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author | Linus Torvalds | 2019-05-09 18:02:46 +0200 |
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committer | Linus Torvalds | 2019-05-09 18:02:46 +0200 |
commit | dce45af5c2e9e85f22578f2f8065f225f5d11764 (patch) | |
tree | e01e7a294586c3074142fb485516ce718a1a82d2 /samples/bpf/ibumad_kern.c | |
parent | Merge tag 'dmaengine-5.2-rc1' of git://git.infradead.org/users/vkoul/slave-dma (diff) | |
parent | RDMA/ipoib: Allow user space differentiate between valid dev_port (diff) | |
download | kernel-qcow2-linux-dce45af5c2e9e85f22578f2f8065f225f5d11764.tar.gz kernel-qcow2-linux-dce45af5c2e9e85f22578f2f8065f225f5d11764.tar.xz kernel-qcow2-linux-dce45af5c2e9e85f22578f2f8065f225f5d11764.zip |
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma
Pull rdma updates from Jason Gunthorpe:
"This has been a smaller cycle than normal. One new driver was
accepted, which is unusual, and at least one more driver remains in
review on the list.
Summary:
- Driver fixes for hns, hfi1, nes, rxe, i40iw, mlx5, cxgb4,
vmw_pvrdma
- Many patches from MatthewW converting radix tree and IDR users to
use xarray
- Introduction of tracepoints to the MAD layer
- Build large SGLs at the start for DMA mapping and get the driver to
split them
- Generally clean SGL handling code throughout the subsystem
- Support for restricting RDMA devices to net namespaces for
containers
- Progress to remove object allocation boilerplate code from drivers
- Change in how the mlx5 driver shows representor ports linked to VFs
- mlx5 uapi feature to access the on chip SW ICM memory
- Add a new driver for 'EFA'. This is HW that supports user space
packet processing through QPs in Amazon's cloud"
* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma: (186 commits)
RDMA/ipoib: Allow user space differentiate between valid dev_port
IB/core, ipoib: Do not overreact to SM LID change event
RDMA/device: Don't fire uevent before device is fully initialized
lib/scatterlist: Remove leftover from sg_page_iter comment
RDMA/efa: Add driver to Kconfig/Makefile
RDMA/efa: Add the efa module
RDMA/efa: Add EFA verbs implementation
RDMA/efa: Add common command handlers
RDMA/efa: Implement functions that submit and complete admin commands
RDMA/efa: Add the ABI definitions
RDMA/efa: Add the com service API definitions
RDMA/efa: Add the efa_com.h file
RDMA/efa: Add the efa.h header file
RDMA/efa: Add EFA device definitions
RDMA: Add EFA related definitions
RDMA/umem: Remove hugetlb flag
RDMA/bnxt_re: Use core helpers to get aligned DMA address
RDMA/i40iw: Use core helpers to get aligned DMA address within a supported page size
RDMA/verbs: Add a DMA iterator to return aligned contiguous memory blocks
RDMA/umem: Add API to find best driver supported page size in an MR
...
Diffstat (limited to 'samples/bpf/ibumad_kern.c')
-rw-r--r-- | samples/bpf/ibumad_kern.c | 144 |
1 files changed, 144 insertions, 0 deletions
diff --git a/samples/bpf/ibumad_kern.c b/samples/bpf/ibumad_kern.c new file mode 100644 index 000000000000..38b2b3f22049 --- /dev/null +++ b/samples/bpf/ibumad_kern.c @@ -0,0 +1,144 @@ +// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB + +/** + * ibumad BPF sample kernel side + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of version 2 of the GNU General Public + * License as published by the Free Software Foundation. + * + * Copyright(c) 2018 Ira Weiny, Intel Corporation + */ + +#define KBUILD_MODNAME "ibumad_count_pkts_by_class" +#include <uapi/linux/bpf.h> + +#include "bpf_helpers.h" + + +struct bpf_map_def SEC("maps") read_count = { + .type = BPF_MAP_TYPE_ARRAY, + .key_size = sizeof(u32), /* class; u32 required */ + .value_size = sizeof(u64), /* count of mads read */ + .max_entries = 256, /* Room for all Classes */ +}; + +struct bpf_map_def SEC("maps") write_count = { + .type = BPF_MAP_TYPE_ARRAY, + .key_size = sizeof(u32), /* class; u32 required */ + .value_size = sizeof(u64), /* count of mads written */ + .max_entries = 256, /* Room for all Classes */ +}; + +#undef DEBUG +#ifdef DEBUG +#define bpf_debug(fmt, ...) \ +({ \ + char ____fmt[] = fmt; \ + bpf_trace_printk(____fmt, sizeof(____fmt), \ + ##__VA_ARGS__); \ +}) +#else +#define bpf_debug(fmt, ...) +#endif + +/* Taken from the current format defined in + * include/trace/events/ib_umad.h + * and + * /sys/kernel/debug/tracing/events/ib_umad/ib_umad_read/format + * /sys/kernel/debug/tracing/events/ib_umad/ib_umad_write/format + */ +struct ib_umad_rw_args { + u64 pad; + u8 port_num; + u8 sl; + u8 path_bits; + u8 grh_present; + u32 id; + u32 status; + u32 timeout_ms; + u32 retires; + u32 length; + u32 qpn; + u32 qkey; + u8 gid_index; + u8 hop_limit; + u16 lid; + u16 attr_id; + u16 pkey_index; + u8 base_version; + u8 mgmt_class; + u8 class_version; + u8 method; + u32 flow_label; + u16 mad_status; + u16 class_specific; + u32 attr_mod; + u64 tid; + u8 gid[16]; + u32 dev_index; + u8 traffic_class; +}; + +SEC("tracepoint/ib_umad/ib_umad_read_recv") +int on_ib_umad_read_recv(struct ib_umad_rw_args *ctx) +{ + u64 zero = 0, *val; + u8 class = ctx->mgmt_class; + + bpf_debug("ib_umad read recv : class 0x%x\n", class); + + val = bpf_map_lookup_elem(&read_count, &class); + if (!val) { + bpf_map_update_elem(&read_count, &class, &zero, BPF_NOEXIST); + val = bpf_map_lookup_elem(&read_count, &class); + if (!val) + return 0; + } + + (*val) += 1; + + return 0; +} +SEC("tracepoint/ib_umad/ib_umad_read_send") +int on_ib_umad_read_send(struct ib_umad_rw_args *ctx) +{ + u64 zero = 0, *val; + u8 class = ctx->mgmt_class; + + bpf_debug("ib_umad read send : class 0x%x\n", class); + + val = bpf_map_lookup_elem(&read_count, &class); + if (!val) { + bpf_map_update_elem(&read_count, &class, &zero, BPF_NOEXIST); + val = bpf_map_lookup_elem(&read_count, &class); + if (!val) + return 0; + } + + (*val) += 1; + + return 0; +} +SEC("tracepoint/ib_umad/ib_umad_write") +int on_ib_umad_write(struct ib_umad_rw_args *ctx) +{ + u64 zero = 0, *val; + u8 class = ctx->mgmt_class; + + bpf_debug("ib_umad write : class 0x%x\n", class); + + val = bpf_map_lookup_elem(&write_count, &class); + if (!val) { + bpf_map_update_elem(&write_count, &class, &zero, BPF_NOEXIST); + val = bpf_map_lookup_elem(&write_count, &class); + if (!val) + return 0; + } + + (*val) += 1; + + return 0; +} + +char _license[] SEC("license") = "GPL"; |