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532 lines
14 KiB
532 lines
14 KiB
/* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */ |
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/* |
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* Copyright(c) 2016 - 2019 Intel Corporation. |
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*/ |
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|
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#ifndef DEF_RDMA_VT_H |
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#define DEF_RDMA_VT_H |
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|
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/* |
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* Structure that low level drivers will populate in order to register with the |
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* rdmavt layer. |
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*/ |
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#include <linux/spinlock.h> |
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#include <linux/list.h> |
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#include <linux/hash.h> |
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#include <rdma/ib_verbs.h> |
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#include <rdma/ib_mad.h> |
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#include <rdma/rdmavt_mr.h> |
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#define RVT_MAX_PKEY_VALUES 16 |
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#define RVT_MAX_TRAP_LEN 100 /* Limit pending trap list */ |
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#define RVT_MAX_TRAP_LISTS 5 /*((IB_NOTICE_TYPE_INFO & 0x0F) + 1)*/ |
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#define RVT_TRAP_TIMEOUT 4096 /* 4.096 usec */ |
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struct trap_list { |
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u32 list_len; |
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struct list_head list; |
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}; |
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struct rvt_qp; |
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struct rvt_qpn_table; |
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struct rvt_ibport { |
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struct rvt_qp __rcu *qp[2]; |
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struct ib_mad_agent *send_agent; /* agent for SMI (traps) */ |
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struct rb_root mcast_tree; |
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spinlock_t lock; /* protect changes in this struct */ |
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/* non-zero when timer is set */ |
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unsigned long mkey_lease_timeout; |
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unsigned long trap_timeout; |
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__be64 gid_prefix; /* in network order */ |
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__be64 mkey; |
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u64 tid; |
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u32 port_cap_flags; |
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u16 port_cap3_flags; |
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u32 pma_sample_start; |
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u32 pma_sample_interval; |
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__be16 pma_counter_select[5]; |
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u16 pma_tag; |
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u16 mkey_lease_period; |
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u32 sm_lid; |
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u8 sm_sl; |
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u8 mkeyprot; |
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u8 subnet_timeout; |
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u8 vl_high_limit; |
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/* |
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* Driver is expected to keep these up to date. These |
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* counters are informational only and not required to be |
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* completely accurate. |
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*/ |
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u64 n_rc_resends; |
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u64 n_seq_naks; |
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u64 n_rdma_seq; |
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u64 n_rnr_naks; |
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u64 n_other_naks; |
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u64 n_loop_pkts; |
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u64 n_pkt_drops; |
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u64 n_vl15_dropped; |
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u64 n_rc_timeouts; |
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u64 n_dmawait; |
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u64 n_unaligned; |
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u64 n_rc_dupreq; |
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u64 n_rc_seqnak; |
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u64 n_rc_crwaits; |
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u16 pkey_violations; |
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u16 qkey_violations; |
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u16 mkey_violations; |
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/* Hot-path per CPU counters to avoid cacheline trading to update */ |
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u64 z_rc_acks; |
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u64 z_rc_qacks; |
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u64 z_rc_delayed_comp; |
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u64 __percpu *rc_acks; |
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u64 __percpu *rc_qacks; |
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u64 __percpu *rc_delayed_comp; |
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void *priv; /* driver private data */ |
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/* |
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* The pkey table is allocated and maintained by the driver. Drivers |
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* need to have access to this before registering with rdmav. However |
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* rdmavt will need access to it so drivers need to proviee this during |
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* the attach port API call. |
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*/ |
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u16 *pkey_table; |
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struct rvt_ah *sm_ah; |
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/* |
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* Keep a list of traps that have not been repressed. They will be |
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* resent based on trap_timer. |
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*/ |
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struct trap_list trap_lists[RVT_MAX_TRAP_LISTS]; |
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struct timer_list trap_timer; |
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}; |
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#define RVT_CQN_MAX 16 /* maximum length of cq name */ |
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#define RVT_SGE_COPY_MEMCPY 0 |
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#define RVT_SGE_COPY_CACHELESS 1 |
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#define RVT_SGE_COPY_ADAPTIVE 2 |
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/* |
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* Things that are driver specific, module parameters in hfi1 and qib |
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*/ |
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struct rvt_driver_params { |
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struct ib_device_attr props; |
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/* |
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* Anything driver specific that is not covered by props |
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* For instance special module parameters. Goes here. |
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*/ |
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unsigned int lkey_table_size; |
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unsigned int qp_table_size; |
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unsigned int sge_copy_mode; |
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unsigned int wss_threshold; |
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unsigned int wss_clean_period; |
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int qpn_start; |
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int qpn_inc; |
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int qpn_res_start; |
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int qpn_res_end; |
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int nports; |
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int npkeys; |
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int node; |
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int psn_mask; |
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int psn_shift; |
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int psn_modify_mask; |
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u32 core_cap_flags; |
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u32 max_mad_size; |
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u8 qos_shift; |
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u8 max_rdma_atomic; |
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u8 extra_rdma_atomic; |
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u8 reserved_operations; |
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}; |
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/* User context */ |
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struct rvt_ucontext { |
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struct ib_ucontext ibucontext; |
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}; |
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/* Protection domain */ |
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struct rvt_pd { |
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struct ib_pd ibpd; |
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bool user; |
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}; |
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/* Address handle */ |
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struct rvt_ah { |
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struct ib_ah ibah; |
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struct rdma_ah_attr attr; |
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u8 vl; |
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u8 log_pmtu; |
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}; |
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/* |
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* This structure is used by rvt_mmap() to validate an offset |
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* when an mmap() request is made. The vm_area_struct then uses |
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* this as its vm_private_data. |
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*/ |
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struct rvt_mmap_info { |
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struct list_head pending_mmaps; |
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struct ib_ucontext *context; |
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void *obj; |
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__u64 offset; |
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struct kref ref; |
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u32 size; |
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}; |
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/* memory working set size */ |
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struct rvt_wss { |
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unsigned long *entries; |
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atomic_t total_count; |
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atomic_t clean_counter; |
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atomic_t clean_entry; |
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int threshold; |
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int num_entries; |
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long pages_mask; |
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unsigned int clean_period; |
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}; |
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struct rvt_dev_info; |
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struct rvt_swqe; |
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struct rvt_driver_provided { |
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/* |
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* Which functions are required depends on which verbs rdmavt is |
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* providing and which verbs the driver is overriding. See |
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* check_support() for details. |
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*/ |
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/* hot path calldowns in a single cacheline */ |
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/* |
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* Give the driver a notice that there is send work to do. It is up to |
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* the driver to generally push the packets out, this just queues the |
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* work with the driver. There are two variants here. The no_lock |
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* version requires the s_lock not to be held. The other assumes the |
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* s_lock is held. |
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*/ |
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bool (*schedule_send)(struct rvt_qp *qp); |
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bool (*schedule_send_no_lock)(struct rvt_qp *qp); |
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/* |
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* Driver specific work request setup and checking. |
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* This function is allowed to perform any setup, checks, or |
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* adjustments required to the SWQE in order to be usable by |
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* underlying protocols. This includes private data structure |
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* allocations. |
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*/ |
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int (*setup_wqe)(struct rvt_qp *qp, struct rvt_swqe *wqe, |
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bool *call_send); |
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/* |
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* Sometimes rdmavt needs to kick the driver's send progress. That is |
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* done by this call back. |
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*/ |
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void (*do_send)(struct rvt_qp *qp); |
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/* |
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* Returns a pointer to the undelying hardware's PCI device. This is |
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* used to display information as to what hardware is being referenced |
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* in an output message |
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*/ |
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struct pci_dev * (*get_pci_dev)(struct rvt_dev_info *rdi); |
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/* |
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* Allocate a private queue pair data structure for driver specific |
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* information which is opaque to rdmavt. Errors are returned via |
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* ERR_PTR(err). The driver is free to return NULL or a valid |
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* pointer. |
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*/ |
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void * (*qp_priv_alloc)(struct rvt_dev_info *rdi, struct rvt_qp *qp); |
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/* |
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* Init a struture allocated with qp_priv_alloc(). This should be |
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* called after all qp fields have been initialized in rdmavt. |
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*/ |
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int (*qp_priv_init)(struct rvt_dev_info *rdi, struct rvt_qp *qp, |
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struct ib_qp_init_attr *init_attr); |
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/* |
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* Free the driver's private qp structure. |
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*/ |
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void (*qp_priv_free)(struct rvt_dev_info *rdi, struct rvt_qp *qp); |
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/* |
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* Inform the driver the particular qp in quesiton has been reset so |
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* that it can clean up anything it needs to. |
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*/ |
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void (*notify_qp_reset)(struct rvt_qp *qp); |
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/* |
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* Get a path mtu from the driver based on qp attributes. |
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*/ |
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int (*get_pmtu_from_attr)(struct rvt_dev_info *rdi, struct rvt_qp *qp, |
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struct ib_qp_attr *attr); |
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/* |
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* Notify driver that it needs to flush any outstanding IO requests that |
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* are waiting on a qp. |
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*/ |
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void (*flush_qp_waiters)(struct rvt_qp *qp); |
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/* |
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* Notify driver to stop its queue of sending packets. Nothing else |
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* should be posted to the queue pair after this has been called. |
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*/ |
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void (*stop_send_queue)(struct rvt_qp *qp); |
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/* |
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* Have the drivr drain any in progress operations |
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*/ |
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void (*quiesce_qp)(struct rvt_qp *qp); |
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/* |
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* Inform the driver a qp has went to error state. |
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*/ |
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void (*notify_error_qp)(struct rvt_qp *qp); |
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/* |
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* Get an MTU for a qp. |
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*/ |
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u32 (*mtu_from_qp)(struct rvt_dev_info *rdi, struct rvt_qp *qp, |
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u32 pmtu); |
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/* |
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* Convert an mtu to a path mtu |
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*/ |
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int (*mtu_to_path_mtu)(u32 mtu); |
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/* |
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* Get the guid of a port in big endian byte order |
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*/ |
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int (*get_guid_be)(struct rvt_dev_info *rdi, struct rvt_ibport *rvp, |
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int guid_index, __be64 *guid); |
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/* |
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* Query driver for the state of the port. |
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*/ |
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int (*query_port_state)(struct rvt_dev_info *rdi, u8 port_num, |
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struct ib_port_attr *props); |
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/* |
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* Tell driver to shutdown a port |
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*/ |
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int (*shut_down_port)(struct rvt_dev_info *rdi, u8 port_num); |
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/* Tell driver to send a trap for changed port capabilities */ |
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void (*cap_mask_chg)(struct rvt_dev_info *rdi, u8 port_num); |
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/* |
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* The following functions can be safely ignored completely. Any use of |
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* these is checked for NULL before blindly calling. Rdmavt should also |
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* be functional if drivers omit these. |
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*/ |
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/* Called to inform the driver that all qps should now be freed. */ |
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unsigned (*free_all_qps)(struct rvt_dev_info *rdi); |
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/* Driver specific AH validation */ |
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int (*check_ah)(struct ib_device *, struct rdma_ah_attr *); |
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/* Inform the driver a new AH has been created */ |
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void (*notify_new_ah)(struct ib_device *, struct rdma_ah_attr *, |
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struct rvt_ah *); |
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/* Let the driver pick the next queue pair number*/ |
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int (*alloc_qpn)(struct rvt_dev_info *rdi, struct rvt_qpn_table *qpt, |
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enum ib_qp_type type, u8 port_num); |
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/* Determine if its safe or allowed to modify the qp */ |
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int (*check_modify_qp)(struct rvt_qp *qp, struct ib_qp_attr *attr, |
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int attr_mask, struct ib_udata *udata); |
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/* Driver specific QP modification/notification-of */ |
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void (*modify_qp)(struct rvt_qp *qp, struct ib_qp_attr *attr, |
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int attr_mask, struct ib_udata *udata); |
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/* Notify driver a mad agent has been created */ |
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void (*notify_create_mad_agent)(struct rvt_dev_info *rdi, int port_idx); |
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/* Notify driver a mad agent has been removed */ |
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void (*notify_free_mad_agent)(struct rvt_dev_info *rdi, int port_idx); |
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/* Notify driver to restart rc */ |
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void (*notify_restart_rc)(struct rvt_qp *qp, u32 psn, int wait); |
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/* Get and return CPU to pin CQ processing thread */ |
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int (*comp_vect_cpu_lookup)(struct rvt_dev_info *rdi, int comp_vect); |
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}; |
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struct rvt_dev_info { |
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struct ib_device ibdev; /* Keep this first. Nothing above here */ |
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/* |
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* Prior to calling for registration the driver will be responsible for |
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* allocating space for this structure. |
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* |
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* The driver will also be responsible for filling in certain members of |
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* dparms.props. The driver needs to fill in dparms exactly as it would |
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* want values reported to a ULP. This will be returned to the caller |
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* in rdmavt's device. The driver should also therefore refrain from |
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* modifying this directly after registration with rdmavt. |
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*/ |
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/* Driver specific properties */ |
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struct rvt_driver_params dparms; |
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/* post send table */ |
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const struct rvt_operation_params *post_parms; |
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/* opcode translation table */ |
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const enum ib_wc_opcode *wc_opcode; |
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/* Driver specific helper functions */ |
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struct rvt_driver_provided driver_f; |
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struct rvt_mregion __rcu *dma_mr; |
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struct rvt_lkey_table lkey_table; |
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/* Internal use */ |
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int n_pds_allocated; |
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spinlock_t n_pds_lock; /* Protect pd allocated count */ |
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int n_ahs_allocated; |
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spinlock_t n_ahs_lock; /* Protect ah allocated count */ |
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u32 n_srqs_allocated; |
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spinlock_t n_srqs_lock; /* Protect srqs allocated count */ |
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int flags; |
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struct rvt_ibport **ports; |
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/* QP */ |
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struct rvt_qp_ibdev *qp_dev; |
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u32 n_qps_allocated; /* number of QPs allocated for device */ |
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u32 n_rc_qps; /* number of RC QPs allocated for device */ |
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u32 busy_jiffies; /* timeout scaling based on RC QP count */ |
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spinlock_t n_qps_lock; /* protect qps, rc qps and busy jiffy counts */ |
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/* memory maps */ |
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struct list_head pending_mmaps; |
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spinlock_t mmap_offset_lock; /* protect mmap_offset */ |
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u32 mmap_offset; |
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spinlock_t pending_lock; /* protect pending mmap list */ |
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/* CQ */ |
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u32 n_cqs_allocated; /* number of CQs allocated for device */ |
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spinlock_t n_cqs_lock; /* protect count of in use cqs */ |
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/* Multicast */ |
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u32 n_mcast_grps_allocated; /* number of mcast groups allocated */ |
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spinlock_t n_mcast_grps_lock; |
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/* Memory Working Set Size */ |
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struct rvt_wss *wss; |
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}; |
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/** |
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* rvt_set_ibdev_name - Craft an IB device name from client info |
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* @rdi: pointer to the client rvt_dev_info structure |
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* @name: client specific name |
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* @unit: client specific unit number. |
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*/ |
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static inline void rvt_set_ibdev_name(struct rvt_dev_info *rdi, |
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const char *fmt, const char *name, |
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const int unit) |
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{ |
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/* |
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* FIXME: rvt and its users want to touch the ibdev before |
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* registration and have things like the name work. We don't have the |
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* infrastructure in the core to support this directly today, hack it |
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* to work by setting the name manually here. |
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*/ |
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dev_set_name(&rdi->ibdev.dev, fmt, name, unit); |
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strlcpy(rdi->ibdev.name, dev_name(&rdi->ibdev.dev), IB_DEVICE_NAME_MAX); |
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} |
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/** |
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* rvt_get_ibdev_name - return the IB name |
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* @rdi: rdmavt device |
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* |
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* Return the registered name of the device. |
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*/ |
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static inline const char *rvt_get_ibdev_name(const struct rvt_dev_info *rdi) |
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{ |
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return dev_name(&rdi->ibdev.dev); |
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} |
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static inline struct rvt_pd *ibpd_to_rvtpd(struct ib_pd *ibpd) |
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{ |
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return container_of(ibpd, struct rvt_pd, ibpd); |
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} |
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static inline struct rvt_ah *ibah_to_rvtah(struct ib_ah *ibah) |
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{ |
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return container_of(ibah, struct rvt_ah, ibah); |
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} |
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static inline struct rvt_dev_info *ib_to_rvt(struct ib_device *ibdev) |
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{ |
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return container_of(ibdev, struct rvt_dev_info, ibdev); |
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} |
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static inline unsigned rvt_get_npkeys(struct rvt_dev_info *rdi) |
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{ |
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/* |
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* All ports have same number of pkeys. |
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*/ |
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return rdi->dparms.npkeys; |
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} |
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/* |
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* Return the max atomic suitable for determining |
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* the size of the ack ring buffer in a QP. |
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*/ |
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static inline unsigned int rvt_max_atomic(struct rvt_dev_info *rdi) |
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{ |
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return rdi->dparms.max_rdma_atomic + |
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rdi->dparms.extra_rdma_atomic + 1; |
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} |
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static inline unsigned int rvt_size_atomic(struct rvt_dev_info *rdi) |
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{ |
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return rdi->dparms.max_rdma_atomic + |
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rdi->dparms.extra_rdma_atomic; |
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} |
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/* |
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* Return the indexed PKEY from the port PKEY table. |
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*/ |
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static inline u16 rvt_get_pkey(struct rvt_dev_info *rdi, |
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int port_index, |
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unsigned index) |
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{ |
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if (index >= rvt_get_npkeys(rdi)) |
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return 0; |
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else |
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return rdi->ports[port_index]->pkey_table[index]; |
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} |
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struct rvt_dev_info *rvt_alloc_device(size_t size, int nports); |
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void rvt_dealloc_device(struct rvt_dev_info *rdi); |
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int rvt_register_device(struct rvt_dev_info *rvd); |
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void rvt_unregister_device(struct rvt_dev_info *rvd); |
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int rvt_check_ah(struct ib_device *ibdev, struct rdma_ah_attr *ah_attr); |
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int rvt_init_port(struct rvt_dev_info *rdi, struct rvt_ibport *port, |
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int port_index, u16 *pkey_table); |
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int rvt_fast_reg_mr(struct rvt_qp *qp, struct ib_mr *ibmr, u32 key, |
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int access); |
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int rvt_invalidate_rkey(struct rvt_qp *qp, u32 rkey); |
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int rvt_rkey_ok(struct rvt_qp *qp, struct rvt_sge *sge, |
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u32 len, u64 vaddr, u32 rkey, int acc); |
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int rvt_lkey_ok(struct rvt_lkey_table *rkt, struct rvt_pd *pd, |
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struct rvt_sge *isge, struct rvt_sge *last_sge, |
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struct ib_sge *sge, int acc); |
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struct rvt_mcast *rvt_mcast_find(struct rvt_ibport *ibp, union ib_gid *mgid, |
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u16 lid); |
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#endif /* DEF_RDMA_VT_H */
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