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+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+/*
+ * Ceph - scalable distributed file system
+ *
+ * Copyright (C) 2016 XSKY <haomai@xsky.com>
+ *
+ * Author: Haomai Wang <haomaiwang@gmail.com>
+ *
+ * This is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2.1, as published by the Free Software
+ * Foundation. See file COPYING.
+ *
+ */
+
+#ifndef CEPH_INFINIBAND_H
+#define CEPH_INFINIBAND_H
+
+#include <boost/pool/pool.hpp>
+// need this because boost messes with ceph log/assert definitions
+#include "include/ceph_assert.h"
+
+#include <infiniband/verbs.h>
+#include <rdma/rdma_cma.h>
+
+#include <atomic>
+#include <string>
+#include <vector>
+
+#include "include/int_types.h"
+#include "include/page.h"
+#include "common/debug.h"
+#include "common/errno.h"
+#include "common/Mutex.h"
+#include "common/perf_counters.h"
+#include "msg/msg_types.h"
+#include "msg/async/net_handler.h"
+
+#define HUGE_PAGE_SIZE (2 * 1024 * 1024)
+#define ALIGN_TO_PAGE_SIZE(x) \
+ (((x) + HUGE_PAGE_SIZE -1) / HUGE_PAGE_SIZE * HUGE_PAGE_SIZE)
+
+struct IBSYNMsg {
+ uint16_t lid;
+ uint32_t qpn;
+ uint32_t psn;
+ uint32_t peer_qpn;
+ union ibv_gid gid;
+} __attribute__((packed));
+
+class RDMAStack;
+class CephContext;
+
+class Port {
+ struct ibv_context* ctxt;
+ int port_num;
+ struct ibv_port_attr* port_attr;
+ uint16_t lid;
+ int gid_idx = 0;
+ union ibv_gid gid;
+
+ public:
+ explicit Port(CephContext *cct, struct ibv_context* ictxt, uint8_t ipn);
+ uint16_t get_lid() { return lid; }
+ ibv_gid get_gid() { return gid; }
+ int get_port_num() { return port_num; }
+ ibv_port_attr* get_port_attr() { return port_attr; }
+ int get_gid_idx() { return gid_idx; }
+};
+
+
+class Device {
+ ibv_device *device;
+ const char* name;
+ uint8_t port_cnt = 0;
+ public:
+ explicit Device(CephContext *c, ibv_device* d, struct ibv_context *dc);
+ ~Device() {
+ if (active_port) {
+ delete active_port;
+ ceph_assert(ibv_close_device(ctxt) == 0);
+ }
+ }
+ const char* get_name() { return name;}
+ uint16_t get_lid() { return active_port->get_lid(); }
+ ibv_gid get_gid() { return active_port->get_gid(); }
+ int get_gid_idx() { return active_port->get_gid_idx(); }
+ void binding_port(CephContext *c, int port_num);
+ struct ibv_context *ctxt;
+ ibv_device_attr *device_attr;
+ Port* active_port;
+};
+
+
+class DeviceList {
+ struct ibv_device ** device_list;
+ struct ibv_context ** device_context_list;
+ int num;
+ Device** devices;
+ public:
+ explicit DeviceList(CephContext *cct): device_list(ibv_get_device_list(&num)),
+ device_context_list(rdma_get_devices(&num)) {
+ if (device_list == NULL || num == 0) {
+ lderr(cct) << __func__ << " failed to get rdma device list. " << cpp_strerror(errno) << dendl;
+ ceph_abort();
+ }
+ devices = new Device*[num];
+
+ for (int i = 0;i < num; ++i) {
+ devices[i] = new Device(cct, device_list[i], device_context_list[i]);
+ }
+ }
+ ~DeviceList() {
+ for (int i=0; i < num; ++i) {
+ delete devices[i];
+ }
+ delete []devices;
+ ibv_free_device_list(device_list);
+ }
+
+ Device* get_device(const char* device_name) {
+ ceph_assert(devices);
+ for (int i = 0; i < num; ++i) {
+ if (!strlen(device_name) || !strcmp(device_name, devices[i]->get_name())) {
+ return devices[i];
+ }
+ }
+ return NULL;
+ }
+};
+
+// stat counters
+enum {
+ l_msgr_rdma_dispatcher_first = 94000,
+
+ l_msgr_rdma_polling,
+ l_msgr_rdma_inflight_tx_chunks,
+ l_msgr_rdma_rx_bufs_in_use,
+ l_msgr_rdma_rx_bufs_total,
+
+ l_msgr_rdma_tx_total_wc,
+ l_msgr_rdma_tx_total_wc_errors,
+ l_msgr_rdma_tx_wc_retry_errors,
+ l_msgr_rdma_tx_wc_wr_flush_errors,
+
+ l_msgr_rdma_rx_total_wc,
+ l_msgr_rdma_rx_total_wc_errors,
+ l_msgr_rdma_rx_fin,
+
+ l_msgr_rdma_handshake_errors,
+
+ l_msgr_rdma_total_async_events,
+ l_msgr_rdma_async_last_wqe_events,
+
+ l_msgr_rdma_created_queue_pair,
+ l_msgr_rdma_active_queue_pair,
+
+ l_msgr_rdma_dispatcher_last,
+};
+
+enum {
+ l_msgr_rdma_first = 95000,
+
+ l_msgr_rdma_tx_no_mem,
+ l_msgr_rdma_tx_parital_mem,
+ l_msgr_rdma_tx_failed,
+
+ l_msgr_rdma_tx_chunks,
+ l_msgr_rdma_tx_bytes,
+ l_msgr_rdma_rx_chunks,
+ l_msgr_rdma_rx_bytes,
+ l_msgr_rdma_pending_sent_conns,
+
+ l_msgr_rdma_last,
+};
+
+class RDMADispatcher;
+
+class Infiniband {
+ public:
+ class ProtectionDomain {
+ public:
+ explicit ProtectionDomain(CephContext *cct, Device *device);
+ ~ProtectionDomain();
+
+ ibv_pd* const pd;
+ };
+
+
+ class MemoryManager {
+ public:
+ class Chunk {
+ public:
+ Chunk(ibv_mr* m, uint32_t len, char* b);
+ ~Chunk();
+
+ void set_offset(uint32_t o);
+ uint32_t get_offset();
+ void set_bound(uint32_t b);
+ void prepare_read(uint32_t b);
+ uint32_t get_bound();
+ uint32_t read(char* buf, uint32_t len);
+ uint32_t write(char* buf, uint32_t len);
+ bool full();
+ bool over();
+ void clear();
+
+ public:
+ ibv_mr* mr;
+ uint32_t lkey = 0;
+ uint32_t bytes;
+ uint32_t bound = 0;
+ uint32_t offset;
+ char* buffer; // TODO: remove buffer/refactor TX
+ char data[0];
+ };
+
+ class Cluster {
+ public:
+ Cluster(MemoryManager& m, uint32_t s);
+ ~Cluster();
+
+ int fill(uint32_t num);
+ void take_back(std::vector<Chunk*> &ck);
+ int get_buffers(std::vector<Chunk*> &chunks, size_t bytes);
+ Chunk *get_chunk_by_buffer(const char *c) {
+ uint32_t idx = (c - base) / buffer_size;
+ Chunk *chunk = chunk_base + idx;
+ return chunk;
+ }
+ bool is_my_buffer(const char *c) const {
+ return c >= base && c < end;
+ }
+
+ MemoryManager& manager;
+ uint32_t buffer_size;
+ uint32_t num_chunk = 0;
+ Mutex lock;
+ std::vector<Chunk*> free_chunks;
+ char *base = nullptr;
+ char *end = nullptr;
+ Chunk* chunk_base = nullptr;
+ };
+
+ class MemPoolContext {
+ PerfCounters *perf_logger;
+
+ public:
+ MemoryManager *manager;
+ unsigned n_bufs_allocated;
+ // true if it is possible to alloc
+ // more memory for the pool
+ explicit MemPoolContext(MemoryManager *m) :
+ perf_logger(nullptr),
+ manager(m),
+ n_bufs_allocated(0) {}
+ bool can_alloc(unsigned nbufs);
+ void update_stats(int val);
+ void set_stat_logger(PerfCounters *logger);
+ };
+
+ class PoolAllocator {
+ struct mem_info {
+ ibv_mr *mr;
+ MemPoolContext *ctx;
+ unsigned nbufs;
+ Chunk chunks[0];
+ };
+ public:
+ typedef std::size_t size_type;
+ typedef std::ptrdiff_t difference_type;
+
+ static char * malloc(const size_type bytes);
+ static void free(char * const block);
+
+ static MemPoolContext *g_ctx;
+ static Mutex lock;
+ };
+
+ /**
+ * modify boost pool so that it is possible to
+ * have a thread safe 'context' when allocating/freeing
+ * the memory. It is needed to allow a different pool
+ * configurations and bookkeeping per CephContext and
+ * also to be able to use same allocator to deal with
+ * RX and TX pool.
+ * TODO: use boost pool to allocate TX chunks too
+ */
+ class mem_pool : public boost::pool<PoolAllocator> {
+ private:
+ MemPoolContext *ctx;
+ void *slow_malloc();
+
+ public:
+ explicit mem_pool(MemPoolContext *ctx, const size_type nrequested_size,
+ const size_type nnext_size = 32,
+ const size_type nmax_size = 0) :
+ pool(nrequested_size, nnext_size, nmax_size),
+ ctx(ctx) { }
+
+ void *malloc() {
+ if (!store().empty())
+ return (store().malloc)();
+ // need to alloc more memory...
+ // slow path code
+ return slow_malloc();
+ }
+ };
+
+ MemoryManager(CephContext *c, Device *d, ProtectionDomain *p);
+ ~MemoryManager();
+
+ void* malloc(size_t size);
+ void free(void *ptr);
+
+ void create_tx_pool(uint32_t size, uint32_t tx_num);
+ void return_tx(std::vector<Chunk*> &chunks);
+ int get_send_buffers(std::vector<Chunk*> &c, size_t bytes);
+ bool is_tx_buffer(const char* c) { return send->is_my_buffer(c); }
+ Chunk *get_tx_chunk_by_buffer(const char *c) {
+ return send->get_chunk_by_buffer(c);
+ }
+ uint32_t get_tx_buffer_size() const {
+ return send->buffer_size;
+ }
+
+ Chunk *get_rx_buffer() {
+ return reinterpret_cast<Chunk *>(rxbuf_pool.malloc());
+ }
+
+ void release_rx_buffer(Chunk *chunk) {
+ rxbuf_pool.free(chunk);
+ }
+
+ void set_rx_stat_logger(PerfCounters *logger) {
+ rxbuf_pool_ctx.set_stat_logger(logger);
+ }
+
+ CephContext *cct;
+ private:
+ // TODO: Cluster -> TxPool txbuf_pool
+ // chunk layout fix
+ //
+ Cluster* send = nullptr;// SEND
+ Device *device;
+ ProtectionDomain *pd;
+ MemPoolContext rxbuf_pool_ctx;
+ mem_pool rxbuf_pool;
+
+
+ void* huge_pages_malloc(size_t size);
+ void huge_pages_free(void *ptr);
+ };
+
+ private:
+ uint32_t tx_queue_len = 0;
+ uint32_t rx_queue_len = 0;
+ uint32_t max_sge = 0;
+ uint8_t ib_physical_port = 0;
+ MemoryManager* memory_manager = nullptr;
+ ibv_srq* srq = nullptr; // shared receive work queue
+ Device *device = NULL;
+ ProtectionDomain *pd = NULL;
+ DeviceList *device_list = nullptr;
+ void wire_gid_to_gid(const char *wgid, union ibv_gid *gid);
+ void gid_to_wire_gid(const union ibv_gid *gid, char wgid[]);
+ CephContext *cct;
+ Mutex lock;
+ bool initialized = false;
+ const std::string &device_name;
+ uint8_t port_num;
+ bool support_srq = false;
+
+ public:
+ explicit Infiniband(CephContext *c);
+ ~Infiniband();
+ void init();
+ static void verify_prereq(CephContext *cct);
+
+ class CompletionChannel {
+ static const uint32_t MAX_ACK_EVENT = 5000;
+ CephContext *cct;
+ Infiniband& infiniband;
+ ibv_comp_channel *channel;
+ ibv_cq *cq;
+ uint32_t cq_events_that_need_ack;
+
+ public:
+ CompletionChannel(CephContext *c, Infiniband &ib);
+ ~CompletionChannel();
+ int init();
+ bool get_cq_event();
+ int get_fd() { return channel->fd; }
+ ibv_comp_channel* get_channel() { return channel; }
+ void bind_cq(ibv_cq *c) { cq = c; }
+ void ack_events();
+ };
+
+ // this class encapsulates the creation, use, and destruction of an RC
+ // completion queue.
+ //
+ // You need to call init and it will create a cq and associate to comp channel
+ class CompletionQueue {
+ public:
+ CompletionQueue(CephContext *c, Infiniband &ib,
+ const uint32_t qd, CompletionChannel *cc)
+ : cct(c), infiniband(ib), channel(cc), cq(NULL), queue_depth(qd) {}
+ ~CompletionQueue();
+ int init();
+ int poll_cq(int num_entries, ibv_wc *ret_wc_array);
+
+ ibv_cq* get_cq() const { return cq; }
+ int rearm_notify(bool solicited_only=true);
+ CompletionChannel* get_cc() const { return channel; }
+ private:
+ CephContext *cct;
+ Infiniband& infiniband; // Infiniband to which this QP belongs
+ CompletionChannel *channel;
+ ibv_cq *cq;
+ uint32_t queue_depth;
+ };
+
+ // this class encapsulates the creation, use, and destruction of an RC
+ // queue pair.
+ //
+ // you need call init and it will create a qp and bring it to the INIT state.
+ // after obtaining the lid, qpn, and psn of a remote queue pair, one
+ // must call plumb() to bring the queue pair to the RTS state.
+ class QueuePair {
+ public:
+ QueuePair(CephContext *c, Infiniband& infiniband, ibv_qp_type type,
+ int ib_physical_port, ibv_srq *srq,
+ Infiniband::CompletionQueue* txcq,
+ Infiniband::CompletionQueue* rxcq,
+ uint32_t tx_queue_len, uint32_t max_recv_wr, struct rdma_cm_id *cid, uint32_t q_key = 0);
+ ~QueuePair();
+
+ int init();
+
+ /**
+ * Get the initial packet sequence number for this QueuePair.
+ * This is randomly generated on creation. It should not be confused
+ * with the remote side's PSN, which is set in #plumb().
+ */
+ uint32_t get_initial_psn() const { return initial_psn; };
+ /**
+ * Get the local queue pair number for this QueuePair.
+ * QPNs are analogous to UDP/TCP port numbers.
+ */
+ uint32_t get_local_qp_number() const { return qp->qp_num; };
+ /**
+ * Get the remote queue pair number for this QueuePair, as set in #plumb().
+ * QPNs are analogous to UDP/TCP port numbers.
+ */
+ int get_remote_qp_number(uint32_t *rqp) const;
+ /**
+ * Get the remote infiniband address for this QueuePair, as set in #plumb().
+ * LIDs are "local IDs" in infiniband terminology. They are short, locally
+ * routable addresses.
+ */
+ int get_remote_lid(uint16_t *lid) const;
+ /**
+ * Get the state of a QueuePair.
+ */
+ int get_state() const;
+ /**
+ * Return true if the queue pair is in an error state, false otherwise.
+ */
+ bool is_error() const;
+ void add_tx_wr(uint32_t amt) { tx_wr_inflight += amt; }
+ void dec_tx_wr(uint32_t amt) { tx_wr_inflight -= amt; }
+ uint32_t get_tx_wr() const { return tx_wr_inflight; }
+ ibv_qp* get_qp() const { return qp; }
+ Infiniband::CompletionQueue* get_tx_cq() const { return txcq; }
+ Infiniband::CompletionQueue* get_rx_cq() const { return rxcq; }
+ int to_dead();
+ bool is_dead() const { return dead; }
+
+ private:
+ CephContext *cct;
+ Infiniband& infiniband; // Infiniband to which this QP belongs
+ ibv_qp_type type; // QP type (IBV_QPT_RC, etc.)
+ ibv_context* ctxt; // device context of the HCA to use
+ int ib_physical_port;
+ ibv_pd* pd; // protection domain
+ ibv_srq* srq; // shared receive queue
+ ibv_qp* qp; // infiniband verbs QP handle
+ struct rdma_cm_id *cm_id;
+ Infiniband::CompletionQueue* txcq;
+ Infiniband::CompletionQueue* rxcq;
+ uint32_t initial_psn; // initial packet sequence number
+ uint32_t max_send_wr;
+ uint32_t max_recv_wr;
+ uint32_t q_key;
+ bool dead;
+ std::atomic<uint32_t> tx_wr_inflight = {0}; // counter for inflight Tx WQEs
+ };
+
+ public:
+ typedef MemoryManager::Cluster Cluster;
+ typedef MemoryManager::Chunk Chunk;
+ QueuePair* create_queue_pair(CephContext *c, CompletionQueue*, CompletionQueue*,
+ ibv_qp_type type, struct rdma_cm_id *cm_id);
+ ibv_srq* create_shared_receive_queue(uint32_t max_wr, uint32_t max_sge);
+ // post rx buffers to srq, return number of buffers actually posted
+ int post_chunks_to_rq(int num, ibv_qp *qp=NULL);
+ void post_chunk_to_pool(Chunk* chunk) {
+ get_memory_manager()->release_rx_buffer(chunk);
+ }
+ int get_tx_buffers(std::vector<Chunk*> &c, size_t bytes);
+ CompletionChannel *create_comp_channel(CephContext *c);
+ CompletionQueue *create_comp_queue(CephContext *c, CompletionChannel *cc=NULL);
+ uint8_t get_ib_physical_port() { return ib_physical_port; }
+ int send_msg(CephContext *cct, int sd, IBSYNMsg& msg);
+ int recv_msg(CephContext *cct, int sd, IBSYNMsg& msg);
+ uint16_t get_lid() { return device->get_lid(); }
+ ibv_gid get_gid() { return device->get_gid(); }
+ MemoryManager* get_memory_manager() { return memory_manager; }
+ Device* get_device() { return device; }
+ int get_async_fd() { return device->ctxt->async_fd; }
+ bool is_tx_buffer(const char* c) { return memory_manager->is_tx_buffer(c);}
+ Chunk *get_tx_chunk_by_buffer(const char *c) { return memory_manager->get_tx_chunk_by_buffer(c); }
+ static const char* wc_status_to_string(int status);
+ static const char* qp_state_string(int status);
+ uint32_t get_rx_queue_len() const { return rx_queue_len; }
+};
+
+#endif
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