1fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover#ifndef _RDS_IW_H 2fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover#define _RDS_IW_H 3fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover 4a6b7a407865aab9f849dd99a71072b7cd1175116Alexey Dobriyan#include <linux/interrupt.h> 5fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover#include <rdma/ib_verbs.h> 6fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover#include <rdma/rdma_cm.h> 7fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover#include "rds.h" 8fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover#include "rdma_transport.h" 9fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover 10fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover#define RDS_FASTREG_SIZE 20 11fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover#define RDS_FASTREG_POOL_SIZE 2048 12fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover 13fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover#define RDS_IW_MAX_SGE 8 14fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover#define RDS_IW_RECV_SGE 2 15fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover 16fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover#define RDS_IW_DEFAULT_RECV_WR 1024 17fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover#define RDS_IW_DEFAULT_SEND_WR 256 18fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover 19fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover#define RDS_IW_SUPPORTED_PROTOCOLS 0x00000003 /* minor versions supported */ 20fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover 21fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Groverextern struct list_head rds_iw_devices; 22fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover 23fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover/* 24fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover * IB posts RDS_FRAG_SIZE fragments of pages to the receive queues to 25fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover * try and minimize the amount of memory tied up both the device and 26fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover * socket receive queues. 27fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover */ 28fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover/* page offset of the final full frag that fits in the page */ 29fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover#define RDS_PAGE_LAST_OFF (((PAGE_SIZE / RDS_FRAG_SIZE) - 1) * RDS_FRAG_SIZE) 30fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Groverstruct rds_page_frag { 31fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover struct list_head f_item; 32fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover struct page *f_page; 33fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover unsigned long f_offset; 34fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover dma_addr_t f_mapped; 35fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover}; 36fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover 37fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Groverstruct rds_iw_incoming { 38fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover struct list_head ii_frags; 39fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover struct rds_incoming ii_inc; 40fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover}; 41fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover 42fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Groverstruct rds_iw_connect_private { 43fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover /* Add new fields at the end, and don't permute existing fields. */ 44fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover __be32 dp_saddr; 45fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover __be32 dp_daddr; 46fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover u8 dp_protocol_major; 47fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover u8 dp_protocol_minor; 48fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover __be16 dp_protocol_minor_mask; /* bitmask */ 49fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover __be32 dp_reserved1; 50fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover __be64 dp_ack_seq; 51fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover __be32 dp_credit; /* non-zero enables flow ctl */ 52fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover}; 53fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover 54fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Groverstruct rds_iw_scatterlist { 55fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover struct scatterlist *list; 56fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover unsigned int len; 57fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover int dma_len; 58fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover unsigned int dma_npages; 59fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover unsigned int bytes; 60fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover}; 61fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover 62fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Groverstruct rds_iw_mapping { 63fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover spinlock_t m_lock; /* protect the mapping struct */ 64fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover struct list_head m_list; 65fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover struct rds_iw_mr *m_mr; 66fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover uint32_t m_rkey; 67fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover struct rds_iw_scatterlist m_sg; 68fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover}; 69fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover 70fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Groverstruct rds_iw_send_work { 71fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover struct rds_message *s_rm; 72fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover 73fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover /* We should really put these into a union: */ 74f8b3aaf2ba8ca9e27b47f8bfdff07c8b968f2c05Andy Grover struct rm_rdma_op *s_op; 75fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover struct rds_iw_mapping *s_mapping; 76fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover struct ib_mr *s_mr; 77fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover struct ib_fast_reg_page_list *s_page_list; 78fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover unsigned char s_remap_count; 79fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover 80fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover struct ib_send_wr s_wr; 81fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover struct ib_sge s_sge[RDS_IW_MAX_SGE]; 82fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover unsigned long s_queued; 83fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover}; 84fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover 85fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Groverstruct rds_iw_recv_work { 86fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover struct rds_iw_incoming *r_iwinc; 87fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover struct rds_page_frag *r_frag; 88fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover struct ib_recv_wr r_wr; 89fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover struct ib_sge r_sge[2]; 90fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover}; 91fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover 92fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Groverstruct rds_iw_work_ring { 93fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover u32 w_nr; 94fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover u32 w_alloc_ptr; 95fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover u32 w_alloc_ctr; 96fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover u32 w_free_ptr; 97fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover atomic_t w_free_ctr; 98fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover}; 99fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover 100fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Groverstruct rds_iw_device; 101fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover 102fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Groverstruct rds_iw_connection { 103fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover 104fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover struct list_head iw_node; 105fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover struct rds_iw_device *rds_iwdev; 106fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover struct rds_connection *conn; 107fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover 108fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover /* alphabet soup, IBTA style */ 109fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover struct rdma_cm_id *i_cm_id; 110fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover struct ib_pd *i_pd; 111fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover struct ib_mr *i_mr; 112fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover struct ib_cq *i_send_cq; 113fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover struct ib_cq *i_recv_cq; 114fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover 115fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover /* tx */ 116fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover struct rds_iw_work_ring i_send_ring; 117fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover struct rds_message *i_rm; 118fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover struct rds_header *i_send_hdrs; 119fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover u64 i_send_hdrs_dma; 120fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover struct rds_iw_send_work *i_sends; 121fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover 122fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover /* rx */ 123d521b63b27e3a397e0ef7ca86b6e813861083c83Andy Grover struct tasklet_struct i_recv_tasklet; 124fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover struct mutex i_recv_mutex; 125fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover struct rds_iw_work_ring i_recv_ring; 126fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover struct rds_iw_incoming *i_iwinc; 127fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover u32 i_recv_data_rem; 128fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover struct rds_header *i_recv_hdrs; 129fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover u64 i_recv_hdrs_dma; 130fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover struct rds_iw_recv_work *i_recvs; 131fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover struct rds_page_frag i_frag; 132fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover u64 i_ack_recv; /* last ACK received */ 133fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover 134fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover /* sending acks */ 135fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover unsigned long i_ack_flags; 1368cbd9606a6367c221a7bbcc47f3ab1a8c31b6437Andy Grover#ifdef KERNEL_HAS_ATOMIC64 1378cbd9606a6367c221a7bbcc47f3ab1a8c31b6437Andy Grover atomic64_t i_ack_next; /* next ACK to send */ 1388cbd9606a6367c221a7bbcc47f3ab1a8c31b6437Andy Grover#else 1398cbd9606a6367c221a7bbcc47f3ab1a8c31b6437Andy Grover spinlock_t i_ack_lock; /* protect i_ack_next */ 140fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover u64 i_ack_next; /* next ACK to send */ 1418cbd9606a6367c221a7bbcc47f3ab1a8c31b6437Andy Grover#endif 142fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover struct rds_header *i_ack; 143fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover struct ib_send_wr i_ack_wr; 144fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover struct ib_sge i_ack_sge; 145fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover u64 i_ack_dma; 146fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover unsigned long i_ack_queued; 147fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover 148fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover /* Flow control related information 149fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover * 150fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover * Our algorithm uses a pair variables that we need to access 151fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover * atomically - one for the send credits, and one posted 152fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover * recv credits we need to transfer to remote. 153fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover * Rather than protect them using a slow spinlock, we put both into 154fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover * a single atomic_t and update it using cmpxchg 155fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover */ 156fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover atomic_t i_credits; 157fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover 158fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover /* Protocol version specific information */ 159fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover unsigned int i_flowctl:1; /* enable/disable flow ctl */ 160fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover unsigned int i_dma_local_lkey:1; 161fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover unsigned int i_fastreg_posted:1; /* fastreg posted on this connection */ 162fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover /* Batched completions */ 163fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover unsigned int i_unsignaled_wrs; 164fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover long i_unsignaled_bytes; 165fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover}; 166fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover 167fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover/* This assumes that atomic_t is at least 32 bits */ 168fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover#define IB_GET_SEND_CREDITS(v) ((v) & 0xffff) 169fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover#define IB_GET_POST_CREDITS(v) ((v) >> 16) 170fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover#define IB_SET_SEND_CREDITS(v) ((v) & 0xffff) 171fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover#define IB_SET_POST_CREDITS(v) ((v) << 16) 172fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover 173fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Groverstruct rds_iw_cm_id { 174fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover struct list_head list; 175fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover struct rdma_cm_id *cm_id; 176fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover}; 177fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover 178fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Groverstruct rds_iw_device { 179fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover struct list_head list; 180fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover struct list_head cm_id_list; 181fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover struct list_head conn_list; 182fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover struct ib_device *dev; 183fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover struct ib_pd *pd; 184fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover struct ib_mr *mr; 185fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover struct rds_iw_mr_pool *mr_pool; 186fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover int max_sge; 187fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover unsigned int max_wrs; 188fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover unsigned int dma_local_lkey:1; 189fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover spinlock_t spinlock; /* protect the above */ 190fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover}; 191fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover 192fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover/* bits for i_ack_flags */ 193fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover#define IB_ACK_IN_FLIGHT 0 194fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover#define IB_ACK_REQUESTED 1 195fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover 196fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover/* Magic WR_ID for ACKs */ 197fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover#define RDS_IW_ACK_WR_ID ((u64)0xffffffffffffffffULL) 198fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover#define RDS_IW_FAST_REG_WR_ID ((u64)0xefefefefefefefefULL) 199fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover#define RDS_IW_LOCAL_INV_WR_ID ((u64)0xdfdfdfdfdfdfdfdfULL) 200fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover 201fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Groverstruct rds_iw_statistics { 202fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover uint64_t s_iw_connect_raced; 203fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover uint64_t s_iw_listen_closed_stale; 204fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover uint64_t s_iw_tx_cq_call; 205fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover uint64_t s_iw_tx_cq_event; 206fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover uint64_t s_iw_tx_ring_full; 207fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover uint64_t s_iw_tx_throttle; 208fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover uint64_t s_iw_tx_sg_mapping_failure; 209fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover uint64_t s_iw_tx_stalled; 210fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover uint64_t s_iw_tx_credit_updates; 211fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover uint64_t s_iw_rx_cq_call; 212fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover uint64_t s_iw_rx_cq_event; 213fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover uint64_t s_iw_rx_ring_empty; 214fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover uint64_t s_iw_rx_refill_from_cq; 215fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover uint64_t s_iw_rx_refill_from_thread; 216fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover uint64_t s_iw_rx_alloc_limit; 217fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover uint64_t s_iw_rx_credit_updates; 218fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover uint64_t s_iw_ack_sent; 219fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover uint64_t s_iw_ack_send_failure; 220fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover uint64_t s_iw_ack_send_delayed; 221fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover uint64_t s_iw_ack_send_piggybacked; 222fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover uint64_t s_iw_ack_received; 223fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover uint64_t s_iw_rdma_mr_alloc; 224fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover uint64_t s_iw_rdma_mr_free; 225fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover uint64_t s_iw_rdma_mr_used; 226fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover uint64_t s_iw_rdma_mr_pool_flush; 227fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover uint64_t s_iw_rdma_mr_pool_wait; 228fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover uint64_t s_iw_rdma_mr_pool_depleted; 229fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover}; 230fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover 231fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Groverextern struct workqueue_struct *rds_iw_wq; 232fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover 233fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover/* 234fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover * Fake ib_dma_sync_sg_for_{cpu,device} as long as ib_verbs.h 235fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover * doesn't define it. 236fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover */ 237fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Groverstatic inline void rds_iw_dma_sync_sg_for_cpu(struct ib_device *dev, 238fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover struct scatterlist *sg, unsigned int sg_dma_len, int direction) 239fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover{ 240fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover unsigned int i; 241fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover 242fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover for (i = 0; i < sg_dma_len; ++i) { 243fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover ib_dma_sync_single_for_cpu(dev, 244fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover ib_sg_dma_address(dev, &sg[i]), 245fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover ib_sg_dma_len(dev, &sg[i]), 246fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover direction); 247fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover } 248fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover} 249fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover#define ib_dma_sync_sg_for_cpu rds_iw_dma_sync_sg_for_cpu 250fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover 251fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Groverstatic inline void rds_iw_dma_sync_sg_for_device(struct ib_device *dev, 252fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover struct scatterlist *sg, unsigned int sg_dma_len, int direction) 253fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover{ 254fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover unsigned int i; 255fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover 256fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover for (i = 0; i < sg_dma_len; ++i) { 257fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover ib_dma_sync_single_for_device(dev, 258fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover ib_sg_dma_address(dev, &sg[i]), 259fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover ib_sg_dma_len(dev, &sg[i]), 260fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover direction); 261fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover } 262fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover} 263fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover#define ib_dma_sync_sg_for_device rds_iw_dma_sync_sg_for_device 264fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover 265fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Groverstatic inline u32 rds_iw_local_dma_lkey(struct rds_iw_connection *ic) 266fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover{ 267fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover return ic->i_dma_local_lkey ? ic->i_cm_id->device->local_dma_lkey : ic->i_mr->lkey; 268fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover} 269fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover 270fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover/* ib.c */ 271fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Groverextern struct rds_transport rds_iw_transport; 272fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Groverextern struct ib_client rds_iw_client; 273fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover 274fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Groverextern unsigned int fastreg_pool_size; 275fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Groverextern unsigned int fastreg_message_size; 276fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover 277fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Groverextern spinlock_t iw_nodev_conns_lock; 278fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Groverextern struct list_head iw_nodev_conns; 279fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover 280fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover/* ib_cm.c */ 281fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Groverint rds_iw_conn_alloc(struct rds_connection *conn, gfp_t gfp); 282fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grovervoid rds_iw_conn_free(void *arg); 283fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Groverint rds_iw_conn_connect(struct rds_connection *conn); 284fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grovervoid rds_iw_conn_shutdown(struct rds_connection *conn); 285fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grovervoid rds_iw_state_change(struct sock *sk); 286ef87b7ea39a91906218a262686bcb8bad8b6b46eZach Brownint rds_iw_listen_init(void); 287fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grovervoid rds_iw_listen_stop(void); 288fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grovervoid __rds_iw_conn_error(struct rds_connection *conn, const char *, ...); 289fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Groverint rds_iw_cm_handle_connect(struct rdma_cm_id *cm_id, 290fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover struct rdma_cm_event *event); 291fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Groverint rds_iw_cm_initiate_connect(struct rdma_cm_id *cm_id); 292fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grovervoid rds_iw_cm_connect_complete(struct rds_connection *conn, 293fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover struct rdma_cm_event *event); 294fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover 295fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover 296fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover#define rds_iw_conn_error(conn, fmt...) \ 297fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover __rds_iw_conn_error(conn, KERN_WARNING "RDS/IW: " fmt) 298fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover 299fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover/* ib_rdma.c */ 300fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Groverint rds_iw_update_cm_id(struct rds_iw_device *rds_iwdev, struct rdma_cm_id *cm_id); 301745cbccac3fe8cead529a1b3358e1e86a1505bfaAndy Grovervoid rds_iw_add_conn(struct rds_iw_device *rds_iwdev, struct rds_connection *conn); 302745cbccac3fe8cead529a1b3358e1e86a1505bfaAndy Grovervoid rds_iw_remove_conn(struct rds_iw_device *rds_iwdev, struct rds_connection *conn); 303745cbccac3fe8cead529a1b3358e1e86a1505bfaAndy Grovervoid __rds_iw_destroy_conns(struct list_head *list, spinlock_t *list_lock); 304745cbccac3fe8cead529a1b3358e1e86a1505bfaAndy Groverstatic inline void rds_iw_destroy_nodev_conns(void) 305745cbccac3fe8cead529a1b3358e1e86a1505bfaAndy Grover{ 306745cbccac3fe8cead529a1b3358e1e86a1505bfaAndy Grover __rds_iw_destroy_conns(&iw_nodev_conns, &iw_nodev_conns_lock); 307745cbccac3fe8cead529a1b3358e1e86a1505bfaAndy Grover} 308745cbccac3fe8cead529a1b3358e1e86a1505bfaAndy Groverstatic inline void rds_iw_destroy_conns(struct rds_iw_device *rds_iwdev) 309745cbccac3fe8cead529a1b3358e1e86a1505bfaAndy Grover{ 310745cbccac3fe8cead529a1b3358e1e86a1505bfaAndy Grover __rds_iw_destroy_conns(&rds_iwdev->conn_list, &rds_iwdev->spinlock); 311745cbccac3fe8cead529a1b3358e1e86a1505bfaAndy Grover} 312fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Groverstruct rds_iw_mr_pool *rds_iw_create_mr_pool(struct rds_iw_device *); 313fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grovervoid rds_iw_get_mr_info(struct rds_iw_device *rds_iwdev, struct rds_info_rdma_connection *iinfo); 314fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grovervoid rds_iw_destroy_mr_pool(struct rds_iw_mr_pool *); 315fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grovervoid *rds_iw_get_mr(struct scatterlist *sg, unsigned long nents, 316fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover struct rds_sock *rs, u32 *key_ret); 317fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grovervoid rds_iw_sync_mr(void *trans_private, int dir); 318fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grovervoid rds_iw_free_mr(void *trans_private, int invalidate); 319fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grovervoid rds_iw_flush_mrs(void); 320fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover 321fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover/* ib_recv.c */ 322ef87b7ea39a91906218a262686bcb8bad8b6b46eZach Brownint rds_iw_recv_init(void); 323fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grovervoid rds_iw_recv_exit(void); 324fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Groverint rds_iw_recv(struct rds_connection *conn); 325fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Groverint rds_iw_recv_refill(struct rds_connection *conn, gfp_t kptr_gfp, 326fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover gfp_t page_gfp, int prefill); 327fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grovervoid rds_iw_inc_free(struct rds_incoming *inc); 328fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Groverint rds_iw_inc_copy_to_user(struct rds_incoming *inc, struct iovec *iov, 329fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover size_t size); 330fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grovervoid rds_iw_recv_cq_comp_handler(struct ib_cq *cq, void *context); 331d521b63b27e3a397e0ef7ca86b6e813861083c83Andy Grovervoid rds_iw_recv_tasklet_fn(unsigned long data); 332fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grovervoid rds_iw_recv_init_ring(struct rds_iw_connection *ic); 333fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grovervoid rds_iw_recv_clear_ring(struct rds_iw_connection *ic); 334fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grovervoid rds_iw_recv_init_ack(struct rds_iw_connection *ic); 335fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grovervoid rds_iw_attempt_ack(struct rds_iw_connection *ic); 336fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grovervoid rds_iw_ack_send_complete(struct rds_iw_connection *ic); 337fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Groveru64 rds_iw_piggyb_ack(struct rds_iw_connection *ic); 338fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover 339fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover/* ib_ring.c */ 340fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grovervoid rds_iw_ring_init(struct rds_iw_work_ring *ring, u32 nr); 341fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grovervoid rds_iw_ring_resize(struct rds_iw_work_ring *ring, u32 nr); 342fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Groveru32 rds_iw_ring_alloc(struct rds_iw_work_ring *ring, u32 val, u32 *pos); 343fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grovervoid rds_iw_ring_free(struct rds_iw_work_ring *ring, u32 val); 344fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grovervoid rds_iw_ring_unalloc(struct rds_iw_work_ring *ring, u32 val); 345fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Groverint rds_iw_ring_empty(struct rds_iw_work_ring *ring); 346fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Groverint rds_iw_ring_low(struct rds_iw_work_ring *ring); 347fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Groveru32 rds_iw_ring_oldest(struct rds_iw_work_ring *ring); 348fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Groveru32 rds_iw_ring_completed(struct rds_iw_work_ring *ring, u32 wr_id, u32 oldest); 349fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Groverextern wait_queue_head_t rds_iw_ring_empty_wait; 350fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover 351fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover/* ib_send.c */ 352fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grovervoid rds_iw_xmit_complete(struct rds_connection *conn); 353fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Groverint rds_iw_xmit(struct rds_connection *conn, struct rds_message *rm, 354fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover unsigned int hdr_off, unsigned int sg, unsigned int off); 355fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grovervoid rds_iw_send_cq_comp_handler(struct ib_cq *cq, void *context); 356fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grovervoid rds_iw_send_init_ring(struct rds_iw_connection *ic); 357fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grovervoid rds_iw_send_clear_ring(struct rds_iw_connection *ic); 358f8b3aaf2ba8ca9e27b47f8bfdff07c8b968f2c05Andy Groverint rds_iw_xmit_rdma(struct rds_connection *conn, struct rm_rdma_op *op); 359fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grovervoid rds_iw_send_add_credits(struct rds_connection *conn, unsigned int credits); 360fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grovervoid rds_iw_advertise_credits(struct rds_connection *conn, unsigned int posted); 361fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Groverint rds_iw_send_grab_credits(struct rds_iw_connection *ic, u32 wanted, 3627b70d0336da777c00395cc7a503497c2cdabd1a8Steve Wise u32 *adv_credits, int need_posted, int max_posted); 363fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover 364fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover/* ib_stats.c */ 365fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy GroverDECLARE_PER_CPU(struct rds_iw_statistics, rds_iw_stats); 366fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover#define rds_iw_stats_inc(member) rds_stats_inc_which(rds_iw_stats, member) 367fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Groverunsigned int rds_iw_stats_info_copy(struct rds_info_iterator *iter, 368fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover unsigned int avail); 369fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover 370fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover/* ib_sysctl.c */ 371ef87b7ea39a91906218a262686bcb8bad8b6b46eZach Brownint rds_iw_sysctl_init(void); 372fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grovervoid rds_iw_sysctl_exit(void); 373fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Groverextern unsigned long rds_iw_sysctl_max_send_wr; 374fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Groverextern unsigned long rds_iw_sysctl_max_recv_wr; 375fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Groverextern unsigned long rds_iw_sysctl_max_unsig_wrs; 376fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Groverextern unsigned long rds_iw_sysctl_max_unsig_bytes; 377fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Groverextern unsigned long rds_iw_sysctl_max_recv_allocation; 378fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Groverextern unsigned int rds_iw_sysctl_flow_control; 379fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover 380fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover/* 381fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover * Helper functions for getting/setting the header and data SGEs in 382fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover * RDS packets (not RDMA) 383fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover */ 384fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Groverstatic inline struct ib_sge * 385fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Groverrds_iw_header_sge(struct rds_iw_connection *ic, struct ib_sge *sge) 386fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover{ 387fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover return &sge[0]; 388fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover} 389fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover 390fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Groverstatic inline struct ib_sge * 391fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Groverrds_iw_data_sge(struct rds_iw_connection *ic, struct ib_sge *sge) 392fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover{ 393fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover return &sge[1]; 394fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover} 395fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover 396fcd8b7c0ecf792dd824b2edcd63cb2c08563c340Andy Grover#endif 397