2 * Copyright(c) 2015 - 2017 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.
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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;
75 #define HFI1_MAX_RDMA_ATOMIC 16
78 * Increment this value if any changes that break userspace ABI
79 * compatibility are made.
81 #define HFI1_UVERBS_ABI_VERSION 2
83 /* IB Performance Manager status values */
84 #define IB_PMA_SAMPLE_STATUS_DONE 0x00
85 #define IB_PMA_SAMPLE_STATUS_STARTED 0x01
86 #define IB_PMA_SAMPLE_STATUS_RUNNING 0x02
88 /* Mandatory IB performance counter select values. */
89 #define IB_PMA_PORT_XMIT_DATA cpu_to_be16(0x0001)
90 #define IB_PMA_PORT_RCV_DATA cpu_to_be16(0x0002)
91 #define IB_PMA_PORT_XMIT_PKTS cpu_to_be16(0x0003)
92 #define IB_PMA_PORT_RCV_PKTS cpu_to_be16(0x0004)
93 #define IB_PMA_PORT_XMIT_WAIT cpu_to_be16(0x0005)
95 #define HFI1_VENDOR_IPG cpu_to_be16(0xFFA0)
97 #define IB_DEFAULT_GID_PREFIX cpu_to_be64(0xfe80000000000000ULL)
99 #define RC_OP(x) IB_OPCODE_RC_##x
100 #define UC_OP(x) IB_OPCODE_UC_##x
102 /* flags passed by hfi1_ib_rcv() */
104 HFI1_HAS_GRH = (1 << 0),
107 struct hfi1_ahg_info {
114 struct hfi1_sdma_header {
116 struct ib_header hdr;
120 * hfi1 specific data structures that will be hidden from rvt after the queue
121 * pair is made common
123 struct hfi1_qp_priv {
124 struct hfi1_ahg_info *s_ahg; /* ahg info for next header */
125 struct sdma_engine *s_sde; /* current sde */
126 struct send_context *s_sendcontext; /* current sendcontext */
127 u8 s_sc; /* SC[0..4] for next packet */
128 u8 r_adefered; /* number of acks defered */
129 struct iowait s_iowait;
130 struct rvt_qp *owner;
134 * This structure is used to hold commonly lookedup and computed values during
135 * the send engine progress.
137 struct hfi1_pkt_state {
138 struct hfi1_ibdev *dev;
139 struct hfi1_ibport *ibp;
140 struct hfi1_pportdata *ppd;
141 struct verbs_txreq *s_txreq;
145 #define HFI1_PSN_CREDIT 16
147 struct hfi1_opcode_stats {
148 u64 n_packets; /* number of packets */
149 u64 n_bytes; /* total number of bytes */
152 struct hfi1_opcode_stats_perctx {
153 struct hfi1_opcode_stats stats[256];
156 static inline void inc_opstats(
158 struct hfi1_opcode_stats *stats)
160 #ifdef CONFIG_DEBUG_FS
161 stats->n_bytes += tlen;
167 struct rvt_qp __rcu *qp[2];
168 struct rvt_ibport rvp;
170 /* the first 16 entries are sl_to_vl for !OPA */
176 struct rvt_dev_info rdi; /* Must be first */
178 /* QP numbers are shared by all IB ports */
179 /* protect txwait list */
180 seqlock_t txwait_lock ____cacheline_aligned_in_smp;
181 struct list_head txwait; /* list for wait verbs_txreq */
182 struct list_head memwait; /* list for wait kernel memory */
183 struct kmem_cache *verbs_txreq_cache;
187 /* protect iowait lists */
188 seqlock_t iowait_lock ____cacheline_aligned_in_smp;
191 struct timer_list mem_timer;
193 #ifdef CONFIG_DEBUG_FS
194 /* per HFI debugfs */
195 struct dentry *hfi1_ibdev_dbg;
196 /* per HFI symlinks to above */
197 struct dentry *hfi1_ibdev_link;
198 #ifdef CONFIG_FAULT_INJECTION
199 struct fault_opcode *fault_opcode;
200 struct fault_packet *fault_packet;
201 bool fault_suppress_err;
206 static inline struct hfi1_ibdev *to_idev(struct ib_device *ibdev)
208 struct rvt_dev_info *rdi;
210 rdi = container_of(ibdev, struct rvt_dev_info, ibdev);
211 return container_of(rdi, struct hfi1_ibdev, rdi);
214 static inline struct rvt_qp *iowait_to_qp(struct iowait *s_iowait)
216 struct hfi1_qp_priv *priv;
218 priv = container_of(s_iowait, struct hfi1_qp_priv, s_iowait);
223 * Send if not busy or waiting for I/O and either
224 * a RC response is pending or we can process send work requests.
226 static inline int hfi1_send_ok(struct rvt_qp *qp)
228 return !(qp->s_flags & (RVT_S_BUSY | RVT_S_ANY_WAIT_IO)) &&
229 (qp->s_hdrwords || (qp->s_flags & RVT_S_RESP_PENDING) ||
230 !(qp->s_flags & RVT_S_ANY_WAIT_SEND));
234 * This must be called with s_lock held.
236 void hfi1_bad_pqkey(struct hfi1_ibport *ibp, __be16 trap_num, u32 key, u32 sl,
237 u32 qp1, u32 qp2, u16 lid1, u16 lid2);
238 void hfi1_cap_mask_chg(struct rvt_dev_info *rdi, u8 port_num);
239 void hfi1_sys_guid_chg(struct hfi1_ibport *ibp);
240 void hfi1_node_desc_chg(struct hfi1_ibport *ibp);
241 int hfi1_process_mad(struct ib_device *ibdev, int mad_flags, u8 port,
242 const struct ib_wc *in_wc, const struct ib_grh *in_grh,
243 const struct ib_mad_hdr *in_mad, size_t in_mad_size,
244 struct ib_mad_hdr *out_mad, size_t *out_mad_size,
245 u16 *out_mad_pkey_index);
248 * The PSN_MASK and PSN_SHIFT allow for
249 * 1) comparing two PSNs
250 * 2) returning the PSN with any upper bits masked
251 * 3) returning the difference between to PSNs
253 * The number of significant bits in the PSN must
254 * necessarily be at least one bit less than
255 * the container holding the PSN.
257 #ifndef CONFIG_HFI1_VERBS_31BIT_PSN
258 #define PSN_MASK 0xFFFFFF
261 #define PSN_MASK 0x7FFFFFFF
264 #define PSN_MODIFY_MASK 0xFFFFFF
268 * Returns an integer <, ==, or > than zero.
270 static inline int cmp_psn(u32 a, u32 b)
272 return (((int)a) - ((int)b)) << PSN_SHIFT;
278 static inline u32 mask_psn(u32 a)
284 * Return delta between two PSNs
286 static inline u32 delta_psn(u32 a, u32 b)
288 return (((int)a - (int)b) << PSN_SHIFT) >> PSN_SHIFT;
292 void hfi1_put_txreq(struct verbs_txreq *tx);
294 int hfi1_verbs_send(struct rvt_qp *qp, struct hfi1_pkt_state *ps);
296 void hfi1_copy_sge(struct rvt_sge_state *ss, void *data, u32 length,
297 bool release, bool copy_last);
299 void hfi1_cnp_rcv(struct hfi1_packet *packet);
301 void hfi1_uc_rcv(struct hfi1_packet *packet);
303 void hfi1_rc_rcv(struct hfi1_packet *packet);
306 struct hfi1_ctxtdata *rcd,
307 struct ib_header *hdr,
311 u8 ah_to_sc(struct ib_device *ibdev, struct rdma_ah_attr *ah_attr);
313 struct ib_ah *hfi1_create_qp0_ah(struct hfi1_ibport *ibp, u16 dlid);
315 void hfi1_rc_send_complete(struct rvt_qp *qp, struct ib_header *hdr);
317 void hfi1_ud_rcv(struct hfi1_packet *packet);
319 int hfi1_lookup_pkey_idx(struct hfi1_ibport *ibp, u16 pkey);
321 int hfi1_rvt_get_rwqe(struct rvt_qp *qp, int wr_id_only);
323 void hfi1_migrate_qp(struct rvt_qp *qp);
325 int hfi1_check_modify_qp(struct rvt_qp *qp, struct ib_qp_attr *attr,
326 int attr_mask, struct ib_udata *udata);
328 void hfi1_modify_qp(struct rvt_qp *qp, struct ib_qp_attr *attr,
329 int attr_mask, struct ib_udata *udata);
330 void hfi1_restart_rc(struct rvt_qp *qp, u32 psn, int wait);
331 int hfi1_check_send_wqe(struct rvt_qp *qp, struct rvt_swqe *wqe);
333 extern const u32 rc_only_opcode;
334 extern const u32 uc_only_opcode;
336 static inline u8 get_opcode(struct ib_header *h)
338 u16 lnh = be16_to_cpu(h->lrh[0]) & 3;
340 if (lnh == IB_LNH_IBA_LOCAL)
341 return be32_to_cpu(h->u.oth.bth[0]) >> 24;
343 return be32_to_cpu(h->u.l.oth.bth[0]) >> 24;
346 int hfi1_ruc_check_hdr(struct hfi1_ibport *ibp, struct ib_header *hdr,
347 int has_grh, struct rvt_qp *qp, u32 bth0);
349 u32 hfi1_make_grh(struct hfi1_ibport *ibp, struct ib_grh *hdr,
350 struct ib_global_route *grh, u32 hwords, u32 nwords);
352 void hfi1_make_ruc_header(struct rvt_qp *qp, struct ib_other_headers *ohdr,
353 u32 bth0, u32 bth2, int middle,
354 struct hfi1_pkt_state *ps);
356 void _hfi1_do_send(struct work_struct *work);
358 void hfi1_do_send_from_rvt(struct rvt_qp *qp);
360 void hfi1_do_send(struct rvt_qp *qp, bool in_thread);
362 void hfi1_send_complete(struct rvt_qp *qp, struct rvt_swqe *wqe,
363 enum ib_wc_status status);
365 void hfi1_send_rc_ack(struct hfi1_ctxtdata *, struct rvt_qp *qp, int is_fecn);
367 int hfi1_make_rc_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps);
369 int hfi1_make_uc_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps);
371 int hfi1_make_ud_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps);
373 int hfi1_register_ib_device(struct hfi1_devdata *);
375 void hfi1_unregister_ib_device(struct hfi1_devdata *);
377 void hfi1_ib_rcv(struct hfi1_packet *packet);
379 unsigned hfi1_get_npkeys(struct hfi1_devdata *);
381 int hfi1_verbs_send_dma(struct rvt_qp *qp, struct hfi1_pkt_state *ps,
384 int hfi1_verbs_send_pio(struct rvt_qp *qp, struct hfi1_pkt_state *ps,
387 int hfi1_wss_init(void);
388 void hfi1_wss_exit(void);
390 /* platform specific: return the lowest level cache (llc) size, in KiB */
391 static inline int wss_llc_size(void)
393 /* assume that the boot CPU value is universal for all CPUs */
394 return boot_cpu_data.x86_cache_size;
397 /* platform specific: cacheless copy */
398 static inline void cacheless_memcpy(void *dst, void *src, size_t n)
401 * Use the only available X64 cacheless copy. Add a __user cast
402 * to quiet sparse. The src agument is already in the kernel so
403 * there are no security issues. The extra fault recovery machinery
406 __copy_user_nocache(dst, (void __user *)src, n, 0);
409 extern const enum ib_wc_opcode ib_hfi1_wc_opcode[];
411 extern const u8 hdr_len_by_opcode[];
413 extern const int ib_rvt_state_ops[];
415 extern __be64 ib_hfi1_sys_image_guid; /* in network order */
417 extern unsigned int hfi1_max_cqes;
419 extern unsigned int hfi1_max_cqs;
421 extern unsigned int hfi1_max_qp_wrs;
423 extern unsigned int hfi1_max_qps;
425 extern unsigned int hfi1_max_sges;
427 extern unsigned int hfi1_max_mcast_grps;
429 extern unsigned int hfi1_max_mcast_qp_attached;
431 extern unsigned int hfi1_max_srqs;
433 extern unsigned int hfi1_max_srq_sges;
435 extern unsigned int hfi1_max_srq_wrs;
437 extern unsigned short piothreshold;
439 extern const u32 ib_hfi1_rnr_table[];
441 #endif /* HFI1_VERBS_H */