From 78a8b760e40881c883c5552db991664727a91868 Mon Sep 17 00:00:00 2001 From: Jakub Kicinski Date: Wed, 25 Jul 2018 19:53:30 -0700 Subject: nfp: move repr handling on RX path Representor packets are received on PF queues with special metadata tag for demux. There is no reason to resolve the representor ID -> netdev after the skb has been allocated. Move the code, this will allow us to handle special FW messages without SKB allocation overhead. Signed-off-by: Jakub Kicinski Reviewed-by: Dirk van der Merwe Signed-off-by: Daniel Borkmann --- .../net/ethernet/netronome/nfp/nfp_net_common.c | 29 +++++++++++----------- 1 file changed, 15 insertions(+), 14 deletions(-) (limited to 'drivers/net') diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c index cf1704e972b7..cdfbd1e8bf4b 100644 --- a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c +++ b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c @@ -1757,6 +1757,21 @@ static int nfp_net_rx(struct nfp_net_rx_ring *rx_ring, int budget) } } + if (likely(!meta.portid)) { + netdev = dp->netdev; + } else { + struct nfp_net *nn; + + nn = netdev_priv(dp->netdev); + netdev = nfp_app_repr_get(nn->app, meta.portid); + if (unlikely(!netdev)) { + nfp_net_rx_drop(dp, r_vec, rx_ring, rxbuf, + NULL); + continue; + } + nfp_repr_inc_rx_stats(netdev, pkt_len); + } + skb = build_skb(rxbuf->frag, true_bufsz); if (unlikely(!skb)) { nfp_net_rx_drop(dp, r_vec, rx_ring, rxbuf, NULL); @@ -1772,20 +1787,6 @@ static int nfp_net_rx(struct nfp_net_rx_ring *rx_ring, int budget) nfp_net_rx_give_one(dp, rx_ring, new_frag, new_dma_addr); - if (likely(!meta.portid)) { - netdev = dp->netdev; - } else { - struct nfp_net *nn; - - nn = netdev_priv(dp->netdev); - netdev = nfp_app_repr_get(nn->app, meta.portid); - if (unlikely(!netdev)) { - nfp_net_rx_drop(dp, r_vec, rx_ring, NULL, skb); - continue; - } - nfp_repr_inc_rx_stats(netdev, pkt_len); - } - skb_reserve(skb, pkt_off); skb_put(skb, pkt_len); -- cgit From 79ca38e80c4588adeb11a0abd116d72ab6fe0ecc Mon Sep 17 00:00:00 2001 From: Jakub Kicinski Date: Wed, 25 Jul 2018 19:53:31 -0700 Subject: nfp: allow control message reception on data queues Port id 0xffffffff is reserved for control messages. Allow reception of messages with this id on data queues. Hand off a raw buffer to the higher layer code, without allocating SKB for max efficiency. The RX handle can't modify or keep the buffer, after it returns buffer is handed back over to the NIC RX free buffer list. Signed-off-by: Jakub Kicinski Reviewed-by: Dirk van der Merwe Signed-off-by: Daniel Borkmann --- drivers/net/ethernet/netronome/nfp/nfp_app.c | 2 ++ drivers/net/ethernet/netronome/nfp/nfp_app.h | 17 +++++++++++++++++ drivers/net/ethernet/netronome/nfp/nfp_net_common.c | 11 +++++++++++ drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.h | 1 + 4 files changed, 31 insertions(+) (limited to 'drivers/net') diff --git a/drivers/net/ethernet/netronome/nfp/nfp_app.c b/drivers/net/ethernet/netronome/nfp/nfp_app.c index 69d4ae7a61f3..8607d09ab732 100644 --- a/drivers/net/ethernet/netronome/nfp/nfp_app.c +++ b/drivers/net/ethernet/netronome/nfp/nfp_app.c @@ -172,6 +172,8 @@ struct nfp_app *nfp_app_alloc(struct nfp_pf *pf, enum nfp_app_id id) if (WARN_ON(!apps[id]->name || !apps[id]->vnic_alloc)) return ERR_PTR(-EINVAL); + if (WARN_ON(!apps[id]->ctrl_msg_rx && apps[id]->ctrl_msg_rx_raw)) + return ERR_PTR(-EINVAL); app = kzalloc(sizeof(*app), GFP_KERNEL); if (!app) diff --git a/drivers/net/ethernet/netronome/nfp/nfp_app.h b/drivers/net/ethernet/netronome/nfp/nfp_app.h index afbc19aa66a8..ccb244cf6c30 100644 --- a/drivers/net/ethernet/netronome/nfp/nfp_app.h +++ b/drivers/net/ethernet/netronome/nfp/nfp_app.h @@ -98,6 +98,7 @@ extern const struct nfp_app_type app_abm; * @start: start application logic * @stop: stop application logic * @ctrl_msg_rx: control message handler + * @ctrl_msg_rx_raw: handler for control messages from data queues * @setup_tc: setup TC ndo * @bpf: BPF ndo offload-related calls * @xdp_offload: offload an XDP program @@ -150,6 +151,8 @@ struct nfp_app_type { void (*stop)(struct nfp_app *app); void (*ctrl_msg_rx)(struct nfp_app *app, struct sk_buff *skb); + void (*ctrl_msg_rx_raw)(struct nfp_app *app, const void *data, + unsigned int len); int (*setup_tc)(struct nfp_app *app, struct net_device *netdev, enum tc_setup_type type, void *type_data); @@ -318,6 +321,11 @@ static inline bool nfp_app_ctrl_has_meta(struct nfp_app *app) return app->type->ctrl_has_meta; } +static inline bool nfp_app_ctrl_uses_data_vnics(struct nfp_app *app) +{ + return app && app->type->ctrl_msg_rx_raw; +} + static inline const char *nfp_app_extra_cap(struct nfp_app *app, struct nfp_net *nn) { @@ -381,6 +389,15 @@ static inline void nfp_app_ctrl_rx(struct nfp_app *app, struct sk_buff *skb) app->type->ctrl_msg_rx(app, skb); } +static inline void +nfp_app_ctrl_rx_raw(struct nfp_app *app, const void *data, unsigned int len) +{ + trace_devlink_hwmsg(priv_to_devlink(app->pf), true, 0, data, len); + + if (app && app->type->ctrl_msg_rx_raw) + app->type->ctrl_msg_rx_raw(app, data, len); +} + static inline int nfp_app_eswitch_mode_get(struct nfp_app *app, u16 *mode) { if (!app->type->eswitch_mode_get) diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c index cdfbd1e8bf4b..ca42f7da4f50 100644 --- a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c +++ b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c @@ -1759,6 +1759,14 @@ static int nfp_net_rx(struct nfp_net_rx_ring *rx_ring, int budget) if (likely(!meta.portid)) { netdev = dp->netdev; + } else if (meta.portid == NFP_META_PORT_ID_CTRL) { + struct nfp_net *nn = netdev_priv(dp->netdev); + + nfp_app_ctrl_rx_raw(nn->app, rxbuf->frag + pkt_off, + pkt_len); + nfp_net_rx_give_one(dp, rx_ring, rxbuf->frag, + rxbuf->dma_addr); + continue; } else { struct nfp_net *nn; @@ -3857,6 +3865,9 @@ int nfp_net_init(struct nfp_net *nn) nn->dp.mtu = NFP_NET_DEFAULT_MTU; nn->dp.fl_bufsz = nfp_net_calc_fl_bufsz(&nn->dp); + if (nfp_app_ctrl_uses_data_vnics(nn->app)) + nn->dp.ctrl |= nn->cap & NFP_NET_CFG_CTRL_CMSG_DATA; + if (nn->cap & NFP_NET_CFG_CTRL_RSS_ANY) { nfp_net_rss_init(nn); nn->dp.ctrl |= nn->cap & NFP_NET_CFG_CTRL_RSS2 ?: diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.h b/drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.h index bb63c115537d..44d3ea75d043 100644 --- a/drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.h +++ b/drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.h @@ -127,6 +127,7 @@ #define NFP_NET_CFG_CTRL_GATHER (0x1 << 9) /* Gather DMA */ #define NFP_NET_CFG_CTRL_LSO (0x1 << 10) /* LSO/TSO (version 1) */ #define NFP_NET_CFG_CTRL_CTAG_FILTER (0x1 << 11) /* VLAN CTAG filtering */ +#define NFP_NET_CFG_CTRL_CMSG_DATA (0x1 << 12) /* RX cmsgs on data Qs */ #define NFP_NET_CFG_CTRL_RINGCFG (0x1 << 16) /* Ring runtime changes */ #define NFP_NET_CFG_CTRL_RSS (0x1 << 17) /* RSS (version 1) */ #define NFP_NET_CFG_CTRL_IRQMOD (0x1 << 18) /* Interrupt moderation */ -- cgit From 20c54204219987d620ca9da567dd54e569863dad Mon Sep 17 00:00:00 2001 From: Jakub Kicinski Date: Wed, 25 Jul 2018 19:53:32 -0700 Subject: nfp: bpf: pass raw data buffer to nfp_bpf_event_output() In preparation for SKB-less perf event handling make nfp_bpf_event_output() take buffer address and length, not SKB as parameters. Signed-off-by: Jakub Kicinski Reviewed-by: Dirk van der Merwe Reviewed-by: Quentin Monnet Signed-off-by: Daniel Borkmann --- drivers/net/ethernet/netronome/nfp/bpf/cmsg.c | 5 ++++- drivers/net/ethernet/netronome/nfp/bpf/main.h | 3 ++- drivers/net/ethernet/netronome/nfp/bpf/offload.c | 21 +++++++++------------ 3 files changed, 15 insertions(+), 14 deletions(-) (limited to 'drivers/net') diff --git a/drivers/net/ethernet/netronome/nfp/bpf/cmsg.c b/drivers/net/ethernet/netronome/nfp/bpf/cmsg.c index cb87fccb9f6a..0a89b53962aa 100644 --- a/drivers/net/ethernet/netronome/nfp/bpf/cmsg.c +++ b/drivers/net/ethernet/netronome/nfp/bpf/cmsg.c @@ -441,7 +441,10 @@ void nfp_bpf_ctrl_msg_rx(struct nfp_app *app, struct sk_buff *skb) } if (nfp_bpf_cmsg_get_type(skb) == CMSG_TYPE_BPF_EVENT) { - nfp_bpf_event_output(bpf, skb); + if (!nfp_bpf_event_output(bpf, skb->data, skb->len)) + dev_consume_skb_any(skb); + else + dev_kfree_skb_any(skb); return; } diff --git a/drivers/net/ethernet/netronome/nfp/bpf/main.h b/drivers/net/ethernet/netronome/nfp/bpf/main.h index bec935468f90..e25d3c0c7e43 100644 --- a/drivers/net/ethernet/netronome/nfp/bpf/main.h +++ b/drivers/net/ethernet/netronome/nfp/bpf/main.h @@ -501,7 +501,8 @@ int nfp_bpf_ctrl_lookup_entry(struct bpf_offloaded_map *offmap, int nfp_bpf_ctrl_getnext_entry(struct bpf_offloaded_map *offmap, void *key, void *next_key); -int nfp_bpf_event_output(struct nfp_app_bpf *bpf, struct sk_buff *skb); +int nfp_bpf_event_output(struct nfp_app_bpf *bpf, const void *data, + unsigned int len); void nfp_bpf_ctrl_msg_rx(struct nfp_app *app, struct sk_buff *skb); #endif diff --git a/drivers/net/ethernet/netronome/nfp/bpf/offload.c b/drivers/net/ethernet/netronome/nfp/bpf/offload.c index 49b03f7dbf46..293dda84818f 100644 --- a/drivers/net/ethernet/netronome/nfp/bpf/offload.c +++ b/drivers/net/ethernet/netronome/nfp/bpf/offload.c @@ -453,23 +453,24 @@ nfp_bpf_perf_event_copy(void *dst, const void *src, return 0; } -int nfp_bpf_event_output(struct nfp_app_bpf *bpf, struct sk_buff *skb) +int nfp_bpf_event_output(struct nfp_app_bpf *bpf, const void *data, + unsigned int len) { - struct cmsg_bpf_event *cbe = (void *)skb->data; + struct cmsg_bpf_event *cbe = (void *)data; u32 pkt_size, data_size; struct bpf_map *map; - if (skb->len < sizeof(struct cmsg_bpf_event)) - goto err_drop; + if (len < sizeof(struct cmsg_bpf_event)) + return -EINVAL; pkt_size = be32_to_cpu(cbe->pkt_size); data_size = be32_to_cpu(cbe->data_size); map = (void *)(unsigned long)be64_to_cpu(cbe->map_ptr); - if (skb->len < sizeof(struct cmsg_bpf_event) + pkt_size + data_size) - goto err_drop; + if (len < sizeof(struct cmsg_bpf_event) + pkt_size + data_size) + return -EINVAL; if (cbe->hdr.ver != CMSG_MAP_ABI_VERSION) - goto err_drop; + return -EINVAL; rcu_read_lock(); if (!rhashtable_lookup_fast(&bpf->maps_neutral, &map, @@ -477,7 +478,7 @@ int nfp_bpf_event_output(struct nfp_app_bpf *bpf, struct sk_buff *skb) rcu_read_unlock(); pr_warn("perf event: dest map pointer %px not recognized, dropping event\n", map); - goto err_drop; + return -EINVAL; } bpf_event_output(map, be32_to_cpu(cbe->cpu_id), @@ -485,11 +486,7 @@ int nfp_bpf_event_output(struct nfp_app_bpf *bpf, struct sk_buff *skb) cbe->data, pkt_size, nfp_bpf_perf_event_copy); rcu_read_unlock(); - dev_consume_skb_any(skb); return 0; -err_drop: - dev_kfree_skb_any(skb); - return -EINVAL; } static int -- cgit From 0958762748e4cfeb19d881aa8d3fe5ba8b5bc50b Mon Sep 17 00:00:00 2001 From: Jakub Kicinski Date: Wed, 25 Jul 2018 19:53:33 -0700 Subject: nfp: bpf: allow receiving perf events on data queues Control queue is fairly low latency, and requires SKB allocations, which means we can't even reach 0.5Msps with perf events. Allow perf events to be delivered to data queues. This allows us to not only use multiple queues, but also receive and deliver to user space more than 5Msps per queue (Xeon E5-2630 v4 2.20GHz, no retpolines). Signed-off-by: Jakub Kicinski Reviewed-by: Dirk van der Merwe Reviewed-by: Quentin Monnet Signed-off-by: Daniel Borkmann --- drivers/net/ethernet/netronome/nfp/bpf/cmsg.c | 18 ++++++++++++++++++ drivers/net/ethernet/netronome/nfp/bpf/main.c | 1 + drivers/net/ethernet/netronome/nfp/bpf/main.h | 3 +++ 3 files changed, 22 insertions(+) (limited to 'drivers/net') diff --git a/drivers/net/ethernet/netronome/nfp/bpf/cmsg.c b/drivers/net/ethernet/netronome/nfp/bpf/cmsg.c index 0a89b53962aa..1946291bf4fd 100644 --- a/drivers/net/ethernet/netronome/nfp/bpf/cmsg.c +++ b/drivers/net/ethernet/netronome/nfp/bpf/cmsg.c @@ -468,3 +468,21 @@ err_unlock: err_free: dev_kfree_skb_any(skb); } + +void +nfp_bpf_ctrl_msg_rx_raw(struct nfp_app *app, const void *data, unsigned int len) +{ + struct nfp_app_bpf *bpf = app->priv; + const struct cmsg_hdr *hdr = data; + + if (unlikely(len < sizeof(struct cmsg_reply_map_simple))) { + cmsg_warn(bpf, "cmsg drop - too short %d!\n", len); + return; + } + + if (hdr->type == CMSG_TYPE_BPF_EVENT) + nfp_bpf_event_output(bpf, data, len); + else + cmsg_warn(bpf, "cmsg drop - msg type %d with raw buffer!\n", + hdr->type); +} diff --git a/drivers/net/ethernet/netronome/nfp/bpf/main.c b/drivers/net/ethernet/netronome/nfp/bpf/main.c index 994d2b756fe1..192e88981fb2 100644 --- a/drivers/net/ethernet/netronome/nfp/bpf/main.c +++ b/drivers/net/ethernet/netronome/nfp/bpf/main.c @@ -490,6 +490,7 @@ const struct nfp_app_type app_bpf = { .vnic_free = nfp_bpf_vnic_free, .ctrl_msg_rx = nfp_bpf_ctrl_msg_rx, + .ctrl_msg_rx_raw = nfp_bpf_ctrl_msg_rx_raw, .setup_tc = nfp_bpf_setup_tc, .bpf = nfp_ndo_bpf, diff --git a/drivers/net/ethernet/netronome/nfp/bpf/main.h b/drivers/net/ethernet/netronome/nfp/bpf/main.h index e25d3c0c7e43..017e0ae5e736 100644 --- a/drivers/net/ethernet/netronome/nfp/bpf/main.h +++ b/drivers/net/ethernet/netronome/nfp/bpf/main.h @@ -505,4 +505,7 @@ int nfp_bpf_event_output(struct nfp_app_bpf *bpf, const void *data, unsigned int len); void nfp_bpf_ctrl_msg_rx(struct nfp_app *app, struct sk_buff *skb); +void +nfp_bpf_ctrl_msg_rx_raw(struct nfp_app *app, const void *data, + unsigned int len); #endif -- cgit From ab01f4ac5faf6a0ea532fa65cf6b1c9b2019e49b Mon Sep 17 00:00:00 2001 From: Jakub Kicinski Date: Wed, 25 Jul 2018 19:53:34 -0700 Subject: nfp: bpf: remember maps by ID Record perf maps by map ID, not raw kernel pointer. This helps with debug messages, because printing pointers to logs is frowned upon, and makes debug easier for the users, as map ID is something they should be more familiar with. Note that perf maps are offload neutral, therefore IDs won't be orphaned. While at it use a rate limited print helper for the error message. Reported-by: Kees Cook Signed-off-by: Jakub Kicinski Reviewed-by: Dirk van der Merwe Reviewed-by: Quentin Monnet Signed-off-by: Daniel Borkmann --- drivers/net/ethernet/netronome/nfp/bpf/cmsg.c | 2 -- drivers/net/ethernet/netronome/nfp/bpf/jit.c | 12 ++++++++---- drivers/net/ethernet/netronome/nfp/bpf/main.c | 4 ++-- drivers/net/ethernet/netronome/nfp/bpf/main.h | 3 +++ drivers/net/ethernet/netronome/nfp/bpf/offload.c | 22 +++++++++++++--------- 5 files changed, 26 insertions(+), 17 deletions(-) (limited to 'drivers/net') diff --git a/drivers/net/ethernet/netronome/nfp/bpf/cmsg.c b/drivers/net/ethernet/netronome/nfp/bpf/cmsg.c index 1946291bf4fd..2572a4b91c7c 100644 --- a/drivers/net/ethernet/netronome/nfp/bpf/cmsg.c +++ b/drivers/net/ethernet/netronome/nfp/bpf/cmsg.c @@ -43,8 +43,6 @@ #include "fw.h" #include "main.h" -#define cmsg_warn(bpf, msg...) nn_dp_warn(&(bpf)->app->ctrl->dp, msg) - #define NFP_BPF_TAG_ALLOC_SPAN (U16_MAX / 4) static bool nfp_bpf_all_tags_busy(struct nfp_app_bpf *bpf) diff --git a/drivers/net/ethernet/netronome/nfp/bpf/jit.c b/drivers/net/ethernet/netronome/nfp/bpf/jit.c index 1d9e36835404..3c22d27de9da 100644 --- a/drivers/net/ethernet/netronome/nfp/bpf/jit.c +++ b/drivers/net/ethernet/netronome/nfp/bpf/jit.c @@ -3883,6 +3883,7 @@ static int nfp_bpf_replace_map_ptrs(struct nfp_prog *nfp_prog) struct nfp_insn_meta *meta1, *meta2; struct nfp_bpf_map *nfp_map; struct bpf_map *map; + u32 id; nfp_for_each_insn_walk2(nfp_prog, meta1, meta2) { if (meta1->skip || meta2->skip) @@ -3894,11 +3895,14 @@ static int nfp_bpf_replace_map_ptrs(struct nfp_prog *nfp_prog) map = (void *)(unsigned long)((u32)meta1->insn.imm | (u64)meta2->insn.imm << 32); - if (bpf_map_offload_neutral(map)) - continue; - nfp_map = map_to_offmap(map)->dev_priv; + if (bpf_map_offload_neutral(map)) { + id = map->id; + } else { + nfp_map = map_to_offmap(map)->dev_priv; + id = nfp_map->tid; + } - meta1->insn.imm = nfp_map->tid; + meta1->insn.imm = id; meta2->insn.imm = 0; } diff --git a/drivers/net/ethernet/netronome/nfp/bpf/main.c b/drivers/net/ethernet/netronome/nfp/bpf/main.c index 192e88981fb2..cce1d2945a32 100644 --- a/drivers/net/ethernet/netronome/nfp/bpf/main.c +++ b/drivers/net/ethernet/netronome/nfp/bpf/main.c @@ -45,8 +45,8 @@ const struct rhashtable_params nfp_bpf_maps_neutral_params = { .nelem_hint = 4, - .key_len = FIELD_SIZEOF(struct nfp_bpf_neutral_map, ptr), - .key_offset = offsetof(struct nfp_bpf_neutral_map, ptr), + .key_len = FIELD_SIZEOF(struct bpf_map, id), + .key_offset = offsetof(struct nfp_bpf_neutral_map, map_id), .head_offset = offsetof(struct nfp_bpf_neutral_map, l), .automatic_shrinking = true, }; diff --git a/drivers/net/ethernet/netronome/nfp/bpf/main.h b/drivers/net/ethernet/netronome/nfp/bpf/main.h index 017e0ae5e736..57573bfa8c03 100644 --- a/drivers/net/ethernet/netronome/nfp/bpf/main.h +++ b/drivers/net/ethernet/netronome/nfp/bpf/main.h @@ -47,6 +47,8 @@ #include "../nfp_asm.h" #include "fw.h" +#define cmsg_warn(bpf, msg...) nn_dp_warn(&(bpf)->app->ctrl->dp, msg) + /* For relocation logic use up-most byte of branch instruction as scratch * area. Remember to clear this before sending instructions to HW! */ @@ -221,6 +223,7 @@ struct nfp_bpf_map { struct nfp_bpf_neutral_map { struct rhash_head l; struct bpf_map *ptr; + u32 map_id; u32 count; }; diff --git a/drivers/net/ethernet/netronome/nfp/bpf/offload.c b/drivers/net/ethernet/netronome/nfp/bpf/offload.c index 293dda84818f..b1fbb3babc7f 100644 --- a/drivers/net/ethernet/netronome/nfp/bpf/offload.c +++ b/drivers/net/ethernet/netronome/nfp/bpf/offload.c @@ -67,7 +67,7 @@ nfp_map_ptr_record(struct nfp_app_bpf *bpf, struct nfp_prog *nfp_prog, ASSERT_RTNL(); /* Reuse path - other offloaded program is already tracking this map. */ - record = rhashtable_lookup_fast(&bpf->maps_neutral, &map, + record = rhashtable_lookup_fast(&bpf->maps_neutral, &map->id, nfp_bpf_maps_neutral_params); if (record) { nfp_prog->map_records[nfp_prog->map_records_cnt++] = record; @@ -89,6 +89,7 @@ nfp_map_ptr_record(struct nfp_app_bpf *bpf, struct nfp_prog *nfp_prog, } record->ptr = map; + record->map_id = map->id; record->count = 1; err = rhashtable_insert_fast(&bpf->maps_neutral, &record->l, @@ -457,15 +458,17 @@ int nfp_bpf_event_output(struct nfp_app_bpf *bpf, const void *data, unsigned int len) { struct cmsg_bpf_event *cbe = (void *)data; - u32 pkt_size, data_size; - struct bpf_map *map; + struct nfp_bpf_neutral_map *record; + u32 pkt_size, data_size, map_id; + u64 map_id_full; if (len < sizeof(struct cmsg_bpf_event)) return -EINVAL; pkt_size = be32_to_cpu(cbe->pkt_size); data_size = be32_to_cpu(cbe->data_size); - map = (void *)(unsigned long)be64_to_cpu(cbe->map_ptr); + map_id_full = be64_to_cpu(cbe->map_ptr); + map_id = map_id_full; if (len < sizeof(struct cmsg_bpf_event) + pkt_size + data_size) return -EINVAL; @@ -473,15 +476,16 @@ int nfp_bpf_event_output(struct nfp_app_bpf *bpf, const void *data, return -EINVAL; rcu_read_lock(); - if (!rhashtable_lookup_fast(&bpf->maps_neutral, &map, - nfp_bpf_maps_neutral_params)) { + record = rhashtable_lookup_fast(&bpf->maps_neutral, &map_id, + nfp_bpf_maps_neutral_params); + if (!record || map_id_full > U32_MAX) { rcu_read_unlock(); - pr_warn("perf event: dest map pointer %px not recognized, dropping event\n", - map); + cmsg_warn(bpf, "perf event: map id %lld (0x%llx) not recognized, dropping event\n", + map_id_full, map_id_full); return -EINVAL; } - bpf_event_output(map, be32_to_cpu(cbe->cpu_id), + bpf_event_output(record->ptr, be32_to_cpu(cbe->cpu_id), &cbe->data[round_up(pkt_size, 4)], data_size, cbe->data, pkt_size, nfp_bpf_perf_event_copy); rcu_read_unlock(); -- cgit From 17082566a9d2d05eefa3a5d6d968aa1d4b87c73d Mon Sep 17 00:00:00 2001 From: Jakub Kicinski Date: Wed, 25 Jul 2018 19:53:35 -0700 Subject: nfp: bpf: improve map offload info messages FW can put constraints on map element size to maximize resource use and efficiency. When user attempts offload of a map which does not fit into those constraints an informational message is printed to kernel logs to inform user about the reason offload failed. Map offload does not have access to any advanced error reporting like verifier log or extack. There is also currently no way for us to nicely expose the FW capabilities to user space. Given all those constraints we should make sure log messages are as informative as possible. Improve them. Signed-off-by: Jakub Kicinski Reviewed-by: Dirk van der Merwe Signed-off-by: Daniel Borkmann --- drivers/net/ethernet/netronome/nfp/bpf/offload.c | 20 ++++++++++++++++---- 1 file changed, 16 insertions(+), 4 deletions(-) (limited to 'drivers/net') diff --git a/drivers/net/ethernet/netronome/nfp/bpf/offload.c b/drivers/net/ethernet/netronome/nfp/bpf/offload.c index b1fbb3babc7f..1ccd6371a15b 100644 --- a/drivers/net/ethernet/netronome/nfp/bpf/offload.c +++ b/drivers/net/ethernet/netronome/nfp/bpf/offload.c @@ -380,11 +380,23 @@ nfp_bpf_map_alloc(struct nfp_app_bpf *bpf, struct bpf_offloaded_map *offmap) bpf->maps.max_elems - bpf->map_elems_in_use); return -ENOMEM; } - if (offmap->map.key_size > bpf->maps.max_key_sz || - offmap->map.value_size > bpf->maps.max_val_sz || - round_up(offmap->map.key_size, 8) + + + if (round_up(offmap->map.key_size, 8) + round_up(offmap->map.value_size, 8) > bpf->maps.max_elem_sz) { - pr_info("elements don't fit in device constraints\n"); + pr_info("map elements too large: %u, FW max element size (key+value): %u\n", + round_up(offmap->map.key_size, 8) + + round_up(offmap->map.value_size, 8), + bpf->maps.max_elem_sz); + return -ENOMEM; + } + if (offmap->map.key_size > bpf->maps.max_key_sz) { + pr_info("map key size %u, FW max is %u\n", + offmap->map.key_size, bpf->maps.max_key_sz); + return -ENOMEM; + } + if (offmap->map.value_size > bpf->maps.max_val_sz) { + pr_info("map value size %u, FW max is %u\n", + offmap->map.value_size, bpf->maps.max_val_sz); return -ENOMEM; } -- cgit From 240b74fde35293f718c6cdfa486b3a005c4243c9 Mon Sep 17 00:00:00 2001 From: Jakub Kicinski Date: Mon, 30 Jul 2018 20:33:15 -0700 Subject: nfp: fix variable dereferenced before check in nfp_app_ctrl_rx_raw() 'app' is dereferenced before used for the devlink trace point. In case FW is buggy and sends a control message to a VF queue we should make sure app is not NULL. Reported-by: Dan Carpenter Signed-off-by: Jakub Kicinski Reviewed-by: Dirk van der Merwe Signed-off-by: Daniel Borkmann --- drivers/net/ethernet/netronome/nfp/nfp_app.h | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) (limited to 'drivers/net') diff --git a/drivers/net/ethernet/netronome/nfp/nfp_app.h b/drivers/net/ethernet/netronome/nfp/nfp_app.h index ccb244cf6c30..4e1eb3395648 100644 --- a/drivers/net/ethernet/netronome/nfp/nfp_app.h +++ b/drivers/net/ethernet/netronome/nfp/nfp_app.h @@ -392,10 +392,11 @@ static inline void nfp_app_ctrl_rx(struct nfp_app *app, struct sk_buff *skb) static inline void nfp_app_ctrl_rx_raw(struct nfp_app *app, const void *data, unsigned int len) { - trace_devlink_hwmsg(priv_to_devlink(app->pf), true, 0, data, len); + if (!app || !app->type->ctrl_msg_rx_raw) + return; - if (app && app->type->ctrl_msg_rx_raw) - app->type->ctrl_msg_rx_raw(app, data, len); + trace_devlink_hwmsg(priv_to_devlink(app->pf), true, 0, data, len); + app->type->ctrl_msg_rx_raw(app, data, len); } static inline int nfp_app_eswitch_mode_get(struct nfp_app *app, u16 *mode) -- cgit From 0c26159352ba1cdc5a8c8d74131cc19cdfdf9371 Mon Sep 17 00:00:00 2001 From: Jakub Kicinski Date: Fri, 3 Aug 2018 22:06:00 -0700 Subject: nfp: bpf: xdp_adjust_tail support Add support for adjust_tail. There are no FW changes needed but add a FW capability just in case there would be any issue with previously released FW, or we will have to change the ABI in the future. The helper is trivial and shouldn't be used too often so just inline the body of the function. We add the delta to locally maintained packet length register and check for overflow, since add of negative value must overflow if result is positive. Note that if delta of 0 would be allowed in the kernel this trick stops working and we need one more instruction to compare lengths before and after the change. Signed-off-by: Jakub Kicinski Reviewed-by: Quentin Monnet Signed-off-by: Daniel Borkmann --- drivers/net/ethernet/netronome/nfp/bpf/fw.h | 1 + drivers/net/ethernet/netronome/nfp/bpf/jit.c | 47 +++++++++++++++++++++++ drivers/net/ethernet/netronome/nfp/bpf/main.c | 13 +++++++ drivers/net/ethernet/netronome/nfp/bpf/main.h | 2 + drivers/net/ethernet/netronome/nfp/bpf/verifier.c | 7 ++++ drivers/net/ethernet/netronome/nfp/nfp_asm.h | 1 + 6 files changed, 71 insertions(+) (limited to 'drivers/net') diff --git a/drivers/net/ethernet/netronome/nfp/bpf/fw.h b/drivers/net/ethernet/netronome/nfp/bpf/fw.h index 4c7972e3db63..e4f9b7ec8528 100644 --- a/drivers/net/ethernet/netronome/nfp/bpf/fw.h +++ b/drivers/net/ethernet/netronome/nfp/bpf/fw.h @@ -51,6 +51,7 @@ enum bpf_cap_tlv_type { NFP_BPF_CAP_TYPE_MAPS = 3, NFP_BPF_CAP_TYPE_RANDOM = 4, NFP_BPF_CAP_TYPE_QUEUE_SELECT = 5, + NFP_BPF_CAP_TYPE_ADJUST_TAIL = 6, }; struct nfp_bpf_cap_tlv_func { diff --git a/drivers/net/ethernet/netronome/nfp/bpf/jit.c b/drivers/net/ethernet/netronome/nfp/bpf/jit.c index 3c22d27de9da..eff57f7d056a 100644 --- a/drivers/net/ethernet/netronome/nfp/bpf/jit.c +++ b/drivers/net/ethernet/netronome/nfp/bpf/jit.c @@ -1642,6 +1642,51 @@ static int adjust_head(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) return 0; } +static int adjust_tail(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) +{ + u32 ret_einval, end; + swreg plen, delta; + + BUILD_BUG_ON(plen_reg(nfp_prog) != reg_b(STATIC_REG_PKT_LEN)); + + plen = imm_a(nfp_prog); + delta = reg_a(2 * 2); + + ret_einval = nfp_prog_current_offset(nfp_prog) + 9; + end = nfp_prog_current_offset(nfp_prog) + 11; + + /* Calculate resulting length */ + emit_alu(nfp_prog, plen, plen_reg(nfp_prog), ALU_OP_ADD, delta); + /* delta == 0 is not allowed by the kernel, add must overflow to make + * length smaller. + */ + emit_br(nfp_prog, BR_BCC, ret_einval, 0); + + /* if (new_len < 14) then -EINVAL */ + emit_alu(nfp_prog, reg_none(), plen, ALU_OP_SUB, reg_imm(ETH_HLEN)); + emit_br(nfp_prog, BR_BMI, ret_einval, 0); + + emit_alu(nfp_prog, plen_reg(nfp_prog), + plen_reg(nfp_prog), ALU_OP_ADD, delta); + emit_alu(nfp_prog, pv_len(nfp_prog), + pv_len(nfp_prog), ALU_OP_ADD, delta); + + emit_br(nfp_prog, BR_UNC, end, 2); + wrp_immed(nfp_prog, reg_both(0), 0); + wrp_immed(nfp_prog, reg_both(1), 0); + + if (!nfp_prog_confirm_current_offset(nfp_prog, ret_einval)) + return -EINVAL; + + wrp_immed(nfp_prog, reg_both(0), -22); + wrp_immed(nfp_prog, reg_both(1), ~0); + + if (!nfp_prog_confirm_current_offset(nfp_prog, end)) + return -EINVAL; + + return 0; +} + static int map_call_stack_common(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) { @@ -3041,6 +3086,8 @@ static int call(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) switch (meta->insn.imm) { case BPF_FUNC_xdp_adjust_head: return adjust_head(nfp_prog, meta); + case BPF_FUNC_xdp_adjust_tail: + return adjust_tail(nfp_prog, meta); case BPF_FUNC_map_lookup_elem: case BPF_FUNC_map_update_elem: case BPF_FUNC_map_delete_elem: diff --git a/drivers/net/ethernet/netronome/nfp/bpf/main.c b/drivers/net/ethernet/netronome/nfp/bpf/main.c index cce1d2945a32..970af07f4656 100644 --- a/drivers/net/ethernet/netronome/nfp/bpf/main.c +++ b/drivers/net/ethernet/netronome/nfp/bpf/main.c @@ -334,6 +334,14 @@ nfp_bpf_parse_cap_qsel(struct nfp_app_bpf *bpf, void __iomem *value, u32 length) return 0; } +static int +nfp_bpf_parse_cap_adjust_tail(struct nfp_app_bpf *bpf, void __iomem *value, + u32 length) +{ + bpf->adjust_tail = true; + return 0; +} + static int nfp_bpf_parse_capabilities(struct nfp_app *app) { struct nfp_cpp *cpp = app->pf->cpp; @@ -380,6 +388,11 @@ static int nfp_bpf_parse_capabilities(struct nfp_app *app) if (nfp_bpf_parse_cap_qsel(app->priv, value, length)) goto err_release_free; break; + case NFP_BPF_CAP_TYPE_ADJUST_TAIL: + if (nfp_bpf_parse_cap_adjust_tail(app->priv, value, + length)) + goto err_release_free; + break; default: nfp_dbg(cpp, "unknown BPF capability: %d\n", type); break; diff --git a/drivers/net/ethernet/netronome/nfp/bpf/main.h b/drivers/net/ethernet/netronome/nfp/bpf/main.h index 57573bfa8c03..dbd00982fd2b 100644 --- a/drivers/net/ethernet/netronome/nfp/bpf/main.h +++ b/drivers/net/ethernet/netronome/nfp/bpf/main.h @@ -150,6 +150,7 @@ enum pkt_vec { * * @pseudo_random: FW initialized the pseudo-random machinery (CSRs) * @queue_select: BPF can set the RX queue ID in packet vector + * @adjust_tail: BPF can simply trunc packet size for adjust tail */ struct nfp_app_bpf { struct nfp_app *app; @@ -195,6 +196,7 @@ struct nfp_app_bpf { bool pseudo_random; bool queue_select; + bool adjust_tail; }; enum nfp_bpf_map_use { diff --git a/drivers/net/ethernet/netronome/nfp/bpf/verifier.c b/drivers/net/ethernet/netronome/nfp/bpf/verifier.c index 49ba0d645d36..a6e9248669e1 100644 --- a/drivers/net/ethernet/netronome/nfp/bpf/verifier.c +++ b/drivers/net/ethernet/netronome/nfp/bpf/verifier.c @@ -178,6 +178,13 @@ nfp_bpf_check_call(struct nfp_prog *nfp_prog, struct bpf_verifier_env *env, nfp_record_adjust_head(bpf, nfp_prog, meta, reg2); break; + case BPF_FUNC_xdp_adjust_tail: + if (!bpf->adjust_tail) { + pr_vlog(env, "adjust_tail not supported by FW\n"); + return -EOPNOTSUPP; + } + break; + case BPF_FUNC_map_lookup_elem: if (!nfp_bpf_map_call_ok("map_lookup", env, meta, bpf->helpers.map_lookup, reg1) || diff --git a/drivers/net/ethernet/netronome/nfp/nfp_asm.h b/drivers/net/ethernet/netronome/nfp/nfp_asm.h index cdc4e065f6f5..fad0e62a910c 100644 --- a/drivers/net/ethernet/netronome/nfp/nfp_asm.h +++ b/drivers/net/ethernet/netronome/nfp/nfp_asm.h @@ -93,6 +93,7 @@ enum br_mask { BR_BNE = 0x01, BR_BMI = 0x02, BR_BHS = 0x04, + BR_BCC = 0x05, BR_BLO = 0x05, BR_BGE = 0x08, BR_BLT = 0x09, -- cgit