dev = pdev; + + ret = vp_legacy_probe(ldev); + if (ret) { + ENI_ERR(pdev, "failed to probe legacy PCI device\n"); + goto err; + } + + pci_set_master(pdev); + pci_set_drvdata(pdev, eni_vdpa); + + eni_vdpa->vdpa.dma_dev = &pdev->dev; + eni_vdpa->queues = eni_vdpa_get_num_queues(eni_vdpa); + + eni_vdpa->vring = devm_kcalloc(&pdev->dev, eni_vdpa->queues, + sizeof(*eni_vdpa->vring), + GFP_KERNEL); + if (!eni_vdpa->vring) { + ret = -ENOMEM; + ENI_ERR(pdev, "failed to allocate virtqueues\n"); + goto err; + } + + for (i = 0; i < eni_vdpa->queues; i++) { + eni_vdpa->vring[i].irq = VIRTIO_MSI_NO_VECTOR; + eni_vdpa->vring[i].notify = ldev->ioaddr + VIRTIO_PCI_QUEUE_NOTIFY; + } + eni_vdpa->config_irq = VIRTIO_MSI_NO_VECTOR; + + ret = vdpa_register_device(&eni_vdpa->vdpa, eni_vdpa->queues); + if (ret) { + ENI_ERR(pdev, "failed to register to vdpa bus\n"); + goto err; + } + + return 0; + +err: + put_device(&eni_vdpa->vdpa.dev); + return ret; +} + +static void eni_vdpa_remove(struct pci_dev *pdev) +{ + struct eni_vdpa *eni_vdpa = pci_get_drvdata(pdev); + + vdpa_unregister_device(&eni_vdpa->vdpa); + vp_legacy_remove(&eni_vdpa->ldev); +} + +static struct pci_device_id eni_pci_ids[] = { + { PCI_DEVICE_SUB(PCI_VENDOR_ID_REDHAT_QUMRANET, + VIRTIO_TRANS_ID_NET, + PCI_SUBVENDOR_ID_REDHAT_QUMRANET, + VIRTIO_ID_NET) }, + { 0 }, +}; + +static struct pci_driver eni_vdpa_driver = { + .name = "alibaba-eni-vdpa", + .id_table = eni_pci_ids, + .probe = eni_vdpa_probe, + .remove = eni_vdpa_remove, +}; + +module_pci_driver(eni_vdpa_driver); + +MODULE_AUTHOR("Wu Zongyong "); +MODULE_DESCRIPTION("Alibaba ENI vDPA driver"); +MODULE_LICENSE("GPL v2"); -- cgit v1.2.3