2 * Copyright(c) 2015 - 2018 Intel Corporation.
4 * This file is provided under a dual BSD/GPLv2 license. When using or
5 * redistributing this file, you may do so under either license.
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of version 2 of the GNU General Public License as
11 * published by the Free Software Foundation.
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
20 * Redistribution and use in source and binary forms, with or without
21 * modification, are permitted provided that the following conditions
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51 #include <linux/types.h>
52 #include <linux/seqlock.h>
53 #include <linux/kernel.h>
54 #include <linux/interrupt.h>
55 #include <linux/kref.h>
56 #include <linux/workqueue.h>
57 #include <linux/kthread.h>
58 #include <linux/completion.h>
59 #include <linux/slab.h>
60 #include <rdma/ib_pack.h>
61 #include <rdma/ib_user_verbs.h>
62 #include <rdma/ib_mad.h>
63 #include <rdma/ib_hdrs.h>
64 #include <rdma/rdma_vt.h>
65 #include <rdma/rdmavt_qp.h>
66 #include <rdma/rdmavt_cq.h>
69 struct hfi1_pportdata;
76 #define HFI1_MAX_RDMA_ATOMIC 16
79 * Increment this value if any changes that break userspace ABI
80 * compatibility are made.
82 #define HFI1_UVERBS_ABI_VERSION 2
84 /* IB Performance Manager status values */
85 #define IB_PMA_SAMPLE_STATUS_DONE 0x00
86 #define IB_PMA_SAMPLE_STATUS_STARTED 0x01
87 #define IB_PMA_SAMPLE_STATUS_RUNNING 0x02
89 /* Mandatory IB performance counter select values. */
90 #define IB_PMA_PORT_XMIT_DATA cpu_to_be16(0x0001)
91 #define IB_PMA_PORT_RCV_DATA cpu_to_be16(0x0002)
92 #define IB_PMA_PORT_XMIT_PKTS cpu_to_be16(0x0003)
93 #define IB_PMA_PORT_RCV_PKTS cpu_to_be16(0x0004)
94 #define IB_PMA_PORT_XMIT_WAIT cpu_to_be16(0x0005)
96 #define HFI1_VENDOR_IPG cpu_to_be16(0xFFA0)
98 #define IB_DEFAULT_GID_PREFIX cpu_to_be64(0xfe80000000000000ULL)
99 #define OPA_BTH_MIG_REQ BIT(31)
101 #define RC_OP(x) IB_OPCODE_RC_##x
102 #define UC_OP(x) IB_OPCODE_UC_##x
104 /* flags passed by hfi1_ib_rcv() */
106 HFI1_HAS_GRH = (1 << 0),
109 #define LRH_16B_BYTES (FIELD_SIZEOF(struct hfi1_16b_header, lrh))
110 #define LRH_16B_DWORDS (LRH_16B_BYTES / sizeof(u32))
111 #define LRH_9B_BYTES (FIELD_SIZEOF(struct ib_header, lrh))
112 #define LRH_9B_DWORDS (LRH_9B_BYTES / sizeof(u32))
114 /* 24Bits for qpn, upper 8Bits reserved */
115 struct opa_16b_mgmt {
120 struct hfi1_16b_header {
125 struct ib_other_headers oth;
127 struct ib_other_headers oth;
128 struct opa_16b_mgmt mgmt;
132 struct hfi1_opa_header {
134 struct ib_header ibh; /* 9B header */
135 struct hfi1_16b_header opah; /* 16B header */
137 u8 hdr_type; /* 9B or 16B */
140 struct hfi1_ahg_info {
147 struct hfi1_sdma_header {
149 struct hfi1_opa_header hdr;
153 * hfi1 specific data structures that will be hidden from rvt after the queue
154 * pair is made common
156 struct hfi1_qp_priv {
157 struct hfi1_ahg_info *s_ahg; /* ahg info for next header */
158 struct sdma_engine *s_sde; /* current sde */
159 struct send_context *s_sendcontext; /* current sendcontext */
160 struct hfi1_ctxtdata *rcd; /* QP's receive context */
161 u8 s_sc; /* SC[0..4] for next packet */
162 struct iowait s_iowait;
163 struct rvt_qp *owner;
164 u8 hdr_type; /* 9B or 16B */
168 * This structure is used to hold commonly lookedup and computed values during
169 * the send engine progress.
172 struct hfi1_pkt_state {
173 struct hfi1_ibdev *dev;
174 struct hfi1_ibport *ibp;
175 struct hfi1_pportdata *ppd;
176 struct verbs_txreq *s_txreq;
177 struct iowait_work *wait;
179 unsigned long timeout;
180 unsigned long timeout_int;
187 #define HFI1_PSN_CREDIT 16
189 struct hfi1_opcode_stats {
190 u64 n_packets; /* number of packets */
191 u64 n_bytes; /* total number of bytes */
194 struct hfi1_opcode_stats_perctx {
195 struct hfi1_opcode_stats stats[256];
198 static inline void inc_opstats(
200 struct hfi1_opcode_stats *stats)
202 #ifdef CONFIG_DEBUG_FS
203 stats->n_bytes += tlen;
209 struct rvt_qp __rcu *qp[2];
210 struct rvt_ibport rvp;
212 /* the first 16 entries are sl_to_vl for !OPA */
218 struct rvt_dev_info rdi; /* Must be first */
220 /* QP numbers are shared by all IB ports */
221 /* protect txwait list */
222 seqlock_t txwait_lock ____cacheline_aligned_in_smp;
223 struct list_head txwait; /* list for wait verbs_txreq */
224 struct list_head memwait; /* list for wait kernel memory */
225 struct kmem_cache *verbs_txreq_cache;
229 /* protect iowait lists */
230 seqlock_t iowait_lock ____cacheline_aligned_in_smp;
233 struct timer_list mem_timer;
235 #ifdef CONFIG_DEBUG_FS
236 /* per HFI debugfs */
237 struct dentry *hfi1_ibdev_dbg;
238 /* per HFI symlinks to above */
239 struct dentry *hfi1_ibdev_link;
240 #ifdef CONFIG_FAULT_INJECTION
246 static inline struct hfi1_ibdev *to_idev(struct ib_device *ibdev)
248 struct rvt_dev_info *rdi;
250 rdi = container_of(ibdev, struct rvt_dev_info, ibdev);
251 return container_of(rdi, struct hfi1_ibdev, rdi);
254 static inline struct rvt_qp *iowait_to_qp(struct iowait *s_iowait)
256 struct hfi1_qp_priv *priv;
258 priv = container_of(s_iowait, struct hfi1_qp_priv, s_iowait);
263 * This must be called with s_lock held.
265 void hfi1_bad_pkey(struct hfi1_ibport *ibp, u32 key, u32 sl,
266 u32 qp1, u32 qp2, u32 lid1, u32 lid2);
267 void hfi1_cap_mask_chg(struct rvt_dev_info *rdi, u8 port_num);
268 void hfi1_sys_guid_chg(struct hfi1_ibport *ibp);
269 void hfi1_node_desc_chg(struct hfi1_ibport *ibp);
270 int hfi1_process_mad(struct ib_device *ibdev, int mad_flags, u8 port,
271 const struct ib_wc *in_wc, const struct ib_grh *in_grh,
272 const struct ib_mad_hdr *in_mad, size_t in_mad_size,
273 struct ib_mad_hdr *out_mad, size_t *out_mad_size,
274 u16 *out_mad_pkey_index);
277 * The PSN_MASK and PSN_SHIFT allow for
278 * 1) comparing two PSNs
279 * 2) returning the PSN with any upper bits masked
280 * 3) returning the difference between to PSNs
282 * The number of significant bits in the PSN must
283 * necessarily be at least one bit less than
284 * the container holding the PSN.
286 #define PSN_MASK 0x7FFFFFFF
288 #define PSN_MODIFY_MASK 0xFFFFFF
292 * Returns an integer <, ==, or > than zero.
294 static inline int cmp_psn(u32 a, u32 b)
296 return (((int)a) - ((int)b)) << PSN_SHIFT;
302 static inline u32 mask_psn(u32 a)
308 * Return delta between two PSNs
310 static inline u32 delta_psn(u32 a, u32 b)
312 return (((int)a - (int)b) << PSN_SHIFT) >> PSN_SHIFT;
316 void hfi1_put_txreq(struct verbs_txreq *tx);
318 int hfi1_verbs_send(struct rvt_qp *qp, struct hfi1_pkt_state *ps);
320 void hfi1_cnp_rcv(struct hfi1_packet *packet);
322 void hfi1_uc_rcv(struct hfi1_packet *packet);
324 void hfi1_rc_rcv(struct hfi1_packet *packet);
327 struct hfi1_ctxtdata *rcd,
328 struct hfi1_packet *packet,
331 u8 ah_to_sc(struct ib_device *ibdev, struct rdma_ah_attr *ah_attr);
333 void hfi1_rc_send_complete(struct rvt_qp *qp, struct hfi1_opa_header *opah);
335 void hfi1_ud_rcv(struct hfi1_packet *packet);
337 int hfi1_lookup_pkey_idx(struct hfi1_ibport *ibp, u16 pkey);
339 void hfi1_migrate_qp(struct rvt_qp *qp);
341 int hfi1_check_modify_qp(struct rvt_qp *qp, struct ib_qp_attr *attr,
342 int attr_mask, struct ib_udata *udata);
344 void hfi1_modify_qp(struct rvt_qp *qp, struct ib_qp_attr *attr,
345 int attr_mask, struct ib_udata *udata);
346 void hfi1_restart_rc(struct rvt_qp *qp, u32 psn, int wait);
347 int hfi1_setup_wqe(struct rvt_qp *qp, struct rvt_swqe *wqe,
350 extern const u32 rc_only_opcode;
351 extern const u32 uc_only_opcode;
353 int hfi1_ruc_check_hdr(struct hfi1_ibport *ibp, struct hfi1_packet *packet);
355 u32 hfi1_make_grh(struct hfi1_ibport *ibp, struct ib_grh *hdr,
356 const struct ib_global_route *grh, u32 hwords, u32 nwords);
358 void hfi1_make_ruc_header(struct rvt_qp *qp, struct ib_other_headers *ohdr,
359 u32 bth0, u32 bth2, int middle,
360 struct hfi1_pkt_state *ps);
362 void _hfi1_do_send(struct work_struct *work);
364 void hfi1_do_send_from_rvt(struct rvt_qp *qp);
366 void hfi1_do_send(struct rvt_qp *qp, bool in_thread);
368 void hfi1_send_rc_ack(struct hfi1_packet *packet, bool is_fecn);
370 int hfi1_make_rc_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps);
372 int hfi1_make_uc_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps);
374 int hfi1_make_ud_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps);
376 int hfi1_register_ib_device(struct hfi1_devdata *);
378 void hfi1_unregister_ib_device(struct hfi1_devdata *);
380 void hfi1_ib_rcv(struct hfi1_packet *packet);
382 void hfi1_16B_rcv(struct hfi1_packet *packet);
384 unsigned hfi1_get_npkeys(struct hfi1_devdata *);
386 int hfi1_verbs_send_dma(struct rvt_qp *qp, struct hfi1_pkt_state *ps,
389 int hfi1_verbs_send_pio(struct rvt_qp *qp, struct hfi1_pkt_state *ps,
392 static inline bool opa_bth_is_migration(struct ib_other_headers *ohdr)
394 return ohdr->bth[1] & cpu_to_be32(OPA_BTH_MIG_REQ);
397 extern const enum ib_wc_opcode ib_hfi1_wc_opcode[];
399 extern const u8 hdr_len_by_opcode[];
401 extern const int ib_rvt_state_ops[];
403 extern __be64 ib_hfi1_sys_image_guid; /* in network order */
405 extern unsigned int hfi1_max_cqes;
407 extern unsigned int hfi1_max_cqs;
409 extern unsigned int hfi1_max_qp_wrs;
411 extern unsigned int hfi1_max_qps;
413 extern unsigned int hfi1_max_sges;
415 extern unsigned int hfi1_max_mcast_grps;
417 extern unsigned int hfi1_max_mcast_qp_attached;
419 extern unsigned int hfi1_max_srqs;
421 extern unsigned int hfi1_max_srq_sges;
423 extern unsigned int hfi1_max_srq_wrs;
425 extern unsigned short piothreshold;
427 extern const u32 ib_hfi1_rnr_table[];
429 #endif /* HFI1_VERBS_H */