#ifndef DEF_RDMA_VT_H #define DEF_RDMA_VT_H /*- * SPDX-License-Identifier: BSD-2-Clause OR GPL-2.0 * * Copyright(c) 2016 Intel Corporation. * * This file is provided under a dual BSD/GPLv2 license. When using or * redistributing this file, you may do so under either license. * * GPL LICENSE SUMMARY * * 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. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * BSD LICENSE * * 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. * - Neither the name of Intel Corporation nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /* * Structure that low level drivers will populate in order to register with the * rdmavt layer. */ #include <linux/spinlock.h> #include <linux/list.h> #include <linux/hash.h> #include <rdma/ib_verbs.h> #include <rdma/rdmavt_mr.h> #include <rdma/rdmavt_qp.h> #define RVT_MAX_PKEY_VALUES 16 struct rvt_ibport { struct rvt_qp __rcu *qp[2]; struct ib_mad_agent *send_agent; /* agent for SMI (traps) */ struct rb_root mcast_tree; spinlock_t lock; /* protect changes in this struct */ /* non-zero when timer is set */ unsigned long mkey_lease_timeout; unsigned long trap_timeout; __be64 gid_prefix; /* in network order */ __be64 mkey; u64 tid; u32 port_cap_flags; u32 pma_sample_start; u32 pma_sample_interval; __be16 pma_counter_select[5]; u16 pma_tag; u16 mkey_lease_period; u16 sm_lid; u8 sm_sl; u8 mkeyprot; u8 subnet_timeout; u8 vl_high_limit; /* * Driver is expected to keep these up to date. These * counters are informational only and not required to be * completely accurate. */ u64 n_rc_resends; u64 n_seq_naks; u64 n_rdma_seq; u64 n_rnr_naks; u64 n_other_naks; u64 n_loop_pkts; u64 n_pkt_drops; u64 n_vl15_dropped; u64 n_rc_timeouts; u64 n_dmawait; u64 n_unaligned; u64 n_rc_dupreq; u64 n_rc_seqnak; u16 pkey_violations; u16 qkey_violations; u16 mkey_violations; /* Hot-path per CPU counters to avoid cacheline trading to update */ u64 z_rc_acks; u64 z_rc_qacks; u64 z_rc_delayed_comp; u64 __percpu *rc_acks; u64 __percpu *rc_qacks; u64 __percpu *rc_delayed_comp; void *priv; /* driver private data */ /* * The pkey table is allocated and maintained by the driver. Drivers * need to have access to this before registering with rdmav. However * rdmavt will need access to it so drivers need to proviee this during * the attach port API call. */ u16 *pkey_table; struct rvt_ah *sm_ah; }; #define RVT_CQN_MAX 16 /* maximum length of cq name */ /* * Things that are driver specific, module parameters in hfi1 and qib */ struct rvt_driver_params { struct ib_device_attr props; /* * Anything driver specific that is not covered by props * For instance special module parameters. Goes here. */ unsigned int lkey_table_size; unsigned int qp_table_size; int qpn_start; int qpn_inc; int qpn_res_start; int qpn_res_end; int nports; int npkeys; char cq_name[RVT_CQN_MAX]; int node; int psn_mask; int psn_shift; int psn_modify_mask; u32 core_cap_flags; u32 max_mad_size; u8 qos_shift; u8 max_rdma_atomic; u8 reserved_operations; }; /* Protection domain */ struct rvt_pd { struct ib_pd ibpd; int user; /* non-zero if created from user space */ }; /* Address handle */ struct rvt_ah { struct ib_ah ibah; struct ib_ah_attr attr; atomic_t refcount; u8 vl; u8 log_pmtu; }; struct rvt_dev_info; struct rvt_swqe; struct rvt_driver_provided { /* * Which functions are required depends on which verbs rdmavt is * providing and which verbs the driver is overriding. See * check_support() for details. */ /* Passed to ib core registration. Callback to create syfs files */ int (*port_callback)(struct ib_device *, u8, struct kobject *); /* * Returns a string to represent the device for which is being * registered. This is primarily used for error and debug messages on * the console. */ const char * (*get_card_name)(struct rvt_dev_info *rdi); /* * Returns a pointer to the undelying hardware's PCI device. This is * used to display information as to what hardware is being referenced * in an output message */ struct pci_dev * (*get_pci_dev)(struct rvt_dev_info *rdi); /* * Allocate a private queue pair data structure for driver specific * information which is opaque to rdmavt. Errors are returned via * ERR_PTR(err). The driver is free to return NULL or a valid * pointer. */ void * (*qp_priv_alloc)(struct rvt_dev_info *rdi, struct rvt_qp *qp, gfp_t gfp); /* * Free the driver's private qp structure. */ void (*qp_priv_free)(struct rvt_dev_info *rdi, struct rvt_qp *qp); /* * Inform the driver the particular qp in quesiton has been reset so * that it can clean up anything it needs to. */ void (*notify_qp_reset)(struct rvt_qp *qp); /* * Give the driver a notice that there is send work to do. It is up to * the driver to generally push the packets out, this just queues the * work with the driver. There are two variants here. The no_lock * version requires the s_lock not to be held. The other assumes the * s_lock is held. */ void (*schedule_send)(struct rvt_qp *qp); void (*schedule_send_no_lock)(struct rvt_qp *qp); /* * Sometimes rdmavt needs to kick the driver's send progress. That is * done by this call back. */ void (*do_send)(struct rvt_qp *qp); /* * Get a path mtu from the driver based on qp attributes. */ int (*get_pmtu_from_attr)(struct rvt_dev_info *rdi, struct rvt_qp *qp, struct ib_qp_attr *attr); /* * Notify driver that it needs to flush any outstanding IO requests that * are waiting on a qp. */ void (*flush_qp_waiters)(struct rvt_qp *qp); /* * Notify driver to stop its queue of sending packets. Nothing else * should be posted to the queue pair after this has been called. */ void (*stop_send_queue)(struct rvt_qp *qp); /* * Have the drivr drain any in progress operations */ void (*quiesce_qp)(struct rvt_qp *qp); /* * Inform the driver a qp has went to error state. */ void (*notify_error_qp)(struct rvt_qp *qp); /* * Get an MTU for a qp. */ u32 (*mtu_from_qp)(struct rvt_dev_info *rdi, struct rvt_qp *qp, u32 pmtu); /* * Convert an mtu to a path mtu */ int (*mtu_to_path_mtu)(u32 mtu); /* * Get the guid of a port in big endian byte order */ int (*get_guid_be)(struct rvt_dev_info *rdi, struct rvt_ibport *rvp, int guid_index, __be64 *guid); /* * Query driver for the state of the port. */ int (*query_port_state)(struct rvt_dev_info *rdi, u8 port_num, struct ib_port_attr *props); /* * Tell driver to shutdown a port */ int (*shut_down_port)(struct rvt_dev_info *rdi, u8 port_num); /* Tell driver to send a trap for changed port capabilities */ void (*cap_mask_chg)(struct rvt_dev_info *rdi, u8 port_num); /* * The following functions can be safely ignored completely. Any use of * these is checked for NULL before blindly calling. Rdmavt should also * be functional if drivers omit these. */ /* Called to inform the driver that all qps should now be freed. */ unsigned (*free_all_qps)(struct rvt_dev_info *rdi); /* Driver specific AH validation */ int (*check_ah)(struct ib_device *, struct ib_ah_attr *); /* Inform the driver a new AH has been created */ void (*notify_new_ah)(struct ib_device *, struct ib_ah_attr *, struct rvt_ah *); /* Let the driver pick the next queue pair number*/ int (*alloc_qpn)(struct rvt_dev_info *rdi, struct rvt_qpn_table *qpt, enum ib_qp_type type, u8 port_num, gfp_t gfp); /* Determine if its safe or allowed to modify the qp */ int (*check_modify_qp)(struct rvt_qp *qp, struct ib_qp_attr *attr, int attr_mask, struct ib_udata *udata); /* Driver specific QP modification/notification-of */ void (*modify_qp)(struct rvt_qp *qp, struct ib_qp_attr *attr, int attr_mask, struct ib_udata *udata); /* Driver specific work request checking */ int (*check_send_wqe)(struct rvt_qp *qp, struct rvt_swqe *wqe); /* Notify driver a mad agent has been created */ void (*notify_create_mad_agent)(struct rvt_dev_info *rdi, int port_idx); /* Notify driver a mad agent has been removed */ void (*notify_free_mad_agent)(struct rvt_dev_info *rdi, int port_idx); }; struct rvt_dev_info { struct ib_device ibdev; /* Keep this first. Nothing above here */ /* * Prior to calling for registration the driver will be responsible for * allocating space for this structure. * * The driver will also be responsible for filling in certain members of * dparms.props. The driver needs to fill in dparms exactly as it would * want values reported to a ULP. This will be returned to the caller * in rdmavt's device. The driver should also therefore refrain from * modifying this directly after registration with rdmavt. */ /* Driver specific properties */ struct rvt_driver_params dparms; /* post send table */ const struct rvt_operation_params *post_parms; struct rvt_mregion __rcu *dma_mr; struct rvt_lkey_table lkey_table; /* Driver specific helper functions */ struct rvt_driver_provided driver_f; /* Internal use */ int n_pds_allocated; spinlock_t n_pds_lock; /* Protect pd allocated count */ int n_ahs_allocated; spinlock_t n_ahs_lock; /* Protect ah allocated count */ u32 n_srqs_allocated; spinlock_t n_srqs_lock; /* Protect srqs allocated count */ int flags; struct rvt_ibport **ports; /* QP */ struct rvt_qp_ibdev *qp_dev; u32 n_qps_allocated; /* number of QPs allocated for device */ u32 n_rc_qps; /* number of RC QPs allocated for device */ u32 busy_jiffies; /* timeout scaling based on RC QP count */ spinlock_t n_qps_lock; /* protect qps, rc qps and busy jiffy counts */ /* memory maps */ struct list_head pending_mmaps; spinlock_t mmap_offset_lock; /* protect mmap_offset */ u32 mmap_offset; spinlock_t pending_lock; /* protect pending mmap list */ /* CQ */ struct kthread_worker *worker; /* per device cq worker */ u32 n_cqs_allocated; /* number of CQs allocated for device */ spinlock_t n_cqs_lock; /* protect count of in use cqs */ /* Multicast */ u32 n_mcast_grps_allocated; /* number of mcast groups allocated */ spinlock_t n_mcast_grps_lock; }; static inline struct rvt_pd *ibpd_to_rvtpd(struct ib_pd *ibpd) { return container_of(ibpd, struct rvt_pd, ibpd); } static inline struct rvt_ah *ibah_to_rvtah(struct ib_ah *ibah) { return container_of(ibah, struct rvt_ah, ibah); } static inline struct rvt_dev_info *ib_to_rvt(struct ib_device *ibdev) { return container_of(ibdev, struct rvt_dev_info, ibdev); } static inline struct rvt_srq *ibsrq_to_rvtsrq(struct ib_srq *ibsrq) { return container_of(ibsrq, struct rvt_srq, ibsrq); } static inline struct rvt_qp *ibqp_to_rvtqp(struct ib_qp *ibqp) { return container_of(ibqp, struct rvt_qp, ibqp); } static inline unsigned rvt_get_npkeys(struct rvt_dev_info *rdi) { /* * All ports have same number of pkeys. */ return rdi->dparms.npkeys; } /* * Return the max atomic suitable for determining * the size of the ack ring buffer in a QP. */ static inline unsigned int rvt_max_atomic(struct rvt_dev_info *rdi) { return rdi->dparms.max_rdma_atomic + 1; } /* * Return the indexed PKEY from the port PKEY table. */ static inline u16 rvt_get_pkey(struct rvt_dev_info *rdi, int port_index, unsigned index) { if (index >= rvt_get_npkeys(rdi)) return 0; else return rdi->ports[port_index]->pkey_table[index]; } /** * rvt_lookup_qpn - return the QP with the given QPN * @ibp: the ibport * @qpn: the QP number to look up * * The caller must hold the rcu_read_lock(), and keep the lock until * the returned qp is no longer in use. */ /* TODO: Remove this and put in rdmavt/qp.h when no longer needed by drivers */ static inline struct rvt_qp *rvt_lookup_qpn(struct rvt_dev_info *rdi, struct rvt_ibport *rvp, u32 qpn) __must_hold(RCU) { struct rvt_qp *qp = NULL; if (unlikely(qpn <= 1)) { qp = rcu_dereference(rvp->qp[qpn]); } else { u32 n = hash_32(qpn, rdi->qp_dev->qp_table_bits); for (qp = rcu_dereference(rdi->qp_dev->qp_table[n]); qp; qp = rcu_dereference(qp->next)) if (qp->ibqp.qp_num == qpn) break; } return qp; } struct rvt_dev_info *rvt_alloc_device(size_t size, int nports); void rvt_dealloc_device(struct rvt_dev_info *rdi); int rvt_register_device(struct rvt_dev_info *rvd); void rvt_unregister_device(struct rvt_dev_info *rvd); int rvt_check_ah(struct ib_device *ibdev, struct ib_ah_attr *ah_attr); int rvt_init_port(struct rvt_dev_info *rdi, struct rvt_ibport *port, int port_index, u16 *pkey_table); int rvt_fast_reg_mr(struct rvt_qp *qp, struct ib_mr *ibmr, u32 key, int access); int rvt_invalidate_rkey(struct rvt_qp *qp, u32 rkey); int rvt_rkey_ok(struct rvt_qp *qp, struct rvt_sge *sge, u32 len, u64 vaddr, u32 rkey, int acc); int rvt_lkey_ok(struct rvt_lkey_table *rkt, struct rvt_pd *pd, struct rvt_sge *isge, struct ib_sge *sge, int acc); struct rvt_mcast *rvt_mcast_find(struct rvt_ibport *ibp, union ib_gid *mgid); #endif /* DEF_RDMA_VT_H */
