/* * Copyright (c) 2012, 2013 Intel Corporation. All rights reserved. * Copyright (c) 2006 - 2012 QLogic Corporation. All rights reserved. * Copyright (c) 2005, 2006 PathScale, Inc. All rights reserved. * * This software is available to you under a choice of one of two * licenses. You may choose to be licensed under the terms of the GNU * General Public License (GPL) Version 2, available from the file * COPYING in the main directory of this source tree, or the * OpenIB.org BSD license below: * * Redistribution and use in source and binary forms, with or * without modification, are permitted provided that the following * conditions are met: * * - Redistributions of source code must retain the above * copyright notice, this list of conditions and the following * disclaimer. * * - Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following * disclaimer in the documentation and/or other materials * provided with the distribution. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #ifndef QIB_VERBS_H #define QIB_VERBS_H #include <linux/types.h> #include <linux/spinlock.h> #include <linux/kernel.h> #include <linux/interrupt.h> #include <linux/kref.h> #include <linux/workqueue.h> #include <linux/kthread.h> #include <linux/completion.h> #include <rdma/ib_pack.h> #include <rdma/ib_user_verbs.h> #include <rdma/rdma_vt.h> struct qib_ctxtdata; struct qib_pportdata; struct qib_devdata; struct qib_verbs_txreq; #define QIB_MAX_RDMA_ATOMIC 16 #define QIB_GUIDS_PER_PORT 5 /* * Increment this value if any changes that break userspace ABI * compatibility are made. */ #define QIB_UVERBS_ABI_VERSION 2 /* * Define an ib_cq_notify value that is not valid so we know when CQ * notifications are armed. */ #define IB_CQ_NONE (IB_CQ_NEXT_COMP + 1) #define IB_SEQ_NAK (3 << 29) /* AETH NAK opcode values */ #define IB_RNR_NAK 0x20 #define IB_NAK_PSN_ERROR 0x60 #define IB_NAK_INVALID_REQUEST 0x61 #define IB_NAK_REMOTE_ACCESS_ERROR 0x62 #define IB_NAK_REMOTE_OPERATIONAL_ERROR 0x63 #define IB_NAK_INVALID_RD_REQUEST 0x64 /* Flags for checking QP state (see ib_qib_state_ops[]) */ #define QIB_POST_SEND_OK 0x01 #define QIB_POST_RECV_OK 0x02 #define QIB_PROCESS_RECV_OK 0x04 #define QIB_PROCESS_SEND_OK 0x08 #define QIB_PROCESS_NEXT_SEND_OK 0x10 #define QIB_FLUSH_SEND 0x20 #define QIB_FLUSH_RECV 0x40 #define QIB_PROCESS_OR_FLUSH_SEND \ (QIB_PROCESS_SEND_OK | QIB_FLUSH_SEND) /* IB Performance Manager status values */ #define IB_PMA_SAMPLE_STATUS_DONE 0x00 #define IB_PMA_SAMPLE_STATUS_STARTED 0x01 #define IB_PMA_SAMPLE_STATUS_RUNNING 0x02 /* Mandatory IB performance counter select values. */ #define IB_PMA_PORT_XMIT_DATA cpu_to_be16(0x0001) #define IB_PMA_PORT_RCV_DATA cpu_to_be16(0x0002) #define IB_PMA_PORT_XMIT_PKTS cpu_to_be16(0x0003) #define IB_PMA_PORT_RCV_PKTS cpu_to_be16(0x0004) #define IB_PMA_PORT_XMIT_WAIT cpu_to_be16(0x0005) #define QIB_VENDOR_IPG cpu_to_be16(0xFFA0) #define IB_BTH_REQ_ACK (1 << 31) #define IB_BTH_SOLICITED (1 << 23) #define IB_BTH_MIG_REQ (1 << 22) /* XXX Should be defined in ib_verbs.h enum ib_port_cap_flags */ #define IB_PORT_OTHER_LOCAL_CHANGES_SUP (1 << 26) #define IB_GRH_VERSION 6 #define IB_GRH_VERSION_MASK 0xF #define IB_GRH_VERSION_SHIFT 28 #define IB_GRH_TCLASS_MASK 0xFF #define IB_GRH_TCLASS_SHIFT 20 #define IB_GRH_FLOW_MASK 0xFFFFF #define IB_GRH_FLOW_SHIFT 0 #define IB_GRH_NEXT_HDR 0x1B #define IB_DEFAULT_GID_PREFIX cpu_to_be64(0xfe80000000000000ULL) /* Values for set/get portinfo VLCap OperationalVLs */ #define IB_VL_VL0 1 #define IB_VL_VL0_1 2 #define IB_VL_VL0_3 3 #define IB_VL_VL0_7 4 #define IB_VL_VL0_14 5 static inline int qib_num_vls(int vls) { switch (vls) { default: case IB_VL_VL0: return 1; case IB_VL_VL0_1: return 2; case IB_VL_VL0_3: return 4; case IB_VL_VL0_7: return 8; case IB_VL_VL0_14: return 15; } } struct ib_reth { __be64 vaddr; __be32 rkey; __be32 length; } __packed; struct ib_atomic_eth { __be32 vaddr[2]; /* unaligned so access as 2 32-bit words */ __be32 rkey; __be64 swap_data; __be64 compare_data; } __packed; struct qib_other_headers { __be32 bth[3]; union { struct { __be32 deth[2]; __be32 imm_data; } ud; struct { struct ib_reth reth; __be32 imm_data; } rc; struct { __be32 aeth; __be32 atomic_ack_eth[2]; } at; __be32 imm_data; __be32 aeth; struct ib_atomic_eth atomic_eth; } u; } __packed; /* * Note that UD packets with a GRH header are 8+40+12+8 = 68 bytes * long (72 w/ imm_data). Only the first 56 bytes of the IB header * will be in the eager header buffer. The remaining 12 or 16 bytes * are in the data buffer. */ struct qib_ib_header { __be16 lrh[4]; union { struct { struct ib_grh grh; struct qib_other_headers oth; } l; struct qib_other_headers oth; } u; } __packed; struct qib_pio_header { __le32 pbc[2]; struct qib_ib_header hdr; } __packed; /* * There is one struct qib_mcast for each multicast GID. * All attached QPs are then stored as a list of * struct qib_mcast_qp. */ struct qib_mcast_qp { struct list_head list; struct rvt_qp *qp; }; struct qib_mcast { struct rb_node rb_node; union ib_gid mgid; struct list_head qp_list; wait_queue_head_t wait; atomic_t refcount; int n_attached; }; /* * This structure is used to contain the head pointer, tail pointer, * and completion queue entries as a single memory allocation so * it can be mmap'ed into user space. */ struct qib_cq_wc { u32 head; /* index of next entry to fill */ u32 tail; /* index of next ib_poll_cq() entry */ union { /* these are actually size ibcq.cqe + 1 */ struct ib_uverbs_wc uqueue[0]; struct ib_wc kqueue[0]; }; }; /* * The completion queue structure. */ struct qib_cq { struct ib_cq ibcq; struct kthread_work comptask; struct qib_devdata *dd; spinlock_t lock; /* protect changes in this struct */ u8 notify; u8 triggered; struct qib_cq_wc *queue; struct rvt_mmap_info *ip; }; /* * qib specific data structure that will be hidden from rvt after the queue pair * is made common. */ struct qib_qp_priv { struct qib_ib_header *s_hdr; /* next packet header to send */ struct list_head iowait; /* link for wait PIO buf */ atomic_t s_dma_busy; struct qib_verbs_txreq *s_tx; struct work_struct s_work; wait_queue_head_t wait_dma; struct rvt_qp *owner; }; #define QIB_PSN_CREDIT 16 /* * Since struct rvt_swqe is not a fixed size, we can't simply index into * struct rvt_qp.s_wq. This function does the array index computation. */ static inline struct rvt_swqe *get_swqe_ptr(struct rvt_qp *qp, unsigned n) { return (struct rvt_swqe *)((char *)qp->s_wq + (sizeof(struct rvt_swqe) + qp->s_max_sge * sizeof(struct rvt_sge)) * n); } /* * Since struct rvt_rwqe is not a fixed size, we can't simply index into * struct rvt_rwq.wq. This function does the array index computation. */ static inline struct rvt_rwqe *get_rwqe_ptr(struct rvt_rq *rq, unsigned n) { return (struct rvt_rwqe *) ((char *) rq->wq->wq + (sizeof(struct rvt_rwqe) + rq->max_sge * sizeof(struct ib_sge)) * n); } struct qib_opcode_stats { u64 n_packets; /* number of packets */ u64 n_bytes; /* total number of bytes */ }; struct qib_opcode_stats_perctx { struct qib_opcode_stats stats[128]; }; struct qib_pma_counters { u64 n_unicast_xmit; /* total unicast packets sent */ u64 n_unicast_rcv; /* total unicast packets received */ u64 n_multicast_xmit; /* total multicast packets sent */ u64 n_multicast_rcv; /* total multicast packets received */ }; struct qib_ibport { struct rvt_ibport rvp; struct rvt_ah *sm_ah; struct rvt_ah *smi_ah; __be64 guids[QIB_GUIDS_PER_PORT - 1]; /* writable GUIDs */ struct qib_pma_counters __percpu *pmastats; u64 z_unicast_xmit; /* starting count for PMA */ u64 z_unicast_rcv; /* starting count for PMA */ u64 z_multicast_xmit; /* starting count for PMA */ u64 z_multicast_rcv; /* starting count for PMA */ u64 z_symbol_error_counter; /* starting count for PMA */ u64 z_link_error_recovery_counter; /* starting count for PMA */ u64 z_link_downed_counter; /* starting count for PMA */ u64 z_port_rcv_errors; /* starting count for PMA */ u64 z_port_rcv_remphys_errors; /* starting count for PMA */ u64 z_port_xmit_discards; /* starting count for PMA */ u64 z_port_xmit_data; /* starting count for PMA */ u64 z_port_rcv_data; /* starting count for PMA */ u64 z_port_xmit_packets; /* starting count for PMA */ u64 z_port_rcv_packets; /* starting count for PMA */ u32 z_local_link_integrity_errors; /* starting count for PMA */ u32 z_excessive_buffer_overrun_errors; /* starting count for PMA */ u32 z_vl15_dropped; /* starting count for PMA */ u8 sl_to_vl[16]; }; struct qib_ibdev { struct rvt_dev_info rdi; struct list_head piowait; /* list for wait PIO buf */ struct list_head dmawait; /* list for wait DMA */ struct list_head txwait; /* list for wait qib_verbs_txreq */ struct list_head memwait; /* list for wait kernel memory */ struct list_head txreq_free; struct timer_list mem_timer; struct qib_pio_header *pio_hdrs; dma_addr_t pio_hdrs_phys; u32 qp_rnd; /* random bytes for hash */ u32 n_piowait; u32 n_txwait; u32 n_cqs_allocated; /* number of CQs allocated for device */ spinlock_t n_cqs_lock; u32 n_qps_allocated; /* number of QPs allocated for device */ spinlock_t n_qps_lock; u32 n_srqs_allocated; /* number of SRQs allocated for device */ spinlock_t n_srqs_lock; u32 n_mcast_grps_allocated; /* number of mcast groups allocated */ spinlock_t n_mcast_grps_lock; #ifdef CONFIG_DEBUG_FS /* per HCA debugfs */ struct dentry *qib_ibdev_dbg; #endif }; struct qib_verbs_counters { u64 symbol_error_counter; u64 link_error_recovery_counter; u64 link_downed_counter; u64 port_rcv_errors; u64 port_rcv_remphys_errors; u64 port_xmit_discards; u64 port_xmit_data; u64 port_rcv_data; u64 port_xmit_packets; u64 port_rcv_packets; u32 local_link_integrity_errors; u32 excessive_buffer_overrun_errors; u32 vl15_dropped; }; static inline struct qib_cq *to_icq(struct ib_cq *ibcq) { return container_of(ibcq, struct qib_cq, ibcq); } static inline struct rvt_qp *to_iqp(struct ib_qp *ibqp) { return container_of(ibqp, struct rvt_qp, ibqp); } static inline struct qib_ibdev *to_idev(struct ib_device *ibdev) { struct rvt_dev_info *rdi; rdi = container_of(ibdev, struct rvt_dev_info, ibdev); return container_of(rdi, struct qib_ibdev, rdi); } /* * Send if not busy or waiting for I/O and either * a RC response is pending or we can process send work requests. */ static inline int qib_send_ok(struct rvt_qp *qp) { return !(qp->s_flags & (RVT_S_BUSY | RVT_S_ANY_WAIT_IO)) && (qp->s_hdrwords || (qp->s_flags & RVT_S_RESP_PENDING) || !(qp->s_flags & RVT_S_ANY_WAIT_SEND)); } /* * This must be called with s_lock held. */ void qib_schedule_send(struct rvt_qp *qp); static inline int qib_pkey_ok(u16 pkey1, u16 pkey2) { u16 p1 = pkey1 & 0x7FFF; u16 p2 = pkey2 & 0x7FFF; /* * Low 15 bits must be non-zero and match, and * one of the two must be a full member. */ return p1 && p1 == p2 && ((__s16)pkey1 < 0 || (__s16)pkey2 < 0); } void qib_bad_pqkey(struct qib_ibport *ibp, __be16 trap_num, u32 key, u32 sl, u32 qp1, u32 qp2, __be16 lid1, __be16 lid2); void qib_cap_mask_chg(struct qib_ibport *ibp); void qib_sys_guid_chg(struct qib_ibport *ibp); void qib_node_desc_chg(struct qib_ibport *ibp); int qib_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num, const struct ib_wc *in_wc, const struct ib_grh *in_grh, const struct ib_mad_hdr *in, size_t in_mad_size, struct ib_mad_hdr *out, size_t *out_mad_size, u16 *out_mad_pkey_index); int qib_create_agents(struct qib_ibdev *dev); void qib_free_agents(struct qib_ibdev *dev); /* * Compare the lower 24 bits of the two values. * Returns an integer <, ==, or > than zero. */ static inline int qib_cmp24(u32 a, u32 b) { return (((int) a) - ((int) b)) << 8; } struct qib_mcast *qib_mcast_find(struct qib_ibport *ibp, union ib_gid *mgid); int qib_snapshot_counters(struct qib_pportdata *ppd, u64 *swords, u64 *rwords, u64 *spkts, u64 *rpkts, u64 *xmit_wait); int qib_get_counters(struct qib_pportdata *ppd, struct qib_verbs_counters *cntrs); int qib_multicast_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid); int qib_multicast_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid); int qib_mcast_tree_empty(struct qib_ibport *ibp); __be32 qib_compute_aeth(struct rvt_qp *qp); struct rvt_qp *qib_lookup_qpn(struct qib_ibport *ibp, u32 qpn); int qib_destroy_qp(struct ib_qp *ibqp); int qib_error_qp(struct rvt_qp *qp, enum ib_wc_status err); int qib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, int attr_mask, struct ib_udata *udata); int qib_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, int attr_mask, struct ib_qp_init_attr *init_attr); /* * Functions provided by qib driver for rdmavt to use */ unsigned qib_free_all_qps(struct rvt_dev_info *rdi); void *qp_priv_alloc(struct rvt_dev_info *rdi, struct rvt_qp *qp, gfp_t gfp); void qp_priv_free(struct rvt_dev_info *rdi, struct rvt_qp *qp); void notify_qp_reset(struct rvt_qp *qp); int alloc_qpn(struct rvt_dev_info *rdi, struct rvt_qpn_table *qpt, enum ib_qp_type type, u8 port, gfp_t gfp); #ifdef CONFIG_DEBUG_FS struct qib_qp_iter; struct qib_qp_iter *qib_qp_iter_init(struct qib_ibdev *dev); int qib_qp_iter_next(struct qib_qp_iter *iter); void qib_qp_iter_print(struct seq_file *s, struct qib_qp_iter *iter); #endif void qib_get_credit(struct rvt_qp *qp, u32 aeth); unsigned qib_pkt_delay(u32 plen, u8 snd_mult, u8 rcv_mult); void qib_verbs_sdma_desc_avail(struct qib_pportdata *ppd, unsigned avail); void qib_put_txreq(struct qib_verbs_txreq *tx); int qib_verbs_send(struct rvt_qp *qp, struct qib_ib_header *hdr, u32 hdrwords, struct rvt_sge_state *ss, u32 len); void qib_copy_sge(struct rvt_sge_state *ss, void *data, u32 length, int release); void qib_skip_sge(struct rvt_sge_state *ss, u32 length, int release); void qib_uc_rcv(struct qib_ibport *ibp, struct qib_ib_header *hdr, int has_grh, void *data, u32 tlen, struct rvt_qp *qp); void qib_rc_rcv(struct qib_ctxtdata *rcd, struct qib_ib_header *hdr, int has_grh, void *data, u32 tlen, struct rvt_qp *qp); int qib_check_ah(struct ib_device *ibdev, struct ib_ah_attr *ah_attr); struct ib_ah *qib_create_qp0_ah(struct qib_ibport *ibp, u16 dlid); void qib_rc_rnr_retry(unsigned long arg); void qib_rc_send_complete(struct rvt_qp *qp, struct qib_ib_header *hdr); void qib_rc_error(struct rvt_qp *qp, enum ib_wc_status err); int qib_post_ud_send(struct rvt_qp *qp, struct ib_send_wr *wr); void qib_ud_rcv(struct qib_ibport *ibp, struct qib_ib_header *hdr, int has_grh, void *data, u32 tlen, struct rvt_qp *qp); int qib_post_srq_receive(struct ib_srq *ibsrq, struct ib_recv_wr *wr, struct ib_recv_wr **bad_wr); struct ib_srq *qib_create_srq(struct ib_pd *ibpd, struct ib_srq_init_attr *srq_init_attr, struct ib_udata *udata); int qib_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr, enum ib_srq_attr_mask attr_mask, struct ib_udata *udata); int qib_query_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr); int qib_destroy_srq(struct ib_srq *ibsrq); int qib_cq_init(struct qib_devdata *dd); void qib_cq_exit(struct qib_devdata *dd); void qib_cq_enter(struct qib_cq *cq, struct ib_wc *entry, int sig); int qib_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *entry); struct ib_cq *qib_create_cq(struct ib_device *ibdev, const struct ib_cq_init_attr *attr, struct ib_ucontext *context, struct ib_udata *udata); int qib_destroy_cq(struct ib_cq *ibcq); int qib_req_notify_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags notify_flags); int qib_resize_cq(struct ib_cq *ibcq, int cqe, struct ib_udata *udata); void mr_rcu_callback(struct rcu_head *list); static inline void qib_put_ss(struct rvt_sge_state *ss) { while (ss->num_sge) { rvt_put_mr(ss->sge.mr); if (--ss->num_sge) ss->sge = *ss->sg_list++; } } int qib_get_rwqe(struct rvt_qp *qp, int wr_id_only); void qib_migrate_qp(struct rvt_qp *qp); int qib_ruc_check_hdr(struct qib_ibport *ibp, struct qib_ib_header *hdr, int has_grh, struct rvt_qp *qp, u32 bth0); u32 qib_make_grh(struct qib_ibport *ibp, struct ib_grh *hdr, struct ib_global_route *grh, u32 hwords, u32 nwords); void qib_make_ruc_header(struct rvt_qp *qp, struct qib_other_headers *ohdr, u32 bth0, u32 bth2); void qib_do_send(struct work_struct *work); void qib_send_complete(struct rvt_qp *qp, struct rvt_swqe *wqe, enum ib_wc_status status); void qib_send_rc_ack(struct rvt_qp *qp); int qib_make_rc_req(struct rvt_qp *qp); int qib_make_uc_req(struct rvt_qp *qp); int qib_make_ud_req(struct rvt_qp *qp); int qib_register_ib_device(struct qib_devdata *); void qib_unregister_ib_device(struct qib_devdata *); void qib_ib_rcv(struct qib_ctxtdata *, void *, void *, u32); void qib_ib_piobufavail(struct qib_devdata *); unsigned qib_get_npkeys(struct qib_devdata *); unsigned qib_get_pkey(struct qib_ibport *, unsigned); extern const enum ib_wc_opcode ib_qib_wc_opcode[]; /* * Below HCA-independent IB PhysPortState values, returned * by the f_ibphys_portstate() routine. */ #define IB_PHYSPORTSTATE_SLEEP 1 #define IB_PHYSPORTSTATE_POLL 2 #define IB_PHYSPORTSTATE_DISABLED 3 #define IB_PHYSPORTSTATE_CFG_TRAIN 4 #define IB_PHYSPORTSTATE_LINKUP 5 #define IB_PHYSPORTSTATE_LINK_ERR_RECOVER 6 #define IB_PHYSPORTSTATE_CFG_DEBOUNCE 8 #define IB_PHYSPORTSTATE_CFG_IDLE 0xB #define IB_PHYSPORTSTATE_RECOVERY_RETRAIN 0xC #define IB_PHYSPORTSTATE_RECOVERY_WAITRMT 0xE #define IB_PHYSPORTSTATE_RECOVERY_IDLE 0xF #define IB_PHYSPORTSTATE_CFG_ENH 0x10 #define IB_PHYSPORTSTATE_CFG_WAIT_ENH 0x13 extern const int ib_qib_state_ops[]; extern __be64 ib_qib_sys_image_guid; /* in network order */ extern unsigned int ib_rvt_lkey_table_size; extern unsigned int ib_qib_max_cqes; extern unsigned int ib_qib_max_cqs; extern unsigned int ib_qib_max_qp_wrs; extern unsigned int ib_qib_max_qps; extern unsigned int ib_qib_max_sges; extern unsigned int ib_qib_max_mcast_grps; extern unsigned int ib_qib_max_mcast_qp_attached; extern unsigned int ib_qib_max_srqs; extern unsigned int ib_qib_max_srq_sges; extern unsigned int ib_qib_max_srq_wrs; extern const u32 ib_qib_rnr_table[]; #endif /* QIB_VERBS_H */