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(). ... --- .../net/ethernet/marvell/prestera/prestera_acl.c | 927 +++++++++++++++++++++ 1 file changed, 927 insertions(+) create mode 100644 drivers/net/ethernet/marvell/prestera/prestera_acl.c (limited to 'drivers/net/ethernet/marvell/prestera/prestera_acl.c') diff --git a/drivers/net/ethernet/marvell/prestera/prestera_acl.c b/drivers/net/ethernet/marvell/prestera/prestera_acl.c new file mode 100644 index 000000000..cba89fda5 --- /dev/null +++ b/drivers/net/ethernet/marvell/prestera/prestera_acl.c @@ -0,0 +1,927 @@ +// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 +/* Copyright (c) 2020-2021 Marvell International Ltd. All rights reserved */ + +#include + +#include "prestera_acl.h" +#include "prestera_flow.h" +#include "prestera_hw.h" +#include "prestera.h" + +#define ACL_KEYMASK_SIZE \ + (sizeof(__be32) * __PRESTERA_ACL_RULE_MATCH_TYPE_MAX) + +struct prestera_acl { + struct prestera_switch *sw; + struct list_head vtcam_list; + struct list_head rules; + struct rhashtable ruleset_ht; + struct rhashtable acl_rule_entry_ht; + struct idr uid; +}; + +struct prestera_acl_ruleset_ht_key { + struct prestera_flow_block *block; + u32 chain_index; +}; + +struct prestera_acl_rule_entry { + struct rhash_head ht_node; + struct prestera_acl_rule_entry_key key; + u32 hw_id; + u32 vtcam_id; + struct { + struct { + u8 valid:1; + } accept, drop, trap; + struct { + u8 valid:1; + struct prestera_acl_action_police i; + } police; + struct { + struct prestera_acl_action_jump i; + u8 valid:1; + } jump; + struct { + u32 id; + struct prestera_counter_block *block; + } counter; + }; +}; + +struct prestera_acl_ruleset { + struct rhash_head ht_node; /* Member of acl HT */ + struct prestera_acl_ruleset_ht_key ht_key; + struct rhashtable rule_ht; + struct prestera_acl *acl; + struct { + u32 min; + u32 max; + } prio; + unsigned long rule_count; + refcount_t refcount; + void *keymask; + u32 vtcam_id; + u32 index; + u16 pcl_id; + bool offload; + bool ingress; +}; + +struct prestera_acl_vtcam { + struct list_head list; + __be32 keymask[__PRESTERA_ACL_RULE_MATCH_TYPE_MAX]; + refcount_t refcount; + u32 id; + bool is_keymask_set; + u8 lookup; + u8 direction; +}; + +static const struct rhashtable_params prestera_acl_ruleset_ht_params = { + .key_len = sizeof(struct prestera_acl_ruleset_ht_key), + .key_offset = offsetof(struct prestera_acl_ruleset, ht_key), + .head_offset = offsetof(struct prestera_acl_ruleset, ht_node), + .automatic_shrinking = true, +}; + +static const struct rhashtable_params prestera_acl_rule_ht_params = { + .key_len = sizeof(unsigned long), + .key_offset = offsetof(struct prestera_acl_rule, cookie), + .head_offset = offsetof(struct prestera_acl_rule, ht_node), + .automatic_shrinking = true, +}; + +static const struct rhashtable_params __prestera_acl_rule_entry_ht_params = { + .key_offset = offsetof(struct prestera_acl_rule_entry, key), + .head_offset = offsetof(struct prestera_acl_rule_entry, ht_node), + .key_len = sizeof(struct prestera_acl_rule_entry_key), + .automatic_shrinking = true, +}; + +int prestera_acl_chain_to_client(u32 chain_index, bool ingress, u32 *client) +{ + static const u32 ingress_client_map[] = { + PRESTERA_HW_COUNTER_CLIENT_INGRESS_LOOKUP_0, + PRESTERA_HW_COUNTER_CLIENT_INGRESS_LOOKUP_1, + PRESTERA_HW_COUNTER_CLIENT_INGRESS_LOOKUP_2 + }; + + if (!ingress) { + /* prestera supports only one chain on egress */ + if (chain_index > 0) + return -EINVAL; + + *client = PRESTERA_HW_COUNTER_CLIENT_EGRESS_LOOKUP; + return 0; + } + + if (chain_index >= ARRAY_SIZE(ingress_client_map)) + return -EINVAL; + + *client = ingress_client_map[chain_index]; + return 0; +} + +static bool prestera_acl_chain_is_supported(u32 chain_index, bool ingress) +{ + if (!ingress) + /* prestera supports only one chain on egress */ + return chain_index == 0; + + return (chain_index & ~PRESTERA_ACL_CHAIN_MASK) == 0; +} + +static struct prestera_acl_ruleset * +prestera_acl_ruleset_create(struct prestera_acl *acl, + struct prestera_flow_block *block, + u32 chain_index) +{ + struct prestera_acl_ruleset *ruleset; + u32 uid = 0; + int err; + + if (!prestera_acl_chain_is_supported(chain_index, block->ingress)) + return ERR_PTR(-EINVAL); + + ruleset = kzalloc(sizeof(*ruleset), GFP_KERNEL); + if (!ruleset) + return ERR_PTR(-ENOMEM); + + ruleset->acl = acl; + ruleset->ingress = block->ingress; + ruleset->ht_key.block = block; + ruleset->ht_key.chain_index = chain_index; + refcount_set(&ruleset->refcount, 1); + + err = rhashtable_init(&ruleset->rule_ht, &prestera_acl_rule_ht_params); + if (err) + goto err_rhashtable_init; + + err = idr_alloc_u32(&acl->uid, NULL, &uid, U8_MAX, GFP_KERNEL); + if (err) + goto err_ruleset_create; + + /* make pcl-id based on uid */ + ruleset->pcl_id = PRESTERA_ACL_PCL_ID_MAKE((u8)uid, chain_index); + ruleset->index = uid; + + ruleset->prio.min = UINT_MAX; + ruleset->prio.max = 0; + + err = rhashtable_insert_fast(&acl->ruleset_ht, &ruleset->ht_node, + prestera_acl_ruleset_ht_params); + if (err) + goto err_ruleset_ht_insert; + + return ruleset; + +err_ruleset_ht_insert: + idr_remove(&acl->uid, uid); +err_ruleset_create: + rhashtable_destroy(&ruleset->rule_ht); +err_rhashtable_init: + kfree(ruleset); + return ERR_PTR(err); +} + +int prestera_acl_ruleset_keymask_set(struct prestera_acl_ruleset *ruleset, + void *keymask) +{ + ruleset->keymask = kmemdup(keymask, ACL_KEYMASK_SIZE, GFP_KERNEL); + if (!ruleset->keymask) + return -ENOMEM; + + return 0; +} + +int prestera_acl_ruleset_offload(struct prestera_acl_ruleset *ruleset) +{ + struct prestera_acl_iface iface; + u32 vtcam_id; + int dir; + int err; + + dir = ruleset->ingress ? + PRESTERA_HW_VTCAM_DIR_INGRESS : PRESTERA_HW_VTCAM_DIR_EGRESS; + + if (ruleset->offload) + return -EEXIST; + + err = prestera_acl_vtcam_id_get(ruleset->acl, + ruleset->ht_key.chain_index, + dir, + ruleset->keymask, &vtcam_id); + if (err) + goto err_vtcam_create; + + if (ruleset->ht_key.chain_index) { + /* for chain > 0, bind iface index to pcl-id to be able + * to jump from any other ruleset to this one using the index. + */ + iface.index = ruleset->index; + iface.type = PRESTERA_ACL_IFACE_TYPE_INDEX; + err = prestera_hw_vtcam_iface_bind(ruleset->acl->sw, &iface, + vtcam_id, ruleset->pcl_id); + if (err) + goto err_ruleset_bind; + } + + ruleset->vtcam_id = vtcam_id; + ruleset->offload = true; + return 0; + +err_ruleset_bind: + prestera_acl_vtcam_id_put(ruleset->acl, ruleset->vtcam_id); +err_vtcam_create: + return err; +} + +static void prestera_acl_ruleset_destroy(struct prestera_acl_ruleset *ruleset) +{ + struct prestera_acl *acl = ruleset->acl; + u8 uid = ruleset->pcl_id & PRESTERA_ACL_KEYMASK_PCL_ID_USER; + int err; + + rhashtable_remove_fast(&acl->ruleset_ht, &ruleset->ht_node, + prestera_acl_ruleset_ht_params); + + if (ruleset->offload) { + if (ruleset->ht_key.chain_index) { + struct prestera_acl_iface iface = { + .type = PRESTERA_ACL_IFACE_TYPE_INDEX, + .index = ruleset->index + }; + err = prestera_hw_vtcam_iface_unbind(acl->sw, &iface, + ruleset->vtcam_id); + WARN_ON(err); + } + WARN_ON(prestera_acl_vtcam_id_put(acl, ruleset->vtcam_id)); + } + + idr_remove(&acl->uid, uid); + rhashtable_destroy(&ruleset->rule_ht); + kfree(ruleset->keymask); + kfree(ruleset); +} + +static struct prestera_acl_ruleset * +__prestera_acl_ruleset_lookup(struct prestera_acl *acl, + struct prestera_flow_block *block, + u32 chain_index) +{ + struct prestera_acl_ruleset_ht_key ht_key; + + memset(&ht_key, 0, sizeof(ht_key)); + ht_key.block = block; + ht_key.chain_index = chain_index; + return rhashtable_lookup_fast(&acl->ruleset_ht, &ht_key, + prestera_acl_ruleset_ht_params); +} + +struct prestera_acl_ruleset * +prestera_acl_ruleset_lookup(struct prestera_acl *acl, + struct prestera_flow_block *block, + u32 chain_index) +{ + struct prestera_acl_ruleset *ruleset; + + ruleset = __prestera_acl_ruleset_lookup(acl, block, chain_index); + if (!ruleset) + return ERR_PTR(-ENOENT); + + refcount_inc(&ruleset->refcount); + return ruleset; +} + +struct prestera_acl_ruleset * +prestera_acl_ruleset_get(struct prestera_acl *acl, + struct prestera_flow_block *block, + u32 chain_index) +{ + struct prestera_acl_ruleset *ruleset; + + ruleset = __prestera_acl_ruleset_lookup(acl, block, chain_index); + if (ruleset) { + refcount_inc(&ruleset->refcount); + return ruleset; + } + + return prestera_acl_ruleset_create(acl, block, chain_index); +} + +void prestera_acl_ruleset_put(struct prestera_acl_ruleset *ruleset) +{ + if (!refcount_dec_and_test(&ruleset->refcount)) + return; + + prestera_acl_ruleset_destroy(ruleset); +} + +int prestera_acl_ruleset_bind(struct prestera_acl_ruleset *ruleset, + struct prestera_port *port) +{ + struct prestera_acl_iface iface = { + .type = PRESTERA_ACL_IFACE_TYPE_PORT, + .port = port + }; + + return prestera_hw_vtcam_iface_bind(port->sw, &iface, ruleset->vtcam_id, + ruleset->pcl_id); +} + +int prestera_acl_ruleset_unbind(struct prestera_acl_ruleset *ruleset, + struct prestera_port *port) +{ + struct prestera_acl_iface iface = { + .type = PRESTERA_ACL_IFACE_TYPE_PORT, + .port = port + }; + + return prestera_hw_vtcam_iface_unbind(port->sw, &iface, + ruleset->vtcam_id); +} + +static int prestera_acl_ruleset_block_bind(struct prestera_acl_ruleset *ruleset, + struct prestera_flow_block *block) +{ + struct prestera_flow_block_binding *binding; + int err; + + block->ruleset_zero = ruleset; + list_for_each_entry(binding, &block->binding_list, list) { + err = prestera_acl_ruleset_bind(ruleset, binding->port); + if (err) + goto rollback; + } + return 0; + +rollback: + list_for_each_entry_continue_reverse(binding, &block->binding_list, + list) + err = prestera_acl_ruleset_unbind(ruleset, binding->port); + block->ruleset_zero = NULL; + + return err; +} + +static void +prestera_acl_ruleset_block_unbind(struct prestera_acl_ruleset *ruleset, + struct prestera_flow_block *block) +{ + struct prestera_flow_block_binding *binding; + + list_for_each_entry(binding, &block->binding_list, list) + prestera_acl_ruleset_unbind(ruleset, binding->port); + block->ruleset_zero = NULL; +} + +static void +prestera_acl_ruleset_prio_refresh(struct prestera_acl *acl, + struct prestera_acl_ruleset *ruleset) +{ + struct prestera_acl_rule *rule; + + ruleset->prio.min = UINT_MAX; + ruleset->prio.max = 0; + + list_for_each_entry(rule, &acl->rules, list) { + if (ruleset->ingress != rule->ruleset->ingress) + continue; + if (ruleset->ht_key.chain_index != rule->chain_index) + continue; + + ruleset->prio.min = min(ruleset->prio.min, rule->priority); + ruleset->prio.max = max(ruleset->prio.max, rule->priority); + } +} + +void +prestera_acl_rule_keymask_pcl_id_set(struct prestera_acl_rule *rule, u16 pcl_id) +{ + struct prestera_acl_match *r_match = &rule->re_key.match; + __be16 pcl_id_mask = htons(PRESTERA_ACL_KEYMASK_PCL_ID); + __be16 pcl_id_key = htons(pcl_id); + + rule_match_set(r_match->key, PCL_ID, pcl_id_key); + rule_match_set(r_match->mask, PCL_ID, pcl_id_mask); +} + +struct prestera_acl_rule * +prestera_acl_rule_lookup(struct prestera_acl_ruleset *ruleset, + unsigned long cookie) +{ + return rhashtable_lookup_fast(&ruleset->rule_ht, &cookie, + prestera_acl_rule_ht_params); +} + +u32 prestera_acl_ruleset_index_get(const struct prestera_acl_ruleset *ruleset) +{ + return ruleset->index; +} + +void prestera_acl_ruleset_prio_get(struct prestera_acl_ruleset *ruleset, + u32 *prio_min, u32 *prio_max) +{ + *prio_min = ruleset->prio.min; + *prio_max = ruleset->prio.max; +} + +bool prestera_acl_ruleset_is_offload(struct prestera_acl_ruleset *ruleset) +{ + return ruleset->offload; +} + +struct prestera_acl_rule * +prestera_acl_rule_create(struct prestera_acl_ruleset *ruleset, + unsigned long cookie, u32 chain_index) +{ + struct prestera_acl_rule *rule; + + rule = kzalloc(sizeof(*rule), GFP_KERNEL); + if (!rule) + return ERR_PTR(-ENOMEM); + + rule->ruleset = ruleset; + rule->cookie = cookie; + rule->chain_index = chain_index; + + refcount_inc(&ruleset->refcount); + + return rule; +} + +void prestera_acl_rule_priority_set(struct prestera_acl_rule *rule, + u32 priority) +{ + rule->priority = priority; +} + +void prestera_acl_rule_destroy(struct prestera_acl_rule *rule) +{ + if (rule->jump_ruleset) + /* release ruleset kept by jump action */ + prestera_acl_ruleset_put(rule->jump_ruleset); + + prestera_acl_ruleset_put(rule->ruleset); + kfree(rule); +} + +static void prestera_acl_ruleset_prio_update(struct prestera_acl_ruleset *ruleset, + u32 prio) +{ + ruleset->prio.min = min(ruleset->prio.min, prio); + ruleset->prio.max = max(ruleset->prio.max, prio); +} + +int prestera_acl_rule_add(struct prestera_switch *sw, + struct prestera_acl_rule *rule) +{ + int err; + struct prestera_acl_ruleset *ruleset = rule->ruleset; + struct prestera_flow_block *block = ruleset->ht_key.block; + + /* try to add rule to hash table first */ + err = rhashtable_insert_fast(&ruleset->rule_ht, &rule->ht_node, + prestera_acl_rule_ht_params); + if (err) + goto err_ht_insert; + + prestera_acl_rule_keymask_pcl_id_set(rule, ruleset->pcl_id); + rule->re_arg.vtcam_id = ruleset->vtcam_id; + rule->re_key.prio = rule->priority; + + rule->re = prestera_acl_rule_entry_find(sw->acl, &rule->re_key); + err = WARN_ON(rule->re) ? -EEXIST : 0; + if (err) + goto err_rule_add; + + rule->re = prestera_acl_rule_entry_create(sw->acl, &rule->re_key, + &rule->re_arg); + err = !rule->re ? -EINVAL : 0; + if (err) + goto err_rule_add; + + /* bind the block (all ports) to chain index 0, rest of + * the chains are bound to goto action + */ + if (!ruleset->ht_key.chain_index && !ruleset->rule_count) { + err = prestera_acl_ruleset_block_bind(ruleset, block); + if (err) + goto err_acl_block_bind; + } + + list_add_tail(&rule->list, &sw->acl->rules); + ruleset->rule_count++; + prestera_acl_ruleset_prio_update(ruleset, rule->priority); + return 0; + +err_acl_block_bind: + prestera_acl_rule_entry_destroy(sw->acl, rule->re); +err_rule_add: + rule->re = NULL; + rhashtable_remove_fast(&ruleset->rule_ht, &rule->ht_node, + prestera_acl_rule_ht_params); +err_ht_insert: + return err; +} + +void prestera_acl_rule_del(struct prestera_switch *sw, + struct prestera_acl_rule *rule) +{ + struct prestera_acl_ruleset *ruleset = rule->ruleset; + struct prestera_flow_block *block = ruleset->ht_key.block; + + rhashtable_remove_fast(&ruleset->rule_ht, &rule->ht_node, + prestera_acl_rule_ht_params); + ruleset->rule_count--; + list_del(&rule->list); + + prestera_acl_rule_entry_destroy(sw->acl, rule->re); + prestera_acl_ruleset_prio_refresh(sw->acl, ruleset); + + /* unbind block (all ports) */ + if (!ruleset->ht_key.chain_index && !ruleset->rule_count) + prestera_acl_ruleset_block_unbind(ruleset, block); +} + +int prestera_acl_rule_get_stats(struct prestera_acl *acl, + struct prestera_acl_rule *rule, + u64 *packets, u64 *bytes, u64 *last_use) +{ + u64 current_packets; + u64 current_bytes; + int err; + + err = prestera_counter_stats_get(acl->sw->counter, + rule->re->counter.block, + rule->re->counter.id, + ¤t_packets, ¤t_bytes); + if (err) + return err; + + *packets = current_packets; + *bytes = current_bytes; + *last_use = jiffies; + + return 0; +} + +struct prestera_acl_rule_entry * +prestera_acl_rule_entry_find(struct prestera_acl *acl, + struct prestera_acl_rule_entry_key *key) +{ + return rhashtable_lookup_fast(&acl->acl_rule_entry_ht, key, + __prestera_acl_rule_entry_ht_params); +} + +static int __prestera_acl_rule_entry2hw_del(struct prestera_switch *sw, + struct prestera_acl_rule_entry *e) +{ + return prestera_hw_vtcam_rule_del(sw, e->vtcam_id, e->hw_id); +} + +static int __prestera_acl_rule_entry2hw_add(struct prestera_switch *sw, + struct prestera_acl_rule_entry *e) +{ + struct prestera_acl_hw_action_info act_hw[PRESTERA_ACL_RULE_ACTION_MAX]; + int act_num; + + memset(&act_hw, 0, sizeof(act_hw)); + act_num = 0; + + /* accept */ + if (e->accept.valid) { + act_hw[act_num].id = PRESTERA_ACL_RULE_ACTION_ACCEPT; + act_num++; + } + /* drop */ + if (e->drop.valid) { + act_hw[act_num].id = PRESTERA_ACL_RULE_ACTION_DROP; + act_num++; + } + /* trap */ + if (e->trap.valid) { + act_hw[act_num].id = PRESTERA_ACL_RULE_ACTION_TRAP; + act_num++; + } + /* police */ + if (e->police.valid) { + act_hw[act_num].id = PRESTERA_ACL_RULE_ACTION_POLICE; + act_hw[act_num].police = e->police.i; + act_num++; + } + /* jump */ + if (e->jump.valid) { + act_hw[act_num].id = PRESTERA_ACL_RULE_ACTION_JUMP; + act_hw[act_num].jump = e->jump.i; + act_num++; + } + /* counter */ + if (e->counter.block) { + act_hw[act_num].id = PRESTERA_ACL_RULE_ACTION_COUNT; + act_hw[act_num].count.id = e->counter.id; + act_num++; + } + + return prestera_hw_vtcam_rule_add(sw, e->vtcam_id, e->key.prio, + e->key.match.key, e->key.match.mask, + act_hw, act_num, &e->hw_id); +} + +static void +__prestera_acl_rule_entry_act_destruct(struct prestera_switch *sw, + struct prestera_acl_rule_entry *e) +{ + /* counter */ + prestera_counter_put(sw->counter, e->counter.block, e->counter.id); + /* police */ + if (e->police.valid) + prestera_hw_policer_release(sw, e->police.i.id); +} + +void prestera_acl_rule_entry_destroy(struct prestera_acl *acl, + struct prestera_acl_rule_entry *e) +{ + int ret; + + rhashtable_remove_fast(&acl->acl_rule_entry_ht, &e->ht_node, + __prestera_acl_rule_entry_ht_params); + + ret = __prestera_acl_rule_entry2hw_del(acl->sw, e); + WARN_ON(ret && ret != -ENODEV); + + __prestera_acl_rule_entry_act_destruct(acl->sw, e); + kfree(e); +} + +static int +__prestera_acl_rule_entry_act_construct(struct prestera_switch *sw, + struct prestera_acl_rule_entry *e, + struct prestera_acl_rule_entry_arg *arg) +{ + int err; + + /* accept */ + e->accept.valid = arg->accept.valid; + /* drop */ + e->drop.valid = arg->drop.valid; + /* trap */ + e->trap.valid = arg->trap.valid; + /* jump */ + e->jump.valid = arg->jump.valid; + e->jump.i = arg->jump.i; + /* police */ + if (arg->police.valid) { + u8 type = arg->police.ingress ? PRESTERA_POLICER_TYPE_INGRESS : + PRESTERA_POLICER_TYPE_EGRESS; + + err = prestera_hw_policer_create(sw, type, &e->police.i.id); + if (err) + goto err_out; + + err = prestera_hw_policer_sr_tcm_set(sw, e->police.i.id, + arg->police.rate, + arg->police.burst); + if (err) { + prestera_hw_policer_release(sw, e->police.i.id); + goto err_out; + } + e->police.valid = arg->police.valid; + } + /* counter */ + if (arg->count.valid) { + err = prestera_counter_get(sw->counter, arg->count.client, + &e->counter.block, + &e->counter.id); + if (err) + goto err_out; + } + + return 0; + +err_out: + __prestera_acl_rule_entry_act_destruct(sw, e); + return -EINVAL; +} + +struct prestera_acl_rule_entry * +prestera_acl_rule_entry_create(struct prestera_acl *acl, + struct prestera_acl_rule_entry_key *key, + struct prestera_acl_rule_entry_arg *arg) +{ + struct prestera_acl_rule_entry *e; + int err; + + e = kzalloc(sizeof(*e), GFP_KERNEL); + if (!e) + goto err_kzalloc; + + memcpy(&e->key, key, sizeof(*key)); + e->vtcam_id = arg->vtcam_id; + err = __prestera_acl_rule_entry_act_construct(acl->sw, e, arg); + if (err) + goto err_act_construct; + + err = __prestera_acl_rule_entry2hw_add(acl->sw, e); + if (err) + goto err_hw_add; + + err = rhashtable_insert_fast(&acl->acl_rule_entry_ht, &e->ht_node, + __prestera_acl_rule_entry_ht_params); + if (err) + goto err_ht_insert; + + return e; + +err_ht_insert: + WARN_ON(__prestera_acl_rule_entry2hw_del(acl->sw, e)); +err_hw_add: + __prestera_acl_rule_entry_act_destruct(acl->sw, e); +err_act_construct: + kfree(e); +err_kzalloc: + return NULL; +} + +static int __prestera_acl_vtcam_id_try_fit(struct prestera_acl *acl, u8 lookup, + void *keymask, u32 *vtcam_id) +{ + struct prestera_acl_vtcam *vtcam; + int i; + + list_for_each_entry(vtcam, &acl->vtcam_list, list) { + if (lookup != vtcam->lookup) + continue; + + if (!keymask && !vtcam->is_keymask_set) + goto vtcam_found; + + if (!(keymask && vtcam->is_keymask_set)) + continue; + + /* try to fit with vtcam keymask */ + for (i = 0; i < __PRESTERA_ACL_RULE_MATCH_TYPE_MAX; i++) { + __be32 __keymask = ((__be32 *)keymask)[i]; + + if (!__keymask) + /* vtcam keymask in not interested */ + continue; + + if (__keymask & ~vtcam->keymask[i]) + /* keymask does not fit the vtcam keymask */ + break; + } + + if (i == __PRESTERA_ACL_RULE_MATCH_TYPE_MAX) + /* keymask fits vtcam keymask, return it */ + goto vtcam_found; + } + + /* nothing is found */ + return -ENOENT; + +vtcam_found: + refcount_inc(&vtcam->refcount); + *vtcam_id = vtcam->id; + return 0; +} + +int prestera_acl_vtcam_id_get(struct prestera_acl *acl, u8 lookup, u8 dir, + void *keymask, u32 *vtcam_id) +{ + struct prestera_acl_vtcam *vtcam; + u32 new_vtcam_id; + int err; + + /* find the vtcam that suits keymask. We do not expect to have + * a big number of vtcams, so, the list type for vtcam list is + * fine for now + */ + list_for_each_entry(vtcam, &acl->vtcam_list, list) { + if (lookup != vtcam->lookup || + dir != vtcam->direction) + continue; + + if (!keymask && !vtcam->is_keymask_set) { + refcount_inc(&vtcam->refcount); + goto vtcam_found; + } + + if (keymask && vtcam->is_keymask_set && + !memcmp(keymask, vtcam->keymask, sizeof(vtcam->keymask))) { + refcount_inc(&vtcam->refcount); + goto vtcam_found; + } + } + + /* vtcam not found, try to create new one */ + vtcam = kzalloc(sizeof(*vtcam), GFP_KERNEL); + if (!vtcam) + return -ENOMEM; + + err = prestera_hw_vtcam_create(acl->sw, lookup, keymask, &new_vtcam_id, + dir); + if (err) { + kfree(vtcam); + + /* cannot create new, try to fit into existing vtcam */ + if (__prestera_acl_vtcam_id_try_fit(acl, lookup, + keymask, &new_vtcam_id)) + return err; + + *vtcam_id = new_vtcam_id; + return 0; + } + + vtcam->direction = dir; + vtcam->id = new_vtcam_id; + vtcam->lookup = lookup; + if (keymask) { + memcpy(vtcam->keymask, keymask, sizeof(vtcam->keymask)); + vtcam->is_keymask_set = true; + } + refcount_set(&vtcam->refcount, 1); + list_add_rcu(&vtcam->list, &acl->vtcam_list); + +vtcam_found: + *vtcam_id = vtcam->id; + return 0; +} + +int prestera_acl_vtcam_id_put(struct prestera_acl *acl, u32 vtcam_id) +{ + struct prestera_acl_vtcam *vtcam; + int err; + + list_for_each_entry(vtcam, &acl->vtcam_list, list) { + if (vtcam_id != vtcam->id) + continue; + + if (!refcount_dec_and_test(&vtcam->refcount)) + return 0; + + err = prestera_hw_vtcam_destroy(acl->sw, vtcam->id); + if (err && err != -ENODEV) { + refcount_set(&vtcam->refcount, 1); + return err; + } + + list_del(&vtcam->list); + kfree(vtcam); + return 0; + } + + return -ENOENT; +} + +int prestera_acl_init(struct prestera_switch *sw) +{ + struct prestera_acl *acl; + int err; + + acl = kzalloc(sizeof(*acl), GFP_KERNEL); + if (!acl) + return -ENOMEM; + + acl->sw = sw; + INIT_LIST_HEAD(&acl->rules); + INIT_LIST_HEAD(&acl->vtcam_list); + idr_init(&acl->uid); + + err = rhashtable_init(&acl->acl_rule_entry_ht, + &__prestera_acl_rule_entry_ht_params); + if (err) + goto err_acl_rule_entry_ht_init; + + err = rhashtable_init(&acl->ruleset_ht, + &prestera_acl_ruleset_ht_params); + if (err) + goto err_ruleset_ht_init; + + sw->acl = acl; + + return 0; + +err_ruleset_ht_init: + rhashtable_destroy(&acl->acl_rule_entry_ht); +err_acl_rule_entry_ht_init: + kfree(acl); + return err; +} + +void prestera_acl_fini(struct prestera_switch *sw) +{ + struct prestera_acl *acl = sw->acl; + + WARN_ON(!idr_is_empty(&acl->uid)); + idr_destroy(&acl->uid); + + WARN_ON(!list_empty(&acl->vtcam_list)); + WARN_ON(!list_empty(&acl->rules)); + + rhashtable_destroy(&acl->ruleset_ht); + rhashtable_destroy(&acl->acl_rule_entry_ht); + + kfree(acl); +} -- cgit v1.2.3