5 * Copyright(c) 2016 Intel Corporation.
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12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of version 2 of the GNU General Public License as
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16 * This program is distributed in the hope that it will be useful, but
17 * WITHOUT ANY WARRANTY; without even the implied warranty of
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19 * General Public License for more details.
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24 * modification, are permitted provided that the following conditions
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52 * Structure that low level drivers will populate in order to register with the
56 #include <linux/spinlock.h>
57 #include <linux/list.h>
58 #include <linux/hash.h>
59 #include <rdma/ib_verbs.h>
60 #include <rdma/rdmavt_mr.h>
61 #include <rdma/rdmavt_qp.h>
64 * For some of the IBTA objects there will likely be some
65 * initializations required. We need flags to determine whether it is OK
66 * for rdmavt to do this or not. This does not imply any functions of a
67 * partiuclar IBTA object are overridden.
69 #define RVT_FLAG_MR_INIT_DRIVER BIT(1)
70 #define RVT_FLAG_QP_INIT_DRIVER BIT(2)
71 #define RVT_FLAG_CQ_INIT_DRIVER BIT(3)
73 #define RVT_MAX_PKEY_VALUES 16
76 struct rvt_qp __rcu *qp[2];
77 struct ib_mad_agent *send_agent; /* agent for SMI (traps) */
78 struct rb_root mcast_tree;
79 spinlock_t lock; /* protect changes in this struct */
81 /* non-zero when timer is set */
82 unsigned long mkey_lease_timeout;
83 unsigned long trap_timeout;
84 __be64 gid_prefix; /* in network order */
89 u32 pma_sample_interval;
90 __be16 pma_counter_select[5];
92 u16 mkey_lease_period;
100 * Driver is expected to keep these up to date. These
101 * counters are informational only and not required to be
102 * completely accurate.
121 /* Hot-path per CPU counters to avoid cacheline trading to update */
124 u64 z_rc_delayed_comp;
125 u64 __percpu *rc_acks;
126 u64 __percpu *rc_qacks;
127 u64 __percpu *rc_delayed_comp;
129 void *priv; /* driver private data */
132 * The pkey table is allocated and maintained by the driver. Drivers
133 * need to have access to this before registering with rdmav. However
134 * rdmavt will need access to it so drivers need to proviee this during
135 * the attach port API call.
139 struct rvt_ah *sm_ah;
140 struct rvt_ah *smi_ah;
143 #define RVT_CQN_MAX 16 /* maximum length of cq name */
146 * Things that are driver specific, module parameters in hfi1 and qib
148 struct rvt_driver_params {
150 * driver required fields:
155 * driver optional fields (rvt will provide generic value if blank):
158 * rvt fields, driver value ignored:
164 struct ib_device_attr props;
167 * Drivers will need to support a number of notifications to rvt in
168 * accordance with certain events. This structure should contain a mask
169 * of the supported events. Such events that the rvt may need to know
178 * There may also be other events that the rvt layers needs to know
179 * about this is not an exhaustive list. Some events though rvt does not
180 * need to rely on the driver for such as completion queue error.
182 int rvt_signal_supported;
185 * Anything driver specific that is not covered by props
186 * For instance special module parameters. Goes here.
188 unsigned int lkey_table_size;
189 unsigned int qp_table_size;
197 char cq_name[RVT_CQN_MAX];
207 /* Protection domain */
210 int user; /* non-zero if created from user space */
216 struct ib_ah_attr attr;
223 struct rvt_driver_provided {
225 * The work to create port files in /sys/class Infiniband is different
226 * depending on the driver. This should not be extracted away and
227 * instead drivers are responsible for setting the correct callback for
231 /* -------------------*/
232 /* Required functions */
233 /* -------------------*/
234 int (*port_callback)(struct ib_device *, u8, struct kobject *);
235 const char * (*get_card_name)(struct rvt_dev_info *rdi);
236 struct pci_dev * (*get_pci_dev)(struct rvt_dev_info *rdi);
237 unsigned (*free_all_qps)(struct rvt_dev_info *rdi);
238 void * (*qp_priv_alloc)(struct rvt_dev_info *rdi, struct rvt_qp *qp,
240 void (*qp_priv_free)(struct rvt_dev_info *rdi, struct rvt_qp *qp);
241 void (*notify_qp_reset)(struct rvt_qp *qp);
242 void (*schedule_send)(struct rvt_qp *qp);
243 void (*do_send)(struct rvt_qp *qp);
244 int (*get_pmtu_from_attr)(struct rvt_dev_info *rdi, struct rvt_qp *qp,
245 struct ib_qp_attr *attr);
246 void (*flush_qp_waiters)(struct rvt_qp *qp);
247 void (*stop_send_queue)(struct rvt_qp *qp);
248 void (*quiesce_qp)(struct rvt_qp *qp);
249 void (*notify_error_qp)(struct rvt_qp *qp);
250 u32 (*mtu_from_qp)(struct rvt_dev_info *rdi, struct rvt_qp *qp,
252 int (*mtu_to_path_mtu)(u32 mtu);
253 int (*get_guid_be)(struct rvt_dev_info *rdi, struct rvt_ibport *rvp,
254 int guid_index, __be64 *guid);
255 int (*query_port_state)(struct rvt_dev_info *rdi, u8 port_num,
256 struct ib_port_attr *props);
257 int (*shut_down_port)(struct rvt_dev_info *rdi, u8 port_num);
258 void (*cap_mask_chg)(struct rvt_dev_info *rdi, u8 port_num);
260 /*--------------------*/
261 /* Optional functions */
262 /*--------------------*/
263 int (*check_ah)(struct ib_device *, struct ib_ah_attr *);
264 void (*notify_new_ah)(struct ib_device *, struct ib_ah_attr *,
266 int (*alloc_qpn)(struct rvt_dev_info *rdi, struct rvt_qpn_table *qpt,
267 enum ib_qp_type type, u8 port_num, gfp_t gfp);
269 * Return 0 if modification is valid, -errno otherwise
271 int (*check_modify_qp)(struct rvt_qp *qp, struct ib_qp_attr *attr,
272 int attr_mask, struct ib_udata *udata);
273 void (*modify_qp)(struct rvt_qp *qp, struct ib_qp_attr *attr,
274 int attr_mask, struct ib_udata *udata);
276 int (*check_send_wr)(struct rvt_qp *qp, struct ib_send_wr *wr);
278 void (*notify_create_mad_agent)(struct rvt_dev_info *rdi, int port_idx);
279 void (*notify_free_mad_agent)(struct rvt_dev_info *rdi, int port_idx);
282 struct rvt_dev_info {
283 struct ib_device ibdev; /* Keep this first. Nothing above here */
286 * Prior to calling for registration the driver will be responsible for
287 * allocating space for this structure.
289 * The driver will also be responsible for filling in certain members of
290 * dparms.props. The driver needs to fill in dparms exactly as it would
291 * want values reported to a ULP. This will be returned to the caller
292 * in rdmavt's device. The driver should also therefore refrain from
293 * modifying this directly after registration with rdmavt.
296 /* Driver specific properties */
297 struct rvt_driver_params dparms;
299 struct rvt_mregion __rcu *dma_mr;
300 struct rvt_lkey_table lkey_table;
302 /* Driver specific helper functions */
303 struct rvt_driver_provided driver_f;
307 spinlock_t n_pds_lock; /* Protect pd allocated count */
310 spinlock_t n_ahs_lock; /* Protect ah allocated count */
312 u32 n_srqs_allocated;
313 spinlock_t n_srqs_lock; /* Protect srqs allocated count */
316 struct rvt_ibport **ports;
319 struct rvt_qp_ibdev *qp_dev;
320 u32 n_qps_allocated; /* number of QPs allocated for device */
321 spinlock_t n_qps_lock; /* keep track of number of qps */
324 struct list_head pending_mmaps;
325 spinlock_t mmap_offset_lock; /* protect mmap_offset */
327 spinlock_t pending_lock; /* protect pending mmap list */
330 struct kthread_worker *worker; /* per device cq worker */
331 u32 n_cqs_allocated; /* number of CQs allocated for device */
332 spinlock_t n_cqs_lock; /* protect count of in use cqs */
335 u32 n_mcast_grps_allocated; /* number of mcast groups allocated */
336 spinlock_t n_mcast_grps_lock;
340 static inline struct rvt_pd *ibpd_to_rvtpd(struct ib_pd *ibpd)
342 return container_of(ibpd, struct rvt_pd, ibpd);
345 static inline struct rvt_ah *ibah_to_rvtah(struct ib_ah *ibah)
347 return container_of(ibah, struct rvt_ah, ibah);
350 static inline struct rvt_dev_info *ib_to_rvt(struct ib_device *ibdev)
352 return container_of(ibdev, struct rvt_dev_info, ibdev);
355 static inline struct rvt_srq *ibsrq_to_rvtsrq(struct ib_srq *ibsrq)
357 return container_of(ibsrq, struct rvt_srq, ibsrq);
360 static inline struct rvt_qp *ibqp_to_rvtqp(struct ib_qp *ibqp)
362 return container_of(ibqp, struct rvt_qp, ibqp);
365 static inline unsigned rvt_get_npkeys(struct rvt_dev_info *rdi)
368 * All ports have same number of pkeys.
370 return rdi->dparms.npkeys;
374 * Return the indexed PKEY from the port PKEY table.
376 static inline u16 rvt_get_pkey(struct rvt_dev_info *rdi,
380 if (index >= rvt_get_npkeys(rdi))
383 return rdi->ports[port_index]->pkey_table[index];
387 * rvt_lookup_qpn - return the QP with the given QPN
389 * @qpn: the QP number to look up
391 * The caller must hold the rcu_read_lock(), and keep the lock until
392 * the returned qp is no longer in use.
394 /* TODO: Remove this and put in rdmavt/qp.h when no longer needed by drivers */
395 static inline struct rvt_qp *rvt_lookup_qpn(struct rvt_dev_info *rdi,
396 struct rvt_ibport *rvp,
397 u32 qpn) __must_hold(RCU)
399 struct rvt_qp *qp = NULL;
401 if (unlikely(qpn <= 1)) {
402 qp = rcu_dereference(rvp->qp[qpn]);
404 u32 n = hash_32(qpn, rdi->qp_dev->qp_table_bits);
406 for (qp = rcu_dereference(rdi->qp_dev->qp_table[n]); qp;
407 qp = rcu_dereference(qp->next))
408 if (qp->ibqp.qp_num == qpn)
414 struct rvt_dev_info *rvt_alloc_device(size_t size, int nports);
415 int rvt_register_device(struct rvt_dev_info *rvd);
416 void rvt_unregister_device(struct rvt_dev_info *rvd);
417 int rvt_check_ah(struct ib_device *ibdev, struct ib_ah_attr *ah_attr);
418 int rvt_init_port(struct rvt_dev_info *rdi, struct rvt_ibport *port,
419 int port_index, u16 *pkey_table);
420 int rvt_rkey_ok(struct rvt_qp *qp, struct rvt_sge *sge,
421 u32 len, u64 vaddr, u32 rkey, int acc);
422 int rvt_lkey_ok(struct rvt_lkey_table *rkt, struct rvt_pd *pd,
423 struct rvt_sge *isge, struct ib_sge *sge, int acc);
424 int rvt_mmap(struct ib_ucontext *context, struct vm_area_struct *vma);
425 void rvt_release_mmap_info(struct kref *ref);
426 struct rvt_mmap_info *rvt_create_mmap_info(struct rvt_dev_info *rdi,
428 struct ib_ucontext *context,
430 void rvt_update_mmap_info(struct rvt_dev_info *rdi, struct rvt_mmap_info *ip,
431 u32 size, void *obj);
432 int rvt_reg_mr(struct rvt_qp *qp, struct ib_reg_wr *wr);
433 struct rvt_mcast *rvt_mcast_find(struct rvt_ibport *ibp, union ib_gid *mgid);
435 /* Temporary export */
436 void rvt_reset_qp(struct rvt_dev_info *rdi, struct rvt_qp *qp,
437 enum ib_qp_type type);
439 #endif /* DEF_RDMA_VT_H */